1 $Cambridge: exim/doc/doc-txt/ChangeLog,v 1.509 2007/05/17 19:58:48 tom 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.
45 MH/01 Fix for bug #448, segfault in Dovecot authenticator when interface_address
46 is unset (happens when testing with -bh and -oMi isn't used). Thanks to
49 PH/01 Added a new log selector smtp_no_mail, to log SMTP sessions that do not
52 PH/02 In an ACL statement such as
54 deny dnslists = X!=127.0.0.2 : X=127.0.0.2
56 if a client was not listed at all, or was listed with a value other than
57 127.0.0.2, in the X list, but was listed with 127.0.0.2 in the Y list,
58 the condition was not true (as it should be), so access was not denied.
59 The bug was that the ! inversion was incorrectly passed on to the second
60 item. This has been fixed.
62 PH/03 Added additional dnslists conditions == and =& which are different from
63 = and & when the dns lookup returns more than one IP address.
65 PH/04 Added gnutls_require_{kx,mac,protocols} to give more control over the
66 cipher suites used by GnuTLS. These options are ignored by OpenSSL.
68 PH/05 After discussion on the list, added a compile time option ENABLE_DISABLE_
69 FSYNC, which compiles an option called disable_fsync that allows for
70 bypassing fsync(). The documentation is heavily laced with warnings.
72 SC/01 Updated eximstats to collate all SpamAssassin rejects into one bucket.
74 PH/06 Some tidies to the infrastructure of the Test Suite that is concerned
75 with the auxiliary C programs that it uses: (1) Arrange for BIND_8_COMPAT
76 to be defined when compiling on OSX (Darwin); (2) Tidies to the Makefile,
77 including adding "make clean"; (3) Added -fPIC when compiling the test
78 dynamically loaded module, to get rid of a warning.
80 MH/02 Fix for bug #451, causing paniclog entries to be written if a bounce
81 message fails, move_frozen_messages = true and ignore_bounce_errors_after
82 = 0s. The bug is otherwise harmless.
84 PH/07 There was a bug in the dovecot authenticator such that the value of
85 $auth1 could be overwritten, and so not correctly preserved, after a
86 successful authentication. This usually meant that the value preserved by
87 the server_setid option was incorrect.
89 PH/08 Added $smtp_count_at_connection_start, deliberately with a long name.
91 PH/09 Installed PCRE release 7.0.
93 PH/10 The acl_not_smtp_start ACL was, contrary to the documentation, not being
94 run for batched SMTP input. It is now run at the start of every message
95 in the batch. While fixing this I discovered that the process information
96 (output by running exiwhat) was not always getting set for -bs and -bS
97 input. This is fixed, and it now also says "batched" for BSMTP.
99 PH/11 Added control=no_pipelining.
101 PH/12 Added $sending_ip_address and $sending_port (mostly Magnus Holmgren's
102 patch, slightly modified), and move the expansion of helo_data till after
103 the connection is made in the smtp transport (so it can use these
106 PH/13 Added ${rfc2047d: to decoded RFC 2047 strings.
108 PH/14 Added log_selector = +pid.
110 PH/15 Flush SMTP output before delaying, unless control=no_delay_flush is set.
112 PH/16 Add ${if forany and ${if forall.
114 PH/17 Added dsn_from option to vary the From: line in DSNs.
116 PH/18 Flush SMTP output before performing a callout, unless control =
117 no_callout_flush is set.
119 PH/19 Change 4.64/PH/36 introduced a bug: when address_retry_include_sender
120 was true (the default) a successful delivery failed to delete the retry
121 item, thus causing premature timeout of the address. The bug is now
124 PH/20 Added hosts_avoid_pipelining to the smtp transport.
126 PH/21 Long custom messages for fakedefer and fakereject are now split up
127 into multiline reponses in the same way that messages for "deny" and
128 other ACL rejections are.
130 PH/22 Applied Jori Hamalainen's speed-up changes and typo fixes to exigrep,
131 with slight modification.
133 PH/23 Applied sieve patches from the maintainer "tracking the latest notify
134 draft, changing the syntax and factoring some duplicate code".
136 PH/24 When the log selector "outgoing_port" was set, the port was shown as -1
137 for deliveries of the second and subsequent messages over the same SMTP
140 PH/25 Applied Magnus Holmgren's patch for ${addresses, ${map, ${filter, and
141 ${reduce, with only minor "tidies".
143 SC/02 Applied Daniel Tiefnig's patch to improve the '($parent) =' pattern match.
145 PH/26 Added a "continue" ACL modifier that does nothing, for the benefit of its
146 expansion side effects.
148 PH/27 When a message times out after an over-quota error from an Exim-imposed
149 quota, the bounce message says "mailbox is full". This message was not
150 being given when it was a system quota that was exceeded. It now should
153 MH/03 Made $recipients available in local_scan(). local_scan() already has
154 better access to the recipient list through recipients_list[], but
155 $recipients can be useful in postmaster-provided expansion strings.
157 PH/28 The $smtp_command and $smtp_command_argument variables were not correct
158 in the case of a MAIL command with additional options following the
159 address, for example: MAIL FROM:<foo@bar> SIZE=1234. The option settings
160 were accidentally chopped off.
162 PH/29 SMTP synchronization checks are implemented when a command is read -
163 there is a check that no more input is waiting when there shouldn't be
164 any. However, for some commands, a delay in an ACL can mean that it is
165 some time before the response is written. In this time, more input might
166 arrive, invalidly. So now there are extra checks after an ACL has run for
167 HELO/EHLO and after the predata ACL, and likewise for MAIL and RCPT when
168 pipelining has not been advertised.
170 PH/30 MH's patch to allow iscntrl() characters to be list separators.
172 PH/31 Unlike :fail:, a custom message specified with :defer: was not being
173 returned in the SMTP response when smtp_return_error_details was false.
176 PH/32 Change the Dovecot authenticator to use read() and write() on the socket
177 instead of the C I/O that was originally supplied, because problems were
180 PH/33 Compile failed with OpenSSL 0.9.8e. This was due to a coding error in
181 Exim which did not show up earlier: it was assuming that a call to
182 SSL_CTX_set_info_callback() might give an error value. In fact, there is
183 no error. In previous releases of OpenSSL, SSL_CTX_set_info_callback()
184 was a macro that became an assignment, so it seemed to work. This has
185 changed to a proper function call with a void return, hence the compile
186 error. Exim's code has been fixed.
188 PH/34 Change HDA_SIZE in oracle.c from 256 to 512. This is needed for 64-bit
191 PH/35 Applied a patch from the Sieve maintainer which fixes a bug in "notify".
193 PH/36 Applied John Jetmore's patch to add -v functionality to exigrep.
195 PH/37 If a message is not accepted after it has had an id assigned (e.g.
196 because it turns out to be too big or there is a timeout) there is no
197 "Completed" line in the log. When some messages of this type were
198 selected by exigrep, they were listed as "not completed". Others were
199 picked up by some special patterns. I have improved the selection
200 criteria to be more general.
202 PH/38 The host_find_failed option in the manualroute router can now be set
203 to "ignore", to completely ignore a host whose IP address cannot be
204 found. If all hosts are ignored, the behaviour is controlled by the new
205 host_all_ignored option.
207 PH/39 In a list of hosts for manualroute, if one item (either because of multi-
208 homing or because of multiple MX records with /mx) generated more than
209 one IP address, and the following item turned out to be the local host,
210 all the secondary addresses of the first item were incorrectly removed
211 from the list, along with the local host and any following hosts (which
212 is what is supposed to happen).
214 PH/40 When Exim receives a message, it writes the login name, uid, and gid of
215 whoever called Exim into the -H file. In the case of the daemon it was
216 behaving confusingly. When first started, it used values for whoever
217 started the daemon, but after a SIGHUP it used the Exim user (because it
218 calls itself on a restart). I have changed the code so that it now always
221 PH/41 (Following a suggestion from Tony Finch) If all the RCPT commands in a
222 message are rejected with the same error (e.g. no authentication or bad
223 sender address), and a DATA command is nevertheless sent (as can happen
224 with PIPELINING or a stupid MUA), the error message that was given to the
225 RCPT commands is included in the rejection of the DATA command. This is
226 intended to be helpful for MUAs that show only the final error to their
229 PH/42 Another patch from the Sieve maintainer.
231 SC/02 Eximstats - Differentiate between permanent and temporary rejects.
232 Eximstats - Fixed some broken HTML links and added missing column headers
234 Eximstats - Fixed Grand Total Summary Domains, Edomains, and Email
235 columns for Rejects, Temp Rejects, Ham, and Spam rows.
237 SC/03 Eximstats - V1.58 Fix to get <> and blackhole to show in edomain tables.
239 PH/43 Yet another patch from the Sieve maintainer.
241 PH/44 I found a way to check for a TCP/IP connection going away before sending
242 the response to the final '.' that terminates a message, but only in the
243 case where the client has not sent further data following the '.'
244 (unfortunately, this is allowed). However, in many cases there won't be
245 any further data because there won't be any more messages to send. A call
246 to select() can be used: if it shows that the input is "ready", there is
247 either input waiting, or the socket has been closed. An attempt to read
248 the next input character can distinguish the two cases. Previously, Exim
249 would have sent an OK response which the client would never have see.
250 This could lead to message repetition. This fix should cure that, at
251 least in a lot of common cases.
253 PH/45 Do not advertise STARTTLS in response to HELP unless it would be
254 advertised in response to EHLO.
260 PH/01 Two more bugs that were introduced by 4.64/PH/07, in addition to the one
261 fixed by 4.65/MH/01 (is this a record?) are fixed:
263 (i) An empty string was always treated as zero by the numeric comparison
264 operators. This behaviour has been restored.
266 (ii) It is documented that the numeric comparison operators always treat
267 their arguments as decimal numbers. This was broken in that numbers
268 starting with 0 were being interpreted as octal.
270 While fixing these problems I realized that there was another issue that
271 hadn't been noticed. Values of message_size_limit (both the global option
272 and the transport option) were treated as octal if they started with 0.
273 The documentation was vague. These values are now always treated as
274 decimal, and I will make that clear in the documentation.
280 TK/01 Disable default definition of HAVE_LINUX_SENDFILE. Clashes with
281 Linux large file support (_FILE_OFFSET_BITS=64) on older glibc
284 MH/01 Don't check that the operands of numeric comparison operators are
285 integers when their expansion is in "skipping" mode (fixes bug
286 introduced by 4.64-PH/07).
288 PH/01 If a system filter or a router generates more than SHRT_MAX (32767)
289 child addresses, Exim now panics and dies. Previously, because the count
290 is held in a short int, deliveries were likely to be lost. As such a
291 large number of recipients for a single message is ridiculous
292 (performance will be very, very poor), I have chosen to impose a limit
293 rather than extend the field.
299 TK/01 Bugzilla #401. Fix DK spooling code so that it can overwrite a
300 leftover -K file (the existence of which was triggered by #402).
301 While we were at it, introduced process PID as part of the -K
302 filename. This should rule out race conditions when creating
305 TK/02 Bugzilla #402. Apply patch from Simon Arlott, speeding up DK signing
306 processing considerably. Previous code took too long for large mails,
307 triggering a timeout which in turn triggers #401.
309 TK/03 Introduced HAVE_LINUX_SENDFILE to os.h-Linux. Currently only used
310 in the DK code in transports.c. sendfile() is not really portable,
311 hence the _LINUX specificness.
313 TF/01 In the add_headers option to the mail command in an Exim filter,
314 there was a bug that Exim would claim a syntax error in any
315 header after the first one which had an odd number of characters
318 PH/01 If a server that rejects MAIL FROM:<> was the target of a sender
319 callout verification, Exim cached a "reject" for the entire domain. This
320 is correct for most verifications, but it is not correct for a recipient
321 verification with use_sender or use_postmaster set, because in that case
322 the callout does not use MAIL FROM:<>. Exim now distinguishes the special
323 case of MAIL FROM:<> rejection from other early rejections (e.g.
324 rejection of HELO). When verifying a recipient using a non-null MAIL
325 address, the cache is ignored if it shows MAIL FROM:<> rejection.
326 Whatever the result of the callout, the value of the domain cache is
327 left unchanged (for any other kind of callout, getting as far as trying
328 RCPT means that the domain itself is ok).
330 PH/02 Tidied a number of unused variable and signed/unsigned warnings that
333 PH/03 On Solaris, an unexpectedly close socket (dropped connection) can
334 manifest itself as EPIPE rather than ECONNECT. When tidying away a
335 session, the daemon ignores ECONNECT errors and logs others; it now
336 ignores EPIPE as well.
338 PH/04 Applied Nico Erfurth's refactoring patch to tidy up mime.c
339 (quoted-printable decoding).
341 PH/05 Applied Nico Erfurth's refactoring patch to tidy up spool_mbox.c, and
342 later the small subsequent patch to fix an introduced bug.
344 PH/06 Installed the latest Cygwin Makefile from the Cygwin maintainer.
346 PH/07 There was no check for overflow in expansions such as ${if >{1}{4096M}}.
348 PH/08 An error is now given if message_size_limit is specified negative.
350 PH/09 Applied and tidied up Jakob Hirsch's patch for allowing ACL variables
351 to be given (somewhat) arbitrary names.
353 JJ/01 exipick 20060919.0, allow for arbitrary acl_ variables introduced
356 JJ/02 exipick 20060919.0, --show-vars args can now be regular expressions,
357 miscellaneous code fixes
359 PH/10 Added the log_reject_target ACL modifier to specify where to log
362 PH/11 Callouts were setting the name used for EHLO/HELO from $smtp_active_
363 hostname. This is wrong, because it relates to the incoming message (and
364 probably the interface on which it is arriving) and not to the outgoing
365 callout (which could be using a different interface). This has been
366 changed to use the value of the helo_data option from the smtp transport
367 instead - this is what is used when a message is actually being sent. If
368 there is no remote transport (possible with a router that sets up host
369 addresses), $smtp_active_hostname is used.
371 PH/12 Installed Andrey Panin's patch to add a dovecot authenticator. Various
372 tweaks were necessary in order to get it to work (see also 21 below):
373 (a) The code assumed that strncpy() returns a negative number on buffer
374 overflow, which isn't the case. Replaced with Exim's string_format()
376 (b) There were several signed/unsigned issues. I just did the minimum
377 hacking in of casts. There is scope for a larger refactoring.
378 (c) The code used strcasecmp() which is not a standard C function.
379 Replaced with Exim's strcmpic() function.
380 (d) The code set only $1; it now sets $auth1 as well.
381 (e) A simple test gave the error "authentication client didn't specify
382 service in request". It would seem that Dovecot has changed its
383 interface. Fortunately there's a specification; I followed it and
384 changed what the client sends and it appears to be working now.
386 PH/13 Added $message_headers_raw to provide the headers without RFC 2047
389 PH/14 Corrected misleading output from -bv when -v was also used. Suppose the
390 address A is aliased to B and C, where B exists and C does not. Without
391 -v the output is "A verified" because verification stops after a
392 successful redirection if more than one address is generated. However,
393 with -v the child addresses are also verified. Exim was outputting "A
394 failed to verify" and then showing the successful verification for C,
395 with its parentage. It now outputs "B failed to verify", showing B's
396 parentage before showing the successful verification of C.
398 PH/15 Applied Michael Deutschmann's patch to allow DNS black list processing to
399 look up a TXT record in a specific list after matching in a combined
402 PH/16 It seems that the options setting for the resolver (RES_DEFNAMES and
403 RES_DNSRCH) can affect the behaviour of gethostbyname() and friends when
404 they consult the DNS. I had assumed they would set it the way they
405 wanted; and indeed my experiments on Linux seem to show that in some
406 cases they do (I could influence IPv6 lookups but not IPv4 lookups).
407 To be on the safe side, however, I have now made the interface to
408 host_find_byname() similar to host_find_bydns(), with an argument
409 containing the DNS resolver options. The host_find_byname() function now
410 sets these options at its start, just as host_find_bydns() does. The smtp
411 transport options dns_qualify_single and dns_search_parents are passed to
412 host_find_byname() when gethostbyname=TRUE in this transport. Other uses
413 of host_find_byname() use the default settings of RES_DEFNAMES
414 (qualify_single) but not RES_DNSRCH (search_parents).
416 PH/17 Applied (a modified version of) Nico Erfurth's patch to make
417 spool_read_header() do less string testing, by means of a preliminary
418 switch on the second character of optional "-foo" lines. (This is
419 overdue, caused by the large number of possibilities that now exist.
420 Originally there were few.) While I was there, I also converted the
421 str(n)cmp tests so they don't re-test the leading "-" and the first
422 character, in the hope this might squeeze out yet more improvement.
424 PH/18 Two problems with "group" syntax in header lines when verifying: (1) The
425 flag allowing group syntax was set by the header_syntax check but not
426 turned off, possible causing trouble later; (2) The flag was not being
427 set at all for the header_verify test, causing "group"-style headers to
428 be rejected. I have now set it in this case, and also caused header_
429 verify to ignore an empty address taken from a group. While doing this, I
430 came across some other cases where the code for allowing group syntax
431 while scanning a header line wasn't quite right (mostly, not resetting
432 the flag correctly in the right place). These bugs could have caused
433 trouble for malformed header lines. I hope it is now all correct.
435 PH/19 The functions {pwcheck,saslauthd}_verify_password() are always called
436 with the "reply" argument non-NULL. The code, however (which originally
437 came from elsewhere) had *some* tests for NULL when it wrote to *reply,
438 but it didn't always do it. This confused somebody who was copying the
439 code for some other use. I have removed all the tests.
441 PH/20 It was discovered that the GnuTLS code had support for RSA_EXPORT, a
442 feature that was used to support insecure browsers during the U.S. crypto
443 embargo. It requires special client support, and Exim is probably the
444 only MTA that supported it -- and would never use it because real RSA is
445 always available. This code has been removed, because it had the bad
446 effect of slowing Exim down by computing (never used) parameters for the
447 RSA_EXPORT functionality.
449 PH/21 On the advice of Timo Sirainen, added a check to the dovecot
450 authenticator to fail if there's a tab character in the incoming data
451 (there should never be unless someone is messing about, as it's supposed
452 to be base64-encoded). Also added, on Timo's advice, the "secured" option
453 if the connection is using TLS or if the remote IP is the same as the
454 local IP, and the "valid-client-cert option" if a client certificate has
457 PH/22 As suggested by Dennis Davis, added a server_condition option to *all*
458 authenticators. This can be used for authorization after authentication
459 succeeds. (In the case of plaintext, it servers for both authentication
462 PH/23 Testing for tls_required and lost_connection in a retry rule didn't work
463 if any retry times were supplied.
465 PH/24 Exim crashed if verify=helo was activated during an incoming -bs
466 connection, where there is no client IP address to check. In this
467 situation, the verify now always succeeds.
469 PH/25 Applied John Jetmore's -Mset patch.
471 PH/26 Added -bem to be like -Mset, but loading a message from a file.
473 PH/27 In a string expansion for a processed (not raw) header when multiple
474 headers of the same name were present, leading whitespace was being
475 removed from all of them, but trailing whitespace was being removed only
476 from the last one. Now trailing whitespace is removed from each header
477 before concatenation. Completely empty headers in a concatenation (as
480 PH/28 Fixed bug in backwards-compatibility feature of PH/09 (thanks to John
481 Jetmore). It would have mis-read ACL variables from pre-4.61 spool files.
483 PH/29 [Removed. This was a change that I later backed out, and forgot to
484 correct the ChangeLog entry (that I had efficiently created) before
485 committing the later change.]
487 PH/30 Exim was sometimes attempting to deliver messages that had suffered
488 address errors (4xx response to RCPT) over the same connection as other
489 messages routed to the same hosts. Such deliveries are always "forced",
490 so retry times are not inspected. This resulted in far too many retries
491 for the affected addresses. The effect occurred only when there were more
492 hosts than the hosts_max_try setting in the smtp transport when it had
493 the 4xx errors. Those hosts that it had tried were not added to the list
494 of hosts for which the message was waiting, so if all were tried, there
495 was no problem. Two fixes have been applied:
497 (i) If there are any address or message errors in an SMTP delivery, none
498 of the hosts (tried or untried) are now added to the list of hosts
499 for which the message is waiting, so the message should not be a
500 candidate for sending over the same connection that was used for a
501 successful delivery of some other message. This seems entirely
502 reasonable: after all the message is NOT "waiting for some host".
503 This is so "obvious" that I'm not sure why it wasn't done
504 previously. Hope I haven't missed anything, but it can't do any
505 harm, as the worst effect is to miss an optimization.
507 (ii) If, despite (i), such a delivery is accidentally attempted, the
508 routing retry time is respected, so at least it doesn't keep
509 hammering the server.
511 PH/31 Installed Andrew Findlay's patch to close the writing end of the socket
512 in ${readsocket because some servers need this prod.
514 PH/32 Added some extra debug output when updating a wait-xxx database.
516 PH/33 The hint "could be header name not terminated by colon", which has been
517 given for certain expansion errors for a long time, was not being given
518 for the ${if def:h_colon_omitted{... case.
520 PH/34 The spec says: "With one important exception, whenever a domain list is
521 being scanned, $domain contains the subject domain." There was at least
522 one case where this was not true.
524 PH/35 The error "getsockname() failed: connection reset by peer" was being
525 written to the panic log as well as the main log, but it isn't really
526 panic-worthy as it just means the connection died rather early on. I have
527 removed the panic log writing for the ECONNRESET error when getsockname()
530 PH/36 After a 4xx response to a RCPT error, that address was delayed (in queue
531 runs only) independently of the message's sender address. This meant
532 that, if the 4xx error was in fact related to the sender, a different
533 message to the same recipient with a different sender could confuse
534 things. In particualar, this can happen when sending to a greylisting
535 server, but other circumstances could also provoke similar problems.
536 I have changed the default so that the retry time for these errors is now
537 based a combination of the sender and recipient addresses. This change
538 can be overridden by setting address_retry_include_sender=false in the
541 PH/37 For LMTP over TCP/IP (the smtp transport), error responses from the
542 remote server are returned as part of bounce messages. This was not
543 happening for LMTP over a pipe (the lmtp transport), but now it is the
544 same for both kinds of LMTP.
546 PH/38 Despite being documented as not happening, Exim was rewriting addresses
547 in header lines that were in fact CNAMEs. This is no longer the case.
549 PH/39 If -R or -S was given with -q<time>, the effect of -R or -S was ignored,
550 and queue runs started by the daemon processed all messages. This has
551 been fixed so that -R and -S can now usefully be given with -q<time>.
553 PH/40 Import PCRE release 6.7 (fixes some bugs).
555 PH/41 Add bitwise logical operations to eval (courtesy Brad Jorsch).
557 PH/42 Give an error if -q is specified more than once.
559 PH/43 Renamed the variables $interface_address and $interface_port as
560 $received_ip_address and $received_port, to make it clear that these
561 values apply to message reception, and not to the outgoing interface when
562 a message is delivered. (The old names remain recognized, of course.)
564 PH/44 There was no timeout on the connect() call when using a Unix domain
565 socket in the ${readsocket expansion. There now is.
567 PH/45 Applied a modified version of Brad Jorsch's patch to allow "message" to
568 be meaningful with "accept".
570 SC/01 Eximstats V1.43
571 Bug fix for V1.42 with -h0 specified. Spotted by Chris Lear.
573 SC/02 Eximstats V1.44
574 Use a glob alias rather than an array ref in the generated
575 parser. This improves both readability and performance.
577 SC/03 Eximstats V1.45 (Marco Gaiarin / Steve Campbell)
578 Collect SpamAssassin and rejection statistics.
579 Don't display local sender or destination tables unless
580 there is data to show.
581 Added average volumes into the top table text output.
583 SC/04 Eximstats V1.46
584 Collect data on the number of addresses (recipients)
585 as well as the number of messages.
587 SC/05 Eximstats V1.47
588 Added 'Message too big' to the list of mail rejection
589 reasons (thanks to Marco Gaiarin).
591 SC/06 Eximstats V1.48
592 Mainlog lines which have GMT offsets and are too short to
593 have a flag are now skipped.
595 SC/07 Eximstats V1.49 (Alain Williams)
596 Added the -emptyok flag.
598 SC/08 Eximstats V1.50
599 Fixes for obtaining the IP address from reject messages.
601 JJ/03 exipick.20061117.2, made header handling as similar to exim as possible
602 (added [br]h_ prefixes, implemented RFC2047 decoding. Fixed
603 whitesspace changes from 4.64-PH/27
605 JJ/04 exipick.20061117.2, fixed format and added $message_headers_raw to
608 JJ/05 exipick.20061117.2, bug fixes (error out sooner when invalid criteria
609 are found, allow negative numbers in numeric criteria)
611 JJ/06 exipick.20061117.2, added new $message_body_missing variable
613 JJ/07 exipick.20061117.2, added $received_ip_address and $received_port
614 to match changes made in 4.64-PH/43
616 PH/46 Applied Jori Hamalainen's patch to add features to exiqsumm.
618 PH/47 Put in an explicit test for a DNS lookup of an address record where the
619 "domain" is actually an IP address, and force a failure. This locks out
620 those revolvers/nameservers that support "A-for-A" lookups, in
621 contravention of the specifications.
623 PH/48 When a host name was looked up from an IP address, and the subsequent
624 forward lookup of the name timed out, the host name was left in
625 $sender_host_name, contrary to the specification.
627 PH/49 Although default lookup types such as lsearch* or cdb*@ have always been
628 restricted to single-key lookups, Exim was not diagnosing an error if
629 * or *@ was used with a query-style lookup.
631 PH/50 Increased the value of DH_BITS in tls-gnu.c from 768 to 1024.
633 MH/01 local_scan ABI version incremented to 1.1. It should have been updated
634 long ago, but noone interested enough thought of it. Let's just say that
635 the "1.1" means that there are some new functions that weren't there at
636 some point in the past.
638 PH/51 Error processing for expansion failure of helo_data from an smtp
639 transport during callout processing was broken.
641 PH/52 Applied John Jetmore's patch to allow tls-on-connect and STARTTLS to be
642 tested/used via the -bh/-bhc/-bs options.
644 PH/53 Added missing "#include <time.h>" to pcre/pcretest.c (this was a PCRE
645 bug, fixed in subsequent PCRE releases).
647 PH/54 Applied Robert Bannocks' patch to avoid a problem with references that
648 arises when using the Solaris LDAP libraries (but not with OpenLDAP).
650 PH/55 Check for a ridiculously long file name in exim_dbmbuild.
656 SC/01 Use a glob alias rather than an array ref in eximstats generated
657 parser. This improves both readability and performance.
659 SC/02 Collect SpamAssassin and rejection statistics in eximstats.
660 Don't display local sender or destination tables in eximstats unless
661 there is data to show.
662 Added average volumes into the eximstats top table text output.
664 SC/03 Collect data on the number of addresses (recipients) as well
665 as the number of messages in eximstats.
667 TF/01 Correct an error in the documentation for the redirect router. Exim
668 does (usually) call initgroups() when daemonizing.
670 TF/02 Call initgroups() when dropping privilege in exim.c, so that Exim runs
671 with consistent privilege compared to when running as a daemon.
673 TF/03 Note in the spec that $authenticated_id is not set for local
674 submissions from trusted users.
676 TF/04 The ratelimit per_rcpt option now works correctly in acl_not_smtp.
677 Thanks to Dean Brooks <dean@iglou.com> for the patch.
679 TF/05 Make it easier to get SMTP authentication and TLS/SSL support working
680 by adding some example configuration directives to the default
681 configuration file. A little bit of work is required to uncomment the
682 directives and define how usernames and passwords are checked, but
683 there is now a framework to start from.
685 PH/01 Added #define LDAP_DEPRECATED 1 to ldap.c because some of the "old"
686 functions that Exim currently uses aren't defined in ldap.h for OpenLDAP
687 without this. I don't know how relevant this is to other LDAP libraries.
689 PH/02 Add the verb name to the "unknown ACL verb" error.
691 PH/03 Magnus Holmgren's patch for filter_prepend_home.
693 PH/03 Fixed Bugzilla #101: macro definition between ACLs doesn't work.
695 PH/04 Applied Magnus Holmgren's patch to fix Bugzilla #98: transport's home
696 directory not expanded when it should be if an expanded home directory
697 was set for the address (which is overridden by the transport).
699 PH/05 Applied Alex Kiernan's patch to fix Bugzilla #99: a problem with
702 PH/06 Added acl_not_smtp_start, based on Johannes Berg's patch, and set the
703 bit to forbid control=suppress_local_fixups in the acl_not_smtp ACL,
704 because it is too late at that time, and has no effect.
706 PH/07 Changed ${quote_pgsql to quote ' as '' instead of \' because of a
707 security issue with \' (bugzilla #107). I could not use the
708 PQescapeStringConn() function, because it needs a PGconn value as one of
711 PH/08 When testing addresses using -bt, indicate those final addresses that
712 are duplicates that would not cause an additional delivery. At least one
713 person was confused, thinking that -bt output corresponded to deliveries.
714 (Suppressing duplicates isn't a good idea as you lose the information
715 about possibly different redirections that led to the duplicates.)
717 PH/09 Applied patch from Erik to use select() instead of poll() in spam.c on
718 systems where poll() doesn't work, in particular OS X.
720 PH/10 Added more information to debugging output for retry time not reached.
722 PH/11 Applied patch from Arkadiusz Miskiewicz to apply a timeout to read
723 operations in malware.c.
725 PH/12 Applied patch from Magnus Holmgren to include the "h" tag in Domain Keys
728 PH/13 If write_rejectlog was set false when logging was sent to syslog with
729 syslog_duplication set false, log lines that would normally be written
730 both the the main log and to the reject log were not written to syslog at
733 PH/14 In the default configuration, change the use of "message" in ACL warn
734 statements to "add_header".
736 PH/15 Diagnose a filter syntax error for "seen", "unseen", or "noerror" if not
737 not followed by a command (e.g. "seen endif").
739 PH/16 Recognize SMTP codes at the start of "message" in ACLs and after :fail:
740 and :defer: in a redirect router. Add forbid_smtp_code to suppress the
743 PH/17 Added extra conditions to the default value of delay_warning_condition
747 { !eq{$h_list-id:$h_list-post:$h_list-subscribe:}{} } \
748 { match{$h_precedence:}{(?i)bulk|list|junk} } \
749 { match{$h_auto-submitted:}{(?i)auto-generated|auto-replied} } \
752 The Auto-Submitted: and various List- headers are standardised, whereas I
753 don't think Precedence: ever was.
755 PH/18 Refactored debugging code in route_finduser() to show more information,
756 in particular, the error code if getpwnam() issues one.
758 PH/19 Added PQsetClientEncoding(conn, "SQL_ASCII") to the pgsql code module.
759 This is apparently needed in addition to the PH/07 change above to avoid
760 any possible encoding problems.
762 PH/20 Perl can change the locale. Exim was resetting it after a ${perl call,
763 but not after initializing Perl.
765 PH/21 Added a call to PQsetNoticeProcessor() to catch pgsql "notices" and
766 output them only if debugging. By default they are written stderr,
767 apparently, which is not desirable.
769 PH/22 Added Alain Williams' LDAP patch to support setting REFERRALS=off on
772 JJ/01 exipick: added --reverse (and -R synonym), --random, --size, --sort and
775 JJ/02 exipick: rewrote --help documentation to hopefully make more clear.
777 PH/23 Made -oMaa and -oMt work with -bh and -bs to pretend the connection is
778 authenticated or an ident call has been made. Suppress the default
779 values for $authenticated_id and $authenticated_sender (but permit -oMai
780 and -oMas) when testing with -bh.
782 PH/24 Re-jigged the order of the tests in the default configuration so that the
783 tests for valid domains and recipients precede the DNS black list and CSA
784 tests, on the grounds that those ones are more expensive.
786 PH/25 Exim was not testing for a space following SMTP commands such as EHLO
787 that require one. Thus, EHLORHUBARB was interpreted as a valid command.
788 This bug exists in every version of Exim that I still have, right back to
791 PH/26 (n)wildlsearch lookups are documented as being done case-insensitively.
792 However, an attempt to turn on case-sensitivity in a regex key by
793 including (?-i) didn't work because the subject string was already
794 lowercased, and the effects were non-intuitive. It turns out that a
795 one-line patch can be used to allow (?-i) to work as expected.
801 TF/01 Fix the add_header change below (4.61 PH/55) which had a bug that (amongst
802 other effects) broke the use of negated acl sub-conditions.
804 PH/01 ${readsocket now supports Internet domain sockets (modified John Jetmore
807 PH/02 When tcp-wrappers is called from Exim, it returns only "deny" or "allow".
808 "Deny" causes Exim to reject the incoming connection with a 554 error.
809 Unfortunately, if there is a major crisis, such as a disk failure,
810 tcp-wrappers gives "deny", whereas what one would like would be some
811 kind of temporary error. A kludge has been added to help with this.
812 Before calling hosts_ctl(), errno is set zero. If the result is "deny", a
813 554 error is used if errno is still zero or contains ENOENT (which occurs
814 if either of the /etc/hosts.{allow,deny} files is missing). Otherwise, a
817 PH/03 Add -lutil to the default FreeBSD LIBS setting.
819 PH/04 Change PH/19 for 4.61 was too wide. It should not be applied to host
820 errors. Otherwise a message that provokes a temporary error (when other
821 messages do not) can cause a whole host to time out.
823 PH/05 Batch deliveries by appendfile and pipe transports did not work when the
824 addresses were routed directly to files or pipes from a redirect router.
825 File deliveries just didn't batch; pipe deliveries might have suffered
828 PH/06 A failure to get a lock for a hints database would erroneously always say
829 "Failed to get write lock", even when it was really a read lock.
831 PH/07 The appendfile transport was creating MBX lock files with a fixed mode
832 of 0600. This has been changed to use the value of the lockfile_mode
833 option (which defaults to 0600).
835 PH/08 Applied small patch from the Sieve maintainer.
837 PH/09 If maildir_quota_directory_regex was set to exclude (say) the .Trash
838 folder from quota calculations, a direct delivery into this folder messed
839 up the contents of the maildirsize file. This was because the regex was
840 used only to exclude .Trash (or whatever) when the size of the mailbox
841 was calculated. There was no check that a delivery was happening into an
842 excluded directory. This bug has been fixed by ignoring all quota
843 processing for deliveries into excluded directories.
845 PH/10 Added the maildirfolder_create_regex option to appendfile.
851 PH/01 The code for finding all the local interface addresses on a FreeBSD
852 system running IPv6 was broken. This may well have applied to all BSD
853 systems, as well as to others that have similar system calls. The broken
854 code found IPv4 interfaces correctly, but gave incorrect values for the
855 IPv6 interfaces. In particular, ::1 was not found. The effect in Exim was
856 that it would not match correctly against @[] and not recognize the IPv6
859 PH/02 The ipliteral router was not recognizing addresses of the form user@
860 [ipv6:....] because it didn't know about the "ipv6:" prefix.
862 PH/03 Added disable_ipv6.
864 PH/04 Changed $reply_address to use the raw form of the headers instead of the
865 decoded form, because it is most often used to construct To: headers
866 lines in autoreplies, and the decoded form may well be syntactically
867 invalid. However, $reply_address has leading white space removed, and all
868 newlines turned into spaces so that the autoreply transport does not
871 PH/05 If group was specified without a user on a router, and no group or user
872 was specified on a transport, the group from the router was ignored.
874 PH/06 Increased the number of ACL variables to 20 of each type, and arranged
875 for visible compile-time settings that can be used to change these
876 numbers, for those that want even more. Backwards compatibility with old
877 spool files has been maintained. However, going back to a previous Exim
878 release will lost any variables that are in spool files.
880 PH/07 Two small changes when running in the test harness: increase delay when
881 passing a TCP/IP connection to a new process, in case the original
882 process has to generate a bounce, and remove special handling of
883 127.0.0.2 (sic), which is no longer necessary.
885 PH/08 Changed debug output of dbfn_open() flags from numbers to names, so as to
886 be the same on different OS.
888 PH/09 Moved a debug statement in filter processing to avoid a race problem when
891 JJ/01 exipick: fixed bug where -b (brief) output option showed "Vars:"
892 whether --show-vars was specified or not
894 JJ/02 exipick: Added support for new ACL variable spool format introduced
897 PH/10 Fixed another bug related to PH/04 above: if an incoming message had a
898 syntactically invalid From: or Reply-to: line, and a filter used this to
899 generate an autoreply, and therefore failed to obtain an address for the
900 autoreply, Exim could try to deliver to a non-existent relative file
901 name, causing unrelated and misleading errors. What now happens is that
902 it logs this as a hard delivery error, but does not attempt to create a
905 PH/11 The exinext utility has a -C option for testing purposes, but although
906 the given file was scanned by exinext itself; it wasn't being passed on
907 when Exim was called.
909 PH/12 In the smtp transport, treat an explicit ECONNRESET error the same as
910 an end-of-file indication when reading a command response.
912 PH/13 Domain literals for IPv6 were not recognized unless IPv6 support was
913 compiled. In many other places in Exim, IPv6 addresses are always
914 recognized, so I have changed this. It also means that IPv4 domain
915 literals of the form [IPV4:n.n.n.n] are now always recognized.
917 PH/14 When a uid/gid is specified for the queryprogram router, it cannot be
918 used if the router is not running as root, for example, when verifying at
919 ACL time, or when using -bh. The debugging output from this situation was
920 non-existent - all you got was a failure to exec. I have made two
923 (a) Failures to set uid/gid, the current directory, or a process leader
924 in a subprocess such as that created by queryprogram now generate
925 suitable debugging ouput when -d is set.
927 (b) The queryprogram router detects when it is not running as root,
928 outputs suitable debugging information if -d is set, and then runs
929 the subprocess without attempting to change uid/gid.
931 PH/15 Minor change to Makefile for building test_host (undocumented testing
934 PH/16 As discussed on the list in Nov/Dec: Exim no longer looks at the
935 additional section of a DNS packet that returns MX or SRV records.
936 Instead, it always explicitly searches for A/AAAA records. This avoids
937 major problems that occur when a DNS server includes only records of one
938 type (A or AAAA) in an MX/SRV packet. A byproduct of this change has
939 fixed another bug: if SRV records were looked up and the corresponding
940 address records were *not* found in the additional section, the port
941 values from the SRV records were lost.
943 PH/17 If a delivery to a pipe, file, or autoreply was deferred, Exim was not
944 using the correct key (the original address) when searching the retry
945 rules in order to find which one to use for generating the retry hint.
947 PH/18 If quota_warn_message contains a From: header, Exim now refrains from
948 adding the default one. Similarly, if it contains a Reply-To: header, the
949 errors_reply_to option, if set, is not used.
951 PH/19 When calculating a retry time, Exim used to measure the "time since
952 failure" by looking at the "first failed" field in the retry record. Now
953 it does not use this if it is later than than the arrival time of the
954 message. Instead it uses the arrival time. This makes for better
955 behaviour in cases where some deliveries succeed, thus re-setting the
956 "first failed" field. An example is a quota failure for a huge message
957 when small messages continue to be delivered. Without this change, the
958 "time since failure" will always be short, possible causing more frequent
959 delivery attempts for the huge message than are intended.
960 [Note: This change was subsequently modified - see PH/04 for 4.62.]
962 PH/20 Added $auth1, $auth2, $auth3 to contain authentication data (as well as
963 $1, $2, $3) because the numerical variables can be reset during some
964 expansion items (e.g. "match"), thereby losing the authentication data.
966 PH/21 Make -bV show the size of off_t variables so that the test suite can
967 decide whether to run tests for quotas > 2G.
969 PH/22 Test the values given for quota, quota_filecount, quota_warn_threshold,
970 mailbox_size, and mailbox_filecount in the appendfile transport. If a
971 filecount value is greater than 2G or if a quota value is greater than 2G
972 on a system where the size of off_t is not greater than 4, a panic error
975 PH/23 When a malformed item such as 1.2.3/24 appears in a host list, it can
976 never match. The debug and -bh output now contains an explicit error
977 message indicating a malformed IPv4 address or mask.
979 PH/24 An host item such as 1.2.3.4/abc was being treated as the IP address
980 1.2.3.4 without a mask. Now it is not recognized as an IP address, and
983 PH/25 Do not write to syslog when running in the test harness. The only
984 occasion when this arises is a failure to open the main or panic logs
985 (for which there is an explicit test).
987 PH/26 Added the /no_tell option to "control=freeze".
989 PH/27 If a host name lookup failed very early in a connection, for example, if
990 the IP address matched host_lookup and the reverse lookup yielded a name
991 that did not have a forward lookup, an error message of the form "no IP
992 address found for host xxx.xxx.xxx (during SMTP connection from NULL)"
993 could be logged. Now it outputs the IP address instead of "NULL".
995 PH/28 An enabling patch from MH: add new function child_open_exim2() which
996 allows the sender and the authenticated sender to be set when
997 submitting a message from within Exim. Since child_open_exim() is
998 documented for local_scan(), the new function should be too.
1000 PH/29 In GnuTLS, a forced expansion failure for tls_privatekey was not being
1001 ignored. In both GnuTLS and OpenSSL, an expansion of tls_privatekey that
1002 results in an empty string is now treated as unset.
1004 PH/30 Fix eximon buffer overflow bug (Bugzilla #73).
1006 PH/31 Added sender_verify_fail logging option.
1008 PH/32 In November 2003, the code in Exim that added an empty Bcc: header when
1009 needed by RFC 822 but not by RFC 2822 was commented out. I have now
1010 tidied the source and removed it altogether.
1012 PH/33 When a queue run was abandoned because the load average was too high, a
1013 log line was always written; now it is written only if the queue_run log
1014 selector is set. In addition, the log line for abandonment now contains
1015 information about the queue run such as the pid. This is always present
1016 in "start" and "stop" lines but was omitted from the "abandon" line.
1018 PH/34 Omit spaces between a header name and the colon in the error message that
1019 is given when verify = headers_syntax fails (if there are lots of them,
1020 the message gets confusing).
1022 PH/35 Change the default for dns_check_names_pattern to allow slashes within
1023 names, as there are now some PTR records that contain slashes. This check
1024 is only to protect against broken name servers that fall over on strange
1025 characters, so the fact that it applies to all lookups doesn't matter.
1027 PH/36 Now that the new test suite is complete, we can remove some of the
1028 special code in Exim that was needed for the old test suite. For example,
1029 sorting DNS records because real resolvers return them in an arbitrary
1030 order. The new test suite's fake resolver always returns records in the
1033 PH/37 When running in the test harness, use -odi for submitted messages (e.g.
1034 bounces) except when queue_only is set, to avoid logging races between
1035 the different processes.
1037 PH/38 Panic-die if .include specifies a non-absolute path.
1039 PH/39 A tweak to the "H" retry rule from its user.
1041 JJ/03 exipick: Removed parentheses from 'next' and 'last' calls that specified
1042 a label. They prevented compilation on older perls.
1044 JJ/04 exipick: Refactored code to prevent implicit split to @_ which caused
1045 a warning to be raised on newish perls.
1047 JJ/05 exipick: Fixed bug where -bpc always showed a count of all messages
1048 on queue. Changes to match documented behaviour of showing count of
1049 messages matching specified criteria.
1051 PH/40 Changed the default ident timeout from 30s to 5s.
1053 PH/41 Added support for the use of login_cap features, on those BSD systems
1054 that have them, for controlling the resources used by pipe deliveries.
1056 PH/42 The content-scanning code uses fopen() to create files in which to put
1057 message data. Previously it was not paying any attention to the mode of
1058 the files. Exim runs with umask(0) because the rest of the code creates
1059 files with open(), and sets the required mode explicitly. Thus, these
1060 files were ending up world-writeable. This was not a big issue, because,
1061 being within the spool directory, they were not world-accessible. I have
1062 created a function called modefopen, which takes an additional mode
1063 argument. It sets umask(777), creates the file, chmods it to the required
1064 mode, then resets the umask. All the relevant calls to fopen() in the
1065 content scanning code have been changed to use this function.
1067 PH/43 If retry_interval_max is set greater than 24 hours, it is quietly reset
1068 to 24 hours. This avoids potential overflow problems when processing G
1069 and H retry rules. I suspect nobody ever tinkers with this value.
1071 PH/44 Added STRIP_COMMAND=/usr/bin/strip to the FreeBSD Makefile.
1073 PH/45 When the plaintext authenticator is running as a client, the server's
1074 challenges are checked to ensure they are valid base64 strings. By
1075 default, the authentication attempt is cancelled if an invalid string is
1076 received. Setting client_ignore_invalid_base64 true ignores these errors.
1077 The decoded challenge strings are now placed in $auth1, $auth2, etc. as
1078 they are received. Thus, the responses can be made to depend on the
1079 challenges. If an invalid string is ignored, an empty string is placed in
1082 PH/46 Messages that are created by the autoreply transport now contains a
1083 References: header, in accordance with RFCs 2822 and 3834.
1085 PH/47 Added authenticated_sender_force to the smtp transport.
1087 PH/48 The ${prvs expansion was broken on systems where time_t was long long.
1089 PH/49 Installed latest patch from the Sieve maintainer.
1091 PH/50 When an Exim quota was set without a file count quota, and mailbox_size
1092 was also set, the appendfile transport was unnecessarily scanning a
1093 directory of message files (e.g. for maildir delivery) to find the count
1094 of files (along with the size), even though it did not need this
1095 information. It now does the scan only if it needs to find either the
1096 size of the count of files.
1098 PH/51 Added ${time_eval: to convert Exim time strings into seconds.
1100 PH/52 Two bugs concerned with error handling when the smtp transport is
1103 (i) Exim was not creating retry information for temporary errors given
1104 for individual recipients after the DATA command when the smtp transport
1105 was used in LMTP mode. This meant that they could be retried too
1106 frequently, and not timed out correctly.
1108 (ii) Exim was setting the flag that allows error details to be returned
1109 for LMTP errors on RCPT commands, but not for LMTP errors for individual
1110 recipients that were returned after the DATA command.
1112 PH/53 This is related to PH/52, but is more general: for any failing address,
1113 when detailed error information was permitted to be returned to the
1114 sender, but the error was temporary, then after the final timeout, only
1115 "retry timeout exceeded" was returned. Now it returns the full error as
1116 well as "retry timeout exceeded".
1118 PH/54 Added control=allow_auth_unadvertised, as it seems there are clients that
1119 do this, and (what is worse) MTAs that accept it.
1121 PH/55 Added the add_header modified to ACLs. The use of "message" with "warn"
1122 will now be deprecated.
1124 PH/56 New os.c-cygwin from the Cygwin maintainer.
1126 JJ/06 exipick: added --unsorted option to allow unsorted output in all output
1127 formats (previously only available in exim formats via -bpr, -bpru,
1128 and -bpra. Now also available in native and exiqgrep formats)
1130 JJ/07 exipick: added --freeze and --thaw options to allow faster interaction
1131 with very large, slow to parse queues
1133 JJ/08 exipick: added ! as generic prefix to negate any criteria format
1135 JJ/09 exipick: miscellaneous performance enhancements (~24% improvements)
1137 PH/57 Tidies in SMTP dialogue display in debug output: (i) It was not showing
1138 responses to authentication challenges, though it was showing the
1139 challenges; (ii) I've removed the CR characters from the debug output for
1142 PH/58 Allow for the insertion of a newline as well as a space when a string
1143 is turned into more than one encoded-word during RFC 2047 encoding. The
1144 Sieve code now uses this.
1146 PH/59 Added the following errors that can be detected in retry rules: mail_4xx,
1147 data_4xx, lost_connection, tls_required.
1149 PH/60 When a VRFY deferred or FAILED, the log message rather than the user
1150 message was being sent as an SMTP response.
1152 PH/61 Add -l and -k options to exicyclog.
1154 PH/62 When verifying, if an address was redirected to one new address, so that
1155 verification continued, and the new address failed or deferred after
1156 having set something in $address_data, the value of $address_data was not
1157 passed back to the ACL. This was different to the case when no
1158 redirection occurred. The value is now passed back in both cases.
1160 PH/63 Changed the macro HAVE_LOGIN_CAP (see PH/41 for this release above) to
1161 HAVE_SETCLASSRESOURCES because there are different APIs in use that all
1162 use login_cap.h, so on its own it isn't the distinguishing feature. The
1163 new name refers directly to the setclassresources() function.
1165 PH/65 Added configuration files for NetBSD3.
1167 PH/66 Updated OS/Makefile-HP-UX for gcc 4.1.0 with HP-UX 11.
1169 PH/67 Fixed minor infelicity in the sorting of addresses to ensure that IPv6
1170 is preferred over IPv4.
1172 PH/68 The bounce_return_message and bounce_return_body options were not being
1173 honoured for bounces generated during the reception of non-SMTP messages.
1174 In particular, this applied to messages rejected by the ACL. This bug has
1175 been fixed. However, if bounce_return_message is true and bounce_return_
1176 body is false, the headers that are returned for a non-SMTP message
1177 include only those that have been read before the error was detected.
1178 (In the case of an ACL rejection, they have all been read.)
1180 PH/69 The HTML version of the specification is now built in a directory called
1181 spec_html instead of spec.html, because the latter looks like a path with
1182 a MIME-type, and this confuses some software.
1184 PH/70 Catch two compiler warnings in sieve.c.
1186 PH/71 Fixed an obscure and subtle bug (thanks Alexander & Matthias). The
1187 function verify_get_ident() calls ip_connect() to connect a socket, but
1188 if the "connect()" function timed out, ip_connect() used to close the
1189 socket. However, verify_get_ident() also closes the socket later, and in
1190 between Exim writes to the log, which may get opened at this point. When
1191 the socket was closed in ip_connect(), the log could get the same file
1192 descriptor number as the socket. This naturally causes chaos. The fix is
1193 not to close the socket in ip_connect(); the socket should be closed by
1194 the function that creates it. There was only one place in the code where
1195 this was missing, in the iplookup router, which I don't think anybody now
1196 uses, but I've fixed it anyway.
1198 PH/72 Make dns_again_means_nonexist apply to lookups using gethostbyname() as
1199 well as to direct DNS lookups. Otherwise the handling of names in host
1200 lists is inconsistent and therefore confusing.
1206 PH/01 Two changes to the default runtime configuration:
1208 (1) Move the checks for relay_from_hosts and authenticated clients from
1209 after to before the (commented out) DNS black list checks.
1211 (2) Add control=submission to the relay_from_hosts and authenticated
1212 clients checks, on the grounds that messages accepted by these
1213 statements are most likely to be submissions.
1215 PH/02 Several tidies to the handling of ${prvs and ${prvscheck:
1217 (1) Generate an error if the third argument for the ${prvs expansion is
1220 (2) Treat a missing third argument of ${prvscheck as if it were an empty
1223 (3) Reset the variables that are obtained from the first argument of
1224 ${prvscheck and used in the second argument before leaving the code,
1225 because their memory is reclaimed, so using them afterwards may do
1228 (4) Tidy up the code for expanding the arguments of ${prvscheck one by
1229 one (it's much easier than Tom thought :-).
1231 (5) Because of (4), we can now allow for the use of $prvscheck_result
1232 inside the third argument.
1234 PH/03 For some reason, the default setting of PATH when running a command from
1235 a pipe transport was just "/usr/bin". I have changed it to
1238 PH/04 SUPPORT_TRANSLATE_IP_ADDRESS and MOVE_FROZEN_MESSAGES did not cause
1239 anything to be listed in the output from -bV.
1241 PH/05 When a filter generated an autoreply, the entire To: header line was
1242 quoted in the delivery log line, like this:
1244 => >A.N.Other <ano@some.domain> <original@ddress> ...
1246 This has been changed so that it extracts the operative address. There
1247 may be more than one such address. If so, they are comma-separated, like
1250 => >ano@some.domain,ona@other.domain <original@ddress> ...
1252 PH/06 When a client host used a correct literal IP address in a HELO or EHLO
1253 command, (for example, EHLO [1.2.3.4]) and the client's IP address was
1254 not being looked up in the rDNS to get a host name, Exim was showing the
1255 IP address twice in Received: lines, even though the IP addresses were
1256 identical. For example:
1258 Received: from [1.2.3.4] (helo=[1.2.3.4])
1260 However, if the real host name was known, it was omitting the HELO data
1261 if it matched the actual IP address. This has been tidied up so that it
1262 doesn't show the same IP address twice.
1264 PH/07 When both +timestamp and +memory debugging was on, the value given by
1265 $tod_xxx expansions could be wrong, because the tod_stamp() function was
1266 called by the debug printing, thereby overwriting the timestamp buffer.
1267 Debugging no longer uses the tod_stamp() function when +timestamp is set.
1269 PH/08 When the original message was included in an autoreply transport, it
1270 always said "this is a copy of the message, including all the headers",
1271 even if body_only or headers_only was set. It now gives an appropriate
1274 PH/09 Applied a patch from the Sieve maintainer which:
1276 o fixes some comments
1277 o adds the (disabled) notify extension core
1278 o adds some debug output for the result of if/elsif tests
1279 o points to the current vacation draft in the documentation
1280 and documents the missing references header update
1284 o fixes a bug in processing the envelope test (when testing
1285 multiple envelope elements, the last element determinted the
1288 PH/10 Exim was violating RFC 3834 ("Recommendations for Automatic Responses to
1289 Electronic Mail") by including:
1291 Auto-submitted: auto-generated
1293 in the messages that it generates (bounce messages and others, such as
1294 warnings). In the case of bounce messages for non-SMTP mesages, there was
1295 also a typo: it was using "Auto_submitted" (underscore instead of
1296 hyphen). Since every message generated by Exim is necessarily in response
1297 to another message, thes have all been changed to:
1299 Auto-Submitted: auto-replied
1301 in accordance with these statements in the RFC:
1303 The auto-replied keyword:
1305 - SHOULD be used on messages sent in direct response to another
1306 message by an automatic process,
1308 - MUST NOT be used on manually-generated messages,
1310 - MAY be used on Delivery Status Notifications (DSNs) and Message
1311 Disposition Notifications (MDNs),
1313 - MUST NOT be used on messages generated by automatic or periodic
1314 processes, except for messages which are automatic responses to
1317 PH/11 Added "${if def:sender_address {(envelope-from <$sender_address>)\n\t}}"
1318 to the default Received: header definition.
1320 PH/12 Added log selector acl_warn_skipped (default on).
1322 PH/13 After a successful wildlsearch lookup, discard the values of numeric
1323 variables because (a) they are in the wrong storage pool and (b) even if
1324 they were copied, it wouldn't work properly because of the caching.
1326 PH/14 Add check_rfc2047_length to disable enforcement of RFC 2047 length
1327 checking when decoding. Apparently there are clients that generate
1328 overlong encoded strings. Why am I not surprised?
1330 PH/15 If the first argument of "${if match_address" was not empty, but did not
1331 contain an "@" character, Exim crashed. Now it writes a panic log message
1332 and treats the condition as false.
1334 PH/16 In autoreply, treat an empty string for "once" the same as unset.
1336 PH/17 A further patch from the Sieve maintainer: "Introduce the new Sieve
1337 extension "envelope-auth". The code is finished and in agreement with
1338 other implementations, but there is no documentation so far and in fact,
1339 nobody wrote the draft yet. This extension is currently #undef'ed, thus
1340 not changing the active code.
1342 Print executed "if" and "elsif" statements when debugging is used. This
1343 helps a great deal to understand what a filter does.
1345 Document more things not specified clearly in RFC3028. I had all this
1346 sorted out, when out of a sudden new issues came to my mind. Oops."
1348 PH/18 Exim was not recognizing the "net-" search type prefix in match_ip lists
1351 PH/19 Exim expands the IPv6 address given to -bh to its full non-abbreviated
1352 canonical form (as documented). However, after a host name lookup from
1353 the IP address, check_host() was doing a simple string comparison with
1354 addresses acquired from the DNS when checking that the found name did
1355 have the original IP as one of its addresses. Since any found IPv6
1356 addresses are likely to be in abbreviated form, the comparison could
1357 fail. Luckily, there already exists a function for doing the comparison
1358 by converting both addresses to binary, so now that is used instead of
1359 the text comparison.
1361 PH/20 There was another similar case to PH/19, when a complete host name was
1362 given in a host list; looking up its IP address could give an abbreviated
1363 form, whereas the current host's name might or might not be abbreviated.
1364 The same fix has been applied.
1370 PH/01 The ${base62: operator adjusted itself to base 36 when BASE_62 was
1371 set to 36 (for Darwin and Cygwin), but the ${base62d: operator did not.
1374 PH/02 Two minor problems detected in Cygwin: the os.{c,h} files had lost */ on
1375 the CVS lines, and there was a missing #if HAVE_IPV6 in host.c.
1377 PH/03 Typo: missing ".o" in src/pcre/Makefile.
1379 PH/04 Tighten up "personal" tests: Instead of testing for any "List-"
1380 header line, restrict the check to what is listed in RFCs 2369 and 2929.
1381 Also, for "Auto-Submitted", treat anything other than "no" as
1382 non-personal, in accordance with RFC 3834. (Previously it treated
1383 anything starting "auto-" as non-personal.)
1385 TF/01 The control=submission/name=... option had a problem with syntax
1386 errors if the name included a slash character. The /name= option
1387 now slurps the rest of the string, so it can include any characters
1388 but it must come last in the list of options (after /sender_retain
1391 PH/05 Some modifications to the interface to the fake nameserver for the new
1399 TK/01 Added the "success_on_redirect" address verification option. See
1400 NewStuff for rationale and an example.
1402 PH/01 Added support for SQLite, basic code supplied by David Woodhouse.
1404 PH/02 Patch to exigrep to allow it to work on syslog lines.
1406 PH/03 When creating an mbox file for a virus/spam scan, use fseek() instead of
1407 fread() to skip over the body file's header line, because in Cygwin the
1408 header line is locked and is inaccessible.
1410 PH/04 Added $message_exim_id, ultimately to replace $message_id (they will both
1411 co-exist for some time) to make it clear that it is the Exim ID that is
1412 referenced, not the Message-ID: header line.
1414 PH/05 Replaced all Tom's calls to snprintf() with calls to the internal
1415 string_format() function, because snprintf() does not exist on all
1418 PH/06 The use of forbid_filter_existstest now also locks out the use of the
1419 ${stat: expansion item.
1421 PH/07 Changed "SMTP protocol violation: synchronization error" into "SMTP
1422 protocol synchronization error", to keep the pedants happy.
1424 PH/08 Arrange for USE_INET_NTOA_FIX to be set in config.h for AIX systems as
1425 well as for IRIX systems, when gcc is being used. See the host.c source
1428 PH/09 Installed latest Cygwin configuration files from the Cygwin maintainer.
1430 PH/10 Named domain lists were not working if used in a queue_smtp_domains
1433 PH/11 Added support for the IGNOREQUOTA extension to LMTP, both to the lmtp
1434 transport and to the smtp transport in LMTP mode.
1436 TK/02 Remove one case of BASE64 error detection FTTB (undocumented anyway).
1438 PH/12 There was a missing call to search_tidyup() before the fork() in rda.c to
1439 run a filter in a subprocess. This could lead to confusion in subsequent
1440 lookups in the parent process. There should also be a search_tidyup() at
1441 the end of the subprocess.
1443 PH/13 Previously, if "verify = helo" was set in an ACL, the condition was true
1444 only if the host matched helo_try_verify_hosts, which caused the
1445 verification to occur when the EHLO/HELO command was issued. The ACL just
1446 tested the remembered result. Now, if a previous verification attempt has
1447 not happened, "verify = helo" does it there and then.
1449 JJ/01 exipick: added $message_exim_id variable (see 4.53-PH/04)
1451 TK/03 Fix log output including CR from clamd.
1453 PH/14 A reference to $reply_address when Reply-to: was empty and From: did not
1454 exist provoked a memory error which could cause a segfault.
1456 PH/15 Installed PCRE 6.2
1458 PH/17 Defined BIND_8_COMPAT in the Darwin os.h file.
1460 PH/18 Reversed 4.52/PH/17 because the HP-UX user found it wasn't the cause
1461 of the problem. Specifically, suggested +O2 rather than +O1 for the
1464 PH/19 Added sqlite_lock_timeout option (David Woodhouse's patch).
1466 PH/20 If a delivery was routed to a non-standard port by means of an SRV
1467 record, the port was not correctly logged when the outgoing_port log
1468 selector was set (it logged the transort's default port).
1470 PH/21 Added support for host-specific ports to manualroute, queryprogram,
1471 fallback_hosts, and "hosts" in the smtp transport.
1473 PH/22 If the log selector "outgoing_port" is set, the port is now also given on
1474 host errors such as "Connection refused".
1476 PH/23 Applied a patch to fix problems with exim-4.52 while doing radius
1477 authentication with radiusclient 0.4.9:
1479 - Error returned from rc_read_config was caught wrongly
1480 - Username/password not passed on to radius server due to wrong length.
1482 The presumption is that some radiusclient API changes for 4.51/PH/17
1483 were not taken care of correctly. The code is still untested by me (my
1484 Linux distribution still has 0.3.2 of radiusclient), but it was
1485 contributed by a Radius user.
1487 PH/24 When doing a callout, the value of $domain wasn't set correctly when
1488 expanding the "port" option of the smtp transport.
1490 TK/04 MIME ACL: Fix buffer underrun that occurs when EOF condition is met
1491 while reading a MIME header. Thanks to Tom Hughes for a patch.
1493 PH/24 Include config.h inside local_scan.h so that configuration settings are
1496 PH/25 Make $smtp_command_argument available after all SMTP commands. This means
1497 that in an ACL for RCPT (for example), you can examine exactly what was
1500 PH/26 Exim was recognizing IPv6 addresses of the form [IPv6:....] in EHLO
1501 commands, but it was not correctly comparing the address with the actual
1502 client host address. Thus, it would show the EHLO address in Received:
1503 header lines when this was not necessary.
1505 PH/27 Added the % operator to ${eval:}.
1507 PH/28 Exim tries to create and chdir to its spool directory when it starts;
1508 it should be ignoring failures (because with -C, for example, it has lost
1509 privilege). It wasn't ignoring creation failures other than "already
1512 PH/29 Added "crypteq" to the list of supported features that Exim outputs when
1515 PH/30 Fixed (presumably very longstanding) bug in exim_dbmbuild: if it failed
1516 because an input line was too long, either on its own, or by virtue of
1517 too many continuations, the temporary file was not being removed, and the
1518 return code was incorrect.
1520 PH/31 Missing "BOOL" in function definition in filtertest.c.
1522 PH/32 Applied Sieve patches from the maintainer.
1524 TK/05 Domainkeys: Accomodate for a minor API change in libdomainkeys 0.67.
1526 PH/33 Added "verify = not_blind".
1528 PH/34 There are settings for CHOWN_COMMAND and MV_COMMAND that can be used in
1529 Local/Makefile (with some defaults set). These are used in built scripts
1530 such as exicyclog, but they have never been used in the exim_install
1531 script (though there are many overriding facilities there). I have
1532 arranged that the exim_install script now takes note of these two
1535 PH/35 Installed configuration files for Dragonfly.
1537 PH/36 When a locally submitted message by a trusted user did not contain a
1538 From: header, and the sender address was obtained from -f or from an SMTP
1539 MAIL command, and the trusted user did not use -F to supply a sender
1540 name, $originator_name was incorrectly used when constructing a From:
1541 header. Furthermore, $originator_name was used for submission mode
1542 messages from external hosts without From: headers in a similar way,
1543 which is clearly wrong.
1545 PH/37 Added control=suppress_local_fixups.
1547 PH/38 When log_selector = +received_sender was set, and the addition of the
1548 sender made the log line's construction buffer exactly full, or one byte
1549 less than full, an overflow happened when the terminating "\n" was
1552 PH/39 Added a new log selector, "unknown_in_list", which provokes a log entry
1553 when the result of a list match is failure because a DNS lookup failed.
1555 PH/40 RM_COMMAND is now used in the building process.
1557 PH/41 Added a "distclean" target to the top-level Makefile; it deletes all
1558 the "build-* directories that it finds.
1560 PH/42 (But a TF fix): In a domain list, Exim incorrectly matched @[] if the IP
1561 address in a domain literal was a prefix of an interface address.
1563 PH/43 (Again a TF fix): In the dnslookup router, do not apply widen_domains
1564 when verifying a sender address, unless rewrite_headers is false.
1566 PH/44 Wrote a long comment about why errors_to addresses are verified as
1567 recipients, not senders.
1569 TF/01 Add missing LIBS=-lm to OS/Makefile-OpenBSD which was overlooked when
1570 the ratelimit ACL was added.
1572 PH/45 Added $smtp_command for the full command (cf $smtp_command_argument).
1574 PH/46 Added extra information about PostgreSQL errors to the error string.
1576 PH/47 Added an interface to a fake DNS resolver for use by the new test suite,
1577 avoiding the need to install special zones in a real server. This is
1578 backwards compatible; if it can't find the fake resolver, it drops back.
1579 Thus, both old and new test suites can be run.
1581 TF/02 Added util/ratelimit.pl
1583 TF/03 Minor fix to the ratelimit code to improve its behaviour in case the
1584 clock is set back in time.
1586 TF/04 Fix the ratelimit support in exim_fixdb. Patch provided by Brian
1587 Candler <B.Candler@pobox.com>.
1589 TF/05 The fix for PH/43 was not completely correct; widen_domains is always
1590 OK for addresses that are the result of redirections.
1592 PH/48 A number of further additions for the benefit of the new test suite,
1593 including a fake gethostbyname() that interfaces to the fake DNS resolver
1596 TF/06 The fix for widen_domains has also been applied to qualify_single and
1597 search_parents which are the other dnslookup options that can cause
1600 PH/49 Michael Haardt's randomized retrying, but as a separate retry parameter
1603 PH/50 Make never_users, trusted_users, admin_groups, trusted_groups expandable.
1605 TF/07 Exim produced the error message "an SRV record indicated no SMTP
1606 service" if it encountered an MX record with an empty target hostname.
1607 The message is now "an MX or SRV record indicated no SMTP service".
1609 TF/08 Change PH/13 introduced the possibility that verify=helo may defer,
1610 if the DNS of the sending site is misconfigured. This is quite a
1611 common situation. This change restores the behaviour of treating a
1612 helo verification defer as a failure.
1614 PH/51 If self=fail was set on a router, the bounce message did not include the
1615 actual error message.
1621 TF/01 Added support for Client SMTP Authorization. See NewStuff for details.
1623 PH/01 When a transport filter timed out in a pipe delivery, and the pipe
1624 command itself ended in error, the underlying message about the transport
1625 filter timeout was being overwritten with the pipe command error. Now the
1626 underlying error message should be appended to the second error message.
1628 TK/01 Fix poll() being unavailable on Mac OSX 10.2.
1630 PH/02 Reduce the amount of output that "make" produces by default. Full output
1631 can still be requested.
1633 PH/03 The warning log line about a condition test deferring for a "warn" verb
1634 was being output only once per connection, rather than after each
1635 occurrence (because it was using the same function as for successful
1636 "warn" verbs). This seems wrong, so I have changed it.
1638 TF/02 Two buglets in acl.c which caused Exim to read a few bytes of memory that
1639 it should not have, which might have caused a crash in the right
1640 circumstances, but probably never did.
1642 PH/04 Installed a modified version of Tony Finch's patch to make submission
1643 mode fix the return path as well as the Sender: header line, and to
1644 add a /name= option so that you can make the user's friendly name appear
1647 TF/03 Added the control = fakedefer ACL modifier.
1649 TF/04 Added the ratelimit ACL condition. See NewStuff for details. Thanks to
1650 Mark Lowes for thorough testing.
1652 TK/02 Rewrote SPF support to work with libspf2 versions >1.2.0.
1654 TK/03 Merged latest SRS patch from Miles Wilton.
1656 PH/05 There's a shambles in IRIX6 - it defines EX_OK in unistd.h which conflicts
1657 with the definition in sysexits.h (which is #included earlier).
1658 Fortunately, Exim does not actually use EX_OK. The code used to try to
1659 preserve the sysexits.h value, by assumimg that macro definitions were
1660 scanned for macro replacements. I have been disabused of this notion,
1661 so now the code just undefines EX_OK before #including unistd.h.
1663 PH/06 There is a timeout for writing blocks of data, set by, e.g. data_timeout
1664 in the smtp transport. When a block could not be written in a single
1665 write() function, the timeout was being re-applied to each part-write.
1666 This seems wrong - if the receiver was accepting one byte at a time it
1667 would take for ever. The timeout is now adjusted when this happens. It
1668 doesn't have to be particularly precise.
1670 TK/04 Added simple SPF lookup method in EXPERIMENTAL_SPF. See NewStuff for
1671 details. Thanks to Chris Webb <chris@arachsys.com> for the patch!
1673 PH/07 Added "fullpostmaster" verify option, which does a check to <postmaster>
1674 without a domain if the check to <postmaster@domain> fails.
1676 SC/01 Eximstats: added -xls and the ability to specify output files
1677 (patch written by Frank Heydlauf).
1679 SC/02 Eximstats: use FileHandles for outputing results.
1681 SC/03 Eximstats: allow any combination of xls, txt, and html output.
1683 SC/04 Eximstats: fixed display of large numbers with -nvr option
1685 SC/05 Eximstats: fixed merging of reports with empty tables.
1687 SC/06 Eximstats: added the -include_original_destination flag
1689 SC/07 Eximstats: removed tabs and trailing whitespace.
1691 TK/05 Malware: Improve on aveserver error handling. Patch from Alex Miller.
1693 TK/06 MBOX spool code: Add real "From " MBOX separator line
1694 so the .eml file is really in mbox format (even though
1695 most programs do not really care). Patch from Alex Miller.
1697 TK/07 MBOX spool code: Add X-Envelope-From: and X-Envelope-To: headers.
1698 The latter is generated from $received_to and is only set if the
1699 message has one envelope recipient. SA can use these headers,
1700 obviously out-of-the-box. Patch from Alex Miller.
1702 PH/08 The ${def test on a variable was returning false if the variable's
1703 value was "0", contrary to what the specification has always said!
1704 The result should be true unless the variable is empty.
1706 PH/09 The syntax error of a character other than { following "${if
1707 def:variable_name" (after optional whitespace) was not being diagnosed.
1708 An expansion such as ${if def:sender_ident:{xxx}{yyy}} in which an
1709 accidental colon was present, for example, could give incorrect results.
1711 PH/10 Tidied the code in a number of places where the st_size field of a stat()
1712 result is used (not including appendfile, where other changes are about
1715 PH/11 Upgraded appendfile so that quotas larger than 2G are now supported.
1716 This involved changing a lot of size variables from int to off_t. It
1717 should work with maildirs and everything.
1719 TK/08 Apply fix provided by Michael Haardt to prevent deadlock in case of
1720 spamd dying while we are connected to it.
1722 TF/05 Fixed a ${extract error message typo reported by Jeremy Harris
1725 PH/12 Applied Alex Kiernan's patch for the API change for the error callback
1726 function for BDB 4.3.
1728 PH/13 Changed auto_thaw such that it does not apply to bounce messages.
1730 PH/14 Imported PCRE 6.0; this was more than just a trivial operation because
1731 the sources for PCRE have been re-arranged and more files are now
1734 PH/15 The code I had for printing potentially long long variables in PH/11
1735 above was not the best (it lost precision). The length of off_t variables
1736 is now inspected at build time, and an appropriate printing format (%ld
1737 or %lld) is chosen and #defined by OFF_T_FMT. We also define LONGLONG_T
1738 to be "long long int" or "long int". This is needed for the internal
1739 formatting function string_vformat().
1741 PH/16 Applied Matthew Newton's patch to exicyclog: "If log_file_path is set in
1742 the configuration file to be ":syslog", then the script "guesses" where
1743 the logs files are, rather than using the compiled in default. In our
1744 case the guess is not the same as the compiled default, so the script
1745 suddenly stopped working when I started to use syslog. The patch checks
1746 to see if log_file_path is "". If so, it attempts to read it from exim
1747 with no configuration file to get the compiled in version, before it
1748 falls back to the previous guessing code."
1750 TK/09 Added "prvs" and "prvscheck" expansion items. These help a lot with
1751 implementing BATV in an Exim configuration. See NewStuff for the gory
1754 PH/17 Applied Michael Haardt's patch for HP-UX, affecting only the os.h and
1755 Makefile that are specific to HP-UX.
1757 PH/18 If the "use_postmaster" option was set for a recipient callout together
1758 with the "random" option, the postmaster address was used as the MAIL
1759 FROM address for the random test, but not for the subsequent recipient
1760 test. It is now used for both.
1762 PH/19 Applied Michael Haardt's patch to update Sieve to RFC3028bis. "The
1763 patch removes a few documentation additions to RFC 3028, because the
1764 latest draft now contains them. It adds the new en;ascii-case comparator
1765 and a new error check for 8bit text in MIME parts. Comparator and
1766 require names are now matched exactly. I enabled the subaddress
1767 extension, but it is not well tested yet (read: it works for me)."
1769 PH/20 Added macros for time_t as for off_t (see PH/15 above) and used them to
1770 rework some of the code of TK/09 above to avoid the hardwired use of
1771 "%lld" and "long long". Replaced the call to snprintf() with a call to
1774 PH/21 Added some other messages to those in 4.51/PH/42, namely "All relevant MX
1775 records point to non-existent hosts", "retry timeout exceeded", and
1776 "retry time not reached for any host after a long failure period".
1778 PH/22 Fixed some oversights/typos causing bugs when Exim is compiled with
1779 experimental DomainKeys support:
1781 (1) The filter variables $n0-$n9 and $sn0-$sn9 were broken.
1782 (2) On an error such as an illegally used "control", the wrong name for
1783 the control was given.
1785 These problems did NOT occur unless DomainKeys support was compiled.
1787 PH/23 Added daemon_startup_retries and daemon_startup_sleep.
1789 PH/24 Added ${if match_ip condition.
1791 PH/25 Put debug statements on either side of calls to EXIM_DBOPEN() for hints
1792 databases so that it will be absolutely obvious if a crash occurs in the
1793 DB library. This is a regular occurrence (often caused by mis-matched
1796 PH/26 Insert a lot of missing (void) casts for functions such as chown(),
1797 chmod(), fcntl(), sscanf(), and other functions from stdio.h. These were
1798 picked up on a user's system that detects such things. There doesn't seem
1799 to be a gcc warning option for this - only an attribute that has to be
1800 put on the function's prototype. It seems that in Fedora Core 4 they have
1801 set this on a number of new functions. No doubt there will be more in due
1804 PH/27 If a dnslookup or manualroute router is set with verify=only, it need not
1805 specify a transport. However, if an address that was verified by such a
1806 router was the subject of a callout, Exim crashed because it tried to
1807 read the rcpt_include_affixes from the non-existent transport. Now it
1808 just assumes that the setting of that option is false. This bug was
1809 introduced by 4.51/PH/31.
1811 PH/28 Changed -d+all to exclude +memory, because that information is very
1812 rarely of interest, but it makes the output a lot bigger. People tend to
1813 do -d+all out of habit.
1815 PH/29 Removed support for the Linux-libc5 build, as it is obsolete and the
1816 code in os-type was giving problems when libc.so lives in lib64, like on
1819 PH/30 Exim's DNS code uses the original T_xxx names for DNS record times. These
1820 aren't the modern standard, and it seems that some systems' include files
1821 don't always have them. Exim was already checking for some of the newer
1822 ones like T_AAAA, and defining it itself. I've added checks for all the
1823 record types that Exim uses.
1825 PH/31 When using GnuTLS, if the parameters cache file did not exist, Exim was
1826 not automatically generating a new one, as it is supposed to. This
1827 prevented TLS from working. If the file did exist, but contained invalid
1828 data, a new version was generated, as expected. It was only the case of a
1829 non-existent file that was broken.
1831 TK/10 Domainkeys: Fix a bug in verification that caused a crash in conjunction
1832 with a change in libdomainkeys > 0.64.
1834 TK/11 Domainkeys: Change the logic how the "testing" policy flag is retrieved
1835 from DNS. If the selector record carries the flag, it now has
1836 precedence over the domain-wide flag.
1838 TK/12 Cleared some compiler warnings related to SPF, SRS and DK code.
1840 PH/32 In mua_wrapper mode, if an smtp transport configuration error (such as
1841 the use of a port name that isn't defined in /etc/services) occurred, the
1842 message was deferred as in a normal delivery, and thus remained on the
1843 spool, instead of being failed because of the mua_wrapper setting. This
1844 is now fixed, and I tidied up some of the mua_wrapper messages at the
1847 SC/08 Eximstats: whilst parsing the mainlog(s), store information about
1848 the messages in a hash of arrays rather than using individual hashes.
1849 This is a bit cleaner and results in dramatic memory savings, albeit
1850 at a slight CPU cost.
1852 SC/09 Eximstats: added the -show_rt<list> and the -show_dt<list> flags
1853 as requested by Marc Sherman.
1855 SC/10 Eximstats: added histograms for user specified patterns as requested
1858 SC/11 Eximstats: v1.43 - bugfix for pattern histograms with -h0 specified.
1860 PH/33 Patch from the Cygwin maintainer to add "b" to all occurences of
1861 fopen() in the content-scanning modules that did not already have it.
1867 TK/01 Added Yahoo DomainKeys support via libdomainkeys. See
1868 doc/experimental-spec.txt for details. (http://domainkeys.sf.net)
1870 TK/02 Fix ACL "control" statement not being available in MIME ACL.
1872 TK/03 Fix ACL "regex" condition not being available in MIME ACL.
1874 PH/01 Installed a patch from the Sieve maintainer that allows -bf to be used
1875 to test Sieve filters that use "vacation".
1877 PH/02 Installed a slightly modified version of Nikos Mavrogiannopoulos' patch
1878 that changes the way the GnuTLS parameters are stored in the cache file.
1879 The new format can be generated externally. For backward compatibility,
1880 if the data in the cache doesn't make sense, Exim assumes it has read an
1881 old-format file, and it generates new data and writes a new file. This
1882 means that you can't go back to an older release without removing the
1885 PH/03 A redirect router that has both "unseen" and "one_time" set does not
1886 work if there are any delivery delays because "one_time" forces the
1887 parent to be marked "delivered", so its unseen clone is never tried
1888 again. For this reason, Exim now forbids the simultaneous setting of
1891 PH/04 Change 4.11/85 fixed an obscure bug concerned with addresses that are
1892 redirected to themselves ("homonym" addresses). Read the long ChangeLog
1893 entry if you want to know the details. The fix, however, neglected to
1894 consider the case when local delivery batching is involved. The test for
1895 "previously delivered" was not happening when checking to see if an
1896 address could be batched with a previous (undelivered) one; under
1897 certain circumstances this could lead to multiple deliveries to the same
1900 PH/05 Renamed the macro SOCKLEN_T as EXIM_SOCKLEN_T because AIX uses SOCKLEN_T
1901 in its include files, and this causes problems building Exim.
1903 PH/06 A number of "verify =" ACL conditions have no options (e.g. verify =
1904 header_syntax) but Exim was just ignoring anything given after a slash.
1905 In particular, this caused confusion with an attempt to use "verify =
1906 reverse_host_lookup/defer_ok". An error is now given when options are
1907 supplied for verify items that do not have them. (Maybe reverse_host_
1908 lookup should have a defer_ok option, but that's a different point.)
1910 PH/07 Increase the size of the buffer for incoming SMTP commands from 512 (as
1911 defined by RFC 821) to 2048, because there were problems with some AUTH
1912 commands, and RFC 1869 says the size should be increased for extended
1913 SMTP commands that take arguments.
1915 PH/08 Added ${dlfunc dynamically loaded function for expansion (code from Tony
1918 PH/09 Previously, an attempt to use ${perl when it wasn't compiled gave an
1919 "unknown" error; now it says that the functionality isn't in the binary.
1921 PH/10 Added a nasty fudge to try to recognize and flatten LDAP passwords in
1922 an address' error message when a string expansion fails (syntax or
1923 whatever). Otherwise the password may appear in the log. Following change
1924 PH/42 below, there is no longer a chance of it appearing in a bounce
1927 PH/11 Installed exipick version 20050225.0 from John Jetmore.
1929 PH/12 If the last host in a fallback_hosts list was multihomed, only the first
1930 of its addresses was ever tried. (Bugzilla bug #2.)
1932 PH/13 If "headers_add" in a transport didn't end in a newline, Exim printed
1933 the result incorrectly in the debug output. (It correctly added a newline
1934 to what was transported.)
1936 TF/01 Added $received_time.
1938 PH/14 Modified the default configuration to add an acl_smtp_data ACL, with
1939 commented out examples of how to interface to a virus scanner and to
1940 SpamAssassin. Also added commented examples of av_scanner and
1941 spamd_address settings.
1943 PH/15 Further to TK/02 and TK/03 above, tidied up the tables of what conditions
1944 and controls are allowed in which ACLs. There were a couple of minor
1945 errors. Some of the entries in the conditions table (which is a table of
1946 where they are NOT allowed) were getting very unwieldy; rewrote them as a
1947 negation of where the condition IS allowed.
1949 PH/16 Installed updated OS/os.c-cygwin from the Cygwin maintainer.
1951 PH/17 The API for radiusclient changed at release 0.4.0. Unfortunately, the
1952 header file does not have a version number, so I've had to invent a new
1953 value for RADIUS_LIB_TYPE, namely "RADIUSCLIENTNEW" to request the new
1954 API. The code is untested by me (my Linux distribution still has 0.3.2 of
1955 radiusclient), but it was contributed by a Radius user.
1957 PH/18 Installed Lars Mainka's patch for the support of CRL collections in
1958 files or directories, for OpenSSL.
1960 PH/19 When an Exim process that is running as root has to create an Exim log
1961 file, it does so in a subprocess that runs as exim:exim so as to get the
1962 ownership right at creation (otherwise, other Exim processes might see
1963 the file with the wrong ownership). There was no test for failure of this
1964 fork() call, which would lead to the process getting stuck as it waited
1965 for a non-existent subprocess. Forks do occasionally fail when resources
1966 run out. I reviewed all the other calls to fork(); they all seem to check
1969 PH/20 When checking for unexpected SMTP input at connect time (before writing
1970 the banner), Exim was not dealing correctly with a non-positive return
1971 from the read() function. If the client had disconnected by this time,
1972 the result was a log entry for a synchronization error with an empty
1973 string after "input=" when read() returned zero. If read() returned -1
1974 (an event I could not check), uninitialized data bytes were printed.
1975 There were reports of junk text (parts of files, etc) appearing after
1978 PH/21 Added acl_not_smtp_mime to allow for MIME scanning for non-SMTP messages.
1980 PH/22 Added support for macro redefinition, and (re)definition in between
1981 driver and ACL definitions.
1983 PH/23 The cyrus_sasl authenticator was expanding server_hostname, but then
1984 forgetting to use the resulting value; it was using the unexpanded value.
1986 PH/24 The cyrus_sasl authenticator was advertising mechanisms for which it
1987 hadn't been configured. The fix is from Juergen Kreileder, who
1988 understands it better than I do:
1990 "Here's what I see happening with three configured cyrus_sasl
1991 authenticators configured (plain, login, cram-md5):
1993 On startup auth_cyrus_sasl_init() gets called for each of these.
1994 This means three calls to sasl_listmech() without a specified mech_list.
1995 => SASL tests which mechs of all available mechs actually work
1996 => three warnings about OTP not working
1997 => the returned list contains: plain, login, cram-md5, digest-md5, ...
1999 With the patch, sasl_listmech() also gets called three times. But now
2000 SASL's mech_list option is set to the server_mech specified in the the
2001 authenticator. Or in other words, the answer from sasl_listmech()
2002 gets limited to just the mech you're testing for (which is different
2004 => the return list contains just 'plain' or 'login', 'cram-md5' or
2005 nothing depending on the value of ob->server_mech.
2007 I've just tested the patch: Authentication still works fine,
2008 unavailable mechs specified in the exim configuration are still
2009 caught, and the auth.log warnings about OTP are gone."
2011 PH/25 When debugging is enabled, the contents of the command line are added
2012 to the debugging output, even when log_selector=+arguments is not
2015 PH/26 Change scripts/os-type so that when "uname -s" returns just "GNU", the
2016 answer is "GNU", and only if the return is "GNU/something" is the answer
2019 PH/27 $acl_verify_message is now set immediately after the failure of a
2020 verification in an ACL, and so is available in subsequent modifiers. In
2021 particular, the message can be preserved by coding like this:
2023 warn !verify = sender
2024 set acl_m0 = $acl_verify_message
2026 Previously, $acl_verify_message was set only while expanding "message"
2027 and "log_message" when a very denied access.
2029 PH/28 Modified OS/os.c-Linux with
2031 -#ifndef OS_LOAD_AVERAGE
2032 +#if !defined(OS_LOAD_AVERAGE) && defined(__linux__)
2034 to make Exim compile on kfreebsd-gnu. (I'm totally confused about the
2035 nomenclature these days.)
2037 PH/29 Installed patch from the Sieve maintainer that adds the options
2038 sieve_useraddress and sieve_subaddress to the redirect router.
2040 PH/30 In these circumstances:
2041 . Two addresses routed to the same list of hosts;
2042 . First host does not offer TLS;
2043 . First host accepts first address;
2044 . First host gives temporary error to second address;
2045 . Second host offers TLS and a TLS session is established;
2046 . Second host accepts second address.
2047 Exim incorrectly logged both deliveries with the TLS parameters (cipher
2048 and peerdn, if requested) that were in fact used only for the second
2051 PH/31 When doing a callout as part of verifying an address, Exim was not paying
2052 attention to any local part prefix or suffix that was matched by the
2053 router that accepted the address. It now behaves in the same way as it
2054 does for delivery: the affixes are removed from the local part unless
2055 rcpt_include_affixes is set on the transport.
2057 PH/32 Add the sender address, as F=<...>, to the log line when logging a
2058 timeout during the DATA phase of an incoming message.
2060 PH/33 Sieve envelope tests were broken for match types other than :is. I have
2061 applied a patch sanctioned by the Sieve maintainer.
2063 PH/34 Change 4.50/80 broke Exim in that it could no longer handle cases where
2064 the uid or gid is negative. A case of a negative gid caused this to be
2065 noticed. The fix allows for either to be negative.
2067 PH/35 ACL_WHERE_MIME is now declared unconditionally, to avoid too much code
2068 clutter, but the tables that are indexed by ACL_WHERE_xxx values had been
2071 PH/36 The change PH/12 above was broken. Fixed it.
2073 PH/37 Exim used to check for duplicate addresses in the middle of routing, on
2074 the grounds that routing the same address twice would always produce the
2075 same answer. This might have been true once, but it is certainly no
2076 longer true now. Routing a child address may depend on the previous
2077 routing that produced that child. Some complicated redirection strategies
2078 went wrong when messages had multiple recipients, and made Exim's
2079 behaviour dependent on the order in which the addresses were given.
2081 I have moved the duplicate checking until after the routing is complete.
2082 Exim scans the addresses that are assigned to local and remote
2083 transports, and removes any duplicates. This means that more work will be
2084 done, as duplicates will always all be routed, but duplicates are
2085 presumably rare, so I don't expect this is of any significance.
2087 For deliveries to pipes, files, and autoreplies, the duplicate checking
2088 still happens during the routing process, since they are not going to be
2091 PH/38 Installed a patch from Ian Freislich, with the agreement of Tom Kistner.
2092 It corrects a timeout issue with spamd. This is Ian's comment: "The
2093 background is that sometimes spamd either never reads data from a
2094 connection it has accepted, or it never writes response data. The exiscan
2095 spam.[ch] uses a 3600 second timeout on spamd socket reads, further, it
2096 blindly assumes that writes won't block so it may never time out."
2098 PH/39 Allow G after quota size as well as K and M.
2100 PH/40 The value set for $authenticated_id in an authenticator may not contain
2101 binary zeroes or newlines because the value is written to log lines and
2102 to spool files. There was no check on this. Now the value is run through
2103 the string_printing() function so that such characters are converted to
2104 printable escape sequences.
2106 PH/41 $message_linecount is a new variable that contains the total number of
2107 lines in the message. Compare $body_linecount, which is the count for the
2110 PH/42 Exim no longer gives details of delivery errors for specific addresses in
2111 bounce and delay warning messages, except in certain special cases, which
2114 (a) An SMTP error message from a remote host;
2115 (b) A message specified in a :fail: redirection;
2116 (c) A message specified in a "fail" command in a system filter;
2117 (d) A message specified in a FAIL return from the queryprogram router;
2118 (e) A message specified by the cannot_route_message router option.
2120 In these cases only, Exim does include the error details in bounce and
2121 warning messages. There are also a few cases where bland messages such
2122 as "unrouteable address" or "local delivery error" are given.
2124 PH/43 $value is now also set for the "else" part of a ${run expansion.
2126 PH/44 Applied patch from the Sieve maintainer: "The vacation draft is still
2127 being worked on, but at least Exim now implements the latest version to
2130 PH/45 In a pipe transport, although a timeout while waiting for the pipe
2131 process to complete was treated as a delivery failure, a timeout while
2132 writing the message to the pipe was logged, but erroneously treated as a
2133 successful delivery. Such timeouts include transport filter timeouts. For
2134 consistency with the overall process timeout, these timeouts are now
2135 treated as errors, giving rise to delivery failures by default. However,
2136 there is now a new Boolean option for the pipe transport called
2137 timeout_defer, which, if set TRUE, converts the failures into defers for
2138 both kinds of timeout. A transport filter timeout is now identified in
2141 PH/46 The "scripts/Configure-config.h" script calls "make" at one point. On
2142 systems where "make" and "gmake" are different, calling "gmake" at top
2143 level broke things. I've arranged for the value of $(MAKE) to be passed
2144 from the Makefile to this script so that it can call the same version of
2148 A note about Exim versions 4.44 and 4.50
2149 ----------------------------------------
2151 Exim 4.50 was meant to be the next release after 4.43. It contains a lot of
2152 changes of various kinds. As a consequence, a big documentation update was
2153 needed. This delayed the release for rather longer than seemed good, especially
2154 in the light of a couple of (minor) security issues. Therefore, the changes
2155 that fixed bugs were backported into 4.43, to create a 4.44 maintenance
2156 release. So 4.44 and 4.50 are in effect two different branches that both start
2159 I have left the 4.50 change log unchanged; it contains all the changes since
2160 4.43. The change log for 4.44 is below; many of its items are identical to
2161 those for 4.50. This seems to be the most sensible way to preserve the
2162 historical information.
2168 1. Minor wording change to the doc/README.SIEVE file.
2170 2. Change 4.43/35 introduced a bug: if quota_filecount was set, the
2171 computation of the current number of files was incorrect.
2173 3. Closing a stable door: arrange to panic-die if setitimer() ever fails. The
2174 bug fixed in 4.43/37 would have been diagnosed quickly if this had been in
2177 4. Give more explanation in the error message when the command for a transport
2178 filter fails to execute.
2180 5. There are several places where Exim runs a non-Exim command in a
2181 subprocess. The SIGUSR1 signal should be disabled for these processes. This
2182 was being done only for the command run by the queryprogram router. It is
2183 now done for all such subprocesses. The other cases are: ${run, transport
2184 filters, and the commands run by the lmtp and pipe transports.
2186 6. Added CONFIGURE_GROUP build-time option.
2188 7. Some older OS have a limit of 256 on the maximum number of file
2189 descriptors. Exim was using setrlimit() to set 1000 as a large value
2190 unlikely to be exceeded. Change 4.43/17 caused a lot of logging on these
2191 systems. I've change it so that if it can't get 1000, it tries for 256.
2193 8. "control=submission" was allowed, but had no effect, in a DATA ACL. This
2194 was an oversight, and furthermore, ever since the addition of extra
2195 controls (e.g. 4.43/32), the checks on when to allow different forms of
2196 "control" were broken. There should now be diagnostics for all cases when a
2197 control that does not make sense is encountered.
2199 9. Added the /retain_sender option to "control=submission".
2201 10. $recipients is now available in the predata ACL (oversight).
2203 11. Tidy the search cache before the fork to do a delivery from a message
2204 received from the command line. Otherwise the child will trigger a lookup
2205 failure and thereby defer the delivery if it tries to use (for example) a
2206 cached ldap connection that the parent has called unbind on.
2208 12. If verify=recipient was followed by verify=sender in a RCPT ACL, the value
2209 of $address_data from the recipient verification was clobbered by the
2210 sender verification.
2212 13. The value of address_data from a sender verification is now available in
2213 $sender_address_data in subsequent conditions in the ACL statement.
2215 14. Added forbid_sieve_filter and forbid_exim_filter to the redirect router.
2217 15. Added a new option "connect=<time>" to callout options, to set a different
2220 16. If FIXED_NEVER_USERS was defined, but empty, Exim was assuming the uid 0
2221 was its contents. (It was OK if the option was not defined at all.)
2223 17. A "Completed" log line is now written for messages that are removed from
2224 the spool by the -Mrm option.
2226 18. New variables $sender_verify_failure and $recipient_verify_failure contain
2227 information about exactly what failed.
2229 19. Added -dd to debug only the daemon process.
2231 20. Incorporated Michael Haardt's patch to ldap.c for improving the way it
2232 handles timeouts, both on the server side and network timeouts. Renamed the
2233 CONNECT parameter as NETTIMEOUT (but kept the old name for compatibility).
2235 21. The rare case of EHLO->STARTTLS->HELO was setting the protocol to "smtp".
2236 It is now set to "smtps".
2238 22. $host_address is now set to the target address during the checking of
2239 ignore_target_hosts.
2241 23. When checking ignore_target_hosts for an ipliteral router, no host name was
2242 being passed; this would have caused $sender_host_name to have been used if
2243 matching the list had actually called for a host name (not very likely,
2244 since this list is usually IP addresses). A host name is now passed as
2247 24. Changed the calls that set up the SIGCHLD handler in the daemon to use the
2248 code that specifies a non-restarting handler (typically sigaction() in
2249 modern systems) in an attempt to fix a rare and obscure crash bug.
2251 25. Narrowed the window for a race in the daemon that could cause it to ignore
2252 SIGCHLD signals. This is not a major problem, because they are used only to
2253 wake it up if nothing else does.
2255 26. A malformed maildirsize file could cause Exim to calculate negative values
2256 for the mailbox size or file count. Odd effects could occur as a result.
2257 The maildirsize information is now recalculated if the size or filecount
2260 27. Added HAVE_SYS_STATVFS_H to the os.h file for Linux, as it has had this
2261 support for a long time. Removed HAVE_SYS_VFS_H.
2263 28. Installed the latest version of exipick from John Jetmore.
2265 29. In an address list, if the pattern was not a regular expression, an empty
2266 subject address (from a bounce message) matched only if the pattern was an
2267 empty string. Non-empty patterns were not even tested. This was the wrong
2268 because it is perfectly reasonable to use an empty address as part of a
2269 database query. An empty address is now tested by patterns that are
2270 lookups. However, all the other forms of pattern expect the subject to
2271 contain a local part and a domain, and therefore, for them, an empty
2272 address still always fails if the pattern is not itself empty.
2274 30. Exim went into a mad DNS loop when attempting to do a callout where the
2275 host was specified on an smtp transport, and looking it up yielded more
2276 than one IP address.
2278 31. Re-factored the code for checking spool and log partition space into a
2279 function that finds that data and another that does the check. The former
2280 is then used to implement four new variables: $spool_space, $log_space,
2281 $spool_inodes, and $log_inodes.
2283 32. The RFC2047 encoding function was originally intended for short strings
2284 such as real names; it was not keeping to the 75-character limit for
2285 encoded words that the RFC imposes. It now respects the limit, and
2286 generates multiple encoded words if necessary. To be on the safe side, I
2287 have increased the buffer size for the ${rfc2047: expansion operator from
2290 33. It is now permitted to omit both strings after an "if" condition; if the
2291 condition is true, the result is "true". As before, when the second string
2292 is omitted, a false condition yields an empty string. This makes it less
2293 cumbersome to write custom ACL and router conditions.
2295 34. Failure to deliver a bounce message always caused it to be frozen, even if
2296 there was an errors_to setting on the router. The errors_to setting is now
2299 35. If an IPv6 address is given for -bh or -bhc, it is now converted to the
2300 canonical form (fully expanded) before being placed in
2301 $sender_host_address.
2303 36. The table in the code that translates DNS record types into text (T_A to
2304 "A" for instance) was missing entries for NS and CNAME. It is just possible
2305 that this could have caused confusion if both these types were looked up
2306 for the same domain, because the text type is used as part of Exim's
2307 per-process caching. But the chance of anyone hitting this buglet seems
2310 37. The dnsdb lookup has been extended in a number of ways.
2312 (1) There is a new type, "zns", which walks up the domain tree until it
2313 finds some nameserver records. It should be used with care.
2315 (2) There is a new type, "mxh", which is like "mx" except that it returns
2316 just the host names, not the priorities.
2318 (3) It is now possible to give a list of domains (or IP addresses) to be
2319 looked up. The behaviour when one of the lookups defers can be
2320 controlled by a keyword.
2322 (4) It is now possible to specify the separator character for use when
2323 multiple records are returned.
2325 38. The dnslists ACL condition has been extended: it is now possible to supply
2326 a list of IP addresses and/or domains to be looked up in a particular DNS
2329 39. Added log_selector=+queue_time_overall.
2331 40. When running the queue in the test harness, wait just a tad after forking a
2332 delivery process, to get repeatability of debugging output.
2334 41. Include certificate and key file names in error message when GnuTLS fails
2335 to set them up, because the GnuTLS error message doesn't include the name
2336 of the failing file when there is a problem reading it.
2338 42. Allow both -bf and -bF in the same test run.
2340 43. Did the same fix as 41 above for OpenSSL, which had the same infelicity.
2342 44. The "Exiscan patch" is now merged into the mainline Exim source.
2344 45. Sometimes the final signoff response after QUIT could fail to get
2345 transmitted in the non-TLS case. Testing !tls_active instead of tls_active
2346 < 0 before doing a fflush(). This bug looks as though it goes back to the
2347 introduction of TLS in release 3.20, but "sometimes" must have been rare
2348 because the tests only now provoked it.
2350 46. Reset the locale to "C" after calling embedded Perl, in case it was changed
2351 (this can affect the format of dates).
2353 47. exim_tidydb, when checking for the continued existence of a message for
2354 which it has found a message-specific retry record, was not finding
2355 messages that were in split spool directories. Consequently, it was
2356 deleting retry records that should have stayed in existence.
2358 48. Steve fixed some bugs in eximstats.
2360 49. The SPA authentication driver was not abandoning authentication and moving
2361 on to the next authenticator when an expansion was forced to fail,
2362 contradicting the general specification for all authenticators. Instead it
2363 was generating a temporary error. It now behaves as specified.
2365 50. The default ordering of permitted cipher suites for GnuTLS was pessimal
2366 (the order specifies the preference for clients). The order is now AES256,
2367 AES128, 3DES, ARCFOUR128.
2369 51. Small patch to Sieve code - explicitly set From: when generating an
2372 52. Exim crashed if a remote delivery caused a very long error message to be
2373 recorded - for instance if somebody sent an entire SpamAssassin report back
2374 as a large number of 550 error lines. This bug was coincidentally fixed by
2375 increasing the size of one of Exim's internal buffers (big_buffer) that
2376 happened as part of the Exiscan merge. However, to be on the safe side, I
2377 have made the code more robust (and fixed the comments that describe what
2380 53. Now that there can be additional text after "Completed" in log lines (if
2381 the queue_time_overall log selector is set), a one-byte patch to exigrep
2382 was needed to allow it to recognize "Completed" as not the last thing in
2385 54. The LDAP lookup was not handling a return of LDAP_RES_SEARCH_REFERENCE. A
2386 patch that reportedly fixes this has been added. I am not expert enough to
2387 create a test for it. This is what the patch creator wrote:
2389 "I found a little strange behaviour of ldap code when working with
2390 Windows 2003 AD Domain, where users was placed in more than one
2391 Organization Units. When I tried to give exim partial DN, the exit code
2392 of ldap_search was unknown to exim because of LDAP_RES_SEARCH_REFERENCE.
2393 But simultaneously result of request was absolutely normal ldap result,
2394 so I produce this patch..."
2396 Later: it seems that not all versions of LDAP support LDAP_RES_SEARCH_
2397 REFERENCE, so I have modified the code to exclude the patch when that macro
2400 55. Some experimental protocols are using DNS PTR records for new purposes. The
2401 keys for these records are domain names, not reversed IP addresses. The
2402 dnsdb PTR lookup now tests whether its key is an IP address. If not, it
2403 leaves it alone. Component reversal etc. now happens only for IP addresses.
2406 56. Improve error message when ldap_search() fails in OpenLDAP or Solaris LDAP.
2408 57. Double the size of the debug message buffer (to 2048) so that more of very
2409 long debug lines gets shown.
2411 58. The exicyclog utility now does better if the number of log files to keep
2412 exceeds 99. In this case, it numbers them 001, 002 ... instead of 01, 02...
2414 59. Two changes related to the smtp_active_hostname option:
2416 (1) $smtp_active_hostname is now available as a variable.
2417 (2) The default for smtp_banner uses $smtp_active_hostname instead
2418 of $primary_hostname.
2420 60. The host_aton() function is supposed to be passed a string that is known
2421 to be a valid IP address. However, in the case of IPv6 addresses, it was
2422 not checking this. This is a hostage to fortune. Exim now panics and dies
2423 if the condition is not met. A case was found where this could be provoked
2424 from a dnsdb PTR lookup with an IPv6 address that had more than 8
2425 components; fortuitously, this particular loophole had already been fixed
2426 by change 4.50/55 above.
2428 If there are any other similar loopholes, the new check in host_aton()
2429 itself should stop them being exploited. The report I received stated that
2430 data on the command line could provoke the exploit when Exim was running as
2431 exim, but did not say which command line option was involved. All I could
2432 find was the use of -be with a bad dnsdb PTR lookup, and in that case it is
2433 running as the user.
2436 61. There was a buffer overflow vulnerability in the SPA authentication code
2437 (which came originally from the Samba project). I have added a test to the
2438 spa_base64_to_bits() function which I hope fixes it.
2441 62. Configuration update for GNU/Hurd and variations. Updated Makefile-GNU and
2442 os.h-GNU, and added configuration files for GNUkFreeBSD and GNUkNetBSD.
2444 63. The daemon start-up calls getloadavg() while still root for those OS that
2445 need the first call to be done as root, but it missed one case: when
2446 deliver_queue_load_max is set with deliver_drop_privilege. This is
2447 necessary for the benefit of the queue runner, because there is no re-exec
2448 when deliver_drop_privilege is set.
2450 64. A call to exiwhat cut short delays set up by "delay" modifiers in ACLs.
2451 This has been fixed.
2453 65. Caching of lookup data for "hosts =" ACL conditions, when a named host list
2454 was in use, was not putting the data itself into the right store pool;
2455 consequently, it could be overwritten for a subsequent message in the same
2456 SMTP connection. (Fix 4.40/11 dealt with the non-cache case, but overlooked
2459 66. Added hosts_max_try_hardlimit to the smtp transport, default 50.
2461 67. The string_is_ip_address() function returns 0, 4, or 6, for "no an IP
2462 address", "IPv4 address", and "IPv6 address", respectively. Some calls of
2463 the function were treating the return as a boolean value, which happened to
2464 work because 0=false and not-0=true, but is not correct code.
2466 68. The host_aton() function was not handling scoped IPv6 addresses (those
2467 with, for example, "%eth0" on the end) correctly.
2469 69. Fixed some compiler warnings in acl.c for the bitmaps specified with
2470 negated items (that is, ~something) in unsigned ints. Some compilers
2471 apparently mutter when there is no cast.
2473 70. If an address verification called from an ACL failed, and did not produce a
2474 user-specific message (i.e. there was only a "system" message), nothing was
2475 put in $acl_verify_message. In this situation, it now puts the system
2478 71. Change 4.23/11 added synchronization checking at the start of an SMTP
2479 session; change 4.31/43 added the unwanted input to the log line - except
2480 that it did not do this in the start of session case. It now does.
2482 72. After a timeout in a callout SMTP session, Exim still sent a QUIT command.
2483 This is wrong and can cause the other end to generate a synchronization
2484 error if it is another Exim or anything else that does the synchronization
2485 check. A QUIT command is no longer sent after a timeout.
2487 73. $host_lookup_deferred has been added, to make it easier to detect DEFERs
2488 during host lookups.
2490 74. The defer_ok option of callout verification was not working if it was used
2491 when verifying addresses in header lines, that is, for this case:
2493 verify = header_sender/callout=defer_ok
2495 75. A backgrounded daemon closed stdin/stdout/stderr on entry; this meant that
2496 those file descriptors could be used for SMTP connections. If anything
2497 wrote to stderr (the example that came up was "warn" in embedded Perl), it
2498 could be sent to the SMTP client, causing chaos. The daemon now opens
2499 stdin, stdout, and stderr to /dev/null when it puts itself into the
2502 76. Arrange for output from Perl's "warn" command to be written to Exim's main
2503 log by default. The user can override this with suitable Perl magic.
2505 77. The use of log_message on a "discard" ACL verb, which is supposed to add to
2506 the log message when discard triggers, was not working for the DATA ACL or
2507 for the non-SMTP ACL.
2509 78. Error message wording change in sieve.c.
2511 79. If smtp_accept_max_per_host was set, the number of connections could be
2512 restricted to fewer than expected, because the daemon was trying to set up
2513 a new connection before checking whether the processes handling previous
2514 connections had finished. The check for completed processes is now done
2515 earlier. On busy systems, this bug wouldn't be noticed because something
2516 else would have woken the daemon, and it would have reaped the completed
2519 80. If a message was submitted locally by a user whose login name contained one
2520 or more spaces (ugh!), the spool file that Exim wrote was not re-readable.
2521 It caused a spool format error. I have fixed the spool reading code. A
2522 related problem was that the "from" clause in the Received: line became
2523 illegal because of the space(s). It is now covered by ${quote_local_part.
2525 81. Included the latest eximstats from Steve (adds average sizes to HTML Top
2528 82. Updated OS/Makefile-AIX as per message from Mike Meredith.
2530 83. Patch from Sieve maintainer to fix unterminated string problem in
2531 "vacation" handling.
2533 84. Some minor changes to the Linux configuration files to help with other
2534 OS variants using glibc.
2536 85. One more patch for Sieve to update vacation handling to latest spec.
2539 ----------------------------------------------------
2540 See the note above about the 4.44 and 4.50 releases.
2541 ----------------------------------------------------
2547 1. Change 4.43/35 introduced a bug that caused file counts to be
2548 incorrectly computed when quota_filecount was set in an appendfile
2551 2. Closing a stable door: arrange to panic-die if setitimer() ever fails. The
2552 bug fixed in 4.43/37 would have been diagnosed quickly if this had been in
2555 3. Give more explanation in the error message when the command for a transport
2556 filter fails to execute.
2558 4. There are several places where Exim runs a non-Exim command in a
2559 subprocess. The SIGUSR1 signal should be disabled for these processes. This
2560 was being done only for the command run by the queryprogram router. It is
2561 now done for all such subprocesses. The other cases are: ${run, transport
2562 filters, and the commands run by the lmtp and pipe transports.
2564 5. Some older OS have a limit of 256 on the maximum number of file
2565 descriptors. Exim was using setrlimit() to set 1000 as a large value
2566 unlikely to be exceeded. Change 4.43/17 caused a lot of logging on these
2567 systems. I've change it so that if it can't get 1000, it tries for 256.
2569 6. "control=submission" was allowed, but had no effect, in a DATA ACL. This
2570 was an oversight, and furthermore, ever since the addition of extra
2571 controls (e.g. 4.43/32), the checks on when to allow different forms of
2572 "control" were broken. There should now be diagnostics for all cases when a
2573 control that does not make sense is encountered.
2575 7. $recipients is now available in the predata ACL (oversight).
2577 8. Tidy the search cache before the fork to do a delivery from a message
2578 received from the command line. Otherwise the child will trigger a lookup
2579 failure and thereby defer the delivery if it tries to use (for example) a
2580 cached ldap connection that the parent has called unbind on.
2582 9. If verify=recipient was followed by verify=sender in a RCPT ACL, the value
2583 of $address_data from the recipient verification was clobbered by the
2584 sender verification.
2586 10. If FIXED_NEVER_USERS was defined, but empty, Exim was assuming the uid 0
2587 was its contents. (It was OK if the option was not defined at all.)
2589 11. A "Completed" log line is now written for messages that are removed from
2590 the spool by the -Mrm option.
2592 12. $host_address is now set to the target address during the checking of
2593 ignore_target_hosts.
2595 13. When checking ignore_target_hosts for an ipliteral router, no host name was
2596 being passed; this would have caused $sender_host_name to have been used if
2597 matching the list had actually called for a host name (not very likely,
2598 since this list is usually IP addresses). A host name is now passed as
2601 14. Changed the calls that set up the SIGCHLD handler in the daemon to use the
2602 code that specifies a non-restarting handler (typically sigaction() in
2603 modern systems) in an attempt to fix a rare and obscure crash bug.
2605 15. Narrowed the window for a race in the daemon that could cause it to ignore
2606 SIGCHLD signals. This is not a major problem, because they are used only to
2607 wake it up if nothing else does.
2609 16. A malformed maildirsize file could cause Exim to calculate negative values
2610 for the mailbox size or file count. Odd effects could occur as a result.
2611 The maildirsize information is now recalculated if the size or filecount
2614 17. Added HAVE_SYS_STATVFS_H to the os.h file for Linux, as it has had this
2615 support for a long time. Removed HAVE_SYS_VFS_H.
2617 18. Updated exipick to current release from John Jetmore.
2619 19. Allow an empty sender to be matched against a lookup in an address list.
2620 Previously the only cases considered were a regular expression, or an
2623 20. Exim went into a mad DNS lookup loop when doing a callout where the
2624 host was specified on the transport, if the DNS lookup yielded more than
2627 21. The RFC2047 encoding function was originally intended for short strings
2628 such as real names; it was not keeping to the 75-character limit for
2629 encoded words that the RFC imposes. It now respects the limit, and
2630 generates multiple encoded words if necessary. To be on the safe side, I
2631 have increased the buffer size for the ${rfc2047: expansion operator from
2634 22. Failure to deliver a bounce message always caused it to be frozen, even if
2635 there was an errors_to setting on the router. The errors_to setting is now
2638 23. If an IPv6 address is given for -bh or -bhc, it is now converted to the
2639 canonical form (fully expanded) before being placed in
2640 $sender_host_address.
2642 24. Updated eximstats to version 1.33
2644 25. Include certificate and key file names in error message when GnuTLS fails
2645 to set them up, because the GnuTLS error message doesn't include the name
2646 of the failing file when there is a problem reading it.
2648 26. Expand error message when OpenSSL has problems setting up cert/key files.
2651 27. Reset the locale to "C" after calling embedded Perl, in case it was changed
2652 (this can affect the format of dates).
2654 28. exim_tidydb, when checking for the continued existence of a message for
2655 which it has found a message-specific retry record, was not finding
2656 messages that were in split spool directories. Consequently, it was
2657 deleting retry records that should have stayed in existence.
2659 29. eximstats updated to version 1.35
2660 1.34 - allow eximstats to parse syslog lines as well as mainlog lines
2661 1.35 - bugfix such that pie charts by volume are generated correctly
2663 30. The SPA authentication driver was not abandoning authentication and moving
2664 on to the next authenticator when an expansion was forced to fail,
2665 contradicting the general specification for all authenticators. Instead it
2666 was generating a temporary error. It now behaves as specified.
2668 31. The default ordering of permitted cipher suites for GnuTLS was pessimal
2669 (the order specifies the preference for clients). The order is now AES256,
2670 AES128, 3DES, ARCFOUR128.
2672 31. Small patch to Sieve code - explicitly set From: when generating an
2675 32. Exim crashed if a remote delivery caused a very long error message to be
2676 recorded - for instance if somebody sent an entire SpamAssassin report back
2677 as a large number of 550 error lines. This bug was coincidentally fixed by
2678 increasing the size of one of Exim's internal buffers (big_buffer) that
2679 happened as part of the Exiscan merge. However, to be on the safe side, I
2680 have made the code more robust (and fixed the comments that describe what
2683 33. Some experimental protocols are using DNS PTR records for new purposes. The
2684 keys for these records are domain names, not reversed IP addresses. The
2685 dnsdb PTR lookup now tests whether its key is an IP address. If not, it
2686 leaves it alone. Component reversal etc. now happens only for IP addresses.
2689 34. The host_aton() function is supposed to be passed a string that is known
2690 to be a valid IP address. However, in the case of IPv6 addresses, it was
2691 not checking this. This is a hostage to fortune. Exim now panics and dies
2692 if the condition is not met. A case was found where this could be provoked
2693 from a dnsdb PTR lookup with an IPv6 address that had more than 8
2694 components; fortuitously, this particular loophole had already been fixed
2695 by change 4.50/55 or 4.44/33 above.
2697 If there are any other similar loopholes, the new check in host_aton()
2698 itself should stop them being exploited. The report I received stated that
2699 data on the command line could provoke the exploit when Exim was running as
2700 exim, but did not say which command line option was involved. All I could
2701 find was the use of -be with a bad dnsdb PTR lookup, and in that case it is
2702 running as the user.
2705 35. There was a buffer overflow vulnerability in the SPA authentication code
2706 (which came originally from the Samba project). I have added a test to the
2707 spa_base64_to_bits() function which I hope fixes it.
2710 36. The daemon start-up calls getloadavg() while still root for those OS that
2711 need the first call to be done as root, but it missed one case: when
2712 deliver_queue_load_max is set with deliver_drop_privilege. This is
2713 necessary for the benefit of the queue runner, because there is no re-exec
2714 when deliver_drop_privilege is set.
2716 37. Caching of lookup data for "hosts =" ACL conditions, when a named host list
2717 was in use, was not putting the data itself into the right store pool;
2718 consequently, it could be overwritten for a subsequent message in the same
2719 SMTP connection. (Fix 4.40/11 dealt with the non-cache case, but overlooked
2722 38. Sometimes the final signoff response after QUIT could fail to get
2723 transmitted in the non-TLS case. Testing !tls_active instead of tls_active
2724 < 0 before doing a fflush(). This bug looks as though it goes back to the
2725 introduction of TLS in release 3.20, but "sometimes" must have been rare
2726 because the tests only now provoked it.
2732 1. Fixed a longstanding but relatively impotent bug: a long time ago, before
2733 PIPELINING, the function smtp_write_command() used to return TRUE or FALSE.
2734 Now it returns an integer. A number of calls were still expecting a T/F
2735 return. Fortuitously, in all cases, the tests worked in OK situations,
2736 which is the norm. However, things would have gone wrong on any write
2737 failures on the smtp file descriptor. This function is used when sending
2738 messages over SMTP and also when doing verify callouts.
2740 2. When Exim is called to do synchronous delivery of a locally submitted
2741 message (the -odf or -odi options), it no longer closes stderr before doing
2744 3. Implemented the mua_wrapper option.
2746 4. Implemented mx_fail_domains and srv_fail_domains for the dnslookup router.
2748 5. Implemented the functions header_remove(), header_testname(),
2749 header_add_at_position(), and receive_remove_recipient(), and exported them
2752 6. If an ACL "warn" statement specified the addition of headers, Exim already
2753 inserted X-ACL-Warn: at the start if there was no header name. However, it
2754 was not making this test for the second and subsequent header lines if
2755 there were newlines in the string. This meant that an invalid header could
2756 be inserted if Exim was badly configured.
2758 7. Allow an ACL "warn" statement to add header lines at the start or after all
2759 the Received: headers, as well as at the end.
2761 8. Added the rcpt_4xx retry error code.
2763 9. Added postmaster_mailfrom=xxx to callout verification option.
2765 10. Added mailfrom=xxxx to the callout verification option, for verify=
2768 11. ${substr_1_:xxxx} and ${substr__3:xxxx} are now diagnosed as syntax errors
2769 (they previously behaved as ${substr_1_0:xxxx} and ${substr:_0_3:xxxx}).
2771 12. Inserted some casts to stop certain compilers warning when using pointer
2772 differences as field lengths or precisions in printf-type calls (mostly
2773 affecting debugging statements).
2775 13. Added optional readline() support for -be (dynamically loaded).
2777 14. Obscure bug fix: if a message error (e.g. 4xx to MAIL) happened within the
2778 same clock tick as a message's arrival, so that its received time was the
2779 same as the "first fail" time on the retry record, and that message
2780 remained on the queue past the ultimate address timeout, every queue runner
2781 would try a delivery (because it was past the ultimate address timeout) but
2782 after another failure, the ultimate address timeout, which should have then
2783 bounced the address, did not kick in. This was a "< instead of <=" error;
2784 in most cases the first failure would have been in the next clock tick
2785 after the received time, and all would be well.
2787 15. The special items beginning with @ in domain lists (e.g. @mx_any) were not
2788 being recognized when the domain list was tested by the match_domain
2789 condition in an expansion string.
2791 16. Added the ${str2b64: operator.
2793 17. Exim was always calling setrlimit() to set a large limit for the number of
2794 processes, without checking whether the existing limit was already
2795 adequate. (It did check for the limit on file descriptors.) Furthermore,
2796 errors from getrlimit() and setrlimit() were being ignored. Now they are
2797 logged to the main and panic logs, but Exim does carry on, to try to do its
2798 job under whatever limits there are.
2800 18. Imported PCRE 5.0.
2802 19. Trivial typo in log message " temporarily refused connection" (the leading
2805 20. If the log selector return_path_on_delivery was set and an address was
2806 redirected to /dev/null, the delivery process crashed because it assumed
2807 that a return path would always be set for a "successful" delivery. In this
2808 case, the whole delivery is bypassed as an optimization, and therefore no
2811 21. Internal re-arrangement: the function for sending a challenge and reading
2812 a response while authentication was assuming a zero-terminated challenge
2813 string. It's now changed to take a pointer and a length, to allow for
2814 binary data in such strings.
2816 22. Added the cyrus_sasl authenticator (code supplied by MBM).
2818 23. Exim was not respecting finduser_retries when seeking the login of the
2819 uid under which it was called; it was always trying 10 times. (The default
2820 setting of finduser_retries is zero.) Also, it was sleeping after the final
2821 failure, which is pointless.
2823 24. Implemented tls_on_connect_ports.
2825 25. Implemented acl_smtp_predata.
2827 26. If the domain in control=submission is set empty, Exim assumes that the
2828 authenticated id is a complete email address when it generates From: or
2829 Sender: header lines.
2831 27. Added "#define SOCKLEN_T int" to OS/os.h-SCO and OS/os.h-SCO_SV. Also added
2832 definitions to OS/Makefile-SCO and OS/Makefile-SCO_SV that put basename,
2833 chown and chgrp in /bin and hostname in /usr/bin.
2835 28. Exim was keeping the "process log" file open after each use, just as it
2836 does for the main log. This opens the possibility of it remaining open for
2837 long periods when the USR1 signal hits a daemon. Occasional processlog
2838 errors were reported, that could have been caused by this. Anyway, it seems
2839 much more sensible not to leave this file open at all, so that is what now
2842 29. The long-running daemon process does not normally write to the log once it
2843 has entered its main loop, and it closes the log before doing so. This is
2844 so that log files can straightforwardly be renamed and moved. However,
2845 there are a couple of unusual error situations where the daemon does write
2846 log entries, and I had neglected to close the log afterwards.
2848 30. The text of an SMTP error response that was received during a remote
2849 delivery was being truncated at 512 bytes. This is too short for some of
2850 the long messages that one sometimes sees. I've increased the limit to
2853 31. It is now possible to make retry rules that apply only when a message has a
2854 specific sender, in particular, an empty sender.
2856 32. Added "control = enforce_sync" and "control = no_enforce_sync". This makes
2857 it possible to be selective about when SMTP synchronization is enforced.
2859 33. Added "control = caseful_local_part" and "control = "caselower_local_part".
2861 32. Implemented hosts_connection_nolog.
2863 33. Added an ACL for QUIT.
2865 34. Setting "delay_warning=" to disable warnings was not working; it gave a
2868 35. Added mailbox_size and mailbox_filecount to appendfile.
2870 36. Added control = no_multiline_responses to ACLs.
2872 37. There was a bug in the logic of the code that waits for the clock to tick
2873 in the case where the clock went backwards by a substantial amount such
2874 that the microsecond fraction of "now" was more than the microsecond
2875 fraction of "then" (but the whole seconds number was less).
2877 38. Added support for the libradius Radius client library this is found on
2878 FreeBSD (previously only the radiusclient library was supported).
2884 1. When certain lookups returned multiple values in the form name=value, the
2885 quoting of the values was not always being done properly. Specifically:
2886 (a) If the value started with a double quote, but contained no whitespace,
2888 (b) If the value contained whitespace other than a space character (i.e.
2889 tabs or newlines or carriage returns) it was not quoted.
2890 This fix has been applied to the mysql and pgsql lookups by writing a
2891 separate quoting function and calling it from the lookup code. The fix
2892 should probably also be applied to nisplus, ibase and oracle lookups, but
2893 since I cannot test any of those, I have not disturbed their existing code.
2895 2. A hit in the callout cache for a specific address caused a log line with no
2896 reason for rejecting RCPT. Now it says "Previous (cached) callout
2897 verification failure".
2899 3. There was an off-by-one bug in the queryprogram router. An over-long
2900 return line was truncated at 256 instead of 255 characters, thereby
2901 overflowing its buffer with the terminating zero. As well as fixing this, I
2902 have increased the buffer size to 1024 (and made a note to document this).
2904 4. If an interrupt, such as the USR1 signal that is send by exiwhat, arrives
2905 when Exim is waiting for an SMTP response from a remote server, Exim
2906 restarts its select() call on the socket, thereby resetting its timeout.
2907 This is not a problem when such interrupts are rare. Somebody set up a cron
2908 job to run exiwhat every 2 minutes, which is less than the normal select()
2909 timeout (5 or 10 minutes). This meant that the select() timeout never
2910 kicked in because it was always reset. I have fixed this by comparing the
2911 time when an interrupt arrives with the time at the start of the first call
2912 to select(). If more time than the timeout has elapsed, the interrupt is
2913 treated as a timeout.
2915 5. Some internal re-factoring in preparation for the addition of Sieve
2916 extensions (by MH). In particular, the "personal" test is moved to a
2917 separate function, and given an option for scanning Cc: and Bcc: (which is
2918 not set for Exim filters).
2920 6. When Exim created an email address using the login of the caller as the
2921 local part (e.g. when creating a From: or Sender: header line), it was not
2922 quoting the local part when it contained special characters such as @.
2924 7. Installed new OpenBSD configuration files.
2926 8. Reworded some messages for syntax errors in "and" and "or" conditions to
2927 try to make them clearer.
2929 9. Callout options, other than the timeout value, were being ignored when
2930 verifying sender addresses in header lines. For example, when using
2932 verify = header_sender/callout=no_cache
2934 the cache was (incorrectly) being used.
2936 10. Added a missing instance of ${EXE} to the exim_install script; this affects
2937 only the Cygwin environment.
2939 11. When return_path_on_delivery was set as a log selector, if different remote
2940 addresses in the same message used different return paths and parallel
2941 remote delivery occurred, the wrong values would sometimes be logged.
2942 (Whenever a remote delivery process finished, the return path value from
2943 the most recently started remote delivery process was logged.)
2945 12. RFC 3848 specifies standard names for the "with" phrase in Received: header
2946 lines when AUTH and/or TLS are in use. This is the "received protocol"
2947 field. Exim used to use "asmtp" for authenticated SMTP, without any
2948 indication (in the protocol name) for TLS use. Now it follows the RFC and
2949 uses "esmtpa" if the connection is authenticated, "esmtps" if it is
2950 encrypted, and "esmtpsa" if it is both encrypted and authenticated. These
2951 names appear in log lines as well as in Received: header lines.
2953 13. Installed MH's patches for Sieve to add the "copy" and "vacation"
2954 extensions, and comparison tests, and to fix some bugs.
2956 14. Changes to the "personal" filter test:
2958 (1) The test was buggy in that it was just doing the equivalent of
2959 "contains" tests on header lines. For example, if a user's address was
2960 anne@some.where, the "personal" test would incorrectly be true for
2962 To: susanne@some.where
2964 This test is now done by extracting each address from the header in turn,
2965 and checking the entire address. Other tests that are part of "personal"
2966 are now done using regular expressions (for example, to check local parts
2967 of addresses in From: header lines).
2969 (2) The list of non-personal local parts in From: addresses has been
2970 extended to include "listserv", "majordomo", "*-request", and "owner-*",
2971 taken from the Sieve specification recommendations.
2973 (3) If the message contains any header line starting with "List-" it is
2974 treated as non-personal.
2976 (4) The test for "circular" in the Subject: header line has been removed
2977 because it now seems ill-conceived.
2979 15. Minor typos in src/EDITME comments corrected.
2981 16. Installed latest exipick from John Jetmore.
2983 17. If headers_add on a router specified a text string that was too long for
2984 string_sprintf() - that is, longer than 8192 bytes - Exim panicked. The use
2985 of string_sprintf() is now avoided.
2987 18. $message_body_size was not set (it was always zero) when running the DATA
2988 ACL and the local_scan() function.
2990 19. For the "mail" command in an Exim filter, no default was being set for
2991 the once_repeat time, causing a random time value to be used if "once" was
2992 specified. (If the value happened to be <= 0, no repeat happened.) The
2993 default is now 0s, meaning "never repeat". The "vacation" command was OK
2994 (its default is 7d). It's somewhat surprising nobody ever noticed this bug
2995 (I found it when inspecting the code).
2997 20. There is now an overall timeout for performing a callout verification. It
2998 defaults to 4 times the callout timeout, which applies to individual SMTP
2999 commands during the callout. The overall timeout applies when there is more
3000 than one host that can be tried. The timeout is checked before trying the
3001 next host. This prevents very long delays if there are a large number of
3002 hosts and all are timing out (e.g. when the network connections are timing
3003 out). The value of the overall timeout can be changed by specifying an
3004 additional sub-option for "callout", called "maxwait". For example:
3006 verify = sender/callout=5s,maxwait=20s
3008 21. Add O_APPEND to the open() call for maildirsize files (Exim already seeks
3009 to the end before writing, but this should make it even safer).
3011 22. Exim was forgetting that it had advertised PIPELINING for the second and
3012 subsequent messages on an SMTP connection. It was also not resetting its
3013 memory on STARTTLS and an internal HELO.
3015 23. When Exim logs an SMTP synchronization error within a session, it now
3016 records whether PIPELINING has been advertised or not.
3018 24. Added 3 instances of "(long int)" casts to time_t variables that were being
3019 formatted using %ld, because on OpenBSD (and perhaps others), time_t is int
3020 rather than long int.
3022 25. Installed the latest Cygwin configuration files from the Cygwin maintainer.
3024 26. Added the never_mail option to autoreply.
3030 1. A reorganization of the code in order to implement 4.40/8 caused a daemon
3031 crash if the getsockname() call failed; this can happen if a connection is
3032 closed very soon after it is established. The problem was simply in the
3033 order in which certain operations were done, causing Exim to try to write
3034 to the SMTP stream before it had set up the file descriptor. The bug has
3035 been fixed by making things happen in the correct order.
3041 1. If "drop" was used in a DATA ACL, the SMTP output buffer was not flushed
3042 before the connection was closed, thus losing the rejection response.
3044 2. Commented out the definition of SOCKLEN_T in os.h-SunOS5. It is needed for
3045 some early Solaris releases, but causes trouble in current releases where
3046 socklen_t is defined.
3048 3. When std{in,out,err} are closed, re-open them to /dev/null so that they
3051 4. Minor refactoring of os.c-Linux to avoid compiler warning when IPv6 is not
3054 5. Refactoring in expand.c to improve memory usage. Pre-allocate a block so
3055 that releasing the top of it at the end releases what was used for sub-
3056 expansions (unless the block got too big). However, discard this block if
3057 the first thing is a variable or header, so that we can use its block when
3058 it is dynamic (useful for very large $message_headers, for example).
3060 6. Lookups now cache *every* query, not just the most recent. A new, separate
3061 store pool is used for this. It can be recovered when all lookup caches are
3062 flushed. Lookups now release memory at the end of their result strings.
3063 This has involved some general refactoring of the lookup sources.
3065 7. Some code has been added to the store_xxx() functions to reduce the amount
3066 of flapping under certain conditions.
3068 8. log_incoming_interface used to affect only the <= reception log lines. Now
3069 it causes the local interface and port to be added to several more SMTP log
3070 lines, for example "SMTP connection from", and rejection lines.
3072 9. The Sieve author supplied some patches for the doc/README.SIEVE file.
3074 10. Added a conditional definition of _BSD_SOCKLEN_T to os.h-Darwin.
3076 11. If $host_data was set by virtue of a hosts lookup in an ACL, its value
3077 could be overwritten at the end of the current message (or the start of a
3078 new message if it was set in a HELO ACL). The value is now preserved for
3079 the duration of the SMTP connection.
3081 12. If a transport had a headers_rewrite setting, and a matching header line
3082 contained an unqualified address, that address was qualified, even if it
3083 did not match any rewriting rules. The underlying bug was that the values
3084 of the flags that permit the existence of unqualified sender and recipient
3085 addresses in header lines (set by {sender,recipient}_unqualified_hosts for
3086 non-local messages, and by -bnq for local messages) were not being
3087 preserved with the message after it was received.
3089 13. When Exim was logging an SMTP synchronization error, it could sometimes log
3090 "next input=" as part of the text comprising the host identity instead of
3091 the correct text. The code was using the same buffer for two different
3092 strings. However, depending on which order the printing function evaluated
3093 its arguments, the bug did not always show up. Under Linux, for example, my
3094 test suite worked just fine.
3096 14. Exigrep contained a use of Perl's "our" scoping after change 4.31/70. This
3097 doesn't work with some older versions of Perl. It has been changed to "my",
3098 which in any case is probably the better facility to use.
3100 15. A really picky compiler found some instances of statements for creating
3101 error messages that either had too many or two few arguments for the format
3104 16. The size of the buffer for calls to the DNS resolver has been increased
3105 from 1024 to 2048. A larger buffer is needed when performing PTR lookups
3106 for addresses that have a lot of PTR records. This alleviates a problem; it
3107 does not fully solve it.
3109 17. A dnsdb lookup for PTR records that receives more data than will fit in the
3110 buffer now truncates the list and logs the incident, which is the same
3111 action as happens when Exim is looking up a host name and its aliases.
3112 Previously in this situation something unpredictable would happen;
3113 sometimes it was "internal error: store_reset failed".
3115 18. If a server dropped the connection unexpectedly when an Exim client was
3116 using GnuTLS and trying to read a response, the client delivery process
3117 crashed while trying to generate an error log message.
3119 19. If a "warn" verb in an ACL added multiple headers to a message in a single
3120 string, for example:
3122 warn message = H1: something\nH2: something
3124 the text was added as a single header line from Exim's point of view
3125 though it ended up OK in the delivered message. However, searching for the
3126 second and subsequent header lines using $h_h2: did not work. This has been
3127 fixed. Similarly, if a system filter added multiple headers in this way,
3128 the routers could not see them.
3130 20. Expanded the error message when iplsearch is called with an invalid key to
3131 suggest using net-iplsearch in a host list.
3133 21. When running tests using -bh, any delays imposed by "delay" modifiers in
3134 ACLs are no longer actually imposed (and a message to that effect is
3137 22. If a "gecos" field in a passwd entry contained escaped characters, in
3138 particular, if it contained a \" sequence, Exim got it wrong when building
3139 a From: or a Sender: header from that name. A second bug also caused
3140 incorrect handling when an unquoted " was present following a character
3141 that needed quoting.
3143 23. "{crypt}" as a password encryption mechanism for a "crypteq" expansion item
3144 was not being matched caselessly.
3146 24. Arranged for all hyphens in the exim.8 source to be escaped with
3149 25. Change 16 of 4.32, which reversed 71 or 4.31 didn't quite do the job
3150 properly. Recipient callout cache records were still being keyed to include
3151 the sender, even when use_sender was set false. This led to far more
3152 callouts that were necessary. The sender is no longer included in the key
3153 when use_sender is false.
3155 26. Added "control = submission" modifier to ACLs.
3157 27. Added the ${base62d: operator to decode base 62 numbers.
3159 28. dnsdb lookups can now access SRV records.
3161 29. CONFIGURE_OWNER can be set at build time to define an alternative owner for
3162 the configuration file.
3164 30. The debug message "delivering xxxxxx-xxxxxx-xx" is now output in verbose
3165 (-v) mode. This makes the output for a verbose queue run more intelligible.
3167 31. Added a use_postmaster feature to recipient callouts.
3169 32. Added the $body_zerocount variable, containing the number of binary zero
3170 bytes in the message body.
3172 33. The time of last modification of the "new" subdirectory is now used as the
3173 "mailbox time last read" when there is a quota error for a maildir
3176 34. Added string comparison operators lt, lti, le, lei, gt, gti, ge, gei.
3178 35. Added +ignore_unknown as a special item in host lists.
3180 36. Code for decoding IPv6 addresses in host lists is now included, even if
3181 IPv6 support is not being compiled. This fixes a bug in which an IPv6
3182 address was recognized as an IP address, but was then not correctly decoded
3183 into binary, causing unexpected and incorrect effects when compared with
3190 1. Very minor rewording of debugging text in manualroute to say "list of
3191 hosts" instead of "hostlist".
3193 2. If verify=header_syntax was set, and a header line with an unqualified
3194 address (no domain) and a large number of spaces between the end of the
3195 name and the colon was received, the reception process suffered a buffer
3196 overflow, and (when I tested it) crashed. This was caused by some obsolete
3197 code that should have been removed. The fix is to remove it!
3199 3. When running in the test harness, delay a bit after writing a bounce
3200 message to get a bit more predictability in the log output.
3202 4. Added a call to search_tidyup() just before forking a reception process. In
3203 theory, someone could use a lookup in the expansion of smtp_accept_max_
3204 per_host which, without the tidyup, could leave open a database connection.
3206 5. Added the variables $recipient_data and $sender_data which get set from a
3207 lookup success in an ACL "recipients" or "senders" condition, or a router
3208 "senders" option, similar to $domain_data and $local_part_data.
3210 6. Moved the writing of debug_print from before to after the "senders" test
3213 7. Change 4.31/66 (moving the time when the Received: is generated) caused
3214 problems for message scanning, either using a data ACL, or using
3215 local_scan() because the Received: header was not generated till after they
3216 were called (in order to set the time as the time of reception completion).
3217 I have revised the way this works. The header is now generated after the
3218 body is received, but before the ACL or local_scan() are called. After they
3219 are run, the timestamp in the header is updated.
3225 1. Change 4.24/6 introduced a bug because the SIGALRM handler was disabled
3226 before starting a queue runner without re-exec. This happened only when
3227 deliver_drop_privilege was set or when the Exim user was set to root. The
3228 effect of the bug was that timeouts during subsequent deliveries caused
3229 crashes instead of being properly handled. The handler is now left at its
3230 default (and expected) setting.
3232 2. The other case in which a daemon avoids a re-exec is to deliver an incoming
3233 message, again when deliver_drop_privilege is set or Exim is run as root.
3234 The bug described in (1) was not present in this case, but the tidying up
3235 of the other signals was missing. I have made the two cases consistent.
3237 3. The ignore_target_hosts setting on a manualroute router was being ignored
3238 for hosts that were looked up using the /MX notation.
3240 4. Added /ignore=<ip list> feature to @mx_any, @mx_primary, and @mx_secondary
3243 5. Change 4.31/55 was buggy, and broke when there was a rewriting rule that
3244 operated on the sender address. After changing the $sender_address to <>
3245 for the sender address verify, Exim was re-instated it as the original
3246 (before rewriting) address, but remembering that it had rewritten it, so it
3247 wasn't rewriting it again. This bug also had the effect of breaking the
3248 sender address verification caching when the sender address was rewritten.
3250 6. The ignore_target_hosts option was being ignored by the ipliteral router.
3251 This has been changed so that if the ip literal address matches
3252 ignore_target_hosts, the router declines.
3254 7. Added expansion conditions match_domain, match_address, and match_local_
3255 part (NOT match_host).
3257 8. The placeholder for the Received: header didn't have a length field set.
3259 9. Added code to Exim itself and to exim_lock to test for a specific race
3260 condition that could lead to file corruption when using MBX delivery. The
3261 issue is with the lockfile that is created in /tmp. If this file is removed
3262 after a process has opened it but before that process has acquired a lock,
3263 there is the potential for a second process to recreate the file and also
3264 acquire a lock. This could lead to two Exim processes writing to the file
3265 at the same time. The added code performs the same test as UW imapd; it
3266 checks after acquiring the lock that its file descriptor still refers to
3267 the same named file.
3269 10. The buffer for building added header lines was of fixed size, 8192 bytes.
3270 It is now parameterized by HEADER_ADD_BUFFER_SIZE and this can be adjusted
3273 11. Added the smtp_active_hostname option. If used, this will typically be made
3274 to depend on the incoming interface address. Because $interface_address is
3275 not set up until the daemon has forked a reception process, error responses
3276 that can happen earlier (such as "too many connections") no longer contain
3279 12. If an expansion in a condition on a "warn" statement fails because a lookup
3280 defers, the "warn" statement is abandoned, and the next ACL statement is
3281 processed. Previously this caused the whole ACL to be aborted.
3283 13. Added the iplsearch lookup type.
3285 14. Added ident_timeout as a log selector.
3287 15. Added tls_certificate_verified as a log selector.
3289 16. Added a global option tls_require_ciphers (compare the smtp transport
3290 option of the same name). This controls incoming TLS connections.
3292 17. I finally figured out how to make tls_require_ciphers do a similar thing
3293 in GNUtls to what it does in OpenSSL, that is, set up an appropriate list
3294 before starting the TLS session.
3296 18. Tabs are now shown as \t in -bP output.
3298 19. If the log selector return_path_on_delivery was set, Exim crashed when
3299 bouncing a message because it had too many Received: header lines.
3301 20. If two routers both had headers_remove settings, and the first one included
3302 a superfluous trailing colon, the final name in the first list and the
3303 first name in the second list were incorrectly joined into one item (with a
3304 colon in the middle).
3310 1. Added -C and -D options to the exinext utility, mainly to make it easier
3311 to include in the automated testing, but these could be helpful when
3312 multiple configurations are in use.
3314 2. The exinext utility was not formatting the output nicely when there was
3315 an alternate port involved in the retry record key, nor when there was a
3316 message id as well (for retries that were specific to a specific message
3317 and a specific host). It was also confused by IPv6 addresses, because of
3318 the additional colons they contain. I have fixed the IPv4 problem, and
3319 patched it up to do a reasonable job for IPv6.
3321 3. When there is an error after a MAIL, RCPT, or DATA SMTP command during
3322 delivery, the log line now contains "pipelined" if PIPELINING was used.
3324 4. An SMTP transport process used to panic and die if the bind() call to set
3325 an explicit outgoing interface failed. This has been changed; it is now
3326 treated in the same way as a connect() failure.
3328 5. A reference to $sender_host_name in the part of a conditional expansion
3329 that was being skipped was still causing a DNS lookup. This no longer
3332 6. The def: expansion condition was not recognizing references to header lines
3333 that used bh_ and bheader_.
3335 7. Added the _cache feature to named lists.
3337 8. The code for checking quota_filecount in the appendfile transport was
3338 allowing one more file than it should have been.
3340 9. For compatibility with Sendmail, the command line option
3348 and sets the incoming protocol and host name (for trusted callers). The
3349 host name and its colon can be omitted when only the protocol is to be set.
3350 Note the Exim already has two private options, -pd and -ps, that refer to
3351 embedded Perl. It is therefore impossible to set a protocol value of "d" or
3352 "s", but I don't think that's a major issue.
3354 10. A number of refactoring changes to the code, none of which should affect
3357 (a) The number of logging options was getting close to filling up the
3358 32-bit word that was used as a bit map. I have split them into two classes:
3359 those that are passed in the argument to log_write(), and those that are
3360 only ever tested independently outside of that function. These are now in
3361 separate 32-bit words, so there is plenty of room for expansion again.
3362 There is no change in the user interface or the logging behaviour.
3364 (b) When building, for example, log lines, the code previously used a
3365 macro that called string_cat() twice, in order to add two strings. This is
3366 not really sufficiently general. Furthermore, there was one instance where
3367 it was actually wrong because one of the argument was used twice, and in
3368 one call a function was used. (As it happened, calling the function twice
3369 did not affect the overall behaviour.) The macro has been replaced by a
3370 function that can join an arbitrary number of extra strings onto a growing
3373 (c) The code for expansion conditions now uses a table and a binary chop
3374 instead of a serial search (which was left over from when there were very
3375 few conditions). Also, it now recognizes conditions like "pam" even when
3376 the relevant support is not compiled in: a suitably worded error message is
3377 given if an attempt is made to use such a condition.
3379 11. Added ${time_interval:xxxxx}.
3381 12. A bug was causing one of the ddress fields not to be passed back correctly
3382 from remote delivery subprocesses. The field in question was not being
3383 subsequently used, so this caused to problems in practice.
3385 13. Added new log selectors queue_time and deliver_time.
3387 14. Might have fixed a bug in maildirsizefile handling that threw up
3388 "unexpected character" debug warnings, and recalculated the data
3389 unnecessarily. In any case, I expanded the warning message to give more
3392 15. Added the message "Restricted characters in address" to the statements in
3393 the default ACL that block characters like @ and % in local parts.
3395 16. Change 71 for release 4.31 proved to be much less benign that I imagined.
3396 Three changes have been made:
3398 (a) There was a serious bug; a negative response to MAIL caused the whole
3399 recipient domain to be cached as invalid, thereby blocking all messages
3400 to all local parts at the same domain, from all senders. This bug has
3401 been fixed. The domain is no longer cached after a negative response to
3402 MAIL if the sender used is not empty.
3404 (b) The default behaviour of using MAIL FROM:<> for recipient callouts has
3407 (c) A new callout option, "use_sender" has been added for people who want
3408 the modified behaviour.
3414 1. Removed "EXTRALIBS=-lwrap" from OS/Makefile-Unixware7 on the advice of
3417 2. Removed "LIBS = -lresolv" from OS/Makefile-Darwin as it is not needed, and
3418 indeed breaks things for older releases.
3420 3. Added additional logging to the case where there is a problem reading data
3421 from a filter that is running in a subprocess using a pipe, in order to
3422 try to track down a specific problem.
3424 4. Testing facility fudge: when running in the test harness and attempting
3425 to connect to 10.x.x.x (expecting a connection timeout) I'm now sometimes
3426 getting "No route to host". Convert this to a timeout.
3428 5. Define ICONV_ARG2_TYPE as "char **" for Unixware7 to avoid compiler
3431 6. Some OS don't have socklen_t but use size_t instead. This affects the
3432 fifth argument of getsockopt() amongst other things. This is now
3433 configurable by a macro called SOCKLEN_T which defaults to socklen_t, but
3434 can be set for individual OS. I have set it for SunOS5, OSF1, and
3435 Unixware7. Current versions of SunOS5 (aka Solaris) do have socklen_t, but
3436 some earlier ones do not.
3438 7. Change 4.30/15 was not doing the test caselessly.
3440 8. The standard form for an IPv6 address literal was being rejected by address
3441 parsing in, for example, MAIL and RCPT commands. An example of this kind of
3442 address is [IPv6:2002:c1ed:8229:10:202:2dff:fe07:a42a]. Exim now accepts
3443 this, as well as the form without the "IPv6" on the front (but only when
3444 address literals are enabled, of course).
3446 9. Added some casts to avoid compiler warnings in OS/os.c-Linux.
3448 10. Exim crashed if a message with an empty sender address specified by -f
3449 encountered a router with an errors_to setting. This could be provoked only
3450 by a command such as
3454 where an empty string was supplied; "<>" did not hit this bug.
3456 11. Installed PCRE release 4.5.
3458 12. If EHLO/HELO was rejected by an ACL, the value of $sender_helo_name
3459 remained set. It is now erased.
3461 13. exiqgrep wasn't working on MacOS X because it didn't correctly compute
3462 times from message ids (which are base 36 rather than the normal 62).
3464 14. "Expected" SMTP protocol errors that can arise when PIPELINING is in use
3465 were being counted as actual protocol errors, and logged if the log
3466 selector +smtp_protocol_error was set. One cannot be perfect in this test,
3467 but now, if PIPELINING has been advertised, RCPT following a rejected MAIL,
3468 and DATA following a set of rejected RCPTs do not count as protocol errors.
3469 In other words, Exim assumes they were pipelined, though this may not
3470 actually be the case. Of course, in all cases the client gets an
3471 appropriate error code.
3473 15. If a lookup fails in an ACL condition, a message about the failure may
3474 be available; it is used if testing the ACL cannot continue, because most
3475 such messages specify what the cause of the deferral is. However, some
3476 messages (e.g. "MYSQL: no data found") do not cause a defer. There was bug
3477 that caused an old message to be retained and used if a later statement
3478 caused a defer, replacing the real cause of the deferral.
3480 16. If an IP address had so many PTR records that the DNS lookup buffer
3481 was not large enough to hold them, Exim could crash while trying to process
3482 the truncated data. It now detects and logs this case.
3484 17. Further to 4.21/58, another change has been made: if (and only if) the
3485 first line of a message (the first header line) ends with CRLF, a bare LF
3486 in a subsequent header line has a space inserted after it, so as not to
3487 terminate the header.
3489 18. Refactoring: tidied an ugly bit of code in appendfile that copied data
3490 unnecessarily, used atoi() instead of strtol(), and didn't check the
3491 termination when getting file sizes from file names by regex.
3493 19. Completely re-implemented the support for maildirsize files, in the light
3494 of a number of problems with the previous contributed implementation
3495 (4.30/29). In particular:
3497 . If the quota is zero, the maildirsize file is maintained, but no quota is
3500 . If the maildir directory does not exist, it is created before any attempt
3501 to write a maildirsize file.
3503 . The quota value in the file is just a cache; if the quota is changed in
3504 the transport, the new value overrides.
3506 . A regular expression is available for excluding directories from the
3509 20. The autoreply transport checks the characters in options that define the
3510 message's headers; it allows continued headers, but it was checking with
3511 isspace() after an embedded newline instead of explicitly looking for a
3514 21. If all the "regular" hosts to which an address was routed had passed their
3515 expiry times, and had not reached their retry times, the address was
3516 bounced, even if fallback hosts were defined. Now Exim should go on to try
3519 22. Increased buffer sizes in the callout code from 1024 to 4096 to match the
3520 equivalent code in the SMTP transport. Some hosts send humungous responses
3521 to HELO/EHLO, more than 1024 it seems.
3523 23. Refactoring: code in filter.c used (void *) for "any old type" but this
3524 gives compiler warnings in some environments. I've now done it "properly",
3527 24. The replacement for inet_ntoa() that is used with gcc on IRIX systems
3528 (because of problems with the built-in one) was declared to return uschar *
3529 instead of char *, causing compiler failure.
3531 25. Fixed a file descriptor leak when processing alias/forward files.
3533 26. Fixed a minor format string issue in dbfn.c.
3535 27. Typo in exim.c: ("dmbnz" for "dbmnz").
3537 28. If a filter file refered to $h_xxx or $message_headers, and the headers
3538 contained RFC 2047 "words", Exim's memory could, under certain conditions,
3541 29. When a sender address is verified, it is cached, to save repeating the test
3542 when there is more than one recipient in a message. However, when the
3543 verification involves a callout, it is possible for different callout
3544 options to be set for different recipients. It is too complicated to keep
3545 track of this in the cache, so now Exim always runs a verification when a
3546 callout is required, relying on the callout cache for the optimization.
3547 The overhead is duplication of the address routing, but this should not be
3550 30. Fixed a bug in callout caching. If a RCPT command caused the sender address
3551 to be verified with callout=postmaster, and the main callout worked but the
3552 postmaster check failed, the verification correctly failed. However, if a
3553 subsequent RCPT command asked for sender verification *without* the
3554 postmaster check, incorrect caching caused this verification also to fail,
3557 31. Exim caches DNS lookup failures so as to avoid multiple timeouts; however,
3558 it was not caching the DNS options (qualify_single, search_parents) that
3559 were used when the lookup failed. A subsequent lookup with different
3560 options therefore always gave the same answer, though there were cases
3561 where it should not have. (Example: a "domains = !$mx_any" option on a
3562 dnslookup router: the "domains" option is always processed without any
3563 widening, but the router might have qualify_single set.) Now Exim uses the
3564 cached value only when the same options are set.
3566 32. Added John Jetmore's "exipick" utility to the distribution.
3568 33. GnuTLS: When an attempt to start a TLS session fails for any reason other
3569 than a timeout (e.g. a certificate is required, and is not provided), an
3570 Exim server now closes the connection immediately. Previously it waited for
3571 the client to close - but if the client is SSL, it seems that they each
3572 wait for each other, leading to a delay before one of them times out.
3574 34: GnuTLS: Updated the code to use the new GnuTLS 1.0.0 API. I have not
3575 maintained 0.8.x compatibility because I don't think many are using it, and
3576 it is clearly obsolete.
3578 35. Added TLS support for CRLs: a tls_crl global option and one for the smtp
3581 36. OpenSSL: $tls_certificate_verified was being set to 1 even if the
3582 client certificate was expired. A simple patch fixes this, though I don't
3583 understand the full logic of why the verify callback is called multiple
3586 37. OpenSSL: a patch from Robert Roselius: "Enable client-bug workaround.
3587 Versions of OpenSSL as of 0.9.6d include a 'CBC countermeasure' feature,
3588 which causes problems with some clients (such as the Certicom SSL Plus
3589 library used by Eudora). This option, SSL_OP_DONT_INSERT_EMPTY_FRAGMENTS,
3590 disables the coutermeasure allowing Eudora to connect."
3592 38. Exim was not checking that a write() to a log file succeeded. This could
3593 lead to Bad Things if a log got too big, in particular if it hit a file
3594 size limit. Exim now panics and dies if it cannot write to a log file, just
3595 as it does if it cannot open a log file.
3597 39. Modified OS/Makefile-Linux so that it now contains
3599 CFLAGS=-O -D_FILE_OFFSET_BITS=64 -D_LARGEFILE_SOURCE
3601 The two -D definitions ensure that Exim is compiled with large file
3602 support, which makes it possible to handle log files that are bigger than
3605 40. Fixed a subtle caching bug: if (in an ACL or a set of routers, for
3606 instance) a domain was checked against a named list that involved a lookup,
3607 causing $domain_data to be set, then another domain was checked against the
3608 same list, then the first domain was re-checked, the value of $domain_data
3609 after the final check could be wrong. In particular, if the second check
3610 failed, it could be set empty. This bug probably also applied to
3613 41. The strip_trailing_dot option was not being applied to the address given
3614 with the -f command-line option.
3616 42. The code for reading a message's header from the spool was incrementing
3617 $received_count, but never initializing it. This meant that the value was
3618 incorrect (doubled) while delivering a message in the same process in which
3619 it was received. In the most common configuration of Exim, this never
3620 happens - a fresh exec is done - but it can happen when
3621 deliver_drop_privilege is set.
3623 43. When Exim logs an SMTP synchronization error - client data sent too soon -
3624 it now includes up to 150 characters of the unexpected data in the log
3627 44. The exim_dbmbuild utility uses fixed size buffers for reading input lines
3628 and building data strings. The size of both of these buffers was 10 000
3629 bytes - far larger than anybody would *ever* want, thought I. Needless to
3630 say, somebody hit the limit. I have increased the maximum line length to
3631 20 000 and the maximum data length of concatenated lines to 100 000. I have
3632 also fixed two bugs, because there was no checking on these buffers. Tsk,
3633 tsk. Now exim_dbmbuild gives a message and exits with an error code if a
3634 buffer is too small.
3636 45. The exim_dbmbuild utility did not support quoted keys, as Exim does in
3637 lsearch lookups. Now it does.
3639 46. When parsing a route_list item in a manualroute router, a fixed-length
3640 buffer was used for the list of hosts. I made this 1024 bytes long,
3641 thinking that nobody would ever have a list of hosts that long. Wrong.
3642 Somebody had a whole pile of complicated expansion conditions, and the
3643 string was silently truncated, leading to an expansion error. It turns out
3644 that it is easier to change to an unlimited length (owing to other changes
3645 that have happened since this code was originally written) than to build
3646 structure for giving a limitation error. The length of the item that
3647 expands into the list of hosts is now unlimited.
3649 47. The lsearch lookup could not handle data where the length of text line was
3650 more than 4095 characters. Such lines were truncated, leading to shortened
3651 data being returned. It should now handle lines of any length.
3653 48. Minor wording revision: "cannot test xxx in yyy ACL" becomes "cannot test
3654 xxx condition in yyy ACL" (e.g. "cannot test domains condition in DATA
3657 49. Cosmetic tidy to scripts like exicyclog that are generated by globally
3658 replacing strings such as BIN_DIRECTORY in a source file: the replacement
3659 no longer happens in comment lines. A list of replacements is now placed
3660 at the head of all of the source files, except those whose only change is
3661 to replace PERL_COMMAND in the very first #! line.
3663 50. Replaced the slow insertion sort in queue.c, for sorting the list of
3664 messages on the queue, with a bottom-up merge sort, using code contributed
3665 by Michael Haardt. This should make operations like -bp somewhat faster on
3666 large queues. It won't affect queue runners, except when queue_run_in_order
3669 51. Installed eximstats 1.31 in the distribution.
3671 52. Added support for SRV lookups to the dnslookup router.
3673 53. If an ACL referred to $message_body or $message_body_end, the value was not
3674 reset for any messages that followed in the same SMTP session.
3676 54. The store-handling optimization for building very long strings was not
3677 differentiating between the different store pools. I don't think this
3678 actually made any difference in practice, but I've tidied it.
3680 55. While running the routers to verify a sender address, $sender_address
3681 was still set to the sender address. This is wrong, because when routing to
3682 send a bounce to the sender, it would be empty. Therefore, I have changed
3683 it so that, while verifying a sender address, $sender_address is set to <>.
3684 (There is no change to what happens when verifying a recipient address.)
3686 56. After finding MX (or SRV) records, Exim was doing a DNS lookup for the
3687 target A or AAAA records (if not already returned) without resetting the
3688 qualify_single or search_parents options of the DNS resolver. These are
3689 inappropriate in this case because the targets of MX and SRV records must
3690 be FQDNs. A broken DNS record could cause trouble if it happened to have a
3691 target that, when qualified, matched something in the local domain. These
3692 two options are now turned off when doing these lookups.
3694 57. It seems that at least some releases of Reiserfs (which does not have the
3695 concept of a fixed number of inodes) returns zero and not -1 for the
3696 number of available inodes. This interacted badly with check_spool_inodes,
3697 which assumed that -1 was the "no such thing" setting. What I have done is
3698 to check that the total number of inodes is greater than zero before doing
3699 the test of how many are available.
3701 58. When a "warn" ACL statement has a log_message modifier, the message is
3702 remembered, and not repeated. This is to avoid a lot of repetition when a
3703 message has many recipients that cause the same warning to be written.
3704 Howewer, Exim was preserving the list of already written lines for an
3705 entire SMTP session, which doesn't seem right. The memory is now reset if a
3706 new message is started.
3708 59. The "rewrite" debugging flag was not showing the result of rewriting in the
3709 debugging output unless log_rewrite was also set.
3711 60. Avoid a compiler warning on 64-bit systems in dsearch.c by avoiding the use
3712 of (int)(handle) when we know that handle contains (void *)(-1).
3714 61. The Exim daemon panic-logs an error return when it closes the incoming
3715 connection. However "connection reset by peer" seems to be common, and
3716 isn't really an error worthy of noting specially, so that particular error
3719 62. When Exim is trying to find all the local interfaces, it used to panic and
3720 die if the ioctl to get the interface flags failed. However, it seems that
3721 on at least one OS (Solaris 9) it is possible to have an interface that is
3722 included in the list of interfaces, but for which you get a failure error
3723 for this call. This happens when the interface is not "plumbed" into a
3724 protocol (i.e. neither IPv4 nor IPv6). I've changed the code so that a
3725 failure of the "get flags" call assumes that the interface is down.
3727 63. Added a ${eval10: operator, which assumes all numbers are decimal. This
3728 makes life easier for people who are doing arithmetic on fields extracted
3729 from dates, where you often get leading zeros that should not be
3730 interpreted as octal.
3732 64. Added qualify_domain to the redirect router, to override the global
3735 65. If a pathologically long header line contained very many addresses (the
3736 report of this problem mentioned 10 000) and each of them was rewritten,
3737 Exim could use up a very large amount of memory. (It kept on making new
3738 copies of the header line as it rewrote, and never released the old ones.)
3739 At the expense of a bit more processing, the header rewriting function has
3740 been changed so that it no longer eats memory in this way.
3742 66. The generation of the Received: header has been moved from the time that a
3743 message starts to be received, to the time that it finishes. The timestamp
3744 in the Received: header should now be very close to that of the <= log
3745 line. There are two side-effects of this change:
3747 (a) If a message is rejected by a DATA or non-SMTP ACL or local_scan(), the
3748 logged header lines no longer include the local Received: line, because
3749 it has not yet been created. The same applies to a copy of the message
3750 that is returned to a non-SMTP sender when a message is rejected.
3752 (b) When a filter file is tested using -bf, no additional Received: header
3753 is added to the test message. After some thought, I decided that this
3756 This change does not affect the value of $received_for. It is still set
3757 after address rewriting, but before local_scan() is called.
3759 67. Installed the latest Cygwin-specific files from the Cygwin maintainer.
3761 68. GnuTLS: If an empty file is specified for tls_verify_certificates, GnuTLS
3762 gave an unhelpful panic error message, and a defer error. I have managed to
3763 change this behaviour so that it now rejects any supplied certificate,
3764 which seems right, as the list of acceptable certificates is empty.
3766 69. OpenSSL: If an empty file is specified for tls_verify_certificates, OpenSSL
3767 gave an unhelpful defer error. I have not managed to make this reject any
3768 supplied certificates, but the error message it gives is "no certificate
3769 supplied", which is not helpful.
3771 70. exigrep's output now also includes lines that are not associated with any
3772 message, but which match the given pattern. Implemented by a patch from
3773 Martin Sluka, which also tidied up the Perl a bit.
3775 71. Recipient callout verification, like sender verification, was using <> in
3776 the MAIL FROM command. This isn't really the right thing, since the actual
3777 sender may affect whether the remote host accepts the recipient or not. I
3778 have changed it to use the actual sender in the callout; this means that
3779 the cache record is now keyed on a recipient/sender pair, not just the
3780 recipient address. There doesn't seem to be a real danger of callout loops,
3781 since a callout by the remote host to check the sender would use <>.
3782 [SEE ABOVE: changed after hitting problems.]
3784 72. Exim treats illegal SMTP error codes that do not begin with 4 or 5 as
3785 temporary errors. However, in the case of such a code being given after
3786 the end of a data transmission (i.e. after ".") Exim was failing to write
3787 a retry record for the message. (Yes, there was some broken host that was
3788 actually sending 8xx at this point.)
3790 73. An unknown lookup type in a host list could cause Exim to panic-die when
3791 the list was checked. (An example that provoked this was putting <; in the
3792 middle of a list instead of at the start.) If this happened during a DATA
3793 ACL check, a -D file could be left lying around. This kind of configuration
3794 error no longer causes Exim to die; instead it causes a defer errror. The
3795 incident is still logged to the main and panic logs.
3797 74. Buglet left over from Exim 3 conversion. The message "too many messages
3798 in one connection" was written to the rejectlog but not the mainlog, except
3799 when address rewriting (yes!) was being logged.
3801 75. Added write_rejectlog option.
3803 76. When a system filter was run not as root (that is, when system_filter_user
3804 was set), the values of the $n variables were not being returned to the
3805 main process; thus, they were not subsequently available in the $sn
3808 77. Added +return_path_on_delivery log selector.
3810 78. A connection timeout was being treated differently from recipients deferred
3811 when testing hosts_max_try with a message that was older than the host's
3812 retry timeout. (The host should not be counted, thus allowing all hosts to
3813 be tried at least once before bouncing.) This may have been the cause of an
3814 occasionally reported bug whereby a message would remain on the queue
3815 longer than the retry timeout, but would be bounced if a delivery was
3816 forced. I say "may" because I never totally pinned down the problem;
3817 setting up timeout/retry tests is difficult. See also the next item.
3819 79. The ultimate address timeout was not being applied to errors that involved
3820 a combination of host plus message (for example, a timeout on a MAIL
3821 command). When an address resolved to a number of possible hosts, and they
3822 were not all tried for each delivery (e.g. because of hosts_max_try), a
3823 message could remain on the queue longer than the retry timeout.
3825 80. Sieve bug: "stop" inside "elsif" was broken. Applied a patch from Michael
3828 81. Fixed an obscure SMTP outgoing bug which required at least the following
3829 conditions: (a) there was another message waiting for the same server;
3830 (b) the server returned 5xx to all RCPT commands in the first message so
3831 that the message was not completed; (c) the server dropped the connection
3832 or gave a negative response to the RSET that Exim sends to abort the
3833 transaction. The observed case was a dropped connection after DATA that had
3834 been sent in pipelining mode. That is, the server had advertised PIPELINING
3835 but was not implementing it correctly. The effect of the bug was incorrect
3836 behaviour, such as trying another host, and this could lead to a crash.
3842 1. The 3rd arguments to getsockname(), getpeername(), and accept() in exim.c
3843 and daemon.c were passed as pointers to ints; they should have been
3844 pointers to socklen_t variables (which are typically unsigned ints).
3846 2. Some signed/unsigned type warnings in the os.c file for Linux have been
3849 3. Fixed a really odd bug that affected only the testing scheme; patching a
3850 certain fixed string in the binary changed the value of another string that
3851 happened to be identical to the end of the original first string.
3853 4. When gethostbyname() (or equivalent) is passed an IP address as a "host
3854 name", it returns that address as the IP address. On some operating
3855 systems (e.g. Solaris), it also passes back the IP address string as the
3856 "host name". However, on others (e.g. Linux), it passes back an empty
3857 string. Exim wasn't checking for this, and was changing the host name to an
3858 empty string, assuming it had been canonicized.
3860 5. Although rare, it is permitted to have more than one PTR record for a given
3861 IP address. I thought that gethostbyaddr() or getipnodebyaddr() always gave
3862 all the names associated with an address, because they do in Solaris.
3863 However, it seems that they do not in Linux for data that comes from the
3864 DNS. If an address in /etc/hosts has multiple names, they _are_ all given.
3865 I found this out when I moved to a new Linux workstation and tried to run
3866 the Exim test suite.
3868 To get round this problem I have changed the code so that it now does its
3869 own call to the DNS to look up PTR records when searching for a host name.
3870 If nothing can be found in the DNS, it tries gethostbyaddr(), so that
3871 addresses that are only in /etc/hosts are still found.
3873 This behaviour is, however, controlled by an option called host_lookup_
3874 order, which defaults to "bydns:byaddr". If people want to use the other
3875 order, or indeed, just use one or the other means of lookup, they can
3876 specify it in this variable.
3878 6. If a PTR record yields an empty name, Exim treats it as non-existent. In
3879 some operating systems, this comes back from gethostbyaddr() as an empty
3880 string, and this is what Exim used to test for. However, it seems that in
3881 other systems, "." is yielded. Exim now tests for this case too.
3883 7. The values of check_spool_space and check_log_space are now held internally
3884 as a number of kilobytes instead of an absolute number of bytes. If a
3885 numbers is specified without 'K' or 'M', it is rounded up to the nearest
3886 kilobyte. This means that much larger values can be stored.
3888 8. Exim monitor: an attempt to get the action menu when not actually pointing
3889 at a message produces an empty menu entitled "No message selected". This
3890 works on Solaris (OpenWindows). However, XFree86 does not like a menu with
3891 no entries in it ("Shell widget menu has zero width and/or height"). So I
3892 have added a single, blank menu entry in this case.
3894 9. Added ${quote_local_part.
3896 10. MIME decoding is now applied to the contents of Subject: header lines when
3899 11. Now that a reference to $sender_host_address automatically causes a reverse
3900 lookup to occur if necessary (4.13/18), there is no need to arrange for a
3901 host lookup before query-style lookups in lists that might use this
3902 variable. This has therefore been abolished, and the "net-" prefix is no
3903 longer necessary for query-style lookups.
3905 12. The Makefile for SCO_SV contained a setting of LDFLAGS. This appears to
3906 have been a typo for LFLAGS, so it has been changed.
3908 13. The install script calls Exim with "-C /dev/null" in order to find the
3909 version number. If ALT_CONFIG_PREFIX was set, this caused an error message
3910 to be output. Howeve, since Exim outputs its version number before the
3911 error, it didn't break the script. It just looked ugly. I fixed this by
3912 always allowing "-C /dev/null" if the caller is root.
3914 14. Ignore overlarge ACL variable number when reading spool file - insurance
3915 against a later release with more variables having written the file.
3917 15. The standard form for an IPv6 address literal was being rejected by EHLO.
3918 Example: [IPv6:2002:c1ed:8229:10:202:2dff:fe07:a42a]. Exim now accepts
3919 this, as well as the form without the "IPv6" on the front.
3921 16. Added CHOWN_COMMAND=/usr/sbin/chown and LIBS=-lresolv to the
3922 OS/Makefile-Darwin file.
3924 17. Fixed typo in lookups/ldap.c: D_LOOKUP should be D_lookup. This applied
3925 only to LDAP libraries that do not have LDAP_OPT_DEREF.
3927 18. After change 4.21/52, "%ld" was used to format the contents of the $inode
3928 variable. However, some OS use ints for inodes. I've added cast to long int
3929 to get rid of the compiler warning.
3931 19. I had forgotten to lock out "/../" in configuration file names when
3932 ALT_CONFIG_PREFIX was set.
3934 20. Routers used for verification do not need to specify transports. However,
3935 if such a router generated a host list, and callout was configured, Exim
3936 crashed, because it could not find a port number from the (non-existent)
3937 transport. It now assumes port 25 in this circumstance.
3939 21. Added the -t option to exigrep.
3941 22. If LOOKUP_LSEARCH is defined, all three linear search methods (lsearch,
3942 wildlsearch, nwildlsearch) are compiled. LOOKUP_WILDLSEARCH and LOOKUP_
3943 NWILDLSEARCH are now obsolete, but retained for compatibility. If either of
3944 them is set, LOOKUP_LSEARCH is forced.
3946 23. "exim -bV" now outputs a list of lookups that are included in the binary.
3948 24. Added sender and host information to the "rejected by local_scan()" log
3949 line; previously there was no indication of these.
3951 25. Added .include_if_exists.
3953 26. Change 3.952/11 added an explicit directory sync on top of a file sync for
3954 Linux. It turns out that not all file systems support this. Apparently some
3955 versions of NFS do not. (It's rare to put Exim's spool on NFS, but people
3956 do it.) To cope with this, the error EINVAL, which means that sync-ing is
3957 not supported on the file descriptor, is now ignored when Exim is trying to
3958 sync a directory. This applies only to Linux.
3960 27. Added -DBIND_8_COMPAT to the CLFAGS setting for Darwin.
3962 28. In Darwin (MacOS X), the PAM headers are in /usr/include/pam and not in
3963 /usr/include/security. There's now a flag in OS/os.h-Darwin to cope with
3966 29. Added support for maildirsize files from supplied patch (modified a bit).
3968 30. The use of :fail: followed by an empty string could lead Exim to respond to
3969 sender verification failures with (e.g.):
3971 550 Verification failed for <xxx>
3972 550 Sender verify failed
3974 where the first response line was missing the '-' that indicates it is not
3975 the final line of the response.
3977 31. The loop for finding the name of the user that called Exim had a hardwired
3978 limit of 10; it now uses the value of finduser_retries, which is used for
3979 all other user lookups.
3981 32. Added $received_count variable, available in data and not_smtp ACLs, and at
3984 33. Exim was neglecting to zero errno before one call of strtol() when
3985 expanding a string and expecting an integer value. On some systems this
3986 resulted in spurious "integer overflow" errors. Also, it was casting the
3987 result into an int without checking.
3989 34. Testing for a connection timeout using "timeout_connect" in the retry rules
3990 did not work. The code looks as if it has *never* worked, though it appears
3991 to have been documented since at least releast 1.62. I have made it work.
3993 35. The "timeout_DNS" error in retry rules, also documented since at least
3994 1.62, also never worked. As it isn't clear exactly what this means, and
3995 clearly it isn't a major issue, I have abolished the feature by treating it
3996 as "timeout", and writing a warning to the main and panic logs.
3998 36. The display of retry rules for -brt wasn't always showing the error code
4001 37. Added new error conditions to retry rules: timeout_A, timeout_MX,
4002 timeout_connect_A, timeout_connect_MX.
4004 38. Rewriting the envelope sender at SMTP time did not allow it to be rewritten
4005 to the empty sender.
4007 39. The daemon was not analysing the content of -oX till after it had closed
4008 stderr and disconnected from the controlling terminal. This meant that any
4009 syntax errors were only noted on the panic log, and the return code from
4010 the command was 0. By re-arranging the code a little, I've made the
4011 decoding happen first, so such errors now appear on stderr, and the return
4012 code is 1. However, the actual setting up of the sockets still happens in
4013 the disconnected process, so errors there are still only recorded on the
4016 40. A daemon listener on a wildcard IPv6 socket that also accepts IPv4
4017 connections (as happens on some IP stacks) was logged at start up time as
4018 just listening for IPv6. It now logs "IPv6 with IPv4". This differentiates
4019 it from "IPv6 and IPv4", which means that two separate sockets are being
4022 41. The debug output for gethostbyname2() or getipnodebyname() failures now
4023 says whether AF_INET or AF_INET6 was passed as an argument.
4025 42. Exiwhat output was messed up when time zones were included in log
4028 43. Exiwhat now gives more information about the daemon's listening ports,
4029 and whether -tls-on-connect was used.
4031 44. The "port" option of the smtp transport is now expanded.
4033 45. A "message" modifier in a "warn" statement in a non-message ACL was being
4034 silently ignored. Now an error message is written to the main and panic
4037 46. There's a new ACL modifier called "logwrite" which writes to a log file
4038 as soon as it is encountered.
4040 47. Added $local_user_uid and $local_user_gid at routing time.
4042 48. Exim crashed when trying to verify a sender address that was being
4045 49. Exim was recognizing only a space character after ".include". It now also
4046 recognizes a tab character.
4048 50. Fixed several bugs in the Perl script that creates the exim.8 man page by
4049 extracting the relevant information from the specification. The man page no
4050 longer contains scrambled data for the -d option, and I've added a section
4051 at the front about calling Exim under different names.
4053 51. Added "extra_headers" argument to the "mail" command in filter files.
4055 52. Redirecting mail to an unqualified address in a Sieve filter caused Exim to
4058 53. Installed eximstats 1.29.
4060 54. Added transport_filter_timeout as a generic transport option.
4062 55. Exim no longer adds an empty Bcc: header to messages that have no To: or
4063 Cc: header lines. This was required by RFC 822, but it not required by RFC
4066 56. Exim used to add From:, Date:, and Message-Id: header lines to any
4067 incoming messages that did not have them. Now it does so only if the
4068 message originates locally, that is, if there is no associated remote host
4069 address. When Resent- header lines are present, this applies to the Resent-
4070 lines rather than the non-Resent- lines.
4072 57. Drop incoming SMTP connection after too many syntax or protocol errors. The
4073 limit is controlled by smtp_max_synprot_errors, defaulting to 3.
4075 58. Messages for configuration errors now include the name of the main
4076 configuration file - useful now that there may be more than one file in a
4077 list (.included file names were always shown).
4079 59. Change 4.21/82 (run initgroups() when starting the daemon) causes problems
4080 for those rare installations that do not start the daemon as root or run it
4081 setuid root. I've cut out the call to initgroups() if the daemon is not
4084 60. The Exim user and group can now be bound into the binary as text strings
4085 that are looked up at the start of Exim's processing.
4087 61. Applied a small patch for the Interbase code, supplied by Ard Biesheuvel.
4089 62. Added $mailstore_basename variable.
4091 63. Installed patch to sieve.c from Michael Haardt.
4093 64. When Exim failed to open the panic log after failing to open the main log,
4094 the original message it was trying to log was written to stderr and debug
4095 output, but if they were not available (the usual case in production), it
4096 was lost. Now it is written to syslog before the two lines that record the
4097 failures to open the logs.
4099 65. Users' Exim filters run in subprocesses under the user's uid. It is
4100 possible for a "deliver" command or an alias in a "personal" command to
4101 provoke an address rewrite. If logging of address rewriting is configured,
4102 this fails because the process is not running as root or exim. There may be
4103 a better way of dealing with this, but for the moment (because 4.30 needs
4104 to be released), I have disabled address rewrite logging when running a
4105 filter in a non-root, non-exim process.
4111 1. The buildconfig auxiliary program wasn't quoting the value set for
4112 HEADERS_CHARSET. This caused a compilation error complaining that 'ISO' was
4113 not defined. This bug was masked in 4.22 by the effect that was fixed in
4116 2. Some messages that were rejected after a message id was allocated were
4117 shown as "incomplete" by exigrep. It no longer does this for messages that
4118 are rejected by local_scan() or the DATA or non-SMTP ACLs.
4120 3. If a Message-ID: header used a domain literal in the ID, and Exim did not
4121 have allow_domain_literals set, the ID did not get logged in the <= line.
4122 Domain literals are now always recognized in Message-ID: header lines.
4124 4. The first argument for a ${extract expansion item is the key name or field
4125 number. Leading and trailing spaces in this item were not being ignored,
4126 causing some misleading effects.
4128 5. When deliver_drop_privilege was set, single queue runner processes started
4129 manually (i.e. by the command "exim -q") or by the daemon (which uses the
4130 same command in the process it spins off) were not dropping privilege.
4132 6. When the daemon running as "exim" started a queue runner, it always
4133 re-executed Exim in the spun-off process. This is a waste of effort when
4134 deliver_drop_privilege is set. The new process now just calls the
4135 queue-runner function directly.
4141 1. Typo in the src/EDITME file: it referred to HEADERS_DECODE_TO instead of
4144 2. Change 4.21/73 introduced a bug. The pid file path set by -oP was being
4145 ignored. Though the use of -oP was forcing the writing of a pid file, it
4146 was always written to the default place.
4148 3. If the message "no IP address found for host xxxx" is generated during
4149 incoming verification, it is now followed by identification of the incoming
4150 connection (so you can more easily find what provoked it).
4152 4. Bug fix for Sieve filters: "stop" inside a block was not working properly.
4154 5. Added some features to "harden" Exim a bit more against certain attacks:
4156 (a) There is now a build-time option called FIXED_NEVER_USERS that can
4157 be put in Local/Makefile. This is like the never_users runtime option,
4158 but it cannot be overridden. The default setting is "root".
4160 (b) If ALT_CONFIG_PREFIX is defined in Local/Makefile, it specifies a
4161 prefix string with which any file named in a -C command line option
4164 (c) If ALT_CONFIG_ROOT_ONLY is defined in Local/Makefile, root privilege
4165 is retained for -C and -D only if the caller of Exim is root. Without
4166 it, the exim user may also use -C and -D and retain privilege.
4168 (d) If DISABLE_D_OPTION is defined in Local/Makefile, the use of the -D
4169 command line option is disabled.
4171 6. Macro names set by the -D option must start with an upper case letter, just
4172 like macro names defined in the configuration file.
4174 7. Added "dereference=" facility to LDAP.
4176 8. Two instances of the typo "uknown" in the source files are fixed.
4178 9. If a PERL_COMMAND setting in Local/Makefile was not at the start of a line,
4179 the Configure-Makefile script screwed up while processing it.
4181 10. Incorporated PCRE 4.4.
4183 11. The SMTP synchronization check was not operating right at the start of an
4184 SMTP session. For example, it could not catch a HELO sent before the client
4185 waited for the greeting. There is now a check for outstanding input at the
4186 point when the greeting is written. Because of the duplex, asynchronous
4187 nature of TCP/IP, it cannot be perfect - the incorrect input may be on its
4188 way, but not yet received, when the check is performed.
4190 12. Added tcp_nodelay to make it possible to turn of the setting of TCP_NODELAY
4191 on TCP/IP sockets, because this apparently causes some broken clients to
4194 13. Installed revised OS/Makefile-CYGWIN and OS/os.c-cygwin (the .h file was
4195 unchanged) from the Cygwin maintainer.
4197 14. The code for -bV that shows what is in the binary showed "mbx" when maildir
4198 was supported instead of testing for mbx. Effectively a typo.
4200 15. The spa authenticator server code was not checking that the input it
4201 received was valid base64.
4203 16. The debug output line for the "set" modifier in ACLs was not showing the
4204 name of the variable that was being set.
4206 17. Code tidy: the variable type "vtype_string" was never used. Removed it.
4208 18. Previously, a reference to $sender_host_name did not cause a DNS reverse
4209 lookup on its own. Something else was needed to trigger the lookup. For
4210 example, a match in host_lookup or the need for a host name in a host list.
4211 Now, if $sender_host_name is referenced and the host name has not yet been
4212 looked up, a lookup is performed. If the lookup fails, the variable remains
4213 empty, and $host_lookup_failed is set to "1".
4215 19. Added "eqi" as a case-independent comparison operator.
4217 20. The saslauthd authentication condition could segfault if neither service
4218 nor realm was specified.
4220 21. If an overflowing value such as "2048M" was set for message_size_limit, the
4221 error message that was logged was misleading, and incoming SMTP
4222 connections were dropped. The message is now more accurate, and temporary
4223 errors are given to SMTP connections.
4225 22. In some error situations (such as 21 above) Exim rejects all SMTP commands
4226 (except RSET) with a 421 error, until QUIT is received. However, it was
4227 failing to send a response to QUIT.
4229 23. The HELO ACL was being run before the code for helo_try_verify_hosts,
4230 which made it impossible to use "verify = helo" in the HELO ACL. The HELO
4231 ACL is now run after the helo_try_verify_hosts code.
4233 24. "{MD5}" and "{SHA1}" are now recognized as equivalent to "{md5"} and
4234 "{sha1}" in the "crypteq" expansion condition (in fact the comparison is
4235 case-independent, so other case variants are also recognized). Apparently
4236 some systems use these upper case variants.
4238 25. If more than two messages were waiting for the same host, and a transport
4239 filter was specified for the transport, Exim sent two messages over the
4240 same TCP/IP connection, and then failed with "socket operation on non-
4241 socket" when it tried to send the third.
4243 26. Added Exim::debug_write and Exim::log_write for embedded Perl use.
4245 27. The extern definition of crypt16() in expand.c was not being excluded when
4246 the OS had its own crypt16() function.
4248 28. Added bounce_return_body as a new option, and bounce_return_size_limit
4249 as a preferred synonym for return_size_limit, both as an option and as an
4252 29. Added LIBS=-liconv to OS/Makefile-OSF1.
4254 30. Changed the default configuration ACL to relax the local part checking rule
4255 for addresses that are not in any local domains. For these addresses,
4256 slashes and pipe symbols are allowed within local parts, but the sequence
4257 /../ is explicitly forbidden.
4259 31. SPA server authentication was not clearing the challenge buffer before
4262 32. log_message in a "warn" ACL statement was writing to the reject log as
4263 well as to the main log, which contradicts the documentation and doesn't
4264 seem right (because no rejection is happening). So I have stopped it.
4266 33. Added Ard Biesheuvel's lookup code for accessing an Interbase database.
4267 However, I am unable to do any testing of this.
4269 34. Fixed an infelicity in the appendfile transport. When checking directories
4270 for a mailbox, to see if any needed to be created, it was accidentally
4271 using path names with one or more superfluous leading slashes; tracing
4272 would show up entries such as stat("///home/ph10", 0xFFBEEA48).
4274 35. If log_message is set on a "discard" verb in a MAIL or RCPT ACL, its
4275 contents are added to the log line that is written for every discarded
4276 recipient. (Previously a log_message setting was ignored.)
4278 36. The ${quote: operator now quotes the string if it is empty.
4280 37. The install script runs exim in order to find its version number. If for
4281 some reason other than non-existence or emptiness, which it checks, it
4282 could not run './exim', it was installing it with an empty version number,
4283 i.e. as "exim-". This error state is now caught, and the installation is
4286 38. An argument was missing from the function that creates an error message
4287 when Exim fails to connect to the socket for saslauthd authentication.
4288 This could cause Exim to crash, or give a corrupted message.
4290 39. Added isip, isip4, and isip6 to ${if conditions.
4292 40. The ACL variables $acl_xx are now saved with the message, and can be
4293 accessed later in routers, transports, and filters.
4295 41. The new lookup type nwildlsearch is like wildlsearch, except that the key
4296 strings in the file are not string-expanded.
4298 42. If a MAIL command specified a SIZE value that was too large to fit into an
4299 int variable, the check against message_size_limit failed. Such values are
4300 now forced to INT_MAX, which is around 2Gb for a 32-bit variable. Maybe one
4301 day this will have to be increased, but I don't think I want to be around
4302 when emails are that large.
4309 1. Removed HAVE_ICONV=yes from OS/Makefile-FreeBSD, since it seems that
4310 iconv() is not standard in FreeBSD.
4312 2. Change 4.21/17 was buggy and could cause stack overwriting on a system with
4313 IPv6 enabled. The observed symptom was a segmentation fault on return from
4314 the function os_common_find_running_interfaces() in src/os.c.
4316 3. In the check_special_case() function in daemon.c I had used "errno" as an
4317 argument name, which causes warnings on some systems. This was basically a
4318 typo, since it was named "eno" in the comments!
4320 4. The code that waits for the clock to tick (at a resolution of some fraction
4321 of a second) so as to ensure message-id uniqueness was always waiting for
4322 at least one whole tick, when it could have waited for less. [This is
4323 almost certainly not relevant at current processor speeds, where it is
4324 unlikely to ever wait at all. But we try to future-proof.]
4326 5. The function that sleeps for a time interval that includes fractions of a
4327 second contained a race. It did not block SIGALRM between setting the
4328 timer, and suspending (a couple of lines later). If the interval was short
4329 and the sigsuspend() was delayed until after it had expired, the suspension
4330 never ended. On busy systems this could lead to processes getting stuck for
4333 6. Some uncommon configurations may cause a lookup to happen in a queue runner
4334 process, before it forks any delivery processes. The open lookup caching
4335 mechanism meant that the open file or database connection was passed into
4336 the delivery process. The problem was that delivery processes always tidy
4337 up cached lookup data. This could cause a problem for the next delivery
4338 process started by the queue runner, because the external queue runner
4339 process does not know about the closure. So the next delivery process
4340 still has data in the lookup cache. In the case of a file lookup, there was
4341 no problem because closing a file descriptor in a subprocess doesn't affect
4342 the parent. However, if the lookup was caching a connection to a database,
4343 the connection was closed, and the second delivery process was likely to
4344 see errors such as "PGSQL: query failed: server closed the connection
4345 unexpectedly". The problem has been fixed by closing all cached lookups
4346 in a queue runner before running a delivery process.
4348 7. Compiler warning on Linux for the second argument of iconv(), which doesn't
4349 seem to have the "const" qualifier which it has on other OS. I've
4352 8. Change 4.21/2 was too strict. It is only if there are two authenticators
4353 *of the same type* (client or server) with the same public name that an
4354 error should be diagnosed.
4356 9. When Exim looked up a host name for an IP address, but failed to find the
4357 original IP address when looking up the host name (a safety check), it
4358 output the message "<ip address> does not match any IP for NULL", which was
4359 confusing, to say the least. The bug was that the host name should have
4360 appeared instead of "NULL".
4362 10. Since release 3.03, if Exim is called by a uid other than root or the Exim
4363 user that is built into the binary, and the -C or -D options is used, root
4364 privilege is dropped before the configuration file is read. In addition,
4365 logging is switched to stderr instead of the normal log files. If the
4366 configuration then re-defines the Exim user, the unprivileged environment
4367 is probably not what is expected, so Exim logs a panic warning message (but
4370 However, if deliver_drop_privilege is set, the unprivileged state may well
4371 be exactly what is intended, so the warning has been cut out in that case,
4372 and Exim is allowed to try to write to its normal log files.
4378 1. smtp_return_error_details was not giving details for temporary sender
4379 or receiver verification errors.
4381 2. Diagnose a configuration error if two authenticators have the same public
4384 3. Exim used not to create the message log file for a message until the first
4385 delivery attempt. This could be confusing when incoming messages were held
4386 for policy or load reasons. The message log file is now created at the time
4387 the message is received, and an initial "Received" line is written to it.
4389 4. The automatically generated man page for command line options had a minor
4390 bug that caused no ill effects; however, a more serious problem was that
4391 the procedure for building the man page automatically didn't always
4392 operate. Consequently, release 4.20 contains an out-of-date version. This
4393 shouldn't happen again.
4395 5. When building Exim with embedded Perl support, the script that builds the
4396 Makefile was calling 'perl' to find its compile-time parameters, ignoring
4397 any setting of PERL_COMMAND in Local/Makefile. This is now fixed.
4399 6. The freeze_tell option was not being used for messages that were frozen on
4400 arrival, either by an ACL or by local_scan().
4402 7. Added the smtp_incomplete_transaction log selector.
4404 8. After STARTTLS, Exim was not forgetting that it had advertised AUTH, so it
4405 was accepting AUTH without a new EHLO.
4407 9. Added tls_remember_esmtp to cope with YAEB. This allows AUTH and other
4408 ESMTP extensions after STARTTLS without a new EHLO, in contravention of the
4411 10. Logging of TCP/IP connections (when configured) now happens in the main
4412 daemon process instead of the child process, so that the TCP/IP connection
4413 count is more accurate (but it can never be perfect).
4415 11. The use of "drop" in a nested ACL was not being handled correctly in the
4416 outer ACL. Now, if condition failure induced by the nested "drop" causes
4417 the outer ACL verb to deny access ("accept" or "discard" after "endpass",
4418 or "require"), the connection is dropped.
4420 12. Similarly, "discard" in a nested ACL wasn't being handled. A nested ACL
4421 that yield "discard" can now be used with an "accept" or a "discard" verb,
4422 but an error is generated for any others (because I can't see a useful way
4423 to define what should happen).
4425 13. When an ACL is read dynamically from a file (or anywhere else), the lines
4426 are now processed in the same way as lines in the Exim configuration file.
4427 In particular, continuation lines are supported.
4429 14. Added the "dnslists = a.b.c!=n.n.n.n" feature.
4431 15. Added -ti meaning -t -i.
4433 16. Check for letters, digits, hyphens, and dots in the names of dnslist
4434 domains, and warn by logging if others are found.
4436 17. At least on BSD, alignment is not guarenteed for the array of ifreq's
4437 returned from GIFCONF when Exim is trying to find the list of interfaces on
4438 a host. The code in os.c has been modified to copy each ifreq to an aligned
4439 structure in all cases.
4441 Also, in some cases, the returned ifreq's were being copied to a 'struct
4442 ifreq' on the stack, which was subsequently passed to host_ntoa(). That
4443 means the last couple of bytes of an IPv6 address could be chopped if the
4444 ifreq contained only a normal sockaddr (14 bytes storage).
4446 18. Named domain lists were not supported in the hosts_treat_as_local option.
4447 An entry such as +xxxx was not recognized, and was treated as a literal
4450 19. Ensure that header lines added by a DATA ACL are included in the reject log
4451 if the ACL subsequently rejects the message.
4453 20. Upgrade the cramtest.pl utility script to use Digest::MD5 instead of just
4454 MD5 (which is deprecated).
4456 21. When testing a filter file using -bf, Exim was writing a message when it
4457 took the sender from a "From " line in the message, but it was not doing so
4458 when it took $return_path from a Return-Path: header line. It now does.
4460 22. If the contents of a "message" modifier for a "warn" ACL verb do not begin
4461 with a valid header line field name (a series of printing characters
4462 terminated by a colon, Exim now inserts X-ACL-Warn: at the beginning.
4464 23. Changed "disc" in the source to "disk" to conform to the documentation and
4465 the book and for uniformity.
4467 24. Ignore Sendmail's -Ooption=value command line item.
4469 25. When execve() failed while trying to run a command in a pipe transport,
4470 Exim was returning EX_UNAVAILBLE (69) from the subprocess. However, this
4471 could be confused with a return value of 69 from the command itself. This
4472 has been changed to 127, the value the shell returns if it is asked to run
4473 a non-existent command. The wording for the related log line suggests a
4474 non-existent command as the problem.
4476 26. If received_header_text expands to an empty string, do not add a Received:
4477 header line to the message. (Well, it adds a token one on the spool, but
4478 marks it "old" so that it doesn't get used or transmitted.)
4480 27. Installed eximstats 1.28 (addition of -nt option).
4482 28. There was no check for failure on the call to getsockname() in the daemon
4483 code. This can fail if there is a shortage of resources on the system, with
4484 ENOMEM, for example. A temporary error is now given on failure.
4486 29. Contrary to the C standard, it seems that in some environments, the
4487 equivalent of setlocale(LC_ALL, "C") is not obeyed at the start of a C
4488 program. Exim now does this explicitly; it affects the formatting of
4489 timestamps using strftime().
4491 30. If exiqsumm was given junk data, it threw up some uninitialized variable
4492 complaints. I've now initialized all the variables, to avoid this.
4494 32. Header lines added by a system filter were not being "seen" during
4495 transport-time rewrites.
4497 33. The info_callback() function passed to OpenSSL is set up with type void
4498 (*)(SSL *, int, int), as described somewhere. However, when calling the
4499 function (actually a macro) that sets it up, the type void(*)() is
4500 expected. I've put in a cast to prevent warnings from picky compilers.
4502 34. If a DNS black list lookup found a CNAME record, but there were no A
4503 records associated with the domain it pointed at, Exim crashed.
4505 35. If a DNS black list lookup returned more than one A record, Exim ignored
4506 all but the first. It now scans all returned addresses if a particular IP
4507 value is being sought. In this situation, the contents of the
4508 $dnslist_value variable are a list of all the addresses, separated by a
4511 36. Tightened up the rules for host name lookups using reverse DNS. Exim used
4512 to accept a host name and all its aliases if the forward lookup for any of
4513 them yielded the IP address of the incoming connection. Now it accepts only
4514 those names whose forward lookup yields the correct IP address. Any other
4515 names are discarded. This closes a loophole whereby a rogue DNS
4516 administrator could create reverse DNS records to break through a
4517 wildcarded host restriction in an ACL.
4519 37. If a user filter or a system filter that ran in a subprocess used any of
4520 the numerical variables ($1, $2 etc), or $thisaddress, in a pipe command,
4521 the wrong values were passed to the pipe command ($thisaddress had the
4522 value of $0, $0 had the value of $1, etc). This bug was introduced by
4523 change 4.11/101, and not discovered because I wrote an inadequate test. :-(
4525 38. Improved the line breaking for long SMTP error messages from ACLs.
4526 Previously, if there was no break point between 40 and 75 characters, Exim
4527 left the rest of the message alone. Two changes have been made: (a) I've
4528 reduced the minimum length to 35 characters; (b) if it can't find a break
4529 point between 35 and 75 characters, it looks ahead and uses the first one
4530 that it finds. This may give the occasional overlong line, but at least the
4531 remaining text gets split now.
4533 39. Change 82 of 4.11 was unimaginative. It assumed the limit on the number of
4534 file descriptors might be low, and that setting 1000 would always raise it.
4535 It turns out that in some environments, the limit is already over 1000 and
4536 that lowering it causes trouble. So now Exim takes care not to decrease it.
4538 40. When delivering a message, the value of $return_path is set to $sender_
4539 address at the start of routing (routers may change the value). By an
4540 oversight, this default was not being set up when an address was tested by
4541 -bt or -bv, which affected the outcome if any router or filter referred to
4544 41. The idea of the "warn" ACL verb is that it adds a header or writes to the
4545 log only when "message" or "log_message" are set. However, if one of the
4546 conditions was an address verification, or a call to a nested ACL, the
4547 messages generated by the underlying test were being passed through. This
4548 no longer happens. The underlying message is available in $acl_verify_
4549 message for both "message" and "log_message" expansions, so it can be
4550 passed through if needed.
4552 42. Added RFC 2047 interpretation of header lines for $h_ expansions, with a
4553 new expansion $bh_ to give the encoded byte string without charset
4554 translation. Translation happens only if iconv() is available; HAVE_ICONV
4555 indicates this at build time. HEADERS_CHARSET gives the charset to
4556 translate to; headers_charset can change it in the configuration, and
4557 "headers charset" can change it in an individual filter file.
4559 43. Now that we have a default RFC 2047 charset (see above), the code in Exim
4560 that creates RFC 2047 encoded "words" labels them as that charset instead
4561 of always using iso-8859-1. The cases are (i) the explicit ${rfc2047:
4562 expansion operator; (ii) when Exim creates a From: line for a local
4563 message; (iii) when a header line is rewritten to include a "phrase" part.
4565 44. Nasty bug in exiqsumm: the regex to skip already-delivered addresses was
4566 buggy, causing it to skip the first lines of messages whose message ID
4567 ended in 'D'. This would not have bitten before Exim release 4.14, because
4568 message IDs were unlikely to end in 'D' before then. The effect was to have
4569 incorrect size information for certain domains.
4571 45. #include "config.h" was missing at the start of the crypt16.c module. This
4572 caused trouble on Tru64 (aka OSF1) systems, because HAVE_CRYPT16 was not
4575 46. If there was a timeout during a "random" callout check, Exim treated it as
4576 a failure of the random address, and carried on sending RSET and the real
4577 address. If the delay was just some slowness somewhere, the response to the
4578 original RCPT would be taken as a response to RSET and so on, causing
4579 mayhem of various kinds.
4581 47. Change 50 for 4.20 was a heap of junk. I don't know what I was thinking
4582 when I implemented it. It didn't allow for the fact that some option values
4583 may legitimatetly be negative (e.g. size_addition), and it didn't even do
4584 the right test for positive values.
4586 48. Domain names in DNS records are case-independent. Exim always looks them up
4587 in lower case. Some resolvers return domain names in exactly the case they
4588 appear in the zone file, that is, they may contain uppercase letters. Not
4589 all resolvers do this - some return always lower case. Exim was treating a
4590 change of case by a resolver as a change of domain, similar to a widening
4591 of a domain abbreviation. This triggered its re-routing code and so it was
4592 trying to route what was effectively the same domain again. This normally
4593 caused routing to fail (because the router wouldn't handle the domain
4594 twice). Now Exim checks for this case specially, and just changes the
4595 casing of the domain that it ultimately uses when it transmits the message
4598 49. Added Sieve (RFC 3028) support, courtesy of Michael Haardt's contributed
4601 50. If a filter generated a file delivery with a non-absolute name (possible if
4602 no home directory exists for the router), the forbid_file option was not
4605 51. Added '&' feature to dnslists, to provide bit mask matching in addition to
4606 the existing equality matching.
4608 52. Exim was using ints instead of ino_t variables in some places where it was
4609 dealing with inode numbers.
4611 53. If TMPDIR is defined in Local/Makefile (default in src/EDITME is
4612 TMPDIR="/tmp"), Exim checks for the presence of an environment variable
4613 called TMPDIR, and if it finds it is different, it changes its value.
4615 54. The smtp_printf() function is now made available to local_scan() so
4616 additional output lines can be written before returning. There is also an
4617 smtp_fflush() function to enable the detection of a dropped connection.
4618 The variables smtp_input and smtp_batched_input are exported to
4621 55. Changed the default runtime configuration: the message "Unknown user"
4622 has been removed from the ACL, and instead placed on the localuser router,
4623 using the cannot_route_message feature. This means that any verification
4624 failures that generate their own messages won't get overridden. Similarly,
4625 the "Unrouteable address" message that was in the ACL for unverifiable
4626 relay addresses has also been removed.
4628 56. Added hosts_avoid_esmtp to the smtp transport.
4630 57. The exicyclog script was not checking for the esoteric option
4631 CONFIGURE_FILE_USE_EUID in the Local/Makefile. It now does this, but it
4632 will work only if exicyclog is run under the appropriate euid.
4634 58. Following a discussion on the list, the rules by which Exim recognises line
4635 endings on incoming messages have been changed. The -dropcr and drop_cr
4636 options are now no-ops, retained only for backwards compatibility. The
4637 following line terminators are recognized: LF CRLF CR. However, special
4638 processing applies to CR:
4640 (i) The sequence CR . CR does *not* terminate an incoming SMTP message,
4641 nor a local message in the state where . is a terminator.
4643 (ii) If a bare CR is encountered in a header line, an extra space is added
4644 after the line terminator so as not to end the header. The reasoning
4645 behind this is that bare CRs in header lines are most likely either
4646 to be mistakes, or people trying to play silly games.
4648 59. The size of a message, as listed by "-bp" or in the Exim monitor window,
4649 was being incorrectly given as 18 bytes larger than it should have been.
4650 This is a VOB (very old bug).
4652 60. This may never have affected anything current, but just in case it has:
4653 When the local host is found other than at the start of a list of hosts,
4654 the local host, those with the same MX, and any that follow, are discarded.
4655 When the list in question was part of a longer list of hosts, the following
4656 hosts (not currently being processed) were also being discarded. This no
4657 longer happens. I'm not sure if this situation could ever has previously
4660 61. Added the "/MX" feature to lists of hosts in the manualroute and query
4663 62. Whenever Exim generates a new message, it now adds an Auto-Submitted:
4664 header. This is something that is recommended in a new Internet Draft, and
4665 is something that is documented as being done by Sendmail. There are two
4666 possible values. For messages generated by the autoreply transport, Exim
4669 Auto-Submitted: auto-replied
4671 whereas for all other generated messages (e.g. bounces) it adds
4673 Auto-Submitted: auto-generated
4675 63. The "personal" condition in filters now includes a test for the
4676 Auto-Submitted: header. If it contains the string "auto-" the message it
4677 not considered personal.
4679 64. Added rcpt_include_affixes as a generic transport option.
4681 65. Added queue_only_override (default true).
4683 66. Added the syslog_duplication option.
4685 67. If what should have been the first header line of a message consisted of
4686 a space followed by a colon, Exim was mis-interpreting it as a header line.
4687 It isn't of course - it is syntactically invalid and should therefore be
4688 treated as the start of the message body. The misbehaviour could have
4689 caused a number of strange effects, including loss of data in subsequent
4690 header lines, and spool format errors.
4692 68. Formerly, the AUTH parameter on a MAIL command was trusted only if the
4693 client host had authenticated. This control can now be exercised by an ACL
4694 for more flexibility.
4696 69. By default, callouts do not happen when testing with -bh. There is now a
4697 variant, -bhc, which does actually run the callout code, including
4698 consulting and updating the callout cache.
4700 70. Added support for saslauthd authentication, courtesy of Alexander
4703 71. If statvfs() failed on the spool or log directories while checking their
4704 size for availability, Exim confusingly gave the error "space shortage".
4705 Furthermore, in debugging mode it crashed with a floating point exception.
4706 These checks are done if check_{spool,log}_{space,inodes} are set, and when
4707 an SMTP message arrives with SIZE= on the MAIL command. As this is a really
4708 serious problem, Exim now writes to the main and panic logs when this
4709 happens, with details of the failure. It then refuses to accept the
4710 incoming message, giving the message "spool directory problem" or "log
4711 directory problem" with a 421 code for SMTP messages.
4713 72. When Exim is about to re-exec itself, it ensures that the file descriptors
4714 0, 1, and 2 exist, because some OS complain for execs without them (see
4715 ChangeLog 4.05/30). If necessary, Exim opens /dev/null to use for these
4716 descriptors. However, the code omitted to check that the open succeeded,
4717 causing mysterious errors if for some reason the permissions on /dev/null
4718 got screwed. Now Exim writes a message to the main and panic logs, and
4719 bombs out if it can't open /dev/null.
4721 73. Re-vamped the way daemon_smtp_port, local_interfaces, and -oX work and
4722 interact so that it is all more flexible. It is supposed to remain
4723 backwards compatible. Also added extra_local_interfaces.
4725 74. Invalid data sent to a SPA (NTLM) server authenticator could cause the code
4726 to bomb out with an assertion failure - to the client this appears as a
4727 connection drop. This problem occurs in the part of the code that was taken
4728 from the Samba project. Fortunately, the assertion is in a very simple
4729 function, so I have fixed this by reproducing the function inline in the
4730 one place where it is called, and arranging for authentication to fail
4731 instead of killing the process with assert().
4733 75. The SPA client code was not working when the server requested OEM rather
4734 than Unicode encoding.
4736 76. Added code to make require_files with a specific uid setting more usable in
4737 the case where statting the file as root fails - usually a non-root-mounted
4738 NFS file system. When this happens and the failure is EACCES, Exim now
4739 forks a subprocess and does the per-uid checking as the relevant uid.
4741 77. Added process_log_path.
4743 78. If log_file_path was not explicitly set, a setting of check_log_space or
4744 check_log_inodes was ignored.
4746 79. If a space check for the spool or log partitions fails, the incident is now
4747 logged. Of course, in the latter case the data may get lost...
4749 80. Added the %p formatting code to string_format() so that it can be used to
4750 print addresses in debug_print(). Adjusted all the address printing in the
4751 debugging in store.c to use %p rather than %d.
4753 81. There was a concern that a line of code in smtp_in.c could overflow a
4754 buffer if a HELO/EHLO command was given followed by 500 or so spaces. As
4755 initially expressed, the concern was not well-founded, because trailing
4756 spaces are removed early. However, if the trailing spaces were followed by
4757 a NULL, they did not get removed, so the overflow was possible. Two fixes
4760 (a) I re-wrote the offending code in a cleaner fashion.
4761 (b) If an incoming SMTP command contains a NULL character, it is rejected
4764 82. When Exim changes uid/gid to the Exim user at daemon start time, it now
4765 runs initgroups(), so that if the Exim user is in any additional groups,
4766 they will be used during message reception.
4772 The change log for 4.20 and earlier releases has been archived.
git://git.exim.org / users / jgh / exim.git / blob