1 $Cambridge: exim/doc/doc-txt/ChangeLog,v 1.467 2007/01/31 16:52:12 ph10 Exp $
3 Change log file for Exim from version 4.21
4 -------------------------------------------
9 MH/01 Fix for bug #448, segfault in Dovecot authenticator when interface_address
10 is unset (happens when testing with -bh and -oMi isn't used). Thanks to
13 PH/01 Added a new log selector smtp_no_mail, to log SMTP sessions that do not
16 PH/02 In an ACL statement such as
18 deny dnslists = X!=127.0.0.2 : X=127.0.0.2
20 if a client was not listed at all, or was listed with a value other than
21 127.0.0.2, in the X list, but was listed with 127.0.0.2 in the Y list,
22 the condition was not true (as it should be), so access was not denied.
23 The bug was that the ! inversion was incorrectly passed on to the second
24 item. This has been fixed.
26 PH/03 Added additional dnslists conditions == and =& which are different from
27 = and & when the dns lookup returns more than one IP address.
29 PH/04 Added gnutls_require_{kx,mac,protocols} to give more control over the
30 cipher suites used by GnuTLS. These options are ignored by OpenSSL.
32 PH/05 After discussion on the list, added a compile time option ENABLE_DISABLE_
33 FSYNC, which compiles an option called disable_fsync that allows for
34 bypassing fsync(). The documentation is heavily laced with warnings.
36 SC/01 Updated eximstats to collate all SpamAssassin rejects into one bucket.
38 PH/06 Some tidies to the infrastructure of the Test Suite that is concerned
39 with the auxiliary C programs that it uses: (1) Arrange for BIND_8_COMPAT
40 to be defined when compiling on OSX (Darwin); (2) Tidies to the Makefile,
41 including adding "make clean"; (3) Added -fPIC when compiling the test
42 dynamically loaded module, to get rid of a warning.
44 MH/02 Fix for bug #451, causing paniclog entries to be written if a bounce
45 message fails, move_frozen_messages = true and ignore_bounce_errors_after
46 = 0s. The bug is otherwise harmless.
48 PH/07 There was a bug in the dovecot authenticator such that the value of
49 $auth1 could be overwritten, and so not correctly preserved, after a
50 successful authentication. This usually meant that the value preserved by
51 the server_setid option was incorrect.
53 PH/08 Added $smtp_count_at_connection_start, deliberately with a long name.
55 PH/09 Installed PCRE release 7.0.
57 PH/10 The acl_not_smtp_start ACL was, contrary to the documentation, not being
58 run for batched SMTP input. It is now run at the start of every message
59 in the batch. While fixing this I discovered that the process information
60 (output by running exiwhat) was not always getting set for -bs and -bS
61 input. This is fixed, and it now also says "batched" for BSMTP.
63 PH/11 Added control=no_pipelining.
65 PH/12 Added $sending_ip_address and $sending_port (mostly Magnus Holmgren's
66 patch, slightly modified), and move the expansion of helo_data till after
67 the connection is made in the smtp transport (so it can use these
70 PH/13 Added ${rfc2047d: to decoded RFC 2047 strings.
72 PH/14 Added log_selector = +pid.
78 PH/01 Two more bugs that were introduced by 4.64/PH/07, in addition to the one
79 fixed by 4.65/MH/01 (is this a record?) are fixed:
81 (i) An empty string was always treated as zero by the numeric comparison
82 operators. This behaviour has been restored.
84 (ii) It is documented that the numeric comparison operators always treat
85 their arguments as decimal numbers. This was broken in that numbers
86 starting with 0 were being interpreted as octal.
88 While fixing these problems I realized that there was another issue that
89 hadn't been noticed. Values of message_size_limit (both the global option
90 and the transport option) were treated as octal if they started with 0.
91 The documentation was vague. These values are now always treated as
92 decimal, and I will make that clear in the documentation.
98 TK/01 Disable default definition of HAVE_LINUX_SENDFILE. Clashes with
99 Linux large file support (_FILE_OFFSET_BITS=64) on older glibc
102 MH/01 Don't check that the operands of numeric comparison operators are
103 integers when their expansion is in "skipping" mode (fixes bug
104 introduced by 4.64-PH/07).
106 PH/01 If a system filter or a router generates more than SHRT_MAX (32767)
107 child addresses, Exim now panics and dies. Previously, because the count
108 is held in a short int, deliveries were likely to be lost. As such a
109 large number of recipients for a single message is ridiculous
110 (performance will be very, very poor), I have chosen to impose a limit
111 rather than extend the field.
117 TK/01 Bugzilla #401. Fix DK spooling code so that it can overwrite a
118 leftover -K file (the existence of which was triggered by #402).
119 While we were at it, introduced process PID as part of the -K
120 filename. This should rule out race conditions when creating
123 TK/02 Bugzilla #402. Apply patch from Simon Arlott, speeding up DK signing
124 processing considerably. Previous code took too long for large mails,
125 triggering a timeout which in turn triggers #401.
127 TK/03 Introduced HAVE_LINUX_SENDFILE to os.h-Linux. Currently only used
128 in the DK code in transports.c. sendfile() is not really portable,
129 hence the _LINUX specificness.
131 TF/01 In the add_headers option to the mail command in an Exim filter,
132 there was a bug that Exim would claim a syntax error in any
133 header after the first one which had an odd number of characters
136 PH/01 If a server that rejects MAIL FROM:<> was the target of a sender
137 callout verification, Exim cached a "reject" for the entire domain. This
138 is correct for most verifications, but it is not correct for a recipient
139 verification with use_sender or use_postmaster set, because in that case
140 the callout does not use MAIL FROM:<>. Exim now distinguishes the special
141 case of MAIL FROM:<> rejection from other early rejections (e.g.
142 rejection of HELO). When verifying a recipient using a non-null MAIL
143 address, the cache is ignored if it shows MAIL FROM:<> rejection.
144 Whatever the result of the callout, the value of the domain cache is
145 left unchanged (for any other kind of callout, getting as far as trying
146 RCPT means that the domain itself is ok).
148 PH/02 Tidied a number of unused variable and signed/unsigned warnings that
151 PH/03 On Solaris, an unexpectedly close socket (dropped connection) can
152 manifest itself as EPIPE rather than ECONNECT. When tidying away a
153 session, the daemon ignores ECONNECT errors and logs others; it now
154 ignores EPIPE as well.
156 PH/04 Applied Nico Erfurth's refactoring patch to tidy up mime.c
157 (quoted-printable decoding).
159 PH/05 Applied Nico Erfurth's refactoring patch to tidy up spool_mbox.c, and
160 later the small subsequent patch to fix an introduced bug.
162 PH/06 Installed the latest Cygwin Makefile from the Cygwin maintainer.
164 PH/07 There was no check for overflow in expansions such as ${if >{1}{4096M}}.
166 PH/08 An error is now given if message_size_limit is specified negative.
168 PH/09 Applied and tidied up Jakob Hirsch's patch for allowing ACL variables
169 to be given (somewhat) arbitrary names.
171 JJ/01 exipick 20060919.0, allow for arbitrary acl_ variables introduced
174 JJ/02 exipick 20060919.0, --show-vars args can now be regular expressions,
175 miscellaneous code fixes
177 PH/10 Added the log_reject_target ACL modifier to specify where to log
180 PH/11 Callouts were setting the name used for EHLO/HELO from $smtp_active_
181 hostname. This is wrong, because it relates to the incoming message (and
182 probably the interface on which it is arriving) and not to the outgoing
183 callout (which could be using a different interface). This has been
184 changed to use the value of the helo_data option from the smtp transport
185 instead - this is what is used when a message is actually being sent. If
186 there is no remote transport (possible with a router that sets up host
187 addresses), $smtp_active_hostname is used.
189 PH/12 Installed Andrey Panin's patch to add a dovecot authenticator. Various
190 tweaks were necessary in order to get it to work (see also 21 below):
191 (a) The code assumed that strncpy() returns a negative number on buffer
192 overflow, which isn't the case. Replaced with Exim's string_format()
194 (b) There were several signed/unsigned issues. I just did the minimum
195 hacking in of casts. There is scope for a larger refactoring.
196 (c) The code used strcasecmp() which is not a standard C function.
197 Replaced with Exim's strcmpic() function.
198 (d) The code set only $1; it now sets $auth1 as well.
199 (e) A simple test gave the error "authentication client didn't specify
200 service in request". It would seem that Dovecot has changed its
201 interface. Fortunately there's a specification; I followed it and
202 changed what the client sends and it appears to be working now.
204 PH/13 Added $message_headers_raw to provide the headers without RFC 2047
207 PH/14 Corrected misleading output from -bv when -v was also used. Suppose the
208 address A is aliased to B and C, where B exists and C does not. Without
209 -v the output is "A verified" because verification stops after a
210 successful redirection if more than one address is generated. However,
211 with -v the child addresses are also verified. Exim was outputting "A
212 failed to verify" and then showing the successful verification for C,
213 with its parentage. It now outputs "B failed to verify", showing B's
214 parentage before showing the successful verification of C.
216 PH/15 Applied Michael Deutschmann's patch to allow DNS black list processing to
217 look up a TXT record in a specific list after matching in a combined
220 PH/16 It seems that the options setting for the resolver (RES_DEFNAMES and
221 RES_DNSRCH) can affect the behaviour of gethostbyname() and friends when
222 they consult the DNS. I had assumed they would set it the way they
223 wanted; and indeed my experiments on Linux seem to show that in some
224 cases they do (I could influence IPv6 lookups but not IPv4 lookups).
225 To be on the safe side, however, I have now made the interface to
226 host_find_byname() similar to host_find_bydns(), with an argument
227 containing the DNS resolver options. The host_find_byname() function now
228 sets these options at its start, just as host_find_bydns() does. The smtp
229 transport options dns_qualify_single and dns_search_parents are passed to
230 host_find_byname() when gethostbyname=TRUE in this transport. Other uses
231 of host_find_byname() use the default settings of RES_DEFNAMES
232 (qualify_single) but not RES_DNSRCH (search_parents).
234 PH/17 Applied (a modified version of) Nico Erfurth's patch to make
235 spool_read_header() do less string testing, by means of a preliminary
236 switch on the second character of optional "-foo" lines. (This is
237 overdue, caused by the large number of possibilities that now exist.
238 Originally there were few.) While I was there, I also converted the
239 str(n)cmp tests so they don't re-test the leading "-" and the first
240 character, in the hope this might squeeze out yet more improvement.
242 PH/18 Two problems with "group" syntax in header lines when verifying: (1) The
243 flag allowing group syntax was set by the header_syntax check but not
244 turned off, possible causing trouble later; (2) The flag was not being
245 set at all for the header_verify test, causing "group"-style headers to
246 be rejected. I have now set it in this case, and also caused header_
247 verify to ignore an empty address taken from a group. While doing this, I
248 came across some other cases where the code for allowing group syntax
249 while scanning a header line wasn't quite right (mostly, not resetting
250 the flag correctly in the right place). These bugs could have caused
251 trouble for malformed header lines. I hope it is now all correct.
253 PH/19 The functions {pwcheck,saslauthd}_verify_password() are always called
254 with the "reply" argument non-NULL. The code, however (which originally
255 came from elsewhere) had *some* tests for NULL when it wrote to *reply,
256 but it didn't always do it. This confused somebody who was copying the
257 code for some other use. I have removed all the tests.
259 PH/20 It was discovered that the GnuTLS code had support for RSA_EXPORT, a
260 feature that was used to support insecure browsers during the U.S. crypto
261 embargo. It requires special client support, and Exim is probably the
262 only MTA that supported it -- and would never use it because real RSA is
263 always available. This code has been removed, because it had the bad
264 effect of slowing Exim down by computing (never used) parameters for the
265 RSA_EXPORT functionality.
267 PH/21 On the advice of Timo Sirainen, added a check to the dovecot
268 authenticator to fail if there's a tab character in the incoming data
269 (there should never be unless someone is messing about, as it's supposed
270 to be base64-encoded). Also added, on Timo's advice, the "secured" option
271 if the connection is using TLS or if the remote IP is the same as the
272 local IP, and the "valid-client-cert option" if a client certificate has
275 PH/22 As suggested by Dennis Davis, added a server_condition option to *all*
276 authenticators. This can be used for authorization after authentication
277 succeeds. (In the case of plaintext, it servers for both authentication
280 PH/23 Testing for tls_required and lost_connection in a retry rule didn't work
281 if any retry times were supplied.
283 PH/24 Exim crashed if verify=helo was activated during an incoming -bs
284 connection, where there is no client IP address to check. In this
285 situation, the verify now always succeeds.
287 PH/25 Applied John Jetmore's -Mset patch.
289 PH/26 Added -bem to be like -Mset, but loading a message from a file.
291 PH/27 In a string expansion for a processed (not raw) header when multiple
292 headers of the same name were present, leading whitespace was being
293 removed from all of them, but trailing whitespace was being removed only
294 from the last one. Now trailing whitespace is removed from each header
295 before concatenation. Completely empty headers in a concatenation (as
298 PH/28 Fixed bug in backwards-compatibility feature of PH/09 (thanks to John
299 Jetmore). It would have mis-read ACL variables from pre-4.61 spool files.
301 PH/29 [Removed. This was a change that I later backed out, and forgot to
302 correct the ChangeLog entry (that I had efficiently created) before
303 committing the later change.]
305 PH/30 Exim was sometimes attempting to deliver messages that had suffered
306 address errors (4xx response to RCPT) over the same connection as other
307 messages routed to the same hosts. Such deliveries are always "forced",
308 so retry times are not inspected. This resulted in far too many retries
309 for the affected addresses. The effect occurred only when there were more
310 hosts than the hosts_max_try setting in the smtp transport when it had
311 the 4xx errors. Those hosts that it had tried were not added to the list
312 of hosts for which the message was waiting, so if all were tried, there
313 was no problem. Two fixes have been applied:
315 (i) If there are any address or message errors in an SMTP delivery, none
316 of the hosts (tried or untried) are now added to the list of hosts
317 for which the message is waiting, so the message should not be a
318 candidate for sending over the same connection that was used for a
319 successful delivery of some other message. This seems entirely
320 reasonable: after all the message is NOT "waiting for some host".
321 This is so "obvious" that I'm not sure why it wasn't done
322 previously. Hope I haven't missed anything, but it can't do any
323 harm, as the worst effect is to miss an optimization.
325 (ii) If, despite (i), such a delivery is accidentally attempted, the
326 routing retry time is respected, so at least it doesn't keep
327 hammering the server.
329 PH/31 Installed Andrew Findlay's patch to close the writing end of the socket
330 in ${readsocket because some servers need this prod.
332 PH/32 Added some extra debug output when updating a wait-xxx database.
334 PH/33 The hint "could be header name not terminated by colon", which has been
335 given for certain expansion errors for a long time, was not being given
336 for the ${if def:h_colon_omitted{... case.
338 PH/34 The spec says: "With one important exception, whenever a domain list is
339 being scanned, $domain contains the subject domain." There was at least
340 one case where this was not true.
342 PH/35 The error "getsockname() failed: connection reset by peer" was being
343 written to the panic log as well as the main log, but it isn't really
344 panic-worthy as it just means the connection died rather early on. I have
345 removed the panic log writing for the ECONNRESET error when getsockname()
348 PH/36 After a 4xx response to a RCPT error, that address was delayed (in queue
349 runs only) independently of the message's sender address. This meant
350 that, if the 4xx error was in fact related to the sender, a different
351 message to the same recipient with a different sender could confuse
352 things. In particualar, this can happen when sending to a greylisting
353 server, but other circumstances could also provoke similar problems.
354 I have changed the default so that the retry time for these errors is now
355 based a combination of the sender and recipient addresses. This change
356 can be overridden by setting address_retry_include_sender=false in the
359 PH/37 For LMTP over TCP/IP (the smtp transport), error responses from the
360 remote server are returned as part of bounce messages. This was not
361 happening for LMTP over a pipe (the lmtp transport), but now it is the
362 same for both kinds of LMTP.
364 PH/38 Despite being documented as not happening, Exim was rewriting addresses
365 in header lines that were in fact CNAMEs. This is no longer the case.
367 PH/39 If -R or -S was given with -q<time>, the effect of -R or -S was ignored,
368 and queue runs started by the daemon processed all messages. This has
369 been fixed so that -R and -S can now usefully be given with -q<time>.
371 PH/40 Import PCRE release 6.7 (fixes some bugs).
373 PH/41 Add bitwise logical operations to eval (courtesy Brad Jorsch).
375 PH/42 Give an error if -q is specified more than once.
377 PH/43 Renamed the variables $interface_address and $interface_port as
378 $received_ip_address and $received_port, to make it clear that these
379 values apply to message reception, and not to the outgoing interface when
380 a message is delivered. (The old names remain recognized, of course.)
382 PH/44 There was no timeout on the connect() call when using a Unix domain
383 socket in the ${readsocket expansion. There now is.
385 PH/45 Applied a modified version of Brad Jorsch's patch to allow "message" to
386 be meaningful with "accept".
388 SC/01 Eximstats V1.43
389 Bug fix for V1.42 with -h0 specified. Spotted by Chris Lear.
391 SC/02 Eximstats V1.44
392 Use a glob alias rather than an array ref in the generated
393 parser. This improves both readability and performance.
395 SC/03 Eximstats V1.45 (Marco Gaiarin / Steve Campbell)
396 Collect SpamAssassin and rejection statistics.
397 Don't display local sender or destination tables unless
398 there is data to show.
399 Added average volumes into the top table text output.
401 SC/04 Eximstats V1.46
402 Collect data on the number of addresses (recipients)
403 as well as the number of messages.
405 SC/05 Eximstats V1.47
406 Added 'Message too big' to the list of mail rejection
407 reasons (thanks to Marco Gaiarin).
409 SC/06 Eximstats V1.48
410 Mainlog lines which have GMT offsets and are too short to
411 have a flag are now skipped.
413 SC/07 Eximstats V1.49 (Alain Williams)
414 Added the -emptyok flag.
416 SC/08 Eximstats V1.50
417 Fixes for obtaining the IP address from reject messages.
419 JJ/03 exipick.20061117.2, made header handling as similar to exim as possible
420 (added [br]h_ prefixes, implemented RFC2047 decoding. Fixed
421 whitesspace changes from 4.64-PH/27
423 JJ/04 exipick.20061117.2, fixed format and added $message_headers_raw to
426 JJ/05 exipick.20061117.2, bug fixes (error out sooner when invalid criteria
427 are found, allow negative numbers in numeric criteria)
429 JJ/06 exipick.20061117.2, added new $message_body_missing variable
431 JJ/07 exipick.20061117.2, added $received_ip_address and $received_port
432 to match changes made in 4.64-PH/43
434 PH/46 Applied Jori Hamalainen's patch to add features to exiqsumm.
436 PH/47 Put in an explicit test for a DNS lookup of an address record where the
437 "domain" is actually an IP address, and force a failure. This locks out
438 those revolvers/nameservers that support "A-for-A" lookups, in
439 contravention of the specifications.
441 PH/48 When a host name was looked up from an IP address, and the subsequent
442 forward lookup of the name timed out, the host name was left in
443 $sender_host_name, contrary to the specification.
445 PH/49 Although default lookup types such as lsearch* or cdb*@ have always been
446 restricted to single-key lookups, Exim was not diagnosing an error if
447 * or *@ was used with a query-style lookup.
449 PH/50 Increased the value of DH_BITS in tls-gnu.c from 768 to 1024.
451 MH/01 local_scan ABI version incremented to 1.1. It should have been updated
452 long ago, but noone interested enough thought of it. Let's just say that
453 the "1.1" means that there are some new functions that weren't there at
454 some point in the past.
456 PH/51 Error processing for expansion failure of helo_data from an smtp
457 transport during callout processing was broken.
459 PH/52 Applied John Jetmore's patch to allow tls-on-connect and STARTTLS to be
460 tested/used via the -bh/-bhc/-bs options.
462 PH/53 Added missing "#include <time.h>" to pcre/pcretest.c (this was a PCRE
463 bug, fixed in subsequent PCRE releases).
465 PH/54 Applied Robert Bannocks' patch to avoid a problem with references that
466 arises when using the Solaris LDAP libraries (but not with OpenLDAP).
468 PH/55 Check for a ridiculously long file name in exim_dbmbuild.
474 SC/01 Use a glob alias rather than an array ref in eximstats generated
475 parser. This improves both readability and performance.
477 SC/02 Collect SpamAssassin and rejection statistics in eximstats.
478 Don't display local sender or destination tables in eximstats unless
479 there is data to show.
480 Added average volumes into the eximstats top table text output.
482 SC/03 Collect data on the number of addresses (recipients) as well
483 as the number of messages in eximstats.
485 TF/01 Correct an error in the documentation for the redirect router. Exim
486 does (usually) call initgroups() when daemonizing.
488 TF/02 Call initgroups() when dropping privilege in exim.c, so that Exim runs
489 with consistent privilege compared to when running as a daemon.
491 TF/03 Note in the spec that $authenticated_id is not set for local
492 submissions from trusted users.
494 TF/04 The ratelimit per_rcpt option now works correctly in acl_not_smtp.
495 Thanks to Dean Brooks <dean@iglou.com> for the patch.
497 TF/05 Make it easier to get SMTP authentication and TLS/SSL support working
498 by adding some example configuration directives to the default
499 configuration file. A little bit of work is required to uncomment the
500 directives and define how usernames and passwords are checked, but
501 there is now a framework to start from.
503 PH/01 Added #define LDAP_DEPRECATED 1 to ldap.c because some of the "old"
504 functions that Exim currently uses aren't defined in ldap.h for OpenLDAP
505 without this. I don't know how relevant this is to other LDAP libraries.
507 PH/02 Add the verb name to the "unknown ACL verb" error.
509 PH/03 Magnus Holmgren's patch for filter_prepend_home.
511 PH/03 Fixed Bugzilla #101: macro definition between ACLs doesn't work.
513 PH/04 Applied Magnus Holmgren's patch to fix Bugzilla #98: transport's home
514 directory not expanded when it should be if an expanded home directory
515 was set for the address (which is overridden by the transport).
517 PH/05 Applied Alex Kiernan's patch to fix Bugzilla #99: a problem with
520 PH/06 Added acl_not_smtp_start, based on Johannes Berg's patch, and set the
521 bit to forbid control=suppress_local_fixups in the acl_not_smtp ACL,
522 because it is too late at that time, and has no effect.
524 PH/07 Changed ${quote_pgsql to quote ' as '' instead of \' because of a
525 security issue with \' (bugzilla #107). I could not use the
526 PQescapeStringConn() function, because it needs a PGconn value as one of
529 PH/08 When testing addresses using -bt, indicate those final addresses that
530 are duplicates that would not cause an additional delivery. At least one
531 person was confused, thinking that -bt output corresponded to deliveries.
532 (Suppressing duplicates isn't a good idea as you lose the information
533 about possibly different redirections that led to the duplicates.)
535 PH/09 Applied patch from Erik to use select() instead of poll() in spam.c on
536 systems where poll() doesn't work, in particular OS X.
538 PH/10 Added more information to debugging output for retry time not reached.
540 PH/11 Applied patch from Arkadiusz Miskiewicz to apply a timeout to read
541 operations in malware.c.
543 PH/12 Applied patch from Magnus Holmgren to include the "h" tag in Domain Keys
546 PH/13 If write_rejectlog was set false when logging was sent to syslog with
547 syslog_duplication set false, log lines that would normally be written
548 both the the main log and to the reject log were not written to syslog at
551 PH/14 In the default configuration, change the use of "message" in ACL warn
552 statements to "add_header".
554 PH/15 Diagnose a filter syntax error for "seen", "unseen", or "noerror" if not
555 not followed by a command (e.g. "seen endif").
557 PH/16 Recognize SMTP codes at the start of "message" in ACLs and after :fail:
558 and :defer: in a redirect router. Add forbid_smtp_code to suppress the
561 PH/17 Added extra conditions to the default value of delay_warning_condition
565 { !eq{$h_list-id:$h_list-post:$h_list-subscribe:}{} } \
566 { match{$h_precedence:}{(?i)bulk|list|junk} } \
567 { match{$h_auto-submitted:}{(?i)auto-generated|auto-replied} } \
570 The Auto-Submitted: and various List- headers are standardised, whereas I
571 don't think Precedence: ever was.
573 PH/18 Refactored debugging code in route_finduser() to show more information,
574 in particular, the error code if getpwnam() issues one.
576 PH/19 Added PQsetClientEncoding(conn, "SQL_ASCII") to the pgsql code module.
577 This is apparently needed in addition to the PH/07 change above to avoid
578 any possible encoding problems.
580 PH/20 Perl can change the locale. Exim was resetting it after a ${perl call,
581 but not after initializing Perl.
583 PH/21 Added a call to PQsetNoticeProcessor() to catch pgsql "notices" and
584 output them only if debugging. By default they are written stderr,
585 apparently, which is not desirable.
587 PH/22 Added Alain Williams' LDAP patch to support setting REFERRALS=off on
590 JJ/01 exipick: added --reverse (and -R synonym), --random, --size, --sort and
593 JJ/02 exipick: rewrote --help documentation to hopefully make more clear.
595 PH/23 Made -oMaa and -oMt work with -bh and -bs to pretend the connection is
596 authenticated or an ident call has been made. Suppress the default
597 values for $authenticated_id and $authenticated_sender (but permit -oMai
598 and -oMas) when testing with -bh.
600 PH/24 Re-jigged the order of the tests in the default configuration so that the
601 tests for valid domains and recipients precede the DNS black list and CSA
602 tests, on the grounds that those ones are more expensive.
604 PH/25 Exim was not testing for a space following SMTP commands such as EHLO
605 that require one. Thus, EHLORHUBARB was interpreted as a valid command.
606 This bug exists in every version of Exim that I still have, right back to
609 PH/26 (n)wildlsearch lookups are documented as being done case-insensitively.
610 However, an attempt to turn on case-sensitivity in a regex key by
611 including (?-i) didn't work because the subject string was already
612 lowercased, and the effects were non-intuitive. It turns out that a
613 one-line patch can be used to allow (?-i) to work as expected.
619 TF/01 Fix the add_header change below (4.61 PH/55) which had a bug that (amongst
620 other effects) broke the use of negated acl sub-conditions.
622 PH/01 ${readsocket now supports Internet domain sockets (modified John Jetmore
625 PH/02 When tcp-wrappers is called from Exim, it returns only "deny" or "allow".
626 "Deny" causes Exim to reject the incoming connection with a 554 error.
627 Unfortunately, if there is a major crisis, such as a disk failure,
628 tcp-wrappers gives "deny", whereas what one would like would be some
629 kind of temporary error. A kludge has been added to help with this.
630 Before calling hosts_ctl(), errno is set zero. If the result is "deny", a
631 554 error is used if errno is still zero or contains ENOENT (which occurs
632 if either of the /etc/hosts.{allow,deny} files is missing). Otherwise, a
635 PH/03 Add -lutil to the default FreeBSD LIBS setting.
637 PH/04 Change PH/19 for 4.61 was too wide. It should not be applied to host
638 errors. Otherwise a message that provokes a temporary error (when other
639 messages do not) can cause a whole host to time out.
641 PH/05 Batch deliveries by appendfile and pipe transports did not work when the
642 addresses were routed directly to files or pipes from a redirect router.
643 File deliveries just didn't batch; pipe deliveries might have suffered
646 PH/06 A failure to get a lock for a hints database would erroneously always say
647 "Failed to get write lock", even when it was really a read lock.
649 PH/07 The appendfile transport was creating MBX lock files with a fixed mode
650 of 0600. This has been changed to use the value of the lockfile_mode
651 option (which defaults to 0600).
653 PH/08 Applied small patch from the Sieve maintainer.
655 PH/09 If maildir_quota_directory_regex was set to exclude (say) the .Trash
656 folder from quota calculations, a direct delivery into this folder messed
657 up the contents of the maildirsize file. This was because the regex was
658 used only to exclude .Trash (or whatever) when the size of the mailbox
659 was calculated. There was no check that a delivery was happening into an
660 excluded directory. This bug has been fixed by ignoring all quota
661 processing for deliveries into excluded directories.
663 PH/10 Added the maildirfolder_create_regex option to appendfile.
669 PH/01 The code for finding all the local interface addresses on a FreeBSD
670 system running IPv6 was broken. This may well have applied to all BSD
671 systems, as well as to others that have similar system calls. The broken
672 code found IPv4 interfaces correctly, but gave incorrect values for the
673 IPv6 interfaces. In particular, ::1 was not found. The effect in Exim was
674 that it would not match correctly against @[] and not recognize the IPv6
677 PH/02 The ipliteral router was not recognizing addresses of the form user@
678 [ipv6:....] because it didn't know about the "ipv6:" prefix.
680 PH/03 Added disable_ipv6.
682 PH/04 Changed $reply_address to use the raw form of the headers instead of the
683 decoded form, because it is most often used to construct To: headers
684 lines in autoreplies, and the decoded form may well be syntactically
685 invalid. However, $reply_address has leading white space removed, and all
686 newlines turned into spaces so that the autoreply transport does not
689 PH/05 If group was specified without a user on a router, and no group or user
690 was specified on a transport, the group from the router was ignored.
692 PH/06 Increased the number of ACL variables to 20 of each type, and arranged
693 for visible compile-time settings that can be used to change these
694 numbers, for those that want even more. Backwards compatibility with old
695 spool files has been maintained. However, going back to a previous Exim
696 release will lost any variables that are in spool files.
698 PH/07 Two small changes when running in the test harness: increase delay when
699 passing a TCP/IP connection to a new process, in case the original
700 process has to generate a bounce, and remove special handling of
701 127.0.0.2 (sic), which is no longer necessary.
703 PH/08 Changed debug output of dbfn_open() flags from numbers to names, so as to
704 be the same on different OS.
706 PH/09 Moved a debug statement in filter processing to avoid a race problem when
709 JJ/01 exipick: fixed bug where -b (brief) output option showed "Vars:"
710 whether --show-vars was specified or not
712 JJ/02 exipick: Added support for new ACL variable spool format introduced
715 PH/10 Fixed another bug related to PH/04 above: if an incoming message had a
716 syntactically invalid From: or Reply-to: line, and a filter used this to
717 generate an autoreply, and therefore failed to obtain an address for the
718 autoreply, Exim could try to deliver to a non-existent relative file
719 name, causing unrelated and misleading errors. What now happens is that
720 it logs this as a hard delivery error, but does not attempt to create a
723 PH/11 The exinext utility has a -C option for testing purposes, but although
724 the given file was scanned by exinext itself; it wasn't being passed on
725 when Exim was called.
727 PH/12 In the smtp transport, treat an explicit ECONNRESET error the same as
728 an end-of-file indication when reading a command response.
730 PH/13 Domain literals for IPv6 were not recognized unless IPv6 support was
731 compiled. In many other places in Exim, IPv6 addresses are always
732 recognized, so I have changed this. It also means that IPv4 domain
733 literals of the form [IPV4:n.n.n.n] are now always recognized.
735 PH/14 When a uid/gid is specified for the queryprogram router, it cannot be
736 used if the router is not running as root, for example, when verifying at
737 ACL time, or when using -bh. The debugging output from this situation was
738 non-existent - all you got was a failure to exec. I have made two
741 (a) Failures to set uid/gid, the current directory, or a process leader
742 in a subprocess such as that created by queryprogram now generate
743 suitable debugging ouput when -d is set.
745 (b) The queryprogram router detects when it is not running as root,
746 outputs suitable debugging information if -d is set, and then runs
747 the subprocess without attempting to change uid/gid.
749 PH/15 Minor change to Makefile for building test_host (undocumented testing
752 PH/16 As discussed on the list in Nov/Dec: Exim no longer looks at the
753 additional section of a DNS packet that returns MX or SRV records.
754 Instead, it always explicitly searches for A/AAAA records. This avoids
755 major problems that occur when a DNS server includes only records of one
756 type (A or AAAA) in an MX/SRV packet. A byproduct of this change has
757 fixed another bug: if SRV records were looked up and the corresponding
758 address records were *not* found in the additional section, the port
759 values from the SRV records were lost.
761 PH/17 If a delivery to a pipe, file, or autoreply was deferred, Exim was not
762 using the correct key (the original address) when searching the retry
763 rules in order to find which one to use for generating the retry hint.
765 PH/18 If quota_warn_message contains a From: header, Exim now refrains from
766 adding the default one. Similarly, if it contains a Reply-To: header, the
767 errors_reply_to option, if set, is not used.
769 PH/19 When calculating a retry time, Exim used to measure the "time since
770 failure" by looking at the "first failed" field in the retry record. Now
771 it does not use this if it is later than than the arrival time of the
772 message. Instead it uses the arrival time. This makes for better
773 behaviour in cases where some deliveries succeed, thus re-setting the
774 "first failed" field. An example is a quota failure for a huge message
775 when small messages continue to be delivered. Without this change, the
776 "time since failure" will always be short, possible causing more frequent
777 delivery attempts for the huge message than are intended.
778 [Note: This change was subsequently modified - see PH/04 for 4.62.]
780 PH/20 Added $auth1, $auth2, $auth3 to contain authentication data (as well as
781 $1, $2, $3) because the numerical variables can be reset during some
782 expansion items (e.g. "match"), thereby losing the authentication data.
784 PH/21 Make -bV show the size of off_t variables so that the test suite can
785 decide whether to run tests for quotas > 2G.
787 PH/22 Test the values given for quota, quota_filecount, quota_warn_threshold,
788 mailbox_size, and mailbox_filecount in the appendfile transport. If a
789 filecount value is greater than 2G or if a quota value is greater than 2G
790 on a system where the size of off_t is not greater than 4, a panic error
793 PH/23 When a malformed item such as 1.2.3/24 appears in a host list, it can
794 never match. The debug and -bh output now contains an explicit error
795 message indicating a malformed IPv4 address or mask.
797 PH/24 An host item such as 1.2.3.4/abc was being treated as the IP address
798 1.2.3.4 without a mask. Now it is not recognized as an IP address, and
801 PH/25 Do not write to syslog when running in the test harness. The only
802 occasion when this arises is a failure to open the main or panic logs
803 (for which there is an explicit test).
805 PH/26 Added the /no_tell option to "control=freeze".
807 PH/27 If a host name lookup failed very early in a connection, for example, if
808 the IP address matched host_lookup and the reverse lookup yielded a name
809 that did not have a forward lookup, an error message of the form "no IP
810 address found for host xxx.xxx.xxx (during SMTP connection from NULL)"
811 could be logged. Now it outputs the IP address instead of "NULL".
813 PH/28 An enabling patch from MH: add new function child_open_exim2() which
814 allows the sender and the authenticated sender to be set when
815 submitting a message from within Exim. Since child_open_exim() is
816 documented for local_scan(), the new function should be too.
818 PH/29 In GnuTLS, a forced expansion failure for tls_privatekey was not being
819 ignored. In both GnuTLS and OpenSSL, an expansion of tls_privatekey that
820 results in an empty string is now treated as unset.
822 PH/30 Fix eximon buffer overflow bug (Bugzilla #73).
824 PH/31 Added sender_verify_fail logging option.
826 PH/32 In November 2003, the code in Exim that added an empty Bcc: header when
827 needed by RFC 822 but not by RFC 2822 was commented out. I have now
828 tidied the source and removed it altogether.
830 PH/33 When a queue run was abandoned because the load average was too high, a
831 log line was always written; now it is written only if the queue_run log
832 selector is set. In addition, the log line for abandonment now contains
833 information about the queue run such as the pid. This is always present
834 in "start" and "stop" lines but was omitted from the "abandon" line.
836 PH/34 Omit spaces between a header name and the colon in the error message that
837 is given when verify = headers_syntax fails (if there are lots of them,
838 the message gets confusing).
840 PH/35 Change the default for dns_check_names_pattern to allow slashes within
841 names, as there are now some PTR records that contain slashes. This check
842 is only to protect against broken name servers that fall over on strange
843 characters, so the fact that it applies to all lookups doesn't matter.
845 PH/36 Now that the new test suite is complete, we can remove some of the
846 special code in Exim that was needed for the old test suite. For example,
847 sorting DNS records because real resolvers return them in an arbitrary
848 order. The new test suite's fake resolver always returns records in the
851 PH/37 When running in the test harness, use -odi for submitted messages (e.g.
852 bounces) except when queue_only is set, to avoid logging races between
853 the different processes.
855 PH/38 Panic-die if .include specifies a non-absolute path.
857 PH/39 A tweak to the "H" retry rule from its user.
859 JJ/03 exipick: Removed parentheses from 'next' and 'last' calls that specified
860 a label. They prevented compilation on older perls.
862 JJ/04 exipick: Refactored code to prevent implicit split to @_ which caused
863 a warning to be raised on newish perls.
865 JJ/05 exipick: Fixed bug where -bpc always showed a count of all messages
866 on queue. Changes to match documented behaviour of showing count of
867 messages matching specified criteria.
869 PH/40 Changed the default ident timeout from 30s to 5s.
871 PH/41 Added support for the use of login_cap features, on those BSD systems
872 that have them, for controlling the resources used by pipe deliveries.
874 PH/42 The content-scanning code uses fopen() to create files in which to put
875 message data. Previously it was not paying any attention to the mode of
876 the files. Exim runs with umask(0) because the rest of the code creates
877 files with open(), and sets the required mode explicitly. Thus, these
878 files were ending up world-writeable. This was not a big issue, because,
879 being within the spool directory, they were not world-accessible. I have
880 created a function called modefopen, which takes an additional mode
881 argument. It sets umask(777), creates the file, chmods it to the required
882 mode, then resets the umask. All the relevant calls to fopen() in the
883 content scanning code have been changed to use this function.
885 PH/43 If retry_interval_max is set greater than 24 hours, it is quietly reset
886 to 24 hours. This avoids potential overflow problems when processing G
887 and H retry rules. I suspect nobody ever tinkers with this value.
889 PH/44 Added STRIP_COMMAND=/usr/bin/strip to the FreeBSD Makefile.
891 PH/45 When the plaintext authenticator is running as a client, the server's
892 challenges are checked to ensure they are valid base64 strings. By
893 default, the authentication attempt is cancelled if an invalid string is
894 received. Setting client_ignore_invalid_base64 true ignores these errors.
895 The decoded challenge strings are now placed in $auth1, $auth2, etc. as
896 they are received. Thus, the responses can be made to depend on the
897 challenges. If an invalid string is ignored, an empty string is placed in
900 PH/46 Messages that are created by the autoreply transport now contains a
901 References: header, in accordance with RFCs 2822 and 3834.
903 PH/47 Added authenticated_sender_force to the smtp transport.
905 PH/48 The ${prvs expansion was broken on systems where time_t was long long.
907 PH/49 Installed latest patch from the Sieve maintainer.
909 PH/50 When an Exim quota was set without a file count quota, and mailbox_size
910 was also set, the appendfile transport was unnecessarily scanning a
911 directory of message files (e.g. for maildir delivery) to find the count
912 of files (along with the size), even though it did not need this
913 information. It now does the scan only if it needs to find either the
914 size of the count of files.
916 PH/51 Added ${time_eval: to convert Exim time strings into seconds.
918 PH/52 Two bugs concerned with error handling when the smtp transport is
921 (i) Exim was not creating retry information for temporary errors given
922 for individual recipients after the DATA command when the smtp transport
923 was used in LMTP mode. This meant that they could be retried too
924 frequently, and not timed out correctly.
926 (ii) Exim was setting the flag that allows error details to be returned
927 for LMTP errors on RCPT commands, but not for LMTP errors for individual
928 recipients that were returned after the DATA command.
930 PH/53 This is related to PH/52, but is more general: for any failing address,
931 when detailed error information was permitted to be returned to the
932 sender, but the error was temporary, then after the final timeout, only
933 "retry timeout exceeded" was returned. Now it returns the full error as
934 well as "retry timeout exceeded".
936 PH/54 Added control=allow_auth_unadvertised, as it seems there are clients that
937 do this, and (what is worse) MTAs that accept it.
939 PH/55 Added the add_header modified to ACLs. The use of "message" with "warn"
940 will now be deprecated.
942 PH/56 New os.c-cygwin from the Cygwin maintainer.
944 JJ/06 exipick: added --unsorted option to allow unsorted output in all output
945 formats (previously only available in exim formats via -bpr, -bpru,
946 and -bpra. Now also available in native and exiqgrep formats)
948 JJ/07 exipick: added --freeze and --thaw options to allow faster interaction
949 with very large, slow to parse queues
951 JJ/08 exipick: added ! as generic prefix to negate any criteria format
953 JJ/09 exipick: miscellaneous performance enhancements (~24% improvements)
955 PH/57 Tidies in SMTP dialogue display in debug output: (i) It was not showing
956 responses to authentication challenges, though it was showing the
957 challenges; (ii) I've removed the CR characters from the debug output for
960 PH/58 Allow for the insertion of a newline as well as a space when a string
961 is turned into more than one encoded-word during RFC 2047 encoding. The
962 Sieve code now uses this.
964 PH/59 Added the following errors that can be detected in retry rules: mail_4xx,
965 data_4xx, lost_connection, tls_required.
967 PH/60 When a VRFY deferred or FAILED, the log message rather than the user
968 message was being sent as an SMTP response.
970 PH/61 Add -l and -k options to exicyclog.
972 PH/62 When verifying, if an address was redirected to one new address, so that
973 verification continued, and the new address failed or deferred after
974 having set something in $address_data, the value of $address_data was not
975 passed back to the ACL. This was different to the case when no
976 redirection occurred. The value is now passed back in both cases.
978 PH/63 Changed the macro HAVE_LOGIN_CAP (see PH/41 for this release above) to
979 HAVE_SETCLASSRESOURCES because there are different APIs in use that all
980 use login_cap.h, so on its own it isn't the distinguishing feature. The
981 new name refers directly to the setclassresources() function.
983 PH/65 Added configuration files for NetBSD3.
985 PH/66 Updated OS/Makefile-HP-UX for gcc 4.1.0 with HP-UX 11.
987 PH/67 Fixed minor infelicity in the sorting of addresses to ensure that IPv6
988 is preferred over IPv4.
990 PH/68 The bounce_return_message and bounce_return_body options were not being
991 honoured for bounces generated during the reception of non-SMTP messages.
992 In particular, this applied to messages rejected by the ACL. This bug has
993 been fixed. However, if bounce_return_message is true and bounce_return_
994 body is false, the headers that are returned for a non-SMTP message
995 include only those that have been read before the error was detected.
996 (In the case of an ACL rejection, they have all been read.)
998 PH/69 The HTML version of the specification is now built in a directory called
999 spec_html instead of spec.html, because the latter looks like a path with
1000 a MIME-type, and this confuses some software.
1002 PH/70 Catch two compiler warnings in sieve.c.
1004 PH/71 Fixed an obscure and subtle bug (thanks Alexander & Matthias). The
1005 function verify_get_ident() calls ip_connect() to connect a socket, but
1006 if the "connect()" function timed out, ip_connect() used to close the
1007 socket. However, verify_get_ident() also closes the socket later, and in
1008 between Exim writes to the log, which may get opened at this point. When
1009 the socket was closed in ip_connect(), the log could get the same file
1010 descriptor number as the socket. This naturally causes chaos. The fix is
1011 not to close the socket in ip_connect(); the socket should be closed by
1012 the function that creates it. There was only one place in the code where
1013 this was missing, in the iplookup router, which I don't think anybody now
1014 uses, but I've fixed it anyway.
1016 PH/72 Make dns_again_means_nonexist apply to lookups using gethostbyname() as
1017 well as to direct DNS lookups. Otherwise the handling of names in host
1018 lists is inconsistent and therefore confusing.
1024 PH/01 Two changes to the default runtime configuration:
1026 (1) Move the checks for relay_from_hosts and authenticated clients from
1027 after to before the (commented out) DNS black list checks.
1029 (2) Add control=submission to the relay_from_hosts and authenticated
1030 clients checks, on the grounds that messages accepted by these
1031 statements are most likely to be submissions.
1033 PH/02 Several tidies to the handling of ${prvs and ${prvscheck:
1035 (1) Generate an error if the third argument for the ${prvs expansion is
1038 (2) Treat a missing third argument of ${prvscheck as if it were an empty
1041 (3) Reset the variables that are obtained from the first argument of
1042 ${prvscheck and used in the second argument before leaving the code,
1043 because their memory is reclaimed, so using them afterwards may do
1046 (4) Tidy up the code for expanding the arguments of ${prvscheck one by
1047 one (it's much easier than Tom thought :-).
1049 (5) Because of (4), we can now allow for the use of $prvscheck_result
1050 inside the third argument.
1052 PH/03 For some reason, the default setting of PATH when running a command from
1053 a pipe transport was just "/usr/bin". I have changed it to
1056 PH/04 SUPPORT_TRANSLATE_IP_ADDRESS and MOVE_FROZEN_MESSAGES did not cause
1057 anything to be listed in the output from -bV.
1059 PH/05 When a filter generated an autoreply, the entire To: header line was
1060 quoted in the delivery log line, like this:
1062 => >A.N.Other <ano@some.domain> <original@ddress> ...
1064 This has been changed so that it extracts the operative address. There
1065 may be more than one such address. If so, they are comma-separated, like
1068 => >ano@some.domain,ona@other.domain <original@ddress> ...
1070 PH/06 When a client host used a correct literal IP address in a HELO or EHLO
1071 command, (for example, EHLO [1.2.3.4]) and the client's IP address was
1072 not being looked up in the rDNS to get a host name, Exim was showing the
1073 IP address twice in Received: lines, even though the IP addresses were
1074 identical. For example:
1076 Received: from [1.2.3.4] (helo=[1.2.3.4])
1078 However, if the real host name was known, it was omitting the HELO data
1079 if it matched the actual IP address. This has been tidied up so that it
1080 doesn't show the same IP address twice.
1082 PH/07 When both +timestamp and +memory debugging was on, the value given by
1083 $tod_xxx expansions could be wrong, because the tod_stamp() function was
1084 called by the debug printing, thereby overwriting the timestamp buffer.
1085 Debugging no longer uses the tod_stamp() function when +timestamp is set.
1087 PH/08 When the original message was included in an autoreply transport, it
1088 always said "this is a copy of the message, including all the headers",
1089 even if body_only or headers_only was set. It now gives an appropriate
1092 PH/09 Applied a patch from the Sieve maintainer which:
1094 o fixes some comments
1095 o adds the (disabled) notify extension core
1096 o adds some debug output for the result of if/elsif tests
1097 o points to the current vacation draft in the documentation
1098 and documents the missing references header update
1102 o fixes a bug in processing the envelope test (when testing
1103 multiple envelope elements, the last element determinted the
1106 PH/10 Exim was violating RFC 3834 ("Recommendations for Automatic Responses to
1107 Electronic Mail") by including:
1109 Auto-submitted: auto-generated
1111 in the messages that it generates (bounce messages and others, such as
1112 warnings). In the case of bounce messages for non-SMTP mesages, there was
1113 also a typo: it was using "Auto_submitted" (underscore instead of
1114 hyphen). Since every message generated by Exim is necessarily in response
1115 to another message, thes have all been changed to:
1117 Auto-Submitted: auto-replied
1119 in accordance with these statements in the RFC:
1121 The auto-replied keyword:
1123 - SHOULD be used on messages sent in direct response to another
1124 message by an automatic process,
1126 - MUST NOT be used on manually-generated messages,
1128 - MAY be used on Delivery Status Notifications (DSNs) and Message
1129 Disposition Notifications (MDNs),
1131 - MUST NOT be used on messages generated by automatic or periodic
1132 processes, except for messages which are automatic responses to
1135 PH/11 Added "${if def:sender_address {(envelope-from <$sender_address>)\n\t}}"
1136 to the default Received: header definition.
1138 PH/12 Added log selector acl_warn_skipped (default on).
1140 PH/13 After a successful wildlsearch lookup, discard the values of numeric
1141 variables because (a) they are in the wrong storage pool and (b) even if
1142 they were copied, it wouldn't work properly because of the caching.
1144 PH/14 Add check_rfc2047_length to disable enforcement of RFC 2047 length
1145 checking when decoding. Apparently there are clients that generate
1146 overlong encoded strings. Why am I not surprised?
1148 PH/15 If the first argument of "${if match_address" was not empty, but did not
1149 contain an "@" character, Exim crashed. Now it writes a panic log message
1150 and treats the condition as false.
1152 PH/16 In autoreply, treat an empty string for "once" the same as unset.
1154 PH/17 A further patch from the Sieve maintainer: "Introduce the new Sieve
1155 extension "envelope-auth". The code is finished and in agreement with
1156 other implementations, but there is no documentation so far and in fact,
1157 nobody wrote the draft yet. This extension is currently #undef'ed, thus
1158 not changing the active code.
1160 Print executed "if" and "elsif" statements when debugging is used. This
1161 helps a great deal to understand what a filter does.
1163 Document more things not specified clearly in RFC3028. I had all this
1164 sorted out, when out of a sudden new issues came to my mind. Oops."
1166 PH/18 Exim was not recognizing the "net-" search type prefix in match_ip lists
1169 PH/19 Exim expands the IPv6 address given to -bh to its full non-abbreviated
1170 canonical form (as documented). However, after a host name lookup from
1171 the IP address, check_host() was doing a simple string comparison with
1172 addresses acquired from the DNS when checking that the found name did
1173 have the original IP as one of its addresses. Since any found IPv6
1174 addresses are likely to be in abbreviated form, the comparison could
1175 fail. Luckily, there already exists a function for doing the comparison
1176 by converting both addresses to binary, so now that is used instead of
1177 the text comparison.
1179 PH/20 There was another similar case to PH/19, when a complete host name was
1180 given in a host list; looking up its IP address could give an abbreviated
1181 form, whereas the current host's name might or might not be abbreviated.
1182 The same fix has been applied.
1188 PH/01 The ${base62: operator adjusted itself to base 36 when BASE_62 was
1189 set to 36 (for Darwin and Cygwin), but the ${base62d: operator did not.
1192 PH/02 Two minor problems detected in Cygwin: the os.{c,h} files had lost */ on
1193 the CVS lines, and there was a missing #if HAVE_IPV6 in host.c.
1195 PH/03 Typo: missing ".o" in src/pcre/Makefile.
1197 PH/04 Tighten up "personal" tests: Instead of testing for any "List-"
1198 header line, restrict the check to what is listed in RFCs 2369 and 2929.
1199 Also, for "Auto-Submitted", treat anything other than "no" as
1200 non-personal, in accordance with RFC 3834. (Previously it treated
1201 anything starting "auto-" as non-personal.)
1203 TF/01 The control=submission/name=... option had a problem with syntax
1204 errors if the name included a slash character. The /name= option
1205 now slurps the rest of the string, so it can include any characters
1206 but it must come last in the list of options (after /sender_retain
1209 PH/05 Some modifications to the interface to the fake nameserver for the new
1217 TK/01 Added the "success_on_redirect" address verification option. See
1218 NewStuff for rationale and an example.
1220 PH/01 Added support for SQLite, basic code supplied by David Woodhouse.
1222 PH/02 Patch to exigrep to allow it to work on syslog lines.
1224 PH/03 When creating an mbox file for a virus/spam scan, use fseek() instead of
1225 fread() to skip over the body file's header line, because in Cygwin the
1226 header line is locked and is inaccessible.
1228 PH/04 Added $message_exim_id, ultimately to replace $message_id (they will both
1229 co-exist for some time) to make it clear that it is the Exim ID that is
1230 referenced, not the Message-ID: header line.
1232 PH/05 Replaced all Tom's calls to snprintf() with calls to the internal
1233 string_format() function, because snprintf() does not exist on all
1236 PH/06 The use of forbid_filter_existstest now also locks out the use of the
1237 ${stat: expansion item.
1239 PH/07 Changed "SMTP protocol violation: synchronization error" into "SMTP
1240 protocol synchronization error", to keep the pedants happy.
1242 PH/08 Arrange for USE_INET_NTOA_FIX to be set in config.h for AIX systems as
1243 well as for IRIX systems, when gcc is being used. See the host.c source
1246 PH/09 Installed latest Cygwin configuration files from the Cygwin maintainer.
1248 PH/10 Named domain lists were not working if used in a queue_smtp_domains
1251 PH/11 Added support for the IGNOREQUOTA extension to LMTP, both to the lmtp
1252 transport and to the smtp transport in LMTP mode.
1254 TK/02 Remove one case of BASE64 error detection FTTB (undocumented anyway).
1256 PH/12 There was a missing call to search_tidyup() before the fork() in rda.c to
1257 run a filter in a subprocess. This could lead to confusion in subsequent
1258 lookups in the parent process. There should also be a search_tidyup() at
1259 the end of the subprocess.
1261 PH/13 Previously, if "verify = helo" was set in an ACL, the condition was true
1262 only if the host matched helo_try_verify_hosts, which caused the
1263 verification to occur when the EHLO/HELO command was issued. The ACL just
1264 tested the remembered result. Now, if a previous verification attempt has
1265 not happened, "verify = helo" does it there and then.
1267 JJ/01 exipick: added $message_exim_id variable (see 4.53-PH/04)
1269 TK/03 Fix log output including CR from clamd.
1271 PH/14 A reference to $reply_address when Reply-to: was empty and From: did not
1272 exist provoked a memory error which could cause a segfault.
1274 PH/15 Installed PCRE 6.2
1276 PH/17 Defined BIND_8_COMPAT in the Darwin os.h file.
1278 PH/18 Reversed 4.52/PH/17 because the HP-UX user found it wasn't the cause
1279 of the problem. Specifically, suggested +O2 rather than +O1 for the
1282 PH/19 Added sqlite_lock_timeout option (David Woodhouse's patch).
1284 PH/20 If a delivery was routed to a non-standard port by means of an SRV
1285 record, the port was not correctly logged when the outgoing_port log
1286 selector was set (it logged the transort's default port).
1288 PH/21 Added support for host-specific ports to manualroute, queryprogram,
1289 fallback_hosts, and "hosts" in the smtp transport.
1291 PH/22 If the log selector "outgoing_port" is set, the port is now also given on
1292 host errors such as "Connection refused".
1294 PH/23 Applied a patch to fix problems with exim-4.52 while doing radius
1295 authentication with radiusclient 0.4.9:
1297 - Error returned from rc_read_config was caught wrongly
1298 - Username/password not passed on to radius server due to wrong length.
1300 The presumption is that some radiusclient API changes for 4.51/PH/17
1301 were not taken care of correctly. The code is still untested by me (my
1302 Linux distribution still has 0.3.2 of radiusclient), but it was
1303 contributed by a Radius user.
1305 PH/24 When doing a callout, the value of $domain wasn't set correctly when
1306 expanding the "port" option of the smtp transport.
1308 TK/04 MIME ACL: Fix buffer underrun that occurs when EOF condition is met
1309 while reading a MIME header. Thanks to Tom Hughes for a patch.
1311 PH/24 Include config.h inside local_scan.h so that configuration settings are
1314 PH/25 Make $smtp_command_argument available after all SMTP commands. This means
1315 that in an ACL for RCPT (for example), you can examine exactly what was
1318 PH/26 Exim was recognizing IPv6 addresses of the form [IPv6:....] in EHLO
1319 commands, but it was not correctly comparing the address with the actual
1320 client host address. Thus, it would show the EHLO address in Received:
1321 header lines when this was not necessary.
1323 PH/27 Added the % operator to ${eval:}.
1325 PH/28 Exim tries to create and chdir to its spool directory when it starts;
1326 it should be ignoring failures (because with -C, for example, it has lost
1327 privilege). It wasn't ignoring creation failures other than "already
1330 PH/29 Added "crypteq" to the list of supported features that Exim outputs when
1333 PH/30 Fixed (presumably very longstanding) bug in exim_dbmbuild: if it failed
1334 because an input line was too long, either on its own, or by virtue of
1335 too many continuations, the temporary file was not being removed, and the
1336 return code was incorrect.
1338 PH/31 Missing "BOOL" in function definition in filtertest.c.
1340 PH/32 Applied Sieve patches from the maintainer.
1342 TK/05 Domainkeys: Accomodate for a minor API change in libdomainkeys 0.67.
1344 PH/33 Added "verify = not_blind".
1346 PH/34 There are settings for CHOWN_COMMAND and MV_COMMAND that can be used in
1347 Local/Makefile (with some defaults set). These are used in built scripts
1348 such as exicyclog, but they have never been used in the exim_install
1349 script (though there are many overriding facilities there). I have
1350 arranged that the exim_install script now takes note of these two
1353 PH/35 Installed configuration files for Dragonfly.
1355 PH/36 When a locally submitted message by a trusted user did not contain a
1356 From: header, and the sender address was obtained from -f or from an SMTP
1357 MAIL command, and the trusted user did not use -F to supply a sender
1358 name, $originator_name was incorrectly used when constructing a From:
1359 header. Furthermore, $originator_name was used for submission mode
1360 messages from external hosts without From: headers in a similar way,
1361 which is clearly wrong.
1363 PH/37 Added control=suppress_local_fixups.
1365 PH/38 When log_selector = +received_sender was set, and the addition of the
1366 sender made the log line's construction buffer exactly full, or one byte
1367 less than full, an overflow happened when the terminating "\n" was
1370 PH/39 Added a new log selector, "unknown_in_list", which provokes a log entry
1371 when the result of a list match is failure because a DNS lookup failed.
1373 PH/40 RM_COMMAND is now used in the building process.
1375 PH/41 Added a "distclean" target to the top-level Makefile; it deletes all
1376 the "build-* directories that it finds.
1378 PH/42 (But a TF fix): In a domain list, Exim incorrectly matched @[] if the IP
1379 address in a domain literal was a prefix of an interface address.
1381 PH/43 (Again a TF fix): In the dnslookup router, do not apply widen_domains
1382 when verifying a sender address, unless rewrite_headers is false.
1384 PH/44 Wrote a long comment about why errors_to addresses are verified as
1385 recipients, not senders.
1387 TF/01 Add missing LIBS=-lm to OS/Makefile-OpenBSD which was overlooked when
1388 the ratelimit ACL was added.
1390 PH/45 Added $smtp_command for the full command (cf $smtp_command_argument).
1392 PH/46 Added extra information about PostgreSQL errors to the error string.
1394 PH/47 Added an interface to a fake DNS resolver for use by the new test suite,
1395 avoiding the need to install special zones in a real server. This is
1396 backwards compatible; if it can't find the fake resolver, it drops back.
1397 Thus, both old and new test suites can be run.
1399 TF/02 Added util/ratelimit.pl
1401 TF/03 Minor fix to the ratelimit code to improve its behaviour in case the
1402 clock is set back in time.
1404 TF/04 Fix the ratelimit support in exim_fixdb. Patch provided by Brian
1405 Candler <B.Candler@pobox.com>.
1407 TF/05 The fix for PH/43 was not completely correct; widen_domains is always
1408 OK for addresses that are the result of redirections.
1410 PH/48 A number of further additions for the benefit of the new test suite,
1411 including a fake gethostbyname() that interfaces to the fake DNS resolver
1414 TF/06 The fix for widen_domains has also been applied to qualify_single and
1415 search_parents which are the other dnslookup options that can cause
1418 PH/49 Michael Haardt's randomized retrying, but as a separate retry parameter
1421 PH/50 Make never_users, trusted_users, admin_groups, trusted_groups expandable.
1423 TF/07 Exim produced the error message "an SRV record indicated no SMTP
1424 service" if it encountered an MX record with an empty target hostname.
1425 The message is now "an MX or SRV record indicated no SMTP service".
1427 TF/08 Change PH/13 introduced the possibility that verify=helo may defer,
1428 if the DNS of the sending site is misconfigured. This is quite a
1429 common situation. This change restores the behaviour of treating a
1430 helo verification defer as a failure.
1432 PH/51 If self=fail was set on a router, the bounce message did not include the
1433 actual error message.
1439 TF/01 Added support for Client SMTP Authorization. See NewStuff for details.
1441 PH/01 When a transport filter timed out in a pipe delivery, and the pipe
1442 command itself ended in error, the underlying message about the transport
1443 filter timeout was being overwritten with the pipe command error. Now the
1444 underlying error message should be appended to the second error message.
1446 TK/01 Fix poll() being unavailable on Mac OSX 10.2.
1448 PH/02 Reduce the amount of output that "make" produces by default. Full output
1449 can still be requested.
1451 PH/03 The warning log line about a condition test deferring for a "warn" verb
1452 was being output only once per connection, rather than after each
1453 occurrence (because it was using the same function as for successful
1454 "warn" verbs). This seems wrong, so I have changed it.
1456 TF/02 Two buglets in acl.c which caused Exim to read a few bytes of memory that
1457 it should not have, which might have caused a crash in the right
1458 circumstances, but probably never did.
1460 PH/04 Installed a modified version of Tony Finch's patch to make submission
1461 mode fix the return path as well as the Sender: header line, and to
1462 add a /name= option so that you can make the user's friendly name appear
1465 TF/03 Added the control = fakedefer ACL modifier.
1467 TF/04 Added the ratelimit ACL condition. See NewStuff for details. Thanks to
1468 Mark Lowes for thorough testing.
1470 TK/02 Rewrote SPF support to work with libspf2 versions >1.2.0.
1472 TK/03 Merged latest SRS patch from Miles Wilton.
1474 PH/05 There's a shambles in IRIX6 - it defines EX_OK in unistd.h which conflicts
1475 with the definition in sysexits.h (which is #included earlier).
1476 Fortunately, Exim does not actually use EX_OK. The code used to try to
1477 preserve the sysexits.h value, by assumimg that macro definitions were
1478 scanned for macro replacements. I have been disabused of this notion,
1479 so now the code just undefines EX_OK before #including unistd.h.
1481 PH/06 There is a timeout for writing blocks of data, set by, e.g. data_timeout
1482 in the smtp transport. When a block could not be written in a single
1483 write() function, the timeout was being re-applied to each part-write.
1484 This seems wrong - if the receiver was accepting one byte at a time it
1485 would take for ever. The timeout is now adjusted when this happens. It
1486 doesn't have to be particularly precise.
1488 TK/04 Added simple SPF lookup method in EXPERIMENTAL_SPF. See NewStuff for
1489 details. Thanks to Chris Webb <chris@arachsys.com> for the patch!
1491 PH/07 Added "fullpostmaster" verify option, which does a check to <postmaster>
1492 without a domain if the check to <postmaster@domain> fails.
1494 SC/01 Eximstats: added -xls and the ability to specify output files
1495 (patch written by Frank Heydlauf).
1497 SC/02 Eximstats: use FileHandles for outputing results.
1499 SC/03 Eximstats: allow any combination of xls, txt, and html output.
1501 SC/04 Eximstats: fixed display of large numbers with -nvr option
1503 SC/05 Eximstats: fixed merging of reports with empty tables.
1505 SC/06 Eximstats: added the -include_original_destination flag
1507 SC/07 Eximstats: removed tabs and trailing whitespace.
1509 TK/05 Malware: Improve on aveserver error handling. Patch from Alex Miller.
1511 TK/06 MBOX spool code: Add real "From " MBOX separator line
1512 so the .eml file is really in mbox format (even though
1513 most programs do not really care). Patch from Alex Miller.
1515 TK/07 MBOX spool code: Add X-Envelope-From: and X-Envelope-To: headers.
1516 The latter is generated from $received_to and is only set if the
1517 message has one envelope recipient. SA can use these headers,
1518 obviously out-of-the-box. Patch from Alex Miller.
1520 PH/08 The ${def test on a variable was returning false if the variable's
1521 value was "0", contrary to what the specification has always said!
1522 The result should be true unless the variable is empty.
1524 PH/09 The syntax error of a character other than { following "${if
1525 def:variable_name" (after optional whitespace) was not being diagnosed.
1526 An expansion such as ${if def:sender_ident:{xxx}{yyy}} in which an
1527 accidental colon was present, for example, could give incorrect results.
1529 PH/10 Tidied the code in a number of places where the st_size field of a stat()
1530 result is used (not including appendfile, where other changes are about
1533 PH/11 Upgraded appendfile so that quotas larger than 2G are now supported.
1534 This involved changing a lot of size variables from int to off_t. It
1535 should work with maildirs and everything.
1537 TK/08 Apply fix provided by Michael Haardt to prevent deadlock in case of
1538 spamd dying while we are connected to it.
1540 TF/05 Fixed a ${extract error message typo reported by Jeremy Harris
1543 PH/12 Applied Alex Kiernan's patch for the API change for the error callback
1544 function for BDB 4.3.
1546 PH/13 Changed auto_thaw such that it does not apply to bounce messages.
1548 PH/14 Imported PCRE 6.0; this was more than just a trivial operation because
1549 the sources for PCRE have been re-arranged and more files are now
1552 PH/15 The code I had for printing potentially long long variables in PH/11
1553 above was not the best (it lost precision). The length of off_t variables
1554 is now inspected at build time, and an appropriate printing format (%ld
1555 or %lld) is chosen and #defined by OFF_T_FMT. We also define LONGLONG_T
1556 to be "long long int" or "long int". This is needed for the internal
1557 formatting function string_vformat().
1559 PH/16 Applied Matthew Newton's patch to exicyclog: "If log_file_path is set in
1560 the configuration file to be ":syslog", then the script "guesses" where
1561 the logs files are, rather than using the compiled in default. In our
1562 case the guess is not the same as the compiled default, so the script
1563 suddenly stopped working when I started to use syslog. The patch checks
1564 to see if log_file_path is "". If so, it attempts to read it from exim
1565 with no configuration file to get the compiled in version, before it
1566 falls back to the previous guessing code."
1568 TK/09 Added "prvs" and "prvscheck" expansion items. These help a lot with
1569 implementing BATV in an Exim configuration. See NewStuff for the gory
1572 PH/17 Applied Michael Haardt's patch for HP-UX, affecting only the os.h and
1573 Makefile that are specific to HP-UX.
1575 PH/18 If the "use_postmaster" option was set for a recipient callout together
1576 with the "random" option, the postmaster address was used as the MAIL
1577 FROM address for the random test, but not for the subsequent recipient
1578 test. It is now used for both.
1580 PH/19 Applied Michael Haardt's patch to update Sieve to RFC3028bis. "The
1581 patch removes a few documentation additions to RFC 3028, because the
1582 latest draft now contains them. It adds the new en;ascii-case comparator
1583 and a new error check for 8bit text in MIME parts. Comparator and
1584 require names are now matched exactly. I enabled the subaddress
1585 extension, but it is not well tested yet (read: it works for me)."
1587 PH/20 Added macros for time_t as for off_t (see PH/15 above) and used them to
1588 rework some of the code of TK/09 above to avoid the hardwired use of
1589 "%lld" and "long long". Replaced the call to snprintf() with a call to
1592 PH/21 Added some other messages to those in 4.51/PH/42, namely "All relevant MX
1593 records point to non-existent hosts", "retry timeout exceeded", and
1594 "retry time not reached for any host after a long failure period".
1596 PH/22 Fixed some oversights/typos causing bugs when Exim is compiled with
1597 experimental DomainKeys support:
1599 (1) The filter variables $n0-$n9 and $sn0-$sn9 were broken.
1600 (2) On an error such as an illegally used "control", the wrong name for
1601 the control was given.
1603 These problems did NOT occur unless DomainKeys support was compiled.
1605 PH/23 Added daemon_startup_retries and daemon_startup_sleep.
1607 PH/24 Added ${if match_ip condition.
1609 PH/25 Put debug statements on either side of calls to EXIM_DBOPEN() for hints
1610 databases so that it will be absolutely obvious if a crash occurs in the
1611 DB library. This is a regular occurrence (often caused by mis-matched
1614 PH/26 Insert a lot of missing (void) casts for functions such as chown(),
1615 chmod(), fcntl(), sscanf(), and other functions from stdio.h. These were
1616 picked up on a user's system that detects such things. There doesn't seem
1617 to be a gcc warning option for this - only an attribute that has to be
1618 put on the function's prototype. It seems that in Fedora Core 4 they have
1619 set this on a number of new functions. No doubt there will be more in due
1622 PH/27 If a dnslookup or manualroute router is set with verify=only, it need not
1623 specify a transport. However, if an address that was verified by such a
1624 router was the subject of a callout, Exim crashed because it tried to
1625 read the rcpt_include_affixes from the non-existent transport. Now it
1626 just assumes that the setting of that option is false. This bug was
1627 introduced by 4.51/PH/31.
1629 PH/28 Changed -d+all to exclude +memory, because that information is very
1630 rarely of interest, but it makes the output a lot bigger. People tend to
1631 do -d+all out of habit.
1633 PH/29 Removed support for the Linux-libc5 build, as it is obsolete and the
1634 code in os-type was giving problems when libc.so lives in lib64, like on
1637 PH/30 Exim's DNS code uses the original T_xxx names for DNS record times. These
1638 aren't the modern standard, and it seems that some systems' include files
1639 don't always have them. Exim was already checking for some of the newer
1640 ones like T_AAAA, and defining it itself. I've added checks for all the
1641 record types that Exim uses.
1643 PH/31 When using GnuTLS, if the parameters cache file did not exist, Exim was
1644 not automatically generating a new one, as it is supposed to. This
1645 prevented TLS from working. If the file did exist, but contained invalid
1646 data, a new version was generated, as expected. It was only the case of a
1647 non-existent file that was broken.
1649 TK/10 Domainkeys: Fix a bug in verification that caused a crash in conjunction
1650 with a change in libdomainkeys > 0.64.
1652 TK/11 Domainkeys: Change the logic how the "testing" policy flag is retrieved
1653 from DNS. If the selector record carries the flag, it now has
1654 precedence over the domain-wide flag.
1656 TK/12 Cleared some compiler warnings related to SPF, SRS and DK code.
1658 PH/32 In mua_wrapper mode, if an smtp transport configuration error (such as
1659 the use of a port name that isn't defined in /etc/services) occurred, the
1660 message was deferred as in a normal delivery, and thus remained on the
1661 spool, instead of being failed because of the mua_wrapper setting. This
1662 is now fixed, and I tidied up some of the mua_wrapper messages at the
1665 SC/08 Eximstats: whilst parsing the mainlog(s), store information about
1666 the messages in a hash of arrays rather than using individual hashes.
1667 This is a bit cleaner and results in dramatic memory savings, albeit
1668 at a slight CPU cost.
1670 SC/09 Eximstats: added the -show_rt<list> and the -show_dt<list> flags
1671 as requested by Marc Sherman.
1673 SC/10 Eximstats: added histograms for user specified patterns as requested
1676 SC/11 Eximstats: v1.43 - bugfix for pattern histograms with -h0 specified.
1678 PH/33 Patch from the Cygwin maintainer to add "b" to all occurences of
1679 fopen() in the content-scanning modules that did not already have it.
1685 TK/01 Added Yahoo DomainKeys support via libdomainkeys. See
1686 doc/experimental-spec.txt for details. (http://domainkeys.sf.net)
1688 TK/02 Fix ACL "control" statement not being available in MIME ACL.
1690 TK/03 Fix ACL "regex" condition not being available in MIME ACL.
1692 PH/01 Installed a patch from the Sieve maintainer that allows -bf to be used
1693 to test Sieve filters that use "vacation".
1695 PH/02 Installed a slightly modified version of Nikos Mavrogiannopoulos' patch
1696 that changes the way the GnuTLS parameters are stored in the cache file.
1697 The new format can be generated externally. For backward compatibility,
1698 if the data in the cache doesn't make sense, Exim assumes it has read an
1699 old-format file, and it generates new data and writes a new file. This
1700 means that you can't go back to an older release without removing the
1703 PH/03 A redirect router that has both "unseen" and "one_time" set does not
1704 work if there are any delivery delays because "one_time" forces the
1705 parent to be marked "delivered", so its unseen clone is never tried
1706 again. For this reason, Exim now forbids the simultaneous setting of
1709 PH/04 Change 4.11/85 fixed an obscure bug concerned with addresses that are
1710 redirected to themselves ("homonym" addresses). Read the long ChangeLog
1711 entry if you want to know the details. The fix, however, neglected to
1712 consider the case when local delivery batching is involved. The test for
1713 "previously delivered" was not happening when checking to see if an
1714 address could be batched with a previous (undelivered) one; under
1715 certain circumstances this could lead to multiple deliveries to the same
1718 PH/05 Renamed the macro SOCKLEN_T as EXIM_SOCKLEN_T because AIX uses SOCKLEN_T
1719 in its include files, and this causes problems building Exim.
1721 PH/06 A number of "verify =" ACL conditions have no options (e.g. verify =
1722 header_syntax) but Exim was just ignoring anything given after a slash.
1723 In particular, this caused confusion with an attempt to use "verify =
1724 reverse_host_lookup/defer_ok". An error is now given when options are
1725 supplied for verify items that do not have them. (Maybe reverse_host_
1726 lookup should have a defer_ok option, but that's a different point.)
1728 PH/07 Increase the size of the buffer for incoming SMTP commands from 512 (as
1729 defined by RFC 821) to 2048, because there were problems with some AUTH
1730 commands, and RFC 1869 says the size should be increased for extended
1731 SMTP commands that take arguments.
1733 PH/08 Added ${dlfunc dynamically loaded function for expansion (code from Tony
1736 PH/09 Previously, an attempt to use ${perl when it wasn't compiled gave an
1737 "unknown" error; now it says that the functionality isn't in the binary.
1739 PH/10 Added a nasty fudge to try to recognize and flatten LDAP passwords in
1740 an address' error message when a string expansion fails (syntax or
1741 whatever). Otherwise the password may appear in the log. Following change
1742 PH/42 below, there is no longer a chance of it appearing in a bounce
1745 PH/11 Installed exipick version 20050225.0 from John Jetmore.
1747 PH/12 If the last host in a fallback_hosts list was multihomed, only the first
1748 of its addresses was ever tried. (Bugzilla bug #2.)
1750 PH/13 If "headers_add" in a transport didn't end in a newline, Exim printed
1751 the result incorrectly in the debug output. (It correctly added a newline
1752 to what was transported.)
1754 TF/01 Added $received_time.
1756 PH/14 Modified the default configuration to add an acl_smtp_data ACL, with
1757 commented out examples of how to interface to a virus scanner and to
1758 SpamAssassin. Also added commented examples of av_scanner and
1759 spamd_address settings.
1761 PH/15 Further to TK/02 and TK/03 above, tidied up the tables of what conditions
1762 and controls are allowed in which ACLs. There were a couple of minor
1763 errors. Some of the entries in the conditions table (which is a table of
1764 where they are NOT allowed) were getting very unwieldy; rewrote them as a
1765 negation of where the condition IS allowed.
1767 PH/16 Installed updated OS/os.c-cygwin from the Cygwin maintainer.
1769 PH/17 The API for radiusclient changed at release 0.4.0. Unfortunately, the
1770 header file does not have a version number, so I've had to invent a new
1771 value for RADIUS_LIB_TYPE, namely "RADIUSCLIENTNEW" to request the new
1772 API. The code is untested by me (my Linux distribution still has 0.3.2 of
1773 radiusclient), but it was contributed by a Radius user.
1775 PH/18 Installed Lars Mainka's patch for the support of CRL collections in
1776 files or directories, for OpenSSL.
1778 PH/19 When an Exim process that is running as root has to create an Exim log
1779 file, it does so in a subprocess that runs as exim:exim so as to get the
1780 ownership right at creation (otherwise, other Exim processes might see
1781 the file with the wrong ownership). There was no test for failure of this
1782 fork() call, which would lead to the process getting stuck as it waited
1783 for a non-existent subprocess. Forks do occasionally fail when resources
1784 run out. I reviewed all the other calls to fork(); they all seem to check
1787 PH/20 When checking for unexpected SMTP input at connect time (before writing
1788 the banner), Exim was not dealing correctly with a non-positive return
1789 from the read() function. If the client had disconnected by this time,
1790 the result was a log entry for a synchronization error with an empty
1791 string after "input=" when read() returned zero. If read() returned -1
1792 (an event I could not check), uninitialized data bytes were printed.
1793 There were reports of junk text (parts of files, etc) appearing after
1796 PH/21 Added acl_not_smtp_mime to allow for MIME scanning for non-SMTP messages.
1798 PH/22 Added support for macro redefinition, and (re)definition in between
1799 driver and ACL definitions.
1801 PH/23 The cyrus_sasl authenticator was expanding server_hostname, but then
1802 forgetting to use the resulting value; it was using the unexpanded value.
1804 PH/24 The cyrus_sasl authenticator was advertising mechanisms for which it
1805 hadn't been configured. The fix is from Juergen Kreileder, who
1806 understands it better than I do:
1808 "Here's what I see happening with three configured cyrus_sasl
1809 authenticators configured (plain, login, cram-md5):
1811 On startup auth_cyrus_sasl_init() gets called for each of these.
1812 This means three calls to sasl_listmech() without a specified mech_list.
1813 => SASL tests which mechs of all available mechs actually work
1814 => three warnings about OTP not working
1815 => the returned list contains: plain, login, cram-md5, digest-md5, ...
1817 With the patch, sasl_listmech() also gets called three times. But now
1818 SASL's mech_list option is set to the server_mech specified in the the
1819 authenticator. Or in other words, the answer from sasl_listmech()
1820 gets limited to just the mech you're testing for (which is different
1822 => the return list contains just 'plain' or 'login', 'cram-md5' or
1823 nothing depending on the value of ob->server_mech.
1825 I've just tested the patch: Authentication still works fine,
1826 unavailable mechs specified in the exim configuration are still
1827 caught, and the auth.log warnings about OTP are gone."
1829 PH/25 When debugging is enabled, the contents of the command line are added
1830 to the debugging output, even when log_selector=+arguments is not
1833 PH/26 Change scripts/os-type so that when "uname -s" returns just "GNU", the
1834 answer is "GNU", and only if the return is "GNU/something" is the answer
1837 PH/27 $acl_verify_message is now set immediately after the failure of a
1838 verification in an ACL, and so is available in subsequent modifiers. In
1839 particular, the message can be preserved by coding like this:
1841 warn !verify = sender
1842 set acl_m0 = $acl_verify_message
1844 Previously, $acl_verify_message was set only while expanding "message"
1845 and "log_message" when a very denied access.
1847 PH/28 Modified OS/os.c-Linux with
1849 -#ifndef OS_LOAD_AVERAGE
1850 +#if !defined(OS_LOAD_AVERAGE) && defined(__linux__)
1852 to make Exim compile on kfreebsd-gnu. (I'm totally confused about the
1853 nomenclature these days.)
1855 PH/29 Installed patch from the Sieve maintainer that adds the options
1856 sieve_useraddress and sieve_subaddress to the redirect router.
1858 PH/30 In these circumstances:
1859 . Two addresses routed to the same list of hosts;
1860 . First host does not offer TLS;
1861 . First host accepts first address;
1862 . First host gives temporary error to second address;
1863 . Second host offers TLS and a TLS session is established;
1864 . Second host accepts second address.
1865 Exim incorrectly logged both deliveries with the TLS parameters (cipher
1866 and peerdn, if requested) that were in fact used only for the second
1869 PH/31 When doing a callout as part of verifying an address, Exim was not paying
1870 attention to any local part prefix or suffix that was matched by the
1871 router that accepted the address. It now behaves in the same way as it
1872 does for delivery: the affixes are removed from the local part unless
1873 rcpt_include_affixes is set on the transport.
1875 PH/32 Add the sender address, as F=<...>, to the log line when logging a
1876 timeout during the DATA phase of an incoming message.
1878 PH/33 Sieve envelope tests were broken for match types other than :is. I have
1879 applied a patch sanctioned by the Sieve maintainer.
1881 PH/34 Change 4.50/80 broke Exim in that it could no longer handle cases where
1882 the uid or gid is negative. A case of a negative gid caused this to be
1883 noticed. The fix allows for either to be negative.
1885 PH/35 ACL_WHERE_MIME is now declared unconditionally, to avoid too much code
1886 clutter, but the tables that are indexed by ACL_WHERE_xxx values had been
1889 PH/36 The change PH/12 above was broken. Fixed it.
1891 PH/37 Exim used to check for duplicate addresses in the middle of routing, on
1892 the grounds that routing the same address twice would always produce the
1893 same answer. This might have been true once, but it is certainly no
1894 longer true now. Routing a child address may depend on the previous
1895 routing that produced that child. Some complicated redirection strategies
1896 went wrong when messages had multiple recipients, and made Exim's
1897 behaviour dependent on the order in which the addresses were given.
1899 I have moved the duplicate checking until after the routing is complete.
1900 Exim scans the addresses that are assigned to local and remote
1901 transports, and removes any duplicates. This means that more work will be
1902 done, as duplicates will always all be routed, but duplicates are
1903 presumably rare, so I don't expect this is of any significance.
1905 For deliveries to pipes, files, and autoreplies, the duplicate checking
1906 still happens during the routing process, since they are not going to be
1909 PH/38 Installed a patch from Ian Freislich, with the agreement of Tom Kistner.
1910 It corrects a timeout issue with spamd. This is Ian's comment: "The
1911 background is that sometimes spamd either never reads data from a
1912 connection it has accepted, or it never writes response data. The exiscan
1913 spam.[ch] uses a 3600 second timeout on spamd socket reads, further, it
1914 blindly assumes that writes won't block so it may never time out."
1916 PH/39 Allow G after quota size as well as K and M.
1918 PH/40 The value set for $authenticated_id in an authenticator may not contain
1919 binary zeroes or newlines because the value is written to log lines and
1920 to spool files. There was no check on this. Now the value is run through
1921 the string_printing() function so that such characters are converted to
1922 printable escape sequences.
1924 PH/41 $message_linecount is a new variable that contains the total number of
1925 lines in the message. Compare $body_linecount, which is the count for the
1928 PH/42 Exim no longer gives details of delivery errors for specific addresses in
1929 bounce and delay warning messages, except in certain special cases, which
1932 (a) An SMTP error message from a remote host;
1933 (b) A message specified in a :fail: redirection;
1934 (c) A message specified in a "fail" command in a system filter;
1935 (d) A message specified in a FAIL return from the queryprogram router;
1936 (e) A message specified by the cannot_route_message router option.
1938 In these cases only, Exim does include the error details in bounce and
1939 warning messages. There are also a few cases where bland messages such
1940 as "unrouteable address" or "local delivery error" are given.
1942 PH/43 $value is now also set for the "else" part of a ${run expansion.
1944 PH/44 Applied patch from the Sieve maintainer: "The vacation draft is still
1945 being worked on, but at least Exim now implements the latest version to
1948 PH/45 In a pipe transport, although a timeout while waiting for the pipe
1949 process to complete was treated as a delivery failure, a timeout while
1950 writing the message to the pipe was logged, but erroneously treated as a
1951 successful delivery. Such timeouts include transport filter timeouts. For
1952 consistency with the overall process timeout, these timeouts are now
1953 treated as errors, giving rise to delivery failures by default. However,
1954 there is now a new Boolean option for the pipe transport called
1955 timeout_defer, which, if set TRUE, converts the failures into defers for
1956 both kinds of timeout. A transport filter timeout is now identified in
1959 PH/46 The "scripts/Configure-config.h" script calls "make" at one point. On
1960 systems where "make" and "gmake" are different, calling "gmake" at top
1961 level broke things. I've arranged for the value of $(MAKE) to be passed
1962 from the Makefile to this script so that it can call the same version of
1966 A note about Exim versions 4.44 and 4.50
1967 ----------------------------------------
1969 Exim 4.50 was meant to be the next release after 4.43. It contains a lot of
1970 changes of various kinds. As a consequence, a big documentation update was
1971 needed. This delayed the release for rather longer than seemed good, especially
1972 in the light of a couple of (minor) security issues. Therefore, the changes
1973 that fixed bugs were backported into 4.43, to create a 4.44 maintenance
1974 release. So 4.44 and 4.50 are in effect two different branches that both start
1977 I have left the 4.50 change log unchanged; it contains all the changes since
1978 4.43. The change log for 4.44 is below; many of its items are identical to
1979 those for 4.50. This seems to be the most sensible way to preserve the
1980 historical information.
1986 1. Minor wording change to the doc/README.SIEVE file.
1988 2. Change 4.43/35 introduced a bug: if quota_filecount was set, the
1989 computation of the current number of files was incorrect.
1991 3. Closing a stable door: arrange to panic-die if setitimer() ever fails. The
1992 bug fixed in 4.43/37 would have been diagnosed quickly if this had been in
1995 4. Give more explanation in the error message when the command for a transport
1996 filter fails to execute.
1998 5. There are several places where Exim runs a non-Exim command in a
1999 subprocess. The SIGUSR1 signal should be disabled for these processes. This
2000 was being done only for the command run by the queryprogram router. It is
2001 now done for all such subprocesses. The other cases are: ${run, transport
2002 filters, and the commands run by the lmtp and pipe transports.
2004 6. Added CONFIGURE_GROUP build-time option.
2006 7. Some older OS have a limit of 256 on the maximum number of file
2007 descriptors. Exim was using setrlimit() to set 1000 as a large value
2008 unlikely to be exceeded. Change 4.43/17 caused a lot of logging on these
2009 systems. I've change it so that if it can't get 1000, it tries for 256.
2011 8. "control=submission" was allowed, but had no effect, in a DATA ACL. This
2012 was an oversight, and furthermore, ever since the addition of extra
2013 controls (e.g. 4.43/32), the checks on when to allow different forms of
2014 "control" were broken. There should now be diagnostics for all cases when a
2015 control that does not make sense is encountered.
2017 9. Added the /retain_sender option to "control=submission".
2019 10. $recipients is now available in the predata ACL (oversight).
2021 11. Tidy the search cache before the fork to do a delivery from a message
2022 received from the command line. Otherwise the child will trigger a lookup
2023 failure and thereby defer the delivery if it tries to use (for example) a
2024 cached ldap connection that the parent has called unbind on.
2026 12. If verify=recipient was followed by verify=sender in a RCPT ACL, the value
2027 of $address_data from the recipient verification was clobbered by the
2028 sender verification.
2030 13. The value of address_data from a sender verification is now available in
2031 $sender_address_data in subsequent conditions in the ACL statement.
2033 14. Added forbid_sieve_filter and forbid_exim_filter to the redirect router.
2035 15. Added a new option "connect=<time>" to callout options, to set a different
2038 16. If FIXED_NEVER_USERS was defined, but empty, Exim was assuming the uid 0
2039 was its contents. (It was OK if the option was not defined at all.)
2041 17. A "Completed" log line is now written for messages that are removed from
2042 the spool by the -Mrm option.
2044 18. New variables $sender_verify_failure and $recipient_verify_failure contain
2045 information about exactly what failed.
2047 19. Added -dd to debug only the daemon process.
2049 20. Incorporated Michael Haardt's patch to ldap.c for improving the way it
2050 handles timeouts, both on the server side and network timeouts. Renamed the
2051 CONNECT parameter as NETTIMEOUT (but kept the old name for compatibility).
2053 21. The rare case of EHLO->STARTTLS->HELO was setting the protocol to "smtp".
2054 It is now set to "smtps".
2056 22. $host_address is now set to the target address during the checking of
2057 ignore_target_hosts.
2059 23. When checking ignore_target_hosts for an ipliteral router, no host name was
2060 being passed; this would have caused $sender_host_name to have been used if
2061 matching the list had actually called for a host name (not very likely,
2062 since this list is usually IP addresses). A host name is now passed as
2065 24. Changed the calls that set up the SIGCHLD handler in the daemon to use the
2066 code that specifies a non-restarting handler (typically sigaction() in
2067 modern systems) in an attempt to fix a rare and obscure crash bug.
2069 25. Narrowed the window for a race in the daemon that could cause it to ignore
2070 SIGCHLD signals. This is not a major problem, because they are used only to
2071 wake it up if nothing else does.
2073 26. A malformed maildirsize file could cause Exim to calculate negative values
2074 for the mailbox size or file count. Odd effects could occur as a result.
2075 The maildirsize information is now recalculated if the size or filecount
2078 27. Added HAVE_SYS_STATVFS_H to the os.h file for Linux, as it has had this
2079 support for a long time. Removed HAVE_SYS_VFS_H.
2081 28. Installed the latest version of exipick from John Jetmore.
2083 29. In an address list, if the pattern was not a regular expression, an empty
2084 subject address (from a bounce message) matched only if the pattern was an
2085 empty string. Non-empty patterns were not even tested. This was the wrong
2086 because it is perfectly reasonable to use an empty address as part of a
2087 database query. An empty address is now tested by patterns that are
2088 lookups. However, all the other forms of pattern expect the subject to
2089 contain a local part and a domain, and therefore, for them, an empty
2090 address still always fails if the pattern is not itself empty.
2092 30. Exim went into a mad DNS loop when attempting to do a callout where the
2093 host was specified on an smtp transport, and looking it up yielded more
2094 than one IP address.
2096 31. Re-factored the code for checking spool and log partition space into a
2097 function that finds that data and another that does the check. The former
2098 is then used to implement four new variables: $spool_space, $log_space,
2099 $spool_inodes, and $log_inodes.
2101 32. The RFC2047 encoding function was originally intended for short strings
2102 such as real names; it was not keeping to the 75-character limit for
2103 encoded words that the RFC imposes. It now respects the limit, and
2104 generates multiple encoded words if necessary. To be on the safe side, I
2105 have increased the buffer size for the ${rfc2047: expansion operator from
2108 33. It is now permitted to omit both strings after an "if" condition; if the
2109 condition is true, the result is "true". As before, when the second string
2110 is omitted, a false condition yields an empty string. This makes it less
2111 cumbersome to write custom ACL and router conditions.
2113 34. Failure to deliver a bounce message always caused it to be frozen, even if
2114 there was an errors_to setting on the router. The errors_to setting is now
2117 35. If an IPv6 address is given for -bh or -bhc, it is now converted to the
2118 canonical form (fully expanded) before being placed in
2119 $sender_host_address.
2121 36. The table in the code that translates DNS record types into text (T_A to
2122 "A" for instance) was missing entries for NS and CNAME. It is just possible
2123 that this could have caused confusion if both these types were looked up
2124 for the same domain, because the text type is used as part of Exim's
2125 per-process caching. But the chance of anyone hitting this buglet seems
2128 37. The dnsdb lookup has been extended in a number of ways.
2130 (1) There is a new type, "zns", which walks up the domain tree until it
2131 finds some nameserver records. It should be used with care.
2133 (2) There is a new type, "mxh", which is like "mx" except that it returns
2134 just the host names, not the priorities.
2136 (3) It is now possible to give a list of domains (or IP addresses) to be
2137 looked up. The behaviour when one of the lookups defers can be
2138 controlled by a keyword.
2140 (4) It is now possible to specify the separator character for use when
2141 multiple records are returned.
2143 38. The dnslists ACL condition has been extended: it is now possible to supply
2144 a list of IP addresses and/or domains to be looked up in a particular DNS
2147 39. Added log_selector=+queue_time_overall.
2149 40. When running the queue in the test harness, wait just a tad after forking a
2150 delivery process, to get repeatability of debugging output.
2152 41. Include certificate and key file names in error message when GnuTLS fails
2153 to set them up, because the GnuTLS error message doesn't include the name
2154 of the failing file when there is a problem reading it.
2156 42. Allow both -bf and -bF in the same test run.
2158 43. Did the same fix as 41 above for OpenSSL, which had the same infelicity.
2160 44. The "Exiscan patch" is now merged into the mainline Exim source.
2162 45. Sometimes the final signoff response after QUIT could fail to get
2163 transmitted in the non-TLS case. Testing !tls_active instead of tls_active
2164 < 0 before doing a fflush(). This bug looks as though it goes back to the
2165 introduction of TLS in release 3.20, but "sometimes" must have been rare
2166 because the tests only now provoked it.
2168 46. Reset the locale to "C" after calling embedded Perl, in case it was changed
2169 (this can affect the format of dates).
2171 47. exim_tidydb, when checking for the continued existence of a message for
2172 which it has found a message-specific retry record, was not finding
2173 messages that were in split spool directories. Consequently, it was
2174 deleting retry records that should have stayed in existence.
2176 48. Steve fixed some bugs in eximstats.
2178 49. The SPA authentication driver was not abandoning authentication and moving
2179 on to the next authenticator when an expansion was forced to fail,
2180 contradicting the general specification for all authenticators. Instead it
2181 was generating a temporary error. It now behaves as specified.
2183 50. The default ordering of permitted cipher suites for GnuTLS was pessimal
2184 (the order specifies the preference for clients). The order is now AES256,
2185 AES128, 3DES, ARCFOUR128.
2187 51. Small patch to Sieve code - explicitly set From: when generating an
2190 52. Exim crashed if a remote delivery caused a very long error message to be
2191 recorded - for instance if somebody sent an entire SpamAssassin report back
2192 as a large number of 550 error lines. This bug was coincidentally fixed by
2193 increasing the size of one of Exim's internal buffers (big_buffer) that
2194 happened as part of the Exiscan merge. However, to be on the safe side, I
2195 have made the code more robust (and fixed the comments that describe what
2198 53. Now that there can be additional text after "Completed" in log lines (if
2199 the queue_time_overall log selector is set), a one-byte patch to exigrep
2200 was needed to allow it to recognize "Completed" as not the last thing in
2203 54. The LDAP lookup was not handling a return of LDAP_RES_SEARCH_REFERENCE. A
2204 patch that reportedly fixes this has been added. I am not expert enough to
2205 create a test for it. This is what the patch creator wrote:
2207 "I found a little strange behaviour of ldap code when working with
2208 Windows 2003 AD Domain, where users was placed in more than one
2209 Organization Units. When I tried to give exim partial DN, the exit code
2210 of ldap_search was unknown to exim because of LDAP_RES_SEARCH_REFERENCE.
2211 But simultaneously result of request was absolutely normal ldap result,
2212 so I produce this patch..."
2214 Later: it seems that not all versions of LDAP support LDAP_RES_SEARCH_
2215 REFERENCE, so I have modified the code to exclude the patch when that macro
2218 55. Some experimental protocols are using DNS PTR records for new purposes. The
2219 keys for these records are domain names, not reversed IP addresses. The
2220 dnsdb PTR lookup now tests whether its key is an IP address. If not, it
2221 leaves it alone. Component reversal etc. now happens only for IP addresses.
2224 56. Improve error message when ldap_search() fails in OpenLDAP or Solaris LDAP.
2226 57. Double the size of the debug message buffer (to 2048) so that more of very
2227 long debug lines gets shown.
2229 58. The exicyclog utility now does better if the number of log files to keep
2230 exceeds 99. In this case, it numbers them 001, 002 ... instead of 01, 02...
2232 59. Two changes related to the smtp_active_hostname option:
2234 (1) $smtp_active_hostname is now available as a variable.
2235 (2) The default for smtp_banner uses $smtp_active_hostname instead
2236 of $primary_hostname.
2238 60. The host_aton() function is supposed to be passed a string that is known
2239 to be a valid IP address. However, in the case of IPv6 addresses, it was
2240 not checking this. This is a hostage to fortune. Exim now panics and dies
2241 if the condition is not met. A case was found where this could be provoked
2242 from a dnsdb PTR lookup with an IPv6 address that had more than 8
2243 components; fortuitously, this particular loophole had already been fixed
2244 by change 4.50/55 above.
2246 If there are any other similar loopholes, the new check in host_aton()
2247 itself should stop them being exploited. The report I received stated that
2248 data on the command line could provoke the exploit when Exim was running as
2249 exim, but did not say which command line option was involved. All I could
2250 find was the use of -be with a bad dnsdb PTR lookup, and in that case it is
2251 running as the user.
2254 61. There was a buffer overflow vulnerability in the SPA authentication code
2255 (which came originally from the Samba project). I have added a test to the
2256 spa_base64_to_bits() function which I hope fixes it.
2259 62. Configuration update for GNU/Hurd and variations. Updated Makefile-GNU and
2260 os.h-GNU, and added configuration files for GNUkFreeBSD and GNUkNetBSD.
2262 63. The daemon start-up calls getloadavg() while still root for those OS that
2263 need the first call to be done as root, but it missed one case: when
2264 deliver_queue_load_max is set with deliver_drop_privilege. This is
2265 necessary for the benefit of the queue runner, because there is no re-exec
2266 when deliver_drop_privilege is set.
2268 64. A call to exiwhat cut short delays set up by "delay" modifiers in ACLs.
2269 This has been fixed.
2271 65. Caching of lookup data for "hosts =" ACL conditions, when a named host list
2272 was in use, was not putting the data itself into the right store pool;
2273 consequently, it could be overwritten for a subsequent message in the same
2274 SMTP connection. (Fix 4.40/11 dealt with the non-cache case, but overlooked
2277 66. Added hosts_max_try_hardlimit to the smtp transport, default 50.
2279 67. The string_is_ip_address() function returns 0, 4, or 6, for "no an IP
2280 address", "IPv4 address", and "IPv6 address", respectively. Some calls of
2281 the function were treating the return as a boolean value, which happened to
2282 work because 0=false and not-0=true, but is not correct code.
2284 68. The host_aton() function was not handling scoped IPv6 addresses (those
2285 with, for example, "%eth0" on the end) correctly.
2287 69. Fixed some compiler warnings in acl.c for the bitmaps specified with
2288 negated items (that is, ~something) in unsigned ints. Some compilers
2289 apparently mutter when there is no cast.
2291 70. If an address verification called from an ACL failed, and did not produce a
2292 user-specific message (i.e. there was only a "system" message), nothing was
2293 put in $acl_verify_message. In this situation, it now puts the system
2296 71. Change 4.23/11 added synchronization checking at the start of an SMTP
2297 session; change 4.31/43 added the unwanted input to the log line - except
2298 that it did not do this in the start of session case. It now does.
2300 72. After a timeout in a callout SMTP session, Exim still sent a QUIT command.
2301 This is wrong and can cause the other end to generate a synchronization
2302 error if it is another Exim or anything else that does the synchronization
2303 check. A QUIT command is no longer sent after a timeout.
2305 73. $host_lookup_deferred has been added, to make it easier to detect DEFERs
2306 during host lookups.
2308 74. The defer_ok option of callout verification was not working if it was used
2309 when verifying addresses in header lines, that is, for this case:
2311 verify = header_sender/callout=defer_ok
2313 75. A backgrounded daemon closed stdin/stdout/stderr on entry; this meant that
2314 those file descriptors could be used for SMTP connections. If anything
2315 wrote to stderr (the example that came up was "warn" in embedded Perl), it
2316 could be sent to the SMTP client, causing chaos. The daemon now opens
2317 stdin, stdout, and stderr to /dev/null when it puts itself into the
2320 76. Arrange for output from Perl's "warn" command to be written to Exim's main
2321 log by default. The user can override this with suitable Perl magic.
2323 77. The use of log_message on a "discard" ACL verb, which is supposed to add to
2324 the log message when discard triggers, was not working for the DATA ACL or
2325 for the non-SMTP ACL.
2327 78. Error message wording change in sieve.c.
2329 79. If smtp_accept_max_per_host was set, the number of connections could be
2330 restricted to fewer than expected, because the daemon was trying to set up
2331 a new connection before checking whether the processes handling previous
2332 connections had finished. The check for completed processes is now done
2333 earlier. On busy systems, this bug wouldn't be noticed because something
2334 else would have woken the daemon, and it would have reaped the completed
2337 80. If a message was submitted locally by a user whose login name contained one
2338 or more spaces (ugh!), the spool file that Exim wrote was not re-readable.
2339 It caused a spool format error. I have fixed the spool reading code. A
2340 related problem was that the "from" clause in the Received: line became
2341 illegal because of the space(s). It is now covered by ${quote_local_part.
2343 81. Included the latest eximstats from Steve (adds average sizes to HTML Top
2346 82. Updated OS/Makefile-AIX as per message from Mike Meredith.
2348 83. Patch from Sieve maintainer to fix unterminated string problem in
2349 "vacation" handling.
2351 84. Some minor changes to the Linux configuration files to help with other
2352 OS variants using glibc.
2354 85. One more patch for Sieve to update vacation handling to latest spec.
2357 ----------------------------------------------------
2358 See the note above about the 4.44 and 4.50 releases.
2359 ----------------------------------------------------
2365 1. Change 4.43/35 introduced a bug that caused file counts to be
2366 incorrectly computed when quota_filecount was set in an appendfile
2369 2. Closing a stable door: arrange to panic-die if setitimer() ever fails. The
2370 bug fixed in 4.43/37 would have been diagnosed quickly if this had been in
2373 3. Give more explanation in the error message when the command for a transport
2374 filter fails to execute.
2376 4. There are several places where Exim runs a non-Exim command in a
2377 subprocess. The SIGUSR1 signal should be disabled for these processes. This
2378 was being done only for the command run by the queryprogram router. It is
2379 now done for all such subprocesses. The other cases are: ${run, transport
2380 filters, and the commands run by the lmtp and pipe transports.
2382 5. Some older OS have a limit of 256 on the maximum number of file
2383 descriptors. Exim was using setrlimit() to set 1000 as a large value
2384 unlikely to be exceeded. Change 4.43/17 caused a lot of logging on these
2385 systems. I've change it so that if it can't get 1000, it tries for 256.
2387 6. "control=submission" was allowed, but had no effect, in a DATA ACL. This
2388 was an oversight, and furthermore, ever since the addition of extra
2389 controls (e.g. 4.43/32), the checks on when to allow different forms of
2390 "control" were broken. There should now be diagnostics for all cases when a
2391 control that does not make sense is encountered.
2393 7. $recipients is now available in the predata ACL (oversight).
2395 8. Tidy the search cache before the fork to do a delivery from a message
2396 received from the command line. Otherwise the child will trigger a lookup
2397 failure and thereby defer the delivery if it tries to use (for example) a
2398 cached ldap connection that the parent has called unbind on.
2400 9. If verify=recipient was followed by verify=sender in a RCPT ACL, the value
2401 of $address_data from the recipient verification was clobbered by the
2402 sender verification.
2404 10. If FIXED_NEVER_USERS was defined, but empty, Exim was assuming the uid 0
2405 was its contents. (It was OK if the option was not defined at all.)
2407 11. A "Completed" log line is now written for messages that are removed from
2408 the spool by the -Mrm option.
2410 12. $host_address is now set to the target address during the checking of
2411 ignore_target_hosts.
2413 13. When checking ignore_target_hosts for an ipliteral router, no host name was
2414 being passed; this would have caused $sender_host_name to have been used if
2415 matching the list had actually called for a host name (not very likely,
2416 since this list is usually IP addresses). A host name is now passed as
2419 14. Changed the calls that set up the SIGCHLD handler in the daemon to use the
2420 code that specifies a non-restarting handler (typically sigaction() in
2421 modern systems) in an attempt to fix a rare and obscure crash bug.
2423 15. Narrowed the window for a race in the daemon that could cause it to ignore
2424 SIGCHLD signals. This is not a major problem, because they are used only to
2425 wake it up if nothing else does.
2427 16. A malformed maildirsize file could cause Exim to calculate negative values
2428 for the mailbox size or file count. Odd effects could occur as a result.
2429 The maildirsize information is now recalculated if the size or filecount
2432 17. Added HAVE_SYS_STATVFS_H to the os.h file for Linux, as it has had this
2433 support for a long time. Removed HAVE_SYS_VFS_H.
2435 18. Updated exipick to current release from John Jetmore.
2437 19. Allow an empty sender to be matched against a lookup in an address list.
2438 Previously the only cases considered were a regular expression, or an
2441 20. Exim went into a mad DNS lookup loop when doing a callout where the
2442 host was specified on the transport, if the DNS lookup yielded more than
2445 21. The RFC2047 encoding function was originally intended for short strings
2446 such as real names; it was not keeping to the 75-character limit for
2447 encoded words that the RFC imposes. It now respects the limit, and
2448 generates multiple encoded words if necessary. To be on the safe side, I
2449 have increased the buffer size for the ${rfc2047: expansion operator from
2452 22. Failure to deliver a bounce message always caused it to be frozen, even if
2453 there was an errors_to setting on the router. The errors_to setting is now
2456 23. If an IPv6 address is given for -bh or -bhc, it is now converted to the
2457 canonical form (fully expanded) before being placed in
2458 $sender_host_address.
2460 24. Updated eximstats to version 1.33
2462 25. Include certificate and key file names in error message when GnuTLS fails
2463 to set them up, because the GnuTLS error message doesn't include the name
2464 of the failing file when there is a problem reading it.
2466 26. Expand error message when OpenSSL has problems setting up cert/key files.
2469 27. Reset the locale to "C" after calling embedded Perl, in case it was changed
2470 (this can affect the format of dates).
2472 28. exim_tidydb, when checking for the continued existence of a message for
2473 which it has found a message-specific retry record, was not finding
2474 messages that were in split spool directories. Consequently, it was
2475 deleting retry records that should have stayed in existence.
2477 29. eximstats updated to version 1.35
2478 1.34 - allow eximstats to parse syslog lines as well as mainlog lines
2479 1.35 - bugfix such that pie charts by volume are generated correctly
2481 30. The SPA authentication driver was not abandoning authentication and moving
2482 on to the next authenticator when an expansion was forced to fail,
2483 contradicting the general specification for all authenticators. Instead it
2484 was generating a temporary error. It now behaves as specified.
2486 31. The default ordering of permitted cipher suites for GnuTLS was pessimal
2487 (the order specifies the preference for clients). The order is now AES256,
2488 AES128, 3DES, ARCFOUR128.
2490 31. Small patch to Sieve code - explicitly set From: when generating an
2493 32. Exim crashed if a remote delivery caused a very long error message to be
2494 recorded - for instance if somebody sent an entire SpamAssassin report back
2495 as a large number of 550 error lines. This bug was coincidentally fixed by
2496 increasing the size of one of Exim's internal buffers (big_buffer) that
2497 happened as part of the Exiscan merge. However, to be on the safe side, I
2498 have made the code more robust (and fixed the comments that describe what
2501 33. Some experimental protocols are using DNS PTR records for new purposes. The
2502 keys for these records are domain names, not reversed IP addresses. The
2503 dnsdb PTR lookup now tests whether its key is an IP address. If not, it
2504 leaves it alone. Component reversal etc. now happens only for IP addresses.
2507 34. The host_aton() function is supposed to be passed a string that is known
2508 to be a valid IP address. However, in the case of IPv6 addresses, it was
2509 not checking this. This is a hostage to fortune. Exim now panics and dies
2510 if the condition is not met. A case was found where this could be provoked
2511 from a dnsdb PTR lookup with an IPv6 address that had more than 8
2512 components; fortuitously, this particular loophole had already been fixed
2513 by change 4.50/55 or 4.44/33 above.
2515 If there are any other similar loopholes, the new check in host_aton()
2516 itself should stop them being exploited. The report I received stated that
2517 data on the command line could provoke the exploit when Exim was running as
2518 exim, but did not say which command line option was involved. All I could
2519 find was the use of -be with a bad dnsdb PTR lookup, and in that case it is
2520 running as the user.
2523 35. There was a buffer overflow vulnerability in the SPA authentication code
2524 (which came originally from the Samba project). I have added a test to the
2525 spa_base64_to_bits() function which I hope fixes it.
2528 36. The daemon start-up calls getloadavg() while still root for those OS that
2529 need the first call to be done as root, but it missed one case: when
2530 deliver_queue_load_max is set with deliver_drop_privilege. This is
2531 necessary for the benefit of the queue runner, because there is no re-exec
2532 when deliver_drop_privilege is set.
2534 37. Caching of lookup data for "hosts =" ACL conditions, when a named host list
2535 was in use, was not putting the data itself into the right store pool;
2536 consequently, it could be overwritten for a subsequent message in the same
2537 SMTP connection. (Fix 4.40/11 dealt with the non-cache case, but overlooked
2540 38. Sometimes the final signoff response after QUIT could fail to get
2541 transmitted in the non-TLS case. Testing !tls_active instead of tls_active
2542 < 0 before doing a fflush(). This bug looks as though it goes back to the
2543 introduction of TLS in release 3.20, but "sometimes" must have been rare
2544 because the tests only now provoked it.
2550 1. Fixed a longstanding but relatively impotent bug: a long time ago, before
2551 PIPELINING, the function smtp_write_command() used to return TRUE or FALSE.
2552 Now it returns an integer. A number of calls were still expecting a T/F
2553 return. Fortuitously, in all cases, the tests worked in OK situations,
2554 which is the norm. However, things would have gone wrong on any write
2555 failures on the smtp file descriptor. This function is used when sending
2556 messages over SMTP and also when doing verify callouts.
2558 2. When Exim is called to do synchronous delivery of a locally submitted
2559 message (the -odf or -odi options), it no longer closes stderr before doing
2562 3. Implemented the mua_wrapper option.
2564 4. Implemented mx_fail_domains and srv_fail_domains for the dnslookup router.
2566 5. Implemented the functions header_remove(), header_testname(),
2567 header_add_at_position(), and receive_remove_recipient(), and exported them
2570 6. If an ACL "warn" statement specified the addition of headers, Exim already
2571 inserted X-ACL-Warn: at the start if there was no header name. However, it
2572 was not making this test for the second and subsequent header lines if
2573 there were newlines in the string. This meant that an invalid header could
2574 be inserted if Exim was badly configured.
2576 7. Allow an ACL "warn" statement to add header lines at the start or after all
2577 the Received: headers, as well as at the end.
2579 8. Added the rcpt_4xx retry error code.
2581 9. Added postmaster_mailfrom=xxx to callout verification option.
2583 10. Added mailfrom=xxxx to the callout verification option, for verify=
2586 11. ${substr_1_:xxxx} and ${substr__3:xxxx} are now diagnosed as syntax errors
2587 (they previously behaved as ${substr_1_0:xxxx} and ${substr:_0_3:xxxx}).
2589 12. Inserted some casts to stop certain compilers warning when using pointer
2590 differences as field lengths or precisions in printf-type calls (mostly
2591 affecting debugging statements).
2593 13. Added optional readline() support for -be (dynamically loaded).
2595 14. Obscure bug fix: if a message error (e.g. 4xx to MAIL) happened within the
2596 same clock tick as a message's arrival, so that its received time was the
2597 same as the "first fail" time on the retry record, and that message
2598 remained on the queue past the ultimate address timeout, every queue runner
2599 would try a delivery (because it was past the ultimate address timeout) but
2600 after another failure, the ultimate address timeout, which should have then
2601 bounced the address, did not kick in. This was a "< instead of <=" error;
2602 in most cases the first failure would have been in the next clock tick
2603 after the received time, and all would be well.
2605 15. The special items beginning with @ in domain lists (e.g. @mx_any) were not
2606 being recognized when the domain list was tested by the match_domain
2607 condition in an expansion string.
2609 16. Added the ${str2b64: operator.
2611 17. Exim was always calling setrlimit() to set a large limit for the number of
2612 processes, without checking whether the existing limit was already
2613 adequate. (It did check for the limit on file descriptors.) Furthermore,
2614 errors from getrlimit() and setrlimit() were being ignored. Now they are
2615 logged to the main and panic logs, but Exim does carry on, to try to do its
2616 job under whatever limits there are.
2618 18. Imported PCRE 5.0.
2620 19. Trivial typo in log message " temporarily refused connection" (the leading
2623 20. If the log selector return_path_on_delivery was set and an address was
2624 redirected to /dev/null, the delivery process crashed because it assumed
2625 that a return path would always be set for a "successful" delivery. In this
2626 case, the whole delivery is bypassed as an optimization, and therefore no
2629 21. Internal re-arrangement: the function for sending a challenge and reading
2630 a response while authentication was assuming a zero-terminated challenge
2631 string. It's now changed to take a pointer and a length, to allow for
2632 binary data in such strings.
2634 22. Added the cyrus_sasl authenticator (code supplied by MBM).
2636 23. Exim was not respecting finduser_retries when seeking the login of the
2637 uid under which it was called; it was always trying 10 times. (The default
2638 setting of finduser_retries is zero.) Also, it was sleeping after the final
2639 failure, which is pointless.
2641 24. Implemented tls_on_connect_ports.
2643 25. Implemented acl_smtp_predata.
2645 26. If the domain in control=submission is set empty, Exim assumes that the
2646 authenticated id is a complete email address when it generates From: or
2647 Sender: header lines.
2649 27. Added "#define SOCKLEN_T int" to OS/os.h-SCO and OS/os.h-SCO_SV. Also added
2650 definitions to OS/Makefile-SCO and OS/Makefile-SCO_SV that put basename,
2651 chown and chgrp in /bin and hostname in /usr/bin.
2653 28. Exim was keeping the "process log" file open after each use, just as it
2654 does for the main log. This opens the possibility of it remaining open for
2655 long periods when the USR1 signal hits a daemon. Occasional processlog
2656 errors were reported, that could have been caused by this. Anyway, it seems
2657 much more sensible not to leave this file open at all, so that is what now
2660 29. The long-running daemon process does not normally write to the log once it
2661 has entered its main loop, and it closes the log before doing so. This is
2662 so that log files can straightforwardly be renamed and moved. However,
2663 there are a couple of unusual error situations where the daemon does write
2664 log entries, and I had neglected to close the log afterwards.
2666 30. The text of an SMTP error response that was received during a remote
2667 delivery was being truncated at 512 bytes. This is too short for some of
2668 the long messages that one sometimes sees. I've increased the limit to
2671 31. It is now possible to make retry rules that apply only when a message has a
2672 specific sender, in particular, an empty sender.
2674 32. Added "control = enforce_sync" and "control = no_enforce_sync". This makes
2675 it possible to be selective about when SMTP synchronization is enforced.
2677 33. Added "control = caseful_local_part" and "control = "caselower_local_part".
2679 32. Implemented hosts_connection_nolog.
2681 33. Added an ACL for QUIT.
2683 34. Setting "delay_warning=" to disable warnings was not working; it gave a
2686 35. Added mailbox_size and mailbox_filecount to appendfile.
2688 36. Added control = no_multiline_responses to ACLs.
2690 37. There was a bug in the logic of the code that waits for the clock to tick
2691 in the case where the clock went backwards by a substantial amount such
2692 that the microsecond fraction of "now" was more than the microsecond
2693 fraction of "then" (but the whole seconds number was less).
2695 38. Added support for the libradius Radius client library this is found on
2696 FreeBSD (previously only the radiusclient library was supported).
2702 1. When certain lookups returned multiple values in the form name=value, the
2703 quoting of the values was not always being done properly. Specifically:
2704 (a) If the value started with a double quote, but contained no whitespace,
2706 (b) If the value contained whitespace other than a space character (i.e.
2707 tabs or newlines or carriage returns) it was not quoted.
2708 This fix has been applied to the mysql and pgsql lookups by writing a
2709 separate quoting function and calling it from the lookup code. The fix
2710 should probably also be applied to nisplus, ibase and oracle lookups, but
2711 since I cannot test any of those, I have not disturbed their existing code.
2713 2. A hit in the callout cache for a specific address caused a log line with no
2714 reason for rejecting RCPT. Now it says "Previous (cached) callout
2715 verification failure".
2717 3. There was an off-by-one bug in the queryprogram router. An over-long
2718 return line was truncated at 256 instead of 255 characters, thereby
2719 overflowing its buffer with the terminating zero. As well as fixing this, I
2720 have increased the buffer size to 1024 (and made a note to document this).
2722 4. If an interrupt, such as the USR1 signal that is send by exiwhat, arrives
2723 when Exim is waiting for an SMTP response from a remote server, Exim
2724 restarts its select() call on the socket, thereby resetting its timeout.
2725 This is not a problem when such interrupts are rare. Somebody set up a cron
2726 job to run exiwhat every 2 minutes, which is less than the normal select()
2727 timeout (5 or 10 minutes). This meant that the select() timeout never
2728 kicked in because it was always reset. I have fixed this by comparing the
2729 time when an interrupt arrives with the time at the start of the first call
2730 to select(). If more time than the timeout has elapsed, the interrupt is
2731 treated as a timeout.
2733 5. Some internal re-factoring in preparation for the addition of Sieve
2734 extensions (by MH). In particular, the "personal" test is moved to a
2735 separate function, and given an option for scanning Cc: and Bcc: (which is
2736 not set for Exim filters).
2738 6. When Exim created an email address using the login of the caller as the
2739 local part (e.g. when creating a From: or Sender: header line), it was not
2740 quoting the local part when it contained special characters such as @.
2742 7. Installed new OpenBSD configuration files.
2744 8. Reworded some messages for syntax errors in "and" and "or" conditions to
2745 try to make them clearer.
2747 9. Callout options, other than the timeout value, were being ignored when
2748 verifying sender addresses in header lines. For example, when using
2750 verify = header_sender/callout=no_cache
2752 the cache was (incorrectly) being used.
2754 10. Added a missing instance of ${EXE} to the exim_install script; this affects
2755 only the Cygwin environment.
2757 11. When return_path_on_delivery was set as a log selector, if different remote
2758 addresses in the same message used different return paths and parallel
2759 remote delivery occurred, the wrong values would sometimes be logged.
2760 (Whenever a remote delivery process finished, the return path value from
2761 the most recently started remote delivery process was logged.)
2763 12. RFC 3848 specifies standard names for the "with" phrase in Received: header
2764 lines when AUTH and/or TLS are in use. This is the "received protocol"
2765 field. Exim used to use "asmtp" for authenticated SMTP, without any
2766 indication (in the protocol name) for TLS use. Now it follows the RFC and
2767 uses "esmtpa" if the connection is authenticated, "esmtps" if it is
2768 encrypted, and "esmtpsa" if it is both encrypted and authenticated. These
2769 names appear in log lines as well as in Received: header lines.
2771 13. Installed MH's patches for Sieve to add the "copy" and "vacation"
2772 extensions, and comparison tests, and to fix some bugs.
2774 14. Changes to the "personal" filter test:
2776 (1) The test was buggy in that it was just doing the equivalent of
2777 "contains" tests on header lines. For example, if a user's address was
2778 anne@some.where, the "personal" test would incorrectly be true for
2780 To: susanne@some.where
2782 This test is now done by extracting each address from the header in turn,
2783 and checking the entire address. Other tests that are part of "personal"
2784 are now done using regular expressions (for example, to check local parts
2785 of addresses in From: header lines).
2787 (2) The list of non-personal local parts in From: addresses has been
2788 extended to include "listserv", "majordomo", "*-request", and "owner-*",
2789 taken from the Sieve specification recommendations.
2791 (3) If the message contains any header line starting with "List-" it is
2792 treated as non-personal.
2794 (4) The test for "circular" in the Subject: header line has been removed
2795 because it now seems ill-conceived.
2797 15. Minor typos in src/EDITME comments corrected.
2799 16. Installed latest exipick from John Jetmore.
2801 17. If headers_add on a router specified a text string that was too long for
2802 string_sprintf() - that is, longer than 8192 bytes - Exim panicked. The use
2803 of string_sprintf() is now avoided.
2805 18. $message_body_size was not set (it was always zero) when running the DATA
2806 ACL and the local_scan() function.
2808 19. For the "mail" command in an Exim filter, no default was being set for
2809 the once_repeat time, causing a random time value to be used if "once" was
2810 specified. (If the value happened to be <= 0, no repeat happened.) The
2811 default is now 0s, meaning "never repeat". The "vacation" command was OK
2812 (its default is 7d). It's somewhat surprising nobody ever noticed this bug
2813 (I found it when inspecting the code).
2815 20. There is now an overall timeout for performing a callout verification. It
2816 defaults to 4 times the callout timeout, which applies to individual SMTP
2817 commands during the callout. The overall timeout applies when there is more
2818 than one host that can be tried. The timeout is checked before trying the
2819 next host. This prevents very long delays if there are a large number of
2820 hosts and all are timing out (e.g. when the network connections are timing
2821 out). The value of the overall timeout can be changed by specifying an
2822 additional sub-option for "callout", called "maxwait". For example:
2824 verify = sender/callout=5s,maxwait=20s
2826 21. Add O_APPEND to the open() call for maildirsize files (Exim already seeks
2827 to the end before writing, but this should make it even safer).
2829 22. Exim was forgetting that it had advertised PIPELINING for the second and
2830 subsequent messages on an SMTP connection. It was also not resetting its
2831 memory on STARTTLS and an internal HELO.
2833 23. When Exim logs an SMTP synchronization error within a session, it now
2834 records whether PIPELINING has been advertised or not.
2836 24. Added 3 instances of "(long int)" casts to time_t variables that were being
2837 formatted using %ld, because on OpenBSD (and perhaps others), time_t is int
2838 rather than long int.
2840 25. Installed the latest Cygwin configuration files from the Cygwin maintainer.
2842 26. Added the never_mail option to autoreply.
2848 1. A reorganization of the code in order to implement 4.40/8 caused a daemon
2849 crash if the getsockname() call failed; this can happen if a connection is
2850 closed very soon after it is established. The problem was simply in the
2851 order in which certain operations were done, causing Exim to try to write
2852 to the SMTP stream before it had set up the file descriptor. The bug has
2853 been fixed by making things happen in the correct order.
2859 1. If "drop" was used in a DATA ACL, the SMTP output buffer was not flushed
2860 before the connection was closed, thus losing the rejection response.
2862 2. Commented out the definition of SOCKLEN_T in os.h-SunOS5. It is needed for
2863 some early Solaris releases, but causes trouble in current releases where
2864 socklen_t is defined.
2866 3. When std{in,out,err} are closed, re-open them to /dev/null so that they
2869 4. Minor refactoring of os.c-Linux to avoid compiler warning when IPv6 is not
2872 5. Refactoring in expand.c to improve memory usage. Pre-allocate a block so
2873 that releasing the top of it at the end releases what was used for sub-
2874 expansions (unless the block got too big). However, discard this block if
2875 the first thing is a variable or header, so that we can use its block when
2876 it is dynamic (useful for very large $message_headers, for example).
2878 6. Lookups now cache *every* query, not just the most recent. A new, separate
2879 store pool is used for this. It can be recovered when all lookup caches are
2880 flushed. Lookups now release memory at the end of their result strings.
2881 This has involved some general refactoring of the lookup sources.
2883 7. Some code has been added to the store_xxx() functions to reduce the amount
2884 of flapping under certain conditions.
2886 8. log_incoming_interface used to affect only the <= reception log lines. Now
2887 it causes the local interface and port to be added to several more SMTP log
2888 lines, for example "SMTP connection from", and rejection lines.
2890 9. The Sieve author supplied some patches for the doc/README.SIEVE file.
2892 10. Added a conditional definition of _BSD_SOCKLEN_T to os.h-Darwin.
2894 11. If $host_data was set by virtue of a hosts lookup in an ACL, its value
2895 could be overwritten at the end of the current message (or the start of a
2896 new message if it was set in a HELO ACL). The value is now preserved for
2897 the duration of the SMTP connection.
2899 12. If a transport had a headers_rewrite setting, and a matching header line
2900 contained an unqualified address, that address was qualified, even if it
2901 did not match any rewriting rules. The underlying bug was that the values
2902 of the flags that permit the existence of unqualified sender and recipient
2903 addresses in header lines (set by {sender,recipient}_unqualified_hosts for
2904 non-local messages, and by -bnq for local messages) were not being
2905 preserved with the message after it was received.
2907 13. When Exim was logging an SMTP synchronization error, it could sometimes log
2908 "next input=" as part of the text comprising the host identity instead of
2909 the correct text. The code was using the same buffer for two different
2910 strings. However, depending on which order the printing function evaluated
2911 its arguments, the bug did not always show up. Under Linux, for example, my
2912 test suite worked just fine.
2914 14. Exigrep contained a use of Perl's "our" scoping after change 4.31/70. This
2915 doesn't work with some older versions of Perl. It has been changed to "my",
2916 which in any case is probably the better facility to use.
2918 15. A really picky compiler found some instances of statements for creating
2919 error messages that either had too many or two few arguments for the format
2922 16. The size of the buffer for calls to the DNS resolver has been increased
2923 from 1024 to 2048. A larger buffer is needed when performing PTR lookups
2924 for addresses that have a lot of PTR records. This alleviates a problem; it
2925 does not fully solve it.
2927 17. A dnsdb lookup for PTR records that receives more data than will fit in the
2928 buffer now truncates the list and logs the incident, which is the same
2929 action as happens when Exim is looking up a host name and its aliases.
2930 Previously in this situation something unpredictable would happen;
2931 sometimes it was "internal error: store_reset failed".
2933 18. If a server dropped the connection unexpectedly when an Exim client was
2934 using GnuTLS and trying to read a response, the client delivery process
2935 crashed while trying to generate an error log message.
2937 19. If a "warn" verb in an ACL added multiple headers to a message in a single
2938 string, for example:
2940 warn message = H1: something\nH2: something
2942 the text was added as a single header line from Exim's point of view
2943 though it ended up OK in the delivered message. However, searching for the
2944 second and subsequent header lines using $h_h2: did not work. This has been
2945 fixed. Similarly, if a system filter added multiple headers in this way,
2946 the routers could not see them.
2948 20. Expanded the error message when iplsearch is called with an invalid key to
2949 suggest using net-iplsearch in a host list.
2951 21. When running tests using -bh, any delays imposed by "delay" modifiers in
2952 ACLs are no longer actually imposed (and a message to that effect is
2955 22. If a "gecos" field in a passwd entry contained escaped characters, in
2956 particular, if it contained a \" sequence, Exim got it wrong when building
2957 a From: or a Sender: header from that name. A second bug also caused
2958 incorrect handling when an unquoted " was present following a character
2959 that needed quoting.
2961 23. "{crypt}" as a password encryption mechanism for a "crypteq" expansion item
2962 was not being matched caselessly.
2964 24. Arranged for all hyphens in the exim.8 source to be escaped with
2967 25. Change 16 of 4.32, which reversed 71 or 4.31 didn't quite do the job
2968 properly. Recipient callout cache records were still being keyed to include
2969 the sender, even when use_sender was set false. This led to far more
2970 callouts that were necessary. The sender is no longer included in the key
2971 when use_sender is false.
2973 26. Added "control = submission" modifier to ACLs.
2975 27. Added the ${base62d: operator to decode base 62 numbers.
2977 28. dnsdb lookups can now access SRV records.
2979 29. CONFIGURE_OWNER can be set at build time to define an alternative owner for
2980 the configuration file.
2982 30. The debug message "delivering xxxxxx-xxxxxx-xx" is now output in verbose
2983 (-v) mode. This makes the output for a verbose queue run more intelligible.
2985 31. Added a use_postmaster feature to recipient callouts.
2987 32. Added the $body_zerocount variable, containing the number of binary zero
2988 bytes in the message body.
2990 33. The time of last modification of the "new" subdirectory is now used as the
2991 "mailbox time last read" when there is a quota error for a maildir
2994 34. Added string comparison operators lt, lti, le, lei, gt, gti, ge, gei.
2996 35. Added +ignore_unknown as a special item in host lists.
2998 36. Code for decoding IPv6 addresses in host lists is now included, even if
2999 IPv6 support is not being compiled. This fixes a bug in which an IPv6
3000 address was recognized as an IP address, but was then not correctly decoded
3001 into binary, causing unexpected and incorrect effects when compared with
3008 1. Very minor rewording of debugging text in manualroute to say "list of
3009 hosts" instead of "hostlist".
3011 2. If verify=header_syntax was set, and a header line with an unqualified
3012 address (no domain) and a large number of spaces between the end of the
3013 name and the colon was received, the reception process suffered a buffer
3014 overflow, and (when I tested it) crashed. This was caused by some obsolete
3015 code that should have been removed. The fix is to remove it!
3017 3. When running in the test harness, delay a bit after writing a bounce
3018 message to get a bit more predictability in the log output.
3020 4. Added a call to search_tidyup() just before forking a reception process. In
3021 theory, someone could use a lookup in the expansion of smtp_accept_max_
3022 per_host which, without the tidyup, could leave open a database connection.
3024 5. Added the variables $recipient_data and $sender_data which get set from a
3025 lookup success in an ACL "recipients" or "senders" condition, or a router
3026 "senders" option, similar to $domain_data and $local_part_data.
3028 6. Moved the writing of debug_print from before to after the "senders" test
3031 7. Change 4.31/66 (moving the time when the Received: is generated) caused
3032 problems for message scanning, either using a data ACL, or using
3033 local_scan() because the Received: header was not generated till after they
3034 were called (in order to set the time as the time of reception completion).
3035 I have revised the way this works. The header is now generated after the
3036 body is received, but before the ACL or local_scan() are called. After they
3037 are run, the timestamp in the header is updated.
3043 1. Change 4.24/6 introduced a bug because the SIGALRM handler was disabled
3044 before starting a queue runner without re-exec. This happened only when
3045 deliver_drop_privilege was set or when the Exim user was set to root. The
3046 effect of the bug was that timeouts during subsequent deliveries caused
3047 crashes instead of being properly handled. The handler is now left at its
3048 default (and expected) setting.
3050 2. The other case in which a daemon avoids a re-exec is to deliver an incoming
3051 message, again when deliver_drop_privilege is set or Exim is run as root.
3052 The bug described in (1) was not present in this case, but the tidying up
3053 of the other signals was missing. I have made the two cases consistent.
3055 3. The ignore_target_hosts setting on a manualroute router was being ignored
3056 for hosts that were looked up using the /MX notation.
3058 4. Added /ignore=<ip list> feature to @mx_any, @mx_primary, and @mx_secondary
3061 5. Change 4.31/55 was buggy, and broke when there was a rewriting rule that
3062 operated on the sender address. After changing the $sender_address to <>
3063 for the sender address verify, Exim was re-instated it as the original
3064 (before rewriting) address, but remembering that it had rewritten it, so it
3065 wasn't rewriting it again. This bug also had the effect of breaking the
3066 sender address verification caching when the sender address was rewritten.
3068 6. The ignore_target_hosts option was being ignored by the ipliteral router.
3069 This has been changed so that if the ip literal address matches
3070 ignore_target_hosts, the router declines.
3072 7. Added expansion conditions match_domain, match_address, and match_local_
3073 part (NOT match_host).
3075 8. The placeholder for the Received: header didn't have a length field set.
3077 9. Added code to Exim itself and to exim_lock to test for a specific race
3078 condition that could lead to file corruption when using MBX delivery. The
3079 issue is with the lockfile that is created in /tmp. If this file is removed
3080 after a process has opened it but before that process has acquired a lock,
3081 there is the potential for a second process to recreate the file and also
3082 acquire a lock. This could lead to two Exim processes writing to the file
3083 at the same time. The added code performs the same test as UW imapd; it
3084 checks after acquiring the lock that its file descriptor still refers to
3085 the same named file.
3087 10. The buffer for building added header lines was of fixed size, 8192 bytes.
3088 It is now parameterized by HEADER_ADD_BUFFER_SIZE and this can be adjusted
3091 11. Added the smtp_active_hostname option. If used, this will typically be made
3092 to depend on the incoming interface address. Because $interface_address is
3093 not set up until the daemon has forked a reception process, error responses
3094 that can happen earlier (such as "too many connections") no longer contain
3097 12. If an expansion in a condition on a "warn" statement fails because a lookup
3098 defers, the "warn" statement is abandoned, and the next ACL statement is
3099 processed. Previously this caused the whole ACL to be aborted.
3101 13. Added the iplsearch lookup type.
3103 14. Added ident_timeout as a log selector.
3105 15. Added tls_certificate_verified as a log selector.
3107 16. Added a global option tls_require_ciphers (compare the smtp transport
3108 option of the same name). This controls incoming TLS connections.
3110 17. I finally figured out how to make tls_require_ciphers do a similar thing
3111 in GNUtls to what it does in OpenSSL, that is, set up an appropriate list
3112 before starting the TLS session.
3114 18. Tabs are now shown as \t in -bP output.
3116 19. If the log selector return_path_on_delivery was set, Exim crashed when
3117 bouncing a message because it had too many Received: header lines.
3119 20. If two routers both had headers_remove settings, and the first one included
3120 a superfluous trailing colon, the final name in the first list and the
3121 first name in the second list were incorrectly joined into one item (with a
3122 colon in the middle).
3128 1. Added -C and -D options to the exinext utility, mainly to make it easier
3129 to include in the automated testing, but these could be helpful when
3130 multiple configurations are in use.
3132 2. The exinext utility was not formatting the output nicely when there was
3133 an alternate port involved in the retry record key, nor when there was a
3134 message id as well (for retries that were specific to a specific message
3135 and a specific host). It was also confused by IPv6 addresses, because of
3136 the additional colons they contain. I have fixed the IPv4 problem, and
3137 patched it up to do a reasonable job for IPv6.
3139 3. When there is an error after a MAIL, RCPT, or DATA SMTP command during
3140 delivery, the log line now contains "pipelined" if PIPELINING was used.
3142 4. An SMTP transport process used to panic and die if the bind() call to set
3143 an explicit outgoing interface failed. This has been changed; it is now
3144 treated in the same way as a connect() failure.
3146 5. A reference to $sender_host_name in the part of a conditional expansion
3147 that was being skipped was still causing a DNS lookup. This no longer
3150 6. The def: expansion condition was not recognizing references to header lines
3151 that used bh_ and bheader_.
3153 7. Added the _cache feature to named lists.
3155 8. The code for checking quota_filecount in the appendfile transport was
3156 allowing one more file than it should have been.
3158 9. For compatibility with Sendmail, the command line option
3166 and sets the incoming protocol and host name (for trusted callers). The
3167 host name and its colon can be omitted when only the protocol is to be set.
3168 Note the Exim already has two private options, -pd and -ps, that refer to
3169 embedded Perl. It is therefore impossible to set a protocol value of "d" or
3170 "s", but I don't think that's a major issue.
3172 10. A number of refactoring changes to the code, none of which should affect
3175 (a) The number of logging options was getting close to filling up the
3176 32-bit word that was used as a bit map. I have split them into two classes:
3177 those that are passed in the argument to log_write(), and those that are
3178 only ever tested independently outside of that function. These are now in
3179 separate 32-bit words, so there is plenty of room for expansion again.
3180 There is no change in the user interface or the logging behaviour.
3182 (b) When building, for example, log lines, the code previously used a
3183 macro that called string_cat() twice, in order to add two strings. This is
3184 not really sufficiently general. Furthermore, there was one instance where
3185 it was actually wrong because one of the argument was used twice, and in
3186 one call a function was used. (As it happened, calling the function twice
3187 did not affect the overall behaviour.) The macro has been replaced by a
3188 function that can join an arbitrary number of extra strings onto a growing
3191 (c) The code for expansion conditions now uses a table and a binary chop
3192 instead of a serial search (which was left over from when there were very
3193 few conditions). Also, it now recognizes conditions like "pam" even when
3194 the relevant support is not compiled in: a suitably worded error message is
3195 given if an attempt is made to use such a condition.
3197 11. Added ${time_interval:xxxxx}.
3199 12. A bug was causing one of the ddress fields not to be passed back correctly
3200 from remote delivery subprocesses. The field in question was not being
3201 subsequently used, so this caused to problems in practice.
3203 13. Added new log selectors queue_time and deliver_time.
3205 14. Might have fixed a bug in maildirsizefile handling that threw up
3206 "unexpected character" debug warnings, and recalculated the data
3207 unnecessarily. In any case, I expanded the warning message to give more
3210 15. Added the message "Restricted characters in address" to the statements in
3211 the default ACL that block characters like @ and % in local parts.
3213 16. Change 71 for release 4.31 proved to be much less benign that I imagined.
3214 Three changes have been made:
3216 (a) There was a serious bug; a negative response to MAIL caused the whole
3217 recipient domain to be cached as invalid, thereby blocking all messages
3218 to all local parts at the same domain, from all senders. This bug has
3219 been fixed. The domain is no longer cached after a negative response to
3220 MAIL if the sender used is not empty.
3222 (b) The default behaviour of using MAIL FROM:<> for recipient callouts has
3225 (c) A new callout option, "use_sender" has been added for people who want
3226 the modified behaviour.
3232 1. Removed "EXTRALIBS=-lwrap" from OS/Makefile-Unixware7 on the advice of
3235 2. Removed "LIBS = -lresolv" from OS/Makefile-Darwin as it is not needed, and
3236 indeed breaks things for older releases.
3238 3. Added additional logging to the case where there is a problem reading data
3239 from a filter that is running in a subprocess using a pipe, in order to
3240 try to track down a specific problem.
3242 4. Testing facility fudge: when running in the test harness and attempting
3243 to connect to 10.x.x.x (expecting a connection timeout) I'm now sometimes
3244 getting "No route to host". Convert this to a timeout.
3246 5. Define ICONV_ARG2_TYPE as "char **" for Unixware7 to avoid compiler
3249 6. Some OS don't have socklen_t but use size_t instead. This affects the
3250 fifth argument of getsockopt() amongst other things. This is now
3251 configurable by a macro called SOCKLEN_T which defaults to socklen_t, but
3252 can be set for individual OS. I have set it for SunOS5, OSF1, and
3253 Unixware7. Current versions of SunOS5 (aka Solaris) do have socklen_t, but
3254 some earlier ones do not.
3256 7. Change 4.30/15 was not doing the test caselessly.
3258 8. The standard form for an IPv6 address literal was being rejected by address
3259 parsing in, for example, MAIL and RCPT commands. An example of this kind of
3260 address is [IPv6:2002:c1ed:8229:10:202:2dff:fe07:a42a]. Exim now accepts
3261 this, as well as the form without the "IPv6" on the front (but only when
3262 address literals are enabled, of course).
3264 9. Added some casts to avoid compiler warnings in OS/os.c-Linux.
3266 10. Exim crashed if a message with an empty sender address specified by -f
3267 encountered a router with an errors_to setting. This could be provoked only
3268 by a command such as
3272 where an empty string was supplied; "<>" did not hit this bug.
3274 11. Installed PCRE release 4.5.
3276 12. If EHLO/HELO was rejected by an ACL, the value of $sender_helo_name
3277 remained set. It is now erased.
3279 13. exiqgrep wasn't working on MacOS X because it didn't correctly compute
3280 times from message ids (which are base 36 rather than the normal 62).
3282 14. "Expected" SMTP protocol errors that can arise when PIPELINING is in use
3283 were being counted as actual protocol errors, and logged if the log
3284 selector +smtp_protocol_error was set. One cannot be perfect in this test,
3285 but now, if PIPELINING has been advertised, RCPT following a rejected MAIL,
3286 and DATA following a set of rejected RCPTs do not count as protocol errors.
3287 In other words, Exim assumes they were pipelined, though this may not
3288 actually be the case. Of course, in all cases the client gets an
3289 appropriate error code.
3291 15. If a lookup fails in an ACL condition, a message about the failure may
3292 be available; it is used if testing the ACL cannot continue, because most
3293 such messages specify what the cause of the deferral is. However, some
3294 messages (e.g. "MYSQL: no data found") do not cause a defer. There was bug
3295 that caused an old message to be retained and used if a later statement
3296 caused a defer, replacing the real cause of the deferral.
3298 16. If an IP address had so many PTR records that the DNS lookup buffer
3299 was not large enough to hold them, Exim could crash while trying to process
3300 the truncated data. It now detects and logs this case.
3302 17. Further to 4.21/58, another change has been made: if (and only if) the
3303 first line of a message (the first header line) ends with CRLF, a bare LF
3304 in a subsequent header line has a space inserted after it, so as not to
3305 terminate the header.
3307 18. Refactoring: tidied an ugly bit of code in appendfile that copied data
3308 unnecessarily, used atoi() instead of strtol(), and didn't check the
3309 termination when getting file sizes from file names by regex.
3311 19. Completely re-implemented the support for maildirsize files, in the light
3312 of a number of problems with the previous contributed implementation
3313 (4.30/29). In particular:
3315 . If the quota is zero, the maildirsize file is maintained, but no quota is
3318 . If the maildir directory does not exist, it is created before any attempt
3319 to write a maildirsize file.
3321 . The quota value in the file is just a cache; if the quota is changed in
3322 the transport, the new value overrides.
3324 . A regular expression is available for excluding directories from the
3327 20. The autoreply transport checks the characters in options that define the
3328 message's headers; it allows continued headers, but it was checking with
3329 isspace() after an embedded newline instead of explicitly looking for a
3332 21. If all the "regular" hosts to which an address was routed had passed their
3333 expiry times, and had not reached their retry times, the address was
3334 bounced, even if fallback hosts were defined. Now Exim should go on to try
3337 22. Increased buffer sizes in the callout code from 1024 to 4096 to match the
3338 equivalent code in the SMTP transport. Some hosts send humungous responses
3339 to HELO/EHLO, more than 1024 it seems.
3341 23. Refactoring: code in filter.c used (void *) for "any old type" but this
3342 gives compiler warnings in some environments. I've now done it "properly",
3345 24. The replacement for inet_ntoa() that is used with gcc on IRIX systems
3346 (because of problems with the built-in one) was declared to return uschar *
3347 instead of char *, causing compiler failure.
3349 25. Fixed a file descriptor leak when processing alias/forward files.
3351 26. Fixed a minor format string issue in dbfn.c.
3353 27. Typo in exim.c: ("dmbnz" for "dbmnz").
3355 28. If a filter file refered to $h_xxx or $message_headers, and the headers
3356 contained RFC 2047 "words", Exim's memory could, under certain conditions,
3359 29. When a sender address is verified, it is cached, to save repeating the test
3360 when there is more than one recipient in a message. However, when the
3361 verification involves a callout, it is possible for different callout
3362 options to be set for different recipients. It is too complicated to keep
3363 track of this in the cache, so now Exim always runs a verification when a
3364 callout is required, relying on the callout cache for the optimization.
3365 The overhead is duplication of the address routing, but this should not be
3368 30. Fixed a bug in callout caching. If a RCPT command caused the sender address
3369 to be verified with callout=postmaster, and the main callout worked but the
3370 postmaster check failed, the verification correctly failed. However, if a
3371 subsequent RCPT command asked for sender verification *without* the
3372 postmaster check, incorrect caching caused this verification also to fail,
3375 31. Exim caches DNS lookup failures so as to avoid multiple timeouts; however,
3376 it was not caching the DNS options (qualify_single, search_parents) that
3377 were used when the lookup failed. A subsequent lookup with different
3378 options therefore always gave the same answer, though there were cases
3379 where it should not have. (Example: a "domains = !$mx_any" option on a
3380 dnslookup router: the "domains" option is always processed without any
3381 widening, but the router might have qualify_single set.) Now Exim uses the
3382 cached value only when the same options are set.
3384 32. Added John Jetmore's "exipick" utility to the distribution.
3386 33. GnuTLS: When an attempt to start a TLS session fails for any reason other
3387 than a timeout (e.g. a certificate is required, and is not provided), an
3388 Exim server now closes the connection immediately. Previously it waited for
3389 the client to close - but if the client is SSL, it seems that they each
3390 wait for each other, leading to a delay before one of them times out.
3392 34: GnuTLS: Updated the code to use the new GnuTLS 1.0.0 API. I have not
3393 maintained 0.8.x compatibility because I don't think many are using it, and
3394 it is clearly obsolete.
3396 35. Added TLS support for CRLs: a tls_crl global option and one for the smtp
3399 36. OpenSSL: $tls_certificate_verified was being set to 1 even if the
3400 client certificate was expired. A simple patch fixes this, though I don't
3401 understand the full logic of why the verify callback is called multiple
3404 37. OpenSSL: a patch from Robert Roselius: "Enable client-bug workaround.
3405 Versions of OpenSSL as of 0.9.6d include a 'CBC countermeasure' feature,
3406 which causes problems with some clients (such as the Certicom SSL Plus
3407 library used by Eudora). This option, SSL_OP_DONT_INSERT_EMPTY_FRAGMENTS,
3408 disables the coutermeasure allowing Eudora to connect."
3410 38. Exim was not checking that a write() to a log file succeeded. This could
3411 lead to Bad Things if a log got too big, in particular if it hit a file
3412 size limit. Exim now panics and dies if it cannot write to a log file, just
3413 as it does if it cannot open a log file.
3415 39. Modified OS/Makefile-Linux so that it now contains
3417 CFLAGS=-O -D_FILE_OFFSET_BITS=64 -D_LARGEFILE_SOURCE
3419 The two -D definitions ensure that Exim is compiled with large file
3420 support, which makes it possible to handle log files that are bigger than
3423 40. Fixed a subtle caching bug: if (in an ACL or a set of routers, for
3424 instance) a domain was checked against a named list that involved a lookup,
3425 causing $domain_data to be set, then another domain was checked against the
3426 same list, then the first domain was re-checked, the value of $domain_data
3427 after the final check could be wrong. In particular, if the second check
3428 failed, it could be set empty. This bug probably also applied to
3431 41. The strip_trailing_dot option was not being applied to the address given
3432 with the -f command-line option.
3434 42. The code for reading a message's header from the spool was incrementing
3435 $received_count, but never initializing it. This meant that the value was
3436 incorrect (doubled) while delivering a message in the same process in which
3437 it was received. In the most common configuration of Exim, this never
3438 happens - a fresh exec is done - but it can happen when
3439 deliver_drop_privilege is set.
3441 43. When Exim logs an SMTP synchronization error - client data sent too soon -
3442 it now includes up to 150 characters of the unexpected data in the log
3445 44. The exim_dbmbuild utility uses fixed size buffers for reading input lines
3446 and building data strings. The size of both of these buffers was 10 000
3447 bytes - far larger than anybody would *ever* want, thought I. Needless to
3448 say, somebody hit the limit. I have increased the maximum line length to
3449 20 000 and the maximum data length of concatenated lines to 100 000. I have
3450 also fixed two bugs, because there was no checking on these buffers. Tsk,
3451 tsk. Now exim_dbmbuild gives a message and exits with an error code if a
3452 buffer is too small.
3454 45. The exim_dbmbuild utility did not support quoted keys, as Exim does in
3455 lsearch lookups. Now it does.
3457 46. When parsing a route_list item in a manualroute router, a fixed-length
3458 buffer was used for the list of hosts. I made this 1024 bytes long,
3459 thinking that nobody would ever have a list of hosts that long. Wrong.
3460 Somebody had a whole pile of complicated expansion conditions, and the
3461 string was silently truncated, leading to an expansion error. It turns out
3462 that it is easier to change to an unlimited length (owing to other changes
3463 that have happened since this code was originally written) than to build
3464 structure for giving a limitation error. The length of the item that
3465 expands into the list of hosts is now unlimited.
3467 47. The lsearch lookup could not handle data where the length of text line was
3468 more than 4095 characters. Such lines were truncated, leading to shortened
3469 data being returned. It should now handle lines of any length.
3471 48. Minor wording revision: "cannot test xxx in yyy ACL" becomes "cannot test
3472 xxx condition in yyy ACL" (e.g. "cannot test domains condition in DATA
3475 49. Cosmetic tidy to scripts like exicyclog that are generated by globally
3476 replacing strings such as BIN_DIRECTORY in a source file: the replacement
3477 no longer happens in comment lines. A list of replacements is now placed
3478 at the head of all of the source files, except those whose only change is
3479 to replace PERL_COMMAND in the very first #! line.
3481 50. Replaced the slow insertion sort in queue.c, for sorting the list of
3482 messages on the queue, with a bottom-up merge sort, using code contributed
3483 by Michael Haardt. This should make operations like -bp somewhat faster on
3484 large queues. It won't affect queue runners, except when queue_run_in_order
3487 51. Installed eximstats 1.31 in the distribution.
3489 52. Added support for SRV lookups to the dnslookup router.
3491 53. If an ACL referred to $message_body or $message_body_end, the value was not
3492 reset for any messages that followed in the same SMTP session.
3494 54. The store-handling optimization for building very long strings was not
3495 differentiating between the different store pools. I don't think this
3496 actually made any difference in practice, but I've tidied it.
3498 55. While running the routers to verify a sender address, $sender_address
3499 was still set to the sender address. This is wrong, because when routing to
3500 send a bounce to the sender, it would be empty. Therefore, I have changed
3501 it so that, while verifying a sender address, $sender_address is set to <>.
3502 (There is no change to what happens when verifying a recipient address.)
3504 56. After finding MX (or SRV) records, Exim was doing a DNS lookup for the
3505 target A or AAAA records (if not already returned) without resetting the
3506 qualify_single or search_parents options of the DNS resolver. These are
3507 inappropriate in this case because the targets of MX and SRV records must
3508 be FQDNs. A broken DNS record could cause trouble if it happened to have a
3509 target that, when qualified, matched something in the local domain. These
3510 two options are now turned off when doing these lookups.
3512 57. It seems that at least some releases of Reiserfs (which does not have the
3513 concept of a fixed number of inodes) returns zero and not -1 for the
3514 number of available inodes. This interacted badly with check_spool_inodes,
3515 which assumed that -1 was the "no such thing" setting. What I have done is
3516 to check that the total number of inodes is greater than zero before doing
3517 the test of how many are available.
3519 58. When a "warn" ACL statement has a log_message modifier, the message is
3520 remembered, and not repeated. This is to avoid a lot of repetition when a
3521 message has many recipients that cause the same warning to be written.
3522 Howewer, Exim was preserving the list of already written lines for an
3523 entire SMTP session, which doesn't seem right. The memory is now reset if a
3524 new message is started.
3526 59. The "rewrite" debugging flag was not showing the result of rewriting in the
3527 debugging output unless log_rewrite was also set.
3529 60. Avoid a compiler warning on 64-bit systems in dsearch.c by avoiding the use
3530 of (int)(handle) when we know that handle contains (void *)(-1).
3532 61. The Exim daemon panic-logs an error return when it closes the incoming
3533 connection. However "connection reset by peer" seems to be common, and
3534 isn't really an error worthy of noting specially, so that particular error
3537 62. When Exim is trying to find all the local interfaces, it used to panic and
3538 die if the ioctl to get the interface flags failed. However, it seems that
3539 on at least one OS (Solaris 9) it is possible to have an interface that is
3540 included in the list of interfaces, but for which you get a failure error
3541 for this call. This happens when the interface is not "plumbed" into a
3542 protocol (i.e. neither IPv4 nor IPv6). I've changed the code so that a
3543 failure of the "get flags" call assumes that the interface is down.
3545 63. Added a ${eval10: operator, which assumes all numbers are decimal. This
3546 makes life easier for people who are doing arithmetic on fields extracted
3547 from dates, where you often get leading zeros that should not be
3548 interpreted as octal.
3550 64. Added qualify_domain to the redirect router, to override the global
3553 65. If a pathologically long header line contained very many addresses (the
3554 report of this problem mentioned 10 000) and each of them was rewritten,
3555 Exim could use up a very large amount of memory. (It kept on making new
3556 copies of the header line as it rewrote, and never released the old ones.)
3557 At the expense of a bit more processing, the header rewriting function has
3558 been changed so that it no longer eats memory in this way.
3560 66. The generation of the Received: header has been moved from the time that a
3561 message starts to be received, to the time that it finishes. The timestamp
3562 in the Received: header should now be very close to that of the <= log
3563 line. There are two side-effects of this change:
3565 (a) If a message is rejected by a DATA or non-SMTP ACL or local_scan(), the
3566 logged header lines no longer include the local Received: line, because
3567 it has not yet been created. The same applies to a copy of the message
3568 that is returned to a non-SMTP sender when a message is rejected.
3570 (b) When a filter file is tested using -bf, no additional Received: header
3571 is added to the test message. After some thought, I decided that this
3574 This change does not affect the value of $received_for. It is still set
3575 after address rewriting, but before local_scan() is called.
3577 67. Installed the latest Cygwin-specific files from the Cygwin maintainer.
3579 68. GnuTLS: If an empty file is specified for tls_verify_certificates, GnuTLS
3580 gave an unhelpful panic error message, and a defer error. I have managed to
3581 change this behaviour so that it now rejects any supplied certificate,
3582 which seems right, as the list of acceptable certificates is empty.
3584 69. OpenSSL: If an empty file is specified for tls_verify_certificates, OpenSSL
3585 gave an unhelpful defer error. I have not managed to make this reject any
3586 supplied certificates, but the error message it gives is "no certificate
3587 supplied", which is not helpful.
3589 70. exigrep's output now also includes lines that are not associated with any
3590 message, but which match the given pattern. Implemented by a patch from
3591 Martin Sluka, which also tidied up the Perl a bit.
3593 71. Recipient callout verification, like sender verification, was using <> in
3594 the MAIL FROM command. This isn't really the right thing, since the actual
3595 sender may affect whether the remote host accepts the recipient or not. I
3596 have changed it to use the actual sender in the callout; this means that
3597 the cache record is now keyed on a recipient/sender pair, not just the
3598 recipient address. There doesn't seem to be a real danger of callout loops,
3599 since a callout by the remote host to check the sender would use <>.
3600 [SEE ABOVE: changed after hitting problems.]
3602 72. Exim treats illegal SMTP error codes that do not begin with 4 or 5 as
3603 temporary errors. However, in the case of such a code being given after
3604 the end of a data transmission (i.e. after ".") Exim was failing to write
3605 a retry record for the message. (Yes, there was some broken host that was
3606 actually sending 8xx at this point.)
3608 73. An unknown lookup type in a host list could cause Exim to panic-die when
3609 the list was checked. (An example that provoked this was putting <; in the
3610 middle of a list instead of at the start.) If this happened during a DATA
3611 ACL check, a -D file could be left lying around. This kind of configuration
3612 error no longer causes Exim to die; instead it causes a defer errror. The
3613 incident is still logged to the main and panic logs.
3615 74. Buglet left over from Exim 3 conversion. The message "too many messages
3616 in one connection" was written to the rejectlog but not the mainlog, except
3617 when address rewriting (yes!) was being logged.
3619 75. Added write_rejectlog option.
3621 76. When a system filter was run not as root (that is, when system_filter_user
3622 was set), the values of the $n variables were not being returned to the
3623 main process; thus, they were not subsequently available in the $sn
3626 77. Added +return_path_on_delivery log selector.
3628 78. A connection timeout was being treated differently from recipients deferred
3629 when testing hosts_max_try with a message that was older than the host's
3630 retry timeout. (The host should not be counted, thus allowing all hosts to
3631 be tried at least once before bouncing.) This may have been the cause of an
3632 occasionally reported bug whereby a message would remain on the queue
3633 longer than the retry timeout, but would be bounced if a delivery was
3634 forced. I say "may" because I never totally pinned down the problem;
3635 setting up timeout/retry tests is difficult. See also the next item.
3637 79. The ultimate address timeout was not being applied to errors that involved
3638 a combination of host plus message (for example, a timeout on a MAIL
3639 command). When an address resolved to a number of possible hosts, and they
3640 were not all tried for each delivery (e.g. because of hosts_max_try), a
3641 message could remain on the queue longer than the retry timeout.
3643 80. Sieve bug: "stop" inside "elsif" was broken. Applied a patch from Michael
3646 81. Fixed an obscure SMTP outgoing bug which required at least the following
3647 conditions: (a) there was another message waiting for the same server;
3648 (b) the server returned 5xx to all RCPT commands in the first message so
3649 that the message was not completed; (c) the server dropped the connection
3650 or gave a negative response to the RSET that Exim sends to abort the
3651 transaction. The observed case was a dropped connection after DATA that had
3652 been sent in pipelining mode. That is, the server had advertised PIPELINING
3653 but was not implementing it correctly. The effect of the bug was incorrect
3654 behaviour, such as trying another host, and this could lead to a crash.
3660 1. The 3rd arguments to getsockname(), getpeername(), and accept() in exim.c
3661 and daemon.c were passed as pointers to ints; they should have been
3662 pointers to socklen_t variables (which are typically unsigned ints).
3664 2. Some signed/unsigned type warnings in the os.c file for Linux have been
3667 3. Fixed a really odd bug that affected only the testing scheme; patching a
3668 certain fixed string in the binary changed the value of another string that
3669 happened to be identical to the end of the original first string.
3671 4. When gethostbyname() (or equivalent) is passed an IP address as a "host
3672 name", it returns that address as the IP address. On some operating
3673 systems (e.g. Solaris), it also passes back the IP address string as the
3674 "host name". However, on others (e.g. Linux), it passes back an empty
3675 string. Exim wasn't checking for this, and was changing the host name to an
3676 empty string, assuming it had been canonicized.
3678 5. Although rare, it is permitted to have more than one PTR record for a given
3679 IP address. I thought that gethostbyaddr() or getipnodebyaddr() always gave
3680 all the names associated with an address, because they do in Solaris.
3681 However, it seems that they do not in Linux for data that comes from the
3682 DNS. If an address in /etc/hosts has multiple names, they _are_ all given.
3683 I found this out when I moved to a new Linux workstation and tried to run
3684 the Exim test suite.
3686 To get round this problem I have changed the code so that it now does its
3687 own call to the DNS to look up PTR records when searching for a host name.
3688 If nothing can be found in the DNS, it tries gethostbyaddr(), so that
3689 addresses that are only in /etc/hosts are still found.
3691 This behaviour is, however, controlled by an option called host_lookup_
3692 order, which defaults to "bydns:byaddr". If people want to use the other
3693 order, or indeed, just use one or the other means of lookup, they can
3694 specify it in this variable.
3696 6. If a PTR record yields an empty name, Exim treats it as non-existent. In
3697 some operating systems, this comes back from gethostbyaddr() as an empty
3698 string, and this is what Exim used to test for. However, it seems that in
3699 other systems, "." is yielded. Exim now tests for this case too.
3701 7. The values of check_spool_space and check_log_space are now held internally
3702 as a number of kilobytes instead of an absolute number of bytes. If a
3703 numbers is specified without 'K' or 'M', it is rounded up to the nearest
3704 kilobyte. This means that much larger values can be stored.
3706 8. Exim monitor: an attempt to get the action menu when not actually pointing
3707 at a message produces an empty menu entitled "No message selected". This
3708 works on Solaris (OpenWindows). However, XFree86 does not like a menu with
3709 no entries in it ("Shell widget menu has zero width and/or height"). So I
3710 have added a single, blank menu entry in this case.
3712 9. Added ${quote_local_part.
3714 10. MIME decoding is now applied to the contents of Subject: header lines when
3717 11. Now that a reference to $sender_host_address automatically causes a reverse
3718 lookup to occur if necessary (4.13/18), there is no need to arrange for a
3719 host lookup before query-style lookups in lists that might use this
3720 variable. This has therefore been abolished, and the "net-" prefix is no
3721 longer necessary for query-style lookups.
3723 12. The Makefile for SCO_SV contained a setting of LDFLAGS. This appears to
3724 have been a typo for LFLAGS, so it has been changed.
3726 13. The install script calls Exim with "-C /dev/null" in order to find the
3727 version number. If ALT_CONFIG_PREFIX was set, this caused an error message
3728 to be output. Howeve, since Exim outputs its version number before the
3729 error, it didn't break the script. It just looked ugly. I fixed this by
3730 always allowing "-C /dev/null" if the caller is root.
3732 14. Ignore overlarge ACL variable number when reading spool file - insurance
3733 against a later release with more variables having written the file.
3735 15. The standard form for an IPv6 address literal was being rejected by EHLO.
3736 Example: [IPv6:2002:c1ed:8229:10:202:2dff:fe07:a42a]. Exim now accepts
3737 this, as well as the form without the "IPv6" on the front.
3739 16. Added CHOWN_COMMAND=/usr/sbin/chown and LIBS=-lresolv to the
3740 OS/Makefile-Darwin file.
3742 17. Fixed typo in lookups/ldap.c: D_LOOKUP should be D_lookup. This applied
3743 only to LDAP libraries that do not have LDAP_OPT_DEREF.
3745 18. After change 4.21/52, "%ld" was used to format the contents of the $inode
3746 variable. However, some OS use ints for inodes. I've added cast to long int
3747 to get rid of the compiler warning.
3749 19. I had forgotten to lock out "/../" in configuration file names when
3750 ALT_CONFIG_PREFIX was set.
3752 20. Routers used for verification do not need to specify transports. However,
3753 if such a router generated a host list, and callout was configured, Exim
3754 crashed, because it could not find a port number from the (non-existent)
3755 transport. It now assumes port 25 in this circumstance.
3757 21. Added the -t option to exigrep.
3759 22. If LOOKUP_LSEARCH is defined, all three linear search methods (lsearch,
3760 wildlsearch, nwildlsearch) are compiled. LOOKUP_WILDLSEARCH and LOOKUP_
3761 NWILDLSEARCH are now obsolete, but retained for compatibility. If either of
3762 them is set, LOOKUP_LSEARCH is forced.
3764 23. "exim -bV" now outputs a list of lookups that are included in the binary.
3766 24. Added sender and host information to the "rejected by local_scan()" log
3767 line; previously there was no indication of these.
3769 25. Added .include_if_exists.
3771 26. Change 3.952/11 added an explicit directory sync on top of a file sync for
3772 Linux. It turns out that not all file systems support this. Apparently some
3773 versions of NFS do not. (It's rare to put Exim's spool on NFS, but people
3774 do it.) To cope with this, the error EINVAL, which means that sync-ing is
3775 not supported on the file descriptor, is now ignored when Exim is trying to
3776 sync a directory. This applies only to Linux.
3778 27. Added -DBIND_8_COMPAT to the CLFAGS setting for Darwin.
3780 28. In Darwin (MacOS X), the PAM headers are in /usr/include/pam and not in
3781 /usr/include/security. There's now a flag in OS/os.h-Darwin to cope with
3784 29. Added support for maildirsize files from supplied patch (modified a bit).
3786 30. The use of :fail: followed by an empty string could lead Exim to respond to
3787 sender verification failures with (e.g.):
3789 550 Verification failed for <xxx>
3790 550 Sender verify failed
3792 where the first response line was missing the '-' that indicates it is not
3793 the final line of the response.
3795 31. The loop for finding the name of the user that called Exim had a hardwired
3796 limit of 10; it now uses the value of finduser_retries, which is used for
3797 all other user lookups.
3799 32. Added $received_count variable, available in data and not_smtp ACLs, and at
3802 33. Exim was neglecting to zero errno before one call of strtol() when
3803 expanding a string and expecting an integer value. On some systems this
3804 resulted in spurious "integer overflow" errors. Also, it was casting the
3805 result into an int without checking.
3807 34. Testing for a connection timeout using "timeout_connect" in the retry rules
3808 did not work. The code looks as if it has *never* worked, though it appears
3809 to have been documented since at least releast 1.62. I have made it work.
3811 35. The "timeout_DNS" error in retry rules, also documented since at least
3812 1.62, also never worked. As it isn't clear exactly what this means, and
3813 clearly it isn't a major issue, I have abolished the feature by treating it
3814 as "timeout", and writing a warning to the main and panic logs.
3816 36. The display of retry rules for -brt wasn't always showing the error code
3819 37. Added new error conditions to retry rules: timeout_A, timeout_MX,
3820 timeout_connect_A, timeout_connect_MX.
3822 38. Rewriting the envelope sender at SMTP time did not allow it to be rewritten
3823 to the empty sender.
3825 39. The daemon was not analysing the content of -oX till after it had closed
3826 stderr and disconnected from the controlling terminal. This meant that any
3827 syntax errors were only noted on the panic log, and the return code from
3828 the command was 0. By re-arranging the code a little, I've made the
3829 decoding happen first, so such errors now appear on stderr, and the return
3830 code is 1. However, the actual setting up of the sockets still happens in
3831 the disconnected process, so errors there are still only recorded on the
3834 40. A daemon listener on a wildcard IPv6 socket that also accepts IPv4
3835 connections (as happens on some IP stacks) was logged at start up time as
3836 just listening for IPv6. It now logs "IPv6 with IPv4". This differentiates
3837 it from "IPv6 and IPv4", which means that two separate sockets are being
3840 41. The debug output for gethostbyname2() or getipnodebyname() failures now
3841 says whether AF_INET or AF_INET6 was passed as an argument.
3843 42. Exiwhat output was messed up when time zones were included in log
3846 43. Exiwhat now gives more information about the daemon's listening ports,
3847 and whether -tls-on-connect was used.
3849 44. The "port" option of the smtp transport is now expanded.
3851 45. A "message" modifier in a "warn" statement in a non-message ACL was being
3852 silently ignored. Now an error message is written to the main and panic
3855 46. There's a new ACL modifier called "logwrite" which writes to a log file
3856 as soon as it is encountered.
3858 47. Added $local_user_uid and $local_user_gid at routing time.
3860 48. Exim crashed when trying to verify a sender address that was being
3863 49. Exim was recognizing only a space character after ".include". It now also
3864 recognizes a tab character.
3866 50. Fixed several bugs in the Perl script that creates the exim.8 man page by
3867 extracting the relevant information from the specification. The man page no
3868 longer contains scrambled data for the -d option, and I've added a section
3869 at the front about calling Exim under different names.
3871 51. Added "extra_headers" argument to the "mail" command in filter files.
3873 52. Redirecting mail to an unqualified address in a Sieve filter caused Exim to
3876 53. Installed eximstats 1.29.
3878 54. Added transport_filter_timeout as a generic transport option.
3880 55. Exim no longer adds an empty Bcc: header to messages that have no To: or
3881 Cc: header lines. This was required by RFC 822, but it not required by RFC
3884 56. Exim used to add From:, Date:, and Message-Id: header lines to any
3885 incoming messages that did not have them. Now it does so only if the
3886 message originates locally, that is, if there is no associated remote host
3887 address. When Resent- header lines are present, this applies to the Resent-
3888 lines rather than the non-Resent- lines.
3890 57. Drop incoming SMTP connection after too many syntax or protocol errors. The
3891 limit is controlled by smtp_max_synprot_errors, defaulting to 3.
3893 58. Messages for configuration errors now include the name of the main
3894 configuration file - useful now that there may be more than one file in a
3895 list (.included file names were always shown).
3897 59. Change 4.21/82 (run initgroups() when starting the daemon) causes problems
3898 for those rare installations that do not start the daemon as root or run it
3899 setuid root. I've cut out the call to initgroups() if the daemon is not
3902 60. The Exim user and group can now be bound into the binary as text strings
3903 that are looked up at the start of Exim's processing.
3905 61. Applied a small patch for the Interbase code, supplied by Ard Biesheuvel.
3907 62. Added $mailstore_basename variable.
3909 63. Installed patch to sieve.c from Michael Haardt.
3911 64. When Exim failed to open the panic log after failing to open the main log,
3912 the original message it was trying to log was written to stderr and debug
3913 output, but if they were not available (the usual case in production), it
3914 was lost. Now it is written to syslog before the two lines that record the
3915 failures to open the logs.
3917 65. Users' Exim filters run in subprocesses under the user's uid. It is
3918 possible for a "deliver" command or an alias in a "personal" command to
3919 provoke an address rewrite. If logging of address rewriting is configured,
3920 this fails because the process is not running as root or exim. There may be
3921 a better way of dealing with this, but for the moment (because 4.30 needs
3922 to be released), I have disabled address rewrite logging when running a
3923 filter in a non-root, non-exim process.
3929 1. The buildconfig auxiliary program wasn't quoting the value set for
3930 HEADERS_CHARSET. This caused a compilation error complaining that 'ISO' was
3931 not defined. This bug was masked in 4.22 by the effect that was fixed in
3934 2. Some messages that were rejected after a message id was allocated were
3935 shown as "incomplete" by exigrep. It no longer does this for messages that
3936 are rejected by local_scan() or the DATA or non-SMTP ACLs.
3938 3. If a Message-ID: header used a domain literal in the ID, and Exim did not
3939 have allow_domain_literals set, the ID did not get logged in the <= line.
3940 Domain literals are now always recognized in Message-ID: header lines.
3942 4. The first argument for a ${extract expansion item is the key name or field
3943 number. Leading and trailing spaces in this item were not being ignored,
3944 causing some misleading effects.
3946 5. When deliver_drop_privilege was set, single queue runner processes started
3947 manually (i.e. by the command "exim -q") or by the daemon (which uses the
3948 same command in the process it spins off) were not dropping privilege.
3950 6. When the daemon running as "exim" started a queue runner, it always
3951 re-executed Exim in the spun-off process. This is a waste of effort when
3952 deliver_drop_privilege is set. The new process now just calls the
3953 queue-runner function directly.
3959 1. Typo in the src/EDITME file: it referred to HEADERS_DECODE_TO instead of
3962 2. Change 4.21/73 introduced a bug. The pid file path set by -oP was being
3963 ignored. Though the use of -oP was forcing the writing of a pid file, it
3964 was always written to the default place.
3966 3. If the message "no IP address found for host xxxx" is generated during
3967 incoming verification, it is now followed by identification of the incoming
3968 connection (so you can more easily find what provoked it).
3970 4. Bug fix for Sieve filters: "stop" inside a block was not working properly.
3972 5. Added some features to "harden" Exim a bit more against certain attacks:
3974 (a) There is now a build-time option called FIXED_NEVER_USERS that can
3975 be put in Local/Makefile. This is like the never_users runtime option,
3976 but it cannot be overridden. The default setting is "root".
3978 (b) If ALT_CONFIG_PREFIX is defined in Local/Makefile, it specifies a
3979 prefix string with which any file named in a -C command line option
3982 (c) If ALT_CONFIG_ROOT_ONLY is defined in Local/Makefile, root privilege
3983 is retained for -C and -D only if the caller of Exim is root. Without
3984 it, the exim user may also use -C and -D and retain privilege.
3986 (d) If DISABLE_D_OPTION is defined in Local/Makefile, the use of the -D
3987 command line option is disabled.
3989 6. Macro names set by the -D option must start with an upper case letter, just
3990 like macro names defined in the configuration file.
3992 7. Added "dereference=" facility to LDAP.
3994 8. Two instances of the typo "uknown" in the source files are fixed.
3996 9. If a PERL_COMMAND setting in Local/Makefile was not at the start of a line,
3997 the Configure-Makefile script screwed up while processing it.
3999 10. Incorporated PCRE 4.4.
4001 11. The SMTP synchronization check was not operating right at the start of an
4002 SMTP session. For example, it could not catch a HELO sent before the client
4003 waited for the greeting. There is now a check for outstanding input at the
4004 point when the greeting is written. Because of the duplex, asynchronous
4005 nature of TCP/IP, it cannot be perfect - the incorrect input may be on its
4006 way, but not yet received, when the check is performed.
4008 12. Added tcp_nodelay to make it possible to turn of the setting of TCP_NODELAY
4009 on TCP/IP sockets, because this apparently causes some broken clients to
4012 13. Installed revised OS/Makefile-CYGWIN and OS/os.c-cygwin (the .h file was
4013 unchanged) from the Cygwin maintainer.
4015 14. The code for -bV that shows what is in the binary showed "mbx" when maildir
4016 was supported instead of testing for mbx. Effectively a typo.
4018 15. The spa authenticator server code was not checking that the input it
4019 received was valid base64.
4021 16. The debug output line for the "set" modifier in ACLs was not showing the
4022 name of the variable that was being set.
4024 17. Code tidy: the variable type "vtype_string" was never used. Removed it.
4026 18. Previously, a reference to $sender_host_name did not cause a DNS reverse
4027 lookup on its own. Something else was needed to trigger the lookup. For
4028 example, a match in host_lookup or the need for a host name in a host list.
4029 Now, if $sender_host_name is referenced and the host name has not yet been
4030 looked up, a lookup is performed. If the lookup fails, the variable remains
4031 empty, and $host_lookup_failed is set to "1".
4033 19. Added "eqi" as a case-independent comparison operator.
4035 20. The saslauthd authentication condition could segfault if neither service
4036 nor realm was specified.
4038 21. If an overflowing value such as "2048M" was set for message_size_limit, the
4039 error message that was logged was misleading, and incoming SMTP
4040 connections were dropped. The message is now more accurate, and temporary
4041 errors are given to SMTP connections.
4043 22. In some error situations (such as 21 above) Exim rejects all SMTP commands
4044 (except RSET) with a 421 error, until QUIT is received. However, it was
4045 failing to send a response to QUIT.
4047 23. The HELO ACL was being run before the code for helo_try_verify_hosts,
4048 which made it impossible to use "verify = helo" in the HELO ACL. The HELO
4049 ACL is now run after the helo_try_verify_hosts code.
4051 24. "{MD5}" and "{SHA1}" are now recognized as equivalent to "{md5"} and
4052 "{sha1}" in the "crypteq" expansion condition (in fact the comparison is
4053 case-independent, so other case variants are also recognized). Apparently
4054 some systems use these upper case variants.
4056 25. If more than two messages were waiting for the same host, and a transport
4057 filter was specified for the transport, Exim sent two messages over the
4058 same TCP/IP connection, and then failed with "socket operation on non-
4059 socket" when it tried to send the third.
4061 26. Added Exim::debug_write and Exim::log_write for embedded Perl use.
4063 27. The extern definition of crypt16() in expand.c was not being excluded when
4064 the OS had its own crypt16() function.
4066 28. Added bounce_return_body as a new option, and bounce_return_size_limit
4067 as a preferred synonym for return_size_limit, both as an option and as an
4070 29. Added LIBS=-liconv to OS/Makefile-OSF1.
4072 30. Changed the default configuration ACL to relax the local part checking rule
4073 for addresses that are not in any local domains. For these addresses,
4074 slashes and pipe symbols are allowed within local parts, but the sequence
4075 /../ is explicitly forbidden.
4077 31. SPA server authentication was not clearing the challenge buffer before
4080 32. log_message in a "warn" ACL statement was writing to the reject log as
4081 well as to the main log, which contradicts the documentation and doesn't
4082 seem right (because no rejection is happening). So I have stopped it.
4084 33. Added Ard Biesheuvel's lookup code for accessing an Interbase database.
4085 However, I am unable to do any testing of this.
4087 34. Fixed an infelicity in the appendfile transport. When checking directories
4088 for a mailbox, to see if any needed to be created, it was accidentally
4089 using path names with one or more superfluous leading slashes; tracing
4090 would show up entries such as stat("///home/ph10", 0xFFBEEA48).
4092 35. If log_message is set on a "discard" verb in a MAIL or RCPT ACL, its
4093 contents are added to the log line that is written for every discarded
4094 recipient. (Previously a log_message setting was ignored.)
4096 36. The ${quote: operator now quotes the string if it is empty.
4098 37. The install script runs exim in order to find its version number. If for
4099 some reason other than non-existence or emptiness, which it checks, it
4100 could not run './exim', it was installing it with an empty version number,
4101 i.e. as "exim-". This error state is now caught, and the installation is
4104 38. An argument was missing from the function that creates an error message
4105 when Exim fails to connect to the socket for saslauthd authentication.
4106 This could cause Exim to crash, or give a corrupted message.
4108 39. Added isip, isip4, and isip6 to ${if conditions.
4110 40. The ACL variables $acl_xx are now saved with the message, and can be
4111 accessed later in routers, transports, and filters.
4113 41. The new lookup type nwildlsearch is like wildlsearch, except that the key
4114 strings in the file are not string-expanded.
4116 42. If a MAIL command specified a SIZE value that was too large to fit into an
4117 int variable, the check against message_size_limit failed. Such values are
4118 now forced to INT_MAX, which is around 2Gb for a 32-bit variable. Maybe one
4119 day this will have to be increased, but I don't think I want to be around
4120 when emails are that large.
4127 1. Removed HAVE_ICONV=yes from OS/Makefile-FreeBSD, since it seems that
4128 iconv() is not standard in FreeBSD.
4130 2. Change 4.21/17 was buggy and could cause stack overwriting on a system with
4131 IPv6 enabled. The observed symptom was a segmentation fault on return from
4132 the function os_common_find_running_interfaces() in src/os.c.
4134 3. In the check_special_case() function in daemon.c I had used "errno" as an
4135 argument name, which causes warnings on some systems. This was basically a
4136 typo, since it was named "eno" in the comments!
4138 4. The code that waits for the clock to tick (at a resolution of some fraction
4139 of a second) so as to ensure message-id uniqueness was always waiting for
4140 at least one whole tick, when it could have waited for less. [This is
4141 almost certainly not relevant at current processor speeds, where it is
4142 unlikely to ever wait at all. But we try to future-proof.]
4144 5. The function that sleeps for a time interval that includes fractions of a
4145 second contained a race. It did not block SIGALRM between setting the
4146 timer, and suspending (a couple of lines later). If the interval was short
4147 and the sigsuspend() was delayed until after it had expired, the suspension
4148 never ended. On busy systems this could lead to processes getting stuck for
4151 6. Some uncommon configurations may cause a lookup to happen in a queue runner
4152 process, before it forks any delivery processes. The open lookup caching
4153 mechanism meant that the open file or database connection was passed into
4154 the delivery process. The problem was that delivery processes always tidy
4155 up cached lookup data. This could cause a problem for the next delivery
4156 process started by the queue runner, because the external queue runner
4157 process does not know about the closure. So the next delivery process
4158 still has data in the lookup cache. In the case of a file lookup, there was
4159 no problem because closing a file descriptor in a subprocess doesn't affect
4160 the parent. However, if the lookup was caching a connection to a database,
4161 the connection was closed, and the second delivery process was likely to
4162 see errors such as "PGSQL: query failed: server closed the connection
4163 unexpectedly". The problem has been fixed by closing all cached lookups
4164 in a queue runner before running a delivery process.
4166 7. Compiler warning on Linux for the second argument of iconv(), which doesn't
4167 seem to have the "const" qualifier which it has on other OS. I've
4170 8. Change 4.21/2 was too strict. It is only if there are two authenticators
4171 *of the same type* (client or server) with the same public name that an
4172 error should be diagnosed.
4174 9. When Exim looked up a host name for an IP address, but failed to find the
4175 original IP address when looking up the host name (a safety check), it
4176 output the message "<ip address> does not match any IP for NULL", which was
4177 confusing, to say the least. The bug was that the host name should have
4178 appeared instead of "NULL".
4180 10. Since release 3.03, if Exim is called by a uid other than root or the Exim
4181 user that is built into the binary, and the -C or -D options is used, root
4182 privilege is dropped before the configuration file is read. In addition,
4183 logging is switched to stderr instead of the normal log files. If the
4184 configuration then re-defines the Exim user, the unprivileged environment
4185 is probably not what is expected, so Exim logs a panic warning message (but
4188 However, if deliver_drop_privilege is set, the unprivileged state may well
4189 be exactly what is intended, so the warning has been cut out in that case,
4190 and Exim is allowed to try to write to its normal log files.
4196 1. smtp_return_error_details was not giving details for temporary sender
4197 or receiver verification errors.
4199 2. Diagnose a configuration error if two authenticators have the same public
4202 3. Exim used not to create the message log file for a message until the first
4203 delivery attempt. This could be confusing when incoming messages were held
4204 for policy or load reasons. The message log file is now created at the time
4205 the message is received, and an initial "Received" line is written to it.
4207 4. The automatically generated man page for command line options had a minor
4208 bug that caused no ill effects; however, a more serious problem was that
4209 the procedure for building the man page automatically didn't always
4210 operate. Consequently, release 4.20 contains an out-of-date version. This
4211 shouldn't happen again.
4213 5. When building Exim with embedded Perl support, the script that builds the
4214 Makefile was calling 'perl' to find its compile-time parameters, ignoring
4215 any setting of PERL_COMMAND in Local/Makefile. This is now fixed.
4217 6. The freeze_tell option was not being used for messages that were frozen on
4218 arrival, either by an ACL or by local_scan().
4220 7. Added the smtp_incomplete_transaction log selector.
4222 8. After STARTTLS, Exim was not forgetting that it had advertised AUTH, so it
4223 was accepting AUTH without a new EHLO.
4225 9. Added tls_remember_esmtp to cope with YAEB. This allows AUTH and other
4226 ESMTP extensions after STARTTLS without a new EHLO, in contravention of the
4229 10. Logging of TCP/IP connections (when configured) now happens in the main
4230 daemon process instead of the child process, so that the TCP/IP connection
4231 count is more accurate (but it can never be perfect).
4233 11. The use of "drop" in a nested ACL was not being handled correctly in the
4234 outer ACL. Now, if condition failure induced by the nested "drop" causes
4235 the outer ACL verb to deny access ("accept" or "discard" after "endpass",
4236 or "require"), the connection is dropped.
4238 12. Similarly, "discard" in a nested ACL wasn't being handled. A nested ACL
4239 that yield "discard" can now be used with an "accept" or a "discard" verb,
4240 but an error is generated for any others (because I can't see a useful way
4241 to define what should happen).
4243 13. When an ACL is read dynamically from a file (or anywhere else), the lines
4244 are now processed in the same way as lines in the Exim configuration file.
4245 In particular, continuation lines are supported.
4247 14. Added the "dnslists = a.b.c!=n.n.n.n" feature.
4249 15. Added -ti meaning -t -i.
4251 16. Check for letters, digits, hyphens, and dots in the names of dnslist
4252 domains, and warn by logging if others are found.
4254 17. At least on BSD, alignment is not guarenteed for the array of ifreq's
4255 returned from GIFCONF when Exim is trying to find the list of interfaces on
4256 a host. The code in os.c has been modified to copy each ifreq to an aligned
4257 structure in all cases.
4259 Also, in some cases, the returned ifreq's were being copied to a 'struct
4260 ifreq' on the stack, which was subsequently passed to host_ntoa(). That
4261 means the last couple of bytes of an IPv6 address could be chopped if the
4262 ifreq contained only a normal sockaddr (14 bytes storage).
4264 18. Named domain lists were not supported in the hosts_treat_as_local option.
4265 An entry such as +xxxx was not recognized, and was treated as a literal
4268 19. Ensure that header lines added by a DATA ACL are included in the reject log
4269 if the ACL subsequently rejects the message.
4271 20. Upgrade the cramtest.pl utility script to use Digest::MD5 instead of just
4272 MD5 (which is deprecated).
4274 21. When testing a filter file using -bf, Exim was writing a message when it
4275 took the sender from a "From " line in the message, but it was not doing so
4276 when it took $return_path from a Return-Path: header line. It now does.
4278 22. If the contents of a "message" modifier for a "warn" ACL verb do not begin
4279 with a valid header line field name (a series of printing characters
4280 terminated by a colon, Exim now inserts X-ACL-Warn: at the beginning.
4282 23. Changed "disc" in the source to "disk" to conform to the documentation and
4283 the book and for uniformity.
4285 24. Ignore Sendmail's -Ooption=value command line item.
4287 25. When execve() failed while trying to run a command in a pipe transport,
4288 Exim was returning EX_UNAVAILBLE (69) from the subprocess. However, this
4289 could be confused with a return value of 69 from the command itself. This
4290 has been changed to 127, the value the shell returns if it is asked to run
4291 a non-existent command. The wording for the related log line suggests a
4292 non-existent command as the problem.
4294 26. If received_header_text expands to an empty string, do not add a Received:
4295 header line to the message. (Well, it adds a token one on the spool, but
4296 marks it "old" so that it doesn't get used or transmitted.)
4298 27. Installed eximstats 1.28 (addition of -nt option).
4300 28. There was no check for failure on the call to getsockname() in the daemon
4301 code. This can fail if there is a shortage of resources on the system, with
4302 ENOMEM, for example. A temporary error is now given on failure.
4304 29. Contrary to the C standard, it seems that in some environments, the
4305 equivalent of setlocale(LC_ALL, "C") is not obeyed at the start of a C
4306 program. Exim now does this explicitly; it affects the formatting of
4307 timestamps using strftime().
4309 30. If exiqsumm was given junk data, it threw up some uninitialized variable
4310 complaints. I've now initialized all the variables, to avoid this.
4312 32. Header lines added by a system filter were not being "seen" during
4313 transport-time rewrites.
4315 33. The info_callback() function passed to OpenSSL is set up with type void
4316 (*)(SSL *, int, int), as described somewhere. However, when calling the
4317 function (actually a macro) that sets it up, the type void(*)() is
4318 expected. I've put in a cast to prevent warnings from picky compilers.
4320 34. If a DNS black list lookup found a CNAME record, but there were no A
4321 records associated with the domain it pointed at, Exim crashed.
4323 35. If a DNS black list lookup returned more than one A record, Exim ignored
4324 all but the first. It now scans all returned addresses if a particular IP
4325 value is being sought. In this situation, the contents of the
4326 $dnslist_value variable are a list of all the addresses, separated by a
4329 36. Tightened up the rules for host name lookups using reverse DNS. Exim used
4330 to accept a host name and all its aliases if the forward lookup for any of
4331 them yielded the IP address of the incoming connection. Now it accepts only
4332 those names whose forward lookup yields the correct IP address. Any other
4333 names are discarded. This closes a loophole whereby a rogue DNS
4334 administrator could create reverse DNS records to break through a
4335 wildcarded host restriction in an ACL.
4337 37. If a user filter or a system filter that ran in a subprocess used any of
4338 the numerical variables ($1, $2 etc), or $thisaddress, in a pipe command,
4339 the wrong values were passed to the pipe command ($thisaddress had the
4340 value of $0, $0 had the value of $1, etc). This bug was introduced by
4341 change 4.11/101, and not discovered because I wrote an inadequate test. :-(
4343 38. Improved the line breaking for long SMTP error messages from ACLs.
4344 Previously, if there was no break point between 40 and 75 characters, Exim
4345 left the rest of the message alone. Two changes have been made: (a) I've
4346 reduced the minimum length to 35 characters; (b) if it can't find a break
4347 point between 35 and 75 characters, it looks ahead and uses the first one
4348 that it finds. This may give the occasional overlong line, but at least the
4349 remaining text gets split now.
4351 39. Change 82 of 4.11 was unimaginative. It assumed the limit on the number of
4352 file descriptors might be low, and that setting 1000 would always raise it.
4353 It turns out that in some environments, the limit is already over 1000 and
4354 that lowering it causes trouble. So now Exim takes care not to decrease it.
4356 40. When delivering a message, the value of $return_path is set to $sender_
4357 address at the start of routing (routers may change the value). By an
4358 oversight, this default was not being set up when an address was tested by
4359 -bt or -bv, which affected the outcome if any router or filter referred to
4362 41. The idea of the "warn" ACL verb is that it adds a header or writes to the
4363 log only when "message" or "log_message" are set. However, if one of the
4364 conditions was an address verification, or a call to a nested ACL, the
4365 messages generated by the underlying test were being passed through. This
4366 no longer happens. The underlying message is available in $acl_verify_
4367 message for both "message" and "log_message" expansions, so it can be
4368 passed through if needed.
4370 42. Added RFC 2047 interpretation of header lines for $h_ expansions, with a
4371 new expansion $bh_ to give the encoded byte string without charset
4372 translation. Translation happens only if iconv() is available; HAVE_ICONV
4373 indicates this at build time. HEADERS_CHARSET gives the charset to
4374 translate to; headers_charset can change it in the configuration, and
4375 "headers charset" can change it in an individual filter file.
4377 43. Now that we have a default RFC 2047 charset (see above), the code in Exim
4378 that creates RFC 2047 encoded "words" labels them as that charset instead
4379 of always using iso-8859-1. The cases are (i) the explicit ${rfc2047:
4380 expansion operator; (ii) when Exim creates a From: line for a local
4381 message; (iii) when a header line is rewritten to include a "phrase" part.
4383 44. Nasty bug in exiqsumm: the regex to skip already-delivered addresses was
4384 buggy, causing it to skip the first lines of messages whose message ID
4385 ended in 'D'. This would not have bitten before Exim release 4.14, because
4386 message IDs were unlikely to end in 'D' before then. The effect was to have
4387 incorrect size information for certain domains.
4389 45. #include "config.h" was missing at the start of the crypt16.c module. This
4390 caused trouble on Tru64 (aka OSF1) systems, because HAVE_CRYPT16 was not
4393 46. If there was a timeout during a "random" callout check, Exim treated it as
4394 a failure of the random address, and carried on sending RSET and the real
4395 address. If the delay was just some slowness somewhere, the response to the
4396 original RCPT would be taken as a response to RSET and so on, causing
4397 mayhem of various kinds.
4399 47. Change 50 for 4.20 was a heap of junk. I don't know what I was thinking
4400 when I implemented it. It didn't allow for the fact that some option values
4401 may legitimatetly be negative (e.g. size_addition), and it didn't even do
4402 the right test for positive values.
4404 48. Domain names in DNS records are case-independent. Exim always looks them up
4405 in lower case. Some resolvers return domain names in exactly the case they
4406 appear in the zone file, that is, they may contain uppercase letters. Not
4407 all resolvers do this - some return always lower case. Exim was treating a
4408 change of case by a resolver as a change of domain, similar to a widening
4409 of a domain abbreviation. This triggered its re-routing code and so it was
4410 trying to route what was effectively the same domain again. This normally
4411 caused routing to fail (because the router wouldn't handle the domain
4412 twice). Now Exim checks for this case specially, and just changes the
4413 casing of the domain that it ultimately uses when it transmits the message
4416 49. Added Sieve (RFC 3028) support, courtesy of Michael Haardt's contributed
4419 50. If a filter generated a file delivery with a non-absolute name (possible if
4420 no home directory exists for the router), the forbid_file option was not
4423 51. Added '&' feature to dnslists, to provide bit mask matching in addition to
4424 the existing equality matching.
4426 52. Exim was using ints instead of ino_t variables in some places where it was
4427 dealing with inode numbers.
4429 53. If TMPDIR is defined in Local/Makefile (default in src/EDITME is
4430 TMPDIR="/tmp"), Exim checks for the presence of an environment variable
4431 called TMPDIR, and if it finds it is different, it changes its value.
4433 54. The smtp_printf() function is now made available to local_scan() so
4434 additional output lines can be written before returning. There is also an
4435 smtp_fflush() function to enable the detection of a dropped connection.
4436 The variables smtp_input and smtp_batched_input are exported to
4439 55. Changed the default runtime configuration: the message "Unknown user"
4440 has been removed from the ACL, and instead placed on the localuser router,
4441 using the cannot_route_message feature. This means that any verification
4442 failures that generate their own messages won't get overridden. Similarly,
4443 the "Unrouteable address" message that was in the ACL for unverifiable
4444 relay addresses has also been removed.
4446 56. Added hosts_avoid_esmtp to the smtp transport.
4448 57. The exicyclog script was not checking for the esoteric option
4449 CONFIGURE_FILE_USE_EUID in the Local/Makefile. It now does this, but it
4450 will work only if exicyclog is run under the appropriate euid.
4452 58. Following a discussion on the list, the rules by which Exim recognises line
4453 endings on incoming messages have been changed. The -dropcr and drop_cr
4454 options are now no-ops, retained only for backwards compatibility. The
4455 following line terminators are recognized: LF CRLF CR. However, special
4456 processing applies to CR:
4458 (i) The sequence CR . CR does *not* terminate an incoming SMTP message,
4459 nor a local message in the state where . is a terminator.
4461 (ii) If a bare CR is encountered in a header line, an extra space is added
4462 after the line terminator so as not to end the header. The reasoning
4463 behind this is that bare CRs in header lines are most likely either
4464 to be mistakes, or people trying to play silly games.
4466 59. The size of a message, as listed by "-bp" or in the Exim monitor window,
4467 was being incorrectly given as 18 bytes larger than it should have been.
4468 This is a VOB (very old bug).
4470 60. This may never have affected anything current, but just in case it has:
4471 When the local host is found other than at the start of a list of hosts,
4472 the local host, those with the same MX, and any that follow, are discarded.
4473 When the list in question was part of a longer list of hosts, the following
4474 hosts (not currently being processed) were also being discarded. This no
4475 longer happens. I'm not sure if this situation could ever has previously
4478 61. Added the "/MX" feature to lists of hosts in the manualroute and query
4481 62. Whenever Exim generates a new message, it now adds an Auto-Submitted:
4482 header. This is something that is recommended in a new Internet Draft, and
4483 is something that is documented as being done by Sendmail. There are two
4484 possible values. For messages generated by the autoreply transport, Exim
4487 Auto-Submitted: auto-replied
4489 whereas for all other generated messages (e.g. bounces) it adds
4491 Auto-Submitted: auto-generated
4493 63. The "personal" condition in filters now includes a test for the
4494 Auto-Submitted: header. If it contains the string "auto-" the message it
4495 not considered personal.
4497 64. Added rcpt_include_affixes as a generic transport option.
4499 65. Added queue_only_override (default true).
4501 66. Added the syslog_duplication option.
4503 67. If what should have been the first header line of a message consisted of
4504 a space followed by a colon, Exim was mis-interpreting it as a header line.
4505 It isn't of course - it is syntactically invalid and should therefore be
4506 treated as the start of the message body. The misbehaviour could have
4507 caused a number of strange effects, including loss of data in subsequent
4508 header lines, and spool format errors.
4510 68. Formerly, the AUTH parameter on a MAIL command was trusted only if the
4511 client host had authenticated. This control can now be exercised by an ACL
4512 for more flexibility.
4514 69. By default, callouts do not happen when testing with -bh. There is now a
4515 variant, -bhc, which does actually run the callout code, including
4516 consulting and updating the callout cache.
4518 70. Added support for saslauthd authentication, courtesy of Alexander
4521 71. If statvfs() failed on the spool or log directories while checking their
4522 size for availability, Exim confusingly gave the error "space shortage".
4523 Furthermore, in debugging mode it crashed with a floating point exception.
4524 These checks are done if check_{spool,log}_{space,inodes} are set, and when
4525 an SMTP message arrives with SIZE= on the MAIL command. As this is a really
4526 serious problem, Exim now writes to the main and panic logs when this
4527 happens, with details of the failure. It then refuses to accept the
4528 incoming message, giving the message "spool directory problem" or "log
4529 directory problem" with a 421 code for SMTP messages.
4531 72. When Exim is about to re-exec itself, it ensures that the file descriptors
4532 0, 1, and 2 exist, because some OS complain for execs without them (see
4533 ChangeLog 4.05/30). If necessary, Exim opens /dev/null to use for these
4534 descriptors. However, the code omitted to check that the open succeeded,
4535 causing mysterious errors if for some reason the permissions on /dev/null
4536 got screwed. Now Exim writes a message to the main and panic logs, and
4537 bombs out if it can't open /dev/null.
4539 73. Re-vamped the way daemon_smtp_port, local_interfaces, and -oX work and
4540 interact so that it is all more flexible. It is supposed to remain
4541 backwards compatible. Also added extra_local_interfaces.
4543 74. Invalid data sent to a SPA (NTLM) server authenticator could cause the code
4544 to bomb out with an assertion failure - to the client this appears as a
4545 connection drop. This problem occurs in the part of the code that was taken
4546 from the Samba project. Fortunately, the assertion is in a very simple
4547 function, so I have fixed this by reproducing the function inline in the
4548 one place where it is called, and arranging for authentication to fail
4549 instead of killing the process with assert().
4551 75. The SPA client code was not working when the server requested OEM rather
4552 than Unicode encoding.
4554 76. Added code to make require_files with a specific uid setting more usable in
4555 the case where statting the file as root fails - usually a non-root-mounted
4556 NFS file system. When this happens and the failure is EACCES, Exim now
4557 forks a subprocess and does the per-uid checking as the relevant uid.
4559 77. Added process_log_path.
4561 78. If log_file_path was not explicitly set, a setting of check_log_space or
4562 check_log_inodes was ignored.
4564 79. If a space check for the spool or log partitions fails, the incident is now
4565 logged. Of course, in the latter case the data may get lost...
4567 80. Added the %p formatting code to string_format() so that it can be used to
4568 print addresses in debug_print(). Adjusted all the address printing in the
4569 debugging in store.c to use %p rather than %d.
4571 81. There was a concern that a line of code in smtp_in.c could overflow a
4572 buffer if a HELO/EHLO command was given followed by 500 or so spaces. As
4573 initially expressed, the concern was not well-founded, because trailing
4574 spaces are removed early. However, if the trailing spaces were followed by
4575 a NULL, they did not get removed, so the overflow was possible. Two fixes
4578 (a) I re-wrote the offending code in a cleaner fashion.
4579 (b) If an incoming SMTP command contains a NULL character, it is rejected
4582 82. When Exim changes uid/gid to the Exim user at daemon start time, it now
4583 runs initgroups(), so that if the Exim user is in any additional groups,
4584 they will be used during message reception.
4590 The change log for 4.20 and earlier releases has been archived.
git://git.exim.org / users / jgh / exim.git / blob