1 $Cambridge: exim/doc/doc-txt/ChangeLog,v 1.466 2007/01/31 11:30:08 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.
76 PH/01 Two more bugs that were introduced by 4.64/PH/07, in addition to the one
77 fixed by 4.65/MH/01 (is this a record?) are fixed:
79 (i) An empty string was always treated as zero by the numeric comparison
80 operators. This behaviour has been restored.
82 (ii) It is documented that the numeric comparison operators always treat
83 their arguments as decimal numbers. This was broken in that numbers
84 starting with 0 were being interpreted as octal.
86 While fixing these problems I realized that there was another issue that
87 hadn't been noticed. Values of message_size_limit (both the global option
88 and the transport option) were treated as octal if they started with 0.
89 The documentation was vague. These values are now always treated as
90 decimal, and I will make that clear in the documentation.
96 TK/01 Disable default definition of HAVE_LINUX_SENDFILE. Clashes with
97 Linux large file support (_FILE_OFFSET_BITS=64) on older glibc
100 MH/01 Don't check that the operands of numeric comparison operators are
101 integers when their expansion is in "skipping" mode (fixes bug
102 introduced by 4.64-PH/07).
104 PH/01 If a system filter or a router generates more than SHRT_MAX (32767)
105 child addresses, Exim now panics and dies. Previously, because the count
106 is held in a short int, deliveries were likely to be lost. As such a
107 large number of recipients for a single message is ridiculous
108 (performance will be very, very poor), I have chosen to impose a limit
109 rather than extend the field.
115 TK/01 Bugzilla #401. Fix DK spooling code so that it can overwrite a
116 leftover -K file (the existence of which was triggered by #402).
117 While we were at it, introduced process PID as part of the -K
118 filename. This should rule out race conditions when creating
121 TK/02 Bugzilla #402. Apply patch from Simon Arlott, speeding up DK signing
122 processing considerably. Previous code took too long for large mails,
123 triggering a timeout which in turn triggers #401.
125 TK/03 Introduced HAVE_LINUX_SENDFILE to os.h-Linux. Currently only used
126 in the DK code in transports.c. sendfile() is not really portable,
127 hence the _LINUX specificness.
129 TF/01 In the add_headers option to the mail command in an Exim filter,
130 there was a bug that Exim would claim a syntax error in any
131 header after the first one which had an odd number of characters
134 PH/01 If a server that rejects MAIL FROM:<> was the target of a sender
135 callout verification, Exim cached a "reject" for the entire domain. This
136 is correct for most verifications, but it is not correct for a recipient
137 verification with use_sender or use_postmaster set, because in that case
138 the callout does not use MAIL FROM:<>. Exim now distinguishes the special
139 case of MAIL FROM:<> rejection from other early rejections (e.g.
140 rejection of HELO). When verifying a recipient using a non-null MAIL
141 address, the cache is ignored if it shows MAIL FROM:<> rejection.
142 Whatever the result of the callout, the value of the domain cache is
143 left unchanged (for any other kind of callout, getting as far as trying
144 RCPT means that the domain itself is ok).
146 PH/02 Tidied a number of unused variable and signed/unsigned warnings that
149 PH/03 On Solaris, an unexpectedly close socket (dropped connection) can
150 manifest itself as EPIPE rather than ECONNECT. When tidying away a
151 session, the daemon ignores ECONNECT errors and logs others; it now
152 ignores EPIPE as well.
154 PH/04 Applied Nico Erfurth's refactoring patch to tidy up mime.c
155 (quoted-printable decoding).
157 PH/05 Applied Nico Erfurth's refactoring patch to tidy up spool_mbox.c, and
158 later the small subsequent patch to fix an introduced bug.
160 PH/06 Installed the latest Cygwin Makefile from the Cygwin maintainer.
162 PH/07 There was no check for overflow in expansions such as ${if >{1}{4096M}}.
164 PH/08 An error is now given if message_size_limit is specified negative.
166 PH/09 Applied and tidied up Jakob Hirsch's patch for allowing ACL variables
167 to be given (somewhat) arbitrary names.
169 JJ/01 exipick 20060919.0, allow for arbitrary acl_ variables introduced
172 JJ/02 exipick 20060919.0, --show-vars args can now be regular expressions,
173 miscellaneous code fixes
175 PH/10 Added the log_reject_target ACL modifier to specify where to log
178 PH/11 Callouts were setting the name used for EHLO/HELO from $smtp_active_
179 hostname. This is wrong, because it relates to the incoming message (and
180 probably the interface on which it is arriving) and not to the outgoing
181 callout (which could be using a different interface). This has been
182 changed to use the value of the helo_data option from the smtp transport
183 instead - this is what is used when a message is actually being sent. If
184 there is no remote transport (possible with a router that sets up host
185 addresses), $smtp_active_hostname is used.
187 PH/12 Installed Andrey Panin's patch to add a dovecot authenticator. Various
188 tweaks were necessary in order to get it to work (see also 21 below):
189 (a) The code assumed that strncpy() returns a negative number on buffer
190 overflow, which isn't the case. Replaced with Exim's string_format()
192 (b) There were several signed/unsigned issues. I just did the minimum
193 hacking in of casts. There is scope for a larger refactoring.
194 (c) The code used strcasecmp() which is not a standard C function.
195 Replaced with Exim's strcmpic() function.
196 (d) The code set only $1; it now sets $auth1 as well.
197 (e) A simple test gave the error "authentication client didn't specify
198 service in request". It would seem that Dovecot has changed its
199 interface. Fortunately there's a specification; I followed it and
200 changed what the client sends and it appears to be working now.
202 PH/13 Added $message_headers_raw to provide the headers without RFC 2047
205 PH/14 Corrected misleading output from -bv when -v was also used. Suppose the
206 address A is aliased to B and C, where B exists and C does not. Without
207 -v the output is "A verified" because verification stops after a
208 successful redirection if more than one address is generated. However,
209 with -v the child addresses are also verified. Exim was outputting "A
210 failed to verify" and then showing the successful verification for C,
211 with its parentage. It now outputs "B failed to verify", showing B's
212 parentage before showing the successful verification of C.
214 PH/15 Applied Michael Deutschmann's patch to allow DNS black list processing to
215 look up a TXT record in a specific list after matching in a combined
218 PH/16 It seems that the options setting for the resolver (RES_DEFNAMES and
219 RES_DNSRCH) can affect the behaviour of gethostbyname() and friends when
220 they consult the DNS. I had assumed they would set it the way they
221 wanted; and indeed my experiments on Linux seem to show that in some
222 cases they do (I could influence IPv6 lookups but not IPv4 lookups).
223 To be on the safe side, however, I have now made the interface to
224 host_find_byname() similar to host_find_bydns(), with an argument
225 containing the DNS resolver options. The host_find_byname() function now
226 sets these options at its start, just as host_find_bydns() does. The smtp
227 transport options dns_qualify_single and dns_search_parents are passed to
228 host_find_byname() when gethostbyname=TRUE in this transport. Other uses
229 of host_find_byname() use the default settings of RES_DEFNAMES
230 (qualify_single) but not RES_DNSRCH (search_parents).
232 PH/17 Applied (a modified version of) Nico Erfurth's patch to make
233 spool_read_header() do less string testing, by means of a preliminary
234 switch on the second character of optional "-foo" lines. (This is
235 overdue, caused by the large number of possibilities that now exist.
236 Originally there were few.) While I was there, I also converted the
237 str(n)cmp tests so they don't re-test the leading "-" and the first
238 character, in the hope this might squeeze out yet more improvement.
240 PH/18 Two problems with "group" syntax in header lines when verifying: (1) The
241 flag allowing group syntax was set by the header_syntax check but not
242 turned off, possible causing trouble later; (2) The flag was not being
243 set at all for the header_verify test, causing "group"-style headers to
244 be rejected. I have now set it in this case, and also caused header_
245 verify to ignore an empty address taken from a group. While doing this, I
246 came across some other cases where the code for allowing group syntax
247 while scanning a header line wasn't quite right (mostly, not resetting
248 the flag correctly in the right place). These bugs could have caused
249 trouble for malformed header lines. I hope it is now all correct.
251 PH/19 The functions {pwcheck,saslauthd}_verify_password() are always called
252 with the "reply" argument non-NULL. The code, however (which originally
253 came from elsewhere) had *some* tests for NULL when it wrote to *reply,
254 but it didn't always do it. This confused somebody who was copying the
255 code for some other use. I have removed all the tests.
257 PH/20 It was discovered that the GnuTLS code had support for RSA_EXPORT, a
258 feature that was used to support insecure browsers during the U.S. crypto
259 embargo. It requires special client support, and Exim is probably the
260 only MTA that supported it -- and would never use it because real RSA is
261 always available. This code has been removed, because it had the bad
262 effect of slowing Exim down by computing (never used) parameters for the
263 RSA_EXPORT functionality.
265 PH/21 On the advice of Timo Sirainen, added a check to the dovecot
266 authenticator to fail if there's a tab character in the incoming data
267 (there should never be unless someone is messing about, as it's supposed
268 to be base64-encoded). Also added, on Timo's advice, the "secured" option
269 if the connection is using TLS or if the remote IP is the same as the
270 local IP, and the "valid-client-cert option" if a client certificate has
273 PH/22 As suggested by Dennis Davis, added a server_condition option to *all*
274 authenticators. This can be used for authorization after authentication
275 succeeds. (In the case of plaintext, it servers for both authentication
278 PH/23 Testing for tls_required and lost_connection in a retry rule didn't work
279 if any retry times were supplied.
281 PH/24 Exim crashed if verify=helo was activated during an incoming -bs
282 connection, where there is no client IP address to check. In this
283 situation, the verify now always succeeds.
285 PH/25 Applied John Jetmore's -Mset patch.
287 PH/26 Added -bem to be like -Mset, but loading a message from a file.
289 PH/27 In a string expansion for a processed (not raw) header when multiple
290 headers of the same name were present, leading whitespace was being
291 removed from all of them, but trailing whitespace was being removed only
292 from the last one. Now trailing whitespace is removed from each header
293 before concatenation. Completely empty headers in a concatenation (as
296 PH/28 Fixed bug in backwards-compatibility feature of PH/09 (thanks to John
297 Jetmore). It would have mis-read ACL variables from pre-4.61 spool files.
299 PH/29 [Removed. This was a change that I later backed out, and forgot to
300 correct the ChangeLog entry (that I had efficiently created) before
301 committing the later change.]
303 PH/30 Exim was sometimes attempting to deliver messages that had suffered
304 address errors (4xx response to RCPT) over the same connection as other
305 messages routed to the same hosts. Such deliveries are always "forced",
306 so retry times are not inspected. This resulted in far too many retries
307 for the affected addresses. The effect occurred only when there were more
308 hosts than the hosts_max_try setting in the smtp transport when it had
309 the 4xx errors. Those hosts that it had tried were not added to the list
310 of hosts for which the message was waiting, so if all were tried, there
311 was no problem. Two fixes have been applied:
313 (i) If there are any address or message errors in an SMTP delivery, none
314 of the hosts (tried or untried) are now added to the list of hosts
315 for which the message is waiting, so the message should not be a
316 candidate for sending over the same connection that was used for a
317 successful delivery of some other message. This seems entirely
318 reasonable: after all the message is NOT "waiting for some host".
319 This is so "obvious" that I'm not sure why it wasn't done
320 previously. Hope I haven't missed anything, but it can't do any
321 harm, as the worst effect is to miss an optimization.
323 (ii) If, despite (i), such a delivery is accidentally attempted, the
324 routing retry time is respected, so at least it doesn't keep
325 hammering the server.
327 PH/31 Installed Andrew Findlay's patch to close the writing end of the socket
328 in ${readsocket because some servers need this prod.
330 PH/32 Added some extra debug output when updating a wait-xxx database.
332 PH/33 The hint "could be header name not terminated by colon", which has been
333 given for certain expansion errors for a long time, was not being given
334 for the ${if def:h_colon_omitted{... case.
336 PH/34 The spec says: "With one important exception, whenever a domain list is
337 being scanned, $domain contains the subject domain." There was at least
338 one case where this was not true.
340 PH/35 The error "getsockname() failed: connection reset by peer" was being
341 written to the panic log as well as the main log, but it isn't really
342 panic-worthy as it just means the connection died rather early on. I have
343 removed the panic log writing for the ECONNRESET error when getsockname()
346 PH/36 After a 4xx response to a RCPT error, that address was delayed (in queue
347 runs only) independently of the message's sender address. This meant
348 that, if the 4xx error was in fact related to the sender, a different
349 message to the same recipient with a different sender could confuse
350 things. In particualar, this can happen when sending to a greylisting
351 server, but other circumstances could also provoke similar problems.
352 I have changed the default so that the retry time for these errors is now
353 based a combination of the sender and recipient addresses. This change
354 can be overridden by setting address_retry_include_sender=false in the
357 PH/37 For LMTP over TCP/IP (the smtp transport), error responses from the
358 remote server are returned as part of bounce messages. This was not
359 happening for LMTP over a pipe (the lmtp transport), but now it is the
360 same for both kinds of LMTP.
362 PH/38 Despite being documented as not happening, Exim was rewriting addresses
363 in header lines that were in fact CNAMEs. This is no longer the case.
365 PH/39 If -R or -S was given with -q<time>, the effect of -R or -S was ignored,
366 and queue runs started by the daemon processed all messages. This has
367 been fixed so that -R and -S can now usefully be given with -q<time>.
369 PH/40 Import PCRE release 6.7 (fixes some bugs).
371 PH/41 Add bitwise logical operations to eval (courtesy Brad Jorsch).
373 PH/42 Give an error if -q is specified more than once.
375 PH/43 Renamed the variables $interface_address and $interface_port as
376 $received_ip_address and $received_port, to make it clear that these
377 values apply to message reception, and not to the outgoing interface when
378 a message is delivered. (The old names remain recognized, of course.)
380 PH/44 There was no timeout on the connect() call when using a Unix domain
381 socket in the ${readsocket expansion. There now is.
383 PH/45 Applied a modified version of Brad Jorsch's patch to allow "message" to
384 be meaningful with "accept".
386 SC/01 Eximstats V1.43
387 Bug fix for V1.42 with -h0 specified. Spotted by Chris Lear.
389 SC/02 Eximstats V1.44
390 Use a glob alias rather than an array ref in the generated
391 parser. This improves both readability and performance.
393 SC/03 Eximstats V1.45 (Marco Gaiarin / Steve Campbell)
394 Collect SpamAssassin and rejection statistics.
395 Don't display local sender or destination tables unless
396 there is data to show.
397 Added average volumes into the top table text output.
399 SC/04 Eximstats V1.46
400 Collect data on the number of addresses (recipients)
401 as well as the number of messages.
403 SC/05 Eximstats V1.47
404 Added 'Message too big' to the list of mail rejection
405 reasons (thanks to Marco Gaiarin).
407 SC/06 Eximstats V1.48
408 Mainlog lines which have GMT offsets and are too short to
409 have a flag are now skipped.
411 SC/07 Eximstats V1.49 (Alain Williams)
412 Added the -emptyok flag.
414 SC/08 Eximstats V1.50
415 Fixes for obtaining the IP address from reject messages.
417 JJ/03 exipick.20061117.2, made header handling as similar to exim as possible
418 (added [br]h_ prefixes, implemented RFC2047 decoding. Fixed
419 whitesspace changes from 4.64-PH/27
421 JJ/04 exipick.20061117.2, fixed format and added $message_headers_raw to
424 JJ/05 exipick.20061117.2, bug fixes (error out sooner when invalid criteria
425 are found, allow negative numbers in numeric criteria)
427 JJ/06 exipick.20061117.2, added new $message_body_missing variable
429 JJ/07 exipick.20061117.2, added $received_ip_address and $received_port
430 to match changes made in 4.64-PH/43
432 PH/46 Applied Jori Hamalainen's patch to add features to exiqsumm.
434 PH/47 Put in an explicit test for a DNS lookup of an address record where the
435 "domain" is actually an IP address, and force a failure. This locks out
436 those revolvers/nameservers that support "A-for-A" lookups, in
437 contravention of the specifications.
439 PH/48 When a host name was looked up from an IP address, and the subsequent
440 forward lookup of the name timed out, the host name was left in
441 $sender_host_name, contrary to the specification.
443 PH/49 Although default lookup types such as lsearch* or cdb*@ have always been
444 restricted to single-key lookups, Exim was not diagnosing an error if
445 * or *@ was used with a query-style lookup.
447 PH/50 Increased the value of DH_BITS in tls-gnu.c from 768 to 1024.
449 MH/01 local_scan ABI version incremented to 1.1. It should have been updated
450 long ago, but noone interested enough thought of it. Let's just say that
451 the "1.1" means that there are some new functions that weren't there at
452 some point in the past.
454 PH/51 Error processing for expansion failure of helo_data from an smtp
455 transport during callout processing was broken.
457 PH/52 Applied John Jetmore's patch to allow tls-on-connect and STARTTLS to be
458 tested/used via the -bh/-bhc/-bs options.
460 PH/53 Added missing "#include <time.h>" to pcre/pcretest.c (this was a PCRE
461 bug, fixed in subsequent PCRE releases).
463 PH/54 Applied Robert Bannocks' patch to avoid a problem with references that
464 arises when using the Solaris LDAP libraries (but not with OpenLDAP).
466 PH/55 Check for a ridiculously long file name in exim_dbmbuild.
472 SC/01 Use a glob alias rather than an array ref in eximstats generated
473 parser. This improves both readability and performance.
475 SC/02 Collect SpamAssassin and rejection statistics in eximstats.
476 Don't display local sender or destination tables in eximstats unless
477 there is data to show.
478 Added average volumes into the eximstats top table text output.
480 SC/03 Collect data on the number of addresses (recipients) as well
481 as the number of messages in eximstats.
483 TF/01 Correct an error in the documentation for the redirect router. Exim
484 does (usually) call initgroups() when daemonizing.
486 TF/02 Call initgroups() when dropping privilege in exim.c, so that Exim runs
487 with consistent privilege compared to when running as a daemon.
489 TF/03 Note in the spec that $authenticated_id is not set for local
490 submissions from trusted users.
492 TF/04 The ratelimit per_rcpt option now works correctly in acl_not_smtp.
493 Thanks to Dean Brooks <dean@iglou.com> for the patch.
495 TF/05 Make it easier to get SMTP authentication and TLS/SSL support working
496 by adding some example configuration directives to the default
497 configuration file. A little bit of work is required to uncomment the
498 directives and define how usernames and passwords are checked, but
499 there is now a framework to start from.
501 PH/01 Added #define LDAP_DEPRECATED 1 to ldap.c because some of the "old"
502 functions that Exim currently uses aren't defined in ldap.h for OpenLDAP
503 without this. I don't know how relevant this is to other LDAP libraries.
505 PH/02 Add the verb name to the "unknown ACL verb" error.
507 PH/03 Magnus Holmgren's patch for filter_prepend_home.
509 PH/03 Fixed Bugzilla #101: macro definition between ACLs doesn't work.
511 PH/04 Applied Magnus Holmgren's patch to fix Bugzilla #98: transport's home
512 directory not expanded when it should be if an expanded home directory
513 was set for the address (which is overridden by the transport).
515 PH/05 Applied Alex Kiernan's patch to fix Bugzilla #99: a problem with
518 PH/06 Added acl_not_smtp_start, based on Johannes Berg's patch, and set the
519 bit to forbid control=suppress_local_fixups in the acl_not_smtp ACL,
520 because it is too late at that time, and has no effect.
522 PH/07 Changed ${quote_pgsql to quote ' as '' instead of \' because of a
523 security issue with \' (bugzilla #107). I could not use the
524 PQescapeStringConn() function, because it needs a PGconn value as one of
527 PH/08 When testing addresses using -bt, indicate those final addresses that
528 are duplicates that would not cause an additional delivery. At least one
529 person was confused, thinking that -bt output corresponded to deliveries.
530 (Suppressing duplicates isn't a good idea as you lose the information
531 about possibly different redirections that led to the duplicates.)
533 PH/09 Applied patch from Erik to use select() instead of poll() in spam.c on
534 systems where poll() doesn't work, in particular OS X.
536 PH/10 Added more information to debugging output for retry time not reached.
538 PH/11 Applied patch from Arkadiusz Miskiewicz to apply a timeout to read
539 operations in malware.c.
541 PH/12 Applied patch from Magnus Holmgren to include the "h" tag in Domain Keys
544 PH/13 If write_rejectlog was set false when logging was sent to syslog with
545 syslog_duplication set false, log lines that would normally be written
546 both the the main log and to the reject log were not written to syslog at
549 PH/14 In the default configuration, change the use of "message" in ACL warn
550 statements to "add_header".
552 PH/15 Diagnose a filter syntax error for "seen", "unseen", or "noerror" if not
553 not followed by a command (e.g. "seen endif").
555 PH/16 Recognize SMTP codes at the start of "message" in ACLs and after :fail:
556 and :defer: in a redirect router. Add forbid_smtp_code to suppress the
559 PH/17 Added extra conditions to the default value of delay_warning_condition
563 { !eq{$h_list-id:$h_list-post:$h_list-subscribe:}{} } \
564 { match{$h_precedence:}{(?i)bulk|list|junk} } \
565 { match{$h_auto-submitted:}{(?i)auto-generated|auto-replied} } \
568 The Auto-Submitted: and various List- headers are standardised, whereas I
569 don't think Precedence: ever was.
571 PH/18 Refactored debugging code in route_finduser() to show more information,
572 in particular, the error code if getpwnam() issues one.
574 PH/19 Added PQsetClientEncoding(conn, "SQL_ASCII") to the pgsql code module.
575 This is apparently needed in addition to the PH/07 change above to avoid
576 any possible encoding problems.
578 PH/20 Perl can change the locale. Exim was resetting it after a ${perl call,
579 but not after initializing Perl.
581 PH/21 Added a call to PQsetNoticeProcessor() to catch pgsql "notices" and
582 output them only if debugging. By default they are written stderr,
583 apparently, which is not desirable.
585 PH/22 Added Alain Williams' LDAP patch to support setting REFERRALS=off on
588 JJ/01 exipick: added --reverse (and -R synonym), --random, --size, --sort and
591 JJ/02 exipick: rewrote --help documentation to hopefully make more clear.
593 PH/23 Made -oMaa and -oMt work with -bh and -bs to pretend the connection is
594 authenticated or an ident call has been made. Suppress the default
595 values for $authenticated_id and $authenticated_sender (but permit -oMai
596 and -oMas) when testing with -bh.
598 PH/24 Re-jigged the order of the tests in the default configuration so that the
599 tests for valid domains and recipients precede the DNS black list and CSA
600 tests, on the grounds that those ones are more expensive.
602 PH/25 Exim was not testing for a space following SMTP commands such as EHLO
603 that require one. Thus, EHLORHUBARB was interpreted as a valid command.
604 This bug exists in every version of Exim that I still have, right back to
607 PH/26 (n)wildlsearch lookups are documented as being done case-insensitively.
608 However, an attempt to turn on case-sensitivity in a regex key by
609 including (?-i) didn't work because the subject string was already
610 lowercased, and the effects were non-intuitive. It turns out that a
611 one-line patch can be used to allow (?-i) to work as expected.
617 TF/01 Fix the add_header change below (4.61 PH/55) which had a bug that (amongst
618 other effects) broke the use of negated acl sub-conditions.
620 PH/01 ${readsocket now supports Internet domain sockets (modified John Jetmore
623 PH/02 When tcp-wrappers is called from Exim, it returns only "deny" or "allow".
624 "Deny" causes Exim to reject the incoming connection with a 554 error.
625 Unfortunately, if there is a major crisis, such as a disk failure,
626 tcp-wrappers gives "deny", whereas what one would like would be some
627 kind of temporary error. A kludge has been added to help with this.
628 Before calling hosts_ctl(), errno is set zero. If the result is "deny", a
629 554 error is used if errno is still zero or contains ENOENT (which occurs
630 if either of the /etc/hosts.{allow,deny} files is missing). Otherwise, a
633 PH/03 Add -lutil to the default FreeBSD LIBS setting.
635 PH/04 Change PH/19 for 4.61 was too wide. It should not be applied to host
636 errors. Otherwise a message that provokes a temporary error (when other
637 messages do not) can cause a whole host to time out.
639 PH/05 Batch deliveries by appendfile and pipe transports did not work when the
640 addresses were routed directly to files or pipes from a redirect router.
641 File deliveries just didn't batch; pipe deliveries might have suffered
644 PH/06 A failure to get a lock for a hints database would erroneously always say
645 "Failed to get write lock", even when it was really a read lock.
647 PH/07 The appendfile transport was creating MBX lock files with a fixed mode
648 of 0600. This has been changed to use the value of the lockfile_mode
649 option (which defaults to 0600).
651 PH/08 Applied small patch from the Sieve maintainer.
653 PH/09 If maildir_quota_directory_regex was set to exclude (say) the .Trash
654 folder from quota calculations, a direct delivery into this folder messed
655 up the contents of the maildirsize file. This was because the regex was
656 used only to exclude .Trash (or whatever) when the size of the mailbox
657 was calculated. There was no check that a delivery was happening into an
658 excluded directory. This bug has been fixed by ignoring all quota
659 processing for deliveries into excluded directories.
661 PH/10 Added the maildirfolder_create_regex option to appendfile.
667 PH/01 The code for finding all the local interface addresses on a FreeBSD
668 system running IPv6 was broken. This may well have applied to all BSD
669 systems, as well as to others that have similar system calls. The broken
670 code found IPv4 interfaces correctly, but gave incorrect values for the
671 IPv6 interfaces. In particular, ::1 was not found. The effect in Exim was
672 that it would not match correctly against @[] and not recognize the IPv6
675 PH/02 The ipliteral router was not recognizing addresses of the form user@
676 [ipv6:....] because it didn't know about the "ipv6:" prefix.
678 PH/03 Added disable_ipv6.
680 PH/04 Changed $reply_address to use the raw form of the headers instead of the
681 decoded form, because it is most often used to construct To: headers
682 lines in autoreplies, and the decoded form may well be syntactically
683 invalid. However, $reply_address has leading white space removed, and all
684 newlines turned into spaces so that the autoreply transport does not
687 PH/05 If group was specified without a user on a router, and no group or user
688 was specified on a transport, the group from the router was ignored.
690 PH/06 Increased the number of ACL variables to 20 of each type, and arranged
691 for visible compile-time settings that can be used to change these
692 numbers, for those that want even more. Backwards compatibility with old
693 spool files has been maintained. However, going back to a previous Exim
694 release will lost any variables that are in spool files.
696 PH/07 Two small changes when running in the test harness: increase delay when
697 passing a TCP/IP connection to a new process, in case the original
698 process has to generate a bounce, and remove special handling of
699 127.0.0.2 (sic), which is no longer necessary.
701 PH/08 Changed debug output of dbfn_open() flags from numbers to names, so as to
702 be the same on different OS.
704 PH/09 Moved a debug statement in filter processing to avoid a race problem when
707 JJ/01 exipick: fixed bug where -b (brief) output option showed "Vars:"
708 whether --show-vars was specified or not
710 JJ/02 exipick: Added support for new ACL variable spool format introduced
713 PH/10 Fixed another bug related to PH/04 above: if an incoming message had a
714 syntactically invalid From: or Reply-to: line, and a filter used this to
715 generate an autoreply, and therefore failed to obtain an address for the
716 autoreply, Exim could try to deliver to a non-existent relative file
717 name, causing unrelated and misleading errors. What now happens is that
718 it logs this as a hard delivery error, but does not attempt to create a
721 PH/11 The exinext utility has a -C option for testing purposes, but although
722 the given file was scanned by exinext itself; it wasn't being passed on
723 when Exim was called.
725 PH/12 In the smtp transport, treat an explicit ECONNRESET error the same as
726 an end-of-file indication when reading a command response.
728 PH/13 Domain literals for IPv6 were not recognized unless IPv6 support was
729 compiled. In many other places in Exim, IPv6 addresses are always
730 recognized, so I have changed this. It also means that IPv4 domain
731 literals of the form [IPV4:n.n.n.n] are now always recognized.
733 PH/14 When a uid/gid is specified for the queryprogram router, it cannot be
734 used if the router is not running as root, for example, when verifying at
735 ACL time, or when using -bh. The debugging output from this situation was
736 non-existent - all you got was a failure to exec. I have made two
739 (a) Failures to set uid/gid, the current directory, or a process leader
740 in a subprocess such as that created by queryprogram now generate
741 suitable debugging ouput when -d is set.
743 (b) The queryprogram router detects when it is not running as root,
744 outputs suitable debugging information if -d is set, and then runs
745 the subprocess without attempting to change uid/gid.
747 PH/15 Minor change to Makefile for building test_host (undocumented testing
750 PH/16 As discussed on the list in Nov/Dec: Exim no longer looks at the
751 additional section of a DNS packet that returns MX or SRV records.
752 Instead, it always explicitly searches for A/AAAA records. This avoids
753 major problems that occur when a DNS server includes only records of one
754 type (A or AAAA) in an MX/SRV packet. A byproduct of this change has
755 fixed another bug: if SRV records were looked up and the corresponding
756 address records were *not* found in the additional section, the port
757 values from the SRV records were lost.
759 PH/17 If a delivery to a pipe, file, or autoreply was deferred, Exim was not
760 using the correct key (the original address) when searching the retry
761 rules in order to find which one to use for generating the retry hint.
763 PH/18 If quota_warn_message contains a From: header, Exim now refrains from
764 adding the default one. Similarly, if it contains a Reply-To: header, the
765 errors_reply_to option, if set, is not used.
767 PH/19 When calculating a retry time, Exim used to measure the "time since
768 failure" by looking at the "first failed" field in the retry record. Now
769 it does not use this if it is later than than the arrival time of the
770 message. Instead it uses the arrival time. This makes for better
771 behaviour in cases where some deliveries succeed, thus re-setting the
772 "first failed" field. An example is a quota failure for a huge message
773 when small messages continue to be delivered. Without this change, the
774 "time since failure" will always be short, possible causing more frequent
775 delivery attempts for the huge message than are intended.
776 [Note: This change was subsequently modified - see PH/04 for 4.62.]
778 PH/20 Added $auth1, $auth2, $auth3 to contain authentication data (as well as
779 $1, $2, $3) because the numerical variables can be reset during some
780 expansion items (e.g. "match"), thereby losing the authentication data.
782 PH/21 Make -bV show the size of off_t variables so that the test suite can
783 decide whether to run tests for quotas > 2G.
785 PH/22 Test the values given for quota, quota_filecount, quota_warn_threshold,
786 mailbox_size, and mailbox_filecount in the appendfile transport. If a
787 filecount value is greater than 2G or if a quota value is greater than 2G
788 on a system where the size of off_t is not greater than 4, a panic error
791 PH/23 When a malformed item such as 1.2.3/24 appears in a host list, it can
792 never match. The debug and -bh output now contains an explicit error
793 message indicating a malformed IPv4 address or mask.
795 PH/24 An host item such as 1.2.3.4/abc was being treated as the IP address
796 1.2.3.4 without a mask. Now it is not recognized as an IP address, and
799 PH/25 Do not write to syslog when running in the test harness. The only
800 occasion when this arises is a failure to open the main or panic logs
801 (for which there is an explicit test).
803 PH/26 Added the /no_tell option to "control=freeze".
805 PH/27 If a host name lookup failed very early in a connection, for example, if
806 the IP address matched host_lookup and the reverse lookup yielded a name
807 that did not have a forward lookup, an error message of the form "no IP
808 address found for host xxx.xxx.xxx (during SMTP connection from NULL)"
809 could be logged. Now it outputs the IP address instead of "NULL".
811 PH/28 An enabling patch from MH: add new function child_open_exim2() which
812 allows the sender and the authenticated sender to be set when
813 submitting a message from within Exim. Since child_open_exim() is
814 documented for local_scan(), the new function should be too.
816 PH/29 In GnuTLS, a forced expansion failure for tls_privatekey was not being
817 ignored. In both GnuTLS and OpenSSL, an expansion of tls_privatekey that
818 results in an empty string is now treated as unset.
820 PH/30 Fix eximon buffer overflow bug (Bugzilla #73).
822 PH/31 Added sender_verify_fail logging option.
824 PH/32 In November 2003, the code in Exim that added an empty Bcc: header when
825 needed by RFC 822 but not by RFC 2822 was commented out. I have now
826 tidied the source and removed it altogether.
828 PH/33 When a queue run was abandoned because the load average was too high, a
829 log line was always written; now it is written only if the queue_run log
830 selector is set. In addition, the log line for abandonment now contains
831 information about the queue run such as the pid. This is always present
832 in "start" and "stop" lines but was omitted from the "abandon" line.
834 PH/34 Omit spaces between a header name and the colon in the error message that
835 is given when verify = headers_syntax fails (if there are lots of them,
836 the message gets confusing).
838 PH/35 Change the default for dns_check_names_pattern to allow slashes within
839 names, as there are now some PTR records that contain slashes. This check
840 is only to protect against broken name servers that fall over on strange
841 characters, so the fact that it applies to all lookups doesn't matter.
843 PH/36 Now that the new test suite is complete, we can remove some of the
844 special code in Exim that was needed for the old test suite. For example,
845 sorting DNS records because real resolvers return them in an arbitrary
846 order. The new test suite's fake resolver always returns records in the
849 PH/37 When running in the test harness, use -odi for submitted messages (e.g.
850 bounces) except when queue_only is set, to avoid logging races between
851 the different processes.
853 PH/38 Panic-die if .include specifies a non-absolute path.
855 PH/39 A tweak to the "H" retry rule from its user.
857 JJ/03 exipick: Removed parentheses from 'next' and 'last' calls that specified
858 a label. They prevented compilation on older perls.
860 JJ/04 exipick: Refactored code to prevent implicit split to @_ which caused
861 a warning to be raised on newish perls.
863 JJ/05 exipick: Fixed bug where -bpc always showed a count of all messages
864 on queue. Changes to match documented behaviour of showing count of
865 messages matching specified criteria.
867 PH/40 Changed the default ident timeout from 30s to 5s.
869 PH/41 Added support for the use of login_cap features, on those BSD systems
870 that have them, for controlling the resources used by pipe deliveries.
872 PH/42 The content-scanning code uses fopen() to create files in which to put
873 message data. Previously it was not paying any attention to the mode of
874 the files. Exim runs with umask(0) because the rest of the code creates
875 files with open(), and sets the required mode explicitly. Thus, these
876 files were ending up world-writeable. This was not a big issue, because,
877 being within the spool directory, they were not world-accessible. I have
878 created a function called modefopen, which takes an additional mode
879 argument. It sets umask(777), creates the file, chmods it to the required
880 mode, then resets the umask. All the relevant calls to fopen() in the
881 content scanning code have been changed to use this function.
883 PH/43 If retry_interval_max is set greater than 24 hours, it is quietly reset
884 to 24 hours. This avoids potential overflow problems when processing G
885 and H retry rules. I suspect nobody ever tinkers with this value.
887 PH/44 Added STRIP_COMMAND=/usr/bin/strip to the FreeBSD Makefile.
889 PH/45 When the plaintext authenticator is running as a client, the server's
890 challenges are checked to ensure they are valid base64 strings. By
891 default, the authentication attempt is cancelled if an invalid string is
892 received. Setting client_ignore_invalid_base64 true ignores these errors.
893 The decoded challenge strings are now placed in $auth1, $auth2, etc. as
894 they are received. Thus, the responses can be made to depend on the
895 challenges. If an invalid string is ignored, an empty string is placed in
898 PH/46 Messages that are created by the autoreply transport now contains a
899 References: header, in accordance with RFCs 2822 and 3834.
901 PH/47 Added authenticated_sender_force to the smtp transport.
903 PH/48 The ${prvs expansion was broken on systems where time_t was long long.
905 PH/49 Installed latest patch from the Sieve maintainer.
907 PH/50 When an Exim quota was set without a file count quota, and mailbox_size
908 was also set, the appendfile transport was unnecessarily scanning a
909 directory of message files (e.g. for maildir delivery) to find the count
910 of files (along with the size), even though it did not need this
911 information. It now does the scan only if it needs to find either the
912 size of the count of files.
914 PH/51 Added ${time_eval: to convert Exim time strings into seconds.
916 PH/52 Two bugs concerned with error handling when the smtp transport is
919 (i) Exim was not creating retry information for temporary errors given
920 for individual recipients after the DATA command when the smtp transport
921 was used in LMTP mode. This meant that they could be retried too
922 frequently, and not timed out correctly.
924 (ii) Exim was setting the flag that allows error details to be returned
925 for LMTP errors on RCPT commands, but not for LMTP errors for individual
926 recipients that were returned after the DATA command.
928 PH/53 This is related to PH/52, but is more general: for any failing address,
929 when detailed error information was permitted to be returned to the
930 sender, but the error was temporary, then after the final timeout, only
931 "retry timeout exceeded" was returned. Now it returns the full error as
932 well as "retry timeout exceeded".
934 PH/54 Added control=allow_auth_unadvertised, as it seems there are clients that
935 do this, and (what is worse) MTAs that accept it.
937 PH/55 Added the add_header modified to ACLs. The use of "message" with "warn"
938 will now be deprecated.
940 PH/56 New os.c-cygwin from the Cygwin maintainer.
942 JJ/06 exipick: added --unsorted option to allow unsorted output in all output
943 formats (previously only available in exim formats via -bpr, -bpru,
944 and -bpra. Now also available in native and exiqgrep formats)
946 JJ/07 exipick: added --freeze and --thaw options to allow faster interaction
947 with very large, slow to parse queues
949 JJ/08 exipick: added ! as generic prefix to negate any criteria format
951 JJ/09 exipick: miscellaneous performance enhancements (~24% improvements)
953 PH/57 Tidies in SMTP dialogue display in debug output: (i) It was not showing
954 responses to authentication challenges, though it was showing the
955 challenges; (ii) I've removed the CR characters from the debug output for
958 PH/58 Allow for the insertion of a newline as well as a space when a string
959 is turned into more than one encoded-word during RFC 2047 encoding. The
960 Sieve code now uses this.
962 PH/59 Added the following errors that can be detected in retry rules: mail_4xx,
963 data_4xx, lost_connection, tls_required.
965 PH/60 When a VRFY deferred or FAILED, the log message rather than the user
966 message was being sent as an SMTP response.
968 PH/61 Add -l and -k options to exicyclog.
970 PH/62 When verifying, if an address was redirected to one new address, so that
971 verification continued, and the new address failed or deferred after
972 having set something in $address_data, the value of $address_data was not
973 passed back to the ACL. This was different to the case when no
974 redirection occurred. The value is now passed back in both cases.
976 PH/63 Changed the macro HAVE_LOGIN_CAP (see PH/41 for this release above) to
977 HAVE_SETCLASSRESOURCES because there are different APIs in use that all
978 use login_cap.h, so on its own it isn't the distinguishing feature. The
979 new name refers directly to the setclassresources() function.
981 PH/65 Added configuration files for NetBSD3.
983 PH/66 Updated OS/Makefile-HP-UX for gcc 4.1.0 with HP-UX 11.
985 PH/67 Fixed minor infelicity in the sorting of addresses to ensure that IPv6
986 is preferred over IPv4.
988 PH/68 The bounce_return_message and bounce_return_body options were not being
989 honoured for bounces generated during the reception of non-SMTP messages.
990 In particular, this applied to messages rejected by the ACL. This bug has
991 been fixed. However, if bounce_return_message is true and bounce_return_
992 body is false, the headers that are returned for a non-SMTP message
993 include only those that have been read before the error was detected.
994 (In the case of an ACL rejection, they have all been read.)
996 PH/69 The HTML version of the specification is now built in a directory called
997 spec_html instead of spec.html, because the latter looks like a path with
998 a MIME-type, and this confuses some software.
1000 PH/70 Catch two compiler warnings in sieve.c.
1002 PH/71 Fixed an obscure and subtle bug (thanks Alexander & Matthias). The
1003 function verify_get_ident() calls ip_connect() to connect a socket, but
1004 if the "connect()" function timed out, ip_connect() used to close the
1005 socket. However, verify_get_ident() also closes the socket later, and in
1006 between Exim writes to the log, which may get opened at this point. When
1007 the socket was closed in ip_connect(), the log could get the same file
1008 descriptor number as the socket. This naturally causes chaos. The fix is
1009 not to close the socket in ip_connect(); the socket should be closed by
1010 the function that creates it. There was only one place in the code where
1011 this was missing, in the iplookup router, which I don't think anybody now
1012 uses, but I've fixed it anyway.
1014 PH/72 Make dns_again_means_nonexist apply to lookups using gethostbyname() as
1015 well as to direct DNS lookups. Otherwise the handling of names in host
1016 lists is inconsistent and therefore confusing.
1022 PH/01 Two changes to the default runtime configuration:
1024 (1) Move the checks for relay_from_hosts and authenticated clients from
1025 after to before the (commented out) DNS black list checks.
1027 (2) Add control=submission to the relay_from_hosts and authenticated
1028 clients checks, on the grounds that messages accepted by these
1029 statements are most likely to be submissions.
1031 PH/02 Several tidies to the handling of ${prvs and ${prvscheck:
1033 (1) Generate an error if the third argument for the ${prvs expansion is
1036 (2) Treat a missing third argument of ${prvscheck as if it were an empty
1039 (3) Reset the variables that are obtained from the first argument of
1040 ${prvscheck and used in the second argument before leaving the code,
1041 because their memory is reclaimed, so using them afterwards may do
1044 (4) Tidy up the code for expanding the arguments of ${prvscheck one by
1045 one (it's much easier than Tom thought :-).
1047 (5) Because of (4), we can now allow for the use of $prvscheck_result
1048 inside the third argument.
1050 PH/03 For some reason, the default setting of PATH when running a command from
1051 a pipe transport was just "/usr/bin". I have changed it to
1054 PH/04 SUPPORT_TRANSLATE_IP_ADDRESS and MOVE_FROZEN_MESSAGES did not cause
1055 anything to be listed in the output from -bV.
1057 PH/05 When a filter generated an autoreply, the entire To: header line was
1058 quoted in the delivery log line, like this:
1060 => >A.N.Other <ano@some.domain> <original@ddress> ...
1062 This has been changed so that it extracts the operative address. There
1063 may be more than one such address. If so, they are comma-separated, like
1066 => >ano@some.domain,ona@other.domain <original@ddress> ...
1068 PH/06 When a client host used a correct literal IP address in a HELO or EHLO
1069 command, (for example, EHLO [1.2.3.4]) and the client's IP address was
1070 not being looked up in the rDNS to get a host name, Exim was showing the
1071 IP address twice in Received: lines, even though the IP addresses were
1072 identical. For example:
1074 Received: from [1.2.3.4] (helo=[1.2.3.4])
1076 However, if the real host name was known, it was omitting the HELO data
1077 if it matched the actual IP address. This has been tidied up so that it
1078 doesn't show the same IP address twice.
1080 PH/07 When both +timestamp and +memory debugging was on, the value given by
1081 $tod_xxx expansions could be wrong, because the tod_stamp() function was
1082 called by the debug printing, thereby overwriting the timestamp buffer.
1083 Debugging no longer uses the tod_stamp() function when +timestamp is set.
1085 PH/08 When the original message was included in an autoreply transport, it
1086 always said "this is a copy of the message, including all the headers",
1087 even if body_only or headers_only was set. It now gives an appropriate
1090 PH/09 Applied a patch from the Sieve maintainer which:
1092 o fixes some comments
1093 o adds the (disabled) notify extension core
1094 o adds some debug output for the result of if/elsif tests
1095 o points to the current vacation draft in the documentation
1096 and documents the missing references header update
1100 o fixes a bug in processing the envelope test (when testing
1101 multiple envelope elements, the last element determinted the
1104 PH/10 Exim was violating RFC 3834 ("Recommendations for Automatic Responses to
1105 Electronic Mail") by including:
1107 Auto-submitted: auto-generated
1109 in the messages that it generates (bounce messages and others, such as
1110 warnings). In the case of bounce messages for non-SMTP mesages, there was
1111 also a typo: it was using "Auto_submitted" (underscore instead of
1112 hyphen). Since every message generated by Exim is necessarily in response
1113 to another message, thes have all been changed to:
1115 Auto-Submitted: auto-replied
1117 in accordance with these statements in the RFC:
1119 The auto-replied keyword:
1121 - SHOULD be used on messages sent in direct response to another
1122 message by an automatic process,
1124 - MUST NOT be used on manually-generated messages,
1126 - MAY be used on Delivery Status Notifications (DSNs) and Message
1127 Disposition Notifications (MDNs),
1129 - MUST NOT be used on messages generated by automatic or periodic
1130 processes, except for messages which are automatic responses to
1133 PH/11 Added "${if def:sender_address {(envelope-from <$sender_address>)\n\t}}"
1134 to the default Received: header definition.
1136 PH/12 Added log selector acl_warn_skipped (default on).
1138 PH/13 After a successful wildlsearch lookup, discard the values of numeric
1139 variables because (a) they are in the wrong storage pool and (b) even if
1140 they were copied, it wouldn't work properly because of the caching.
1142 PH/14 Add check_rfc2047_length to disable enforcement of RFC 2047 length
1143 checking when decoding. Apparently there are clients that generate
1144 overlong encoded strings. Why am I not surprised?
1146 PH/15 If the first argument of "${if match_address" was not empty, but did not
1147 contain an "@" character, Exim crashed. Now it writes a panic log message
1148 and treats the condition as false.
1150 PH/16 In autoreply, treat an empty string for "once" the same as unset.
1152 PH/17 A further patch from the Sieve maintainer: "Introduce the new Sieve
1153 extension "envelope-auth". The code is finished and in agreement with
1154 other implementations, but there is no documentation so far and in fact,
1155 nobody wrote the draft yet. This extension is currently #undef'ed, thus
1156 not changing the active code.
1158 Print executed "if" and "elsif" statements when debugging is used. This
1159 helps a great deal to understand what a filter does.
1161 Document more things not specified clearly in RFC3028. I had all this
1162 sorted out, when out of a sudden new issues came to my mind. Oops."
1164 PH/18 Exim was not recognizing the "net-" search type prefix in match_ip lists
1167 PH/19 Exim expands the IPv6 address given to -bh to its full non-abbreviated
1168 canonical form (as documented). However, after a host name lookup from
1169 the IP address, check_host() was doing a simple string comparison with
1170 addresses acquired from the DNS when checking that the found name did
1171 have the original IP as one of its addresses. Since any found IPv6
1172 addresses are likely to be in abbreviated form, the comparison could
1173 fail. Luckily, there already exists a function for doing the comparison
1174 by converting both addresses to binary, so now that is used instead of
1175 the text comparison.
1177 PH/20 There was another similar case to PH/19, when a complete host name was
1178 given in a host list; looking up its IP address could give an abbreviated
1179 form, whereas the current host's name might or might not be abbreviated.
1180 The same fix has been applied.
1186 PH/01 The ${base62: operator adjusted itself to base 36 when BASE_62 was
1187 set to 36 (for Darwin and Cygwin), but the ${base62d: operator did not.
1190 PH/02 Two minor problems detected in Cygwin: the os.{c,h} files had lost */ on
1191 the CVS lines, and there was a missing #if HAVE_IPV6 in host.c.
1193 PH/03 Typo: missing ".o" in src/pcre/Makefile.
1195 PH/04 Tighten up "personal" tests: Instead of testing for any "List-"
1196 header line, restrict the check to what is listed in RFCs 2369 and 2929.
1197 Also, for "Auto-Submitted", treat anything other than "no" as
1198 non-personal, in accordance with RFC 3834. (Previously it treated
1199 anything starting "auto-" as non-personal.)
1201 TF/01 The control=submission/name=... option had a problem with syntax
1202 errors if the name included a slash character. The /name= option
1203 now slurps the rest of the string, so it can include any characters
1204 but it must come last in the list of options (after /sender_retain
1207 PH/05 Some modifications to the interface to the fake nameserver for the new
1215 TK/01 Added the "success_on_redirect" address verification option. See
1216 NewStuff for rationale and an example.
1218 PH/01 Added support for SQLite, basic code supplied by David Woodhouse.
1220 PH/02 Patch to exigrep to allow it to work on syslog lines.
1222 PH/03 When creating an mbox file for a virus/spam scan, use fseek() instead of
1223 fread() to skip over the body file's header line, because in Cygwin the
1224 header line is locked and is inaccessible.
1226 PH/04 Added $message_exim_id, ultimately to replace $message_id (they will both
1227 co-exist for some time) to make it clear that it is the Exim ID that is
1228 referenced, not the Message-ID: header line.
1230 PH/05 Replaced all Tom's calls to snprintf() with calls to the internal
1231 string_format() function, because snprintf() does not exist on all
1234 PH/06 The use of forbid_filter_existstest now also locks out the use of the
1235 ${stat: expansion item.
1237 PH/07 Changed "SMTP protocol violation: synchronization error" into "SMTP
1238 protocol synchronization error", to keep the pedants happy.
1240 PH/08 Arrange for USE_INET_NTOA_FIX to be set in config.h for AIX systems as
1241 well as for IRIX systems, when gcc is being used. See the host.c source
1244 PH/09 Installed latest Cygwin configuration files from the Cygwin maintainer.
1246 PH/10 Named domain lists were not working if used in a queue_smtp_domains
1249 PH/11 Added support for the IGNOREQUOTA extension to LMTP, both to the lmtp
1250 transport and to the smtp transport in LMTP mode.
1252 TK/02 Remove one case of BASE64 error detection FTTB (undocumented anyway).
1254 PH/12 There was a missing call to search_tidyup() before the fork() in rda.c to
1255 run a filter in a subprocess. This could lead to confusion in subsequent
1256 lookups in the parent process. There should also be a search_tidyup() at
1257 the end of the subprocess.
1259 PH/13 Previously, if "verify = helo" was set in an ACL, the condition was true
1260 only if the host matched helo_try_verify_hosts, which caused the
1261 verification to occur when the EHLO/HELO command was issued. The ACL just
1262 tested the remembered result. Now, if a previous verification attempt has
1263 not happened, "verify = helo" does it there and then.
1265 JJ/01 exipick: added $message_exim_id variable (see 4.53-PH/04)
1267 TK/03 Fix log output including CR from clamd.
1269 PH/14 A reference to $reply_address when Reply-to: was empty and From: did not
1270 exist provoked a memory error which could cause a segfault.
1272 PH/15 Installed PCRE 6.2
1274 PH/17 Defined BIND_8_COMPAT in the Darwin os.h file.
1276 PH/18 Reversed 4.52/PH/17 because the HP-UX user found it wasn't the cause
1277 of the problem. Specifically, suggested +O2 rather than +O1 for the
1280 PH/19 Added sqlite_lock_timeout option (David Woodhouse's patch).
1282 PH/20 If a delivery was routed to a non-standard port by means of an SRV
1283 record, the port was not correctly logged when the outgoing_port log
1284 selector was set (it logged the transort's default port).
1286 PH/21 Added support for host-specific ports to manualroute, queryprogram,
1287 fallback_hosts, and "hosts" in the smtp transport.
1289 PH/22 If the log selector "outgoing_port" is set, the port is now also given on
1290 host errors such as "Connection refused".
1292 PH/23 Applied a patch to fix problems with exim-4.52 while doing radius
1293 authentication with radiusclient 0.4.9:
1295 - Error returned from rc_read_config was caught wrongly
1296 - Username/password not passed on to radius server due to wrong length.
1298 The presumption is that some radiusclient API changes for 4.51/PH/17
1299 were not taken care of correctly. The code is still untested by me (my
1300 Linux distribution still has 0.3.2 of radiusclient), but it was
1301 contributed by a Radius user.
1303 PH/24 When doing a callout, the value of $domain wasn't set correctly when
1304 expanding the "port" option of the smtp transport.
1306 TK/04 MIME ACL: Fix buffer underrun that occurs when EOF condition is met
1307 while reading a MIME header. Thanks to Tom Hughes for a patch.
1309 PH/24 Include config.h inside local_scan.h so that configuration settings are
1312 PH/25 Make $smtp_command_argument available after all SMTP commands. This means
1313 that in an ACL for RCPT (for example), you can examine exactly what was
1316 PH/26 Exim was recognizing IPv6 addresses of the form [IPv6:....] in EHLO
1317 commands, but it was not correctly comparing the address with the actual
1318 client host address. Thus, it would show the EHLO address in Received:
1319 header lines when this was not necessary.
1321 PH/27 Added the % operator to ${eval:}.
1323 PH/28 Exim tries to create and chdir to its spool directory when it starts;
1324 it should be ignoring failures (because with -C, for example, it has lost
1325 privilege). It wasn't ignoring creation failures other than "already
1328 PH/29 Added "crypteq" to the list of supported features that Exim outputs when
1331 PH/30 Fixed (presumably very longstanding) bug in exim_dbmbuild: if it failed
1332 because an input line was too long, either on its own, or by virtue of
1333 too many continuations, the temporary file was not being removed, and the
1334 return code was incorrect.
1336 PH/31 Missing "BOOL" in function definition in filtertest.c.
1338 PH/32 Applied Sieve patches from the maintainer.
1340 TK/05 Domainkeys: Accomodate for a minor API change in libdomainkeys 0.67.
1342 PH/33 Added "verify = not_blind".
1344 PH/34 There are settings for CHOWN_COMMAND and MV_COMMAND that can be used in
1345 Local/Makefile (with some defaults set). These are used in built scripts
1346 such as exicyclog, but they have never been used in the exim_install
1347 script (though there are many overriding facilities there). I have
1348 arranged that the exim_install script now takes note of these two
1351 PH/35 Installed configuration files for Dragonfly.
1353 PH/36 When a locally submitted message by a trusted user did not contain a
1354 From: header, and the sender address was obtained from -f or from an SMTP
1355 MAIL command, and the trusted user did not use -F to supply a sender
1356 name, $originator_name was incorrectly used when constructing a From:
1357 header. Furthermore, $originator_name was used for submission mode
1358 messages from external hosts without From: headers in a similar way,
1359 which is clearly wrong.
1361 PH/37 Added control=suppress_local_fixups.
1363 PH/38 When log_selector = +received_sender was set, and the addition of the
1364 sender made the log line's construction buffer exactly full, or one byte
1365 less than full, an overflow happened when the terminating "\n" was
1368 PH/39 Added a new log selector, "unknown_in_list", which provokes a log entry
1369 when the result of a list match is failure because a DNS lookup failed.
1371 PH/40 RM_COMMAND is now used in the building process.
1373 PH/41 Added a "distclean" target to the top-level Makefile; it deletes all
1374 the "build-* directories that it finds.
1376 PH/42 (But a TF fix): In a domain list, Exim incorrectly matched @[] if the IP
1377 address in a domain literal was a prefix of an interface address.
1379 PH/43 (Again a TF fix): In the dnslookup router, do not apply widen_domains
1380 when verifying a sender address, unless rewrite_headers is false.
1382 PH/44 Wrote a long comment about why errors_to addresses are verified as
1383 recipients, not senders.
1385 TF/01 Add missing LIBS=-lm to OS/Makefile-OpenBSD which was overlooked when
1386 the ratelimit ACL was added.
1388 PH/45 Added $smtp_command for the full command (cf $smtp_command_argument).
1390 PH/46 Added extra information about PostgreSQL errors to the error string.
1392 PH/47 Added an interface to a fake DNS resolver for use by the new test suite,
1393 avoiding the need to install special zones in a real server. This is
1394 backwards compatible; if it can't find the fake resolver, it drops back.
1395 Thus, both old and new test suites can be run.
1397 TF/02 Added util/ratelimit.pl
1399 TF/03 Minor fix to the ratelimit code to improve its behaviour in case the
1400 clock is set back in time.
1402 TF/04 Fix the ratelimit support in exim_fixdb. Patch provided by Brian
1403 Candler <B.Candler@pobox.com>.
1405 TF/05 The fix for PH/43 was not completely correct; widen_domains is always
1406 OK for addresses that are the result of redirections.
1408 PH/48 A number of further additions for the benefit of the new test suite,
1409 including a fake gethostbyname() that interfaces to the fake DNS resolver
1412 TF/06 The fix for widen_domains has also been applied to qualify_single and
1413 search_parents which are the other dnslookup options that can cause
1416 PH/49 Michael Haardt's randomized retrying, but as a separate retry parameter
1419 PH/50 Make never_users, trusted_users, admin_groups, trusted_groups expandable.
1421 TF/07 Exim produced the error message "an SRV record indicated no SMTP
1422 service" if it encountered an MX record with an empty target hostname.
1423 The message is now "an MX or SRV record indicated no SMTP service".
1425 TF/08 Change PH/13 introduced the possibility that verify=helo may defer,
1426 if the DNS of the sending site is misconfigured. This is quite a
1427 common situation. This change restores the behaviour of treating a
1428 helo verification defer as a failure.
1430 PH/51 If self=fail was set on a router, the bounce message did not include the
1431 actual error message.
1437 TF/01 Added support for Client SMTP Authorization. See NewStuff for details.
1439 PH/01 When a transport filter timed out in a pipe delivery, and the pipe
1440 command itself ended in error, the underlying message about the transport
1441 filter timeout was being overwritten with the pipe command error. Now the
1442 underlying error message should be appended to the second error message.
1444 TK/01 Fix poll() being unavailable on Mac OSX 10.2.
1446 PH/02 Reduce the amount of output that "make" produces by default. Full output
1447 can still be requested.
1449 PH/03 The warning log line about a condition test deferring for a "warn" verb
1450 was being output only once per connection, rather than after each
1451 occurrence (because it was using the same function as for successful
1452 "warn" verbs). This seems wrong, so I have changed it.
1454 TF/02 Two buglets in acl.c which caused Exim to read a few bytes of memory that
1455 it should not have, which might have caused a crash in the right
1456 circumstances, but probably never did.
1458 PH/04 Installed a modified version of Tony Finch's patch to make submission
1459 mode fix the return path as well as the Sender: header line, and to
1460 add a /name= option so that you can make the user's friendly name appear
1463 TF/03 Added the control = fakedefer ACL modifier.
1465 TF/04 Added the ratelimit ACL condition. See NewStuff for details. Thanks to
1466 Mark Lowes for thorough testing.
1468 TK/02 Rewrote SPF support to work with libspf2 versions >1.2.0.
1470 TK/03 Merged latest SRS patch from Miles Wilton.
1472 PH/05 There's a shambles in IRIX6 - it defines EX_OK in unistd.h which conflicts
1473 with the definition in sysexits.h (which is #included earlier).
1474 Fortunately, Exim does not actually use EX_OK. The code used to try to
1475 preserve the sysexits.h value, by assumimg that macro definitions were
1476 scanned for macro replacements. I have been disabused of this notion,
1477 so now the code just undefines EX_OK before #including unistd.h.
1479 PH/06 There is a timeout for writing blocks of data, set by, e.g. data_timeout
1480 in the smtp transport. When a block could not be written in a single
1481 write() function, the timeout was being re-applied to each part-write.
1482 This seems wrong - if the receiver was accepting one byte at a time it
1483 would take for ever. The timeout is now adjusted when this happens. It
1484 doesn't have to be particularly precise.
1486 TK/04 Added simple SPF lookup method in EXPERIMENTAL_SPF. See NewStuff for
1487 details. Thanks to Chris Webb <chris@arachsys.com> for the patch!
1489 PH/07 Added "fullpostmaster" verify option, which does a check to <postmaster>
1490 without a domain if the check to <postmaster@domain> fails.
1492 SC/01 Eximstats: added -xls and the ability to specify output files
1493 (patch written by Frank Heydlauf).
1495 SC/02 Eximstats: use FileHandles for outputing results.
1497 SC/03 Eximstats: allow any combination of xls, txt, and html output.
1499 SC/04 Eximstats: fixed display of large numbers with -nvr option
1501 SC/05 Eximstats: fixed merging of reports with empty tables.
1503 SC/06 Eximstats: added the -include_original_destination flag
1505 SC/07 Eximstats: removed tabs and trailing whitespace.
1507 TK/05 Malware: Improve on aveserver error handling. Patch from Alex Miller.
1509 TK/06 MBOX spool code: Add real "From " MBOX separator line
1510 so the .eml file is really in mbox format (even though
1511 most programs do not really care). Patch from Alex Miller.
1513 TK/07 MBOX spool code: Add X-Envelope-From: and X-Envelope-To: headers.
1514 The latter is generated from $received_to and is only set if the
1515 message has one envelope recipient. SA can use these headers,
1516 obviously out-of-the-box. Patch from Alex Miller.
1518 PH/08 The ${def test on a variable was returning false if the variable's
1519 value was "0", contrary to what the specification has always said!
1520 The result should be true unless the variable is empty.
1522 PH/09 The syntax error of a character other than { following "${if
1523 def:variable_name" (after optional whitespace) was not being diagnosed.
1524 An expansion such as ${if def:sender_ident:{xxx}{yyy}} in which an
1525 accidental colon was present, for example, could give incorrect results.
1527 PH/10 Tidied the code in a number of places where the st_size field of a stat()
1528 result is used (not including appendfile, where other changes are about
1531 PH/11 Upgraded appendfile so that quotas larger than 2G are now supported.
1532 This involved changing a lot of size variables from int to off_t. It
1533 should work with maildirs and everything.
1535 TK/08 Apply fix provided by Michael Haardt to prevent deadlock in case of
1536 spamd dying while we are connected to it.
1538 TF/05 Fixed a ${extract error message typo reported by Jeremy Harris
1541 PH/12 Applied Alex Kiernan's patch for the API change for the error callback
1542 function for BDB 4.3.
1544 PH/13 Changed auto_thaw such that it does not apply to bounce messages.
1546 PH/14 Imported PCRE 6.0; this was more than just a trivial operation because
1547 the sources for PCRE have been re-arranged and more files are now
1550 PH/15 The code I had for printing potentially long long variables in PH/11
1551 above was not the best (it lost precision). The length of off_t variables
1552 is now inspected at build time, and an appropriate printing format (%ld
1553 or %lld) is chosen and #defined by OFF_T_FMT. We also define LONGLONG_T
1554 to be "long long int" or "long int". This is needed for the internal
1555 formatting function string_vformat().
1557 PH/16 Applied Matthew Newton's patch to exicyclog: "If log_file_path is set in
1558 the configuration file to be ":syslog", then the script "guesses" where
1559 the logs files are, rather than using the compiled in default. In our
1560 case the guess is not the same as the compiled default, so the script
1561 suddenly stopped working when I started to use syslog. The patch checks
1562 to see if log_file_path is "". If so, it attempts to read it from exim
1563 with no configuration file to get the compiled in version, before it
1564 falls back to the previous guessing code."
1566 TK/09 Added "prvs" and "prvscheck" expansion items. These help a lot with
1567 implementing BATV in an Exim configuration. See NewStuff for the gory
1570 PH/17 Applied Michael Haardt's patch for HP-UX, affecting only the os.h and
1571 Makefile that are specific to HP-UX.
1573 PH/18 If the "use_postmaster" option was set for a recipient callout together
1574 with the "random" option, the postmaster address was used as the MAIL
1575 FROM address for the random test, but not for the subsequent recipient
1576 test. It is now used for both.
1578 PH/19 Applied Michael Haardt's patch to update Sieve to RFC3028bis. "The
1579 patch removes a few documentation additions to RFC 3028, because the
1580 latest draft now contains them. It adds the new en;ascii-case comparator
1581 and a new error check for 8bit text in MIME parts. Comparator and
1582 require names are now matched exactly. I enabled the subaddress
1583 extension, but it is not well tested yet (read: it works for me)."
1585 PH/20 Added macros for time_t as for off_t (see PH/15 above) and used them to
1586 rework some of the code of TK/09 above to avoid the hardwired use of
1587 "%lld" and "long long". Replaced the call to snprintf() with a call to
1590 PH/21 Added some other messages to those in 4.51/PH/42, namely "All relevant MX
1591 records point to non-existent hosts", "retry timeout exceeded", and
1592 "retry time not reached for any host after a long failure period".
1594 PH/22 Fixed some oversights/typos causing bugs when Exim is compiled with
1595 experimental DomainKeys support:
1597 (1) The filter variables $n0-$n9 and $sn0-$sn9 were broken.
1598 (2) On an error such as an illegally used "control", the wrong name for
1599 the control was given.
1601 These problems did NOT occur unless DomainKeys support was compiled.
1603 PH/23 Added daemon_startup_retries and daemon_startup_sleep.
1605 PH/24 Added ${if match_ip condition.
1607 PH/25 Put debug statements on either side of calls to EXIM_DBOPEN() for hints
1608 databases so that it will be absolutely obvious if a crash occurs in the
1609 DB library. This is a regular occurrence (often caused by mis-matched
1612 PH/26 Insert a lot of missing (void) casts for functions such as chown(),
1613 chmod(), fcntl(), sscanf(), and other functions from stdio.h. These were
1614 picked up on a user's system that detects such things. There doesn't seem
1615 to be a gcc warning option for this - only an attribute that has to be
1616 put on the function's prototype. It seems that in Fedora Core 4 they have
1617 set this on a number of new functions. No doubt there will be more in due
1620 PH/27 If a dnslookup or manualroute router is set with verify=only, it need not
1621 specify a transport. However, if an address that was verified by such a
1622 router was the subject of a callout, Exim crashed because it tried to
1623 read the rcpt_include_affixes from the non-existent transport. Now it
1624 just assumes that the setting of that option is false. This bug was
1625 introduced by 4.51/PH/31.
1627 PH/28 Changed -d+all to exclude +memory, because that information is very
1628 rarely of interest, but it makes the output a lot bigger. People tend to
1629 do -d+all out of habit.
1631 PH/29 Removed support for the Linux-libc5 build, as it is obsolete and the
1632 code in os-type was giving problems when libc.so lives in lib64, like on
1635 PH/30 Exim's DNS code uses the original T_xxx names for DNS record times. These
1636 aren't the modern standard, and it seems that some systems' include files
1637 don't always have them. Exim was already checking for some of the newer
1638 ones like T_AAAA, and defining it itself. I've added checks for all the
1639 record types that Exim uses.
1641 PH/31 When using GnuTLS, if the parameters cache file did not exist, Exim was
1642 not automatically generating a new one, as it is supposed to. This
1643 prevented TLS from working. If the file did exist, but contained invalid
1644 data, a new version was generated, as expected. It was only the case of a
1645 non-existent file that was broken.
1647 TK/10 Domainkeys: Fix a bug in verification that caused a crash in conjunction
1648 with a change in libdomainkeys > 0.64.
1650 TK/11 Domainkeys: Change the logic how the "testing" policy flag is retrieved
1651 from DNS. If the selector record carries the flag, it now has
1652 precedence over the domain-wide flag.
1654 TK/12 Cleared some compiler warnings related to SPF, SRS and DK code.
1656 PH/32 In mua_wrapper mode, if an smtp transport configuration error (such as
1657 the use of a port name that isn't defined in /etc/services) occurred, the
1658 message was deferred as in a normal delivery, and thus remained on the
1659 spool, instead of being failed because of the mua_wrapper setting. This
1660 is now fixed, and I tidied up some of the mua_wrapper messages at the
1663 SC/08 Eximstats: whilst parsing the mainlog(s), store information about
1664 the messages in a hash of arrays rather than using individual hashes.
1665 This is a bit cleaner and results in dramatic memory savings, albeit
1666 at a slight CPU cost.
1668 SC/09 Eximstats: added the -show_rt<list> and the -show_dt<list> flags
1669 as requested by Marc Sherman.
1671 SC/10 Eximstats: added histograms for user specified patterns as requested
1674 SC/11 Eximstats: v1.43 - bugfix for pattern histograms with -h0 specified.
1676 PH/33 Patch from the Cygwin maintainer to add "b" to all occurences of
1677 fopen() in the content-scanning modules that did not already have it.
1683 TK/01 Added Yahoo DomainKeys support via libdomainkeys. See
1684 doc/experimental-spec.txt for details. (http://domainkeys.sf.net)
1686 TK/02 Fix ACL "control" statement not being available in MIME ACL.
1688 TK/03 Fix ACL "regex" condition not being available in MIME ACL.
1690 PH/01 Installed a patch from the Sieve maintainer that allows -bf to be used
1691 to test Sieve filters that use "vacation".
1693 PH/02 Installed a slightly modified version of Nikos Mavrogiannopoulos' patch
1694 that changes the way the GnuTLS parameters are stored in the cache file.
1695 The new format can be generated externally. For backward compatibility,
1696 if the data in the cache doesn't make sense, Exim assumes it has read an
1697 old-format file, and it generates new data and writes a new file. This
1698 means that you can't go back to an older release without removing the
1701 PH/03 A redirect router that has both "unseen" and "one_time" set does not
1702 work if there are any delivery delays because "one_time" forces the
1703 parent to be marked "delivered", so its unseen clone is never tried
1704 again. For this reason, Exim now forbids the simultaneous setting of
1707 PH/04 Change 4.11/85 fixed an obscure bug concerned with addresses that are
1708 redirected to themselves ("homonym" addresses). Read the long ChangeLog
1709 entry if you want to know the details. The fix, however, neglected to
1710 consider the case when local delivery batching is involved. The test for
1711 "previously delivered" was not happening when checking to see if an
1712 address could be batched with a previous (undelivered) one; under
1713 certain circumstances this could lead to multiple deliveries to the same
1716 PH/05 Renamed the macro SOCKLEN_T as EXIM_SOCKLEN_T because AIX uses SOCKLEN_T
1717 in its include files, and this causes problems building Exim.
1719 PH/06 A number of "verify =" ACL conditions have no options (e.g. verify =
1720 header_syntax) but Exim was just ignoring anything given after a slash.
1721 In particular, this caused confusion with an attempt to use "verify =
1722 reverse_host_lookup/defer_ok". An error is now given when options are
1723 supplied for verify items that do not have them. (Maybe reverse_host_
1724 lookup should have a defer_ok option, but that's a different point.)
1726 PH/07 Increase the size of the buffer for incoming SMTP commands from 512 (as
1727 defined by RFC 821) to 2048, because there were problems with some AUTH
1728 commands, and RFC 1869 says the size should be increased for extended
1729 SMTP commands that take arguments.
1731 PH/08 Added ${dlfunc dynamically loaded function for expansion (code from Tony
1734 PH/09 Previously, an attempt to use ${perl when it wasn't compiled gave an
1735 "unknown" error; now it says that the functionality isn't in the binary.
1737 PH/10 Added a nasty fudge to try to recognize and flatten LDAP passwords in
1738 an address' error message when a string expansion fails (syntax or
1739 whatever). Otherwise the password may appear in the log. Following change
1740 PH/42 below, there is no longer a chance of it appearing in a bounce
1743 PH/11 Installed exipick version 20050225.0 from John Jetmore.
1745 PH/12 If the last host in a fallback_hosts list was multihomed, only the first
1746 of its addresses was ever tried. (Bugzilla bug #2.)
1748 PH/13 If "headers_add" in a transport didn't end in a newline, Exim printed
1749 the result incorrectly in the debug output. (It correctly added a newline
1750 to what was transported.)
1752 TF/01 Added $received_time.
1754 PH/14 Modified the default configuration to add an acl_smtp_data ACL, with
1755 commented out examples of how to interface to a virus scanner and to
1756 SpamAssassin. Also added commented examples of av_scanner and
1757 spamd_address settings.
1759 PH/15 Further to TK/02 and TK/03 above, tidied up the tables of what conditions
1760 and controls are allowed in which ACLs. There were a couple of minor
1761 errors. Some of the entries in the conditions table (which is a table of
1762 where they are NOT allowed) were getting very unwieldy; rewrote them as a
1763 negation of where the condition IS allowed.
1765 PH/16 Installed updated OS/os.c-cygwin from the Cygwin maintainer.
1767 PH/17 The API for radiusclient changed at release 0.4.0. Unfortunately, the
1768 header file does not have a version number, so I've had to invent a new
1769 value for RADIUS_LIB_TYPE, namely "RADIUSCLIENTNEW" to request the new
1770 API. The code is untested by me (my Linux distribution still has 0.3.2 of
1771 radiusclient), but it was contributed by a Radius user.
1773 PH/18 Installed Lars Mainka's patch for the support of CRL collections in
1774 files or directories, for OpenSSL.
1776 PH/19 When an Exim process that is running as root has to create an Exim log
1777 file, it does so in a subprocess that runs as exim:exim so as to get the
1778 ownership right at creation (otherwise, other Exim processes might see
1779 the file with the wrong ownership). There was no test for failure of this
1780 fork() call, which would lead to the process getting stuck as it waited
1781 for a non-existent subprocess. Forks do occasionally fail when resources
1782 run out. I reviewed all the other calls to fork(); they all seem to check
1785 PH/20 When checking for unexpected SMTP input at connect time (before writing
1786 the banner), Exim was not dealing correctly with a non-positive return
1787 from the read() function. If the client had disconnected by this time,
1788 the result was a log entry for a synchronization error with an empty
1789 string after "input=" when read() returned zero. If read() returned -1
1790 (an event I could not check), uninitialized data bytes were printed.
1791 There were reports of junk text (parts of files, etc) appearing after
1794 PH/21 Added acl_not_smtp_mime to allow for MIME scanning for non-SMTP messages.
1796 PH/22 Added support for macro redefinition, and (re)definition in between
1797 driver and ACL definitions.
1799 PH/23 The cyrus_sasl authenticator was expanding server_hostname, but then
1800 forgetting to use the resulting value; it was using the unexpanded value.
1802 PH/24 The cyrus_sasl authenticator was advertising mechanisms for which it
1803 hadn't been configured. The fix is from Juergen Kreileder, who
1804 understands it better than I do:
1806 "Here's what I see happening with three configured cyrus_sasl
1807 authenticators configured (plain, login, cram-md5):
1809 On startup auth_cyrus_sasl_init() gets called for each of these.
1810 This means three calls to sasl_listmech() without a specified mech_list.
1811 => SASL tests which mechs of all available mechs actually work
1812 => three warnings about OTP not working
1813 => the returned list contains: plain, login, cram-md5, digest-md5, ...
1815 With the patch, sasl_listmech() also gets called three times. But now
1816 SASL's mech_list option is set to the server_mech specified in the the
1817 authenticator. Or in other words, the answer from sasl_listmech()
1818 gets limited to just the mech you're testing for (which is different
1820 => the return list contains just 'plain' or 'login', 'cram-md5' or
1821 nothing depending on the value of ob->server_mech.
1823 I've just tested the patch: Authentication still works fine,
1824 unavailable mechs specified in the exim configuration are still
1825 caught, and the auth.log warnings about OTP are gone."
1827 PH/25 When debugging is enabled, the contents of the command line are added
1828 to the debugging output, even when log_selector=+arguments is not
1831 PH/26 Change scripts/os-type so that when "uname -s" returns just "GNU", the
1832 answer is "GNU", and only if the return is "GNU/something" is the answer
1835 PH/27 $acl_verify_message is now set immediately after the failure of a
1836 verification in an ACL, and so is available in subsequent modifiers. In
1837 particular, the message can be preserved by coding like this:
1839 warn !verify = sender
1840 set acl_m0 = $acl_verify_message
1842 Previously, $acl_verify_message was set only while expanding "message"
1843 and "log_message" when a very denied access.
1845 PH/28 Modified OS/os.c-Linux with
1847 -#ifndef OS_LOAD_AVERAGE
1848 +#if !defined(OS_LOAD_AVERAGE) && defined(__linux__)
1850 to make Exim compile on kfreebsd-gnu. (I'm totally confused about the
1851 nomenclature these days.)
1853 PH/29 Installed patch from the Sieve maintainer that adds the options
1854 sieve_useraddress and sieve_subaddress to the redirect router.
1856 PH/30 In these circumstances:
1857 . Two addresses routed to the same list of hosts;
1858 . First host does not offer TLS;
1859 . First host accepts first address;
1860 . First host gives temporary error to second address;
1861 . Second host offers TLS and a TLS session is established;
1862 . Second host accepts second address.
1863 Exim incorrectly logged both deliveries with the TLS parameters (cipher
1864 and peerdn, if requested) that were in fact used only for the second
1867 PH/31 When doing a callout as part of verifying an address, Exim was not paying
1868 attention to any local part prefix or suffix that was matched by the
1869 router that accepted the address. It now behaves in the same way as it
1870 does for delivery: the affixes are removed from the local part unless
1871 rcpt_include_affixes is set on the transport.
1873 PH/32 Add the sender address, as F=<...>, to the log line when logging a
1874 timeout during the DATA phase of an incoming message.
1876 PH/33 Sieve envelope tests were broken for match types other than :is. I have
1877 applied a patch sanctioned by the Sieve maintainer.
1879 PH/34 Change 4.50/80 broke Exim in that it could no longer handle cases where
1880 the uid or gid is negative. A case of a negative gid caused this to be
1881 noticed. The fix allows for either to be negative.
1883 PH/35 ACL_WHERE_MIME is now declared unconditionally, to avoid too much code
1884 clutter, but the tables that are indexed by ACL_WHERE_xxx values had been
1887 PH/36 The change PH/12 above was broken. Fixed it.
1889 PH/37 Exim used to check for duplicate addresses in the middle of routing, on
1890 the grounds that routing the same address twice would always produce the
1891 same answer. This might have been true once, but it is certainly no
1892 longer true now. Routing a child address may depend on the previous
1893 routing that produced that child. Some complicated redirection strategies
1894 went wrong when messages had multiple recipients, and made Exim's
1895 behaviour dependent on the order in which the addresses were given.
1897 I have moved the duplicate checking until after the routing is complete.
1898 Exim scans the addresses that are assigned to local and remote
1899 transports, and removes any duplicates. This means that more work will be
1900 done, as duplicates will always all be routed, but duplicates are
1901 presumably rare, so I don't expect this is of any significance.
1903 For deliveries to pipes, files, and autoreplies, the duplicate checking
1904 still happens during the routing process, since they are not going to be
1907 PH/38 Installed a patch from Ian Freislich, with the agreement of Tom Kistner.
1908 It corrects a timeout issue with spamd. This is Ian's comment: "The
1909 background is that sometimes spamd either never reads data from a
1910 connection it has accepted, or it never writes response data. The exiscan
1911 spam.[ch] uses a 3600 second timeout on spamd socket reads, further, it
1912 blindly assumes that writes won't block so it may never time out."
1914 PH/39 Allow G after quota size as well as K and M.
1916 PH/40 The value set for $authenticated_id in an authenticator may not contain
1917 binary zeroes or newlines because the value is written to log lines and
1918 to spool files. There was no check on this. Now the value is run through
1919 the string_printing() function so that such characters are converted to
1920 printable escape sequences.
1922 PH/41 $message_linecount is a new variable that contains the total number of
1923 lines in the message. Compare $body_linecount, which is the count for the
1926 PH/42 Exim no longer gives details of delivery errors for specific addresses in
1927 bounce and delay warning messages, except in certain special cases, which
1930 (a) An SMTP error message from a remote host;
1931 (b) A message specified in a :fail: redirection;
1932 (c) A message specified in a "fail" command in a system filter;
1933 (d) A message specified in a FAIL return from the queryprogram router;
1934 (e) A message specified by the cannot_route_message router option.
1936 In these cases only, Exim does include the error details in bounce and
1937 warning messages. There are also a few cases where bland messages such
1938 as "unrouteable address" or "local delivery error" are given.
1940 PH/43 $value is now also set for the "else" part of a ${run expansion.
1942 PH/44 Applied patch from the Sieve maintainer: "The vacation draft is still
1943 being worked on, but at least Exim now implements the latest version to
1946 PH/45 In a pipe transport, although a timeout while waiting for the pipe
1947 process to complete was treated as a delivery failure, a timeout while
1948 writing the message to the pipe was logged, but erroneously treated as a
1949 successful delivery. Such timeouts include transport filter timeouts. For
1950 consistency with the overall process timeout, these timeouts are now
1951 treated as errors, giving rise to delivery failures by default. However,
1952 there is now a new Boolean option for the pipe transport called
1953 timeout_defer, which, if set TRUE, converts the failures into defers for
1954 both kinds of timeout. A transport filter timeout is now identified in
1957 PH/46 The "scripts/Configure-config.h" script calls "make" at one point. On
1958 systems where "make" and "gmake" are different, calling "gmake" at top
1959 level broke things. I've arranged for the value of $(MAKE) to be passed
1960 from the Makefile to this script so that it can call the same version of
1964 A note about Exim versions 4.44 and 4.50
1965 ----------------------------------------
1967 Exim 4.50 was meant to be the next release after 4.43. It contains a lot of
1968 changes of various kinds. As a consequence, a big documentation update was
1969 needed. This delayed the release for rather longer than seemed good, especially
1970 in the light of a couple of (minor) security issues. Therefore, the changes
1971 that fixed bugs were backported into 4.43, to create a 4.44 maintenance
1972 release. So 4.44 and 4.50 are in effect two different branches that both start
1975 I have left the 4.50 change log unchanged; it contains all the changes since
1976 4.43. The change log for 4.44 is below; many of its items are identical to
1977 those for 4.50. This seems to be the most sensible way to preserve the
1978 historical information.
1984 1. Minor wording change to the doc/README.SIEVE file.
1986 2. Change 4.43/35 introduced a bug: if quota_filecount was set, the
1987 computation of the current number of files was incorrect.
1989 3. Closing a stable door: arrange to panic-die if setitimer() ever fails. The
1990 bug fixed in 4.43/37 would have been diagnosed quickly if this had been in
1993 4. Give more explanation in the error message when the command for a transport
1994 filter fails to execute.
1996 5. There are several places where Exim runs a non-Exim command in a
1997 subprocess. The SIGUSR1 signal should be disabled for these processes. This
1998 was being done only for the command run by the queryprogram router. It is
1999 now done for all such subprocesses. The other cases are: ${run, transport
2000 filters, and the commands run by the lmtp and pipe transports.
2002 6. Added CONFIGURE_GROUP build-time option.
2004 7. Some older OS have a limit of 256 on the maximum number of file
2005 descriptors. Exim was using setrlimit() to set 1000 as a large value
2006 unlikely to be exceeded. Change 4.43/17 caused a lot of logging on these
2007 systems. I've change it so that if it can't get 1000, it tries for 256.
2009 8. "control=submission" was allowed, but had no effect, in a DATA ACL. This
2010 was an oversight, and furthermore, ever since the addition of extra
2011 controls (e.g. 4.43/32), the checks on when to allow different forms of
2012 "control" were broken. There should now be diagnostics for all cases when a
2013 control that does not make sense is encountered.
2015 9. Added the /retain_sender option to "control=submission".
2017 10. $recipients is now available in the predata ACL (oversight).
2019 11. Tidy the search cache before the fork to do a delivery from a message
2020 received from the command line. Otherwise the child will trigger a lookup
2021 failure and thereby defer the delivery if it tries to use (for example) a
2022 cached ldap connection that the parent has called unbind on.
2024 12. If verify=recipient was followed by verify=sender in a RCPT ACL, the value
2025 of $address_data from the recipient verification was clobbered by the
2026 sender verification.
2028 13. The value of address_data from a sender verification is now available in
2029 $sender_address_data in subsequent conditions in the ACL statement.
2031 14. Added forbid_sieve_filter and forbid_exim_filter to the redirect router.
2033 15. Added a new option "connect=<time>" to callout options, to set a different
2036 16. If FIXED_NEVER_USERS was defined, but empty, Exim was assuming the uid 0
2037 was its contents. (It was OK if the option was not defined at all.)
2039 17. A "Completed" log line is now written for messages that are removed from
2040 the spool by the -Mrm option.
2042 18. New variables $sender_verify_failure and $recipient_verify_failure contain
2043 information about exactly what failed.
2045 19. Added -dd to debug only the daemon process.
2047 20. Incorporated Michael Haardt's patch to ldap.c for improving the way it
2048 handles timeouts, both on the server side and network timeouts. Renamed the
2049 CONNECT parameter as NETTIMEOUT (but kept the old name for compatibility).
2051 21. The rare case of EHLO->STARTTLS->HELO was setting the protocol to "smtp".
2052 It is now set to "smtps".
2054 22. $host_address is now set to the target address during the checking of
2055 ignore_target_hosts.
2057 23. When checking ignore_target_hosts for an ipliteral router, no host name was
2058 being passed; this would have caused $sender_host_name to have been used if
2059 matching the list had actually called for a host name (not very likely,
2060 since this list is usually IP addresses). A host name is now passed as
2063 24. Changed the calls that set up the SIGCHLD handler in the daemon to use the
2064 code that specifies a non-restarting handler (typically sigaction() in
2065 modern systems) in an attempt to fix a rare and obscure crash bug.
2067 25. Narrowed the window for a race in the daemon that could cause it to ignore
2068 SIGCHLD signals. This is not a major problem, because they are used only to
2069 wake it up if nothing else does.
2071 26. A malformed maildirsize file could cause Exim to calculate negative values
2072 for the mailbox size or file count. Odd effects could occur as a result.
2073 The maildirsize information is now recalculated if the size or filecount
2076 27. Added HAVE_SYS_STATVFS_H to the os.h file for Linux, as it has had this
2077 support for a long time. Removed HAVE_SYS_VFS_H.
2079 28. Installed the latest version of exipick from John Jetmore.
2081 29. In an address list, if the pattern was not a regular expression, an empty
2082 subject address (from a bounce message) matched only if the pattern was an
2083 empty string. Non-empty patterns were not even tested. This was the wrong
2084 because it is perfectly reasonable to use an empty address as part of a
2085 database query. An empty address is now tested by patterns that are
2086 lookups. However, all the other forms of pattern expect the subject to
2087 contain a local part and a domain, and therefore, for them, an empty
2088 address still always fails if the pattern is not itself empty.
2090 30. Exim went into a mad DNS loop when attempting to do a callout where the
2091 host was specified on an smtp transport, and looking it up yielded more
2092 than one IP address.
2094 31. Re-factored the code for checking spool and log partition space into a
2095 function that finds that data and another that does the check. The former
2096 is then used to implement four new variables: $spool_space, $log_space,
2097 $spool_inodes, and $log_inodes.
2099 32. The RFC2047 encoding function was originally intended for short strings
2100 such as real names; it was not keeping to the 75-character limit for
2101 encoded words that the RFC imposes. It now respects the limit, and
2102 generates multiple encoded words if necessary. To be on the safe side, I
2103 have increased the buffer size for the ${rfc2047: expansion operator from
2106 33. It is now permitted to omit both strings after an "if" condition; if the
2107 condition is true, the result is "true". As before, when the second string
2108 is omitted, a false condition yields an empty string. This makes it less
2109 cumbersome to write custom ACL and router conditions.
2111 34. Failure to deliver a bounce message always caused it to be frozen, even if
2112 there was an errors_to setting on the router. The errors_to setting is now
2115 35. If an IPv6 address is given for -bh or -bhc, it is now converted to the
2116 canonical form (fully expanded) before being placed in
2117 $sender_host_address.
2119 36. The table in the code that translates DNS record types into text (T_A to
2120 "A" for instance) was missing entries for NS and CNAME. It is just possible
2121 that this could have caused confusion if both these types were looked up
2122 for the same domain, because the text type is used as part of Exim's
2123 per-process caching. But the chance of anyone hitting this buglet seems
2126 37. The dnsdb lookup has been extended in a number of ways.
2128 (1) There is a new type, "zns", which walks up the domain tree until it
2129 finds some nameserver records. It should be used with care.
2131 (2) There is a new type, "mxh", which is like "mx" except that it returns
2132 just the host names, not the priorities.
2134 (3) It is now possible to give a list of domains (or IP addresses) to be
2135 looked up. The behaviour when one of the lookups defers can be
2136 controlled by a keyword.
2138 (4) It is now possible to specify the separator character for use when
2139 multiple records are returned.
2141 38. The dnslists ACL condition has been extended: it is now possible to supply
2142 a list of IP addresses and/or domains to be looked up in a particular DNS
2145 39. Added log_selector=+queue_time_overall.
2147 40. When running the queue in the test harness, wait just a tad after forking a
2148 delivery process, to get repeatability of debugging output.
2150 41. Include certificate and key file names in error message when GnuTLS fails
2151 to set them up, because the GnuTLS error message doesn't include the name
2152 of the failing file when there is a problem reading it.
2154 42. Allow both -bf and -bF in the same test run.
2156 43. Did the same fix as 41 above for OpenSSL, which had the same infelicity.
2158 44. The "Exiscan patch" is now merged into the mainline Exim source.
2160 45. Sometimes the final signoff response after QUIT could fail to get
2161 transmitted in the non-TLS case. Testing !tls_active instead of tls_active
2162 < 0 before doing a fflush(). This bug looks as though it goes back to the
2163 introduction of TLS in release 3.20, but "sometimes" must have been rare
2164 because the tests only now provoked it.
2166 46. Reset the locale to "C" after calling embedded Perl, in case it was changed
2167 (this can affect the format of dates).
2169 47. exim_tidydb, when checking for the continued existence of a message for
2170 which it has found a message-specific retry record, was not finding
2171 messages that were in split spool directories. Consequently, it was
2172 deleting retry records that should have stayed in existence.
2174 48. Steve fixed some bugs in eximstats.
2176 49. The SPA authentication driver was not abandoning authentication and moving
2177 on to the next authenticator when an expansion was forced to fail,
2178 contradicting the general specification for all authenticators. Instead it
2179 was generating a temporary error. It now behaves as specified.
2181 50. The default ordering of permitted cipher suites for GnuTLS was pessimal
2182 (the order specifies the preference for clients). The order is now AES256,
2183 AES128, 3DES, ARCFOUR128.
2185 51. Small patch to Sieve code - explicitly set From: when generating an
2188 52. Exim crashed if a remote delivery caused a very long error message to be
2189 recorded - for instance if somebody sent an entire SpamAssassin report back
2190 as a large number of 550 error lines. This bug was coincidentally fixed by
2191 increasing the size of one of Exim's internal buffers (big_buffer) that
2192 happened as part of the Exiscan merge. However, to be on the safe side, I
2193 have made the code more robust (and fixed the comments that describe what
2196 53. Now that there can be additional text after "Completed" in log lines (if
2197 the queue_time_overall log selector is set), a one-byte patch to exigrep
2198 was needed to allow it to recognize "Completed" as not the last thing in
2201 54. The LDAP lookup was not handling a return of LDAP_RES_SEARCH_REFERENCE. A
2202 patch that reportedly fixes this has been added. I am not expert enough to
2203 create a test for it. This is what the patch creator wrote:
2205 "I found a little strange behaviour of ldap code when working with
2206 Windows 2003 AD Domain, where users was placed in more than one
2207 Organization Units. When I tried to give exim partial DN, the exit code
2208 of ldap_search was unknown to exim because of LDAP_RES_SEARCH_REFERENCE.
2209 But simultaneously result of request was absolutely normal ldap result,
2210 so I produce this patch..."
2212 Later: it seems that not all versions of LDAP support LDAP_RES_SEARCH_
2213 REFERENCE, so I have modified the code to exclude the patch when that macro
2216 55. Some experimental protocols are using DNS PTR records for new purposes. The
2217 keys for these records are domain names, not reversed IP addresses. The
2218 dnsdb PTR lookup now tests whether its key is an IP address. If not, it
2219 leaves it alone. Component reversal etc. now happens only for IP addresses.
2222 56. Improve error message when ldap_search() fails in OpenLDAP or Solaris LDAP.
2224 57. Double the size of the debug message buffer (to 2048) so that more of very
2225 long debug lines gets shown.
2227 58. The exicyclog utility now does better if the number of log files to keep
2228 exceeds 99. In this case, it numbers them 001, 002 ... instead of 01, 02...
2230 59. Two changes related to the smtp_active_hostname option:
2232 (1) $smtp_active_hostname is now available as a variable.
2233 (2) The default for smtp_banner uses $smtp_active_hostname instead
2234 of $primary_hostname.
2236 60. The host_aton() function is supposed to be passed a string that is known
2237 to be a valid IP address. However, in the case of IPv6 addresses, it was
2238 not checking this. This is a hostage to fortune. Exim now panics and dies
2239 if the condition is not met. A case was found where this could be provoked
2240 from a dnsdb PTR lookup with an IPv6 address that had more than 8
2241 components; fortuitously, this particular loophole had already been fixed
2242 by change 4.50/55 above.
2244 If there are any other similar loopholes, the new check in host_aton()
2245 itself should stop them being exploited. The report I received stated that
2246 data on the command line could provoke the exploit when Exim was running as
2247 exim, but did not say which command line option was involved. All I could
2248 find was the use of -be with a bad dnsdb PTR lookup, and in that case it is
2249 running as the user.
2252 61. There was a buffer overflow vulnerability in the SPA authentication code
2253 (which came originally from the Samba project). I have added a test to the
2254 spa_base64_to_bits() function which I hope fixes it.
2257 62. Configuration update for GNU/Hurd and variations. Updated Makefile-GNU and
2258 os.h-GNU, and added configuration files for GNUkFreeBSD and GNUkNetBSD.
2260 63. The daemon start-up calls getloadavg() while still root for those OS that
2261 need the first call to be done as root, but it missed one case: when
2262 deliver_queue_load_max is set with deliver_drop_privilege. This is
2263 necessary for the benefit of the queue runner, because there is no re-exec
2264 when deliver_drop_privilege is set.
2266 64. A call to exiwhat cut short delays set up by "delay" modifiers in ACLs.
2267 This has been fixed.
2269 65. Caching of lookup data for "hosts =" ACL conditions, when a named host list
2270 was in use, was not putting the data itself into the right store pool;
2271 consequently, it could be overwritten for a subsequent message in the same
2272 SMTP connection. (Fix 4.40/11 dealt with the non-cache case, but overlooked
2275 66. Added hosts_max_try_hardlimit to the smtp transport, default 50.
2277 67. The string_is_ip_address() function returns 0, 4, or 6, for "no an IP
2278 address", "IPv4 address", and "IPv6 address", respectively. Some calls of
2279 the function were treating the return as a boolean value, which happened to
2280 work because 0=false and not-0=true, but is not correct code.
2282 68. The host_aton() function was not handling scoped IPv6 addresses (those
2283 with, for example, "%eth0" on the end) correctly.
2285 69. Fixed some compiler warnings in acl.c for the bitmaps specified with
2286 negated items (that is, ~something) in unsigned ints. Some compilers
2287 apparently mutter when there is no cast.
2289 70. If an address verification called from an ACL failed, and did not produce a
2290 user-specific message (i.e. there was only a "system" message), nothing was
2291 put in $acl_verify_message. In this situation, it now puts the system
2294 71. Change 4.23/11 added synchronization checking at the start of an SMTP
2295 session; change 4.31/43 added the unwanted input to the log line - except
2296 that it did not do this in the start of session case. It now does.
2298 72. After a timeout in a callout SMTP session, Exim still sent a QUIT command.
2299 This is wrong and can cause the other end to generate a synchronization
2300 error if it is another Exim or anything else that does the synchronization
2301 check. A QUIT command is no longer sent after a timeout.
2303 73. $host_lookup_deferred has been added, to make it easier to detect DEFERs
2304 during host lookups.
2306 74. The defer_ok option of callout verification was not working if it was used
2307 when verifying addresses in header lines, that is, for this case:
2309 verify = header_sender/callout=defer_ok
2311 75. A backgrounded daemon closed stdin/stdout/stderr on entry; this meant that
2312 those file descriptors could be used for SMTP connections. If anything
2313 wrote to stderr (the example that came up was "warn" in embedded Perl), it
2314 could be sent to the SMTP client, causing chaos. The daemon now opens
2315 stdin, stdout, and stderr to /dev/null when it puts itself into the
2318 76. Arrange for output from Perl's "warn" command to be written to Exim's main
2319 log by default. The user can override this with suitable Perl magic.
2321 77. The use of log_message on a "discard" ACL verb, which is supposed to add to
2322 the log message when discard triggers, was not working for the DATA ACL or
2323 for the non-SMTP ACL.
2325 78. Error message wording change in sieve.c.
2327 79. If smtp_accept_max_per_host was set, the number of connections could be
2328 restricted to fewer than expected, because the daemon was trying to set up
2329 a new connection before checking whether the processes handling previous
2330 connections had finished. The check for completed processes is now done
2331 earlier. On busy systems, this bug wouldn't be noticed because something
2332 else would have woken the daemon, and it would have reaped the completed
2335 80. If a message was submitted locally by a user whose login name contained one
2336 or more spaces (ugh!), the spool file that Exim wrote was not re-readable.
2337 It caused a spool format error. I have fixed the spool reading code. A
2338 related problem was that the "from" clause in the Received: line became
2339 illegal because of the space(s). It is now covered by ${quote_local_part.
2341 81. Included the latest eximstats from Steve (adds average sizes to HTML Top
2344 82. Updated OS/Makefile-AIX as per message from Mike Meredith.
2346 83. Patch from Sieve maintainer to fix unterminated string problem in
2347 "vacation" handling.
2349 84. Some minor changes to the Linux configuration files to help with other
2350 OS variants using glibc.
2352 85. One more patch for Sieve to update vacation handling to latest spec.
2355 ----------------------------------------------------
2356 See the note above about the 4.44 and 4.50 releases.
2357 ----------------------------------------------------
2363 1. Change 4.43/35 introduced a bug that caused file counts to be
2364 incorrectly computed when quota_filecount was set in an appendfile
2367 2. Closing a stable door: arrange to panic-die if setitimer() ever fails. The
2368 bug fixed in 4.43/37 would have been diagnosed quickly if this had been in
2371 3. Give more explanation in the error message when the command for a transport
2372 filter fails to execute.
2374 4. There are several places where Exim runs a non-Exim command in a
2375 subprocess. The SIGUSR1 signal should be disabled for these processes. This
2376 was being done only for the command run by the queryprogram router. It is
2377 now done for all such subprocesses. The other cases are: ${run, transport
2378 filters, and the commands run by the lmtp and pipe transports.
2380 5. Some older OS have a limit of 256 on the maximum number of file
2381 descriptors. Exim was using setrlimit() to set 1000 as a large value
2382 unlikely to be exceeded. Change 4.43/17 caused a lot of logging on these
2383 systems. I've change it so that if it can't get 1000, it tries for 256.
2385 6. "control=submission" was allowed, but had no effect, in a DATA ACL. This
2386 was an oversight, and furthermore, ever since the addition of extra
2387 controls (e.g. 4.43/32), the checks on when to allow different forms of
2388 "control" were broken. There should now be diagnostics for all cases when a
2389 control that does not make sense is encountered.
2391 7. $recipients is now available in the predata ACL (oversight).
2393 8. Tidy the search cache before the fork to do a delivery from a message
2394 received from the command line. Otherwise the child will trigger a lookup
2395 failure and thereby defer the delivery if it tries to use (for example) a
2396 cached ldap connection that the parent has called unbind on.
2398 9. If verify=recipient was followed by verify=sender in a RCPT ACL, the value
2399 of $address_data from the recipient verification was clobbered by the
2400 sender verification.
2402 10. If FIXED_NEVER_USERS was defined, but empty, Exim was assuming the uid 0
2403 was its contents. (It was OK if the option was not defined at all.)
2405 11. A "Completed" log line is now written for messages that are removed from
2406 the spool by the -Mrm option.
2408 12. $host_address is now set to the target address during the checking of
2409 ignore_target_hosts.
2411 13. When checking ignore_target_hosts for an ipliteral router, no host name was
2412 being passed; this would have caused $sender_host_name to have been used if
2413 matching the list had actually called for a host name (not very likely,
2414 since this list is usually IP addresses). A host name is now passed as
2417 14. Changed the calls that set up the SIGCHLD handler in the daemon to use the
2418 code that specifies a non-restarting handler (typically sigaction() in
2419 modern systems) in an attempt to fix a rare and obscure crash bug.
2421 15. Narrowed the window for a race in the daemon that could cause it to ignore
2422 SIGCHLD signals. This is not a major problem, because they are used only to
2423 wake it up if nothing else does.
2425 16. A malformed maildirsize file could cause Exim to calculate negative values
2426 for the mailbox size or file count. Odd effects could occur as a result.
2427 The maildirsize information is now recalculated if the size or filecount
2430 17. Added HAVE_SYS_STATVFS_H to the os.h file for Linux, as it has had this
2431 support for a long time. Removed HAVE_SYS_VFS_H.
2433 18. Updated exipick to current release from John Jetmore.
2435 19. Allow an empty sender to be matched against a lookup in an address list.
2436 Previously the only cases considered were a regular expression, or an
2439 20. Exim went into a mad DNS lookup loop when doing a callout where the
2440 host was specified on the transport, if the DNS lookup yielded more than
2443 21. The RFC2047 encoding function was originally intended for short strings
2444 such as real names; it was not keeping to the 75-character limit for
2445 encoded words that the RFC imposes. It now respects the limit, and
2446 generates multiple encoded words if necessary. To be on the safe side, I
2447 have increased the buffer size for the ${rfc2047: expansion operator from
2450 22. Failure to deliver a bounce message always caused it to be frozen, even if
2451 there was an errors_to setting on the router. The errors_to setting is now
2454 23. If an IPv6 address is given for -bh or -bhc, it is now converted to the
2455 canonical form (fully expanded) before being placed in
2456 $sender_host_address.
2458 24. Updated eximstats to version 1.33
2460 25. Include certificate and key file names in error message when GnuTLS fails
2461 to set them up, because the GnuTLS error message doesn't include the name
2462 of the failing file when there is a problem reading it.
2464 26. Expand error message when OpenSSL has problems setting up cert/key files.
2467 27. Reset the locale to "C" after calling embedded Perl, in case it was changed
2468 (this can affect the format of dates).
2470 28. exim_tidydb, when checking for the continued existence of a message for
2471 which it has found a message-specific retry record, was not finding
2472 messages that were in split spool directories. Consequently, it was
2473 deleting retry records that should have stayed in existence.
2475 29. eximstats updated to version 1.35
2476 1.34 - allow eximstats to parse syslog lines as well as mainlog lines
2477 1.35 - bugfix such that pie charts by volume are generated correctly
2479 30. The SPA authentication driver was not abandoning authentication and moving
2480 on to the next authenticator when an expansion was forced to fail,
2481 contradicting the general specification for all authenticators. Instead it
2482 was generating a temporary error. It now behaves as specified.
2484 31. The default ordering of permitted cipher suites for GnuTLS was pessimal
2485 (the order specifies the preference for clients). The order is now AES256,
2486 AES128, 3DES, ARCFOUR128.
2488 31. Small patch to Sieve code - explicitly set From: when generating an
2491 32. Exim crashed if a remote delivery caused a very long error message to be
2492 recorded - for instance if somebody sent an entire SpamAssassin report back
2493 as a large number of 550 error lines. This bug was coincidentally fixed by
2494 increasing the size of one of Exim's internal buffers (big_buffer) that
2495 happened as part of the Exiscan merge. However, to be on the safe side, I
2496 have made the code more robust (and fixed the comments that describe what
2499 33. Some experimental protocols are using DNS PTR records for new purposes. The
2500 keys for these records are domain names, not reversed IP addresses. The
2501 dnsdb PTR lookup now tests whether its key is an IP address. If not, it
2502 leaves it alone. Component reversal etc. now happens only for IP addresses.
2505 34. The host_aton() function is supposed to be passed a string that is known
2506 to be a valid IP address. However, in the case of IPv6 addresses, it was
2507 not checking this. This is a hostage to fortune. Exim now panics and dies
2508 if the condition is not met. A case was found where this could be provoked
2509 from a dnsdb PTR lookup with an IPv6 address that had more than 8
2510 components; fortuitously, this particular loophole had already been fixed
2511 by change 4.50/55 or 4.44/33 above.
2513 If there are any other similar loopholes, the new check in host_aton()
2514 itself should stop them being exploited. The report I received stated that
2515 data on the command line could provoke the exploit when Exim was running as
2516 exim, but did not say which command line option was involved. All I could
2517 find was the use of -be with a bad dnsdb PTR lookup, and in that case it is
2518 running as the user.
2521 35. There was a buffer overflow vulnerability in the SPA authentication code
2522 (which came originally from the Samba project). I have added a test to the
2523 spa_base64_to_bits() function which I hope fixes it.
2526 36. The daemon start-up calls getloadavg() while still root for those OS that
2527 need the first call to be done as root, but it missed one case: when
2528 deliver_queue_load_max is set with deliver_drop_privilege. This is
2529 necessary for the benefit of the queue runner, because there is no re-exec
2530 when deliver_drop_privilege is set.
2532 37. Caching of lookup data for "hosts =" ACL conditions, when a named host list
2533 was in use, was not putting the data itself into the right store pool;
2534 consequently, it could be overwritten for a subsequent message in the same
2535 SMTP connection. (Fix 4.40/11 dealt with the non-cache case, but overlooked
2538 38. Sometimes the final signoff response after QUIT could fail to get
2539 transmitted in the non-TLS case. Testing !tls_active instead of tls_active
2540 < 0 before doing a fflush(). This bug looks as though it goes back to the
2541 introduction of TLS in release 3.20, but "sometimes" must have been rare
2542 because the tests only now provoked it.
2548 1. Fixed a longstanding but relatively impotent bug: a long time ago, before
2549 PIPELINING, the function smtp_write_command() used to return TRUE or FALSE.
2550 Now it returns an integer. A number of calls were still expecting a T/F
2551 return. Fortuitously, in all cases, the tests worked in OK situations,
2552 which is the norm. However, things would have gone wrong on any write
2553 failures on the smtp file descriptor. This function is used when sending
2554 messages over SMTP and also when doing verify callouts.
2556 2. When Exim is called to do synchronous delivery of a locally submitted
2557 message (the -odf or -odi options), it no longer closes stderr before doing
2560 3. Implemented the mua_wrapper option.
2562 4. Implemented mx_fail_domains and srv_fail_domains for the dnslookup router.
2564 5. Implemented the functions header_remove(), header_testname(),
2565 header_add_at_position(), and receive_remove_recipient(), and exported them
2568 6. If an ACL "warn" statement specified the addition of headers, Exim already
2569 inserted X-ACL-Warn: at the start if there was no header name. However, it
2570 was not making this test for the second and subsequent header lines if
2571 there were newlines in the string. This meant that an invalid header could
2572 be inserted if Exim was badly configured.
2574 7. Allow an ACL "warn" statement to add header lines at the start or after all
2575 the Received: headers, as well as at the end.
2577 8. Added the rcpt_4xx retry error code.
2579 9. Added postmaster_mailfrom=xxx to callout verification option.
2581 10. Added mailfrom=xxxx to the callout verification option, for verify=
2584 11. ${substr_1_:xxxx} and ${substr__3:xxxx} are now diagnosed as syntax errors
2585 (they previously behaved as ${substr_1_0:xxxx} and ${substr:_0_3:xxxx}).
2587 12. Inserted some casts to stop certain compilers warning when using pointer
2588 differences as field lengths or precisions in printf-type calls (mostly
2589 affecting debugging statements).
2591 13. Added optional readline() support for -be (dynamically loaded).
2593 14. Obscure bug fix: if a message error (e.g. 4xx to MAIL) happened within the
2594 same clock tick as a message's arrival, so that its received time was the
2595 same as the "first fail" time on the retry record, and that message
2596 remained on the queue past the ultimate address timeout, every queue runner
2597 would try a delivery (because it was past the ultimate address timeout) but
2598 after another failure, the ultimate address timeout, which should have then
2599 bounced the address, did not kick in. This was a "< instead of <=" error;
2600 in most cases the first failure would have been in the next clock tick
2601 after the received time, and all would be well.
2603 15. The special items beginning with @ in domain lists (e.g. @mx_any) were not
2604 being recognized when the domain list was tested by the match_domain
2605 condition in an expansion string.
2607 16. Added the ${str2b64: operator.
2609 17. Exim was always calling setrlimit() to set a large limit for the number of
2610 processes, without checking whether the existing limit was already
2611 adequate. (It did check for the limit on file descriptors.) Furthermore,
2612 errors from getrlimit() and setrlimit() were being ignored. Now they are
2613 logged to the main and panic logs, but Exim does carry on, to try to do its
2614 job under whatever limits there are.
2616 18. Imported PCRE 5.0.
2618 19. Trivial typo in log message " temporarily refused connection" (the leading
2621 20. If the log selector return_path_on_delivery was set and an address was
2622 redirected to /dev/null, the delivery process crashed because it assumed
2623 that a return path would always be set for a "successful" delivery. In this
2624 case, the whole delivery is bypassed as an optimization, and therefore no
2627 21. Internal re-arrangement: the function for sending a challenge and reading
2628 a response while authentication was assuming a zero-terminated challenge
2629 string. It's now changed to take a pointer and a length, to allow for
2630 binary data in such strings.
2632 22. Added the cyrus_sasl authenticator (code supplied by MBM).
2634 23. Exim was not respecting finduser_retries when seeking the login of the
2635 uid under which it was called; it was always trying 10 times. (The default
2636 setting of finduser_retries is zero.) Also, it was sleeping after the final
2637 failure, which is pointless.
2639 24. Implemented tls_on_connect_ports.
2641 25. Implemented acl_smtp_predata.
2643 26. If the domain in control=submission is set empty, Exim assumes that the
2644 authenticated id is a complete email address when it generates From: or
2645 Sender: header lines.
2647 27. Added "#define SOCKLEN_T int" to OS/os.h-SCO and OS/os.h-SCO_SV. Also added
2648 definitions to OS/Makefile-SCO and OS/Makefile-SCO_SV that put basename,
2649 chown and chgrp in /bin and hostname in /usr/bin.
2651 28. Exim was keeping the "process log" file open after each use, just as it
2652 does for the main log. This opens the possibility of it remaining open for
2653 long periods when the USR1 signal hits a daemon. Occasional processlog
2654 errors were reported, that could have been caused by this. Anyway, it seems
2655 much more sensible not to leave this file open at all, so that is what now
2658 29. The long-running daemon process does not normally write to the log once it
2659 has entered its main loop, and it closes the log before doing so. This is
2660 so that log files can straightforwardly be renamed and moved. However,
2661 there are a couple of unusual error situations where the daemon does write
2662 log entries, and I had neglected to close the log afterwards.
2664 30. The text of an SMTP error response that was received during a remote
2665 delivery was being truncated at 512 bytes. This is too short for some of
2666 the long messages that one sometimes sees. I've increased the limit to
2669 31. It is now possible to make retry rules that apply only when a message has a
2670 specific sender, in particular, an empty sender.
2672 32. Added "control = enforce_sync" and "control = no_enforce_sync". This makes
2673 it possible to be selective about when SMTP synchronization is enforced.
2675 33. Added "control = caseful_local_part" and "control = "caselower_local_part".
2677 32. Implemented hosts_connection_nolog.
2679 33. Added an ACL for QUIT.
2681 34. Setting "delay_warning=" to disable warnings was not working; it gave a
2684 35. Added mailbox_size and mailbox_filecount to appendfile.
2686 36. Added control = no_multiline_responses to ACLs.
2688 37. There was a bug in the logic of the code that waits for the clock to tick
2689 in the case where the clock went backwards by a substantial amount such
2690 that the microsecond fraction of "now" was more than the microsecond
2691 fraction of "then" (but the whole seconds number was less).
2693 38. Added support for the libradius Radius client library this is found on
2694 FreeBSD (previously only the radiusclient library was supported).
2700 1. When certain lookups returned multiple values in the form name=value, the
2701 quoting of the values was not always being done properly. Specifically:
2702 (a) If the value started with a double quote, but contained no whitespace,
2704 (b) If the value contained whitespace other than a space character (i.e.
2705 tabs or newlines or carriage returns) it was not quoted.
2706 This fix has been applied to the mysql and pgsql lookups by writing a
2707 separate quoting function and calling it from the lookup code. The fix
2708 should probably also be applied to nisplus, ibase and oracle lookups, but
2709 since I cannot test any of those, I have not disturbed their existing code.
2711 2. A hit in the callout cache for a specific address caused a log line with no
2712 reason for rejecting RCPT. Now it says "Previous (cached) callout
2713 verification failure".
2715 3. There was an off-by-one bug in the queryprogram router. An over-long
2716 return line was truncated at 256 instead of 255 characters, thereby
2717 overflowing its buffer with the terminating zero. As well as fixing this, I
2718 have increased the buffer size to 1024 (and made a note to document this).
2720 4. If an interrupt, such as the USR1 signal that is send by exiwhat, arrives
2721 when Exim is waiting for an SMTP response from a remote server, Exim
2722 restarts its select() call on the socket, thereby resetting its timeout.
2723 This is not a problem when such interrupts are rare. Somebody set up a cron
2724 job to run exiwhat every 2 minutes, which is less than the normal select()
2725 timeout (5 or 10 minutes). This meant that the select() timeout never
2726 kicked in because it was always reset. I have fixed this by comparing the
2727 time when an interrupt arrives with the time at the start of the first call
2728 to select(). If more time than the timeout has elapsed, the interrupt is
2729 treated as a timeout.
2731 5. Some internal re-factoring in preparation for the addition of Sieve
2732 extensions (by MH). In particular, the "personal" test is moved to a
2733 separate function, and given an option for scanning Cc: and Bcc: (which is
2734 not set for Exim filters).
2736 6. When Exim created an email address using the login of the caller as the
2737 local part (e.g. when creating a From: or Sender: header line), it was not
2738 quoting the local part when it contained special characters such as @.
2740 7. Installed new OpenBSD configuration files.
2742 8. Reworded some messages for syntax errors in "and" and "or" conditions to
2743 try to make them clearer.
2745 9. Callout options, other than the timeout value, were being ignored when
2746 verifying sender addresses in header lines. For example, when using
2748 verify = header_sender/callout=no_cache
2750 the cache was (incorrectly) being used.
2752 10. Added a missing instance of ${EXE} to the exim_install script; this affects
2753 only the Cygwin environment.
2755 11. When return_path_on_delivery was set as a log selector, if different remote
2756 addresses in the same message used different return paths and parallel
2757 remote delivery occurred, the wrong values would sometimes be logged.
2758 (Whenever a remote delivery process finished, the return path value from
2759 the most recently started remote delivery process was logged.)
2761 12. RFC 3848 specifies standard names for the "with" phrase in Received: header
2762 lines when AUTH and/or TLS are in use. This is the "received protocol"
2763 field. Exim used to use "asmtp" for authenticated SMTP, without any
2764 indication (in the protocol name) for TLS use. Now it follows the RFC and
2765 uses "esmtpa" if the connection is authenticated, "esmtps" if it is
2766 encrypted, and "esmtpsa" if it is both encrypted and authenticated. These
2767 names appear in log lines as well as in Received: header lines.
2769 13. Installed MH's patches for Sieve to add the "copy" and "vacation"
2770 extensions, and comparison tests, and to fix some bugs.
2772 14. Changes to the "personal" filter test:
2774 (1) The test was buggy in that it was just doing the equivalent of
2775 "contains" tests on header lines. For example, if a user's address was
2776 anne@some.where, the "personal" test would incorrectly be true for
2778 To: susanne@some.where
2780 This test is now done by extracting each address from the header in turn,
2781 and checking the entire address. Other tests that are part of "personal"
2782 are now done using regular expressions (for example, to check local parts
2783 of addresses in From: header lines).
2785 (2) The list of non-personal local parts in From: addresses has been
2786 extended to include "listserv", "majordomo", "*-request", and "owner-*",
2787 taken from the Sieve specification recommendations.
2789 (3) If the message contains any header line starting with "List-" it is
2790 treated as non-personal.
2792 (4) The test for "circular" in the Subject: header line has been removed
2793 because it now seems ill-conceived.
2795 15. Minor typos in src/EDITME comments corrected.
2797 16. Installed latest exipick from John Jetmore.
2799 17. If headers_add on a router specified a text string that was too long for
2800 string_sprintf() - that is, longer than 8192 bytes - Exim panicked. The use
2801 of string_sprintf() is now avoided.
2803 18. $message_body_size was not set (it was always zero) when running the DATA
2804 ACL and the local_scan() function.
2806 19. For the "mail" command in an Exim filter, no default was being set for
2807 the once_repeat time, causing a random time value to be used if "once" was
2808 specified. (If the value happened to be <= 0, no repeat happened.) The
2809 default is now 0s, meaning "never repeat". The "vacation" command was OK
2810 (its default is 7d). It's somewhat surprising nobody ever noticed this bug
2811 (I found it when inspecting the code).
2813 20. There is now an overall timeout for performing a callout verification. It
2814 defaults to 4 times the callout timeout, which applies to individual SMTP
2815 commands during the callout. The overall timeout applies when there is more
2816 than one host that can be tried. The timeout is checked before trying the
2817 next host. This prevents very long delays if there are a large number of
2818 hosts and all are timing out (e.g. when the network connections are timing
2819 out). The value of the overall timeout can be changed by specifying an
2820 additional sub-option for "callout", called "maxwait". For example:
2822 verify = sender/callout=5s,maxwait=20s
2824 21. Add O_APPEND to the open() call for maildirsize files (Exim already seeks
2825 to the end before writing, but this should make it even safer).
2827 22. Exim was forgetting that it had advertised PIPELINING for the second and
2828 subsequent messages on an SMTP connection. It was also not resetting its
2829 memory on STARTTLS and an internal HELO.
2831 23. When Exim logs an SMTP synchronization error within a session, it now
2832 records whether PIPELINING has been advertised or not.
2834 24. Added 3 instances of "(long int)" casts to time_t variables that were being
2835 formatted using %ld, because on OpenBSD (and perhaps others), time_t is int
2836 rather than long int.
2838 25. Installed the latest Cygwin configuration files from the Cygwin maintainer.
2840 26. Added the never_mail option to autoreply.
2846 1. A reorganization of the code in order to implement 4.40/8 caused a daemon
2847 crash if the getsockname() call failed; this can happen if a connection is
2848 closed very soon after it is established. The problem was simply in the
2849 order in which certain operations were done, causing Exim to try to write
2850 to the SMTP stream before it had set up the file descriptor. The bug has
2851 been fixed by making things happen in the correct order.
2857 1. If "drop" was used in a DATA ACL, the SMTP output buffer was not flushed
2858 before the connection was closed, thus losing the rejection response.
2860 2. Commented out the definition of SOCKLEN_T in os.h-SunOS5. It is needed for
2861 some early Solaris releases, but causes trouble in current releases where
2862 socklen_t is defined.
2864 3. When std{in,out,err} are closed, re-open them to /dev/null so that they
2867 4. Minor refactoring of os.c-Linux to avoid compiler warning when IPv6 is not
2870 5. Refactoring in expand.c to improve memory usage. Pre-allocate a block so
2871 that releasing the top of it at the end releases what was used for sub-
2872 expansions (unless the block got too big). However, discard this block if
2873 the first thing is a variable or header, so that we can use its block when
2874 it is dynamic (useful for very large $message_headers, for example).
2876 6. Lookups now cache *every* query, not just the most recent. A new, separate
2877 store pool is used for this. It can be recovered when all lookup caches are
2878 flushed. Lookups now release memory at the end of their result strings.
2879 This has involved some general refactoring of the lookup sources.
2881 7. Some code has been added to the store_xxx() functions to reduce the amount
2882 of flapping under certain conditions.
2884 8. log_incoming_interface used to affect only the <= reception log lines. Now
2885 it causes the local interface and port to be added to several more SMTP log
2886 lines, for example "SMTP connection from", and rejection lines.
2888 9. The Sieve author supplied some patches for the doc/README.SIEVE file.
2890 10. Added a conditional definition of _BSD_SOCKLEN_T to os.h-Darwin.
2892 11. If $host_data was set by virtue of a hosts lookup in an ACL, its value
2893 could be overwritten at the end of the current message (or the start of a
2894 new message if it was set in a HELO ACL). The value is now preserved for
2895 the duration of the SMTP connection.
2897 12. If a transport had a headers_rewrite setting, and a matching header line
2898 contained an unqualified address, that address was qualified, even if it
2899 did not match any rewriting rules. The underlying bug was that the values
2900 of the flags that permit the existence of unqualified sender and recipient
2901 addresses in header lines (set by {sender,recipient}_unqualified_hosts for
2902 non-local messages, and by -bnq for local messages) were not being
2903 preserved with the message after it was received.
2905 13. When Exim was logging an SMTP synchronization error, it could sometimes log
2906 "next input=" as part of the text comprising the host identity instead of
2907 the correct text. The code was using the same buffer for two different
2908 strings. However, depending on which order the printing function evaluated
2909 its arguments, the bug did not always show up. Under Linux, for example, my
2910 test suite worked just fine.
2912 14. Exigrep contained a use of Perl's "our" scoping after change 4.31/70. This
2913 doesn't work with some older versions of Perl. It has been changed to "my",
2914 which in any case is probably the better facility to use.
2916 15. A really picky compiler found some instances of statements for creating
2917 error messages that either had too many or two few arguments for the format
2920 16. The size of the buffer for calls to the DNS resolver has been increased
2921 from 1024 to 2048. A larger buffer is needed when performing PTR lookups
2922 for addresses that have a lot of PTR records. This alleviates a problem; it
2923 does not fully solve it.
2925 17. A dnsdb lookup for PTR records that receives more data than will fit in the
2926 buffer now truncates the list and logs the incident, which is the same
2927 action as happens when Exim is looking up a host name and its aliases.
2928 Previously in this situation something unpredictable would happen;
2929 sometimes it was "internal error: store_reset failed".
2931 18. If a server dropped the connection unexpectedly when an Exim client was
2932 using GnuTLS and trying to read a response, the client delivery process
2933 crashed while trying to generate an error log message.
2935 19. If a "warn" verb in an ACL added multiple headers to a message in a single
2936 string, for example:
2938 warn message = H1: something\nH2: something
2940 the text was added as a single header line from Exim's point of view
2941 though it ended up OK in the delivered message. However, searching for the
2942 second and subsequent header lines using $h_h2: did not work. This has been
2943 fixed. Similarly, if a system filter added multiple headers in this way,
2944 the routers could not see them.
2946 20. Expanded the error message when iplsearch is called with an invalid key to
2947 suggest using net-iplsearch in a host list.
2949 21. When running tests using -bh, any delays imposed by "delay" modifiers in
2950 ACLs are no longer actually imposed (and a message to that effect is
2953 22. If a "gecos" field in a passwd entry contained escaped characters, in
2954 particular, if it contained a \" sequence, Exim got it wrong when building
2955 a From: or a Sender: header from that name. A second bug also caused
2956 incorrect handling when an unquoted " was present following a character
2957 that needed quoting.
2959 23. "{crypt}" as a password encryption mechanism for a "crypteq" expansion item
2960 was not being matched caselessly.
2962 24. Arranged for all hyphens in the exim.8 source to be escaped with
2965 25. Change 16 of 4.32, which reversed 71 or 4.31 didn't quite do the job
2966 properly. Recipient callout cache records were still being keyed to include
2967 the sender, even when use_sender was set false. This led to far more
2968 callouts that were necessary. The sender is no longer included in the key
2969 when use_sender is false.
2971 26. Added "control = submission" modifier to ACLs.
2973 27. Added the ${base62d: operator to decode base 62 numbers.
2975 28. dnsdb lookups can now access SRV records.
2977 29. CONFIGURE_OWNER can be set at build time to define an alternative owner for
2978 the configuration file.
2980 30. The debug message "delivering xxxxxx-xxxxxx-xx" is now output in verbose
2981 (-v) mode. This makes the output for a verbose queue run more intelligible.
2983 31. Added a use_postmaster feature to recipient callouts.
2985 32. Added the $body_zerocount variable, containing the number of binary zero
2986 bytes in the message body.
2988 33. The time of last modification of the "new" subdirectory is now used as the
2989 "mailbox time last read" when there is a quota error for a maildir
2992 34. Added string comparison operators lt, lti, le, lei, gt, gti, ge, gei.
2994 35. Added +ignore_unknown as a special item in host lists.
2996 36. Code for decoding IPv6 addresses in host lists is now included, even if
2997 IPv6 support is not being compiled. This fixes a bug in which an IPv6
2998 address was recognized as an IP address, but was then not correctly decoded
2999 into binary, causing unexpected and incorrect effects when compared with
3006 1. Very minor rewording of debugging text in manualroute to say "list of
3007 hosts" instead of "hostlist".
3009 2. If verify=header_syntax was set, and a header line with an unqualified
3010 address (no domain) and a large number of spaces between the end of the
3011 name and the colon was received, the reception process suffered a buffer
3012 overflow, and (when I tested it) crashed. This was caused by some obsolete
3013 code that should have been removed. The fix is to remove it!
3015 3. When running in the test harness, delay a bit after writing a bounce
3016 message to get a bit more predictability in the log output.
3018 4. Added a call to search_tidyup() just before forking a reception process. In
3019 theory, someone could use a lookup in the expansion of smtp_accept_max_
3020 per_host which, without the tidyup, could leave open a database connection.
3022 5. Added the variables $recipient_data and $sender_data which get set from a
3023 lookup success in an ACL "recipients" or "senders" condition, or a router
3024 "senders" option, similar to $domain_data and $local_part_data.
3026 6. Moved the writing of debug_print from before to after the "senders" test
3029 7. Change 4.31/66 (moving the time when the Received: is generated) caused
3030 problems for message scanning, either using a data ACL, or using
3031 local_scan() because the Received: header was not generated till after they
3032 were called (in order to set the time as the time of reception completion).
3033 I have revised the way this works. The header is now generated after the
3034 body is received, but before the ACL or local_scan() are called. After they
3035 are run, the timestamp in the header is updated.
3041 1. Change 4.24/6 introduced a bug because the SIGALRM handler was disabled
3042 before starting a queue runner without re-exec. This happened only when
3043 deliver_drop_privilege was set or when the Exim user was set to root. The
3044 effect of the bug was that timeouts during subsequent deliveries caused
3045 crashes instead of being properly handled. The handler is now left at its
3046 default (and expected) setting.
3048 2. The other case in which a daemon avoids a re-exec is to deliver an incoming
3049 message, again when deliver_drop_privilege is set or Exim is run as root.
3050 The bug described in (1) was not present in this case, but the tidying up
3051 of the other signals was missing. I have made the two cases consistent.
3053 3. The ignore_target_hosts setting on a manualroute router was being ignored
3054 for hosts that were looked up using the /MX notation.
3056 4. Added /ignore=<ip list> feature to @mx_any, @mx_primary, and @mx_secondary
3059 5. Change 4.31/55 was buggy, and broke when there was a rewriting rule that
3060 operated on the sender address. After changing the $sender_address to <>
3061 for the sender address verify, Exim was re-instated it as the original
3062 (before rewriting) address, but remembering that it had rewritten it, so it
3063 wasn't rewriting it again. This bug also had the effect of breaking the
3064 sender address verification caching when the sender address was rewritten.
3066 6. The ignore_target_hosts option was being ignored by the ipliteral router.
3067 This has been changed so that if the ip literal address matches
3068 ignore_target_hosts, the router declines.
3070 7. Added expansion conditions match_domain, match_address, and match_local_
3071 part (NOT match_host).
3073 8. The placeholder for the Received: header didn't have a length field set.
3075 9. Added code to Exim itself and to exim_lock to test for a specific race
3076 condition that could lead to file corruption when using MBX delivery. The
3077 issue is with the lockfile that is created in /tmp. If this file is removed
3078 after a process has opened it but before that process has acquired a lock,
3079 there is the potential for a second process to recreate the file and also
3080 acquire a lock. This could lead to two Exim processes writing to the file
3081 at the same time. The added code performs the same test as UW imapd; it
3082 checks after acquiring the lock that its file descriptor still refers to
3083 the same named file.
3085 10. The buffer for building added header lines was of fixed size, 8192 bytes.
3086 It is now parameterized by HEADER_ADD_BUFFER_SIZE and this can be adjusted
3089 11. Added the smtp_active_hostname option. If used, this will typically be made
3090 to depend on the incoming interface address. Because $interface_address is
3091 not set up until the daemon has forked a reception process, error responses
3092 that can happen earlier (such as "too many connections") no longer contain
3095 12. If an expansion in a condition on a "warn" statement fails because a lookup
3096 defers, the "warn" statement is abandoned, and the next ACL statement is
3097 processed. Previously this caused the whole ACL to be aborted.
3099 13. Added the iplsearch lookup type.
3101 14. Added ident_timeout as a log selector.
3103 15. Added tls_certificate_verified as a log selector.
3105 16. Added a global option tls_require_ciphers (compare the smtp transport
3106 option of the same name). This controls incoming TLS connections.
3108 17. I finally figured out how to make tls_require_ciphers do a similar thing
3109 in GNUtls to what it does in OpenSSL, that is, set up an appropriate list
3110 before starting the TLS session.
3112 18. Tabs are now shown as \t in -bP output.
3114 19. If the log selector return_path_on_delivery was set, Exim crashed when
3115 bouncing a message because it had too many Received: header lines.
3117 20. If two routers both had headers_remove settings, and the first one included
3118 a superfluous trailing colon, the final name in the first list and the
3119 first name in the second list were incorrectly joined into one item (with a
3120 colon in the middle).
3126 1. Added -C and -D options to the exinext utility, mainly to make it easier
3127 to include in the automated testing, but these could be helpful when
3128 multiple configurations are in use.
3130 2. The exinext utility was not formatting the output nicely when there was
3131 an alternate port involved in the retry record key, nor when there was a
3132 message id as well (for retries that were specific to a specific message
3133 and a specific host). It was also confused by IPv6 addresses, because of
3134 the additional colons they contain. I have fixed the IPv4 problem, and
3135 patched it up to do a reasonable job for IPv6.
3137 3. When there is an error after a MAIL, RCPT, or DATA SMTP command during
3138 delivery, the log line now contains "pipelined" if PIPELINING was used.
3140 4. An SMTP transport process used to panic and die if the bind() call to set
3141 an explicit outgoing interface failed. This has been changed; it is now
3142 treated in the same way as a connect() failure.
3144 5. A reference to $sender_host_name in the part of a conditional expansion
3145 that was being skipped was still causing a DNS lookup. This no longer
3148 6. The def: expansion condition was not recognizing references to header lines
3149 that used bh_ and bheader_.
3151 7. Added the _cache feature to named lists.
3153 8. The code for checking quota_filecount in the appendfile transport was
3154 allowing one more file than it should have been.
3156 9. For compatibility with Sendmail, the command line option
3164 and sets the incoming protocol and host name (for trusted callers). The
3165 host name and its colon can be omitted when only the protocol is to be set.
3166 Note the Exim already has two private options, -pd and -ps, that refer to
3167 embedded Perl. It is therefore impossible to set a protocol value of "d" or
3168 "s", but I don't think that's a major issue.
3170 10. A number of refactoring changes to the code, none of which should affect
3173 (a) The number of logging options was getting close to filling up the
3174 32-bit word that was used as a bit map. I have split them into two classes:
3175 those that are passed in the argument to log_write(), and those that are
3176 only ever tested independently outside of that function. These are now in
3177 separate 32-bit words, so there is plenty of room for expansion again.
3178 There is no change in the user interface or the logging behaviour.
3180 (b) When building, for example, log lines, the code previously used a
3181 macro that called string_cat() twice, in order to add two strings. This is
3182 not really sufficiently general. Furthermore, there was one instance where
3183 it was actually wrong because one of the argument was used twice, and in
3184 one call a function was used. (As it happened, calling the function twice
3185 did not affect the overall behaviour.) The macro has been replaced by a
3186 function that can join an arbitrary number of extra strings onto a growing
3189 (c) The code for expansion conditions now uses a table and a binary chop
3190 instead of a serial search (which was left over from when there were very
3191 few conditions). Also, it now recognizes conditions like "pam" even when
3192 the relevant support is not compiled in: a suitably worded error message is
3193 given if an attempt is made to use such a condition.
3195 11. Added ${time_interval:xxxxx}.
3197 12. A bug was causing one of the ddress fields not to be passed back correctly
3198 from remote delivery subprocesses. The field in question was not being
3199 subsequently used, so this caused to problems in practice.
3201 13. Added new log selectors queue_time and deliver_time.
3203 14. Might have fixed a bug in maildirsizefile handling that threw up
3204 "unexpected character" debug warnings, and recalculated the data
3205 unnecessarily. In any case, I expanded the warning message to give more
3208 15. Added the message "Restricted characters in address" to the statements in
3209 the default ACL that block characters like @ and % in local parts.
3211 16. Change 71 for release 4.31 proved to be much less benign that I imagined.
3212 Three changes have been made:
3214 (a) There was a serious bug; a negative response to MAIL caused the whole
3215 recipient domain to be cached as invalid, thereby blocking all messages
3216 to all local parts at the same domain, from all senders. This bug has
3217 been fixed. The domain is no longer cached after a negative response to
3218 MAIL if the sender used is not empty.
3220 (b) The default behaviour of using MAIL FROM:<> for recipient callouts has
3223 (c) A new callout option, "use_sender" has been added for people who want
3224 the modified behaviour.
3230 1. Removed "EXTRALIBS=-lwrap" from OS/Makefile-Unixware7 on the advice of
3233 2. Removed "LIBS = -lresolv" from OS/Makefile-Darwin as it is not needed, and
3234 indeed breaks things for older releases.
3236 3. Added additional logging to the case where there is a problem reading data
3237 from a filter that is running in a subprocess using a pipe, in order to
3238 try to track down a specific problem.
3240 4. Testing facility fudge: when running in the test harness and attempting
3241 to connect to 10.x.x.x (expecting a connection timeout) I'm now sometimes
3242 getting "No route to host". Convert this to a timeout.
3244 5. Define ICONV_ARG2_TYPE as "char **" for Unixware7 to avoid compiler
3247 6. Some OS don't have socklen_t but use size_t instead. This affects the
3248 fifth argument of getsockopt() amongst other things. This is now
3249 configurable by a macro called SOCKLEN_T which defaults to socklen_t, but
3250 can be set for individual OS. I have set it for SunOS5, OSF1, and
3251 Unixware7. Current versions of SunOS5 (aka Solaris) do have socklen_t, but
3252 some earlier ones do not.
3254 7. Change 4.30/15 was not doing the test caselessly.
3256 8. The standard form for an IPv6 address literal was being rejected by address
3257 parsing in, for example, MAIL and RCPT commands. An example of this kind of
3258 address is [IPv6:2002:c1ed:8229:10:202:2dff:fe07:a42a]. Exim now accepts
3259 this, as well as the form without the "IPv6" on the front (but only when
3260 address literals are enabled, of course).
3262 9. Added some casts to avoid compiler warnings in OS/os.c-Linux.
3264 10. Exim crashed if a message with an empty sender address specified by -f
3265 encountered a router with an errors_to setting. This could be provoked only
3266 by a command such as
3270 where an empty string was supplied; "<>" did not hit this bug.
3272 11. Installed PCRE release 4.5.
3274 12. If EHLO/HELO was rejected by an ACL, the value of $sender_helo_name
3275 remained set. It is now erased.
3277 13. exiqgrep wasn't working on MacOS X because it didn't correctly compute
3278 times from message ids (which are base 36 rather than the normal 62).
3280 14. "Expected" SMTP protocol errors that can arise when PIPELINING is in use
3281 were being counted as actual protocol errors, and logged if the log
3282 selector +smtp_protocol_error was set. One cannot be perfect in this test,
3283 but now, if PIPELINING has been advertised, RCPT following a rejected MAIL,
3284 and DATA following a set of rejected RCPTs do not count as protocol errors.
3285 In other words, Exim assumes they were pipelined, though this may not
3286 actually be the case. Of course, in all cases the client gets an
3287 appropriate error code.
3289 15. If a lookup fails in an ACL condition, a message about the failure may
3290 be available; it is used if testing the ACL cannot continue, because most
3291 such messages specify what the cause of the deferral is. However, some
3292 messages (e.g. "MYSQL: no data found") do not cause a defer. There was bug
3293 that caused an old message to be retained and used if a later statement
3294 caused a defer, replacing the real cause of the deferral.
3296 16. If an IP address had so many PTR records that the DNS lookup buffer
3297 was not large enough to hold them, Exim could crash while trying to process
3298 the truncated data. It now detects and logs this case.
3300 17. Further to 4.21/58, another change has been made: if (and only if) the
3301 first line of a message (the first header line) ends with CRLF, a bare LF
3302 in a subsequent header line has a space inserted after it, so as not to
3303 terminate the header.
3305 18. Refactoring: tidied an ugly bit of code in appendfile that copied data
3306 unnecessarily, used atoi() instead of strtol(), and didn't check the
3307 termination when getting file sizes from file names by regex.
3309 19. Completely re-implemented the support for maildirsize files, in the light
3310 of a number of problems with the previous contributed implementation
3311 (4.30/29). In particular:
3313 . If the quota is zero, the maildirsize file is maintained, but no quota is
3316 . If the maildir directory does not exist, it is created before any attempt
3317 to write a maildirsize file.
3319 . The quota value in the file is just a cache; if the quota is changed in
3320 the transport, the new value overrides.
3322 . A regular expression is available for excluding directories from the
3325 20. The autoreply transport checks the characters in options that define the
3326 message's headers; it allows continued headers, but it was checking with
3327 isspace() after an embedded newline instead of explicitly looking for a
3330 21. If all the "regular" hosts to which an address was routed had passed their
3331 expiry times, and had not reached their retry times, the address was
3332 bounced, even if fallback hosts were defined. Now Exim should go on to try
3335 22. Increased buffer sizes in the callout code from 1024 to 4096 to match the
3336 equivalent code in the SMTP transport. Some hosts send humungous responses
3337 to HELO/EHLO, more than 1024 it seems.
3339 23. Refactoring: code in filter.c used (void *) for "any old type" but this
3340 gives compiler warnings in some environments. I've now done it "properly",
3343 24. The replacement for inet_ntoa() that is used with gcc on IRIX systems
3344 (because of problems with the built-in one) was declared to return uschar *
3345 instead of char *, causing compiler failure.
3347 25. Fixed a file descriptor leak when processing alias/forward files.
3349 26. Fixed a minor format string issue in dbfn.c.
3351 27. Typo in exim.c: ("dmbnz" for "dbmnz").
3353 28. If a filter file refered to $h_xxx or $message_headers, and the headers
3354 contained RFC 2047 "words", Exim's memory could, under certain conditions,
3357 29. When a sender address is verified, it is cached, to save repeating the test
3358 when there is more than one recipient in a message. However, when the
3359 verification involves a callout, it is possible for different callout
3360 options to be set for different recipients. It is too complicated to keep
3361 track of this in the cache, so now Exim always runs a verification when a
3362 callout is required, relying on the callout cache for the optimization.
3363 The overhead is duplication of the address routing, but this should not be
3366 30. Fixed a bug in callout caching. If a RCPT command caused the sender address
3367 to be verified with callout=postmaster, and the main callout worked but the
3368 postmaster check failed, the verification correctly failed. However, if a
3369 subsequent RCPT command asked for sender verification *without* the
3370 postmaster check, incorrect caching caused this verification also to fail,
3373 31. Exim caches DNS lookup failures so as to avoid multiple timeouts; however,
3374 it was not caching the DNS options (qualify_single, search_parents) that
3375 were used when the lookup failed. A subsequent lookup with different
3376 options therefore always gave the same answer, though there were cases
3377 where it should not have. (Example: a "domains = !$mx_any" option on a
3378 dnslookup router: the "domains" option is always processed without any
3379 widening, but the router might have qualify_single set.) Now Exim uses the
3380 cached value only when the same options are set.
3382 32. Added John Jetmore's "exipick" utility to the distribution.
3384 33. GnuTLS: When an attempt to start a TLS session fails for any reason other
3385 than a timeout (e.g. a certificate is required, and is not provided), an
3386 Exim server now closes the connection immediately. Previously it waited for
3387 the client to close - but if the client is SSL, it seems that they each
3388 wait for each other, leading to a delay before one of them times out.
3390 34: GnuTLS: Updated the code to use the new GnuTLS 1.0.0 API. I have not
3391 maintained 0.8.x compatibility because I don't think many are using it, and
3392 it is clearly obsolete.
3394 35. Added TLS support for CRLs: a tls_crl global option and one for the smtp
3397 36. OpenSSL: $tls_certificate_verified was being set to 1 even if the
3398 client certificate was expired. A simple patch fixes this, though I don't
3399 understand the full logic of why the verify callback is called multiple
3402 37. OpenSSL: a patch from Robert Roselius: "Enable client-bug workaround.
3403 Versions of OpenSSL as of 0.9.6d include a 'CBC countermeasure' feature,
3404 which causes problems with some clients (such as the Certicom SSL Plus
3405 library used by Eudora). This option, SSL_OP_DONT_INSERT_EMPTY_FRAGMENTS,
3406 disables the coutermeasure allowing Eudora to connect."
3408 38. Exim was not checking that a write() to a log file succeeded. This could
3409 lead to Bad Things if a log got too big, in particular if it hit a file
3410 size limit. Exim now panics and dies if it cannot write to a log file, just
3411 as it does if it cannot open a log file.
3413 39. Modified OS/Makefile-Linux so that it now contains
3415 CFLAGS=-O -D_FILE_OFFSET_BITS=64 -D_LARGEFILE_SOURCE
3417 The two -D definitions ensure that Exim is compiled with large file
3418 support, which makes it possible to handle log files that are bigger than
3421 40. Fixed a subtle caching bug: if (in an ACL or a set of routers, for
3422 instance) a domain was checked against a named list that involved a lookup,
3423 causing $domain_data to be set, then another domain was checked against the
3424 same list, then the first domain was re-checked, the value of $domain_data
3425 after the final check could be wrong. In particular, if the second check
3426 failed, it could be set empty. This bug probably also applied to
3429 41. The strip_trailing_dot option was not being applied to the address given
3430 with the -f command-line option.
3432 42. The code for reading a message's header from the spool was incrementing
3433 $received_count, but never initializing it. This meant that the value was
3434 incorrect (doubled) while delivering a message in the same process in which
3435 it was received. In the most common configuration of Exim, this never
3436 happens - a fresh exec is done - but it can happen when
3437 deliver_drop_privilege is set.
3439 43. When Exim logs an SMTP synchronization error - client data sent too soon -
3440 it now includes up to 150 characters of the unexpected data in the log
3443 44. The exim_dbmbuild utility uses fixed size buffers for reading input lines
3444 and building data strings. The size of both of these buffers was 10 000
3445 bytes - far larger than anybody would *ever* want, thought I. Needless to
3446 say, somebody hit the limit. I have increased the maximum line length to
3447 20 000 and the maximum data length of concatenated lines to 100 000. I have
3448 also fixed two bugs, because there was no checking on these buffers. Tsk,
3449 tsk. Now exim_dbmbuild gives a message and exits with an error code if a
3450 buffer is too small.
3452 45. The exim_dbmbuild utility did not support quoted keys, as Exim does in
3453 lsearch lookups. Now it does.
3455 46. When parsing a route_list item in a manualroute router, a fixed-length
3456 buffer was used for the list of hosts. I made this 1024 bytes long,
3457 thinking that nobody would ever have a list of hosts that long. Wrong.
3458 Somebody had a whole pile of complicated expansion conditions, and the
3459 string was silently truncated, leading to an expansion error. It turns out
3460 that it is easier to change to an unlimited length (owing to other changes
3461 that have happened since this code was originally written) than to build
3462 structure for giving a limitation error. The length of the item that
3463 expands into the list of hosts is now unlimited.
3465 47. The lsearch lookup could not handle data where the length of text line was
3466 more than 4095 characters. Such lines were truncated, leading to shortened
3467 data being returned. It should now handle lines of any length.
3469 48. Minor wording revision: "cannot test xxx in yyy ACL" becomes "cannot test
3470 xxx condition in yyy ACL" (e.g. "cannot test domains condition in DATA
3473 49. Cosmetic tidy to scripts like exicyclog that are generated by globally
3474 replacing strings such as BIN_DIRECTORY in a source file: the replacement
3475 no longer happens in comment lines. A list of replacements is now placed
3476 at the head of all of the source files, except those whose only change is
3477 to replace PERL_COMMAND in the very first #! line.
3479 50. Replaced the slow insertion sort in queue.c, for sorting the list of
3480 messages on the queue, with a bottom-up merge sort, using code contributed
3481 by Michael Haardt. This should make operations like -bp somewhat faster on
3482 large queues. It won't affect queue runners, except when queue_run_in_order
3485 51. Installed eximstats 1.31 in the distribution.
3487 52. Added support for SRV lookups to the dnslookup router.
3489 53. If an ACL referred to $message_body or $message_body_end, the value was not
3490 reset for any messages that followed in the same SMTP session.
3492 54. The store-handling optimization for building very long strings was not
3493 differentiating between the different store pools. I don't think this
3494 actually made any difference in practice, but I've tidied it.
3496 55. While running the routers to verify a sender address, $sender_address
3497 was still set to the sender address. This is wrong, because when routing to
3498 send a bounce to the sender, it would be empty. Therefore, I have changed
3499 it so that, while verifying a sender address, $sender_address is set to <>.
3500 (There is no change to what happens when verifying a recipient address.)
3502 56. After finding MX (or SRV) records, Exim was doing a DNS lookup for the
3503 target A or AAAA records (if not already returned) without resetting the
3504 qualify_single or search_parents options of the DNS resolver. These are
3505 inappropriate in this case because the targets of MX and SRV records must
3506 be FQDNs. A broken DNS record could cause trouble if it happened to have a
3507 target that, when qualified, matched something in the local domain. These
3508 two options are now turned off when doing these lookups.
3510 57. It seems that at least some releases of Reiserfs (which does not have the
3511 concept of a fixed number of inodes) returns zero and not -1 for the
3512 number of available inodes. This interacted badly with check_spool_inodes,
3513 which assumed that -1 was the "no such thing" setting. What I have done is
3514 to check that the total number of inodes is greater than zero before doing
3515 the test of how many are available.
3517 58. When a "warn" ACL statement has a log_message modifier, the message is
3518 remembered, and not repeated. This is to avoid a lot of repetition when a
3519 message has many recipients that cause the same warning to be written.
3520 Howewer, Exim was preserving the list of already written lines for an
3521 entire SMTP session, which doesn't seem right. The memory is now reset if a
3522 new message is started.
3524 59. The "rewrite" debugging flag was not showing the result of rewriting in the
3525 debugging output unless log_rewrite was also set.
3527 60. Avoid a compiler warning on 64-bit systems in dsearch.c by avoiding the use
3528 of (int)(handle) when we know that handle contains (void *)(-1).
3530 61. The Exim daemon panic-logs an error return when it closes the incoming
3531 connection. However "connection reset by peer" seems to be common, and
3532 isn't really an error worthy of noting specially, so that particular error
3535 62. When Exim is trying to find all the local interfaces, it used to panic and
3536 die if the ioctl to get the interface flags failed. However, it seems that
3537 on at least one OS (Solaris 9) it is possible to have an interface that is
3538 included in the list of interfaces, but for which you get a failure error
3539 for this call. This happens when the interface is not "plumbed" into a
3540 protocol (i.e. neither IPv4 nor IPv6). I've changed the code so that a
3541 failure of the "get flags" call assumes that the interface is down.
3543 63. Added a ${eval10: operator, which assumes all numbers are decimal. This
3544 makes life easier for people who are doing arithmetic on fields extracted
3545 from dates, where you often get leading zeros that should not be
3546 interpreted as octal.
3548 64. Added qualify_domain to the redirect router, to override the global
3551 65. If a pathologically long header line contained very many addresses (the
3552 report of this problem mentioned 10 000) and each of them was rewritten,
3553 Exim could use up a very large amount of memory. (It kept on making new
3554 copies of the header line as it rewrote, and never released the old ones.)
3555 At the expense of a bit more processing, the header rewriting function has
3556 been changed so that it no longer eats memory in this way.
3558 66. The generation of the Received: header has been moved from the time that a
3559 message starts to be received, to the time that it finishes. The timestamp
3560 in the Received: header should now be very close to that of the <= log
3561 line. There are two side-effects of this change:
3563 (a) If a message is rejected by a DATA or non-SMTP ACL or local_scan(), the
3564 logged header lines no longer include the local Received: line, because
3565 it has not yet been created. The same applies to a copy of the message
3566 that is returned to a non-SMTP sender when a message is rejected.
3568 (b) When a filter file is tested using -bf, no additional Received: header
3569 is added to the test message. After some thought, I decided that this
3572 This change does not affect the value of $received_for. It is still set
3573 after address rewriting, but before local_scan() is called.
3575 67. Installed the latest Cygwin-specific files from the Cygwin maintainer.
3577 68. GnuTLS: If an empty file is specified for tls_verify_certificates, GnuTLS
3578 gave an unhelpful panic error message, and a defer error. I have managed to
3579 change this behaviour so that it now rejects any supplied certificate,
3580 which seems right, as the list of acceptable certificates is empty.
3582 69. OpenSSL: If an empty file is specified for tls_verify_certificates, OpenSSL
3583 gave an unhelpful defer error. I have not managed to make this reject any
3584 supplied certificates, but the error message it gives is "no certificate
3585 supplied", which is not helpful.
3587 70. exigrep's output now also includes lines that are not associated with any
3588 message, but which match the given pattern. Implemented by a patch from
3589 Martin Sluka, which also tidied up the Perl a bit.
3591 71. Recipient callout verification, like sender verification, was using <> in
3592 the MAIL FROM command. This isn't really the right thing, since the actual
3593 sender may affect whether the remote host accepts the recipient or not. I
3594 have changed it to use the actual sender in the callout; this means that
3595 the cache record is now keyed on a recipient/sender pair, not just the
3596 recipient address. There doesn't seem to be a real danger of callout loops,
3597 since a callout by the remote host to check the sender would use <>.
3598 [SEE ABOVE: changed after hitting problems.]
3600 72. Exim treats illegal SMTP error codes that do not begin with 4 or 5 as
3601 temporary errors. However, in the case of such a code being given after
3602 the end of a data transmission (i.e. after ".") Exim was failing to write
3603 a retry record for the message. (Yes, there was some broken host that was
3604 actually sending 8xx at this point.)
3606 73. An unknown lookup type in a host list could cause Exim to panic-die when
3607 the list was checked. (An example that provoked this was putting <; in the
3608 middle of a list instead of at the start.) If this happened during a DATA
3609 ACL check, a -D file could be left lying around. This kind of configuration
3610 error no longer causes Exim to die; instead it causes a defer errror. The
3611 incident is still logged to the main and panic logs.
3613 74. Buglet left over from Exim 3 conversion. The message "too many messages
3614 in one connection" was written to the rejectlog but not the mainlog, except
3615 when address rewriting (yes!) was being logged.
3617 75. Added write_rejectlog option.
3619 76. When a system filter was run not as root (that is, when system_filter_user
3620 was set), the values of the $n variables were not being returned to the
3621 main process; thus, they were not subsequently available in the $sn
3624 77. Added +return_path_on_delivery log selector.
3626 78. A connection timeout was being treated differently from recipients deferred
3627 when testing hosts_max_try with a message that was older than the host's
3628 retry timeout. (The host should not be counted, thus allowing all hosts to
3629 be tried at least once before bouncing.) This may have been the cause of an
3630 occasionally reported bug whereby a message would remain on the queue
3631 longer than the retry timeout, but would be bounced if a delivery was
3632 forced. I say "may" because I never totally pinned down the problem;
3633 setting up timeout/retry tests is difficult. See also the next item.
3635 79. The ultimate address timeout was not being applied to errors that involved
3636 a combination of host plus message (for example, a timeout on a MAIL
3637 command). When an address resolved to a number of possible hosts, and they
3638 were not all tried for each delivery (e.g. because of hosts_max_try), a
3639 message could remain on the queue longer than the retry timeout.
3641 80. Sieve bug: "stop" inside "elsif" was broken. Applied a patch from Michael
3644 81. Fixed an obscure SMTP outgoing bug which required at least the following
3645 conditions: (a) there was another message waiting for the same server;
3646 (b) the server returned 5xx to all RCPT commands in the first message so
3647 that the message was not completed; (c) the server dropped the connection
3648 or gave a negative response to the RSET that Exim sends to abort the
3649 transaction. The observed case was a dropped connection after DATA that had
3650 been sent in pipelining mode. That is, the server had advertised PIPELINING
3651 but was not implementing it correctly. The effect of the bug was incorrect
3652 behaviour, such as trying another host, and this could lead to a crash.
3658 1. The 3rd arguments to getsockname(), getpeername(), and accept() in exim.c
3659 and daemon.c were passed as pointers to ints; they should have been
3660 pointers to socklen_t variables (which are typically unsigned ints).
3662 2. Some signed/unsigned type warnings in the os.c file for Linux have been
3665 3. Fixed a really odd bug that affected only the testing scheme; patching a
3666 certain fixed string in the binary changed the value of another string that
3667 happened to be identical to the end of the original first string.
3669 4. When gethostbyname() (or equivalent) is passed an IP address as a "host
3670 name", it returns that address as the IP address. On some operating
3671 systems (e.g. Solaris), it also passes back the IP address string as the
3672 "host name". However, on others (e.g. Linux), it passes back an empty
3673 string. Exim wasn't checking for this, and was changing the host name to an
3674 empty string, assuming it had been canonicized.
3676 5. Although rare, it is permitted to have more than one PTR record for a given
3677 IP address. I thought that gethostbyaddr() or getipnodebyaddr() always gave
3678 all the names associated with an address, because they do in Solaris.
3679 However, it seems that they do not in Linux for data that comes from the
3680 DNS. If an address in /etc/hosts has multiple names, they _are_ all given.
3681 I found this out when I moved to a new Linux workstation and tried to run
3682 the Exim test suite.
3684 To get round this problem I have changed the code so that it now does its
3685 own call to the DNS to look up PTR records when searching for a host name.
3686 If nothing can be found in the DNS, it tries gethostbyaddr(), so that
3687 addresses that are only in /etc/hosts are still found.
3689 This behaviour is, however, controlled by an option called host_lookup_
3690 order, which defaults to "bydns:byaddr". If people want to use the other
3691 order, or indeed, just use one or the other means of lookup, they can
3692 specify it in this variable.
3694 6. If a PTR record yields an empty name, Exim treats it as non-existent. In
3695 some operating systems, this comes back from gethostbyaddr() as an empty
3696 string, and this is what Exim used to test for. However, it seems that in
3697 other systems, "." is yielded. Exim now tests for this case too.
3699 7. The values of check_spool_space and check_log_space are now held internally
3700 as a number of kilobytes instead of an absolute number of bytes. If a
3701 numbers is specified without 'K' or 'M', it is rounded up to the nearest
3702 kilobyte. This means that much larger values can be stored.
3704 8. Exim monitor: an attempt to get the action menu when not actually pointing
3705 at a message produces an empty menu entitled "No message selected". This
3706 works on Solaris (OpenWindows). However, XFree86 does not like a menu with
3707 no entries in it ("Shell widget menu has zero width and/or height"). So I
3708 have added a single, blank menu entry in this case.
3710 9. Added ${quote_local_part.
3712 10. MIME decoding is now applied to the contents of Subject: header lines when
3715 11. Now that a reference to $sender_host_address automatically causes a reverse
3716 lookup to occur if necessary (4.13/18), there is no need to arrange for a
3717 host lookup before query-style lookups in lists that might use this
3718 variable. This has therefore been abolished, and the "net-" prefix is no
3719 longer necessary for query-style lookups.
3721 12. The Makefile for SCO_SV contained a setting of LDFLAGS. This appears to
3722 have been a typo for LFLAGS, so it has been changed.
3724 13. The install script calls Exim with "-C /dev/null" in order to find the
3725 version number. If ALT_CONFIG_PREFIX was set, this caused an error message
3726 to be output. Howeve, since Exim outputs its version number before the
3727 error, it didn't break the script. It just looked ugly. I fixed this by
3728 always allowing "-C /dev/null" if the caller is root.
3730 14. Ignore overlarge ACL variable number when reading spool file - insurance
3731 against a later release with more variables having written the file.
3733 15. The standard form for an IPv6 address literal was being rejected by EHLO.
3734 Example: [IPv6:2002:c1ed:8229:10:202:2dff:fe07:a42a]. Exim now accepts
3735 this, as well as the form without the "IPv6" on the front.
3737 16. Added CHOWN_COMMAND=/usr/sbin/chown and LIBS=-lresolv to the
3738 OS/Makefile-Darwin file.
3740 17. Fixed typo in lookups/ldap.c: D_LOOKUP should be D_lookup. This applied
3741 only to LDAP libraries that do not have LDAP_OPT_DEREF.
3743 18. After change 4.21/52, "%ld" was used to format the contents of the $inode
3744 variable. However, some OS use ints for inodes. I've added cast to long int
3745 to get rid of the compiler warning.
3747 19. I had forgotten to lock out "/../" in configuration file names when
3748 ALT_CONFIG_PREFIX was set.
3750 20. Routers used for verification do not need to specify transports. However,
3751 if such a router generated a host list, and callout was configured, Exim
3752 crashed, because it could not find a port number from the (non-existent)
3753 transport. It now assumes port 25 in this circumstance.
3755 21. Added the -t option to exigrep.
3757 22. If LOOKUP_LSEARCH is defined, all three linear search methods (lsearch,
3758 wildlsearch, nwildlsearch) are compiled. LOOKUP_WILDLSEARCH and LOOKUP_
3759 NWILDLSEARCH are now obsolete, but retained for compatibility. If either of
3760 them is set, LOOKUP_LSEARCH is forced.
3762 23. "exim -bV" now outputs a list of lookups that are included in the binary.
3764 24. Added sender and host information to the "rejected by local_scan()" log
3765 line; previously there was no indication of these.
3767 25. Added .include_if_exists.
3769 26. Change 3.952/11 added an explicit directory sync on top of a file sync for
3770 Linux. It turns out that not all file systems support this. Apparently some
3771 versions of NFS do not. (It's rare to put Exim's spool on NFS, but people
3772 do it.) To cope with this, the error EINVAL, which means that sync-ing is
3773 not supported on the file descriptor, is now ignored when Exim is trying to
3774 sync a directory. This applies only to Linux.
3776 27. Added -DBIND_8_COMPAT to the CLFAGS setting for Darwin.
3778 28. In Darwin (MacOS X), the PAM headers are in /usr/include/pam and not in
3779 /usr/include/security. There's now a flag in OS/os.h-Darwin to cope with
3782 29. Added support for maildirsize files from supplied patch (modified a bit).
3784 30. The use of :fail: followed by an empty string could lead Exim to respond to
3785 sender verification failures with (e.g.):
3787 550 Verification failed for <xxx>
3788 550 Sender verify failed
3790 where the first response line was missing the '-' that indicates it is not
3791 the final line of the response.
3793 31. The loop for finding the name of the user that called Exim had a hardwired
3794 limit of 10; it now uses the value of finduser_retries, which is used for
3795 all other user lookups.
3797 32. Added $received_count variable, available in data and not_smtp ACLs, and at
3800 33. Exim was neglecting to zero errno before one call of strtol() when
3801 expanding a string and expecting an integer value. On some systems this
3802 resulted in spurious "integer overflow" errors. Also, it was casting the
3803 result into an int without checking.
3805 34. Testing for a connection timeout using "timeout_connect" in the retry rules
3806 did not work. The code looks as if it has *never* worked, though it appears
3807 to have been documented since at least releast 1.62. I have made it work.
3809 35. The "timeout_DNS" error in retry rules, also documented since at least
3810 1.62, also never worked. As it isn't clear exactly what this means, and
3811 clearly it isn't a major issue, I have abolished the feature by treating it
3812 as "timeout", and writing a warning to the main and panic logs.
3814 36. The display of retry rules for -brt wasn't always showing the error code
3817 37. Added new error conditions to retry rules: timeout_A, timeout_MX,
3818 timeout_connect_A, timeout_connect_MX.
3820 38. Rewriting the envelope sender at SMTP time did not allow it to be rewritten
3821 to the empty sender.
3823 39. The daemon was not analysing the content of -oX till after it had closed
3824 stderr and disconnected from the controlling terminal. This meant that any
3825 syntax errors were only noted on the panic log, and the return code from
3826 the command was 0. By re-arranging the code a little, I've made the
3827 decoding happen first, so such errors now appear on stderr, and the return
3828 code is 1. However, the actual setting up of the sockets still happens in
3829 the disconnected process, so errors there are still only recorded on the
3832 40. A daemon listener on a wildcard IPv6 socket that also accepts IPv4
3833 connections (as happens on some IP stacks) was logged at start up time as
3834 just listening for IPv6. It now logs "IPv6 with IPv4". This differentiates
3835 it from "IPv6 and IPv4", which means that two separate sockets are being
3838 41. The debug output for gethostbyname2() or getipnodebyname() failures now
3839 says whether AF_INET or AF_INET6 was passed as an argument.
3841 42. Exiwhat output was messed up when time zones were included in log
3844 43. Exiwhat now gives more information about the daemon's listening ports,
3845 and whether -tls-on-connect was used.
3847 44. The "port" option of the smtp transport is now expanded.
3849 45. A "message" modifier in a "warn" statement in a non-message ACL was being
3850 silently ignored. Now an error message is written to the main and panic
3853 46. There's a new ACL modifier called "logwrite" which writes to a log file
3854 as soon as it is encountered.
3856 47. Added $local_user_uid and $local_user_gid at routing time.
3858 48. Exim crashed when trying to verify a sender address that was being
3861 49. Exim was recognizing only a space character after ".include". It now also
3862 recognizes a tab character.
3864 50. Fixed several bugs in the Perl script that creates the exim.8 man page by
3865 extracting the relevant information from the specification. The man page no
3866 longer contains scrambled data for the -d option, and I've added a section
3867 at the front about calling Exim under different names.
3869 51. Added "extra_headers" argument to the "mail" command in filter files.
3871 52. Redirecting mail to an unqualified address in a Sieve filter caused Exim to
3874 53. Installed eximstats 1.29.
3876 54. Added transport_filter_timeout as a generic transport option.
3878 55. Exim no longer adds an empty Bcc: header to messages that have no To: or
3879 Cc: header lines. This was required by RFC 822, but it not required by RFC
3882 56. Exim used to add From:, Date:, and Message-Id: header lines to any
3883 incoming messages that did not have them. Now it does so only if the
3884 message originates locally, that is, if there is no associated remote host
3885 address. When Resent- header lines are present, this applies to the Resent-
3886 lines rather than the non-Resent- lines.
3888 57. Drop incoming SMTP connection after too many syntax or protocol errors. The
3889 limit is controlled by smtp_max_synprot_errors, defaulting to 3.
3891 58. Messages for configuration errors now include the name of the main
3892 configuration file - useful now that there may be more than one file in a
3893 list (.included file names were always shown).
3895 59. Change 4.21/82 (run initgroups() when starting the daemon) causes problems
3896 for those rare installations that do not start the daemon as root or run it
3897 setuid root. I've cut out the call to initgroups() if the daemon is not
3900 60. The Exim user and group can now be bound into the binary as text strings
3901 that are looked up at the start of Exim's processing.
3903 61. Applied a small patch for the Interbase code, supplied by Ard Biesheuvel.
3905 62. Added $mailstore_basename variable.
3907 63. Installed patch to sieve.c from Michael Haardt.
3909 64. When Exim failed to open the panic log after failing to open the main log,
3910 the original message it was trying to log was written to stderr and debug
3911 output, but if they were not available (the usual case in production), it
3912 was lost. Now it is written to syslog before the two lines that record the
3913 failures to open the logs.
3915 65. Users' Exim filters run in subprocesses under the user's uid. It is
3916 possible for a "deliver" command or an alias in a "personal" command to
3917 provoke an address rewrite. If logging of address rewriting is configured,
3918 this fails because the process is not running as root or exim. There may be
3919 a better way of dealing with this, but for the moment (because 4.30 needs
3920 to be released), I have disabled address rewrite logging when running a
3921 filter in a non-root, non-exim process.
3927 1. The buildconfig auxiliary program wasn't quoting the value set for
3928 HEADERS_CHARSET. This caused a compilation error complaining that 'ISO' was
3929 not defined. This bug was masked in 4.22 by the effect that was fixed in
3932 2. Some messages that were rejected after a message id was allocated were
3933 shown as "incomplete" by exigrep. It no longer does this for messages that
3934 are rejected by local_scan() or the DATA or non-SMTP ACLs.
3936 3. If a Message-ID: header used a domain literal in the ID, and Exim did not
3937 have allow_domain_literals set, the ID did not get logged in the <= line.
3938 Domain literals are now always recognized in Message-ID: header lines.
3940 4. The first argument for a ${extract expansion item is the key name or field
3941 number. Leading and trailing spaces in this item were not being ignored,
3942 causing some misleading effects.
3944 5. When deliver_drop_privilege was set, single queue runner processes started
3945 manually (i.e. by the command "exim -q") or by the daemon (which uses the
3946 same command in the process it spins off) were not dropping privilege.
3948 6. When the daemon running as "exim" started a queue runner, it always
3949 re-executed Exim in the spun-off process. This is a waste of effort when
3950 deliver_drop_privilege is set. The new process now just calls the
3951 queue-runner function directly.
3957 1. Typo in the src/EDITME file: it referred to HEADERS_DECODE_TO instead of
3960 2. Change 4.21/73 introduced a bug. The pid file path set by -oP was being
3961 ignored. Though the use of -oP was forcing the writing of a pid file, it
3962 was always written to the default place.
3964 3. If the message "no IP address found for host xxxx" is generated during
3965 incoming verification, it is now followed by identification of the incoming
3966 connection (so you can more easily find what provoked it).
3968 4. Bug fix for Sieve filters: "stop" inside a block was not working properly.
3970 5. Added some features to "harden" Exim a bit more against certain attacks:
3972 (a) There is now a build-time option called FIXED_NEVER_USERS that can
3973 be put in Local/Makefile. This is like the never_users runtime option,
3974 but it cannot be overridden. The default setting is "root".
3976 (b) If ALT_CONFIG_PREFIX is defined in Local/Makefile, it specifies a
3977 prefix string with which any file named in a -C command line option
3980 (c) If ALT_CONFIG_ROOT_ONLY is defined in Local/Makefile, root privilege
3981 is retained for -C and -D only if the caller of Exim is root. Without
3982 it, the exim user may also use -C and -D and retain privilege.
3984 (d) If DISABLE_D_OPTION is defined in Local/Makefile, the use of the -D
3985 command line option is disabled.
3987 6. Macro names set by the -D option must start with an upper case letter, just
3988 like macro names defined in the configuration file.
3990 7. Added "dereference=" facility to LDAP.
3992 8. Two instances of the typo "uknown" in the source files are fixed.
3994 9. If a PERL_COMMAND setting in Local/Makefile was not at the start of a line,
3995 the Configure-Makefile script screwed up while processing it.
3997 10. Incorporated PCRE 4.4.
3999 11. The SMTP synchronization check was not operating right at the start of an
4000 SMTP session. For example, it could not catch a HELO sent before the client
4001 waited for the greeting. There is now a check for outstanding input at the
4002 point when the greeting is written. Because of the duplex, asynchronous
4003 nature of TCP/IP, it cannot be perfect - the incorrect input may be on its
4004 way, but not yet received, when the check is performed.
4006 12. Added tcp_nodelay to make it possible to turn of the setting of TCP_NODELAY
4007 on TCP/IP sockets, because this apparently causes some broken clients to
4010 13. Installed revised OS/Makefile-CYGWIN and OS/os.c-cygwin (the .h file was
4011 unchanged) from the Cygwin maintainer.
4013 14. The code for -bV that shows what is in the binary showed "mbx" when maildir
4014 was supported instead of testing for mbx. Effectively a typo.
4016 15. The spa authenticator server code was not checking that the input it
4017 received was valid base64.
4019 16. The debug output line for the "set" modifier in ACLs was not showing the
4020 name of the variable that was being set.
4022 17. Code tidy: the variable type "vtype_string" was never used. Removed it.
4024 18. Previously, a reference to $sender_host_name did not cause a DNS reverse
4025 lookup on its own. Something else was needed to trigger the lookup. For
4026 example, a match in host_lookup or the need for a host name in a host list.
4027 Now, if $sender_host_name is referenced and the host name has not yet been
4028 looked up, a lookup is performed. If the lookup fails, the variable remains
4029 empty, and $host_lookup_failed is set to "1".
4031 19. Added "eqi" as a case-independent comparison operator.
4033 20. The saslauthd authentication condition could segfault if neither service
4034 nor realm was specified.
4036 21. If an overflowing value such as "2048M" was set for message_size_limit, the
4037 error message that was logged was misleading, and incoming SMTP
4038 connections were dropped. The message is now more accurate, and temporary
4039 errors are given to SMTP connections.
4041 22. In some error situations (such as 21 above) Exim rejects all SMTP commands
4042 (except RSET) with a 421 error, until QUIT is received. However, it was
4043 failing to send a response to QUIT.
4045 23. The HELO ACL was being run before the code for helo_try_verify_hosts,
4046 which made it impossible to use "verify = helo" in the HELO ACL. The HELO
4047 ACL is now run after the helo_try_verify_hosts code.
4049 24. "{MD5}" and "{SHA1}" are now recognized as equivalent to "{md5"} and
4050 "{sha1}" in the "crypteq" expansion condition (in fact the comparison is
4051 case-independent, so other case variants are also recognized). Apparently
4052 some systems use these upper case variants.
4054 25. If more than two messages were waiting for the same host, and a transport
4055 filter was specified for the transport, Exim sent two messages over the
4056 same TCP/IP connection, and then failed with "socket operation on non-
4057 socket" when it tried to send the third.
4059 26. Added Exim::debug_write and Exim::log_write for embedded Perl use.
4061 27. The extern definition of crypt16() in expand.c was not being excluded when
4062 the OS had its own crypt16() function.
4064 28. Added bounce_return_body as a new option, and bounce_return_size_limit
4065 as a preferred synonym for return_size_limit, both as an option and as an
4068 29. Added LIBS=-liconv to OS/Makefile-OSF1.
4070 30. Changed the default configuration ACL to relax the local part checking rule
4071 for addresses that are not in any local domains. For these addresses,
4072 slashes and pipe symbols are allowed within local parts, but the sequence
4073 /../ is explicitly forbidden.
4075 31. SPA server authentication was not clearing the challenge buffer before
4078 32. log_message in a "warn" ACL statement was writing to the reject log as
4079 well as to the main log, which contradicts the documentation and doesn't
4080 seem right (because no rejection is happening). So I have stopped it.
4082 33. Added Ard Biesheuvel's lookup code for accessing an Interbase database.
4083 However, I am unable to do any testing of this.
4085 34. Fixed an infelicity in the appendfile transport. When checking directories
4086 for a mailbox, to see if any needed to be created, it was accidentally
4087 using path names with one or more superfluous leading slashes; tracing
4088 would show up entries such as stat("///home/ph10", 0xFFBEEA48).
4090 35. If log_message is set on a "discard" verb in a MAIL or RCPT ACL, its
4091 contents are added to the log line that is written for every discarded
4092 recipient. (Previously a log_message setting was ignored.)
4094 36. The ${quote: operator now quotes the string if it is empty.
4096 37. The install script runs exim in order to find its version number. If for
4097 some reason other than non-existence or emptiness, which it checks, it
4098 could not run './exim', it was installing it with an empty version number,
4099 i.e. as "exim-". This error state is now caught, and the installation is
4102 38. An argument was missing from the function that creates an error message
4103 when Exim fails to connect to the socket for saslauthd authentication.
4104 This could cause Exim to crash, or give a corrupted message.
4106 39. Added isip, isip4, and isip6 to ${if conditions.
4108 40. The ACL variables $acl_xx are now saved with the message, and can be
4109 accessed later in routers, transports, and filters.
4111 41. The new lookup type nwildlsearch is like wildlsearch, except that the key
4112 strings in the file are not string-expanded.
4114 42. If a MAIL command specified a SIZE value that was too large to fit into an
4115 int variable, the check against message_size_limit failed. Such values are
4116 now forced to INT_MAX, which is around 2Gb for a 32-bit variable. Maybe one
4117 day this will have to be increased, but I don't think I want to be around
4118 when emails are that large.
4125 1. Removed HAVE_ICONV=yes from OS/Makefile-FreeBSD, since it seems that
4126 iconv() is not standard in FreeBSD.
4128 2. Change 4.21/17 was buggy and could cause stack overwriting on a system with
4129 IPv6 enabled. The observed symptom was a segmentation fault on return from
4130 the function os_common_find_running_interfaces() in src/os.c.
4132 3. In the check_special_case() function in daemon.c I had used "errno" as an
4133 argument name, which causes warnings on some systems. This was basically a
4134 typo, since it was named "eno" in the comments!
4136 4. The code that waits for the clock to tick (at a resolution of some fraction
4137 of a second) so as to ensure message-id uniqueness was always waiting for
4138 at least one whole tick, when it could have waited for less. [This is
4139 almost certainly not relevant at current processor speeds, where it is
4140 unlikely to ever wait at all. But we try to future-proof.]
4142 5. The function that sleeps for a time interval that includes fractions of a
4143 second contained a race. It did not block SIGALRM between setting the
4144 timer, and suspending (a couple of lines later). If the interval was short
4145 and the sigsuspend() was delayed until after it had expired, the suspension
4146 never ended. On busy systems this could lead to processes getting stuck for
4149 6. Some uncommon configurations may cause a lookup to happen in a queue runner
4150 process, before it forks any delivery processes. The open lookup caching
4151 mechanism meant that the open file or database connection was passed into
4152 the delivery process. The problem was that delivery processes always tidy
4153 up cached lookup data. This could cause a problem for the next delivery
4154 process started by the queue runner, because the external queue runner
4155 process does not know about the closure. So the next delivery process
4156 still has data in the lookup cache. In the case of a file lookup, there was
4157 no problem because closing a file descriptor in a subprocess doesn't affect
4158 the parent. However, if the lookup was caching a connection to a database,
4159 the connection was closed, and the second delivery process was likely to
4160 see errors such as "PGSQL: query failed: server closed the connection
4161 unexpectedly". The problem has been fixed by closing all cached lookups
4162 in a queue runner before running a delivery process.
4164 7. Compiler warning on Linux for the second argument of iconv(), which doesn't
4165 seem to have the "const" qualifier which it has on other OS. I've
4168 8. Change 4.21/2 was too strict. It is only if there are two authenticators
4169 *of the same type* (client or server) with the same public name that an
4170 error should be diagnosed.
4172 9. When Exim looked up a host name for an IP address, but failed to find the
4173 original IP address when looking up the host name (a safety check), it
4174 output the message "<ip address> does not match any IP for NULL", which was
4175 confusing, to say the least. The bug was that the host name should have
4176 appeared instead of "NULL".
4178 10. Since release 3.03, if Exim is called by a uid other than root or the Exim
4179 user that is built into the binary, and the -C or -D options is used, root
4180 privilege is dropped before the configuration file is read. In addition,
4181 logging is switched to stderr instead of the normal log files. If the
4182 configuration then re-defines the Exim user, the unprivileged environment
4183 is probably not what is expected, so Exim logs a panic warning message (but
4186 However, if deliver_drop_privilege is set, the unprivileged state may well
4187 be exactly what is intended, so the warning has been cut out in that case,
4188 and Exim is allowed to try to write to its normal log files.
4194 1. smtp_return_error_details was not giving details for temporary sender
4195 or receiver verification errors.
4197 2. Diagnose a configuration error if two authenticators have the same public
4200 3. Exim used not to create the message log file for a message until the first
4201 delivery attempt. This could be confusing when incoming messages were held
4202 for policy or load reasons. The message log file is now created at the time
4203 the message is received, and an initial "Received" line is written to it.
4205 4. The automatically generated man page for command line options had a minor
4206 bug that caused no ill effects; however, a more serious problem was that
4207 the procedure for building the man page automatically didn't always
4208 operate. Consequently, release 4.20 contains an out-of-date version. This
4209 shouldn't happen again.
4211 5. When building Exim with embedded Perl support, the script that builds the
4212 Makefile was calling 'perl' to find its compile-time parameters, ignoring
4213 any setting of PERL_COMMAND in Local/Makefile. This is now fixed.
4215 6. The freeze_tell option was not being used for messages that were frozen on
4216 arrival, either by an ACL or by local_scan().
4218 7. Added the smtp_incomplete_transaction log selector.
4220 8. After STARTTLS, Exim was not forgetting that it had advertised AUTH, so it
4221 was accepting AUTH without a new EHLO.
4223 9. Added tls_remember_esmtp to cope with YAEB. This allows AUTH and other
4224 ESMTP extensions after STARTTLS without a new EHLO, in contravention of the
4227 10. Logging of TCP/IP connections (when configured) now happens in the main
4228 daemon process instead of the child process, so that the TCP/IP connection
4229 count is more accurate (but it can never be perfect).
4231 11. The use of "drop" in a nested ACL was not being handled correctly in the
4232 outer ACL. Now, if condition failure induced by the nested "drop" causes
4233 the outer ACL verb to deny access ("accept" or "discard" after "endpass",
4234 or "require"), the connection is dropped.
4236 12. Similarly, "discard" in a nested ACL wasn't being handled. A nested ACL
4237 that yield "discard" can now be used with an "accept" or a "discard" verb,
4238 but an error is generated for any others (because I can't see a useful way
4239 to define what should happen).
4241 13. When an ACL is read dynamically from a file (or anywhere else), the lines
4242 are now processed in the same way as lines in the Exim configuration file.
4243 In particular, continuation lines are supported.
4245 14. Added the "dnslists = a.b.c!=n.n.n.n" feature.
4247 15. Added -ti meaning -t -i.
4249 16. Check for letters, digits, hyphens, and dots in the names of dnslist
4250 domains, and warn by logging if others are found.
4252 17. At least on BSD, alignment is not guarenteed for the array of ifreq's
4253 returned from GIFCONF when Exim is trying to find the list of interfaces on
4254 a host. The code in os.c has been modified to copy each ifreq to an aligned
4255 structure in all cases.
4257 Also, in some cases, the returned ifreq's were being copied to a 'struct
4258 ifreq' on the stack, which was subsequently passed to host_ntoa(). That
4259 means the last couple of bytes of an IPv6 address could be chopped if the
4260 ifreq contained only a normal sockaddr (14 bytes storage).
4262 18. Named domain lists were not supported in the hosts_treat_as_local option.
4263 An entry such as +xxxx was not recognized, and was treated as a literal
4266 19. Ensure that header lines added by a DATA ACL are included in the reject log
4267 if the ACL subsequently rejects the message.
4269 20. Upgrade the cramtest.pl utility script to use Digest::MD5 instead of just
4270 MD5 (which is deprecated).
4272 21. When testing a filter file using -bf, Exim was writing a message when it
4273 took the sender from a "From " line in the message, but it was not doing so
4274 when it took $return_path from a Return-Path: header line. It now does.
4276 22. If the contents of a "message" modifier for a "warn" ACL verb do not begin
4277 with a valid header line field name (a series of printing characters
4278 terminated by a colon, Exim now inserts X-ACL-Warn: at the beginning.
4280 23. Changed "disc" in the source to "disk" to conform to the documentation and
4281 the book and for uniformity.
4283 24. Ignore Sendmail's -Ooption=value command line item.
4285 25. When execve() failed while trying to run a command in a pipe transport,
4286 Exim was returning EX_UNAVAILBLE (69) from the subprocess. However, this
4287 could be confused with a return value of 69 from the command itself. This
4288 has been changed to 127, the value the shell returns if it is asked to run
4289 a non-existent command. The wording for the related log line suggests a
4290 non-existent command as the problem.
4292 26. If received_header_text expands to an empty string, do not add a Received:
4293 header line to the message. (Well, it adds a token one on the spool, but
4294 marks it "old" so that it doesn't get used or transmitted.)
4296 27. Installed eximstats 1.28 (addition of -nt option).
4298 28. There was no check for failure on the call to getsockname() in the daemon
4299 code. This can fail if there is a shortage of resources on the system, with
4300 ENOMEM, for example. A temporary error is now given on failure.
4302 29. Contrary to the C standard, it seems that in some environments, the
4303 equivalent of setlocale(LC_ALL, "C") is not obeyed at the start of a C
4304 program. Exim now does this explicitly; it affects the formatting of
4305 timestamps using strftime().
4307 30. If exiqsumm was given junk data, it threw up some uninitialized variable
4308 complaints. I've now initialized all the variables, to avoid this.
4310 32. Header lines added by a system filter were not being "seen" during
4311 transport-time rewrites.
4313 33. The info_callback() function passed to OpenSSL is set up with type void
4314 (*)(SSL *, int, int), as described somewhere. However, when calling the
4315 function (actually a macro) that sets it up, the type void(*)() is
4316 expected. I've put in a cast to prevent warnings from picky compilers.
4318 34. If a DNS black list lookup found a CNAME record, but there were no A
4319 records associated with the domain it pointed at, Exim crashed.
4321 35. If a DNS black list lookup returned more than one A record, Exim ignored
4322 all but the first. It now scans all returned addresses if a particular IP
4323 value is being sought. In this situation, the contents of the
4324 $dnslist_value variable are a list of all the addresses, separated by a
4327 36. Tightened up the rules for host name lookups using reverse DNS. Exim used
4328 to accept a host name and all its aliases if the forward lookup for any of
4329 them yielded the IP address of the incoming connection. Now it accepts only
4330 those names whose forward lookup yields the correct IP address. Any other
4331 names are discarded. This closes a loophole whereby a rogue DNS
4332 administrator could create reverse DNS records to break through a
4333 wildcarded host restriction in an ACL.
4335 37. If a user filter or a system filter that ran in a subprocess used any of
4336 the numerical variables ($1, $2 etc), or $thisaddress, in a pipe command,
4337 the wrong values were passed to the pipe command ($thisaddress had the
4338 value of $0, $0 had the value of $1, etc). This bug was introduced by
4339 change 4.11/101, and not discovered because I wrote an inadequate test. :-(
4341 38. Improved the line breaking for long SMTP error messages from ACLs.
4342 Previously, if there was no break point between 40 and 75 characters, Exim
4343 left the rest of the message alone. Two changes have been made: (a) I've
4344 reduced the minimum length to 35 characters; (b) if it can't find a break
4345 point between 35 and 75 characters, it looks ahead and uses the first one
4346 that it finds. This may give the occasional overlong line, but at least the
4347 remaining text gets split now.
4349 39. Change 82 of 4.11 was unimaginative. It assumed the limit on the number of
4350 file descriptors might be low, and that setting 1000 would always raise it.
4351 It turns out that in some environments, the limit is already over 1000 and
4352 that lowering it causes trouble. So now Exim takes care not to decrease it.
4354 40. When delivering a message, the value of $return_path is set to $sender_
4355 address at the start of routing (routers may change the value). By an
4356 oversight, this default was not being set up when an address was tested by
4357 -bt or -bv, which affected the outcome if any router or filter referred to
4360 41. The idea of the "warn" ACL verb is that it adds a header or writes to the
4361 log only when "message" or "log_message" are set. However, if one of the
4362 conditions was an address verification, or a call to a nested ACL, the
4363 messages generated by the underlying test were being passed through. This
4364 no longer happens. The underlying message is available in $acl_verify_
4365 message for both "message" and "log_message" expansions, so it can be
4366 passed through if needed.
4368 42. Added RFC 2047 interpretation of header lines for $h_ expansions, with a
4369 new expansion $bh_ to give the encoded byte string without charset
4370 translation. Translation happens only if iconv() is available; HAVE_ICONV
4371 indicates this at build time. HEADERS_CHARSET gives the charset to
4372 translate to; headers_charset can change it in the configuration, and
4373 "headers charset" can change it in an individual filter file.
4375 43. Now that we have a default RFC 2047 charset (see above), the code in Exim
4376 that creates RFC 2047 encoded "words" labels them as that charset instead
4377 of always using iso-8859-1. The cases are (i) the explicit ${rfc2047:
4378 expansion operator; (ii) when Exim creates a From: line for a local
4379 message; (iii) when a header line is rewritten to include a "phrase" part.
4381 44. Nasty bug in exiqsumm: the regex to skip already-delivered addresses was
4382 buggy, causing it to skip the first lines of messages whose message ID
4383 ended in 'D'. This would not have bitten before Exim release 4.14, because
4384 message IDs were unlikely to end in 'D' before then. The effect was to have
4385 incorrect size information for certain domains.
4387 45. #include "config.h" was missing at the start of the crypt16.c module. This
4388 caused trouble on Tru64 (aka OSF1) systems, because HAVE_CRYPT16 was not
4391 46. If there was a timeout during a "random" callout check, Exim treated it as
4392 a failure of the random address, and carried on sending RSET and the real
4393 address. If the delay was just some slowness somewhere, the response to the
4394 original RCPT would be taken as a response to RSET and so on, causing
4395 mayhem of various kinds.
4397 47. Change 50 for 4.20 was a heap of junk. I don't know what I was thinking
4398 when I implemented it. It didn't allow for the fact that some option values
4399 may legitimatetly be negative (e.g. size_addition), and it didn't even do
4400 the right test for positive values.
4402 48. Domain names in DNS records are case-independent. Exim always looks them up
4403 in lower case. Some resolvers return domain names in exactly the case they
4404 appear in the zone file, that is, they may contain uppercase letters. Not
4405 all resolvers do this - some return always lower case. Exim was treating a
4406 change of case by a resolver as a change of domain, similar to a widening
4407 of a domain abbreviation. This triggered its re-routing code and so it was
4408 trying to route what was effectively the same domain again. This normally
4409 caused routing to fail (because the router wouldn't handle the domain
4410 twice). Now Exim checks for this case specially, and just changes the
4411 casing of the domain that it ultimately uses when it transmits the message
4414 49. Added Sieve (RFC 3028) support, courtesy of Michael Haardt's contributed
4417 50. If a filter generated a file delivery with a non-absolute name (possible if
4418 no home directory exists for the router), the forbid_file option was not
4421 51. Added '&' feature to dnslists, to provide bit mask matching in addition to
4422 the existing equality matching.
4424 52. Exim was using ints instead of ino_t variables in some places where it was
4425 dealing with inode numbers.
4427 53. If TMPDIR is defined in Local/Makefile (default in src/EDITME is
4428 TMPDIR="/tmp"), Exim checks for the presence of an environment variable
4429 called TMPDIR, and if it finds it is different, it changes its value.
4431 54. The smtp_printf() function is now made available to local_scan() so
4432 additional output lines can be written before returning. There is also an
4433 smtp_fflush() function to enable the detection of a dropped connection.
4434 The variables smtp_input and smtp_batched_input are exported to
4437 55. Changed the default runtime configuration: the message "Unknown user"
4438 has been removed from the ACL, and instead placed on the localuser router,
4439 using the cannot_route_message feature. This means that any verification
4440 failures that generate their own messages won't get overridden. Similarly,
4441 the "Unrouteable address" message that was in the ACL for unverifiable
4442 relay addresses has also been removed.
4444 56. Added hosts_avoid_esmtp to the smtp transport.
4446 57. The exicyclog script was not checking for the esoteric option
4447 CONFIGURE_FILE_USE_EUID in the Local/Makefile. It now does this, but it
4448 will work only if exicyclog is run under the appropriate euid.
4450 58. Following a discussion on the list, the rules by which Exim recognises line
4451 endings on incoming messages have been changed. The -dropcr and drop_cr
4452 options are now no-ops, retained only for backwards compatibility. The
4453 following line terminators are recognized: LF CRLF CR. However, special
4454 processing applies to CR:
4456 (i) The sequence CR . CR does *not* terminate an incoming SMTP message,
4457 nor a local message in the state where . is a terminator.
4459 (ii) If a bare CR is encountered in a header line, an extra space is added
4460 after the line terminator so as not to end the header. The reasoning
4461 behind this is that bare CRs in header lines are most likely either
4462 to be mistakes, or people trying to play silly games.
4464 59. The size of a message, as listed by "-bp" or in the Exim monitor window,
4465 was being incorrectly given as 18 bytes larger than it should have been.
4466 This is a VOB (very old bug).
4468 60. This may never have affected anything current, but just in case it has:
4469 When the local host is found other than at the start of a list of hosts,
4470 the local host, those with the same MX, and any that follow, are discarded.
4471 When the list in question was part of a longer list of hosts, the following
4472 hosts (not currently being processed) were also being discarded. This no
4473 longer happens. I'm not sure if this situation could ever has previously
4476 61. Added the "/MX" feature to lists of hosts in the manualroute and query
4479 62. Whenever Exim generates a new message, it now adds an Auto-Submitted:
4480 header. This is something that is recommended in a new Internet Draft, and
4481 is something that is documented as being done by Sendmail. There are two
4482 possible values. For messages generated by the autoreply transport, Exim
4485 Auto-Submitted: auto-replied
4487 whereas for all other generated messages (e.g. bounces) it adds
4489 Auto-Submitted: auto-generated
4491 63. The "personal" condition in filters now includes a test for the
4492 Auto-Submitted: header. If it contains the string "auto-" the message it
4493 not considered personal.
4495 64. Added rcpt_include_affixes as a generic transport option.
4497 65. Added queue_only_override (default true).
4499 66. Added the syslog_duplication option.
4501 67. If what should have been the first header line of a message consisted of
4502 a space followed by a colon, Exim was mis-interpreting it as a header line.
4503 It isn't of course - it is syntactically invalid and should therefore be
4504 treated as the start of the message body. The misbehaviour could have
4505 caused a number of strange effects, including loss of data in subsequent
4506 header lines, and spool format errors.
4508 68. Formerly, the AUTH parameter on a MAIL command was trusted only if the
4509 client host had authenticated. This control can now be exercised by an ACL
4510 for more flexibility.
4512 69. By default, callouts do not happen when testing with -bh. There is now a
4513 variant, -bhc, which does actually run the callout code, including
4514 consulting and updating the callout cache.
4516 70. Added support for saslauthd authentication, courtesy of Alexander
4519 71. If statvfs() failed on the spool or log directories while checking their
4520 size for availability, Exim confusingly gave the error "space shortage".
4521 Furthermore, in debugging mode it crashed with a floating point exception.
4522 These checks are done if check_{spool,log}_{space,inodes} are set, and when
4523 an SMTP message arrives with SIZE= on the MAIL command. As this is a really
4524 serious problem, Exim now writes to the main and panic logs when this
4525 happens, with details of the failure. It then refuses to accept the
4526 incoming message, giving the message "spool directory problem" or "log
4527 directory problem" with a 421 code for SMTP messages.
4529 72. When Exim is about to re-exec itself, it ensures that the file descriptors
4530 0, 1, and 2 exist, because some OS complain for execs without them (see
4531 ChangeLog 4.05/30). If necessary, Exim opens /dev/null to use for these
4532 descriptors. However, the code omitted to check that the open succeeded,
4533 causing mysterious errors if for some reason the permissions on /dev/null
4534 got screwed. Now Exim writes a message to the main and panic logs, and
4535 bombs out if it can't open /dev/null.
4537 73. Re-vamped the way daemon_smtp_port, local_interfaces, and -oX work and
4538 interact so that it is all more flexible. It is supposed to remain
4539 backwards compatible. Also added extra_local_interfaces.
4541 74. Invalid data sent to a SPA (NTLM) server authenticator could cause the code
4542 to bomb out with an assertion failure - to the client this appears as a
4543 connection drop. This problem occurs in the part of the code that was taken
4544 from the Samba project. Fortunately, the assertion is in a very simple
4545 function, so I have fixed this by reproducing the function inline in the
4546 one place where it is called, and arranging for authentication to fail
4547 instead of killing the process with assert().
4549 75. The SPA client code was not working when the server requested OEM rather
4550 than Unicode encoding.
4552 76. Added code to make require_files with a specific uid setting more usable in
4553 the case where statting the file as root fails - usually a non-root-mounted
4554 NFS file system. When this happens and the failure is EACCES, Exim now
4555 forks a subprocess and does the per-uid checking as the relevant uid.
4557 77. Added process_log_path.
4559 78. If log_file_path was not explicitly set, a setting of check_log_space or
4560 check_log_inodes was ignored.
4562 79. If a space check for the spool or log partitions fails, the incident is now
4563 logged. Of course, in the latter case the data may get lost...
4565 80. Added the %p formatting code to string_format() so that it can be used to
4566 print addresses in debug_print(). Adjusted all the address printing in the
4567 debugging in store.c to use %p rather than %d.
4569 81. There was a concern that a line of code in smtp_in.c could overflow a
4570 buffer if a HELO/EHLO command was given followed by 500 or so spaces. As
4571 initially expressed, the concern was not well-founded, because trailing
4572 spaces are removed early. However, if the trailing spaces were followed by
4573 a NULL, they did not get removed, so the overflow was possible. Two fixes
4576 (a) I re-wrote the offending code in a cleaner fashion.
4577 (b) If an incoming SMTP command contains a NULL character, it is rejected
4580 82. When Exim changes uid/gid to the Exim user at daemon start time, it now
4581 runs initgroups(), so that if the Exim user is in any additional groups,
4582 they will be used during message reception.
4588 The change log for 4.20 and earlier releases has been archived.
projects / exim.git / blob