1 $Cambridge: exim/doc/doc-txt/ChangeLog,v 1.470 2007/02/06 11:11:39 ph10 Exp $
3 Change log file for Exim from version 4.21
4 -------------------------------------------
9 MH/01 Fix for bug #448, segfault in Dovecot authenticator when interface_address
10 is unset (happens when testing with -bh and -oMi isn't used). Thanks to
13 PH/01 Added a new log selector smtp_no_mail, to log SMTP sessions that do not
16 PH/02 In an ACL statement such as
18 deny dnslists = X!=127.0.0.2 : X=127.0.0.2
20 if a client was not listed at all, or was listed with a value other than
21 127.0.0.2, in the X list, but was listed with 127.0.0.2 in the Y list,
22 the condition was not true (as it should be), so access was not denied.
23 The bug was that the ! inversion was incorrectly passed on to the second
24 item. This has been fixed.
26 PH/03 Added additional dnslists conditions == and =& which are different from
27 = and & when the dns lookup returns more than one IP address.
29 PH/04 Added gnutls_require_{kx,mac,protocols} to give more control over the
30 cipher suites used by GnuTLS. These options are ignored by OpenSSL.
32 PH/05 After discussion on the list, added a compile time option ENABLE_DISABLE_
33 FSYNC, which compiles an option called disable_fsync that allows for
34 bypassing fsync(). The documentation is heavily laced with warnings.
36 SC/01 Updated eximstats to collate all SpamAssassin rejects into one bucket.
38 PH/06 Some tidies to the infrastructure of the Test Suite that is concerned
39 with the auxiliary C programs that it uses: (1) Arrange for BIND_8_COMPAT
40 to be defined when compiling on OSX (Darwin); (2) Tidies to the Makefile,
41 including adding "make clean"; (3) Added -fPIC when compiling the test
42 dynamically loaded module, to get rid of a warning.
44 MH/02 Fix for bug #451, causing paniclog entries to be written if a bounce
45 message fails, move_frozen_messages = true and ignore_bounce_errors_after
46 = 0s. The bug is otherwise harmless.
48 PH/07 There was a bug in the dovecot authenticator such that the value of
49 $auth1 could be overwritten, and so not correctly preserved, after a
50 successful authentication. This usually meant that the value preserved by
51 the server_setid option was incorrect.
53 PH/08 Added $smtp_count_at_connection_start, deliberately with a long name.
55 PH/09 Installed PCRE release 7.0.
57 PH/10 The acl_not_smtp_start ACL was, contrary to the documentation, not being
58 run for batched SMTP input. It is now run at the start of every message
59 in the batch. While fixing this I discovered that the process information
60 (output by running exiwhat) was not always getting set for -bs and -bS
61 input. This is fixed, and it now also says "batched" for BSMTP.
63 PH/11 Added control=no_pipelining.
65 PH/12 Added $sending_ip_address and $sending_port (mostly Magnus Holmgren's
66 patch, slightly modified), and move the expansion of helo_data till after
67 the connection is made in the smtp transport (so it can use these
70 PH/13 Added ${rfc2047d: to decoded RFC 2047 strings.
72 PH/14 Added log_selector = +pid.
74 PH/15 Flush SMTP output before delaying, unless control=no_delay_flush is set.
76 PH/16 Add ${if forany and ${if forall.
78 PH/17 Added dsn_from option to vary the From: line in DSNs.
84 PH/01 Two more bugs that were introduced by 4.64/PH/07, in addition to the one
85 fixed by 4.65/MH/01 (is this a record?) are fixed:
87 (i) An empty string was always treated as zero by the numeric comparison
88 operators. This behaviour has been restored.
90 (ii) It is documented that the numeric comparison operators always treat
91 their arguments as decimal numbers. This was broken in that numbers
92 starting with 0 were being interpreted as octal.
94 While fixing these problems I realized that there was another issue that
95 hadn't been noticed. Values of message_size_limit (both the global option
96 and the transport option) were treated as octal if they started with 0.
97 The documentation was vague. These values are now always treated as
98 decimal, and I will make that clear in the documentation.
104 TK/01 Disable default definition of HAVE_LINUX_SENDFILE. Clashes with
105 Linux large file support (_FILE_OFFSET_BITS=64) on older glibc
108 MH/01 Don't check that the operands of numeric comparison operators are
109 integers when their expansion is in "skipping" mode (fixes bug
110 introduced by 4.64-PH/07).
112 PH/01 If a system filter or a router generates more than SHRT_MAX (32767)
113 child addresses, Exim now panics and dies. Previously, because the count
114 is held in a short int, deliveries were likely to be lost. As such a
115 large number of recipients for a single message is ridiculous
116 (performance will be very, very poor), I have chosen to impose a limit
117 rather than extend the field.
123 TK/01 Bugzilla #401. Fix DK spooling code so that it can overwrite a
124 leftover -K file (the existence of which was triggered by #402).
125 While we were at it, introduced process PID as part of the -K
126 filename. This should rule out race conditions when creating
129 TK/02 Bugzilla #402. Apply patch from Simon Arlott, speeding up DK signing
130 processing considerably. Previous code took too long for large mails,
131 triggering a timeout which in turn triggers #401.
133 TK/03 Introduced HAVE_LINUX_SENDFILE to os.h-Linux. Currently only used
134 in the DK code in transports.c. sendfile() is not really portable,
135 hence the _LINUX specificness.
137 TF/01 In the add_headers option to the mail command in an Exim filter,
138 there was a bug that Exim would claim a syntax error in any
139 header after the first one which had an odd number of characters
142 PH/01 If a server that rejects MAIL FROM:<> was the target of a sender
143 callout verification, Exim cached a "reject" for the entire domain. This
144 is correct for most verifications, but it is not correct for a recipient
145 verification with use_sender or use_postmaster set, because in that case
146 the callout does not use MAIL FROM:<>. Exim now distinguishes the special
147 case of MAIL FROM:<> rejection from other early rejections (e.g.
148 rejection of HELO). When verifying a recipient using a non-null MAIL
149 address, the cache is ignored if it shows MAIL FROM:<> rejection.
150 Whatever the result of the callout, the value of the domain cache is
151 left unchanged (for any other kind of callout, getting as far as trying
152 RCPT means that the domain itself is ok).
154 PH/02 Tidied a number of unused variable and signed/unsigned warnings that
157 PH/03 On Solaris, an unexpectedly close socket (dropped connection) can
158 manifest itself as EPIPE rather than ECONNECT. When tidying away a
159 session, the daemon ignores ECONNECT errors and logs others; it now
160 ignores EPIPE as well.
162 PH/04 Applied Nico Erfurth's refactoring patch to tidy up mime.c
163 (quoted-printable decoding).
165 PH/05 Applied Nico Erfurth's refactoring patch to tidy up spool_mbox.c, and
166 later the small subsequent patch to fix an introduced bug.
168 PH/06 Installed the latest Cygwin Makefile from the Cygwin maintainer.
170 PH/07 There was no check for overflow in expansions such as ${if >{1}{4096M}}.
172 PH/08 An error is now given if message_size_limit is specified negative.
174 PH/09 Applied and tidied up Jakob Hirsch's patch for allowing ACL variables
175 to be given (somewhat) arbitrary names.
177 JJ/01 exipick 20060919.0, allow for arbitrary acl_ variables introduced
180 JJ/02 exipick 20060919.0, --show-vars args can now be regular expressions,
181 miscellaneous code fixes
183 PH/10 Added the log_reject_target ACL modifier to specify where to log
186 PH/11 Callouts were setting the name used for EHLO/HELO from $smtp_active_
187 hostname. This is wrong, because it relates to the incoming message (and
188 probably the interface on which it is arriving) and not to the outgoing
189 callout (which could be using a different interface). This has been
190 changed to use the value of the helo_data option from the smtp transport
191 instead - this is what is used when a message is actually being sent. If
192 there is no remote transport (possible with a router that sets up host
193 addresses), $smtp_active_hostname is used.
195 PH/12 Installed Andrey Panin's patch to add a dovecot authenticator. Various
196 tweaks were necessary in order to get it to work (see also 21 below):
197 (a) The code assumed that strncpy() returns a negative number on buffer
198 overflow, which isn't the case. Replaced with Exim's string_format()
200 (b) There were several signed/unsigned issues. I just did the minimum
201 hacking in of casts. There is scope for a larger refactoring.
202 (c) The code used strcasecmp() which is not a standard C function.
203 Replaced with Exim's strcmpic() function.
204 (d) The code set only $1; it now sets $auth1 as well.
205 (e) A simple test gave the error "authentication client didn't specify
206 service in request". It would seem that Dovecot has changed its
207 interface. Fortunately there's a specification; I followed it and
208 changed what the client sends and it appears to be working now.
210 PH/13 Added $message_headers_raw to provide the headers without RFC 2047
213 PH/14 Corrected misleading output from -bv when -v was also used. Suppose the
214 address A is aliased to B and C, where B exists and C does not. Without
215 -v the output is "A verified" because verification stops after a
216 successful redirection if more than one address is generated. However,
217 with -v the child addresses are also verified. Exim was outputting "A
218 failed to verify" and then showing the successful verification for C,
219 with its parentage. It now outputs "B failed to verify", showing B's
220 parentage before showing the successful verification of C.
222 PH/15 Applied Michael Deutschmann's patch to allow DNS black list processing to
223 look up a TXT record in a specific list after matching in a combined
226 PH/16 It seems that the options setting for the resolver (RES_DEFNAMES and
227 RES_DNSRCH) can affect the behaviour of gethostbyname() and friends when
228 they consult the DNS. I had assumed they would set it the way they
229 wanted; and indeed my experiments on Linux seem to show that in some
230 cases they do (I could influence IPv6 lookups but not IPv4 lookups).
231 To be on the safe side, however, I have now made the interface to
232 host_find_byname() similar to host_find_bydns(), with an argument
233 containing the DNS resolver options. The host_find_byname() function now
234 sets these options at its start, just as host_find_bydns() does. The smtp
235 transport options dns_qualify_single and dns_search_parents are passed to
236 host_find_byname() when gethostbyname=TRUE in this transport. Other uses
237 of host_find_byname() use the default settings of RES_DEFNAMES
238 (qualify_single) but not RES_DNSRCH (search_parents).
240 PH/17 Applied (a modified version of) Nico Erfurth's patch to make
241 spool_read_header() do less string testing, by means of a preliminary
242 switch on the second character of optional "-foo" lines. (This is
243 overdue, caused by the large number of possibilities that now exist.
244 Originally there were few.) While I was there, I also converted the
245 str(n)cmp tests so they don't re-test the leading "-" and the first
246 character, in the hope this might squeeze out yet more improvement.
248 PH/18 Two problems with "group" syntax in header lines when verifying: (1) The
249 flag allowing group syntax was set by the header_syntax check but not
250 turned off, possible causing trouble later; (2) The flag was not being
251 set at all for the header_verify test, causing "group"-style headers to
252 be rejected. I have now set it in this case, and also caused header_
253 verify to ignore an empty address taken from a group. While doing this, I
254 came across some other cases where the code for allowing group syntax
255 while scanning a header line wasn't quite right (mostly, not resetting
256 the flag correctly in the right place). These bugs could have caused
257 trouble for malformed header lines. I hope it is now all correct.
259 PH/19 The functions {pwcheck,saslauthd}_verify_password() are always called
260 with the "reply" argument non-NULL. The code, however (which originally
261 came from elsewhere) had *some* tests for NULL when it wrote to *reply,
262 but it didn't always do it. This confused somebody who was copying the
263 code for some other use. I have removed all the tests.
265 PH/20 It was discovered that the GnuTLS code had support for RSA_EXPORT, a
266 feature that was used to support insecure browsers during the U.S. crypto
267 embargo. It requires special client support, and Exim is probably the
268 only MTA that supported it -- and would never use it because real RSA is
269 always available. This code has been removed, because it had the bad
270 effect of slowing Exim down by computing (never used) parameters for the
271 RSA_EXPORT functionality.
273 PH/21 On the advice of Timo Sirainen, added a check to the dovecot
274 authenticator to fail if there's a tab character in the incoming data
275 (there should never be unless someone is messing about, as it's supposed
276 to be base64-encoded). Also added, on Timo's advice, the "secured" option
277 if the connection is using TLS or if the remote IP is the same as the
278 local IP, and the "valid-client-cert option" if a client certificate has
281 PH/22 As suggested by Dennis Davis, added a server_condition option to *all*
282 authenticators. This can be used for authorization after authentication
283 succeeds. (In the case of plaintext, it servers for both authentication
286 PH/23 Testing for tls_required and lost_connection in a retry rule didn't work
287 if any retry times were supplied.
289 PH/24 Exim crashed if verify=helo was activated during an incoming -bs
290 connection, where there is no client IP address to check. In this
291 situation, the verify now always succeeds.
293 PH/25 Applied John Jetmore's -Mset patch.
295 PH/26 Added -bem to be like -Mset, but loading a message from a file.
297 PH/27 In a string expansion for a processed (not raw) header when multiple
298 headers of the same name were present, leading whitespace was being
299 removed from all of them, but trailing whitespace was being removed only
300 from the last one. Now trailing whitespace is removed from each header
301 before concatenation. Completely empty headers in a concatenation (as
304 PH/28 Fixed bug in backwards-compatibility feature of PH/09 (thanks to John
305 Jetmore). It would have mis-read ACL variables from pre-4.61 spool files.
307 PH/29 [Removed. This was a change that I later backed out, and forgot to
308 correct the ChangeLog entry (that I had efficiently created) before
309 committing the later change.]
311 PH/30 Exim was sometimes attempting to deliver messages that had suffered
312 address errors (4xx response to RCPT) over the same connection as other
313 messages routed to the same hosts. Such deliveries are always "forced",
314 so retry times are not inspected. This resulted in far too many retries
315 for the affected addresses. The effect occurred only when there were more
316 hosts than the hosts_max_try setting in the smtp transport when it had
317 the 4xx errors. Those hosts that it had tried were not added to the list
318 of hosts for which the message was waiting, so if all were tried, there
319 was no problem. Two fixes have been applied:
321 (i) If there are any address or message errors in an SMTP delivery, none
322 of the hosts (tried or untried) are now added to the list of hosts
323 for which the message is waiting, so the message should not be a
324 candidate for sending over the same connection that was used for a
325 successful delivery of some other message. This seems entirely
326 reasonable: after all the message is NOT "waiting for some host".
327 This is so "obvious" that I'm not sure why it wasn't done
328 previously. Hope I haven't missed anything, but it can't do any
329 harm, as the worst effect is to miss an optimization.
331 (ii) If, despite (i), such a delivery is accidentally attempted, the
332 routing retry time is respected, so at least it doesn't keep
333 hammering the server.
335 PH/31 Installed Andrew Findlay's patch to close the writing end of the socket
336 in ${readsocket because some servers need this prod.
338 PH/32 Added some extra debug output when updating a wait-xxx database.
340 PH/33 The hint "could be header name not terminated by colon", which has been
341 given for certain expansion errors for a long time, was not being given
342 for the ${if def:h_colon_omitted{... case.
344 PH/34 The spec says: "With one important exception, whenever a domain list is
345 being scanned, $domain contains the subject domain." There was at least
346 one case where this was not true.
348 PH/35 The error "getsockname() failed: connection reset by peer" was being
349 written to the panic log as well as the main log, but it isn't really
350 panic-worthy as it just means the connection died rather early on. I have
351 removed the panic log writing for the ECONNRESET error when getsockname()
354 PH/36 After a 4xx response to a RCPT error, that address was delayed (in queue
355 runs only) independently of the message's sender address. This meant
356 that, if the 4xx error was in fact related to the sender, a different
357 message to the same recipient with a different sender could confuse
358 things. In particualar, this can happen when sending to a greylisting
359 server, but other circumstances could also provoke similar problems.
360 I have changed the default so that the retry time for these errors is now
361 based a combination of the sender and recipient addresses. This change
362 can be overridden by setting address_retry_include_sender=false in the
365 PH/37 For LMTP over TCP/IP (the smtp transport), error responses from the
366 remote server are returned as part of bounce messages. This was not
367 happening for LMTP over a pipe (the lmtp transport), but now it is the
368 same for both kinds of LMTP.
370 PH/38 Despite being documented as not happening, Exim was rewriting addresses
371 in header lines that were in fact CNAMEs. This is no longer the case.
373 PH/39 If -R or -S was given with -q<time>, the effect of -R or -S was ignored,
374 and queue runs started by the daemon processed all messages. This has
375 been fixed so that -R and -S can now usefully be given with -q<time>.
377 PH/40 Import PCRE release 6.7 (fixes some bugs).
379 PH/41 Add bitwise logical operations to eval (courtesy Brad Jorsch).
381 PH/42 Give an error if -q is specified more than once.
383 PH/43 Renamed the variables $interface_address and $interface_port as
384 $received_ip_address and $received_port, to make it clear that these
385 values apply to message reception, and not to the outgoing interface when
386 a message is delivered. (The old names remain recognized, of course.)
388 PH/44 There was no timeout on the connect() call when using a Unix domain
389 socket in the ${readsocket expansion. There now is.
391 PH/45 Applied a modified version of Brad Jorsch's patch to allow "message" to
392 be meaningful with "accept".
394 SC/01 Eximstats V1.43
395 Bug fix for V1.42 with -h0 specified. Spotted by Chris Lear.
397 SC/02 Eximstats V1.44
398 Use a glob alias rather than an array ref in the generated
399 parser. This improves both readability and performance.
401 SC/03 Eximstats V1.45 (Marco Gaiarin / Steve Campbell)
402 Collect SpamAssassin and rejection statistics.
403 Don't display local sender or destination tables unless
404 there is data to show.
405 Added average volumes into the top table text output.
407 SC/04 Eximstats V1.46
408 Collect data on the number of addresses (recipients)
409 as well as the number of messages.
411 SC/05 Eximstats V1.47
412 Added 'Message too big' to the list of mail rejection
413 reasons (thanks to Marco Gaiarin).
415 SC/06 Eximstats V1.48
416 Mainlog lines which have GMT offsets and are too short to
417 have a flag are now skipped.
419 SC/07 Eximstats V1.49 (Alain Williams)
420 Added the -emptyok flag.
422 SC/08 Eximstats V1.50
423 Fixes for obtaining the IP address from reject messages.
425 JJ/03 exipick.20061117.2, made header handling as similar to exim as possible
426 (added [br]h_ prefixes, implemented RFC2047 decoding. Fixed
427 whitesspace changes from 4.64-PH/27
429 JJ/04 exipick.20061117.2, fixed format and added $message_headers_raw to
432 JJ/05 exipick.20061117.2, bug fixes (error out sooner when invalid criteria
433 are found, allow negative numbers in numeric criteria)
435 JJ/06 exipick.20061117.2, added new $message_body_missing variable
437 JJ/07 exipick.20061117.2, added $received_ip_address and $received_port
438 to match changes made in 4.64-PH/43
440 PH/46 Applied Jori Hamalainen's patch to add features to exiqsumm.
442 PH/47 Put in an explicit test for a DNS lookup of an address record where the
443 "domain" is actually an IP address, and force a failure. This locks out
444 those revolvers/nameservers that support "A-for-A" lookups, in
445 contravention of the specifications.
447 PH/48 When a host name was looked up from an IP address, and the subsequent
448 forward lookup of the name timed out, the host name was left in
449 $sender_host_name, contrary to the specification.
451 PH/49 Although default lookup types such as lsearch* or cdb*@ have always been
452 restricted to single-key lookups, Exim was not diagnosing an error if
453 * or *@ was used with a query-style lookup.
455 PH/50 Increased the value of DH_BITS in tls-gnu.c from 768 to 1024.
457 MH/01 local_scan ABI version incremented to 1.1. It should have been updated
458 long ago, but noone interested enough thought of it. Let's just say that
459 the "1.1" means that there are some new functions that weren't there at
460 some point in the past.
462 PH/51 Error processing for expansion failure of helo_data from an smtp
463 transport during callout processing was broken.
465 PH/52 Applied John Jetmore's patch to allow tls-on-connect and STARTTLS to be
466 tested/used via the -bh/-bhc/-bs options.
468 PH/53 Added missing "#include <time.h>" to pcre/pcretest.c (this was a PCRE
469 bug, fixed in subsequent PCRE releases).
471 PH/54 Applied Robert Bannocks' patch to avoid a problem with references that
472 arises when using the Solaris LDAP libraries (but not with OpenLDAP).
474 PH/55 Check for a ridiculously long file name in exim_dbmbuild.
480 SC/01 Use a glob alias rather than an array ref in eximstats generated
481 parser. This improves both readability and performance.
483 SC/02 Collect SpamAssassin and rejection statistics in eximstats.
484 Don't display local sender or destination tables in eximstats unless
485 there is data to show.
486 Added average volumes into the eximstats top table text output.
488 SC/03 Collect data on the number of addresses (recipients) as well
489 as the number of messages in eximstats.
491 TF/01 Correct an error in the documentation for the redirect router. Exim
492 does (usually) call initgroups() when daemonizing.
494 TF/02 Call initgroups() when dropping privilege in exim.c, so that Exim runs
495 with consistent privilege compared to when running as a daemon.
497 TF/03 Note in the spec that $authenticated_id is not set for local
498 submissions from trusted users.
500 TF/04 The ratelimit per_rcpt option now works correctly in acl_not_smtp.
501 Thanks to Dean Brooks <dean@iglou.com> for the patch.
503 TF/05 Make it easier to get SMTP authentication and TLS/SSL support working
504 by adding some example configuration directives to the default
505 configuration file. A little bit of work is required to uncomment the
506 directives and define how usernames and passwords are checked, but
507 there is now a framework to start from.
509 PH/01 Added #define LDAP_DEPRECATED 1 to ldap.c because some of the "old"
510 functions that Exim currently uses aren't defined in ldap.h for OpenLDAP
511 without this. I don't know how relevant this is to other LDAP libraries.
513 PH/02 Add the verb name to the "unknown ACL verb" error.
515 PH/03 Magnus Holmgren's patch for filter_prepend_home.
517 PH/03 Fixed Bugzilla #101: macro definition between ACLs doesn't work.
519 PH/04 Applied Magnus Holmgren's patch to fix Bugzilla #98: transport's home
520 directory not expanded when it should be if an expanded home directory
521 was set for the address (which is overridden by the transport).
523 PH/05 Applied Alex Kiernan's patch to fix Bugzilla #99: a problem with
526 PH/06 Added acl_not_smtp_start, based on Johannes Berg's patch, and set the
527 bit to forbid control=suppress_local_fixups in the acl_not_smtp ACL,
528 because it is too late at that time, and has no effect.
530 PH/07 Changed ${quote_pgsql to quote ' as '' instead of \' because of a
531 security issue with \' (bugzilla #107). I could not use the
532 PQescapeStringConn() function, because it needs a PGconn value as one of
535 PH/08 When testing addresses using -bt, indicate those final addresses that
536 are duplicates that would not cause an additional delivery. At least one
537 person was confused, thinking that -bt output corresponded to deliveries.
538 (Suppressing duplicates isn't a good idea as you lose the information
539 about possibly different redirections that led to the duplicates.)
541 PH/09 Applied patch from Erik to use select() instead of poll() in spam.c on
542 systems where poll() doesn't work, in particular OS X.
544 PH/10 Added more information to debugging output for retry time not reached.
546 PH/11 Applied patch from Arkadiusz Miskiewicz to apply a timeout to read
547 operations in malware.c.
549 PH/12 Applied patch from Magnus Holmgren to include the "h" tag in Domain Keys
552 PH/13 If write_rejectlog was set false when logging was sent to syslog with
553 syslog_duplication set false, log lines that would normally be written
554 both the the main log and to the reject log were not written to syslog at
557 PH/14 In the default configuration, change the use of "message" in ACL warn
558 statements to "add_header".
560 PH/15 Diagnose a filter syntax error for "seen", "unseen", or "noerror" if not
561 not followed by a command (e.g. "seen endif").
563 PH/16 Recognize SMTP codes at the start of "message" in ACLs and after :fail:
564 and :defer: in a redirect router. Add forbid_smtp_code to suppress the
567 PH/17 Added extra conditions to the default value of delay_warning_condition
571 { !eq{$h_list-id:$h_list-post:$h_list-subscribe:}{} } \
572 { match{$h_precedence:}{(?i)bulk|list|junk} } \
573 { match{$h_auto-submitted:}{(?i)auto-generated|auto-replied} } \
576 The Auto-Submitted: and various List- headers are standardised, whereas I
577 don't think Precedence: ever was.
579 PH/18 Refactored debugging code in route_finduser() to show more information,
580 in particular, the error code if getpwnam() issues one.
582 PH/19 Added PQsetClientEncoding(conn, "SQL_ASCII") to the pgsql code module.
583 This is apparently needed in addition to the PH/07 change above to avoid
584 any possible encoding problems.
586 PH/20 Perl can change the locale. Exim was resetting it after a ${perl call,
587 but not after initializing Perl.
589 PH/21 Added a call to PQsetNoticeProcessor() to catch pgsql "notices" and
590 output them only if debugging. By default they are written stderr,
591 apparently, which is not desirable.
593 PH/22 Added Alain Williams' LDAP patch to support setting REFERRALS=off on
596 JJ/01 exipick: added --reverse (and -R synonym), --random, --size, --sort and
599 JJ/02 exipick: rewrote --help documentation to hopefully make more clear.
601 PH/23 Made -oMaa and -oMt work with -bh and -bs to pretend the connection is
602 authenticated or an ident call has been made. Suppress the default
603 values for $authenticated_id and $authenticated_sender (but permit -oMai
604 and -oMas) when testing with -bh.
606 PH/24 Re-jigged the order of the tests in the default configuration so that the
607 tests for valid domains and recipients precede the DNS black list and CSA
608 tests, on the grounds that those ones are more expensive.
610 PH/25 Exim was not testing for a space following SMTP commands such as EHLO
611 that require one. Thus, EHLORHUBARB was interpreted as a valid command.
612 This bug exists in every version of Exim that I still have, right back to
615 PH/26 (n)wildlsearch lookups are documented as being done case-insensitively.
616 However, an attempt to turn on case-sensitivity in a regex key by
617 including (?-i) didn't work because the subject string was already
618 lowercased, and the effects were non-intuitive. It turns out that a
619 one-line patch can be used to allow (?-i) to work as expected.
625 TF/01 Fix the add_header change below (4.61 PH/55) which had a bug that (amongst
626 other effects) broke the use of negated acl sub-conditions.
628 PH/01 ${readsocket now supports Internet domain sockets (modified John Jetmore
631 PH/02 When tcp-wrappers is called from Exim, it returns only "deny" or "allow".
632 "Deny" causes Exim to reject the incoming connection with a 554 error.
633 Unfortunately, if there is a major crisis, such as a disk failure,
634 tcp-wrappers gives "deny", whereas what one would like would be some
635 kind of temporary error. A kludge has been added to help with this.
636 Before calling hosts_ctl(), errno is set zero. If the result is "deny", a
637 554 error is used if errno is still zero or contains ENOENT (which occurs
638 if either of the /etc/hosts.{allow,deny} files is missing). Otherwise, a
641 PH/03 Add -lutil to the default FreeBSD LIBS setting.
643 PH/04 Change PH/19 for 4.61 was too wide. It should not be applied to host
644 errors. Otherwise a message that provokes a temporary error (when other
645 messages do not) can cause a whole host to time out.
647 PH/05 Batch deliveries by appendfile and pipe transports did not work when the
648 addresses were routed directly to files or pipes from a redirect router.
649 File deliveries just didn't batch; pipe deliveries might have suffered
652 PH/06 A failure to get a lock for a hints database would erroneously always say
653 "Failed to get write lock", even when it was really a read lock.
655 PH/07 The appendfile transport was creating MBX lock files with a fixed mode
656 of 0600. This has been changed to use the value of the lockfile_mode
657 option (which defaults to 0600).
659 PH/08 Applied small patch from the Sieve maintainer.
661 PH/09 If maildir_quota_directory_regex was set to exclude (say) the .Trash
662 folder from quota calculations, a direct delivery into this folder messed
663 up the contents of the maildirsize file. This was because the regex was
664 used only to exclude .Trash (or whatever) when the size of the mailbox
665 was calculated. There was no check that a delivery was happening into an
666 excluded directory. This bug has been fixed by ignoring all quota
667 processing for deliveries into excluded directories.
669 PH/10 Added the maildirfolder_create_regex option to appendfile.
675 PH/01 The code for finding all the local interface addresses on a FreeBSD
676 system running IPv6 was broken. This may well have applied to all BSD
677 systems, as well as to others that have similar system calls. The broken
678 code found IPv4 interfaces correctly, but gave incorrect values for the
679 IPv6 interfaces. In particular, ::1 was not found. The effect in Exim was
680 that it would not match correctly against @[] and not recognize the IPv6
683 PH/02 The ipliteral router was not recognizing addresses of the form user@
684 [ipv6:....] because it didn't know about the "ipv6:" prefix.
686 PH/03 Added disable_ipv6.
688 PH/04 Changed $reply_address to use the raw form of the headers instead of the
689 decoded form, because it is most often used to construct To: headers
690 lines in autoreplies, and the decoded form may well be syntactically
691 invalid. However, $reply_address has leading white space removed, and all
692 newlines turned into spaces so that the autoreply transport does not
695 PH/05 If group was specified without a user on a router, and no group or user
696 was specified on a transport, the group from the router was ignored.
698 PH/06 Increased the number of ACL variables to 20 of each type, and arranged
699 for visible compile-time settings that can be used to change these
700 numbers, for those that want even more. Backwards compatibility with old
701 spool files has been maintained. However, going back to a previous Exim
702 release will lost any variables that are in spool files.
704 PH/07 Two small changes when running in the test harness: increase delay when
705 passing a TCP/IP connection to a new process, in case the original
706 process has to generate a bounce, and remove special handling of
707 127.0.0.2 (sic), which is no longer necessary.
709 PH/08 Changed debug output of dbfn_open() flags from numbers to names, so as to
710 be the same on different OS.
712 PH/09 Moved a debug statement in filter processing to avoid a race problem when
715 JJ/01 exipick: fixed bug where -b (brief) output option showed "Vars:"
716 whether --show-vars was specified or not
718 JJ/02 exipick: Added support for new ACL variable spool format introduced
721 PH/10 Fixed another bug related to PH/04 above: if an incoming message had a
722 syntactically invalid From: or Reply-to: line, and a filter used this to
723 generate an autoreply, and therefore failed to obtain an address for the
724 autoreply, Exim could try to deliver to a non-existent relative file
725 name, causing unrelated and misleading errors. What now happens is that
726 it logs this as a hard delivery error, but does not attempt to create a
729 PH/11 The exinext utility has a -C option for testing purposes, but although
730 the given file was scanned by exinext itself; it wasn't being passed on
731 when Exim was called.
733 PH/12 In the smtp transport, treat an explicit ECONNRESET error the same as
734 an end-of-file indication when reading a command response.
736 PH/13 Domain literals for IPv6 were not recognized unless IPv6 support was
737 compiled. In many other places in Exim, IPv6 addresses are always
738 recognized, so I have changed this. It also means that IPv4 domain
739 literals of the form [IPV4:n.n.n.n] are now always recognized.
741 PH/14 When a uid/gid is specified for the queryprogram router, it cannot be
742 used if the router is not running as root, for example, when verifying at
743 ACL time, or when using -bh. The debugging output from this situation was
744 non-existent - all you got was a failure to exec. I have made two
747 (a) Failures to set uid/gid, the current directory, or a process leader
748 in a subprocess such as that created by queryprogram now generate
749 suitable debugging ouput when -d is set.
751 (b) The queryprogram router detects when it is not running as root,
752 outputs suitable debugging information if -d is set, and then runs
753 the subprocess without attempting to change uid/gid.
755 PH/15 Minor change to Makefile for building test_host (undocumented testing
758 PH/16 As discussed on the list in Nov/Dec: Exim no longer looks at the
759 additional section of a DNS packet that returns MX or SRV records.
760 Instead, it always explicitly searches for A/AAAA records. This avoids
761 major problems that occur when a DNS server includes only records of one
762 type (A or AAAA) in an MX/SRV packet. A byproduct of this change has
763 fixed another bug: if SRV records were looked up and the corresponding
764 address records were *not* found in the additional section, the port
765 values from the SRV records were lost.
767 PH/17 If a delivery to a pipe, file, or autoreply was deferred, Exim was not
768 using the correct key (the original address) when searching the retry
769 rules in order to find which one to use for generating the retry hint.
771 PH/18 If quota_warn_message contains a From: header, Exim now refrains from
772 adding the default one. Similarly, if it contains a Reply-To: header, the
773 errors_reply_to option, if set, is not used.
775 PH/19 When calculating a retry time, Exim used to measure the "time since
776 failure" by looking at the "first failed" field in the retry record. Now
777 it does not use this if it is later than than the arrival time of the
778 message. Instead it uses the arrival time. This makes for better
779 behaviour in cases where some deliveries succeed, thus re-setting the
780 "first failed" field. An example is a quota failure for a huge message
781 when small messages continue to be delivered. Without this change, the
782 "time since failure" will always be short, possible causing more frequent
783 delivery attempts for the huge message than are intended.
784 [Note: This change was subsequently modified - see PH/04 for 4.62.]
786 PH/20 Added $auth1, $auth2, $auth3 to contain authentication data (as well as
787 $1, $2, $3) because the numerical variables can be reset during some
788 expansion items (e.g. "match"), thereby losing the authentication data.
790 PH/21 Make -bV show the size of off_t variables so that the test suite can
791 decide whether to run tests for quotas > 2G.
793 PH/22 Test the values given for quota, quota_filecount, quota_warn_threshold,
794 mailbox_size, and mailbox_filecount in the appendfile transport. If a
795 filecount value is greater than 2G or if a quota value is greater than 2G
796 on a system where the size of off_t is not greater than 4, a panic error
799 PH/23 When a malformed item such as 1.2.3/24 appears in a host list, it can
800 never match. The debug and -bh output now contains an explicit error
801 message indicating a malformed IPv4 address or mask.
803 PH/24 An host item such as 1.2.3.4/abc was being treated as the IP address
804 1.2.3.4 without a mask. Now it is not recognized as an IP address, and
807 PH/25 Do not write to syslog when running in the test harness. The only
808 occasion when this arises is a failure to open the main or panic logs
809 (for which there is an explicit test).
811 PH/26 Added the /no_tell option to "control=freeze".
813 PH/27 If a host name lookup failed very early in a connection, for example, if
814 the IP address matched host_lookup and the reverse lookup yielded a name
815 that did not have a forward lookup, an error message of the form "no IP
816 address found for host xxx.xxx.xxx (during SMTP connection from NULL)"
817 could be logged. Now it outputs the IP address instead of "NULL".
819 PH/28 An enabling patch from MH: add new function child_open_exim2() which
820 allows the sender and the authenticated sender to be set when
821 submitting a message from within Exim. Since child_open_exim() is
822 documented for local_scan(), the new function should be too.
824 PH/29 In GnuTLS, a forced expansion failure for tls_privatekey was not being
825 ignored. In both GnuTLS and OpenSSL, an expansion of tls_privatekey that
826 results in an empty string is now treated as unset.
828 PH/30 Fix eximon buffer overflow bug (Bugzilla #73).
830 PH/31 Added sender_verify_fail logging option.
832 PH/32 In November 2003, the code in Exim that added an empty Bcc: header when
833 needed by RFC 822 but not by RFC 2822 was commented out. I have now
834 tidied the source and removed it altogether.
836 PH/33 When a queue run was abandoned because the load average was too high, a
837 log line was always written; now it is written only if the queue_run log
838 selector is set. In addition, the log line for abandonment now contains
839 information about the queue run such as the pid. This is always present
840 in "start" and "stop" lines but was omitted from the "abandon" line.
842 PH/34 Omit spaces between a header name and the colon in the error message that
843 is given when verify = headers_syntax fails (if there are lots of them,
844 the message gets confusing).
846 PH/35 Change the default for dns_check_names_pattern to allow slashes within
847 names, as there are now some PTR records that contain slashes. This check
848 is only to protect against broken name servers that fall over on strange
849 characters, so the fact that it applies to all lookups doesn't matter.
851 PH/36 Now that the new test suite is complete, we can remove some of the
852 special code in Exim that was needed for the old test suite. For example,
853 sorting DNS records because real resolvers return them in an arbitrary
854 order. The new test suite's fake resolver always returns records in the
857 PH/37 When running in the test harness, use -odi for submitted messages (e.g.
858 bounces) except when queue_only is set, to avoid logging races between
859 the different processes.
861 PH/38 Panic-die if .include specifies a non-absolute path.
863 PH/39 A tweak to the "H" retry rule from its user.
865 JJ/03 exipick: Removed parentheses from 'next' and 'last' calls that specified
866 a label. They prevented compilation on older perls.
868 JJ/04 exipick: Refactored code to prevent implicit split to @_ which caused
869 a warning to be raised on newish perls.
871 JJ/05 exipick: Fixed bug where -bpc always showed a count of all messages
872 on queue. Changes to match documented behaviour of showing count of
873 messages matching specified criteria.
875 PH/40 Changed the default ident timeout from 30s to 5s.
877 PH/41 Added support for the use of login_cap features, on those BSD systems
878 that have them, for controlling the resources used by pipe deliveries.
880 PH/42 The content-scanning code uses fopen() to create files in which to put
881 message data. Previously it was not paying any attention to the mode of
882 the files. Exim runs with umask(0) because the rest of the code creates
883 files with open(), and sets the required mode explicitly. Thus, these
884 files were ending up world-writeable. This was not a big issue, because,
885 being within the spool directory, they were not world-accessible. I have
886 created a function called modefopen, which takes an additional mode
887 argument. It sets umask(777), creates the file, chmods it to the required
888 mode, then resets the umask. All the relevant calls to fopen() in the
889 content scanning code have been changed to use this function.
891 PH/43 If retry_interval_max is set greater than 24 hours, it is quietly reset
892 to 24 hours. This avoids potential overflow problems when processing G
893 and H retry rules. I suspect nobody ever tinkers with this value.
895 PH/44 Added STRIP_COMMAND=/usr/bin/strip to the FreeBSD Makefile.
897 PH/45 When the plaintext authenticator is running as a client, the server's
898 challenges are checked to ensure they are valid base64 strings. By
899 default, the authentication attempt is cancelled if an invalid string is
900 received. Setting client_ignore_invalid_base64 true ignores these errors.
901 The decoded challenge strings are now placed in $auth1, $auth2, etc. as
902 they are received. Thus, the responses can be made to depend on the
903 challenges. If an invalid string is ignored, an empty string is placed in
906 PH/46 Messages that are created by the autoreply transport now contains a
907 References: header, in accordance with RFCs 2822 and 3834.
909 PH/47 Added authenticated_sender_force to the smtp transport.
911 PH/48 The ${prvs expansion was broken on systems where time_t was long long.
913 PH/49 Installed latest patch from the Sieve maintainer.
915 PH/50 When an Exim quota was set without a file count quota, and mailbox_size
916 was also set, the appendfile transport was unnecessarily scanning a
917 directory of message files (e.g. for maildir delivery) to find the count
918 of files (along with the size), even though it did not need this
919 information. It now does the scan only if it needs to find either the
920 size of the count of files.
922 PH/51 Added ${time_eval: to convert Exim time strings into seconds.
924 PH/52 Two bugs concerned with error handling when the smtp transport is
927 (i) Exim was not creating retry information for temporary errors given
928 for individual recipients after the DATA command when the smtp transport
929 was used in LMTP mode. This meant that they could be retried too
930 frequently, and not timed out correctly.
932 (ii) Exim was setting the flag that allows error details to be returned
933 for LMTP errors on RCPT commands, but not for LMTP errors for individual
934 recipients that were returned after the DATA command.
936 PH/53 This is related to PH/52, but is more general: for any failing address,
937 when detailed error information was permitted to be returned to the
938 sender, but the error was temporary, then after the final timeout, only
939 "retry timeout exceeded" was returned. Now it returns the full error as
940 well as "retry timeout exceeded".
942 PH/54 Added control=allow_auth_unadvertised, as it seems there are clients that
943 do this, and (what is worse) MTAs that accept it.
945 PH/55 Added the add_header modified to ACLs. The use of "message" with "warn"
946 will now be deprecated.
948 PH/56 New os.c-cygwin from the Cygwin maintainer.
950 JJ/06 exipick: added --unsorted option to allow unsorted output in all output
951 formats (previously only available in exim formats via -bpr, -bpru,
952 and -bpra. Now also available in native and exiqgrep formats)
954 JJ/07 exipick: added --freeze and --thaw options to allow faster interaction
955 with very large, slow to parse queues
957 JJ/08 exipick: added ! as generic prefix to negate any criteria format
959 JJ/09 exipick: miscellaneous performance enhancements (~24% improvements)
961 PH/57 Tidies in SMTP dialogue display in debug output: (i) It was not showing
962 responses to authentication challenges, though it was showing the
963 challenges; (ii) I've removed the CR characters from the debug output for
966 PH/58 Allow for the insertion of a newline as well as a space when a string
967 is turned into more than one encoded-word during RFC 2047 encoding. The
968 Sieve code now uses this.
970 PH/59 Added the following errors that can be detected in retry rules: mail_4xx,
971 data_4xx, lost_connection, tls_required.
973 PH/60 When a VRFY deferred or FAILED, the log message rather than the user
974 message was being sent as an SMTP response.
976 PH/61 Add -l and -k options to exicyclog.
978 PH/62 When verifying, if an address was redirected to one new address, so that
979 verification continued, and the new address failed or deferred after
980 having set something in $address_data, the value of $address_data was not
981 passed back to the ACL. This was different to the case when no
982 redirection occurred. The value is now passed back in both cases.
984 PH/63 Changed the macro HAVE_LOGIN_CAP (see PH/41 for this release above) to
985 HAVE_SETCLASSRESOURCES because there are different APIs in use that all
986 use login_cap.h, so on its own it isn't the distinguishing feature. The
987 new name refers directly to the setclassresources() function.
989 PH/65 Added configuration files for NetBSD3.
991 PH/66 Updated OS/Makefile-HP-UX for gcc 4.1.0 with HP-UX 11.
993 PH/67 Fixed minor infelicity in the sorting of addresses to ensure that IPv6
994 is preferred over IPv4.
996 PH/68 The bounce_return_message and bounce_return_body options were not being
997 honoured for bounces generated during the reception of non-SMTP messages.
998 In particular, this applied to messages rejected by the ACL. This bug has
999 been fixed. However, if bounce_return_message is true and bounce_return_
1000 body is false, the headers that are returned for a non-SMTP message
1001 include only those that have been read before the error was detected.
1002 (In the case of an ACL rejection, they have all been read.)
1004 PH/69 The HTML version of the specification is now built in a directory called
1005 spec_html instead of spec.html, because the latter looks like a path with
1006 a MIME-type, and this confuses some software.
1008 PH/70 Catch two compiler warnings in sieve.c.
1010 PH/71 Fixed an obscure and subtle bug (thanks Alexander & Matthias). The
1011 function verify_get_ident() calls ip_connect() to connect a socket, but
1012 if the "connect()" function timed out, ip_connect() used to close the
1013 socket. However, verify_get_ident() also closes the socket later, and in
1014 between Exim writes to the log, which may get opened at this point. When
1015 the socket was closed in ip_connect(), the log could get the same file
1016 descriptor number as the socket. This naturally causes chaos. The fix is
1017 not to close the socket in ip_connect(); the socket should be closed by
1018 the function that creates it. There was only one place in the code where
1019 this was missing, in the iplookup router, which I don't think anybody now
1020 uses, but I've fixed it anyway.
1022 PH/72 Make dns_again_means_nonexist apply to lookups using gethostbyname() as
1023 well as to direct DNS lookups. Otherwise the handling of names in host
1024 lists is inconsistent and therefore confusing.
1030 PH/01 Two changes to the default runtime configuration:
1032 (1) Move the checks for relay_from_hosts and authenticated clients from
1033 after to before the (commented out) DNS black list checks.
1035 (2) Add control=submission to the relay_from_hosts and authenticated
1036 clients checks, on the grounds that messages accepted by these
1037 statements are most likely to be submissions.
1039 PH/02 Several tidies to the handling of ${prvs and ${prvscheck:
1041 (1) Generate an error if the third argument for the ${prvs expansion is
1044 (2) Treat a missing third argument of ${prvscheck as if it were an empty
1047 (3) Reset the variables that are obtained from the first argument of
1048 ${prvscheck and used in the second argument before leaving the code,
1049 because their memory is reclaimed, so using them afterwards may do
1052 (4) Tidy up the code for expanding the arguments of ${prvscheck one by
1053 one (it's much easier than Tom thought :-).
1055 (5) Because of (4), we can now allow for the use of $prvscheck_result
1056 inside the third argument.
1058 PH/03 For some reason, the default setting of PATH when running a command from
1059 a pipe transport was just "/usr/bin". I have changed it to
1062 PH/04 SUPPORT_TRANSLATE_IP_ADDRESS and MOVE_FROZEN_MESSAGES did not cause
1063 anything to be listed in the output from -bV.
1065 PH/05 When a filter generated an autoreply, the entire To: header line was
1066 quoted in the delivery log line, like this:
1068 => >A.N.Other <ano@some.domain> <original@ddress> ...
1070 This has been changed so that it extracts the operative address. There
1071 may be more than one such address. If so, they are comma-separated, like
1074 => >ano@some.domain,ona@other.domain <original@ddress> ...
1076 PH/06 When a client host used a correct literal IP address in a HELO or EHLO
1077 command, (for example, EHLO [1.2.3.4]) and the client's IP address was
1078 not being looked up in the rDNS to get a host name, Exim was showing the
1079 IP address twice in Received: lines, even though the IP addresses were
1080 identical. For example:
1082 Received: from [1.2.3.4] (helo=[1.2.3.4])
1084 However, if the real host name was known, it was omitting the HELO data
1085 if it matched the actual IP address. This has been tidied up so that it
1086 doesn't show the same IP address twice.
1088 PH/07 When both +timestamp and +memory debugging was on, the value given by
1089 $tod_xxx expansions could be wrong, because the tod_stamp() function was
1090 called by the debug printing, thereby overwriting the timestamp buffer.
1091 Debugging no longer uses the tod_stamp() function when +timestamp is set.
1093 PH/08 When the original message was included in an autoreply transport, it
1094 always said "this is a copy of the message, including all the headers",
1095 even if body_only or headers_only was set. It now gives an appropriate
1098 PH/09 Applied a patch from the Sieve maintainer which:
1100 o fixes some comments
1101 o adds the (disabled) notify extension core
1102 o adds some debug output for the result of if/elsif tests
1103 o points to the current vacation draft in the documentation
1104 and documents the missing references header update
1108 o fixes a bug in processing the envelope test (when testing
1109 multiple envelope elements, the last element determinted the
1112 PH/10 Exim was violating RFC 3834 ("Recommendations for Automatic Responses to
1113 Electronic Mail") by including:
1115 Auto-submitted: auto-generated
1117 in the messages that it generates (bounce messages and others, such as
1118 warnings). In the case of bounce messages for non-SMTP mesages, there was
1119 also a typo: it was using "Auto_submitted" (underscore instead of
1120 hyphen). Since every message generated by Exim is necessarily in response
1121 to another message, thes have all been changed to:
1123 Auto-Submitted: auto-replied
1125 in accordance with these statements in the RFC:
1127 The auto-replied keyword:
1129 - SHOULD be used on messages sent in direct response to another
1130 message by an automatic process,
1132 - MUST NOT be used on manually-generated messages,
1134 - MAY be used on Delivery Status Notifications (DSNs) and Message
1135 Disposition Notifications (MDNs),
1137 - MUST NOT be used on messages generated by automatic or periodic
1138 processes, except for messages which are automatic responses to
1141 PH/11 Added "${if def:sender_address {(envelope-from <$sender_address>)\n\t}}"
1142 to the default Received: header definition.
1144 PH/12 Added log selector acl_warn_skipped (default on).
1146 PH/13 After a successful wildlsearch lookup, discard the values of numeric
1147 variables because (a) they are in the wrong storage pool and (b) even if
1148 they were copied, it wouldn't work properly because of the caching.
1150 PH/14 Add check_rfc2047_length to disable enforcement of RFC 2047 length
1151 checking when decoding. Apparently there are clients that generate
1152 overlong encoded strings. Why am I not surprised?
1154 PH/15 If the first argument of "${if match_address" was not empty, but did not
1155 contain an "@" character, Exim crashed. Now it writes a panic log message
1156 and treats the condition as false.
1158 PH/16 In autoreply, treat an empty string for "once" the same as unset.
1160 PH/17 A further patch from the Sieve maintainer: "Introduce the new Sieve
1161 extension "envelope-auth". The code is finished and in agreement with
1162 other implementations, but there is no documentation so far and in fact,
1163 nobody wrote the draft yet. This extension is currently #undef'ed, thus
1164 not changing the active code.
1166 Print executed "if" and "elsif" statements when debugging is used. This
1167 helps a great deal to understand what a filter does.
1169 Document more things not specified clearly in RFC3028. I had all this
1170 sorted out, when out of a sudden new issues came to my mind. Oops."
1172 PH/18 Exim was not recognizing the "net-" search type prefix in match_ip lists
1175 PH/19 Exim expands the IPv6 address given to -bh to its full non-abbreviated
1176 canonical form (as documented). However, after a host name lookup from
1177 the IP address, check_host() was doing a simple string comparison with
1178 addresses acquired from the DNS when checking that the found name did
1179 have the original IP as one of its addresses. Since any found IPv6
1180 addresses are likely to be in abbreviated form, the comparison could
1181 fail. Luckily, there already exists a function for doing the comparison
1182 by converting both addresses to binary, so now that is used instead of
1183 the text comparison.
1185 PH/20 There was another similar case to PH/19, when a complete host name was
1186 given in a host list; looking up its IP address could give an abbreviated
1187 form, whereas the current host's name might or might not be abbreviated.
1188 The same fix has been applied.
1194 PH/01 The ${base62: operator adjusted itself to base 36 when BASE_62 was
1195 set to 36 (for Darwin and Cygwin), but the ${base62d: operator did not.
1198 PH/02 Two minor problems detected in Cygwin: the os.{c,h} files had lost */ on
1199 the CVS lines, and there was a missing #if HAVE_IPV6 in host.c.
1201 PH/03 Typo: missing ".o" in src/pcre/Makefile.
1203 PH/04 Tighten up "personal" tests: Instead of testing for any "List-"
1204 header line, restrict the check to what is listed in RFCs 2369 and 2929.
1205 Also, for "Auto-Submitted", treat anything other than "no" as
1206 non-personal, in accordance with RFC 3834. (Previously it treated
1207 anything starting "auto-" as non-personal.)
1209 TF/01 The control=submission/name=... option had a problem with syntax
1210 errors if the name included a slash character. The /name= option
1211 now slurps the rest of the string, so it can include any characters
1212 but it must come last in the list of options (after /sender_retain
1215 PH/05 Some modifications to the interface to the fake nameserver for the new
1223 TK/01 Added the "success_on_redirect" address verification option. See
1224 NewStuff for rationale and an example.
1226 PH/01 Added support for SQLite, basic code supplied by David Woodhouse.
1228 PH/02 Patch to exigrep to allow it to work on syslog lines.
1230 PH/03 When creating an mbox file for a virus/spam scan, use fseek() instead of
1231 fread() to skip over the body file's header line, because in Cygwin the
1232 header line is locked and is inaccessible.
1234 PH/04 Added $message_exim_id, ultimately to replace $message_id (they will both
1235 co-exist for some time) to make it clear that it is the Exim ID that is
1236 referenced, not the Message-ID: header line.
1238 PH/05 Replaced all Tom's calls to snprintf() with calls to the internal
1239 string_format() function, because snprintf() does not exist on all
1242 PH/06 The use of forbid_filter_existstest now also locks out the use of the
1243 ${stat: expansion item.
1245 PH/07 Changed "SMTP protocol violation: synchronization error" into "SMTP
1246 protocol synchronization error", to keep the pedants happy.
1248 PH/08 Arrange for USE_INET_NTOA_FIX to be set in config.h for AIX systems as
1249 well as for IRIX systems, when gcc is being used. See the host.c source
1252 PH/09 Installed latest Cygwin configuration files from the Cygwin maintainer.
1254 PH/10 Named domain lists were not working if used in a queue_smtp_domains
1257 PH/11 Added support for the IGNOREQUOTA extension to LMTP, both to the lmtp
1258 transport and to the smtp transport in LMTP mode.
1260 TK/02 Remove one case of BASE64 error detection FTTB (undocumented anyway).
1262 PH/12 There was a missing call to search_tidyup() before the fork() in rda.c to
1263 run a filter in a subprocess. This could lead to confusion in subsequent
1264 lookups in the parent process. There should also be a search_tidyup() at
1265 the end of the subprocess.
1267 PH/13 Previously, if "verify = helo" was set in an ACL, the condition was true
1268 only if the host matched helo_try_verify_hosts, which caused the
1269 verification to occur when the EHLO/HELO command was issued. The ACL just
1270 tested the remembered result. Now, if a previous verification attempt has
1271 not happened, "verify = helo" does it there and then.
1273 JJ/01 exipick: added $message_exim_id variable (see 4.53-PH/04)
1275 TK/03 Fix log output including CR from clamd.
1277 PH/14 A reference to $reply_address when Reply-to: was empty and From: did not
1278 exist provoked a memory error which could cause a segfault.
1280 PH/15 Installed PCRE 6.2
1282 PH/17 Defined BIND_8_COMPAT in the Darwin os.h file.
1284 PH/18 Reversed 4.52/PH/17 because the HP-UX user found it wasn't the cause
1285 of the problem. Specifically, suggested +O2 rather than +O1 for the
1288 PH/19 Added sqlite_lock_timeout option (David Woodhouse's patch).
1290 PH/20 If a delivery was routed to a non-standard port by means of an SRV
1291 record, the port was not correctly logged when the outgoing_port log
1292 selector was set (it logged the transort's default port).
1294 PH/21 Added support for host-specific ports to manualroute, queryprogram,
1295 fallback_hosts, and "hosts" in the smtp transport.
1297 PH/22 If the log selector "outgoing_port" is set, the port is now also given on
1298 host errors such as "Connection refused".
1300 PH/23 Applied a patch to fix problems with exim-4.52 while doing radius
1301 authentication with radiusclient 0.4.9:
1303 - Error returned from rc_read_config was caught wrongly
1304 - Username/password not passed on to radius server due to wrong length.
1306 The presumption is that some radiusclient API changes for 4.51/PH/17
1307 were not taken care of correctly. The code is still untested by me (my
1308 Linux distribution still has 0.3.2 of radiusclient), but it was
1309 contributed by a Radius user.
1311 PH/24 When doing a callout, the value of $domain wasn't set correctly when
1312 expanding the "port" option of the smtp transport.
1314 TK/04 MIME ACL: Fix buffer underrun that occurs when EOF condition is met
1315 while reading a MIME header. Thanks to Tom Hughes for a patch.
1317 PH/24 Include config.h inside local_scan.h so that configuration settings are
1320 PH/25 Make $smtp_command_argument available after all SMTP commands. This means
1321 that in an ACL for RCPT (for example), you can examine exactly what was
1324 PH/26 Exim was recognizing IPv6 addresses of the form [IPv6:....] in EHLO
1325 commands, but it was not correctly comparing the address with the actual
1326 client host address. Thus, it would show the EHLO address in Received:
1327 header lines when this was not necessary.
1329 PH/27 Added the % operator to ${eval:}.
1331 PH/28 Exim tries to create and chdir to its spool directory when it starts;
1332 it should be ignoring failures (because with -C, for example, it has lost
1333 privilege). It wasn't ignoring creation failures other than "already
1336 PH/29 Added "crypteq" to the list of supported features that Exim outputs when
1339 PH/30 Fixed (presumably very longstanding) bug in exim_dbmbuild: if it failed
1340 because an input line was too long, either on its own, or by virtue of
1341 too many continuations, the temporary file was not being removed, and the
1342 return code was incorrect.
1344 PH/31 Missing "BOOL" in function definition in filtertest.c.
1346 PH/32 Applied Sieve patches from the maintainer.
1348 TK/05 Domainkeys: Accomodate for a minor API change in libdomainkeys 0.67.
1350 PH/33 Added "verify = not_blind".
1352 PH/34 There are settings for CHOWN_COMMAND and MV_COMMAND that can be used in
1353 Local/Makefile (with some defaults set). These are used in built scripts
1354 such as exicyclog, but they have never been used in the exim_install
1355 script (though there are many overriding facilities there). I have
1356 arranged that the exim_install script now takes note of these two
1359 PH/35 Installed configuration files for Dragonfly.
1361 PH/36 When a locally submitted message by a trusted user did not contain a
1362 From: header, and the sender address was obtained from -f or from an SMTP
1363 MAIL command, and the trusted user did not use -F to supply a sender
1364 name, $originator_name was incorrectly used when constructing a From:
1365 header. Furthermore, $originator_name was used for submission mode
1366 messages from external hosts without From: headers in a similar way,
1367 which is clearly wrong.
1369 PH/37 Added control=suppress_local_fixups.
1371 PH/38 When log_selector = +received_sender was set, and the addition of the
1372 sender made the log line's construction buffer exactly full, or one byte
1373 less than full, an overflow happened when the terminating "\n" was
1376 PH/39 Added a new log selector, "unknown_in_list", which provokes a log entry
1377 when the result of a list match is failure because a DNS lookup failed.
1379 PH/40 RM_COMMAND is now used in the building process.
1381 PH/41 Added a "distclean" target to the top-level Makefile; it deletes all
1382 the "build-* directories that it finds.
1384 PH/42 (But a TF fix): In a domain list, Exim incorrectly matched @[] if the IP
1385 address in a domain literal was a prefix of an interface address.
1387 PH/43 (Again a TF fix): In the dnslookup router, do not apply widen_domains
1388 when verifying a sender address, unless rewrite_headers is false.
1390 PH/44 Wrote a long comment about why errors_to addresses are verified as
1391 recipients, not senders.
1393 TF/01 Add missing LIBS=-lm to OS/Makefile-OpenBSD which was overlooked when
1394 the ratelimit ACL was added.
1396 PH/45 Added $smtp_command for the full command (cf $smtp_command_argument).
1398 PH/46 Added extra information about PostgreSQL errors to the error string.
1400 PH/47 Added an interface to a fake DNS resolver for use by the new test suite,
1401 avoiding the need to install special zones in a real server. This is
1402 backwards compatible; if it can't find the fake resolver, it drops back.
1403 Thus, both old and new test suites can be run.
1405 TF/02 Added util/ratelimit.pl
1407 TF/03 Minor fix to the ratelimit code to improve its behaviour in case the
1408 clock is set back in time.
1410 TF/04 Fix the ratelimit support in exim_fixdb. Patch provided by Brian
1411 Candler <B.Candler@pobox.com>.
1413 TF/05 The fix for PH/43 was not completely correct; widen_domains is always
1414 OK for addresses that are the result of redirections.
1416 PH/48 A number of further additions for the benefit of the new test suite,
1417 including a fake gethostbyname() that interfaces to the fake DNS resolver
1420 TF/06 The fix for widen_domains has also been applied to qualify_single and
1421 search_parents which are the other dnslookup options that can cause
1424 PH/49 Michael Haardt's randomized retrying, but as a separate retry parameter
1427 PH/50 Make never_users, trusted_users, admin_groups, trusted_groups expandable.
1429 TF/07 Exim produced the error message "an SRV record indicated no SMTP
1430 service" if it encountered an MX record with an empty target hostname.
1431 The message is now "an MX or SRV record indicated no SMTP service".
1433 TF/08 Change PH/13 introduced the possibility that verify=helo may defer,
1434 if the DNS of the sending site is misconfigured. This is quite a
1435 common situation. This change restores the behaviour of treating a
1436 helo verification defer as a failure.
1438 PH/51 If self=fail was set on a router, the bounce message did not include the
1439 actual error message.
1445 TF/01 Added support for Client SMTP Authorization. See NewStuff for details.
1447 PH/01 When a transport filter timed out in a pipe delivery, and the pipe
1448 command itself ended in error, the underlying message about the transport
1449 filter timeout was being overwritten with the pipe command error. Now the
1450 underlying error message should be appended to the second error message.
1452 TK/01 Fix poll() being unavailable on Mac OSX 10.2.
1454 PH/02 Reduce the amount of output that "make" produces by default. Full output
1455 can still be requested.
1457 PH/03 The warning log line about a condition test deferring for a "warn" verb
1458 was being output only once per connection, rather than after each
1459 occurrence (because it was using the same function as for successful
1460 "warn" verbs). This seems wrong, so I have changed it.
1462 TF/02 Two buglets in acl.c which caused Exim to read a few bytes of memory that
1463 it should not have, which might have caused a crash in the right
1464 circumstances, but probably never did.
1466 PH/04 Installed a modified version of Tony Finch's patch to make submission
1467 mode fix the return path as well as the Sender: header line, and to
1468 add a /name= option so that you can make the user's friendly name appear
1471 TF/03 Added the control = fakedefer ACL modifier.
1473 TF/04 Added the ratelimit ACL condition. See NewStuff for details. Thanks to
1474 Mark Lowes for thorough testing.
1476 TK/02 Rewrote SPF support to work with libspf2 versions >1.2.0.
1478 TK/03 Merged latest SRS patch from Miles Wilton.
1480 PH/05 There's a shambles in IRIX6 - it defines EX_OK in unistd.h which conflicts
1481 with the definition in sysexits.h (which is #included earlier).
1482 Fortunately, Exim does not actually use EX_OK. The code used to try to
1483 preserve the sysexits.h value, by assumimg that macro definitions were
1484 scanned for macro replacements. I have been disabused of this notion,
1485 so now the code just undefines EX_OK before #including unistd.h.
1487 PH/06 There is a timeout for writing blocks of data, set by, e.g. data_timeout
1488 in the smtp transport. When a block could not be written in a single
1489 write() function, the timeout was being re-applied to each part-write.
1490 This seems wrong - if the receiver was accepting one byte at a time it
1491 would take for ever. The timeout is now adjusted when this happens. It
1492 doesn't have to be particularly precise.
1494 TK/04 Added simple SPF lookup method in EXPERIMENTAL_SPF. See NewStuff for
1495 details. Thanks to Chris Webb <chris@arachsys.com> for the patch!
1497 PH/07 Added "fullpostmaster" verify option, which does a check to <postmaster>
1498 without a domain if the check to <postmaster@domain> fails.
1500 SC/01 Eximstats: added -xls and the ability to specify output files
1501 (patch written by Frank Heydlauf).
1503 SC/02 Eximstats: use FileHandles for outputing results.
1505 SC/03 Eximstats: allow any combination of xls, txt, and html output.
1507 SC/04 Eximstats: fixed display of large numbers with -nvr option
1509 SC/05 Eximstats: fixed merging of reports with empty tables.
1511 SC/06 Eximstats: added the -include_original_destination flag
1513 SC/07 Eximstats: removed tabs and trailing whitespace.
1515 TK/05 Malware: Improve on aveserver error handling. Patch from Alex Miller.
1517 TK/06 MBOX spool code: Add real "From " MBOX separator line
1518 so the .eml file is really in mbox format (even though
1519 most programs do not really care). Patch from Alex Miller.
1521 TK/07 MBOX spool code: Add X-Envelope-From: and X-Envelope-To: headers.
1522 The latter is generated from $received_to and is only set if the
1523 message has one envelope recipient. SA can use these headers,
1524 obviously out-of-the-box. Patch from Alex Miller.
1526 PH/08 The ${def test on a variable was returning false if the variable's
1527 value was "0", contrary to what the specification has always said!
1528 The result should be true unless the variable is empty.
1530 PH/09 The syntax error of a character other than { following "${if
1531 def:variable_name" (after optional whitespace) was not being diagnosed.
1532 An expansion such as ${if def:sender_ident:{xxx}{yyy}} in which an
1533 accidental colon was present, for example, could give incorrect results.
1535 PH/10 Tidied the code in a number of places where the st_size field of a stat()
1536 result is used (not including appendfile, where other changes are about
1539 PH/11 Upgraded appendfile so that quotas larger than 2G are now supported.
1540 This involved changing a lot of size variables from int to off_t. It
1541 should work with maildirs and everything.
1543 TK/08 Apply fix provided by Michael Haardt to prevent deadlock in case of
1544 spamd dying while we are connected to it.
1546 TF/05 Fixed a ${extract error message typo reported by Jeremy Harris
1549 PH/12 Applied Alex Kiernan's patch for the API change for the error callback
1550 function for BDB 4.3.
1552 PH/13 Changed auto_thaw such that it does not apply to bounce messages.
1554 PH/14 Imported PCRE 6.0; this was more than just a trivial operation because
1555 the sources for PCRE have been re-arranged and more files are now
1558 PH/15 The code I had for printing potentially long long variables in PH/11
1559 above was not the best (it lost precision). The length of off_t variables
1560 is now inspected at build time, and an appropriate printing format (%ld
1561 or %lld) is chosen and #defined by OFF_T_FMT. We also define LONGLONG_T
1562 to be "long long int" or "long int". This is needed for the internal
1563 formatting function string_vformat().
1565 PH/16 Applied Matthew Newton's patch to exicyclog: "If log_file_path is set in
1566 the configuration file to be ":syslog", then the script "guesses" where
1567 the logs files are, rather than using the compiled in default. In our
1568 case the guess is not the same as the compiled default, so the script
1569 suddenly stopped working when I started to use syslog. The patch checks
1570 to see if log_file_path is "". If so, it attempts to read it from exim
1571 with no configuration file to get the compiled in version, before it
1572 falls back to the previous guessing code."
1574 TK/09 Added "prvs" and "prvscheck" expansion items. These help a lot with
1575 implementing BATV in an Exim configuration. See NewStuff for the gory
1578 PH/17 Applied Michael Haardt's patch for HP-UX, affecting only the os.h and
1579 Makefile that are specific to HP-UX.
1581 PH/18 If the "use_postmaster" option was set for a recipient callout together
1582 with the "random" option, the postmaster address was used as the MAIL
1583 FROM address for the random test, but not for the subsequent recipient
1584 test. It is now used for both.
1586 PH/19 Applied Michael Haardt's patch to update Sieve to RFC3028bis. "The
1587 patch removes a few documentation additions to RFC 3028, because the
1588 latest draft now contains them. It adds the new en;ascii-case comparator
1589 and a new error check for 8bit text in MIME parts. Comparator and
1590 require names are now matched exactly. I enabled the subaddress
1591 extension, but it is not well tested yet (read: it works for me)."
1593 PH/20 Added macros for time_t as for off_t (see PH/15 above) and used them to
1594 rework some of the code of TK/09 above to avoid the hardwired use of
1595 "%lld" and "long long". Replaced the call to snprintf() with a call to
1598 PH/21 Added some other messages to those in 4.51/PH/42, namely "All relevant MX
1599 records point to non-existent hosts", "retry timeout exceeded", and
1600 "retry time not reached for any host after a long failure period".
1602 PH/22 Fixed some oversights/typos causing bugs when Exim is compiled with
1603 experimental DomainKeys support:
1605 (1) The filter variables $n0-$n9 and $sn0-$sn9 were broken.
1606 (2) On an error such as an illegally used "control", the wrong name for
1607 the control was given.
1609 These problems did NOT occur unless DomainKeys support was compiled.
1611 PH/23 Added daemon_startup_retries and daemon_startup_sleep.
1613 PH/24 Added ${if match_ip condition.
1615 PH/25 Put debug statements on either side of calls to EXIM_DBOPEN() for hints
1616 databases so that it will be absolutely obvious if a crash occurs in the
1617 DB library. This is a regular occurrence (often caused by mis-matched
1620 PH/26 Insert a lot of missing (void) casts for functions such as chown(),
1621 chmod(), fcntl(), sscanf(), and other functions from stdio.h. These were
1622 picked up on a user's system that detects such things. There doesn't seem
1623 to be a gcc warning option for this - only an attribute that has to be
1624 put on the function's prototype. It seems that in Fedora Core 4 they have
1625 set this on a number of new functions. No doubt there will be more in due
1628 PH/27 If a dnslookup or manualroute router is set with verify=only, it need not
1629 specify a transport. However, if an address that was verified by such a
1630 router was the subject of a callout, Exim crashed because it tried to
1631 read the rcpt_include_affixes from the non-existent transport. Now it
1632 just assumes that the setting of that option is false. This bug was
1633 introduced by 4.51/PH/31.
1635 PH/28 Changed -d+all to exclude +memory, because that information is very
1636 rarely of interest, but it makes the output a lot bigger. People tend to
1637 do -d+all out of habit.
1639 PH/29 Removed support for the Linux-libc5 build, as it is obsolete and the
1640 code in os-type was giving problems when libc.so lives in lib64, like on
1643 PH/30 Exim's DNS code uses the original T_xxx names for DNS record times. These
1644 aren't the modern standard, and it seems that some systems' include files
1645 don't always have them. Exim was already checking for some of the newer
1646 ones like T_AAAA, and defining it itself. I've added checks for all the
1647 record types that Exim uses.
1649 PH/31 When using GnuTLS, if the parameters cache file did not exist, Exim was
1650 not automatically generating a new one, as it is supposed to. This
1651 prevented TLS from working. If the file did exist, but contained invalid
1652 data, a new version was generated, as expected. It was only the case of a
1653 non-existent file that was broken.
1655 TK/10 Domainkeys: Fix a bug in verification that caused a crash in conjunction
1656 with a change in libdomainkeys > 0.64.
1658 TK/11 Domainkeys: Change the logic how the "testing" policy flag is retrieved
1659 from DNS. If the selector record carries the flag, it now has
1660 precedence over the domain-wide flag.
1662 TK/12 Cleared some compiler warnings related to SPF, SRS and DK code.
1664 PH/32 In mua_wrapper mode, if an smtp transport configuration error (such as
1665 the use of a port name that isn't defined in /etc/services) occurred, the
1666 message was deferred as in a normal delivery, and thus remained on the
1667 spool, instead of being failed because of the mua_wrapper setting. This
1668 is now fixed, and I tidied up some of the mua_wrapper messages at the
1671 SC/08 Eximstats: whilst parsing the mainlog(s), store information about
1672 the messages in a hash of arrays rather than using individual hashes.
1673 This is a bit cleaner and results in dramatic memory savings, albeit
1674 at a slight CPU cost.
1676 SC/09 Eximstats: added the -show_rt<list> and the -show_dt<list> flags
1677 as requested by Marc Sherman.
1679 SC/10 Eximstats: added histograms for user specified patterns as requested
1682 SC/11 Eximstats: v1.43 - bugfix for pattern histograms with -h0 specified.
1684 PH/33 Patch from the Cygwin maintainer to add "b" to all occurences of
1685 fopen() in the content-scanning modules that did not already have it.
1691 TK/01 Added Yahoo DomainKeys support via libdomainkeys. See
1692 doc/experimental-spec.txt for details. (http://domainkeys.sf.net)
1694 TK/02 Fix ACL "control" statement not being available in MIME ACL.
1696 TK/03 Fix ACL "regex" condition not being available in MIME ACL.
1698 PH/01 Installed a patch from the Sieve maintainer that allows -bf to be used
1699 to test Sieve filters that use "vacation".
1701 PH/02 Installed a slightly modified version of Nikos Mavrogiannopoulos' patch
1702 that changes the way the GnuTLS parameters are stored in the cache file.
1703 The new format can be generated externally. For backward compatibility,
1704 if the data in the cache doesn't make sense, Exim assumes it has read an
1705 old-format file, and it generates new data and writes a new file. This
1706 means that you can't go back to an older release without removing the
1709 PH/03 A redirect router that has both "unseen" and "one_time" set does not
1710 work if there are any delivery delays because "one_time" forces the
1711 parent to be marked "delivered", so its unseen clone is never tried
1712 again. For this reason, Exim now forbids the simultaneous setting of
1715 PH/04 Change 4.11/85 fixed an obscure bug concerned with addresses that are
1716 redirected to themselves ("homonym" addresses). Read the long ChangeLog
1717 entry if you want to know the details. The fix, however, neglected to
1718 consider the case when local delivery batching is involved. The test for
1719 "previously delivered" was not happening when checking to see if an
1720 address could be batched with a previous (undelivered) one; under
1721 certain circumstances this could lead to multiple deliveries to the same
1724 PH/05 Renamed the macro SOCKLEN_T as EXIM_SOCKLEN_T because AIX uses SOCKLEN_T
1725 in its include files, and this causes problems building Exim.
1727 PH/06 A number of "verify =" ACL conditions have no options (e.g. verify =
1728 header_syntax) but Exim was just ignoring anything given after a slash.
1729 In particular, this caused confusion with an attempt to use "verify =
1730 reverse_host_lookup/defer_ok". An error is now given when options are
1731 supplied for verify items that do not have them. (Maybe reverse_host_
1732 lookup should have a defer_ok option, but that's a different point.)
1734 PH/07 Increase the size of the buffer for incoming SMTP commands from 512 (as
1735 defined by RFC 821) to 2048, because there were problems with some AUTH
1736 commands, and RFC 1869 says the size should be increased for extended
1737 SMTP commands that take arguments.
1739 PH/08 Added ${dlfunc dynamically loaded function for expansion (code from Tony
1742 PH/09 Previously, an attempt to use ${perl when it wasn't compiled gave an
1743 "unknown" error; now it says that the functionality isn't in the binary.
1745 PH/10 Added a nasty fudge to try to recognize and flatten LDAP passwords in
1746 an address' error message when a string expansion fails (syntax or
1747 whatever). Otherwise the password may appear in the log. Following change
1748 PH/42 below, there is no longer a chance of it appearing in a bounce
1751 PH/11 Installed exipick version 20050225.0 from John Jetmore.
1753 PH/12 If the last host in a fallback_hosts list was multihomed, only the first
1754 of its addresses was ever tried. (Bugzilla bug #2.)
1756 PH/13 If "headers_add" in a transport didn't end in a newline, Exim printed
1757 the result incorrectly in the debug output. (It correctly added a newline
1758 to what was transported.)
1760 TF/01 Added $received_time.
1762 PH/14 Modified the default configuration to add an acl_smtp_data ACL, with
1763 commented out examples of how to interface to a virus scanner and to
1764 SpamAssassin. Also added commented examples of av_scanner and
1765 spamd_address settings.
1767 PH/15 Further to TK/02 and TK/03 above, tidied up the tables of what conditions
1768 and controls are allowed in which ACLs. There were a couple of minor
1769 errors. Some of the entries in the conditions table (which is a table of
1770 where they are NOT allowed) were getting very unwieldy; rewrote them as a
1771 negation of where the condition IS allowed.
1773 PH/16 Installed updated OS/os.c-cygwin from the Cygwin maintainer.
1775 PH/17 The API for radiusclient changed at release 0.4.0. Unfortunately, the
1776 header file does not have a version number, so I've had to invent a new
1777 value for RADIUS_LIB_TYPE, namely "RADIUSCLIENTNEW" to request the new
1778 API. The code is untested by me (my Linux distribution still has 0.3.2 of
1779 radiusclient), but it was contributed by a Radius user.
1781 PH/18 Installed Lars Mainka's patch for the support of CRL collections in
1782 files or directories, for OpenSSL.
1784 PH/19 When an Exim process that is running as root has to create an Exim log
1785 file, it does so in a subprocess that runs as exim:exim so as to get the
1786 ownership right at creation (otherwise, other Exim processes might see
1787 the file with the wrong ownership). There was no test for failure of this
1788 fork() call, which would lead to the process getting stuck as it waited
1789 for a non-existent subprocess. Forks do occasionally fail when resources
1790 run out. I reviewed all the other calls to fork(); they all seem to check
1793 PH/20 When checking for unexpected SMTP input at connect time (before writing
1794 the banner), Exim was not dealing correctly with a non-positive return
1795 from the read() function. If the client had disconnected by this time,
1796 the result was a log entry for a synchronization error with an empty
1797 string after "input=" when read() returned zero. If read() returned -1
1798 (an event I could not check), uninitialized data bytes were printed.
1799 There were reports of junk text (parts of files, etc) appearing after
1802 PH/21 Added acl_not_smtp_mime to allow for MIME scanning for non-SMTP messages.
1804 PH/22 Added support for macro redefinition, and (re)definition in between
1805 driver and ACL definitions.
1807 PH/23 The cyrus_sasl authenticator was expanding server_hostname, but then
1808 forgetting to use the resulting value; it was using the unexpanded value.
1810 PH/24 The cyrus_sasl authenticator was advertising mechanisms for which it
1811 hadn't been configured. The fix is from Juergen Kreileder, who
1812 understands it better than I do:
1814 "Here's what I see happening with three configured cyrus_sasl
1815 authenticators configured (plain, login, cram-md5):
1817 On startup auth_cyrus_sasl_init() gets called for each of these.
1818 This means three calls to sasl_listmech() without a specified mech_list.
1819 => SASL tests which mechs of all available mechs actually work
1820 => three warnings about OTP not working
1821 => the returned list contains: plain, login, cram-md5, digest-md5, ...
1823 With the patch, sasl_listmech() also gets called three times. But now
1824 SASL's mech_list option is set to the server_mech specified in the the
1825 authenticator. Or in other words, the answer from sasl_listmech()
1826 gets limited to just the mech you're testing for (which is different
1828 => the return list contains just 'plain' or 'login', 'cram-md5' or
1829 nothing depending on the value of ob->server_mech.
1831 I've just tested the patch: Authentication still works fine,
1832 unavailable mechs specified in the exim configuration are still
1833 caught, and the auth.log warnings about OTP are gone."
1835 PH/25 When debugging is enabled, the contents of the command line are added
1836 to the debugging output, even when log_selector=+arguments is not
1839 PH/26 Change scripts/os-type so that when "uname -s" returns just "GNU", the
1840 answer is "GNU", and only if the return is "GNU/something" is the answer
1843 PH/27 $acl_verify_message is now set immediately after the failure of a
1844 verification in an ACL, and so is available in subsequent modifiers. In
1845 particular, the message can be preserved by coding like this:
1847 warn !verify = sender
1848 set acl_m0 = $acl_verify_message
1850 Previously, $acl_verify_message was set only while expanding "message"
1851 and "log_message" when a very denied access.
1853 PH/28 Modified OS/os.c-Linux with
1855 -#ifndef OS_LOAD_AVERAGE
1856 +#if !defined(OS_LOAD_AVERAGE) && defined(__linux__)
1858 to make Exim compile on kfreebsd-gnu. (I'm totally confused about the
1859 nomenclature these days.)
1861 PH/29 Installed patch from the Sieve maintainer that adds the options
1862 sieve_useraddress and sieve_subaddress to the redirect router.
1864 PH/30 In these circumstances:
1865 . Two addresses routed to the same list of hosts;
1866 . First host does not offer TLS;
1867 . First host accepts first address;
1868 . First host gives temporary error to second address;
1869 . Second host offers TLS and a TLS session is established;
1870 . Second host accepts second address.
1871 Exim incorrectly logged both deliveries with the TLS parameters (cipher
1872 and peerdn, if requested) that were in fact used only for the second
1875 PH/31 When doing a callout as part of verifying an address, Exim was not paying
1876 attention to any local part prefix or suffix that was matched by the
1877 router that accepted the address. It now behaves in the same way as it
1878 does for delivery: the affixes are removed from the local part unless
1879 rcpt_include_affixes is set on the transport.
1881 PH/32 Add the sender address, as F=<...>, to the log line when logging a
1882 timeout during the DATA phase of an incoming message.
1884 PH/33 Sieve envelope tests were broken for match types other than :is. I have
1885 applied a patch sanctioned by the Sieve maintainer.
1887 PH/34 Change 4.50/80 broke Exim in that it could no longer handle cases where
1888 the uid or gid is negative. A case of a negative gid caused this to be
1889 noticed. The fix allows for either to be negative.
1891 PH/35 ACL_WHERE_MIME is now declared unconditionally, to avoid too much code
1892 clutter, but the tables that are indexed by ACL_WHERE_xxx values had been
1895 PH/36 The change PH/12 above was broken. Fixed it.
1897 PH/37 Exim used to check for duplicate addresses in the middle of routing, on
1898 the grounds that routing the same address twice would always produce the
1899 same answer. This might have been true once, but it is certainly no
1900 longer true now. Routing a child address may depend on the previous
1901 routing that produced that child. Some complicated redirection strategies
1902 went wrong when messages had multiple recipients, and made Exim's
1903 behaviour dependent on the order in which the addresses were given.
1905 I have moved the duplicate checking until after the routing is complete.
1906 Exim scans the addresses that are assigned to local and remote
1907 transports, and removes any duplicates. This means that more work will be
1908 done, as duplicates will always all be routed, but duplicates are
1909 presumably rare, so I don't expect this is of any significance.
1911 For deliveries to pipes, files, and autoreplies, the duplicate checking
1912 still happens during the routing process, since they are not going to be
1915 PH/38 Installed a patch from Ian Freislich, with the agreement of Tom Kistner.
1916 It corrects a timeout issue with spamd. This is Ian's comment: "The
1917 background is that sometimes spamd either never reads data from a
1918 connection it has accepted, or it never writes response data. The exiscan
1919 spam.[ch] uses a 3600 second timeout on spamd socket reads, further, it
1920 blindly assumes that writes won't block so it may never time out."
1922 PH/39 Allow G after quota size as well as K and M.
1924 PH/40 The value set for $authenticated_id in an authenticator may not contain
1925 binary zeroes or newlines because the value is written to log lines and
1926 to spool files. There was no check on this. Now the value is run through
1927 the string_printing() function so that such characters are converted to
1928 printable escape sequences.
1930 PH/41 $message_linecount is a new variable that contains the total number of
1931 lines in the message. Compare $body_linecount, which is the count for the
1934 PH/42 Exim no longer gives details of delivery errors for specific addresses in
1935 bounce and delay warning messages, except in certain special cases, which
1938 (a) An SMTP error message from a remote host;
1939 (b) A message specified in a :fail: redirection;
1940 (c) A message specified in a "fail" command in a system filter;
1941 (d) A message specified in a FAIL return from the queryprogram router;
1942 (e) A message specified by the cannot_route_message router option.
1944 In these cases only, Exim does include the error details in bounce and
1945 warning messages. There are also a few cases where bland messages such
1946 as "unrouteable address" or "local delivery error" are given.
1948 PH/43 $value is now also set for the "else" part of a ${run expansion.
1950 PH/44 Applied patch from the Sieve maintainer: "The vacation draft is still
1951 being worked on, but at least Exim now implements the latest version to
1954 PH/45 In a pipe transport, although a timeout while waiting for the pipe
1955 process to complete was treated as a delivery failure, a timeout while
1956 writing the message to the pipe was logged, but erroneously treated as a
1957 successful delivery. Such timeouts include transport filter timeouts. For
1958 consistency with the overall process timeout, these timeouts are now
1959 treated as errors, giving rise to delivery failures by default. However,
1960 there is now a new Boolean option for the pipe transport called
1961 timeout_defer, which, if set TRUE, converts the failures into defers for
1962 both kinds of timeout. A transport filter timeout is now identified in
1965 PH/46 The "scripts/Configure-config.h" script calls "make" at one point. On
1966 systems where "make" and "gmake" are different, calling "gmake" at top
1967 level broke things. I've arranged for the value of $(MAKE) to be passed
1968 from the Makefile to this script so that it can call the same version of
1972 A note about Exim versions 4.44 and 4.50
1973 ----------------------------------------
1975 Exim 4.50 was meant to be the next release after 4.43. It contains a lot of
1976 changes of various kinds. As a consequence, a big documentation update was
1977 needed. This delayed the release for rather longer than seemed good, especially
1978 in the light of a couple of (minor) security issues. Therefore, the changes
1979 that fixed bugs were backported into 4.43, to create a 4.44 maintenance
1980 release. So 4.44 and 4.50 are in effect two different branches that both start
1983 I have left the 4.50 change log unchanged; it contains all the changes since
1984 4.43. The change log for 4.44 is below; many of its items are identical to
1985 those for 4.50. This seems to be the most sensible way to preserve the
1986 historical information.
1992 1. Minor wording change to the doc/README.SIEVE file.
1994 2. Change 4.43/35 introduced a bug: if quota_filecount was set, the
1995 computation of the current number of files was incorrect.
1997 3. Closing a stable door: arrange to panic-die if setitimer() ever fails. The
1998 bug fixed in 4.43/37 would have been diagnosed quickly if this had been in
2001 4. Give more explanation in the error message when the command for a transport
2002 filter fails to execute.
2004 5. There are several places where Exim runs a non-Exim command in a
2005 subprocess. The SIGUSR1 signal should be disabled for these processes. This
2006 was being done only for the command run by the queryprogram router. It is
2007 now done for all such subprocesses. The other cases are: ${run, transport
2008 filters, and the commands run by the lmtp and pipe transports.
2010 6. Added CONFIGURE_GROUP build-time option.
2012 7. Some older OS have a limit of 256 on the maximum number of file
2013 descriptors. Exim was using setrlimit() to set 1000 as a large value
2014 unlikely to be exceeded. Change 4.43/17 caused a lot of logging on these
2015 systems. I've change it so that if it can't get 1000, it tries for 256.
2017 8. "control=submission" was allowed, but had no effect, in a DATA ACL. This
2018 was an oversight, and furthermore, ever since the addition of extra
2019 controls (e.g. 4.43/32), the checks on when to allow different forms of
2020 "control" were broken. There should now be diagnostics for all cases when a
2021 control that does not make sense is encountered.
2023 9. Added the /retain_sender option to "control=submission".
2025 10. $recipients is now available in the predata ACL (oversight).
2027 11. Tidy the search cache before the fork to do a delivery from a message
2028 received from the command line. Otherwise the child will trigger a lookup
2029 failure and thereby defer the delivery if it tries to use (for example) a
2030 cached ldap connection that the parent has called unbind on.
2032 12. If verify=recipient was followed by verify=sender in a RCPT ACL, the value
2033 of $address_data from the recipient verification was clobbered by the
2034 sender verification.
2036 13. The value of address_data from a sender verification is now available in
2037 $sender_address_data in subsequent conditions in the ACL statement.
2039 14. Added forbid_sieve_filter and forbid_exim_filter to the redirect router.
2041 15. Added a new option "connect=<time>" to callout options, to set a different
2044 16. If FIXED_NEVER_USERS was defined, but empty, Exim was assuming the uid 0
2045 was its contents. (It was OK if the option was not defined at all.)
2047 17. A "Completed" log line is now written for messages that are removed from
2048 the spool by the -Mrm option.
2050 18. New variables $sender_verify_failure and $recipient_verify_failure contain
2051 information about exactly what failed.
2053 19. Added -dd to debug only the daemon process.
2055 20. Incorporated Michael Haardt's patch to ldap.c for improving the way it
2056 handles timeouts, both on the server side and network timeouts. Renamed the
2057 CONNECT parameter as NETTIMEOUT (but kept the old name for compatibility).
2059 21. The rare case of EHLO->STARTTLS->HELO was setting the protocol to "smtp".
2060 It is now set to "smtps".
2062 22. $host_address is now set to the target address during the checking of
2063 ignore_target_hosts.
2065 23. When checking ignore_target_hosts for an ipliteral router, no host name was
2066 being passed; this would have caused $sender_host_name to have been used if
2067 matching the list had actually called for a host name (not very likely,
2068 since this list is usually IP addresses). A host name is now passed as
2071 24. Changed the calls that set up the SIGCHLD handler in the daemon to use the
2072 code that specifies a non-restarting handler (typically sigaction() in
2073 modern systems) in an attempt to fix a rare and obscure crash bug.
2075 25. Narrowed the window for a race in the daemon that could cause it to ignore
2076 SIGCHLD signals. This is not a major problem, because they are used only to
2077 wake it up if nothing else does.
2079 26. A malformed maildirsize file could cause Exim to calculate negative values
2080 for the mailbox size or file count. Odd effects could occur as a result.
2081 The maildirsize information is now recalculated if the size or filecount
2084 27. Added HAVE_SYS_STATVFS_H to the os.h file for Linux, as it has had this
2085 support for a long time. Removed HAVE_SYS_VFS_H.
2087 28. Installed the latest version of exipick from John Jetmore.
2089 29. In an address list, if the pattern was not a regular expression, an empty
2090 subject address (from a bounce message) matched only if the pattern was an
2091 empty string. Non-empty patterns were not even tested. This was the wrong
2092 because it is perfectly reasonable to use an empty address as part of a
2093 database query. An empty address is now tested by patterns that are
2094 lookups. However, all the other forms of pattern expect the subject to
2095 contain a local part and a domain, and therefore, for them, an empty
2096 address still always fails if the pattern is not itself empty.
2098 30. Exim went into a mad DNS loop when attempting to do a callout where the
2099 host was specified on an smtp transport, and looking it up yielded more
2100 than one IP address.
2102 31. Re-factored the code for checking spool and log partition space into a
2103 function that finds that data and another that does the check. The former
2104 is then used to implement four new variables: $spool_space, $log_space,
2105 $spool_inodes, and $log_inodes.
2107 32. The RFC2047 encoding function was originally intended for short strings
2108 such as real names; it was not keeping to the 75-character limit for
2109 encoded words that the RFC imposes. It now respects the limit, and
2110 generates multiple encoded words if necessary. To be on the safe side, I
2111 have increased the buffer size for the ${rfc2047: expansion operator from
2114 33. It is now permitted to omit both strings after an "if" condition; if the
2115 condition is true, the result is "true". As before, when the second string
2116 is omitted, a false condition yields an empty string. This makes it less
2117 cumbersome to write custom ACL and router conditions.
2119 34. Failure to deliver a bounce message always caused it to be frozen, even if
2120 there was an errors_to setting on the router. The errors_to setting is now
2123 35. If an IPv6 address is given for -bh or -bhc, it is now converted to the
2124 canonical form (fully expanded) before being placed in
2125 $sender_host_address.
2127 36. The table in the code that translates DNS record types into text (T_A to
2128 "A" for instance) was missing entries for NS and CNAME. It is just possible
2129 that this could have caused confusion if both these types were looked up
2130 for the same domain, because the text type is used as part of Exim's
2131 per-process caching. But the chance of anyone hitting this buglet seems
2134 37. The dnsdb lookup has been extended in a number of ways.
2136 (1) There is a new type, "zns", which walks up the domain tree until it
2137 finds some nameserver records. It should be used with care.
2139 (2) There is a new type, "mxh", which is like "mx" except that it returns
2140 just the host names, not the priorities.
2142 (3) It is now possible to give a list of domains (or IP addresses) to be
2143 looked up. The behaviour when one of the lookups defers can be
2144 controlled by a keyword.
2146 (4) It is now possible to specify the separator character for use when
2147 multiple records are returned.
2149 38. The dnslists ACL condition has been extended: it is now possible to supply
2150 a list of IP addresses and/or domains to be looked up in a particular DNS
2153 39. Added log_selector=+queue_time_overall.
2155 40. When running the queue in the test harness, wait just a tad after forking a
2156 delivery process, to get repeatability of debugging output.
2158 41. Include certificate and key file names in error message when GnuTLS fails
2159 to set them up, because the GnuTLS error message doesn't include the name
2160 of the failing file when there is a problem reading it.
2162 42. Allow both -bf and -bF in the same test run.
2164 43. Did the same fix as 41 above for OpenSSL, which had the same infelicity.
2166 44. The "Exiscan patch" is now merged into the mainline Exim source.
2168 45. Sometimes the final signoff response after QUIT could fail to get
2169 transmitted in the non-TLS case. Testing !tls_active instead of tls_active
2170 < 0 before doing a fflush(). This bug looks as though it goes back to the
2171 introduction of TLS in release 3.20, but "sometimes" must have been rare
2172 because the tests only now provoked it.
2174 46. Reset the locale to "C" after calling embedded Perl, in case it was changed
2175 (this can affect the format of dates).
2177 47. exim_tidydb, when checking for the continued existence of a message for
2178 which it has found a message-specific retry record, was not finding
2179 messages that were in split spool directories. Consequently, it was
2180 deleting retry records that should have stayed in existence.
2182 48. Steve fixed some bugs in eximstats.
2184 49. The SPA authentication driver was not abandoning authentication and moving
2185 on to the next authenticator when an expansion was forced to fail,
2186 contradicting the general specification for all authenticators. Instead it
2187 was generating a temporary error. It now behaves as specified.
2189 50. The default ordering of permitted cipher suites for GnuTLS was pessimal
2190 (the order specifies the preference for clients). The order is now AES256,
2191 AES128, 3DES, ARCFOUR128.
2193 51. Small patch to Sieve code - explicitly set From: when generating an
2196 52. Exim crashed if a remote delivery caused a very long error message to be
2197 recorded - for instance if somebody sent an entire SpamAssassin report back
2198 as a large number of 550 error lines. This bug was coincidentally fixed by
2199 increasing the size of one of Exim's internal buffers (big_buffer) that
2200 happened as part of the Exiscan merge. However, to be on the safe side, I
2201 have made the code more robust (and fixed the comments that describe what
2204 53. Now that there can be additional text after "Completed" in log lines (if
2205 the queue_time_overall log selector is set), a one-byte patch to exigrep
2206 was needed to allow it to recognize "Completed" as not the last thing in
2209 54. The LDAP lookup was not handling a return of LDAP_RES_SEARCH_REFERENCE. A
2210 patch that reportedly fixes this has been added. I am not expert enough to
2211 create a test for it. This is what the patch creator wrote:
2213 "I found a little strange behaviour of ldap code when working with
2214 Windows 2003 AD Domain, where users was placed in more than one
2215 Organization Units. When I tried to give exim partial DN, the exit code
2216 of ldap_search was unknown to exim because of LDAP_RES_SEARCH_REFERENCE.
2217 But simultaneously result of request was absolutely normal ldap result,
2218 so I produce this patch..."
2220 Later: it seems that not all versions of LDAP support LDAP_RES_SEARCH_
2221 REFERENCE, so I have modified the code to exclude the patch when that macro
2224 55. Some experimental protocols are using DNS PTR records for new purposes. The
2225 keys for these records are domain names, not reversed IP addresses. The
2226 dnsdb PTR lookup now tests whether its key is an IP address. If not, it
2227 leaves it alone. Component reversal etc. now happens only for IP addresses.
2230 56. Improve error message when ldap_search() fails in OpenLDAP or Solaris LDAP.
2232 57. Double the size of the debug message buffer (to 2048) so that more of very
2233 long debug lines gets shown.
2235 58. The exicyclog utility now does better if the number of log files to keep
2236 exceeds 99. In this case, it numbers them 001, 002 ... instead of 01, 02...
2238 59. Two changes related to the smtp_active_hostname option:
2240 (1) $smtp_active_hostname is now available as a variable.
2241 (2) The default for smtp_banner uses $smtp_active_hostname instead
2242 of $primary_hostname.
2244 60. The host_aton() function is supposed to be passed a string that is known
2245 to be a valid IP address. However, in the case of IPv6 addresses, it was
2246 not checking this. This is a hostage to fortune. Exim now panics and dies
2247 if the condition is not met. A case was found where this could be provoked
2248 from a dnsdb PTR lookup with an IPv6 address that had more than 8
2249 components; fortuitously, this particular loophole had already been fixed
2250 by change 4.50/55 above.
2252 If there are any other similar loopholes, the new check in host_aton()
2253 itself should stop them being exploited. The report I received stated that
2254 data on the command line could provoke the exploit when Exim was running as
2255 exim, but did not say which command line option was involved. All I could
2256 find was the use of -be with a bad dnsdb PTR lookup, and in that case it is
2257 running as the user.
2260 61. There was a buffer overflow vulnerability in the SPA authentication code
2261 (which came originally from the Samba project). I have added a test to the
2262 spa_base64_to_bits() function which I hope fixes it.
2265 62. Configuration update for GNU/Hurd and variations. Updated Makefile-GNU and
2266 os.h-GNU, and added configuration files for GNUkFreeBSD and GNUkNetBSD.
2268 63. The daemon start-up calls getloadavg() while still root for those OS that
2269 need the first call to be done as root, but it missed one case: when
2270 deliver_queue_load_max is set with deliver_drop_privilege. This is
2271 necessary for the benefit of the queue runner, because there is no re-exec
2272 when deliver_drop_privilege is set.
2274 64. A call to exiwhat cut short delays set up by "delay" modifiers in ACLs.
2275 This has been fixed.
2277 65. Caching of lookup data for "hosts =" ACL conditions, when a named host list
2278 was in use, was not putting the data itself into the right store pool;
2279 consequently, it could be overwritten for a subsequent message in the same
2280 SMTP connection. (Fix 4.40/11 dealt with the non-cache case, but overlooked
2283 66. Added hosts_max_try_hardlimit to the smtp transport, default 50.
2285 67. The string_is_ip_address() function returns 0, 4, or 6, for "no an IP
2286 address", "IPv4 address", and "IPv6 address", respectively. Some calls of
2287 the function were treating the return as a boolean value, which happened to
2288 work because 0=false and not-0=true, but is not correct code.
2290 68. The host_aton() function was not handling scoped IPv6 addresses (those
2291 with, for example, "%eth0" on the end) correctly.
2293 69. Fixed some compiler warnings in acl.c for the bitmaps specified with
2294 negated items (that is, ~something) in unsigned ints. Some compilers
2295 apparently mutter when there is no cast.
2297 70. If an address verification called from an ACL failed, and did not produce a
2298 user-specific message (i.e. there was only a "system" message), nothing was
2299 put in $acl_verify_message. In this situation, it now puts the system
2302 71. Change 4.23/11 added synchronization checking at the start of an SMTP
2303 session; change 4.31/43 added the unwanted input to the log line - except
2304 that it did not do this in the start of session case. It now does.
2306 72. After a timeout in a callout SMTP session, Exim still sent a QUIT command.
2307 This is wrong and can cause the other end to generate a synchronization
2308 error if it is another Exim or anything else that does the synchronization
2309 check. A QUIT command is no longer sent after a timeout.
2311 73. $host_lookup_deferred has been added, to make it easier to detect DEFERs
2312 during host lookups.
2314 74. The defer_ok option of callout verification was not working if it was used
2315 when verifying addresses in header lines, that is, for this case:
2317 verify = header_sender/callout=defer_ok
2319 75. A backgrounded daemon closed stdin/stdout/stderr on entry; this meant that
2320 those file descriptors could be used for SMTP connections. If anything
2321 wrote to stderr (the example that came up was "warn" in embedded Perl), it
2322 could be sent to the SMTP client, causing chaos. The daemon now opens
2323 stdin, stdout, and stderr to /dev/null when it puts itself into the
2326 76. Arrange for output from Perl's "warn" command to be written to Exim's main
2327 log by default. The user can override this with suitable Perl magic.
2329 77. The use of log_message on a "discard" ACL verb, which is supposed to add to
2330 the log message when discard triggers, was not working for the DATA ACL or
2331 for the non-SMTP ACL.
2333 78. Error message wording change in sieve.c.
2335 79. If smtp_accept_max_per_host was set, the number of connections could be
2336 restricted to fewer than expected, because the daemon was trying to set up
2337 a new connection before checking whether the processes handling previous
2338 connections had finished. The check for completed processes is now done
2339 earlier. On busy systems, this bug wouldn't be noticed because something
2340 else would have woken the daemon, and it would have reaped the completed
2343 80. If a message was submitted locally by a user whose login name contained one
2344 or more spaces (ugh!), the spool file that Exim wrote was not re-readable.
2345 It caused a spool format error. I have fixed the spool reading code. A
2346 related problem was that the "from" clause in the Received: line became
2347 illegal because of the space(s). It is now covered by ${quote_local_part.
2349 81. Included the latest eximstats from Steve (adds average sizes to HTML Top
2352 82. Updated OS/Makefile-AIX as per message from Mike Meredith.
2354 83. Patch from Sieve maintainer to fix unterminated string problem in
2355 "vacation" handling.
2357 84. Some minor changes to the Linux configuration files to help with other
2358 OS variants using glibc.
2360 85. One more patch for Sieve to update vacation handling to latest spec.
2363 ----------------------------------------------------
2364 See the note above about the 4.44 and 4.50 releases.
2365 ----------------------------------------------------
2371 1. Change 4.43/35 introduced a bug that caused file counts to be
2372 incorrectly computed when quota_filecount was set in an appendfile
2375 2. Closing a stable door: arrange to panic-die if setitimer() ever fails. The
2376 bug fixed in 4.43/37 would have been diagnosed quickly if this had been in
2379 3. Give more explanation in the error message when the command for a transport
2380 filter fails to execute.
2382 4. There are several places where Exim runs a non-Exim command in a
2383 subprocess. The SIGUSR1 signal should be disabled for these processes. This
2384 was being done only for the command run by the queryprogram router. It is
2385 now done for all such subprocesses. The other cases are: ${run, transport
2386 filters, and the commands run by the lmtp and pipe transports.
2388 5. Some older OS have a limit of 256 on the maximum number of file
2389 descriptors. Exim was using setrlimit() to set 1000 as a large value
2390 unlikely to be exceeded. Change 4.43/17 caused a lot of logging on these
2391 systems. I've change it so that if it can't get 1000, it tries for 256.
2393 6. "control=submission" was allowed, but had no effect, in a DATA ACL. This
2394 was an oversight, and furthermore, ever since the addition of extra
2395 controls (e.g. 4.43/32), the checks on when to allow different forms of
2396 "control" were broken. There should now be diagnostics for all cases when a
2397 control that does not make sense is encountered.
2399 7. $recipients is now available in the predata ACL (oversight).
2401 8. Tidy the search cache before the fork to do a delivery from a message
2402 received from the command line. Otherwise the child will trigger a lookup
2403 failure and thereby defer the delivery if it tries to use (for example) a
2404 cached ldap connection that the parent has called unbind on.
2406 9. If verify=recipient was followed by verify=sender in a RCPT ACL, the value
2407 of $address_data from the recipient verification was clobbered by the
2408 sender verification.
2410 10. If FIXED_NEVER_USERS was defined, but empty, Exim was assuming the uid 0
2411 was its contents. (It was OK if the option was not defined at all.)
2413 11. A "Completed" log line is now written for messages that are removed from
2414 the spool by the -Mrm option.
2416 12. $host_address is now set to the target address during the checking of
2417 ignore_target_hosts.
2419 13. When checking ignore_target_hosts for an ipliteral router, no host name was
2420 being passed; this would have caused $sender_host_name to have been used if
2421 matching the list had actually called for a host name (not very likely,
2422 since this list is usually IP addresses). A host name is now passed as
2425 14. Changed the calls that set up the SIGCHLD handler in the daemon to use the
2426 code that specifies a non-restarting handler (typically sigaction() in
2427 modern systems) in an attempt to fix a rare and obscure crash bug.
2429 15. Narrowed the window for a race in the daemon that could cause it to ignore
2430 SIGCHLD signals. This is not a major problem, because they are used only to
2431 wake it up if nothing else does.
2433 16. A malformed maildirsize file could cause Exim to calculate negative values
2434 for the mailbox size or file count. Odd effects could occur as a result.
2435 The maildirsize information is now recalculated if the size or filecount
2438 17. Added HAVE_SYS_STATVFS_H to the os.h file for Linux, as it has had this
2439 support for a long time. Removed HAVE_SYS_VFS_H.
2441 18. Updated exipick to current release from John Jetmore.
2443 19. Allow an empty sender to be matched against a lookup in an address list.
2444 Previously the only cases considered were a regular expression, or an
2447 20. Exim went into a mad DNS lookup loop when doing a callout where the
2448 host was specified on the transport, if the DNS lookup yielded more than
2451 21. The RFC2047 encoding function was originally intended for short strings
2452 such as real names; it was not keeping to the 75-character limit for
2453 encoded words that the RFC imposes. It now respects the limit, and
2454 generates multiple encoded words if necessary. To be on the safe side, I
2455 have increased the buffer size for the ${rfc2047: expansion operator from
2458 22. Failure to deliver a bounce message always caused it to be frozen, even if
2459 there was an errors_to setting on the router. The errors_to setting is now
2462 23. If an IPv6 address is given for -bh or -bhc, it is now converted to the
2463 canonical form (fully expanded) before being placed in
2464 $sender_host_address.
2466 24. Updated eximstats to version 1.33
2468 25. Include certificate and key file names in error message when GnuTLS fails
2469 to set them up, because the GnuTLS error message doesn't include the name
2470 of the failing file when there is a problem reading it.
2472 26. Expand error message when OpenSSL has problems setting up cert/key files.
2475 27. Reset the locale to "C" after calling embedded Perl, in case it was changed
2476 (this can affect the format of dates).
2478 28. exim_tidydb, when checking for the continued existence of a message for
2479 which it has found a message-specific retry record, was not finding
2480 messages that were in split spool directories. Consequently, it was
2481 deleting retry records that should have stayed in existence.
2483 29. eximstats updated to version 1.35
2484 1.34 - allow eximstats to parse syslog lines as well as mainlog lines
2485 1.35 - bugfix such that pie charts by volume are generated correctly
2487 30. The SPA authentication driver was not abandoning authentication and moving
2488 on to the next authenticator when an expansion was forced to fail,
2489 contradicting the general specification for all authenticators. Instead it
2490 was generating a temporary error. It now behaves as specified.
2492 31. The default ordering of permitted cipher suites for GnuTLS was pessimal
2493 (the order specifies the preference for clients). The order is now AES256,
2494 AES128, 3DES, ARCFOUR128.
2496 31. Small patch to Sieve code - explicitly set From: when generating an
2499 32. Exim crashed if a remote delivery caused a very long error message to be
2500 recorded - for instance if somebody sent an entire SpamAssassin report back
2501 as a large number of 550 error lines. This bug was coincidentally fixed by
2502 increasing the size of one of Exim's internal buffers (big_buffer) that
2503 happened as part of the Exiscan merge. However, to be on the safe side, I
2504 have made the code more robust (and fixed the comments that describe what
2507 33. Some experimental protocols are using DNS PTR records for new purposes. The
2508 keys for these records are domain names, not reversed IP addresses. The
2509 dnsdb PTR lookup now tests whether its key is an IP address. If not, it
2510 leaves it alone. Component reversal etc. now happens only for IP addresses.
2513 34. The host_aton() function is supposed to be passed a string that is known
2514 to be a valid IP address. However, in the case of IPv6 addresses, it was
2515 not checking this. This is a hostage to fortune. Exim now panics and dies
2516 if the condition is not met. A case was found where this could be provoked
2517 from a dnsdb PTR lookup with an IPv6 address that had more than 8
2518 components; fortuitously, this particular loophole had already been fixed
2519 by change 4.50/55 or 4.44/33 above.
2521 If there are any other similar loopholes, the new check in host_aton()
2522 itself should stop them being exploited. The report I received stated that
2523 data on the command line could provoke the exploit when Exim was running as
2524 exim, but did not say which command line option was involved. All I could
2525 find was the use of -be with a bad dnsdb PTR lookup, and in that case it is
2526 running as the user.
2529 35. There was a buffer overflow vulnerability in the SPA authentication code
2530 (which came originally from the Samba project). I have added a test to the
2531 spa_base64_to_bits() function which I hope fixes it.
2534 36. The daemon start-up calls getloadavg() while still root for those OS that
2535 need the first call to be done as root, but it missed one case: when
2536 deliver_queue_load_max is set with deliver_drop_privilege. This is
2537 necessary for the benefit of the queue runner, because there is no re-exec
2538 when deliver_drop_privilege is set.
2540 37. Caching of lookup data for "hosts =" ACL conditions, when a named host list
2541 was in use, was not putting the data itself into the right store pool;
2542 consequently, it could be overwritten for a subsequent message in the same
2543 SMTP connection. (Fix 4.40/11 dealt with the non-cache case, but overlooked
2546 38. Sometimes the final signoff response after QUIT could fail to get
2547 transmitted in the non-TLS case. Testing !tls_active instead of tls_active
2548 < 0 before doing a fflush(). This bug looks as though it goes back to the
2549 introduction of TLS in release 3.20, but "sometimes" must have been rare
2550 because the tests only now provoked it.
2556 1. Fixed a longstanding but relatively impotent bug: a long time ago, before
2557 PIPELINING, the function smtp_write_command() used to return TRUE or FALSE.
2558 Now it returns an integer. A number of calls were still expecting a T/F
2559 return. Fortuitously, in all cases, the tests worked in OK situations,
2560 which is the norm. However, things would have gone wrong on any write
2561 failures on the smtp file descriptor. This function is used when sending
2562 messages over SMTP and also when doing verify callouts.
2564 2. When Exim is called to do synchronous delivery of a locally submitted
2565 message (the -odf or -odi options), it no longer closes stderr before doing
2568 3. Implemented the mua_wrapper option.
2570 4. Implemented mx_fail_domains and srv_fail_domains for the dnslookup router.
2572 5. Implemented the functions header_remove(), header_testname(),
2573 header_add_at_position(), and receive_remove_recipient(), and exported them
2576 6. If an ACL "warn" statement specified the addition of headers, Exim already
2577 inserted X-ACL-Warn: at the start if there was no header name. However, it
2578 was not making this test for the second and subsequent header lines if
2579 there were newlines in the string. This meant that an invalid header could
2580 be inserted if Exim was badly configured.
2582 7. Allow an ACL "warn" statement to add header lines at the start or after all
2583 the Received: headers, as well as at the end.
2585 8. Added the rcpt_4xx retry error code.
2587 9. Added postmaster_mailfrom=xxx to callout verification option.
2589 10. Added mailfrom=xxxx to the callout verification option, for verify=
2592 11. ${substr_1_:xxxx} and ${substr__3:xxxx} are now diagnosed as syntax errors
2593 (they previously behaved as ${substr_1_0:xxxx} and ${substr:_0_3:xxxx}).
2595 12. Inserted some casts to stop certain compilers warning when using pointer
2596 differences as field lengths or precisions in printf-type calls (mostly
2597 affecting debugging statements).
2599 13. Added optional readline() support for -be (dynamically loaded).
2601 14. Obscure bug fix: if a message error (e.g. 4xx to MAIL) happened within the
2602 same clock tick as a message's arrival, so that its received time was the
2603 same as the "first fail" time on the retry record, and that message
2604 remained on the queue past the ultimate address timeout, every queue runner
2605 would try a delivery (because it was past the ultimate address timeout) but
2606 after another failure, the ultimate address timeout, which should have then
2607 bounced the address, did not kick in. This was a "< instead of <=" error;
2608 in most cases the first failure would have been in the next clock tick
2609 after the received time, and all would be well.
2611 15. The special items beginning with @ in domain lists (e.g. @mx_any) were not
2612 being recognized when the domain list was tested by the match_domain
2613 condition in an expansion string.
2615 16. Added the ${str2b64: operator.
2617 17. Exim was always calling setrlimit() to set a large limit for the number of
2618 processes, without checking whether the existing limit was already
2619 adequate. (It did check for the limit on file descriptors.) Furthermore,
2620 errors from getrlimit() and setrlimit() were being ignored. Now they are
2621 logged to the main and panic logs, but Exim does carry on, to try to do its
2622 job under whatever limits there are.
2624 18. Imported PCRE 5.0.
2626 19. Trivial typo in log message " temporarily refused connection" (the leading
2629 20. If the log selector return_path_on_delivery was set and an address was
2630 redirected to /dev/null, the delivery process crashed because it assumed
2631 that a return path would always be set for a "successful" delivery. In this
2632 case, the whole delivery is bypassed as an optimization, and therefore no
2635 21. Internal re-arrangement: the function for sending a challenge and reading
2636 a response while authentication was assuming a zero-terminated challenge
2637 string. It's now changed to take a pointer and a length, to allow for
2638 binary data in such strings.
2640 22. Added the cyrus_sasl authenticator (code supplied by MBM).
2642 23. Exim was not respecting finduser_retries when seeking the login of the
2643 uid under which it was called; it was always trying 10 times. (The default
2644 setting of finduser_retries is zero.) Also, it was sleeping after the final
2645 failure, which is pointless.
2647 24. Implemented tls_on_connect_ports.
2649 25. Implemented acl_smtp_predata.
2651 26. If the domain in control=submission is set empty, Exim assumes that the
2652 authenticated id is a complete email address when it generates From: or
2653 Sender: header lines.
2655 27. Added "#define SOCKLEN_T int" to OS/os.h-SCO and OS/os.h-SCO_SV. Also added
2656 definitions to OS/Makefile-SCO and OS/Makefile-SCO_SV that put basename,
2657 chown and chgrp in /bin and hostname in /usr/bin.
2659 28. Exim was keeping the "process log" file open after each use, just as it
2660 does for the main log. This opens the possibility of it remaining open for
2661 long periods when the USR1 signal hits a daemon. Occasional processlog
2662 errors were reported, that could have been caused by this. Anyway, it seems
2663 much more sensible not to leave this file open at all, so that is what now
2666 29. The long-running daemon process does not normally write to the log once it
2667 has entered its main loop, and it closes the log before doing so. This is
2668 so that log files can straightforwardly be renamed and moved. However,
2669 there are a couple of unusual error situations where the daemon does write
2670 log entries, and I had neglected to close the log afterwards.
2672 30. The text of an SMTP error response that was received during a remote
2673 delivery was being truncated at 512 bytes. This is too short for some of
2674 the long messages that one sometimes sees. I've increased the limit to
2677 31. It is now possible to make retry rules that apply only when a message has a
2678 specific sender, in particular, an empty sender.
2680 32. Added "control = enforce_sync" and "control = no_enforce_sync". This makes
2681 it possible to be selective about when SMTP synchronization is enforced.
2683 33. Added "control = caseful_local_part" and "control = "caselower_local_part".
2685 32. Implemented hosts_connection_nolog.
2687 33. Added an ACL for QUIT.
2689 34. Setting "delay_warning=" to disable warnings was not working; it gave a
2692 35. Added mailbox_size and mailbox_filecount to appendfile.
2694 36. Added control = no_multiline_responses to ACLs.
2696 37. There was a bug in the logic of the code that waits for the clock to tick
2697 in the case where the clock went backwards by a substantial amount such
2698 that the microsecond fraction of "now" was more than the microsecond
2699 fraction of "then" (but the whole seconds number was less).
2701 38. Added support for the libradius Radius client library this is found on
2702 FreeBSD (previously only the radiusclient library was supported).
2708 1. When certain lookups returned multiple values in the form name=value, the
2709 quoting of the values was not always being done properly. Specifically:
2710 (a) If the value started with a double quote, but contained no whitespace,
2712 (b) If the value contained whitespace other than a space character (i.e.
2713 tabs or newlines or carriage returns) it was not quoted.
2714 This fix has been applied to the mysql and pgsql lookups by writing a
2715 separate quoting function and calling it from the lookup code. The fix
2716 should probably also be applied to nisplus, ibase and oracle lookups, but
2717 since I cannot test any of those, I have not disturbed their existing code.
2719 2. A hit in the callout cache for a specific address caused a log line with no
2720 reason for rejecting RCPT. Now it says "Previous (cached) callout
2721 verification failure".
2723 3. There was an off-by-one bug in the queryprogram router. An over-long
2724 return line was truncated at 256 instead of 255 characters, thereby
2725 overflowing its buffer with the terminating zero. As well as fixing this, I
2726 have increased the buffer size to 1024 (and made a note to document this).
2728 4. If an interrupt, such as the USR1 signal that is send by exiwhat, arrives
2729 when Exim is waiting for an SMTP response from a remote server, Exim
2730 restarts its select() call on the socket, thereby resetting its timeout.
2731 This is not a problem when such interrupts are rare. Somebody set up a cron
2732 job to run exiwhat every 2 minutes, which is less than the normal select()
2733 timeout (5 or 10 minutes). This meant that the select() timeout never
2734 kicked in because it was always reset. I have fixed this by comparing the
2735 time when an interrupt arrives with the time at the start of the first call
2736 to select(). If more time than the timeout has elapsed, the interrupt is
2737 treated as a timeout.
2739 5. Some internal re-factoring in preparation for the addition of Sieve
2740 extensions (by MH). In particular, the "personal" test is moved to a
2741 separate function, and given an option for scanning Cc: and Bcc: (which is
2742 not set for Exim filters).
2744 6. When Exim created an email address using the login of the caller as the
2745 local part (e.g. when creating a From: or Sender: header line), it was not
2746 quoting the local part when it contained special characters such as @.
2748 7. Installed new OpenBSD configuration files.
2750 8. Reworded some messages for syntax errors in "and" and "or" conditions to
2751 try to make them clearer.
2753 9. Callout options, other than the timeout value, were being ignored when
2754 verifying sender addresses in header lines. For example, when using
2756 verify = header_sender/callout=no_cache
2758 the cache was (incorrectly) being used.
2760 10. Added a missing instance of ${EXE} to the exim_install script; this affects
2761 only the Cygwin environment.
2763 11. When return_path_on_delivery was set as a log selector, if different remote
2764 addresses in the same message used different return paths and parallel
2765 remote delivery occurred, the wrong values would sometimes be logged.
2766 (Whenever a remote delivery process finished, the return path value from
2767 the most recently started remote delivery process was logged.)
2769 12. RFC 3848 specifies standard names for the "with" phrase in Received: header
2770 lines when AUTH and/or TLS are in use. This is the "received protocol"
2771 field. Exim used to use "asmtp" for authenticated SMTP, without any
2772 indication (in the protocol name) for TLS use. Now it follows the RFC and
2773 uses "esmtpa" if the connection is authenticated, "esmtps" if it is
2774 encrypted, and "esmtpsa" if it is both encrypted and authenticated. These
2775 names appear in log lines as well as in Received: header lines.
2777 13. Installed MH's patches for Sieve to add the "copy" and "vacation"
2778 extensions, and comparison tests, and to fix some bugs.
2780 14. Changes to the "personal" filter test:
2782 (1) The test was buggy in that it was just doing the equivalent of
2783 "contains" tests on header lines. For example, if a user's address was
2784 anne@some.where, the "personal" test would incorrectly be true for
2786 To: susanne@some.where
2788 This test is now done by extracting each address from the header in turn,
2789 and checking the entire address. Other tests that are part of "personal"
2790 are now done using regular expressions (for example, to check local parts
2791 of addresses in From: header lines).
2793 (2) The list of non-personal local parts in From: addresses has been
2794 extended to include "listserv", "majordomo", "*-request", and "owner-*",
2795 taken from the Sieve specification recommendations.
2797 (3) If the message contains any header line starting with "List-" it is
2798 treated as non-personal.
2800 (4) The test for "circular" in the Subject: header line has been removed
2801 because it now seems ill-conceived.
2803 15. Minor typos in src/EDITME comments corrected.
2805 16. Installed latest exipick from John Jetmore.
2807 17. If headers_add on a router specified a text string that was too long for
2808 string_sprintf() - that is, longer than 8192 bytes - Exim panicked. The use
2809 of string_sprintf() is now avoided.
2811 18. $message_body_size was not set (it was always zero) when running the DATA
2812 ACL and the local_scan() function.
2814 19. For the "mail" command in an Exim filter, no default was being set for
2815 the once_repeat time, causing a random time value to be used if "once" was
2816 specified. (If the value happened to be <= 0, no repeat happened.) The
2817 default is now 0s, meaning "never repeat". The "vacation" command was OK
2818 (its default is 7d). It's somewhat surprising nobody ever noticed this bug
2819 (I found it when inspecting the code).
2821 20. There is now an overall timeout for performing a callout verification. It
2822 defaults to 4 times the callout timeout, which applies to individual SMTP
2823 commands during the callout. The overall timeout applies when there is more
2824 than one host that can be tried. The timeout is checked before trying the
2825 next host. This prevents very long delays if there are a large number of
2826 hosts and all are timing out (e.g. when the network connections are timing
2827 out). The value of the overall timeout can be changed by specifying an
2828 additional sub-option for "callout", called "maxwait". For example:
2830 verify = sender/callout=5s,maxwait=20s
2832 21. Add O_APPEND to the open() call for maildirsize files (Exim already seeks
2833 to the end before writing, but this should make it even safer).
2835 22. Exim was forgetting that it had advertised PIPELINING for the second and
2836 subsequent messages on an SMTP connection. It was also not resetting its
2837 memory on STARTTLS and an internal HELO.
2839 23. When Exim logs an SMTP synchronization error within a session, it now
2840 records whether PIPELINING has been advertised or not.
2842 24. Added 3 instances of "(long int)" casts to time_t variables that were being
2843 formatted using %ld, because on OpenBSD (and perhaps others), time_t is int
2844 rather than long int.
2846 25. Installed the latest Cygwin configuration files from the Cygwin maintainer.
2848 26. Added the never_mail option to autoreply.
2854 1. A reorganization of the code in order to implement 4.40/8 caused a daemon
2855 crash if the getsockname() call failed; this can happen if a connection is
2856 closed very soon after it is established. The problem was simply in the
2857 order in which certain operations were done, causing Exim to try to write
2858 to the SMTP stream before it had set up the file descriptor. The bug has
2859 been fixed by making things happen in the correct order.
2865 1. If "drop" was used in a DATA ACL, the SMTP output buffer was not flushed
2866 before the connection was closed, thus losing the rejection response.
2868 2. Commented out the definition of SOCKLEN_T in os.h-SunOS5. It is needed for
2869 some early Solaris releases, but causes trouble in current releases where
2870 socklen_t is defined.
2872 3. When std{in,out,err} are closed, re-open them to /dev/null so that they
2875 4. Minor refactoring of os.c-Linux to avoid compiler warning when IPv6 is not
2878 5. Refactoring in expand.c to improve memory usage. Pre-allocate a block so
2879 that releasing the top of it at the end releases what was used for sub-
2880 expansions (unless the block got too big). However, discard this block if
2881 the first thing is a variable or header, so that we can use its block when
2882 it is dynamic (useful for very large $message_headers, for example).
2884 6. Lookups now cache *every* query, not just the most recent. A new, separate
2885 store pool is used for this. It can be recovered when all lookup caches are
2886 flushed. Lookups now release memory at the end of their result strings.
2887 This has involved some general refactoring of the lookup sources.
2889 7. Some code has been added to the store_xxx() functions to reduce the amount
2890 of flapping under certain conditions.
2892 8. log_incoming_interface used to affect only the <= reception log lines. Now
2893 it causes the local interface and port to be added to several more SMTP log
2894 lines, for example "SMTP connection from", and rejection lines.
2896 9. The Sieve author supplied some patches for the doc/README.SIEVE file.
2898 10. Added a conditional definition of _BSD_SOCKLEN_T to os.h-Darwin.
2900 11. If $host_data was set by virtue of a hosts lookup in an ACL, its value
2901 could be overwritten at the end of the current message (or the start of a
2902 new message if it was set in a HELO ACL). The value is now preserved for
2903 the duration of the SMTP connection.
2905 12. If a transport had a headers_rewrite setting, and a matching header line
2906 contained an unqualified address, that address was qualified, even if it
2907 did not match any rewriting rules. The underlying bug was that the values
2908 of the flags that permit the existence of unqualified sender and recipient
2909 addresses in header lines (set by {sender,recipient}_unqualified_hosts for
2910 non-local messages, and by -bnq for local messages) were not being
2911 preserved with the message after it was received.
2913 13. When Exim was logging an SMTP synchronization error, it could sometimes log
2914 "next input=" as part of the text comprising the host identity instead of
2915 the correct text. The code was using the same buffer for two different
2916 strings. However, depending on which order the printing function evaluated
2917 its arguments, the bug did not always show up. Under Linux, for example, my
2918 test suite worked just fine.
2920 14. Exigrep contained a use of Perl's "our" scoping after change 4.31/70. This
2921 doesn't work with some older versions of Perl. It has been changed to "my",
2922 which in any case is probably the better facility to use.
2924 15. A really picky compiler found some instances of statements for creating
2925 error messages that either had too many or two few arguments for the format
2928 16. The size of the buffer for calls to the DNS resolver has been increased
2929 from 1024 to 2048. A larger buffer is needed when performing PTR lookups
2930 for addresses that have a lot of PTR records. This alleviates a problem; it
2931 does not fully solve it.
2933 17. A dnsdb lookup for PTR records that receives more data than will fit in the
2934 buffer now truncates the list and logs the incident, which is the same
2935 action as happens when Exim is looking up a host name and its aliases.
2936 Previously in this situation something unpredictable would happen;
2937 sometimes it was "internal error: store_reset failed".
2939 18. If a server dropped the connection unexpectedly when an Exim client was
2940 using GnuTLS and trying to read a response, the client delivery process
2941 crashed while trying to generate an error log message.
2943 19. If a "warn" verb in an ACL added multiple headers to a message in a single
2944 string, for example:
2946 warn message = H1: something\nH2: something
2948 the text was added as a single header line from Exim's point of view
2949 though it ended up OK in the delivered message. However, searching for the
2950 second and subsequent header lines using $h_h2: did not work. This has been
2951 fixed. Similarly, if a system filter added multiple headers in this way,
2952 the routers could not see them.
2954 20. Expanded the error message when iplsearch is called with an invalid key to
2955 suggest using net-iplsearch in a host list.
2957 21. When running tests using -bh, any delays imposed by "delay" modifiers in
2958 ACLs are no longer actually imposed (and a message to that effect is
2961 22. If a "gecos" field in a passwd entry contained escaped characters, in
2962 particular, if it contained a \" sequence, Exim got it wrong when building
2963 a From: or a Sender: header from that name. A second bug also caused
2964 incorrect handling when an unquoted " was present following a character
2965 that needed quoting.
2967 23. "{crypt}" as a password encryption mechanism for a "crypteq" expansion item
2968 was not being matched caselessly.
2970 24. Arranged for all hyphens in the exim.8 source to be escaped with
2973 25. Change 16 of 4.32, which reversed 71 or 4.31 didn't quite do the job
2974 properly. Recipient callout cache records were still being keyed to include
2975 the sender, even when use_sender was set false. This led to far more
2976 callouts that were necessary. The sender is no longer included in the key
2977 when use_sender is false.
2979 26. Added "control = submission" modifier to ACLs.
2981 27. Added the ${base62d: operator to decode base 62 numbers.
2983 28. dnsdb lookups can now access SRV records.
2985 29. CONFIGURE_OWNER can be set at build time to define an alternative owner for
2986 the configuration file.
2988 30. The debug message "delivering xxxxxx-xxxxxx-xx" is now output in verbose
2989 (-v) mode. This makes the output for a verbose queue run more intelligible.
2991 31. Added a use_postmaster feature to recipient callouts.
2993 32. Added the $body_zerocount variable, containing the number of binary zero
2994 bytes in the message body.
2996 33. The time of last modification of the "new" subdirectory is now used as the
2997 "mailbox time last read" when there is a quota error for a maildir
3000 34. Added string comparison operators lt, lti, le, lei, gt, gti, ge, gei.
3002 35. Added +ignore_unknown as a special item in host lists.
3004 36. Code for decoding IPv6 addresses in host lists is now included, even if
3005 IPv6 support is not being compiled. This fixes a bug in which an IPv6
3006 address was recognized as an IP address, but was then not correctly decoded
3007 into binary, causing unexpected and incorrect effects when compared with
3014 1. Very minor rewording of debugging text in manualroute to say "list of
3015 hosts" instead of "hostlist".
3017 2. If verify=header_syntax was set, and a header line with an unqualified
3018 address (no domain) and a large number of spaces between the end of the
3019 name and the colon was received, the reception process suffered a buffer
3020 overflow, and (when I tested it) crashed. This was caused by some obsolete
3021 code that should have been removed. The fix is to remove it!
3023 3. When running in the test harness, delay a bit after writing a bounce
3024 message to get a bit more predictability in the log output.
3026 4. Added a call to search_tidyup() just before forking a reception process. In
3027 theory, someone could use a lookup in the expansion of smtp_accept_max_
3028 per_host which, without the tidyup, could leave open a database connection.
3030 5. Added the variables $recipient_data and $sender_data which get set from a
3031 lookup success in an ACL "recipients" or "senders" condition, or a router
3032 "senders" option, similar to $domain_data and $local_part_data.
3034 6. Moved the writing of debug_print from before to after the "senders" test
3037 7. Change 4.31/66 (moving the time when the Received: is generated) caused
3038 problems for message scanning, either using a data ACL, or using
3039 local_scan() because the Received: header was not generated till after they
3040 were called (in order to set the time as the time of reception completion).
3041 I have revised the way this works. The header is now generated after the
3042 body is received, but before the ACL or local_scan() are called. After they
3043 are run, the timestamp in the header is updated.
3049 1. Change 4.24/6 introduced a bug because the SIGALRM handler was disabled
3050 before starting a queue runner without re-exec. This happened only when
3051 deliver_drop_privilege was set or when the Exim user was set to root. The
3052 effect of the bug was that timeouts during subsequent deliveries caused
3053 crashes instead of being properly handled. The handler is now left at its
3054 default (and expected) setting.
3056 2. The other case in which a daemon avoids a re-exec is to deliver an incoming
3057 message, again when deliver_drop_privilege is set or Exim is run as root.
3058 The bug described in (1) was not present in this case, but the tidying up
3059 of the other signals was missing. I have made the two cases consistent.
3061 3. The ignore_target_hosts setting on a manualroute router was being ignored
3062 for hosts that were looked up using the /MX notation.
3064 4. Added /ignore=<ip list> feature to @mx_any, @mx_primary, and @mx_secondary
3067 5. Change 4.31/55 was buggy, and broke when there was a rewriting rule that
3068 operated on the sender address. After changing the $sender_address to <>
3069 for the sender address verify, Exim was re-instated it as the original
3070 (before rewriting) address, but remembering that it had rewritten it, so it
3071 wasn't rewriting it again. This bug also had the effect of breaking the
3072 sender address verification caching when the sender address was rewritten.
3074 6. The ignore_target_hosts option was being ignored by the ipliteral router.
3075 This has been changed so that if the ip literal address matches
3076 ignore_target_hosts, the router declines.
3078 7. Added expansion conditions match_domain, match_address, and match_local_
3079 part (NOT match_host).
3081 8. The placeholder for the Received: header didn't have a length field set.
3083 9. Added code to Exim itself and to exim_lock to test for a specific race
3084 condition that could lead to file corruption when using MBX delivery. The
3085 issue is with the lockfile that is created in /tmp. If this file is removed
3086 after a process has opened it but before that process has acquired a lock,
3087 there is the potential for a second process to recreate the file and also
3088 acquire a lock. This could lead to two Exim processes writing to the file
3089 at the same time. The added code performs the same test as UW imapd; it
3090 checks after acquiring the lock that its file descriptor still refers to
3091 the same named file.
3093 10. The buffer for building added header lines was of fixed size, 8192 bytes.
3094 It is now parameterized by HEADER_ADD_BUFFER_SIZE and this can be adjusted
3097 11. Added the smtp_active_hostname option. If used, this will typically be made
3098 to depend on the incoming interface address. Because $interface_address is
3099 not set up until the daemon has forked a reception process, error responses
3100 that can happen earlier (such as "too many connections") no longer contain
3103 12. If an expansion in a condition on a "warn" statement fails because a lookup
3104 defers, the "warn" statement is abandoned, and the next ACL statement is
3105 processed. Previously this caused the whole ACL to be aborted.
3107 13. Added the iplsearch lookup type.
3109 14. Added ident_timeout as a log selector.
3111 15. Added tls_certificate_verified as a log selector.
3113 16. Added a global option tls_require_ciphers (compare the smtp transport
3114 option of the same name). This controls incoming TLS connections.
3116 17. I finally figured out how to make tls_require_ciphers do a similar thing
3117 in GNUtls to what it does in OpenSSL, that is, set up an appropriate list
3118 before starting the TLS session.
3120 18. Tabs are now shown as \t in -bP output.
3122 19. If the log selector return_path_on_delivery was set, Exim crashed when
3123 bouncing a message because it had too many Received: header lines.
3125 20. If two routers both had headers_remove settings, and the first one included
3126 a superfluous trailing colon, the final name in the first list and the
3127 first name in the second list were incorrectly joined into one item (with a
3128 colon in the middle).
3134 1. Added -C and -D options to the exinext utility, mainly to make it easier
3135 to include in the automated testing, but these could be helpful when
3136 multiple configurations are in use.
3138 2. The exinext utility was not formatting the output nicely when there was
3139 an alternate port involved in the retry record key, nor when there was a
3140 message id as well (for retries that were specific to a specific message
3141 and a specific host). It was also confused by IPv6 addresses, because of
3142 the additional colons they contain. I have fixed the IPv4 problem, and
3143 patched it up to do a reasonable job for IPv6.
3145 3. When there is an error after a MAIL, RCPT, or DATA SMTP command during
3146 delivery, the log line now contains "pipelined" if PIPELINING was used.
3148 4. An SMTP transport process used to panic and die if the bind() call to set
3149 an explicit outgoing interface failed. This has been changed; it is now
3150 treated in the same way as a connect() failure.
3152 5. A reference to $sender_host_name in the part of a conditional expansion
3153 that was being skipped was still causing a DNS lookup. This no longer
3156 6. The def: expansion condition was not recognizing references to header lines
3157 that used bh_ and bheader_.
3159 7. Added the _cache feature to named lists.
3161 8. The code for checking quota_filecount in the appendfile transport was
3162 allowing one more file than it should have been.
3164 9. For compatibility with Sendmail, the command line option
3172 and sets the incoming protocol and host name (for trusted callers). The
3173 host name and its colon can be omitted when only the protocol is to be set.
3174 Note the Exim already has two private options, -pd and -ps, that refer to
3175 embedded Perl. It is therefore impossible to set a protocol value of "d" or
3176 "s", but I don't think that's a major issue.
3178 10. A number of refactoring changes to the code, none of which should affect
3181 (a) The number of logging options was getting close to filling up the
3182 32-bit word that was used as a bit map. I have split them into two classes:
3183 those that are passed in the argument to log_write(), and those that are
3184 only ever tested independently outside of that function. These are now in
3185 separate 32-bit words, so there is plenty of room for expansion again.
3186 There is no change in the user interface or the logging behaviour.
3188 (b) When building, for example, log lines, the code previously used a
3189 macro that called string_cat() twice, in order to add two strings. This is
3190 not really sufficiently general. Furthermore, there was one instance where
3191 it was actually wrong because one of the argument was used twice, and in
3192 one call a function was used. (As it happened, calling the function twice
3193 did not affect the overall behaviour.) The macro has been replaced by a
3194 function that can join an arbitrary number of extra strings onto a growing
3197 (c) The code for expansion conditions now uses a table and a binary chop
3198 instead of a serial search (which was left over from when there were very
3199 few conditions). Also, it now recognizes conditions like "pam" even when
3200 the relevant support is not compiled in: a suitably worded error message is
3201 given if an attempt is made to use such a condition.
3203 11. Added ${time_interval:xxxxx}.
3205 12. A bug was causing one of the ddress fields not to be passed back correctly
3206 from remote delivery subprocesses. The field in question was not being
3207 subsequently used, so this caused to problems in practice.
3209 13. Added new log selectors queue_time and deliver_time.
3211 14. Might have fixed a bug in maildirsizefile handling that threw up
3212 "unexpected character" debug warnings, and recalculated the data
3213 unnecessarily. In any case, I expanded the warning message to give more
3216 15. Added the message "Restricted characters in address" to the statements in
3217 the default ACL that block characters like @ and % in local parts.
3219 16. Change 71 for release 4.31 proved to be much less benign that I imagined.
3220 Three changes have been made:
3222 (a) There was a serious bug; a negative response to MAIL caused the whole
3223 recipient domain to be cached as invalid, thereby blocking all messages
3224 to all local parts at the same domain, from all senders. This bug has
3225 been fixed. The domain is no longer cached after a negative response to
3226 MAIL if the sender used is not empty.
3228 (b) The default behaviour of using MAIL FROM:<> for recipient callouts has
3231 (c) A new callout option, "use_sender" has been added for people who want
3232 the modified behaviour.
3238 1. Removed "EXTRALIBS=-lwrap" from OS/Makefile-Unixware7 on the advice of
3241 2. Removed "LIBS = -lresolv" from OS/Makefile-Darwin as it is not needed, and
3242 indeed breaks things for older releases.
3244 3. Added additional logging to the case where there is a problem reading data
3245 from a filter that is running in a subprocess using a pipe, in order to
3246 try to track down a specific problem.
3248 4. Testing facility fudge: when running in the test harness and attempting
3249 to connect to 10.x.x.x (expecting a connection timeout) I'm now sometimes
3250 getting "No route to host". Convert this to a timeout.
3252 5. Define ICONV_ARG2_TYPE as "char **" for Unixware7 to avoid compiler
3255 6. Some OS don't have socklen_t but use size_t instead. This affects the
3256 fifth argument of getsockopt() amongst other things. This is now
3257 configurable by a macro called SOCKLEN_T which defaults to socklen_t, but
3258 can be set for individual OS. I have set it for SunOS5, OSF1, and
3259 Unixware7. Current versions of SunOS5 (aka Solaris) do have socklen_t, but
3260 some earlier ones do not.
3262 7. Change 4.30/15 was not doing the test caselessly.
3264 8. The standard form for an IPv6 address literal was being rejected by address
3265 parsing in, for example, MAIL and RCPT commands. An example of this kind of
3266 address is [IPv6:2002:c1ed:8229:10:202:2dff:fe07:a42a]. Exim now accepts
3267 this, as well as the form without the "IPv6" on the front (but only when
3268 address literals are enabled, of course).
3270 9. Added some casts to avoid compiler warnings in OS/os.c-Linux.
3272 10. Exim crashed if a message with an empty sender address specified by -f
3273 encountered a router with an errors_to setting. This could be provoked only
3274 by a command such as
3278 where an empty string was supplied; "<>" did not hit this bug.
3280 11. Installed PCRE release 4.5.
3282 12. If EHLO/HELO was rejected by an ACL, the value of $sender_helo_name
3283 remained set. It is now erased.
3285 13. exiqgrep wasn't working on MacOS X because it didn't correctly compute
3286 times from message ids (which are base 36 rather than the normal 62).
3288 14. "Expected" SMTP protocol errors that can arise when PIPELINING is in use
3289 were being counted as actual protocol errors, and logged if the log
3290 selector +smtp_protocol_error was set. One cannot be perfect in this test,
3291 but now, if PIPELINING has been advertised, RCPT following a rejected MAIL,
3292 and DATA following a set of rejected RCPTs do not count as protocol errors.
3293 In other words, Exim assumes they were pipelined, though this may not
3294 actually be the case. Of course, in all cases the client gets an
3295 appropriate error code.
3297 15. If a lookup fails in an ACL condition, a message about the failure may
3298 be available; it is used if testing the ACL cannot continue, because most
3299 such messages specify what the cause of the deferral is. However, some
3300 messages (e.g. "MYSQL: no data found") do not cause a defer. There was bug
3301 that caused an old message to be retained and used if a later statement
3302 caused a defer, replacing the real cause of the deferral.
3304 16. If an IP address had so many PTR records that the DNS lookup buffer
3305 was not large enough to hold them, Exim could crash while trying to process
3306 the truncated data. It now detects and logs this case.
3308 17. Further to 4.21/58, another change has been made: if (and only if) the
3309 first line of a message (the first header line) ends with CRLF, a bare LF
3310 in a subsequent header line has a space inserted after it, so as not to
3311 terminate the header.
3313 18. Refactoring: tidied an ugly bit of code in appendfile that copied data
3314 unnecessarily, used atoi() instead of strtol(), and didn't check the
3315 termination when getting file sizes from file names by regex.
3317 19. Completely re-implemented the support for maildirsize files, in the light
3318 of a number of problems with the previous contributed implementation
3319 (4.30/29). In particular:
3321 . If the quota is zero, the maildirsize file is maintained, but no quota is
3324 . If the maildir directory does not exist, it is created before any attempt
3325 to write a maildirsize file.
3327 . The quota value in the file is just a cache; if the quota is changed in
3328 the transport, the new value overrides.
3330 . A regular expression is available for excluding directories from the
3333 20. The autoreply transport checks the characters in options that define the
3334 message's headers; it allows continued headers, but it was checking with
3335 isspace() after an embedded newline instead of explicitly looking for a
3338 21. If all the "regular" hosts to which an address was routed had passed their
3339 expiry times, and had not reached their retry times, the address was
3340 bounced, even if fallback hosts were defined. Now Exim should go on to try
3343 22. Increased buffer sizes in the callout code from 1024 to 4096 to match the
3344 equivalent code in the SMTP transport. Some hosts send humungous responses
3345 to HELO/EHLO, more than 1024 it seems.
3347 23. Refactoring: code in filter.c used (void *) for "any old type" but this
3348 gives compiler warnings in some environments. I've now done it "properly",
3351 24. The replacement for inet_ntoa() that is used with gcc on IRIX systems
3352 (because of problems with the built-in one) was declared to return uschar *
3353 instead of char *, causing compiler failure.
3355 25. Fixed a file descriptor leak when processing alias/forward files.
3357 26. Fixed a minor format string issue in dbfn.c.
3359 27. Typo in exim.c: ("dmbnz" for "dbmnz").
3361 28. If a filter file refered to $h_xxx or $message_headers, and the headers
3362 contained RFC 2047 "words", Exim's memory could, under certain conditions,
3365 29. When a sender address is verified, it is cached, to save repeating the test
3366 when there is more than one recipient in a message. However, when the
3367 verification involves a callout, it is possible for different callout
3368 options to be set for different recipients. It is too complicated to keep
3369 track of this in the cache, so now Exim always runs a verification when a
3370 callout is required, relying on the callout cache for the optimization.
3371 The overhead is duplication of the address routing, but this should not be
3374 30. Fixed a bug in callout caching. If a RCPT command caused the sender address
3375 to be verified with callout=postmaster, and the main callout worked but the
3376 postmaster check failed, the verification correctly failed. However, if a
3377 subsequent RCPT command asked for sender verification *without* the
3378 postmaster check, incorrect caching caused this verification also to fail,
3381 31. Exim caches DNS lookup failures so as to avoid multiple timeouts; however,
3382 it was not caching the DNS options (qualify_single, search_parents) that
3383 were used when the lookup failed. A subsequent lookup with different
3384 options therefore always gave the same answer, though there were cases
3385 where it should not have. (Example: a "domains = !$mx_any" option on a
3386 dnslookup router: the "domains" option is always processed without any
3387 widening, but the router might have qualify_single set.) Now Exim uses the
3388 cached value only when the same options are set.
3390 32. Added John Jetmore's "exipick" utility to the distribution.
3392 33. GnuTLS: When an attempt to start a TLS session fails for any reason other
3393 than a timeout (e.g. a certificate is required, and is not provided), an
3394 Exim server now closes the connection immediately. Previously it waited for
3395 the client to close - but if the client is SSL, it seems that they each
3396 wait for each other, leading to a delay before one of them times out.
3398 34: GnuTLS: Updated the code to use the new GnuTLS 1.0.0 API. I have not
3399 maintained 0.8.x compatibility because I don't think many are using it, and
3400 it is clearly obsolete.
3402 35. Added TLS support for CRLs: a tls_crl global option and one for the smtp
3405 36. OpenSSL: $tls_certificate_verified was being set to 1 even if the
3406 client certificate was expired. A simple patch fixes this, though I don't
3407 understand the full logic of why the verify callback is called multiple
3410 37. OpenSSL: a patch from Robert Roselius: "Enable client-bug workaround.
3411 Versions of OpenSSL as of 0.9.6d include a 'CBC countermeasure' feature,
3412 which causes problems with some clients (such as the Certicom SSL Plus
3413 library used by Eudora). This option, SSL_OP_DONT_INSERT_EMPTY_FRAGMENTS,
3414 disables the coutermeasure allowing Eudora to connect."
3416 38. Exim was not checking that a write() to a log file succeeded. This could
3417 lead to Bad Things if a log got too big, in particular if it hit a file
3418 size limit. Exim now panics and dies if it cannot write to a log file, just
3419 as it does if it cannot open a log file.
3421 39. Modified OS/Makefile-Linux so that it now contains
3423 CFLAGS=-O -D_FILE_OFFSET_BITS=64 -D_LARGEFILE_SOURCE
3425 The two -D definitions ensure that Exim is compiled with large file
3426 support, which makes it possible to handle log files that are bigger than
3429 40. Fixed a subtle caching bug: if (in an ACL or a set of routers, for
3430 instance) a domain was checked against a named list that involved a lookup,
3431 causing $domain_data to be set, then another domain was checked against the
3432 same list, then the first domain was re-checked, the value of $domain_data
3433 after the final check could be wrong. In particular, if the second check
3434 failed, it could be set empty. This bug probably also applied to
3437 41. The strip_trailing_dot option was not being applied to the address given
3438 with the -f command-line option.
3440 42. The code for reading a message's header from the spool was incrementing
3441 $received_count, but never initializing it. This meant that the value was
3442 incorrect (doubled) while delivering a message in the same process in which
3443 it was received. In the most common configuration of Exim, this never
3444 happens - a fresh exec is done - but it can happen when
3445 deliver_drop_privilege is set.
3447 43. When Exim logs an SMTP synchronization error - client data sent too soon -
3448 it now includes up to 150 characters of the unexpected data in the log
3451 44. The exim_dbmbuild utility uses fixed size buffers for reading input lines
3452 and building data strings. The size of both of these buffers was 10 000
3453 bytes - far larger than anybody would *ever* want, thought I. Needless to
3454 say, somebody hit the limit. I have increased the maximum line length to
3455 20 000 and the maximum data length of concatenated lines to 100 000. I have
3456 also fixed two bugs, because there was no checking on these buffers. Tsk,
3457 tsk. Now exim_dbmbuild gives a message and exits with an error code if a
3458 buffer is too small.
3460 45. The exim_dbmbuild utility did not support quoted keys, as Exim does in
3461 lsearch lookups. Now it does.
3463 46. When parsing a route_list item in a manualroute router, a fixed-length
3464 buffer was used for the list of hosts. I made this 1024 bytes long,
3465 thinking that nobody would ever have a list of hosts that long. Wrong.
3466 Somebody had a whole pile of complicated expansion conditions, and the
3467 string was silently truncated, leading to an expansion error. It turns out
3468 that it is easier to change to an unlimited length (owing to other changes
3469 that have happened since this code was originally written) than to build
3470 structure for giving a limitation error. The length of the item that
3471 expands into the list of hosts is now unlimited.
3473 47. The lsearch lookup could not handle data where the length of text line was
3474 more than 4095 characters. Such lines were truncated, leading to shortened
3475 data being returned. It should now handle lines of any length.
3477 48. Minor wording revision: "cannot test xxx in yyy ACL" becomes "cannot test
3478 xxx condition in yyy ACL" (e.g. "cannot test domains condition in DATA
3481 49. Cosmetic tidy to scripts like exicyclog that are generated by globally
3482 replacing strings such as BIN_DIRECTORY in a source file: the replacement
3483 no longer happens in comment lines. A list of replacements is now placed
3484 at the head of all of the source files, except those whose only change is
3485 to replace PERL_COMMAND in the very first #! line.
3487 50. Replaced the slow insertion sort in queue.c, for sorting the list of
3488 messages on the queue, with a bottom-up merge sort, using code contributed
3489 by Michael Haardt. This should make operations like -bp somewhat faster on
3490 large queues. It won't affect queue runners, except when queue_run_in_order
3493 51. Installed eximstats 1.31 in the distribution.
3495 52. Added support for SRV lookups to the dnslookup router.
3497 53. If an ACL referred to $message_body or $message_body_end, the value was not
3498 reset for any messages that followed in the same SMTP session.
3500 54. The store-handling optimization for building very long strings was not
3501 differentiating between the different store pools. I don't think this
3502 actually made any difference in practice, but I've tidied it.
3504 55. While running the routers to verify a sender address, $sender_address
3505 was still set to the sender address. This is wrong, because when routing to
3506 send a bounce to the sender, it would be empty. Therefore, I have changed
3507 it so that, while verifying a sender address, $sender_address is set to <>.
3508 (There is no change to what happens when verifying a recipient address.)
3510 56. After finding MX (or SRV) records, Exim was doing a DNS lookup for the
3511 target A or AAAA records (if not already returned) without resetting the
3512 qualify_single or search_parents options of the DNS resolver. These are
3513 inappropriate in this case because the targets of MX and SRV records must
3514 be FQDNs. A broken DNS record could cause trouble if it happened to have a
3515 target that, when qualified, matched something in the local domain. These
3516 two options are now turned off when doing these lookups.
3518 57. It seems that at least some releases of Reiserfs (which does not have the
3519 concept of a fixed number of inodes) returns zero and not -1 for the
3520 number of available inodes. This interacted badly with check_spool_inodes,
3521 which assumed that -1 was the "no such thing" setting. What I have done is
3522 to check that the total number of inodes is greater than zero before doing
3523 the test of how many are available.
3525 58. When a "warn" ACL statement has a log_message modifier, the message is
3526 remembered, and not repeated. This is to avoid a lot of repetition when a
3527 message has many recipients that cause the same warning to be written.
3528 Howewer, Exim was preserving the list of already written lines for an
3529 entire SMTP session, which doesn't seem right. The memory is now reset if a
3530 new message is started.
3532 59. The "rewrite" debugging flag was not showing the result of rewriting in the
3533 debugging output unless log_rewrite was also set.
3535 60. Avoid a compiler warning on 64-bit systems in dsearch.c by avoiding the use
3536 of (int)(handle) when we know that handle contains (void *)(-1).
3538 61. The Exim daemon panic-logs an error return when it closes the incoming
3539 connection. However "connection reset by peer" seems to be common, and
3540 isn't really an error worthy of noting specially, so that particular error
3543 62. When Exim is trying to find all the local interfaces, it used to panic and
3544 die if the ioctl to get the interface flags failed. However, it seems that
3545 on at least one OS (Solaris 9) it is possible to have an interface that is
3546 included in the list of interfaces, but for which you get a failure error
3547 for this call. This happens when the interface is not "plumbed" into a
3548 protocol (i.e. neither IPv4 nor IPv6). I've changed the code so that a
3549 failure of the "get flags" call assumes that the interface is down.
3551 63. Added a ${eval10: operator, which assumes all numbers are decimal. This
3552 makes life easier for people who are doing arithmetic on fields extracted
3553 from dates, where you often get leading zeros that should not be
3554 interpreted as octal.
3556 64. Added qualify_domain to the redirect router, to override the global
3559 65. If a pathologically long header line contained very many addresses (the
3560 report of this problem mentioned 10 000) and each of them was rewritten,
3561 Exim could use up a very large amount of memory. (It kept on making new
3562 copies of the header line as it rewrote, and never released the old ones.)
3563 At the expense of a bit more processing, the header rewriting function has
3564 been changed so that it no longer eats memory in this way.
3566 66. The generation of the Received: header has been moved from the time that a
3567 message starts to be received, to the time that it finishes. The timestamp
3568 in the Received: header should now be very close to that of the <= log
3569 line. There are two side-effects of this change:
3571 (a) If a message is rejected by a DATA or non-SMTP ACL or local_scan(), the
3572 logged header lines no longer include the local Received: line, because
3573 it has not yet been created. The same applies to a copy of the message
3574 that is returned to a non-SMTP sender when a message is rejected.
3576 (b) When a filter file is tested using -bf, no additional Received: header
3577 is added to the test message. After some thought, I decided that this
3580 This change does not affect the value of $received_for. It is still set
3581 after address rewriting, but before local_scan() is called.
3583 67. Installed the latest Cygwin-specific files from the Cygwin maintainer.
3585 68. GnuTLS: If an empty file is specified for tls_verify_certificates, GnuTLS
3586 gave an unhelpful panic error message, and a defer error. I have managed to
3587 change this behaviour so that it now rejects any supplied certificate,
3588 which seems right, as the list of acceptable certificates is empty.
3590 69. OpenSSL: If an empty file is specified for tls_verify_certificates, OpenSSL
3591 gave an unhelpful defer error. I have not managed to make this reject any
3592 supplied certificates, but the error message it gives is "no certificate
3593 supplied", which is not helpful.
3595 70. exigrep's output now also includes lines that are not associated with any
3596 message, but which match the given pattern. Implemented by a patch from
3597 Martin Sluka, which also tidied up the Perl a bit.
3599 71. Recipient callout verification, like sender verification, was using <> in
3600 the MAIL FROM command. This isn't really the right thing, since the actual
3601 sender may affect whether the remote host accepts the recipient or not. I
3602 have changed it to use the actual sender in the callout; this means that
3603 the cache record is now keyed on a recipient/sender pair, not just the
3604 recipient address. There doesn't seem to be a real danger of callout loops,
3605 since a callout by the remote host to check the sender would use <>.
3606 [SEE ABOVE: changed after hitting problems.]
3608 72. Exim treats illegal SMTP error codes that do not begin with 4 or 5 as
3609 temporary errors. However, in the case of such a code being given after
3610 the end of a data transmission (i.e. after ".") Exim was failing to write
3611 a retry record for the message. (Yes, there was some broken host that was
3612 actually sending 8xx at this point.)
3614 73. An unknown lookup type in a host list could cause Exim to panic-die when
3615 the list was checked. (An example that provoked this was putting <; in the
3616 middle of a list instead of at the start.) If this happened during a DATA
3617 ACL check, a -D file could be left lying around. This kind of configuration
3618 error no longer causes Exim to die; instead it causes a defer errror. The
3619 incident is still logged to the main and panic logs.
3621 74. Buglet left over from Exim 3 conversion. The message "too many messages
3622 in one connection" was written to the rejectlog but not the mainlog, except
3623 when address rewriting (yes!) was being logged.
3625 75. Added write_rejectlog option.
3627 76. When a system filter was run not as root (that is, when system_filter_user
3628 was set), the values of the $n variables were not being returned to the
3629 main process; thus, they were not subsequently available in the $sn
3632 77. Added +return_path_on_delivery log selector.
3634 78. A connection timeout was being treated differently from recipients deferred
3635 when testing hosts_max_try with a message that was older than the host's
3636 retry timeout. (The host should not be counted, thus allowing all hosts to
3637 be tried at least once before bouncing.) This may have been the cause of an
3638 occasionally reported bug whereby a message would remain on the queue
3639 longer than the retry timeout, but would be bounced if a delivery was
3640 forced. I say "may" because I never totally pinned down the problem;
3641 setting up timeout/retry tests is difficult. See also the next item.
3643 79. The ultimate address timeout was not being applied to errors that involved
3644 a combination of host plus message (for example, a timeout on a MAIL
3645 command). When an address resolved to a number of possible hosts, and they
3646 were not all tried for each delivery (e.g. because of hosts_max_try), a
3647 message could remain on the queue longer than the retry timeout.
3649 80. Sieve bug: "stop" inside "elsif" was broken. Applied a patch from Michael
3652 81. Fixed an obscure SMTP outgoing bug which required at least the following
3653 conditions: (a) there was another message waiting for the same server;
3654 (b) the server returned 5xx to all RCPT commands in the first message so
3655 that the message was not completed; (c) the server dropped the connection
3656 or gave a negative response to the RSET that Exim sends to abort the
3657 transaction. The observed case was a dropped connection after DATA that had
3658 been sent in pipelining mode. That is, the server had advertised PIPELINING
3659 but was not implementing it correctly. The effect of the bug was incorrect
3660 behaviour, such as trying another host, and this could lead to a crash.
3666 1. The 3rd arguments to getsockname(), getpeername(), and accept() in exim.c
3667 and daemon.c were passed as pointers to ints; they should have been
3668 pointers to socklen_t variables (which are typically unsigned ints).
3670 2. Some signed/unsigned type warnings in the os.c file for Linux have been
3673 3. Fixed a really odd bug that affected only the testing scheme; patching a
3674 certain fixed string in the binary changed the value of another string that
3675 happened to be identical to the end of the original first string.
3677 4. When gethostbyname() (or equivalent) is passed an IP address as a "host
3678 name", it returns that address as the IP address. On some operating
3679 systems (e.g. Solaris), it also passes back the IP address string as the
3680 "host name". However, on others (e.g. Linux), it passes back an empty
3681 string. Exim wasn't checking for this, and was changing the host name to an
3682 empty string, assuming it had been canonicized.
3684 5. Although rare, it is permitted to have more than one PTR record for a given
3685 IP address. I thought that gethostbyaddr() or getipnodebyaddr() always gave
3686 all the names associated with an address, because they do in Solaris.
3687 However, it seems that they do not in Linux for data that comes from the
3688 DNS. If an address in /etc/hosts has multiple names, they _are_ all given.
3689 I found this out when I moved to a new Linux workstation and tried to run
3690 the Exim test suite.
3692 To get round this problem I have changed the code so that it now does its
3693 own call to the DNS to look up PTR records when searching for a host name.
3694 If nothing can be found in the DNS, it tries gethostbyaddr(), so that
3695 addresses that are only in /etc/hosts are still found.
3697 This behaviour is, however, controlled by an option called host_lookup_
3698 order, which defaults to "bydns:byaddr". If people want to use the other
3699 order, or indeed, just use one or the other means of lookup, they can
3700 specify it in this variable.
3702 6. If a PTR record yields an empty name, Exim treats it as non-existent. In
3703 some operating systems, this comes back from gethostbyaddr() as an empty
3704 string, and this is what Exim used to test for. However, it seems that in
3705 other systems, "." is yielded. Exim now tests for this case too.
3707 7. The values of check_spool_space and check_log_space are now held internally
3708 as a number of kilobytes instead of an absolute number of bytes. If a
3709 numbers is specified without 'K' or 'M', it is rounded up to the nearest
3710 kilobyte. This means that much larger values can be stored.
3712 8. Exim monitor: an attempt to get the action menu when not actually pointing
3713 at a message produces an empty menu entitled "No message selected". This
3714 works on Solaris (OpenWindows). However, XFree86 does not like a menu with
3715 no entries in it ("Shell widget menu has zero width and/or height"). So I
3716 have added a single, blank menu entry in this case.
3718 9. Added ${quote_local_part.
3720 10. MIME decoding is now applied to the contents of Subject: header lines when
3723 11. Now that a reference to $sender_host_address automatically causes a reverse
3724 lookup to occur if necessary (4.13/18), there is no need to arrange for a
3725 host lookup before query-style lookups in lists that might use this
3726 variable. This has therefore been abolished, and the "net-" prefix is no
3727 longer necessary for query-style lookups.
3729 12. The Makefile for SCO_SV contained a setting of LDFLAGS. This appears to
3730 have been a typo for LFLAGS, so it has been changed.
3732 13. The install script calls Exim with "-C /dev/null" in order to find the
3733 version number. If ALT_CONFIG_PREFIX was set, this caused an error message
3734 to be output. Howeve, since Exim outputs its version number before the
3735 error, it didn't break the script. It just looked ugly. I fixed this by
3736 always allowing "-C /dev/null" if the caller is root.
3738 14. Ignore overlarge ACL variable number when reading spool file - insurance
3739 against a later release with more variables having written the file.
3741 15. The standard form for an IPv6 address literal was being rejected by EHLO.
3742 Example: [IPv6:2002:c1ed:8229:10:202:2dff:fe07:a42a]. Exim now accepts
3743 this, as well as the form without the "IPv6" on the front.
3745 16. Added CHOWN_COMMAND=/usr/sbin/chown and LIBS=-lresolv to the
3746 OS/Makefile-Darwin file.
3748 17. Fixed typo in lookups/ldap.c: D_LOOKUP should be D_lookup. This applied
3749 only to LDAP libraries that do not have LDAP_OPT_DEREF.
3751 18. After change 4.21/52, "%ld" was used to format the contents of the $inode
3752 variable. However, some OS use ints for inodes. I've added cast to long int
3753 to get rid of the compiler warning.
3755 19. I had forgotten to lock out "/../" in configuration file names when
3756 ALT_CONFIG_PREFIX was set.
3758 20. Routers used for verification do not need to specify transports. However,
3759 if such a router generated a host list, and callout was configured, Exim
3760 crashed, because it could not find a port number from the (non-existent)
3761 transport. It now assumes port 25 in this circumstance.
3763 21. Added the -t option to exigrep.
3765 22. If LOOKUP_LSEARCH is defined, all three linear search methods (lsearch,
3766 wildlsearch, nwildlsearch) are compiled. LOOKUP_WILDLSEARCH and LOOKUP_
3767 NWILDLSEARCH are now obsolete, but retained for compatibility. If either of
3768 them is set, LOOKUP_LSEARCH is forced.
3770 23. "exim -bV" now outputs a list of lookups that are included in the binary.
3772 24. Added sender and host information to the "rejected by local_scan()" log
3773 line; previously there was no indication of these.
3775 25. Added .include_if_exists.
3777 26. Change 3.952/11 added an explicit directory sync on top of a file sync for
3778 Linux. It turns out that not all file systems support this. Apparently some
3779 versions of NFS do not. (It's rare to put Exim's spool on NFS, but people
3780 do it.) To cope with this, the error EINVAL, which means that sync-ing is
3781 not supported on the file descriptor, is now ignored when Exim is trying to
3782 sync a directory. This applies only to Linux.
3784 27. Added -DBIND_8_COMPAT to the CLFAGS setting for Darwin.
3786 28. In Darwin (MacOS X), the PAM headers are in /usr/include/pam and not in
3787 /usr/include/security. There's now a flag in OS/os.h-Darwin to cope with
3790 29. Added support for maildirsize files from supplied patch (modified a bit).
3792 30. The use of :fail: followed by an empty string could lead Exim to respond to
3793 sender verification failures with (e.g.):
3795 550 Verification failed for <xxx>
3796 550 Sender verify failed
3798 where the first response line was missing the '-' that indicates it is not
3799 the final line of the response.
3801 31. The loop for finding the name of the user that called Exim had a hardwired
3802 limit of 10; it now uses the value of finduser_retries, which is used for
3803 all other user lookups.
3805 32. Added $received_count variable, available in data and not_smtp ACLs, and at
3808 33. Exim was neglecting to zero errno before one call of strtol() when
3809 expanding a string and expecting an integer value. On some systems this
3810 resulted in spurious "integer overflow" errors. Also, it was casting the
3811 result into an int without checking.
3813 34. Testing for a connection timeout using "timeout_connect" in the retry rules
3814 did not work. The code looks as if it has *never* worked, though it appears
3815 to have been documented since at least releast 1.62. I have made it work.
3817 35. The "timeout_DNS" error in retry rules, also documented since at least
3818 1.62, also never worked. As it isn't clear exactly what this means, and
3819 clearly it isn't a major issue, I have abolished the feature by treating it
3820 as "timeout", and writing a warning to the main and panic logs.
3822 36. The display of retry rules for -brt wasn't always showing the error code
3825 37. Added new error conditions to retry rules: timeout_A, timeout_MX,
3826 timeout_connect_A, timeout_connect_MX.
3828 38. Rewriting the envelope sender at SMTP time did not allow it to be rewritten
3829 to the empty sender.
3831 39. The daemon was not analysing the content of -oX till after it had closed
3832 stderr and disconnected from the controlling terminal. This meant that any
3833 syntax errors were only noted on the panic log, and the return code from
3834 the command was 0. By re-arranging the code a little, I've made the
3835 decoding happen first, so such errors now appear on stderr, and the return
3836 code is 1. However, the actual setting up of the sockets still happens in
3837 the disconnected process, so errors there are still only recorded on the
3840 40. A daemon listener on a wildcard IPv6 socket that also accepts IPv4
3841 connections (as happens on some IP stacks) was logged at start up time as
3842 just listening for IPv6. It now logs "IPv6 with IPv4". This differentiates
3843 it from "IPv6 and IPv4", which means that two separate sockets are being
3846 41. The debug output for gethostbyname2() or getipnodebyname() failures now
3847 says whether AF_INET or AF_INET6 was passed as an argument.
3849 42. Exiwhat output was messed up when time zones were included in log
3852 43. Exiwhat now gives more information about the daemon's listening ports,
3853 and whether -tls-on-connect was used.
3855 44. The "port" option of the smtp transport is now expanded.
3857 45. A "message" modifier in a "warn" statement in a non-message ACL was being
3858 silently ignored. Now an error message is written to the main and panic
3861 46. There's a new ACL modifier called "logwrite" which writes to a log file
3862 as soon as it is encountered.
3864 47. Added $local_user_uid and $local_user_gid at routing time.
3866 48. Exim crashed when trying to verify a sender address that was being
3869 49. Exim was recognizing only a space character after ".include". It now also
3870 recognizes a tab character.
3872 50. Fixed several bugs in the Perl script that creates the exim.8 man page by
3873 extracting the relevant information from the specification. The man page no
3874 longer contains scrambled data for the -d option, and I've added a section
3875 at the front about calling Exim under different names.
3877 51. Added "extra_headers" argument to the "mail" command in filter files.
3879 52. Redirecting mail to an unqualified address in a Sieve filter caused Exim to
3882 53. Installed eximstats 1.29.
3884 54. Added transport_filter_timeout as a generic transport option.
3886 55. Exim no longer adds an empty Bcc: header to messages that have no To: or
3887 Cc: header lines. This was required by RFC 822, but it not required by RFC
3890 56. Exim used to add From:, Date:, and Message-Id: header lines to any
3891 incoming messages that did not have them. Now it does so only if the
3892 message originates locally, that is, if there is no associated remote host
3893 address. When Resent- header lines are present, this applies to the Resent-
3894 lines rather than the non-Resent- lines.
3896 57. Drop incoming SMTP connection after too many syntax or protocol errors. The
3897 limit is controlled by smtp_max_synprot_errors, defaulting to 3.
3899 58. Messages for configuration errors now include the name of the main
3900 configuration file - useful now that there may be more than one file in a
3901 list (.included file names were always shown).
3903 59. Change 4.21/82 (run initgroups() when starting the daemon) causes problems
3904 for those rare installations that do not start the daemon as root or run it
3905 setuid root. I've cut out the call to initgroups() if the daemon is not
3908 60. The Exim user and group can now be bound into the binary as text strings
3909 that are looked up at the start of Exim's processing.
3911 61. Applied a small patch for the Interbase code, supplied by Ard Biesheuvel.
3913 62. Added $mailstore_basename variable.
3915 63. Installed patch to sieve.c from Michael Haardt.
3917 64. When Exim failed to open the panic log after failing to open the main log,
3918 the original message it was trying to log was written to stderr and debug
3919 output, but if they were not available (the usual case in production), it
3920 was lost. Now it is written to syslog before the two lines that record the
3921 failures to open the logs.
3923 65. Users' Exim filters run in subprocesses under the user's uid. It is
3924 possible for a "deliver" command or an alias in a "personal" command to
3925 provoke an address rewrite. If logging of address rewriting is configured,
3926 this fails because the process is not running as root or exim. There may be
3927 a better way of dealing with this, but for the moment (because 4.30 needs
3928 to be released), I have disabled address rewrite logging when running a
3929 filter in a non-root, non-exim process.
3935 1. The buildconfig auxiliary program wasn't quoting the value set for
3936 HEADERS_CHARSET. This caused a compilation error complaining that 'ISO' was
3937 not defined. This bug was masked in 4.22 by the effect that was fixed in
3940 2. Some messages that were rejected after a message id was allocated were
3941 shown as "incomplete" by exigrep. It no longer does this for messages that
3942 are rejected by local_scan() or the DATA or non-SMTP ACLs.
3944 3. If a Message-ID: header used a domain literal in the ID, and Exim did not
3945 have allow_domain_literals set, the ID did not get logged in the <= line.
3946 Domain literals are now always recognized in Message-ID: header lines.
3948 4. The first argument for a ${extract expansion item is the key name or field
3949 number. Leading and trailing spaces in this item were not being ignored,
3950 causing some misleading effects.
3952 5. When deliver_drop_privilege was set, single queue runner processes started
3953 manually (i.e. by the command "exim -q") or by the daemon (which uses the
3954 same command in the process it spins off) were not dropping privilege.
3956 6. When the daemon running as "exim" started a queue runner, it always
3957 re-executed Exim in the spun-off process. This is a waste of effort when
3958 deliver_drop_privilege is set. The new process now just calls the
3959 queue-runner function directly.
3965 1. Typo in the src/EDITME file: it referred to HEADERS_DECODE_TO instead of
3968 2. Change 4.21/73 introduced a bug. The pid file path set by -oP was being
3969 ignored. Though the use of -oP was forcing the writing of a pid file, it
3970 was always written to the default place.
3972 3. If the message "no IP address found for host xxxx" is generated during
3973 incoming verification, it is now followed by identification of the incoming
3974 connection (so you can more easily find what provoked it).
3976 4. Bug fix for Sieve filters: "stop" inside a block was not working properly.
3978 5. Added some features to "harden" Exim a bit more against certain attacks:
3980 (a) There is now a build-time option called FIXED_NEVER_USERS that can
3981 be put in Local/Makefile. This is like the never_users runtime option,
3982 but it cannot be overridden. The default setting is "root".
3984 (b) If ALT_CONFIG_PREFIX is defined in Local/Makefile, it specifies a
3985 prefix string with which any file named in a -C command line option
3988 (c) If ALT_CONFIG_ROOT_ONLY is defined in Local/Makefile, root privilege
3989 is retained for -C and -D only if the caller of Exim is root. Without
3990 it, the exim user may also use -C and -D and retain privilege.
3992 (d) If DISABLE_D_OPTION is defined in Local/Makefile, the use of the -D
3993 command line option is disabled.
3995 6. Macro names set by the -D option must start with an upper case letter, just
3996 like macro names defined in the configuration file.
3998 7. Added "dereference=" facility to LDAP.
4000 8. Two instances of the typo "uknown" in the source files are fixed.
4002 9. If a PERL_COMMAND setting in Local/Makefile was not at the start of a line,
4003 the Configure-Makefile script screwed up while processing it.
4005 10. Incorporated PCRE 4.4.
4007 11. The SMTP synchronization check was not operating right at the start of an
4008 SMTP session. For example, it could not catch a HELO sent before the client
4009 waited for the greeting. There is now a check for outstanding input at the
4010 point when the greeting is written. Because of the duplex, asynchronous
4011 nature of TCP/IP, it cannot be perfect - the incorrect input may be on its
4012 way, but not yet received, when the check is performed.
4014 12. Added tcp_nodelay to make it possible to turn of the setting of TCP_NODELAY
4015 on TCP/IP sockets, because this apparently causes some broken clients to
4018 13. Installed revised OS/Makefile-CYGWIN and OS/os.c-cygwin (the .h file was
4019 unchanged) from the Cygwin maintainer.
4021 14. The code for -bV that shows what is in the binary showed "mbx" when maildir
4022 was supported instead of testing for mbx. Effectively a typo.
4024 15. The spa authenticator server code was not checking that the input it
4025 received was valid base64.
4027 16. The debug output line for the "set" modifier in ACLs was not showing the
4028 name of the variable that was being set.
4030 17. Code tidy: the variable type "vtype_string" was never used. Removed it.
4032 18. Previously, a reference to $sender_host_name did not cause a DNS reverse
4033 lookup on its own. Something else was needed to trigger the lookup. For
4034 example, a match in host_lookup or the need for a host name in a host list.
4035 Now, if $sender_host_name is referenced and the host name has not yet been
4036 looked up, a lookup is performed. If the lookup fails, the variable remains
4037 empty, and $host_lookup_failed is set to "1".
4039 19. Added "eqi" as a case-independent comparison operator.
4041 20. The saslauthd authentication condition could segfault if neither service
4042 nor realm was specified.
4044 21. If an overflowing value such as "2048M" was set for message_size_limit, the
4045 error message that was logged was misleading, and incoming SMTP
4046 connections were dropped. The message is now more accurate, and temporary
4047 errors are given to SMTP connections.
4049 22. In some error situations (such as 21 above) Exim rejects all SMTP commands
4050 (except RSET) with a 421 error, until QUIT is received. However, it was
4051 failing to send a response to QUIT.
4053 23. The HELO ACL was being run before the code for helo_try_verify_hosts,
4054 which made it impossible to use "verify = helo" in the HELO ACL. The HELO
4055 ACL is now run after the helo_try_verify_hosts code.
4057 24. "{MD5}" and "{SHA1}" are now recognized as equivalent to "{md5"} and
4058 "{sha1}" in the "crypteq" expansion condition (in fact the comparison is
4059 case-independent, so other case variants are also recognized). Apparently
4060 some systems use these upper case variants.
4062 25. If more than two messages were waiting for the same host, and a transport
4063 filter was specified for the transport, Exim sent two messages over the
4064 same TCP/IP connection, and then failed with "socket operation on non-
4065 socket" when it tried to send the third.
4067 26. Added Exim::debug_write and Exim::log_write for embedded Perl use.
4069 27. The extern definition of crypt16() in expand.c was not being excluded when
4070 the OS had its own crypt16() function.
4072 28. Added bounce_return_body as a new option, and bounce_return_size_limit
4073 as a preferred synonym for return_size_limit, both as an option and as an
4076 29. Added LIBS=-liconv to OS/Makefile-OSF1.
4078 30. Changed the default configuration ACL to relax the local part checking rule
4079 for addresses that are not in any local domains. For these addresses,
4080 slashes and pipe symbols are allowed within local parts, but the sequence
4081 /../ is explicitly forbidden.
4083 31. SPA server authentication was not clearing the challenge buffer before
4086 32. log_message in a "warn" ACL statement was writing to the reject log as
4087 well as to the main log, which contradicts the documentation and doesn't
4088 seem right (because no rejection is happening). So I have stopped it.
4090 33. Added Ard Biesheuvel's lookup code for accessing an Interbase database.
4091 However, I am unable to do any testing of this.
4093 34. Fixed an infelicity in the appendfile transport. When checking directories
4094 for a mailbox, to see if any needed to be created, it was accidentally
4095 using path names with one or more superfluous leading slashes; tracing
4096 would show up entries such as stat("///home/ph10", 0xFFBEEA48).
4098 35. If log_message is set on a "discard" verb in a MAIL or RCPT ACL, its
4099 contents are added to the log line that is written for every discarded
4100 recipient. (Previously a log_message setting was ignored.)
4102 36. The ${quote: operator now quotes the string if it is empty.
4104 37. The install script runs exim in order to find its version number. If for
4105 some reason other than non-existence or emptiness, which it checks, it
4106 could not run './exim', it was installing it with an empty version number,
4107 i.e. as "exim-". This error state is now caught, and the installation is
4110 38. An argument was missing from the function that creates an error message
4111 when Exim fails to connect to the socket for saslauthd authentication.
4112 This could cause Exim to crash, or give a corrupted message.
4114 39. Added isip, isip4, and isip6 to ${if conditions.
4116 40. The ACL variables $acl_xx are now saved with the message, and can be
4117 accessed later in routers, transports, and filters.
4119 41. The new lookup type nwildlsearch is like wildlsearch, except that the key
4120 strings in the file are not string-expanded.
4122 42. If a MAIL command specified a SIZE value that was too large to fit into an
4123 int variable, the check against message_size_limit failed. Such values are
4124 now forced to INT_MAX, which is around 2Gb for a 32-bit variable. Maybe one
4125 day this will have to be increased, but I don't think I want to be around
4126 when emails are that large.
4133 1. Removed HAVE_ICONV=yes from OS/Makefile-FreeBSD, since it seems that
4134 iconv() is not standard in FreeBSD.
4136 2. Change 4.21/17 was buggy and could cause stack overwriting on a system with
4137 IPv6 enabled. The observed symptom was a segmentation fault on return from
4138 the function os_common_find_running_interfaces() in src/os.c.
4140 3. In the check_special_case() function in daemon.c I had used "errno" as an
4141 argument name, which causes warnings on some systems. This was basically a
4142 typo, since it was named "eno" in the comments!
4144 4. The code that waits for the clock to tick (at a resolution of some fraction
4145 of a second) so as to ensure message-id uniqueness was always waiting for
4146 at least one whole tick, when it could have waited for less. [This is
4147 almost certainly not relevant at current processor speeds, where it is
4148 unlikely to ever wait at all. But we try to future-proof.]
4150 5. The function that sleeps for a time interval that includes fractions of a
4151 second contained a race. It did not block SIGALRM between setting the
4152 timer, and suspending (a couple of lines later). If the interval was short
4153 and the sigsuspend() was delayed until after it had expired, the suspension
4154 never ended. On busy systems this could lead to processes getting stuck for
4157 6. Some uncommon configurations may cause a lookup to happen in a queue runner
4158 process, before it forks any delivery processes. The open lookup caching
4159 mechanism meant that the open file or database connection was passed into
4160 the delivery process. The problem was that delivery processes always tidy
4161 up cached lookup data. This could cause a problem for the next delivery
4162 process started by the queue runner, because the external queue runner
4163 process does not know about the closure. So the next delivery process
4164 still has data in the lookup cache. In the case of a file lookup, there was
4165 no problem because closing a file descriptor in a subprocess doesn't affect
4166 the parent. However, if the lookup was caching a connection to a database,
4167 the connection was closed, and the second delivery process was likely to
4168 see errors such as "PGSQL: query failed: server closed the connection
4169 unexpectedly". The problem has been fixed by closing all cached lookups
4170 in a queue runner before running a delivery process.
4172 7. Compiler warning on Linux for the second argument of iconv(), which doesn't
4173 seem to have the "const" qualifier which it has on other OS. I've
4176 8. Change 4.21/2 was too strict. It is only if there are two authenticators
4177 *of the same type* (client or server) with the same public name that an
4178 error should be diagnosed.
4180 9. When Exim looked up a host name for an IP address, but failed to find the
4181 original IP address when looking up the host name (a safety check), it
4182 output the message "<ip address> does not match any IP for NULL", which was
4183 confusing, to say the least. The bug was that the host name should have
4184 appeared instead of "NULL".
4186 10. Since release 3.03, if Exim is called by a uid other than root or the Exim
4187 user that is built into the binary, and the -C or -D options is used, root
4188 privilege is dropped before the configuration file is read. In addition,
4189 logging is switched to stderr instead of the normal log files. If the
4190 configuration then re-defines the Exim user, the unprivileged environment
4191 is probably not what is expected, so Exim logs a panic warning message (but
4194 However, if deliver_drop_privilege is set, the unprivileged state may well
4195 be exactly what is intended, so the warning has been cut out in that case,
4196 and Exim is allowed to try to write to its normal log files.
4202 1. smtp_return_error_details was not giving details for temporary sender
4203 or receiver verification errors.
4205 2. Diagnose a configuration error if two authenticators have the same public
4208 3. Exim used not to create the message log file for a message until the first
4209 delivery attempt. This could be confusing when incoming messages were held
4210 for policy or load reasons. The message log file is now created at the time
4211 the message is received, and an initial "Received" line is written to it.
4213 4. The automatically generated man page for command line options had a minor
4214 bug that caused no ill effects; however, a more serious problem was that
4215 the procedure for building the man page automatically didn't always
4216 operate. Consequently, release 4.20 contains an out-of-date version. This
4217 shouldn't happen again.
4219 5. When building Exim with embedded Perl support, the script that builds the
4220 Makefile was calling 'perl' to find its compile-time parameters, ignoring
4221 any setting of PERL_COMMAND in Local/Makefile. This is now fixed.
4223 6. The freeze_tell option was not being used for messages that were frozen on
4224 arrival, either by an ACL or by local_scan().
4226 7. Added the smtp_incomplete_transaction log selector.
4228 8. After STARTTLS, Exim was not forgetting that it had advertised AUTH, so it
4229 was accepting AUTH without a new EHLO.
4231 9. Added tls_remember_esmtp to cope with YAEB. This allows AUTH and other
4232 ESMTP extensions after STARTTLS without a new EHLO, in contravention of the
4235 10. Logging of TCP/IP connections (when configured) now happens in the main
4236 daemon process instead of the child process, so that the TCP/IP connection
4237 count is more accurate (but it can never be perfect).
4239 11. The use of "drop" in a nested ACL was not being handled correctly in the
4240 outer ACL. Now, if condition failure induced by the nested "drop" causes
4241 the outer ACL verb to deny access ("accept" or "discard" after "endpass",
4242 or "require"), the connection is dropped.
4244 12. Similarly, "discard" in a nested ACL wasn't being handled. A nested ACL
4245 that yield "discard" can now be used with an "accept" or a "discard" verb,
4246 but an error is generated for any others (because I can't see a useful way
4247 to define what should happen).
4249 13. When an ACL is read dynamically from a file (or anywhere else), the lines
4250 are now processed in the same way as lines in the Exim configuration file.
4251 In particular, continuation lines are supported.
4253 14. Added the "dnslists = a.b.c!=n.n.n.n" feature.
4255 15. Added -ti meaning -t -i.
4257 16. Check for letters, digits, hyphens, and dots in the names of dnslist
4258 domains, and warn by logging if others are found.
4260 17. At least on BSD, alignment is not guarenteed for the array of ifreq's
4261 returned from GIFCONF when Exim is trying to find the list of interfaces on
4262 a host. The code in os.c has been modified to copy each ifreq to an aligned
4263 structure in all cases.
4265 Also, in some cases, the returned ifreq's were being copied to a 'struct
4266 ifreq' on the stack, which was subsequently passed to host_ntoa(). That
4267 means the last couple of bytes of an IPv6 address could be chopped if the
4268 ifreq contained only a normal sockaddr (14 bytes storage).
4270 18. Named domain lists were not supported in the hosts_treat_as_local option.
4271 An entry such as +xxxx was not recognized, and was treated as a literal
4274 19. Ensure that header lines added by a DATA ACL are included in the reject log
4275 if the ACL subsequently rejects the message.
4277 20. Upgrade the cramtest.pl utility script to use Digest::MD5 instead of just
4278 MD5 (which is deprecated).
4280 21. When testing a filter file using -bf, Exim was writing a message when it
4281 took the sender from a "From " line in the message, but it was not doing so
4282 when it took $return_path from a Return-Path: header line. It now does.
4284 22. If the contents of a "message" modifier for a "warn" ACL verb do not begin
4285 with a valid header line field name (a series of printing characters
4286 terminated by a colon, Exim now inserts X-ACL-Warn: at the beginning.
4288 23. Changed "disc" in the source to "disk" to conform to the documentation and
4289 the book and for uniformity.
4291 24. Ignore Sendmail's -Ooption=value command line item.
4293 25. When execve() failed while trying to run a command in a pipe transport,
4294 Exim was returning EX_UNAVAILBLE (69) from the subprocess. However, this
4295 could be confused with a return value of 69 from the command itself. This
4296 has been changed to 127, the value the shell returns if it is asked to run
4297 a non-existent command. The wording for the related log line suggests a
4298 non-existent command as the problem.
4300 26. If received_header_text expands to an empty string, do not add a Received:
4301 header line to the message. (Well, it adds a token one on the spool, but
4302 marks it "old" so that it doesn't get used or transmitted.)
4304 27. Installed eximstats 1.28 (addition of -nt option).
4306 28. There was no check for failure on the call to getsockname() in the daemon
4307 code. This can fail if there is a shortage of resources on the system, with
4308 ENOMEM, for example. A temporary error is now given on failure.
4310 29. Contrary to the C standard, it seems that in some environments, the
4311 equivalent of setlocale(LC_ALL, "C") is not obeyed at the start of a C
4312 program. Exim now does this explicitly; it affects the formatting of
4313 timestamps using strftime().
4315 30. If exiqsumm was given junk data, it threw up some uninitialized variable
4316 complaints. I've now initialized all the variables, to avoid this.
4318 32. Header lines added by a system filter were not being "seen" during
4319 transport-time rewrites.
4321 33. The info_callback() function passed to OpenSSL is set up with type void
4322 (*)(SSL *, int, int), as described somewhere. However, when calling the
4323 function (actually a macro) that sets it up, the type void(*)() is
4324 expected. I've put in a cast to prevent warnings from picky compilers.
4326 34. If a DNS black list lookup found a CNAME record, but there were no A
4327 records associated with the domain it pointed at, Exim crashed.
4329 35. If a DNS black list lookup returned more than one A record, Exim ignored
4330 all but the first. It now scans all returned addresses if a particular IP
4331 value is being sought. In this situation, the contents of the
4332 $dnslist_value variable are a list of all the addresses, separated by a
4335 36. Tightened up the rules for host name lookups using reverse DNS. Exim used
4336 to accept a host name and all its aliases if the forward lookup for any of
4337 them yielded the IP address of the incoming connection. Now it accepts only
4338 those names whose forward lookup yields the correct IP address. Any other
4339 names are discarded. This closes a loophole whereby a rogue DNS
4340 administrator could create reverse DNS records to break through a
4341 wildcarded host restriction in an ACL.
4343 37. If a user filter or a system filter that ran in a subprocess used any of
4344 the numerical variables ($1, $2 etc), or $thisaddress, in a pipe command,
4345 the wrong values were passed to the pipe command ($thisaddress had the
4346 value of $0, $0 had the value of $1, etc). This bug was introduced by
4347 change 4.11/101, and not discovered because I wrote an inadequate test. :-(
4349 38. Improved the line breaking for long SMTP error messages from ACLs.
4350 Previously, if there was no break point between 40 and 75 characters, Exim
4351 left the rest of the message alone. Two changes have been made: (a) I've
4352 reduced the minimum length to 35 characters; (b) if it can't find a break
4353 point between 35 and 75 characters, it looks ahead and uses the first one
4354 that it finds. This may give the occasional overlong line, but at least the
4355 remaining text gets split now.
4357 39. Change 82 of 4.11 was unimaginative. It assumed the limit on the number of
4358 file descriptors might be low, and that setting 1000 would always raise it.
4359 It turns out that in some environments, the limit is already over 1000 and
4360 that lowering it causes trouble. So now Exim takes care not to decrease it.
4362 40. When delivering a message, the value of $return_path is set to $sender_
4363 address at the start of routing (routers may change the value). By an
4364 oversight, this default was not being set up when an address was tested by
4365 -bt or -bv, which affected the outcome if any router or filter referred to
4368 41. The idea of the "warn" ACL verb is that it adds a header or writes to the
4369 log only when "message" or "log_message" are set. However, if one of the
4370 conditions was an address verification, or a call to a nested ACL, the
4371 messages generated by the underlying test were being passed through. This
4372 no longer happens. The underlying message is available in $acl_verify_
4373 message for both "message" and "log_message" expansions, so it can be
4374 passed through if needed.
4376 42. Added RFC 2047 interpretation of header lines for $h_ expansions, with a
4377 new expansion $bh_ to give the encoded byte string without charset
4378 translation. Translation happens only if iconv() is available; HAVE_ICONV
4379 indicates this at build time. HEADERS_CHARSET gives the charset to
4380 translate to; headers_charset can change it in the configuration, and
4381 "headers charset" can change it in an individual filter file.
4383 43. Now that we have a default RFC 2047 charset (see above), the code in Exim
4384 that creates RFC 2047 encoded "words" labels them as that charset instead
4385 of always using iso-8859-1. The cases are (i) the explicit ${rfc2047:
4386 expansion operator; (ii) when Exim creates a From: line for a local
4387 message; (iii) when a header line is rewritten to include a "phrase" part.
4389 44. Nasty bug in exiqsumm: the regex to skip already-delivered addresses was
4390 buggy, causing it to skip the first lines of messages whose message ID
4391 ended in 'D'. This would not have bitten before Exim release 4.14, because
4392 message IDs were unlikely to end in 'D' before then. The effect was to have
4393 incorrect size information for certain domains.
4395 45. #include "config.h" was missing at the start of the crypt16.c module. This
4396 caused trouble on Tru64 (aka OSF1) systems, because HAVE_CRYPT16 was not
4399 46. If there was a timeout during a "random" callout check, Exim treated it as
4400 a failure of the random address, and carried on sending RSET and the real
4401 address. If the delay was just some slowness somewhere, the response to the
4402 original RCPT would be taken as a response to RSET and so on, causing
4403 mayhem of various kinds.
4405 47. Change 50 for 4.20 was a heap of junk. I don't know what I was thinking
4406 when I implemented it. It didn't allow for the fact that some option values
4407 may legitimatetly be negative (e.g. size_addition), and it didn't even do
4408 the right test for positive values.
4410 48. Domain names in DNS records are case-independent. Exim always looks them up
4411 in lower case. Some resolvers return domain names in exactly the case they
4412 appear in the zone file, that is, they may contain uppercase letters. Not
4413 all resolvers do this - some return always lower case. Exim was treating a
4414 change of case by a resolver as a change of domain, similar to a widening
4415 of a domain abbreviation. This triggered its re-routing code and so it was
4416 trying to route what was effectively the same domain again. This normally
4417 caused routing to fail (because the router wouldn't handle the domain
4418 twice). Now Exim checks for this case specially, and just changes the
4419 casing of the domain that it ultimately uses when it transmits the message
4422 49. Added Sieve (RFC 3028) support, courtesy of Michael Haardt's contributed
4425 50. If a filter generated a file delivery with a non-absolute name (possible if
4426 no home directory exists for the router), the forbid_file option was not
4429 51. Added '&' feature to dnslists, to provide bit mask matching in addition to
4430 the existing equality matching.
4432 52. Exim was using ints instead of ino_t variables in some places where it was
4433 dealing with inode numbers.
4435 53. If TMPDIR is defined in Local/Makefile (default in src/EDITME is
4436 TMPDIR="/tmp"), Exim checks for the presence of an environment variable
4437 called TMPDIR, and if it finds it is different, it changes its value.
4439 54. The smtp_printf() function is now made available to local_scan() so
4440 additional output lines can be written before returning. There is also an
4441 smtp_fflush() function to enable the detection of a dropped connection.
4442 The variables smtp_input and smtp_batched_input are exported to
4445 55. Changed the default runtime configuration: the message "Unknown user"
4446 has been removed from the ACL, and instead placed on the localuser router,
4447 using the cannot_route_message feature. This means that any verification
4448 failures that generate their own messages won't get overridden. Similarly,
4449 the "Unrouteable address" message that was in the ACL for unverifiable
4450 relay addresses has also been removed.
4452 56. Added hosts_avoid_esmtp to the smtp transport.
4454 57. The exicyclog script was not checking for the esoteric option
4455 CONFIGURE_FILE_USE_EUID in the Local/Makefile. It now does this, but it
4456 will work only if exicyclog is run under the appropriate euid.
4458 58. Following a discussion on the list, the rules by which Exim recognises line
4459 endings on incoming messages have been changed. The -dropcr and drop_cr
4460 options are now no-ops, retained only for backwards compatibility. The
4461 following line terminators are recognized: LF CRLF CR. However, special
4462 processing applies to CR:
4464 (i) The sequence CR . CR does *not* terminate an incoming SMTP message,
4465 nor a local message in the state where . is a terminator.
4467 (ii) If a bare CR is encountered in a header line, an extra space is added
4468 after the line terminator so as not to end the header. The reasoning
4469 behind this is that bare CRs in header lines are most likely either
4470 to be mistakes, or people trying to play silly games.
4472 59. The size of a message, as listed by "-bp" or in the Exim monitor window,
4473 was being incorrectly given as 18 bytes larger than it should have been.
4474 This is a VOB (very old bug).
4476 60. This may never have affected anything current, but just in case it has:
4477 When the local host is found other than at the start of a list of hosts,
4478 the local host, those with the same MX, and any that follow, are discarded.
4479 When the list in question was part of a longer list of hosts, the following
4480 hosts (not currently being processed) were also being discarded. This no
4481 longer happens. I'm not sure if this situation could ever has previously
4484 61. Added the "/MX" feature to lists of hosts in the manualroute and query
4487 62. Whenever Exim generates a new message, it now adds an Auto-Submitted:
4488 header. This is something that is recommended in a new Internet Draft, and
4489 is something that is documented as being done by Sendmail. There are two
4490 possible values. For messages generated by the autoreply transport, Exim
4493 Auto-Submitted: auto-replied
4495 whereas for all other generated messages (e.g. bounces) it adds
4497 Auto-Submitted: auto-generated
4499 63. The "personal" condition in filters now includes a test for the
4500 Auto-Submitted: header. If it contains the string "auto-" the message it
4501 not considered personal.
4503 64. Added rcpt_include_affixes as a generic transport option.
4505 65. Added queue_only_override (default true).
4507 66. Added the syslog_duplication option.
4509 67. If what should have been the first header line of a message consisted of
4510 a space followed by a colon, Exim was mis-interpreting it as a header line.
4511 It isn't of course - it is syntactically invalid and should therefore be
4512 treated as the start of the message body. The misbehaviour could have
4513 caused a number of strange effects, including loss of data in subsequent
4514 header lines, and spool format errors.
4516 68. Formerly, the AUTH parameter on a MAIL command was trusted only if the
4517 client host had authenticated. This control can now be exercised by an ACL
4518 for more flexibility.
4520 69. By default, callouts do not happen when testing with -bh. There is now a
4521 variant, -bhc, which does actually run the callout code, including
4522 consulting and updating the callout cache.
4524 70. Added support for saslauthd authentication, courtesy of Alexander
4527 71. If statvfs() failed on the spool or log directories while checking their
4528 size for availability, Exim confusingly gave the error "space shortage".
4529 Furthermore, in debugging mode it crashed with a floating point exception.
4530 These checks are done if check_{spool,log}_{space,inodes} are set, and when
4531 an SMTP message arrives with SIZE= on the MAIL command. As this is a really
4532 serious problem, Exim now writes to the main and panic logs when this
4533 happens, with details of the failure. It then refuses to accept the
4534 incoming message, giving the message "spool directory problem" or "log
4535 directory problem" with a 421 code for SMTP messages.
4537 72. When Exim is about to re-exec itself, it ensures that the file descriptors
4538 0, 1, and 2 exist, because some OS complain for execs without them (see
4539 ChangeLog 4.05/30). If necessary, Exim opens /dev/null to use for these
4540 descriptors. However, the code omitted to check that the open succeeded,
4541 causing mysterious errors if for some reason the permissions on /dev/null
4542 got screwed. Now Exim writes a message to the main and panic logs, and
4543 bombs out if it can't open /dev/null.
4545 73. Re-vamped the way daemon_smtp_port, local_interfaces, and -oX work and
4546 interact so that it is all more flexible. It is supposed to remain
4547 backwards compatible. Also added extra_local_interfaces.
4549 74. Invalid data sent to a SPA (NTLM) server authenticator could cause the code
4550 to bomb out with an assertion failure - to the client this appears as a
4551 connection drop. This problem occurs in the part of the code that was taken
4552 from the Samba project. Fortunately, the assertion is in a very simple
4553 function, so I have fixed this by reproducing the function inline in the
4554 one place where it is called, and arranging for authentication to fail
4555 instead of killing the process with assert().
4557 75. The SPA client code was not working when the server requested OEM rather
4558 than Unicode encoding.
4560 76. Added code to make require_files with a specific uid setting more usable in
4561 the case where statting the file as root fails - usually a non-root-mounted
4562 NFS file system. When this happens and the failure is EACCES, Exim now
4563 forks a subprocess and does the per-uid checking as the relevant uid.
4565 77. Added process_log_path.
4567 78. If log_file_path was not explicitly set, a setting of check_log_space or
4568 check_log_inodes was ignored.
4570 79. If a space check for the spool or log partitions fails, the incident is now
4571 logged. Of course, in the latter case the data may get lost...
4573 80. Added the %p formatting code to string_format() so that it can be used to
4574 print addresses in debug_print(). Adjusted all the address printing in the
4575 debugging in store.c to use %p rather than %d.
4577 81. There was a concern that a line of code in smtp_in.c could overflow a
4578 buffer if a HELO/EHLO command was given followed by 500 or so spaces. As
4579 initially expressed, the concern was not well-founded, because trailing
4580 spaces are removed early. However, if the trailing spaces were followed by
4581 a NULL, they did not get removed, so the overflow was possible. Two fixes
4584 (a) I re-wrote the offending code in a cleaner fashion.
4585 (b) If an incoming SMTP command contains a NULL character, it is rejected
4588 82. When Exim changes uid/gid to the Exim user at daemon start time, it now
4589 runs initgroups(), so that if the Exim user is in any additional groups,
4590 they will be used during message reception.
4596 The change log for 4.20 and earlier releases has been archived.
projects / exim.git / blob