1 $Cambridge: exim/doc/doc-txt/ChangeLog,v 1.471 2007/02/06 12:19:27 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.
80 PH/18 Flush SMTP output before performing a callout, unless control =
81 no_callout_flush is set.
87 PH/01 Two more bugs that were introduced by 4.64/PH/07, in addition to the one
88 fixed by 4.65/MH/01 (is this a record?) are fixed:
90 (i) An empty string was always treated as zero by the numeric comparison
91 operators. This behaviour has been restored.
93 (ii) It is documented that the numeric comparison operators always treat
94 their arguments as decimal numbers. This was broken in that numbers
95 starting with 0 were being interpreted as octal.
97 While fixing these problems I realized that there was another issue that
98 hadn't been noticed. Values of message_size_limit (both the global option
99 and the transport option) were treated as octal if they started with 0.
100 The documentation was vague. These values are now always treated as
101 decimal, and I will make that clear in the documentation.
107 TK/01 Disable default definition of HAVE_LINUX_SENDFILE. Clashes with
108 Linux large file support (_FILE_OFFSET_BITS=64) on older glibc
111 MH/01 Don't check that the operands of numeric comparison operators are
112 integers when their expansion is in "skipping" mode (fixes bug
113 introduced by 4.64-PH/07).
115 PH/01 If a system filter or a router generates more than SHRT_MAX (32767)
116 child addresses, Exim now panics and dies. Previously, because the count
117 is held in a short int, deliveries were likely to be lost. As such a
118 large number of recipients for a single message is ridiculous
119 (performance will be very, very poor), I have chosen to impose a limit
120 rather than extend the field.
126 TK/01 Bugzilla #401. Fix DK spooling code so that it can overwrite a
127 leftover -K file (the existence of which was triggered by #402).
128 While we were at it, introduced process PID as part of the -K
129 filename. This should rule out race conditions when creating
132 TK/02 Bugzilla #402. Apply patch from Simon Arlott, speeding up DK signing
133 processing considerably. Previous code took too long for large mails,
134 triggering a timeout which in turn triggers #401.
136 TK/03 Introduced HAVE_LINUX_SENDFILE to os.h-Linux. Currently only used
137 in the DK code in transports.c. sendfile() is not really portable,
138 hence the _LINUX specificness.
140 TF/01 In the add_headers option to the mail command in an Exim filter,
141 there was a bug that Exim would claim a syntax error in any
142 header after the first one which had an odd number of characters
145 PH/01 If a server that rejects MAIL FROM:<> was the target of a sender
146 callout verification, Exim cached a "reject" for the entire domain. This
147 is correct for most verifications, but it is not correct for a recipient
148 verification with use_sender or use_postmaster set, because in that case
149 the callout does not use MAIL FROM:<>. Exim now distinguishes the special
150 case of MAIL FROM:<> rejection from other early rejections (e.g.
151 rejection of HELO). When verifying a recipient using a non-null MAIL
152 address, the cache is ignored if it shows MAIL FROM:<> rejection.
153 Whatever the result of the callout, the value of the domain cache is
154 left unchanged (for any other kind of callout, getting as far as trying
155 RCPT means that the domain itself is ok).
157 PH/02 Tidied a number of unused variable and signed/unsigned warnings that
160 PH/03 On Solaris, an unexpectedly close socket (dropped connection) can
161 manifest itself as EPIPE rather than ECONNECT. When tidying away a
162 session, the daemon ignores ECONNECT errors and logs others; it now
163 ignores EPIPE as well.
165 PH/04 Applied Nico Erfurth's refactoring patch to tidy up mime.c
166 (quoted-printable decoding).
168 PH/05 Applied Nico Erfurth's refactoring patch to tidy up spool_mbox.c, and
169 later the small subsequent patch to fix an introduced bug.
171 PH/06 Installed the latest Cygwin Makefile from the Cygwin maintainer.
173 PH/07 There was no check for overflow in expansions such as ${if >{1}{4096M}}.
175 PH/08 An error is now given if message_size_limit is specified negative.
177 PH/09 Applied and tidied up Jakob Hirsch's patch for allowing ACL variables
178 to be given (somewhat) arbitrary names.
180 JJ/01 exipick 20060919.0, allow for arbitrary acl_ variables introduced
183 JJ/02 exipick 20060919.0, --show-vars args can now be regular expressions,
184 miscellaneous code fixes
186 PH/10 Added the log_reject_target ACL modifier to specify where to log
189 PH/11 Callouts were setting the name used for EHLO/HELO from $smtp_active_
190 hostname. This is wrong, because it relates to the incoming message (and
191 probably the interface on which it is arriving) and not to the outgoing
192 callout (which could be using a different interface). This has been
193 changed to use the value of the helo_data option from the smtp transport
194 instead - this is what is used when a message is actually being sent. If
195 there is no remote transport (possible with a router that sets up host
196 addresses), $smtp_active_hostname is used.
198 PH/12 Installed Andrey Panin's patch to add a dovecot authenticator. Various
199 tweaks were necessary in order to get it to work (see also 21 below):
200 (a) The code assumed that strncpy() returns a negative number on buffer
201 overflow, which isn't the case. Replaced with Exim's string_format()
203 (b) There were several signed/unsigned issues. I just did the minimum
204 hacking in of casts. There is scope for a larger refactoring.
205 (c) The code used strcasecmp() which is not a standard C function.
206 Replaced with Exim's strcmpic() function.
207 (d) The code set only $1; it now sets $auth1 as well.
208 (e) A simple test gave the error "authentication client didn't specify
209 service in request". It would seem that Dovecot has changed its
210 interface. Fortunately there's a specification; I followed it and
211 changed what the client sends and it appears to be working now.
213 PH/13 Added $message_headers_raw to provide the headers without RFC 2047
216 PH/14 Corrected misleading output from -bv when -v was also used. Suppose the
217 address A is aliased to B and C, where B exists and C does not. Without
218 -v the output is "A verified" because verification stops after a
219 successful redirection if more than one address is generated. However,
220 with -v the child addresses are also verified. Exim was outputting "A
221 failed to verify" and then showing the successful verification for C,
222 with its parentage. It now outputs "B failed to verify", showing B's
223 parentage before showing the successful verification of C.
225 PH/15 Applied Michael Deutschmann's patch to allow DNS black list processing to
226 look up a TXT record in a specific list after matching in a combined
229 PH/16 It seems that the options setting for the resolver (RES_DEFNAMES and
230 RES_DNSRCH) can affect the behaviour of gethostbyname() and friends when
231 they consult the DNS. I had assumed they would set it the way they
232 wanted; and indeed my experiments on Linux seem to show that in some
233 cases they do (I could influence IPv6 lookups but not IPv4 lookups).
234 To be on the safe side, however, I have now made the interface to
235 host_find_byname() similar to host_find_bydns(), with an argument
236 containing the DNS resolver options. The host_find_byname() function now
237 sets these options at its start, just as host_find_bydns() does. The smtp
238 transport options dns_qualify_single and dns_search_parents are passed to
239 host_find_byname() when gethostbyname=TRUE in this transport. Other uses
240 of host_find_byname() use the default settings of RES_DEFNAMES
241 (qualify_single) but not RES_DNSRCH (search_parents).
243 PH/17 Applied (a modified version of) Nico Erfurth's patch to make
244 spool_read_header() do less string testing, by means of a preliminary
245 switch on the second character of optional "-foo" lines. (This is
246 overdue, caused by the large number of possibilities that now exist.
247 Originally there were few.) While I was there, I also converted the
248 str(n)cmp tests so they don't re-test the leading "-" and the first
249 character, in the hope this might squeeze out yet more improvement.
251 PH/18 Two problems with "group" syntax in header lines when verifying: (1) The
252 flag allowing group syntax was set by the header_syntax check but not
253 turned off, possible causing trouble later; (2) The flag was not being
254 set at all for the header_verify test, causing "group"-style headers to
255 be rejected. I have now set it in this case, and also caused header_
256 verify to ignore an empty address taken from a group. While doing this, I
257 came across some other cases where the code for allowing group syntax
258 while scanning a header line wasn't quite right (mostly, not resetting
259 the flag correctly in the right place). These bugs could have caused
260 trouble for malformed header lines. I hope it is now all correct.
262 PH/19 The functions {pwcheck,saslauthd}_verify_password() are always called
263 with the "reply" argument non-NULL. The code, however (which originally
264 came from elsewhere) had *some* tests for NULL when it wrote to *reply,
265 but it didn't always do it. This confused somebody who was copying the
266 code for some other use. I have removed all the tests.
268 PH/20 It was discovered that the GnuTLS code had support for RSA_EXPORT, a
269 feature that was used to support insecure browsers during the U.S. crypto
270 embargo. It requires special client support, and Exim is probably the
271 only MTA that supported it -- and would never use it because real RSA is
272 always available. This code has been removed, because it had the bad
273 effect of slowing Exim down by computing (never used) parameters for the
274 RSA_EXPORT functionality.
276 PH/21 On the advice of Timo Sirainen, added a check to the dovecot
277 authenticator to fail if there's a tab character in the incoming data
278 (there should never be unless someone is messing about, as it's supposed
279 to be base64-encoded). Also added, on Timo's advice, the "secured" option
280 if the connection is using TLS or if the remote IP is the same as the
281 local IP, and the "valid-client-cert option" if a client certificate has
284 PH/22 As suggested by Dennis Davis, added a server_condition option to *all*
285 authenticators. This can be used for authorization after authentication
286 succeeds. (In the case of plaintext, it servers for both authentication
289 PH/23 Testing for tls_required and lost_connection in a retry rule didn't work
290 if any retry times were supplied.
292 PH/24 Exim crashed if verify=helo was activated during an incoming -bs
293 connection, where there is no client IP address to check. In this
294 situation, the verify now always succeeds.
296 PH/25 Applied John Jetmore's -Mset patch.
298 PH/26 Added -bem to be like -Mset, but loading a message from a file.
300 PH/27 In a string expansion for a processed (not raw) header when multiple
301 headers of the same name were present, leading whitespace was being
302 removed from all of them, but trailing whitespace was being removed only
303 from the last one. Now trailing whitespace is removed from each header
304 before concatenation. Completely empty headers in a concatenation (as
307 PH/28 Fixed bug in backwards-compatibility feature of PH/09 (thanks to John
308 Jetmore). It would have mis-read ACL variables from pre-4.61 spool files.
310 PH/29 [Removed. This was a change that I later backed out, and forgot to
311 correct the ChangeLog entry (that I had efficiently created) before
312 committing the later change.]
314 PH/30 Exim was sometimes attempting to deliver messages that had suffered
315 address errors (4xx response to RCPT) over the same connection as other
316 messages routed to the same hosts. Such deliveries are always "forced",
317 so retry times are not inspected. This resulted in far too many retries
318 for the affected addresses. The effect occurred only when there were more
319 hosts than the hosts_max_try setting in the smtp transport when it had
320 the 4xx errors. Those hosts that it had tried were not added to the list
321 of hosts for which the message was waiting, so if all were tried, there
322 was no problem. Two fixes have been applied:
324 (i) If there are any address or message errors in an SMTP delivery, none
325 of the hosts (tried or untried) are now added to the list of hosts
326 for which the message is waiting, so the message should not be a
327 candidate for sending over the same connection that was used for a
328 successful delivery of some other message. This seems entirely
329 reasonable: after all the message is NOT "waiting for some host".
330 This is so "obvious" that I'm not sure why it wasn't done
331 previously. Hope I haven't missed anything, but it can't do any
332 harm, as the worst effect is to miss an optimization.
334 (ii) If, despite (i), such a delivery is accidentally attempted, the
335 routing retry time is respected, so at least it doesn't keep
336 hammering the server.
338 PH/31 Installed Andrew Findlay's patch to close the writing end of the socket
339 in ${readsocket because some servers need this prod.
341 PH/32 Added some extra debug output when updating a wait-xxx database.
343 PH/33 The hint "could be header name not terminated by colon", which has been
344 given for certain expansion errors for a long time, was not being given
345 for the ${if def:h_colon_omitted{... case.
347 PH/34 The spec says: "With one important exception, whenever a domain list is
348 being scanned, $domain contains the subject domain." There was at least
349 one case where this was not true.
351 PH/35 The error "getsockname() failed: connection reset by peer" was being
352 written to the panic log as well as the main log, but it isn't really
353 panic-worthy as it just means the connection died rather early on. I have
354 removed the panic log writing for the ECONNRESET error when getsockname()
357 PH/36 After a 4xx response to a RCPT error, that address was delayed (in queue
358 runs only) independently of the message's sender address. This meant
359 that, if the 4xx error was in fact related to the sender, a different
360 message to the same recipient with a different sender could confuse
361 things. In particualar, this can happen when sending to a greylisting
362 server, but other circumstances could also provoke similar problems.
363 I have changed the default so that the retry time for these errors is now
364 based a combination of the sender and recipient addresses. This change
365 can be overridden by setting address_retry_include_sender=false in the
368 PH/37 For LMTP over TCP/IP (the smtp transport), error responses from the
369 remote server are returned as part of bounce messages. This was not
370 happening for LMTP over a pipe (the lmtp transport), but now it is the
371 same for both kinds of LMTP.
373 PH/38 Despite being documented as not happening, Exim was rewriting addresses
374 in header lines that were in fact CNAMEs. This is no longer the case.
376 PH/39 If -R or -S was given with -q<time>, the effect of -R or -S was ignored,
377 and queue runs started by the daemon processed all messages. This has
378 been fixed so that -R and -S can now usefully be given with -q<time>.
380 PH/40 Import PCRE release 6.7 (fixes some bugs).
382 PH/41 Add bitwise logical operations to eval (courtesy Brad Jorsch).
384 PH/42 Give an error if -q is specified more than once.
386 PH/43 Renamed the variables $interface_address and $interface_port as
387 $received_ip_address and $received_port, to make it clear that these
388 values apply to message reception, and not to the outgoing interface when
389 a message is delivered. (The old names remain recognized, of course.)
391 PH/44 There was no timeout on the connect() call when using a Unix domain
392 socket in the ${readsocket expansion. There now is.
394 PH/45 Applied a modified version of Brad Jorsch's patch to allow "message" to
395 be meaningful with "accept".
397 SC/01 Eximstats V1.43
398 Bug fix for V1.42 with -h0 specified. Spotted by Chris Lear.
400 SC/02 Eximstats V1.44
401 Use a glob alias rather than an array ref in the generated
402 parser. This improves both readability and performance.
404 SC/03 Eximstats V1.45 (Marco Gaiarin / Steve Campbell)
405 Collect SpamAssassin and rejection statistics.
406 Don't display local sender or destination tables unless
407 there is data to show.
408 Added average volumes into the top table text output.
410 SC/04 Eximstats V1.46
411 Collect data on the number of addresses (recipients)
412 as well as the number of messages.
414 SC/05 Eximstats V1.47
415 Added 'Message too big' to the list of mail rejection
416 reasons (thanks to Marco Gaiarin).
418 SC/06 Eximstats V1.48
419 Mainlog lines which have GMT offsets and are too short to
420 have a flag are now skipped.
422 SC/07 Eximstats V1.49 (Alain Williams)
423 Added the -emptyok flag.
425 SC/08 Eximstats V1.50
426 Fixes for obtaining the IP address from reject messages.
428 JJ/03 exipick.20061117.2, made header handling as similar to exim as possible
429 (added [br]h_ prefixes, implemented RFC2047 decoding. Fixed
430 whitesspace changes from 4.64-PH/27
432 JJ/04 exipick.20061117.2, fixed format and added $message_headers_raw to
435 JJ/05 exipick.20061117.2, bug fixes (error out sooner when invalid criteria
436 are found, allow negative numbers in numeric criteria)
438 JJ/06 exipick.20061117.2, added new $message_body_missing variable
440 JJ/07 exipick.20061117.2, added $received_ip_address and $received_port
441 to match changes made in 4.64-PH/43
443 PH/46 Applied Jori Hamalainen's patch to add features to exiqsumm.
445 PH/47 Put in an explicit test for a DNS lookup of an address record where the
446 "domain" is actually an IP address, and force a failure. This locks out
447 those revolvers/nameservers that support "A-for-A" lookups, in
448 contravention of the specifications.
450 PH/48 When a host name was looked up from an IP address, and the subsequent
451 forward lookup of the name timed out, the host name was left in
452 $sender_host_name, contrary to the specification.
454 PH/49 Although default lookup types such as lsearch* or cdb*@ have always been
455 restricted to single-key lookups, Exim was not diagnosing an error if
456 * or *@ was used with a query-style lookup.
458 PH/50 Increased the value of DH_BITS in tls-gnu.c from 768 to 1024.
460 MH/01 local_scan ABI version incremented to 1.1. It should have been updated
461 long ago, but noone interested enough thought of it. Let's just say that
462 the "1.1" means that there are some new functions that weren't there at
463 some point in the past.
465 PH/51 Error processing for expansion failure of helo_data from an smtp
466 transport during callout processing was broken.
468 PH/52 Applied John Jetmore's patch to allow tls-on-connect and STARTTLS to be
469 tested/used via the -bh/-bhc/-bs options.
471 PH/53 Added missing "#include <time.h>" to pcre/pcretest.c (this was a PCRE
472 bug, fixed in subsequent PCRE releases).
474 PH/54 Applied Robert Bannocks' patch to avoid a problem with references that
475 arises when using the Solaris LDAP libraries (but not with OpenLDAP).
477 PH/55 Check for a ridiculously long file name in exim_dbmbuild.
483 SC/01 Use a glob alias rather than an array ref in eximstats generated
484 parser. This improves both readability and performance.
486 SC/02 Collect SpamAssassin and rejection statistics in eximstats.
487 Don't display local sender or destination tables in eximstats unless
488 there is data to show.
489 Added average volumes into the eximstats top table text output.
491 SC/03 Collect data on the number of addresses (recipients) as well
492 as the number of messages in eximstats.
494 TF/01 Correct an error in the documentation for the redirect router. Exim
495 does (usually) call initgroups() when daemonizing.
497 TF/02 Call initgroups() when dropping privilege in exim.c, so that Exim runs
498 with consistent privilege compared to when running as a daemon.
500 TF/03 Note in the spec that $authenticated_id is not set for local
501 submissions from trusted users.
503 TF/04 The ratelimit per_rcpt option now works correctly in acl_not_smtp.
504 Thanks to Dean Brooks <dean@iglou.com> for the patch.
506 TF/05 Make it easier to get SMTP authentication and TLS/SSL support working
507 by adding some example configuration directives to the default
508 configuration file. A little bit of work is required to uncomment the
509 directives and define how usernames and passwords are checked, but
510 there is now a framework to start from.
512 PH/01 Added #define LDAP_DEPRECATED 1 to ldap.c because some of the "old"
513 functions that Exim currently uses aren't defined in ldap.h for OpenLDAP
514 without this. I don't know how relevant this is to other LDAP libraries.
516 PH/02 Add the verb name to the "unknown ACL verb" error.
518 PH/03 Magnus Holmgren's patch for filter_prepend_home.
520 PH/03 Fixed Bugzilla #101: macro definition between ACLs doesn't work.
522 PH/04 Applied Magnus Holmgren's patch to fix Bugzilla #98: transport's home
523 directory not expanded when it should be if an expanded home directory
524 was set for the address (which is overridden by the transport).
526 PH/05 Applied Alex Kiernan's patch to fix Bugzilla #99: a problem with
529 PH/06 Added acl_not_smtp_start, based on Johannes Berg's patch, and set the
530 bit to forbid control=suppress_local_fixups in the acl_not_smtp ACL,
531 because it is too late at that time, and has no effect.
533 PH/07 Changed ${quote_pgsql to quote ' as '' instead of \' because of a
534 security issue with \' (bugzilla #107). I could not use the
535 PQescapeStringConn() function, because it needs a PGconn value as one of
538 PH/08 When testing addresses using -bt, indicate those final addresses that
539 are duplicates that would not cause an additional delivery. At least one
540 person was confused, thinking that -bt output corresponded to deliveries.
541 (Suppressing duplicates isn't a good idea as you lose the information
542 about possibly different redirections that led to the duplicates.)
544 PH/09 Applied patch from Erik to use select() instead of poll() in spam.c on
545 systems where poll() doesn't work, in particular OS X.
547 PH/10 Added more information to debugging output for retry time not reached.
549 PH/11 Applied patch from Arkadiusz Miskiewicz to apply a timeout to read
550 operations in malware.c.
552 PH/12 Applied patch from Magnus Holmgren to include the "h" tag in Domain Keys
555 PH/13 If write_rejectlog was set false when logging was sent to syslog with
556 syslog_duplication set false, log lines that would normally be written
557 both the the main log and to the reject log were not written to syslog at
560 PH/14 In the default configuration, change the use of "message" in ACL warn
561 statements to "add_header".
563 PH/15 Diagnose a filter syntax error for "seen", "unseen", or "noerror" if not
564 not followed by a command (e.g. "seen endif").
566 PH/16 Recognize SMTP codes at the start of "message" in ACLs and after :fail:
567 and :defer: in a redirect router. Add forbid_smtp_code to suppress the
570 PH/17 Added extra conditions to the default value of delay_warning_condition
574 { !eq{$h_list-id:$h_list-post:$h_list-subscribe:}{} } \
575 { match{$h_precedence:}{(?i)bulk|list|junk} } \
576 { match{$h_auto-submitted:}{(?i)auto-generated|auto-replied} } \
579 The Auto-Submitted: and various List- headers are standardised, whereas I
580 don't think Precedence: ever was.
582 PH/18 Refactored debugging code in route_finduser() to show more information,
583 in particular, the error code if getpwnam() issues one.
585 PH/19 Added PQsetClientEncoding(conn, "SQL_ASCII") to the pgsql code module.
586 This is apparently needed in addition to the PH/07 change above to avoid
587 any possible encoding problems.
589 PH/20 Perl can change the locale. Exim was resetting it after a ${perl call,
590 but not after initializing Perl.
592 PH/21 Added a call to PQsetNoticeProcessor() to catch pgsql "notices" and
593 output them only if debugging. By default they are written stderr,
594 apparently, which is not desirable.
596 PH/22 Added Alain Williams' LDAP patch to support setting REFERRALS=off on
599 JJ/01 exipick: added --reverse (and -R synonym), --random, --size, --sort and
602 JJ/02 exipick: rewrote --help documentation to hopefully make more clear.
604 PH/23 Made -oMaa and -oMt work with -bh and -bs to pretend the connection is
605 authenticated or an ident call has been made. Suppress the default
606 values for $authenticated_id and $authenticated_sender (but permit -oMai
607 and -oMas) when testing with -bh.
609 PH/24 Re-jigged the order of the tests in the default configuration so that the
610 tests for valid domains and recipients precede the DNS black list and CSA
611 tests, on the grounds that those ones are more expensive.
613 PH/25 Exim was not testing for a space following SMTP commands such as EHLO
614 that require one. Thus, EHLORHUBARB was interpreted as a valid command.
615 This bug exists in every version of Exim that I still have, right back to
618 PH/26 (n)wildlsearch lookups are documented as being done case-insensitively.
619 However, an attempt to turn on case-sensitivity in a regex key by
620 including (?-i) didn't work because the subject string was already
621 lowercased, and the effects were non-intuitive. It turns out that a
622 one-line patch can be used to allow (?-i) to work as expected.
628 TF/01 Fix the add_header change below (4.61 PH/55) which had a bug that (amongst
629 other effects) broke the use of negated acl sub-conditions.
631 PH/01 ${readsocket now supports Internet domain sockets (modified John Jetmore
634 PH/02 When tcp-wrappers is called from Exim, it returns only "deny" or "allow".
635 "Deny" causes Exim to reject the incoming connection with a 554 error.
636 Unfortunately, if there is a major crisis, such as a disk failure,
637 tcp-wrappers gives "deny", whereas what one would like would be some
638 kind of temporary error. A kludge has been added to help with this.
639 Before calling hosts_ctl(), errno is set zero. If the result is "deny", a
640 554 error is used if errno is still zero or contains ENOENT (which occurs
641 if either of the /etc/hosts.{allow,deny} files is missing). Otherwise, a
644 PH/03 Add -lutil to the default FreeBSD LIBS setting.
646 PH/04 Change PH/19 for 4.61 was too wide. It should not be applied to host
647 errors. Otherwise a message that provokes a temporary error (when other
648 messages do not) can cause a whole host to time out.
650 PH/05 Batch deliveries by appendfile and pipe transports did not work when the
651 addresses were routed directly to files or pipes from a redirect router.
652 File deliveries just didn't batch; pipe deliveries might have suffered
655 PH/06 A failure to get a lock for a hints database would erroneously always say
656 "Failed to get write lock", even when it was really a read lock.
658 PH/07 The appendfile transport was creating MBX lock files with a fixed mode
659 of 0600. This has been changed to use the value of the lockfile_mode
660 option (which defaults to 0600).
662 PH/08 Applied small patch from the Sieve maintainer.
664 PH/09 If maildir_quota_directory_regex was set to exclude (say) the .Trash
665 folder from quota calculations, a direct delivery into this folder messed
666 up the contents of the maildirsize file. This was because the regex was
667 used only to exclude .Trash (or whatever) when the size of the mailbox
668 was calculated. There was no check that a delivery was happening into an
669 excluded directory. This bug has been fixed by ignoring all quota
670 processing for deliveries into excluded directories.
672 PH/10 Added the maildirfolder_create_regex option to appendfile.
678 PH/01 The code for finding all the local interface addresses on a FreeBSD
679 system running IPv6 was broken. This may well have applied to all BSD
680 systems, as well as to others that have similar system calls. The broken
681 code found IPv4 interfaces correctly, but gave incorrect values for the
682 IPv6 interfaces. In particular, ::1 was not found. The effect in Exim was
683 that it would not match correctly against @[] and not recognize the IPv6
686 PH/02 The ipliteral router was not recognizing addresses of the form user@
687 [ipv6:....] because it didn't know about the "ipv6:" prefix.
689 PH/03 Added disable_ipv6.
691 PH/04 Changed $reply_address to use the raw form of the headers instead of the
692 decoded form, because it is most often used to construct To: headers
693 lines in autoreplies, and the decoded form may well be syntactically
694 invalid. However, $reply_address has leading white space removed, and all
695 newlines turned into spaces so that the autoreply transport does not
698 PH/05 If group was specified without a user on a router, and no group or user
699 was specified on a transport, the group from the router was ignored.
701 PH/06 Increased the number of ACL variables to 20 of each type, and arranged
702 for visible compile-time settings that can be used to change these
703 numbers, for those that want even more. Backwards compatibility with old
704 spool files has been maintained. However, going back to a previous Exim
705 release will lost any variables that are in spool files.
707 PH/07 Two small changes when running in the test harness: increase delay when
708 passing a TCP/IP connection to a new process, in case the original
709 process has to generate a bounce, and remove special handling of
710 127.0.0.2 (sic), which is no longer necessary.
712 PH/08 Changed debug output of dbfn_open() flags from numbers to names, so as to
713 be the same on different OS.
715 PH/09 Moved a debug statement in filter processing to avoid a race problem when
718 JJ/01 exipick: fixed bug where -b (brief) output option showed "Vars:"
719 whether --show-vars was specified or not
721 JJ/02 exipick: Added support for new ACL variable spool format introduced
724 PH/10 Fixed another bug related to PH/04 above: if an incoming message had a
725 syntactically invalid From: or Reply-to: line, and a filter used this to
726 generate an autoreply, and therefore failed to obtain an address for the
727 autoreply, Exim could try to deliver to a non-existent relative file
728 name, causing unrelated and misleading errors. What now happens is that
729 it logs this as a hard delivery error, but does not attempt to create a
732 PH/11 The exinext utility has a -C option for testing purposes, but although
733 the given file was scanned by exinext itself; it wasn't being passed on
734 when Exim was called.
736 PH/12 In the smtp transport, treat an explicit ECONNRESET error the same as
737 an end-of-file indication when reading a command response.
739 PH/13 Domain literals for IPv6 were not recognized unless IPv6 support was
740 compiled. In many other places in Exim, IPv6 addresses are always
741 recognized, so I have changed this. It also means that IPv4 domain
742 literals of the form [IPV4:n.n.n.n] are now always recognized.
744 PH/14 When a uid/gid is specified for the queryprogram router, it cannot be
745 used if the router is not running as root, for example, when verifying at
746 ACL time, or when using -bh. The debugging output from this situation was
747 non-existent - all you got was a failure to exec. I have made two
750 (a) Failures to set uid/gid, the current directory, or a process leader
751 in a subprocess such as that created by queryprogram now generate
752 suitable debugging ouput when -d is set.
754 (b) The queryprogram router detects when it is not running as root,
755 outputs suitable debugging information if -d is set, and then runs
756 the subprocess without attempting to change uid/gid.
758 PH/15 Minor change to Makefile for building test_host (undocumented testing
761 PH/16 As discussed on the list in Nov/Dec: Exim no longer looks at the
762 additional section of a DNS packet that returns MX or SRV records.
763 Instead, it always explicitly searches for A/AAAA records. This avoids
764 major problems that occur when a DNS server includes only records of one
765 type (A or AAAA) in an MX/SRV packet. A byproduct of this change has
766 fixed another bug: if SRV records were looked up and the corresponding
767 address records were *not* found in the additional section, the port
768 values from the SRV records were lost.
770 PH/17 If a delivery to a pipe, file, or autoreply was deferred, Exim was not
771 using the correct key (the original address) when searching the retry
772 rules in order to find which one to use for generating the retry hint.
774 PH/18 If quota_warn_message contains a From: header, Exim now refrains from
775 adding the default one. Similarly, if it contains a Reply-To: header, the
776 errors_reply_to option, if set, is not used.
778 PH/19 When calculating a retry time, Exim used to measure the "time since
779 failure" by looking at the "first failed" field in the retry record. Now
780 it does not use this if it is later than than the arrival time of the
781 message. Instead it uses the arrival time. This makes for better
782 behaviour in cases where some deliveries succeed, thus re-setting the
783 "first failed" field. An example is a quota failure for a huge message
784 when small messages continue to be delivered. Without this change, the
785 "time since failure" will always be short, possible causing more frequent
786 delivery attempts for the huge message than are intended.
787 [Note: This change was subsequently modified - see PH/04 for 4.62.]
789 PH/20 Added $auth1, $auth2, $auth3 to contain authentication data (as well as
790 $1, $2, $3) because the numerical variables can be reset during some
791 expansion items (e.g. "match"), thereby losing the authentication data.
793 PH/21 Make -bV show the size of off_t variables so that the test suite can
794 decide whether to run tests for quotas > 2G.
796 PH/22 Test the values given for quota, quota_filecount, quota_warn_threshold,
797 mailbox_size, and mailbox_filecount in the appendfile transport. If a
798 filecount value is greater than 2G or if a quota value is greater than 2G
799 on a system where the size of off_t is not greater than 4, a panic error
802 PH/23 When a malformed item such as 1.2.3/24 appears in a host list, it can
803 never match. The debug and -bh output now contains an explicit error
804 message indicating a malformed IPv4 address or mask.
806 PH/24 An host item such as 1.2.3.4/abc was being treated as the IP address
807 1.2.3.4 without a mask. Now it is not recognized as an IP address, and
810 PH/25 Do not write to syslog when running in the test harness. The only
811 occasion when this arises is a failure to open the main or panic logs
812 (for which there is an explicit test).
814 PH/26 Added the /no_tell option to "control=freeze".
816 PH/27 If a host name lookup failed very early in a connection, for example, if
817 the IP address matched host_lookup and the reverse lookup yielded a name
818 that did not have a forward lookup, an error message of the form "no IP
819 address found for host xxx.xxx.xxx (during SMTP connection from NULL)"
820 could be logged. Now it outputs the IP address instead of "NULL".
822 PH/28 An enabling patch from MH: add new function child_open_exim2() which
823 allows the sender and the authenticated sender to be set when
824 submitting a message from within Exim. Since child_open_exim() is
825 documented for local_scan(), the new function should be too.
827 PH/29 In GnuTLS, a forced expansion failure for tls_privatekey was not being
828 ignored. In both GnuTLS and OpenSSL, an expansion of tls_privatekey that
829 results in an empty string is now treated as unset.
831 PH/30 Fix eximon buffer overflow bug (Bugzilla #73).
833 PH/31 Added sender_verify_fail logging option.
835 PH/32 In November 2003, the code in Exim that added an empty Bcc: header when
836 needed by RFC 822 but not by RFC 2822 was commented out. I have now
837 tidied the source and removed it altogether.
839 PH/33 When a queue run was abandoned because the load average was too high, a
840 log line was always written; now it is written only if the queue_run log
841 selector is set. In addition, the log line for abandonment now contains
842 information about the queue run such as the pid. This is always present
843 in "start" and "stop" lines but was omitted from the "abandon" line.
845 PH/34 Omit spaces between a header name and the colon in the error message that
846 is given when verify = headers_syntax fails (if there are lots of them,
847 the message gets confusing).
849 PH/35 Change the default for dns_check_names_pattern to allow slashes within
850 names, as there are now some PTR records that contain slashes. This check
851 is only to protect against broken name servers that fall over on strange
852 characters, so the fact that it applies to all lookups doesn't matter.
854 PH/36 Now that the new test suite is complete, we can remove some of the
855 special code in Exim that was needed for the old test suite. For example,
856 sorting DNS records because real resolvers return them in an arbitrary
857 order. The new test suite's fake resolver always returns records in the
860 PH/37 When running in the test harness, use -odi for submitted messages (e.g.
861 bounces) except when queue_only is set, to avoid logging races between
862 the different processes.
864 PH/38 Panic-die if .include specifies a non-absolute path.
866 PH/39 A tweak to the "H" retry rule from its user.
868 JJ/03 exipick: Removed parentheses from 'next' and 'last' calls that specified
869 a label. They prevented compilation on older perls.
871 JJ/04 exipick: Refactored code to prevent implicit split to @_ which caused
872 a warning to be raised on newish perls.
874 JJ/05 exipick: Fixed bug where -bpc always showed a count of all messages
875 on queue. Changes to match documented behaviour of showing count of
876 messages matching specified criteria.
878 PH/40 Changed the default ident timeout from 30s to 5s.
880 PH/41 Added support for the use of login_cap features, on those BSD systems
881 that have them, for controlling the resources used by pipe deliveries.
883 PH/42 The content-scanning code uses fopen() to create files in which to put
884 message data. Previously it was not paying any attention to the mode of
885 the files. Exim runs with umask(0) because the rest of the code creates
886 files with open(), and sets the required mode explicitly. Thus, these
887 files were ending up world-writeable. This was not a big issue, because,
888 being within the spool directory, they were not world-accessible. I have
889 created a function called modefopen, which takes an additional mode
890 argument. It sets umask(777), creates the file, chmods it to the required
891 mode, then resets the umask. All the relevant calls to fopen() in the
892 content scanning code have been changed to use this function.
894 PH/43 If retry_interval_max is set greater than 24 hours, it is quietly reset
895 to 24 hours. This avoids potential overflow problems when processing G
896 and H retry rules. I suspect nobody ever tinkers with this value.
898 PH/44 Added STRIP_COMMAND=/usr/bin/strip to the FreeBSD Makefile.
900 PH/45 When the plaintext authenticator is running as a client, the server's
901 challenges are checked to ensure they are valid base64 strings. By
902 default, the authentication attempt is cancelled if an invalid string is
903 received. Setting client_ignore_invalid_base64 true ignores these errors.
904 The decoded challenge strings are now placed in $auth1, $auth2, etc. as
905 they are received. Thus, the responses can be made to depend on the
906 challenges. If an invalid string is ignored, an empty string is placed in
909 PH/46 Messages that are created by the autoreply transport now contains a
910 References: header, in accordance with RFCs 2822 and 3834.
912 PH/47 Added authenticated_sender_force to the smtp transport.
914 PH/48 The ${prvs expansion was broken on systems where time_t was long long.
916 PH/49 Installed latest patch from the Sieve maintainer.
918 PH/50 When an Exim quota was set without a file count quota, and mailbox_size
919 was also set, the appendfile transport was unnecessarily scanning a
920 directory of message files (e.g. for maildir delivery) to find the count
921 of files (along with the size), even though it did not need this
922 information. It now does the scan only if it needs to find either the
923 size of the count of files.
925 PH/51 Added ${time_eval: to convert Exim time strings into seconds.
927 PH/52 Two bugs concerned with error handling when the smtp transport is
930 (i) Exim was not creating retry information for temporary errors given
931 for individual recipients after the DATA command when the smtp transport
932 was used in LMTP mode. This meant that they could be retried too
933 frequently, and not timed out correctly.
935 (ii) Exim was setting the flag that allows error details to be returned
936 for LMTP errors on RCPT commands, but not for LMTP errors for individual
937 recipients that were returned after the DATA command.
939 PH/53 This is related to PH/52, but is more general: for any failing address,
940 when detailed error information was permitted to be returned to the
941 sender, but the error was temporary, then after the final timeout, only
942 "retry timeout exceeded" was returned. Now it returns the full error as
943 well as "retry timeout exceeded".
945 PH/54 Added control=allow_auth_unadvertised, as it seems there are clients that
946 do this, and (what is worse) MTAs that accept it.
948 PH/55 Added the add_header modified to ACLs. The use of "message" with "warn"
949 will now be deprecated.
951 PH/56 New os.c-cygwin from the Cygwin maintainer.
953 JJ/06 exipick: added --unsorted option to allow unsorted output in all output
954 formats (previously only available in exim formats via -bpr, -bpru,
955 and -bpra. Now also available in native and exiqgrep formats)
957 JJ/07 exipick: added --freeze and --thaw options to allow faster interaction
958 with very large, slow to parse queues
960 JJ/08 exipick: added ! as generic prefix to negate any criteria format
962 JJ/09 exipick: miscellaneous performance enhancements (~24% improvements)
964 PH/57 Tidies in SMTP dialogue display in debug output: (i) It was not showing
965 responses to authentication challenges, though it was showing the
966 challenges; (ii) I've removed the CR characters from the debug output for
969 PH/58 Allow for the insertion of a newline as well as a space when a string
970 is turned into more than one encoded-word during RFC 2047 encoding. The
971 Sieve code now uses this.
973 PH/59 Added the following errors that can be detected in retry rules: mail_4xx,
974 data_4xx, lost_connection, tls_required.
976 PH/60 When a VRFY deferred or FAILED, the log message rather than the user
977 message was being sent as an SMTP response.
979 PH/61 Add -l and -k options to exicyclog.
981 PH/62 When verifying, if an address was redirected to one new address, so that
982 verification continued, and the new address failed or deferred after
983 having set something in $address_data, the value of $address_data was not
984 passed back to the ACL. This was different to the case when no
985 redirection occurred. The value is now passed back in both cases.
987 PH/63 Changed the macro HAVE_LOGIN_CAP (see PH/41 for this release above) to
988 HAVE_SETCLASSRESOURCES because there are different APIs in use that all
989 use login_cap.h, so on its own it isn't the distinguishing feature. The
990 new name refers directly to the setclassresources() function.
992 PH/65 Added configuration files for NetBSD3.
994 PH/66 Updated OS/Makefile-HP-UX for gcc 4.1.0 with HP-UX 11.
996 PH/67 Fixed minor infelicity in the sorting of addresses to ensure that IPv6
997 is preferred over IPv4.
999 PH/68 The bounce_return_message and bounce_return_body options were not being
1000 honoured for bounces generated during the reception of non-SMTP messages.
1001 In particular, this applied to messages rejected by the ACL. This bug has
1002 been fixed. However, if bounce_return_message is true and bounce_return_
1003 body is false, the headers that are returned for a non-SMTP message
1004 include only those that have been read before the error was detected.
1005 (In the case of an ACL rejection, they have all been read.)
1007 PH/69 The HTML version of the specification is now built in a directory called
1008 spec_html instead of spec.html, because the latter looks like a path with
1009 a MIME-type, and this confuses some software.
1011 PH/70 Catch two compiler warnings in sieve.c.
1013 PH/71 Fixed an obscure and subtle bug (thanks Alexander & Matthias). The
1014 function verify_get_ident() calls ip_connect() to connect a socket, but
1015 if the "connect()" function timed out, ip_connect() used to close the
1016 socket. However, verify_get_ident() also closes the socket later, and in
1017 between Exim writes to the log, which may get opened at this point. When
1018 the socket was closed in ip_connect(), the log could get the same file
1019 descriptor number as the socket. This naturally causes chaos. The fix is
1020 not to close the socket in ip_connect(); the socket should be closed by
1021 the function that creates it. There was only one place in the code where
1022 this was missing, in the iplookup router, which I don't think anybody now
1023 uses, but I've fixed it anyway.
1025 PH/72 Make dns_again_means_nonexist apply to lookups using gethostbyname() as
1026 well as to direct DNS lookups. Otherwise the handling of names in host
1027 lists is inconsistent and therefore confusing.
1033 PH/01 Two changes to the default runtime configuration:
1035 (1) Move the checks for relay_from_hosts and authenticated clients from
1036 after to before the (commented out) DNS black list checks.
1038 (2) Add control=submission to the relay_from_hosts and authenticated
1039 clients checks, on the grounds that messages accepted by these
1040 statements are most likely to be submissions.
1042 PH/02 Several tidies to the handling of ${prvs and ${prvscheck:
1044 (1) Generate an error if the third argument for the ${prvs expansion is
1047 (2) Treat a missing third argument of ${prvscheck as if it were an empty
1050 (3) Reset the variables that are obtained from the first argument of
1051 ${prvscheck and used in the second argument before leaving the code,
1052 because their memory is reclaimed, so using them afterwards may do
1055 (4) Tidy up the code for expanding the arguments of ${prvscheck one by
1056 one (it's much easier than Tom thought :-).
1058 (5) Because of (4), we can now allow for the use of $prvscheck_result
1059 inside the third argument.
1061 PH/03 For some reason, the default setting of PATH when running a command from
1062 a pipe transport was just "/usr/bin". I have changed it to
1065 PH/04 SUPPORT_TRANSLATE_IP_ADDRESS and MOVE_FROZEN_MESSAGES did not cause
1066 anything to be listed in the output from -bV.
1068 PH/05 When a filter generated an autoreply, the entire To: header line was
1069 quoted in the delivery log line, like this:
1071 => >A.N.Other <ano@some.domain> <original@ddress> ...
1073 This has been changed so that it extracts the operative address. There
1074 may be more than one such address. If so, they are comma-separated, like
1077 => >ano@some.domain,ona@other.domain <original@ddress> ...
1079 PH/06 When a client host used a correct literal IP address in a HELO or EHLO
1080 command, (for example, EHLO [1.2.3.4]) and the client's IP address was
1081 not being looked up in the rDNS to get a host name, Exim was showing the
1082 IP address twice in Received: lines, even though the IP addresses were
1083 identical. For example:
1085 Received: from [1.2.3.4] (helo=[1.2.3.4])
1087 However, if the real host name was known, it was omitting the HELO data
1088 if it matched the actual IP address. This has been tidied up so that it
1089 doesn't show the same IP address twice.
1091 PH/07 When both +timestamp and +memory debugging was on, the value given by
1092 $tod_xxx expansions could be wrong, because the tod_stamp() function was
1093 called by the debug printing, thereby overwriting the timestamp buffer.
1094 Debugging no longer uses the tod_stamp() function when +timestamp is set.
1096 PH/08 When the original message was included in an autoreply transport, it
1097 always said "this is a copy of the message, including all the headers",
1098 even if body_only or headers_only was set. It now gives an appropriate
1101 PH/09 Applied a patch from the Sieve maintainer which:
1103 o fixes some comments
1104 o adds the (disabled) notify extension core
1105 o adds some debug output for the result of if/elsif tests
1106 o points to the current vacation draft in the documentation
1107 and documents the missing references header update
1111 o fixes a bug in processing the envelope test (when testing
1112 multiple envelope elements, the last element determinted the
1115 PH/10 Exim was violating RFC 3834 ("Recommendations for Automatic Responses to
1116 Electronic Mail") by including:
1118 Auto-submitted: auto-generated
1120 in the messages that it generates (bounce messages and others, such as
1121 warnings). In the case of bounce messages for non-SMTP mesages, there was
1122 also a typo: it was using "Auto_submitted" (underscore instead of
1123 hyphen). Since every message generated by Exim is necessarily in response
1124 to another message, thes have all been changed to:
1126 Auto-Submitted: auto-replied
1128 in accordance with these statements in the RFC:
1130 The auto-replied keyword:
1132 - SHOULD be used on messages sent in direct response to another
1133 message by an automatic process,
1135 - MUST NOT be used on manually-generated messages,
1137 - MAY be used on Delivery Status Notifications (DSNs) and Message
1138 Disposition Notifications (MDNs),
1140 - MUST NOT be used on messages generated by automatic or periodic
1141 processes, except for messages which are automatic responses to
1144 PH/11 Added "${if def:sender_address {(envelope-from <$sender_address>)\n\t}}"
1145 to the default Received: header definition.
1147 PH/12 Added log selector acl_warn_skipped (default on).
1149 PH/13 After a successful wildlsearch lookup, discard the values of numeric
1150 variables because (a) they are in the wrong storage pool and (b) even if
1151 they were copied, it wouldn't work properly because of the caching.
1153 PH/14 Add check_rfc2047_length to disable enforcement of RFC 2047 length
1154 checking when decoding. Apparently there are clients that generate
1155 overlong encoded strings. Why am I not surprised?
1157 PH/15 If the first argument of "${if match_address" was not empty, but did not
1158 contain an "@" character, Exim crashed. Now it writes a panic log message
1159 and treats the condition as false.
1161 PH/16 In autoreply, treat an empty string for "once" the same as unset.
1163 PH/17 A further patch from the Sieve maintainer: "Introduce the new Sieve
1164 extension "envelope-auth". The code is finished and in agreement with
1165 other implementations, but there is no documentation so far and in fact,
1166 nobody wrote the draft yet. This extension is currently #undef'ed, thus
1167 not changing the active code.
1169 Print executed "if" and "elsif" statements when debugging is used. This
1170 helps a great deal to understand what a filter does.
1172 Document more things not specified clearly in RFC3028. I had all this
1173 sorted out, when out of a sudden new issues came to my mind. Oops."
1175 PH/18 Exim was not recognizing the "net-" search type prefix in match_ip lists
1178 PH/19 Exim expands the IPv6 address given to -bh to its full non-abbreviated
1179 canonical form (as documented). However, after a host name lookup from
1180 the IP address, check_host() was doing a simple string comparison with
1181 addresses acquired from the DNS when checking that the found name did
1182 have the original IP as one of its addresses. Since any found IPv6
1183 addresses are likely to be in abbreviated form, the comparison could
1184 fail. Luckily, there already exists a function for doing the comparison
1185 by converting both addresses to binary, so now that is used instead of
1186 the text comparison.
1188 PH/20 There was another similar case to PH/19, when a complete host name was
1189 given in a host list; looking up its IP address could give an abbreviated
1190 form, whereas the current host's name might or might not be abbreviated.
1191 The same fix has been applied.
1197 PH/01 The ${base62: operator adjusted itself to base 36 when BASE_62 was
1198 set to 36 (for Darwin and Cygwin), but the ${base62d: operator did not.
1201 PH/02 Two minor problems detected in Cygwin: the os.{c,h} files had lost */ on
1202 the CVS lines, and there was a missing #if HAVE_IPV6 in host.c.
1204 PH/03 Typo: missing ".o" in src/pcre/Makefile.
1206 PH/04 Tighten up "personal" tests: Instead of testing for any "List-"
1207 header line, restrict the check to what is listed in RFCs 2369 and 2929.
1208 Also, for "Auto-Submitted", treat anything other than "no" as
1209 non-personal, in accordance with RFC 3834. (Previously it treated
1210 anything starting "auto-" as non-personal.)
1212 TF/01 The control=submission/name=... option had a problem with syntax
1213 errors if the name included a slash character. The /name= option
1214 now slurps the rest of the string, so it can include any characters
1215 but it must come last in the list of options (after /sender_retain
1218 PH/05 Some modifications to the interface to the fake nameserver for the new
1226 TK/01 Added the "success_on_redirect" address verification option. See
1227 NewStuff for rationale and an example.
1229 PH/01 Added support for SQLite, basic code supplied by David Woodhouse.
1231 PH/02 Patch to exigrep to allow it to work on syslog lines.
1233 PH/03 When creating an mbox file for a virus/spam scan, use fseek() instead of
1234 fread() to skip over the body file's header line, because in Cygwin the
1235 header line is locked and is inaccessible.
1237 PH/04 Added $message_exim_id, ultimately to replace $message_id (they will both
1238 co-exist for some time) to make it clear that it is the Exim ID that is
1239 referenced, not the Message-ID: header line.
1241 PH/05 Replaced all Tom's calls to snprintf() with calls to the internal
1242 string_format() function, because snprintf() does not exist on all
1245 PH/06 The use of forbid_filter_existstest now also locks out the use of the
1246 ${stat: expansion item.
1248 PH/07 Changed "SMTP protocol violation: synchronization error" into "SMTP
1249 protocol synchronization error", to keep the pedants happy.
1251 PH/08 Arrange for USE_INET_NTOA_FIX to be set in config.h for AIX systems as
1252 well as for IRIX systems, when gcc is being used. See the host.c source
1255 PH/09 Installed latest Cygwin configuration files from the Cygwin maintainer.
1257 PH/10 Named domain lists were not working if used in a queue_smtp_domains
1260 PH/11 Added support for the IGNOREQUOTA extension to LMTP, both to the lmtp
1261 transport and to the smtp transport in LMTP mode.
1263 TK/02 Remove one case of BASE64 error detection FTTB (undocumented anyway).
1265 PH/12 There was a missing call to search_tidyup() before the fork() in rda.c to
1266 run a filter in a subprocess. This could lead to confusion in subsequent
1267 lookups in the parent process. There should also be a search_tidyup() at
1268 the end of the subprocess.
1270 PH/13 Previously, if "verify = helo" was set in an ACL, the condition was true
1271 only if the host matched helo_try_verify_hosts, which caused the
1272 verification to occur when the EHLO/HELO command was issued. The ACL just
1273 tested the remembered result. Now, if a previous verification attempt has
1274 not happened, "verify = helo" does it there and then.
1276 JJ/01 exipick: added $message_exim_id variable (see 4.53-PH/04)
1278 TK/03 Fix log output including CR from clamd.
1280 PH/14 A reference to $reply_address when Reply-to: was empty and From: did not
1281 exist provoked a memory error which could cause a segfault.
1283 PH/15 Installed PCRE 6.2
1285 PH/17 Defined BIND_8_COMPAT in the Darwin os.h file.
1287 PH/18 Reversed 4.52/PH/17 because the HP-UX user found it wasn't the cause
1288 of the problem. Specifically, suggested +O2 rather than +O1 for the
1291 PH/19 Added sqlite_lock_timeout option (David Woodhouse's patch).
1293 PH/20 If a delivery was routed to a non-standard port by means of an SRV
1294 record, the port was not correctly logged when the outgoing_port log
1295 selector was set (it logged the transort's default port).
1297 PH/21 Added support for host-specific ports to manualroute, queryprogram,
1298 fallback_hosts, and "hosts" in the smtp transport.
1300 PH/22 If the log selector "outgoing_port" is set, the port is now also given on
1301 host errors such as "Connection refused".
1303 PH/23 Applied a patch to fix problems with exim-4.52 while doing radius
1304 authentication with radiusclient 0.4.9:
1306 - Error returned from rc_read_config was caught wrongly
1307 - Username/password not passed on to radius server due to wrong length.
1309 The presumption is that some radiusclient API changes for 4.51/PH/17
1310 were not taken care of correctly. The code is still untested by me (my
1311 Linux distribution still has 0.3.2 of radiusclient), but it was
1312 contributed by a Radius user.
1314 PH/24 When doing a callout, the value of $domain wasn't set correctly when
1315 expanding the "port" option of the smtp transport.
1317 TK/04 MIME ACL: Fix buffer underrun that occurs when EOF condition is met
1318 while reading a MIME header. Thanks to Tom Hughes for a patch.
1320 PH/24 Include config.h inside local_scan.h so that configuration settings are
1323 PH/25 Make $smtp_command_argument available after all SMTP commands. This means
1324 that in an ACL for RCPT (for example), you can examine exactly what was
1327 PH/26 Exim was recognizing IPv6 addresses of the form [IPv6:....] in EHLO
1328 commands, but it was not correctly comparing the address with the actual
1329 client host address. Thus, it would show the EHLO address in Received:
1330 header lines when this was not necessary.
1332 PH/27 Added the % operator to ${eval:}.
1334 PH/28 Exim tries to create and chdir to its spool directory when it starts;
1335 it should be ignoring failures (because with -C, for example, it has lost
1336 privilege). It wasn't ignoring creation failures other than "already
1339 PH/29 Added "crypteq" to the list of supported features that Exim outputs when
1342 PH/30 Fixed (presumably very longstanding) bug in exim_dbmbuild: if it failed
1343 because an input line was too long, either on its own, or by virtue of
1344 too many continuations, the temporary file was not being removed, and the
1345 return code was incorrect.
1347 PH/31 Missing "BOOL" in function definition in filtertest.c.
1349 PH/32 Applied Sieve patches from the maintainer.
1351 TK/05 Domainkeys: Accomodate for a minor API change in libdomainkeys 0.67.
1353 PH/33 Added "verify = not_blind".
1355 PH/34 There are settings for CHOWN_COMMAND and MV_COMMAND that can be used in
1356 Local/Makefile (with some defaults set). These are used in built scripts
1357 such as exicyclog, but they have never been used in the exim_install
1358 script (though there are many overriding facilities there). I have
1359 arranged that the exim_install script now takes note of these two
1362 PH/35 Installed configuration files for Dragonfly.
1364 PH/36 When a locally submitted message by a trusted user did not contain a
1365 From: header, and the sender address was obtained from -f or from an SMTP
1366 MAIL command, and the trusted user did not use -F to supply a sender
1367 name, $originator_name was incorrectly used when constructing a From:
1368 header. Furthermore, $originator_name was used for submission mode
1369 messages from external hosts without From: headers in a similar way,
1370 which is clearly wrong.
1372 PH/37 Added control=suppress_local_fixups.
1374 PH/38 When log_selector = +received_sender was set, and the addition of the
1375 sender made the log line's construction buffer exactly full, or one byte
1376 less than full, an overflow happened when the terminating "\n" was
1379 PH/39 Added a new log selector, "unknown_in_list", which provokes a log entry
1380 when the result of a list match is failure because a DNS lookup failed.
1382 PH/40 RM_COMMAND is now used in the building process.
1384 PH/41 Added a "distclean" target to the top-level Makefile; it deletes all
1385 the "build-* directories that it finds.
1387 PH/42 (But a TF fix): In a domain list, Exim incorrectly matched @[] if the IP
1388 address in a domain literal was a prefix of an interface address.
1390 PH/43 (Again a TF fix): In the dnslookup router, do not apply widen_domains
1391 when verifying a sender address, unless rewrite_headers is false.
1393 PH/44 Wrote a long comment about why errors_to addresses are verified as
1394 recipients, not senders.
1396 TF/01 Add missing LIBS=-lm to OS/Makefile-OpenBSD which was overlooked when
1397 the ratelimit ACL was added.
1399 PH/45 Added $smtp_command for the full command (cf $smtp_command_argument).
1401 PH/46 Added extra information about PostgreSQL errors to the error string.
1403 PH/47 Added an interface to a fake DNS resolver for use by the new test suite,
1404 avoiding the need to install special zones in a real server. This is
1405 backwards compatible; if it can't find the fake resolver, it drops back.
1406 Thus, both old and new test suites can be run.
1408 TF/02 Added util/ratelimit.pl
1410 TF/03 Minor fix to the ratelimit code to improve its behaviour in case the
1411 clock is set back in time.
1413 TF/04 Fix the ratelimit support in exim_fixdb. Patch provided by Brian
1414 Candler <B.Candler@pobox.com>.
1416 TF/05 The fix for PH/43 was not completely correct; widen_domains is always
1417 OK for addresses that are the result of redirections.
1419 PH/48 A number of further additions for the benefit of the new test suite,
1420 including a fake gethostbyname() that interfaces to the fake DNS resolver
1423 TF/06 The fix for widen_domains has also been applied to qualify_single and
1424 search_parents which are the other dnslookup options that can cause
1427 PH/49 Michael Haardt's randomized retrying, but as a separate retry parameter
1430 PH/50 Make never_users, trusted_users, admin_groups, trusted_groups expandable.
1432 TF/07 Exim produced the error message "an SRV record indicated no SMTP
1433 service" if it encountered an MX record with an empty target hostname.
1434 The message is now "an MX or SRV record indicated no SMTP service".
1436 TF/08 Change PH/13 introduced the possibility that verify=helo may defer,
1437 if the DNS of the sending site is misconfigured. This is quite a
1438 common situation. This change restores the behaviour of treating a
1439 helo verification defer as a failure.
1441 PH/51 If self=fail was set on a router, the bounce message did not include the
1442 actual error message.
1448 TF/01 Added support for Client SMTP Authorization. See NewStuff for details.
1450 PH/01 When a transport filter timed out in a pipe delivery, and the pipe
1451 command itself ended in error, the underlying message about the transport
1452 filter timeout was being overwritten with the pipe command error. Now the
1453 underlying error message should be appended to the second error message.
1455 TK/01 Fix poll() being unavailable on Mac OSX 10.2.
1457 PH/02 Reduce the amount of output that "make" produces by default. Full output
1458 can still be requested.
1460 PH/03 The warning log line about a condition test deferring for a "warn" verb
1461 was being output only once per connection, rather than after each
1462 occurrence (because it was using the same function as for successful
1463 "warn" verbs). This seems wrong, so I have changed it.
1465 TF/02 Two buglets in acl.c which caused Exim to read a few bytes of memory that
1466 it should not have, which might have caused a crash in the right
1467 circumstances, but probably never did.
1469 PH/04 Installed a modified version of Tony Finch's patch to make submission
1470 mode fix the return path as well as the Sender: header line, and to
1471 add a /name= option so that you can make the user's friendly name appear
1474 TF/03 Added the control = fakedefer ACL modifier.
1476 TF/04 Added the ratelimit ACL condition. See NewStuff for details. Thanks to
1477 Mark Lowes for thorough testing.
1479 TK/02 Rewrote SPF support to work with libspf2 versions >1.2.0.
1481 TK/03 Merged latest SRS patch from Miles Wilton.
1483 PH/05 There's a shambles in IRIX6 - it defines EX_OK in unistd.h which conflicts
1484 with the definition in sysexits.h (which is #included earlier).
1485 Fortunately, Exim does not actually use EX_OK. The code used to try to
1486 preserve the sysexits.h value, by assumimg that macro definitions were
1487 scanned for macro replacements. I have been disabused of this notion,
1488 so now the code just undefines EX_OK before #including unistd.h.
1490 PH/06 There is a timeout for writing blocks of data, set by, e.g. data_timeout
1491 in the smtp transport. When a block could not be written in a single
1492 write() function, the timeout was being re-applied to each part-write.
1493 This seems wrong - if the receiver was accepting one byte at a time it
1494 would take for ever. The timeout is now adjusted when this happens. It
1495 doesn't have to be particularly precise.
1497 TK/04 Added simple SPF lookup method in EXPERIMENTAL_SPF. See NewStuff for
1498 details. Thanks to Chris Webb <chris@arachsys.com> for the patch!
1500 PH/07 Added "fullpostmaster" verify option, which does a check to <postmaster>
1501 without a domain if the check to <postmaster@domain> fails.
1503 SC/01 Eximstats: added -xls and the ability to specify output files
1504 (patch written by Frank Heydlauf).
1506 SC/02 Eximstats: use FileHandles for outputing results.
1508 SC/03 Eximstats: allow any combination of xls, txt, and html output.
1510 SC/04 Eximstats: fixed display of large numbers with -nvr option
1512 SC/05 Eximstats: fixed merging of reports with empty tables.
1514 SC/06 Eximstats: added the -include_original_destination flag
1516 SC/07 Eximstats: removed tabs and trailing whitespace.
1518 TK/05 Malware: Improve on aveserver error handling. Patch from Alex Miller.
1520 TK/06 MBOX spool code: Add real "From " MBOX separator line
1521 so the .eml file is really in mbox format (even though
1522 most programs do not really care). Patch from Alex Miller.
1524 TK/07 MBOX spool code: Add X-Envelope-From: and X-Envelope-To: headers.
1525 The latter is generated from $received_to and is only set if the
1526 message has one envelope recipient. SA can use these headers,
1527 obviously out-of-the-box. Patch from Alex Miller.
1529 PH/08 The ${def test on a variable was returning false if the variable's
1530 value was "0", contrary to what the specification has always said!
1531 The result should be true unless the variable is empty.
1533 PH/09 The syntax error of a character other than { following "${if
1534 def:variable_name" (after optional whitespace) was not being diagnosed.
1535 An expansion such as ${if def:sender_ident:{xxx}{yyy}} in which an
1536 accidental colon was present, for example, could give incorrect results.
1538 PH/10 Tidied the code in a number of places where the st_size field of a stat()
1539 result is used (not including appendfile, where other changes are about
1542 PH/11 Upgraded appendfile so that quotas larger than 2G are now supported.
1543 This involved changing a lot of size variables from int to off_t. It
1544 should work with maildirs and everything.
1546 TK/08 Apply fix provided by Michael Haardt to prevent deadlock in case of
1547 spamd dying while we are connected to it.
1549 TF/05 Fixed a ${extract error message typo reported by Jeremy Harris
1552 PH/12 Applied Alex Kiernan's patch for the API change for the error callback
1553 function for BDB 4.3.
1555 PH/13 Changed auto_thaw such that it does not apply to bounce messages.
1557 PH/14 Imported PCRE 6.0; this was more than just a trivial operation because
1558 the sources for PCRE have been re-arranged and more files are now
1561 PH/15 The code I had for printing potentially long long variables in PH/11
1562 above was not the best (it lost precision). The length of off_t variables
1563 is now inspected at build time, and an appropriate printing format (%ld
1564 or %lld) is chosen and #defined by OFF_T_FMT. We also define LONGLONG_T
1565 to be "long long int" or "long int". This is needed for the internal
1566 formatting function string_vformat().
1568 PH/16 Applied Matthew Newton's patch to exicyclog: "If log_file_path is set in
1569 the configuration file to be ":syslog", then the script "guesses" where
1570 the logs files are, rather than using the compiled in default. In our
1571 case the guess is not the same as the compiled default, so the script
1572 suddenly stopped working when I started to use syslog. The patch checks
1573 to see if log_file_path is "". If so, it attempts to read it from exim
1574 with no configuration file to get the compiled in version, before it
1575 falls back to the previous guessing code."
1577 TK/09 Added "prvs" and "prvscheck" expansion items. These help a lot with
1578 implementing BATV in an Exim configuration. See NewStuff for the gory
1581 PH/17 Applied Michael Haardt's patch for HP-UX, affecting only the os.h and
1582 Makefile that are specific to HP-UX.
1584 PH/18 If the "use_postmaster" option was set for a recipient callout together
1585 with the "random" option, the postmaster address was used as the MAIL
1586 FROM address for the random test, but not for the subsequent recipient
1587 test. It is now used for both.
1589 PH/19 Applied Michael Haardt's patch to update Sieve to RFC3028bis. "The
1590 patch removes a few documentation additions to RFC 3028, because the
1591 latest draft now contains them. It adds the new en;ascii-case comparator
1592 and a new error check for 8bit text in MIME parts. Comparator and
1593 require names are now matched exactly. I enabled the subaddress
1594 extension, but it is not well tested yet (read: it works for me)."
1596 PH/20 Added macros for time_t as for off_t (see PH/15 above) and used them to
1597 rework some of the code of TK/09 above to avoid the hardwired use of
1598 "%lld" and "long long". Replaced the call to snprintf() with a call to
1601 PH/21 Added some other messages to those in 4.51/PH/42, namely "All relevant MX
1602 records point to non-existent hosts", "retry timeout exceeded", and
1603 "retry time not reached for any host after a long failure period".
1605 PH/22 Fixed some oversights/typos causing bugs when Exim is compiled with
1606 experimental DomainKeys support:
1608 (1) The filter variables $n0-$n9 and $sn0-$sn9 were broken.
1609 (2) On an error such as an illegally used "control", the wrong name for
1610 the control was given.
1612 These problems did NOT occur unless DomainKeys support was compiled.
1614 PH/23 Added daemon_startup_retries and daemon_startup_sleep.
1616 PH/24 Added ${if match_ip condition.
1618 PH/25 Put debug statements on either side of calls to EXIM_DBOPEN() for hints
1619 databases so that it will be absolutely obvious if a crash occurs in the
1620 DB library. This is a regular occurrence (often caused by mis-matched
1623 PH/26 Insert a lot of missing (void) casts for functions such as chown(),
1624 chmod(), fcntl(), sscanf(), and other functions from stdio.h. These were
1625 picked up on a user's system that detects such things. There doesn't seem
1626 to be a gcc warning option for this - only an attribute that has to be
1627 put on the function's prototype. It seems that in Fedora Core 4 they have
1628 set this on a number of new functions. No doubt there will be more in due
1631 PH/27 If a dnslookup or manualroute router is set with verify=only, it need not
1632 specify a transport. However, if an address that was verified by such a
1633 router was the subject of a callout, Exim crashed because it tried to
1634 read the rcpt_include_affixes from the non-existent transport. Now it
1635 just assumes that the setting of that option is false. This bug was
1636 introduced by 4.51/PH/31.
1638 PH/28 Changed -d+all to exclude +memory, because that information is very
1639 rarely of interest, but it makes the output a lot bigger. People tend to
1640 do -d+all out of habit.
1642 PH/29 Removed support for the Linux-libc5 build, as it is obsolete and the
1643 code in os-type was giving problems when libc.so lives in lib64, like on
1646 PH/30 Exim's DNS code uses the original T_xxx names for DNS record times. These
1647 aren't the modern standard, and it seems that some systems' include files
1648 don't always have them. Exim was already checking for some of the newer
1649 ones like T_AAAA, and defining it itself. I've added checks for all the
1650 record types that Exim uses.
1652 PH/31 When using GnuTLS, if the parameters cache file did not exist, Exim was
1653 not automatically generating a new one, as it is supposed to. This
1654 prevented TLS from working. If the file did exist, but contained invalid
1655 data, a new version was generated, as expected. It was only the case of a
1656 non-existent file that was broken.
1658 TK/10 Domainkeys: Fix a bug in verification that caused a crash in conjunction
1659 with a change in libdomainkeys > 0.64.
1661 TK/11 Domainkeys: Change the logic how the "testing" policy flag is retrieved
1662 from DNS. If the selector record carries the flag, it now has
1663 precedence over the domain-wide flag.
1665 TK/12 Cleared some compiler warnings related to SPF, SRS and DK code.
1667 PH/32 In mua_wrapper mode, if an smtp transport configuration error (such as
1668 the use of a port name that isn't defined in /etc/services) occurred, the
1669 message was deferred as in a normal delivery, and thus remained on the
1670 spool, instead of being failed because of the mua_wrapper setting. This
1671 is now fixed, and I tidied up some of the mua_wrapper messages at the
1674 SC/08 Eximstats: whilst parsing the mainlog(s), store information about
1675 the messages in a hash of arrays rather than using individual hashes.
1676 This is a bit cleaner and results in dramatic memory savings, albeit
1677 at a slight CPU cost.
1679 SC/09 Eximstats: added the -show_rt<list> and the -show_dt<list> flags
1680 as requested by Marc Sherman.
1682 SC/10 Eximstats: added histograms for user specified patterns as requested
1685 SC/11 Eximstats: v1.43 - bugfix for pattern histograms with -h0 specified.
1687 PH/33 Patch from the Cygwin maintainer to add "b" to all occurences of
1688 fopen() in the content-scanning modules that did not already have it.
1694 TK/01 Added Yahoo DomainKeys support via libdomainkeys. See
1695 doc/experimental-spec.txt for details. (http://domainkeys.sf.net)
1697 TK/02 Fix ACL "control" statement not being available in MIME ACL.
1699 TK/03 Fix ACL "regex" condition not being available in MIME ACL.
1701 PH/01 Installed a patch from the Sieve maintainer that allows -bf to be used
1702 to test Sieve filters that use "vacation".
1704 PH/02 Installed a slightly modified version of Nikos Mavrogiannopoulos' patch
1705 that changes the way the GnuTLS parameters are stored in the cache file.
1706 The new format can be generated externally. For backward compatibility,
1707 if the data in the cache doesn't make sense, Exim assumes it has read an
1708 old-format file, and it generates new data and writes a new file. This
1709 means that you can't go back to an older release without removing the
1712 PH/03 A redirect router that has both "unseen" and "one_time" set does not
1713 work if there are any delivery delays because "one_time" forces the
1714 parent to be marked "delivered", so its unseen clone is never tried
1715 again. For this reason, Exim now forbids the simultaneous setting of
1718 PH/04 Change 4.11/85 fixed an obscure bug concerned with addresses that are
1719 redirected to themselves ("homonym" addresses). Read the long ChangeLog
1720 entry if you want to know the details. The fix, however, neglected to
1721 consider the case when local delivery batching is involved. The test for
1722 "previously delivered" was not happening when checking to see if an
1723 address could be batched with a previous (undelivered) one; under
1724 certain circumstances this could lead to multiple deliveries to the same
1727 PH/05 Renamed the macro SOCKLEN_T as EXIM_SOCKLEN_T because AIX uses SOCKLEN_T
1728 in its include files, and this causes problems building Exim.
1730 PH/06 A number of "verify =" ACL conditions have no options (e.g. verify =
1731 header_syntax) but Exim was just ignoring anything given after a slash.
1732 In particular, this caused confusion with an attempt to use "verify =
1733 reverse_host_lookup/defer_ok". An error is now given when options are
1734 supplied for verify items that do not have them. (Maybe reverse_host_
1735 lookup should have a defer_ok option, but that's a different point.)
1737 PH/07 Increase the size of the buffer for incoming SMTP commands from 512 (as
1738 defined by RFC 821) to 2048, because there were problems with some AUTH
1739 commands, and RFC 1869 says the size should be increased for extended
1740 SMTP commands that take arguments.
1742 PH/08 Added ${dlfunc dynamically loaded function for expansion (code from Tony
1745 PH/09 Previously, an attempt to use ${perl when it wasn't compiled gave an
1746 "unknown" error; now it says that the functionality isn't in the binary.
1748 PH/10 Added a nasty fudge to try to recognize and flatten LDAP passwords in
1749 an address' error message when a string expansion fails (syntax or
1750 whatever). Otherwise the password may appear in the log. Following change
1751 PH/42 below, there is no longer a chance of it appearing in a bounce
1754 PH/11 Installed exipick version 20050225.0 from John Jetmore.
1756 PH/12 If the last host in a fallback_hosts list was multihomed, only the first
1757 of its addresses was ever tried. (Bugzilla bug #2.)
1759 PH/13 If "headers_add" in a transport didn't end in a newline, Exim printed
1760 the result incorrectly in the debug output. (It correctly added a newline
1761 to what was transported.)
1763 TF/01 Added $received_time.
1765 PH/14 Modified the default configuration to add an acl_smtp_data ACL, with
1766 commented out examples of how to interface to a virus scanner and to
1767 SpamAssassin. Also added commented examples of av_scanner and
1768 spamd_address settings.
1770 PH/15 Further to TK/02 and TK/03 above, tidied up the tables of what conditions
1771 and controls are allowed in which ACLs. There were a couple of minor
1772 errors. Some of the entries in the conditions table (which is a table of
1773 where they are NOT allowed) were getting very unwieldy; rewrote them as a
1774 negation of where the condition IS allowed.
1776 PH/16 Installed updated OS/os.c-cygwin from the Cygwin maintainer.
1778 PH/17 The API for radiusclient changed at release 0.4.0. Unfortunately, the
1779 header file does not have a version number, so I've had to invent a new
1780 value for RADIUS_LIB_TYPE, namely "RADIUSCLIENTNEW" to request the new
1781 API. The code is untested by me (my Linux distribution still has 0.3.2 of
1782 radiusclient), but it was contributed by a Radius user.
1784 PH/18 Installed Lars Mainka's patch for the support of CRL collections in
1785 files or directories, for OpenSSL.
1787 PH/19 When an Exim process that is running as root has to create an Exim log
1788 file, it does so in a subprocess that runs as exim:exim so as to get the
1789 ownership right at creation (otherwise, other Exim processes might see
1790 the file with the wrong ownership). There was no test for failure of this
1791 fork() call, which would lead to the process getting stuck as it waited
1792 for a non-existent subprocess. Forks do occasionally fail when resources
1793 run out. I reviewed all the other calls to fork(); they all seem to check
1796 PH/20 When checking for unexpected SMTP input at connect time (before writing
1797 the banner), Exim was not dealing correctly with a non-positive return
1798 from the read() function. If the client had disconnected by this time,
1799 the result was a log entry for a synchronization error with an empty
1800 string after "input=" when read() returned zero. If read() returned -1
1801 (an event I could not check), uninitialized data bytes were printed.
1802 There were reports of junk text (parts of files, etc) appearing after
1805 PH/21 Added acl_not_smtp_mime to allow for MIME scanning for non-SMTP messages.
1807 PH/22 Added support for macro redefinition, and (re)definition in between
1808 driver and ACL definitions.
1810 PH/23 The cyrus_sasl authenticator was expanding server_hostname, but then
1811 forgetting to use the resulting value; it was using the unexpanded value.
1813 PH/24 The cyrus_sasl authenticator was advertising mechanisms for which it
1814 hadn't been configured. The fix is from Juergen Kreileder, who
1815 understands it better than I do:
1817 "Here's what I see happening with three configured cyrus_sasl
1818 authenticators configured (plain, login, cram-md5):
1820 On startup auth_cyrus_sasl_init() gets called for each of these.
1821 This means three calls to sasl_listmech() without a specified mech_list.
1822 => SASL tests which mechs of all available mechs actually work
1823 => three warnings about OTP not working
1824 => the returned list contains: plain, login, cram-md5, digest-md5, ...
1826 With the patch, sasl_listmech() also gets called three times. But now
1827 SASL's mech_list option is set to the server_mech specified in the the
1828 authenticator. Or in other words, the answer from sasl_listmech()
1829 gets limited to just the mech you're testing for (which is different
1831 => the return list contains just 'plain' or 'login', 'cram-md5' or
1832 nothing depending on the value of ob->server_mech.
1834 I've just tested the patch: Authentication still works fine,
1835 unavailable mechs specified in the exim configuration are still
1836 caught, and the auth.log warnings about OTP are gone."
1838 PH/25 When debugging is enabled, the contents of the command line are added
1839 to the debugging output, even when log_selector=+arguments is not
1842 PH/26 Change scripts/os-type so that when "uname -s" returns just "GNU", the
1843 answer is "GNU", and only if the return is "GNU/something" is the answer
1846 PH/27 $acl_verify_message is now set immediately after the failure of a
1847 verification in an ACL, and so is available in subsequent modifiers. In
1848 particular, the message can be preserved by coding like this:
1850 warn !verify = sender
1851 set acl_m0 = $acl_verify_message
1853 Previously, $acl_verify_message was set only while expanding "message"
1854 and "log_message" when a very denied access.
1856 PH/28 Modified OS/os.c-Linux with
1858 -#ifndef OS_LOAD_AVERAGE
1859 +#if !defined(OS_LOAD_AVERAGE) && defined(__linux__)
1861 to make Exim compile on kfreebsd-gnu. (I'm totally confused about the
1862 nomenclature these days.)
1864 PH/29 Installed patch from the Sieve maintainer that adds the options
1865 sieve_useraddress and sieve_subaddress to the redirect router.
1867 PH/30 In these circumstances:
1868 . Two addresses routed to the same list of hosts;
1869 . First host does not offer TLS;
1870 . First host accepts first address;
1871 . First host gives temporary error to second address;
1872 . Second host offers TLS and a TLS session is established;
1873 . Second host accepts second address.
1874 Exim incorrectly logged both deliveries with the TLS parameters (cipher
1875 and peerdn, if requested) that were in fact used only for the second
1878 PH/31 When doing a callout as part of verifying an address, Exim was not paying
1879 attention to any local part prefix or suffix that was matched by the
1880 router that accepted the address. It now behaves in the same way as it
1881 does for delivery: the affixes are removed from the local part unless
1882 rcpt_include_affixes is set on the transport.
1884 PH/32 Add the sender address, as F=<...>, to the log line when logging a
1885 timeout during the DATA phase of an incoming message.
1887 PH/33 Sieve envelope tests were broken for match types other than :is. I have
1888 applied a patch sanctioned by the Sieve maintainer.
1890 PH/34 Change 4.50/80 broke Exim in that it could no longer handle cases where
1891 the uid or gid is negative. A case of a negative gid caused this to be
1892 noticed. The fix allows for either to be negative.
1894 PH/35 ACL_WHERE_MIME is now declared unconditionally, to avoid too much code
1895 clutter, but the tables that are indexed by ACL_WHERE_xxx values had been
1898 PH/36 The change PH/12 above was broken. Fixed it.
1900 PH/37 Exim used to check for duplicate addresses in the middle of routing, on
1901 the grounds that routing the same address twice would always produce the
1902 same answer. This might have been true once, but it is certainly no
1903 longer true now. Routing a child address may depend on the previous
1904 routing that produced that child. Some complicated redirection strategies
1905 went wrong when messages had multiple recipients, and made Exim's
1906 behaviour dependent on the order in which the addresses were given.
1908 I have moved the duplicate checking until after the routing is complete.
1909 Exim scans the addresses that are assigned to local and remote
1910 transports, and removes any duplicates. This means that more work will be
1911 done, as duplicates will always all be routed, but duplicates are
1912 presumably rare, so I don't expect this is of any significance.
1914 For deliveries to pipes, files, and autoreplies, the duplicate checking
1915 still happens during the routing process, since they are not going to be
1918 PH/38 Installed a patch from Ian Freislich, with the agreement of Tom Kistner.
1919 It corrects a timeout issue with spamd. This is Ian's comment: "The
1920 background is that sometimes spamd either never reads data from a
1921 connection it has accepted, or it never writes response data. The exiscan
1922 spam.[ch] uses a 3600 second timeout on spamd socket reads, further, it
1923 blindly assumes that writes won't block so it may never time out."
1925 PH/39 Allow G after quota size as well as K and M.
1927 PH/40 The value set for $authenticated_id in an authenticator may not contain
1928 binary zeroes or newlines because the value is written to log lines and
1929 to spool files. There was no check on this. Now the value is run through
1930 the string_printing() function so that such characters are converted to
1931 printable escape sequences.
1933 PH/41 $message_linecount is a new variable that contains the total number of
1934 lines in the message. Compare $body_linecount, which is the count for the
1937 PH/42 Exim no longer gives details of delivery errors for specific addresses in
1938 bounce and delay warning messages, except in certain special cases, which
1941 (a) An SMTP error message from a remote host;
1942 (b) A message specified in a :fail: redirection;
1943 (c) A message specified in a "fail" command in a system filter;
1944 (d) A message specified in a FAIL return from the queryprogram router;
1945 (e) A message specified by the cannot_route_message router option.
1947 In these cases only, Exim does include the error details in bounce and
1948 warning messages. There are also a few cases where bland messages such
1949 as "unrouteable address" or "local delivery error" are given.
1951 PH/43 $value is now also set for the "else" part of a ${run expansion.
1953 PH/44 Applied patch from the Sieve maintainer: "The vacation draft is still
1954 being worked on, but at least Exim now implements the latest version to
1957 PH/45 In a pipe transport, although a timeout while waiting for the pipe
1958 process to complete was treated as a delivery failure, a timeout while
1959 writing the message to the pipe was logged, but erroneously treated as a
1960 successful delivery. Such timeouts include transport filter timeouts. For
1961 consistency with the overall process timeout, these timeouts are now
1962 treated as errors, giving rise to delivery failures by default. However,
1963 there is now a new Boolean option for the pipe transport called
1964 timeout_defer, which, if set TRUE, converts the failures into defers for
1965 both kinds of timeout. A transport filter timeout is now identified in
1968 PH/46 The "scripts/Configure-config.h" script calls "make" at one point. On
1969 systems where "make" and "gmake" are different, calling "gmake" at top
1970 level broke things. I've arranged for the value of $(MAKE) to be passed
1971 from the Makefile to this script so that it can call the same version of
1975 A note about Exim versions 4.44 and 4.50
1976 ----------------------------------------
1978 Exim 4.50 was meant to be the next release after 4.43. It contains a lot of
1979 changes of various kinds. As a consequence, a big documentation update was
1980 needed. This delayed the release for rather longer than seemed good, especially
1981 in the light of a couple of (minor) security issues. Therefore, the changes
1982 that fixed bugs were backported into 4.43, to create a 4.44 maintenance
1983 release. So 4.44 and 4.50 are in effect two different branches that both start
1986 I have left the 4.50 change log unchanged; it contains all the changes since
1987 4.43. The change log for 4.44 is below; many of its items are identical to
1988 those for 4.50. This seems to be the most sensible way to preserve the
1989 historical information.
1995 1. Minor wording change to the doc/README.SIEVE file.
1997 2. Change 4.43/35 introduced a bug: if quota_filecount was set, the
1998 computation of the current number of files was incorrect.
2000 3. Closing a stable door: arrange to panic-die if setitimer() ever fails. The
2001 bug fixed in 4.43/37 would have been diagnosed quickly if this had been in
2004 4. Give more explanation in the error message when the command for a transport
2005 filter fails to execute.
2007 5. There are several places where Exim runs a non-Exim command in a
2008 subprocess. The SIGUSR1 signal should be disabled for these processes. This
2009 was being done only for the command run by the queryprogram router. It is
2010 now done for all such subprocesses. The other cases are: ${run, transport
2011 filters, and the commands run by the lmtp and pipe transports.
2013 6. Added CONFIGURE_GROUP build-time option.
2015 7. Some older OS have a limit of 256 on the maximum number of file
2016 descriptors. Exim was using setrlimit() to set 1000 as a large value
2017 unlikely to be exceeded. Change 4.43/17 caused a lot of logging on these
2018 systems. I've change it so that if it can't get 1000, it tries for 256.
2020 8. "control=submission" was allowed, but had no effect, in a DATA ACL. This
2021 was an oversight, and furthermore, ever since the addition of extra
2022 controls (e.g. 4.43/32), the checks on when to allow different forms of
2023 "control" were broken. There should now be diagnostics for all cases when a
2024 control that does not make sense is encountered.
2026 9. Added the /retain_sender option to "control=submission".
2028 10. $recipients is now available in the predata ACL (oversight).
2030 11. Tidy the search cache before the fork to do a delivery from a message
2031 received from the command line. Otherwise the child will trigger a lookup
2032 failure and thereby defer the delivery if it tries to use (for example) a
2033 cached ldap connection that the parent has called unbind on.
2035 12. If verify=recipient was followed by verify=sender in a RCPT ACL, the value
2036 of $address_data from the recipient verification was clobbered by the
2037 sender verification.
2039 13. The value of address_data from a sender verification is now available in
2040 $sender_address_data in subsequent conditions in the ACL statement.
2042 14. Added forbid_sieve_filter and forbid_exim_filter to the redirect router.
2044 15. Added a new option "connect=<time>" to callout options, to set a different
2047 16. If FIXED_NEVER_USERS was defined, but empty, Exim was assuming the uid 0
2048 was its contents. (It was OK if the option was not defined at all.)
2050 17. A "Completed" log line is now written for messages that are removed from
2051 the spool by the -Mrm option.
2053 18. New variables $sender_verify_failure and $recipient_verify_failure contain
2054 information about exactly what failed.
2056 19. Added -dd to debug only the daemon process.
2058 20. Incorporated Michael Haardt's patch to ldap.c for improving the way it
2059 handles timeouts, both on the server side and network timeouts. Renamed the
2060 CONNECT parameter as NETTIMEOUT (but kept the old name for compatibility).
2062 21. The rare case of EHLO->STARTTLS->HELO was setting the protocol to "smtp".
2063 It is now set to "smtps".
2065 22. $host_address is now set to the target address during the checking of
2066 ignore_target_hosts.
2068 23. When checking ignore_target_hosts for an ipliteral router, no host name was
2069 being passed; this would have caused $sender_host_name to have been used if
2070 matching the list had actually called for a host name (not very likely,
2071 since this list is usually IP addresses). A host name is now passed as
2074 24. Changed the calls that set up the SIGCHLD handler in the daemon to use the
2075 code that specifies a non-restarting handler (typically sigaction() in
2076 modern systems) in an attempt to fix a rare and obscure crash bug.
2078 25. Narrowed the window for a race in the daemon that could cause it to ignore
2079 SIGCHLD signals. This is not a major problem, because they are used only to
2080 wake it up if nothing else does.
2082 26. A malformed maildirsize file could cause Exim to calculate negative values
2083 for the mailbox size or file count. Odd effects could occur as a result.
2084 The maildirsize information is now recalculated if the size or filecount
2087 27. Added HAVE_SYS_STATVFS_H to the os.h file for Linux, as it has had this
2088 support for a long time. Removed HAVE_SYS_VFS_H.
2090 28. Installed the latest version of exipick from John Jetmore.
2092 29. In an address list, if the pattern was not a regular expression, an empty
2093 subject address (from a bounce message) matched only if the pattern was an
2094 empty string. Non-empty patterns were not even tested. This was the wrong
2095 because it is perfectly reasonable to use an empty address as part of a
2096 database query. An empty address is now tested by patterns that are
2097 lookups. However, all the other forms of pattern expect the subject to
2098 contain a local part and a domain, and therefore, for them, an empty
2099 address still always fails if the pattern is not itself empty.
2101 30. Exim went into a mad DNS loop when attempting to do a callout where the
2102 host was specified on an smtp transport, and looking it up yielded more
2103 than one IP address.
2105 31. Re-factored the code for checking spool and log partition space into a
2106 function that finds that data and another that does the check. The former
2107 is then used to implement four new variables: $spool_space, $log_space,
2108 $spool_inodes, and $log_inodes.
2110 32. The RFC2047 encoding function was originally intended for short strings
2111 such as real names; it was not keeping to the 75-character limit for
2112 encoded words that the RFC imposes. It now respects the limit, and
2113 generates multiple encoded words if necessary. To be on the safe side, I
2114 have increased the buffer size for the ${rfc2047: expansion operator from
2117 33. It is now permitted to omit both strings after an "if" condition; if the
2118 condition is true, the result is "true". As before, when the second string
2119 is omitted, a false condition yields an empty string. This makes it less
2120 cumbersome to write custom ACL and router conditions.
2122 34. Failure to deliver a bounce message always caused it to be frozen, even if
2123 there was an errors_to setting on the router. The errors_to setting is now
2126 35. If an IPv6 address is given for -bh or -bhc, it is now converted to the
2127 canonical form (fully expanded) before being placed in
2128 $sender_host_address.
2130 36. The table in the code that translates DNS record types into text (T_A to
2131 "A" for instance) was missing entries for NS and CNAME. It is just possible
2132 that this could have caused confusion if both these types were looked up
2133 for the same domain, because the text type is used as part of Exim's
2134 per-process caching. But the chance of anyone hitting this buglet seems
2137 37. The dnsdb lookup has been extended in a number of ways.
2139 (1) There is a new type, "zns", which walks up the domain tree until it
2140 finds some nameserver records. It should be used with care.
2142 (2) There is a new type, "mxh", which is like "mx" except that it returns
2143 just the host names, not the priorities.
2145 (3) It is now possible to give a list of domains (or IP addresses) to be
2146 looked up. The behaviour when one of the lookups defers can be
2147 controlled by a keyword.
2149 (4) It is now possible to specify the separator character for use when
2150 multiple records are returned.
2152 38. The dnslists ACL condition has been extended: it is now possible to supply
2153 a list of IP addresses and/or domains to be looked up in a particular DNS
2156 39. Added log_selector=+queue_time_overall.
2158 40. When running the queue in the test harness, wait just a tad after forking a
2159 delivery process, to get repeatability of debugging output.
2161 41. Include certificate and key file names in error message when GnuTLS fails
2162 to set them up, because the GnuTLS error message doesn't include the name
2163 of the failing file when there is a problem reading it.
2165 42. Allow both -bf and -bF in the same test run.
2167 43. Did the same fix as 41 above for OpenSSL, which had the same infelicity.
2169 44. The "Exiscan patch" is now merged into the mainline Exim source.
2171 45. Sometimes the final signoff response after QUIT could fail to get
2172 transmitted in the non-TLS case. Testing !tls_active instead of tls_active
2173 < 0 before doing a fflush(). This bug looks as though it goes back to the
2174 introduction of TLS in release 3.20, but "sometimes" must have been rare
2175 because the tests only now provoked it.
2177 46. Reset the locale to "C" after calling embedded Perl, in case it was changed
2178 (this can affect the format of dates).
2180 47. exim_tidydb, when checking for the continued existence of a message for
2181 which it has found a message-specific retry record, was not finding
2182 messages that were in split spool directories. Consequently, it was
2183 deleting retry records that should have stayed in existence.
2185 48. Steve fixed some bugs in eximstats.
2187 49. The SPA authentication driver was not abandoning authentication and moving
2188 on to the next authenticator when an expansion was forced to fail,
2189 contradicting the general specification for all authenticators. Instead it
2190 was generating a temporary error. It now behaves as specified.
2192 50. The default ordering of permitted cipher suites for GnuTLS was pessimal
2193 (the order specifies the preference for clients). The order is now AES256,
2194 AES128, 3DES, ARCFOUR128.
2196 51. Small patch to Sieve code - explicitly set From: when generating an
2199 52. Exim crashed if a remote delivery caused a very long error message to be
2200 recorded - for instance if somebody sent an entire SpamAssassin report back
2201 as a large number of 550 error lines. This bug was coincidentally fixed by
2202 increasing the size of one of Exim's internal buffers (big_buffer) that
2203 happened as part of the Exiscan merge. However, to be on the safe side, I
2204 have made the code more robust (and fixed the comments that describe what
2207 53. Now that there can be additional text after "Completed" in log lines (if
2208 the queue_time_overall log selector is set), a one-byte patch to exigrep
2209 was needed to allow it to recognize "Completed" as not the last thing in
2212 54. The LDAP lookup was not handling a return of LDAP_RES_SEARCH_REFERENCE. A
2213 patch that reportedly fixes this has been added. I am not expert enough to
2214 create a test for it. This is what the patch creator wrote:
2216 "I found a little strange behaviour of ldap code when working with
2217 Windows 2003 AD Domain, where users was placed in more than one
2218 Organization Units. When I tried to give exim partial DN, the exit code
2219 of ldap_search was unknown to exim because of LDAP_RES_SEARCH_REFERENCE.
2220 But simultaneously result of request was absolutely normal ldap result,
2221 so I produce this patch..."
2223 Later: it seems that not all versions of LDAP support LDAP_RES_SEARCH_
2224 REFERENCE, so I have modified the code to exclude the patch when that macro
2227 55. Some experimental protocols are using DNS PTR records for new purposes. The
2228 keys for these records are domain names, not reversed IP addresses. The
2229 dnsdb PTR lookup now tests whether its key is an IP address. If not, it
2230 leaves it alone. Component reversal etc. now happens only for IP addresses.
2233 56. Improve error message when ldap_search() fails in OpenLDAP or Solaris LDAP.
2235 57. Double the size of the debug message buffer (to 2048) so that more of very
2236 long debug lines gets shown.
2238 58. The exicyclog utility now does better if the number of log files to keep
2239 exceeds 99. In this case, it numbers them 001, 002 ... instead of 01, 02...
2241 59. Two changes related to the smtp_active_hostname option:
2243 (1) $smtp_active_hostname is now available as a variable.
2244 (2) The default for smtp_banner uses $smtp_active_hostname instead
2245 of $primary_hostname.
2247 60. The host_aton() function is supposed to be passed a string that is known
2248 to be a valid IP address. However, in the case of IPv6 addresses, it was
2249 not checking this. This is a hostage to fortune. Exim now panics and dies
2250 if the condition is not met. A case was found where this could be provoked
2251 from a dnsdb PTR lookup with an IPv6 address that had more than 8
2252 components; fortuitously, this particular loophole had already been fixed
2253 by change 4.50/55 above.
2255 If there are any other similar loopholes, the new check in host_aton()
2256 itself should stop them being exploited. The report I received stated that
2257 data on the command line could provoke the exploit when Exim was running as
2258 exim, but did not say which command line option was involved. All I could
2259 find was the use of -be with a bad dnsdb PTR lookup, and in that case it is
2260 running as the user.
2263 61. There was a buffer overflow vulnerability in the SPA authentication code
2264 (which came originally from the Samba project). I have added a test to the
2265 spa_base64_to_bits() function which I hope fixes it.
2268 62. Configuration update for GNU/Hurd and variations. Updated Makefile-GNU and
2269 os.h-GNU, and added configuration files for GNUkFreeBSD and GNUkNetBSD.
2271 63. The daemon start-up calls getloadavg() while still root for those OS that
2272 need the first call to be done as root, but it missed one case: when
2273 deliver_queue_load_max is set with deliver_drop_privilege. This is
2274 necessary for the benefit of the queue runner, because there is no re-exec
2275 when deliver_drop_privilege is set.
2277 64. A call to exiwhat cut short delays set up by "delay" modifiers in ACLs.
2278 This has been fixed.
2280 65. Caching of lookup data for "hosts =" ACL conditions, when a named host list
2281 was in use, was not putting the data itself into the right store pool;
2282 consequently, it could be overwritten for a subsequent message in the same
2283 SMTP connection. (Fix 4.40/11 dealt with the non-cache case, but overlooked
2286 66. Added hosts_max_try_hardlimit to the smtp transport, default 50.
2288 67. The string_is_ip_address() function returns 0, 4, or 6, for "no an IP
2289 address", "IPv4 address", and "IPv6 address", respectively. Some calls of
2290 the function were treating the return as a boolean value, which happened to
2291 work because 0=false and not-0=true, but is not correct code.
2293 68. The host_aton() function was not handling scoped IPv6 addresses (those
2294 with, for example, "%eth0" on the end) correctly.
2296 69. Fixed some compiler warnings in acl.c for the bitmaps specified with
2297 negated items (that is, ~something) in unsigned ints. Some compilers
2298 apparently mutter when there is no cast.
2300 70. If an address verification called from an ACL failed, and did not produce a
2301 user-specific message (i.e. there was only a "system" message), nothing was
2302 put in $acl_verify_message. In this situation, it now puts the system
2305 71. Change 4.23/11 added synchronization checking at the start of an SMTP
2306 session; change 4.31/43 added the unwanted input to the log line - except
2307 that it did not do this in the start of session case. It now does.
2309 72. After a timeout in a callout SMTP session, Exim still sent a QUIT command.
2310 This is wrong and can cause the other end to generate a synchronization
2311 error if it is another Exim or anything else that does the synchronization
2312 check. A QUIT command is no longer sent after a timeout.
2314 73. $host_lookup_deferred has been added, to make it easier to detect DEFERs
2315 during host lookups.
2317 74. The defer_ok option of callout verification was not working if it was used
2318 when verifying addresses in header lines, that is, for this case:
2320 verify = header_sender/callout=defer_ok
2322 75. A backgrounded daemon closed stdin/stdout/stderr on entry; this meant that
2323 those file descriptors could be used for SMTP connections. If anything
2324 wrote to stderr (the example that came up was "warn" in embedded Perl), it
2325 could be sent to the SMTP client, causing chaos. The daemon now opens
2326 stdin, stdout, and stderr to /dev/null when it puts itself into the
2329 76. Arrange for output from Perl's "warn" command to be written to Exim's main
2330 log by default. The user can override this with suitable Perl magic.
2332 77. The use of log_message on a "discard" ACL verb, which is supposed to add to
2333 the log message when discard triggers, was not working for the DATA ACL or
2334 for the non-SMTP ACL.
2336 78. Error message wording change in sieve.c.
2338 79. If smtp_accept_max_per_host was set, the number of connections could be
2339 restricted to fewer than expected, because the daemon was trying to set up
2340 a new connection before checking whether the processes handling previous
2341 connections had finished. The check for completed processes is now done
2342 earlier. On busy systems, this bug wouldn't be noticed because something
2343 else would have woken the daemon, and it would have reaped the completed
2346 80. If a message was submitted locally by a user whose login name contained one
2347 or more spaces (ugh!), the spool file that Exim wrote was not re-readable.
2348 It caused a spool format error. I have fixed the spool reading code. A
2349 related problem was that the "from" clause in the Received: line became
2350 illegal because of the space(s). It is now covered by ${quote_local_part.
2352 81. Included the latest eximstats from Steve (adds average sizes to HTML Top
2355 82. Updated OS/Makefile-AIX as per message from Mike Meredith.
2357 83. Patch from Sieve maintainer to fix unterminated string problem in
2358 "vacation" handling.
2360 84. Some minor changes to the Linux configuration files to help with other
2361 OS variants using glibc.
2363 85. One more patch for Sieve to update vacation handling to latest spec.
2366 ----------------------------------------------------
2367 See the note above about the 4.44 and 4.50 releases.
2368 ----------------------------------------------------
2374 1. Change 4.43/35 introduced a bug that caused file counts to be
2375 incorrectly computed when quota_filecount was set in an appendfile
2378 2. Closing a stable door: arrange to panic-die if setitimer() ever fails. The
2379 bug fixed in 4.43/37 would have been diagnosed quickly if this had been in
2382 3. Give more explanation in the error message when the command for a transport
2383 filter fails to execute.
2385 4. There are several places where Exim runs a non-Exim command in a
2386 subprocess. The SIGUSR1 signal should be disabled for these processes. This
2387 was being done only for the command run by the queryprogram router. It is
2388 now done for all such subprocesses. The other cases are: ${run, transport
2389 filters, and the commands run by the lmtp and pipe transports.
2391 5. Some older OS have a limit of 256 on the maximum number of file
2392 descriptors. Exim was using setrlimit() to set 1000 as a large value
2393 unlikely to be exceeded. Change 4.43/17 caused a lot of logging on these
2394 systems. I've change it so that if it can't get 1000, it tries for 256.
2396 6. "control=submission" was allowed, but had no effect, in a DATA ACL. This
2397 was an oversight, and furthermore, ever since the addition of extra
2398 controls (e.g. 4.43/32), the checks on when to allow different forms of
2399 "control" were broken. There should now be diagnostics for all cases when a
2400 control that does not make sense is encountered.
2402 7. $recipients is now available in the predata ACL (oversight).
2404 8. Tidy the search cache before the fork to do a delivery from a message
2405 received from the command line. Otherwise the child will trigger a lookup
2406 failure and thereby defer the delivery if it tries to use (for example) a
2407 cached ldap connection that the parent has called unbind on.
2409 9. If verify=recipient was followed by verify=sender in a RCPT ACL, the value
2410 of $address_data from the recipient verification was clobbered by the
2411 sender verification.
2413 10. If FIXED_NEVER_USERS was defined, but empty, Exim was assuming the uid 0
2414 was its contents. (It was OK if the option was not defined at all.)
2416 11. A "Completed" log line is now written for messages that are removed from
2417 the spool by the -Mrm option.
2419 12. $host_address is now set to the target address during the checking of
2420 ignore_target_hosts.
2422 13. When checking ignore_target_hosts for an ipliteral router, no host name was
2423 being passed; this would have caused $sender_host_name to have been used if
2424 matching the list had actually called for a host name (not very likely,
2425 since this list is usually IP addresses). A host name is now passed as
2428 14. Changed the calls that set up the SIGCHLD handler in the daemon to use the
2429 code that specifies a non-restarting handler (typically sigaction() in
2430 modern systems) in an attempt to fix a rare and obscure crash bug.
2432 15. Narrowed the window for a race in the daemon that could cause it to ignore
2433 SIGCHLD signals. This is not a major problem, because they are used only to
2434 wake it up if nothing else does.
2436 16. A malformed maildirsize file could cause Exim to calculate negative values
2437 for the mailbox size or file count. Odd effects could occur as a result.
2438 The maildirsize information is now recalculated if the size or filecount
2441 17. Added HAVE_SYS_STATVFS_H to the os.h file for Linux, as it has had this
2442 support for a long time. Removed HAVE_SYS_VFS_H.
2444 18. Updated exipick to current release from John Jetmore.
2446 19. Allow an empty sender to be matched against a lookup in an address list.
2447 Previously the only cases considered were a regular expression, or an
2450 20. Exim went into a mad DNS lookup loop when doing a callout where the
2451 host was specified on the transport, if the DNS lookup yielded more than
2454 21. The RFC2047 encoding function was originally intended for short strings
2455 such as real names; it was not keeping to the 75-character limit for
2456 encoded words that the RFC imposes. It now respects the limit, and
2457 generates multiple encoded words if necessary. To be on the safe side, I
2458 have increased the buffer size for the ${rfc2047: expansion operator from
2461 22. Failure to deliver a bounce message always caused it to be frozen, even if
2462 there was an errors_to setting on the router. The errors_to setting is now
2465 23. If an IPv6 address is given for -bh or -bhc, it is now converted to the
2466 canonical form (fully expanded) before being placed in
2467 $sender_host_address.
2469 24. Updated eximstats to version 1.33
2471 25. Include certificate and key file names in error message when GnuTLS fails
2472 to set them up, because the GnuTLS error message doesn't include the name
2473 of the failing file when there is a problem reading it.
2475 26. Expand error message when OpenSSL has problems setting up cert/key files.
2478 27. Reset the locale to "C" after calling embedded Perl, in case it was changed
2479 (this can affect the format of dates).
2481 28. exim_tidydb, when checking for the continued existence of a message for
2482 which it has found a message-specific retry record, was not finding
2483 messages that were in split spool directories. Consequently, it was
2484 deleting retry records that should have stayed in existence.
2486 29. eximstats updated to version 1.35
2487 1.34 - allow eximstats to parse syslog lines as well as mainlog lines
2488 1.35 - bugfix such that pie charts by volume are generated correctly
2490 30. The SPA authentication driver was not abandoning authentication and moving
2491 on to the next authenticator when an expansion was forced to fail,
2492 contradicting the general specification for all authenticators. Instead it
2493 was generating a temporary error. It now behaves as specified.
2495 31. The default ordering of permitted cipher suites for GnuTLS was pessimal
2496 (the order specifies the preference for clients). The order is now AES256,
2497 AES128, 3DES, ARCFOUR128.
2499 31. Small patch to Sieve code - explicitly set From: when generating an
2502 32. Exim crashed if a remote delivery caused a very long error message to be
2503 recorded - for instance if somebody sent an entire SpamAssassin report back
2504 as a large number of 550 error lines. This bug was coincidentally fixed by
2505 increasing the size of one of Exim's internal buffers (big_buffer) that
2506 happened as part of the Exiscan merge. However, to be on the safe side, I
2507 have made the code more robust (and fixed the comments that describe what
2510 33. Some experimental protocols are using DNS PTR records for new purposes. The
2511 keys for these records are domain names, not reversed IP addresses. The
2512 dnsdb PTR lookup now tests whether its key is an IP address. If not, it
2513 leaves it alone. Component reversal etc. now happens only for IP addresses.
2516 34. The host_aton() function is supposed to be passed a string that is known
2517 to be a valid IP address. However, in the case of IPv6 addresses, it was
2518 not checking this. This is a hostage to fortune. Exim now panics and dies
2519 if the condition is not met. A case was found where this could be provoked
2520 from a dnsdb PTR lookup with an IPv6 address that had more than 8
2521 components; fortuitously, this particular loophole had already been fixed
2522 by change 4.50/55 or 4.44/33 above.
2524 If there are any other similar loopholes, the new check in host_aton()
2525 itself should stop them being exploited. The report I received stated that
2526 data on the command line could provoke the exploit when Exim was running as
2527 exim, but did not say which command line option was involved. All I could
2528 find was the use of -be with a bad dnsdb PTR lookup, and in that case it is
2529 running as the user.
2532 35. There was a buffer overflow vulnerability in the SPA authentication code
2533 (which came originally from the Samba project). I have added a test to the
2534 spa_base64_to_bits() function which I hope fixes it.
2537 36. The daemon start-up calls getloadavg() while still root for those OS that
2538 need the first call to be done as root, but it missed one case: when
2539 deliver_queue_load_max is set with deliver_drop_privilege. This is
2540 necessary for the benefit of the queue runner, because there is no re-exec
2541 when deliver_drop_privilege is set.
2543 37. Caching of lookup data for "hosts =" ACL conditions, when a named host list
2544 was in use, was not putting the data itself into the right store pool;
2545 consequently, it could be overwritten for a subsequent message in the same
2546 SMTP connection. (Fix 4.40/11 dealt with the non-cache case, but overlooked
2549 38. Sometimes the final signoff response after QUIT could fail to get
2550 transmitted in the non-TLS case. Testing !tls_active instead of tls_active
2551 < 0 before doing a fflush(). This bug looks as though it goes back to the
2552 introduction of TLS in release 3.20, but "sometimes" must have been rare
2553 because the tests only now provoked it.
2559 1. Fixed a longstanding but relatively impotent bug: a long time ago, before
2560 PIPELINING, the function smtp_write_command() used to return TRUE or FALSE.
2561 Now it returns an integer. A number of calls were still expecting a T/F
2562 return. Fortuitously, in all cases, the tests worked in OK situations,
2563 which is the norm. However, things would have gone wrong on any write
2564 failures on the smtp file descriptor. This function is used when sending
2565 messages over SMTP and also when doing verify callouts.
2567 2. When Exim is called to do synchronous delivery of a locally submitted
2568 message (the -odf or -odi options), it no longer closes stderr before doing
2571 3. Implemented the mua_wrapper option.
2573 4. Implemented mx_fail_domains and srv_fail_domains for the dnslookup router.
2575 5. Implemented the functions header_remove(), header_testname(),
2576 header_add_at_position(), and receive_remove_recipient(), and exported them
2579 6. If an ACL "warn" statement specified the addition of headers, Exim already
2580 inserted X-ACL-Warn: at the start if there was no header name. However, it
2581 was not making this test for the second and subsequent header lines if
2582 there were newlines in the string. This meant that an invalid header could
2583 be inserted if Exim was badly configured.
2585 7. Allow an ACL "warn" statement to add header lines at the start or after all
2586 the Received: headers, as well as at the end.
2588 8. Added the rcpt_4xx retry error code.
2590 9. Added postmaster_mailfrom=xxx to callout verification option.
2592 10. Added mailfrom=xxxx to the callout verification option, for verify=
2595 11. ${substr_1_:xxxx} and ${substr__3:xxxx} are now diagnosed as syntax errors
2596 (they previously behaved as ${substr_1_0:xxxx} and ${substr:_0_3:xxxx}).
2598 12. Inserted some casts to stop certain compilers warning when using pointer
2599 differences as field lengths or precisions in printf-type calls (mostly
2600 affecting debugging statements).
2602 13. Added optional readline() support for -be (dynamically loaded).
2604 14. Obscure bug fix: if a message error (e.g. 4xx to MAIL) happened within the
2605 same clock tick as a message's arrival, so that its received time was the
2606 same as the "first fail" time on the retry record, and that message
2607 remained on the queue past the ultimate address timeout, every queue runner
2608 would try a delivery (because it was past the ultimate address timeout) but
2609 after another failure, the ultimate address timeout, which should have then
2610 bounced the address, did not kick in. This was a "< instead of <=" error;
2611 in most cases the first failure would have been in the next clock tick
2612 after the received time, and all would be well.
2614 15. The special items beginning with @ in domain lists (e.g. @mx_any) were not
2615 being recognized when the domain list was tested by the match_domain
2616 condition in an expansion string.
2618 16. Added the ${str2b64: operator.
2620 17. Exim was always calling setrlimit() to set a large limit for the number of
2621 processes, without checking whether the existing limit was already
2622 adequate. (It did check for the limit on file descriptors.) Furthermore,
2623 errors from getrlimit() and setrlimit() were being ignored. Now they are
2624 logged to the main and panic logs, but Exim does carry on, to try to do its
2625 job under whatever limits there are.
2627 18. Imported PCRE 5.0.
2629 19. Trivial typo in log message " temporarily refused connection" (the leading
2632 20. If the log selector return_path_on_delivery was set and an address was
2633 redirected to /dev/null, the delivery process crashed because it assumed
2634 that a return path would always be set for a "successful" delivery. In this
2635 case, the whole delivery is bypassed as an optimization, and therefore no
2638 21. Internal re-arrangement: the function for sending a challenge and reading
2639 a response while authentication was assuming a zero-terminated challenge
2640 string. It's now changed to take a pointer and a length, to allow for
2641 binary data in such strings.
2643 22. Added the cyrus_sasl authenticator (code supplied by MBM).
2645 23. Exim was not respecting finduser_retries when seeking the login of the
2646 uid under which it was called; it was always trying 10 times. (The default
2647 setting of finduser_retries is zero.) Also, it was sleeping after the final
2648 failure, which is pointless.
2650 24. Implemented tls_on_connect_ports.
2652 25. Implemented acl_smtp_predata.
2654 26. If the domain in control=submission is set empty, Exim assumes that the
2655 authenticated id is a complete email address when it generates From: or
2656 Sender: header lines.
2658 27. Added "#define SOCKLEN_T int" to OS/os.h-SCO and OS/os.h-SCO_SV. Also added
2659 definitions to OS/Makefile-SCO and OS/Makefile-SCO_SV that put basename,
2660 chown and chgrp in /bin and hostname in /usr/bin.
2662 28. Exim was keeping the "process log" file open after each use, just as it
2663 does for the main log. This opens the possibility of it remaining open for
2664 long periods when the USR1 signal hits a daemon. Occasional processlog
2665 errors were reported, that could have been caused by this. Anyway, it seems
2666 much more sensible not to leave this file open at all, so that is what now
2669 29. The long-running daemon process does not normally write to the log once it
2670 has entered its main loop, and it closes the log before doing so. This is
2671 so that log files can straightforwardly be renamed and moved. However,
2672 there are a couple of unusual error situations where the daemon does write
2673 log entries, and I had neglected to close the log afterwards.
2675 30. The text of an SMTP error response that was received during a remote
2676 delivery was being truncated at 512 bytes. This is too short for some of
2677 the long messages that one sometimes sees. I've increased the limit to
2680 31. It is now possible to make retry rules that apply only when a message has a
2681 specific sender, in particular, an empty sender.
2683 32. Added "control = enforce_sync" and "control = no_enforce_sync". This makes
2684 it possible to be selective about when SMTP synchronization is enforced.
2686 33. Added "control = caseful_local_part" and "control = "caselower_local_part".
2688 32. Implemented hosts_connection_nolog.
2690 33. Added an ACL for QUIT.
2692 34. Setting "delay_warning=" to disable warnings was not working; it gave a
2695 35. Added mailbox_size and mailbox_filecount to appendfile.
2697 36. Added control = no_multiline_responses to ACLs.
2699 37. There was a bug in the logic of the code that waits for the clock to tick
2700 in the case where the clock went backwards by a substantial amount such
2701 that the microsecond fraction of "now" was more than the microsecond
2702 fraction of "then" (but the whole seconds number was less).
2704 38. Added support for the libradius Radius client library this is found on
2705 FreeBSD (previously only the radiusclient library was supported).
2711 1. When certain lookups returned multiple values in the form name=value, the
2712 quoting of the values was not always being done properly. Specifically:
2713 (a) If the value started with a double quote, but contained no whitespace,
2715 (b) If the value contained whitespace other than a space character (i.e.
2716 tabs or newlines or carriage returns) it was not quoted.
2717 This fix has been applied to the mysql and pgsql lookups by writing a
2718 separate quoting function and calling it from the lookup code. The fix
2719 should probably also be applied to nisplus, ibase and oracle lookups, but
2720 since I cannot test any of those, I have not disturbed their existing code.
2722 2. A hit in the callout cache for a specific address caused a log line with no
2723 reason for rejecting RCPT. Now it says "Previous (cached) callout
2724 verification failure".
2726 3. There was an off-by-one bug in the queryprogram router. An over-long
2727 return line was truncated at 256 instead of 255 characters, thereby
2728 overflowing its buffer with the terminating zero. As well as fixing this, I
2729 have increased the buffer size to 1024 (and made a note to document this).
2731 4. If an interrupt, such as the USR1 signal that is send by exiwhat, arrives
2732 when Exim is waiting for an SMTP response from a remote server, Exim
2733 restarts its select() call on the socket, thereby resetting its timeout.
2734 This is not a problem when such interrupts are rare. Somebody set up a cron
2735 job to run exiwhat every 2 minutes, which is less than the normal select()
2736 timeout (5 or 10 minutes). This meant that the select() timeout never
2737 kicked in because it was always reset. I have fixed this by comparing the
2738 time when an interrupt arrives with the time at the start of the first call
2739 to select(). If more time than the timeout has elapsed, the interrupt is
2740 treated as a timeout.
2742 5. Some internal re-factoring in preparation for the addition of Sieve
2743 extensions (by MH). In particular, the "personal" test is moved to a
2744 separate function, and given an option for scanning Cc: and Bcc: (which is
2745 not set for Exim filters).
2747 6. When Exim created an email address using the login of the caller as the
2748 local part (e.g. when creating a From: or Sender: header line), it was not
2749 quoting the local part when it contained special characters such as @.
2751 7. Installed new OpenBSD configuration files.
2753 8. Reworded some messages for syntax errors in "and" and "or" conditions to
2754 try to make them clearer.
2756 9. Callout options, other than the timeout value, were being ignored when
2757 verifying sender addresses in header lines. For example, when using
2759 verify = header_sender/callout=no_cache
2761 the cache was (incorrectly) being used.
2763 10. Added a missing instance of ${EXE} to the exim_install script; this affects
2764 only the Cygwin environment.
2766 11. When return_path_on_delivery was set as a log selector, if different remote
2767 addresses in the same message used different return paths and parallel
2768 remote delivery occurred, the wrong values would sometimes be logged.
2769 (Whenever a remote delivery process finished, the return path value from
2770 the most recently started remote delivery process was logged.)
2772 12. RFC 3848 specifies standard names for the "with" phrase in Received: header
2773 lines when AUTH and/or TLS are in use. This is the "received protocol"
2774 field. Exim used to use "asmtp" for authenticated SMTP, without any
2775 indication (in the protocol name) for TLS use. Now it follows the RFC and
2776 uses "esmtpa" if the connection is authenticated, "esmtps" if it is
2777 encrypted, and "esmtpsa" if it is both encrypted and authenticated. These
2778 names appear in log lines as well as in Received: header lines.
2780 13. Installed MH's patches for Sieve to add the "copy" and "vacation"
2781 extensions, and comparison tests, and to fix some bugs.
2783 14. Changes to the "personal" filter test:
2785 (1) The test was buggy in that it was just doing the equivalent of
2786 "contains" tests on header lines. For example, if a user's address was
2787 anne@some.where, the "personal" test would incorrectly be true for
2789 To: susanne@some.where
2791 This test is now done by extracting each address from the header in turn,
2792 and checking the entire address. Other tests that are part of "personal"
2793 are now done using regular expressions (for example, to check local parts
2794 of addresses in From: header lines).
2796 (2) The list of non-personal local parts in From: addresses has been
2797 extended to include "listserv", "majordomo", "*-request", and "owner-*",
2798 taken from the Sieve specification recommendations.
2800 (3) If the message contains any header line starting with "List-" it is
2801 treated as non-personal.
2803 (4) The test for "circular" in the Subject: header line has been removed
2804 because it now seems ill-conceived.
2806 15. Minor typos in src/EDITME comments corrected.
2808 16. Installed latest exipick from John Jetmore.
2810 17. If headers_add on a router specified a text string that was too long for
2811 string_sprintf() - that is, longer than 8192 bytes - Exim panicked. The use
2812 of string_sprintf() is now avoided.
2814 18. $message_body_size was not set (it was always zero) when running the DATA
2815 ACL and the local_scan() function.
2817 19. For the "mail" command in an Exim filter, no default was being set for
2818 the once_repeat time, causing a random time value to be used if "once" was
2819 specified. (If the value happened to be <= 0, no repeat happened.) The
2820 default is now 0s, meaning "never repeat". The "vacation" command was OK
2821 (its default is 7d). It's somewhat surprising nobody ever noticed this bug
2822 (I found it when inspecting the code).
2824 20. There is now an overall timeout for performing a callout verification. It
2825 defaults to 4 times the callout timeout, which applies to individual SMTP
2826 commands during the callout. The overall timeout applies when there is more
2827 than one host that can be tried. The timeout is checked before trying the
2828 next host. This prevents very long delays if there are a large number of
2829 hosts and all are timing out (e.g. when the network connections are timing
2830 out). The value of the overall timeout can be changed by specifying an
2831 additional sub-option for "callout", called "maxwait". For example:
2833 verify = sender/callout=5s,maxwait=20s
2835 21. Add O_APPEND to the open() call for maildirsize files (Exim already seeks
2836 to the end before writing, but this should make it even safer).
2838 22. Exim was forgetting that it had advertised PIPELINING for the second and
2839 subsequent messages on an SMTP connection. It was also not resetting its
2840 memory on STARTTLS and an internal HELO.
2842 23. When Exim logs an SMTP synchronization error within a session, it now
2843 records whether PIPELINING has been advertised or not.
2845 24. Added 3 instances of "(long int)" casts to time_t variables that were being
2846 formatted using %ld, because on OpenBSD (and perhaps others), time_t is int
2847 rather than long int.
2849 25. Installed the latest Cygwin configuration files from the Cygwin maintainer.
2851 26. Added the never_mail option to autoreply.
2857 1. A reorganization of the code in order to implement 4.40/8 caused a daemon
2858 crash if the getsockname() call failed; this can happen if a connection is
2859 closed very soon after it is established. The problem was simply in the
2860 order in which certain operations were done, causing Exim to try to write
2861 to the SMTP stream before it had set up the file descriptor. The bug has
2862 been fixed by making things happen in the correct order.
2868 1. If "drop" was used in a DATA ACL, the SMTP output buffer was not flushed
2869 before the connection was closed, thus losing the rejection response.
2871 2. Commented out the definition of SOCKLEN_T in os.h-SunOS5. It is needed for
2872 some early Solaris releases, but causes trouble in current releases where
2873 socklen_t is defined.
2875 3. When std{in,out,err} are closed, re-open them to /dev/null so that they
2878 4. Minor refactoring of os.c-Linux to avoid compiler warning when IPv6 is not
2881 5. Refactoring in expand.c to improve memory usage. Pre-allocate a block so
2882 that releasing the top of it at the end releases what was used for sub-
2883 expansions (unless the block got too big). However, discard this block if
2884 the first thing is a variable or header, so that we can use its block when
2885 it is dynamic (useful for very large $message_headers, for example).
2887 6. Lookups now cache *every* query, not just the most recent. A new, separate
2888 store pool is used for this. It can be recovered when all lookup caches are
2889 flushed. Lookups now release memory at the end of their result strings.
2890 This has involved some general refactoring of the lookup sources.
2892 7. Some code has been added to the store_xxx() functions to reduce the amount
2893 of flapping under certain conditions.
2895 8. log_incoming_interface used to affect only the <= reception log lines. Now
2896 it causes the local interface and port to be added to several more SMTP log
2897 lines, for example "SMTP connection from", and rejection lines.
2899 9. The Sieve author supplied some patches for the doc/README.SIEVE file.
2901 10. Added a conditional definition of _BSD_SOCKLEN_T to os.h-Darwin.
2903 11. If $host_data was set by virtue of a hosts lookup in an ACL, its value
2904 could be overwritten at the end of the current message (or the start of a
2905 new message if it was set in a HELO ACL). The value is now preserved for
2906 the duration of the SMTP connection.
2908 12. If a transport had a headers_rewrite setting, and a matching header line
2909 contained an unqualified address, that address was qualified, even if it
2910 did not match any rewriting rules. The underlying bug was that the values
2911 of the flags that permit the existence of unqualified sender and recipient
2912 addresses in header lines (set by {sender,recipient}_unqualified_hosts for
2913 non-local messages, and by -bnq for local messages) were not being
2914 preserved with the message after it was received.
2916 13. When Exim was logging an SMTP synchronization error, it could sometimes log
2917 "next input=" as part of the text comprising the host identity instead of
2918 the correct text. The code was using the same buffer for two different
2919 strings. However, depending on which order the printing function evaluated
2920 its arguments, the bug did not always show up. Under Linux, for example, my
2921 test suite worked just fine.
2923 14. Exigrep contained a use of Perl's "our" scoping after change 4.31/70. This
2924 doesn't work with some older versions of Perl. It has been changed to "my",
2925 which in any case is probably the better facility to use.
2927 15. A really picky compiler found some instances of statements for creating
2928 error messages that either had too many or two few arguments for the format
2931 16. The size of the buffer for calls to the DNS resolver has been increased
2932 from 1024 to 2048. A larger buffer is needed when performing PTR lookups
2933 for addresses that have a lot of PTR records. This alleviates a problem; it
2934 does not fully solve it.
2936 17. A dnsdb lookup for PTR records that receives more data than will fit in the
2937 buffer now truncates the list and logs the incident, which is the same
2938 action as happens when Exim is looking up a host name and its aliases.
2939 Previously in this situation something unpredictable would happen;
2940 sometimes it was "internal error: store_reset failed".
2942 18. If a server dropped the connection unexpectedly when an Exim client was
2943 using GnuTLS and trying to read a response, the client delivery process
2944 crashed while trying to generate an error log message.
2946 19. If a "warn" verb in an ACL added multiple headers to a message in a single
2947 string, for example:
2949 warn message = H1: something\nH2: something
2951 the text was added as a single header line from Exim's point of view
2952 though it ended up OK in the delivered message. However, searching for the
2953 second and subsequent header lines using $h_h2: did not work. This has been
2954 fixed. Similarly, if a system filter added multiple headers in this way,
2955 the routers could not see them.
2957 20. Expanded the error message when iplsearch is called with an invalid key to
2958 suggest using net-iplsearch in a host list.
2960 21. When running tests using -bh, any delays imposed by "delay" modifiers in
2961 ACLs are no longer actually imposed (and a message to that effect is
2964 22. If a "gecos" field in a passwd entry contained escaped characters, in
2965 particular, if it contained a \" sequence, Exim got it wrong when building
2966 a From: or a Sender: header from that name. A second bug also caused
2967 incorrect handling when an unquoted " was present following a character
2968 that needed quoting.
2970 23. "{crypt}" as a password encryption mechanism for a "crypteq" expansion item
2971 was not being matched caselessly.
2973 24. Arranged for all hyphens in the exim.8 source to be escaped with
2976 25. Change 16 of 4.32, which reversed 71 or 4.31 didn't quite do the job
2977 properly. Recipient callout cache records were still being keyed to include
2978 the sender, even when use_sender was set false. This led to far more
2979 callouts that were necessary. The sender is no longer included in the key
2980 when use_sender is false.
2982 26. Added "control = submission" modifier to ACLs.
2984 27. Added the ${base62d: operator to decode base 62 numbers.
2986 28. dnsdb lookups can now access SRV records.
2988 29. CONFIGURE_OWNER can be set at build time to define an alternative owner for
2989 the configuration file.
2991 30. The debug message "delivering xxxxxx-xxxxxx-xx" is now output in verbose
2992 (-v) mode. This makes the output for a verbose queue run more intelligible.
2994 31. Added a use_postmaster feature to recipient callouts.
2996 32. Added the $body_zerocount variable, containing the number of binary zero
2997 bytes in the message body.
2999 33. The time of last modification of the "new" subdirectory is now used as the
3000 "mailbox time last read" when there is a quota error for a maildir
3003 34. Added string comparison operators lt, lti, le, lei, gt, gti, ge, gei.
3005 35. Added +ignore_unknown as a special item in host lists.
3007 36. Code for decoding IPv6 addresses in host lists is now included, even if
3008 IPv6 support is not being compiled. This fixes a bug in which an IPv6
3009 address was recognized as an IP address, but was then not correctly decoded
3010 into binary, causing unexpected and incorrect effects when compared with
3017 1. Very minor rewording of debugging text in manualroute to say "list of
3018 hosts" instead of "hostlist".
3020 2. If verify=header_syntax was set, and a header line with an unqualified
3021 address (no domain) and a large number of spaces between the end of the
3022 name and the colon was received, the reception process suffered a buffer
3023 overflow, and (when I tested it) crashed. This was caused by some obsolete
3024 code that should have been removed. The fix is to remove it!
3026 3. When running in the test harness, delay a bit after writing a bounce
3027 message to get a bit more predictability in the log output.
3029 4. Added a call to search_tidyup() just before forking a reception process. In
3030 theory, someone could use a lookup in the expansion of smtp_accept_max_
3031 per_host which, without the tidyup, could leave open a database connection.
3033 5. Added the variables $recipient_data and $sender_data which get set from a
3034 lookup success in an ACL "recipients" or "senders" condition, or a router
3035 "senders" option, similar to $domain_data and $local_part_data.
3037 6. Moved the writing of debug_print from before to after the "senders" test
3040 7. Change 4.31/66 (moving the time when the Received: is generated) caused
3041 problems for message scanning, either using a data ACL, or using
3042 local_scan() because the Received: header was not generated till after they
3043 were called (in order to set the time as the time of reception completion).
3044 I have revised the way this works. The header is now generated after the
3045 body is received, but before the ACL or local_scan() are called. After they
3046 are run, the timestamp in the header is updated.
3052 1. Change 4.24/6 introduced a bug because the SIGALRM handler was disabled
3053 before starting a queue runner without re-exec. This happened only when
3054 deliver_drop_privilege was set or when the Exim user was set to root. The
3055 effect of the bug was that timeouts during subsequent deliveries caused
3056 crashes instead of being properly handled. The handler is now left at its
3057 default (and expected) setting.
3059 2. The other case in which a daemon avoids a re-exec is to deliver an incoming
3060 message, again when deliver_drop_privilege is set or Exim is run as root.
3061 The bug described in (1) was not present in this case, but the tidying up
3062 of the other signals was missing. I have made the two cases consistent.
3064 3. The ignore_target_hosts setting on a manualroute router was being ignored
3065 for hosts that were looked up using the /MX notation.
3067 4. Added /ignore=<ip list> feature to @mx_any, @mx_primary, and @mx_secondary
3070 5. Change 4.31/55 was buggy, and broke when there was a rewriting rule that
3071 operated on the sender address. After changing the $sender_address to <>
3072 for the sender address verify, Exim was re-instated it as the original
3073 (before rewriting) address, but remembering that it had rewritten it, so it
3074 wasn't rewriting it again. This bug also had the effect of breaking the
3075 sender address verification caching when the sender address was rewritten.
3077 6. The ignore_target_hosts option was being ignored by the ipliteral router.
3078 This has been changed so that if the ip literal address matches
3079 ignore_target_hosts, the router declines.
3081 7. Added expansion conditions match_domain, match_address, and match_local_
3082 part (NOT match_host).
3084 8. The placeholder for the Received: header didn't have a length field set.
3086 9. Added code to Exim itself and to exim_lock to test for a specific race
3087 condition that could lead to file corruption when using MBX delivery. The
3088 issue is with the lockfile that is created in /tmp. If this file is removed
3089 after a process has opened it but before that process has acquired a lock,
3090 there is the potential for a second process to recreate the file and also
3091 acquire a lock. This could lead to two Exim processes writing to the file
3092 at the same time. The added code performs the same test as UW imapd; it
3093 checks after acquiring the lock that its file descriptor still refers to
3094 the same named file.
3096 10. The buffer for building added header lines was of fixed size, 8192 bytes.
3097 It is now parameterized by HEADER_ADD_BUFFER_SIZE and this can be adjusted
3100 11. Added the smtp_active_hostname option. If used, this will typically be made
3101 to depend on the incoming interface address. Because $interface_address is
3102 not set up until the daemon has forked a reception process, error responses
3103 that can happen earlier (such as "too many connections") no longer contain
3106 12. If an expansion in a condition on a "warn" statement fails because a lookup
3107 defers, the "warn" statement is abandoned, and the next ACL statement is
3108 processed. Previously this caused the whole ACL to be aborted.
3110 13. Added the iplsearch lookup type.
3112 14. Added ident_timeout as a log selector.
3114 15. Added tls_certificate_verified as a log selector.
3116 16. Added a global option tls_require_ciphers (compare the smtp transport
3117 option of the same name). This controls incoming TLS connections.
3119 17. I finally figured out how to make tls_require_ciphers do a similar thing
3120 in GNUtls to what it does in OpenSSL, that is, set up an appropriate list
3121 before starting the TLS session.
3123 18. Tabs are now shown as \t in -bP output.
3125 19. If the log selector return_path_on_delivery was set, Exim crashed when
3126 bouncing a message because it had too many Received: header lines.
3128 20. If two routers both had headers_remove settings, and the first one included
3129 a superfluous trailing colon, the final name in the first list and the
3130 first name in the second list were incorrectly joined into one item (with a
3131 colon in the middle).
3137 1. Added -C and -D options to the exinext utility, mainly to make it easier
3138 to include in the automated testing, but these could be helpful when
3139 multiple configurations are in use.
3141 2. The exinext utility was not formatting the output nicely when there was
3142 an alternate port involved in the retry record key, nor when there was a
3143 message id as well (for retries that were specific to a specific message
3144 and a specific host). It was also confused by IPv6 addresses, because of
3145 the additional colons they contain. I have fixed the IPv4 problem, and
3146 patched it up to do a reasonable job for IPv6.
3148 3. When there is an error after a MAIL, RCPT, or DATA SMTP command during
3149 delivery, the log line now contains "pipelined" if PIPELINING was used.
3151 4. An SMTP transport process used to panic and die if the bind() call to set
3152 an explicit outgoing interface failed. This has been changed; it is now
3153 treated in the same way as a connect() failure.
3155 5. A reference to $sender_host_name in the part of a conditional expansion
3156 that was being skipped was still causing a DNS lookup. This no longer
3159 6. The def: expansion condition was not recognizing references to header lines
3160 that used bh_ and bheader_.
3162 7. Added the _cache feature to named lists.
3164 8. The code for checking quota_filecount in the appendfile transport was
3165 allowing one more file than it should have been.
3167 9. For compatibility with Sendmail, the command line option
3175 and sets the incoming protocol and host name (for trusted callers). The
3176 host name and its colon can be omitted when only the protocol is to be set.
3177 Note the Exim already has two private options, -pd and -ps, that refer to
3178 embedded Perl. It is therefore impossible to set a protocol value of "d" or
3179 "s", but I don't think that's a major issue.
3181 10. A number of refactoring changes to the code, none of which should affect
3184 (a) The number of logging options was getting close to filling up the
3185 32-bit word that was used as a bit map. I have split them into two classes:
3186 those that are passed in the argument to log_write(), and those that are
3187 only ever tested independently outside of that function. These are now in
3188 separate 32-bit words, so there is plenty of room for expansion again.
3189 There is no change in the user interface or the logging behaviour.
3191 (b) When building, for example, log lines, the code previously used a
3192 macro that called string_cat() twice, in order to add two strings. This is
3193 not really sufficiently general. Furthermore, there was one instance where
3194 it was actually wrong because one of the argument was used twice, and in
3195 one call a function was used. (As it happened, calling the function twice
3196 did not affect the overall behaviour.) The macro has been replaced by a
3197 function that can join an arbitrary number of extra strings onto a growing
3200 (c) The code for expansion conditions now uses a table and a binary chop
3201 instead of a serial search (which was left over from when there were very
3202 few conditions). Also, it now recognizes conditions like "pam" even when
3203 the relevant support is not compiled in: a suitably worded error message is
3204 given if an attempt is made to use such a condition.
3206 11. Added ${time_interval:xxxxx}.
3208 12. A bug was causing one of the ddress fields not to be passed back correctly
3209 from remote delivery subprocesses. The field in question was not being
3210 subsequently used, so this caused to problems in practice.
3212 13. Added new log selectors queue_time and deliver_time.
3214 14. Might have fixed a bug in maildirsizefile handling that threw up
3215 "unexpected character" debug warnings, and recalculated the data
3216 unnecessarily. In any case, I expanded the warning message to give more
3219 15. Added the message "Restricted characters in address" to the statements in
3220 the default ACL that block characters like @ and % in local parts.
3222 16. Change 71 for release 4.31 proved to be much less benign that I imagined.
3223 Three changes have been made:
3225 (a) There was a serious bug; a negative response to MAIL caused the whole
3226 recipient domain to be cached as invalid, thereby blocking all messages
3227 to all local parts at the same domain, from all senders. This bug has
3228 been fixed. The domain is no longer cached after a negative response to
3229 MAIL if the sender used is not empty.
3231 (b) The default behaviour of using MAIL FROM:<> for recipient callouts has
3234 (c) A new callout option, "use_sender" has been added for people who want
3235 the modified behaviour.
3241 1. Removed "EXTRALIBS=-lwrap" from OS/Makefile-Unixware7 on the advice of
3244 2. Removed "LIBS = -lresolv" from OS/Makefile-Darwin as it is not needed, and
3245 indeed breaks things for older releases.
3247 3. Added additional logging to the case where there is a problem reading data
3248 from a filter that is running in a subprocess using a pipe, in order to
3249 try to track down a specific problem.
3251 4. Testing facility fudge: when running in the test harness and attempting
3252 to connect to 10.x.x.x (expecting a connection timeout) I'm now sometimes
3253 getting "No route to host". Convert this to a timeout.
3255 5. Define ICONV_ARG2_TYPE as "char **" for Unixware7 to avoid compiler
3258 6. Some OS don't have socklen_t but use size_t instead. This affects the
3259 fifth argument of getsockopt() amongst other things. This is now
3260 configurable by a macro called SOCKLEN_T which defaults to socklen_t, but
3261 can be set for individual OS. I have set it for SunOS5, OSF1, and
3262 Unixware7. Current versions of SunOS5 (aka Solaris) do have socklen_t, but
3263 some earlier ones do not.
3265 7. Change 4.30/15 was not doing the test caselessly.
3267 8. The standard form for an IPv6 address literal was being rejected by address
3268 parsing in, for example, MAIL and RCPT commands. An example of this kind of
3269 address is [IPv6:2002:c1ed:8229:10:202:2dff:fe07:a42a]. Exim now accepts
3270 this, as well as the form without the "IPv6" on the front (but only when
3271 address literals are enabled, of course).
3273 9. Added some casts to avoid compiler warnings in OS/os.c-Linux.
3275 10. Exim crashed if a message with an empty sender address specified by -f
3276 encountered a router with an errors_to setting. This could be provoked only
3277 by a command such as
3281 where an empty string was supplied; "<>" did not hit this bug.
3283 11. Installed PCRE release 4.5.
3285 12. If EHLO/HELO was rejected by an ACL, the value of $sender_helo_name
3286 remained set. It is now erased.
3288 13. exiqgrep wasn't working on MacOS X because it didn't correctly compute
3289 times from message ids (which are base 36 rather than the normal 62).
3291 14. "Expected" SMTP protocol errors that can arise when PIPELINING is in use
3292 were being counted as actual protocol errors, and logged if the log
3293 selector +smtp_protocol_error was set. One cannot be perfect in this test,
3294 but now, if PIPELINING has been advertised, RCPT following a rejected MAIL,
3295 and DATA following a set of rejected RCPTs do not count as protocol errors.
3296 In other words, Exim assumes they were pipelined, though this may not
3297 actually be the case. Of course, in all cases the client gets an
3298 appropriate error code.
3300 15. If a lookup fails in an ACL condition, a message about the failure may
3301 be available; it is used if testing the ACL cannot continue, because most
3302 such messages specify what the cause of the deferral is. However, some
3303 messages (e.g. "MYSQL: no data found") do not cause a defer. There was bug
3304 that caused an old message to be retained and used if a later statement
3305 caused a defer, replacing the real cause of the deferral.
3307 16. If an IP address had so many PTR records that the DNS lookup buffer
3308 was not large enough to hold them, Exim could crash while trying to process
3309 the truncated data. It now detects and logs this case.
3311 17. Further to 4.21/58, another change has been made: if (and only if) the
3312 first line of a message (the first header line) ends with CRLF, a bare LF
3313 in a subsequent header line has a space inserted after it, so as not to
3314 terminate the header.
3316 18. Refactoring: tidied an ugly bit of code in appendfile that copied data
3317 unnecessarily, used atoi() instead of strtol(), and didn't check the
3318 termination when getting file sizes from file names by regex.
3320 19. Completely re-implemented the support for maildirsize files, in the light
3321 of a number of problems with the previous contributed implementation
3322 (4.30/29). In particular:
3324 . If the quota is zero, the maildirsize file is maintained, but no quota is
3327 . If the maildir directory does not exist, it is created before any attempt
3328 to write a maildirsize file.
3330 . The quota value in the file is just a cache; if the quota is changed in
3331 the transport, the new value overrides.
3333 . A regular expression is available for excluding directories from the
3336 20. The autoreply transport checks the characters in options that define the
3337 message's headers; it allows continued headers, but it was checking with
3338 isspace() after an embedded newline instead of explicitly looking for a
3341 21. If all the "regular" hosts to which an address was routed had passed their
3342 expiry times, and had not reached their retry times, the address was
3343 bounced, even if fallback hosts were defined. Now Exim should go on to try
3346 22. Increased buffer sizes in the callout code from 1024 to 4096 to match the
3347 equivalent code in the SMTP transport. Some hosts send humungous responses
3348 to HELO/EHLO, more than 1024 it seems.
3350 23. Refactoring: code in filter.c used (void *) for "any old type" but this
3351 gives compiler warnings in some environments. I've now done it "properly",
3354 24. The replacement for inet_ntoa() that is used with gcc on IRIX systems
3355 (because of problems with the built-in one) was declared to return uschar *
3356 instead of char *, causing compiler failure.
3358 25. Fixed a file descriptor leak when processing alias/forward files.
3360 26. Fixed a minor format string issue in dbfn.c.
3362 27. Typo in exim.c: ("dmbnz" for "dbmnz").
3364 28. If a filter file refered to $h_xxx or $message_headers, and the headers
3365 contained RFC 2047 "words", Exim's memory could, under certain conditions,
3368 29. When a sender address is verified, it is cached, to save repeating the test
3369 when there is more than one recipient in a message. However, when the
3370 verification involves a callout, it is possible for different callout
3371 options to be set for different recipients. It is too complicated to keep
3372 track of this in the cache, so now Exim always runs a verification when a
3373 callout is required, relying on the callout cache for the optimization.
3374 The overhead is duplication of the address routing, but this should not be
3377 30. Fixed a bug in callout caching. If a RCPT command caused the sender address
3378 to be verified with callout=postmaster, and the main callout worked but the
3379 postmaster check failed, the verification correctly failed. However, if a
3380 subsequent RCPT command asked for sender verification *without* the
3381 postmaster check, incorrect caching caused this verification also to fail,
3384 31. Exim caches DNS lookup failures so as to avoid multiple timeouts; however,
3385 it was not caching the DNS options (qualify_single, search_parents) that
3386 were used when the lookup failed. A subsequent lookup with different
3387 options therefore always gave the same answer, though there were cases
3388 where it should not have. (Example: a "domains = !$mx_any" option on a
3389 dnslookup router: the "domains" option is always processed without any
3390 widening, but the router might have qualify_single set.) Now Exim uses the
3391 cached value only when the same options are set.
3393 32. Added John Jetmore's "exipick" utility to the distribution.
3395 33. GnuTLS: When an attempt to start a TLS session fails for any reason other
3396 than a timeout (e.g. a certificate is required, and is not provided), an
3397 Exim server now closes the connection immediately. Previously it waited for
3398 the client to close - but if the client is SSL, it seems that they each
3399 wait for each other, leading to a delay before one of them times out.
3401 34: GnuTLS: Updated the code to use the new GnuTLS 1.0.0 API. I have not
3402 maintained 0.8.x compatibility because I don't think many are using it, and
3403 it is clearly obsolete.
3405 35. Added TLS support for CRLs: a tls_crl global option and one for the smtp
3408 36. OpenSSL: $tls_certificate_verified was being set to 1 even if the
3409 client certificate was expired. A simple patch fixes this, though I don't
3410 understand the full logic of why the verify callback is called multiple
3413 37. OpenSSL: a patch from Robert Roselius: "Enable client-bug workaround.
3414 Versions of OpenSSL as of 0.9.6d include a 'CBC countermeasure' feature,
3415 which causes problems with some clients (such as the Certicom SSL Plus
3416 library used by Eudora). This option, SSL_OP_DONT_INSERT_EMPTY_FRAGMENTS,
3417 disables the coutermeasure allowing Eudora to connect."
3419 38. Exim was not checking that a write() to a log file succeeded. This could
3420 lead to Bad Things if a log got too big, in particular if it hit a file
3421 size limit. Exim now panics and dies if it cannot write to a log file, just
3422 as it does if it cannot open a log file.
3424 39. Modified OS/Makefile-Linux so that it now contains
3426 CFLAGS=-O -D_FILE_OFFSET_BITS=64 -D_LARGEFILE_SOURCE
3428 The two -D definitions ensure that Exim is compiled with large file
3429 support, which makes it possible to handle log files that are bigger than
3432 40. Fixed a subtle caching bug: if (in an ACL or a set of routers, for
3433 instance) a domain was checked against a named list that involved a lookup,
3434 causing $domain_data to be set, then another domain was checked against the
3435 same list, then the first domain was re-checked, the value of $domain_data
3436 after the final check could be wrong. In particular, if the second check
3437 failed, it could be set empty. This bug probably also applied to
3440 41. The strip_trailing_dot option was not being applied to the address given
3441 with the -f command-line option.
3443 42. The code for reading a message's header from the spool was incrementing
3444 $received_count, but never initializing it. This meant that the value was
3445 incorrect (doubled) while delivering a message in the same process in which
3446 it was received. In the most common configuration of Exim, this never
3447 happens - a fresh exec is done - but it can happen when
3448 deliver_drop_privilege is set.
3450 43. When Exim logs an SMTP synchronization error - client data sent too soon -
3451 it now includes up to 150 characters of the unexpected data in the log
3454 44. The exim_dbmbuild utility uses fixed size buffers for reading input lines
3455 and building data strings. The size of both of these buffers was 10 000
3456 bytes - far larger than anybody would *ever* want, thought I. Needless to
3457 say, somebody hit the limit. I have increased the maximum line length to
3458 20 000 and the maximum data length of concatenated lines to 100 000. I have
3459 also fixed two bugs, because there was no checking on these buffers. Tsk,
3460 tsk. Now exim_dbmbuild gives a message and exits with an error code if a
3461 buffer is too small.
3463 45. The exim_dbmbuild utility did not support quoted keys, as Exim does in
3464 lsearch lookups. Now it does.
3466 46. When parsing a route_list item in a manualroute router, a fixed-length
3467 buffer was used for the list of hosts. I made this 1024 bytes long,
3468 thinking that nobody would ever have a list of hosts that long. Wrong.
3469 Somebody had a whole pile of complicated expansion conditions, and the
3470 string was silently truncated, leading to an expansion error. It turns out
3471 that it is easier to change to an unlimited length (owing to other changes
3472 that have happened since this code was originally written) than to build
3473 structure for giving a limitation error. The length of the item that
3474 expands into the list of hosts is now unlimited.
3476 47. The lsearch lookup could not handle data where the length of text line was
3477 more than 4095 characters. Such lines were truncated, leading to shortened
3478 data being returned. It should now handle lines of any length.
3480 48. Minor wording revision: "cannot test xxx in yyy ACL" becomes "cannot test
3481 xxx condition in yyy ACL" (e.g. "cannot test domains condition in DATA
3484 49. Cosmetic tidy to scripts like exicyclog that are generated by globally
3485 replacing strings such as BIN_DIRECTORY in a source file: the replacement
3486 no longer happens in comment lines. A list of replacements is now placed
3487 at the head of all of the source files, except those whose only change is
3488 to replace PERL_COMMAND in the very first #! line.
3490 50. Replaced the slow insertion sort in queue.c, for sorting the list of
3491 messages on the queue, with a bottom-up merge sort, using code contributed
3492 by Michael Haardt. This should make operations like -bp somewhat faster on
3493 large queues. It won't affect queue runners, except when queue_run_in_order
3496 51. Installed eximstats 1.31 in the distribution.
3498 52. Added support for SRV lookups to the dnslookup router.
3500 53. If an ACL referred to $message_body or $message_body_end, the value was not
3501 reset for any messages that followed in the same SMTP session.
3503 54. The store-handling optimization for building very long strings was not
3504 differentiating between the different store pools. I don't think this
3505 actually made any difference in practice, but I've tidied it.
3507 55. While running the routers to verify a sender address, $sender_address
3508 was still set to the sender address. This is wrong, because when routing to
3509 send a bounce to the sender, it would be empty. Therefore, I have changed
3510 it so that, while verifying a sender address, $sender_address is set to <>.
3511 (There is no change to what happens when verifying a recipient address.)
3513 56. After finding MX (or SRV) records, Exim was doing a DNS lookup for the
3514 target A or AAAA records (if not already returned) without resetting the
3515 qualify_single or search_parents options of the DNS resolver. These are
3516 inappropriate in this case because the targets of MX and SRV records must
3517 be FQDNs. A broken DNS record could cause trouble if it happened to have a
3518 target that, when qualified, matched something in the local domain. These
3519 two options are now turned off when doing these lookups.
3521 57. It seems that at least some releases of Reiserfs (which does not have the
3522 concept of a fixed number of inodes) returns zero and not -1 for the
3523 number of available inodes. This interacted badly with check_spool_inodes,
3524 which assumed that -1 was the "no such thing" setting. What I have done is
3525 to check that the total number of inodes is greater than zero before doing
3526 the test of how many are available.
3528 58. When a "warn" ACL statement has a log_message modifier, the message is
3529 remembered, and not repeated. This is to avoid a lot of repetition when a
3530 message has many recipients that cause the same warning to be written.
3531 Howewer, Exim was preserving the list of already written lines for an
3532 entire SMTP session, which doesn't seem right. The memory is now reset if a
3533 new message is started.
3535 59. The "rewrite" debugging flag was not showing the result of rewriting in the
3536 debugging output unless log_rewrite was also set.
3538 60. Avoid a compiler warning on 64-bit systems in dsearch.c by avoiding the use
3539 of (int)(handle) when we know that handle contains (void *)(-1).
3541 61. The Exim daemon panic-logs an error return when it closes the incoming
3542 connection. However "connection reset by peer" seems to be common, and
3543 isn't really an error worthy of noting specially, so that particular error
3546 62. When Exim is trying to find all the local interfaces, it used to panic and
3547 die if the ioctl to get the interface flags failed. However, it seems that
3548 on at least one OS (Solaris 9) it is possible to have an interface that is
3549 included in the list of interfaces, but for which you get a failure error
3550 for this call. This happens when the interface is not "plumbed" into a
3551 protocol (i.e. neither IPv4 nor IPv6). I've changed the code so that a
3552 failure of the "get flags" call assumes that the interface is down.
3554 63. Added a ${eval10: operator, which assumes all numbers are decimal. This
3555 makes life easier for people who are doing arithmetic on fields extracted
3556 from dates, where you often get leading zeros that should not be
3557 interpreted as octal.
3559 64. Added qualify_domain to the redirect router, to override the global
3562 65. If a pathologically long header line contained very many addresses (the
3563 report of this problem mentioned 10 000) and each of them was rewritten,
3564 Exim could use up a very large amount of memory. (It kept on making new
3565 copies of the header line as it rewrote, and never released the old ones.)
3566 At the expense of a bit more processing, the header rewriting function has
3567 been changed so that it no longer eats memory in this way.
3569 66. The generation of the Received: header has been moved from the time that a
3570 message starts to be received, to the time that it finishes. The timestamp
3571 in the Received: header should now be very close to that of the <= log
3572 line. There are two side-effects of this change:
3574 (a) If a message is rejected by a DATA or non-SMTP ACL or local_scan(), the
3575 logged header lines no longer include the local Received: line, because
3576 it has not yet been created. The same applies to a copy of the message
3577 that is returned to a non-SMTP sender when a message is rejected.
3579 (b) When a filter file is tested using -bf, no additional Received: header
3580 is added to the test message. After some thought, I decided that this
3583 This change does not affect the value of $received_for. It is still set
3584 after address rewriting, but before local_scan() is called.
3586 67. Installed the latest Cygwin-specific files from the Cygwin maintainer.
3588 68. GnuTLS: If an empty file is specified for tls_verify_certificates, GnuTLS
3589 gave an unhelpful panic error message, and a defer error. I have managed to
3590 change this behaviour so that it now rejects any supplied certificate,
3591 which seems right, as the list of acceptable certificates is empty.
3593 69. OpenSSL: If an empty file is specified for tls_verify_certificates, OpenSSL
3594 gave an unhelpful defer error. I have not managed to make this reject any
3595 supplied certificates, but the error message it gives is "no certificate
3596 supplied", which is not helpful.
3598 70. exigrep's output now also includes lines that are not associated with any
3599 message, but which match the given pattern. Implemented by a patch from
3600 Martin Sluka, which also tidied up the Perl a bit.
3602 71. Recipient callout verification, like sender verification, was using <> in
3603 the MAIL FROM command. This isn't really the right thing, since the actual
3604 sender may affect whether the remote host accepts the recipient or not. I
3605 have changed it to use the actual sender in the callout; this means that
3606 the cache record is now keyed on a recipient/sender pair, not just the
3607 recipient address. There doesn't seem to be a real danger of callout loops,
3608 since a callout by the remote host to check the sender would use <>.
3609 [SEE ABOVE: changed after hitting problems.]
3611 72. Exim treats illegal SMTP error codes that do not begin with 4 or 5 as
3612 temporary errors. However, in the case of such a code being given after
3613 the end of a data transmission (i.e. after ".") Exim was failing to write
3614 a retry record for the message. (Yes, there was some broken host that was
3615 actually sending 8xx at this point.)
3617 73. An unknown lookup type in a host list could cause Exim to panic-die when
3618 the list was checked. (An example that provoked this was putting <; in the
3619 middle of a list instead of at the start.) If this happened during a DATA
3620 ACL check, a -D file could be left lying around. This kind of configuration
3621 error no longer causes Exim to die; instead it causes a defer errror. The
3622 incident is still logged to the main and panic logs.
3624 74. Buglet left over from Exim 3 conversion. The message "too many messages
3625 in one connection" was written to the rejectlog but not the mainlog, except
3626 when address rewriting (yes!) was being logged.
3628 75. Added write_rejectlog option.
3630 76. When a system filter was run not as root (that is, when system_filter_user
3631 was set), the values of the $n variables were not being returned to the
3632 main process; thus, they were not subsequently available in the $sn
3635 77. Added +return_path_on_delivery log selector.
3637 78. A connection timeout was being treated differently from recipients deferred
3638 when testing hosts_max_try with a message that was older than the host's
3639 retry timeout. (The host should not be counted, thus allowing all hosts to
3640 be tried at least once before bouncing.) This may have been the cause of an
3641 occasionally reported bug whereby a message would remain on the queue
3642 longer than the retry timeout, but would be bounced if a delivery was
3643 forced. I say "may" because I never totally pinned down the problem;
3644 setting up timeout/retry tests is difficult. See also the next item.
3646 79. The ultimate address timeout was not being applied to errors that involved
3647 a combination of host plus message (for example, a timeout on a MAIL
3648 command). When an address resolved to a number of possible hosts, and they
3649 were not all tried for each delivery (e.g. because of hosts_max_try), a
3650 message could remain on the queue longer than the retry timeout.
3652 80. Sieve bug: "stop" inside "elsif" was broken. Applied a patch from Michael
3655 81. Fixed an obscure SMTP outgoing bug which required at least the following
3656 conditions: (a) there was another message waiting for the same server;
3657 (b) the server returned 5xx to all RCPT commands in the first message so
3658 that the message was not completed; (c) the server dropped the connection
3659 or gave a negative response to the RSET that Exim sends to abort the
3660 transaction. The observed case was a dropped connection after DATA that had
3661 been sent in pipelining mode. That is, the server had advertised PIPELINING
3662 but was not implementing it correctly. The effect of the bug was incorrect
3663 behaviour, such as trying another host, and this could lead to a crash.
3669 1. The 3rd arguments to getsockname(), getpeername(), and accept() in exim.c
3670 and daemon.c were passed as pointers to ints; they should have been
3671 pointers to socklen_t variables (which are typically unsigned ints).
3673 2. Some signed/unsigned type warnings in the os.c file for Linux have been
3676 3. Fixed a really odd bug that affected only the testing scheme; patching a
3677 certain fixed string in the binary changed the value of another string that
3678 happened to be identical to the end of the original first string.
3680 4. When gethostbyname() (or equivalent) is passed an IP address as a "host
3681 name", it returns that address as the IP address. On some operating
3682 systems (e.g. Solaris), it also passes back the IP address string as the
3683 "host name". However, on others (e.g. Linux), it passes back an empty
3684 string. Exim wasn't checking for this, and was changing the host name to an
3685 empty string, assuming it had been canonicized.
3687 5. Although rare, it is permitted to have more than one PTR record for a given
3688 IP address. I thought that gethostbyaddr() or getipnodebyaddr() always gave
3689 all the names associated with an address, because they do in Solaris.
3690 However, it seems that they do not in Linux for data that comes from the
3691 DNS. If an address in /etc/hosts has multiple names, they _are_ all given.
3692 I found this out when I moved to a new Linux workstation and tried to run
3693 the Exim test suite.
3695 To get round this problem I have changed the code so that it now does its
3696 own call to the DNS to look up PTR records when searching for a host name.
3697 If nothing can be found in the DNS, it tries gethostbyaddr(), so that
3698 addresses that are only in /etc/hosts are still found.
3700 This behaviour is, however, controlled by an option called host_lookup_
3701 order, which defaults to "bydns:byaddr". If people want to use the other
3702 order, or indeed, just use one or the other means of lookup, they can
3703 specify it in this variable.
3705 6. If a PTR record yields an empty name, Exim treats it as non-existent. In
3706 some operating systems, this comes back from gethostbyaddr() as an empty
3707 string, and this is what Exim used to test for. However, it seems that in
3708 other systems, "." is yielded. Exim now tests for this case too.
3710 7. The values of check_spool_space and check_log_space are now held internally
3711 as a number of kilobytes instead of an absolute number of bytes. If a
3712 numbers is specified without 'K' or 'M', it is rounded up to the nearest
3713 kilobyte. This means that much larger values can be stored.
3715 8. Exim monitor: an attempt to get the action menu when not actually pointing
3716 at a message produces an empty menu entitled "No message selected". This
3717 works on Solaris (OpenWindows). However, XFree86 does not like a menu with
3718 no entries in it ("Shell widget menu has zero width and/or height"). So I
3719 have added a single, blank menu entry in this case.
3721 9. Added ${quote_local_part.
3723 10. MIME decoding is now applied to the contents of Subject: header lines when
3726 11. Now that a reference to $sender_host_address automatically causes a reverse
3727 lookup to occur if necessary (4.13/18), there is no need to arrange for a
3728 host lookup before query-style lookups in lists that might use this
3729 variable. This has therefore been abolished, and the "net-" prefix is no
3730 longer necessary for query-style lookups.
3732 12. The Makefile for SCO_SV contained a setting of LDFLAGS. This appears to
3733 have been a typo for LFLAGS, so it has been changed.
3735 13. The install script calls Exim with "-C /dev/null" in order to find the
3736 version number. If ALT_CONFIG_PREFIX was set, this caused an error message
3737 to be output. Howeve, since Exim outputs its version number before the
3738 error, it didn't break the script. It just looked ugly. I fixed this by
3739 always allowing "-C /dev/null" if the caller is root.
3741 14. Ignore overlarge ACL variable number when reading spool file - insurance
3742 against a later release with more variables having written the file.
3744 15. The standard form for an IPv6 address literal was being rejected by EHLO.
3745 Example: [IPv6:2002:c1ed:8229:10:202:2dff:fe07:a42a]. Exim now accepts
3746 this, as well as the form without the "IPv6" on the front.
3748 16. Added CHOWN_COMMAND=/usr/sbin/chown and LIBS=-lresolv to the
3749 OS/Makefile-Darwin file.
3751 17. Fixed typo in lookups/ldap.c: D_LOOKUP should be D_lookup. This applied
3752 only to LDAP libraries that do not have LDAP_OPT_DEREF.
3754 18. After change 4.21/52, "%ld" was used to format the contents of the $inode
3755 variable. However, some OS use ints for inodes. I've added cast to long int
3756 to get rid of the compiler warning.
3758 19. I had forgotten to lock out "/../" in configuration file names when
3759 ALT_CONFIG_PREFIX was set.
3761 20. Routers used for verification do not need to specify transports. However,
3762 if such a router generated a host list, and callout was configured, Exim
3763 crashed, because it could not find a port number from the (non-existent)
3764 transport. It now assumes port 25 in this circumstance.
3766 21. Added the -t option to exigrep.
3768 22. If LOOKUP_LSEARCH is defined, all three linear search methods (lsearch,
3769 wildlsearch, nwildlsearch) are compiled. LOOKUP_WILDLSEARCH and LOOKUP_
3770 NWILDLSEARCH are now obsolete, but retained for compatibility. If either of
3771 them is set, LOOKUP_LSEARCH is forced.
3773 23. "exim -bV" now outputs a list of lookups that are included in the binary.
3775 24. Added sender and host information to the "rejected by local_scan()" log
3776 line; previously there was no indication of these.
3778 25. Added .include_if_exists.
3780 26. Change 3.952/11 added an explicit directory sync on top of a file sync for
3781 Linux. It turns out that not all file systems support this. Apparently some
3782 versions of NFS do not. (It's rare to put Exim's spool on NFS, but people
3783 do it.) To cope with this, the error EINVAL, which means that sync-ing is
3784 not supported on the file descriptor, is now ignored when Exim is trying to
3785 sync a directory. This applies only to Linux.
3787 27. Added -DBIND_8_COMPAT to the CLFAGS setting for Darwin.
3789 28. In Darwin (MacOS X), the PAM headers are in /usr/include/pam and not in
3790 /usr/include/security. There's now a flag in OS/os.h-Darwin to cope with
3793 29. Added support for maildirsize files from supplied patch (modified a bit).
3795 30. The use of :fail: followed by an empty string could lead Exim to respond to
3796 sender verification failures with (e.g.):
3798 550 Verification failed for <xxx>
3799 550 Sender verify failed
3801 where the first response line was missing the '-' that indicates it is not
3802 the final line of the response.
3804 31. The loop for finding the name of the user that called Exim had a hardwired
3805 limit of 10; it now uses the value of finduser_retries, which is used for
3806 all other user lookups.
3808 32. Added $received_count variable, available in data and not_smtp ACLs, and at
3811 33. Exim was neglecting to zero errno before one call of strtol() when
3812 expanding a string and expecting an integer value. On some systems this
3813 resulted in spurious "integer overflow" errors. Also, it was casting the
3814 result into an int without checking.
3816 34. Testing for a connection timeout using "timeout_connect" in the retry rules
3817 did not work. The code looks as if it has *never* worked, though it appears
3818 to have been documented since at least releast 1.62. I have made it work.
3820 35. The "timeout_DNS" error in retry rules, also documented since at least
3821 1.62, also never worked. As it isn't clear exactly what this means, and
3822 clearly it isn't a major issue, I have abolished the feature by treating it
3823 as "timeout", and writing a warning to the main and panic logs.
3825 36. The display of retry rules for -brt wasn't always showing the error code
3828 37. Added new error conditions to retry rules: timeout_A, timeout_MX,
3829 timeout_connect_A, timeout_connect_MX.
3831 38. Rewriting the envelope sender at SMTP time did not allow it to be rewritten
3832 to the empty sender.
3834 39. The daemon was not analysing the content of -oX till after it had closed
3835 stderr and disconnected from the controlling terminal. This meant that any
3836 syntax errors were only noted on the panic log, and the return code from
3837 the command was 0. By re-arranging the code a little, I've made the
3838 decoding happen first, so such errors now appear on stderr, and the return
3839 code is 1. However, the actual setting up of the sockets still happens in
3840 the disconnected process, so errors there are still only recorded on the
3843 40. A daemon listener on a wildcard IPv6 socket that also accepts IPv4
3844 connections (as happens on some IP stacks) was logged at start up time as
3845 just listening for IPv6. It now logs "IPv6 with IPv4". This differentiates
3846 it from "IPv6 and IPv4", which means that two separate sockets are being
3849 41. The debug output for gethostbyname2() or getipnodebyname() failures now
3850 says whether AF_INET or AF_INET6 was passed as an argument.
3852 42. Exiwhat output was messed up when time zones were included in log
3855 43. Exiwhat now gives more information about the daemon's listening ports,
3856 and whether -tls-on-connect was used.
3858 44. The "port" option of the smtp transport is now expanded.
3860 45. A "message" modifier in a "warn" statement in a non-message ACL was being
3861 silently ignored. Now an error message is written to the main and panic
3864 46. There's a new ACL modifier called "logwrite" which writes to a log file
3865 as soon as it is encountered.
3867 47. Added $local_user_uid and $local_user_gid at routing time.
3869 48. Exim crashed when trying to verify a sender address that was being
3872 49. Exim was recognizing only a space character after ".include". It now also
3873 recognizes a tab character.
3875 50. Fixed several bugs in the Perl script that creates the exim.8 man page by
3876 extracting the relevant information from the specification. The man page no
3877 longer contains scrambled data for the -d option, and I've added a section
3878 at the front about calling Exim under different names.
3880 51. Added "extra_headers" argument to the "mail" command in filter files.
3882 52. Redirecting mail to an unqualified address in a Sieve filter caused Exim to
3885 53. Installed eximstats 1.29.
3887 54. Added transport_filter_timeout as a generic transport option.
3889 55. Exim no longer adds an empty Bcc: header to messages that have no To: or
3890 Cc: header lines. This was required by RFC 822, but it not required by RFC
3893 56. Exim used to add From:, Date:, and Message-Id: header lines to any
3894 incoming messages that did not have them. Now it does so only if the
3895 message originates locally, that is, if there is no associated remote host
3896 address. When Resent- header lines are present, this applies to the Resent-
3897 lines rather than the non-Resent- lines.
3899 57. Drop incoming SMTP connection after too many syntax or protocol errors. The
3900 limit is controlled by smtp_max_synprot_errors, defaulting to 3.
3902 58. Messages for configuration errors now include the name of the main
3903 configuration file - useful now that there may be more than one file in a
3904 list (.included file names were always shown).
3906 59. Change 4.21/82 (run initgroups() when starting the daemon) causes problems
3907 for those rare installations that do not start the daemon as root or run it
3908 setuid root. I've cut out the call to initgroups() if the daemon is not
3911 60. The Exim user and group can now be bound into the binary as text strings
3912 that are looked up at the start of Exim's processing.
3914 61. Applied a small patch for the Interbase code, supplied by Ard Biesheuvel.
3916 62. Added $mailstore_basename variable.
3918 63. Installed patch to sieve.c from Michael Haardt.
3920 64. When Exim failed to open the panic log after failing to open the main log,
3921 the original message it was trying to log was written to stderr and debug
3922 output, but if they were not available (the usual case in production), it
3923 was lost. Now it is written to syslog before the two lines that record the
3924 failures to open the logs.
3926 65. Users' Exim filters run in subprocesses under the user's uid. It is
3927 possible for a "deliver" command or an alias in a "personal" command to
3928 provoke an address rewrite. If logging of address rewriting is configured,
3929 this fails because the process is not running as root or exim. There may be
3930 a better way of dealing with this, but for the moment (because 4.30 needs
3931 to be released), I have disabled address rewrite logging when running a
3932 filter in a non-root, non-exim process.
3938 1. The buildconfig auxiliary program wasn't quoting the value set for
3939 HEADERS_CHARSET. This caused a compilation error complaining that 'ISO' was
3940 not defined. This bug was masked in 4.22 by the effect that was fixed in
3943 2. Some messages that were rejected after a message id was allocated were
3944 shown as "incomplete" by exigrep. It no longer does this for messages that
3945 are rejected by local_scan() or the DATA or non-SMTP ACLs.
3947 3. If a Message-ID: header used a domain literal in the ID, and Exim did not
3948 have allow_domain_literals set, the ID did not get logged in the <= line.
3949 Domain literals are now always recognized in Message-ID: header lines.
3951 4. The first argument for a ${extract expansion item is the key name or field
3952 number. Leading and trailing spaces in this item were not being ignored,
3953 causing some misleading effects.
3955 5. When deliver_drop_privilege was set, single queue runner processes started
3956 manually (i.e. by the command "exim -q") or by the daemon (which uses the
3957 same command in the process it spins off) were not dropping privilege.
3959 6. When the daemon running as "exim" started a queue runner, it always
3960 re-executed Exim in the spun-off process. This is a waste of effort when
3961 deliver_drop_privilege is set. The new process now just calls the
3962 queue-runner function directly.
3968 1. Typo in the src/EDITME file: it referred to HEADERS_DECODE_TO instead of
3971 2. Change 4.21/73 introduced a bug. The pid file path set by -oP was being
3972 ignored. Though the use of -oP was forcing the writing of a pid file, it
3973 was always written to the default place.
3975 3. If the message "no IP address found for host xxxx" is generated during
3976 incoming verification, it is now followed by identification of the incoming
3977 connection (so you can more easily find what provoked it).
3979 4. Bug fix for Sieve filters: "stop" inside a block was not working properly.
3981 5. Added some features to "harden" Exim a bit more against certain attacks:
3983 (a) There is now a build-time option called FIXED_NEVER_USERS that can
3984 be put in Local/Makefile. This is like the never_users runtime option,
3985 but it cannot be overridden. The default setting is "root".
3987 (b) If ALT_CONFIG_PREFIX is defined in Local/Makefile, it specifies a
3988 prefix string with which any file named in a -C command line option
3991 (c) If ALT_CONFIG_ROOT_ONLY is defined in Local/Makefile, root privilege
3992 is retained for -C and -D only if the caller of Exim is root. Without
3993 it, the exim user may also use -C and -D and retain privilege.
3995 (d) If DISABLE_D_OPTION is defined in Local/Makefile, the use of the -D
3996 command line option is disabled.
3998 6. Macro names set by the -D option must start with an upper case letter, just
3999 like macro names defined in the configuration file.
4001 7. Added "dereference=" facility to LDAP.
4003 8. Two instances of the typo "uknown" in the source files are fixed.
4005 9. If a PERL_COMMAND setting in Local/Makefile was not at the start of a line,
4006 the Configure-Makefile script screwed up while processing it.
4008 10. Incorporated PCRE 4.4.
4010 11. The SMTP synchronization check was not operating right at the start of an
4011 SMTP session. For example, it could not catch a HELO sent before the client
4012 waited for the greeting. There is now a check for outstanding input at the
4013 point when the greeting is written. Because of the duplex, asynchronous
4014 nature of TCP/IP, it cannot be perfect - the incorrect input may be on its
4015 way, but not yet received, when the check is performed.
4017 12. Added tcp_nodelay to make it possible to turn of the setting of TCP_NODELAY
4018 on TCP/IP sockets, because this apparently causes some broken clients to
4021 13. Installed revised OS/Makefile-CYGWIN and OS/os.c-cygwin (the .h file was
4022 unchanged) from the Cygwin maintainer.
4024 14. The code for -bV that shows what is in the binary showed "mbx" when maildir
4025 was supported instead of testing for mbx. Effectively a typo.
4027 15. The spa authenticator server code was not checking that the input it
4028 received was valid base64.
4030 16. The debug output line for the "set" modifier in ACLs was not showing the
4031 name of the variable that was being set.
4033 17. Code tidy: the variable type "vtype_string" was never used. Removed it.
4035 18. Previously, a reference to $sender_host_name did not cause a DNS reverse
4036 lookup on its own. Something else was needed to trigger the lookup. For
4037 example, a match in host_lookup or the need for a host name in a host list.
4038 Now, if $sender_host_name is referenced and the host name has not yet been
4039 looked up, a lookup is performed. If the lookup fails, the variable remains
4040 empty, and $host_lookup_failed is set to "1".
4042 19. Added "eqi" as a case-independent comparison operator.
4044 20. The saslauthd authentication condition could segfault if neither service
4045 nor realm was specified.
4047 21. If an overflowing value such as "2048M" was set for message_size_limit, the
4048 error message that was logged was misleading, and incoming SMTP
4049 connections were dropped. The message is now more accurate, and temporary
4050 errors are given to SMTP connections.
4052 22. In some error situations (such as 21 above) Exim rejects all SMTP commands
4053 (except RSET) with a 421 error, until QUIT is received. However, it was
4054 failing to send a response to QUIT.
4056 23. The HELO ACL was being run before the code for helo_try_verify_hosts,
4057 which made it impossible to use "verify = helo" in the HELO ACL. The HELO
4058 ACL is now run after the helo_try_verify_hosts code.
4060 24. "{MD5}" and "{SHA1}" are now recognized as equivalent to "{md5"} and
4061 "{sha1}" in the "crypteq" expansion condition (in fact the comparison is
4062 case-independent, so other case variants are also recognized). Apparently
4063 some systems use these upper case variants.
4065 25. If more than two messages were waiting for the same host, and a transport
4066 filter was specified for the transport, Exim sent two messages over the
4067 same TCP/IP connection, and then failed with "socket operation on non-
4068 socket" when it tried to send the third.
4070 26. Added Exim::debug_write and Exim::log_write for embedded Perl use.
4072 27. The extern definition of crypt16() in expand.c was not being excluded when
4073 the OS had its own crypt16() function.
4075 28. Added bounce_return_body as a new option, and bounce_return_size_limit
4076 as a preferred synonym for return_size_limit, both as an option and as an
4079 29. Added LIBS=-liconv to OS/Makefile-OSF1.
4081 30. Changed the default configuration ACL to relax the local part checking rule
4082 for addresses that are not in any local domains. For these addresses,
4083 slashes and pipe symbols are allowed within local parts, but the sequence
4084 /../ is explicitly forbidden.
4086 31. SPA server authentication was not clearing the challenge buffer before
4089 32. log_message in a "warn" ACL statement was writing to the reject log as
4090 well as to the main log, which contradicts the documentation and doesn't
4091 seem right (because no rejection is happening). So I have stopped it.
4093 33. Added Ard Biesheuvel's lookup code for accessing an Interbase database.
4094 However, I am unable to do any testing of this.
4096 34. Fixed an infelicity in the appendfile transport. When checking directories
4097 for a mailbox, to see if any needed to be created, it was accidentally
4098 using path names with one or more superfluous leading slashes; tracing
4099 would show up entries such as stat("///home/ph10", 0xFFBEEA48).
4101 35. If log_message is set on a "discard" verb in a MAIL or RCPT ACL, its
4102 contents are added to the log line that is written for every discarded
4103 recipient. (Previously a log_message setting was ignored.)
4105 36. The ${quote: operator now quotes the string if it is empty.
4107 37. The install script runs exim in order to find its version number. If for
4108 some reason other than non-existence or emptiness, which it checks, it
4109 could not run './exim', it was installing it with an empty version number,
4110 i.e. as "exim-". This error state is now caught, and the installation is
4113 38. An argument was missing from the function that creates an error message
4114 when Exim fails to connect to the socket for saslauthd authentication.
4115 This could cause Exim to crash, or give a corrupted message.
4117 39. Added isip, isip4, and isip6 to ${if conditions.
4119 40. The ACL variables $acl_xx are now saved with the message, and can be
4120 accessed later in routers, transports, and filters.
4122 41. The new lookup type nwildlsearch is like wildlsearch, except that the key
4123 strings in the file are not string-expanded.
4125 42. If a MAIL command specified a SIZE value that was too large to fit into an
4126 int variable, the check against message_size_limit failed. Such values are
4127 now forced to INT_MAX, which is around 2Gb for a 32-bit variable. Maybe one
4128 day this will have to be increased, but I don't think I want to be around
4129 when emails are that large.
4136 1. Removed HAVE_ICONV=yes from OS/Makefile-FreeBSD, since it seems that
4137 iconv() is not standard in FreeBSD.
4139 2. Change 4.21/17 was buggy and could cause stack overwriting on a system with
4140 IPv6 enabled. The observed symptom was a segmentation fault on return from
4141 the function os_common_find_running_interfaces() in src/os.c.
4143 3. In the check_special_case() function in daemon.c I had used "errno" as an
4144 argument name, which causes warnings on some systems. This was basically a
4145 typo, since it was named "eno" in the comments!
4147 4. The code that waits for the clock to tick (at a resolution of some fraction
4148 of a second) so as to ensure message-id uniqueness was always waiting for
4149 at least one whole tick, when it could have waited for less. [This is
4150 almost certainly not relevant at current processor speeds, where it is
4151 unlikely to ever wait at all. But we try to future-proof.]
4153 5. The function that sleeps for a time interval that includes fractions of a
4154 second contained a race. It did not block SIGALRM between setting the
4155 timer, and suspending (a couple of lines later). If the interval was short
4156 and the sigsuspend() was delayed until after it had expired, the suspension
4157 never ended. On busy systems this could lead to processes getting stuck for
4160 6. Some uncommon configurations may cause a lookup to happen in a queue runner
4161 process, before it forks any delivery processes. The open lookup caching
4162 mechanism meant that the open file or database connection was passed into
4163 the delivery process. The problem was that delivery processes always tidy
4164 up cached lookup data. This could cause a problem for the next delivery
4165 process started by the queue runner, because the external queue runner
4166 process does not know about the closure. So the next delivery process
4167 still has data in the lookup cache. In the case of a file lookup, there was
4168 no problem because closing a file descriptor in a subprocess doesn't affect
4169 the parent. However, if the lookup was caching a connection to a database,
4170 the connection was closed, and the second delivery process was likely to
4171 see errors such as "PGSQL: query failed: server closed the connection
4172 unexpectedly". The problem has been fixed by closing all cached lookups
4173 in a queue runner before running a delivery process.
4175 7. Compiler warning on Linux for the second argument of iconv(), which doesn't
4176 seem to have the "const" qualifier which it has on other OS. I've
4179 8. Change 4.21/2 was too strict. It is only if there are two authenticators
4180 *of the same type* (client or server) with the same public name that an
4181 error should be diagnosed.
4183 9. When Exim looked up a host name for an IP address, but failed to find the
4184 original IP address when looking up the host name (a safety check), it
4185 output the message "<ip address> does not match any IP for NULL", which was
4186 confusing, to say the least. The bug was that the host name should have
4187 appeared instead of "NULL".
4189 10. Since release 3.03, if Exim is called by a uid other than root or the Exim
4190 user that is built into the binary, and the -C or -D options is used, root
4191 privilege is dropped before the configuration file is read. In addition,
4192 logging is switched to stderr instead of the normal log files. If the
4193 configuration then re-defines the Exim user, the unprivileged environment
4194 is probably not what is expected, so Exim logs a panic warning message (but
4197 However, if deliver_drop_privilege is set, the unprivileged state may well
4198 be exactly what is intended, so the warning has been cut out in that case,
4199 and Exim is allowed to try to write to its normal log files.
4205 1. smtp_return_error_details was not giving details for temporary sender
4206 or receiver verification errors.
4208 2. Diagnose a configuration error if two authenticators have the same public
4211 3. Exim used not to create the message log file for a message until the first
4212 delivery attempt. This could be confusing when incoming messages were held
4213 for policy or load reasons. The message log file is now created at the time
4214 the message is received, and an initial "Received" line is written to it.
4216 4. The automatically generated man page for command line options had a minor
4217 bug that caused no ill effects; however, a more serious problem was that
4218 the procedure for building the man page automatically didn't always
4219 operate. Consequently, release 4.20 contains an out-of-date version. This
4220 shouldn't happen again.
4222 5. When building Exim with embedded Perl support, the script that builds the
4223 Makefile was calling 'perl' to find its compile-time parameters, ignoring
4224 any setting of PERL_COMMAND in Local/Makefile. This is now fixed.
4226 6. The freeze_tell option was not being used for messages that were frozen on
4227 arrival, either by an ACL or by local_scan().
4229 7. Added the smtp_incomplete_transaction log selector.
4231 8. After STARTTLS, Exim was not forgetting that it had advertised AUTH, so it
4232 was accepting AUTH without a new EHLO.
4234 9. Added tls_remember_esmtp to cope with YAEB. This allows AUTH and other
4235 ESMTP extensions after STARTTLS without a new EHLO, in contravention of the
4238 10. Logging of TCP/IP connections (when configured) now happens in the main
4239 daemon process instead of the child process, so that the TCP/IP connection
4240 count is more accurate (but it can never be perfect).
4242 11. The use of "drop" in a nested ACL was not being handled correctly in the
4243 outer ACL. Now, if condition failure induced by the nested "drop" causes
4244 the outer ACL verb to deny access ("accept" or "discard" after "endpass",
4245 or "require"), the connection is dropped.
4247 12. Similarly, "discard" in a nested ACL wasn't being handled. A nested ACL
4248 that yield "discard" can now be used with an "accept" or a "discard" verb,
4249 but an error is generated for any others (because I can't see a useful way
4250 to define what should happen).
4252 13. When an ACL is read dynamically from a file (or anywhere else), the lines
4253 are now processed in the same way as lines in the Exim configuration file.
4254 In particular, continuation lines are supported.
4256 14. Added the "dnslists = a.b.c!=n.n.n.n" feature.
4258 15. Added -ti meaning -t -i.
4260 16. Check for letters, digits, hyphens, and dots in the names of dnslist
4261 domains, and warn by logging if others are found.
4263 17. At least on BSD, alignment is not guarenteed for the array of ifreq's
4264 returned from GIFCONF when Exim is trying to find the list of interfaces on
4265 a host. The code in os.c has been modified to copy each ifreq to an aligned
4266 structure in all cases.
4268 Also, in some cases, the returned ifreq's were being copied to a 'struct
4269 ifreq' on the stack, which was subsequently passed to host_ntoa(). That
4270 means the last couple of bytes of an IPv6 address could be chopped if the
4271 ifreq contained only a normal sockaddr (14 bytes storage).
4273 18. Named domain lists were not supported in the hosts_treat_as_local option.
4274 An entry such as +xxxx was not recognized, and was treated as a literal
4277 19. Ensure that header lines added by a DATA ACL are included in the reject log
4278 if the ACL subsequently rejects the message.
4280 20. Upgrade the cramtest.pl utility script to use Digest::MD5 instead of just
4281 MD5 (which is deprecated).
4283 21. When testing a filter file using -bf, Exim was writing a message when it
4284 took the sender from a "From " line in the message, but it was not doing so
4285 when it took $return_path from a Return-Path: header line. It now does.
4287 22. If the contents of a "message" modifier for a "warn" ACL verb do not begin
4288 with a valid header line field name (a series of printing characters
4289 terminated by a colon, Exim now inserts X-ACL-Warn: at the beginning.
4291 23. Changed "disc" in the source to "disk" to conform to the documentation and
4292 the book and for uniformity.
4294 24. Ignore Sendmail's -Ooption=value command line item.
4296 25. When execve() failed while trying to run a command in a pipe transport,
4297 Exim was returning EX_UNAVAILBLE (69) from the subprocess. However, this
4298 could be confused with a return value of 69 from the command itself. This
4299 has been changed to 127, the value the shell returns if it is asked to run
4300 a non-existent command. The wording for the related log line suggests a
4301 non-existent command as the problem.
4303 26. If received_header_text expands to an empty string, do not add a Received:
4304 header line to the message. (Well, it adds a token one on the spool, but
4305 marks it "old" so that it doesn't get used or transmitted.)
4307 27. Installed eximstats 1.28 (addition of -nt option).
4309 28. There was no check for failure on the call to getsockname() in the daemon
4310 code. This can fail if there is a shortage of resources on the system, with
4311 ENOMEM, for example. A temporary error is now given on failure.
4313 29. Contrary to the C standard, it seems that in some environments, the
4314 equivalent of setlocale(LC_ALL, "C") is not obeyed at the start of a C
4315 program. Exim now does this explicitly; it affects the formatting of
4316 timestamps using strftime().
4318 30. If exiqsumm was given junk data, it threw up some uninitialized variable
4319 complaints. I've now initialized all the variables, to avoid this.
4321 32. Header lines added by a system filter were not being "seen" during
4322 transport-time rewrites.
4324 33. The info_callback() function passed to OpenSSL is set up with type void
4325 (*)(SSL *, int, int), as described somewhere. However, when calling the
4326 function (actually a macro) that sets it up, the type void(*)() is
4327 expected. I've put in a cast to prevent warnings from picky compilers.
4329 34. If a DNS black list lookup found a CNAME record, but there were no A
4330 records associated with the domain it pointed at, Exim crashed.
4332 35. If a DNS black list lookup returned more than one A record, Exim ignored
4333 all but the first. It now scans all returned addresses if a particular IP
4334 value is being sought. In this situation, the contents of the
4335 $dnslist_value variable are a list of all the addresses, separated by a
4338 36. Tightened up the rules for host name lookups using reverse DNS. Exim used
4339 to accept a host name and all its aliases if the forward lookup for any of
4340 them yielded the IP address of the incoming connection. Now it accepts only
4341 those names whose forward lookup yields the correct IP address. Any other
4342 names are discarded. This closes a loophole whereby a rogue DNS
4343 administrator could create reverse DNS records to break through a
4344 wildcarded host restriction in an ACL.
4346 37. If a user filter or a system filter that ran in a subprocess used any of
4347 the numerical variables ($1, $2 etc), or $thisaddress, in a pipe command,
4348 the wrong values were passed to the pipe command ($thisaddress had the
4349 value of $0, $0 had the value of $1, etc). This bug was introduced by
4350 change 4.11/101, and not discovered because I wrote an inadequate test. :-(
4352 38. Improved the line breaking for long SMTP error messages from ACLs.
4353 Previously, if there was no break point between 40 and 75 characters, Exim
4354 left the rest of the message alone. Two changes have been made: (a) I've
4355 reduced the minimum length to 35 characters; (b) if it can't find a break
4356 point between 35 and 75 characters, it looks ahead and uses the first one
4357 that it finds. This may give the occasional overlong line, but at least the
4358 remaining text gets split now.
4360 39. Change 82 of 4.11 was unimaginative. It assumed the limit on the number of
4361 file descriptors might be low, and that setting 1000 would always raise it.
4362 It turns out that in some environments, the limit is already over 1000 and
4363 that lowering it causes trouble. So now Exim takes care not to decrease it.
4365 40. When delivering a message, the value of $return_path is set to $sender_
4366 address at the start of routing (routers may change the value). By an
4367 oversight, this default was not being set up when an address was tested by
4368 -bt or -bv, which affected the outcome if any router or filter referred to
4371 41. The idea of the "warn" ACL verb is that it adds a header or writes to the
4372 log only when "message" or "log_message" are set. However, if one of the
4373 conditions was an address verification, or a call to a nested ACL, the
4374 messages generated by the underlying test were being passed through. This
4375 no longer happens. The underlying message is available in $acl_verify_
4376 message for both "message" and "log_message" expansions, so it can be
4377 passed through if needed.
4379 42. Added RFC 2047 interpretation of header lines for $h_ expansions, with a
4380 new expansion $bh_ to give the encoded byte string without charset
4381 translation. Translation happens only if iconv() is available; HAVE_ICONV
4382 indicates this at build time. HEADERS_CHARSET gives the charset to
4383 translate to; headers_charset can change it in the configuration, and
4384 "headers charset" can change it in an individual filter file.
4386 43. Now that we have a default RFC 2047 charset (see above), the code in Exim
4387 that creates RFC 2047 encoded "words" labels them as that charset instead
4388 of always using iso-8859-1. The cases are (i) the explicit ${rfc2047:
4389 expansion operator; (ii) when Exim creates a From: line for a local
4390 message; (iii) when a header line is rewritten to include a "phrase" part.
4392 44. Nasty bug in exiqsumm: the regex to skip already-delivered addresses was
4393 buggy, causing it to skip the first lines of messages whose message ID
4394 ended in 'D'. This would not have bitten before Exim release 4.14, because
4395 message IDs were unlikely to end in 'D' before then. The effect was to have
4396 incorrect size information for certain domains.
4398 45. #include "config.h" was missing at the start of the crypt16.c module. This
4399 caused trouble on Tru64 (aka OSF1) systems, because HAVE_CRYPT16 was not
4402 46. If there was a timeout during a "random" callout check, Exim treated it as
4403 a failure of the random address, and carried on sending RSET and the real
4404 address. If the delay was just some slowness somewhere, the response to the
4405 original RCPT would be taken as a response to RSET and so on, causing
4406 mayhem of various kinds.
4408 47. Change 50 for 4.20 was a heap of junk. I don't know what I was thinking
4409 when I implemented it. It didn't allow for the fact that some option values
4410 may legitimatetly be negative (e.g. size_addition), and it didn't even do
4411 the right test for positive values.
4413 48. Domain names in DNS records are case-independent. Exim always looks them up
4414 in lower case. Some resolvers return domain names in exactly the case they
4415 appear in the zone file, that is, they may contain uppercase letters. Not
4416 all resolvers do this - some return always lower case. Exim was treating a
4417 change of case by a resolver as a change of domain, similar to a widening
4418 of a domain abbreviation. This triggered its re-routing code and so it was
4419 trying to route what was effectively the same domain again. This normally
4420 caused routing to fail (because the router wouldn't handle the domain
4421 twice). Now Exim checks for this case specially, and just changes the
4422 casing of the domain that it ultimately uses when it transmits the message
4425 49. Added Sieve (RFC 3028) support, courtesy of Michael Haardt's contributed
4428 50. If a filter generated a file delivery with a non-absolute name (possible if
4429 no home directory exists for the router), the forbid_file option was not
4432 51. Added '&' feature to dnslists, to provide bit mask matching in addition to
4433 the existing equality matching.
4435 52. Exim was using ints instead of ino_t variables in some places where it was
4436 dealing with inode numbers.
4438 53. If TMPDIR is defined in Local/Makefile (default in src/EDITME is
4439 TMPDIR="/tmp"), Exim checks for the presence of an environment variable
4440 called TMPDIR, and if it finds it is different, it changes its value.
4442 54. The smtp_printf() function is now made available to local_scan() so
4443 additional output lines can be written before returning. There is also an
4444 smtp_fflush() function to enable the detection of a dropped connection.
4445 The variables smtp_input and smtp_batched_input are exported to
4448 55. Changed the default runtime configuration: the message "Unknown user"
4449 has been removed from the ACL, and instead placed on the localuser router,
4450 using the cannot_route_message feature. This means that any verification
4451 failures that generate their own messages won't get overridden. Similarly,
4452 the "Unrouteable address" message that was in the ACL for unverifiable
4453 relay addresses has also been removed.
4455 56. Added hosts_avoid_esmtp to the smtp transport.
4457 57. The exicyclog script was not checking for the esoteric option
4458 CONFIGURE_FILE_USE_EUID in the Local/Makefile. It now does this, but it
4459 will work only if exicyclog is run under the appropriate euid.
4461 58. Following a discussion on the list, the rules by which Exim recognises line
4462 endings on incoming messages have been changed. The -dropcr and drop_cr
4463 options are now no-ops, retained only for backwards compatibility. The
4464 following line terminators are recognized: LF CRLF CR. However, special
4465 processing applies to CR:
4467 (i) The sequence CR . CR does *not* terminate an incoming SMTP message,
4468 nor a local message in the state where . is a terminator.
4470 (ii) If a bare CR is encountered in a header line, an extra space is added
4471 after the line terminator so as not to end the header. The reasoning
4472 behind this is that bare CRs in header lines are most likely either
4473 to be mistakes, or people trying to play silly games.
4475 59. The size of a message, as listed by "-bp" or in the Exim monitor window,
4476 was being incorrectly given as 18 bytes larger than it should have been.
4477 This is a VOB (very old bug).
4479 60. This may never have affected anything current, but just in case it has:
4480 When the local host is found other than at the start of a list of hosts,
4481 the local host, those with the same MX, and any that follow, are discarded.
4482 When the list in question was part of a longer list of hosts, the following
4483 hosts (not currently being processed) were also being discarded. This no
4484 longer happens. I'm not sure if this situation could ever has previously
4487 61. Added the "/MX" feature to lists of hosts in the manualroute and query
4490 62. Whenever Exim generates a new message, it now adds an Auto-Submitted:
4491 header. This is something that is recommended in a new Internet Draft, and
4492 is something that is documented as being done by Sendmail. There are two
4493 possible values. For messages generated by the autoreply transport, Exim
4496 Auto-Submitted: auto-replied
4498 whereas for all other generated messages (e.g. bounces) it adds
4500 Auto-Submitted: auto-generated
4502 63. The "personal" condition in filters now includes a test for the
4503 Auto-Submitted: header. If it contains the string "auto-" the message it
4504 not considered personal.
4506 64. Added rcpt_include_affixes as a generic transport option.
4508 65. Added queue_only_override (default true).
4510 66. Added the syslog_duplication option.
4512 67. If what should have been the first header line of a message consisted of
4513 a space followed by a colon, Exim was mis-interpreting it as a header line.
4514 It isn't of course - it is syntactically invalid and should therefore be
4515 treated as the start of the message body. The misbehaviour could have
4516 caused a number of strange effects, including loss of data in subsequent
4517 header lines, and spool format errors.
4519 68. Formerly, the AUTH parameter on a MAIL command was trusted only if the
4520 client host had authenticated. This control can now be exercised by an ACL
4521 for more flexibility.
4523 69. By default, callouts do not happen when testing with -bh. There is now a
4524 variant, -bhc, which does actually run the callout code, including
4525 consulting and updating the callout cache.
4527 70. Added support for saslauthd authentication, courtesy of Alexander
4530 71. If statvfs() failed on the spool or log directories while checking their
4531 size for availability, Exim confusingly gave the error "space shortage".
4532 Furthermore, in debugging mode it crashed with a floating point exception.
4533 These checks are done if check_{spool,log}_{space,inodes} are set, and when
4534 an SMTP message arrives with SIZE= on the MAIL command. As this is a really
4535 serious problem, Exim now writes to the main and panic logs when this
4536 happens, with details of the failure. It then refuses to accept the
4537 incoming message, giving the message "spool directory problem" or "log
4538 directory problem" with a 421 code for SMTP messages.
4540 72. When Exim is about to re-exec itself, it ensures that the file descriptors
4541 0, 1, and 2 exist, because some OS complain for execs without them (see
4542 ChangeLog 4.05/30). If necessary, Exim opens /dev/null to use for these
4543 descriptors. However, the code omitted to check that the open succeeded,
4544 causing mysterious errors if for some reason the permissions on /dev/null
4545 got screwed. Now Exim writes a message to the main and panic logs, and
4546 bombs out if it can't open /dev/null.
4548 73. Re-vamped the way daemon_smtp_port, local_interfaces, and -oX work and
4549 interact so that it is all more flexible. It is supposed to remain
4550 backwards compatible. Also added extra_local_interfaces.
4552 74. Invalid data sent to a SPA (NTLM) server authenticator could cause the code
4553 to bomb out with an assertion failure - to the client this appears as a
4554 connection drop. This problem occurs in the part of the code that was taken
4555 from the Samba project. Fortunately, the assertion is in a very simple
4556 function, so I have fixed this by reproducing the function inline in the
4557 one place where it is called, and arranging for authentication to fail
4558 instead of killing the process with assert().
4560 75. The SPA client code was not working when the server requested OEM rather
4561 than Unicode encoding.
4563 76. Added code to make require_files with a specific uid setting more usable in
4564 the case where statting the file as root fails - usually a non-root-mounted
4565 NFS file system. When this happens and the failure is EACCES, Exim now
4566 forks a subprocess and does the per-uid checking as the relevant uid.
4568 77. Added process_log_path.
4570 78. If log_file_path was not explicitly set, a setting of check_log_space or
4571 check_log_inodes was ignored.
4573 79. If a space check for the spool or log partitions fails, the incident is now
4574 logged. Of course, in the latter case the data may get lost...
4576 80. Added the %p formatting code to string_format() so that it can be used to
4577 print addresses in debug_print(). Adjusted all the address printing in the
4578 debugging in store.c to use %p rather than %d.
4580 81. There was a concern that a line of code in smtp_in.c could overflow a
4581 buffer if a HELO/EHLO command was given followed by 500 or so spaces. As
4582 initially expressed, the concern was not well-founded, because trailing
4583 spaces are removed early. However, if the trailing spaces were followed by
4584 a NULL, they did not get removed, so the overflow was possible. Two fixes
4587 (a) I re-wrote the offending code in a cleaner fashion.
4588 (b) If an incoming SMTP command contains a NULL character, it is rejected
4591 82. When Exim changes uid/gid to the Exim user at daemon start time, it now
4592 runs initgroups(), so that if the Exim user is in any additional groups,
4593 they will be used during message reception.
4599 The change log for 4.20 and earlier releases has been archived.
git://git.exim.org / users / jgh / exim.git / blob