1 $Cambridge: exim/doc/doc-txt/ChangeLog,v 1.410 2006/10/16 15:44:36 ph10 Exp $
3 Change log file for Exim from version 4.21
4 -------------------------------------------
9 TF/01 In the add_headers option to the mail command in an Exim filter,
10 there was a bug that Exim would claim a syntax error in any
11 header after the first one which had an odd number of characters
14 PH/01 If a server that rejects MAIL FROM:<> was the target of a sender
15 callout verification, Exim cached a "reject" for the entire domain. This
16 is correct for most verifications, but it is not correct for a recipient
17 verification with use_sender or use_postmaster set, because in that case
18 the callout does not use MAIL FROM:<>. Exim now distinguishes the special
19 case of MAIL FROM:<> rejection from other early rejections (e.g.
20 rejection of HELO). When verifying a recipient using a non-null MAIL
21 address, the cache is ignored if it shows MAIL FROM:<> rejection.
22 Whatever the result of the callout, the value of the domain cache is
23 left unchanged (for any other kind of callout, getting as far as trying
24 RCPT means that the domain itself is ok).
26 PH/02 Tidied a number of unused variable and signed/unsigned warnings that
29 PH/03 On Solaris, an unexpectedly close socket (dropped connection) can
30 manifest itself as EPIPE rather than ECONNECT. When tidying away a
31 session, the daemon ignores ECONNECT errors and logs others; it now
32 ignores EPIPE as well.
34 PH/04 Applied Nico Erfurth's refactoring patch to tidy up mime.c
35 (quoted-printable decoding).
37 PH/05 Applied Nico Erfurth's refactoring patch to tidy up spool_mbox.c, and
38 later the small subsequent patch to fix an introduced bug.
40 PH/06 Installed the latest Cygwin Makefile from the Cygwin maintainer.
42 PH/07 There was no check for overflow in expansions such as ${if >{1}{4096M}}.
44 PH/08 An error is now given if message_size_limit is specified negative.
46 PH/09 Applied and tidied up Jakob Hirsch's patch for allowing ACL variables
47 to be given (somewhat) arbitrary names.
49 JJ/01 exipick 20060919.0, allow for arbitrary acl_ variables introduced
52 JJ/02 exipick 20060919.0, --show-vars args can now be regular expressions,
53 miscellaneous code fixes
55 PH/10 Added the log_reject_target ACL modifier to specify where to log
58 PH/11 Callouts were setting the name used for EHLO/HELO from $smtp_active_
59 hostname. This is wrong, because it relates to the incoming message (and
60 probably the interface on which it is arriving) and not to the outgoing
61 callout (which could be using a different interface). This has been
62 changed to use the value of the helo_data option from the smtp transport
63 instead - this is what is used when a message is actually being sent. If
64 there is no remote transport (possible with a router that sets up host
65 addresses), $smtp_active_hostname is used.
67 PH/12 Installed Andrey Panin's patch to add a dovecot authenticator. Various
68 tweaks were necessary in order to get it to work (see also 21 below):
69 (a) The code assumed that strncpy() returns a negative number on buffer
70 overflow, which isn't the case. Replaced with Exim's string_format()
72 (b) There were several signed/unsigned issues. I just did the minimum
73 hacking in of casts. There is scope for a larger refactoring.
74 (c) The code used strcasecmp() which is not a standard C function.
75 Replaced with Exim's strcmpic() function.
76 (d) The code set only $1; it now sets $auth1 as well.
77 (e) A simple test gave the error "authentication client didn't specify
78 service in request". It would seem that Dovecot has changed its
79 interface. Fortunately there's a specification; I followed it and
80 changed what the client sends and it appears to be working now.
82 PH/13 Added $message_headers_raw to provide the headers without RFC 2047
85 PH/14 Corrected misleading output from -bv when -v was also used. Suppose the
86 address A is aliased to B and C, where B exists and C does not. Without
87 -v the output is "A verified" because verification stops after a
88 successful redirection if more than one address is generated. However,
89 with -v the child addresses are also verified. Exim was outputting "A
90 failed to verify" and then showing the successful verification for C,
91 with its parentage. It now outputs "B failed to verify", showing B's
92 parentage before showing the successful verification of C.
94 PH/15 Applied Michael Deutschmann's patch to allow DNS black list processing to
95 look up a TXT record in a specific list after matching in a combined
98 PH/16 It seems that the options setting for the resolver (RES_DEFNAMES and
99 RES_DNSRCH) can affect the behaviour of gethostbyname() and friends when
100 they consult the DNS. I had assumed they would set it the way they
101 wanted; and indeed my experiments on Linux seem to show that in some
102 cases they do (I could influence IPv6 lookups but not IPv4 lookups).
103 To be on the safe side, however, I have now made the interface to
104 host_find_byname() similar to host_find_bydns(), with an argument
105 containing the DNS resolver options. The host_find_byname() function now
106 sets these options at its start, just as host_find_bydns() does. The smtp
107 transport options dns_qualify_single and dns_search_parents are passed to
108 host_find_byname() when gethostbyname=TRUE in this transport. Other uses
109 of host_find_byname() use the default settings of RES_DEFNAMES
110 (qualify_single) but not RES_DNSRCH (search_parents).
112 PH/17 Applied (a modified version of) Nico Erfurth's patch to make
113 spool_read_header() do less string testing, by means of a preliminary
114 switch on the second character of optional "-foo" lines. (This is
115 overdue, caused by the large number of possibilities that now exist.
116 Originally there were few.) While I was there, I also converted the
117 str(n)cmp tests so they don't re-test the leading "-" and the first
118 character, in the hope this might squeeze out yet more improvement.
120 PH/18 Two problems with "group" syntax in header lines when verifying: (1) The
121 flag allowing group syntax was set by the header_syntax check but not
122 turned off, possible causing trouble later; (2) The flag was not being
123 set at all for the header_verify test, causing "group"-style headers to
124 be rejected. I have now set it in this case, and also caused header_
125 verify to ignore an empty address taken from a group. While doing this, I
126 came across some other cases where the code for allowing group syntax
127 while scanning a header line wasn't quite right (mostly, not resetting
128 the flag correctly in the right place). These bugs could have caused
129 trouble for malformed header lines. I hope it is now all correct.
131 PH/19 The functions {pwcheck,saslauthd}_verify_password() are always called
132 with the "reply" argument non-NULL. The code, however (which originally
133 came from elsewhere) had *some* tests for NULL when it wrote to *reply,
134 but it didn't always do it. This confused somebody who was copying the
135 code for some other use. I have removed all the tests.
137 PH/20 It was discovered that the GnuTLS code had support for RSA_EXPORT, a
138 feature that was used to support insecure browsers during the U.S. crypto
139 embargo. It requires special client support, and Exim is probably the
140 only MTA that supported it -- and would never use it because real RSA is
141 always available. This code has been removed, because it had the bad
142 effect of slowing Exim down by computing (never used) parameters for the
143 RSA_EXPORT functionality.
145 PH/21 On the advice of Timo Sirainen, added a check to the dovecot
146 authenticator to fail if there's a tab character in the incoming data
147 (there should never be unless someone is messing about, as it's supposed
148 to be base64-encoded). Also added, on Timo's advice, the "secured" option
149 if the connection is using TLS or if the remote IP is the same as the
150 local IP, and the "valid-client-cert option" if a client certificate has
153 PH/22 As suggested by Denis Davies, added a server_condition option to *all*
154 authenticators. This can be used for authorization after authentication
155 succeeds. (In the case of plaintext, it servers for both authentication
162 SC/01 Use a glob alias rather than an array ref in eximstats generated
163 parser. This improves both readability and performance.
165 SC/02 Collect SpamAssassin and rejection statistics in eximstats.
166 Don't display local sender or destination tables in eximstats unless
167 there is data to show.
168 Added average volumes into the eximstats top table text output.
170 SC/03 Collect data on the number of addresses (recipients) as well
171 as the number of messages in eximstats.
173 TF/01 Correct an error in the documentation for the redirect router. Exim
174 does (usually) call initgroups() when daemonizing.
176 TF/02 Call initgroups() when dropping privilege in exim.c, so that Exim runs
177 with consistent privilege compared to when running as a daemon.
179 TF/03 Note in the spec that $authenticated_id is not set for local
180 submissions from trusted users.
182 TF/04 The ratelimit per_rcpt option now works correctly in acl_not_smtp.
183 Thanks to Dean Brooks <dean@iglou.com> for the patch.
185 TF/05 Make it easier to get SMTP authentication and TLS/SSL support working
186 by adding some example configuration directives to the default
187 configuration file. A little bit of work is required to uncomment the
188 directives and define how usernames and passwords are checked, but
189 there is now a framework to start from.
191 PH/01 Added #define LDAP_DEPRECATED 1 to ldap.c because some of the "old"
192 functions that Exim currently uses aren't defined in ldap.h for OpenLDAP
193 without this. I don't know how relevant this is to other LDAP libraries.
195 PH/02 Add the verb name to the "unknown ACL verb" error.
197 PH/03 Magnus Holmgren's patch for filter_prepend_home.
199 PH/03 Fixed Bugzilla #101: macro definition between ACLs doesn't work.
201 PH/04 Applied Magnus Holmgren's patch to fix Bugzilla #98: transport's home
202 directory not expanded when it should be if an expanded home directory
203 was set for the address (which is overridden by the transport).
205 PH/05 Applied Alex Kiernan's patch to fix Bugzilla #99: a problem with
208 PH/06 Added acl_not_smtp_start, based on Johannes Berg's patch, and set the
209 bit to forbid control=suppress_local_fixups in the acl_not_smtp ACL,
210 because it is too late at that time, and has no effect.
212 PH/07 Changed ${quote_pgsql to quote ' as '' instead of \' because of a
213 security issue with \' (bugzilla #107). I could not use the
214 PQescapeStringConn() function, because it needs a PGconn value as one of
217 PH/08 When testing addresses using -bt, indicate those final addresses that
218 are duplicates that would not cause an additional delivery. At least one
219 person was confused, thinking that -bt output corresponded to deliveries.
220 (Suppressing duplicates isn't a good idea as you lose the information
221 about possibly different redirections that led to the duplicates.)
223 PH/09 Applied patch from Erik to use select() instead of poll() in spam.c on
224 systems where poll() doesn't work, in particular OS X.
226 PH/10 Added more information to debugging output for retry time not reached.
228 PH/11 Applied patch from Arkadiusz Miskiewicz to apply a timeout to read
229 operations in malware.c.
231 PH/12 Applied patch from Magnus Holmgren to include the "h" tag in Domain Keys
234 PH/13 If write_rejectlog was set false when logging was sent to syslog with
235 syslog_duplication set false, log lines that would normally be written
236 both the the main log and to the reject log were not written to syslog at
239 PH/14 In the default configuration, change the use of "message" in ACL warn
240 statements to "add_header".
242 PH/15 Diagnose a filter syntax error for "seen", "unseen", or "noerror" if not
243 not followed by a command (e.g. "seen endif").
245 PH/16 Recognize SMTP codes at the start of "message" in ACLs and after :fail:
246 and :defer: in a redirect router. Add forbid_smtp_code to suppress the
249 PH/17 Added extra conditions to the default value of delay_warning_condition
253 { !eq{$h_list-id:$h_list-post:$h_list-subscribe:}{} } \
254 { match{$h_precedence:}{(?i)bulk|list|junk} } \
255 { match{$h_auto-submitted:}{(?i)auto-generated|auto-replied} } \
258 The Auto-Submitted: and various List- headers are standardised, whereas I
259 don't think Precedence: ever was.
261 PH/18 Refactored debugging code in route_finduser() to show more information,
262 in particular, the error code if getpwnam() issues one.
264 PH/19 Added PQsetClientEncoding(conn, "SQL_ASCII") to the pgsql code module.
265 This is apparently needed in addition to the PH/07 change above to avoid
266 any possible encoding problems.
268 PH/20 Perl can change the locale. Exim was resetting it after a ${perl call,
269 but not after initializing Perl.
271 PH/21 Added a call to PQsetNoticeProcessor() to catch pgsql "notices" and
272 output them only if debugging. By default they are written stderr,
273 apparently, which is not desirable.
275 PH/22 Added Alain Williams' LDAP patch to support setting REFERRALS=off on
278 JJ/01 exipick: added --reverse (and -R synonym), --random, --size, --sort and
281 JJ/02 exipick: rewrote --help documentation to hopefully make more clear.
283 PH/23 Made -oMaa and -oMt work with -bh and -bs to pretend the connection is
284 authenticated or an ident call has been made. Suppress the default
285 values for $authenticated_id and $authenticated_sender (but permit -oMai
286 and -oMas) when testing with -bh.
288 PH/24 Re-jigged the order of the tests in the default configuration so that the
289 tests for valid domains and recipients precede the DNS black list and CSA
290 tests, on the grounds that those ones are more expensive.
292 PH/25 Exim was not testing for a space following SMTP commands such as EHLO
293 that require one. Thus, EHLORHUBARB was interpreted as a valid command.
294 This bug exists in every version of Exim that I still have, right back to
297 PH/26 (n)wildlsearch lookups are documented as being done case-insensitively.
298 However, an attempt to turn on case-sensitivity in a regex key by
299 including (?-i) didn't work because the subject string was already
300 lowercased, and the effects were non-intuitive. It turns out that a
301 one-line patch can be used to allow (?-i) to work as expected.
307 TF/01 Fix the add_header change below (4.61 PH/55) which had a bug that (amongst
308 other effects) broke the use of negated acl sub-conditions.
310 PH/01 ${readsocket now supports Internet domain sockets (modified John Jetmore
313 PH/02 When tcp-wrappers is called from Exim, it returns only "deny" or "allow".
314 "Deny" causes Exim to reject the incoming connection with a 554 error.
315 Unfortunately, if there is a major crisis, such as a disk failure,
316 tcp-wrappers gives "deny", whereas what one would like would be some
317 kind of temporary error. A kludge has been added to help with this.
318 Before calling hosts_ctl(), errno is set zero. If the result is "deny", a
319 554 error is used if errno is still zero or contains ENOENT (which occurs
320 if either of the /etc/hosts.{allow,deny} files is missing). Otherwise, a
323 PH/03 Add -lutil to the default FreeBSD LIBS setting.
325 PH/04 Change PH/19 for 4.61 was too wide. It should not be applied to host
326 errors. Otherwise a message that provokes a temporary error (when other
327 messages do not) can cause a whole host to time out.
329 PH/05 Batch deliveries by appendfile and pipe transports did not work when the
330 addresses were routed directly to files or pipes from a redirect router.
331 File deliveries just didn't batch; pipe deliveries might have suffered
334 PH/06 A failure to get a lock for a hints database would erroneously always say
335 "Failed to get write lock", even when it was really a read lock.
337 PH/07 The appendfile transport was creating MBX lock files with a fixed mode
338 of 0600. This has been changed to use the value of the lockfile_mode
339 option (which defaults to 0600).
341 PH/08 Applied small patch from the Sieve maintainer.
343 PH/09 If maildir_quota_directory_regex was set to exclude (say) the .Trash
344 folder from quota calculations, a direct delivery into this folder messed
345 up the contents of the maildirsize file. This was because the regex was
346 used only to exclude .Trash (or whatever) when the size of the mailbox
347 was calculated. There was no check that a delivery was happening into an
348 excluded directory. This bug has been fixed by ignoring all quota
349 processing for deliveries into excluded directories.
351 PH/10 Added the maildirfolder_create_regex option to appendfile.
357 PH/01 The code for finding all the local interface addresses on a FreeBSD
358 system running IPv6 was broken. This may well have applied to all BSD
359 systems, as well as to others that have similar system calls. The broken
360 code found IPv4 interfaces correctly, but gave incorrect values for the
361 IPv6 interfaces. In particular, ::1 was not found. The effect in Exim was
362 that it would not match correctly against @[] and not recognize the IPv6
365 PH/02 The ipliteral router was not recognizing addresses of the form user@
366 [ipv6:....] because it didn't know about the "ipv6:" prefix.
368 PH/03 Added disable_ipv6.
370 PH/04 Changed $reply_address to use the raw form of the headers instead of the
371 decoded form, because it is most often used to construct To: headers
372 lines in autoreplies, and the decoded form may well be syntactically
373 invalid. However, $reply_address has leading white space removed, and all
374 newlines turned into spaces so that the autoreply transport does not
377 PH/05 If group was specified without a user on a router, and no group or user
378 was specified on a transport, the group from the router was ignored.
380 PH/06 Increased the number of ACL variables to 20 of each type, and arranged
381 for visible compile-time settings that can be used to change these
382 numbers, for those that want even more. Backwards compatibility with old
383 spool files has been maintained. However, going back to a previous Exim
384 release will lost any variables that are in spool files.
386 PH/07 Two small changes when running in the test harness: increase delay when
387 passing a TCP/IP connection to a new process, in case the original
388 process has to generate a bounce, and remove special handling of
389 127.0.0.2 (sic), which is no longer necessary.
391 PH/08 Changed debug output of dbfn_open() flags from numbers to names, so as to
392 be the same on different OS.
394 PH/09 Moved a debug statement in filter processing to avoid a race problem when
397 JJ/01 exipick: fixed bug where -b (brief) output option showed "Vars:"
398 whether --show-vars was specified or not
400 JJ/02 exipick: Added support for new ACL variable spool format introduced
403 PH/10 Fixed another bug related to PH/04 above: if an incoming message had a
404 syntactically invalid From: or Reply-to: line, and a filter used this to
405 generate an autoreply, and therefore failed to obtain an address for the
406 autoreply, Exim could try to deliver to a non-existent relative file
407 name, causing unrelated and misleading errors. What now happens is that
408 it logs this as a hard delivery error, but does not attempt to create a
411 PH/11 The exinext utility has a -C option for testing purposes, but although
412 the given file was scanned by exinext itself; it wasn't being passed on
413 when Exim was called.
415 PH/12 In the smtp transport, treat an explicit ECONNRESET error the same as
416 an end-of-file indication when reading a command response.
418 PH/13 Domain literals for IPv6 were not recognized unless IPv6 support was
419 compiled. In many other places in Exim, IPv6 addresses are always
420 recognized, so I have changed this. It also means that IPv4 domain
421 literals of the form [IPV4:n.n.n.n] are now always recognized.
423 PH/14 When a uid/gid is specified for the queryprogram router, it cannot be
424 used if the router is not running as root, for example, when verifying at
425 ACL time, or when using -bh. The debugging output from this situation was
426 non-existent - all you got was a failure to exec. I have made two
429 (a) Failures to set uid/gid, the current directory, or a process leader
430 in a subprocess such as that created by queryprogram now generate
431 suitable debugging ouput when -d is set.
433 (b) The queryprogram router detects when it is not running as root,
434 outputs suitable debugging information if -d is set, and then runs
435 the subprocess without attempting to change uid/gid.
437 PH/15 Minor change to Makefile for building test_host (undocumented testing
440 PH/16 As discussed on the list in Nov/Dec: Exim no longer looks at the
441 additional section of a DNS packet that returns MX or SRV records.
442 Instead, it always explicitly searches for A/AAAA records. This avoids
443 major problems that occur when a DNS server includes only records of one
444 type (A or AAAA) in an MX/SRV packet. A byproduct of this change has
445 fixed another bug: if SRV records were looked up and the corresponding
446 address records were *not* found in the additional section, the port
447 values from the SRV records were lost.
449 PH/17 If a delivery to a pipe, file, or autoreply was deferred, Exim was not
450 using the correct key (the original address) when searching the retry
451 rules in order to find which one to use for generating the retry hint.
453 PH/18 If quota_warn_message contains a From: header, Exim now refrains from
454 adding the default one. Similarly, if it contains a Reply-To: header, the
455 errors_reply_to option, if set, is not used.
457 PH/19 When calculating a retry time, Exim used to measure the "time since
458 failure" by looking at the "first failed" field in the retry record. Now
459 it does not use this if it is later than than the arrival time of the
460 message. Instead it uses the arrival time. This makes for better
461 behaviour in cases where some deliveries succeed, thus re-setting the
462 "first failed" field. An example is a quota failure for a huge message
463 when small messages continue to be delivered. Without this change, the
464 "time since failure" will always be short, possible causing more frequent
465 delivery attempts for the huge message than are intended.
466 [Note: This change was subsequently modified - see PH/04 for 4.62.]
468 PH/20 Added $auth1, $auth2, $auth3 to contain authentication data (as well as
469 $1, $2, $3) because the numerical variables can be reset during some
470 expansion items (e.g. "match"), thereby losing the authentication data.
472 PH/21 Make -bV show the size of off_t variables so that the test suite can
473 decide whether to run tests for quotas > 2G.
475 PH/22 Test the values given for quota, quota_filecount, quota_warn_threshold,
476 mailbox_size, and mailbox_filecount in the appendfile transport. If a
477 filecount value is greater than 2G or if a quota value is greater than 2G
478 on a system where the size of off_t is not greater than 4, a panic error
481 PH/23 When a malformed item such as 1.2.3/24 appears in a host list, it can
482 never match. The debug and -bh output now contains an explicit error
483 message indicating a malformed IPv4 address or mask.
485 PH/24 An host item such as 1.2.3.4/abc was being treated as the IP address
486 1.2.3.4 without a mask. Now it is not recognized as an IP address, and
489 PH/25 Do not write to syslog when running in the test harness. The only
490 occasion when this arises is a failure to open the main or panic logs
491 (for which there is an explicit test).
493 PH/26 Added the /no_tell option to "control=freeze".
495 PH/27 If a host name lookup failed very early in a connection, for example, if
496 the IP address matched host_lookup and the reverse lookup yielded a name
497 that did not have a forward lookup, an error message of the form "no IP
498 address found for host xxx.xxx.xxx (during SMTP connection from NULL)"
499 could be logged. Now it outputs the IP address instead of "NULL".
501 PH/28 An enabling patch from MH: add new function child_open_exim2() which
502 allows the sender and the authenticated sender to be set when
503 submitting a message from within Exim. Since child_open_exim() is
504 documented for local_scan(), the new function should be too.
506 PH/29 In GnuTLS, a forced expansion failure for tls_privatekey was not being
507 ignored. In both GnuTLS and OpenSSL, an expansion of tls_privatekey that
508 results in an empty string is now treated as unset.
510 PH/30 Fix eximon buffer overflow bug (Bugzilla #73).
512 PH/31 Added sender_verify_fail logging option.
514 PH/32 In November 2003, the code in Exim that added an empty Bcc: header when
515 needed by RFC 822 but not by RFC 2822 was commented out. I have now
516 tidied the source and removed it altogether.
518 PH/33 When a queue run was abandoned because the load average was too high, a
519 log line was always written; now it is written only if the queue_run log
520 selector is set. In addition, the log line for abandonment now contains
521 information about the queue run such as the pid. This is always present
522 in "start" and "stop" lines but was omitted from the "abandon" line.
524 PH/34 Omit spaces between a header name and the colon in the error message that
525 is given when verify = headers_syntax fails (if there are lots of them,
526 the message gets confusing).
528 PH/35 Change the default for dns_check_names_pattern to allow slashes within
529 names, as there are now some PTR records that contain slashes. This check
530 is only to protect against broken name servers that fall over on strange
531 characters, so the fact that it applies to all lookups doesn't matter.
533 PH/36 Now that the new test suite is complete, we can remove some of the
534 special code in Exim that was needed for the old test suite. For example,
535 sorting DNS records because real resolvers return them in an arbitrary
536 order. The new test suite's fake resolver always returns records in the
539 PH/37 When running in the test harness, use -odi for submitted messages (e.g.
540 bounces) except when queue_only is set, to avoid logging races between
541 the different processes.
543 PH/38 Panic-die if .include specifies a non-absolute path.
545 PH/39 A tweak to the "H" retry rule from its user.
547 JJ/03 exipick: Removed parentheses from 'next' and 'last' calls that specified
548 a label. They prevented compilation on older perls.
550 JJ/04 exipick: Refactored code to prevent implicit split to @_ which caused
551 a warning to be raised on newish perls.
553 JJ/05 exipick: Fixed bug where -bpc always showed a count of all messages
554 on queue. Changes to match documented behaviour of showing count of
555 messages matching specified criteria.
557 PH/40 Changed the default ident timeout from 30s to 5s.
559 PH/41 Added support for the use of login_cap features, on those BSD systems
560 that have them, for controlling the resources used by pipe deliveries.
562 PH/42 The content-scanning code uses fopen() to create files in which to put
563 message data. Previously it was not paying any attention to the mode of
564 the files. Exim runs with umask(0) because the rest of the code creates
565 files with open(), and sets the required mode explicitly. Thus, these
566 files were ending up world-writeable. This was not a big issue, because,
567 being within the spool directory, they were not world-accessible. I have
568 created a function called modefopen, which takes an additional mode
569 argument. It sets umask(777), creates the file, chmods it to the required
570 mode, then resets the umask. All the relevant calls to fopen() in the
571 content scanning code have been changed to use this function.
573 PH/43 If retry_interval_max is set greater than 24 hours, it is quietly reset
574 to 24 hours. This avoids potential overflow problems when processing G
575 and H retry rules. I suspect nobody ever tinkers with this value.
577 PH/44 Added STRIP_COMMAND=/usr/bin/strip to the FreeBSD Makefile.
579 PH/45 When the plaintext authenticator is running as a client, the server's
580 challenges are checked to ensure they are valid base64 strings. By
581 default, the authentication attempt is cancelled if an invalid string is
582 received. Setting client_ignore_invalid_base64 true ignores these errors.
583 The decoded challenge strings are now placed in $auth1, $auth2, etc. as
584 they are received. Thus, the responses can be made to depend on the
585 challenges. If an invalid string is ignored, an empty string is placed in
588 PH/46 Messages that are created by the autoreply transport now contains a
589 References: header, in accordance with RFCs 2822 and 3834.
591 PH/47 Added authenticated_sender_force to the smtp transport.
593 PH/48 The ${prvs expansion was broken on systems where time_t was long long.
595 PH/49 Installed latest patch from the Sieve maintainer.
597 PH/50 When an Exim quota was set without a file count quota, and mailbox_size
598 was also set, the appendfile transport was unnecessarily scanning a
599 directory of message files (e.g. for maildir delivery) to find the count
600 of files (along with the size), even though it did not need this
601 information. It now does the scan only if it needs to find either the
602 size of the count of files.
604 PH/51 Added ${time_eval: to convert Exim time strings into seconds.
606 PH/52 Two bugs concerned with error handling when the smtp transport is
609 (i) Exim was not creating retry information for temporary errors given
610 for individual recipients after the DATA command when the smtp transport
611 was used in LMTP mode. This meant that they could be retried too
612 frequently, and not timed out correctly.
614 (ii) Exim was setting the flag that allows error details to be returned
615 for LMTP errors on RCPT commands, but not for LMTP errors for individual
616 recipients that were returned after the DATA command.
618 PH/53 This is related to PH/52, but is more general: for any failing address,
619 when detailed error information was permitted to be returned to the
620 sender, but the error was temporary, then after the final timeout, only
621 "retry timeout exceeded" was returned. Now it returns the full error as
622 well as "retry timeout exceeded".
624 PH/54 Added control=allow_auth_unadvertised, as it seems there are clients that
625 do this, and (what is worse) MTAs that accept it.
627 PH/55 Added the add_header modified to ACLs. The use of "message" with "warn"
628 will now be deprecated.
630 PH/56 New os.c-cygwin from the Cygwin maintainer.
632 JJ/06 exipick: added --unsorted option to allow unsorted output in all output
633 formats (previously only available in exim formats via -bpr, -bpru,
634 and -bpra. Now also available in native and exiqgrep formats)
636 JJ/07 exipick: added --freeze and --thaw options to allow faster interaction
637 with very large, slow to parse queues
639 JJ/08 exipick: added ! as generic prefix to negate any criteria format
641 JJ/09 exipick: miscellaneous performance enhancements (~24% improvements)
643 PH/57 Tidies in SMTP dialogue display in debug output: (i) It was not showing
644 responses to authentication challenges, though it was showing the
645 challenges; (ii) I've removed the CR characters from the debug output for
648 PH/58 Allow for the insertion of a newline as well as a space when a string
649 is turned into more than one encoded-word during RFC 2047 encoding. The
650 Sieve code now uses this.
652 PH/59 Added the following errors that can be detected in retry rules: mail_4xx,
653 data_4xx, lost_connection, tls_required.
655 PH/60 When a VRFY deferred or FAILED, the log message rather than the user
656 message was being sent as an SMTP response.
658 PH/61 Add -l and -k options to exicyclog.
660 PH/62 When verifying, if an address was redirected to one new address, so that
661 verification continued, and the new address failed or deferred after
662 having set something in $address_data, the value of $address_data was not
663 passed back to the ACL. This was different to the case when no
664 redirection occurred. The value is now passed back in both cases.
666 PH/63 Changed the macro HAVE_LOGIN_CAP (see PH/41 for this release above) to
667 HAVE_SETCLASSRESOURCES because there are different APIs in use that all
668 use login_cap.h, so on its own it isn't the distinguishing feature. The
669 new name refers directly to the setclassresources() function.
671 PH/65 Added configuration files for NetBSD3.
673 PH/66 Updated OS/Makefile-HP-UX for gcc 4.1.0 with HP-UX 11.
675 PH/67 Fixed minor infelicity in the sorting of addresses to ensure that IPv6
676 is preferred over IPv4.
678 PH/68 The bounce_return_message and bounce_return_body options were not being
679 honoured for bounces generated during the reception of non-SMTP messages.
680 In particular, this applied to messages rejected by the ACL. This bug has
681 been fixed. However, if bounce_return_message is true and bounce_return_
682 body is false, the headers that are returned for a non-SMTP message
683 include only those that have been read before the error was detected.
684 (In the case of an ACL rejection, they have all been read.)
686 PH/69 The HTML version of the specification is now built in a directory called
687 spec_html instead of spec.html, because the latter looks like a path with
688 a MIME-type, and this confuses some software.
690 PH/70 Catch two compiler warnings in sieve.c.
692 PH/71 Fixed an obscure and subtle bug (thanks Alexander & Matthias). The
693 function verify_get_ident() calls ip_connect() to connect a socket, but
694 if the "connect()" function timed out, ip_connect() used to close the
695 socket. However, verify_get_ident() also closes the socket later, and in
696 between Exim writes to the log, which may get opened at this point. When
697 the socket was closed in ip_connect(), the log could get the same file
698 descriptor number as the socket. This naturally causes chaos. The fix is
699 not to close the socket in ip_connect(); the socket should be closed by
700 the function that creates it. There was only one place in the code where
701 this was missing, in the iplookup router, which I don't think anybody now
702 uses, but I've fixed it anyway.
704 PH/72 Make dns_again_means_nonexist apply to lookups using gethostbyname() as
705 well as to direct DNS lookups. Otherwise the handling of names in host
706 lists is inconsistent and therefore confusing.
712 PH/01 Two changes to the default runtime configuration:
714 (1) Move the checks for relay_from_hosts and authenticated clients from
715 after to before the (commented out) DNS black list checks.
717 (2) Add control=submission to the relay_from_hosts and authenticated
718 clients checks, on the grounds that messages accepted by these
719 statements are most likely to be submissions.
721 PH/02 Several tidies to the handling of ${prvs and ${prvscheck:
723 (1) Generate an error if the third argument for the ${prvs expansion is
726 (2) Treat a missing third argument of ${prvscheck as if it were an empty
729 (3) Reset the variables that are obtained from the first argument of
730 ${prvscheck and used in the second argument before leaving the code,
731 because their memory is reclaimed, so using them afterwards may do
734 (4) Tidy up the code for expanding the arguments of ${prvscheck one by
735 one (it's much easier than Tom thought :-).
737 (5) Because of (4), we can now allow for the use of $prvscheck_result
738 inside the third argument.
740 PH/03 For some reason, the default setting of PATH when running a command from
741 a pipe transport was just "/usr/bin". I have changed it to
744 PH/04 SUPPORT_TRANSLATE_IP_ADDRESS and MOVE_FROZEN_MESSAGES did not cause
745 anything to be listed in the output from -bV.
747 PH/05 When a filter generated an autoreply, the entire To: header line was
748 quoted in the delivery log line, like this:
750 => >A.N.Other <ano@some.domain> <original@ddress> ...
752 This has been changed so that it extracts the operative address. There
753 may be more than one such address. If so, they are comma-separated, like
756 => >ano@some.domain,ona@other.domain <original@ddress> ...
758 PH/06 When a client host used a correct literal IP address in a HELO or EHLO
759 command, (for example, EHLO [1.2.3.4]) and the client's IP address was
760 not being looked up in the rDNS to get a host name, Exim was showing the
761 IP address twice in Received: lines, even though the IP addresses were
762 identical. For example:
764 Received: from [1.2.3.4] (helo=[1.2.3.4])
766 However, if the real host name was known, it was omitting the HELO data
767 if it matched the actual IP address. This has been tidied up so that it
768 doesn't show the same IP address twice.
770 PH/07 When both +timestamp and +memory debugging was on, the value given by
771 $tod_xxx expansions could be wrong, because the tod_stamp() function was
772 called by the debug printing, thereby overwriting the timestamp buffer.
773 Debugging no longer uses the tod_stamp() function when +timestamp is set.
775 PH/08 When the original message was included in an autoreply transport, it
776 always said "this is a copy of the message, including all the headers",
777 even if body_only or headers_only was set. It now gives an appropriate
780 PH/09 Applied a patch from the Sieve maintainer which:
782 o fixes some comments
783 o adds the (disabled) notify extension core
784 o adds some debug output for the result of if/elsif tests
785 o points to the current vacation draft in the documentation
786 and documents the missing references header update
790 o fixes a bug in processing the envelope test (when testing
791 multiple envelope elements, the last element determinted the
794 PH/10 Exim was violating RFC 3834 ("Recommendations for Automatic Responses to
795 Electronic Mail") by including:
797 Auto-submitted: auto-generated
799 in the messages that it generates (bounce messages and others, such as
800 warnings). In the case of bounce messages for non-SMTP mesages, there was
801 also a typo: it was using "Auto_submitted" (underscore instead of
802 hyphen). Since every message generated by Exim is necessarily in response
803 to another message, thes have all been changed to:
805 Auto-Submitted: auto-replied
807 in accordance with these statements in the RFC:
809 The auto-replied keyword:
811 - SHOULD be used on messages sent in direct response to another
812 message by an automatic process,
814 - MUST NOT be used on manually-generated messages,
816 - MAY be used on Delivery Status Notifications (DSNs) and Message
817 Disposition Notifications (MDNs),
819 - MUST NOT be used on messages generated by automatic or periodic
820 processes, except for messages which are automatic responses to
823 PH/11 Added "${if def:sender_address {(envelope-from <$sender_address>)\n\t}}"
824 to the default Received: header definition.
826 PH/12 Added log selector acl_warn_skipped (default on).
828 PH/13 After a successful wildlsearch lookup, discard the values of numeric
829 variables because (a) they are in the wrong storage pool and (b) even if
830 they were copied, it wouldn't work properly because of the caching.
832 PH/14 Add check_rfc2047_length to disable enforcement of RFC 2047 length
833 checking when decoding. Apparently there are clients that generate
834 overlong encoded strings. Why am I not surprised?
836 PH/15 If the first argument of "${if match_address" was not empty, but did not
837 contain an "@" character, Exim crashed. Now it writes a panic log message
838 and treats the condition as false.
840 PH/16 In autoreply, treat an empty string for "once" the same as unset.
842 PH/17 A further patch from the Sieve maintainer: "Introduce the new Sieve
843 extension "envelope-auth". The code is finished and in agreement with
844 other implementations, but there is no documentation so far and in fact,
845 nobody wrote the draft yet. This extension is currently #undef'ed, thus
846 not changing the active code.
848 Print executed "if" and "elsif" statements when debugging is used. This
849 helps a great deal to understand what a filter does.
851 Document more things not specified clearly in RFC3028. I had all this
852 sorted out, when out of a sudden new issues came to my mind. Oops."
854 PH/18 Exim was not recognizing the "net-" search type prefix in match_ip lists
857 PH/19 Exim expands the IPv6 address given to -bh to its full non-abbreviated
858 canonical form (as documented). However, after a host name lookup from
859 the IP address, check_host() was doing a simple string comparison with
860 addresses acquired from the DNS when checking that the found name did
861 have the original IP as one of its addresses. Since any found IPv6
862 addresses are likely to be in abbreviated form, the comparison could
863 fail. Luckily, there already exists a function for doing the comparison
864 by converting both addresses to binary, so now that is used instead of
867 PH/20 There was another similar case to PH/19, when a complete host name was
868 given in a host list; looking up its IP address could give an abbreviated
869 form, whereas the current host's name might or might not be abbreviated.
870 The same fix has been applied.
876 PH/01 The ${base62: operator adjusted itself to base 36 when BASE_62 was
877 set to 36 (for Darwin and Cygwin), but the ${base62d: operator did not.
880 PH/02 Two minor problems detected in Cygwin: the os.{c,h} files had lost */ on
881 the CVS lines, and there was a missing #if HAVE_IPV6 in host.c.
883 PH/03 Typo: missing ".o" in src/pcre/Makefile.
885 PH/04 Tighten up "personal" tests: Instead of testing for any "List-"
886 header line, restrict the check to what is listed in RFCs 2369 and 2929.
887 Also, for "Auto-Submitted", treat anything other than "no" as
888 non-personal, in accordance with RFC 3834. (Previously it treated
889 anything starting "auto-" as non-personal.)
891 TF/01 The control=submission/name=... option had a problem with syntax
892 errors if the name included a slash character. The /name= option
893 now slurps the rest of the string, so it can include any characters
894 but it must come last in the list of options (after /sender_retain
897 PH/05 Some modifications to the interface to the fake nameserver for the new
905 TK/01 Added the "success_on_redirect" address verification option. See
906 NewStuff for rationale and an example.
908 PH/01 Added support for SQLite, basic code supplied by David Woodhouse.
910 PH/02 Patch to exigrep to allow it to work on syslog lines.
912 PH/03 When creating an mbox file for a virus/spam scan, use fseek() instead of
913 fread() to skip over the body file's header line, because in Cygwin the
914 header line is locked and is inaccessible.
916 PH/04 Added $message_exim_id, ultimately to replace $message_id (they will both
917 co-exist for some time) to make it clear that it is the Exim ID that is
918 referenced, not the Message-ID: header line.
920 PH/05 Replaced all Tom's calls to snprintf() with calls to the internal
921 string_format() function, because snprintf() does not exist on all
924 PH/06 The use of forbid_filter_existstest now also locks out the use of the
925 ${stat: expansion item.
927 PH/07 Changed "SMTP protocol violation: synchronization error" into "SMTP
928 protocol synchronization error", to keep the pedants happy.
930 PH/08 Arrange for USE_INET_NTOA_FIX to be set in config.h for AIX systems as
931 well as for IRIX systems, when gcc is being used. See the host.c source
934 PH/09 Installed latest Cygwin configuration files from the Cygwin maintainer.
936 PH/10 Named domain lists were not working if used in a queue_smtp_domains
939 PH/11 Added support for the IGNOREQUOTA extension to LMTP, both to the lmtp
940 transport and to the smtp transport in LMTP mode.
942 TK/02 Remove one case of BASE64 error detection FTTB (undocumented anyway).
944 PH/12 There was a missing call to search_tidyup() before the fork() in rda.c to
945 run a filter in a subprocess. This could lead to confusion in subsequent
946 lookups in the parent process. There should also be a search_tidyup() at
947 the end of the subprocess.
949 PH/13 Previously, if "verify = helo" was set in an ACL, the condition was true
950 only if the host matched helo_try_verify_hosts, which caused the
951 verification to occur when the EHLO/HELO command was issued. The ACL just
952 tested the remembered result. Now, if a previous verification attempt has
953 not happened, "verify = helo" does it there and then.
955 JJ/01 exipick: added $message_exim_id variable (see 4.53-PH/04)
957 TK/03 Fix log output including CR from clamd.
959 PH/14 A reference to $reply_address when Reply-to: was empty and From: did not
960 exist provoked a memory error which could cause a segfault.
962 PH/15 Installed PCRE 6.2
964 PH/17 Defined BIND_8_COMPAT in the Darwin os.h file.
966 PH/18 Reversed 4.52/PH/17 because the HP-UX user found it wasn't the cause
967 of the problem. Specifically, suggested +O2 rather than +O1 for the
970 PH/19 Added sqlite_lock_timeout option (David Woodhouse's patch).
972 PH/20 If a delivery was routed to a non-standard port by means of an SRV
973 record, the port was not correctly logged when the outgoing_port log
974 selector was set (it logged the transort's default port).
976 PH/21 Added support for host-specific ports to manualroute, queryprogram,
977 fallback_hosts, and "hosts" in the smtp transport.
979 PH/22 If the log selector "outgoing_port" is set, the port is now also given on
980 host errors such as "Connection refused".
982 PH/23 Applied a patch to fix problems with exim-4.52 while doing radius
983 authentication with radiusclient 0.4.9:
985 - Error returned from rc_read_config was caught wrongly
986 - Username/password not passed on to radius server due to wrong length.
988 The presumption is that some radiusclient API changes for 4.51/PH/17
989 were not taken care of correctly. The code is still untested by me (my
990 Linux distribution still has 0.3.2 of radiusclient), but it was
991 contributed by a Radius user.
993 PH/24 When doing a callout, the value of $domain wasn't set correctly when
994 expanding the "port" option of the smtp transport.
996 TK/04 MIME ACL: Fix buffer underrun that occurs when EOF condition is met
997 while reading a MIME header. Thanks to Tom Hughes for a patch.
999 PH/24 Include config.h inside local_scan.h so that configuration settings are
1002 PH/25 Make $smtp_command_argument available after all SMTP commands. This means
1003 that in an ACL for RCPT (for example), you can examine exactly what was
1006 PH/26 Exim was recognizing IPv6 addresses of the form [IPv6:....] in EHLO
1007 commands, but it was not correctly comparing the address with the actual
1008 client host address. Thus, it would show the EHLO address in Received:
1009 header lines when this was not necessary.
1011 PH/27 Added the % operator to ${eval:}.
1013 PH/28 Exim tries to create and chdir to its spool directory when it starts;
1014 it should be ignoring failures (because with -C, for example, it has lost
1015 privilege). It wasn't ignoring creation failures other than "already
1018 PH/29 Added "crypteq" to the list of supported features that Exim outputs when
1021 PH/30 Fixed (presumably very longstanding) bug in exim_dbmbuild: if it failed
1022 because an input line was too long, either on its own, or by virtue of
1023 too many continuations, the temporary file was not being removed, and the
1024 return code was incorrect.
1026 PH/31 Missing "BOOL" in function definition in filtertest.c.
1028 PH/32 Applied Sieve patches from the maintainer.
1030 TK/05 Domainkeys: Accomodate for a minor API change in libdomainkeys 0.67.
1032 PH/33 Added "verify = not_blind".
1034 PH/34 There are settings for CHOWN_COMMAND and MV_COMMAND that can be used in
1035 Local/Makefile (with some defaults set). These are used in built scripts
1036 such as exicyclog, but they have never been used in the exim_install
1037 script (though there are many overriding facilities there). I have
1038 arranged that the exim_install script now takes note of these two
1041 PH/35 Installed configuration files for Dragonfly.
1043 PH/36 When a locally submitted message by a trusted user did not contain a
1044 From: header, and the sender address was obtained from -f or from an SMTP
1045 MAIL command, and the trusted user did not use -F to supply a sender
1046 name, $originator_name was incorrectly used when constructing a From:
1047 header. Furthermore, $originator_name was used for submission mode
1048 messages from external hosts without From: headers in a similar way,
1049 which is clearly wrong.
1051 PH/37 Added control=suppress_local_fixups.
1053 PH/38 When log_selector = +received_sender was set, and the addition of the
1054 sender made the log line's construction buffer exactly full, or one byte
1055 less than full, an overflow happened when the terminating "\n" was
1058 PH/39 Added a new log selector, "unknown_in_list", which provokes a log entry
1059 when the result of a list match is failure because a DNS lookup failed.
1061 PH/40 RM_COMMAND is now used in the building process.
1063 PH/41 Added a "distclean" target to the top-level Makefile; it deletes all
1064 the "build-* directories that it finds.
1066 PH/42 (But a TF fix): In a domain list, Exim incorrectly matched @[] if the IP
1067 address in a domain literal was a prefix of an interface address.
1069 PH/43 (Again a TF fix): In the dnslookup router, do not apply widen_domains
1070 when verifying a sender address, unless rewrite_headers is false.
1072 PH/44 Wrote a long comment about why errors_to addresses are verified as
1073 recipients, not senders.
1075 TF/01 Add missing LIBS=-lm to OS/Makefile-OpenBSD which was overlooked when
1076 the ratelimit ACL was added.
1078 PH/45 Added $smtp_command for the full command (cf $smtp_command_argument).
1080 PH/46 Added extra information about PostgreSQL errors to the error string.
1082 PH/47 Added an interface to a fake DNS resolver for use by the new test suite,
1083 avoiding the need to install special zones in a real server. This is
1084 backwards compatible; if it can't find the fake resolver, it drops back.
1085 Thus, both old and new test suites can be run.
1087 TF/02 Added util/ratelimit.pl
1089 TF/03 Minor fix to the ratelimit code to improve its behaviour in case the
1090 clock is set back in time.
1092 TF/04 Fix the ratelimit support in exim_fixdb. Patch provided by Brian
1093 Candler <B.Candler@pobox.com>.
1095 TF/05 The fix for PH/43 was not completely correct; widen_domains is always
1096 OK for addresses that are the result of redirections.
1098 PH/48 A number of further additions for the benefit of the new test suite,
1099 including a fake gethostbyname() that interfaces to the fake DNS resolver
1102 TF/06 The fix for widen_domains has also been applied to qualify_single and
1103 search_parents which are the other dnslookup options that can cause
1106 PH/49 Michael Haardt's randomized retrying, but as a separate retry parameter
1109 PH/50 Make never_users, trusted_users, admin_groups, trusted_groups expandable.
1111 TF/07 Exim produced the error message "an SRV record indicated no SMTP
1112 service" if it encountered an MX record with an empty target hostname.
1113 The message is now "an MX or SRV record indicated no SMTP service".
1115 TF/08 Change PH/13 introduced the possibility that verify=helo may defer,
1116 if the DNS of the sending site is misconfigured. This is quite a
1117 common situation. This change restores the behaviour of treating a
1118 helo verification defer as a failure.
1120 PH/51 If self=fail was set on a router, the bounce message did not include the
1121 actual error message.
1127 TF/01 Added support for Client SMTP Authorization. See NewStuff for details.
1129 PH/01 When a transport filter timed out in a pipe delivery, and the pipe
1130 command itself ended in error, the underlying message about the transport
1131 filter timeout was being overwritten with the pipe command error. Now the
1132 underlying error message should be appended to the second error message.
1134 TK/01 Fix poll() being unavailable on Mac OSX 10.2.
1136 PH/02 Reduce the amount of output that "make" produces by default. Full output
1137 can still be requested.
1139 PH/03 The warning log line about a condition test deferring for a "warn" verb
1140 was being output only once per connection, rather than after each
1141 occurrence (because it was using the same function as for successful
1142 "warn" verbs). This seems wrong, so I have changed it.
1144 TF/02 Two buglets in acl.c which caused Exim to read a few bytes of memory that
1145 it should not have, which might have caused a crash in the right
1146 circumstances, but probably never did.
1148 PH/04 Installed a modified version of Tony Finch's patch to make submission
1149 mode fix the return path as well as the Sender: header line, and to
1150 add a /name= option so that you can make the user's friendly name appear
1153 TF/03 Added the control = fakedefer ACL modifier.
1155 TF/04 Added the ratelimit ACL condition. See NewStuff for details. Thanks to
1156 Mark Lowes for thorough testing.
1158 TK/02 Rewrote SPF support to work with libspf2 versions >1.2.0.
1160 TK/03 Merged latest SRS patch from Miles Wilton.
1162 PH/05 There's a shambles in IRIX6 - it defines EX_OK in unistd.h which conflicts
1163 with the definition in sysexits.h (which is #included earlier).
1164 Fortunately, Exim does not actually use EX_OK. The code used to try to
1165 preserve the sysexits.h value, by assumimg that macro definitions were
1166 scanned for macro replacements. I have been disabused of this notion,
1167 so now the code just undefines EX_OK before #including unistd.h.
1169 PH/06 There is a timeout for writing blocks of data, set by, e.g. data_timeout
1170 in the smtp transport. When a block could not be written in a single
1171 write() function, the timeout was being re-applied to each part-write.
1172 This seems wrong - if the receiver was accepting one byte at a time it
1173 would take for ever. The timeout is now adjusted when this happens. It
1174 doesn't have to be particularly precise.
1176 TK/04 Added simple SPF lookup method in EXPERIMENTAL_SPF. See NewStuff for
1177 details. Thanks to Chris Webb <chris@arachsys.com> for the patch!
1179 PH/07 Added "fullpostmaster" verify option, which does a check to <postmaster>
1180 without a domain if the check to <postmaster@domain> fails.
1182 SC/01 Eximstats: added -xls and the ability to specify output files
1183 (patch written by Frank Heydlauf).
1185 SC/02 Eximstats: use FileHandles for outputing results.
1187 SC/03 Eximstats: allow any combination of xls, txt, and html output.
1189 SC/04 Eximstats: fixed display of large numbers with -nvr option
1191 SC/05 Eximstats: fixed merging of reports with empty tables.
1193 SC/06 Eximstats: added the -include_original_destination flag
1195 SC/07 Eximstats: removed tabs and trailing whitespace.
1197 TK/05 Malware: Improve on aveserver error handling. Patch from Alex Miller.
1199 TK/06 MBOX spool code: Add real "From " MBOX separator line
1200 so the .eml file is really in mbox format (even though
1201 most programs do not really care). Patch from Alex Miller.
1203 TK/07 MBOX spool code: Add X-Envelope-From: and X-Envelope-To: headers.
1204 The latter is generated from $received_to and is only set if the
1205 message has one envelope recipient. SA can use these headers,
1206 obviously out-of-the-box. Patch from Alex Miller.
1208 PH/08 The ${def test on a variable was returning false if the variable's
1209 value was "0", contrary to what the specification has always said!
1210 The result should be true unless the variable is empty.
1212 PH/09 The syntax error of a character other than { following "${if
1213 def:variable_name" (after optional whitespace) was not being diagnosed.
1214 An expansion such as ${if def:sender_ident:{xxx}{yyy}} in which an
1215 accidental colon was present, for example, could give incorrect results.
1217 PH/10 Tidied the code in a number of places where the st_size field of a stat()
1218 result is used (not including appendfile, where other changes are about
1221 PH/11 Upgraded appendfile so that quotas larger than 2G are now supported.
1222 This involved changing a lot of size variables from int to off_t. It
1223 should work with maildirs and everything.
1225 TK/08 Apply fix provided by Michael Haardt to prevent deadlock in case of
1226 spamd dying while we are connected to it.
1228 TF/05 Fixed a ${extract error message typo reported by Jeremy Harris
1231 PH/12 Applied Alex Kiernan's patch for the API change for the error callback
1232 function for BDB 4.3.
1234 PH/13 Changed auto_thaw such that it does not apply to bounce messages.
1236 PH/14 Imported PCRE 6.0; this was more than just a trivial operation because
1237 the sources for PCRE have been re-arranged and more files are now
1240 PH/15 The code I had for printing potentially long long variables in PH/11
1241 above was not the best (it lost precision). The length of off_t variables
1242 is now inspected at build time, and an appropriate printing format (%ld
1243 or %lld) is chosen and #defined by OFF_T_FMT. We also define LONGLONG_T
1244 to be "long long int" or "long int". This is needed for the internal
1245 formatting function string_vformat().
1247 PH/16 Applied Matthew Newton's patch to exicyclog: "If log_file_path is set in
1248 the configuration file to be ":syslog", then the script "guesses" where
1249 the logs files are, rather than using the compiled in default. In our
1250 case the guess is not the same as the compiled default, so the script
1251 suddenly stopped working when I started to use syslog. The patch checks
1252 to see if log_file_path is "". If so, it attempts to read it from exim
1253 with no configuration file to get the compiled in version, before it
1254 falls back to the previous guessing code."
1256 TK/09 Added "prvs" and "prvscheck" expansion items. These help a lot with
1257 implementing BATV in an Exim configuration. See NewStuff for the gory
1260 PH/17 Applied Michael Haardt's patch for HP-UX, affecting only the os.h and
1261 Makefile that are specific to HP-UX.
1263 PH/18 If the "use_postmaster" option was set for a recipient callout together
1264 with the "random" option, the postmaster address was used as the MAIL
1265 FROM address for the random test, but not for the subsequent recipient
1266 test. It is now used for both.
1268 PH/19 Applied Michael Haardt's patch to update Sieve to RFC3028bis. "The
1269 patch removes a few documentation additions to RFC 3028, because the
1270 latest draft now contains them. It adds the new en;ascii-case comparator
1271 and a new error check for 8bit text in MIME parts. Comparator and
1272 require names are now matched exactly. I enabled the subaddress
1273 extension, but it is not well tested yet (read: it works for me)."
1275 PH/20 Added macros for time_t as for off_t (see PH/15 above) and used them to
1276 rework some of the code of TK/09 above to avoid the hardwired use of
1277 "%lld" and "long long". Replaced the call to snprintf() with a call to
1280 PH/21 Added some other messages to those in 4.51/PH/42, namely "All relevant MX
1281 records point to non-existent hosts", "retry timeout exceeded", and
1282 "retry time not reached for any host after a long failure period".
1284 PH/22 Fixed some oversights/typos causing bugs when Exim is compiled with
1285 experimental DomainKeys support:
1287 (1) The filter variables $n0-$n9 and $sn0-$sn9 were broken.
1288 (2) On an error such as an illegally used "control", the wrong name for
1289 the control was given.
1291 These problems did NOT occur unless DomainKeys support was compiled.
1293 PH/23 Added daemon_startup_retries and daemon_startup_sleep.
1295 PH/24 Added ${if match_ip condition.
1297 PH/25 Put debug statements on either side of calls to EXIM_DBOPEN() for hints
1298 databases so that it will be absolutely obvious if a crash occurs in the
1299 DB library. This is a regular occurrence (often caused by mis-matched
1302 PH/26 Insert a lot of missing (void) casts for functions such as chown(),
1303 chmod(), fcntl(), sscanf(), and other functions from stdio.h. These were
1304 picked up on a user's system that detects such things. There doesn't seem
1305 to be a gcc warning option for this - only an attribute that has to be
1306 put on the function's prototype. It seems that in Fedora Core 4 they have
1307 set this on a number of new functions. No doubt there will be more in due
1310 PH/27 If a dnslookup or manualroute router is set with verify=only, it need not
1311 specify a transport. However, if an address that was verified by such a
1312 router was the subject of a callout, Exim crashed because it tried to
1313 read the rcpt_include_affixes from the non-existent transport. Now it
1314 just assumes that the setting of that option is false. This bug was
1315 introduced by 4.51/PH/31.
1317 PH/28 Changed -d+all to exclude +memory, because that information is very
1318 rarely of interest, but it makes the output a lot bigger. People tend to
1319 do -d+all out of habit.
1321 PH/29 Removed support for the Linux-libc5 build, as it is obsolete and the
1322 code in os-type was giving problems when libc.so lives in lib64, like on
1325 PH/30 Exim's DNS code uses the original T_xxx names for DNS record times. These
1326 aren't the modern standard, and it seems that some systems' include files
1327 don't always have them. Exim was already checking for some of the newer
1328 ones like T_AAAA, and defining it itself. I've added checks for all the
1329 record types that Exim uses.
1331 PH/31 When using GnuTLS, if the parameters cache file did not exist, Exim was
1332 not automatically generating a new one, as it is supposed to. This
1333 prevented TLS from working. If the file did exist, but contained invalid
1334 data, a new version was generated, as expected. It was only the case of a
1335 non-existent file that was broken.
1337 TK/10 Domainkeys: Fix a bug in verification that caused a crash in conjunction
1338 with a change in libdomainkeys > 0.64.
1340 TK/11 Domainkeys: Change the logic how the "testing" policy flag is retrieved
1341 from DNS. If the selector record carries the flag, it now has
1342 precedence over the domain-wide flag.
1344 TK/12 Cleared some compiler warnings related to SPF, SRS and DK code.
1346 PH/32 In mua_wrapper mode, if an smtp transport configuration error (such as
1347 the use of a port name that isn't defined in /etc/services) occurred, the
1348 message was deferred as in a normal delivery, and thus remained on the
1349 spool, instead of being failed because of the mua_wrapper setting. This
1350 is now fixed, and I tidied up some of the mua_wrapper messages at the
1353 SC/08 Eximstats: whilst parsing the mainlog(s), store information about
1354 the messages in a hash of arrays rather than using individual hashes.
1355 This is a bit cleaner and results in dramatic memory savings, albeit
1356 at a slight CPU cost.
1358 SC/09 Eximstats: added the -show_rt<list> and the -show_dt<list> flags
1359 as requested by Marc Sherman.
1361 SC/10 Eximstats: added histograms for user specified patterns as requested
1364 SC/11 Eximstats: v1.43 - bugfix for pattern histograms with -h0 specified.
1366 PH/33 Patch from the Cygwin maintainer to add "b" to all occurences of
1367 fopen() in the content-scanning modules that did not already have it.
1373 TK/01 Added Yahoo DomainKeys support via libdomainkeys. See
1374 doc/experimental-spec.txt for details. (http://domainkeys.sf.net)
1376 TK/02 Fix ACL "control" statement not being available in MIME ACL.
1378 TK/03 Fix ACL "regex" condition not being available in MIME ACL.
1380 PH/01 Installed a patch from the Sieve maintainer that allows -bf to be used
1381 to test Sieve filters that use "vacation".
1383 PH/02 Installed a slightly modified version of Nikos Mavrogiannopoulos' patch
1384 that changes the way the GnuTLS parameters are stored in the cache file.
1385 The new format can be generated externally. For backward compatibility,
1386 if the data in the cache doesn't make sense, Exim assumes it has read an
1387 old-format file, and it generates new data and writes a new file. This
1388 means that you can't go back to an older release without removing the
1391 PH/03 A redirect router that has both "unseen" and "one_time" set does not
1392 work if there are any delivery delays because "one_time" forces the
1393 parent to be marked "delivered", so its unseen clone is never tried
1394 again. For this reason, Exim now forbids the simultaneous setting of
1397 PH/04 Change 4.11/85 fixed an obscure bug concerned with addresses that are
1398 redirected to themselves ("homonym" addresses). Read the long ChangeLog
1399 entry if you want to know the details. The fix, however, neglected to
1400 consider the case when local delivery batching is involved. The test for
1401 "previously delivered" was not happening when checking to see if an
1402 address could be batched with a previous (undelivered) one; under
1403 certain circumstances this could lead to multiple deliveries to the same
1406 PH/05 Renamed the macro SOCKLEN_T as EXIM_SOCKLEN_T because AIX uses SOCKLEN_T
1407 in its include files, and this causes problems building Exim.
1409 PH/06 A number of "verify =" ACL conditions have no options (e.g. verify =
1410 header_syntax) but Exim was just ignoring anything given after a slash.
1411 In particular, this caused confusion with an attempt to use "verify =
1412 reverse_host_lookup/defer_ok". An error is now given when options are
1413 supplied for verify items that do not have them. (Maybe reverse_host_
1414 lookup should have a defer_ok option, but that's a different point.)
1416 PH/07 Increase the size of the buffer for incoming SMTP commands from 512 (as
1417 defined by RFC 821) to 2048, because there were problems with some AUTH
1418 commands, and RFC 1869 says the size should be increased for extended
1419 SMTP commands that take arguments.
1421 PH/08 Added ${dlfunc dynamically loaded function for expansion (code from Tony
1424 PH/09 Previously, an attempt to use ${perl when it wasn't compiled gave an
1425 "unknown" error; now it says that the functionality isn't in the binary.
1427 PH/10 Added a nasty fudge to try to recognize and flatten LDAP passwords in
1428 an address' error message when a string expansion fails (syntax or
1429 whatever). Otherwise the password may appear in the log. Following change
1430 PH/42 below, there is no longer a chance of it appearing in a bounce
1433 PH/11 Installed exipick version 20050225.0 from John Jetmore.
1435 PH/12 If the last host in a fallback_hosts list was multihomed, only the first
1436 of its addresses was ever tried. (Bugzilla bug #2.)
1438 PH/13 If "headers_add" in a transport didn't end in a newline, Exim printed
1439 the result incorrectly in the debug output. (It correctly added a newline
1440 to what was transported.)
1442 TF/01 Added $received_time.
1444 PH/14 Modified the default configuration to add an acl_smtp_data ACL, with
1445 commented out examples of how to interface to a virus scanner and to
1446 SpamAssassin. Also added commented examples of av_scanner and
1447 spamd_address settings.
1449 PH/15 Further to TK/02 and TK/03 above, tidied up the tables of what conditions
1450 and controls are allowed in which ACLs. There were a couple of minor
1451 errors. Some of the entries in the conditions table (which is a table of
1452 where they are NOT allowed) were getting very unwieldy; rewrote them as a
1453 negation of where the condition IS allowed.
1455 PH/16 Installed updated OS/os.c-cygwin from the Cygwin maintainer.
1457 PH/17 The API for radiusclient changed at release 0.4.0. Unfortunately, the
1458 header file does not have a version number, so I've had to invent a new
1459 value for RADIUS_LIB_TYPE, namely "RADIUSCLIENTNEW" to request the new
1460 API. The code is untested by me (my Linux distribution still has 0.3.2 of
1461 radiusclient), but it was contributed by a Radius user.
1463 PH/18 Installed Lars Mainka's patch for the support of CRL collections in
1464 files or directories, for OpenSSL.
1466 PH/19 When an Exim process that is running as root has to create an Exim log
1467 file, it does so in a subprocess that runs as exim:exim so as to get the
1468 ownership right at creation (otherwise, other Exim processes might see
1469 the file with the wrong ownership). There was no test for failure of this
1470 fork() call, which would lead to the process getting stuck as it waited
1471 for a non-existent subprocess. Forks do occasionally fail when resources
1472 run out. I reviewed all the other calls to fork(); they all seem to check
1475 PH/20 When checking for unexpected SMTP input at connect time (before writing
1476 the banner), Exim was not dealing correctly with a non-positive return
1477 from the read() function. If the client had disconnected by this time,
1478 the result was a log entry for a synchronization error with an empty
1479 string after "input=" when read() returned zero. If read() returned -1
1480 (an event I could not check), uninitialized data bytes were printed.
1481 There were reports of junk text (parts of files, etc) appearing after
1484 PH/21 Added acl_not_smtp_mime to allow for MIME scanning for non-SMTP messages.
1486 PH/22 Added support for macro redefinition, and (re)definition in between
1487 driver and ACL definitions.
1489 PH/23 The cyrus_sasl authenticator was expanding server_hostname, but then
1490 forgetting to use the resulting value; it was using the unexpanded value.
1492 PH/24 The cyrus_sasl authenticator was advertising mechanisms for which it
1493 hadn't been configured. The fix is from Juergen Kreileder, who
1494 understands it better than I do:
1496 "Here's what I see happening with three configured cyrus_sasl
1497 authenticators configured (plain, login, cram-md5):
1499 On startup auth_cyrus_sasl_init() gets called for each of these.
1500 This means three calls to sasl_listmech() without a specified mech_list.
1501 => SASL tests which mechs of all available mechs actually work
1502 => three warnings about OTP not working
1503 => the returned list contains: plain, login, cram-md5, digest-md5, ...
1505 With the patch, sasl_listmech() also gets called three times. But now
1506 SASL's mech_list option is set to the server_mech specified in the the
1507 authenticator. Or in other words, the answer from sasl_listmech()
1508 gets limited to just the mech you're testing for (which is different
1510 => the return list contains just 'plain' or 'login', 'cram-md5' or
1511 nothing depending on the value of ob->server_mech.
1513 I've just tested the patch: Authentication still works fine,
1514 unavailable mechs specified in the exim configuration are still
1515 caught, and the auth.log warnings about OTP are gone."
1517 PH/25 When debugging is enabled, the contents of the command line are added
1518 to the debugging output, even when log_selector=+arguments is not
1521 PH/26 Change scripts/os-type so that when "uname -s" returns just "GNU", the
1522 answer is "GNU", and only if the return is "GNU/something" is the answer
1525 PH/27 $acl_verify_message is now set immediately after the failure of a
1526 verification in an ACL, and so is available in subsequent modifiers. In
1527 particular, the message can be preserved by coding like this:
1529 warn !verify = sender
1530 set acl_m0 = $acl_verify_message
1532 Previously, $acl_verify_message was set only while expanding "message"
1533 and "log_message" when a very denied access.
1535 PH/28 Modified OS/os.c-Linux with
1537 -#ifndef OS_LOAD_AVERAGE
1538 +#if !defined(OS_LOAD_AVERAGE) && defined(__linux__)
1540 to make Exim compile on kfreebsd-gnu. (I'm totally confused about the
1541 nomenclature these days.)
1543 PH/29 Installed patch from the Sieve maintainer that adds the options
1544 sieve_useraddress and sieve_subaddress to the redirect router.
1546 PH/30 In these circumstances:
1547 . Two addresses routed to the same list of hosts;
1548 . First host does not offer TLS;
1549 . First host accepts first address;
1550 . First host gives temporary error to second address;
1551 . Second host offers TLS and a TLS session is established;
1552 . Second host accepts second address.
1553 Exim incorrectly logged both deliveries with the TLS parameters (cipher
1554 and peerdn, if requested) that were in fact used only for the second
1557 PH/31 When doing a callout as part of verifying an address, Exim was not paying
1558 attention to any local part prefix or suffix that was matched by the
1559 router that accepted the address. It now behaves in the same way as it
1560 does for delivery: the affixes are removed from the local part unless
1561 rcpt_include_affixes is set on the transport.
1563 PH/32 Add the sender address, as F=<...>, to the log line when logging a
1564 timeout during the DATA phase of an incoming message.
1566 PH/33 Sieve envelope tests were broken for match types other than :is. I have
1567 applied a patch sanctioned by the Sieve maintainer.
1569 PH/34 Change 4.50/80 broke Exim in that it could no longer handle cases where
1570 the uid or gid is negative. A case of a negative gid caused this to be
1571 noticed. The fix allows for either to be negative.
1573 PH/35 ACL_WHERE_MIME is now declared unconditionally, to avoid too much code
1574 clutter, but the tables that are indexed by ACL_WHERE_xxx values had been
1577 PH/36 The change PH/12 above was broken. Fixed it.
1579 PH/37 Exim used to check for duplicate addresses in the middle of routing, on
1580 the grounds that routing the same address twice would always produce the
1581 same answer. This might have been true once, but it is certainly no
1582 longer true now. Routing a child address may depend on the previous
1583 routing that produced that child. Some complicated redirection strategies
1584 went wrong when messages had multiple recipients, and made Exim's
1585 behaviour dependent on the order in which the addresses were given.
1587 I have moved the duplicate checking until after the routing is complete.
1588 Exim scans the addresses that are assigned to local and remote
1589 transports, and removes any duplicates. This means that more work will be
1590 done, as duplicates will always all be routed, but duplicates are
1591 presumably rare, so I don't expect this is of any significance.
1593 For deliveries to pipes, files, and autoreplies, the duplicate checking
1594 still happens during the routing process, since they are not going to be
1597 PH/38 Installed a patch from Ian Freislich, with the agreement of Tom Kistner.
1598 It corrects a timeout issue with spamd. This is Ian's comment: "The
1599 background is that sometimes spamd either never reads data from a
1600 connection it has accepted, or it never writes response data. The exiscan
1601 spam.[ch] uses a 3600 second timeout on spamd socket reads, further, it
1602 blindly assumes that writes won't block so it may never time out."
1604 PH/39 Allow G after quota size as well as K and M.
1606 PH/40 The value set for $authenticated_id in an authenticator may not contain
1607 binary zeroes or newlines because the value is written to log lines and
1608 to spool files. There was no check on this. Now the value is run through
1609 the string_printing() function so that such characters are converted to
1610 printable escape sequences.
1612 PH/41 $message_linecount is a new variable that contains the total number of
1613 lines in the message. Compare $body_linecount, which is the count for the
1616 PH/42 Exim no longer gives details of delivery errors for specific addresses in
1617 bounce and delay warning messages, except in certain special cases, which
1620 (a) An SMTP error message from a remote host;
1621 (b) A message specified in a :fail: redirection;
1622 (c) A message specified in a "fail" command in a system filter;
1623 (d) A message specified in a FAIL return from the queryprogram router;
1624 (e) A message specified by the cannot_route_message router option.
1626 In these cases only, Exim does include the error details in bounce and
1627 warning messages. There are also a few cases where bland messages such
1628 as "unrouteable address" or "local delivery error" are given.
1630 PH/43 $value is now also set for the "else" part of a ${run expansion.
1632 PH/44 Applied patch from the Sieve maintainer: "The vacation draft is still
1633 being worked on, but at least Exim now implements the latest version to
1636 PH/45 In a pipe transport, although a timeout while waiting for the pipe
1637 process to complete was treated as a delivery failure, a timeout while
1638 writing the message to the pipe was logged, but erroneously treated as a
1639 successful delivery. Such timeouts include transport filter timeouts. For
1640 consistency with the overall process timeout, these timeouts are now
1641 treated as errors, giving rise to delivery failures by default. However,
1642 there is now a new Boolean option for the pipe transport called
1643 timeout_defer, which, if set TRUE, converts the failures into defers for
1644 both kinds of timeout. A transport filter timeout is now identified in
1647 PH/46 The "scripts/Configure-config.h" script calls "make" at one point. On
1648 systems where "make" and "gmake" are different, calling "gmake" at top
1649 level broke things. I've arranged for the value of $(MAKE) to be passed
1650 from the Makefile to this script so that it can call the same version of
1654 A note about Exim versions 4.44 and 4.50
1655 ----------------------------------------
1657 Exim 4.50 was meant to be the next release after 4.43. It contains a lot of
1658 changes of various kinds. As a consequence, a big documentation update was
1659 needed. This delayed the release for rather longer than seemed good, especially
1660 in the light of a couple of (minor) security issues. Therefore, the changes
1661 that fixed bugs were backported into 4.43, to create a 4.44 maintenance
1662 release. So 4.44 and 4.50 are in effect two different branches that both start
1665 I have left the 4.50 change log unchanged; it contains all the changes since
1666 4.43. The change log for 4.44 is below; many of its items are identical to
1667 those for 4.50. This seems to be the most sensible way to preserve the
1668 historical information.
1674 1. Minor wording change to the doc/README.SIEVE file.
1676 2. Change 4.43/35 introduced a bug: if quota_filecount was set, the
1677 computation of the current number of files was incorrect.
1679 3. Closing a stable door: arrange to panic-die if setitimer() ever fails. The
1680 bug fixed in 4.43/37 would have been diagnosed quickly if this had been in
1683 4. Give more explanation in the error message when the command for a transport
1684 filter fails to execute.
1686 5. There are several places where Exim runs a non-Exim command in a
1687 subprocess. The SIGUSR1 signal should be disabled for these processes. This
1688 was being done only for the command run by the queryprogram router. It is
1689 now done for all such subprocesses. The other cases are: ${run, transport
1690 filters, and the commands run by the lmtp and pipe transports.
1692 6. Added CONFIGURE_GROUP build-time option.
1694 7. Some older OS have a limit of 256 on the maximum number of file
1695 descriptors. Exim was using setrlimit() to set 1000 as a large value
1696 unlikely to be exceeded. Change 4.43/17 caused a lot of logging on these
1697 systems. I've change it so that if it can't get 1000, it tries for 256.
1699 8. "control=submission" was allowed, but had no effect, in a DATA ACL. This
1700 was an oversight, and furthermore, ever since the addition of extra
1701 controls (e.g. 4.43/32), the checks on when to allow different forms of
1702 "control" were broken. There should now be diagnostics for all cases when a
1703 control that does not make sense is encountered.
1705 9. Added the /retain_sender option to "control=submission".
1707 10. $recipients is now available in the predata ACL (oversight).
1709 11. Tidy the search cache before the fork to do a delivery from a message
1710 received from the command line. Otherwise the child will trigger a lookup
1711 failure and thereby defer the delivery if it tries to use (for example) a
1712 cached ldap connection that the parent has called unbind on.
1714 12. If verify=recipient was followed by verify=sender in a RCPT ACL, the value
1715 of $address_data from the recipient verification was clobbered by the
1716 sender verification.
1718 13. The value of address_data from a sender verification is now available in
1719 $sender_address_data in subsequent conditions in the ACL statement.
1721 14. Added forbid_sieve_filter and forbid_exim_filter to the redirect router.
1723 15. Added a new option "connect=<time>" to callout options, to set a different
1726 16. If FIXED_NEVER_USERS was defined, but empty, Exim was assuming the uid 0
1727 was its contents. (It was OK if the option was not defined at all.)
1729 17. A "Completed" log line is now written for messages that are removed from
1730 the spool by the -Mrm option.
1732 18. New variables $sender_verify_failure and $recipient_verify_failure contain
1733 information about exactly what failed.
1735 19. Added -dd to debug only the daemon process.
1737 20. Incorporated Michael Haardt's patch to ldap.c for improving the way it
1738 handles timeouts, both on the server side and network timeouts. Renamed the
1739 CONNECT parameter as NETTIMEOUT (but kept the old name for compatibility).
1741 21. The rare case of EHLO->STARTTLS->HELO was setting the protocol to "smtp".
1742 It is now set to "smtps".
1744 22. $host_address is now set to the target address during the checking of
1745 ignore_target_hosts.
1747 23. When checking ignore_target_hosts for an ipliteral router, no host name was
1748 being passed; this would have caused $sender_host_name to have been used if
1749 matching the list had actually called for a host name (not very likely,
1750 since this list is usually IP addresses). A host name is now passed as
1753 24. Changed the calls that set up the SIGCHLD handler in the daemon to use the
1754 code that specifies a non-restarting handler (typically sigaction() in
1755 modern systems) in an attempt to fix a rare and obscure crash bug.
1757 25. Narrowed the window for a race in the daemon that could cause it to ignore
1758 SIGCHLD signals. This is not a major problem, because they are used only to
1759 wake it up if nothing else does.
1761 26. A malformed maildirsize file could cause Exim to calculate negative values
1762 for the mailbox size or file count. Odd effects could occur as a result.
1763 The maildirsize information is now recalculated if the size or filecount
1766 27. Added HAVE_SYS_STATVFS_H to the os.h file for Linux, as it has had this
1767 support for a long time. Removed HAVE_SYS_VFS_H.
1769 28. Installed the latest version of exipick from John Jetmore.
1771 29. In an address list, if the pattern was not a regular expression, an empty
1772 subject address (from a bounce message) matched only if the pattern was an
1773 empty string. Non-empty patterns were not even tested. This was the wrong
1774 because it is perfectly reasonable to use an empty address as part of a
1775 database query. An empty address is now tested by patterns that are
1776 lookups. However, all the other forms of pattern expect the subject to
1777 contain a local part and a domain, and therefore, for them, an empty
1778 address still always fails if the pattern is not itself empty.
1780 30. Exim went into a mad DNS loop when attempting to do a callout where the
1781 host was specified on an smtp transport, and looking it up yielded more
1782 than one IP address.
1784 31. Re-factored the code for checking spool and log partition space into a
1785 function that finds that data and another that does the check. The former
1786 is then used to implement four new variables: $spool_space, $log_space,
1787 $spool_inodes, and $log_inodes.
1789 32. The RFC2047 encoding function was originally intended for short strings
1790 such as real names; it was not keeping to the 75-character limit for
1791 encoded words that the RFC imposes. It now respects the limit, and
1792 generates multiple encoded words if necessary. To be on the safe side, I
1793 have increased the buffer size for the ${rfc2047: expansion operator from
1796 33. It is now permitted to omit both strings after an "if" condition; if the
1797 condition is true, the result is "true". As before, when the second string
1798 is omitted, a false condition yields an empty string. This makes it less
1799 cumbersome to write custom ACL and router conditions.
1801 34. Failure to deliver a bounce message always caused it to be frozen, even if
1802 there was an errors_to setting on the router. The errors_to setting is now
1805 35. If an IPv6 address is given for -bh or -bhc, it is now converted to the
1806 canonical form (fully expanded) before being placed in
1807 $sender_host_address.
1809 36. The table in the code that translates DNS record types into text (T_A to
1810 "A" for instance) was missing entries for NS and CNAME. It is just possible
1811 that this could have caused confusion if both these types were looked up
1812 for the same domain, because the text type is used as part of Exim's
1813 per-process caching. But the chance of anyone hitting this buglet seems
1816 37. The dnsdb lookup has been extended in a number of ways.
1818 (1) There is a new type, "zns", which walks up the domain tree until it
1819 finds some nameserver records. It should be used with care.
1821 (2) There is a new type, "mxh", which is like "mx" except that it returns
1822 just the host names, not the priorities.
1824 (3) It is now possible to give a list of domains (or IP addresses) to be
1825 looked up. The behaviour when one of the lookups defers can be
1826 controlled by a keyword.
1828 (4) It is now possible to specify the separator character for use when
1829 multiple records are returned.
1831 38. The dnslists ACL condition has been extended: it is now possible to supply
1832 a list of IP addresses and/or domains to be looked up in a particular DNS
1835 39. Added log_selector=+queue_time_overall.
1837 40. When running the queue in the test harness, wait just a tad after forking a
1838 delivery process, to get repeatability of debugging output.
1840 41. Include certificate and key file names in error message when GnuTLS fails
1841 to set them up, because the GnuTLS error message doesn't include the name
1842 of the failing file when there is a problem reading it.
1844 42. Allow both -bf and -bF in the same test run.
1846 43. Did the same fix as 41 above for OpenSSL, which had the same infelicity.
1848 44. The "Exiscan patch" is now merged into the mainline Exim source.
1850 45. Sometimes the final signoff response after QUIT could fail to get
1851 transmitted in the non-TLS case. Testing !tls_active instead of tls_active
1852 < 0 before doing a fflush(). This bug looks as though it goes back to the
1853 introduction of TLS in release 3.20, but "sometimes" must have been rare
1854 because the tests only now provoked it.
1856 46. Reset the locale to "C" after calling embedded Perl, in case it was changed
1857 (this can affect the format of dates).
1859 47. exim_tidydb, when checking for the continued existence of a message for
1860 which it has found a message-specific retry record, was not finding
1861 messages that were in split spool directories. Consequently, it was
1862 deleting retry records that should have stayed in existence.
1864 48. Steve fixed some bugs in eximstats.
1866 49. The SPA authentication driver was not abandoning authentication and moving
1867 on to the next authenticator when an expansion was forced to fail,
1868 contradicting the general specification for all authenticators. Instead it
1869 was generating a temporary error. It now behaves as specified.
1871 50. The default ordering of permitted cipher suites for GnuTLS was pessimal
1872 (the order specifies the preference for clients). The order is now AES256,
1873 AES128, 3DES, ARCFOUR128.
1875 51. Small patch to Sieve code - explicitly set From: when generating an
1878 52. Exim crashed if a remote delivery caused a very long error message to be
1879 recorded - for instance if somebody sent an entire SpamAssassin report back
1880 as a large number of 550 error lines. This bug was coincidentally fixed by
1881 increasing the size of one of Exim's internal buffers (big_buffer) that
1882 happened as part of the Exiscan merge. However, to be on the safe side, I
1883 have made the code more robust (and fixed the comments that describe what
1886 53. Now that there can be additional text after "Completed" in log lines (if
1887 the queue_time_overall log selector is set), a one-byte patch to exigrep
1888 was needed to allow it to recognize "Completed" as not the last thing in
1891 54. The LDAP lookup was not handling a return of LDAP_RES_SEARCH_REFERENCE. A
1892 patch that reportedly fixes this has been added. I am not expert enough to
1893 create a test for it. This is what the patch creator wrote:
1895 "I found a little strange behaviour of ldap code when working with
1896 Windows 2003 AD Domain, where users was placed in more than one
1897 Organization Units. When I tried to give exim partial DN, the exit code
1898 of ldap_search was unknown to exim because of LDAP_RES_SEARCH_REFERENCE.
1899 But simultaneously result of request was absolutely normal ldap result,
1900 so I produce this patch..."
1902 Later: it seems that not all versions of LDAP support LDAP_RES_SEARCH_
1903 REFERENCE, so I have modified the code to exclude the patch when that macro
1906 55. Some experimental protocols are using DNS PTR records for new purposes. The
1907 keys for these records are domain names, not reversed IP addresses. The
1908 dnsdb PTR lookup now tests whether its key is an IP address. If not, it
1909 leaves it alone. Component reversal etc. now happens only for IP addresses.
1912 56. Improve error message when ldap_search() fails in OpenLDAP or Solaris LDAP.
1914 57. Double the size of the debug message buffer (to 2048) so that more of very
1915 long debug lines gets shown.
1917 58. The exicyclog utility now does better if the number of log files to keep
1918 exceeds 99. In this case, it numbers them 001, 002 ... instead of 01, 02...
1920 59. Two changes related to the smtp_active_hostname option:
1922 (1) $smtp_active_hostname is now available as a variable.
1923 (2) The default for smtp_banner uses $smtp_active_hostname instead
1924 of $primary_hostname.
1926 60. The host_aton() function is supposed to be passed a string that is known
1927 to be a valid IP address. However, in the case of IPv6 addresses, it was
1928 not checking this. This is a hostage to fortune. Exim now panics and dies
1929 if the condition is not met. A case was found where this could be provoked
1930 from a dnsdb PTR lookup with an IPv6 address that had more than 8
1931 components; fortuitously, this particular loophole had already been fixed
1932 by change 4.50/55 above.
1934 If there are any other similar loopholes, the new check in host_aton()
1935 itself should stop them being exploited. The report I received stated that
1936 data on the command line could provoke the exploit when Exim was running as
1937 exim, but did not say which command line option was involved. All I could
1938 find was the use of -be with a bad dnsdb PTR lookup, and in that case it is
1939 running as the user.
1942 61. There was a buffer overflow vulnerability in the SPA authentication code
1943 (which came originally from the Samba project). I have added a test to the
1944 spa_base64_to_bits() function which I hope fixes it.
1947 62. Configuration update for GNU/Hurd and variations. Updated Makefile-GNU and
1948 os.h-GNU, and added configuration files for GNUkFreeBSD and GNUkNetBSD.
1950 63. The daemon start-up calls getloadavg() while still root for those OS that
1951 need the first call to be done as root, but it missed one case: when
1952 deliver_queue_load_max is set with deliver_drop_privilege. This is
1953 necessary for the benefit of the queue runner, because there is no re-exec
1954 when deliver_drop_privilege is set.
1956 64. A call to exiwhat cut short delays set up by "delay" modifiers in ACLs.
1957 This has been fixed.
1959 65. Caching of lookup data for "hosts =" ACL conditions, when a named host list
1960 was in use, was not putting the data itself into the right store pool;
1961 consequently, it could be overwritten for a subsequent message in the same
1962 SMTP connection. (Fix 4.40/11 dealt with the non-cache case, but overlooked
1965 66. Added hosts_max_try_hardlimit to the smtp transport, default 50.
1967 67. The string_is_ip_address() function returns 0, 4, or 6, for "no an IP
1968 address", "IPv4 address", and "IPv6 address", respectively. Some calls of
1969 the function were treating the return as a boolean value, which happened to
1970 work because 0=false and not-0=true, but is not correct code.
1972 68. The host_aton() function was not handling scoped IPv6 addresses (those
1973 with, for example, "%eth0" on the end) correctly.
1975 69. Fixed some compiler warnings in acl.c for the bitmaps specified with
1976 negated items (that is, ~something) in unsigned ints. Some compilers
1977 apparently mutter when there is no cast.
1979 70. If an address verification called from an ACL failed, and did not produce a
1980 user-specific message (i.e. there was only a "system" message), nothing was
1981 put in $acl_verify_message. In this situation, it now puts the system
1984 71. Change 4.23/11 added synchronization checking at the start of an SMTP
1985 session; change 4.31/43 added the unwanted input to the log line - except
1986 that it did not do this in the start of session case. It now does.
1988 72. After a timeout in a callout SMTP session, Exim still sent a QUIT command.
1989 This is wrong and can cause the other end to generate a synchronization
1990 error if it is another Exim or anything else that does the synchronization
1991 check. A QUIT command is no longer sent after a timeout.
1993 73. $host_lookup_deferred has been added, to make it easier to detect DEFERs
1994 during host lookups.
1996 74. The defer_ok option of callout verification was not working if it was used
1997 when verifying addresses in header lines, that is, for this case:
1999 verify = header_sender/callout=defer_ok
2001 75. A backgrounded daemon closed stdin/stdout/stderr on entry; this meant that
2002 those file descriptors could be used for SMTP connections. If anything
2003 wrote to stderr (the example that came up was "warn" in embedded Perl), it
2004 could be sent to the SMTP client, causing chaos. The daemon now opens
2005 stdin, stdout, and stderr to /dev/null when it puts itself into the
2008 76. Arrange for output from Perl's "warn" command to be written to Exim's main
2009 log by default. The user can override this with suitable Perl magic.
2011 77. The use of log_message on a "discard" ACL verb, which is supposed to add to
2012 the log message when discard triggers, was not working for the DATA ACL or
2013 for the non-SMTP ACL.
2015 78. Error message wording change in sieve.c.
2017 79. If smtp_accept_max_per_host was set, the number of connections could be
2018 restricted to fewer than expected, because the daemon was trying to set up
2019 a new connection before checking whether the processes handling previous
2020 connections had finished. The check for completed processes is now done
2021 earlier. On busy systems, this bug wouldn't be noticed because something
2022 else would have woken the daemon, and it would have reaped the completed
2025 80. If a message was submitted locally by a user whose login name contained one
2026 or more spaces (ugh!), the spool file that Exim wrote was not re-readable.
2027 It caused a spool format error. I have fixed the spool reading code. A
2028 related problem was that the "from" clause in the Received: line became
2029 illegal because of the space(s). It is now covered by ${quote_local_part.
2031 81. Included the latest eximstats from Steve (adds average sizes to HTML Top
2034 82. Updated OS/Makefile-AIX as per message from Mike Meredith.
2036 83. Patch from Sieve maintainer to fix unterminated string problem in
2037 "vacation" handling.
2039 84. Some minor changes to the Linux configuration files to help with other
2040 OS variants using glibc.
2042 85. One more patch for Sieve to update vacation handling to latest spec.
2045 ----------------------------------------------------
2046 See the note above about the 4.44 and 4.50 releases.
2047 ----------------------------------------------------
2053 1. Change 4.43/35 introduced a bug that caused file counts to be
2054 incorrectly computed when quota_filecount was set in an appendfile
2057 2. Closing a stable door: arrange to panic-die if setitimer() ever fails. The
2058 bug fixed in 4.43/37 would have been diagnosed quickly if this had been in
2061 3. Give more explanation in the error message when the command for a transport
2062 filter fails to execute.
2064 4. There are several places where Exim runs a non-Exim command in a
2065 subprocess. The SIGUSR1 signal should be disabled for these processes. This
2066 was being done only for the command run by the queryprogram router. It is
2067 now done for all such subprocesses. The other cases are: ${run, transport
2068 filters, and the commands run by the lmtp and pipe transports.
2070 5. Some older OS have a limit of 256 on the maximum number of file
2071 descriptors. Exim was using setrlimit() to set 1000 as a large value
2072 unlikely to be exceeded. Change 4.43/17 caused a lot of logging on these
2073 systems. I've change it so that if it can't get 1000, it tries for 256.
2075 6. "control=submission" was allowed, but had no effect, in a DATA ACL. This
2076 was an oversight, and furthermore, ever since the addition of extra
2077 controls (e.g. 4.43/32), the checks on when to allow different forms of
2078 "control" were broken. There should now be diagnostics for all cases when a
2079 control that does not make sense is encountered.
2081 7. $recipients is now available in the predata ACL (oversight).
2083 8. Tidy the search cache before the fork to do a delivery from a message
2084 received from the command line. Otherwise the child will trigger a lookup
2085 failure and thereby defer the delivery if it tries to use (for example) a
2086 cached ldap connection that the parent has called unbind on.
2088 9. If verify=recipient was followed by verify=sender in a RCPT ACL, the value
2089 of $address_data from the recipient verification was clobbered by the
2090 sender verification.
2092 10. If FIXED_NEVER_USERS was defined, but empty, Exim was assuming the uid 0
2093 was its contents. (It was OK if the option was not defined at all.)
2095 11. A "Completed" log line is now written for messages that are removed from
2096 the spool by the -Mrm option.
2098 12. $host_address is now set to the target address during the checking of
2099 ignore_target_hosts.
2101 13. When checking ignore_target_hosts for an ipliteral router, no host name was
2102 being passed; this would have caused $sender_host_name to have been used if
2103 matching the list had actually called for a host name (not very likely,
2104 since this list is usually IP addresses). A host name is now passed as
2107 14. Changed the calls that set up the SIGCHLD handler in the daemon to use the
2108 code that specifies a non-restarting handler (typically sigaction() in
2109 modern systems) in an attempt to fix a rare and obscure crash bug.
2111 15. Narrowed the window for a race in the daemon that could cause it to ignore
2112 SIGCHLD signals. This is not a major problem, because they are used only to
2113 wake it up if nothing else does.
2115 16. A malformed maildirsize file could cause Exim to calculate negative values
2116 for the mailbox size or file count. Odd effects could occur as a result.
2117 The maildirsize information is now recalculated if the size or filecount
2120 17. Added HAVE_SYS_STATVFS_H to the os.h file for Linux, as it has had this
2121 support for a long time. Removed HAVE_SYS_VFS_H.
2123 18. Updated exipick to current release from John Jetmore.
2125 19. Allow an empty sender to be matched against a lookup in an address list.
2126 Previously the only cases considered were a regular expression, or an
2129 20. Exim went into a mad DNS lookup loop when doing a callout where the
2130 host was specified on the transport, if the DNS lookup yielded more than
2133 21. The RFC2047 encoding function was originally intended for short strings
2134 such as real names; it was not keeping to the 75-character limit for
2135 encoded words that the RFC imposes. It now respects the limit, and
2136 generates multiple encoded words if necessary. To be on the safe side, I
2137 have increased the buffer size for the ${rfc2047: expansion operator from
2140 22. Failure to deliver a bounce message always caused it to be frozen, even if
2141 there was an errors_to setting on the router. The errors_to setting is now
2144 23. If an IPv6 address is given for -bh or -bhc, it is now converted to the
2145 canonical form (fully expanded) before being placed in
2146 $sender_host_address.
2148 24. Updated eximstats to version 1.33
2150 25. Include certificate and key file names in error message when GnuTLS fails
2151 to set them up, because the GnuTLS error message doesn't include the name
2152 of the failing file when there is a problem reading it.
2154 26. Expand error message when OpenSSL has problems setting up cert/key files.
2157 27. Reset the locale to "C" after calling embedded Perl, in case it was changed
2158 (this can affect the format of dates).
2160 28. exim_tidydb, when checking for the continued existence of a message for
2161 which it has found a message-specific retry record, was not finding
2162 messages that were in split spool directories. Consequently, it was
2163 deleting retry records that should have stayed in existence.
2165 29. eximstats updated to version 1.35
2166 1.34 - allow eximstats to parse syslog lines as well as mainlog lines
2167 1.35 - bugfix such that pie charts by volume are generated correctly
2169 30. The SPA authentication driver was not abandoning authentication and moving
2170 on to the next authenticator when an expansion was forced to fail,
2171 contradicting the general specification for all authenticators. Instead it
2172 was generating a temporary error. It now behaves as specified.
2174 31. The default ordering of permitted cipher suites for GnuTLS was pessimal
2175 (the order specifies the preference for clients). The order is now AES256,
2176 AES128, 3DES, ARCFOUR128.
2178 31. Small patch to Sieve code - explicitly set From: when generating an
2181 32. Exim crashed if a remote delivery caused a very long error message to be
2182 recorded - for instance if somebody sent an entire SpamAssassin report back
2183 as a large number of 550 error lines. This bug was coincidentally fixed by
2184 increasing the size of one of Exim's internal buffers (big_buffer) that
2185 happened as part of the Exiscan merge. However, to be on the safe side, I
2186 have made the code more robust (and fixed the comments that describe what
2189 33. Some experimental protocols are using DNS PTR records for new purposes. The
2190 keys for these records are domain names, not reversed IP addresses. The
2191 dnsdb PTR lookup now tests whether its key is an IP address. If not, it
2192 leaves it alone. Component reversal etc. now happens only for IP addresses.
2195 34. The host_aton() function is supposed to be passed a string that is known
2196 to be a valid IP address. However, in the case of IPv6 addresses, it was
2197 not checking this. This is a hostage to fortune. Exim now panics and dies
2198 if the condition is not met. A case was found where this could be provoked
2199 from a dnsdb PTR lookup with an IPv6 address that had more than 8
2200 components; fortuitously, this particular loophole had already been fixed
2201 by change 4.50/55 or 4.44/33 above.
2203 If there are any other similar loopholes, the new check in host_aton()
2204 itself should stop them being exploited. The report I received stated that
2205 data on the command line could provoke the exploit when Exim was running as
2206 exim, but did not say which command line option was involved. All I could
2207 find was the use of -be with a bad dnsdb PTR lookup, and in that case it is
2208 running as the user.
2211 35. There was a buffer overflow vulnerability in the SPA authentication code
2212 (which came originally from the Samba project). I have added a test to the
2213 spa_base64_to_bits() function which I hope fixes it.
2216 36. The daemon start-up calls getloadavg() while still root for those OS that
2217 need the first call to be done as root, but it missed one case: when
2218 deliver_queue_load_max is set with deliver_drop_privilege. This is
2219 necessary for the benefit of the queue runner, because there is no re-exec
2220 when deliver_drop_privilege is set.
2222 37. Caching of lookup data for "hosts =" ACL conditions, when a named host list
2223 was in use, was not putting the data itself into the right store pool;
2224 consequently, it could be overwritten for a subsequent message in the same
2225 SMTP connection. (Fix 4.40/11 dealt with the non-cache case, but overlooked
2228 38. Sometimes the final signoff response after QUIT could fail to get
2229 transmitted in the non-TLS case. Testing !tls_active instead of tls_active
2230 < 0 before doing a fflush(). This bug looks as though it goes back to the
2231 introduction of TLS in release 3.20, but "sometimes" must have been rare
2232 because the tests only now provoked it.
2238 1. Fixed a longstanding but relatively impotent bug: a long time ago, before
2239 PIPELINING, the function smtp_write_command() used to return TRUE or FALSE.
2240 Now it returns an integer. A number of calls were still expecting a T/F
2241 return. Fortuitously, in all cases, the tests worked in OK situations,
2242 which is the norm. However, things would have gone wrong on any write
2243 failures on the smtp file descriptor. This function is used when sending
2244 messages over SMTP and also when doing verify callouts.
2246 2. When Exim is called to do synchronous delivery of a locally submitted
2247 message (the -odf or -odi options), it no longer closes stderr before doing
2250 3. Implemented the mua_wrapper option.
2252 4. Implemented mx_fail_domains and srv_fail_domains for the dnslookup router.
2254 5. Implemented the functions header_remove(), header_testname(),
2255 header_add_at_position(), and receive_remove_recipient(), and exported them
2258 6. If an ACL "warn" statement specified the addition of headers, Exim already
2259 inserted X-ACL-Warn: at the start if there was no header name. However, it
2260 was not making this test for the second and subsequent header lines if
2261 there were newlines in the string. This meant that an invalid header could
2262 be inserted if Exim was badly configured.
2264 7. Allow an ACL "warn" statement to add header lines at the start or after all
2265 the Received: headers, as well as at the end.
2267 8. Added the rcpt_4xx retry error code.
2269 9. Added postmaster_mailfrom=xxx to callout verification option.
2271 10. Added mailfrom=xxxx to the callout verification option, for verify=
2274 11. ${substr_1_:xxxx} and ${substr__3:xxxx} are now diagnosed as syntax errors
2275 (they previously behaved as ${substr_1_0:xxxx} and ${substr:_0_3:xxxx}).
2277 12. Inserted some casts to stop certain compilers warning when using pointer
2278 differences as field lengths or precisions in printf-type calls (mostly
2279 affecting debugging statements).
2281 13. Added optional readline() support for -be (dynamically loaded).
2283 14. Obscure bug fix: if a message error (e.g. 4xx to MAIL) happened within the
2284 same clock tick as a message's arrival, so that its received time was the
2285 same as the "first fail" time on the retry record, and that message
2286 remained on the queue past the ultimate address timeout, every queue runner
2287 would try a delivery (because it was past the ultimate address timeout) but
2288 after another failure, the ultimate address timeout, which should have then
2289 bounced the address, did not kick in. This was a "< instead of <=" error;
2290 in most cases the first failure would have been in the next clock tick
2291 after the received time, and all would be well.
2293 15. The special items beginning with @ in domain lists (e.g. @mx_any) were not
2294 being recognized when the domain list was tested by the match_domain
2295 condition in an expansion string.
2297 16. Added the ${str2b64: operator.
2299 17. Exim was always calling setrlimit() to set a large limit for the number of
2300 processes, without checking whether the existing limit was already
2301 adequate. (It did check for the limit on file descriptors.) Furthermore,
2302 errors from getrlimit() and setrlimit() were being ignored. Now they are
2303 logged to the main and panic logs, but Exim does carry on, to try to do its
2304 job under whatever limits there are.
2306 18. Imported PCRE 5.0.
2308 19. Trivial typo in log message " temporarily refused connection" (the leading
2311 20. If the log selector return_path_on_delivery was set and an address was
2312 redirected to /dev/null, the delivery process crashed because it assumed
2313 that a return path would always be set for a "successful" delivery. In this
2314 case, the whole delivery is bypassed as an optimization, and therefore no
2317 21. Internal re-arrangement: the function for sending a challenge and reading
2318 a response while authentication was assuming a zero-terminated challenge
2319 string. It's now changed to take a pointer and a length, to allow for
2320 binary data in such strings.
2322 22. Added the cyrus_sasl authenticator (code supplied by MBM).
2324 23. Exim was not respecting finduser_retries when seeking the login of the
2325 uid under which it was called; it was always trying 10 times. (The default
2326 setting of finduser_retries is zero.) Also, it was sleeping after the final
2327 failure, which is pointless.
2329 24. Implemented tls_on_connect_ports.
2331 25. Implemented acl_smtp_predata.
2333 26. If the domain in control=submission is set empty, Exim assumes that the
2334 authenticated id is a complete email address when it generates From: or
2335 Sender: header lines.
2337 27. Added "#define SOCKLEN_T int" to OS/os.h-SCO and OS/os.h-SCO_SV. Also added
2338 definitions to OS/Makefile-SCO and OS/Makefile-SCO_SV that put basename,
2339 chown and chgrp in /bin and hostname in /usr/bin.
2341 28. Exim was keeping the "process log" file open after each use, just as it
2342 does for the main log. This opens the possibility of it remaining open for
2343 long periods when the USR1 signal hits a daemon. Occasional processlog
2344 errors were reported, that could have been caused by this. Anyway, it seems
2345 much more sensible not to leave this file open at all, so that is what now
2348 29. The long-running daemon process does not normally write to the log once it
2349 has entered its main loop, and it closes the log before doing so. This is
2350 so that log files can straightforwardly be renamed and moved. However,
2351 there are a couple of unusual error situations where the daemon does write
2352 log entries, and I had neglected to close the log afterwards.
2354 30. The text of an SMTP error response that was received during a remote
2355 delivery was being truncated at 512 bytes. This is too short for some of
2356 the long messages that one sometimes sees. I've increased the limit to
2359 31. It is now possible to make retry rules that apply only when a message has a
2360 specific sender, in particular, an empty sender.
2362 32. Added "control = enforce_sync" and "control = no_enforce_sync". This makes
2363 it possible to be selective about when SMTP synchronization is enforced.
2365 33. Added "control = caseful_local_part" and "control = "caselower_local_part".
2367 32. Implemented hosts_connection_nolog.
2369 33. Added an ACL for QUIT.
2371 34. Setting "delay_warning=" to disable warnings was not working; it gave a
2374 35. Added mailbox_size and mailbox_filecount to appendfile.
2376 36. Added control = no_multiline_responses to ACLs.
2378 37. There was a bug in the logic of the code that waits for the clock to tick
2379 in the case where the clock went backwards by a substantial amount such
2380 that the microsecond fraction of "now" was more than the microsecond
2381 fraction of "then" (but the whole seconds number was less).
2383 38. Added support for the libradius Radius client library this is found on
2384 FreeBSD (previously only the radiusclient library was supported).
2390 1. When certain lookups returned multiple values in the form name=value, the
2391 quoting of the values was not always being done properly. Specifically:
2392 (a) If the value started with a double quote, but contained no whitespace,
2394 (b) If the value contained whitespace other than a space character (i.e.
2395 tabs or newlines or carriage returns) it was not quoted.
2396 This fix has been applied to the mysql and pgsql lookups by writing a
2397 separate quoting function and calling it from the lookup code. The fix
2398 should probably also be applied to nisplus, ibase and oracle lookups, but
2399 since I cannot test any of those, I have not disturbed their existing code.
2401 2. A hit in the callout cache for a specific address caused a log line with no
2402 reason for rejecting RCPT. Now it says "Previous (cached) callout
2403 verification failure".
2405 3. There was an off-by-one bug in the queryprogram router. An over-long
2406 return line was truncated at 256 instead of 255 characters, thereby
2407 overflowing its buffer with the terminating zero. As well as fixing this, I
2408 have increased the buffer size to 1024 (and made a note to document this).
2410 4. If an interrupt, such as the USR1 signal that is send by exiwhat, arrives
2411 when Exim is waiting for an SMTP response from a remote server, Exim
2412 restarts its select() call on the socket, thereby resetting its timeout.
2413 This is not a problem when such interrupts are rare. Somebody set up a cron
2414 job to run exiwhat every 2 minutes, which is less than the normal select()
2415 timeout (5 or 10 minutes). This meant that the select() timeout never
2416 kicked in because it was always reset. I have fixed this by comparing the
2417 time when an interrupt arrives with the time at the start of the first call
2418 to select(). If more time than the timeout has elapsed, the interrupt is
2419 treated as a timeout.
2421 5. Some internal re-factoring in preparation for the addition of Sieve
2422 extensions (by MH). In particular, the "personal" test is moved to a
2423 separate function, and given an option for scanning Cc: and Bcc: (which is
2424 not set for Exim filters).
2426 6. When Exim created an email address using the login of the caller as the
2427 local part (e.g. when creating a From: or Sender: header line), it was not
2428 quoting the local part when it contained special characters such as @.
2430 7. Installed new OpenBSD configuration files.
2432 8. Reworded some messages for syntax errors in "and" and "or" conditions to
2433 try to make them clearer.
2435 9. Callout options, other than the timeout value, were being ignored when
2436 verifying sender addresses in header lines. For example, when using
2438 verify = header_sender/callout=no_cache
2440 the cache was (incorrectly) being used.
2442 10. Added a missing instance of ${EXE} to the exim_install script; this affects
2443 only the Cygwin environment.
2445 11. When return_path_on_delivery was set as a log selector, if different remote
2446 addresses in the same message used different return paths and parallel
2447 remote delivery occurred, the wrong values would sometimes be logged.
2448 (Whenever a remote delivery process finished, the return path value from
2449 the most recently started remote delivery process was logged.)
2451 12. RFC 3848 specifies standard names for the "with" phrase in Received: header
2452 lines when AUTH and/or TLS are in use. This is the "received protocol"
2453 field. Exim used to use "asmtp" for authenticated SMTP, without any
2454 indication (in the protocol name) for TLS use. Now it follows the RFC and
2455 uses "esmtpa" if the connection is authenticated, "esmtps" if it is
2456 encrypted, and "esmtpsa" if it is both encrypted and authenticated. These
2457 names appear in log lines as well as in Received: header lines.
2459 13. Installed MH's patches for Sieve to add the "copy" and "vacation"
2460 extensions, and comparison tests, and to fix some bugs.
2462 14. Changes to the "personal" filter test:
2464 (1) The test was buggy in that it was just doing the equivalent of
2465 "contains" tests on header lines. For example, if a user's address was
2466 anne@some.where, the "personal" test would incorrectly be true for
2468 To: susanne@some.where
2470 This test is now done by extracting each address from the header in turn,
2471 and checking the entire address. Other tests that are part of "personal"
2472 are now done using regular expressions (for example, to check local parts
2473 of addresses in From: header lines).
2475 (2) The list of non-personal local parts in From: addresses has been
2476 extended to include "listserv", "majordomo", "*-request", and "owner-*",
2477 taken from the Sieve specification recommendations.
2479 (3) If the message contains any header line starting with "List-" it is
2480 treated as non-personal.
2482 (4) The test for "circular" in the Subject: header line has been removed
2483 because it now seems ill-conceived.
2485 15. Minor typos in src/EDITME comments corrected.
2487 16. Installed latest exipick from John Jetmore.
2489 17. If headers_add on a router specified a text string that was too long for
2490 string_sprintf() - that is, longer than 8192 bytes - Exim panicked. The use
2491 of string_sprintf() is now avoided.
2493 18. $message_body_size was not set (it was always zero) when running the DATA
2494 ACL and the local_scan() function.
2496 19. For the "mail" command in an Exim filter, no default was being set for
2497 the once_repeat time, causing a random time value to be used if "once" was
2498 specified. (If the value happened to be <= 0, no repeat happened.) The
2499 default is now 0s, meaning "never repeat". The "vacation" command was OK
2500 (its default is 7d). It's somewhat surprising nobody ever noticed this bug
2501 (I found it when inspecting the code).
2503 20. There is now an overall timeout for performing a callout verification. It
2504 defaults to 4 times the callout timeout, which applies to individual SMTP
2505 commands during the callout. The overall timeout applies when there is more
2506 than one host that can be tried. The timeout is checked before trying the
2507 next host. This prevents very long delays if there are a large number of
2508 hosts and all are timing out (e.g. when the network connections are timing
2509 out). The value of the overall timeout can be changed by specifying an
2510 additional sub-option for "callout", called "maxwait". For example:
2512 verify = sender/callout=5s,maxwait=20s
2514 21. Add O_APPEND to the open() call for maildirsize files (Exim already seeks
2515 to the end before writing, but this should make it even safer).
2517 22. Exim was forgetting that it had advertised PIPELINING for the second and
2518 subsequent messages on an SMTP connection. It was also not resetting its
2519 memory on STARTTLS and an internal HELO.
2521 23. When Exim logs an SMTP synchronization error within a session, it now
2522 records whether PIPELINING has been advertised or not.
2524 24. Added 3 instances of "(long int)" casts to time_t variables that were being
2525 formatted using %ld, because on OpenBSD (and perhaps others), time_t is int
2526 rather than long int.
2528 25. Installed the latest Cygwin configuration files from the Cygwin maintainer.
2530 26. Added the never_mail option to autoreply.
2536 1. A reorganization of the code in order to implement 4.40/8 caused a daemon
2537 crash if the getsockname() call failed; this can happen if a connection is
2538 closed very soon after it is established. The problem was simply in the
2539 order in which certain operations were done, causing Exim to try to write
2540 to the SMTP stream before it had set up the file descriptor. The bug has
2541 been fixed by making things happen in the correct order.
2547 1. If "drop" was used in a DATA ACL, the SMTP output buffer was not flushed
2548 before the connection was closed, thus losing the rejection response.
2550 2. Commented out the definition of SOCKLEN_T in os.h-SunOS5. It is needed for
2551 some early Solaris releases, but causes trouble in current releases where
2552 socklen_t is defined.
2554 3. When std{in,out,err} are closed, re-open them to /dev/null so that they
2557 4. Minor refactoring of os.c-Linux to avoid compiler warning when IPv6 is not
2560 5. Refactoring in expand.c to improve memory usage. Pre-allocate a block so
2561 that releasing the top of it at the end releases what was used for sub-
2562 expansions (unless the block got too big). However, discard this block if
2563 the first thing is a variable or header, so that we can use its block when
2564 it is dynamic (useful for very large $message_headers, for example).
2566 6. Lookups now cache *every* query, not just the most recent. A new, separate
2567 store pool is used for this. It can be recovered when all lookup caches are
2568 flushed. Lookups now release memory at the end of their result strings.
2569 This has involved some general refactoring of the lookup sources.
2571 7. Some code has been added to the store_xxx() functions to reduce the amount
2572 of flapping under certain conditions.
2574 8. log_incoming_interface used to affect only the <= reception log lines. Now
2575 it causes the local interface and port to be added to several more SMTP log
2576 lines, for example "SMTP connection from", and rejection lines.
2578 9. The Sieve author supplied some patches for the doc/README.SIEVE file.
2580 10. Added a conditional definition of _BSD_SOCKLEN_T to os.h-Darwin.
2582 11. If $host_data was set by virtue of a hosts lookup in an ACL, its value
2583 could be overwritten at the end of the current message (or the start of a
2584 new message if it was set in a HELO ACL). The value is now preserved for
2585 the duration of the SMTP connection.
2587 12. If a transport had a headers_rewrite setting, and a matching header line
2588 contained an unqualified address, that address was qualified, even if it
2589 did not match any rewriting rules. The underlying bug was that the values
2590 of the flags that permit the existence of unqualified sender and recipient
2591 addresses in header lines (set by {sender,recipient}_unqualified_hosts for
2592 non-local messages, and by -bnq for local messages) were not being
2593 preserved with the message after it was received.
2595 13. When Exim was logging an SMTP synchronization error, it could sometimes log
2596 "next input=" as part of the text comprising the host identity instead of
2597 the correct text. The code was using the same buffer for two different
2598 strings. However, depending on which order the printing function evaluated
2599 its arguments, the bug did not always show up. Under Linux, for example, my
2600 test suite worked just fine.
2602 14. Exigrep contained a use of Perl's "our" scoping after change 4.31/70. This
2603 doesn't work with some older versions of Perl. It has been changed to "my",
2604 which in any case is probably the better facility to use.
2606 15. A really picky compiler found some instances of statements for creating
2607 error messages that either had too many or two few arguments for the format
2610 16. The size of the buffer for calls to the DNS resolver has been increased
2611 from 1024 to 2048. A larger buffer is needed when performing PTR lookups
2612 for addresses that have a lot of PTR records. This alleviates a problem; it
2613 does not fully solve it.
2615 17. A dnsdb lookup for PTR records that receives more data than will fit in the
2616 buffer now truncates the list and logs the incident, which is the same
2617 action as happens when Exim is looking up a host name and its aliases.
2618 Previously in this situation something unpredictable would happen;
2619 sometimes it was "internal error: store_reset failed".
2621 18. If a server dropped the connection unexpectedly when an Exim client was
2622 using GnuTLS and trying to read a response, the client delivery process
2623 crashed while trying to generate an error log message.
2625 19. If a "warn" verb in an ACL added multiple headers to a message in a single
2626 string, for example:
2628 warn message = H1: something\nH2: something
2630 the text was added as a single header line from Exim's point of view
2631 though it ended up OK in the delivered message. However, searching for the
2632 second and subsequent header lines using $h_h2: did not work. This has been
2633 fixed. Similarly, if a system filter added multiple headers in this way,
2634 the routers could not see them.
2636 20. Expanded the error message when iplsearch is called with an invalid key to
2637 suggest using net-iplsearch in a host list.
2639 21. When running tests using -bh, any delays imposed by "delay" modifiers in
2640 ACLs are no longer actually imposed (and a message to that effect is
2643 22. If a "gecos" field in a passwd entry contained escaped characters, in
2644 particular, if it contained a \" sequence, Exim got it wrong when building
2645 a From: or a Sender: header from that name. A second bug also caused
2646 incorrect handling when an unquoted " was present following a character
2647 that needed quoting.
2649 23. "{crypt}" as a password encryption mechanism for a "crypteq" expansion item
2650 was not being matched caselessly.
2652 24. Arranged for all hyphens in the exim.8 source to be escaped with
2655 25. Change 16 of 4.32, which reversed 71 or 4.31 didn't quite do the job
2656 properly. Recipient callout cache records were still being keyed to include
2657 the sender, even when use_sender was set false. This led to far more
2658 callouts that were necessary. The sender is no longer included in the key
2659 when use_sender is false.
2661 26. Added "control = submission" modifier to ACLs.
2663 27. Added the ${base62d: operator to decode base 62 numbers.
2665 28. dnsdb lookups can now access SRV records.
2667 29. CONFIGURE_OWNER can be set at build time to define an alternative owner for
2668 the configuration file.
2670 30. The debug message "delivering xxxxxx-xxxxxx-xx" is now output in verbose
2671 (-v) mode. This makes the output for a verbose queue run more intelligible.
2673 31. Added a use_postmaster feature to recipient callouts.
2675 32. Added the $body_zerocount variable, containing the number of binary zero
2676 bytes in the message body.
2678 33. The time of last modification of the "new" subdirectory is now used as the
2679 "mailbox time last read" when there is a quota error for a maildir
2682 34. Added string comparison operators lt, lti, le, lei, gt, gti, ge, gei.
2684 35. Added +ignore_unknown as a special item in host lists.
2686 36. Code for decoding IPv6 addresses in host lists is now included, even if
2687 IPv6 support is not being compiled. This fixes a bug in which an IPv6
2688 address was recognized as an IP address, but was then not correctly decoded
2689 into binary, causing unexpected and incorrect effects when compared with
2696 1. Very minor rewording of debugging text in manualroute to say "list of
2697 hosts" instead of "hostlist".
2699 2. If verify=header_syntax was set, and a header line with an unqualified
2700 address (no domain) and a large number of spaces between the end of the
2701 name and the colon was received, the reception process suffered a buffer
2702 overflow, and (when I tested it) crashed. This was caused by some obsolete
2703 code that should have been removed. The fix is to remove it!
2705 3. When running in the test harness, delay a bit after writing a bounce
2706 message to get a bit more predictability in the log output.
2708 4. Added a call to search_tidyup() just before forking a reception process. In
2709 theory, someone could use a lookup in the expansion of smtp_accept_max_
2710 per_host which, without the tidyup, could leave open a database connection.
2712 5. Added the variables $recipient_data and $sender_data which get set from a
2713 lookup success in an ACL "recipients" or "senders" condition, or a router
2714 "senders" option, similar to $domain_data and $local_part_data.
2716 6. Moved the writing of debug_print from before to after the "senders" test
2719 7. Change 4.31/66 (moving the time when the Received: is generated) caused
2720 problems for message scanning, either using a data ACL, or using
2721 local_scan() because the Received: header was not generated till after they
2722 were called (in order to set the time as the time of reception completion).
2723 I have revised the way this works. The header is now generated after the
2724 body is received, but before the ACL or local_scan() are called. After they
2725 are run, the timestamp in the header is updated.
2731 1. Change 4.24/6 introduced a bug because the SIGALRM handler was disabled
2732 before starting a queue runner without re-exec. This happened only when
2733 deliver_drop_privilege was set or when the Exim user was set to root. The
2734 effect of the bug was that timeouts during subsequent deliveries caused
2735 crashes instead of being properly handled. The handler is now left at its
2736 default (and expected) setting.
2738 2. The other case in which a daemon avoids a re-exec is to deliver an incoming
2739 message, again when deliver_drop_privilege is set or Exim is run as root.
2740 The bug described in (1) was not present in this case, but the tidying up
2741 of the other signals was missing. I have made the two cases consistent.
2743 3. The ignore_target_hosts setting on a manualroute router was being ignored
2744 for hosts that were looked up using the /MX notation.
2746 4. Added /ignore=<ip list> feature to @mx_any, @mx_primary, and @mx_secondary
2749 5. Change 4.31/55 was buggy, and broke when there was a rewriting rule that
2750 operated on the sender address. After changing the $sender_address to <>
2751 for the sender address verify, Exim was re-instated it as the original
2752 (before rewriting) address, but remembering that it had rewritten it, so it
2753 wasn't rewriting it again. This bug also had the effect of breaking the
2754 sender address verification caching when the sender address was rewritten.
2756 6. The ignore_target_hosts option was being ignored by the ipliteral router.
2757 This has been changed so that if the ip literal address matches
2758 ignore_target_hosts, the router declines.
2760 7. Added expansion conditions match_domain, match_address, and match_local_
2761 part (NOT match_host).
2763 8. The placeholder for the Received: header didn't have a length field set.
2765 9. Added code to Exim itself and to exim_lock to test for a specific race
2766 condition that could lead to file corruption when using MBX delivery. The
2767 issue is with the lockfile that is created in /tmp. If this file is removed
2768 after a process has opened it but before that process has acquired a lock,
2769 there is the potential for a second process to recreate the file and also
2770 acquire a lock. This could lead to two Exim processes writing to the file
2771 at the same time. The added code performs the same test as UW imapd; it
2772 checks after acquiring the lock that its file descriptor still refers to
2773 the same named file.
2775 10. The buffer for building added header lines was of fixed size, 8192 bytes.
2776 It is now parameterized by HEADER_ADD_BUFFER_SIZE and this can be adjusted
2779 11. Added the smtp_active_hostname option. If used, this will typically be made
2780 to depend on the incoming interface address. Because $interface_address is
2781 not set up until the daemon has forked a reception process, error responses
2782 that can happen earlier (such as "too many connections") no longer contain
2785 12. If an expansion in a condition on a "warn" statement fails because a lookup
2786 defers, the "warn" statement is abandoned, and the next ACL statement is
2787 processed. Previously this caused the whole ACL to be aborted.
2789 13. Added the iplsearch lookup type.
2791 14. Added ident_timeout as a log selector.
2793 15. Added tls_certificate_verified as a log selector.
2795 16. Added a global option tls_require_ciphers (compare the smtp transport
2796 option of the same name). This controls incoming TLS connections.
2798 17. I finally figured out how to make tls_require_ciphers do a similar thing
2799 in GNUtls to what it does in OpenSSL, that is, set up an appropriate list
2800 before starting the TLS session.
2802 18. Tabs are now shown as \t in -bP output.
2804 19. If the log selector return_path_on_delivery was set, Exim crashed when
2805 bouncing a message because it had too many Received: header lines.
2807 20. If two routers both had headers_remove settings, and the first one included
2808 a superfluous trailing colon, the final name in the first list and the
2809 first name in the second list were incorrectly joined into one item (with a
2810 colon in the middle).
2816 1. Added -C and -D options to the exinext utility, mainly to make it easier
2817 to include in the automated testing, but these could be helpful when
2818 multiple configurations are in use.
2820 2. The exinext utility was not formatting the output nicely when there was
2821 an alternate port involved in the retry record key, nor when there was a
2822 message id as well (for retries that were specific to a specific message
2823 and a specific host). It was also confused by IPv6 addresses, because of
2824 the additional colons they contain. I have fixed the IPv4 problem, and
2825 patched it up to do a reasonable job for IPv6.
2827 3. When there is an error after a MAIL, RCPT, or DATA SMTP command during
2828 delivery, the log line now contains "pipelined" if PIPELINING was used.
2830 4. An SMTP transport process used to panic and die if the bind() call to set
2831 an explicit outgoing interface failed. This has been changed; it is now
2832 treated in the same way as a connect() failure.
2834 5. A reference to $sender_host_name in the part of a conditional expansion
2835 that was being skipped was still causing a DNS lookup. This no longer
2838 6. The def: expansion condition was not recognizing references to header lines
2839 that used bh_ and bheader_.
2841 7. Added the _cache feature to named lists.
2843 8. The code for checking quota_filecount in the appendfile transport was
2844 allowing one more file than it should have been.
2846 9. For compatibility with Sendmail, the command line option
2854 and sets the incoming protocol and host name (for trusted callers). The
2855 host name and its colon can be omitted when only the protocol is to be set.
2856 Note the Exim already has two private options, -pd and -ps, that refer to
2857 embedded Perl. It is therefore impossible to set a protocol value of "d" or
2858 "s", but I don't think that's a major issue.
2860 10. A number of refactoring changes to the code, none of which should affect
2863 (a) The number of logging options was getting close to filling up the
2864 32-bit word that was used as a bit map. I have split them into two classes:
2865 those that are passed in the argument to log_write(), and those that are
2866 only ever tested independently outside of that function. These are now in
2867 separate 32-bit words, so there is plenty of room for expansion again.
2868 There is no change in the user interface or the logging behaviour.
2870 (b) When building, for example, log lines, the code previously used a
2871 macro that called string_cat() twice, in order to add two strings. This is
2872 not really sufficiently general. Furthermore, there was one instance where
2873 it was actually wrong because one of the argument was used twice, and in
2874 one call a function was used. (As it happened, calling the function twice
2875 did not affect the overall behaviour.) The macro has been replaced by a
2876 function that can join an arbitrary number of extra strings onto a growing
2879 (c) The code for expansion conditions now uses a table and a binary chop
2880 instead of a serial search (which was left over from when there were very
2881 few conditions). Also, it now recognizes conditions like "pam" even when
2882 the relevant support is not compiled in: a suitably worded error message is
2883 given if an attempt is made to use such a condition.
2885 11. Added ${time_interval:xxxxx}.
2887 12. A bug was causing one of the ddress fields not to be passed back correctly
2888 from remote delivery subprocesses. The field in question was not being
2889 subsequently used, so this caused to problems in practice.
2891 13. Added new log selectors queue_time and deliver_time.
2893 14. Might have fixed a bug in maildirsizefile handling that threw up
2894 "unexpected character" debug warnings, and recalculated the data
2895 unnecessarily. In any case, I expanded the warning message to give more
2898 15. Added the message "Restricted characters in address" to the statements in
2899 the default ACL that block characters like @ and % in local parts.
2901 16. Change 71 for release 4.31 proved to be much less benign that I imagined.
2902 Three changes have been made:
2904 (a) There was a serious bug; a negative response to MAIL caused the whole
2905 recipient domain to be cached as invalid, thereby blocking all messages
2906 to all local parts at the same domain, from all senders. This bug has
2907 been fixed. The domain is no longer cached after a negative response to
2908 MAIL if the sender used is not empty.
2910 (b) The default behaviour of using MAIL FROM:<> for recipient callouts has
2913 (c) A new callout option, "use_sender" has been added for people who want
2914 the modified behaviour.
2920 1. Removed "EXTRALIBS=-lwrap" from OS/Makefile-Unixware7 on the advice of
2923 2. Removed "LIBS = -lresolv" from OS/Makefile-Darwin as it is not needed, and
2924 indeed breaks things for older releases.
2926 3. Added additional logging to the case where there is a problem reading data
2927 from a filter that is running in a subprocess using a pipe, in order to
2928 try to track down a specific problem.
2930 4. Testing facility fudge: when running in the test harness and attempting
2931 to connect to 10.x.x.x (expecting a connection timeout) I'm now sometimes
2932 getting "No route to host". Convert this to a timeout.
2934 5. Define ICONV_ARG2_TYPE as "char **" for Unixware7 to avoid compiler
2937 6. Some OS don't have socklen_t but use size_t instead. This affects the
2938 fifth argument of getsockopt() amongst other things. This is now
2939 configurable by a macro called SOCKLEN_T which defaults to socklen_t, but
2940 can be set for individual OS. I have set it for SunOS5, OSF1, and
2941 Unixware7. Current versions of SunOS5 (aka Solaris) do have socklen_t, but
2942 some earlier ones do not.
2944 7. Change 4.30/15 was not doing the test caselessly.
2946 8. The standard form for an IPv6 address literal was being rejected by address
2947 parsing in, for example, MAIL and RCPT commands. An example of this kind of
2948 address is [IPv6:2002:c1ed:8229:10:202:2dff:fe07:a42a]. Exim now accepts
2949 this, as well as the form without the "IPv6" on the front (but only when
2950 address literals are enabled, of course).
2952 9. Added some casts to avoid compiler warnings in OS/os.c-Linux.
2954 10. Exim crashed if a message with an empty sender address specified by -f
2955 encountered a router with an errors_to setting. This could be provoked only
2956 by a command such as
2960 where an empty string was supplied; "<>" did not hit this bug.
2962 11. Installed PCRE release 4.5.
2964 12. If EHLO/HELO was rejected by an ACL, the value of $sender_helo_name
2965 remained set. It is now erased.
2967 13. exiqgrep wasn't working on MacOS X because it didn't correctly compute
2968 times from message ids (which are base 36 rather than the normal 62).
2970 14. "Expected" SMTP protocol errors that can arise when PIPELINING is in use
2971 were being counted as actual protocol errors, and logged if the log
2972 selector +smtp_protocol_error was set. One cannot be perfect in this test,
2973 but now, if PIPELINING has been advertised, RCPT following a rejected MAIL,
2974 and DATA following a set of rejected RCPTs do not count as protocol errors.
2975 In other words, Exim assumes they were pipelined, though this may not
2976 actually be the case. Of course, in all cases the client gets an
2977 appropriate error code.
2979 15. If a lookup fails in an ACL condition, a message about the failure may
2980 be available; it is used if testing the ACL cannot continue, because most
2981 such messages specify what the cause of the deferral is. However, some
2982 messages (e.g. "MYSQL: no data found") do not cause a defer. There was bug
2983 that caused an old message to be retained and used if a later statement
2984 caused a defer, replacing the real cause of the deferral.
2986 16. If an IP address had so many PTR records that the DNS lookup buffer
2987 was not large enough to hold them, Exim could crash while trying to process
2988 the truncated data. It now detects and logs this case.
2990 17. Further to 4.21/58, another change has been made: if (and only if) the
2991 first line of a message (the first header line) ends with CRLF, a bare LF
2992 in a subsequent header line has a space inserted after it, so as not to
2993 terminate the header.
2995 18. Refactoring: tidied an ugly bit of code in appendfile that copied data
2996 unnecessarily, used atoi() instead of strtol(), and didn't check the
2997 termination when getting file sizes from file names by regex.
2999 19. Completely re-implemented the support for maildirsize files, in the light
3000 of a number of problems with the previous contributed implementation
3001 (4.30/29). In particular:
3003 . If the quota is zero, the maildirsize file is maintained, but no quota is
3006 . If the maildir directory does not exist, it is created before any attempt
3007 to write a maildirsize file.
3009 . The quota value in the file is just a cache; if the quota is changed in
3010 the transport, the new value overrides.
3012 . A regular expression is available for excluding directories from the
3015 20. The autoreply transport checks the characters in options that define the
3016 message's headers; it allows continued headers, but it was checking with
3017 isspace() after an embedded newline instead of explicitly looking for a
3020 21. If all the "regular" hosts to which an address was routed had passed their
3021 expiry times, and had not reached their retry times, the address was
3022 bounced, even if fallback hosts were defined. Now Exim should go on to try
3025 22. Increased buffer sizes in the callout code from 1024 to 4096 to match the
3026 equivalent code in the SMTP transport. Some hosts send humungous responses
3027 to HELO/EHLO, more than 1024 it seems.
3029 23. Refactoring: code in filter.c used (void *) for "any old type" but this
3030 gives compiler warnings in some environments. I've now done it "properly",
3033 24. The replacement for inet_ntoa() that is used with gcc on IRIX systems
3034 (because of problems with the built-in one) was declared to return uschar *
3035 instead of char *, causing compiler failure.
3037 25. Fixed a file descriptor leak when processing alias/forward files.
3039 26. Fixed a minor format string issue in dbfn.c.
3041 27. Typo in exim.c: ("dmbnz" for "dbmnz").
3043 28. If a filter file refered to $h_xxx or $message_headers, and the headers
3044 contained RFC 2047 "words", Exim's memory could, under certain conditions,
3047 29. When a sender address is verified, it is cached, to save repeating the test
3048 when there is more than one recipient in a message. However, when the
3049 verification involves a callout, it is possible for different callout
3050 options to be set for different recipients. It is too complicated to keep
3051 track of this in the cache, so now Exim always runs a verification when a
3052 callout is required, relying on the callout cache for the optimization.
3053 The overhead is duplication of the address routing, but this should not be
3056 30. Fixed a bug in callout caching. If a RCPT command caused the sender address
3057 to be verified with callout=postmaster, and the main callout worked but the
3058 postmaster check failed, the verification correctly failed. However, if a
3059 subsequent RCPT command asked for sender verification *without* the
3060 postmaster check, incorrect caching caused this verification also to fail,
3063 31. Exim caches DNS lookup failures so as to avoid multiple timeouts; however,
3064 it was not caching the DNS options (qualify_single, search_parents) that
3065 were used when the lookup failed. A subsequent lookup with different
3066 options therefore always gave the same answer, though there were cases
3067 where it should not have. (Example: a "domains = !$mx_any" option on a
3068 dnslookup router: the "domains" option is always processed without any
3069 widening, but the router might have qualify_single set.) Now Exim uses the
3070 cached value only when the same options are set.
3072 32. Added John Jetmore's "exipick" utility to the distribution.
3074 33. GnuTLS: When an attempt to start a TLS session fails for any reason other
3075 than a timeout (e.g. a certificate is required, and is not provided), an
3076 Exim server now closes the connection immediately. Previously it waited for
3077 the client to close - but if the client is SSL, it seems that they each
3078 wait for each other, leading to a delay before one of them times out.
3080 34: GnuTLS: Updated the code to use the new GnuTLS 1.0.0 API. I have not
3081 maintained 0.8.x compatibility because I don't think many are using it, and
3082 it is clearly obsolete.
3084 35. Added TLS support for CRLs: a tls_crl global option and one for the smtp
3087 36. OpenSSL: $tls_certificate_verified was being set to 1 even if the
3088 client certificate was expired. A simple patch fixes this, though I don't
3089 understand the full logic of why the verify callback is called multiple
3092 37. OpenSSL: a patch from Robert Roselius: "Enable client-bug workaround.
3093 Versions of OpenSSL as of 0.9.6d include a 'CBC countermeasure' feature,
3094 which causes problems with some clients (such as the Certicom SSL Plus
3095 library used by Eudora). This option, SSL_OP_DONT_INSERT_EMPTY_FRAGMENTS,
3096 disables the coutermeasure allowing Eudora to connect."
3098 38. Exim was not checking that a write() to a log file succeeded. This could
3099 lead to Bad Things if a log got too big, in particular if it hit a file
3100 size limit. Exim now panics and dies if it cannot write to a log file, just
3101 as it does if it cannot open a log file.
3103 39. Modified OS/Makefile-Linux so that it now contains
3105 CFLAGS=-O -D_FILE_OFFSET_BITS=64 -D_LARGEFILE_SOURCE
3107 The two -D definitions ensure that Exim is compiled with large file
3108 support, which makes it possible to handle log files that are bigger than
3111 40. Fixed a subtle caching bug: if (in an ACL or a set of routers, for
3112 instance) a domain was checked against a named list that involved a lookup,
3113 causing $domain_data to be set, then another domain was checked against the
3114 same list, then the first domain was re-checked, the value of $domain_data
3115 after the final check could be wrong. In particular, if the second check
3116 failed, it could be set empty. This bug probably also applied to
3119 41. The strip_trailing_dot option was not being applied to the address given
3120 with the -f command-line option.
3122 42. The code for reading a message's header from the spool was incrementing
3123 $received_count, but never initializing it. This meant that the value was
3124 incorrect (doubled) while delivering a message in the same process in which
3125 it was received. In the most common configuration of Exim, this never
3126 happens - a fresh exec is done - but it can happen when
3127 deliver_drop_privilege is set.
3129 43. When Exim logs an SMTP synchronization error - client data sent too soon -
3130 it now includes up to 150 characters of the unexpected data in the log
3133 44. The exim_dbmbuild utility uses fixed size buffers for reading input lines
3134 and building data strings. The size of both of these buffers was 10 000
3135 bytes - far larger than anybody would *ever* want, thought I. Needless to
3136 say, somebody hit the limit. I have increased the maximum line length to
3137 20 000 and the maximum data length of concatenated lines to 100 000. I have
3138 also fixed two bugs, because there was no checking on these buffers. Tsk,
3139 tsk. Now exim_dbmbuild gives a message and exits with an error code if a
3140 buffer is too small.
3142 45. The exim_dbmbuild utility did not support quoted keys, as Exim does in
3143 lsearch lookups. Now it does.
3145 46. When parsing a route_list item in a manualroute router, a fixed-length
3146 buffer was used for the list of hosts. I made this 1024 bytes long,
3147 thinking that nobody would ever have a list of hosts that long. Wrong.
3148 Somebody had a whole pile of complicated expansion conditions, and the
3149 string was silently truncated, leading to an expansion error. It turns out
3150 that it is easier to change to an unlimited length (owing to other changes
3151 that have happened since this code was originally written) than to build
3152 structure for giving a limitation error. The length of the item that
3153 expands into the list of hosts is now unlimited.
3155 47. The lsearch lookup could not handle data where the length of text line was
3156 more than 4095 characters. Such lines were truncated, leading to shortened
3157 data being returned. It should now handle lines of any length.
3159 48. Minor wording revision: "cannot test xxx in yyy ACL" becomes "cannot test
3160 xxx condition in yyy ACL" (e.g. "cannot test domains condition in DATA
3163 49. Cosmetic tidy to scripts like exicyclog that are generated by globally
3164 replacing strings such as BIN_DIRECTORY in a source file: the replacement
3165 no longer happens in comment lines. A list of replacements is now placed
3166 at the head of all of the source files, except those whose only change is
3167 to replace PERL_COMMAND in the very first #! line.
3169 50. Replaced the slow insertion sort in queue.c, for sorting the list of
3170 messages on the queue, with a bottom-up merge sort, using code contributed
3171 by Michael Haardt. This should make operations like -bp somewhat faster on
3172 large queues. It won't affect queue runners, except when queue_run_in_order
3175 51. Installed eximstats 1.31 in the distribution.
3177 52. Added support for SRV lookups to the dnslookup router.
3179 53. If an ACL referred to $message_body or $message_body_end, the value was not
3180 reset for any messages that followed in the same SMTP session.
3182 54. The store-handling optimization for building very long strings was not
3183 differentiating between the different store pools. I don't think this
3184 actually made any difference in practice, but I've tidied it.
3186 55. While running the routers to verify a sender address, $sender_address
3187 was still set to the sender address. This is wrong, because when routing to
3188 send a bounce to the sender, it would be empty. Therefore, I have changed
3189 it so that, while verifying a sender address, $sender_address is set to <>.
3190 (There is no change to what happens when verifying a recipient address.)
3192 56. After finding MX (or SRV) records, Exim was doing a DNS lookup for the
3193 target A or AAAA records (if not already returned) without resetting the
3194 qualify_single or search_parents options of the DNS resolver. These are
3195 inappropriate in this case because the targets of MX and SRV records must
3196 be FQDNs. A broken DNS record could cause trouble if it happened to have a
3197 target that, when qualified, matched something in the local domain. These
3198 two options are now turned off when doing these lookups.
3200 57. It seems that at least some releases of Reiserfs (which does not have the
3201 concept of a fixed number of inodes) returns zero and not -1 for the
3202 number of available inodes. This interacted badly with check_spool_inodes,
3203 which assumed that -1 was the "no such thing" setting. What I have done is
3204 to check that the total number of inodes is greater than zero before doing
3205 the test of how many are available.
3207 58. When a "warn" ACL statement has a log_message modifier, the message is
3208 remembered, and not repeated. This is to avoid a lot of repetition when a
3209 message has many recipients that cause the same warning to be written.
3210 Howewer, Exim was preserving the list of already written lines for an
3211 entire SMTP session, which doesn't seem right. The memory is now reset if a
3212 new message is started.
3214 59. The "rewrite" debugging flag was not showing the result of rewriting in the
3215 debugging output unless log_rewrite was also set.
3217 60. Avoid a compiler warning on 64-bit systems in dsearch.c by avoiding the use
3218 of (int)(handle) when we know that handle contains (void *)(-1).
3220 61. The Exim daemon panic-logs an error return when it closes the incoming
3221 connection. However "connection reset by peer" seems to be common, and
3222 isn't really an error worthy of noting specially, so that particular error
3225 62. When Exim is trying to find all the local interfaces, it used to panic and
3226 die if the ioctl to get the interface flags failed. However, it seems that
3227 on at least one OS (Solaris 9) it is possible to have an interface that is
3228 included in the list of interfaces, but for which you get a failure error
3229 for this call. This happens when the interface is not "plumbed" into a
3230 protocol (i.e. neither IPv4 nor IPv6). I've changed the code so that a
3231 failure of the "get flags" call assumes that the interface is down.
3233 63. Added a ${eval10: operator, which assumes all numbers are decimal. This
3234 makes life easier for people who are doing arithmetic on fields extracted
3235 from dates, where you often get leading zeros that should not be
3236 interpreted as octal.
3238 64. Added qualify_domain to the redirect router, to override the global
3241 65. If a pathologically long header line contained very many addresses (the
3242 report of this problem mentioned 10 000) and each of them was rewritten,
3243 Exim could use up a very large amount of memory. (It kept on making new
3244 copies of the header line as it rewrote, and never released the old ones.)
3245 At the expense of a bit more processing, the header rewriting function has
3246 been changed so that it no longer eats memory in this way.
3248 66. The generation of the Received: header has been moved from the time that a
3249 message starts to be received, to the time that it finishes. The timestamp
3250 in the Received: header should now be very close to that of the <= log
3251 line. There are two side-effects of this change:
3253 (a) If a message is rejected by a DATA or non-SMTP ACL or local_scan(), the
3254 logged header lines no longer include the local Received: line, because
3255 it has not yet been created. The same applies to a copy of the message
3256 that is returned to a non-SMTP sender when a message is rejected.
3258 (b) When a filter file is tested using -bf, no additional Received: header
3259 is added to the test message. After some thought, I decided that this
3262 This change does not affect the value of $received_for. It is still set
3263 after address rewriting, but before local_scan() is called.
3265 67. Installed the latest Cygwin-specific files from the Cygwin maintainer.
3267 68. GnuTLS: If an empty file is specified for tls_verify_certificates, GnuTLS
3268 gave an unhelpful panic error message, and a defer error. I have managed to
3269 change this behaviour so that it now rejects any supplied certificate,
3270 which seems right, as the list of acceptable certificates is empty.
3272 69. OpenSSL: If an empty file is specified for tls_verify_certificates, OpenSSL
3273 gave an unhelpful defer error. I have not managed to make this reject any
3274 supplied certificates, but the error message it gives is "no certificate
3275 supplied", which is not helpful.
3277 70. exigrep's output now also includes lines that are not associated with any
3278 message, but which match the given pattern. Implemented by a patch from
3279 Martin Sluka, which also tidied up the Perl a bit.
3281 71. Recipient callout verification, like sender verification, was using <> in
3282 the MAIL FROM command. This isn't really the right thing, since the actual
3283 sender may affect whether the remote host accepts the recipient or not. I
3284 have changed it to use the actual sender in the callout; this means that
3285 the cache record is now keyed on a recipient/sender pair, not just the
3286 recipient address. There doesn't seem to be a real danger of callout loops,
3287 since a callout by the remote host to check the sender would use <>.
3288 [SEE ABOVE: changed after hitting problems.]
3290 72. Exim treats illegal SMTP error codes that do not begin with 4 or 5 as
3291 temporary errors. However, in the case of such a code being given after
3292 the end of a data transmission (i.e. after ".") Exim was failing to write
3293 a retry record for the message. (Yes, there was some broken host that was
3294 actually sending 8xx at this point.)
3296 73. An unknown lookup type in a host list could cause Exim to panic-die when
3297 the list was checked. (An example that provoked this was putting <; in the
3298 middle of a list instead of at the start.) If this happened during a DATA
3299 ACL check, a -D file could be left lying around. This kind of configuration
3300 error no longer causes Exim to die; instead it causes a defer errror. The
3301 incident is still logged to the main and panic logs.
3303 74. Buglet left over from Exim 3 conversion. The message "too many messages
3304 in one connection" was written to the rejectlog but not the mainlog, except
3305 when address rewriting (yes!) was being logged.
3307 75. Added write_rejectlog option.
3309 76. When a system filter was run not as root (that is, when system_filter_user
3310 was set), the values of the $n variables were not being returned to the
3311 main process; thus, they were not subsequently available in the $sn
3314 77. Added +return_path_on_delivery log selector.
3316 78. A connection timeout was being treated differently from recipients deferred
3317 when testing hosts_max_try with a message that was older than the host's
3318 retry timeout. (The host should not be counted, thus allowing all hosts to
3319 be tried at least once before bouncing.) This may have been the cause of an
3320 occasionally reported bug whereby a message would remain on the queue
3321 longer than the retry timeout, but would be bounced if a delivery was
3322 forced. I say "may" because I never totally pinned down the problem;
3323 setting up timeout/retry tests is difficult. See also the next item.
3325 79. The ultimate address timeout was not being applied to errors that involved
3326 a combination of host plus message (for example, a timeout on a MAIL
3327 command). When an address resolved to a number of possible hosts, and they
3328 were not all tried for each delivery (e.g. because of hosts_max_try), a
3329 message could remain on the queue longer than the retry timeout.
3331 80. Sieve bug: "stop" inside "elsif" was broken. Applied a patch from Michael
3334 81. Fixed an obscure SMTP outgoing bug which required at least the following
3335 conditions: (a) there was another message waiting for the same server;
3336 (b) the server returned 5xx to all RCPT commands in the first message so
3337 that the message was not completed; (c) the server dropped the connection
3338 or gave a negative response to the RSET that Exim sends to abort the
3339 transaction. The observed case was a dropped connection after DATA that had
3340 been sent in pipelining mode. That is, the server had advertised PIPELINING
3341 but was not implementing it correctly. The effect of the bug was incorrect
3342 behaviour, such as trying another host, and this could lead to a crash.
3348 1. The 3rd arguments to getsockname(), getpeername(), and accept() in exim.c
3349 and daemon.c were passed as pointers to ints; they should have been
3350 pointers to socklen_t variables (which are typically unsigned ints).
3352 2. Some signed/unsigned type warnings in the os.c file for Linux have been
3355 3. Fixed a really odd bug that affected only the testing scheme; patching a
3356 certain fixed string in the binary changed the value of another string that
3357 happened to be identical to the end of the original first string.
3359 4. When gethostbyname() (or equivalent) is passed an IP address as a "host
3360 name", it returns that address as the IP address. On some operating
3361 systems (e.g. Solaris), it also passes back the IP address string as the
3362 "host name". However, on others (e.g. Linux), it passes back an empty
3363 string. Exim wasn't checking for this, and was changing the host name to an
3364 empty string, assuming it had been canonicized.
3366 5. Although rare, it is permitted to have more than one PTR record for a given
3367 IP address. I thought that gethostbyaddr() or getipnodebyaddr() always gave
3368 all the names associated with an address, because they do in Solaris.
3369 However, it seems that they do not in Linux for data that comes from the
3370 DNS. If an address in /etc/hosts has multiple names, they _are_ all given.
3371 I found this out when I moved to a new Linux workstation and tried to run
3372 the Exim test suite.
3374 To get round this problem I have changed the code so that it now does its
3375 own call to the DNS to look up PTR records when searching for a host name.
3376 If nothing can be found in the DNS, it tries gethostbyaddr(), so that
3377 addresses that are only in /etc/hosts are still found.
3379 This behaviour is, however, controlled by an option called host_lookup_
3380 order, which defaults to "bydns:byaddr". If people want to use the other
3381 order, or indeed, just use one or the other means of lookup, they can
3382 specify it in this variable.
3384 6. If a PTR record yields an empty name, Exim treats it as non-existent. In
3385 some operating systems, this comes back from gethostbyaddr() as an empty
3386 string, and this is what Exim used to test for. However, it seems that in
3387 other systems, "." is yielded. Exim now tests for this case too.
3389 7. The values of check_spool_space and check_log_space are now held internally
3390 as a number of kilobytes instead of an absolute number of bytes. If a
3391 numbers is specified without 'K' or 'M', it is rounded up to the nearest
3392 kilobyte. This means that much larger values can be stored.
3394 8. Exim monitor: an attempt to get the action menu when not actually pointing
3395 at a message produces an empty menu entitled "No message selected". This
3396 works on Solaris (OpenWindows). However, XFree86 does not like a menu with
3397 no entries in it ("Shell widget menu has zero width and/or height"). So I
3398 have added a single, blank menu entry in this case.
3400 9. Added ${quote_local_part.
3402 10. MIME decoding is now applied to the contents of Subject: header lines when
3405 11. Now that a reference to $sender_host_address automatically causes a reverse
3406 lookup to occur if necessary (4.13/18), there is no need to arrange for a
3407 host lookup before query-style lookups in lists that might use this
3408 variable. This has therefore been abolished, and the "net-" prefix is no
3409 longer necessary for query-style lookups.
3411 12. The Makefile for SCO_SV contained a setting of LDFLAGS. This appears to
3412 have been a typo for LFLAGS, so it has been changed.
3414 13. The install script calls Exim with "-C /dev/null" in order to find the
3415 version number. If ALT_CONFIG_PREFIX was set, this caused an error message
3416 to be output. Howeve, since Exim outputs its version number before the
3417 error, it didn't break the script. It just looked ugly. I fixed this by
3418 always allowing "-C /dev/null" if the caller is root.
3420 14. Ignore overlarge ACL variable number when reading spool file - insurance
3421 against a later release with more variables having written the file.
3423 15. The standard form for an IPv6 address literal was being rejected by EHLO.
3424 Example: [IPv6:2002:c1ed:8229:10:202:2dff:fe07:a42a]. Exim now accepts
3425 this, as well as the form without the "IPv6" on the front.
3427 16. Added CHOWN_COMMAND=/usr/sbin/chown and LIBS=-lresolv to the
3428 OS/Makefile-Darwin file.
3430 17. Fixed typo in lookups/ldap.c: D_LOOKUP should be D_lookup. This applied
3431 only to LDAP libraries that do not have LDAP_OPT_DEREF.
3433 18. After change 4.21/52, "%ld" was used to format the contents of the $inode
3434 variable. However, some OS use ints for inodes. I've added cast to long int
3435 to get rid of the compiler warning.
3437 19. I had forgotten to lock out "/../" in configuration file names when
3438 ALT_CONFIG_PREFIX was set.
3440 20. Routers used for verification do not need to specify transports. However,
3441 if such a router generated a host list, and callout was configured, Exim
3442 crashed, because it could not find a port number from the (non-existent)
3443 transport. It now assumes port 25 in this circumstance.
3445 21. Added the -t option to exigrep.
3447 22. If LOOKUP_LSEARCH is defined, all three linear search methods (lsearch,
3448 wildlsearch, nwildlsearch) are compiled. LOOKUP_WILDLSEARCH and LOOKUP_
3449 NWILDLSEARCH are now obsolete, but retained for compatibility. If either of
3450 them is set, LOOKUP_LSEARCH is forced.
3452 23. "exim -bV" now outputs a list of lookups that are included in the binary.
3454 24. Added sender and host information to the "rejected by local_scan()" log
3455 line; previously there was no indication of these.
3457 25. Added .include_if_exists.
3459 26. Change 3.952/11 added an explicit directory sync on top of a file sync for
3460 Linux. It turns out that not all file systems support this. Apparently some
3461 versions of NFS do not. (It's rare to put Exim's spool on NFS, but people
3462 do it.) To cope with this, the error EINVAL, which means that sync-ing is
3463 not supported on the file descriptor, is now ignored when Exim is trying to
3464 sync a directory. This applies only to Linux.
3466 27. Added -DBIND_8_COMPAT to the CLFAGS setting for Darwin.
3468 28. In Darwin (MacOS X), the PAM headers are in /usr/include/pam and not in
3469 /usr/include/security. There's now a flag in OS/os.h-Darwin to cope with
3472 29. Added support for maildirsize files from supplied patch (modified a bit).
3474 30. The use of :fail: followed by an empty string could lead Exim to respond to
3475 sender verification failures with (e.g.):
3477 550 Verification failed for <xxx>
3478 550 Sender verify failed
3480 where the first response line was missing the '-' that indicates it is not
3481 the final line of the response.
3483 31. The loop for finding the name of the user that called Exim had a hardwired
3484 limit of 10; it now uses the value of finduser_retries, which is used for
3485 all other user lookups.
3487 32. Added $received_count variable, available in data and not_smtp ACLs, and at
3490 33. Exim was neglecting to zero errno before one call of strtol() when
3491 expanding a string and expecting an integer value. On some systems this
3492 resulted in spurious "integer overflow" errors. Also, it was casting the
3493 result into an int without checking.
3495 34. Testing for a connection timeout using "timeout_connect" in the retry rules
3496 did not work. The code looks as if it has *never* worked, though it appears
3497 to have been documented since at least releast 1.62. I have made it work.
3499 35. The "timeout_DNS" error in retry rules, also documented since at least
3500 1.62, also never worked. As it isn't clear exactly what this means, and
3501 clearly it isn't a major issue, I have abolished the feature by treating it
3502 as "timeout", and writing a warning to the main and panic logs.
3504 36. The display of retry rules for -brt wasn't always showing the error code
3507 37. Added new error conditions to retry rules: timeout_A, timeout_MX,
3508 timeout_connect_A, timeout_connect_MX.
3510 38. Rewriting the envelope sender at SMTP time did not allow it to be rewritten
3511 to the empty sender.
3513 39. The daemon was not analysing the content of -oX till after it had closed
3514 stderr and disconnected from the controlling terminal. This meant that any
3515 syntax errors were only noted on the panic log, and the return code from
3516 the command was 0. By re-arranging the code a little, I've made the
3517 decoding happen first, so such errors now appear on stderr, and the return
3518 code is 1. However, the actual setting up of the sockets still happens in
3519 the disconnected process, so errors there are still only recorded on the
3522 40. A daemon listener on a wildcard IPv6 socket that also accepts IPv4
3523 connections (as happens on some IP stacks) was logged at start up time as
3524 just listening for IPv6. It now logs "IPv6 with IPv4". This differentiates
3525 it from "IPv6 and IPv4", which means that two separate sockets are being
3528 41. The debug output for gethostbyname2() or getipnodebyname() failures now
3529 says whether AF_INET or AF_INET6 was passed as an argument.
3531 42. Exiwhat output was messed up when time zones were included in log
3534 43. Exiwhat now gives more information about the daemon's listening ports,
3535 and whether -tls-on-connect was used.
3537 44. The "port" option of the smtp transport is now expanded.
3539 45. A "message" modifier in a "warn" statement in a non-message ACL was being
3540 silently ignored. Now an error message is written to the main and panic
3543 46. There's a new ACL modifier called "logwrite" which writes to a log file
3544 as soon as it is encountered.
3546 47. Added $local_user_uid and $local_user_gid at routing time.
3548 48. Exim crashed when trying to verify a sender address that was being
3551 49. Exim was recognizing only a space character after ".include". It now also
3552 recognizes a tab character.
3554 50. Fixed several bugs in the Perl script that creates the exim.8 man page by
3555 extracting the relevant information from the specification. The man page no
3556 longer contains scrambled data for the -d option, and I've added a section
3557 at the front about calling Exim under different names.
3559 51. Added "extra_headers" argument to the "mail" command in filter files.
3561 52. Redirecting mail to an unqualified address in a Sieve filter caused Exim to
3564 53. Installed eximstats 1.29.
3566 54. Added transport_filter_timeout as a generic transport option.
3568 55. Exim no longer adds an empty Bcc: header to messages that have no To: or
3569 Cc: header lines. This was required by RFC 822, but it not required by RFC
3572 56. Exim used to add From:, Date:, and Message-Id: header lines to any
3573 incoming messages that did not have them. Now it does so only if the
3574 message originates locally, that is, if there is no associated remote host
3575 address. When Resent- header lines are present, this applies to the Resent-
3576 lines rather than the non-Resent- lines.
3578 57. Drop incoming SMTP connection after too many syntax or protocol errors. The
3579 limit is controlled by smtp_max_synprot_errors, defaulting to 3.
3581 58. Messages for configuration errors now include the name of the main
3582 configuration file - useful now that there may be more than one file in a
3583 list (.included file names were always shown).
3585 59. Change 4.21/82 (run initgroups() when starting the daemon) causes problems
3586 for those rare installations that do not start the daemon as root or run it
3587 setuid root. I've cut out the call to initgroups() if the daemon is not
3590 60. The Exim user and group can now be bound into the binary as text strings
3591 that are looked up at the start of Exim's processing.
3593 61. Applied a small patch for the Interbase code, supplied by Ard Biesheuvel.
3595 62. Added $mailstore_basename variable.
3597 63. Installed patch to sieve.c from Michael Haardt.
3599 64. When Exim failed to open the panic log after failing to open the main log,
3600 the original message it was trying to log was written to stderr and debug
3601 output, but if they were not available (the usual case in production), it
3602 was lost. Now it is written to syslog before the two lines that record the
3603 failures to open the logs.
3605 65. Users' Exim filters run in subprocesses under the user's uid. It is
3606 possible for a "deliver" command or an alias in a "personal" command to
3607 provoke an address rewrite. If logging of address rewriting is configured,
3608 this fails because the process is not running as root or exim. There may be
3609 a better way of dealing with this, but for the moment (because 4.30 needs
3610 to be released), I have disabled address rewrite logging when running a
3611 filter in a non-root, non-exim process.
3617 1. The buildconfig auxiliary program wasn't quoting the value set for
3618 HEADERS_CHARSET. This caused a compilation error complaining that 'ISO' was
3619 not defined. This bug was masked in 4.22 by the effect that was fixed in
3622 2. Some messages that were rejected after a message id was allocated were
3623 shown as "incomplete" by exigrep. It no longer does this for messages that
3624 are rejected by local_scan() or the DATA or non-SMTP ACLs.
3626 3. If a Message-ID: header used a domain literal in the ID, and Exim did not
3627 have allow_domain_literals set, the ID did not get logged in the <= line.
3628 Domain literals are now always recognized in Message-ID: header lines.
3630 4. The first argument for a ${extract expansion item is the key name or field
3631 number. Leading and trailing spaces in this item were not being ignored,
3632 causing some misleading effects.
3634 5. When deliver_drop_privilege was set, single queue runner processes started
3635 manually (i.e. by the command "exim -q") or by the daemon (which uses the
3636 same command in the process it spins off) were not dropping privilege.
3638 6. When the daemon running as "exim" started a queue runner, it always
3639 re-executed Exim in the spun-off process. This is a waste of effort when
3640 deliver_drop_privilege is set. The new process now just calls the
3641 queue-runner function directly.
3647 1. Typo in the src/EDITME file: it referred to HEADERS_DECODE_TO instead of
3650 2. Change 4.21/73 introduced a bug. The pid file path set by -oP was being
3651 ignored. Though the use of -oP was forcing the writing of a pid file, it
3652 was always written to the default place.
3654 3. If the message "no IP address found for host xxxx" is generated during
3655 incoming verification, it is now followed by identification of the incoming
3656 connection (so you can more easily find what provoked it).
3658 4. Bug fix for Sieve filters: "stop" inside a block was not working properly.
3660 5. Added some features to "harden" Exim a bit more against certain attacks:
3662 (a) There is now a build-time option called FIXED_NEVER_USERS that can
3663 be put in Local/Makefile. This is like the never_users runtime option,
3664 but it cannot be overridden. The default setting is "root".
3666 (b) If ALT_CONFIG_PREFIX is defined in Local/Makefile, it specifies a
3667 prefix string with which any file named in a -C command line option
3670 (c) If ALT_CONFIG_ROOT_ONLY is defined in Local/Makefile, root privilege
3671 is retained for -C and -D only if the caller of Exim is root. Without
3672 it, the exim user may also use -C and -D and retain privilege.
3674 (d) If DISABLE_D_OPTION is defined in Local/Makefile, the use of the -D
3675 command line option is disabled.
3677 6. Macro names set by the -D option must start with an upper case letter, just
3678 like macro names defined in the configuration file.
3680 7. Added "dereference=" facility to LDAP.
3682 8. Two instances of the typo "uknown" in the source files are fixed.
3684 9. If a PERL_COMMAND setting in Local/Makefile was not at the start of a line,
3685 the Configure-Makefile script screwed up while processing it.
3687 10. Incorporated PCRE 4.4.
3689 11. The SMTP synchronization check was not operating right at the start of an
3690 SMTP session. For example, it could not catch a HELO sent before the client
3691 waited for the greeting. There is now a check for outstanding input at the
3692 point when the greeting is written. Because of the duplex, asynchronous
3693 nature of TCP/IP, it cannot be perfect - the incorrect input may be on its
3694 way, but not yet received, when the check is performed.
3696 12. Added tcp_nodelay to make it possible to turn of the setting of TCP_NODELAY
3697 on TCP/IP sockets, because this apparently causes some broken clients to
3700 13. Installed revised OS/Makefile-CYGWIN and OS/os.c-cygwin (the .h file was
3701 unchanged) from the Cygwin maintainer.
3703 14. The code for -bV that shows what is in the binary showed "mbx" when maildir
3704 was supported instead of testing for mbx. Effectively a typo.
3706 15. The spa authenticator server code was not checking that the input it
3707 received was valid base64.
3709 16. The debug output line for the "set" modifier in ACLs was not showing the
3710 name of the variable that was being set.
3712 17. Code tidy: the variable type "vtype_string" was never used. Removed it.
3714 18. Previously, a reference to $sender_host_name did not cause a DNS reverse
3715 lookup on its own. Something else was needed to trigger the lookup. For
3716 example, a match in host_lookup or the need for a host name in a host list.
3717 Now, if $sender_host_name is referenced and the host name has not yet been
3718 looked up, a lookup is performed. If the lookup fails, the variable remains
3719 empty, and $host_lookup_failed is set to "1".
3721 19. Added "eqi" as a case-independent comparison operator.
3723 20. The saslauthd authentication condition could segfault if neither service
3724 nor realm was specified.
3726 21. If an overflowing value such as "2048M" was set for message_size_limit, the
3727 error message that was logged was misleading, and incoming SMTP
3728 connections were dropped. The message is now more accurate, and temporary
3729 errors are given to SMTP connections.
3731 22. In some error situations (such as 21 above) Exim rejects all SMTP commands
3732 (except RSET) with a 421 error, until QUIT is received. However, it was
3733 failing to send a response to QUIT.
3735 23. The HELO ACL was being run before the code for helo_try_verify_hosts,
3736 which made it impossible to use "verify = helo" in the HELO ACL. The HELO
3737 ACL is now run after the helo_try_verify_hosts code.
3739 24. "{MD5}" and "{SHA1}" are now recognized as equivalent to "{md5"} and
3740 "{sha1}" in the "crypteq" expansion condition (in fact the comparison is
3741 case-independent, so other case variants are also recognized). Apparently
3742 some systems use these upper case variants.
3744 25. If more than two messages were waiting for the same host, and a transport
3745 filter was specified for the transport, Exim sent two messages over the
3746 same TCP/IP connection, and then failed with "socket operation on non-
3747 socket" when it tried to send the third.
3749 26. Added Exim::debug_write and Exim::log_write for embedded Perl use.
3751 27. The extern definition of crypt16() in expand.c was not being excluded when
3752 the OS had its own crypt16() function.
3754 28. Added bounce_return_body as a new option, and bounce_return_size_limit
3755 as a preferred synonym for return_size_limit, both as an option and as an
3758 29. Added LIBS=-liconv to OS/Makefile-OSF1.
3760 30. Changed the default configuration ACL to relax the local part checking rule
3761 for addresses that are not in any local domains. For these addresses,
3762 slashes and pipe symbols are allowed within local parts, but the sequence
3763 /../ is explicitly forbidden.
3765 31. SPA server authentication was not clearing the challenge buffer before
3768 32. log_message in a "warn" ACL statement was writing to the reject log as
3769 well as to the main log, which contradicts the documentation and doesn't
3770 seem right (because no rejection is happening). So I have stopped it.
3772 33. Added Ard Biesheuvel's lookup code for accessing an Interbase database.
3773 However, I am unable to do any testing of this.
3775 34. Fixed an infelicity in the appendfile transport. When checking directories
3776 for a mailbox, to see if any needed to be created, it was accidentally
3777 using path names with one or more superfluous leading slashes; tracing
3778 would show up entries such as stat("///home/ph10", 0xFFBEEA48).
3780 35. If log_message is set on a "discard" verb in a MAIL or RCPT ACL, its
3781 contents are added to the log line that is written for every discarded
3782 recipient. (Previously a log_message setting was ignored.)
3784 36. The ${quote: operator now quotes the string if it is empty.
3786 37. The install script runs exim in order to find its version number. If for
3787 some reason other than non-existence or emptiness, which it checks, it
3788 could not run './exim', it was installing it with an empty version number,
3789 i.e. as "exim-". This error state is now caught, and the installation is
3792 38. An argument was missing from the function that creates an error message
3793 when Exim fails to connect to the socket for saslauthd authentication.
3794 This could cause Exim to crash, or give a corrupted message.
3796 39. Added isip, isip4, and isip6 to ${if conditions.
3798 40. The ACL variables $acl_xx are now saved with the message, and can be
3799 accessed later in routers, transports, and filters.
3801 41. The new lookup type nwildlsearch is like wildlsearch, except that the key
3802 strings in the file are not string-expanded.
3804 42. If a MAIL command specified a SIZE value that was too large to fit into an
3805 int variable, the check against message_size_limit failed. Such values are
3806 now forced to INT_MAX, which is around 2Gb for a 32-bit variable. Maybe one
3807 day this will have to be increased, but I don't think I want to be around
3808 when emails are that large.
3815 1. Removed HAVE_ICONV=yes from OS/Makefile-FreeBSD, since it seems that
3816 iconv() is not standard in FreeBSD.
3818 2. Change 4.21/17 was buggy and could cause stack overwriting on a system with
3819 IPv6 enabled. The observed symptom was a segmentation fault on return from
3820 the function os_common_find_running_interfaces() in src/os.c.
3822 3. In the check_special_case() function in daemon.c I had used "errno" as an
3823 argument name, which causes warnings on some systems. This was basically a
3824 typo, since it was named "eno" in the comments!
3826 4. The code that waits for the clock to tick (at a resolution of some fraction
3827 of a second) so as to ensure message-id uniqueness was always waiting for
3828 at least one whole tick, when it could have waited for less. [This is
3829 almost certainly not relevant at current processor speeds, where it is
3830 unlikely to ever wait at all. But we try to future-proof.]
3832 5. The function that sleeps for a time interval that includes fractions of a
3833 second contained a race. It did not block SIGALRM between setting the
3834 timer, and suspending (a couple of lines later). If the interval was short
3835 and the sigsuspend() was delayed until after it had expired, the suspension
3836 never ended. On busy systems this could lead to processes getting stuck for
3839 6. Some uncommon configurations may cause a lookup to happen in a queue runner
3840 process, before it forks any delivery processes. The open lookup caching
3841 mechanism meant that the open file or database connection was passed into
3842 the delivery process. The problem was that delivery processes always tidy
3843 up cached lookup data. This could cause a problem for the next delivery
3844 process started by the queue runner, because the external queue runner
3845 process does not know about the closure. So the next delivery process
3846 still has data in the lookup cache. In the case of a file lookup, there was
3847 no problem because closing a file descriptor in a subprocess doesn't affect
3848 the parent. However, if the lookup was caching a connection to a database,
3849 the connection was closed, and the second delivery process was likely to
3850 see errors such as "PGSQL: query failed: server closed the connection
3851 unexpectedly". The problem has been fixed by closing all cached lookups
3852 in a queue runner before running a delivery process.
3854 7. Compiler warning on Linux for the second argument of iconv(), which doesn't
3855 seem to have the "const" qualifier which it has on other OS. I've
3858 8. Change 4.21/2 was too strict. It is only if there are two authenticators
3859 *of the same type* (client or server) with the same public name that an
3860 error should be diagnosed.
3862 9. When Exim looked up a host name for an IP address, but failed to find the
3863 original IP address when looking up the host name (a safety check), it
3864 output the message "<ip address> does not match any IP for NULL", which was
3865 confusing, to say the least. The bug was that the host name should have
3866 appeared instead of "NULL".
3868 10. Since release 3.03, if Exim is called by a uid other than root or the Exim
3869 user that is built into the binary, and the -C or -D options is used, root
3870 privilege is dropped before the configuration file is read. In addition,
3871 logging is switched to stderr instead of the normal log files. If the
3872 configuration then re-defines the Exim user, the unprivileged environment
3873 is probably not what is expected, so Exim logs a panic warning message (but
3876 However, if deliver_drop_privilege is set, the unprivileged state may well
3877 be exactly what is intended, so the warning has been cut out in that case,
3878 and Exim is allowed to try to write to its normal log files.
3884 1. smtp_return_error_details was not giving details for temporary sender
3885 or receiver verification errors.
3887 2. Diagnose a configuration error if two authenticators have the same public
3890 3. Exim used not to create the message log file for a message until the first
3891 delivery attempt. This could be confusing when incoming messages were held
3892 for policy or load reasons. The message log file is now created at the time
3893 the message is received, and an initial "Received" line is written to it.
3895 4. The automatically generated man page for command line options had a minor
3896 bug that caused no ill effects; however, a more serious problem was that
3897 the procedure for building the man page automatically didn't always
3898 operate. Consequently, release 4.20 contains an out-of-date version. This
3899 shouldn't happen again.
3901 5. When building Exim with embedded Perl support, the script that builds the
3902 Makefile was calling 'perl' to find its compile-time parameters, ignoring
3903 any setting of PERL_COMMAND in Local/Makefile. This is now fixed.
3905 6. The freeze_tell option was not being used for messages that were frozen on
3906 arrival, either by an ACL or by local_scan().
3908 7. Added the smtp_incomplete_transaction log selector.
3910 8. After STARTTLS, Exim was not forgetting that it had advertised AUTH, so it
3911 was accepting AUTH without a new EHLO.
3913 9. Added tls_remember_esmtp to cope with YAEB. This allows AUTH and other
3914 ESMTP extensions after STARTTLS without a new EHLO, in contravention of the
3917 10. Logging of TCP/IP connections (when configured) now happens in the main
3918 daemon process instead of the child process, so that the TCP/IP connection
3919 count is more accurate (but it can never be perfect).
3921 11. The use of "drop" in a nested ACL was not being handled correctly in the
3922 outer ACL. Now, if condition failure induced by the nested "drop" causes
3923 the outer ACL verb to deny access ("accept" or "discard" after "endpass",
3924 or "require"), the connection is dropped.
3926 12. Similarly, "discard" in a nested ACL wasn't being handled. A nested ACL
3927 that yield "discard" can now be used with an "accept" or a "discard" verb,
3928 but an error is generated for any others (because I can't see a useful way
3929 to define what should happen).
3931 13. When an ACL is read dynamically from a file (or anywhere else), the lines
3932 are now processed in the same way as lines in the Exim configuration file.
3933 In particular, continuation lines are supported.
3935 14. Added the "dnslists = a.b.c!=n.n.n.n" feature.
3937 15. Added -ti meaning -t -i.
3939 16. Check for letters, digits, hyphens, and dots in the names of dnslist
3940 domains, and warn by logging if others are found.
3942 17. At least on BSD, alignment is not guarenteed for the array of ifreq's
3943 returned from GIFCONF when Exim is trying to find the list of interfaces on
3944 a host. The code in os.c has been modified to copy each ifreq to an aligned
3945 structure in all cases.
3947 Also, in some cases, the returned ifreq's were being copied to a 'struct
3948 ifreq' on the stack, which was subsequently passed to host_ntoa(). That
3949 means the last couple of bytes of an IPv6 address could be chopped if the
3950 ifreq contained only a normal sockaddr (14 bytes storage).
3952 18. Named domain lists were not supported in the hosts_treat_as_local option.
3953 An entry such as +xxxx was not recognized, and was treated as a literal
3956 19. Ensure that header lines added by a DATA ACL are included in the reject log
3957 if the ACL subsequently rejects the message.
3959 20. Upgrade the cramtest.pl utility script to use Digest::MD5 instead of just
3960 MD5 (which is deprecated).
3962 21. When testing a filter file using -bf, Exim was writing a message when it
3963 took the sender from a "From " line in the message, but it was not doing so
3964 when it took $return_path from a Return-Path: header line. It now does.
3966 22. If the contents of a "message" modifier for a "warn" ACL verb do not begin
3967 with a valid header line field name (a series of printing characters
3968 terminated by a colon, Exim now inserts X-ACL-Warn: at the beginning.
3970 23. Changed "disc" in the source to "disk" to conform to the documentation and
3971 the book and for uniformity.
3973 24. Ignore Sendmail's -Ooption=value command line item.
3975 25. When execve() failed while trying to run a command in a pipe transport,
3976 Exim was returning EX_UNAVAILBLE (69) from the subprocess. However, this
3977 could be confused with a return value of 69 from the command itself. This
3978 has been changed to 127, the value the shell returns if it is asked to run
3979 a non-existent command. The wording for the related log line suggests a
3980 non-existent command as the problem.
3982 26. If received_header_text expands to an empty string, do not add a Received:
3983 header line to the message. (Well, it adds a token one on the spool, but
3984 marks it "old" so that it doesn't get used or transmitted.)
3986 27. Installed eximstats 1.28 (addition of -nt option).
3988 28. There was no check for failure on the call to getsockname() in the daemon
3989 code. This can fail if there is a shortage of resources on the system, with
3990 ENOMEM, for example. A temporary error is now given on failure.
3992 29. Contrary to the C standard, it seems that in some environments, the
3993 equivalent of setlocale(LC_ALL, "C") is not obeyed at the start of a C
3994 program. Exim now does this explicitly; it affects the formatting of
3995 timestamps using strftime().
3997 30. If exiqsumm was given junk data, it threw up some uninitialized variable
3998 complaints. I've now initialized all the variables, to avoid this.
4000 32. Header lines added by a system filter were not being "seen" during
4001 transport-time rewrites.
4003 33. The info_callback() function passed to OpenSSL is set up with type void
4004 (*)(SSL *, int, int), as described somewhere. However, when calling the
4005 function (actually a macro) that sets it up, the type void(*)() is
4006 expected. I've put in a cast to prevent warnings from picky compilers.
4008 34. If a DNS black list lookup found a CNAME record, but there were no A
4009 records associated with the domain it pointed at, Exim crashed.
4011 35. If a DNS black list lookup returned more than one A record, Exim ignored
4012 all but the first. It now scans all returned addresses if a particular IP
4013 value is being sought. In this situation, the contents of the
4014 $dnslist_value variable are a list of all the addresses, separated by a
4017 36. Tightened up the rules for host name lookups using reverse DNS. Exim used
4018 to accept a host name and all its aliases if the forward lookup for any of
4019 them yielded the IP address of the incoming connection. Now it accepts only
4020 those names whose forward lookup yields the correct IP address. Any other
4021 names are discarded. This closes a loophole whereby a rogue DNS
4022 administrator could create reverse DNS records to break through a
4023 wildcarded host restriction in an ACL.
4025 37. If a user filter or a system filter that ran in a subprocess used any of
4026 the numerical variables ($1, $2 etc), or $thisaddress, in a pipe command,
4027 the wrong values were passed to the pipe command ($thisaddress had the
4028 value of $0, $0 had the value of $1, etc). This bug was introduced by
4029 change 4.11/101, and not discovered because I wrote an inadequate test. :-(
4031 38. Improved the line breaking for long SMTP error messages from ACLs.
4032 Previously, if there was no break point between 40 and 75 characters, Exim
4033 left the rest of the message alone. Two changes have been made: (a) I've
4034 reduced the minimum length to 35 characters; (b) if it can't find a break
4035 point between 35 and 75 characters, it looks ahead and uses the first one
4036 that it finds. This may give the occasional overlong line, but at least the
4037 remaining text gets split now.
4039 39. Change 82 of 4.11 was unimaginative. It assumed the limit on the number of
4040 file descriptors might be low, and that setting 1000 would always raise it.
4041 It turns out that in some environments, the limit is already over 1000 and
4042 that lowering it causes trouble. So now Exim takes care not to decrease it.
4044 40. When delivering a message, the value of $return_path is set to $sender_
4045 address at the start of routing (routers may change the value). By an
4046 oversight, this default was not being set up when an address was tested by
4047 -bt or -bv, which affected the outcome if any router or filter referred to
4050 41. The idea of the "warn" ACL verb is that it adds a header or writes to the
4051 log only when "message" or "log_message" are set. However, if one of the
4052 conditions was an address verification, or a call to a nested ACL, the
4053 messages generated by the underlying test were being passed through. This
4054 no longer happens. The underlying message is available in $acl_verify_
4055 message for both "message" and "log_message" expansions, so it can be
4056 passed through if needed.
4058 42. Added RFC 2047 interpretation of header lines for $h_ expansions, with a
4059 new expansion $bh_ to give the encoded byte string without charset
4060 translation. Translation happens only if iconv() is available; HAVE_ICONV
4061 indicates this at build time. HEADERS_CHARSET gives the charset to
4062 translate to; headers_charset can change it in the configuration, and
4063 "headers charset" can change it in an individual filter file.
4065 43. Now that we have a default RFC 2047 charset (see above), the code in Exim
4066 that creates RFC 2047 encoded "words" labels them as that charset instead
4067 of always using iso-8859-1. The cases are (i) the explicit ${rfc2047:
4068 expansion operator; (ii) when Exim creates a From: line for a local
4069 message; (iii) when a header line is rewritten to include a "phrase" part.
4071 44. Nasty bug in exiqsumm: the regex to skip already-delivered addresses was
4072 buggy, causing it to skip the first lines of messages whose message ID
4073 ended in 'D'. This would not have bitten before Exim release 4.14, because
4074 message IDs were unlikely to end in 'D' before then. The effect was to have
4075 incorrect size information for certain domains.
4077 45. #include "config.h" was missing at the start of the crypt16.c module. This
4078 caused trouble on Tru64 (aka OSF1) systems, because HAVE_CRYPT16 was not
4081 46. If there was a timeout during a "random" callout check, Exim treated it as
4082 a failure of the random address, and carried on sending RSET and the real
4083 address. If the delay was just some slowness somewhere, the response to the
4084 original RCPT would be taken as a response to RSET and so on, causing
4085 mayhem of various kinds.
4087 47. Change 50 for 4.20 was a heap of junk. I don't know what I was thinking
4088 when I implemented it. It didn't allow for the fact that some option values
4089 may legitimatetly be negative (e.g. size_addition), and it didn't even do
4090 the right test for positive values.
4092 48. Domain names in DNS records are case-independent. Exim always looks them up
4093 in lower case. Some resolvers return domain names in exactly the case they
4094 appear in the zone file, that is, they may contain uppercase letters. Not
4095 all resolvers do this - some return always lower case. Exim was treating a
4096 change of case by a resolver as a change of domain, similar to a widening
4097 of a domain abbreviation. This triggered its re-routing code and so it was
4098 trying to route what was effectively the same domain again. This normally
4099 caused routing to fail (because the router wouldn't handle the domain
4100 twice). Now Exim checks for this case specially, and just changes the
4101 casing of the domain that it ultimately uses when it transmits the message
4104 49. Added Sieve (RFC 3028) support, courtesy of Michael Haardt's contributed
4107 50. If a filter generated a file delivery with a non-absolute name (possible if
4108 no home directory exists for the router), the forbid_file option was not
4111 51. Added '&' feature to dnslists, to provide bit mask matching in addition to
4112 the existing equality matching.
4114 52. Exim was using ints instead of ino_t variables in some places where it was
4115 dealing with inode numbers.
4117 53. If TMPDIR is defined in Local/Makefile (default in src/EDITME is
4118 TMPDIR="/tmp"), Exim checks for the presence of an environment variable
4119 called TMPDIR, and if it finds it is different, it changes its value.
4121 54. The smtp_printf() function is now made available to local_scan() so
4122 additional output lines can be written before returning. There is also an
4123 smtp_fflush() function to enable the detection of a dropped connection.
4124 The variables smtp_input and smtp_batched_input are exported to
4127 55. Changed the default runtime configuration: the message "Unknown user"
4128 has been removed from the ACL, and instead placed on the localuser router,
4129 using the cannot_route_message feature. This means that any verification
4130 failures that generate their own messages won't get overridden. Similarly,
4131 the "Unrouteable address" message that was in the ACL for unverifiable
4132 relay addresses has also been removed.
4134 56. Added hosts_avoid_esmtp to the smtp transport.
4136 57. The exicyclog script was not checking for the esoteric option
4137 CONFIGURE_FILE_USE_EUID in the Local/Makefile. It now does this, but it
4138 will work only if exicyclog is run under the appropriate euid.
4140 58. Following a discussion on the list, the rules by which Exim recognises line
4141 endings on incoming messages have been changed. The -dropcr and drop_cr
4142 options are now no-ops, retained only for backwards compatibility. The
4143 following line terminators are recognized: LF CRLF CR. However, special
4144 processing applies to CR:
4146 (i) The sequence CR . CR does *not* terminate an incoming SMTP message,
4147 nor a local message in the state where . is a terminator.
4149 (ii) If a bare CR is encountered in a header line, an extra space is added
4150 after the line terminator so as not to end the header. The reasoning
4151 behind this is that bare CRs in header lines are most likely either
4152 to be mistakes, or people trying to play silly games.
4154 59. The size of a message, as listed by "-bp" or in the Exim monitor window,
4155 was being incorrectly given as 18 bytes larger than it should have been.
4156 This is a VOB (very old bug).
4158 60. This may never have affected anything current, but just in case it has:
4159 When the local host is found other than at the start of a list of hosts,
4160 the local host, those with the same MX, and any that follow, are discarded.
4161 When the list in question was part of a longer list of hosts, the following
4162 hosts (not currently being processed) were also being discarded. This no
4163 longer happens. I'm not sure if this situation could ever has previously
4166 61. Added the "/MX" feature to lists of hosts in the manualroute and query
4169 62. Whenever Exim generates a new message, it now adds an Auto-Submitted:
4170 header. This is something that is recommended in a new Internet Draft, and
4171 is something that is documented as being done by Sendmail. There are two
4172 possible values. For messages generated by the autoreply transport, Exim
4175 Auto-Submitted: auto-replied
4177 whereas for all other generated messages (e.g. bounces) it adds
4179 Auto-Submitted: auto-generated
4181 63. The "personal" condition in filters now includes a test for the
4182 Auto-Submitted: header. If it contains the string "auto-" the message it
4183 not considered personal.
4185 64. Added rcpt_include_affixes as a generic transport option.
4187 65. Added queue_only_override (default true).
4189 66. Added the syslog_duplication option.
4191 67. If what should have been the first header line of a message consisted of
4192 a space followed by a colon, Exim was mis-interpreting it as a header line.
4193 It isn't of course - it is syntactically invalid and should therefore be
4194 treated as the start of the message body. The misbehaviour could have
4195 caused a number of strange effects, including loss of data in subsequent
4196 header lines, and spool format errors.
4198 68. Formerly, the AUTH parameter on a MAIL command was trusted only if the
4199 client host had authenticated. This control can now be exercised by an ACL
4200 for more flexibility.
4202 69. By default, callouts do not happen when testing with -bh. There is now a
4203 variant, -bhc, which does actually run the callout code, including
4204 consulting and updating the callout cache.
4206 70. Added support for saslauthd authentication, courtesy of Alexander
4209 71. If statvfs() failed on the spool or log directories while checking their
4210 size for availability, Exim confusingly gave the error "space shortage".
4211 Furthermore, in debugging mode it crashed with a floating point exception.
4212 These checks are done if check_{spool,log}_{space,inodes} are set, and when
4213 an SMTP message arrives with SIZE= on the MAIL command. As this is a really
4214 serious problem, Exim now writes to the main and panic logs when this
4215 happens, with details of the failure. It then refuses to accept the
4216 incoming message, giving the message "spool directory problem" or "log
4217 directory problem" with a 421 code for SMTP messages.
4219 72. When Exim is about to re-exec itself, it ensures that the file descriptors
4220 0, 1, and 2 exist, because some OS complain for execs without them (see
4221 ChangeLog 4.05/30). If necessary, Exim opens /dev/null to use for these
4222 descriptors. However, the code omitted to check that the open succeeded,
4223 causing mysterious errors if for some reason the permissions on /dev/null
4224 got screwed. Now Exim writes a message to the main and panic logs, and
4225 bombs out if it can't open /dev/null.
4227 73. Re-vamped the way daemon_smtp_port, local_interfaces, and -oX work and
4228 interact so that it is all more flexible. It is supposed to remain
4229 backwards compatible. Also added extra_local_interfaces.
4231 74. Invalid data sent to a SPA (NTLM) server authenticator could cause the code
4232 to bomb out with an assertion failure - to the client this appears as a
4233 connection drop. This problem occurs in the part of the code that was taken
4234 from the Samba project. Fortunately, the assertion is in a very simple
4235 function, so I have fixed this by reproducing the function inline in the
4236 one place where it is called, and arranging for authentication to fail
4237 instead of killing the process with assert().
4239 75. The SPA client code was not working when the server requested OEM rather
4240 than Unicode encoding.
4242 76. Added code to make require_files with a specific uid setting more usable in
4243 the case where statting the file as root fails - usually a non-root-mounted
4244 NFS file system. When this happens and the failure is EACCES, Exim now
4245 forks a subprocess and does the per-uid checking as the relevant uid.
4247 77. Added process_log_path.
4249 78. If log_file_path was not explicitly set, a setting of check_log_space or
4250 check_log_inodes was ignored.
4252 79. If a space check for the spool or log partitions fails, the incident is now
4253 logged. Of course, in the latter case the data may get lost...
4255 80. Added the %p formatting code to string_format() so that it can be used to
4256 print addresses in debug_print(). Adjusted all the address printing in the
4257 debugging in store.c to use %p rather than %d.
4259 81. There was a concern that a line of code in smtp_in.c could overflow a
4260 buffer if a HELO/EHLO command was given followed by 500 or so spaces. As
4261 initially expressed, the concern was not well-founded, because trailing
4262 spaces are removed early. However, if the trailing spaces were followed by
4263 a NULL, they did not get removed, so the overflow was possible. Two fixes
4266 (a) I re-wrote the offending code in a cleaner fashion.
4267 (b) If an incoming SMTP command contains a NULL character, it is rejected
4270 82. When Exim changes uid/gid to the Exim user at daemon start time, it now
4271 runs initgroups(), so that if the Exim user is in any additional groups,
4272 they will be used during message reception.
4278 The change log for 4.20 and earlier releases has been archived.
projects / exim.git / blob