(1) Checking for invalid "control=" modifiers was not working (for example,
[exim.git] / doc / doc-txt / ChangeLog
c5fcb476 1$Cambridge: exim/doc/doc-txt/ChangeLog,v 1.9 2004/10/18 11:36:23 ph10 Exp $
3Change log file for Exim from version 4.21
7Exim version 4.44
10 1. Minor wording change to the doc/README.SIEVE file.
139059f6 12 2. Change 4.43/35 introduced a bug: if quota_filecount was set, the
5fe762f6 13 computation of the current number of files was incorrect.
495ae4b0 14
15 3. Closing a stable door: arrange to panic-die if setitimer() ever fails. The
16 bug fixed in 4.43/37 would have been diagnosed quickly if this had been in
17 place.
19 4. Give more explanation in the error message when the command for a transport
20 filter fails to execute.
22 5. There are several places where Exim runs a non-Exim command in a
23 subprocess. The SIGUSR1 signal should be disabled for these processes. This
24 was being done only for the command run by the queryprogram router. It is
25 now done for all such subprocesses. The other cases are: ${run, transport
26 filters, and the commands run by the lmtp and pipe transports.
28 6. Added CONFIGURE_GROUP build-time option.
30 7. Some older OS have a limit of 256 on the maximum number of file
31 descriptors. Exim was using setrlimit() to set 1000 as a large value
32 unlikely to be exceeded. Change 4.43/17 caused a lot of logging on these
33 systems. I've change it so that if it can't get 1000, it tries for 256.
35edf2ff 34
35 8. "control=submission" was allowed, but had no effect, in a DATA ACL. This
36 was an oversight, and furthermore, ever since the addition of extra
37 controls (e.g. 4.43/32), the checks on when to allow different forms of
38 "control" were broken. There should now be diagnostics for all cases when a
39 control that does not make sense is encountered.
42Exim version 4.43
45 1. Fixed a longstanding but relatively impotent bug: a long time ago, before
46 PIPELINING, the function smtp_write_command() used to return TRUE or FALSE.
47 Now it returns an integer. A number of calls were still expecting a T/F
48 return. Fortuitously, in all cases, the tests worked in OK situations,
49 which is the norm. However, things would have gone wrong on any write
50 failures on the smtp file descriptor. This function is used when sending
51 messages over SMTP and also when doing verify callouts.
53 2. When Exim is called to do synchronous delivery of a locally submitted
54 message (the -odf or -odi options), it no longer closes stderr before doing
55 the delivery.
57 3. Implemented the mua_wrapper option.
59 4. Implemented mx_fail_domains and srv_fail_domains for the dnslookup router.
61 5. Implemented the functions header_remove(), header_testname(),
62 header_add_at_position(), and receive_remove_recipient(), and exported them
63 to local_scan().
65 6. If an ACL "warn" statement specified the addition of headers, Exim already
66 inserted X-ACL-Warn: at the start if there was no header name. However, it
67 was not making this test for the second and subsequent header lines if
68 there were newlines in the string. This meant that an invalid header could
69 be inserted if Exim was badly configured.
71 7. Allow an ACL "warn" statement to add header lines at the start or after all
72 the Received: headers, as well as at the end.
74 8. Added the rcpt_4xx retry error code.
76 9. Added postmaster_mailfrom=xxx to callout verification option.
7810. Added mailfrom=xxxx to the callout verification option, for verify=
79 header_sender only.
8111. ${substr_1_:xxxx} and ${substr__3:xxxx} are now diagnosed as syntax errors
82 (they previously behaved as ${substr_1_0:xxxx} and ${substr:_0_3:xxxx}).
8412. Inserted some casts to stop certain compilers warning when using pointer
85 differences as field lengths or precisions in printf-type calls (mostly
86 affecting debugging statements).
8813. Added optional readline() support for -be (dynamically loaded).
9014. Obscure bug fix: if a message error (e.g. 4xx to MAIL) happened within the
91 same clock tick as a message's arrival, so that its received time was the
92 same as the "first fail" time on the retry record, and that message
93 remained on the queue past the ultimate address timeout, every queue runner
94 would try a delivery (because it was past the ultimate address timeout) but
95 after another failure, the ultimate address timeout, which should have then
96 bounced the address, did not kick in. This was a "< instead of <=" error;
97 in most cases the first failure would have been in the next clock tick
98 after the received time, and all would be well.
10015. The special items beginning with @ in domain lists (e.g. @mx_any) were not
101 being recognized when the domain list was tested by the match_domain
102 condition in an expansion string.
10416. Added the ${str2b64: operator.
10617. Exim was always calling setrlimit() to set a large limit for the number of
107 processes, without checking whether the existing limit was already
108 adequate. (It did check for the limit on file descriptors.) Furthermore,
109 errors from getrlimit() and setrlimit() were being ignored. Now they are
110 logged to the main and panic logs, but Exim does carry on, to try to do its
111 job under whatever limits there are.
11318. Imported PCRE 5.0.
11519. Trivial typo in log message " temporarily refused connection" (the leading
116 space).
11820. If the log selector return_path_on_delivery was set and an address was
119 redirected to /dev/null, the delivery process crashed because it assumed
120 that a return path would always be set for a "successful" delivery. In this
121 case, the whole delivery is bypassed as an optimization, and therefore no
122 return path is set.
12421. Internal re-arrangement: the function for sending a challenge and reading
125 a response while authentication was assuming a zero-terminated challenge
126 string. It's now changed to take a pointer and a length, to allow for
127 binary data in such strings.
12922. Added the cyrus_sasl authenticator (code supplied by MBM).
13123. Exim was not respecting finduser_retries when seeking the login of the
132 uid under which it was called; it was always trying 10 times. (The default
133 setting of finduser_retries is zero.) Also, it was sleeping after the final
134 failure, which is pointless.
13624. Implemented tls_on_connect_ports.
13825. Implemented acl_smtp_predata.
14026. If the domain in control=submission is set empty, Exim assumes that the
141 authenticated id is a complete email address when it generates From: or
142 Sender: header lines.
14427. Added "#define SOCKLEN_T int" to OS/os.h-SCO and OS/os.h-SCO_SV. Also added
145 definitions to OS/Makefile-SCO and OS/Makefile-SCO_SV that put basename,
146 chown and chgrp in /bin and hostname in /usr/bin.
14828. Exim was keeping the "process log" file open after each use, just as it
149 does for the main log. This opens the possibility of it remaining open for
150 long periods when the USR1 signal hits a daemon. Occasional processlog
151 errors were reported, that could have been caused by this. Anyway, it seems
152 much more sensible not to leave this file open at all, so that is what now
153 happens.
15529. The long-running daemon process does not normally write to the log once it
156 has entered its main loop, and it closes the log before doing so. This is
157 so that log files can straightforwardly be renamed and moved. However,
158 there are a couple of unusual error situations where the daemon does write
159 log entries, and I had neglected to close the log afterwards.
16130. The text of an SMTP error response that was received during a remote
162 delivery was being truncated at 512 bytes. This is too short for some of
163 the long messages that one sometimes sees. I've increased the limit to
164 1024.
16631. It is now possible to make retry rules that apply only when a message has a
167 specific sender, in particular, an empty sender.
16932. Added "control = enforce_sync" and "control = no_enforce_sync". This makes
170 it possible to be selective about when SMTP synchronization is enforced.
17233. Added "control = caseful_local_part" and "control = "caselower_local_part".
17432. Implemented hosts_connection_nolog.
17633. Added an ACL for QUIT.
17834. Setting "delay_warning=" to disable warnings was not working; it gave a
179 syntax error.
18135. Added mailbox_size and mailbox_filecount to appendfile.
18336. Added control = no_multiline_responses to ACLs.
18537. There was a bug in the logic of the code that waits for the clock to tick
186 in the case where the clock went backwards by a substantial amount such
187 that the microsecond fraction of "now" was more than the microsecond
188 fraction of "then" (but the whole seconds number was less).
19038. Added support for the libradius Radius client library this is found on
191 FreeBSD (previously only the radiusclient library was supported).
194Exim version 4.42
197 1. When certain lookups returned multiple values in the form name=value, the
198 quoting of the values was not always being done properly. Specifically:
199 (a) If the value started with a double quote, but contained no whitespace,
200 it was not quoted.
201 (b) If the value contained whitespace other than a space character (i.e.
202 tabs or newlines or carriage returns) it was not quoted.
203 This fix has been applied to the mysql and pgsql lookups by writing a
204 separate quoting function and calling it from the lookup code. The fix
205 should probably also be applied to nisplus, ibase and oracle lookups, but
206 since I cannot test any of those, I have not disturbed their existing code.
208 2. A hit in the callout cache for a specific address caused a log line with no
209 reason for rejecting RCPT. Now it says "Previous (cached) callout
210 verification failure".
212 3. There was an off-by-one bug in the queryprogram router. An over-long
213 return line was truncated at 256 instead of 255 characters, thereby
214 overflowing its buffer with the terminating zero. As well as fixing this, I
215 have increased the buffer size to 1024 (and made a note to document this).
217 4. If an interrupt, such as the USR1 signal that is send by exiwhat, arrives
218 when Exim is waiting for an SMTP response from a remote server, Exim
219 restarts its select() call on the socket, thereby resetting its timeout.
220 This is not a problem when such interrupts are rare. Somebody set up a cron
221 job to run exiwhat every 2 minutes, which is less than the normal select()
222 timeout (5 or 10 minutes). This meant that the select() timeout never
223 kicked in because it was always reset. I have fixed this by comparing the
224 time when an interrupt arrives with the time at the start of the first call
225 to select(). If more time than the timeout has elapsed, the interrupt is
226 treated as a timeout.
228 5. Some internal re-factoring in preparation for the addition of Sieve
229 extensions (by MH). In particular, the "personal" test is moved to a
230 separate function, and given an option for scanning Cc: and Bcc: (which is
231 not set for Exim filters).
233 6. When Exim created an email address using the login of the caller as the
234 local part (e.g. when creating a From: or Sender: header line), it was not
235 quoting the local part when it contained special characters such as @.
237 7. Installed new OpenBSD configuration files.
239 8. Reworded some messages for syntax errors in "and" and "or" conditions to
240 try to make them clearer.
242 9. Callout options, other than the timeout value, were being ignored when
243 verifying sender addresses in header lines. For example, when using
245 verify = header_sender/callout=no_cache
247 the cache was (incorrectly) being used.
24910. Added a missing instance of ${EXE} to the exim_install script; this affects
250 only the Cygwin environment.
25211. When return_path_on_delivery was set as a log selector, if different remote
253 addresses in the same message used different return paths and parallel
254 remote delivery occurred, the wrong values would sometimes be logged.
255 (Whenever a remote delivery process finished, the return path value from
256 the most recently started remote delivery process was logged.)
25812. RFC 3848 specifies standard names for the "with" phrase in Received: header
259 lines when AUTH and/or TLS are in use. This is the "received protocol"
260 field. Exim used to use "asmtp" for authenticated SMTP, without any
261 indication (in the protocol name) for TLS use. Now it follows the RFC and
262 uses "esmtpa" if the connection is authenticated, "esmtps" if it is
263 encrypted, and "esmtpsa" if it is both encrypted and authenticated. These
264 names appear in log lines as well as in Received: header lines.
26613. Installed MH's patches for Sieve to add the "copy" and "vacation"
267 extensions, and comparison tests, and to fix some bugs.
26914. Changes to the "personal" filter test:
271 (1) The test was buggy in that it was just doing the equivalent of
272 "contains" tests on header lines. For example, if a user's address was
273 anne@some.where, the "personal" test would incorrectly be true for
275 To: susanne@some.where
277 This test is now done by extracting each address from the header in turn,
278 and checking the entire address. Other tests that are part of "personal"
279 are now done using regular expressions (for example, to check local parts
280 of addresses in From: header lines).
282 (2) The list of non-personal local parts in From: addresses has been
283 extended to include "listserv", "majordomo", "*-request", and "owner-*",
284 taken from the Sieve specification recommendations.
286 (3) If the message contains any header line starting with "List-" it is
287 treated as non-personal.
289 (4) The test for "circular" in the Subject: header line has been removed
290 because it now seems ill-conceived.
29215. Minor typos in src/EDITME comments corrected.
29416. Installed latest exipick from John Jetmore.
29617. If headers_add on a router specified a text string that was too long for
297 string_sprintf() - that is, longer than 8192 bytes - Exim panicked. The use
298 of string_sprintf() is now avoided.
30018. $message_body_size was not set (it was always zero) when running the DATA
301 ACL and the local_scan() function.
30319. For the "mail" command in an Exim filter, no default was being set for
304 the once_repeat time, causing a random time value to be used if "once" was
305 specified. (If the value happened to be <= 0, no repeat happened.) The
306 default is now 0s, meaning "never repeat". The "vacation" command was OK
307 (its default is 7d). It's somewhat surprising nobody ever noticed this bug
308 (I found it when inspecting the code).
31020. There is now an overall timeout for performing a callout verification. It
311 defaults to 4 times the callout timeout, which applies to individual SMTP
312 commands during the callout. The overall timeout applies when there is more
313 than one host that can be tried. The timeout is checked before trying the
314 next host. This prevents very long delays if there are a large number of
315 hosts and all are timing out (e.g. when the network connections are timing
316 out). The value of the overall timeout can be changed by specifying an
317 additional sub-option for "callout", called "maxwait". For example:
319 verify = sender/callout=5s,maxwait=20s
32121. Add O_APPEND to the open() call for maildirsize files (Exim already seeks
322 to the end before writing, but this should make it even safer).
32422. Exim was forgetting that it had advertised PIPELINING for the second and
325 subsequent messages on an SMTP connection. It was also not resetting its
326 memory on STARTTLS and an internal HELO.
32823. When Exim logs an SMTP synchronization error within a session, it now
329 records whether PIPELINING has been advertised or not.
33124. Added 3 instances of "(long int)" casts to time_t variables that were being
332 formatted using %ld, because on OpenBSD (and perhaps others), time_t is int
333 rather than long int.
33525. Installed the latest Cygwin configuration files from the Cygwin maintainer.
33726. Added the never_mail option to autoreply.
340Exim version 4.41
343 1. A reorganization of the code in order to implement 4.40/8 caused a daemon
344 crash if the getsockname() call failed; this can happen if a connection is
345 closed very soon after it is established. The problem was simply in the
346 order in which certain operations were done, causing Exim to try to write
347 to the SMTP stream before it had set up the file descriptor. The bug has
348 been fixed by making things happen in the correct order.
351Exim version 4.40
354 1. If "drop" was used in a DATA ACL, the SMTP output buffer was not flushed
355 before the connection was closed, thus losing the rejection response.
357 2. Commented out the definition of SOCKLEN_T in os.h-SunOS5. It is needed for
358 some early Solaris releases, but causes trouble in current releases where
359 socklen_t is defined.
361 3. When std{in,out,err} are closed, re-open them to /dev/null so that they
362 always exist.
364 4. Minor refactoring of os.c-Linux to avoid compiler warning when IPv6 is not
365 configured.
367 5. Refactoring in expand.c to improve memory usage. Pre-allocate a block so
368 that releasing the top of it at the end releases what was used for sub-
369 expansions (unless the block got too big). However, discard this block if
370 the first thing is a variable or header, so that we can use its block when
371 it is dynamic (useful for very large $message_headers, for example).
373 6. Lookups now cache *every* query, not just the most recent. A new, separate
374 store pool is used for this. It can be recovered when all lookup caches are
375 flushed. Lookups now release memory at the end of their result strings.
376 This has involved some general refactoring of the lookup sources.
378 7. Some code has been added to the store_xxx() functions to reduce the amount
379 of flapping under certain conditions.
381 8. log_incoming_interface used to affect only the <= reception log lines. Now
382 it causes the local interface and port to be added to several more SMTP log
383 lines, for example "SMTP connection from", and rejection lines.
385 9. The Sieve author supplied some patches for the doc/README.SIEVE file.
38710. Added a conditional definition of _BSD_SOCKLEN_T to os.h-Darwin.
38911. If $host_data was set by virtue of a hosts lookup in an ACL, its value
390 could be overwritten at the end of the current message (or the start of a
391 new message if it was set in a HELO ACL). The value is now preserved for
392 the duration of the SMTP connection.
39412. If a transport had a headers_rewrite setting, and a matching header line
395 contained an unqualified address, that address was qualified, even if it
396 did not match any rewriting rules. The underlying bug was that the values
397 of the flags that permit the existence of unqualified sender and recipient
398 addresses in header lines (set by {sender,recipient}_unqualified_hosts for
399 non-local messages, and by -bnq for local messages) were not being
400 preserved with the message after it was received.
40213. When Exim was logging an SMTP synchronization error, it could sometimes log
403 "next input=" as part of the text comprising the host identity instead of
404 the correct text. The code was using the same buffer for two different
405 strings. However, depending on which order the printing function evaluated
406 its arguments, the bug did not always show up. Under Linux, for example, my
407 test suite worked just fine.
40914. Exigrep contained a use of Perl's "our" scoping after change 4.31/70. This
410 doesn't work with some older versions of Perl. It has been changed to "my",
411 which in any case is probably the better facility to use.
41315. A really picky compiler found some instances of statements for creating
414 error messages that either had too many or two few arguments for the format
415 string.
41716. The size of the buffer for calls to the DNS resolver has been increased
418 from 1024 to 2048. A larger buffer is needed when performing PTR lookups
419 for addresses that have a lot of PTR records. This alleviates a problem; it
420 does not fully solve it.
42217. A dnsdb lookup for PTR records that receives more data than will fit in the
423 buffer now truncates the list and logs the incident, which is the same
424 action as happens when Exim is looking up a host name and its aliases.
425 Previously in this situation something unpredictable would happen;
426 sometimes it was "internal error: store_reset failed".
42818. If a server dropped the connection unexpectedly when an Exim client was
429 using GnuTLS and trying to read a response, the client delivery process
430 crashed while trying to generate an error log message.
43219. If a "warn" verb in an ACL added multiple headers to a message in a single
433 string, for example:
435 warn message = H1: something\nH2: something
437 the text was added as a single header line from Exim's point of view
438 though it ended up OK in the delivered message. However, searching for the
439 second and subsequent header lines using $h_h2: did not work. This has been
440 fixed. Similarly, if a system filter added multiple headers in this way,
441 the routers could not see them.
44320. Expanded the error message when iplsearch is called with an invalid key to
444 suggest using net-iplsearch in a host list.
44621. When running tests using -bh, any delays imposed by "delay" modifiers in
447 ACLs are no longer actually imposed (and a message to that effect is
448 output).
45022. If a "gecos" field in a passwd entry contained escaped characters, in
451 particular, if it contained a \" sequence, Exim got it wrong when building
452 a From: or a Sender: header from that name. A second bug also caused
453 incorrect handling when an unquoted " was present following a character
454 that needed quoting.
45623. "{crypt}" as a password encryption mechanism for a "crypteq" expansion item
457 was not being matched caselessly.
45924. Arranged for all hyphens in the exim.8 source to be escaped with
460 backslashes.
46225. Change 16 of 4.32, which reversed 71 or 4.31 didn't quite do the job
463 properly. Recipient callout cache records were still being keyed to include
464 the sender, even when use_sender was set false. This led to far more
465 callouts that were necessary. The sender is no longer included in the key
466 when use_sender is false.
46826. Added "control = submission" modifier to ACLs.
47027. Added the ${base62d: operator to decode base 62 numbers.
47228. dnsdb lookups can now access SRV records.
47429. CONFIGURE_OWNER can be set at build time to define an alternative owner for
475 the configuration file.
47730. The debug message "delivering xxxxxx-xxxxxx-xx" is now output in verbose
478 (-v) mode. This makes the output for a verbose queue run more intelligible.
48031. Added a use_postmaster feature to recipient callouts.
48232. Added the $body_zerocount variable, containing the number of binary zero
483 bytes in the message body.
48533. The time of last modification of the "new" subdirectory is now used as the
486 "mailbox time last read" when there is a quota error for a maildir
487 delivery.
48934. Added string comparison operators lt, lti, le, lei, gt, gti, ge, gei.
49135. Added +ignore_unknown as a special item in host lists.
49336. Code for decoding IPv6 addresses in host lists is now included, even if
494 IPv6 support is not being compiled. This fixes a bug in which an IPv6
495 address was recognized as an IP address, but was then not correctly decoded
496 into binary, causing unexpected and incorrect effects when compared with
497 another IP address.
500Exim version 4.34
503 1. Very minor rewording of debugging text in manualroute to say "list of
504 hosts" instead of "hostlist".
506 2. If verify=header_syntax was set, and a header line with an unqualified
507 address (no domain) and a large number of spaces between the end of the
508 name and the colon was received, the reception process suffered a buffer
509 overflow, and (when I tested it) crashed. This was caused by some obsolete
510 code that should have been removed. The fix is to remove it!
512 3. When running in the test harness, delay a bit after writing a bounce
513 message to get a bit more predictability in the log output.
515 4. Added a call to search_tidyup() just before forking a reception process. In
516 theory, someone could use a lookup in the expansion of smtp_accept_max_
517 per_host which, without the tidyup, could leave open a database connection.
519 5. Added the variables $recipient_data and $sender_data which get set from a
520 lookup success in an ACL "recipients" or "senders" condition, or a router
521 "senders" option, similar to $domain_data and $local_part_data.
523 6. Moved the writing of debug_print from before to after the "senders" test
524 for routers.
526 7. Change 4.31/66 (moving the time when the Received: is generated) caused
527 problems for message scanning, either using a data ACL, or using
528 local_scan() because the Received: header was not generated till after they
529 were called (in order to set the time as the time of reception completion).
530 I have revised the way this works. The header is now generated after the
531 body is received, but before the ACL or local_scan() are called. After they
532 are run, the timestamp in the header is updated.
535Exim version 4.33
538 1. Change 4.24/6 introduced a bug because the SIGALRM handler was disabled
539 before starting a queue runner without re-exec. This happened only when
540 deliver_drop_privilege was set or when the Exim user was set to root. The
541 effect of the bug was that timeouts during subsequent deliveries caused
542 crashes instead of being properly handled. The handler is now left at its
543 default (and expected) setting.
545 2. The other case in which a daemon avoids a re-exec is to deliver an incoming
546 message, again when deliver_drop_privilege is set or Exim is run as root.
547 The bug described in (1) was not present in this case, but the tidying up
548 of the other signals was missing. I have made the two cases consistent.
550 3. The ignore_target_hosts setting on a manualroute router was being ignored
551 for hosts that were looked up using the /MX notation.
553 4. Added /ignore=<ip list> feature to @mx_any, @mx_primary, and @mx_secondary
554 in domain lists.
556 5. Change 4.31/55 was buggy, and broke when there was a rewriting rule that
557 operated on the sender address. After changing the $sender_address to <>
558 for the sender address verify, Exim was re-instated it as the original
559 (before rewriting) address, but remembering that it had rewritten it, so it
560 wasn't rewriting it again. This bug also had the effect of breaking the
561 sender address verification caching when the sender address was rewritten.
563 6. The ignore_target_hosts option was being ignored by the ipliteral router.
564 This has been changed so that if the ip literal address matches
565 ignore_target_hosts, the router declines.
567 7. Added expansion conditions match_domain, match_address, and match_local_
568 part (NOT match_host).
570 8. The placeholder for the Received: header didn't have a length field set.
572 9. Added code to Exim itself and to exim_lock to test for a specific race
573 condition that could lead to file corruption when using MBX delivery. The
574 issue is with the lockfile that is created in /tmp. If this file is removed
575 after a process has opened it but before that process has acquired a lock,
576 there is the potential for a second process to recreate the file and also
577 acquire a lock. This could lead to two Exim processes writing to the file
578 at the same time. The added code performs the same test as UW imapd; it
579 checks after acquiring the lock that its file descriptor still refers to
580 the same named file.
58210. The buffer for building added header lines was of fixed size, 8192 bytes.
583 It is now parameterized by HEADER_ADD_BUFFER_SIZE and this can be adjusted
584 when Exim is built.
58611. Added the smtp_active_hostname option. If used, this will typically be made
587 to depend on the incoming interface address. Because $interface_address is
588 not set up until the daemon has forked a reception process, error responses
589 that can happen earlier (such as "too many connections") no longer contain
590 a host name.
59212. If an expansion in a condition on a "warn" statement fails because a lookup
593 defers, the "warn" statement is abandoned, and the next ACL statement is
594 processed. Previously this caused the whole ACL to be aborted.
59613. Added the iplsearch lookup type.
59814. Added ident_timeout as a log selector.
60015. Added tls_certificate_verified as a log selector.
60216. Added a global option tls_require_ciphers (compare the smtp transport
603 option of the same name). This controls incoming TLS connections.
60517. I finally figured out how to make tls_require_ciphers do a similar thing
606 in GNUtls to what it does in OpenSSL, that is, set up an appropriate list
607 before starting the TLS session.
60918. Tabs are now shown as \t in -bP output.
61119. If the log selector return_path_on_delivery was set, Exim crashed when
612 bouncing a message because it had too many Received: header lines.
61420. If two routers both had headers_remove settings, and the first one included
615 a superfluous trailing colon, the final name in the first list and the
616 first name in the second list were incorrectly joined into one item (with a
617 colon in the middle).
620Exim version 4.32
623 1. Added -C and -D options to the exinext utility, mainly to make it easier
624 to include in the automated testing, but these could be helpful when
625 multiple configurations are in use.
627 2. The exinext utility was not formatting the output nicely when there was
628 an alternate port involved in the retry record key, nor when there was a
629 message id as well (for retries that were specific to a specific message
630 and a specific host). It was also confused by IPv6 addresses, because of
631 the additional colons they contain. I have fixed the IPv4 problem, and
632 patched it up to do a reasonable job for IPv6.
634 3. When there is an error after a MAIL, RCPT, or DATA SMTP command during
635 delivery, the log line now contains "pipelined" if PIPELINING was used.
637 4. An SMTP transport process used to panic and die if the bind() call to set
638 an explicit outgoing interface failed. This has been changed; it is now
639 treated in the same way as a connect() failure.
641 5. A reference to $sender_host_name in the part of a conditional expansion
642 that was being skipped was still causing a DNS lookup. This no longer
643 occurs.
645 6. The def: expansion condition was not recognizing references to header lines
646 that used bh_ and bheader_.
648 7. Added the _cache feature to named lists.
650 8. The code for checking quota_filecount in the appendfile transport was
651 allowing one more file than it should have been.
653 9. For compatibility with Sendmail, the command line option
655 -prval:sval
657 is equivalent to
659 -oMr rval -oMs sval
661 and sets the incoming protocol and host name (for trusted callers). The
662 host name and its colon can be omitted when only the protocol is to be set.
663 Note the Exim already has two private options, -pd and -ps, that refer to
664 embedded Perl. It is therefore impossible to set a protocol value of "d" or
665 "s", but I don't think that's a major issue.
66710. A number of refactoring changes to the code, none of which should affect
668 Exim's behaviour:
670 (a) The number of logging options was getting close to filling up the
671 32-bit word that was used as a bit map. I have split them into two classes:
672 those that are passed in the argument to log_write(), and those that are
673 only ever tested independently outside of that function. These are now in
674 separate 32-bit words, so there is plenty of room for expansion again.
675 There is no change in the user interface or the logging behaviour.
677 (b) When building, for example, log lines, the code previously used a
678 macro that called string_cat() twice, in order to add two strings. This is
679 not really sufficiently general. Furthermore, there was one instance where
680 it was actually wrong because one of the argument was used twice, and in
681 one call a function was used. (As it happened, calling the function twice
682 did not affect the overall behaviour.) The macro has been replaced by a
683 function that can join an arbitrary number of extra strings onto a growing
684 string.
686 (c) The code for expansion conditions now uses a table and a binary chop
687 instead of a serial search (which was left over from when there were very
688 few conditions). Also, it now recognizes conditions like "pam" even when
689 the relevant support is not compiled in: a suitably worded error message is
690 given if an attempt is made to use such a condition.
69211. Added ${time_interval:xxxxx}.
69412. A bug was causing one of the ddress fields not to be passed back correctly
695 from remote delivery subprocesses. The field in question was not being
696 subsequently used, so this caused to problems in practice.
69813. Added new log selectors queue_time and deliver_time.
70014. Might have fixed a bug in maildirsizefile handling that threw up
701 "unexpected character" debug warnings, and recalculated the data
702 unnecessarily. In any case, I expanded the warning message to give more
703 information.
70515. Added the message "Restricted characters in address" to the statements in
706 the default ACL that block characters like @ and % in local parts.
70816. Change 71 for release 4.31 proved to be much less benign that I imagined.
709 Three changes have been made:
711 (a) There was a serious bug; a negative response to MAIL caused the whole
712 recipient domain to be cached as invalid, thereby blocking all messages
713 to all local parts at the same domain, from all senders. This bug has
714 been fixed. The domain is no longer cached after a negative response to
715 MAIL if the sender used is not empty.
717 (b) The default behaviour of using MAIL FROM:<> for recipient callouts has
718 been restored.
720 (c) A new callout option, "use_sender" has been added for people who want
721 the modified behaviour.
724Exim version 4.31
727 1. Removed "EXTRALIBS=-lwrap" from OS/Makefile-Unixware7 on the advice of
728 Larry Rosenman.
730 2. Removed "LIBS = -lresolv" from OS/Makefile-Darwin as it is not needed, and
731 indeed breaks things for older releases.
733 3. Added additional logging to the case where there is a problem reading data
734 from a filter that is running in a subprocess using a pipe, in order to
735 try to track down a specific problem.
737 4. Testing facility fudge: when running in the test harness and attempting
738 to connect to 10.x.x.x (expecting a connection timeout) I'm now sometimes
739 getting "No route to host". Convert this to a timeout.
741 5. Define ICONV_ARG2_TYPE as "char **" for Unixware7 to avoid compiler
742 warning.
744 6. Some OS don't have socklen_t but use size_t instead. This affects the
745 fifth argument of getsockopt() amongst other things. This is now
746 configurable by a macro called SOCKLEN_T which defaults to socklen_t, but
747 can be set for individual OS. I have set it for SunOS5, OSF1, and
748 Unixware7. Current versions of SunOS5 (aka Solaris) do have socklen_t, but
749 some earlier ones do not.
751 7. Change 4.30/15 was not doing the test caselessly.
753 8. The standard form for an IPv6 address literal was being rejected by address
754 parsing in, for example, MAIL and RCPT commands. An example of this kind of
755 address is [IPv6:2002:c1ed:8229:10:202:2dff:fe07:a42a]. Exim now accepts
756 this, as well as the form without the "IPv6" on the front (but only when
757 address literals are enabled, of course).
759 9. Added some casts to avoid compiler warnings in OS/os.c-Linux.
76110. Exim crashed if a message with an empty sender address specified by -f
762 encountered a router with an errors_to setting. This could be provoked only
763 by a command such as
765 exim -f "" ...
767 where an empty string was supplied; "<>" did not hit this bug.
76911. Installed PCRE release 4.5.
77112. If EHLO/HELO was rejected by an ACL, the value of $sender_helo_name
772 remained set. It is now erased.
77413. exiqgrep wasn't working on MacOS X because it didn't correctly compute
775 times from message ids (which are base 36 rather than the normal 62).
77714. "Expected" SMTP protocol errors that can arise when PIPELINING is in use
778 were being counted as actual protocol errors, and logged if the log
779 selector +smtp_protocol_error was set. One cannot be perfect in this test,
780 but now, if PIPELINING has been advertised, RCPT following a rejected MAIL,
781 and DATA following a set of rejected RCPTs do not count as protocol errors.
782 In other words, Exim assumes they were pipelined, though this may not
783 actually be the case. Of course, in all cases the client gets an
784 appropriate error code.
78615. If a lookup fails in an ACL condition, a message about the failure may
787 be available; it is used if testing the ACL cannot continue, because most
788 such messages specify what the cause of the deferral is. However, some
789 messages (e.g. "MYSQL: no data found") do not cause a defer. There was bug
790 that caused an old message to be retained and used if a later statement
791 caused a defer, replacing the real cause of the deferral.
79316. If an IP address had so many PTR records that the DNS lookup buffer
794 was not large enough to hold them, Exim could crash while trying to process
795 the truncated data. It now detects and logs this case.
79717. Further to 4.21/58, another change has been made: if (and only if) the
798 first line of a message (the first header line) ends with CRLF, a bare LF
799 in a subsequent header line has a space inserted after it, so as not to
800 terminate the header.
80218. Refactoring: tidied an ugly bit of code in appendfile that copied data
803 unnecessarily, used atoi() instead of strtol(), and didn't check the
804 termination when getting file sizes from file names by regex.
80619. Completely re-implemented the support for maildirsize files, in the light
807 of a number of problems with the previous contributed implementation
808 (4.30/29). In particular:
810 . If the quota is zero, the maildirsize file is maintained, but no quota is
811 imposed.
813 . If the maildir directory does not exist, it is created before any attempt
814 to write a maildirsize file.
816 . The quota value in the file is just a cache; if the quota is changed in
817 the transport, the new value overrides.
819 . A regular expression is available for excluding directories from the
820 count.
82220. The autoreply transport checks the characters in options that define the
823 message's headers; it allows continued headers, but it was checking with
824 isspace() after an embedded newline instead of explicitly looking for a
825 space or a tab.
82721. If all the "regular" hosts to which an address was routed had passed their
828 expiry times, and had not reached their retry times, the address was
829 bounced, even if fallback hosts were defined. Now Exim should go on to try
830 the fallback hosts.
83222. Increased buffer sizes in the callout code from 1024 to 4096 to match the
833 equivalent code in the SMTP transport. Some hosts send humungous responses
834 to HELO/EHLO, more than 1024 it seems.
83623. Refactoring: code in filter.c used (void *) for "any old type" but this
837 gives compiler warnings in some environments. I've now done it "properly",
838 using a union.
84024. The replacement for inet_ntoa() that is used with gcc on IRIX systems
841 (because of problems with the built-in one) was declared to return uschar *
842 instead of char *, causing compiler failure.
84425. Fixed a file descriptor leak when processing alias/forward files.
84626. Fixed a minor format string issue in dbfn.c.
84827. Typo in exim.c: ("dmbnz" for "dbmnz").
85028. If a filter file refered to $h_xxx or $message_headers, and the headers
851 contained RFC 2047 "words", Exim's memory could, under certain conditions,
852 become corrupted.
85429. When a sender address is verified, it is cached, to save repeating the test
855 when there is more than one recipient in a message. However, when the
856 verification involves a callout, it is possible for different callout
857 options to be set for different recipients. It is too complicated to keep
858 track of this in the cache, so now Exim always runs a verification when a
859 callout is required, relying on the callout cache for the optimization.
860 The overhead is duplication of the address routing, but this should not be
861 too great.
86330. Fixed a bug in callout caching. If a RCPT command caused the sender address
864 to be verified with callout=postmaster, and the main callout worked but the
865 postmaster check failed, the verification correctly failed. However, if a
866 subsequent RCPT command asked for sender verification *without* the
867 postmaster check, incorrect caching caused this verification also to fail,
868 incorrectly.
87031. Exim caches DNS lookup failures so as to avoid multiple timeouts; however,
871 it was not caching the DNS options (qualify_single, search_parents) that
872 were used when the lookup failed. A subsequent lookup with different
873 options therefore always gave the same answer, though there were cases
874 where it should not have. (Example: a "domains = !$mx_any" option on a
875 dnslookup router: the "domains" option is always processed without any
876 widening, but the router might have qualify_single set.) Now Exim uses the
877 cached value only when the same options are set.
87932. Added John Jetmore's "exipick" utility to the distribution.
88133. GnuTLS: When an attempt to start a TLS session fails for any reason other
882 than a timeout (e.g. a certificate is required, and is not provided), an
883 Exim server now closes the connection immediately. Previously it waited for
884 the client to close - but if the client is SSL, it seems that they each
885 wait for each other, leading to a delay before one of them times out.
88734: GnuTLS: Updated the code to use the new GnuTLS 1.0.0 API. I have not
888 maintained 0.8.x compatibility because I don't think many are using it, and
889 it is clearly obsolete.
89135. Added TLS support for CRLs: a tls_crl global option and one for the smtp
892 transport.
89436. OpenSSL: $tls_certificate_verified was being set to 1 even if the
895 client certificate was expired. A simple patch fixes this, though I don't
896 understand the full logic of why the verify callback is called multiple
897 times.
89937. OpenSSL: a patch from Robert Roselius: "Enable client-bug workaround.
900 Versions of OpenSSL as of 0.9.6d include a 'CBC countermeasure' feature,
901 which causes problems with some clients (such as the Certicom SSL Plus
902 library used by Eudora). This option, SSL_OP_DONT_INSERT_EMPTY_FRAGMENTS,
903 disables the coutermeasure allowing Eudora to connect."
90538. Exim was not checking that a write() to a log file succeeded. This could
906 lead to Bad Things if a log got too big, in particular if it hit a file
907 size limit. Exim now panics and dies if it cannot write to a log file, just
908 as it does if it cannot open a log file.
91039. Modified OS/Makefile-Linux so that it now contains
914 The two -D definitions ensure that Exim is compiled with large file
915 support, which makes it possible to handle log files that are bigger than
916 2^31.
91840. Fixed a subtle caching bug: if (in an ACL or a set of routers, for
919 instance) a domain was checked against a named list that involved a lookup,
920 causing $domain_data to be set, then another domain was checked against the
921 same list, then the first domain was re-checked, the value of $domain_data
922 after the final check could be wrong. In particular, if the second check
923 failed, it could be set empty. This bug probably also applied to
924 $localpart_data.
92641. The strip_trailing_dot option was not being applied to the address given
927 with the -f command-line option.
92942. The code for reading a message's header from the spool was incrementing
930 $received_count, but never initializing it. This meant that the value was
931 incorrect (doubled) while delivering a message in the same process in which
932 it was received. In the most common configuration of Exim, this never
933 happens - a fresh exec is done - but it can happen when
934 deliver_drop_privilege is set.
93643. When Exim logs an SMTP synchronization error - client data sent too soon -
937 it now includes up to 150 characters of the unexpected data in the log
938 line.
94044. The exim_dbmbuild utility uses fixed size buffers for reading input lines
941 and building data strings. The size of both of these buffers was 10 000
942 bytes - far larger than anybody would *ever* want, thought I. Needless to
943 say, somebody hit the limit. I have increased the maximum line length to
944 20 000 and the maximum data length of concatenated lines to 100 000. I have
945 also fixed two bugs, because there was no checking on these buffers. Tsk,
946 tsk. Now exim_dbmbuild gives a message and exits with an error code if a
947 buffer is too small.
94945. The exim_dbmbuild utility did not support quoted keys, as Exim does in
950 lsearch lookups. Now it does.
95246. When parsing a route_list item in a manualroute router, a fixed-length
953 buffer was used for the list of hosts. I made this 1024 bytes long,
954 thinking that nobody would ever have a list of hosts that long. Wrong.
955 Somebody had a whole pile of complicated expansion conditions, and the
956 string was silently truncated, leading to an expansion error. It turns out
957 that it is easier to change to an unlimited length (owing to other changes
958 that have happened since this code was originally written) than to build
959 structure for giving a limitation error. The length of the item that
960 expands into the list of hosts is now unlimited.
96247. The lsearch lookup could not handle data where the length of text line was
963 more than 4095 characters. Such lines were truncated, leading to shortened
964 data being returned. It should now handle lines of any length.
96648. Minor wording revision: "cannot test xxx in yyy ACL" becomes "cannot test
967 xxx condition in yyy ACL" (e.g. "cannot test domains condition in DATA
968 ACL").
97049. Cosmetic tidy to scripts like exicyclog that are generated by globally
971 replacing strings such as BIN_DIRECTORY in a source file: the replacement
972 no longer happens in comment lines. A list of replacements is now placed
973 at the head of all of the source files, except those whose only change is
974 to replace PERL_COMMAND in the very first #! line.
97650. Replaced the slow insertion sort in queue.c, for sorting the list of
977 messages on the queue, with a bottom-up merge sort, using code contributed
978 by Michael Haardt. This should make operations like -bp somewhat faster on
979 large queues. It won't affect queue runners, except when queue_run_in_order
980 is set.
98251. Installed eximstats 1.31 in the distribution.
98452. Added support for SRV lookups to the dnslookup router.
98653. If an ACL referred to $message_body or $message_body_end, the value was not
987 reset for any messages that followed in the same SMTP session.
98954. The store-handling optimization for building very long strings was not
990 differentiating between the different store pools. I don't think this
991 actually made any difference in practice, but I've tidied it.
99355. While running the routers to verify a sender address, $sender_address
994 was still set to the sender address. This is wrong, because when routing to
995 send a bounce to the sender, it would be empty. Therefore, I have changed
996 it so that, while verifying a sender address, $sender_address is set to <>.
997 (There is no change to what happens when verifying a recipient address.)
99956. After finding MX (or SRV) records, Exim was doing a DNS lookup for the
1000 target A or AAAA records (if not already returned) without resetting the
1001 qualify_single or search_parents options of the DNS resolver. These are
1002 inappropriate in this case because the targets of MX and SRV records must
1003 be FQDNs. A broken DNS record could cause trouble if it happened to have a
1004 target that, when qualified, matched something in the local domain. These
1005 two options are now turned off when doing these lookups.
100757. It seems that at least some releases of Reiserfs (which does not have the
1008 concept of a fixed number of inodes) returns zero and not -1 for the
1009 number of available inodes. This interacted badly with check_spool_inodes,
1010 which assumed that -1 was the "no such thing" setting. What I have done is
1011 to check that the total number of inodes is greater than zero before doing
1012 the test of how many are available.
101458. When a "warn" ACL statement has a log_message modifier, the message is
1015 remembered, and not repeated. This is to avoid a lot of repetition when a
1016 message has many recipients that cause the same warning to be written.
1017 Howewer, Exim was preserving the list of already written lines for an
1018 entire SMTP session, which doesn't seem right. The memory is now reset if a
1019 new message is started.
102159. The "rewrite" debugging flag was not showing the result of rewriting in the
1022 debugging output unless log_rewrite was also set.
102460. Avoid a compiler warning on 64-bit systems in dsearch.c by avoiding the use
1025 of (int)(handle) when we know that handle contains (void *)(-1).
102761. The Exim daemon panic-logs an error return when it closes the incoming
1028 connection. However "connection reset by peer" seems to be common, and
1029 isn't really an error worthy of noting specially, so that particular error
1030 is no long logged.
103262. When Exim is trying to find all the local interfaces, it used to panic and
1033 die if the ioctl to get the interface flags failed. However, it seems that
1034 on at least one OS (Solaris 9) it is possible to have an interface that is
1035 included in the list of interfaces, but for which you get a failure error
1036 for this call. This happens when the interface is not "plumbed" into a
1037 protocol (i.e. neither IPv4 nor IPv6). I've changed the code so that a
1038 failure of the "get flags" call assumes that the interface is down.
104063. Added a ${eval10: operator, which assumes all numbers are decimal. This
1041 makes life easier for people who are doing arithmetic on fields extracted
1042 from dates, where you often get leading zeros that should not be
1043 interpreted as octal.
104564. Added qualify_domain to the redirect router, to override the global
1046 setting.
104865. If a pathologically long header line contained very many addresses (the
1049 report of this problem mentioned 10 000) and each of them was rewritten,
1050 Exim could use up a very large amount of memory. (It kept on making new
1051 copies of the header line as it rewrote, and never released the old ones.)
1052 At the expense of a bit more processing, the header rewriting function has
1053 been changed so that it no longer eats memory in this way.
105566. The generation of the Received: header has been moved from the time that a
1056 message starts to be received, to the time that it finishes. The timestamp
1057 in the Received: header should now be very close to that of the <= log
1058 line. There are two side-effects of this change:
1060 (a) If a message is rejected by a DATA or non-SMTP ACL or local_scan(), the
1061 logged header lines no longer include the local Received: line, because
1062 it has not yet been created. The same applies to a copy of the message
1063 that is returned to a non-SMTP sender when a message is rejected.
1065 (b) When a filter file is tested using -bf, no additional Received: header
1066 is added to the test message. After some thought, I decided that this
1067 is a bug fix.
1069 This change does not affect the value of $received_for. It is still set
1070 after address rewriting, but before local_scan() is called.
107267. Installed the latest Cygwin-specific files from the Cygwin maintainer.
107468. GnuTLS: If an empty file is specified for tls_verify_certificates, GnuTLS
1075 gave an unhelpful panic error message, and a defer error. I have managed to
1076 change this behaviour so that it now rejects any supplied certificate,
1077 which seems right, as the list of acceptable certificates is empty.
107969. OpenSSL: If an empty file is specified for tls_verify_certificates, OpenSSL
1080 gave an unhelpful defer error. I have not managed to make this reject any
1081 supplied certificates, but the error message it gives is "no certificate
1082 supplied", which is not helpful.
108470. exigrep's output now also includes lines that are not associated with any
1085 message, but which match the given pattern. Implemented by a patch from
1086 Martin Sluka, which also tidied up the Perl a bit.
108871. Recipient callout verification, like sender verification, was using <> in
1089 the MAIL FROM command. This isn't really the right thing, since the actual
1090 sender may affect whether the remote host accepts the recipient or not. I
1091 have changed it to use the actual sender in the callout; this means that
1092 the cache record is now keyed on a recipient/sender pair, not just the
1093 recipient address. There doesn't seem to be a real danger of callout loops,
1094 since a callout by the remote host to check the sender would use <>.
1095 [SEE ABOVE: changed after hitting problems.]
109772. Exim treats illegal SMTP error codes that do not begin with 4 or 5 as
1098 temporary errors. However, in the case of such a code being given after
1099 the end of a data transmission (i.e. after ".") Exim was failing to write
1100 a retry record for the message. (Yes, there was some broken host that was
1101 actually sending 8xx at this point.)
110373. An unknown lookup type in a host list could cause Exim to panic-die when
1104 the list was checked. (An example that provoked this was putting <; in the
1105 middle of a list instead of at the start.) If this happened during a DATA
1106 ACL check, a -D file could be left lying around. This kind of configuration
1107 error no longer causes Exim to die; instead it causes a defer errror. The
1108 incident is still logged to the main and panic logs.
111074. Buglet left over from Exim 3 conversion. The message "too many messages
1111 in one connection" was written to the rejectlog but not the mainlog, except
1112 when address rewriting (yes!) was being logged.
111475. Added write_rejectlog option.
111676. When a system filter was run not as root (that is, when system_filter_user
1117 was set), the values of the $n variables were not being returned to the
1118 main process; thus, they were not subsequently available in the $sn
1119 variables.
112177. Added +return_path_on_delivery log selector.
112378. A connection timeout was being treated differently from recipients deferred
1124 when testing hosts_max_try with a message that was older than the host's
1125 retry timeout. (The host should not be counted, thus allowing all hosts to
1126 be tried at least once before bouncing.) This may have been the cause of an
1127 occasionally reported bug whereby a message would remain on the queue
1128 longer than the retry timeout, but would be bounced if a delivery was
1129 forced. I say "may" because I never totally pinned down the problem;
1130 setting up timeout/retry tests is difficult. See also the next item.
113279. The ultimate address timeout was not being applied to errors that involved
1133 a combination of host plus message (for example, a timeout on a MAIL
1134 command). When an address resolved to a number of possible hosts, and they
1135 were not all tried for each delivery (e.g. because of hosts_max_try), a
1136 message could remain on the queue longer than the retry timeout.
113880. Sieve bug: "stop" inside "elsif" was broken. Applied a patch from Michael
1139 Haardt.
114181. Fixed an obscure SMTP outgoing bug which required at least the following
1142 conditions: (a) there was another message waiting for the same server;
1143 (b) the server returned 5xx to all RCPT commands in the first message so
1144 that the message was not completed; (c) the server dropped the connection
1145 or gave a negative response to the RSET that Exim sends to abort the
1146 transaction. The observed case was a dropped connection after DATA that had
1147 been sent in pipelining mode. That is, the server had advertised PIPELINING
1148 but was not implementing it correctly. The effect of the bug was incorrect
1149 behaviour, such as trying another host, and this could lead to a crash.
1152Exim version 4.30
1155 1. The 3rd arguments to getsockname(), getpeername(), and accept() in exim.c
1156 and daemon.c were passed as pointers to ints; they should have been
1157 pointers to socklen_t variables (which are typically unsigned ints).
1159 2. Some signed/unsigned type warnings in the os.c file for Linux have been
1160 fixed.
1162 3. Fixed a really odd bug that affected only the testing scheme; patching a
1163 certain fixed string in the binary changed the value of another string that
1164 happened to be identical to the end of the original first string.
1166 4. When gethostbyname() (or equivalent) is passed an IP address as a "host
1167 name", it returns that address as the IP address. On some operating
1168 systems (e.g. Solaris), it also passes back the IP address string as the
1169 "host name". However, on others (e.g. Linux), it passes back an empty
1170 string. Exim wasn't checking for this, and was changing the host name to an
1171 empty string, assuming it had been canonicized.
1173 5. Although rare, it is permitted to have more than one PTR record for a given
1174 IP address. I thought that gethostbyaddr() or getipnodebyaddr() always gave
1175 all the names associated with an address, because they do in Solaris.
1176 However, it seems that they do not in Linux for data that comes from the
1177 DNS. If an address in /etc/hosts has multiple names, they _are_ all given.
1178 I found this out when I moved to a new Linux workstation and tried to run
1179 the Exim test suite.
1181 To get round this problem I have changed the code so that it now does its
1182 own call to the DNS to look up PTR records when searching for a host name.
1183 If nothing can be found in the DNS, it tries gethostbyaddr(), so that
1184 addresses that are only in /etc/hosts are still found.
1186 This behaviour is, however, controlled by an option called host_lookup_
1187 order, which defaults to "bydns:byaddr". If people want to use the other
1188 order, or indeed, just use one or the other means of lookup, they can
1189 specify it in this variable.
1191 6. If a PTR record yields an empty name, Exim treats it as non-existent. In
1192 some operating systems, this comes back from gethostbyaddr() as an empty
1193 string, and this is what Exim used to test for. However, it seems that in
1194 other systems, "." is yielded. Exim now tests for this case too.
1196 7. The values of check_spool_space and check_log_space are now held internally
1197 as a number of kilobytes instead of an absolute number of bytes. If a
1198 numbers is specified without 'K' or 'M', it is rounded up to the nearest
1199 kilobyte. This means that much larger values can be stored.
1201 8. Exim monitor: an attempt to get the action menu when not actually pointing
1202 at a message produces an empty menu entitled "No message selected". This
1203 works on Solaris (OpenWindows). However, XFree86 does not like a menu with
1204 no entries in it ("Shell widget menu has zero width and/or height"). So I
1205 have added a single, blank menu entry in this case.
1207 9. Added ${quote_local_part.
120910. MIME decoding is now applied to the contents of Subject: header lines when
1210 they are logged.
121211. Now that a reference to $sender_host_address automatically causes a reverse
1213 lookup to occur if necessary (4.13/18), there is no need to arrange for a
1214 host lookup before query-style lookups in lists that might use this
1215 variable. This has therefore been abolished, and the "net-" prefix is no
1216 longer necessary for query-style lookups.
121812. The Makefile for SCO_SV contained a setting of LDFLAGS. This appears to
1219 have been a typo for LFLAGS, so it has been changed.
122113. The install script calls Exim with "-C /dev/null" in order to find the
1222 version number. If ALT_CONFIG_PREFIX was set, this caused an error message
1223 to be output. Howeve, since Exim outputs its version number before the
1224 error, it didn't break the script. It just looked ugly. I fixed this by
1225 always allowing "-C /dev/null" if the caller is root.
122714. Ignore overlarge ACL variable number when reading spool file - insurance
1228 against a later release with more variables having written the file.
123015. The standard form for an IPv6 address literal was being rejected by EHLO.
1231 Example: [IPv6:2002:c1ed:8229:10:202:2dff:fe07:a42a]. Exim now accepts
1232 this, as well as the form without the "IPv6" on the front.
123416. Added CHOWN_COMMAND=/usr/sbin/chown and LIBS=-lresolv to the
1235 OS/Makefile-Darwin file.
123717. Fixed typo in lookups/ldap.c: D_LOOKUP should be D_lookup. This applied
1238 only to LDAP libraries that do not have LDAP_OPT_DEREF.
124018. After change 4.21/52, "%ld" was used to format the contents of the $inode
1241 variable. However, some OS use ints for inodes. I've added cast to long int
1242 to get rid of the compiler warning.
124419. I had forgotten to lock out "/../" in configuration file names when
1245 ALT_CONFIG_PREFIX was set.
124720. Routers used for verification do not need to specify transports. However,
1248 if such a router generated a host list, and callout was configured, Exim
1249 crashed, because it could not find a port number from the (non-existent)
1250 transport. It now assumes port 25 in this circumstance.
125221. Added the -t option to exigrep.
125422. If LOOKUP_LSEARCH is defined, all three linear search methods (lsearch,
1255 wildlsearch, nwildlsearch) are compiled. LOOKUP_WILDLSEARCH and LOOKUP_
1256 NWILDLSEARCH are now obsolete, but retained for compatibility. If either of
1257 them is set, LOOKUP_LSEARCH is forced.
125923. "exim -bV" now outputs a list of lookups that are included in the binary.
126124. Added sender and host information to the "rejected by local_scan()" log
1262 line; previously there was no indication of these.
126425. Added .include_if_exists.
126626. Change 3.952/11 added an explicit directory sync on top of a file sync for
1267 Linux. It turns out that not all file systems support this. Apparently some
1268 versions of NFS do not. (It's rare to put Exim's spool on NFS, but people
1269 do it.) To cope with this, the error EINVAL, which means that sync-ing is
1270 not supported on the file descriptor, is now ignored when Exim is trying to
1271 sync a directory. This applies only to Linux.
127327. Added -DBIND_8_COMPAT to the CLFAGS setting for Darwin.
127528. In Darwin (MacOS X), the PAM headers are in /usr/include/pam and not in
1276 /usr/include/security. There's now a flag in OS/os.h-Darwin to cope with
1277 this.
127929. Added support for maildirsize files from supplied patch (modified a bit).
128130. The use of :fail: followed by an empty string could lead Exim to respond to
1282 sender verification failures with (e.g.):
1284 550 Verification failed for <xxx>
1285 550 Sender verify failed
1287 where the first response line was missing the '-' that indicates it is not
1288 the final line of the response.
129031. The loop for finding the name of the user that called Exim had a hardwired
1291 limit of 10; it now uses the value of finduser_retries, which is used for
1292 all other user lookups.
129432. Added $received_count variable, available in data and not_smtp ACLs, and at
1295 delivery time.
129733. Exim was neglecting to zero errno before one call of strtol() when
1298 expanding a string and expecting an integer value. On some systems this
1299 resulted in spurious "integer overflow" errors. Also, it was casting the
1300 result into an int without checking.
130234. Testing for a connection timeout using "timeout_connect" in the retry rules
1303 did not work. The code looks as if it has *never* worked, though it appears
1304 to have been documented since at least releast 1.62. I have made it work.
130635. The "timeout_DNS" error in retry rules, also documented since at least
1307 1.62, also never worked. As it isn't clear exactly what this means, and
1308 clearly it isn't a major issue, I have abolished the feature by treating it
1309 as "timeout", and writing a warning to the main and panic logs.
131136. The display of retry rules for -brt wasn't always showing the error code
1312 correctly.
131437. Added new error conditions to retry rules: timeout_A, timeout_MX,
1315 timeout_connect_A, timeout_connect_MX.
131738. Rewriting the envelope sender at SMTP time did not allow it to be rewritten
1318 to the empty sender.
132039. The daemon was not analysing the content of -oX till after it had closed
1321 stderr and disconnected from the controlling terminal. This meant that any
1322 syntax errors were only noted on the panic log, and the return code from
1323 the command was 0. By re-arranging the code a little, I've made the
1324 decoding happen first, so such errors now appear on stderr, and the return
1325 code is 1. However, the actual setting up of the sockets still happens in
1326 the disconnected process, so errors there are still only recorded on the
1327 panic log.
132940. A daemon listener on a wildcard IPv6 socket that also accepts IPv4
1330 connections (as happens on some IP stacks) was logged at start up time as
1331 just listening for IPv6. It now logs "IPv6 with IPv4". This differentiates
1332 it from "IPv6 and IPv4", which means that two separate sockets are being
1333 used.
133541. The debug output for gethostbyname2() or getipnodebyname() failures now
1336 says whether AF_INET or AF_INET6 was passed as an argument.
133842. Exiwhat output was messed up when time zones were included in log
1339 timestamps.
134143. Exiwhat now gives more information about the daemon's listening ports,
1342 and whether -tls-on-connect was used.
134444. The "port" option of the smtp transport is now expanded.
134645. A "message" modifier in a "warn" statement in a non-message ACL was being
1347 silently ignored. Now an error message is written to the main and panic
1348 logs.
135046. There's a new ACL modifier called "logwrite" which writes to a log file
1351 as soon as it is encountered.
135347. Added $local_user_uid and $local_user_gid at routing time.
135548. Exim crashed when trying to verify a sender address that was being
1356 rewritten to "<>".
135849. Exim was recognizing only a space character after ".include". It now also
1359 recognizes a tab character.
136150. Fixed several bugs in the Perl script that creates the exim.8 man page by
1362 extracting the relevant information from the specification. The man page no
1363 longer contains scrambled data for the -d option, and I've added a section
1364 at the front about calling Exim under different names.
136651. Added "extra_headers" argument to the "mail" command in filter files.
136852. Redirecting mail to an unqualified address in a Sieve filter caused Exim to
1369 crash.
137153. Installed eximstats 1.29.
137354. Added transport_filter_timeout as a generic transport option.
137555. Exim no longer adds an empty Bcc: header to messages that have no To: or
1376 Cc: header lines. This was required by RFC 822, but it not required by RFC
1377 2822.
137956. Exim used to add From:, Date:, and Message-Id: header lines to any
1380 incoming messages that did not have them. Now it does so only if the
1381 message originates locally, that is, if there is no associated remote host
1382 address. When Resent- header lines are present, this applies to the Resent-
1383 lines rather than the non-Resent- lines.
138557. Drop incoming SMTP connection after too many syntax or protocol errors. The
1386 limit is controlled by smtp_max_synprot_errors, defaulting to 3.
138858. Messages for configuration errors now include the name of the main
1389 configuration file - useful now that there may be more than one file in a
1390 list (.included file names were always shown).
139259. Change 4.21/82 (run initgroups() when starting the daemon) causes problems
1393 for those rare installations that do not start the daemon as root or run it
1394 setuid root. I've cut out the call to initgroups() if the daemon is not
1395 root at that time.
139760. The Exim user and group can now be bound into the binary as text strings
1398 that are looked up at the start of Exim's processing.
140061. Applied a small patch for the Interbase code, supplied by Ard Biesheuvel.
140262. Added $mailstore_basename variable.
140463. Installed patch to sieve.c from Michael Haardt.
140664. When Exim failed to open the panic log after failing to open the main log,
1407 the original message it was trying to log was written to stderr and debug
1408 output, but if they were not available (the usual case in production), it
1409 was lost. Now it is written to syslog before the two lines that record the
1410 failures to open the logs.
141265. Users' Exim filters run in subprocesses under the user's uid. It is
1413 possible for a "deliver" command or an alias in a "personal" command to
1414 provoke an address rewrite. If logging of address rewriting is configured,
1415 this fails because the process is not running as root or exim. There may be
1416 a better way of dealing with this, but for the moment (because 4.30 needs
1417 to be released), I have disabled address rewrite logging when running a
1418 filter in a non-root, non-exim process.
1421Exim version 4.24
1424 1. The buildconfig auxiliary program wasn't quoting the value set for
1425 HEADERS_CHARSET. This caused a compilation error complaining that 'ISO' was
1426 not defined. This bug was masked in 4.22 by the effect that was fixed in
1427 change 4.23/1.
1429 2. Some messages that were rejected after a message id was allocated were
1430 shown as "incomplete" by exigrep. It no longer does this for messages that
1431 are rejected by local_scan() or the DATA or non-SMTP ACLs.
1433 3. If a Message-ID: header used a domain literal in the ID, and Exim did not
1434 have allow_domain_literals set, the ID did not get logged in the <= line.
1435 Domain literals are now always recognized in Message-ID: header lines.
1437 4. The first argument for a ${extract expansion item is the key name or field
1438 number. Leading and trailing spaces in this item were not being ignored,
1439 causing some misleading effects.
1441 5. When deliver_drop_privilege was set, single queue runner processes started
1442 manually (i.e. by the command "exim -q") or by the daemon (which uses the
1443 same command in the process it spins off) were not dropping privilege.
1445 6. When the daemon running as "exim" started a queue runner, it always
1446 re-executed Exim in the spun-off process. This is a waste of effort when
1447 deliver_drop_privilege is set. The new process now just calls the
1448 queue-runner function directly.
1451Exim version 4.23
1454 1. Typo in the src/EDITME file: it referred to HEADERS_DECODE_TO instead of
1457 2. Change 4.21/73 introduced a bug. The pid file path set by -oP was being
1458 ignored. Though the use of -oP was forcing the writing of a pid file, it
1459 was always written to the default place.
1461 3. If the message "no IP address found for host xxxx" is generated during
1462 incoming verification, it is now followed by identification of the incoming
1463 connection (so you can more easily find what provoked it).
1465 4. Bug fix for Sieve filters: "stop" inside a block was not working properly.
1467 5. Added some features to "harden" Exim a bit more against certain attacks:
1469 (a) There is now a build-time option called FIXED_NEVER_USERS that can
1470 be put in Local/Makefile. This is like the never_users runtime option,
1471 but it cannot be overridden. The default setting is "root".
1473 (b) If ALT_CONFIG_PREFIX is defined in Local/Makefile, it specifies a
1474 prefix string with which any file named in a -C command line option
1475 must start.
1477 (c) If ALT_CONFIG_ROOT_ONLY is defined in Local/Makefile, root privilege
1478 is retained for -C and -D only if the caller of Exim is root. Without
1479 it, the exim user may also use -C and -D and retain privilege.
1481 (d) If DISABLE_D_OPTION is defined in Local/Makefile, the use of the -D
1482 command line option is disabled.
1484 6. Macro names set by the -D option must start with an upper case letter, just
1485 like macro names defined in the configuration file.
1487 7. Added "dereference=" facility to LDAP.
1489 8. Two instances of the typo "uknown" in the source files are fixed.
1491 9. If a PERL_COMMAND setting in Local/Makefile was not at the start of a line,
1492 the Configure-Makefile script screwed up while processing it.
149410. Incorporated PCRE 4.4.
149611. The SMTP synchronization check was not operating right at the start of an
1497 SMTP session. For example, it could not catch a HELO sent before the client
1498 waited for the greeting. There is now a check for outstanding input at the
1499 point when the greeting is written. Because of the duplex, asynchronous
1500 nature of TCP/IP, it cannot be perfect - the incorrect input may be on its
1501 way, but not yet received, when the check is performed.
150312. Added tcp_nodelay to make it possible to turn of the setting of TCP_NODELAY
1504 on TCP/IP sockets, because this apparently causes some broken clients to
1505 timeout.
150713. Installed revised OS/Makefile-CYGWIN and OS/os.c-cygwin (the .h file was
1508 unchanged) from the Cygwin maintainer.
151014. The code for -bV that shows what is in the binary showed "mbx" when maildir
1511 was supported instead of testing for mbx. Effectively a typo.
151315. The spa authenticator server code was not checking that the input it
1514 received was valid base64.
151616. The debug output line for the "set" modifier in ACLs was not showing the
1517 name of the variable that was being set.
151917. Code tidy: the variable type "vtype_string" was never used. Removed it.
152118. Previously, a reference to $sender_host_name did not cause a DNS reverse
1522 lookup on its own. Something else was needed to trigger the lookup. For
1523 example, a match in host_lookup or the need for a host name in a host list.
1524 Now, if $sender_host_name is referenced and the host name has not yet been
1525 looked up, a lookup is performed. If the lookup fails, the variable remains
1526 empty, and $host_lookup_failed is set to "1".
152819. Added "eqi" as a case-independent comparison operator.
153020. The saslauthd authentication condition could segfault if neither service
1531 nor realm was specified.
153321. If an overflowing value such as "2048M" was set for message_size_limit, the
1534 error message that was logged was misleading, and incoming SMTP
1535 connections were dropped. The message is now more accurate, and temporary
1536 errors are given to SMTP connections.
153822. In some error situations (such as 21 above) Exim rejects all SMTP commands
1539 (except RSET) with a 421 error, until QUIT is received. However, it was
1540 failing to send a response to QUIT.
154223. The HELO ACL was being run before the code for helo_try_verify_hosts,
1543 which made it impossible to use "verify = helo" in the HELO ACL. The HELO
1544 ACL is now run after the helo_try_verify_hosts code.
154624. "{MD5}" and "{SHA1}" are now recognized as equivalent to "{md5"} and
1547 "{sha1}" in the "crypteq" expansion condition (in fact the comparison is
1548 case-independent, so other case variants are also recognized). Apparently
1549 some systems use these upper case variants.
155125. If more than two messages were waiting for the same host, and a transport
1552 filter was specified for the transport, Exim sent two messages over the
1553 same TCP/IP connection, and then failed with "socket operation on non-
1554 socket" when it tried to send the third.
155626. Added Exim::debug_write and Exim::log_write for embedded Perl use.
155827. The extern definition of crypt16() in expand.c was not being excluded when
1559 the OS had its own crypt16() function.
156128. Added bounce_return_body as a new option, and bounce_return_size_limit
1562 as a preferred synonym for return_size_limit, both as an option and as an
1563 expansion variable.
156529. Added LIBS=-liconv to OS/Makefile-OSF1.
156730. Changed the default configuration ACL to relax the local part checking rule
1568 for addresses that are not in any local domains. For these addresses,
1569 slashes and pipe symbols are allowed within local parts, but the sequence
1570 /../ is explicitly forbidden.
157231. SPA server authentication was not clearing the challenge buffer before
1573 using it.
157532. log_message in a "warn" ACL statement was writing to the reject log as
1576 well as to the main log, which contradicts the documentation and doesn't
1577 seem right (because no rejection is happening). So I have stopped it.
157933. Added Ard Biesheuvel's lookup code for accessing an Interbase database.
1580 However, I am unable to do any testing of this.
158234. Fixed an infelicity in the appendfile transport. When checking directories
1583 for a mailbox, to see if any needed to be created, it was accidentally
1584 using path names with one or more superfluous leading slashes; tracing
1585 would show up entries such as stat("///home/ph10", 0xFFBEEA48).
158735. If log_message is set on a "discard" verb in a MAIL or RCPT ACL, its
1588 contents are added to the log line that is written for every discarded
1589 recipient. (Previously a log_message setting was ignored.)
159136. The ${quote: operator now quotes the string if it is empty.
159337. The install script runs exim in order to find its version number. If for
1594 some reason other than non-existence or emptiness, which it checks, it
1595 could not run './exim', it was installing it with an empty version number,
1596 i.e. as "exim-". This error state is now caught, and the installation is
1597 aborted.
159938. An argument was missing from the function that creates an error message
1600 when Exim fails to connect to the socket for saslauthd authentication.
1601 This could cause Exim to crash, or give a corrupted message.
160339. Added isip, isip4, and isip6 to ${if conditions.
160540. The ACL variables $acl_xx are now saved with the message, and can be
1606 accessed later in routers, transports, and filters.
160841. The new lookup type nwildlsearch is like wildlsearch, except that the key
1609 strings in the file are not string-expanded.
161142. If a MAIL command specified a SIZE value that was too large to fit into an
1612 int variable, the check against message_size_limit failed. Such values are
1613 now forced to INT_MAX, which is around 2Gb for a 32-bit variable. Maybe one
1614 day this will have to be increased, but I don't think I want to be around
1615 when emails are that large.
1619Exim version 4.22
1622 1. Removed HAVE_ICONV=yes from OS/Makefile-FreeBSD, since it seems that
1623 iconv() is not standard in FreeBSD.
1625 2. Change 4.21/17 was buggy and could cause stack overwriting on a system with
1626 IPv6 enabled. The observed symptom was a segmentation fault on return from
1627 the function os_common_find_running_interfaces() in src/os.c.
1629 3. In the check_special_case() function in daemon.c I had used "errno" as an
1630 argument name, which causes warnings on some systems. This was basically a
1631 typo, since it was named "eno" in the comments!
1633 4. The code that waits for the clock to tick (at a resolution of some fraction
1634 of a second) so as to ensure message-id uniqueness was always waiting for
1635 at least one whole tick, when it could have waited for less. [This is
1636 almost certainly not relevant at current processor speeds, where it is
1637 unlikely to ever wait at all. But we try to future-proof.]
1639 5. The function that sleeps for a time interval that includes fractions of a
1640 second contained a race. It did not block SIGALRM between setting the
1641 timer, and suspending (a couple of lines later). If the interval was short
1642 and the sigsuspend() was delayed until after it had expired, the suspension
1643 never ended. On busy systems this could lead to processes getting stuck for
1644 ever.
1646 6. Some uncommon configurations may cause a lookup to happen in a queue runner
1647 process, before it forks any delivery processes. The open lookup caching
1648 mechanism meant that the open file or database connection was passed into
1649 the delivery process. The problem was that delivery processes always tidy
1650 up cached lookup data. This could cause a problem for the next delivery
1651 process started by the queue runner, because the external queue runner
1652 process does not know about the closure. So the next delivery process
1653 still has data in the lookup cache. In the case of a file lookup, there was
1654 no problem because closing a file descriptor in a subprocess doesn't affect
1655 the parent. However, if the lookup was caching a connection to a database,
1656 the connection was closed, and the second delivery process was likely to
1657 see errors such as "PGSQL: query failed: server closed the connection
1658 unexpectedly". The problem has been fixed by closing all cached lookups
1659 in a queue runner before running a delivery process.
1661 7. Compiler warning on Linux for the second argument of iconv(), which doesn't
1662 seem to have the "const" qualifier which it has on other OS. I've
1663 parameterised it.
1665 8. Change 4.21/2 was too strict. It is only if there are two authenticators
1666 *of the same type* (client or server) with the same public name that an
1667 error should be diagnosed.
1669 9. When Exim looked up a host name for an IP address, but failed to find the
1670 original IP address when looking up the host name (a safety check), it
1671 output the message "<ip address> does not match any IP for NULL", which was
1672 confusing, to say the least. The bug was that the host name should have
1673 appeared instead of "NULL".
167510. Since release 3.03, if Exim is called by a uid other than root or the Exim
1676 user that is built into the binary, and the -C or -D options is used, root
1677 privilege is dropped before the configuration file is read. In addition,
1678 logging is switched to stderr instead of the normal log files. If the
1679 configuration then re-defines the Exim user, the unprivileged environment
1680 is probably not what is expected, so Exim logs a panic warning message (but
1681 proceeds).
1683 However, if deliver_drop_privilege is set, the unprivileged state may well
1684 be exactly what is intended, so the warning has been cut out in that case,
1685 and Exim is allowed to try to write to its normal log files.
1688Exim version 4.21
1691 1. smtp_return_error_details was not giving details for temporary sender
1692 or receiver verification errors.
1694 2. Diagnose a configuration error if two authenticators have the same public
1695 name.
1697 3. Exim used not to create the message log file for a message until the first
1698 delivery attempt. This could be confusing when incoming messages were held
1699 for policy or load reasons. The message log file is now created at the time
1700 the message is received, and an initial "Received" line is written to it.
1702 4. The automatically generated man page for command line options had a minor
1703 bug that caused no ill effects; however, a more serious problem was that
1704 the procedure for building the man page automatically didn't always
1705 operate. Consequently, release 4.20 contains an out-of-date version. This
1706 shouldn't happen again.
1708 5. When building Exim with embedded Perl support, the script that builds the
1709 Makefile was calling 'perl' to find its compile-time parameters, ignoring
1710 any setting of PERL_COMMAND in Local/Makefile. This is now fixed.
1712 6. The freeze_tell option was not being used for messages that were frozen on
1713 arrival, either by an ACL or by local_scan().
1715 7. Added the smtp_incomplete_transaction log selector.
1717 8. After STARTTLS, Exim was not forgetting that it had advertised AUTH, so it
1718 was accepting AUTH without a new EHLO.
1720 9. Added tls_remember_esmtp to cope with YAEB. This allows AUTH and other
1721 ESMTP extensions after STARTTLS without a new EHLO, in contravention of the
1722 RFC.
172410. Logging of TCP/IP connections (when configured) now happens in the main
1725 daemon process instead of the child process, so that the TCP/IP connection
1726 count is more accurate (but it can never be perfect).
172811. The use of "drop" in a nested ACL was not being handled correctly in the
1729 outer ACL. Now, if condition failure induced by the nested "drop" causes
1730 the outer ACL verb to deny access ("accept" or "discard" after "endpass",
1731 or "require"), the connection is dropped.
173312. Similarly, "discard" in a nested ACL wasn't being handled. A nested ACL
1734 that yield "discard" can now be used with an "accept" or a "discard" verb,
1735 but an error is generated for any others (because I can't see a useful way
1736 to define what should happen).
173813. When an ACL is read dynamically from a file (or anywhere else), the lines
1739 are now processed in the same way as lines in the Exim configuration file.
1740 In particular, continuation lines are supported.
174214. Added the "dnslists = a.b.c!=n.n.n.n" feature.
174415. Added -ti meaning -t -i.
174616. Check for letters, digits, hyphens, and dots in the names of dnslist
1747 domains, and warn by logging if others are found.
174917. At least on BSD, alignment is not guarenteed for the array of ifreq's
1750 returned from GIFCONF when Exim is trying to find the list of interfaces on
1751 a host. The code in os.c has been modified to copy each ifreq to an aligned
1752 structure in all cases.
1754 Also, in some cases, the returned ifreq's were being copied to a 'struct
1755 ifreq' on the stack, which was subsequently passed to host_ntoa(). That
1756 means the last couple of bytes of an IPv6 address could be chopped if the
1757 ifreq contained only a normal sockaddr (14 bytes storage).
175918. Named domain lists were not supported in the hosts_treat_as_local option.
1760 An entry such as +xxxx was not recognized, and was treated as a literal
1761 domain name.
176319. Ensure that header lines added by a DATA ACL are included in the reject log
1764 if the ACL subsequently rejects the message.
176620. Upgrade the cramtest.pl utility script to use Digest::MD5 instead of just
1767 MD5 (which is deprecated).
176921. When testing a filter file using -bf, Exim was writing a message when it
1770 took the sender from a "From " line in the message, but it was not doing so
1771 when it took $return_path from a Return-Path: header line. It now does.
177322. If the contents of a "message" modifier for a "warn" ACL verb do not begin
1774 with a valid header line field name (a series of printing characters
1775 terminated by a colon, Exim now inserts X-ACL-Warn: at the beginning.
177723. Changed "disc" in the source to "disk" to conform to the documentation and
1778 the book and for uniformity.
178024. Ignore Sendmail's -Ooption=value command line item.
178225. When execve() failed while trying to run a command in a pipe transport,
1783 Exim was returning EX_UNAVAILBLE (69) from the subprocess. However, this
1784 could be confused with a return value of 69 from the command itself. This
1785 has been changed to 127, the value the shell returns if it is asked to run
1786 a non-existent command. The wording for the related log line suggests a
1787 non-existent command as the problem.
178926. If received_header_text expands to an empty string, do not add a Received:
1790 header line to the message. (Well, it adds a token one on the spool, but
1791 marks it "old" so that it doesn't get used or transmitted.)
179327. Installed eximstats 1.28 (addition of -nt option).
179528. There was no check for failure on the call to getsockname() in the daemon
1796 code. This can fail if there is a shortage of resources on the system, with
1797 ENOMEM, for example. A temporary error is now given on failure.
179929. Contrary to the C standard, it seems that in some environments, the
1800 equivalent of setlocale(LC_ALL, "C") is not obeyed at the start of a C
1801 program. Exim now does this explicitly; it affects the formatting of
1802 timestamps using strftime().
180430. If exiqsumm was given junk data, it threw up some uninitialized variable
1805 complaints. I've now initialized all the variables, to avoid this.
180732. Header lines added by a system filter were not being "seen" during
1808 transport-time rewrites.
181033. The info_callback() function passed to OpenSSL is set up with type void
1811 (*)(SSL *, int, int), as described somewhere. However, when calling the
1812 function (actually a macro) that sets it up, the type void(*)() is
1813 expected. I've put in a cast to prevent warnings from picky compilers.
181534. If a DNS black list lookup found a CNAME record, but there were no A
1816 records associated with the domain it pointed at, Exim crashed.
181835. If a DNS black list lookup returned more than one A record, Exim ignored
1819 all but the first. It now scans all returned addresses if a particular IP
1820 value is being sought. In this situation, the contents of the
1821 $dnslist_value variable are a list of all the addresses, separated by a
1822 comma and a space.
182436. Tightened up the rules for host name lookups using reverse DNS. Exim used
1825 to accept a host name and all its aliases if the forward lookup for any of
1826 them yielded the IP address of the incoming connection. Now it accepts only
1827 those names whose forward lookup yields the correct IP address. Any other
1828 names are discarded. This closes a loophole whereby a rogue DNS
1829 administrator could create reverse DNS records to break through a
1830 wildcarded host restriction in an ACL.
183237. If a user filter or a system filter that ran in a subprocess used any of
1833 the numerical variables ($1, $2 etc), or $thisaddress, in a pipe command,
1834 the wrong values were passed to the pipe command ($thisaddress had the
1835 value of $0, $0 had the value of $1, etc). This bug was introduced by
1836 change 4.11/101, and not discovered because I wrote an inadequate test. :-(
183838. Improved the line breaking for long SMTP error messages from ACLs.
1839 Previously, if there was no break point between 40 and 75 characters, Exim
1840 left the rest of the message alone. Two changes have been made: (a) I've
1841 reduced the minimum length to 35 characters; (b) if it can't find a break
1842 point between 35 and 75 characters, it looks ahead and uses the first one
1843 that it finds. This may give the occasional overlong line, but at least the
1844 remaining text gets split now.
184639. Change 82 of 4.11 was unimaginative. It assumed the limit on the number of
1847 file descriptors might be low, and that setting 1000 would always raise it.
1848 It turns out that in some environments, the limit is already over 1000 and
1849 that lowering it causes trouble. So now Exim takes care not to decrease it.
185140. When delivering a message, the value of $return_path is set to $sender_
1852 address at the start of routing (routers may change the value). By an
1853 oversight, this default was not being set up when an address was tested by
1854 -bt or -bv, which affected the outcome if any router or filter referred to
1855 $return_path.
185741. The idea of the "warn" ACL verb is that it adds a header or writes to the
1858 log only when "message" or "log_message" are set. However, if one of the
1859 conditions was an address verification, or a call to a nested ACL, the
1860 messages generated by the underlying test were being passed through. This
1861 no longer happens. The underlying message is available in $acl_verify_
1862 message for both "message" and "log_message" expansions, so it can be
1863 passed through if needed.
186542. Added RFC 2047 interpretation of header lines for $h_ expansions, with a
1866 new expansion $bh_ to give the encoded byte string without charset
1867 translation. Translation happens only if iconv() is available; HAVE_ICONV
1868 indicates this at build time. HEADERS_CHARSET gives the charset to
1869 translate to; headers_charset can change it in the configuration, and
1870 "headers charset" can change it in an individual filter file.
187243. Now that we have a default RFC 2047 charset (see above), the code in Exim
1873 that creates RFC 2047 encoded "words" labels them as that charset instead
1874 of always using iso-8859-1. The cases are (i) the explicit ${rfc2047:
1875 expansion operator; (ii) when Exim creates a From: line for a local
1876 message; (iii) when a header line is rewritten to include a "phrase" part.
187844. Nasty bug in exiqsumm: the regex to skip already-delivered addresses was
1879 buggy, causing it to skip the first lines of messages whose message ID
1880 ended in 'D'. This would not have bitten before Exim release 4.14, because
1881 message IDs were unlikely to end in 'D' before then. The effect was to have
1882 incorrect size information for certain domains.
188445. #include "config.h" was missing at the start of the crypt16.c module. This
1885 caused trouble on Tru64 (aka OSF1) systems, because HAVE_CRYPT16 was not
1886 noticed.
188846. If there was a timeout during a "random" callout check, Exim treated it as
1889 a failure of the random address, and carried on sending RSET and the real
1890 address. If the delay was just some slowness somewhere, the response to the
1891 original RCPT would be taken as a response to RSET and so on, causing
1892 mayhem of various kinds.
189447. Change 50 for 4.20 was a heap of junk. I don't know what I was thinking
1895 when I implemented it. It didn't allow for the fact that some option values
1896 may legitimatetly be negative (e.g. size_addition), and it didn't even do
1897 the right test for positive values.
189948. Domain names in DNS records are case-independent. Exim always looks them up
1900 in lower case. Some resolvers return domain names in exactly the case they
1901 appear in the zone file, that is, they may contain uppercase letters. Not
1902 all resolvers do this - some return always lower case. Exim was treating a
1903 change of case by a resolver as a change of domain, similar to a widening
1904 of a domain abbreviation. This triggered its re-routing code and so it was
1905 trying to route what was effectively the same domain again. This normally
1906 caused routing to fail (because the router wouldn't handle the domain
1907 twice). Now Exim checks for this case specially, and just changes the
1908 casing of the domain that it ultimately uses when it transmits the message
1909 envelope.
191149. Added Sieve (RFC 3028) support, courtesy of Michael Haardt's contributed
1912 module.
191450. If a filter generated a file delivery with a non-absolute name (possible if
1915 no home directory exists for the router), the forbid_file option was not
1916 forbidding it.
191851. Added '&' feature to dnslists, to provide bit mask matching in addition to
1919 the existing equality matching.
192152. Exim was using ints instead of ino_t variables in some places where it was
1922 dealing with inode numbers.
192453. If TMPDIR is defined in Local/Makefile (default in src/EDITME is
1925 TMPDIR="/tmp"), Exim checks for the presence of an environment variable
1926 called TMPDIR, and if it finds it is different, it changes its value.
192854. The smtp_printf() function is now made available to local_scan() so
1929 additional output lines can be written before returning. There is also an
1930 smtp_fflush() function to enable the detection of a dropped connection.
1931 The variables smtp_input and smtp_batched_input are exported to
1932 local_scan().
193455. Changed the default runtime configuration: the message "Unknown user"
1935 has been removed from the ACL, and instead placed on the localuser router,
1936 using the cannot_route_message feature. This means that any verification
1937 failures that generate their own messages won't get overridden. Similarly,
1938 the "Unrouteable address" message that was in the ACL for unverifiable
1939 relay addresses has also been removed.
194156. Added hosts_avoid_esmtp to the smtp transport.
194357. The exicyclog script was not checking for the esoteric option
1944 CONFIGURE_FILE_USE_EUID in the Local/Makefile. It now does this, but it
1945 will work only if exicyclog is run under the appropriate euid.
194758. Following a discussion on the list, the rules by which Exim recognises line
1948 endings on incoming messages have been changed. The -dropcr and drop_cr
1949 options are now no-ops, retained only for backwards compatibility. The
1950 following line terminators are recognized: LF CRLF CR. However, special
1951 processing applies to CR:
1953 (i) The sequence CR . CR does *not* terminate an incoming SMTP message,
1954 nor a local message in the state where . is a terminator.
1956 (ii) If a bare CR is encountered in a header line, an extra space is added
1957 after the line terminator so as not to end the header. The reasoning
1958 behind this is that bare CRs in header lines are most likely either
1959 to be mistakes, or people trying to play silly games.
196159. The size of a message, as listed by "-bp" or in the Exim monitor window,
1962 was being incorrectly given as 18 bytes larger than it should have been.
1963 This is a VOB (very old bug).
196560. This may never have affected anything current, but just in case it has:
1966 When the local host is found other than at the start of a list of hosts,
1967 the local host, those with the same MX, and any that follow, are discarded.
1968 When the list in question was part of a longer list of hosts, the following
1969 hosts (not currently being processed) were also being discarded. This no
1970 longer happens. I'm not sure if this situation could ever has previously
1971 arisen.
197361. Added the "/MX" feature to lists of hosts in the manualroute and query
1974 program routers.
197662. Whenever Exim generates a new message, it now adds an Auto-Submitted:
1977 header. This is something that is recommended in a new Internet Draft, and
1978 is something that is documented as being done by Sendmail. There are two
1979 possible values. For messages generated by the autoreply transport, Exim
1980 adds:
1982 Auto-Submitted: auto-replied
1984 whereas for all other generated messages (e.g. bounces) it adds
1986 Auto-Submitted: auto-generated
198863. The "personal" condition in filters now includes a test for the
1989 Auto-Submitted: header. If it contains the string "auto-" the message it
1990 not considered personal.
199264. Added rcpt_include_affixes as a generic transport option.
199465. Added queue_only_override (default true).
199666. Added the syslog_duplication option.
199867. If what should have been the first header line of a message consisted of
1999 a space followed by a colon, Exim was mis-interpreting it as a header line.
2000 It isn't of course - it is syntactically invalid and should therefore be
2001 treated as the start of the message body. The misbehaviour could have
2002 caused a number of strange effects, including loss of data in subsequent
2003 header lines, and spool format errors.
200568. Formerly, the AUTH parameter on a MAIL command was trusted only if the
2006 client host had authenticated. This control can now be exercised by an ACL
2007 for more flexibility.
200969. By default, callouts do not happen when testing with -bh. There is now a
2010 variant, -bhc, which does actually run the callout code, including
2011 consulting and updating the callout cache.
201370. Added support for saslauthd authentication, courtesy of Alexander
2014 Sabourenkov.
201671. If statvfs() failed on the spool or log directories while checking their
2017 size for availability, Exim confusingly gave the error "space shortage".
2018 Furthermore, in debugging mode it crashed with a floating point exception.
2019 These checks are done if check_{spool,log}_{space,inodes} are set, and when
2020 an SMTP message arrives with SIZE= on the MAIL command. As this is a really
2021 serious problem, Exim now writes to the main and panic logs when this
2022 happens, with details of the failure. It then refuses to accept the
2023 incoming message, giving the message "spool directory problem" or "log
2024 directory problem" with a 421 code for SMTP messages.
202672. When Exim is about to re-exec itself, it ensures that the file descriptors
2027 0, 1, and 2 exist, because some OS complain for execs without them (see
2028 ChangeLog 4.05/30). If necessary, Exim opens /dev/null to use for these
2029 descriptors. However, the code omitted to check that the open succeeded,
2030 causing mysterious errors if for some reason the permissions on /dev/null
2031 got screwed. Now Exim writes a message to the main and panic logs, and
2032 bombs out if it can't open /dev/null.
203473. Re-vamped the way daemon_smtp_port, local_interfaces, and -oX work and
2035 interact so that it is all more flexible. It is supposed to remain
2036 backwards compatible. Also added extra_local_interfaces.
203874. Invalid data sent to a SPA (NTLM) server authenticator could cause the code
2039 to bomb out with an assertion failure - to the client this appears as a
2040 connection drop. This problem occurs in the part of the code that was taken
2041 from the Samba project. Fortunately, the assertion is in a very simple
2042 function, so I have fixed this by reproducing the function inline in the
2043 one place where it is called, and arranging for authentication to fail
2044 instead of killing the process with assert().
204675. The SPA client code was not working when the server requested OEM rather
2047 than Unicode encoding.
204976. Added code to make require_files with a specific uid setting more usable in
2050 the case where statting the file as root fails - usually a non-root-mounted
2051 NFS file system. When this happens and the failure is EACCES, Exim now
2052 forks a subprocess and does the per-uid checking as the relevant uid.
205477. Added process_log_path.
205678. If log_file_path was not explicitly set, a setting of check_log_space or
2057 check_log_inodes was ignored.
205979. If a space check for the spool or log partitions fails, the incident is now
2060 logged. Of course, in the latter case the data may get lost...
206280. Added the %p formatting code to string_format() so that it can be used to
2063 print addresses in debug_print(). Adjusted all the address printing in the
2064 debugging in store.c to use %p rather than %d.
206681. There was a concern that a line of code in smtp_in.c could overflow a
2067 buffer if a HELO/EHLO command was given followed by 500 or so spaces. As
2068 initially expressed, the concern was not well-founded, because trailing
2069 spaces are removed early. However, if the trailing spaces were followed by
2070 a NULL, they did not get removed, so the overflow was possible. Two fixes
2071 were applied:
2073 (a) I re-wrote the offending code in a cleaner fashion.
2074 (b) If an incoming SMTP command contains a NULL character, it is rejected
2075 as invalid.
207782. When Exim changes uid/gid to the Exim user at daemon start time, it now
2078 runs initgroups(), so that if the Exim user is in any additional groups,
2079 they will be used during message reception.
2082Exim version 4.20
2085The change log for 4.20 and earlier releases has been archived.