1 Change log file for Exim from version 4.21
2 -------------------------------------------
8 TF/01 Correctly close the server side of TLS when forking for delivery.
10 When a message was received over SMTP with TLS, Exim failed to clear up
11 the incoming connection properly after forking off the child process to
12 deliver the message. In some situations the subsequent outgoing
13 delivery connection happened to have the same fd number as the incoming
14 connection previously had. Exim would try to use TLS and fail, logging
15 a "Bad file descriptor" error.
17 TF/02 Portability fix for building lookup modules on Solaris when the xpg4
18 utilities have not been installed.
20 JH/01 Fix memory-handling in use of acl as a conditional; avoid free of
21 temporary space as the ACL may create new global variables.
23 TL/01 LDAP support uses per connection or global context settings, depending
24 upon the detected version of the libraries at build time.
26 TL/02 Experimental Proxy Protocol support: allows a proxied SMTP connection
27 to extract and use the src ip:port in logging and expansions as if it
28 were a direct connection from the outside internet.
30 JH/02 Add ${listextract {number}{list}{success}{fail}}.
32 TL/03 Bugzilla 1433: Fix DMARC SEGV with specific From header contents.
33 Properly escape header and check for NULL return.
35 PP/01 Continue incomplete 4.82 PP/19 by fixing docs too: use dns_dnssec_ok
38 JH/03 Bugzilla 1157: support log_selector smtp_confirmation for lmtp.
40 TL/04 Add verify = header_names_ascii check to reject email with non-ASCII
41 characters in header names, implemented as a verify condition.
42 Contributed by Michael Fischer v. Mollard.
44 TL/05 Rename SPF condition results err_perm and err_temp to standardized
45 results permerror and temperror. Previous values are deprecated but
46 still accepted. In a future release, err_perm and err_temp will be
47 completely removed, which will be a backward incompatibility if the
48 ACL tests for either of these two old results. Patch contributed by
49 user bes-internal on the mailing list.
51 JH/04 Add ${utf8clean:} operator. Contributed by Alex Rau.
53 JH/05 Bugzilla 305: Log incoming-TLS details on rejects, subject to log
54 selectors, in both main and reject logs.
56 JH/06 Log outbound-TLS and port details, subject to log selectors, for a
59 JH/07 Add malware type "sock" for talking to simple daemon.
61 JH/08 Bugzilla 1371: Add tls_{,try_}verify_hosts to smtp transport.
63 JH/09 Bugzilla 1431: Support (with limitations) headers_add/headers_remove in
64 routers/transports under cutthrough routing.
66 JH/10 Bugzilla 1005: ACL "condition =" should accept values which are negative
67 numbers. Touch up "bool" conditional to keep the same definition.
69 TL/06 Remove duplicated language in spec file from 4.82 TL/16.
71 JH/11 Add dnsdb tlsa lookup. From Todd Lyons.
73 JH/12 Expand items in router/transport headers_add or headers_remove lists
74 individually rather than the list as a whole. Bug 1452.
76 Required for reasonable handling of multiple headers_ options when
77 they may be empty; requires that headers_remove items with embedded
78 colons must have them doubled (or the list-separator changed).
80 TL/07 Add new dmarc expansion variable $dmarc_domain_policy to directly
81 view the policy declared in the DMARC record. Currently, $dmarc_status
82 is a combined value of both the record presence and the result of the
85 JH/13 Fix handling of $tls_cipher et.al. in (non-verify) transport. Bug 1455.
87 JH/14 New options dnssec_request_domains, dnssec_require_domains on the
88 dnslookup router (applying to the forward lookup).
90 TL/08 Bugzilla 1453: New LDAP "SERVERS=" option allows admin to override list
91 of ldap servers used for a specific lookup. Patch provided by Heiko
97 PP/01 Add -bI: framework, and -bI:sieve for querying sieve capabilities.
99 PP/02 Make -n do something, by making it not do something.
100 When combined with -bP, the name of an option is not output.
102 PP/03 Added tls_dh_min_bits SMTP transport driver option, only honoured
105 PP/04 First step towards DNSSEC, provide $sender_host_dnssec for
106 $sender_host_name and config options to manage this, and basic check
109 PP/05 DSCP support for outbound connections and control modifier for inbound.
111 PP/06 Cyrus SASL: set local and remote IP;port properties for driver.
112 (Only plugin which currently uses this is kerberos4, which nobody should
113 be using, but we should make it available and other future plugins might
114 conceivably use it, even though it would break NAT; stuff *should* be
115 using channel bindings instead).
117 PP/07 Handle "exim -L <tag>" to indicate to use syslog with tag as the process
118 name; added for Sendmail compatibility; requires admin caller.
119 Handle -G as equivalent to "control = suppress_local_fixups" (we used to
120 just ignore it); requires trusted caller.
121 Also parse but ignore: -Ac -Am -X<logfile>
124 TL/01 Bugzilla 1258 - Refactor MAIL FROM optional args processing.
126 TL/02 Add +smtp_confirmation as a default logging option.
128 TL/03 Bugzilla 198 - Implement remove_header ACL modifier.
129 Patch by Magnus Holmgren from 2007-02-20.
131 TL/04 Bugzilla 1281 - Spec typo.
132 Bugzilla 1283 - Spec typo.
133 Bugzilla 1290 - Spec grammar fixes.
135 TL/05 Bugzilla 1285 - Spec omission, fix docbook errors for spec.txt creation.
137 TL/06 Add Experimental DMARC support using libopendmarc libraries.
139 TL/07 Fix an out of order global option causing a segfault. Reported to dev
140 mailing list by by Dmitry Isaikin.
142 JH/01 Bugzilla 1201 & 304 - New cutthrough-delivery feature, with TLS support.
144 JH/02 Support "G" suffix to numbers in ${if comparisons.
146 PP/08 Handle smtp transport tls_sni option forced-fail for OpenSSL.
148 NM/01 Bugzilla 1197 - Spec typo
149 Bugzilla 1196 - Spec examples corrections
151 JH/03 Add expansion operators ${listnamed:name} and ${listcount:string}
153 PP/09 Add gnutls_allow_auto_pkcs11 option (was originally called
154 gnutls_enable_pkcs11, but renamed to more accurately indicate its
157 PP/10 Let Linux makefile inherit CFLAGS/CFLAGS_DYNAMIC.
158 Pulled from Debian 30_dontoverridecflags.dpatch by Andreas Metzler.
160 JH/04 Add expansion item ${acl {name}{arg}...}, expansion condition
161 "acl {{name}{arg}...}", and optional args on acl condition
164 JH/05 Permit multiple router/transport headers_add/remove lines.
166 JH/06 Add dnsdb pseudo-lookup "a+" to do an "aaaa" + "a" combination.
168 JH/07 Avoid using a waiting database for a single-message-only transport.
169 Performance patch from Paul Fisher. Bugzilla 1262.
171 JH/08 Strip leading/trailing newlines from add_header ACL modifier data.
174 JH/09 Add $headers_added variable, with content from use of ACL modifier
175 add_header (but not yet added to the message). Bugzilla 199.
177 JH/10 Add 8bitmime log_selector, for 8bitmime status on the received line.
178 Pulled from Bugzilla 817 by Wolfgang Breyha.
180 PP/11 SECURITY: protect DKIM DNS decoding from remote exploit.
182 (nb: this is the same fix as in Exim 4.80.1)
184 JH/11 Add A= logging on delivery lines, and a client_set_id option on
187 JH/12 Add optional authenticated_sender logging to A= and a log_selector
190 PP/12 Unbreak server_set_id for NTLM/SPA auth, broken by 4.80 PP/29.
192 PP/13 Dovecot auth: log better reason to rejectlog if Dovecot did not
193 advertise SMTP AUTH mechanism to us, instead of a generic
194 protocol violation error. Also, make Exim more robust to bad
195 data from the Dovecot auth socket.
197 TF/01 Fix ultimate retry timeouts for intermittently deliverable recipients.
199 When a queue runner is handling a message, Exim first routes the
200 recipient addresses, during which it prunes them based on the retry
201 hints database. After that it attempts to deliver the message to
202 any remaining recipients. It then updates the hints database using
205 So if a recipient address works intermittently, it can get repeatedly
206 deferred at routing time. The retry hints record remains fresh so the
207 address never reaches the final cutoff time.
209 This is a fairly common occurrence when a user is bumping up against
210 their storage quota. Exim had some logic in its local delivery code
211 to deal with this. However it did not apply to per-recipient defers
212 in remote deliveries, e.g. over LMTP to a separate IMAP message store.
214 This change adds a proper retry rule check during routing so that the
215 final cutoff time is checked against the message's age. We only do
216 this check if there is an address retry record and there is not a
217 domain retry record; this implies that previous attempts to handle
218 the address had the retry_use_local_parts option turned on. We use
219 this as an approximation for the destination being like a local
220 delivery, as in LMTP.
222 I suspect this new check makes the old local delivery cutoff check
223 redundant, but I have not verified this so I left the code in place.
225 TF/02 Correct gecos expansion when From: is a prefix of the username.
227 Test 0254 submits a message to Exim with the header
231 When I ran the test suite under the user fanf2, Exim expanded
232 the header to contain my full name, whereas it should have added
233 a Resent-Sender: header. It erroneously treats any prefix of the
234 username as equal to the username.
236 This change corrects that bug.
238 GF/01 DCC debug and logging tidyup
239 Error conditions log to paniclog rather than rejectlog.
240 Debug lines prefixed by "DCC: " to remove any ambiguity.
242 TF/03 Avoid unnecessary rebuilds of lookup-related code.
244 PP/14 Fix OCSP reinitialisation in SNI handling for Exim/TLS as server.
245 Bug spotted by Jeremy Harris; was flawed since initial commit.
246 Would have resulted in OCSP responses post-SNI triggering an Exim
247 NULL dereference and crash.
249 JH/13 Add $router_name and $transport_name variables. Bugzilla 308.
251 PP/15 Define SIOCGIFCONF_GIVES_ADDR for GNU Hurd.
252 Bug detection, analysis and fix by Samuel Thibault.
253 Bugzilla 1331, Debian bug #698092.
255 SC/01 Update eximstats to watch out for senders sending 'HELO [IpAddr]'
257 JH/14 SMTP PRDR (http://www.eric-a-hall.com/specs/draft-hall-prdr-00.txt).
258 Server implementation by Todd Lyons, client by JH.
259 Only enabled when compiled with EXPERIMENTAL_PRDR. A new
260 config variable "prdr_enable" controls whether the server
261 advertises the facility. If the client requests PRDR a new
262 acl_data_smtp_prdr ACL is called once for each recipient, after
263 the body content is received and before the acl_smtp_data ACL.
264 The client is controlled by bolth of: a hosts_try_prdr option
265 on the smtp transport, and the server advertisement.
266 Default client logging of deliveries and rejections involving
267 PRDR are flagged with the string "PRDR".
269 PP/16 Fix problems caused by timeouts during quit ACLs trying to double
270 fclose(). Diagnosis by Todd Lyons.
272 PP/17 Update configure.default to handle IPv6 localhost better.
273 Patch by Alain Williams (plus minor tweaks).
276 PP/18 OpenSSL made graceful with empty tls_verify_certificates setting.
277 This is now consistent with GnuTLS, and is now documented: the
278 previous undocumented portable approach to treating the option as
279 unset was to force an expansion failure. That still works, and
280 an empty string is now equivalent.
282 PP/19 Renamed DNSSEC-enabling option to "dns_dnssec_ok", to make it
283 clearer that Exim is using the DO (DNSSEC OK) EDNS0 resolver flag,
284 not performing validation itself.
286 PP/20 Added force_command boolean option to pipe transport.
287 Patch from Nick Koston, of cPanel Inc.
289 JH/15 AUTH support on callouts (and hence cutthrough-deliveries).
292 TF/04 Added udpsend ACL modifer and hexquote expansion operator
294 PP/21 Fix eximon continuous updating with timestamped log-files.
295 Broken in a format-string cleanup in 4.80, missed when I repaired the
296 other false fix of the same issue.
297 Report and fix from Heiko Schlichting.
300 PP/22 Guard LDAP TLS usage against Solaris LDAP variant.
301 Report from Prashanth Katuri.
303 PP/23 Support safari_ecdhe_ecdsa_bug for openssl_options.
304 It's SecureTransport, so affects any MacOS clients which use the
305 system-integrated TLS libraries, including email clients.
307 PP/24 Fix segfault from trying to fprintf() to a NULL stdio FILE* if
308 using a MIME ACL for non-SMTP local injection.
309 Report and assistance in diagnosis by Warren Baker.
311 TL/08 Adjust exiqgrep to be case-insensitive for sender/receiver.
313 JH/16 Fix comparisons for 64b. Bugzilla 1385.
315 TL/09 Add expansion variable $authenticated_fail_id to keep track of
316 last id that failed so it may be referenced in subsequent ACL's.
318 TL/10 Bugzilla 1375 - Prevent TLS rebinding in ldap. Patch provided by
321 TL/11 Bugzilla 1382 - Option ldap_require_cert overrides start_tls
322 ldap library initialization, allowing self-signed CA's to be
323 used. Also properly sets require_cert option later in code by
324 using NULL (global ldap config) instead of ldap handle (per
325 session). Bug diagnosis and testing by alxgomz.
327 TL/12 Enhanced documentation in the ratelimit.pl script provided in
328 the src/util/ subdirectory.
330 TL/13 Bug 1301 - Imported transport SQL logging patch from Axel Rau
331 renamed to Transport Post Delivery Action by Jeremy Harris, as
334 TL/14 Bugzilla 1217 - Redis lookup support has been added. It is only enabled
335 when Exim is compiled with EXPERIMENTAL_REDIS. A new config variable
336 redis_servers = needs to be configured which will be used by the redis
337 lookup. Patch from Warren Baker, of The Packet Hub.
339 TL/15 Fix exiqsumm summary for corner case. Patch provided by Richard Hall.
341 TL/16 Bugzilla 1289 - Clarify host/ip processing when have errors looking up a
342 hostname or reverse DNS when processing a host list. Used suggestions
343 from multiple comments on this bug.
345 TL/17 Bugzilla 1057 - Multiple clamd TCP targets patch from Mark Zealey.
347 TL/18 Had previously added a -CONTINUE option to runtest in the test suite.
348 Missed a few lines, added it to make the runtest require no keyboard
351 TL/19 Bugzilla 1402 - Test 533 fails if any part of the path to the test suite
352 contains upper case chars. Make router use caseful_local_part.
354 TL/20 Bugzilla 1400 - Add AVOID_GNUTLS_PKCS11 build option. Allows GnuTLS
355 support when GnuTLS has been built with p11-kit.
361 PP/01 SECURITY: protect DKIM DNS decoding from remote exploit.
363 This, or similar/improved, will also be change PP/11 of 4.82.
369 PP/01 Handle short writes when writing local log-files.
370 In practice, only affects FreeBSD (8 onwards).
371 Bugzilla 1053, with thanks to Dmitry Isaikin.
373 NM/01 Bugzilla 949 - Documentation tweak
375 NM/02 Bugzilla 1093 - eximstats DATA reject detection regexps
378 NM/03 Bugzilla 1169 - primary_hostname spelling was incorrect in docs.
380 PP/02 Implemented gsasl authenticator.
382 PP/03 Implemented heimdal_gssapi authenticator with "server_keytab" option.
384 PP/04 Local/Makefile support for (AUTH|LOOKUP)_*_PC=foo to use
385 `pkg-config foo` for cflags/libs.
387 PP/05 Swapped $auth1/$auth2 for gsasl GSSAPI mechanism, to be more consistent
388 with rest of GSASL and with heimdal_gssapi.
390 PP/06 Local/Makefile support for USE_(GNUTLS|OPENSSL)_PC=foo to use
391 `pkg-config foo` for cflags/libs for the TLS implementation.
393 PP/07 New expansion variable $tls_bits; Cyrus SASL server connection
394 properties get this fed in as external SSF. A number of robustness
395 and debugging improvements to the cyrus_sasl authenticator.
397 PP/08 cyrus_sasl server now expands the server_realm option.
399 PP/09 Bugzilla 1214 - Log authentication information in reject log.
400 Patch by Jeremy Harris.
402 PP/10 Added dbmjz lookup type.
404 PP/11 Let heimdal_gssapi authenticator take a SASL message without an authzid.
406 PP/12 MAIL args handles TAB as well as SP, for better interop with
407 non-compliant senders.
408 Analysis and variant patch by Todd Lyons.
410 NM/04 Bugzilla 1237 - fix cases where printf format usage not indicated
411 Bug report from Lars Müller <lars@samba.org> (via SUSE),
412 Patch from Dirk Mueller <dmueller@suse.com>
414 PP/13 tls_peerdn now print-escaped for spool files.
415 Observed some $tls_peerdn in wild which contained \n, which resulted
416 in spool file corruption.
418 PP/14 TLS fixes for OpenSSL: support TLS 1.1 & 1.2; new "openssl_options"
419 values; set SSL_MODE_AUTO_RETRY so that OpenSSL will retry a read
420 or write after TLS renegotiation, which otherwise led to messages
423 TK/01 Bugzilla 1239 - fix DKIM verification when signature was not inserted
424 as a tracking header (ie: a signed header comes before the signature).
425 Patch from Wolfgang Breyha.
427 JH/01 Bugzilla 660 - Multi-valued attributes from ldap now parseable as a
428 comma-sep list; embedded commas doubled.
430 JH/02 Refactored ACL "verify =" logic to table-driven dispatch.
432 PP/15 LDAP: Check for errors of TLS initialisation, to give correct
434 Report and patch from Dmitry Banschikov.
436 PP/16 Removed "dont_insert_empty_fragments" fron "openssl_options".
437 Removed SSL_clear() after SSL_new() which led to protocol negotiation
438 failures. We appear to now support TLS1.1+ with Exim.
440 PP/17 OpenSSL: new expansion var $tls_sni, which if used in tls_certificate
441 lets Exim select keys and certificates based upon TLS SNI from client.
442 Also option tls_sni on SMTP Transports. Also clear $tls_bits correctly
443 before an outbound SMTP session. New log_selector, +tls_sni.
445 PP/18 Bugzilla 1122 - check localhost_number expansion for failure, avoid
446 NULL dereference. Report and patch from Alun Jones.
448 PP/19 DNS resolver init changes for NetBSD compatibility. (Risk of breakage
449 on less well tested platforms). Obviates NetBSD pkgsrc patch-ac.
450 Not seeing resolver debug output on NetBSD, but suspect this is a
451 resolver implementation change.
453 PP/20 Revert part of NM/04, it broke log_path containing %D expansions.
454 Left warnings. Added "eximon gdb" invocation mode.
456 PP/21 Defaulting "accept_8bitmime" to true, not false.
458 PP/22 Added -bw for inetd wait mode support.
460 PP/23 Added PCRE_CONFIG=yes support to Makefile for using pcre-config to
461 locate the relevant includes and libraries. Made this the default.
463 PP/24 Fixed headers_only on smtp transports (was not sending trailing dot).
464 Bugzilla 1246, report and most of solution from Tomasz Kusy.
466 JH/03 ${eval } now uses 64-bit and supports a "g" suffix (like to "k" and "m").
467 This may cause build issues on older platforms.
469 PP/25 Revamped GnuTLS support, passing tls_require_ciphers to
470 gnutls_priority_init, ignoring Exim options gnutls_require_kx,
471 gnutls_require_mac & gnutls_require_protocols (no longer supported).
472 Added SNI support via GnuTLS too.
473 Made ${randint:..} supplier available, if using not-too-old GnuTLS.
475 PP/26 Added EXPERIMENTAL_OCSP for OpenSSL.
477 PP/27 Applied dnsdb SPF support patch from Janne Snabb.
478 Applied second patch from Janne, implementing suggestion to default
479 multiple-strings-in-record handling to match SPF spec.
481 JH/04 Added expansion variable $tod_epoch_l for a higher-precision time.
483 PP/28 Fix DCC dcc_header content corruption (stack memory referenced,
484 read-only, out of scope).
485 Patch from Wolfgang Breyha, report from Stuart Northfield.
487 PP/29 Fix three issues highlighted by clang analyser static analysis.
488 Only crash-plausible issue would require the Cambridge-specific
489 iplookup router and a misconfiguration.
490 Report from Marcin Mirosław.
492 PP/30 Another attempt to deal with PCRE_PRERELEASE, this one less buggy.
494 PP/31 %D in printf continues to cause issues (-Wformat=security), so for
495 now guard some of the printf checks behind WANT_DEEPER_PRINTF_CHECKS.
496 As part of this, removing so much warning spew let me fix some minor
497 real issues in debug logging.
499 PP/32 GnuTLS was always using default tls_require_ciphers, due to a missing
500 assignment on my part. Fixed.
502 PP/33 Added tls_dh_max_bits option, defaulting to current hard-coded limit
503 of NSS, for GnuTLS/NSS interop. Problem root cause diagnosis by
504 Janne Snabb (who went above and beyond: thank you).
506 PP/34 Validate tls_require_ciphers on startup, since debugging an invalid
507 string otherwise requires a connection and a bunch more work and it's
508 relatively easy to get wrong. Should also expose TLS library linkage
511 PP/35 Pull in <features.h> on Linux, for some portability edge-cases of
512 64-bit ${eval} (JH/03).
514 PP/36 Define _GNU_SOURCE in exim.h; it's needed for some releases of
515 GNU libc to support some of the 64-bit stuff, should not lead to
516 conflicts. Defined before os.h is pulled in, so if a given platform
517 needs to override this, it can.
519 PP/37 Unbreak Cyrus SASL auth: SSF retrieval was incorrect, Exim thought
520 protection layer was required, which is not implemented.
521 Bugzilla 1254, patch from Wolfgang Breyha.
523 PP/38 Overhaul DH prime handling, supply RFC-specified DH primes as built
524 into Exim, default to IKE id 23 from RFC 5114 (2048 bit). Make
525 tls_dhparam take prime identifiers. Also unbreak combination of
526 OpenSSL+DH_params+TLSSNI.
528 PP/39 Disable SSLv2 by default in OpenSSL support.
534 PP/01 Solaris build fix for Oracle's LDAP libraries.
535 Bugzilla 1109, patch from Stephen Usher.
537 TF/01 HP/UX build fix: avoid arithmetic on a void pointer.
539 TK/01 DKIM Verification: Fix relaxed canon for empty headers w/o
542 TF/02 Fix a couple more cases where we did not log the error message
543 when unlink() failed. See also change 4.74-TF/03.
545 TF/03 Make the exiwhat support code safe for signals. Previously Exim might
546 lock up or crash if it happened to be inside a call to libc when it
547 got a SIGUSR1 from exiwhat.
549 The SIGUSR1 handler appends the current process status to the process
550 log which is later printed by exiwhat. It used to use the general
551 purpose logging code to do this, but several functions it calls are
552 not safe for signals.
554 The new output code in the SIGUSR1 handler is specific to the process
555 log, and simple enough that it's easy to inspect for signal safety.
556 Removing some special cases also simplifies the general logging code.
557 Removing the spurious timestamps from the process log simplifies
560 TF/04 Improved ratelimit ACL condition.
562 The /noupdate option has been deprecated in favour of /readonly which
563 has clearer semantics. The /leaky, /strict, and /readonly update modes
564 are mutually exclusive. The update mode is no longer included in the
565 database key; it just determines when the database is updated. (This
566 means that when you upgrde Exim will forget old rate measurements.)
568 Exim now checks that the per_* options are used with an update mode that
569 makes sense for the current ACL. For example, when Exim is processing a
570 message (e.g. acl_smtp_rcpt or acl_smtp_data, etc.) you can specify
571 per_mail/leaky or per_mail/strict; otherwise (e.g. in acl_smtp_helo) you
572 must specify per_mail/readonly. If you omit the update mode it defaults to
573 /leaky where that makes sense (as before) or /readonly where required.
575 The /noupdate option is now undocumented but still supported for
576 backwards compatibility. It is equivalent to /readonly except that in
577 ACLs where /readonly is required you may specify /leaky/noupdate or
578 /strict/noupdate which are treated the same as /readonly.
580 A useful new feature is the /count= option. This is a generalization
581 of the per_byte option, so that you can measure the throughput of other
582 aggregate values. For example, the per_byte option is now equivalent
583 to per_mail/count=${if >{0}{$message_size} {0} {$message_size} }.
585 The per_rcpt option has been generalized using the /count= mechanism
586 (though it's more complicated than the per_byte equivalence). When it is
587 used in acl_smtp_rcpt, the per_rcpt option adds recipients to the
588 measured rate one at a time; if it is used later (e.g. in acl_smtp_data)
589 or in a non-SMTP ACL it adds all the recipients in one go. (The latter
590 /count=$recipients_count behaviour used to work only in non-SMTP ACLs.)
591 Note that using per_rcpt with a non-readonly update mode in more than
592 one ACL will cause the recipients to be double-counted. (The per_mail
593 and per_byte options don't have this problem.)
595 The handling of very low rates has changed slightly. If the computed rate
596 is less than the event's count (usually one) then this event is the first
597 after a long gap. In this case the rate is set to the same as this event's
598 count, so that the first message of a spam run is counted properly.
600 The major new feature is a mechanism for counting the rate of unique
601 events. The new per_addr option counts the number of different
602 recipients that someone has sent messages to in the last time period. It
603 behaves like per_rcpt if all the recipient addresses are different, but
604 duplicate recipient addresses do not increase the measured rate. Like
605 the /count= option this is a general mechanism, so the per_addr option
606 is equivalent to per_rcpt/unique=$local_part@$domain. You can, for
607 example, measure the rate that a client uses different sender addresses
608 with the options per_mail/unique=$sender_address. There are further
609 details in the main documentation.
611 TF/05 Removed obsolete $Cambridge$ CVS revision strings.
613 TF/06 Removed a few PCRE remnants.
615 TF/07 Automatically extract Exim's version number from tags in the git
616 repository when doing development or release builds.
618 PP/02 Raise smtp_cmd_buffer_size to 16kB.
619 Bugzilla 879. Patch from Paul Fisher.
621 PP/03 Implement SSL-on-connect outbound with protocol=smtps on smtp transport.
622 Heavily based on revision 40f9a89a from Simon Arlott's tree.
625 PP/04 Use .dylib instead of .so for dynamic library loading on MacOS.
627 PP/05 Variable $av_failed, true if the AV scanner deferred.
628 Bugzilla 1078. Patch from John Horne.
630 PP/06 Stop make process more reliably on build failure.
631 Bugzilla 1087. Patch from Heiko Schlittermann.
633 PP/07 Make maildir_use_size_file an _expandable_ boolean.
634 Bugzilla 1089. Patch from Heiko Schlittermann.
636 PP/08 Handle ${run} returning more data than OS pipe buffer size.
637 Bugzilla 1131. Patch from Holger Weiß.
639 PP/09 Handle IPv6 addresses with SPF.
640 Bugzilla 860. Patch from Wolfgang Breyha.
642 PP/10 GnuTLS: support TLS 1.2 & 1.1.
644 Use gnutls_certificate_verify_peers2() [patch from Andreas Metzler].
647 PP/11 match_* no longer expand right-hand-side by default.
648 New compile-time build option, EXPAND_LISTMATCH_RHS.
649 New expansion conditions, "inlist", "inlisti".
651 PP/12 fix uninitialised greeting string from PP/03 (smtps client support).
653 PP/13 shell and compiler warnings fixes for RC1-RC4 changes.
655 PP/14 fix log_write() format string regression from TF/03.
656 Bugzilla 1152. Patch from Dmitry Isaikin.
662 PP/01 The new ldap_require_cert option would segfault if used. Fixed.
664 PP/02 Harmonised TLS library version reporting; only show if debugging.
665 Layout now matches that introduced for other libraries in 4.74 PP/03.
667 PP/03 New openssl_options items: no_sslv2 no_sslv3 no_ticket no_tlsv1
669 PP/04 New "dns_use_edns0" global option.
671 PP/05 Don't segfault on misconfiguration of ref:name exim-user as uid.
674 PP/06 Extra paranoia around buffer usage at the STARTTLS transition.
675 nb: Exim is not vulnerable to http://www.kb.cert.org/vuls/id/555316
677 TK/01 Updated PolarSSL code to 0.14.2.
678 Bugzilla 1097. Patch from Andreas Metzler.
680 PP/07 Catch divide-by-zero in ${eval:...}.
683 PP/08 Condition negation of bool{}/bool_lax{} did not negate. Fixed.
686 TK/02 Bugzilla 1106: CVE-2011-1764 - DKIM log line was subject to a
687 format-string attack -- SECURITY: remote arbitrary code execution.
689 TK/03 SECURITY - DKIM signature header parsing was double-expanded, second
690 time unintentionally subject to list matching rules, letting the header
691 cause arbitrary Exim lookups (of items which can occur in lists, *not*
692 arbitrary string expansion). This allowed for information disclosure.
694 PP/09 Fix another SIGFPE (x86) in ${eval:...} expansion, this time related to
695 INT_MIN/-1 -- value coerced to INT_MAX.
701 NM/01 Workround for PCRE version dependency in version reporting
704 TF/01 Update valgrind.h and memcheck.h to copies from valgrind-3.6.0.
705 This fixes portability to compilers other than gcc, notably
706 Solaris CC and HP-UX CC. Fixes Bugzilla 1050.
708 TF/02 Bugzilla 139: Avoid using the += operator in the modular lookup
709 makefiles for portability to HP-UX and POSIX correctness.
711 PP/01 Permit LOOKUP_foo enabling on the make command-line.
712 Also via indented variable definition in the Makefile.
713 (Debugging by Oliver Heesakkers).
715 PP/02 Restore caching of spamd results with expanded spamd_address.
716 Patch from author of expandable spamd_address patch, Wolfgang Breyha.
718 PP/03 Build issue: lookups-Makefile now exports LC_ALL=C
719 Improves build reliability. Fix from: Frank Elsner
721 NM/02 Fix wide character breakage in the rfc2047 coding
722 Fixes bug 1064. Patch from Andrey N. Oktyabrski
724 NM/03 Allow underscore in dnslist lookups
725 Fixes bug 1026. Patch from Graeme Fowler
727 PP/04 Bugzilla 230: Support TLS-enabled LDAP (in addition to ldaps).
728 Code patches from Adam Ciarcinski of NetBSD.
730 NM/04 Fixed exiqgrep to cope with mailq missing size issue
733 PP/05 Bugzilla 1083: when lookup expansion defers, escape the output which
734 is logged, to avoid truncation. Patch from John Horne.
736 PP/06 Bugzilla 1042: implement freeze_signal on pipe transports.
737 Patch from Jakob Hirsch.
739 PP/07 Bugzilla 1061: restrict error messages sent over SMTP to not reveal
740 SQL string expansion failure details.
741 Patch from Andrey Oktyabrski.
743 PP/08 Bugzilla 486: implement %M datestamping in log filenames.
744 Patch from Simon Arlott.
746 PP/09 New lookups functionality failed to compile on old gcc which rejects
747 extern declarations in function scope.
748 Patch from Oliver Fleischmann
750 PP/10 Use sig_atomic_t for flags set from signal handlers.
751 Check getgroups() return and improve debugging.
752 Fixed developed for diagnosis in bug 927 (which turned out to be
755 PP/11 Bugzilla 1055: Update $message_linecount for maildir_tag.
756 Patch from Mark Zealey.
758 PP/12 Bugzilla 1056: Improved spamd server selection.
759 Patch from Mark Zealey.
761 PP/13 Bugzilla 1086: Deal with maildir quota file races.
762 Based on patch from Heiko Schlittermann.
764 PP/14 Bugzilla 1019: DKIM multiple signature generation fix.
765 Patch from Uwe Doering, sign-off by Michael Haardt.
767 NM/05 Fix to spam.c to accommodate older gcc versions which dislike
768 variable declaration deep within a block. Bug and patch from
771 PP/15 lookups-Makefile IRIX compatibilty coercion.
773 PP/16 Make DISABLE_DKIM build knob functional.
775 NM/06 Bugzilla 968: child_open_uid: restore default SIGPIPE handler
776 Patch by Simon Arlott
778 TF/03 Fix valgrind.h portability to C89 compilers that do not support
779 variable argument macros. Our copy now differs from upstream.
785 TF/01 Failure to get a lock on a hints database can have serious
786 consequences so log it to the panic log.
788 TF/02 Log LMTP confirmation messages in the same way as SMTP,
789 controlled using the smtp_confirmation log selector.
791 TF/03 Include the error message when we fail to unlink a spool file.
793 DW/01 Bugzilla 139: Support dynamically loaded lookups as modules.
794 With thanks to Steve Haslam, Johannes Berg & Serge Demonchaux
795 for maintaining out-of-tree patches for some time.
797 PP/01 Bugzilla 139: Documentation and portability issues.
798 Avoid GNU Makefile-isms, let Exim continue to build on BSD.
799 Handle per-OS dynamic-module compilation flags.
801 PP/02 Let /dev/null have normal permissions.
802 The 4.73 fixes were a little too stringent and complained about the
803 permissions on /dev/null. Exempt it from some checks.
804 Reported by Andreas M. Kirchwitz.
806 PP/03 Report version information for many libraries, including
807 Exim version information for dynamically loaded libraries. Created
808 version.h, now support a version extension string for distributors
809 who patch heavily. Dynamic module ABI change.
811 PP/04 CVE-2011-0017 - check return value of setuid/setgid. This is a
812 privilege escalation vulnerability whereby the Exim run-time user
813 can cause root to append content of the attacker's choosing to
816 PP/05 Bugzilla 1041: merged DCC maintainer's fixes for return code.
819 PP/06 Bugzilla 1071: fix delivery logging with untrusted macros.
820 If dropping privileges for untrusted macros, we disabled normal logging
821 on the basis that it would fail; for the Exim run-time user, this is not
822 the case, and it resulted in successful deliveries going unlogged.
823 Fixed. Reported by Andreas Metzler.
829 PP/01 Date: & Message-Id: revert to normally being appended to a message,
830 only prepend for the Resent-* case. Fixes regression introduced in
831 Exim 4.70 by NM/22 for Bugzilla 607.
833 PP/02 Include check_rfc2047_length in configure.default because we're seeing
834 increasing numbers of administrators be bitten by this.
836 JJ/01 Added DISABLE_DKIM and comment to src/EDITME
838 PP/03 Bugzilla 994: added openssl_options main configuration option.
840 PP/04 Bugzilla 995: provide better SSL diagnostics on failed reads.
842 PP/05 Bugzilla 834: provide a permit_coredump option for pipe transports.
844 PP/06 Adjust NTLM authentication to handle SASL Initial Response.
846 PP/07 If TLS negotiated an anonymous cipher, we could end up with SSL but
847 without a peer certificate, leading to a segfault because of an
848 assumption that peers always have certificates. Be a little more
849 paranoid. Problem reported by Martin Tscholak.
851 PP/08 Bugzilla 926: switch ClamAV to use the new zINSTREAM API for content
852 filtering; old API available if built with WITH_OLD_CLAMAV_STREAM=yes
853 NB: ClamAV planning to remove STREAM in "middle of 2010".
854 CL also introduces -bmalware, various -d+acl logging additions and
855 more caution in buffer sizes.
857 PP/09 Implemented reverse_ip expansion operator.
859 PP/10 Bugzilla 937: provide a "debug" ACL control.
861 PP/11 Bugzilla 922: Documentation dusting, patch provided by John Horne.
863 PP/12 Bugzilla 973: Implement --version.
865 PP/13 Bugzilla 752: Refuse to build/run if Exim user is root/0.
867 PP/14 Build without WITH_CONTENT_SCAN. Path from Andreas Metzler.
869 PP/15 Bugzilla 816: support multiple condition rules on Routers.
871 PP/16 Add bool_lax{} expansion operator and use that for combining multiple
872 condition rules, instead of bool{}. Make both bool{} and bool_lax{}
873 ignore trailing whitespace.
875 JJ/02 prevent non-panic DKIM error from being sent to paniclog
877 JJ/03 added tcp_wrappers_daemon_name to allow host entries other than
880 PP/17 Fix malware regression for cmdline scanner introduced in PP/08.
881 Notification from Dr Andrew Aitchison.
883 PP/18 Change ClamAV response parsing to be more robust and to handle ClamAV's
884 ExtendedDetectionInfo response format.
885 Notification from John Horne.
887 PP/19 OpenSSL 1.0.0a compatibility const-ness change, should be backwards
890 PP/20 Added a CONTRIBUTING file. Fixed the documentation build to use http:
891 XSL and documented dependency on system catalogs, with examples of how
894 DW/21 Added Valgrind hooks in store.c to help it capture out-of-bounds store
897 DW/22 Bugzilla 1044: CVE-2010-4345 - partial fix: restrict default behaviour
898 of CONFIGURE_OWNER and CONFIGURE_GROUP options to no longer allow a
899 configuration file which is writeable by the Exim user or group.
901 DW/23 Bugzilla 1044: CVE-2010-4345 - part two: extend checks for writeability
902 of configuration files to cover files specified with the -C option if
903 they are going to be used with root privileges, not just the default
906 DW/24 Bugzilla 1044: CVE-2010-4345 - part three: remove ALT_CONFIG_ROOT_ONLY
907 option (effectively making it always true).
909 DW/25 Add TRUSTED_CONFIG_PREFIX_FILE option to allow alternative configuration
910 files to be used while preserving root privileges.
912 DW/26 Set FD_CLOEXEC on SMTP sockets after forking in the daemon, to ensure
913 that rogue child processes cannot use them.
915 PP/27 Bugzilla 1047: change the default for system_filter_user to be the Exim
916 run-time user, instead of root.
918 PP/28 Add WHITELIST_D_MACROS option to let some macros be overridden by the
919 Exim run-time user without dropping privileges.
921 DW/29 Remove use of va_copy() which breaks pre-C99 systems. Duplicate the
922 result string, instead of calling string_vformat() twice with the same
925 DW/30 Allow TRUSTED_CONFIG_PREFIX_FILE only for Exim or CONFIGURE_OWNER, not
926 for other users. Others should always drop root privileges if they use
927 -C on the command line, even for a whitelisted configure file.
929 DW/31 Turn TRUSTED_CONFIG_PREFIX_FILE into TRUSTED_CONFIG_FILE. No prefixes.
931 NM/01 Fixed bug #1002 - Message loss when using multiple deliveries
937 JJ/01 installed exipick 20100104.1, adding $max_received_linelength,
938 $data_path, and $header_path variables; fixed documentation bugs and
941 JJ/02 installed exipick 20100222.0, added --input-dir and --finput to allow
942 exipick to access non-standard spools, including the "frozen" queue
945 NM/01 Bugzilla 965: Support mysql stored procedures.
946 Patch from Alain Williams
948 NM/02 Bugzilla 961: Spacing fix (syntax error) on Makefile directives for NetBSD
950 NM/03 Bugzilla 955: Documentation fix for max_rcpts.
951 Patch from Andreas Metzler
953 NM/04 Bugzilla 954: Fix for unknown responses from Dovecot authenticator.
954 Patch from Kirill Miazine
956 NM/05 Bugzilla 671: Added umask to procmail example.
958 JJ/03 installed exipick 20100323.0, fixing doc bug
960 NM/06 Bugzilla 988: CVE-2010-2023 - prevent hardlink attack on sticky mail
961 directory. Notification and patch from Dan Rosenberg.
963 TK/01 PDKIM: Upgrade PolarSSL files to upstream version 0.12.1.
965 TK/02 Improve log output when DKIM signing operation fails.
967 MH/01 Treat the transport option dkim_domain as a colon separated
968 list, not as a single string, and sign the message with each element,
969 omitting multiple occurences of the same signer.
971 NM/07 Null terminate DKIM strings, Null initialise DKIM variable
972 Bugzilla 985, 986. Patch by Simon Arlott
974 NM/08 Bugzilla 967. dnsdb DNS TXT record bug fix (DKIM-related)
975 Patch by Simon Arlott
977 PP/01 Bugzilla 989: CVE-2010-2024 - work round race condition on
978 MBX locking. Notification from Dan Rosenberg.
984 TK/01 Bugzilla 912: Fix DKIM segfault on empty headers/body.
986 NM/01 Bugzilla 913: Documentation fix for gnutls_* options.
988 NM/02 Bugzilla 722: Documentation for randint. Better randomness defaults.
990 NM/03 Bugzilla 847: Enable DNSDB lookup by default.
992 NM/04 Bugzilla 915: Flag broken perl installation during build.
998 TK/01 Added patch by Johannes Berg that expands the main option
999 "spamd_address" if it starts with a dollar sign.
1001 TK/02 Write list of recipients to X-Envelope-Sender header when building
1002 the mbox-format spool file for content scanning (suggested by Jakob
1005 TK/03 Added patch by Wolfgang Breyha that adds experimental DCC
1006 (http://www.dcc-servers.net/) support via dccifd. Activated by
1007 setting EXPERIMENTAL_DCC=yes in Local/Makefile.
1009 TK/04 Bugzilla 673: Add f-protd malware scanner support. Patch submitted
1010 by Mark Daniel Reidel <mr@df.eu>.
1012 NM/01 Bugzilla 657: Embedded PCRE removed from the exim source tree.
1013 When building exim an external PCRE library is now needed -
1014 PCRE is a system library on the majority of modern systems.
1015 See entry on PCRE_LIBS in EDITME file.
1017 NM/02 Bugzilla 646: Removed unwanted C/R in Dovecot authenticator
1018 conversation. Added nologin parameter to request.
1019 Patch contributed by Kirill Miazine.
1021 TF/01 Do not log submission mode rewrites if they do not change the address.
1023 TF/02 Bugzilla 662: Fix stack corruption before exec() in daemon.c.
1025 NM/03 Bugzilla 602: exicyclog now handles panic log, and creates empty
1026 log files in place. Contributed by Roberto Lima.
1028 NM/04 Bugzilla 667: Close socket used by dovecot authenticator.
1030 TF/03 Bugzilla 615: When checking the local_parts router precondition
1031 after a local_part_suffix or local_part_prefix option, Exim now
1032 does not use the address's named list lookup cache, since this
1033 contains cached lookups for the whole local part.
1035 NM/05 Bugzilla 521: Integrated SPF Best Guess support contributed by
1036 Robert Millan. Documentation is in experimental-spec.txt.
1038 TF/04 Bugzilla 668: Fix parallel build (make -j).
1040 NM/05.2 Bugzilla 437: Prevent Maildir aux files being created with mode 000.
1042 NM/05.3 Bugzilla 598: Improvement to Dovecot authenticator handling.
1043 Patch provided by Jan Srzednicki.
1045 TF/05 Leading white space used to be stripped from $spam_report which
1046 wrecked the formatting. Now it is preserved.
1048 TF/06 Save $spam_score, $spam_bar, and $spam_report in spool files, so
1049 that they are available at delivery time.
1051 TF/07 Fix the way ${extract is skipped in the untaken branch of a conditional.
1053 TF/08 TLS error reporting now respects the incoming_interface and
1054 incoming_port log selectors.
1056 TF/09 Produce a more useful error message if an SMTP transport's hosts
1057 setting expands to an empty string.
1059 NM/06 Bugzilla 744: EXPN did not work under TLS.
1060 Patch provided by Phil Pennock.
1062 NM/07 Bugzilla 769: Extraneous comma in usage fprintf
1063 Patch provided by Richard Godbee.
1065 NM/08 Fixed erroneous documentation references to smtp_notquit_acl to be
1066 acl_smtp_notquit, added index entry.
1068 NM/09 Bugzilla 787: Potential buffer overflow in string_format.
1069 Patch provided by Eugene Bujak.
1071 NM/10 Bugzilla 770: Problem on some platforms modifying the len parameter to
1072 accept(). Patch provided by Maxim Dounin.
1074 NM/11 Bugzilla 749: Preserve old behaviour of blanks comparing equal to zero.
1075 Patch provided by Phil Pennock.
1077 NM/12 Bugzilla 497: Correct behaviour of exiwhat when no config exists.
1079 NM/13 Bugzilla 590: Correct handling of Resent-Date headers.
1080 Patch provided by Brad "anomie" Jorsch.
1082 NM/14 Bugzilla 622: Added timeout setting to transport filter.
1083 Patch provided by Dean Brooks.
1085 TK/05 Add native DKIM support (does not depend on external libraries).
1087 NM/15 Bugzilla 854: Removed code that symlinks to pcre as its no longer useful.
1088 Patch provided by Graeme Fowler.
1090 NM/16 Bugzilla 851: Documentation example syntax fix.
1092 NM/17 Changed NOTICE file to remove references to embedded PCRE.
1094 NM/18 Bugzilla 894: Fix issue with very long lines including comments in
1097 NM/19 Bugzilla 745: TLS version reporting.
1098 Patch provided by Phil Pennock.
1100 NM/20 Bugzilla 167: bool: condition support.
1101 Patch provided by Phil Pennock.
1103 NM/21 Bugzilla 665: gnutls_compat_mode to allow compatibility with broken
1104 clients. Patch provided by Phil Pennock.
1106 NM/22 Bugzilla 607: prepend (not append) Resent-Message-ID and Resent-Date.
1107 Patch provided by Brad "anomie" Jorsch.
1109 NM/23 Bugzilla 687: Fix misparses in eximstats.
1110 Patch provided by Heiko Schlittermann.
1112 NM/24 Bugzilla 688: Fix exiwhat to handle log_selector = +pid.
1113 Patch provided by Heiko Schlittermann.
1115 NM/25 Bugzilla 727: Use transport mode as default mode for maildirsize file.
1116 plus update to original patch.
1118 NM/26 Bugzilla 799: Documentation correction for ratelimit.
1120 NM/27 Bugzilla 802: Improvements to local interface IP addr detection.
1121 Patch provided by David Brownlee.
1123 NM/28 Bugzilla 807: Improvements to LMTP delivery logging.
1125 NM/29 Bugzilla 862, 866, 875: Documentation bugfixes.
1127 NM/30 Bugzilla 888: TLS documentation bugfixes.
1129 NM/31 Bugzilla 896: Dovecot buffer overrun fix.
1131 NM/32 Bugzilla 889: Change all instances of "expr" in shell scripts to "expr --"
1132 Unlike the original bugzilla I have changed all shell scripts in src tree.
1134 NM/33 Bugzilla 898: Transport filter timeout fix.
1135 Patch by Todd Rinaldo.
1137 NM/34 Bugzilla 901: Fix sign/unsigned and UTF mismatches.
1138 Patch by Serge Demonchaux.
1140 NM/35 Bugzilla 39: Base64 decode bug fixes.
1141 Patch by Jakob Hirsch.
1143 NM/36 Bugzilla 909: Correct connect() call in dcc code.
1145 NM/37 Bugzilla 910: Correct issue with relaxed/simple handling.
1147 NM/38 Bugzilla 908: Removed NetBSD3 support as no longer needed.
1149 NM/39 Bugzilla 911: Fixed MakeLinks build script.
1155 TK/01 Add preliminary DKIM support. Currently requires a forked version of
1156 ALT-N's libdkim that I have put here:
1157 http://duncanthrax.net/exim-experimental/
1159 Note to Michael Haardt: I had to rename some vars in sieve.c. They
1160 were called 'true' and it seems that C99 defines that as a reserved
1161 keyword to be used with 'bool' variable types. That means you could
1162 not include C99-style headers which use bools without triggering
1163 build errors in sieve.c.
1165 NM/01 Bugzilla 592: --help option is handled incorrectly if exim is invoked
1166 as mailq or other aliases. Changed the --help handling significantly
1167 to do whats expected. exim_usage() emits usage/help information.
1169 SC/01 Added the -bylocaldomain option to eximstats.
1171 NM/02 Bugzilla 619: Defended against bad data coming back from gethostbyaddr.
1173 NM/03 Bugzilla 613: Documentation fix for acl_not_smtp.
1175 NM/04 Bugzilla 628: PCRE update to 7.4 (work done by John Hall).
1181 PH/01 Another patch from the Sieve maintainer.
1183 PH/02 When an IPv6 address is converted to a string for single-key lookup
1184 in an address list (e.g. for an item such as "net24-dbm;/net/works"),
1185 dots are used instead of colons so that keys in lsearch files need not
1186 contain colons. This was done some time before quoting was made available
1187 in lsearch files. However, iplsearch files do require colons in IPv6 keys
1188 (notated using the quote facility) so as to distinguish them from IPv4
1189 keys. This meant that lookups for IP addresses in host lists did not work
1190 for iplsearch lookups.
1192 This has been fixed by arranging for IPv6 addresses to be expressed with
1193 colons if the lookup type is iplsearch. This is not incompatible, because
1194 previously such lookups could never work.
1196 The situation is now rather anomolous, since one *can* have colons in
1197 ordinary lsearch keys. However, making the change in all cases is
1198 incompatible and would probably break a number of configurations.
1200 TK/01 Change PRVS address formatting scheme to reflect latests BATV draft
1203 MH/01 The "spam" ACL condition code contained a sscanf() call with a %s
1204 conversion specification without a maximum field width, thereby enabling
1205 a rogue spamd server to cause a buffer overflow. While nobody in their
1206 right mind would setup Exim to query an untrusted spamd server, an
1207 attacker that gains access to a server running spamd could potentially
1208 exploit this vulnerability to run arbitrary code as the Exim user.
1210 TK/02 Bugzilla 502: Apply patch to make the SPF-Received: header use
1211 $primary_hostname instead of what libspf2 thinks the hosts name is.
1213 MH/02 The dsearch lookup now uses lstat(2) instead of stat(2) to look for
1214 a directory entry by the name of the lookup key. Previously, if a
1215 symlink pointed to a non-existing file or a file in a directory that
1216 Exim lacked permissions to read, a lookup for a key matching that
1217 symlink would fail. Now it is enough that a matching directory entry
1218 exists, symlink or not. (Bugzilla 503.)
1220 PH/03 The body_linecount and body_zerocount variables are now exported in the
1223 PH/04 Added the $dnslist_matched variable.
1225 PH/05 Unset $tls_cipher and $tls_peerdn before making a connection as a client.
1226 This means they are set thereafter only if the connection becomes
1229 PH/06 Added the client_condition to authenticators so that some can be skipped
1230 by clients under certain conditions.
1232 PH/07 The error message for a badly-placed control=no_multiline_responses left
1233 "_responses" off the end of the name.
1235 PH/08 Added -Mvc to output a copy of a message in RFC 2822 format.
1237 PH/09 Tidied the code for creating ratelimiting keys, creating them explicitly
1238 (without spaces) instead of just copying the configuration text.
1240 PH/10 Added the /noupdate option to the ratelimit ACL condition.
1242 PH/11 Added $max_received_linelength.
1244 PH/12 Added +ignore_defer and +include_defer to host lists.
1246 PH/13 Installed PCRE version 7.2. This needed some changes because of the new
1247 way in which PCRE > 7.0 is built.
1249 PH/14 Implemented queue_only_load_latch.
1251 PH/15 Removed an incorrect (int) cast when reading the value of SIZE in a
1252 MAIL command. The effect was to mangle the value on 64-bit systems.
1254 PH/16 Another patch from the Sieve maintainer.
1256 PH/17 Added the NOTQUIT ACL, based on a patch from Ted Cooper.
1258 PH/18 If a system quota error occurred while trying to create the file for
1259 a maildir delivery, the message "Mailbox is full" was not appended to the
1260 bounce if the delivery eventually timed out. Change 4.67/27 below applied
1261 only to a quota excession during the actual writing of the file.
1263 PH/19 It seems that peer DN values may contain newlines (and other non-printing
1264 characters?) which causes problems in log lines. The DN values are now
1265 passed through string_printing() before being added to log lines.
1267 PH/20 Added the "servers=" facility to MySQL and PostgreSQL lookups. (Oracle
1268 and InterBase are left for another time.)
1270 PH/21 Added message_body_newlines option.
1272 PH/22 Guard against possible overflow in moan_check_errorcopy().
1274 PH/23 POSIX allows open() to be a macro; guard against that.
1276 PH/24 If the recipient of an error message contained an @ in the local part
1277 (suitably quoted, of course), incorrect values were put in $domain and
1278 $local_part during the evaluation of errors_copy.
1284 MH/01 Fix for bug #448, segfault in Dovecot authenticator when interface_address
1285 is unset (happens when testing with -bh and -oMi isn't used). Thanks to
1288 PH/01 Added a new log selector smtp_no_mail, to log SMTP sessions that do not
1289 issue a MAIL command.
1291 PH/02 In an ACL statement such as
1293 deny dnslists = X!=127.0.0.2 : X=127.0.0.2
1295 if a client was not listed at all, or was listed with a value other than
1296 127.0.0.2, in the X list, but was listed with 127.0.0.2 in the Y list,
1297 the condition was not true (as it should be), so access was not denied.
1298 The bug was that the ! inversion was incorrectly passed on to the second
1299 item. This has been fixed.
1301 PH/03 Added additional dnslists conditions == and =& which are different from
1302 = and & when the dns lookup returns more than one IP address.
1304 PH/04 Added gnutls_require_{kx,mac,protocols} to give more control over the
1305 cipher suites used by GnuTLS. These options are ignored by OpenSSL.
1307 PH/05 After discussion on the list, added a compile time option ENABLE_DISABLE_
1308 FSYNC, which compiles an option called disable_fsync that allows for
1309 bypassing fsync(). The documentation is heavily laced with warnings.
1311 SC/01 Updated eximstats to collate all SpamAssassin rejects into one bucket.
1313 PH/06 Some tidies to the infrastructure of the Test Suite that is concerned
1314 with the auxiliary C programs that it uses: (1) Arrange for BIND_8_COMPAT
1315 to be defined when compiling on OSX (Darwin); (2) Tidies to the Makefile,
1316 including adding "make clean"; (3) Added -fPIC when compiling the test
1317 dynamically loaded module, to get rid of a warning.
1319 MH/02 Fix for bug #451, causing paniclog entries to be written if a bounce
1320 message fails, move_frozen_messages = true and ignore_bounce_errors_after
1321 = 0s. The bug is otherwise harmless.
1323 PH/07 There was a bug in the dovecot authenticator such that the value of
1324 $auth1 could be overwritten, and so not correctly preserved, after a
1325 successful authentication. This usually meant that the value preserved by
1326 the server_setid option was incorrect.
1328 PH/08 Added $smtp_count_at_connection_start, deliberately with a long name.
1330 PH/09 Installed PCRE release 7.0.
1332 PH/10 The acl_not_smtp_start ACL was, contrary to the documentation, not being
1333 run for batched SMTP input. It is now run at the start of every message
1334 in the batch. While fixing this I discovered that the process information
1335 (output by running exiwhat) was not always getting set for -bs and -bS
1336 input. This is fixed, and it now also says "batched" for BSMTP.
1338 PH/11 Added control=no_pipelining.
1340 PH/12 Added $sending_ip_address and $sending_port (mostly Magnus Holmgren's
1341 patch, slightly modified), and move the expansion of helo_data till after
1342 the connection is made in the smtp transport (so it can use these
1345 PH/13 Added ${rfc2047d: to decoded RFC 2047 strings.
1347 PH/14 Added log_selector = +pid.
1349 PH/15 Flush SMTP output before delaying, unless control=no_delay_flush is set.
1351 PH/16 Add ${if forany and ${if forall.
1353 PH/17 Added dsn_from option to vary the From: line in DSNs.
1355 PH/18 Flush SMTP output before performing a callout, unless control =
1356 no_callout_flush is set.
1358 PH/19 Change 4.64/PH/36 introduced a bug: when address_retry_include_sender
1359 was true (the default) a successful delivery failed to delete the retry
1360 item, thus causing premature timeout of the address. The bug is now
1363 PH/20 Added hosts_avoid_pipelining to the smtp transport.
1365 PH/21 Long custom messages for fakedefer and fakereject are now split up
1366 into multiline reponses in the same way that messages for "deny" and
1367 other ACL rejections are.
1369 PH/22 Applied Jori Hamalainen's speed-up changes and typo fixes to exigrep,
1370 with slight modification.
1372 PH/23 Applied sieve patches from the maintainer "tracking the latest notify
1373 draft, changing the syntax and factoring some duplicate code".
1375 PH/24 When the log selector "outgoing_port" was set, the port was shown as -1
1376 for deliveries of the second and subsequent messages over the same SMTP
1379 PH/25 Applied Magnus Holmgren's patch for ${addresses, ${map, ${filter, and
1380 ${reduce, with only minor "tidies".
1382 SC/02 Applied Daniel Tiefnig's patch to improve the '($parent) =' pattern match.
1384 PH/26 Added a "continue" ACL modifier that does nothing, for the benefit of its
1385 expansion side effects.
1387 PH/27 When a message times out after an over-quota error from an Exim-imposed
1388 quota, the bounce message says "mailbox is full". This message was not
1389 being given when it was a system quota that was exceeded. It now should
1392 MH/03 Made $recipients available in local_scan(). local_scan() already has
1393 better access to the recipient list through recipients_list[], but
1394 $recipients can be useful in postmaster-provided expansion strings.
1396 PH/28 The $smtp_command and $smtp_command_argument variables were not correct
1397 in the case of a MAIL command with additional options following the
1398 address, for example: MAIL FROM:<foo@bar> SIZE=1234. The option settings
1399 were accidentally chopped off.
1401 PH/29 SMTP synchronization checks are implemented when a command is read -
1402 there is a check that no more input is waiting when there shouldn't be
1403 any. However, for some commands, a delay in an ACL can mean that it is
1404 some time before the response is written. In this time, more input might
1405 arrive, invalidly. So now there are extra checks after an ACL has run for
1406 HELO/EHLO and after the predata ACL, and likewise for MAIL and RCPT when
1407 pipelining has not been advertised.
1409 PH/30 MH's patch to allow iscntrl() characters to be list separators.
1411 PH/31 Unlike :fail:, a custom message specified with :defer: was not being
1412 returned in the SMTP response when smtp_return_error_details was false.
1413 This has been fixed.
1415 PH/32 Change the Dovecot authenticator to use read() and write() on the socket
1416 instead of the C I/O that was originally supplied, because problems were
1417 reported on Solaris.
1419 PH/33 Compile failed with OpenSSL 0.9.8e. This was due to a coding error in
1420 Exim which did not show up earlier: it was assuming that a call to
1421 SSL_CTX_set_info_callback() might give an error value. In fact, there is
1422 no error. In previous releases of OpenSSL, SSL_CTX_set_info_callback()
1423 was a macro that became an assignment, so it seemed to work. This has
1424 changed to a proper function call with a void return, hence the compile
1425 error. Exim's code has been fixed.
1427 PH/34 Change HDA_SIZE in oracle.c from 256 to 512. This is needed for 64-bit
1430 PH/35 Applied a patch from the Sieve maintainer which fixes a bug in "notify".
1432 PH/36 Applied John Jetmore's patch to add -v functionality to exigrep.
1434 PH/37 If a message is not accepted after it has had an id assigned (e.g.
1435 because it turns out to be too big or there is a timeout) there is no
1436 "Completed" line in the log. When some messages of this type were
1437 selected by exigrep, they were listed as "not completed". Others were
1438 picked up by some special patterns. I have improved the selection
1439 criteria to be more general.
1441 PH/38 The host_find_failed option in the manualroute router can now be set
1442 to "ignore", to completely ignore a host whose IP address cannot be
1443 found. If all hosts are ignored, the behaviour is controlled by the new
1444 host_all_ignored option.
1446 PH/39 In a list of hosts for manualroute, if one item (either because of multi-
1447 homing or because of multiple MX records with /mx) generated more than
1448 one IP address, and the following item turned out to be the local host,
1449 all the secondary addresses of the first item were incorrectly removed
1450 from the list, along with the local host and any following hosts (which
1451 is what is supposed to happen).
1453 PH/40 When Exim receives a message, it writes the login name, uid, and gid of
1454 whoever called Exim into the -H file. In the case of the daemon it was
1455 behaving confusingly. When first started, it used values for whoever
1456 started the daemon, but after a SIGHUP it used the Exim user (because it
1457 calls itself on a restart). I have changed the code so that it now always
1460 PH/41 (Following a suggestion from Tony Finch) If all the RCPT commands in a
1461 message are rejected with the same error (e.g. no authentication or bad
1462 sender address), and a DATA command is nevertheless sent (as can happen
1463 with PIPELINING or a stupid MUA), the error message that was given to the
1464 RCPT commands is included in the rejection of the DATA command. This is
1465 intended to be helpful for MUAs that show only the final error to their
1468 PH/42 Another patch from the Sieve maintainer.
1470 SC/02 Eximstats - Differentiate between permanent and temporary rejects.
1471 Eximstats - Fixed some broken HTML links and added missing column headers
1473 Eximstats - Fixed Grand Total Summary Domains, Edomains, and Email
1474 columns for Rejects, Temp Rejects, Ham, and Spam rows.
1476 SC/03 Eximstats - V1.58 Fix to get <> and blackhole to show in edomain tables.
1478 PH/43 Yet another patch from the Sieve maintainer.
1480 PH/44 I found a way to check for a TCP/IP connection going away before sending
1481 the response to the final '.' that terminates a message, but only in the
1482 case where the client has not sent further data following the '.'
1483 (unfortunately, this is allowed). However, in many cases there won't be
1484 any further data because there won't be any more messages to send. A call
1485 to select() can be used: if it shows that the input is "ready", there is
1486 either input waiting, or the socket has been closed. An attempt to read
1487 the next input character can distinguish the two cases. Previously, Exim
1488 would have sent an OK response which the client would never have see.
1489 This could lead to message repetition. This fix should cure that, at
1490 least in a lot of common cases.
1492 PH/45 Do not advertise STARTTLS in response to HELP unless it would be
1493 advertised in response to EHLO.
1499 PH/01 Two more bugs that were introduced by 4.64/PH/07, in addition to the one
1500 fixed by 4.65/MH/01 (is this a record?) are fixed:
1502 (i) An empty string was always treated as zero by the numeric comparison
1503 operators. This behaviour has been restored.
1505 (ii) It is documented that the numeric comparison operators always treat
1506 their arguments as decimal numbers. This was broken in that numbers
1507 starting with 0 were being interpreted as octal.
1509 While fixing these problems I realized that there was another issue that
1510 hadn't been noticed. Values of message_size_limit (both the global option
1511 and the transport option) were treated as octal if they started with 0.
1512 The documentation was vague. These values are now always treated as
1513 decimal, and I will make that clear in the documentation.
1519 TK/01 Disable default definition of HAVE_LINUX_SENDFILE. Clashes with
1520 Linux large file support (_FILE_OFFSET_BITS=64) on older glibc
1523 MH/01 Don't check that the operands of numeric comparison operators are
1524 integers when their expansion is in "skipping" mode (fixes bug
1525 introduced by 4.64-PH/07).
1527 PH/01 If a system filter or a router generates more than SHRT_MAX (32767)
1528 child addresses, Exim now panics and dies. Previously, because the count
1529 is held in a short int, deliveries were likely to be lost. As such a
1530 large number of recipients for a single message is ridiculous
1531 (performance will be very, very poor), I have chosen to impose a limit
1532 rather than extend the field.
1538 TK/01 Bugzilla #401. Fix DK spooling code so that it can overwrite a
1539 leftover -K file (the existence of which was triggered by #402).
1540 While we were at it, introduced process PID as part of the -K
1541 filename. This should rule out race conditions when creating
1544 TK/02 Bugzilla #402. Apply patch from Simon Arlott, speeding up DK signing
1545 processing considerably. Previous code took too long for large mails,
1546 triggering a timeout which in turn triggers #401.
1548 TK/03 Introduced HAVE_LINUX_SENDFILE to os.h-Linux. Currently only used
1549 in the DK code in transports.c. sendfile() is not really portable,
1550 hence the _LINUX specificness.
1552 TF/01 In the add_headers option to the mail command in an Exim filter,
1553 there was a bug that Exim would claim a syntax error in any
1554 header after the first one which had an odd number of characters
1557 PH/01 If a server that rejects MAIL FROM:<> was the target of a sender
1558 callout verification, Exim cached a "reject" for the entire domain. This
1559 is correct for most verifications, but it is not correct for a recipient
1560 verification with use_sender or use_postmaster set, because in that case
1561 the callout does not use MAIL FROM:<>. Exim now distinguishes the special
1562 case of MAIL FROM:<> rejection from other early rejections (e.g.
1563 rejection of HELO). When verifying a recipient using a non-null MAIL
1564 address, the cache is ignored if it shows MAIL FROM:<> rejection.
1565 Whatever the result of the callout, the value of the domain cache is
1566 left unchanged (for any other kind of callout, getting as far as trying
1567 RCPT means that the domain itself is ok).
1569 PH/02 Tidied a number of unused variable and signed/unsigned warnings that
1572 PH/03 On Solaris, an unexpectedly close socket (dropped connection) can
1573 manifest itself as EPIPE rather than ECONNECT. When tidying away a
1574 session, the daemon ignores ECONNECT errors and logs others; it now
1575 ignores EPIPE as well.
1577 PH/04 Applied Nico Erfurth's refactoring patch to tidy up mime.c
1578 (quoted-printable decoding).
1580 PH/05 Applied Nico Erfurth's refactoring patch to tidy up spool_mbox.c, and
1581 later the small subsequent patch to fix an introduced bug.
1583 PH/06 Installed the latest Cygwin Makefile from the Cygwin maintainer.
1585 PH/07 There was no check for overflow in expansions such as ${if >{1}{4096M}}.
1587 PH/08 An error is now given if message_size_limit is specified negative.
1589 PH/09 Applied and tidied up Jakob Hirsch's patch for allowing ACL variables
1590 to be given (somewhat) arbitrary names.
1592 JJ/01 exipick 20060919.0, allow for arbitrary acl_ variables introduced
1595 JJ/02 exipick 20060919.0, --show-vars args can now be regular expressions,
1596 miscellaneous code fixes
1598 PH/10 Added the log_reject_target ACL modifier to specify where to log
1601 PH/11 Callouts were setting the name used for EHLO/HELO from $smtp_active_
1602 hostname. This is wrong, because it relates to the incoming message (and
1603 probably the interface on which it is arriving) and not to the outgoing
1604 callout (which could be using a different interface). This has been
1605 changed to use the value of the helo_data option from the smtp transport
1606 instead - this is what is used when a message is actually being sent. If
1607 there is no remote transport (possible with a router that sets up host
1608 addresses), $smtp_active_hostname is used.
1610 PH/12 Installed Andrey Panin's patch to add a dovecot authenticator. Various
1611 tweaks were necessary in order to get it to work (see also 21 below):
1612 (a) The code assumed that strncpy() returns a negative number on buffer
1613 overflow, which isn't the case. Replaced with Exim's string_format()
1615 (b) There were several signed/unsigned issues. I just did the minimum
1616 hacking in of casts. There is scope for a larger refactoring.
1617 (c) The code used strcasecmp() which is not a standard C function.
1618 Replaced with Exim's strcmpic() function.
1619 (d) The code set only $1; it now sets $auth1 as well.
1620 (e) A simple test gave the error "authentication client didn't specify
1621 service in request". It would seem that Dovecot has changed its
1622 interface. Fortunately there's a specification; I followed it and
1623 changed what the client sends and it appears to be working now.
1625 PH/13 Added $message_headers_raw to provide the headers without RFC 2047
1628 PH/14 Corrected misleading output from -bv when -v was also used. Suppose the
1629 address A is aliased to B and C, where B exists and C does not. Without
1630 -v the output is "A verified" because verification stops after a
1631 successful redirection if more than one address is generated. However,
1632 with -v the child addresses are also verified. Exim was outputting "A
1633 failed to verify" and then showing the successful verification for C,
1634 with its parentage. It now outputs "B failed to verify", showing B's
1635 parentage before showing the successful verification of C.
1637 PH/15 Applied Michael Deutschmann's patch to allow DNS black list processing to
1638 look up a TXT record in a specific list after matching in a combined
1641 PH/16 It seems that the options setting for the resolver (RES_DEFNAMES and
1642 RES_DNSRCH) can affect the behaviour of gethostbyname() and friends when
1643 they consult the DNS. I had assumed they would set it the way they
1644 wanted; and indeed my experiments on Linux seem to show that in some
1645 cases they do (I could influence IPv6 lookups but not IPv4 lookups).
1646 To be on the safe side, however, I have now made the interface to
1647 host_find_byname() similar to host_find_bydns(), with an argument
1648 containing the DNS resolver options. The host_find_byname() function now
1649 sets these options at its start, just as host_find_bydns() does. The smtp
1650 transport options dns_qualify_single and dns_search_parents are passed to
1651 host_find_byname() when gethostbyname=TRUE in this transport. Other uses
1652 of host_find_byname() use the default settings of RES_DEFNAMES
1653 (qualify_single) but not RES_DNSRCH (search_parents).
1655 PH/17 Applied (a modified version of) Nico Erfurth's patch to make
1656 spool_read_header() do less string testing, by means of a preliminary
1657 switch on the second character of optional "-foo" lines. (This is
1658 overdue, caused by the large number of possibilities that now exist.
1659 Originally there were few.) While I was there, I also converted the
1660 str(n)cmp tests so they don't re-test the leading "-" and the first
1661 character, in the hope this might squeeze out yet more improvement.
1663 PH/18 Two problems with "group" syntax in header lines when verifying: (1) The
1664 flag allowing group syntax was set by the header_syntax check but not
1665 turned off, possible causing trouble later; (2) The flag was not being
1666 set at all for the header_verify test, causing "group"-style headers to
1667 be rejected. I have now set it in this case, and also caused header_
1668 verify to ignore an empty address taken from a group. While doing this, I
1669 came across some other cases where the code for allowing group syntax
1670 while scanning a header line wasn't quite right (mostly, not resetting
1671 the flag correctly in the right place). These bugs could have caused
1672 trouble for malformed header lines. I hope it is now all correct.
1674 PH/19 The functions {pwcheck,saslauthd}_verify_password() are always called
1675 with the "reply" argument non-NULL. The code, however (which originally
1676 came from elsewhere) had *some* tests for NULL when it wrote to *reply,
1677 but it didn't always do it. This confused somebody who was copying the
1678 code for some other use. I have removed all the tests.
1680 PH/20 It was discovered that the GnuTLS code had support for RSA_EXPORT, a
1681 feature that was used to support insecure browsers during the U.S. crypto
1682 embargo. It requires special client support, and Exim is probably the
1683 only MTA that supported it -- and would never use it because real RSA is
1684 always available. This code has been removed, because it had the bad
1685 effect of slowing Exim down by computing (never used) parameters for the
1686 RSA_EXPORT functionality.
1688 PH/21 On the advice of Timo Sirainen, added a check to the dovecot
1689 authenticator to fail if there's a tab character in the incoming data
1690 (there should never be unless someone is messing about, as it's supposed
1691 to be base64-encoded). Also added, on Timo's advice, the "secured" option
1692 if the connection is using TLS or if the remote IP is the same as the
1693 local IP, and the "valid-client-cert option" if a client certificate has
1696 PH/22 As suggested by Dennis Davis, added a server_condition option to *all*
1697 authenticators. This can be used for authorization after authentication
1698 succeeds. (In the case of plaintext, it servers for both authentication
1701 PH/23 Testing for tls_required and lost_connection in a retry rule didn't work
1702 if any retry times were supplied.
1704 PH/24 Exim crashed if verify=helo was activated during an incoming -bs
1705 connection, where there is no client IP address to check. In this
1706 situation, the verify now always succeeds.
1708 PH/25 Applied John Jetmore's -Mset patch.
1710 PH/26 Added -bem to be like -Mset, but loading a message from a file.
1712 PH/27 In a string expansion for a processed (not raw) header when multiple
1713 headers of the same name were present, leading whitespace was being
1714 removed from all of them, but trailing whitespace was being removed only
1715 from the last one. Now trailing whitespace is removed from each header
1716 before concatenation. Completely empty headers in a concatenation (as
1717 before) are ignored.
1719 PH/28 Fixed bug in backwards-compatibility feature of PH/09 (thanks to John
1720 Jetmore). It would have mis-read ACL variables from pre-4.61 spool files.
1722 PH/29 [Removed. This was a change that I later backed out, and forgot to
1723 correct the ChangeLog entry (that I had efficiently created) before
1724 committing the later change.]
1726 PH/30 Exim was sometimes attempting to deliver messages that had suffered
1727 address errors (4xx response to RCPT) over the same connection as other
1728 messages routed to the same hosts. Such deliveries are always "forced",
1729 so retry times are not inspected. This resulted in far too many retries
1730 for the affected addresses. The effect occurred only when there were more
1731 hosts than the hosts_max_try setting in the smtp transport when it had
1732 the 4xx errors. Those hosts that it had tried were not added to the list
1733 of hosts for which the message was waiting, so if all were tried, there
1734 was no problem. Two fixes have been applied:
1736 (i) If there are any address or message errors in an SMTP delivery, none
1737 of the hosts (tried or untried) are now added to the list of hosts
1738 for which the message is waiting, so the message should not be a
1739 candidate for sending over the same connection that was used for a
1740 successful delivery of some other message. This seems entirely
1741 reasonable: after all the message is NOT "waiting for some host".
1742 This is so "obvious" that I'm not sure why it wasn't done
1743 previously. Hope I haven't missed anything, but it can't do any
1744 harm, as the worst effect is to miss an optimization.
1746 (ii) If, despite (i), such a delivery is accidentally attempted, the
1747 routing retry time is respected, so at least it doesn't keep
1748 hammering the server.
1750 PH/31 Installed Andrew Findlay's patch to close the writing end of the socket
1751 in ${readsocket because some servers need this prod.
1753 PH/32 Added some extra debug output when updating a wait-xxx database.
1755 PH/33 The hint "could be header name not terminated by colon", which has been
1756 given for certain expansion errors for a long time, was not being given
1757 for the ${if def:h_colon_omitted{... case.
1759 PH/34 The spec says: "With one important exception, whenever a domain list is
1760 being scanned, $domain contains the subject domain." There was at least
1761 one case where this was not true.
1763 PH/35 The error "getsockname() failed: connection reset by peer" was being
1764 written to the panic log as well as the main log, but it isn't really
1765 panic-worthy as it just means the connection died rather early on. I have
1766 removed the panic log writing for the ECONNRESET error when getsockname()
1769 PH/36 After a 4xx response to a RCPT error, that address was delayed (in queue
1770 runs only) independently of the message's sender address. This meant
1771 that, if the 4xx error was in fact related to the sender, a different
1772 message to the same recipient with a different sender could confuse
1773 things. In particualar, this can happen when sending to a greylisting
1774 server, but other circumstances could also provoke similar problems.
1775 I have changed the default so that the retry time for these errors is now
1776 based a combination of the sender and recipient addresses. This change
1777 can be overridden by setting address_retry_include_sender=false in the
1780 PH/37 For LMTP over TCP/IP (the smtp transport), error responses from the
1781 remote server are returned as part of bounce messages. This was not
1782 happening for LMTP over a pipe (the lmtp transport), but now it is the
1783 same for both kinds of LMTP.
1785 PH/38 Despite being documented as not happening, Exim was rewriting addresses
1786 in header lines that were in fact CNAMEs. This is no longer the case.
1788 PH/39 If -R or -S was given with -q<time>, the effect of -R or -S was ignored,
1789 and queue runs started by the daemon processed all messages. This has
1790 been fixed so that -R and -S can now usefully be given with -q<time>.
1792 PH/40 Import PCRE release 6.7 (fixes some bugs).
1794 PH/41 Add bitwise logical operations to eval (courtesy Brad Jorsch).
1796 PH/42 Give an error if -q is specified more than once.
1798 PH/43 Renamed the variables $interface_address and $interface_port as
1799 $received_ip_address and $received_port, to make it clear that these
1800 values apply to message reception, and not to the outgoing interface when
1801 a message is delivered. (The old names remain recognized, of course.)
1803 PH/44 There was no timeout on the connect() call when using a Unix domain
1804 socket in the ${readsocket expansion. There now is.
1806 PH/45 Applied a modified version of Brad Jorsch's patch to allow "message" to
1807 be meaningful with "accept".
1809 SC/01 Eximstats V1.43
1810 Bug fix for V1.42 with -h0 specified. Spotted by Chris Lear.
1812 SC/02 Eximstats V1.44
1813 Use a glob alias rather than an array ref in the generated
1814 parser. This improves both readability and performance.
1816 SC/03 Eximstats V1.45 (Marco Gaiarin / Steve Campbell)
1817 Collect SpamAssassin and rejection statistics.
1818 Don't display local sender or destination tables unless
1819 there is data to show.
1820 Added average volumes into the top table text output.
1822 SC/04 Eximstats V1.46
1823 Collect data on the number of addresses (recipients)
1824 as well as the number of messages.
1826 SC/05 Eximstats V1.47
1827 Added 'Message too big' to the list of mail rejection
1828 reasons (thanks to Marco Gaiarin).
1830 SC/06 Eximstats V1.48
1831 Mainlog lines which have GMT offsets and are too short to
1832 have a flag are now skipped.
1834 SC/07 Eximstats V1.49 (Alain Williams)
1835 Added the -emptyok flag.
1837 SC/08 Eximstats V1.50
1838 Fixes for obtaining the IP address from reject messages.
1840 JJ/03 exipick.20061117.2, made header handling as similar to exim as possible
1841 (added [br]h_ prefixes, implemented RFC2047 decoding. Fixed
1842 whitesspace changes from 4.64-PH/27
1844 JJ/04 exipick.20061117.2, fixed format and added $message_headers_raw to
1847 JJ/05 exipick.20061117.2, bug fixes (error out sooner when invalid criteria
1848 are found, allow negative numbers in numeric criteria)
1850 JJ/06 exipick.20061117.2, added new $message_body_missing variable
1852 JJ/07 exipick.20061117.2, added $received_ip_address and $received_port
1853 to match changes made in 4.64-PH/43
1855 PH/46 Applied Jori Hamalainen's patch to add features to exiqsumm.
1857 PH/47 Put in an explicit test for a DNS lookup of an address record where the
1858 "domain" is actually an IP address, and force a failure. This locks out
1859 those revolvers/nameservers that support "A-for-A" lookups, in
1860 contravention of the specifications.
1862 PH/48 When a host name was looked up from an IP address, and the subsequent
1863 forward lookup of the name timed out, the host name was left in
1864 $sender_host_name, contrary to the specification.
1866 PH/49 Although default lookup types such as lsearch* or cdb*@ have always been
1867 restricted to single-key lookups, Exim was not diagnosing an error if
1868 * or *@ was used with a query-style lookup.
1870 PH/50 Increased the value of DH_BITS in tls-gnu.c from 768 to 1024.
1872 MH/01 local_scan ABI version incremented to 1.1. It should have been updated
1873 long ago, but noone interested enough thought of it. Let's just say that
1874 the "1.1" means that there are some new functions that weren't there at
1875 some point in the past.
1877 PH/51 Error processing for expansion failure of helo_data from an smtp
1878 transport during callout processing was broken.
1880 PH/52 Applied John Jetmore's patch to allow tls-on-connect and STARTTLS to be
1881 tested/used via the -bh/-bhc/-bs options.
1883 PH/53 Added missing "#include <time.h>" to pcre/pcretest.c (this was a PCRE
1884 bug, fixed in subsequent PCRE releases).
1886 PH/54 Applied Robert Bannocks' patch to avoid a problem with references that
1887 arises when using the Solaris LDAP libraries (but not with OpenLDAP).
1889 PH/55 Check for a ridiculously long file name in exim_dbmbuild.
1895 SC/01 Use a glob alias rather than an array ref in eximstats generated
1896 parser. This improves both readability and performance.
1898 SC/02 Collect SpamAssassin and rejection statistics in eximstats.
1899 Don't display local sender or destination tables in eximstats unless
1900 there is data to show.
1901 Added average volumes into the eximstats top table text output.
1903 SC/03 Collect data on the number of addresses (recipients) as well
1904 as the number of messages in eximstats.
1906 TF/01 Correct an error in the documentation for the redirect router. Exim
1907 does (usually) call initgroups() when daemonizing.
1909 TF/02 Call initgroups() when dropping privilege in exim.c, so that Exim runs
1910 with consistent privilege compared to when running as a daemon.
1912 TF/03 Note in the spec that $authenticated_id is not set for local
1913 submissions from trusted users.
1915 TF/04 The ratelimit per_rcpt option now works correctly in acl_not_smtp.
1916 Thanks to Dean Brooks <dean@iglou.com> for the patch.
1918 TF/05 Make it easier to get SMTP authentication and TLS/SSL support working
1919 by adding some example configuration directives to the default
1920 configuration file. A little bit of work is required to uncomment the
1921 directives and define how usernames and passwords are checked, but
1922 there is now a framework to start from.
1924 PH/01 Added #define LDAP_DEPRECATED 1 to ldap.c because some of the "old"
1925 functions that Exim currently uses aren't defined in ldap.h for OpenLDAP
1926 without this. I don't know how relevant this is to other LDAP libraries.
1928 PH/02 Add the verb name to the "unknown ACL verb" error.
1930 PH/03 Magnus Holmgren's patch for filter_prepend_home.
1932 PH/03 Fixed Bugzilla #101: macro definition between ACLs doesn't work.
1934 PH/04 Applied Magnus Holmgren's patch to fix Bugzilla #98: transport's home
1935 directory not expanded when it should be if an expanded home directory
1936 was set for the address (which is overridden by the transport).
1938 PH/05 Applied Alex Kiernan's patch to fix Bugzilla #99: a problem with
1941 PH/06 Added acl_not_smtp_start, based on Johannes Berg's patch, and set the
1942 bit to forbid control=suppress_local_fixups in the acl_not_smtp ACL,
1943 because it is too late at that time, and has no effect.
1945 PH/07 Changed ${quote_pgsql to quote ' as '' instead of \' because of a
1946 security issue with \' (bugzilla #107). I could not use the
1947 PQescapeStringConn() function, because it needs a PGconn value as one of
1950 PH/08 When testing addresses using -bt, indicate those final addresses that
1951 are duplicates that would not cause an additional delivery. At least one
1952 person was confused, thinking that -bt output corresponded to deliveries.
1953 (Suppressing duplicates isn't a good idea as you lose the information
1954 about possibly different redirections that led to the duplicates.)
1956 PH/09 Applied patch from Erik to use select() instead of poll() in spam.c on
1957 systems where poll() doesn't work, in particular OS X.
1959 PH/10 Added more information to debugging output for retry time not reached.
1961 PH/11 Applied patch from Arkadiusz Miskiewicz to apply a timeout to read
1962 operations in malware.c.
1964 PH/12 Applied patch from Magnus Holmgren to include the "h" tag in Domain Keys
1967 PH/13 If write_rejectlog was set false when logging was sent to syslog with
1968 syslog_duplication set false, log lines that would normally be written
1969 both the the main log and to the reject log were not written to syslog at
1972 PH/14 In the default configuration, change the use of "message" in ACL warn
1973 statements to "add_header".
1975 PH/15 Diagnose a filter syntax error for "seen", "unseen", or "noerror" if not
1976 not followed by a command (e.g. "seen endif").
1978 PH/16 Recognize SMTP codes at the start of "message" in ACLs and after :fail:
1979 and :defer: in a redirect router. Add forbid_smtp_code to suppress the
1982 PH/17 Added extra conditions to the default value of delay_warning_condition
1986 { !eq{$h_list-id:$h_list-post:$h_list-subscribe:}{} } \
1987 { match{$h_precedence:}{(?i)bulk|list|junk} } \
1988 { match{$h_auto-submitted:}{(?i)auto-generated|auto-replied} } \
1991 The Auto-Submitted: and various List- headers are standardised, whereas I
1992 don't think Precedence: ever was.
1994 PH/18 Refactored debugging code in route_finduser() to show more information,
1995 in particular, the error code if getpwnam() issues one.
1997 PH/19 Added PQsetClientEncoding(conn, "SQL_ASCII") to the pgsql code module.
1998 This is apparently needed in addition to the PH/07 change above to avoid
1999 any possible encoding problems.
2001 PH/20 Perl can change the locale. Exim was resetting it after a ${perl call,
2002 but not after initializing Perl.
2004 PH/21 Added a call to PQsetNoticeProcessor() to catch pgsql "notices" and
2005 output them only if debugging. By default they are written stderr,
2006 apparently, which is not desirable.
2008 PH/22 Added Alain Williams' LDAP patch to support setting REFERRALS=off on
2011 JJ/01 exipick: added --reverse (and -R synonym), --random, --size, --sort and
2014 JJ/02 exipick: rewrote --help documentation to hopefully make more clear.
2016 PH/23 Made -oMaa and -oMt work with -bh and -bs to pretend the connection is
2017 authenticated or an ident call has been made. Suppress the default
2018 values for $authenticated_id and $authenticated_sender (but permit -oMai
2019 and -oMas) when testing with -bh.
2021 PH/24 Re-jigged the order of the tests in the default configuration so that the
2022 tests for valid domains and recipients precede the DNS black list and CSA
2023 tests, on the grounds that those ones are more expensive.
2025 PH/25 Exim was not testing for a space following SMTP commands such as EHLO
2026 that require one. Thus, EHLORHUBARB was interpreted as a valid command.
2027 This bug exists in every version of Exim that I still have, right back to
2030 PH/26 (n)wildlsearch lookups are documented as being done case-insensitively.
2031 However, an attempt to turn on case-sensitivity in a regex key by
2032 including (?-i) didn't work because the subject string was already
2033 lowercased, and the effects were non-intuitive. It turns out that a
2034 one-line patch can be used to allow (?-i) to work as expected.
2040 TF/01 Fix the add_header change below (4.61 PH/55) which had a bug that (amongst
2041 other effects) broke the use of negated acl sub-conditions.
2043 PH/01 ${readsocket now supports Internet domain sockets (modified John Jetmore
2046 PH/02 When tcp-wrappers is called from Exim, it returns only "deny" or "allow".
2047 "Deny" causes Exim to reject the incoming connection with a 554 error.
2048 Unfortunately, if there is a major crisis, such as a disk failure,
2049 tcp-wrappers gives "deny", whereas what one would like would be some
2050 kind of temporary error. A kludge has been added to help with this.
2051 Before calling hosts_ctl(), errno is set zero. If the result is "deny", a
2052 554 error is used if errno is still zero or contains ENOENT (which occurs
2053 if either of the /etc/hosts.{allow,deny} files is missing). Otherwise, a
2056 PH/03 Add -lutil to the default FreeBSD LIBS setting.
2058 PH/04 Change PH/19 for 4.61 was too wide. It should not be applied to host
2059 errors. Otherwise a message that provokes a temporary error (when other
2060 messages do not) can cause a whole host to time out.
2062 PH/05 Batch deliveries by appendfile and pipe transports did not work when the
2063 addresses were routed directly to files or pipes from a redirect router.
2064 File deliveries just didn't batch; pipe deliveries might have suffered
2067 PH/06 A failure to get a lock for a hints database would erroneously always say
2068 "Failed to get write lock", even when it was really a read lock.
2070 PH/07 The appendfile transport was creating MBX lock files with a fixed mode
2071 of 0600. This has been changed to use the value of the lockfile_mode
2072 option (which defaults to 0600).
2074 PH/08 Applied small patch from the Sieve maintainer.
2076 PH/09 If maildir_quota_directory_regex was set to exclude (say) the .Trash
2077 folder from quota calculations, a direct delivery into this folder messed
2078 up the contents of the maildirsize file. This was because the regex was
2079 used only to exclude .Trash (or whatever) when the size of the mailbox
2080 was calculated. There was no check that a delivery was happening into an
2081 excluded directory. This bug has been fixed by ignoring all quota
2082 processing for deliveries into excluded directories.
2084 PH/10 Added the maildirfolder_create_regex option to appendfile.
2090 PH/01 The code for finding all the local interface addresses on a FreeBSD
2091 system running IPv6 was broken. This may well have applied to all BSD
2092 systems, as well as to others that have similar system calls. The broken
2093 code found IPv4 interfaces correctly, but gave incorrect values for the
2094 IPv6 interfaces. In particular, ::1 was not found. The effect in Exim was
2095 that it would not match correctly against @[] and not recognize the IPv6
2098 PH/02 The ipliteral router was not recognizing addresses of the form user@
2099 [ipv6:....] because it didn't know about the "ipv6:" prefix.
2101 PH/03 Added disable_ipv6.
2103 PH/04 Changed $reply_address to use the raw form of the headers instead of the
2104 decoded form, because it is most often used to construct To: headers
2105 lines in autoreplies, and the decoded form may well be syntactically
2106 invalid. However, $reply_address has leading white space removed, and all
2107 newlines turned into spaces so that the autoreply transport does not
2110 PH/05 If group was specified without a user on a router, and no group or user
2111 was specified on a transport, the group from the router was ignored.
2113 PH/06 Increased the number of ACL variables to 20 of each type, and arranged
2114 for visible compile-time settings that can be used to change these
2115 numbers, for those that want even more. Backwards compatibility with old
2116 spool files has been maintained. However, going back to a previous Exim
2117 release will lost any variables that are in spool files.
2119 PH/07 Two small changes when running in the test harness: increase delay when
2120 passing a TCP/IP connection to a new process, in case the original
2121 process has to generate a bounce, and remove special handling of
2122 127.0.0.2 (sic), which is no longer necessary.
2124 PH/08 Changed debug output of dbfn_open() flags from numbers to names, so as to
2125 be the same on different OS.
2127 PH/09 Moved a debug statement in filter processing to avoid a race problem when
2130 JJ/01 exipick: fixed bug where -b (brief) output option showed "Vars:"
2131 whether --show-vars was specified or not
2133 JJ/02 exipick: Added support for new ACL variable spool format introduced
2136 PH/10 Fixed another bug related to PH/04 above: if an incoming message had a
2137 syntactically invalid From: or Reply-to: line, and a filter used this to
2138 generate an autoreply, and therefore failed to obtain an address for the
2139 autoreply, Exim could try to deliver to a non-existent relative file
2140 name, causing unrelated and misleading errors. What now happens is that
2141 it logs this as a hard delivery error, but does not attempt to create a
2144 PH/11 The exinext utility has a -C option for testing purposes, but although
2145 the given file was scanned by exinext itself; it wasn't being passed on
2146 when Exim was called.
2148 PH/12 In the smtp transport, treat an explicit ECONNRESET error the same as
2149 an end-of-file indication when reading a command response.
2151 PH/13 Domain literals for IPv6 were not recognized unless IPv6 support was
2152 compiled. In many other places in Exim, IPv6 addresses are always
2153 recognized, so I have changed this. It also means that IPv4 domain
2154 literals of the form [IPV4:n.n.n.n] are now always recognized.
2156 PH/14 When a uid/gid is specified for the queryprogram router, it cannot be
2157 used if the router is not running as root, for example, when verifying at
2158 ACL time, or when using -bh. The debugging output from this situation was
2159 non-existent - all you got was a failure to exec. I have made two
2162 (a) Failures to set uid/gid, the current directory, or a process leader
2163 in a subprocess such as that created by queryprogram now generate
2164 suitable debugging ouput when -d is set.
2166 (b) The queryprogram router detects when it is not running as root,
2167 outputs suitable debugging information if -d is set, and then runs
2168 the subprocess without attempting to change uid/gid.
2170 PH/15 Minor change to Makefile for building test_host (undocumented testing
2173 PH/16 As discussed on the list in Nov/Dec: Exim no longer looks at the
2174 additional section of a DNS packet that returns MX or SRV records.
2175 Instead, it always explicitly searches for A/AAAA records. This avoids
2176 major problems that occur when a DNS server includes only records of one
2177 type (A or AAAA) in an MX/SRV packet. A byproduct of this change has
2178 fixed another bug: if SRV records were looked up and the corresponding
2179 address records were *not* found in the additional section, the port
2180 values from the SRV records were lost.
2182 PH/17 If a delivery to a pipe, file, or autoreply was deferred, Exim was not
2183 using the correct key (the original address) when searching the retry
2184 rules in order to find which one to use for generating the retry hint.
2186 PH/18 If quota_warn_message contains a From: header, Exim now refrains from
2187 adding the default one. Similarly, if it contains a Reply-To: header, the
2188 errors_reply_to option, if set, is not used.
2190 PH/19 When calculating a retry time, Exim used to measure the "time since
2191 failure" by looking at the "first failed" field in the retry record. Now
2192 it does not use this if it is later than than the arrival time of the
2193 message. Instead it uses the arrival time. This makes for better
2194 behaviour in cases where some deliveries succeed, thus re-setting the
2195 "first failed" field. An example is a quota failure for a huge message
2196 when small messages continue to be delivered. Without this change, the
2197 "time since failure" will always be short, possible causing more frequent
2198 delivery attempts for the huge message than are intended.
2199 [Note: This change was subsequently modified - see PH/04 for 4.62.]
2201 PH/20 Added $auth1, $auth2, $auth3 to contain authentication data (as well as
2202 $1, $2, $3) because the numerical variables can be reset during some
2203 expansion items (e.g. "match"), thereby losing the authentication data.
2205 PH/21 Make -bV show the size of off_t variables so that the test suite can
2206 decide whether to run tests for quotas > 2G.
2208 PH/22 Test the values given for quota, quota_filecount, quota_warn_threshold,
2209 mailbox_size, and mailbox_filecount in the appendfile transport. If a
2210 filecount value is greater than 2G or if a quota value is greater than 2G
2211 on a system where the size of off_t is not greater than 4, a panic error
2214 PH/23 When a malformed item such as 1.2.3/24 appears in a host list, it can
2215 never match. The debug and -bh output now contains an explicit error
2216 message indicating a malformed IPv4 address or mask.
2218 PH/24 An host item such as 1.2.3.4/abc was being treated as the IP address
2219 1.2.3.4 without a mask. Now it is not recognized as an IP address, and
2220 PH/23 above applies.
2222 PH/25 Do not write to syslog when running in the test harness. The only
2223 occasion when this arises is a failure to open the main or panic logs
2224 (for which there is an explicit test).
2226 PH/26 Added the /no_tell option to "control=freeze".
2228 PH/27 If a host name lookup failed very early in a connection, for example, if
2229 the IP address matched host_lookup and the reverse lookup yielded a name
2230 that did not have a forward lookup, an error message of the form "no IP
2231 address found for host xxx.xxx.xxx (during SMTP connection from NULL)"
2232 could be logged. Now it outputs the IP address instead of "NULL".
2234 PH/28 An enabling patch from MH: add new function child_open_exim2() which
2235 allows the sender and the authenticated sender to be set when
2236 submitting a message from within Exim. Since child_open_exim() is
2237 documented for local_scan(), the new function should be too.
2239 PH/29 In GnuTLS, a forced expansion failure for tls_privatekey was not being
2240 ignored. In both GnuTLS and OpenSSL, an expansion of tls_privatekey that
2241 results in an empty string is now treated as unset.
2243 PH/30 Fix eximon buffer overflow bug (Bugzilla #73).
2245 PH/31 Added sender_verify_fail logging option.
2247 PH/32 In November 2003, the code in Exim that added an empty Bcc: header when
2248 needed by RFC 822 but not by RFC 2822 was commented out. I have now
2249 tidied the source and removed it altogether.
2251 PH/33 When a queue run was abandoned because the load average was too high, a
2252 log line was always written; now it is written only if the queue_run log
2253 selector is set. In addition, the log line for abandonment now contains
2254 information about the queue run such as the pid. This is always present
2255 in "start" and "stop" lines but was omitted from the "abandon" line.
2257 PH/34 Omit spaces between a header name and the colon in the error message that
2258 is given when verify = headers_syntax fails (if there are lots of them,
2259 the message gets confusing).
2261 PH/35 Change the default for dns_check_names_pattern to allow slashes within
2262 names, as there are now some PTR records that contain slashes. This check
2263 is only to protect against broken name servers that fall over on strange
2264 characters, so the fact that it applies to all lookups doesn't matter.
2266 PH/36 Now that the new test suite is complete, we can remove some of the
2267 special code in Exim that was needed for the old test suite. For example,
2268 sorting DNS records because real resolvers return them in an arbitrary
2269 order. The new test suite's fake resolver always returns records in the
2272 PH/37 When running in the test harness, use -odi for submitted messages (e.g.
2273 bounces) except when queue_only is set, to avoid logging races between
2274 the different processes.
2276 PH/38 Panic-die if .include specifies a non-absolute path.
2278 PH/39 A tweak to the "H" retry rule from its user.
2280 JJ/03 exipick: Removed parentheses from 'next' and 'last' calls that specified
2281 a label. They prevented compilation on older perls.
2283 JJ/04 exipick: Refactored code to prevent implicit split to @_ which caused
2284 a warning to be raised on newish perls.
2286 JJ/05 exipick: Fixed bug where -bpc always showed a count of all messages
2287 on queue. Changes to match documented behaviour of showing count of
2288 messages matching specified criteria.
2290 PH/40 Changed the default ident timeout from 30s to 5s.
2292 PH/41 Added support for the use of login_cap features, on those BSD systems
2293 that have them, for controlling the resources used by pipe deliveries.
2295 PH/42 The content-scanning code uses fopen() to create files in which to put
2296 message data. Previously it was not paying any attention to the mode of
2297 the files. Exim runs with umask(0) because the rest of the code creates
2298 files with open(), and sets the required mode explicitly. Thus, these
2299 files were ending up world-writeable. This was not a big issue, because,
2300 being within the spool directory, they were not world-accessible. I have
2301 created a function called modefopen, which takes an additional mode
2302 argument. It sets umask(777), creates the file, chmods it to the required
2303 mode, then resets the umask. All the relevant calls to fopen() in the
2304 content scanning code have been changed to use this function.
2306 PH/43 If retry_interval_max is set greater than 24 hours, it is quietly reset
2307 to 24 hours. This avoids potential overflow problems when processing G
2308 and H retry rules. I suspect nobody ever tinkers with this value.
2310 PH/44 Added STRIP_COMMAND=/usr/bin/strip to the FreeBSD Makefile.
2312 PH/45 When the plaintext authenticator is running as a client, the server's
2313 challenges are checked to ensure they are valid base64 strings. By
2314 default, the authentication attempt is cancelled if an invalid string is
2315 received. Setting client_ignore_invalid_base64 true ignores these errors.
2316 The decoded challenge strings are now placed in $auth1, $auth2, etc. as
2317 they are received. Thus, the responses can be made to depend on the
2318 challenges. If an invalid string is ignored, an empty string is placed in
2321 PH/46 Messages that are created by the autoreply transport now contains a
2322 References: header, in accordance with RFCs 2822 and 3834.
2324 PH/47 Added authenticated_sender_force to the smtp transport.
2326 PH/48 The ${prvs expansion was broken on systems where time_t was long long.
2328 PH/49 Installed latest patch from the Sieve maintainer.
2330 PH/50 When an Exim quota was set without a file count quota, and mailbox_size
2331 was also set, the appendfile transport was unnecessarily scanning a
2332 directory of message files (e.g. for maildir delivery) to find the count
2333 of files (along with the size), even though it did not need this
2334 information. It now does the scan only if it needs to find either the
2335 size of the count of files.
2337 PH/51 Added ${time_eval: to convert Exim time strings into seconds.
2339 PH/52 Two bugs concerned with error handling when the smtp transport is
2342 (i) Exim was not creating retry information for temporary errors given
2343 for individual recipients after the DATA command when the smtp transport
2344 was used in LMTP mode. This meant that they could be retried too
2345 frequently, and not timed out correctly.
2347 (ii) Exim was setting the flag that allows error details to be returned
2348 for LMTP errors on RCPT commands, but not for LMTP errors for individual
2349 recipients that were returned after the DATA command.
2351 PH/53 This is related to PH/52, but is more general: for any failing address,
2352 when detailed error information was permitted to be returned to the
2353 sender, but the error was temporary, then after the final timeout, only
2354 "retry timeout exceeded" was returned. Now it returns the full error as
2355 well as "retry timeout exceeded".
2357 PH/54 Added control=allow_auth_unadvertised, as it seems there are clients that
2358 do this, and (what is worse) MTAs that accept it.
2360 PH/55 Added the add_header modified to ACLs. The use of "message" with "warn"
2361 will now be deprecated.
2363 PH/56 New os.c-cygwin from the Cygwin maintainer.
2365 JJ/06 exipick: added --unsorted option to allow unsorted output in all output
2366 formats (previously only available in exim formats via -bpr, -bpru,
2367 and -bpra. Now also available in native and exiqgrep formats)
2369 JJ/07 exipick: added --freeze and --thaw options to allow faster interaction
2370 with very large, slow to parse queues
2372 JJ/08 exipick: added ! as generic prefix to negate any criteria format
2374 JJ/09 exipick: miscellaneous performance enhancements (~24% improvements)
2376 PH/57 Tidies in SMTP dialogue display in debug output: (i) It was not showing
2377 responses to authentication challenges, though it was showing the
2378 challenges; (ii) I've removed the CR characters from the debug output for
2381 PH/58 Allow for the insertion of a newline as well as a space when a string
2382 is turned into more than one encoded-word during RFC 2047 encoding. The
2383 Sieve code now uses this.
2385 PH/59 Added the following errors that can be detected in retry rules: mail_4xx,
2386 data_4xx, lost_connection, tls_required.
2388 PH/60 When a VRFY deferred or FAILED, the log message rather than the user
2389 message was being sent as an SMTP response.
2391 PH/61 Add -l and -k options to exicyclog.
2393 PH/62 When verifying, if an address was redirected to one new address, so that
2394 verification continued, and the new address failed or deferred after
2395 having set something in $address_data, the value of $address_data was not
2396 passed back to the ACL. This was different to the case when no
2397 redirection occurred. The value is now passed back in both cases.
2399 PH/63 Changed the macro HAVE_LOGIN_CAP (see PH/41 for this release above) to
2400 HAVE_SETCLASSRESOURCES because there are different APIs in use that all
2401 use login_cap.h, so on its own it isn't the distinguishing feature. The
2402 new name refers directly to the setclassresources() function.
2404 PH/65 Added configuration files for NetBSD3.
2406 PH/66 Updated OS/Makefile-HP-UX for gcc 4.1.0 with HP-UX 11.
2408 PH/67 Fixed minor infelicity in the sorting of addresses to ensure that IPv6
2409 is preferred over IPv4.
2411 PH/68 The bounce_return_message and bounce_return_body options were not being
2412 honoured for bounces generated during the reception of non-SMTP messages.
2413 In particular, this applied to messages rejected by the ACL. This bug has
2414 been fixed. However, if bounce_return_message is true and bounce_return_
2415 body is false, the headers that are returned for a non-SMTP message
2416 include only those that have been read before the error was detected.
2417 (In the case of an ACL rejection, they have all been read.)
2419 PH/69 The HTML version of the specification is now built in a directory called
2420 spec_html instead of spec.html, because the latter looks like a path with
2421 a MIME-type, and this confuses some software.
2423 PH/70 Catch two compiler warnings in sieve.c.
2425 PH/71 Fixed an obscure and subtle bug (thanks Alexander & Matthias). The
2426 function verify_get_ident() calls ip_connect() to connect a socket, but
2427 if the "connect()" function timed out, ip_connect() used to close the
2428 socket. However, verify_get_ident() also closes the socket later, and in
2429 between Exim writes to the log, which may get opened at this point. When
2430 the socket was closed in ip_connect(), the log could get the same file
2431 descriptor number as the socket. This naturally causes chaos. The fix is
2432 not to close the socket in ip_connect(); the socket should be closed by
2433 the function that creates it. There was only one place in the code where
2434 this was missing, in the iplookup router, which I don't think anybody now
2435 uses, but I've fixed it anyway.
2437 PH/72 Make dns_again_means_nonexist apply to lookups using gethostbyname() as
2438 well as to direct DNS lookups. Otherwise the handling of names in host
2439 lists is inconsistent and therefore confusing.
2445 PH/01 Two changes to the default runtime configuration:
2447 (1) Move the checks for relay_from_hosts and authenticated clients from
2448 after to before the (commented out) DNS black list checks.
2450 (2) Add control=submission to the relay_from_hosts and authenticated
2451 clients checks, on the grounds that messages accepted by these
2452 statements are most likely to be submissions.
2454 PH/02 Several tidies to the handling of ${prvs and ${prvscheck:
2456 (1) Generate an error if the third argument for the ${prvs expansion is
2459 (2) Treat a missing third argument of ${prvscheck as if it were an empty
2462 (3) Reset the variables that are obtained from the first argument of
2463 ${prvscheck and used in the second argument before leaving the code,
2464 because their memory is reclaimed, so using them afterwards may do
2467 (4) Tidy up the code for expanding the arguments of ${prvscheck one by
2468 one (it's much easier than Tom thought :-).
2470 (5) Because of (4), we can now allow for the use of $prvscheck_result
2471 inside the third argument.
2473 PH/03 For some reason, the default setting of PATH when running a command from
2474 a pipe transport was just "/usr/bin". I have changed it to
2477 PH/04 SUPPORT_TRANSLATE_IP_ADDRESS and MOVE_FROZEN_MESSAGES did not cause
2478 anything to be listed in the output from -bV.
2480 PH/05 When a filter generated an autoreply, the entire To: header line was
2481 quoted in the delivery log line, like this:
2483 => >A.N.Other <ano@some.domain> <original@ddress> ...
2485 This has been changed so that it extracts the operative address. There
2486 may be more than one such address. If so, they are comma-separated, like
2489 => >ano@some.domain,ona@other.domain <original@ddress> ...
2491 PH/06 When a client host used a correct literal IP address in a HELO or EHLO
2492 command, (for example, EHLO [1.2.3.4]) and the client's IP address was
2493 not being looked up in the rDNS to get a host name, Exim was showing the
2494 IP address twice in Received: lines, even though the IP addresses were
2495 identical. For example:
2497 Received: from [1.2.3.4] (helo=[1.2.3.4])
2499 However, if the real host name was known, it was omitting the HELO data
2500 if it matched the actual IP address. This has been tidied up so that it
2501 doesn't show the same IP address twice.
2503 PH/07 When both +timestamp and +memory debugging was on, the value given by
2504 $tod_xxx expansions could be wrong, because the tod_stamp() function was
2505 called by the debug printing, thereby overwriting the timestamp buffer.
2506 Debugging no longer uses the tod_stamp() function when +timestamp is set.
2508 PH/08 When the original message was included in an autoreply transport, it
2509 always said "this is a copy of the message, including all the headers",
2510 even if body_only or headers_only was set. It now gives an appropriate
2513 PH/09 Applied a patch from the Sieve maintainer which:
2515 o fixes some comments
2516 o adds the (disabled) notify extension core
2517 o adds some debug output for the result of if/elsif tests
2518 o points to the current vacation draft in the documentation
2519 and documents the missing references header update
2523 o fixes a bug in processing the envelope test (when testing
2524 multiple envelope elements, the last element determinted the
2527 PH/10 Exim was violating RFC 3834 ("Recommendations for Automatic Responses to
2528 Electronic Mail") by including:
2530 Auto-submitted: auto-generated
2532 in the messages that it generates (bounce messages and others, such as
2533 warnings). In the case of bounce messages for non-SMTP mesages, there was
2534 also a typo: it was using "Auto_submitted" (underscore instead of
2535 hyphen). Since every message generated by Exim is necessarily in response
2536 to another message, thes have all been changed to:
2538 Auto-Submitted: auto-replied
2540 in accordance with these statements in the RFC:
2542 The auto-replied keyword:
2544 - SHOULD be used on messages sent in direct response to another
2545 message by an automatic process,
2547 - MUST NOT be used on manually-generated messages,
2549 - MAY be used on Delivery Status Notifications (DSNs) and Message
2550 Disposition Notifications (MDNs),
2552 - MUST NOT be used on messages generated by automatic or periodic
2553 processes, except for messages which are automatic responses to
2556 PH/11 Added "${if def:sender_address {(envelope-from <$sender_address>)\n\t}}"
2557 to the default Received: header definition.
2559 PH/12 Added log selector acl_warn_skipped (default on).
2561 PH/13 After a successful wildlsearch lookup, discard the values of numeric
2562 variables because (a) they are in the wrong storage pool and (b) even if
2563 they were copied, it wouldn't work properly because of the caching.
2565 PH/14 Add check_rfc2047_length to disable enforcement of RFC 2047 length
2566 checking when decoding. Apparently there are clients that generate
2567 overlong encoded strings. Why am I not surprised?
2569 PH/15 If the first argument of "${if match_address" was not empty, but did not
2570 contain an "@" character, Exim crashed. Now it writes a panic log message
2571 and treats the condition as false.
2573 PH/16 In autoreply, treat an empty string for "once" the same as unset.
2575 PH/17 A further patch from the Sieve maintainer: "Introduce the new Sieve
2576 extension "envelope-auth". The code is finished and in agreement with
2577 other implementations, but there is no documentation so far and in fact,
2578 nobody wrote the draft yet. This extension is currently #undef'ed, thus
2579 not changing the active code.
2581 Print executed "if" and "elsif" statements when debugging is used. This
2582 helps a great deal to understand what a filter does.
2584 Document more things not specified clearly in RFC3028. I had all this
2585 sorted out, when out of a sudden new issues came to my mind. Oops."
2587 PH/18 Exim was not recognizing the "net-" search type prefix in match_ip lists
2590 PH/19 Exim expands the IPv6 address given to -bh to its full non-abbreviated
2591 canonical form (as documented). However, after a host name lookup from
2592 the IP address, check_host() was doing a simple string comparison with
2593 addresses acquired from the DNS when checking that the found name did
2594 have the original IP as one of its addresses. Since any found IPv6
2595 addresses are likely to be in abbreviated form, the comparison could
2596 fail. Luckily, there already exists a function for doing the comparison
2597 by converting both addresses to binary, so now that is used instead of
2598 the text comparison.
2600 PH/20 There was another similar case to PH/19, when a complete host name was
2601 given in a host list; looking up its IP address could give an abbreviated
2602 form, whereas the current host's name might or might not be abbreviated.
2603 The same fix has been applied.
2609 PH/01 The ${base62: operator adjusted itself to base 36 when BASE_62 was
2610 set to 36 (for Darwin and Cygwin), but the ${base62d: operator did not.
2613 PH/02 Two minor problems detected in Cygwin: the os.{c,h} files had lost */ on
2614 the CVS lines, and there was a missing #if HAVE_IPV6 in host.c.
2616 PH/03 Typo: missing ".o" in src/pcre/Makefile.
2618 PH/04 Tighten up "personal" tests: Instead of testing for any "List-"
2619 header line, restrict the check to what is listed in RFCs 2369 and 2929.
2620 Also, for "Auto-Submitted", treat anything other than "no" as
2621 non-personal, in accordance with RFC 3834. (Previously it treated
2622 anything starting "auto-" as non-personal.)
2624 TF/01 The control=submission/name=... option had a problem with syntax
2625 errors if the name included a slash character. The /name= option
2626 now slurps the rest of the string, so it can include any characters
2627 but it must come last in the list of options (after /sender_retain
2630 PH/05 Some modifications to the interface to the fake nameserver for the new
2638 TK/01 Added the "success_on_redirect" address verification option. See
2639 NewStuff for rationale and an example.
2641 PH/01 Added support for SQLite, basic code supplied by David Woodhouse.
2643 PH/02 Patch to exigrep to allow it to work on syslog lines.
2645 PH/03 When creating an mbox file for a virus/spam scan, use fseek() instead of
2646 fread() to skip over the body file's header line, because in Cygwin the
2647 header line is locked and is inaccessible.
2649 PH/04 Added $message_exim_id, ultimately to replace $message_id (they will both
2650 co-exist for some time) to make it clear that it is the Exim ID that is
2651 referenced, not the Message-ID: header line.
2653 PH/05 Replaced all Tom's calls to snprintf() with calls to the internal
2654 string_format() function, because snprintf() does not exist on all
2657 PH/06 The use of forbid_filter_existstest now also locks out the use of the
2658 ${stat: expansion item.
2660 PH/07 Changed "SMTP protocol violation: synchronization error" into "SMTP
2661 protocol synchronization error", to keep the pedants happy.
2663 PH/08 Arrange for USE_INET_NTOA_FIX to be set in config.h for AIX systems as
2664 well as for IRIX systems, when gcc is being used. See the host.c source
2667 PH/09 Installed latest Cygwin configuration files from the Cygwin maintainer.
2669 PH/10 Named domain lists were not working if used in a queue_smtp_domains
2672 PH/11 Added support for the IGNOREQUOTA extension to LMTP, both to the lmtp
2673 transport and to the smtp transport in LMTP mode.
2675 TK/02 Remove one case of BASE64 error detection FTTB (undocumented anyway).
2677 PH/12 There was a missing call to search_tidyup() before the fork() in rda.c to
2678 run a filter in a subprocess. This could lead to confusion in subsequent
2679 lookups in the parent process. There should also be a search_tidyup() at
2680 the end of the subprocess.
2682 PH/13 Previously, if "verify = helo" was set in an ACL, the condition was true
2683 only if the host matched helo_try_verify_hosts, which caused the
2684 verification to occur when the EHLO/HELO command was issued. The ACL just
2685 tested the remembered result. Now, if a previous verification attempt has
2686 not happened, "verify = helo" does it there and then.
2688 JJ/01 exipick: added $message_exim_id variable (see 4.53-PH/04)
2690 TK/03 Fix log output including CR from clamd.
2692 PH/14 A reference to $reply_address when Reply-to: was empty and From: did not
2693 exist provoked a memory error which could cause a segfault.
2695 PH/15 Installed PCRE 6.2
2697 PH/17 Defined BIND_8_COMPAT in the Darwin os.h file.
2699 PH/18 Reversed 4.52/PH/17 because the HP-UX user found it wasn't the cause
2700 of the problem. Specifically, suggested +O2 rather than +O1 for the
2703 PH/19 Added sqlite_lock_timeout option (David Woodhouse's patch).
2705 PH/20 If a delivery was routed to a non-standard port by means of an SRV
2706 record, the port was not correctly logged when the outgoing_port log
2707 selector was set (it logged the transort's default port).
2709 PH/21 Added support for host-specific ports to manualroute, queryprogram,
2710 fallback_hosts, and "hosts" in the smtp transport.
2712 PH/22 If the log selector "outgoing_port" is set, the port is now also given on
2713 host errors such as "Connection refused".
2715 PH/23 Applied a patch to fix problems with exim-4.52 while doing radius
2716 authentication with radiusclient 0.4.9:
2718 - Error returned from rc_read_config was caught wrongly
2719 - Username/password not passed on to radius server due to wrong length.
2721 The presumption is that some radiusclient API changes for 4.51/PH/17
2722 were not taken care of correctly. The code is still untested by me (my
2723 Linux distribution still has 0.3.2 of radiusclient), but it was
2724 contributed by a Radius user.
2726 PH/24 When doing a callout, the value of $domain wasn't set correctly when
2727 expanding the "port" option of the smtp transport.
2729 TK/04 MIME ACL: Fix buffer underrun that occurs when EOF condition is met
2730 while reading a MIME header. Thanks to Tom Hughes for a patch.
2732 PH/24 Include config.h inside local_scan.h so that configuration settings are
2735 PH/25 Make $smtp_command_argument available after all SMTP commands. This means
2736 that in an ACL for RCPT (for example), you can examine exactly what was
2739 PH/26 Exim was recognizing IPv6 addresses of the form [IPv6:....] in EHLO
2740 commands, but it was not correctly comparing the address with the actual
2741 client host address. Thus, it would show the EHLO address in Received:
2742 header lines when this was not necessary.
2744 PH/27 Added the % operator to ${eval:}.
2746 PH/28 Exim tries to create and chdir to its spool directory when it starts;
2747 it should be ignoring failures (because with -C, for example, it has lost
2748 privilege). It wasn't ignoring creation failures other than "already
2751 PH/29 Added "crypteq" to the list of supported features that Exim outputs when
2754 PH/30 Fixed (presumably very longstanding) bug in exim_dbmbuild: if it failed
2755 because an input line was too long, either on its own, or by virtue of
2756 too many continuations, the temporary file was not being removed, and the
2757 return code was incorrect.
2759 PH/31 Missing "BOOL" in function definition in filtertest.c.
2761 PH/32 Applied Sieve patches from the maintainer.
2763 TK/05 Domainkeys: Accomodate for a minor API change in libdomainkeys 0.67.
2765 PH/33 Added "verify = not_blind".
2767 PH/34 There are settings for CHOWN_COMMAND and MV_COMMAND that can be used in
2768 Local/Makefile (with some defaults set). These are used in built scripts
2769 such as exicyclog, but they have never been used in the exim_install
2770 script (though there are many overriding facilities there). I have
2771 arranged that the exim_install script now takes note of these two
2774 PH/35 Installed configuration files for Dragonfly.
2776 PH/36 When a locally submitted message by a trusted user did not contain a
2777 From: header, and the sender address was obtained from -f or from an SMTP
2778 MAIL command, and the trusted user did not use -F to supply a sender
2779 name, $originator_name was incorrectly used when constructing a From:
2780 header. Furthermore, $originator_name was used for submission mode
2781 messages from external hosts without From: headers in a similar way,
2782 which is clearly wrong.
2784 PH/37 Added control=suppress_local_fixups.
2786 PH/38 When log_selector = +received_sender was set, and the addition of the
2787 sender made the log line's construction buffer exactly full, or one byte
2788 less than full, an overflow happened when the terminating "\n" was
2791 PH/39 Added a new log selector, "unknown_in_list", which provokes a log entry
2792 when the result of a list match is failure because a DNS lookup failed.
2794 PH/40 RM_COMMAND is now used in the building process.
2796 PH/41 Added a "distclean" target to the top-level Makefile; it deletes all
2797 the "build-* directories that it finds.
2799 PH/42 (But a TF fix): In a domain list, Exim incorrectly matched @[] if the IP
2800 address in a domain literal was a prefix of an interface address.
2802 PH/43 (Again a TF fix): In the dnslookup router, do not apply widen_domains
2803 when verifying a sender address, unless rewrite_headers is false.
2805 PH/44 Wrote a long comment about why errors_to addresses are verified as
2806 recipients, not senders.
2808 TF/01 Add missing LIBS=-lm to OS/Makefile-OpenBSD which was overlooked when
2809 the ratelimit ACL was added.
2811 PH/45 Added $smtp_command for the full command (cf $smtp_command_argument).
2813 PH/46 Added extra information about PostgreSQL errors to the error string.
2815 PH/47 Added an interface to a fake DNS resolver for use by the new test suite,
2816 avoiding the need to install special zones in a real server. This is
2817 backwards compatible; if it can't find the fake resolver, it drops back.
2818 Thus, both old and new test suites can be run.
2820 TF/02 Added util/ratelimit.pl
2822 TF/03 Minor fix to the ratelimit code to improve its behaviour in case the
2823 clock is set back in time.
2825 TF/04 Fix the ratelimit support in exim_fixdb. Patch provided by Brian
2826 Candler <B.Candler@pobox.com>.
2828 TF/05 The fix for PH/43 was not completely correct; widen_domains is always
2829 OK for addresses that are the result of redirections.
2831 PH/48 A number of further additions for the benefit of the new test suite,
2832 including a fake gethostbyname() that interfaces to the fake DNS resolver
2835 TF/06 The fix for widen_domains has also been applied to qualify_single and
2836 search_parents which are the other dnslookup options that can cause
2839 PH/49 Michael Haardt's randomized retrying, but as a separate retry parameter
2842 PH/50 Make never_users, trusted_users, admin_groups, trusted_groups expandable.
2844 TF/07 Exim produced the error message "an SRV record indicated no SMTP
2845 service" if it encountered an MX record with an empty target hostname.
2846 The message is now "an MX or SRV record indicated no SMTP service".
2848 TF/08 Change PH/13 introduced the possibility that verify=helo may defer,
2849 if the DNS of the sending site is misconfigured. This is quite a
2850 common situation. This change restores the behaviour of treating a
2851 helo verification defer as a failure.
2853 PH/51 If self=fail was set on a router, the bounce message did not include the
2854 actual error message.
2860 TF/01 Added support for Client SMTP Authorization. See NewStuff for details.
2862 PH/01 When a transport filter timed out in a pipe delivery, and the pipe
2863 command itself ended in error, the underlying message about the transport
2864 filter timeout was being overwritten with the pipe command error. Now the
2865 underlying error message should be appended to the second error message.
2867 TK/01 Fix poll() being unavailable on Mac OSX 10.2.
2869 PH/02 Reduce the amount of output that "make" produces by default. Full output
2870 can still be requested.
2872 PH/03 The warning log line about a condition test deferring for a "warn" verb
2873 was being output only once per connection, rather than after each
2874 occurrence (because it was using the same function as for successful
2875 "warn" verbs). This seems wrong, so I have changed it.
2877 TF/02 Two buglets in acl.c which caused Exim to read a few bytes of memory that
2878 it should not have, which might have caused a crash in the right
2879 circumstances, but probably never did.
2881 PH/04 Installed a modified version of Tony Finch's patch to make submission
2882 mode fix the return path as well as the Sender: header line, and to
2883 add a /name= option so that you can make the user's friendly name appear
2886 TF/03 Added the control = fakedefer ACL modifier.
2888 TF/04 Added the ratelimit ACL condition. See NewStuff for details. Thanks to
2889 Mark Lowes for thorough testing.
2891 TK/02 Rewrote SPF support to work with libspf2 versions >1.2.0.
2893 TK/03 Merged latest SRS patch from Miles Wilton.
2895 PH/05 There's a shambles in IRIX6 - it defines EX_OK in unistd.h which conflicts
2896 with the definition in sysexits.h (which is #included earlier).
2897 Fortunately, Exim does not actually use EX_OK. The code used to try to
2898 preserve the sysexits.h value, by assumimg that macro definitions were
2899 scanned for macro replacements. I have been disabused of this notion,
2900 so now the code just undefines EX_OK before #including unistd.h.
2902 PH/06 There is a timeout for writing blocks of data, set by, e.g. data_timeout
2903 in the smtp transport. When a block could not be written in a single
2904 write() function, the timeout was being re-applied to each part-write.
2905 This seems wrong - if the receiver was accepting one byte at a time it
2906 would take for ever. The timeout is now adjusted when this happens. It
2907 doesn't have to be particularly precise.
2909 TK/04 Added simple SPF lookup method in EXPERIMENTAL_SPF. See NewStuff for
2910 details. Thanks to Chris Webb <chris@arachsys.com> for the patch!
2912 PH/07 Added "fullpostmaster" verify option, which does a check to <postmaster>
2913 without a domain if the check to <postmaster@domain> fails.
2915 SC/01 Eximstats: added -xls and the ability to specify output files
2916 (patch written by Frank Heydlauf).
2918 SC/02 Eximstats: use FileHandles for outputing results.
2920 SC/03 Eximstats: allow any combination of xls, txt, and html output.
2922 SC/04 Eximstats: fixed display of large numbers with -nvr option
2924 SC/05 Eximstats: fixed merging of reports with empty tables.
2926 SC/06 Eximstats: added the -include_original_destination flag
2928 SC/07 Eximstats: removed tabs and trailing whitespace.
2930 TK/05 Malware: Improve on aveserver error handling. Patch from Alex Miller.
2932 TK/06 MBOX spool code: Add real "From " MBOX separator line
2933 so the .eml file is really in mbox format (even though
2934 most programs do not really care). Patch from Alex Miller.
2936 TK/07 MBOX spool code: Add X-Envelope-From: and X-Envelope-To: headers.
2937 The latter is generated from $received_to and is only set if the
2938 message has one envelope recipient. SA can use these headers,
2939 obviously out-of-the-box. Patch from Alex Miller.
2941 PH/08 The ${def test on a variable was returning false if the variable's
2942 value was "0", contrary to what the specification has always said!
2943 The result should be true unless the variable is empty.
2945 PH/09 The syntax error of a character other than { following "${if
2946 def:variable_name" (after optional whitespace) was not being diagnosed.
2947 An expansion such as ${if def:sender_ident:{xxx}{yyy}} in which an
2948 accidental colon was present, for example, could give incorrect results.
2950 PH/10 Tidied the code in a number of places where the st_size field of a stat()
2951 result is used (not including appendfile, where other changes are about
2954 PH/11 Upgraded appendfile so that quotas larger than 2G are now supported.
2955 This involved changing a lot of size variables from int to off_t. It
2956 should work with maildirs and everything.
2958 TK/08 Apply fix provided by Michael Haardt to prevent deadlock in case of
2959 spamd dying while we are connected to it.
2961 TF/05 Fixed a ${extract error message typo reported by Jeremy Harris
2964 PH/12 Applied Alex Kiernan's patch for the API change for the error callback
2965 function for BDB 4.3.
2967 PH/13 Changed auto_thaw such that it does not apply to bounce messages.
2969 PH/14 Imported PCRE 6.0; this was more than just a trivial operation because
2970 the sources for PCRE have been re-arranged and more files are now
2973 PH/15 The code I had for printing potentially long long variables in PH/11
2974 above was not the best (it lost precision). The length of off_t variables
2975 is now inspected at build time, and an appropriate printing format (%ld
2976 or %lld) is chosen and #defined by OFF_T_FMT. We also define LONGLONG_T
2977 to be "long long int" or "long int". This is needed for the internal
2978 formatting function string_vformat().
2980 PH/16 Applied Matthew Newton's patch to exicyclog: "If log_file_path is set in
2981 the configuration file to be ":syslog", then the script "guesses" where
2982 the logs files are, rather than using the compiled in default. In our
2983 case the guess is not the same as the compiled default, so the script
2984 suddenly stopped working when I started to use syslog. The patch checks
2985 to see if log_file_path is "". If so, it attempts to read it from exim
2986 with no configuration file to get the compiled in version, before it
2987 falls back to the previous guessing code."
2989 TK/09 Added "prvs" and "prvscheck" expansion items. These help a lot with
2990 implementing BATV in an Exim configuration. See NewStuff for the gory
2993 PH/17 Applied Michael Haardt's patch for HP-UX, affecting only the os.h and
2994 Makefile that are specific to HP-UX.
2996 PH/18 If the "use_postmaster" option was set for a recipient callout together
2997 with the "random" option, the postmaster address was used as the MAIL
2998 FROM address for the random test, but not for the subsequent recipient
2999 test. It is now used for both.
3001 PH/19 Applied Michael Haardt's patch to update Sieve to RFC3028bis. "The
3002 patch removes a few documentation additions to RFC 3028, because the
3003 latest draft now contains them. It adds the new en;ascii-case comparator
3004 and a new error check for 8bit text in MIME parts. Comparator and
3005 require names are now matched exactly. I enabled the subaddress
3006 extension, but it is not well tested yet (read: it works for me)."
3008 PH/20 Added macros for time_t as for off_t (see PH/15 above) and used them to
3009 rework some of the code of TK/09 above to avoid the hardwired use of
3010 "%lld" and "long long". Replaced the call to snprintf() with a call to
3013 PH/21 Added some other messages to those in 4.51/PH/42, namely "All relevant MX
3014 records point to non-existent hosts", "retry timeout exceeded", and
3015 "retry time not reached for any host after a long failure period".
3017 PH/22 Fixed some oversights/typos causing bugs when Exim is compiled with
3018 experimental DomainKeys support:
3020 (1) The filter variables $n0-$n9 and $sn0-$sn9 were broken.
3021 (2) On an error such as an illegally used "control", the wrong name for
3022 the control was given.
3024 These problems did NOT occur unless DomainKeys support was compiled.
3026 PH/23 Added daemon_startup_retries and daemon_startup_sleep.
3028 PH/24 Added ${if match_ip condition.
3030 PH/25 Put debug statements on either side of calls to EXIM_DBOPEN() for hints
3031 databases so that it will be absolutely obvious if a crash occurs in the
3032 DB library. This is a regular occurrence (often caused by mis-matched
3035 PH/26 Insert a lot of missing (void) casts for functions such as chown(),
3036 chmod(), fcntl(), sscanf(), and other functions from stdio.h. These were
3037 picked up on a user's system that detects such things. There doesn't seem
3038 to be a gcc warning option for this - only an attribute that has to be
3039 put on the function's prototype. It seems that in Fedora Core 4 they have
3040 set this on a number of new functions. No doubt there will be more in due
3043 PH/27 If a dnslookup or manualroute router is set with verify=only, it need not
3044 specify a transport. However, if an address that was verified by such a
3045 router was the subject of a callout, Exim crashed because it tried to
3046 read the rcpt_include_affixes from the non-existent transport. Now it
3047 just assumes that the setting of that option is false. This bug was
3048 introduced by 4.51/PH/31.
3050 PH/28 Changed -d+all to exclude +memory, because that information is very
3051 rarely of interest, but it makes the output a lot bigger. People tend to
3052 do -d+all out of habit.
3054 PH/29 Removed support for the Linux-libc5 build, as it is obsolete and the
3055 code in os-type was giving problems when libc.so lives in lib64, like on
3058 PH/30 Exim's DNS code uses the original T_xxx names for DNS record times. These
3059 aren't the modern standard, and it seems that some systems' include files
3060 don't always have them. Exim was already checking for some of the newer
3061 ones like T_AAAA, and defining it itself. I've added checks for all the
3062 record types that Exim uses.
3064 PH/31 When using GnuTLS, if the parameters cache file did not exist, Exim was
3065 not automatically generating a new one, as it is supposed to. This
3066 prevented TLS from working. If the file did exist, but contained invalid
3067 data, a new version was generated, as expected. It was only the case of a
3068 non-existent file that was broken.
3070 TK/10 Domainkeys: Fix a bug in verification that caused a crash in conjunction
3071 with a change in libdomainkeys > 0.64.
3073 TK/11 Domainkeys: Change the logic how the "testing" policy flag is retrieved
3074 from DNS. If the selector record carries the flag, it now has
3075 precedence over the domain-wide flag.
3077 TK/12 Cleared some compiler warnings related to SPF, SRS and DK code.
3079 PH/32 In mua_wrapper mode, if an smtp transport configuration error (such as
3080 the use of a port name that isn't defined in /etc/services) occurred, the
3081 message was deferred as in a normal delivery, and thus remained on the
3082 spool, instead of being failed because of the mua_wrapper setting. This
3083 is now fixed, and I tidied up some of the mua_wrapper messages at the
3086 SC/08 Eximstats: whilst parsing the mainlog(s), store information about
3087 the messages in a hash of arrays rather than using individual hashes.
3088 This is a bit cleaner and results in dramatic memory savings, albeit
3089 at a slight CPU cost.
3091 SC/09 Eximstats: added the -show_rt<list> and the -show_dt<list> flags
3092 as requested by Marc Sherman.
3094 SC/10 Eximstats: added histograms for user specified patterns as requested
3097 SC/11 Eximstats: v1.43 - bugfix for pattern histograms with -h0 specified.
3099 PH/33 Patch from the Cygwin maintainer to add "b" to all occurences of
3100 fopen() in the content-scanning modules that did not already have it.
3106 TK/01 Added Yahoo DomainKeys support via libdomainkeys. See
3107 doc/experimental-spec.txt for details. (http://domainkeys.sf.net)
3109 TK/02 Fix ACL "control" statement not being available in MIME ACL.
3111 TK/03 Fix ACL "regex" condition not being available in MIME ACL.
3113 PH/01 Installed a patch from the Sieve maintainer that allows -bf to be used
3114 to test Sieve filters that use "vacation".
3116 PH/02 Installed a slightly modified version of Nikos Mavrogiannopoulos' patch
3117 that changes the way the GnuTLS parameters are stored in the cache file.
3118 The new format can be generated externally. For backward compatibility,
3119 if the data in the cache doesn't make sense, Exim assumes it has read an
3120 old-format file, and it generates new data and writes a new file. This
3121 means that you can't go back to an older release without removing the
3124 PH/03 A redirect router that has both "unseen" and "one_time" set does not
3125 work if there are any delivery delays because "one_time" forces the
3126 parent to be marked "delivered", so its unseen clone is never tried
3127 again. For this reason, Exim now forbids the simultaneous setting of
3130 PH/04 Change 4.11/85 fixed an obscure bug concerned with addresses that are
3131 redirected to themselves ("homonym" addresses). Read the long ChangeLog
3132 entry if you want to know the details. The fix, however, neglected to
3133 consider the case when local delivery batching is involved. The test for
3134 "previously delivered" was not happening when checking to see if an
3135 address could be batched with a previous (undelivered) one; under
3136 certain circumstances this could lead to multiple deliveries to the same
3139 PH/05 Renamed the macro SOCKLEN_T as EXIM_SOCKLEN_T because AIX uses SOCKLEN_T
3140 in its include files, and this causes problems building Exim.
3142 PH/06 A number of "verify =" ACL conditions have no options (e.g. verify =
3143 header_syntax) but Exim was just ignoring anything given after a slash.
3144 In particular, this caused confusion with an attempt to use "verify =
3145 reverse_host_lookup/defer_ok". An error is now given when options are
3146 supplied for verify items that do not have them. (Maybe reverse_host_
3147 lookup should have a defer_ok option, but that's a different point.)
3149 PH/07 Increase the size of the buffer for incoming SMTP commands from 512 (as
3150 defined by RFC 821) to 2048, because there were problems with some AUTH
3151 commands, and RFC 1869 says the size should be increased for extended
3152 SMTP commands that take arguments.
3154 PH/08 Added ${dlfunc dynamically loaded function for expansion (code from Tony
3157 PH/09 Previously, an attempt to use ${perl when it wasn't compiled gave an
3158 "unknown" error; now it says that the functionality isn't in the binary.
3160 PH/10 Added a nasty fudge to try to recognize and flatten LDAP passwords in
3161 an address' error message when a string expansion fails (syntax or
3162 whatever). Otherwise the password may appear in the log. Following change
3163 PH/42 below, there is no longer a chance of it appearing in a bounce
3166 PH/11 Installed exipick version 20050225.0 from John Jetmore.
3168 PH/12 If the last host in a fallback_hosts list was multihomed, only the first
3169 of its addresses was ever tried. (Bugzilla bug #2.)
3171 PH/13 If "headers_add" in a transport didn't end in a newline, Exim printed
3172 the result incorrectly in the debug output. (It correctly added a newline
3173 to what was transported.)
3175 TF/01 Added $received_time.
3177 PH/14 Modified the default configuration to add an acl_smtp_data ACL, with
3178 commented out examples of how to interface to a virus scanner and to
3179 SpamAssassin. Also added commented examples of av_scanner and
3180 spamd_address settings.
3182 PH/15 Further to TK/02 and TK/03 above, tidied up the tables of what conditions
3183 and controls are allowed in which ACLs. There were a couple of minor
3184 errors. Some of the entries in the conditions table (which is a table of
3185 where they are NOT allowed) were getting very unwieldy; rewrote them as a
3186 negation of where the condition IS allowed.
3188 PH/16 Installed updated OS/os.c-cygwin from the Cygwin maintainer.
3190 PH/17 The API for radiusclient changed at release 0.4.0. Unfortunately, the
3191 header file does not have a version number, so I've had to invent a new
3192 value for RADIUS_LIB_TYPE, namely "RADIUSCLIENTNEW" to request the new
3193 API. The code is untested by me (my Linux distribution still has 0.3.2 of
3194 radiusclient), but it was contributed by a Radius user.
3196 PH/18 Installed Lars Mainka's patch for the support of CRL collections in
3197 files or directories, for OpenSSL.
3199 PH/19 When an Exim process that is running as root has to create an Exim log
3200 file, it does so in a subprocess that runs as exim:exim so as to get the
3201 ownership right at creation (otherwise, other Exim processes might see
3202 the file with the wrong ownership). There was no test for failure of this
3203 fork() call, which would lead to the process getting stuck as it waited
3204 for a non-existent subprocess. Forks do occasionally fail when resources
3205 run out. I reviewed all the other calls to fork(); they all seem to check
3208 PH/20 When checking for unexpected SMTP input at connect time (before writing
3209 the banner), Exim was not dealing correctly with a non-positive return
3210 from the read() function. If the client had disconnected by this time,
3211 the result was a log entry for a synchronization error with an empty
3212 string after "input=" when read() returned zero. If read() returned -1
3213 (an event I could not check), uninitialized data bytes were printed.
3214 There were reports of junk text (parts of files, etc) appearing after
3217 PH/21 Added acl_not_smtp_mime to allow for MIME scanning for non-SMTP messages.
3219 PH/22 Added support for macro redefinition, and (re)definition in between
3220 driver and ACL definitions.
3222 PH/23 The cyrus_sasl authenticator was expanding server_hostname, but then
3223 forgetting to use the resulting value; it was using the unexpanded value.
3225 PH/24 The cyrus_sasl authenticator was advertising mechanisms for which it
3226 hadn't been configured. The fix is from Juergen Kreileder, who
3227 understands it better than I do:
3229 "Here's what I see happening with three configured cyrus_sasl
3230 authenticators configured (plain, login, cram-md5):
3232 On startup auth_cyrus_sasl_init() gets called for each of these.
3233 This means three calls to sasl_listmech() without a specified mech_list.
3234 => SASL tests which mechs of all available mechs actually work
3235 => three warnings about OTP not working
3236 => the returned list contains: plain, login, cram-md5, digest-md5, ...
3238 With the patch, sasl_listmech() also gets called three times. But now
3239 SASL's mech_list option is set to the server_mech specified in the the
3240 authenticator. Or in other words, the answer from sasl_listmech()
3241 gets limited to just the mech you're testing for (which is different
3243 => the return list contains just 'plain' or 'login', 'cram-md5' or
3244 nothing depending on the value of ob->server_mech.
3246 I've just tested the patch: Authentication still works fine,
3247 unavailable mechs specified in the exim configuration are still
3248 caught, and the auth.log warnings about OTP are gone."
3250 PH/25 When debugging is enabled, the contents of the command line are added
3251 to the debugging output, even when log_selector=+arguments is not
3254 PH/26 Change scripts/os-type so that when "uname -s" returns just "GNU", the
3255 answer is "GNU", and only if the return is "GNU/something" is the answer
3258 PH/27 $acl_verify_message is now set immediately after the failure of a
3259 verification in an ACL, and so is available in subsequent modifiers. In
3260 particular, the message can be preserved by coding like this:
3262 warn !verify = sender
3263 set acl_m0 = $acl_verify_message
3265 Previously, $acl_verify_message was set only while expanding "message"
3266 and "log_message" when a very denied access.
3268 PH/28 Modified OS/os.c-Linux with
3270 -#ifndef OS_LOAD_AVERAGE
3271 +#if !defined(OS_LOAD_AVERAGE) && defined(__linux__)
3273 to make Exim compile on kfreebsd-gnu. (I'm totally confused about the
3274 nomenclature these days.)
3276 PH/29 Installed patch from the Sieve maintainer that adds the options
3277 sieve_useraddress and sieve_subaddress to the redirect router.
3279 PH/30 In these circumstances:
3280 . Two addresses routed to the same list of hosts;
3281 . First host does not offer TLS;
3282 . First host accepts first address;
3283 . First host gives temporary error to second address;
3284 . Second host offers TLS and a TLS session is established;
3285 . Second host accepts second address.
3286 Exim incorrectly logged both deliveries with the TLS parameters (cipher
3287 and peerdn, if requested) that were in fact used only for the second
3290 PH/31 When doing a callout as part of verifying an address, Exim was not paying
3291 attention to any local part prefix or suffix that was matched by the
3292 router that accepted the address. It now behaves in the same way as it
3293 does for delivery: the affixes are removed from the local part unless
3294 rcpt_include_affixes is set on the transport.
3296 PH/32 Add the sender address, as F=<...>, to the log line when logging a
3297 timeout during the DATA phase of an incoming message.
3299 PH/33 Sieve envelope tests were broken for match types other than :is. I have
3300 applied a patch sanctioned by the Sieve maintainer.
3302 PH/34 Change 4.50/80 broke Exim in that it could no longer handle cases where
3303 the uid or gid is negative. A case of a negative gid caused this to be
3304 noticed. The fix allows for either to be negative.
3306 PH/35 ACL_WHERE_MIME is now declared unconditionally, to avoid too much code
3307 clutter, but the tables that are indexed by ACL_WHERE_xxx values had been
3310 PH/36 The change PH/12 above was broken. Fixed it.
3312 PH/37 Exim used to check for duplicate addresses in the middle of routing, on
3313 the grounds that routing the same address twice would always produce the
3314 same answer. This might have been true once, but it is certainly no
3315 longer true now. Routing a child address may depend on the previous
3316 routing that produced that child. Some complicated redirection strategies
3317 went wrong when messages had multiple recipients, and made Exim's
3318 behaviour dependent on the order in which the addresses were given.
3320 I have moved the duplicate checking until after the routing is complete.
3321 Exim scans the addresses that are assigned to local and remote
3322 transports, and removes any duplicates. This means that more work will be
3323 done, as duplicates will always all be routed, but duplicates are
3324 presumably rare, so I don't expect this is of any significance.
3326 For deliveries to pipes, files, and autoreplies, the duplicate checking
3327 still happens during the routing process, since they are not going to be
3330 PH/38 Installed a patch from Ian Freislich, with the agreement of Tom Kistner.
3331 It corrects a timeout issue with spamd. This is Ian's comment: "The
3332 background is that sometimes spamd either never reads data from a
3333 connection it has accepted, or it never writes response data. The exiscan
3334 spam.[ch] uses a 3600 second timeout on spamd socket reads, further, it
3335 blindly assumes that writes won't block so it may never time out."
3337 PH/39 Allow G after quota size as well as K and M.
3339 PH/40 The value set for $authenticated_id in an authenticator may not contain
3340 binary zeroes or newlines because the value is written to log lines and
3341 to spool files. There was no check on this. Now the value is run through
3342 the string_printing() function so that such characters are converted to
3343 printable escape sequences.
3345 PH/41 $message_linecount is a new variable that contains the total number of
3346 lines in the message. Compare $body_linecount, which is the count for the
3349 PH/42 Exim no longer gives details of delivery errors for specific addresses in
3350 bounce and delay warning messages, except in certain special cases, which
3353 (a) An SMTP error message from a remote host;
3354 (b) A message specified in a :fail: redirection;
3355 (c) A message specified in a "fail" command in a system filter;
3356 (d) A message specified in a FAIL return from the queryprogram router;
3357 (e) A message specified by the cannot_route_message router option.
3359 In these cases only, Exim does include the error details in bounce and
3360 warning messages. There are also a few cases where bland messages such
3361 as "unrouteable address" or "local delivery error" are given.
3363 PH/43 $value is now also set for the "else" part of a ${run expansion.
3365 PH/44 Applied patch from the Sieve maintainer: "The vacation draft is still
3366 being worked on, but at least Exim now implements the latest version to
3369 PH/45 In a pipe transport, although a timeout while waiting for the pipe
3370 process to complete was treated as a delivery failure, a timeout while
3371 writing the message to the pipe was logged, but erroneously treated as a
3372 successful delivery. Such timeouts include transport filter timeouts. For
3373 consistency with the overall process timeout, these timeouts are now
3374 treated as errors, giving rise to delivery failures by default. However,
3375 there is now a new Boolean option for the pipe transport called
3376 timeout_defer, which, if set TRUE, converts the failures into defers for
3377 both kinds of timeout. A transport filter timeout is now identified in
3380 PH/46 The "scripts/Configure-config.h" script calls "make" at one point. On
3381 systems where "make" and "gmake" are different, calling "gmake" at top
3382 level broke things. I've arranged for the value of $(MAKE) to be passed
3383 from the Makefile to this script so that it can call the same version of
3387 A note about Exim versions 4.44 and 4.50
3388 ----------------------------------------
3390 Exim 4.50 was meant to be the next release after 4.43. It contains a lot of
3391 changes of various kinds. As a consequence, a big documentation update was
3392 needed. This delayed the release for rather longer than seemed good, especially
3393 in the light of a couple of (minor) security issues. Therefore, the changes
3394 that fixed bugs were backported into 4.43, to create a 4.44 maintenance
3395 release. So 4.44 and 4.50 are in effect two different branches that both start
3398 I have left the 4.50 change log unchanged; it contains all the changes since
3399 4.43. The change log for 4.44 is below; many of its items are identical to
3400 those for 4.50. This seems to be the most sensible way to preserve the
3401 historical information.
3407 1. Minor wording change to the doc/README.SIEVE file.
3409 2. Change 4.43/35 introduced a bug: if quota_filecount was set, the
3410 computation of the current number of files was incorrect.
3412 3. Closing a stable door: arrange to panic-die if setitimer() ever fails. The
3413 bug fixed in 4.43/37 would have been diagnosed quickly if this had been in
3416 4. Give more explanation in the error message when the command for a transport
3417 filter fails to execute.
3419 5. There are several places where Exim runs a non-Exim command in a
3420 subprocess. The SIGUSR1 signal should be disabled for these processes. This
3421 was being done only for the command run by the queryprogram router. It is
3422 now done for all such subprocesses. The other cases are: ${run, transport
3423 filters, and the commands run by the lmtp and pipe transports.
3425 6. Added CONFIGURE_GROUP build-time option.
3427 7. Some older OS have a limit of 256 on the maximum number of file
3428 descriptors. Exim was using setrlimit() to set 1000 as a large value
3429 unlikely to be exceeded. Change 4.43/17 caused a lot of logging on these
3430 systems. I've change it so that if it can't get 1000, it tries for 256.
3432 8. "control=submission" was allowed, but had no effect, in a DATA ACL. This
3433 was an oversight, and furthermore, ever since the addition of extra
3434 controls (e.g. 4.43/32), the checks on when to allow different forms of
3435 "control" were broken. There should now be diagnostics for all cases when a
3436 control that does not make sense is encountered.
3438 9. Added the /retain_sender option to "control=submission".
3440 10. $recipients is now available in the predata ACL (oversight).
3442 11. Tidy the search cache before the fork to do a delivery from a message
3443 received from the command line. Otherwise the child will trigger a lookup
3444 failure and thereby defer the delivery if it tries to use (for example) a
3445 cached ldap connection that the parent has called unbind on.
3447 12. If verify=recipient was followed by verify=sender in a RCPT ACL, the value
3448 of $address_data from the recipient verification was clobbered by the
3449 sender verification.
3451 13. The value of address_data from a sender verification is now available in
3452 $sender_address_data in subsequent conditions in the ACL statement.
3454 14. Added forbid_sieve_filter and forbid_exim_filter to the redirect router.
3456 15. Added a new option "connect=<time>" to callout options, to set a different
3459 16. If FIXED_NEVER_USERS was defined, but empty, Exim was assuming the uid 0
3460 was its contents. (It was OK if the option was not defined at all.)
3462 17. A "Completed" log line is now written for messages that are removed from
3463 the spool by the -Mrm option.
3465 18. New variables $sender_verify_failure and $recipient_verify_failure contain
3466 information about exactly what failed.
3468 19. Added -dd to debug only the daemon process.
3470 20. Incorporated Michael Haardt's patch to ldap.c for improving the way it
3471 handles timeouts, both on the server side and network timeouts. Renamed the
3472 CONNECT parameter as NETTIMEOUT (but kept the old name for compatibility).
3474 21. The rare case of EHLO->STARTTLS->HELO was setting the protocol to "smtp".
3475 It is now set to "smtps".
3477 22. $host_address is now set to the target address during the checking of
3478 ignore_target_hosts.
3480 23. When checking ignore_target_hosts for an ipliteral router, no host name was
3481 being passed; this would have caused $sender_host_name to have been used if
3482 matching the list had actually called for a host name (not very likely,
3483 since this list is usually IP addresses). A host name is now passed as
3486 24. Changed the calls that set up the SIGCHLD handler in the daemon to use the
3487 code that specifies a non-restarting handler (typically sigaction() in
3488 modern systems) in an attempt to fix a rare and obscure crash bug.
3490 25. Narrowed the window for a race in the daemon that could cause it to ignore
3491 SIGCHLD signals. This is not a major problem, because they are used only to
3492 wake it up if nothing else does.
3494 26. A malformed maildirsize file could cause Exim to calculate negative values
3495 for the mailbox size or file count. Odd effects could occur as a result.
3496 The maildirsize information is now recalculated if the size or filecount
3499 27. Added HAVE_SYS_STATVFS_H to the os.h file for Linux, as it has had this
3500 support for a long time. Removed HAVE_SYS_VFS_H.
3502 28. Installed the latest version of exipick from John Jetmore.
3504 29. In an address list, if the pattern was not a regular expression, an empty
3505 subject address (from a bounce message) matched only if the pattern was an
3506 empty string. Non-empty patterns were not even tested. This was the wrong
3507 because it is perfectly reasonable to use an empty address as part of a
3508 database query. An empty address is now tested by patterns that are
3509 lookups. However, all the other forms of pattern expect the subject to
3510 contain a local part and a domain, and therefore, for them, an empty
3511 address still always fails if the pattern is not itself empty.
3513 30. Exim went into a mad DNS loop when attempting to do a callout where the
3514 host was specified on an smtp transport, and looking it up yielded more
3515 than one IP address.
3517 31. Re-factored the code for checking spool and log partition space into a
3518 function that finds that data and another that does the check. The former
3519 is then used to implement four new variables: $spool_space, $log_space,
3520 $spool_inodes, and $log_inodes.
3522 32. The RFC2047 encoding function was originally intended for short strings
3523 such as real names; it was not keeping to the 75-character limit for
3524 encoded words that the RFC imposes. It now respects the limit, and
3525 generates multiple encoded words if necessary. To be on the safe side, I
3526 have increased the buffer size for the ${rfc2047: expansion operator from
3529 33. It is now permitted to omit both strings after an "if" condition; if the
3530 condition is true, the result is "true". As before, when the second string
3531 is omitted, a false condition yields an empty string. This makes it less
3532 cumbersome to write custom ACL and router conditions.
3534 34. Failure to deliver a bounce message always caused it to be frozen, even if
3535 there was an errors_to setting on the router. The errors_to setting is now
3538 35. If an IPv6 address is given for -bh or -bhc, it is now converted to the
3539 canonical form (fully expanded) before being placed in
3540 $sender_host_address.
3542 36. The table in the code that translates DNS record types into text (T_A to
3543 "A" for instance) was missing entries for NS and CNAME. It is just possible
3544 that this could have caused confusion if both these types were looked up
3545 for the same domain, because the text type is used as part of Exim's
3546 per-process caching. But the chance of anyone hitting this buglet seems
3549 37. The dnsdb lookup has been extended in a number of ways.
3551 (1) There is a new type, "zns", which walks up the domain tree until it
3552 finds some nameserver records. It should be used with care.
3554 (2) There is a new type, "mxh", which is like "mx" except that it returns
3555 just the host names, not the priorities.
3557 (3) It is now possible to give a list of domains (or IP addresses) to be
3558 looked up. The behaviour when one of the lookups defers can be
3559 controlled by a keyword.
3561 (4) It is now possible to specify the separator character for use when
3562 multiple records are returned.
3564 38. The dnslists ACL condition has been extended: it is now possible to supply
3565 a list of IP addresses and/or domains to be looked up in a particular DNS
3568 39. Added log_selector=+queue_time_overall.
3570 40. When running the queue in the test harness, wait just a tad after forking a
3571 delivery process, to get repeatability of debugging output.
3573 41. Include certificate and key file names in error message when GnuTLS fails
3574 to set them up, because the GnuTLS error message doesn't include the name
3575 of the failing file when there is a problem reading it.
3577 42. Allow both -bf and -bF in the same test run.
3579 43. Did the same fix as 41 above for OpenSSL, which had the same infelicity.
3581 44. The "Exiscan patch" is now merged into the mainline Exim source.
3583 45. Sometimes the final signoff response after QUIT could fail to get
3584 transmitted in the non-TLS case. Testing !tls_active instead of tls_active
3585 < 0 before doing a fflush(). This bug looks as though it goes back to the
3586 introduction of TLS in release 3.20, but "sometimes" must have been rare
3587 because the tests only now provoked it.
3589 46. Reset the locale to "C" after calling embedded Perl, in case it was changed
3590 (this can affect the format of dates).
3592 47. exim_tidydb, when checking for the continued existence of a message for
3593 which it has found a message-specific retry record, was not finding
3594 messages that were in split spool directories. Consequently, it was
3595 deleting retry records that should have stayed in existence.
3597 48. Steve fixed some bugs in eximstats.
3599 49. The SPA authentication driver was not abandoning authentication and moving
3600 on to the next authenticator when an expansion was forced to fail,
3601 contradicting the general specification for all authenticators. Instead it
3602 was generating a temporary error. It now behaves as specified.
3604 50. The default ordering of permitted cipher suites for GnuTLS was pessimal
3605 (the order specifies the preference for clients). The order is now AES256,
3606 AES128, 3DES, ARCFOUR128.
3608 51. Small patch to Sieve code - explicitly set From: when generating an
3611 52. Exim crashed if a remote delivery caused a very long error message to be
3612 recorded - for instance if somebody sent an entire SpamAssassin report back
3613 as a large number of 550 error lines. This bug was coincidentally fixed by
3614 increasing the size of one of Exim's internal buffers (big_buffer) that
3615 happened as part of the Exiscan merge. However, to be on the safe side, I
3616 have made the code more robust (and fixed the comments that describe what
3619 53. Now that there can be additional text after "Completed" in log lines (if
3620 the queue_time_overall log selector is set), a one-byte patch to exigrep
3621 was needed to allow it to recognize "Completed" as not the last thing in
3624 54. The LDAP lookup was not handling a return of LDAP_RES_SEARCH_REFERENCE. A
3625 patch that reportedly fixes this has been added. I am not expert enough to
3626 create a test for it. This is what the patch creator wrote:
3628 "I found a little strange behaviour of ldap code when working with
3629 Windows 2003 AD Domain, where users was placed in more than one
3630 Organization Units. When I tried to give exim partial DN, the exit code
3631 of ldap_search was unknown to exim because of LDAP_RES_SEARCH_REFERENCE.
3632 But simultaneously result of request was absolutely normal ldap result,
3633 so I produce this patch..."
3635 Later: it seems that not all versions of LDAP support LDAP_RES_SEARCH_
3636 REFERENCE, so I have modified the code to exclude the patch when that macro
3639 55. Some experimental protocols are using DNS PTR records for new purposes. The
3640 keys for these records are domain names, not reversed IP addresses. The
3641 dnsdb PTR lookup now tests whether its key is an IP address. If not, it
3642 leaves it alone. Component reversal etc. now happens only for IP addresses.
3645 56. Improve error message when ldap_search() fails in OpenLDAP or Solaris LDAP.
3647 57. Double the size of the debug message buffer (to 2048) so that more of very
3648 long debug lines gets shown.
3650 58. The exicyclog utility now does better if the number of log files to keep
3651 exceeds 99. In this case, it numbers them 001, 002 ... instead of 01, 02...
3653 59. Two changes related to the smtp_active_hostname option:
3655 (1) $smtp_active_hostname is now available as a variable.
3656 (2) The default for smtp_banner uses $smtp_active_hostname instead
3657 of $primary_hostname.
3659 60. The host_aton() function is supposed to be passed a string that is known
3660 to be a valid IP address. However, in the case of IPv6 addresses, it was
3661 not checking this. This is a hostage to fortune. Exim now panics and dies
3662 if the condition is not met. A case was found where this could be provoked
3663 from a dnsdb PTR lookup with an IPv6 address that had more than 8
3664 components; fortuitously, this particular loophole had already been fixed
3665 by change 4.50/55 above.
3667 If there are any other similar loopholes, the new check in host_aton()
3668 itself should stop them being exploited. The report I received stated that
3669 data on the command line could provoke the exploit when Exim was running as
3670 exim, but did not say which command line option was involved. All I could
3671 find was the use of -be with a bad dnsdb PTR lookup, and in that case it is
3672 running as the user.
3675 61. There was a buffer overflow vulnerability in the SPA authentication code
3676 (which came originally from the Samba project). I have added a test to the
3677 spa_base64_to_bits() function which I hope fixes it.
3680 62. Configuration update for GNU/Hurd and variations. Updated Makefile-GNU and
3681 os.h-GNU, and added configuration files for GNUkFreeBSD and GNUkNetBSD.
3683 63. The daemon start-up calls getloadavg() while still root for those OS that
3684 need the first call to be done as root, but it missed one case: when
3685 deliver_queue_load_max is set with deliver_drop_privilege. This is
3686 necessary for the benefit of the queue runner, because there is no re-exec
3687 when deliver_drop_privilege is set.
3689 64. A call to exiwhat cut short delays set up by "delay" modifiers in ACLs.
3690 This has been fixed.
3692 65. Caching of lookup data for "hosts =" ACL conditions, when a named host list
3693 was in use, was not putting the data itself into the right store pool;
3694 consequently, it could be overwritten for a subsequent message in the same
3695 SMTP connection. (Fix 4.40/11 dealt with the non-cache case, but overlooked
3698 66. Added hosts_max_try_hardlimit to the smtp transport, default 50.
3700 67. The string_is_ip_address() function returns 0, 4, or 6, for "no an IP
3701 address", "IPv4 address", and "IPv6 address", respectively. Some calls of
3702 the function were treating the return as a boolean value, which happened to
3703 work because 0=false and not-0=true, but is not correct code.
3705 68. The host_aton() function was not handling scoped IPv6 addresses (those
3706 with, for example, "%eth0" on the end) correctly.
3708 69. Fixed some compiler warnings in acl.c for the bitmaps specified with
3709 negated items (that is, ~something) in unsigned ints. Some compilers
3710 apparently mutter when there is no cast.
3712 70. If an address verification called from an ACL failed, and did not produce a
3713 user-specific message (i.e. there was only a "system" message), nothing was
3714 put in $acl_verify_message. In this situation, it now puts the system
3717 71. Change 4.23/11 added synchronization checking at the start of an SMTP
3718 session; change 4.31/43 added the unwanted input to the log line - except
3719 that it did not do this in the start of session case. It now does.
3721 72. After a timeout in a callout SMTP session, Exim still sent a QUIT command.
3722 This is wrong and can cause the other end to generate a synchronization
3723 error if it is another Exim or anything else that does the synchronization
3724 check. A QUIT command is no longer sent after a timeout.
3726 73. $host_lookup_deferred has been added, to make it easier to detect DEFERs
3727 during host lookups.
3729 74. The defer_ok option of callout verification was not working if it was used
3730 when verifying addresses in header lines, that is, for this case:
3732 verify = header_sender/callout=defer_ok
3734 75. A backgrounded daemon closed stdin/stdout/stderr on entry; this meant that
3735 those file descriptors could be used for SMTP connections. If anything
3736 wrote to stderr (the example that came up was "warn" in embedded Perl), it
3737 could be sent to the SMTP client, causing chaos. The daemon now opens
3738 stdin, stdout, and stderr to /dev/null when it puts itself into the
3741 76. Arrange for output from Perl's "warn" command to be written to Exim's main
3742 log by default. The user can override this with suitable Perl magic.
3744 77. The use of log_message on a "discard" ACL verb, which is supposed to add to
3745 the log message when discard triggers, was not working for the DATA ACL or
3746 for the non-SMTP ACL.
3748 78. Error message wording change in sieve.c.
3750 79. If smtp_accept_max_per_host was set, the number of connections could be
3751 restricted to fewer than expected, because the daemon was trying to set up
3752 a new connection before checking whether the processes handling previous
3753 connections had finished. The check for completed processes is now done
3754 earlier. On busy systems, this bug wouldn't be noticed because something
3755 else would have woken the daemon, and it would have reaped the completed
3758 80. If a message was submitted locally by a user whose login name contained one
3759 or more spaces (ugh!), the spool file that Exim wrote was not re-readable.
3760 It caused a spool format error. I have fixed the spool reading code. A
3761 related problem was that the "from" clause in the Received: line became
3762 illegal because of the space(s). It is now covered by ${quote_local_part.
3764 81. Included the latest eximstats from Steve (adds average sizes to HTML Top
3767 82. Updated OS/Makefile-AIX as per message from Mike Meredith.
3769 83. Patch from Sieve maintainer to fix unterminated string problem in
3770 "vacation" handling.
3772 84. Some minor changes to the Linux configuration files to help with other
3773 OS variants using glibc.
3775 85. One more patch for Sieve to update vacation handling to latest spec.
3778 ----------------------------------------------------
3779 See the note above about the 4.44 and 4.50 releases.
3780 ----------------------------------------------------
3786 1. Change 4.43/35 introduced a bug that caused file counts to be
3787 incorrectly computed when quota_filecount was set in an appendfile
3790 2. Closing a stable door: arrange to panic-die if setitimer() ever fails. The
3791 bug fixed in 4.43/37 would have been diagnosed quickly if this had been in
3794 3. Give more explanation in the error message when the command for a transport
3795 filter fails to execute.
3797 4. There are several places where Exim runs a non-Exim command in a
3798 subprocess. The SIGUSR1 signal should be disabled for these processes. This
3799 was being done only for the command run by the queryprogram router. It is
3800 now done for all such subprocesses. The other cases are: ${run, transport
3801 filters, and the commands run by the lmtp and pipe transports.
3803 5. Some older OS have a limit of 256 on the maximum number of file
3804 descriptors. Exim was using setrlimit() to set 1000 as a large value
3805 unlikely to be exceeded. Change 4.43/17 caused a lot of logging on these
3806 systems. I've change it so that if it can't get 1000, it tries for 256.
3808 6. "control=submission" was allowed, but had no effect, in a DATA ACL. This
3809 was an oversight, and furthermore, ever since the addition of extra
3810 controls (e.g. 4.43/32), the checks on when to allow different forms of
3811 "control" were broken. There should now be diagnostics for all cases when a
3812 control that does not make sense is encountered.
3814 7. $recipients is now available in the predata ACL (oversight).
3816 8. Tidy the search cache before the fork to do a delivery from a message
3817 received from the command line. Otherwise the child will trigger a lookup
3818 failure and thereby defer the delivery if it tries to use (for example) a
3819 cached ldap connection that the parent has called unbind on.
3821 9. If verify=recipient was followed by verify=sender in a RCPT ACL, the value
3822 of $address_data from the recipient verification was clobbered by the
3823 sender verification.
3825 10. If FIXED_NEVER_USERS was defined, but empty, Exim was assuming the uid 0
3826 was its contents. (It was OK if the option was not defined at all.)
3828 11. A "Completed" log line is now written for messages that are removed from
3829 the spool by the -Mrm option.
3831 12. $host_address is now set to the target address during the checking of
3832 ignore_target_hosts.
3834 13. When checking ignore_target_hosts for an ipliteral router, no host name was
3835 being passed; this would have caused $sender_host_name to have been used if
3836 matching the list had actually called for a host name (not very likely,
3837 since this list is usually IP addresses). A host name is now passed as
3840 14. Changed the calls that set up the SIGCHLD handler in the daemon to use the
3841 code that specifies a non-restarting handler (typically sigaction() in
3842 modern systems) in an attempt to fix a rare and obscure crash bug.
3844 15. Narrowed the window for a race in the daemon that could cause it to ignore
3845 SIGCHLD signals. This is not a major problem, because they are used only to
3846 wake it up if nothing else does.
3848 16. A malformed maildirsize file could cause Exim to calculate negative values
3849 for the mailbox size or file count. Odd effects could occur as a result.
3850 The maildirsize information is now recalculated if the size or filecount
3853 17. Added HAVE_SYS_STATVFS_H to the os.h file for Linux, as it has had this
3854 support for a long time. Removed HAVE_SYS_VFS_H.
3856 18. Updated exipick to current release from John Jetmore.
3858 19. Allow an empty sender to be matched against a lookup in an address list.
3859 Previously the only cases considered were a regular expression, or an
3862 20. Exim went into a mad DNS lookup loop when doing a callout where the
3863 host was specified on the transport, if the DNS lookup yielded more than
3866 21. The RFC2047 encoding function was originally intended for short strings
3867 such as real names; it was not keeping to the 75-character limit for
3868 encoded words that the RFC imposes. It now respects the limit, and
3869 generates multiple encoded words if necessary. To be on the safe side, I
3870 have increased the buffer size for the ${rfc2047: expansion operator from
3873 22. Failure to deliver a bounce message always caused it to be frozen, even if
3874 there was an errors_to setting on the router. The errors_to setting is now
3877 23. If an IPv6 address is given for -bh or -bhc, it is now converted to the
3878 canonical form (fully expanded) before being placed in
3879 $sender_host_address.
3881 24. Updated eximstats to version 1.33
3883 25. Include certificate and key file names in error message when GnuTLS fails
3884 to set them up, because the GnuTLS error message doesn't include the name
3885 of the failing file when there is a problem reading it.
3887 26. Expand error message when OpenSSL has problems setting up cert/key files.
3890 27. Reset the locale to "C" after calling embedded Perl, in case it was changed
3891 (this can affect the format of dates).
3893 28. exim_tidydb, when checking for the continued existence of a message for
3894 which it has found a message-specific retry record, was not finding
3895 messages that were in split spool directories. Consequently, it was
3896 deleting retry records that should have stayed in existence.
3898 29. eximstats updated to version 1.35
3899 1.34 - allow eximstats to parse syslog lines as well as mainlog lines
3900 1.35 - bugfix such that pie charts by volume are generated correctly
3902 30. The SPA authentication driver was not abandoning authentication and moving
3903 on to the next authenticator when an expansion was forced to fail,
3904 contradicting the general specification for all authenticators. Instead it
3905 was generating a temporary error. It now behaves as specified.
3907 31. The default ordering of permitted cipher suites for GnuTLS was pessimal
3908 (the order specifies the preference for clients). The order is now AES256,
3909 AES128, 3DES, ARCFOUR128.
3911 31. Small patch to Sieve code - explicitly set From: when generating an
3914 32. Exim crashed if a remote delivery caused a very long error message to be
3915 recorded - for instance if somebody sent an entire SpamAssassin report back
3916 as a large number of 550 error lines. This bug was coincidentally fixed by
3917 increasing the size of one of Exim's internal buffers (big_buffer) that
3918 happened as part of the Exiscan merge. However, to be on the safe side, I
3919 have made the code more robust (and fixed the comments that describe what
3922 33. Some experimental protocols are using DNS PTR records for new purposes. The
3923 keys for these records are domain names, not reversed IP addresses. The
3924 dnsdb PTR lookup now tests whether its key is an IP address. If not, it
3925 leaves it alone. Component reversal etc. now happens only for IP addresses.
3928 34. The host_aton() function is supposed to be passed a string that is known
3929 to be a valid IP address. However, in the case of IPv6 addresses, it was
3930 not checking this. This is a hostage to fortune. Exim now panics and dies
3931 if the condition is not met. A case was found where this could be provoked
3932 from a dnsdb PTR lookup with an IPv6 address that had more than 8
3933 components; fortuitously, this particular loophole had already been fixed
3934 by change 4.50/55 or 4.44/33 above.
3936 If there are any other similar loopholes, the new check in host_aton()
3937 itself should stop them being exploited. The report I received stated that
3938 data on the command line could provoke the exploit when Exim was running as
3939 exim, but did not say which command line option was involved. All I could
3940 find was the use of -be with a bad dnsdb PTR lookup, and in that case it is
3941 running as the user.
3944 35. There was a buffer overflow vulnerability in the SPA authentication code
3945 (which came originally from the Samba project). I have added a test to the
3946 spa_base64_to_bits() function which I hope fixes it.
3949 36. The daemon start-up calls getloadavg() while still root for those OS that
3950 need the first call to be done as root, but it missed one case: when
3951 deliver_queue_load_max is set with deliver_drop_privilege. This is
3952 necessary for the benefit of the queue runner, because there is no re-exec
3953 when deliver_drop_privilege is set.
3955 37. Caching of lookup data for "hosts =" ACL conditions, when a named host list
3956 was in use, was not putting the data itself into the right store pool;
3957 consequently, it could be overwritten for a subsequent message in the same
3958 SMTP connection. (Fix 4.40/11 dealt with the non-cache case, but overlooked
3961 38. Sometimes the final signoff response after QUIT could fail to get
3962 transmitted in the non-TLS case. Testing !tls_active instead of tls_active
3963 < 0 before doing a fflush(). This bug looks as though it goes back to the
3964 introduction of TLS in release 3.20, but "sometimes" must have been rare
3965 because the tests only now provoked it.
3971 1. Fixed a longstanding but relatively impotent bug: a long time ago, before
3972 PIPELINING, the function smtp_write_command() used to return TRUE or FALSE.
3973 Now it returns an integer. A number of calls were still expecting a T/F
3974 return. Fortuitously, in all cases, the tests worked in OK situations,
3975 which is the norm. However, things would have gone wrong on any write
3976 failures on the smtp file descriptor. This function is used when sending
3977 messages over SMTP and also when doing verify callouts.
3979 2. When Exim is called to do synchronous delivery of a locally submitted
3980 message (the -odf or -odi options), it no longer closes stderr before doing
3983 3. Implemented the mua_wrapper option.
3985 4. Implemented mx_fail_domains and srv_fail_domains for the dnslookup router.
3987 5. Implemented the functions header_remove(), header_testname(),
3988 header_add_at_position(), and receive_remove_recipient(), and exported them
3991 6. If an ACL "warn" statement specified the addition of headers, Exim already
3992 inserted X-ACL-Warn: at the start if there was no header name. However, it
3993 was not making this test for the second and subsequent header lines if
3994 there were newlines in the string. This meant that an invalid header could
3995 be inserted if Exim was badly configured.
3997 7. Allow an ACL "warn" statement to add header lines at the start or after all
3998 the Received: headers, as well as at the end.
4000 8. Added the rcpt_4xx retry error code.
4002 9. Added postmaster_mailfrom=xxx to callout verification option.
4004 10. Added mailfrom=xxxx to the callout verification option, for verify=
4007 11. ${substr_1_:xxxx} and ${substr__3:xxxx} are now diagnosed as syntax errors
4008 (they previously behaved as ${substr_1_0:xxxx} and ${substr:_0_3:xxxx}).
4010 12. Inserted some casts to stop certain compilers warning when using pointer
4011 differences as field lengths or precisions in printf-type calls (mostly
4012 affecting debugging statements).
4014 13. Added optional readline() support for -be (dynamically loaded).
4016 14. Obscure bug fix: if a message error (e.g. 4xx to MAIL) happened within the
4017 same clock tick as a message's arrival, so that its received time was the
4018 same as the "first fail" time on the retry record, and that message
4019 remained on the queue past the ultimate address timeout, every queue runner
4020 would try a delivery (because it was past the ultimate address timeout) but
4021 after another failure, the ultimate address timeout, which should have then
4022 bounced the address, did not kick in. This was a "< instead of <=" error;
4023 in most cases the first failure would have been in the next clock tick
4024 after the received time, and all would be well.
4026 15. The special items beginning with @ in domain lists (e.g. @mx_any) were not
4027 being recognized when the domain list was tested by the match_domain
4028 condition in an expansion string.
4030 16. Added the ${str2b64: operator.
4032 17. Exim was always calling setrlimit() to set a large limit for the number of
4033 processes, without checking whether the existing limit was already
4034 adequate. (It did check for the limit on file descriptors.) Furthermore,
4035 errors from getrlimit() and setrlimit() were being ignored. Now they are
4036 logged to the main and panic logs, but Exim does carry on, to try to do its
4037 job under whatever limits there are.
4039 18. Imported PCRE 5.0.
4041 19. Trivial typo in log message " temporarily refused connection" (the leading
4044 20. If the log selector return_path_on_delivery was set and an address was
4045 redirected to /dev/null, the delivery process crashed because it assumed
4046 that a return path would always be set for a "successful" delivery. In this
4047 case, the whole delivery is bypassed as an optimization, and therefore no
4050 21. Internal re-arrangement: the function for sending a challenge and reading
4051 a response while authentication was assuming a zero-terminated challenge
4052 string. It's now changed to take a pointer and a length, to allow for
4053 binary data in such strings.
4055 22. Added the cyrus_sasl authenticator (code supplied by MBM).
4057 23. Exim was not respecting finduser_retries when seeking the login of the
4058 uid under which it was called; it was always trying 10 times. (The default
4059 setting of finduser_retries is zero.) Also, it was sleeping after the final
4060 failure, which is pointless.
4062 24. Implemented tls_on_connect_ports.
4064 25. Implemented acl_smtp_predata.
4066 26. If the domain in control=submission is set empty, Exim assumes that the
4067 authenticated id is a complete email address when it generates From: or
4068 Sender: header lines.
4070 27. Added "#define SOCKLEN_T int" to OS/os.h-SCO and OS/os.h-SCO_SV. Also added
4071 definitions to OS/Makefile-SCO and OS/Makefile-SCO_SV that put basename,
4072 chown and chgrp in /bin and hostname in /usr/bin.
4074 28. Exim was keeping the "process log" file open after each use, just as it
4075 does for the main log. This opens the possibility of it remaining open for
4076 long periods when the USR1 signal hits a daemon. Occasional processlog
4077 errors were reported, that could have been caused by this. Anyway, it seems
4078 much more sensible not to leave this file open at all, so that is what now
4081 29. The long-running daemon process does not normally write to the log once it
4082 has entered its main loop, and it closes the log before doing so. This is
4083 so that log files can straightforwardly be renamed and moved. However,
4084 there are a couple of unusual error situations where the daemon does write
4085 log entries, and I had neglected to close the log afterwards.
4087 30. The text of an SMTP error response that was received during a remote
4088 delivery was being truncated at 512 bytes. This is too short for some of
4089 the long messages that one sometimes sees. I've increased the limit to
4092 31. It is now possible to make retry rules that apply only when a message has a
4093 specific sender, in particular, an empty sender.
4095 32. Added "control = enforce_sync" and "control = no_enforce_sync". This makes
4096 it possible to be selective about when SMTP synchronization is enforced.
4098 33. Added "control = caseful_local_part" and "control = "caselower_local_part".
4100 32. Implemented hosts_connection_nolog.
4102 33. Added an ACL for QUIT.
4104 34. Setting "delay_warning=" to disable warnings was not working; it gave a
4107 35. Added mailbox_size and mailbox_filecount to appendfile.
4109 36. Added control = no_multiline_responses to ACLs.
4111 37. There was a bug in the logic of the code that waits for the clock to tick
4112 in the case where the clock went backwards by a substantial amount such
4113 that the microsecond fraction of "now" was more than the microsecond
4114 fraction of "then" (but the whole seconds number was less).
4116 38. Added support for the libradius Radius client library this is found on
4117 FreeBSD (previously only the radiusclient library was supported).
4123 1. When certain lookups returned multiple values in the form name=value, the
4124 quoting of the values was not always being done properly. Specifically:
4125 (a) If the value started with a double quote, but contained no whitespace,
4127 (b) If the value contained whitespace other than a space character (i.e.
4128 tabs or newlines or carriage returns) it was not quoted.
4129 This fix has been applied to the mysql and pgsql lookups by writing a
4130 separate quoting function and calling it from the lookup code. The fix
4131 should probably also be applied to nisplus, ibase and oracle lookups, but
4132 since I cannot test any of those, I have not disturbed their existing code.
4134 2. A hit in the callout cache for a specific address caused a log line with no
4135 reason for rejecting RCPT. Now it says "Previous (cached) callout
4136 verification failure".
4138 3. There was an off-by-one bug in the queryprogram router. An over-long
4139 return line was truncated at 256 instead of 255 characters, thereby
4140 overflowing its buffer with the terminating zero. As well as fixing this, I
4141 have increased the buffer size to 1024 (and made a note to document this).
4143 4. If an interrupt, such as the USR1 signal that is send by exiwhat, arrives
4144 when Exim is waiting for an SMTP response from a remote server, Exim
4145 restarts its select() call on the socket, thereby resetting its timeout.
4146 This is not a problem when such interrupts are rare. Somebody set up a cron
4147 job to run exiwhat every 2 minutes, which is less than the normal select()
4148 timeout (5 or 10 minutes). This meant that the select() timeout never
4149 kicked in because it was always reset. I have fixed this by comparing the
4150 time when an interrupt arrives with the time at the start of the first call
4151 to select(). If more time than the timeout has elapsed, the interrupt is
4152 treated as a timeout.
4154 5. Some internal re-factoring in preparation for the addition of Sieve
4155 extensions (by MH). In particular, the "personal" test is moved to a
4156 separate function, and given an option for scanning Cc: and Bcc: (which is
4157 not set for Exim filters).
4159 6. When Exim created an email address using the login of the caller as the
4160 local part (e.g. when creating a From: or Sender: header line), it was not
4161 quoting the local part when it contained special characters such as @.
4163 7. Installed new OpenBSD configuration files.
4165 8. Reworded some messages for syntax errors in "and" and "or" conditions to
4166 try to make them clearer.
4168 9. Callout options, other than the timeout value, were being ignored when
4169 verifying sender addresses in header lines. For example, when using
4171 verify = header_sender/callout=no_cache
4173 the cache was (incorrectly) being used.
4175 10. Added a missing instance of ${EXE} to the exim_install script; this affects
4176 only the Cygwin environment.
4178 11. When return_path_on_delivery was set as a log selector, if different remote
4179 addresses in the same message used different return paths and parallel
4180 remote delivery occurred, the wrong values would sometimes be logged.
4181 (Whenever a remote delivery process finished, the return path value from
4182 the most recently started remote delivery process was logged.)
4184 12. RFC 3848 specifies standard names for the "with" phrase in Received: header
4185 lines when AUTH and/or TLS are in use. This is the "received protocol"
4186 field. Exim used to use "asmtp" for authenticated SMTP, without any
4187 indication (in the protocol name) for TLS use. Now it follows the RFC and
4188 uses "esmtpa" if the connection is authenticated, "esmtps" if it is
4189 encrypted, and "esmtpsa" if it is both encrypted and authenticated. These
4190 names appear in log lines as well as in Received: header lines.
4192 13. Installed MH's patches for Sieve to add the "copy" and "vacation"
4193 extensions, and comparison tests, and to fix some bugs.
4195 14. Changes to the "personal" filter test:
4197 (1) The test was buggy in that it was just doing the equivalent of
4198 "contains" tests on header lines. For example, if a user's address was
4199 anne@some.where, the "personal" test would incorrectly be true for
4201 To: susanne@some.where
4203 This test is now done by extracting each address from the header in turn,
4204 and checking the entire address. Other tests that are part of "personal"
4205 are now done using regular expressions (for example, to check local parts
4206 of addresses in From: header lines).
4208 (2) The list of non-personal local parts in From: addresses has been
4209 extended to include "listserv", "majordomo", "*-request", and "owner-*",
4210 taken from the Sieve specification recommendations.
4212 (3) If the message contains any header line starting with "List-" it is
4213 treated as non-personal.
4215 (4) The test for "circular" in the Subject: header line has been removed
4216 because it now seems ill-conceived.
4218 15. Minor typos in src/EDITME comments corrected.
4220 16. Installed latest exipick from John Jetmore.
4222 17. If headers_add on a router specified a text string that was too long for
4223 string_sprintf() - that is, longer than 8192 bytes - Exim panicked. The use
4224 of string_sprintf() is now avoided.
4226 18. $message_body_size was not set (it was always zero) when running the DATA
4227 ACL and the local_scan() function.
4229 19. For the "mail" command in an Exim filter, no default was being set for
4230 the once_repeat time, causing a random time value to be used if "once" was
4231 specified. (If the value happened to be <= 0, no repeat happened.) The
4232 default is now 0s, meaning "never repeat". The "vacation" command was OK
4233 (its default is 7d). It's somewhat surprising nobody ever noticed this bug
4234 (I found it when inspecting the code).
4236 20. There is now an overall timeout for performing a callout verification. It
4237 defaults to 4 times the callout timeout, which applies to individual SMTP
4238 commands during the callout. The overall timeout applies when there is more
4239 than one host that can be tried. The timeout is checked before trying the
4240 next host. This prevents very long delays if there are a large number of
4241 hosts and all are timing out (e.g. when the network connections are timing
4242 out). The value of the overall timeout can be changed by specifying an
4243 additional sub-option for "callout", called "maxwait". For example:
4245 verify = sender/callout=5s,maxwait=20s
4247 21. Add O_APPEND to the open() call for maildirsize files (Exim already seeks
4248 to the end before writing, but this should make it even safer).
4250 22. Exim was forgetting that it had advertised PIPELINING for the second and
4251 subsequent messages on an SMTP connection. It was also not resetting its
4252 memory on STARTTLS and an internal HELO.
4254 23. When Exim logs an SMTP synchronization error within a session, it now
4255 records whether PIPELINING has been advertised or not.
4257 24. Added 3 instances of "(long int)" casts to time_t variables that were being
4258 formatted using %ld, because on OpenBSD (and perhaps others), time_t is int
4259 rather than long int.
4261 25. Installed the latest Cygwin configuration files from the Cygwin maintainer.
4263 26. Added the never_mail option to autoreply.
4269 1. A reorganization of the code in order to implement 4.40/8 caused a daemon
4270 crash if the getsockname() call failed; this can happen if a connection is
4271 closed very soon after it is established. The problem was simply in the
4272 order in which certain operations were done, causing Exim to try to write
4273 to the SMTP stream before it had set up the file descriptor. The bug has
4274 been fixed by making things happen in the correct order.
4280 1. If "drop" was used in a DATA ACL, the SMTP output buffer was not flushed
4281 before the connection was closed, thus losing the rejection response.
4283 2. Commented out the definition of SOCKLEN_T in os.h-SunOS5. It is needed for
4284 some early Solaris releases, but causes trouble in current releases where
4285 socklen_t is defined.
4287 3. When std{in,out,err} are closed, re-open them to /dev/null so that they
4290 4. Minor refactoring of os.c-Linux to avoid compiler warning when IPv6 is not
4293 5. Refactoring in expand.c to improve memory usage. Pre-allocate a block so
4294 that releasing the top of it at the end releases what was used for sub-
4295 expansions (unless the block got too big). However, discard this block if
4296 the first thing is a variable or header, so that we can use its block when
4297 it is dynamic (useful for very large $message_headers, for example).
4299 6. Lookups now cache *every* query, not just the most recent. A new, separate
4300 store pool is used for this. It can be recovered when all lookup caches are
4301 flushed. Lookups now release memory at the end of their result strings.
4302 This has involved some general refactoring of the lookup sources.
4304 7. Some code has been added to the store_xxx() functions to reduce the amount
4305 of flapping under certain conditions.
4307 8. log_incoming_interface used to affect only the <= reception log lines. Now
4308 it causes the local interface and port to be added to several more SMTP log
4309 lines, for example "SMTP connection from", and rejection lines.
4311 9. The Sieve author supplied some patches for the doc/README.SIEVE file.
4313 10. Added a conditional definition of _BSD_SOCKLEN_T to os.h-Darwin.
4315 11. If $host_data was set by virtue of a hosts lookup in an ACL, its value
4316 could be overwritten at the end of the current message (or the start of a
4317 new message if it was set in a HELO ACL). The value is now preserved for
4318 the duration of the SMTP connection.
4320 12. If a transport had a headers_rewrite setting, and a matching header line
4321 contained an unqualified address, that address was qualified, even if it
4322 did not match any rewriting rules. The underlying bug was that the values
4323 of the flags that permit the existence of unqualified sender and recipient
4324 addresses in header lines (set by {sender,recipient}_unqualified_hosts for
4325 non-local messages, and by -bnq for local messages) were not being
4326 preserved with the message after it was received.
4328 13. When Exim was logging an SMTP synchronization error, it could sometimes log
4329 "next input=" as part of the text comprising the host identity instead of
4330 the correct text. The code was using the same buffer for two different
4331 strings. However, depending on which order the printing function evaluated
4332 its arguments, the bug did not always show up. Under Linux, for example, my
4333 test suite worked just fine.
4335 14. Exigrep contained a use of Perl's "our" scoping after change 4.31/70. This
4336 doesn't work with some older versions of Perl. It has been changed to "my",
4337 which in any case is probably the better facility to use.
4339 15. A really picky compiler found some instances of statements for creating
4340 error messages that either had too many or two few arguments for the format
4343 16. The size of the buffer for calls to the DNS resolver has been increased
4344 from 1024 to 2048. A larger buffer is needed when performing PTR lookups
4345 for addresses that have a lot of PTR records. This alleviates a problem; it
4346 does not fully solve it.
4348 17. A dnsdb lookup for PTR records that receives more data than will fit in the
4349 buffer now truncates the list and logs the incident, which is the same
4350 action as happens when Exim is looking up a host name and its aliases.
4351 Previously in this situation something unpredictable would happen;
4352 sometimes it was "internal error: store_reset failed".
4354 18. If a server dropped the connection unexpectedly when an Exim client was
4355 using GnuTLS and trying to read a response, the client delivery process
4356 crashed while trying to generate an error log message.
4358 19. If a "warn" verb in an ACL added multiple headers to a message in a single
4359 string, for example:
4361 warn message = H1: something\nH2: something
4363 the text was added as a single header line from Exim's point of view
4364 though it ended up OK in the delivered message. However, searching for the
4365 second and subsequent header lines using $h_h2: did not work. This has been
4366 fixed. Similarly, if a system filter added multiple headers in this way,
4367 the routers could not see them.
4369 20. Expanded the error message when iplsearch is called with an invalid key to
4370 suggest using net-iplsearch in a host list.
4372 21. When running tests using -bh, any delays imposed by "delay" modifiers in
4373 ACLs are no longer actually imposed (and a message to that effect is
4376 22. If a "gecos" field in a passwd entry contained escaped characters, in
4377 particular, if it contained a \" sequence, Exim got it wrong when building
4378 a From: or a Sender: header from that name. A second bug also caused
4379 incorrect handling when an unquoted " was present following a character
4380 that needed quoting.
4382 23. "{crypt}" as a password encryption mechanism for a "crypteq" expansion item
4383 was not being matched caselessly.
4385 24. Arranged for all hyphens in the exim.8 source to be escaped with
4388 25. Change 16 of 4.32, which reversed 71 or 4.31 didn't quite do the job
4389 properly. Recipient callout cache records were still being keyed to include
4390 the sender, even when use_sender was set false. This led to far more
4391 callouts that were necessary. The sender is no longer included in the key
4392 when use_sender is false.
4394 26. Added "control = submission" modifier to ACLs.
4396 27. Added the ${base62d: operator to decode base 62 numbers.
4398 28. dnsdb lookups can now access SRV records.
4400 29. CONFIGURE_OWNER can be set at build time to define an alternative owner for
4401 the configuration file.
4403 30. The debug message "delivering xxxxxx-xxxxxx-xx" is now output in verbose
4404 (-v) mode. This makes the output for a verbose queue run more intelligible.
4406 31. Added a use_postmaster feature to recipient callouts.
4408 32. Added the $body_zerocount variable, containing the number of binary zero
4409 bytes in the message body.
4411 33. The time of last modification of the "new" subdirectory is now used as the
4412 "mailbox time last read" when there is a quota error for a maildir
4415 34. Added string comparison operators lt, lti, le, lei, gt, gti, ge, gei.
4417 35. Added +ignore_unknown as a special item in host lists.
4419 36. Code for decoding IPv6 addresses in host lists is now included, even if
4420 IPv6 support is not being compiled. This fixes a bug in which an IPv6
4421 address was recognized as an IP address, but was then not correctly decoded
4422 into binary, causing unexpected and incorrect effects when compared with
4429 1. Very minor rewording of debugging text in manualroute to say "list of
4430 hosts" instead of "hostlist".
4432 2. If verify=header_syntax was set, and a header line with an unqualified
4433 address (no domain) and a large number of spaces between the end of the
4434 name and the colon was received, the reception process suffered a buffer
4435 overflow, and (when I tested it) crashed. This was caused by some obsolete
4436 code that should have been removed. The fix is to remove it!
4438 3. When running in the test harness, delay a bit after writing a bounce
4439 message to get a bit more predictability in the log output.
4441 4. Added a call to search_tidyup() just before forking a reception process. In
4442 theory, someone could use a lookup in the expansion of smtp_accept_max_
4443 per_host which, without the tidyup, could leave open a database connection.
4445 5. Added the variables $recipient_data and $sender_data which get set from a
4446 lookup success in an ACL "recipients" or "senders" condition, or a router
4447 "senders" option, similar to $domain_data and $local_part_data.
4449 6. Moved the writing of debug_print from before to after the "senders" test
4452 7. Change 4.31/66 (moving the time when the Received: is generated) caused
4453 problems for message scanning, either using a data ACL, or using
4454 local_scan() because the Received: header was not generated till after they
4455 were called (in order to set the time as the time of reception completion).
4456 I have revised the way this works. The header is now generated after the
4457 body is received, but before the ACL or local_scan() are called. After they
4458 are run, the timestamp in the header is updated.
4464 1. Change 4.24/6 introduced a bug because the SIGALRM handler was disabled
4465 before starting a queue runner without re-exec. This happened only when
4466 deliver_drop_privilege was set or when the Exim user was set to root. The
4467 effect of the bug was that timeouts during subsequent deliveries caused
4468 crashes instead of being properly handled. The handler is now left at its
4469 default (and expected) setting.
4471 2. The other case in which a daemon avoids a re-exec is to deliver an incoming
4472 message, again when deliver_drop_privilege is set or Exim is run as root.
4473 The bug described in (1) was not present in this case, but the tidying up
4474 of the other signals was missing. I have made the two cases consistent.
4476 3. The ignore_target_hosts setting on a manualroute router was being ignored
4477 for hosts that were looked up using the /MX notation.
4479 4. Added /ignore=<ip list> feature to @mx_any, @mx_primary, and @mx_secondary
4482 5. Change 4.31/55 was buggy, and broke when there was a rewriting rule that
4483 operated on the sender address. After changing the $sender_address to <>
4484 for the sender address verify, Exim was re-instated it as the original
4485 (before rewriting) address, but remembering that it had rewritten it, so it
4486 wasn't rewriting it again. This bug also had the effect of breaking the
4487 sender address verification caching when the sender address was rewritten.
4489 6. The ignore_target_hosts option was being ignored by the ipliteral router.
4490 This has been changed so that if the ip literal address matches
4491 ignore_target_hosts, the router declines.
4493 7. Added expansion conditions match_domain, match_address, and match_local_
4494 part (NOT match_host).
4496 8. The placeholder for the Received: header didn't have a length field set.
4498 9. Added code to Exim itself and to exim_lock to test for a specific race
4499 condition that could lead to file corruption when using MBX delivery. The
4500 issue is with the lockfile that is created in /tmp. If this file is removed
4501 after a process has opened it but before that process has acquired a lock,
4502 there is the potential for a second process to recreate the file and also
4503 acquire a lock. This could lead to two Exim processes writing to the file
4504 at the same time. The added code performs the same test as UW imapd; it
4505 checks after acquiring the lock that its file descriptor still refers to
4506 the same named file.
4508 10. The buffer for building added header lines was of fixed size, 8192 bytes.
4509 It is now parameterized by HEADER_ADD_BUFFER_SIZE and this can be adjusted
4512 11. Added the smtp_active_hostname option. If used, this will typically be made
4513 to depend on the incoming interface address. Because $interface_address is
4514 not set up until the daemon has forked a reception process, error responses
4515 that can happen earlier (such as "too many connections") no longer contain
4518 12. If an expansion in a condition on a "warn" statement fails because a lookup
4519 defers, the "warn" statement is abandoned, and the next ACL statement is
4520 processed. Previously this caused the whole ACL to be aborted.
4522 13. Added the iplsearch lookup type.
4524 14. Added ident_timeout as a log selector.
4526 15. Added tls_certificate_verified as a log selector.
4528 16. Added a global option tls_require_ciphers (compare the smtp transport
4529 option of the same name). This controls incoming TLS connections.
4531 17. I finally figured out how to make tls_require_ciphers do a similar thing
4532 in GNUtls to what it does in OpenSSL, that is, set up an appropriate list
4533 before starting the TLS session.
4535 18. Tabs are now shown as \t in -bP output.
4537 19. If the log selector return_path_on_delivery was set, Exim crashed when
4538 bouncing a message because it had too many Received: header lines.
4540 20. If two routers both had headers_remove settings, and the first one included
4541 a superfluous trailing colon, the final name in the first list and the
4542 first name in the second list were incorrectly joined into one item (with a
4543 colon in the middle).
4549 1. Added -C and -D options to the exinext utility, mainly to make it easier
4550 to include in the automated testing, but these could be helpful when
4551 multiple configurations are in use.
4553 2. The exinext utility was not formatting the output nicely when there was
4554 an alternate port involved in the retry record key, nor when there was a
4555 message id as well (for retries that were specific to a specific message
4556 and a specific host). It was also confused by IPv6 addresses, because of
4557 the additional colons they contain. I have fixed the IPv4 problem, and
4558 patched it up to do a reasonable job for IPv6.
4560 3. When there is an error after a MAIL, RCPT, or DATA SMTP command during
4561 delivery, the log line now contains "pipelined" if PIPELINING was used.
4563 4. An SMTP transport process used to panic and die if the bind() call to set
4564 an explicit outgoing interface failed. This has been changed; it is now
4565 treated in the same way as a connect() failure.
4567 5. A reference to $sender_host_name in the part of a conditional expansion
4568 that was being skipped was still causing a DNS lookup. This no longer
4571 6. The def: expansion condition was not recognizing references to header lines
4572 that used bh_ and bheader_.
4574 7. Added the _cache feature to named lists.
4576 8. The code for checking quota_filecount in the appendfile transport was
4577 allowing one more file than it should have been.
4579 9. For compatibility with Sendmail, the command line option
4587 and sets the incoming protocol and host name (for trusted callers). The
4588 host name and its colon can be omitted when only the protocol is to be set.
4589 Note the Exim already has two private options, -pd and -ps, that refer to
4590 embedded Perl. It is therefore impossible to set a protocol value of "d" or
4591 "s", but I don't think that's a major issue.
4593 10. A number of refactoring changes to the code, none of which should affect
4596 (a) The number of logging options was getting close to filling up the
4597 32-bit word that was used as a bit map. I have split them into two classes:
4598 those that are passed in the argument to log_write(), and those that are
4599 only ever tested independently outside of that function. These are now in
4600 separate 32-bit words, so there is plenty of room for expansion again.
4601 There is no change in the user interface or the logging behaviour.
4603 (b) When building, for example, log lines, the code previously used a
4604 macro that called string_cat() twice, in order to add two strings. This is
4605 not really sufficiently general. Furthermore, there was one instance where
4606 it was actually wrong because one of the argument was used twice, and in
4607 one call a function was used. (As it happened, calling the function twice
4608 did not affect the overall behaviour.) The macro has been replaced by a
4609 function that can join an arbitrary number of extra strings onto a growing
4612 (c) The code for expansion conditions now uses a table and a binary chop
4613 instead of a serial search (which was left over from when there were very
4614 few conditions). Also, it now recognizes conditions like "pam" even when
4615 the relevant support is not compiled in: a suitably worded error message is
4616 given if an attempt is made to use such a condition.
4618 11. Added ${time_interval:xxxxx}.
4620 12. A bug was causing one of the ddress fields not to be passed back correctly
4621 from remote delivery subprocesses. The field in question was not being
4622 subsequently used, so this caused to problems in practice.
4624 13. Added new log selectors queue_time and deliver_time.
4626 14. Might have fixed a bug in maildirsizefile handling that threw up
4627 "unexpected character" debug warnings, and recalculated the data
4628 unnecessarily. In any case, I expanded the warning message to give more
4631 15. Added the message "Restricted characters in address" to the statements in
4632 the default ACL that block characters like @ and % in local parts.
4634 16. Change 71 for release 4.31 proved to be much less benign that I imagined.
4635 Three changes have been made:
4637 (a) There was a serious bug; a negative response to MAIL caused the whole
4638 recipient domain to be cached as invalid, thereby blocking all messages
4639 to all local parts at the same domain, from all senders. This bug has
4640 been fixed. The domain is no longer cached after a negative response to
4641 MAIL if the sender used is not empty.
4643 (b) The default behaviour of using MAIL FROM:<> for recipient callouts has
4646 (c) A new callout option, "use_sender" has been added for people who want
4647 the modified behaviour.
4653 1. Removed "EXTRALIBS=-lwrap" from OS/Makefile-Unixware7 on the advice of
4656 2. Removed "LIBS = -lresolv" from OS/Makefile-Darwin as it is not needed, and
4657 indeed breaks things for older releases.
4659 3. Added additional logging to the case where there is a problem reading data
4660 from a filter that is running in a subprocess using a pipe, in order to
4661 try to track down a specific problem.
4663 4. Testing facility fudge: when running in the test harness and attempting
4664 to connect to 10.x.x.x (expecting a connection timeout) I'm now sometimes
4665 getting "No route to host". Convert this to a timeout.
4667 5. Define ICONV_ARG2_TYPE as "char **" for Unixware7 to avoid compiler
4670 6. Some OS don't have socklen_t but use size_t instead. This affects the
4671 fifth argument of getsockopt() amongst other things. This is now
4672 configurable by a macro called SOCKLEN_T which defaults to socklen_t, but
4673 can be set for individual OS. I have set it for SunOS5, OSF1, and
4674 Unixware7. Current versions of SunOS5 (aka Solaris) do have socklen_t, but
4675 some earlier ones do not.
4677 7. Change 4.30/15 was not doing the test caselessly.
4679 8. The standard form for an IPv6 address literal was being rejected by address
4680 parsing in, for example, MAIL and RCPT commands. An example of this kind of
4681 address is [IPv6:2002:c1ed:8229:10:202:2dff:fe07:a42a]. Exim now accepts
4682 this, as well as the form without the "IPv6" on the front (but only when
4683 address literals are enabled, of course).
4685 9. Added some casts to avoid compiler warnings in OS/os.c-Linux.
4687 10. Exim crashed if a message with an empty sender address specified by -f
4688 encountered a router with an errors_to setting. This could be provoked only
4689 by a command such as
4693 where an empty string was supplied; "<>" did not hit this bug.
4695 11. Installed PCRE release 4.5.
4697 12. If EHLO/HELO was rejected by an ACL, the value of $sender_helo_name
4698 remained set. It is now erased.
4700 13. exiqgrep wasn't working on MacOS X because it didn't correctly compute
4701 times from message ids (which are base 36 rather than the normal 62).
4703 14. "Expected" SMTP protocol errors that can arise when PIPELINING is in use
4704 were being counted as actual protocol errors, and logged if the log
4705 selector +smtp_protocol_error was set. One cannot be perfect in this test,
4706 but now, if PIPELINING has been advertised, RCPT following a rejected MAIL,
4707 and DATA following a set of rejected RCPTs do not count as protocol errors.
4708 In other words, Exim assumes they were pipelined, though this may not
4709 actually be the case. Of course, in all cases the client gets an
4710 appropriate error code.
4712 15. If a lookup fails in an ACL condition, a message about the failure may
4713 be available; it is used if testing the ACL cannot continue, because most
4714 such messages specify what the cause of the deferral is. However, some
4715 messages (e.g. "MYSQL: no data found") do not cause a defer. There was bug
4716 that caused an old message to be retained and used if a later statement
4717 caused a defer, replacing the real cause of the deferral.
4719 16. If an IP address had so many PTR records that the DNS lookup buffer
4720 was not large enough to hold them, Exim could crash while trying to process
4721 the truncated data. It now detects and logs this case.
4723 17. Further to 4.21/58, another change has been made: if (and only if) the
4724 first line of a message (the first header line) ends with CRLF, a bare LF
4725 in a subsequent header line has a space inserted after it, so as not to
4726 terminate the header.
4728 18. Refactoring: tidied an ugly bit of code in appendfile that copied data
4729 unnecessarily, used atoi() instead of strtol(), and didn't check the
4730 termination when getting file sizes from file names by regex.
4732 19. Completely re-implemented the support for maildirsize files, in the light
4733 of a number of problems with the previous contributed implementation
4734 (4.30/29). In particular:
4736 . If the quota is zero, the maildirsize file is maintained, but no quota is
4739 . If the maildir directory does not exist, it is created before any attempt
4740 to write a maildirsize file.
4742 . The quota value in the file is just a cache; if the quota is changed in
4743 the transport, the new value overrides.
4745 . A regular expression is available for excluding directories from the
4748 20. The autoreply transport checks the characters in options that define the
4749 message's headers; it allows continued headers, but it was checking with
4750 isspace() after an embedded newline instead of explicitly looking for a
4753 21. If all the "regular" hosts to which an address was routed had passed their
4754 expiry times, and had not reached their retry times, the address was
4755 bounced, even if fallback hosts were defined. Now Exim should go on to try
4758 22. Increased buffer sizes in the callout code from 1024 to 4096 to match the
4759 equivalent code in the SMTP transport. Some hosts send humungous responses
4760 to HELO/EHLO, more than 1024 it seems.
4762 23. Refactoring: code in filter.c used (void *) for "any old type" but this
4763 gives compiler warnings in some environments. I've now done it "properly",
4766 24. The replacement for inet_ntoa() that is used with gcc on IRIX systems
4767 (because of problems with the built-in one) was declared to return uschar *
4768 instead of char *, causing compiler failure.
4770 25. Fixed a file descriptor leak when processing alias/forward files.
4772 26. Fixed a minor format string issue in dbfn.c.
4774 27. Typo in exim.c: ("dmbnz" for "dbmnz").
4776 28. If a filter file refered to $h_xxx or $message_headers, and the headers
4777 contained RFC 2047 "words", Exim's memory could, under certain conditions,
4780 29. When a sender address is verified, it is cached, to save repeating the test
4781 when there is more than one recipient in a message. However, when the
4782 verification involves a callout, it is possible for different callout
4783 options to be set for different recipients. It is too complicated to keep
4784 track of this in the cache, so now Exim always runs a verification when a
4785 callout is required, relying on the callout cache for the optimization.
4786 The overhead is duplication of the address routing, but this should not be
4789 30. Fixed a bug in callout caching. If a RCPT command caused the sender address
4790 to be verified with callout=postmaster, and the main callout worked but the
4791 postmaster check failed, the verification correctly failed. However, if a
4792 subsequent RCPT command asked for sender verification *without* the
4793 postmaster check, incorrect caching caused this verification also to fail,
4796 31. Exim caches DNS lookup failures so as to avoid multiple timeouts; however,
4797 it was not caching the DNS options (qualify_single, search_parents) that
4798 were used when the lookup failed. A subsequent lookup with different
4799 options therefore always gave the same answer, though there were cases
4800 where it should not have. (Example: a "domains = !$mx_any" option on a
4801 dnslookup router: the "domains" option is always processed without any
4802 widening, but the router might have qualify_single set.) Now Exim uses the
4803 cached value only when the same options are set.
4805 32. Added John Jetmore's "exipick" utility to the distribution.
4807 33. GnuTLS: When an attempt to start a TLS session fails for any reason other
4808 than a timeout (e.g. a certificate is required, and is not provided), an
4809 Exim server now closes the connection immediately. Previously it waited for
4810 the client to close - but if the client is SSL, it seems that they each
4811 wait for each other, leading to a delay before one of them times out.
4813 34: GnuTLS: Updated the code to use the new GnuTLS 1.0.0 API. I have not
4814 maintained 0.8.x compatibility because I don't think many are using it, and
4815 it is clearly obsolete.
4817 35. Added TLS support for CRLs: a tls_crl global option and one for the smtp
4820 36. OpenSSL: $tls_certificate_verified was being set to 1 even if the
4821 client certificate was expired. A simple patch fixes this, though I don't
4822 understand the full logic of why the verify callback is called multiple
4825 37. OpenSSL: a patch from Robert Roselius: "Enable client-bug workaround.
4826 Versions of OpenSSL as of 0.9.6d include a 'CBC countermeasure' feature,
4827 which causes problems with some clients (such as the Certicom SSL Plus
4828 library used by Eudora). This option, SSL_OP_DONT_INSERT_EMPTY_FRAGMENTS,
4829 disables the coutermeasure allowing Eudora to connect."
4831 38. Exim was not checking that a write() to a log file succeeded. This could
4832 lead to Bad Things if a log got too big, in particular if it hit a file
4833 size limit. Exim now panics and dies if it cannot write to a log file, just
4834 as it does if it cannot open a log file.
4836 39. Modified OS/Makefile-Linux so that it now contains
4838 CFLAGS=-O -D_FILE_OFFSET_BITS=64 -D_LARGEFILE_SOURCE
4840 The two -D definitions ensure that Exim is compiled with large file
4841 support, which makes it possible to handle log files that are bigger than
4844 40. Fixed a subtle caching bug: if (in an ACL or a set of routers, for
4845 instance) a domain was checked against a named list that involved a lookup,
4846 causing $domain_data to be set, then another domain was checked against the
4847 same list, then the first domain was re-checked, the value of $domain_data
4848 after the final check could be wrong. In particular, if the second check
4849 failed, it could be set empty. This bug probably also applied to
4852 41. The strip_trailing_dot option was not being applied to the address given
4853 with the -f command-line option.
4855 42. The code for reading a message's header from the spool was incrementing
4856 $received_count, but never initializing it. This meant that the value was
4857 incorrect (doubled) while delivering a message in the same process in which
4858 it was received. In the most common configuration of Exim, this never
4859 happens - a fresh exec is done - but it can happen when
4860 deliver_drop_privilege is set.
4862 43. When Exim logs an SMTP synchronization error - client data sent too soon -
4863 it now includes up to 150 characters of the unexpected data in the log
4866 44. The exim_dbmbuild utility uses fixed size buffers for reading input lines
4867 and building data strings. The size of both of these buffers was 10 000
4868 bytes - far larger than anybody would *ever* want, thought I. Needless to
4869 say, somebody hit the limit. I have increased the maximum line length to
4870 20 000 and the maximum data length of concatenated lines to 100 000. I have
4871 also fixed two bugs, because there was no checking on these buffers. Tsk,
4872 tsk. Now exim_dbmbuild gives a message and exits with an error code if a
4873 buffer is too small.
4875 45. The exim_dbmbuild utility did not support quoted keys, as Exim does in
4876 lsearch lookups. Now it does.
4878 46. When parsing a route_list item in a manualroute router, a fixed-length
4879 buffer was used for the list of hosts. I made this 1024 bytes long,
4880 thinking that nobody would ever have a list of hosts that long. Wrong.
4881 Somebody had a whole pile of complicated expansion conditions, and the
4882 string was silently truncated, leading to an expansion error. It turns out
4883 that it is easier to change to an unlimited length (owing to other changes
4884 that have happened since this code was originally written) than to build
4885 structure for giving a limitation error. The length of the item that
4886 expands into the list of hosts is now unlimited.
4888 47. The lsearch lookup could not handle data where the length of text line was
4889 more than 4095 characters. Such lines were truncated, leading to shortened
4890 data being returned. It should now handle lines of any length.
4892 48. Minor wording revision: "cannot test xxx in yyy ACL" becomes "cannot test
4893 xxx condition in yyy ACL" (e.g. "cannot test domains condition in DATA
4896 49. Cosmetic tidy to scripts like exicyclog that are generated by globally
4897 replacing strings such as BIN_DIRECTORY in a source file: the replacement
4898 no longer happens in comment lines. A list of replacements is now placed
4899 at the head of all of the source files, except those whose only change is
4900 to replace PERL_COMMAND in the very first #! line.
4902 50. Replaced the slow insertion sort in queue.c, for sorting the list of
4903 messages on the queue, with a bottom-up merge sort, using code contributed
4904 by Michael Haardt. This should make operations like -bp somewhat faster on
4905 large queues. It won't affect queue runners, except when queue_run_in_order
4908 51. Installed eximstats 1.31 in the distribution.
4910 52. Added support for SRV lookups to the dnslookup router.
4912 53. If an ACL referred to $message_body or $message_body_end, the value was not
4913 reset for any messages that followed in the same SMTP session.
4915 54. The store-handling optimization for building very long strings was not
4916 differentiating between the different store pools. I don't think this
4917 actually made any difference in practice, but I've tidied it.
4919 55. While running the routers to verify a sender address, $sender_address
4920 was still set to the sender address. This is wrong, because when routing to
4921 send a bounce to the sender, it would be empty. Therefore, I have changed
4922 it so that, while verifying a sender address, $sender_address is set to <>.
4923 (There is no change to what happens when verifying a recipient address.)
4925 56. After finding MX (or SRV) records, Exim was doing a DNS lookup for the
4926 target A or AAAA records (if not already returned) without resetting the
4927 qualify_single or search_parents options of the DNS resolver. These are
4928 inappropriate in this case because the targets of MX and SRV records must
4929 be FQDNs. A broken DNS record could cause trouble if it happened to have a
4930 target that, when qualified, matched something in the local domain. These
4931 two options are now turned off when doing these lookups.
4933 57. It seems that at least some releases of Reiserfs (which does not have the
4934 concept of a fixed number of inodes) returns zero and not -1 for the
4935 number of available inodes. This interacted badly with check_spool_inodes,
4936 which assumed that -1 was the "no such thing" setting. What I have done is
4937 to check that the total number of inodes is greater than zero before doing
4938 the test of how many are available.
4940 58. When a "warn" ACL statement has a log_message modifier, the message is
4941 remembered, and not repeated. This is to avoid a lot of repetition when a
4942 message has many recipients that cause the same warning to be written.
4943 Howewer, Exim was preserving the list of already written lines for an
4944 entire SMTP session, which doesn't seem right. The memory is now reset if a
4945 new message is started.
4947 59. The "rewrite" debugging flag was not showing the result of rewriting in the
4948 debugging output unless log_rewrite was also set.
4950 60. Avoid a compiler warning on 64-bit systems in dsearch.c by avoiding the use
4951 of (int)(handle) when we know that handle contains (void *)(-1).
4953 61. The Exim daemon panic-logs an error return when it closes the incoming
4954 connection. However "connection reset by peer" seems to be common, and
4955 isn't really an error worthy of noting specially, so that particular error
4958 62. When Exim is trying to find all the local interfaces, it used to panic and
4959 die if the ioctl to get the interface flags failed. However, it seems that
4960 on at least one OS (Solaris 9) it is possible to have an interface that is
4961 included in the list of interfaces, but for which you get a failure error
4962 for this call. This happens when the interface is not "plumbed" into a
4963 protocol (i.e. neither IPv4 nor IPv6). I've changed the code so that a
4964 failure of the "get flags" call assumes that the interface is down.
4966 63. Added a ${eval10: operator, which assumes all numbers are decimal. This
4967 makes life easier for people who are doing arithmetic on fields extracted
4968 from dates, where you often get leading zeros that should not be
4969 interpreted as octal.
4971 64. Added qualify_domain to the redirect router, to override the global
4974 65. If a pathologically long header line contained very many addresses (the
4975 report of this problem mentioned 10 000) and each of them was rewritten,
4976 Exim could use up a very large amount of memory. (It kept on making new
4977 copies of the header line as it rewrote, and never released the old ones.)
4978 At the expense of a bit more processing, the header rewriting function has
4979 been changed so that it no longer eats memory in this way.
4981 66. The generation of the Received: header has been moved from the time that a
4982 message starts to be received, to the time that it finishes. The timestamp
4983 in the Received: header should now be very close to that of the <= log
4984 line. There are two side-effects of this change:
4986 (a) If a message is rejected by a DATA or non-SMTP ACL or local_scan(), the
4987 logged header lines no longer include the local Received: line, because
4988 it has not yet been created. The same applies to a copy of the message
4989 that is returned to a non-SMTP sender when a message is rejected.
4991 (b) When a filter file is tested using -bf, no additional Received: header
4992 is added to the test message. After some thought, I decided that this
4995 This change does not affect the value of $received_for. It is still set
4996 after address rewriting, but before local_scan() is called.
4998 67. Installed the latest Cygwin-specific files from the Cygwin maintainer.
5000 68. GnuTLS: If an empty file is specified for tls_verify_certificates, GnuTLS
5001 gave an unhelpful panic error message, and a defer error. I have managed to
5002 change this behaviour so that it now rejects any supplied certificate,
5003 which seems right, as the list of acceptable certificates is empty.
5005 69. OpenSSL: If an empty file is specified for tls_verify_certificates, OpenSSL
5006 gave an unhelpful defer error. I have not managed to make this reject any
5007 supplied certificates, but the error message it gives is "no certificate
5008 supplied", which is not helpful.
5010 70. exigrep's output now also includes lines that are not associated with any
5011 message, but which match the given pattern. Implemented by a patch from
5012 Martin Sluka, which also tidied up the Perl a bit.
5014 71. Recipient callout verification, like sender verification, was using <> in
5015 the MAIL FROM command. This isn't really the right thing, since the actual
5016 sender may affect whether the remote host accepts the recipient or not. I
5017 have changed it to use the actual sender in the callout; this means that
5018 the cache record is now keyed on a recipient/sender pair, not just the
5019 recipient address. There doesn't seem to be a real danger of callout loops,
5020 since a callout by the remote host to check the sender would use <>.
5021 [SEE ABOVE: changed after hitting problems.]
5023 72. Exim treats illegal SMTP error codes that do not begin with 4 or 5 as
5024 temporary errors. However, in the case of such a code being given after
5025 the end of a data transmission (i.e. after ".") Exim was failing to write
5026 a retry record for the message. (Yes, there was some broken host that was
5027 actually sending 8xx at this point.)
5029 73. An unknown lookup type in a host list could cause Exim to panic-die when
5030 the list was checked. (An example that provoked this was putting <; in the
5031 middle of a list instead of at the start.) If this happened during a DATA
5032 ACL check, a -D file could be left lying around. This kind of configuration
5033 error no longer causes Exim to die; instead it causes a defer errror. The
5034 incident is still logged to the main and panic logs.
5036 74. Buglet left over from Exim 3 conversion. The message "too many messages
5037 in one connection" was written to the rejectlog but not the mainlog, except
5038 when address rewriting (yes!) was being logged.
5040 75. Added write_rejectlog option.
5042 76. When a system filter was run not as root (that is, when system_filter_user
5043 was set), the values of the $n variables were not being returned to the
5044 main process; thus, they were not subsequently available in the $sn
5047 77. Added +return_path_on_delivery log selector.
5049 78. A connection timeout was being treated differently from recipients deferred
5050 when testing hosts_max_try with a message that was older than the host's
5051 retry timeout. (The host should not be counted, thus allowing all hosts to
5052 be tried at least once before bouncing.) This may have been the cause of an
5053 occasionally reported bug whereby a message would remain on the queue
5054 longer than the retry timeout, but would be bounced if a delivery was
5055 forced. I say "may" because I never totally pinned down the problem;
5056 setting up timeout/retry tests is difficult. See also the next item.
5058 79. The ultimate address timeout was not being applied to errors that involved
5059 a combination of host plus message (for example, a timeout on a MAIL
5060 command). When an address resolved to a number of possible hosts, and they
5061 were not all tried for each delivery (e.g. because of hosts_max_try), a
5062 message could remain on the queue longer than the retry timeout.
5064 80. Sieve bug: "stop" inside "elsif" was broken. Applied a patch from Michael
5067 81. Fixed an obscure SMTP outgoing bug which required at least the following
5068 conditions: (a) there was another message waiting for the same server;
5069 (b) the server returned 5xx to all RCPT commands in the first message so
5070 that the message was not completed; (c) the server dropped the connection
5071 or gave a negative response to the RSET that Exim sends to abort the
5072 transaction. The observed case was a dropped connection after DATA that had
5073 been sent in pipelining mode. That is, the server had advertised PIPELINING
5074 but was not implementing it correctly. The effect of the bug was incorrect
5075 behaviour, such as trying another host, and this could lead to a crash.
5081 1. The 3rd arguments to getsockname(), getpeername(), and accept() in exim.c
5082 and daemon.c were passed as pointers to ints; they should have been
5083 pointers to socklen_t variables (which are typically unsigned ints).
5085 2. Some signed/unsigned type warnings in the os.c file for Linux have been
5088 3. Fixed a really odd bug that affected only the testing scheme; patching a
5089 certain fixed string in the binary changed the value of another string that
5090 happened to be identical to the end of the original first string.
5092 4. When gethostbyname() (or equivalent) is passed an IP address as a "host
5093 name", it returns that address as the IP address. On some operating
5094 systems (e.g. Solaris), it also passes back the IP address string as the
5095 "host name". However, on others (e.g. Linux), it passes back an empty
5096 string. Exim wasn't checking for this, and was changing the host name to an
5097 empty string, assuming it had been canonicized.
5099 5. Although rare, it is permitted to have more than one PTR record for a given
5100 IP address. I thought that gethostbyaddr() or getipnodebyaddr() always gave
5101 all the names associated with an address, because they do in Solaris.
5102 However, it seems that they do not in Linux for data that comes from the
5103 DNS. If an address in /etc/hosts has multiple names, they _are_ all given.
5104 I found this out when I moved to a new Linux workstation and tried to run
5105 the Exim test suite.
5107 To get round this problem I have changed the code so that it now does its
5108 own call to the DNS to look up PTR records when searching for a host name.
5109 If nothing can be found in the DNS, it tries gethostbyaddr(), so that
5110 addresses that are only in /etc/hosts are still found.
5112 This behaviour is, however, controlled by an option called host_lookup_
5113 order, which defaults to "bydns:byaddr". If people want to use the other
5114 order, or indeed, just use one or the other means of lookup, they can
5115 specify it in this variable.
5117 6. If a PTR record yields an empty name, Exim treats it as non-existent. In
5118 some operating systems, this comes back from gethostbyaddr() as an empty
5119 string, and this is what Exim used to test for. However, it seems that in
5120 other systems, "." is yielded. Exim now tests for this case too.
5122 7. The values of check_spool_space and check_log_space are now held internally
5123 as a number of kilobytes instead of an absolute number of bytes. If a
5124 numbers is specified without 'K' or 'M', it is rounded up to the nearest
5125 kilobyte. This means that much larger values can be stored.
5127 8. Exim monitor: an attempt to get the action menu when not actually pointing
5128 at a message produces an empty menu entitled "No message selected". This
5129 works on Solaris (OpenWindows). However, XFree86 does not like a menu with
5130 no entries in it ("Shell widget menu has zero width and/or height"). So I
5131 have added a single, blank menu entry in this case.
5133 9. Added ${quote_local_part.
5135 10. MIME decoding is now applied to the contents of Subject: header lines when
5138 11. Now that a reference to $sender_host_address automatically causes a reverse
5139 lookup to occur if necessary (4.13/18), there is no need to arrange for a
5140 host lookup before query-style lookups in lists that might use this
5141 variable. This has therefore been abolished, and the "net-" prefix is no
5142 longer necessary for query-style lookups.
5144 12. The Makefile for SCO_SV contained a setting of LDFLAGS. This appears to
5145 have been a typo for LFLAGS, so it has been changed.
5147 13. The install script calls Exim with "-C /dev/null" in order to find the
5148 version number. If ALT_CONFIG_PREFIX was set, this caused an error message
5149 to be output. Howeve, since Exim outputs its version number before the
5150 error, it didn't break the script. It just looked ugly. I fixed this by
5151 always allowing "-C /dev/null" if the caller is root.
5153 14. Ignore overlarge ACL variable number when reading spool file - insurance
5154 against a later release with more variables having written the file.
5156 15. The standard form for an IPv6 address literal was being rejected by EHLO.
5157 Example: [IPv6:2002:c1ed:8229:10:202:2dff:fe07:a42a]. Exim now accepts
5158 this, as well as the form without the "IPv6" on the front.
5160 16. Added CHOWN_COMMAND=/usr/sbin/chown and LIBS=-lresolv to the
5161 OS/Makefile-Darwin file.
5163 17. Fixed typo in lookups/ldap.c: D_LOOKUP should be D_lookup. This applied
5164 only to LDAP libraries that do not have LDAP_OPT_DEREF.
5166 18. After change 4.21/52, "%ld" was used to format the contents of the $inode
5167 variable. However, some OS use ints for inodes. I've added cast to long int
5168 to get rid of the compiler warning.
5170 19. I had forgotten to lock out "/../" in configuration file names when
5171 ALT_CONFIG_PREFIX was set.
5173 20. Routers used for verification do not need to specify transports. However,
5174 if such a router generated a host list, and callout was configured, Exim
5175 crashed, because it could not find a port number from the (non-existent)
5176 transport. It now assumes port 25 in this circumstance.
5178 21. Added the -t option to exigrep.
5180 22. If LOOKUP_LSEARCH is defined, all three linear search methods (lsearch,
5181 wildlsearch, nwildlsearch) are compiled. LOOKUP_WILDLSEARCH and LOOKUP_
5182 NWILDLSEARCH are now obsolete, but retained for compatibility. If either of
5183 them is set, LOOKUP_LSEARCH is forced.
5185 23. "exim -bV" now outputs a list of lookups that are included in the binary.
5187 24. Added sender and host information to the "rejected by local_scan()" log
5188 line; previously there was no indication of these.
5190 25. Added .include_if_exists.
5192 26. Change 3.952/11 added an explicit directory sync on top of a file sync for
5193 Linux. It turns out that not all file systems support this. Apparently some
5194 versions of NFS do not. (It's rare to put Exim's spool on NFS, but people
5195 do it.) To cope with this, the error EINVAL, which means that sync-ing is
5196 not supported on the file descriptor, is now ignored when Exim is trying to
5197 sync a directory. This applies only to Linux.
5199 27. Added -DBIND_8_COMPAT to the CLFAGS setting for Darwin.
5201 28. In Darwin (MacOS X), the PAM headers are in /usr/include/pam and not in
5202 /usr/include/security. There's now a flag in OS/os.h-Darwin to cope with
5205 29. Added support for maildirsize files from supplied patch (modified a bit).
5207 30. The use of :fail: followed by an empty string could lead Exim to respond to
5208 sender verification failures with (e.g.):
5210 550 Verification failed for <xxx>
5211 550 Sender verify failed
5213 where the first response line was missing the '-' that indicates it is not
5214 the final line of the response.
5216 31. The loop for finding the name of the user that called Exim had a hardwired
5217 limit of 10; it now uses the value of finduser_retries, which is used for
5218 all other user lookups.
5220 32. Added $received_count variable, available in data and not_smtp ACLs, and at
5223 33. Exim was neglecting to zero errno before one call of strtol() when
5224 expanding a string and expecting an integer value. On some systems this
5225 resulted in spurious "integer overflow" errors. Also, it was casting the
5226 result into an int without checking.
5228 34. Testing for a connection timeout using "timeout_connect" in the retry rules
5229 did not work. The code looks as if it has *never* worked, though it appears
5230 to have been documented since at least releast 1.62. I have made it work.
5232 35. The "timeout_DNS" error in retry rules, also documented since at least
5233 1.62, also never worked. As it isn't clear exactly what this means, and
5234 clearly it isn't a major issue, I have abolished the feature by treating it
5235 as "timeout", and writing a warning to the main and panic logs.
5237 36. The display of retry rules for -brt wasn't always showing the error code
5240 37. Added new error conditions to retry rules: timeout_A, timeout_MX,
5241 timeout_connect_A, timeout_connect_MX.
5243 38. Rewriting the envelope sender at SMTP time did not allow it to be rewritten
5244 to the empty sender.
5246 39. The daemon was not analysing the content of -oX till after it had closed
5247 stderr and disconnected from the controlling terminal. This meant that any
5248 syntax errors were only noted on the panic log, and the return code from
5249 the command was 0. By re-arranging the code a little, I've made the
5250 decoding happen first, so such errors now appear on stderr, and the return
5251 code is 1. However, the actual setting up of the sockets still happens in
5252 the disconnected process, so errors there are still only recorded on the
5255 40. A daemon listener on a wildcard IPv6 socket that also accepts IPv4
5256 connections (as happens on some IP stacks) was logged at start up time as
5257 just listening for IPv6. It now logs "IPv6 with IPv4". This differentiates
5258 it from "IPv6 and IPv4", which means that two separate sockets are being
5261 41. The debug output for gethostbyname2() or getipnodebyname() failures now
5262 says whether AF_INET or AF_INET6 was passed as an argument.
5264 42. Exiwhat output was messed up when time zones were included in log
5267 43. Exiwhat now gives more information about the daemon's listening ports,
5268 and whether -tls-on-connect was used.
5270 44. The "port" option of the smtp transport is now expanded.
5272 45. A "message" modifier in a "warn" statement in a non-message ACL was being
5273 silently ignored. Now an error message is written to the main and panic
5276 46. There's a new ACL modifier called "logwrite" which writes to a log file
5277 as soon as it is encountered.
5279 47. Added $local_user_uid and $local_user_gid at routing time.
5281 48. Exim crashed when trying to verify a sender address that was being
5284 49. Exim was recognizing only a space character after ".include". It now also
5285 recognizes a tab character.
5287 50. Fixed several bugs in the Perl script that creates the exim.8 man page by
5288 extracting the relevant information from the specification. The man page no
5289 longer contains scrambled data for the -d option, and I've added a section
5290 at the front about calling Exim under different names.
5292 51. Added "extra_headers" argument to the "mail" command in filter files.
5294 52. Redirecting mail to an unqualified address in a Sieve filter caused Exim to
5297 53. Installed eximstats 1.29.
5299 54. Added transport_filter_timeout as a generic transport option.
5301 55. Exim no longer adds an empty Bcc: header to messages that have no To: or
5302 Cc: header lines. This was required by RFC 822, but it not required by RFC
5305 56. Exim used to add From:, Date:, and Message-Id: header lines to any
5306 incoming messages that did not have them. Now it does so only if the
5307 message originates locally, that is, if there is no associated remote host
5308 address. When Resent- header lines are present, this applies to the Resent-
5309 lines rather than the non-Resent- lines.
5311 57. Drop incoming SMTP connection after too many syntax or protocol errors. The
5312 limit is controlled by smtp_max_synprot_errors, defaulting to 3.
5314 58. Messages for configuration errors now include the name of the main
5315 configuration file - useful now that there may be more than one file in a
5316 list (.included file names were always shown).
5318 59. Change 4.21/82 (run initgroups() when starting the daemon) causes problems
5319 for those rare installations that do not start the daemon as root or run it
5320 setuid root. I've cut out the call to initgroups() if the daemon is not
5323 60. The Exim user and group can now be bound into the binary as text strings
5324 that are looked up at the start of Exim's processing.
5326 61. Applied a small patch for the Interbase code, supplied by Ard Biesheuvel.
5328 62. Added $mailstore_basename variable.
5330 63. Installed patch to sieve.c from Michael Haardt.
5332 64. When Exim failed to open the panic log after failing to open the main log,
5333 the original message it was trying to log was written to stderr and debug
5334 output, but if they were not available (the usual case in production), it
5335 was lost. Now it is written to syslog before the two lines that record the
5336 failures to open the logs.
5338 65. Users' Exim filters run in subprocesses under the user's uid. It is
5339 possible for a "deliver" command or an alias in a "personal" command to
5340 provoke an address rewrite. If logging of address rewriting is configured,
5341 this fails because the process is not running as root or exim. There may be
5342 a better way of dealing with this, but for the moment (because 4.30 needs
5343 to be released), I have disabled address rewrite logging when running a
5344 filter in a non-root, non-exim process.
5350 1. The buildconfig auxiliary program wasn't quoting the value set for
5351 HEADERS_CHARSET. This caused a compilation error complaining that 'ISO' was
5352 not defined. This bug was masked in 4.22 by the effect that was fixed in
5355 2. Some messages that were rejected after a message id was allocated were
5356 shown as "incomplete" by exigrep. It no longer does this for messages that
5357 are rejected by local_scan() or the DATA or non-SMTP ACLs.
5359 3. If a Message-ID: header used a domain literal in the ID, and Exim did not
5360 have allow_domain_literals set, the ID did not get logged in the <= line.
5361 Domain literals are now always recognized in Message-ID: header lines.
5363 4. The first argument for a ${extract expansion item is the key name or field
5364 number. Leading and trailing spaces in this item were not being ignored,
5365 causing some misleading effects.
5367 5. When deliver_drop_privilege was set, single queue runner processes started
5368 manually (i.e. by the command "exim -q") or by the daemon (which uses the
5369 same command in the process it spins off) were not dropping privilege.
5371 6. When the daemon running as "exim" started a queue runner, it always
5372 re-executed Exim in the spun-off process. This is a waste of effort when
5373 deliver_drop_privilege is set. The new process now just calls the
5374 queue-runner function directly.
5380 1. Typo in the src/EDITME file: it referred to HEADERS_DECODE_TO instead of
5383 2. Change 4.21/73 introduced a bug. The pid file path set by -oP was being
5384 ignored. Though the use of -oP was forcing the writing of a pid file, it
5385 was always written to the default place.
5387 3. If the message "no IP address found for host xxxx" is generated during
5388 incoming verification, it is now followed by identification of the incoming
5389 connection (so you can more easily find what provoked it).
5391 4. Bug fix for Sieve filters: "stop" inside a block was not working properly.
5393 5. Added some features to "harden" Exim a bit more against certain attacks:
5395 (a) There is now a build-time option called FIXED_NEVER_USERS that can
5396 be put in Local/Makefile. This is like the never_users runtime option,
5397 but it cannot be overridden. The default setting is "root".
5399 (b) If ALT_CONFIG_PREFIX is defined in Local/Makefile, it specifies a
5400 prefix string with which any file named in a -C command line option
5403 (c) If ALT_CONFIG_ROOT_ONLY is defined in Local/Makefile, root privilege
5404 is retained for -C and -D only if the caller of Exim is root. Without
5405 it, the exim user may also use -C and -D and retain privilege.
5407 (d) If DISABLE_D_OPTION is defined in Local/Makefile, the use of the -D
5408 command line option is disabled.
5410 6. Macro names set by the -D option must start with an upper case letter, just
5411 like macro names defined in the configuration file.
5413 7. Added "dereference=" facility to LDAP.
5415 8. Two instances of the typo "uknown" in the source files are fixed.
5417 9. If a PERL_COMMAND setting in Local/Makefile was not at the start of a line,
5418 the Configure-Makefile script screwed up while processing it.
5420 10. Incorporated PCRE 4.4.
5422 11. The SMTP synchronization check was not operating right at the start of an
5423 SMTP session. For example, it could not catch a HELO sent before the client
5424 waited for the greeting. There is now a check for outstanding input at the
5425 point when the greeting is written. Because of the duplex, asynchronous
5426 nature of TCP/IP, it cannot be perfect - the incorrect input may be on its
5427 way, but not yet received, when the check is performed.
5429 12. Added tcp_nodelay to make it possible to turn of the setting of TCP_NODELAY
5430 on TCP/IP sockets, because this apparently causes some broken clients to
5433 13. Installed revised OS/Makefile-CYGWIN and OS/os.c-cygwin (the .h file was
5434 unchanged) from the Cygwin maintainer.
5436 14. The code for -bV that shows what is in the binary showed "mbx" when maildir
5437 was supported instead of testing for mbx. Effectively a typo.
5439 15. The spa authenticator server code was not checking that the input it
5440 received was valid base64.
5442 16. The debug output line for the "set" modifier in ACLs was not showing the
5443 name of the variable that was being set.
5445 17. Code tidy: the variable type "vtype_string" was never used. Removed it.
5447 18. Previously, a reference to $sender_host_name did not cause a DNS reverse
5448 lookup on its own. Something else was needed to trigger the lookup. For
5449 example, a match in host_lookup or the need for a host name in a host list.
5450 Now, if $sender_host_name is referenced and the host name has not yet been
5451 looked up, a lookup is performed. If the lookup fails, the variable remains
5452 empty, and $host_lookup_failed is set to "1".
5454 19. Added "eqi" as a case-independent comparison operator.
5456 20. The saslauthd authentication condition could segfault if neither service
5457 nor realm was specified.
5459 21. If an overflowing value such as "2048M" was set for message_size_limit, the
5460 error message that was logged was misleading, and incoming SMTP
5461 connections were dropped. The message is now more accurate, and temporary
5462 errors are given to SMTP connections.
5464 22. In some error situations (such as 21 above) Exim rejects all SMTP commands
5465 (except RSET) with a 421 error, until QUIT is received. However, it was
5466 failing to send a response to QUIT.
5468 23. The HELO ACL was being run before the code for helo_try_verify_hosts,
5469 which made it impossible to use "verify = helo" in the HELO ACL. The HELO
5470 ACL is now run after the helo_try_verify_hosts code.
5472 24. "{MD5}" and "{SHA1}" are now recognized as equivalent to "{md5"} and
5473 "{sha1}" in the "crypteq" expansion condition (in fact the comparison is
5474 case-independent, so other case variants are also recognized). Apparently
5475 some systems use these upper case variants.
5477 25. If more than two messages were waiting for the same host, and a transport
5478 filter was specified for the transport, Exim sent two messages over the
5479 same TCP/IP connection, and then failed with "socket operation on non-
5480 socket" when it tried to send the third.
5482 26. Added Exim::debug_write and Exim::log_write for embedded Perl use.
5484 27. The extern definition of crypt16() in expand.c was not being excluded when
5485 the OS had its own crypt16() function.
5487 28. Added bounce_return_body as a new option, and bounce_return_size_limit
5488 as a preferred synonym for return_size_limit, both as an option and as an
5491 29. Added LIBS=-liconv to OS/Makefile-OSF1.
5493 30. Changed the default configuration ACL to relax the local part checking rule
5494 for addresses that are not in any local domains. For these addresses,
5495 slashes and pipe symbols are allowed within local parts, but the sequence
5496 /../ is explicitly forbidden.
5498 31. SPA server authentication was not clearing the challenge buffer before
5501 32. log_message in a "warn" ACL statement was writing to the reject log as
5502 well as to the main log, which contradicts the documentation and doesn't
5503 seem right (because no rejection is happening). So I have stopped it.
5505 33. Added Ard Biesheuvel's lookup code for accessing an Interbase database.
5506 However, I am unable to do any testing of this.
5508 34. Fixed an infelicity in the appendfile transport. When checking directories
5509 for a mailbox, to see if any needed to be created, it was accidentally
5510 using path names with one or more superfluous leading slashes; tracing
5511 would show up entries such as stat("///home/ph10", 0xFFBEEA48).
5513 35. If log_message is set on a "discard" verb in a MAIL or RCPT ACL, its
5514 contents are added to the log line that is written for every discarded
5515 recipient. (Previously a log_message setting was ignored.)
5517 36. The ${quote: operator now quotes the string if it is empty.
5519 37. The install script runs exim in order to find its version number. If for
5520 some reason other than non-existence or emptiness, which it checks, it
5521 could not run './exim', it was installing it with an empty version number,
5522 i.e. as "exim-". This error state is now caught, and the installation is
5525 38. An argument was missing from the function that creates an error message
5526 when Exim fails to connect to the socket for saslauthd authentication.
5527 This could cause Exim to crash, or give a corrupted message.
5529 39. Added isip, isip4, and isip6 to ${if conditions.
5531 40. The ACL variables $acl_xx are now saved with the message, and can be
5532 accessed later in routers, transports, and filters.
5534 41. The new lookup type nwildlsearch is like wildlsearch, except that the key
5535 strings in the file are not string-expanded.
5537 42. If a MAIL command specified a SIZE value that was too large to fit into an
5538 int variable, the check against message_size_limit failed. Such values are
5539 now forced to INT_MAX, which is around 2Gb for a 32-bit variable. Maybe one
5540 day this will have to be increased, but I don't think I want to be around
5541 when emails are that large.
5548 1. Removed HAVE_ICONV=yes from OS/Makefile-FreeBSD, since it seems that
5549 iconv() is not standard in FreeBSD.
5551 2. Change 4.21/17 was buggy and could cause stack overwriting on a system with
5552 IPv6 enabled. The observed symptom was a segmentation fault on return from
5553 the function os_common_find_running_interfaces() in src/os.c.
5555 3. In the check_special_case() function in daemon.c I had used "errno" as an
5556 argument name, which causes warnings on some systems. This was basically a
5557 typo, since it was named "eno" in the comments!
5559 4. The code that waits for the clock to tick (at a resolution of some fraction
5560 of a second) so as to ensure message-id uniqueness was always waiting for
5561 at least one whole tick, when it could have waited for less. [This is
5562 almost certainly not relevant at current processor speeds, where it is
5563 unlikely to ever wait at all. But we try to future-proof.]
5565 5. The function that sleeps for a time interval that includes fractions of a
5566 second contained a race. It did not block SIGALRM between setting the
5567 timer, and suspending (a couple of lines later). If the interval was short
5568 and the sigsuspend() was delayed until after it had expired, the suspension
5569 never ended. On busy systems this could lead to processes getting stuck for
5572 6. Some uncommon configurations may cause a lookup to happen in a queue runner
5573 process, before it forks any delivery processes. The open lookup caching
5574 mechanism meant that the open file or database connection was passed into
5575 the delivery process. The problem was that delivery processes always tidy
5576 up cached lookup data. This could cause a problem for the next delivery
5577 process started by the queue runner, because the external queue runner
5578 process does not know about the closure. So the next delivery process
5579 still has data in the lookup cache. In the case of a file lookup, there was
5580 no problem because closing a file descriptor in a subprocess doesn't affect
5581 the parent. However, if the lookup was caching a connection to a database,
5582 the connection was closed, and the second delivery process was likely to
5583 see errors such as "PGSQL: query failed: server closed the connection
5584 unexpectedly". The problem has been fixed by closing all cached lookups
5585 in a queue runner before running a delivery process.
5587 7. Compiler warning on Linux for the second argument of iconv(), which doesn't
5588 seem to have the "const" qualifier which it has on other OS. I've
5591 8. Change 4.21/2 was too strict. It is only if there are two authenticators
5592 *of the same type* (client or server) with the same public name that an
5593 error should be diagnosed.
5595 9. When Exim looked up a host name for an IP address, but failed to find the
5596 original IP address when looking up the host name (a safety check), it
5597 output the message "<ip address> does not match any IP for NULL", which was
5598 confusing, to say the least. The bug was that the host name should have
5599 appeared instead of "NULL".
5601 10. Since release 3.03, if Exim is called by a uid other than root or the Exim
5602 user that is built into the binary, and the -C or -D options is used, root
5603 privilege is dropped before the configuration file is read. In addition,
5604 logging is switched to stderr instead of the normal log files. If the
5605 configuration then re-defines the Exim user, the unprivileged environment
5606 is probably not what is expected, so Exim logs a panic warning message (but
5609 However, if deliver_drop_privilege is set, the unprivileged state may well
5610 be exactly what is intended, so the warning has been cut out in that case,
5611 and Exim is allowed to try to write to its normal log files.
5617 1. smtp_return_error_details was not giving details for temporary sender
5618 or receiver verification errors.
5620 2. Diagnose a configuration error if two authenticators have the same public
5623 3. Exim used not to create the message log file for a message until the first
5624 delivery attempt. This could be confusing when incoming messages were held
5625 for policy or load reasons. The message log file is now created at the time
5626 the message is received, and an initial "Received" line is written to it.
5628 4. The automatically generated man page for command line options had a minor
5629 bug that caused no ill effects; however, a more serious problem was that
5630 the procedure for building the man page automatically didn't always
5631 operate. Consequently, release 4.20 contains an out-of-date version. This
5632 shouldn't happen again.
5634 5. When building Exim with embedded Perl support, the script that builds the
5635 Makefile was calling 'perl' to find its compile-time parameters, ignoring
5636 any setting of PERL_COMMAND in Local/Makefile. This is now fixed.
5638 6. The freeze_tell option was not being used for messages that were frozen on
5639 arrival, either by an ACL or by local_scan().
5641 7. Added the smtp_incomplete_transaction log selector.
5643 8. After STARTTLS, Exim was not forgetting that it had advertised AUTH, so it
5644 was accepting AUTH without a new EHLO.
5646 9. Added tls_remember_esmtp to cope with YAEB. This allows AUTH and other
5647 ESMTP extensions after STARTTLS without a new EHLO, in contravention of the
5650 10. Logging of TCP/IP connections (when configured) now happens in the main
5651 daemon process instead of the child process, so that the TCP/IP connection
5652 count is more accurate (but it can never be perfect).
5654 11. The use of "drop" in a nested ACL was not being handled correctly in the
5655 outer ACL. Now, if condition failure induced by the nested "drop" causes
5656 the outer ACL verb to deny access ("accept" or "discard" after "endpass",
5657 or "require"), the connection is dropped.
5659 12. Similarly, "discard" in a nested ACL wasn't being handled. A nested ACL
5660 that yield "discard" can now be used with an "accept" or a "discard" verb,
5661 but an error is generated for any others (because I can't see a useful way
5662 to define what should happen).
5664 13. When an ACL is read dynamically from a file (or anywhere else), the lines
5665 are now processed in the same way as lines in the Exim configuration file.
5666 In particular, continuation lines are supported.
5668 14. Added the "dnslists = a.b.c!=n.n.n.n" feature.
5670 15. Added -ti meaning -t -i.
5672 16. Check for letters, digits, hyphens, and dots in the names of dnslist
5673 domains, and warn by logging if others are found.
5675 17. At least on BSD, alignment is not guarenteed for the array of ifreq's
5676 returned from GIFCONF when Exim is trying to find the list of interfaces on
5677 a host. The code in os.c has been modified to copy each ifreq to an aligned
5678 structure in all cases.
5680 Also, in some cases, the returned ifreq's were being copied to a 'struct
5681 ifreq' on the stack, which was subsequently passed to host_ntoa(). That
5682 means the last couple of bytes of an IPv6 address could be chopped if the
5683 ifreq contained only a normal sockaddr (14 bytes storage).
5685 18. Named domain lists were not supported in the hosts_treat_as_local option.
5686 An entry such as +xxxx was not recognized, and was treated as a literal
5689 19. Ensure that header lines added by a DATA ACL are included in the reject log
5690 if the ACL subsequently rejects the message.
5692 20. Upgrade the cramtest.pl utility script to use Digest::MD5 instead of just
5693 MD5 (which is deprecated).
5695 21. When testing a filter file using -bf, Exim was writing a message when it
5696 took the sender from a "From " line in the message, but it was not doing so
5697 when it took $return_path from a Return-Path: header line. It now does.
5699 22. If the contents of a "message" modifier for a "warn" ACL verb do not begin
5700 with a valid header line field name (a series of printing characters
5701 terminated by a colon, Exim now inserts X-ACL-Warn: at the beginning.
5703 23. Changed "disc" in the source to "disk" to conform to the documentation and
5704 the book and for uniformity.
5706 24. Ignore Sendmail's -Ooption=value command line item.
5708 25. When execve() failed while trying to run a command in a pipe transport,
5709 Exim was returning EX_UNAVAILBLE (69) from the subprocess. However, this
5710 could be confused with a return value of 69 from the command itself. This
5711 has been changed to 127, the value the shell returns if it is asked to run
5712 a non-existent command. The wording for the related log line suggests a
5713 non-existent command as the problem.
5715 26. If received_header_text expands to an empty string, do not add a Received:
5716 header line to the message. (Well, it adds a token one on the spool, but
5717 marks it "old" so that it doesn't get used or transmitted.)
5719 27. Installed eximstats 1.28 (addition of -nt option).
5721 28. There was no check for failure on the call to getsockname() in the daemon
5722 code. This can fail if there is a shortage of resources on the system, with
5723 ENOMEM, for example. A temporary error is now given on failure.
5725 29. Contrary to the C standard, it seems that in some environments, the
5726 equivalent of setlocale(LC_ALL, "C") is not obeyed at the start of a C
5727 program. Exim now does this explicitly; it affects the formatting of
5728 timestamps using strftime().
5730 30. If exiqsumm was given junk data, it threw up some uninitialized variable
5731 complaints. I've now initialized all the variables, to avoid this.
5733 32. Header lines added by a system filter were not being "seen" during
5734 transport-time rewrites.
5736 33. The info_callback() function passed to OpenSSL is set up with type void
5737 (*)(SSL *, int, int), as described somewhere. However, when calling the
5738 function (actually a macro) that sets it up, the type void(*)() is
5739 expected. I've put in a cast to prevent warnings from picky compilers.
5741 34. If a DNS black list lookup found a CNAME record, but there were no A
5742 records associated with the domain it pointed at, Exim crashed.
5744 35. If a DNS black list lookup returned more than one A record, Exim ignored
5745 all but the first. It now scans all returned addresses if a particular IP
5746 value is being sought. In this situation, the contents of the
5747 $dnslist_value variable are a list of all the addresses, separated by a
5750 36. Tightened up the rules for host name lookups using reverse DNS. Exim used
5751 to accept a host name and all its aliases if the forward lookup for any of
5752 them yielded the IP address of the incoming connection. Now it accepts only
5753 those names whose forward lookup yields the correct IP address. Any other
5754 names are discarded. This closes a loophole whereby a rogue DNS
5755 administrator could create reverse DNS records to break through a
5756 wildcarded host restriction in an ACL.
5758 37. If a user filter or a system filter that ran in a subprocess used any of
5759 the numerical variables ($1, $2 etc), or $thisaddress, in a pipe command,
5760 the wrong values were passed to the pipe command ($thisaddress had the
5761 value of $0, $0 had the value of $1, etc). This bug was introduced by
5762 change 4.11/101, and not discovered because I wrote an inadequate test. :-(
5764 38. Improved the line breaking for long SMTP error messages from ACLs.
5765 Previously, if there was no break point between 40 and 75 characters, Exim
5766 left the rest of the message alone. Two changes have been made: (a) I've
5767 reduced the minimum length to 35 characters; (b) if it can't find a break
5768 point between 35 and 75 characters, it looks ahead and uses the first one
5769 that it finds. This may give the occasional overlong line, but at least the
5770 remaining text gets split now.
5772 39. Change 82 of 4.11 was unimaginative. It assumed the limit on the number of
5773 file descriptors might be low, and that setting 1000 would always raise it.
5774 It turns out that in some environments, the limit is already over 1000 and
5775 that lowering it causes trouble. So now Exim takes care not to decrease it.
5777 40. When delivering a message, the value of $return_path is set to $sender_
5778 address at the start of routing (routers may change the value). By an
5779 oversight, this default was not being set up when an address was tested by
5780 -bt or -bv, which affected the outcome if any router or filter referred to
5783 41. The idea of the "warn" ACL verb is that it adds a header or writes to the
5784 log only when "message" or "log_message" are set. However, if one of the
5785 conditions was an address verification, or a call to a nested ACL, the
5786 messages generated by the underlying test were being passed through. This
5787 no longer happens. The underlying message is available in $acl_verify_
5788 message for both "message" and "log_message" expansions, so it can be
5789 passed through if needed.
5791 42. Added RFC 2047 interpretation of header lines for $h_ expansions, with a
5792 new expansion $bh_ to give the encoded byte string without charset
5793 translation. Translation happens only if iconv() is available; HAVE_ICONV
5794 indicates this at build time. HEADERS_CHARSET gives the charset to
5795 translate to; headers_charset can change it in the configuration, and
5796 "headers charset" can change it in an individual filter file.
5798 43. Now that we have a default RFC 2047 charset (see above), the code in Exim
5799 that creates RFC 2047 encoded "words" labels them as that charset instead
5800 of always using iso-8859-1. The cases are (i) the explicit ${rfc2047:
5801 expansion operator; (ii) when Exim creates a From: line for a local
5802 message; (iii) when a header line is rewritten to include a "phrase" part.
5804 44. Nasty bug in exiqsumm: the regex to skip already-delivered addresses was
5805 buggy, causing it to skip the first lines of messages whose message ID
5806 ended in 'D'. This would not have bitten before Exim release 4.14, because
5807 message IDs were unlikely to end in 'D' before then. The effect was to have
5808 incorrect size information for certain domains.
5810 45. #include "config.h" was missing at the start of the crypt16.c module. This
5811 caused trouble on Tru64 (aka OSF1) systems, because HAVE_CRYPT16 was not
5814 46. If there was a timeout during a "random" callout check, Exim treated it as
5815 a failure of the random address, and carried on sending RSET and the real
5816 address. If the delay was just some slowness somewhere, the response to the
5817 original RCPT would be taken as a response to RSET and so on, causing
5818 mayhem of various kinds.
5820 47. Change 50 for 4.20 was a heap of junk. I don't know what I was thinking
5821 when I implemented it. It didn't allow for the fact that some option values
5822 may legitimatetly be negative (e.g. size_addition), and it didn't even do
5823 the right test for positive values.
5825 48. Domain names in DNS records are case-independent. Exim always looks them up
5826 in lower case. Some resolvers return domain names in exactly the case they
5827 appear in the zone file, that is, they may contain uppercase letters. Not
5828 all resolvers do this - some return always lower case. Exim was treating a
5829 change of case by a resolver as a change of domain, similar to a widening
5830 of a domain abbreviation. This triggered its re-routing code and so it was
5831 trying to route what was effectively the same domain again. This normally
5832 caused routing to fail (because the router wouldn't handle the domain
5833 twice). Now Exim checks for this case specially, and just changes the
5834 casing of the domain that it ultimately uses when it transmits the message
5837 49. Added Sieve (RFC 3028) support, courtesy of Michael Haardt's contributed
5840 50. If a filter generated a file delivery with a non-absolute name (possible if
5841 no home directory exists for the router), the forbid_file option was not
5844 51. Added '&' feature to dnslists, to provide bit mask matching in addition to
5845 the existing equality matching.
5847 52. Exim was using ints instead of ino_t variables in some places where it was
5848 dealing with inode numbers.
5850 53. If TMPDIR is defined in Local/Makefile (default in src/EDITME is
5851 TMPDIR="/tmp"), Exim checks for the presence of an environment variable
5852 called TMPDIR, and if it finds it is different, it changes its value.
5854 54. The smtp_printf() function is now made available to local_scan() so
5855 additional output lines can be written before returning. There is also an
5856 smtp_fflush() function to enable the detection of a dropped connection.
5857 The variables smtp_input and smtp_batched_input are exported to
5860 55. Changed the default runtime configuration: the message "Unknown user"
5861 has been removed from the ACL, and instead placed on the localuser router,
5862 using the cannot_route_message feature. This means that any verification
5863 failures that generate their own messages won't get overridden. Similarly,
5864 the "Unrouteable address" message that was in the ACL for unverifiable
5865 relay addresses has also been removed.
5867 56. Added hosts_avoid_esmtp to the smtp transport.
5869 57. The exicyclog script was not checking for the esoteric option
5870 CONFIGURE_FILE_USE_EUID in the Local/Makefile. It now does this, but it
5871 will work only if exicyclog is run under the appropriate euid.
5873 58. Following a discussion on the list, the rules by which Exim recognises line
5874 endings on incoming messages have been changed. The -dropcr and drop_cr
5875 options are now no-ops, retained only for backwards compatibility. The
5876 following line terminators are recognized: LF CRLF CR. However, special
5877 processing applies to CR:
5879 (i) The sequence CR . CR does *not* terminate an incoming SMTP message,
5880 nor a local message in the state where . is a terminator.
5882 (ii) If a bare CR is encountered in a header line, an extra space is added
5883 after the line terminator so as not to end the header. The reasoning
5884 behind this is that bare CRs in header lines are most likely either
5885 to be mistakes, or people trying to play silly games.
5887 59. The size of a message, as listed by "-bp" or in the Exim monitor window,
5888 was being incorrectly given as 18 bytes larger than it should have been.
5889 This is a VOB (very old bug).
5891 60. This may never have affected anything current, but just in case it has:
5892 When the local host is found other than at the start of a list of hosts,
5893 the local host, those with the same MX, and any that follow, are discarded.
5894 When the list in question was part of a longer list of hosts, the following
5895 hosts (not currently being processed) were also being discarded. This no
5896 longer happens. I'm not sure if this situation could ever has previously
5899 61. Added the "/MX" feature to lists of hosts in the manualroute and query
5902 62. Whenever Exim generates a new message, it now adds an Auto-Submitted:
5903 header. This is something that is recommended in a new Internet Draft, and
5904 is something that is documented as being done by Sendmail. There are two
5905 possible values. For messages generated by the autoreply transport, Exim
5908 Auto-Submitted: auto-replied
5910 whereas for all other generated messages (e.g. bounces) it adds
5912 Auto-Submitted: auto-generated
5914 63. The "personal" condition in filters now includes a test for the
5915 Auto-Submitted: header. If it contains the string "auto-" the message it
5916 not considered personal.
5918 64. Added rcpt_include_affixes as a generic transport option.
5920 65. Added queue_only_override (default true).
5922 66. Added the syslog_duplication option.
5924 67. If what should have been the first header line of a message consisted of
5925 a space followed by a colon, Exim was mis-interpreting it as a header line.
5926 It isn't of course - it is syntactically invalid and should therefore be
5927 treated as the start of the message body. The misbehaviour could have
5928 caused a number of strange effects, including loss of data in subsequent
5929 header lines, and spool format errors.
5931 68. Formerly, the AUTH parameter on a MAIL command was trusted only if the
5932 client host had authenticated. This control can now be exercised by an ACL
5933 for more flexibility.
5935 69. By default, callouts do not happen when testing with -bh. There is now a
5936 variant, -bhc, which does actually run the callout code, including
5937 consulting and updating the callout cache.
5939 70. Added support for saslauthd authentication, courtesy of Alexander
5942 71. If statvfs() failed on the spool or log directories while checking their
5943 size for availability, Exim confusingly gave the error "space shortage".
5944 Furthermore, in debugging mode it crashed with a floating point exception.
5945 These checks are done if check_{spool,log}_{space,inodes} are set, and when
5946 an SMTP message arrives with SIZE= on the MAIL command. As this is a really
5947 serious problem, Exim now writes to the main and panic logs when this
5948 happens, with details of the failure. It then refuses to accept the
5949 incoming message, giving the message "spool directory problem" or "log
5950 directory problem" with a 421 code for SMTP messages.
5952 72. When Exim is about to re-exec itself, it ensures that the file descriptors
5953 0, 1, and 2 exist, because some OS complain for execs without them (see
5954 ChangeLog 4.05/30). If necessary, Exim opens /dev/null to use for these
5955 descriptors. However, the code omitted to check that the open succeeded,
5956 causing mysterious errors if for some reason the permissions on /dev/null
5957 got screwed. Now Exim writes a message to the main and panic logs, and
5958 bombs out if it can't open /dev/null.
5960 73. Re-vamped the way daemon_smtp_port, local_interfaces, and -oX work and
5961 interact so that it is all more flexible. It is supposed to remain
5962 backwards compatible. Also added extra_local_interfaces.
5964 74. Invalid data sent to a SPA (NTLM) server authenticator could cause the code
5965 to bomb out with an assertion failure - to the client this appears as a
5966 connection drop. This problem occurs in the part of the code that was taken
5967 from the Samba project. Fortunately, the assertion is in a very simple
5968 function, so I have fixed this by reproducing the function inline in the
5969 one place where it is called, and arranging for authentication to fail
5970 instead of killing the process with assert().
5972 75. The SPA client code was not working when the server requested OEM rather
5973 than Unicode encoding.
5975 76. Added code to make require_files with a specific uid setting more usable in
5976 the case where statting the file as root fails - usually a non-root-mounted
5977 NFS file system. When this happens and the failure is EACCES, Exim now
5978 forks a subprocess and does the per-uid checking as the relevant uid.
5980 77. Added process_log_path.
5982 78. If log_file_path was not explicitly set, a setting of check_log_space or
5983 check_log_inodes was ignored.
5985 79. If a space check for the spool or log partitions fails, the incident is now
5986 logged. Of course, in the latter case the data may get lost...
5988 80. Added the %p formatting code to string_format() so that it can be used to
5989 print addresses in debug_print(). Adjusted all the address printing in the
5990 debugging in store.c to use %p rather than %d.
5992 81. There was a concern that a line of code in smtp_in.c could overflow a
5993 buffer if a HELO/EHLO command was given followed by 500 or so spaces. As
5994 initially expressed, the concern was not well-founded, because trailing
5995 spaces are removed early. However, if the trailing spaces were followed by
5996 a NULL, they did not get removed, so the overflow was possible. Two fixes
5999 (a) I re-wrote the offending code in a cleaner fashion.
6000 (b) If an incoming SMTP command contains a NULL character, it is rejected
6003 82. When Exim changes uid/gid to the Exim user at daemon start time, it now
6004 runs initgroups(), so that if the Exim user is in any additional groups,
6005 they will be used during message reception.
6011 The change log for 4.20 and earlier releases has been archived.
projects / exim.git / blob