1 Change log file for Exim from version 4.21
2 -------------------------------------------
7 TL/01 When running the test suite, the README says that variables such as
8 no_msglog_check are global and can be placed anywhere in a specific
9 test's script, however it was observed that placement needed to be near
10 the beginning for it to behave that way. Changed the runtest perl
11 script to read through the entire script once to detect and set these
12 variables, reset to the beginning of the script, and then run through
13 the script parsing/test process like normal.
15 TL/02 The BSD's have an arc4random API. One of the functions to induce
16 adding randomness was arc4random_stir(), but it has been removed in
17 OpenBSD 5.5. Detect this OpenBSD version and skip calling this
18 function when detected.
23 TL/01 Bugzilla 1506: Re-add a 'return NULL' to silence complaints from static
24 checkers that were complaining about end of non-void function with no
27 JH/01 Bug 1513: Fix parsing of quoted parameter values in MIME headers.
28 This was a regression intruduced in 4.83 by another bugfix.
30 JH/02 Fix broken compilation when EXPERIMENTAL_DSN is enabled.
32 TL/02 Bug 1509: Fix exipick for enhanced spoolfile specification used when
33 EXPERIMENTAL_DNS is enabled. Fix from Wolfgang Breyha.
39 TF/01 Correctly close the server side of TLS when forking for delivery.
41 When a message was received over SMTP with TLS, Exim failed to clear up
42 the incoming connection properly after forking off the child process to
43 deliver the message. In some situations the subsequent outgoing
44 delivery connection happened to have the same fd number as the incoming
45 connection previously had. Exim would try to use TLS and fail, logging
46 a "Bad file descriptor" error.
48 TF/02 Portability fix for building lookup modules on Solaris when the xpg4
49 utilities have not been installed.
51 JH/01 Fix memory-handling in use of acl as a conditional; avoid free of
52 temporary space as the ACL may create new global variables.
54 TL/01 LDAP support uses per connection or global context settings, depending
55 upon the detected version of the libraries at build time.
57 TL/02 Experimental Proxy Protocol support: allows a proxied SMTP connection
58 to extract and use the src ip:port in logging and expansions as if it
59 were a direct connection from the outside internet. PPv2 support was
60 updated based on HAProxy spec change in May 2014.
62 JH/02 Add ${listextract {number}{list}{success}{fail}}.
64 TL/03 Bugzilla 1433: Fix DMARC SEGV with specific From header contents.
65 Properly escape header and check for NULL return.
67 PP/01 Continue incomplete 4.82 PP/19 by fixing docs too: use dns_dnssec_ok
70 JH/03 Bugzilla 1157: support log_selector smtp_confirmation for lmtp.
72 TL/04 Add verify = header_names_ascii check to reject email with non-ASCII
73 characters in header names, implemented as a verify condition.
74 Contributed by Michael Fischer v. Mollard.
76 TL/05 Rename SPF condition results err_perm and err_temp to standardized
77 results permerror and temperror. Previous values are deprecated but
78 still accepted. In a future release, err_perm and err_temp will be
79 completely removed, which will be a backward incompatibility if the
80 ACL tests for either of these two old results. Patch contributed by
81 user bes-internal on the mailing list.
83 JH/04 Add ${utf8clean:} operator. Contributed by Alex Rau.
85 JH/05 Bugzilla 305: Log incoming-TLS details on rejects, subject to log
86 selectors, in both main and reject logs.
88 JH/06 Log outbound-TLS and port details, subject to log selectors, for a
91 JH/07 Add malware type "sock" for talking to simple daemon.
93 JH/08 Bugzilla 1371: Add tls_{,try_}verify_hosts to smtp transport.
95 JH/09 Bugzilla 1431: Support (with limitations) headers_add/headers_remove in
96 routers/transports under cutthrough routing.
98 JH/10 Bugzilla 1005: ACL "condition =" should accept values which are negative
99 numbers. Touch up "bool" conditional to keep the same definition.
101 TL/06 Remove duplicated language in spec file from 4.82 TL/16.
103 JH/11 Add dnsdb tlsa lookup. From Todd Lyons.
105 JH/12 Expand items in router/transport headers_add or headers_remove lists
106 individually rather than the list as a whole. Bug 1452.
108 Required for reasonable handling of multiple headers_ options when
109 they may be empty; requires that headers_remove items with embedded
110 colons must have them doubled (or the list-separator changed).
112 TL/07 Add new dmarc expansion variable $dmarc_domain_policy to directly
113 view the policy declared in the DMARC record. Currently, $dmarc_status
114 is a combined value of both the record presence and the result of the
117 JH/13 Fix handling of $tls_cipher et.al. in (non-verify) transport. Bug 1455.
119 JH/14 New options dnssec_request_domains, dnssec_require_domains on the
120 dnslookup router and the smtp transport (applying to the forward
123 TL/08 Bugzilla 1453: New LDAP "SERVERS=" option allows admin to override list
124 of ldap servers used for a specific lookup. Patch provided by Heiko
127 JH/18 New options dnssec_lax, dnssec_strict on dnsdb lookups.
128 New variable $lookup_dnssec_authenticated for observability.
130 TL/09 Bugzilla 609: Add -C option to exiqgrep, specify which exim.conf to use.
131 Patch submitted by Lars Timman.
133 JH/19 EXPERIMENTAL_OCSP support under GnuTLS. Bug 1459.
135 TL/10 Bugzilla 1454: New -oMm option to pass message reference to Exim.
136 Requires trusted mode and valid format message id, aborts otherwise.
137 Patch contributed by Heiko Schlichting.
139 JH/20 New expansion variables tls_(in,out)_(our,peer)cert, and expansion item
140 certextract with support for various fields. Bug 1358.
142 JH/21 Observability of OCSP via variables tls_(in,out)_ocsp. Stapling
143 is requested by default, modifiable by smtp transport option
146 JH/22 Expansion operators ${md5:string} and ${sha1:string} can now
147 operate on certificate variables to give certificate fingerprints
148 Also new ${sha256:cert_variable}.
150 JH/23 The PRDR feature is moved from being Experimental into the mainline.
152 TL/11 Bug 1119: fix memory allocation in string_printing2(). Patch from
153 Christian Aistleitner.
155 JH/24 The OCSP stapling feature is moved from Experimental into the mainline.
157 TL/12 Bug 1444: Fix improper \r\n sequence handling when writing spool
158 file. Patch from Wolfgang Breyha.
160 JH/25 Expand the coverage of the delivery $host and $host_address to
161 client authenticators run in verify callout. Bug 1476.
163 JH/26 Port service names are now accepted for tls_on_connect_ports, to
164 align with daemon_smtp_ports. Bug 72.
166 TF/03 Fix udpsend. The ip_connectedsocket() function's socket type
167 support and error reporting did not work properly.
169 TL/13 Bug 1495: Exiqgrep check if -C config file specified on cli exists
170 and is readable. Patch from Andrew Colin Kissa.
172 TL/14 Enhance documentation of ${run expansion and how it parses the
173 commandline after expansion, particularly in the case when an
174 unquoted variable expansion results in an empty value.
176 JH/27 The TLS SNI feature was broken in 4.82. Fix it.
178 PP/02 Fix internal collision of T_APL on systems which support RFC3123
179 by renaming away from it. Addresses GH issue 15, reported by
182 JH/28 Fix parsing of MIME headers for parameters with quoted semicolons.
184 TL/15 SECURITY: prevent double expansion in math comparison functions
185 (can expand unsanitized data). Not remotely exploitable.
192 PP/01 Add -bI: framework, and -bI:sieve for querying sieve capabilities.
194 PP/02 Make -n do something, by making it not do something.
195 When combined with -bP, the name of an option is not output.
197 PP/03 Added tls_dh_min_bits SMTP transport driver option, only honoured
200 PP/04 First step towards DNSSEC, provide $sender_host_dnssec for
201 $sender_host_name and config options to manage this, and basic check
204 PP/05 DSCP support for outbound connections and control modifier for inbound.
206 PP/06 Cyrus SASL: set local and remote IP;port properties for driver.
207 (Only plugin which currently uses this is kerberos4, which nobody should
208 be using, but we should make it available and other future plugins might
209 conceivably use it, even though it would break NAT; stuff *should* be
210 using channel bindings instead).
212 PP/07 Handle "exim -L <tag>" to indicate to use syslog with tag as the process
213 name; added for Sendmail compatibility; requires admin caller.
214 Handle -G as equivalent to "control = suppress_local_fixups" (we used to
215 just ignore it); requires trusted caller.
216 Also parse but ignore: -Ac -Am -X<logfile>
219 TL/01 Bugzilla 1258 - Refactor MAIL FROM optional args processing.
221 TL/02 Add +smtp_confirmation as a default logging option.
223 TL/03 Bugzilla 198 - Implement remove_header ACL modifier.
224 Patch by Magnus Holmgren from 2007-02-20.
226 TL/04 Bugzilla 1281 - Spec typo.
227 Bugzilla 1283 - Spec typo.
228 Bugzilla 1290 - Spec grammar fixes.
230 TL/05 Bugzilla 1285 - Spec omission, fix docbook errors for spec.txt creation.
232 TL/06 Add Experimental DMARC support using libopendmarc libraries.
234 TL/07 Fix an out of order global option causing a segfault. Reported to dev
235 mailing list by by Dmitry Isaikin.
237 JH/01 Bugzilla 1201 & 304 - New cutthrough-delivery feature, with TLS support.
239 JH/02 Support "G" suffix to numbers in ${if comparisons.
241 PP/08 Handle smtp transport tls_sni option forced-fail for OpenSSL.
243 NM/01 Bugzilla 1197 - Spec typo
244 Bugzilla 1196 - Spec examples corrections
246 JH/03 Add expansion operators ${listnamed:name} and ${listcount:string}
248 PP/09 Add gnutls_allow_auto_pkcs11 option (was originally called
249 gnutls_enable_pkcs11, but renamed to more accurately indicate its
252 PP/10 Let Linux makefile inherit CFLAGS/CFLAGS_DYNAMIC.
253 Pulled from Debian 30_dontoverridecflags.dpatch by Andreas Metzler.
255 JH/04 Add expansion item ${acl {name}{arg}...}, expansion condition
256 "acl {{name}{arg}...}", and optional args on acl condition
259 JH/05 Permit multiple router/transport headers_add/remove lines.
261 JH/06 Add dnsdb pseudo-lookup "a+" to do an "aaaa" + "a" combination.
263 JH/07 Avoid using a waiting database for a single-message-only transport.
264 Performance patch from Paul Fisher. Bugzilla 1262.
266 JH/08 Strip leading/trailing newlines from add_header ACL modifier data.
269 JH/09 Add $headers_added variable, with content from use of ACL modifier
270 add_header (but not yet added to the message). Bugzilla 199.
272 JH/10 Add 8bitmime log_selector, for 8bitmime status on the received line.
273 Pulled from Bugzilla 817 by Wolfgang Breyha.
275 PP/11 SECURITY: protect DKIM DNS decoding from remote exploit.
277 (nb: this is the same fix as in Exim 4.80.1)
279 JH/11 Add A= logging on delivery lines, and a client_set_id option on
282 JH/12 Add optional authenticated_sender logging to A= and a log_selector
285 PP/12 Unbreak server_set_id for NTLM/SPA auth, broken by 4.80 PP/29.
287 PP/13 Dovecot auth: log better reason to rejectlog if Dovecot did not
288 advertise SMTP AUTH mechanism to us, instead of a generic
289 protocol violation error. Also, make Exim more robust to bad
290 data from the Dovecot auth socket.
292 TF/01 Fix ultimate retry timeouts for intermittently deliverable recipients.
294 When a queue runner is handling a message, Exim first routes the
295 recipient addresses, during which it prunes them based on the retry
296 hints database. After that it attempts to deliver the message to
297 any remaining recipients. It then updates the hints database using
300 So if a recipient address works intermittently, it can get repeatedly
301 deferred at routing time. The retry hints record remains fresh so the
302 address never reaches the final cutoff time.
304 This is a fairly common occurrence when a user is bumping up against
305 their storage quota. Exim had some logic in its local delivery code
306 to deal with this. However it did not apply to per-recipient defers
307 in remote deliveries, e.g. over LMTP to a separate IMAP message store.
309 This change adds a proper retry rule check during routing so that the
310 final cutoff time is checked against the message's age. We only do
311 this check if there is an address retry record and there is not a
312 domain retry record; this implies that previous attempts to handle
313 the address had the retry_use_local_parts option turned on. We use
314 this as an approximation for the destination being like a local
315 delivery, as in LMTP.
317 I suspect this new check makes the old local delivery cutoff check
318 redundant, but I have not verified this so I left the code in place.
320 TF/02 Correct gecos expansion when From: is a prefix of the username.
322 Test 0254 submits a message to Exim with the header
326 When I ran the test suite under the user fanf2, Exim expanded
327 the header to contain my full name, whereas it should have added
328 a Resent-Sender: header. It erroneously treats any prefix of the
329 username as equal to the username.
331 This change corrects that bug.
333 GF/01 DCC debug and logging tidyup
334 Error conditions log to paniclog rather than rejectlog.
335 Debug lines prefixed by "DCC: " to remove any ambiguity.
337 TF/03 Avoid unnecessary rebuilds of lookup-related code.
339 PP/14 Fix OCSP reinitialisation in SNI handling for Exim/TLS as server.
340 Bug spotted by Jeremy Harris; was flawed since initial commit.
341 Would have resulted in OCSP responses post-SNI triggering an Exim
342 NULL dereference and crash.
344 JH/13 Add $router_name and $transport_name variables. Bugzilla 308.
346 PP/15 Define SIOCGIFCONF_GIVES_ADDR for GNU Hurd.
347 Bug detection, analysis and fix by Samuel Thibault.
348 Bugzilla 1331, Debian bug #698092.
350 SC/01 Update eximstats to watch out for senders sending 'HELO [IpAddr]'
352 JH/14 SMTP PRDR (http://www.eric-a-hall.com/specs/draft-hall-prdr-00.txt).
353 Server implementation by Todd Lyons, client by JH.
354 Only enabled when compiled with EXPERIMENTAL_PRDR. A new
355 config variable "prdr_enable" controls whether the server
356 advertises the facility. If the client requests PRDR a new
357 acl_data_smtp_prdr ACL is called once for each recipient, after
358 the body content is received and before the acl_smtp_data ACL.
359 The client is controlled by bolth of: a hosts_try_prdr option
360 on the smtp transport, and the server advertisement.
361 Default client logging of deliveries and rejections involving
362 PRDR are flagged with the string "PRDR".
364 PP/16 Fix problems caused by timeouts during quit ACLs trying to double
365 fclose(). Diagnosis by Todd Lyons.
367 PP/17 Update configure.default to handle IPv6 localhost better.
368 Patch by Alain Williams (plus minor tweaks).
371 PP/18 OpenSSL made graceful with empty tls_verify_certificates setting.
372 This is now consistent with GnuTLS, and is now documented: the
373 previous undocumented portable approach to treating the option as
374 unset was to force an expansion failure. That still works, and
375 an empty string is now equivalent.
377 PP/19 Renamed DNSSEC-enabling option to "dns_dnssec_ok", to make it
378 clearer that Exim is using the DO (DNSSEC OK) EDNS0 resolver flag,
379 not performing validation itself.
381 PP/20 Added force_command boolean option to pipe transport.
382 Patch from Nick Koston, of cPanel Inc.
384 JH/15 AUTH support on callouts (and hence cutthrough-deliveries).
387 TF/04 Added udpsend ACL modifer and hexquote expansion operator
389 PP/21 Fix eximon continuous updating with timestamped log-files.
390 Broken in a format-string cleanup in 4.80, missed when I repaired the
391 other false fix of the same issue.
392 Report and fix from Heiko Schlichting.
395 PP/22 Guard LDAP TLS usage against Solaris LDAP variant.
396 Report from Prashanth Katuri.
398 PP/23 Support safari_ecdhe_ecdsa_bug for openssl_options.
399 It's SecureTransport, so affects any MacOS clients which use the
400 system-integrated TLS libraries, including email clients.
402 PP/24 Fix segfault from trying to fprintf() to a NULL stdio FILE* if
403 using a MIME ACL for non-SMTP local injection.
404 Report and assistance in diagnosis by Warren Baker.
406 TL/08 Adjust exiqgrep to be case-insensitive for sender/receiver.
408 JH/16 Fix comparisons for 64b. Bugzilla 1385.
410 TL/09 Add expansion variable $authenticated_fail_id to keep track of
411 last id that failed so it may be referenced in subsequent ACL's.
413 TL/10 Bugzilla 1375 - Prevent TLS rebinding in ldap. Patch provided by
416 TL/11 Bugzilla 1382 - Option ldap_require_cert overrides start_tls
417 ldap library initialization, allowing self-signed CA's to be
418 used. Also properly sets require_cert option later in code by
419 using NULL (global ldap config) instead of ldap handle (per
420 session). Bug diagnosis and testing by alxgomz.
422 TL/12 Enhanced documentation in the ratelimit.pl script provided in
423 the src/util/ subdirectory.
425 TL/13 Bug 1031 - Imported transport SQL logging patch from Axel Rau
426 renamed to Transport Post Delivery Action by Jeremy Harris, as
429 TL/14 Bugzilla 1217 - Redis lookup support has been added. It is only enabled
430 when Exim is compiled with EXPERIMENTAL_REDIS. A new config variable
431 redis_servers = needs to be configured which will be used by the redis
432 lookup. Patch from Warren Baker, of The Packet Hub.
434 TL/15 Fix exiqsumm summary for corner case. Patch provided by Richard Hall.
436 TL/16 Bugzilla 1289 - Clarify host/ip processing when have errors looking up a
437 hostname or reverse DNS when processing a host list. Used suggestions
438 from multiple comments on this bug.
440 TL/17 Bugzilla 1057 - Multiple clamd TCP targets patch from Mark Zealey.
442 TL/18 Had previously added a -CONTINUE option to runtest in the test suite.
443 Missed a few lines, added it to make the runtest require no keyboard
446 TL/19 Bugzilla 1402 - Test 533 fails if any part of the path to the test suite
447 contains upper case chars. Make router use caseful_local_part.
449 TL/20 Bugzilla 1400 - Add AVOID_GNUTLS_PKCS11 build option. Allows GnuTLS
450 support when GnuTLS has been built with p11-kit.
456 PP/01 SECURITY: protect DKIM DNS decoding from remote exploit.
458 This, or similar/improved, will also be change PP/11 of 4.82.
464 PP/01 Handle short writes when writing local log-files.
465 In practice, only affects FreeBSD (8 onwards).
466 Bugzilla 1053, with thanks to Dmitry Isaikin.
468 NM/01 Bugzilla 949 - Documentation tweak
470 NM/02 Bugzilla 1093 - eximstats DATA reject detection regexps
473 NM/03 Bugzilla 1169 - primary_hostname spelling was incorrect in docs.
475 PP/02 Implemented gsasl authenticator.
477 PP/03 Implemented heimdal_gssapi authenticator with "server_keytab" option.
479 PP/04 Local/Makefile support for (AUTH|LOOKUP)_*_PC=foo to use
480 `pkg-config foo` for cflags/libs.
482 PP/05 Swapped $auth1/$auth2 for gsasl GSSAPI mechanism, to be more consistent
483 with rest of GSASL and with heimdal_gssapi.
485 PP/06 Local/Makefile support for USE_(GNUTLS|OPENSSL)_PC=foo to use
486 `pkg-config foo` for cflags/libs for the TLS implementation.
488 PP/07 New expansion variable $tls_bits; Cyrus SASL server connection
489 properties get this fed in as external SSF. A number of robustness
490 and debugging improvements to the cyrus_sasl authenticator.
492 PP/08 cyrus_sasl server now expands the server_realm option.
494 PP/09 Bugzilla 1214 - Log authentication information in reject log.
495 Patch by Jeremy Harris.
497 PP/10 Added dbmjz lookup type.
499 PP/11 Let heimdal_gssapi authenticator take a SASL message without an authzid.
501 PP/12 MAIL args handles TAB as well as SP, for better interop with
502 non-compliant senders.
503 Analysis and variant patch by Todd Lyons.
505 NM/04 Bugzilla 1237 - fix cases where printf format usage not indicated
506 Bug report from Lars Müller <lars@samba.org> (via SUSE),
507 Patch from Dirk Mueller <dmueller@suse.com>
509 PP/13 tls_peerdn now print-escaped for spool files.
510 Observed some $tls_peerdn in wild which contained \n, which resulted
511 in spool file corruption.
513 PP/14 TLS fixes for OpenSSL: support TLS 1.1 & 1.2; new "openssl_options"
514 values; set SSL_MODE_AUTO_RETRY so that OpenSSL will retry a read
515 or write after TLS renegotiation, which otherwise led to messages
518 TK/01 Bugzilla 1239 - fix DKIM verification when signature was not inserted
519 as a tracking header (ie: a signed header comes before the signature).
520 Patch from Wolfgang Breyha.
522 JH/01 Bugzilla 660 - Multi-valued attributes from ldap now parseable as a
523 comma-sep list; embedded commas doubled.
525 JH/02 Refactored ACL "verify =" logic to table-driven dispatch.
527 PP/15 LDAP: Check for errors of TLS initialisation, to give correct
529 Report and patch from Dmitry Banschikov.
531 PP/16 Removed "dont_insert_empty_fragments" fron "openssl_options".
532 Removed SSL_clear() after SSL_new() which led to protocol negotiation
533 failures. We appear to now support TLS1.1+ with Exim.
535 PP/17 OpenSSL: new expansion var $tls_sni, which if used in tls_certificate
536 lets Exim select keys and certificates based upon TLS SNI from client.
537 Also option tls_sni on SMTP Transports. Also clear $tls_bits correctly
538 before an outbound SMTP session. New log_selector, +tls_sni.
540 PP/18 Bugzilla 1122 - check localhost_number expansion for failure, avoid
541 NULL dereference. Report and patch from Alun Jones.
543 PP/19 DNS resolver init changes for NetBSD compatibility. (Risk of breakage
544 on less well tested platforms). Obviates NetBSD pkgsrc patch-ac.
545 Not seeing resolver debug output on NetBSD, but suspect this is a
546 resolver implementation change.
548 PP/20 Revert part of NM/04, it broke log_path containing %D expansions.
549 Left warnings. Added "eximon gdb" invocation mode.
551 PP/21 Defaulting "accept_8bitmime" to true, not false.
553 PP/22 Added -bw for inetd wait mode support.
555 PP/23 Added PCRE_CONFIG=yes support to Makefile for using pcre-config to
556 locate the relevant includes and libraries. Made this the default.
558 PP/24 Fixed headers_only on smtp transports (was not sending trailing dot).
559 Bugzilla 1246, report and most of solution from Tomasz Kusy.
561 JH/03 ${eval } now uses 64-bit and supports a "g" suffix (like to "k" and "m").
562 This may cause build issues on older platforms.
564 PP/25 Revamped GnuTLS support, passing tls_require_ciphers to
565 gnutls_priority_init, ignoring Exim options gnutls_require_kx,
566 gnutls_require_mac & gnutls_require_protocols (no longer supported).
567 Added SNI support via GnuTLS too.
568 Made ${randint:..} supplier available, if using not-too-old GnuTLS.
570 PP/26 Added EXPERIMENTAL_OCSP for OpenSSL.
572 PP/27 Applied dnsdb SPF support patch from Janne Snabb.
573 Applied second patch from Janne, implementing suggestion to default
574 multiple-strings-in-record handling to match SPF spec.
576 JH/04 Added expansion variable $tod_epoch_l for a higher-precision time.
578 PP/28 Fix DCC dcc_header content corruption (stack memory referenced,
579 read-only, out of scope).
580 Patch from Wolfgang Breyha, report from Stuart Northfield.
582 PP/29 Fix three issues highlighted by clang analyser static analysis.
583 Only crash-plausible issue would require the Cambridge-specific
584 iplookup router and a misconfiguration.
585 Report from Marcin Mirosław.
587 PP/30 Another attempt to deal with PCRE_PRERELEASE, this one less buggy.
589 PP/31 %D in printf continues to cause issues (-Wformat=security), so for
590 now guard some of the printf checks behind WANT_DEEPER_PRINTF_CHECKS.
591 As part of this, removing so much warning spew let me fix some minor
592 real issues in debug logging.
594 PP/32 GnuTLS was always using default tls_require_ciphers, due to a missing
595 assignment on my part. Fixed.
597 PP/33 Added tls_dh_max_bits option, defaulting to current hard-coded limit
598 of NSS, for GnuTLS/NSS interop. Problem root cause diagnosis by
599 Janne Snabb (who went above and beyond: thank you).
601 PP/34 Validate tls_require_ciphers on startup, since debugging an invalid
602 string otherwise requires a connection and a bunch more work and it's
603 relatively easy to get wrong. Should also expose TLS library linkage
606 PP/35 Pull in <features.h> on Linux, for some portability edge-cases of
607 64-bit ${eval} (JH/03).
609 PP/36 Define _GNU_SOURCE in exim.h; it's needed for some releases of
610 GNU libc to support some of the 64-bit stuff, should not lead to
611 conflicts. Defined before os.h is pulled in, so if a given platform
612 needs to override this, it can.
614 PP/37 Unbreak Cyrus SASL auth: SSF retrieval was incorrect, Exim thought
615 protection layer was required, which is not implemented.
616 Bugzilla 1254, patch from Wolfgang Breyha.
618 PP/38 Overhaul DH prime handling, supply RFC-specified DH primes as built
619 into Exim, default to IKE id 23 from RFC 5114 (2048 bit). Make
620 tls_dhparam take prime identifiers. Also unbreak combination of
621 OpenSSL+DH_params+TLSSNI.
623 PP/39 Disable SSLv2 by default in OpenSSL support.
629 PP/01 Solaris build fix for Oracle's LDAP libraries.
630 Bugzilla 1109, patch from Stephen Usher.
632 TF/01 HP/UX build fix: avoid arithmetic on a void pointer.
634 TK/01 DKIM Verification: Fix relaxed canon for empty headers w/o
637 TF/02 Fix a couple more cases where we did not log the error message
638 when unlink() failed. See also change 4.74-TF/03.
640 TF/03 Make the exiwhat support code safe for signals. Previously Exim might
641 lock up or crash if it happened to be inside a call to libc when it
642 got a SIGUSR1 from exiwhat.
644 The SIGUSR1 handler appends the current process status to the process
645 log which is later printed by exiwhat. It used to use the general
646 purpose logging code to do this, but several functions it calls are
647 not safe for signals.
649 The new output code in the SIGUSR1 handler is specific to the process
650 log, and simple enough that it's easy to inspect for signal safety.
651 Removing some special cases also simplifies the general logging code.
652 Removing the spurious timestamps from the process log simplifies
655 TF/04 Improved ratelimit ACL condition.
657 The /noupdate option has been deprecated in favour of /readonly which
658 has clearer semantics. The /leaky, /strict, and /readonly update modes
659 are mutually exclusive. The update mode is no longer included in the
660 database key; it just determines when the database is updated. (This
661 means that when you upgrde Exim will forget old rate measurements.)
663 Exim now checks that the per_* options are used with an update mode that
664 makes sense for the current ACL. For example, when Exim is processing a
665 message (e.g. acl_smtp_rcpt or acl_smtp_data, etc.) you can specify
666 per_mail/leaky or per_mail/strict; otherwise (e.g. in acl_smtp_helo) you
667 must specify per_mail/readonly. If you omit the update mode it defaults to
668 /leaky where that makes sense (as before) or /readonly where required.
670 The /noupdate option is now undocumented but still supported for
671 backwards compatibility. It is equivalent to /readonly except that in
672 ACLs where /readonly is required you may specify /leaky/noupdate or
673 /strict/noupdate which are treated the same as /readonly.
675 A useful new feature is the /count= option. This is a generalization
676 of the per_byte option, so that you can measure the throughput of other
677 aggregate values. For example, the per_byte option is now equivalent
678 to per_mail/count=${if >{0}{$message_size} {0} {$message_size} }.
680 The per_rcpt option has been generalized using the /count= mechanism
681 (though it's more complicated than the per_byte equivalence). When it is
682 used in acl_smtp_rcpt, the per_rcpt option adds recipients to the
683 measured rate one at a time; if it is used later (e.g. in acl_smtp_data)
684 or in a non-SMTP ACL it adds all the recipients in one go. (The latter
685 /count=$recipients_count behaviour used to work only in non-SMTP ACLs.)
686 Note that using per_rcpt with a non-readonly update mode in more than
687 one ACL will cause the recipients to be double-counted. (The per_mail
688 and per_byte options don't have this problem.)
690 The handling of very low rates has changed slightly. If the computed rate
691 is less than the event's count (usually one) then this event is the first
692 after a long gap. In this case the rate is set to the same as this event's
693 count, so that the first message of a spam run is counted properly.
695 The major new feature is a mechanism for counting the rate of unique
696 events. The new per_addr option counts the number of different
697 recipients that someone has sent messages to in the last time period. It
698 behaves like per_rcpt if all the recipient addresses are different, but
699 duplicate recipient addresses do not increase the measured rate. Like
700 the /count= option this is a general mechanism, so the per_addr option
701 is equivalent to per_rcpt/unique=$local_part@$domain. You can, for
702 example, measure the rate that a client uses different sender addresses
703 with the options per_mail/unique=$sender_address. There are further
704 details in the main documentation.
706 TF/05 Removed obsolete $Cambridge$ CVS revision strings.
708 TF/06 Removed a few PCRE remnants.
710 TF/07 Automatically extract Exim's version number from tags in the git
711 repository when doing development or release builds.
713 PP/02 Raise smtp_cmd_buffer_size to 16kB.
714 Bugzilla 879. Patch from Paul Fisher.
716 PP/03 Implement SSL-on-connect outbound with protocol=smtps on smtp transport.
717 Heavily based on revision 40f9a89a from Simon Arlott's tree.
720 PP/04 Use .dylib instead of .so for dynamic library loading on MacOS.
722 PP/05 Variable $av_failed, true if the AV scanner deferred.
723 Bugzilla 1078. Patch from John Horne.
725 PP/06 Stop make process more reliably on build failure.
726 Bugzilla 1087. Patch from Heiko Schlittermann.
728 PP/07 Make maildir_use_size_file an _expandable_ boolean.
729 Bugzilla 1089. Patch from Heiko Schlittermann.
731 PP/08 Handle ${run} returning more data than OS pipe buffer size.
732 Bugzilla 1131. Patch from Holger Weiß.
734 PP/09 Handle IPv6 addresses with SPF.
735 Bugzilla 860. Patch from Wolfgang Breyha.
737 PP/10 GnuTLS: support TLS 1.2 & 1.1.
739 Use gnutls_certificate_verify_peers2() [patch from Andreas Metzler].
742 PP/11 match_* no longer expand right-hand-side by default.
743 New compile-time build option, EXPAND_LISTMATCH_RHS.
744 New expansion conditions, "inlist", "inlisti".
746 PP/12 fix uninitialised greeting string from PP/03 (smtps client support).
748 PP/13 shell and compiler warnings fixes for RC1-RC4 changes.
750 PP/14 fix log_write() format string regression from TF/03.
751 Bugzilla 1152. Patch from Dmitry Isaikin.
757 PP/01 The new ldap_require_cert option would segfault if used. Fixed.
759 PP/02 Harmonised TLS library version reporting; only show if debugging.
760 Layout now matches that introduced for other libraries in 4.74 PP/03.
762 PP/03 New openssl_options items: no_sslv2 no_sslv3 no_ticket no_tlsv1
764 PP/04 New "dns_use_edns0" global option.
766 PP/05 Don't segfault on misconfiguration of ref:name exim-user as uid.
769 PP/06 Extra paranoia around buffer usage at the STARTTLS transition.
770 nb: Exim is not vulnerable to http://www.kb.cert.org/vuls/id/555316
772 TK/01 Updated PolarSSL code to 0.14.2.
773 Bugzilla 1097. Patch from Andreas Metzler.
775 PP/07 Catch divide-by-zero in ${eval:...}.
778 PP/08 Condition negation of bool{}/bool_lax{} did not negate. Fixed.
781 TK/02 Bugzilla 1106: CVE-2011-1764 - DKIM log line was subject to a
782 format-string attack -- SECURITY: remote arbitrary code execution.
784 TK/03 SECURITY - DKIM signature header parsing was double-expanded, second
785 time unintentionally subject to list matching rules, letting the header
786 cause arbitrary Exim lookups (of items which can occur in lists, *not*
787 arbitrary string expansion). This allowed for information disclosure.
789 PP/09 Fix another SIGFPE (x86) in ${eval:...} expansion, this time related to
790 INT_MIN/-1 -- value coerced to INT_MAX.
796 NM/01 Workround for PCRE version dependency in version reporting
799 TF/01 Update valgrind.h and memcheck.h to copies from valgrind-3.6.0.
800 This fixes portability to compilers other than gcc, notably
801 Solaris CC and HP-UX CC. Fixes Bugzilla 1050.
803 TF/02 Bugzilla 139: Avoid using the += operator in the modular lookup
804 makefiles for portability to HP-UX and POSIX correctness.
806 PP/01 Permit LOOKUP_foo enabling on the make command-line.
807 Also via indented variable definition in the Makefile.
808 (Debugging by Oliver Heesakkers).
810 PP/02 Restore caching of spamd results with expanded spamd_address.
811 Patch from author of expandable spamd_address patch, Wolfgang Breyha.
813 PP/03 Build issue: lookups-Makefile now exports LC_ALL=C
814 Improves build reliability. Fix from: Frank Elsner
816 NM/02 Fix wide character breakage in the rfc2047 coding
817 Fixes bug 1064. Patch from Andrey N. Oktyabrski
819 NM/03 Allow underscore in dnslist lookups
820 Fixes bug 1026. Patch from Graeme Fowler
822 PP/04 Bugzilla 230: Support TLS-enabled LDAP (in addition to ldaps).
823 Code patches from Adam Ciarcinski of NetBSD.
825 NM/04 Fixed exiqgrep to cope with mailq missing size issue
828 PP/05 Bugzilla 1083: when lookup expansion defers, escape the output which
829 is logged, to avoid truncation. Patch from John Horne.
831 PP/06 Bugzilla 1042: implement freeze_signal on pipe transports.
832 Patch from Jakob Hirsch.
834 PP/07 Bugzilla 1061: restrict error messages sent over SMTP to not reveal
835 SQL string expansion failure details.
836 Patch from Andrey Oktyabrski.
838 PP/08 Bugzilla 486: implement %M datestamping in log filenames.
839 Patch from Simon Arlott.
841 PP/09 New lookups functionality failed to compile on old gcc which rejects
842 extern declarations in function scope.
843 Patch from Oliver Fleischmann
845 PP/10 Use sig_atomic_t for flags set from signal handlers.
846 Check getgroups() return and improve debugging.
847 Fixed developed for diagnosis in bug 927 (which turned out to be
850 PP/11 Bugzilla 1055: Update $message_linecount for maildir_tag.
851 Patch from Mark Zealey.
853 PP/12 Bugzilla 1056: Improved spamd server selection.
854 Patch from Mark Zealey.
856 PP/13 Bugzilla 1086: Deal with maildir quota file races.
857 Based on patch from Heiko Schlittermann.
859 PP/14 Bugzilla 1019: DKIM multiple signature generation fix.
860 Patch from Uwe Doering, sign-off by Michael Haardt.
862 NM/05 Fix to spam.c to accommodate older gcc versions which dislike
863 variable declaration deep within a block. Bug and patch from
866 PP/15 lookups-Makefile IRIX compatibilty coercion.
868 PP/16 Make DISABLE_DKIM build knob functional.
870 NM/06 Bugzilla 968: child_open_uid: restore default SIGPIPE handler
871 Patch by Simon Arlott
873 TF/03 Fix valgrind.h portability to C89 compilers that do not support
874 variable argument macros. Our copy now differs from upstream.
880 TF/01 Failure to get a lock on a hints database can have serious
881 consequences so log it to the panic log.
883 TF/02 Log LMTP confirmation messages in the same way as SMTP,
884 controlled using the smtp_confirmation log selector.
886 TF/03 Include the error message when we fail to unlink a spool file.
888 DW/01 Bugzilla 139: Support dynamically loaded lookups as modules.
889 With thanks to Steve Haslam, Johannes Berg & Serge Demonchaux
890 for maintaining out-of-tree patches for some time.
892 PP/01 Bugzilla 139: Documentation and portability issues.
893 Avoid GNU Makefile-isms, let Exim continue to build on BSD.
894 Handle per-OS dynamic-module compilation flags.
896 PP/02 Let /dev/null have normal permissions.
897 The 4.73 fixes were a little too stringent and complained about the
898 permissions on /dev/null. Exempt it from some checks.
899 Reported by Andreas M. Kirchwitz.
901 PP/03 Report version information for many libraries, including
902 Exim version information for dynamically loaded libraries. Created
903 version.h, now support a version extension string for distributors
904 who patch heavily. Dynamic module ABI change.
906 PP/04 CVE-2011-0017 - check return value of setuid/setgid. This is a
907 privilege escalation vulnerability whereby the Exim run-time user
908 can cause root to append content of the attacker's choosing to
911 PP/05 Bugzilla 1041: merged DCC maintainer's fixes for return code.
914 PP/06 Bugzilla 1071: fix delivery logging with untrusted macros.
915 If dropping privileges for untrusted macros, we disabled normal logging
916 on the basis that it would fail; for the Exim run-time user, this is not
917 the case, and it resulted in successful deliveries going unlogged.
918 Fixed. Reported by Andreas Metzler.
924 PP/01 Date: & Message-Id: revert to normally being appended to a message,
925 only prepend for the Resent-* case. Fixes regression introduced in
926 Exim 4.70 by NM/22 for Bugzilla 607.
928 PP/02 Include check_rfc2047_length in configure.default because we're seeing
929 increasing numbers of administrators be bitten by this.
931 JJ/01 Added DISABLE_DKIM and comment to src/EDITME
933 PP/03 Bugzilla 994: added openssl_options main configuration option.
935 PP/04 Bugzilla 995: provide better SSL diagnostics on failed reads.
937 PP/05 Bugzilla 834: provide a permit_coredump option for pipe transports.
939 PP/06 Adjust NTLM authentication to handle SASL Initial Response.
941 PP/07 If TLS negotiated an anonymous cipher, we could end up with SSL but
942 without a peer certificate, leading to a segfault because of an
943 assumption that peers always have certificates. Be a little more
944 paranoid. Problem reported by Martin Tscholak.
946 PP/08 Bugzilla 926: switch ClamAV to use the new zINSTREAM API for content
947 filtering; old API available if built with WITH_OLD_CLAMAV_STREAM=yes
948 NB: ClamAV planning to remove STREAM in "middle of 2010".
949 CL also introduces -bmalware, various -d+acl logging additions and
950 more caution in buffer sizes.
952 PP/09 Implemented reverse_ip expansion operator.
954 PP/10 Bugzilla 937: provide a "debug" ACL control.
956 PP/11 Bugzilla 922: Documentation dusting, patch provided by John Horne.
958 PP/12 Bugzilla 973: Implement --version.
960 PP/13 Bugzilla 752: Refuse to build/run if Exim user is root/0.
962 PP/14 Build without WITH_CONTENT_SCAN. Path from Andreas Metzler.
964 PP/15 Bugzilla 816: support multiple condition rules on Routers.
966 PP/16 Add bool_lax{} expansion operator and use that for combining multiple
967 condition rules, instead of bool{}. Make both bool{} and bool_lax{}
968 ignore trailing whitespace.
970 JJ/02 prevent non-panic DKIM error from being sent to paniclog
972 JJ/03 added tcp_wrappers_daemon_name to allow host entries other than
975 PP/17 Fix malware regression for cmdline scanner introduced in PP/08.
976 Notification from Dr Andrew Aitchison.
978 PP/18 Change ClamAV response parsing to be more robust and to handle ClamAV's
979 ExtendedDetectionInfo response format.
980 Notification from John Horne.
982 PP/19 OpenSSL 1.0.0a compatibility const-ness change, should be backwards
985 PP/20 Added a CONTRIBUTING file. Fixed the documentation build to use http:
986 XSL and documented dependency on system catalogs, with examples of how
989 DW/21 Added Valgrind hooks in store.c to help it capture out-of-bounds store
992 DW/22 Bugzilla 1044: CVE-2010-4345 - partial fix: restrict default behaviour
993 of CONFIGURE_OWNER and CONFIGURE_GROUP options to no longer allow a
994 configuration file which is writeable by the Exim user or group.
996 DW/23 Bugzilla 1044: CVE-2010-4345 - part two: extend checks for writeability
997 of configuration files to cover files specified with the -C option if
998 they are going to be used with root privileges, not just the default
1001 DW/24 Bugzilla 1044: CVE-2010-4345 - part three: remove ALT_CONFIG_ROOT_ONLY
1002 option (effectively making it always true).
1004 DW/25 Add TRUSTED_CONFIG_PREFIX_FILE option to allow alternative configuration
1005 files to be used while preserving root privileges.
1007 DW/26 Set FD_CLOEXEC on SMTP sockets after forking in the daemon, to ensure
1008 that rogue child processes cannot use them.
1010 PP/27 Bugzilla 1047: change the default for system_filter_user to be the Exim
1011 run-time user, instead of root.
1013 PP/28 Add WHITELIST_D_MACROS option to let some macros be overridden by the
1014 Exim run-time user without dropping privileges.
1016 DW/29 Remove use of va_copy() which breaks pre-C99 systems. Duplicate the
1017 result string, instead of calling string_vformat() twice with the same
1020 DW/30 Allow TRUSTED_CONFIG_PREFIX_FILE only for Exim or CONFIGURE_OWNER, not
1021 for other users. Others should always drop root privileges if they use
1022 -C on the command line, even for a whitelisted configure file.
1024 DW/31 Turn TRUSTED_CONFIG_PREFIX_FILE into TRUSTED_CONFIG_FILE. No prefixes.
1026 NM/01 Fixed bug #1002 - Message loss when using multiple deliveries
1032 JJ/01 installed exipick 20100104.1, adding $max_received_linelength,
1033 $data_path, and $header_path variables; fixed documentation bugs and
1036 JJ/02 installed exipick 20100222.0, added --input-dir and --finput to allow
1037 exipick to access non-standard spools, including the "frozen" queue
1040 NM/01 Bugzilla 965: Support mysql stored procedures.
1041 Patch from Alain Williams
1043 NM/02 Bugzilla 961: Spacing fix (syntax error) on Makefile directives for NetBSD
1045 NM/03 Bugzilla 955: Documentation fix for max_rcpts.
1046 Patch from Andreas Metzler
1048 NM/04 Bugzilla 954: Fix for unknown responses from Dovecot authenticator.
1049 Patch from Kirill Miazine
1051 NM/05 Bugzilla 671: Added umask to procmail example.
1053 JJ/03 installed exipick 20100323.0, fixing doc bug
1055 NM/06 Bugzilla 988: CVE-2010-2023 - prevent hardlink attack on sticky mail
1056 directory. Notification and patch from Dan Rosenberg.
1058 TK/01 PDKIM: Upgrade PolarSSL files to upstream version 0.12.1.
1060 TK/02 Improve log output when DKIM signing operation fails.
1062 MH/01 Treat the transport option dkim_domain as a colon separated
1063 list, not as a single string, and sign the message with each element,
1064 omitting multiple occurences of the same signer.
1066 NM/07 Null terminate DKIM strings, Null initialise DKIM variable
1067 Bugzilla 985, 986. Patch by Simon Arlott
1069 NM/08 Bugzilla 967. dnsdb DNS TXT record bug fix (DKIM-related)
1070 Patch by Simon Arlott
1072 PP/01 Bugzilla 989: CVE-2010-2024 - work round race condition on
1073 MBX locking. Notification from Dan Rosenberg.
1079 TK/01 Bugzilla 912: Fix DKIM segfault on empty headers/body.
1081 NM/01 Bugzilla 913: Documentation fix for gnutls_* options.
1083 NM/02 Bugzilla 722: Documentation for randint. Better randomness defaults.
1085 NM/03 Bugzilla 847: Enable DNSDB lookup by default.
1087 NM/04 Bugzilla 915: Flag broken perl installation during build.
1093 TK/01 Added patch by Johannes Berg that expands the main option
1094 "spamd_address" if it starts with a dollar sign.
1096 TK/02 Write list of recipients to X-Envelope-Sender header when building
1097 the mbox-format spool file for content scanning (suggested by Jakob
1100 TK/03 Added patch by Wolfgang Breyha that adds experimental DCC
1101 (http://www.dcc-servers.net/) support via dccifd. Activated by
1102 setting EXPERIMENTAL_DCC=yes in Local/Makefile.
1104 TK/04 Bugzilla 673: Add f-protd malware scanner support. Patch submitted
1105 by Mark Daniel Reidel <mr@df.eu>.
1107 NM/01 Bugzilla 657: Embedded PCRE removed from the exim source tree.
1108 When building exim an external PCRE library is now needed -
1109 PCRE is a system library on the majority of modern systems.
1110 See entry on PCRE_LIBS in EDITME file.
1112 NM/02 Bugzilla 646: Removed unwanted C/R in Dovecot authenticator
1113 conversation. Added nologin parameter to request.
1114 Patch contributed by Kirill Miazine.
1116 TF/01 Do not log submission mode rewrites if they do not change the address.
1118 TF/02 Bugzilla 662: Fix stack corruption before exec() in daemon.c.
1120 NM/03 Bugzilla 602: exicyclog now handles panic log, and creates empty
1121 log files in place. Contributed by Roberto Lima.
1123 NM/04 Bugzilla 667: Close socket used by dovecot authenticator.
1125 TF/03 Bugzilla 615: When checking the local_parts router precondition
1126 after a local_part_suffix or local_part_prefix option, Exim now
1127 does not use the address's named list lookup cache, since this
1128 contains cached lookups for the whole local part.
1130 NM/05 Bugzilla 521: Integrated SPF Best Guess support contributed by
1131 Robert Millan. Documentation is in experimental-spec.txt.
1133 TF/04 Bugzilla 668: Fix parallel build (make -j).
1135 NM/05.2 Bugzilla 437: Prevent Maildir aux files being created with mode 000.
1137 NM/05.3 Bugzilla 598: Improvement to Dovecot authenticator handling.
1138 Patch provided by Jan Srzednicki.
1140 TF/05 Leading white space used to be stripped from $spam_report which
1141 wrecked the formatting. Now it is preserved.
1143 TF/06 Save $spam_score, $spam_bar, and $spam_report in spool files, so
1144 that they are available at delivery time.
1146 TF/07 Fix the way ${extract is skipped in the untaken branch of a conditional.
1148 TF/08 TLS error reporting now respects the incoming_interface and
1149 incoming_port log selectors.
1151 TF/09 Produce a more useful error message if an SMTP transport's hosts
1152 setting expands to an empty string.
1154 NM/06 Bugzilla 744: EXPN did not work under TLS.
1155 Patch provided by Phil Pennock.
1157 NM/07 Bugzilla 769: Extraneous comma in usage fprintf
1158 Patch provided by Richard Godbee.
1160 NM/08 Fixed erroneous documentation references to smtp_notquit_acl to be
1161 acl_smtp_notquit, added index entry.
1163 NM/09 Bugzilla 787: Potential buffer overflow in string_format.
1164 Patch provided by Eugene Bujak.
1166 NM/10 Bugzilla 770: Problem on some platforms modifying the len parameter to
1167 accept(). Patch provided by Maxim Dounin.
1169 NM/11 Bugzilla 749: Preserve old behaviour of blanks comparing equal to zero.
1170 Patch provided by Phil Pennock.
1172 NM/12 Bugzilla 497: Correct behaviour of exiwhat when no config exists.
1174 NM/13 Bugzilla 590: Correct handling of Resent-Date headers.
1175 Patch provided by Brad "anomie" Jorsch.
1177 NM/14 Bugzilla 622: Added timeout setting to transport filter.
1178 Patch provided by Dean Brooks.
1180 TK/05 Add native DKIM support (does not depend on external libraries).
1182 NM/15 Bugzilla 854: Removed code that symlinks to pcre as its no longer useful.
1183 Patch provided by Graeme Fowler.
1185 NM/16 Bugzilla 851: Documentation example syntax fix.
1187 NM/17 Changed NOTICE file to remove references to embedded PCRE.
1189 NM/18 Bugzilla 894: Fix issue with very long lines including comments in
1192 NM/19 Bugzilla 745: TLS version reporting.
1193 Patch provided by Phil Pennock.
1195 NM/20 Bugzilla 167: bool: condition support.
1196 Patch provided by Phil Pennock.
1198 NM/21 Bugzilla 665: gnutls_compat_mode to allow compatibility with broken
1199 clients. Patch provided by Phil Pennock.
1201 NM/22 Bugzilla 607: prepend (not append) Resent-Message-ID and Resent-Date.
1202 Patch provided by Brad "anomie" Jorsch.
1204 NM/23 Bugzilla 687: Fix misparses in eximstats.
1205 Patch provided by Heiko Schlittermann.
1207 NM/24 Bugzilla 688: Fix exiwhat to handle log_selector = +pid.
1208 Patch provided by Heiko Schlittermann.
1210 NM/25 Bugzilla 727: Use transport mode as default mode for maildirsize file.
1211 plus update to original patch.
1213 NM/26 Bugzilla 799: Documentation correction for ratelimit.
1215 NM/27 Bugzilla 802: Improvements to local interface IP addr detection.
1216 Patch provided by David Brownlee.
1218 NM/28 Bugzilla 807: Improvements to LMTP delivery logging.
1220 NM/29 Bugzilla 862, 866, 875: Documentation bugfixes.
1222 NM/30 Bugzilla 888: TLS documentation bugfixes.
1224 NM/31 Bugzilla 896: Dovecot buffer overrun fix.
1226 NM/32 Bugzilla 889: Change all instances of "expr" in shell scripts to "expr --"
1227 Unlike the original bugzilla I have changed all shell scripts in src tree.
1229 NM/33 Bugzilla 898: Transport filter timeout fix.
1230 Patch by Todd Rinaldo.
1232 NM/34 Bugzilla 901: Fix sign/unsigned and UTF mismatches.
1233 Patch by Serge Demonchaux.
1235 NM/35 Bugzilla 39: Base64 decode bug fixes.
1236 Patch by Jakob Hirsch.
1238 NM/36 Bugzilla 909: Correct connect() call in dcc code.
1240 NM/37 Bugzilla 910: Correct issue with relaxed/simple handling.
1242 NM/38 Bugzilla 908: Removed NetBSD3 support as no longer needed.
1244 NM/39 Bugzilla 911: Fixed MakeLinks build script.
1250 TK/01 Add preliminary DKIM support. Currently requires a forked version of
1251 ALT-N's libdkim that I have put here:
1252 http://duncanthrax.net/exim-experimental/
1254 Note to Michael Haardt: I had to rename some vars in sieve.c. They
1255 were called 'true' and it seems that C99 defines that as a reserved
1256 keyword to be used with 'bool' variable types. That means you could
1257 not include C99-style headers which use bools without triggering
1258 build errors in sieve.c.
1260 NM/01 Bugzilla 592: --help option is handled incorrectly if exim is invoked
1261 as mailq or other aliases. Changed the --help handling significantly
1262 to do whats expected. exim_usage() emits usage/help information.
1264 SC/01 Added the -bylocaldomain option to eximstats.
1266 NM/02 Bugzilla 619: Defended against bad data coming back from gethostbyaddr.
1268 NM/03 Bugzilla 613: Documentation fix for acl_not_smtp.
1270 NM/04 Bugzilla 628: PCRE update to 7.4 (work done by John Hall).
1276 PH/01 Another patch from the Sieve maintainer.
1278 PH/02 When an IPv6 address is converted to a string for single-key lookup
1279 in an address list (e.g. for an item such as "net24-dbm;/net/works"),
1280 dots are used instead of colons so that keys in lsearch files need not
1281 contain colons. This was done some time before quoting was made available
1282 in lsearch files. However, iplsearch files do require colons in IPv6 keys
1283 (notated using the quote facility) so as to distinguish them from IPv4
1284 keys. This meant that lookups for IP addresses in host lists did not work
1285 for iplsearch lookups.
1287 This has been fixed by arranging for IPv6 addresses to be expressed with
1288 colons if the lookup type is iplsearch. This is not incompatible, because
1289 previously such lookups could never work.
1291 The situation is now rather anomolous, since one *can* have colons in
1292 ordinary lsearch keys. However, making the change in all cases is
1293 incompatible and would probably break a number of configurations.
1295 TK/01 Change PRVS address formatting scheme to reflect latests BATV draft
1298 MH/01 The "spam" ACL condition code contained a sscanf() call with a %s
1299 conversion specification without a maximum field width, thereby enabling
1300 a rogue spamd server to cause a buffer overflow. While nobody in their
1301 right mind would setup Exim to query an untrusted spamd server, an
1302 attacker that gains access to a server running spamd could potentially
1303 exploit this vulnerability to run arbitrary code as the Exim user.
1305 TK/02 Bugzilla 502: Apply patch to make the SPF-Received: header use
1306 $primary_hostname instead of what libspf2 thinks the hosts name is.
1308 MH/02 The dsearch lookup now uses lstat(2) instead of stat(2) to look for
1309 a directory entry by the name of the lookup key. Previously, if a
1310 symlink pointed to a non-existing file or a file in a directory that
1311 Exim lacked permissions to read, a lookup for a key matching that
1312 symlink would fail. Now it is enough that a matching directory entry
1313 exists, symlink or not. (Bugzilla 503.)
1315 PH/03 The body_linecount and body_zerocount variables are now exported in the
1318 PH/04 Added the $dnslist_matched variable.
1320 PH/05 Unset $tls_cipher and $tls_peerdn before making a connection as a client.
1321 This means they are set thereafter only if the connection becomes
1324 PH/06 Added the client_condition to authenticators so that some can be skipped
1325 by clients under certain conditions.
1327 PH/07 The error message for a badly-placed control=no_multiline_responses left
1328 "_responses" off the end of the name.
1330 PH/08 Added -Mvc to output a copy of a message in RFC 2822 format.
1332 PH/09 Tidied the code for creating ratelimiting keys, creating them explicitly
1333 (without spaces) instead of just copying the configuration text.
1335 PH/10 Added the /noupdate option to the ratelimit ACL condition.
1337 PH/11 Added $max_received_linelength.
1339 PH/12 Added +ignore_defer and +include_defer to host lists.
1341 PH/13 Installed PCRE version 7.2. This needed some changes because of the new
1342 way in which PCRE > 7.0 is built.
1344 PH/14 Implemented queue_only_load_latch.
1346 PH/15 Removed an incorrect (int) cast when reading the value of SIZE in a
1347 MAIL command. The effect was to mangle the value on 64-bit systems.
1349 PH/16 Another patch from the Sieve maintainer.
1351 PH/17 Added the NOTQUIT ACL, based on a patch from Ted Cooper.
1353 PH/18 If a system quota error occurred while trying to create the file for
1354 a maildir delivery, the message "Mailbox is full" was not appended to the
1355 bounce if the delivery eventually timed out. Change 4.67/27 below applied
1356 only to a quota excession during the actual writing of the file.
1358 PH/19 It seems that peer DN values may contain newlines (and other non-printing
1359 characters?) which causes problems in log lines. The DN values are now
1360 passed through string_printing() before being added to log lines.
1362 PH/20 Added the "servers=" facility to MySQL and PostgreSQL lookups. (Oracle
1363 and InterBase are left for another time.)
1365 PH/21 Added message_body_newlines option.
1367 PH/22 Guard against possible overflow in moan_check_errorcopy().
1369 PH/23 POSIX allows open() to be a macro; guard against that.
1371 PH/24 If the recipient of an error message contained an @ in the local part
1372 (suitably quoted, of course), incorrect values were put in $domain and
1373 $local_part during the evaluation of errors_copy.
1379 MH/01 Fix for bug #448, segfault in Dovecot authenticator when interface_address
1380 is unset (happens when testing with -bh and -oMi isn't used). Thanks to
1383 PH/01 Added a new log selector smtp_no_mail, to log SMTP sessions that do not
1384 issue a MAIL command.
1386 PH/02 In an ACL statement such as
1388 deny dnslists = X!=127.0.0.2 : X=127.0.0.2
1390 if a client was not listed at all, or was listed with a value other than
1391 127.0.0.2, in the X list, but was listed with 127.0.0.2 in the Y list,
1392 the condition was not true (as it should be), so access was not denied.
1393 The bug was that the ! inversion was incorrectly passed on to the second
1394 item. This has been fixed.
1396 PH/03 Added additional dnslists conditions == and =& which are different from
1397 = and & when the dns lookup returns more than one IP address.
1399 PH/04 Added gnutls_require_{kx,mac,protocols} to give more control over the
1400 cipher suites used by GnuTLS. These options are ignored by OpenSSL.
1402 PH/05 After discussion on the list, added a compile time option ENABLE_DISABLE_
1403 FSYNC, which compiles an option called disable_fsync that allows for
1404 bypassing fsync(). The documentation is heavily laced with warnings.
1406 SC/01 Updated eximstats to collate all SpamAssassin rejects into one bucket.
1408 PH/06 Some tidies to the infrastructure of the Test Suite that is concerned
1409 with the auxiliary C programs that it uses: (1) Arrange for BIND_8_COMPAT
1410 to be defined when compiling on OSX (Darwin); (2) Tidies to the Makefile,
1411 including adding "make clean"; (3) Added -fPIC when compiling the test
1412 dynamically loaded module, to get rid of a warning.
1414 MH/02 Fix for bug #451, causing paniclog entries to be written if a bounce
1415 message fails, move_frozen_messages = true and ignore_bounce_errors_after
1416 = 0s. The bug is otherwise harmless.
1418 PH/07 There was a bug in the dovecot authenticator such that the value of
1419 $auth1 could be overwritten, and so not correctly preserved, after a
1420 successful authentication. This usually meant that the value preserved by
1421 the server_setid option was incorrect.
1423 PH/08 Added $smtp_count_at_connection_start, deliberately with a long name.
1425 PH/09 Installed PCRE release 7.0.
1427 PH/10 The acl_not_smtp_start ACL was, contrary to the documentation, not being
1428 run for batched SMTP input. It is now run at the start of every message
1429 in the batch. While fixing this I discovered that the process information
1430 (output by running exiwhat) was not always getting set for -bs and -bS
1431 input. This is fixed, and it now also says "batched" for BSMTP.
1433 PH/11 Added control=no_pipelining.
1435 PH/12 Added $sending_ip_address and $sending_port (mostly Magnus Holmgren's
1436 patch, slightly modified), and move the expansion of helo_data till after
1437 the connection is made in the smtp transport (so it can use these
1440 PH/13 Added ${rfc2047d: to decoded RFC 2047 strings.
1442 PH/14 Added log_selector = +pid.
1444 PH/15 Flush SMTP output before delaying, unless control=no_delay_flush is set.
1446 PH/16 Add ${if forany and ${if forall.
1448 PH/17 Added dsn_from option to vary the From: line in DSNs.
1450 PH/18 Flush SMTP output before performing a callout, unless control =
1451 no_callout_flush is set.
1453 PH/19 Change 4.64/PH/36 introduced a bug: when address_retry_include_sender
1454 was true (the default) a successful delivery failed to delete the retry
1455 item, thus causing premature timeout of the address. The bug is now
1458 PH/20 Added hosts_avoid_pipelining to the smtp transport.
1460 PH/21 Long custom messages for fakedefer and fakereject are now split up
1461 into multiline reponses in the same way that messages for "deny" and
1462 other ACL rejections are.
1464 PH/22 Applied Jori Hamalainen's speed-up changes and typo fixes to exigrep,
1465 with slight modification.
1467 PH/23 Applied sieve patches from the maintainer "tracking the latest notify
1468 draft, changing the syntax and factoring some duplicate code".
1470 PH/24 When the log selector "outgoing_port" was set, the port was shown as -1
1471 for deliveries of the second and subsequent messages over the same SMTP
1474 PH/25 Applied Magnus Holmgren's patch for ${addresses, ${map, ${filter, and
1475 ${reduce, with only minor "tidies".
1477 SC/02 Applied Daniel Tiefnig's patch to improve the '($parent) =' pattern match.
1479 PH/26 Added a "continue" ACL modifier that does nothing, for the benefit of its
1480 expansion side effects.
1482 PH/27 When a message times out after an over-quota error from an Exim-imposed
1483 quota, the bounce message says "mailbox is full". This message was not
1484 being given when it was a system quota that was exceeded. It now should
1487 MH/03 Made $recipients available in local_scan(). local_scan() already has
1488 better access to the recipient list through recipients_list[], but
1489 $recipients can be useful in postmaster-provided expansion strings.
1491 PH/28 The $smtp_command and $smtp_command_argument variables were not correct
1492 in the case of a MAIL command with additional options following the
1493 address, for example: MAIL FROM:<foo@bar> SIZE=1234. The option settings
1494 were accidentally chopped off.
1496 PH/29 SMTP synchronization checks are implemented when a command is read -
1497 there is a check that no more input is waiting when there shouldn't be
1498 any. However, for some commands, a delay in an ACL can mean that it is
1499 some time before the response is written. In this time, more input might
1500 arrive, invalidly. So now there are extra checks after an ACL has run for
1501 HELO/EHLO and after the predata ACL, and likewise for MAIL and RCPT when
1502 pipelining has not been advertised.
1504 PH/30 MH's patch to allow iscntrl() characters to be list separators.
1506 PH/31 Unlike :fail:, a custom message specified with :defer: was not being
1507 returned in the SMTP response when smtp_return_error_details was false.
1508 This has been fixed.
1510 PH/32 Change the Dovecot authenticator to use read() and write() on the socket
1511 instead of the C I/O that was originally supplied, because problems were
1512 reported on Solaris.
1514 PH/33 Compile failed with OpenSSL 0.9.8e. This was due to a coding error in
1515 Exim which did not show up earlier: it was assuming that a call to
1516 SSL_CTX_set_info_callback() might give an error value. In fact, there is
1517 no error. In previous releases of OpenSSL, SSL_CTX_set_info_callback()
1518 was a macro that became an assignment, so it seemed to work. This has
1519 changed to a proper function call with a void return, hence the compile
1520 error. Exim's code has been fixed.
1522 PH/34 Change HDA_SIZE in oracle.c from 256 to 512. This is needed for 64-bit
1525 PH/35 Applied a patch from the Sieve maintainer which fixes a bug in "notify".
1527 PH/36 Applied John Jetmore's patch to add -v functionality to exigrep.
1529 PH/37 If a message is not accepted after it has had an id assigned (e.g.
1530 because it turns out to be too big or there is a timeout) there is no
1531 "Completed" line in the log. When some messages of this type were
1532 selected by exigrep, they were listed as "not completed". Others were
1533 picked up by some special patterns. I have improved the selection
1534 criteria to be more general.
1536 PH/38 The host_find_failed option in the manualroute router can now be set
1537 to "ignore", to completely ignore a host whose IP address cannot be
1538 found. If all hosts are ignored, the behaviour is controlled by the new
1539 host_all_ignored option.
1541 PH/39 In a list of hosts for manualroute, if one item (either because of multi-
1542 homing or because of multiple MX records with /mx) generated more than
1543 one IP address, and the following item turned out to be the local host,
1544 all the secondary addresses of the first item were incorrectly removed
1545 from the list, along with the local host and any following hosts (which
1546 is what is supposed to happen).
1548 PH/40 When Exim receives a message, it writes the login name, uid, and gid of
1549 whoever called Exim into the -H file. In the case of the daemon it was
1550 behaving confusingly. When first started, it used values for whoever
1551 started the daemon, but after a SIGHUP it used the Exim user (because it
1552 calls itself on a restart). I have changed the code so that it now always
1555 PH/41 (Following a suggestion from Tony Finch) If all the RCPT commands in a
1556 message are rejected with the same error (e.g. no authentication or bad
1557 sender address), and a DATA command is nevertheless sent (as can happen
1558 with PIPELINING or a stupid MUA), the error message that was given to the
1559 RCPT commands is included in the rejection of the DATA command. This is
1560 intended to be helpful for MUAs that show only the final error to their
1563 PH/42 Another patch from the Sieve maintainer.
1565 SC/02 Eximstats - Differentiate between permanent and temporary rejects.
1566 Eximstats - Fixed some broken HTML links and added missing column headers
1568 Eximstats - Fixed Grand Total Summary Domains, Edomains, and Email
1569 columns for Rejects, Temp Rejects, Ham, and Spam rows.
1571 SC/03 Eximstats - V1.58 Fix to get <> and blackhole to show in edomain tables.
1573 PH/43 Yet another patch from the Sieve maintainer.
1575 PH/44 I found a way to check for a TCP/IP connection going away before sending
1576 the response to the final '.' that terminates a message, but only in the
1577 case where the client has not sent further data following the '.'
1578 (unfortunately, this is allowed). However, in many cases there won't be
1579 any further data because there won't be any more messages to send. A call
1580 to select() can be used: if it shows that the input is "ready", there is
1581 either input waiting, or the socket has been closed. An attempt to read
1582 the next input character can distinguish the two cases. Previously, Exim
1583 would have sent an OK response which the client would never have see.
1584 This could lead to message repetition. This fix should cure that, at
1585 least in a lot of common cases.
1587 PH/45 Do not advertise STARTTLS in response to HELP unless it would be
1588 advertised in response to EHLO.
1594 PH/01 Two more bugs that were introduced by 4.64/PH/07, in addition to the one
1595 fixed by 4.65/MH/01 (is this a record?) are fixed:
1597 (i) An empty string was always treated as zero by the numeric comparison
1598 operators. This behaviour has been restored.
1600 (ii) It is documented that the numeric comparison operators always treat
1601 their arguments as decimal numbers. This was broken in that numbers
1602 starting with 0 were being interpreted as octal.
1604 While fixing these problems I realized that there was another issue that
1605 hadn't been noticed. Values of message_size_limit (both the global option
1606 and the transport option) were treated as octal if they started with 0.
1607 The documentation was vague. These values are now always treated as
1608 decimal, and I will make that clear in the documentation.
1614 TK/01 Disable default definition of HAVE_LINUX_SENDFILE. Clashes with
1615 Linux large file support (_FILE_OFFSET_BITS=64) on older glibc
1618 MH/01 Don't check that the operands of numeric comparison operators are
1619 integers when their expansion is in "skipping" mode (fixes bug
1620 introduced by 4.64-PH/07).
1622 PH/01 If a system filter or a router generates more than SHRT_MAX (32767)
1623 child addresses, Exim now panics and dies. Previously, because the count
1624 is held in a short int, deliveries were likely to be lost. As such a
1625 large number of recipients for a single message is ridiculous
1626 (performance will be very, very poor), I have chosen to impose a limit
1627 rather than extend the field.
1633 TK/01 Bugzilla #401. Fix DK spooling code so that it can overwrite a
1634 leftover -K file (the existence of which was triggered by #402).
1635 While we were at it, introduced process PID as part of the -K
1636 filename. This should rule out race conditions when creating
1639 TK/02 Bugzilla #402. Apply patch from Simon Arlott, speeding up DK signing
1640 processing considerably. Previous code took too long for large mails,
1641 triggering a timeout which in turn triggers #401.
1643 TK/03 Introduced HAVE_LINUX_SENDFILE to os.h-Linux. Currently only used
1644 in the DK code in transports.c. sendfile() is not really portable,
1645 hence the _LINUX specificness.
1647 TF/01 In the add_headers option to the mail command in an Exim filter,
1648 there was a bug that Exim would claim a syntax error in any
1649 header after the first one which had an odd number of characters
1652 PH/01 If a server that rejects MAIL FROM:<> was the target of a sender
1653 callout verification, Exim cached a "reject" for the entire domain. This
1654 is correct for most verifications, but it is not correct for a recipient
1655 verification with use_sender or use_postmaster set, because in that case
1656 the callout does not use MAIL FROM:<>. Exim now distinguishes the special
1657 case of MAIL FROM:<> rejection from other early rejections (e.g.
1658 rejection of HELO). When verifying a recipient using a non-null MAIL
1659 address, the cache is ignored if it shows MAIL FROM:<> rejection.
1660 Whatever the result of the callout, the value of the domain cache is
1661 left unchanged (for any other kind of callout, getting as far as trying
1662 RCPT means that the domain itself is ok).
1664 PH/02 Tidied a number of unused variable and signed/unsigned warnings that
1667 PH/03 On Solaris, an unexpectedly close socket (dropped connection) can
1668 manifest itself as EPIPE rather than ECONNECT. When tidying away a
1669 session, the daemon ignores ECONNECT errors and logs others; it now
1670 ignores EPIPE as well.
1672 PH/04 Applied Nico Erfurth's refactoring patch to tidy up mime.c
1673 (quoted-printable decoding).
1675 PH/05 Applied Nico Erfurth's refactoring patch to tidy up spool_mbox.c, and
1676 later the small subsequent patch to fix an introduced bug.
1678 PH/06 Installed the latest Cygwin Makefile from the Cygwin maintainer.
1680 PH/07 There was no check for overflow in expansions such as ${if >{1}{4096M}}.
1682 PH/08 An error is now given if message_size_limit is specified negative.
1684 PH/09 Applied and tidied up Jakob Hirsch's patch for allowing ACL variables
1685 to be given (somewhat) arbitrary names.
1687 JJ/01 exipick 20060919.0, allow for arbitrary acl_ variables introduced
1690 JJ/02 exipick 20060919.0, --show-vars args can now be regular expressions,
1691 miscellaneous code fixes
1693 PH/10 Added the log_reject_target ACL modifier to specify where to log
1696 PH/11 Callouts were setting the name used for EHLO/HELO from $smtp_active_
1697 hostname. This is wrong, because it relates to the incoming message (and
1698 probably the interface on which it is arriving) and not to the outgoing
1699 callout (which could be using a different interface). This has been
1700 changed to use the value of the helo_data option from the smtp transport
1701 instead - this is what is used when a message is actually being sent. If
1702 there is no remote transport (possible with a router that sets up host
1703 addresses), $smtp_active_hostname is used.
1705 PH/12 Installed Andrey Panin's patch to add a dovecot authenticator. Various
1706 tweaks were necessary in order to get it to work (see also 21 below):
1707 (a) The code assumed that strncpy() returns a negative number on buffer
1708 overflow, which isn't the case. Replaced with Exim's string_format()
1710 (b) There were several signed/unsigned issues. I just did the minimum
1711 hacking in of casts. There is scope for a larger refactoring.
1712 (c) The code used strcasecmp() which is not a standard C function.
1713 Replaced with Exim's strcmpic() function.
1714 (d) The code set only $1; it now sets $auth1 as well.
1715 (e) A simple test gave the error "authentication client didn't specify
1716 service in request". It would seem that Dovecot has changed its
1717 interface. Fortunately there's a specification; I followed it and
1718 changed what the client sends and it appears to be working now.
1720 PH/13 Added $message_headers_raw to provide the headers without RFC 2047
1723 PH/14 Corrected misleading output from -bv when -v was also used. Suppose the
1724 address A is aliased to B and C, where B exists and C does not. Without
1725 -v the output is "A verified" because verification stops after a
1726 successful redirection if more than one address is generated. However,
1727 with -v the child addresses are also verified. Exim was outputting "A
1728 failed to verify" and then showing the successful verification for C,
1729 with its parentage. It now outputs "B failed to verify", showing B's
1730 parentage before showing the successful verification of C.
1732 PH/15 Applied Michael Deutschmann's patch to allow DNS black list processing to
1733 look up a TXT record in a specific list after matching in a combined
1736 PH/16 It seems that the options setting for the resolver (RES_DEFNAMES and
1737 RES_DNSRCH) can affect the behaviour of gethostbyname() and friends when
1738 they consult the DNS. I had assumed they would set it the way they
1739 wanted; and indeed my experiments on Linux seem to show that in some
1740 cases they do (I could influence IPv6 lookups but not IPv4 lookups).
1741 To be on the safe side, however, I have now made the interface to
1742 host_find_byname() similar to host_find_bydns(), with an argument
1743 containing the DNS resolver options. The host_find_byname() function now
1744 sets these options at its start, just as host_find_bydns() does. The smtp
1745 transport options dns_qualify_single and dns_search_parents are passed to
1746 host_find_byname() when gethostbyname=TRUE in this transport. Other uses
1747 of host_find_byname() use the default settings of RES_DEFNAMES
1748 (qualify_single) but not RES_DNSRCH (search_parents).
1750 PH/17 Applied (a modified version of) Nico Erfurth's patch to make
1751 spool_read_header() do less string testing, by means of a preliminary
1752 switch on the second character of optional "-foo" lines. (This is
1753 overdue, caused by the large number of possibilities that now exist.
1754 Originally there were few.) While I was there, I also converted the
1755 str(n)cmp tests so they don't re-test the leading "-" and the first
1756 character, in the hope this might squeeze out yet more improvement.
1758 PH/18 Two problems with "group" syntax in header lines when verifying: (1) The
1759 flag allowing group syntax was set by the header_syntax check but not
1760 turned off, possible causing trouble later; (2) The flag was not being
1761 set at all for the header_verify test, causing "group"-style headers to
1762 be rejected. I have now set it in this case, and also caused header_
1763 verify to ignore an empty address taken from a group. While doing this, I
1764 came across some other cases where the code for allowing group syntax
1765 while scanning a header line wasn't quite right (mostly, not resetting
1766 the flag correctly in the right place). These bugs could have caused
1767 trouble for malformed header lines. I hope it is now all correct.
1769 PH/19 The functions {pwcheck,saslauthd}_verify_password() are always called
1770 with the "reply" argument non-NULL. The code, however (which originally
1771 came from elsewhere) had *some* tests for NULL when it wrote to *reply,
1772 but it didn't always do it. This confused somebody who was copying the
1773 code for some other use. I have removed all the tests.
1775 PH/20 It was discovered that the GnuTLS code had support for RSA_EXPORT, a
1776 feature that was used to support insecure browsers during the U.S. crypto
1777 embargo. It requires special client support, and Exim is probably the
1778 only MTA that supported it -- and would never use it because real RSA is
1779 always available. This code has been removed, because it had the bad
1780 effect of slowing Exim down by computing (never used) parameters for the
1781 RSA_EXPORT functionality.
1783 PH/21 On the advice of Timo Sirainen, added a check to the dovecot
1784 authenticator to fail if there's a tab character in the incoming data
1785 (there should never be unless someone is messing about, as it's supposed
1786 to be base64-encoded). Also added, on Timo's advice, the "secured" option
1787 if the connection is using TLS or if the remote IP is the same as the
1788 local IP, and the "valid-client-cert option" if a client certificate has
1791 PH/22 As suggested by Dennis Davis, added a server_condition option to *all*
1792 authenticators. This can be used for authorization after authentication
1793 succeeds. (In the case of plaintext, it servers for both authentication
1796 PH/23 Testing for tls_required and lost_connection in a retry rule didn't work
1797 if any retry times were supplied.
1799 PH/24 Exim crashed if verify=helo was activated during an incoming -bs
1800 connection, where there is no client IP address to check. In this
1801 situation, the verify now always succeeds.
1803 PH/25 Applied John Jetmore's -Mset patch.
1805 PH/26 Added -bem to be like -Mset, but loading a message from a file.
1807 PH/27 In a string expansion for a processed (not raw) header when multiple
1808 headers of the same name were present, leading whitespace was being
1809 removed from all of them, but trailing whitespace was being removed only
1810 from the last one. Now trailing whitespace is removed from each header
1811 before concatenation. Completely empty headers in a concatenation (as
1812 before) are ignored.
1814 PH/28 Fixed bug in backwards-compatibility feature of PH/09 (thanks to John
1815 Jetmore). It would have mis-read ACL variables from pre-4.61 spool files.
1817 PH/29 [Removed. This was a change that I later backed out, and forgot to
1818 correct the ChangeLog entry (that I had efficiently created) before
1819 committing the later change.]
1821 PH/30 Exim was sometimes attempting to deliver messages that had suffered
1822 address errors (4xx response to RCPT) over the same connection as other
1823 messages routed to the same hosts. Such deliveries are always "forced",
1824 so retry times are not inspected. This resulted in far too many retries
1825 for the affected addresses. The effect occurred only when there were more
1826 hosts than the hosts_max_try setting in the smtp transport when it had
1827 the 4xx errors. Those hosts that it had tried were not added to the list
1828 of hosts for which the message was waiting, so if all were tried, there
1829 was no problem. Two fixes have been applied:
1831 (i) If there are any address or message errors in an SMTP delivery, none
1832 of the hosts (tried or untried) are now added to the list of hosts
1833 for which the message is waiting, so the message should not be a
1834 candidate for sending over the same connection that was used for a
1835 successful delivery of some other message. This seems entirely
1836 reasonable: after all the message is NOT "waiting for some host".
1837 This is so "obvious" that I'm not sure why it wasn't done
1838 previously. Hope I haven't missed anything, but it can't do any
1839 harm, as the worst effect is to miss an optimization.
1841 (ii) If, despite (i), such a delivery is accidentally attempted, the
1842 routing retry time is respected, so at least it doesn't keep
1843 hammering the server.
1845 PH/31 Installed Andrew Findlay's patch to close the writing end of the socket
1846 in ${readsocket because some servers need this prod.
1848 PH/32 Added some extra debug output when updating a wait-xxx database.
1850 PH/33 The hint "could be header name not terminated by colon", which has been
1851 given for certain expansion errors for a long time, was not being given
1852 for the ${if def:h_colon_omitted{... case.
1854 PH/34 The spec says: "With one important exception, whenever a domain list is
1855 being scanned, $domain contains the subject domain." There was at least
1856 one case where this was not true.
1858 PH/35 The error "getsockname() failed: connection reset by peer" was being
1859 written to the panic log as well as the main log, but it isn't really
1860 panic-worthy as it just means the connection died rather early on. I have
1861 removed the panic log writing for the ECONNRESET error when getsockname()
1864 PH/36 After a 4xx response to a RCPT error, that address was delayed (in queue
1865 runs only) independently of the message's sender address. This meant
1866 that, if the 4xx error was in fact related to the sender, a different
1867 message to the same recipient with a different sender could confuse
1868 things. In particualar, this can happen when sending to a greylisting
1869 server, but other circumstances could also provoke similar problems.
1870 I have changed the default so that the retry time for these errors is now
1871 based a combination of the sender and recipient addresses. This change
1872 can be overridden by setting address_retry_include_sender=false in the
1875 PH/37 For LMTP over TCP/IP (the smtp transport), error responses from the
1876 remote server are returned as part of bounce messages. This was not
1877 happening for LMTP over a pipe (the lmtp transport), but now it is the
1878 same for both kinds of LMTP.
1880 PH/38 Despite being documented as not happening, Exim was rewriting addresses
1881 in header lines that were in fact CNAMEs. This is no longer the case.
1883 PH/39 If -R or -S was given with -q<time>, the effect of -R or -S was ignored,
1884 and queue runs started by the daemon processed all messages. This has
1885 been fixed so that -R and -S can now usefully be given with -q<time>.
1887 PH/40 Import PCRE release 6.7 (fixes some bugs).
1889 PH/41 Add bitwise logical operations to eval (courtesy Brad Jorsch).
1891 PH/42 Give an error if -q is specified more than once.
1893 PH/43 Renamed the variables $interface_address and $interface_port as
1894 $received_ip_address and $received_port, to make it clear that these
1895 values apply to message reception, and not to the outgoing interface when
1896 a message is delivered. (The old names remain recognized, of course.)
1898 PH/44 There was no timeout on the connect() call when using a Unix domain
1899 socket in the ${readsocket expansion. There now is.
1901 PH/45 Applied a modified version of Brad Jorsch's patch to allow "message" to
1902 be meaningful with "accept".
1904 SC/01 Eximstats V1.43
1905 Bug fix for V1.42 with -h0 specified. Spotted by Chris Lear.
1907 SC/02 Eximstats V1.44
1908 Use a glob alias rather than an array ref in the generated
1909 parser. This improves both readability and performance.
1911 SC/03 Eximstats V1.45 (Marco Gaiarin / Steve Campbell)
1912 Collect SpamAssassin and rejection statistics.
1913 Don't display local sender or destination tables unless
1914 there is data to show.
1915 Added average volumes into the top table text output.
1917 SC/04 Eximstats V1.46
1918 Collect data on the number of addresses (recipients)
1919 as well as the number of messages.
1921 SC/05 Eximstats V1.47
1922 Added 'Message too big' to the list of mail rejection
1923 reasons (thanks to Marco Gaiarin).
1925 SC/06 Eximstats V1.48
1926 Mainlog lines which have GMT offsets and are too short to
1927 have a flag are now skipped.
1929 SC/07 Eximstats V1.49 (Alain Williams)
1930 Added the -emptyok flag.
1932 SC/08 Eximstats V1.50
1933 Fixes for obtaining the IP address from reject messages.
1935 JJ/03 exipick.20061117.2, made header handling as similar to exim as possible
1936 (added [br]h_ prefixes, implemented RFC2047 decoding. Fixed
1937 whitesspace changes from 4.64-PH/27
1939 JJ/04 exipick.20061117.2, fixed format and added $message_headers_raw to
1942 JJ/05 exipick.20061117.2, bug fixes (error out sooner when invalid criteria
1943 are found, allow negative numbers in numeric criteria)
1945 JJ/06 exipick.20061117.2, added new $message_body_missing variable
1947 JJ/07 exipick.20061117.2, added $received_ip_address and $received_port
1948 to match changes made in 4.64-PH/43
1950 PH/46 Applied Jori Hamalainen's patch to add features to exiqsumm.
1952 PH/47 Put in an explicit test for a DNS lookup of an address record where the
1953 "domain" is actually an IP address, and force a failure. This locks out
1954 those revolvers/nameservers that support "A-for-A" lookups, in
1955 contravention of the specifications.
1957 PH/48 When a host name was looked up from an IP address, and the subsequent
1958 forward lookup of the name timed out, the host name was left in
1959 $sender_host_name, contrary to the specification.
1961 PH/49 Although default lookup types such as lsearch* or cdb*@ have always been
1962 restricted to single-key lookups, Exim was not diagnosing an error if
1963 * or *@ was used with a query-style lookup.
1965 PH/50 Increased the value of DH_BITS in tls-gnu.c from 768 to 1024.
1967 MH/01 local_scan ABI version incremented to 1.1. It should have been updated
1968 long ago, but noone interested enough thought of it. Let's just say that
1969 the "1.1" means that there are some new functions that weren't there at
1970 some point in the past.
1972 PH/51 Error processing for expansion failure of helo_data from an smtp
1973 transport during callout processing was broken.
1975 PH/52 Applied John Jetmore's patch to allow tls-on-connect and STARTTLS to be
1976 tested/used via the -bh/-bhc/-bs options.
1978 PH/53 Added missing "#include <time.h>" to pcre/pcretest.c (this was a PCRE
1979 bug, fixed in subsequent PCRE releases).
1981 PH/54 Applied Robert Bannocks' patch to avoid a problem with references that
1982 arises when using the Solaris LDAP libraries (but not with OpenLDAP).
1984 PH/55 Check for a ridiculously long file name in exim_dbmbuild.
1990 SC/01 Use a glob alias rather than an array ref in eximstats generated
1991 parser. This improves both readability and performance.
1993 SC/02 Collect SpamAssassin and rejection statistics in eximstats.
1994 Don't display local sender or destination tables in eximstats unless
1995 there is data to show.
1996 Added average volumes into the eximstats top table text output.
1998 SC/03 Collect data on the number of addresses (recipients) as well
1999 as the number of messages in eximstats.
2001 TF/01 Correct an error in the documentation for the redirect router. Exim
2002 does (usually) call initgroups() when daemonizing.
2004 TF/02 Call initgroups() when dropping privilege in exim.c, so that Exim runs
2005 with consistent privilege compared to when running as a daemon.
2007 TF/03 Note in the spec that $authenticated_id is not set for local
2008 submissions from trusted users.
2010 TF/04 The ratelimit per_rcpt option now works correctly in acl_not_smtp.
2011 Thanks to Dean Brooks <dean@iglou.com> for the patch.
2013 TF/05 Make it easier to get SMTP authentication and TLS/SSL support working
2014 by adding some example configuration directives to the default
2015 configuration file. A little bit of work is required to uncomment the
2016 directives and define how usernames and passwords are checked, but
2017 there is now a framework to start from.
2019 PH/01 Added #define LDAP_DEPRECATED 1 to ldap.c because some of the "old"
2020 functions that Exim currently uses aren't defined in ldap.h for OpenLDAP
2021 without this. I don't know how relevant this is to other LDAP libraries.
2023 PH/02 Add the verb name to the "unknown ACL verb" error.
2025 PH/03 Magnus Holmgren's patch for filter_prepend_home.
2027 PH/03 Fixed Bugzilla #101: macro definition between ACLs doesn't work.
2029 PH/04 Applied Magnus Holmgren's patch to fix Bugzilla #98: transport's home
2030 directory not expanded when it should be if an expanded home directory
2031 was set for the address (which is overridden by the transport).
2033 PH/05 Applied Alex Kiernan's patch to fix Bugzilla #99: a problem with
2036 PH/06 Added acl_not_smtp_start, based on Johannes Berg's patch, and set the
2037 bit to forbid control=suppress_local_fixups in the acl_not_smtp ACL,
2038 because it is too late at that time, and has no effect.
2040 PH/07 Changed ${quote_pgsql to quote ' as '' instead of \' because of a
2041 security issue with \' (bugzilla #107). I could not use the
2042 PQescapeStringConn() function, because it needs a PGconn value as one of
2045 PH/08 When testing addresses using -bt, indicate those final addresses that
2046 are duplicates that would not cause an additional delivery. At least one
2047 person was confused, thinking that -bt output corresponded to deliveries.
2048 (Suppressing duplicates isn't a good idea as you lose the information
2049 about possibly different redirections that led to the duplicates.)
2051 PH/09 Applied patch from Erik to use select() instead of poll() in spam.c on
2052 systems where poll() doesn't work, in particular OS X.
2054 PH/10 Added more information to debugging output for retry time not reached.
2056 PH/11 Applied patch from Arkadiusz Miskiewicz to apply a timeout to read
2057 operations in malware.c.
2059 PH/12 Applied patch from Magnus Holmgren to include the "h" tag in Domain Keys
2062 PH/13 If write_rejectlog was set false when logging was sent to syslog with
2063 syslog_duplication set false, log lines that would normally be written
2064 both the the main log and to the reject log were not written to syslog at
2067 PH/14 In the default configuration, change the use of "message" in ACL warn
2068 statements to "add_header".
2070 PH/15 Diagnose a filter syntax error for "seen", "unseen", or "noerror" if not
2071 not followed by a command (e.g. "seen endif").
2073 PH/16 Recognize SMTP codes at the start of "message" in ACLs and after :fail:
2074 and :defer: in a redirect router. Add forbid_smtp_code to suppress the
2077 PH/17 Added extra conditions to the default value of delay_warning_condition
2081 { !eq{$h_list-id:$h_list-post:$h_list-subscribe:}{} } \
2082 { match{$h_precedence:}{(?i)bulk|list|junk} } \
2083 { match{$h_auto-submitted:}{(?i)auto-generated|auto-replied} } \
2086 The Auto-Submitted: and various List- headers are standardised, whereas I
2087 don't think Precedence: ever was.
2089 PH/18 Refactored debugging code in route_finduser() to show more information,
2090 in particular, the error code if getpwnam() issues one.
2092 PH/19 Added PQsetClientEncoding(conn, "SQL_ASCII") to the pgsql code module.
2093 This is apparently needed in addition to the PH/07 change above to avoid
2094 any possible encoding problems.
2096 PH/20 Perl can change the locale. Exim was resetting it after a ${perl call,
2097 but not after initializing Perl.
2099 PH/21 Added a call to PQsetNoticeProcessor() to catch pgsql "notices" and
2100 output them only if debugging. By default they are written stderr,
2101 apparently, which is not desirable.
2103 PH/22 Added Alain Williams' LDAP patch to support setting REFERRALS=off on
2106 JJ/01 exipick: added --reverse (and -R synonym), --random, --size, --sort and
2109 JJ/02 exipick: rewrote --help documentation to hopefully make more clear.
2111 PH/23 Made -oMaa and -oMt work with -bh and -bs to pretend the connection is
2112 authenticated or an ident call has been made. Suppress the default
2113 values for $authenticated_id and $authenticated_sender (but permit -oMai
2114 and -oMas) when testing with -bh.
2116 PH/24 Re-jigged the order of the tests in the default configuration so that the
2117 tests for valid domains and recipients precede the DNS black list and CSA
2118 tests, on the grounds that those ones are more expensive.
2120 PH/25 Exim was not testing for a space following SMTP commands such as EHLO
2121 that require one. Thus, EHLORHUBARB was interpreted as a valid command.
2122 This bug exists in every version of Exim that I still have, right back to
2125 PH/26 (n)wildlsearch lookups are documented as being done case-insensitively.
2126 However, an attempt to turn on case-sensitivity in a regex key by
2127 including (?-i) didn't work because the subject string was already
2128 lowercased, and the effects were non-intuitive. It turns out that a
2129 one-line patch can be used to allow (?-i) to work as expected.
2135 TF/01 Fix the add_header change below (4.61 PH/55) which had a bug that (amongst
2136 other effects) broke the use of negated acl sub-conditions.
2138 PH/01 ${readsocket now supports Internet domain sockets (modified John Jetmore
2141 PH/02 When tcp-wrappers is called from Exim, it returns only "deny" or "allow".
2142 "Deny" causes Exim to reject the incoming connection with a 554 error.
2143 Unfortunately, if there is a major crisis, such as a disk failure,
2144 tcp-wrappers gives "deny", whereas what one would like would be some
2145 kind of temporary error. A kludge has been added to help with this.
2146 Before calling hosts_ctl(), errno is set zero. If the result is "deny", a
2147 554 error is used if errno is still zero or contains ENOENT (which occurs
2148 if either of the /etc/hosts.{allow,deny} files is missing). Otherwise, a
2151 PH/03 Add -lutil to the default FreeBSD LIBS setting.
2153 PH/04 Change PH/19 for 4.61 was too wide. It should not be applied to host
2154 errors. Otherwise a message that provokes a temporary error (when other
2155 messages do not) can cause a whole host to time out.
2157 PH/05 Batch deliveries by appendfile and pipe transports did not work when the
2158 addresses were routed directly to files or pipes from a redirect router.
2159 File deliveries just didn't batch; pipe deliveries might have suffered
2162 PH/06 A failure to get a lock for a hints database would erroneously always say
2163 "Failed to get write lock", even when it was really a read lock.
2165 PH/07 The appendfile transport was creating MBX lock files with a fixed mode
2166 of 0600. This has been changed to use the value of the lockfile_mode
2167 option (which defaults to 0600).
2169 PH/08 Applied small patch from the Sieve maintainer.
2171 PH/09 If maildir_quota_directory_regex was set to exclude (say) the .Trash
2172 folder from quota calculations, a direct delivery into this folder messed
2173 up the contents of the maildirsize file. This was because the regex was
2174 used only to exclude .Trash (or whatever) when the size of the mailbox
2175 was calculated. There was no check that a delivery was happening into an
2176 excluded directory. This bug has been fixed by ignoring all quota
2177 processing for deliveries into excluded directories.
2179 PH/10 Added the maildirfolder_create_regex option to appendfile.
2185 PH/01 The code for finding all the local interface addresses on a FreeBSD
2186 system running IPv6 was broken. This may well have applied to all BSD
2187 systems, as well as to others that have similar system calls. The broken
2188 code found IPv4 interfaces correctly, but gave incorrect values for the
2189 IPv6 interfaces. In particular, ::1 was not found. The effect in Exim was
2190 that it would not match correctly against @[] and not recognize the IPv6
2193 PH/02 The ipliteral router was not recognizing addresses of the form user@
2194 [ipv6:....] because it didn't know about the "ipv6:" prefix.
2196 PH/03 Added disable_ipv6.
2198 PH/04 Changed $reply_address to use the raw form of the headers instead of the
2199 decoded form, because it is most often used to construct To: headers
2200 lines in autoreplies, and the decoded form may well be syntactically
2201 invalid. However, $reply_address has leading white space removed, and all
2202 newlines turned into spaces so that the autoreply transport does not
2205 PH/05 If group was specified without a user on a router, and no group or user
2206 was specified on a transport, the group from the router was ignored.
2208 PH/06 Increased the number of ACL variables to 20 of each type, and arranged
2209 for visible compile-time settings that can be used to change these
2210 numbers, for those that want even more. Backwards compatibility with old
2211 spool files has been maintained. However, going back to a previous Exim
2212 release will lost any variables that are in spool files.
2214 PH/07 Two small changes when running in the test harness: increase delay when
2215 passing a TCP/IP connection to a new process, in case the original
2216 process has to generate a bounce, and remove special handling of
2217 127.0.0.2 (sic), which is no longer necessary.
2219 PH/08 Changed debug output of dbfn_open() flags from numbers to names, so as to
2220 be the same on different OS.
2222 PH/09 Moved a debug statement in filter processing to avoid a race problem when
2225 JJ/01 exipick: fixed bug where -b (brief) output option showed "Vars:"
2226 whether --show-vars was specified or not
2228 JJ/02 exipick: Added support for new ACL variable spool format introduced
2231 PH/10 Fixed another bug related to PH/04 above: if an incoming message had a
2232 syntactically invalid From: or Reply-to: line, and a filter used this to
2233 generate an autoreply, and therefore failed to obtain an address for the
2234 autoreply, Exim could try to deliver to a non-existent relative file
2235 name, causing unrelated and misleading errors. What now happens is that
2236 it logs this as a hard delivery error, but does not attempt to create a
2239 PH/11 The exinext utility has a -C option for testing purposes, but although
2240 the given file was scanned by exinext itself; it wasn't being passed on
2241 when Exim was called.
2243 PH/12 In the smtp transport, treat an explicit ECONNRESET error the same as
2244 an end-of-file indication when reading a command response.
2246 PH/13 Domain literals for IPv6 were not recognized unless IPv6 support was
2247 compiled. In many other places in Exim, IPv6 addresses are always
2248 recognized, so I have changed this. It also means that IPv4 domain
2249 literals of the form [IPV4:n.n.n.n] are now always recognized.
2251 PH/14 When a uid/gid is specified for the queryprogram router, it cannot be
2252 used if the router is not running as root, for example, when verifying at
2253 ACL time, or when using -bh. The debugging output from this situation was
2254 non-existent - all you got was a failure to exec. I have made two
2257 (a) Failures to set uid/gid, the current directory, or a process leader
2258 in a subprocess such as that created by queryprogram now generate
2259 suitable debugging ouput when -d is set.
2261 (b) The queryprogram router detects when it is not running as root,
2262 outputs suitable debugging information if -d is set, and then runs
2263 the subprocess without attempting to change uid/gid.
2265 PH/15 Minor change to Makefile for building test_host (undocumented testing
2268 PH/16 As discussed on the list in Nov/Dec: Exim no longer looks at the
2269 additional section of a DNS packet that returns MX or SRV records.
2270 Instead, it always explicitly searches for A/AAAA records. This avoids
2271 major problems that occur when a DNS server includes only records of one
2272 type (A or AAAA) in an MX/SRV packet. A byproduct of this change has
2273 fixed another bug: if SRV records were looked up and the corresponding
2274 address records were *not* found in the additional section, the port
2275 values from the SRV records were lost.
2277 PH/17 If a delivery to a pipe, file, or autoreply was deferred, Exim was not
2278 using the correct key (the original address) when searching the retry
2279 rules in order to find which one to use for generating the retry hint.
2281 PH/18 If quota_warn_message contains a From: header, Exim now refrains from
2282 adding the default one. Similarly, if it contains a Reply-To: header, the
2283 errors_reply_to option, if set, is not used.
2285 PH/19 When calculating a retry time, Exim used to measure the "time since
2286 failure" by looking at the "first failed" field in the retry record. Now
2287 it does not use this if it is later than than the arrival time of the
2288 message. Instead it uses the arrival time. This makes for better
2289 behaviour in cases where some deliveries succeed, thus re-setting the
2290 "first failed" field. An example is a quota failure for a huge message
2291 when small messages continue to be delivered. Without this change, the
2292 "time since failure" will always be short, possible causing more frequent
2293 delivery attempts for the huge message than are intended.
2294 [Note: This change was subsequently modified - see PH/04 for 4.62.]
2296 PH/20 Added $auth1, $auth2, $auth3 to contain authentication data (as well as
2297 $1, $2, $3) because the numerical variables can be reset during some
2298 expansion items (e.g. "match"), thereby losing the authentication data.
2300 PH/21 Make -bV show the size of off_t variables so that the test suite can
2301 decide whether to run tests for quotas > 2G.
2303 PH/22 Test the values given for quota, quota_filecount, quota_warn_threshold,
2304 mailbox_size, and mailbox_filecount in the appendfile transport. If a
2305 filecount value is greater than 2G or if a quota value is greater than 2G
2306 on a system where the size of off_t is not greater than 4, a panic error
2309 PH/23 When a malformed item such as 1.2.3/24 appears in a host list, it can
2310 never match. The debug and -bh output now contains an explicit error
2311 message indicating a malformed IPv4 address or mask.
2313 PH/24 An host item such as 1.2.3.4/abc was being treated as the IP address
2314 1.2.3.4 without a mask. Now it is not recognized as an IP address, and
2315 PH/23 above applies.
2317 PH/25 Do not write to syslog when running in the test harness. The only
2318 occasion when this arises is a failure to open the main or panic logs
2319 (for which there is an explicit test).
2321 PH/26 Added the /no_tell option to "control=freeze".
2323 PH/27 If a host name lookup failed very early in a connection, for example, if
2324 the IP address matched host_lookup and the reverse lookup yielded a name
2325 that did not have a forward lookup, an error message of the form "no IP
2326 address found for host xxx.xxx.xxx (during SMTP connection from NULL)"
2327 could be logged. Now it outputs the IP address instead of "NULL".
2329 PH/28 An enabling patch from MH: add new function child_open_exim2() which
2330 allows the sender and the authenticated sender to be set when
2331 submitting a message from within Exim. Since child_open_exim() is
2332 documented for local_scan(), the new function should be too.
2334 PH/29 In GnuTLS, a forced expansion failure for tls_privatekey was not being
2335 ignored. In both GnuTLS and OpenSSL, an expansion of tls_privatekey that
2336 results in an empty string is now treated as unset.
2338 PH/30 Fix eximon buffer overflow bug (Bugzilla #73).
2340 PH/31 Added sender_verify_fail logging option.
2342 PH/32 In November 2003, the code in Exim that added an empty Bcc: header when
2343 needed by RFC 822 but not by RFC 2822 was commented out. I have now
2344 tidied the source and removed it altogether.
2346 PH/33 When a queue run was abandoned because the load average was too high, a
2347 log line was always written; now it is written only if the queue_run log
2348 selector is set. In addition, the log line for abandonment now contains
2349 information about the queue run such as the pid. This is always present
2350 in "start" and "stop" lines but was omitted from the "abandon" line.
2352 PH/34 Omit spaces between a header name and the colon in the error message that
2353 is given when verify = headers_syntax fails (if there are lots of them,
2354 the message gets confusing).
2356 PH/35 Change the default for dns_check_names_pattern to allow slashes within
2357 names, as there are now some PTR records that contain slashes. This check
2358 is only to protect against broken name servers that fall over on strange
2359 characters, so the fact that it applies to all lookups doesn't matter.
2361 PH/36 Now that the new test suite is complete, we can remove some of the
2362 special code in Exim that was needed for the old test suite. For example,
2363 sorting DNS records because real resolvers return them in an arbitrary
2364 order. The new test suite's fake resolver always returns records in the
2367 PH/37 When running in the test harness, use -odi for submitted messages (e.g.
2368 bounces) except when queue_only is set, to avoid logging races between
2369 the different processes.
2371 PH/38 Panic-die if .include specifies a non-absolute path.
2373 PH/39 A tweak to the "H" retry rule from its user.
2375 JJ/03 exipick: Removed parentheses from 'next' and 'last' calls that specified
2376 a label. They prevented compilation on older perls.
2378 JJ/04 exipick: Refactored code to prevent implicit split to @_ which caused
2379 a warning to be raised on newish perls.
2381 JJ/05 exipick: Fixed bug where -bpc always showed a count of all messages
2382 on queue. Changes to match documented behaviour of showing count of
2383 messages matching specified criteria.
2385 PH/40 Changed the default ident timeout from 30s to 5s.
2387 PH/41 Added support for the use of login_cap features, on those BSD systems
2388 that have them, for controlling the resources used by pipe deliveries.
2390 PH/42 The content-scanning code uses fopen() to create files in which to put
2391 message data. Previously it was not paying any attention to the mode of
2392 the files. Exim runs with umask(0) because the rest of the code creates
2393 files with open(), and sets the required mode explicitly. Thus, these
2394 files were ending up world-writeable. This was not a big issue, because,
2395 being within the spool directory, they were not world-accessible. I have
2396 created a function called modefopen, which takes an additional mode
2397 argument. It sets umask(777), creates the file, chmods it to the required
2398 mode, then resets the umask. All the relevant calls to fopen() in the
2399 content scanning code have been changed to use this function.
2401 PH/43 If retry_interval_max is set greater than 24 hours, it is quietly reset
2402 to 24 hours. This avoids potential overflow problems when processing G
2403 and H retry rules. I suspect nobody ever tinkers with this value.
2405 PH/44 Added STRIP_COMMAND=/usr/bin/strip to the FreeBSD Makefile.
2407 PH/45 When the plaintext authenticator is running as a client, the server's
2408 challenges are checked to ensure they are valid base64 strings. By
2409 default, the authentication attempt is cancelled if an invalid string is
2410 received. Setting client_ignore_invalid_base64 true ignores these errors.
2411 The decoded challenge strings are now placed in $auth1, $auth2, etc. as
2412 they are received. Thus, the responses can be made to depend on the
2413 challenges. If an invalid string is ignored, an empty string is placed in
2416 PH/46 Messages that are created by the autoreply transport now contains a
2417 References: header, in accordance with RFCs 2822 and 3834.
2419 PH/47 Added authenticated_sender_force to the smtp transport.
2421 PH/48 The ${prvs expansion was broken on systems where time_t was long long.
2423 PH/49 Installed latest patch from the Sieve maintainer.
2425 PH/50 When an Exim quota was set without a file count quota, and mailbox_size
2426 was also set, the appendfile transport was unnecessarily scanning a
2427 directory of message files (e.g. for maildir delivery) to find the count
2428 of files (along with the size), even though it did not need this
2429 information. It now does the scan only if it needs to find either the
2430 size of the count of files.
2432 PH/51 Added ${time_eval: to convert Exim time strings into seconds.
2434 PH/52 Two bugs concerned with error handling when the smtp transport is
2437 (i) Exim was not creating retry information for temporary errors given
2438 for individual recipients after the DATA command when the smtp transport
2439 was used in LMTP mode. This meant that they could be retried too
2440 frequently, and not timed out correctly.
2442 (ii) Exim was setting the flag that allows error details to be returned
2443 for LMTP errors on RCPT commands, but not for LMTP errors for individual
2444 recipients that were returned after the DATA command.
2446 PH/53 This is related to PH/52, but is more general: for any failing address,
2447 when detailed error information was permitted to be returned to the
2448 sender, but the error was temporary, then after the final timeout, only
2449 "retry timeout exceeded" was returned. Now it returns the full error as
2450 well as "retry timeout exceeded".
2452 PH/54 Added control=allow_auth_unadvertised, as it seems there are clients that
2453 do this, and (what is worse) MTAs that accept it.
2455 PH/55 Added the add_header modified to ACLs. The use of "message" with "warn"
2456 will now be deprecated.
2458 PH/56 New os.c-cygwin from the Cygwin maintainer.
2460 JJ/06 exipick: added --unsorted option to allow unsorted output in all output
2461 formats (previously only available in exim formats via -bpr, -bpru,
2462 and -bpra. Now also available in native and exiqgrep formats)
2464 JJ/07 exipick: added --freeze and --thaw options to allow faster interaction
2465 with very large, slow to parse queues
2467 JJ/08 exipick: added ! as generic prefix to negate any criteria format
2469 JJ/09 exipick: miscellaneous performance enhancements (~24% improvements)
2471 PH/57 Tidies in SMTP dialogue display in debug output: (i) It was not showing
2472 responses to authentication challenges, though it was showing the
2473 challenges; (ii) I've removed the CR characters from the debug output for
2476 PH/58 Allow for the insertion of a newline as well as a space when a string
2477 is turned into more than one encoded-word during RFC 2047 encoding. The
2478 Sieve code now uses this.
2480 PH/59 Added the following errors that can be detected in retry rules: mail_4xx,
2481 data_4xx, lost_connection, tls_required.
2483 PH/60 When a VRFY deferred or FAILED, the log message rather than the user
2484 message was being sent as an SMTP response.
2486 PH/61 Add -l and -k options to exicyclog.
2488 PH/62 When verifying, if an address was redirected to one new address, so that
2489 verification continued, and the new address failed or deferred after
2490 having set something in $address_data, the value of $address_data was not
2491 passed back to the ACL. This was different to the case when no
2492 redirection occurred. The value is now passed back in both cases.
2494 PH/63 Changed the macro HAVE_LOGIN_CAP (see PH/41 for this release above) to
2495 HAVE_SETCLASSRESOURCES because there are different APIs in use that all
2496 use login_cap.h, so on its own it isn't the distinguishing feature. The
2497 new name refers directly to the setclassresources() function.
2499 PH/65 Added configuration files for NetBSD3.
2501 PH/66 Updated OS/Makefile-HP-UX for gcc 4.1.0 with HP-UX 11.
2503 PH/67 Fixed minor infelicity in the sorting of addresses to ensure that IPv6
2504 is preferred over IPv4.
2506 PH/68 The bounce_return_message and bounce_return_body options were not being
2507 honoured for bounces generated during the reception of non-SMTP messages.
2508 In particular, this applied to messages rejected by the ACL. This bug has
2509 been fixed. However, if bounce_return_message is true and bounce_return_
2510 body is false, the headers that are returned for a non-SMTP message
2511 include only those that have been read before the error was detected.
2512 (In the case of an ACL rejection, they have all been read.)
2514 PH/69 The HTML version of the specification is now built in a directory called
2515 spec_html instead of spec.html, because the latter looks like a path with
2516 a MIME-type, and this confuses some software.
2518 PH/70 Catch two compiler warnings in sieve.c.
2520 PH/71 Fixed an obscure and subtle bug (thanks Alexander & Matthias). The
2521 function verify_get_ident() calls ip_connect() to connect a socket, but
2522 if the "connect()" function timed out, ip_connect() used to close the
2523 socket. However, verify_get_ident() also closes the socket later, and in
2524 between Exim writes to the log, which may get opened at this point. When
2525 the socket was closed in ip_connect(), the log could get the same file
2526 descriptor number as the socket. This naturally causes chaos. The fix is
2527 not to close the socket in ip_connect(); the socket should be closed by
2528 the function that creates it. There was only one place in the code where
2529 this was missing, in the iplookup router, which I don't think anybody now
2530 uses, but I've fixed it anyway.
2532 PH/72 Make dns_again_means_nonexist apply to lookups using gethostbyname() as
2533 well as to direct DNS lookups. Otherwise the handling of names in host
2534 lists is inconsistent and therefore confusing.
2540 PH/01 Two changes to the default runtime configuration:
2542 (1) Move the checks for relay_from_hosts and authenticated clients from
2543 after to before the (commented out) DNS black list checks.
2545 (2) Add control=submission to the relay_from_hosts and authenticated
2546 clients checks, on the grounds that messages accepted by these
2547 statements are most likely to be submissions.
2549 PH/02 Several tidies to the handling of ${prvs and ${prvscheck:
2551 (1) Generate an error if the third argument for the ${prvs expansion is
2554 (2) Treat a missing third argument of ${prvscheck as if it were an empty
2557 (3) Reset the variables that are obtained from the first argument of
2558 ${prvscheck and used in the second argument before leaving the code,
2559 because their memory is reclaimed, so using them afterwards may do
2562 (4) Tidy up the code for expanding the arguments of ${prvscheck one by
2563 one (it's much easier than Tom thought :-).
2565 (5) Because of (4), we can now allow for the use of $prvscheck_result
2566 inside the third argument.
2568 PH/03 For some reason, the default setting of PATH when running a command from
2569 a pipe transport was just "/usr/bin". I have changed it to
2572 PH/04 SUPPORT_TRANSLATE_IP_ADDRESS and MOVE_FROZEN_MESSAGES did not cause
2573 anything to be listed in the output from -bV.
2575 PH/05 When a filter generated an autoreply, the entire To: header line was
2576 quoted in the delivery log line, like this:
2578 => >A.N.Other <ano@some.domain> <original@ddress> ...
2580 This has been changed so that it extracts the operative address. There
2581 may be more than one such address. If so, they are comma-separated, like
2584 => >ano@some.domain,ona@other.domain <original@ddress> ...
2586 PH/06 When a client host used a correct literal IP address in a HELO or EHLO
2587 command, (for example, EHLO [1.2.3.4]) and the client's IP address was
2588 not being looked up in the rDNS to get a host name, Exim was showing the
2589 IP address twice in Received: lines, even though the IP addresses were
2590 identical. For example:
2592 Received: from [1.2.3.4] (helo=[1.2.3.4])
2594 However, if the real host name was known, it was omitting the HELO data
2595 if it matched the actual IP address. This has been tidied up so that it
2596 doesn't show the same IP address twice.
2598 PH/07 When both +timestamp and +memory debugging was on, the value given by
2599 $tod_xxx expansions could be wrong, because the tod_stamp() function was
2600 called by the debug printing, thereby overwriting the timestamp buffer.
2601 Debugging no longer uses the tod_stamp() function when +timestamp is set.
2603 PH/08 When the original message was included in an autoreply transport, it
2604 always said "this is a copy of the message, including all the headers",
2605 even if body_only or headers_only was set. It now gives an appropriate
2608 PH/09 Applied a patch from the Sieve maintainer which:
2610 o fixes some comments
2611 o adds the (disabled) notify extension core
2612 o adds some debug output for the result of if/elsif tests
2613 o points to the current vacation draft in the documentation
2614 and documents the missing references header update
2618 o fixes a bug in processing the envelope test (when testing
2619 multiple envelope elements, the last element determinted the
2622 PH/10 Exim was violating RFC 3834 ("Recommendations for Automatic Responses to
2623 Electronic Mail") by including:
2625 Auto-submitted: auto-generated
2627 in the messages that it generates (bounce messages and others, such as
2628 warnings). In the case of bounce messages for non-SMTP mesages, there was
2629 also a typo: it was using "Auto_submitted" (underscore instead of
2630 hyphen). Since every message generated by Exim is necessarily in response
2631 to another message, thes have all been changed to:
2633 Auto-Submitted: auto-replied
2635 in accordance with these statements in the RFC:
2637 The auto-replied keyword:
2639 - SHOULD be used on messages sent in direct response to another
2640 message by an automatic process,
2642 - MUST NOT be used on manually-generated messages,
2644 - MAY be used on Delivery Status Notifications (DSNs) and Message
2645 Disposition Notifications (MDNs),
2647 - MUST NOT be used on messages generated by automatic or periodic
2648 processes, except for messages which are automatic responses to
2651 PH/11 Added "${if def:sender_address {(envelope-from <$sender_address>)\n\t}}"
2652 to the default Received: header definition.
2654 PH/12 Added log selector acl_warn_skipped (default on).
2656 PH/13 After a successful wildlsearch lookup, discard the values of numeric
2657 variables because (a) they are in the wrong storage pool and (b) even if
2658 they were copied, it wouldn't work properly because of the caching.
2660 PH/14 Add check_rfc2047_length to disable enforcement of RFC 2047 length
2661 checking when decoding. Apparently there are clients that generate
2662 overlong encoded strings. Why am I not surprised?
2664 PH/15 If the first argument of "${if match_address" was not empty, but did not
2665 contain an "@" character, Exim crashed. Now it writes a panic log message
2666 and treats the condition as false.
2668 PH/16 In autoreply, treat an empty string for "once" the same as unset.
2670 PH/17 A further patch from the Sieve maintainer: "Introduce the new Sieve
2671 extension "envelope-auth". The code is finished and in agreement with
2672 other implementations, but there is no documentation so far and in fact,
2673 nobody wrote the draft yet. This extension is currently #undef'ed, thus
2674 not changing the active code.
2676 Print executed "if" and "elsif" statements when debugging is used. This
2677 helps a great deal to understand what a filter does.
2679 Document more things not specified clearly in RFC3028. I had all this
2680 sorted out, when out of a sudden new issues came to my mind. Oops."
2682 PH/18 Exim was not recognizing the "net-" search type prefix in match_ip lists
2685 PH/19 Exim expands the IPv6 address given to -bh to its full non-abbreviated
2686 canonical form (as documented). However, after a host name lookup from
2687 the IP address, check_host() was doing a simple string comparison with
2688 addresses acquired from the DNS when checking that the found name did
2689 have the original IP as one of its addresses. Since any found IPv6
2690 addresses are likely to be in abbreviated form, the comparison could
2691 fail. Luckily, there already exists a function for doing the comparison
2692 by converting both addresses to binary, so now that is used instead of
2693 the text comparison.
2695 PH/20 There was another similar case to PH/19, when a complete host name was
2696 given in a host list; looking up its IP address could give an abbreviated
2697 form, whereas the current host's name might or might not be abbreviated.
2698 The same fix has been applied.
2704 PH/01 The ${base62: operator adjusted itself to base 36 when BASE_62 was
2705 set to 36 (for Darwin and Cygwin), but the ${base62d: operator did not.
2708 PH/02 Two minor problems detected in Cygwin: the os.{c,h} files had lost */ on
2709 the CVS lines, and there was a missing #if HAVE_IPV6 in host.c.
2711 PH/03 Typo: missing ".o" in src/pcre/Makefile.
2713 PH/04 Tighten up "personal" tests: Instead of testing for any "List-"
2714 header line, restrict the check to what is listed in RFCs 2369 and 2929.
2715 Also, for "Auto-Submitted", treat anything other than "no" as
2716 non-personal, in accordance with RFC 3834. (Previously it treated
2717 anything starting "auto-" as non-personal.)
2719 TF/01 The control=submission/name=... option had a problem with syntax
2720 errors if the name included a slash character. The /name= option
2721 now slurps the rest of the string, so it can include any characters
2722 but it must come last in the list of options (after /sender_retain
2725 PH/05 Some modifications to the interface to the fake nameserver for the new
2733 TK/01 Added the "success_on_redirect" address verification option. See
2734 NewStuff for rationale and an example.
2736 PH/01 Added support for SQLite, basic code supplied by David Woodhouse.
2738 PH/02 Patch to exigrep to allow it to work on syslog lines.
2740 PH/03 When creating an mbox file for a virus/spam scan, use fseek() instead of
2741 fread() to skip over the body file's header line, because in Cygwin the
2742 header line is locked and is inaccessible.
2744 PH/04 Added $message_exim_id, ultimately to replace $message_id (they will both
2745 co-exist for some time) to make it clear that it is the Exim ID that is
2746 referenced, not the Message-ID: header line.
2748 PH/05 Replaced all Tom's calls to snprintf() with calls to the internal
2749 string_format() function, because snprintf() does not exist on all
2752 PH/06 The use of forbid_filter_existstest now also locks out the use of the
2753 ${stat: expansion item.
2755 PH/07 Changed "SMTP protocol violation: synchronization error" into "SMTP
2756 protocol synchronization error", to keep the pedants happy.
2758 PH/08 Arrange for USE_INET_NTOA_FIX to be set in config.h for AIX systems as
2759 well as for IRIX systems, when gcc is being used. See the host.c source
2762 PH/09 Installed latest Cygwin configuration files from the Cygwin maintainer.
2764 PH/10 Named domain lists were not working if used in a queue_smtp_domains
2767 PH/11 Added support for the IGNOREQUOTA extension to LMTP, both to the lmtp
2768 transport and to the smtp transport in LMTP mode.
2770 TK/02 Remove one case of BASE64 error detection FTTB (undocumented anyway).
2772 PH/12 There was a missing call to search_tidyup() before the fork() in rda.c to
2773 run a filter in a subprocess. This could lead to confusion in subsequent
2774 lookups in the parent process. There should also be a search_tidyup() at
2775 the end of the subprocess.
2777 PH/13 Previously, if "verify = helo" was set in an ACL, the condition was true
2778 only if the host matched helo_try_verify_hosts, which caused the
2779 verification to occur when the EHLO/HELO command was issued. The ACL just
2780 tested the remembered result. Now, if a previous verification attempt has
2781 not happened, "verify = helo" does it there and then.
2783 JJ/01 exipick: added $message_exim_id variable (see 4.53-PH/04)
2785 TK/03 Fix log output including CR from clamd.
2787 PH/14 A reference to $reply_address when Reply-to: was empty and From: did not
2788 exist provoked a memory error which could cause a segfault.
2790 PH/15 Installed PCRE 6.2
2792 PH/17 Defined BIND_8_COMPAT in the Darwin os.h file.
2794 PH/18 Reversed 4.52/PH/17 because the HP-UX user found it wasn't the cause
2795 of the problem. Specifically, suggested +O2 rather than +O1 for the
2798 PH/19 Added sqlite_lock_timeout option (David Woodhouse's patch).
2800 PH/20 If a delivery was routed to a non-standard port by means of an SRV
2801 record, the port was not correctly logged when the outgoing_port log
2802 selector was set (it logged the transort's default port).
2804 PH/21 Added support for host-specific ports to manualroute, queryprogram,
2805 fallback_hosts, and "hosts" in the smtp transport.
2807 PH/22 If the log selector "outgoing_port" is set, the port is now also given on
2808 host errors such as "Connection refused".
2810 PH/23 Applied a patch to fix problems with exim-4.52 while doing radius
2811 authentication with radiusclient 0.4.9:
2813 - Error returned from rc_read_config was caught wrongly
2814 - Username/password not passed on to radius server due to wrong length.
2816 The presumption is that some radiusclient API changes for 4.51/PH/17
2817 were not taken care of correctly. The code is still untested by me (my
2818 Linux distribution still has 0.3.2 of radiusclient), but it was
2819 contributed by a Radius user.
2821 PH/24 When doing a callout, the value of $domain wasn't set correctly when
2822 expanding the "port" option of the smtp transport.
2824 TK/04 MIME ACL: Fix buffer underrun that occurs when EOF condition is met
2825 while reading a MIME header. Thanks to Tom Hughes for a patch.
2827 PH/24 Include config.h inside local_scan.h so that configuration settings are
2830 PH/25 Make $smtp_command_argument available after all SMTP commands. This means
2831 that in an ACL for RCPT (for example), you can examine exactly what was
2834 PH/26 Exim was recognizing IPv6 addresses of the form [IPv6:....] in EHLO
2835 commands, but it was not correctly comparing the address with the actual
2836 client host address. Thus, it would show the EHLO address in Received:
2837 header lines when this was not necessary.
2839 PH/27 Added the % operator to ${eval:}.
2841 PH/28 Exim tries to create and chdir to its spool directory when it starts;
2842 it should be ignoring failures (because with -C, for example, it has lost
2843 privilege). It wasn't ignoring creation failures other than "already
2846 PH/29 Added "crypteq" to the list of supported features that Exim outputs when
2849 PH/30 Fixed (presumably very longstanding) bug in exim_dbmbuild: if it failed
2850 because an input line was too long, either on its own, or by virtue of
2851 too many continuations, the temporary file was not being removed, and the
2852 return code was incorrect.
2854 PH/31 Missing "BOOL" in function definition in filtertest.c.
2856 PH/32 Applied Sieve patches from the maintainer.
2858 TK/05 Domainkeys: Accomodate for a minor API change in libdomainkeys 0.67.
2860 PH/33 Added "verify = not_blind".
2862 PH/34 There are settings for CHOWN_COMMAND and MV_COMMAND that can be used in
2863 Local/Makefile (with some defaults set). These are used in built scripts
2864 such as exicyclog, but they have never been used in the exim_install
2865 script (though there are many overriding facilities there). I have
2866 arranged that the exim_install script now takes note of these two
2869 PH/35 Installed configuration files for Dragonfly.
2871 PH/36 When a locally submitted message by a trusted user did not contain a
2872 From: header, and the sender address was obtained from -f or from an SMTP
2873 MAIL command, and the trusted user did not use -F to supply a sender
2874 name, $originator_name was incorrectly used when constructing a From:
2875 header. Furthermore, $originator_name was used for submission mode
2876 messages from external hosts without From: headers in a similar way,
2877 which is clearly wrong.
2879 PH/37 Added control=suppress_local_fixups.
2881 PH/38 When log_selector = +received_sender was set, and the addition of the
2882 sender made the log line's construction buffer exactly full, or one byte
2883 less than full, an overflow happened when the terminating "\n" was
2886 PH/39 Added a new log selector, "unknown_in_list", which provokes a log entry
2887 when the result of a list match is failure because a DNS lookup failed.
2889 PH/40 RM_COMMAND is now used in the building process.
2891 PH/41 Added a "distclean" target to the top-level Makefile; it deletes all
2892 the "build-* directories that it finds.
2894 PH/42 (But a TF fix): In a domain list, Exim incorrectly matched @[] if the IP
2895 address in a domain literal was a prefix of an interface address.
2897 PH/43 (Again a TF fix): In the dnslookup router, do not apply widen_domains
2898 when verifying a sender address, unless rewrite_headers is false.
2900 PH/44 Wrote a long comment about why errors_to addresses are verified as
2901 recipients, not senders.
2903 TF/01 Add missing LIBS=-lm to OS/Makefile-OpenBSD which was overlooked when
2904 the ratelimit ACL was added.
2906 PH/45 Added $smtp_command for the full command (cf $smtp_command_argument).
2908 PH/46 Added extra information about PostgreSQL errors to the error string.
2910 PH/47 Added an interface to a fake DNS resolver for use by the new test suite,
2911 avoiding the need to install special zones in a real server. This is
2912 backwards compatible; if it can't find the fake resolver, it drops back.
2913 Thus, both old and new test suites can be run.
2915 TF/02 Added util/ratelimit.pl
2917 TF/03 Minor fix to the ratelimit code to improve its behaviour in case the
2918 clock is set back in time.
2920 TF/04 Fix the ratelimit support in exim_fixdb. Patch provided by Brian
2921 Candler <B.Candler@pobox.com>.
2923 TF/05 The fix for PH/43 was not completely correct; widen_domains is always
2924 OK for addresses that are the result of redirections.
2926 PH/48 A number of further additions for the benefit of the new test suite,
2927 including a fake gethostbyname() that interfaces to the fake DNS resolver
2930 TF/06 The fix for widen_domains has also been applied to qualify_single and
2931 search_parents which are the other dnslookup options that can cause
2934 PH/49 Michael Haardt's randomized retrying, but as a separate retry parameter
2937 PH/50 Make never_users, trusted_users, admin_groups, trusted_groups expandable.
2939 TF/07 Exim produced the error message "an SRV record indicated no SMTP
2940 service" if it encountered an MX record with an empty target hostname.
2941 The message is now "an MX or SRV record indicated no SMTP service".
2943 TF/08 Change PH/13 introduced the possibility that verify=helo may defer,
2944 if the DNS of the sending site is misconfigured. This is quite a
2945 common situation. This change restores the behaviour of treating a
2946 helo verification defer as a failure.
2948 PH/51 If self=fail was set on a router, the bounce message did not include the
2949 actual error message.
2955 TF/01 Added support for Client SMTP Authorization. See NewStuff for details.
2957 PH/01 When a transport filter timed out in a pipe delivery, and the pipe
2958 command itself ended in error, the underlying message about the transport
2959 filter timeout was being overwritten with the pipe command error. Now the
2960 underlying error message should be appended to the second error message.
2962 TK/01 Fix poll() being unavailable on Mac OSX 10.2.
2964 PH/02 Reduce the amount of output that "make" produces by default. Full output
2965 can still be requested.
2967 PH/03 The warning log line about a condition test deferring for a "warn" verb
2968 was being output only once per connection, rather than after each
2969 occurrence (because it was using the same function as for successful
2970 "warn" verbs). This seems wrong, so I have changed it.
2972 TF/02 Two buglets in acl.c which caused Exim to read a few bytes of memory that
2973 it should not have, which might have caused a crash in the right
2974 circumstances, but probably never did.
2976 PH/04 Installed a modified version of Tony Finch's patch to make submission
2977 mode fix the return path as well as the Sender: header line, and to
2978 add a /name= option so that you can make the user's friendly name appear
2981 TF/03 Added the control = fakedefer ACL modifier.
2983 TF/04 Added the ratelimit ACL condition. See NewStuff for details. Thanks to
2984 Mark Lowes for thorough testing.
2986 TK/02 Rewrote SPF support to work with libspf2 versions >1.2.0.
2988 TK/03 Merged latest SRS patch from Miles Wilton.
2990 PH/05 There's a shambles in IRIX6 - it defines EX_OK in unistd.h which conflicts
2991 with the definition in sysexits.h (which is #included earlier).
2992 Fortunately, Exim does not actually use EX_OK. The code used to try to
2993 preserve the sysexits.h value, by assumimg that macro definitions were
2994 scanned for macro replacements. I have been disabused of this notion,
2995 so now the code just undefines EX_OK before #including unistd.h.
2997 PH/06 There is a timeout for writing blocks of data, set by, e.g. data_timeout
2998 in the smtp transport. When a block could not be written in a single
2999 write() function, the timeout was being re-applied to each part-write.
3000 This seems wrong - if the receiver was accepting one byte at a time it
3001 would take for ever. The timeout is now adjusted when this happens. It
3002 doesn't have to be particularly precise.
3004 TK/04 Added simple SPF lookup method in EXPERIMENTAL_SPF. See NewStuff for
3005 details. Thanks to Chris Webb <chris@arachsys.com> for the patch!
3007 PH/07 Added "fullpostmaster" verify option, which does a check to <postmaster>
3008 without a domain if the check to <postmaster@domain> fails.
3010 SC/01 Eximstats: added -xls and the ability to specify output files
3011 (patch written by Frank Heydlauf).
3013 SC/02 Eximstats: use FileHandles for outputing results.
3015 SC/03 Eximstats: allow any combination of xls, txt, and html output.
3017 SC/04 Eximstats: fixed display of large numbers with -nvr option
3019 SC/05 Eximstats: fixed merging of reports with empty tables.
3021 SC/06 Eximstats: added the -include_original_destination flag
3023 SC/07 Eximstats: removed tabs and trailing whitespace.
3025 TK/05 Malware: Improve on aveserver error handling. Patch from Alex Miller.
3027 TK/06 MBOX spool code: Add real "From " MBOX separator line
3028 so the .eml file is really in mbox format (even though
3029 most programs do not really care). Patch from Alex Miller.
3031 TK/07 MBOX spool code: Add X-Envelope-From: and X-Envelope-To: headers.
3032 The latter is generated from $received_to and is only set if the
3033 message has one envelope recipient. SA can use these headers,
3034 obviously out-of-the-box. Patch from Alex Miller.
3036 PH/08 The ${def test on a variable was returning false if the variable's
3037 value was "0", contrary to what the specification has always said!
3038 The result should be true unless the variable is empty.
3040 PH/09 The syntax error of a character other than { following "${if
3041 def:variable_name" (after optional whitespace) was not being diagnosed.
3042 An expansion such as ${if def:sender_ident:{xxx}{yyy}} in which an
3043 accidental colon was present, for example, could give incorrect results.
3045 PH/10 Tidied the code in a number of places where the st_size field of a stat()
3046 result is used (not including appendfile, where other changes are about
3049 PH/11 Upgraded appendfile so that quotas larger than 2G are now supported.
3050 This involved changing a lot of size variables from int to off_t. It
3051 should work with maildirs and everything.
3053 TK/08 Apply fix provided by Michael Haardt to prevent deadlock in case of
3054 spamd dying while we are connected to it.
3056 TF/05 Fixed a ${extract error message typo reported by Jeremy Harris
3059 PH/12 Applied Alex Kiernan's patch for the API change for the error callback
3060 function for BDB 4.3.
3062 PH/13 Changed auto_thaw such that it does not apply to bounce messages.
3064 PH/14 Imported PCRE 6.0; this was more than just a trivial operation because
3065 the sources for PCRE have been re-arranged and more files are now
3068 PH/15 The code I had for printing potentially long long variables in PH/11
3069 above was not the best (it lost precision). The length of off_t variables
3070 is now inspected at build time, and an appropriate printing format (%ld
3071 or %lld) is chosen and #defined by OFF_T_FMT. We also define LONGLONG_T
3072 to be "long long int" or "long int". This is needed for the internal
3073 formatting function string_vformat().
3075 PH/16 Applied Matthew Newton's patch to exicyclog: "If log_file_path is set in
3076 the configuration file to be ":syslog", then the script "guesses" where
3077 the logs files are, rather than using the compiled in default. In our
3078 case the guess is not the same as the compiled default, so the script
3079 suddenly stopped working when I started to use syslog. The patch checks
3080 to see if log_file_path is "". If so, it attempts to read it from exim
3081 with no configuration file to get the compiled in version, before it
3082 falls back to the previous guessing code."
3084 TK/09 Added "prvs" and "prvscheck" expansion items. These help a lot with
3085 implementing BATV in an Exim configuration. See NewStuff for the gory
3088 PH/17 Applied Michael Haardt's patch for HP-UX, affecting only the os.h and
3089 Makefile that are specific to HP-UX.
3091 PH/18 If the "use_postmaster" option was set for a recipient callout together
3092 with the "random" option, the postmaster address was used as the MAIL
3093 FROM address for the random test, but not for the subsequent recipient
3094 test. It is now used for both.
3096 PH/19 Applied Michael Haardt's patch to update Sieve to RFC3028bis. "The
3097 patch removes a few documentation additions to RFC 3028, because the
3098 latest draft now contains them. It adds the new en;ascii-case comparator
3099 and a new error check for 8bit text in MIME parts. Comparator and
3100 require names are now matched exactly. I enabled the subaddress
3101 extension, but it is not well tested yet (read: it works for me)."
3103 PH/20 Added macros for time_t as for off_t (see PH/15 above) and used them to
3104 rework some of the code of TK/09 above to avoid the hardwired use of
3105 "%lld" and "long long". Replaced the call to snprintf() with a call to
3108 PH/21 Added some other messages to those in 4.51/PH/42, namely "All relevant MX
3109 records point to non-existent hosts", "retry timeout exceeded", and
3110 "retry time not reached for any host after a long failure period".
3112 PH/22 Fixed some oversights/typos causing bugs when Exim is compiled with
3113 experimental DomainKeys support:
3115 (1) The filter variables $n0-$n9 and $sn0-$sn9 were broken.
3116 (2) On an error such as an illegally used "control", the wrong name for
3117 the control was given.
3119 These problems did NOT occur unless DomainKeys support was compiled.
3121 PH/23 Added daemon_startup_retries and daemon_startup_sleep.
3123 PH/24 Added ${if match_ip condition.
3125 PH/25 Put debug statements on either side of calls to EXIM_DBOPEN() for hints
3126 databases so that it will be absolutely obvious if a crash occurs in the
3127 DB library. This is a regular occurrence (often caused by mis-matched
3130 PH/26 Insert a lot of missing (void) casts for functions such as chown(),
3131 chmod(), fcntl(), sscanf(), and other functions from stdio.h. These were
3132 picked up on a user's system that detects such things. There doesn't seem
3133 to be a gcc warning option for this - only an attribute that has to be
3134 put on the function's prototype. It seems that in Fedora Core 4 they have
3135 set this on a number of new functions. No doubt there will be more in due
3138 PH/27 If a dnslookup or manualroute router is set with verify=only, it need not
3139 specify a transport. However, if an address that was verified by such a
3140 router was the subject of a callout, Exim crashed because it tried to
3141 read the rcpt_include_affixes from the non-existent transport. Now it
3142 just assumes that the setting of that option is false. This bug was
3143 introduced by 4.51/PH/31.
3145 PH/28 Changed -d+all to exclude +memory, because that information is very
3146 rarely of interest, but it makes the output a lot bigger. People tend to
3147 do -d+all out of habit.
3149 PH/29 Removed support for the Linux-libc5 build, as it is obsolete and the
3150 code in os-type was giving problems when libc.so lives in lib64, like on
3153 PH/30 Exim's DNS code uses the original T_xxx names for DNS record times. These
3154 aren't the modern standard, and it seems that some systems' include files
3155 don't always have them. Exim was already checking for some of the newer
3156 ones like T_AAAA, and defining it itself. I've added checks for all the
3157 record types that Exim uses.
3159 PH/31 When using GnuTLS, if the parameters cache file did not exist, Exim was
3160 not automatically generating a new one, as it is supposed to. This
3161 prevented TLS from working. If the file did exist, but contained invalid
3162 data, a new version was generated, as expected. It was only the case of a
3163 non-existent file that was broken.
3165 TK/10 Domainkeys: Fix a bug in verification that caused a crash in conjunction
3166 with a change in libdomainkeys > 0.64.
3168 TK/11 Domainkeys: Change the logic how the "testing" policy flag is retrieved
3169 from DNS. If the selector record carries the flag, it now has
3170 precedence over the domain-wide flag.
3172 TK/12 Cleared some compiler warnings related to SPF, SRS and DK code.
3174 PH/32 In mua_wrapper mode, if an smtp transport configuration error (such as
3175 the use of a port name that isn't defined in /etc/services) occurred, the
3176 message was deferred as in a normal delivery, and thus remained on the
3177 spool, instead of being failed because of the mua_wrapper setting. This
3178 is now fixed, and I tidied up some of the mua_wrapper messages at the
3181 SC/08 Eximstats: whilst parsing the mainlog(s), store information about
3182 the messages in a hash of arrays rather than using individual hashes.
3183 This is a bit cleaner and results in dramatic memory savings, albeit
3184 at a slight CPU cost.
3186 SC/09 Eximstats: added the -show_rt<list> and the -show_dt<list> flags
3187 as requested by Marc Sherman.
3189 SC/10 Eximstats: added histograms for user specified patterns as requested
3192 SC/11 Eximstats: v1.43 - bugfix for pattern histograms with -h0 specified.
3194 PH/33 Patch from the Cygwin maintainer to add "b" to all occurences of
3195 fopen() in the content-scanning modules that did not already have it.
3201 TK/01 Added Yahoo DomainKeys support via libdomainkeys. See
3202 doc/experimental-spec.txt for details. (http://domainkeys.sf.net)
3204 TK/02 Fix ACL "control" statement not being available in MIME ACL.
3206 TK/03 Fix ACL "regex" condition not being available in MIME ACL.
3208 PH/01 Installed a patch from the Sieve maintainer that allows -bf to be used
3209 to test Sieve filters that use "vacation".
3211 PH/02 Installed a slightly modified version of Nikos Mavrogiannopoulos' patch
3212 that changes the way the GnuTLS parameters are stored in the cache file.
3213 The new format can be generated externally. For backward compatibility,
3214 if the data in the cache doesn't make sense, Exim assumes it has read an
3215 old-format file, and it generates new data and writes a new file. This
3216 means that you can't go back to an older release without removing the
3219 PH/03 A redirect router that has both "unseen" and "one_time" set does not
3220 work if there are any delivery delays because "one_time" forces the
3221 parent to be marked "delivered", so its unseen clone is never tried
3222 again. For this reason, Exim now forbids the simultaneous setting of
3225 PH/04 Change 4.11/85 fixed an obscure bug concerned with addresses that are
3226 redirected to themselves ("homonym" addresses). Read the long ChangeLog
3227 entry if you want to know the details. The fix, however, neglected to
3228 consider the case when local delivery batching is involved. The test for
3229 "previously delivered" was not happening when checking to see if an
3230 address could be batched with a previous (undelivered) one; under
3231 certain circumstances this could lead to multiple deliveries to the same
3234 PH/05 Renamed the macro SOCKLEN_T as EXIM_SOCKLEN_T because AIX uses SOCKLEN_T
3235 in its include files, and this causes problems building Exim.
3237 PH/06 A number of "verify =" ACL conditions have no options (e.g. verify =
3238 header_syntax) but Exim was just ignoring anything given after a slash.
3239 In particular, this caused confusion with an attempt to use "verify =
3240 reverse_host_lookup/defer_ok". An error is now given when options are
3241 supplied for verify items that do not have them. (Maybe reverse_host_
3242 lookup should have a defer_ok option, but that's a different point.)
3244 PH/07 Increase the size of the buffer for incoming SMTP commands from 512 (as
3245 defined by RFC 821) to 2048, because there were problems with some AUTH
3246 commands, and RFC 1869 says the size should be increased for extended
3247 SMTP commands that take arguments.
3249 PH/08 Added ${dlfunc dynamically loaded function for expansion (code from Tony
3252 PH/09 Previously, an attempt to use ${perl when it wasn't compiled gave an
3253 "unknown" error; now it says that the functionality isn't in the binary.
3255 PH/10 Added a nasty fudge to try to recognize and flatten LDAP passwords in
3256 an address' error message when a string expansion fails (syntax or
3257 whatever). Otherwise the password may appear in the log. Following change
3258 PH/42 below, there is no longer a chance of it appearing in a bounce
3261 PH/11 Installed exipick version 20050225.0 from John Jetmore.
3263 PH/12 If the last host in a fallback_hosts list was multihomed, only the first
3264 of its addresses was ever tried. (Bugzilla bug #2.)
3266 PH/13 If "headers_add" in a transport didn't end in a newline, Exim printed
3267 the result incorrectly in the debug output. (It correctly added a newline
3268 to what was transported.)
3270 TF/01 Added $received_time.
3272 PH/14 Modified the default configuration to add an acl_smtp_data ACL, with
3273 commented out examples of how to interface to a virus scanner and to
3274 SpamAssassin. Also added commented examples of av_scanner and
3275 spamd_address settings.
3277 PH/15 Further to TK/02 and TK/03 above, tidied up the tables of what conditions
3278 and controls are allowed in which ACLs. There were a couple of minor
3279 errors. Some of the entries in the conditions table (which is a table of
3280 where they are NOT allowed) were getting very unwieldy; rewrote them as a
3281 negation of where the condition IS allowed.
3283 PH/16 Installed updated OS/os.c-cygwin from the Cygwin maintainer.
3285 PH/17 The API for radiusclient changed at release 0.4.0. Unfortunately, the
3286 header file does not have a version number, so I've had to invent a new
3287 value for RADIUS_LIB_TYPE, namely "RADIUSCLIENTNEW" to request the new
3288 API. The code is untested by me (my Linux distribution still has 0.3.2 of
3289 radiusclient), but it was contributed by a Radius user.
3291 PH/18 Installed Lars Mainka's patch for the support of CRL collections in
3292 files or directories, for OpenSSL.
3294 PH/19 When an Exim process that is running as root has to create an Exim log
3295 file, it does so in a subprocess that runs as exim:exim so as to get the
3296 ownership right at creation (otherwise, other Exim processes might see
3297 the file with the wrong ownership). There was no test for failure of this
3298 fork() call, which would lead to the process getting stuck as it waited
3299 for a non-existent subprocess. Forks do occasionally fail when resources
3300 run out. I reviewed all the other calls to fork(); they all seem to check
3303 PH/20 When checking for unexpected SMTP input at connect time (before writing
3304 the banner), Exim was not dealing correctly with a non-positive return
3305 from the read() function. If the client had disconnected by this time,
3306 the result was a log entry for a synchronization error with an empty
3307 string after "input=" when read() returned zero. If read() returned -1
3308 (an event I could not check), uninitialized data bytes were printed.
3309 There were reports of junk text (parts of files, etc) appearing after
3312 PH/21 Added acl_not_smtp_mime to allow for MIME scanning for non-SMTP messages.
3314 PH/22 Added support for macro redefinition, and (re)definition in between
3315 driver and ACL definitions.
3317 PH/23 The cyrus_sasl authenticator was expanding server_hostname, but then
3318 forgetting to use the resulting value; it was using the unexpanded value.
3320 PH/24 The cyrus_sasl authenticator was advertising mechanisms for which it
3321 hadn't been configured. The fix is from Juergen Kreileder, who
3322 understands it better than I do:
3324 "Here's what I see happening with three configured cyrus_sasl
3325 authenticators configured (plain, login, cram-md5):
3327 On startup auth_cyrus_sasl_init() gets called for each of these.
3328 This means three calls to sasl_listmech() without a specified mech_list.
3329 => SASL tests which mechs of all available mechs actually work
3330 => three warnings about OTP not working
3331 => the returned list contains: plain, login, cram-md5, digest-md5, ...
3333 With the patch, sasl_listmech() also gets called three times. But now
3334 SASL's mech_list option is set to the server_mech specified in the the
3335 authenticator. Or in other words, the answer from sasl_listmech()
3336 gets limited to just the mech you're testing for (which is different
3338 => the return list contains just 'plain' or 'login', 'cram-md5' or
3339 nothing depending on the value of ob->server_mech.
3341 I've just tested the patch: Authentication still works fine,
3342 unavailable mechs specified in the exim configuration are still
3343 caught, and the auth.log warnings about OTP are gone."
3345 PH/25 When debugging is enabled, the contents of the command line are added
3346 to the debugging output, even when log_selector=+arguments is not
3349 PH/26 Change scripts/os-type so that when "uname -s" returns just "GNU", the
3350 answer is "GNU", and only if the return is "GNU/something" is the answer
3353 PH/27 $acl_verify_message is now set immediately after the failure of a
3354 verification in an ACL, and so is available in subsequent modifiers. In
3355 particular, the message can be preserved by coding like this:
3357 warn !verify = sender
3358 set acl_m0 = $acl_verify_message
3360 Previously, $acl_verify_message was set only while expanding "message"
3361 and "log_message" when a very denied access.
3363 PH/28 Modified OS/os.c-Linux with
3365 -#ifndef OS_LOAD_AVERAGE
3366 +#if !defined(OS_LOAD_AVERAGE) && defined(__linux__)
3368 to make Exim compile on kfreebsd-gnu. (I'm totally confused about the
3369 nomenclature these days.)
3371 PH/29 Installed patch from the Sieve maintainer that adds the options
3372 sieve_useraddress and sieve_subaddress to the redirect router.
3374 PH/30 In these circumstances:
3375 . Two addresses routed to the same list of hosts;
3376 . First host does not offer TLS;
3377 . First host accepts first address;
3378 . First host gives temporary error to second address;
3379 . Second host offers TLS and a TLS session is established;
3380 . Second host accepts second address.
3381 Exim incorrectly logged both deliveries with the TLS parameters (cipher
3382 and peerdn, if requested) that were in fact used only for the second
3385 PH/31 When doing a callout as part of verifying an address, Exim was not paying
3386 attention to any local part prefix or suffix that was matched by the
3387 router that accepted the address. It now behaves in the same way as it
3388 does for delivery: the affixes are removed from the local part unless
3389 rcpt_include_affixes is set on the transport.
3391 PH/32 Add the sender address, as F=<...>, to the log line when logging a
3392 timeout during the DATA phase of an incoming message.
3394 PH/33 Sieve envelope tests were broken for match types other than :is. I have
3395 applied a patch sanctioned by the Sieve maintainer.
3397 PH/34 Change 4.50/80 broke Exim in that it could no longer handle cases where
3398 the uid or gid is negative. A case of a negative gid caused this to be
3399 noticed. The fix allows for either to be negative.
3401 PH/35 ACL_WHERE_MIME is now declared unconditionally, to avoid too much code
3402 clutter, but the tables that are indexed by ACL_WHERE_xxx values had been
3405 PH/36 The change PH/12 above was broken. Fixed it.
3407 PH/37 Exim used to check for duplicate addresses in the middle of routing, on
3408 the grounds that routing the same address twice would always produce the
3409 same answer. This might have been true once, but it is certainly no
3410 longer true now. Routing a child address may depend on the previous
3411 routing that produced that child. Some complicated redirection strategies
3412 went wrong when messages had multiple recipients, and made Exim's
3413 behaviour dependent on the order in which the addresses were given.
3415 I have moved the duplicate checking until after the routing is complete.
3416 Exim scans the addresses that are assigned to local and remote
3417 transports, and removes any duplicates. This means that more work will be
3418 done, as duplicates will always all be routed, but duplicates are
3419 presumably rare, so I don't expect this is of any significance.
3421 For deliveries to pipes, files, and autoreplies, the duplicate checking
3422 still happens during the routing process, since they are not going to be
3425 PH/38 Installed a patch from Ian Freislich, with the agreement of Tom Kistner.
3426 It corrects a timeout issue with spamd. This is Ian's comment: "The
3427 background is that sometimes spamd either never reads data from a
3428 connection it has accepted, or it never writes response data. The exiscan
3429 spam.[ch] uses a 3600 second timeout on spamd socket reads, further, it
3430 blindly assumes that writes won't block so it may never time out."
3432 PH/39 Allow G after quota size as well as K and M.
3434 PH/40 The value set for $authenticated_id in an authenticator may not contain
3435 binary zeroes or newlines because the value is written to log lines and
3436 to spool files. There was no check on this. Now the value is run through
3437 the string_printing() function so that such characters are converted to
3438 printable escape sequences.
3440 PH/41 $message_linecount is a new variable that contains the total number of
3441 lines in the message. Compare $body_linecount, which is the count for the
3444 PH/42 Exim no longer gives details of delivery errors for specific addresses in
3445 bounce and delay warning messages, except in certain special cases, which
3448 (a) An SMTP error message from a remote host;
3449 (b) A message specified in a :fail: redirection;
3450 (c) A message specified in a "fail" command in a system filter;
3451 (d) A message specified in a FAIL return from the queryprogram router;
3452 (e) A message specified by the cannot_route_message router option.
3454 In these cases only, Exim does include the error details in bounce and
3455 warning messages. There are also a few cases where bland messages such
3456 as "unrouteable address" or "local delivery error" are given.
3458 PH/43 $value is now also set for the "else" part of a ${run expansion.
3460 PH/44 Applied patch from the Sieve maintainer: "The vacation draft is still
3461 being worked on, but at least Exim now implements the latest version to
3464 PH/45 In a pipe transport, although a timeout while waiting for the pipe
3465 process to complete was treated as a delivery failure, a timeout while
3466 writing the message to the pipe was logged, but erroneously treated as a
3467 successful delivery. Such timeouts include transport filter timeouts. For
3468 consistency with the overall process timeout, these timeouts are now
3469 treated as errors, giving rise to delivery failures by default. However,
3470 there is now a new Boolean option for the pipe transport called
3471 timeout_defer, which, if set TRUE, converts the failures into defers for
3472 both kinds of timeout. A transport filter timeout is now identified in
3475 PH/46 The "scripts/Configure-config.h" script calls "make" at one point. On
3476 systems where "make" and "gmake" are different, calling "gmake" at top
3477 level broke things. I've arranged for the value of $(MAKE) to be passed
3478 from the Makefile to this script so that it can call the same version of
3482 A note about Exim versions 4.44 and 4.50
3483 ----------------------------------------
3485 Exim 4.50 was meant to be the next release after 4.43. It contains a lot of
3486 changes of various kinds. As a consequence, a big documentation update was
3487 needed. This delayed the release for rather longer than seemed good, especially
3488 in the light of a couple of (minor) security issues. Therefore, the changes
3489 that fixed bugs were backported into 4.43, to create a 4.44 maintenance
3490 release. So 4.44 and 4.50 are in effect two different branches that both start
3493 I have left the 4.50 change log unchanged; it contains all the changes since
3494 4.43. The change log for 4.44 is below; many of its items are identical to
3495 those for 4.50. This seems to be the most sensible way to preserve the
3496 historical information.
3502 1. Minor wording change to the doc/README.SIEVE file.
3504 2. Change 4.43/35 introduced a bug: if quota_filecount was set, the
3505 computation of the current number of files was incorrect.
3507 3. Closing a stable door: arrange to panic-die if setitimer() ever fails. The
3508 bug fixed in 4.43/37 would have been diagnosed quickly if this had been in
3511 4. Give more explanation in the error message when the command for a transport
3512 filter fails to execute.
3514 5. There are several places where Exim runs a non-Exim command in a
3515 subprocess. The SIGUSR1 signal should be disabled for these processes. This
3516 was being done only for the command run by the queryprogram router. It is
3517 now done for all such subprocesses. The other cases are: ${run, transport
3518 filters, and the commands run by the lmtp and pipe transports.
3520 6. Added CONFIGURE_GROUP build-time option.
3522 7. Some older OS have a limit of 256 on the maximum number of file
3523 descriptors. Exim was using setrlimit() to set 1000 as a large value
3524 unlikely to be exceeded. Change 4.43/17 caused a lot of logging on these
3525 systems. I've change it so that if it can't get 1000, it tries for 256.
3527 8. "control=submission" was allowed, but had no effect, in a DATA ACL. This
3528 was an oversight, and furthermore, ever since the addition of extra
3529 controls (e.g. 4.43/32), the checks on when to allow different forms of
3530 "control" were broken. There should now be diagnostics for all cases when a
3531 control that does not make sense is encountered.
3533 9. Added the /retain_sender option to "control=submission".
3535 10. $recipients is now available in the predata ACL (oversight).
3537 11. Tidy the search cache before the fork to do a delivery from a message
3538 received from the command line. Otherwise the child will trigger a lookup
3539 failure and thereby defer the delivery if it tries to use (for example) a
3540 cached ldap connection that the parent has called unbind on.
3542 12. If verify=recipient was followed by verify=sender in a RCPT ACL, the value
3543 of $address_data from the recipient verification was clobbered by the
3544 sender verification.
3546 13. The value of address_data from a sender verification is now available in
3547 $sender_address_data in subsequent conditions in the ACL statement.
3549 14. Added forbid_sieve_filter and forbid_exim_filter to the redirect router.
3551 15. Added a new option "connect=<time>" to callout options, to set a different
3554 16. If FIXED_NEVER_USERS was defined, but empty, Exim was assuming the uid 0
3555 was its contents. (It was OK if the option was not defined at all.)
3557 17. A "Completed" log line is now written for messages that are removed from
3558 the spool by the -Mrm option.
3560 18. New variables $sender_verify_failure and $recipient_verify_failure contain
3561 information about exactly what failed.
3563 19. Added -dd to debug only the daemon process.
3565 20. Incorporated Michael Haardt's patch to ldap.c for improving the way it
3566 handles timeouts, both on the server side and network timeouts. Renamed the
3567 CONNECT parameter as NETTIMEOUT (but kept the old name for compatibility).
3569 21. The rare case of EHLO->STARTTLS->HELO was setting the protocol to "smtp".
3570 It is now set to "smtps".
3572 22. $host_address is now set to the target address during the checking of
3573 ignore_target_hosts.
3575 23. When checking ignore_target_hosts for an ipliteral router, no host name was
3576 being passed; this would have caused $sender_host_name to have been used if
3577 matching the list had actually called for a host name (not very likely,
3578 since this list is usually IP addresses). A host name is now passed as
3581 24. Changed the calls that set up the SIGCHLD handler in the daemon to use the
3582 code that specifies a non-restarting handler (typically sigaction() in
3583 modern systems) in an attempt to fix a rare and obscure crash bug.
3585 25. Narrowed the window for a race in the daemon that could cause it to ignore
3586 SIGCHLD signals. This is not a major problem, because they are used only to
3587 wake it up if nothing else does.
3589 26. A malformed maildirsize file could cause Exim to calculate negative values
3590 for the mailbox size or file count. Odd effects could occur as a result.
3591 The maildirsize information is now recalculated if the size or filecount
3594 27. Added HAVE_SYS_STATVFS_H to the os.h file for Linux, as it has had this
3595 support for a long time. Removed HAVE_SYS_VFS_H.
3597 28. Installed the latest version of exipick from John Jetmore.
3599 29. In an address list, if the pattern was not a regular expression, an empty
3600 subject address (from a bounce message) matched only if the pattern was an
3601 empty string. Non-empty patterns were not even tested. This was the wrong
3602 because it is perfectly reasonable to use an empty address as part of a
3603 database query. An empty address is now tested by patterns that are
3604 lookups. However, all the other forms of pattern expect the subject to
3605 contain a local part and a domain, and therefore, for them, an empty
3606 address still always fails if the pattern is not itself empty.
3608 30. Exim went into a mad DNS loop when attempting to do a callout where the
3609 host was specified on an smtp transport, and looking it up yielded more
3610 than one IP address.
3612 31. Re-factored the code for checking spool and log partition space into a
3613 function that finds that data and another that does the check. The former
3614 is then used to implement four new variables: $spool_space, $log_space,
3615 $spool_inodes, and $log_inodes.
3617 32. The RFC2047 encoding function was originally intended for short strings
3618 such as real names; it was not keeping to the 75-character limit for
3619 encoded words that the RFC imposes. It now respects the limit, and
3620 generates multiple encoded words if necessary. To be on the safe side, I
3621 have increased the buffer size for the ${rfc2047: expansion operator from
3624 33. It is now permitted to omit both strings after an "if" condition; if the
3625 condition is true, the result is "true". As before, when the second string
3626 is omitted, a false condition yields an empty string. This makes it less
3627 cumbersome to write custom ACL and router conditions.
3629 34. Failure to deliver a bounce message always caused it to be frozen, even if
3630 there was an errors_to setting on the router. The errors_to setting is now
3633 35. If an IPv6 address is given for -bh or -bhc, it is now converted to the
3634 canonical form (fully expanded) before being placed in
3635 $sender_host_address.
3637 36. The table in the code that translates DNS record types into text (T_A to
3638 "A" for instance) was missing entries for NS and CNAME. It is just possible
3639 that this could have caused confusion if both these types were looked up
3640 for the same domain, because the text type is used as part of Exim's
3641 per-process caching. But the chance of anyone hitting this buglet seems
3644 37. The dnsdb lookup has been extended in a number of ways.
3646 (1) There is a new type, "zns", which walks up the domain tree until it
3647 finds some nameserver records. It should be used with care.
3649 (2) There is a new type, "mxh", which is like "mx" except that it returns
3650 just the host names, not the priorities.
3652 (3) It is now possible to give a list of domains (or IP addresses) to be
3653 looked up. The behaviour when one of the lookups defers can be
3654 controlled by a keyword.
3656 (4) It is now possible to specify the separator character for use when
3657 multiple records are returned.
3659 38. The dnslists ACL condition has been extended: it is now possible to supply
3660 a list of IP addresses and/or domains to be looked up in a particular DNS
3663 39. Added log_selector=+queue_time_overall.
3665 40. When running the queue in the test harness, wait just a tad after forking a
3666 delivery process, to get repeatability of debugging output.
3668 41. Include certificate and key file names in error message when GnuTLS fails
3669 to set them up, because the GnuTLS error message doesn't include the name
3670 of the failing file when there is a problem reading it.
3672 42. Allow both -bf and -bF in the same test run.
3674 43. Did the same fix as 41 above for OpenSSL, which had the same infelicity.
3676 44. The "Exiscan patch" is now merged into the mainline Exim source.
3678 45. Sometimes the final signoff response after QUIT could fail to get
3679 transmitted in the non-TLS case. Testing !tls_active instead of tls_active
3680 < 0 before doing a fflush(). This bug looks as though it goes back to the
3681 introduction of TLS in release 3.20, but "sometimes" must have been rare
3682 because the tests only now provoked it.
3684 46. Reset the locale to "C" after calling embedded Perl, in case it was changed
3685 (this can affect the format of dates).
3687 47. exim_tidydb, when checking for the continued existence of a message for
3688 which it has found a message-specific retry record, was not finding
3689 messages that were in split spool directories. Consequently, it was
3690 deleting retry records that should have stayed in existence.
3692 48. Steve fixed some bugs in eximstats.
3694 49. The SPA authentication driver was not abandoning authentication and moving
3695 on to the next authenticator when an expansion was forced to fail,
3696 contradicting the general specification for all authenticators. Instead it
3697 was generating a temporary error. It now behaves as specified.
3699 50. The default ordering of permitted cipher suites for GnuTLS was pessimal
3700 (the order specifies the preference for clients). The order is now AES256,
3701 AES128, 3DES, ARCFOUR128.
3703 51. Small patch to Sieve code - explicitly set From: when generating an
3706 52. Exim crashed if a remote delivery caused a very long error message to be
3707 recorded - for instance if somebody sent an entire SpamAssassin report back
3708 as a large number of 550 error lines. This bug was coincidentally fixed by
3709 increasing the size of one of Exim's internal buffers (big_buffer) that
3710 happened as part of the Exiscan merge. However, to be on the safe side, I
3711 have made the code more robust (and fixed the comments that describe what
3714 53. Now that there can be additional text after "Completed" in log lines (if
3715 the queue_time_overall log selector is set), a one-byte patch to exigrep
3716 was needed to allow it to recognize "Completed" as not the last thing in
3719 54. The LDAP lookup was not handling a return of LDAP_RES_SEARCH_REFERENCE. A
3720 patch that reportedly fixes this has been added. I am not expert enough to
3721 create a test for it. This is what the patch creator wrote:
3723 "I found a little strange behaviour of ldap code when working with
3724 Windows 2003 AD Domain, where users was placed in more than one
3725 Organization Units. When I tried to give exim partial DN, the exit code
3726 of ldap_search was unknown to exim because of LDAP_RES_SEARCH_REFERENCE.
3727 But simultaneously result of request was absolutely normal ldap result,
3728 so I produce this patch..."
3730 Later: it seems that not all versions of LDAP support LDAP_RES_SEARCH_
3731 REFERENCE, so I have modified the code to exclude the patch when that macro
3734 55. Some experimental protocols are using DNS PTR records for new purposes. The
3735 keys for these records are domain names, not reversed IP addresses. The
3736 dnsdb PTR lookup now tests whether its key is an IP address. If not, it
3737 leaves it alone. Component reversal etc. now happens only for IP addresses.
3740 56. Improve error message when ldap_search() fails in OpenLDAP or Solaris LDAP.
3742 57. Double the size of the debug message buffer (to 2048) so that more of very
3743 long debug lines gets shown.
3745 58. The exicyclog utility now does better if the number of log files to keep
3746 exceeds 99. In this case, it numbers them 001, 002 ... instead of 01, 02...
3748 59. Two changes related to the smtp_active_hostname option:
3750 (1) $smtp_active_hostname is now available as a variable.
3751 (2) The default for smtp_banner uses $smtp_active_hostname instead
3752 of $primary_hostname.
3754 60. The host_aton() function is supposed to be passed a string that is known
3755 to be a valid IP address. However, in the case of IPv6 addresses, it was
3756 not checking this. This is a hostage to fortune. Exim now panics and dies
3757 if the condition is not met. A case was found where this could be provoked
3758 from a dnsdb PTR lookup with an IPv6 address that had more than 8
3759 components; fortuitously, this particular loophole had already been fixed
3760 by change 4.50/55 above.
3762 If there are any other similar loopholes, the new check in host_aton()
3763 itself should stop them being exploited. The report I received stated that
3764 data on the command line could provoke the exploit when Exim was running as
3765 exim, but did not say which command line option was involved. All I could
3766 find was the use of -be with a bad dnsdb PTR lookup, and in that case it is
3767 running as the user.
3770 61. There was a buffer overflow vulnerability in the SPA authentication code
3771 (which came originally from the Samba project). I have added a test to the
3772 spa_base64_to_bits() function which I hope fixes it.
3775 62. Configuration update for GNU/Hurd and variations. Updated Makefile-GNU and
3776 os.h-GNU, and added configuration files for GNUkFreeBSD and GNUkNetBSD.
3778 63. The daemon start-up calls getloadavg() while still root for those OS that
3779 need the first call to be done as root, but it missed one case: when
3780 deliver_queue_load_max is set with deliver_drop_privilege. This is
3781 necessary for the benefit of the queue runner, because there is no re-exec
3782 when deliver_drop_privilege is set.
3784 64. A call to exiwhat cut short delays set up by "delay" modifiers in ACLs.
3785 This has been fixed.
3787 65. Caching of lookup data for "hosts =" ACL conditions, when a named host list
3788 was in use, was not putting the data itself into the right store pool;
3789 consequently, it could be overwritten for a subsequent message in the same
3790 SMTP connection. (Fix 4.40/11 dealt with the non-cache case, but overlooked
3793 66. Added hosts_max_try_hardlimit to the smtp transport, default 50.
3795 67. The string_is_ip_address() function returns 0, 4, or 6, for "no an IP
3796 address", "IPv4 address", and "IPv6 address", respectively. Some calls of
3797 the function were treating the return as a boolean value, which happened to
3798 work because 0=false and not-0=true, but is not correct code.
3800 68. The host_aton() function was not handling scoped IPv6 addresses (those
3801 with, for example, "%eth0" on the end) correctly.
3803 69. Fixed some compiler warnings in acl.c for the bitmaps specified with
3804 negated items (that is, ~something) in unsigned ints. Some compilers
3805 apparently mutter when there is no cast.
3807 70. If an address verification called from an ACL failed, and did not produce a
3808 user-specific message (i.e. there was only a "system" message), nothing was
3809 put in $acl_verify_message. In this situation, it now puts the system
3812 71. Change 4.23/11 added synchronization checking at the start of an SMTP
3813 session; change 4.31/43 added the unwanted input to the log line - except
3814 that it did not do this in the start of session case. It now does.
3816 72. After a timeout in a callout SMTP session, Exim still sent a QUIT command.
3817 This is wrong and can cause the other end to generate a synchronization
3818 error if it is another Exim or anything else that does the synchronization
3819 check. A QUIT command is no longer sent after a timeout.
3821 73. $host_lookup_deferred has been added, to make it easier to detect DEFERs
3822 during host lookups.
3824 74. The defer_ok option of callout verification was not working if it was used
3825 when verifying addresses in header lines, that is, for this case:
3827 verify = header_sender/callout=defer_ok
3829 75. A backgrounded daemon closed stdin/stdout/stderr on entry; this meant that
3830 those file descriptors could be used for SMTP connections. If anything
3831 wrote to stderr (the example that came up was "warn" in embedded Perl), it
3832 could be sent to the SMTP client, causing chaos. The daemon now opens
3833 stdin, stdout, and stderr to /dev/null when it puts itself into the
3836 76. Arrange for output from Perl's "warn" command to be written to Exim's main
3837 log by default. The user can override this with suitable Perl magic.
3839 77. The use of log_message on a "discard" ACL verb, which is supposed to add to
3840 the log message when discard triggers, was not working for the DATA ACL or
3841 for the non-SMTP ACL.
3843 78. Error message wording change in sieve.c.
3845 79. If smtp_accept_max_per_host was set, the number of connections could be
3846 restricted to fewer than expected, because the daemon was trying to set up
3847 a new connection before checking whether the processes handling previous
3848 connections had finished. The check for completed processes is now done
3849 earlier. On busy systems, this bug wouldn't be noticed because something
3850 else would have woken the daemon, and it would have reaped the completed
3853 80. If a message was submitted locally by a user whose login name contained one
3854 or more spaces (ugh!), the spool file that Exim wrote was not re-readable.
3855 It caused a spool format error. I have fixed the spool reading code. A
3856 related problem was that the "from" clause in the Received: line became
3857 illegal because of the space(s). It is now covered by ${quote_local_part.
3859 81. Included the latest eximstats from Steve (adds average sizes to HTML Top
3862 82. Updated OS/Makefile-AIX as per message from Mike Meredith.
3864 83. Patch from Sieve maintainer to fix unterminated string problem in
3865 "vacation" handling.
3867 84. Some minor changes to the Linux configuration files to help with other
3868 OS variants using glibc.
3870 85. One more patch for Sieve to update vacation handling to latest spec.
3873 ----------------------------------------------------
3874 See the note above about the 4.44 and 4.50 releases.
3875 ----------------------------------------------------
3881 1. Change 4.43/35 introduced a bug that caused file counts to be
3882 incorrectly computed when quota_filecount was set in an appendfile
3885 2. Closing a stable door: arrange to panic-die if setitimer() ever fails. The
3886 bug fixed in 4.43/37 would have been diagnosed quickly if this had been in
3889 3. Give more explanation in the error message when the command for a transport
3890 filter fails to execute.
3892 4. There are several places where Exim runs a non-Exim command in a
3893 subprocess. The SIGUSR1 signal should be disabled for these processes. This
3894 was being done only for the command run by the queryprogram router. It is
3895 now done for all such subprocesses. The other cases are: ${run, transport
3896 filters, and the commands run by the lmtp and pipe transports.
3898 5. Some older OS have a limit of 256 on the maximum number of file
3899 descriptors. Exim was using setrlimit() to set 1000 as a large value
3900 unlikely to be exceeded. Change 4.43/17 caused a lot of logging on these
3901 systems. I've change it so that if it can't get 1000, it tries for 256.
3903 6. "control=submission" was allowed, but had no effect, in a DATA ACL. This
3904 was an oversight, and furthermore, ever since the addition of extra
3905 controls (e.g. 4.43/32), the checks on when to allow different forms of
3906 "control" were broken. There should now be diagnostics for all cases when a
3907 control that does not make sense is encountered.
3909 7. $recipients is now available in the predata ACL (oversight).
3911 8. Tidy the search cache before the fork to do a delivery from a message
3912 received from the command line. Otherwise the child will trigger a lookup
3913 failure and thereby defer the delivery if it tries to use (for example) a
3914 cached ldap connection that the parent has called unbind on.
3916 9. If verify=recipient was followed by verify=sender in a RCPT ACL, the value
3917 of $address_data from the recipient verification was clobbered by the
3918 sender verification.
3920 10. If FIXED_NEVER_USERS was defined, but empty, Exim was assuming the uid 0
3921 was its contents. (It was OK if the option was not defined at all.)
3923 11. A "Completed" log line is now written for messages that are removed from
3924 the spool by the -Mrm option.
3926 12. $host_address is now set to the target address during the checking of
3927 ignore_target_hosts.
3929 13. When checking ignore_target_hosts for an ipliteral router, no host name was
3930 being passed; this would have caused $sender_host_name to have been used if
3931 matching the list had actually called for a host name (not very likely,
3932 since this list is usually IP addresses). A host name is now passed as
3935 14. Changed the calls that set up the SIGCHLD handler in the daemon to use the
3936 code that specifies a non-restarting handler (typically sigaction() in
3937 modern systems) in an attempt to fix a rare and obscure crash bug.
3939 15. Narrowed the window for a race in the daemon that could cause it to ignore
3940 SIGCHLD signals. This is not a major problem, because they are used only to
3941 wake it up if nothing else does.
3943 16. A malformed maildirsize file could cause Exim to calculate negative values
3944 for the mailbox size or file count. Odd effects could occur as a result.
3945 The maildirsize information is now recalculated if the size or filecount
3948 17. Added HAVE_SYS_STATVFS_H to the os.h file for Linux, as it has had this
3949 support for a long time. Removed HAVE_SYS_VFS_H.
3951 18. Updated exipick to current release from John Jetmore.
3953 19. Allow an empty sender to be matched against a lookup in an address list.
3954 Previously the only cases considered were a regular expression, or an
3957 20. Exim went into a mad DNS lookup loop when doing a callout where the
3958 host was specified on the transport, if the DNS lookup yielded more than
3961 21. The RFC2047 encoding function was originally intended for short strings
3962 such as real names; it was not keeping to the 75-character limit for
3963 encoded words that the RFC imposes. It now respects the limit, and
3964 generates multiple encoded words if necessary. To be on the safe side, I
3965 have increased the buffer size for the ${rfc2047: expansion operator from
3968 22. Failure to deliver a bounce message always caused it to be frozen, even if
3969 there was an errors_to setting on the router. The errors_to setting is now
3972 23. If an IPv6 address is given for -bh or -bhc, it is now converted to the
3973 canonical form (fully expanded) before being placed in
3974 $sender_host_address.
3976 24. Updated eximstats to version 1.33
3978 25. Include certificate and key file names in error message when GnuTLS fails
3979 to set them up, because the GnuTLS error message doesn't include the name
3980 of the failing file when there is a problem reading it.
3982 26. Expand error message when OpenSSL has problems setting up cert/key files.
3985 27. Reset the locale to "C" after calling embedded Perl, in case it was changed
3986 (this can affect the format of dates).
3988 28. exim_tidydb, when checking for the continued existence of a message for
3989 which it has found a message-specific retry record, was not finding
3990 messages that were in split spool directories. Consequently, it was
3991 deleting retry records that should have stayed in existence.
3993 29. eximstats updated to version 1.35
3994 1.34 - allow eximstats to parse syslog lines as well as mainlog lines
3995 1.35 - bugfix such that pie charts by volume are generated correctly
3997 30. The SPA authentication driver was not abandoning authentication and moving
3998 on to the next authenticator when an expansion was forced to fail,
3999 contradicting the general specification for all authenticators. Instead it
4000 was generating a temporary error. It now behaves as specified.
4002 31. The default ordering of permitted cipher suites for GnuTLS was pessimal
4003 (the order specifies the preference for clients). The order is now AES256,
4004 AES128, 3DES, ARCFOUR128.
4006 31. Small patch to Sieve code - explicitly set From: when generating an
4009 32. Exim crashed if a remote delivery caused a very long error message to be
4010 recorded - for instance if somebody sent an entire SpamAssassin report back
4011 as a large number of 550 error lines. This bug was coincidentally fixed by
4012 increasing the size of one of Exim's internal buffers (big_buffer) that
4013 happened as part of the Exiscan merge. However, to be on the safe side, I
4014 have made the code more robust (and fixed the comments that describe what
4017 33. Some experimental protocols are using DNS PTR records for new purposes. The
4018 keys for these records are domain names, not reversed IP addresses. The
4019 dnsdb PTR lookup now tests whether its key is an IP address. If not, it
4020 leaves it alone. Component reversal etc. now happens only for IP addresses.
4023 34. The host_aton() function is supposed to be passed a string that is known
4024 to be a valid IP address. However, in the case of IPv6 addresses, it was
4025 not checking this. This is a hostage to fortune. Exim now panics and dies
4026 if the condition is not met. A case was found where this could be provoked
4027 from a dnsdb PTR lookup with an IPv6 address that had more than 8
4028 components; fortuitously, this particular loophole had already been fixed
4029 by change 4.50/55 or 4.44/33 above.
4031 If there are any other similar loopholes, the new check in host_aton()
4032 itself should stop them being exploited. The report I received stated that
4033 data on the command line could provoke the exploit when Exim was running as
4034 exim, but did not say which command line option was involved. All I could
4035 find was the use of -be with a bad dnsdb PTR lookup, and in that case it is
4036 running as the user.
4039 35. There was a buffer overflow vulnerability in the SPA authentication code
4040 (which came originally from the Samba project). I have added a test to the
4041 spa_base64_to_bits() function which I hope fixes it.
4044 36. The daemon start-up calls getloadavg() while still root for those OS that
4045 need the first call to be done as root, but it missed one case: when
4046 deliver_queue_load_max is set with deliver_drop_privilege. This is
4047 necessary for the benefit of the queue runner, because there is no re-exec
4048 when deliver_drop_privilege is set.
4050 37. Caching of lookup data for "hosts =" ACL conditions, when a named host list
4051 was in use, was not putting the data itself into the right store pool;
4052 consequently, it could be overwritten for a subsequent message in the same
4053 SMTP connection. (Fix 4.40/11 dealt with the non-cache case, but overlooked
4056 38. Sometimes the final signoff response after QUIT could fail to get
4057 transmitted in the non-TLS case. Testing !tls_active instead of tls_active
4058 < 0 before doing a fflush(). This bug looks as though it goes back to the
4059 introduction of TLS in release 3.20, but "sometimes" must have been rare
4060 because the tests only now provoked it.
4066 1. Fixed a longstanding but relatively impotent bug: a long time ago, before
4067 PIPELINING, the function smtp_write_command() used to return TRUE or FALSE.
4068 Now it returns an integer. A number of calls were still expecting a T/F
4069 return. Fortuitously, in all cases, the tests worked in OK situations,
4070 which is the norm. However, things would have gone wrong on any write
4071 failures on the smtp file descriptor. This function is used when sending
4072 messages over SMTP and also when doing verify callouts.
4074 2. When Exim is called to do synchronous delivery of a locally submitted
4075 message (the -odf or -odi options), it no longer closes stderr before doing
4078 3. Implemented the mua_wrapper option.
4080 4. Implemented mx_fail_domains and srv_fail_domains for the dnslookup router.
4082 5. Implemented the functions header_remove(), header_testname(),
4083 header_add_at_position(), and receive_remove_recipient(), and exported them
4086 6. If an ACL "warn" statement specified the addition of headers, Exim already
4087 inserted X-ACL-Warn: at the start if there was no header name. However, it
4088 was not making this test for the second and subsequent header lines if
4089 there were newlines in the string. This meant that an invalid header could
4090 be inserted if Exim was badly configured.
4092 7. Allow an ACL "warn" statement to add header lines at the start or after all
4093 the Received: headers, as well as at the end.
4095 8. Added the rcpt_4xx retry error code.
4097 9. Added postmaster_mailfrom=xxx to callout verification option.
4099 10. Added mailfrom=xxxx to the callout verification option, for verify=
4102 11. ${substr_1_:xxxx} and ${substr__3:xxxx} are now diagnosed as syntax errors
4103 (they previously behaved as ${substr_1_0:xxxx} and ${substr:_0_3:xxxx}).
4105 12. Inserted some casts to stop certain compilers warning when using pointer
4106 differences as field lengths or precisions in printf-type calls (mostly
4107 affecting debugging statements).
4109 13. Added optional readline() support for -be (dynamically loaded).
4111 14. Obscure bug fix: if a message error (e.g. 4xx to MAIL) happened within the
4112 same clock tick as a message's arrival, so that its received time was the
4113 same as the "first fail" time on the retry record, and that message
4114 remained on the queue past the ultimate address timeout, every queue runner
4115 would try a delivery (because it was past the ultimate address timeout) but
4116 after another failure, the ultimate address timeout, which should have then
4117 bounced the address, did not kick in. This was a "< instead of <=" error;
4118 in most cases the first failure would have been in the next clock tick
4119 after the received time, and all would be well.
4121 15. The special items beginning with @ in domain lists (e.g. @mx_any) were not
4122 being recognized when the domain list was tested by the match_domain
4123 condition in an expansion string.
4125 16. Added the ${str2b64: operator.
4127 17. Exim was always calling setrlimit() to set a large limit for the number of
4128 processes, without checking whether the existing limit was already
4129 adequate. (It did check for the limit on file descriptors.) Furthermore,
4130 errors from getrlimit() and setrlimit() were being ignored. Now they are
4131 logged to the main and panic logs, but Exim does carry on, to try to do its
4132 job under whatever limits there are.
4134 18. Imported PCRE 5.0.
4136 19. Trivial typo in log message " temporarily refused connection" (the leading
4139 20. If the log selector return_path_on_delivery was set and an address was
4140 redirected to /dev/null, the delivery process crashed because it assumed
4141 that a return path would always be set for a "successful" delivery. In this
4142 case, the whole delivery is bypassed as an optimization, and therefore no
4145 21. Internal re-arrangement: the function for sending a challenge and reading
4146 a response while authentication was assuming a zero-terminated challenge
4147 string. It's now changed to take a pointer and a length, to allow for
4148 binary data in such strings.
4150 22. Added the cyrus_sasl authenticator (code supplied by MBM).
4152 23. Exim was not respecting finduser_retries when seeking the login of the
4153 uid under which it was called; it was always trying 10 times. (The default
4154 setting of finduser_retries is zero.) Also, it was sleeping after the final
4155 failure, which is pointless.
4157 24. Implemented tls_on_connect_ports.
4159 25. Implemented acl_smtp_predata.
4161 26. If the domain in control=submission is set empty, Exim assumes that the
4162 authenticated id is a complete email address when it generates From: or
4163 Sender: header lines.
4165 27. Added "#define SOCKLEN_T int" to OS/os.h-SCO and OS/os.h-SCO_SV. Also added
4166 definitions to OS/Makefile-SCO and OS/Makefile-SCO_SV that put basename,
4167 chown and chgrp in /bin and hostname in /usr/bin.
4169 28. Exim was keeping the "process log" file open after each use, just as it
4170 does for the main log. This opens the possibility of it remaining open for
4171 long periods when the USR1 signal hits a daemon. Occasional processlog
4172 errors were reported, that could have been caused by this. Anyway, it seems
4173 much more sensible not to leave this file open at all, so that is what now
4176 29. The long-running daemon process does not normally write to the log once it
4177 has entered its main loop, and it closes the log before doing so. This is
4178 so that log files can straightforwardly be renamed and moved. However,
4179 there are a couple of unusual error situations where the daemon does write
4180 log entries, and I had neglected to close the log afterwards.
4182 30. The text of an SMTP error response that was received during a remote
4183 delivery was being truncated at 512 bytes. This is too short for some of
4184 the long messages that one sometimes sees. I've increased the limit to
4187 31. It is now possible to make retry rules that apply only when a message has a
4188 specific sender, in particular, an empty sender.
4190 32. Added "control = enforce_sync" and "control = no_enforce_sync". This makes
4191 it possible to be selective about when SMTP synchronization is enforced.
4193 33. Added "control = caseful_local_part" and "control = "caselower_local_part".
4195 32. Implemented hosts_connection_nolog.
4197 33. Added an ACL for QUIT.
4199 34. Setting "delay_warning=" to disable warnings was not working; it gave a
4202 35. Added mailbox_size and mailbox_filecount to appendfile.
4204 36. Added control = no_multiline_responses to ACLs.
4206 37. There was a bug in the logic of the code that waits for the clock to tick
4207 in the case where the clock went backwards by a substantial amount such
4208 that the microsecond fraction of "now" was more than the microsecond
4209 fraction of "then" (but the whole seconds number was less).
4211 38. Added support for the libradius Radius client library this is found on
4212 FreeBSD (previously only the radiusclient library was supported).
4218 1. When certain lookups returned multiple values in the form name=value, the
4219 quoting of the values was not always being done properly. Specifically:
4220 (a) If the value started with a double quote, but contained no whitespace,
4222 (b) If the value contained whitespace other than a space character (i.e.
4223 tabs or newlines or carriage returns) it was not quoted.
4224 This fix has been applied to the mysql and pgsql lookups by writing a
4225 separate quoting function and calling it from the lookup code. The fix
4226 should probably also be applied to nisplus, ibase and oracle lookups, but
4227 since I cannot test any of those, I have not disturbed their existing code.
4229 2. A hit in the callout cache for a specific address caused a log line with no
4230 reason for rejecting RCPT. Now it says "Previous (cached) callout
4231 verification failure".
4233 3. There was an off-by-one bug in the queryprogram router. An over-long
4234 return line was truncated at 256 instead of 255 characters, thereby
4235 overflowing its buffer with the terminating zero. As well as fixing this, I
4236 have increased the buffer size to 1024 (and made a note to document this).
4238 4. If an interrupt, such as the USR1 signal that is send by exiwhat, arrives
4239 when Exim is waiting for an SMTP response from a remote server, Exim
4240 restarts its select() call on the socket, thereby resetting its timeout.
4241 This is not a problem when such interrupts are rare. Somebody set up a cron
4242 job to run exiwhat every 2 minutes, which is less than the normal select()
4243 timeout (5 or 10 minutes). This meant that the select() timeout never
4244 kicked in because it was always reset. I have fixed this by comparing the
4245 time when an interrupt arrives with the time at the start of the first call
4246 to select(). If more time than the timeout has elapsed, the interrupt is
4247 treated as a timeout.
4249 5. Some internal re-factoring in preparation for the addition of Sieve
4250 extensions (by MH). In particular, the "personal" test is moved to a
4251 separate function, and given an option for scanning Cc: and Bcc: (which is
4252 not set for Exim filters).
4254 6. When Exim created an email address using the login of the caller as the
4255 local part (e.g. when creating a From: or Sender: header line), it was not
4256 quoting the local part when it contained special characters such as @.
4258 7. Installed new OpenBSD configuration files.
4260 8. Reworded some messages for syntax errors in "and" and "or" conditions to
4261 try to make them clearer.
4263 9. Callout options, other than the timeout value, were being ignored when
4264 verifying sender addresses in header lines. For example, when using
4266 verify = header_sender/callout=no_cache
4268 the cache was (incorrectly) being used.
4270 10. Added a missing instance of ${EXE} to the exim_install script; this affects
4271 only the Cygwin environment.
4273 11. When return_path_on_delivery was set as a log selector, if different remote
4274 addresses in the same message used different return paths and parallel
4275 remote delivery occurred, the wrong values would sometimes be logged.
4276 (Whenever a remote delivery process finished, the return path value from
4277 the most recently started remote delivery process was logged.)
4279 12. RFC 3848 specifies standard names for the "with" phrase in Received: header
4280 lines when AUTH and/or TLS are in use. This is the "received protocol"
4281 field. Exim used to use "asmtp" for authenticated SMTP, without any
4282 indication (in the protocol name) for TLS use. Now it follows the RFC and
4283 uses "esmtpa" if the connection is authenticated, "esmtps" if it is
4284 encrypted, and "esmtpsa" if it is both encrypted and authenticated. These
4285 names appear in log lines as well as in Received: header lines.
4287 13. Installed MH's patches for Sieve to add the "copy" and "vacation"
4288 extensions, and comparison tests, and to fix some bugs.
4290 14. Changes to the "personal" filter test:
4292 (1) The test was buggy in that it was just doing the equivalent of
4293 "contains" tests on header lines. For example, if a user's address was
4294 anne@some.where, the "personal" test would incorrectly be true for
4296 To: susanne@some.where
4298 This test is now done by extracting each address from the header in turn,
4299 and checking the entire address. Other tests that are part of "personal"
4300 are now done using regular expressions (for example, to check local parts
4301 of addresses in From: header lines).
4303 (2) The list of non-personal local parts in From: addresses has been
4304 extended to include "listserv", "majordomo", "*-request", and "owner-*",
4305 taken from the Sieve specification recommendations.
4307 (3) If the message contains any header line starting with "List-" it is
4308 treated as non-personal.
4310 (4) The test for "circular" in the Subject: header line has been removed
4311 because it now seems ill-conceived.
4313 15. Minor typos in src/EDITME comments corrected.
4315 16. Installed latest exipick from John Jetmore.
4317 17. If headers_add on a router specified a text string that was too long for
4318 string_sprintf() - that is, longer than 8192 bytes - Exim panicked. The use
4319 of string_sprintf() is now avoided.
4321 18. $message_body_size was not set (it was always zero) when running the DATA
4322 ACL and the local_scan() function.
4324 19. For the "mail" command in an Exim filter, no default was being set for
4325 the once_repeat time, causing a random time value to be used if "once" was
4326 specified. (If the value happened to be <= 0, no repeat happened.) The
4327 default is now 0s, meaning "never repeat". The "vacation" command was OK
4328 (its default is 7d). It's somewhat surprising nobody ever noticed this bug
4329 (I found it when inspecting the code).
4331 20. There is now an overall timeout for performing a callout verification. It
4332 defaults to 4 times the callout timeout, which applies to individual SMTP
4333 commands during the callout. The overall timeout applies when there is more
4334 than one host that can be tried. The timeout is checked before trying the
4335 next host. This prevents very long delays if there are a large number of
4336 hosts and all are timing out (e.g. when the network connections are timing
4337 out). The value of the overall timeout can be changed by specifying an
4338 additional sub-option for "callout", called "maxwait". For example:
4340 verify = sender/callout=5s,maxwait=20s
4342 21. Add O_APPEND to the open() call for maildirsize files (Exim already seeks
4343 to the end before writing, but this should make it even safer).
4345 22. Exim was forgetting that it had advertised PIPELINING for the second and
4346 subsequent messages on an SMTP connection. It was also not resetting its
4347 memory on STARTTLS and an internal HELO.
4349 23. When Exim logs an SMTP synchronization error within a session, it now
4350 records whether PIPELINING has been advertised or not.
4352 24. Added 3 instances of "(long int)" casts to time_t variables that were being
4353 formatted using %ld, because on OpenBSD (and perhaps others), time_t is int
4354 rather than long int.
4356 25. Installed the latest Cygwin configuration files from the Cygwin maintainer.
4358 26. Added the never_mail option to autoreply.
4364 1. A reorganization of the code in order to implement 4.40/8 caused a daemon
4365 crash if the getsockname() call failed; this can happen if a connection is
4366 closed very soon after it is established. The problem was simply in the
4367 order in which certain operations were done, causing Exim to try to write
4368 to the SMTP stream before it had set up the file descriptor. The bug has
4369 been fixed by making things happen in the correct order.
4375 1. If "drop" was used in a DATA ACL, the SMTP output buffer was not flushed
4376 before the connection was closed, thus losing the rejection response.
4378 2. Commented out the definition of SOCKLEN_T in os.h-SunOS5. It is needed for
4379 some early Solaris releases, but causes trouble in current releases where
4380 socklen_t is defined.
4382 3. When std{in,out,err} are closed, re-open them to /dev/null so that they
4385 4. Minor refactoring of os.c-Linux to avoid compiler warning when IPv6 is not
4388 5. Refactoring in expand.c to improve memory usage. Pre-allocate a block so
4389 that releasing the top of it at the end releases what was used for sub-
4390 expansions (unless the block got too big). However, discard this block if
4391 the first thing is a variable or header, so that we can use its block when
4392 it is dynamic (useful for very large $message_headers, for example).
4394 6. Lookups now cache *every* query, not just the most recent. A new, separate
4395 store pool is used for this. It can be recovered when all lookup caches are
4396 flushed. Lookups now release memory at the end of their result strings.
4397 This has involved some general refactoring of the lookup sources.
4399 7. Some code has been added to the store_xxx() functions to reduce the amount
4400 of flapping under certain conditions.
4402 8. log_incoming_interface used to affect only the <= reception log lines. Now
4403 it causes the local interface and port to be added to several more SMTP log
4404 lines, for example "SMTP connection from", and rejection lines.
4406 9. The Sieve author supplied some patches for the doc/README.SIEVE file.
4408 10. Added a conditional definition of _BSD_SOCKLEN_T to os.h-Darwin.
4410 11. If $host_data was set by virtue of a hosts lookup in an ACL, its value
4411 could be overwritten at the end of the current message (or the start of a
4412 new message if it was set in a HELO ACL). The value is now preserved for
4413 the duration of the SMTP connection.
4415 12. If a transport had a headers_rewrite setting, and a matching header line
4416 contained an unqualified address, that address was qualified, even if it
4417 did not match any rewriting rules. The underlying bug was that the values
4418 of the flags that permit the existence of unqualified sender and recipient
4419 addresses in header lines (set by {sender,recipient}_unqualified_hosts for
4420 non-local messages, and by -bnq for local messages) were not being
4421 preserved with the message after it was received.
4423 13. When Exim was logging an SMTP synchronization error, it could sometimes log
4424 "next input=" as part of the text comprising the host identity instead of
4425 the correct text. The code was using the same buffer for two different
4426 strings. However, depending on which order the printing function evaluated
4427 its arguments, the bug did not always show up. Under Linux, for example, my
4428 test suite worked just fine.
4430 14. Exigrep contained a use of Perl's "our" scoping after change 4.31/70. This
4431 doesn't work with some older versions of Perl. It has been changed to "my",
4432 which in any case is probably the better facility to use.
4434 15. A really picky compiler found some instances of statements for creating
4435 error messages that either had too many or two few arguments for the format
4438 16. The size of the buffer for calls to the DNS resolver has been increased
4439 from 1024 to 2048. A larger buffer is needed when performing PTR lookups
4440 for addresses that have a lot of PTR records. This alleviates a problem; it
4441 does not fully solve it.
4443 17. A dnsdb lookup for PTR records that receives more data than will fit in the
4444 buffer now truncates the list and logs the incident, which is the same
4445 action as happens when Exim is looking up a host name and its aliases.
4446 Previously in this situation something unpredictable would happen;
4447 sometimes it was "internal error: store_reset failed".
4449 18. If a server dropped the connection unexpectedly when an Exim client was
4450 using GnuTLS and trying to read a response, the client delivery process
4451 crashed while trying to generate an error log message.
4453 19. If a "warn" verb in an ACL added multiple headers to a message in a single
4454 string, for example:
4456 warn message = H1: something\nH2: something
4458 the text was added as a single header line from Exim's point of view
4459 though it ended up OK in the delivered message. However, searching for the
4460 second and subsequent header lines using $h_h2: did not work. This has been
4461 fixed. Similarly, if a system filter added multiple headers in this way,
4462 the routers could not see them.
4464 20. Expanded the error message when iplsearch is called with an invalid key to
4465 suggest using net-iplsearch in a host list.
4467 21. When running tests using -bh, any delays imposed by "delay" modifiers in
4468 ACLs are no longer actually imposed (and a message to that effect is
4471 22. If a "gecos" field in a passwd entry contained escaped characters, in
4472 particular, if it contained a \" sequence, Exim got it wrong when building
4473 a From: or a Sender: header from that name. A second bug also caused
4474 incorrect handling when an unquoted " was present following a character
4475 that needed quoting.
4477 23. "{crypt}" as a password encryption mechanism for a "crypteq" expansion item
4478 was not being matched caselessly.
4480 24. Arranged for all hyphens in the exim.8 source to be escaped with
4483 25. Change 16 of 4.32, which reversed 71 or 4.31 didn't quite do the job
4484 properly. Recipient callout cache records were still being keyed to include
4485 the sender, even when use_sender was set false. This led to far more
4486 callouts that were necessary. The sender is no longer included in the key
4487 when use_sender is false.
4489 26. Added "control = submission" modifier to ACLs.
4491 27. Added the ${base62d: operator to decode base 62 numbers.
4493 28. dnsdb lookups can now access SRV records.
4495 29. CONFIGURE_OWNER can be set at build time to define an alternative owner for
4496 the configuration file.
4498 30. The debug message "delivering xxxxxx-xxxxxx-xx" is now output in verbose
4499 (-v) mode. This makes the output for a verbose queue run more intelligible.
4501 31. Added a use_postmaster feature to recipient callouts.
4503 32. Added the $body_zerocount variable, containing the number of binary zero
4504 bytes in the message body.
4506 33. The time of last modification of the "new" subdirectory is now used as the
4507 "mailbox time last read" when there is a quota error for a maildir
4510 34. Added string comparison operators lt, lti, le, lei, gt, gti, ge, gei.
4512 35. Added +ignore_unknown as a special item in host lists.
4514 36. Code for decoding IPv6 addresses in host lists is now included, even if
4515 IPv6 support is not being compiled. This fixes a bug in which an IPv6
4516 address was recognized as an IP address, but was then not correctly decoded
4517 into binary, causing unexpected and incorrect effects when compared with
4524 1. Very minor rewording of debugging text in manualroute to say "list of
4525 hosts" instead of "hostlist".
4527 2. If verify=header_syntax was set, and a header line with an unqualified
4528 address (no domain) and a large number of spaces between the end of the
4529 name and the colon was received, the reception process suffered a buffer
4530 overflow, and (when I tested it) crashed. This was caused by some obsolete
4531 code that should have been removed. The fix is to remove it!
4533 3. When running in the test harness, delay a bit after writing a bounce
4534 message to get a bit more predictability in the log output.
4536 4. Added a call to search_tidyup() just before forking a reception process. In
4537 theory, someone could use a lookup in the expansion of smtp_accept_max_
4538 per_host which, without the tidyup, could leave open a database connection.
4540 5. Added the variables $recipient_data and $sender_data which get set from a
4541 lookup success in an ACL "recipients" or "senders" condition, or a router
4542 "senders" option, similar to $domain_data and $local_part_data.
4544 6. Moved the writing of debug_print from before to after the "senders" test
4547 7. Change 4.31/66 (moving the time when the Received: is generated) caused
4548 problems for message scanning, either using a data ACL, or using
4549 local_scan() because the Received: header was not generated till after they
4550 were called (in order to set the time as the time of reception completion).
4551 I have revised the way this works. The header is now generated after the
4552 body is received, but before the ACL or local_scan() are called. After they
4553 are run, the timestamp in the header is updated.
4559 1. Change 4.24/6 introduced a bug because the SIGALRM handler was disabled
4560 before starting a queue runner without re-exec. This happened only when
4561 deliver_drop_privilege was set or when the Exim user was set to root. The
4562 effect of the bug was that timeouts during subsequent deliveries caused
4563 crashes instead of being properly handled. The handler is now left at its
4564 default (and expected) setting.
4566 2. The other case in which a daemon avoids a re-exec is to deliver an incoming
4567 message, again when deliver_drop_privilege is set or Exim is run as root.
4568 The bug described in (1) was not present in this case, but the tidying up
4569 of the other signals was missing. I have made the two cases consistent.
4571 3. The ignore_target_hosts setting on a manualroute router was being ignored
4572 for hosts that were looked up using the /MX notation.
4574 4. Added /ignore=<ip list> feature to @mx_any, @mx_primary, and @mx_secondary
4577 5. Change 4.31/55 was buggy, and broke when there was a rewriting rule that
4578 operated on the sender address. After changing the $sender_address to <>
4579 for the sender address verify, Exim was re-instated it as the original
4580 (before rewriting) address, but remembering that it had rewritten it, so it
4581 wasn't rewriting it again. This bug also had the effect of breaking the
4582 sender address verification caching when the sender address was rewritten.
4584 6. The ignore_target_hosts option was being ignored by the ipliteral router.
4585 This has been changed so that if the ip literal address matches
4586 ignore_target_hosts, the router declines.
4588 7. Added expansion conditions match_domain, match_address, and match_local_
4589 part (NOT match_host).
4591 8. The placeholder for the Received: header didn't have a length field set.
4593 9. Added code to Exim itself and to exim_lock to test for a specific race
4594 condition that could lead to file corruption when using MBX delivery. The
4595 issue is with the lockfile that is created in /tmp. If this file is removed
4596 after a process has opened it but before that process has acquired a lock,
4597 there is the potential for a second process to recreate the file and also
4598 acquire a lock. This could lead to two Exim processes writing to the file
4599 at the same time. The added code performs the same test as UW imapd; it
4600 checks after acquiring the lock that its file descriptor still refers to
4601 the same named file.
4603 10. The buffer for building added header lines was of fixed size, 8192 bytes.
4604 It is now parameterized by HEADER_ADD_BUFFER_SIZE and this can be adjusted
4607 11. Added the smtp_active_hostname option. If used, this will typically be made
4608 to depend on the incoming interface address. Because $interface_address is
4609 not set up until the daemon has forked a reception process, error responses
4610 that can happen earlier (such as "too many connections") no longer contain
4613 12. If an expansion in a condition on a "warn" statement fails because a lookup
4614 defers, the "warn" statement is abandoned, and the next ACL statement is
4615 processed. Previously this caused the whole ACL to be aborted.
4617 13. Added the iplsearch lookup type.
4619 14. Added ident_timeout as a log selector.
4621 15. Added tls_certificate_verified as a log selector.
4623 16. Added a global option tls_require_ciphers (compare the smtp transport
4624 option of the same name). This controls incoming TLS connections.
4626 17. I finally figured out how to make tls_require_ciphers do a similar thing
4627 in GNUtls to what it does in OpenSSL, that is, set up an appropriate list
4628 before starting the TLS session.
4630 18. Tabs are now shown as \t in -bP output.
4632 19. If the log selector return_path_on_delivery was set, Exim crashed when
4633 bouncing a message because it had too many Received: header lines.
4635 20. If two routers both had headers_remove settings, and the first one included
4636 a superfluous trailing colon, the final name in the first list and the
4637 first name in the second list were incorrectly joined into one item (with a
4638 colon in the middle).
4644 1. Added -C and -D options to the exinext utility, mainly to make it easier
4645 to include in the automated testing, but these could be helpful when
4646 multiple configurations are in use.
4648 2. The exinext utility was not formatting the output nicely when there was
4649 an alternate port involved in the retry record key, nor when there was a
4650 message id as well (for retries that were specific to a specific message
4651 and a specific host). It was also confused by IPv6 addresses, because of
4652 the additional colons they contain. I have fixed the IPv4 problem, and
4653 patched it up to do a reasonable job for IPv6.
4655 3. When there is an error after a MAIL, RCPT, or DATA SMTP command during
4656 delivery, the log line now contains "pipelined" if PIPELINING was used.
4658 4. An SMTP transport process used to panic and die if the bind() call to set
4659 an explicit outgoing interface failed. This has been changed; it is now
4660 treated in the same way as a connect() failure.
4662 5. A reference to $sender_host_name in the part of a conditional expansion
4663 that was being skipped was still causing a DNS lookup. This no longer
4666 6. The def: expansion condition was not recognizing references to header lines
4667 that used bh_ and bheader_.
4669 7. Added the _cache feature to named lists.
4671 8. The code for checking quota_filecount in the appendfile transport was
4672 allowing one more file than it should have been.
4674 9. For compatibility with Sendmail, the command line option
4682 and sets the incoming protocol and host name (for trusted callers). The
4683 host name and its colon can be omitted when only the protocol is to be set.
4684 Note the Exim already has two private options, -pd and -ps, that refer to
4685 embedded Perl. It is therefore impossible to set a protocol value of "d" or
4686 "s", but I don't think that's a major issue.
4688 10. A number of refactoring changes to the code, none of which should affect
4691 (a) The number of logging options was getting close to filling up the
4692 32-bit word that was used as a bit map. I have split them into two classes:
4693 those that are passed in the argument to log_write(), and those that are
4694 only ever tested independently outside of that function. These are now in
4695 separate 32-bit words, so there is plenty of room for expansion again.
4696 There is no change in the user interface or the logging behaviour.
4698 (b) When building, for example, log lines, the code previously used a
4699 macro that called string_cat() twice, in order to add two strings. This is
4700 not really sufficiently general. Furthermore, there was one instance where
4701 it was actually wrong because one of the argument was used twice, and in
4702 one call a function was used. (As it happened, calling the function twice
4703 did not affect the overall behaviour.) The macro has been replaced by a
4704 function that can join an arbitrary number of extra strings onto a growing
4707 (c) The code for expansion conditions now uses a table and a binary chop
4708 instead of a serial search (which was left over from when there were very
4709 few conditions). Also, it now recognizes conditions like "pam" even when
4710 the relevant support is not compiled in: a suitably worded error message is
4711 given if an attempt is made to use such a condition.
4713 11. Added ${time_interval:xxxxx}.
4715 12. A bug was causing one of the ddress fields not to be passed back correctly
4716 from remote delivery subprocesses. The field in question was not being
4717 subsequently used, so this caused to problems in practice.
4719 13. Added new log selectors queue_time and deliver_time.
4721 14. Might have fixed a bug in maildirsizefile handling that threw up
4722 "unexpected character" debug warnings, and recalculated the data
4723 unnecessarily. In any case, I expanded the warning message to give more
4726 15. Added the message "Restricted characters in address" to the statements in
4727 the default ACL that block characters like @ and % in local parts.
4729 16. Change 71 for release 4.31 proved to be much less benign that I imagined.
4730 Three changes have been made:
4732 (a) There was a serious bug; a negative response to MAIL caused the whole
4733 recipient domain to be cached as invalid, thereby blocking all messages
4734 to all local parts at the same domain, from all senders. This bug has
4735 been fixed. The domain is no longer cached after a negative response to
4736 MAIL if the sender used is not empty.
4738 (b) The default behaviour of using MAIL FROM:<> for recipient callouts has
4741 (c) A new callout option, "use_sender" has been added for people who want
4742 the modified behaviour.
4748 1. Removed "EXTRALIBS=-lwrap" from OS/Makefile-Unixware7 on the advice of
4751 2. Removed "LIBS = -lresolv" from OS/Makefile-Darwin as it is not needed, and
4752 indeed breaks things for older releases.
4754 3. Added additional logging to the case where there is a problem reading data
4755 from a filter that is running in a subprocess using a pipe, in order to
4756 try to track down a specific problem.
4758 4. Testing facility fudge: when running in the test harness and attempting
4759 to connect to 10.x.x.x (expecting a connection timeout) I'm now sometimes
4760 getting "No route to host". Convert this to a timeout.
4762 5. Define ICONV_ARG2_TYPE as "char **" for Unixware7 to avoid compiler
4765 6. Some OS don't have socklen_t but use size_t instead. This affects the
4766 fifth argument of getsockopt() amongst other things. This is now
4767 configurable by a macro called SOCKLEN_T which defaults to socklen_t, but
4768 can be set for individual OS. I have set it for SunOS5, OSF1, and
4769 Unixware7. Current versions of SunOS5 (aka Solaris) do have socklen_t, but
4770 some earlier ones do not.
4772 7. Change 4.30/15 was not doing the test caselessly.
4774 8. The standard form for an IPv6 address literal was being rejected by address
4775 parsing in, for example, MAIL and RCPT commands. An example of this kind of
4776 address is [IPv6:2002:c1ed:8229:10:202:2dff:fe07:a42a]. Exim now accepts
4777 this, as well as the form without the "IPv6" on the front (but only when
4778 address literals are enabled, of course).
4780 9. Added some casts to avoid compiler warnings in OS/os.c-Linux.
4782 10. Exim crashed if a message with an empty sender address specified by -f
4783 encountered a router with an errors_to setting. This could be provoked only
4784 by a command such as
4788 where an empty string was supplied; "<>" did not hit this bug.
4790 11. Installed PCRE release 4.5.
4792 12. If EHLO/HELO was rejected by an ACL, the value of $sender_helo_name
4793 remained set. It is now erased.
4795 13. exiqgrep wasn't working on MacOS X because it didn't correctly compute
4796 times from message ids (which are base 36 rather than the normal 62).
4798 14. "Expected" SMTP protocol errors that can arise when PIPELINING is in use
4799 were being counted as actual protocol errors, and logged if the log
4800 selector +smtp_protocol_error was set. One cannot be perfect in this test,
4801 but now, if PIPELINING has been advertised, RCPT following a rejected MAIL,
4802 and DATA following a set of rejected RCPTs do not count as protocol errors.
4803 In other words, Exim assumes they were pipelined, though this may not
4804 actually be the case. Of course, in all cases the client gets an
4805 appropriate error code.
4807 15. If a lookup fails in an ACL condition, a message about the failure may
4808 be available; it is used if testing the ACL cannot continue, because most
4809 such messages specify what the cause of the deferral is. However, some
4810 messages (e.g. "MYSQL: no data found") do not cause a defer. There was bug
4811 that caused an old message to be retained and used if a later statement
4812 caused a defer, replacing the real cause of the deferral.
4814 16. If an IP address had so many PTR records that the DNS lookup buffer
4815 was not large enough to hold them, Exim could crash while trying to process
4816 the truncated data. It now detects and logs this case.
4818 17. Further to 4.21/58, another change has been made: if (and only if) the
4819 first line of a message (the first header line) ends with CRLF, a bare LF
4820 in a subsequent header line has a space inserted after it, so as not to
4821 terminate the header.
4823 18. Refactoring: tidied an ugly bit of code in appendfile that copied data
4824 unnecessarily, used atoi() instead of strtol(), and didn't check the
4825 termination when getting file sizes from file names by regex.
4827 19. Completely re-implemented the support for maildirsize files, in the light
4828 of a number of problems with the previous contributed implementation
4829 (4.30/29). In particular:
4831 . If the quota is zero, the maildirsize file is maintained, but no quota is
4834 . If the maildir directory does not exist, it is created before any attempt
4835 to write a maildirsize file.
4837 . The quota value in the file is just a cache; if the quota is changed in
4838 the transport, the new value overrides.
4840 . A regular expression is available for excluding directories from the
4843 20. The autoreply transport checks the characters in options that define the
4844 message's headers; it allows continued headers, but it was checking with
4845 isspace() after an embedded newline instead of explicitly looking for a
4848 21. If all the "regular" hosts to which an address was routed had passed their
4849 expiry times, and had not reached their retry times, the address was
4850 bounced, even if fallback hosts were defined. Now Exim should go on to try
4853 22. Increased buffer sizes in the callout code from 1024 to 4096 to match the
4854 equivalent code in the SMTP transport. Some hosts send humungous responses
4855 to HELO/EHLO, more than 1024 it seems.
4857 23. Refactoring: code in filter.c used (void *) for "any old type" but this
4858 gives compiler warnings in some environments. I've now done it "properly",
4861 24. The replacement for inet_ntoa() that is used with gcc on IRIX systems
4862 (because of problems with the built-in one) was declared to return uschar *
4863 instead of char *, causing compiler failure.
4865 25. Fixed a file descriptor leak when processing alias/forward files.
4867 26. Fixed a minor format string issue in dbfn.c.
4869 27. Typo in exim.c: ("dmbnz" for "dbmnz").
4871 28. If a filter file refered to $h_xxx or $message_headers, and the headers
4872 contained RFC 2047 "words", Exim's memory could, under certain conditions,
4875 29. When a sender address is verified, it is cached, to save repeating the test
4876 when there is more than one recipient in a message. However, when the
4877 verification involves a callout, it is possible for different callout
4878 options to be set for different recipients. It is too complicated to keep
4879 track of this in the cache, so now Exim always runs a verification when a
4880 callout is required, relying on the callout cache for the optimization.
4881 The overhead is duplication of the address routing, but this should not be
4884 30. Fixed a bug in callout caching. If a RCPT command caused the sender address
4885 to be verified with callout=postmaster, and the main callout worked but the
4886 postmaster check failed, the verification correctly failed. However, if a
4887 subsequent RCPT command asked for sender verification *without* the
4888 postmaster check, incorrect caching caused this verification also to fail,
4891 31. Exim caches DNS lookup failures so as to avoid multiple timeouts; however,
4892 it was not caching the DNS options (qualify_single, search_parents) that
4893 were used when the lookup failed. A subsequent lookup with different
4894 options therefore always gave the same answer, though there were cases
4895 where it should not have. (Example: a "domains = !$mx_any" option on a
4896 dnslookup router: the "domains" option is always processed without any
4897 widening, but the router might have qualify_single set.) Now Exim uses the
4898 cached value only when the same options are set.
4900 32. Added John Jetmore's "exipick" utility to the distribution.
4902 33. GnuTLS: When an attempt to start a TLS session fails for any reason other
4903 than a timeout (e.g. a certificate is required, and is not provided), an
4904 Exim server now closes the connection immediately. Previously it waited for
4905 the client to close - but if the client is SSL, it seems that they each
4906 wait for each other, leading to a delay before one of them times out.
4908 34: GnuTLS: Updated the code to use the new GnuTLS 1.0.0 API. I have not
4909 maintained 0.8.x compatibility because I don't think many are using it, and
4910 it is clearly obsolete.
4912 35. Added TLS support for CRLs: a tls_crl global option and one for the smtp
4915 36. OpenSSL: $tls_certificate_verified was being set to 1 even if the
4916 client certificate was expired. A simple patch fixes this, though I don't
4917 understand the full logic of why the verify callback is called multiple
4920 37. OpenSSL: a patch from Robert Roselius: "Enable client-bug workaround.
4921 Versions of OpenSSL as of 0.9.6d include a 'CBC countermeasure' feature,
4922 which causes problems with some clients (such as the Certicom SSL Plus
4923 library used by Eudora). This option, SSL_OP_DONT_INSERT_EMPTY_FRAGMENTS,
4924 disables the coutermeasure allowing Eudora to connect."
4926 38. Exim was not checking that a write() to a log file succeeded. This could
4927 lead to Bad Things if a log got too big, in particular if it hit a file
4928 size limit. Exim now panics and dies if it cannot write to a log file, just
4929 as it does if it cannot open a log file.
4931 39. Modified OS/Makefile-Linux so that it now contains
4933 CFLAGS=-O -D_FILE_OFFSET_BITS=64 -D_LARGEFILE_SOURCE
4935 The two -D definitions ensure that Exim is compiled with large file
4936 support, which makes it possible to handle log files that are bigger than
4939 40. Fixed a subtle caching bug: if (in an ACL or a set of routers, for
4940 instance) a domain was checked against a named list that involved a lookup,
4941 causing $domain_data to be set, then another domain was checked against the
4942 same list, then the first domain was re-checked, the value of $domain_data
4943 after the final check could be wrong. In particular, if the second check
4944 failed, it could be set empty. This bug probably also applied to
4947 41. The strip_trailing_dot option was not being applied to the address given
4948 with the -f command-line option.
4950 42. The code for reading a message's header from the spool was incrementing
4951 $received_count, but never initializing it. This meant that the value was
4952 incorrect (doubled) while delivering a message in the same process in which
4953 it was received. In the most common configuration of Exim, this never
4954 happens - a fresh exec is done - but it can happen when
4955 deliver_drop_privilege is set.
4957 43. When Exim logs an SMTP synchronization error - client data sent too soon -
4958 it now includes up to 150 characters of the unexpected data in the log
4961 44. The exim_dbmbuild utility uses fixed size buffers for reading input lines
4962 and building data strings. The size of both of these buffers was 10 000
4963 bytes - far larger than anybody would *ever* want, thought I. Needless to
4964 say, somebody hit the limit. I have increased the maximum line length to
4965 20 000 and the maximum data length of concatenated lines to 100 000. I have
4966 also fixed two bugs, because there was no checking on these buffers. Tsk,
4967 tsk. Now exim_dbmbuild gives a message and exits with an error code if a
4968 buffer is too small.
4970 45. The exim_dbmbuild utility did not support quoted keys, as Exim does in
4971 lsearch lookups. Now it does.
4973 46. When parsing a route_list item in a manualroute router, a fixed-length
4974 buffer was used for the list of hosts. I made this 1024 bytes long,
4975 thinking that nobody would ever have a list of hosts that long. Wrong.
4976 Somebody had a whole pile of complicated expansion conditions, and the
4977 string was silently truncated, leading to an expansion error. It turns out
4978 that it is easier to change to an unlimited length (owing to other changes
4979 that have happened since this code was originally written) than to build
4980 structure for giving a limitation error. The length of the item that
4981 expands into the list of hosts is now unlimited.
4983 47. The lsearch lookup could not handle data where the length of text line was
4984 more than 4095 characters. Such lines were truncated, leading to shortened
4985 data being returned. It should now handle lines of any length.
4987 48. Minor wording revision: "cannot test xxx in yyy ACL" becomes "cannot test
4988 xxx condition in yyy ACL" (e.g. "cannot test domains condition in DATA
4991 49. Cosmetic tidy to scripts like exicyclog that are generated by globally
4992 replacing strings such as BIN_DIRECTORY in a source file: the replacement
4993 no longer happens in comment lines. A list of replacements is now placed
4994 at the head of all of the source files, except those whose only change is
4995 to replace PERL_COMMAND in the very first #! line.
4997 50. Replaced the slow insertion sort in queue.c, for sorting the list of
4998 messages on the queue, with a bottom-up merge sort, using code contributed
4999 by Michael Haardt. This should make operations like -bp somewhat faster on
5000 large queues. It won't affect queue runners, except when queue_run_in_order
5003 51. Installed eximstats 1.31 in the distribution.
5005 52. Added support for SRV lookups to the dnslookup router.
5007 53. If an ACL referred to $message_body or $message_body_end, the value was not
5008 reset for any messages that followed in the same SMTP session.
5010 54. The store-handling optimization for building very long strings was not
5011 differentiating between the different store pools. I don't think this
5012 actually made any difference in practice, but I've tidied it.
5014 55. While running the routers to verify a sender address, $sender_address
5015 was still set to the sender address. This is wrong, because when routing to
5016 send a bounce to the sender, it would be empty. Therefore, I have changed
5017 it so that, while verifying a sender address, $sender_address is set to <>.
5018 (There is no change to what happens when verifying a recipient address.)
5020 56. After finding MX (or SRV) records, Exim was doing a DNS lookup for the
5021 target A or AAAA records (if not already returned) without resetting the
5022 qualify_single or search_parents options of the DNS resolver. These are
5023 inappropriate in this case because the targets of MX and SRV records must
5024 be FQDNs. A broken DNS record could cause trouble if it happened to have a
5025 target that, when qualified, matched something in the local domain. These
5026 two options are now turned off when doing these lookups.
5028 57. It seems that at least some releases of Reiserfs (which does not have the
5029 concept of a fixed number of inodes) returns zero and not -1 for the
5030 number of available inodes. This interacted badly with check_spool_inodes,
5031 which assumed that -1 was the "no such thing" setting. What I have done is
5032 to check that the total number of inodes is greater than zero before doing
5033 the test of how many are available.
5035 58. When a "warn" ACL statement has a log_message modifier, the message is
5036 remembered, and not repeated. This is to avoid a lot of repetition when a
5037 message has many recipients that cause the same warning to be written.
5038 Howewer, Exim was preserving the list of already written lines for an
5039 entire SMTP session, which doesn't seem right. The memory is now reset if a
5040 new message is started.
5042 59. The "rewrite" debugging flag was not showing the result of rewriting in the
5043 debugging output unless log_rewrite was also set.
5045 60. Avoid a compiler warning on 64-bit systems in dsearch.c by avoiding the use
5046 of (int)(handle) when we know that handle contains (void *)(-1).
5048 61. The Exim daemon panic-logs an error return when it closes the incoming
5049 connection. However "connection reset by peer" seems to be common, and
5050 isn't really an error worthy of noting specially, so that particular error
5053 62. When Exim is trying to find all the local interfaces, it used to panic and
5054 die if the ioctl to get the interface flags failed. However, it seems that
5055 on at least one OS (Solaris 9) it is possible to have an interface that is
5056 included in the list of interfaces, but for which you get a failure error
5057 for this call. This happens when the interface is not "plumbed" into a
5058 protocol (i.e. neither IPv4 nor IPv6). I've changed the code so that a
5059 failure of the "get flags" call assumes that the interface is down.
5061 63. Added a ${eval10: operator, which assumes all numbers are decimal. This
5062 makes life easier for people who are doing arithmetic on fields extracted
5063 from dates, where you often get leading zeros that should not be
5064 interpreted as octal.
5066 64. Added qualify_domain to the redirect router, to override the global
5069 65. If a pathologically long header line contained very many addresses (the
5070 report of this problem mentioned 10 000) and each of them was rewritten,
5071 Exim could use up a very large amount of memory. (It kept on making new
5072 copies of the header line as it rewrote, and never released the old ones.)
5073 At the expense of a bit more processing, the header rewriting function has
5074 been changed so that it no longer eats memory in this way.
5076 66. The generation of the Received: header has been moved from the time that a
5077 message starts to be received, to the time that it finishes. The timestamp
5078 in the Received: header should now be very close to that of the <= log
5079 line. There are two side-effects of this change:
5081 (a) If a message is rejected by a DATA or non-SMTP ACL or local_scan(), the
5082 logged header lines no longer include the local Received: line, because
5083 it has not yet been created. The same applies to a copy of the message
5084 that is returned to a non-SMTP sender when a message is rejected.
5086 (b) When a filter file is tested using -bf, no additional Received: header
5087 is added to the test message. After some thought, I decided that this
5090 This change does not affect the value of $received_for. It is still set
5091 after address rewriting, but before local_scan() is called.
5093 67. Installed the latest Cygwin-specific files from the Cygwin maintainer.
5095 68. GnuTLS: If an empty file is specified for tls_verify_certificates, GnuTLS
5096 gave an unhelpful panic error message, and a defer error. I have managed to
5097 change this behaviour so that it now rejects any supplied certificate,
5098 which seems right, as the list of acceptable certificates is empty.
5100 69. OpenSSL: If an empty file is specified for tls_verify_certificates, OpenSSL
5101 gave an unhelpful defer error. I have not managed to make this reject any
5102 supplied certificates, but the error message it gives is "no certificate
5103 supplied", which is not helpful.
5105 70. exigrep's output now also includes lines that are not associated with any
5106 message, but which match the given pattern. Implemented by a patch from
5107 Martin Sluka, which also tidied up the Perl a bit.
5109 71. Recipient callout verification, like sender verification, was using <> in
5110 the MAIL FROM command. This isn't really the right thing, since the actual
5111 sender may affect whether the remote host accepts the recipient or not. I
5112 have changed it to use the actual sender in the callout; this means that
5113 the cache record is now keyed on a recipient/sender pair, not just the
5114 recipient address. There doesn't seem to be a real danger of callout loops,
5115 since a callout by the remote host to check the sender would use <>.
5116 [SEE ABOVE: changed after hitting problems.]
5118 72. Exim treats illegal SMTP error codes that do not begin with 4 or 5 as
5119 temporary errors. However, in the case of such a code being given after
5120 the end of a data transmission (i.e. after ".") Exim was failing to write
5121 a retry record for the message. (Yes, there was some broken host that was
5122 actually sending 8xx at this point.)
5124 73. An unknown lookup type in a host list could cause Exim to panic-die when
5125 the list was checked. (An example that provoked this was putting <; in the
5126 middle of a list instead of at the start.) If this happened during a DATA
5127 ACL check, a -D file could be left lying around. This kind of configuration
5128 error no longer causes Exim to die; instead it causes a defer errror. The
5129 incident is still logged to the main and panic logs.
5131 74. Buglet left over from Exim 3 conversion. The message "too many messages
5132 in one connection" was written to the rejectlog but not the mainlog, except
5133 when address rewriting (yes!) was being logged.
5135 75. Added write_rejectlog option.
5137 76. When a system filter was run not as root (that is, when system_filter_user
5138 was set), the values of the $n variables were not being returned to the
5139 main process; thus, they were not subsequently available in the $sn
5142 77. Added +return_path_on_delivery log selector.
5144 78. A connection timeout was being treated differently from recipients deferred
5145 when testing hosts_max_try with a message that was older than the host's
5146 retry timeout. (The host should not be counted, thus allowing all hosts to
5147 be tried at least once before bouncing.) This may have been the cause of an
5148 occasionally reported bug whereby a message would remain on the queue
5149 longer than the retry timeout, but would be bounced if a delivery was
5150 forced. I say "may" because I never totally pinned down the problem;
5151 setting up timeout/retry tests is difficult. See also the next item.
5153 79. The ultimate address timeout was not being applied to errors that involved
5154 a combination of host plus message (for example, a timeout on a MAIL
5155 command). When an address resolved to a number of possible hosts, and they
5156 were not all tried for each delivery (e.g. because of hosts_max_try), a
5157 message could remain on the queue longer than the retry timeout.
5159 80. Sieve bug: "stop" inside "elsif" was broken. Applied a patch from Michael
5162 81. Fixed an obscure SMTP outgoing bug which required at least the following
5163 conditions: (a) there was another message waiting for the same server;
5164 (b) the server returned 5xx to all RCPT commands in the first message so
5165 that the message was not completed; (c) the server dropped the connection
5166 or gave a negative response to the RSET that Exim sends to abort the
5167 transaction. The observed case was a dropped connection after DATA that had
5168 been sent in pipelining mode. That is, the server had advertised PIPELINING
5169 but was not implementing it correctly. The effect of the bug was incorrect
5170 behaviour, such as trying another host, and this could lead to a crash.
5176 1. The 3rd arguments to getsockname(), getpeername(), and accept() in exim.c
5177 and daemon.c were passed as pointers to ints; they should have been
5178 pointers to socklen_t variables (which are typically unsigned ints).
5180 2. Some signed/unsigned type warnings in the os.c file for Linux have been
5183 3. Fixed a really odd bug that affected only the testing scheme; patching a
5184 certain fixed string in the binary changed the value of another string that
5185 happened to be identical to the end of the original first string.
5187 4. When gethostbyname() (or equivalent) is passed an IP address as a "host
5188 name", it returns that address as the IP address. On some operating
5189 systems (e.g. Solaris), it also passes back the IP address string as the
5190 "host name". However, on others (e.g. Linux), it passes back an empty
5191 string. Exim wasn't checking for this, and was changing the host name to an
5192 empty string, assuming it had been canonicized.
5194 5. Although rare, it is permitted to have more than one PTR record for a given
5195 IP address. I thought that gethostbyaddr() or getipnodebyaddr() always gave
5196 all the names associated with an address, because they do in Solaris.
5197 However, it seems that they do not in Linux for data that comes from the
5198 DNS. If an address in /etc/hosts has multiple names, they _are_ all given.
5199 I found this out when I moved to a new Linux workstation and tried to run
5200 the Exim test suite.
5202 To get round this problem I have changed the code so that it now does its
5203 own call to the DNS to look up PTR records when searching for a host name.
5204 If nothing can be found in the DNS, it tries gethostbyaddr(), so that
5205 addresses that are only in /etc/hosts are still found.
5207 This behaviour is, however, controlled by an option called host_lookup_
5208 order, which defaults to "bydns:byaddr". If people want to use the other
5209 order, or indeed, just use one or the other means of lookup, they can
5210 specify it in this variable.
5212 6. If a PTR record yields an empty name, Exim treats it as non-existent. In
5213 some operating systems, this comes back from gethostbyaddr() as an empty
5214 string, and this is what Exim used to test for. However, it seems that in
5215 other systems, "." is yielded. Exim now tests for this case too.
5217 7. The values of check_spool_space and check_log_space are now held internally
5218 as a number of kilobytes instead of an absolute number of bytes. If a
5219 numbers is specified without 'K' or 'M', it is rounded up to the nearest
5220 kilobyte. This means that much larger values can be stored.
5222 8. Exim monitor: an attempt to get the action menu when not actually pointing
5223 at a message produces an empty menu entitled "No message selected". This
5224 works on Solaris (OpenWindows). However, XFree86 does not like a menu with
5225 no entries in it ("Shell widget menu has zero width and/or height"). So I
5226 have added a single, blank menu entry in this case.
5228 9. Added ${quote_local_part.
5230 10. MIME decoding is now applied to the contents of Subject: header lines when
5233 11. Now that a reference to $sender_host_address automatically causes a reverse
5234 lookup to occur if necessary (4.13/18), there is no need to arrange for a
5235 host lookup before query-style lookups in lists that might use this
5236 variable. This has therefore been abolished, and the "net-" prefix is no
5237 longer necessary for query-style lookups.
5239 12. The Makefile for SCO_SV contained a setting of LDFLAGS. This appears to
5240 have been a typo for LFLAGS, so it has been changed.
5242 13. The install script calls Exim with "-C /dev/null" in order to find the
5243 version number. If ALT_CONFIG_PREFIX was set, this caused an error message
5244 to be output. Howeve, since Exim outputs its version number before the
5245 error, it didn't break the script. It just looked ugly. I fixed this by
5246 always allowing "-C /dev/null" if the caller is root.
5248 14. Ignore overlarge ACL variable number when reading spool file - insurance
5249 against a later release with more variables having written the file.
5251 15. The standard form for an IPv6 address literal was being rejected by EHLO.
5252 Example: [IPv6:2002:c1ed:8229:10:202:2dff:fe07:a42a]. Exim now accepts
5253 this, as well as the form without the "IPv6" on the front.
5255 16. Added CHOWN_COMMAND=/usr/sbin/chown and LIBS=-lresolv to the
5256 OS/Makefile-Darwin file.
5258 17. Fixed typo in lookups/ldap.c: D_LOOKUP should be D_lookup. This applied
5259 only to LDAP libraries that do not have LDAP_OPT_DEREF.
5261 18. After change 4.21/52, "%ld" was used to format the contents of the $inode
5262 variable. However, some OS use ints for inodes. I've added cast to long int
5263 to get rid of the compiler warning.
5265 19. I had forgotten to lock out "/../" in configuration file names when
5266 ALT_CONFIG_PREFIX was set.
5268 20. Routers used for verification do not need to specify transports. However,
5269 if such a router generated a host list, and callout was configured, Exim
5270 crashed, because it could not find a port number from the (non-existent)
5271 transport. It now assumes port 25 in this circumstance.
5273 21. Added the -t option to exigrep.
5275 22. If LOOKUP_LSEARCH is defined, all three linear search methods (lsearch,
5276 wildlsearch, nwildlsearch) are compiled. LOOKUP_WILDLSEARCH and LOOKUP_
5277 NWILDLSEARCH are now obsolete, but retained for compatibility. If either of
5278 them is set, LOOKUP_LSEARCH is forced.
5280 23. "exim -bV" now outputs a list of lookups that are included in the binary.
5282 24. Added sender and host information to the "rejected by local_scan()" log
5283 line; previously there was no indication of these.
5285 25. Added .include_if_exists.
5287 26. Change 3.952/11 added an explicit directory sync on top of a file sync for
5288 Linux. It turns out that not all file systems support this. Apparently some
5289 versions of NFS do not. (It's rare to put Exim's spool on NFS, but people
5290 do it.) To cope with this, the error EINVAL, which means that sync-ing is
5291 not supported on the file descriptor, is now ignored when Exim is trying to
5292 sync a directory. This applies only to Linux.
5294 27. Added -DBIND_8_COMPAT to the CLFAGS setting for Darwin.
5296 28. In Darwin (MacOS X), the PAM headers are in /usr/include/pam and not in
5297 /usr/include/security. There's now a flag in OS/os.h-Darwin to cope with
5300 29. Added support for maildirsize files from supplied patch (modified a bit).
5302 30. The use of :fail: followed by an empty string could lead Exim to respond to
5303 sender verification failures with (e.g.):
5305 550 Verification failed for <xxx>
5306 550 Sender verify failed
5308 where the first response line was missing the '-' that indicates it is not
5309 the final line of the response.
5311 31. The loop for finding the name of the user that called Exim had a hardwired
5312 limit of 10; it now uses the value of finduser_retries, which is used for
5313 all other user lookups.
5315 32. Added $received_count variable, available in data and not_smtp ACLs, and at
5318 33. Exim was neglecting to zero errno before one call of strtol() when
5319 expanding a string and expecting an integer value. On some systems this
5320 resulted in spurious "integer overflow" errors. Also, it was casting the
5321 result into an int without checking.
5323 34. Testing for a connection timeout using "timeout_connect" in the retry rules
5324 did not work. The code looks as if it has *never* worked, though it appears
5325 to have been documented since at least releast 1.62. I have made it work.
5327 35. The "timeout_DNS" error in retry rules, also documented since at least
5328 1.62, also never worked. As it isn't clear exactly what this means, and
5329 clearly it isn't a major issue, I have abolished the feature by treating it
5330 as "timeout", and writing a warning to the main and panic logs.
5332 36. The display of retry rules for -brt wasn't always showing the error code
5335 37. Added new error conditions to retry rules: timeout_A, timeout_MX,
5336 timeout_connect_A, timeout_connect_MX.
5338 38. Rewriting the envelope sender at SMTP time did not allow it to be rewritten
5339 to the empty sender.
5341 39. The daemon was not analysing the content of -oX till after it had closed
5342 stderr and disconnected from the controlling terminal. This meant that any
5343 syntax errors were only noted on the panic log, and the return code from
5344 the command was 0. By re-arranging the code a little, I've made the
5345 decoding happen first, so such errors now appear on stderr, and the return
5346 code is 1. However, the actual setting up of the sockets still happens in
5347 the disconnected process, so errors there are still only recorded on the
5350 40. A daemon listener on a wildcard IPv6 socket that also accepts IPv4
5351 connections (as happens on some IP stacks) was logged at start up time as
5352 just listening for IPv6. It now logs "IPv6 with IPv4". This differentiates
5353 it from "IPv6 and IPv4", which means that two separate sockets are being
5356 41. The debug output for gethostbyname2() or getipnodebyname() failures now
5357 says whether AF_INET or AF_INET6 was passed as an argument.
5359 42. Exiwhat output was messed up when time zones were included in log
5362 43. Exiwhat now gives more information about the daemon's listening ports,
5363 and whether -tls-on-connect was used.
5365 44. The "port" option of the smtp transport is now expanded.
5367 45. A "message" modifier in a "warn" statement in a non-message ACL was being
5368 silently ignored. Now an error message is written to the main and panic
5371 46. There's a new ACL modifier called "logwrite" which writes to a log file
5372 as soon as it is encountered.
5374 47. Added $local_user_uid and $local_user_gid at routing time.
5376 48. Exim crashed when trying to verify a sender address that was being
5379 49. Exim was recognizing only a space character after ".include". It now also
5380 recognizes a tab character.
5382 50. Fixed several bugs in the Perl script that creates the exim.8 man page by
5383 extracting the relevant information from the specification. The man page no
5384 longer contains scrambled data for the -d option, and I've added a section
5385 at the front about calling Exim under different names.
5387 51. Added "extra_headers" argument to the "mail" command in filter files.
5389 52. Redirecting mail to an unqualified address in a Sieve filter caused Exim to
5392 53. Installed eximstats 1.29.
5394 54. Added transport_filter_timeout as a generic transport option.
5396 55. Exim no longer adds an empty Bcc: header to messages that have no To: or
5397 Cc: header lines. This was required by RFC 822, but it not required by RFC
5400 56. Exim used to add From:, Date:, and Message-Id: header lines to any
5401 incoming messages that did not have them. Now it does so only if the
5402 message originates locally, that is, if there is no associated remote host
5403 address. When Resent- header lines are present, this applies to the Resent-
5404 lines rather than the non-Resent- lines.
5406 57. Drop incoming SMTP connection after too many syntax or protocol errors. The
5407 limit is controlled by smtp_max_synprot_errors, defaulting to 3.
5409 58. Messages for configuration errors now include the name of the main
5410 configuration file - useful now that there may be more than one file in a
5411 list (.included file names were always shown).
5413 59. Change 4.21/82 (run initgroups() when starting the daemon) causes problems
5414 for those rare installations that do not start the daemon as root or run it
5415 setuid root. I've cut out the call to initgroups() if the daemon is not
5418 60. The Exim user and group can now be bound into the binary as text strings
5419 that are looked up at the start of Exim's processing.
5421 61. Applied a small patch for the Interbase code, supplied by Ard Biesheuvel.
5423 62. Added $mailstore_basename variable.
5425 63. Installed patch to sieve.c from Michael Haardt.
5427 64. When Exim failed to open the panic log after failing to open the main log,
5428 the original message it was trying to log was written to stderr and debug
5429 output, but if they were not available (the usual case in production), it
5430 was lost. Now it is written to syslog before the two lines that record the
5431 failures to open the logs.
5433 65. Users' Exim filters run in subprocesses under the user's uid. It is
5434 possible for a "deliver" command or an alias in a "personal" command to
5435 provoke an address rewrite. If logging of address rewriting is configured,
5436 this fails because the process is not running as root or exim. There may be
5437 a better way of dealing with this, but for the moment (because 4.30 needs
5438 to be released), I have disabled address rewrite logging when running a
5439 filter in a non-root, non-exim process.
5445 1. The buildconfig auxiliary program wasn't quoting the value set for
5446 HEADERS_CHARSET. This caused a compilation error complaining that 'ISO' was
5447 not defined. This bug was masked in 4.22 by the effect that was fixed in
5450 2. Some messages that were rejected after a message id was allocated were
5451 shown as "incomplete" by exigrep. It no longer does this for messages that
5452 are rejected by local_scan() or the DATA or non-SMTP ACLs.
5454 3. If a Message-ID: header used a domain literal in the ID, and Exim did not
5455 have allow_domain_literals set, the ID did not get logged in the <= line.
5456 Domain literals are now always recognized in Message-ID: header lines.
5458 4. The first argument for a ${extract expansion item is the key name or field
5459 number. Leading and trailing spaces in this item were not being ignored,
5460 causing some misleading effects.
5462 5. When deliver_drop_privilege was set, single queue runner processes started
5463 manually (i.e. by the command "exim -q") or by the daemon (which uses the
5464 same command in the process it spins off) were not dropping privilege.
5466 6. When the daemon running as "exim" started a queue runner, it always
5467 re-executed Exim in the spun-off process. This is a waste of effort when
5468 deliver_drop_privilege is set. The new process now just calls the
5469 queue-runner function directly.
5475 1. Typo in the src/EDITME file: it referred to HEADERS_DECODE_TO instead of
5478 2. Change 4.21/73 introduced a bug. The pid file path set by -oP was being
5479 ignored. Though the use of -oP was forcing the writing of a pid file, it
5480 was always written to the default place.
5482 3. If the message "no IP address found for host xxxx" is generated during
5483 incoming verification, it is now followed by identification of the incoming
5484 connection (so you can more easily find what provoked it).
5486 4. Bug fix for Sieve filters: "stop" inside a block was not working properly.
5488 5. Added some features to "harden" Exim a bit more against certain attacks:
5490 (a) There is now a build-time option called FIXED_NEVER_USERS that can
5491 be put in Local/Makefile. This is like the never_users runtime option,
5492 but it cannot be overridden. The default setting is "root".
5494 (b) If ALT_CONFIG_PREFIX is defined in Local/Makefile, it specifies a
5495 prefix string with which any file named in a -C command line option
5498 (c) If ALT_CONFIG_ROOT_ONLY is defined in Local/Makefile, root privilege
5499 is retained for -C and -D only if the caller of Exim is root. Without
5500 it, the exim user may also use -C and -D and retain privilege.
5502 (d) If DISABLE_D_OPTION is defined in Local/Makefile, the use of the -D
5503 command line option is disabled.
5505 6. Macro names set by the -D option must start with an upper case letter, just
5506 like macro names defined in the configuration file.
5508 7. Added "dereference=" facility to LDAP.
5510 8. Two instances of the typo "uknown" in the source files are fixed.
5512 9. If a PERL_COMMAND setting in Local/Makefile was not at the start of a line,
5513 the Configure-Makefile script screwed up while processing it.
5515 10. Incorporated PCRE 4.4.
5517 11. The SMTP synchronization check was not operating right at the start of an
5518 SMTP session. For example, it could not catch a HELO sent before the client
5519 waited for the greeting. There is now a check for outstanding input at the
5520 point when the greeting is written. Because of the duplex, asynchronous
5521 nature of TCP/IP, it cannot be perfect - the incorrect input may be on its
5522 way, but not yet received, when the check is performed.
5524 12. Added tcp_nodelay to make it possible to turn of the setting of TCP_NODELAY
5525 on TCP/IP sockets, because this apparently causes some broken clients to
5528 13. Installed revised OS/Makefile-CYGWIN and OS/os.c-cygwin (the .h file was
5529 unchanged) from the Cygwin maintainer.
5531 14. The code for -bV that shows what is in the binary showed "mbx" when maildir
5532 was supported instead of testing for mbx. Effectively a typo.
5534 15. The spa authenticator server code was not checking that the input it
5535 received was valid base64.
5537 16. The debug output line for the "set" modifier in ACLs was not showing the
5538 name of the variable that was being set.
5540 17. Code tidy: the variable type "vtype_string" was never used. Removed it.
5542 18. Previously, a reference to $sender_host_name did not cause a DNS reverse
5543 lookup on its own. Something else was needed to trigger the lookup. For
5544 example, a match in host_lookup or the need for a host name in a host list.
5545 Now, if $sender_host_name is referenced and the host name has not yet been
5546 looked up, a lookup is performed. If the lookup fails, the variable remains
5547 empty, and $host_lookup_failed is set to "1".
5549 19. Added "eqi" as a case-independent comparison operator.
5551 20. The saslauthd authentication condition could segfault if neither service
5552 nor realm was specified.
5554 21. If an overflowing value such as "2048M" was set for message_size_limit, the
5555 error message that was logged was misleading, and incoming SMTP
5556 connections were dropped. The message is now more accurate, and temporary
5557 errors are given to SMTP connections.
5559 22. In some error situations (such as 21 above) Exim rejects all SMTP commands
5560 (except RSET) with a 421 error, until QUIT is received. However, it was
5561 failing to send a response to QUIT.
5563 23. The HELO ACL was being run before the code for helo_try_verify_hosts,
5564 which made it impossible to use "verify = helo" in the HELO ACL. The HELO
5565 ACL is now run after the helo_try_verify_hosts code.
5567 24. "{MD5}" and "{SHA1}" are now recognized as equivalent to "{md5"} and
5568 "{sha1}" in the "crypteq" expansion condition (in fact the comparison is
5569 case-independent, so other case variants are also recognized). Apparently
5570 some systems use these upper case variants.
5572 25. If more than two messages were waiting for the same host, and a transport
5573 filter was specified for the transport, Exim sent two messages over the
5574 same TCP/IP connection, and then failed with "socket operation on non-
5575 socket" when it tried to send the third.
5577 26. Added Exim::debug_write and Exim::log_write for embedded Perl use.
5579 27. The extern definition of crypt16() in expand.c was not being excluded when
5580 the OS had its own crypt16() function.
5582 28. Added bounce_return_body as a new option, and bounce_return_size_limit
5583 as a preferred synonym for return_size_limit, both as an option and as an
5586 29. Added LIBS=-liconv to OS/Makefile-OSF1.
5588 30. Changed the default configuration ACL to relax the local part checking rule
5589 for addresses that are not in any local domains. For these addresses,
5590 slashes and pipe symbols are allowed within local parts, but the sequence
5591 /../ is explicitly forbidden.
5593 31. SPA server authentication was not clearing the challenge buffer before
5596 32. log_message in a "warn" ACL statement was writing to the reject log as
5597 well as to the main log, which contradicts the documentation and doesn't
5598 seem right (because no rejection is happening). So I have stopped it.
5600 33. Added Ard Biesheuvel's lookup code for accessing an Interbase database.
5601 However, I am unable to do any testing of this.
5603 34. Fixed an infelicity in the appendfile transport. When checking directories
5604 for a mailbox, to see if any needed to be created, it was accidentally
5605 using path names with one or more superfluous leading slashes; tracing
5606 would show up entries such as stat("///home/ph10", 0xFFBEEA48).
5608 35. If log_message is set on a "discard" verb in a MAIL or RCPT ACL, its
5609 contents are added to the log line that is written for every discarded
5610 recipient. (Previously a log_message setting was ignored.)
5612 36. The ${quote: operator now quotes the string if it is empty.
5614 37. The install script runs exim in order to find its version number. If for
5615 some reason other than non-existence or emptiness, which it checks, it
5616 could not run './exim', it was installing it with an empty version number,
5617 i.e. as "exim-". This error state is now caught, and the installation is
5620 38. An argument was missing from the function that creates an error message
5621 when Exim fails to connect to the socket for saslauthd authentication.
5622 This could cause Exim to crash, or give a corrupted message.
5624 39. Added isip, isip4, and isip6 to ${if conditions.
5626 40. The ACL variables $acl_xx are now saved with the message, and can be
5627 accessed later in routers, transports, and filters.
5629 41. The new lookup type nwildlsearch is like wildlsearch, except that the key
5630 strings in the file are not string-expanded.
5632 42. If a MAIL command specified a SIZE value that was too large to fit into an
5633 int variable, the check against message_size_limit failed. Such values are
5634 now forced to INT_MAX, which is around 2Gb for a 32-bit variable. Maybe one
5635 day this will have to be increased, but I don't think I want to be around
5636 when emails are that large.
5643 1. Removed HAVE_ICONV=yes from OS/Makefile-FreeBSD, since it seems that
5644 iconv() is not standard in FreeBSD.
5646 2. Change 4.21/17 was buggy and could cause stack overwriting on a system with
5647 IPv6 enabled. The observed symptom was a segmentation fault on return from
5648 the function os_common_find_running_interfaces() in src/os.c.
5650 3. In the check_special_case() function in daemon.c I had used "errno" as an
5651 argument name, which causes warnings on some systems. This was basically a
5652 typo, since it was named "eno" in the comments!
5654 4. The code that waits for the clock to tick (at a resolution of some fraction
5655 of a second) so as to ensure message-id uniqueness was always waiting for
5656 at least one whole tick, when it could have waited for less. [This is
5657 almost certainly not relevant at current processor speeds, where it is
5658 unlikely to ever wait at all. But we try to future-proof.]
5660 5. The function that sleeps for a time interval that includes fractions of a
5661 second contained a race. It did not block SIGALRM between setting the
5662 timer, and suspending (a couple of lines later). If the interval was short
5663 and the sigsuspend() was delayed until after it had expired, the suspension
5664 never ended. On busy systems this could lead to processes getting stuck for
5667 6. Some uncommon configurations may cause a lookup to happen in a queue runner
5668 process, before it forks any delivery processes. The open lookup caching
5669 mechanism meant that the open file or database connection was passed into
5670 the delivery process. The problem was that delivery processes always tidy
5671 up cached lookup data. This could cause a problem for the next delivery
5672 process started by the queue runner, because the external queue runner
5673 process does not know about the closure. So the next delivery process
5674 still has data in the lookup cache. In the case of a file lookup, there was
5675 no problem because closing a file descriptor in a subprocess doesn't affect
5676 the parent. However, if the lookup was caching a connection to a database,
5677 the connection was closed, and the second delivery process was likely to
5678 see errors such as "PGSQL: query failed: server closed the connection
5679 unexpectedly". The problem has been fixed by closing all cached lookups
5680 in a queue runner before running a delivery process.
5682 7. Compiler warning on Linux for the second argument of iconv(), which doesn't
5683 seem to have the "const" qualifier which it has on other OS. I've
5686 8. Change 4.21/2 was too strict. It is only if there are two authenticators
5687 *of the same type* (client or server) with the same public name that an
5688 error should be diagnosed.
5690 9. When Exim looked up a host name for an IP address, but failed to find the
5691 original IP address when looking up the host name (a safety check), it
5692 output the message "<ip address> does not match any IP for NULL", which was
5693 confusing, to say the least. The bug was that the host name should have
5694 appeared instead of "NULL".
5696 10. Since release 3.03, if Exim is called by a uid other than root or the Exim
5697 user that is built into the binary, and the -C or -D options is used, root
5698 privilege is dropped before the configuration file is read. In addition,
5699 logging is switched to stderr instead of the normal log files. If the
5700 configuration then re-defines the Exim user, the unprivileged environment
5701 is probably not what is expected, so Exim logs a panic warning message (but
5704 However, if deliver_drop_privilege is set, the unprivileged state may well
5705 be exactly what is intended, so the warning has been cut out in that case,
5706 and Exim is allowed to try to write to its normal log files.
5712 1. smtp_return_error_details was not giving details for temporary sender
5713 or receiver verification errors.
5715 2. Diagnose a configuration error if two authenticators have the same public
5718 3. Exim used not to create the message log file for a message until the first
5719 delivery attempt. This could be confusing when incoming messages were held
5720 for policy or load reasons. The message log file is now created at the time
5721 the message is received, and an initial "Received" line is written to it.
5723 4. The automatically generated man page for command line options had a minor
5724 bug that caused no ill effects; however, a more serious problem was that
5725 the procedure for building the man page automatically didn't always
5726 operate. Consequently, release 4.20 contains an out-of-date version. This
5727 shouldn't happen again.
5729 5. When building Exim with embedded Perl support, the script that builds the
5730 Makefile was calling 'perl' to find its compile-time parameters, ignoring
5731 any setting of PERL_COMMAND in Local/Makefile. This is now fixed.
5733 6. The freeze_tell option was not being used for messages that were frozen on
5734 arrival, either by an ACL or by local_scan().
5736 7. Added the smtp_incomplete_transaction log selector.
5738 8. After STARTTLS, Exim was not forgetting that it had advertised AUTH, so it
5739 was accepting AUTH without a new EHLO.
5741 9. Added tls_remember_esmtp to cope with YAEB. This allows AUTH and other
5742 ESMTP extensions after STARTTLS without a new EHLO, in contravention of the
5745 10. Logging of TCP/IP connections (when configured) now happens in the main
5746 daemon process instead of the child process, so that the TCP/IP connection
5747 count is more accurate (but it can never be perfect).
5749 11. The use of "drop" in a nested ACL was not being handled correctly in the
5750 outer ACL. Now, if condition failure induced by the nested "drop" causes
5751 the outer ACL verb to deny access ("accept" or "discard" after "endpass",
5752 or "require"), the connection is dropped.
5754 12. Similarly, "discard" in a nested ACL wasn't being handled. A nested ACL
5755 that yield "discard" can now be used with an "accept" or a "discard" verb,
5756 but an error is generated for any others (because I can't see a useful way
5757 to define what should happen).
5759 13. When an ACL is read dynamically from a file (or anywhere else), the lines
5760 are now processed in the same way as lines in the Exim configuration file.
5761 In particular, continuation lines are supported.
5763 14. Added the "dnslists = a.b.c!=n.n.n.n" feature.
5765 15. Added -ti meaning -t -i.
5767 16. Check for letters, digits, hyphens, and dots in the names of dnslist
5768 domains, and warn by logging if others are found.
5770 17. At least on BSD, alignment is not guarenteed for the array of ifreq's
5771 returned from GIFCONF when Exim is trying to find the list of interfaces on
5772 a host. The code in os.c has been modified to copy each ifreq to an aligned
5773 structure in all cases.
5775 Also, in some cases, the returned ifreq's were being copied to a 'struct
5776 ifreq' on the stack, which was subsequently passed to host_ntoa(). That
5777 means the last couple of bytes of an IPv6 address could be chopped if the
5778 ifreq contained only a normal sockaddr (14 bytes storage).
5780 18. Named domain lists were not supported in the hosts_treat_as_local option.
5781 An entry such as +xxxx was not recognized, and was treated as a literal
5784 19. Ensure that header lines added by a DATA ACL are included in the reject log
5785 if the ACL subsequently rejects the message.
5787 20. Upgrade the cramtest.pl utility script to use Digest::MD5 instead of just
5788 MD5 (which is deprecated).
5790 21. When testing a filter file using -bf, Exim was writing a message when it
5791 took the sender from a "From " line in the message, but it was not doing so
5792 when it took $return_path from a Return-Path: header line. It now does.
5794 22. If the contents of a "message" modifier for a "warn" ACL verb do not begin
5795 with a valid header line field name (a series of printing characters
5796 terminated by a colon, Exim now inserts X-ACL-Warn: at the beginning.
5798 23. Changed "disc" in the source to "disk" to conform to the documentation and
5799 the book and for uniformity.
5801 24. Ignore Sendmail's -Ooption=value command line item.
5803 25. When execve() failed while trying to run a command in a pipe transport,
5804 Exim was returning EX_UNAVAILBLE (69) from the subprocess. However, this
5805 could be confused with a return value of 69 from the command itself. This
5806 has been changed to 127, the value the shell returns if it is asked to run
5807 a non-existent command. The wording for the related log line suggests a
5808 non-existent command as the problem.
5810 26. If received_header_text expands to an empty string, do not add a Received:
5811 header line to the message. (Well, it adds a token one on the spool, but
5812 marks it "old" so that it doesn't get used or transmitted.)
5814 27. Installed eximstats 1.28 (addition of -nt option).
5816 28. There was no check for failure on the call to getsockname() in the daemon
5817 code. This can fail if there is a shortage of resources on the system, with
5818 ENOMEM, for example. A temporary error is now given on failure.
5820 29. Contrary to the C standard, it seems that in some environments, the
5821 equivalent of setlocale(LC_ALL, "C") is not obeyed at the start of a C
5822 program. Exim now does this explicitly; it affects the formatting of
5823 timestamps using strftime().
5825 30. If exiqsumm was given junk data, it threw up some uninitialized variable
5826 complaints. I've now initialized all the variables, to avoid this.
5828 32. Header lines added by a system filter were not being "seen" during
5829 transport-time rewrites.
5831 33. The info_callback() function passed to OpenSSL is set up with type void
5832 (*)(SSL *, int, int), as described somewhere. However, when calling the
5833 function (actually a macro) that sets it up, the type void(*)() is
5834 expected. I've put in a cast to prevent warnings from picky compilers.
5836 34. If a DNS black list lookup found a CNAME record, but there were no A
5837 records associated with the domain it pointed at, Exim crashed.
5839 35. If a DNS black list lookup returned more than one A record, Exim ignored
5840 all but the first. It now scans all returned addresses if a particular IP
5841 value is being sought. In this situation, the contents of the
5842 $dnslist_value variable are a list of all the addresses, separated by a
5845 36. Tightened up the rules for host name lookups using reverse DNS. Exim used
5846 to accept a host name and all its aliases if the forward lookup for any of
5847 them yielded the IP address of the incoming connection. Now it accepts only
5848 those names whose forward lookup yields the correct IP address. Any other
5849 names are discarded. This closes a loophole whereby a rogue DNS
5850 administrator could create reverse DNS records to break through a
5851 wildcarded host restriction in an ACL.
5853 37. If a user filter or a system filter that ran in a subprocess used any of
5854 the numerical variables ($1, $2 etc), or $thisaddress, in a pipe command,
5855 the wrong values were passed to the pipe command ($thisaddress had the
5856 value of $0, $0 had the value of $1, etc). This bug was introduced by
5857 change 4.11/101, and not discovered because I wrote an inadequate test. :-(
5859 38. Improved the line breaking for long SMTP error messages from ACLs.
5860 Previously, if there was no break point between 40 and 75 characters, Exim
5861 left the rest of the message alone. Two changes have been made: (a) I've
5862 reduced the minimum length to 35 characters; (b) if it can't find a break
5863 point between 35 and 75 characters, it looks ahead and uses the first one
5864 that it finds. This may give the occasional overlong line, but at least the
5865 remaining text gets split now.
5867 39. Change 82 of 4.11 was unimaginative. It assumed the limit on the number of
5868 file descriptors might be low, and that setting 1000 would always raise it.
5869 It turns out that in some environments, the limit is already over 1000 and
5870 that lowering it causes trouble. So now Exim takes care not to decrease it.
5872 40. When delivering a message, the value of $return_path is set to $sender_
5873 address at the start of routing (routers may change the value). By an
5874 oversight, this default was not being set up when an address was tested by
5875 -bt or -bv, which affected the outcome if any router or filter referred to
5878 41. The idea of the "warn" ACL verb is that it adds a header or writes to the
5879 log only when "message" or "log_message" are set. However, if one of the
5880 conditions was an address verification, or a call to a nested ACL, the
5881 messages generated by the underlying test were being passed through. This
5882 no longer happens. The underlying message is available in $acl_verify_
5883 message for both "message" and "log_message" expansions, so it can be
5884 passed through if needed.
5886 42. Added RFC 2047 interpretation of header lines for $h_ expansions, with a
5887 new expansion $bh_ to give the encoded byte string without charset
5888 translation. Translation happens only if iconv() is available; HAVE_ICONV
5889 indicates this at build time. HEADERS_CHARSET gives the charset to
5890 translate to; headers_charset can change it in the configuration, and
5891 "headers charset" can change it in an individual filter file.
5893 43. Now that we have a default RFC 2047 charset (see above), the code in Exim
5894 that creates RFC 2047 encoded "words" labels them as that charset instead
5895 of always using iso-8859-1. The cases are (i) the explicit ${rfc2047:
5896 expansion operator; (ii) when Exim creates a From: line for a local
5897 message; (iii) when a header line is rewritten to include a "phrase" part.
5899 44. Nasty bug in exiqsumm: the regex to skip already-delivered addresses was
5900 buggy, causing it to skip the first lines of messages whose message ID
5901 ended in 'D'. This would not have bitten before Exim release 4.14, because
5902 message IDs were unlikely to end in 'D' before then. The effect was to have
5903 incorrect size information for certain domains.
5905 45. #include "config.h" was missing at the start of the crypt16.c module. This
5906 caused trouble on Tru64 (aka OSF1) systems, because HAVE_CRYPT16 was not
5909 46. If there was a timeout during a "random" callout check, Exim treated it as
5910 a failure of the random address, and carried on sending RSET and the real
5911 address. If the delay was just some slowness somewhere, the response to the
5912 original RCPT would be taken as a response to RSET and so on, causing
5913 mayhem of various kinds.
5915 47. Change 50 for 4.20 was a heap of junk. I don't know what I was thinking
5916 when I implemented it. It didn't allow for the fact that some option values
5917 may legitimatetly be negative (e.g. size_addition), and it didn't even do
5918 the right test for positive values.
5920 48. Domain names in DNS records are case-independent. Exim always looks them up
5921 in lower case. Some resolvers return domain names in exactly the case they
5922 appear in the zone file, that is, they may contain uppercase letters. Not
5923 all resolvers do this - some return always lower case. Exim was treating a
5924 change of case by a resolver as a change of domain, similar to a widening
5925 of a domain abbreviation. This triggered its re-routing code and so it was
5926 trying to route what was effectively the same domain again. This normally
5927 caused routing to fail (because the router wouldn't handle the domain
5928 twice). Now Exim checks for this case specially, and just changes the
5929 casing of the domain that it ultimately uses when it transmits the message
5932 49. Added Sieve (RFC 3028) support, courtesy of Michael Haardt's contributed
5935 50. If a filter generated a file delivery with a non-absolute name (possible if
5936 no home directory exists for the router), the forbid_file option was not
5939 51. Added '&' feature to dnslists, to provide bit mask matching in addition to
5940 the existing equality matching.
5942 52. Exim was using ints instead of ino_t variables in some places where it was
5943 dealing with inode numbers.
5945 53. If TMPDIR is defined in Local/Makefile (default in src/EDITME is
5946 TMPDIR="/tmp"), Exim checks for the presence of an environment variable
5947 called TMPDIR, and if it finds it is different, it changes its value.
5949 54. The smtp_printf() function is now made available to local_scan() so
5950 additional output lines can be written before returning. There is also an
5951 smtp_fflush() function to enable the detection of a dropped connection.
5952 The variables smtp_input and smtp_batched_input are exported to
5955 55. Changed the default runtime configuration: the message "Unknown user"
5956 has been removed from the ACL, and instead placed on the localuser router,
5957 using the cannot_route_message feature. This means that any verification
5958 failures that generate their own messages won't get overridden. Similarly,
5959 the "Unrouteable address" message that was in the ACL for unverifiable
5960 relay addresses has also been removed.
5962 56. Added hosts_avoid_esmtp to the smtp transport.
5964 57. The exicyclog script was not checking for the esoteric option
5965 CONFIGURE_FILE_USE_EUID in the Local/Makefile. It now does this, but it
5966 will work only if exicyclog is run under the appropriate euid.
5968 58. Following a discussion on the list, the rules by which Exim recognises line
5969 endings on incoming messages have been changed. The -dropcr and drop_cr
5970 options are now no-ops, retained only for backwards compatibility. The
5971 following line terminators are recognized: LF CRLF CR. However, special
5972 processing applies to CR:
5974 (i) The sequence CR . CR does *not* terminate an incoming SMTP message,
5975 nor a local message in the state where . is a terminator.
5977 (ii) If a bare CR is encountered in a header line, an extra space is added
5978 after the line terminator so as not to end the header. The reasoning
5979 behind this is that bare CRs in header lines are most likely either
5980 to be mistakes, or people trying to play silly games.
5982 59. The size of a message, as listed by "-bp" or in the Exim monitor window,
5983 was being incorrectly given as 18 bytes larger than it should have been.
5984 This is a VOB (very old bug).
5986 60. This may never have affected anything current, but just in case it has:
5987 When the local host is found other than at the start of a list of hosts,
5988 the local host, those with the same MX, and any that follow, are discarded.
5989 When the list in question was part of a longer list of hosts, the following
5990 hosts (not currently being processed) were also being discarded. This no
5991 longer happens. I'm not sure if this situation could ever has previously
5994 61. Added the "/MX" feature to lists of hosts in the manualroute and query
5997 62. Whenever Exim generates a new message, it now adds an Auto-Submitted:
5998 header. This is something that is recommended in a new Internet Draft, and
5999 is something that is documented as being done by Sendmail. There are two
6000 possible values. For messages generated by the autoreply transport, Exim
6003 Auto-Submitted: auto-replied
6005 whereas for all other generated messages (e.g. bounces) it adds
6007 Auto-Submitted: auto-generated
6009 63. The "personal" condition in filters now includes a test for the
6010 Auto-Submitted: header. If it contains the string "auto-" the message it
6011 not considered personal.
6013 64. Added rcpt_include_affixes as a generic transport option.
6015 65. Added queue_only_override (default true).
6017 66. Added the syslog_duplication option.
6019 67. If what should have been the first header line of a message consisted of
6020 a space followed by a colon, Exim was mis-interpreting it as a header line.
6021 It isn't of course - it is syntactically invalid and should therefore be
6022 treated as the start of the message body. The misbehaviour could have
6023 caused a number of strange effects, including loss of data in subsequent
6024 header lines, and spool format errors.
6026 68. Formerly, the AUTH parameter on a MAIL command was trusted only if the
6027 client host had authenticated. This control can now be exercised by an ACL
6028 for more flexibility.
6030 69. By default, callouts do not happen when testing with -bh. There is now a
6031 variant, -bhc, which does actually run the callout code, including
6032 consulting and updating the callout cache.
6034 70. Added support for saslauthd authentication, courtesy of Alexander
6037 71. If statvfs() failed on the spool or log directories while checking their
6038 size for availability, Exim confusingly gave the error "space shortage".
6039 Furthermore, in debugging mode it crashed with a floating point exception.
6040 These checks are done if check_{spool,log}_{space,inodes} are set, and when
6041 an SMTP message arrives with SIZE= on the MAIL command. As this is a really
6042 serious problem, Exim now writes to the main and panic logs when this
6043 happens, with details of the failure. It then refuses to accept the
6044 incoming message, giving the message "spool directory problem" or "log
6045 directory problem" with a 421 code for SMTP messages.
6047 72. When Exim is about to re-exec itself, it ensures that the file descriptors
6048 0, 1, and 2 exist, because some OS complain for execs without them (see
6049 ChangeLog 4.05/30). If necessary, Exim opens /dev/null to use for these
6050 descriptors. However, the code omitted to check that the open succeeded,
6051 causing mysterious errors if for some reason the permissions on /dev/null
6052 got screwed. Now Exim writes a message to the main and panic logs, and
6053 bombs out if it can't open /dev/null.
6055 73. Re-vamped the way daemon_smtp_port, local_interfaces, and -oX work and
6056 interact so that it is all more flexible. It is supposed to remain
6057 backwards compatible. Also added extra_local_interfaces.
6059 74. Invalid data sent to a SPA (NTLM) server authenticator could cause the code
6060 to bomb out with an assertion failure - to the client this appears as a
6061 connection drop. This problem occurs in the part of the code that was taken
6062 from the Samba project. Fortunately, the assertion is in a very simple
6063 function, so I have fixed this by reproducing the function inline in the
6064 one place where it is called, and arranging for authentication to fail
6065 instead of killing the process with assert().
6067 75. The SPA client code was not working when the server requested OEM rather
6068 than Unicode encoding.
6070 76. Added code to make require_files with a specific uid setting more usable in
6071 the case where statting the file as root fails - usually a non-root-mounted
6072 NFS file system. When this happens and the failure is EACCES, Exim now
6073 forks a subprocess and does the per-uid checking as the relevant uid.
6075 77. Added process_log_path.
6077 78. If log_file_path was not explicitly set, a setting of check_log_space or
6078 check_log_inodes was ignored.
6080 79. If a space check for the spool or log partitions fails, the incident is now
6081 logged. Of course, in the latter case the data may get lost...
6083 80. Added the %p formatting code to string_format() so that it can be used to
6084 print addresses in debug_print(). Adjusted all the address printing in the
6085 debugging in store.c to use %p rather than %d.
6087 81. There was a concern that a line of code in smtp_in.c could overflow a
6088 buffer if a HELO/EHLO command was given followed by 500 or so spaces. As
6089 initially expressed, the concern was not well-founded, because trailing
6090 spaces are removed early. However, if the trailing spaces were followed by
6091 a NULL, they did not get removed, so the overflow was possible. Two fixes
6094 (a) I re-wrote the offending code in a cleaner fashion.
6095 (b) If an incoming SMTP command contains a NULL character, it is rejected
6098 82. When Exim changes uid/gid to the Exim user at daemon start time, it now
6099 runs initgroups(), so that if the Exim user is in any additional groups,
6100 they will be used during message reception.
6106 The change log for 4.20 and earlier releases has been archived.
projects / exim.git / blob