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.
18 TL/01 Bugzilla 1506: Re-add a 'return NULL' to silence complaints from static
19 checkers that were complaining about end of non-void function with no
26 TF/01 Correctly close the server side of TLS when forking for delivery.
28 When a message was received over SMTP with TLS, Exim failed to clear up
29 the incoming connection properly after forking off the child process to
30 deliver the message. In some situations the subsequent outgoing
31 delivery connection happened to have the same fd number as the incoming
32 connection previously had. Exim would try to use TLS and fail, logging
33 a "Bad file descriptor" error.
35 TF/02 Portability fix for building lookup modules on Solaris when the xpg4
36 utilities have not been installed.
38 JH/01 Fix memory-handling in use of acl as a conditional; avoid free of
39 temporary space as the ACL may create new global variables.
41 TL/01 LDAP support uses per connection or global context settings, depending
42 upon the detected version of the libraries at build time.
44 TL/02 Experimental Proxy Protocol support: allows a proxied SMTP connection
45 to extract and use the src ip:port in logging and expansions as if it
46 were a direct connection from the outside internet. PPv2 support was
47 updated based on HAProxy spec change in May 2014.
49 JH/02 Add ${listextract {number}{list}{success}{fail}}.
51 TL/03 Bugzilla 1433: Fix DMARC SEGV with specific From header contents.
52 Properly escape header and check for NULL return.
54 PP/01 Continue incomplete 4.82 PP/19 by fixing docs too: use dns_dnssec_ok
57 JH/03 Bugzilla 1157: support log_selector smtp_confirmation for lmtp.
59 TL/04 Add verify = header_names_ascii check to reject email with non-ASCII
60 characters in header names, implemented as a verify condition.
61 Contributed by Michael Fischer v. Mollard.
63 TL/05 Rename SPF condition results err_perm and err_temp to standardized
64 results permerror and temperror. Previous values are deprecated but
65 still accepted. In a future release, err_perm and err_temp will be
66 completely removed, which will be a backward incompatibility if the
67 ACL tests for either of these two old results. Patch contributed by
68 user bes-internal on the mailing list.
70 JH/04 Add ${utf8clean:} operator. Contributed by Alex Rau.
72 JH/05 Bugzilla 305: Log incoming-TLS details on rejects, subject to log
73 selectors, in both main and reject logs.
75 JH/06 Log outbound-TLS and port details, subject to log selectors, for a
78 JH/07 Add malware type "sock" for talking to simple daemon.
80 JH/08 Bugzilla 1371: Add tls_{,try_}verify_hosts to smtp transport.
82 JH/09 Bugzilla 1431: Support (with limitations) headers_add/headers_remove in
83 routers/transports under cutthrough routing.
85 JH/10 Bugzilla 1005: ACL "condition =" should accept values which are negative
86 numbers. Touch up "bool" conditional to keep the same definition.
88 TL/06 Remove duplicated language in spec file from 4.82 TL/16.
90 JH/11 Add dnsdb tlsa lookup. From Todd Lyons.
92 JH/12 Expand items in router/transport headers_add or headers_remove lists
93 individually rather than the list as a whole. Bug 1452.
95 Required for reasonable handling of multiple headers_ options when
96 they may be empty; requires that headers_remove items with embedded
97 colons must have them doubled (or the list-separator changed).
99 TL/07 Add new dmarc expansion variable $dmarc_domain_policy to directly
100 view the policy declared in the DMARC record. Currently, $dmarc_status
101 is a combined value of both the record presence and the result of the
104 JH/13 Fix handling of $tls_cipher et.al. in (non-verify) transport. Bug 1455.
106 JH/14 New options dnssec_request_domains, dnssec_require_domains on the
107 dnslookup router and the smtp transport (applying to the forward
110 TL/08 Bugzilla 1453: New LDAP "SERVERS=" option allows admin to override list
111 of ldap servers used for a specific lookup. Patch provided by Heiko
114 JH/18 New options dnssec_lax, dnssec_strict on dnsdb lookups.
115 New variable $lookup_dnssec_authenticated for observability.
117 TL/09 Bugzilla 609: Add -C option to exiqgrep, specify which exim.conf to use.
118 Patch submitted by Lars Timman.
120 JH/19 EXPERIMENTAL_OCSP support under GnuTLS. Bug 1459.
122 TL/10 Bugzilla 1454: New -oMm option to pass message reference to Exim.
123 Requires trusted mode and valid format message id, aborts otherwise.
124 Patch contributed by Heiko Schlichting.
126 JH/20 New expansion variables tls_(in,out)_(our,peer)cert, and expansion item
127 certextract with support for various fields. Bug 1358.
129 JH/21 Observability of OCSP via variables tls_(in,out)_ocsp. Stapling
130 is requested by default, modifiable by smtp transport option
133 JH/22 Expansion operators ${md5:string} and ${sha1:string} can now
134 operate on certificate variables to give certificate fingerprints
135 Also new ${sha256:cert_variable}.
137 JH/23 The PRDR feature is moved from being Experimental into the mainline.
139 TL/11 Bug 1119: fix memory allocation in string_printing2(). Patch from
140 Christian Aistleitner.
142 JH/24 The OCSP stapling feature is moved from Experimental into the mainline.
144 TL/12 Bug 1444: Fix improper \r\n sequence handling when writing spool
145 file. Patch from Wolfgang Breyha.
147 JH/25 Expand the coverage of the delivery $host and $host_address to
148 client authenticators run in verify callout. Bug 1476.
150 JH/26 Port service names are now accepted for tls_on_connect_ports, to
151 align with daemon_smtp_ports. Bug 72.
153 TF/03 Fix udpsend. The ip_connectedsocket() function's socket type
154 support and error reporting did not work properly.
156 TL/13 Bug 1495: Exiqgrep check if -C config file specified on cli exists
157 and is readable. Patch from Andrew Colin Kissa.
159 TL/14 Enhance documentation of ${run expansion and how it parses the
160 commandline after expansion, particularly in the case when an
161 unquoted variable expansion results in an empty value.
163 JH/27 The TLS SNI feature was broken in 4.82. Fix it.
165 PP/02 Fix internal collision of T_APL on systems which support RFC3123
166 by renaming away from it. Addresses GH issue 15, reported by
169 JH/28 Fix parsing of MIME headers for parameters with quoted semicolons.
171 TL/15 SECURITY: prevent double expansion in math comparison functions
172 (can expand unsanitized data). Not remotely exploitable.
179 PP/01 Add -bI: framework, and -bI:sieve for querying sieve capabilities.
181 PP/02 Make -n do something, by making it not do something.
182 When combined with -bP, the name of an option is not output.
184 PP/03 Added tls_dh_min_bits SMTP transport driver option, only honoured
187 PP/04 First step towards DNSSEC, provide $sender_host_dnssec for
188 $sender_host_name and config options to manage this, and basic check
191 PP/05 DSCP support for outbound connections and control modifier for inbound.
193 PP/06 Cyrus SASL: set local and remote IP;port properties for driver.
194 (Only plugin which currently uses this is kerberos4, which nobody should
195 be using, but we should make it available and other future plugins might
196 conceivably use it, even though it would break NAT; stuff *should* be
197 using channel bindings instead).
199 PP/07 Handle "exim -L <tag>" to indicate to use syslog with tag as the process
200 name; added for Sendmail compatibility; requires admin caller.
201 Handle -G as equivalent to "control = suppress_local_fixups" (we used to
202 just ignore it); requires trusted caller.
203 Also parse but ignore: -Ac -Am -X<logfile>
206 TL/01 Bugzilla 1258 - Refactor MAIL FROM optional args processing.
208 TL/02 Add +smtp_confirmation as a default logging option.
210 TL/03 Bugzilla 198 - Implement remove_header ACL modifier.
211 Patch by Magnus Holmgren from 2007-02-20.
213 TL/04 Bugzilla 1281 - Spec typo.
214 Bugzilla 1283 - Spec typo.
215 Bugzilla 1290 - Spec grammar fixes.
217 TL/05 Bugzilla 1285 - Spec omission, fix docbook errors for spec.txt creation.
219 TL/06 Add Experimental DMARC support using libopendmarc libraries.
221 TL/07 Fix an out of order global option causing a segfault. Reported to dev
222 mailing list by by Dmitry Isaikin.
224 JH/01 Bugzilla 1201 & 304 - New cutthrough-delivery feature, with TLS support.
226 JH/02 Support "G" suffix to numbers in ${if comparisons.
228 PP/08 Handle smtp transport tls_sni option forced-fail for OpenSSL.
230 NM/01 Bugzilla 1197 - Spec typo
231 Bugzilla 1196 - Spec examples corrections
233 JH/03 Add expansion operators ${listnamed:name} and ${listcount:string}
235 PP/09 Add gnutls_allow_auto_pkcs11 option (was originally called
236 gnutls_enable_pkcs11, but renamed to more accurately indicate its
239 PP/10 Let Linux makefile inherit CFLAGS/CFLAGS_DYNAMIC.
240 Pulled from Debian 30_dontoverridecflags.dpatch by Andreas Metzler.
242 JH/04 Add expansion item ${acl {name}{arg}...}, expansion condition
243 "acl {{name}{arg}...}", and optional args on acl condition
246 JH/05 Permit multiple router/transport headers_add/remove lines.
248 JH/06 Add dnsdb pseudo-lookup "a+" to do an "aaaa" + "a" combination.
250 JH/07 Avoid using a waiting database for a single-message-only transport.
251 Performance patch from Paul Fisher. Bugzilla 1262.
253 JH/08 Strip leading/trailing newlines from add_header ACL modifier data.
256 JH/09 Add $headers_added variable, with content from use of ACL modifier
257 add_header (but not yet added to the message). Bugzilla 199.
259 JH/10 Add 8bitmime log_selector, for 8bitmime status on the received line.
260 Pulled from Bugzilla 817 by Wolfgang Breyha.
262 PP/11 SECURITY: protect DKIM DNS decoding from remote exploit.
264 (nb: this is the same fix as in Exim 4.80.1)
266 JH/11 Add A= logging on delivery lines, and a client_set_id option on
269 JH/12 Add optional authenticated_sender logging to A= and a log_selector
272 PP/12 Unbreak server_set_id for NTLM/SPA auth, broken by 4.80 PP/29.
274 PP/13 Dovecot auth: log better reason to rejectlog if Dovecot did not
275 advertise SMTP AUTH mechanism to us, instead of a generic
276 protocol violation error. Also, make Exim more robust to bad
277 data from the Dovecot auth socket.
279 TF/01 Fix ultimate retry timeouts for intermittently deliverable recipients.
281 When a queue runner is handling a message, Exim first routes the
282 recipient addresses, during which it prunes them based on the retry
283 hints database. After that it attempts to deliver the message to
284 any remaining recipients. It then updates the hints database using
287 So if a recipient address works intermittently, it can get repeatedly
288 deferred at routing time. The retry hints record remains fresh so the
289 address never reaches the final cutoff time.
291 This is a fairly common occurrence when a user is bumping up against
292 their storage quota. Exim had some logic in its local delivery code
293 to deal with this. However it did not apply to per-recipient defers
294 in remote deliveries, e.g. over LMTP to a separate IMAP message store.
296 This change adds a proper retry rule check during routing so that the
297 final cutoff time is checked against the message's age. We only do
298 this check if there is an address retry record and there is not a
299 domain retry record; this implies that previous attempts to handle
300 the address had the retry_use_local_parts option turned on. We use
301 this as an approximation for the destination being like a local
302 delivery, as in LMTP.
304 I suspect this new check makes the old local delivery cutoff check
305 redundant, but I have not verified this so I left the code in place.
307 TF/02 Correct gecos expansion when From: is a prefix of the username.
309 Test 0254 submits a message to Exim with the header
313 When I ran the test suite under the user fanf2, Exim expanded
314 the header to contain my full name, whereas it should have added
315 a Resent-Sender: header. It erroneously treats any prefix of the
316 username as equal to the username.
318 This change corrects that bug.
320 GF/01 DCC debug and logging tidyup
321 Error conditions log to paniclog rather than rejectlog.
322 Debug lines prefixed by "DCC: " to remove any ambiguity.
324 TF/03 Avoid unnecessary rebuilds of lookup-related code.
326 PP/14 Fix OCSP reinitialisation in SNI handling for Exim/TLS as server.
327 Bug spotted by Jeremy Harris; was flawed since initial commit.
328 Would have resulted in OCSP responses post-SNI triggering an Exim
329 NULL dereference and crash.
331 JH/13 Add $router_name and $transport_name variables. Bugzilla 308.
333 PP/15 Define SIOCGIFCONF_GIVES_ADDR for GNU Hurd.
334 Bug detection, analysis and fix by Samuel Thibault.
335 Bugzilla 1331, Debian bug #698092.
337 SC/01 Update eximstats to watch out for senders sending 'HELO [IpAddr]'
339 JH/14 SMTP PRDR (http://www.eric-a-hall.com/specs/draft-hall-prdr-00.txt).
340 Server implementation by Todd Lyons, client by JH.
341 Only enabled when compiled with EXPERIMENTAL_PRDR. A new
342 config variable "prdr_enable" controls whether the server
343 advertises the facility. If the client requests PRDR a new
344 acl_data_smtp_prdr ACL is called once for each recipient, after
345 the body content is received and before the acl_smtp_data ACL.
346 The client is controlled by bolth of: a hosts_try_prdr option
347 on the smtp transport, and the server advertisement.
348 Default client logging of deliveries and rejections involving
349 PRDR are flagged with the string "PRDR".
351 PP/16 Fix problems caused by timeouts during quit ACLs trying to double
352 fclose(). Diagnosis by Todd Lyons.
354 PP/17 Update configure.default to handle IPv6 localhost better.
355 Patch by Alain Williams (plus minor tweaks).
358 PP/18 OpenSSL made graceful with empty tls_verify_certificates setting.
359 This is now consistent with GnuTLS, and is now documented: the
360 previous undocumented portable approach to treating the option as
361 unset was to force an expansion failure. That still works, and
362 an empty string is now equivalent.
364 PP/19 Renamed DNSSEC-enabling option to "dns_dnssec_ok", to make it
365 clearer that Exim is using the DO (DNSSEC OK) EDNS0 resolver flag,
366 not performing validation itself.
368 PP/20 Added force_command boolean option to pipe transport.
369 Patch from Nick Koston, of cPanel Inc.
371 JH/15 AUTH support on callouts (and hence cutthrough-deliveries).
374 TF/04 Added udpsend ACL modifer and hexquote expansion operator
376 PP/21 Fix eximon continuous updating with timestamped log-files.
377 Broken in a format-string cleanup in 4.80, missed when I repaired the
378 other false fix of the same issue.
379 Report and fix from Heiko Schlichting.
382 PP/22 Guard LDAP TLS usage against Solaris LDAP variant.
383 Report from Prashanth Katuri.
385 PP/23 Support safari_ecdhe_ecdsa_bug for openssl_options.
386 It's SecureTransport, so affects any MacOS clients which use the
387 system-integrated TLS libraries, including email clients.
389 PP/24 Fix segfault from trying to fprintf() to a NULL stdio FILE* if
390 using a MIME ACL for non-SMTP local injection.
391 Report and assistance in diagnosis by Warren Baker.
393 TL/08 Adjust exiqgrep to be case-insensitive for sender/receiver.
395 JH/16 Fix comparisons for 64b. Bugzilla 1385.
397 TL/09 Add expansion variable $authenticated_fail_id to keep track of
398 last id that failed so it may be referenced in subsequent ACL's.
400 TL/10 Bugzilla 1375 - Prevent TLS rebinding in ldap. Patch provided by
403 TL/11 Bugzilla 1382 - Option ldap_require_cert overrides start_tls
404 ldap library initialization, allowing self-signed CA's to be
405 used. Also properly sets require_cert option later in code by
406 using NULL (global ldap config) instead of ldap handle (per
407 session). Bug diagnosis and testing by alxgomz.
409 TL/12 Enhanced documentation in the ratelimit.pl script provided in
410 the src/util/ subdirectory.
412 TL/13 Bug 1031 - Imported transport SQL logging patch from Axel Rau
413 renamed to Transport Post Delivery Action by Jeremy Harris, as
416 TL/14 Bugzilla 1217 - Redis lookup support has been added. It is only enabled
417 when Exim is compiled with EXPERIMENTAL_REDIS. A new config variable
418 redis_servers = needs to be configured which will be used by the redis
419 lookup. Patch from Warren Baker, of The Packet Hub.
421 TL/15 Fix exiqsumm summary for corner case. Patch provided by Richard Hall.
423 TL/16 Bugzilla 1289 - Clarify host/ip processing when have errors looking up a
424 hostname or reverse DNS when processing a host list. Used suggestions
425 from multiple comments on this bug.
427 TL/17 Bugzilla 1057 - Multiple clamd TCP targets patch from Mark Zealey.
429 TL/18 Had previously added a -CONTINUE option to runtest in the test suite.
430 Missed a few lines, added it to make the runtest require no keyboard
433 TL/19 Bugzilla 1402 - Test 533 fails if any part of the path to the test suite
434 contains upper case chars. Make router use caseful_local_part.
436 TL/20 Bugzilla 1400 - Add AVOID_GNUTLS_PKCS11 build option. Allows GnuTLS
437 support when GnuTLS has been built with p11-kit.
443 PP/01 SECURITY: protect DKIM DNS decoding from remote exploit.
445 This, or similar/improved, will also be change PP/11 of 4.82.
451 PP/01 Handle short writes when writing local log-files.
452 In practice, only affects FreeBSD (8 onwards).
453 Bugzilla 1053, with thanks to Dmitry Isaikin.
455 NM/01 Bugzilla 949 - Documentation tweak
457 NM/02 Bugzilla 1093 - eximstats DATA reject detection regexps
460 NM/03 Bugzilla 1169 - primary_hostname spelling was incorrect in docs.
462 PP/02 Implemented gsasl authenticator.
464 PP/03 Implemented heimdal_gssapi authenticator with "server_keytab" option.
466 PP/04 Local/Makefile support for (AUTH|LOOKUP)_*_PC=foo to use
467 `pkg-config foo` for cflags/libs.
469 PP/05 Swapped $auth1/$auth2 for gsasl GSSAPI mechanism, to be more consistent
470 with rest of GSASL and with heimdal_gssapi.
472 PP/06 Local/Makefile support for USE_(GNUTLS|OPENSSL)_PC=foo to use
473 `pkg-config foo` for cflags/libs for the TLS implementation.
475 PP/07 New expansion variable $tls_bits; Cyrus SASL server connection
476 properties get this fed in as external SSF. A number of robustness
477 and debugging improvements to the cyrus_sasl authenticator.
479 PP/08 cyrus_sasl server now expands the server_realm option.
481 PP/09 Bugzilla 1214 - Log authentication information in reject log.
482 Patch by Jeremy Harris.
484 PP/10 Added dbmjz lookup type.
486 PP/11 Let heimdal_gssapi authenticator take a SASL message without an authzid.
488 PP/12 MAIL args handles TAB as well as SP, for better interop with
489 non-compliant senders.
490 Analysis and variant patch by Todd Lyons.
492 NM/04 Bugzilla 1237 - fix cases where printf format usage not indicated
493 Bug report from Lars Müller <lars@samba.org> (via SUSE),
494 Patch from Dirk Mueller <dmueller@suse.com>
496 PP/13 tls_peerdn now print-escaped for spool files.
497 Observed some $tls_peerdn in wild which contained \n, which resulted
498 in spool file corruption.
500 PP/14 TLS fixes for OpenSSL: support TLS 1.1 & 1.2; new "openssl_options"
501 values; set SSL_MODE_AUTO_RETRY so that OpenSSL will retry a read
502 or write after TLS renegotiation, which otherwise led to messages
505 TK/01 Bugzilla 1239 - fix DKIM verification when signature was not inserted
506 as a tracking header (ie: a signed header comes before the signature).
507 Patch from Wolfgang Breyha.
509 JH/01 Bugzilla 660 - Multi-valued attributes from ldap now parseable as a
510 comma-sep list; embedded commas doubled.
512 JH/02 Refactored ACL "verify =" logic to table-driven dispatch.
514 PP/15 LDAP: Check for errors of TLS initialisation, to give correct
516 Report and patch from Dmitry Banschikov.
518 PP/16 Removed "dont_insert_empty_fragments" fron "openssl_options".
519 Removed SSL_clear() after SSL_new() which led to protocol negotiation
520 failures. We appear to now support TLS1.1+ with Exim.
522 PP/17 OpenSSL: new expansion var $tls_sni, which if used in tls_certificate
523 lets Exim select keys and certificates based upon TLS SNI from client.
524 Also option tls_sni on SMTP Transports. Also clear $tls_bits correctly
525 before an outbound SMTP session. New log_selector, +tls_sni.
527 PP/18 Bugzilla 1122 - check localhost_number expansion for failure, avoid
528 NULL dereference. Report and patch from Alun Jones.
530 PP/19 DNS resolver init changes for NetBSD compatibility. (Risk of breakage
531 on less well tested platforms). Obviates NetBSD pkgsrc patch-ac.
532 Not seeing resolver debug output on NetBSD, but suspect this is a
533 resolver implementation change.
535 PP/20 Revert part of NM/04, it broke log_path containing %D expansions.
536 Left warnings. Added "eximon gdb" invocation mode.
538 PP/21 Defaulting "accept_8bitmime" to true, not false.
540 PP/22 Added -bw for inetd wait mode support.
542 PP/23 Added PCRE_CONFIG=yes support to Makefile for using pcre-config to
543 locate the relevant includes and libraries. Made this the default.
545 PP/24 Fixed headers_only on smtp transports (was not sending trailing dot).
546 Bugzilla 1246, report and most of solution from Tomasz Kusy.
548 JH/03 ${eval } now uses 64-bit and supports a "g" suffix (like to "k" and "m").
549 This may cause build issues on older platforms.
551 PP/25 Revamped GnuTLS support, passing tls_require_ciphers to
552 gnutls_priority_init, ignoring Exim options gnutls_require_kx,
553 gnutls_require_mac & gnutls_require_protocols (no longer supported).
554 Added SNI support via GnuTLS too.
555 Made ${randint:..} supplier available, if using not-too-old GnuTLS.
557 PP/26 Added EXPERIMENTAL_OCSP for OpenSSL.
559 PP/27 Applied dnsdb SPF support patch from Janne Snabb.
560 Applied second patch from Janne, implementing suggestion to default
561 multiple-strings-in-record handling to match SPF spec.
563 JH/04 Added expansion variable $tod_epoch_l for a higher-precision time.
565 PP/28 Fix DCC dcc_header content corruption (stack memory referenced,
566 read-only, out of scope).
567 Patch from Wolfgang Breyha, report from Stuart Northfield.
569 PP/29 Fix three issues highlighted by clang analyser static analysis.
570 Only crash-plausible issue would require the Cambridge-specific
571 iplookup router and a misconfiguration.
572 Report from Marcin Mirosław.
574 PP/30 Another attempt to deal with PCRE_PRERELEASE, this one less buggy.
576 PP/31 %D in printf continues to cause issues (-Wformat=security), so for
577 now guard some of the printf checks behind WANT_DEEPER_PRINTF_CHECKS.
578 As part of this, removing so much warning spew let me fix some minor
579 real issues in debug logging.
581 PP/32 GnuTLS was always using default tls_require_ciphers, due to a missing
582 assignment on my part. Fixed.
584 PP/33 Added tls_dh_max_bits option, defaulting to current hard-coded limit
585 of NSS, for GnuTLS/NSS interop. Problem root cause diagnosis by
586 Janne Snabb (who went above and beyond: thank you).
588 PP/34 Validate tls_require_ciphers on startup, since debugging an invalid
589 string otherwise requires a connection and a bunch more work and it's
590 relatively easy to get wrong. Should also expose TLS library linkage
593 PP/35 Pull in <features.h> on Linux, for some portability edge-cases of
594 64-bit ${eval} (JH/03).
596 PP/36 Define _GNU_SOURCE in exim.h; it's needed for some releases of
597 GNU libc to support some of the 64-bit stuff, should not lead to
598 conflicts. Defined before os.h is pulled in, so if a given platform
599 needs to override this, it can.
601 PP/37 Unbreak Cyrus SASL auth: SSF retrieval was incorrect, Exim thought
602 protection layer was required, which is not implemented.
603 Bugzilla 1254, patch from Wolfgang Breyha.
605 PP/38 Overhaul DH prime handling, supply RFC-specified DH primes as built
606 into Exim, default to IKE id 23 from RFC 5114 (2048 bit). Make
607 tls_dhparam take prime identifiers. Also unbreak combination of
608 OpenSSL+DH_params+TLSSNI.
610 PP/39 Disable SSLv2 by default in OpenSSL support.
616 PP/01 Solaris build fix for Oracle's LDAP libraries.
617 Bugzilla 1109, patch from Stephen Usher.
619 TF/01 HP/UX build fix: avoid arithmetic on a void pointer.
621 TK/01 DKIM Verification: Fix relaxed canon for empty headers w/o
624 TF/02 Fix a couple more cases where we did not log the error message
625 when unlink() failed. See also change 4.74-TF/03.
627 TF/03 Make the exiwhat support code safe for signals. Previously Exim might
628 lock up or crash if it happened to be inside a call to libc when it
629 got a SIGUSR1 from exiwhat.
631 The SIGUSR1 handler appends the current process status to the process
632 log which is later printed by exiwhat. It used to use the general
633 purpose logging code to do this, but several functions it calls are
634 not safe for signals.
636 The new output code in the SIGUSR1 handler is specific to the process
637 log, and simple enough that it's easy to inspect for signal safety.
638 Removing some special cases also simplifies the general logging code.
639 Removing the spurious timestamps from the process log simplifies
642 TF/04 Improved ratelimit ACL condition.
644 The /noupdate option has been deprecated in favour of /readonly which
645 has clearer semantics. The /leaky, /strict, and /readonly update modes
646 are mutually exclusive. The update mode is no longer included in the
647 database key; it just determines when the database is updated. (This
648 means that when you upgrde Exim will forget old rate measurements.)
650 Exim now checks that the per_* options are used with an update mode that
651 makes sense for the current ACL. For example, when Exim is processing a
652 message (e.g. acl_smtp_rcpt or acl_smtp_data, etc.) you can specify
653 per_mail/leaky or per_mail/strict; otherwise (e.g. in acl_smtp_helo) you
654 must specify per_mail/readonly. If you omit the update mode it defaults to
655 /leaky where that makes sense (as before) or /readonly where required.
657 The /noupdate option is now undocumented but still supported for
658 backwards compatibility. It is equivalent to /readonly except that in
659 ACLs where /readonly is required you may specify /leaky/noupdate or
660 /strict/noupdate which are treated the same as /readonly.
662 A useful new feature is the /count= option. This is a generalization
663 of the per_byte option, so that you can measure the throughput of other
664 aggregate values. For example, the per_byte option is now equivalent
665 to per_mail/count=${if >{0}{$message_size} {0} {$message_size} }.
667 The per_rcpt option has been generalized using the /count= mechanism
668 (though it's more complicated than the per_byte equivalence). When it is
669 used in acl_smtp_rcpt, the per_rcpt option adds recipients to the
670 measured rate one at a time; if it is used later (e.g. in acl_smtp_data)
671 or in a non-SMTP ACL it adds all the recipients in one go. (The latter
672 /count=$recipients_count behaviour used to work only in non-SMTP ACLs.)
673 Note that using per_rcpt with a non-readonly update mode in more than
674 one ACL will cause the recipients to be double-counted. (The per_mail
675 and per_byte options don't have this problem.)
677 The handling of very low rates has changed slightly. If the computed rate
678 is less than the event's count (usually one) then this event is the first
679 after a long gap. In this case the rate is set to the same as this event's
680 count, so that the first message of a spam run is counted properly.
682 The major new feature is a mechanism for counting the rate of unique
683 events. The new per_addr option counts the number of different
684 recipients that someone has sent messages to in the last time period. It
685 behaves like per_rcpt if all the recipient addresses are different, but
686 duplicate recipient addresses do not increase the measured rate. Like
687 the /count= option this is a general mechanism, so the per_addr option
688 is equivalent to per_rcpt/unique=$local_part@$domain. You can, for
689 example, measure the rate that a client uses different sender addresses
690 with the options per_mail/unique=$sender_address. There are further
691 details in the main documentation.
693 TF/05 Removed obsolete $Cambridge$ CVS revision strings.
695 TF/06 Removed a few PCRE remnants.
697 TF/07 Automatically extract Exim's version number from tags in the git
698 repository when doing development or release builds.
700 PP/02 Raise smtp_cmd_buffer_size to 16kB.
701 Bugzilla 879. Patch from Paul Fisher.
703 PP/03 Implement SSL-on-connect outbound with protocol=smtps on smtp transport.
704 Heavily based on revision 40f9a89a from Simon Arlott's tree.
707 PP/04 Use .dylib instead of .so for dynamic library loading on MacOS.
709 PP/05 Variable $av_failed, true if the AV scanner deferred.
710 Bugzilla 1078. Patch from John Horne.
712 PP/06 Stop make process more reliably on build failure.
713 Bugzilla 1087. Patch from Heiko Schlittermann.
715 PP/07 Make maildir_use_size_file an _expandable_ boolean.
716 Bugzilla 1089. Patch from Heiko Schlittermann.
718 PP/08 Handle ${run} returning more data than OS pipe buffer size.
719 Bugzilla 1131. Patch from Holger Weiß.
721 PP/09 Handle IPv6 addresses with SPF.
722 Bugzilla 860. Patch from Wolfgang Breyha.
724 PP/10 GnuTLS: support TLS 1.2 & 1.1.
726 Use gnutls_certificate_verify_peers2() [patch from Andreas Metzler].
729 PP/11 match_* no longer expand right-hand-side by default.
730 New compile-time build option, EXPAND_LISTMATCH_RHS.
731 New expansion conditions, "inlist", "inlisti".
733 PP/12 fix uninitialised greeting string from PP/03 (smtps client support).
735 PP/13 shell and compiler warnings fixes for RC1-RC4 changes.
737 PP/14 fix log_write() format string regression from TF/03.
738 Bugzilla 1152. Patch from Dmitry Isaikin.
744 PP/01 The new ldap_require_cert option would segfault if used. Fixed.
746 PP/02 Harmonised TLS library version reporting; only show if debugging.
747 Layout now matches that introduced for other libraries in 4.74 PP/03.
749 PP/03 New openssl_options items: no_sslv2 no_sslv3 no_ticket no_tlsv1
751 PP/04 New "dns_use_edns0" global option.
753 PP/05 Don't segfault on misconfiguration of ref:name exim-user as uid.
756 PP/06 Extra paranoia around buffer usage at the STARTTLS transition.
757 nb: Exim is not vulnerable to http://www.kb.cert.org/vuls/id/555316
759 TK/01 Updated PolarSSL code to 0.14.2.
760 Bugzilla 1097. Patch from Andreas Metzler.
762 PP/07 Catch divide-by-zero in ${eval:...}.
765 PP/08 Condition negation of bool{}/bool_lax{} did not negate. Fixed.
768 TK/02 Bugzilla 1106: CVE-2011-1764 - DKIM log line was subject to a
769 format-string attack -- SECURITY: remote arbitrary code execution.
771 TK/03 SECURITY - DKIM signature header parsing was double-expanded, second
772 time unintentionally subject to list matching rules, letting the header
773 cause arbitrary Exim lookups (of items which can occur in lists, *not*
774 arbitrary string expansion). This allowed for information disclosure.
776 PP/09 Fix another SIGFPE (x86) in ${eval:...} expansion, this time related to
777 INT_MIN/-1 -- value coerced to INT_MAX.
783 NM/01 Workround for PCRE version dependency in version reporting
786 TF/01 Update valgrind.h and memcheck.h to copies from valgrind-3.6.0.
787 This fixes portability to compilers other than gcc, notably
788 Solaris CC and HP-UX CC. Fixes Bugzilla 1050.
790 TF/02 Bugzilla 139: Avoid using the += operator in the modular lookup
791 makefiles for portability to HP-UX and POSIX correctness.
793 PP/01 Permit LOOKUP_foo enabling on the make command-line.
794 Also via indented variable definition in the Makefile.
795 (Debugging by Oliver Heesakkers).
797 PP/02 Restore caching of spamd results with expanded spamd_address.
798 Patch from author of expandable spamd_address patch, Wolfgang Breyha.
800 PP/03 Build issue: lookups-Makefile now exports LC_ALL=C
801 Improves build reliability. Fix from: Frank Elsner
803 NM/02 Fix wide character breakage in the rfc2047 coding
804 Fixes bug 1064. Patch from Andrey N. Oktyabrski
806 NM/03 Allow underscore in dnslist lookups
807 Fixes bug 1026. Patch from Graeme Fowler
809 PP/04 Bugzilla 230: Support TLS-enabled LDAP (in addition to ldaps).
810 Code patches from Adam Ciarcinski of NetBSD.
812 NM/04 Fixed exiqgrep to cope with mailq missing size issue
815 PP/05 Bugzilla 1083: when lookup expansion defers, escape the output which
816 is logged, to avoid truncation. Patch from John Horne.
818 PP/06 Bugzilla 1042: implement freeze_signal on pipe transports.
819 Patch from Jakob Hirsch.
821 PP/07 Bugzilla 1061: restrict error messages sent over SMTP to not reveal
822 SQL string expansion failure details.
823 Patch from Andrey Oktyabrski.
825 PP/08 Bugzilla 486: implement %M datestamping in log filenames.
826 Patch from Simon Arlott.
828 PP/09 New lookups functionality failed to compile on old gcc which rejects
829 extern declarations in function scope.
830 Patch from Oliver Fleischmann
832 PP/10 Use sig_atomic_t for flags set from signal handlers.
833 Check getgroups() return and improve debugging.
834 Fixed developed for diagnosis in bug 927 (which turned out to be
837 PP/11 Bugzilla 1055: Update $message_linecount for maildir_tag.
838 Patch from Mark Zealey.
840 PP/12 Bugzilla 1056: Improved spamd server selection.
841 Patch from Mark Zealey.
843 PP/13 Bugzilla 1086: Deal with maildir quota file races.
844 Based on patch from Heiko Schlittermann.
846 PP/14 Bugzilla 1019: DKIM multiple signature generation fix.
847 Patch from Uwe Doering, sign-off by Michael Haardt.
849 NM/05 Fix to spam.c to accommodate older gcc versions which dislike
850 variable declaration deep within a block. Bug and patch from
853 PP/15 lookups-Makefile IRIX compatibilty coercion.
855 PP/16 Make DISABLE_DKIM build knob functional.
857 NM/06 Bugzilla 968: child_open_uid: restore default SIGPIPE handler
858 Patch by Simon Arlott
860 TF/03 Fix valgrind.h portability to C89 compilers that do not support
861 variable argument macros. Our copy now differs from upstream.
867 TF/01 Failure to get a lock on a hints database can have serious
868 consequences so log it to the panic log.
870 TF/02 Log LMTP confirmation messages in the same way as SMTP,
871 controlled using the smtp_confirmation log selector.
873 TF/03 Include the error message when we fail to unlink a spool file.
875 DW/01 Bugzilla 139: Support dynamically loaded lookups as modules.
876 With thanks to Steve Haslam, Johannes Berg & Serge Demonchaux
877 for maintaining out-of-tree patches for some time.
879 PP/01 Bugzilla 139: Documentation and portability issues.
880 Avoid GNU Makefile-isms, let Exim continue to build on BSD.
881 Handle per-OS dynamic-module compilation flags.
883 PP/02 Let /dev/null have normal permissions.
884 The 4.73 fixes were a little too stringent and complained about the
885 permissions on /dev/null. Exempt it from some checks.
886 Reported by Andreas M. Kirchwitz.
888 PP/03 Report version information for many libraries, including
889 Exim version information for dynamically loaded libraries. Created
890 version.h, now support a version extension string for distributors
891 who patch heavily. Dynamic module ABI change.
893 PP/04 CVE-2011-0017 - check return value of setuid/setgid. This is a
894 privilege escalation vulnerability whereby the Exim run-time user
895 can cause root to append content of the attacker's choosing to
898 PP/05 Bugzilla 1041: merged DCC maintainer's fixes for return code.
901 PP/06 Bugzilla 1071: fix delivery logging with untrusted macros.
902 If dropping privileges for untrusted macros, we disabled normal logging
903 on the basis that it would fail; for the Exim run-time user, this is not
904 the case, and it resulted in successful deliveries going unlogged.
905 Fixed. Reported by Andreas Metzler.
911 PP/01 Date: & Message-Id: revert to normally being appended to a message,
912 only prepend for the Resent-* case. Fixes regression introduced in
913 Exim 4.70 by NM/22 for Bugzilla 607.
915 PP/02 Include check_rfc2047_length in configure.default because we're seeing
916 increasing numbers of administrators be bitten by this.
918 JJ/01 Added DISABLE_DKIM and comment to src/EDITME
920 PP/03 Bugzilla 994: added openssl_options main configuration option.
922 PP/04 Bugzilla 995: provide better SSL diagnostics on failed reads.
924 PP/05 Bugzilla 834: provide a permit_coredump option for pipe transports.
926 PP/06 Adjust NTLM authentication to handle SASL Initial Response.
928 PP/07 If TLS negotiated an anonymous cipher, we could end up with SSL but
929 without a peer certificate, leading to a segfault because of an
930 assumption that peers always have certificates. Be a little more
931 paranoid. Problem reported by Martin Tscholak.
933 PP/08 Bugzilla 926: switch ClamAV to use the new zINSTREAM API for content
934 filtering; old API available if built with WITH_OLD_CLAMAV_STREAM=yes
935 NB: ClamAV planning to remove STREAM in "middle of 2010".
936 CL also introduces -bmalware, various -d+acl logging additions and
937 more caution in buffer sizes.
939 PP/09 Implemented reverse_ip expansion operator.
941 PP/10 Bugzilla 937: provide a "debug" ACL control.
943 PP/11 Bugzilla 922: Documentation dusting, patch provided by John Horne.
945 PP/12 Bugzilla 973: Implement --version.
947 PP/13 Bugzilla 752: Refuse to build/run if Exim user is root/0.
949 PP/14 Build without WITH_CONTENT_SCAN. Path from Andreas Metzler.
951 PP/15 Bugzilla 816: support multiple condition rules on Routers.
953 PP/16 Add bool_lax{} expansion operator and use that for combining multiple
954 condition rules, instead of bool{}. Make both bool{} and bool_lax{}
955 ignore trailing whitespace.
957 JJ/02 prevent non-panic DKIM error from being sent to paniclog
959 JJ/03 added tcp_wrappers_daemon_name to allow host entries other than
962 PP/17 Fix malware regression for cmdline scanner introduced in PP/08.
963 Notification from Dr Andrew Aitchison.
965 PP/18 Change ClamAV response parsing to be more robust and to handle ClamAV's
966 ExtendedDetectionInfo response format.
967 Notification from John Horne.
969 PP/19 OpenSSL 1.0.0a compatibility const-ness change, should be backwards
972 PP/20 Added a CONTRIBUTING file. Fixed the documentation build to use http:
973 XSL and documented dependency on system catalogs, with examples of how
976 DW/21 Added Valgrind hooks in store.c to help it capture out-of-bounds store
979 DW/22 Bugzilla 1044: CVE-2010-4345 - partial fix: restrict default behaviour
980 of CONFIGURE_OWNER and CONFIGURE_GROUP options to no longer allow a
981 configuration file which is writeable by the Exim user or group.
983 DW/23 Bugzilla 1044: CVE-2010-4345 - part two: extend checks for writeability
984 of configuration files to cover files specified with the -C option if
985 they are going to be used with root privileges, not just the default
988 DW/24 Bugzilla 1044: CVE-2010-4345 - part three: remove ALT_CONFIG_ROOT_ONLY
989 option (effectively making it always true).
991 DW/25 Add TRUSTED_CONFIG_PREFIX_FILE option to allow alternative configuration
992 files to be used while preserving root privileges.
994 DW/26 Set FD_CLOEXEC on SMTP sockets after forking in the daemon, to ensure
995 that rogue child processes cannot use them.
997 PP/27 Bugzilla 1047: change the default for system_filter_user to be the Exim
998 run-time user, instead of root.
1000 PP/28 Add WHITELIST_D_MACROS option to let some macros be overridden by the
1001 Exim run-time user without dropping privileges.
1003 DW/29 Remove use of va_copy() which breaks pre-C99 systems. Duplicate the
1004 result string, instead of calling string_vformat() twice with the same
1007 DW/30 Allow TRUSTED_CONFIG_PREFIX_FILE only for Exim or CONFIGURE_OWNER, not
1008 for other users. Others should always drop root privileges if they use
1009 -C on the command line, even for a whitelisted configure file.
1011 DW/31 Turn TRUSTED_CONFIG_PREFIX_FILE into TRUSTED_CONFIG_FILE. No prefixes.
1013 NM/01 Fixed bug #1002 - Message loss when using multiple deliveries
1019 JJ/01 installed exipick 20100104.1, adding $max_received_linelength,
1020 $data_path, and $header_path variables; fixed documentation bugs and
1023 JJ/02 installed exipick 20100222.0, added --input-dir and --finput to allow
1024 exipick to access non-standard spools, including the "frozen" queue
1027 NM/01 Bugzilla 965: Support mysql stored procedures.
1028 Patch from Alain Williams
1030 NM/02 Bugzilla 961: Spacing fix (syntax error) on Makefile directives for NetBSD
1032 NM/03 Bugzilla 955: Documentation fix for max_rcpts.
1033 Patch from Andreas Metzler
1035 NM/04 Bugzilla 954: Fix for unknown responses from Dovecot authenticator.
1036 Patch from Kirill Miazine
1038 NM/05 Bugzilla 671: Added umask to procmail example.
1040 JJ/03 installed exipick 20100323.0, fixing doc bug
1042 NM/06 Bugzilla 988: CVE-2010-2023 - prevent hardlink attack on sticky mail
1043 directory. Notification and patch from Dan Rosenberg.
1045 TK/01 PDKIM: Upgrade PolarSSL files to upstream version 0.12.1.
1047 TK/02 Improve log output when DKIM signing operation fails.
1049 MH/01 Treat the transport option dkim_domain as a colon separated
1050 list, not as a single string, and sign the message with each element,
1051 omitting multiple occurences of the same signer.
1053 NM/07 Null terminate DKIM strings, Null initialise DKIM variable
1054 Bugzilla 985, 986. Patch by Simon Arlott
1056 NM/08 Bugzilla 967. dnsdb DNS TXT record bug fix (DKIM-related)
1057 Patch by Simon Arlott
1059 PP/01 Bugzilla 989: CVE-2010-2024 - work round race condition on
1060 MBX locking. Notification from Dan Rosenberg.
1066 TK/01 Bugzilla 912: Fix DKIM segfault on empty headers/body.
1068 NM/01 Bugzilla 913: Documentation fix for gnutls_* options.
1070 NM/02 Bugzilla 722: Documentation for randint. Better randomness defaults.
1072 NM/03 Bugzilla 847: Enable DNSDB lookup by default.
1074 NM/04 Bugzilla 915: Flag broken perl installation during build.
1080 TK/01 Added patch by Johannes Berg that expands the main option
1081 "spamd_address" if it starts with a dollar sign.
1083 TK/02 Write list of recipients to X-Envelope-Sender header when building
1084 the mbox-format spool file for content scanning (suggested by Jakob
1087 TK/03 Added patch by Wolfgang Breyha that adds experimental DCC
1088 (http://www.dcc-servers.net/) support via dccifd. Activated by
1089 setting EXPERIMENTAL_DCC=yes in Local/Makefile.
1091 TK/04 Bugzilla 673: Add f-protd malware scanner support. Patch submitted
1092 by Mark Daniel Reidel <mr@df.eu>.
1094 NM/01 Bugzilla 657: Embedded PCRE removed from the exim source tree.
1095 When building exim an external PCRE library is now needed -
1096 PCRE is a system library on the majority of modern systems.
1097 See entry on PCRE_LIBS in EDITME file.
1099 NM/02 Bugzilla 646: Removed unwanted C/R in Dovecot authenticator
1100 conversation. Added nologin parameter to request.
1101 Patch contributed by Kirill Miazine.
1103 TF/01 Do not log submission mode rewrites if they do not change the address.
1105 TF/02 Bugzilla 662: Fix stack corruption before exec() in daemon.c.
1107 NM/03 Bugzilla 602: exicyclog now handles panic log, and creates empty
1108 log files in place. Contributed by Roberto Lima.
1110 NM/04 Bugzilla 667: Close socket used by dovecot authenticator.
1112 TF/03 Bugzilla 615: When checking the local_parts router precondition
1113 after a local_part_suffix or local_part_prefix option, Exim now
1114 does not use the address's named list lookup cache, since this
1115 contains cached lookups for the whole local part.
1117 NM/05 Bugzilla 521: Integrated SPF Best Guess support contributed by
1118 Robert Millan. Documentation is in experimental-spec.txt.
1120 TF/04 Bugzilla 668: Fix parallel build (make -j).
1122 NM/05.2 Bugzilla 437: Prevent Maildir aux files being created with mode 000.
1124 NM/05.3 Bugzilla 598: Improvement to Dovecot authenticator handling.
1125 Patch provided by Jan Srzednicki.
1127 TF/05 Leading white space used to be stripped from $spam_report which
1128 wrecked the formatting. Now it is preserved.
1130 TF/06 Save $spam_score, $spam_bar, and $spam_report in spool files, so
1131 that they are available at delivery time.
1133 TF/07 Fix the way ${extract is skipped in the untaken branch of a conditional.
1135 TF/08 TLS error reporting now respects the incoming_interface and
1136 incoming_port log selectors.
1138 TF/09 Produce a more useful error message if an SMTP transport's hosts
1139 setting expands to an empty string.
1141 NM/06 Bugzilla 744: EXPN did not work under TLS.
1142 Patch provided by Phil Pennock.
1144 NM/07 Bugzilla 769: Extraneous comma in usage fprintf
1145 Patch provided by Richard Godbee.
1147 NM/08 Fixed erroneous documentation references to smtp_notquit_acl to be
1148 acl_smtp_notquit, added index entry.
1150 NM/09 Bugzilla 787: Potential buffer overflow in string_format.
1151 Patch provided by Eugene Bujak.
1153 NM/10 Bugzilla 770: Problem on some platforms modifying the len parameter to
1154 accept(). Patch provided by Maxim Dounin.
1156 NM/11 Bugzilla 749: Preserve old behaviour of blanks comparing equal to zero.
1157 Patch provided by Phil Pennock.
1159 NM/12 Bugzilla 497: Correct behaviour of exiwhat when no config exists.
1161 NM/13 Bugzilla 590: Correct handling of Resent-Date headers.
1162 Patch provided by Brad "anomie" Jorsch.
1164 NM/14 Bugzilla 622: Added timeout setting to transport filter.
1165 Patch provided by Dean Brooks.
1167 TK/05 Add native DKIM support (does not depend on external libraries).
1169 NM/15 Bugzilla 854: Removed code that symlinks to pcre as its no longer useful.
1170 Patch provided by Graeme Fowler.
1172 NM/16 Bugzilla 851: Documentation example syntax fix.
1174 NM/17 Changed NOTICE file to remove references to embedded PCRE.
1176 NM/18 Bugzilla 894: Fix issue with very long lines including comments in
1179 NM/19 Bugzilla 745: TLS version reporting.
1180 Patch provided by Phil Pennock.
1182 NM/20 Bugzilla 167: bool: condition support.
1183 Patch provided by Phil Pennock.
1185 NM/21 Bugzilla 665: gnutls_compat_mode to allow compatibility with broken
1186 clients. Patch provided by Phil Pennock.
1188 NM/22 Bugzilla 607: prepend (not append) Resent-Message-ID and Resent-Date.
1189 Patch provided by Brad "anomie" Jorsch.
1191 NM/23 Bugzilla 687: Fix misparses in eximstats.
1192 Patch provided by Heiko Schlittermann.
1194 NM/24 Bugzilla 688: Fix exiwhat to handle log_selector = +pid.
1195 Patch provided by Heiko Schlittermann.
1197 NM/25 Bugzilla 727: Use transport mode as default mode for maildirsize file.
1198 plus update to original patch.
1200 NM/26 Bugzilla 799: Documentation correction for ratelimit.
1202 NM/27 Bugzilla 802: Improvements to local interface IP addr detection.
1203 Patch provided by David Brownlee.
1205 NM/28 Bugzilla 807: Improvements to LMTP delivery logging.
1207 NM/29 Bugzilla 862, 866, 875: Documentation bugfixes.
1209 NM/30 Bugzilla 888: TLS documentation bugfixes.
1211 NM/31 Bugzilla 896: Dovecot buffer overrun fix.
1213 NM/32 Bugzilla 889: Change all instances of "expr" in shell scripts to "expr --"
1214 Unlike the original bugzilla I have changed all shell scripts in src tree.
1216 NM/33 Bugzilla 898: Transport filter timeout fix.
1217 Patch by Todd Rinaldo.
1219 NM/34 Bugzilla 901: Fix sign/unsigned and UTF mismatches.
1220 Patch by Serge Demonchaux.
1222 NM/35 Bugzilla 39: Base64 decode bug fixes.
1223 Patch by Jakob Hirsch.
1225 NM/36 Bugzilla 909: Correct connect() call in dcc code.
1227 NM/37 Bugzilla 910: Correct issue with relaxed/simple handling.
1229 NM/38 Bugzilla 908: Removed NetBSD3 support as no longer needed.
1231 NM/39 Bugzilla 911: Fixed MakeLinks build script.
1237 TK/01 Add preliminary DKIM support. Currently requires a forked version of
1238 ALT-N's libdkim that I have put here:
1239 http://duncanthrax.net/exim-experimental/
1241 Note to Michael Haardt: I had to rename some vars in sieve.c. They
1242 were called 'true' and it seems that C99 defines that as a reserved
1243 keyword to be used with 'bool' variable types. That means you could
1244 not include C99-style headers which use bools without triggering
1245 build errors in sieve.c.
1247 NM/01 Bugzilla 592: --help option is handled incorrectly if exim is invoked
1248 as mailq or other aliases. Changed the --help handling significantly
1249 to do whats expected. exim_usage() emits usage/help information.
1251 SC/01 Added the -bylocaldomain option to eximstats.
1253 NM/02 Bugzilla 619: Defended against bad data coming back from gethostbyaddr.
1255 NM/03 Bugzilla 613: Documentation fix for acl_not_smtp.
1257 NM/04 Bugzilla 628: PCRE update to 7.4 (work done by John Hall).
1263 PH/01 Another patch from the Sieve maintainer.
1265 PH/02 When an IPv6 address is converted to a string for single-key lookup
1266 in an address list (e.g. for an item such as "net24-dbm;/net/works"),
1267 dots are used instead of colons so that keys in lsearch files need not
1268 contain colons. This was done some time before quoting was made available
1269 in lsearch files. However, iplsearch files do require colons in IPv6 keys
1270 (notated using the quote facility) so as to distinguish them from IPv4
1271 keys. This meant that lookups for IP addresses in host lists did not work
1272 for iplsearch lookups.
1274 This has been fixed by arranging for IPv6 addresses to be expressed with
1275 colons if the lookup type is iplsearch. This is not incompatible, because
1276 previously such lookups could never work.
1278 The situation is now rather anomolous, since one *can* have colons in
1279 ordinary lsearch keys. However, making the change in all cases is
1280 incompatible and would probably break a number of configurations.
1282 TK/01 Change PRVS address formatting scheme to reflect latests BATV draft
1285 MH/01 The "spam" ACL condition code contained a sscanf() call with a %s
1286 conversion specification without a maximum field width, thereby enabling
1287 a rogue spamd server to cause a buffer overflow. While nobody in their
1288 right mind would setup Exim to query an untrusted spamd server, an
1289 attacker that gains access to a server running spamd could potentially
1290 exploit this vulnerability to run arbitrary code as the Exim user.
1292 TK/02 Bugzilla 502: Apply patch to make the SPF-Received: header use
1293 $primary_hostname instead of what libspf2 thinks the hosts name is.
1295 MH/02 The dsearch lookup now uses lstat(2) instead of stat(2) to look for
1296 a directory entry by the name of the lookup key. Previously, if a
1297 symlink pointed to a non-existing file or a file in a directory that
1298 Exim lacked permissions to read, a lookup for a key matching that
1299 symlink would fail. Now it is enough that a matching directory entry
1300 exists, symlink or not. (Bugzilla 503.)
1302 PH/03 The body_linecount and body_zerocount variables are now exported in the
1305 PH/04 Added the $dnslist_matched variable.
1307 PH/05 Unset $tls_cipher and $tls_peerdn before making a connection as a client.
1308 This means they are set thereafter only if the connection becomes
1311 PH/06 Added the client_condition to authenticators so that some can be skipped
1312 by clients under certain conditions.
1314 PH/07 The error message for a badly-placed control=no_multiline_responses left
1315 "_responses" off the end of the name.
1317 PH/08 Added -Mvc to output a copy of a message in RFC 2822 format.
1319 PH/09 Tidied the code for creating ratelimiting keys, creating them explicitly
1320 (without spaces) instead of just copying the configuration text.
1322 PH/10 Added the /noupdate option to the ratelimit ACL condition.
1324 PH/11 Added $max_received_linelength.
1326 PH/12 Added +ignore_defer and +include_defer to host lists.
1328 PH/13 Installed PCRE version 7.2. This needed some changes because of the new
1329 way in which PCRE > 7.0 is built.
1331 PH/14 Implemented queue_only_load_latch.
1333 PH/15 Removed an incorrect (int) cast when reading the value of SIZE in a
1334 MAIL command. The effect was to mangle the value on 64-bit systems.
1336 PH/16 Another patch from the Sieve maintainer.
1338 PH/17 Added the NOTQUIT ACL, based on a patch from Ted Cooper.
1340 PH/18 If a system quota error occurred while trying to create the file for
1341 a maildir delivery, the message "Mailbox is full" was not appended to the
1342 bounce if the delivery eventually timed out. Change 4.67/27 below applied
1343 only to a quota excession during the actual writing of the file.
1345 PH/19 It seems that peer DN values may contain newlines (and other non-printing
1346 characters?) which causes problems in log lines. The DN values are now
1347 passed through string_printing() before being added to log lines.
1349 PH/20 Added the "servers=" facility to MySQL and PostgreSQL lookups. (Oracle
1350 and InterBase are left for another time.)
1352 PH/21 Added message_body_newlines option.
1354 PH/22 Guard against possible overflow in moan_check_errorcopy().
1356 PH/23 POSIX allows open() to be a macro; guard against that.
1358 PH/24 If the recipient of an error message contained an @ in the local part
1359 (suitably quoted, of course), incorrect values were put in $domain and
1360 $local_part during the evaluation of errors_copy.
1366 MH/01 Fix for bug #448, segfault in Dovecot authenticator when interface_address
1367 is unset (happens when testing with -bh and -oMi isn't used). Thanks to
1370 PH/01 Added a new log selector smtp_no_mail, to log SMTP sessions that do not
1371 issue a MAIL command.
1373 PH/02 In an ACL statement such as
1375 deny dnslists = X!=127.0.0.2 : X=127.0.0.2
1377 if a client was not listed at all, or was listed with a value other than
1378 127.0.0.2, in the X list, but was listed with 127.0.0.2 in the Y list,
1379 the condition was not true (as it should be), so access was not denied.
1380 The bug was that the ! inversion was incorrectly passed on to the second
1381 item. This has been fixed.
1383 PH/03 Added additional dnslists conditions == and =& which are different from
1384 = and & when the dns lookup returns more than one IP address.
1386 PH/04 Added gnutls_require_{kx,mac,protocols} to give more control over the
1387 cipher suites used by GnuTLS. These options are ignored by OpenSSL.
1389 PH/05 After discussion on the list, added a compile time option ENABLE_DISABLE_
1390 FSYNC, which compiles an option called disable_fsync that allows for
1391 bypassing fsync(). The documentation is heavily laced with warnings.
1393 SC/01 Updated eximstats to collate all SpamAssassin rejects into one bucket.
1395 PH/06 Some tidies to the infrastructure of the Test Suite that is concerned
1396 with the auxiliary C programs that it uses: (1) Arrange for BIND_8_COMPAT
1397 to be defined when compiling on OSX (Darwin); (2) Tidies to the Makefile,
1398 including adding "make clean"; (3) Added -fPIC when compiling the test
1399 dynamically loaded module, to get rid of a warning.
1401 MH/02 Fix for bug #451, causing paniclog entries to be written if a bounce
1402 message fails, move_frozen_messages = true and ignore_bounce_errors_after
1403 = 0s. The bug is otherwise harmless.
1405 PH/07 There was a bug in the dovecot authenticator such that the value of
1406 $auth1 could be overwritten, and so not correctly preserved, after a
1407 successful authentication. This usually meant that the value preserved by
1408 the server_setid option was incorrect.
1410 PH/08 Added $smtp_count_at_connection_start, deliberately with a long name.
1412 PH/09 Installed PCRE release 7.0.
1414 PH/10 The acl_not_smtp_start ACL was, contrary to the documentation, not being
1415 run for batched SMTP input. It is now run at the start of every message
1416 in the batch. While fixing this I discovered that the process information
1417 (output by running exiwhat) was not always getting set for -bs and -bS
1418 input. This is fixed, and it now also says "batched" for BSMTP.
1420 PH/11 Added control=no_pipelining.
1422 PH/12 Added $sending_ip_address and $sending_port (mostly Magnus Holmgren's
1423 patch, slightly modified), and move the expansion of helo_data till after
1424 the connection is made in the smtp transport (so it can use these
1427 PH/13 Added ${rfc2047d: to decoded RFC 2047 strings.
1429 PH/14 Added log_selector = +pid.
1431 PH/15 Flush SMTP output before delaying, unless control=no_delay_flush is set.
1433 PH/16 Add ${if forany and ${if forall.
1435 PH/17 Added dsn_from option to vary the From: line in DSNs.
1437 PH/18 Flush SMTP output before performing a callout, unless control =
1438 no_callout_flush is set.
1440 PH/19 Change 4.64/PH/36 introduced a bug: when address_retry_include_sender
1441 was true (the default) a successful delivery failed to delete the retry
1442 item, thus causing premature timeout of the address. The bug is now
1445 PH/20 Added hosts_avoid_pipelining to the smtp transport.
1447 PH/21 Long custom messages for fakedefer and fakereject are now split up
1448 into multiline reponses in the same way that messages for "deny" and
1449 other ACL rejections are.
1451 PH/22 Applied Jori Hamalainen's speed-up changes and typo fixes to exigrep,
1452 with slight modification.
1454 PH/23 Applied sieve patches from the maintainer "tracking the latest notify
1455 draft, changing the syntax and factoring some duplicate code".
1457 PH/24 When the log selector "outgoing_port" was set, the port was shown as -1
1458 for deliveries of the second and subsequent messages over the same SMTP
1461 PH/25 Applied Magnus Holmgren's patch for ${addresses, ${map, ${filter, and
1462 ${reduce, with only minor "tidies".
1464 SC/02 Applied Daniel Tiefnig's patch to improve the '($parent) =' pattern match.
1466 PH/26 Added a "continue" ACL modifier that does nothing, for the benefit of its
1467 expansion side effects.
1469 PH/27 When a message times out after an over-quota error from an Exim-imposed
1470 quota, the bounce message says "mailbox is full". This message was not
1471 being given when it was a system quota that was exceeded. It now should
1474 MH/03 Made $recipients available in local_scan(). local_scan() already has
1475 better access to the recipient list through recipients_list[], but
1476 $recipients can be useful in postmaster-provided expansion strings.
1478 PH/28 The $smtp_command and $smtp_command_argument variables were not correct
1479 in the case of a MAIL command with additional options following the
1480 address, for example: MAIL FROM:<foo@bar> SIZE=1234. The option settings
1481 were accidentally chopped off.
1483 PH/29 SMTP synchronization checks are implemented when a command is read -
1484 there is a check that no more input is waiting when there shouldn't be
1485 any. However, for some commands, a delay in an ACL can mean that it is
1486 some time before the response is written. In this time, more input might
1487 arrive, invalidly. So now there are extra checks after an ACL has run for
1488 HELO/EHLO and after the predata ACL, and likewise for MAIL and RCPT when
1489 pipelining has not been advertised.
1491 PH/30 MH's patch to allow iscntrl() characters to be list separators.
1493 PH/31 Unlike :fail:, a custom message specified with :defer: was not being
1494 returned in the SMTP response when smtp_return_error_details was false.
1495 This has been fixed.
1497 PH/32 Change the Dovecot authenticator to use read() and write() on the socket
1498 instead of the C I/O that was originally supplied, because problems were
1499 reported on Solaris.
1501 PH/33 Compile failed with OpenSSL 0.9.8e. This was due to a coding error in
1502 Exim which did not show up earlier: it was assuming that a call to
1503 SSL_CTX_set_info_callback() might give an error value. In fact, there is
1504 no error. In previous releases of OpenSSL, SSL_CTX_set_info_callback()
1505 was a macro that became an assignment, so it seemed to work. This has
1506 changed to a proper function call with a void return, hence the compile
1507 error. Exim's code has been fixed.
1509 PH/34 Change HDA_SIZE in oracle.c from 256 to 512. This is needed for 64-bit
1512 PH/35 Applied a patch from the Sieve maintainer which fixes a bug in "notify".
1514 PH/36 Applied John Jetmore's patch to add -v functionality to exigrep.
1516 PH/37 If a message is not accepted after it has had an id assigned (e.g.
1517 because it turns out to be too big or there is a timeout) there is no
1518 "Completed" line in the log. When some messages of this type were
1519 selected by exigrep, they were listed as "not completed". Others were
1520 picked up by some special patterns. I have improved the selection
1521 criteria to be more general.
1523 PH/38 The host_find_failed option in the manualroute router can now be set
1524 to "ignore", to completely ignore a host whose IP address cannot be
1525 found. If all hosts are ignored, the behaviour is controlled by the new
1526 host_all_ignored option.
1528 PH/39 In a list of hosts for manualroute, if one item (either because of multi-
1529 homing or because of multiple MX records with /mx) generated more than
1530 one IP address, and the following item turned out to be the local host,
1531 all the secondary addresses of the first item were incorrectly removed
1532 from the list, along with the local host and any following hosts (which
1533 is what is supposed to happen).
1535 PH/40 When Exim receives a message, it writes the login name, uid, and gid of
1536 whoever called Exim into the -H file. In the case of the daemon it was
1537 behaving confusingly. When first started, it used values for whoever
1538 started the daemon, but after a SIGHUP it used the Exim user (because it
1539 calls itself on a restart). I have changed the code so that it now always
1542 PH/41 (Following a suggestion from Tony Finch) If all the RCPT commands in a
1543 message are rejected with the same error (e.g. no authentication or bad
1544 sender address), and a DATA command is nevertheless sent (as can happen
1545 with PIPELINING or a stupid MUA), the error message that was given to the
1546 RCPT commands is included in the rejection of the DATA command. This is
1547 intended to be helpful for MUAs that show only the final error to their
1550 PH/42 Another patch from the Sieve maintainer.
1552 SC/02 Eximstats - Differentiate between permanent and temporary rejects.
1553 Eximstats - Fixed some broken HTML links and added missing column headers
1555 Eximstats - Fixed Grand Total Summary Domains, Edomains, and Email
1556 columns for Rejects, Temp Rejects, Ham, and Spam rows.
1558 SC/03 Eximstats - V1.58 Fix to get <> and blackhole to show in edomain tables.
1560 PH/43 Yet another patch from the Sieve maintainer.
1562 PH/44 I found a way to check for a TCP/IP connection going away before sending
1563 the response to the final '.' that terminates a message, but only in the
1564 case where the client has not sent further data following the '.'
1565 (unfortunately, this is allowed). However, in many cases there won't be
1566 any further data because there won't be any more messages to send. A call
1567 to select() can be used: if it shows that the input is "ready", there is
1568 either input waiting, or the socket has been closed. An attempt to read
1569 the next input character can distinguish the two cases. Previously, Exim
1570 would have sent an OK response which the client would never have see.
1571 This could lead to message repetition. This fix should cure that, at
1572 least in a lot of common cases.
1574 PH/45 Do not advertise STARTTLS in response to HELP unless it would be
1575 advertised in response to EHLO.
1581 PH/01 Two more bugs that were introduced by 4.64/PH/07, in addition to the one
1582 fixed by 4.65/MH/01 (is this a record?) are fixed:
1584 (i) An empty string was always treated as zero by the numeric comparison
1585 operators. This behaviour has been restored.
1587 (ii) It is documented that the numeric comparison operators always treat
1588 their arguments as decimal numbers. This was broken in that numbers
1589 starting with 0 were being interpreted as octal.
1591 While fixing these problems I realized that there was another issue that
1592 hadn't been noticed. Values of message_size_limit (both the global option
1593 and the transport option) were treated as octal if they started with 0.
1594 The documentation was vague. These values are now always treated as
1595 decimal, and I will make that clear in the documentation.
1601 TK/01 Disable default definition of HAVE_LINUX_SENDFILE. Clashes with
1602 Linux large file support (_FILE_OFFSET_BITS=64) on older glibc
1605 MH/01 Don't check that the operands of numeric comparison operators are
1606 integers when their expansion is in "skipping" mode (fixes bug
1607 introduced by 4.64-PH/07).
1609 PH/01 If a system filter or a router generates more than SHRT_MAX (32767)
1610 child addresses, Exim now panics and dies. Previously, because the count
1611 is held in a short int, deliveries were likely to be lost. As such a
1612 large number of recipients for a single message is ridiculous
1613 (performance will be very, very poor), I have chosen to impose a limit
1614 rather than extend the field.
1620 TK/01 Bugzilla #401. Fix DK spooling code so that it can overwrite a
1621 leftover -K file (the existence of which was triggered by #402).
1622 While we were at it, introduced process PID as part of the -K
1623 filename. This should rule out race conditions when creating
1626 TK/02 Bugzilla #402. Apply patch from Simon Arlott, speeding up DK signing
1627 processing considerably. Previous code took too long for large mails,
1628 triggering a timeout which in turn triggers #401.
1630 TK/03 Introduced HAVE_LINUX_SENDFILE to os.h-Linux. Currently only used
1631 in the DK code in transports.c. sendfile() is not really portable,
1632 hence the _LINUX specificness.
1634 TF/01 In the add_headers option to the mail command in an Exim filter,
1635 there was a bug that Exim would claim a syntax error in any
1636 header after the first one which had an odd number of characters
1639 PH/01 If a server that rejects MAIL FROM:<> was the target of a sender
1640 callout verification, Exim cached a "reject" for the entire domain. This
1641 is correct for most verifications, but it is not correct for a recipient
1642 verification with use_sender or use_postmaster set, because in that case
1643 the callout does not use MAIL FROM:<>. Exim now distinguishes the special
1644 case of MAIL FROM:<> rejection from other early rejections (e.g.
1645 rejection of HELO). When verifying a recipient using a non-null MAIL
1646 address, the cache is ignored if it shows MAIL FROM:<> rejection.
1647 Whatever the result of the callout, the value of the domain cache is
1648 left unchanged (for any other kind of callout, getting as far as trying
1649 RCPT means that the domain itself is ok).
1651 PH/02 Tidied a number of unused variable and signed/unsigned warnings that
1654 PH/03 On Solaris, an unexpectedly close socket (dropped connection) can
1655 manifest itself as EPIPE rather than ECONNECT. When tidying away a
1656 session, the daemon ignores ECONNECT errors and logs others; it now
1657 ignores EPIPE as well.
1659 PH/04 Applied Nico Erfurth's refactoring patch to tidy up mime.c
1660 (quoted-printable decoding).
1662 PH/05 Applied Nico Erfurth's refactoring patch to tidy up spool_mbox.c, and
1663 later the small subsequent patch to fix an introduced bug.
1665 PH/06 Installed the latest Cygwin Makefile from the Cygwin maintainer.
1667 PH/07 There was no check for overflow in expansions such as ${if >{1}{4096M}}.
1669 PH/08 An error is now given if message_size_limit is specified negative.
1671 PH/09 Applied and tidied up Jakob Hirsch's patch for allowing ACL variables
1672 to be given (somewhat) arbitrary names.
1674 JJ/01 exipick 20060919.0, allow for arbitrary acl_ variables introduced
1677 JJ/02 exipick 20060919.0, --show-vars args can now be regular expressions,
1678 miscellaneous code fixes
1680 PH/10 Added the log_reject_target ACL modifier to specify where to log
1683 PH/11 Callouts were setting the name used for EHLO/HELO from $smtp_active_
1684 hostname. This is wrong, because it relates to the incoming message (and
1685 probably the interface on which it is arriving) and not to the outgoing
1686 callout (which could be using a different interface). This has been
1687 changed to use the value of the helo_data option from the smtp transport
1688 instead - this is what is used when a message is actually being sent. If
1689 there is no remote transport (possible with a router that sets up host
1690 addresses), $smtp_active_hostname is used.
1692 PH/12 Installed Andrey Panin's patch to add a dovecot authenticator. Various
1693 tweaks were necessary in order to get it to work (see also 21 below):
1694 (a) The code assumed that strncpy() returns a negative number on buffer
1695 overflow, which isn't the case. Replaced with Exim's string_format()
1697 (b) There were several signed/unsigned issues. I just did the minimum
1698 hacking in of casts. There is scope for a larger refactoring.
1699 (c) The code used strcasecmp() which is not a standard C function.
1700 Replaced with Exim's strcmpic() function.
1701 (d) The code set only $1; it now sets $auth1 as well.
1702 (e) A simple test gave the error "authentication client didn't specify
1703 service in request". It would seem that Dovecot has changed its
1704 interface. Fortunately there's a specification; I followed it and
1705 changed what the client sends and it appears to be working now.
1707 PH/13 Added $message_headers_raw to provide the headers without RFC 2047
1710 PH/14 Corrected misleading output from -bv when -v was also used. Suppose the
1711 address A is aliased to B and C, where B exists and C does not. Without
1712 -v the output is "A verified" because verification stops after a
1713 successful redirection if more than one address is generated. However,
1714 with -v the child addresses are also verified. Exim was outputting "A
1715 failed to verify" and then showing the successful verification for C,
1716 with its parentage. It now outputs "B failed to verify", showing B's
1717 parentage before showing the successful verification of C.
1719 PH/15 Applied Michael Deutschmann's patch to allow DNS black list processing to
1720 look up a TXT record in a specific list after matching in a combined
1723 PH/16 It seems that the options setting for the resolver (RES_DEFNAMES and
1724 RES_DNSRCH) can affect the behaviour of gethostbyname() and friends when
1725 they consult the DNS. I had assumed they would set it the way they
1726 wanted; and indeed my experiments on Linux seem to show that in some
1727 cases they do (I could influence IPv6 lookups but not IPv4 lookups).
1728 To be on the safe side, however, I have now made the interface to
1729 host_find_byname() similar to host_find_bydns(), with an argument
1730 containing the DNS resolver options. The host_find_byname() function now
1731 sets these options at its start, just as host_find_bydns() does. The smtp
1732 transport options dns_qualify_single and dns_search_parents are passed to
1733 host_find_byname() when gethostbyname=TRUE in this transport. Other uses
1734 of host_find_byname() use the default settings of RES_DEFNAMES
1735 (qualify_single) but not RES_DNSRCH (search_parents).
1737 PH/17 Applied (a modified version of) Nico Erfurth's patch to make
1738 spool_read_header() do less string testing, by means of a preliminary
1739 switch on the second character of optional "-foo" lines. (This is
1740 overdue, caused by the large number of possibilities that now exist.
1741 Originally there were few.) While I was there, I also converted the
1742 str(n)cmp tests so they don't re-test the leading "-" and the first
1743 character, in the hope this might squeeze out yet more improvement.
1745 PH/18 Two problems with "group" syntax in header lines when verifying: (1) The
1746 flag allowing group syntax was set by the header_syntax check but not
1747 turned off, possible causing trouble later; (2) The flag was not being
1748 set at all for the header_verify test, causing "group"-style headers to
1749 be rejected. I have now set it in this case, and also caused header_
1750 verify to ignore an empty address taken from a group. While doing this, I
1751 came across some other cases where the code for allowing group syntax
1752 while scanning a header line wasn't quite right (mostly, not resetting
1753 the flag correctly in the right place). These bugs could have caused
1754 trouble for malformed header lines. I hope it is now all correct.
1756 PH/19 The functions {pwcheck,saslauthd}_verify_password() are always called
1757 with the "reply" argument non-NULL. The code, however (which originally
1758 came from elsewhere) had *some* tests for NULL when it wrote to *reply,
1759 but it didn't always do it. This confused somebody who was copying the
1760 code for some other use. I have removed all the tests.
1762 PH/20 It was discovered that the GnuTLS code had support for RSA_EXPORT, a
1763 feature that was used to support insecure browsers during the U.S. crypto
1764 embargo. It requires special client support, and Exim is probably the
1765 only MTA that supported it -- and would never use it because real RSA is
1766 always available. This code has been removed, because it had the bad
1767 effect of slowing Exim down by computing (never used) parameters for the
1768 RSA_EXPORT functionality.
1770 PH/21 On the advice of Timo Sirainen, added a check to the dovecot
1771 authenticator to fail if there's a tab character in the incoming data
1772 (there should never be unless someone is messing about, as it's supposed
1773 to be base64-encoded). Also added, on Timo's advice, the "secured" option
1774 if the connection is using TLS or if the remote IP is the same as the
1775 local IP, and the "valid-client-cert option" if a client certificate has
1778 PH/22 As suggested by Dennis Davis, added a server_condition option to *all*
1779 authenticators. This can be used for authorization after authentication
1780 succeeds. (In the case of plaintext, it servers for both authentication
1783 PH/23 Testing for tls_required and lost_connection in a retry rule didn't work
1784 if any retry times were supplied.
1786 PH/24 Exim crashed if verify=helo was activated during an incoming -bs
1787 connection, where there is no client IP address to check. In this
1788 situation, the verify now always succeeds.
1790 PH/25 Applied John Jetmore's -Mset patch.
1792 PH/26 Added -bem to be like -Mset, but loading a message from a file.
1794 PH/27 In a string expansion for a processed (not raw) header when multiple
1795 headers of the same name were present, leading whitespace was being
1796 removed from all of them, but trailing whitespace was being removed only
1797 from the last one. Now trailing whitespace is removed from each header
1798 before concatenation. Completely empty headers in a concatenation (as
1799 before) are ignored.
1801 PH/28 Fixed bug in backwards-compatibility feature of PH/09 (thanks to John
1802 Jetmore). It would have mis-read ACL variables from pre-4.61 spool files.
1804 PH/29 [Removed. This was a change that I later backed out, and forgot to
1805 correct the ChangeLog entry (that I had efficiently created) before
1806 committing the later change.]
1808 PH/30 Exim was sometimes attempting to deliver messages that had suffered
1809 address errors (4xx response to RCPT) over the same connection as other
1810 messages routed to the same hosts. Such deliveries are always "forced",
1811 so retry times are not inspected. This resulted in far too many retries
1812 for the affected addresses. The effect occurred only when there were more
1813 hosts than the hosts_max_try setting in the smtp transport when it had
1814 the 4xx errors. Those hosts that it had tried were not added to the list
1815 of hosts for which the message was waiting, so if all were tried, there
1816 was no problem. Two fixes have been applied:
1818 (i) If there are any address or message errors in an SMTP delivery, none
1819 of the hosts (tried or untried) are now added to the list of hosts
1820 for which the message is waiting, so the message should not be a
1821 candidate for sending over the same connection that was used for a
1822 successful delivery of some other message. This seems entirely
1823 reasonable: after all the message is NOT "waiting for some host".
1824 This is so "obvious" that I'm not sure why it wasn't done
1825 previously. Hope I haven't missed anything, but it can't do any
1826 harm, as the worst effect is to miss an optimization.
1828 (ii) If, despite (i), such a delivery is accidentally attempted, the
1829 routing retry time is respected, so at least it doesn't keep
1830 hammering the server.
1832 PH/31 Installed Andrew Findlay's patch to close the writing end of the socket
1833 in ${readsocket because some servers need this prod.
1835 PH/32 Added some extra debug output when updating a wait-xxx database.
1837 PH/33 The hint "could be header name not terminated by colon", which has been
1838 given for certain expansion errors for a long time, was not being given
1839 for the ${if def:h_colon_omitted{... case.
1841 PH/34 The spec says: "With one important exception, whenever a domain list is
1842 being scanned, $domain contains the subject domain." There was at least
1843 one case where this was not true.
1845 PH/35 The error "getsockname() failed: connection reset by peer" was being
1846 written to the panic log as well as the main log, but it isn't really
1847 panic-worthy as it just means the connection died rather early on. I have
1848 removed the panic log writing for the ECONNRESET error when getsockname()
1851 PH/36 After a 4xx response to a RCPT error, that address was delayed (in queue
1852 runs only) independently of the message's sender address. This meant
1853 that, if the 4xx error was in fact related to the sender, a different
1854 message to the same recipient with a different sender could confuse
1855 things. In particualar, this can happen when sending to a greylisting
1856 server, but other circumstances could also provoke similar problems.
1857 I have changed the default so that the retry time for these errors is now
1858 based a combination of the sender and recipient addresses. This change
1859 can be overridden by setting address_retry_include_sender=false in the
1862 PH/37 For LMTP over TCP/IP (the smtp transport), error responses from the
1863 remote server are returned as part of bounce messages. This was not
1864 happening for LMTP over a pipe (the lmtp transport), but now it is the
1865 same for both kinds of LMTP.
1867 PH/38 Despite being documented as not happening, Exim was rewriting addresses
1868 in header lines that were in fact CNAMEs. This is no longer the case.
1870 PH/39 If -R or -S was given with -q<time>, the effect of -R or -S was ignored,
1871 and queue runs started by the daemon processed all messages. This has
1872 been fixed so that -R and -S can now usefully be given with -q<time>.
1874 PH/40 Import PCRE release 6.7 (fixes some bugs).
1876 PH/41 Add bitwise logical operations to eval (courtesy Brad Jorsch).
1878 PH/42 Give an error if -q is specified more than once.
1880 PH/43 Renamed the variables $interface_address and $interface_port as
1881 $received_ip_address and $received_port, to make it clear that these
1882 values apply to message reception, and not to the outgoing interface when
1883 a message is delivered. (The old names remain recognized, of course.)
1885 PH/44 There was no timeout on the connect() call when using a Unix domain
1886 socket in the ${readsocket expansion. There now is.
1888 PH/45 Applied a modified version of Brad Jorsch's patch to allow "message" to
1889 be meaningful with "accept".
1891 SC/01 Eximstats V1.43
1892 Bug fix for V1.42 with -h0 specified. Spotted by Chris Lear.
1894 SC/02 Eximstats V1.44
1895 Use a glob alias rather than an array ref in the generated
1896 parser. This improves both readability and performance.
1898 SC/03 Eximstats V1.45 (Marco Gaiarin / Steve Campbell)
1899 Collect SpamAssassin and rejection statistics.
1900 Don't display local sender or destination tables unless
1901 there is data to show.
1902 Added average volumes into the top table text output.
1904 SC/04 Eximstats V1.46
1905 Collect data on the number of addresses (recipients)
1906 as well as the number of messages.
1908 SC/05 Eximstats V1.47
1909 Added 'Message too big' to the list of mail rejection
1910 reasons (thanks to Marco Gaiarin).
1912 SC/06 Eximstats V1.48
1913 Mainlog lines which have GMT offsets and are too short to
1914 have a flag are now skipped.
1916 SC/07 Eximstats V1.49 (Alain Williams)
1917 Added the -emptyok flag.
1919 SC/08 Eximstats V1.50
1920 Fixes for obtaining the IP address from reject messages.
1922 JJ/03 exipick.20061117.2, made header handling as similar to exim as possible
1923 (added [br]h_ prefixes, implemented RFC2047 decoding. Fixed
1924 whitesspace changes from 4.64-PH/27
1926 JJ/04 exipick.20061117.2, fixed format and added $message_headers_raw to
1929 JJ/05 exipick.20061117.2, bug fixes (error out sooner when invalid criteria
1930 are found, allow negative numbers in numeric criteria)
1932 JJ/06 exipick.20061117.2, added new $message_body_missing variable
1934 JJ/07 exipick.20061117.2, added $received_ip_address and $received_port
1935 to match changes made in 4.64-PH/43
1937 PH/46 Applied Jori Hamalainen's patch to add features to exiqsumm.
1939 PH/47 Put in an explicit test for a DNS lookup of an address record where the
1940 "domain" is actually an IP address, and force a failure. This locks out
1941 those revolvers/nameservers that support "A-for-A" lookups, in
1942 contravention of the specifications.
1944 PH/48 When a host name was looked up from an IP address, and the subsequent
1945 forward lookup of the name timed out, the host name was left in
1946 $sender_host_name, contrary to the specification.
1948 PH/49 Although default lookup types such as lsearch* or cdb*@ have always been
1949 restricted to single-key lookups, Exim was not diagnosing an error if
1950 * or *@ was used with a query-style lookup.
1952 PH/50 Increased the value of DH_BITS in tls-gnu.c from 768 to 1024.
1954 MH/01 local_scan ABI version incremented to 1.1. It should have been updated
1955 long ago, but noone interested enough thought of it. Let's just say that
1956 the "1.1" means that there are some new functions that weren't there at
1957 some point in the past.
1959 PH/51 Error processing for expansion failure of helo_data from an smtp
1960 transport during callout processing was broken.
1962 PH/52 Applied John Jetmore's patch to allow tls-on-connect and STARTTLS to be
1963 tested/used via the -bh/-bhc/-bs options.
1965 PH/53 Added missing "#include <time.h>" to pcre/pcretest.c (this was a PCRE
1966 bug, fixed in subsequent PCRE releases).
1968 PH/54 Applied Robert Bannocks' patch to avoid a problem with references that
1969 arises when using the Solaris LDAP libraries (but not with OpenLDAP).
1971 PH/55 Check for a ridiculously long file name in exim_dbmbuild.
1977 SC/01 Use a glob alias rather than an array ref in eximstats generated
1978 parser. This improves both readability and performance.
1980 SC/02 Collect SpamAssassin and rejection statistics in eximstats.
1981 Don't display local sender or destination tables in eximstats unless
1982 there is data to show.
1983 Added average volumes into the eximstats top table text output.
1985 SC/03 Collect data on the number of addresses (recipients) as well
1986 as the number of messages in eximstats.
1988 TF/01 Correct an error in the documentation for the redirect router. Exim
1989 does (usually) call initgroups() when daemonizing.
1991 TF/02 Call initgroups() when dropping privilege in exim.c, so that Exim runs
1992 with consistent privilege compared to when running as a daemon.
1994 TF/03 Note in the spec that $authenticated_id is not set for local
1995 submissions from trusted users.
1997 TF/04 The ratelimit per_rcpt option now works correctly in acl_not_smtp.
1998 Thanks to Dean Brooks <dean@iglou.com> for the patch.
2000 TF/05 Make it easier to get SMTP authentication and TLS/SSL support working
2001 by adding some example configuration directives to the default
2002 configuration file. A little bit of work is required to uncomment the
2003 directives and define how usernames and passwords are checked, but
2004 there is now a framework to start from.
2006 PH/01 Added #define LDAP_DEPRECATED 1 to ldap.c because some of the "old"
2007 functions that Exim currently uses aren't defined in ldap.h for OpenLDAP
2008 without this. I don't know how relevant this is to other LDAP libraries.
2010 PH/02 Add the verb name to the "unknown ACL verb" error.
2012 PH/03 Magnus Holmgren's patch for filter_prepend_home.
2014 PH/03 Fixed Bugzilla #101: macro definition between ACLs doesn't work.
2016 PH/04 Applied Magnus Holmgren's patch to fix Bugzilla #98: transport's home
2017 directory not expanded when it should be if an expanded home directory
2018 was set for the address (which is overridden by the transport).
2020 PH/05 Applied Alex Kiernan's patch to fix Bugzilla #99: a problem with
2023 PH/06 Added acl_not_smtp_start, based on Johannes Berg's patch, and set the
2024 bit to forbid control=suppress_local_fixups in the acl_not_smtp ACL,
2025 because it is too late at that time, and has no effect.
2027 PH/07 Changed ${quote_pgsql to quote ' as '' instead of \' because of a
2028 security issue with \' (bugzilla #107). I could not use the
2029 PQescapeStringConn() function, because it needs a PGconn value as one of
2032 PH/08 When testing addresses using -bt, indicate those final addresses that
2033 are duplicates that would not cause an additional delivery. At least one
2034 person was confused, thinking that -bt output corresponded to deliveries.
2035 (Suppressing duplicates isn't a good idea as you lose the information
2036 about possibly different redirections that led to the duplicates.)
2038 PH/09 Applied patch from Erik to use select() instead of poll() in spam.c on
2039 systems where poll() doesn't work, in particular OS X.
2041 PH/10 Added more information to debugging output for retry time not reached.
2043 PH/11 Applied patch from Arkadiusz Miskiewicz to apply a timeout to read
2044 operations in malware.c.
2046 PH/12 Applied patch from Magnus Holmgren to include the "h" tag in Domain Keys
2049 PH/13 If write_rejectlog was set false when logging was sent to syslog with
2050 syslog_duplication set false, log lines that would normally be written
2051 both the the main log and to the reject log were not written to syslog at
2054 PH/14 In the default configuration, change the use of "message" in ACL warn
2055 statements to "add_header".
2057 PH/15 Diagnose a filter syntax error for "seen", "unseen", or "noerror" if not
2058 not followed by a command (e.g. "seen endif").
2060 PH/16 Recognize SMTP codes at the start of "message" in ACLs and after :fail:
2061 and :defer: in a redirect router. Add forbid_smtp_code to suppress the
2064 PH/17 Added extra conditions to the default value of delay_warning_condition
2068 { !eq{$h_list-id:$h_list-post:$h_list-subscribe:}{} } \
2069 { match{$h_precedence:}{(?i)bulk|list|junk} } \
2070 { match{$h_auto-submitted:}{(?i)auto-generated|auto-replied} } \
2073 The Auto-Submitted: and various List- headers are standardised, whereas I
2074 don't think Precedence: ever was.
2076 PH/18 Refactored debugging code in route_finduser() to show more information,
2077 in particular, the error code if getpwnam() issues one.
2079 PH/19 Added PQsetClientEncoding(conn, "SQL_ASCII") to the pgsql code module.
2080 This is apparently needed in addition to the PH/07 change above to avoid
2081 any possible encoding problems.
2083 PH/20 Perl can change the locale. Exim was resetting it after a ${perl call,
2084 but not after initializing Perl.
2086 PH/21 Added a call to PQsetNoticeProcessor() to catch pgsql "notices" and
2087 output them only if debugging. By default they are written stderr,
2088 apparently, which is not desirable.
2090 PH/22 Added Alain Williams' LDAP patch to support setting REFERRALS=off on
2093 JJ/01 exipick: added --reverse (and -R synonym), --random, --size, --sort and
2096 JJ/02 exipick: rewrote --help documentation to hopefully make more clear.
2098 PH/23 Made -oMaa and -oMt work with -bh and -bs to pretend the connection is
2099 authenticated or an ident call has been made. Suppress the default
2100 values for $authenticated_id and $authenticated_sender (but permit -oMai
2101 and -oMas) when testing with -bh.
2103 PH/24 Re-jigged the order of the tests in the default configuration so that the
2104 tests for valid domains and recipients precede the DNS black list and CSA
2105 tests, on the grounds that those ones are more expensive.
2107 PH/25 Exim was not testing for a space following SMTP commands such as EHLO
2108 that require one. Thus, EHLORHUBARB was interpreted as a valid command.
2109 This bug exists in every version of Exim that I still have, right back to
2112 PH/26 (n)wildlsearch lookups are documented as being done case-insensitively.
2113 However, an attempt to turn on case-sensitivity in a regex key by
2114 including (?-i) didn't work because the subject string was already
2115 lowercased, and the effects were non-intuitive. It turns out that a
2116 one-line patch can be used to allow (?-i) to work as expected.
2122 TF/01 Fix the add_header change below (4.61 PH/55) which had a bug that (amongst
2123 other effects) broke the use of negated acl sub-conditions.
2125 PH/01 ${readsocket now supports Internet domain sockets (modified John Jetmore
2128 PH/02 When tcp-wrappers is called from Exim, it returns only "deny" or "allow".
2129 "Deny" causes Exim to reject the incoming connection with a 554 error.
2130 Unfortunately, if there is a major crisis, such as a disk failure,
2131 tcp-wrappers gives "deny", whereas what one would like would be some
2132 kind of temporary error. A kludge has been added to help with this.
2133 Before calling hosts_ctl(), errno is set zero. If the result is "deny", a
2134 554 error is used if errno is still zero or contains ENOENT (which occurs
2135 if either of the /etc/hosts.{allow,deny} files is missing). Otherwise, a
2138 PH/03 Add -lutil to the default FreeBSD LIBS setting.
2140 PH/04 Change PH/19 for 4.61 was too wide. It should not be applied to host
2141 errors. Otherwise a message that provokes a temporary error (when other
2142 messages do not) can cause a whole host to time out.
2144 PH/05 Batch deliveries by appendfile and pipe transports did not work when the
2145 addresses were routed directly to files or pipes from a redirect router.
2146 File deliveries just didn't batch; pipe deliveries might have suffered
2149 PH/06 A failure to get a lock for a hints database would erroneously always say
2150 "Failed to get write lock", even when it was really a read lock.
2152 PH/07 The appendfile transport was creating MBX lock files with a fixed mode
2153 of 0600. This has been changed to use the value of the lockfile_mode
2154 option (which defaults to 0600).
2156 PH/08 Applied small patch from the Sieve maintainer.
2158 PH/09 If maildir_quota_directory_regex was set to exclude (say) the .Trash
2159 folder from quota calculations, a direct delivery into this folder messed
2160 up the contents of the maildirsize file. This was because the regex was
2161 used only to exclude .Trash (or whatever) when the size of the mailbox
2162 was calculated. There was no check that a delivery was happening into an
2163 excluded directory. This bug has been fixed by ignoring all quota
2164 processing for deliveries into excluded directories.
2166 PH/10 Added the maildirfolder_create_regex option to appendfile.
2172 PH/01 The code for finding all the local interface addresses on a FreeBSD
2173 system running IPv6 was broken. This may well have applied to all BSD
2174 systems, as well as to others that have similar system calls. The broken
2175 code found IPv4 interfaces correctly, but gave incorrect values for the
2176 IPv6 interfaces. In particular, ::1 was not found. The effect in Exim was
2177 that it would not match correctly against @[] and not recognize the IPv6
2180 PH/02 The ipliteral router was not recognizing addresses of the form user@
2181 [ipv6:....] because it didn't know about the "ipv6:" prefix.
2183 PH/03 Added disable_ipv6.
2185 PH/04 Changed $reply_address to use the raw form of the headers instead of the
2186 decoded form, because it is most often used to construct To: headers
2187 lines in autoreplies, and the decoded form may well be syntactically
2188 invalid. However, $reply_address has leading white space removed, and all
2189 newlines turned into spaces so that the autoreply transport does not
2192 PH/05 If group was specified without a user on a router, and no group or user
2193 was specified on a transport, the group from the router was ignored.
2195 PH/06 Increased the number of ACL variables to 20 of each type, and arranged
2196 for visible compile-time settings that can be used to change these
2197 numbers, for those that want even more. Backwards compatibility with old
2198 spool files has been maintained. However, going back to a previous Exim
2199 release will lost any variables that are in spool files.
2201 PH/07 Two small changes when running in the test harness: increase delay when
2202 passing a TCP/IP connection to a new process, in case the original
2203 process has to generate a bounce, and remove special handling of
2204 127.0.0.2 (sic), which is no longer necessary.
2206 PH/08 Changed debug output of dbfn_open() flags from numbers to names, so as to
2207 be the same on different OS.
2209 PH/09 Moved a debug statement in filter processing to avoid a race problem when
2212 JJ/01 exipick: fixed bug where -b (brief) output option showed "Vars:"
2213 whether --show-vars was specified or not
2215 JJ/02 exipick: Added support for new ACL variable spool format introduced
2218 PH/10 Fixed another bug related to PH/04 above: if an incoming message had a
2219 syntactically invalid From: or Reply-to: line, and a filter used this to
2220 generate an autoreply, and therefore failed to obtain an address for the
2221 autoreply, Exim could try to deliver to a non-existent relative file
2222 name, causing unrelated and misleading errors. What now happens is that
2223 it logs this as a hard delivery error, but does not attempt to create a
2226 PH/11 The exinext utility has a -C option for testing purposes, but although
2227 the given file was scanned by exinext itself; it wasn't being passed on
2228 when Exim was called.
2230 PH/12 In the smtp transport, treat an explicit ECONNRESET error the same as
2231 an end-of-file indication when reading a command response.
2233 PH/13 Domain literals for IPv6 were not recognized unless IPv6 support was
2234 compiled. In many other places in Exim, IPv6 addresses are always
2235 recognized, so I have changed this. It also means that IPv4 domain
2236 literals of the form [IPV4:n.n.n.n] are now always recognized.
2238 PH/14 When a uid/gid is specified for the queryprogram router, it cannot be
2239 used if the router is not running as root, for example, when verifying at
2240 ACL time, or when using -bh. The debugging output from this situation was
2241 non-existent - all you got was a failure to exec. I have made two
2244 (a) Failures to set uid/gid, the current directory, or a process leader
2245 in a subprocess such as that created by queryprogram now generate
2246 suitable debugging ouput when -d is set.
2248 (b) The queryprogram router detects when it is not running as root,
2249 outputs suitable debugging information if -d is set, and then runs
2250 the subprocess without attempting to change uid/gid.
2252 PH/15 Minor change to Makefile for building test_host (undocumented testing
2255 PH/16 As discussed on the list in Nov/Dec: Exim no longer looks at the
2256 additional section of a DNS packet that returns MX or SRV records.
2257 Instead, it always explicitly searches for A/AAAA records. This avoids
2258 major problems that occur when a DNS server includes only records of one
2259 type (A or AAAA) in an MX/SRV packet. A byproduct of this change has
2260 fixed another bug: if SRV records were looked up and the corresponding
2261 address records were *not* found in the additional section, the port
2262 values from the SRV records were lost.
2264 PH/17 If a delivery to a pipe, file, or autoreply was deferred, Exim was not
2265 using the correct key (the original address) when searching the retry
2266 rules in order to find which one to use for generating the retry hint.
2268 PH/18 If quota_warn_message contains a From: header, Exim now refrains from
2269 adding the default one. Similarly, if it contains a Reply-To: header, the
2270 errors_reply_to option, if set, is not used.
2272 PH/19 When calculating a retry time, Exim used to measure the "time since
2273 failure" by looking at the "first failed" field in the retry record. Now
2274 it does not use this if it is later than than the arrival time of the
2275 message. Instead it uses the arrival time. This makes for better
2276 behaviour in cases where some deliveries succeed, thus re-setting the
2277 "first failed" field. An example is a quota failure for a huge message
2278 when small messages continue to be delivered. Without this change, the
2279 "time since failure" will always be short, possible causing more frequent
2280 delivery attempts for the huge message than are intended.
2281 [Note: This change was subsequently modified - see PH/04 for 4.62.]
2283 PH/20 Added $auth1, $auth2, $auth3 to contain authentication data (as well as
2284 $1, $2, $3) because the numerical variables can be reset during some
2285 expansion items (e.g. "match"), thereby losing the authentication data.
2287 PH/21 Make -bV show the size of off_t variables so that the test suite can
2288 decide whether to run tests for quotas > 2G.
2290 PH/22 Test the values given for quota, quota_filecount, quota_warn_threshold,
2291 mailbox_size, and mailbox_filecount in the appendfile transport. If a
2292 filecount value is greater than 2G or if a quota value is greater than 2G
2293 on a system where the size of off_t is not greater than 4, a panic error
2296 PH/23 When a malformed item such as 1.2.3/24 appears in a host list, it can
2297 never match. The debug and -bh output now contains an explicit error
2298 message indicating a malformed IPv4 address or mask.
2300 PH/24 An host item such as 1.2.3.4/abc was being treated as the IP address
2301 1.2.3.4 without a mask. Now it is not recognized as an IP address, and
2302 PH/23 above applies.
2304 PH/25 Do not write to syslog when running in the test harness. The only
2305 occasion when this arises is a failure to open the main or panic logs
2306 (for which there is an explicit test).
2308 PH/26 Added the /no_tell option to "control=freeze".
2310 PH/27 If a host name lookup failed very early in a connection, for example, if
2311 the IP address matched host_lookup and the reverse lookup yielded a name
2312 that did not have a forward lookup, an error message of the form "no IP
2313 address found for host xxx.xxx.xxx (during SMTP connection from NULL)"
2314 could be logged. Now it outputs the IP address instead of "NULL".
2316 PH/28 An enabling patch from MH: add new function child_open_exim2() which
2317 allows the sender and the authenticated sender to be set when
2318 submitting a message from within Exim. Since child_open_exim() is
2319 documented for local_scan(), the new function should be too.
2321 PH/29 In GnuTLS, a forced expansion failure for tls_privatekey was not being
2322 ignored. In both GnuTLS and OpenSSL, an expansion of tls_privatekey that
2323 results in an empty string is now treated as unset.
2325 PH/30 Fix eximon buffer overflow bug (Bugzilla #73).
2327 PH/31 Added sender_verify_fail logging option.
2329 PH/32 In November 2003, the code in Exim that added an empty Bcc: header when
2330 needed by RFC 822 but not by RFC 2822 was commented out. I have now
2331 tidied the source and removed it altogether.
2333 PH/33 When a queue run was abandoned because the load average was too high, a
2334 log line was always written; now it is written only if the queue_run log
2335 selector is set. In addition, the log line for abandonment now contains
2336 information about the queue run such as the pid. This is always present
2337 in "start" and "stop" lines but was omitted from the "abandon" line.
2339 PH/34 Omit spaces between a header name and the colon in the error message that
2340 is given when verify = headers_syntax fails (if there are lots of them,
2341 the message gets confusing).
2343 PH/35 Change the default for dns_check_names_pattern to allow slashes within
2344 names, as there are now some PTR records that contain slashes. This check
2345 is only to protect against broken name servers that fall over on strange
2346 characters, so the fact that it applies to all lookups doesn't matter.
2348 PH/36 Now that the new test suite is complete, we can remove some of the
2349 special code in Exim that was needed for the old test suite. For example,
2350 sorting DNS records because real resolvers return them in an arbitrary
2351 order. The new test suite's fake resolver always returns records in the
2354 PH/37 When running in the test harness, use -odi for submitted messages (e.g.
2355 bounces) except when queue_only is set, to avoid logging races between
2356 the different processes.
2358 PH/38 Panic-die if .include specifies a non-absolute path.
2360 PH/39 A tweak to the "H" retry rule from its user.
2362 JJ/03 exipick: Removed parentheses from 'next' and 'last' calls that specified
2363 a label. They prevented compilation on older perls.
2365 JJ/04 exipick: Refactored code to prevent implicit split to @_ which caused
2366 a warning to be raised on newish perls.
2368 JJ/05 exipick: Fixed bug where -bpc always showed a count of all messages
2369 on queue. Changes to match documented behaviour of showing count of
2370 messages matching specified criteria.
2372 PH/40 Changed the default ident timeout from 30s to 5s.
2374 PH/41 Added support for the use of login_cap features, on those BSD systems
2375 that have them, for controlling the resources used by pipe deliveries.
2377 PH/42 The content-scanning code uses fopen() to create files in which to put
2378 message data. Previously it was not paying any attention to the mode of
2379 the files. Exim runs with umask(0) because the rest of the code creates
2380 files with open(), and sets the required mode explicitly. Thus, these
2381 files were ending up world-writeable. This was not a big issue, because,
2382 being within the spool directory, they were not world-accessible. I have
2383 created a function called modefopen, which takes an additional mode
2384 argument. It sets umask(777), creates the file, chmods it to the required
2385 mode, then resets the umask. All the relevant calls to fopen() in the
2386 content scanning code have been changed to use this function.
2388 PH/43 If retry_interval_max is set greater than 24 hours, it is quietly reset
2389 to 24 hours. This avoids potential overflow problems when processing G
2390 and H retry rules. I suspect nobody ever tinkers with this value.
2392 PH/44 Added STRIP_COMMAND=/usr/bin/strip to the FreeBSD Makefile.
2394 PH/45 When the plaintext authenticator is running as a client, the server's
2395 challenges are checked to ensure they are valid base64 strings. By
2396 default, the authentication attempt is cancelled if an invalid string is
2397 received. Setting client_ignore_invalid_base64 true ignores these errors.
2398 The decoded challenge strings are now placed in $auth1, $auth2, etc. as
2399 they are received. Thus, the responses can be made to depend on the
2400 challenges. If an invalid string is ignored, an empty string is placed in
2403 PH/46 Messages that are created by the autoreply transport now contains a
2404 References: header, in accordance with RFCs 2822 and 3834.
2406 PH/47 Added authenticated_sender_force to the smtp transport.
2408 PH/48 The ${prvs expansion was broken on systems where time_t was long long.
2410 PH/49 Installed latest patch from the Sieve maintainer.
2412 PH/50 When an Exim quota was set without a file count quota, and mailbox_size
2413 was also set, the appendfile transport was unnecessarily scanning a
2414 directory of message files (e.g. for maildir delivery) to find the count
2415 of files (along with the size), even though it did not need this
2416 information. It now does the scan only if it needs to find either the
2417 size of the count of files.
2419 PH/51 Added ${time_eval: to convert Exim time strings into seconds.
2421 PH/52 Two bugs concerned with error handling when the smtp transport is
2424 (i) Exim was not creating retry information for temporary errors given
2425 for individual recipients after the DATA command when the smtp transport
2426 was used in LMTP mode. This meant that they could be retried too
2427 frequently, and not timed out correctly.
2429 (ii) Exim was setting the flag that allows error details to be returned
2430 for LMTP errors on RCPT commands, but not for LMTP errors for individual
2431 recipients that were returned after the DATA command.
2433 PH/53 This is related to PH/52, but is more general: for any failing address,
2434 when detailed error information was permitted to be returned to the
2435 sender, but the error was temporary, then after the final timeout, only
2436 "retry timeout exceeded" was returned. Now it returns the full error as
2437 well as "retry timeout exceeded".
2439 PH/54 Added control=allow_auth_unadvertised, as it seems there are clients that
2440 do this, and (what is worse) MTAs that accept it.
2442 PH/55 Added the add_header modified to ACLs. The use of "message" with "warn"
2443 will now be deprecated.
2445 PH/56 New os.c-cygwin from the Cygwin maintainer.
2447 JJ/06 exipick: added --unsorted option to allow unsorted output in all output
2448 formats (previously only available in exim formats via -bpr, -bpru,
2449 and -bpra. Now also available in native and exiqgrep formats)
2451 JJ/07 exipick: added --freeze and --thaw options to allow faster interaction
2452 with very large, slow to parse queues
2454 JJ/08 exipick: added ! as generic prefix to negate any criteria format
2456 JJ/09 exipick: miscellaneous performance enhancements (~24% improvements)
2458 PH/57 Tidies in SMTP dialogue display in debug output: (i) It was not showing
2459 responses to authentication challenges, though it was showing the
2460 challenges; (ii) I've removed the CR characters from the debug output for
2463 PH/58 Allow for the insertion of a newline as well as a space when a string
2464 is turned into more than one encoded-word during RFC 2047 encoding. The
2465 Sieve code now uses this.
2467 PH/59 Added the following errors that can be detected in retry rules: mail_4xx,
2468 data_4xx, lost_connection, tls_required.
2470 PH/60 When a VRFY deferred or FAILED, the log message rather than the user
2471 message was being sent as an SMTP response.
2473 PH/61 Add -l and -k options to exicyclog.
2475 PH/62 When verifying, if an address was redirected to one new address, so that
2476 verification continued, and the new address failed or deferred after
2477 having set something in $address_data, the value of $address_data was not
2478 passed back to the ACL. This was different to the case when no
2479 redirection occurred. The value is now passed back in both cases.
2481 PH/63 Changed the macro HAVE_LOGIN_CAP (see PH/41 for this release above) to
2482 HAVE_SETCLASSRESOURCES because there are different APIs in use that all
2483 use login_cap.h, so on its own it isn't the distinguishing feature. The
2484 new name refers directly to the setclassresources() function.
2486 PH/65 Added configuration files for NetBSD3.
2488 PH/66 Updated OS/Makefile-HP-UX for gcc 4.1.0 with HP-UX 11.
2490 PH/67 Fixed minor infelicity in the sorting of addresses to ensure that IPv6
2491 is preferred over IPv4.
2493 PH/68 The bounce_return_message and bounce_return_body options were not being
2494 honoured for bounces generated during the reception of non-SMTP messages.
2495 In particular, this applied to messages rejected by the ACL. This bug has
2496 been fixed. However, if bounce_return_message is true and bounce_return_
2497 body is false, the headers that are returned for a non-SMTP message
2498 include only those that have been read before the error was detected.
2499 (In the case of an ACL rejection, they have all been read.)
2501 PH/69 The HTML version of the specification is now built in a directory called
2502 spec_html instead of spec.html, because the latter looks like a path with
2503 a MIME-type, and this confuses some software.
2505 PH/70 Catch two compiler warnings in sieve.c.
2507 PH/71 Fixed an obscure and subtle bug (thanks Alexander & Matthias). The
2508 function verify_get_ident() calls ip_connect() to connect a socket, but
2509 if the "connect()" function timed out, ip_connect() used to close the
2510 socket. However, verify_get_ident() also closes the socket later, and in
2511 between Exim writes to the log, which may get opened at this point. When
2512 the socket was closed in ip_connect(), the log could get the same file
2513 descriptor number as the socket. This naturally causes chaos. The fix is
2514 not to close the socket in ip_connect(); the socket should be closed by
2515 the function that creates it. There was only one place in the code where
2516 this was missing, in the iplookup router, which I don't think anybody now
2517 uses, but I've fixed it anyway.
2519 PH/72 Make dns_again_means_nonexist apply to lookups using gethostbyname() as
2520 well as to direct DNS lookups. Otherwise the handling of names in host
2521 lists is inconsistent and therefore confusing.
2527 PH/01 Two changes to the default runtime configuration:
2529 (1) Move the checks for relay_from_hosts and authenticated clients from
2530 after to before the (commented out) DNS black list checks.
2532 (2) Add control=submission to the relay_from_hosts and authenticated
2533 clients checks, on the grounds that messages accepted by these
2534 statements are most likely to be submissions.
2536 PH/02 Several tidies to the handling of ${prvs and ${prvscheck:
2538 (1) Generate an error if the third argument for the ${prvs expansion is
2541 (2) Treat a missing third argument of ${prvscheck as if it were an empty
2544 (3) Reset the variables that are obtained from the first argument of
2545 ${prvscheck and used in the second argument before leaving the code,
2546 because their memory is reclaimed, so using them afterwards may do
2549 (4) Tidy up the code for expanding the arguments of ${prvscheck one by
2550 one (it's much easier than Tom thought :-).
2552 (5) Because of (4), we can now allow for the use of $prvscheck_result
2553 inside the third argument.
2555 PH/03 For some reason, the default setting of PATH when running a command from
2556 a pipe transport was just "/usr/bin". I have changed it to
2559 PH/04 SUPPORT_TRANSLATE_IP_ADDRESS and MOVE_FROZEN_MESSAGES did not cause
2560 anything to be listed in the output from -bV.
2562 PH/05 When a filter generated an autoreply, the entire To: header line was
2563 quoted in the delivery log line, like this:
2565 => >A.N.Other <ano@some.domain> <original@ddress> ...
2567 This has been changed so that it extracts the operative address. There
2568 may be more than one such address. If so, they are comma-separated, like
2571 => >ano@some.domain,ona@other.domain <original@ddress> ...
2573 PH/06 When a client host used a correct literal IP address in a HELO or EHLO
2574 command, (for example, EHLO [1.2.3.4]) and the client's IP address was
2575 not being looked up in the rDNS to get a host name, Exim was showing the
2576 IP address twice in Received: lines, even though the IP addresses were
2577 identical. For example:
2579 Received: from [1.2.3.4] (helo=[1.2.3.4])
2581 However, if the real host name was known, it was omitting the HELO data
2582 if it matched the actual IP address. This has been tidied up so that it
2583 doesn't show the same IP address twice.
2585 PH/07 When both +timestamp and +memory debugging was on, the value given by
2586 $tod_xxx expansions could be wrong, because the tod_stamp() function was
2587 called by the debug printing, thereby overwriting the timestamp buffer.
2588 Debugging no longer uses the tod_stamp() function when +timestamp is set.
2590 PH/08 When the original message was included in an autoreply transport, it
2591 always said "this is a copy of the message, including all the headers",
2592 even if body_only or headers_only was set. It now gives an appropriate
2595 PH/09 Applied a patch from the Sieve maintainer which:
2597 o fixes some comments
2598 o adds the (disabled) notify extension core
2599 o adds some debug output for the result of if/elsif tests
2600 o points to the current vacation draft in the documentation
2601 and documents the missing references header update
2605 o fixes a bug in processing the envelope test (when testing
2606 multiple envelope elements, the last element determinted the
2609 PH/10 Exim was violating RFC 3834 ("Recommendations for Automatic Responses to
2610 Electronic Mail") by including:
2612 Auto-submitted: auto-generated
2614 in the messages that it generates (bounce messages and others, such as
2615 warnings). In the case of bounce messages for non-SMTP mesages, there was
2616 also a typo: it was using "Auto_submitted" (underscore instead of
2617 hyphen). Since every message generated by Exim is necessarily in response
2618 to another message, thes have all been changed to:
2620 Auto-Submitted: auto-replied
2622 in accordance with these statements in the RFC:
2624 The auto-replied keyword:
2626 - SHOULD be used on messages sent in direct response to another
2627 message by an automatic process,
2629 - MUST NOT be used on manually-generated messages,
2631 - MAY be used on Delivery Status Notifications (DSNs) and Message
2632 Disposition Notifications (MDNs),
2634 - MUST NOT be used on messages generated by automatic or periodic
2635 processes, except for messages which are automatic responses to
2638 PH/11 Added "${if def:sender_address {(envelope-from <$sender_address>)\n\t}}"
2639 to the default Received: header definition.
2641 PH/12 Added log selector acl_warn_skipped (default on).
2643 PH/13 After a successful wildlsearch lookup, discard the values of numeric
2644 variables because (a) they are in the wrong storage pool and (b) even if
2645 they were copied, it wouldn't work properly because of the caching.
2647 PH/14 Add check_rfc2047_length to disable enforcement of RFC 2047 length
2648 checking when decoding. Apparently there are clients that generate
2649 overlong encoded strings. Why am I not surprised?
2651 PH/15 If the first argument of "${if match_address" was not empty, but did not
2652 contain an "@" character, Exim crashed. Now it writes a panic log message
2653 and treats the condition as false.
2655 PH/16 In autoreply, treat an empty string for "once" the same as unset.
2657 PH/17 A further patch from the Sieve maintainer: "Introduce the new Sieve
2658 extension "envelope-auth". The code is finished and in agreement with
2659 other implementations, but there is no documentation so far and in fact,
2660 nobody wrote the draft yet. This extension is currently #undef'ed, thus
2661 not changing the active code.
2663 Print executed "if" and "elsif" statements when debugging is used. This
2664 helps a great deal to understand what a filter does.
2666 Document more things not specified clearly in RFC3028. I had all this
2667 sorted out, when out of a sudden new issues came to my mind. Oops."
2669 PH/18 Exim was not recognizing the "net-" search type prefix in match_ip lists
2672 PH/19 Exim expands the IPv6 address given to -bh to its full non-abbreviated
2673 canonical form (as documented). However, after a host name lookup from
2674 the IP address, check_host() was doing a simple string comparison with
2675 addresses acquired from the DNS when checking that the found name did
2676 have the original IP as one of its addresses. Since any found IPv6
2677 addresses are likely to be in abbreviated form, the comparison could
2678 fail. Luckily, there already exists a function for doing the comparison
2679 by converting both addresses to binary, so now that is used instead of
2680 the text comparison.
2682 PH/20 There was another similar case to PH/19, when a complete host name was
2683 given in a host list; looking up its IP address could give an abbreviated
2684 form, whereas the current host's name might or might not be abbreviated.
2685 The same fix has been applied.
2691 PH/01 The ${base62: operator adjusted itself to base 36 when BASE_62 was
2692 set to 36 (for Darwin and Cygwin), but the ${base62d: operator did not.
2695 PH/02 Two minor problems detected in Cygwin: the os.{c,h} files had lost */ on
2696 the CVS lines, and there was a missing #if HAVE_IPV6 in host.c.
2698 PH/03 Typo: missing ".o" in src/pcre/Makefile.
2700 PH/04 Tighten up "personal" tests: Instead of testing for any "List-"
2701 header line, restrict the check to what is listed in RFCs 2369 and 2929.
2702 Also, for "Auto-Submitted", treat anything other than "no" as
2703 non-personal, in accordance with RFC 3834. (Previously it treated
2704 anything starting "auto-" as non-personal.)
2706 TF/01 The control=submission/name=... option had a problem with syntax
2707 errors if the name included a slash character. The /name= option
2708 now slurps the rest of the string, so it can include any characters
2709 but it must come last in the list of options (after /sender_retain
2712 PH/05 Some modifications to the interface to the fake nameserver for the new
2720 TK/01 Added the "success_on_redirect" address verification option. See
2721 NewStuff for rationale and an example.
2723 PH/01 Added support for SQLite, basic code supplied by David Woodhouse.
2725 PH/02 Patch to exigrep to allow it to work on syslog lines.
2727 PH/03 When creating an mbox file for a virus/spam scan, use fseek() instead of
2728 fread() to skip over the body file's header line, because in Cygwin the
2729 header line is locked and is inaccessible.
2731 PH/04 Added $message_exim_id, ultimately to replace $message_id (they will both
2732 co-exist for some time) to make it clear that it is the Exim ID that is
2733 referenced, not the Message-ID: header line.
2735 PH/05 Replaced all Tom's calls to snprintf() with calls to the internal
2736 string_format() function, because snprintf() does not exist on all
2739 PH/06 The use of forbid_filter_existstest now also locks out the use of the
2740 ${stat: expansion item.
2742 PH/07 Changed "SMTP protocol violation: synchronization error" into "SMTP
2743 protocol synchronization error", to keep the pedants happy.
2745 PH/08 Arrange for USE_INET_NTOA_FIX to be set in config.h for AIX systems as
2746 well as for IRIX systems, when gcc is being used. See the host.c source
2749 PH/09 Installed latest Cygwin configuration files from the Cygwin maintainer.
2751 PH/10 Named domain lists were not working if used in a queue_smtp_domains
2754 PH/11 Added support for the IGNOREQUOTA extension to LMTP, both to the lmtp
2755 transport and to the smtp transport in LMTP mode.
2757 TK/02 Remove one case of BASE64 error detection FTTB (undocumented anyway).
2759 PH/12 There was a missing call to search_tidyup() before the fork() in rda.c to
2760 run a filter in a subprocess. This could lead to confusion in subsequent
2761 lookups in the parent process. There should also be a search_tidyup() at
2762 the end of the subprocess.
2764 PH/13 Previously, if "verify = helo" was set in an ACL, the condition was true
2765 only if the host matched helo_try_verify_hosts, which caused the
2766 verification to occur when the EHLO/HELO command was issued. The ACL just
2767 tested the remembered result. Now, if a previous verification attempt has
2768 not happened, "verify = helo" does it there and then.
2770 JJ/01 exipick: added $message_exim_id variable (see 4.53-PH/04)
2772 TK/03 Fix log output including CR from clamd.
2774 PH/14 A reference to $reply_address when Reply-to: was empty and From: did not
2775 exist provoked a memory error which could cause a segfault.
2777 PH/15 Installed PCRE 6.2
2779 PH/17 Defined BIND_8_COMPAT in the Darwin os.h file.
2781 PH/18 Reversed 4.52/PH/17 because the HP-UX user found it wasn't the cause
2782 of the problem. Specifically, suggested +O2 rather than +O1 for the
2785 PH/19 Added sqlite_lock_timeout option (David Woodhouse's patch).
2787 PH/20 If a delivery was routed to a non-standard port by means of an SRV
2788 record, the port was not correctly logged when the outgoing_port log
2789 selector was set (it logged the transort's default port).
2791 PH/21 Added support for host-specific ports to manualroute, queryprogram,
2792 fallback_hosts, and "hosts" in the smtp transport.
2794 PH/22 If the log selector "outgoing_port" is set, the port is now also given on
2795 host errors such as "Connection refused".
2797 PH/23 Applied a patch to fix problems with exim-4.52 while doing radius
2798 authentication with radiusclient 0.4.9:
2800 - Error returned from rc_read_config was caught wrongly
2801 - Username/password not passed on to radius server due to wrong length.
2803 The presumption is that some radiusclient API changes for 4.51/PH/17
2804 were not taken care of correctly. The code is still untested by me (my
2805 Linux distribution still has 0.3.2 of radiusclient), but it was
2806 contributed by a Radius user.
2808 PH/24 When doing a callout, the value of $domain wasn't set correctly when
2809 expanding the "port" option of the smtp transport.
2811 TK/04 MIME ACL: Fix buffer underrun that occurs when EOF condition is met
2812 while reading a MIME header. Thanks to Tom Hughes for a patch.
2814 PH/24 Include config.h inside local_scan.h so that configuration settings are
2817 PH/25 Make $smtp_command_argument available after all SMTP commands. This means
2818 that in an ACL for RCPT (for example), you can examine exactly what was
2821 PH/26 Exim was recognizing IPv6 addresses of the form [IPv6:....] in EHLO
2822 commands, but it was not correctly comparing the address with the actual
2823 client host address. Thus, it would show the EHLO address in Received:
2824 header lines when this was not necessary.
2826 PH/27 Added the % operator to ${eval:}.
2828 PH/28 Exim tries to create and chdir to its spool directory when it starts;
2829 it should be ignoring failures (because with -C, for example, it has lost
2830 privilege). It wasn't ignoring creation failures other than "already
2833 PH/29 Added "crypteq" to the list of supported features that Exim outputs when
2836 PH/30 Fixed (presumably very longstanding) bug in exim_dbmbuild: if it failed
2837 because an input line was too long, either on its own, or by virtue of
2838 too many continuations, the temporary file was not being removed, and the
2839 return code was incorrect.
2841 PH/31 Missing "BOOL" in function definition in filtertest.c.
2843 PH/32 Applied Sieve patches from the maintainer.
2845 TK/05 Domainkeys: Accomodate for a minor API change in libdomainkeys 0.67.
2847 PH/33 Added "verify = not_blind".
2849 PH/34 There are settings for CHOWN_COMMAND and MV_COMMAND that can be used in
2850 Local/Makefile (with some defaults set). These are used in built scripts
2851 such as exicyclog, but they have never been used in the exim_install
2852 script (though there are many overriding facilities there). I have
2853 arranged that the exim_install script now takes note of these two
2856 PH/35 Installed configuration files for Dragonfly.
2858 PH/36 When a locally submitted message by a trusted user did not contain a
2859 From: header, and the sender address was obtained from -f or from an SMTP
2860 MAIL command, and the trusted user did not use -F to supply a sender
2861 name, $originator_name was incorrectly used when constructing a From:
2862 header. Furthermore, $originator_name was used for submission mode
2863 messages from external hosts without From: headers in a similar way,
2864 which is clearly wrong.
2866 PH/37 Added control=suppress_local_fixups.
2868 PH/38 When log_selector = +received_sender was set, and the addition of the
2869 sender made the log line's construction buffer exactly full, or one byte
2870 less than full, an overflow happened when the terminating "\n" was
2873 PH/39 Added a new log selector, "unknown_in_list", which provokes a log entry
2874 when the result of a list match is failure because a DNS lookup failed.
2876 PH/40 RM_COMMAND is now used in the building process.
2878 PH/41 Added a "distclean" target to the top-level Makefile; it deletes all
2879 the "build-* directories that it finds.
2881 PH/42 (But a TF fix): In a domain list, Exim incorrectly matched @[] if the IP
2882 address in a domain literal was a prefix of an interface address.
2884 PH/43 (Again a TF fix): In the dnslookup router, do not apply widen_domains
2885 when verifying a sender address, unless rewrite_headers is false.
2887 PH/44 Wrote a long comment about why errors_to addresses are verified as
2888 recipients, not senders.
2890 TF/01 Add missing LIBS=-lm to OS/Makefile-OpenBSD which was overlooked when
2891 the ratelimit ACL was added.
2893 PH/45 Added $smtp_command for the full command (cf $smtp_command_argument).
2895 PH/46 Added extra information about PostgreSQL errors to the error string.
2897 PH/47 Added an interface to a fake DNS resolver for use by the new test suite,
2898 avoiding the need to install special zones in a real server. This is
2899 backwards compatible; if it can't find the fake resolver, it drops back.
2900 Thus, both old and new test suites can be run.
2902 TF/02 Added util/ratelimit.pl
2904 TF/03 Minor fix to the ratelimit code to improve its behaviour in case the
2905 clock is set back in time.
2907 TF/04 Fix the ratelimit support in exim_fixdb. Patch provided by Brian
2908 Candler <B.Candler@pobox.com>.
2910 TF/05 The fix for PH/43 was not completely correct; widen_domains is always
2911 OK for addresses that are the result of redirections.
2913 PH/48 A number of further additions for the benefit of the new test suite,
2914 including a fake gethostbyname() that interfaces to the fake DNS resolver
2917 TF/06 The fix for widen_domains has also been applied to qualify_single and
2918 search_parents which are the other dnslookup options that can cause
2921 PH/49 Michael Haardt's randomized retrying, but as a separate retry parameter
2924 PH/50 Make never_users, trusted_users, admin_groups, trusted_groups expandable.
2926 TF/07 Exim produced the error message "an SRV record indicated no SMTP
2927 service" if it encountered an MX record with an empty target hostname.
2928 The message is now "an MX or SRV record indicated no SMTP service".
2930 TF/08 Change PH/13 introduced the possibility that verify=helo may defer,
2931 if the DNS of the sending site is misconfigured. This is quite a
2932 common situation. This change restores the behaviour of treating a
2933 helo verification defer as a failure.
2935 PH/51 If self=fail was set on a router, the bounce message did not include the
2936 actual error message.
2942 TF/01 Added support for Client SMTP Authorization. See NewStuff for details.
2944 PH/01 When a transport filter timed out in a pipe delivery, and the pipe
2945 command itself ended in error, the underlying message about the transport
2946 filter timeout was being overwritten with the pipe command error. Now the
2947 underlying error message should be appended to the second error message.
2949 TK/01 Fix poll() being unavailable on Mac OSX 10.2.
2951 PH/02 Reduce the amount of output that "make" produces by default. Full output
2952 can still be requested.
2954 PH/03 The warning log line about a condition test deferring for a "warn" verb
2955 was being output only once per connection, rather than after each
2956 occurrence (because it was using the same function as for successful
2957 "warn" verbs). This seems wrong, so I have changed it.
2959 TF/02 Two buglets in acl.c which caused Exim to read a few bytes of memory that
2960 it should not have, which might have caused a crash in the right
2961 circumstances, but probably never did.
2963 PH/04 Installed a modified version of Tony Finch's patch to make submission
2964 mode fix the return path as well as the Sender: header line, and to
2965 add a /name= option so that you can make the user's friendly name appear
2968 TF/03 Added the control = fakedefer ACL modifier.
2970 TF/04 Added the ratelimit ACL condition. See NewStuff for details. Thanks to
2971 Mark Lowes for thorough testing.
2973 TK/02 Rewrote SPF support to work with libspf2 versions >1.2.0.
2975 TK/03 Merged latest SRS patch from Miles Wilton.
2977 PH/05 There's a shambles in IRIX6 - it defines EX_OK in unistd.h which conflicts
2978 with the definition in sysexits.h (which is #included earlier).
2979 Fortunately, Exim does not actually use EX_OK. The code used to try to
2980 preserve the sysexits.h value, by assumimg that macro definitions were
2981 scanned for macro replacements. I have been disabused of this notion,
2982 so now the code just undefines EX_OK before #including unistd.h.
2984 PH/06 There is a timeout for writing blocks of data, set by, e.g. data_timeout
2985 in the smtp transport. When a block could not be written in a single
2986 write() function, the timeout was being re-applied to each part-write.
2987 This seems wrong - if the receiver was accepting one byte at a time it
2988 would take for ever. The timeout is now adjusted when this happens. It
2989 doesn't have to be particularly precise.
2991 TK/04 Added simple SPF lookup method in EXPERIMENTAL_SPF. See NewStuff for
2992 details. Thanks to Chris Webb <chris@arachsys.com> for the patch!
2994 PH/07 Added "fullpostmaster" verify option, which does a check to <postmaster>
2995 without a domain if the check to <postmaster@domain> fails.
2997 SC/01 Eximstats: added -xls and the ability to specify output files
2998 (patch written by Frank Heydlauf).
3000 SC/02 Eximstats: use FileHandles for outputing results.
3002 SC/03 Eximstats: allow any combination of xls, txt, and html output.
3004 SC/04 Eximstats: fixed display of large numbers with -nvr option
3006 SC/05 Eximstats: fixed merging of reports with empty tables.
3008 SC/06 Eximstats: added the -include_original_destination flag
3010 SC/07 Eximstats: removed tabs and trailing whitespace.
3012 TK/05 Malware: Improve on aveserver error handling. Patch from Alex Miller.
3014 TK/06 MBOX spool code: Add real "From " MBOX separator line
3015 so the .eml file is really in mbox format (even though
3016 most programs do not really care). Patch from Alex Miller.
3018 TK/07 MBOX spool code: Add X-Envelope-From: and X-Envelope-To: headers.
3019 The latter is generated from $received_to and is only set if the
3020 message has one envelope recipient. SA can use these headers,
3021 obviously out-of-the-box. Patch from Alex Miller.
3023 PH/08 The ${def test on a variable was returning false if the variable's
3024 value was "0", contrary to what the specification has always said!
3025 The result should be true unless the variable is empty.
3027 PH/09 The syntax error of a character other than { following "${if
3028 def:variable_name" (after optional whitespace) was not being diagnosed.
3029 An expansion such as ${if def:sender_ident:{xxx}{yyy}} in which an
3030 accidental colon was present, for example, could give incorrect results.
3032 PH/10 Tidied the code in a number of places where the st_size field of a stat()
3033 result is used (not including appendfile, where other changes are about
3036 PH/11 Upgraded appendfile so that quotas larger than 2G are now supported.
3037 This involved changing a lot of size variables from int to off_t. It
3038 should work with maildirs and everything.
3040 TK/08 Apply fix provided by Michael Haardt to prevent deadlock in case of
3041 spamd dying while we are connected to it.
3043 TF/05 Fixed a ${extract error message typo reported by Jeremy Harris
3046 PH/12 Applied Alex Kiernan's patch for the API change for the error callback
3047 function for BDB 4.3.
3049 PH/13 Changed auto_thaw such that it does not apply to bounce messages.
3051 PH/14 Imported PCRE 6.0; this was more than just a trivial operation because
3052 the sources for PCRE have been re-arranged and more files are now
3055 PH/15 The code I had for printing potentially long long variables in PH/11
3056 above was not the best (it lost precision). The length of off_t variables
3057 is now inspected at build time, and an appropriate printing format (%ld
3058 or %lld) is chosen and #defined by OFF_T_FMT. We also define LONGLONG_T
3059 to be "long long int" or "long int". This is needed for the internal
3060 formatting function string_vformat().
3062 PH/16 Applied Matthew Newton's patch to exicyclog: "If log_file_path is set in
3063 the configuration file to be ":syslog", then the script "guesses" where
3064 the logs files are, rather than using the compiled in default. In our
3065 case the guess is not the same as the compiled default, so the script
3066 suddenly stopped working when I started to use syslog. The patch checks
3067 to see if log_file_path is "". If so, it attempts to read it from exim
3068 with no configuration file to get the compiled in version, before it
3069 falls back to the previous guessing code."
3071 TK/09 Added "prvs" and "prvscheck" expansion items. These help a lot with
3072 implementing BATV in an Exim configuration. See NewStuff for the gory
3075 PH/17 Applied Michael Haardt's patch for HP-UX, affecting only the os.h and
3076 Makefile that are specific to HP-UX.
3078 PH/18 If the "use_postmaster" option was set for a recipient callout together
3079 with the "random" option, the postmaster address was used as the MAIL
3080 FROM address for the random test, but not for the subsequent recipient
3081 test. It is now used for both.
3083 PH/19 Applied Michael Haardt's patch to update Sieve to RFC3028bis. "The
3084 patch removes a few documentation additions to RFC 3028, because the
3085 latest draft now contains them. It adds the new en;ascii-case comparator
3086 and a new error check for 8bit text in MIME parts. Comparator and
3087 require names are now matched exactly. I enabled the subaddress
3088 extension, but it is not well tested yet (read: it works for me)."
3090 PH/20 Added macros for time_t as for off_t (see PH/15 above) and used them to
3091 rework some of the code of TK/09 above to avoid the hardwired use of
3092 "%lld" and "long long". Replaced the call to snprintf() with a call to
3095 PH/21 Added some other messages to those in 4.51/PH/42, namely "All relevant MX
3096 records point to non-existent hosts", "retry timeout exceeded", and
3097 "retry time not reached for any host after a long failure period".
3099 PH/22 Fixed some oversights/typos causing bugs when Exim is compiled with
3100 experimental DomainKeys support:
3102 (1) The filter variables $n0-$n9 and $sn0-$sn9 were broken.
3103 (2) On an error such as an illegally used "control", the wrong name for
3104 the control was given.
3106 These problems did NOT occur unless DomainKeys support was compiled.
3108 PH/23 Added daemon_startup_retries and daemon_startup_sleep.
3110 PH/24 Added ${if match_ip condition.
3112 PH/25 Put debug statements on either side of calls to EXIM_DBOPEN() for hints
3113 databases so that it will be absolutely obvious if a crash occurs in the
3114 DB library. This is a regular occurrence (often caused by mis-matched
3117 PH/26 Insert a lot of missing (void) casts for functions such as chown(),
3118 chmod(), fcntl(), sscanf(), and other functions from stdio.h. These were
3119 picked up on a user's system that detects such things. There doesn't seem
3120 to be a gcc warning option for this - only an attribute that has to be
3121 put on the function's prototype. It seems that in Fedora Core 4 they have
3122 set this on a number of new functions. No doubt there will be more in due
3125 PH/27 If a dnslookup or manualroute router is set with verify=only, it need not
3126 specify a transport. However, if an address that was verified by such a
3127 router was the subject of a callout, Exim crashed because it tried to
3128 read the rcpt_include_affixes from the non-existent transport. Now it
3129 just assumes that the setting of that option is false. This bug was
3130 introduced by 4.51/PH/31.
3132 PH/28 Changed -d+all to exclude +memory, because that information is very
3133 rarely of interest, but it makes the output a lot bigger. People tend to
3134 do -d+all out of habit.
3136 PH/29 Removed support for the Linux-libc5 build, as it is obsolete and the
3137 code in os-type was giving problems when libc.so lives in lib64, like on
3140 PH/30 Exim's DNS code uses the original T_xxx names for DNS record times. These
3141 aren't the modern standard, and it seems that some systems' include files
3142 don't always have them. Exim was already checking for some of the newer
3143 ones like T_AAAA, and defining it itself. I've added checks for all the
3144 record types that Exim uses.
3146 PH/31 When using GnuTLS, if the parameters cache file did not exist, Exim was
3147 not automatically generating a new one, as it is supposed to. This
3148 prevented TLS from working. If the file did exist, but contained invalid
3149 data, a new version was generated, as expected. It was only the case of a
3150 non-existent file that was broken.
3152 TK/10 Domainkeys: Fix a bug in verification that caused a crash in conjunction
3153 with a change in libdomainkeys > 0.64.
3155 TK/11 Domainkeys: Change the logic how the "testing" policy flag is retrieved
3156 from DNS. If the selector record carries the flag, it now has
3157 precedence over the domain-wide flag.
3159 TK/12 Cleared some compiler warnings related to SPF, SRS and DK code.
3161 PH/32 In mua_wrapper mode, if an smtp transport configuration error (such as
3162 the use of a port name that isn't defined in /etc/services) occurred, the
3163 message was deferred as in a normal delivery, and thus remained on the
3164 spool, instead of being failed because of the mua_wrapper setting. This
3165 is now fixed, and I tidied up some of the mua_wrapper messages at the
3168 SC/08 Eximstats: whilst parsing the mainlog(s), store information about
3169 the messages in a hash of arrays rather than using individual hashes.
3170 This is a bit cleaner and results in dramatic memory savings, albeit
3171 at a slight CPU cost.
3173 SC/09 Eximstats: added the -show_rt<list> and the -show_dt<list> flags
3174 as requested by Marc Sherman.
3176 SC/10 Eximstats: added histograms for user specified patterns as requested
3179 SC/11 Eximstats: v1.43 - bugfix for pattern histograms with -h0 specified.
3181 PH/33 Patch from the Cygwin maintainer to add "b" to all occurences of
3182 fopen() in the content-scanning modules that did not already have it.
3188 TK/01 Added Yahoo DomainKeys support via libdomainkeys. See
3189 doc/experimental-spec.txt for details. (http://domainkeys.sf.net)
3191 TK/02 Fix ACL "control" statement not being available in MIME ACL.
3193 TK/03 Fix ACL "regex" condition not being available in MIME ACL.
3195 PH/01 Installed a patch from the Sieve maintainer that allows -bf to be used
3196 to test Sieve filters that use "vacation".
3198 PH/02 Installed a slightly modified version of Nikos Mavrogiannopoulos' patch
3199 that changes the way the GnuTLS parameters are stored in the cache file.
3200 The new format can be generated externally. For backward compatibility,
3201 if the data in the cache doesn't make sense, Exim assumes it has read an
3202 old-format file, and it generates new data and writes a new file. This
3203 means that you can't go back to an older release without removing the
3206 PH/03 A redirect router that has both "unseen" and "one_time" set does not
3207 work if there are any delivery delays because "one_time" forces the
3208 parent to be marked "delivered", so its unseen clone is never tried
3209 again. For this reason, Exim now forbids the simultaneous setting of
3212 PH/04 Change 4.11/85 fixed an obscure bug concerned with addresses that are
3213 redirected to themselves ("homonym" addresses). Read the long ChangeLog
3214 entry if you want to know the details. The fix, however, neglected to
3215 consider the case when local delivery batching is involved. The test for
3216 "previously delivered" was not happening when checking to see if an
3217 address could be batched with a previous (undelivered) one; under
3218 certain circumstances this could lead to multiple deliveries to the same
3221 PH/05 Renamed the macro SOCKLEN_T as EXIM_SOCKLEN_T because AIX uses SOCKLEN_T
3222 in its include files, and this causes problems building Exim.
3224 PH/06 A number of "verify =" ACL conditions have no options (e.g. verify =
3225 header_syntax) but Exim was just ignoring anything given after a slash.
3226 In particular, this caused confusion with an attempt to use "verify =
3227 reverse_host_lookup/defer_ok". An error is now given when options are
3228 supplied for verify items that do not have them. (Maybe reverse_host_
3229 lookup should have a defer_ok option, but that's a different point.)
3231 PH/07 Increase the size of the buffer for incoming SMTP commands from 512 (as
3232 defined by RFC 821) to 2048, because there were problems with some AUTH
3233 commands, and RFC 1869 says the size should be increased for extended
3234 SMTP commands that take arguments.
3236 PH/08 Added ${dlfunc dynamically loaded function for expansion (code from Tony
3239 PH/09 Previously, an attempt to use ${perl when it wasn't compiled gave an
3240 "unknown" error; now it says that the functionality isn't in the binary.
3242 PH/10 Added a nasty fudge to try to recognize and flatten LDAP passwords in
3243 an address' error message when a string expansion fails (syntax or
3244 whatever). Otherwise the password may appear in the log. Following change
3245 PH/42 below, there is no longer a chance of it appearing in a bounce
3248 PH/11 Installed exipick version 20050225.0 from John Jetmore.
3250 PH/12 If the last host in a fallback_hosts list was multihomed, only the first
3251 of its addresses was ever tried. (Bugzilla bug #2.)
3253 PH/13 If "headers_add" in a transport didn't end in a newline, Exim printed
3254 the result incorrectly in the debug output. (It correctly added a newline
3255 to what was transported.)
3257 TF/01 Added $received_time.
3259 PH/14 Modified the default configuration to add an acl_smtp_data ACL, with
3260 commented out examples of how to interface to a virus scanner and to
3261 SpamAssassin. Also added commented examples of av_scanner and
3262 spamd_address settings.
3264 PH/15 Further to TK/02 and TK/03 above, tidied up the tables of what conditions
3265 and controls are allowed in which ACLs. There were a couple of minor
3266 errors. Some of the entries in the conditions table (which is a table of
3267 where they are NOT allowed) were getting very unwieldy; rewrote them as a
3268 negation of where the condition IS allowed.
3270 PH/16 Installed updated OS/os.c-cygwin from the Cygwin maintainer.
3272 PH/17 The API for radiusclient changed at release 0.4.0. Unfortunately, the
3273 header file does not have a version number, so I've had to invent a new
3274 value for RADIUS_LIB_TYPE, namely "RADIUSCLIENTNEW" to request the new
3275 API. The code is untested by me (my Linux distribution still has 0.3.2 of
3276 radiusclient), but it was contributed by a Radius user.
3278 PH/18 Installed Lars Mainka's patch for the support of CRL collections in
3279 files or directories, for OpenSSL.
3281 PH/19 When an Exim process that is running as root has to create an Exim log
3282 file, it does so in a subprocess that runs as exim:exim so as to get the
3283 ownership right at creation (otherwise, other Exim processes might see
3284 the file with the wrong ownership). There was no test for failure of this
3285 fork() call, which would lead to the process getting stuck as it waited
3286 for a non-existent subprocess. Forks do occasionally fail when resources
3287 run out. I reviewed all the other calls to fork(); they all seem to check
3290 PH/20 When checking for unexpected SMTP input at connect time (before writing
3291 the banner), Exim was not dealing correctly with a non-positive return
3292 from the read() function. If the client had disconnected by this time,
3293 the result was a log entry for a synchronization error with an empty
3294 string after "input=" when read() returned zero. If read() returned -1
3295 (an event I could not check), uninitialized data bytes were printed.
3296 There were reports of junk text (parts of files, etc) appearing after
3299 PH/21 Added acl_not_smtp_mime to allow for MIME scanning for non-SMTP messages.
3301 PH/22 Added support for macro redefinition, and (re)definition in between
3302 driver and ACL definitions.
3304 PH/23 The cyrus_sasl authenticator was expanding server_hostname, but then
3305 forgetting to use the resulting value; it was using the unexpanded value.
3307 PH/24 The cyrus_sasl authenticator was advertising mechanisms for which it
3308 hadn't been configured. The fix is from Juergen Kreileder, who
3309 understands it better than I do:
3311 "Here's what I see happening with three configured cyrus_sasl
3312 authenticators configured (plain, login, cram-md5):
3314 On startup auth_cyrus_sasl_init() gets called for each of these.
3315 This means three calls to sasl_listmech() without a specified mech_list.
3316 => SASL tests which mechs of all available mechs actually work
3317 => three warnings about OTP not working
3318 => the returned list contains: plain, login, cram-md5, digest-md5, ...
3320 With the patch, sasl_listmech() also gets called three times. But now
3321 SASL's mech_list option is set to the server_mech specified in the the
3322 authenticator. Or in other words, the answer from sasl_listmech()
3323 gets limited to just the mech you're testing for (which is different
3325 => the return list contains just 'plain' or 'login', 'cram-md5' or
3326 nothing depending on the value of ob->server_mech.
3328 I've just tested the patch: Authentication still works fine,
3329 unavailable mechs specified in the exim configuration are still
3330 caught, and the auth.log warnings about OTP are gone."
3332 PH/25 When debugging is enabled, the contents of the command line are added
3333 to the debugging output, even when log_selector=+arguments is not
3336 PH/26 Change scripts/os-type so that when "uname -s" returns just "GNU", the
3337 answer is "GNU", and only if the return is "GNU/something" is the answer
3340 PH/27 $acl_verify_message is now set immediately after the failure of a
3341 verification in an ACL, and so is available in subsequent modifiers. In
3342 particular, the message can be preserved by coding like this:
3344 warn !verify = sender
3345 set acl_m0 = $acl_verify_message
3347 Previously, $acl_verify_message was set only while expanding "message"
3348 and "log_message" when a very denied access.
3350 PH/28 Modified OS/os.c-Linux with
3352 -#ifndef OS_LOAD_AVERAGE
3353 +#if !defined(OS_LOAD_AVERAGE) && defined(__linux__)
3355 to make Exim compile on kfreebsd-gnu. (I'm totally confused about the
3356 nomenclature these days.)
3358 PH/29 Installed patch from the Sieve maintainer that adds the options
3359 sieve_useraddress and sieve_subaddress to the redirect router.
3361 PH/30 In these circumstances:
3362 . Two addresses routed to the same list of hosts;
3363 . First host does not offer TLS;
3364 . First host accepts first address;
3365 . First host gives temporary error to second address;
3366 . Second host offers TLS and a TLS session is established;
3367 . Second host accepts second address.
3368 Exim incorrectly logged both deliveries with the TLS parameters (cipher
3369 and peerdn, if requested) that were in fact used only for the second
3372 PH/31 When doing a callout as part of verifying an address, Exim was not paying
3373 attention to any local part prefix or suffix that was matched by the
3374 router that accepted the address. It now behaves in the same way as it
3375 does for delivery: the affixes are removed from the local part unless
3376 rcpt_include_affixes is set on the transport.
3378 PH/32 Add the sender address, as F=<...>, to the log line when logging a
3379 timeout during the DATA phase of an incoming message.
3381 PH/33 Sieve envelope tests were broken for match types other than :is. I have
3382 applied a patch sanctioned by the Sieve maintainer.
3384 PH/34 Change 4.50/80 broke Exim in that it could no longer handle cases where
3385 the uid or gid is negative. A case of a negative gid caused this to be
3386 noticed. The fix allows for either to be negative.
3388 PH/35 ACL_WHERE_MIME is now declared unconditionally, to avoid too much code
3389 clutter, but the tables that are indexed by ACL_WHERE_xxx values had been
3392 PH/36 The change PH/12 above was broken. Fixed it.
3394 PH/37 Exim used to check for duplicate addresses in the middle of routing, on
3395 the grounds that routing the same address twice would always produce the
3396 same answer. This might have been true once, but it is certainly no
3397 longer true now. Routing a child address may depend on the previous
3398 routing that produced that child. Some complicated redirection strategies
3399 went wrong when messages had multiple recipients, and made Exim's
3400 behaviour dependent on the order in which the addresses were given.
3402 I have moved the duplicate checking until after the routing is complete.
3403 Exim scans the addresses that are assigned to local and remote
3404 transports, and removes any duplicates. This means that more work will be
3405 done, as duplicates will always all be routed, but duplicates are
3406 presumably rare, so I don't expect this is of any significance.
3408 For deliveries to pipes, files, and autoreplies, the duplicate checking
3409 still happens during the routing process, since they are not going to be
3412 PH/38 Installed a patch from Ian Freislich, with the agreement of Tom Kistner.
3413 It corrects a timeout issue with spamd. This is Ian's comment: "The
3414 background is that sometimes spamd either never reads data from a
3415 connection it has accepted, or it never writes response data. The exiscan
3416 spam.[ch] uses a 3600 second timeout on spamd socket reads, further, it
3417 blindly assumes that writes won't block so it may never time out."
3419 PH/39 Allow G after quota size as well as K and M.
3421 PH/40 The value set for $authenticated_id in an authenticator may not contain
3422 binary zeroes or newlines because the value is written to log lines and
3423 to spool files. There was no check on this. Now the value is run through
3424 the string_printing() function so that such characters are converted to
3425 printable escape sequences.
3427 PH/41 $message_linecount is a new variable that contains the total number of
3428 lines in the message. Compare $body_linecount, which is the count for the
3431 PH/42 Exim no longer gives details of delivery errors for specific addresses in
3432 bounce and delay warning messages, except in certain special cases, which
3435 (a) An SMTP error message from a remote host;
3436 (b) A message specified in a :fail: redirection;
3437 (c) A message specified in a "fail" command in a system filter;
3438 (d) A message specified in a FAIL return from the queryprogram router;
3439 (e) A message specified by the cannot_route_message router option.
3441 In these cases only, Exim does include the error details in bounce and
3442 warning messages. There are also a few cases where bland messages such
3443 as "unrouteable address" or "local delivery error" are given.
3445 PH/43 $value is now also set for the "else" part of a ${run expansion.
3447 PH/44 Applied patch from the Sieve maintainer: "The vacation draft is still
3448 being worked on, but at least Exim now implements the latest version to
3451 PH/45 In a pipe transport, although a timeout while waiting for the pipe
3452 process to complete was treated as a delivery failure, a timeout while
3453 writing the message to the pipe was logged, but erroneously treated as a
3454 successful delivery. Such timeouts include transport filter timeouts. For
3455 consistency with the overall process timeout, these timeouts are now
3456 treated as errors, giving rise to delivery failures by default. However,
3457 there is now a new Boolean option for the pipe transport called
3458 timeout_defer, which, if set TRUE, converts the failures into defers for
3459 both kinds of timeout. A transport filter timeout is now identified in
3462 PH/46 The "scripts/Configure-config.h" script calls "make" at one point. On
3463 systems where "make" and "gmake" are different, calling "gmake" at top
3464 level broke things. I've arranged for the value of $(MAKE) to be passed
3465 from the Makefile to this script so that it can call the same version of
3469 A note about Exim versions 4.44 and 4.50
3470 ----------------------------------------
3472 Exim 4.50 was meant to be the next release after 4.43. It contains a lot of
3473 changes of various kinds. As a consequence, a big documentation update was
3474 needed. This delayed the release for rather longer than seemed good, especially
3475 in the light of a couple of (minor) security issues. Therefore, the changes
3476 that fixed bugs were backported into 4.43, to create a 4.44 maintenance
3477 release. So 4.44 and 4.50 are in effect two different branches that both start
3480 I have left the 4.50 change log unchanged; it contains all the changes since
3481 4.43. The change log for 4.44 is below; many of its items are identical to
3482 those for 4.50. This seems to be the most sensible way to preserve the
3483 historical information.
3489 1. Minor wording change to the doc/README.SIEVE file.
3491 2. Change 4.43/35 introduced a bug: if quota_filecount was set, the
3492 computation of the current number of files was incorrect.
3494 3. Closing a stable door: arrange to panic-die if setitimer() ever fails. The
3495 bug fixed in 4.43/37 would have been diagnosed quickly if this had been in
3498 4. Give more explanation in the error message when the command for a transport
3499 filter fails to execute.
3501 5. There are several places where Exim runs a non-Exim command in a
3502 subprocess. The SIGUSR1 signal should be disabled for these processes. This
3503 was being done only for the command run by the queryprogram router. It is
3504 now done for all such subprocesses. The other cases are: ${run, transport
3505 filters, and the commands run by the lmtp and pipe transports.
3507 6. Added CONFIGURE_GROUP build-time option.
3509 7. Some older OS have a limit of 256 on the maximum number of file
3510 descriptors. Exim was using setrlimit() to set 1000 as a large value
3511 unlikely to be exceeded. Change 4.43/17 caused a lot of logging on these
3512 systems. I've change it so that if it can't get 1000, it tries for 256.
3514 8. "control=submission" was allowed, but had no effect, in a DATA ACL. This
3515 was an oversight, and furthermore, ever since the addition of extra
3516 controls (e.g. 4.43/32), the checks on when to allow different forms of
3517 "control" were broken. There should now be diagnostics for all cases when a
3518 control that does not make sense is encountered.
3520 9. Added the /retain_sender option to "control=submission".
3522 10. $recipients is now available in the predata ACL (oversight).
3524 11. Tidy the search cache before the fork to do a delivery from a message
3525 received from the command line. Otherwise the child will trigger a lookup
3526 failure and thereby defer the delivery if it tries to use (for example) a
3527 cached ldap connection that the parent has called unbind on.
3529 12. If verify=recipient was followed by verify=sender in a RCPT ACL, the value
3530 of $address_data from the recipient verification was clobbered by the
3531 sender verification.
3533 13. The value of address_data from a sender verification is now available in
3534 $sender_address_data in subsequent conditions in the ACL statement.
3536 14. Added forbid_sieve_filter and forbid_exim_filter to the redirect router.
3538 15. Added a new option "connect=<time>" to callout options, to set a different
3541 16. If FIXED_NEVER_USERS was defined, but empty, Exim was assuming the uid 0
3542 was its contents. (It was OK if the option was not defined at all.)
3544 17. A "Completed" log line is now written for messages that are removed from
3545 the spool by the -Mrm option.
3547 18. New variables $sender_verify_failure and $recipient_verify_failure contain
3548 information about exactly what failed.
3550 19. Added -dd to debug only the daemon process.
3552 20. Incorporated Michael Haardt's patch to ldap.c for improving the way it
3553 handles timeouts, both on the server side and network timeouts. Renamed the
3554 CONNECT parameter as NETTIMEOUT (but kept the old name for compatibility).
3556 21. The rare case of EHLO->STARTTLS->HELO was setting the protocol to "smtp".
3557 It is now set to "smtps".
3559 22. $host_address is now set to the target address during the checking of
3560 ignore_target_hosts.
3562 23. When checking ignore_target_hosts for an ipliteral router, no host name was
3563 being passed; this would have caused $sender_host_name to have been used if
3564 matching the list had actually called for a host name (not very likely,
3565 since this list is usually IP addresses). A host name is now passed as
3568 24. Changed the calls that set up the SIGCHLD handler in the daemon to use the
3569 code that specifies a non-restarting handler (typically sigaction() in
3570 modern systems) in an attempt to fix a rare and obscure crash bug.
3572 25. Narrowed the window for a race in the daemon that could cause it to ignore
3573 SIGCHLD signals. This is not a major problem, because they are used only to
3574 wake it up if nothing else does.
3576 26. A malformed maildirsize file could cause Exim to calculate negative values
3577 for the mailbox size or file count. Odd effects could occur as a result.
3578 The maildirsize information is now recalculated if the size or filecount
3581 27. Added HAVE_SYS_STATVFS_H to the os.h file for Linux, as it has had this
3582 support for a long time. Removed HAVE_SYS_VFS_H.
3584 28. Installed the latest version of exipick from John Jetmore.
3586 29. In an address list, if the pattern was not a regular expression, an empty
3587 subject address (from a bounce message) matched only if the pattern was an
3588 empty string. Non-empty patterns were not even tested. This was the wrong
3589 because it is perfectly reasonable to use an empty address as part of a
3590 database query. An empty address is now tested by patterns that are
3591 lookups. However, all the other forms of pattern expect the subject to
3592 contain a local part and a domain, and therefore, for them, an empty
3593 address still always fails if the pattern is not itself empty.
3595 30. Exim went into a mad DNS loop when attempting to do a callout where the
3596 host was specified on an smtp transport, and looking it up yielded more
3597 than one IP address.
3599 31. Re-factored the code for checking spool and log partition space into a
3600 function that finds that data and another that does the check. The former
3601 is then used to implement four new variables: $spool_space, $log_space,
3602 $spool_inodes, and $log_inodes.
3604 32. The RFC2047 encoding function was originally intended for short strings
3605 such as real names; it was not keeping to the 75-character limit for
3606 encoded words that the RFC imposes. It now respects the limit, and
3607 generates multiple encoded words if necessary. To be on the safe side, I
3608 have increased the buffer size for the ${rfc2047: expansion operator from
3611 33. It is now permitted to omit both strings after an "if" condition; if the
3612 condition is true, the result is "true". As before, when the second string
3613 is omitted, a false condition yields an empty string. This makes it less
3614 cumbersome to write custom ACL and router conditions.
3616 34. Failure to deliver a bounce message always caused it to be frozen, even if
3617 there was an errors_to setting on the router. The errors_to setting is now
3620 35. If an IPv6 address is given for -bh or -bhc, it is now converted to the
3621 canonical form (fully expanded) before being placed in
3622 $sender_host_address.
3624 36. The table in the code that translates DNS record types into text (T_A to
3625 "A" for instance) was missing entries for NS and CNAME. It is just possible
3626 that this could have caused confusion if both these types were looked up
3627 for the same domain, because the text type is used as part of Exim's
3628 per-process caching. But the chance of anyone hitting this buglet seems
3631 37. The dnsdb lookup has been extended in a number of ways.
3633 (1) There is a new type, "zns", which walks up the domain tree until it
3634 finds some nameserver records. It should be used with care.
3636 (2) There is a new type, "mxh", which is like "mx" except that it returns
3637 just the host names, not the priorities.
3639 (3) It is now possible to give a list of domains (or IP addresses) to be
3640 looked up. The behaviour when one of the lookups defers can be
3641 controlled by a keyword.
3643 (4) It is now possible to specify the separator character for use when
3644 multiple records are returned.
3646 38. The dnslists ACL condition has been extended: it is now possible to supply
3647 a list of IP addresses and/or domains to be looked up in a particular DNS
3650 39. Added log_selector=+queue_time_overall.
3652 40. When running the queue in the test harness, wait just a tad after forking a
3653 delivery process, to get repeatability of debugging output.
3655 41. Include certificate and key file names in error message when GnuTLS fails
3656 to set them up, because the GnuTLS error message doesn't include the name
3657 of the failing file when there is a problem reading it.
3659 42. Allow both -bf and -bF in the same test run.
3661 43. Did the same fix as 41 above for OpenSSL, which had the same infelicity.
3663 44. The "Exiscan patch" is now merged into the mainline Exim source.
3665 45. Sometimes the final signoff response after QUIT could fail to get
3666 transmitted in the non-TLS case. Testing !tls_active instead of tls_active
3667 < 0 before doing a fflush(). This bug looks as though it goes back to the
3668 introduction of TLS in release 3.20, but "sometimes" must have been rare
3669 because the tests only now provoked it.
3671 46. Reset the locale to "C" after calling embedded Perl, in case it was changed
3672 (this can affect the format of dates).
3674 47. exim_tidydb, when checking for the continued existence of a message for
3675 which it has found a message-specific retry record, was not finding
3676 messages that were in split spool directories. Consequently, it was
3677 deleting retry records that should have stayed in existence.
3679 48. Steve fixed some bugs in eximstats.
3681 49. The SPA authentication driver was not abandoning authentication and moving
3682 on to the next authenticator when an expansion was forced to fail,
3683 contradicting the general specification for all authenticators. Instead it
3684 was generating a temporary error. It now behaves as specified.
3686 50. The default ordering of permitted cipher suites for GnuTLS was pessimal
3687 (the order specifies the preference for clients). The order is now AES256,
3688 AES128, 3DES, ARCFOUR128.
3690 51. Small patch to Sieve code - explicitly set From: when generating an
3693 52. Exim crashed if a remote delivery caused a very long error message to be
3694 recorded - for instance if somebody sent an entire SpamAssassin report back
3695 as a large number of 550 error lines. This bug was coincidentally fixed by
3696 increasing the size of one of Exim's internal buffers (big_buffer) that
3697 happened as part of the Exiscan merge. However, to be on the safe side, I
3698 have made the code more robust (and fixed the comments that describe what
3701 53. Now that there can be additional text after "Completed" in log lines (if
3702 the queue_time_overall log selector is set), a one-byte patch to exigrep
3703 was needed to allow it to recognize "Completed" as not the last thing in
3706 54. The LDAP lookup was not handling a return of LDAP_RES_SEARCH_REFERENCE. A
3707 patch that reportedly fixes this has been added. I am not expert enough to
3708 create a test for it. This is what the patch creator wrote:
3710 "I found a little strange behaviour of ldap code when working with
3711 Windows 2003 AD Domain, where users was placed in more than one
3712 Organization Units. When I tried to give exim partial DN, the exit code
3713 of ldap_search was unknown to exim because of LDAP_RES_SEARCH_REFERENCE.
3714 But simultaneously result of request was absolutely normal ldap result,
3715 so I produce this patch..."
3717 Later: it seems that not all versions of LDAP support LDAP_RES_SEARCH_
3718 REFERENCE, so I have modified the code to exclude the patch when that macro
3721 55. Some experimental protocols are using DNS PTR records for new purposes. The
3722 keys for these records are domain names, not reversed IP addresses. The
3723 dnsdb PTR lookup now tests whether its key is an IP address. If not, it
3724 leaves it alone. Component reversal etc. now happens only for IP addresses.
3727 56. Improve error message when ldap_search() fails in OpenLDAP or Solaris LDAP.
3729 57. Double the size of the debug message buffer (to 2048) so that more of very
3730 long debug lines gets shown.
3732 58. The exicyclog utility now does better if the number of log files to keep
3733 exceeds 99. In this case, it numbers them 001, 002 ... instead of 01, 02...
3735 59. Two changes related to the smtp_active_hostname option:
3737 (1) $smtp_active_hostname is now available as a variable.
3738 (2) The default for smtp_banner uses $smtp_active_hostname instead
3739 of $primary_hostname.
3741 60. The host_aton() function is supposed to be passed a string that is known
3742 to be a valid IP address. However, in the case of IPv6 addresses, it was
3743 not checking this. This is a hostage to fortune. Exim now panics and dies
3744 if the condition is not met. A case was found where this could be provoked
3745 from a dnsdb PTR lookup with an IPv6 address that had more than 8
3746 components; fortuitously, this particular loophole had already been fixed
3747 by change 4.50/55 above.
3749 If there are any other similar loopholes, the new check in host_aton()
3750 itself should stop them being exploited. The report I received stated that
3751 data on the command line could provoke the exploit when Exim was running as
3752 exim, but did not say which command line option was involved. All I could
3753 find was the use of -be with a bad dnsdb PTR lookup, and in that case it is
3754 running as the user.
3757 61. There was a buffer overflow vulnerability in the SPA authentication code
3758 (which came originally from the Samba project). I have added a test to the
3759 spa_base64_to_bits() function which I hope fixes it.
3762 62. Configuration update for GNU/Hurd and variations. Updated Makefile-GNU and
3763 os.h-GNU, and added configuration files for GNUkFreeBSD and GNUkNetBSD.
3765 63. The daemon start-up calls getloadavg() while still root for those OS that
3766 need the first call to be done as root, but it missed one case: when
3767 deliver_queue_load_max is set with deliver_drop_privilege. This is
3768 necessary for the benefit of the queue runner, because there is no re-exec
3769 when deliver_drop_privilege is set.
3771 64. A call to exiwhat cut short delays set up by "delay" modifiers in ACLs.
3772 This has been fixed.
3774 65. Caching of lookup data for "hosts =" ACL conditions, when a named host list
3775 was in use, was not putting the data itself into the right store pool;
3776 consequently, it could be overwritten for a subsequent message in the same
3777 SMTP connection. (Fix 4.40/11 dealt with the non-cache case, but overlooked
3780 66. Added hosts_max_try_hardlimit to the smtp transport, default 50.
3782 67. The string_is_ip_address() function returns 0, 4, or 6, for "no an IP
3783 address", "IPv4 address", and "IPv6 address", respectively. Some calls of
3784 the function were treating the return as a boolean value, which happened to
3785 work because 0=false and not-0=true, but is not correct code.
3787 68. The host_aton() function was not handling scoped IPv6 addresses (those
3788 with, for example, "%eth0" on the end) correctly.
3790 69. Fixed some compiler warnings in acl.c for the bitmaps specified with
3791 negated items (that is, ~something) in unsigned ints. Some compilers
3792 apparently mutter when there is no cast.
3794 70. If an address verification called from an ACL failed, and did not produce a
3795 user-specific message (i.e. there was only a "system" message), nothing was
3796 put in $acl_verify_message. In this situation, it now puts the system
3799 71. Change 4.23/11 added synchronization checking at the start of an SMTP
3800 session; change 4.31/43 added the unwanted input to the log line - except
3801 that it did not do this in the start of session case. It now does.
3803 72. After a timeout in a callout SMTP session, Exim still sent a QUIT command.
3804 This is wrong and can cause the other end to generate a synchronization
3805 error if it is another Exim or anything else that does the synchronization
3806 check. A QUIT command is no longer sent after a timeout.
3808 73. $host_lookup_deferred has been added, to make it easier to detect DEFERs
3809 during host lookups.
3811 74. The defer_ok option of callout verification was not working if it was used
3812 when verifying addresses in header lines, that is, for this case:
3814 verify = header_sender/callout=defer_ok
3816 75. A backgrounded daemon closed stdin/stdout/stderr on entry; this meant that
3817 those file descriptors could be used for SMTP connections. If anything
3818 wrote to stderr (the example that came up was "warn" in embedded Perl), it
3819 could be sent to the SMTP client, causing chaos. The daemon now opens
3820 stdin, stdout, and stderr to /dev/null when it puts itself into the
3823 76. Arrange for output from Perl's "warn" command to be written to Exim's main
3824 log by default. The user can override this with suitable Perl magic.
3826 77. The use of log_message on a "discard" ACL verb, which is supposed to add to
3827 the log message when discard triggers, was not working for the DATA ACL or
3828 for the non-SMTP ACL.
3830 78. Error message wording change in sieve.c.
3832 79. If smtp_accept_max_per_host was set, the number of connections could be
3833 restricted to fewer than expected, because the daemon was trying to set up
3834 a new connection before checking whether the processes handling previous
3835 connections had finished. The check for completed processes is now done
3836 earlier. On busy systems, this bug wouldn't be noticed because something
3837 else would have woken the daemon, and it would have reaped the completed
3840 80. If a message was submitted locally by a user whose login name contained one
3841 or more spaces (ugh!), the spool file that Exim wrote was not re-readable.
3842 It caused a spool format error. I have fixed the spool reading code. A
3843 related problem was that the "from" clause in the Received: line became
3844 illegal because of the space(s). It is now covered by ${quote_local_part.
3846 81. Included the latest eximstats from Steve (adds average sizes to HTML Top
3849 82. Updated OS/Makefile-AIX as per message from Mike Meredith.
3851 83. Patch from Sieve maintainer to fix unterminated string problem in
3852 "vacation" handling.
3854 84. Some minor changes to the Linux configuration files to help with other
3855 OS variants using glibc.
3857 85. One more patch for Sieve to update vacation handling to latest spec.
3860 ----------------------------------------------------
3861 See the note above about the 4.44 and 4.50 releases.
3862 ----------------------------------------------------
3868 1. Change 4.43/35 introduced a bug that caused file counts to be
3869 incorrectly computed when quota_filecount was set in an appendfile
3872 2. Closing a stable door: arrange to panic-die if setitimer() ever fails. The
3873 bug fixed in 4.43/37 would have been diagnosed quickly if this had been in
3876 3. Give more explanation in the error message when the command for a transport
3877 filter fails to execute.
3879 4. There are several places where Exim runs a non-Exim command in a
3880 subprocess. The SIGUSR1 signal should be disabled for these processes. This
3881 was being done only for the command run by the queryprogram router. It is
3882 now done for all such subprocesses. The other cases are: ${run, transport
3883 filters, and the commands run by the lmtp and pipe transports.
3885 5. Some older OS have a limit of 256 on the maximum number of file
3886 descriptors. Exim was using setrlimit() to set 1000 as a large value
3887 unlikely to be exceeded. Change 4.43/17 caused a lot of logging on these
3888 systems. I've change it so that if it can't get 1000, it tries for 256.
3890 6. "control=submission" was allowed, but had no effect, in a DATA ACL. This
3891 was an oversight, and furthermore, ever since the addition of extra
3892 controls (e.g. 4.43/32), the checks on when to allow different forms of
3893 "control" were broken. There should now be diagnostics for all cases when a
3894 control that does not make sense is encountered.
3896 7. $recipients is now available in the predata ACL (oversight).
3898 8. Tidy the search cache before the fork to do a delivery from a message
3899 received from the command line. Otherwise the child will trigger a lookup
3900 failure and thereby defer the delivery if it tries to use (for example) a
3901 cached ldap connection that the parent has called unbind on.
3903 9. If verify=recipient was followed by verify=sender in a RCPT ACL, the value
3904 of $address_data from the recipient verification was clobbered by the
3905 sender verification.
3907 10. If FIXED_NEVER_USERS was defined, but empty, Exim was assuming the uid 0
3908 was its contents. (It was OK if the option was not defined at all.)
3910 11. A "Completed" log line is now written for messages that are removed from
3911 the spool by the -Mrm option.
3913 12. $host_address is now set to the target address during the checking of
3914 ignore_target_hosts.
3916 13. When checking ignore_target_hosts for an ipliteral router, no host name was
3917 being passed; this would have caused $sender_host_name to have been used if
3918 matching the list had actually called for a host name (not very likely,
3919 since this list is usually IP addresses). A host name is now passed as
3922 14. Changed the calls that set up the SIGCHLD handler in the daemon to use the
3923 code that specifies a non-restarting handler (typically sigaction() in
3924 modern systems) in an attempt to fix a rare and obscure crash bug.
3926 15. Narrowed the window for a race in the daemon that could cause it to ignore
3927 SIGCHLD signals. This is not a major problem, because they are used only to
3928 wake it up if nothing else does.
3930 16. A malformed maildirsize file could cause Exim to calculate negative values
3931 for the mailbox size or file count. Odd effects could occur as a result.
3932 The maildirsize information is now recalculated if the size or filecount
3935 17. Added HAVE_SYS_STATVFS_H to the os.h file for Linux, as it has had this
3936 support for a long time. Removed HAVE_SYS_VFS_H.
3938 18. Updated exipick to current release from John Jetmore.
3940 19. Allow an empty sender to be matched against a lookup in an address list.
3941 Previously the only cases considered were a regular expression, or an
3944 20. Exim went into a mad DNS lookup loop when doing a callout where the
3945 host was specified on the transport, if the DNS lookup yielded more than
3948 21. The RFC2047 encoding function was originally intended for short strings
3949 such as real names; it was not keeping to the 75-character limit for
3950 encoded words that the RFC imposes. It now respects the limit, and
3951 generates multiple encoded words if necessary. To be on the safe side, I
3952 have increased the buffer size for the ${rfc2047: expansion operator from
3955 22. Failure to deliver a bounce message always caused it to be frozen, even if
3956 there was an errors_to setting on the router. The errors_to setting is now
3959 23. If an IPv6 address is given for -bh or -bhc, it is now converted to the
3960 canonical form (fully expanded) before being placed in
3961 $sender_host_address.
3963 24. Updated eximstats to version 1.33
3965 25. Include certificate and key file names in error message when GnuTLS fails
3966 to set them up, because the GnuTLS error message doesn't include the name
3967 of the failing file when there is a problem reading it.
3969 26. Expand error message when OpenSSL has problems setting up cert/key files.
3972 27. Reset the locale to "C" after calling embedded Perl, in case it was changed
3973 (this can affect the format of dates).
3975 28. exim_tidydb, when checking for the continued existence of a message for
3976 which it has found a message-specific retry record, was not finding
3977 messages that were in split spool directories. Consequently, it was
3978 deleting retry records that should have stayed in existence.
3980 29. eximstats updated to version 1.35
3981 1.34 - allow eximstats to parse syslog lines as well as mainlog lines
3982 1.35 - bugfix such that pie charts by volume are generated correctly
3984 30. The SPA authentication driver was not abandoning authentication and moving
3985 on to the next authenticator when an expansion was forced to fail,
3986 contradicting the general specification for all authenticators. Instead it
3987 was generating a temporary error. It now behaves as specified.
3989 31. The default ordering of permitted cipher suites for GnuTLS was pessimal
3990 (the order specifies the preference for clients). The order is now AES256,
3991 AES128, 3DES, ARCFOUR128.
3993 31. Small patch to Sieve code - explicitly set From: when generating an
3996 32. Exim crashed if a remote delivery caused a very long error message to be
3997 recorded - for instance if somebody sent an entire SpamAssassin report back
3998 as a large number of 550 error lines. This bug was coincidentally fixed by
3999 increasing the size of one of Exim's internal buffers (big_buffer) that
4000 happened as part of the Exiscan merge. However, to be on the safe side, I
4001 have made the code more robust (and fixed the comments that describe what
4004 33. Some experimental protocols are using DNS PTR records for new purposes. The
4005 keys for these records are domain names, not reversed IP addresses. The
4006 dnsdb PTR lookup now tests whether its key is an IP address. If not, it
4007 leaves it alone. Component reversal etc. now happens only for IP addresses.
4010 34. The host_aton() function is supposed to be passed a string that is known
4011 to be a valid IP address. However, in the case of IPv6 addresses, it was
4012 not checking this. This is a hostage to fortune. Exim now panics and dies
4013 if the condition is not met. A case was found where this could be provoked
4014 from a dnsdb PTR lookup with an IPv6 address that had more than 8
4015 components; fortuitously, this particular loophole had already been fixed
4016 by change 4.50/55 or 4.44/33 above.
4018 If there are any other similar loopholes, the new check in host_aton()
4019 itself should stop them being exploited. The report I received stated that
4020 data on the command line could provoke the exploit when Exim was running as
4021 exim, but did not say which command line option was involved. All I could
4022 find was the use of -be with a bad dnsdb PTR lookup, and in that case it is
4023 running as the user.
4026 35. There was a buffer overflow vulnerability in the SPA authentication code
4027 (which came originally from the Samba project). I have added a test to the
4028 spa_base64_to_bits() function which I hope fixes it.
4031 36. The daemon start-up calls getloadavg() while still root for those OS that
4032 need the first call to be done as root, but it missed one case: when
4033 deliver_queue_load_max is set with deliver_drop_privilege. This is
4034 necessary for the benefit of the queue runner, because there is no re-exec
4035 when deliver_drop_privilege is set.
4037 37. Caching of lookup data for "hosts =" ACL conditions, when a named host list
4038 was in use, was not putting the data itself into the right store pool;
4039 consequently, it could be overwritten for a subsequent message in the same
4040 SMTP connection. (Fix 4.40/11 dealt with the non-cache case, but overlooked
4043 38. Sometimes the final signoff response after QUIT could fail to get
4044 transmitted in the non-TLS case. Testing !tls_active instead of tls_active
4045 < 0 before doing a fflush(). This bug looks as though it goes back to the
4046 introduction of TLS in release 3.20, but "sometimes" must have been rare
4047 because the tests only now provoked it.
4053 1. Fixed a longstanding but relatively impotent bug: a long time ago, before
4054 PIPELINING, the function smtp_write_command() used to return TRUE or FALSE.
4055 Now it returns an integer. A number of calls were still expecting a T/F
4056 return. Fortuitously, in all cases, the tests worked in OK situations,
4057 which is the norm. However, things would have gone wrong on any write
4058 failures on the smtp file descriptor. This function is used when sending
4059 messages over SMTP and also when doing verify callouts.
4061 2. When Exim is called to do synchronous delivery of a locally submitted
4062 message (the -odf or -odi options), it no longer closes stderr before doing
4065 3. Implemented the mua_wrapper option.
4067 4. Implemented mx_fail_domains and srv_fail_domains for the dnslookup router.
4069 5. Implemented the functions header_remove(), header_testname(),
4070 header_add_at_position(), and receive_remove_recipient(), and exported them
4073 6. If an ACL "warn" statement specified the addition of headers, Exim already
4074 inserted X-ACL-Warn: at the start if there was no header name. However, it
4075 was not making this test for the second and subsequent header lines if
4076 there were newlines in the string. This meant that an invalid header could
4077 be inserted if Exim was badly configured.
4079 7. Allow an ACL "warn" statement to add header lines at the start or after all
4080 the Received: headers, as well as at the end.
4082 8. Added the rcpt_4xx retry error code.
4084 9. Added postmaster_mailfrom=xxx to callout verification option.
4086 10. Added mailfrom=xxxx to the callout verification option, for verify=
4089 11. ${substr_1_:xxxx} and ${substr__3:xxxx} are now diagnosed as syntax errors
4090 (they previously behaved as ${substr_1_0:xxxx} and ${substr:_0_3:xxxx}).
4092 12. Inserted some casts to stop certain compilers warning when using pointer
4093 differences as field lengths or precisions in printf-type calls (mostly
4094 affecting debugging statements).
4096 13. Added optional readline() support for -be (dynamically loaded).
4098 14. Obscure bug fix: if a message error (e.g. 4xx to MAIL) happened within the
4099 same clock tick as a message's arrival, so that its received time was the
4100 same as the "first fail" time on the retry record, and that message
4101 remained on the queue past the ultimate address timeout, every queue runner
4102 would try a delivery (because it was past the ultimate address timeout) but
4103 after another failure, the ultimate address timeout, which should have then
4104 bounced the address, did not kick in. This was a "< instead of <=" error;
4105 in most cases the first failure would have been in the next clock tick
4106 after the received time, and all would be well.
4108 15. The special items beginning with @ in domain lists (e.g. @mx_any) were not
4109 being recognized when the domain list was tested by the match_domain
4110 condition in an expansion string.
4112 16. Added the ${str2b64: operator.
4114 17. Exim was always calling setrlimit() to set a large limit for the number of
4115 processes, without checking whether the existing limit was already
4116 adequate. (It did check for the limit on file descriptors.) Furthermore,
4117 errors from getrlimit() and setrlimit() were being ignored. Now they are
4118 logged to the main and panic logs, but Exim does carry on, to try to do its
4119 job under whatever limits there are.
4121 18. Imported PCRE 5.0.
4123 19. Trivial typo in log message " temporarily refused connection" (the leading
4126 20. If the log selector return_path_on_delivery was set and an address was
4127 redirected to /dev/null, the delivery process crashed because it assumed
4128 that a return path would always be set for a "successful" delivery. In this
4129 case, the whole delivery is bypassed as an optimization, and therefore no
4132 21. Internal re-arrangement: the function for sending a challenge and reading
4133 a response while authentication was assuming a zero-terminated challenge
4134 string. It's now changed to take a pointer and a length, to allow for
4135 binary data in such strings.
4137 22. Added the cyrus_sasl authenticator (code supplied by MBM).
4139 23. Exim was not respecting finduser_retries when seeking the login of the
4140 uid under which it was called; it was always trying 10 times. (The default
4141 setting of finduser_retries is zero.) Also, it was sleeping after the final
4142 failure, which is pointless.
4144 24. Implemented tls_on_connect_ports.
4146 25. Implemented acl_smtp_predata.
4148 26. If the domain in control=submission is set empty, Exim assumes that the
4149 authenticated id is a complete email address when it generates From: or
4150 Sender: header lines.
4152 27. Added "#define SOCKLEN_T int" to OS/os.h-SCO and OS/os.h-SCO_SV. Also added
4153 definitions to OS/Makefile-SCO and OS/Makefile-SCO_SV that put basename,
4154 chown and chgrp in /bin and hostname in /usr/bin.
4156 28. Exim was keeping the "process log" file open after each use, just as it
4157 does for the main log. This opens the possibility of it remaining open for
4158 long periods when the USR1 signal hits a daemon. Occasional processlog
4159 errors were reported, that could have been caused by this. Anyway, it seems
4160 much more sensible not to leave this file open at all, so that is what now
4163 29. The long-running daemon process does not normally write to the log once it
4164 has entered its main loop, and it closes the log before doing so. This is
4165 so that log files can straightforwardly be renamed and moved. However,
4166 there are a couple of unusual error situations where the daemon does write
4167 log entries, and I had neglected to close the log afterwards.
4169 30. The text of an SMTP error response that was received during a remote
4170 delivery was being truncated at 512 bytes. This is too short for some of
4171 the long messages that one sometimes sees. I've increased the limit to
4174 31. It is now possible to make retry rules that apply only when a message has a
4175 specific sender, in particular, an empty sender.
4177 32. Added "control = enforce_sync" and "control = no_enforce_sync". This makes
4178 it possible to be selective about when SMTP synchronization is enforced.
4180 33. Added "control = caseful_local_part" and "control = "caselower_local_part".
4182 32. Implemented hosts_connection_nolog.
4184 33. Added an ACL for QUIT.
4186 34. Setting "delay_warning=" to disable warnings was not working; it gave a
4189 35. Added mailbox_size and mailbox_filecount to appendfile.
4191 36. Added control = no_multiline_responses to ACLs.
4193 37. There was a bug in the logic of the code that waits for the clock to tick
4194 in the case where the clock went backwards by a substantial amount such
4195 that the microsecond fraction of "now" was more than the microsecond
4196 fraction of "then" (but the whole seconds number was less).
4198 38. Added support for the libradius Radius client library this is found on
4199 FreeBSD (previously only the radiusclient library was supported).
4205 1. When certain lookups returned multiple values in the form name=value, the
4206 quoting of the values was not always being done properly. Specifically:
4207 (a) If the value started with a double quote, but contained no whitespace,
4209 (b) If the value contained whitespace other than a space character (i.e.
4210 tabs or newlines or carriage returns) it was not quoted.
4211 This fix has been applied to the mysql and pgsql lookups by writing a
4212 separate quoting function and calling it from the lookup code. The fix
4213 should probably also be applied to nisplus, ibase and oracle lookups, but
4214 since I cannot test any of those, I have not disturbed their existing code.
4216 2. A hit in the callout cache for a specific address caused a log line with no
4217 reason for rejecting RCPT. Now it says "Previous (cached) callout
4218 verification failure".
4220 3. There was an off-by-one bug in the queryprogram router. An over-long
4221 return line was truncated at 256 instead of 255 characters, thereby
4222 overflowing its buffer with the terminating zero. As well as fixing this, I
4223 have increased the buffer size to 1024 (and made a note to document this).
4225 4. If an interrupt, such as the USR1 signal that is send by exiwhat, arrives
4226 when Exim is waiting for an SMTP response from a remote server, Exim
4227 restarts its select() call on the socket, thereby resetting its timeout.
4228 This is not a problem when such interrupts are rare. Somebody set up a cron
4229 job to run exiwhat every 2 minutes, which is less than the normal select()
4230 timeout (5 or 10 minutes). This meant that the select() timeout never
4231 kicked in because it was always reset. I have fixed this by comparing the
4232 time when an interrupt arrives with the time at the start of the first call
4233 to select(). If more time than the timeout has elapsed, the interrupt is
4234 treated as a timeout.
4236 5. Some internal re-factoring in preparation for the addition of Sieve
4237 extensions (by MH). In particular, the "personal" test is moved to a
4238 separate function, and given an option for scanning Cc: and Bcc: (which is
4239 not set for Exim filters).
4241 6. When Exim created an email address using the login of the caller as the
4242 local part (e.g. when creating a From: or Sender: header line), it was not
4243 quoting the local part when it contained special characters such as @.
4245 7. Installed new OpenBSD configuration files.
4247 8. Reworded some messages for syntax errors in "and" and "or" conditions to
4248 try to make them clearer.
4250 9. Callout options, other than the timeout value, were being ignored when
4251 verifying sender addresses in header lines. For example, when using
4253 verify = header_sender/callout=no_cache
4255 the cache was (incorrectly) being used.
4257 10. Added a missing instance of ${EXE} to the exim_install script; this affects
4258 only the Cygwin environment.
4260 11. When return_path_on_delivery was set as a log selector, if different remote
4261 addresses in the same message used different return paths and parallel
4262 remote delivery occurred, the wrong values would sometimes be logged.
4263 (Whenever a remote delivery process finished, the return path value from
4264 the most recently started remote delivery process was logged.)
4266 12. RFC 3848 specifies standard names for the "with" phrase in Received: header
4267 lines when AUTH and/or TLS are in use. This is the "received protocol"
4268 field. Exim used to use "asmtp" for authenticated SMTP, without any
4269 indication (in the protocol name) for TLS use. Now it follows the RFC and
4270 uses "esmtpa" if the connection is authenticated, "esmtps" if it is
4271 encrypted, and "esmtpsa" if it is both encrypted and authenticated. These
4272 names appear in log lines as well as in Received: header lines.
4274 13. Installed MH's patches for Sieve to add the "copy" and "vacation"
4275 extensions, and comparison tests, and to fix some bugs.
4277 14. Changes to the "personal" filter test:
4279 (1) The test was buggy in that it was just doing the equivalent of
4280 "contains" tests on header lines. For example, if a user's address was
4281 anne@some.where, the "personal" test would incorrectly be true for
4283 To: susanne@some.where
4285 This test is now done by extracting each address from the header in turn,
4286 and checking the entire address. Other tests that are part of "personal"
4287 are now done using regular expressions (for example, to check local parts
4288 of addresses in From: header lines).
4290 (2) The list of non-personal local parts in From: addresses has been
4291 extended to include "listserv", "majordomo", "*-request", and "owner-*",
4292 taken from the Sieve specification recommendations.
4294 (3) If the message contains any header line starting with "List-" it is
4295 treated as non-personal.
4297 (4) The test for "circular" in the Subject: header line has been removed
4298 because it now seems ill-conceived.
4300 15. Minor typos in src/EDITME comments corrected.
4302 16. Installed latest exipick from John Jetmore.
4304 17. If headers_add on a router specified a text string that was too long for
4305 string_sprintf() - that is, longer than 8192 bytes - Exim panicked. The use
4306 of string_sprintf() is now avoided.
4308 18. $message_body_size was not set (it was always zero) when running the DATA
4309 ACL and the local_scan() function.
4311 19. For the "mail" command in an Exim filter, no default was being set for
4312 the once_repeat time, causing a random time value to be used if "once" was
4313 specified. (If the value happened to be <= 0, no repeat happened.) The
4314 default is now 0s, meaning "never repeat". The "vacation" command was OK
4315 (its default is 7d). It's somewhat surprising nobody ever noticed this bug
4316 (I found it when inspecting the code).
4318 20. There is now an overall timeout for performing a callout verification. It
4319 defaults to 4 times the callout timeout, which applies to individual SMTP
4320 commands during the callout. The overall timeout applies when there is more
4321 than one host that can be tried. The timeout is checked before trying the
4322 next host. This prevents very long delays if there are a large number of
4323 hosts and all are timing out (e.g. when the network connections are timing
4324 out). The value of the overall timeout can be changed by specifying an
4325 additional sub-option for "callout", called "maxwait". For example:
4327 verify = sender/callout=5s,maxwait=20s
4329 21. Add O_APPEND to the open() call for maildirsize files (Exim already seeks
4330 to the end before writing, but this should make it even safer).
4332 22. Exim was forgetting that it had advertised PIPELINING for the second and
4333 subsequent messages on an SMTP connection. It was also not resetting its
4334 memory on STARTTLS and an internal HELO.
4336 23. When Exim logs an SMTP synchronization error within a session, it now
4337 records whether PIPELINING has been advertised or not.
4339 24. Added 3 instances of "(long int)" casts to time_t variables that were being
4340 formatted using %ld, because on OpenBSD (and perhaps others), time_t is int
4341 rather than long int.
4343 25. Installed the latest Cygwin configuration files from the Cygwin maintainer.
4345 26. Added the never_mail option to autoreply.
4351 1. A reorganization of the code in order to implement 4.40/8 caused a daemon
4352 crash if the getsockname() call failed; this can happen if a connection is
4353 closed very soon after it is established. The problem was simply in the
4354 order in which certain operations were done, causing Exim to try to write
4355 to the SMTP stream before it had set up the file descriptor. The bug has
4356 been fixed by making things happen in the correct order.
4362 1. If "drop" was used in a DATA ACL, the SMTP output buffer was not flushed
4363 before the connection was closed, thus losing the rejection response.
4365 2. Commented out the definition of SOCKLEN_T in os.h-SunOS5. It is needed for
4366 some early Solaris releases, but causes trouble in current releases where
4367 socklen_t is defined.
4369 3. When std{in,out,err} are closed, re-open them to /dev/null so that they
4372 4. Minor refactoring of os.c-Linux to avoid compiler warning when IPv6 is not
4375 5. Refactoring in expand.c to improve memory usage. Pre-allocate a block so
4376 that releasing the top of it at the end releases what was used for sub-
4377 expansions (unless the block got too big). However, discard this block if
4378 the first thing is a variable or header, so that we can use its block when
4379 it is dynamic (useful for very large $message_headers, for example).
4381 6. Lookups now cache *every* query, not just the most recent. A new, separate
4382 store pool is used for this. It can be recovered when all lookup caches are
4383 flushed. Lookups now release memory at the end of their result strings.
4384 This has involved some general refactoring of the lookup sources.
4386 7. Some code has been added to the store_xxx() functions to reduce the amount
4387 of flapping under certain conditions.
4389 8. log_incoming_interface used to affect only the <= reception log lines. Now
4390 it causes the local interface and port to be added to several more SMTP log
4391 lines, for example "SMTP connection from", and rejection lines.
4393 9. The Sieve author supplied some patches for the doc/README.SIEVE file.
4395 10. Added a conditional definition of _BSD_SOCKLEN_T to os.h-Darwin.
4397 11. If $host_data was set by virtue of a hosts lookup in an ACL, its value
4398 could be overwritten at the end of the current message (or the start of a
4399 new message if it was set in a HELO ACL). The value is now preserved for
4400 the duration of the SMTP connection.
4402 12. If a transport had a headers_rewrite setting, and a matching header line
4403 contained an unqualified address, that address was qualified, even if it
4404 did not match any rewriting rules. The underlying bug was that the values
4405 of the flags that permit the existence of unqualified sender and recipient
4406 addresses in header lines (set by {sender,recipient}_unqualified_hosts for
4407 non-local messages, and by -bnq for local messages) were not being
4408 preserved with the message after it was received.
4410 13. When Exim was logging an SMTP synchronization error, it could sometimes log
4411 "next input=" as part of the text comprising the host identity instead of
4412 the correct text. The code was using the same buffer for two different
4413 strings. However, depending on which order the printing function evaluated
4414 its arguments, the bug did not always show up. Under Linux, for example, my
4415 test suite worked just fine.
4417 14. Exigrep contained a use of Perl's "our" scoping after change 4.31/70. This
4418 doesn't work with some older versions of Perl. It has been changed to "my",
4419 which in any case is probably the better facility to use.
4421 15. A really picky compiler found some instances of statements for creating
4422 error messages that either had too many or two few arguments for the format
4425 16. The size of the buffer for calls to the DNS resolver has been increased
4426 from 1024 to 2048. A larger buffer is needed when performing PTR lookups
4427 for addresses that have a lot of PTR records. This alleviates a problem; it
4428 does not fully solve it.
4430 17. A dnsdb lookup for PTR records that receives more data than will fit in the
4431 buffer now truncates the list and logs the incident, which is the same
4432 action as happens when Exim is looking up a host name and its aliases.
4433 Previously in this situation something unpredictable would happen;
4434 sometimes it was "internal error: store_reset failed".
4436 18. If a server dropped the connection unexpectedly when an Exim client was
4437 using GnuTLS and trying to read a response, the client delivery process
4438 crashed while trying to generate an error log message.
4440 19. If a "warn" verb in an ACL added multiple headers to a message in a single
4441 string, for example:
4443 warn message = H1: something\nH2: something
4445 the text was added as a single header line from Exim's point of view
4446 though it ended up OK in the delivered message. However, searching for the
4447 second and subsequent header lines using $h_h2: did not work. This has been
4448 fixed. Similarly, if a system filter added multiple headers in this way,
4449 the routers could not see them.
4451 20. Expanded the error message when iplsearch is called with an invalid key to
4452 suggest using net-iplsearch in a host list.
4454 21. When running tests using -bh, any delays imposed by "delay" modifiers in
4455 ACLs are no longer actually imposed (and a message to that effect is
4458 22. If a "gecos" field in a passwd entry contained escaped characters, in
4459 particular, if it contained a \" sequence, Exim got it wrong when building
4460 a From: or a Sender: header from that name. A second bug also caused
4461 incorrect handling when an unquoted " was present following a character
4462 that needed quoting.
4464 23. "{crypt}" as a password encryption mechanism for a "crypteq" expansion item
4465 was not being matched caselessly.
4467 24. Arranged for all hyphens in the exim.8 source to be escaped with
4470 25. Change 16 of 4.32, which reversed 71 or 4.31 didn't quite do the job
4471 properly. Recipient callout cache records were still being keyed to include
4472 the sender, even when use_sender was set false. This led to far more
4473 callouts that were necessary. The sender is no longer included in the key
4474 when use_sender is false.
4476 26. Added "control = submission" modifier to ACLs.
4478 27. Added the ${base62d: operator to decode base 62 numbers.
4480 28. dnsdb lookups can now access SRV records.
4482 29. CONFIGURE_OWNER can be set at build time to define an alternative owner for
4483 the configuration file.
4485 30. The debug message "delivering xxxxxx-xxxxxx-xx" is now output in verbose
4486 (-v) mode. This makes the output for a verbose queue run more intelligible.
4488 31. Added a use_postmaster feature to recipient callouts.
4490 32. Added the $body_zerocount variable, containing the number of binary zero
4491 bytes in the message body.
4493 33. The time of last modification of the "new" subdirectory is now used as the
4494 "mailbox time last read" when there is a quota error for a maildir
4497 34. Added string comparison operators lt, lti, le, lei, gt, gti, ge, gei.
4499 35. Added +ignore_unknown as a special item in host lists.
4501 36. Code for decoding IPv6 addresses in host lists is now included, even if
4502 IPv6 support is not being compiled. This fixes a bug in which an IPv6
4503 address was recognized as an IP address, but was then not correctly decoded
4504 into binary, causing unexpected and incorrect effects when compared with
4511 1. Very minor rewording of debugging text in manualroute to say "list of
4512 hosts" instead of "hostlist".
4514 2. If verify=header_syntax was set, and a header line with an unqualified
4515 address (no domain) and a large number of spaces between the end of the
4516 name and the colon was received, the reception process suffered a buffer
4517 overflow, and (when I tested it) crashed. This was caused by some obsolete
4518 code that should have been removed. The fix is to remove it!
4520 3. When running in the test harness, delay a bit after writing a bounce
4521 message to get a bit more predictability in the log output.
4523 4. Added a call to search_tidyup() just before forking a reception process. In
4524 theory, someone could use a lookup in the expansion of smtp_accept_max_
4525 per_host which, without the tidyup, could leave open a database connection.
4527 5. Added the variables $recipient_data and $sender_data which get set from a
4528 lookup success in an ACL "recipients" or "senders" condition, or a router
4529 "senders" option, similar to $domain_data and $local_part_data.
4531 6. Moved the writing of debug_print from before to after the "senders" test
4534 7. Change 4.31/66 (moving the time when the Received: is generated) caused
4535 problems for message scanning, either using a data ACL, or using
4536 local_scan() because the Received: header was not generated till after they
4537 were called (in order to set the time as the time of reception completion).
4538 I have revised the way this works. The header is now generated after the
4539 body is received, but before the ACL or local_scan() are called. After they
4540 are run, the timestamp in the header is updated.
4546 1. Change 4.24/6 introduced a bug because the SIGALRM handler was disabled
4547 before starting a queue runner without re-exec. This happened only when
4548 deliver_drop_privilege was set or when the Exim user was set to root. The
4549 effect of the bug was that timeouts during subsequent deliveries caused
4550 crashes instead of being properly handled. The handler is now left at its
4551 default (and expected) setting.
4553 2. The other case in which a daemon avoids a re-exec is to deliver an incoming
4554 message, again when deliver_drop_privilege is set or Exim is run as root.
4555 The bug described in (1) was not present in this case, but the tidying up
4556 of the other signals was missing. I have made the two cases consistent.
4558 3. The ignore_target_hosts setting on a manualroute router was being ignored
4559 for hosts that were looked up using the /MX notation.
4561 4. Added /ignore=<ip list> feature to @mx_any, @mx_primary, and @mx_secondary
4564 5. Change 4.31/55 was buggy, and broke when there was a rewriting rule that
4565 operated on the sender address. After changing the $sender_address to <>
4566 for the sender address verify, Exim was re-instated it as the original
4567 (before rewriting) address, but remembering that it had rewritten it, so it
4568 wasn't rewriting it again. This bug also had the effect of breaking the
4569 sender address verification caching when the sender address was rewritten.
4571 6. The ignore_target_hosts option was being ignored by the ipliteral router.
4572 This has been changed so that if the ip literal address matches
4573 ignore_target_hosts, the router declines.
4575 7. Added expansion conditions match_domain, match_address, and match_local_
4576 part (NOT match_host).
4578 8. The placeholder for the Received: header didn't have a length field set.
4580 9. Added code to Exim itself and to exim_lock to test for a specific race
4581 condition that could lead to file corruption when using MBX delivery. The
4582 issue is with the lockfile that is created in /tmp. If this file is removed
4583 after a process has opened it but before that process has acquired a lock,
4584 there is the potential for a second process to recreate the file and also
4585 acquire a lock. This could lead to two Exim processes writing to the file
4586 at the same time. The added code performs the same test as UW imapd; it
4587 checks after acquiring the lock that its file descriptor still refers to
4588 the same named file.
4590 10. The buffer for building added header lines was of fixed size, 8192 bytes.
4591 It is now parameterized by HEADER_ADD_BUFFER_SIZE and this can be adjusted
4594 11. Added the smtp_active_hostname option. If used, this will typically be made
4595 to depend on the incoming interface address. Because $interface_address is
4596 not set up until the daemon has forked a reception process, error responses
4597 that can happen earlier (such as "too many connections") no longer contain
4600 12. If an expansion in a condition on a "warn" statement fails because a lookup
4601 defers, the "warn" statement is abandoned, and the next ACL statement is
4602 processed. Previously this caused the whole ACL to be aborted.
4604 13. Added the iplsearch lookup type.
4606 14. Added ident_timeout as a log selector.
4608 15. Added tls_certificate_verified as a log selector.
4610 16. Added a global option tls_require_ciphers (compare the smtp transport
4611 option of the same name). This controls incoming TLS connections.
4613 17. I finally figured out how to make tls_require_ciphers do a similar thing
4614 in GNUtls to what it does in OpenSSL, that is, set up an appropriate list
4615 before starting the TLS session.
4617 18. Tabs are now shown as \t in -bP output.
4619 19. If the log selector return_path_on_delivery was set, Exim crashed when
4620 bouncing a message because it had too many Received: header lines.
4622 20. If two routers both had headers_remove settings, and the first one included
4623 a superfluous trailing colon, the final name in the first list and the
4624 first name in the second list were incorrectly joined into one item (with a
4625 colon in the middle).
4631 1. Added -C and -D options to the exinext utility, mainly to make it easier
4632 to include in the automated testing, but these could be helpful when
4633 multiple configurations are in use.
4635 2. The exinext utility was not formatting the output nicely when there was
4636 an alternate port involved in the retry record key, nor when there was a
4637 message id as well (for retries that were specific to a specific message
4638 and a specific host). It was also confused by IPv6 addresses, because of
4639 the additional colons they contain. I have fixed the IPv4 problem, and
4640 patched it up to do a reasonable job for IPv6.
4642 3. When there is an error after a MAIL, RCPT, or DATA SMTP command during
4643 delivery, the log line now contains "pipelined" if PIPELINING was used.
4645 4. An SMTP transport process used to panic and die if the bind() call to set
4646 an explicit outgoing interface failed. This has been changed; it is now
4647 treated in the same way as a connect() failure.
4649 5. A reference to $sender_host_name in the part of a conditional expansion
4650 that was being skipped was still causing a DNS lookup. This no longer
4653 6. The def: expansion condition was not recognizing references to header lines
4654 that used bh_ and bheader_.
4656 7. Added the _cache feature to named lists.
4658 8. The code for checking quota_filecount in the appendfile transport was
4659 allowing one more file than it should have been.
4661 9. For compatibility with Sendmail, the command line option
4669 and sets the incoming protocol and host name (for trusted callers). The
4670 host name and its colon can be omitted when only the protocol is to be set.
4671 Note the Exim already has two private options, -pd and -ps, that refer to
4672 embedded Perl. It is therefore impossible to set a protocol value of "d" or
4673 "s", but I don't think that's a major issue.
4675 10. A number of refactoring changes to the code, none of which should affect
4678 (a) The number of logging options was getting close to filling up the
4679 32-bit word that was used as a bit map. I have split them into two classes:
4680 those that are passed in the argument to log_write(), and those that are
4681 only ever tested independently outside of that function. These are now in
4682 separate 32-bit words, so there is plenty of room for expansion again.
4683 There is no change in the user interface or the logging behaviour.
4685 (b) When building, for example, log lines, the code previously used a
4686 macro that called string_cat() twice, in order to add two strings. This is
4687 not really sufficiently general. Furthermore, there was one instance where
4688 it was actually wrong because one of the argument was used twice, and in
4689 one call a function was used. (As it happened, calling the function twice
4690 did not affect the overall behaviour.) The macro has been replaced by a
4691 function that can join an arbitrary number of extra strings onto a growing
4694 (c) The code for expansion conditions now uses a table and a binary chop
4695 instead of a serial search (which was left over from when there were very
4696 few conditions). Also, it now recognizes conditions like "pam" even when
4697 the relevant support is not compiled in: a suitably worded error message is
4698 given if an attempt is made to use such a condition.
4700 11. Added ${time_interval:xxxxx}.
4702 12. A bug was causing one of the ddress fields not to be passed back correctly
4703 from remote delivery subprocesses. The field in question was not being
4704 subsequently used, so this caused to problems in practice.
4706 13. Added new log selectors queue_time and deliver_time.
4708 14. Might have fixed a bug in maildirsizefile handling that threw up
4709 "unexpected character" debug warnings, and recalculated the data
4710 unnecessarily. In any case, I expanded the warning message to give more
4713 15. Added the message "Restricted characters in address" to the statements in
4714 the default ACL that block characters like @ and % in local parts.
4716 16. Change 71 for release 4.31 proved to be much less benign that I imagined.
4717 Three changes have been made:
4719 (a) There was a serious bug; a negative response to MAIL caused the whole
4720 recipient domain to be cached as invalid, thereby blocking all messages
4721 to all local parts at the same domain, from all senders. This bug has
4722 been fixed. The domain is no longer cached after a negative response to
4723 MAIL if the sender used is not empty.
4725 (b) The default behaviour of using MAIL FROM:<> for recipient callouts has
4728 (c) A new callout option, "use_sender" has been added for people who want
4729 the modified behaviour.
4735 1. Removed "EXTRALIBS=-lwrap" from OS/Makefile-Unixware7 on the advice of
4738 2. Removed "LIBS = -lresolv" from OS/Makefile-Darwin as it is not needed, and
4739 indeed breaks things for older releases.
4741 3. Added additional logging to the case where there is a problem reading data
4742 from a filter that is running in a subprocess using a pipe, in order to
4743 try to track down a specific problem.
4745 4. Testing facility fudge: when running in the test harness and attempting
4746 to connect to 10.x.x.x (expecting a connection timeout) I'm now sometimes
4747 getting "No route to host". Convert this to a timeout.
4749 5. Define ICONV_ARG2_TYPE as "char **" for Unixware7 to avoid compiler
4752 6. Some OS don't have socklen_t but use size_t instead. This affects the
4753 fifth argument of getsockopt() amongst other things. This is now
4754 configurable by a macro called SOCKLEN_T which defaults to socklen_t, but
4755 can be set for individual OS. I have set it for SunOS5, OSF1, and
4756 Unixware7. Current versions of SunOS5 (aka Solaris) do have socklen_t, but
4757 some earlier ones do not.
4759 7. Change 4.30/15 was not doing the test caselessly.
4761 8. The standard form for an IPv6 address literal was being rejected by address
4762 parsing in, for example, MAIL and RCPT commands. An example of this kind of
4763 address is [IPv6:2002:c1ed:8229:10:202:2dff:fe07:a42a]. Exim now accepts
4764 this, as well as the form without the "IPv6" on the front (but only when
4765 address literals are enabled, of course).
4767 9. Added some casts to avoid compiler warnings in OS/os.c-Linux.
4769 10. Exim crashed if a message with an empty sender address specified by -f
4770 encountered a router with an errors_to setting. This could be provoked only
4771 by a command such as
4775 where an empty string was supplied; "<>" did not hit this bug.
4777 11. Installed PCRE release 4.5.
4779 12. If EHLO/HELO was rejected by an ACL, the value of $sender_helo_name
4780 remained set. It is now erased.
4782 13. exiqgrep wasn't working on MacOS X because it didn't correctly compute
4783 times from message ids (which are base 36 rather than the normal 62).
4785 14. "Expected" SMTP protocol errors that can arise when PIPELINING is in use
4786 were being counted as actual protocol errors, and logged if the log
4787 selector +smtp_protocol_error was set. One cannot be perfect in this test,
4788 but now, if PIPELINING has been advertised, RCPT following a rejected MAIL,
4789 and DATA following a set of rejected RCPTs do not count as protocol errors.
4790 In other words, Exim assumes they were pipelined, though this may not
4791 actually be the case. Of course, in all cases the client gets an
4792 appropriate error code.
4794 15. If a lookup fails in an ACL condition, a message about the failure may
4795 be available; it is used if testing the ACL cannot continue, because most
4796 such messages specify what the cause of the deferral is. However, some
4797 messages (e.g. "MYSQL: no data found") do not cause a defer. There was bug
4798 that caused an old message to be retained and used if a later statement
4799 caused a defer, replacing the real cause of the deferral.
4801 16. If an IP address had so many PTR records that the DNS lookup buffer
4802 was not large enough to hold them, Exim could crash while trying to process
4803 the truncated data. It now detects and logs this case.
4805 17. Further to 4.21/58, another change has been made: if (and only if) the
4806 first line of a message (the first header line) ends with CRLF, a bare LF
4807 in a subsequent header line has a space inserted after it, so as not to
4808 terminate the header.
4810 18. Refactoring: tidied an ugly bit of code in appendfile that copied data
4811 unnecessarily, used atoi() instead of strtol(), and didn't check the
4812 termination when getting file sizes from file names by regex.
4814 19. Completely re-implemented the support for maildirsize files, in the light
4815 of a number of problems with the previous contributed implementation
4816 (4.30/29). In particular:
4818 . If the quota is zero, the maildirsize file is maintained, but no quota is
4821 . If the maildir directory does not exist, it is created before any attempt
4822 to write a maildirsize file.
4824 . The quota value in the file is just a cache; if the quota is changed in
4825 the transport, the new value overrides.
4827 . A regular expression is available for excluding directories from the
4830 20. The autoreply transport checks the characters in options that define the
4831 message's headers; it allows continued headers, but it was checking with
4832 isspace() after an embedded newline instead of explicitly looking for a
4835 21. If all the "regular" hosts to which an address was routed had passed their
4836 expiry times, and had not reached their retry times, the address was
4837 bounced, even if fallback hosts were defined. Now Exim should go on to try
4840 22. Increased buffer sizes in the callout code from 1024 to 4096 to match the
4841 equivalent code in the SMTP transport. Some hosts send humungous responses
4842 to HELO/EHLO, more than 1024 it seems.
4844 23. Refactoring: code in filter.c used (void *) for "any old type" but this
4845 gives compiler warnings in some environments. I've now done it "properly",
4848 24. The replacement for inet_ntoa() that is used with gcc on IRIX systems
4849 (because of problems with the built-in one) was declared to return uschar *
4850 instead of char *, causing compiler failure.
4852 25. Fixed a file descriptor leak when processing alias/forward files.
4854 26. Fixed a minor format string issue in dbfn.c.
4856 27. Typo in exim.c: ("dmbnz" for "dbmnz").
4858 28. If a filter file refered to $h_xxx or $message_headers, and the headers
4859 contained RFC 2047 "words", Exim's memory could, under certain conditions,
4862 29. When a sender address is verified, it is cached, to save repeating the test
4863 when there is more than one recipient in a message. However, when the
4864 verification involves a callout, it is possible for different callout
4865 options to be set for different recipients. It is too complicated to keep
4866 track of this in the cache, so now Exim always runs a verification when a
4867 callout is required, relying on the callout cache for the optimization.
4868 The overhead is duplication of the address routing, but this should not be
4871 30. Fixed a bug in callout caching. If a RCPT command caused the sender address
4872 to be verified with callout=postmaster, and the main callout worked but the
4873 postmaster check failed, the verification correctly failed. However, if a
4874 subsequent RCPT command asked for sender verification *without* the
4875 postmaster check, incorrect caching caused this verification also to fail,
4878 31. Exim caches DNS lookup failures so as to avoid multiple timeouts; however,
4879 it was not caching the DNS options (qualify_single, search_parents) that
4880 were used when the lookup failed. A subsequent lookup with different
4881 options therefore always gave the same answer, though there were cases
4882 where it should not have. (Example: a "domains = !$mx_any" option on a
4883 dnslookup router: the "domains" option is always processed without any
4884 widening, but the router might have qualify_single set.) Now Exim uses the
4885 cached value only when the same options are set.
4887 32. Added John Jetmore's "exipick" utility to the distribution.
4889 33. GnuTLS: When an attempt to start a TLS session fails for any reason other
4890 than a timeout (e.g. a certificate is required, and is not provided), an
4891 Exim server now closes the connection immediately. Previously it waited for
4892 the client to close - but if the client is SSL, it seems that they each
4893 wait for each other, leading to a delay before one of them times out.
4895 34: GnuTLS: Updated the code to use the new GnuTLS 1.0.0 API. I have not
4896 maintained 0.8.x compatibility because I don't think many are using it, and
4897 it is clearly obsolete.
4899 35. Added TLS support for CRLs: a tls_crl global option and one for the smtp
4902 36. OpenSSL: $tls_certificate_verified was being set to 1 even if the
4903 client certificate was expired. A simple patch fixes this, though I don't
4904 understand the full logic of why the verify callback is called multiple
4907 37. OpenSSL: a patch from Robert Roselius: "Enable client-bug workaround.
4908 Versions of OpenSSL as of 0.9.6d include a 'CBC countermeasure' feature,
4909 which causes problems with some clients (such as the Certicom SSL Plus
4910 library used by Eudora). This option, SSL_OP_DONT_INSERT_EMPTY_FRAGMENTS,
4911 disables the coutermeasure allowing Eudora to connect."
4913 38. Exim was not checking that a write() to a log file succeeded. This could
4914 lead to Bad Things if a log got too big, in particular if it hit a file
4915 size limit. Exim now panics and dies if it cannot write to a log file, just
4916 as it does if it cannot open a log file.
4918 39. Modified OS/Makefile-Linux so that it now contains
4920 CFLAGS=-O -D_FILE_OFFSET_BITS=64 -D_LARGEFILE_SOURCE
4922 The two -D definitions ensure that Exim is compiled with large file
4923 support, which makes it possible to handle log files that are bigger than
4926 40. Fixed a subtle caching bug: if (in an ACL or a set of routers, for
4927 instance) a domain was checked against a named list that involved a lookup,
4928 causing $domain_data to be set, then another domain was checked against the
4929 same list, then the first domain was re-checked, the value of $domain_data
4930 after the final check could be wrong. In particular, if the second check
4931 failed, it could be set empty. This bug probably also applied to
4934 41. The strip_trailing_dot option was not being applied to the address given
4935 with the -f command-line option.
4937 42. The code for reading a message's header from the spool was incrementing
4938 $received_count, but never initializing it. This meant that the value was
4939 incorrect (doubled) while delivering a message in the same process in which
4940 it was received. In the most common configuration of Exim, this never
4941 happens - a fresh exec is done - but it can happen when
4942 deliver_drop_privilege is set.
4944 43. When Exim logs an SMTP synchronization error - client data sent too soon -
4945 it now includes up to 150 characters of the unexpected data in the log
4948 44. The exim_dbmbuild utility uses fixed size buffers for reading input lines
4949 and building data strings. The size of both of these buffers was 10 000
4950 bytes - far larger than anybody would *ever* want, thought I. Needless to
4951 say, somebody hit the limit. I have increased the maximum line length to
4952 20 000 and the maximum data length of concatenated lines to 100 000. I have
4953 also fixed two bugs, because there was no checking on these buffers. Tsk,
4954 tsk. Now exim_dbmbuild gives a message and exits with an error code if a
4955 buffer is too small.
4957 45. The exim_dbmbuild utility did not support quoted keys, as Exim does in
4958 lsearch lookups. Now it does.
4960 46. When parsing a route_list item in a manualroute router, a fixed-length
4961 buffer was used for the list of hosts. I made this 1024 bytes long,
4962 thinking that nobody would ever have a list of hosts that long. Wrong.
4963 Somebody had a whole pile of complicated expansion conditions, and the
4964 string was silently truncated, leading to an expansion error. It turns out
4965 that it is easier to change to an unlimited length (owing to other changes
4966 that have happened since this code was originally written) than to build
4967 structure for giving a limitation error. The length of the item that
4968 expands into the list of hosts is now unlimited.
4970 47. The lsearch lookup could not handle data where the length of text line was
4971 more than 4095 characters. Such lines were truncated, leading to shortened
4972 data being returned. It should now handle lines of any length.
4974 48. Minor wording revision: "cannot test xxx in yyy ACL" becomes "cannot test
4975 xxx condition in yyy ACL" (e.g. "cannot test domains condition in DATA
4978 49. Cosmetic tidy to scripts like exicyclog that are generated by globally
4979 replacing strings such as BIN_DIRECTORY in a source file: the replacement
4980 no longer happens in comment lines. A list of replacements is now placed
4981 at the head of all of the source files, except those whose only change is
4982 to replace PERL_COMMAND in the very first #! line.
4984 50. Replaced the slow insertion sort in queue.c, for sorting the list of
4985 messages on the queue, with a bottom-up merge sort, using code contributed
4986 by Michael Haardt. This should make operations like -bp somewhat faster on
4987 large queues. It won't affect queue runners, except when queue_run_in_order
4990 51. Installed eximstats 1.31 in the distribution.
4992 52. Added support for SRV lookups to the dnslookup router.
4994 53. If an ACL referred to $message_body or $message_body_end, the value was not
4995 reset for any messages that followed in the same SMTP session.
4997 54. The store-handling optimization for building very long strings was not
4998 differentiating between the different store pools. I don't think this
4999 actually made any difference in practice, but I've tidied it.
5001 55. While running the routers to verify a sender address, $sender_address
5002 was still set to the sender address. This is wrong, because when routing to
5003 send a bounce to the sender, it would be empty. Therefore, I have changed
5004 it so that, while verifying a sender address, $sender_address is set to <>.
5005 (There is no change to what happens when verifying a recipient address.)
5007 56. After finding MX (or SRV) records, Exim was doing a DNS lookup for the
5008 target A or AAAA records (if not already returned) without resetting the
5009 qualify_single or search_parents options of the DNS resolver. These are
5010 inappropriate in this case because the targets of MX and SRV records must
5011 be FQDNs. A broken DNS record could cause trouble if it happened to have a
5012 target that, when qualified, matched something in the local domain. These
5013 two options are now turned off when doing these lookups.
5015 57. It seems that at least some releases of Reiserfs (which does not have the
5016 concept of a fixed number of inodes) returns zero and not -1 for the
5017 number of available inodes. This interacted badly with check_spool_inodes,
5018 which assumed that -1 was the "no such thing" setting. What I have done is
5019 to check that the total number of inodes is greater than zero before doing
5020 the test of how many are available.
5022 58. When a "warn" ACL statement has a log_message modifier, the message is
5023 remembered, and not repeated. This is to avoid a lot of repetition when a
5024 message has many recipients that cause the same warning to be written.
5025 Howewer, Exim was preserving the list of already written lines for an
5026 entire SMTP session, which doesn't seem right. The memory is now reset if a
5027 new message is started.
5029 59. The "rewrite" debugging flag was not showing the result of rewriting in the
5030 debugging output unless log_rewrite was also set.
5032 60. Avoid a compiler warning on 64-bit systems in dsearch.c by avoiding the use
5033 of (int)(handle) when we know that handle contains (void *)(-1).
5035 61. The Exim daemon panic-logs an error return when it closes the incoming
5036 connection. However "connection reset by peer" seems to be common, and
5037 isn't really an error worthy of noting specially, so that particular error
5040 62. When Exim is trying to find all the local interfaces, it used to panic and
5041 die if the ioctl to get the interface flags failed. However, it seems that
5042 on at least one OS (Solaris 9) it is possible to have an interface that is
5043 included in the list of interfaces, but for which you get a failure error
5044 for this call. This happens when the interface is not "plumbed" into a
5045 protocol (i.e. neither IPv4 nor IPv6). I've changed the code so that a
5046 failure of the "get flags" call assumes that the interface is down.
5048 63. Added a ${eval10: operator, which assumes all numbers are decimal. This
5049 makes life easier for people who are doing arithmetic on fields extracted
5050 from dates, where you often get leading zeros that should not be
5051 interpreted as octal.
5053 64. Added qualify_domain to the redirect router, to override the global
5056 65. If a pathologically long header line contained very many addresses (the
5057 report of this problem mentioned 10 000) and each of them was rewritten,
5058 Exim could use up a very large amount of memory. (It kept on making new
5059 copies of the header line as it rewrote, and never released the old ones.)
5060 At the expense of a bit more processing, the header rewriting function has
5061 been changed so that it no longer eats memory in this way.
5063 66. The generation of the Received: header has been moved from the time that a
5064 message starts to be received, to the time that it finishes. The timestamp
5065 in the Received: header should now be very close to that of the <= log
5066 line. There are two side-effects of this change:
5068 (a) If a message is rejected by a DATA or non-SMTP ACL or local_scan(), the
5069 logged header lines no longer include the local Received: line, because
5070 it has not yet been created. The same applies to a copy of the message
5071 that is returned to a non-SMTP sender when a message is rejected.
5073 (b) When a filter file is tested using -bf, no additional Received: header
5074 is added to the test message. After some thought, I decided that this
5077 This change does not affect the value of $received_for. It is still set
5078 after address rewriting, but before local_scan() is called.
5080 67. Installed the latest Cygwin-specific files from the Cygwin maintainer.
5082 68. GnuTLS: If an empty file is specified for tls_verify_certificates, GnuTLS
5083 gave an unhelpful panic error message, and a defer error. I have managed to
5084 change this behaviour so that it now rejects any supplied certificate,
5085 which seems right, as the list of acceptable certificates is empty.
5087 69. OpenSSL: If an empty file is specified for tls_verify_certificates, OpenSSL
5088 gave an unhelpful defer error. I have not managed to make this reject any
5089 supplied certificates, but the error message it gives is "no certificate
5090 supplied", which is not helpful.
5092 70. exigrep's output now also includes lines that are not associated with any
5093 message, but which match the given pattern. Implemented by a patch from
5094 Martin Sluka, which also tidied up the Perl a bit.
5096 71. Recipient callout verification, like sender verification, was using <> in
5097 the MAIL FROM command. This isn't really the right thing, since the actual
5098 sender may affect whether the remote host accepts the recipient or not. I
5099 have changed it to use the actual sender in the callout; this means that
5100 the cache record is now keyed on a recipient/sender pair, not just the
5101 recipient address. There doesn't seem to be a real danger of callout loops,
5102 since a callout by the remote host to check the sender would use <>.
5103 [SEE ABOVE: changed after hitting problems.]
5105 72. Exim treats illegal SMTP error codes that do not begin with 4 or 5 as
5106 temporary errors. However, in the case of such a code being given after
5107 the end of a data transmission (i.e. after ".") Exim was failing to write
5108 a retry record for the message. (Yes, there was some broken host that was
5109 actually sending 8xx at this point.)
5111 73. An unknown lookup type in a host list could cause Exim to panic-die when
5112 the list was checked. (An example that provoked this was putting <; in the
5113 middle of a list instead of at the start.) If this happened during a DATA
5114 ACL check, a -D file could be left lying around. This kind of configuration
5115 error no longer causes Exim to die; instead it causes a defer errror. The
5116 incident is still logged to the main and panic logs.
5118 74. Buglet left over from Exim 3 conversion. The message "too many messages
5119 in one connection" was written to the rejectlog but not the mainlog, except
5120 when address rewriting (yes!) was being logged.
5122 75. Added write_rejectlog option.
5124 76. When a system filter was run not as root (that is, when system_filter_user
5125 was set), the values of the $n variables were not being returned to the
5126 main process; thus, they were not subsequently available in the $sn
5129 77. Added +return_path_on_delivery log selector.
5131 78. A connection timeout was being treated differently from recipients deferred
5132 when testing hosts_max_try with a message that was older than the host's
5133 retry timeout. (The host should not be counted, thus allowing all hosts to
5134 be tried at least once before bouncing.) This may have been the cause of an
5135 occasionally reported bug whereby a message would remain on the queue
5136 longer than the retry timeout, but would be bounced if a delivery was
5137 forced. I say "may" because I never totally pinned down the problem;
5138 setting up timeout/retry tests is difficult. See also the next item.
5140 79. The ultimate address timeout was not being applied to errors that involved
5141 a combination of host plus message (for example, a timeout on a MAIL
5142 command). When an address resolved to a number of possible hosts, and they
5143 were not all tried for each delivery (e.g. because of hosts_max_try), a
5144 message could remain on the queue longer than the retry timeout.
5146 80. Sieve bug: "stop" inside "elsif" was broken. Applied a patch from Michael
5149 81. Fixed an obscure SMTP outgoing bug which required at least the following
5150 conditions: (a) there was another message waiting for the same server;
5151 (b) the server returned 5xx to all RCPT commands in the first message so
5152 that the message was not completed; (c) the server dropped the connection
5153 or gave a negative response to the RSET that Exim sends to abort the
5154 transaction. The observed case was a dropped connection after DATA that had
5155 been sent in pipelining mode. That is, the server had advertised PIPELINING
5156 but was not implementing it correctly. The effect of the bug was incorrect
5157 behaviour, such as trying another host, and this could lead to a crash.
5163 1. The 3rd arguments to getsockname(), getpeername(), and accept() in exim.c
5164 and daemon.c were passed as pointers to ints; they should have been
5165 pointers to socklen_t variables (which are typically unsigned ints).
5167 2. Some signed/unsigned type warnings in the os.c file for Linux have been
5170 3. Fixed a really odd bug that affected only the testing scheme; patching a
5171 certain fixed string in the binary changed the value of another string that
5172 happened to be identical to the end of the original first string.
5174 4. When gethostbyname() (or equivalent) is passed an IP address as a "host
5175 name", it returns that address as the IP address. On some operating
5176 systems (e.g. Solaris), it also passes back the IP address string as the
5177 "host name". However, on others (e.g. Linux), it passes back an empty
5178 string. Exim wasn't checking for this, and was changing the host name to an
5179 empty string, assuming it had been canonicized.
5181 5. Although rare, it is permitted to have more than one PTR record for a given
5182 IP address. I thought that gethostbyaddr() or getipnodebyaddr() always gave
5183 all the names associated with an address, because they do in Solaris.
5184 However, it seems that they do not in Linux for data that comes from the
5185 DNS. If an address in /etc/hosts has multiple names, they _are_ all given.
5186 I found this out when I moved to a new Linux workstation and tried to run
5187 the Exim test suite.
5189 To get round this problem I have changed the code so that it now does its
5190 own call to the DNS to look up PTR records when searching for a host name.
5191 If nothing can be found in the DNS, it tries gethostbyaddr(), so that
5192 addresses that are only in /etc/hosts are still found.
5194 This behaviour is, however, controlled by an option called host_lookup_
5195 order, which defaults to "bydns:byaddr". If people want to use the other
5196 order, or indeed, just use one or the other means of lookup, they can
5197 specify it in this variable.
5199 6. If a PTR record yields an empty name, Exim treats it as non-existent. In
5200 some operating systems, this comes back from gethostbyaddr() as an empty
5201 string, and this is what Exim used to test for. However, it seems that in
5202 other systems, "." is yielded. Exim now tests for this case too.
5204 7. The values of check_spool_space and check_log_space are now held internally
5205 as a number of kilobytes instead of an absolute number of bytes. If a
5206 numbers is specified without 'K' or 'M', it is rounded up to the nearest
5207 kilobyte. This means that much larger values can be stored.
5209 8. Exim monitor: an attempt to get the action menu when not actually pointing
5210 at a message produces an empty menu entitled "No message selected". This
5211 works on Solaris (OpenWindows). However, XFree86 does not like a menu with
5212 no entries in it ("Shell widget menu has zero width and/or height"). So I
5213 have added a single, blank menu entry in this case.
5215 9. Added ${quote_local_part.
5217 10. MIME decoding is now applied to the contents of Subject: header lines when
5220 11. Now that a reference to $sender_host_address automatically causes a reverse
5221 lookup to occur if necessary (4.13/18), there is no need to arrange for a
5222 host lookup before query-style lookups in lists that might use this
5223 variable. This has therefore been abolished, and the "net-" prefix is no
5224 longer necessary for query-style lookups.
5226 12. The Makefile for SCO_SV contained a setting of LDFLAGS. This appears to
5227 have been a typo for LFLAGS, so it has been changed.
5229 13. The install script calls Exim with "-C /dev/null" in order to find the
5230 version number. If ALT_CONFIG_PREFIX was set, this caused an error message
5231 to be output. Howeve, since Exim outputs its version number before the
5232 error, it didn't break the script. It just looked ugly. I fixed this by
5233 always allowing "-C /dev/null" if the caller is root.
5235 14. Ignore overlarge ACL variable number when reading spool file - insurance
5236 against a later release with more variables having written the file.
5238 15. The standard form for an IPv6 address literal was being rejected by EHLO.
5239 Example: [IPv6:2002:c1ed:8229:10:202:2dff:fe07:a42a]. Exim now accepts
5240 this, as well as the form without the "IPv6" on the front.
5242 16. Added CHOWN_COMMAND=/usr/sbin/chown and LIBS=-lresolv to the
5243 OS/Makefile-Darwin file.
5245 17. Fixed typo in lookups/ldap.c: D_LOOKUP should be D_lookup. This applied
5246 only to LDAP libraries that do not have LDAP_OPT_DEREF.
5248 18. After change 4.21/52, "%ld" was used to format the contents of the $inode
5249 variable. However, some OS use ints for inodes. I've added cast to long int
5250 to get rid of the compiler warning.
5252 19. I had forgotten to lock out "/../" in configuration file names when
5253 ALT_CONFIG_PREFIX was set.
5255 20. Routers used for verification do not need to specify transports. However,
5256 if such a router generated a host list, and callout was configured, Exim
5257 crashed, because it could not find a port number from the (non-existent)
5258 transport. It now assumes port 25 in this circumstance.
5260 21. Added the -t option to exigrep.
5262 22. If LOOKUP_LSEARCH is defined, all three linear search methods (lsearch,
5263 wildlsearch, nwildlsearch) are compiled. LOOKUP_WILDLSEARCH and LOOKUP_
5264 NWILDLSEARCH are now obsolete, but retained for compatibility. If either of
5265 them is set, LOOKUP_LSEARCH is forced.
5267 23. "exim -bV" now outputs a list of lookups that are included in the binary.
5269 24. Added sender and host information to the "rejected by local_scan()" log
5270 line; previously there was no indication of these.
5272 25. Added .include_if_exists.
5274 26. Change 3.952/11 added an explicit directory sync on top of a file sync for
5275 Linux. It turns out that not all file systems support this. Apparently some
5276 versions of NFS do not. (It's rare to put Exim's spool on NFS, but people
5277 do it.) To cope with this, the error EINVAL, which means that sync-ing is
5278 not supported on the file descriptor, is now ignored when Exim is trying to
5279 sync a directory. This applies only to Linux.
5281 27. Added -DBIND_8_COMPAT to the CLFAGS setting for Darwin.
5283 28. In Darwin (MacOS X), the PAM headers are in /usr/include/pam and not in
5284 /usr/include/security. There's now a flag in OS/os.h-Darwin to cope with
5287 29. Added support for maildirsize files from supplied patch (modified a bit).
5289 30. The use of :fail: followed by an empty string could lead Exim to respond to
5290 sender verification failures with (e.g.):
5292 550 Verification failed for <xxx>
5293 550 Sender verify failed
5295 where the first response line was missing the '-' that indicates it is not
5296 the final line of the response.
5298 31. The loop for finding the name of the user that called Exim had a hardwired
5299 limit of 10; it now uses the value of finduser_retries, which is used for
5300 all other user lookups.
5302 32. Added $received_count variable, available in data and not_smtp ACLs, and at
5305 33. Exim was neglecting to zero errno before one call of strtol() when
5306 expanding a string and expecting an integer value. On some systems this
5307 resulted in spurious "integer overflow" errors. Also, it was casting the
5308 result into an int without checking.
5310 34. Testing for a connection timeout using "timeout_connect" in the retry rules
5311 did not work. The code looks as if it has *never* worked, though it appears
5312 to have been documented since at least releast 1.62. I have made it work.
5314 35. The "timeout_DNS" error in retry rules, also documented since at least
5315 1.62, also never worked. As it isn't clear exactly what this means, and
5316 clearly it isn't a major issue, I have abolished the feature by treating it
5317 as "timeout", and writing a warning to the main and panic logs.
5319 36. The display of retry rules for -brt wasn't always showing the error code
5322 37. Added new error conditions to retry rules: timeout_A, timeout_MX,
5323 timeout_connect_A, timeout_connect_MX.
5325 38. Rewriting the envelope sender at SMTP time did not allow it to be rewritten
5326 to the empty sender.
5328 39. The daemon was not analysing the content of -oX till after it had closed
5329 stderr and disconnected from the controlling terminal. This meant that any
5330 syntax errors were only noted on the panic log, and the return code from
5331 the command was 0. By re-arranging the code a little, I've made the
5332 decoding happen first, so such errors now appear on stderr, and the return
5333 code is 1. However, the actual setting up of the sockets still happens in
5334 the disconnected process, so errors there are still only recorded on the
5337 40. A daemon listener on a wildcard IPv6 socket that also accepts IPv4
5338 connections (as happens on some IP stacks) was logged at start up time as
5339 just listening for IPv6. It now logs "IPv6 with IPv4". This differentiates
5340 it from "IPv6 and IPv4", which means that two separate sockets are being
5343 41. The debug output for gethostbyname2() or getipnodebyname() failures now
5344 says whether AF_INET or AF_INET6 was passed as an argument.
5346 42. Exiwhat output was messed up when time zones were included in log
5349 43. Exiwhat now gives more information about the daemon's listening ports,
5350 and whether -tls-on-connect was used.
5352 44. The "port" option of the smtp transport is now expanded.
5354 45. A "message" modifier in a "warn" statement in a non-message ACL was being
5355 silently ignored. Now an error message is written to the main and panic
5358 46. There's a new ACL modifier called "logwrite" which writes to a log file
5359 as soon as it is encountered.
5361 47. Added $local_user_uid and $local_user_gid at routing time.
5363 48. Exim crashed when trying to verify a sender address that was being
5366 49. Exim was recognizing only a space character after ".include". It now also
5367 recognizes a tab character.
5369 50. Fixed several bugs in the Perl script that creates the exim.8 man page by
5370 extracting the relevant information from the specification. The man page no
5371 longer contains scrambled data for the -d option, and I've added a section
5372 at the front about calling Exim under different names.
5374 51. Added "extra_headers" argument to the "mail" command in filter files.
5376 52. Redirecting mail to an unqualified address in a Sieve filter caused Exim to
5379 53. Installed eximstats 1.29.
5381 54. Added transport_filter_timeout as a generic transport option.
5383 55. Exim no longer adds an empty Bcc: header to messages that have no To: or
5384 Cc: header lines. This was required by RFC 822, but it not required by RFC
5387 56. Exim used to add From:, Date:, and Message-Id: header lines to any
5388 incoming messages that did not have them. Now it does so only if the
5389 message originates locally, that is, if there is no associated remote host
5390 address. When Resent- header lines are present, this applies to the Resent-
5391 lines rather than the non-Resent- lines.
5393 57. Drop incoming SMTP connection after too many syntax or protocol errors. The
5394 limit is controlled by smtp_max_synprot_errors, defaulting to 3.
5396 58. Messages for configuration errors now include the name of the main
5397 configuration file - useful now that there may be more than one file in a
5398 list (.included file names were always shown).
5400 59. Change 4.21/82 (run initgroups() when starting the daemon) causes problems
5401 for those rare installations that do not start the daemon as root or run it
5402 setuid root. I've cut out the call to initgroups() if the daemon is not
5405 60. The Exim user and group can now be bound into the binary as text strings
5406 that are looked up at the start of Exim's processing.
5408 61. Applied a small patch for the Interbase code, supplied by Ard Biesheuvel.
5410 62. Added $mailstore_basename variable.
5412 63. Installed patch to sieve.c from Michael Haardt.
5414 64. When Exim failed to open the panic log after failing to open the main log,
5415 the original message it was trying to log was written to stderr and debug
5416 output, but if they were not available (the usual case in production), it
5417 was lost. Now it is written to syslog before the two lines that record the
5418 failures to open the logs.
5420 65. Users' Exim filters run in subprocesses under the user's uid. It is
5421 possible for a "deliver" command or an alias in a "personal" command to
5422 provoke an address rewrite. If logging of address rewriting is configured,
5423 this fails because the process is not running as root or exim. There may be
5424 a better way of dealing with this, but for the moment (because 4.30 needs
5425 to be released), I have disabled address rewrite logging when running a
5426 filter in a non-root, non-exim process.
5432 1. The buildconfig auxiliary program wasn't quoting the value set for
5433 HEADERS_CHARSET. This caused a compilation error complaining that 'ISO' was
5434 not defined. This bug was masked in 4.22 by the effect that was fixed in
5437 2. Some messages that were rejected after a message id was allocated were
5438 shown as "incomplete" by exigrep. It no longer does this for messages that
5439 are rejected by local_scan() or the DATA or non-SMTP ACLs.
5441 3. If a Message-ID: header used a domain literal in the ID, and Exim did not
5442 have allow_domain_literals set, the ID did not get logged in the <= line.
5443 Domain literals are now always recognized in Message-ID: header lines.
5445 4. The first argument for a ${extract expansion item is the key name or field
5446 number. Leading and trailing spaces in this item were not being ignored,
5447 causing some misleading effects.
5449 5. When deliver_drop_privilege was set, single queue runner processes started
5450 manually (i.e. by the command "exim -q") or by the daemon (which uses the
5451 same command in the process it spins off) were not dropping privilege.
5453 6. When the daemon running as "exim" started a queue runner, it always
5454 re-executed Exim in the spun-off process. This is a waste of effort when
5455 deliver_drop_privilege is set. The new process now just calls the
5456 queue-runner function directly.
5462 1. Typo in the src/EDITME file: it referred to HEADERS_DECODE_TO instead of
5465 2. Change 4.21/73 introduced a bug. The pid file path set by -oP was being
5466 ignored. Though the use of -oP was forcing the writing of a pid file, it
5467 was always written to the default place.
5469 3. If the message "no IP address found for host xxxx" is generated during
5470 incoming verification, it is now followed by identification of the incoming
5471 connection (so you can more easily find what provoked it).
5473 4. Bug fix for Sieve filters: "stop" inside a block was not working properly.
5475 5. Added some features to "harden" Exim a bit more against certain attacks:
5477 (a) There is now a build-time option called FIXED_NEVER_USERS that can
5478 be put in Local/Makefile. This is like the never_users runtime option,
5479 but it cannot be overridden. The default setting is "root".
5481 (b) If ALT_CONFIG_PREFIX is defined in Local/Makefile, it specifies a
5482 prefix string with which any file named in a -C command line option
5485 (c) If ALT_CONFIG_ROOT_ONLY is defined in Local/Makefile, root privilege
5486 is retained for -C and -D only if the caller of Exim is root. Without
5487 it, the exim user may also use -C and -D and retain privilege.
5489 (d) If DISABLE_D_OPTION is defined in Local/Makefile, the use of the -D
5490 command line option is disabled.
5492 6. Macro names set by the -D option must start with an upper case letter, just
5493 like macro names defined in the configuration file.
5495 7. Added "dereference=" facility to LDAP.
5497 8. Two instances of the typo "uknown" in the source files are fixed.
5499 9. If a PERL_COMMAND setting in Local/Makefile was not at the start of a line,
5500 the Configure-Makefile script screwed up while processing it.
5502 10. Incorporated PCRE 4.4.
5504 11. The SMTP synchronization check was not operating right at the start of an
5505 SMTP session. For example, it could not catch a HELO sent before the client
5506 waited for the greeting. There is now a check for outstanding input at the
5507 point when the greeting is written. Because of the duplex, asynchronous
5508 nature of TCP/IP, it cannot be perfect - the incorrect input may be on its
5509 way, but not yet received, when the check is performed.
5511 12. Added tcp_nodelay to make it possible to turn of the setting of TCP_NODELAY
5512 on TCP/IP sockets, because this apparently causes some broken clients to
5515 13. Installed revised OS/Makefile-CYGWIN and OS/os.c-cygwin (the .h file was
5516 unchanged) from the Cygwin maintainer.
5518 14. The code for -bV that shows what is in the binary showed "mbx" when maildir
5519 was supported instead of testing for mbx. Effectively a typo.
5521 15. The spa authenticator server code was not checking that the input it
5522 received was valid base64.
5524 16. The debug output line for the "set" modifier in ACLs was not showing the
5525 name of the variable that was being set.
5527 17. Code tidy: the variable type "vtype_string" was never used. Removed it.
5529 18. Previously, a reference to $sender_host_name did not cause a DNS reverse
5530 lookup on its own. Something else was needed to trigger the lookup. For
5531 example, a match in host_lookup or the need for a host name in a host list.
5532 Now, if $sender_host_name is referenced and the host name has not yet been
5533 looked up, a lookup is performed. If the lookup fails, the variable remains
5534 empty, and $host_lookup_failed is set to "1".
5536 19. Added "eqi" as a case-independent comparison operator.
5538 20. The saslauthd authentication condition could segfault if neither service
5539 nor realm was specified.
5541 21. If an overflowing value such as "2048M" was set for message_size_limit, the
5542 error message that was logged was misleading, and incoming SMTP
5543 connections were dropped. The message is now more accurate, and temporary
5544 errors are given to SMTP connections.
5546 22. In some error situations (such as 21 above) Exim rejects all SMTP commands
5547 (except RSET) with a 421 error, until QUIT is received. However, it was
5548 failing to send a response to QUIT.
5550 23. The HELO ACL was being run before the code for helo_try_verify_hosts,
5551 which made it impossible to use "verify = helo" in the HELO ACL. The HELO
5552 ACL is now run after the helo_try_verify_hosts code.
5554 24. "{MD5}" and "{SHA1}" are now recognized as equivalent to "{md5"} and
5555 "{sha1}" in the "crypteq" expansion condition (in fact the comparison is
5556 case-independent, so other case variants are also recognized). Apparently
5557 some systems use these upper case variants.
5559 25. If more than two messages were waiting for the same host, and a transport
5560 filter was specified for the transport, Exim sent two messages over the
5561 same TCP/IP connection, and then failed with "socket operation on non-
5562 socket" when it tried to send the third.
5564 26. Added Exim::debug_write and Exim::log_write for embedded Perl use.
5566 27. The extern definition of crypt16() in expand.c was not being excluded when
5567 the OS had its own crypt16() function.
5569 28. Added bounce_return_body as a new option, and bounce_return_size_limit
5570 as a preferred synonym for return_size_limit, both as an option and as an
5573 29. Added LIBS=-liconv to OS/Makefile-OSF1.
5575 30. Changed the default configuration ACL to relax the local part checking rule
5576 for addresses that are not in any local domains. For these addresses,
5577 slashes and pipe symbols are allowed within local parts, but the sequence
5578 /../ is explicitly forbidden.
5580 31. SPA server authentication was not clearing the challenge buffer before
5583 32. log_message in a "warn" ACL statement was writing to the reject log as
5584 well as to the main log, which contradicts the documentation and doesn't
5585 seem right (because no rejection is happening). So I have stopped it.
5587 33. Added Ard Biesheuvel's lookup code for accessing an Interbase database.
5588 However, I am unable to do any testing of this.
5590 34. Fixed an infelicity in the appendfile transport. When checking directories
5591 for a mailbox, to see if any needed to be created, it was accidentally
5592 using path names with one or more superfluous leading slashes; tracing
5593 would show up entries such as stat("///home/ph10", 0xFFBEEA48).
5595 35. If log_message is set on a "discard" verb in a MAIL or RCPT ACL, its
5596 contents are added to the log line that is written for every discarded
5597 recipient. (Previously a log_message setting was ignored.)
5599 36. The ${quote: operator now quotes the string if it is empty.
5601 37. The install script runs exim in order to find its version number. If for
5602 some reason other than non-existence or emptiness, which it checks, it
5603 could not run './exim', it was installing it with an empty version number,
5604 i.e. as "exim-". This error state is now caught, and the installation is
5607 38. An argument was missing from the function that creates an error message
5608 when Exim fails to connect to the socket for saslauthd authentication.
5609 This could cause Exim to crash, or give a corrupted message.
5611 39. Added isip, isip4, and isip6 to ${if conditions.
5613 40. The ACL variables $acl_xx are now saved with the message, and can be
5614 accessed later in routers, transports, and filters.
5616 41. The new lookup type nwildlsearch is like wildlsearch, except that the key
5617 strings in the file are not string-expanded.
5619 42. If a MAIL command specified a SIZE value that was too large to fit into an
5620 int variable, the check against message_size_limit failed. Such values are
5621 now forced to INT_MAX, which is around 2Gb for a 32-bit variable. Maybe one
5622 day this will have to be increased, but I don't think I want to be around
5623 when emails are that large.
5630 1. Removed HAVE_ICONV=yes from OS/Makefile-FreeBSD, since it seems that
5631 iconv() is not standard in FreeBSD.
5633 2. Change 4.21/17 was buggy and could cause stack overwriting on a system with
5634 IPv6 enabled. The observed symptom was a segmentation fault on return from
5635 the function os_common_find_running_interfaces() in src/os.c.
5637 3. In the check_special_case() function in daemon.c I had used "errno" as an
5638 argument name, which causes warnings on some systems. This was basically a
5639 typo, since it was named "eno" in the comments!
5641 4. The code that waits for the clock to tick (at a resolution of some fraction
5642 of a second) so as to ensure message-id uniqueness was always waiting for
5643 at least one whole tick, when it could have waited for less. [This is
5644 almost certainly not relevant at current processor speeds, where it is
5645 unlikely to ever wait at all. But we try to future-proof.]
5647 5. The function that sleeps for a time interval that includes fractions of a
5648 second contained a race. It did not block SIGALRM between setting the
5649 timer, and suspending (a couple of lines later). If the interval was short
5650 and the sigsuspend() was delayed until after it had expired, the suspension
5651 never ended. On busy systems this could lead to processes getting stuck for
5654 6. Some uncommon configurations may cause a lookup to happen in a queue runner
5655 process, before it forks any delivery processes. The open lookup caching
5656 mechanism meant that the open file or database connection was passed into
5657 the delivery process. The problem was that delivery processes always tidy
5658 up cached lookup data. This could cause a problem for the next delivery
5659 process started by the queue runner, because the external queue runner
5660 process does not know about the closure. So the next delivery process
5661 still has data in the lookup cache. In the case of a file lookup, there was
5662 no problem because closing a file descriptor in a subprocess doesn't affect
5663 the parent. However, if the lookup was caching a connection to a database,
5664 the connection was closed, and the second delivery process was likely to
5665 see errors such as "PGSQL: query failed: server closed the connection
5666 unexpectedly". The problem has been fixed by closing all cached lookups
5667 in a queue runner before running a delivery process.
5669 7. Compiler warning on Linux for the second argument of iconv(), which doesn't
5670 seem to have the "const" qualifier which it has on other OS. I've
5673 8. Change 4.21/2 was too strict. It is only if there are two authenticators
5674 *of the same type* (client or server) with the same public name that an
5675 error should be diagnosed.
5677 9. When Exim looked up a host name for an IP address, but failed to find the
5678 original IP address when looking up the host name (a safety check), it
5679 output the message "<ip address> does not match any IP for NULL", which was
5680 confusing, to say the least. The bug was that the host name should have
5681 appeared instead of "NULL".
5683 10. Since release 3.03, if Exim is called by a uid other than root or the Exim
5684 user that is built into the binary, and the -C or -D options is used, root
5685 privilege is dropped before the configuration file is read. In addition,
5686 logging is switched to stderr instead of the normal log files. If the
5687 configuration then re-defines the Exim user, the unprivileged environment
5688 is probably not what is expected, so Exim logs a panic warning message (but
5691 However, if deliver_drop_privilege is set, the unprivileged state may well
5692 be exactly what is intended, so the warning has been cut out in that case,
5693 and Exim is allowed to try to write to its normal log files.
5699 1. smtp_return_error_details was not giving details for temporary sender
5700 or receiver verification errors.
5702 2. Diagnose a configuration error if two authenticators have the same public
5705 3. Exim used not to create the message log file for a message until the first
5706 delivery attempt. This could be confusing when incoming messages were held
5707 for policy or load reasons. The message log file is now created at the time
5708 the message is received, and an initial "Received" line is written to it.
5710 4. The automatically generated man page for command line options had a minor
5711 bug that caused no ill effects; however, a more serious problem was that
5712 the procedure for building the man page automatically didn't always
5713 operate. Consequently, release 4.20 contains an out-of-date version. This
5714 shouldn't happen again.
5716 5. When building Exim with embedded Perl support, the script that builds the
5717 Makefile was calling 'perl' to find its compile-time parameters, ignoring
5718 any setting of PERL_COMMAND in Local/Makefile. This is now fixed.
5720 6. The freeze_tell option was not being used for messages that were frozen on
5721 arrival, either by an ACL or by local_scan().
5723 7. Added the smtp_incomplete_transaction log selector.
5725 8. After STARTTLS, Exim was not forgetting that it had advertised AUTH, so it
5726 was accepting AUTH without a new EHLO.
5728 9. Added tls_remember_esmtp to cope with YAEB. This allows AUTH and other
5729 ESMTP extensions after STARTTLS without a new EHLO, in contravention of the
5732 10. Logging of TCP/IP connections (when configured) now happens in the main
5733 daemon process instead of the child process, so that the TCP/IP connection
5734 count is more accurate (but it can never be perfect).
5736 11. The use of "drop" in a nested ACL was not being handled correctly in the
5737 outer ACL. Now, if condition failure induced by the nested "drop" causes
5738 the outer ACL verb to deny access ("accept" or "discard" after "endpass",
5739 or "require"), the connection is dropped.
5741 12. Similarly, "discard" in a nested ACL wasn't being handled. A nested ACL
5742 that yield "discard" can now be used with an "accept" or a "discard" verb,
5743 but an error is generated for any others (because I can't see a useful way
5744 to define what should happen).
5746 13. When an ACL is read dynamically from a file (or anywhere else), the lines
5747 are now processed in the same way as lines in the Exim configuration file.
5748 In particular, continuation lines are supported.
5750 14. Added the "dnslists = a.b.c!=n.n.n.n" feature.
5752 15. Added -ti meaning -t -i.
5754 16. Check for letters, digits, hyphens, and dots in the names of dnslist
5755 domains, and warn by logging if others are found.
5757 17. At least on BSD, alignment is not guarenteed for the array of ifreq's
5758 returned from GIFCONF when Exim is trying to find the list of interfaces on
5759 a host. The code in os.c has been modified to copy each ifreq to an aligned
5760 structure in all cases.
5762 Also, in some cases, the returned ifreq's were being copied to a 'struct
5763 ifreq' on the stack, which was subsequently passed to host_ntoa(). That
5764 means the last couple of bytes of an IPv6 address could be chopped if the
5765 ifreq contained only a normal sockaddr (14 bytes storage).
5767 18. Named domain lists were not supported in the hosts_treat_as_local option.
5768 An entry such as +xxxx was not recognized, and was treated as a literal
5771 19. Ensure that header lines added by a DATA ACL are included in the reject log
5772 if the ACL subsequently rejects the message.
5774 20. Upgrade the cramtest.pl utility script to use Digest::MD5 instead of just
5775 MD5 (which is deprecated).
5777 21. When testing a filter file using -bf, Exim was writing a message when it
5778 took the sender from a "From " line in the message, but it was not doing so
5779 when it took $return_path from a Return-Path: header line. It now does.
5781 22. If the contents of a "message" modifier for a "warn" ACL verb do not begin
5782 with a valid header line field name (a series of printing characters
5783 terminated by a colon, Exim now inserts X-ACL-Warn: at the beginning.
5785 23. Changed "disc" in the source to "disk" to conform to the documentation and
5786 the book and for uniformity.
5788 24. Ignore Sendmail's -Ooption=value command line item.
5790 25. When execve() failed while trying to run a command in a pipe transport,
5791 Exim was returning EX_UNAVAILBLE (69) from the subprocess. However, this
5792 could be confused with a return value of 69 from the command itself. This
5793 has been changed to 127, the value the shell returns if it is asked to run
5794 a non-existent command. The wording for the related log line suggests a
5795 non-existent command as the problem.
5797 26. If received_header_text expands to an empty string, do not add a Received:
5798 header line to the message. (Well, it adds a token one on the spool, but
5799 marks it "old" so that it doesn't get used or transmitted.)
5801 27. Installed eximstats 1.28 (addition of -nt option).
5803 28. There was no check for failure on the call to getsockname() in the daemon
5804 code. This can fail if there is a shortage of resources on the system, with
5805 ENOMEM, for example. A temporary error is now given on failure.
5807 29. Contrary to the C standard, it seems that in some environments, the
5808 equivalent of setlocale(LC_ALL, "C") is not obeyed at the start of a C
5809 program. Exim now does this explicitly; it affects the formatting of
5810 timestamps using strftime().
5812 30. If exiqsumm was given junk data, it threw up some uninitialized variable
5813 complaints. I've now initialized all the variables, to avoid this.
5815 32. Header lines added by a system filter were not being "seen" during
5816 transport-time rewrites.
5818 33. The info_callback() function passed to OpenSSL is set up with type void
5819 (*)(SSL *, int, int), as described somewhere. However, when calling the
5820 function (actually a macro) that sets it up, the type void(*)() is
5821 expected. I've put in a cast to prevent warnings from picky compilers.
5823 34. If a DNS black list lookup found a CNAME record, but there were no A
5824 records associated with the domain it pointed at, Exim crashed.
5826 35. If a DNS black list lookup returned more than one A record, Exim ignored
5827 all but the first. It now scans all returned addresses if a particular IP
5828 value is being sought. In this situation, the contents of the
5829 $dnslist_value variable are a list of all the addresses, separated by a
5832 36. Tightened up the rules for host name lookups using reverse DNS. Exim used
5833 to accept a host name and all its aliases if the forward lookup for any of
5834 them yielded the IP address of the incoming connection. Now it accepts only
5835 those names whose forward lookup yields the correct IP address. Any other
5836 names are discarded. This closes a loophole whereby a rogue DNS
5837 administrator could create reverse DNS records to break through a
5838 wildcarded host restriction in an ACL.
5840 37. If a user filter or a system filter that ran in a subprocess used any of
5841 the numerical variables ($1, $2 etc), or $thisaddress, in a pipe command,
5842 the wrong values were passed to the pipe command ($thisaddress had the
5843 value of $0, $0 had the value of $1, etc). This bug was introduced by
5844 change 4.11/101, and not discovered because I wrote an inadequate test. :-(
5846 38. Improved the line breaking for long SMTP error messages from ACLs.
5847 Previously, if there was no break point between 40 and 75 characters, Exim
5848 left the rest of the message alone. Two changes have been made: (a) I've
5849 reduced the minimum length to 35 characters; (b) if it can't find a break
5850 point between 35 and 75 characters, it looks ahead and uses the first one
5851 that it finds. This may give the occasional overlong line, but at least the
5852 remaining text gets split now.
5854 39. Change 82 of 4.11 was unimaginative. It assumed the limit on the number of
5855 file descriptors might be low, and that setting 1000 would always raise it.
5856 It turns out that in some environments, the limit is already over 1000 and
5857 that lowering it causes trouble. So now Exim takes care not to decrease it.
5859 40. When delivering a message, the value of $return_path is set to $sender_
5860 address at the start of routing (routers may change the value). By an
5861 oversight, this default was not being set up when an address was tested by
5862 -bt or -bv, which affected the outcome if any router or filter referred to
5865 41. The idea of the "warn" ACL verb is that it adds a header or writes to the
5866 log only when "message" or "log_message" are set. However, if one of the
5867 conditions was an address verification, or a call to a nested ACL, the
5868 messages generated by the underlying test were being passed through. This
5869 no longer happens. The underlying message is available in $acl_verify_
5870 message for both "message" and "log_message" expansions, so it can be
5871 passed through if needed.
5873 42. Added RFC 2047 interpretation of header lines for $h_ expansions, with a
5874 new expansion $bh_ to give the encoded byte string without charset
5875 translation. Translation happens only if iconv() is available; HAVE_ICONV
5876 indicates this at build time. HEADERS_CHARSET gives the charset to
5877 translate to; headers_charset can change it in the configuration, and
5878 "headers charset" can change it in an individual filter file.
5880 43. Now that we have a default RFC 2047 charset (see above), the code in Exim
5881 that creates RFC 2047 encoded "words" labels them as that charset instead
5882 of always using iso-8859-1. The cases are (i) the explicit ${rfc2047:
5883 expansion operator; (ii) when Exim creates a From: line for a local
5884 message; (iii) when a header line is rewritten to include a "phrase" part.
5886 44. Nasty bug in exiqsumm: the regex to skip already-delivered addresses was
5887 buggy, causing it to skip the first lines of messages whose message ID
5888 ended in 'D'. This would not have bitten before Exim release 4.14, because
5889 message IDs were unlikely to end in 'D' before then. The effect was to have
5890 incorrect size information for certain domains.
5892 45. #include "config.h" was missing at the start of the crypt16.c module. This
5893 caused trouble on Tru64 (aka OSF1) systems, because HAVE_CRYPT16 was not
5896 46. If there was a timeout during a "random" callout check, Exim treated it as
5897 a failure of the random address, and carried on sending RSET and the real
5898 address. If the delay was just some slowness somewhere, the response to the
5899 original RCPT would be taken as a response to RSET and so on, causing
5900 mayhem of various kinds.
5902 47. Change 50 for 4.20 was a heap of junk. I don't know what I was thinking
5903 when I implemented it. It didn't allow for the fact that some option values
5904 may legitimatetly be negative (e.g. size_addition), and it didn't even do
5905 the right test for positive values.
5907 48. Domain names in DNS records are case-independent. Exim always looks them up
5908 in lower case. Some resolvers return domain names in exactly the case they
5909 appear in the zone file, that is, they may contain uppercase letters. Not
5910 all resolvers do this - some return always lower case. Exim was treating a
5911 change of case by a resolver as a change of domain, similar to a widening
5912 of a domain abbreviation. This triggered its re-routing code and so it was
5913 trying to route what was effectively the same domain again. This normally
5914 caused routing to fail (because the router wouldn't handle the domain
5915 twice). Now Exim checks for this case specially, and just changes the
5916 casing of the domain that it ultimately uses when it transmits the message
5919 49. Added Sieve (RFC 3028) support, courtesy of Michael Haardt's contributed
5922 50. If a filter generated a file delivery with a non-absolute name (possible if
5923 no home directory exists for the router), the forbid_file option was not
5926 51. Added '&' feature to dnslists, to provide bit mask matching in addition to
5927 the existing equality matching.
5929 52. Exim was using ints instead of ino_t variables in some places where it was
5930 dealing with inode numbers.
5932 53. If TMPDIR is defined in Local/Makefile (default in src/EDITME is
5933 TMPDIR="/tmp"), Exim checks for the presence of an environment variable
5934 called TMPDIR, and if it finds it is different, it changes its value.
5936 54. The smtp_printf() function is now made available to local_scan() so
5937 additional output lines can be written before returning. There is also an
5938 smtp_fflush() function to enable the detection of a dropped connection.
5939 The variables smtp_input and smtp_batched_input are exported to
5942 55. Changed the default runtime configuration: the message "Unknown user"
5943 has been removed from the ACL, and instead placed on the localuser router,
5944 using the cannot_route_message feature. This means that any verification
5945 failures that generate their own messages won't get overridden. Similarly,
5946 the "Unrouteable address" message that was in the ACL for unverifiable
5947 relay addresses has also been removed.
5949 56. Added hosts_avoid_esmtp to the smtp transport.
5951 57. The exicyclog script was not checking for the esoteric option
5952 CONFIGURE_FILE_USE_EUID in the Local/Makefile. It now does this, but it
5953 will work only if exicyclog is run under the appropriate euid.
5955 58. Following a discussion on the list, the rules by which Exim recognises line
5956 endings on incoming messages have been changed. The -dropcr and drop_cr
5957 options are now no-ops, retained only for backwards compatibility. The
5958 following line terminators are recognized: LF CRLF CR. However, special
5959 processing applies to CR:
5961 (i) The sequence CR . CR does *not* terminate an incoming SMTP message,
5962 nor a local message in the state where . is a terminator.
5964 (ii) If a bare CR is encountered in a header line, an extra space is added
5965 after the line terminator so as not to end the header. The reasoning
5966 behind this is that bare CRs in header lines are most likely either
5967 to be mistakes, or people trying to play silly games.
5969 59. The size of a message, as listed by "-bp" or in the Exim monitor window,
5970 was being incorrectly given as 18 bytes larger than it should have been.
5971 This is a VOB (very old bug).
5973 60. This may never have affected anything current, but just in case it has:
5974 When the local host is found other than at the start of a list of hosts,
5975 the local host, those with the same MX, and any that follow, are discarded.
5976 When the list in question was part of a longer list of hosts, the following
5977 hosts (not currently being processed) were also being discarded. This no
5978 longer happens. I'm not sure if this situation could ever has previously
5981 61. Added the "/MX" feature to lists of hosts in the manualroute and query
5984 62. Whenever Exim generates a new message, it now adds an Auto-Submitted:
5985 header. This is something that is recommended in a new Internet Draft, and
5986 is something that is documented as being done by Sendmail. There are two
5987 possible values. For messages generated by the autoreply transport, Exim
5990 Auto-Submitted: auto-replied
5992 whereas for all other generated messages (e.g. bounces) it adds
5994 Auto-Submitted: auto-generated
5996 63. The "personal" condition in filters now includes a test for the
5997 Auto-Submitted: header. If it contains the string "auto-" the message it
5998 not considered personal.
6000 64. Added rcpt_include_affixes as a generic transport option.
6002 65. Added queue_only_override (default true).
6004 66. Added the syslog_duplication option.
6006 67. If what should have been the first header line of a message consisted of
6007 a space followed by a colon, Exim was mis-interpreting it as a header line.
6008 It isn't of course - it is syntactically invalid and should therefore be
6009 treated as the start of the message body. The misbehaviour could have
6010 caused a number of strange effects, including loss of data in subsequent
6011 header lines, and spool format errors.
6013 68. Formerly, the AUTH parameter on a MAIL command was trusted only if the
6014 client host had authenticated. This control can now be exercised by an ACL
6015 for more flexibility.
6017 69. By default, callouts do not happen when testing with -bh. There is now a
6018 variant, -bhc, which does actually run the callout code, including
6019 consulting and updating the callout cache.
6021 70. Added support for saslauthd authentication, courtesy of Alexander
6024 71. If statvfs() failed on the spool or log directories while checking their
6025 size for availability, Exim confusingly gave the error "space shortage".
6026 Furthermore, in debugging mode it crashed with a floating point exception.
6027 These checks are done if check_{spool,log}_{space,inodes} are set, and when
6028 an SMTP message arrives with SIZE= on the MAIL command. As this is a really
6029 serious problem, Exim now writes to the main and panic logs when this
6030 happens, with details of the failure. It then refuses to accept the
6031 incoming message, giving the message "spool directory problem" or "log
6032 directory problem" with a 421 code for SMTP messages.
6034 72. When Exim is about to re-exec itself, it ensures that the file descriptors
6035 0, 1, and 2 exist, because some OS complain for execs without them (see
6036 ChangeLog 4.05/30). If necessary, Exim opens /dev/null to use for these
6037 descriptors. However, the code omitted to check that the open succeeded,
6038 causing mysterious errors if for some reason the permissions on /dev/null
6039 got screwed. Now Exim writes a message to the main and panic logs, and
6040 bombs out if it can't open /dev/null.
6042 73. Re-vamped the way daemon_smtp_port, local_interfaces, and -oX work and
6043 interact so that it is all more flexible. It is supposed to remain
6044 backwards compatible. Also added extra_local_interfaces.
6046 74. Invalid data sent to a SPA (NTLM) server authenticator could cause the code
6047 to bomb out with an assertion failure - to the client this appears as a
6048 connection drop. This problem occurs in the part of the code that was taken
6049 from the Samba project. Fortunately, the assertion is in a very simple
6050 function, so I have fixed this by reproducing the function inline in the
6051 one place where it is called, and arranging for authentication to fail
6052 instead of killing the process with assert().
6054 75. The SPA client code was not working when the server requested OEM rather
6055 than Unicode encoding.
6057 76. Added code to make require_files with a specific uid setting more usable in
6058 the case where statting the file as root fails - usually a non-root-mounted
6059 NFS file system. When this happens and the failure is EACCES, Exim now
6060 forks a subprocess and does the per-uid checking as the relevant uid.
6062 77. Added process_log_path.
6064 78. If log_file_path was not explicitly set, a setting of check_log_space or
6065 check_log_inodes was ignored.
6067 79. If a space check for the spool or log partitions fails, the incident is now
6068 logged. Of course, in the latter case the data may get lost...
6070 80. Added the %p formatting code to string_format() so that it can be used to
6071 print addresses in debug_print(). Adjusted all the address printing in the
6072 debugging in store.c to use %p rather than %d.
6074 81. There was a concern that a line of code in smtp_in.c could overflow a
6075 buffer if a HELO/EHLO command was given followed by 500 or so spaces. As
6076 initially expressed, the concern was not well-founded, because trailing
6077 spaces are removed early. However, if the trailing spaces were followed by
6078 a NULL, they did not get removed, so the overflow was possible. Two fixes
6081 (a) I re-wrote the offending code in a cleaner fashion.
6082 (b) If an incoming SMTP command contains a NULL character, it is rejected
6085 82. When Exim changes uid/gid to the Exim user at daemon start time, it now
6086 runs initgroups(), so that if the Exim user is in any additional groups,
6087 they will be used during message reception.
6093 The change log for 4.20 and earlier releases has been archived.
projects / exim.git / blob