1 Change log file for Exim from version 4.21
2 -------------------------------------------
7 TL/01 When running the test suite, the README says that variables such as
8 no_msglog_check are global and can be placed anywhere in a specific
9 test's script, however it was observed that placement needed to be near
10 the beginning for it to behave that way. Changed the runtest perl
11 script to read through the entire script once to detect and set these
12 variables, reset to the beginning of the script, and then run through
13 the script parsing/test process like normal.
15 TL/02 The BSD's have an arc4random API. One of the functions to induce
16 adding randomness was arc4random_stir(), but it has been removed in
17 OpenBSD 5.5. Detect this OpenBSD version and skip calling this
18 function when detected.
20 JH/01 Expand the EXPERIMENTAL_TPDA feature. Several different events now
21 cause callback expansion.
23 TL/03 Bugzilla 1518: Clarify "condition" processing in routers; that
24 syntax errors in an expansion can be treated as a string instead of
25 logging or causing an error, due to the internal use of bool_lax
26 instead of bool when processing it.
28 JH/02 Add EXPERIMENTAL_DANE, allowing for using the DNS as trust-anchor for
29 server certificates when making smtp deliveries.
34 TL/01 Bugzilla 1506: Re-add a 'return NULL' to silence complaints from static
35 checkers that were complaining about end of non-void function with no
38 JH/01 Bug 1513: Fix parsing of quoted parameter values in MIME headers.
39 This was a regression intruduced in 4.83 by another bugfix.
41 JH/02 Fix broken compilation when EXPERIMENTAL_DSN is enabled.
43 TL/02 Bug 1509: Fix exipick for enhanced spoolfile specification used when
44 EXPERIMENTAL_DSN is enabled. Fix from Wolfgang Breyha.
50 TF/01 Correctly close the server side of TLS when forking for delivery.
52 When a message was received over SMTP with TLS, Exim failed to clear up
53 the incoming connection properly after forking off the child process to
54 deliver the message. In some situations the subsequent outgoing
55 delivery connection happened to have the same fd number as the incoming
56 connection previously had. Exim would try to use TLS and fail, logging
57 a "Bad file descriptor" error.
59 TF/02 Portability fix for building lookup modules on Solaris when the xpg4
60 utilities have not been installed.
62 JH/01 Fix memory-handling in use of acl as a conditional; avoid free of
63 temporary space as the ACL may create new global variables.
65 TL/01 LDAP support uses per connection or global context settings, depending
66 upon the detected version of the libraries at build time.
68 TL/02 Experimental Proxy Protocol support: allows a proxied SMTP connection
69 to extract and use the src ip:port in logging and expansions as if it
70 were a direct connection from the outside internet. PPv2 support was
71 updated based on HAProxy spec change in May 2014.
73 JH/02 Add ${listextract {number}{list}{success}{fail}}.
75 TL/03 Bugzilla 1433: Fix DMARC SEGV with specific From header contents.
76 Properly escape header and check for NULL return.
78 PP/01 Continue incomplete 4.82 PP/19 by fixing docs too: use dns_dnssec_ok
81 JH/03 Bugzilla 1157: support log_selector smtp_confirmation for lmtp.
83 TL/04 Add verify = header_names_ascii check to reject email with non-ASCII
84 characters in header names, implemented as a verify condition.
85 Contributed by Michael Fischer v. Mollard.
87 TL/05 Rename SPF condition results err_perm and err_temp to standardized
88 results permerror and temperror. Previous values are deprecated but
89 still accepted. In a future release, err_perm and err_temp will be
90 completely removed, which will be a backward incompatibility if the
91 ACL tests for either of these two old results. Patch contributed by
92 user bes-internal on the mailing list.
94 JH/04 Add ${utf8clean:} operator. Contributed by Alex Rau.
96 JH/05 Bugzilla 305: Log incoming-TLS details on rejects, subject to log
97 selectors, in both main and reject logs.
99 JH/06 Log outbound-TLS and port details, subject to log selectors, for a
102 JH/07 Add malware type "sock" for talking to simple daemon.
104 JH/08 Bugzilla 1371: Add tls_{,try_}verify_hosts to smtp transport.
106 JH/09 Bugzilla 1431: Support (with limitations) headers_add/headers_remove in
107 routers/transports under cutthrough routing.
109 JH/10 Bugzilla 1005: ACL "condition =" should accept values which are negative
110 numbers. Touch up "bool" conditional to keep the same definition.
112 TL/06 Remove duplicated language in spec file from 4.82 TL/16.
114 JH/11 Add dnsdb tlsa lookup. From Todd Lyons.
116 JH/12 Expand items in router/transport headers_add or headers_remove lists
117 individually rather than the list as a whole. Bug 1452.
119 Required for reasonable handling of multiple headers_ options when
120 they may be empty; requires that headers_remove items with embedded
121 colons must have them doubled (or the list-separator changed).
123 TL/07 Add new dmarc expansion variable $dmarc_domain_policy to directly
124 view the policy declared in the DMARC record. Currently, $dmarc_status
125 is a combined value of both the record presence and the result of the
128 JH/13 Fix handling of $tls_cipher et.al. in (non-verify) transport. Bug 1455.
130 JH/14 New options dnssec_request_domains, dnssec_require_domains on the
131 dnslookup router and the smtp transport (applying to the forward
134 TL/08 Bugzilla 1453: New LDAP "SERVERS=" option allows admin to override list
135 of ldap servers used for a specific lookup. Patch provided by Heiko
138 JH/18 New options dnssec_lax, dnssec_strict on dnsdb lookups.
139 New variable $lookup_dnssec_authenticated for observability.
141 TL/09 Bugzilla 609: Add -C option to exiqgrep, specify which exim.conf to use.
142 Patch submitted by Lars Timman.
144 JH/19 EXPERIMENTAL_OCSP support under GnuTLS. Bug 1459.
146 TL/10 Bugzilla 1454: New -oMm option to pass message reference to Exim.
147 Requires trusted mode and valid format message id, aborts otherwise.
148 Patch contributed by Heiko Schlichting.
150 JH/20 New expansion variables tls_(in,out)_(our,peer)cert, and expansion item
151 certextract with support for various fields. Bug 1358.
153 JH/21 Observability of OCSP via variables tls_(in,out)_ocsp. Stapling
154 is requested by default, modifiable by smtp transport option
157 JH/22 Expansion operators ${md5:string} and ${sha1:string} can now
158 operate on certificate variables to give certificate fingerprints
159 Also new ${sha256:cert_variable}.
161 JH/23 The PRDR feature is moved from being Experimental into the mainline.
163 TL/11 Bug 1119: fix memory allocation in string_printing2(). Patch from
164 Christian Aistleitner.
166 JH/24 The OCSP stapling feature is moved from Experimental into the mainline.
168 TL/12 Bug 1444: Fix improper \r\n sequence handling when writing spool
169 file. Patch from Wolfgang Breyha.
171 JH/25 Expand the coverage of the delivery $host and $host_address to
172 client authenticators run in verify callout. Bug 1476.
174 JH/26 Port service names are now accepted for tls_on_connect_ports, to
175 align with daemon_smtp_ports. Bug 72.
177 TF/03 Fix udpsend. The ip_connectedsocket() function's socket type
178 support and error reporting did not work properly.
180 TL/13 Bug 1495: Exiqgrep check if -C config file specified on cli exists
181 and is readable. Patch from Andrew Colin Kissa.
183 TL/14 Enhance documentation of ${run expansion and how it parses the
184 commandline after expansion, particularly in the case when an
185 unquoted variable expansion results in an empty value.
187 JH/27 The TLS SNI feature was broken in 4.82. Fix it.
189 PP/02 Fix internal collision of T_APL on systems which support RFC3123
190 by renaming away from it. Addresses GH issue 15, reported by
193 JH/28 Fix parsing of MIME headers for parameters with quoted semicolons.
195 TL/15 SECURITY: prevent double expansion in math comparison functions
196 (can expand unsanitized data). Not remotely exploitable.
203 PP/01 Add -bI: framework, and -bI:sieve for querying sieve capabilities.
205 PP/02 Make -n do something, by making it not do something.
206 When combined with -bP, the name of an option is not output.
208 PP/03 Added tls_dh_min_bits SMTP transport driver option, only honoured
211 PP/04 First step towards DNSSEC, provide $sender_host_dnssec for
212 $sender_host_name and config options to manage this, and basic check
215 PP/05 DSCP support for outbound connections and control modifier for inbound.
217 PP/06 Cyrus SASL: set local and remote IP;port properties for driver.
218 (Only plugin which currently uses this is kerberos4, which nobody should
219 be using, but we should make it available and other future plugins might
220 conceivably use it, even though it would break NAT; stuff *should* be
221 using channel bindings instead).
223 PP/07 Handle "exim -L <tag>" to indicate to use syslog with tag as the process
224 name; added for Sendmail compatibility; requires admin caller.
225 Handle -G as equivalent to "control = suppress_local_fixups" (we used to
226 just ignore it); requires trusted caller.
227 Also parse but ignore: -Ac -Am -X<logfile>
230 TL/01 Bugzilla 1258 - Refactor MAIL FROM optional args processing.
232 TL/02 Add +smtp_confirmation as a default logging option.
234 TL/03 Bugzilla 198 - Implement remove_header ACL modifier.
235 Patch by Magnus Holmgren from 2007-02-20.
237 TL/04 Bugzilla 1281 - Spec typo.
238 Bugzilla 1283 - Spec typo.
239 Bugzilla 1290 - Spec grammar fixes.
241 TL/05 Bugzilla 1285 - Spec omission, fix docbook errors for spec.txt creation.
243 TL/06 Add Experimental DMARC support using libopendmarc libraries.
245 TL/07 Fix an out of order global option causing a segfault. Reported to dev
246 mailing list by by Dmitry Isaikin.
248 JH/01 Bugzilla 1201 & 304 - New cutthrough-delivery feature, with TLS support.
250 JH/02 Support "G" suffix to numbers in ${if comparisons.
252 PP/08 Handle smtp transport tls_sni option forced-fail for OpenSSL.
254 NM/01 Bugzilla 1197 - Spec typo
255 Bugzilla 1196 - Spec examples corrections
257 JH/03 Add expansion operators ${listnamed:name} and ${listcount:string}
259 PP/09 Add gnutls_allow_auto_pkcs11 option (was originally called
260 gnutls_enable_pkcs11, but renamed to more accurately indicate its
263 PP/10 Let Linux makefile inherit CFLAGS/CFLAGS_DYNAMIC.
264 Pulled from Debian 30_dontoverridecflags.dpatch by Andreas Metzler.
266 JH/04 Add expansion item ${acl {name}{arg}...}, expansion condition
267 "acl {{name}{arg}...}", and optional args on acl condition
270 JH/05 Permit multiple router/transport headers_add/remove lines.
272 JH/06 Add dnsdb pseudo-lookup "a+" to do an "aaaa" + "a" combination.
274 JH/07 Avoid using a waiting database for a single-message-only transport.
275 Performance patch from Paul Fisher. Bugzilla 1262.
277 JH/08 Strip leading/trailing newlines from add_header ACL modifier data.
280 JH/09 Add $headers_added variable, with content from use of ACL modifier
281 add_header (but not yet added to the message). Bugzilla 199.
283 JH/10 Add 8bitmime log_selector, for 8bitmime status on the received line.
284 Pulled from Bugzilla 817 by Wolfgang Breyha.
286 PP/11 SECURITY: protect DKIM DNS decoding from remote exploit.
288 (nb: this is the same fix as in Exim 4.80.1)
290 JH/11 Add A= logging on delivery lines, and a client_set_id option on
293 JH/12 Add optional authenticated_sender logging to A= and a log_selector
296 PP/12 Unbreak server_set_id for NTLM/SPA auth, broken by 4.80 PP/29.
298 PP/13 Dovecot auth: log better reason to rejectlog if Dovecot did not
299 advertise SMTP AUTH mechanism to us, instead of a generic
300 protocol violation error. Also, make Exim more robust to bad
301 data from the Dovecot auth socket.
303 TF/01 Fix ultimate retry timeouts for intermittently deliverable recipients.
305 When a queue runner is handling a message, Exim first routes the
306 recipient addresses, during which it prunes them based on the retry
307 hints database. After that it attempts to deliver the message to
308 any remaining recipients. It then updates the hints database using
311 So if a recipient address works intermittently, it can get repeatedly
312 deferred at routing time. The retry hints record remains fresh so the
313 address never reaches the final cutoff time.
315 This is a fairly common occurrence when a user is bumping up against
316 their storage quota. Exim had some logic in its local delivery code
317 to deal with this. However it did not apply to per-recipient defers
318 in remote deliveries, e.g. over LMTP to a separate IMAP message store.
320 This change adds a proper retry rule check during routing so that the
321 final cutoff time is checked against the message's age. We only do
322 this check if there is an address retry record and there is not a
323 domain retry record; this implies that previous attempts to handle
324 the address had the retry_use_local_parts option turned on. We use
325 this as an approximation for the destination being like a local
326 delivery, as in LMTP.
328 I suspect this new check makes the old local delivery cutoff check
329 redundant, but I have not verified this so I left the code in place.
331 TF/02 Correct gecos expansion when From: is a prefix of the username.
333 Test 0254 submits a message to Exim with the header
337 When I ran the test suite under the user fanf2, Exim expanded
338 the header to contain my full name, whereas it should have added
339 a Resent-Sender: header. It erroneously treats any prefix of the
340 username as equal to the username.
342 This change corrects that bug.
344 GF/01 DCC debug and logging tidyup
345 Error conditions log to paniclog rather than rejectlog.
346 Debug lines prefixed by "DCC: " to remove any ambiguity.
348 TF/03 Avoid unnecessary rebuilds of lookup-related code.
350 PP/14 Fix OCSP reinitialisation in SNI handling for Exim/TLS as server.
351 Bug spotted by Jeremy Harris; was flawed since initial commit.
352 Would have resulted in OCSP responses post-SNI triggering an Exim
353 NULL dereference and crash.
355 JH/13 Add $router_name and $transport_name variables. Bugzilla 308.
357 PP/15 Define SIOCGIFCONF_GIVES_ADDR for GNU Hurd.
358 Bug detection, analysis and fix by Samuel Thibault.
359 Bugzilla 1331, Debian bug #698092.
361 SC/01 Update eximstats to watch out for senders sending 'HELO [IpAddr]'
363 JH/14 SMTP PRDR (http://www.eric-a-hall.com/specs/draft-hall-prdr-00.txt).
364 Server implementation by Todd Lyons, client by JH.
365 Only enabled when compiled with EXPERIMENTAL_PRDR. A new
366 config variable "prdr_enable" controls whether the server
367 advertises the facility. If the client requests PRDR a new
368 acl_data_smtp_prdr ACL is called once for each recipient, after
369 the body content is received and before the acl_smtp_data ACL.
370 The client is controlled by bolth of: a hosts_try_prdr option
371 on the smtp transport, and the server advertisement.
372 Default client logging of deliveries and rejections involving
373 PRDR are flagged with the string "PRDR".
375 PP/16 Fix problems caused by timeouts during quit ACLs trying to double
376 fclose(). Diagnosis by Todd Lyons.
378 PP/17 Update configure.default to handle IPv6 localhost better.
379 Patch by Alain Williams (plus minor tweaks).
382 PP/18 OpenSSL made graceful with empty tls_verify_certificates setting.
383 This is now consistent with GnuTLS, and is now documented: the
384 previous undocumented portable approach to treating the option as
385 unset was to force an expansion failure. That still works, and
386 an empty string is now equivalent.
388 PP/19 Renamed DNSSEC-enabling option to "dns_dnssec_ok", to make it
389 clearer that Exim is using the DO (DNSSEC OK) EDNS0 resolver flag,
390 not performing validation itself.
392 PP/20 Added force_command boolean option to pipe transport.
393 Patch from Nick Koston, of cPanel Inc.
395 JH/15 AUTH support on callouts (and hence cutthrough-deliveries).
398 TF/04 Added udpsend ACL modifer and hexquote expansion operator
400 PP/21 Fix eximon continuous updating with timestamped log-files.
401 Broken in a format-string cleanup in 4.80, missed when I repaired the
402 other false fix of the same issue.
403 Report and fix from Heiko Schlichting.
406 PP/22 Guard LDAP TLS usage against Solaris LDAP variant.
407 Report from Prashanth Katuri.
409 PP/23 Support safari_ecdhe_ecdsa_bug for openssl_options.
410 It's SecureTransport, so affects any MacOS clients which use the
411 system-integrated TLS libraries, including email clients.
413 PP/24 Fix segfault from trying to fprintf() to a NULL stdio FILE* if
414 using a MIME ACL for non-SMTP local injection.
415 Report and assistance in diagnosis by Warren Baker.
417 TL/08 Adjust exiqgrep to be case-insensitive for sender/receiver.
419 JH/16 Fix comparisons for 64b. Bugzilla 1385.
421 TL/09 Add expansion variable $authenticated_fail_id to keep track of
422 last id that failed so it may be referenced in subsequent ACL's.
424 TL/10 Bugzilla 1375 - Prevent TLS rebinding in ldap. Patch provided by
427 TL/11 Bugzilla 1382 - Option ldap_require_cert overrides start_tls
428 ldap library initialization, allowing self-signed CA's to be
429 used. Also properly sets require_cert option later in code by
430 using NULL (global ldap config) instead of ldap handle (per
431 session). Bug diagnosis and testing by alxgomz.
433 TL/12 Enhanced documentation in the ratelimit.pl script provided in
434 the src/util/ subdirectory.
436 TL/13 Bug 1031 - Imported transport SQL logging patch from Axel Rau
437 renamed to Transport Post Delivery Action by Jeremy Harris, as
440 TL/14 Bugzilla 1217 - Redis lookup support has been added. It is only enabled
441 when Exim is compiled with EXPERIMENTAL_REDIS. A new config variable
442 redis_servers = needs to be configured which will be used by the redis
443 lookup. Patch from Warren Baker, of The Packet Hub.
445 TL/15 Fix exiqsumm summary for corner case. Patch provided by Richard Hall.
447 TL/16 Bugzilla 1289 - Clarify host/ip processing when have errors looking up a
448 hostname or reverse DNS when processing a host list. Used suggestions
449 from multiple comments on this bug.
451 TL/17 Bugzilla 1057 - Multiple clamd TCP targets patch from Mark Zealey.
453 TL/18 Had previously added a -CONTINUE option to runtest in the test suite.
454 Missed a few lines, added it to make the runtest require no keyboard
457 TL/19 Bugzilla 1402 - Test 533 fails if any part of the path to the test suite
458 contains upper case chars. Make router use caseful_local_part.
460 TL/20 Bugzilla 1400 - Add AVOID_GNUTLS_PKCS11 build option. Allows GnuTLS
461 support when GnuTLS has been built with p11-kit.
467 PP/01 SECURITY: protect DKIM DNS decoding from remote exploit.
469 This, or similar/improved, will also be change PP/11 of 4.82.
475 PP/01 Handle short writes when writing local log-files.
476 In practice, only affects FreeBSD (8 onwards).
477 Bugzilla 1053, with thanks to Dmitry Isaikin.
479 NM/01 Bugzilla 949 - Documentation tweak
481 NM/02 Bugzilla 1093 - eximstats DATA reject detection regexps
484 NM/03 Bugzilla 1169 - primary_hostname spelling was incorrect in docs.
486 PP/02 Implemented gsasl authenticator.
488 PP/03 Implemented heimdal_gssapi authenticator with "server_keytab" option.
490 PP/04 Local/Makefile support for (AUTH|LOOKUP)_*_PC=foo to use
491 `pkg-config foo` for cflags/libs.
493 PP/05 Swapped $auth1/$auth2 for gsasl GSSAPI mechanism, to be more consistent
494 with rest of GSASL and with heimdal_gssapi.
496 PP/06 Local/Makefile support for USE_(GNUTLS|OPENSSL)_PC=foo to use
497 `pkg-config foo` for cflags/libs for the TLS implementation.
499 PP/07 New expansion variable $tls_bits; Cyrus SASL server connection
500 properties get this fed in as external SSF. A number of robustness
501 and debugging improvements to the cyrus_sasl authenticator.
503 PP/08 cyrus_sasl server now expands the server_realm option.
505 PP/09 Bugzilla 1214 - Log authentication information in reject log.
506 Patch by Jeremy Harris.
508 PP/10 Added dbmjz lookup type.
510 PP/11 Let heimdal_gssapi authenticator take a SASL message without an authzid.
512 PP/12 MAIL args handles TAB as well as SP, for better interop with
513 non-compliant senders.
514 Analysis and variant patch by Todd Lyons.
516 NM/04 Bugzilla 1237 - fix cases where printf format usage not indicated
517 Bug report from Lars Müller <lars@samba.org> (via SUSE),
518 Patch from Dirk Mueller <dmueller@suse.com>
520 PP/13 tls_peerdn now print-escaped for spool files.
521 Observed some $tls_peerdn in wild which contained \n, which resulted
522 in spool file corruption.
524 PP/14 TLS fixes for OpenSSL: support TLS 1.1 & 1.2; new "openssl_options"
525 values; set SSL_MODE_AUTO_RETRY so that OpenSSL will retry a read
526 or write after TLS renegotiation, which otherwise led to messages
529 TK/01 Bugzilla 1239 - fix DKIM verification when signature was not inserted
530 as a tracking header (ie: a signed header comes before the signature).
531 Patch from Wolfgang Breyha.
533 JH/01 Bugzilla 660 - Multi-valued attributes from ldap now parseable as a
534 comma-sep list; embedded commas doubled.
536 JH/02 Refactored ACL "verify =" logic to table-driven dispatch.
538 PP/15 LDAP: Check for errors of TLS initialisation, to give correct
540 Report and patch from Dmitry Banschikov.
542 PP/16 Removed "dont_insert_empty_fragments" fron "openssl_options".
543 Removed SSL_clear() after SSL_new() which led to protocol negotiation
544 failures. We appear to now support TLS1.1+ with Exim.
546 PP/17 OpenSSL: new expansion var $tls_sni, which if used in tls_certificate
547 lets Exim select keys and certificates based upon TLS SNI from client.
548 Also option tls_sni on SMTP Transports. Also clear $tls_bits correctly
549 before an outbound SMTP session. New log_selector, +tls_sni.
551 PP/18 Bugzilla 1122 - check localhost_number expansion for failure, avoid
552 NULL dereference. Report and patch from Alun Jones.
554 PP/19 DNS resolver init changes for NetBSD compatibility. (Risk of breakage
555 on less well tested platforms). Obviates NetBSD pkgsrc patch-ac.
556 Not seeing resolver debug output on NetBSD, but suspect this is a
557 resolver implementation change.
559 PP/20 Revert part of NM/04, it broke log_path containing %D expansions.
560 Left warnings. Added "eximon gdb" invocation mode.
562 PP/21 Defaulting "accept_8bitmime" to true, not false.
564 PP/22 Added -bw for inetd wait mode support.
566 PP/23 Added PCRE_CONFIG=yes support to Makefile for using pcre-config to
567 locate the relevant includes and libraries. Made this the default.
569 PP/24 Fixed headers_only on smtp transports (was not sending trailing dot).
570 Bugzilla 1246, report and most of solution from Tomasz Kusy.
572 JH/03 ${eval } now uses 64-bit and supports a "g" suffix (like to "k" and "m").
573 This may cause build issues on older platforms.
575 PP/25 Revamped GnuTLS support, passing tls_require_ciphers to
576 gnutls_priority_init, ignoring Exim options gnutls_require_kx,
577 gnutls_require_mac & gnutls_require_protocols (no longer supported).
578 Added SNI support via GnuTLS too.
579 Made ${randint:..} supplier available, if using not-too-old GnuTLS.
581 PP/26 Added EXPERIMENTAL_OCSP for OpenSSL.
583 PP/27 Applied dnsdb SPF support patch from Janne Snabb.
584 Applied second patch from Janne, implementing suggestion to default
585 multiple-strings-in-record handling to match SPF spec.
587 JH/04 Added expansion variable $tod_epoch_l for a higher-precision time.
589 PP/28 Fix DCC dcc_header content corruption (stack memory referenced,
590 read-only, out of scope).
591 Patch from Wolfgang Breyha, report from Stuart Northfield.
593 PP/29 Fix three issues highlighted by clang analyser static analysis.
594 Only crash-plausible issue would require the Cambridge-specific
595 iplookup router and a misconfiguration.
596 Report from Marcin Mirosław.
598 PP/30 Another attempt to deal with PCRE_PRERELEASE, this one less buggy.
600 PP/31 %D in printf continues to cause issues (-Wformat=security), so for
601 now guard some of the printf checks behind WANT_DEEPER_PRINTF_CHECKS.
602 As part of this, removing so much warning spew let me fix some minor
603 real issues in debug logging.
605 PP/32 GnuTLS was always using default tls_require_ciphers, due to a missing
606 assignment on my part. Fixed.
608 PP/33 Added tls_dh_max_bits option, defaulting to current hard-coded limit
609 of NSS, for GnuTLS/NSS interop. Problem root cause diagnosis by
610 Janne Snabb (who went above and beyond: thank you).
612 PP/34 Validate tls_require_ciphers on startup, since debugging an invalid
613 string otherwise requires a connection and a bunch more work and it's
614 relatively easy to get wrong. Should also expose TLS library linkage
617 PP/35 Pull in <features.h> on Linux, for some portability edge-cases of
618 64-bit ${eval} (JH/03).
620 PP/36 Define _GNU_SOURCE in exim.h; it's needed for some releases of
621 GNU libc to support some of the 64-bit stuff, should not lead to
622 conflicts. Defined before os.h is pulled in, so if a given platform
623 needs to override this, it can.
625 PP/37 Unbreak Cyrus SASL auth: SSF retrieval was incorrect, Exim thought
626 protection layer was required, which is not implemented.
627 Bugzilla 1254, patch from Wolfgang Breyha.
629 PP/38 Overhaul DH prime handling, supply RFC-specified DH primes as built
630 into Exim, default to IKE id 23 from RFC 5114 (2048 bit). Make
631 tls_dhparam take prime identifiers. Also unbreak combination of
632 OpenSSL+DH_params+TLSSNI.
634 PP/39 Disable SSLv2 by default in OpenSSL support.
640 PP/01 Solaris build fix for Oracle's LDAP libraries.
641 Bugzilla 1109, patch from Stephen Usher.
643 TF/01 HP/UX build fix: avoid arithmetic on a void pointer.
645 TK/01 DKIM Verification: Fix relaxed canon for empty headers w/o
648 TF/02 Fix a couple more cases where we did not log the error message
649 when unlink() failed. See also change 4.74-TF/03.
651 TF/03 Make the exiwhat support code safe for signals. Previously Exim might
652 lock up or crash if it happened to be inside a call to libc when it
653 got a SIGUSR1 from exiwhat.
655 The SIGUSR1 handler appends the current process status to the process
656 log which is later printed by exiwhat. It used to use the general
657 purpose logging code to do this, but several functions it calls are
658 not safe for signals.
660 The new output code in the SIGUSR1 handler is specific to the process
661 log, and simple enough that it's easy to inspect for signal safety.
662 Removing some special cases also simplifies the general logging code.
663 Removing the spurious timestamps from the process log simplifies
666 TF/04 Improved ratelimit ACL condition.
668 The /noupdate option has been deprecated in favour of /readonly which
669 has clearer semantics. The /leaky, /strict, and /readonly update modes
670 are mutually exclusive. The update mode is no longer included in the
671 database key; it just determines when the database is updated. (This
672 means that when you upgrde Exim will forget old rate measurements.)
674 Exim now checks that the per_* options are used with an update mode that
675 makes sense for the current ACL. For example, when Exim is processing a
676 message (e.g. acl_smtp_rcpt or acl_smtp_data, etc.) you can specify
677 per_mail/leaky or per_mail/strict; otherwise (e.g. in acl_smtp_helo) you
678 must specify per_mail/readonly. If you omit the update mode it defaults to
679 /leaky where that makes sense (as before) or /readonly where required.
681 The /noupdate option is now undocumented but still supported for
682 backwards compatibility. It is equivalent to /readonly except that in
683 ACLs where /readonly is required you may specify /leaky/noupdate or
684 /strict/noupdate which are treated the same as /readonly.
686 A useful new feature is the /count= option. This is a generalization
687 of the per_byte option, so that you can measure the throughput of other
688 aggregate values. For example, the per_byte option is now equivalent
689 to per_mail/count=${if >{0}{$message_size} {0} {$message_size} }.
691 The per_rcpt option has been generalized using the /count= mechanism
692 (though it's more complicated than the per_byte equivalence). When it is
693 used in acl_smtp_rcpt, the per_rcpt option adds recipients to the
694 measured rate one at a time; if it is used later (e.g. in acl_smtp_data)
695 or in a non-SMTP ACL it adds all the recipients in one go. (The latter
696 /count=$recipients_count behaviour used to work only in non-SMTP ACLs.)
697 Note that using per_rcpt with a non-readonly update mode in more than
698 one ACL will cause the recipients to be double-counted. (The per_mail
699 and per_byte options don't have this problem.)
701 The handling of very low rates has changed slightly. If the computed rate
702 is less than the event's count (usually one) then this event is the first
703 after a long gap. In this case the rate is set to the same as this event's
704 count, so that the first message of a spam run is counted properly.
706 The major new feature is a mechanism for counting the rate of unique
707 events. The new per_addr option counts the number of different
708 recipients that someone has sent messages to in the last time period. It
709 behaves like per_rcpt if all the recipient addresses are different, but
710 duplicate recipient addresses do not increase the measured rate. Like
711 the /count= option this is a general mechanism, so the per_addr option
712 is equivalent to per_rcpt/unique=$local_part@$domain. You can, for
713 example, measure the rate that a client uses different sender addresses
714 with the options per_mail/unique=$sender_address. There are further
715 details in the main documentation.
717 TF/05 Removed obsolete $Cambridge$ CVS revision strings.
719 TF/06 Removed a few PCRE remnants.
721 TF/07 Automatically extract Exim's version number from tags in the git
722 repository when doing development or release builds.
724 PP/02 Raise smtp_cmd_buffer_size to 16kB.
725 Bugzilla 879. Patch from Paul Fisher.
727 PP/03 Implement SSL-on-connect outbound with protocol=smtps on smtp transport.
728 Heavily based on revision 40f9a89a from Simon Arlott's tree.
731 PP/04 Use .dylib instead of .so for dynamic library loading on MacOS.
733 PP/05 Variable $av_failed, true if the AV scanner deferred.
734 Bugzilla 1078. Patch from John Horne.
736 PP/06 Stop make process more reliably on build failure.
737 Bugzilla 1087. Patch from Heiko Schlittermann.
739 PP/07 Make maildir_use_size_file an _expandable_ boolean.
740 Bugzilla 1089. Patch from Heiko Schlittermann.
742 PP/08 Handle ${run} returning more data than OS pipe buffer size.
743 Bugzilla 1131. Patch from Holger Weiß.
745 PP/09 Handle IPv6 addresses with SPF.
746 Bugzilla 860. Patch from Wolfgang Breyha.
748 PP/10 GnuTLS: support TLS 1.2 & 1.1.
750 Use gnutls_certificate_verify_peers2() [patch from Andreas Metzler].
753 PP/11 match_* no longer expand right-hand-side by default.
754 New compile-time build option, EXPAND_LISTMATCH_RHS.
755 New expansion conditions, "inlist", "inlisti".
757 PP/12 fix uninitialised greeting string from PP/03 (smtps client support).
759 PP/13 shell and compiler warnings fixes for RC1-RC4 changes.
761 PP/14 fix log_write() format string regression from TF/03.
762 Bugzilla 1152. Patch from Dmitry Isaikin.
768 PP/01 The new ldap_require_cert option would segfault if used. Fixed.
770 PP/02 Harmonised TLS library version reporting; only show if debugging.
771 Layout now matches that introduced for other libraries in 4.74 PP/03.
773 PP/03 New openssl_options items: no_sslv2 no_sslv3 no_ticket no_tlsv1
775 PP/04 New "dns_use_edns0" global option.
777 PP/05 Don't segfault on misconfiguration of ref:name exim-user as uid.
780 PP/06 Extra paranoia around buffer usage at the STARTTLS transition.
781 nb: Exim is not vulnerable to http://www.kb.cert.org/vuls/id/555316
783 TK/01 Updated PolarSSL code to 0.14.2.
784 Bugzilla 1097. Patch from Andreas Metzler.
786 PP/07 Catch divide-by-zero in ${eval:...}.
789 PP/08 Condition negation of bool{}/bool_lax{} did not negate. Fixed.
792 TK/02 Bugzilla 1106: CVE-2011-1764 - DKIM log line was subject to a
793 format-string attack -- SECURITY: remote arbitrary code execution.
795 TK/03 SECURITY - DKIM signature header parsing was double-expanded, second
796 time unintentionally subject to list matching rules, letting the header
797 cause arbitrary Exim lookups (of items which can occur in lists, *not*
798 arbitrary string expansion). This allowed for information disclosure.
800 PP/09 Fix another SIGFPE (x86) in ${eval:...} expansion, this time related to
801 INT_MIN/-1 -- value coerced to INT_MAX.
807 NM/01 Workround for PCRE version dependency in version reporting
810 TF/01 Update valgrind.h and memcheck.h to copies from valgrind-3.6.0.
811 This fixes portability to compilers other than gcc, notably
812 Solaris CC and HP-UX CC. Fixes Bugzilla 1050.
814 TF/02 Bugzilla 139: Avoid using the += operator in the modular lookup
815 makefiles for portability to HP-UX and POSIX correctness.
817 PP/01 Permit LOOKUP_foo enabling on the make command-line.
818 Also via indented variable definition in the Makefile.
819 (Debugging by Oliver Heesakkers).
821 PP/02 Restore caching of spamd results with expanded spamd_address.
822 Patch from author of expandable spamd_address patch, Wolfgang Breyha.
824 PP/03 Build issue: lookups-Makefile now exports LC_ALL=C
825 Improves build reliability. Fix from: Frank Elsner
827 NM/02 Fix wide character breakage in the rfc2047 coding
828 Fixes bug 1064. Patch from Andrey N. Oktyabrski
830 NM/03 Allow underscore in dnslist lookups
831 Fixes bug 1026. Patch from Graeme Fowler
833 PP/04 Bugzilla 230: Support TLS-enabled LDAP (in addition to ldaps).
834 Code patches from Adam Ciarcinski of NetBSD.
836 NM/04 Fixed exiqgrep to cope with mailq missing size issue
839 PP/05 Bugzilla 1083: when lookup expansion defers, escape the output which
840 is logged, to avoid truncation. Patch from John Horne.
842 PP/06 Bugzilla 1042: implement freeze_signal on pipe transports.
843 Patch from Jakob Hirsch.
845 PP/07 Bugzilla 1061: restrict error messages sent over SMTP to not reveal
846 SQL string expansion failure details.
847 Patch from Andrey Oktyabrski.
849 PP/08 Bugzilla 486: implement %M datestamping in log filenames.
850 Patch from Simon Arlott.
852 PP/09 New lookups functionality failed to compile on old gcc which rejects
853 extern declarations in function scope.
854 Patch from Oliver Fleischmann
856 PP/10 Use sig_atomic_t for flags set from signal handlers.
857 Check getgroups() return and improve debugging.
858 Fixed developed for diagnosis in bug 927 (which turned out to be
861 PP/11 Bugzilla 1055: Update $message_linecount for maildir_tag.
862 Patch from Mark Zealey.
864 PP/12 Bugzilla 1056: Improved spamd server selection.
865 Patch from Mark Zealey.
867 PP/13 Bugzilla 1086: Deal with maildir quota file races.
868 Based on patch from Heiko Schlittermann.
870 PP/14 Bugzilla 1019: DKIM multiple signature generation fix.
871 Patch from Uwe Doering, sign-off by Michael Haardt.
873 NM/05 Fix to spam.c to accommodate older gcc versions which dislike
874 variable declaration deep within a block. Bug and patch from
877 PP/15 lookups-Makefile IRIX compatibilty coercion.
879 PP/16 Make DISABLE_DKIM build knob functional.
881 NM/06 Bugzilla 968: child_open_uid: restore default SIGPIPE handler
882 Patch by Simon Arlott
884 TF/03 Fix valgrind.h portability to C89 compilers that do not support
885 variable argument macros. Our copy now differs from upstream.
891 TF/01 Failure to get a lock on a hints database can have serious
892 consequences so log it to the panic log.
894 TF/02 Log LMTP confirmation messages in the same way as SMTP,
895 controlled using the smtp_confirmation log selector.
897 TF/03 Include the error message when we fail to unlink a spool file.
899 DW/01 Bugzilla 139: Support dynamically loaded lookups as modules.
900 With thanks to Steve Haslam, Johannes Berg & Serge Demonchaux
901 for maintaining out-of-tree patches for some time.
903 PP/01 Bugzilla 139: Documentation and portability issues.
904 Avoid GNU Makefile-isms, let Exim continue to build on BSD.
905 Handle per-OS dynamic-module compilation flags.
907 PP/02 Let /dev/null have normal permissions.
908 The 4.73 fixes were a little too stringent and complained about the
909 permissions on /dev/null. Exempt it from some checks.
910 Reported by Andreas M. Kirchwitz.
912 PP/03 Report version information for many libraries, including
913 Exim version information for dynamically loaded libraries. Created
914 version.h, now support a version extension string for distributors
915 who patch heavily. Dynamic module ABI change.
917 PP/04 CVE-2011-0017 - check return value of setuid/setgid. This is a
918 privilege escalation vulnerability whereby the Exim run-time user
919 can cause root to append content of the attacker's choosing to
922 PP/05 Bugzilla 1041: merged DCC maintainer's fixes for return code.
925 PP/06 Bugzilla 1071: fix delivery logging with untrusted macros.
926 If dropping privileges for untrusted macros, we disabled normal logging
927 on the basis that it would fail; for the Exim run-time user, this is not
928 the case, and it resulted in successful deliveries going unlogged.
929 Fixed. Reported by Andreas Metzler.
935 PP/01 Date: & Message-Id: revert to normally being appended to a message,
936 only prepend for the Resent-* case. Fixes regression introduced in
937 Exim 4.70 by NM/22 for Bugzilla 607.
939 PP/02 Include check_rfc2047_length in configure.default because we're seeing
940 increasing numbers of administrators be bitten by this.
942 JJ/01 Added DISABLE_DKIM and comment to src/EDITME
944 PP/03 Bugzilla 994: added openssl_options main configuration option.
946 PP/04 Bugzilla 995: provide better SSL diagnostics on failed reads.
948 PP/05 Bugzilla 834: provide a permit_coredump option for pipe transports.
950 PP/06 Adjust NTLM authentication to handle SASL Initial Response.
952 PP/07 If TLS negotiated an anonymous cipher, we could end up with SSL but
953 without a peer certificate, leading to a segfault because of an
954 assumption that peers always have certificates. Be a little more
955 paranoid. Problem reported by Martin Tscholak.
957 PP/08 Bugzilla 926: switch ClamAV to use the new zINSTREAM API for content
958 filtering; old API available if built with WITH_OLD_CLAMAV_STREAM=yes
959 NB: ClamAV planning to remove STREAM in "middle of 2010".
960 CL also introduces -bmalware, various -d+acl logging additions and
961 more caution in buffer sizes.
963 PP/09 Implemented reverse_ip expansion operator.
965 PP/10 Bugzilla 937: provide a "debug" ACL control.
967 PP/11 Bugzilla 922: Documentation dusting, patch provided by John Horne.
969 PP/12 Bugzilla 973: Implement --version.
971 PP/13 Bugzilla 752: Refuse to build/run if Exim user is root/0.
973 PP/14 Build without WITH_CONTENT_SCAN. Path from Andreas Metzler.
975 PP/15 Bugzilla 816: support multiple condition rules on Routers.
977 PP/16 Add bool_lax{} expansion operator and use that for combining multiple
978 condition rules, instead of bool{}. Make both bool{} and bool_lax{}
979 ignore trailing whitespace.
981 JJ/02 prevent non-panic DKIM error from being sent to paniclog
983 JJ/03 added tcp_wrappers_daemon_name to allow host entries other than
986 PP/17 Fix malware regression for cmdline scanner introduced in PP/08.
987 Notification from Dr Andrew Aitchison.
989 PP/18 Change ClamAV response parsing to be more robust and to handle ClamAV's
990 ExtendedDetectionInfo response format.
991 Notification from John Horne.
993 PP/19 OpenSSL 1.0.0a compatibility const-ness change, should be backwards
996 PP/20 Added a CONTRIBUTING file. Fixed the documentation build to use http:
997 XSL and documented dependency on system catalogs, with examples of how
1000 DW/21 Added Valgrind hooks in store.c to help it capture out-of-bounds store
1003 DW/22 Bugzilla 1044: CVE-2010-4345 - partial fix: restrict default behaviour
1004 of CONFIGURE_OWNER and CONFIGURE_GROUP options to no longer allow a
1005 configuration file which is writeable by the Exim user or group.
1007 DW/23 Bugzilla 1044: CVE-2010-4345 - part two: extend checks for writeability
1008 of configuration files to cover files specified with the -C option if
1009 they are going to be used with root privileges, not just the default
1012 DW/24 Bugzilla 1044: CVE-2010-4345 - part three: remove ALT_CONFIG_ROOT_ONLY
1013 option (effectively making it always true).
1015 DW/25 Add TRUSTED_CONFIG_PREFIX_FILE option to allow alternative configuration
1016 files to be used while preserving root privileges.
1018 DW/26 Set FD_CLOEXEC on SMTP sockets after forking in the daemon, to ensure
1019 that rogue child processes cannot use them.
1021 PP/27 Bugzilla 1047: change the default for system_filter_user to be the Exim
1022 run-time user, instead of root.
1024 PP/28 Add WHITELIST_D_MACROS option to let some macros be overridden by the
1025 Exim run-time user without dropping privileges.
1027 DW/29 Remove use of va_copy() which breaks pre-C99 systems. Duplicate the
1028 result string, instead of calling string_vformat() twice with the same
1031 DW/30 Allow TRUSTED_CONFIG_PREFIX_FILE only for Exim or CONFIGURE_OWNER, not
1032 for other users. Others should always drop root privileges if they use
1033 -C on the command line, even for a whitelisted configure file.
1035 DW/31 Turn TRUSTED_CONFIG_PREFIX_FILE into TRUSTED_CONFIG_FILE. No prefixes.
1037 NM/01 Fixed bug #1002 - Message loss when using multiple deliveries
1043 JJ/01 installed exipick 20100104.1, adding $max_received_linelength,
1044 $data_path, and $header_path variables; fixed documentation bugs and
1047 JJ/02 installed exipick 20100222.0, added --input-dir and --finput to allow
1048 exipick to access non-standard spools, including the "frozen" queue
1051 NM/01 Bugzilla 965: Support mysql stored procedures.
1052 Patch from Alain Williams
1054 NM/02 Bugzilla 961: Spacing fix (syntax error) on Makefile directives for NetBSD
1056 NM/03 Bugzilla 955: Documentation fix for max_rcpts.
1057 Patch from Andreas Metzler
1059 NM/04 Bugzilla 954: Fix for unknown responses from Dovecot authenticator.
1060 Patch from Kirill Miazine
1062 NM/05 Bugzilla 671: Added umask to procmail example.
1064 JJ/03 installed exipick 20100323.0, fixing doc bug
1066 NM/06 Bugzilla 988: CVE-2010-2023 - prevent hardlink attack on sticky mail
1067 directory. Notification and patch from Dan Rosenberg.
1069 TK/01 PDKIM: Upgrade PolarSSL files to upstream version 0.12.1.
1071 TK/02 Improve log output when DKIM signing operation fails.
1073 MH/01 Treat the transport option dkim_domain as a colon separated
1074 list, not as a single string, and sign the message with each element,
1075 omitting multiple occurences of the same signer.
1077 NM/07 Null terminate DKIM strings, Null initialise DKIM variable
1078 Bugzilla 985, 986. Patch by Simon Arlott
1080 NM/08 Bugzilla 967. dnsdb DNS TXT record bug fix (DKIM-related)
1081 Patch by Simon Arlott
1083 PP/01 Bugzilla 989: CVE-2010-2024 - work round race condition on
1084 MBX locking. Notification from Dan Rosenberg.
1090 TK/01 Bugzilla 912: Fix DKIM segfault on empty headers/body.
1092 NM/01 Bugzilla 913: Documentation fix for gnutls_* options.
1094 NM/02 Bugzilla 722: Documentation for randint. Better randomness defaults.
1096 NM/03 Bugzilla 847: Enable DNSDB lookup by default.
1098 NM/04 Bugzilla 915: Flag broken perl installation during build.
1104 TK/01 Added patch by Johannes Berg that expands the main option
1105 "spamd_address" if it starts with a dollar sign.
1107 TK/02 Write list of recipients to X-Envelope-Sender header when building
1108 the mbox-format spool file for content scanning (suggested by Jakob
1111 TK/03 Added patch by Wolfgang Breyha that adds experimental DCC
1112 (http://www.dcc-servers.net/) support via dccifd. Activated by
1113 setting EXPERIMENTAL_DCC=yes in Local/Makefile.
1115 TK/04 Bugzilla 673: Add f-protd malware scanner support. Patch submitted
1116 by Mark Daniel Reidel <mr@df.eu>.
1118 NM/01 Bugzilla 657: Embedded PCRE removed from the exim source tree.
1119 When building exim an external PCRE library is now needed -
1120 PCRE is a system library on the majority of modern systems.
1121 See entry on PCRE_LIBS in EDITME file.
1123 NM/02 Bugzilla 646: Removed unwanted C/R in Dovecot authenticator
1124 conversation. Added nologin parameter to request.
1125 Patch contributed by Kirill Miazine.
1127 TF/01 Do not log submission mode rewrites if they do not change the address.
1129 TF/02 Bugzilla 662: Fix stack corruption before exec() in daemon.c.
1131 NM/03 Bugzilla 602: exicyclog now handles panic log, and creates empty
1132 log files in place. Contributed by Roberto Lima.
1134 NM/04 Bugzilla 667: Close socket used by dovecot authenticator.
1136 TF/03 Bugzilla 615: When checking the local_parts router precondition
1137 after a local_part_suffix or local_part_prefix option, Exim now
1138 does not use the address's named list lookup cache, since this
1139 contains cached lookups for the whole local part.
1141 NM/05 Bugzilla 521: Integrated SPF Best Guess support contributed by
1142 Robert Millan. Documentation is in experimental-spec.txt.
1144 TF/04 Bugzilla 668: Fix parallel build (make -j).
1146 NM/05.2 Bugzilla 437: Prevent Maildir aux files being created with mode 000.
1148 NM/05.3 Bugzilla 598: Improvement to Dovecot authenticator handling.
1149 Patch provided by Jan Srzednicki.
1151 TF/05 Leading white space used to be stripped from $spam_report which
1152 wrecked the formatting. Now it is preserved.
1154 TF/06 Save $spam_score, $spam_bar, and $spam_report in spool files, so
1155 that they are available at delivery time.
1157 TF/07 Fix the way ${extract is skipped in the untaken branch of a conditional.
1159 TF/08 TLS error reporting now respects the incoming_interface and
1160 incoming_port log selectors.
1162 TF/09 Produce a more useful error message if an SMTP transport's hosts
1163 setting expands to an empty string.
1165 NM/06 Bugzilla 744: EXPN did not work under TLS.
1166 Patch provided by Phil Pennock.
1168 NM/07 Bugzilla 769: Extraneous comma in usage fprintf
1169 Patch provided by Richard Godbee.
1171 NM/08 Fixed erroneous documentation references to smtp_notquit_acl to be
1172 acl_smtp_notquit, added index entry.
1174 NM/09 Bugzilla 787: Potential buffer overflow in string_format.
1175 Patch provided by Eugene Bujak.
1177 NM/10 Bugzilla 770: Problem on some platforms modifying the len parameter to
1178 accept(). Patch provided by Maxim Dounin.
1180 NM/11 Bugzilla 749: Preserve old behaviour of blanks comparing equal to zero.
1181 Patch provided by Phil Pennock.
1183 NM/12 Bugzilla 497: Correct behaviour of exiwhat when no config exists.
1185 NM/13 Bugzilla 590: Correct handling of Resent-Date headers.
1186 Patch provided by Brad "anomie" Jorsch.
1188 NM/14 Bugzilla 622: Added timeout setting to transport filter.
1189 Patch provided by Dean Brooks.
1191 TK/05 Add native DKIM support (does not depend on external libraries).
1193 NM/15 Bugzilla 854: Removed code that symlinks to pcre as its no longer useful.
1194 Patch provided by Graeme Fowler.
1196 NM/16 Bugzilla 851: Documentation example syntax fix.
1198 NM/17 Changed NOTICE file to remove references to embedded PCRE.
1200 NM/18 Bugzilla 894: Fix issue with very long lines including comments in
1203 NM/19 Bugzilla 745: TLS version reporting.
1204 Patch provided by Phil Pennock.
1206 NM/20 Bugzilla 167: bool: condition support.
1207 Patch provided by Phil Pennock.
1209 NM/21 Bugzilla 665: gnutls_compat_mode to allow compatibility with broken
1210 clients. Patch provided by Phil Pennock.
1212 NM/22 Bugzilla 607: prepend (not append) Resent-Message-ID and Resent-Date.
1213 Patch provided by Brad "anomie" Jorsch.
1215 NM/23 Bugzilla 687: Fix misparses in eximstats.
1216 Patch provided by Heiko Schlittermann.
1218 NM/24 Bugzilla 688: Fix exiwhat to handle log_selector = +pid.
1219 Patch provided by Heiko Schlittermann.
1221 NM/25 Bugzilla 727: Use transport mode as default mode for maildirsize file.
1222 plus update to original patch.
1224 NM/26 Bugzilla 799: Documentation correction for ratelimit.
1226 NM/27 Bugzilla 802: Improvements to local interface IP addr detection.
1227 Patch provided by David Brownlee.
1229 NM/28 Bugzilla 807: Improvements to LMTP delivery logging.
1231 NM/29 Bugzilla 862, 866, 875: Documentation bugfixes.
1233 NM/30 Bugzilla 888: TLS documentation bugfixes.
1235 NM/31 Bugzilla 896: Dovecot buffer overrun fix.
1237 NM/32 Bugzilla 889: Change all instances of "expr" in shell scripts to "expr --"
1238 Unlike the original bugzilla I have changed all shell scripts in src tree.
1240 NM/33 Bugzilla 898: Transport filter timeout fix.
1241 Patch by Todd Rinaldo.
1243 NM/34 Bugzilla 901: Fix sign/unsigned and UTF mismatches.
1244 Patch by Serge Demonchaux.
1246 NM/35 Bugzilla 39: Base64 decode bug fixes.
1247 Patch by Jakob Hirsch.
1249 NM/36 Bugzilla 909: Correct connect() call in dcc code.
1251 NM/37 Bugzilla 910: Correct issue with relaxed/simple handling.
1253 NM/38 Bugzilla 908: Removed NetBSD3 support as no longer needed.
1255 NM/39 Bugzilla 911: Fixed MakeLinks build script.
1261 TK/01 Add preliminary DKIM support. Currently requires a forked version of
1262 ALT-N's libdkim that I have put here:
1263 http://duncanthrax.net/exim-experimental/
1265 Note to Michael Haardt: I had to rename some vars in sieve.c. They
1266 were called 'true' and it seems that C99 defines that as a reserved
1267 keyword to be used with 'bool' variable types. That means you could
1268 not include C99-style headers which use bools without triggering
1269 build errors in sieve.c.
1271 NM/01 Bugzilla 592: --help option is handled incorrectly if exim is invoked
1272 as mailq or other aliases. Changed the --help handling significantly
1273 to do whats expected. exim_usage() emits usage/help information.
1275 SC/01 Added the -bylocaldomain option to eximstats.
1277 NM/02 Bugzilla 619: Defended against bad data coming back from gethostbyaddr.
1279 NM/03 Bugzilla 613: Documentation fix for acl_not_smtp.
1281 NM/04 Bugzilla 628: PCRE update to 7.4 (work done by John Hall).
1287 PH/01 Another patch from the Sieve maintainer.
1289 PH/02 When an IPv6 address is converted to a string for single-key lookup
1290 in an address list (e.g. for an item such as "net24-dbm;/net/works"),
1291 dots are used instead of colons so that keys in lsearch files need not
1292 contain colons. This was done some time before quoting was made available
1293 in lsearch files. However, iplsearch files do require colons in IPv6 keys
1294 (notated using the quote facility) so as to distinguish them from IPv4
1295 keys. This meant that lookups for IP addresses in host lists did not work
1296 for iplsearch lookups.
1298 This has been fixed by arranging for IPv6 addresses to be expressed with
1299 colons if the lookup type is iplsearch. This is not incompatible, because
1300 previously such lookups could never work.
1302 The situation is now rather anomolous, since one *can* have colons in
1303 ordinary lsearch keys. However, making the change in all cases is
1304 incompatible and would probably break a number of configurations.
1306 TK/01 Change PRVS address formatting scheme to reflect latests BATV draft
1309 MH/01 The "spam" ACL condition code contained a sscanf() call with a %s
1310 conversion specification without a maximum field width, thereby enabling
1311 a rogue spamd server to cause a buffer overflow. While nobody in their
1312 right mind would setup Exim to query an untrusted spamd server, an
1313 attacker that gains access to a server running spamd could potentially
1314 exploit this vulnerability to run arbitrary code as the Exim user.
1316 TK/02 Bugzilla 502: Apply patch to make the SPF-Received: header use
1317 $primary_hostname instead of what libspf2 thinks the hosts name is.
1319 MH/02 The dsearch lookup now uses lstat(2) instead of stat(2) to look for
1320 a directory entry by the name of the lookup key. Previously, if a
1321 symlink pointed to a non-existing file or a file in a directory that
1322 Exim lacked permissions to read, a lookup for a key matching that
1323 symlink would fail. Now it is enough that a matching directory entry
1324 exists, symlink or not. (Bugzilla 503.)
1326 PH/03 The body_linecount and body_zerocount variables are now exported in the
1329 PH/04 Added the $dnslist_matched variable.
1331 PH/05 Unset $tls_cipher and $tls_peerdn before making a connection as a client.
1332 This means they are set thereafter only if the connection becomes
1335 PH/06 Added the client_condition to authenticators so that some can be skipped
1336 by clients under certain conditions.
1338 PH/07 The error message for a badly-placed control=no_multiline_responses left
1339 "_responses" off the end of the name.
1341 PH/08 Added -Mvc to output a copy of a message in RFC 2822 format.
1343 PH/09 Tidied the code for creating ratelimiting keys, creating them explicitly
1344 (without spaces) instead of just copying the configuration text.
1346 PH/10 Added the /noupdate option to the ratelimit ACL condition.
1348 PH/11 Added $max_received_linelength.
1350 PH/12 Added +ignore_defer and +include_defer to host lists.
1352 PH/13 Installed PCRE version 7.2. This needed some changes because of the new
1353 way in which PCRE > 7.0 is built.
1355 PH/14 Implemented queue_only_load_latch.
1357 PH/15 Removed an incorrect (int) cast when reading the value of SIZE in a
1358 MAIL command. The effect was to mangle the value on 64-bit systems.
1360 PH/16 Another patch from the Sieve maintainer.
1362 PH/17 Added the NOTQUIT ACL, based on a patch from Ted Cooper.
1364 PH/18 If a system quota error occurred while trying to create the file for
1365 a maildir delivery, the message "Mailbox is full" was not appended to the
1366 bounce if the delivery eventually timed out. Change 4.67/27 below applied
1367 only to a quota excession during the actual writing of the file.
1369 PH/19 It seems that peer DN values may contain newlines (and other non-printing
1370 characters?) which causes problems in log lines. The DN values are now
1371 passed through string_printing() before being added to log lines.
1373 PH/20 Added the "servers=" facility to MySQL and PostgreSQL lookups. (Oracle
1374 and InterBase are left for another time.)
1376 PH/21 Added message_body_newlines option.
1378 PH/22 Guard against possible overflow in moan_check_errorcopy().
1380 PH/23 POSIX allows open() to be a macro; guard against that.
1382 PH/24 If the recipient of an error message contained an @ in the local part
1383 (suitably quoted, of course), incorrect values were put in $domain and
1384 $local_part during the evaluation of errors_copy.
1390 MH/01 Fix for bug #448, segfault in Dovecot authenticator when interface_address
1391 is unset (happens when testing with -bh and -oMi isn't used). Thanks to
1394 PH/01 Added a new log selector smtp_no_mail, to log SMTP sessions that do not
1395 issue a MAIL command.
1397 PH/02 In an ACL statement such as
1399 deny dnslists = X!=127.0.0.2 : X=127.0.0.2
1401 if a client was not listed at all, or was listed with a value other than
1402 127.0.0.2, in the X list, but was listed with 127.0.0.2 in the Y list,
1403 the condition was not true (as it should be), so access was not denied.
1404 The bug was that the ! inversion was incorrectly passed on to the second
1405 item. This has been fixed.
1407 PH/03 Added additional dnslists conditions == and =& which are different from
1408 = and & when the dns lookup returns more than one IP address.
1410 PH/04 Added gnutls_require_{kx,mac,protocols} to give more control over the
1411 cipher suites used by GnuTLS. These options are ignored by OpenSSL.
1413 PH/05 After discussion on the list, added a compile time option ENABLE_DISABLE_
1414 FSYNC, which compiles an option called disable_fsync that allows for
1415 bypassing fsync(). The documentation is heavily laced with warnings.
1417 SC/01 Updated eximstats to collate all SpamAssassin rejects into one bucket.
1419 PH/06 Some tidies to the infrastructure of the Test Suite that is concerned
1420 with the auxiliary C programs that it uses: (1) Arrange for BIND_8_COMPAT
1421 to be defined when compiling on OSX (Darwin); (2) Tidies to the Makefile,
1422 including adding "make clean"; (3) Added -fPIC when compiling the test
1423 dynamically loaded module, to get rid of a warning.
1425 MH/02 Fix for bug #451, causing paniclog entries to be written if a bounce
1426 message fails, move_frozen_messages = true and ignore_bounce_errors_after
1427 = 0s. The bug is otherwise harmless.
1429 PH/07 There was a bug in the dovecot authenticator such that the value of
1430 $auth1 could be overwritten, and so not correctly preserved, after a
1431 successful authentication. This usually meant that the value preserved by
1432 the server_setid option was incorrect.
1434 PH/08 Added $smtp_count_at_connection_start, deliberately with a long name.
1436 PH/09 Installed PCRE release 7.0.
1438 PH/10 The acl_not_smtp_start ACL was, contrary to the documentation, not being
1439 run for batched SMTP input. It is now run at the start of every message
1440 in the batch. While fixing this I discovered that the process information
1441 (output by running exiwhat) was not always getting set for -bs and -bS
1442 input. This is fixed, and it now also says "batched" for BSMTP.
1444 PH/11 Added control=no_pipelining.
1446 PH/12 Added $sending_ip_address and $sending_port (mostly Magnus Holmgren's
1447 patch, slightly modified), and move the expansion of helo_data till after
1448 the connection is made in the smtp transport (so it can use these
1451 PH/13 Added ${rfc2047d: to decoded RFC 2047 strings.
1453 PH/14 Added log_selector = +pid.
1455 PH/15 Flush SMTP output before delaying, unless control=no_delay_flush is set.
1457 PH/16 Add ${if forany and ${if forall.
1459 PH/17 Added dsn_from option to vary the From: line in DSNs.
1461 PH/18 Flush SMTP output before performing a callout, unless control =
1462 no_callout_flush is set.
1464 PH/19 Change 4.64/PH/36 introduced a bug: when address_retry_include_sender
1465 was true (the default) a successful delivery failed to delete the retry
1466 item, thus causing premature timeout of the address. The bug is now
1469 PH/20 Added hosts_avoid_pipelining to the smtp transport.
1471 PH/21 Long custom messages for fakedefer and fakereject are now split up
1472 into multiline reponses in the same way that messages for "deny" and
1473 other ACL rejections are.
1475 PH/22 Applied Jori Hamalainen's speed-up changes and typo fixes to exigrep,
1476 with slight modification.
1478 PH/23 Applied sieve patches from the maintainer "tracking the latest notify
1479 draft, changing the syntax and factoring some duplicate code".
1481 PH/24 When the log selector "outgoing_port" was set, the port was shown as -1
1482 for deliveries of the second and subsequent messages over the same SMTP
1485 PH/25 Applied Magnus Holmgren's patch for ${addresses, ${map, ${filter, and
1486 ${reduce, with only minor "tidies".
1488 SC/02 Applied Daniel Tiefnig's patch to improve the '($parent) =' pattern match.
1490 PH/26 Added a "continue" ACL modifier that does nothing, for the benefit of its
1491 expansion side effects.
1493 PH/27 When a message times out after an over-quota error from an Exim-imposed
1494 quota, the bounce message says "mailbox is full". This message was not
1495 being given when it was a system quota that was exceeded. It now should
1498 MH/03 Made $recipients available in local_scan(). local_scan() already has
1499 better access to the recipient list through recipients_list[], but
1500 $recipients can be useful in postmaster-provided expansion strings.
1502 PH/28 The $smtp_command and $smtp_command_argument variables were not correct
1503 in the case of a MAIL command with additional options following the
1504 address, for example: MAIL FROM:<foo@bar> SIZE=1234. The option settings
1505 were accidentally chopped off.
1507 PH/29 SMTP synchronization checks are implemented when a command is read -
1508 there is a check that no more input is waiting when there shouldn't be
1509 any. However, for some commands, a delay in an ACL can mean that it is
1510 some time before the response is written. In this time, more input might
1511 arrive, invalidly. So now there are extra checks after an ACL has run for
1512 HELO/EHLO and after the predata ACL, and likewise for MAIL and RCPT when
1513 pipelining has not been advertised.
1515 PH/30 MH's patch to allow iscntrl() characters to be list separators.
1517 PH/31 Unlike :fail:, a custom message specified with :defer: was not being
1518 returned in the SMTP response when smtp_return_error_details was false.
1519 This has been fixed.
1521 PH/32 Change the Dovecot authenticator to use read() and write() on the socket
1522 instead of the C I/O that was originally supplied, because problems were
1523 reported on Solaris.
1525 PH/33 Compile failed with OpenSSL 0.9.8e. This was due to a coding error in
1526 Exim which did not show up earlier: it was assuming that a call to
1527 SSL_CTX_set_info_callback() might give an error value. In fact, there is
1528 no error. In previous releases of OpenSSL, SSL_CTX_set_info_callback()
1529 was a macro that became an assignment, so it seemed to work. This has
1530 changed to a proper function call with a void return, hence the compile
1531 error. Exim's code has been fixed.
1533 PH/34 Change HDA_SIZE in oracle.c from 256 to 512. This is needed for 64-bit
1536 PH/35 Applied a patch from the Sieve maintainer which fixes a bug in "notify".
1538 PH/36 Applied John Jetmore's patch to add -v functionality to exigrep.
1540 PH/37 If a message is not accepted after it has had an id assigned (e.g.
1541 because it turns out to be too big or there is a timeout) there is no
1542 "Completed" line in the log. When some messages of this type were
1543 selected by exigrep, they were listed as "not completed". Others were
1544 picked up by some special patterns. I have improved the selection
1545 criteria to be more general.
1547 PH/38 The host_find_failed option in the manualroute router can now be set
1548 to "ignore", to completely ignore a host whose IP address cannot be
1549 found. If all hosts are ignored, the behaviour is controlled by the new
1550 host_all_ignored option.
1552 PH/39 In a list of hosts for manualroute, if one item (either because of multi-
1553 homing or because of multiple MX records with /mx) generated more than
1554 one IP address, and the following item turned out to be the local host,
1555 all the secondary addresses of the first item were incorrectly removed
1556 from the list, along with the local host and any following hosts (which
1557 is what is supposed to happen).
1559 PH/40 When Exim receives a message, it writes the login name, uid, and gid of
1560 whoever called Exim into the -H file. In the case of the daemon it was
1561 behaving confusingly. When first started, it used values for whoever
1562 started the daemon, but after a SIGHUP it used the Exim user (because it
1563 calls itself on a restart). I have changed the code so that it now always
1566 PH/41 (Following a suggestion from Tony Finch) If all the RCPT commands in a
1567 message are rejected with the same error (e.g. no authentication or bad
1568 sender address), and a DATA command is nevertheless sent (as can happen
1569 with PIPELINING or a stupid MUA), the error message that was given to the
1570 RCPT commands is included in the rejection of the DATA command. This is
1571 intended to be helpful for MUAs that show only the final error to their
1574 PH/42 Another patch from the Sieve maintainer.
1576 SC/02 Eximstats - Differentiate between permanent and temporary rejects.
1577 Eximstats - Fixed some broken HTML links and added missing column headers
1579 Eximstats - Fixed Grand Total Summary Domains, Edomains, and Email
1580 columns for Rejects, Temp Rejects, Ham, and Spam rows.
1582 SC/03 Eximstats - V1.58 Fix to get <> and blackhole to show in edomain tables.
1584 PH/43 Yet another patch from the Sieve maintainer.
1586 PH/44 I found a way to check for a TCP/IP connection going away before sending
1587 the response to the final '.' that terminates a message, but only in the
1588 case where the client has not sent further data following the '.'
1589 (unfortunately, this is allowed). However, in many cases there won't be
1590 any further data because there won't be any more messages to send. A call
1591 to select() can be used: if it shows that the input is "ready", there is
1592 either input waiting, or the socket has been closed. An attempt to read
1593 the next input character can distinguish the two cases. Previously, Exim
1594 would have sent an OK response which the client would never have see.
1595 This could lead to message repetition. This fix should cure that, at
1596 least in a lot of common cases.
1598 PH/45 Do not advertise STARTTLS in response to HELP unless it would be
1599 advertised in response to EHLO.
1605 PH/01 Two more bugs that were introduced by 4.64/PH/07, in addition to the one
1606 fixed by 4.65/MH/01 (is this a record?) are fixed:
1608 (i) An empty string was always treated as zero by the numeric comparison
1609 operators. This behaviour has been restored.
1611 (ii) It is documented that the numeric comparison operators always treat
1612 their arguments as decimal numbers. This was broken in that numbers
1613 starting with 0 were being interpreted as octal.
1615 While fixing these problems I realized that there was another issue that
1616 hadn't been noticed. Values of message_size_limit (both the global option
1617 and the transport option) were treated as octal if they started with 0.
1618 The documentation was vague. These values are now always treated as
1619 decimal, and I will make that clear in the documentation.
1625 TK/01 Disable default definition of HAVE_LINUX_SENDFILE. Clashes with
1626 Linux large file support (_FILE_OFFSET_BITS=64) on older glibc
1629 MH/01 Don't check that the operands of numeric comparison operators are
1630 integers when their expansion is in "skipping" mode (fixes bug
1631 introduced by 4.64-PH/07).
1633 PH/01 If a system filter or a router generates more than SHRT_MAX (32767)
1634 child addresses, Exim now panics and dies. Previously, because the count
1635 is held in a short int, deliveries were likely to be lost. As such a
1636 large number of recipients for a single message is ridiculous
1637 (performance will be very, very poor), I have chosen to impose a limit
1638 rather than extend the field.
1644 TK/01 Bugzilla #401. Fix DK spooling code so that it can overwrite a
1645 leftover -K file (the existence of which was triggered by #402).
1646 While we were at it, introduced process PID as part of the -K
1647 filename. This should rule out race conditions when creating
1650 TK/02 Bugzilla #402. Apply patch from Simon Arlott, speeding up DK signing
1651 processing considerably. Previous code took too long for large mails,
1652 triggering a timeout which in turn triggers #401.
1654 TK/03 Introduced HAVE_LINUX_SENDFILE to os.h-Linux. Currently only used
1655 in the DK code in transports.c. sendfile() is not really portable,
1656 hence the _LINUX specificness.
1658 TF/01 In the add_headers option to the mail command in an Exim filter,
1659 there was a bug that Exim would claim a syntax error in any
1660 header after the first one which had an odd number of characters
1663 PH/01 If a server that rejects MAIL FROM:<> was the target of a sender
1664 callout verification, Exim cached a "reject" for the entire domain. This
1665 is correct for most verifications, but it is not correct for a recipient
1666 verification with use_sender or use_postmaster set, because in that case
1667 the callout does not use MAIL FROM:<>. Exim now distinguishes the special
1668 case of MAIL FROM:<> rejection from other early rejections (e.g.
1669 rejection of HELO). When verifying a recipient using a non-null MAIL
1670 address, the cache is ignored if it shows MAIL FROM:<> rejection.
1671 Whatever the result of the callout, the value of the domain cache is
1672 left unchanged (for any other kind of callout, getting as far as trying
1673 RCPT means that the domain itself is ok).
1675 PH/02 Tidied a number of unused variable and signed/unsigned warnings that
1678 PH/03 On Solaris, an unexpectedly close socket (dropped connection) can
1679 manifest itself as EPIPE rather than ECONNECT. When tidying away a
1680 session, the daemon ignores ECONNECT errors and logs others; it now
1681 ignores EPIPE as well.
1683 PH/04 Applied Nico Erfurth's refactoring patch to tidy up mime.c
1684 (quoted-printable decoding).
1686 PH/05 Applied Nico Erfurth's refactoring patch to tidy up spool_mbox.c, and
1687 later the small subsequent patch to fix an introduced bug.
1689 PH/06 Installed the latest Cygwin Makefile from the Cygwin maintainer.
1691 PH/07 There was no check for overflow in expansions such as ${if >{1}{4096M}}.
1693 PH/08 An error is now given if message_size_limit is specified negative.
1695 PH/09 Applied and tidied up Jakob Hirsch's patch for allowing ACL variables
1696 to be given (somewhat) arbitrary names.
1698 JJ/01 exipick 20060919.0, allow for arbitrary acl_ variables introduced
1701 JJ/02 exipick 20060919.0, --show-vars args can now be regular expressions,
1702 miscellaneous code fixes
1704 PH/10 Added the log_reject_target ACL modifier to specify where to log
1707 PH/11 Callouts were setting the name used for EHLO/HELO from $smtp_active_
1708 hostname. This is wrong, because it relates to the incoming message (and
1709 probably the interface on which it is arriving) and not to the outgoing
1710 callout (which could be using a different interface). This has been
1711 changed to use the value of the helo_data option from the smtp transport
1712 instead - this is what is used when a message is actually being sent. If
1713 there is no remote transport (possible with a router that sets up host
1714 addresses), $smtp_active_hostname is used.
1716 PH/12 Installed Andrey Panin's patch to add a dovecot authenticator. Various
1717 tweaks were necessary in order to get it to work (see also 21 below):
1718 (a) The code assumed that strncpy() returns a negative number on buffer
1719 overflow, which isn't the case. Replaced with Exim's string_format()
1721 (b) There were several signed/unsigned issues. I just did the minimum
1722 hacking in of casts. There is scope for a larger refactoring.
1723 (c) The code used strcasecmp() which is not a standard C function.
1724 Replaced with Exim's strcmpic() function.
1725 (d) The code set only $1; it now sets $auth1 as well.
1726 (e) A simple test gave the error "authentication client didn't specify
1727 service in request". It would seem that Dovecot has changed its
1728 interface. Fortunately there's a specification; I followed it and
1729 changed what the client sends and it appears to be working now.
1731 PH/13 Added $message_headers_raw to provide the headers without RFC 2047
1734 PH/14 Corrected misleading output from -bv when -v was also used. Suppose the
1735 address A is aliased to B and C, where B exists and C does not. Without
1736 -v the output is "A verified" because verification stops after a
1737 successful redirection if more than one address is generated. However,
1738 with -v the child addresses are also verified. Exim was outputting "A
1739 failed to verify" and then showing the successful verification for C,
1740 with its parentage. It now outputs "B failed to verify", showing B's
1741 parentage before showing the successful verification of C.
1743 PH/15 Applied Michael Deutschmann's patch to allow DNS black list processing to
1744 look up a TXT record in a specific list after matching in a combined
1747 PH/16 It seems that the options setting for the resolver (RES_DEFNAMES and
1748 RES_DNSRCH) can affect the behaviour of gethostbyname() and friends when
1749 they consult the DNS. I had assumed they would set it the way they
1750 wanted; and indeed my experiments on Linux seem to show that in some
1751 cases they do (I could influence IPv6 lookups but not IPv4 lookups).
1752 To be on the safe side, however, I have now made the interface to
1753 host_find_byname() similar to host_find_bydns(), with an argument
1754 containing the DNS resolver options. The host_find_byname() function now
1755 sets these options at its start, just as host_find_bydns() does. The smtp
1756 transport options dns_qualify_single and dns_search_parents are passed to
1757 host_find_byname() when gethostbyname=TRUE in this transport. Other uses
1758 of host_find_byname() use the default settings of RES_DEFNAMES
1759 (qualify_single) but not RES_DNSRCH (search_parents).
1761 PH/17 Applied (a modified version of) Nico Erfurth's patch to make
1762 spool_read_header() do less string testing, by means of a preliminary
1763 switch on the second character of optional "-foo" lines. (This is
1764 overdue, caused by the large number of possibilities that now exist.
1765 Originally there were few.) While I was there, I also converted the
1766 str(n)cmp tests so they don't re-test the leading "-" and the first
1767 character, in the hope this might squeeze out yet more improvement.
1769 PH/18 Two problems with "group" syntax in header lines when verifying: (1) The
1770 flag allowing group syntax was set by the header_syntax check but not
1771 turned off, possible causing trouble later; (2) The flag was not being
1772 set at all for the header_verify test, causing "group"-style headers to
1773 be rejected. I have now set it in this case, and also caused header_
1774 verify to ignore an empty address taken from a group. While doing this, I
1775 came across some other cases where the code for allowing group syntax
1776 while scanning a header line wasn't quite right (mostly, not resetting
1777 the flag correctly in the right place). These bugs could have caused
1778 trouble for malformed header lines. I hope it is now all correct.
1780 PH/19 The functions {pwcheck,saslauthd}_verify_password() are always called
1781 with the "reply" argument non-NULL. The code, however (which originally
1782 came from elsewhere) had *some* tests for NULL when it wrote to *reply,
1783 but it didn't always do it. This confused somebody who was copying the
1784 code for some other use. I have removed all the tests.
1786 PH/20 It was discovered that the GnuTLS code had support for RSA_EXPORT, a
1787 feature that was used to support insecure browsers during the U.S. crypto
1788 embargo. It requires special client support, and Exim is probably the
1789 only MTA that supported it -- and would never use it because real RSA is
1790 always available. This code has been removed, because it had the bad
1791 effect of slowing Exim down by computing (never used) parameters for the
1792 RSA_EXPORT functionality.
1794 PH/21 On the advice of Timo Sirainen, added a check to the dovecot
1795 authenticator to fail if there's a tab character in the incoming data
1796 (there should never be unless someone is messing about, as it's supposed
1797 to be base64-encoded). Also added, on Timo's advice, the "secured" option
1798 if the connection is using TLS or if the remote IP is the same as the
1799 local IP, and the "valid-client-cert option" if a client certificate has
1802 PH/22 As suggested by Dennis Davis, added a server_condition option to *all*
1803 authenticators. This can be used for authorization after authentication
1804 succeeds. (In the case of plaintext, it servers for both authentication
1807 PH/23 Testing for tls_required and lost_connection in a retry rule didn't work
1808 if any retry times were supplied.
1810 PH/24 Exim crashed if verify=helo was activated during an incoming -bs
1811 connection, where there is no client IP address to check. In this
1812 situation, the verify now always succeeds.
1814 PH/25 Applied John Jetmore's -Mset patch.
1816 PH/26 Added -bem to be like -Mset, but loading a message from a file.
1818 PH/27 In a string expansion for a processed (not raw) header when multiple
1819 headers of the same name were present, leading whitespace was being
1820 removed from all of them, but trailing whitespace was being removed only
1821 from the last one. Now trailing whitespace is removed from each header
1822 before concatenation. Completely empty headers in a concatenation (as
1823 before) are ignored.
1825 PH/28 Fixed bug in backwards-compatibility feature of PH/09 (thanks to John
1826 Jetmore). It would have mis-read ACL variables from pre-4.61 spool files.
1828 PH/29 [Removed. This was a change that I later backed out, and forgot to
1829 correct the ChangeLog entry (that I had efficiently created) before
1830 committing the later change.]
1832 PH/30 Exim was sometimes attempting to deliver messages that had suffered
1833 address errors (4xx response to RCPT) over the same connection as other
1834 messages routed to the same hosts. Such deliveries are always "forced",
1835 so retry times are not inspected. This resulted in far too many retries
1836 for the affected addresses. The effect occurred only when there were more
1837 hosts than the hosts_max_try setting in the smtp transport when it had
1838 the 4xx errors. Those hosts that it had tried were not added to the list
1839 of hosts for which the message was waiting, so if all were tried, there
1840 was no problem. Two fixes have been applied:
1842 (i) If there are any address or message errors in an SMTP delivery, none
1843 of the hosts (tried or untried) are now added to the list of hosts
1844 for which the message is waiting, so the message should not be a
1845 candidate for sending over the same connection that was used for a
1846 successful delivery of some other message. This seems entirely
1847 reasonable: after all the message is NOT "waiting for some host".
1848 This is so "obvious" that I'm not sure why it wasn't done
1849 previously. Hope I haven't missed anything, but it can't do any
1850 harm, as the worst effect is to miss an optimization.
1852 (ii) If, despite (i), such a delivery is accidentally attempted, the
1853 routing retry time is respected, so at least it doesn't keep
1854 hammering the server.
1856 PH/31 Installed Andrew Findlay's patch to close the writing end of the socket
1857 in ${readsocket because some servers need this prod.
1859 PH/32 Added some extra debug output when updating a wait-xxx database.
1861 PH/33 The hint "could be header name not terminated by colon", which has been
1862 given for certain expansion errors for a long time, was not being given
1863 for the ${if def:h_colon_omitted{... case.
1865 PH/34 The spec says: "With one important exception, whenever a domain list is
1866 being scanned, $domain contains the subject domain." There was at least
1867 one case where this was not true.
1869 PH/35 The error "getsockname() failed: connection reset by peer" was being
1870 written to the panic log as well as the main log, but it isn't really
1871 panic-worthy as it just means the connection died rather early on. I have
1872 removed the panic log writing for the ECONNRESET error when getsockname()
1875 PH/36 After a 4xx response to a RCPT error, that address was delayed (in queue
1876 runs only) independently of the message's sender address. This meant
1877 that, if the 4xx error was in fact related to the sender, a different
1878 message to the same recipient with a different sender could confuse
1879 things. In particualar, this can happen when sending to a greylisting
1880 server, but other circumstances could also provoke similar problems.
1881 I have changed the default so that the retry time for these errors is now
1882 based a combination of the sender and recipient addresses. This change
1883 can be overridden by setting address_retry_include_sender=false in the
1886 PH/37 For LMTP over TCP/IP (the smtp transport), error responses from the
1887 remote server are returned as part of bounce messages. This was not
1888 happening for LMTP over a pipe (the lmtp transport), but now it is the
1889 same for both kinds of LMTP.
1891 PH/38 Despite being documented as not happening, Exim was rewriting addresses
1892 in header lines that were in fact CNAMEs. This is no longer the case.
1894 PH/39 If -R or -S was given with -q<time>, the effect of -R or -S was ignored,
1895 and queue runs started by the daemon processed all messages. This has
1896 been fixed so that -R and -S can now usefully be given with -q<time>.
1898 PH/40 Import PCRE release 6.7 (fixes some bugs).
1900 PH/41 Add bitwise logical operations to eval (courtesy Brad Jorsch).
1902 PH/42 Give an error if -q is specified more than once.
1904 PH/43 Renamed the variables $interface_address and $interface_port as
1905 $received_ip_address and $received_port, to make it clear that these
1906 values apply to message reception, and not to the outgoing interface when
1907 a message is delivered. (The old names remain recognized, of course.)
1909 PH/44 There was no timeout on the connect() call when using a Unix domain
1910 socket in the ${readsocket expansion. There now is.
1912 PH/45 Applied a modified version of Brad Jorsch's patch to allow "message" to
1913 be meaningful with "accept".
1915 SC/01 Eximstats V1.43
1916 Bug fix for V1.42 with -h0 specified. Spotted by Chris Lear.
1918 SC/02 Eximstats V1.44
1919 Use a glob alias rather than an array ref in the generated
1920 parser. This improves both readability and performance.
1922 SC/03 Eximstats V1.45 (Marco Gaiarin / Steve Campbell)
1923 Collect SpamAssassin and rejection statistics.
1924 Don't display local sender or destination tables unless
1925 there is data to show.
1926 Added average volumes into the top table text output.
1928 SC/04 Eximstats V1.46
1929 Collect data on the number of addresses (recipients)
1930 as well as the number of messages.
1932 SC/05 Eximstats V1.47
1933 Added 'Message too big' to the list of mail rejection
1934 reasons (thanks to Marco Gaiarin).
1936 SC/06 Eximstats V1.48
1937 Mainlog lines which have GMT offsets and are too short to
1938 have a flag are now skipped.
1940 SC/07 Eximstats V1.49 (Alain Williams)
1941 Added the -emptyok flag.
1943 SC/08 Eximstats V1.50
1944 Fixes for obtaining the IP address from reject messages.
1946 JJ/03 exipick.20061117.2, made header handling as similar to exim as possible
1947 (added [br]h_ prefixes, implemented RFC2047 decoding. Fixed
1948 whitesspace changes from 4.64-PH/27
1950 JJ/04 exipick.20061117.2, fixed format and added $message_headers_raw to
1953 JJ/05 exipick.20061117.2, bug fixes (error out sooner when invalid criteria
1954 are found, allow negative numbers in numeric criteria)
1956 JJ/06 exipick.20061117.2, added new $message_body_missing variable
1958 JJ/07 exipick.20061117.2, added $received_ip_address and $received_port
1959 to match changes made in 4.64-PH/43
1961 PH/46 Applied Jori Hamalainen's patch to add features to exiqsumm.
1963 PH/47 Put in an explicit test for a DNS lookup of an address record where the
1964 "domain" is actually an IP address, and force a failure. This locks out
1965 those revolvers/nameservers that support "A-for-A" lookups, in
1966 contravention of the specifications.
1968 PH/48 When a host name was looked up from an IP address, and the subsequent
1969 forward lookup of the name timed out, the host name was left in
1970 $sender_host_name, contrary to the specification.
1972 PH/49 Although default lookup types such as lsearch* or cdb*@ have always been
1973 restricted to single-key lookups, Exim was not diagnosing an error if
1974 * or *@ was used with a query-style lookup.
1976 PH/50 Increased the value of DH_BITS in tls-gnu.c from 768 to 1024.
1978 MH/01 local_scan ABI version incremented to 1.1. It should have been updated
1979 long ago, but noone interested enough thought of it. Let's just say that
1980 the "1.1" means that there are some new functions that weren't there at
1981 some point in the past.
1983 PH/51 Error processing for expansion failure of helo_data from an smtp
1984 transport during callout processing was broken.
1986 PH/52 Applied John Jetmore's patch to allow tls-on-connect and STARTTLS to be
1987 tested/used via the -bh/-bhc/-bs options.
1989 PH/53 Added missing "#include <time.h>" to pcre/pcretest.c (this was a PCRE
1990 bug, fixed in subsequent PCRE releases).
1992 PH/54 Applied Robert Bannocks' patch to avoid a problem with references that
1993 arises when using the Solaris LDAP libraries (but not with OpenLDAP).
1995 PH/55 Check for a ridiculously long file name in exim_dbmbuild.
2001 SC/01 Use a glob alias rather than an array ref in eximstats generated
2002 parser. This improves both readability and performance.
2004 SC/02 Collect SpamAssassin and rejection statistics in eximstats.
2005 Don't display local sender or destination tables in eximstats unless
2006 there is data to show.
2007 Added average volumes into the eximstats top table text output.
2009 SC/03 Collect data on the number of addresses (recipients) as well
2010 as the number of messages in eximstats.
2012 TF/01 Correct an error in the documentation for the redirect router. Exim
2013 does (usually) call initgroups() when daemonizing.
2015 TF/02 Call initgroups() when dropping privilege in exim.c, so that Exim runs
2016 with consistent privilege compared to when running as a daemon.
2018 TF/03 Note in the spec that $authenticated_id is not set for local
2019 submissions from trusted users.
2021 TF/04 The ratelimit per_rcpt option now works correctly in acl_not_smtp.
2022 Thanks to Dean Brooks <dean@iglou.com> for the patch.
2024 TF/05 Make it easier to get SMTP authentication and TLS/SSL support working
2025 by adding some example configuration directives to the default
2026 configuration file. A little bit of work is required to uncomment the
2027 directives and define how usernames and passwords are checked, but
2028 there is now a framework to start from.
2030 PH/01 Added #define LDAP_DEPRECATED 1 to ldap.c because some of the "old"
2031 functions that Exim currently uses aren't defined in ldap.h for OpenLDAP
2032 without this. I don't know how relevant this is to other LDAP libraries.
2034 PH/02 Add the verb name to the "unknown ACL verb" error.
2036 PH/03 Magnus Holmgren's patch for filter_prepend_home.
2038 PH/03 Fixed Bugzilla #101: macro definition between ACLs doesn't work.
2040 PH/04 Applied Magnus Holmgren's patch to fix Bugzilla #98: transport's home
2041 directory not expanded when it should be if an expanded home directory
2042 was set for the address (which is overridden by the transport).
2044 PH/05 Applied Alex Kiernan's patch to fix Bugzilla #99: a problem with
2047 PH/06 Added acl_not_smtp_start, based on Johannes Berg's patch, and set the
2048 bit to forbid control=suppress_local_fixups in the acl_not_smtp ACL,
2049 because it is too late at that time, and has no effect.
2051 PH/07 Changed ${quote_pgsql to quote ' as '' instead of \' because of a
2052 security issue with \' (bugzilla #107). I could not use the
2053 PQescapeStringConn() function, because it needs a PGconn value as one of
2056 PH/08 When testing addresses using -bt, indicate those final addresses that
2057 are duplicates that would not cause an additional delivery. At least one
2058 person was confused, thinking that -bt output corresponded to deliveries.
2059 (Suppressing duplicates isn't a good idea as you lose the information
2060 about possibly different redirections that led to the duplicates.)
2062 PH/09 Applied patch from Erik to use select() instead of poll() in spam.c on
2063 systems where poll() doesn't work, in particular OS X.
2065 PH/10 Added more information to debugging output for retry time not reached.
2067 PH/11 Applied patch from Arkadiusz Miskiewicz to apply a timeout to read
2068 operations in malware.c.
2070 PH/12 Applied patch from Magnus Holmgren to include the "h" tag in Domain Keys
2073 PH/13 If write_rejectlog was set false when logging was sent to syslog with
2074 syslog_duplication set false, log lines that would normally be written
2075 both the the main log and to the reject log were not written to syslog at
2078 PH/14 In the default configuration, change the use of "message" in ACL warn
2079 statements to "add_header".
2081 PH/15 Diagnose a filter syntax error for "seen", "unseen", or "noerror" if not
2082 not followed by a command (e.g. "seen endif").
2084 PH/16 Recognize SMTP codes at the start of "message" in ACLs and after :fail:
2085 and :defer: in a redirect router. Add forbid_smtp_code to suppress the
2088 PH/17 Added extra conditions to the default value of delay_warning_condition
2092 { !eq{$h_list-id:$h_list-post:$h_list-subscribe:}{} } \
2093 { match{$h_precedence:}{(?i)bulk|list|junk} } \
2094 { match{$h_auto-submitted:}{(?i)auto-generated|auto-replied} } \
2097 The Auto-Submitted: and various List- headers are standardised, whereas I
2098 don't think Precedence: ever was.
2100 PH/18 Refactored debugging code in route_finduser() to show more information,
2101 in particular, the error code if getpwnam() issues one.
2103 PH/19 Added PQsetClientEncoding(conn, "SQL_ASCII") to the pgsql code module.
2104 This is apparently needed in addition to the PH/07 change above to avoid
2105 any possible encoding problems.
2107 PH/20 Perl can change the locale. Exim was resetting it after a ${perl call,
2108 but not after initializing Perl.
2110 PH/21 Added a call to PQsetNoticeProcessor() to catch pgsql "notices" and
2111 output them only if debugging. By default they are written stderr,
2112 apparently, which is not desirable.
2114 PH/22 Added Alain Williams' LDAP patch to support setting REFERRALS=off on
2117 JJ/01 exipick: added --reverse (and -R synonym), --random, --size, --sort and
2120 JJ/02 exipick: rewrote --help documentation to hopefully make more clear.
2122 PH/23 Made -oMaa and -oMt work with -bh and -bs to pretend the connection is
2123 authenticated or an ident call has been made. Suppress the default
2124 values for $authenticated_id and $authenticated_sender (but permit -oMai
2125 and -oMas) when testing with -bh.
2127 PH/24 Re-jigged the order of the tests in the default configuration so that the
2128 tests for valid domains and recipients precede the DNS black list and CSA
2129 tests, on the grounds that those ones are more expensive.
2131 PH/25 Exim was not testing for a space following SMTP commands such as EHLO
2132 that require one. Thus, EHLORHUBARB was interpreted as a valid command.
2133 This bug exists in every version of Exim that I still have, right back to
2136 PH/26 (n)wildlsearch lookups are documented as being done case-insensitively.
2137 However, an attempt to turn on case-sensitivity in a regex key by
2138 including (?-i) didn't work because the subject string was already
2139 lowercased, and the effects were non-intuitive. It turns out that a
2140 one-line patch can be used to allow (?-i) to work as expected.
2146 TF/01 Fix the add_header change below (4.61 PH/55) which had a bug that (amongst
2147 other effects) broke the use of negated acl sub-conditions.
2149 PH/01 ${readsocket now supports Internet domain sockets (modified John Jetmore
2152 PH/02 When tcp-wrappers is called from Exim, it returns only "deny" or "allow".
2153 "Deny" causes Exim to reject the incoming connection with a 554 error.
2154 Unfortunately, if there is a major crisis, such as a disk failure,
2155 tcp-wrappers gives "deny", whereas what one would like would be some
2156 kind of temporary error. A kludge has been added to help with this.
2157 Before calling hosts_ctl(), errno is set zero. If the result is "deny", a
2158 554 error is used if errno is still zero or contains ENOENT (which occurs
2159 if either of the /etc/hosts.{allow,deny} files is missing). Otherwise, a
2162 PH/03 Add -lutil to the default FreeBSD LIBS setting.
2164 PH/04 Change PH/19 for 4.61 was too wide. It should not be applied to host
2165 errors. Otherwise a message that provokes a temporary error (when other
2166 messages do not) can cause a whole host to time out.
2168 PH/05 Batch deliveries by appendfile and pipe transports did not work when the
2169 addresses were routed directly to files or pipes from a redirect router.
2170 File deliveries just didn't batch; pipe deliveries might have suffered
2173 PH/06 A failure to get a lock for a hints database would erroneously always say
2174 "Failed to get write lock", even when it was really a read lock.
2176 PH/07 The appendfile transport was creating MBX lock files with a fixed mode
2177 of 0600. This has been changed to use the value of the lockfile_mode
2178 option (which defaults to 0600).
2180 PH/08 Applied small patch from the Sieve maintainer.
2182 PH/09 If maildir_quota_directory_regex was set to exclude (say) the .Trash
2183 folder from quota calculations, a direct delivery into this folder messed
2184 up the contents of the maildirsize file. This was because the regex was
2185 used only to exclude .Trash (or whatever) when the size of the mailbox
2186 was calculated. There was no check that a delivery was happening into an
2187 excluded directory. This bug has been fixed by ignoring all quota
2188 processing for deliveries into excluded directories.
2190 PH/10 Added the maildirfolder_create_regex option to appendfile.
2196 PH/01 The code for finding all the local interface addresses on a FreeBSD
2197 system running IPv6 was broken. This may well have applied to all BSD
2198 systems, as well as to others that have similar system calls. The broken
2199 code found IPv4 interfaces correctly, but gave incorrect values for the
2200 IPv6 interfaces. In particular, ::1 was not found. The effect in Exim was
2201 that it would not match correctly against @[] and not recognize the IPv6
2204 PH/02 The ipliteral router was not recognizing addresses of the form user@
2205 [ipv6:....] because it didn't know about the "ipv6:" prefix.
2207 PH/03 Added disable_ipv6.
2209 PH/04 Changed $reply_address to use the raw form of the headers instead of the
2210 decoded form, because it is most often used to construct To: headers
2211 lines in autoreplies, and the decoded form may well be syntactically
2212 invalid. However, $reply_address has leading white space removed, and all
2213 newlines turned into spaces so that the autoreply transport does not
2216 PH/05 If group was specified without a user on a router, and no group or user
2217 was specified on a transport, the group from the router was ignored.
2219 PH/06 Increased the number of ACL variables to 20 of each type, and arranged
2220 for visible compile-time settings that can be used to change these
2221 numbers, for those that want even more. Backwards compatibility with old
2222 spool files has been maintained. However, going back to a previous Exim
2223 release will lost any variables that are in spool files.
2225 PH/07 Two small changes when running in the test harness: increase delay when
2226 passing a TCP/IP connection to a new process, in case the original
2227 process has to generate a bounce, and remove special handling of
2228 127.0.0.2 (sic), which is no longer necessary.
2230 PH/08 Changed debug output of dbfn_open() flags from numbers to names, so as to
2231 be the same on different OS.
2233 PH/09 Moved a debug statement in filter processing to avoid a race problem when
2236 JJ/01 exipick: fixed bug where -b (brief) output option showed "Vars:"
2237 whether --show-vars was specified or not
2239 JJ/02 exipick: Added support for new ACL variable spool format introduced
2242 PH/10 Fixed another bug related to PH/04 above: if an incoming message had a
2243 syntactically invalid From: or Reply-to: line, and a filter used this to
2244 generate an autoreply, and therefore failed to obtain an address for the
2245 autoreply, Exim could try to deliver to a non-existent relative file
2246 name, causing unrelated and misleading errors. What now happens is that
2247 it logs this as a hard delivery error, but does not attempt to create a
2250 PH/11 The exinext utility has a -C option for testing purposes, but although
2251 the given file was scanned by exinext itself; it wasn't being passed on
2252 when Exim was called.
2254 PH/12 In the smtp transport, treat an explicit ECONNRESET error the same as
2255 an end-of-file indication when reading a command response.
2257 PH/13 Domain literals for IPv6 were not recognized unless IPv6 support was
2258 compiled. In many other places in Exim, IPv6 addresses are always
2259 recognized, so I have changed this. It also means that IPv4 domain
2260 literals of the form [IPV4:n.n.n.n] are now always recognized.
2262 PH/14 When a uid/gid is specified for the queryprogram router, it cannot be
2263 used if the router is not running as root, for example, when verifying at
2264 ACL time, or when using -bh. The debugging output from this situation was
2265 non-existent - all you got was a failure to exec. I have made two
2268 (a) Failures to set uid/gid, the current directory, or a process leader
2269 in a subprocess such as that created by queryprogram now generate
2270 suitable debugging ouput when -d is set.
2272 (b) The queryprogram router detects when it is not running as root,
2273 outputs suitable debugging information if -d is set, and then runs
2274 the subprocess without attempting to change uid/gid.
2276 PH/15 Minor change to Makefile for building test_host (undocumented testing
2279 PH/16 As discussed on the list in Nov/Dec: Exim no longer looks at the
2280 additional section of a DNS packet that returns MX or SRV records.
2281 Instead, it always explicitly searches for A/AAAA records. This avoids
2282 major problems that occur when a DNS server includes only records of one
2283 type (A or AAAA) in an MX/SRV packet. A byproduct of this change has
2284 fixed another bug: if SRV records were looked up and the corresponding
2285 address records were *not* found in the additional section, the port
2286 values from the SRV records were lost.
2288 PH/17 If a delivery to a pipe, file, or autoreply was deferred, Exim was not
2289 using the correct key (the original address) when searching the retry
2290 rules in order to find which one to use for generating the retry hint.
2292 PH/18 If quota_warn_message contains a From: header, Exim now refrains from
2293 adding the default one. Similarly, if it contains a Reply-To: header, the
2294 errors_reply_to option, if set, is not used.
2296 PH/19 When calculating a retry time, Exim used to measure the "time since
2297 failure" by looking at the "first failed" field in the retry record. Now
2298 it does not use this if it is later than than the arrival time of the
2299 message. Instead it uses the arrival time. This makes for better
2300 behaviour in cases where some deliveries succeed, thus re-setting the
2301 "first failed" field. An example is a quota failure for a huge message
2302 when small messages continue to be delivered. Without this change, the
2303 "time since failure" will always be short, possible causing more frequent
2304 delivery attempts for the huge message than are intended.
2305 [Note: This change was subsequently modified - see PH/04 for 4.62.]
2307 PH/20 Added $auth1, $auth2, $auth3 to contain authentication data (as well as
2308 $1, $2, $3) because the numerical variables can be reset during some
2309 expansion items (e.g. "match"), thereby losing the authentication data.
2311 PH/21 Make -bV show the size of off_t variables so that the test suite can
2312 decide whether to run tests for quotas > 2G.
2314 PH/22 Test the values given for quota, quota_filecount, quota_warn_threshold,
2315 mailbox_size, and mailbox_filecount in the appendfile transport. If a
2316 filecount value is greater than 2G or if a quota value is greater than 2G
2317 on a system where the size of off_t is not greater than 4, a panic error
2320 PH/23 When a malformed item such as 1.2.3/24 appears in a host list, it can
2321 never match. The debug and -bh output now contains an explicit error
2322 message indicating a malformed IPv4 address or mask.
2324 PH/24 An host item such as 1.2.3.4/abc was being treated as the IP address
2325 1.2.3.4 without a mask. Now it is not recognized as an IP address, and
2326 PH/23 above applies.
2328 PH/25 Do not write to syslog when running in the test harness. The only
2329 occasion when this arises is a failure to open the main or panic logs
2330 (for which there is an explicit test).
2332 PH/26 Added the /no_tell option to "control=freeze".
2334 PH/27 If a host name lookup failed very early in a connection, for example, if
2335 the IP address matched host_lookup and the reverse lookup yielded a name
2336 that did not have a forward lookup, an error message of the form "no IP
2337 address found for host xxx.xxx.xxx (during SMTP connection from NULL)"
2338 could be logged. Now it outputs the IP address instead of "NULL".
2340 PH/28 An enabling patch from MH: add new function child_open_exim2() which
2341 allows the sender and the authenticated sender to be set when
2342 submitting a message from within Exim. Since child_open_exim() is
2343 documented for local_scan(), the new function should be too.
2345 PH/29 In GnuTLS, a forced expansion failure for tls_privatekey was not being
2346 ignored. In both GnuTLS and OpenSSL, an expansion of tls_privatekey that
2347 results in an empty string is now treated as unset.
2349 PH/30 Fix eximon buffer overflow bug (Bugzilla #73).
2351 PH/31 Added sender_verify_fail logging option.
2353 PH/32 In November 2003, the code in Exim that added an empty Bcc: header when
2354 needed by RFC 822 but not by RFC 2822 was commented out. I have now
2355 tidied the source and removed it altogether.
2357 PH/33 When a queue run was abandoned because the load average was too high, a
2358 log line was always written; now it is written only if the queue_run log
2359 selector is set. In addition, the log line for abandonment now contains
2360 information about the queue run such as the pid. This is always present
2361 in "start" and "stop" lines but was omitted from the "abandon" line.
2363 PH/34 Omit spaces between a header name and the colon in the error message that
2364 is given when verify = headers_syntax fails (if there are lots of them,
2365 the message gets confusing).
2367 PH/35 Change the default for dns_check_names_pattern to allow slashes within
2368 names, as there are now some PTR records that contain slashes. This check
2369 is only to protect against broken name servers that fall over on strange
2370 characters, so the fact that it applies to all lookups doesn't matter.
2372 PH/36 Now that the new test suite is complete, we can remove some of the
2373 special code in Exim that was needed for the old test suite. For example,
2374 sorting DNS records because real resolvers return them in an arbitrary
2375 order. The new test suite's fake resolver always returns records in the
2378 PH/37 When running in the test harness, use -odi for submitted messages (e.g.
2379 bounces) except when queue_only is set, to avoid logging races between
2380 the different processes.
2382 PH/38 Panic-die if .include specifies a non-absolute path.
2384 PH/39 A tweak to the "H" retry rule from its user.
2386 JJ/03 exipick: Removed parentheses from 'next' and 'last' calls that specified
2387 a label. They prevented compilation on older perls.
2389 JJ/04 exipick: Refactored code to prevent implicit split to @_ which caused
2390 a warning to be raised on newish perls.
2392 JJ/05 exipick: Fixed bug where -bpc always showed a count of all messages
2393 on queue. Changes to match documented behaviour of showing count of
2394 messages matching specified criteria.
2396 PH/40 Changed the default ident timeout from 30s to 5s.
2398 PH/41 Added support for the use of login_cap features, on those BSD systems
2399 that have them, for controlling the resources used by pipe deliveries.
2401 PH/42 The content-scanning code uses fopen() to create files in which to put
2402 message data. Previously it was not paying any attention to the mode of
2403 the files. Exim runs with umask(0) because the rest of the code creates
2404 files with open(), and sets the required mode explicitly. Thus, these
2405 files were ending up world-writeable. This was not a big issue, because,
2406 being within the spool directory, they were not world-accessible. I have
2407 created a function called modefopen, which takes an additional mode
2408 argument. It sets umask(777), creates the file, chmods it to the required
2409 mode, then resets the umask. All the relevant calls to fopen() in the
2410 content scanning code have been changed to use this function.
2412 PH/43 If retry_interval_max is set greater than 24 hours, it is quietly reset
2413 to 24 hours. This avoids potential overflow problems when processing G
2414 and H retry rules. I suspect nobody ever tinkers with this value.
2416 PH/44 Added STRIP_COMMAND=/usr/bin/strip to the FreeBSD Makefile.
2418 PH/45 When the plaintext authenticator is running as a client, the server's
2419 challenges are checked to ensure they are valid base64 strings. By
2420 default, the authentication attempt is cancelled if an invalid string is
2421 received. Setting client_ignore_invalid_base64 true ignores these errors.
2422 The decoded challenge strings are now placed in $auth1, $auth2, etc. as
2423 they are received. Thus, the responses can be made to depend on the
2424 challenges. If an invalid string is ignored, an empty string is placed in
2427 PH/46 Messages that are created by the autoreply transport now contains a
2428 References: header, in accordance with RFCs 2822 and 3834.
2430 PH/47 Added authenticated_sender_force to the smtp transport.
2432 PH/48 The ${prvs expansion was broken on systems where time_t was long long.
2434 PH/49 Installed latest patch from the Sieve maintainer.
2436 PH/50 When an Exim quota was set without a file count quota, and mailbox_size
2437 was also set, the appendfile transport was unnecessarily scanning a
2438 directory of message files (e.g. for maildir delivery) to find the count
2439 of files (along with the size), even though it did not need this
2440 information. It now does the scan only if it needs to find either the
2441 size of the count of files.
2443 PH/51 Added ${time_eval: to convert Exim time strings into seconds.
2445 PH/52 Two bugs concerned with error handling when the smtp transport is
2448 (i) Exim was not creating retry information for temporary errors given
2449 for individual recipients after the DATA command when the smtp transport
2450 was used in LMTP mode. This meant that they could be retried too
2451 frequently, and not timed out correctly.
2453 (ii) Exim was setting the flag that allows error details to be returned
2454 for LMTP errors on RCPT commands, but not for LMTP errors for individual
2455 recipients that were returned after the DATA command.
2457 PH/53 This is related to PH/52, but is more general: for any failing address,
2458 when detailed error information was permitted to be returned to the
2459 sender, but the error was temporary, then after the final timeout, only
2460 "retry timeout exceeded" was returned. Now it returns the full error as
2461 well as "retry timeout exceeded".
2463 PH/54 Added control=allow_auth_unadvertised, as it seems there are clients that
2464 do this, and (what is worse) MTAs that accept it.
2466 PH/55 Added the add_header modified to ACLs. The use of "message" with "warn"
2467 will now be deprecated.
2469 PH/56 New os.c-cygwin from the Cygwin maintainer.
2471 JJ/06 exipick: added --unsorted option to allow unsorted output in all output
2472 formats (previously only available in exim formats via -bpr, -bpru,
2473 and -bpra. Now also available in native and exiqgrep formats)
2475 JJ/07 exipick: added --freeze and --thaw options to allow faster interaction
2476 with very large, slow to parse queues
2478 JJ/08 exipick: added ! as generic prefix to negate any criteria format
2480 JJ/09 exipick: miscellaneous performance enhancements (~24% improvements)
2482 PH/57 Tidies in SMTP dialogue display in debug output: (i) It was not showing
2483 responses to authentication challenges, though it was showing the
2484 challenges; (ii) I've removed the CR characters from the debug output for
2487 PH/58 Allow for the insertion of a newline as well as a space when a string
2488 is turned into more than one encoded-word during RFC 2047 encoding. The
2489 Sieve code now uses this.
2491 PH/59 Added the following errors that can be detected in retry rules: mail_4xx,
2492 data_4xx, lost_connection, tls_required.
2494 PH/60 When a VRFY deferred or FAILED, the log message rather than the user
2495 message was being sent as an SMTP response.
2497 PH/61 Add -l and -k options to exicyclog.
2499 PH/62 When verifying, if an address was redirected to one new address, so that
2500 verification continued, and the new address failed or deferred after
2501 having set something in $address_data, the value of $address_data was not
2502 passed back to the ACL. This was different to the case when no
2503 redirection occurred. The value is now passed back in both cases.
2505 PH/63 Changed the macro HAVE_LOGIN_CAP (see PH/41 for this release above) to
2506 HAVE_SETCLASSRESOURCES because there are different APIs in use that all
2507 use login_cap.h, so on its own it isn't the distinguishing feature. The
2508 new name refers directly to the setclassresources() function.
2510 PH/65 Added configuration files for NetBSD3.
2512 PH/66 Updated OS/Makefile-HP-UX for gcc 4.1.0 with HP-UX 11.
2514 PH/67 Fixed minor infelicity in the sorting of addresses to ensure that IPv6
2515 is preferred over IPv4.
2517 PH/68 The bounce_return_message and bounce_return_body options were not being
2518 honoured for bounces generated during the reception of non-SMTP messages.
2519 In particular, this applied to messages rejected by the ACL. This bug has
2520 been fixed. However, if bounce_return_message is true and bounce_return_
2521 body is false, the headers that are returned for a non-SMTP message
2522 include only those that have been read before the error was detected.
2523 (In the case of an ACL rejection, they have all been read.)
2525 PH/69 The HTML version of the specification is now built in a directory called
2526 spec_html instead of spec.html, because the latter looks like a path with
2527 a MIME-type, and this confuses some software.
2529 PH/70 Catch two compiler warnings in sieve.c.
2531 PH/71 Fixed an obscure and subtle bug (thanks Alexander & Matthias). The
2532 function verify_get_ident() calls ip_connect() to connect a socket, but
2533 if the "connect()" function timed out, ip_connect() used to close the
2534 socket. However, verify_get_ident() also closes the socket later, and in
2535 between Exim writes to the log, which may get opened at this point. When
2536 the socket was closed in ip_connect(), the log could get the same file
2537 descriptor number as the socket. This naturally causes chaos. The fix is
2538 not to close the socket in ip_connect(); the socket should be closed by
2539 the function that creates it. There was only one place in the code where
2540 this was missing, in the iplookup router, which I don't think anybody now
2541 uses, but I've fixed it anyway.
2543 PH/72 Make dns_again_means_nonexist apply to lookups using gethostbyname() as
2544 well as to direct DNS lookups. Otherwise the handling of names in host
2545 lists is inconsistent and therefore confusing.
2551 PH/01 Two changes to the default runtime configuration:
2553 (1) Move the checks for relay_from_hosts and authenticated clients from
2554 after to before the (commented out) DNS black list checks.
2556 (2) Add control=submission to the relay_from_hosts and authenticated
2557 clients checks, on the grounds that messages accepted by these
2558 statements are most likely to be submissions.
2560 PH/02 Several tidies to the handling of ${prvs and ${prvscheck:
2562 (1) Generate an error if the third argument for the ${prvs expansion is
2565 (2) Treat a missing third argument of ${prvscheck as if it were an empty
2568 (3) Reset the variables that are obtained from the first argument of
2569 ${prvscheck and used in the second argument before leaving the code,
2570 because their memory is reclaimed, so using them afterwards may do
2573 (4) Tidy up the code for expanding the arguments of ${prvscheck one by
2574 one (it's much easier than Tom thought :-).
2576 (5) Because of (4), we can now allow for the use of $prvscheck_result
2577 inside the third argument.
2579 PH/03 For some reason, the default setting of PATH when running a command from
2580 a pipe transport was just "/usr/bin". I have changed it to
2583 PH/04 SUPPORT_TRANSLATE_IP_ADDRESS and MOVE_FROZEN_MESSAGES did not cause
2584 anything to be listed in the output from -bV.
2586 PH/05 When a filter generated an autoreply, the entire To: header line was
2587 quoted in the delivery log line, like this:
2589 => >A.N.Other <ano@some.domain> <original@ddress> ...
2591 This has been changed so that it extracts the operative address. There
2592 may be more than one such address. If so, they are comma-separated, like
2595 => >ano@some.domain,ona@other.domain <original@ddress> ...
2597 PH/06 When a client host used a correct literal IP address in a HELO or EHLO
2598 command, (for example, EHLO [1.2.3.4]) and the client's IP address was
2599 not being looked up in the rDNS to get a host name, Exim was showing the
2600 IP address twice in Received: lines, even though the IP addresses were
2601 identical. For example:
2603 Received: from [1.2.3.4] (helo=[1.2.3.4])
2605 However, if the real host name was known, it was omitting the HELO data
2606 if it matched the actual IP address. This has been tidied up so that it
2607 doesn't show the same IP address twice.
2609 PH/07 When both +timestamp and +memory debugging was on, the value given by
2610 $tod_xxx expansions could be wrong, because the tod_stamp() function was
2611 called by the debug printing, thereby overwriting the timestamp buffer.
2612 Debugging no longer uses the tod_stamp() function when +timestamp is set.
2614 PH/08 When the original message was included in an autoreply transport, it
2615 always said "this is a copy of the message, including all the headers",
2616 even if body_only or headers_only was set. It now gives an appropriate
2619 PH/09 Applied a patch from the Sieve maintainer which:
2621 o fixes some comments
2622 o adds the (disabled) notify extension core
2623 o adds some debug output for the result of if/elsif tests
2624 o points to the current vacation draft in the documentation
2625 and documents the missing references header update
2629 o fixes a bug in processing the envelope test (when testing
2630 multiple envelope elements, the last element determinted the
2633 PH/10 Exim was violating RFC 3834 ("Recommendations for Automatic Responses to
2634 Electronic Mail") by including:
2636 Auto-submitted: auto-generated
2638 in the messages that it generates (bounce messages and others, such as
2639 warnings). In the case of bounce messages for non-SMTP mesages, there was
2640 also a typo: it was using "Auto_submitted" (underscore instead of
2641 hyphen). Since every message generated by Exim is necessarily in response
2642 to another message, thes have all been changed to:
2644 Auto-Submitted: auto-replied
2646 in accordance with these statements in the RFC:
2648 The auto-replied keyword:
2650 - SHOULD be used on messages sent in direct response to another
2651 message by an automatic process,
2653 - MUST NOT be used on manually-generated messages,
2655 - MAY be used on Delivery Status Notifications (DSNs) and Message
2656 Disposition Notifications (MDNs),
2658 - MUST NOT be used on messages generated by automatic or periodic
2659 processes, except for messages which are automatic responses to
2662 PH/11 Added "${if def:sender_address {(envelope-from <$sender_address>)\n\t}}"
2663 to the default Received: header definition.
2665 PH/12 Added log selector acl_warn_skipped (default on).
2667 PH/13 After a successful wildlsearch lookup, discard the values of numeric
2668 variables because (a) they are in the wrong storage pool and (b) even if
2669 they were copied, it wouldn't work properly because of the caching.
2671 PH/14 Add check_rfc2047_length to disable enforcement of RFC 2047 length
2672 checking when decoding. Apparently there are clients that generate
2673 overlong encoded strings. Why am I not surprised?
2675 PH/15 If the first argument of "${if match_address" was not empty, but did not
2676 contain an "@" character, Exim crashed. Now it writes a panic log message
2677 and treats the condition as false.
2679 PH/16 In autoreply, treat an empty string for "once" the same as unset.
2681 PH/17 A further patch from the Sieve maintainer: "Introduce the new Sieve
2682 extension "envelope-auth". The code is finished and in agreement with
2683 other implementations, but there is no documentation so far and in fact,
2684 nobody wrote the draft yet. This extension is currently #undef'ed, thus
2685 not changing the active code.
2687 Print executed "if" and "elsif" statements when debugging is used. This
2688 helps a great deal to understand what a filter does.
2690 Document more things not specified clearly in RFC3028. I had all this
2691 sorted out, when out of a sudden new issues came to my mind. Oops."
2693 PH/18 Exim was not recognizing the "net-" search type prefix in match_ip lists
2696 PH/19 Exim expands the IPv6 address given to -bh to its full non-abbreviated
2697 canonical form (as documented). However, after a host name lookup from
2698 the IP address, check_host() was doing a simple string comparison with
2699 addresses acquired from the DNS when checking that the found name did
2700 have the original IP as one of its addresses. Since any found IPv6
2701 addresses are likely to be in abbreviated form, the comparison could
2702 fail. Luckily, there already exists a function for doing the comparison
2703 by converting both addresses to binary, so now that is used instead of
2704 the text comparison.
2706 PH/20 There was another similar case to PH/19, when a complete host name was
2707 given in a host list; looking up its IP address could give an abbreviated
2708 form, whereas the current host's name might or might not be abbreviated.
2709 The same fix has been applied.
2715 PH/01 The ${base62: operator adjusted itself to base 36 when BASE_62 was
2716 set to 36 (for Darwin and Cygwin), but the ${base62d: operator did not.
2719 PH/02 Two minor problems detected in Cygwin: the os.{c,h} files had lost */ on
2720 the CVS lines, and there was a missing #if HAVE_IPV6 in host.c.
2722 PH/03 Typo: missing ".o" in src/pcre/Makefile.
2724 PH/04 Tighten up "personal" tests: Instead of testing for any "List-"
2725 header line, restrict the check to what is listed in RFCs 2369 and 2929.
2726 Also, for "Auto-Submitted", treat anything other than "no" as
2727 non-personal, in accordance with RFC 3834. (Previously it treated
2728 anything starting "auto-" as non-personal.)
2730 TF/01 The control=submission/name=... option had a problem with syntax
2731 errors if the name included a slash character. The /name= option
2732 now slurps the rest of the string, so it can include any characters
2733 but it must come last in the list of options (after /sender_retain
2736 PH/05 Some modifications to the interface to the fake nameserver for the new
2744 TK/01 Added the "success_on_redirect" address verification option. See
2745 NewStuff for rationale and an example.
2747 PH/01 Added support for SQLite, basic code supplied by David Woodhouse.
2749 PH/02 Patch to exigrep to allow it to work on syslog lines.
2751 PH/03 When creating an mbox file for a virus/spam scan, use fseek() instead of
2752 fread() to skip over the body file's header line, because in Cygwin the
2753 header line is locked and is inaccessible.
2755 PH/04 Added $message_exim_id, ultimately to replace $message_id (they will both
2756 co-exist for some time) to make it clear that it is the Exim ID that is
2757 referenced, not the Message-ID: header line.
2759 PH/05 Replaced all Tom's calls to snprintf() with calls to the internal
2760 string_format() function, because snprintf() does not exist on all
2763 PH/06 The use of forbid_filter_existstest now also locks out the use of the
2764 ${stat: expansion item.
2766 PH/07 Changed "SMTP protocol violation: synchronization error" into "SMTP
2767 protocol synchronization error", to keep the pedants happy.
2769 PH/08 Arrange for USE_INET_NTOA_FIX to be set in config.h for AIX systems as
2770 well as for IRIX systems, when gcc is being used. See the host.c source
2773 PH/09 Installed latest Cygwin configuration files from the Cygwin maintainer.
2775 PH/10 Named domain lists were not working if used in a queue_smtp_domains
2778 PH/11 Added support for the IGNOREQUOTA extension to LMTP, both to the lmtp
2779 transport and to the smtp transport in LMTP mode.
2781 TK/02 Remove one case of BASE64 error detection FTTB (undocumented anyway).
2783 PH/12 There was a missing call to search_tidyup() before the fork() in rda.c to
2784 run a filter in a subprocess. This could lead to confusion in subsequent
2785 lookups in the parent process. There should also be a search_tidyup() at
2786 the end of the subprocess.
2788 PH/13 Previously, if "verify = helo" was set in an ACL, the condition was true
2789 only if the host matched helo_try_verify_hosts, which caused the
2790 verification to occur when the EHLO/HELO command was issued. The ACL just
2791 tested the remembered result. Now, if a previous verification attempt has
2792 not happened, "verify = helo" does it there and then.
2794 JJ/01 exipick: added $message_exim_id variable (see 4.53-PH/04)
2796 TK/03 Fix log output including CR from clamd.
2798 PH/14 A reference to $reply_address when Reply-to: was empty and From: did not
2799 exist provoked a memory error which could cause a segfault.
2801 PH/15 Installed PCRE 6.2
2803 PH/17 Defined BIND_8_COMPAT in the Darwin os.h file.
2805 PH/18 Reversed 4.52/PH/17 because the HP-UX user found it wasn't the cause
2806 of the problem. Specifically, suggested +O2 rather than +O1 for the
2809 PH/19 Added sqlite_lock_timeout option (David Woodhouse's patch).
2811 PH/20 If a delivery was routed to a non-standard port by means of an SRV
2812 record, the port was not correctly logged when the outgoing_port log
2813 selector was set (it logged the transort's default port).
2815 PH/21 Added support for host-specific ports to manualroute, queryprogram,
2816 fallback_hosts, and "hosts" in the smtp transport.
2818 PH/22 If the log selector "outgoing_port" is set, the port is now also given on
2819 host errors such as "Connection refused".
2821 PH/23 Applied a patch to fix problems with exim-4.52 while doing radius
2822 authentication with radiusclient 0.4.9:
2824 - Error returned from rc_read_config was caught wrongly
2825 - Username/password not passed on to radius server due to wrong length.
2827 The presumption is that some radiusclient API changes for 4.51/PH/17
2828 were not taken care of correctly. The code is still untested by me (my
2829 Linux distribution still has 0.3.2 of radiusclient), but it was
2830 contributed by a Radius user.
2832 PH/24 When doing a callout, the value of $domain wasn't set correctly when
2833 expanding the "port" option of the smtp transport.
2835 TK/04 MIME ACL: Fix buffer underrun that occurs when EOF condition is met
2836 while reading a MIME header. Thanks to Tom Hughes for a patch.
2838 PH/24 Include config.h inside local_scan.h so that configuration settings are
2841 PH/25 Make $smtp_command_argument available after all SMTP commands. This means
2842 that in an ACL for RCPT (for example), you can examine exactly what was
2845 PH/26 Exim was recognizing IPv6 addresses of the form [IPv6:....] in EHLO
2846 commands, but it was not correctly comparing the address with the actual
2847 client host address. Thus, it would show the EHLO address in Received:
2848 header lines when this was not necessary.
2850 PH/27 Added the % operator to ${eval:}.
2852 PH/28 Exim tries to create and chdir to its spool directory when it starts;
2853 it should be ignoring failures (because with -C, for example, it has lost
2854 privilege). It wasn't ignoring creation failures other than "already
2857 PH/29 Added "crypteq" to the list of supported features that Exim outputs when
2860 PH/30 Fixed (presumably very longstanding) bug in exim_dbmbuild: if it failed
2861 because an input line was too long, either on its own, or by virtue of
2862 too many continuations, the temporary file was not being removed, and the
2863 return code was incorrect.
2865 PH/31 Missing "BOOL" in function definition in filtertest.c.
2867 PH/32 Applied Sieve patches from the maintainer.
2869 TK/05 Domainkeys: Accomodate for a minor API change in libdomainkeys 0.67.
2871 PH/33 Added "verify = not_blind".
2873 PH/34 There are settings for CHOWN_COMMAND and MV_COMMAND that can be used in
2874 Local/Makefile (with some defaults set). These are used in built scripts
2875 such as exicyclog, but they have never been used in the exim_install
2876 script (though there are many overriding facilities there). I have
2877 arranged that the exim_install script now takes note of these two
2880 PH/35 Installed configuration files for Dragonfly.
2882 PH/36 When a locally submitted message by a trusted user did not contain a
2883 From: header, and the sender address was obtained from -f or from an SMTP
2884 MAIL command, and the trusted user did not use -F to supply a sender
2885 name, $originator_name was incorrectly used when constructing a From:
2886 header. Furthermore, $originator_name was used for submission mode
2887 messages from external hosts without From: headers in a similar way,
2888 which is clearly wrong.
2890 PH/37 Added control=suppress_local_fixups.
2892 PH/38 When log_selector = +received_sender was set, and the addition of the
2893 sender made the log line's construction buffer exactly full, or one byte
2894 less than full, an overflow happened when the terminating "\n" was
2897 PH/39 Added a new log selector, "unknown_in_list", which provokes a log entry
2898 when the result of a list match is failure because a DNS lookup failed.
2900 PH/40 RM_COMMAND is now used in the building process.
2902 PH/41 Added a "distclean" target to the top-level Makefile; it deletes all
2903 the "build-* directories that it finds.
2905 PH/42 (But a TF fix): In a domain list, Exim incorrectly matched @[] if the IP
2906 address in a domain literal was a prefix of an interface address.
2908 PH/43 (Again a TF fix): In the dnslookup router, do not apply widen_domains
2909 when verifying a sender address, unless rewrite_headers is false.
2911 PH/44 Wrote a long comment about why errors_to addresses are verified as
2912 recipients, not senders.
2914 TF/01 Add missing LIBS=-lm to OS/Makefile-OpenBSD which was overlooked when
2915 the ratelimit ACL was added.
2917 PH/45 Added $smtp_command for the full command (cf $smtp_command_argument).
2919 PH/46 Added extra information about PostgreSQL errors to the error string.
2921 PH/47 Added an interface to a fake DNS resolver for use by the new test suite,
2922 avoiding the need to install special zones in a real server. This is
2923 backwards compatible; if it can't find the fake resolver, it drops back.
2924 Thus, both old and new test suites can be run.
2926 TF/02 Added util/ratelimit.pl
2928 TF/03 Minor fix to the ratelimit code to improve its behaviour in case the
2929 clock is set back in time.
2931 TF/04 Fix the ratelimit support in exim_fixdb. Patch provided by Brian
2932 Candler <B.Candler@pobox.com>.
2934 TF/05 The fix for PH/43 was not completely correct; widen_domains is always
2935 OK for addresses that are the result of redirections.
2937 PH/48 A number of further additions for the benefit of the new test suite,
2938 including a fake gethostbyname() that interfaces to the fake DNS resolver
2941 TF/06 The fix for widen_domains has also been applied to qualify_single and
2942 search_parents which are the other dnslookup options that can cause
2945 PH/49 Michael Haardt's randomized retrying, but as a separate retry parameter
2948 PH/50 Make never_users, trusted_users, admin_groups, trusted_groups expandable.
2950 TF/07 Exim produced the error message "an SRV record indicated no SMTP
2951 service" if it encountered an MX record with an empty target hostname.
2952 The message is now "an MX or SRV record indicated no SMTP service".
2954 TF/08 Change PH/13 introduced the possibility that verify=helo may defer,
2955 if the DNS of the sending site is misconfigured. This is quite a
2956 common situation. This change restores the behaviour of treating a
2957 helo verification defer as a failure.
2959 PH/51 If self=fail was set on a router, the bounce message did not include the
2960 actual error message.
2966 TF/01 Added support for Client SMTP Authorization. See NewStuff for details.
2968 PH/01 When a transport filter timed out in a pipe delivery, and the pipe
2969 command itself ended in error, the underlying message about the transport
2970 filter timeout was being overwritten with the pipe command error. Now the
2971 underlying error message should be appended to the second error message.
2973 TK/01 Fix poll() being unavailable on Mac OSX 10.2.
2975 PH/02 Reduce the amount of output that "make" produces by default. Full output
2976 can still be requested.
2978 PH/03 The warning log line about a condition test deferring for a "warn" verb
2979 was being output only once per connection, rather than after each
2980 occurrence (because it was using the same function as for successful
2981 "warn" verbs). This seems wrong, so I have changed it.
2983 TF/02 Two buglets in acl.c which caused Exim to read a few bytes of memory that
2984 it should not have, which might have caused a crash in the right
2985 circumstances, but probably never did.
2987 PH/04 Installed a modified version of Tony Finch's patch to make submission
2988 mode fix the return path as well as the Sender: header line, and to
2989 add a /name= option so that you can make the user's friendly name appear
2992 TF/03 Added the control = fakedefer ACL modifier.
2994 TF/04 Added the ratelimit ACL condition. See NewStuff for details. Thanks to
2995 Mark Lowes for thorough testing.
2997 TK/02 Rewrote SPF support to work with libspf2 versions >1.2.0.
2999 TK/03 Merged latest SRS patch from Miles Wilton.
3001 PH/05 There's a shambles in IRIX6 - it defines EX_OK in unistd.h which conflicts
3002 with the definition in sysexits.h (which is #included earlier).
3003 Fortunately, Exim does not actually use EX_OK. The code used to try to
3004 preserve the sysexits.h value, by assumimg that macro definitions were
3005 scanned for macro replacements. I have been disabused of this notion,
3006 so now the code just undefines EX_OK before #including unistd.h.
3008 PH/06 There is a timeout for writing blocks of data, set by, e.g. data_timeout
3009 in the smtp transport. When a block could not be written in a single
3010 write() function, the timeout was being re-applied to each part-write.
3011 This seems wrong - if the receiver was accepting one byte at a time it
3012 would take for ever. The timeout is now adjusted when this happens. It
3013 doesn't have to be particularly precise.
3015 TK/04 Added simple SPF lookup method in EXPERIMENTAL_SPF. See NewStuff for
3016 details. Thanks to Chris Webb <chris@arachsys.com> for the patch!
3018 PH/07 Added "fullpostmaster" verify option, which does a check to <postmaster>
3019 without a domain if the check to <postmaster@domain> fails.
3021 SC/01 Eximstats: added -xls and the ability to specify output files
3022 (patch written by Frank Heydlauf).
3024 SC/02 Eximstats: use FileHandles for outputing results.
3026 SC/03 Eximstats: allow any combination of xls, txt, and html output.
3028 SC/04 Eximstats: fixed display of large numbers with -nvr option
3030 SC/05 Eximstats: fixed merging of reports with empty tables.
3032 SC/06 Eximstats: added the -include_original_destination flag
3034 SC/07 Eximstats: removed tabs and trailing whitespace.
3036 TK/05 Malware: Improve on aveserver error handling. Patch from Alex Miller.
3038 TK/06 MBOX spool code: Add real "From " MBOX separator line
3039 so the .eml file is really in mbox format (even though
3040 most programs do not really care). Patch from Alex Miller.
3042 TK/07 MBOX spool code: Add X-Envelope-From: and X-Envelope-To: headers.
3043 The latter is generated from $received_to and is only set if the
3044 message has one envelope recipient. SA can use these headers,
3045 obviously out-of-the-box. Patch from Alex Miller.
3047 PH/08 The ${def test on a variable was returning false if the variable's
3048 value was "0", contrary to what the specification has always said!
3049 The result should be true unless the variable is empty.
3051 PH/09 The syntax error of a character other than { following "${if
3052 def:variable_name" (after optional whitespace) was not being diagnosed.
3053 An expansion such as ${if def:sender_ident:{xxx}{yyy}} in which an
3054 accidental colon was present, for example, could give incorrect results.
3056 PH/10 Tidied the code in a number of places where the st_size field of a stat()
3057 result is used (not including appendfile, where other changes are about
3060 PH/11 Upgraded appendfile so that quotas larger than 2G are now supported.
3061 This involved changing a lot of size variables from int to off_t. It
3062 should work with maildirs and everything.
3064 TK/08 Apply fix provided by Michael Haardt to prevent deadlock in case of
3065 spamd dying while we are connected to it.
3067 TF/05 Fixed a ${extract error message typo reported by Jeremy Harris
3070 PH/12 Applied Alex Kiernan's patch for the API change for the error callback
3071 function for BDB 4.3.
3073 PH/13 Changed auto_thaw such that it does not apply to bounce messages.
3075 PH/14 Imported PCRE 6.0; this was more than just a trivial operation because
3076 the sources for PCRE have been re-arranged and more files are now
3079 PH/15 The code I had for printing potentially long long variables in PH/11
3080 above was not the best (it lost precision). The length of off_t variables
3081 is now inspected at build time, and an appropriate printing format (%ld
3082 or %lld) is chosen and #defined by OFF_T_FMT. We also define LONGLONG_T
3083 to be "long long int" or "long int". This is needed for the internal
3084 formatting function string_vformat().
3086 PH/16 Applied Matthew Newton's patch to exicyclog: "If log_file_path is set in
3087 the configuration file to be ":syslog", then the script "guesses" where
3088 the logs files are, rather than using the compiled in default. In our
3089 case the guess is not the same as the compiled default, so the script
3090 suddenly stopped working when I started to use syslog. The patch checks
3091 to see if log_file_path is "". If so, it attempts to read it from exim
3092 with no configuration file to get the compiled in version, before it
3093 falls back to the previous guessing code."
3095 TK/09 Added "prvs" and "prvscheck" expansion items. These help a lot with
3096 implementing BATV in an Exim configuration. See NewStuff for the gory
3099 PH/17 Applied Michael Haardt's patch for HP-UX, affecting only the os.h and
3100 Makefile that are specific to HP-UX.
3102 PH/18 If the "use_postmaster" option was set for a recipient callout together
3103 with the "random" option, the postmaster address was used as the MAIL
3104 FROM address for the random test, but not for the subsequent recipient
3105 test. It is now used for both.
3107 PH/19 Applied Michael Haardt's patch to update Sieve to RFC3028bis. "The
3108 patch removes a few documentation additions to RFC 3028, because the
3109 latest draft now contains them. It adds the new en;ascii-case comparator
3110 and a new error check for 8bit text in MIME parts. Comparator and
3111 require names are now matched exactly. I enabled the subaddress
3112 extension, but it is not well tested yet (read: it works for me)."
3114 PH/20 Added macros for time_t as for off_t (see PH/15 above) and used them to
3115 rework some of the code of TK/09 above to avoid the hardwired use of
3116 "%lld" and "long long". Replaced the call to snprintf() with a call to
3119 PH/21 Added some other messages to those in 4.51/PH/42, namely "All relevant MX
3120 records point to non-existent hosts", "retry timeout exceeded", and
3121 "retry time not reached for any host after a long failure period".
3123 PH/22 Fixed some oversights/typos causing bugs when Exim is compiled with
3124 experimental DomainKeys support:
3126 (1) The filter variables $n0-$n9 and $sn0-$sn9 were broken.
3127 (2) On an error such as an illegally used "control", the wrong name for
3128 the control was given.
3130 These problems did NOT occur unless DomainKeys support was compiled.
3132 PH/23 Added daemon_startup_retries and daemon_startup_sleep.
3134 PH/24 Added ${if match_ip condition.
3136 PH/25 Put debug statements on either side of calls to EXIM_DBOPEN() for hints
3137 databases so that it will be absolutely obvious if a crash occurs in the
3138 DB library. This is a regular occurrence (often caused by mis-matched
3141 PH/26 Insert a lot of missing (void) casts for functions such as chown(),
3142 chmod(), fcntl(), sscanf(), and other functions from stdio.h. These were
3143 picked up on a user's system that detects such things. There doesn't seem
3144 to be a gcc warning option for this - only an attribute that has to be
3145 put on the function's prototype. It seems that in Fedora Core 4 they have
3146 set this on a number of new functions. No doubt there will be more in due
3149 PH/27 If a dnslookup or manualroute router is set with verify=only, it need not
3150 specify a transport. However, if an address that was verified by such a
3151 router was the subject of a callout, Exim crashed because it tried to
3152 read the rcpt_include_affixes from the non-existent transport. Now it
3153 just assumes that the setting of that option is false. This bug was
3154 introduced by 4.51/PH/31.
3156 PH/28 Changed -d+all to exclude +memory, because that information is very
3157 rarely of interest, but it makes the output a lot bigger. People tend to
3158 do -d+all out of habit.
3160 PH/29 Removed support for the Linux-libc5 build, as it is obsolete and the
3161 code in os-type was giving problems when libc.so lives in lib64, like on
3164 PH/30 Exim's DNS code uses the original T_xxx names for DNS record times. These
3165 aren't the modern standard, and it seems that some systems' include files
3166 don't always have them. Exim was already checking for some of the newer
3167 ones like T_AAAA, and defining it itself. I've added checks for all the
3168 record types that Exim uses.
3170 PH/31 When using GnuTLS, if the parameters cache file did not exist, Exim was
3171 not automatically generating a new one, as it is supposed to. This
3172 prevented TLS from working. If the file did exist, but contained invalid
3173 data, a new version was generated, as expected. It was only the case of a
3174 non-existent file that was broken.
3176 TK/10 Domainkeys: Fix a bug in verification that caused a crash in conjunction
3177 with a change in libdomainkeys > 0.64.
3179 TK/11 Domainkeys: Change the logic how the "testing" policy flag is retrieved
3180 from DNS. If the selector record carries the flag, it now has
3181 precedence over the domain-wide flag.
3183 TK/12 Cleared some compiler warnings related to SPF, SRS and DK code.
3185 PH/32 In mua_wrapper mode, if an smtp transport configuration error (such as
3186 the use of a port name that isn't defined in /etc/services) occurred, the
3187 message was deferred as in a normal delivery, and thus remained on the
3188 spool, instead of being failed because of the mua_wrapper setting. This
3189 is now fixed, and I tidied up some of the mua_wrapper messages at the
3192 SC/08 Eximstats: whilst parsing the mainlog(s), store information about
3193 the messages in a hash of arrays rather than using individual hashes.
3194 This is a bit cleaner and results in dramatic memory savings, albeit
3195 at a slight CPU cost.
3197 SC/09 Eximstats: added the -show_rt<list> and the -show_dt<list> flags
3198 as requested by Marc Sherman.
3200 SC/10 Eximstats: added histograms for user specified patterns as requested
3203 SC/11 Eximstats: v1.43 - bugfix for pattern histograms with -h0 specified.
3205 PH/33 Patch from the Cygwin maintainer to add "b" to all occurences of
3206 fopen() in the content-scanning modules that did not already have it.
3212 TK/01 Added Yahoo DomainKeys support via libdomainkeys. See
3213 doc/experimental-spec.txt for details. (http://domainkeys.sf.net)
3215 TK/02 Fix ACL "control" statement not being available in MIME ACL.
3217 TK/03 Fix ACL "regex" condition not being available in MIME ACL.
3219 PH/01 Installed a patch from the Sieve maintainer that allows -bf to be used
3220 to test Sieve filters that use "vacation".
3222 PH/02 Installed a slightly modified version of Nikos Mavrogiannopoulos' patch
3223 that changes the way the GnuTLS parameters are stored in the cache file.
3224 The new format can be generated externally. For backward compatibility,
3225 if the data in the cache doesn't make sense, Exim assumes it has read an
3226 old-format file, and it generates new data and writes a new file. This
3227 means that you can't go back to an older release without removing the
3230 PH/03 A redirect router that has both "unseen" and "one_time" set does not
3231 work if there are any delivery delays because "one_time" forces the
3232 parent to be marked "delivered", so its unseen clone is never tried
3233 again. For this reason, Exim now forbids the simultaneous setting of
3236 PH/04 Change 4.11/85 fixed an obscure bug concerned with addresses that are
3237 redirected to themselves ("homonym" addresses). Read the long ChangeLog
3238 entry if you want to know the details. The fix, however, neglected to
3239 consider the case when local delivery batching is involved. The test for
3240 "previously delivered" was not happening when checking to see if an
3241 address could be batched with a previous (undelivered) one; under
3242 certain circumstances this could lead to multiple deliveries to the same
3245 PH/05 Renamed the macro SOCKLEN_T as EXIM_SOCKLEN_T because AIX uses SOCKLEN_T
3246 in its include files, and this causes problems building Exim.
3248 PH/06 A number of "verify =" ACL conditions have no options (e.g. verify =
3249 header_syntax) but Exim was just ignoring anything given after a slash.
3250 In particular, this caused confusion with an attempt to use "verify =
3251 reverse_host_lookup/defer_ok". An error is now given when options are
3252 supplied for verify items that do not have them. (Maybe reverse_host_
3253 lookup should have a defer_ok option, but that's a different point.)
3255 PH/07 Increase the size of the buffer for incoming SMTP commands from 512 (as
3256 defined by RFC 821) to 2048, because there were problems with some AUTH
3257 commands, and RFC 1869 says the size should be increased for extended
3258 SMTP commands that take arguments.
3260 PH/08 Added ${dlfunc dynamically loaded function for expansion (code from Tony
3263 PH/09 Previously, an attempt to use ${perl when it wasn't compiled gave an
3264 "unknown" error; now it says that the functionality isn't in the binary.
3266 PH/10 Added a nasty fudge to try to recognize and flatten LDAP passwords in
3267 an address' error message when a string expansion fails (syntax or
3268 whatever). Otherwise the password may appear in the log. Following change
3269 PH/42 below, there is no longer a chance of it appearing in a bounce
3272 PH/11 Installed exipick version 20050225.0 from John Jetmore.
3274 PH/12 If the last host in a fallback_hosts list was multihomed, only the first
3275 of its addresses was ever tried. (Bugzilla bug #2.)
3277 PH/13 If "headers_add" in a transport didn't end in a newline, Exim printed
3278 the result incorrectly in the debug output. (It correctly added a newline
3279 to what was transported.)
3281 TF/01 Added $received_time.
3283 PH/14 Modified the default configuration to add an acl_smtp_data ACL, with
3284 commented out examples of how to interface to a virus scanner and to
3285 SpamAssassin. Also added commented examples of av_scanner and
3286 spamd_address settings.
3288 PH/15 Further to TK/02 and TK/03 above, tidied up the tables of what conditions
3289 and controls are allowed in which ACLs. There were a couple of minor
3290 errors. Some of the entries in the conditions table (which is a table of
3291 where they are NOT allowed) were getting very unwieldy; rewrote them as a
3292 negation of where the condition IS allowed.
3294 PH/16 Installed updated OS/os.c-cygwin from the Cygwin maintainer.
3296 PH/17 The API for radiusclient changed at release 0.4.0. Unfortunately, the
3297 header file does not have a version number, so I've had to invent a new
3298 value for RADIUS_LIB_TYPE, namely "RADIUSCLIENTNEW" to request the new
3299 API. The code is untested by me (my Linux distribution still has 0.3.2 of
3300 radiusclient), but it was contributed by a Radius user.
3302 PH/18 Installed Lars Mainka's patch for the support of CRL collections in
3303 files or directories, for OpenSSL.
3305 PH/19 When an Exim process that is running as root has to create an Exim log
3306 file, it does so in a subprocess that runs as exim:exim so as to get the
3307 ownership right at creation (otherwise, other Exim processes might see
3308 the file with the wrong ownership). There was no test for failure of this
3309 fork() call, which would lead to the process getting stuck as it waited
3310 for a non-existent subprocess. Forks do occasionally fail when resources
3311 run out. I reviewed all the other calls to fork(); they all seem to check
3314 PH/20 When checking for unexpected SMTP input at connect time (before writing
3315 the banner), Exim was not dealing correctly with a non-positive return
3316 from the read() function. If the client had disconnected by this time,
3317 the result was a log entry for a synchronization error with an empty
3318 string after "input=" when read() returned zero. If read() returned -1
3319 (an event I could not check), uninitialized data bytes were printed.
3320 There were reports of junk text (parts of files, etc) appearing after
3323 PH/21 Added acl_not_smtp_mime to allow for MIME scanning for non-SMTP messages.
3325 PH/22 Added support for macro redefinition, and (re)definition in between
3326 driver and ACL definitions.
3328 PH/23 The cyrus_sasl authenticator was expanding server_hostname, but then
3329 forgetting to use the resulting value; it was using the unexpanded value.
3331 PH/24 The cyrus_sasl authenticator was advertising mechanisms for which it
3332 hadn't been configured. The fix is from Juergen Kreileder, who
3333 understands it better than I do:
3335 "Here's what I see happening with three configured cyrus_sasl
3336 authenticators configured (plain, login, cram-md5):
3338 On startup auth_cyrus_sasl_init() gets called for each of these.
3339 This means three calls to sasl_listmech() without a specified mech_list.
3340 => SASL tests which mechs of all available mechs actually work
3341 => three warnings about OTP not working
3342 => the returned list contains: plain, login, cram-md5, digest-md5, ...
3344 With the patch, sasl_listmech() also gets called three times. But now
3345 SASL's mech_list option is set to the server_mech specified in the the
3346 authenticator. Or in other words, the answer from sasl_listmech()
3347 gets limited to just the mech you're testing for (which is different
3349 => the return list contains just 'plain' or 'login', 'cram-md5' or
3350 nothing depending on the value of ob->server_mech.
3352 I've just tested the patch: Authentication still works fine,
3353 unavailable mechs specified in the exim configuration are still
3354 caught, and the auth.log warnings about OTP are gone."
3356 PH/25 When debugging is enabled, the contents of the command line are added
3357 to the debugging output, even when log_selector=+arguments is not
3360 PH/26 Change scripts/os-type so that when "uname -s" returns just "GNU", the
3361 answer is "GNU", and only if the return is "GNU/something" is the answer
3364 PH/27 $acl_verify_message is now set immediately after the failure of a
3365 verification in an ACL, and so is available in subsequent modifiers. In
3366 particular, the message can be preserved by coding like this:
3368 warn !verify = sender
3369 set acl_m0 = $acl_verify_message
3371 Previously, $acl_verify_message was set only while expanding "message"
3372 and "log_message" when a very denied access.
3374 PH/28 Modified OS/os.c-Linux with
3376 -#ifndef OS_LOAD_AVERAGE
3377 +#if !defined(OS_LOAD_AVERAGE) && defined(__linux__)
3379 to make Exim compile on kfreebsd-gnu. (I'm totally confused about the
3380 nomenclature these days.)
3382 PH/29 Installed patch from the Sieve maintainer that adds the options
3383 sieve_useraddress and sieve_subaddress to the redirect router.
3385 PH/30 In these circumstances:
3386 . Two addresses routed to the same list of hosts;
3387 . First host does not offer TLS;
3388 . First host accepts first address;
3389 . First host gives temporary error to second address;
3390 . Second host offers TLS and a TLS session is established;
3391 . Second host accepts second address.
3392 Exim incorrectly logged both deliveries with the TLS parameters (cipher
3393 and peerdn, if requested) that were in fact used only for the second
3396 PH/31 When doing a callout as part of verifying an address, Exim was not paying
3397 attention to any local part prefix or suffix that was matched by the
3398 router that accepted the address. It now behaves in the same way as it
3399 does for delivery: the affixes are removed from the local part unless
3400 rcpt_include_affixes is set on the transport.
3402 PH/32 Add the sender address, as F=<...>, to the log line when logging a
3403 timeout during the DATA phase of an incoming message.
3405 PH/33 Sieve envelope tests were broken for match types other than :is. I have
3406 applied a patch sanctioned by the Sieve maintainer.
3408 PH/34 Change 4.50/80 broke Exim in that it could no longer handle cases where
3409 the uid or gid is negative. A case of a negative gid caused this to be
3410 noticed. The fix allows for either to be negative.
3412 PH/35 ACL_WHERE_MIME is now declared unconditionally, to avoid too much code
3413 clutter, but the tables that are indexed by ACL_WHERE_xxx values had been
3416 PH/36 The change PH/12 above was broken. Fixed it.
3418 PH/37 Exim used to check for duplicate addresses in the middle of routing, on
3419 the grounds that routing the same address twice would always produce the
3420 same answer. This might have been true once, but it is certainly no
3421 longer true now. Routing a child address may depend on the previous
3422 routing that produced that child. Some complicated redirection strategies
3423 went wrong when messages had multiple recipients, and made Exim's
3424 behaviour dependent on the order in which the addresses were given.
3426 I have moved the duplicate checking until after the routing is complete.
3427 Exim scans the addresses that are assigned to local and remote
3428 transports, and removes any duplicates. This means that more work will be
3429 done, as duplicates will always all be routed, but duplicates are
3430 presumably rare, so I don't expect this is of any significance.
3432 For deliveries to pipes, files, and autoreplies, the duplicate checking
3433 still happens during the routing process, since they are not going to be
3436 PH/38 Installed a patch from Ian Freislich, with the agreement of Tom Kistner.
3437 It corrects a timeout issue with spamd. This is Ian's comment: "The
3438 background is that sometimes spamd either never reads data from a
3439 connection it has accepted, or it never writes response data. The exiscan
3440 spam.[ch] uses a 3600 second timeout on spamd socket reads, further, it
3441 blindly assumes that writes won't block so it may never time out."
3443 PH/39 Allow G after quota size as well as K and M.
3445 PH/40 The value set for $authenticated_id in an authenticator may not contain
3446 binary zeroes or newlines because the value is written to log lines and
3447 to spool files. There was no check on this. Now the value is run through
3448 the string_printing() function so that such characters are converted to
3449 printable escape sequences.
3451 PH/41 $message_linecount is a new variable that contains the total number of
3452 lines in the message. Compare $body_linecount, which is the count for the
3455 PH/42 Exim no longer gives details of delivery errors for specific addresses in
3456 bounce and delay warning messages, except in certain special cases, which
3459 (a) An SMTP error message from a remote host;
3460 (b) A message specified in a :fail: redirection;
3461 (c) A message specified in a "fail" command in a system filter;
3462 (d) A message specified in a FAIL return from the queryprogram router;
3463 (e) A message specified by the cannot_route_message router option.
3465 In these cases only, Exim does include the error details in bounce and
3466 warning messages. There are also a few cases where bland messages such
3467 as "unrouteable address" or "local delivery error" are given.
3469 PH/43 $value is now also set for the "else" part of a ${run expansion.
3471 PH/44 Applied patch from the Sieve maintainer: "The vacation draft is still
3472 being worked on, but at least Exim now implements the latest version to
3475 PH/45 In a pipe transport, although a timeout while waiting for the pipe
3476 process to complete was treated as a delivery failure, a timeout while
3477 writing the message to the pipe was logged, but erroneously treated as a
3478 successful delivery. Such timeouts include transport filter timeouts. For
3479 consistency with the overall process timeout, these timeouts are now
3480 treated as errors, giving rise to delivery failures by default. However,
3481 there is now a new Boolean option for the pipe transport called
3482 timeout_defer, which, if set TRUE, converts the failures into defers for
3483 both kinds of timeout. A transport filter timeout is now identified in
3486 PH/46 The "scripts/Configure-config.h" script calls "make" at one point. On
3487 systems where "make" and "gmake" are different, calling "gmake" at top
3488 level broke things. I've arranged for the value of $(MAKE) to be passed
3489 from the Makefile to this script so that it can call the same version of
3493 A note about Exim versions 4.44 and 4.50
3494 ----------------------------------------
3496 Exim 4.50 was meant to be the next release after 4.43. It contains a lot of
3497 changes of various kinds. As a consequence, a big documentation update was
3498 needed. This delayed the release for rather longer than seemed good, especially
3499 in the light of a couple of (minor) security issues. Therefore, the changes
3500 that fixed bugs were backported into 4.43, to create a 4.44 maintenance
3501 release. So 4.44 and 4.50 are in effect two different branches that both start
3504 I have left the 4.50 change log unchanged; it contains all the changes since
3505 4.43. The change log for 4.44 is below; many of its items are identical to
3506 those for 4.50. This seems to be the most sensible way to preserve the
3507 historical information.
3513 1. Minor wording change to the doc/README.SIEVE file.
3515 2. Change 4.43/35 introduced a bug: if quota_filecount was set, the
3516 computation of the current number of files was incorrect.
3518 3. Closing a stable door: arrange to panic-die if setitimer() ever fails. The
3519 bug fixed in 4.43/37 would have been diagnosed quickly if this had been in
3522 4. Give more explanation in the error message when the command for a transport
3523 filter fails to execute.
3525 5. There are several places where Exim runs a non-Exim command in a
3526 subprocess. The SIGUSR1 signal should be disabled for these processes. This
3527 was being done only for the command run by the queryprogram router. It is
3528 now done for all such subprocesses. The other cases are: ${run, transport
3529 filters, and the commands run by the lmtp and pipe transports.
3531 6. Added CONFIGURE_GROUP build-time option.
3533 7. Some older OS have a limit of 256 on the maximum number of file
3534 descriptors. Exim was using setrlimit() to set 1000 as a large value
3535 unlikely to be exceeded. Change 4.43/17 caused a lot of logging on these
3536 systems. I've change it so that if it can't get 1000, it tries for 256.
3538 8. "control=submission" was allowed, but had no effect, in a DATA ACL. This
3539 was an oversight, and furthermore, ever since the addition of extra
3540 controls (e.g. 4.43/32), the checks on when to allow different forms of
3541 "control" were broken. There should now be diagnostics for all cases when a
3542 control that does not make sense is encountered.
3544 9. Added the /retain_sender option to "control=submission".
3546 10. $recipients is now available in the predata ACL (oversight).
3548 11. Tidy the search cache before the fork to do a delivery from a message
3549 received from the command line. Otherwise the child will trigger a lookup
3550 failure and thereby defer the delivery if it tries to use (for example) a
3551 cached ldap connection that the parent has called unbind on.
3553 12. If verify=recipient was followed by verify=sender in a RCPT ACL, the value
3554 of $address_data from the recipient verification was clobbered by the
3555 sender verification.
3557 13. The value of address_data from a sender verification is now available in
3558 $sender_address_data in subsequent conditions in the ACL statement.
3560 14. Added forbid_sieve_filter and forbid_exim_filter to the redirect router.
3562 15. Added a new option "connect=<time>" to callout options, to set a different
3565 16. If FIXED_NEVER_USERS was defined, but empty, Exim was assuming the uid 0
3566 was its contents. (It was OK if the option was not defined at all.)
3568 17. A "Completed" log line is now written for messages that are removed from
3569 the spool by the -Mrm option.
3571 18. New variables $sender_verify_failure and $recipient_verify_failure contain
3572 information about exactly what failed.
3574 19. Added -dd to debug only the daemon process.
3576 20. Incorporated Michael Haardt's patch to ldap.c for improving the way it
3577 handles timeouts, both on the server side and network timeouts. Renamed the
3578 CONNECT parameter as NETTIMEOUT (but kept the old name for compatibility).
3580 21. The rare case of EHLO->STARTTLS->HELO was setting the protocol to "smtp".
3581 It is now set to "smtps".
3583 22. $host_address is now set to the target address during the checking of
3584 ignore_target_hosts.
3586 23. When checking ignore_target_hosts for an ipliteral router, no host name was
3587 being passed; this would have caused $sender_host_name to have been used if
3588 matching the list had actually called for a host name (not very likely,
3589 since this list is usually IP addresses). A host name is now passed as
3592 24. Changed the calls that set up the SIGCHLD handler in the daemon to use the
3593 code that specifies a non-restarting handler (typically sigaction() in
3594 modern systems) in an attempt to fix a rare and obscure crash bug.
3596 25. Narrowed the window for a race in the daemon that could cause it to ignore
3597 SIGCHLD signals. This is not a major problem, because they are used only to
3598 wake it up if nothing else does.
3600 26. A malformed maildirsize file could cause Exim to calculate negative values
3601 for the mailbox size or file count. Odd effects could occur as a result.
3602 The maildirsize information is now recalculated if the size or filecount
3605 27. Added HAVE_SYS_STATVFS_H to the os.h file for Linux, as it has had this
3606 support for a long time. Removed HAVE_SYS_VFS_H.
3608 28. Installed the latest version of exipick from John Jetmore.
3610 29. In an address list, if the pattern was not a regular expression, an empty
3611 subject address (from a bounce message) matched only if the pattern was an
3612 empty string. Non-empty patterns were not even tested. This was the wrong
3613 because it is perfectly reasonable to use an empty address as part of a
3614 database query. An empty address is now tested by patterns that are
3615 lookups. However, all the other forms of pattern expect the subject to
3616 contain a local part and a domain, and therefore, for them, an empty
3617 address still always fails if the pattern is not itself empty.
3619 30. Exim went into a mad DNS loop when attempting to do a callout where the
3620 host was specified on an smtp transport, and looking it up yielded more
3621 than one IP address.
3623 31. Re-factored the code for checking spool and log partition space into a
3624 function that finds that data and another that does the check. The former
3625 is then used to implement four new variables: $spool_space, $log_space,
3626 $spool_inodes, and $log_inodes.
3628 32. The RFC2047 encoding function was originally intended for short strings
3629 such as real names; it was not keeping to the 75-character limit for
3630 encoded words that the RFC imposes. It now respects the limit, and
3631 generates multiple encoded words if necessary. To be on the safe side, I
3632 have increased the buffer size for the ${rfc2047: expansion operator from
3635 33. It is now permitted to omit both strings after an "if" condition; if the
3636 condition is true, the result is "true". As before, when the second string
3637 is omitted, a false condition yields an empty string. This makes it less
3638 cumbersome to write custom ACL and router conditions.
3640 34. Failure to deliver a bounce message always caused it to be frozen, even if
3641 there was an errors_to setting on the router. The errors_to setting is now
3644 35. If an IPv6 address is given for -bh or -bhc, it is now converted to the
3645 canonical form (fully expanded) before being placed in
3646 $sender_host_address.
3648 36. The table in the code that translates DNS record types into text (T_A to
3649 "A" for instance) was missing entries for NS and CNAME. It is just possible
3650 that this could have caused confusion if both these types were looked up
3651 for the same domain, because the text type is used as part of Exim's
3652 per-process caching. But the chance of anyone hitting this buglet seems
3655 37. The dnsdb lookup has been extended in a number of ways.
3657 (1) There is a new type, "zns", which walks up the domain tree until it
3658 finds some nameserver records. It should be used with care.
3660 (2) There is a new type, "mxh", which is like "mx" except that it returns
3661 just the host names, not the priorities.
3663 (3) It is now possible to give a list of domains (or IP addresses) to be
3664 looked up. The behaviour when one of the lookups defers can be
3665 controlled by a keyword.
3667 (4) It is now possible to specify the separator character for use when
3668 multiple records are returned.
3670 38. The dnslists ACL condition has been extended: it is now possible to supply
3671 a list of IP addresses and/or domains to be looked up in a particular DNS
3674 39. Added log_selector=+queue_time_overall.
3676 40. When running the queue in the test harness, wait just a tad after forking a
3677 delivery process, to get repeatability of debugging output.
3679 41. Include certificate and key file names in error message when GnuTLS fails
3680 to set them up, because the GnuTLS error message doesn't include the name
3681 of the failing file when there is a problem reading it.
3683 42. Allow both -bf and -bF in the same test run.
3685 43. Did the same fix as 41 above for OpenSSL, which had the same infelicity.
3687 44. The "Exiscan patch" is now merged into the mainline Exim source.
3689 45. Sometimes the final signoff response after QUIT could fail to get
3690 transmitted in the non-TLS case. Testing !tls_active instead of tls_active
3691 < 0 before doing a fflush(). This bug looks as though it goes back to the
3692 introduction of TLS in release 3.20, but "sometimes" must have been rare
3693 because the tests only now provoked it.
3695 46. Reset the locale to "C" after calling embedded Perl, in case it was changed
3696 (this can affect the format of dates).
3698 47. exim_tidydb, when checking for the continued existence of a message for
3699 which it has found a message-specific retry record, was not finding
3700 messages that were in split spool directories. Consequently, it was
3701 deleting retry records that should have stayed in existence.
3703 48. Steve fixed some bugs in eximstats.
3705 49. The SPA authentication driver was not abandoning authentication and moving
3706 on to the next authenticator when an expansion was forced to fail,
3707 contradicting the general specification for all authenticators. Instead it
3708 was generating a temporary error. It now behaves as specified.
3710 50. The default ordering of permitted cipher suites for GnuTLS was pessimal
3711 (the order specifies the preference for clients). The order is now AES256,
3712 AES128, 3DES, ARCFOUR128.
3714 51. Small patch to Sieve code - explicitly set From: when generating an
3717 52. Exim crashed if a remote delivery caused a very long error message to be
3718 recorded - for instance if somebody sent an entire SpamAssassin report back
3719 as a large number of 550 error lines. This bug was coincidentally fixed by
3720 increasing the size of one of Exim's internal buffers (big_buffer) that
3721 happened as part of the Exiscan merge. However, to be on the safe side, I
3722 have made the code more robust (and fixed the comments that describe what
3725 53. Now that there can be additional text after "Completed" in log lines (if
3726 the queue_time_overall log selector is set), a one-byte patch to exigrep
3727 was needed to allow it to recognize "Completed" as not the last thing in
3730 54. The LDAP lookup was not handling a return of LDAP_RES_SEARCH_REFERENCE. A
3731 patch that reportedly fixes this has been added. I am not expert enough to
3732 create a test for it. This is what the patch creator wrote:
3734 "I found a little strange behaviour of ldap code when working with
3735 Windows 2003 AD Domain, where users was placed in more than one
3736 Organization Units. When I tried to give exim partial DN, the exit code
3737 of ldap_search was unknown to exim because of LDAP_RES_SEARCH_REFERENCE.
3738 But simultaneously result of request was absolutely normal ldap result,
3739 so I produce this patch..."
3741 Later: it seems that not all versions of LDAP support LDAP_RES_SEARCH_
3742 REFERENCE, so I have modified the code to exclude the patch when that macro
3745 55. Some experimental protocols are using DNS PTR records for new purposes. The
3746 keys for these records are domain names, not reversed IP addresses. The
3747 dnsdb PTR lookup now tests whether its key is an IP address. If not, it
3748 leaves it alone. Component reversal etc. now happens only for IP addresses.
3751 56. Improve error message when ldap_search() fails in OpenLDAP or Solaris LDAP.
3753 57. Double the size of the debug message buffer (to 2048) so that more of very
3754 long debug lines gets shown.
3756 58. The exicyclog utility now does better if the number of log files to keep
3757 exceeds 99. In this case, it numbers them 001, 002 ... instead of 01, 02...
3759 59. Two changes related to the smtp_active_hostname option:
3761 (1) $smtp_active_hostname is now available as a variable.
3762 (2) The default for smtp_banner uses $smtp_active_hostname instead
3763 of $primary_hostname.
3765 60. The host_aton() function is supposed to be passed a string that is known
3766 to be a valid IP address. However, in the case of IPv6 addresses, it was
3767 not checking this. This is a hostage to fortune. Exim now panics and dies
3768 if the condition is not met. A case was found where this could be provoked
3769 from a dnsdb PTR lookup with an IPv6 address that had more than 8
3770 components; fortuitously, this particular loophole had already been fixed
3771 by change 4.50/55 above.
3773 If there are any other similar loopholes, the new check in host_aton()
3774 itself should stop them being exploited. The report I received stated that
3775 data on the command line could provoke the exploit when Exim was running as
3776 exim, but did not say which command line option was involved. All I could
3777 find was the use of -be with a bad dnsdb PTR lookup, and in that case it is
3778 running as the user.
3781 61. There was a buffer overflow vulnerability in the SPA authentication code
3782 (which came originally from the Samba project). I have added a test to the
3783 spa_base64_to_bits() function which I hope fixes it.
3786 62. Configuration update for GNU/Hurd and variations. Updated Makefile-GNU and
3787 os.h-GNU, and added configuration files for GNUkFreeBSD and GNUkNetBSD.
3789 63. The daemon start-up calls getloadavg() while still root for those OS that
3790 need the first call to be done as root, but it missed one case: when
3791 deliver_queue_load_max is set with deliver_drop_privilege. This is
3792 necessary for the benefit of the queue runner, because there is no re-exec
3793 when deliver_drop_privilege is set.
3795 64. A call to exiwhat cut short delays set up by "delay" modifiers in ACLs.
3796 This has been fixed.
3798 65. Caching of lookup data for "hosts =" ACL conditions, when a named host list
3799 was in use, was not putting the data itself into the right store pool;
3800 consequently, it could be overwritten for a subsequent message in the same
3801 SMTP connection. (Fix 4.40/11 dealt with the non-cache case, but overlooked
3804 66. Added hosts_max_try_hardlimit to the smtp transport, default 50.
3806 67. The string_is_ip_address() function returns 0, 4, or 6, for "no an IP
3807 address", "IPv4 address", and "IPv6 address", respectively. Some calls of
3808 the function were treating the return as a boolean value, which happened to
3809 work because 0=false and not-0=true, but is not correct code.
3811 68. The host_aton() function was not handling scoped IPv6 addresses (those
3812 with, for example, "%eth0" on the end) correctly.
3814 69. Fixed some compiler warnings in acl.c for the bitmaps specified with
3815 negated items (that is, ~something) in unsigned ints. Some compilers
3816 apparently mutter when there is no cast.
3818 70. If an address verification called from an ACL failed, and did not produce a
3819 user-specific message (i.e. there was only a "system" message), nothing was
3820 put in $acl_verify_message. In this situation, it now puts the system
3823 71. Change 4.23/11 added synchronization checking at the start of an SMTP
3824 session; change 4.31/43 added the unwanted input to the log line - except
3825 that it did not do this in the start of session case. It now does.
3827 72. After a timeout in a callout SMTP session, Exim still sent a QUIT command.
3828 This is wrong and can cause the other end to generate a synchronization
3829 error if it is another Exim or anything else that does the synchronization
3830 check. A QUIT command is no longer sent after a timeout.
3832 73. $host_lookup_deferred has been added, to make it easier to detect DEFERs
3833 during host lookups.
3835 74. The defer_ok option of callout verification was not working if it was used
3836 when verifying addresses in header lines, that is, for this case:
3838 verify = header_sender/callout=defer_ok
3840 75. A backgrounded daemon closed stdin/stdout/stderr on entry; this meant that
3841 those file descriptors could be used for SMTP connections. If anything
3842 wrote to stderr (the example that came up was "warn" in embedded Perl), it
3843 could be sent to the SMTP client, causing chaos. The daemon now opens
3844 stdin, stdout, and stderr to /dev/null when it puts itself into the
3847 76. Arrange for output from Perl's "warn" command to be written to Exim's main
3848 log by default. The user can override this with suitable Perl magic.
3850 77. The use of log_message on a "discard" ACL verb, which is supposed to add to
3851 the log message when discard triggers, was not working for the DATA ACL or
3852 for the non-SMTP ACL.
3854 78. Error message wording change in sieve.c.
3856 79. If smtp_accept_max_per_host was set, the number of connections could be
3857 restricted to fewer than expected, because the daemon was trying to set up
3858 a new connection before checking whether the processes handling previous
3859 connections had finished. The check for completed processes is now done
3860 earlier. On busy systems, this bug wouldn't be noticed because something
3861 else would have woken the daemon, and it would have reaped the completed
3864 80. If a message was submitted locally by a user whose login name contained one
3865 or more spaces (ugh!), the spool file that Exim wrote was not re-readable.
3866 It caused a spool format error. I have fixed the spool reading code. A
3867 related problem was that the "from" clause in the Received: line became
3868 illegal because of the space(s). It is now covered by ${quote_local_part.
3870 81. Included the latest eximstats from Steve (adds average sizes to HTML Top
3873 82. Updated OS/Makefile-AIX as per message from Mike Meredith.
3875 83. Patch from Sieve maintainer to fix unterminated string problem in
3876 "vacation" handling.
3878 84. Some minor changes to the Linux configuration files to help with other
3879 OS variants using glibc.
3881 85. One more patch for Sieve to update vacation handling to latest spec.
3884 ----------------------------------------------------
3885 See the note above about the 4.44 and 4.50 releases.
3886 ----------------------------------------------------
3892 1. Change 4.43/35 introduced a bug that caused file counts to be
3893 incorrectly computed when quota_filecount was set in an appendfile
3896 2. Closing a stable door: arrange to panic-die if setitimer() ever fails. The
3897 bug fixed in 4.43/37 would have been diagnosed quickly if this had been in
3900 3. Give more explanation in the error message when the command for a transport
3901 filter fails to execute.
3903 4. There are several places where Exim runs a non-Exim command in a
3904 subprocess. The SIGUSR1 signal should be disabled for these processes. This
3905 was being done only for the command run by the queryprogram router. It is
3906 now done for all such subprocesses. The other cases are: ${run, transport
3907 filters, and the commands run by the lmtp and pipe transports.
3909 5. Some older OS have a limit of 256 on the maximum number of file
3910 descriptors. Exim was using setrlimit() to set 1000 as a large value
3911 unlikely to be exceeded. Change 4.43/17 caused a lot of logging on these
3912 systems. I've change it so that if it can't get 1000, it tries for 256.
3914 6. "control=submission" was allowed, but had no effect, in a DATA ACL. This
3915 was an oversight, and furthermore, ever since the addition of extra
3916 controls (e.g. 4.43/32), the checks on when to allow different forms of
3917 "control" were broken. There should now be diagnostics for all cases when a
3918 control that does not make sense is encountered.
3920 7. $recipients is now available in the predata ACL (oversight).
3922 8. Tidy the search cache before the fork to do a delivery from a message
3923 received from the command line. Otherwise the child will trigger a lookup
3924 failure and thereby defer the delivery if it tries to use (for example) a
3925 cached ldap connection that the parent has called unbind on.
3927 9. If verify=recipient was followed by verify=sender in a RCPT ACL, the value
3928 of $address_data from the recipient verification was clobbered by the
3929 sender verification.
3931 10. If FIXED_NEVER_USERS was defined, but empty, Exim was assuming the uid 0
3932 was its contents. (It was OK if the option was not defined at all.)
3934 11. A "Completed" log line is now written for messages that are removed from
3935 the spool by the -Mrm option.
3937 12. $host_address is now set to the target address during the checking of
3938 ignore_target_hosts.
3940 13. When checking ignore_target_hosts for an ipliteral router, no host name was
3941 being passed; this would have caused $sender_host_name to have been used if
3942 matching the list had actually called for a host name (not very likely,
3943 since this list is usually IP addresses). A host name is now passed as
3946 14. Changed the calls that set up the SIGCHLD handler in the daemon to use the
3947 code that specifies a non-restarting handler (typically sigaction() in
3948 modern systems) in an attempt to fix a rare and obscure crash bug.
3950 15. Narrowed the window for a race in the daemon that could cause it to ignore
3951 SIGCHLD signals. This is not a major problem, because they are used only to
3952 wake it up if nothing else does.
3954 16. A malformed maildirsize file could cause Exim to calculate negative values
3955 for the mailbox size or file count. Odd effects could occur as a result.
3956 The maildirsize information is now recalculated if the size or filecount
3959 17. Added HAVE_SYS_STATVFS_H to the os.h file for Linux, as it has had this
3960 support for a long time. Removed HAVE_SYS_VFS_H.
3962 18. Updated exipick to current release from John Jetmore.
3964 19. Allow an empty sender to be matched against a lookup in an address list.
3965 Previously the only cases considered were a regular expression, or an
3968 20. Exim went into a mad DNS lookup loop when doing a callout where the
3969 host was specified on the transport, if the DNS lookup yielded more than
3972 21. The RFC2047 encoding function was originally intended for short strings
3973 such as real names; it was not keeping to the 75-character limit for
3974 encoded words that the RFC imposes. It now respects the limit, and
3975 generates multiple encoded words if necessary. To be on the safe side, I
3976 have increased the buffer size for the ${rfc2047: expansion operator from
3979 22. Failure to deliver a bounce message always caused it to be frozen, even if
3980 there was an errors_to setting on the router. The errors_to setting is now
3983 23. If an IPv6 address is given for -bh or -bhc, it is now converted to the
3984 canonical form (fully expanded) before being placed in
3985 $sender_host_address.
3987 24. Updated eximstats to version 1.33
3989 25. Include certificate and key file names in error message when GnuTLS fails
3990 to set them up, because the GnuTLS error message doesn't include the name
3991 of the failing file when there is a problem reading it.
3993 26. Expand error message when OpenSSL has problems setting up cert/key files.
3996 27. Reset the locale to "C" after calling embedded Perl, in case it was changed
3997 (this can affect the format of dates).
3999 28. exim_tidydb, when checking for the continued existence of a message for
4000 which it has found a message-specific retry record, was not finding
4001 messages that were in split spool directories. Consequently, it was
4002 deleting retry records that should have stayed in existence.
4004 29. eximstats updated to version 1.35
4005 1.34 - allow eximstats to parse syslog lines as well as mainlog lines
4006 1.35 - bugfix such that pie charts by volume are generated correctly
4008 30. The SPA authentication driver was not abandoning authentication and moving
4009 on to the next authenticator when an expansion was forced to fail,
4010 contradicting the general specification for all authenticators. Instead it
4011 was generating a temporary error. It now behaves as specified.
4013 31. The default ordering of permitted cipher suites for GnuTLS was pessimal
4014 (the order specifies the preference for clients). The order is now AES256,
4015 AES128, 3DES, ARCFOUR128.
4017 31. Small patch to Sieve code - explicitly set From: when generating an
4020 32. Exim crashed if a remote delivery caused a very long error message to be
4021 recorded - for instance if somebody sent an entire SpamAssassin report back
4022 as a large number of 550 error lines. This bug was coincidentally fixed by
4023 increasing the size of one of Exim's internal buffers (big_buffer) that
4024 happened as part of the Exiscan merge. However, to be on the safe side, I
4025 have made the code more robust (and fixed the comments that describe what
4028 33. Some experimental protocols are using DNS PTR records for new purposes. The
4029 keys for these records are domain names, not reversed IP addresses. The
4030 dnsdb PTR lookup now tests whether its key is an IP address. If not, it
4031 leaves it alone. Component reversal etc. now happens only for IP addresses.
4034 34. The host_aton() function is supposed to be passed a string that is known
4035 to be a valid IP address. However, in the case of IPv6 addresses, it was
4036 not checking this. This is a hostage to fortune. Exim now panics and dies
4037 if the condition is not met. A case was found where this could be provoked
4038 from a dnsdb PTR lookup with an IPv6 address that had more than 8
4039 components; fortuitously, this particular loophole had already been fixed
4040 by change 4.50/55 or 4.44/33 above.
4042 If there are any other similar loopholes, the new check in host_aton()
4043 itself should stop them being exploited. The report I received stated that
4044 data on the command line could provoke the exploit when Exim was running as
4045 exim, but did not say which command line option was involved. All I could
4046 find was the use of -be with a bad dnsdb PTR lookup, and in that case it is
4047 running as the user.
4050 35. There was a buffer overflow vulnerability in the SPA authentication code
4051 (which came originally from the Samba project). I have added a test to the
4052 spa_base64_to_bits() function which I hope fixes it.
4055 36. The daemon start-up calls getloadavg() while still root for those OS that
4056 need the first call to be done as root, but it missed one case: when
4057 deliver_queue_load_max is set with deliver_drop_privilege. This is
4058 necessary for the benefit of the queue runner, because there is no re-exec
4059 when deliver_drop_privilege is set.
4061 37. Caching of lookup data for "hosts =" ACL conditions, when a named host list
4062 was in use, was not putting the data itself into the right store pool;
4063 consequently, it could be overwritten for a subsequent message in the same
4064 SMTP connection. (Fix 4.40/11 dealt with the non-cache case, but overlooked
4067 38. Sometimes the final signoff response after QUIT could fail to get
4068 transmitted in the non-TLS case. Testing !tls_active instead of tls_active
4069 < 0 before doing a fflush(). This bug looks as though it goes back to the
4070 introduction of TLS in release 3.20, but "sometimes" must have been rare
4071 because the tests only now provoked it.
4077 1. Fixed a longstanding but relatively impotent bug: a long time ago, before
4078 PIPELINING, the function smtp_write_command() used to return TRUE or FALSE.
4079 Now it returns an integer. A number of calls were still expecting a T/F
4080 return. Fortuitously, in all cases, the tests worked in OK situations,
4081 which is the norm. However, things would have gone wrong on any write
4082 failures on the smtp file descriptor. This function is used when sending
4083 messages over SMTP and also when doing verify callouts.
4085 2. When Exim is called to do synchronous delivery of a locally submitted
4086 message (the -odf or -odi options), it no longer closes stderr before doing
4089 3. Implemented the mua_wrapper option.
4091 4. Implemented mx_fail_domains and srv_fail_domains for the dnslookup router.
4093 5. Implemented the functions header_remove(), header_testname(),
4094 header_add_at_position(), and receive_remove_recipient(), and exported them
4097 6. If an ACL "warn" statement specified the addition of headers, Exim already
4098 inserted X-ACL-Warn: at the start if there was no header name. However, it
4099 was not making this test for the second and subsequent header lines if
4100 there were newlines in the string. This meant that an invalid header could
4101 be inserted if Exim was badly configured.
4103 7. Allow an ACL "warn" statement to add header lines at the start or after all
4104 the Received: headers, as well as at the end.
4106 8. Added the rcpt_4xx retry error code.
4108 9. Added postmaster_mailfrom=xxx to callout verification option.
4110 10. Added mailfrom=xxxx to the callout verification option, for verify=
4113 11. ${substr_1_:xxxx} and ${substr__3:xxxx} are now diagnosed as syntax errors
4114 (they previously behaved as ${substr_1_0:xxxx} and ${substr:_0_3:xxxx}).
4116 12. Inserted some casts to stop certain compilers warning when using pointer
4117 differences as field lengths or precisions in printf-type calls (mostly
4118 affecting debugging statements).
4120 13. Added optional readline() support for -be (dynamically loaded).
4122 14. Obscure bug fix: if a message error (e.g. 4xx to MAIL) happened within the
4123 same clock tick as a message's arrival, so that its received time was the
4124 same as the "first fail" time on the retry record, and that message
4125 remained on the queue past the ultimate address timeout, every queue runner
4126 would try a delivery (because it was past the ultimate address timeout) but
4127 after another failure, the ultimate address timeout, which should have then
4128 bounced the address, did not kick in. This was a "< instead of <=" error;
4129 in most cases the first failure would have been in the next clock tick
4130 after the received time, and all would be well.
4132 15. The special items beginning with @ in domain lists (e.g. @mx_any) were not
4133 being recognized when the domain list was tested by the match_domain
4134 condition in an expansion string.
4136 16. Added the ${str2b64: operator.
4138 17. Exim was always calling setrlimit() to set a large limit for the number of
4139 processes, without checking whether the existing limit was already
4140 adequate. (It did check for the limit on file descriptors.) Furthermore,
4141 errors from getrlimit() and setrlimit() were being ignored. Now they are
4142 logged to the main and panic logs, but Exim does carry on, to try to do its
4143 job under whatever limits there are.
4145 18. Imported PCRE 5.0.
4147 19. Trivial typo in log message " temporarily refused connection" (the leading
4150 20. If the log selector return_path_on_delivery was set and an address was
4151 redirected to /dev/null, the delivery process crashed because it assumed
4152 that a return path would always be set for a "successful" delivery. In this
4153 case, the whole delivery is bypassed as an optimization, and therefore no
4156 21. Internal re-arrangement: the function for sending a challenge and reading
4157 a response while authentication was assuming a zero-terminated challenge
4158 string. It's now changed to take a pointer and a length, to allow for
4159 binary data in such strings.
4161 22. Added the cyrus_sasl authenticator (code supplied by MBM).
4163 23. Exim was not respecting finduser_retries when seeking the login of the
4164 uid under which it was called; it was always trying 10 times. (The default
4165 setting of finduser_retries is zero.) Also, it was sleeping after the final
4166 failure, which is pointless.
4168 24. Implemented tls_on_connect_ports.
4170 25. Implemented acl_smtp_predata.
4172 26. If the domain in control=submission is set empty, Exim assumes that the
4173 authenticated id is a complete email address when it generates From: or
4174 Sender: header lines.
4176 27. Added "#define SOCKLEN_T int" to OS/os.h-SCO and OS/os.h-SCO_SV. Also added
4177 definitions to OS/Makefile-SCO and OS/Makefile-SCO_SV that put basename,
4178 chown and chgrp in /bin and hostname in /usr/bin.
4180 28. Exim was keeping the "process log" file open after each use, just as it
4181 does for the main log. This opens the possibility of it remaining open for
4182 long periods when the USR1 signal hits a daemon. Occasional processlog
4183 errors were reported, that could have been caused by this. Anyway, it seems
4184 much more sensible not to leave this file open at all, so that is what now
4187 29. The long-running daemon process does not normally write to the log once it
4188 has entered its main loop, and it closes the log before doing so. This is
4189 so that log files can straightforwardly be renamed and moved. However,
4190 there are a couple of unusual error situations where the daemon does write
4191 log entries, and I had neglected to close the log afterwards.
4193 30. The text of an SMTP error response that was received during a remote
4194 delivery was being truncated at 512 bytes. This is too short for some of
4195 the long messages that one sometimes sees. I've increased the limit to
4198 31. It is now possible to make retry rules that apply only when a message has a
4199 specific sender, in particular, an empty sender.
4201 32. Added "control = enforce_sync" and "control = no_enforce_sync". This makes
4202 it possible to be selective about when SMTP synchronization is enforced.
4204 33. Added "control = caseful_local_part" and "control = "caselower_local_part".
4206 32. Implemented hosts_connection_nolog.
4208 33. Added an ACL for QUIT.
4210 34. Setting "delay_warning=" to disable warnings was not working; it gave a
4213 35. Added mailbox_size and mailbox_filecount to appendfile.
4215 36. Added control = no_multiline_responses to ACLs.
4217 37. There was a bug in the logic of the code that waits for the clock to tick
4218 in the case where the clock went backwards by a substantial amount such
4219 that the microsecond fraction of "now" was more than the microsecond
4220 fraction of "then" (but the whole seconds number was less).
4222 38. Added support for the libradius Radius client library this is found on
4223 FreeBSD (previously only the radiusclient library was supported).
4229 1. When certain lookups returned multiple values in the form name=value, the
4230 quoting of the values was not always being done properly. Specifically:
4231 (a) If the value started with a double quote, but contained no whitespace,
4233 (b) If the value contained whitespace other than a space character (i.e.
4234 tabs or newlines or carriage returns) it was not quoted.
4235 This fix has been applied to the mysql and pgsql lookups by writing a
4236 separate quoting function and calling it from the lookup code. The fix
4237 should probably also be applied to nisplus, ibase and oracle lookups, but
4238 since I cannot test any of those, I have not disturbed their existing code.
4240 2. A hit in the callout cache for a specific address caused a log line with no
4241 reason for rejecting RCPT. Now it says "Previous (cached) callout
4242 verification failure".
4244 3. There was an off-by-one bug in the queryprogram router. An over-long
4245 return line was truncated at 256 instead of 255 characters, thereby
4246 overflowing its buffer with the terminating zero. As well as fixing this, I
4247 have increased the buffer size to 1024 (and made a note to document this).
4249 4. If an interrupt, such as the USR1 signal that is send by exiwhat, arrives
4250 when Exim is waiting for an SMTP response from a remote server, Exim
4251 restarts its select() call on the socket, thereby resetting its timeout.
4252 This is not a problem when such interrupts are rare. Somebody set up a cron
4253 job to run exiwhat every 2 minutes, which is less than the normal select()
4254 timeout (5 or 10 minutes). This meant that the select() timeout never
4255 kicked in because it was always reset. I have fixed this by comparing the
4256 time when an interrupt arrives with the time at the start of the first call
4257 to select(). If more time than the timeout has elapsed, the interrupt is
4258 treated as a timeout.
4260 5. Some internal re-factoring in preparation for the addition of Sieve
4261 extensions (by MH). In particular, the "personal" test is moved to a
4262 separate function, and given an option for scanning Cc: and Bcc: (which is
4263 not set for Exim filters).
4265 6. When Exim created an email address using the login of the caller as the
4266 local part (e.g. when creating a From: or Sender: header line), it was not
4267 quoting the local part when it contained special characters such as @.
4269 7. Installed new OpenBSD configuration files.
4271 8. Reworded some messages for syntax errors in "and" and "or" conditions to
4272 try to make them clearer.
4274 9. Callout options, other than the timeout value, were being ignored when
4275 verifying sender addresses in header lines. For example, when using
4277 verify = header_sender/callout=no_cache
4279 the cache was (incorrectly) being used.
4281 10. Added a missing instance of ${EXE} to the exim_install script; this affects
4282 only the Cygwin environment.
4284 11. When return_path_on_delivery was set as a log selector, if different remote
4285 addresses in the same message used different return paths and parallel
4286 remote delivery occurred, the wrong values would sometimes be logged.
4287 (Whenever a remote delivery process finished, the return path value from
4288 the most recently started remote delivery process was logged.)
4290 12. RFC 3848 specifies standard names for the "with" phrase in Received: header
4291 lines when AUTH and/or TLS are in use. This is the "received protocol"
4292 field. Exim used to use "asmtp" for authenticated SMTP, without any
4293 indication (in the protocol name) for TLS use. Now it follows the RFC and
4294 uses "esmtpa" if the connection is authenticated, "esmtps" if it is
4295 encrypted, and "esmtpsa" if it is both encrypted and authenticated. These
4296 names appear in log lines as well as in Received: header lines.
4298 13. Installed MH's patches for Sieve to add the "copy" and "vacation"
4299 extensions, and comparison tests, and to fix some bugs.
4301 14. Changes to the "personal" filter test:
4303 (1) The test was buggy in that it was just doing the equivalent of
4304 "contains" tests on header lines. For example, if a user's address was
4305 anne@some.where, the "personal" test would incorrectly be true for
4307 To: susanne@some.where
4309 This test is now done by extracting each address from the header in turn,
4310 and checking the entire address. Other tests that are part of "personal"
4311 are now done using regular expressions (for example, to check local parts
4312 of addresses in From: header lines).
4314 (2) The list of non-personal local parts in From: addresses has been
4315 extended to include "listserv", "majordomo", "*-request", and "owner-*",
4316 taken from the Sieve specification recommendations.
4318 (3) If the message contains any header line starting with "List-" it is
4319 treated as non-personal.
4321 (4) The test for "circular" in the Subject: header line has been removed
4322 because it now seems ill-conceived.
4324 15. Minor typos in src/EDITME comments corrected.
4326 16. Installed latest exipick from John Jetmore.
4328 17. If headers_add on a router specified a text string that was too long for
4329 string_sprintf() - that is, longer than 8192 bytes - Exim panicked. The use
4330 of string_sprintf() is now avoided.
4332 18. $message_body_size was not set (it was always zero) when running the DATA
4333 ACL and the local_scan() function.
4335 19. For the "mail" command in an Exim filter, no default was being set for
4336 the once_repeat time, causing a random time value to be used if "once" was
4337 specified. (If the value happened to be <= 0, no repeat happened.) The
4338 default is now 0s, meaning "never repeat". The "vacation" command was OK
4339 (its default is 7d). It's somewhat surprising nobody ever noticed this bug
4340 (I found it when inspecting the code).
4342 20. There is now an overall timeout for performing a callout verification. It
4343 defaults to 4 times the callout timeout, which applies to individual SMTP
4344 commands during the callout. The overall timeout applies when there is more
4345 than one host that can be tried. The timeout is checked before trying the
4346 next host. This prevents very long delays if there are a large number of
4347 hosts and all are timing out (e.g. when the network connections are timing
4348 out). The value of the overall timeout can be changed by specifying an
4349 additional sub-option for "callout", called "maxwait". For example:
4351 verify = sender/callout=5s,maxwait=20s
4353 21. Add O_APPEND to the open() call for maildirsize files (Exim already seeks
4354 to the end before writing, but this should make it even safer).
4356 22. Exim was forgetting that it had advertised PIPELINING for the second and
4357 subsequent messages on an SMTP connection. It was also not resetting its
4358 memory on STARTTLS and an internal HELO.
4360 23. When Exim logs an SMTP synchronization error within a session, it now
4361 records whether PIPELINING has been advertised or not.
4363 24. Added 3 instances of "(long int)" casts to time_t variables that were being
4364 formatted using %ld, because on OpenBSD (and perhaps others), time_t is int
4365 rather than long int.
4367 25. Installed the latest Cygwin configuration files from the Cygwin maintainer.
4369 26. Added the never_mail option to autoreply.
4375 1. A reorganization of the code in order to implement 4.40/8 caused a daemon
4376 crash if the getsockname() call failed; this can happen if a connection is
4377 closed very soon after it is established. The problem was simply in the
4378 order in which certain operations were done, causing Exim to try to write
4379 to the SMTP stream before it had set up the file descriptor. The bug has
4380 been fixed by making things happen in the correct order.
4386 1. If "drop" was used in a DATA ACL, the SMTP output buffer was not flushed
4387 before the connection was closed, thus losing the rejection response.
4389 2. Commented out the definition of SOCKLEN_T in os.h-SunOS5. It is needed for
4390 some early Solaris releases, but causes trouble in current releases where
4391 socklen_t is defined.
4393 3. When std{in,out,err} are closed, re-open them to /dev/null so that they
4396 4. Minor refactoring of os.c-Linux to avoid compiler warning when IPv6 is not
4399 5. Refactoring in expand.c to improve memory usage. Pre-allocate a block so
4400 that releasing the top of it at the end releases what was used for sub-
4401 expansions (unless the block got too big). However, discard this block if
4402 the first thing is a variable or header, so that we can use its block when
4403 it is dynamic (useful for very large $message_headers, for example).
4405 6. Lookups now cache *every* query, not just the most recent. A new, separate
4406 store pool is used for this. It can be recovered when all lookup caches are
4407 flushed. Lookups now release memory at the end of their result strings.
4408 This has involved some general refactoring of the lookup sources.
4410 7. Some code has been added to the store_xxx() functions to reduce the amount
4411 of flapping under certain conditions.
4413 8. log_incoming_interface used to affect only the <= reception log lines. Now
4414 it causes the local interface and port to be added to several more SMTP log
4415 lines, for example "SMTP connection from", and rejection lines.
4417 9. The Sieve author supplied some patches for the doc/README.SIEVE file.
4419 10. Added a conditional definition of _BSD_SOCKLEN_T to os.h-Darwin.
4421 11. If $host_data was set by virtue of a hosts lookup in an ACL, its value
4422 could be overwritten at the end of the current message (or the start of a
4423 new message if it was set in a HELO ACL). The value is now preserved for
4424 the duration of the SMTP connection.
4426 12. If a transport had a headers_rewrite setting, and a matching header line
4427 contained an unqualified address, that address was qualified, even if it
4428 did not match any rewriting rules. The underlying bug was that the values
4429 of the flags that permit the existence of unqualified sender and recipient
4430 addresses in header lines (set by {sender,recipient}_unqualified_hosts for
4431 non-local messages, and by -bnq for local messages) were not being
4432 preserved with the message after it was received.
4434 13. When Exim was logging an SMTP synchronization error, it could sometimes log
4435 "next input=" as part of the text comprising the host identity instead of
4436 the correct text. The code was using the same buffer for two different
4437 strings. However, depending on which order the printing function evaluated
4438 its arguments, the bug did not always show up. Under Linux, for example, my
4439 test suite worked just fine.
4441 14. Exigrep contained a use of Perl's "our" scoping after change 4.31/70. This
4442 doesn't work with some older versions of Perl. It has been changed to "my",
4443 which in any case is probably the better facility to use.
4445 15. A really picky compiler found some instances of statements for creating
4446 error messages that either had too many or two few arguments for the format
4449 16. The size of the buffer for calls to the DNS resolver has been increased
4450 from 1024 to 2048. A larger buffer is needed when performing PTR lookups
4451 for addresses that have a lot of PTR records. This alleviates a problem; it
4452 does not fully solve it.
4454 17. A dnsdb lookup for PTR records that receives more data than will fit in the
4455 buffer now truncates the list and logs the incident, which is the same
4456 action as happens when Exim is looking up a host name and its aliases.
4457 Previously in this situation something unpredictable would happen;
4458 sometimes it was "internal error: store_reset failed".
4460 18. If a server dropped the connection unexpectedly when an Exim client was
4461 using GnuTLS and trying to read a response, the client delivery process
4462 crashed while trying to generate an error log message.
4464 19. If a "warn" verb in an ACL added multiple headers to a message in a single
4465 string, for example:
4467 warn message = H1: something\nH2: something
4469 the text was added as a single header line from Exim's point of view
4470 though it ended up OK in the delivered message. However, searching for the
4471 second and subsequent header lines using $h_h2: did not work. This has been
4472 fixed. Similarly, if a system filter added multiple headers in this way,
4473 the routers could not see them.
4475 20. Expanded the error message when iplsearch is called with an invalid key to
4476 suggest using net-iplsearch in a host list.
4478 21. When running tests using -bh, any delays imposed by "delay" modifiers in
4479 ACLs are no longer actually imposed (and a message to that effect is
4482 22. If a "gecos" field in a passwd entry contained escaped characters, in
4483 particular, if it contained a \" sequence, Exim got it wrong when building
4484 a From: or a Sender: header from that name. A second bug also caused
4485 incorrect handling when an unquoted " was present following a character
4486 that needed quoting.
4488 23. "{crypt}" as a password encryption mechanism for a "crypteq" expansion item
4489 was not being matched caselessly.
4491 24. Arranged for all hyphens in the exim.8 source to be escaped with
4494 25. Change 16 of 4.32, which reversed 71 or 4.31 didn't quite do the job
4495 properly. Recipient callout cache records were still being keyed to include
4496 the sender, even when use_sender was set false. This led to far more
4497 callouts that were necessary. The sender is no longer included in the key
4498 when use_sender is false.
4500 26. Added "control = submission" modifier to ACLs.
4502 27. Added the ${base62d: operator to decode base 62 numbers.
4504 28. dnsdb lookups can now access SRV records.
4506 29. CONFIGURE_OWNER can be set at build time to define an alternative owner for
4507 the configuration file.
4509 30. The debug message "delivering xxxxxx-xxxxxx-xx" is now output in verbose
4510 (-v) mode. This makes the output for a verbose queue run more intelligible.
4512 31. Added a use_postmaster feature to recipient callouts.
4514 32. Added the $body_zerocount variable, containing the number of binary zero
4515 bytes in the message body.
4517 33. The time of last modification of the "new" subdirectory is now used as the
4518 "mailbox time last read" when there is a quota error for a maildir
4521 34. Added string comparison operators lt, lti, le, lei, gt, gti, ge, gei.
4523 35. Added +ignore_unknown as a special item in host lists.
4525 36. Code for decoding IPv6 addresses in host lists is now included, even if
4526 IPv6 support is not being compiled. This fixes a bug in which an IPv6
4527 address was recognized as an IP address, but was then not correctly decoded
4528 into binary, causing unexpected and incorrect effects when compared with
4535 1. Very minor rewording of debugging text in manualroute to say "list of
4536 hosts" instead of "hostlist".
4538 2. If verify=header_syntax was set, and a header line with an unqualified
4539 address (no domain) and a large number of spaces between the end of the
4540 name and the colon was received, the reception process suffered a buffer
4541 overflow, and (when I tested it) crashed. This was caused by some obsolete
4542 code that should have been removed. The fix is to remove it!
4544 3. When running in the test harness, delay a bit after writing a bounce
4545 message to get a bit more predictability in the log output.
4547 4. Added a call to search_tidyup() just before forking a reception process. In
4548 theory, someone could use a lookup in the expansion of smtp_accept_max_
4549 per_host which, without the tidyup, could leave open a database connection.
4551 5. Added the variables $recipient_data and $sender_data which get set from a
4552 lookup success in an ACL "recipients" or "senders" condition, or a router
4553 "senders" option, similar to $domain_data and $local_part_data.
4555 6. Moved the writing of debug_print from before to after the "senders" test
4558 7. Change 4.31/66 (moving the time when the Received: is generated) caused
4559 problems for message scanning, either using a data ACL, or using
4560 local_scan() because the Received: header was not generated till after they
4561 were called (in order to set the time as the time of reception completion).
4562 I have revised the way this works. The header is now generated after the
4563 body is received, but before the ACL or local_scan() are called. After they
4564 are run, the timestamp in the header is updated.
4570 1. Change 4.24/6 introduced a bug because the SIGALRM handler was disabled
4571 before starting a queue runner without re-exec. This happened only when
4572 deliver_drop_privilege was set or when the Exim user was set to root. The
4573 effect of the bug was that timeouts during subsequent deliveries caused
4574 crashes instead of being properly handled. The handler is now left at its
4575 default (and expected) setting.
4577 2. The other case in which a daemon avoids a re-exec is to deliver an incoming
4578 message, again when deliver_drop_privilege is set or Exim is run as root.
4579 The bug described in (1) was not present in this case, but the tidying up
4580 of the other signals was missing. I have made the two cases consistent.
4582 3. The ignore_target_hosts setting on a manualroute router was being ignored
4583 for hosts that were looked up using the /MX notation.
4585 4. Added /ignore=<ip list> feature to @mx_any, @mx_primary, and @mx_secondary
4588 5. Change 4.31/55 was buggy, and broke when there was a rewriting rule that
4589 operated on the sender address. After changing the $sender_address to <>
4590 for the sender address verify, Exim was re-instated it as the original
4591 (before rewriting) address, but remembering that it had rewritten it, so it
4592 wasn't rewriting it again. This bug also had the effect of breaking the
4593 sender address verification caching when the sender address was rewritten.
4595 6. The ignore_target_hosts option was being ignored by the ipliteral router.
4596 This has been changed so that if the ip literal address matches
4597 ignore_target_hosts, the router declines.
4599 7. Added expansion conditions match_domain, match_address, and match_local_
4600 part (NOT match_host).
4602 8. The placeholder for the Received: header didn't have a length field set.
4604 9. Added code to Exim itself and to exim_lock to test for a specific race
4605 condition that could lead to file corruption when using MBX delivery. The
4606 issue is with the lockfile that is created in /tmp. If this file is removed
4607 after a process has opened it but before that process has acquired a lock,
4608 there is the potential for a second process to recreate the file and also
4609 acquire a lock. This could lead to two Exim processes writing to the file
4610 at the same time. The added code performs the same test as UW imapd; it
4611 checks after acquiring the lock that its file descriptor still refers to
4612 the same named file.
4614 10. The buffer for building added header lines was of fixed size, 8192 bytes.
4615 It is now parameterized by HEADER_ADD_BUFFER_SIZE and this can be adjusted
4618 11. Added the smtp_active_hostname option. If used, this will typically be made
4619 to depend on the incoming interface address. Because $interface_address is
4620 not set up until the daemon has forked a reception process, error responses
4621 that can happen earlier (such as "too many connections") no longer contain
4624 12. If an expansion in a condition on a "warn" statement fails because a lookup
4625 defers, the "warn" statement is abandoned, and the next ACL statement is
4626 processed. Previously this caused the whole ACL to be aborted.
4628 13. Added the iplsearch lookup type.
4630 14. Added ident_timeout as a log selector.
4632 15. Added tls_certificate_verified as a log selector.
4634 16. Added a global option tls_require_ciphers (compare the smtp transport
4635 option of the same name). This controls incoming TLS connections.
4637 17. I finally figured out how to make tls_require_ciphers do a similar thing
4638 in GNUtls to what it does in OpenSSL, that is, set up an appropriate list
4639 before starting the TLS session.
4641 18. Tabs are now shown as \t in -bP output.
4643 19. If the log selector return_path_on_delivery was set, Exim crashed when
4644 bouncing a message because it had too many Received: header lines.
4646 20. If two routers both had headers_remove settings, and the first one included
4647 a superfluous trailing colon, the final name in the first list and the
4648 first name in the second list were incorrectly joined into one item (with a
4649 colon in the middle).
4655 1. Added -C and -D options to the exinext utility, mainly to make it easier
4656 to include in the automated testing, but these could be helpful when
4657 multiple configurations are in use.
4659 2. The exinext utility was not formatting the output nicely when there was
4660 an alternate port involved in the retry record key, nor when there was a
4661 message id as well (for retries that were specific to a specific message
4662 and a specific host). It was also confused by IPv6 addresses, because of
4663 the additional colons they contain. I have fixed the IPv4 problem, and
4664 patched it up to do a reasonable job for IPv6.
4666 3. When there is an error after a MAIL, RCPT, or DATA SMTP command during
4667 delivery, the log line now contains "pipelined" if PIPELINING was used.
4669 4. An SMTP transport process used to panic and die if the bind() call to set
4670 an explicit outgoing interface failed. This has been changed; it is now
4671 treated in the same way as a connect() failure.
4673 5. A reference to $sender_host_name in the part of a conditional expansion
4674 that was being skipped was still causing a DNS lookup. This no longer
4677 6. The def: expansion condition was not recognizing references to header lines
4678 that used bh_ and bheader_.
4680 7. Added the _cache feature to named lists.
4682 8. The code for checking quota_filecount in the appendfile transport was
4683 allowing one more file than it should have been.
4685 9. For compatibility with Sendmail, the command line option
4693 and sets the incoming protocol and host name (for trusted callers). The
4694 host name and its colon can be omitted when only the protocol is to be set.
4695 Note the Exim already has two private options, -pd and -ps, that refer to
4696 embedded Perl. It is therefore impossible to set a protocol value of "d" or
4697 "s", but I don't think that's a major issue.
4699 10. A number of refactoring changes to the code, none of which should affect
4702 (a) The number of logging options was getting close to filling up the
4703 32-bit word that was used as a bit map. I have split them into two classes:
4704 those that are passed in the argument to log_write(), and those that are
4705 only ever tested independently outside of that function. These are now in
4706 separate 32-bit words, so there is plenty of room for expansion again.
4707 There is no change in the user interface or the logging behaviour.
4709 (b) When building, for example, log lines, the code previously used a
4710 macro that called string_cat() twice, in order to add two strings. This is
4711 not really sufficiently general. Furthermore, there was one instance where
4712 it was actually wrong because one of the argument was used twice, and in
4713 one call a function was used. (As it happened, calling the function twice
4714 did not affect the overall behaviour.) The macro has been replaced by a
4715 function that can join an arbitrary number of extra strings onto a growing
4718 (c) The code for expansion conditions now uses a table and a binary chop
4719 instead of a serial search (which was left over from when there were very
4720 few conditions). Also, it now recognizes conditions like "pam" even when
4721 the relevant support is not compiled in: a suitably worded error message is
4722 given if an attempt is made to use such a condition.
4724 11. Added ${time_interval:xxxxx}.
4726 12. A bug was causing one of the ddress fields not to be passed back correctly
4727 from remote delivery subprocesses. The field in question was not being
4728 subsequently used, so this caused to problems in practice.
4730 13. Added new log selectors queue_time and deliver_time.
4732 14. Might have fixed a bug in maildirsizefile handling that threw up
4733 "unexpected character" debug warnings, and recalculated the data
4734 unnecessarily. In any case, I expanded the warning message to give more
4737 15. Added the message "Restricted characters in address" to the statements in
4738 the default ACL that block characters like @ and % in local parts.
4740 16. Change 71 for release 4.31 proved to be much less benign that I imagined.
4741 Three changes have been made:
4743 (a) There was a serious bug; a negative response to MAIL caused the whole
4744 recipient domain to be cached as invalid, thereby blocking all messages
4745 to all local parts at the same domain, from all senders. This bug has
4746 been fixed. The domain is no longer cached after a negative response to
4747 MAIL if the sender used is not empty.
4749 (b) The default behaviour of using MAIL FROM:<> for recipient callouts has
4752 (c) A new callout option, "use_sender" has been added for people who want
4753 the modified behaviour.
4759 1. Removed "EXTRALIBS=-lwrap" from OS/Makefile-Unixware7 on the advice of
4762 2. Removed "LIBS = -lresolv" from OS/Makefile-Darwin as it is not needed, and
4763 indeed breaks things for older releases.
4765 3. Added additional logging to the case where there is a problem reading data
4766 from a filter that is running in a subprocess using a pipe, in order to
4767 try to track down a specific problem.
4769 4. Testing facility fudge: when running in the test harness and attempting
4770 to connect to 10.x.x.x (expecting a connection timeout) I'm now sometimes
4771 getting "No route to host". Convert this to a timeout.
4773 5. Define ICONV_ARG2_TYPE as "char **" for Unixware7 to avoid compiler
4776 6. Some OS don't have socklen_t but use size_t instead. This affects the
4777 fifth argument of getsockopt() amongst other things. This is now
4778 configurable by a macro called SOCKLEN_T which defaults to socklen_t, but
4779 can be set for individual OS. I have set it for SunOS5, OSF1, and
4780 Unixware7. Current versions of SunOS5 (aka Solaris) do have socklen_t, but
4781 some earlier ones do not.
4783 7. Change 4.30/15 was not doing the test caselessly.
4785 8. The standard form for an IPv6 address literal was being rejected by address
4786 parsing in, for example, MAIL and RCPT commands. An example of this kind of
4787 address is [IPv6:2002:c1ed:8229:10:202:2dff:fe07:a42a]. Exim now accepts
4788 this, as well as the form without the "IPv6" on the front (but only when
4789 address literals are enabled, of course).
4791 9. Added some casts to avoid compiler warnings in OS/os.c-Linux.
4793 10. Exim crashed if a message with an empty sender address specified by -f
4794 encountered a router with an errors_to setting. This could be provoked only
4795 by a command such as
4799 where an empty string was supplied; "<>" did not hit this bug.
4801 11. Installed PCRE release 4.5.
4803 12. If EHLO/HELO was rejected by an ACL, the value of $sender_helo_name
4804 remained set. It is now erased.
4806 13. exiqgrep wasn't working on MacOS X because it didn't correctly compute
4807 times from message ids (which are base 36 rather than the normal 62).
4809 14. "Expected" SMTP protocol errors that can arise when PIPELINING is in use
4810 were being counted as actual protocol errors, and logged if the log
4811 selector +smtp_protocol_error was set. One cannot be perfect in this test,
4812 but now, if PIPELINING has been advertised, RCPT following a rejected MAIL,
4813 and DATA following a set of rejected RCPTs do not count as protocol errors.
4814 In other words, Exim assumes they were pipelined, though this may not
4815 actually be the case. Of course, in all cases the client gets an
4816 appropriate error code.
4818 15. If a lookup fails in an ACL condition, a message about the failure may
4819 be available; it is used if testing the ACL cannot continue, because most
4820 such messages specify what the cause of the deferral is. However, some
4821 messages (e.g. "MYSQL: no data found") do not cause a defer. There was bug
4822 that caused an old message to be retained and used if a later statement
4823 caused a defer, replacing the real cause of the deferral.
4825 16. If an IP address had so many PTR records that the DNS lookup buffer
4826 was not large enough to hold them, Exim could crash while trying to process
4827 the truncated data. It now detects and logs this case.
4829 17. Further to 4.21/58, another change has been made: if (and only if) the
4830 first line of a message (the first header line) ends with CRLF, a bare LF
4831 in a subsequent header line has a space inserted after it, so as not to
4832 terminate the header.
4834 18. Refactoring: tidied an ugly bit of code in appendfile that copied data
4835 unnecessarily, used atoi() instead of strtol(), and didn't check the
4836 termination when getting file sizes from file names by regex.
4838 19. Completely re-implemented the support for maildirsize files, in the light
4839 of a number of problems with the previous contributed implementation
4840 (4.30/29). In particular:
4842 . If the quota is zero, the maildirsize file is maintained, but no quota is
4845 . If the maildir directory does not exist, it is created before any attempt
4846 to write a maildirsize file.
4848 . The quota value in the file is just a cache; if the quota is changed in
4849 the transport, the new value overrides.
4851 . A regular expression is available for excluding directories from the
4854 20. The autoreply transport checks the characters in options that define the
4855 message's headers; it allows continued headers, but it was checking with
4856 isspace() after an embedded newline instead of explicitly looking for a
4859 21. If all the "regular" hosts to which an address was routed had passed their
4860 expiry times, and had not reached their retry times, the address was
4861 bounced, even if fallback hosts were defined. Now Exim should go on to try
4864 22. Increased buffer sizes in the callout code from 1024 to 4096 to match the
4865 equivalent code in the SMTP transport. Some hosts send humungous responses
4866 to HELO/EHLO, more than 1024 it seems.
4868 23. Refactoring: code in filter.c used (void *) for "any old type" but this
4869 gives compiler warnings in some environments. I've now done it "properly",
4872 24. The replacement for inet_ntoa() that is used with gcc on IRIX systems
4873 (because of problems with the built-in one) was declared to return uschar *
4874 instead of char *, causing compiler failure.
4876 25. Fixed a file descriptor leak when processing alias/forward files.
4878 26. Fixed a minor format string issue in dbfn.c.
4880 27. Typo in exim.c: ("dmbnz" for "dbmnz").
4882 28. If a filter file refered to $h_xxx or $message_headers, and the headers
4883 contained RFC 2047 "words", Exim's memory could, under certain conditions,
4886 29. When a sender address is verified, it is cached, to save repeating the test
4887 when there is more than one recipient in a message. However, when the
4888 verification involves a callout, it is possible for different callout
4889 options to be set for different recipients. It is too complicated to keep
4890 track of this in the cache, so now Exim always runs a verification when a
4891 callout is required, relying on the callout cache for the optimization.
4892 The overhead is duplication of the address routing, but this should not be
4895 30. Fixed a bug in callout caching. If a RCPT command caused the sender address
4896 to be verified with callout=postmaster, and the main callout worked but the
4897 postmaster check failed, the verification correctly failed. However, if a
4898 subsequent RCPT command asked for sender verification *without* the
4899 postmaster check, incorrect caching caused this verification also to fail,
4902 31. Exim caches DNS lookup failures so as to avoid multiple timeouts; however,
4903 it was not caching the DNS options (qualify_single, search_parents) that
4904 were used when the lookup failed. A subsequent lookup with different
4905 options therefore always gave the same answer, though there were cases
4906 where it should not have. (Example: a "domains = !$mx_any" option on a
4907 dnslookup router: the "domains" option is always processed without any
4908 widening, but the router might have qualify_single set.) Now Exim uses the
4909 cached value only when the same options are set.
4911 32. Added John Jetmore's "exipick" utility to the distribution.
4913 33. GnuTLS: When an attempt to start a TLS session fails for any reason other
4914 than a timeout (e.g. a certificate is required, and is not provided), an
4915 Exim server now closes the connection immediately. Previously it waited for
4916 the client to close - but if the client is SSL, it seems that they each
4917 wait for each other, leading to a delay before one of them times out.
4919 34: GnuTLS: Updated the code to use the new GnuTLS 1.0.0 API. I have not
4920 maintained 0.8.x compatibility because I don't think many are using it, and
4921 it is clearly obsolete.
4923 35. Added TLS support for CRLs: a tls_crl global option and one for the smtp
4926 36. OpenSSL: $tls_certificate_verified was being set to 1 even if the
4927 client certificate was expired. A simple patch fixes this, though I don't
4928 understand the full logic of why the verify callback is called multiple
4931 37. OpenSSL: a patch from Robert Roselius: "Enable client-bug workaround.
4932 Versions of OpenSSL as of 0.9.6d include a 'CBC countermeasure' feature,
4933 which causes problems with some clients (such as the Certicom SSL Plus
4934 library used by Eudora). This option, SSL_OP_DONT_INSERT_EMPTY_FRAGMENTS,
4935 disables the coutermeasure allowing Eudora to connect."
4937 38. Exim was not checking that a write() to a log file succeeded. This could
4938 lead to Bad Things if a log got too big, in particular if it hit a file
4939 size limit. Exim now panics and dies if it cannot write to a log file, just
4940 as it does if it cannot open a log file.
4942 39. Modified OS/Makefile-Linux so that it now contains
4944 CFLAGS=-O -D_FILE_OFFSET_BITS=64 -D_LARGEFILE_SOURCE
4946 The two -D definitions ensure that Exim is compiled with large file
4947 support, which makes it possible to handle log files that are bigger than
4950 40. Fixed a subtle caching bug: if (in an ACL or a set of routers, for
4951 instance) a domain was checked against a named list that involved a lookup,
4952 causing $domain_data to be set, then another domain was checked against the
4953 same list, then the first domain was re-checked, the value of $domain_data
4954 after the final check could be wrong. In particular, if the second check
4955 failed, it could be set empty. This bug probably also applied to
4958 41. The strip_trailing_dot option was not being applied to the address given
4959 with the -f command-line option.
4961 42. The code for reading a message's header from the spool was incrementing
4962 $received_count, but never initializing it. This meant that the value was
4963 incorrect (doubled) while delivering a message in the same process in which
4964 it was received. In the most common configuration of Exim, this never
4965 happens - a fresh exec is done - but it can happen when
4966 deliver_drop_privilege is set.
4968 43. When Exim logs an SMTP synchronization error - client data sent too soon -
4969 it now includes up to 150 characters of the unexpected data in the log
4972 44. The exim_dbmbuild utility uses fixed size buffers for reading input lines
4973 and building data strings. The size of both of these buffers was 10 000
4974 bytes - far larger than anybody would *ever* want, thought I. Needless to
4975 say, somebody hit the limit. I have increased the maximum line length to
4976 20 000 and the maximum data length of concatenated lines to 100 000. I have
4977 also fixed two bugs, because there was no checking on these buffers. Tsk,
4978 tsk. Now exim_dbmbuild gives a message and exits with an error code if a
4979 buffer is too small.
4981 45. The exim_dbmbuild utility did not support quoted keys, as Exim does in
4982 lsearch lookups. Now it does.
4984 46. When parsing a route_list item in a manualroute router, a fixed-length
4985 buffer was used for the list of hosts. I made this 1024 bytes long,
4986 thinking that nobody would ever have a list of hosts that long. Wrong.
4987 Somebody had a whole pile of complicated expansion conditions, and the
4988 string was silently truncated, leading to an expansion error. It turns out
4989 that it is easier to change to an unlimited length (owing to other changes
4990 that have happened since this code was originally written) than to build
4991 structure for giving a limitation error. The length of the item that
4992 expands into the list of hosts is now unlimited.
4994 47. The lsearch lookup could not handle data where the length of text line was
4995 more than 4095 characters. Such lines were truncated, leading to shortened
4996 data being returned. It should now handle lines of any length.
4998 48. Minor wording revision: "cannot test xxx in yyy ACL" becomes "cannot test
4999 xxx condition in yyy ACL" (e.g. "cannot test domains condition in DATA
5002 49. Cosmetic tidy to scripts like exicyclog that are generated by globally
5003 replacing strings such as BIN_DIRECTORY in a source file: the replacement
5004 no longer happens in comment lines. A list of replacements is now placed
5005 at the head of all of the source files, except those whose only change is
5006 to replace PERL_COMMAND in the very first #! line.
5008 50. Replaced the slow insertion sort in queue.c, for sorting the list of
5009 messages on the queue, with a bottom-up merge sort, using code contributed
5010 by Michael Haardt. This should make operations like -bp somewhat faster on
5011 large queues. It won't affect queue runners, except when queue_run_in_order
5014 51. Installed eximstats 1.31 in the distribution.
5016 52. Added support for SRV lookups to the dnslookup router.
5018 53. If an ACL referred to $message_body or $message_body_end, the value was not
5019 reset for any messages that followed in the same SMTP session.
5021 54. The store-handling optimization for building very long strings was not
5022 differentiating between the different store pools. I don't think this
5023 actually made any difference in practice, but I've tidied it.
5025 55. While running the routers to verify a sender address, $sender_address
5026 was still set to the sender address. This is wrong, because when routing to
5027 send a bounce to the sender, it would be empty. Therefore, I have changed
5028 it so that, while verifying a sender address, $sender_address is set to <>.
5029 (There is no change to what happens when verifying a recipient address.)
5031 56. After finding MX (or SRV) records, Exim was doing a DNS lookup for the
5032 target A or AAAA records (if not already returned) without resetting the
5033 qualify_single or search_parents options of the DNS resolver. These are
5034 inappropriate in this case because the targets of MX and SRV records must
5035 be FQDNs. A broken DNS record could cause trouble if it happened to have a
5036 target that, when qualified, matched something in the local domain. These
5037 two options are now turned off when doing these lookups.
5039 57. It seems that at least some releases of Reiserfs (which does not have the
5040 concept of a fixed number of inodes) returns zero and not -1 for the
5041 number of available inodes. This interacted badly with check_spool_inodes,
5042 which assumed that -1 was the "no such thing" setting. What I have done is
5043 to check that the total number of inodes is greater than zero before doing
5044 the test of how many are available.
5046 58. When a "warn" ACL statement has a log_message modifier, the message is
5047 remembered, and not repeated. This is to avoid a lot of repetition when a
5048 message has many recipients that cause the same warning to be written.
5049 Howewer, Exim was preserving the list of already written lines for an
5050 entire SMTP session, which doesn't seem right. The memory is now reset if a
5051 new message is started.
5053 59. The "rewrite" debugging flag was not showing the result of rewriting in the
5054 debugging output unless log_rewrite was also set.
5056 60. Avoid a compiler warning on 64-bit systems in dsearch.c by avoiding the use
5057 of (int)(handle) when we know that handle contains (void *)(-1).
5059 61. The Exim daemon panic-logs an error return when it closes the incoming
5060 connection. However "connection reset by peer" seems to be common, and
5061 isn't really an error worthy of noting specially, so that particular error
5064 62. When Exim is trying to find all the local interfaces, it used to panic and
5065 die if the ioctl to get the interface flags failed. However, it seems that
5066 on at least one OS (Solaris 9) it is possible to have an interface that is
5067 included in the list of interfaces, but for which you get a failure error
5068 for this call. This happens when the interface is not "plumbed" into a
5069 protocol (i.e. neither IPv4 nor IPv6). I've changed the code so that a
5070 failure of the "get flags" call assumes that the interface is down.
5072 63. Added a ${eval10: operator, which assumes all numbers are decimal. This
5073 makes life easier for people who are doing arithmetic on fields extracted
5074 from dates, where you often get leading zeros that should not be
5075 interpreted as octal.
5077 64. Added qualify_domain to the redirect router, to override the global
5080 65. If a pathologically long header line contained very many addresses (the
5081 report of this problem mentioned 10 000) and each of them was rewritten,
5082 Exim could use up a very large amount of memory. (It kept on making new
5083 copies of the header line as it rewrote, and never released the old ones.)
5084 At the expense of a bit more processing, the header rewriting function has
5085 been changed so that it no longer eats memory in this way.
5087 66. The generation of the Received: header has been moved from the time that a
5088 message starts to be received, to the time that it finishes. The timestamp
5089 in the Received: header should now be very close to that of the <= log
5090 line. There are two side-effects of this change:
5092 (a) If a message is rejected by a DATA or non-SMTP ACL or local_scan(), the
5093 logged header lines no longer include the local Received: line, because
5094 it has not yet been created. The same applies to a copy of the message
5095 that is returned to a non-SMTP sender when a message is rejected.
5097 (b) When a filter file is tested using -bf, no additional Received: header
5098 is added to the test message. After some thought, I decided that this
5101 This change does not affect the value of $received_for. It is still set
5102 after address rewriting, but before local_scan() is called.
5104 67. Installed the latest Cygwin-specific files from the Cygwin maintainer.
5106 68. GnuTLS: If an empty file is specified for tls_verify_certificates, GnuTLS
5107 gave an unhelpful panic error message, and a defer error. I have managed to
5108 change this behaviour so that it now rejects any supplied certificate,
5109 which seems right, as the list of acceptable certificates is empty.
5111 69. OpenSSL: If an empty file is specified for tls_verify_certificates, OpenSSL
5112 gave an unhelpful defer error. I have not managed to make this reject any
5113 supplied certificates, but the error message it gives is "no certificate
5114 supplied", which is not helpful.
5116 70. exigrep's output now also includes lines that are not associated with any
5117 message, but which match the given pattern. Implemented by a patch from
5118 Martin Sluka, which also tidied up the Perl a bit.
5120 71. Recipient callout verification, like sender verification, was using <> in
5121 the MAIL FROM command. This isn't really the right thing, since the actual
5122 sender may affect whether the remote host accepts the recipient or not. I
5123 have changed it to use the actual sender in the callout; this means that
5124 the cache record is now keyed on a recipient/sender pair, not just the
5125 recipient address. There doesn't seem to be a real danger of callout loops,
5126 since a callout by the remote host to check the sender would use <>.
5127 [SEE ABOVE: changed after hitting problems.]
5129 72. Exim treats illegal SMTP error codes that do not begin with 4 or 5 as
5130 temporary errors. However, in the case of such a code being given after
5131 the end of a data transmission (i.e. after ".") Exim was failing to write
5132 a retry record for the message. (Yes, there was some broken host that was
5133 actually sending 8xx at this point.)
5135 73. An unknown lookup type in a host list could cause Exim to panic-die when
5136 the list was checked. (An example that provoked this was putting <; in the
5137 middle of a list instead of at the start.) If this happened during a DATA
5138 ACL check, a -D file could be left lying around. This kind of configuration
5139 error no longer causes Exim to die; instead it causes a defer errror. The
5140 incident is still logged to the main and panic logs.
5142 74. Buglet left over from Exim 3 conversion. The message "too many messages
5143 in one connection" was written to the rejectlog but not the mainlog, except
5144 when address rewriting (yes!) was being logged.
5146 75. Added write_rejectlog option.
5148 76. When a system filter was run not as root (that is, when system_filter_user
5149 was set), the values of the $n variables were not being returned to the
5150 main process; thus, they were not subsequently available in the $sn
5153 77. Added +return_path_on_delivery log selector.
5155 78. A connection timeout was being treated differently from recipients deferred
5156 when testing hosts_max_try with a message that was older than the host's
5157 retry timeout. (The host should not be counted, thus allowing all hosts to
5158 be tried at least once before bouncing.) This may have been the cause of an
5159 occasionally reported bug whereby a message would remain on the queue
5160 longer than the retry timeout, but would be bounced if a delivery was
5161 forced. I say "may" because I never totally pinned down the problem;
5162 setting up timeout/retry tests is difficult. See also the next item.
5164 79. The ultimate address timeout was not being applied to errors that involved
5165 a combination of host plus message (for example, a timeout on a MAIL
5166 command). When an address resolved to a number of possible hosts, and they
5167 were not all tried for each delivery (e.g. because of hosts_max_try), a
5168 message could remain on the queue longer than the retry timeout.
5170 80. Sieve bug: "stop" inside "elsif" was broken. Applied a patch from Michael
5173 81. Fixed an obscure SMTP outgoing bug which required at least the following
5174 conditions: (a) there was another message waiting for the same server;
5175 (b) the server returned 5xx to all RCPT commands in the first message so
5176 that the message was not completed; (c) the server dropped the connection
5177 or gave a negative response to the RSET that Exim sends to abort the
5178 transaction. The observed case was a dropped connection after DATA that had
5179 been sent in pipelining mode. That is, the server had advertised PIPELINING
5180 but was not implementing it correctly. The effect of the bug was incorrect
5181 behaviour, such as trying another host, and this could lead to a crash.
5187 1. The 3rd arguments to getsockname(), getpeername(), and accept() in exim.c
5188 and daemon.c were passed as pointers to ints; they should have been
5189 pointers to socklen_t variables (which are typically unsigned ints).
5191 2. Some signed/unsigned type warnings in the os.c file for Linux have been
5194 3. Fixed a really odd bug that affected only the testing scheme; patching a
5195 certain fixed string in the binary changed the value of another string that
5196 happened to be identical to the end of the original first string.
5198 4. When gethostbyname() (or equivalent) is passed an IP address as a "host
5199 name", it returns that address as the IP address. On some operating
5200 systems (e.g. Solaris), it also passes back the IP address string as the
5201 "host name". However, on others (e.g. Linux), it passes back an empty
5202 string. Exim wasn't checking for this, and was changing the host name to an
5203 empty string, assuming it had been canonicized.
5205 5. Although rare, it is permitted to have more than one PTR record for a given
5206 IP address. I thought that gethostbyaddr() or getipnodebyaddr() always gave
5207 all the names associated with an address, because they do in Solaris.
5208 However, it seems that they do not in Linux for data that comes from the
5209 DNS. If an address in /etc/hosts has multiple names, they _are_ all given.
5210 I found this out when I moved to a new Linux workstation and tried to run
5211 the Exim test suite.
5213 To get round this problem I have changed the code so that it now does its
5214 own call to the DNS to look up PTR records when searching for a host name.
5215 If nothing can be found in the DNS, it tries gethostbyaddr(), so that
5216 addresses that are only in /etc/hosts are still found.
5218 This behaviour is, however, controlled by an option called host_lookup_
5219 order, which defaults to "bydns:byaddr". If people want to use the other
5220 order, or indeed, just use one or the other means of lookup, they can
5221 specify it in this variable.
5223 6. If a PTR record yields an empty name, Exim treats it as non-existent. In
5224 some operating systems, this comes back from gethostbyaddr() as an empty
5225 string, and this is what Exim used to test for. However, it seems that in
5226 other systems, "." is yielded. Exim now tests for this case too.
5228 7. The values of check_spool_space and check_log_space are now held internally
5229 as a number of kilobytes instead of an absolute number of bytes. If a
5230 numbers is specified without 'K' or 'M', it is rounded up to the nearest
5231 kilobyte. This means that much larger values can be stored.
5233 8. Exim monitor: an attempt to get the action menu when not actually pointing
5234 at a message produces an empty menu entitled "No message selected". This
5235 works on Solaris (OpenWindows). However, XFree86 does not like a menu with
5236 no entries in it ("Shell widget menu has zero width and/or height"). So I
5237 have added a single, blank menu entry in this case.
5239 9. Added ${quote_local_part.
5241 10. MIME decoding is now applied to the contents of Subject: header lines when
5244 11. Now that a reference to $sender_host_address automatically causes a reverse
5245 lookup to occur if necessary (4.13/18), there is no need to arrange for a
5246 host lookup before query-style lookups in lists that might use this
5247 variable. This has therefore been abolished, and the "net-" prefix is no
5248 longer necessary for query-style lookups.
5250 12. The Makefile for SCO_SV contained a setting of LDFLAGS. This appears to
5251 have been a typo for LFLAGS, so it has been changed.
5253 13. The install script calls Exim with "-C /dev/null" in order to find the
5254 version number. If ALT_CONFIG_PREFIX was set, this caused an error message
5255 to be output. Howeve, since Exim outputs its version number before the
5256 error, it didn't break the script. It just looked ugly. I fixed this by
5257 always allowing "-C /dev/null" if the caller is root.
5259 14. Ignore overlarge ACL variable number when reading spool file - insurance
5260 against a later release with more variables having written the file.
5262 15. The standard form for an IPv6 address literal was being rejected by EHLO.
5263 Example: [IPv6:2002:c1ed:8229:10:202:2dff:fe07:a42a]. Exim now accepts
5264 this, as well as the form without the "IPv6" on the front.
5266 16. Added CHOWN_COMMAND=/usr/sbin/chown and LIBS=-lresolv to the
5267 OS/Makefile-Darwin file.
5269 17. Fixed typo in lookups/ldap.c: D_LOOKUP should be D_lookup. This applied
5270 only to LDAP libraries that do not have LDAP_OPT_DEREF.
5272 18. After change 4.21/52, "%ld" was used to format the contents of the $inode
5273 variable. However, some OS use ints for inodes. I've added cast to long int
5274 to get rid of the compiler warning.
5276 19. I had forgotten to lock out "/../" in configuration file names when
5277 ALT_CONFIG_PREFIX was set.
5279 20. Routers used for verification do not need to specify transports. However,
5280 if such a router generated a host list, and callout was configured, Exim
5281 crashed, because it could not find a port number from the (non-existent)
5282 transport. It now assumes port 25 in this circumstance.
5284 21. Added the -t option to exigrep.
5286 22. If LOOKUP_LSEARCH is defined, all three linear search methods (lsearch,
5287 wildlsearch, nwildlsearch) are compiled. LOOKUP_WILDLSEARCH and LOOKUP_
5288 NWILDLSEARCH are now obsolete, but retained for compatibility. If either of
5289 them is set, LOOKUP_LSEARCH is forced.
5291 23. "exim -bV" now outputs a list of lookups that are included in the binary.
5293 24. Added sender and host information to the "rejected by local_scan()" log
5294 line; previously there was no indication of these.
5296 25. Added .include_if_exists.
5298 26. Change 3.952/11 added an explicit directory sync on top of a file sync for
5299 Linux. It turns out that not all file systems support this. Apparently some
5300 versions of NFS do not. (It's rare to put Exim's spool on NFS, but people
5301 do it.) To cope with this, the error EINVAL, which means that sync-ing is
5302 not supported on the file descriptor, is now ignored when Exim is trying to
5303 sync a directory. This applies only to Linux.
5305 27. Added -DBIND_8_COMPAT to the CLFAGS setting for Darwin.
5307 28. In Darwin (MacOS X), the PAM headers are in /usr/include/pam and not in
5308 /usr/include/security. There's now a flag in OS/os.h-Darwin to cope with
5311 29. Added support for maildirsize files from supplied patch (modified a bit).
5313 30. The use of :fail: followed by an empty string could lead Exim to respond to
5314 sender verification failures with (e.g.):
5316 550 Verification failed for <xxx>
5317 550 Sender verify failed
5319 where the first response line was missing the '-' that indicates it is not
5320 the final line of the response.
5322 31. The loop for finding the name of the user that called Exim had a hardwired
5323 limit of 10; it now uses the value of finduser_retries, which is used for
5324 all other user lookups.
5326 32. Added $received_count variable, available in data and not_smtp ACLs, and at
5329 33. Exim was neglecting to zero errno before one call of strtol() when
5330 expanding a string and expecting an integer value. On some systems this
5331 resulted in spurious "integer overflow" errors. Also, it was casting the
5332 result into an int without checking.
5334 34. Testing for a connection timeout using "timeout_connect" in the retry rules
5335 did not work. The code looks as if it has *never* worked, though it appears
5336 to have been documented since at least releast 1.62. I have made it work.
5338 35. The "timeout_DNS" error in retry rules, also documented since at least
5339 1.62, also never worked. As it isn't clear exactly what this means, and
5340 clearly it isn't a major issue, I have abolished the feature by treating it
5341 as "timeout", and writing a warning to the main and panic logs.
5343 36. The display of retry rules for -brt wasn't always showing the error code
5346 37. Added new error conditions to retry rules: timeout_A, timeout_MX,
5347 timeout_connect_A, timeout_connect_MX.
5349 38. Rewriting the envelope sender at SMTP time did not allow it to be rewritten
5350 to the empty sender.
5352 39. The daemon was not analysing the content of -oX till after it had closed
5353 stderr and disconnected from the controlling terminal. This meant that any
5354 syntax errors were only noted on the panic log, and the return code from
5355 the command was 0. By re-arranging the code a little, I've made the
5356 decoding happen first, so such errors now appear on stderr, and the return
5357 code is 1. However, the actual setting up of the sockets still happens in
5358 the disconnected process, so errors there are still only recorded on the
5361 40. A daemon listener on a wildcard IPv6 socket that also accepts IPv4
5362 connections (as happens on some IP stacks) was logged at start up time as
5363 just listening for IPv6. It now logs "IPv6 with IPv4". This differentiates
5364 it from "IPv6 and IPv4", which means that two separate sockets are being
5367 41. The debug output for gethostbyname2() or getipnodebyname() failures now
5368 says whether AF_INET or AF_INET6 was passed as an argument.
5370 42. Exiwhat output was messed up when time zones were included in log
5373 43. Exiwhat now gives more information about the daemon's listening ports,
5374 and whether -tls-on-connect was used.
5376 44. The "port" option of the smtp transport is now expanded.
5378 45. A "message" modifier in a "warn" statement in a non-message ACL was being
5379 silently ignored. Now an error message is written to the main and panic
5382 46. There's a new ACL modifier called "logwrite" which writes to a log file
5383 as soon as it is encountered.
5385 47. Added $local_user_uid and $local_user_gid at routing time.
5387 48. Exim crashed when trying to verify a sender address that was being
5390 49. Exim was recognizing only a space character after ".include". It now also
5391 recognizes a tab character.
5393 50. Fixed several bugs in the Perl script that creates the exim.8 man page by
5394 extracting the relevant information from the specification. The man page no
5395 longer contains scrambled data for the -d option, and I've added a section
5396 at the front about calling Exim under different names.
5398 51. Added "extra_headers" argument to the "mail" command in filter files.
5400 52. Redirecting mail to an unqualified address in a Sieve filter caused Exim to
5403 53. Installed eximstats 1.29.
5405 54. Added transport_filter_timeout as a generic transport option.
5407 55. Exim no longer adds an empty Bcc: header to messages that have no To: or
5408 Cc: header lines. This was required by RFC 822, but it not required by RFC
5411 56. Exim used to add From:, Date:, and Message-Id: header lines to any
5412 incoming messages that did not have them. Now it does so only if the
5413 message originates locally, that is, if there is no associated remote host
5414 address. When Resent- header lines are present, this applies to the Resent-
5415 lines rather than the non-Resent- lines.
5417 57. Drop incoming SMTP connection after too many syntax or protocol errors. The
5418 limit is controlled by smtp_max_synprot_errors, defaulting to 3.
5420 58. Messages for configuration errors now include the name of the main
5421 configuration file - useful now that there may be more than one file in a
5422 list (.included file names were always shown).
5424 59. Change 4.21/82 (run initgroups() when starting the daemon) causes problems
5425 for those rare installations that do not start the daemon as root or run it
5426 setuid root. I've cut out the call to initgroups() if the daemon is not
5429 60. The Exim user and group can now be bound into the binary as text strings
5430 that are looked up at the start of Exim's processing.
5432 61. Applied a small patch for the Interbase code, supplied by Ard Biesheuvel.
5434 62. Added $mailstore_basename variable.
5436 63. Installed patch to sieve.c from Michael Haardt.
5438 64. When Exim failed to open the panic log after failing to open the main log,
5439 the original message it was trying to log was written to stderr and debug
5440 output, but if they were not available (the usual case in production), it
5441 was lost. Now it is written to syslog before the two lines that record the
5442 failures to open the logs.
5444 65. Users' Exim filters run in subprocesses under the user's uid. It is
5445 possible for a "deliver" command or an alias in a "personal" command to
5446 provoke an address rewrite. If logging of address rewriting is configured,
5447 this fails because the process is not running as root or exim. There may be
5448 a better way of dealing with this, but for the moment (because 4.30 needs
5449 to be released), I have disabled address rewrite logging when running a
5450 filter in a non-root, non-exim process.
5456 1. The buildconfig auxiliary program wasn't quoting the value set for
5457 HEADERS_CHARSET. This caused a compilation error complaining that 'ISO' was
5458 not defined. This bug was masked in 4.22 by the effect that was fixed in
5461 2. Some messages that were rejected after a message id was allocated were
5462 shown as "incomplete" by exigrep. It no longer does this for messages that
5463 are rejected by local_scan() or the DATA or non-SMTP ACLs.
5465 3. If a Message-ID: header used a domain literal in the ID, and Exim did not
5466 have allow_domain_literals set, the ID did not get logged in the <= line.
5467 Domain literals are now always recognized in Message-ID: header lines.
5469 4. The first argument for a ${extract expansion item is the key name or field
5470 number. Leading and trailing spaces in this item were not being ignored,
5471 causing some misleading effects.
5473 5. When deliver_drop_privilege was set, single queue runner processes started
5474 manually (i.e. by the command "exim -q") or by the daemon (which uses the
5475 same command in the process it spins off) were not dropping privilege.
5477 6. When the daemon running as "exim" started a queue runner, it always
5478 re-executed Exim in the spun-off process. This is a waste of effort when
5479 deliver_drop_privilege is set. The new process now just calls the
5480 queue-runner function directly.
5486 1. Typo in the src/EDITME file: it referred to HEADERS_DECODE_TO instead of
5489 2. Change 4.21/73 introduced a bug. The pid file path set by -oP was being
5490 ignored. Though the use of -oP was forcing the writing of a pid file, it
5491 was always written to the default place.
5493 3. If the message "no IP address found for host xxxx" is generated during
5494 incoming verification, it is now followed by identification of the incoming
5495 connection (so you can more easily find what provoked it).
5497 4. Bug fix for Sieve filters: "stop" inside a block was not working properly.
5499 5. Added some features to "harden" Exim a bit more against certain attacks:
5501 (a) There is now a build-time option called FIXED_NEVER_USERS that can
5502 be put in Local/Makefile. This is like the never_users runtime option,
5503 but it cannot be overridden. The default setting is "root".
5505 (b) If ALT_CONFIG_PREFIX is defined in Local/Makefile, it specifies a
5506 prefix string with which any file named in a -C command line option
5509 (c) If ALT_CONFIG_ROOT_ONLY is defined in Local/Makefile, root privilege
5510 is retained for -C and -D only if the caller of Exim is root. Without
5511 it, the exim user may also use -C and -D and retain privilege.
5513 (d) If DISABLE_D_OPTION is defined in Local/Makefile, the use of the -D
5514 command line option is disabled.
5516 6. Macro names set by the -D option must start with an upper case letter, just
5517 like macro names defined in the configuration file.
5519 7. Added "dereference=" facility to LDAP.
5521 8. Two instances of the typo "uknown" in the source files are fixed.
5523 9. If a PERL_COMMAND setting in Local/Makefile was not at the start of a line,
5524 the Configure-Makefile script screwed up while processing it.
5526 10. Incorporated PCRE 4.4.
5528 11. The SMTP synchronization check was not operating right at the start of an
5529 SMTP session. For example, it could not catch a HELO sent before the client
5530 waited for the greeting. There is now a check for outstanding input at the
5531 point when the greeting is written. Because of the duplex, asynchronous
5532 nature of TCP/IP, it cannot be perfect - the incorrect input may be on its
5533 way, but not yet received, when the check is performed.
5535 12. Added tcp_nodelay to make it possible to turn of the setting of TCP_NODELAY
5536 on TCP/IP sockets, because this apparently causes some broken clients to
5539 13. Installed revised OS/Makefile-CYGWIN and OS/os.c-cygwin (the .h file was
5540 unchanged) from the Cygwin maintainer.
5542 14. The code for -bV that shows what is in the binary showed "mbx" when maildir
5543 was supported instead of testing for mbx. Effectively a typo.
5545 15. The spa authenticator server code was not checking that the input it
5546 received was valid base64.
5548 16. The debug output line for the "set" modifier in ACLs was not showing the
5549 name of the variable that was being set.
5551 17. Code tidy: the variable type "vtype_string" was never used. Removed it.
5553 18. Previously, a reference to $sender_host_name did not cause a DNS reverse
5554 lookup on its own. Something else was needed to trigger the lookup. For
5555 example, a match in host_lookup or the need for a host name in a host list.
5556 Now, if $sender_host_name is referenced and the host name has not yet been
5557 looked up, a lookup is performed. If the lookup fails, the variable remains
5558 empty, and $host_lookup_failed is set to "1".
5560 19. Added "eqi" as a case-independent comparison operator.
5562 20. The saslauthd authentication condition could segfault if neither service
5563 nor realm was specified.
5565 21. If an overflowing value such as "2048M" was set for message_size_limit, the
5566 error message that was logged was misleading, and incoming SMTP
5567 connections were dropped. The message is now more accurate, and temporary
5568 errors are given to SMTP connections.
5570 22. In some error situations (such as 21 above) Exim rejects all SMTP commands
5571 (except RSET) with a 421 error, until QUIT is received. However, it was
5572 failing to send a response to QUIT.
5574 23. The HELO ACL was being run before the code for helo_try_verify_hosts,
5575 which made it impossible to use "verify = helo" in the HELO ACL. The HELO
5576 ACL is now run after the helo_try_verify_hosts code.
5578 24. "{MD5}" and "{SHA1}" are now recognized as equivalent to "{md5"} and
5579 "{sha1}" in the "crypteq" expansion condition (in fact the comparison is
5580 case-independent, so other case variants are also recognized). Apparently
5581 some systems use these upper case variants.
5583 25. If more than two messages were waiting for the same host, and a transport
5584 filter was specified for the transport, Exim sent two messages over the
5585 same TCP/IP connection, and then failed with "socket operation on non-
5586 socket" when it tried to send the third.
5588 26. Added Exim::debug_write and Exim::log_write for embedded Perl use.
5590 27. The extern definition of crypt16() in expand.c was not being excluded when
5591 the OS had its own crypt16() function.
5593 28. Added bounce_return_body as a new option, and bounce_return_size_limit
5594 as a preferred synonym for return_size_limit, both as an option and as an
5597 29. Added LIBS=-liconv to OS/Makefile-OSF1.
5599 30. Changed the default configuration ACL to relax the local part checking rule
5600 for addresses that are not in any local domains. For these addresses,
5601 slashes and pipe symbols are allowed within local parts, but the sequence
5602 /../ is explicitly forbidden.
5604 31. SPA server authentication was not clearing the challenge buffer before
5607 32. log_message in a "warn" ACL statement was writing to the reject log as
5608 well as to the main log, which contradicts the documentation and doesn't
5609 seem right (because no rejection is happening). So I have stopped it.
5611 33. Added Ard Biesheuvel's lookup code for accessing an Interbase database.
5612 However, I am unable to do any testing of this.
5614 34. Fixed an infelicity in the appendfile transport. When checking directories
5615 for a mailbox, to see if any needed to be created, it was accidentally
5616 using path names with one or more superfluous leading slashes; tracing
5617 would show up entries such as stat("///home/ph10", 0xFFBEEA48).
5619 35. If log_message is set on a "discard" verb in a MAIL or RCPT ACL, its
5620 contents are added to the log line that is written for every discarded
5621 recipient. (Previously a log_message setting was ignored.)
5623 36. The ${quote: operator now quotes the string if it is empty.
5625 37. The install script runs exim in order to find its version number. If for
5626 some reason other than non-existence or emptiness, which it checks, it
5627 could not run './exim', it was installing it with an empty version number,
5628 i.e. as "exim-". This error state is now caught, and the installation is
5631 38. An argument was missing from the function that creates an error message
5632 when Exim fails to connect to the socket for saslauthd authentication.
5633 This could cause Exim to crash, or give a corrupted message.
5635 39. Added isip, isip4, and isip6 to ${if conditions.
5637 40. The ACL variables $acl_xx are now saved with the message, and can be
5638 accessed later in routers, transports, and filters.
5640 41. The new lookup type nwildlsearch is like wildlsearch, except that the key
5641 strings in the file are not string-expanded.
5643 42. If a MAIL command specified a SIZE value that was too large to fit into an
5644 int variable, the check against message_size_limit failed. Such values are
5645 now forced to INT_MAX, which is around 2Gb for a 32-bit variable. Maybe one
5646 day this will have to be increased, but I don't think I want to be around
5647 when emails are that large.
5654 1. Removed HAVE_ICONV=yes from OS/Makefile-FreeBSD, since it seems that
5655 iconv() is not standard in FreeBSD.
5657 2. Change 4.21/17 was buggy and could cause stack overwriting on a system with
5658 IPv6 enabled. The observed symptom was a segmentation fault on return from
5659 the function os_common_find_running_interfaces() in src/os.c.
5661 3. In the check_special_case() function in daemon.c I had used "errno" as an
5662 argument name, which causes warnings on some systems. This was basically a
5663 typo, since it was named "eno" in the comments!
5665 4. The code that waits for the clock to tick (at a resolution of some fraction
5666 of a second) so as to ensure message-id uniqueness was always waiting for
5667 at least one whole tick, when it could have waited for less. [This is
5668 almost certainly not relevant at current processor speeds, where it is
5669 unlikely to ever wait at all. But we try to future-proof.]
5671 5. The function that sleeps for a time interval that includes fractions of a
5672 second contained a race. It did not block SIGALRM between setting the
5673 timer, and suspending (a couple of lines later). If the interval was short
5674 and the sigsuspend() was delayed until after it had expired, the suspension
5675 never ended. On busy systems this could lead to processes getting stuck for
5678 6. Some uncommon configurations may cause a lookup to happen in a queue runner
5679 process, before it forks any delivery processes. The open lookup caching
5680 mechanism meant that the open file or database connection was passed into
5681 the delivery process. The problem was that delivery processes always tidy
5682 up cached lookup data. This could cause a problem for the next delivery
5683 process started by the queue runner, because the external queue runner
5684 process does not know about the closure. So the next delivery process
5685 still has data in the lookup cache. In the case of a file lookup, there was
5686 no problem because closing a file descriptor in a subprocess doesn't affect
5687 the parent. However, if the lookup was caching a connection to a database,
5688 the connection was closed, and the second delivery process was likely to
5689 see errors such as "PGSQL: query failed: server closed the connection
5690 unexpectedly". The problem has been fixed by closing all cached lookups
5691 in a queue runner before running a delivery process.
5693 7. Compiler warning on Linux for the second argument of iconv(), which doesn't
5694 seem to have the "const" qualifier which it has on other OS. I've
5697 8. Change 4.21/2 was too strict. It is only if there are two authenticators
5698 *of the same type* (client or server) with the same public name that an
5699 error should be diagnosed.
5701 9. When Exim looked up a host name for an IP address, but failed to find the
5702 original IP address when looking up the host name (a safety check), it
5703 output the message "<ip address> does not match any IP for NULL", which was
5704 confusing, to say the least. The bug was that the host name should have
5705 appeared instead of "NULL".
5707 10. Since release 3.03, if Exim is called by a uid other than root or the Exim
5708 user that is built into the binary, and the -C or -D options is used, root
5709 privilege is dropped before the configuration file is read. In addition,
5710 logging is switched to stderr instead of the normal log files. If the
5711 configuration then re-defines the Exim user, the unprivileged environment
5712 is probably not what is expected, so Exim logs a panic warning message (but
5715 However, if deliver_drop_privilege is set, the unprivileged state may well
5716 be exactly what is intended, so the warning has been cut out in that case,
5717 and Exim is allowed to try to write to its normal log files.
5723 1. smtp_return_error_details was not giving details for temporary sender
5724 or receiver verification errors.
5726 2. Diagnose a configuration error if two authenticators have the same public
5729 3. Exim used not to create the message log file for a message until the first
5730 delivery attempt. This could be confusing when incoming messages were held
5731 for policy or load reasons. The message log file is now created at the time
5732 the message is received, and an initial "Received" line is written to it.
5734 4. The automatically generated man page for command line options had a minor
5735 bug that caused no ill effects; however, a more serious problem was that
5736 the procedure for building the man page automatically didn't always
5737 operate. Consequently, release 4.20 contains an out-of-date version. This
5738 shouldn't happen again.
5740 5. When building Exim with embedded Perl support, the script that builds the
5741 Makefile was calling 'perl' to find its compile-time parameters, ignoring
5742 any setting of PERL_COMMAND in Local/Makefile. This is now fixed.
5744 6. The freeze_tell option was not being used for messages that were frozen on
5745 arrival, either by an ACL or by local_scan().
5747 7. Added the smtp_incomplete_transaction log selector.
5749 8. After STARTTLS, Exim was not forgetting that it had advertised AUTH, so it
5750 was accepting AUTH without a new EHLO.
5752 9. Added tls_remember_esmtp to cope with YAEB. This allows AUTH and other
5753 ESMTP extensions after STARTTLS without a new EHLO, in contravention of the
5756 10. Logging of TCP/IP connections (when configured) now happens in the main
5757 daemon process instead of the child process, so that the TCP/IP connection
5758 count is more accurate (but it can never be perfect).
5760 11. The use of "drop" in a nested ACL was not being handled correctly in the
5761 outer ACL. Now, if condition failure induced by the nested "drop" causes
5762 the outer ACL verb to deny access ("accept" or "discard" after "endpass",
5763 or "require"), the connection is dropped.
5765 12. Similarly, "discard" in a nested ACL wasn't being handled. A nested ACL
5766 that yield "discard" can now be used with an "accept" or a "discard" verb,
5767 but an error is generated for any others (because I can't see a useful way
5768 to define what should happen).
5770 13. When an ACL is read dynamically from a file (or anywhere else), the lines
5771 are now processed in the same way as lines in the Exim configuration file.
5772 In particular, continuation lines are supported.
5774 14. Added the "dnslists = a.b.c!=n.n.n.n" feature.
5776 15. Added -ti meaning -t -i.
5778 16. Check for letters, digits, hyphens, and dots in the names of dnslist
5779 domains, and warn by logging if others are found.
5781 17. At least on BSD, alignment is not guarenteed for the array of ifreq's
5782 returned from GIFCONF when Exim is trying to find the list of interfaces on
5783 a host. The code in os.c has been modified to copy each ifreq to an aligned
5784 structure in all cases.
5786 Also, in some cases, the returned ifreq's were being copied to a 'struct
5787 ifreq' on the stack, which was subsequently passed to host_ntoa(). That
5788 means the last couple of bytes of an IPv6 address could be chopped if the
5789 ifreq contained only a normal sockaddr (14 bytes storage).
5791 18. Named domain lists were not supported in the hosts_treat_as_local option.
5792 An entry such as +xxxx was not recognized, and was treated as a literal
5795 19. Ensure that header lines added by a DATA ACL are included in the reject log
5796 if the ACL subsequently rejects the message.
5798 20. Upgrade the cramtest.pl utility script to use Digest::MD5 instead of just
5799 MD5 (which is deprecated).
5801 21. When testing a filter file using -bf, Exim was writing a message when it
5802 took the sender from a "From " line in the message, but it was not doing so
5803 when it took $return_path from a Return-Path: header line. It now does.
5805 22. If the contents of a "message" modifier for a "warn" ACL verb do not begin
5806 with a valid header line field name (a series of printing characters
5807 terminated by a colon, Exim now inserts X-ACL-Warn: at the beginning.
5809 23. Changed "disc" in the source to "disk" to conform to the documentation and
5810 the book and for uniformity.
5812 24. Ignore Sendmail's -Ooption=value command line item.
5814 25. When execve() failed while trying to run a command in a pipe transport,
5815 Exim was returning EX_UNAVAILBLE (69) from the subprocess. However, this
5816 could be confused with a return value of 69 from the command itself. This
5817 has been changed to 127, the value the shell returns if it is asked to run
5818 a non-existent command. The wording for the related log line suggests a
5819 non-existent command as the problem.
5821 26. If received_header_text expands to an empty string, do not add a Received:
5822 header line to the message. (Well, it adds a token one on the spool, but
5823 marks it "old" so that it doesn't get used or transmitted.)
5825 27. Installed eximstats 1.28 (addition of -nt option).
5827 28. There was no check for failure on the call to getsockname() in the daemon
5828 code. This can fail if there is a shortage of resources on the system, with
5829 ENOMEM, for example. A temporary error is now given on failure.
5831 29. Contrary to the C standard, it seems that in some environments, the
5832 equivalent of setlocale(LC_ALL, "C") is not obeyed at the start of a C
5833 program. Exim now does this explicitly; it affects the formatting of
5834 timestamps using strftime().
5836 30. If exiqsumm was given junk data, it threw up some uninitialized variable
5837 complaints. I've now initialized all the variables, to avoid this.
5839 32. Header lines added by a system filter were not being "seen" during
5840 transport-time rewrites.
5842 33. The info_callback() function passed to OpenSSL is set up with type void
5843 (*)(SSL *, int, int), as described somewhere. However, when calling the
5844 function (actually a macro) that sets it up, the type void(*)() is
5845 expected. I've put in a cast to prevent warnings from picky compilers.
5847 34. If a DNS black list lookup found a CNAME record, but there were no A
5848 records associated with the domain it pointed at, Exim crashed.
5850 35. If a DNS black list lookup returned more than one A record, Exim ignored
5851 all but the first. It now scans all returned addresses if a particular IP
5852 value is being sought. In this situation, the contents of the
5853 $dnslist_value variable are a list of all the addresses, separated by a
5856 36. Tightened up the rules for host name lookups using reverse DNS. Exim used
5857 to accept a host name and all its aliases if the forward lookup for any of
5858 them yielded the IP address of the incoming connection. Now it accepts only
5859 those names whose forward lookup yields the correct IP address. Any other
5860 names are discarded. This closes a loophole whereby a rogue DNS
5861 administrator could create reverse DNS records to break through a
5862 wildcarded host restriction in an ACL.
5864 37. If a user filter or a system filter that ran in a subprocess used any of
5865 the numerical variables ($1, $2 etc), or $thisaddress, in a pipe command,
5866 the wrong values were passed to the pipe command ($thisaddress had the
5867 value of $0, $0 had the value of $1, etc). This bug was introduced by
5868 change 4.11/101, and not discovered because I wrote an inadequate test. :-(
5870 38. Improved the line breaking for long SMTP error messages from ACLs.
5871 Previously, if there was no break point between 40 and 75 characters, Exim
5872 left the rest of the message alone. Two changes have been made: (a) I've
5873 reduced the minimum length to 35 characters; (b) if it can't find a break
5874 point between 35 and 75 characters, it looks ahead and uses the first one
5875 that it finds. This may give the occasional overlong line, but at least the
5876 remaining text gets split now.
5878 39. Change 82 of 4.11 was unimaginative. It assumed the limit on the number of
5879 file descriptors might be low, and that setting 1000 would always raise it.
5880 It turns out that in some environments, the limit is already over 1000 and
5881 that lowering it causes trouble. So now Exim takes care not to decrease it.
5883 40. When delivering a message, the value of $return_path is set to $sender_
5884 address at the start of routing (routers may change the value). By an
5885 oversight, this default was not being set up when an address was tested by
5886 -bt or -bv, which affected the outcome if any router or filter referred to
5889 41. The idea of the "warn" ACL verb is that it adds a header or writes to the
5890 log only when "message" or "log_message" are set. However, if one of the
5891 conditions was an address verification, or a call to a nested ACL, the
5892 messages generated by the underlying test were being passed through. This
5893 no longer happens. The underlying message is available in $acl_verify_
5894 message for both "message" and "log_message" expansions, so it can be
5895 passed through if needed.
5897 42. Added RFC 2047 interpretation of header lines for $h_ expansions, with a
5898 new expansion $bh_ to give the encoded byte string without charset
5899 translation. Translation happens only if iconv() is available; HAVE_ICONV
5900 indicates this at build time. HEADERS_CHARSET gives the charset to
5901 translate to; headers_charset can change it in the configuration, and
5902 "headers charset" can change it in an individual filter file.
5904 43. Now that we have a default RFC 2047 charset (see above), the code in Exim
5905 that creates RFC 2047 encoded "words" labels them as that charset instead
5906 of always using iso-8859-1. The cases are (i) the explicit ${rfc2047:
5907 expansion operator; (ii) when Exim creates a From: line for a local
5908 message; (iii) when a header line is rewritten to include a "phrase" part.
5910 44. Nasty bug in exiqsumm: the regex to skip already-delivered addresses was
5911 buggy, causing it to skip the first lines of messages whose message ID
5912 ended in 'D'. This would not have bitten before Exim release 4.14, because
5913 message IDs were unlikely to end in 'D' before then. The effect was to have
5914 incorrect size information for certain domains.
5916 45. #include "config.h" was missing at the start of the crypt16.c module. This
5917 caused trouble on Tru64 (aka OSF1) systems, because HAVE_CRYPT16 was not
5920 46. If there was a timeout during a "random" callout check, Exim treated it as
5921 a failure of the random address, and carried on sending RSET and the real
5922 address. If the delay was just some slowness somewhere, the response to the
5923 original RCPT would be taken as a response to RSET and so on, causing
5924 mayhem of various kinds.
5926 47. Change 50 for 4.20 was a heap of junk. I don't know what I was thinking
5927 when I implemented it. It didn't allow for the fact that some option values
5928 may legitimatetly be negative (e.g. size_addition), and it didn't even do
5929 the right test for positive values.
5931 48. Domain names in DNS records are case-independent. Exim always looks them up
5932 in lower case. Some resolvers return domain names in exactly the case they
5933 appear in the zone file, that is, they may contain uppercase letters. Not
5934 all resolvers do this - some return always lower case. Exim was treating a
5935 change of case by a resolver as a change of domain, similar to a widening
5936 of a domain abbreviation. This triggered its re-routing code and so it was
5937 trying to route what was effectively the same domain again. This normally
5938 caused routing to fail (because the router wouldn't handle the domain
5939 twice). Now Exim checks for this case specially, and just changes the
5940 casing of the domain that it ultimately uses when it transmits the message
5943 49. Added Sieve (RFC 3028) support, courtesy of Michael Haardt's contributed
5946 50. If a filter generated a file delivery with a non-absolute name (possible if
5947 no home directory exists for the router), the forbid_file option was not
5950 51. Added '&' feature to dnslists, to provide bit mask matching in addition to
5951 the existing equality matching.
5953 52. Exim was using ints instead of ino_t variables in some places where it was
5954 dealing with inode numbers.
5956 53. If TMPDIR is defined in Local/Makefile (default in src/EDITME is
5957 TMPDIR="/tmp"), Exim checks for the presence of an environment variable
5958 called TMPDIR, and if it finds it is different, it changes its value.
5960 54. The smtp_printf() function is now made available to local_scan() so
5961 additional output lines can be written before returning. There is also an
5962 smtp_fflush() function to enable the detection of a dropped connection.
5963 The variables smtp_input and smtp_batched_input are exported to
5966 55. Changed the default runtime configuration: the message "Unknown user"
5967 has been removed from the ACL, and instead placed on the localuser router,
5968 using the cannot_route_message feature. This means that any verification
5969 failures that generate their own messages won't get overridden. Similarly,
5970 the "Unrouteable address" message that was in the ACL for unverifiable
5971 relay addresses has also been removed.
5973 56. Added hosts_avoid_esmtp to the smtp transport.
5975 57. The exicyclog script was not checking for the esoteric option
5976 CONFIGURE_FILE_USE_EUID in the Local/Makefile. It now does this, but it
5977 will work only if exicyclog is run under the appropriate euid.
5979 58. Following a discussion on the list, the rules by which Exim recognises line
5980 endings on incoming messages have been changed. The -dropcr and drop_cr
5981 options are now no-ops, retained only for backwards compatibility. The
5982 following line terminators are recognized: LF CRLF CR. However, special
5983 processing applies to CR:
5985 (i) The sequence CR . CR does *not* terminate an incoming SMTP message,
5986 nor a local message in the state where . is a terminator.
5988 (ii) If a bare CR is encountered in a header line, an extra space is added
5989 after the line terminator so as not to end the header. The reasoning
5990 behind this is that bare CRs in header lines are most likely either
5991 to be mistakes, or people trying to play silly games.
5993 59. The size of a message, as listed by "-bp" or in the Exim monitor window,
5994 was being incorrectly given as 18 bytes larger than it should have been.
5995 This is a VOB (very old bug).
5997 60. This may never have affected anything current, but just in case it has:
5998 When the local host is found other than at the start of a list of hosts,
5999 the local host, those with the same MX, and any that follow, are discarded.
6000 When the list in question was part of a longer list of hosts, the following
6001 hosts (not currently being processed) were also being discarded. This no
6002 longer happens. I'm not sure if this situation could ever has previously
6005 61. Added the "/MX" feature to lists of hosts in the manualroute and query
6008 62. Whenever Exim generates a new message, it now adds an Auto-Submitted:
6009 header. This is something that is recommended in a new Internet Draft, and
6010 is something that is documented as being done by Sendmail. There are two
6011 possible values. For messages generated by the autoreply transport, Exim
6014 Auto-Submitted: auto-replied
6016 whereas for all other generated messages (e.g. bounces) it adds
6018 Auto-Submitted: auto-generated
6020 63. The "personal" condition in filters now includes a test for the
6021 Auto-Submitted: header. If it contains the string "auto-" the message it
6022 not considered personal.
6024 64. Added rcpt_include_affixes as a generic transport option.
6026 65. Added queue_only_override (default true).
6028 66. Added the syslog_duplication option.
6030 67. If what should have been the first header line of a message consisted of
6031 a space followed by a colon, Exim was mis-interpreting it as a header line.
6032 It isn't of course - it is syntactically invalid and should therefore be
6033 treated as the start of the message body. The misbehaviour could have
6034 caused a number of strange effects, including loss of data in subsequent
6035 header lines, and spool format errors.
6037 68. Formerly, the AUTH parameter on a MAIL command was trusted only if the
6038 client host had authenticated. This control can now be exercised by an ACL
6039 for more flexibility.
6041 69. By default, callouts do not happen when testing with -bh. There is now a
6042 variant, -bhc, which does actually run the callout code, including
6043 consulting and updating the callout cache.
6045 70. Added support for saslauthd authentication, courtesy of Alexander
6048 71. If statvfs() failed on the spool or log directories while checking their
6049 size for availability, Exim confusingly gave the error "space shortage".
6050 Furthermore, in debugging mode it crashed with a floating point exception.
6051 These checks are done if check_{spool,log}_{space,inodes} are set, and when
6052 an SMTP message arrives with SIZE= on the MAIL command. As this is a really
6053 serious problem, Exim now writes to the main and panic logs when this
6054 happens, with details of the failure. It then refuses to accept the
6055 incoming message, giving the message "spool directory problem" or "log
6056 directory problem" with a 421 code for SMTP messages.
6058 72. When Exim is about to re-exec itself, it ensures that the file descriptors
6059 0, 1, and 2 exist, because some OS complain for execs without them (see
6060 ChangeLog 4.05/30). If necessary, Exim opens /dev/null to use for these
6061 descriptors. However, the code omitted to check that the open succeeded,
6062 causing mysterious errors if for some reason the permissions on /dev/null
6063 got screwed. Now Exim writes a message to the main and panic logs, and
6064 bombs out if it can't open /dev/null.
6066 73. Re-vamped the way daemon_smtp_port, local_interfaces, and -oX work and
6067 interact so that it is all more flexible. It is supposed to remain
6068 backwards compatible. Also added extra_local_interfaces.
6070 74. Invalid data sent to a SPA (NTLM) server authenticator could cause the code
6071 to bomb out with an assertion failure - to the client this appears as a
6072 connection drop. This problem occurs in the part of the code that was taken
6073 from the Samba project. Fortunately, the assertion is in a very simple
6074 function, so I have fixed this by reproducing the function inline in the
6075 one place where it is called, and arranging for authentication to fail
6076 instead of killing the process with assert().
6078 75. The SPA client code was not working when the server requested OEM rather
6079 than Unicode encoding.
6081 76. Added code to make require_files with a specific uid setting more usable in
6082 the case where statting the file as root fails - usually a non-root-mounted
6083 NFS file system. When this happens and the failure is EACCES, Exim now
6084 forks a subprocess and does the per-uid checking as the relevant uid.
6086 77. Added process_log_path.
6088 78. If log_file_path was not explicitly set, a setting of check_log_space or
6089 check_log_inodes was ignored.
6091 79. If a space check for the spool or log partitions fails, the incident is now
6092 logged. Of course, in the latter case the data may get lost...
6094 80. Added the %p formatting code to string_format() so that it can be used to
6095 print addresses in debug_print(). Adjusted all the address printing in the
6096 debugging in store.c to use %p rather than %d.
6098 81. There was a concern that a line of code in smtp_in.c could overflow a
6099 buffer if a HELO/EHLO command was given followed by 500 or so spaces. As
6100 initially expressed, the concern was not well-founded, because trailing
6101 spaces are removed early. However, if the trailing spaces were followed by
6102 a NULL, they did not get removed, so the overflow was possible. Two fixes
6105 (a) I re-wrote the offending code in a cleaner fashion.
6106 (b) If an incoming SMTP command contains a NULL character, it is rejected
6109 82. When Exim changes uid/gid to the Exim user at daemon start time, it now
6110 runs initgroups(), so that if the Exim user is in any additional groups,
6111 they will be used during message reception.
6117 The change log for 4.20 and earlier releases has been archived.
projects / exim.git / blob