1 Change log file for Exim from version 4.21
2 -------------------------------------------
8 TF/01 Correctly close the server side of TLS when forking for delivery.
10 When a message was received over SMTP with TLS, Exim failed to clear up
11 the incoming connection properly after forking off the child process to
12 deliver the message. In some situations the subsequent outgoing
13 delivery connection happened to have the same fd number as the incoming
14 connection previously had. Exim would try to use TLS and fail, logging
15 a "Bad file descriptor" error.
17 TF/02 Portability fix for building lookup modules on Solaris when the xpg4
18 utilities have not been installed.
20 JH/01 Fix memory-handling in use of acl as a conditional; avoid free of
21 temporary space as the ACL may create new global variables.
23 TL/01 LDAP support uses per connection or global context settings, depending
24 upon the detected version of the libraries at build time.
26 TL/02 Experimental Proxy Protocol support: allows a proxied SMTP connection
27 to extract and use the src ip:port in logging and expansions as if it
28 were a direct connection from the outside internet. PPv2 support was
29 updated based on HAProxy spec change in May 2014.
31 JH/02 Add ${listextract {number}{list}{success}{fail}}.
33 TL/03 Bugzilla 1433: Fix DMARC SEGV with specific From header contents.
34 Properly escape header and check for NULL return.
36 PP/01 Continue incomplete 4.82 PP/19 by fixing docs too: use dns_dnssec_ok
39 JH/03 Bugzilla 1157: support log_selector smtp_confirmation for lmtp.
41 TL/04 Add verify = header_names_ascii check to reject email with non-ASCII
42 characters in header names, implemented as a verify condition.
43 Contributed by Michael Fischer v. Mollard.
45 TL/05 Rename SPF condition results err_perm and err_temp to standardized
46 results permerror and temperror. Previous values are deprecated but
47 still accepted. In a future release, err_perm and err_temp will be
48 completely removed, which will be a backward incompatibility if the
49 ACL tests for either of these two old results. Patch contributed by
50 user bes-internal on the mailing list.
52 JH/04 Add ${utf8clean:} operator. Contributed by Alex Rau.
54 JH/05 Bugzilla 305: Log incoming-TLS details on rejects, subject to log
55 selectors, in both main and reject logs.
57 JH/06 Log outbound-TLS and port details, subject to log selectors, for a
60 JH/07 Add malware type "sock" for talking to simple daemon.
62 JH/08 Bugzilla 1371: Add tls_{,try_}verify_hosts to smtp transport.
64 JH/09 Bugzilla 1431: Support (with limitations) headers_add/headers_remove in
65 routers/transports under cutthrough routing.
67 JH/10 Bugzilla 1005: ACL "condition =" should accept values which are negative
68 numbers. Touch up "bool" conditional to keep the same definition.
70 TL/06 Remove duplicated language in spec file from 4.82 TL/16.
72 JH/11 Add dnsdb tlsa lookup. From Todd Lyons.
74 JH/12 Expand items in router/transport headers_add or headers_remove lists
75 individually rather than the list as a whole. Bug 1452.
77 Required for reasonable handling of multiple headers_ options when
78 they may be empty; requires that headers_remove items with embedded
79 colons must have them doubled (or the list-separator changed).
81 TL/07 Add new dmarc expansion variable $dmarc_domain_policy to directly
82 view the policy declared in the DMARC record. Currently, $dmarc_status
83 is a combined value of both the record presence and the result of the
86 JH/13 Fix handling of $tls_cipher et.al. in (non-verify) transport. Bug 1455.
88 JH/14 New options dnssec_request_domains, dnssec_require_domains on the
89 dnslookup router and the smtp transport (applying to the forward
92 TL/08 Bugzilla 1453: New LDAP "SERVERS=" option allows admin to override list
93 of ldap servers used for a specific lookup. Patch provided by Heiko
96 JH/18 New options dnssec_lax, dnssec_strict on dnsdb lookups.
97 New variable $lookup_dnssec_authenticated for observability.
99 TL/09 Bugzilla 609: Add -C option to exiqgrep, specify which exim.conf to use.
100 Patch submitted by Lars Timman.
102 JH/19 EXPERIMENTAL_OCSP support under GnuTLS. Bug 1459.
104 TL/10 Bugzilla 1454: New -oMm option to pass message reference to Exim.
105 Requires trusted mode and valid format message id, aborts otherwise.
106 Patch contributed by Heiko Schlichting.
108 JH/20 New expansion variables tls_(in,out)_(our,peer)cert, and expansion item
109 certextract with support for various fields. Bug 1358.
111 JH/21 Observability of OCSP via variables tls_(in,out)_ocsp. Stapling
112 is requested by default, modifiable by smtp transport option
115 JH/22 Expansion operators ${md5:string} and ${sha1:string} can now
116 operate on certificate variables to give certificate fingerprints
117 Also new ${sha256:cert_variable}.
119 JH/23 The PRDR feature is moved from being Experimental into the mainline.
121 TL/11 Bug 1119: fix memory allocation in string_printing2(). Patch from
122 Christian Aistleitner.
124 JH/24 The OCSP stapling feature is moved from Experimental into the mainline.
126 TL/12 Bug 1444: Fix improper \r\n sequence handling when writing spool
127 file. Patch from Wolfgang Breyha.
129 JH/25 Expand the coverage of the delivery $host and $host_address to
130 client authenticators run in verify callout. Bug 1476.
132 JH/26 Port service names are now accepted for tls_on_connect_ports, to
133 align with daemon_smtp_ports. Bug 72.
135 TF/03 Fix udpsend. The ip_connectedsocket() function's socket type
136 support and error reporting did not work properly.
138 TL/13 Bug 1495: Exiqgrep check if -C config file specified on cli exists
139 and is readable. Patch from Andrew Colin Kissa.
145 PP/01 Add -bI: framework, and -bI:sieve for querying sieve capabilities.
147 PP/02 Make -n do something, by making it not do something.
148 When combined with -bP, the name of an option is not output.
150 PP/03 Added tls_dh_min_bits SMTP transport driver option, only honoured
153 PP/04 First step towards DNSSEC, provide $sender_host_dnssec for
154 $sender_host_name and config options to manage this, and basic check
157 PP/05 DSCP support for outbound connections and control modifier for inbound.
159 PP/06 Cyrus SASL: set local and remote IP;port properties for driver.
160 (Only plugin which currently uses this is kerberos4, which nobody should
161 be using, but we should make it available and other future plugins might
162 conceivably use it, even though it would break NAT; stuff *should* be
163 using channel bindings instead).
165 PP/07 Handle "exim -L <tag>" to indicate to use syslog with tag as the process
166 name; added for Sendmail compatibility; requires admin caller.
167 Handle -G as equivalent to "control = suppress_local_fixups" (we used to
168 just ignore it); requires trusted caller.
169 Also parse but ignore: -Ac -Am -X<logfile>
172 TL/01 Bugzilla 1258 - Refactor MAIL FROM optional args processing.
174 TL/02 Add +smtp_confirmation as a default logging option.
176 TL/03 Bugzilla 198 - Implement remove_header ACL modifier.
177 Patch by Magnus Holmgren from 2007-02-20.
179 TL/04 Bugzilla 1281 - Spec typo.
180 Bugzilla 1283 - Spec typo.
181 Bugzilla 1290 - Spec grammar fixes.
183 TL/05 Bugzilla 1285 - Spec omission, fix docbook errors for spec.txt creation.
185 TL/06 Add Experimental DMARC support using libopendmarc libraries.
187 TL/07 Fix an out of order global option causing a segfault. Reported to dev
188 mailing list by by Dmitry Isaikin.
190 JH/01 Bugzilla 1201 & 304 - New cutthrough-delivery feature, with TLS support.
192 JH/02 Support "G" suffix to numbers in ${if comparisons.
194 PP/08 Handle smtp transport tls_sni option forced-fail for OpenSSL.
196 NM/01 Bugzilla 1197 - Spec typo
197 Bugzilla 1196 - Spec examples corrections
199 JH/03 Add expansion operators ${listnamed:name} and ${listcount:string}
201 PP/09 Add gnutls_allow_auto_pkcs11 option (was originally called
202 gnutls_enable_pkcs11, but renamed to more accurately indicate its
205 PP/10 Let Linux makefile inherit CFLAGS/CFLAGS_DYNAMIC.
206 Pulled from Debian 30_dontoverridecflags.dpatch by Andreas Metzler.
208 JH/04 Add expansion item ${acl {name}{arg}...}, expansion condition
209 "acl {{name}{arg}...}", and optional args on acl condition
212 JH/05 Permit multiple router/transport headers_add/remove lines.
214 JH/06 Add dnsdb pseudo-lookup "a+" to do an "aaaa" + "a" combination.
216 JH/07 Avoid using a waiting database for a single-message-only transport.
217 Performance patch from Paul Fisher. Bugzilla 1262.
219 JH/08 Strip leading/trailing newlines from add_header ACL modifier data.
222 JH/09 Add $headers_added variable, with content from use of ACL modifier
223 add_header (but not yet added to the message). Bugzilla 199.
225 JH/10 Add 8bitmime log_selector, for 8bitmime status on the received line.
226 Pulled from Bugzilla 817 by Wolfgang Breyha.
228 PP/11 SECURITY: protect DKIM DNS decoding from remote exploit.
230 (nb: this is the same fix as in Exim 4.80.1)
232 JH/11 Add A= logging on delivery lines, and a client_set_id option on
235 JH/12 Add optional authenticated_sender logging to A= and a log_selector
238 PP/12 Unbreak server_set_id for NTLM/SPA auth, broken by 4.80 PP/29.
240 PP/13 Dovecot auth: log better reason to rejectlog if Dovecot did not
241 advertise SMTP AUTH mechanism to us, instead of a generic
242 protocol violation error. Also, make Exim more robust to bad
243 data from the Dovecot auth socket.
245 TF/01 Fix ultimate retry timeouts for intermittently deliverable recipients.
247 When a queue runner is handling a message, Exim first routes the
248 recipient addresses, during which it prunes them based on the retry
249 hints database. After that it attempts to deliver the message to
250 any remaining recipients. It then updates the hints database using
253 So if a recipient address works intermittently, it can get repeatedly
254 deferred at routing time. The retry hints record remains fresh so the
255 address never reaches the final cutoff time.
257 This is a fairly common occurrence when a user is bumping up against
258 their storage quota. Exim had some logic in its local delivery code
259 to deal with this. However it did not apply to per-recipient defers
260 in remote deliveries, e.g. over LMTP to a separate IMAP message store.
262 This change adds a proper retry rule check during routing so that the
263 final cutoff time is checked against the message's age. We only do
264 this check if there is an address retry record and there is not a
265 domain retry record; this implies that previous attempts to handle
266 the address had the retry_use_local_parts option turned on. We use
267 this as an approximation for the destination being like a local
268 delivery, as in LMTP.
270 I suspect this new check makes the old local delivery cutoff check
271 redundant, but I have not verified this so I left the code in place.
273 TF/02 Correct gecos expansion when From: is a prefix of the username.
275 Test 0254 submits a message to Exim with the header
279 When I ran the test suite under the user fanf2, Exim expanded
280 the header to contain my full name, whereas it should have added
281 a Resent-Sender: header. It erroneously treats any prefix of the
282 username as equal to the username.
284 This change corrects that bug.
286 GF/01 DCC debug and logging tidyup
287 Error conditions log to paniclog rather than rejectlog.
288 Debug lines prefixed by "DCC: " to remove any ambiguity.
290 TF/03 Avoid unnecessary rebuilds of lookup-related code.
292 PP/14 Fix OCSP reinitialisation in SNI handling for Exim/TLS as server.
293 Bug spotted by Jeremy Harris; was flawed since initial commit.
294 Would have resulted in OCSP responses post-SNI triggering an Exim
295 NULL dereference and crash.
297 JH/13 Add $router_name and $transport_name variables. Bugzilla 308.
299 PP/15 Define SIOCGIFCONF_GIVES_ADDR for GNU Hurd.
300 Bug detection, analysis and fix by Samuel Thibault.
301 Bugzilla 1331, Debian bug #698092.
303 SC/01 Update eximstats to watch out for senders sending 'HELO [IpAddr]'
305 JH/14 SMTP PRDR (http://www.eric-a-hall.com/specs/draft-hall-prdr-00.txt).
306 Server implementation by Todd Lyons, client by JH.
307 Only enabled when compiled with EXPERIMENTAL_PRDR. A new
308 config variable "prdr_enable" controls whether the server
309 advertises the facility. If the client requests PRDR a new
310 acl_data_smtp_prdr ACL is called once for each recipient, after
311 the body content is received and before the acl_smtp_data ACL.
312 The client is controlled by bolth of: a hosts_try_prdr option
313 on the smtp transport, and the server advertisement.
314 Default client logging of deliveries and rejections involving
315 PRDR are flagged with the string "PRDR".
317 PP/16 Fix problems caused by timeouts during quit ACLs trying to double
318 fclose(). Diagnosis by Todd Lyons.
320 PP/17 Update configure.default to handle IPv6 localhost better.
321 Patch by Alain Williams (plus minor tweaks).
324 PP/18 OpenSSL made graceful with empty tls_verify_certificates setting.
325 This is now consistent with GnuTLS, and is now documented: the
326 previous undocumented portable approach to treating the option as
327 unset was to force an expansion failure. That still works, and
328 an empty string is now equivalent.
330 PP/19 Renamed DNSSEC-enabling option to "dns_dnssec_ok", to make it
331 clearer that Exim is using the DO (DNSSEC OK) EDNS0 resolver flag,
332 not performing validation itself.
334 PP/20 Added force_command boolean option to pipe transport.
335 Patch from Nick Koston, of cPanel Inc.
337 JH/15 AUTH support on callouts (and hence cutthrough-deliveries).
340 TF/04 Added udpsend ACL modifer and hexquote expansion operator
342 PP/21 Fix eximon continuous updating with timestamped log-files.
343 Broken in a format-string cleanup in 4.80, missed when I repaired the
344 other false fix of the same issue.
345 Report and fix from Heiko Schlichting.
348 PP/22 Guard LDAP TLS usage against Solaris LDAP variant.
349 Report from Prashanth Katuri.
351 PP/23 Support safari_ecdhe_ecdsa_bug for openssl_options.
352 It's SecureTransport, so affects any MacOS clients which use the
353 system-integrated TLS libraries, including email clients.
355 PP/24 Fix segfault from trying to fprintf() to a NULL stdio FILE* if
356 using a MIME ACL for non-SMTP local injection.
357 Report and assistance in diagnosis by Warren Baker.
359 TL/08 Adjust exiqgrep to be case-insensitive for sender/receiver.
361 JH/16 Fix comparisons for 64b. Bugzilla 1385.
363 TL/09 Add expansion variable $authenticated_fail_id to keep track of
364 last id that failed so it may be referenced in subsequent ACL's.
366 TL/10 Bugzilla 1375 - Prevent TLS rebinding in ldap. Patch provided by
369 TL/11 Bugzilla 1382 - Option ldap_require_cert overrides start_tls
370 ldap library initialization, allowing self-signed CA's to be
371 used. Also properly sets require_cert option later in code by
372 using NULL (global ldap config) instead of ldap handle (per
373 session). Bug diagnosis and testing by alxgomz.
375 TL/12 Enhanced documentation in the ratelimit.pl script provided in
376 the src/util/ subdirectory.
378 TL/13 Bug 1031 - Imported transport SQL logging patch from Axel Rau
379 renamed to Transport Post Delivery Action by Jeremy Harris, as
382 TL/14 Bugzilla 1217 - Redis lookup support has been added. It is only enabled
383 when Exim is compiled with EXPERIMENTAL_REDIS. A new config variable
384 redis_servers = needs to be configured which will be used by the redis
385 lookup. Patch from Warren Baker, of The Packet Hub.
387 TL/15 Fix exiqsumm summary for corner case. Patch provided by Richard Hall.
389 TL/16 Bugzilla 1289 - Clarify host/ip processing when have errors looking up a
390 hostname or reverse DNS when processing a host list. Used suggestions
391 from multiple comments on this bug.
393 TL/17 Bugzilla 1057 - Multiple clamd TCP targets patch from Mark Zealey.
395 TL/18 Had previously added a -CONTINUE option to runtest in the test suite.
396 Missed a few lines, added it to make the runtest require no keyboard
399 TL/19 Bugzilla 1402 - Test 533 fails if any part of the path to the test suite
400 contains upper case chars. Make router use caseful_local_part.
402 TL/20 Bugzilla 1400 - Add AVOID_GNUTLS_PKCS11 build option. Allows GnuTLS
403 support when GnuTLS has been built with p11-kit.
409 PP/01 SECURITY: protect DKIM DNS decoding from remote exploit.
411 This, or similar/improved, will also be change PP/11 of 4.82.
417 PP/01 Handle short writes when writing local log-files.
418 In practice, only affects FreeBSD (8 onwards).
419 Bugzilla 1053, with thanks to Dmitry Isaikin.
421 NM/01 Bugzilla 949 - Documentation tweak
423 NM/02 Bugzilla 1093 - eximstats DATA reject detection regexps
426 NM/03 Bugzilla 1169 - primary_hostname spelling was incorrect in docs.
428 PP/02 Implemented gsasl authenticator.
430 PP/03 Implemented heimdal_gssapi authenticator with "server_keytab" option.
432 PP/04 Local/Makefile support for (AUTH|LOOKUP)_*_PC=foo to use
433 `pkg-config foo` for cflags/libs.
435 PP/05 Swapped $auth1/$auth2 for gsasl GSSAPI mechanism, to be more consistent
436 with rest of GSASL and with heimdal_gssapi.
438 PP/06 Local/Makefile support for USE_(GNUTLS|OPENSSL)_PC=foo to use
439 `pkg-config foo` for cflags/libs for the TLS implementation.
441 PP/07 New expansion variable $tls_bits; Cyrus SASL server connection
442 properties get this fed in as external SSF. A number of robustness
443 and debugging improvements to the cyrus_sasl authenticator.
445 PP/08 cyrus_sasl server now expands the server_realm option.
447 PP/09 Bugzilla 1214 - Log authentication information in reject log.
448 Patch by Jeremy Harris.
450 PP/10 Added dbmjz lookup type.
452 PP/11 Let heimdal_gssapi authenticator take a SASL message without an authzid.
454 PP/12 MAIL args handles TAB as well as SP, for better interop with
455 non-compliant senders.
456 Analysis and variant patch by Todd Lyons.
458 NM/04 Bugzilla 1237 - fix cases where printf format usage not indicated
459 Bug report from Lars Müller <lars@samba.org> (via SUSE),
460 Patch from Dirk Mueller <dmueller@suse.com>
462 PP/13 tls_peerdn now print-escaped for spool files.
463 Observed some $tls_peerdn in wild which contained \n, which resulted
464 in spool file corruption.
466 PP/14 TLS fixes for OpenSSL: support TLS 1.1 & 1.2; new "openssl_options"
467 values; set SSL_MODE_AUTO_RETRY so that OpenSSL will retry a read
468 or write after TLS renegotiation, which otherwise led to messages
471 TK/01 Bugzilla 1239 - fix DKIM verification when signature was not inserted
472 as a tracking header (ie: a signed header comes before the signature).
473 Patch from Wolfgang Breyha.
475 JH/01 Bugzilla 660 - Multi-valued attributes from ldap now parseable as a
476 comma-sep list; embedded commas doubled.
478 JH/02 Refactored ACL "verify =" logic to table-driven dispatch.
480 PP/15 LDAP: Check for errors of TLS initialisation, to give correct
482 Report and patch from Dmitry Banschikov.
484 PP/16 Removed "dont_insert_empty_fragments" fron "openssl_options".
485 Removed SSL_clear() after SSL_new() which led to protocol negotiation
486 failures. We appear to now support TLS1.1+ with Exim.
488 PP/17 OpenSSL: new expansion var $tls_sni, which if used in tls_certificate
489 lets Exim select keys and certificates based upon TLS SNI from client.
490 Also option tls_sni on SMTP Transports. Also clear $tls_bits correctly
491 before an outbound SMTP session. New log_selector, +tls_sni.
493 PP/18 Bugzilla 1122 - check localhost_number expansion for failure, avoid
494 NULL dereference. Report and patch from Alun Jones.
496 PP/19 DNS resolver init changes for NetBSD compatibility. (Risk of breakage
497 on less well tested platforms). Obviates NetBSD pkgsrc patch-ac.
498 Not seeing resolver debug output on NetBSD, but suspect this is a
499 resolver implementation change.
501 PP/20 Revert part of NM/04, it broke log_path containing %D expansions.
502 Left warnings. Added "eximon gdb" invocation mode.
504 PP/21 Defaulting "accept_8bitmime" to true, not false.
506 PP/22 Added -bw for inetd wait mode support.
508 PP/23 Added PCRE_CONFIG=yes support to Makefile for using pcre-config to
509 locate the relevant includes and libraries. Made this the default.
511 PP/24 Fixed headers_only on smtp transports (was not sending trailing dot).
512 Bugzilla 1246, report and most of solution from Tomasz Kusy.
514 JH/03 ${eval } now uses 64-bit and supports a "g" suffix (like to "k" and "m").
515 This may cause build issues on older platforms.
517 PP/25 Revamped GnuTLS support, passing tls_require_ciphers to
518 gnutls_priority_init, ignoring Exim options gnutls_require_kx,
519 gnutls_require_mac & gnutls_require_protocols (no longer supported).
520 Added SNI support via GnuTLS too.
521 Made ${randint:..} supplier available, if using not-too-old GnuTLS.
523 PP/26 Added EXPERIMENTAL_OCSP for OpenSSL.
525 PP/27 Applied dnsdb SPF support patch from Janne Snabb.
526 Applied second patch from Janne, implementing suggestion to default
527 multiple-strings-in-record handling to match SPF spec.
529 JH/04 Added expansion variable $tod_epoch_l for a higher-precision time.
531 PP/28 Fix DCC dcc_header content corruption (stack memory referenced,
532 read-only, out of scope).
533 Patch from Wolfgang Breyha, report from Stuart Northfield.
535 PP/29 Fix three issues highlighted by clang analyser static analysis.
536 Only crash-plausible issue would require the Cambridge-specific
537 iplookup router and a misconfiguration.
538 Report from Marcin Mirosław.
540 PP/30 Another attempt to deal with PCRE_PRERELEASE, this one less buggy.
542 PP/31 %D in printf continues to cause issues (-Wformat=security), so for
543 now guard some of the printf checks behind WANT_DEEPER_PRINTF_CHECKS.
544 As part of this, removing so much warning spew let me fix some minor
545 real issues in debug logging.
547 PP/32 GnuTLS was always using default tls_require_ciphers, due to a missing
548 assignment on my part. Fixed.
550 PP/33 Added tls_dh_max_bits option, defaulting to current hard-coded limit
551 of NSS, for GnuTLS/NSS interop. Problem root cause diagnosis by
552 Janne Snabb (who went above and beyond: thank you).
554 PP/34 Validate tls_require_ciphers on startup, since debugging an invalid
555 string otherwise requires a connection and a bunch more work and it's
556 relatively easy to get wrong. Should also expose TLS library linkage
559 PP/35 Pull in <features.h> on Linux, for some portability edge-cases of
560 64-bit ${eval} (JH/03).
562 PP/36 Define _GNU_SOURCE in exim.h; it's needed for some releases of
563 GNU libc to support some of the 64-bit stuff, should not lead to
564 conflicts. Defined before os.h is pulled in, so if a given platform
565 needs to override this, it can.
567 PP/37 Unbreak Cyrus SASL auth: SSF retrieval was incorrect, Exim thought
568 protection layer was required, which is not implemented.
569 Bugzilla 1254, patch from Wolfgang Breyha.
571 PP/38 Overhaul DH prime handling, supply RFC-specified DH primes as built
572 into Exim, default to IKE id 23 from RFC 5114 (2048 bit). Make
573 tls_dhparam take prime identifiers. Also unbreak combination of
574 OpenSSL+DH_params+TLSSNI.
576 PP/39 Disable SSLv2 by default in OpenSSL support.
582 PP/01 Solaris build fix for Oracle's LDAP libraries.
583 Bugzilla 1109, patch from Stephen Usher.
585 TF/01 HP/UX build fix: avoid arithmetic on a void pointer.
587 TK/01 DKIM Verification: Fix relaxed canon for empty headers w/o
590 TF/02 Fix a couple more cases where we did not log the error message
591 when unlink() failed. See also change 4.74-TF/03.
593 TF/03 Make the exiwhat support code safe for signals. Previously Exim might
594 lock up or crash if it happened to be inside a call to libc when it
595 got a SIGUSR1 from exiwhat.
597 The SIGUSR1 handler appends the current process status to the process
598 log which is later printed by exiwhat. It used to use the general
599 purpose logging code to do this, but several functions it calls are
600 not safe for signals.
602 The new output code in the SIGUSR1 handler is specific to the process
603 log, and simple enough that it's easy to inspect for signal safety.
604 Removing some special cases also simplifies the general logging code.
605 Removing the spurious timestamps from the process log simplifies
608 TF/04 Improved ratelimit ACL condition.
610 The /noupdate option has been deprecated in favour of /readonly which
611 has clearer semantics. The /leaky, /strict, and /readonly update modes
612 are mutually exclusive. The update mode is no longer included in the
613 database key; it just determines when the database is updated. (This
614 means that when you upgrde Exim will forget old rate measurements.)
616 Exim now checks that the per_* options are used with an update mode that
617 makes sense for the current ACL. For example, when Exim is processing a
618 message (e.g. acl_smtp_rcpt or acl_smtp_data, etc.) you can specify
619 per_mail/leaky or per_mail/strict; otherwise (e.g. in acl_smtp_helo) you
620 must specify per_mail/readonly. If you omit the update mode it defaults to
621 /leaky where that makes sense (as before) or /readonly where required.
623 The /noupdate option is now undocumented but still supported for
624 backwards compatibility. It is equivalent to /readonly except that in
625 ACLs where /readonly is required you may specify /leaky/noupdate or
626 /strict/noupdate which are treated the same as /readonly.
628 A useful new feature is the /count= option. This is a generalization
629 of the per_byte option, so that you can measure the throughput of other
630 aggregate values. For example, the per_byte option is now equivalent
631 to per_mail/count=${if >{0}{$message_size} {0} {$message_size} }.
633 The per_rcpt option has been generalized using the /count= mechanism
634 (though it's more complicated than the per_byte equivalence). When it is
635 used in acl_smtp_rcpt, the per_rcpt option adds recipients to the
636 measured rate one at a time; if it is used later (e.g. in acl_smtp_data)
637 or in a non-SMTP ACL it adds all the recipients in one go. (The latter
638 /count=$recipients_count behaviour used to work only in non-SMTP ACLs.)
639 Note that using per_rcpt with a non-readonly update mode in more than
640 one ACL will cause the recipients to be double-counted. (The per_mail
641 and per_byte options don't have this problem.)
643 The handling of very low rates has changed slightly. If the computed rate
644 is less than the event's count (usually one) then this event is the first
645 after a long gap. In this case the rate is set to the same as this event's
646 count, so that the first message of a spam run is counted properly.
648 The major new feature is a mechanism for counting the rate of unique
649 events. The new per_addr option counts the number of different
650 recipients that someone has sent messages to in the last time period. It
651 behaves like per_rcpt if all the recipient addresses are different, but
652 duplicate recipient addresses do not increase the measured rate. Like
653 the /count= option this is a general mechanism, so the per_addr option
654 is equivalent to per_rcpt/unique=$local_part@$domain. You can, for
655 example, measure the rate that a client uses different sender addresses
656 with the options per_mail/unique=$sender_address. There are further
657 details in the main documentation.
659 TF/05 Removed obsolete $Cambridge$ CVS revision strings.
661 TF/06 Removed a few PCRE remnants.
663 TF/07 Automatically extract Exim's version number from tags in the git
664 repository when doing development or release builds.
666 PP/02 Raise smtp_cmd_buffer_size to 16kB.
667 Bugzilla 879. Patch from Paul Fisher.
669 PP/03 Implement SSL-on-connect outbound with protocol=smtps on smtp transport.
670 Heavily based on revision 40f9a89a from Simon Arlott's tree.
673 PP/04 Use .dylib instead of .so for dynamic library loading on MacOS.
675 PP/05 Variable $av_failed, true if the AV scanner deferred.
676 Bugzilla 1078. Patch from John Horne.
678 PP/06 Stop make process more reliably on build failure.
679 Bugzilla 1087. Patch from Heiko Schlittermann.
681 PP/07 Make maildir_use_size_file an _expandable_ boolean.
682 Bugzilla 1089. Patch from Heiko Schlittermann.
684 PP/08 Handle ${run} returning more data than OS pipe buffer size.
685 Bugzilla 1131. Patch from Holger Weiß.
687 PP/09 Handle IPv6 addresses with SPF.
688 Bugzilla 860. Patch from Wolfgang Breyha.
690 PP/10 GnuTLS: support TLS 1.2 & 1.1.
692 Use gnutls_certificate_verify_peers2() [patch from Andreas Metzler].
695 PP/11 match_* no longer expand right-hand-side by default.
696 New compile-time build option, EXPAND_LISTMATCH_RHS.
697 New expansion conditions, "inlist", "inlisti".
699 PP/12 fix uninitialised greeting string from PP/03 (smtps client support).
701 PP/13 shell and compiler warnings fixes for RC1-RC4 changes.
703 PP/14 fix log_write() format string regression from TF/03.
704 Bugzilla 1152. Patch from Dmitry Isaikin.
710 PP/01 The new ldap_require_cert option would segfault if used. Fixed.
712 PP/02 Harmonised TLS library version reporting; only show if debugging.
713 Layout now matches that introduced for other libraries in 4.74 PP/03.
715 PP/03 New openssl_options items: no_sslv2 no_sslv3 no_ticket no_tlsv1
717 PP/04 New "dns_use_edns0" global option.
719 PP/05 Don't segfault on misconfiguration of ref:name exim-user as uid.
722 PP/06 Extra paranoia around buffer usage at the STARTTLS transition.
723 nb: Exim is not vulnerable to http://www.kb.cert.org/vuls/id/555316
725 TK/01 Updated PolarSSL code to 0.14.2.
726 Bugzilla 1097. Patch from Andreas Metzler.
728 PP/07 Catch divide-by-zero in ${eval:...}.
731 PP/08 Condition negation of bool{}/bool_lax{} did not negate. Fixed.
734 TK/02 Bugzilla 1106: CVE-2011-1764 - DKIM log line was subject to a
735 format-string attack -- SECURITY: remote arbitrary code execution.
737 TK/03 SECURITY - DKIM signature header parsing was double-expanded, second
738 time unintentionally subject to list matching rules, letting the header
739 cause arbitrary Exim lookups (of items which can occur in lists, *not*
740 arbitrary string expansion). This allowed for information disclosure.
742 PP/09 Fix another SIGFPE (x86) in ${eval:...} expansion, this time related to
743 INT_MIN/-1 -- value coerced to INT_MAX.
749 NM/01 Workround for PCRE version dependency in version reporting
752 TF/01 Update valgrind.h and memcheck.h to copies from valgrind-3.6.0.
753 This fixes portability to compilers other than gcc, notably
754 Solaris CC and HP-UX CC. Fixes Bugzilla 1050.
756 TF/02 Bugzilla 139: Avoid using the += operator in the modular lookup
757 makefiles for portability to HP-UX and POSIX correctness.
759 PP/01 Permit LOOKUP_foo enabling on the make command-line.
760 Also via indented variable definition in the Makefile.
761 (Debugging by Oliver Heesakkers).
763 PP/02 Restore caching of spamd results with expanded spamd_address.
764 Patch from author of expandable spamd_address patch, Wolfgang Breyha.
766 PP/03 Build issue: lookups-Makefile now exports LC_ALL=C
767 Improves build reliability. Fix from: Frank Elsner
769 NM/02 Fix wide character breakage in the rfc2047 coding
770 Fixes bug 1064. Patch from Andrey N. Oktyabrski
772 NM/03 Allow underscore in dnslist lookups
773 Fixes bug 1026. Patch from Graeme Fowler
775 PP/04 Bugzilla 230: Support TLS-enabled LDAP (in addition to ldaps).
776 Code patches from Adam Ciarcinski of NetBSD.
778 NM/04 Fixed exiqgrep to cope with mailq missing size issue
781 PP/05 Bugzilla 1083: when lookup expansion defers, escape the output which
782 is logged, to avoid truncation. Patch from John Horne.
784 PP/06 Bugzilla 1042: implement freeze_signal on pipe transports.
785 Patch from Jakob Hirsch.
787 PP/07 Bugzilla 1061: restrict error messages sent over SMTP to not reveal
788 SQL string expansion failure details.
789 Patch from Andrey Oktyabrski.
791 PP/08 Bugzilla 486: implement %M datestamping in log filenames.
792 Patch from Simon Arlott.
794 PP/09 New lookups functionality failed to compile on old gcc which rejects
795 extern declarations in function scope.
796 Patch from Oliver Fleischmann
798 PP/10 Use sig_atomic_t for flags set from signal handlers.
799 Check getgroups() return and improve debugging.
800 Fixed developed for diagnosis in bug 927 (which turned out to be
803 PP/11 Bugzilla 1055: Update $message_linecount for maildir_tag.
804 Patch from Mark Zealey.
806 PP/12 Bugzilla 1056: Improved spamd server selection.
807 Patch from Mark Zealey.
809 PP/13 Bugzilla 1086: Deal with maildir quota file races.
810 Based on patch from Heiko Schlittermann.
812 PP/14 Bugzilla 1019: DKIM multiple signature generation fix.
813 Patch from Uwe Doering, sign-off by Michael Haardt.
815 NM/05 Fix to spam.c to accommodate older gcc versions which dislike
816 variable declaration deep within a block. Bug and patch from
819 PP/15 lookups-Makefile IRIX compatibilty coercion.
821 PP/16 Make DISABLE_DKIM build knob functional.
823 NM/06 Bugzilla 968: child_open_uid: restore default SIGPIPE handler
824 Patch by Simon Arlott
826 TF/03 Fix valgrind.h portability to C89 compilers that do not support
827 variable argument macros. Our copy now differs from upstream.
833 TF/01 Failure to get a lock on a hints database can have serious
834 consequences so log it to the panic log.
836 TF/02 Log LMTP confirmation messages in the same way as SMTP,
837 controlled using the smtp_confirmation log selector.
839 TF/03 Include the error message when we fail to unlink a spool file.
841 DW/01 Bugzilla 139: Support dynamically loaded lookups as modules.
842 With thanks to Steve Haslam, Johannes Berg & Serge Demonchaux
843 for maintaining out-of-tree patches for some time.
845 PP/01 Bugzilla 139: Documentation and portability issues.
846 Avoid GNU Makefile-isms, let Exim continue to build on BSD.
847 Handle per-OS dynamic-module compilation flags.
849 PP/02 Let /dev/null have normal permissions.
850 The 4.73 fixes were a little too stringent and complained about the
851 permissions on /dev/null. Exempt it from some checks.
852 Reported by Andreas M. Kirchwitz.
854 PP/03 Report version information for many libraries, including
855 Exim version information for dynamically loaded libraries. Created
856 version.h, now support a version extension string for distributors
857 who patch heavily. Dynamic module ABI change.
859 PP/04 CVE-2011-0017 - check return value of setuid/setgid. This is a
860 privilege escalation vulnerability whereby the Exim run-time user
861 can cause root to append content of the attacker's choosing to
864 PP/05 Bugzilla 1041: merged DCC maintainer's fixes for return code.
867 PP/06 Bugzilla 1071: fix delivery logging with untrusted macros.
868 If dropping privileges for untrusted macros, we disabled normal logging
869 on the basis that it would fail; for the Exim run-time user, this is not
870 the case, and it resulted in successful deliveries going unlogged.
871 Fixed. Reported by Andreas Metzler.
877 PP/01 Date: & Message-Id: revert to normally being appended to a message,
878 only prepend for the Resent-* case. Fixes regression introduced in
879 Exim 4.70 by NM/22 for Bugzilla 607.
881 PP/02 Include check_rfc2047_length in configure.default because we're seeing
882 increasing numbers of administrators be bitten by this.
884 JJ/01 Added DISABLE_DKIM and comment to src/EDITME
886 PP/03 Bugzilla 994: added openssl_options main configuration option.
888 PP/04 Bugzilla 995: provide better SSL diagnostics on failed reads.
890 PP/05 Bugzilla 834: provide a permit_coredump option for pipe transports.
892 PP/06 Adjust NTLM authentication to handle SASL Initial Response.
894 PP/07 If TLS negotiated an anonymous cipher, we could end up with SSL but
895 without a peer certificate, leading to a segfault because of an
896 assumption that peers always have certificates. Be a little more
897 paranoid. Problem reported by Martin Tscholak.
899 PP/08 Bugzilla 926: switch ClamAV to use the new zINSTREAM API for content
900 filtering; old API available if built with WITH_OLD_CLAMAV_STREAM=yes
901 NB: ClamAV planning to remove STREAM in "middle of 2010".
902 CL also introduces -bmalware, various -d+acl logging additions and
903 more caution in buffer sizes.
905 PP/09 Implemented reverse_ip expansion operator.
907 PP/10 Bugzilla 937: provide a "debug" ACL control.
909 PP/11 Bugzilla 922: Documentation dusting, patch provided by John Horne.
911 PP/12 Bugzilla 973: Implement --version.
913 PP/13 Bugzilla 752: Refuse to build/run if Exim user is root/0.
915 PP/14 Build without WITH_CONTENT_SCAN. Path from Andreas Metzler.
917 PP/15 Bugzilla 816: support multiple condition rules on Routers.
919 PP/16 Add bool_lax{} expansion operator and use that for combining multiple
920 condition rules, instead of bool{}. Make both bool{} and bool_lax{}
921 ignore trailing whitespace.
923 JJ/02 prevent non-panic DKIM error from being sent to paniclog
925 JJ/03 added tcp_wrappers_daemon_name to allow host entries other than
928 PP/17 Fix malware regression for cmdline scanner introduced in PP/08.
929 Notification from Dr Andrew Aitchison.
931 PP/18 Change ClamAV response parsing to be more robust and to handle ClamAV's
932 ExtendedDetectionInfo response format.
933 Notification from John Horne.
935 PP/19 OpenSSL 1.0.0a compatibility const-ness change, should be backwards
938 PP/20 Added a CONTRIBUTING file. Fixed the documentation build to use http:
939 XSL and documented dependency on system catalogs, with examples of how
942 DW/21 Added Valgrind hooks in store.c to help it capture out-of-bounds store
945 DW/22 Bugzilla 1044: CVE-2010-4345 - partial fix: restrict default behaviour
946 of CONFIGURE_OWNER and CONFIGURE_GROUP options to no longer allow a
947 configuration file which is writeable by the Exim user or group.
949 DW/23 Bugzilla 1044: CVE-2010-4345 - part two: extend checks for writeability
950 of configuration files to cover files specified with the -C option if
951 they are going to be used with root privileges, not just the default
954 DW/24 Bugzilla 1044: CVE-2010-4345 - part three: remove ALT_CONFIG_ROOT_ONLY
955 option (effectively making it always true).
957 DW/25 Add TRUSTED_CONFIG_PREFIX_FILE option to allow alternative configuration
958 files to be used while preserving root privileges.
960 DW/26 Set FD_CLOEXEC on SMTP sockets after forking in the daemon, to ensure
961 that rogue child processes cannot use them.
963 PP/27 Bugzilla 1047: change the default for system_filter_user to be the Exim
964 run-time user, instead of root.
966 PP/28 Add WHITELIST_D_MACROS option to let some macros be overridden by the
967 Exim run-time user without dropping privileges.
969 DW/29 Remove use of va_copy() which breaks pre-C99 systems. Duplicate the
970 result string, instead of calling string_vformat() twice with the same
973 DW/30 Allow TRUSTED_CONFIG_PREFIX_FILE only for Exim or CONFIGURE_OWNER, not
974 for other users. Others should always drop root privileges if they use
975 -C on the command line, even for a whitelisted configure file.
977 DW/31 Turn TRUSTED_CONFIG_PREFIX_FILE into TRUSTED_CONFIG_FILE. No prefixes.
979 NM/01 Fixed bug #1002 - Message loss when using multiple deliveries
985 JJ/01 installed exipick 20100104.1, adding $max_received_linelength,
986 $data_path, and $header_path variables; fixed documentation bugs and
989 JJ/02 installed exipick 20100222.0, added --input-dir and --finput to allow
990 exipick to access non-standard spools, including the "frozen" queue
993 NM/01 Bugzilla 965: Support mysql stored procedures.
994 Patch from Alain Williams
996 NM/02 Bugzilla 961: Spacing fix (syntax error) on Makefile directives for NetBSD
998 NM/03 Bugzilla 955: Documentation fix for max_rcpts.
999 Patch from Andreas Metzler
1001 NM/04 Bugzilla 954: Fix for unknown responses from Dovecot authenticator.
1002 Patch from Kirill Miazine
1004 NM/05 Bugzilla 671: Added umask to procmail example.
1006 JJ/03 installed exipick 20100323.0, fixing doc bug
1008 NM/06 Bugzilla 988: CVE-2010-2023 - prevent hardlink attack on sticky mail
1009 directory. Notification and patch from Dan Rosenberg.
1011 TK/01 PDKIM: Upgrade PolarSSL files to upstream version 0.12.1.
1013 TK/02 Improve log output when DKIM signing operation fails.
1015 MH/01 Treat the transport option dkim_domain as a colon separated
1016 list, not as a single string, and sign the message with each element,
1017 omitting multiple occurences of the same signer.
1019 NM/07 Null terminate DKIM strings, Null initialise DKIM variable
1020 Bugzilla 985, 986. Patch by Simon Arlott
1022 NM/08 Bugzilla 967. dnsdb DNS TXT record bug fix (DKIM-related)
1023 Patch by Simon Arlott
1025 PP/01 Bugzilla 989: CVE-2010-2024 - work round race condition on
1026 MBX locking. Notification from Dan Rosenberg.
1032 TK/01 Bugzilla 912: Fix DKIM segfault on empty headers/body.
1034 NM/01 Bugzilla 913: Documentation fix for gnutls_* options.
1036 NM/02 Bugzilla 722: Documentation for randint. Better randomness defaults.
1038 NM/03 Bugzilla 847: Enable DNSDB lookup by default.
1040 NM/04 Bugzilla 915: Flag broken perl installation during build.
1046 TK/01 Added patch by Johannes Berg that expands the main option
1047 "spamd_address" if it starts with a dollar sign.
1049 TK/02 Write list of recipients to X-Envelope-Sender header when building
1050 the mbox-format spool file for content scanning (suggested by Jakob
1053 TK/03 Added patch by Wolfgang Breyha that adds experimental DCC
1054 (http://www.dcc-servers.net/) support via dccifd. Activated by
1055 setting EXPERIMENTAL_DCC=yes in Local/Makefile.
1057 TK/04 Bugzilla 673: Add f-protd malware scanner support. Patch submitted
1058 by Mark Daniel Reidel <mr@df.eu>.
1060 NM/01 Bugzilla 657: Embedded PCRE removed from the exim source tree.
1061 When building exim an external PCRE library is now needed -
1062 PCRE is a system library on the majority of modern systems.
1063 See entry on PCRE_LIBS in EDITME file.
1065 NM/02 Bugzilla 646: Removed unwanted C/R in Dovecot authenticator
1066 conversation. Added nologin parameter to request.
1067 Patch contributed by Kirill Miazine.
1069 TF/01 Do not log submission mode rewrites if they do not change the address.
1071 TF/02 Bugzilla 662: Fix stack corruption before exec() in daemon.c.
1073 NM/03 Bugzilla 602: exicyclog now handles panic log, and creates empty
1074 log files in place. Contributed by Roberto Lima.
1076 NM/04 Bugzilla 667: Close socket used by dovecot authenticator.
1078 TF/03 Bugzilla 615: When checking the local_parts router precondition
1079 after a local_part_suffix or local_part_prefix option, Exim now
1080 does not use the address's named list lookup cache, since this
1081 contains cached lookups for the whole local part.
1083 NM/05 Bugzilla 521: Integrated SPF Best Guess support contributed by
1084 Robert Millan. Documentation is in experimental-spec.txt.
1086 TF/04 Bugzilla 668: Fix parallel build (make -j).
1088 NM/05.2 Bugzilla 437: Prevent Maildir aux files being created with mode 000.
1090 NM/05.3 Bugzilla 598: Improvement to Dovecot authenticator handling.
1091 Patch provided by Jan Srzednicki.
1093 TF/05 Leading white space used to be stripped from $spam_report which
1094 wrecked the formatting. Now it is preserved.
1096 TF/06 Save $spam_score, $spam_bar, and $spam_report in spool files, so
1097 that they are available at delivery time.
1099 TF/07 Fix the way ${extract is skipped in the untaken branch of a conditional.
1101 TF/08 TLS error reporting now respects the incoming_interface and
1102 incoming_port log selectors.
1104 TF/09 Produce a more useful error message if an SMTP transport's hosts
1105 setting expands to an empty string.
1107 NM/06 Bugzilla 744: EXPN did not work under TLS.
1108 Patch provided by Phil Pennock.
1110 NM/07 Bugzilla 769: Extraneous comma in usage fprintf
1111 Patch provided by Richard Godbee.
1113 NM/08 Fixed erroneous documentation references to smtp_notquit_acl to be
1114 acl_smtp_notquit, added index entry.
1116 NM/09 Bugzilla 787: Potential buffer overflow in string_format.
1117 Patch provided by Eugene Bujak.
1119 NM/10 Bugzilla 770: Problem on some platforms modifying the len parameter to
1120 accept(). Patch provided by Maxim Dounin.
1122 NM/11 Bugzilla 749: Preserve old behaviour of blanks comparing equal to zero.
1123 Patch provided by Phil Pennock.
1125 NM/12 Bugzilla 497: Correct behaviour of exiwhat when no config exists.
1127 NM/13 Bugzilla 590: Correct handling of Resent-Date headers.
1128 Patch provided by Brad "anomie" Jorsch.
1130 NM/14 Bugzilla 622: Added timeout setting to transport filter.
1131 Patch provided by Dean Brooks.
1133 TK/05 Add native DKIM support (does not depend on external libraries).
1135 NM/15 Bugzilla 854: Removed code that symlinks to pcre as its no longer useful.
1136 Patch provided by Graeme Fowler.
1138 NM/16 Bugzilla 851: Documentation example syntax fix.
1140 NM/17 Changed NOTICE file to remove references to embedded PCRE.
1142 NM/18 Bugzilla 894: Fix issue with very long lines including comments in
1145 NM/19 Bugzilla 745: TLS version reporting.
1146 Patch provided by Phil Pennock.
1148 NM/20 Bugzilla 167: bool: condition support.
1149 Patch provided by Phil Pennock.
1151 NM/21 Bugzilla 665: gnutls_compat_mode to allow compatibility with broken
1152 clients. Patch provided by Phil Pennock.
1154 NM/22 Bugzilla 607: prepend (not append) Resent-Message-ID and Resent-Date.
1155 Patch provided by Brad "anomie" Jorsch.
1157 NM/23 Bugzilla 687: Fix misparses in eximstats.
1158 Patch provided by Heiko Schlittermann.
1160 NM/24 Bugzilla 688: Fix exiwhat to handle log_selector = +pid.
1161 Patch provided by Heiko Schlittermann.
1163 NM/25 Bugzilla 727: Use transport mode as default mode for maildirsize file.
1164 plus update to original patch.
1166 NM/26 Bugzilla 799: Documentation correction for ratelimit.
1168 NM/27 Bugzilla 802: Improvements to local interface IP addr detection.
1169 Patch provided by David Brownlee.
1171 NM/28 Bugzilla 807: Improvements to LMTP delivery logging.
1173 NM/29 Bugzilla 862, 866, 875: Documentation bugfixes.
1175 NM/30 Bugzilla 888: TLS documentation bugfixes.
1177 NM/31 Bugzilla 896: Dovecot buffer overrun fix.
1179 NM/32 Bugzilla 889: Change all instances of "expr" in shell scripts to "expr --"
1180 Unlike the original bugzilla I have changed all shell scripts in src tree.
1182 NM/33 Bugzilla 898: Transport filter timeout fix.
1183 Patch by Todd Rinaldo.
1185 NM/34 Bugzilla 901: Fix sign/unsigned and UTF mismatches.
1186 Patch by Serge Demonchaux.
1188 NM/35 Bugzilla 39: Base64 decode bug fixes.
1189 Patch by Jakob Hirsch.
1191 NM/36 Bugzilla 909: Correct connect() call in dcc code.
1193 NM/37 Bugzilla 910: Correct issue with relaxed/simple handling.
1195 NM/38 Bugzilla 908: Removed NetBSD3 support as no longer needed.
1197 NM/39 Bugzilla 911: Fixed MakeLinks build script.
1203 TK/01 Add preliminary DKIM support. Currently requires a forked version of
1204 ALT-N's libdkim that I have put here:
1205 http://duncanthrax.net/exim-experimental/
1207 Note to Michael Haardt: I had to rename some vars in sieve.c. They
1208 were called 'true' and it seems that C99 defines that as a reserved
1209 keyword to be used with 'bool' variable types. That means you could
1210 not include C99-style headers which use bools without triggering
1211 build errors in sieve.c.
1213 NM/01 Bugzilla 592: --help option is handled incorrectly if exim is invoked
1214 as mailq or other aliases. Changed the --help handling significantly
1215 to do whats expected. exim_usage() emits usage/help information.
1217 SC/01 Added the -bylocaldomain option to eximstats.
1219 NM/02 Bugzilla 619: Defended against bad data coming back from gethostbyaddr.
1221 NM/03 Bugzilla 613: Documentation fix for acl_not_smtp.
1223 NM/04 Bugzilla 628: PCRE update to 7.4 (work done by John Hall).
1229 PH/01 Another patch from the Sieve maintainer.
1231 PH/02 When an IPv6 address is converted to a string for single-key lookup
1232 in an address list (e.g. for an item such as "net24-dbm;/net/works"),
1233 dots are used instead of colons so that keys in lsearch files need not
1234 contain colons. This was done some time before quoting was made available
1235 in lsearch files. However, iplsearch files do require colons in IPv6 keys
1236 (notated using the quote facility) so as to distinguish them from IPv4
1237 keys. This meant that lookups for IP addresses in host lists did not work
1238 for iplsearch lookups.
1240 This has been fixed by arranging for IPv6 addresses to be expressed with
1241 colons if the lookup type is iplsearch. This is not incompatible, because
1242 previously such lookups could never work.
1244 The situation is now rather anomolous, since one *can* have colons in
1245 ordinary lsearch keys. However, making the change in all cases is
1246 incompatible and would probably break a number of configurations.
1248 TK/01 Change PRVS address formatting scheme to reflect latests BATV draft
1251 MH/01 The "spam" ACL condition code contained a sscanf() call with a %s
1252 conversion specification without a maximum field width, thereby enabling
1253 a rogue spamd server to cause a buffer overflow. While nobody in their
1254 right mind would setup Exim to query an untrusted spamd server, an
1255 attacker that gains access to a server running spamd could potentially
1256 exploit this vulnerability to run arbitrary code as the Exim user.
1258 TK/02 Bugzilla 502: Apply patch to make the SPF-Received: header use
1259 $primary_hostname instead of what libspf2 thinks the hosts name is.
1261 MH/02 The dsearch lookup now uses lstat(2) instead of stat(2) to look for
1262 a directory entry by the name of the lookup key. Previously, if a
1263 symlink pointed to a non-existing file or a file in a directory that
1264 Exim lacked permissions to read, a lookup for a key matching that
1265 symlink would fail. Now it is enough that a matching directory entry
1266 exists, symlink or not. (Bugzilla 503.)
1268 PH/03 The body_linecount and body_zerocount variables are now exported in the
1271 PH/04 Added the $dnslist_matched variable.
1273 PH/05 Unset $tls_cipher and $tls_peerdn before making a connection as a client.
1274 This means they are set thereafter only if the connection becomes
1277 PH/06 Added the client_condition to authenticators so that some can be skipped
1278 by clients under certain conditions.
1280 PH/07 The error message for a badly-placed control=no_multiline_responses left
1281 "_responses" off the end of the name.
1283 PH/08 Added -Mvc to output a copy of a message in RFC 2822 format.
1285 PH/09 Tidied the code for creating ratelimiting keys, creating them explicitly
1286 (without spaces) instead of just copying the configuration text.
1288 PH/10 Added the /noupdate option to the ratelimit ACL condition.
1290 PH/11 Added $max_received_linelength.
1292 PH/12 Added +ignore_defer and +include_defer to host lists.
1294 PH/13 Installed PCRE version 7.2. This needed some changes because of the new
1295 way in which PCRE > 7.0 is built.
1297 PH/14 Implemented queue_only_load_latch.
1299 PH/15 Removed an incorrect (int) cast when reading the value of SIZE in a
1300 MAIL command. The effect was to mangle the value on 64-bit systems.
1302 PH/16 Another patch from the Sieve maintainer.
1304 PH/17 Added the NOTQUIT ACL, based on a patch from Ted Cooper.
1306 PH/18 If a system quota error occurred while trying to create the file for
1307 a maildir delivery, the message "Mailbox is full" was not appended to the
1308 bounce if the delivery eventually timed out. Change 4.67/27 below applied
1309 only to a quota excession during the actual writing of the file.
1311 PH/19 It seems that peer DN values may contain newlines (and other non-printing
1312 characters?) which causes problems in log lines. The DN values are now
1313 passed through string_printing() before being added to log lines.
1315 PH/20 Added the "servers=" facility to MySQL and PostgreSQL lookups. (Oracle
1316 and InterBase are left for another time.)
1318 PH/21 Added message_body_newlines option.
1320 PH/22 Guard against possible overflow in moan_check_errorcopy().
1322 PH/23 POSIX allows open() to be a macro; guard against that.
1324 PH/24 If the recipient of an error message contained an @ in the local part
1325 (suitably quoted, of course), incorrect values were put in $domain and
1326 $local_part during the evaluation of errors_copy.
1332 MH/01 Fix for bug #448, segfault in Dovecot authenticator when interface_address
1333 is unset (happens when testing with -bh and -oMi isn't used). Thanks to
1336 PH/01 Added a new log selector smtp_no_mail, to log SMTP sessions that do not
1337 issue a MAIL command.
1339 PH/02 In an ACL statement such as
1341 deny dnslists = X!=127.0.0.2 : X=127.0.0.2
1343 if a client was not listed at all, or was listed with a value other than
1344 127.0.0.2, in the X list, but was listed with 127.0.0.2 in the Y list,
1345 the condition was not true (as it should be), so access was not denied.
1346 The bug was that the ! inversion was incorrectly passed on to the second
1347 item. This has been fixed.
1349 PH/03 Added additional dnslists conditions == and =& which are different from
1350 = and & when the dns lookup returns more than one IP address.
1352 PH/04 Added gnutls_require_{kx,mac,protocols} to give more control over the
1353 cipher suites used by GnuTLS. These options are ignored by OpenSSL.
1355 PH/05 After discussion on the list, added a compile time option ENABLE_DISABLE_
1356 FSYNC, which compiles an option called disable_fsync that allows for
1357 bypassing fsync(). The documentation is heavily laced with warnings.
1359 SC/01 Updated eximstats to collate all SpamAssassin rejects into one bucket.
1361 PH/06 Some tidies to the infrastructure of the Test Suite that is concerned
1362 with the auxiliary C programs that it uses: (1) Arrange for BIND_8_COMPAT
1363 to be defined when compiling on OSX (Darwin); (2) Tidies to the Makefile,
1364 including adding "make clean"; (3) Added -fPIC when compiling the test
1365 dynamically loaded module, to get rid of a warning.
1367 MH/02 Fix for bug #451, causing paniclog entries to be written if a bounce
1368 message fails, move_frozen_messages = true and ignore_bounce_errors_after
1369 = 0s. The bug is otherwise harmless.
1371 PH/07 There was a bug in the dovecot authenticator such that the value of
1372 $auth1 could be overwritten, and so not correctly preserved, after a
1373 successful authentication. This usually meant that the value preserved by
1374 the server_setid option was incorrect.
1376 PH/08 Added $smtp_count_at_connection_start, deliberately with a long name.
1378 PH/09 Installed PCRE release 7.0.
1380 PH/10 The acl_not_smtp_start ACL was, contrary to the documentation, not being
1381 run for batched SMTP input. It is now run at the start of every message
1382 in the batch. While fixing this I discovered that the process information
1383 (output by running exiwhat) was not always getting set for -bs and -bS
1384 input. This is fixed, and it now also says "batched" for BSMTP.
1386 PH/11 Added control=no_pipelining.
1388 PH/12 Added $sending_ip_address and $sending_port (mostly Magnus Holmgren's
1389 patch, slightly modified), and move the expansion of helo_data till after
1390 the connection is made in the smtp transport (so it can use these
1393 PH/13 Added ${rfc2047d: to decoded RFC 2047 strings.
1395 PH/14 Added log_selector = +pid.
1397 PH/15 Flush SMTP output before delaying, unless control=no_delay_flush is set.
1399 PH/16 Add ${if forany and ${if forall.
1401 PH/17 Added dsn_from option to vary the From: line in DSNs.
1403 PH/18 Flush SMTP output before performing a callout, unless control =
1404 no_callout_flush is set.
1406 PH/19 Change 4.64/PH/36 introduced a bug: when address_retry_include_sender
1407 was true (the default) a successful delivery failed to delete the retry
1408 item, thus causing premature timeout of the address. The bug is now
1411 PH/20 Added hosts_avoid_pipelining to the smtp transport.
1413 PH/21 Long custom messages for fakedefer and fakereject are now split up
1414 into multiline reponses in the same way that messages for "deny" and
1415 other ACL rejections are.
1417 PH/22 Applied Jori Hamalainen's speed-up changes and typo fixes to exigrep,
1418 with slight modification.
1420 PH/23 Applied sieve patches from the maintainer "tracking the latest notify
1421 draft, changing the syntax and factoring some duplicate code".
1423 PH/24 When the log selector "outgoing_port" was set, the port was shown as -1
1424 for deliveries of the second and subsequent messages over the same SMTP
1427 PH/25 Applied Magnus Holmgren's patch for ${addresses, ${map, ${filter, and
1428 ${reduce, with only minor "tidies".
1430 SC/02 Applied Daniel Tiefnig's patch to improve the '($parent) =' pattern match.
1432 PH/26 Added a "continue" ACL modifier that does nothing, for the benefit of its
1433 expansion side effects.
1435 PH/27 When a message times out after an over-quota error from an Exim-imposed
1436 quota, the bounce message says "mailbox is full". This message was not
1437 being given when it was a system quota that was exceeded. It now should
1440 MH/03 Made $recipients available in local_scan(). local_scan() already has
1441 better access to the recipient list through recipients_list[], but
1442 $recipients can be useful in postmaster-provided expansion strings.
1444 PH/28 The $smtp_command and $smtp_command_argument variables were not correct
1445 in the case of a MAIL command with additional options following the
1446 address, for example: MAIL FROM:<foo@bar> SIZE=1234. The option settings
1447 were accidentally chopped off.
1449 PH/29 SMTP synchronization checks are implemented when a command is read -
1450 there is a check that no more input is waiting when there shouldn't be
1451 any. However, for some commands, a delay in an ACL can mean that it is
1452 some time before the response is written. In this time, more input might
1453 arrive, invalidly. So now there are extra checks after an ACL has run for
1454 HELO/EHLO and after the predata ACL, and likewise for MAIL and RCPT when
1455 pipelining has not been advertised.
1457 PH/30 MH's patch to allow iscntrl() characters to be list separators.
1459 PH/31 Unlike :fail:, a custom message specified with :defer: was not being
1460 returned in the SMTP response when smtp_return_error_details was false.
1461 This has been fixed.
1463 PH/32 Change the Dovecot authenticator to use read() and write() on the socket
1464 instead of the C I/O that was originally supplied, because problems were
1465 reported on Solaris.
1467 PH/33 Compile failed with OpenSSL 0.9.8e. This was due to a coding error in
1468 Exim which did not show up earlier: it was assuming that a call to
1469 SSL_CTX_set_info_callback() might give an error value. In fact, there is
1470 no error. In previous releases of OpenSSL, SSL_CTX_set_info_callback()
1471 was a macro that became an assignment, so it seemed to work. This has
1472 changed to a proper function call with a void return, hence the compile
1473 error. Exim's code has been fixed.
1475 PH/34 Change HDA_SIZE in oracle.c from 256 to 512. This is needed for 64-bit
1478 PH/35 Applied a patch from the Sieve maintainer which fixes a bug in "notify".
1480 PH/36 Applied John Jetmore's patch to add -v functionality to exigrep.
1482 PH/37 If a message is not accepted after it has had an id assigned (e.g.
1483 because it turns out to be too big or there is a timeout) there is no
1484 "Completed" line in the log. When some messages of this type were
1485 selected by exigrep, they were listed as "not completed". Others were
1486 picked up by some special patterns. I have improved the selection
1487 criteria to be more general.
1489 PH/38 The host_find_failed option in the manualroute router can now be set
1490 to "ignore", to completely ignore a host whose IP address cannot be
1491 found. If all hosts are ignored, the behaviour is controlled by the new
1492 host_all_ignored option.
1494 PH/39 In a list of hosts for manualroute, if one item (either because of multi-
1495 homing or because of multiple MX records with /mx) generated more than
1496 one IP address, and the following item turned out to be the local host,
1497 all the secondary addresses of the first item were incorrectly removed
1498 from the list, along with the local host and any following hosts (which
1499 is what is supposed to happen).
1501 PH/40 When Exim receives a message, it writes the login name, uid, and gid of
1502 whoever called Exim into the -H file. In the case of the daemon it was
1503 behaving confusingly. When first started, it used values for whoever
1504 started the daemon, but after a SIGHUP it used the Exim user (because it
1505 calls itself on a restart). I have changed the code so that it now always
1508 PH/41 (Following a suggestion from Tony Finch) If all the RCPT commands in a
1509 message are rejected with the same error (e.g. no authentication or bad
1510 sender address), and a DATA command is nevertheless sent (as can happen
1511 with PIPELINING or a stupid MUA), the error message that was given to the
1512 RCPT commands is included in the rejection of the DATA command. This is
1513 intended to be helpful for MUAs that show only the final error to their
1516 PH/42 Another patch from the Sieve maintainer.
1518 SC/02 Eximstats - Differentiate between permanent and temporary rejects.
1519 Eximstats - Fixed some broken HTML links and added missing column headers
1521 Eximstats - Fixed Grand Total Summary Domains, Edomains, and Email
1522 columns for Rejects, Temp Rejects, Ham, and Spam rows.
1524 SC/03 Eximstats - V1.58 Fix to get <> and blackhole to show in edomain tables.
1526 PH/43 Yet another patch from the Sieve maintainer.
1528 PH/44 I found a way to check for a TCP/IP connection going away before sending
1529 the response to the final '.' that terminates a message, but only in the
1530 case where the client has not sent further data following the '.'
1531 (unfortunately, this is allowed). However, in many cases there won't be
1532 any further data because there won't be any more messages to send. A call
1533 to select() can be used: if it shows that the input is "ready", there is
1534 either input waiting, or the socket has been closed. An attempt to read
1535 the next input character can distinguish the two cases. Previously, Exim
1536 would have sent an OK response which the client would never have see.
1537 This could lead to message repetition. This fix should cure that, at
1538 least in a lot of common cases.
1540 PH/45 Do not advertise STARTTLS in response to HELP unless it would be
1541 advertised in response to EHLO.
1547 PH/01 Two more bugs that were introduced by 4.64/PH/07, in addition to the one
1548 fixed by 4.65/MH/01 (is this a record?) are fixed:
1550 (i) An empty string was always treated as zero by the numeric comparison
1551 operators. This behaviour has been restored.
1553 (ii) It is documented that the numeric comparison operators always treat
1554 their arguments as decimal numbers. This was broken in that numbers
1555 starting with 0 were being interpreted as octal.
1557 While fixing these problems I realized that there was another issue that
1558 hadn't been noticed. Values of message_size_limit (both the global option
1559 and the transport option) were treated as octal if they started with 0.
1560 The documentation was vague. These values are now always treated as
1561 decimal, and I will make that clear in the documentation.
1567 TK/01 Disable default definition of HAVE_LINUX_SENDFILE. Clashes with
1568 Linux large file support (_FILE_OFFSET_BITS=64) on older glibc
1571 MH/01 Don't check that the operands of numeric comparison operators are
1572 integers when their expansion is in "skipping" mode (fixes bug
1573 introduced by 4.64-PH/07).
1575 PH/01 If a system filter or a router generates more than SHRT_MAX (32767)
1576 child addresses, Exim now panics and dies. Previously, because the count
1577 is held in a short int, deliveries were likely to be lost. As such a
1578 large number of recipients for a single message is ridiculous
1579 (performance will be very, very poor), I have chosen to impose a limit
1580 rather than extend the field.
1586 TK/01 Bugzilla #401. Fix DK spooling code so that it can overwrite a
1587 leftover -K file (the existence of which was triggered by #402).
1588 While we were at it, introduced process PID as part of the -K
1589 filename. This should rule out race conditions when creating
1592 TK/02 Bugzilla #402. Apply patch from Simon Arlott, speeding up DK signing
1593 processing considerably. Previous code took too long for large mails,
1594 triggering a timeout which in turn triggers #401.
1596 TK/03 Introduced HAVE_LINUX_SENDFILE to os.h-Linux. Currently only used
1597 in the DK code in transports.c. sendfile() is not really portable,
1598 hence the _LINUX specificness.
1600 TF/01 In the add_headers option to the mail command in an Exim filter,
1601 there was a bug that Exim would claim a syntax error in any
1602 header after the first one which had an odd number of characters
1605 PH/01 If a server that rejects MAIL FROM:<> was the target of a sender
1606 callout verification, Exim cached a "reject" for the entire domain. This
1607 is correct for most verifications, but it is not correct for a recipient
1608 verification with use_sender or use_postmaster set, because in that case
1609 the callout does not use MAIL FROM:<>. Exim now distinguishes the special
1610 case of MAIL FROM:<> rejection from other early rejections (e.g.
1611 rejection of HELO). When verifying a recipient using a non-null MAIL
1612 address, the cache is ignored if it shows MAIL FROM:<> rejection.
1613 Whatever the result of the callout, the value of the domain cache is
1614 left unchanged (for any other kind of callout, getting as far as trying
1615 RCPT means that the domain itself is ok).
1617 PH/02 Tidied a number of unused variable and signed/unsigned warnings that
1620 PH/03 On Solaris, an unexpectedly close socket (dropped connection) can
1621 manifest itself as EPIPE rather than ECONNECT. When tidying away a
1622 session, the daemon ignores ECONNECT errors and logs others; it now
1623 ignores EPIPE as well.
1625 PH/04 Applied Nico Erfurth's refactoring patch to tidy up mime.c
1626 (quoted-printable decoding).
1628 PH/05 Applied Nico Erfurth's refactoring patch to tidy up spool_mbox.c, and
1629 later the small subsequent patch to fix an introduced bug.
1631 PH/06 Installed the latest Cygwin Makefile from the Cygwin maintainer.
1633 PH/07 There was no check for overflow in expansions such as ${if >{1}{4096M}}.
1635 PH/08 An error is now given if message_size_limit is specified negative.
1637 PH/09 Applied and tidied up Jakob Hirsch's patch for allowing ACL variables
1638 to be given (somewhat) arbitrary names.
1640 JJ/01 exipick 20060919.0, allow for arbitrary acl_ variables introduced
1643 JJ/02 exipick 20060919.0, --show-vars args can now be regular expressions,
1644 miscellaneous code fixes
1646 PH/10 Added the log_reject_target ACL modifier to specify where to log
1649 PH/11 Callouts were setting the name used for EHLO/HELO from $smtp_active_
1650 hostname. This is wrong, because it relates to the incoming message (and
1651 probably the interface on which it is arriving) and not to the outgoing
1652 callout (which could be using a different interface). This has been
1653 changed to use the value of the helo_data option from the smtp transport
1654 instead - this is what is used when a message is actually being sent. If
1655 there is no remote transport (possible with a router that sets up host
1656 addresses), $smtp_active_hostname is used.
1658 PH/12 Installed Andrey Panin's patch to add a dovecot authenticator. Various
1659 tweaks were necessary in order to get it to work (see also 21 below):
1660 (a) The code assumed that strncpy() returns a negative number on buffer
1661 overflow, which isn't the case. Replaced with Exim's string_format()
1663 (b) There were several signed/unsigned issues. I just did the minimum
1664 hacking in of casts. There is scope for a larger refactoring.
1665 (c) The code used strcasecmp() which is not a standard C function.
1666 Replaced with Exim's strcmpic() function.
1667 (d) The code set only $1; it now sets $auth1 as well.
1668 (e) A simple test gave the error "authentication client didn't specify
1669 service in request". It would seem that Dovecot has changed its
1670 interface. Fortunately there's a specification; I followed it and
1671 changed what the client sends and it appears to be working now.
1673 PH/13 Added $message_headers_raw to provide the headers without RFC 2047
1676 PH/14 Corrected misleading output from -bv when -v was also used. Suppose the
1677 address A is aliased to B and C, where B exists and C does not. Without
1678 -v the output is "A verified" because verification stops after a
1679 successful redirection if more than one address is generated. However,
1680 with -v the child addresses are also verified. Exim was outputting "A
1681 failed to verify" and then showing the successful verification for C,
1682 with its parentage. It now outputs "B failed to verify", showing B's
1683 parentage before showing the successful verification of C.
1685 PH/15 Applied Michael Deutschmann's patch to allow DNS black list processing to
1686 look up a TXT record in a specific list after matching in a combined
1689 PH/16 It seems that the options setting for the resolver (RES_DEFNAMES and
1690 RES_DNSRCH) can affect the behaviour of gethostbyname() and friends when
1691 they consult the DNS. I had assumed they would set it the way they
1692 wanted; and indeed my experiments on Linux seem to show that in some
1693 cases they do (I could influence IPv6 lookups but not IPv4 lookups).
1694 To be on the safe side, however, I have now made the interface to
1695 host_find_byname() similar to host_find_bydns(), with an argument
1696 containing the DNS resolver options. The host_find_byname() function now
1697 sets these options at its start, just as host_find_bydns() does. The smtp
1698 transport options dns_qualify_single and dns_search_parents are passed to
1699 host_find_byname() when gethostbyname=TRUE in this transport. Other uses
1700 of host_find_byname() use the default settings of RES_DEFNAMES
1701 (qualify_single) but not RES_DNSRCH (search_parents).
1703 PH/17 Applied (a modified version of) Nico Erfurth's patch to make
1704 spool_read_header() do less string testing, by means of a preliminary
1705 switch on the second character of optional "-foo" lines. (This is
1706 overdue, caused by the large number of possibilities that now exist.
1707 Originally there were few.) While I was there, I also converted the
1708 str(n)cmp tests so they don't re-test the leading "-" and the first
1709 character, in the hope this might squeeze out yet more improvement.
1711 PH/18 Two problems with "group" syntax in header lines when verifying: (1) The
1712 flag allowing group syntax was set by the header_syntax check but not
1713 turned off, possible causing trouble later; (2) The flag was not being
1714 set at all for the header_verify test, causing "group"-style headers to
1715 be rejected. I have now set it in this case, and also caused header_
1716 verify to ignore an empty address taken from a group. While doing this, I
1717 came across some other cases where the code for allowing group syntax
1718 while scanning a header line wasn't quite right (mostly, not resetting
1719 the flag correctly in the right place). These bugs could have caused
1720 trouble for malformed header lines. I hope it is now all correct.
1722 PH/19 The functions {pwcheck,saslauthd}_verify_password() are always called
1723 with the "reply" argument non-NULL. The code, however (which originally
1724 came from elsewhere) had *some* tests for NULL when it wrote to *reply,
1725 but it didn't always do it. This confused somebody who was copying the
1726 code for some other use. I have removed all the tests.
1728 PH/20 It was discovered that the GnuTLS code had support for RSA_EXPORT, a
1729 feature that was used to support insecure browsers during the U.S. crypto
1730 embargo. It requires special client support, and Exim is probably the
1731 only MTA that supported it -- and would never use it because real RSA is
1732 always available. This code has been removed, because it had the bad
1733 effect of slowing Exim down by computing (never used) parameters for the
1734 RSA_EXPORT functionality.
1736 PH/21 On the advice of Timo Sirainen, added a check to the dovecot
1737 authenticator to fail if there's a tab character in the incoming data
1738 (there should never be unless someone is messing about, as it's supposed
1739 to be base64-encoded). Also added, on Timo's advice, the "secured" option
1740 if the connection is using TLS or if the remote IP is the same as the
1741 local IP, and the "valid-client-cert option" if a client certificate has
1744 PH/22 As suggested by Dennis Davis, added a server_condition option to *all*
1745 authenticators. This can be used for authorization after authentication
1746 succeeds. (In the case of plaintext, it servers for both authentication
1749 PH/23 Testing for tls_required and lost_connection in a retry rule didn't work
1750 if any retry times were supplied.
1752 PH/24 Exim crashed if verify=helo was activated during an incoming -bs
1753 connection, where there is no client IP address to check. In this
1754 situation, the verify now always succeeds.
1756 PH/25 Applied John Jetmore's -Mset patch.
1758 PH/26 Added -bem to be like -Mset, but loading a message from a file.
1760 PH/27 In a string expansion for a processed (not raw) header when multiple
1761 headers of the same name were present, leading whitespace was being
1762 removed from all of them, but trailing whitespace was being removed only
1763 from the last one. Now trailing whitespace is removed from each header
1764 before concatenation. Completely empty headers in a concatenation (as
1765 before) are ignored.
1767 PH/28 Fixed bug in backwards-compatibility feature of PH/09 (thanks to John
1768 Jetmore). It would have mis-read ACL variables from pre-4.61 spool files.
1770 PH/29 [Removed. This was a change that I later backed out, and forgot to
1771 correct the ChangeLog entry (that I had efficiently created) before
1772 committing the later change.]
1774 PH/30 Exim was sometimes attempting to deliver messages that had suffered
1775 address errors (4xx response to RCPT) over the same connection as other
1776 messages routed to the same hosts. Such deliveries are always "forced",
1777 so retry times are not inspected. This resulted in far too many retries
1778 for the affected addresses. The effect occurred only when there were more
1779 hosts than the hosts_max_try setting in the smtp transport when it had
1780 the 4xx errors. Those hosts that it had tried were not added to the list
1781 of hosts for which the message was waiting, so if all were tried, there
1782 was no problem. Two fixes have been applied:
1784 (i) If there are any address or message errors in an SMTP delivery, none
1785 of the hosts (tried or untried) are now added to the list of hosts
1786 for which the message is waiting, so the message should not be a
1787 candidate for sending over the same connection that was used for a
1788 successful delivery of some other message. This seems entirely
1789 reasonable: after all the message is NOT "waiting for some host".
1790 This is so "obvious" that I'm not sure why it wasn't done
1791 previously. Hope I haven't missed anything, but it can't do any
1792 harm, as the worst effect is to miss an optimization.
1794 (ii) If, despite (i), such a delivery is accidentally attempted, the
1795 routing retry time is respected, so at least it doesn't keep
1796 hammering the server.
1798 PH/31 Installed Andrew Findlay's patch to close the writing end of the socket
1799 in ${readsocket because some servers need this prod.
1801 PH/32 Added some extra debug output when updating a wait-xxx database.
1803 PH/33 The hint "could be header name not terminated by colon", which has been
1804 given for certain expansion errors for a long time, was not being given
1805 for the ${if def:h_colon_omitted{... case.
1807 PH/34 The spec says: "With one important exception, whenever a domain list is
1808 being scanned, $domain contains the subject domain." There was at least
1809 one case where this was not true.
1811 PH/35 The error "getsockname() failed: connection reset by peer" was being
1812 written to the panic log as well as the main log, but it isn't really
1813 panic-worthy as it just means the connection died rather early on. I have
1814 removed the panic log writing for the ECONNRESET error when getsockname()
1817 PH/36 After a 4xx response to a RCPT error, that address was delayed (in queue
1818 runs only) independently of the message's sender address. This meant
1819 that, if the 4xx error was in fact related to the sender, a different
1820 message to the same recipient with a different sender could confuse
1821 things. In particualar, this can happen when sending to a greylisting
1822 server, but other circumstances could also provoke similar problems.
1823 I have changed the default so that the retry time for these errors is now
1824 based a combination of the sender and recipient addresses. This change
1825 can be overridden by setting address_retry_include_sender=false in the
1828 PH/37 For LMTP over TCP/IP (the smtp transport), error responses from the
1829 remote server are returned as part of bounce messages. This was not
1830 happening for LMTP over a pipe (the lmtp transport), but now it is the
1831 same for both kinds of LMTP.
1833 PH/38 Despite being documented as not happening, Exim was rewriting addresses
1834 in header lines that were in fact CNAMEs. This is no longer the case.
1836 PH/39 If -R or -S was given with -q<time>, the effect of -R or -S was ignored,
1837 and queue runs started by the daemon processed all messages. This has
1838 been fixed so that -R and -S can now usefully be given with -q<time>.
1840 PH/40 Import PCRE release 6.7 (fixes some bugs).
1842 PH/41 Add bitwise logical operations to eval (courtesy Brad Jorsch).
1844 PH/42 Give an error if -q is specified more than once.
1846 PH/43 Renamed the variables $interface_address and $interface_port as
1847 $received_ip_address and $received_port, to make it clear that these
1848 values apply to message reception, and not to the outgoing interface when
1849 a message is delivered. (The old names remain recognized, of course.)
1851 PH/44 There was no timeout on the connect() call when using a Unix domain
1852 socket in the ${readsocket expansion. There now is.
1854 PH/45 Applied a modified version of Brad Jorsch's patch to allow "message" to
1855 be meaningful with "accept".
1857 SC/01 Eximstats V1.43
1858 Bug fix for V1.42 with -h0 specified. Spotted by Chris Lear.
1860 SC/02 Eximstats V1.44
1861 Use a glob alias rather than an array ref in the generated
1862 parser. This improves both readability and performance.
1864 SC/03 Eximstats V1.45 (Marco Gaiarin / Steve Campbell)
1865 Collect SpamAssassin and rejection statistics.
1866 Don't display local sender or destination tables unless
1867 there is data to show.
1868 Added average volumes into the top table text output.
1870 SC/04 Eximstats V1.46
1871 Collect data on the number of addresses (recipients)
1872 as well as the number of messages.
1874 SC/05 Eximstats V1.47
1875 Added 'Message too big' to the list of mail rejection
1876 reasons (thanks to Marco Gaiarin).
1878 SC/06 Eximstats V1.48
1879 Mainlog lines which have GMT offsets and are too short to
1880 have a flag are now skipped.
1882 SC/07 Eximstats V1.49 (Alain Williams)
1883 Added the -emptyok flag.
1885 SC/08 Eximstats V1.50
1886 Fixes for obtaining the IP address from reject messages.
1888 JJ/03 exipick.20061117.2, made header handling as similar to exim as possible
1889 (added [br]h_ prefixes, implemented RFC2047 decoding. Fixed
1890 whitesspace changes from 4.64-PH/27
1892 JJ/04 exipick.20061117.2, fixed format and added $message_headers_raw to
1895 JJ/05 exipick.20061117.2, bug fixes (error out sooner when invalid criteria
1896 are found, allow negative numbers in numeric criteria)
1898 JJ/06 exipick.20061117.2, added new $message_body_missing variable
1900 JJ/07 exipick.20061117.2, added $received_ip_address and $received_port
1901 to match changes made in 4.64-PH/43
1903 PH/46 Applied Jori Hamalainen's patch to add features to exiqsumm.
1905 PH/47 Put in an explicit test for a DNS lookup of an address record where the
1906 "domain" is actually an IP address, and force a failure. This locks out
1907 those revolvers/nameservers that support "A-for-A" lookups, in
1908 contravention of the specifications.
1910 PH/48 When a host name was looked up from an IP address, and the subsequent
1911 forward lookup of the name timed out, the host name was left in
1912 $sender_host_name, contrary to the specification.
1914 PH/49 Although default lookup types such as lsearch* or cdb*@ have always been
1915 restricted to single-key lookups, Exim was not diagnosing an error if
1916 * or *@ was used with a query-style lookup.
1918 PH/50 Increased the value of DH_BITS in tls-gnu.c from 768 to 1024.
1920 MH/01 local_scan ABI version incremented to 1.1. It should have been updated
1921 long ago, but noone interested enough thought of it. Let's just say that
1922 the "1.1" means that there are some new functions that weren't there at
1923 some point in the past.
1925 PH/51 Error processing for expansion failure of helo_data from an smtp
1926 transport during callout processing was broken.
1928 PH/52 Applied John Jetmore's patch to allow tls-on-connect and STARTTLS to be
1929 tested/used via the -bh/-bhc/-bs options.
1931 PH/53 Added missing "#include <time.h>" to pcre/pcretest.c (this was a PCRE
1932 bug, fixed in subsequent PCRE releases).
1934 PH/54 Applied Robert Bannocks' patch to avoid a problem with references that
1935 arises when using the Solaris LDAP libraries (but not with OpenLDAP).
1937 PH/55 Check for a ridiculously long file name in exim_dbmbuild.
1943 SC/01 Use a glob alias rather than an array ref in eximstats generated
1944 parser. This improves both readability and performance.
1946 SC/02 Collect SpamAssassin and rejection statistics in eximstats.
1947 Don't display local sender or destination tables in eximstats unless
1948 there is data to show.
1949 Added average volumes into the eximstats top table text output.
1951 SC/03 Collect data on the number of addresses (recipients) as well
1952 as the number of messages in eximstats.
1954 TF/01 Correct an error in the documentation for the redirect router. Exim
1955 does (usually) call initgroups() when daemonizing.
1957 TF/02 Call initgroups() when dropping privilege in exim.c, so that Exim runs
1958 with consistent privilege compared to when running as a daemon.
1960 TF/03 Note in the spec that $authenticated_id is not set for local
1961 submissions from trusted users.
1963 TF/04 The ratelimit per_rcpt option now works correctly in acl_not_smtp.
1964 Thanks to Dean Brooks <dean@iglou.com> for the patch.
1966 TF/05 Make it easier to get SMTP authentication and TLS/SSL support working
1967 by adding some example configuration directives to the default
1968 configuration file. A little bit of work is required to uncomment the
1969 directives and define how usernames and passwords are checked, but
1970 there is now a framework to start from.
1972 PH/01 Added #define LDAP_DEPRECATED 1 to ldap.c because some of the "old"
1973 functions that Exim currently uses aren't defined in ldap.h for OpenLDAP
1974 without this. I don't know how relevant this is to other LDAP libraries.
1976 PH/02 Add the verb name to the "unknown ACL verb" error.
1978 PH/03 Magnus Holmgren's patch for filter_prepend_home.
1980 PH/03 Fixed Bugzilla #101: macro definition between ACLs doesn't work.
1982 PH/04 Applied Magnus Holmgren's patch to fix Bugzilla #98: transport's home
1983 directory not expanded when it should be if an expanded home directory
1984 was set for the address (which is overridden by the transport).
1986 PH/05 Applied Alex Kiernan's patch to fix Bugzilla #99: a problem with
1989 PH/06 Added acl_not_smtp_start, based on Johannes Berg's patch, and set the
1990 bit to forbid control=suppress_local_fixups in the acl_not_smtp ACL,
1991 because it is too late at that time, and has no effect.
1993 PH/07 Changed ${quote_pgsql to quote ' as '' instead of \' because of a
1994 security issue with \' (bugzilla #107). I could not use the
1995 PQescapeStringConn() function, because it needs a PGconn value as one of
1998 PH/08 When testing addresses using -bt, indicate those final addresses that
1999 are duplicates that would not cause an additional delivery. At least one
2000 person was confused, thinking that -bt output corresponded to deliveries.
2001 (Suppressing duplicates isn't a good idea as you lose the information
2002 about possibly different redirections that led to the duplicates.)
2004 PH/09 Applied patch from Erik to use select() instead of poll() in spam.c on
2005 systems where poll() doesn't work, in particular OS X.
2007 PH/10 Added more information to debugging output for retry time not reached.
2009 PH/11 Applied patch from Arkadiusz Miskiewicz to apply a timeout to read
2010 operations in malware.c.
2012 PH/12 Applied patch from Magnus Holmgren to include the "h" tag in Domain Keys
2015 PH/13 If write_rejectlog was set false when logging was sent to syslog with
2016 syslog_duplication set false, log lines that would normally be written
2017 both the the main log and to the reject log were not written to syslog at
2020 PH/14 In the default configuration, change the use of "message" in ACL warn
2021 statements to "add_header".
2023 PH/15 Diagnose a filter syntax error for "seen", "unseen", or "noerror" if not
2024 not followed by a command (e.g. "seen endif").
2026 PH/16 Recognize SMTP codes at the start of "message" in ACLs and after :fail:
2027 and :defer: in a redirect router. Add forbid_smtp_code to suppress the
2030 PH/17 Added extra conditions to the default value of delay_warning_condition
2034 { !eq{$h_list-id:$h_list-post:$h_list-subscribe:}{} } \
2035 { match{$h_precedence:}{(?i)bulk|list|junk} } \
2036 { match{$h_auto-submitted:}{(?i)auto-generated|auto-replied} } \
2039 The Auto-Submitted: and various List- headers are standardised, whereas I
2040 don't think Precedence: ever was.
2042 PH/18 Refactored debugging code in route_finduser() to show more information,
2043 in particular, the error code if getpwnam() issues one.
2045 PH/19 Added PQsetClientEncoding(conn, "SQL_ASCII") to the pgsql code module.
2046 This is apparently needed in addition to the PH/07 change above to avoid
2047 any possible encoding problems.
2049 PH/20 Perl can change the locale. Exim was resetting it after a ${perl call,
2050 but not after initializing Perl.
2052 PH/21 Added a call to PQsetNoticeProcessor() to catch pgsql "notices" and
2053 output them only if debugging. By default they are written stderr,
2054 apparently, which is not desirable.
2056 PH/22 Added Alain Williams' LDAP patch to support setting REFERRALS=off on
2059 JJ/01 exipick: added --reverse (and -R synonym), --random, --size, --sort and
2062 JJ/02 exipick: rewrote --help documentation to hopefully make more clear.
2064 PH/23 Made -oMaa and -oMt work with -bh and -bs to pretend the connection is
2065 authenticated or an ident call has been made. Suppress the default
2066 values for $authenticated_id and $authenticated_sender (but permit -oMai
2067 and -oMas) when testing with -bh.
2069 PH/24 Re-jigged the order of the tests in the default configuration so that the
2070 tests for valid domains and recipients precede the DNS black list and CSA
2071 tests, on the grounds that those ones are more expensive.
2073 PH/25 Exim was not testing for a space following SMTP commands such as EHLO
2074 that require one. Thus, EHLORHUBARB was interpreted as a valid command.
2075 This bug exists in every version of Exim that I still have, right back to
2078 PH/26 (n)wildlsearch lookups are documented as being done case-insensitively.
2079 However, an attempt to turn on case-sensitivity in a regex key by
2080 including (?-i) didn't work because the subject string was already
2081 lowercased, and the effects were non-intuitive. It turns out that a
2082 one-line patch can be used to allow (?-i) to work as expected.
2088 TF/01 Fix the add_header change below (4.61 PH/55) which had a bug that (amongst
2089 other effects) broke the use of negated acl sub-conditions.
2091 PH/01 ${readsocket now supports Internet domain sockets (modified John Jetmore
2094 PH/02 When tcp-wrappers is called from Exim, it returns only "deny" or "allow".
2095 "Deny" causes Exim to reject the incoming connection with a 554 error.
2096 Unfortunately, if there is a major crisis, such as a disk failure,
2097 tcp-wrappers gives "deny", whereas what one would like would be some
2098 kind of temporary error. A kludge has been added to help with this.
2099 Before calling hosts_ctl(), errno is set zero. If the result is "deny", a
2100 554 error is used if errno is still zero or contains ENOENT (which occurs
2101 if either of the /etc/hosts.{allow,deny} files is missing). Otherwise, a
2104 PH/03 Add -lutil to the default FreeBSD LIBS setting.
2106 PH/04 Change PH/19 for 4.61 was too wide. It should not be applied to host
2107 errors. Otherwise a message that provokes a temporary error (when other
2108 messages do not) can cause a whole host to time out.
2110 PH/05 Batch deliveries by appendfile and pipe transports did not work when the
2111 addresses were routed directly to files or pipes from a redirect router.
2112 File deliveries just didn't batch; pipe deliveries might have suffered
2115 PH/06 A failure to get a lock for a hints database would erroneously always say
2116 "Failed to get write lock", even when it was really a read lock.
2118 PH/07 The appendfile transport was creating MBX lock files with a fixed mode
2119 of 0600. This has been changed to use the value of the lockfile_mode
2120 option (which defaults to 0600).
2122 PH/08 Applied small patch from the Sieve maintainer.
2124 PH/09 If maildir_quota_directory_regex was set to exclude (say) the .Trash
2125 folder from quota calculations, a direct delivery into this folder messed
2126 up the contents of the maildirsize file. This was because the regex was
2127 used only to exclude .Trash (or whatever) when the size of the mailbox
2128 was calculated. There was no check that a delivery was happening into an
2129 excluded directory. This bug has been fixed by ignoring all quota
2130 processing for deliveries into excluded directories.
2132 PH/10 Added the maildirfolder_create_regex option to appendfile.
2138 PH/01 The code for finding all the local interface addresses on a FreeBSD
2139 system running IPv6 was broken. This may well have applied to all BSD
2140 systems, as well as to others that have similar system calls. The broken
2141 code found IPv4 interfaces correctly, but gave incorrect values for the
2142 IPv6 interfaces. In particular, ::1 was not found. The effect in Exim was
2143 that it would not match correctly against @[] and not recognize the IPv6
2146 PH/02 The ipliteral router was not recognizing addresses of the form user@
2147 [ipv6:....] because it didn't know about the "ipv6:" prefix.
2149 PH/03 Added disable_ipv6.
2151 PH/04 Changed $reply_address to use the raw form of the headers instead of the
2152 decoded form, because it is most often used to construct To: headers
2153 lines in autoreplies, and the decoded form may well be syntactically
2154 invalid. However, $reply_address has leading white space removed, and all
2155 newlines turned into spaces so that the autoreply transport does not
2158 PH/05 If group was specified without a user on a router, and no group or user
2159 was specified on a transport, the group from the router was ignored.
2161 PH/06 Increased the number of ACL variables to 20 of each type, and arranged
2162 for visible compile-time settings that can be used to change these
2163 numbers, for those that want even more. Backwards compatibility with old
2164 spool files has been maintained. However, going back to a previous Exim
2165 release will lost any variables that are in spool files.
2167 PH/07 Two small changes when running in the test harness: increase delay when
2168 passing a TCP/IP connection to a new process, in case the original
2169 process has to generate a bounce, and remove special handling of
2170 127.0.0.2 (sic), which is no longer necessary.
2172 PH/08 Changed debug output of dbfn_open() flags from numbers to names, so as to
2173 be the same on different OS.
2175 PH/09 Moved a debug statement in filter processing to avoid a race problem when
2178 JJ/01 exipick: fixed bug where -b (brief) output option showed "Vars:"
2179 whether --show-vars was specified or not
2181 JJ/02 exipick: Added support for new ACL variable spool format introduced
2184 PH/10 Fixed another bug related to PH/04 above: if an incoming message had a
2185 syntactically invalid From: or Reply-to: line, and a filter used this to
2186 generate an autoreply, and therefore failed to obtain an address for the
2187 autoreply, Exim could try to deliver to a non-existent relative file
2188 name, causing unrelated and misleading errors. What now happens is that
2189 it logs this as a hard delivery error, but does not attempt to create a
2192 PH/11 The exinext utility has a -C option for testing purposes, but although
2193 the given file was scanned by exinext itself; it wasn't being passed on
2194 when Exim was called.
2196 PH/12 In the smtp transport, treat an explicit ECONNRESET error the same as
2197 an end-of-file indication when reading a command response.
2199 PH/13 Domain literals for IPv6 were not recognized unless IPv6 support was
2200 compiled. In many other places in Exim, IPv6 addresses are always
2201 recognized, so I have changed this. It also means that IPv4 domain
2202 literals of the form [IPV4:n.n.n.n] are now always recognized.
2204 PH/14 When a uid/gid is specified for the queryprogram router, it cannot be
2205 used if the router is not running as root, for example, when verifying at
2206 ACL time, or when using -bh. The debugging output from this situation was
2207 non-existent - all you got was a failure to exec. I have made two
2210 (a) Failures to set uid/gid, the current directory, or a process leader
2211 in a subprocess such as that created by queryprogram now generate
2212 suitable debugging ouput when -d is set.
2214 (b) The queryprogram router detects when it is not running as root,
2215 outputs suitable debugging information if -d is set, and then runs
2216 the subprocess without attempting to change uid/gid.
2218 PH/15 Minor change to Makefile for building test_host (undocumented testing
2221 PH/16 As discussed on the list in Nov/Dec: Exim no longer looks at the
2222 additional section of a DNS packet that returns MX or SRV records.
2223 Instead, it always explicitly searches for A/AAAA records. This avoids
2224 major problems that occur when a DNS server includes only records of one
2225 type (A or AAAA) in an MX/SRV packet. A byproduct of this change has
2226 fixed another bug: if SRV records were looked up and the corresponding
2227 address records were *not* found in the additional section, the port
2228 values from the SRV records were lost.
2230 PH/17 If a delivery to a pipe, file, or autoreply was deferred, Exim was not
2231 using the correct key (the original address) when searching the retry
2232 rules in order to find which one to use for generating the retry hint.
2234 PH/18 If quota_warn_message contains a From: header, Exim now refrains from
2235 adding the default one. Similarly, if it contains a Reply-To: header, the
2236 errors_reply_to option, if set, is not used.
2238 PH/19 When calculating a retry time, Exim used to measure the "time since
2239 failure" by looking at the "first failed" field in the retry record. Now
2240 it does not use this if it is later than than the arrival time of the
2241 message. Instead it uses the arrival time. This makes for better
2242 behaviour in cases where some deliveries succeed, thus re-setting the
2243 "first failed" field. An example is a quota failure for a huge message
2244 when small messages continue to be delivered. Without this change, the
2245 "time since failure" will always be short, possible causing more frequent
2246 delivery attempts for the huge message than are intended.
2247 [Note: This change was subsequently modified - see PH/04 for 4.62.]
2249 PH/20 Added $auth1, $auth2, $auth3 to contain authentication data (as well as
2250 $1, $2, $3) because the numerical variables can be reset during some
2251 expansion items (e.g. "match"), thereby losing the authentication data.
2253 PH/21 Make -bV show the size of off_t variables so that the test suite can
2254 decide whether to run tests for quotas > 2G.
2256 PH/22 Test the values given for quota, quota_filecount, quota_warn_threshold,
2257 mailbox_size, and mailbox_filecount in the appendfile transport. If a
2258 filecount value is greater than 2G or if a quota value is greater than 2G
2259 on a system where the size of off_t is not greater than 4, a panic error
2262 PH/23 When a malformed item such as 1.2.3/24 appears in a host list, it can
2263 never match. The debug and -bh output now contains an explicit error
2264 message indicating a malformed IPv4 address or mask.
2266 PH/24 An host item such as 1.2.3.4/abc was being treated as the IP address
2267 1.2.3.4 without a mask. Now it is not recognized as an IP address, and
2268 PH/23 above applies.
2270 PH/25 Do not write to syslog when running in the test harness. The only
2271 occasion when this arises is a failure to open the main or panic logs
2272 (for which there is an explicit test).
2274 PH/26 Added the /no_tell option to "control=freeze".
2276 PH/27 If a host name lookup failed very early in a connection, for example, if
2277 the IP address matched host_lookup and the reverse lookup yielded a name
2278 that did not have a forward lookup, an error message of the form "no IP
2279 address found for host xxx.xxx.xxx (during SMTP connection from NULL)"
2280 could be logged. Now it outputs the IP address instead of "NULL".
2282 PH/28 An enabling patch from MH: add new function child_open_exim2() which
2283 allows the sender and the authenticated sender to be set when
2284 submitting a message from within Exim. Since child_open_exim() is
2285 documented for local_scan(), the new function should be too.
2287 PH/29 In GnuTLS, a forced expansion failure for tls_privatekey was not being
2288 ignored. In both GnuTLS and OpenSSL, an expansion of tls_privatekey that
2289 results in an empty string is now treated as unset.
2291 PH/30 Fix eximon buffer overflow bug (Bugzilla #73).
2293 PH/31 Added sender_verify_fail logging option.
2295 PH/32 In November 2003, the code in Exim that added an empty Bcc: header when
2296 needed by RFC 822 but not by RFC 2822 was commented out. I have now
2297 tidied the source and removed it altogether.
2299 PH/33 When a queue run was abandoned because the load average was too high, a
2300 log line was always written; now it is written only if the queue_run log
2301 selector is set. In addition, the log line for abandonment now contains
2302 information about the queue run such as the pid. This is always present
2303 in "start" and "stop" lines but was omitted from the "abandon" line.
2305 PH/34 Omit spaces between a header name and the colon in the error message that
2306 is given when verify = headers_syntax fails (if there are lots of them,
2307 the message gets confusing).
2309 PH/35 Change the default for dns_check_names_pattern to allow slashes within
2310 names, as there are now some PTR records that contain slashes. This check
2311 is only to protect against broken name servers that fall over on strange
2312 characters, so the fact that it applies to all lookups doesn't matter.
2314 PH/36 Now that the new test suite is complete, we can remove some of the
2315 special code in Exim that was needed for the old test suite. For example,
2316 sorting DNS records because real resolvers return them in an arbitrary
2317 order. The new test suite's fake resolver always returns records in the
2320 PH/37 When running in the test harness, use -odi for submitted messages (e.g.
2321 bounces) except when queue_only is set, to avoid logging races between
2322 the different processes.
2324 PH/38 Panic-die if .include specifies a non-absolute path.
2326 PH/39 A tweak to the "H" retry rule from its user.
2328 JJ/03 exipick: Removed parentheses from 'next' and 'last' calls that specified
2329 a label. They prevented compilation on older perls.
2331 JJ/04 exipick: Refactored code to prevent implicit split to @_ which caused
2332 a warning to be raised on newish perls.
2334 JJ/05 exipick: Fixed bug where -bpc always showed a count of all messages
2335 on queue. Changes to match documented behaviour of showing count of
2336 messages matching specified criteria.
2338 PH/40 Changed the default ident timeout from 30s to 5s.
2340 PH/41 Added support for the use of login_cap features, on those BSD systems
2341 that have them, for controlling the resources used by pipe deliveries.
2343 PH/42 The content-scanning code uses fopen() to create files in which to put
2344 message data. Previously it was not paying any attention to the mode of
2345 the files. Exim runs with umask(0) because the rest of the code creates
2346 files with open(), and sets the required mode explicitly. Thus, these
2347 files were ending up world-writeable. This was not a big issue, because,
2348 being within the spool directory, they were not world-accessible. I have
2349 created a function called modefopen, which takes an additional mode
2350 argument. It sets umask(777), creates the file, chmods it to the required
2351 mode, then resets the umask. All the relevant calls to fopen() in the
2352 content scanning code have been changed to use this function.
2354 PH/43 If retry_interval_max is set greater than 24 hours, it is quietly reset
2355 to 24 hours. This avoids potential overflow problems when processing G
2356 and H retry rules. I suspect nobody ever tinkers with this value.
2358 PH/44 Added STRIP_COMMAND=/usr/bin/strip to the FreeBSD Makefile.
2360 PH/45 When the plaintext authenticator is running as a client, the server's
2361 challenges are checked to ensure they are valid base64 strings. By
2362 default, the authentication attempt is cancelled if an invalid string is
2363 received. Setting client_ignore_invalid_base64 true ignores these errors.
2364 The decoded challenge strings are now placed in $auth1, $auth2, etc. as
2365 they are received. Thus, the responses can be made to depend on the
2366 challenges. If an invalid string is ignored, an empty string is placed in
2369 PH/46 Messages that are created by the autoreply transport now contains a
2370 References: header, in accordance with RFCs 2822 and 3834.
2372 PH/47 Added authenticated_sender_force to the smtp transport.
2374 PH/48 The ${prvs expansion was broken on systems where time_t was long long.
2376 PH/49 Installed latest patch from the Sieve maintainer.
2378 PH/50 When an Exim quota was set without a file count quota, and mailbox_size
2379 was also set, the appendfile transport was unnecessarily scanning a
2380 directory of message files (e.g. for maildir delivery) to find the count
2381 of files (along with the size), even though it did not need this
2382 information. It now does the scan only if it needs to find either the
2383 size of the count of files.
2385 PH/51 Added ${time_eval: to convert Exim time strings into seconds.
2387 PH/52 Two bugs concerned with error handling when the smtp transport is
2390 (i) Exim was not creating retry information for temporary errors given
2391 for individual recipients after the DATA command when the smtp transport
2392 was used in LMTP mode. This meant that they could be retried too
2393 frequently, and not timed out correctly.
2395 (ii) Exim was setting the flag that allows error details to be returned
2396 for LMTP errors on RCPT commands, but not for LMTP errors for individual
2397 recipients that were returned after the DATA command.
2399 PH/53 This is related to PH/52, but is more general: for any failing address,
2400 when detailed error information was permitted to be returned to the
2401 sender, but the error was temporary, then after the final timeout, only
2402 "retry timeout exceeded" was returned. Now it returns the full error as
2403 well as "retry timeout exceeded".
2405 PH/54 Added control=allow_auth_unadvertised, as it seems there are clients that
2406 do this, and (what is worse) MTAs that accept it.
2408 PH/55 Added the add_header modified to ACLs. The use of "message" with "warn"
2409 will now be deprecated.
2411 PH/56 New os.c-cygwin from the Cygwin maintainer.
2413 JJ/06 exipick: added --unsorted option to allow unsorted output in all output
2414 formats (previously only available in exim formats via -bpr, -bpru,
2415 and -bpra. Now also available in native and exiqgrep formats)
2417 JJ/07 exipick: added --freeze and --thaw options to allow faster interaction
2418 with very large, slow to parse queues
2420 JJ/08 exipick: added ! as generic prefix to negate any criteria format
2422 JJ/09 exipick: miscellaneous performance enhancements (~24% improvements)
2424 PH/57 Tidies in SMTP dialogue display in debug output: (i) It was not showing
2425 responses to authentication challenges, though it was showing the
2426 challenges; (ii) I've removed the CR characters from the debug output for
2429 PH/58 Allow for the insertion of a newline as well as a space when a string
2430 is turned into more than one encoded-word during RFC 2047 encoding. The
2431 Sieve code now uses this.
2433 PH/59 Added the following errors that can be detected in retry rules: mail_4xx,
2434 data_4xx, lost_connection, tls_required.
2436 PH/60 When a VRFY deferred or FAILED, the log message rather than the user
2437 message was being sent as an SMTP response.
2439 PH/61 Add -l and -k options to exicyclog.
2441 PH/62 When verifying, if an address was redirected to one new address, so that
2442 verification continued, and the new address failed or deferred after
2443 having set something in $address_data, the value of $address_data was not
2444 passed back to the ACL. This was different to the case when no
2445 redirection occurred. The value is now passed back in both cases.
2447 PH/63 Changed the macro HAVE_LOGIN_CAP (see PH/41 for this release above) to
2448 HAVE_SETCLASSRESOURCES because there are different APIs in use that all
2449 use login_cap.h, so on its own it isn't the distinguishing feature. The
2450 new name refers directly to the setclassresources() function.
2452 PH/65 Added configuration files for NetBSD3.
2454 PH/66 Updated OS/Makefile-HP-UX for gcc 4.1.0 with HP-UX 11.
2456 PH/67 Fixed minor infelicity in the sorting of addresses to ensure that IPv6
2457 is preferred over IPv4.
2459 PH/68 The bounce_return_message and bounce_return_body options were not being
2460 honoured for bounces generated during the reception of non-SMTP messages.
2461 In particular, this applied to messages rejected by the ACL. This bug has
2462 been fixed. However, if bounce_return_message is true and bounce_return_
2463 body is false, the headers that are returned for a non-SMTP message
2464 include only those that have been read before the error was detected.
2465 (In the case of an ACL rejection, they have all been read.)
2467 PH/69 The HTML version of the specification is now built in a directory called
2468 spec_html instead of spec.html, because the latter looks like a path with
2469 a MIME-type, and this confuses some software.
2471 PH/70 Catch two compiler warnings in sieve.c.
2473 PH/71 Fixed an obscure and subtle bug (thanks Alexander & Matthias). The
2474 function verify_get_ident() calls ip_connect() to connect a socket, but
2475 if the "connect()" function timed out, ip_connect() used to close the
2476 socket. However, verify_get_ident() also closes the socket later, and in
2477 between Exim writes to the log, which may get opened at this point. When
2478 the socket was closed in ip_connect(), the log could get the same file
2479 descriptor number as the socket. This naturally causes chaos. The fix is
2480 not to close the socket in ip_connect(); the socket should be closed by
2481 the function that creates it. There was only one place in the code where
2482 this was missing, in the iplookup router, which I don't think anybody now
2483 uses, but I've fixed it anyway.
2485 PH/72 Make dns_again_means_nonexist apply to lookups using gethostbyname() as
2486 well as to direct DNS lookups. Otherwise the handling of names in host
2487 lists is inconsistent and therefore confusing.
2493 PH/01 Two changes to the default runtime configuration:
2495 (1) Move the checks for relay_from_hosts and authenticated clients from
2496 after to before the (commented out) DNS black list checks.
2498 (2) Add control=submission to the relay_from_hosts and authenticated
2499 clients checks, on the grounds that messages accepted by these
2500 statements are most likely to be submissions.
2502 PH/02 Several tidies to the handling of ${prvs and ${prvscheck:
2504 (1) Generate an error if the third argument for the ${prvs expansion is
2507 (2) Treat a missing third argument of ${prvscheck as if it were an empty
2510 (3) Reset the variables that are obtained from the first argument of
2511 ${prvscheck and used in the second argument before leaving the code,
2512 because their memory is reclaimed, so using them afterwards may do
2515 (4) Tidy up the code for expanding the arguments of ${prvscheck one by
2516 one (it's much easier than Tom thought :-).
2518 (5) Because of (4), we can now allow for the use of $prvscheck_result
2519 inside the third argument.
2521 PH/03 For some reason, the default setting of PATH when running a command from
2522 a pipe transport was just "/usr/bin". I have changed it to
2525 PH/04 SUPPORT_TRANSLATE_IP_ADDRESS and MOVE_FROZEN_MESSAGES did not cause
2526 anything to be listed in the output from -bV.
2528 PH/05 When a filter generated an autoreply, the entire To: header line was
2529 quoted in the delivery log line, like this:
2531 => >A.N.Other <ano@some.domain> <original@ddress> ...
2533 This has been changed so that it extracts the operative address. There
2534 may be more than one such address. If so, they are comma-separated, like
2537 => >ano@some.domain,ona@other.domain <original@ddress> ...
2539 PH/06 When a client host used a correct literal IP address in a HELO or EHLO
2540 command, (for example, EHLO [1.2.3.4]) and the client's IP address was
2541 not being looked up in the rDNS to get a host name, Exim was showing the
2542 IP address twice in Received: lines, even though the IP addresses were
2543 identical. For example:
2545 Received: from [1.2.3.4] (helo=[1.2.3.4])
2547 However, if the real host name was known, it was omitting the HELO data
2548 if it matched the actual IP address. This has been tidied up so that it
2549 doesn't show the same IP address twice.
2551 PH/07 When both +timestamp and +memory debugging was on, the value given by
2552 $tod_xxx expansions could be wrong, because the tod_stamp() function was
2553 called by the debug printing, thereby overwriting the timestamp buffer.
2554 Debugging no longer uses the tod_stamp() function when +timestamp is set.
2556 PH/08 When the original message was included in an autoreply transport, it
2557 always said "this is a copy of the message, including all the headers",
2558 even if body_only or headers_only was set. It now gives an appropriate
2561 PH/09 Applied a patch from the Sieve maintainer which:
2563 o fixes some comments
2564 o adds the (disabled) notify extension core
2565 o adds some debug output for the result of if/elsif tests
2566 o points to the current vacation draft in the documentation
2567 and documents the missing references header update
2571 o fixes a bug in processing the envelope test (when testing
2572 multiple envelope elements, the last element determinted the
2575 PH/10 Exim was violating RFC 3834 ("Recommendations for Automatic Responses to
2576 Electronic Mail") by including:
2578 Auto-submitted: auto-generated
2580 in the messages that it generates (bounce messages and others, such as
2581 warnings). In the case of bounce messages for non-SMTP mesages, there was
2582 also a typo: it was using "Auto_submitted" (underscore instead of
2583 hyphen). Since every message generated by Exim is necessarily in response
2584 to another message, thes have all been changed to:
2586 Auto-Submitted: auto-replied
2588 in accordance with these statements in the RFC:
2590 The auto-replied keyword:
2592 - SHOULD be used on messages sent in direct response to another
2593 message by an automatic process,
2595 - MUST NOT be used on manually-generated messages,
2597 - MAY be used on Delivery Status Notifications (DSNs) and Message
2598 Disposition Notifications (MDNs),
2600 - MUST NOT be used on messages generated by automatic or periodic
2601 processes, except for messages which are automatic responses to
2604 PH/11 Added "${if def:sender_address {(envelope-from <$sender_address>)\n\t}}"
2605 to the default Received: header definition.
2607 PH/12 Added log selector acl_warn_skipped (default on).
2609 PH/13 After a successful wildlsearch lookup, discard the values of numeric
2610 variables because (a) they are in the wrong storage pool and (b) even if
2611 they were copied, it wouldn't work properly because of the caching.
2613 PH/14 Add check_rfc2047_length to disable enforcement of RFC 2047 length
2614 checking when decoding. Apparently there are clients that generate
2615 overlong encoded strings. Why am I not surprised?
2617 PH/15 If the first argument of "${if match_address" was not empty, but did not
2618 contain an "@" character, Exim crashed. Now it writes a panic log message
2619 and treats the condition as false.
2621 PH/16 In autoreply, treat an empty string for "once" the same as unset.
2623 PH/17 A further patch from the Sieve maintainer: "Introduce the new Sieve
2624 extension "envelope-auth". The code is finished and in agreement with
2625 other implementations, but there is no documentation so far and in fact,
2626 nobody wrote the draft yet. This extension is currently #undef'ed, thus
2627 not changing the active code.
2629 Print executed "if" and "elsif" statements when debugging is used. This
2630 helps a great deal to understand what a filter does.
2632 Document more things not specified clearly in RFC3028. I had all this
2633 sorted out, when out of a sudden new issues came to my mind. Oops."
2635 PH/18 Exim was not recognizing the "net-" search type prefix in match_ip lists
2638 PH/19 Exim expands the IPv6 address given to -bh to its full non-abbreviated
2639 canonical form (as documented). However, after a host name lookup from
2640 the IP address, check_host() was doing a simple string comparison with
2641 addresses acquired from the DNS when checking that the found name did
2642 have the original IP as one of its addresses. Since any found IPv6
2643 addresses are likely to be in abbreviated form, the comparison could
2644 fail. Luckily, there already exists a function for doing the comparison
2645 by converting both addresses to binary, so now that is used instead of
2646 the text comparison.
2648 PH/20 There was another similar case to PH/19, when a complete host name was
2649 given in a host list; looking up its IP address could give an abbreviated
2650 form, whereas the current host's name might or might not be abbreviated.
2651 The same fix has been applied.
2657 PH/01 The ${base62: operator adjusted itself to base 36 when BASE_62 was
2658 set to 36 (for Darwin and Cygwin), but the ${base62d: operator did not.
2661 PH/02 Two minor problems detected in Cygwin: the os.{c,h} files had lost */ on
2662 the CVS lines, and there was a missing #if HAVE_IPV6 in host.c.
2664 PH/03 Typo: missing ".o" in src/pcre/Makefile.
2666 PH/04 Tighten up "personal" tests: Instead of testing for any "List-"
2667 header line, restrict the check to what is listed in RFCs 2369 and 2929.
2668 Also, for "Auto-Submitted", treat anything other than "no" as
2669 non-personal, in accordance with RFC 3834. (Previously it treated
2670 anything starting "auto-" as non-personal.)
2672 TF/01 The control=submission/name=... option had a problem with syntax
2673 errors if the name included a slash character. The /name= option
2674 now slurps the rest of the string, so it can include any characters
2675 but it must come last in the list of options (after /sender_retain
2678 PH/05 Some modifications to the interface to the fake nameserver for the new
2686 TK/01 Added the "success_on_redirect" address verification option. See
2687 NewStuff for rationale and an example.
2689 PH/01 Added support for SQLite, basic code supplied by David Woodhouse.
2691 PH/02 Patch to exigrep to allow it to work on syslog lines.
2693 PH/03 When creating an mbox file for a virus/spam scan, use fseek() instead of
2694 fread() to skip over the body file's header line, because in Cygwin the
2695 header line is locked and is inaccessible.
2697 PH/04 Added $message_exim_id, ultimately to replace $message_id (they will both
2698 co-exist for some time) to make it clear that it is the Exim ID that is
2699 referenced, not the Message-ID: header line.
2701 PH/05 Replaced all Tom's calls to snprintf() with calls to the internal
2702 string_format() function, because snprintf() does not exist on all
2705 PH/06 The use of forbid_filter_existstest now also locks out the use of the
2706 ${stat: expansion item.
2708 PH/07 Changed "SMTP protocol violation: synchronization error" into "SMTP
2709 protocol synchronization error", to keep the pedants happy.
2711 PH/08 Arrange for USE_INET_NTOA_FIX to be set in config.h for AIX systems as
2712 well as for IRIX systems, when gcc is being used. See the host.c source
2715 PH/09 Installed latest Cygwin configuration files from the Cygwin maintainer.
2717 PH/10 Named domain lists were not working if used in a queue_smtp_domains
2720 PH/11 Added support for the IGNOREQUOTA extension to LMTP, both to the lmtp
2721 transport and to the smtp transport in LMTP mode.
2723 TK/02 Remove one case of BASE64 error detection FTTB (undocumented anyway).
2725 PH/12 There was a missing call to search_tidyup() before the fork() in rda.c to
2726 run a filter in a subprocess. This could lead to confusion in subsequent
2727 lookups in the parent process. There should also be a search_tidyup() at
2728 the end of the subprocess.
2730 PH/13 Previously, if "verify = helo" was set in an ACL, the condition was true
2731 only if the host matched helo_try_verify_hosts, which caused the
2732 verification to occur when the EHLO/HELO command was issued. The ACL just
2733 tested the remembered result. Now, if a previous verification attempt has
2734 not happened, "verify = helo" does it there and then.
2736 JJ/01 exipick: added $message_exim_id variable (see 4.53-PH/04)
2738 TK/03 Fix log output including CR from clamd.
2740 PH/14 A reference to $reply_address when Reply-to: was empty and From: did not
2741 exist provoked a memory error which could cause a segfault.
2743 PH/15 Installed PCRE 6.2
2745 PH/17 Defined BIND_8_COMPAT in the Darwin os.h file.
2747 PH/18 Reversed 4.52/PH/17 because the HP-UX user found it wasn't the cause
2748 of the problem. Specifically, suggested +O2 rather than +O1 for the
2751 PH/19 Added sqlite_lock_timeout option (David Woodhouse's patch).
2753 PH/20 If a delivery was routed to a non-standard port by means of an SRV
2754 record, the port was not correctly logged when the outgoing_port log
2755 selector was set (it logged the transort's default port).
2757 PH/21 Added support for host-specific ports to manualroute, queryprogram,
2758 fallback_hosts, and "hosts" in the smtp transport.
2760 PH/22 If the log selector "outgoing_port" is set, the port is now also given on
2761 host errors such as "Connection refused".
2763 PH/23 Applied a patch to fix problems with exim-4.52 while doing radius
2764 authentication with radiusclient 0.4.9:
2766 - Error returned from rc_read_config was caught wrongly
2767 - Username/password not passed on to radius server due to wrong length.
2769 The presumption is that some radiusclient API changes for 4.51/PH/17
2770 were not taken care of correctly. The code is still untested by me (my
2771 Linux distribution still has 0.3.2 of radiusclient), but it was
2772 contributed by a Radius user.
2774 PH/24 When doing a callout, the value of $domain wasn't set correctly when
2775 expanding the "port" option of the smtp transport.
2777 TK/04 MIME ACL: Fix buffer underrun that occurs when EOF condition is met
2778 while reading a MIME header. Thanks to Tom Hughes for a patch.
2780 PH/24 Include config.h inside local_scan.h so that configuration settings are
2783 PH/25 Make $smtp_command_argument available after all SMTP commands. This means
2784 that in an ACL for RCPT (for example), you can examine exactly what was
2787 PH/26 Exim was recognizing IPv6 addresses of the form [IPv6:....] in EHLO
2788 commands, but it was not correctly comparing the address with the actual
2789 client host address. Thus, it would show the EHLO address in Received:
2790 header lines when this was not necessary.
2792 PH/27 Added the % operator to ${eval:}.
2794 PH/28 Exim tries to create and chdir to its spool directory when it starts;
2795 it should be ignoring failures (because with -C, for example, it has lost
2796 privilege). It wasn't ignoring creation failures other than "already
2799 PH/29 Added "crypteq" to the list of supported features that Exim outputs when
2802 PH/30 Fixed (presumably very longstanding) bug in exim_dbmbuild: if it failed
2803 because an input line was too long, either on its own, or by virtue of
2804 too many continuations, the temporary file was not being removed, and the
2805 return code was incorrect.
2807 PH/31 Missing "BOOL" in function definition in filtertest.c.
2809 PH/32 Applied Sieve patches from the maintainer.
2811 TK/05 Domainkeys: Accomodate for a minor API change in libdomainkeys 0.67.
2813 PH/33 Added "verify = not_blind".
2815 PH/34 There are settings for CHOWN_COMMAND and MV_COMMAND that can be used in
2816 Local/Makefile (with some defaults set). These are used in built scripts
2817 such as exicyclog, but they have never been used in the exim_install
2818 script (though there are many overriding facilities there). I have
2819 arranged that the exim_install script now takes note of these two
2822 PH/35 Installed configuration files for Dragonfly.
2824 PH/36 When a locally submitted message by a trusted user did not contain a
2825 From: header, and the sender address was obtained from -f or from an SMTP
2826 MAIL command, and the trusted user did not use -F to supply a sender
2827 name, $originator_name was incorrectly used when constructing a From:
2828 header. Furthermore, $originator_name was used for submission mode
2829 messages from external hosts without From: headers in a similar way,
2830 which is clearly wrong.
2832 PH/37 Added control=suppress_local_fixups.
2834 PH/38 When log_selector = +received_sender was set, and the addition of the
2835 sender made the log line's construction buffer exactly full, or one byte
2836 less than full, an overflow happened when the terminating "\n" was
2839 PH/39 Added a new log selector, "unknown_in_list", which provokes a log entry
2840 when the result of a list match is failure because a DNS lookup failed.
2842 PH/40 RM_COMMAND is now used in the building process.
2844 PH/41 Added a "distclean" target to the top-level Makefile; it deletes all
2845 the "build-* directories that it finds.
2847 PH/42 (But a TF fix): In a domain list, Exim incorrectly matched @[] if the IP
2848 address in a domain literal was a prefix of an interface address.
2850 PH/43 (Again a TF fix): In the dnslookup router, do not apply widen_domains
2851 when verifying a sender address, unless rewrite_headers is false.
2853 PH/44 Wrote a long comment about why errors_to addresses are verified as
2854 recipients, not senders.
2856 TF/01 Add missing LIBS=-lm to OS/Makefile-OpenBSD which was overlooked when
2857 the ratelimit ACL was added.
2859 PH/45 Added $smtp_command for the full command (cf $smtp_command_argument).
2861 PH/46 Added extra information about PostgreSQL errors to the error string.
2863 PH/47 Added an interface to a fake DNS resolver for use by the new test suite,
2864 avoiding the need to install special zones in a real server. This is
2865 backwards compatible; if it can't find the fake resolver, it drops back.
2866 Thus, both old and new test suites can be run.
2868 TF/02 Added util/ratelimit.pl
2870 TF/03 Minor fix to the ratelimit code to improve its behaviour in case the
2871 clock is set back in time.
2873 TF/04 Fix the ratelimit support in exim_fixdb. Patch provided by Brian
2874 Candler <B.Candler@pobox.com>.
2876 TF/05 The fix for PH/43 was not completely correct; widen_domains is always
2877 OK for addresses that are the result of redirections.
2879 PH/48 A number of further additions for the benefit of the new test suite,
2880 including a fake gethostbyname() that interfaces to the fake DNS resolver
2883 TF/06 The fix for widen_domains has also been applied to qualify_single and
2884 search_parents which are the other dnslookup options that can cause
2887 PH/49 Michael Haardt's randomized retrying, but as a separate retry parameter
2890 PH/50 Make never_users, trusted_users, admin_groups, trusted_groups expandable.
2892 TF/07 Exim produced the error message "an SRV record indicated no SMTP
2893 service" if it encountered an MX record with an empty target hostname.
2894 The message is now "an MX or SRV record indicated no SMTP service".
2896 TF/08 Change PH/13 introduced the possibility that verify=helo may defer,
2897 if the DNS of the sending site is misconfigured. This is quite a
2898 common situation. This change restores the behaviour of treating a
2899 helo verification defer as a failure.
2901 PH/51 If self=fail was set on a router, the bounce message did not include the
2902 actual error message.
2908 TF/01 Added support for Client SMTP Authorization. See NewStuff for details.
2910 PH/01 When a transport filter timed out in a pipe delivery, and the pipe
2911 command itself ended in error, the underlying message about the transport
2912 filter timeout was being overwritten with the pipe command error. Now the
2913 underlying error message should be appended to the second error message.
2915 TK/01 Fix poll() being unavailable on Mac OSX 10.2.
2917 PH/02 Reduce the amount of output that "make" produces by default. Full output
2918 can still be requested.
2920 PH/03 The warning log line about a condition test deferring for a "warn" verb
2921 was being output only once per connection, rather than after each
2922 occurrence (because it was using the same function as for successful
2923 "warn" verbs). This seems wrong, so I have changed it.
2925 TF/02 Two buglets in acl.c which caused Exim to read a few bytes of memory that
2926 it should not have, which might have caused a crash in the right
2927 circumstances, but probably never did.
2929 PH/04 Installed a modified version of Tony Finch's patch to make submission
2930 mode fix the return path as well as the Sender: header line, and to
2931 add a /name= option so that you can make the user's friendly name appear
2934 TF/03 Added the control = fakedefer ACL modifier.
2936 TF/04 Added the ratelimit ACL condition. See NewStuff for details. Thanks to
2937 Mark Lowes for thorough testing.
2939 TK/02 Rewrote SPF support to work with libspf2 versions >1.2.0.
2941 TK/03 Merged latest SRS patch from Miles Wilton.
2943 PH/05 There's a shambles in IRIX6 - it defines EX_OK in unistd.h which conflicts
2944 with the definition in sysexits.h (which is #included earlier).
2945 Fortunately, Exim does not actually use EX_OK. The code used to try to
2946 preserve the sysexits.h value, by assumimg that macro definitions were
2947 scanned for macro replacements. I have been disabused of this notion,
2948 so now the code just undefines EX_OK before #including unistd.h.
2950 PH/06 There is a timeout for writing blocks of data, set by, e.g. data_timeout
2951 in the smtp transport. When a block could not be written in a single
2952 write() function, the timeout was being re-applied to each part-write.
2953 This seems wrong - if the receiver was accepting one byte at a time it
2954 would take for ever. The timeout is now adjusted when this happens. It
2955 doesn't have to be particularly precise.
2957 TK/04 Added simple SPF lookup method in EXPERIMENTAL_SPF. See NewStuff for
2958 details. Thanks to Chris Webb <chris@arachsys.com> for the patch!
2960 PH/07 Added "fullpostmaster" verify option, which does a check to <postmaster>
2961 without a domain if the check to <postmaster@domain> fails.
2963 SC/01 Eximstats: added -xls and the ability to specify output files
2964 (patch written by Frank Heydlauf).
2966 SC/02 Eximstats: use FileHandles for outputing results.
2968 SC/03 Eximstats: allow any combination of xls, txt, and html output.
2970 SC/04 Eximstats: fixed display of large numbers with -nvr option
2972 SC/05 Eximstats: fixed merging of reports with empty tables.
2974 SC/06 Eximstats: added the -include_original_destination flag
2976 SC/07 Eximstats: removed tabs and trailing whitespace.
2978 TK/05 Malware: Improve on aveserver error handling. Patch from Alex Miller.
2980 TK/06 MBOX spool code: Add real "From " MBOX separator line
2981 so the .eml file is really in mbox format (even though
2982 most programs do not really care). Patch from Alex Miller.
2984 TK/07 MBOX spool code: Add X-Envelope-From: and X-Envelope-To: headers.
2985 The latter is generated from $received_to and is only set if the
2986 message has one envelope recipient. SA can use these headers,
2987 obviously out-of-the-box. Patch from Alex Miller.
2989 PH/08 The ${def test on a variable was returning false if the variable's
2990 value was "0", contrary to what the specification has always said!
2991 The result should be true unless the variable is empty.
2993 PH/09 The syntax error of a character other than { following "${if
2994 def:variable_name" (after optional whitespace) was not being diagnosed.
2995 An expansion such as ${if def:sender_ident:{xxx}{yyy}} in which an
2996 accidental colon was present, for example, could give incorrect results.
2998 PH/10 Tidied the code in a number of places where the st_size field of a stat()
2999 result is used (not including appendfile, where other changes are about
3002 PH/11 Upgraded appendfile so that quotas larger than 2G are now supported.
3003 This involved changing a lot of size variables from int to off_t. It
3004 should work with maildirs and everything.
3006 TK/08 Apply fix provided by Michael Haardt to prevent deadlock in case of
3007 spamd dying while we are connected to it.
3009 TF/05 Fixed a ${extract error message typo reported by Jeremy Harris
3012 PH/12 Applied Alex Kiernan's patch for the API change for the error callback
3013 function for BDB 4.3.
3015 PH/13 Changed auto_thaw such that it does not apply to bounce messages.
3017 PH/14 Imported PCRE 6.0; this was more than just a trivial operation because
3018 the sources for PCRE have been re-arranged and more files are now
3021 PH/15 The code I had for printing potentially long long variables in PH/11
3022 above was not the best (it lost precision). The length of off_t variables
3023 is now inspected at build time, and an appropriate printing format (%ld
3024 or %lld) is chosen and #defined by OFF_T_FMT. We also define LONGLONG_T
3025 to be "long long int" or "long int". This is needed for the internal
3026 formatting function string_vformat().
3028 PH/16 Applied Matthew Newton's patch to exicyclog: "If log_file_path is set in
3029 the configuration file to be ":syslog", then the script "guesses" where
3030 the logs files are, rather than using the compiled in default. In our
3031 case the guess is not the same as the compiled default, so the script
3032 suddenly stopped working when I started to use syslog. The patch checks
3033 to see if log_file_path is "". If so, it attempts to read it from exim
3034 with no configuration file to get the compiled in version, before it
3035 falls back to the previous guessing code."
3037 TK/09 Added "prvs" and "prvscheck" expansion items. These help a lot with
3038 implementing BATV in an Exim configuration. See NewStuff for the gory
3041 PH/17 Applied Michael Haardt's patch for HP-UX, affecting only the os.h and
3042 Makefile that are specific to HP-UX.
3044 PH/18 If the "use_postmaster" option was set for a recipient callout together
3045 with the "random" option, the postmaster address was used as the MAIL
3046 FROM address for the random test, but not for the subsequent recipient
3047 test. It is now used for both.
3049 PH/19 Applied Michael Haardt's patch to update Sieve to RFC3028bis. "The
3050 patch removes a few documentation additions to RFC 3028, because the
3051 latest draft now contains them. It adds the new en;ascii-case comparator
3052 and a new error check for 8bit text in MIME parts. Comparator and
3053 require names are now matched exactly. I enabled the subaddress
3054 extension, but it is not well tested yet (read: it works for me)."
3056 PH/20 Added macros for time_t as for off_t (see PH/15 above) and used them to
3057 rework some of the code of TK/09 above to avoid the hardwired use of
3058 "%lld" and "long long". Replaced the call to snprintf() with a call to
3061 PH/21 Added some other messages to those in 4.51/PH/42, namely "All relevant MX
3062 records point to non-existent hosts", "retry timeout exceeded", and
3063 "retry time not reached for any host after a long failure period".
3065 PH/22 Fixed some oversights/typos causing bugs when Exim is compiled with
3066 experimental DomainKeys support:
3068 (1) The filter variables $n0-$n9 and $sn0-$sn9 were broken.
3069 (2) On an error such as an illegally used "control", the wrong name for
3070 the control was given.
3072 These problems did NOT occur unless DomainKeys support was compiled.
3074 PH/23 Added daemon_startup_retries and daemon_startup_sleep.
3076 PH/24 Added ${if match_ip condition.
3078 PH/25 Put debug statements on either side of calls to EXIM_DBOPEN() for hints
3079 databases so that it will be absolutely obvious if a crash occurs in the
3080 DB library. This is a regular occurrence (often caused by mis-matched
3083 PH/26 Insert a lot of missing (void) casts for functions such as chown(),
3084 chmod(), fcntl(), sscanf(), and other functions from stdio.h. These were
3085 picked up on a user's system that detects such things. There doesn't seem
3086 to be a gcc warning option for this - only an attribute that has to be
3087 put on the function's prototype. It seems that in Fedora Core 4 they have
3088 set this on a number of new functions. No doubt there will be more in due
3091 PH/27 If a dnslookup or manualroute router is set with verify=only, it need not
3092 specify a transport. However, if an address that was verified by such a
3093 router was the subject of a callout, Exim crashed because it tried to
3094 read the rcpt_include_affixes from the non-existent transport. Now it
3095 just assumes that the setting of that option is false. This bug was
3096 introduced by 4.51/PH/31.
3098 PH/28 Changed -d+all to exclude +memory, because that information is very
3099 rarely of interest, but it makes the output a lot bigger. People tend to
3100 do -d+all out of habit.
3102 PH/29 Removed support for the Linux-libc5 build, as it is obsolete and the
3103 code in os-type was giving problems when libc.so lives in lib64, like on
3106 PH/30 Exim's DNS code uses the original T_xxx names for DNS record times. These
3107 aren't the modern standard, and it seems that some systems' include files
3108 don't always have them. Exim was already checking for some of the newer
3109 ones like T_AAAA, and defining it itself. I've added checks for all the
3110 record types that Exim uses.
3112 PH/31 When using GnuTLS, if the parameters cache file did not exist, Exim was
3113 not automatically generating a new one, as it is supposed to. This
3114 prevented TLS from working. If the file did exist, but contained invalid
3115 data, a new version was generated, as expected. It was only the case of a
3116 non-existent file that was broken.
3118 TK/10 Domainkeys: Fix a bug in verification that caused a crash in conjunction
3119 with a change in libdomainkeys > 0.64.
3121 TK/11 Domainkeys: Change the logic how the "testing" policy flag is retrieved
3122 from DNS. If the selector record carries the flag, it now has
3123 precedence over the domain-wide flag.
3125 TK/12 Cleared some compiler warnings related to SPF, SRS and DK code.
3127 PH/32 In mua_wrapper mode, if an smtp transport configuration error (such as
3128 the use of a port name that isn't defined in /etc/services) occurred, the
3129 message was deferred as in a normal delivery, and thus remained on the
3130 spool, instead of being failed because of the mua_wrapper setting. This
3131 is now fixed, and I tidied up some of the mua_wrapper messages at the
3134 SC/08 Eximstats: whilst parsing the mainlog(s), store information about
3135 the messages in a hash of arrays rather than using individual hashes.
3136 This is a bit cleaner and results in dramatic memory savings, albeit
3137 at a slight CPU cost.
3139 SC/09 Eximstats: added the -show_rt<list> and the -show_dt<list> flags
3140 as requested by Marc Sherman.
3142 SC/10 Eximstats: added histograms for user specified patterns as requested
3145 SC/11 Eximstats: v1.43 - bugfix for pattern histograms with -h0 specified.
3147 PH/33 Patch from the Cygwin maintainer to add "b" to all occurences of
3148 fopen() in the content-scanning modules that did not already have it.
3154 TK/01 Added Yahoo DomainKeys support via libdomainkeys. See
3155 doc/experimental-spec.txt for details. (http://domainkeys.sf.net)
3157 TK/02 Fix ACL "control" statement not being available in MIME ACL.
3159 TK/03 Fix ACL "regex" condition not being available in MIME ACL.
3161 PH/01 Installed a patch from the Sieve maintainer that allows -bf to be used
3162 to test Sieve filters that use "vacation".
3164 PH/02 Installed a slightly modified version of Nikos Mavrogiannopoulos' patch
3165 that changes the way the GnuTLS parameters are stored in the cache file.
3166 The new format can be generated externally. For backward compatibility,
3167 if the data in the cache doesn't make sense, Exim assumes it has read an
3168 old-format file, and it generates new data and writes a new file. This
3169 means that you can't go back to an older release without removing the
3172 PH/03 A redirect router that has both "unseen" and "one_time" set does not
3173 work if there are any delivery delays because "one_time" forces the
3174 parent to be marked "delivered", so its unseen clone is never tried
3175 again. For this reason, Exim now forbids the simultaneous setting of
3178 PH/04 Change 4.11/85 fixed an obscure bug concerned with addresses that are
3179 redirected to themselves ("homonym" addresses). Read the long ChangeLog
3180 entry if you want to know the details. The fix, however, neglected to
3181 consider the case when local delivery batching is involved. The test for
3182 "previously delivered" was not happening when checking to see if an
3183 address could be batched with a previous (undelivered) one; under
3184 certain circumstances this could lead to multiple deliveries to the same
3187 PH/05 Renamed the macro SOCKLEN_T as EXIM_SOCKLEN_T because AIX uses SOCKLEN_T
3188 in its include files, and this causes problems building Exim.
3190 PH/06 A number of "verify =" ACL conditions have no options (e.g. verify =
3191 header_syntax) but Exim was just ignoring anything given after a slash.
3192 In particular, this caused confusion with an attempt to use "verify =
3193 reverse_host_lookup/defer_ok". An error is now given when options are
3194 supplied for verify items that do not have them. (Maybe reverse_host_
3195 lookup should have a defer_ok option, but that's a different point.)
3197 PH/07 Increase the size of the buffer for incoming SMTP commands from 512 (as
3198 defined by RFC 821) to 2048, because there were problems with some AUTH
3199 commands, and RFC 1869 says the size should be increased for extended
3200 SMTP commands that take arguments.
3202 PH/08 Added ${dlfunc dynamically loaded function for expansion (code from Tony
3205 PH/09 Previously, an attempt to use ${perl when it wasn't compiled gave an
3206 "unknown" error; now it says that the functionality isn't in the binary.
3208 PH/10 Added a nasty fudge to try to recognize and flatten LDAP passwords in
3209 an address' error message when a string expansion fails (syntax or
3210 whatever). Otherwise the password may appear in the log. Following change
3211 PH/42 below, there is no longer a chance of it appearing in a bounce
3214 PH/11 Installed exipick version 20050225.0 from John Jetmore.
3216 PH/12 If the last host in a fallback_hosts list was multihomed, only the first
3217 of its addresses was ever tried. (Bugzilla bug #2.)
3219 PH/13 If "headers_add" in a transport didn't end in a newline, Exim printed
3220 the result incorrectly in the debug output. (It correctly added a newline
3221 to what was transported.)
3223 TF/01 Added $received_time.
3225 PH/14 Modified the default configuration to add an acl_smtp_data ACL, with
3226 commented out examples of how to interface to a virus scanner and to
3227 SpamAssassin. Also added commented examples of av_scanner and
3228 spamd_address settings.
3230 PH/15 Further to TK/02 and TK/03 above, tidied up the tables of what conditions
3231 and controls are allowed in which ACLs. There were a couple of minor
3232 errors. Some of the entries in the conditions table (which is a table of
3233 where they are NOT allowed) were getting very unwieldy; rewrote them as a
3234 negation of where the condition IS allowed.
3236 PH/16 Installed updated OS/os.c-cygwin from the Cygwin maintainer.
3238 PH/17 The API for radiusclient changed at release 0.4.0. Unfortunately, the
3239 header file does not have a version number, so I've had to invent a new
3240 value for RADIUS_LIB_TYPE, namely "RADIUSCLIENTNEW" to request the new
3241 API. The code is untested by me (my Linux distribution still has 0.3.2 of
3242 radiusclient), but it was contributed by a Radius user.
3244 PH/18 Installed Lars Mainka's patch for the support of CRL collections in
3245 files or directories, for OpenSSL.
3247 PH/19 When an Exim process that is running as root has to create an Exim log
3248 file, it does so in a subprocess that runs as exim:exim so as to get the
3249 ownership right at creation (otherwise, other Exim processes might see
3250 the file with the wrong ownership). There was no test for failure of this
3251 fork() call, which would lead to the process getting stuck as it waited
3252 for a non-existent subprocess. Forks do occasionally fail when resources
3253 run out. I reviewed all the other calls to fork(); they all seem to check
3256 PH/20 When checking for unexpected SMTP input at connect time (before writing
3257 the banner), Exim was not dealing correctly with a non-positive return
3258 from the read() function. If the client had disconnected by this time,
3259 the result was a log entry for a synchronization error with an empty
3260 string after "input=" when read() returned zero. If read() returned -1
3261 (an event I could not check), uninitialized data bytes were printed.
3262 There were reports of junk text (parts of files, etc) appearing after
3265 PH/21 Added acl_not_smtp_mime to allow for MIME scanning for non-SMTP messages.
3267 PH/22 Added support for macro redefinition, and (re)definition in between
3268 driver and ACL definitions.
3270 PH/23 The cyrus_sasl authenticator was expanding server_hostname, but then
3271 forgetting to use the resulting value; it was using the unexpanded value.
3273 PH/24 The cyrus_sasl authenticator was advertising mechanisms for which it
3274 hadn't been configured. The fix is from Juergen Kreileder, who
3275 understands it better than I do:
3277 "Here's what I see happening with three configured cyrus_sasl
3278 authenticators configured (plain, login, cram-md5):
3280 On startup auth_cyrus_sasl_init() gets called for each of these.
3281 This means three calls to sasl_listmech() without a specified mech_list.
3282 => SASL tests which mechs of all available mechs actually work
3283 => three warnings about OTP not working
3284 => the returned list contains: plain, login, cram-md5, digest-md5, ...
3286 With the patch, sasl_listmech() also gets called three times. But now
3287 SASL's mech_list option is set to the server_mech specified in the the
3288 authenticator. Or in other words, the answer from sasl_listmech()
3289 gets limited to just the mech you're testing for (which is different
3291 => the return list contains just 'plain' or 'login', 'cram-md5' or
3292 nothing depending on the value of ob->server_mech.
3294 I've just tested the patch: Authentication still works fine,
3295 unavailable mechs specified in the exim configuration are still
3296 caught, and the auth.log warnings about OTP are gone."
3298 PH/25 When debugging is enabled, the contents of the command line are added
3299 to the debugging output, even when log_selector=+arguments is not
3302 PH/26 Change scripts/os-type so that when "uname -s" returns just "GNU", the
3303 answer is "GNU", and only if the return is "GNU/something" is the answer
3306 PH/27 $acl_verify_message is now set immediately after the failure of a
3307 verification in an ACL, and so is available in subsequent modifiers. In
3308 particular, the message can be preserved by coding like this:
3310 warn !verify = sender
3311 set acl_m0 = $acl_verify_message
3313 Previously, $acl_verify_message was set only while expanding "message"
3314 and "log_message" when a very denied access.
3316 PH/28 Modified OS/os.c-Linux with
3318 -#ifndef OS_LOAD_AVERAGE
3319 +#if !defined(OS_LOAD_AVERAGE) && defined(__linux__)
3321 to make Exim compile on kfreebsd-gnu. (I'm totally confused about the
3322 nomenclature these days.)
3324 PH/29 Installed patch from the Sieve maintainer that adds the options
3325 sieve_useraddress and sieve_subaddress to the redirect router.
3327 PH/30 In these circumstances:
3328 . Two addresses routed to the same list of hosts;
3329 . First host does not offer TLS;
3330 . First host accepts first address;
3331 . First host gives temporary error to second address;
3332 . Second host offers TLS and a TLS session is established;
3333 . Second host accepts second address.
3334 Exim incorrectly logged both deliveries with the TLS parameters (cipher
3335 and peerdn, if requested) that were in fact used only for the second
3338 PH/31 When doing a callout as part of verifying an address, Exim was not paying
3339 attention to any local part prefix or suffix that was matched by the
3340 router that accepted the address. It now behaves in the same way as it
3341 does for delivery: the affixes are removed from the local part unless
3342 rcpt_include_affixes is set on the transport.
3344 PH/32 Add the sender address, as F=<...>, to the log line when logging a
3345 timeout during the DATA phase of an incoming message.
3347 PH/33 Sieve envelope tests were broken for match types other than :is. I have
3348 applied a patch sanctioned by the Sieve maintainer.
3350 PH/34 Change 4.50/80 broke Exim in that it could no longer handle cases where
3351 the uid or gid is negative. A case of a negative gid caused this to be
3352 noticed. The fix allows for either to be negative.
3354 PH/35 ACL_WHERE_MIME is now declared unconditionally, to avoid too much code
3355 clutter, but the tables that are indexed by ACL_WHERE_xxx values had been
3358 PH/36 The change PH/12 above was broken. Fixed it.
3360 PH/37 Exim used to check for duplicate addresses in the middle of routing, on
3361 the grounds that routing the same address twice would always produce the
3362 same answer. This might have been true once, but it is certainly no
3363 longer true now. Routing a child address may depend on the previous
3364 routing that produced that child. Some complicated redirection strategies
3365 went wrong when messages had multiple recipients, and made Exim's
3366 behaviour dependent on the order in which the addresses were given.
3368 I have moved the duplicate checking until after the routing is complete.
3369 Exim scans the addresses that are assigned to local and remote
3370 transports, and removes any duplicates. This means that more work will be
3371 done, as duplicates will always all be routed, but duplicates are
3372 presumably rare, so I don't expect this is of any significance.
3374 For deliveries to pipes, files, and autoreplies, the duplicate checking
3375 still happens during the routing process, since they are not going to be
3378 PH/38 Installed a patch from Ian Freislich, with the agreement of Tom Kistner.
3379 It corrects a timeout issue with spamd. This is Ian's comment: "The
3380 background is that sometimes spamd either never reads data from a
3381 connection it has accepted, or it never writes response data. The exiscan
3382 spam.[ch] uses a 3600 second timeout on spamd socket reads, further, it
3383 blindly assumes that writes won't block so it may never time out."
3385 PH/39 Allow G after quota size as well as K and M.
3387 PH/40 The value set for $authenticated_id in an authenticator may not contain
3388 binary zeroes or newlines because the value is written to log lines and
3389 to spool files. There was no check on this. Now the value is run through
3390 the string_printing() function so that such characters are converted to
3391 printable escape sequences.
3393 PH/41 $message_linecount is a new variable that contains the total number of
3394 lines in the message. Compare $body_linecount, which is the count for the
3397 PH/42 Exim no longer gives details of delivery errors for specific addresses in
3398 bounce and delay warning messages, except in certain special cases, which
3401 (a) An SMTP error message from a remote host;
3402 (b) A message specified in a :fail: redirection;
3403 (c) A message specified in a "fail" command in a system filter;
3404 (d) A message specified in a FAIL return from the queryprogram router;
3405 (e) A message specified by the cannot_route_message router option.
3407 In these cases only, Exim does include the error details in bounce and
3408 warning messages. There are also a few cases where bland messages such
3409 as "unrouteable address" or "local delivery error" are given.
3411 PH/43 $value is now also set for the "else" part of a ${run expansion.
3413 PH/44 Applied patch from the Sieve maintainer: "The vacation draft is still
3414 being worked on, but at least Exim now implements the latest version to
3417 PH/45 In a pipe transport, although a timeout while waiting for the pipe
3418 process to complete was treated as a delivery failure, a timeout while
3419 writing the message to the pipe was logged, but erroneously treated as a
3420 successful delivery. Such timeouts include transport filter timeouts. For
3421 consistency with the overall process timeout, these timeouts are now
3422 treated as errors, giving rise to delivery failures by default. However,
3423 there is now a new Boolean option for the pipe transport called
3424 timeout_defer, which, if set TRUE, converts the failures into defers for
3425 both kinds of timeout. A transport filter timeout is now identified in
3428 PH/46 The "scripts/Configure-config.h" script calls "make" at one point. On
3429 systems where "make" and "gmake" are different, calling "gmake" at top
3430 level broke things. I've arranged for the value of $(MAKE) to be passed
3431 from the Makefile to this script so that it can call the same version of
3435 A note about Exim versions 4.44 and 4.50
3436 ----------------------------------------
3438 Exim 4.50 was meant to be the next release after 4.43. It contains a lot of
3439 changes of various kinds. As a consequence, a big documentation update was
3440 needed. This delayed the release for rather longer than seemed good, especially
3441 in the light of a couple of (minor) security issues. Therefore, the changes
3442 that fixed bugs were backported into 4.43, to create a 4.44 maintenance
3443 release. So 4.44 and 4.50 are in effect two different branches that both start
3446 I have left the 4.50 change log unchanged; it contains all the changes since
3447 4.43. The change log for 4.44 is below; many of its items are identical to
3448 those for 4.50. This seems to be the most sensible way to preserve the
3449 historical information.
3455 1. Minor wording change to the doc/README.SIEVE file.
3457 2. Change 4.43/35 introduced a bug: if quota_filecount was set, the
3458 computation of the current number of files was incorrect.
3460 3. Closing a stable door: arrange to panic-die if setitimer() ever fails. The
3461 bug fixed in 4.43/37 would have been diagnosed quickly if this had been in
3464 4. Give more explanation in the error message when the command for a transport
3465 filter fails to execute.
3467 5. There are several places where Exim runs a non-Exim command in a
3468 subprocess. The SIGUSR1 signal should be disabled for these processes. This
3469 was being done only for the command run by the queryprogram router. It is
3470 now done for all such subprocesses. The other cases are: ${run, transport
3471 filters, and the commands run by the lmtp and pipe transports.
3473 6. Added CONFIGURE_GROUP build-time option.
3475 7. Some older OS have a limit of 256 on the maximum number of file
3476 descriptors. Exim was using setrlimit() to set 1000 as a large value
3477 unlikely to be exceeded. Change 4.43/17 caused a lot of logging on these
3478 systems. I've change it so that if it can't get 1000, it tries for 256.
3480 8. "control=submission" was allowed, but had no effect, in a DATA ACL. This
3481 was an oversight, and furthermore, ever since the addition of extra
3482 controls (e.g. 4.43/32), the checks on when to allow different forms of
3483 "control" were broken. There should now be diagnostics for all cases when a
3484 control that does not make sense is encountered.
3486 9. Added the /retain_sender option to "control=submission".
3488 10. $recipients is now available in the predata ACL (oversight).
3490 11. Tidy the search cache before the fork to do a delivery from a message
3491 received from the command line. Otherwise the child will trigger a lookup
3492 failure and thereby defer the delivery if it tries to use (for example) a
3493 cached ldap connection that the parent has called unbind on.
3495 12. If verify=recipient was followed by verify=sender in a RCPT ACL, the value
3496 of $address_data from the recipient verification was clobbered by the
3497 sender verification.
3499 13. The value of address_data from a sender verification is now available in
3500 $sender_address_data in subsequent conditions in the ACL statement.
3502 14. Added forbid_sieve_filter and forbid_exim_filter to the redirect router.
3504 15. Added a new option "connect=<time>" to callout options, to set a different
3507 16. If FIXED_NEVER_USERS was defined, but empty, Exim was assuming the uid 0
3508 was its contents. (It was OK if the option was not defined at all.)
3510 17. A "Completed" log line is now written for messages that are removed from
3511 the spool by the -Mrm option.
3513 18. New variables $sender_verify_failure and $recipient_verify_failure contain
3514 information about exactly what failed.
3516 19. Added -dd to debug only the daemon process.
3518 20. Incorporated Michael Haardt's patch to ldap.c for improving the way it
3519 handles timeouts, both on the server side and network timeouts. Renamed the
3520 CONNECT parameter as NETTIMEOUT (but kept the old name for compatibility).
3522 21. The rare case of EHLO->STARTTLS->HELO was setting the protocol to "smtp".
3523 It is now set to "smtps".
3525 22. $host_address is now set to the target address during the checking of
3526 ignore_target_hosts.
3528 23. When checking ignore_target_hosts for an ipliteral router, no host name was
3529 being passed; this would have caused $sender_host_name to have been used if
3530 matching the list had actually called for a host name (not very likely,
3531 since this list is usually IP addresses). A host name is now passed as
3534 24. Changed the calls that set up the SIGCHLD handler in the daemon to use the
3535 code that specifies a non-restarting handler (typically sigaction() in
3536 modern systems) in an attempt to fix a rare and obscure crash bug.
3538 25. Narrowed the window for a race in the daemon that could cause it to ignore
3539 SIGCHLD signals. This is not a major problem, because they are used only to
3540 wake it up if nothing else does.
3542 26. A malformed maildirsize file could cause Exim to calculate negative values
3543 for the mailbox size or file count. Odd effects could occur as a result.
3544 The maildirsize information is now recalculated if the size or filecount
3547 27. Added HAVE_SYS_STATVFS_H to the os.h file for Linux, as it has had this
3548 support for a long time. Removed HAVE_SYS_VFS_H.
3550 28. Installed the latest version of exipick from John Jetmore.
3552 29. In an address list, if the pattern was not a regular expression, an empty
3553 subject address (from a bounce message) matched only if the pattern was an
3554 empty string. Non-empty patterns were not even tested. This was the wrong
3555 because it is perfectly reasonable to use an empty address as part of a
3556 database query. An empty address is now tested by patterns that are
3557 lookups. However, all the other forms of pattern expect the subject to
3558 contain a local part and a domain, and therefore, for them, an empty
3559 address still always fails if the pattern is not itself empty.
3561 30. Exim went into a mad DNS loop when attempting to do a callout where the
3562 host was specified on an smtp transport, and looking it up yielded more
3563 than one IP address.
3565 31. Re-factored the code for checking spool and log partition space into a
3566 function that finds that data and another that does the check. The former
3567 is then used to implement four new variables: $spool_space, $log_space,
3568 $spool_inodes, and $log_inodes.
3570 32. The RFC2047 encoding function was originally intended for short strings
3571 such as real names; it was not keeping to the 75-character limit for
3572 encoded words that the RFC imposes. It now respects the limit, and
3573 generates multiple encoded words if necessary. To be on the safe side, I
3574 have increased the buffer size for the ${rfc2047: expansion operator from
3577 33. It is now permitted to omit both strings after an "if" condition; if the
3578 condition is true, the result is "true". As before, when the second string
3579 is omitted, a false condition yields an empty string. This makes it less
3580 cumbersome to write custom ACL and router conditions.
3582 34. Failure to deliver a bounce message always caused it to be frozen, even if
3583 there was an errors_to setting on the router. The errors_to setting is now
3586 35. If an IPv6 address is given for -bh or -bhc, it is now converted to the
3587 canonical form (fully expanded) before being placed in
3588 $sender_host_address.
3590 36. The table in the code that translates DNS record types into text (T_A to
3591 "A" for instance) was missing entries for NS and CNAME. It is just possible
3592 that this could have caused confusion if both these types were looked up
3593 for the same domain, because the text type is used as part of Exim's
3594 per-process caching. But the chance of anyone hitting this buglet seems
3597 37. The dnsdb lookup has been extended in a number of ways.
3599 (1) There is a new type, "zns", which walks up the domain tree until it
3600 finds some nameserver records. It should be used with care.
3602 (2) There is a new type, "mxh", which is like "mx" except that it returns
3603 just the host names, not the priorities.
3605 (3) It is now possible to give a list of domains (or IP addresses) to be
3606 looked up. The behaviour when one of the lookups defers can be
3607 controlled by a keyword.
3609 (4) It is now possible to specify the separator character for use when
3610 multiple records are returned.
3612 38. The dnslists ACL condition has been extended: it is now possible to supply
3613 a list of IP addresses and/or domains to be looked up in a particular DNS
3616 39. Added log_selector=+queue_time_overall.
3618 40. When running the queue in the test harness, wait just a tad after forking a
3619 delivery process, to get repeatability of debugging output.
3621 41. Include certificate and key file names in error message when GnuTLS fails
3622 to set them up, because the GnuTLS error message doesn't include the name
3623 of the failing file when there is a problem reading it.
3625 42. Allow both -bf and -bF in the same test run.
3627 43. Did the same fix as 41 above for OpenSSL, which had the same infelicity.
3629 44. The "Exiscan patch" is now merged into the mainline Exim source.
3631 45. Sometimes the final signoff response after QUIT could fail to get
3632 transmitted in the non-TLS case. Testing !tls_active instead of tls_active
3633 < 0 before doing a fflush(). This bug looks as though it goes back to the
3634 introduction of TLS in release 3.20, but "sometimes" must have been rare
3635 because the tests only now provoked it.
3637 46. Reset the locale to "C" after calling embedded Perl, in case it was changed
3638 (this can affect the format of dates).
3640 47. exim_tidydb, when checking for the continued existence of a message for
3641 which it has found a message-specific retry record, was not finding
3642 messages that were in split spool directories. Consequently, it was
3643 deleting retry records that should have stayed in existence.
3645 48. Steve fixed some bugs in eximstats.
3647 49. The SPA authentication driver was not abandoning authentication and moving
3648 on to the next authenticator when an expansion was forced to fail,
3649 contradicting the general specification for all authenticators. Instead it
3650 was generating a temporary error. It now behaves as specified.
3652 50. The default ordering of permitted cipher suites for GnuTLS was pessimal
3653 (the order specifies the preference for clients). The order is now AES256,
3654 AES128, 3DES, ARCFOUR128.
3656 51. Small patch to Sieve code - explicitly set From: when generating an
3659 52. Exim crashed if a remote delivery caused a very long error message to be
3660 recorded - for instance if somebody sent an entire SpamAssassin report back
3661 as a large number of 550 error lines. This bug was coincidentally fixed by
3662 increasing the size of one of Exim's internal buffers (big_buffer) that
3663 happened as part of the Exiscan merge. However, to be on the safe side, I
3664 have made the code more robust (and fixed the comments that describe what
3667 53. Now that there can be additional text after "Completed" in log lines (if
3668 the queue_time_overall log selector is set), a one-byte patch to exigrep
3669 was needed to allow it to recognize "Completed" as not the last thing in
3672 54. The LDAP lookup was not handling a return of LDAP_RES_SEARCH_REFERENCE. A
3673 patch that reportedly fixes this has been added. I am not expert enough to
3674 create a test for it. This is what the patch creator wrote:
3676 "I found a little strange behaviour of ldap code when working with
3677 Windows 2003 AD Domain, where users was placed in more than one
3678 Organization Units. When I tried to give exim partial DN, the exit code
3679 of ldap_search was unknown to exim because of LDAP_RES_SEARCH_REFERENCE.
3680 But simultaneously result of request was absolutely normal ldap result,
3681 so I produce this patch..."
3683 Later: it seems that not all versions of LDAP support LDAP_RES_SEARCH_
3684 REFERENCE, so I have modified the code to exclude the patch when that macro
3687 55. Some experimental protocols are using DNS PTR records for new purposes. The
3688 keys for these records are domain names, not reversed IP addresses. The
3689 dnsdb PTR lookup now tests whether its key is an IP address. If not, it
3690 leaves it alone. Component reversal etc. now happens only for IP addresses.
3693 56. Improve error message when ldap_search() fails in OpenLDAP or Solaris LDAP.
3695 57. Double the size of the debug message buffer (to 2048) so that more of very
3696 long debug lines gets shown.
3698 58. The exicyclog utility now does better if the number of log files to keep
3699 exceeds 99. In this case, it numbers them 001, 002 ... instead of 01, 02...
3701 59. Two changes related to the smtp_active_hostname option:
3703 (1) $smtp_active_hostname is now available as a variable.
3704 (2) The default for smtp_banner uses $smtp_active_hostname instead
3705 of $primary_hostname.
3707 60. The host_aton() function is supposed to be passed a string that is known
3708 to be a valid IP address. However, in the case of IPv6 addresses, it was
3709 not checking this. This is a hostage to fortune. Exim now panics and dies
3710 if the condition is not met. A case was found where this could be provoked
3711 from a dnsdb PTR lookup with an IPv6 address that had more than 8
3712 components; fortuitously, this particular loophole had already been fixed
3713 by change 4.50/55 above.
3715 If there are any other similar loopholes, the new check in host_aton()
3716 itself should stop them being exploited. The report I received stated that
3717 data on the command line could provoke the exploit when Exim was running as
3718 exim, but did not say which command line option was involved. All I could
3719 find was the use of -be with a bad dnsdb PTR lookup, and in that case it is
3720 running as the user.
3723 61. There was a buffer overflow vulnerability in the SPA authentication code
3724 (which came originally from the Samba project). I have added a test to the
3725 spa_base64_to_bits() function which I hope fixes it.
3728 62. Configuration update for GNU/Hurd and variations. Updated Makefile-GNU and
3729 os.h-GNU, and added configuration files for GNUkFreeBSD and GNUkNetBSD.
3731 63. The daemon start-up calls getloadavg() while still root for those OS that
3732 need the first call to be done as root, but it missed one case: when
3733 deliver_queue_load_max is set with deliver_drop_privilege. This is
3734 necessary for the benefit of the queue runner, because there is no re-exec
3735 when deliver_drop_privilege is set.
3737 64. A call to exiwhat cut short delays set up by "delay" modifiers in ACLs.
3738 This has been fixed.
3740 65. Caching of lookup data for "hosts =" ACL conditions, when a named host list
3741 was in use, was not putting the data itself into the right store pool;
3742 consequently, it could be overwritten for a subsequent message in the same
3743 SMTP connection. (Fix 4.40/11 dealt with the non-cache case, but overlooked
3746 66. Added hosts_max_try_hardlimit to the smtp transport, default 50.
3748 67. The string_is_ip_address() function returns 0, 4, or 6, for "no an IP
3749 address", "IPv4 address", and "IPv6 address", respectively. Some calls of
3750 the function were treating the return as a boolean value, which happened to
3751 work because 0=false and not-0=true, but is not correct code.
3753 68. The host_aton() function was not handling scoped IPv6 addresses (those
3754 with, for example, "%eth0" on the end) correctly.
3756 69. Fixed some compiler warnings in acl.c for the bitmaps specified with
3757 negated items (that is, ~something) in unsigned ints. Some compilers
3758 apparently mutter when there is no cast.
3760 70. If an address verification called from an ACL failed, and did not produce a
3761 user-specific message (i.e. there was only a "system" message), nothing was
3762 put in $acl_verify_message. In this situation, it now puts the system
3765 71. Change 4.23/11 added synchronization checking at the start of an SMTP
3766 session; change 4.31/43 added the unwanted input to the log line - except
3767 that it did not do this in the start of session case. It now does.
3769 72. After a timeout in a callout SMTP session, Exim still sent a QUIT command.
3770 This is wrong and can cause the other end to generate a synchronization
3771 error if it is another Exim or anything else that does the synchronization
3772 check. A QUIT command is no longer sent after a timeout.
3774 73. $host_lookup_deferred has been added, to make it easier to detect DEFERs
3775 during host lookups.
3777 74. The defer_ok option of callout verification was not working if it was used
3778 when verifying addresses in header lines, that is, for this case:
3780 verify = header_sender/callout=defer_ok
3782 75. A backgrounded daemon closed stdin/stdout/stderr on entry; this meant that
3783 those file descriptors could be used for SMTP connections. If anything
3784 wrote to stderr (the example that came up was "warn" in embedded Perl), it
3785 could be sent to the SMTP client, causing chaos. The daemon now opens
3786 stdin, stdout, and stderr to /dev/null when it puts itself into the
3789 76. Arrange for output from Perl's "warn" command to be written to Exim's main
3790 log by default. The user can override this with suitable Perl magic.
3792 77. The use of log_message on a "discard" ACL verb, which is supposed to add to
3793 the log message when discard triggers, was not working for the DATA ACL or
3794 for the non-SMTP ACL.
3796 78. Error message wording change in sieve.c.
3798 79. If smtp_accept_max_per_host was set, the number of connections could be
3799 restricted to fewer than expected, because the daemon was trying to set up
3800 a new connection before checking whether the processes handling previous
3801 connections had finished. The check for completed processes is now done
3802 earlier. On busy systems, this bug wouldn't be noticed because something
3803 else would have woken the daemon, and it would have reaped the completed
3806 80. If a message was submitted locally by a user whose login name contained one
3807 or more spaces (ugh!), the spool file that Exim wrote was not re-readable.
3808 It caused a spool format error. I have fixed the spool reading code. A
3809 related problem was that the "from" clause in the Received: line became
3810 illegal because of the space(s). It is now covered by ${quote_local_part.
3812 81. Included the latest eximstats from Steve (adds average sizes to HTML Top
3815 82. Updated OS/Makefile-AIX as per message from Mike Meredith.
3817 83. Patch from Sieve maintainer to fix unterminated string problem in
3818 "vacation" handling.
3820 84. Some minor changes to the Linux configuration files to help with other
3821 OS variants using glibc.
3823 85. One more patch for Sieve to update vacation handling to latest spec.
3826 ----------------------------------------------------
3827 See the note above about the 4.44 and 4.50 releases.
3828 ----------------------------------------------------
3834 1. Change 4.43/35 introduced a bug that caused file counts to be
3835 incorrectly computed when quota_filecount was set in an appendfile
3838 2. Closing a stable door: arrange to panic-die if setitimer() ever fails. The
3839 bug fixed in 4.43/37 would have been diagnosed quickly if this had been in
3842 3. Give more explanation in the error message when the command for a transport
3843 filter fails to execute.
3845 4. There are several places where Exim runs a non-Exim command in a
3846 subprocess. The SIGUSR1 signal should be disabled for these processes. This
3847 was being done only for the command run by the queryprogram router. It is
3848 now done for all such subprocesses. The other cases are: ${run, transport
3849 filters, and the commands run by the lmtp and pipe transports.
3851 5. Some older OS have a limit of 256 on the maximum number of file
3852 descriptors. Exim was using setrlimit() to set 1000 as a large value
3853 unlikely to be exceeded. Change 4.43/17 caused a lot of logging on these
3854 systems. I've change it so that if it can't get 1000, it tries for 256.
3856 6. "control=submission" was allowed, but had no effect, in a DATA ACL. This
3857 was an oversight, and furthermore, ever since the addition of extra
3858 controls (e.g. 4.43/32), the checks on when to allow different forms of
3859 "control" were broken. There should now be diagnostics for all cases when a
3860 control that does not make sense is encountered.
3862 7. $recipients is now available in the predata ACL (oversight).
3864 8. Tidy the search cache before the fork to do a delivery from a message
3865 received from the command line. Otherwise the child will trigger a lookup
3866 failure and thereby defer the delivery if it tries to use (for example) a
3867 cached ldap connection that the parent has called unbind on.
3869 9. If verify=recipient was followed by verify=sender in a RCPT ACL, the value
3870 of $address_data from the recipient verification was clobbered by the
3871 sender verification.
3873 10. If FIXED_NEVER_USERS was defined, but empty, Exim was assuming the uid 0
3874 was its contents. (It was OK if the option was not defined at all.)
3876 11. A "Completed" log line is now written for messages that are removed from
3877 the spool by the -Mrm option.
3879 12. $host_address is now set to the target address during the checking of
3880 ignore_target_hosts.
3882 13. When checking ignore_target_hosts for an ipliteral router, no host name was
3883 being passed; this would have caused $sender_host_name to have been used if
3884 matching the list had actually called for a host name (not very likely,
3885 since this list is usually IP addresses). A host name is now passed as
3888 14. Changed the calls that set up the SIGCHLD handler in the daemon to use the
3889 code that specifies a non-restarting handler (typically sigaction() in
3890 modern systems) in an attempt to fix a rare and obscure crash bug.
3892 15. Narrowed the window for a race in the daemon that could cause it to ignore
3893 SIGCHLD signals. This is not a major problem, because they are used only to
3894 wake it up if nothing else does.
3896 16. A malformed maildirsize file could cause Exim to calculate negative values
3897 for the mailbox size or file count. Odd effects could occur as a result.
3898 The maildirsize information is now recalculated if the size or filecount
3901 17. Added HAVE_SYS_STATVFS_H to the os.h file for Linux, as it has had this
3902 support for a long time. Removed HAVE_SYS_VFS_H.
3904 18. Updated exipick to current release from John Jetmore.
3906 19. Allow an empty sender to be matched against a lookup in an address list.
3907 Previously the only cases considered were a regular expression, or an
3910 20. Exim went into a mad DNS lookup loop when doing a callout where the
3911 host was specified on the transport, if the DNS lookup yielded more than
3914 21. The RFC2047 encoding function was originally intended for short strings
3915 such as real names; it was not keeping to the 75-character limit for
3916 encoded words that the RFC imposes. It now respects the limit, and
3917 generates multiple encoded words if necessary. To be on the safe side, I
3918 have increased the buffer size for the ${rfc2047: expansion operator from
3921 22. Failure to deliver a bounce message always caused it to be frozen, even if
3922 there was an errors_to setting on the router. The errors_to setting is now
3925 23. If an IPv6 address is given for -bh or -bhc, it is now converted to the
3926 canonical form (fully expanded) before being placed in
3927 $sender_host_address.
3929 24. Updated eximstats to version 1.33
3931 25. Include certificate and key file names in error message when GnuTLS fails
3932 to set them up, because the GnuTLS error message doesn't include the name
3933 of the failing file when there is a problem reading it.
3935 26. Expand error message when OpenSSL has problems setting up cert/key files.
3938 27. Reset the locale to "C" after calling embedded Perl, in case it was changed
3939 (this can affect the format of dates).
3941 28. exim_tidydb, when checking for the continued existence of a message for
3942 which it has found a message-specific retry record, was not finding
3943 messages that were in split spool directories. Consequently, it was
3944 deleting retry records that should have stayed in existence.
3946 29. eximstats updated to version 1.35
3947 1.34 - allow eximstats to parse syslog lines as well as mainlog lines
3948 1.35 - bugfix such that pie charts by volume are generated correctly
3950 30. The SPA authentication driver was not abandoning authentication and moving
3951 on to the next authenticator when an expansion was forced to fail,
3952 contradicting the general specification for all authenticators. Instead it
3953 was generating a temporary error. It now behaves as specified.
3955 31. The default ordering of permitted cipher suites for GnuTLS was pessimal
3956 (the order specifies the preference for clients). The order is now AES256,
3957 AES128, 3DES, ARCFOUR128.
3959 31. Small patch to Sieve code - explicitly set From: when generating an
3962 32. Exim crashed if a remote delivery caused a very long error message to be
3963 recorded - for instance if somebody sent an entire SpamAssassin report back
3964 as a large number of 550 error lines. This bug was coincidentally fixed by
3965 increasing the size of one of Exim's internal buffers (big_buffer) that
3966 happened as part of the Exiscan merge. However, to be on the safe side, I
3967 have made the code more robust (and fixed the comments that describe what
3970 33. Some experimental protocols are using DNS PTR records for new purposes. The
3971 keys for these records are domain names, not reversed IP addresses. The
3972 dnsdb PTR lookup now tests whether its key is an IP address. If not, it
3973 leaves it alone. Component reversal etc. now happens only for IP addresses.
3976 34. The host_aton() function is supposed to be passed a string that is known
3977 to be a valid IP address. However, in the case of IPv6 addresses, it was
3978 not checking this. This is a hostage to fortune. Exim now panics and dies
3979 if the condition is not met. A case was found where this could be provoked
3980 from a dnsdb PTR lookup with an IPv6 address that had more than 8
3981 components; fortuitously, this particular loophole had already been fixed
3982 by change 4.50/55 or 4.44/33 above.
3984 If there are any other similar loopholes, the new check in host_aton()
3985 itself should stop them being exploited. The report I received stated that
3986 data on the command line could provoke the exploit when Exim was running as
3987 exim, but did not say which command line option was involved. All I could
3988 find was the use of -be with a bad dnsdb PTR lookup, and in that case it is
3989 running as the user.
3992 35. There was a buffer overflow vulnerability in the SPA authentication code
3993 (which came originally from the Samba project). I have added a test to the
3994 spa_base64_to_bits() function which I hope fixes it.
3997 36. The daemon start-up calls getloadavg() while still root for those OS that
3998 need the first call to be done as root, but it missed one case: when
3999 deliver_queue_load_max is set with deliver_drop_privilege. This is
4000 necessary for the benefit of the queue runner, because there is no re-exec
4001 when deliver_drop_privilege is set.
4003 37. Caching of lookup data for "hosts =" ACL conditions, when a named host list
4004 was in use, was not putting the data itself into the right store pool;
4005 consequently, it could be overwritten for a subsequent message in the same
4006 SMTP connection. (Fix 4.40/11 dealt with the non-cache case, but overlooked
4009 38. Sometimes the final signoff response after QUIT could fail to get
4010 transmitted in the non-TLS case. Testing !tls_active instead of tls_active
4011 < 0 before doing a fflush(). This bug looks as though it goes back to the
4012 introduction of TLS in release 3.20, but "sometimes" must have been rare
4013 because the tests only now provoked it.
4019 1. Fixed a longstanding but relatively impotent bug: a long time ago, before
4020 PIPELINING, the function smtp_write_command() used to return TRUE or FALSE.
4021 Now it returns an integer. A number of calls were still expecting a T/F
4022 return. Fortuitously, in all cases, the tests worked in OK situations,
4023 which is the norm. However, things would have gone wrong on any write
4024 failures on the smtp file descriptor. This function is used when sending
4025 messages over SMTP and also when doing verify callouts.
4027 2. When Exim is called to do synchronous delivery of a locally submitted
4028 message (the -odf or -odi options), it no longer closes stderr before doing
4031 3. Implemented the mua_wrapper option.
4033 4. Implemented mx_fail_domains and srv_fail_domains for the dnslookup router.
4035 5. Implemented the functions header_remove(), header_testname(),
4036 header_add_at_position(), and receive_remove_recipient(), and exported them
4039 6. If an ACL "warn" statement specified the addition of headers, Exim already
4040 inserted X-ACL-Warn: at the start if there was no header name. However, it
4041 was not making this test for the second and subsequent header lines if
4042 there were newlines in the string. This meant that an invalid header could
4043 be inserted if Exim was badly configured.
4045 7. Allow an ACL "warn" statement to add header lines at the start or after all
4046 the Received: headers, as well as at the end.
4048 8. Added the rcpt_4xx retry error code.
4050 9. Added postmaster_mailfrom=xxx to callout verification option.
4052 10. Added mailfrom=xxxx to the callout verification option, for verify=
4055 11. ${substr_1_:xxxx} and ${substr__3:xxxx} are now diagnosed as syntax errors
4056 (they previously behaved as ${substr_1_0:xxxx} and ${substr:_0_3:xxxx}).
4058 12. Inserted some casts to stop certain compilers warning when using pointer
4059 differences as field lengths or precisions in printf-type calls (mostly
4060 affecting debugging statements).
4062 13. Added optional readline() support for -be (dynamically loaded).
4064 14. Obscure bug fix: if a message error (e.g. 4xx to MAIL) happened within the
4065 same clock tick as a message's arrival, so that its received time was the
4066 same as the "first fail" time on the retry record, and that message
4067 remained on the queue past the ultimate address timeout, every queue runner
4068 would try a delivery (because it was past the ultimate address timeout) but
4069 after another failure, the ultimate address timeout, which should have then
4070 bounced the address, did not kick in. This was a "< instead of <=" error;
4071 in most cases the first failure would have been in the next clock tick
4072 after the received time, and all would be well.
4074 15. The special items beginning with @ in domain lists (e.g. @mx_any) were not
4075 being recognized when the domain list was tested by the match_domain
4076 condition in an expansion string.
4078 16. Added the ${str2b64: operator.
4080 17. Exim was always calling setrlimit() to set a large limit for the number of
4081 processes, without checking whether the existing limit was already
4082 adequate. (It did check for the limit on file descriptors.) Furthermore,
4083 errors from getrlimit() and setrlimit() were being ignored. Now they are
4084 logged to the main and panic logs, but Exim does carry on, to try to do its
4085 job under whatever limits there are.
4087 18. Imported PCRE 5.0.
4089 19. Trivial typo in log message " temporarily refused connection" (the leading
4092 20. If the log selector return_path_on_delivery was set and an address was
4093 redirected to /dev/null, the delivery process crashed because it assumed
4094 that a return path would always be set for a "successful" delivery. In this
4095 case, the whole delivery is bypassed as an optimization, and therefore no
4098 21. Internal re-arrangement: the function for sending a challenge and reading
4099 a response while authentication was assuming a zero-terminated challenge
4100 string. It's now changed to take a pointer and a length, to allow for
4101 binary data in such strings.
4103 22. Added the cyrus_sasl authenticator (code supplied by MBM).
4105 23. Exim was not respecting finduser_retries when seeking the login of the
4106 uid under which it was called; it was always trying 10 times. (The default
4107 setting of finduser_retries is zero.) Also, it was sleeping after the final
4108 failure, which is pointless.
4110 24. Implemented tls_on_connect_ports.
4112 25. Implemented acl_smtp_predata.
4114 26. If the domain in control=submission is set empty, Exim assumes that the
4115 authenticated id is a complete email address when it generates From: or
4116 Sender: header lines.
4118 27. Added "#define SOCKLEN_T int" to OS/os.h-SCO and OS/os.h-SCO_SV. Also added
4119 definitions to OS/Makefile-SCO and OS/Makefile-SCO_SV that put basename,
4120 chown and chgrp in /bin and hostname in /usr/bin.
4122 28. Exim was keeping the "process log" file open after each use, just as it
4123 does for the main log. This opens the possibility of it remaining open for
4124 long periods when the USR1 signal hits a daemon. Occasional processlog
4125 errors were reported, that could have been caused by this. Anyway, it seems
4126 much more sensible not to leave this file open at all, so that is what now
4129 29. The long-running daemon process does not normally write to the log once it
4130 has entered its main loop, and it closes the log before doing so. This is
4131 so that log files can straightforwardly be renamed and moved. However,
4132 there are a couple of unusual error situations where the daemon does write
4133 log entries, and I had neglected to close the log afterwards.
4135 30. The text of an SMTP error response that was received during a remote
4136 delivery was being truncated at 512 bytes. This is too short for some of
4137 the long messages that one sometimes sees. I've increased the limit to
4140 31. It is now possible to make retry rules that apply only when a message has a
4141 specific sender, in particular, an empty sender.
4143 32. Added "control = enforce_sync" and "control = no_enforce_sync". This makes
4144 it possible to be selective about when SMTP synchronization is enforced.
4146 33. Added "control = caseful_local_part" and "control = "caselower_local_part".
4148 32. Implemented hosts_connection_nolog.
4150 33. Added an ACL for QUIT.
4152 34. Setting "delay_warning=" to disable warnings was not working; it gave a
4155 35. Added mailbox_size and mailbox_filecount to appendfile.
4157 36. Added control = no_multiline_responses to ACLs.
4159 37. There was a bug in the logic of the code that waits for the clock to tick
4160 in the case where the clock went backwards by a substantial amount such
4161 that the microsecond fraction of "now" was more than the microsecond
4162 fraction of "then" (but the whole seconds number was less).
4164 38. Added support for the libradius Radius client library this is found on
4165 FreeBSD (previously only the radiusclient library was supported).
4171 1. When certain lookups returned multiple values in the form name=value, the
4172 quoting of the values was not always being done properly. Specifically:
4173 (a) If the value started with a double quote, but contained no whitespace,
4175 (b) If the value contained whitespace other than a space character (i.e.
4176 tabs or newlines or carriage returns) it was not quoted.
4177 This fix has been applied to the mysql and pgsql lookups by writing a
4178 separate quoting function and calling it from the lookup code. The fix
4179 should probably also be applied to nisplus, ibase and oracle lookups, but
4180 since I cannot test any of those, I have not disturbed their existing code.
4182 2. A hit in the callout cache for a specific address caused a log line with no
4183 reason for rejecting RCPT. Now it says "Previous (cached) callout
4184 verification failure".
4186 3. There was an off-by-one bug in the queryprogram router. An over-long
4187 return line was truncated at 256 instead of 255 characters, thereby
4188 overflowing its buffer with the terminating zero. As well as fixing this, I
4189 have increased the buffer size to 1024 (and made a note to document this).
4191 4. If an interrupt, such as the USR1 signal that is send by exiwhat, arrives
4192 when Exim is waiting for an SMTP response from a remote server, Exim
4193 restarts its select() call on the socket, thereby resetting its timeout.
4194 This is not a problem when such interrupts are rare. Somebody set up a cron
4195 job to run exiwhat every 2 minutes, which is less than the normal select()
4196 timeout (5 or 10 minutes). This meant that the select() timeout never
4197 kicked in because it was always reset. I have fixed this by comparing the
4198 time when an interrupt arrives with the time at the start of the first call
4199 to select(). If more time than the timeout has elapsed, the interrupt is
4200 treated as a timeout.
4202 5. Some internal re-factoring in preparation for the addition of Sieve
4203 extensions (by MH). In particular, the "personal" test is moved to a
4204 separate function, and given an option for scanning Cc: and Bcc: (which is
4205 not set for Exim filters).
4207 6. When Exim created an email address using the login of the caller as the
4208 local part (e.g. when creating a From: or Sender: header line), it was not
4209 quoting the local part when it contained special characters such as @.
4211 7. Installed new OpenBSD configuration files.
4213 8. Reworded some messages for syntax errors in "and" and "or" conditions to
4214 try to make them clearer.
4216 9. Callout options, other than the timeout value, were being ignored when
4217 verifying sender addresses in header lines. For example, when using
4219 verify = header_sender/callout=no_cache
4221 the cache was (incorrectly) being used.
4223 10. Added a missing instance of ${EXE} to the exim_install script; this affects
4224 only the Cygwin environment.
4226 11. When return_path_on_delivery was set as a log selector, if different remote
4227 addresses in the same message used different return paths and parallel
4228 remote delivery occurred, the wrong values would sometimes be logged.
4229 (Whenever a remote delivery process finished, the return path value from
4230 the most recently started remote delivery process was logged.)
4232 12. RFC 3848 specifies standard names for the "with" phrase in Received: header
4233 lines when AUTH and/or TLS are in use. This is the "received protocol"
4234 field. Exim used to use "asmtp" for authenticated SMTP, without any
4235 indication (in the protocol name) for TLS use. Now it follows the RFC and
4236 uses "esmtpa" if the connection is authenticated, "esmtps" if it is
4237 encrypted, and "esmtpsa" if it is both encrypted and authenticated. These
4238 names appear in log lines as well as in Received: header lines.
4240 13. Installed MH's patches for Sieve to add the "copy" and "vacation"
4241 extensions, and comparison tests, and to fix some bugs.
4243 14. Changes to the "personal" filter test:
4245 (1) The test was buggy in that it was just doing the equivalent of
4246 "contains" tests on header lines. For example, if a user's address was
4247 anne@some.where, the "personal" test would incorrectly be true for
4249 To: susanne@some.where
4251 This test is now done by extracting each address from the header in turn,
4252 and checking the entire address. Other tests that are part of "personal"
4253 are now done using regular expressions (for example, to check local parts
4254 of addresses in From: header lines).
4256 (2) The list of non-personal local parts in From: addresses has been
4257 extended to include "listserv", "majordomo", "*-request", and "owner-*",
4258 taken from the Sieve specification recommendations.
4260 (3) If the message contains any header line starting with "List-" it is
4261 treated as non-personal.
4263 (4) The test for "circular" in the Subject: header line has been removed
4264 because it now seems ill-conceived.
4266 15. Minor typos in src/EDITME comments corrected.
4268 16. Installed latest exipick from John Jetmore.
4270 17. If headers_add on a router specified a text string that was too long for
4271 string_sprintf() - that is, longer than 8192 bytes - Exim panicked. The use
4272 of string_sprintf() is now avoided.
4274 18. $message_body_size was not set (it was always zero) when running the DATA
4275 ACL and the local_scan() function.
4277 19. For the "mail" command in an Exim filter, no default was being set for
4278 the once_repeat time, causing a random time value to be used if "once" was
4279 specified. (If the value happened to be <= 0, no repeat happened.) The
4280 default is now 0s, meaning "never repeat". The "vacation" command was OK
4281 (its default is 7d). It's somewhat surprising nobody ever noticed this bug
4282 (I found it when inspecting the code).
4284 20. There is now an overall timeout for performing a callout verification. It
4285 defaults to 4 times the callout timeout, which applies to individual SMTP
4286 commands during the callout. The overall timeout applies when there is more
4287 than one host that can be tried. The timeout is checked before trying the
4288 next host. This prevents very long delays if there are a large number of
4289 hosts and all are timing out (e.g. when the network connections are timing
4290 out). The value of the overall timeout can be changed by specifying an
4291 additional sub-option for "callout", called "maxwait". For example:
4293 verify = sender/callout=5s,maxwait=20s
4295 21. Add O_APPEND to the open() call for maildirsize files (Exim already seeks
4296 to the end before writing, but this should make it even safer).
4298 22. Exim was forgetting that it had advertised PIPELINING for the second and
4299 subsequent messages on an SMTP connection. It was also not resetting its
4300 memory on STARTTLS and an internal HELO.
4302 23. When Exim logs an SMTP synchronization error within a session, it now
4303 records whether PIPELINING has been advertised or not.
4305 24. Added 3 instances of "(long int)" casts to time_t variables that were being
4306 formatted using %ld, because on OpenBSD (and perhaps others), time_t is int
4307 rather than long int.
4309 25. Installed the latest Cygwin configuration files from the Cygwin maintainer.
4311 26. Added the never_mail option to autoreply.
4317 1. A reorganization of the code in order to implement 4.40/8 caused a daemon
4318 crash if the getsockname() call failed; this can happen if a connection is
4319 closed very soon after it is established. The problem was simply in the
4320 order in which certain operations were done, causing Exim to try to write
4321 to the SMTP stream before it had set up the file descriptor. The bug has
4322 been fixed by making things happen in the correct order.
4328 1. If "drop" was used in a DATA ACL, the SMTP output buffer was not flushed
4329 before the connection was closed, thus losing the rejection response.
4331 2. Commented out the definition of SOCKLEN_T in os.h-SunOS5. It is needed for
4332 some early Solaris releases, but causes trouble in current releases where
4333 socklen_t is defined.
4335 3. When std{in,out,err} are closed, re-open them to /dev/null so that they
4338 4. Minor refactoring of os.c-Linux to avoid compiler warning when IPv6 is not
4341 5. Refactoring in expand.c to improve memory usage. Pre-allocate a block so
4342 that releasing the top of it at the end releases what was used for sub-
4343 expansions (unless the block got too big). However, discard this block if
4344 the first thing is a variable or header, so that we can use its block when
4345 it is dynamic (useful for very large $message_headers, for example).
4347 6. Lookups now cache *every* query, not just the most recent. A new, separate
4348 store pool is used for this. It can be recovered when all lookup caches are
4349 flushed. Lookups now release memory at the end of their result strings.
4350 This has involved some general refactoring of the lookup sources.
4352 7. Some code has been added to the store_xxx() functions to reduce the amount
4353 of flapping under certain conditions.
4355 8. log_incoming_interface used to affect only the <= reception log lines. Now
4356 it causes the local interface and port to be added to several more SMTP log
4357 lines, for example "SMTP connection from", and rejection lines.
4359 9. The Sieve author supplied some patches for the doc/README.SIEVE file.
4361 10. Added a conditional definition of _BSD_SOCKLEN_T to os.h-Darwin.
4363 11. If $host_data was set by virtue of a hosts lookup in an ACL, its value
4364 could be overwritten at the end of the current message (or the start of a
4365 new message if it was set in a HELO ACL). The value is now preserved for
4366 the duration of the SMTP connection.
4368 12. If a transport had a headers_rewrite setting, and a matching header line
4369 contained an unqualified address, that address was qualified, even if it
4370 did not match any rewriting rules. The underlying bug was that the values
4371 of the flags that permit the existence of unqualified sender and recipient
4372 addresses in header lines (set by {sender,recipient}_unqualified_hosts for
4373 non-local messages, and by -bnq for local messages) were not being
4374 preserved with the message after it was received.
4376 13. When Exim was logging an SMTP synchronization error, it could sometimes log
4377 "next input=" as part of the text comprising the host identity instead of
4378 the correct text. The code was using the same buffer for two different
4379 strings. However, depending on which order the printing function evaluated
4380 its arguments, the bug did not always show up. Under Linux, for example, my
4381 test suite worked just fine.
4383 14. Exigrep contained a use of Perl's "our" scoping after change 4.31/70. This
4384 doesn't work with some older versions of Perl. It has been changed to "my",
4385 which in any case is probably the better facility to use.
4387 15. A really picky compiler found some instances of statements for creating
4388 error messages that either had too many or two few arguments for the format
4391 16. The size of the buffer for calls to the DNS resolver has been increased
4392 from 1024 to 2048. A larger buffer is needed when performing PTR lookups
4393 for addresses that have a lot of PTR records. This alleviates a problem; it
4394 does not fully solve it.
4396 17. A dnsdb lookup for PTR records that receives more data than will fit in the
4397 buffer now truncates the list and logs the incident, which is the same
4398 action as happens when Exim is looking up a host name and its aliases.
4399 Previously in this situation something unpredictable would happen;
4400 sometimes it was "internal error: store_reset failed".
4402 18. If a server dropped the connection unexpectedly when an Exim client was
4403 using GnuTLS and trying to read a response, the client delivery process
4404 crashed while trying to generate an error log message.
4406 19. If a "warn" verb in an ACL added multiple headers to a message in a single
4407 string, for example:
4409 warn message = H1: something\nH2: something
4411 the text was added as a single header line from Exim's point of view
4412 though it ended up OK in the delivered message. However, searching for the
4413 second and subsequent header lines using $h_h2: did not work. This has been
4414 fixed. Similarly, if a system filter added multiple headers in this way,
4415 the routers could not see them.
4417 20. Expanded the error message when iplsearch is called with an invalid key to
4418 suggest using net-iplsearch in a host list.
4420 21. When running tests using -bh, any delays imposed by "delay" modifiers in
4421 ACLs are no longer actually imposed (and a message to that effect is
4424 22. If a "gecos" field in a passwd entry contained escaped characters, in
4425 particular, if it contained a \" sequence, Exim got it wrong when building
4426 a From: or a Sender: header from that name. A second bug also caused
4427 incorrect handling when an unquoted " was present following a character
4428 that needed quoting.
4430 23. "{crypt}" as a password encryption mechanism for a "crypteq" expansion item
4431 was not being matched caselessly.
4433 24. Arranged for all hyphens in the exim.8 source to be escaped with
4436 25. Change 16 of 4.32, which reversed 71 or 4.31 didn't quite do the job
4437 properly. Recipient callout cache records were still being keyed to include
4438 the sender, even when use_sender was set false. This led to far more
4439 callouts that were necessary. The sender is no longer included in the key
4440 when use_sender is false.
4442 26. Added "control = submission" modifier to ACLs.
4444 27. Added the ${base62d: operator to decode base 62 numbers.
4446 28. dnsdb lookups can now access SRV records.
4448 29. CONFIGURE_OWNER can be set at build time to define an alternative owner for
4449 the configuration file.
4451 30. The debug message "delivering xxxxxx-xxxxxx-xx" is now output in verbose
4452 (-v) mode. This makes the output for a verbose queue run more intelligible.
4454 31. Added a use_postmaster feature to recipient callouts.
4456 32. Added the $body_zerocount variable, containing the number of binary zero
4457 bytes in the message body.
4459 33. The time of last modification of the "new" subdirectory is now used as the
4460 "mailbox time last read" when there is a quota error for a maildir
4463 34. Added string comparison operators lt, lti, le, lei, gt, gti, ge, gei.
4465 35. Added +ignore_unknown as a special item in host lists.
4467 36. Code for decoding IPv6 addresses in host lists is now included, even if
4468 IPv6 support is not being compiled. This fixes a bug in which an IPv6
4469 address was recognized as an IP address, but was then not correctly decoded
4470 into binary, causing unexpected and incorrect effects when compared with
4477 1. Very minor rewording of debugging text in manualroute to say "list of
4478 hosts" instead of "hostlist".
4480 2. If verify=header_syntax was set, and a header line with an unqualified
4481 address (no domain) and a large number of spaces between the end of the
4482 name and the colon was received, the reception process suffered a buffer
4483 overflow, and (when I tested it) crashed. This was caused by some obsolete
4484 code that should have been removed. The fix is to remove it!
4486 3. When running in the test harness, delay a bit after writing a bounce
4487 message to get a bit more predictability in the log output.
4489 4. Added a call to search_tidyup() just before forking a reception process. In
4490 theory, someone could use a lookup in the expansion of smtp_accept_max_
4491 per_host which, without the tidyup, could leave open a database connection.
4493 5. Added the variables $recipient_data and $sender_data which get set from a
4494 lookup success in an ACL "recipients" or "senders" condition, or a router
4495 "senders" option, similar to $domain_data and $local_part_data.
4497 6. Moved the writing of debug_print from before to after the "senders" test
4500 7. Change 4.31/66 (moving the time when the Received: is generated) caused
4501 problems for message scanning, either using a data ACL, or using
4502 local_scan() because the Received: header was not generated till after they
4503 were called (in order to set the time as the time of reception completion).
4504 I have revised the way this works. The header is now generated after the
4505 body is received, but before the ACL or local_scan() are called. After they
4506 are run, the timestamp in the header is updated.
4512 1. Change 4.24/6 introduced a bug because the SIGALRM handler was disabled
4513 before starting a queue runner without re-exec. This happened only when
4514 deliver_drop_privilege was set or when the Exim user was set to root. The
4515 effect of the bug was that timeouts during subsequent deliveries caused
4516 crashes instead of being properly handled. The handler is now left at its
4517 default (and expected) setting.
4519 2. The other case in which a daemon avoids a re-exec is to deliver an incoming
4520 message, again when deliver_drop_privilege is set or Exim is run as root.
4521 The bug described in (1) was not present in this case, but the tidying up
4522 of the other signals was missing. I have made the two cases consistent.
4524 3. The ignore_target_hosts setting on a manualroute router was being ignored
4525 for hosts that were looked up using the /MX notation.
4527 4. Added /ignore=<ip list> feature to @mx_any, @mx_primary, and @mx_secondary
4530 5. Change 4.31/55 was buggy, and broke when there was a rewriting rule that
4531 operated on the sender address. After changing the $sender_address to <>
4532 for the sender address verify, Exim was re-instated it as the original
4533 (before rewriting) address, but remembering that it had rewritten it, so it
4534 wasn't rewriting it again. This bug also had the effect of breaking the
4535 sender address verification caching when the sender address was rewritten.
4537 6. The ignore_target_hosts option was being ignored by the ipliteral router.
4538 This has been changed so that if the ip literal address matches
4539 ignore_target_hosts, the router declines.
4541 7. Added expansion conditions match_domain, match_address, and match_local_
4542 part (NOT match_host).
4544 8. The placeholder for the Received: header didn't have a length field set.
4546 9. Added code to Exim itself and to exim_lock to test for a specific race
4547 condition that could lead to file corruption when using MBX delivery. The
4548 issue is with the lockfile that is created in /tmp. If this file is removed
4549 after a process has opened it but before that process has acquired a lock,
4550 there is the potential for a second process to recreate the file and also
4551 acquire a lock. This could lead to two Exim processes writing to the file
4552 at the same time. The added code performs the same test as UW imapd; it
4553 checks after acquiring the lock that its file descriptor still refers to
4554 the same named file.
4556 10. The buffer for building added header lines was of fixed size, 8192 bytes.
4557 It is now parameterized by HEADER_ADD_BUFFER_SIZE and this can be adjusted
4560 11. Added the smtp_active_hostname option. If used, this will typically be made
4561 to depend on the incoming interface address. Because $interface_address is
4562 not set up until the daemon has forked a reception process, error responses
4563 that can happen earlier (such as "too many connections") no longer contain
4566 12. If an expansion in a condition on a "warn" statement fails because a lookup
4567 defers, the "warn" statement is abandoned, and the next ACL statement is
4568 processed. Previously this caused the whole ACL to be aborted.
4570 13. Added the iplsearch lookup type.
4572 14. Added ident_timeout as a log selector.
4574 15. Added tls_certificate_verified as a log selector.
4576 16. Added a global option tls_require_ciphers (compare the smtp transport
4577 option of the same name). This controls incoming TLS connections.
4579 17. I finally figured out how to make tls_require_ciphers do a similar thing
4580 in GNUtls to what it does in OpenSSL, that is, set up an appropriate list
4581 before starting the TLS session.
4583 18. Tabs are now shown as \t in -bP output.
4585 19. If the log selector return_path_on_delivery was set, Exim crashed when
4586 bouncing a message because it had too many Received: header lines.
4588 20. If two routers both had headers_remove settings, and the first one included
4589 a superfluous trailing colon, the final name in the first list and the
4590 first name in the second list were incorrectly joined into one item (with a
4591 colon in the middle).
4597 1. Added -C and -D options to the exinext utility, mainly to make it easier
4598 to include in the automated testing, but these could be helpful when
4599 multiple configurations are in use.
4601 2. The exinext utility was not formatting the output nicely when there was
4602 an alternate port involved in the retry record key, nor when there was a
4603 message id as well (for retries that were specific to a specific message
4604 and a specific host). It was also confused by IPv6 addresses, because of
4605 the additional colons they contain. I have fixed the IPv4 problem, and
4606 patched it up to do a reasonable job for IPv6.
4608 3. When there is an error after a MAIL, RCPT, or DATA SMTP command during
4609 delivery, the log line now contains "pipelined" if PIPELINING was used.
4611 4. An SMTP transport process used to panic and die if the bind() call to set
4612 an explicit outgoing interface failed. This has been changed; it is now
4613 treated in the same way as a connect() failure.
4615 5. A reference to $sender_host_name in the part of a conditional expansion
4616 that was being skipped was still causing a DNS lookup. This no longer
4619 6. The def: expansion condition was not recognizing references to header lines
4620 that used bh_ and bheader_.
4622 7. Added the _cache feature to named lists.
4624 8. The code for checking quota_filecount in the appendfile transport was
4625 allowing one more file than it should have been.
4627 9. For compatibility with Sendmail, the command line option
4635 and sets the incoming protocol and host name (for trusted callers). The
4636 host name and its colon can be omitted when only the protocol is to be set.
4637 Note the Exim already has two private options, -pd and -ps, that refer to
4638 embedded Perl. It is therefore impossible to set a protocol value of "d" or
4639 "s", but I don't think that's a major issue.
4641 10. A number of refactoring changes to the code, none of which should affect
4644 (a) The number of logging options was getting close to filling up the
4645 32-bit word that was used as a bit map. I have split them into two classes:
4646 those that are passed in the argument to log_write(), and those that are
4647 only ever tested independently outside of that function. These are now in
4648 separate 32-bit words, so there is plenty of room for expansion again.
4649 There is no change in the user interface or the logging behaviour.
4651 (b) When building, for example, log lines, the code previously used a
4652 macro that called string_cat() twice, in order to add two strings. This is
4653 not really sufficiently general. Furthermore, there was one instance where
4654 it was actually wrong because one of the argument was used twice, and in
4655 one call a function was used. (As it happened, calling the function twice
4656 did not affect the overall behaviour.) The macro has been replaced by a
4657 function that can join an arbitrary number of extra strings onto a growing
4660 (c) The code for expansion conditions now uses a table and a binary chop
4661 instead of a serial search (which was left over from when there were very
4662 few conditions). Also, it now recognizes conditions like "pam" even when
4663 the relevant support is not compiled in: a suitably worded error message is
4664 given if an attempt is made to use such a condition.
4666 11. Added ${time_interval:xxxxx}.
4668 12. A bug was causing one of the ddress fields not to be passed back correctly
4669 from remote delivery subprocesses. The field in question was not being
4670 subsequently used, so this caused to problems in practice.
4672 13. Added new log selectors queue_time and deliver_time.
4674 14. Might have fixed a bug in maildirsizefile handling that threw up
4675 "unexpected character" debug warnings, and recalculated the data
4676 unnecessarily. In any case, I expanded the warning message to give more
4679 15. Added the message "Restricted characters in address" to the statements in
4680 the default ACL that block characters like @ and % in local parts.
4682 16. Change 71 for release 4.31 proved to be much less benign that I imagined.
4683 Three changes have been made:
4685 (a) There was a serious bug; a negative response to MAIL caused the whole
4686 recipient domain to be cached as invalid, thereby blocking all messages
4687 to all local parts at the same domain, from all senders. This bug has
4688 been fixed. The domain is no longer cached after a negative response to
4689 MAIL if the sender used is not empty.
4691 (b) The default behaviour of using MAIL FROM:<> for recipient callouts has
4694 (c) A new callout option, "use_sender" has been added for people who want
4695 the modified behaviour.
4701 1. Removed "EXTRALIBS=-lwrap" from OS/Makefile-Unixware7 on the advice of
4704 2. Removed "LIBS = -lresolv" from OS/Makefile-Darwin as it is not needed, and
4705 indeed breaks things for older releases.
4707 3. Added additional logging to the case where there is a problem reading data
4708 from a filter that is running in a subprocess using a pipe, in order to
4709 try to track down a specific problem.
4711 4. Testing facility fudge: when running in the test harness and attempting
4712 to connect to 10.x.x.x (expecting a connection timeout) I'm now sometimes
4713 getting "No route to host". Convert this to a timeout.
4715 5. Define ICONV_ARG2_TYPE as "char **" for Unixware7 to avoid compiler
4718 6. Some OS don't have socklen_t but use size_t instead. This affects the
4719 fifth argument of getsockopt() amongst other things. This is now
4720 configurable by a macro called SOCKLEN_T which defaults to socklen_t, but
4721 can be set for individual OS. I have set it for SunOS5, OSF1, and
4722 Unixware7. Current versions of SunOS5 (aka Solaris) do have socklen_t, but
4723 some earlier ones do not.
4725 7. Change 4.30/15 was not doing the test caselessly.
4727 8. The standard form for an IPv6 address literal was being rejected by address
4728 parsing in, for example, MAIL and RCPT commands. An example of this kind of
4729 address is [IPv6:2002:c1ed:8229:10:202:2dff:fe07:a42a]. Exim now accepts
4730 this, as well as the form without the "IPv6" on the front (but only when
4731 address literals are enabled, of course).
4733 9. Added some casts to avoid compiler warnings in OS/os.c-Linux.
4735 10. Exim crashed if a message with an empty sender address specified by -f
4736 encountered a router with an errors_to setting. This could be provoked only
4737 by a command such as
4741 where an empty string was supplied; "<>" did not hit this bug.
4743 11. Installed PCRE release 4.5.
4745 12. If EHLO/HELO was rejected by an ACL, the value of $sender_helo_name
4746 remained set. It is now erased.
4748 13. exiqgrep wasn't working on MacOS X because it didn't correctly compute
4749 times from message ids (which are base 36 rather than the normal 62).
4751 14. "Expected" SMTP protocol errors that can arise when PIPELINING is in use
4752 were being counted as actual protocol errors, and logged if the log
4753 selector +smtp_protocol_error was set. One cannot be perfect in this test,
4754 but now, if PIPELINING has been advertised, RCPT following a rejected MAIL,
4755 and DATA following a set of rejected RCPTs do not count as protocol errors.
4756 In other words, Exim assumes they were pipelined, though this may not
4757 actually be the case. Of course, in all cases the client gets an
4758 appropriate error code.
4760 15. If a lookup fails in an ACL condition, a message about the failure may
4761 be available; it is used if testing the ACL cannot continue, because most
4762 such messages specify what the cause of the deferral is. However, some
4763 messages (e.g. "MYSQL: no data found") do not cause a defer. There was bug
4764 that caused an old message to be retained and used if a later statement
4765 caused a defer, replacing the real cause of the deferral.
4767 16. If an IP address had so many PTR records that the DNS lookup buffer
4768 was not large enough to hold them, Exim could crash while trying to process
4769 the truncated data. It now detects and logs this case.
4771 17. Further to 4.21/58, another change has been made: if (and only if) the
4772 first line of a message (the first header line) ends with CRLF, a bare LF
4773 in a subsequent header line has a space inserted after it, so as not to
4774 terminate the header.
4776 18. Refactoring: tidied an ugly bit of code in appendfile that copied data
4777 unnecessarily, used atoi() instead of strtol(), and didn't check the
4778 termination when getting file sizes from file names by regex.
4780 19. Completely re-implemented the support for maildirsize files, in the light
4781 of a number of problems with the previous contributed implementation
4782 (4.30/29). In particular:
4784 . If the quota is zero, the maildirsize file is maintained, but no quota is
4787 . If the maildir directory does not exist, it is created before any attempt
4788 to write a maildirsize file.
4790 . The quota value in the file is just a cache; if the quota is changed in
4791 the transport, the new value overrides.
4793 . A regular expression is available for excluding directories from the
4796 20. The autoreply transport checks the characters in options that define the
4797 message's headers; it allows continued headers, but it was checking with
4798 isspace() after an embedded newline instead of explicitly looking for a
4801 21. If all the "regular" hosts to which an address was routed had passed their
4802 expiry times, and had not reached their retry times, the address was
4803 bounced, even if fallback hosts were defined. Now Exim should go on to try
4806 22. Increased buffer sizes in the callout code from 1024 to 4096 to match the
4807 equivalent code in the SMTP transport. Some hosts send humungous responses
4808 to HELO/EHLO, more than 1024 it seems.
4810 23. Refactoring: code in filter.c used (void *) for "any old type" but this
4811 gives compiler warnings in some environments. I've now done it "properly",
4814 24. The replacement for inet_ntoa() that is used with gcc on IRIX systems
4815 (because of problems with the built-in one) was declared to return uschar *
4816 instead of char *, causing compiler failure.
4818 25. Fixed a file descriptor leak when processing alias/forward files.
4820 26. Fixed a minor format string issue in dbfn.c.
4822 27. Typo in exim.c: ("dmbnz" for "dbmnz").
4824 28. If a filter file refered to $h_xxx or $message_headers, and the headers
4825 contained RFC 2047 "words", Exim's memory could, under certain conditions,
4828 29. When a sender address is verified, it is cached, to save repeating the test
4829 when there is more than one recipient in a message. However, when the
4830 verification involves a callout, it is possible for different callout
4831 options to be set for different recipients. It is too complicated to keep
4832 track of this in the cache, so now Exim always runs a verification when a
4833 callout is required, relying on the callout cache for the optimization.
4834 The overhead is duplication of the address routing, but this should not be
4837 30. Fixed a bug in callout caching. If a RCPT command caused the sender address
4838 to be verified with callout=postmaster, and the main callout worked but the
4839 postmaster check failed, the verification correctly failed. However, if a
4840 subsequent RCPT command asked for sender verification *without* the
4841 postmaster check, incorrect caching caused this verification also to fail,
4844 31. Exim caches DNS lookup failures so as to avoid multiple timeouts; however,
4845 it was not caching the DNS options (qualify_single, search_parents) that
4846 were used when the lookup failed. A subsequent lookup with different
4847 options therefore always gave the same answer, though there were cases
4848 where it should not have. (Example: a "domains = !$mx_any" option on a
4849 dnslookup router: the "domains" option is always processed without any
4850 widening, but the router might have qualify_single set.) Now Exim uses the
4851 cached value only when the same options are set.
4853 32. Added John Jetmore's "exipick" utility to the distribution.
4855 33. GnuTLS: When an attempt to start a TLS session fails for any reason other
4856 than a timeout (e.g. a certificate is required, and is not provided), an
4857 Exim server now closes the connection immediately. Previously it waited for
4858 the client to close - but if the client is SSL, it seems that they each
4859 wait for each other, leading to a delay before one of them times out.
4861 34: GnuTLS: Updated the code to use the new GnuTLS 1.0.0 API. I have not
4862 maintained 0.8.x compatibility because I don't think many are using it, and
4863 it is clearly obsolete.
4865 35. Added TLS support for CRLs: a tls_crl global option and one for the smtp
4868 36. OpenSSL: $tls_certificate_verified was being set to 1 even if the
4869 client certificate was expired. A simple patch fixes this, though I don't
4870 understand the full logic of why the verify callback is called multiple
4873 37. OpenSSL: a patch from Robert Roselius: "Enable client-bug workaround.
4874 Versions of OpenSSL as of 0.9.6d include a 'CBC countermeasure' feature,
4875 which causes problems with some clients (such as the Certicom SSL Plus
4876 library used by Eudora). This option, SSL_OP_DONT_INSERT_EMPTY_FRAGMENTS,
4877 disables the coutermeasure allowing Eudora to connect."
4879 38. Exim was not checking that a write() to a log file succeeded. This could
4880 lead to Bad Things if a log got too big, in particular if it hit a file
4881 size limit. Exim now panics and dies if it cannot write to a log file, just
4882 as it does if it cannot open a log file.
4884 39. Modified OS/Makefile-Linux so that it now contains
4886 CFLAGS=-O -D_FILE_OFFSET_BITS=64 -D_LARGEFILE_SOURCE
4888 The two -D definitions ensure that Exim is compiled with large file
4889 support, which makes it possible to handle log files that are bigger than
4892 40. Fixed a subtle caching bug: if (in an ACL or a set of routers, for
4893 instance) a domain was checked against a named list that involved a lookup,
4894 causing $domain_data to be set, then another domain was checked against the
4895 same list, then the first domain was re-checked, the value of $domain_data
4896 after the final check could be wrong. In particular, if the second check
4897 failed, it could be set empty. This bug probably also applied to
4900 41. The strip_trailing_dot option was not being applied to the address given
4901 with the -f command-line option.
4903 42. The code for reading a message's header from the spool was incrementing
4904 $received_count, but never initializing it. This meant that the value was
4905 incorrect (doubled) while delivering a message in the same process in which
4906 it was received. In the most common configuration of Exim, this never
4907 happens - a fresh exec is done - but it can happen when
4908 deliver_drop_privilege is set.
4910 43. When Exim logs an SMTP synchronization error - client data sent too soon -
4911 it now includes up to 150 characters of the unexpected data in the log
4914 44. The exim_dbmbuild utility uses fixed size buffers for reading input lines
4915 and building data strings. The size of both of these buffers was 10 000
4916 bytes - far larger than anybody would *ever* want, thought I. Needless to
4917 say, somebody hit the limit. I have increased the maximum line length to
4918 20 000 and the maximum data length of concatenated lines to 100 000. I have
4919 also fixed two bugs, because there was no checking on these buffers. Tsk,
4920 tsk. Now exim_dbmbuild gives a message and exits with an error code if a
4921 buffer is too small.
4923 45. The exim_dbmbuild utility did not support quoted keys, as Exim does in
4924 lsearch lookups. Now it does.
4926 46. When parsing a route_list item in a manualroute router, a fixed-length
4927 buffer was used for the list of hosts. I made this 1024 bytes long,
4928 thinking that nobody would ever have a list of hosts that long. Wrong.
4929 Somebody had a whole pile of complicated expansion conditions, and the
4930 string was silently truncated, leading to an expansion error. It turns out
4931 that it is easier to change to an unlimited length (owing to other changes
4932 that have happened since this code was originally written) than to build
4933 structure for giving a limitation error. The length of the item that
4934 expands into the list of hosts is now unlimited.
4936 47. The lsearch lookup could not handle data where the length of text line was
4937 more than 4095 characters. Such lines were truncated, leading to shortened
4938 data being returned. It should now handle lines of any length.
4940 48. Minor wording revision: "cannot test xxx in yyy ACL" becomes "cannot test
4941 xxx condition in yyy ACL" (e.g. "cannot test domains condition in DATA
4944 49. Cosmetic tidy to scripts like exicyclog that are generated by globally
4945 replacing strings such as BIN_DIRECTORY in a source file: the replacement
4946 no longer happens in comment lines. A list of replacements is now placed
4947 at the head of all of the source files, except those whose only change is
4948 to replace PERL_COMMAND in the very first #! line.
4950 50. Replaced the slow insertion sort in queue.c, for sorting the list of
4951 messages on the queue, with a bottom-up merge sort, using code contributed
4952 by Michael Haardt. This should make operations like -bp somewhat faster on
4953 large queues. It won't affect queue runners, except when queue_run_in_order
4956 51. Installed eximstats 1.31 in the distribution.
4958 52. Added support for SRV lookups to the dnslookup router.
4960 53. If an ACL referred to $message_body or $message_body_end, the value was not
4961 reset for any messages that followed in the same SMTP session.
4963 54. The store-handling optimization for building very long strings was not
4964 differentiating between the different store pools. I don't think this
4965 actually made any difference in practice, but I've tidied it.
4967 55. While running the routers to verify a sender address, $sender_address
4968 was still set to the sender address. This is wrong, because when routing to
4969 send a bounce to the sender, it would be empty. Therefore, I have changed
4970 it so that, while verifying a sender address, $sender_address is set to <>.
4971 (There is no change to what happens when verifying a recipient address.)
4973 56. After finding MX (or SRV) records, Exim was doing a DNS lookup for the
4974 target A or AAAA records (if not already returned) without resetting the
4975 qualify_single or search_parents options of the DNS resolver. These are
4976 inappropriate in this case because the targets of MX and SRV records must
4977 be FQDNs. A broken DNS record could cause trouble if it happened to have a
4978 target that, when qualified, matched something in the local domain. These
4979 two options are now turned off when doing these lookups.
4981 57. It seems that at least some releases of Reiserfs (which does not have the
4982 concept of a fixed number of inodes) returns zero and not -1 for the
4983 number of available inodes. This interacted badly with check_spool_inodes,
4984 which assumed that -1 was the "no such thing" setting. What I have done is
4985 to check that the total number of inodes is greater than zero before doing
4986 the test of how many are available.
4988 58. When a "warn" ACL statement has a log_message modifier, the message is
4989 remembered, and not repeated. This is to avoid a lot of repetition when a
4990 message has many recipients that cause the same warning to be written.
4991 Howewer, Exim was preserving the list of already written lines for an
4992 entire SMTP session, which doesn't seem right. The memory is now reset if a
4993 new message is started.
4995 59. The "rewrite" debugging flag was not showing the result of rewriting in the
4996 debugging output unless log_rewrite was also set.
4998 60. Avoid a compiler warning on 64-bit systems in dsearch.c by avoiding the use
4999 of (int)(handle) when we know that handle contains (void *)(-1).
5001 61. The Exim daemon panic-logs an error return when it closes the incoming
5002 connection. However "connection reset by peer" seems to be common, and
5003 isn't really an error worthy of noting specially, so that particular error
5006 62. When Exim is trying to find all the local interfaces, it used to panic and
5007 die if the ioctl to get the interface flags failed. However, it seems that
5008 on at least one OS (Solaris 9) it is possible to have an interface that is
5009 included in the list of interfaces, but for which you get a failure error
5010 for this call. This happens when the interface is not "plumbed" into a
5011 protocol (i.e. neither IPv4 nor IPv6). I've changed the code so that a
5012 failure of the "get flags" call assumes that the interface is down.
5014 63. Added a ${eval10: operator, which assumes all numbers are decimal. This
5015 makes life easier for people who are doing arithmetic on fields extracted
5016 from dates, where you often get leading zeros that should not be
5017 interpreted as octal.
5019 64. Added qualify_domain to the redirect router, to override the global
5022 65. If a pathologically long header line contained very many addresses (the
5023 report of this problem mentioned 10 000) and each of them was rewritten,
5024 Exim could use up a very large amount of memory. (It kept on making new
5025 copies of the header line as it rewrote, and never released the old ones.)
5026 At the expense of a bit more processing, the header rewriting function has
5027 been changed so that it no longer eats memory in this way.
5029 66. The generation of the Received: header has been moved from the time that a
5030 message starts to be received, to the time that it finishes. The timestamp
5031 in the Received: header should now be very close to that of the <= log
5032 line. There are two side-effects of this change:
5034 (a) If a message is rejected by a DATA or non-SMTP ACL or local_scan(), the
5035 logged header lines no longer include the local Received: line, because
5036 it has not yet been created. The same applies to a copy of the message
5037 that is returned to a non-SMTP sender when a message is rejected.
5039 (b) When a filter file is tested using -bf, no additional Received: header
5040 is added to the test message. After some thought, I decided that this
5043 This change does not affect the value of $received_for. It is still set
5044 after address rewriting, but before local_scan() is called.
5046 67. Installed the latest Cygwin-specific files from the Cygwin maintainer.
5048 68. GnuTLS: If an empty file is specified for tls_verify_certificates, GnuTLS
5049 gave an unhelpful panic error message, and a defer error. I have managed to
5050 change this behaviour so that it now rejects any supplied certificate,
5051 which seems right, as the list of acceptable certificates is empty.
5053 69. OpenSSL: If an empty file is specified for tls_verify_certificates, OpenSSL
5054 gave an unhelpful defer error. I have not managed to make this reject any
5055 supplied certificates, but the error message it gives is "no certificate
5056 supplied", which is not helpful.
5058 70. exigrep's output now also includes lines that are not associated with any
5059 message, but which match the given pattern. Implemented by a patch from
5060 Martin Sluka, which also tidied up the Perl a bit.
5062 71. Recipient callout verification, like sender verification, was using <> in
5063 the MAIL FROM command. This isn't really the right thing, since the actual
5064 sender may affect whether the remote host accepts the recipient or not. I
5065 have changed it to use the actual sender in the callout; this means that
5066 the cache record is now keyed on a recipient/sender pair, not just the
5067 recipient address. There doesn't seem to be a real danger of callout loops,
5068 since a callout by the remote host to check the sender would use <>.
5069 [SEE ABOVE: changed after hitting problems.]
5071 72. Exim treats illegal SMTP error codes that do not begin with 4 or 5 as
5072 temporary errors. However, in the case of such a code being given after
5073 the end of a data transmission (i.e. after ".") Exim was failing to write
5074 a retry record for the message. (Yes, there was some broken host that was
5075 actually sending 8xx at this point.)
5077 73. An unknown lookup type in a host list could cause Exim to panic-die when
5078 the list was checked. (An example that provoked this was putting <; in the
5079 middle of a list instead of at the start.) If this happened during a DATA
5080 ACL check, a -D file could be left lying around. This kind of configuration
5081 error no longer causes Exim to die; instead it causes a defer errror. The
5082 incident is still logged to the main and panic logs.
5084 74. Buglet left over from Exim 3 conversion. The message "too many messages
5085 in one connection" was written to the rejectlog but not the mainlog, except
5086 when address rewriting (yes!) was being logged.
5088 75. Added write_rejectlog option.
5090 76. When a system filter was run not as root (that is, when system_filter_user
5091 was set), the values of the $n variables were not being returned to the
5092 main process; thus, they were not subsequently available in the $sn
5095 77. Added +return_path_on_delivery log selector.
5097 78. A connection timeout was being treated differently from recipients deferred
5098 when testing hosts_max_try with a message that was older than the host's
5099 retry timeout. (The host should not be counted, thus allowing all hosts to
5100 be tried at least once before bouncing.) This may have been the cause of an
5101 occasionally reported bug whereby a message would remain on the queue
5102 longer than the retry timeout, but would be bounced if a delivery was
5103 forced. I say "may" because I never totally pinned down the problem;
5104 setting up timeout/retry tests is difficult. See also the next item.
5106 79. The ultimate address timeout was not being applied to errors that involved
5107 a combination of host plus message (for example, a timeout on a MAIL
5108 command). When an address resolved to a number of possible hosts, and they
5109 were not all tried for each delivery (e.g. because of hosts_max_try), a
5110 message could remain on the queue longer than the retry timeout.
5112 80. Sieve bug: "stop" inside "elsif" was broken. Applied a patch from Michael
5115 81. Fixed an obscure SMTP outgoing bug which required at least the following
5116 conditions: (a) there was another message waiting for the same server;
5117 (b) the server returned 5xx to all RCPT commands in the first message so
5118 that the message was not completed; (c) the server dropped the connection
5119 or gave a negative response to the RSET that Exim sends to abort the
5120 transaction. The observed case was a dropped connection after DATA that had
5121 been sent in pipelining mode. That is, the server had advertised PIPELINING
5122 but was not implementing it correctly. The effect of the bug was incorrect
5123 behaviour, such as trying another host, and this could lead to a crash.
5129 1. The 3rd arguments to getsockname(), getpeername(), and accept() in exim.c
5130 and daemon.c were passed as pointers to ints; they should have been
5131 pointers to socklen_t variables (which are typically unsigned ints).
5133 2. Some signed/unsigned type warnings in the os.c file for Linux have been
5136 3. Fixed a really odd bug that affected only the testing scheme; patching a
5137 certain fixed string in the binary changed the value of another string that
5138 happened to be identical to the end of the original first string.
5140 4. When gethostbyname() (or equivalent) is passed an IP address as a "host
5141 name", it returns that address as the IP address. On some operating
5142 systems (e.g. Solaris), it also passes back the IP address string as the
5143 "host name". However, on others (e.g. Linux), it passes back an empty
5144 string. Exim wasn't checking for this, and was changing the host name to an
5145 empty string, assuming it had been canonicized.
5147 5. Although rare, it is permitted to have more than one PTR record for a given
5148 IP address. I thought that gethostbyaddr() or getipnodebyaddr() always gave
5149 all the names associated with an address, because they do in Solaris.
5150 However, it seems that they do not in Linux for data that comes from the
5151 DNS. If an address in /etc/hosts has multiple names, they _are_ all given.
5152 I found this out when I moved to a new Linux workstation and tried to run
5153 the Exim test suite.
5155 To get round this problem I have changed the code so that it now does its
5156 own call to the DNS to look up PTR records when searching for a host name.
5157 If nothing can be found in the DNS, it tries gethostbyaddr(), so that
5158 addresses that are only in /etc/hosts are still found.
5160 This behaviour is, however, controlled by an option called host_lookup_
5161 order, which defaults to "bydns:byaddr". If people want to use the other
5162 order, or indeed, just use one or the other means of lookup, they can
5163 specify it in this variable.
5165 6. If a PTR record yields an empty name, Exim treats it as non-existent. In
5166 some operating systems, this comes back from gethostbyaddr() as an empty
5167 string, and this is what Exim used to test for. However, it seems that in
5168 other systems, "." is yielded. Exim now tests for this case too.
5170 7. The values of check_spool_space and check_log_space are now held internally
5171 as a number of kilobytes instead of an absolute number of bytes. If a
5172 numbers is specified without 'K' or 'M', it is rounded up to the nearest
5173 kilobyte. This means that much larger values can be stored.
5175 8. Exim monitor: an attempt to get the action menu when not actually pointing
5176 at a message produces an empty menu entitled "No message selected". This
5177 works on Solaris (OpenWindows). However, XFree86 does not like a menu with
5178 no entries in it ("Shell widget menu has zero width and/or height"). So I
5179 have added a single, blank menu entry in this case.
5181 9. Added ${quote_local_part.
5183 10. MIME decoding is now applied to the contents of Subject: header lines when
5186 11. Now that a reference to $sender_host_address automatically causes a reverse
5187 lookup to occur if necessary (4.13/18), there is no need to arrange for a
5188 host lookup before query-style lookups in lists that might use this
5189 variable. This has therefore been abolished, and the "net-" prefix is no
5190 longer necessary for query-style lookups.
5192 12. The Makefile for SCO_SV contained a setting of LDFLAGS. This appears to
5193 have been a typo for LFLAGS, so it has been changed.
5195 13. The install script calls Exim with "-C /dev/null" in order to find the
5196 version number. If ALT_CONFIG_PREFIX was set, this caused an error message
5197 to be output. Howeve, since Exim outputs its version number before the
5198 error, it didn't break the script. It just looked ugly. I fixed this by
5199 always allowing "-C /dev/null" if the caller is root.
5201 14. Ignore overlarge ACL variable number when reading spool file - insurance
5202 against a later release with more variables having written the file.
5204 15. The standard form for an IPv6 address literal was being rejected by EHLO.
5205 Example: [IPv6:2002:c1ed:8229:10:202:2dff:fe07:a42a]. Exim now accepts
5206 this, as well as the form without the "IPv6" on the front.
5208 16. Added CHOWN_COMMAND=/usr/sbin/chown and LIBS=-lresolv to the
5209 OS/Makefile-Darwin file.
5211 17. Fixed typo in lookups/ldap.c: D_LOOKUP should be D_lookup. This applied
5212 only to LDAP libraries that do not have LDAP_OPT_DEREF.
5214 18. After change 4.21/52, "%ld" was used to format the contents of the $inode
5215 variable. However, some OS use ints for inodes. I've added cast to long int
5216 to get rid of the compiler warning.
5218 19. I had forgotten to lock out "/../" in configuration file names when
5219 ALT_CONFIG_PREFIX was set.
5221 20. Routers used for verification do not need to specify transports. However,
5222 if such a router generated a host list, and callout was configured, Exim
5223 crashed, because it could not find a port number from the (non-existent)
5224 transport. It now assumes port 25 in this circumstance.
5226 21. Added the -t option to exigrep.
5228 22. If LOOKUP_LSEARCH is defined, all three linear search methods (lsearch,
5229 wildlsearch, nwildlsearch) are compiled. LOOKUP_WILDLSEARCH and LOOKUP_
5230 NWILDLSEARCH are now obsolete, but retained for compatibility. If either of
5231 them is set, LOOKUP_LSEARCH is forced.
5233 23. "exim -bV" now outputs a list of lookups that are included in the binary.
5235 24. Added sender and host information to the "rejected by local_scan()" log
5236 line; previously there was no indication of these.
5238 25. Added .include_if_exists.
5240 26. Change 3.952/11 added an explicit directory sync on top of a file sync for
5241 Linux. It turns out that not all file systems support this. Apparently some
5242 versions of NFS do not. (It's rare to put Exim's spool on NFS, but people
5243 do it.) To cope with this, the error EINVAL, which means that sync-ing is
5244 not supported on the file descriptor, is now ignored when Exim is trying to
5245 sync a directory. This applies only to Linux.
5247 27. Added -DBIND_8_COMPAT to the CLFAGS setting for Darwin.
5249 28. In Darwin (MacOS X), the PAM headers are in /usr/include/pam and not in
5250 /usr/include/security. There's now a flag in OS/os.h-Darwin to cope with
5253 29. Added support for maildirsize files from supplied patch (modified a bit).
5255 30. The use of :fail: followed by an empty string could lead Exim to respond to
5256 sender verification failures with (e.g.):
5258 550 Verification failed for <xxx>
5259 550 Sender verify failed
5261 where the first response line was missing the '-' that indicates it is not
5262 the final line of the response.
5264 31. The loop for finding the name of the user that called Exim had a hardwired
5265 limit of 10; it now uses the value of finduser_retries, which is used for
5266 all other user lookups.
5268 32. Added $received_count variable, available in data and not_smtp ACLs, and at
5271 33. Exim was neglecting to zero errno before one call of strtol() when
5272 expanding a string and expecting an integer value. On some systems this
5273 resulted in spurious "integer overflow" errors. Also, it was casting the
5274 result into an int without checking.
5276 34. Testing for a connection timeout using "timeout_connect" in the retry rules
5277 did not work. The code looks as if it has *never* worked, though it appears
5278 to have been documented since at least releast 1.62. I have made it work.
5280 35. The "timeout_DNS" error in retry rules, also documented since at least
5281 1.62, also never worked. As it isn't clear exactly what this means, and
5282 clearly it isn't a major issue, I have abolished the feature by treating it
5283 as "timeout", and writing a warning to the main and panic logs.
5285 36. The display of retry rules for -brt wasn't always showing the error code
5288 37. Added new error conditions to retry rules: timeout_A, timeout_MX,
5289 timeout_connect_A, timeout_connect_MX.
5291 38. Rewriting the envelope sender at SMTP time did not allow it to be rewritten
5292 to the empty sender.
5294 39. The daemon was not analysing the content of -oX till after it had closed
5295 stderr and disconnected from the controlling terminal. This meant that any
5296 syntax errors were only noted on the panic log, and the return code from
5297 the command was 0. By re-arranging the code a little, I've made the
5298 decoding happen first, so such errors now appear on stderr, and the return
5299 code is 1. However, the actual setting up of the sockets still happens in
5300 the disconnected process, so errors there are still only recorded on the
5303 40. A daemon listener on a wildcard IPv6 socket that also accepts IPv4
5304 connections (as happens on some IP stacks) was logged at start up time as
5305 just listening for IPv6. It now logs "IPv6 with IPv4". This differentiates
5306 it from "IPv6 and IPv4", which means that two separate sockets are being
5309 41. The debug output for gethostbyname2() or getipnodebyname() failures now
5310 says whether AF_INET or AF_INET6 was passed as an argument.
5312 42. Exiwhat output was messed up when time zones were included in log
5315 43. Exiwhat now gives more information about the daemon's listening ports,
5316 and whether -tls-on-connect was used.
5318 44. The "port" option of the smtp transport is now expanded.
5320 45. A "message" modifier in a "warn" statement in a non-message ACL was being
5321 silently ignored. Now an error message is written to the main and panic
5324 46. There's a new ACL modifier called "logwrite" which writes to a log file
5325 as soon as it is encountered.
5327 47. Added $local_user_uid and $local_user_gid at routing time.
5329 48. Exim crashed when trying to verify a sender address that was being
5332 49. Exim was recognizing only a space character after ".include". It now also
5333 recognizes a tab character.
5335 50. Fixed several bugs in the Perl script that creates the exim.8 man page by
5336 extracting the relevant information from the specification. The man page no
5337 longer contains scrambled data for the -d option, and I've added a section
5338 at the front about calling Exim under different names.
5340 51. Added "extra_headers" argument to the "mail" command in filter files.
5342 52. Redirecting mail to an unqualified address in a Sieve filter caused Exim to
5345 53. Installed eximstats 1.29.
5347 54. Added transport_filter_timeout as a generic transport option.
5349 55. Exim no longer adds an empty Bcc: header to messages that have no To: or
5350 Cc: header lines. This was required by RFC 822, but it not required by RFC
5353 56. Exim used to add From:, Date:, and Message-Id: header lines to any
5354 incoming messages that did not have them. Now it does so only if the
5355 message originates locally, that is, if there is no associated remote host
5356 address. When Resent- header lines are present, this applies to the Resent-
5357 lines rather than the non-Resent- lines.
5359 57. Drop incoming SMTP connection after too many syntax or protocol errors. The
5360 limit is controlled by smtp_max_synprot_errors, defaulting to 3.
5362 58. Messages for configuration errors now include the name of the main
5363 configuration file - useful now that there may be more than one file in a
5364 list (.included file names were always shown).
5366 59. Change 4.21/82 (run initgroups() when starting the daemon) causes problems
5367 for those rare installations that do not start the daemon as root or run it
5368 setuid root. I've cut out the call to initgroups() if the daemon is not
5371 60. The Exim user and group can now be bound into the binary as text strings
5372 that are looked up at the start of Exim's processing.
5374 61. Applied a small patch for the Interbase code, supplied by Ard Biesheuvel.
5376 62. Added $mailstore_basename variable.
5378 63. Installed patch to sieve.c from Michael Haardt.
5380 64. When Exim failed to open the panic log after failing to open the main log,
5381 the original message it was trying to log was written to stderr and debug
5382 output, but if they were not available (the usual case in production), it
5383 was lost. Now it is written to syslog before the two lines that record the
5384 failures to open the logs.
5386 65. Users' Exim filters run in subprocesses under the user's uid. It is
5387 possible for a "deliver" command or an alias in a "personal" command to
5388 provoke an address rewrite. If logging of address rewriting is configured,
5389 this fails because the process is not running as root or exim. There may be
5390 a better way of dealing with this, but for the moment (because 4.30 needs
5391 to be released), I have disabled address rewrite logging when running a
5392 filter in a non-root, non-exim process.
5398 1. The buildconfig auxiliary program wasn't quoting the value set for
5399 HEADERS_CHARSET. This caused a compilation error complaining that 'ISO' was
5400 not defined. This bug was masked in 4.22 by the effect that was fixed in
5403 2. Some messages that were rejected after a message id was allocated were
5404 shown as "incomplete" by exigrep. It no longer does this for messages that
5405 are rejected by local_scan() or the DATA or non-SMTP ACLs.
5407 3. If a Message-ID: header used a domain literal in the ID, and Exim did not
5408 have allow_domain_literals set, the ID did not get logged in the <= line.
5409 Domain literals are now always recognized in Message-ID: header lines.
5411 4. The first argument for a ${extract expansion item is the key name or field
5412 number. Leading and trailing spaces in this item were not being ignored,
5413 causing some misleading effects.
5415 5. When deliver_drop_privilege was set, single queue runner processes started
5416 manually (i.e. by the command "exim -q") or by the daemon (which uses the
5417 same command in the process it spins off) were not dropping privilege.
5419 6. When the daemon running as "exim" started a queue runner, it always
5420 re-executed Exim in the spun-off process. This is a waste of effort when
5421 deliver_drop_privilege is set. The new process now just calls the
5422 queue-runner function directly.
5428 1. Typo in the src/EDITME file: it referred to HEADERS_DECODE_TO instead of
5431 2. Change 4.21/73 introduced a bug. The pid file path set by -oP was being
5432 ignored. Though the use of -oP was forcing the writing of a pid file, it
5433 was always written to the default place.
5435 3. If the message "no IP address found for host xxxx" is generated during
5436 incoming verification, it is now followed by identification of the incoming
5437 connection (so you can more easily find what provoked it).
5439 4. Bug fix for Sieve filters: "stop" inside a block was not working properly.
5441 5. Added some features to "harden" Exim a bit more against certain attacks:
5443 (a) There is now a build-time option called FIXED_NEVER_USERS that can
5444 be put in Local/Makefile. This is like the never_users runtime option,
5445 but it cannot be overridden. The default setting is "root".
5447 (b) If ALT_CONFIG_PREFIX is defined in Local/Makefile, it specifies a
5448 prefix string with which any file named in a -C command line option
5451 (c) If ALT_CONFIG_ROOT_ONLY is defined in Local/Makefile, root privilege
5452 is retained for -C and -D only if the caller of Exim is root. Without
5453 it, the exim user may also use -C and -D and retain privilege.
5455 (d) If DISABLE_D_OPTION is defined in Local/Makefile, the use of the -D
5456 command line option is disabled.
5458 6. Macro names set by the -D option must start with an upper case letter, just
5459 like macro names defined in the configuration file.
5461 7. Added "dereference=" facility to LDAP.
5463 8. Two instances of the typo "uknown" in the source files are fixed.
5465 9. If a PERL_COMMAND setting in Local/Makefile was not at the start of a line,
5466 the Configure-Makefile script screwed up while processing it.
5468 10. Incorporated PCRE 4.4.
5470 11. The SMTP synchronization check was not operating right at the start of an
5471 SMTP session. For example, it could not catch a HELO sent before the client
5472 waited for the greeting. There is now a check for outstanding input at the
5473 point when the greeting is written. Because of the duplex, asynchronous
5474 nature of TCP/IP, it cannot be perfect - the incorrect input may be on its
5475 way, but not yet received, when the check is performed.
5477 12. Added tcp_nodelay to make it possible to turn of the setting of TCP_NODELAY
5478 on TCP/IP sockets, because this apparently causes some broken clients to
5481 13. Installed revised OS/Makefile-CYGWIN and OS/os.c-cygwin (the .h file was
5482 unchanged) from the Cygwin maintainer.
5484 14. The code for -bV that shows what is in the binary showed "mbx" when maildir
5485 was supported instead of testing for mbx. Effectively a typo.
5487 15. The spa authenticator server code was not checking that the input it
5488 received was valid base64.
5490 16. The debug output line for the "set" modifier in ACLs was not showing the
5491 name of the variable that was being set.
5493 17. Code tidy: the variable type "vtype_string" was never used. Removed it.
5495 18. Previously, a reference to $sender_host_name did not cause a DNS reverse
5496 lookup on its own. Something else was needed to trigger the lookup. For
5497 example, a match in host_lookup or the need for a host name in a host list.
5498 Now, if $sender_host_name is referenced and the host name has not yet been
5499 looked up, a lookup is performed. If the lookup fails, the variable remains
5500 empty, and $host_lookup_failed is set to "1".
5502 19. Added "eqi" as a case-independent comparison operator.
5504 20. The saslauthd authentication condition could segfault if neither service
5505 nor realm was specified.
5507 21. If an overflowing value such as "2048M" was set for message_size_limit, the
5508 error message that was logged was misleading, and incoming SMTP
5509 connections were dropped. The message is now more accurate, and temporary
5510 errors are given to SMTP connections.
5512 22. In some error situations (such as 21 above) Exim rejects all SMTP commands
5513 (except RSET) with a 421 error, until QUIT is received. However, it was
5514 failing to send a response to QUIT.
5516 23. The HELO ACL was being run before the code for helo_try_verify_hosts,
5517 which made it impossible to use "verify = helo" in the HELO ACL. The HELO
5518 ACL is now run after the helo_try_verify_hosts code.
5520 24. "{MD5}" and "{SHA1}" are now recognized as equivalent to "{md5"} and
5521 "{sha1}" in the "crypteq" expansion condition (in fact the comparison is
5522 case-independent, so other case variants are also recognized). Apparently
5523 some systems use these upper case variants.
5525 25. If more than two messages were waiting for the same host, and a transport
5526 filter was specified for the transport, Exim sent two messages over the
5527 same TCP/IP connection, and then failed with "socket operation on non-
5528 socket" when it tried to send the third.
5530 26. Added Exim::debug_write and Exim::log_write for embedded Perl use.
5532 27. The extern definition of crypt16() in expand.c was not being excluded when
5533 the OS had its own crypt16() function.
5535 28. Added bounce_return_body as a new option, and bounce_return_size_limit
5536 as a preferred synonym for return_size_limit, both as an option and as an
5539 29. Added LIBS=-liconv to OS/Makefile-OSF1.
5541 30. Changed the default configuration ACL to relax the local part checking rule
5542 for addresses that are not in any local domains. For these addresses,
5543 slashes and pipe symbols are allowed within local parts, but the sequence
5544 /../ is explicitly forbidden.
5546 31. SPA server authentication was not clearing the challenge buffer before
5549 32. log_message in a "warn" ACL statement was writing to the reject log as
5550 well as to the main log, which contradicts the documentation and doesn't
5551 seem right (because no rejection is happening). So I have stopped it.
5553 33. Added Ard Biesheuvel's lookup code for accessing an Interbase database.
5554 However, I am unable to do any testing of this.
5556 34. Fixed an infelicity in the appendfile transport. When checking directories
5557 for a mailbox, to see if any needed to be created, it was accidentally
5558 using path names with one or more superfluous leading slashes; tracing
5559 would show up entries such as stat("///home/ph10", 0xFFBEEA48).
5561 35. If log_message is set on a "discard" verb in a MAIL or RCPT ACL, its
5562 contents are added to the log line that is written for every discarded
5563 recipient. (Previously a log_message setting was ignored.)
5565 36. The ${quote: operator now quotes the string if it is empty.
5567 37. The install script runs exim in order to find its version number. If for
5568 some reason other than non-existence or emptiness, which it checks, it
5569 could not run './exim', it was installing it with an empty version number,
5570 i.e. as "exim-". This error state is now caught, and the installation is
5573 38. An argument was missing from the function that creates an error message
5574 when Exim fails to connect to the socket for saslauthd authentication.
5575 This could cause Exim to crash, or give a corrupted message.
5577 39. Added isip, isip4, and isip6 to ${if conditions.
5579 40. The ACL variables $acl_xx are now saved with the message, and can be
5580 accessed later in routers, transports, and filters.
5582 41. The new lookup type nwildlsearch is like wildlsearch, except that the key
5583 strings in the file are not string-expanded.
5585 42. If a MAIL command specified a SIZE value that was too large to fit into an
5586 int variable, the check against message_size_limit failed. Such values are
5587 now forced to INT_MAX, which is around 2Gb for a 32-bit variable. Maybe one
5588 day this will have to be increased, but I don't think I want to be around
5589 when emails are that large.
5596 1. Removed HAVE_ICONV=yes from OS/Makefile-FreeBSD, since it seems that
5597 iconv() is not standard in FreeBSD.
5599 2. Change 4.21/17 was buggy and could cause stack overwriting on a system with
5600 IPv6 enabled. The observed symptom was a segmentation fault on return from
5601 the function os_common_find_running_interfaces() in src/os.c.
5603 3. In the check_special_case() function in daemon.c I had used "errno" as an
5604 argument name, which causes warnings on some systems. This was basically a
5605 typo, since it was named "eno" in the comments!
5607 4. The code that waits for the clock to tick (at a resolution of some fraction
5608 of a second) so as to ensure message-id uniqueness was always waiting for
5609 at least one whole tick, when it could have waited for less. [This is
5610 almost certainly not relevant at current processor speeds, where it is
5611 unlikely to ever wait at all. But we try to future-proof.]
5613 5. The function that sleeps for a time interval that includes fractions of a
5614 second contained a race. It did not block SIGALRM between setting the
5615 timer, and suspending (a couple of lines later). If the interval was short
5616 and the sigsuspend() was delayed until after it had expired, the suspension
5617 never ended. On busy systems this could lead to processes getting stuck for
5620 6. Some uncommon configurations may cause a lookup to happen in a queue runner
5621 process, before it forks any delivery processes. The open lookup caching
5622 mechanism meant that the open file or database connection was passed into
5623 the delivery process. The problem was that delivery processes always tidy
5624 up cached lookup data. This could cause a problem for the next delivery
5625 process started by the queue runner, because the external queue runner
5626 process does not know about the closure. So the next delivery process
5627 still has data in the lookup cache. In the case of a file lookup, there was
5628 no problem because closing a file descriptor in a subprocess doesn't affect
5629 the parent. However, if the lookup was caching a connection to a database,
5630 the connection was closed, and the second delivery process was likely to
5631 see errors such as "PGSQL: query failed: server closed the connection
5632 unexpectedly". The problem has been fixed by closing all cached lookups
5633 in a queue runner before running a delivery process.
5635 7. Compiler warning on Linux for the second argument of iconv(), which doesn't
5636 seem to have the "const" qualifier which it has on other OS. I've
5639 8. Change 4.21/2 was too strict. It is only if there are two authenticators
5640 *of the same type* (client or server) with the same public name that an
5641 error should be diagnosed.
5643 9. When Exim looked up a host name for an IP address, but failed to find the
5644 original IP address when looking up the host name (a safety check), it
5645 output the message "<ip address> does not match any IP for NULL", which was
5646 confusing, to say the least. The bug was that the host name should have
5647 appeared instead of "NULL".
5649 10. Since release 3.03, if Exim is called by a uid other than root or the Exim
5650 user that is built into the binary, and the -C or -D options is used, root
5651 privilege is dropped before the configuration file is read. In addition,
5652 logging is switched to stderr instead of the normal log files. If the
5653 configuration then re-defines the Exim user, the unprivileged environment
5654 is probably not what is expected, so Exim logs a panic warning message (but
5657 However, if deliver_drop_privilege is set, the unprivileged state may well
5658 be exactly what is intended, so the warning has been cut out in that case,
5659 and Exim is allowed to try to write to its normal log files.
5665 1. smtp_return_error_details was not giving details for temporary sender
5666 or receiver verification errors.
5668 2. Diagnose a configuration error if two authenticators have the same public
5671 3. Exim used not to create the message log file for a message until the first
5672 delivery attempt. This could be confusing when incoming messages were held
5673 for policy or load reasons. The message log file is now created at the time
5674 the message is received, and an initial "Received" line is written to it.
5676 4. The automatically generated man page for command line options had a minor
5677 bug that caused no ill effects; however, a more serious problem was that
5678 the procedure for building the man page automatically didn't always
5679 operate. Consequently, release 4.20 contains an out-of-date version. This
5680 shouldn't happen again.
5682 5. When building Exim with embedded Perl support, the script that builds the
5683 Makefile was calling 'perl' to find its compile-time parameters, ignoring
5684 any setting of PERL_COMMAND in Local/Makefile. This is now fixed.
5686 6. The freeze_tell option was not being used for messages that were frozen on
5687 arrival, either by an ACL or by local_scan().
5689 7. Added the smtp_incomplete_transaction log selector.
5691 8. After STARTTLS, Exim was not forgetting that it had advertised AUTH, so it
5692 was accepting AUTH without a new EHLO.
5694 9. Added tls_remember_esmtp to cope with YAEB. This allows AUTH and other
5695 ESMTP extensions after STARTTLS without a new EHLO, in contravention of the
5698 10. Logging of TCP/IP connections (when configured) now happens in the main
5699 daemon process instead of the child process, so that the TCP/IP connection
5700 count is more accurate (but it can never be perfect).
5702 11. The use of "drop" in a nested ACL was not being handled correctly in the
5703 outer ACL. Now, if condition failure induced by the nested "drop" causes
5704 the outer ACL verb to deny access ("accept" or "discard" after "endpass",
5705 or "require"), the connection is dropped.
5707 12. Similarly, "discard" in a nested ACL wasn't being handled. A nested ACL
5708 that yield "discard" can now be used with an "accept" or a "discard" verb,
5709 but an error is generated for any others (because I can't see a useful way
5710 to define what should happen).
5712 13. When an ACL is read dynamically from a file (or anywhere else), the lines
5713 are now processed in the same way as lines in the Exim configuration file.
5714 In particular, continuation lines are supported.
5716 14. Added the "dnslists = a.b.c!=n.n.n.n" feature.
5718 15. Added -ti meaning -t -i.
5720 16. Check for letters, digits, hyphens, and dots in the names of dnslist
5721 domains, and warn by logging if others are found.
5723 17. At least on BSD, alignment is not guarenteed for the array of ifreq's
5724 returned from GIFCONF when Exim is trying to find the list of interfaces on
5725 a host. The code in os.c has been modified to copy each ifreq to an aligned
5726 structure in all cases.
5728 Also, in some cases, the returned ifreq's were being copied to a 'struct
5729 ifreq' on the stack, which was subsequently passed to host_ntoa(). That
5730 means the last couple of bytes of an IPv6 address could be chopped if the
5731 ifreq contained only a normal sockaddr (14 bytes storage).
5733 18. Named domain lists were not supported in the hosts_treat_as_local option.
5734 An entry such as +xxxx was not recognized, and was treated as a literal
5737 19. Ensure that header lines added by a DATA ACL are included in the reject log
5738 if the ACL subsequently rejects the message.
5740 20. Upgrade the cramtest.pl utility script to use Digest::MD5 instead of just
5741 MD5 (which is deprecated).
5743 21. When testing a filter file using -bf, Exim was writing a message when it
5744 took the sender from a "From " line in the message, but it was not doing so
5745 when it took $return_path from a Return-Path: header line. It now does.
5747 22. If the contents of a "message" modifier for a "warn" ACL verb do not begin
5748 with a valid header line field name (a series of printing characters
5749 terminated by a colon, Exim now inserts X-ACL-Warn: at the beginning.
5751 23. Changed "disc" in the source to "disk" to conform to the documentation and
5752 the book and for uniformity.
5754 24. Ignore Sendmail's -Ooption=value command line item.
5756 25. When execve() failed while trying to run a command in a pipe transport,
5757 Exim was returning EX_UNAVAILBLE (69) from the subprocess. However, this
5758 could be confused with a return value of 69 from the command itself. This
5759 has been changed to 127, the value the shell returns if it is asked to run
5760 a non-existent command. The wording for the related log line suggests a
5761 non-existent command as the problem.
5763 26. If received_header_text expands to an empty string, do not add a Received:
5764 header line to the message. (Well, it adds a token one on the spool, but
5765 marks it "old" so that it doesn't get used or transmitted.)
5767 27. Installed eximstats 1.28 (addition of -nt option).
5769 28. There was no check for failure on the call to getsockname() in the daemon
5770 code. This can fail if there is a shortage of resources on the system, with
5771 ENOMEM, for example. A temporary error is now given on failure.
5773 29. Contrary to the C standard, it seems that in some environments, the
5774 equivalent of setlocale(LC_ALL, "C") is not obeyed at the start of a C
5775 program. Exim now does this explicitly; it affects the formatting of
5776 timestamps using strftime().
5778 30. If exiqsumm was given junk data, it threw up some uninitialized variable
5779 complaints. I've now initialized all the variables, to avoid this.
5781 32. Header lines added by a system filter were not being "seen" during
5782 transport-time rewrites.
5784 33. The info_callback() function passed to OpenSSL is set up with type void
5785 (*)(SSL *, int, int), as described somewhere. However, when calling the
5786 function (actually a macro) that sets it up, the type void(*)() is
5787 expected. I've put in a cast to prevent warnings from picky compilers.
5789 34. If a DNS black list lookup found a CNAME record, but there were no A
5790 records associated with the domain it pointed at, Exim crashed.
5792 35. If a DNS black list lookup returned more than one A record, Exim ignored
5793 all but the first. It now scans all returned addresses if a particular IP
5794 value is being sought. In this situation, the contents of the
5795 $dnslist_value variable are a list of all the addresses, separated by a
5798 36. Tightened up the rules for host name lookups using reverse DNS. Exim used
5799 to accept a host name and all its aliases if the forward lookup for any of
5800 them yielded the IP address of the incoming connection. Now it accepts only
5801 those names whose forward lookup yields the correct IP address. Any other
5802 names are discarded. This closes a loophole whereby a rogue DNS
5803 administrator could create reverse DNS records to break through a
5804 wildcarded host restriction in an ACL.
5806 37. If a user filter or a system filter that ran in a subprocess used any of
5807 the numerical variables ($1, $2 etc), or $thisaddress, in a pipe command,
5808 the wrong values were passed to the pipe command ($thisaddress had the
5809 value of $0, $0 had the value of $1, etc). This bug was introduced by
5810 change 4.11/101, and not discovered because I wrote an inadequate test. :-(
5812 38. Improved the line breaking for long SMTP error messages from ACLs.
5813 Previously, if there was no break point between 40 and 75 characters, Exim
5814 left the rest of the message alone. Two changes have been made: (a) I've
5815 reduced the minimum length to 35 characters; (b) if it can't find a break
5816 point between 35 and 75 characters, it looks ahead and uses the first one
5817 that it finds. This may give the occasional overlong line, but at least the
5818 remaining text gets split now.
5820 39. Change 82 of 4.11 was unimaginative. It assumed the limit on the number of
5821 file descriptors might be low, and that setting 1000 would always raise it.
5822 It turns out that in some environments, the limit is already over 1000 and
5823 that lowering it causes trouble. So now Exim takes care not to decrease it.
5825 40. When delivering a message, the value of $return_path is set to $sender_
5826 address at the start of routing (routers may change the value). By an
5827 oversight, this default was not being set up when an address was tested by
5828 -bt or -bv, which affected the outcome if any router or filter referred to
5831 41. The idea of the "warn" ACL verb is that it adds a header or writes to the
5832 log only when "message" or "log_message" are set. However, if one of the
5833 conditions was an address verification, or a call to a nested ACL, the
5834 messages generated by the underlying test were being passed through. This
5835 no longer happens. The underlying message is available in $acl_verify_
5836 message for both "message" and "log_message" expansions, so it can be
5837 passed through if needed.
5839 42. Added RFC 2047 interpretation of header lines for $h_ expansions, with a
5840 new expansion $bh_ to give the encoded byte string without charset
5841 translation. Translation happens only if iconv() is available; HAVE_ICONV
5842 indicates this at build time. HEADERS_CHARSET gives the charset to
5843 translate to; headers_charset can change it in the configuration, and
5844 "headers charset" can change it in an individual filter file.
5846 43. Now that we have a default RFC 2047 charset (see above), the code in Exim
5847 that creates RFC 2047 encoded "words" labels them as that charset instead
5848 of always using iso-8859-1. The cases are (i) the explicit ${rfc2047:
5849 expansion operator; (ii) when Exim creates a From: line for a local
5850 message; (iii) when a header line is rewritten to include a "phrase" part.
5852 44. Nasty bug in exiqsumm: the regex to skip already-delivered addresses was
5853 buggy, causing it to skip the first lines of messages whose message ID
5854 ended in 'D'. This would not have bitten before Exim release 4.14, because
5855 message IDs were unlikely to end in 'D' before then. The effect was to have
5856 incorrect size information for certain domains.
5858 45. #include "config.h" was missing at the start of the crypt16.c module. This
5859 caused trouble on Tru64 (aka OSF1) systems, because HAVE_CRYPT16 was not
5862 46. If there was a timeout during a "random" callout check, Exim treated it as
5863 a failure of the random address, and carried on sending RSET and the real
5864 address. If the delay was just some slowness somewhere, the response to the
5865 original RCPT would be taken as a response to RSET and so on, causing
5866 mayhem of various kinds.
5868 47. Change 50 for 4.20 was a heap of junk. I don't know what I was thinking
5869 when I implemented it. It didn't allow for the fact that some option values
5870 may legitimatetly be negative (e.g. size_addition), and it didn't even do
5871 the right test for positive values.
5873 48. Domain names in DNS records are case-independent. Exim always looks them up
5874 in lower case. Some resolvers return domain names in exactly the case they
5875 appear in the zone file, that is, they may contain uppercase letters. Not
5876 all resolvers do this - some return always lower case. Exim was treating a
5877 change of case by a resolver as a change of domain, similar to a widening
5878 of a domain abbreviation. This triggered its re-routing code and so it was
5879 trying to route what was effectively the same domain again. This normally
5880 caused routing to fail (because the router wouldn't handle the domain
5881 twice). Now Exim checks for this case specially, and just changes the
5882 casing of the domain that it ultimately uses when it transmits the message
5885 49. Added Sieve (RFC 3028) support, courtesy of Michael Haardt's contributed
5888 50. If a filter generated a file delivery with a non-absolute name (possible if
5889 no home directory exists for the router), the forbid_file option was not
5892 51. Added '&' feature to dnslists, to provide bit mask matching in addition to
5893 the existing equality matching.
5895 52. Exim was using ints instead of ino_t variables in some places where it was
5896 dealing with inode numbers.
5898 53. If TMPDIR is defined in Local/Makefile (default in src/EDITME is
5899 TMPDIR="/tmp"), Exim checks for the presence of an environment variable
5900 called TMPDIR, and if it finds it is different, it changes its value.
5902 54. The smtp_printf() function is now made available to local_scan() so
5903 additional output lines can be written before returning. There is also an
5904 smtp_fflush() function to enable the detection of a dropped connection.
5905 The variables smtp_input and smtp_batched_input are exported to
5908 55. Changed the default runtime configuration: the message "Unknown user"
5909 has been removed from the ACL, and instead placed on the localuser router,
5910 using the cannot_route_message feature. This means that any verification
5911 failures that generate their own messages won't get overridden. Similarly,
5912 the "Unrouteable address" message that was in the ACL for unverifiable
5913 relay addresses has also been removed.
5915 56. Added hosts_avoid_esmtp to the smtp transport.
5917 57. The exicyclog script was not checking for the esoteric option
5918 CONFIGURE_FILE_USE_EUID in the Local/Makefile. It now does this, but it
5919 will work only if exicyclog is run under the appropriate euid.
5921 58. Following a discussion on the list, the rules by which Exim recognises line
5922 endings on incoming messages have been changed. The -dropcr and drop_cr
5923 options are now no-ops, retained only for backwards compatibility. The
5924 following line terminators are recognized: LF CRLF CR. However, special
5925 processing applies to CR:
5927 (i) The sequence CR . CR does *not* terminate an incoming SMTP message,
5928 nor a local message in the state where . is a terminator.
5930 (ii) If a bare CR is encountered in a header line, an extra space is added
5931 after the line terminator so as not to end the header. The reasoning
5932 behind this is that bare CRs in header lines are most likely either
5933 to be mistakes, or people trying to play silly games.
5935 59. The size of a message, as listed by "-bp" or in the Exim monitor window,
5936 was being incorrectly given as 18 bytes larger than it should have been.
5937 This is a VOB (very old bug).
5939 60. This may never have affected anything current, but just in case it has:
5940 When the local host is found other than at the start of a list of hosts,
5941 the local host, those with the same MX, and any that follow, are discarded.
5942 When the list in question was part of a longer list of hosts, the following
5943 hosts (not currently being processed) were also being discarded. This no
5944 longer happens. I'm not sure if this situation could ever has previously
5947 61. Added the "/MX" feature to lists of hosts in the manualroute and query
5950 62. Whenever Exim generates a new message, it now adds an Auto-Submitted:
5951 header. This is something that is recommended in a new Internet Draft, and
5952 is something that is documented as being done by Sendmail. There are two
5953 possible values. For messages generated by the autoreply transport, Exim
5956 Auto-Submitted: auto-replied
5958 whereas for all other generated messages (e.g. bounces) it adds
5960 Auto-Submitted: auto-generated
5962 63. The "personal" condition in filters now includes a test for the
5963 Auto-Submitted: header. If it contains the string "auto-" the message it
5964 not considered personal.
5966 64. Added rcpt_include_affixes as a generic transport option.
5968 65. Added queue_only_override (default true).
5970 66. Added the syslog_duplication option.
5972 67. If what should have been the first header line of a message consisted of
5973 a space followed by a colon, Exim was mis-interpreting it as a header line.
5974 It isn't of course - it is syntactically invalid and should therefore be
5975 treated as the start of the message body. The misbehaviour could have
5976 caused a number of strange effects, including loss of data in subsequent
5977 header lines, and spool format errors.
5979 68. Formerly, the AUTH parameter on a MAIL command was trusted only if the
5980 client host had authenticated. This control can now be exercised by an ACL
5981 for more flexibility.
5983 69. By default, callouts do not happen when testing with -bh. There is now a
5984 variant, -bhc, which does actually run the callout code, including
5985 consulting and updating the callout cache.
5987 70. Added support for saslauthd authentication, courtesy of Alexander
5990 71. If statvfs() failed on the spool or log directories while checking their
5991 size for availability, Exim confusingly gave the error "space shortage".
5992 Furthermore, in debugging mode it crashed with a floating point exception.
5993 These checks are done if check_{spool,log}_{space,inodes} are set, and when
5994 an SMTP message arrives with SIZE= on the MAIL command. As this is a really
5995 serious problem, Exim now writes to the main and panic logs when this
5996 happens, with details of the failure. It then refuses to accept the
5997 incoming message, giving the message "spool directory problem" or "log
5998 directory problem" with a 421 code for SMTP messages.
6000 72. When Exim is about to re-exec itself, it ensures that the file descriptors
6001 0, 1, and 2 exist, because some OS complain for execs without them (see
6002 ChangeLog 4.05/30). If necessary, Exim opens /dev/null to use for these
6003 descriptors. However, the code omitted to check that the open succeeded,
6004 causing mysterious errors if for some reason the permissions on /dev/null
6005 got screwed. Now Exim writes a message to the main and panic logs, and
6006 bombs out if it can't open /dev/null.
6008 73. Re-vamped the way daemon_smtp_port, local_interfaces, and -oX work and
6009 interact so that it is all more flexible. It is supposed to remain
6010 backwards compatible. Also added extra_local_interfaces.
6012 74. Invalid data sent to a SPA (NTLM) server authenticator could cause the code
6013 to bomb out with an assertion failure - to the client this appears as a
6014 connection drop. This problem occurs in the part of the code that was taken
6015 from the Samba project. Fortunately, the assertion is in a very simple
6016 function, so I have fixed this by reproducing the function inline in the
6017 one place where it is called, and arranging for authentication to fail
6018 instead of killing the process with assert().
6020 75. The SPA client code was not working when the server requested OEM rather
6021 than Unicode encoding.
6023 76. Added code to make require_files with a specific uid setting more usable in
6024 the case where statting the file as root fails - usually a non-root-mounted
6025 NFS file system. When this happens and the failure is EACCES, Exim now
6026 forks a subprocess and does the per-uid checking as the relevant uid.
6028 77. Added process_log_path.
6030 78. If log_file_path was not explicitly set, a setting of check_log_space or
6031 check_log_inodes was ignored.
6033 79. If a space check for the spool or log partitions fails, the incident is now
6034 logged. Of course, in the latter case the data may get lost...
6036 80. Added the %p formatting code to string_format() so that it can be used to
6037 print addresses in debug_print(). Adjusted all the address printing in the
6038 debugging in store.c to use %p rather than %d.
6040 81. There was a concern that a line of code in smtp_in.c could overflow a
6041 buffer if a HELO/EHLO command was given followed by 500 or so spaces. As
6042 initially expressed, the concern was not well-founded, because trailing
6043 spaces are removed early. However, if the trailing spaces were followed by
6044 a NULL, they did not get removed, so the overflow was possible. Two fixes
6047 (a) I re-wrote the offending code in a cleaner fashion.
6048 (b) If an incoming SMTP command contains a NULL character, it is rejected
6051 82. When Exim changes uid/gid to the Exim user at daemon start time, it now
6052 runs initgroups(), so that if the Exim user is in any additional groups,
6053 they will be used during message reception.
6059 The change log for 4.20 and earlier releases has been archived.
projects / exim.git / blob