1 Change log file for Exim from version 4.21
2 -------------------------------------------
12 TF/01 Correctly close the server side of TLS when forking for delivery.
14 When a message was received over SMTP with TLS, Exim failed to clear up
15 the incoming connection properly after forking off the child process to
16 deliver the message. In some situations the subsequent outgoing
17 delivery connection happened to have the same fd number as the incoming
18 connection previously had. Exim would try to use TLS and fail, logging
19 a "Bad file descriptor" error.
21 TF/02 Portability fix for building lookup modules on Solaris when the xpg4
22 utilities have not been installed.
24 JH/01 Fix memory-handling in use of acl as a conditional; avoid free of
25 temporary space as the ACL may create new global variables.
27 TL/01 LDAP support uses per connection or global context settings, depending
28 upon the detected version of the libraries at build time.
30 TL/02 Experimental Proxy Protocol support: allows a proxied SMTP connection
31 to extract and use the src ip:port in logging and expansions as if it
32 were a direct connection from the outside internet. PPv2 support was
33 updated based on HAProxy spec change in May 2014.
35 JH/02 Add ${listextract {number}{list}{success}{fail}}.
37 TL/03 Bugzilla 1433: Fix DMARC SEGV with specific From header contents.
38 Properly escape header and check for NULL return.
40 PP/01 Continue incomplete 4.82 PP/19 by fixing docs too: use dns_dnssec_ok
43 JH/03 Bugzilla 1157: support log_selector smtp_confirmation for lmtp.
45 TL/04 Add verify = header_names_ascii check to reject email with non-ASCII
46 characters in header names, implemented as a verify condition.
47 Contributed by Michael Fischer v. Mollard.
49 TL/05 Rename SPF condition results err_perm and err_temp to standardized
50 results permerror and temperror. Previous values are deprecated but
51 still accepted. In a future release, err_perm and err_temp will be
52 completely removed, which will be a backward incompatibility if the
53 ACL tests for either of these two old results. Patch contributed by
54 user bes-internal on the mailing list.
56 JH/04 Add ${utf8clean:} operator. Contributed by Alex Rau.
58 JH/05 Bugzilla 305: Log incoming-TLS details on rejects, subject to log
59 selectors, in both main and reject logs.
61 JH/06 Log outbound-TLS and port details, subject to log selectors, for a
64 JH/07 Add malware type "sock" for talking to simple daemon.
66 JH/08 Bugzilla 1371: Add tls_{,try_}verify_hosts to smtp transport.
68 JH/09 Bugzilla 1431: Support (with limitations) headers_add/headers_remove in
69 routers/transports under cutthrough routing.
71 JH/10 Bugzilla 1005: ACL "condition =" should accept values which are negative
72 numbers. Touch up "bool" conditional to keep the same definition.
74 TL/06 Remove duplicated language in spec file from 4.82 TL/16.
76 JH/11 Add dnsdb tlsa lookup. From Todd Lyons.
78 JH/12 Expand items in router/transport headers_add or headers_remove lists
79 individually rather than the list as a whole. Bug 1452.
81 Required for reasonable handling of multiple headers_ options when
82 they may be empty; requires that headers_remove items with embedded
83 colons must have them doubled (or the list-separator changed).
85 TL/07 Add new dmarc expansion variable $dmarc_domain_policy to directly
86 view the policy declared in the DMARC record. Currently, $dmarc_status
87 is a combined value of both the record presence and the result of the
90 JH/13 Fix handling of $tls_cipher et.al. in (non-verify) transport. Bug 1455.
92 JH/14 New options dnssec_request_domains, dnssec_require_domains on the
93 dnslookup router and the smtp transport (applying to the forward
96 TL/08 Bugzilla 1453: New LDAP "SERVERS=" option allows admin to override list
97 of ldap servers used for a specific lookup. Patch provided by Heiko
100 JH/18 New options dnssec_lax, dnssec_strict on dnsdb lookups.
101 New variable $lookup_dnssec_authenticated for observability.
103 TL/09 Bugzilla 609: Add -C option to exiqgrep, specify which exim.conf to use.
104 Patch submitted by Lars Timman.
106 JH/19 EXPERIMENTAL_OCSP support under GnuTLS. Bug 1459.
108 TL/10 Bugzilla 1454: New -oMm option to pass message reference to Exim.
109 Requires trusted mode and valid format message id, aborts otherwise.
110 Patch contributed by Heiko Schlichting.
112 JH/20 New expansion variables tls_(in,out)_(our,peer)cert, and expansion item
113 certextract with support for various fields. Bug 1358.
115 JH/21 Observability of OCSP via variables tls_(in,out)_ocsp. Stapling
116 is requested by default, modifiable by smtp transport option
119 JH/22 Expansion operators ${md5:string} and ${sha1:string} can now
120 operate on certificate variables to give certificate fingerprints
121 Also new ${sha256:cert_variable}.
123 JH/23 The PRDR feature is moved from being Experimental into the mainline.
125 TL/11 Bug 1119: fix memory allocation in string_printing2(). Patch from
126 Christian Aistleitner.
128 JH/24 The OCSP stapling feature is moved from Experimental into the mainline.
130 TL/12 Bug 1444: Fix improper \r\n sequence handling when writing spool
131 file. Patch from Wolfgang Breyha.
133 JH/25 Expand the coverage of the delivery $host and $host_address to
134 client authenticators run in verify callout. Bug 1476.
136 JH/26 Port service names are now accepted for tls_on_connect_ports, to
137 align with daemon_smtp_ports. Bug 72.
139 TF/03 Fix udpsend. The ip_connectedsocket() function's socket type
140 support and error reporting did not work properly.
142 TL/13 Bug 1495: Exiqgrep check if -C config file specified on cli exists
143 and is readable. Patch from Andrew Colin Kissa.
145 TL/14 Enhance documentation of ${run expansion and how it parses the
146 commandline after expansion, particularly in the case when an
147 unquoted variable expansion results in an empty value.
149 JH/27 The TLS SNI feature was broken in 4.82. Fix it.
151 PP/02 Fix internal collision of T_APL on systems which support RFC3123
152 by renaming away from it. Addresses GH issue 15, reported by
155 JH/28 Fix parsing of MIME headers for parameters with quoted semicolons.
157 TL/15 SECURITY: prevent double expansion in math comparison functions
158 (can expand unsanitized data). Not remotely exploitable.
165 PP/01 Add -bI: framework, and -bI:sieve for querying sieve capabilities.
167 PP/02 Make -n do something, by making it not do something.
168 When combined with -bP, the name of an option is not output.
170 PP/03 Added tls_dh_min_bits SMTP transport driver option, only honoured
173 PP/04 First step towards DNSSEC, provide $sender_host_dnssec for
174 $sender_host_name and config options to manage this, and basic check
177 PP/05 DSCP support for outbound connections and control modifier for inbound.
179 PP/06 Cyrus SASL: set local and remote IP;port properties for driver.
180 (Only plugin which currently uses this is kerberos4, which nobody should
181 be using, but we should make it available and other future plugins might
182 conceivably use it, even though it would break NAT; stuff *should* be
183 using channel bindings instead).
185 PP/07 Handle "exim -L <tag>" to indicate to use syslog with tag as the process
186 name; added for Sendmail compatibility; requires admin caller.
187 Handle -G as equivalent to "control = suppress_local_fixups" (we used to
188 just ignore it); requires trusted caller.
189 Also parse but ignore: -Ac -Am -X<logfile>
192 TL/01 Bugzilla 1258 - Refactor MAIL FROM optional args processing.
194 TL/02 Add +smtp_confirmation as a default logging option.
196 TL/03 Bugzilla 198 - Implement remove_header ACL modifier.
197 Patch by Magnus Holmgren from 2007-02-20.
199 TL/04 Bugzilla 1281 - Spec typo.
200 Bugzilla 1283 - Spec typo.
201 Bugzilla 1290 - Spec grammar fixes.
203 TL/05 Bugzilla 1285 - Spec omission, fix docbook errors for spec.txt creation.
205 TL/06 Add Experimental DMARC support using libopendmarc libraries.
207 TL/07 Fix an out of order global option causing a segfault. Reported to dev
208 mailing list by by Dmitry Isaikin.
210 JH/01 Bugzilla 1201 & 304 - New cutthrough-delivery feature, with TLS support.
212 JH/02 Support "G" suffix to numbers in ${if comparisons.
214 PP/08 Handle smtp transport tls_sni option forced-fail for OpenSSL.
216 NM/01 Bugzilla 1197 - Spec typo
217 Bugzilla 1196 - Spec examples corrections
219 JH/03 Add expansion operators ${listnamed:name} and ${listcount:string}
221 PP/09 Add gnutls_allow_auto_pkcs11 option (was originally called
222 gnutls_enable_pkcs11, but renamed to more accurately indicate its
225 PP/10 Let Linux makefile inherit CFLAGS/CFLAGS_DYNAMIC.
226 Pulled from Debian 30_dontoverridecflags.dpatch by Andreas Metzler.
228 JH/04 Add expansion item ${acl {name}{arg}...}, expansion condition
229 "acl {{name}{arg}...}", and optional args on acl condition
232 JH/05 Permit multiple router/transport headers_add/remove lines.
234 JH/06 Add dnsdb pseudo-lookup "a+" to do an "aaaa" + "a" combination.
236 JH/07 Avoid using a waiting database for a single-message-only transport.
237 Performance patch from Paul Fisher. Bugzilla 1262.
239 JH/08 Strip leading/trailing newlines from add_header ACL modifier data.
242 JH/09 Add $headers_added variable, with content from use of ACL modifier
243 add_header (but not yet added to the message). Bugzilla 199.
245 JH/10 Add 8bitmime log_selector, for 8bitmime status on the received line.
246 Pulled from Bugzilla 817 by Wolfgang Breyha.
248 PP/11 SECURITY: protect DKIM DNS decoding from remote exploit.
250 (nb: this is the same fix as in Exim 4.80.1)
252 JH/11 Add A= logging on delivery lines, and a client_set_id option on
255 JH/12 Add optional authenticated_sender logging to A= and a log_selector
258 PP/12 Unbreak server_set_id for NTLM/SPA auth, broken by 4.80 PP/29.
260 PP/13 Dovecot auth: log better reason to rejectlog if Dovecot did not
261 advertise SMTP AUTH mechanism to us, instead of a generic
262 protocol violation error. Also, make Exim more robust to bad
263 data from the Dovecot auth socket.
265 TF/01 Fix ultimate retry timeouts for intermittently deliverable recipients.
267 When a queue runner is handling a message, Exim first routes the
268 recipient addresses, during which it prunes them based on the retry
269 hints database. After that it attempts to deliver the message to
270 any remaining recipients. It then updates the hints database using
273 So if a recipient address works intermittently, it can get repeatedly
274 deferred at routing time. The retry hints record remains fresh so the
275 address never reaches the final cutoff time.
277 This is a fairly common occurrence when a user is bumping up against
278 their storage quota. Exim had some logic in its local delivery code
279 to deal with this. However it did not apply to per-recipient defers
280 in remote deliveries, e.g. over LMTP to a separate IMAP message store.
282 This change adds a proper retry rule check during routing so that the
283 final cutoff time is checked against the message's age. We only do
284 this check if there is an address retry record and there is not a
285 domain retry record; this implies that previous attempts to handle
286 the address had the retry_use_local_parts option turned on. We use
287 this as an approximation for the destination being like a local
288 delivery, as in LMTP.
290 I suspect this new check makes the old local delivery cutoff check
291 redundant, but I have not verified this so I left the code in place.
293 TF/02 Correct gecos expansion when From: is a prefix of the username.
295 Test 0254 submits a message to Exim with the header
299 When I ran the test suite under the user fanf2, Exim expanded
300 the header to contain my full name, whereas it should have added
301 a Resent-Sender: header. It erroneously treats any prefix of the
302 username as equal to the username.
304 This change corrects that bug.
306 GF/01 DCC debug and logging tidyup
307 Error conditions log to paniclog rather than rejectlog.
308 Debug lines prefixed by "DCC: " to remove any ambiguity.
310 TF/03 Avoid unnecessary rebuilds of lookup-related code.
312 PP/14 Fix OCSP reinitialisation in SNI handling for Exim/TLS as server.
313 Bug spotted by Jeremy Harris; was flawed since initial commit.
314 Would have resulted in OCSP responses post-SNI triggering an Exim
315 NULL dereference and crash.
317 JH/13 Add $router_name and $transport_name variables. Bugzilla 308.
319 PP/15 Define SIOCGIFCONF_GIVES_ADDR for GNU Hurd.
320 Bug detection, analysis and fix by Samuel Thibault.
321 Bugzilla 1331, Debian bug #698092.
323 SC/01 Update eximstats to watch out for senders sending 'HELO [IpAddr]'
325 JH/14 SMTP PRDR (http://www.eric-a-hall.com/specs/draft-hall-prdr-00.txt).
326 Server implementation by Todd Lyons, client by JH.
327 Only enabled when compiled with EXPERIMENTAL_PRDR. A new
328 config variable "prdr_enable" controls whether the server
329 advertises the facility. If the client requests PRDR a new
330 acl_data_smtp_prdr ACL is called once for each recipient, after
331 the body content is received and before the acl_smtp_data ACL.
332 The client is controlled by bolth of: a hosts_try_prdr option
333 on the smtp transport, and the server advertisement.
334 Default client logging of deliveries and rejections involving
335 PRDR are flagged with the string "PRDR".
337 PP/16 Fix problems caused by timeouts during quit ACLs trying to double
338 fclose(). Diagnosis by Todd Lyons.
340 PP/17 Update configure.default to handle IPv6 localhost better.
341 Patch by Alain Williams (plus minor tweaks).
344 PP/18 OpenSSL made graceful with empty tls_verify_certificates setting.
345 This is now consistent with GnuTLS, and is now documented: the
346 previous undocumented portable approach to treating the option as
347 unset was to force an expansion failure. That still works, and
348 an empty string is now equivalent.
350 PP/19 Renamed DNSSEC-enabling option to "dns_dnssec_ok", to make it
351 clearer that Exim is using the DO (DNSSEC OK) EDNS0 resolver flag,
352 not performing validation itself.
354 PP/20 Added force_command boolean option to pipe transport.
355 Patch from Nick Koston, of cPanel Inc.
357 JH/15 AUTH support on callouts (and hence cutthrough-deliveries).
360 TF/04 Added udpsend ACL modifer and hexquote expansion operator
362 PP/21 Fix eximon continuous updating with timestamped log-files.
363 Broken in a format-string cleanup in 4.80, missed when I repaired the
364 other false fix of the same issue.
365 Report and fix from Heiko Schlichting.
368 PP/22 Guard LDAP TLS usage against Solaris LDAP variant.
369 Report from Prashanth Katuri.
371 PP/23 Support safari_ecdhe_ecdsa_bug for openssl_options.
372 It's SecureTransport, so affects any MacOS clients which use the
373 system-integrated TLS libraries, including email clients.
375 PP/24 Fix segfault from trying to fprintf() to a NULL stdio FILE* if
376 using a MIME ACL for non-SMTP local injection.
377 Report and assistance in diagnosis by Warren Baker.
379 TL/08 Adjust exiqgrep to be case-insensitive for sender/receiver.
381 JH/16 Fix comparisons for 64b. Bugzilla 1385.
383 TL/09 Add expansion variable $authenticated_fail_id to keep track of
384 last id that failed so it may be referenced in subsequent ACL's.
386 TL/10 Bugzilla 1375 - Prevent TLS rebinding in ldap. Patch provided by
389 TL/11 Bugzilla 1382 - Option ldap_require_cert overrides start_tls
390 ldap library initialization, allowing self-signed CA's to be
391 used. Also properly sets require_cert option later in code by
392 using NULL (global ldap config) instead of ldap handle (per
393 session). Bug diagnosis and testing by alxgomz.
395 TL/12 Enhanced documentation in the ratelimit.pl script provided in
396 the src/util/ subdirectory.
398 TL/13 Bug 1031 - Imported transport SQL logging patch from Axel Rau
399 renamed to Transport Post Delivery Action by Jeremy Harris, as
402 TL/14 Bugzilla 1217 - Redis lookup support has been added. It is only enabled
403 when Exim is compiled with EXPERIMENTAL_REDIS. A new config variable
404 redis_servers = needs to be configured which will be used by the redis
405 lookup. Patch from Warren Baker, of The Packet Hub.
407 TL/15 Fix exiqsumm summary for corner case. Patch provided by Richard Hall.
409 TL/16 Bugzilla 1289 - Clarify host/ip processing when have errors looking up a
410 hostname or reverse DNS when processing a host list. Used suggestions
411 from multiple comments on this bug.
413 TL/17 Bugzilla 1057 - Multiple clamd TCP targets patch from Mark Zealey.
415 TL/18 Had previously added a -CONTINUE option to runtest in the test suite.
416 Missed a few lines, added it to make the runtest require no keyboard
419 TL/19 Bugzilla 1402 - Test 533 fails if any part of the path to the test suite
420 contains upper case chars. Make router use caseful_local_part.
422 TL/20 Bugzilla 1400 - Add AVOID_GNUTLS_PKCS11 build option. Allows GnuTLS
423 support when GnuTLS has been built with p11-kit.
429 PP/01 SECURITY: protect DKIM DNS decoding from remote exploit.
431 This, or similar/improved, will also be change PP/11 of 4.82.
437 PP/01 Handle short writes when writing local log-files.
438 In practice, only affects FreeBSD (8 onwards).
439 Bugzilla 1053, with thanks to Dmitry Isaikin.
441 NM/01 Bugzilla 949 - Documentation tweak
443 NM/02 Bugzilla 1093 - eximstats DATA reject detection regexps
446 NM/03 Bugzilla 1169 - primary_hostname spelling was incorrect in docs.
448 PP/02 Implemented gsasl authenticator.
450 PP/03 Implemented heimdal_gssapi authenticator with "server_keytab" option.
452 PP/04 Local/Makefile support for (AUTH|LOOKUP)_*_PC=foo to use
453 `pkg-config foo` for cflags/libs.
455 PP/05 Swapped $auth1/$auth2 for gsasl GSSAPI mechanism, to be more consistent
456 with rest of GSASL and with heimdal_gssapi.
458 PP/06 Local/Makefile support for USE_(GNUTLS|OPENSSL)_PC=foo to use
459 `pkg-config foo` for cflags/libs for the TLS implementation.
461 PP/07 New expansion variable $tls_bits; Cyrus SASL server connection
462 properties get this fed in as external SSF. A number of robustness
463 and debugging improvements to the cyrus_sasl authenticator.
465 PP/08 cyrus_sasl server now expands the server_realm option.
467 PP/09 Bugzilla 1214 - Log authentication information in reject log.
468 Patch by Jeremy Harris.
470 PP/10 Added dbmjz lookup type.
472 PP/11 Let heimdal_gssapi authenticator take a SASL message without an authzid.
474 PP/12 MAIL args handles TAB as well as SP, for better interop with
475 non-compliant senders.
476 Analysis and variant patch by Todd Lyons.
478 NM/04 Bugzilla 1237 - fix cases where printf format usage not indicated
479 Bug report from Lars Müller <lars@samba.org> (via SUSE),
480 Patch from Dirk Mueller <dmueller@suse.com>
482 PP/13 tls_peerdn now print-escaped for spool files.
483 Observed some $tls_peerdn in wild which contained \n, which resulted
484 in spool file corruption.
486 PP/14 TLS fixes for OpenSSL: support TLS 1.1 & 1.2; new "openssl_options"
487 values; set SSL_MODE_AUTO_RETRY so that OpenSSL will retry a read
488 or write after TLS renegotiation, which otherwise led to messages
491 TK/01 Bugzilla 1239 - fix DKIM verification when signature was not inserted
492 as a tracking header (ie: a signed header comes before the signature).
493 Patch from Wolfgang Breyha.
495 JH/01 Bugzilla 660 - Multi-valued attributes from ldap now parseable as a
496 comma-sep list; embedded commas doubled.
498 JH/02 Refactored ACL "verify =" logic to table-driven dispatch.
500 PP/15 LDAP: Check for errors of TLS initialisation, to give correct
502 Report and patch from Dmitry Banschikov.
504 PP/16 Removed "dont_insert_empty_fragments" fron "openssl_options".
505 Removed SSL_clear() after SSL_new() which led to protocol negotiation
506 failures. We appear to now support TLS1.1+ with Exim.
508 PP/17 OpenSSL: new expansion var $tls_sni, which if used in tls_certificate
509 lets Exim select keys and certificates based upon TLS SNI from client.
510 Also option tls_sni on SMTP Transports. Also clear $tls_bits correctly
511 before an outbound SMTP session. New log_selector, +tls_sni.
513 PP/18 Bugzilla 1122 - check localhost_number expansion for failure, avoid
514 NULL dereference. Report and patch from Alun Jones.
516 PP/19 DNS resolver init changes for NetBSD compatibility. (Risk of breakage
517 on less well tested platforms). Obviates NetBSD pkgsrc patch-ac.
518 Not seeing resolver debug output on NetBSD, but suspect this is a
519 resolver implementation change.
521 PP/20 Revert part of NM/04, it broke log_path containing %D expansions.
522 Left warnings. Added "eximon gdb" invocation mode.
524 PP/21 Defaulting "accept_8bitmime" to true, not false.
526 PP/22 Added -bw for inetd wait mode support.
528 PP/23 Added PCRE_CONFIG=yes support to Makefile for using pcre-config to
529 locate the relevant includes and libraries. Made this the default.
531 PP/24 Fixed headers_only on smtp transports (was not sending trailing dot).
532 Bugzilla 1246, report and most of solution from Tomasz Kusy.
534 JH/03 ${eval } now uses 64-bit and supports a "g" suffix (like to "k" and "m").
535 This may cause build issues on older platforms.
537 PP/25 Revamped GnuTLS support, passing tls_require_ciphers to
538 gnutls_priority_init, ignoring Exim options gnutls_require_kx,
539 gnutls_require_mac & gnutls_require_protocols (no longer supported).
540 Added SNI support via GnuTLS too.
541 Made ${randint:..} supplier available, if using not-too-old GnuTLS.
543 PP/26 Added EXPERIMENTAL_OCSP for OpenSSL.
545 PP/27 Applied dnsdb SPF support patch from Janne Snabb.
546 Applied second patch from Janne, implementing suggestion to default
547 multiple-strings-in-record handling to match SPF spec.
549 JH/04 Added expansion variable $tod_epoch_l for a higher-precision time.
551 PP/28 Fix DCC dcc_header content corruption (stack memory referenced,
552 read-only, out of scope).
553 Patch from Wolfgang Breyha, report from Stuart Northfield.
555 PP/29 Fix three issues highlighted by clang analyser static analysis.
556 Only crash-plausible issue would require the Cambridge-specific
557 iplookup router and a misconfiguration.
558 Report from Marcin Mirosław.
560 PP/30 Another attempt to deal with PCRE_PRERELEASE, this one less buggy.
562 PP/31 %D in printf continues to cause issues (-Wformat=security), so for
563 now guard some of the printf checks behind WANT_DEEPER_PRINTF_CHECKS.
564 As part of this, removing so much warning spew let me fix some minor
565 real issues in debug logging.
567 PP/32 GnuTLS was always using default tls_require_ciphers, due to a missing
568 assignment on my part. Fixed.
570 PP/33 Added tls_dh_max_bits option, defaulting to current hard-coded limit
571 of NSS, for GnuTLS/NSS interop. Problem root cause diagnosis by
572 Janne Snabb (who went above and beyond: thank you).
574 PP/34 Validate tls_require_ciphers on startup, since debugging an invalid
575 string otherwise requires a connection and a bunch more work and it's
576 relatively easy to get wrong. Should also expose TLS library linkage
579 PP/35 Pull in <features.h> on Linux, for some portability edge-cases of
580 64-bit ${eval} (JH/03).
582 PP/36 Define _GNU_SOURCE in exim.h; it's needed for some releases of
583 GNU libc to support some of the 64-bit stuff, should not lead to
584 conflicts. Defined before os.h is pulled in, so if a given platform
585 needs to override this, it can.
587 PP/37 Unbreak Cyrus SASL auth: SSF retrieval was incorrect, Exim thought
588 protection layer was required, which is not implemented.
589 Bugzilla 1254, patch from Wolfgang Breyha.
591 PP/38 Overhaul DH prime handling, supply RFC-specified DH primes as built
592 into Exim, default to IKE id 23 from RFC 5114 (2048 bit). Make
593 tls_dhparam take prime identifiers. Also unbreak combination of
594 OpenSSL+DH_params+TLSSNI.
596 PP/39 Disable SSLv2 by default in OpenSSL support.
602 PP/01 Solaris build fix for Oracle's LDAP libraries.
603 Bugzilla 1109, patch from Stephen Usher.
605 TF/01 HP/UX build fix: avoid arithmetic on a void pointer.
607 TK/01 DKIM Verification: Fix relaxed canon for empty headers w/o
610 TF/02 Fix a couple more cases where we did not log the error message
611 when unlink() failed. See also change 4.74-TF/03.
613 TF/03 Make the exiwhat support code safe for signals. Previously Exim might
614 lock up or crash if it happened to be inside a call to libc when it
615 got a SIGUSR1 from exiwhat.
617 The SIGUSR1 handler appends the current process status to the process
618 log which is later printed by exiwhat. It used to use the general
619 purpose logging code to do this, but several functions it calls are
620 not safe for signals.
622 The new output code in the SIGUSR1 handler is specific to the process
623 log, and simple enough that it's easy to inspect for signal safety.
624 Removing some special cases also simplifies the general logging code.
625 Removing the spurious timestamps from the process log simplifies
628 TF/04 Improved ratelimit ACL condition.
630 The /noupdate option has been deprecated in favour of /readonly which
631 has clearer semantics. The /leaky, /strict, and /readonly update modes
632 are mutually exclusive. The update mode is no longer included in the
633 database key; it just determines when the database is updated. (This
634 means that when you upgrde Exim will forget old rate measurements.)
636 Exim now checks that the per_* options are used with an update mode that
637 makes sense for the current ACL. For example, when Exim is processing a
638 message (e.g. acl_smtp_rcpt or acl_smtp_data, etc.) you can specify
639 per_mail/leaky or per_mail/strict; otherwise (e.g. in acl_smtp_helo) you
640 must specify per_mail/readonly. If you omit the update mode it defaults to
641 /leaky where that makes sense (as before) or /readonly where required.
643 The /noupdate option is now undocumented but still supported for
644 backwards compatibility. It is equivalent to /readonly except that in
645 ACLs where /readonly is required you may specify /leaky/noupdate or
646 /strict/noupdate which are treated the same as /readonly.
648 A useful new feature is the /count= option. This is a generalization
649 of the per_byte option, so that you can measure the throughput of other
650 aggregate values. For example, the per_byte option is now equivalent
651 to per_mail/count=${if >{0}{$message_size} {0} {$message_size} }.
653 The per_rcpt option has been generalized using the /count= mechanism
654 (though it's more complicated than the per_byte equivalence). When it is
655 used in acl_smtp_rcpt, the per_rcpt option adds recipients to the
656 measured rate one at a time; if it is used later (e.g. in acl_smtp_data)
657 or in a non-SMTP ACL it adds all the recipients in one go. (The latter
658 /count=$recipients_count behaviour used to work only in non-SMTP ACLs.)
659 Note that using per_rcpt with a non-readonly update mode in more than
660 one ACL will cause the recipients to be double-counted. (The per_mail
661 and per_byte options don't have this problem.)
663 The handling of very low rates has changed slightly. If the computed rate
664 is less than the event's count (usually one) then this event is the first
665 after a long gap. In this case the rate is set to the same as this event's
666 count, so that the first message of a spam run is counted properly.
668 The major new feature is a mechanism for counting the rate of unique
669 events. The new per_addr option counts the number of different
670 recipients that someone has sent messages to in the last time period. It
671 behaves like per_rcpt if all the recipient addresses are different, but
672 duplicate recipient addresses do not increase the measured rate. Like
673 the /count= option this is a general mechanism, so the per_addr option
674 is equivalent to per_rcpt/unique=$local_part@$domain. You can, for
675 example, measure the rate that a client uses different sender addresses
676 with the options per_mail/unique=$sender_address. There are further
677 details in the main documentation.
679 TF/05 Removed obsolete $Cambridge$ CVS revision strings.
681 TF/06 Removed a few PCRE remnants.
683 TF/07 Automatically extract Exim's version number from tags in the git
684 repository when doing development or release builds.
686 PP/02 Raise smtp_cmd_buffer_size to 16kB.
687 Bugzilla 879. Patch from Paul Fisher.
689 PP/03 Implement SSL-on-connect outbound with protocol=smtps on smtp transport.
690 Heavily based on revision 40f9a89a from Simon Arlott's tree.
693 PP/04 Use .dylib instead of .so for dynamic library loading on MacOS.
695 PP/05 Variable $av_failed, true if the AV scanner deferred.
696 Bugzilla 1078. Patch from John Horne.
698 PP/06 Stop make process more reliably on build failure.
699 Bugzilla 1087. Patch from Heiko Schlittermann.
701 PP/07 Make maildir_use_size_file an _expandable_ boolean.
702 Bugzilla 1089. Patch from Heiko Schlittermann.
704 PP/08 Handle ${run} returning more data than OS pipe buffer size.
705 Bugzilla 1131. Patch from Holger Weiß.
707 PP/09 Handle IPv6 addresses with SPF.
708 Bugzilla 860. Patch from Wolfgang Breyha.
710 PP/10 GnuTLS: support TLS 1.2 & 1.1.
712 Use gnutls_certificate_verify_peers2() [patch from Andreas Metzler].
715 PP/11 match_* no longer expand right-hand-side by default.
716 New compile-time build option, EXPAND_LISTMATCH_RHS.
717 New expansion conditions, "inlist", "inlisti".
719 PP/12 fix uninitialised greeting string from PP/03 (smtps client support).
721 PP/13 shell and compiler warnings fixes for RC1-RC4 changes.
723 PP/14 fix log_write() format string regression from TF/03.
724 Bugzilla 1152. Patch from Dmitry Isaikin.
730 PP/01 The new ldap_require_cert option would segfault if used. Fixed.
732 PP/02 Harmonised TLS library version reporting; only show if debugging.
733 Layout now matches that introduced for other libraries in 4.74 PP/03.
735 PP/03 New openssl_options items: no_sslv2 no_sslv3 no_ticket no_tlsv1
737 PP/04 New "dns_use_edns0" global option.
739 PP/05 Don't segfault on misconfiguration of ref:name exim-user as uid.
742 PP/06 Extra paranoia around buffer usage at the STARTTLS transition.
743 nb: Exim is not vulnerable to http://www.kb.cert.org/vuls/id/555316
745 TK/01 Updated PolarSSL code to 0.14.2.
746 Bugzilla 1097. Patch from Andreas Metzler.
748 PP/07 Catch divide-by-zero in ${eval:...}.
751 PP/08 Condition negation of bool{}/bool_lax{} did not negate. Fixed.
754 TK/02 Bugzilla 1106: CVE-2011-1764 - DKIM log line was subject to a
755 format-string attack -- SECURITY: remote arbitrary code execution.
757 TK/03 SECURITY - DKIM signature header parsing was double-expanded, second
758 time unintentionally subject to list matching rules, letting the header
759 cause arbitrary Exim lookups (of items which can occur in lists, *not*
760 arbitrary string expansion). This allowed for information disclosure.
762 PP/09 Fix another SIGFPE (x86) in ${eval:...} expansion, this time related to
763 INT_MIN/-1 -- value coerced to INT_MAX.
769 NM/01 Workround for PCRE version dependency in version reporting
772 TF/01 Update valgrind.h and memcheck.h to copies from valgrind-3.6.0.
773 This fixes portability to compilers other than gcc, notably
774 Solaris CC and HP-UX CC. Fixes Bugzilla 1050.
776 TF/02 Bugzilla 139: Avoid using the += operator in the modular lookup
777 makefiles for portability to HP-UX and POSIX correctness.
779 PP/01 Permit LOOKUP_foo enabling on the make command-line.
780 Also via indented variable definition in the Makefile.
781 (Debugging by Oliver Heesakkers).
783 PP/02 Restore caching of spamd results with expanded spamd_address.
784 Patch from author of expandable spamd_address patch, Wolfgang Breyha.
786 PP/03 Build issue: lookups-Makefile now exports LC_ALL=C
787 Improves build reliability. Fix from: Frank Elsner
789 NM/02 Fix wide character breakage in the rfc2047 coding
790 Fixes bug 1064. Patch from Andrey N. Oktyabrski
792 NM/03 Allow underscore in dnslist lookups
793 Fixes bug 1026. Patch from Graeme Fowler
795 PP/04 Bugzilla 230: Support TLS-enabled LDAP (in addition to ldaps).
796 Code patches from Adam Ciarcinski of NetBSD.
798 NM/04 Fixed exiqgrep to cope with mailq missing size issue
801 PP/05 Bugzilla 1083: when lookup expansion defers, escape the output which
802 is logged, to avoid truncation. Patch from John Horne.
804 PP/06 Bugzilla 1042: implement freeze_signal on pipe transports.
805 Patch from Jakob Hirsch.
807 PP/07 Bugzilla 1061: restrict error messages sent over SMTP to not reveal
808 SQL string expansion failure details.
809 Patch from Andrey Oktyabrski.
811 PP/08 Bugzilla 486: implement %M datestamping in log filenames.
812 Patch from Simon Arlott.
814 PP/09 New lookups functionality failed to compile on old gcc which rejects
815 extern declarations in function scope.
816 Patch from Oliver Fleischmann
818 PP/10 Use sig_atomic_t for flags set from signal handlers.
819 Check getgroups() return and improve debugging.
820 Fixed developed for diagnosis in bug 927 (which turned out to be
823 PP/11 Bugzilla 1055: Update $message_linecount for maildir_tag.
824 Patch from Mark Zealey.
826 PP/12 Bugzilla 1056: Improved spamd server selection.
827 Patch from Mark Zealey.
829 PP/13 Bugzilla 1086: Deal with maildir quota file races.
830 Based on patch from Heiko Schlittermann.
832 PP/14 Bugzilla 1019: DKIM multiple signature generation fix.
833 Patch from Uwe Doering, sign-off by Michael Haardt.
835 NM/05 Fix to spam.c to accommodate older gcc versions which dislike
836 variable declaration deep within a block. Bug and patch from
839 PP/15 lookups-Makefile IRIX compatibilty coercion.
841 PP/16 Make DISABLE_DKIM build knob functional.
843 NM/06 Bugzilla 968: child_open_uid: restore default SIGPIPE handler
844 Patch by Simon Arlott
846 TF/03 Fix valgrind.h portability to C89 compilers that do not support
847 variable argument macros. Our copy now differs from upstream.
853 TF/01 Failure to get a lock on a hints database can have serious
854 consequences so log it to the panic log.
856 TF/02 Log LMTP confirmation messages in the same way as SMTP,
857 controlled using the smtp_confirmation log selector.
859 TF/03 Include the error message when we fail to unlink a spool file.
861 DW/01 Bugzilla 139: Support dynamically loaded lookups as modules.
862 With thanks to Steve Haslam, Johannes Berg & Serge Demonchaux
863 for maintaining out-of-tree patches for some time.
865 PP/01 Bugzilla 139: Documentation and portability issues.
866 Avoid GNU Makefile-isms, let Exim continue to build on BSD.
867 Handle per-OS dynamic-module compilation flags.
869 PP/02 Let /dev/null have normal permissions.
870 The 4.73 fixes were a little too stringent and complained about the
871 permissions on /dev/null. Exempt it from some checks.
872 Reported by Andreas M. Kirchwitz.
874 PP/03 Report version information for many libraries, including
875 Exim version information for dynamically loaded libraries. Created
876 version.h, now support a version extension string for distributors
877 who patch heavily. Dynamic module ABI change.
879 PP/04 CVE-2011-0017 - check return value of setuid/setgid. This is a
880 privilege escalation vulnerability whereby the Exim run-time user
881 can cause root to append content of the attacker's choosing to
884 PP/05 Bugzilla 1041: merged DCC maintainer's fixes for return code.
887 PP/06 Bugzilla 1071: fix delivery logging with untrusted macros.
888 If dropping privileges for untrusted macros, we disabled normal logging
889 on the basis that it would fail; for the Exim run-time user, this is not
890 the case, and it resulted in successful deliveries going unlogged.
891 Fixed. Reported by Andreas Metzler.
897 PP/01 Date: & Message-Id: revert to normally being appended to a message,
898 only prepend for the Resent-* case. Fixes regression introduced in
899 Exim 4.70 by NM/22 for Bugzilla 607.
901 PP/02 Include check_rfc2047_length in configure.default because we're seeing
902 increasing numbers of administrators be bitten by this.
904 JJ/01 Added DISABLE_DKIM and comment to src/EDITME
906 PP/03 Bugzilla 994: added openssl_options main configuration option.
908 PP/04 Bugzilla 995: provide better SSL diagnostics on failed reads.
910 PP/05 Bugzilla 834: provide a permit_coredump option for pipe transports.
912 PP/06 Adjust NTLM authentication to handle SASL Initial Response.
914 PP/07 If TLS negotiated an anonymous cipher, we could end up with SSL but
915 without a peer certificate, leading to a segfault because of an
916 assumption that peers always have certificates. Be a little more
917 paranoid. Problem reported by Martin Tscholak.
919 PP/08 Bugzilla 926: switch ClamAV to use the new zINSTREAM API for content
920 filtering; old API available if built with WITH_OLD_CLAMAV_STREAM=yes
921 NB: ClamAV planning to remove STREAM in "middle of 2010".
922 CL also introduces -bmalware, various -d+acl logging additions and
923 more caution in buffer sizes.
925 PP/09 Implemented reverse_ip expansion operator.
927 PP/10 Bugzilla 937: provide a "debug" ACL control.
929 PP/11 Bugzilla 922: Documentation dusting, patch provided by John Horne.
931 PP/12 Bugzilla 973: Implement --version.
933 PP/13 Bugzilla 752: Refuse to build/run if Exim user is root/0.
935 PP/14 Build without WITH_CONTENT_SCAN. Path from Andreas Metzler.
937 PP/15 Bugzilla 816: support multiple condition rules on Routers.
939 PP/16 Add bool_lax{} expansion operator and use that for combining multiple
940 condition rules, instead of bool{}. Make both bool{} and bool_lax{}
941 ignore trailing whitespace.
943 JJ/02 prevent non-panic DKIM error from being sent to paniclog
945 JJ/03 added tcp_wrappers_daemon_name to allow host entries other than
948 PP/17 Fix malware regression for cmdline scanner introduced in PP/08.
949 Notification from Dr Andrew Aitchison.
951 PP/18 Change ClamAV response parsing to be more robust and to handle ClamAV's
952 ExtendedDetectionInfo response format.
953 Notification from John Horne.
955 PP/19 OpenSSL 1.0.0a compatibility const-ness change, should be backwards
958 PP/20 Added a CONTRIBUTING file. Fixed the documentation build to use http:
959 XSL and documented dependency on system catalogs, with examples of how
962 DW/21 Added Valgrind hooks in store.c to help it capture out-of-bounds store
965 DW/22 Bugzilla 1044: CVE-2010-4345 - partial fix: restrict default behaviour
966 of CONFIGURE_OWNER and CONFIGURE_GROUP options to no longer allow a
967 configuration file which is writeable by the Exim user or group.
969 DW/23 Bugzilla 1044: CVE-2010-4345 - part two: extend checks for writeability
970 of configuration files to cover files specified with the -C option if
971 they are going to be used with root privileges, not just the default
974 DW/24 Bugzilla 1044: CVE-2010-4345 - part three: remove ALT_CONFIG_ROOT_ONLY
975 option (effectively making it always true).
977 DW/25 Add TRUSTED_CONFIG_PREFIX_FILE option to allow alternative configuration
978 files to be used while preserving root privileges.
980 DW/26 Set FD_CLOEXEC on SMTP sockets after forking in the daemon, to ensure
981 that rogue child processes cannot use them.
983 PP/27 Bugzilla 1047: change the default for system_filter_user to be the Exim
984 run-time user, instead of root.
986 PP/28 Add WHITELIST_D_MACROS option to let some macros be overridden by the
987 Exim run-time user without dropping privileges.
989 DW/29 Remove use of va_copy() which breaks pre-C99 systems. Duplicate the
990 result string, instead of calling string_vformat() twice with the same
993 DW/30 Allow TRUSTED_CONFIG_PREFIX_FILE only for Exim or CONFIGURE_OWNER, not
994 for other users. Others should always drop root privileges if they use
995 -C on the command line, even for a whitelisted configure file.
997 DW/31 Turn TRUSTED_CONFIG_PREFIX_FILE into TRUSTED_CONFIG_FILE. No prefixes.
999 NM/01 Fixed bug #1002 - Message loss when using multiple deliveries
1005 JJ/01 installed exipick 20100104.1, adding $max_received_linelength,
1006 $data_path, and $header_path variables; fixed documentation bugs and
1009 JJ/02 installed exipick 20100222.0, added --input-dir and --finput to allow
1010 exipick to access non-standard spools, including the "frozen" queue
1013 NM/01 Bugzilla 965: Support mysql stored procedures.
1014 Patch from Alain Williams
1016 NM/02 Bugzilla 961: Spacing fix (syntax error) on Makefile directives for NetBSD
1018 NM/03 Bugzilla 955: Documentation fix for max_rcpts.
1019 Patch from Andreas Metzler
1021 NM/04 Bugzilla 954: Fix for unknown responses from Dovecot authenticator.
1022 Patch from Kirill Miazine
1024 NM/05 Bugzilla 671: Added umask to procmail example.
1026 JJ/03 installed exipick 20100323.0, fixing doc bug
1028 NM/06 Bugzilla 988: CVE-2010-2023 - prevent hardlink attack on sticky mail
1029 directory. Notification and patch from Dan Rosenberg.
1031 TK/01 PDKIM: Upgrade PolarSSL files to upstream version 0.12.1.
1033 TK/02 Improve log output when DKIM signing operation fails.
1035 MH/01 Treat the transport option dkim_domain as a colon separated
1036 list, not as a single string, and sign the message with each element,
1037 omitting multiple occurences of the same signer.
1039 NM/07 Null terminate DKIM strings, Null initialise DKIM variable
1040 Bugzilla 985, 986. Patch by Simon Arlott
1042 NM/08 Bugzilla 967. dnsdb DNS TXT record bug fix (DKIM-related)
1043 Patch by Simon Arlott
1045 PP/01 Bugzilla 989: CVE-2010-2024 - work round race condition on
1046 MBX locking. Notification from Dan Rosenberg.
1052 TK/01 Bugzilla 912: Fix DKIM segfault on empty headers/body.
1054 NM/01 Bugzilla 913: Documentation fix for gnutls_* options.
1056 NM/02 Bugzilla 722: Documentation for randint. Better randomness defaults.
1058 NM/03 Bugzilla 847: Enable DNSDB lookup by default.
1060 NM/04 Bugzilla 915: Flag broken perl installation during build.
1066 TK/01 Added patch by Johannes Berg that expands the main option
1067 "spamd_address" if it starts with a dollar sign.
1069 TK/02 Write list of recipients to X-Envelope-Sender header when building
1070 the mbox-format spool file for content scanning (suggested by Jakob
1073 TK/03 Added patch by Wolfgang Breyha that adds experimental DCC
1074 (http://www.dcc-servers.net/) support via dccifd. Activated by
1075 setting EXPERIMENTAL_DCC=yes in Local/Makefile.
1077 TK/04 Bugzilla 673: Add f-protd malware scanner support. Patch submitted
1078 by Mark Daniel Reidel <mr@df.eu>.
1080 NM/01 Bugzilla 657: Embedded PCRE removed from the exim source tree.
1081 When building exim an external PCRE library is now needed -
1082 PCRE is a system library on the majority of modern systems.
1083 See entry on PCRE_LIBS in EDITME file.
1085 NM/02 Bugzilla 646: Removed unwanted C/R in Dovecot authenticator
1086 conversation. Added nologin parameter to request.
1087 Patch contributed by Kirill Miazine.
1089 TF/01 Do not log submission mode rewrites if they do not change the address.
1091 TF/02 Bugzilla 662: Fix stack corruption before exec() in daemon.c.
1093 NM/03 Bugzilla 602: exicyclog now handles panic log, and creates empty
1094 log files in place. Contributed by Roberto Lima.
1096 NM/04 Bugzilla 667: Close socket used by dovecot authenticator.
1098 TF/03 Bugzilla 615: When checking the local_parts router precondition
1099 after a local_part_suffix or local_part_prefix option, Exim now
1100 does not use the address's named list lookup cache, since this
1101 contains cached lookups for the whole local part.
1103 NM/05 Bugzilla 521: Integrated SPF Best Guess support contributed by
1104 Robert Millan. Documentation is in experimental-spec.txt.
1106 TF/04 Bugzilla 668: Fix parallel build (make -j).
1108 NM/05.2 Bugzilla 437: Prevent Maildir aux files being created with mode 000.
1110 NM/05.3 Bugzilla 598: Improvement to Dovecot authenticator handling.
1111 Patch provided by Jan Srzednicki.
1113 TF/05 Leading white space used to be stripped from $spam_report which
1114 wrecked the formatting. Now it is preserved.
1116 TF/06 Save $spam_score, $spam_bar, and $spam_report in spool files, so
1117 that they are available at delivery time.
1119 TF/07 Fix the way ${extract is skipped in the untaken branch of a conditional.
1121 TF/08 TLS error reporting now respects the incoming_interface and
1122 incoming_port log selectors.
1124 TF/09 Produce a more useful error message if an SMTP transport's hosts
1125 setting expands to an empty string.
1127 NM/06 Bugzilla 744: EXPN did not work under TLS.
1128 Patch provided by Phil Pennock.
1130 NM/07 Bugzilla 769: Extraneous comma in usage fprintf
1131 Patch provided by Richard Godbee.
1133 NM/08 Fixed erroneous documentation references to smtp_notquit_acl to be
1134 acl_smtp_notquit, added index entry.
1136 NM/09 Bugzilla 787: Potential buffer overflow in string_format.
1137 Patch provided by Eugene Bujak.
1139 NM/10 Bugzilla 770: Problem on some platforms modifying the len parameter to
1140 accept(). Patch provided by Maxim Dounin.
1142 NM/11 Bugzilla 749: Preserve old behaviour of blanks comparing equal to zero.
1143 Patch provided by Phil Pennock.
1145 NM/12 Bugzilla 497: Correct behaviour of exiwhat when no config exists.
1147 NM/13 Bugzilla 590: Correct handling of Resent-Date headers.
1148 Patch provided by Brad "anomie" Jorsch.
1150 NM/14 Bugzilla 622: Added timeout setting to transport filter.
1151 Patch provided by Dean Brooks.
1153 TK/05 Add native DKIM support (does not depend on external libraries).
1155 NM/15 Bugzilla 854: Removed code that symlinks to pcre as its no longer useful.
1156 Patch provided by Graeme Fowler.
1158 NM/16 Bugzilla 851: Documentation example syntax fix.
1160 NM/17 Changed NOTICE file to remove references to embedded PCRE.
1162 NM/18 Bugzilla 894: Fix issue with very long lines including comments in
1165 NM/19 Bugzilla 745: TLS version reporting.
1166 Patch provided by Phil Pennock.
1168 NM/20 Bugzilla 167: bool: condition support.
1169 Patch provided by Phil Pennock.
1171 NM/21 Bugzilla 665: gnutls_compat_mode to allow compatibility with broken
1172 clients. Patch provided by Phil Pennock.
1174 NM/22 Bugzilla 607: prepend (not append) Resent-Message-ID and Resent-Date.
1175 Patch provided by Brad "anomie" Jorsch.
1177 NM/23 Bugzilla 687: Fix misparses in eximstats.
1178 Patch provided by Heiko Schlittermann.
1180 NM/24 Bugzilla 688: Fix exiwhat to handle log_selector = +pid.
1181 Patch provided by Heiko Schlittermann.
1183 NM/25 Bugzilla 727: Use transport mode as default mode for maildirsize file.
1184 plus update to original patch.
1186 NM/26 Bugzilla 799: Documentation correction for ratelimit.
1188 NM/27 Bugzilla 802: Improvements to local interface IP addr detection.
1189 Patch provided by David Brownlee.
1191 NM/28 Bugzilla 807: Improvements to LMTP delivery logging.
1193 NM/29 Bugzilla 862, 866, 875: Documentation bugfixes.
1195 NM/30 Bugzilla 888: TLS documentation bugfixes.
1197 NM/31 Bugzilla 896: Dovecot buffer overrun fix.
1199 NM/32 Bugzilla 889: Change all instances of "expr" in shell scripts to "expr --"
1200 Unlike the original bugzilla I have changed all shell scripts in src tree.
1202 NM/33 Bugzilla 898: Transport filter timeout fix.
1203 Patch by Todd Rinaldo.
1205 NM/34 Bugzilla 901: Fix sign/unsigned and UTF mismatches.
1206 Patch by Serge Demonchaux.
1208 NM/35 Bugzilla 39: Base64 decode bug fixes.
1209 Patch by Jakob Hirsch.
1211 NM/36 Bugzilla 909: Correct connect() call in dcc code.
1213 NM/37 Bugzilla 910: Correct issue with relaxed/simple handling.
1215 NM/38 Bugzilla 908: Removed NetBSD3 support as no longer needed.
1217 NM/39 Bugzilla 911: Fixed MakeLinks build script.
1223 TK/01 Add preliminary DKIM support. Currently requires a forked version of
1224 ALT-N's libdkim that I have put here:
1225 http://duncanthrax.net/exim-experimental/
1227 Note to Michael Haardt: I had to rename some vars in sieve.c. They
1228 were called 'true' and it seems that C99 defines that as a reserved
1229 keyword to be used with 'bool' variable types. That means you could
1230 not include C99-style headers which use bools without triggering
1231 build errors in sieve.c.
1233 NM/01 Bugzilla 592: --help option is handled incorrectly if exim is invoked
1234 as mailq or other aliases. Changed the --help handling significantly
1235 to do whats expected. exim_usage() emits usage/help information.
1237 SC/01 Added the -bylocaldomain option to eximstats.
1239 NM/02 Bugzilla 619: Defended against bad data coming back from gethostbyaddr.
1241 NM/03 Bugzilla 613: Documentation fix for acl_not_smtp.
1243 NM/04 Bugzilla 628: PCRE update to 7.4 (work done by John Hall).
1249 PH/01 Another patch from the Sieve maintainer.
1251 PH/02 When an IPv6 address is converted to a string for single-key lookup
1252 in an address list (e.g. for an item such as "net24-dbm;/net/works"),
1253 dots are used instead of colons so that keys in lsearch files need not
1254 contain colons. This was done some time before quoting was made available
1255 in lsearch files. However, iplsearch files do require colons in IPv6 keys
1256 (notated using the quote facility) so as to distinguish them from IPv4
1257 keys. This meant that lookups for IP addresses in host lists did not work
1258 for iplsearch lookups.
1260 This has been fixed by arranging for IPv6 addresses to be expressed with
1261 colons if the lookup type is iplsearch. This is not incompatible, because
1262 previously such lookups could never work.
1264 The situation is now rather anomolous, since one *can* have colons in
1265 ordinary lsearch keys. However, making the change in all cases is
1266 incompatible and would probably break a number of configurations.
1268 TK/01 Change PRVS address formatting scheme to reflect latests BATV draft
1271 MH/01 The "spam" ACL condition code contained a sscanf() call with a %s
1272 conversion specification without a maximum field width, thereby enabling
1273 a rogue spamd server to cause a buffer overflow. While nobody in their
1274 right mind would setup Exim to query an untrusted spamd server, an
1275 attacker that gains access to a server running spamd could potentially
1276 exploit this vulnerability to run arbitrary code as the Exim user.
1278 TK/02 Bugzilla 502: Apply patch to make the SPF-Received: header use
1279 $primary_hostname instead of what libspf2 thinks the hosts name is.
1281 MH/02 The dsearch lookup now uses lstat(2) instead of stat(2) to look for
1282 a directory entry by the name of the lookup key. Previously, if a
1283 symlink pointed to a non-existing file or a file in a directory that
1284 Exim lacked permissions to read, a lookup for a key matching that
1285 symlink would fail. Now it is enough that a matching directory entry
1286 exists, symlink or not. (Bugzilla 503.)
1288 PH/03 The body_linecount and body_zerocount variables are now exported in the
1291 PH/04 Added the $dnslist_matched variable.
1293 PH/05 Unset $tls_cipher and $tls_peerdn before making a connection as a client.
1294 This means they are set thereafter only if the connection becomes
1297 PH/06 Added the client_condition to authenticators so that some can be skipped
1298 by clients under certain conditions.
1300 PH/07 The error message for a badly-placed control=no_multiline_responses left
1301 "_responses" off the end of the name.
1303 PH/08 Added -Mvc to output a copy of a message in RFC 2822 format.
1305 PH/09 Tidied the code for creating ratelimiting keys, creating them explicitly
1306 (without spaces) instead of just copying the configuration text.
1308 PH/10 Added the /noupdate option to the ratelimit ACL condition.
1310 PH/11 Added $max_received_linelength.
1312 PH/12 Added +ignore_defer and +include_defer to host lists.
1314 PH/13 Installed PCRE version 7.2. This needed some changes because of the new
1315 way in which PCRE > 7.0 is built.
1317 PH/14 Implemented queue_only_load_latch.
1319 PH/15 Removed an incorrect (int) cast when reading the value of SIZE in a
1320 MAIL command. The effect was to mangle the value on 64-bit systems.
1322 PH/16 Another patch from the Sieve maintainer.
1324 PH/17 Added the NOTQUIT ACL, based on a patch from Ted Cooper.
1326 PH/18 If a system quota error occurred while trying to create the file for
1327 a maildir delivery, the message "Mailbox is full" was not appended to the
1328 bounce if the delivery eventually timed out. Change 4.67/27 below applied
1329 only to a quota excession during the actual writing of the file.
1331 PH/19 It seems that peer DN values may contain newlines (and other non-printing
1332 characters?) which causes problems in log lines. The DN values are now
1333 passed through string_printing() before being added to log lines.
1335 PH/20 Added the "servers=" facility to MySQL and PostgreSQL lookups. (Oracle
1336 and InterBase are left for another time.)
1338 PH/21 Added message_body_newlines option.
1340 PH/22 Guard against possible overflow in moan_check_errorcopy().
1342 PH/23 POSIX allows open() to be a macro; guard against that.
1344 PH/24 If the recipient of an error message contained an @ in the local part
1345 (suitably quoted, of course), incorrect values were put in $domain and
1346 $local_part during the evaluation of errors_copy.
1352 MH/01 Fix for bug #448, segfault in Dovecot authenticator when interface_address
1353 is unset (happens when testing with -bh and -oMi isn't used). Thanks to
1356 PH/01 Added a new log selector smtp_no_mail, to log SMTP sessions that do not
1357 issue a MAIL command.
1359 PH/02 In an ACL statement such as
1361 deny dnslists = X!=127.0.0.2 : X=127.0.0.2
1363 if a client was not listed at all, or was listed with a value other than
1364 127.0.0.2, in the X list, but was listed with 127.0.0.2 in the Y list,
1365 the condition was not true (as it should be), so access was not denied.
1366 The bug was that the ! inversion was incorrectly passed on to the second
1367 item. This has been fixed.
1369 PH/03 Added additional dnslists conditions == and =& which are different from
1370 = and & when the dns lookup returns more than one IP address.
1372 PH/04 Added gnutls_require_{kx,mac,protocols} to give more control over the
1373 cipher suites used by GnuTLS. These options are ignored by OpenSSL.
1375 PH/05 After discussion on the list, added a compile time option ENABLE_DISABLE_
1376 FSYNC, which compiles an option called disable_fsync that allows for
1377 bypassing fsync(). The documentation is heavily laced with warnings.
1379 SC/01 Updated eximstats to collate all SpamAssassin rejects into one bucket.
1381 PH/06 Some tidies to the infrastructure of the Test Suite that is concerned
1382 with the auxiliary C programs that it uses: (1) Arrange for BIND_8_COMPAT
1383 to be defined when compiling on OSX (Darwin); (2) Tidies to the Makefile,
1384 including adding "make clean"; (3) Added -fPIC when compiling the test
1385 dynamically loaded module, to get rid of a warning.
1387 MH/02 Fix for bug #451, causing paniclog entries to be written if a bounce
1388 message fails, move_frozen_messages = true and ignore_bounce_errors_after
1389 = 0s. The bug is otherwise harmless.
1391 PH/07 There was a bug in the dovecot authenticator such that the value of
1392 $auth1 could be overwritten, and so not correctly preserved, after a
1393 successful authentication. This usually meant that the value preserved by
1394 the server_setid option was incorrect.
1396 PH/08 Added $smtp_count_at_connection_start, deliberately with a long name.
1398 PH/09 Installed PCRE release 7.0.
1400 PH/10 The acl_not_smtp_start ACL was, contrary to the documentation, not being
1401 run for batched SMTP input. It is now run at the start of every message
1402 in the batch. While fixing this I discovered that the process information
1403 (output by running exiwhat) was not always getting set for -bs and -bS
1404 input. This is fixed, and it now also says "batched" for BSMTP.
1406 PH/11 Added control=no_pipelining.
1408 PH/12 Added $sending_ip_address and $sending_port (mostly Magnus Holmgren's
1409 patch, slightly modified), and move the expansion of helo_data till after
1410 the connection is made in the smtp transport (so it can use these
1413 PH/13 Added ${rfc2047d: to decoded RFC 2047 strings.
1415 PH/14 Added log_selector = +pid.
1417 PH/15 Flush SMTP output before delaying, unless control=no_delay_flush is set.
1419 PH/16 Add ${if forany and ${if forall.
1421 PH/17 Added dsn_from option to vary the From: line in DSNs.
1423 PH/18 Flush SMTP output before performing a callout, unless control =
1424 no_callout_flush is set.
1426 PH/19 Change 4.64/PH/36 introduced a bug: when address_retry_include_sender
1427 was true (the default) a successful delivery failed to delete the retry
1428 item, thus causing premature timeout of the address. The bug is now
1431 PH/20 Added hosts_avoid_pipelining to the smtp transport.
1433 PH/21 Long custom messages for fakedefer and fakereject are now split up
1434 into multiline reponses in the same way that messages for "deny" and
1435 other ACL rejections are.
1437 PH/22 Applied Jori Hamalainen's speed-up changes and typo fixes to exigrep,
1438 with slight modification.
1440 PH/23 Applied sieve patches from the maintainer "tracking the latest notify
1441 draft, changing the syntax and factoring some duplicate code".
1443 PH/24 When the log selector "outgoing_port" was set, the port was shown as -1
1444 for deliveries of the second and subsequent messages over the same SMTP
1447 PH/25 Applied Magnus Holmgren's patch for ${addresses, ${map, ${filter, and
1448 ${reduce, with only minor "tidies".
1450 SC/02 Applied Daniel Tiefnig's patch to improve the '($parent) =' pattern match.
1452 PH/26 Added a "continue" ACL modifier that does nothing, for the benefit of its
1453 expansion side effects.
1455 PH/27 When a message times out after an over-quota error from an Exim-imposed
1456 quota, the bounce message says "mailbox is full". This message was not
1457 being given when it was a system quota that was exceeded. It now should
1460 MH/03 Made $recipients available in local_scan(). local_scan() already has
1461 better access to the recipient list through recipients_list[], but
1462 $recipients can be useful in postmaster-provided expansion strings.
1464 PH/28 The $smtp_command and $smtp_command_argument variables were not correct
1465 in the case of a MAIL command with additional options following the
1466 address, for example: MAIL FROM:<foo@bar> SIZE=1234. The option settings
1467 were accidentally chopped off.
1469 PH/29 SMTP synchronization checks are implemented when a command is read -
1470 there is a check that no more input is waiting when there shouldn't be
1471 any. However, for some commands, a delay in an ACL can mean that it is
1472 some time before the response is written. In this time, more input might
1473 arrive, invalidly. So now there are extra checks after an ACL has run for
1474 HELO/EHLO and after the predata ACL, and likewise for MAIL and RCPT when
1475 pipelining has not been advertised.
1477 PH/30 MH's patch to allow iscntrl() characters to be list separators.
1479 PH/31 Unlike :fail:, a custom message specified with :defer: was not being
1480 returned in the SMTP response when smtp_return_error_details was false.
1481 This has been fixed.
1483 PH/32 Change the Dovecot authenticator to use read() and write() on the socket
1484 instead of the C I/O that was originally supplied, because problems were
1485 reported on Solaris.
1487 PH/33 Compile failed with OpenSSL 0.9.8e. This was due to a coding error in
1488 Exim which did not show up earlier: it was assuming that a call to
1489 SSL_CTX_set_info_callback() might give an error value. In fact, there is
1490 no error. In previous releases of OpenSSL, SSL_CTX_set_info_callback()
1491 was a macro that became an assignment, so it seemed to work. This has
1492 changed to a proper function call with a void return, hence the compile
1493 error. Exim's code has been fixed.
1495 PH/34 Change HDA_SIZE in oracle.c from 256 to 512. This is needed for 64-bit
1498 PH/35 Applied a patch from the Sieve maintainer which fixes a bug in "notify".
1500 PH/36 Applied John Jetmore's patch to add -v functionality to exigrep.
1502 PH/37 If a message is not accepted after it has had an id assigned (e.g.
1503 because it turns out to be too big or there is a timeout) there is no
1504 "Completed" line in the log. When some messages of this type were
1505 selected by exigrep, they were listed as "not completed". Others were
1506 picked up by some special patterns. I have improved the selection
1507 criteria to be more general.
1509 PH/38 The host_find_failed option in the manualroute router can now be set
1510 to "ignore", to completely ignore a host whose IP address cannot be
1511 found. If all hosts are ignored, the behaviour is controlled by the new
1512 host_all_ignored option.
1514 PH/39 In a list of hosts for manualroute, if one item (either because of multi-
1515 homing or because of multiple MX records with /mx) generated more than
1516 one IP address, and the following item turned out to be the local host,
1517 all the secondary addresses of the first item were incorrectly removed
1518 from the list, along with the local host and any following hosts (which
1519 is what is supposed to happen).
1521 PH/40 When Exim receives a message, it writes the login name, uid, and gid of
1522 whoever called Exim into the -H file. In the case of the daemon it was
1523 behaving confusingly. When first started, it used values for whoever
1524 started the daemon, but after a SIGHUP it used the Exim user (because it
1525 calls itself on a restart). I have changed the code so that it now always
1528 PH/41 (Following a suggestion from Tony Finch) If all the RCPT commands in a
1529 message are rejected with the same error (e.g. no authentication or bad
1530 sender address), and a DATA command is nevertheless sent (as can happen
1531 with PIPELINING or a stupid MUA), the error message that was given to the
1532 RCPT commands is included in the rejection of the DATA command. This is
1533 intended to be helpful for MUAs that show only the final error to their
1536 PH/42 Another patch from the Sieve maintainer.
1538 SC/02 Eximstats - Differentiate between permanent and temporary rejects.
1539 Eximstats - Fixed some broken HTML links and added missing column headers
1541 Eximstats - Fixed Grand Total Summary Domains, Edomains, and Email
1542 columns for Rejects, Temp Rejects, Ham, and Spam rows.
1544 SC/03 Eximstats - V1.58 Fix to get <> and blackhole to show in edomain tables.
1546 PH/43 Yet another patch from the Sieve maintainer.
1548 PH/44 I found a way to check for a TCP/IP connection going away before sending
1549 the response to the final '.' that terminates a message, but only in the
1550 case where the client has not sent further data following the '.'
1551 (unfortunately, this is allowed). However, in many cases there won't be
1552 any further data because there won't be any more messages to send. A call
1553 to select() can be used: if it shows that the input is "ready", there is
1554 either input waiting, or the socket has been closed. An attempt to read
1555 the next input character can distinguish the two cases. Previously, Exim
1556 would have sent an OK response which the client would never have see.
1557 This could lead to message repetition. This fix should cure that, at
1558 least in a lot of common cases.
1560 PH/45 Do not advertise STARTTLS in response to HELP unless it would be
1561 advertised in response to EHLO.
1567 PH/01 Two more bugs that were introduced by 4.64/PH/07, in addition to the one
1568 fixed by 4.65/MH/01 (is this a record?) are fixed:
1570 (i) An empty string was always treated as zero by the numeric comparison
1571 operators. This behaviour has been restored.
1573 (ii) It is documented that the numeric comparison operators always treat
1574 their arguments as decimal numbers. This was broken in that numbers
1575 starting with 0 were being interpreted as octal.
1577 While fixing these problems I realized that there was another issue that
1578 hadn't been noticed. Values of message_size_limit (both the global option
1579 and the transport option) were treated as octal if they started with 0.
1580 The documentation was vague. These values are now always treated as
1581 decimal, and I will make that clear in the documentation.
1587 TK/01 Disable default definition of HAVE_LINUX_SENDFILE. Clashes with
1588 Linux large file support (_FILE_OFFSET_BITS=64) on older glibc
1591 MH/01 Don't check that the operands of numeric comparison operators are
1592 integers when their expansion is in "skipping" mode (fixes bug
1593 introduced by 4.64-PH/07).
1595 PH/01 If a system filter or a router generates more than SHRT_MAX (32767)
1596 child addresses, Exim now panics and dies. Previously, because the count
1597 is held in a short int, deliveries were likely to be lost. As such a
1598 large number of recipients for a single message is ridiculous
1599 (performance will be very, very poor), I have chosen to impose a limit
1600 rather than extend the field.
1606 TK/01 Bugzilla #401. Fix DK spooling code so that it can overwrite a
1607 leftover -K file (the existence of which was triggered by #402).
1608 While we were at it, introduced process PID as part of the -K
1609 filename. This should rule out race conditions when creating
1612 TK/02 Bugzilla #402. Apply patch from Simon Arlott, speeding up DK signing
1613 processing considerably. Previous code took too long for large mails,
1614 triggering a timeout which in turn triggers #401.
1616 TK/03 Introduced HAVE_LINUX_SENDFILE to os.h-Linux. Currently only used
1617 in the DK code in transports.c. sendfile() is not really portable,
1618 hence the _LINUX specificness.
1620 TF/01 In the add_headers option to the mail command in an Exim filter,
1621 there was a bug that Exim would claim a syntax error in any
1622 header after the first one which had an odd number of characters
1625 PH/01 If a server that rejects MAIL FROM:<> was the target of a sender
1626 callout verification, Exim cached a "reject" for the entire domain. This
1627 is correct for most verifications, but it is not correct for a recipient
1628 verification with use_sender or use_postmaster set, because in that case
1629 the callout does not use MAIL FROM:<>. Exim now distinguishes the special
1630 case of MAIL FROM:<> rejection from other early rejections (e.g.
1631 rejection of HELO). When verifying a recipient using a non-null MAIL
1632 address, the cache is ignored if it shows MAIL FROM:<> rejection.
1633 Whatever the result of the callout, the value of the domain cache is
1634 left unchanged (for any other kind of callout, getting as far as trying
1635 RCPT means that the domain itself is ok).
1637 PH/02 Tidied a number of unused variable and signed/unsigned warnings that
1640 PH/03 On Solaris, an unexpectedly close socket (dropped connection) can
1641 manifest itself as EPIPE rather than ECONNECT. When tidying away a
1642 session, the daemon ignores ECONNECT errors and logs others; it now
1643 ignores EPIPE as well.
1645 PH/04 Applied Nico Erfurth's refactoring patch to tidy up mime.c
1646 (quoted-printable decoding).
1648 PH/05 Applied Nico Erfurth's refactoring patch to tidy up spool_mbox.c, and
1649 later the small subsequent patch to fix an introduced bug.
1651 PH/06 Installed the latest Cygwin Makefile from the Cygwin maintainer.
1653 PH/07 There was no check for overflow in expansions such as ${if >{1}{4096M}}.
1655 PH/08 An error is now given if message_size_limit is specified negative.
1657 PH/09 Applied and tidied up Jakob Hirsch's patch for allowing ACL variables
1658 to be given (somewhat) arbitrary names.
1660 JJ/01 exipick 20060919.0, allow for arbitrary acl_ variables introduced
1663 JJ/02 exipick 20060919.0, --show-vars args can now be regular expressions,
1664 miscellaneous code fixes
1666 PH/10 Added the log_reject_target ACL modifier to specify where to log
1669 PH/11 Callouts were setting the name used for EHLO/HELO from $smtp_active_
1670 hostname. This is wrong, because it relates to the incoming message (and
1671 probably the interface on which it is arriving) and not to the outgoing
1672 callout (which could be using a different interface). This has been
1673 changed to use the value of the helo_data option from the smtp transport
1674 instead - this is what is used when a message is actually being sent. If
1675 there is no remote transport (possible with a router that sets up host
1676 addresses), $smtp_active_hostname is used.
1678 PH/12 Installed Andrey Panin's patch to add a dovecot authenticator. Various
1679 tweaks were necessary in order to get it to work (see also 21 below):
1680 (a) The code assumed that strncpy() returns a negative number on buffer
1681 overflow, which isn't the case. Replaced with Exim's string_format()
1683 (b) There were several signed/unsigned issues. I just did the minimum
1684 hacking in of casts. There is scope for a larger refactoring.
1685 (c) The code used strcasecmp() which is not a standard C function.
1686 Replaced with Exim's strcmpic() function.
1687 (d) The code set only $1; it now sets $auth1 as well.
1688 (e) A simple test gave the error "authentication client didn't specify
1689 service in request". It would seem that Dovecot has changed its
1690 interface. Fortunately there's a specification; I followed it and
1691 changed what the client sends and it appears to be working now.
1693 PH/13 Added $message_headers_raw to provide the headers without RFC 2047
1696 PH/14 Corrected misleading output from -bv when -v was also used. Suppose the
1697 address A is aliased to B and C, where B exists and C does not. Without
1698 -v the output is "A verified" because verification stops after a
1699 successful redirection if more than one address is generated. However,
1700 with -v the child addresses are also verified. Exim was outputting "A
1701 failed to verify" and then showing the successful verification for C,
1702 with its parentage. It now outputs "B failed to verify", showing B's
1703 parentage before showing the successful verification of C.
1705 PH/15 Applied Michael Deutschmann's patch to allow DNS black list processing to
1706 look up a TXT record in a specific list after matching in a combined
1709 PH/16 It seems that the options setting for the resolver (RES_DEFNAMES and
1710 RES_DNSRCH) can affect the behaviour of gethostbyname() and friends when
1711 they consult the DNS. I had assumed they would set it the way they
1712 wanted; and indeed my experiments on Linux seem to show that in some
1713 cases they do (I could influence IPv6 lookups but not IPv4 lookups).
1714 To be on the safe side, however, I have now made the interface to
1715 host_find_byname() similar to host_find_bydns(), with an argument
1716 containing the DNS resolver options. The host_find_byname() function now
1717 sets these options at its start, just as host_find_bydns() does. The smtp
1718 transport options dns_qualify_single and dns_search_parents are passed to
1719 host_find_byname() when gethostbyname=TRUE in this transport. Other uses
1720 of host_find_byname() use the default settings of RES_DEFNAMES
1721 (qualify_single) but not RES_DNSRCH (search_parents).
1723 PH/17 Applied (a modified version of) Nico Erfurth's patch to make
1724 spool_read_header() do less string testing, by means of a preliminary
1725 switch on the second character of optional "-foo" lines. (This is
1726 overdue, caused by the large number of possibilities that now exist.
1727 Originally there were few.) While I was there, I also converted the
1728 str(n)cmp tests so they don't re-test the leading "-" and the first
1729 character, in the hope this might squeeze out yet more improvement.
1731 PH/18 Two problems with "group" syntax in header lines when verifying: (1) The
1732 flag allowing group syntax was set by the header_syntax check but not
1733 turned off, possible causing trouble later; (2) The flag was not being
1734 set at all for the header_verify test, causing "group"-style headers to
1735 be rejected. I have now set it in this case, and also caused header_
1736 verify to ignore an empty address taken from a group. While doing this, I
1737 came across some other cases where the code for allowing group syntax
1738 while scanning a header line wasn't quite right (mostly, not resetting
1739 the flag correctly in the right place). These bugs could have caused
1740 trouble for malformed header lines. I hope it is now all correct.
1742 PH/19 The functions {pwcheck,saslauthd}_verify_password() are always called
1743 with the "reply" argument non-NULL. The code, however (which originally
1744 came from elsewhere) had *some* tests for NULL when it wrote to *reply,
1745 but it didn't always do it. This confused somebody who was copying the
1746 code for some other use. I have removed all the tests.
1748 PH/20 It was discovered that the GnuTLS code had support for RSA_EXPORT, a
1749 feature that was used to support insecure browsers during the U.S. crypto
1750 embargo. It requires special client support, and Exim is probably the
1751 only MTA that supported it -- and would never use it because real RSA is
1752 always available. This code has been removed, because it had the bad
1753 effect of slowing Exim down by computing (never used) parameters for the
1754 RSA_EXPORT functionality.
1756 PH/21 On the advice of Timo Sirainen, added a check to the dovecot
1757 authenticator to fail if there's a tab character in the incoming data
1758 (there should never be unless someone is messing about, as it's supposed
1759 to be base64-encoded). Also added, on Timo's advice, the "secured" option
1760 if the connection is using TLS or if the remote IP is the same as the
1761 local IP, and the "valid-client-cert option" if a client certificate has
1764 PH/22 As suggested by Dennis Davis, added a server_condition option to *all*
1765 authenticators. This can be used for authorization after authentication
1766 succeeds. (In the case of plaintext, it servers for both authentication
1769 PH/23 Testing for tls_required and lost_connection in a retry rule didn't work
1770 if any retry times were supplied.
1772 PH/24 Exim crashed if verify=helo was activated during an incoming -bs
1773 connection, where there is no client IP address to check. In this
1774 situation, the verify now always succeeds.
1776 PH/25 Applied John Jetmore's -Mset patch.
1778 PH/26 Added -bem to be like -Mset, but loading a message from a file.
1780 PH/27 In a string expansion for a processed (not raw) header when multiple
1781 headers of the same name were present, leading whitespace was being
1782 removed from all of them, but trailing whitespace was being removed only
1783 from the last one. Now trailing whitespace is removed from each header
1784 before concatenation. Completely empty headers in a concatenation (as
1785 before) are ignored.
1787 PH/28 Fixed bug in backwards-compatibility feature of PH/09 (thanks to John
1788 Jetmore). It would have mis-read ACL variables from pre-4.61 spool files.
1790 PH/29 [Removed. This was a change that I later backed out, and forgot to
1791 correct the ChangeLog entry (that I had efficiently created) before
1792 committing the later change.]
1794 PH/30 Exim was sometimes attempting to deliver messages that had suffered
1795 address errors (4xx response to RCPT) over the same connection as other
1796 messages routed to the same hosts. Such deliveries are always "forced",
1797 so retry times are not inspected. This resulted in far too many retries
1798 for the affected addresses. The effect occurred only when there were more
1799 hosts than the hosts_max_try setting in the smtp transport when it had
1800 the 4xx errors. Those hosts that it had tried were not added to the list
1801 of hosts for which the message was waiting, so if all were tried, there
1802 was no problem. Two fixes have been applied:
1804 (i) If there are any address or message errors in an SMTP delivery, none
1805 of the hosts (tried or untried) are now added to the list of hosts
1806 for which the message is waiting, so the message should not be a
1807 candidate for sending over the same connection that was used for a
1808 successful delivery of some other message. This seems entirely
1809 reasonable: after all the message is NOT "waiting for some host".
1810 This is so "obvious" that I'm not sure why it wasn't done
1811 previously. Hope I haven't missed anything, but it can't do any
1812 harm, as the worst effect is to miss an optimization.
1814 (ii) If, despite (i), such a delivery is accidentally attempted, the
1815 routing retry time is respected, so at least it doesn't keep
1816 hammering the server.
1818 PH/31 Installed Andrew Findlay's patch to close the writing end of the socket
1819 in ${readsocket because some servers need this prod.
1821 PH/32 Added some extra debug output when updating a wait-xxx database.
1823 PH/33 The hint "could be header name not terminated by colon", which has been
1824 given for certain expansion errors for a long time, was not being given
1825 for the ${if def:h_colon_omitted{... case.
1827 PH/34 The spec says: "With one important exception, whenever a domain list is
1828 being scanned, $domain contains the subject domain." There was at least
1829 one case where this was not true.
1831 PH/35 The error "getsockname() failed: connection reset by peer" was being
1832 written to the panic log as well as the main log, but it isn't really
1833 panic-worthy as it just means the connection died rather early on. I have
1834 removed the panic log writing for the ECONNRESET error when getsockname()
1837 PH/36 After a 4xx response to a RCPT error, that address was delayed (in queue
1838 runs only) independently of the message's sender address. This meant
1839 that, if the 4xx error was in fact related to the sender, a different
1840 message to the same recipient with a different sender could confuse
1841 things. In particualar, this can happen when sending to a greylisting
1842 server, but other circumstances could also provoke similar problems.
1843 I have changed the default so that the retry time for these errors is now
1844 based a combination of the sender and recipient addresses. This change
1845 can be overridden by setting address_retry_include_sender=false in the
1848 PH/37 For LMTP over TCP/IP (the smtp transport), error responses from the
1849 remote server are returned as part of bounce messages. This was not
1850 happening for LMTP over a pipe (the lmtp transport), but now it is the
1851 same for both kinds of LMTP.
1853 PH/38 Despite being documented as not happening, Exim was rewriting addresses
1854 in header lines that were in fact CNAMEs. This is no longer the case.
1856 PH/39 If -R or -S was given with -q<time>, the effect of -R or -S was ignored,
1857 and queue runs started by the daemon processed all messages. This has
1858 been fixed so that -R and -S can now usefully be given with -q<time>.
1860 PH/40 Import PCRE release 6.7 (fixes some bugs).
1862 PH/41 Add bitwise logical operations to eval (courtesy Brad Jorsch).
1864 PH/42 Give an error if -q is specified more than once.
1866 PH/43 Renamed the variables $interface_address and $interface_port as
1867 $received_ip_address and $received_port, to make it clear that these
1868 values apply to message reception, and not to the outgoing interface when
1869 a message is delivered. (The old names remain recognized, of course.)
1871 PH/44 There was no timeout on the connect() call when using a Unix domain
1872 socket in the ${readsocket expansion. There now is.
1874 PH/45 Applied a modified version of Brad Jorsch's patch to allow "message" to
1875 be meaningful with "accept".
1877 SC/01 Eximstats V1.43
1878 Bug fix for V1.42 with -h0 specified. Spotted by Chris Lear.
1880 SC/02 Eximstats V1.44
1881 Use a glob alias rather than an array ref in the generated
1882 parser. This improves both readability and performance.
1884 SC/03 Eximstats V1.45 (Marco Gaiarin / Steve Campbell)
1885 Collect SpamAssassin and rejection statistics.
1886 Don't display local sender or destination tables unless
1887 there is data to show.
1888 Added average volumes into the top table text output.
1890 SC/04 Eximstats V1.46
1891 Collect data on the number of addresses (recipients)
1892 as well as the number of messages.
1894 SC/05 Eximstats V1.47
1895 Added 'Message too big' to the list of mail rejection
1896 reasons (thanks to Marco Gaiarin).
1898 SC/06 Eximstats V1.48
1899 Mainlog lines which have GMT offsets and are too short to
1900 have a flag are now skipped.
1902 SC/07 Eximstats V1.49 (Alain Williams)
1903 Added the -emptyok flag.
1905 SC/08 Eximstats V1.50
1906 Fixes for obtaining the IP address from reject messages.
1908 JJ/03 exipick.20061117.2, made header handling as similar to exim as possible
1909 (added [br]h_ prefixes, implemented RFC2047 decoding. Fixed
1910 whitesspace changes from 4.64-PH/27
1912 JJ/04 exipick.20061117.2, fixed format and added $message_headers_raw to
1915 JJ/05 exipick.20061117.2, bug fixes (error out sooner when invalid criteria
1916 are found, allow negative numbers in numeric criteria)
1918 JJ/06 exipick.20061117.2, added new $message_body_missing variable
1920 JJ/07 exipick.20061117.2, added $received_ip_address and $received_port
1921 to match changes made in 4.64-PH/43
1923 PH/46 Applied Jori Hamalainen's patch to add features to exiqsumm.
1925 PH/47 Put in an explicit test for a DNS lookup of an address record where the
1926 "domain" is actually an IP address, and force a failure. This locks out
1927 those revolvers/nameservers that support "A-for-A" lookups, in
1928 contravention of the specifications.
1930 PH/48 When a host name was looked up from an IP address, and the subsequent
1931 forward lookup of the name timed out, the host name was left in
1932 $sender_host_name, contrary to the specification.
1934 PH/49 Although default lookup types such as lsearch* or cdb*@ have always been
1935 restricted to single-key lookups, Exim was not diagnosing an error if
1936 * or *@ was used with a query-style lookup.
1938 PH/50 Increased the value of DH_BITS in tls-gnu.c from 768 to 1024.
1940 MH/01 local_scan ABI version incremented to 1.1. It should have been updated
1941 long ago, but noone interested enough thought of it. Let's just say that
1942 the "1.1" means that there are some new functions that weren't there at
1943 some point in the past.
1945 PH/51 Error processing for expansion failure of helo_data from an smtp
1946 transport during callout processing was broken.
1948 PH/52 Applied John Jetmore's patch to allow tls-on-connect and STARTTLS to be
1949 tested/used via the -bh/-bhc/-bs options.
1951 PH/53 Added missing "#include <time.h>" to pcre/pcretest.c (this was a PCRE
1952 bug, fixed in subsequent PCRE releases).
1954 PH/54 Applied Robert Bannocks' patch to avoid a problem with references that
1955 arises when using the Solaris LDAP libraries (but not with OpenLDAP).
1957 PH/55 Check for a ridiculously long file name in exim_dbmbuild.
1963 SC/01 Use a glob alias rather than an array ref in eximstats generated
1964 parser. This improves both readability and performance.
1966 SC/02 Collect SpamAssassin and rejection statistics in eximstats.
1967 Don't display local sender or destination tables in eximstats unless
1968 there is data to show.
1969 Added average volumes into the eximstats top table text output.
1971 SC/03 Collect data on the number of addresses (recipients) as well
1972 as the number of messages in eximstats.
1974 TF/01 Correct an error in the documentation for the redirect router. Exim
1975 does (usually) call initgroups() when daemonizing.
1977 TF/02 Call initgroups() when dropping privilege in exim.c, so that Exim runs
1978 with consistent privilege compared to when running as a daemon.
1980 TF/03 Note in the spec that $authenticated_id is not set for local
1981 submissions from trusted users.
1983 TF/04 The ratelimit per_rcpt option now works correctly in acl_not_smtp.
1984 Thanks to Dean Brooks <dean@iglou.com> for the patch.
1986 TF/05 Make it easier to get SMTP authentication and TLS/SSL support working
1987 by adding some example configuration directives to the default
1988 configuration file. A little bit of work is required to uncomment the
1989 directives and define how usernames and passwords are checked, but
1990 there is now a framework to start from.
1992 PH/01 Added #define LDAP_DEPRECATED 1 to ldap.c because some of the "old"
1993 functions that Exim currently uses aren't defined in ldap.h for OpenLDAP
1994 without this. I don't know how relevant this is to other LDAP libraries.
1996 PH/02 Add the verb name to the "unknown ACL verb" error.
1998 PH/03 Magnus Holmgren's patch for filter_prepend_home.
2000 PH/03 Fixed Bugzilla #101: macro definition between ACLs doesn't work.
2002 PH/04 Applied Magnus Holmgren's patch to fix Bugzilla #98: transport's home
2003 directory not expanded when it should be if an expanded home directory
2004 was set for the address (which is overridden by the transport).
2006 PH/05 Applied Alex Kiernan's patch to fix Bugzilla #99: a problem with
2009 PH/06 Added acl_not_smtp_start, based on Johannes Berg's patch, and set the
2010 bit to forbid control=suppress_local_fixups in the acl_not_smtp ACL,
2011 because it is too late at that time, and has no effect.
2013 PH/07 Changed ${quote_pgsql to quote ' as '' instead of \' because of a
2014 security issue with \' (bugzilla #107). I could not use the
2015 PQescapeStringConn() function, because it needs a PGconn value as one of
2018 PH/08 When testing addresses using -bt, indicate those final addresses that
2019 are duplicates that would not cause an additional delivery. At least one
2020 person was confused, thinking that -bt output corresponded to deliveries.
2021 (Suppressing duplicates isn't a good idea as you lose the information
2022 about possibly different redirections that led to the duplicates.)
2024 PH/09 Applied patch from Erik to use select() instead of poll() in spam.c on
2025 systems where poll() doesn't work, in particular OS X.
2027 PH/10 Added more information to debugging output for retry time not reached.
2029 PH/11 Applied patch from Arkadiusz Miskiewicz to apply a timeout to read
2030 operations in malware.c.
2032 PH/12 Applied patch from Magnus Holmgren to include the "h" tag in Domain Keys
2035 PH/13 If write_rejectlog was set false when logging was sent to syslog with
2036 syslog_duplication set false, log lines that would normally be written
2037 both the the main log and to the reject log were not written to syslog at
2040 PH/14 In the default configuration, change the use of "message" in ACL warn
2041 statements to "add_header".
2043 PH/15 Diagnose a filter syntax error for "seen", "unseen", or "noerror" if not
2044 not followed by a command (e.g. "seen endif").
2046 PH/16 Recognize SMTP codes at the start of "message" in ACLs and after :fail:
2047 and :defer: in a redirect router. Add forbid_smtp_code to suppress the
2050 PH/17 Added extra conditions to the default value of delay_warning_condition
2054 { !eq{$h_list-id:$h_list-post:$h_list-subscribe:}{} } \
2055 { match{$h_precedence:}{(?i)bulk|list|junk} } \
2056 { match{$h_auto-submitted:}{(?i)auto-generated|auto-replied} } \
2059 The Auto-Submitted: and various List- headers are standardised, whereas I
2060 don't think Precedence: ever was.
2062 PH/18 Refactored debugging code in route_finduser() to show more information,
2063 in particular, the error code if getpwnam() issues one.
2065 PH/19 Added PQsetClientEncoding(conn, "SQL_ASCII") to the pgsql code module.
2066 This is apparently needed in addition to the PH/07 change above to avoid
2067 any possible encoding problems.
2069 PH/20 Perl can change the locale. Exim was resetting it after a ${perl call,
2070 but not after initializing Perl.
2072 PH/21 Added a call to PQsetNoticeProcessor() to catch pgsql "notices" and
2073 output them only if debugging. By default they are written stderr,
2074 apparently, which is not desirable.
2076 PH/22 Added Alain Williams' LDAP patch to support setting REFERRALS=off on
2079 JJ/01 exipick: added --reverse (and -R synonym), --random, --size, --sort and
2082 JJ/02 exipick: rewrote --help documentation to hopefully make more clear.
2084 PH/23 Made -oMaa and -oMt work with -bh and -bs to pretend the connection is
2085 authenticated or an ident call has been made. Suppress the default
2086 values for $authenticated_id and $authenticated_sender (but permit -oMai
2087 and -oMas) when testing with -bh.
2089 PH/24 Re-jigged the order of the tests in the default configuration so that the
2090 tests for valid domains and recipients precede the DNS black list and CSA
2091 tests, on the grounds that those ones are more expensive.
2093 PH/25 Exim was not testing for a space following SMTP commands such as EHLO
2094 that require one. Thus, EHLORHUBARB was interpreted as a valid command.
2095 This bug exists in every version of Exim that I still have, right back to
2098 PH/26 (n)wildlsearch lookups are documented as being done case-insensitively.
2099 However, an attempt to turn on case-sensitivity in a regex key by
2100 including (?-i) didn't work because the subject string was already
2101 lowercased, and the effects were non-intuitive. It turns out that a
2102 one-line patch can be used to allow (?-i) to work as expected.
2108 TF/01 Fix the add_header change below (4.61 PH/55) which had a bug that (amongst
2109 other effects) broke the use of negated acl sub-conditions.
2111 PH/01 ${readsocket now supports Internet domain sockets (modified John Jetmore
2114 PH/02 When tcp-wrappers is called from Exim, it returns only "deny" or "allow".
2115 "Deny" causes Exim to reject the incoming connection with a 554 error.
2116 Unfortunately, if there is a major crisis, such as a disk failure,
2117 tcp-wrappers gives "deny", whereas what one would like would be some
2118 kind of temporary error. A kludge has been added to help with this.
2119 Before calling hosts_ctl(), errno is set zero. If the result is "deny", a
2120 554 error is used if errno is still zero or contains ENOENT (which occurs
2121 if either of the /etc/hosts.{allow,deny} files is missing). Otherwise, a
2124 PH/03 Add -lutil to the default FreeBSD LIBS setting.
2126 PH/04 Change PH/19 for 4.61 was too wide. It should not be applied to host
2127 errors. Otherwise a message that provokes a temporary error (when other
2128 messages do not) can cause a whole host to time out.
2130 PH/05 Batch deliveries by appendfile and pipe transports did not work when the
2131 addresses were routed directly to files or pipes from a redirect router.
2132 File deliveries just didn't batch; pipe deliveries might have suffered
2135 PH/06 A failure to get a lock for a hints database would erroneously always say
2136 "Failed to get write lock", even when it was really a read lock.
2138 PH/07 The appendfile transport was creating MBX lock files with a fixed mode
2139 of 0600. This has been changed to use the value of the lockfile_mode
2140 option (which defaults to 0600).
2142 PH/08 Applied small patch from the Sieve maintainer.
2144 PH/09 If maildir_quota_directory_regex was set to exclude (say) the .Trash
2145 folder from quota calculations, a direct delivery into this folder messed
2146 up the contents of the maildirsize file. This was because the regex was
2147 used only to exclude .Trash (or whatever) when the size of the mailbox
2148 was calculated. There was no check that a delivery was happening into an
2149 excluded directory. This bug has been fixed by ignoring all quota
2150 processing for deliveries into excluded directories.
2152 PH/10 Added the maildirfolder_create_regex option to appendfile.
2158 PH/01 The code for finding all the local interface addresses on a FreeBSD
2159 system running IPv6 was broken. This may well have applied to all BSD
2160 systems, as well as to others that have similar system calls. The broken
2161 code found IPv4 interfaces correctly, but gave incorrect values for the
2162 IPv6 interfaces. In particular, ::1 was not found. The effect in Exim was
2163 that it would not match correctly against @[] and not recognize the IPv6
2166 PH/02 The ipliteral router was not recognizing addresses of the form user@
2167 [ipv6:....] because it didn't know about the "ipv6:" prefix.
2169 PH/03 Added disable_ipv6.
2171 PH/04 Changed $reply_address to use the raw form of the headers instead of the
2172 decoded form, because it is most often used to construct To: headers
2173 lines in autoreplies, and the decoded form may well be syntactically
2174 invalid. However, $reply_address has leading white space removed, and all
2175 newlines turned into spaces so that the autoreply transport does not
2178 PH/05 If group was specified without a user on a router, and no group or user
2179 was specified on a transport, the group from the router was ignored.
2181 PH/06 Increased the number of ACL variables to 20 of each type, and arranged
2182 for visible compile-time settings that can be used to change these
2183 numbers, for those that want even more. Backwards compatibility with old
2184 spool files has been maintained. However, going back to a previous Exim
2185 release will lost any variables that are in spool files.
2187 PH/07 Two small changes when running in the test harness: increase delay when
2188 passing a TCP/IP connection to a new process, in case the original
2189 process has to generate a bounce, and remove special handling of
2190 127.0.0.2 (sic), which is no longer necessary.
2192 PH/08 Changed debug output of dbfn_open() flags from numbers to names, so as to
2193 be the same on different OS.
2195 PH/09 Moved a debug statement in filter processing to avoid a race problem when
2198 JJ/01 exipick: fixed bug where -b (brief) output option showed "Vars:"
2199 whether --show-vars was specified or not
2201 JJ/02 exipick: Added support for new ACL variable spool format introduced
2204 PH/10 Fixed another bug related to PH/04 above: if an incoming message had a
2205 syntactically invalid From: or Reply-to: line, and a filter used this to
2206 generate an autoreply, and therefore failed to obtain an address for the
2207 autoreply, Exim could try to deliver to a non-existent relative file
2208 name, causing unrelated and misleading errors. What now happens is that
2209 it logs this as a hard delivery error, but does not attempt to create a
2212 PH/11 The exinext utility has a -C option for testing purposes, but although
2213 the given file was scanned by exinext itself; it wasn't being passed on
2214 when Exim was called.
2216 PH/12 In the smtp transport, treat an explicit ECONNRESET error the same as
2217 an end-of-file indication when reading a command response.
2219 PH/13 Domain literals for IPv6 were not recognized unless IPv6 support was
2220 compiled. In many other places in Exim, IPv6 addresses are always
2221 recognized, so I have changed this. It also means that IPv4 domain
2222 literals of the form [IPV4:n.n.n.n] are now always recognized.
2224 PH/14 When a uid/gid is specified for the queryprogram router, it cannot be
2225 used if the router is not running as root, for example, when verifying at
2226 ACL time, or when using -bh. The debugging output from this situation was
2227 non-existent - all you got was a failure to exec. I have made two
2230 (a) Failures to set uid/gid, the current directory, or a process leader
2231 in a subprocess such as that created by queryprogram now generate
2232 suitable debugging ouput when -d is set.
2234 (b) The queryprogram router detects when it is not running as root,
2235 outputs suitable debugging information if -d is set, and then runs
2236 the subprocess without attempting to change uid/gid.
2238 PH/15 Minor change to Makefile for building test_host (undocumented testing
2241 PH/16 As discussed on the list in Nov/Dec: Exim no longer looks at the
2242 additional section of a DNS packet that returns MX or SRV records.
2243 Instead, it always explicitly searches for A/AAAA records. This avoids
2244 major problems that occur when a DNS server includes only records of one
2245 type (A or AAAA) in an MX/SRV packet. A byproduct of this change has
2246 fixed another bug: if SRV records were looked up and the corresponding
2247 address records were *not* found in the additional section, the port
2248 values from the SRV records were lost.
2250 PH/17 If a delivery to a pipe, file, or autoreply was deferred, Exim was not
2251 using the correct key (the original address) when searching the retry
2252 rules in order to find which one to use for generating the retry hint.
2254 PH/18 If quota_warn_message contains a From: header, Exim now refrains from
2255 adding the default one. Similarly, if it contains a Reply-To: header, the
2256 errors_reply_to option, if set, is not used.
2258 PH/19 When calculating a retry time, Exim used to measure the "time since
2259 failure" by looking at the "first failed" field in the retry record. Now
2260 it does not use this if it is later than than the arrival time of the
2261 message. Instead it uses the arrival time. This makes for better
2262 behaviour in cases where some deliveries succeed, thus re-setting the
2263 "first failed" field. An example is a quota failure for a huge message
2264 when small messages continue to be delivered. Without this change, the
2265 "time since failure" will always be short, possible causing more frequent
2266 delivery attempts for the huge message than are intended.
2267 [Note: This change was subsequently modified - see PH/04 for 4.62.]
2269 PH/20 Added $auth1, $auth2, $auth3 to contain authentication data (as well as
2270 $1, $2, $3) because the numerical variables can be reset during some
2271 expansion items (e.g. "match"), thereby losing the authentication data.
2273 PH/21 Make -bV show the size of off_t variables so that the test suite can
2274 decide whether to run tests for quotas > 2G.
2276 PH/22 Test the values given for quota, quota_filecount, quota_warn_threshold,
2277 mailbox_size, and mailbox_filecount in the appendfile transport. If a
2278 filecount value is greater than 2G or if a quota value is greater than 2G
2279 on a system where the size of off_t is not greater than 4, a panic error
2282 PH/23 When a malformed item such as 1.2.3/24 appears in a host list, it can
2283 never match. The debug and -bh output now contains an explicit error
2284 message indicating a malformed IPv4 address or mask.
2286 PH/24 An host item such as 1.2.3.4/abc was being treated as the IP address
2287 1.2.3.4 without a mask. Now it is not recognized as an IP address, and
2288 PH/23 above applies.
2290 PH/25 Do not write to syslog when running in the test harness. The only
2291 occasion when this arises is a failure to open the main or panic logs
2292 (for which there is an explicit test).
2294 PH/26 Added the /no_tell option to "control=freeze".
2296 PH/27 If a host name lookup failed very early in a connection, for example, if
2297 the IP address matched host_lookup and the reverse lookup yielded a name
2298 that did not have a forward lookup, an error message of the form "no IP
2299 address found for host xxx.xxx.xxx (during SMTP connection from NULL)"
2300 could be logged. Now it outputs the IP address instead of "NULL".
2302 PH/28 An enabling patch from MH: add new function child_open_exim2() which
2303 allows the sender and the authenticated sender to be set when
2304 submitting a message from within Exim. Since child_open_exim() is
2305 documented for local_scan(), the new function should be too.
2307 PH/29 In GnuTLS, a forced expansion failure for tls_privatekey was not being
2308 ignored. In both GnuTLS and OpenSSL, an expansion of tls_privatekey that
2309 results in an empty string is now treated as unset.
2311 PH/30 Fix eximon buffer overflow bug (Bugzilla #73).
2313 PH/31 Added sender_verify_fail logging option.
2315 PH/32 In November 2003, the code in Exim that added an empty Bcc: header when
2316 needed by RFC 822 but not by RFC 2822 was commented out. I have now
2317 tidied the source and removed it altogether.
2319 PH/33 When a queue run was abandoned because the load average was too high, a
2320 log line was always written; now it is written only if the queue_run log
2321 selector is set. In addition, the log line for abandonment now contains
2322 information about the queue run such as the pid. This is always present
2323 in "start" and "stop" lines but was omitted from the "abandon" line.
2325 PH/34 Omit spaces between a header name and the colon in the error message that
2326 is given when verify = headers_syntax fails (if there are lots of them,
2327 the message gets confusing).
2329 PH/35 Change the default for dns_check_names_pattern to allow slashes within
2330 names, as there are now some PTR records that contain slashes. This check
2331 is only to protect against broken name servers that fall over on strange
2332 characters, so the fact that it applies to all lookups doesn't matter.
2334 PH/36 Now that the new test suite is complete, we can remove some of the
2335 special code in Exim that was needed for the old test suite. For example,
2336 sorting DNS records because real resolvers return them in an arbitrary
2337 order. The new test suite's fake resolver always returns records in the
2340 PH/37 When running in the test harness, use -odi for submitted messages (e.g.
2341 bounces) except when queue_only is set, to avoid logging races between
2342 the different processes.
2344 PH/38 Panic-die if .include specifies a non-absolute path.
2346 PH/39 A tweak to the "H" retry rule from its user.
2348 JJ/03 exipick: Removed parentheses from 'next' and 'last' calls that specified
2349 a label. They prevented compilation on older perls.
2351 JJ/04 exipick: Refactored code to prevent implicit split to @_ which caused
2352 a warning to be raised on newish perls.
2354 JJ/05 exipick: Fixed bug where -bpc always showed a count of all messages
2355 on queue. Changes to match documented behaviour of showing count of
2356 messages matching specified criteria.
2358 PH/40 Changed the default ident timeout from 30s to 5s.
2360 PH/41 Added support for the use of login_cap features, on those BSD systems
2361 that have them, for controlling the resources used by pipe deliveries.
2363 PH/42 The content-scanning code uses fopen() to create files in which to put
2364 message data. Previously it was not paying any attention to the mode of
2365 the files. Exim runs with umask(0) because the rest of the code creates
2366 files with open(), and sets the required mode explicitly. Thus, these
2367 files were ending up world-writeable. This was not a big issue, because,
2368 being within the spool directory, they were not world-accessible. I have
2369 created a function called modefopen, which takes an additional mode
2370 argument. It sets umask(777), creates the file, chmods it to the required
2371 mode, then resets the umask. All the relevant calls to fopen() in the
2372 content scanning code have been changed to use this function.
2374 PH/43 If retry_interval_max is set greater than 24 hours, it is quietly reset
2375 to 24 hours. This avoids potential overflow problems when processing G
2376 and H retry rules. I suspect nobody ever tinkers with this value.
2378 PH/44 Added STRIP_COMMAND=/usr/bin/strip to the FreeBSD Makefile.
2380 PH/45 When the plaintext authenticator is running as a client, the server's
2381 challenges are checked to ensure they are valid base64 strings. By
2382 default, the authentication attempt is cancelled if an invalid string is
2383 received. Setting client_ignore_invalid_base64 true ignores these errors.
2384 The decoded challenge strings are now placed in $auth1, $auth2, etc. as
2385 they are received. Thus, the responses can be made to depend on the
2386 challenges. If an invalid string is ignored, an empty string is placed in
2389 PH/46 Messages that are created by the autoreply transport now contains a
2390 References: header, in accordance with RFCs 2822 and 3834.
2392 PH/47 Added authenticated_sender_force to the smtp transport.
2394 PH/48 The ${prvs expansion was broken on systems where time_t was long long.
2396 PH/49 Installed latest patch from the Sieve maintainer.
2398 PH/50 When an Exim quota was set without a file count quota, and mailbox_size
2399 was also set, the appendfile transport was unnecessarily scanning a
2400 directory of message files (e.g. for maildir delivery) to find the count
2401 of files (along with the size), even though it did not need this
2402 information. It now does the scan only if it needs to find either the
2403 size of the count of files.
2405 PH/51 Added ${time_eval: to convert Exim time strings into seconds.
2407 PH/52 Two bugs concerned with error handling when the smtp transport is
2410 (i) Exim was not creating retry information for temporary errors given
2411 for individual recipients after the DATA command when the smtp transport
2412 was used in LMTP mode. This meant that they could be retried too
2413 frequently, and not timed out correctly.
2415 (ii) Exim was setting the flag that allows error details to be returned
2416 for LMTP errors on RCPT commands, but not for LMTP errors for individual
2417 recipients that were returned after the DATA command.
2419 PH/53 This is related to PH/52, but is more general: for any failing address,
2420 when detailed error information was permitted to be returned to the
2421 sender, but the error was temporary, then after the final timeout, only
2422 "retry timeout exceeded" was returned. Now it returns the full error as
2423 well as "retry timeout exceeded".
2425 PH/54 Added control=allow_auth_unadvertised, as it seems there are clients that
2426 do this, and (what is worse) MTAs that accept it.
2428 PH/55 Added the add_header modified to ACLs. The use of "message" with "warn"
2429 will now be deprecated.
2431 PH/56 New os.c-cygwin from the Cygwin maintainer.
2433 JJ/06 exipick: added --unsorted option to allow unsorted output in all output
2434 formats (previously only available in exim formats via -bpr, -bpru,
2435 and -bpra. Now also available in native and exiqgrep formats)
2437 JJ/07 exipick: added --freeze and --thaw options to allow faster interaction
2438 with very large, slow to parse queues
2440 JJ/08 exipick: added ! as generic prefix to negate any criteria format
2442 JJ/09 exipick: miscellaneous performance enhancements (~24% improvements)
2444 PH/57 Tidies in SMTP dialogue display in debug output: (i) It was not showing
2445 responses to authentication challenges, though it was showing the
2446 challenges; (ii) I've removed the CR characters from the debug output for
2449 PH/58 Allow for the insertion of a newline as well as a space when a string
2450 is turned into more than one encoded-word during RFC 2047 encoding. The
2451 Sieve code now uses this.
2453 PH/59 Added the following errors that can be detected in retry rules: mail_4xx,
2454 data_4xx, lost_connection, tls_required.
2456 PH/60 When a VRFY deferred or FAILED, the log message rather than the user
2457 message was being sent as an SMTP response.
2459 PH/61 Add -l and -k options to exicyclog.
2461 PH/62 When verifying, if an address was redirected to one new address, so that
2462 verification continued, and the new address failed or deferred after
2463 having set something in $address_data, the value of $address_data was not
2464 passed back to the ACL. This was different to the case when no
2465 redirection occurred. The value is now passed back in both cases.
2467 PH/63 Changed the macro HAVE_LOGIN_CAP (see PH/41 for this release above) to
2468 HAVE_SETCLASSRESOURCES because there are different APIs in use that all
2469 use login_cap.h, so on its own it isn't the distinguishing feature. The
2470 new name refers directly to the setclassresources() function.
2472 PH/65 Added configuration files for NetBSD3.
2474 PH/66 Updated OS/Makefile-HP-UX for gcc 4.1.0 with HP-UX 11.
2476 PH/67 Fixed minor infelicity in the sorting of addresses to ensure that IPv6
2477 is preferred over IPv4.
2479 PH/68 The bounce_return_message and bounce_return_body options were not being
2480 honoured for bounces generated during the reception of non-SMTP messages.
2481 In particular, this applied to messages rejected by the ACL. This bug has
2482 been fixed. However, if bounce_return_message is true and bounce_return_
2483 body is false, the headers that are returned for a non-SMTP message
2484 include only those that have been read before the error was detected.
2485 (In the case of an ACL rejection, they have all been read.)
2487 PH/69 The HTML version of the specification is now built in a directory called
2488 spec_html instead of spec.html, because the latter looks like a path with
2489 a MIME-type, and this confuses some software.
2491 PH/70 Catch two compiler warnings in sieve.c.
2493 PH/71 Fixed an obscure and subtle bug (thanks Alexander & Matthias). The
2494 function verify_get_ident() calls ip_connect() to connect a socket, but
2495 if the "connect()" function timed out, ip_connect() used to close the
2496 socket. However, verify_get_ident() also closes the socket later, and in
2497 between Exim writes to the log, which may get opened at this point. When
2498 the socket was closed in ip_connect(), the log could get the same file
2499 descriptor number as the socket. This naturally causes chaos. The fix is
2500 not to close the socket in ip_connect(); the socket should be closed by
2501 the function that creates it. There was only one place in the code where
2502 this was missing, in the iplookup router, which I don't think anybody now
2503 uses, but I've fixed it anyway.
2505 PH/72 Make dns_again_means_nonexist apply to lookups using gethostbyname() as
2506 well as to direct DNS lookups. Otherwise the handling of names in host
2507 lists is inconsistent and therefore confusing.
2513 PH/01 Two changes to the default runtime configuration:
2515 (1) Move the checks for relay_from_hosts and authenticated clients from
2516 after to before the (commented out) DNS black list checks.
2518 (2) Add control=submission to the relay_from_hosts and authenticated
2519 clients checks, on the grounds that messages accepted by these
2520 statements are most likely to be submissions.
2522 PH/02 Several tidies to the handling of ${prvs and ${prvscheck:
2524 (1) Generate an error if the third argument for the ${prvs expansion is
2527 (2) Treat a missing third argument of ${prvscheck as if it were an empty
2530 (3) Reset the variables that are obtained from the first argument of
2531 ${prvscheck and used in the second argument before leaving the code,
2532 because their memory is reclaimed, so using them afterwards may do
2535 (4) Tidy up the code for expanding the arguments of ${prvscheck one by
2536 one (it's much easier than Tom thought :-).
2538 (5) Because of (4), we can now allow for the use of $prvscheck_result
2539 inside the third argument.
2541 PH/03 For some reason, the default setting of PATH when running a command from
2542 a pipe transport was just "/usr/bin". I have changed it to
2545 PH/04 SUPPORT_TRANSLATE_IP_ADDRESS and MOVE_FROZEN_MESSAGES did not cause
2546 anything to be listed in the output from -bV.
2548 PH/05 When a filter generated an autoreply, the entire To: header line was
2549 quoted in the delivery log line, like this:
2551 => >A.N.Other <ano@some.domain> <original@ddress> ...
2553 This has been changed so that it extracts the operative address. There
2554 may be more than one such address. If so, they are comma-separated, like
2557 => >ano@some.domain,ona@other.domain <original@ddress> ...
2559 PH/06 When a client host used a correct literal IP address in a HELO or EHLO
2560 command, (for example, EHLO [1.2.3.4]) and the client's IP address was
2561 not being looked up in the rDNS to get a host name, Exim was showing the
2562 IP address twice in Received: lines, even though the IP addresses were
2563 identical. For example:
2565 Received: from [1.2.3.4] (helo=[1.2.3.4])
2567 However, if the real host name was known, it was omitting the HELO data
2568 if it matched the actual IP address. This has been tidied up so that it
2569 doesn't show the same IP address twice.
2571 PH/07 When both +timestamp and +memory debugging was on, the value given by
2572 $tod_xxx expansions could be wrong, because the tod_stamp() function was
2573 called by the debug printing, thereby overwriting the timestamp buffer.
2574 Debugging no longer uses the tod_stamp() function when +timestamp is set.
2576 PH/08 When the original message was included in an autoreply transport, it
2577 always said "this is a copy of the message, including all the headers",
2578 even if body_only or headers_only was set. It now gives an appropriate
2581 PH/09 Applied a patch from the Sieve maintainer which:
2583 o fixes some comments
2584 o adds the (disabled) notify extension core
2585 o adds some debug output for the result of if/elsif tests
2586 o points to the current vacation draft in the documentation
2587 and documents the missing references header update
2591 o fixes a bug in processing the envelope test (when testing
2592 multiple envelope elements, the last element determinted the
2595 PH/10 Exim was violating RFC 3834 ("Recommendations for Automatic Responses to
2596 Electronic Mail") by including:
2598 Auto-submitted: auto-generated
2600 in the messages that it generates (bounce messages and others, such as
2601 warnings). In the case of bounce messages for non-SMTP mesages, there was
2602 also a typo: it was using "Auto_submitted" (underscore instead of
2603 hyphen). Since every message generated by Exim is necessarily in response
2604 to another message, thes have all been changed to:
2606 Auto-Submitted: auto-replied
2608 in accordance with these statements in the RFC:
2610 The auto-replied keyword:
2612 - SHOULD be used on messages sent in direct response to another
2613 message by an automatic process,
2615 - MUST NOT be used on manually-generated messages,
2617 - MAY be used on Delivery Status Notifications (DSNs) and Message
2618 Disposition Notifications (MDNs),
2620 - MUST NOT be used on messages generated by automatic or periodic
2621 processes, except for messages which are automatic responses to
2624 PH/11 Added "${if def:sender_address {(envelope-from <$sender_address>)\n\t}}"
2625 to the default Received: header definition.
2627 PH/12 Added log selector acl_warn_skipped (default on).
2629 PH/13 After a successful wildlsearch lookup, discard the values of numeric
2630 variables because (a) they are in the wrong storage pool and (b) even if
2631 they were copied, it wouldn't work properly because of the caching.
2633 PH/14 Add check_rfc2047_length to disable enforcement of RFC 2047 length
2634 checking when decoding. Apparently there are clients that generate
2635 overlong encoded strings. Why am I not surprised?
2637 PH/15 If the first argument of "${if match_address" was not empty, but did not
2638 contain an "@" character, Exim crashed. Now it writes a panic log message
2639 and treats the condition as false.
2641 PH/16 In autoreply, treat an empty string for "once" the same as unset.
2643 PH/17 A further patch from the Sieve maintainer: "Introduce the new Sieve
2644 extension "envelope-auth". The code is finished and in agreement with
2645 other implementations, but there is no documentation so far and in fact,
2646 nobody wrote the draft yet. This extension is currently #undef'ed, thus
2647 not changing the active code.
2649 Print executed "if" and "elsif" statements when debugging is used. This
2650 helps a great deal to understand what a filter does.
2652 Document more things not specified clearly in RFC3028. I had all this
2653 sorted out, when out of a sudden new issues came to my mind. Oops."
2655 PH/18 Exim was not recognizing the "net-" search type prefix in match_ip lists
2658 PH/19 Exim expands the IPv6 address given to -bh to its full non-abbreviated
2659 canonical form (as documented). However, after a host name lookup from
2660 the IP address, check_host() was doing a simple string comparison with
2661 addresses acquired from the DNS when checking that the found name did
2662 have the original IP as one of its addresses. Since any found IPv6
2663 addresses are likely to be in abbreviated form, the comparison could
2664 fail. Luckily, there already exists a function for doing the comparison
2665 by converting both addresses to binary, so now that is used instead of
2666 the text comparison.
2668 PH/20 There was another similar case to PH/19, when a complete host name was
2669 given in a host list; looking up its IP address could give an abbreviated
2670 form, whereas the current host's name might or might not be abbreviated.
2671 The same fix has been applied.
2677 PH/01 The ${base62: operator adjusted itself to base 36 when BASE_62 was
2678 set to 36 (for Darwin and Cygwin), but the ${base62d: operator did not.
2681 PH/02 Two minor problems detected in Cygwin: the os.{c,h} files had lost */ on
2682 the CVS lines, and there was a missing #if HAVE_IPV6 in host.c.
2684 PH/03 Typo: missing ".o" in src/pcre/Makefile.
2686 PH/04 Tighten up "personal" tests: Instead of testing for any "List-"
2687 header line, restrict the check to what is listed in RFCs 2369 and 2929.
2688 Also, for "Auto-Submitted", treat anything other than "no" as
2689 non-personal, in accordance with RFC 3834. (Previously it treated
2690 anything starting "auto-" as non-personal.)
2692 TF/01 The control=submission/name=... option had a problem with syntax
2693 errors if the name included a slash character. The /name= option
2694 now slurps the rest of the string, so it can include any characters
2695 but it must come last in the list of options (after /sender_retain
2698 PH/05 Some modifications to the interface to the fake nameserver for the new
2706 TK/01 Added the "success_on_redirect" address verification option. See
2707 NewStuff for rationale and an example.
2709 PH/01 Added support for SQLite, basic code supplied by David Woodhouse.
2711 PH/02 Patch to exigrep to allow it to work on syslog lines.
2713 PH/03 When creating an mbox file for a virus/spam scan, use fseek() instead of
2714 fread() to skip over the body file's header line, because in Cygwin the
2715 header line is locked and is inaccessible.
2717 PH/04 Added $message_exim_id, ultimately to replace $message_id (they will both
2718 co-exist for some time) to make it clear that it is the Exim ID that is
2719 referenced, not the Message-ID: header line.
2721 PH/05 Replaced all Tom's calls to snprintf() with calls to the internal
2722 string_format() function, because snprintf() does not exist on all
2725 PH/06 The use of forbid_filter_existstest now also locks out the use of the
2726 ${stat: expansion item.
2728 PH/07 Changed "SMTP protocol violation: synchronization error" into "SMTP
2729 protocol synchronization error", to keep the pedants happy.
2731 PH/08 Arrange for USE_INET_NTOA_FIX to be set in config.h for AIX systems as
2732 well as for IRIX systems, when gcc is being used. See the host.c source
2735 PH/09 Installed latest Cygwin configuration files from the Cygwin maintainer.
2737 PH/10 Named domain lists were not working if used in a queue_smtp_domains
2740 PH/11 Added support for the IGNOREQUOTA extension to LMTP, both to the lmtp
2741 transport and to the smtp transport in LMTP mode.
2743 TK/02 Remove one case of BASE64 error detection FTTB (undocumented anyway).
2745 PH/12 There was a missing call to search_tidyup() before the fork() in rda.c to
2746 run a filter in a subprocess. This could lead to confusion in subsequent
2747 lookups in the parent process. There should also be a search_tidyup() at
2748 the end of the subprocess.
2750 PH/13 Previously, if "verify = helo" was set in an ACL, the condition was true
2751 only if the host matched helo_try_verify_hosts, which caused the
2752 verification to occur when the EHLO/HELO command was issued. The ACL just
2753 tested the remembered result. Now, if a previous verification attempt has
2754 not happened, "verify = helo" does it there and then.
2756 JJ/01 exipick: added $message_exim_id variable (see 4.53-PH/04)
2758 TK/03 Fix log output including CR from clamd.
2760 PH/14 A reference to $reply_address when Reply-to: was empty and From: did not
2761 exist provoked a memory error which could cause a segfault.
2763 PH/15 Installed PCRE 6.2
2765 PH/17 Defined BIND_8_COMPAT in the Darwin os.h file.
2767 PH/18 Reversed 4.52/PH/17 because the HP-UX user found it wasn't the cause
2768 of the problem. Specifically, suggested +O2 rather than +O1 for the
2771 PH/19 Added sqlite_lock_timeout option (David Woodhouse's patch).
2773 PH/20 If a delivery was routed to a non-standard port by means of an SRV
2774 record, the port was not correctly logged when the outgoing_port log
2775 selector was set (it logged the transort's default port).
2777 PH/21 Added support for host-specific ports to manualroute, queryprogram,
2778 fallback_hosts, and "hosts" in the smtp transport.
2780 PH/22 If the log selector "outgoing_port" is set, the port is now also given on
2781 host errors such as "Connection refused".
2783 PH/23 Applied a patch to fix problems with exim-4.52 while doing radius
2784 authentication with radiusclient 0.4.9:
2786 - Error returned from rc_read_config was caught wrongly
2787 - Username/password not passed on to radius server due to wrong length.
2789 The presumption is that some radiusclient API changes for 4.51/PH/17
2790 were not taken care of correctly. The code is still untested by me (my
2791 Linux distribution still has 0.3.2 of radiusclient), but it was
2792 contributed by a Radius user.
2794 PH/24 When doing a callout, the value of $domain wasn't set correctly when
2795 expanding the "port" option of the smtp transport.
2797 TK/04 MIME ACL: Fix buffer underrun that occurs when EOF condition is met
2798 while reading a MIME header. Thanks to Tom Hughes for a patch.
2800 PH/24 Include config.h inside local_scan.h so that configuration settings are
2803 PH/25 Make $smtp_command_argument available after all SMTP commands. This means
2804 that in an ACL for RCPT (for example), you can examine exactly what was
2807 PH/26 Exim was recognizing IPv6 addresses of the form [IPv6:....] in EHLO
2808 commands, but it was not correctly comparing the address with the actual
2809 client host address. Thus, it would show the EHLO address in Received:
2810 header lines when this was not necessary.
2812 PH/27 Added the % operator to ${eval:}.
2814 PH/28 Exim tries to create and chdir to its spool directory when it starts;
2815 it should be ignoring failures (because with -C, for example, it has lost
2816 privilege). It wasn't ignoring creation failures other than "already
2819 PH/29 Added "crypteq" to the list of supported features that Exim outputs when
2822 PH/30 Fixed (presumably very longstanding) bug in exim_dbmbuild: if it failed
2823 because an input line was too long, either on its own, or by virtue of
2824 too many continuations, the temporary file was not being removed, and the
2825 return code was incorrect.
2827 PH/31 Missing "BOOL" in function definition in filtertest.c.
2829 PH/32 Applied Sieve patches from the maintainer.
2831 TK/05 Domainkeys: Accomodate for a minor API change in libdomainkeys 0.67.
2833 PH/33 Added "verify = not_blind".
2835 PH/34 There are settings for CHOWN_COMMAND and MV_COMMAND that can be used in
2836 Local/Makefile (with some defaults set). These are used in built scripts
2837 such as exicyclog, but they have never been used in the exim_install
2838 script (though there are many overriding facilities there). I have
2839 arranged that the exim_install script now takes note of these two
2842 PH/35 Installed configuration files for Dragonfly.
2844 PH/36 When a locally submitted message by a trusted user did not contain a
2845 From: header, and the sender address was obtained from -f or from an SMTP
2846 MAIL command, and the trusted user did not use -F to supply a sender
2847 name, $originator_name was incorrectly used when constructing a From:
2848 header. Furthermore, $originator_name was used for submission mode
2849 messages from external hosts without From: headers in a similar way,
2850 which is clearly wrong.
2852 PH/37 Added control=suppress_local_fixups.
2854 PH/38 When log_selector = +received_sender was set, and the addition of the
2855 sender made the log line's construction buffer exactly full, or one byte
2856 less than full, an overflow happened when the terminating "\n" was
2859 PH/39 Added a new log selector, "unknown_in_list", which provokes a log entry
2860 when the result of a list match is failure because a DNS lookup failed.
2862 PH/40 RM_COMMAND is now used in the building process.
2864 PH/41 Added a "distclean" target to the top-level Makefile; it deletes all
2865 the "build-* directories that it finds.
2867 PH/42 (But a TF fix): In a domain list, Exim incorrectly matched @[] if the IP
2868 address in a domain literal was a prefix of an interface address.
2870 PH/43 (Again a TF fix): In the dnslookup router, do not apply widen_domains
2871 when verifying a sender address, unless rewrite_headers is false.
2873 PH/44 Wrote a long comment about why errors_to addresses are verified as
2874 recipients, not senders.
2876 TF/01 Add missing LIBS=-lm to OS/Makefile-OpenBSD which was overlooked when
2877 the ratelimit ACL was added.
2879 PH/45 Added $smtp_command for the full command (cf $smtp_command_argument).
2881 PH/46 Added extra information about PostgreSQL errors to the error string.
2883 PH/47 Added an interface to a fake DNS resolver for use by the new test suite,
2884 avoiding the need to install special zones in a real server. This is
2885 backwards compatible; if it can't find the fake resolver, it drops back.
2886 Thus, both old and new test suites can be run.
2888 TF/02 Added util/ratelimit.pl
2890 TF/03 Minor fix to the ratelimit code to improve its behaviour in case the
2891 clock is set back in time.
2893 TF/04 Fix the ratelimit support in exim_fixdb. Patch provided by Brian
2894 Candler <B.Candler@pobox.com>.
2896 TF/05 The fix for PH/43 was not completely correct; widen_domains is always
2897 OK for addresses that are the result of redirections.
2899 PH/48 A number of further additions for the benefit of the new test suite,
2900 including a fake gethostbyname() that interfaces to the fake DNS resolver
2903 TF/06 The fix for widen_domains has also been applied to qualify_single and
2904 search_parents which are the other dnslookup options that can cause
2907 PH/49 Michael Haardt's randomized retrying, but as a separate retry parameter
2910 PH/50 Make never_users, trusted_users, admin_groups, trusted_groups expandable.
2912 TF/07 Exim produced the error message "an SRV record indicated no SMTP
2913 service" if it encountered an MX record with an empty target hostname.
2914 The message is now "an MX or SRV record indicated no SMTP service".
2916 TF/08 Change PH/13 introduced the possibility that verify=helo may defer,
2917 if the DNS of the sending site is misconfigured. This is quite a
2918 common situation. This change restores the behaviour of treating a
2919 helo verification defer as a failure.
2921 PH/51 If self=fail was set on a router, the bounce message did not include the
2922 actual error message.
2928 TF/01 Added support for Client SMTP Authorization. See NewStuff for details.
2930 PH/01 When a transport filter timed out in a pipe delivery, and the pipe
2931 command itself ended in error, the underlying message about the transport
2932 filter timeout was being overwritten with the pipe command error. Now the
2933 underlying error message should be appended to the second error message.
2935 TK/01 Fix poll() being unavailable on Mac OSX 10.2.
2937 PH/02 Reduce the amount of output that "make" produces by default. Full output
2938 can still be requested.
2940 PH/03 The warning log line about a condition test deferring for a "warn" verb
2941 was being output only once per connection, rather than after each
2942 occurrence (because it was using the same function as for successful
2943 "warn" verbs). This seems wrong, so I have changed it.
2945 TF/02 Two buglets in acl.c which caused Exim to read a few bytes of memory that
2946 it should not have, which might have caused a crash in the right
2947 circumstances, but probably never did.
2949 PH/04 Installed a modified version of Tony Finch's patch to make submission
2950 mode fix the return path as well as the Sender: header line, and to
2951 add a /name= option so that you can make the user's friendly name appear
2954 TF/03 Added the control = fakedefer ACL modifier.
2956 TF/04 Added the ratelimit ACL condition. See NewStuff for details. Thanks to
2957 Mark Lowes for thorough testing.
2959 TK/02 Rewrote SPF support to work with libspf2 versions >1.2.0.
2961 TK/03 Merged latest SRS patch from Miles Wilton.
2963 PH/05 There's a shambles in IRIX6 - it defines EX_OK in unistd.h which conflicts
2964 with the definition in sysexits.h (which is #included earlier).
2965 Fortunately, Exim does not actually use EX_OK. The code used to try to
2966 preserve the sysexits.h value, by assumimg that macro definitions were
2967 scanned for macro replacements. I have been disabused of this notion,
2968 so now the code just undefines EX_OK before #including unistd.h.
2970 PH/06 There is a timeout for writing blocks of data, set by, e.g. data_timeout
2971 in the smtp transport. When a block could not be written in a single
2972 write() function, the timeout was being re-applied to each part-write.
2973 This seems wrong - if the receiver was accepting one byte at a time it
2974 would take for ever. The timeout is now adjusted when this happens. It
2975 doesn't have to be particularly precise.
2977 TK/04 Added simple SPF lookup method in EXPERIMENTAL_SPF. See NewStuff for
2978 details. Thanks to Chris Webb <chris@arachsys.com> for the patch!
2980 PH/07 Added "fullpostmaster" verify option, which does a check to <postmaster>
2981 without a domain if the check to <postmaster@domain> fails.
2983 SC/01 Eximstats: added -xls and the ability to specify output files
2984 (patch written by Frank Heydlauf).
2986 SC/02 Eximstats: use FileHandles for outputing results.
2988 SC/03 Eximstats: allow any combination of xls, txt, and html output.
2990 SC/04 Eximstats: fixed display of large numbers with -nvr option
2992 SC/05 Eximstats: fixed merging of reports with empty tables.
2994 SC/06 Eximstats: added the -include_original_destination flag
2996 SC/07 Eximstats: removed tabs and trailing whitespace.
2998 TK/05 Malware: Improve on aveserver error handling. Patch from Alex Miller.
3000 TK/06 MBOX spool code: Add real "From " MBOX separator line
3001 so the .eml file is really in mbox format (even though
3002 most programs do not really care). Patch from Alex Miller.
3004 TK/07 MBOX spool code: Add X-Envelope-From: and X-Envelope-To: headers.
3005 The latter is generated from $received_to and is only set if the
3006 message has one envelope recipient. SA can use these headers,
3007 obviously out-of-the-box. Patch from Alex Miller.
3009 PH/08 The ${def test on a variable was returning false if the variable's
3010 value was "0", contrary to what the specification has always said!
3011 The result should be true unless the variable is empty.
3013 PH/09 The syntax error of a character other than { following "${if
3014 def:variable_name" (after optional whitespace) was not being diagnosed.
3015 An expansion such as ${if def:sender_ident:{xxx}{yyy}} in which an
3016 accidental colon was present, for example, could give incorrect results.
3018 PH/10 Tidied the code in a number of places where the st_size field of a stat()
3019 result is used (not including appendfile, where other changes are about
3022 PH/11 Upgraded appendfile so that quotas larger than 2G are now supported.
3023 This involved changing a lot of size variables from int to off_t. It
3024 should work with maildirs and everything.
3026 TK/08 Apply fix provided by Michael Haardt to prevent deadlock in case of
3027 spamd dying while we are connected to it.
3029 TF/05 Fixed a ${extract error message typo reported by Jeremy Harris
3032 PH/12 Applied Alex Kiernan's patch for the API change for the error callback
3033 function for BDB 4.3.
3035 PH/13 Changed auto_thaw such that it does not apply to bounce messages.
3037 PH/14 Imported PCRE 6.0; this was more than just a trivial operation because
3038 the sources for PCRE have been re-arranged and more files are now
3041 PH/15 The code I had for printing potentially long long variables in PH/11
3042 above was not the best (it lost precision). The length of off_t variables
3043 is now inspected at build time, and an appropriate printing format (%ld
3044 or %lld) is chosen and #defined by OFF_T_FMT. We also define LONGLONG_T
3045 to be "long long int" or "long int". This is needed for the internal
3046 formatting function string_vformat().
3048 PH/16 Applied Matthew Newton's patch to exicyclog: "If log_file_path is set in
3049 the configuration file to be ":syslog", then the script "guesses" where
3050 the logs files are, rather than using the compiled in default. In our
3051 case the guess is not the same as the compiled default, so the script
3052 suddenly stopped working when I started to use syslog. The patch checks
3053 to see if log_file_path is "". If so, it attempts to read it from exim
3054 with no configuration file to get the compiled in version, before it
3055 falls back to the previous guessing code."
3057 TK/09 Added "prvs" and "prvscheck" expansion items. These help a lot with
3058 implementing BATV in an Exim configuration. See NewStuff for the gory
3061 PH/17 Applied Michael Haardt's patch for HP-UX, affecting only the os.h and
3062 Makefile that are specific to HP-UX.
3064 PH/18 If the "use_postmaster" option was set for a recipient callout together
3065 with the "random" option, the postmaster address was used as the MAIL
3066 FROM address for the random test, but not for the subsequent recipient
3067 test. It is now used for both.
3069 PH/19 Applied Michael Haardt's patch to update Sieve to RFC3028bis. "The
3070 patch removes a few documentation additions to RFC 3028, because the
3071 latest draft now contains them. It adds the new en;ascii-case comparator
3072 and a new error check for 8bit text in MIME parts. Comparator and
3073 require names are now matched exactly. I enabled the subaddress
3074 extension, but it is not well tested yet (read: it works for me)."
3076 PH/20 Added macros for time_t as for off_t (see PH/15 above) and used them to
3077 rework some of the code of TK/09 above to avoid the hardwired use of
3078 "%lld" and "long long". Replaced the call to snprintf() with a call to
3081 PH/21 Added some other messages to those in 4.51/PH/42, namely "All relevant MX
3082 records point to non-existent hosts", "retry timeout exceeded", and
3083 "retry time not reached for any host after a long failure period".
3085 PH/22 Fixed some oversights/typos causing bugs when Exim is compiled with
3086 experimental DomainKeys support:
3088 (1) The filter variables $n0-$n9 and $sn0-$sn9 were broken.
3089 (2) On an error such as an illegally used "control", the wrong name for
3090 the control was given.
3092 These problems did NOT occur unless DomainKeys support was compiled.
3094 PH/23 Added daemon_startup_retries and daemon_startup_sleep.
3096 PH/24 Added ${if match_ip condition.
3098 PH/25 Put debug statements on either side of calls to EXIM_DBOPEN() for hints
3099 databases so that it will be absolutely obvious if a crash occurs in the
3100 DB library. This is a regular occurrence (often caused by mis-matched
3103 PH/26 Insert a lot of missing (void) casts for functions such as chown(),
3104 chmod(), fcntl(), sscanf(), and other functions from stdio.h. These were
3105 picked up on a user's system that detects such things. There doesn't seem
3106 to be a gcc warning option for this - only an attribute that has to be
3107 put on the function's prototype. It seems that in Fedora Core 4 they have
3108 set this on a number of new functions. No doubt there will be more in due
3111 PH/27 If a dnslookup or manualroute router is set with verify=only, it need not
3112 specify a transport. However, if an address that was verified by such a
3113 router was the subject of a callout, Exim crashed because it tried to
3114 read the rcpt_include_affixes from the non-existent transport. Now it
3115 just assumes that the setting of that option is false. This bug was
3116 introduced by 4.51/PH/31.
3118 PH/28 Changed -d+all to exclude +memory, because that information is very
3119 rarely of interest, but it makes the output a lot bigger. People tend to
3120 do -d+all out of habit.
3122 PH/29 Removed support for the Linux-libc5 build, as it is obsolete and the
3123 code in os-type was giving problems when libc.so lives in lib64, like on
3126 PH/30 Exim's DNS code uses the original T_xxx names for DNS record times. These
3127 aren't the modern standard, and it seems that some systems' include files
3128 don't always have them. Exim was already checking for some of the newer
3129 ones like T_AAAA, and defining it itself. I've added checks for all the
3130 record types that Exim uses.
3132 PH/31 When using GnuTLS, if the parameters cache file did not exist, Exim was
3133 not automatically generating a new one, as it is supposed to. This
3134 prevented TLS from working. If the file did exist, but contained invalid
3135 data, a new version was generated, as expected. It was only the case of a
3136 non-existent file that was broken.
3138 TK/10 Domainkeys: Fix a bug in verification that caused a crash in conjunction
3139 with a change in libdomainkeys > 0.64.
3141 TK/11 Domainkeys: Change the logic how the "testing" policy flag is retrieved
3142 from DNS. If the selector record carries the flag, it now has
3143 precedence over the domain-wide flag.
3145 TK/12 Cleared some compiler warnings related to SPF, SRS and DK code.
3147 PH/32 In mua_wrapper mode, if an smtp transport configuration error (such as
3148 the use of a port name that isn't defined in /etc/services) occurred, the
3149 message was deferred as in a normal delivery, and thus remained on the
3150 spool, instead of being failed because of the mua_wrapper setting. This
3151 is now fixed, and I tidied up some of the mua_wrapper messages at the
3154 SC/08 Eximstats: whilst parsing the mainlog(s), store information about
3155 the messages in a hash of arrays rather than using individual hashes.
3156 This is a bit cleaner and results in dramatic memory savings, albeit
3157 at a slight CPU cost.
3159 SC/09 Eximstats: added the -show_rt<list> and the -show_dt<list> flags
3160 as requested by Marc Sherman.
3162 SC/10 Eximstats: added histograms for user specified patterns as requested
3165 SC/11 Eximstats: v1.43 - bugfix for pattern histograms with -h0 specified.
3167 PH/33 Patch from the Cygwin maintainer to add "b" to all occurences of
3168 fopen() in the content-scanning modules that did not already have it.
3174 TK/01 Added Yahoo DomainKeys support via libdomainkeys. See
3175 doc/experimental-spec.txt for details. (http://domainkeys.sf.net)
3177 TK/02 Fix ACL "control" statement not being available in MIME ACL.
3179 TK/03 Fix ACL "regex" condition not being available in MIME ACL.
3181 PH/01 Installed a patch from the Sieve maintainer that allows -bf to be used
3182 to test Sieve filters that use "vacation".
3184 PH/02 Installed a slightly modified version of Nikos Mavrogiannopoulos' patch
3185 that changes the way the GnuTLS parameters are stored in the cache file.
3186 The new format can be generated externally. For backward compatibility,
3187 if the data in the cache doesn't make sense, Exim assumes it has read an
3188 old-format file, and it generates new data and writes a new file. This
3189 means that you can't go back to an older release without removing the
3192 PH/03 A redirect router that has both "unseen" and "one_time" set does not
3193 work if there are any delivery delays because "one_time" forces the
3194 parent to be marked "delivered", so its unseen clone is never tried
3195 again. For this reason, Exim now forbids the simultaneous setting of
3198 PH/04 Change 4.11/85 fixed an obscure bug concerned with addresses that are
3199 redirected to themselves ("homonym" addresses). Read the long ChangeLog
3200 entry if you want to know the details. The fix, however, neglected to
3201 consider the case when local delivery batching is involved. The test for
3202 "previously delivered" was not happening when checking to see if an
3203 address could be batched with a previous (undelivered) one; under
3204 certain circumstances this could lead to multiple deliveries to the same
3207 PH/05 Renamed the macro SOCKLEN_T as EXIM_SOCKLEN_T because AIX uses SOCKLEN_T
3208 in its include files, and this causes problems building Exim.
3210 PH/06 A number of "verify =" ACL conditions have no options (e.g. verify =
3211 header_syntax) but Exim was just ignoring anything given after a slash.
3212 In particular, this caused confusion with an attempt to use "verify =
3213 reverse_host_lookup/defer_ok". An error is now given when options are
3214 supplied for verify items that do not have them. (Maybe reverse_host_
3215 lookup should have a defer_ok option, but that's a different point.)
3217 PH/07 Increase the size of the buffer for incoming SMTP commands from 512 (as
3218 defined by RFC 821) to 2048, because there were problems with some AUTH
3219 commands, and RFC 1869 says the size should be increased for extended
3220 SMTP commands that take arguments.
3222 PH/08 Added ${dlfunc dynamically loaded function for expansion (code from Tony
3225 PH/09 Previously, an attempt to use ${perl when it wasn't compiled gave an
3226 "unknown" error; now it says that the functionality isn't in the binary.
3228 PH/10 Added a nasty fudge to try to recognize and flatten LDAP passwords in
3229 an address' error message when a string expansion fails (syntax or
3230 whatever). Otherwise the password may appear in the log. Following change
3231 PH/42 below, there is no longer a chance of it appearing in a bounce
3234 PH/11 Installed exipick version 20050225.0 from John Jetmore.
3236 PH/12 If the last host in a fallback_hosts list was multihomed, only the first
3237 of its addresses was ever tried. (Bugzilla bug #2.)
3239 PH/13 If "headers_add" in a transport didn't end in a newline, Exim printed
3240 the result incorrectly in the debug output. (It correctly added a newline
3241 to what was transported.)
3243 TF/01 Added $received_time.
3245 PH/14 Modified the default configuration to add an acl_smtp_data ACL, with
3246 commented out examples of how to interface to a virus scanner and to
3247 SpamAssassin. Also added commented examples of av_scanner and
3248 spamd_address settings.
3250 PH/15 Further to TK/02 and TK/03 above, tidied up the tables of what conditions
3251 and controls are allowed in which ACLs. There were a couple of minor
3252 errors. Some of the entries in the conditions table (which is a table of
3253 where they are NOT allowed) were getting very unwieldy; rewrote them as a
3254 negation of where the condition IS allowed.
3256 PH/16 Installed updated OS/os.c-cygwin from the Cygwin maintainer.
3258 PH/17 The API for radiusclient changed at release 0.4.0. Unfortunately, the
3259 header file does not have a version number, so I've had to invent a new
3260 value for RADIUS_LIB_TYPE, namely "RADIUSCLIENTNEW" to request the new
3261 API. The code is untested by me (my Linux distribution still has 0.3.2 of
3262 radiusclient), but it was contributed by a Radius user.
3264 PH/18 Installed Lars Mainka's patch for the support of CRL collections in
3265 files or directories, for OpenSSL.
3267 PH/19 When an Exim process that is running as root has to create an Exim log
3268 file, it does so in a subprocess that runs as exim:exim so as to get the
3269 ownership right at creation (otherwise, other Exim processes might see
3270 the file with the wrong ownership). There was no test for failure of this
3271 fork() call, which would lead to the process getting stuck as it waited
3272 for a non-existent subprocess. Forks do occasionally fail when resources
3273 run out. I reviewed all the other calls to fork(); they all seem to check
3276 PH/20 When checking for unexpected SMTP input at connect time (before writing
3277 the banner), Exim was not dealing correctly with a non-positive return
3278 from the read() function. If the client had disconnected by this time,
3279 the result was a log entry for a synchronization error with an empty
3280 string after "input=" when read() returned zero. If read() returned -1
3281 (an event I could not check), uninitialized data bytes were printed.
3282 There were reports of junk text (parts of files, etc) appearing after
3285 PH/21 Added acl_not_smtp_mime to allow for MIME scanning for non-SMTP messages.
3287 PH/22 Added support for macro redefinition, and (re)definition in between
3288 driver and ACL definitions.
3290 PH/23 The cyrus_sasl authenticator was expanding server_hostname, but then
3291 forgetting to use the resulting value; it was using the unexpanded value.
3293 PH/24 The cyrus_sasl authenticator was advertising mechanisms for which it
3294 hadn't been configured. The fix is from Juergen Kreileder, who
3295 understands it better than I do:
3297 "Here's what I see happening with three configured cyrus_sasl
3298 authenticators configured (plain, login, cram-md5):
3300 On startup auth_cyrus_sasl_init() gets called for each of these.
3301 This means three calls to sasl_listmech() without a specified mech_list.
3302 => SASL tests which mechs of all available mechs actually work
3303 => three warnings about OTP not working
3304 => the returned list contains: plain, login, cram-md5, digest-md5, ...
3306 With the patch, sasl_listmech() also gets called three times. But now
3307 SASL's mech_list option is set to the server_mech specified in the the
3308 authenticator. Or in other words, the answer from sasl_listmech()
3309 gets limited to just the mech you're testing for (which is different
3311 => the return list contains just 'plain' or 'login', 'cram-md5' or
3312 nothing depending on the value of ob->server_mech.
3314 I've just tested the patch: Authentication still works fine,
3315 unavailable mechs specified in the exim configuration are still
3316 caught, and the auth.log warnings about OTP are gone."
3318 PH/25 When debugging is enabled, the contents of the command line are added
3319 to the debugging output, even when log_selector=+arguments is not
3322 PH/26 Change scripts/os-type so that when "uname -s" returns just "GNU", the
3323 answer is "GNU", and only if the return is "GNU/something" is the answer
3326 PH/27 $acl_verify_message is now set immediately after the failure of a
3327 verification in an ACL, and so is available in subsequent modifiers. In
3328 particular, the message can be preserved by coding like this:
3330 warn !verify = sender
3331 set acl_m0 = $acl_verify_message
3333 Previously, $acl_verify_message was set only while expanding "message"
3334 and "log_message" when a very denied access.
3336 PH/28 Modified OS/os.c-Linux with
3338 -#ifndef OS_LOAD_AVERAGE
3339 +#if !defined(OS_LOAD_AVERAGE) && defined(__linux__)
3341 to make Exim compile on kfreebsd-gnu. (I'm totally confused about the
3342 nomenclature these days.)
3344 PH/29 Installed patch from the Sieve maintainer that adds the options
3345 sieve_useraddress and sieve_subaddress to the redirect router.
3347 PH/30 In these circumstances:
3348 . Two addresses routed to the same list of hosts;
3349 . First host does not offer TLS;
3350 . First host accepts first address;
3351 . First host gives temporary error to second address;
3352 . Second host offers TLS and a TLS session is established;
3353 . Second host accepts second address.
3354 Exim incorrectly logged both deliveries with the TLS parameters (cipher
3355 and peerdn, if requested) that were in fact used only for the second
3358 PH/31 When doing a callout as part of verifying an address, Exim was not paying
3359 attention to any local part prefix or suffix that was matched by the
3360 router that accepted the address. It now behaves in the same way as it
3361 does for delivery: the affixes are removed from the local part unless
3362 rcpt_include_affixes is set on the transport.
3364 PH/32 Add the sender address, as F=<...>, to the log line when logging a
3365 timeout during the DATA phase of an incoming message.
3367 PH/33 Sieve envelope tests were broken for match types other than :is. I have
3368 applied a patch sanctioned by the Sieve maintainer.
3370 PH/34 Change 4.50/80 broke Exim in that it could no longer handle cases where
3371 the uid or gid is negative. A case of a negative gid caused this to be
3372 noticed. The fix allows for either to be negative.
3374 PH/35 ACL_WHERE_MIME is now declared unconditionally, to avoid too much code
3375 clutter, but the tables that are indexed by ACL_WHERE_xxx values had been
3378 PH/36 The change PH/12 above was broken. Fixed it.
3380 PH/37 Exim used to check for duplicate addresses in the middle of routing, on
3381 the grounds that routing the same address twice would always produce the
3382 same answer. This might have been true once, but it is certainly no
3383 longer true now. Routing a child address may depend on the previous
3384 routing that produced that child. Some complicated redirection strategies
3385 went wrong when messages had multiple recipients, and made Exim's
3386 behaviour dependent on the order in which the addresses were given.
3388 I have moved the duplicate checking until after the routing is complete.
3389 Exim scans the addresses that are assigned to local and remote
3390 transports, and removes any duplicates. This means that more work will be
3391 done, as duplicates will always all be routed, but duplicates are
3392 presumably rare, so I don't expect this is of any significance.
3394 For deliveries to pipes, files, and autoreplies, the duplicate checking
3395 still happens during the routing process, since they are not going to be
3398 PH/38 Installed a patch from Ian Freislich, with the agreement of Tom Kistner.
3399 It corrects a timeout issue with spamd. This is Ian's comment: "The
3400 background is that sometimes spamd either never reads data from a
3401 connection it has accepted, or it never writes response data. The exiscan
3402 spam.[ch] uses a 3600 second timeout on spamd socket reads, further, it
3403 blindly assumes that writes won't block so it may never time out."
3405 PH/39 Allow G after quota size as well as K and M.
3407 PH/40 The value set for $authenticated_id in an authenticator may not contain
3408 binary zeroes or newlines because the value is written to log lines and
3409 to spool files. There was no check on this. Now the value is run through
3410 the string_printing() function so that such characters are converted to
3411 printable escape sequences.
3413 PH/41 $message_linecount is a new variable that contains the total number of
3414 lines in the message. Compare $body_linecount, which is the count for the
3417 PH/42 Exim no longer gives details of delivery errors for specific addresses in
3418 bounce and delay warning messages, except in certain special cases, which
3421 (a) An SMTP error message from a remote host;
3422 (b) A message specified in a :fail: redirection;
3423 (c) A message specified in a "fail" command in a system filter;
3424 (d) A message specified in a FAIL return from the queryprogram router;
3425 (e) A message specified by the cannot_route_message router option.
3427 In these cases only, Exim does include the error details in bounce and
3428 warning messages. There are also a few cases where bland messages such
3429 as "unrouteable address" or "local delivery error" are given.
3431 PH/43 $value is now also set for the "else" part of a ${run expansion.
3433 PH/44 Applied patch from the Sieve maintainer: "The vacation draft is still
3434 being worked on, but at least Exim now implements the latest version to
3437 PH/45 In a pipe transport, although a timeout while waiting for the pipe
3438 process to complete was treated as a delivery failure, a timeout while
3439 writing the message to the pipe was logged, but erroneously treated as a
3440 successful delivery. Such timeouts include transport filter timeouts. For
3441 consistency with the overall process timeout, these timeouts are now
3442 treated as errors, giving rise to delivery failures by default. However,
3443 there is now a new Boolean option for the pipe transport called
3444 timeout_defer, which, if set TRUE, converts the failures into defers for
3445 both kinds of timeout. A transport filter timeout is now identified in
3448 PH/46 The "scripts/Configure-config.h" script calls "make" at one point. On
3449 systems where "make" and "gmake" are different, calling "gmake" at top
3450 level broke things. I've arranged for the value of $(MAKE) to be passed
3451 from the Makefile to this script so that it can call the same version of
3455 A note about Exim versions 4.44 and 4.50
3456 ----------------------------------------
3458 Exim 4.50 was meant to be the next release after 4.43. It contains a lot of
3459 changes of various kinds. As a consequence, a big documentation update was
3460 needed. This delayed the release for rather longer than seemed good, especially
3461 in the light of a couple of (minor) security issues. Therefore, the changes
3462 that fixed bugs were backported into 4.43, to create a 4.44 maintenance
3463 release. So 4.44 and 4.50 are in effect two different branches that both start
3466 I have left the 4.50 change log unchanged; it contains all the changes since
3467 4.43. The change log for 4.44 is below; many of its items are identical to
3468 those for 4.50. This seems to be the most sensible way to preserve the
3469 historical information.
3475 1. Minor wording change to the doc/README.SIEVE file.
3477 2. Change 4.43/35 introduced a bug: if quota_filecount was set, the
3478 computation of the current number of files was incorrect.
3480 3. Closing a stable door: arrange to panic-die if setitimer() ever fails. The
3481 bug fixed in 4.43/37 would have been diagnosed quickly if this had been in
3484 4. Give more explanation in the error message when the command for a transport
3485 filter fails to execute.
3487 5. There are several places where Exim runs a non-Exim command in a
3488 subprocess. The SIGUSR1 signal should be disabled for these processes. This
3489 was being done only for the command run by the queryprogram router. It is
3490 now done for all such subprocesses. The other cases are: ${run, transport
3491 filters, and the commands run by the lmtp and pipe transports.
3493 6. Added CONFIGURE_GROUP build-time option.
3495 7. Some older OS have a limit of 256 on the maximum number of file
3496 descriptors. Exim was using setrlimit() to set 1000 as a large value
3497 unlikely to be exceeded. Change 4.43/17 caused a lot of logging on these
3498 systems. I've change it so that if it can't get 1000, it tries for 256.
3500 8. "control=submission" was allowed, but had no effect, in a DATA ACL. This
3501 was an oversight, and furthermore, ever since the addition of extra
3502 controls (e.g. 4.43/32), the checks on when to allow different forms of
3503 "control" were broken. There should now be diagnostics for all cases when a
3504 control that does not make sense is encountered.
3506 9. Added the /retain_sender option to "control=submission".
3508 10. $recipients is now available in the predata ACL (oversight).
3510 11. Tidy the search cache before the fork to do a delivery from a message
3511 received from the command line. Otherwise the child will trigger a lookup
3512 failure and thereby defer the delivery if it tries to use (for example) a
3513 cached ldap connection that the parent has called unbind on.
3515 12. If verify=recipient was followed by verify=sender in a RCPT ACL, the value
3516 of $address_data from the recipient verification was clobbered by the
3517 sender verification.
3519 13. The value of address_data from a sender verification is now available in
3520 $sender_address_data in subsequent conditions in the ACL statement.
3522 14. Added forbid_sieve_filter and forbid_exim_filter to the redirect router.
3524 15. Added a new option "connect=<time>" to callout options, to set a different
3527 16. If FIXED_NEVER_USERS was defined, but empty, Exim was assuming the uid 0
3528 was its contents. (It was OK if the option was not defined at all.)
3530 17. A "Completed" log line is now written for messages that are removed from
3531 the spool by the -Mrm option.
3533 18. New variables $sender_verify_failure and $recipient_verify_failure contain
3534 information about exactly what failed.
3536 19. Added -dd to debug only the daemon process.
3538 20. Incorporated Michael Haardt's patch to ldap.c for improving the way it
3539 handles timeouts, both on the server side and network timeouts. Renamed the
3540 CONNECT parameter as NETTIMEOUT (but kept the old name for compatibility).
3542 21. The rare case of EHLO->STARTTLS->HELO was setting the protocol to "smtp".
3543 It is now set to "smtps".
3545 22. $host_address is now set to the target address during the checking of
3546 ignore_target_hosts.
3548 23. When checking ignore_target_hosts for an ipliteral router, no host name was
3549 being passed; this would have caused $sender_host_name to have been used if
3550 matching the list had actually called for a host name (not very likely,
3551 since this list is usually IP addresses). A host name is now passed as
3554 24. Changed the calls that set up the SIGCHLD handler in the daemon to use the
3555 code that specifies a non-restarting handler (typically sigaction() in
3556 modern systems) in an attempt to fix a rare and obscure crash bug.
3558 25. Narrowed the window for a race in the daemon that could cause it to ignore
3559 SIGCHLD signals. This is not a major problem, because they are used only to
3560 wake it up if nothing else does.
3562 26. A malformed maildirsize file could cause Exim to calculate negative values
3563 for the mailbox size or file count. Odd effects could occur as a result.
3564 The maildirsize information is now recalculated if the size or filecount
3567 27. Added HAVE_SYS_STATVFS_H to the os.h file for Linux, as it has had this
3568 support for a long time. Removed HAVE_SYS_VFS_H.
3570 28. Installed the latest version of exipick from John Jetmore.
3572 29. In an address list, if the pattern was not a regular expression, an empty
3573 subject address (from a bounce message) matched only if the pattern was an
3574 empty string. Non-empty patterns were not even tested. This was the wrong
3575 because it is perfectly reasonable to use an empty address as part of a
3576 database query. An empty address is now tested by patterns that are
3577 lookups. However, all the other forms of pattern expect the subject to
3578 contain a local part and a domain, and therefore, for them, an empty
3579 address still always fails if the pattern is not itself empty.
3581 30. Exim went into a mad DNS loop when attempting to do a callout where the
3582 host was specified on an smtp transport, and looking it up yielded more
3583 than one IP address.
3585 31. Re-factored the code for checking spool and log partition space into a
3586 function that finds that data and another that does the check. The former
3587 is then used to implement four new variables: $spool_space, $log_space,
3588 $spool_inodes, and $log_inodes.
3590 32. The RFC2047 encoding function was originally intended for short strings
3591 such as real names; it was not keeping to the 75-character limit for
3592 encoded words that the RFC imposes. It now respects the limit, and
3593 generates multiple encoded words if necessary. To be on the safe side, I
3594 have increased the buffer size for the ${rfc2047: expansion operator from
3597 33. It is now permitted to omit both strings after an "if" condition; if the
3598 condition is true, the result is "true". As before, when the second string
3599 is omitted, a false condition yields an empty string. This makes it less
3600 cumbersome to write custom ACL and router conditions.
3602 34. Failure to deliver a bounce message always caused it to be frozen, even if
3603 there was an errors_to setting on the router. The errors_to setting is now
3606 35. If an IPv6 address is given for -bh or -bhc, it is now converted to the
3607 canonical form (fully expanded) before being placed in
3608 $sender_host_address.
3610 36. The table in the code that translates DNS record types into text (T_A to
3611 "A" for instance) was missing entries for NS and CNAME. It is just possible
3612 that this could have caused confusion if both these types were looked up
3613 for the same domain, because the text type is used as part of Exim's
3614 per-process caching. But the chance of anyone hitting this buglet seems
3617 37. The dnsdb lookup has been extended in a number of ways.
3619 (1) There is a new type, "zns", which walks up the domain tree until it
3620 finds some nameserver records. It should be used with care.
3622 (2) There is a new type, "mxh", which is like "mx" except that it returns
3623 just the host names, not the priorities.
3625 (3) It is now possible to give a list of domains (or IP addresses) to be
3626 looked up. The behaviour when one of the lookups defers can be
3627 controlled by a keyword.
3629 (4) It is now possible to specify the separator character for use when
3630 multiple records are returned.
3632 38. The dnslists ACL condition has been extended: it is now possible to supply
3633 a list of IP addresses and/or domains to be looked up in a particular DNS
3636 39. Added log_selector=+queue_time_overall.
3638 40. When running the queue in the test harness, wait just a tad after forking a
3639 delivery process, to get repeatability of debugging output.
3641 41. Include certificate and key file names in error message when GnuTLS fails
3642 to set them up, because the GnuTLS error message doesn't include the name
3643 of the failing file when there is a problem reading it.
3645 42. Allow both -bf and -bF in the same test run.
3647 43. Did the same fix as 41 above for OpenSSL, which had the same infelicity.
3649 44. The "Exiscan patch" is now merged into the mainline Exim source.
3651 45. Sometimes the final signoff response after QUIT could fail to get
3652 transmitted in the non-TLS case. Testing !tls_active instead of tls_active
3653 < 0 before doing a fflush(). This bug looks as though it goes back to the
3654 introduction of TLS in release 3.20, but "sometimes" must have been rare
3655 because the tests only now provoked it.
3657 46. Reset the locale to "C" after calling embedded Perl, in case it was changed
3658 (this can affect the format of dates).
3660 47. exim_tidydb, when checking for the continued existence of a message for
3661 which it has found a message-specific retry record, was not finding
3662 messages that were in split spool directories. Consequently, it was
3663 deleting retry records that should have stayed in existence.
3665 48. Steve fixed some bugs in eximstats.
3667 49. The SPA authentication driver was not abandoning authentication and moving
3668 on to the next authenticator when an expansion was forced to fail,
3669 contradicting the general specification for all authenticators. Instead it
3670 was generating a temporary error. It now behaves as specified.
3672 50. The default ordering of permitted cipher suites for GnuTLS was pessimal
3673 (the order specifies the preference for clients). The order is now AES256,
3674 AES128, 3DES, ARCFOUR128.
3676 51. Small patch to Sieve code - explicitly set From: when generating an
3679 52. Exim crashed if a remote delivery caused a very long error message to be
3680 recorded - for instance if somebody sent an entire SpamAssassin report back
3681 as a large number of 550 error lines. This bug was coincidentally fixed by
3682 increasing the size of one of Exim's internal buffers (big_buffer) that
3683 happened as part of the Exiscan merge. However, to be on the safe side, I
3684 have made the code more robust (and fixed the comments that describe what
3687 53. Now that there can be additional text after "Completed" in log lines (if
3688 the queue_time_overall log selector is set), a one-byte patch to exigrep
3689 was needed to allow it to recognize "Completed" as not the last thing in
3692 54. The LDAP lookup was not handling a return of LDAP_RES_SEARCH_REFERENCE. A
3693 patch that reportedly fixes this has been added. I am not expert enough to
3694 create a test for it. This is what the patch creator wrote:
3696 "I found a little strange behaviour of ldap code when working with
3697 Windows 2003 AD Domain, where users was placed in more than one
3698 Organization Units. When I tried to give exim partial DN, the exit code
3699 of ldap_search was unknown to exim because of LDAP_RES_SEARCH_REFERENCE.
3700 But simultaneously result of request was absolutely normal ldap result,
3701 so I produce this patch..."
3703 Later: it seems that not all versions of LDAP support LDAP_RES_SEARCH_
3704 REFERENCE, so I have modified the code to exclude the patch when that macro
3707 55. Some experimental protocols are using DNS PTR records for new purposes. The
3708 keys for these records are domain names, not reversed IP addresses. The
3709 dnsdb PTR lookup now tests whether its key is an IP address. If not, it
3710 leaves it alone. Component reversal etc. now happens only for IP addresses.
3713 56. Improve error message when ldap_search() fails in OpenLDAP or Solaris LDAP.
3715 57. Double the size of the debug message buffer (to 2048) so that more of very
3716 long debug lines gets shown.
3718 58. The exicyclog utility now does better if the number of log files to keep
3719 exceeds 99. In this case, it numbers them 001, 002 ... instead of 01, 02...
3721 59. Two changes related to the smtp_active_hostname option:
3723 (1) $smtp_active_hostname is now available as a variable.
3724 (2) The default for smtp_banner uses $smtp_active_hostname instead
3725 of $primary_hostname.
3727 60. The host_aton() function is supposed to be passed a string that is known
3728 to be a valid IP address. However, in the case of IPv6 addresses, it was
3729 not checking this. This is a hostage to fortune. Exim now panics and dies
3730 if the condition is not met. A case was found where this could be provoked
3731 from a dnsdb PTR lookup with an IPv6 address that had more than 8
3732 components; fortuitously, this particular loophole had already been fixed
3733 by change 4.50/55 above.
3735 If there are any other similar loopholes, the new check in host_aton()
3736 itself should stop them being exploited. The report I received stated that
3737 data on the command line could provoke the exploit when Exim was running as
3738 exim, but did not say which command line option was involved. All I could
3739 find was the use of -be with a bad dnsdb PTR lookup, and in that case it is
3740 running as the user.
3743 61. There was a buffer overflow vulnerability in the SPA authentication code
3744 (which came originally from the Samba project). I have added a test to the
3745 spa_base64_to_bits() function which I hope fixes it.
3748 62. Configuration update for GNU/Hurd and variations. Updated Makefile-GNU and
3749 os.h-GNU, and added configuration files for GNUkFreeBSD and GNUkNetBSD.
3751 63. The daemon start-up calls getloadavg() while still root for those OS that
3752 need the first call to be done as root, but it missed one case: when
3753 deliver_queue_load_max is set with deliver_drop_privilege. This is
3754 necessary for the benefit of the queue runner, because there is no re-exec
3755 when deliver_drop_privilege is set.
3757 64. A call to exiwhat cut short delays set up by "delay" modifiers in ACLs.
3758 This has been fixed.
3760 65. Caching of lookup data for "hosts =" ACL conditions, when a named host list
3761 was in use, was not putting the data itself into the right store pool;
3762 consequently, it could be overwritten for a subsequent message in the same
3763 SMTP connection. (Fix 4.40/11 dealt with the non-cache case, but overlooked
3766 66. Added hosts_max_try_hardlimit to the smtp transport, default 50.
3768 67. The string_is_ip_address() function returns 0, 4, or 6, for "no an IP
3769 address", "IPv4 address", and "IPv6 address", respectively. Some calls of
3770 the function were treating the return as a boolean value, which happened to
3771 work because 0=false and not-0=true, but is not correct code.
3773 68. The host_aton() function was not handling scoped IPv6 addresses (those
3774 with, for example, "%eth0" on the end) correctly.
3776 69. Fixed some compiler warnings in acl.c for the bitmaps specified with
3777 negated items (that is, ~something) in unsigned ints. Some compilers
3778 apparently mutter when there is no cast.
3780 70. If an address verification called from an ACL failed, and did not produce a
3781 user-specific message (i.e. there was only a "system" message), nothing was
3782 put in $acl_verify_message. In this situation, it now puts the system
3785 71. Change 4.23/11 added synchronization checking at the start of an SMTP
3786 session; change 4.31/43 added the unwanted input to the log line - except
3787 that it did not do this in the start of session case. It now does.
3789 72. After a timeout in a callout SMTP session, Exim still sent a QUIT command.
3790 This is wrong and can cause the other end to generate a synchronization
3791 error if it is another Exim or anything else that does the synchronization
3792 check. A QUIT command is no longer sent after a timeout.
3794 73. $host_lookup_deferred has been added, to make it easier to detect DEFERs
3795 during host lookups.
3797 74. The defer_ok option of callout verification was not working if it was used
3798 when verifying addresses in header lines, that is, for this case:
3800 verify = header_sender/callout=defer_ok
3802 75. A backgrounded daemon closed stdin/stdout/stderr on entry; this meant that
3803 those file descriptors could be used for SMTP connections. If anything
3804 wrote to stderr (the example that came up was "warn" in embedded Perl), it
3805 could be sent to the SMTP client, causing chaos. The daemon now opens
3806 stdin, stdout, and stderr to /dev/null when it puts itself into the
3809 76. Arrange for output from Perl's "warn" command to be written to Exim's main
3810 log by default. The user can override this with suitable Perl magic.
3812 77. The use of log_message on a "discard" ACL verb, which is supposed to add to
3813 the log message when discard triggers, was not working for the DATA ACL or
3814 for the non-SMTP ACL.
3816 78. Error message wording change in sieve.c.
3818 79. If smtp_accept_max_per_host was set, the number of connections could be
3819 restricted to fewer than expected, because the daemon was trying to set up
3820 a new connection before checking whether the processes handling previous
3821 connections had finished. The check for completed processes is now done
3822 earlier. On busy systems, this bug wouldn't be noticed because something
3823 else would have woken the daemon, and it would have reaped the completed
3826 80. If a message was submitted locally by a user whose login name contained one
3827 or more spaces (ugh!), the spool file that Exim wrote was not re-readable.
3828 It caused a spool format error. I have fixed the spool reading code. A
3829 related problem was that the "from" clause in the Received: line became
3830 illegal because of the space(s). It is now covered by ${quote_local_part.
3832 81. Included the latest eximstats from Steve (adds average sizes to HTML Top
3835 82. Updated OS/Makefile-AIX as per message from Mike Meredith.
3837 83. Patch from Sieve maintainer to fix unterminated string problem in
3838 "vacation" handling.
3840 84. Some minor changes to the Linux configuration files to help with other
3841 OS variants using glibc.
3843 85. One more patch for Sieve to update vacation handling to latest spec.
3846 ----------------------------------------------------
3847 See the note above about the 4.44 and 4.50 releases.
3848 ----------------------------------------------------
3854 1. Change 4.43/35 introduced a bug that caused file counts to be
3855 incorrectly computed when quota_filecount was set in an appendfile
3858 2. Closing a stable door: arrange to panic-die if setitimer() ever fails. The
3859 bug fixed in 4.43/37 would have been diagnosed quickly if this had been in
3862 3. Give more explanation in the error message when the command for a transport
3863 filter fails to execute.
3865 4. There are several places where Exim runs a non-Exim command in a
3866 subprocess. The SIGUSR1 signal should be disabled for these processes. This
3867 was being done only for the command run by the queryprogram router. It is
3868 now done for all such subprocesses. The other cases are: ${run, transport
3869 filters, and the commands run by the lmtp and pipe transports.
3871 5. Some older OS have a limit of 256 on the maximum number of file
3872 descriptors. Exim was using setrlimit() to set 1000 as a large value
3873 unlikely to be exceeded. Change 4.43/17 caused a lot of logging on these
3874 systems. I've change it so that if it can't get 1000, it tries for 256.
3876 6. "control=submission" was allowed, but had no effect, in a DATA ACL. This
3877 was an oversight, and furthermore, ever since the addition of extra
3878 controls (e.g. 4.43/32), the checks on when to allow different forms of
3879 "control" were broken. There should now be diagnostics for all cases when a
3880 control that does not make sense is encountered.
3882 7. $recipients is now available in the predata ACL (oversight).
3884 8. Tidy the search cache before the fork to do a delivery from a message
3885 received from the command line. Otherwise the child will trigger a lookup
3886 failure and thereby defer the delivery if it tries to use (for example) a
3887 cached ldap connection that the parent has called unbind on.
3889 9. If verify=recipient was followed by verify=sender in a RCPT ACL, the value
3890 of $address_data from the recipient verification was clobbered by the
3891 sender verification.
3893 10. If FIXED_NEVER_USERS was defined, but empty, Exim was assuming the uid 0
3894 was its contents. (It was OK if the option was not defined at all.)
3896 11. A "Completed" log line is now written for messages that are removed from
3897 the spool by the -Mrm option.
3899 12. $host_address is now set to the target address during the checking of
3900 ignore_target_hosts.
3902 13. When checking ignore_target_hosts for an ipliteral router, no host name was
3903 being passed; this would have caused $sender_host_name to have been used if
3904 matching the list had actually called for a host name (not very likely,
3905 since this list is usually IP addresses). A host name is now passed as
3908 14. Changed the calls that set up the SIGCHLD handler in the daemon to use the
3909 code that specifies a non-restarting handler (typically sigaction() in
3910 modern systems) in an attempt to fix a rare and obscure crash bug.
3912 15. Narrowed the window for a race in the daemon that could cause it to ignore
3913 SIGCHLD signals. This is not a major problem, because they are used only to
3914 wake it up if nothing else does.
3916 16. A malformed maildirsize file could cause Exim to calculate negative values
3917 for the mailbox size or file count. Odd effects could occur as a result.
3918 The maildirsize information is now recalculated if the size or filecount
3921 17. Added HAVE_SYS_STATVFS_H to the os.h file for Linux, as it has had this
3922 support for a long time. Removed HAVE_SYS_VFS_H.
3924 18. Updated exipick to current release from John Jetmore.
3926 19. Allow an empty sender to be matched against a lookup in an address list.
3927 Previously the only cases considered were a regular expression, or an
3930 20. Exim went into a mad DNS lookup loop when doing a callout where the
3931 host was specified on the transport, if the DNS lookup yielded more than
3934 21. The RFC2047 encoding function was originally intended for short strings
3935 such as real names; it was not keeping to the 75-character limit for
3936 encoded words that the RFC imposes. It now respects the limit, and
3937 generates multiple encoded words if necessary. To be on the safe side, I
3938 have increased the buffer size for the ${rfc2047: expansion operator from
3941 22. Failure to deliver a bounce message always caused it to be frozen, even if
3942 there was an errors_to setting on the router. The errors_to setting is now
3945 23. If an IPv6 address is given for -bh or -bhc, it is now converted to the
3946 canonical form (fully expanded) before being placed in
3947 $sender_host_address.
3949 24. Updated eximstats to version 1.33
3951 25. Include certificate and key file names in error message when GnuTLS fails
3952 to set them up, because the GnuTLS error message doesn't include the name
3953 of the failing file when there is a problem reading it.
3955 26. Expand error message when OpenSSL has problems setting up cert/key files.
3958 27. Reset the locale to "C" after calling embedded Perl, in case it was changed
3959 (this can affect the format of dates).
3961 28. exim_tidydb, when checking for the continued existence of a message for
3962 which it has found a message-specific retry record, was not finding
3963 messages that were in split spool directories. Consequently, it was
3964 deleting retry records that should have stayed in existence.
3966 29. eximstats updated to version 1.35
3967 1.34 - allow eximstats to parse syslog lines as well as mainlog lines
3968 1.35 - bugfix such that pie charts by volume are generated correctly
3970 30. The SPA authentication driver was not abandoning authentication and moving
3971 on to the next authenticator when an expansion was forced to fail,
3972 contradicting the general specification for all authenticators. Instead it
3973 was generating a temporary error. It now behaves as specified.
3975 31. The default ordering of permitted cipher suites for GnuTLS was pessimal
3976 (the order specifies the preference for clients). The order is now AES256,
3977 AES128, 3DES, ARCFOUR128.
3979 31. Small patch to Sieve code - explicitly set From: when generating an
3982 32. Exim crashed if a remote delivery caused a very long error message to be
3983 recorded - for instance if somebody sent an entire SpamAssassin report back
3984 as a large number of 550 error lines. This bug was coincidentally fixed by
3985 increasing the size of one of Exim's internal buffers (big_buffer) that
3986 happened as part of the Exiscan merge. However, to be on the safe side, I
3987 have made the code more robust (and fixed the comments that describe what
3990 33. Some experimental protocols are using DNS PTR records for new purposes. The
3991 keys for these records are domain names, not reversed IP addresses. The
3992 dnsdb PTR lookup now tests whether its key is an IP address. If not, it
3993 leaves it alone. Component reversal etc. now happens only for IP addresses.
3996 34. The host_aton() function is supposed to be passed a string that is known
3997 to be a valid IP address. However, in the case of IPv6 addresses, it was
3998 not checking this. This is a hostage to fortune. Exim now panics and dies
3999 if the condition is not met. A case was found where this could be provoked
4000 from a dnsdb PTR lookup with an IPv6 address that had more than 8
4001 components; fortuitously, this particular loophole had already been fixed
4002 by change 4.50/55 or 4.44/33 above.
4004 If there are any other similar loopholes, the new check in host_aton()
4005 itself should stop them being exploited. The report I received stated that
4006 data on the command line could provoke the exploit when Exim was running as
4007 exim, but did not say which command line option was involved. All I could
4008 find was the use of -be with a bad dnsdb PTR lookup, and in that case it is
4009 running as the user.
4012 35. There was a buffer overflow vulnerability in the SPA authentication code
4013 (which came originally from the Samba project). I have added a test to the
4014 spa_base64_to_bits() function which I hope fixes it.
4017 36. The daemon start-up calls getloadavg() while still root for those OS that
4018 need the first call to be done as root, but it missed one case: when
4019 deliver_queue_load_max is set with deliver_drop_privilege. This is
4020 necessary for the benefit of the queue runner, because there is no re-exec
4021 when deliver_drop_privilege is set.
4023 37. Caching of lookup data for "hosts =" ACL conditions, when a named host list
4024 was in use, was not putting the data itself into the right store pool;
4025 consequently, it could be overwritten for a subsequent message in the same
4026 SMTP connection. (Fix 4.40/11 dealt with the non-cache case, but overlooked
4029 38. Sometimes the final signoff response after QUIT could fail to get
4030 transmitted in the non-TLS case. Testing !tls_active instead of tls_active
4031 < 0 before doing a fflush(). This bug looks as though it goes back to the
4032 introduction of TLS in release 3.20, but "sometimes" must have been rare
4033 because the tests only now provoked it.
4039 1. Fixed a longstanding but relatively impotent bug: a long time ago, before
4040 PIPELINING, the function smtp_write_command() used to return TRUE or FALSE.
4041 Now it returns an integer. A number of calls were still expecting a T/F
4042 return. Fortuitously, in all cases, the tests worked in OK situations,
4043 which is the norm. However, things would have gone wrong on any write
4044 failures on the smtp file descriptor. This function is used when sending
4045 messages over SMTP and also when doing verify callouts.
4047 2. When Exim is called to do synchronous delivery of a locally submitted
4048 message (the -odf or -odi options), it no longer closes stderr before doing
4051 3. Implemented the mua_wrapper option.
4053 4. Implemented mx_fail_domains and srv_fail_domains for the dnslookup router.
4055 5. Implemented the functions header_remove(), header_testname(),
4056 header_add_at_position(), and receive_remove_recipient(), and exported them
4059 6. If an ACL "warn" statement specified the addition of headers, Exim already
4060 inserted X-ACL-Warn: at the start if there was no header name. However, it
4061 was not making this test for the second and subsequent header lines if
4062 there were newlines in the string. This meant that an invalid header could
4063 be inserted if Exim was badly configured.
4065 7. Allow an ACL "warn" statement to add header lines at the start or after all
4066 the Received: headers, as well as at the end.
4068 8. Added the rcpt_4xx retry error code.
4070 9. Added postmaster_mailfrom=xxx to callout verification option.
4072 10. Added mailfrom=xxxx to the callout verification option, for verify=
4075 11. ${substr_1_:xxxx} and ${substr__3:xxxx} are now diagnosed as syntax errors
4076 (they previously behaved as ${substr_1_0:xxxx} and ${substr:_0_3:xxxx}).
4078 12. Inserted some casts to stop certain compilers warning when using pointer
4079 differences as field lengths or precisions in printf-type calls (mostly
4080 affecting debugging statements).
4082 13. Added optional readline() support for -be (dynamically loaded).
4084 14. Obscure bug fix: if a message error (e.g. 4xx to MAIL) happened within the
4085 same clock tick as a message's arrival, so that its received time was the
4086 same as the "first fail" time on the retry record, and that message
4087 remained on the queue past the ultimate address timeout, every queue runner
4088 would try a delivery (because it was past the ultimate address timeout) but
4089 after another failure, the ultimate address timeout, which should have then
4090 bounced the address, did not kick in. This was a "< instead of <=" error;
4091 in most cases the first failure would have been in the next clock tick
4092 after the received time, and all would be well.
4094 15. The special items beginning with @ in domain lists (e.g. @mx_any) were not
4095 being recognized when the domain list was tested by the match_domain
4096 condition in an expansion string.
4098 16. Added the ${str2b64: operator.
4100 17. Exim was always calling setrlimit() to set a large limit for the number of
4101 processes, without checking whether the existing limit was already
4102 adequate. (It did check for the limit on file descriptors.) Furthermore,
4103 errors from getrlimit() and setrlimit() were being ignored. Now they are
4104 logged to the main and panic logs, but Exim does carry on, to try to do its
4105 job under whatever limits there are.
4107 18. Imported PCRE 5.0.
4109 19. Trivial typo in log message " temporarily refused connection" (the leading
4112 20. If the log selector return_path_on_delivery was set and an address was
4113 redirected to /dev/null, the delivery process crashed because it assumed
4114 that a return path would always be set for a "successful" delivery. In this
4115 case, the whole delivery is bypassed as an optimization, and therefore no
4118 21. Internal re-arrangement: the function for sending a challenge and reading
4119 a response while authentication was assuming a zero-terminated challenge
4120 string. It's now changed to take a pointer and a length, to allow for
4121 binary data in such strings.
4123 22. Added the cyrus_sasl authenticator (code supplied by MBM).
4125 23. Exim was not respecting finduser_retries when seeking the login of the
4126 uid under which it was called; it was always trying 10 times. (The default
4127 setting of finduser_retries is zero.) Also, it was sleeping after the final
4128 failure, which is pointless.
4130 24. Implemented tls_on_connect_ports.
4132 25. Implemented acl_smtp_predata.
4134 26. If the domain in control=submission is set empty, Exim assumes that the
4135 authenticated id is a complete email address when it generates From: or
4136 Sender: header lines.
4138 27. Added "#define SOCKLEN_T int" to OS/os.h-SCO and OS/os.h-SCO_SV. Also added
4139 definitions to OS/Makefile-SCO and OS/Makefile-SCO_SV that put basename,
4140 chown and chgrp in /bin and hostname in /usr/bin.
4142 28. Exim was keeping the "process log" file open after each use, just as it
4143 does for the main log. This opens the possibility of it remaining open for
4144 long periods when the USR1 signal hits a daemon. Occasional processlog
4145 errors were reported, that could have been caused by this. Anyway, it seems
4146 much more sensible not to leave this file open at all, so that is what now
4149 29. The long-running daemon process does not normally write to the log once it
4150 has entered its main loop, and it closes the log before doing so. This is
4151 so that log files can straightforwardly be renamed and moved. However,
4152 there are a couple of unusual error situations where the daemon does write
4153 log entries, and I had neglected to close the log afterwards.
4155 30. The text of an SMTP error response that was received during a remote
4156 delivery was being truncated at 512 bytes. This is too short for some of
4157 the long messages that one sometimes sees. I've increased the limit to
4160 31. It is now possible to make retry rules that apply only when a message has a
4161 specific sender, in particular, an empty sender.
4163 32. Added "control = enforce_sync" and "control = no_enforce_sync". This makes
4164 it possible to be selective about when SMTP synchronization is enforced.
4166 33. Added "control = caseful_local_part" and "control = "caselower_local_part".
4168 32. Implemented hosts_connection_nolog.
4170 33. Added an ACL for QUIT.
4172 34. Setting "delay_warning=" to disable warnings was not working; it gave a
4175 35. Added mailbox_size and mailbox_filecount to appendfile.
4177 36. Added control = no_multiline_responses to ACLs.
4179 37. There was a bug in the logic of the code that waits for the clock to tick
4180 in the case where the clock went backwards by a substantial amount such
4181 that the microsecond fraction of "now" was more than the microsecond
4182 fraction of "then" (but the whole seconds number was less).
4184 38. Added support for the libradius Radius client library this is found on
4185 FreeBSD (previously only the radiusclient library was supported).
4191 1. When certain lookups returned multiple values in the form name=value, the
4192 quoting of the values was not always being done properly. Specifically:
4193 (a) If the value started with a double quote, but contained no whitespace,
4195 (b) If the value contained whitespace other than a space character (i.e.
4196 tabs or newlines or carriage returns) it was not quoted.
4197 This fix has been applied to the mysql and pgsql lookups by writing a
4198 separate quoting function and calling it from the lookup code. The fix
4199 should probably also be applied to nisplus, ibase and oracle lookups, but
4200 since I cannot test any of those, I have not disturbed their existing code.
4202 2. A hit in the callout cache for a specific address caused a log line with no
4203 reason for rejecting RCPT. Now it says "Previous (cached) callout
4204 verification failure".
4206 3. There was an off-by-one bug in the queryprogram router. An over-long
4207 return line was truncated at 256 instead of 255 characters, thereby
4208 overflowing its buffer with the terminating zero. As well as fixing this, I
4209 have increased the buffer size to 1024 (and made a note to document this).
4211 4. If an interrupt, such as the USR1 signal that is send by exiwhat, arrives
4212 when Exim is waiting for an SMTP response from a remote server, Exim
4213 restarts its select() call on the socket, thereby resetting its timeout.
4214 This is not a problem when such interrupts are rare. Somebody set up a cron
4215 job to run exiwhat every 2 minutes, which is less than the normal select()
4216 timeout (5 or 10 minutes). This meant that the select() timeout never
4217 kicked in because it was always reset. I have fixed this by comparing the
4218 time when an interrupt arrives with the time at the start of the first call
4219 to select(). If more time than the timeout has elapsed, the interrupt is
4220 treated as a timeout.
4222 5. Some internal re-factoring in preparation for the addition of Sieve
4223 extensions (by MH). In particular, the "personal" test is moved to a
4224 separate function, and given an option for scanning Cc: and Bcc: (which is
4225 not set for Exim filters).
4227 6. When Exim created an email address using the login of the caller as the
4228 local part (e.g. when creating a From: or Sender: header line), it was not
4229 quoting the local part when it contained special characters such as @.
4231 7. Installed new OpenBSD configuration files.
4233 8. Reworded some messages for syntax errors in "and" and "or" conditions to
4234 try to make them clearer.
4236 9. Callout options, other than the timeout value, were being ignored when
4237 verifying sender addresses in header lines. For example, when using
4239 verify = header_sender/callout=no_cache
4241 the cache was (incorrectly) being used.
4243 10. Added a missing instance of ${EXE} to the exim_install script; this affects
4244 only the Cygwin environment.
4246 11. When return_path_on_delivery was set as a log selector, if different remote
4247 addresses in the same message used different return paths and parallel
4248 remote delivery occurred, the wrong values would sometimes be logged.
4249 (Whenever a remote delivery process finished, the return path value from
4250 the most recently started remote delivery process was logged.)
4252 12. RFC 3848 specifies standard names for the "with" phrase in Received: header
4253 lines when AUTH and/or TLS are in use. This is the "received protocol"
4254 field. Exim used to use "asmtp" for authenticated SMTP, without any
4255 indication (in the protocol name) for TLS use. Now it follows the RFC and
4256 uses "esmtpa" if the connection is authenticated, "esmtps" if it is
4257 encrypted, and "esmtpsa" if it is both encrypted and authenticated. These
4258 names appear in log lines as well as in Received: header lines.
4260 13. Installed MH's patches for Sieve to add the "copy" and "vacation"
4261 extensions, and comparison tests, and to fix some bugs.
4263 14. Changes to the "personal" filter test:
4265 (1) The test was buggy in that it was just doing the equivalent of
4266 "contains" tests on header lines. For example, if a user's address was
4267 anne@some.where, the "personal" test would incorrectly be true for
4269 To: susanne@some.where
4271 This test is now done by extracting each address from the header in turn,
4272 and checking the entire address. Other tests that are part of "personal"
4273 are now done using regular expressions (for example, to check local parts
4274 of addresses in From: header lines).
4276 (2) The list of non-personal local parts in From: addresses has been
4277 extended to include "listserv", "majordomo", "*-request", and "owner-*",
4278 taken from the Sieve specification recommendations.
4280 (3) If the message contains any header line starting with "List-" it is
4281 treated as non-personal.
4283 (4) The test for "circular" in the Subject: header line has been removed
4284 because it now seems ill-conceived.
4286 15. Minor typos in src/EDITME comments corrected.
4288 16. Installed latest exipick from John Jetmore.
4290 17. If headers_add on a router specified a text string that was too long for
4291 string_sprintf() - that is, longer than 8192 bytes - Exim panicked. The use
4292 of string_sprintf() is now avoided.
4294 18. $message_body_size was not set (it was always zero) when running the DATA
4295 ACL and the local_scan() function.
4297 19. For the "mail" command in an Exim filter, no default was being set for
4298 the once_repeat time, causing a random time value to be used if "once" was
4299 specified. (If the value happened to be <= 0, no repeat happened.) The
4300 default is now 0s, meaning "never repeat". The "vacation" command was OK
4301 (its default is 7d). It's somewhat surprising nobody ever noticed this bug
4302 (I found it when inspecting the code).
4304 20. There is now an overall timeout for performing a callout verification. It
4305 defaults to 4 times the callout timeout, which applies to individual SMTP
4306 commands during the callout. The overall timeout applies when there is more
4307 than one host that can be tried. The timeout is checked before trying the
4308 next host. This prevents very long delays if there are a large number of
4309 hosts and all are timing out (e.g. when the network connections are timing
4310 out). The value of the overall timeout can be changed by specifying an
4311 additional sub-option for "callout", called "maxwait". For example:
4313 verify = sender/callout=5s,maxwait=20s
4315 21. Add O_APPEND to the open() call for maildirsize files (Exim already seeks
4316 to the end before writing, but this should make it even safer).
4318 22. Exim was forgetting that it had advertised PIPELINING for the second and
4319 subsequent messages on an SMTP connection. It was also not resetting its
4320 memory on STARTTLS and an internal HELO.
4322 23. When Exim logs an SMTP synchronization error within a session, it now
4323 records whether PIPELINING has been advertised or not.
4325 24. Added 3 instances of "(long int)" casts to time_t variables that were being
4326 formatted using %ld, because on OpenBSD (and perhaps others), time_t is int
4327 rather than long int.
4329 25. Installed the latest Cygwin configuration files from the Cygwin maintainer.
4331 26. Added the never_mail option to autoreply.
4337 1. A reorganization of the code in order to implement 4.40/8 caused a daemon
4338 crash if the getsockname() call failed; this can happen if a connection is
4339 closed very soon after it is established. The problem was simply in the
4340 order in which certain operations were done, causing Exim to try to write
4341 to the SMTP stream before it had set up the file descriptor. The bug has
4342 been fixed by making things happen in the correct order.
4348 1. If "drop" was used in a DATA ACL, the SMTP output buffer was not flushed
4349 before the connection was closed, thus losing the rejection response.
4351 2. Commented out the definition of SOCKLEN_T in os.h-SunOS5. It is needed for
4352 some early Solaris releases, but causes trouble in current releases where
4353 socklen_t is defined.
4355 3. When std{in,out,err} are closed, re-open them to /dev/null so that they
4358 4. Minor refactoring of os.c-Linux to avoid compiler warning when IPv6 is not
4361 5. Refactoring in expand.c to improve memory usage. Pre-allocate a block so
4362 that releasing the top of it at the end releases what was used for sub-
4363 expansions (unless the block got too big). However, discard this block if
4364 the first thing is a variable or header, so that we can use its block when
4365 it is dynamic (useful for very large $message_headers, for example).
4367 6. Lookups now cache *every* query, not just the most recent. A new, separate
4368 store pool is used for this. It can be recovered when all lookup caches are
4369 flushed. Lookups now release memory at the end of their result strings.
4370 This has involved some general refactoring of the lookup sources.
4372 7. Some code has been added to the store_xxx() functions to reduce the amount
4373 of flapping under certain conditions.
4375 8. log_incoming_interface used to affect only the <= reception log lines. Now
4376 it causes the local interface and port to be added to several more SMTP log
4377 lines, for example "SMTP connection from", and rejection lines.
4379 9. The Sieve author supplied some patches for the doc/README.SIEVE file.
4381 10. Added a conditional definition of _BSD_SOCKLEN_T to os.h-Darwin.
4383 11. If $host_data was set by virtue of a hosts lookup in an ACL, its value
4384 could be overwritten at the end of the current message (or the start of a
4385 new message if it was set in a HELO ACL). The value is now preserved for
4386 the duration of the SMTP connection.
4388 12. If a transport had a headers_rewrite setting, and a matching header line
4389 contained an unqualified address, that address was qualified, even if it
4390 did not match any rewriting rules. The underlying bug was that the values
4391 of the flags that permit the existence of unqualified sender and recipient
4392 addresses in header lines (set by {sender,recipient}_unqualified_hosts for
4393 non-local messages, and by -bnq for local messages) were not being
4394 preserved with the message after it was received.
4396 13. When Exim was logging an SMTP synchronization error, it could sometimes log
4397 "next input=" as part of the text comprising the host identity instead of
4398 the correct text. The code was using the same buffer for two different
4399 strings. However, depending on which order the printing function evaluated
4400 its arguments, the bug did not always show up. Under Linux, for example, my
4401 test suite worked just fine.
4403 14. Exigrep contained a use of Perl's "our" scoping after change 4.31/70. This
4404 doesn't work with some older versions of Perl. It has been changed to "my",
4405 which in any case is probably the better facility to use.
4407 15. A really picky compiler found some instances of statements for creating
4408 error messages that either had too many or two few arguments for the format
4411 16. The size of the buffer for calls to the DNS resolver has been increased
4412 from 1024 to 2048. A larger buffer is needed when performing PTR lookups
4413 for addresses that have a lot of PTR records. This alleviates a problem; it
4414 does not fully solve it.
4416 17. A dnsdb lookup for PTR records that receives more data than will fit in the
4417 buffer now truncates the list and logs the incident, which is the same
4418 action as happens when Exim is looking up a host name and its aliases.
4419 Previously in this situation something unpredictable would happen;
4420 sometimes it was "internal error: store_reset failed".
4422 18. If a server dropped the connection unexpectedly when an Exim client was
4423 using GnuTLS and trying to read a response, the client delivery process
4424 crashed while trying to generate an error log message.
4426 19. If a "warn" verb in an ACL added multiple headers to a message in a single
4427 string, for example:
4429 warn message = H1: something\nH2: something
4431 the text was added as a single header line from Exim's point of view
4432 though it ended up OK in the delivered message. However, searching for the
4433 second and subsequent header lines using $h_h2: did not work. This has been
4434 fixed. Similarly, if a system filter added multiple headers in this way,
4435 the routers could not see them.
4437 20. Expanded the error message when iplsearch is called with an invalid key to
4438 suggest using net-iplsearch in a host list.
4440 21. When running tests using -bh, any delays imposed by "delay" modifiers in
4441 ACLs are no longer actually imposed (and a message to that effect is
4444 22. If a "gecos" field in a passwd entry contained escaped characters, in
4445 particular, if it contained a \" sequence, Exim got it wrong when building
4446 a From: or a Sender: header from that name. A second bug also caused
4447 incorrect handling when an unquoted " was present following a character
4448 that needed quoting.
4450 23. "{crypt}" as a password encryption mechanism for a "crypteq" expansion item
4451 was not being matched caselessly.
4453 24. Arranged for all hyphens in the exim.8 source to be escaped with
4456 25. Change 16 of 4.32, which reversed 71 or 4.31 didn't quite do the job
4457 properly. Recipient callout cache records were still being keyed to include
4458 the sender, even when use_sender was set false. This led to far more
4459 callouts that were necessary. The sender is no longer included in the key
4460 when use_sender is false.
4462 26. Added "control = submission" modifier to ACLs.
4464 27. Added the ${base62d: operator to decode base 62 numbers.
4466 28. dnsdb lookups can now access SRV records.
4468 29. CONFIGURE_OWNER can be set at build time to define an alternative owner for
4469 the configuration file.
4471 30. The debug message "delivering xxxxxx-xxxxxx-xx" is now output in verbose
4472 (-v) mode. This makes the output for a verbose queue run more intelligible.
4474 31. Added a use_postmaster feature to recipient callouts.
4476 32. Added the $body_zerocount variable, containing the number of binary zero
4477 bytes in the message body.
4479 33. The time of last modification of the "new" subdirectory is now used as the
4480 "mailbox time last read" when there is a quota error for a maildir
4483 34. Added string comparison operators lt, lti, le, lei, gt, gti, ge, gei.
4485 35. Added +ignore_unknown as a special item in host lists.
4487 36. Code for decoding IPv6 addresses in host lists is now included, even if
4488 IPv6 support is not being compiled. This fixes a bug in which an IPv6
4489 address was recognized as an IP address, but was then not correctly decoded
4490 into binary, causing unexpected and incorrect effects when compared with
4497 1. Very minor rewording of debugging text in manualroute to say "list of
4498 hosts" instead of "hostlist".
4500 2. If verify=header_syntax was set, and a header line with an unqualified
4501 address (no domain) and a large number of spaces between the end of the
4502 name and the colon was received, the reception process suffered a buffer
4503 overflow, and (when I tested it) crashed. This was caused by some obsolete
4504 code that should have been removed. The fix is to remove it!
4506 3. When running in the test harness, delay a bit after writing a bounce
4507 message to get a bit more predictability in the log output.
4509 4. Added a call to search_tidyup() just before forking a reception process. In
4510 theory, someone could use a lookup in the expansion of smtp_accept_max_
4511 per_host which, without the tidyup, could leave open a database connection.
4513 5. Added the variables $recipient_data and $sender_data which get set from a
4514 lookup success in an ACL "recipients" or "senders" condition, or a router
4515 "senders" option, similar to $domain_data and $local_part_data.
4517 6. Moved the writing of debug_print from before to after the "senders" test
4520 7. Change 4.31/66 (moving the time when the Received: is generated) caused
4521 problems for message scanning, either using a data ACL, or using
4522 local_scan() because the Received: header was not generated till after they
4523 were called (in order to set the time as the time of reception completion).
4524 I have revised the way this works. The header is now generated after the
4525 body is received, but before the ACL or local_scan() are called. After they
4526 are run, the timestamp in the header is updated.
4532 1. Change 4.24/6 introduced a bug because the SIGALRM handler was disabled
4533 before starting a queue runner without re-exec. This happened only when
4534 deliver_drop_privilege was set or when the Exim user was set to root. The
4535 effect of the bug was that timeouts during subsequent deliveries caused
4536 crashes instead of being properly handled. The handler is now left at its
4537 default (and expected) setting.
4539 2. The other case in which a daemon avoids a re-exec is to deliver an incoming
4540 message, again when deliver_drop_privilege is set or Exim is run as root.
4541 The bug described in (1) was not present in this case, but the tidying up
4542 of the other signals was missing. I have made the two cases consistent.
4544 3. The ignore_target_hosts setting on a manualroute router was being ignored
4545 for hosts that were looked up using the /MX notation.
4547 4. Added /ignore=<ip list> feature to @mx_any, @mx_primary, and @mx_secondary
4550 5. Change 4.31/55 was buggy, and broke when there was a rewriting rule that
4551 operated on the sender address. After changing the $sender_address to <>
4552 for the sender address verify, Exim was re-instated it as the original
4553 (before rewriting) address, but remembering that it had rewritten it, so it
4554 wasn't rewriting it again. This bug also had the effect of breaking the
4555 sender address verification caching when the sender address was rewritten.
4557 6. The ignore_target_hosts option was being ignored by the ipliteral router.
4558 This has been changed so that if the ip literal address matches
4559 ignore_target_hosts, the router declines.
4561 7. Added expansion conditions match_domain, match_address, and match_local_
4562 part (NOT match_host).
4564 8. The placeholder for the Received: header didn't have a length field set.
4566 9. Added code to Exim itself and to exim_lock to test for a specific race
4567 condition that could lead to file corruption when using MBX delivery. The
4568 issue is with the lockfile that is created in /tmp. If this file is removed
4569 after a process has opened it but before that process has acquired a lock,
4570 there is the potential for a second process to recreate the file and also
4571 acquire a lock. This could lead to two Exim processes writing to the file
4572 at the same time. The added code performs the same test as UW imapd; it
4573 checks after acquiring the lock that its file descriptor still refers to
4574 the same named file.
4576 10. The buffer for building added header lines was of fixed size, 8192 bytes.
4577 It is now parameterized by HEADER_ADD_BUFFER_SIZE and this can be adjusted
4580 11. Added the smtp_active_hostname option. If used, this will typically be made
4581 to depend on the incoming interface address. Because $interface_address is
4582 not set up until the daemon has forked a reception process, error responses
4583 that can happen earlier (such as "too many connections") no longer contain
4586 12. If an expansion in a condition on a "warn" statement fails because a lookup
4587 defers, the "warn" statement is abandoned, and the next ACL statement is
4588 processed. Previously this caused the whole ACL to be aborted.
4590 13. Added the iplsearch lookup type.
4592 14. Added ident_timeout as a log selector.
4594 15. Added tls_certificate_verified as a log selector.
4596 16. Added a global option tls_require_ciphers (compare the smtp transport
4597 option of the same name). This controls incoming TLS connections.
4599 17. I finally figured out how to make tls_require_ciphers do a similar thing
4600 in GNUtls to what it does in OpenSSL, that is, set up an appropriate list
4601 before starting the TLS session.
4603 18. Tabs are now shown as \t in -bP output.
4605 19. If the log selector return_path_on_delivery was set, Exim crashed when
4606 bouncing a message because it had too many Received: header lines.
4608 20. If two routers both had headers_remove settings, and the first one included
4609 a superfluous trailing colon, the final name in the first list and the
4610 first name in the second list were incorrectly joined into one item (with a
4611 colon in the middle).
4617 1. Added -C and -D options to the exinext utility, mainly to make it easier
4618 to include in the automated testing, but these could be helpful when
4619 multiple configurations are in use.
4621 2. The exinext utility was not formatting the output nicely when there was
4622 an alternate port involved in the retry record key, nor when there was a
4623 message id as well (for retries that were specific to a specific message
4624 and a specific host). It was also confused by IPv6 addresses, because of
4625 the additional colons they contain. I have fixed the IPv4 problem, and
4626 patched it up to do a reasonable job for IPv6.
4628 3. When there is an error after a MAIL, RCPT, or DATA SMTP command during
4629 delivery, the log line now contains "pipelined" if PIPELINING was used.
4631 4. An SMTP transport process used to panic and die if the bind() call to set
4632 an explicit outgoing interface failed. This has been changed; it is now
4633 treated in the same way as a connect() failure.
4635 5. A reference to $sender_host_name in the part of a conditional expansion
4636 that was being skipped was still causing a DNS lookup. This no longer
4639 6. The def: expansion condition was not recognizing references to header lines
4640 that used bh_ and bheader_.
4642 7. Added the _cache feature to named lists.
4644 8. The code for checking quota_filecount in the appendfile transport was
4645 allowing one more file than it should have been.
4647 9. For compatibility with Sendmail, the command line option
4655 and sets the incoming protocol and host name (for trusted callers). The
4656 host name and its colon can be omitted when only the protocol is to be set.
4657 Note the Exim already has two private options, -pd and -ps, that refer to
4658 embedded Perl. It is therefore impossible to set a protocol value of "d" or
4659 "s", but I don't think that's a major issue.
4661 10. A number of refactoring changes to the code, none of which should affect
4664 (a) The number of logging options was getting close to filling up the
4665 32-bit word that was used as a bit map. I have split them into two classes:
4666 those that are passed in the argument to log_write(), and those that are
4667 only ever tested independently outside of that function. These are now in
4668 separate 32-bit words, so there is plenty of room for expansion again.
4669 There is no change in the user interface or the logging behaviour.
4671 (b) When building, for example, log lines, the code previously used a
4672 macro that called string_cat() twice, in order to add two strings. This is
4673 not really sufficiently general. Furthermore, there was one instance where
4674 it was actually wrong because one of the argument was used twice, and in
4675 one call a function was used. (As it happened, calling the function twice
4676 did not affect the overall behaviour.) The macro has been replaced by a
4677 function that can join an arbitrary number of extra strings onto a growing
4680 (c) The code for expansion conditions now uses a table and a binary chop
4681 instead of a serial search (which was left over from when there were very
4682 few conditions). Also, it now recognizes conditions like "pam" even when
4683 the relevant support is not compiled in: a suitably worded error message is
4684 given if an attempt is made to use such a condition.
4686 11. Added ${time_interval:xxxxx}.
4688 12. A bug was causing one of the ddress fields not to be passed back correctly
4689 from remote delivery subprocesses. The field in question was not being
4690 subsequently used, so this caused to problems in practice.
4692 13. Added new log selectors queue_time and deliver_time.
4694 14. Might have fixed a bug in maildirsizefile handling that threw up
4695 "unexpected character" debug warnings, and recalculated the data
4696 unnecessarily. In any case, I expanded the warning message to give more
4699 15. Added the message "Restricted characters in address" to the statements in
4700 the default ACL that block characters like @ and % in local parts.
4702 16. Change 71 for release 4.31 proved to be much less benign that I imagined.
4703 Three changes have been made:
4705 (a) There was a serious bug; a negative response to MAIL caused the whole
4706 recipient domain to be cached as invalid, thereby blocking all messages
4707 to all local parts at the same domain, from all senders. This bug has
4708 been fixed. The domain is no longer cached after a negative response to
4709 MAIL if the sender used is not empty.
4711 (b) The default behaviour of using MAIL FROM:<> for recipient callouts has
4714 (c) A new callout option, "use_sender" has been added for people who want
4715 the modified behaviour.
4721 1. Removed "EXTRALIBS=-lwrap" from OS/Makefile-Unixware7 on the advice of
4724 2. Removed "LIBS = -lresolv" from OS/Makefile-Darwin as it is not needed, and
4725 indeed breaks things for older releases.
4727 3. Added additional logging to the case where there is a problem reading data
4728 from a filter that is running in a subprocess using a pipe, in order to
4729 try to track down a specific problem.
4731 4. Testing facility fudge: when running in the test harness and attempting
4732 to connect to 10.x.x.x (expecting a connection timeout) I'm now sometimes
4733 getting "No route to host". Convert this to a timeout.
4735 5. Define ICONV_ARG2_TYPE as "char **" for Unixware7 to avoid compiler
4738 6. Some OS don't have socklen_t but use size_t instead. This affects the
4739 fifth argument of getsockopt() amongst other things. This is now
4740 configurable by a macro called SOCKLEN_T which defaults to socklen_t, but
4741 can be set for individual OS. I have set it for SunOS5, OSF1, and
4742 Unixware7. Current versions of SunOS5 (aka Solaris) do have socklen_t, but
4743 some earlier ones do not.
4745 7. Change 4.30/15 was not doing the test caselessly.
4747 8. The standard form for an IPv6 address literal was being rejected by address
4748 parsing in, for example, MAIL and RCPT commands. An example of this kind of
4749 address is [IPv6:2002:c1ed:8229:10:202:2dff:fe07:a42a]. Exim now accepts
4750 this, as well as the form without the "IPv6" on the front (but only when
4751 address literals are enabled, of course).
4753 9. Added some casts to avoid compiler warnings in OS/os.c-Linux.
4755 10. Exim crashed if a message with an empty sender address specified by -f
4756 encountered a router with an errors_to setting. This could be provoked only
4757 by a command such as
4761 where an empty string was supplied; "<>" did not hit this bug.
4763 11. Installed PCRE release 4.5.
4765 12. If EHLO/HELO was rejected by an ACL, the value of $sender_helo_name
4766 remained set. It is now erased.
4768 13. exiqgrep wasn't working on MacOS X because it didn't correctly compute
4769 times from message ids (which are base 36 rather than the normal 62).
4771 14. "Expected" SMTP protocol errors that can arise when PIPELINING is in use
4772 were being counted as actual protocol errors, and logged if the log
4773 selector +smtp_protocol_error was set. One cannot be perfect in this test,
4774 but now, if PIPELINING has been advertised, RCPT following a rejected MAIL,
4775 and DATA following a set of rejected RCPTs do not count as protocol errors.
4776 In other words, Exim assumes they were pipelined, though this may not
4777 actually be the case. Of course, in all cases the client gets an
4778 appropriate error code.
4780 15. If a lookup fails in an ACL condition, a message about the failure may
4781 be available; it is used if testing the ACL cannot continue, because most
4782 such messages specify what the cause of the deferral is. However, some
4783 messages (e.g. "MYSQL: no data found") do not cause a defer. There was bug
4784 that caused an old message to be retained and used if a later statement
4785 caused a defer, replacing the real cause of the deferral.
4787 16. If an IP address had so many PTR records that the DNS lookup buffer
4788 was not large enough to hold them, Exim could crash while trying to process
4789 the truncated data. It now detects and logs this case.
4791 17. Further to 4.21/58, another change has been made: if (and only if) the
4792 first line of a message (the first header line) ends with CRLF, a bare LF
4793 in a subsequent header line has a space inserted after it, so as not to
4794 terminate the header.
4796 18. Refactoring: tidied an ugly bit of code in appendfile that copied data
4797 unnecessarily, used atoi() instead of strtol(), and didn't check the
4798 termination when getting file sizes from file names by regex.
4800 19. Completely re-implemented the support for maildirsize files, in the light
4801 of a number of problems with the previous contributed implementation
4802 (4.30/29). In particular:
4804 . If the quota is zero, the maildirsize file is maintained, but no quota is
4807 . If the maildir directory does not exist, it is created before any attempt
4808 to write a maildirsize file.
4810 . The quota value in the file is just a cache; if the quota is changed in
4811 the transport, the new value overrides.
4813 . A regular expression is available for excluding directories from the
4816 20. The autoreply transport checks the characters in options that define the
4817 message's headers; it allows continued headers, but it was checking with
4818 isspace() after an embedded newline instead of explicitly looking for a
4821 21. If all the "regular" hosts to which an address was routed had passed their
4822 expiry times, and had not reached their retry times, the address was
4823 bounced, even if fallback hosts were defined. Now Exim should go on to try
4826 22. Increased buffer sizes in the callout code from 1024 to 4096 to match the
4827 equivalent code in the SMTP transport. Some hosts send humungous responses
4828 to HELO/EHLO, more than 1024 it seems.
4830 23. Refactoring: code in filter.c used (void *) for "any old type" but this
4831 gives compiler warnings in some environments. I've now done it "properly",
4834 24. The replacement for inet_ntoa() that is used with gcc on IRIX systems
4835 (because of problems with the built-in one) was declared to return uschar *
4836 instead of char *, causing compiler failure.
4838 25. Fixed a file descriptor leak when processing alias/forward files.
4840 26. Fixed a minor format string issue in dbfn.c.
4842 27. Typo in exim.c: ("dmbnz" for "dbmnz").
4844 28. If a filter file refered to $h_xxx or $message_headers, and the headers
4845 contained RFC 2047 "words", Exim's memory could, under certain conditions,
4848 29. When a sender address is verified, it is cached, to save repeating the test
4849 when there is more than one recipient in a message. However, when the
4850 verification involves a callout, it is possible for different callout
4851 options to be set for different recipients. It is too complicated to keep
4852 track of this in the cache, so now Exim always runs a verification when a
4853 callout is required, relying on the callout cache for the optimization.
4854 The overhead is duplication of the address routing, but this should not be
4857 30. Fixed a bug in callout caching. If a RCPT command caused the sender address
4858 to be verified with callout=postmaster, and the main callout worked but the
4859 postmaster check failed, the verification correctly failed. However, if a
4860 subsequent RCPT command asked for sender verification *without* the
4861 postmaster check, incorrect caching caused this verification also to fail,
4864 31. Exim caches DNS lookup failures so as to avoid multiple timeouts; however,
4865 it was not caching the DNS options (qualify_single, search_parents) that
4866 were used when the lookup failed. A subsequent lookup with different
4867 options therefore always gave the same answer, though there were cases
4868 where it should not have. (Example: a "domains = !$mx_any" option on a
4869 dnslookup router: the "domains" option is always processed without any
4870 widening, but the router might have qualify_single set.) Now Exim uses the
4871 cached value only when the same options are set.
4873 32. Added John Jetmore's "exipick" utility to the distribution.
4875 33. GnuTLS: When an attempt to start a TLS session fails for any reason other
4876 than a timeout (e.g. a certificate is required, and is not provided), an
4877 Exim server now closes the connection immediately. Previously it waited for
4878 the client to close - but if the client is SSL, it seems that they each
4879 wait for each other, leading to a delay before one of them times out.
4881 34: GnuTLS: Updated the code to use the new GnuTLS 1.0.0 API. I have not
4882 maintained 0.8.x compatibility because I don't think many are using it, and
4883 it is clearly obsolete.
4885 35. Added TLS support for CRLs: a tls_crl global option and one for the smtp
4888 36. OpenSSL: $tls_certificate_verified was being set to 1 even if the
4889 client certificate was expired. A simple patch fixes this, though I don't
4890 understand the full logic of why the verify callback is called multiple
4893 37. OpenSSL: a patch from Robert Roselius: "Enable client-bug workaround.
4894 Versions of OpenSSL as of 0.9.6d include a 'CBC countermeasure' feature,
4895 which causes problems with some clients (such as the Certicom SSL Plus
4896 library used by Eudora). This option, SSL_OP_DONT_INSERT_EMPTY_FRAGMENTS,
4897 disables the coutermeasure allowing Eudora to connect."
4899 38. Exim was not checking that a write() to a log file succeeded. This could
4900 lead to Bad Things if a log got too big, in particular if it hit a file
4901 size limit. Exim now panics and dies if it cannot write to a log file, just
4902 as it does if it cannot open a log file.
4904 39. Modified OS/Makefile-Linux so that it now contains
4906 CFLAGS=-O -D_FILE_OFFSET_BITS=64 -D_LARGEFILE_SOURCE
4908 The two -D definitions ensure that Exim is compiled with large file
4909 support, which makes it possible to handle log files that are bigger than
4912 40. Fixed a subtle caching bug: if (in an ACL or a set of routers, for
4913 instance) a domain was checked against a named list that involved a lookup,
4914 causing $domain_data to be set, then another domain was checked against the
4915 same list, then the first domain was re-checked, the value of $domain_data
4916 after the final check could be wrong. In particular, if the second check
4917 failed, it could be set empty. This bug probably also applied to
4920 41. The strip_trailing_dot option was not being applied to the address given
4921 with the -f command-line option.
4923 42. The code for reading a message's header from the spool was incrementing
4924 $received_count, but never initializing it. This meant that the value was
4925 incorrect (doubled) while delivering a message in the same process in which
4926 it was received. In the most common configuration of Exim, this never
4927 happens - a fresh exec is done - but it can happen when
4928 deliver_drop_privilege is set.
4930 43. When Exim logs an SMTP synchronization error - client data sent too soon -
4931 it now includes up to 150 characters of the unexpected data in the log
4934 44. The exim_dbmbuild utility uses fixed size buffers for reading input lines
4935 and building data strings. The size of both of these buffers was 10 000
4936 bytes - far larger than anybody would *ever* want, thought I. Needless to
4937 say, somebody hit the limit. I have increased the maximum line length to
4938 20 000 and the maximum data length of concatenated lines to 100 000. I have
4939 also fixed two bugs, because there was no checking on these buffers. Tsk,
4940 tsk. Now exim_dbmbuild gives a message and exits with an error code if a
4941 buffer is too small.
4943 45. The exim_dbmbuild utility did not support quoted keys, as Exim does in
4944 lsearch lookups. Now it does.
4946 46. When parsing a route_list item in a manualroute router, a fixed-length
4947 buffer was used for the list of hosts. I made this 1024 bytes long,
4948 thinking that nobody would ever have a list of hosts that long. Wrong.
4949 Somebody had a whole pile of complicated expansion conditions, and the
4950 string was silently truncated, leading to an expansion error. It turns out
4951 that it is easier to change to an unlimited length (owing to other changes
4952 that have happened since this code was originally written) than to build
4953 structure for giving a limitation error. The length of the item that
4954 expands into the list of hosts is now unlimited.
4956 47. The lsearch lookup could not handle data where the length of text line was
4957 more than 4095 characters. Such lines were truncated, leading to shortened
4958 data being returned. It should now handle lines of any length.
4960 48. Minor wording revision: "cannot test xxx in yyy ACL" becomes "cannot test
4961 xxx condition in yyy ACL" (e.g. "cannot test domains condition in DATA
4964 49. Cosmetic tidy to scripts like exicyclog that are generated by globally
4965 replacing strings such as BIN_DIRECTORY in a source file: the replacement
4966 no longer happens in comment lines. A list of replacements is now placed
4967 at the head of all of the source files, except those whose only change is
4968 to replace PERL_COMMAND in the very first #! line.
4970 50. Replaced the slow insertion sort in queue.c, for sorting the list of
4971 messages on the queue, with a bottom-up merge sort, using code contributed
4972 by Michael Haardt. This should make operations like -bp somewhat faster on
4973 large queues. It won't affect queue runners, except when queue_run_in_order
4976 51. Installed eximstats 1.31 in the distribution.
4978 52. Added support for SRV lookups to the dnslookup router.
4980 53. If an ACL referred to $message_body or $message_body_end, the value was not
4981 reset for any messages that followed in the same SMTP session.
4983 54. The store-handling optimization for building very long strings was not
4984 differentiating between the different store pools. I don't think this
4985 actually made any difference in practice, but I've tidied it.
4987 55. While running the routers to verify a sender address, $sender_address
4988 was still set to the sender address. This is wrong, because when routing to
4989 send a bounce to the sender, it would be empty. Therefore, I have changed
4990 it so that, while verifying a sender address, $sender_address is set to <>.
4991 (There is no change to what happens when verifying a recipient address.)
4993 56. After finding MX (or SRV) records, Exim was doing a DNS lookup for the
4994 target A or AAAA records (if not already returned) without resetting the
4995 qualify_single or search_parents options of the DNS resolver. These are
4996 inappropriate in this case because the targets of MX and SRV records must
4997 be FQDNs. A broken DNS record could cause trouble if it happened to have a
4998 target that, when qualified, matched something in the local domain. These
4999 two options are now turned off when doing these lookups.
5001 57. It seems that at least some releases of Reiserfs (which does not have the
5002 concept of a fixed number of inodes) returns zero and not -1 for the
5003 number of available inodes. This interacted badly with check_spool_inodes,
5004 which assumed that -1 was the "no such thing" setting. What I have done is
5005 to check that the total number of inodes is greater than zero before doing
5006 the test of how many are available.
5008 58. When a "warn" ACL statement has a log_message modifier, the message is
5009 remembered, and not repeated. This is to avoid a lot of repetition when a
5010 message has many recipients that cause the same warning to be written.
5011 Howewer, Exim was preserving the list of already written lines for an
5012 entire SMTP session, which doesn't seem right. The memory is now reset if a
5013 new message is started.
5015 59. The "rewrite" debugging flag was not showing the result of rewriting in the
5016 debugging output unless log_rewrite was also set.
5018 60. Avoid a compiler warning on 64-bit systems in dsearch.c by avoiding the use
5019 of (int)(handle) when we know that handle contains (void *)(-1).
5021 61. The Exim daemon panic-logs an error return when it closes the incoming
5022 connection. However "connection reset by peer" seems to be common, and
5023 isn't really an error worthy of noting specially, so that particular error
5026 62. When Exim is trying to find all the local interfaces, it used to panic and
5027 die if the ioctl to get the interface flags failed. However, it seems that
5028 on at least one OS (Solaris 9) it is possible to have an interface that is
5029 included in the list of interfaces, but for which you get a failure error
5030 for this call. This happens when the interface is not "plumbed" into a
5031 protocol (i.e. neither IPv4 nor IPv6). I've changed the code so that a
5032 failure of the "get flags" call assumes that the interface is down.
5034 63. Added a ${eval10: operator, which assumes all numbers are decimal. This
5035 makes life easier for people who are doing arithmetic on fields extracted
5036 from dates, where you often get leading zeros that should not be
5037 interpreted as octal.
5039 64. Added qualify_domain to the redirect router, to override the global
5042 65. If a pathologically long header line contained very many addresses (the
5043 report of this problem mentioned 10 000) and each of them was rewritten,
5044 Exim could use up a very large amount of memory. (It kept on making new
5045 copies of the header line as it rewrote, and never released the old ones.)
5046 At the expense of a bit more processing, the header rewriting function has
5047 been changed so that it no longer eats memory in this way.
5049 66. The generation of the Received: header has been moved from the time that a
5050 message starts to be received, to the time that it finishes. The timestamp
5051 in the Received: header should now be very close to that of the <= log
5052 line. There are two side-effects of this change:
5054 (a) If a message is rejected by a DATA or non-SMTP ACL or local_scan(), the
5055 logged header lines no longer include the local Received: line, because
5056 it has not yet been created. The same applies to a copy of the message
5057 that is returned to a non-SMTP sender when a message is rejected.
5059 (b) When a filter file is tested using -bf, no additional Received: header
5060 is added to the test message. After some thought, I decided that this
5063 This change does not affect the value of $received_for. It is still set
5064 after address rewriting, but before local_scan() is called.
5066 67. Installed the latest Cygwin-specific files from the Cygwin maintainer.
5068 68. GnuTLS: If an empty file is specified for tls_verify_certificates, GnuTLS
5069 gave an unhelpful panic error message, and a defer error. I have managed to
5070 change this behaviour so that it now rejects any supplied certificate,
5071 which seems right, as the list of acceptable certificates is empty.
5073 69. OpenSSL: If an empty file is specified for tls_verify_certificates, OpenSSL
5074 gave an unhelpful defer error. I have not managed to make this reject any
5075 supplied certificates, but the error message it gives is "no certificate
5076 supplied", which is not helpful.
5078 70. exigrep's output now also includes lines that are not associated with any
5079 message, but which match the given pattern. Implemented by a patch from
5080 Martin Sluka, which also tidied up the Perl a bit.
5082 71. Recipient callout verification, like sender verification, was using <> in
5083 the MAIL FROM command. This isn't really the right thing, since the actual
5084 sender may affect whether the remote host accepts the recipient or not. I
5085 have changed it to use the actual sender in the callout; this means that
5086 the cache record is now keyed on a recipient/sender pair, not just the
5087 recipient address. There doesn't seem to be a real danger of callout loops,
5088 since a callout by the remote host to check the sender would use <>.
5089 [SEE ABOVE: changed after hitting problems.]
5091 72. Exim treats illegal SMTP error codes that do not begin with 4 or 5 as
5092 temporary errors. However, in the case of such a code being given after
5093 the end of a data transmission (i.e. after ".") Exim was failing to write
5094 a retry record for the message. (Yes, there was some broken host that was
5095 actually sending 8xx at this point.)
5097 73. An unknown lookup type in a host list could cause Exim to panic-die when
5098 the list was checked. (An example that provoked this was putting <; in the
5099 middle of a list instead of at the start.) If this happened during a DATA
5100 ACL check, a -D file could be left lying around. This kind of configuration
5101 error no longer causes Exim to die; instead it causes a defer errror. The
5102 incident is still logged to the main and panic logs.
5104 74. Buglet left over from Exim 3 conversion. The message "too many messages
5105 in one connection" was written to the rejectlog but not the mainlog, except
5106 when address rewriting (yes!) was being logged.
5108 75. Added write_rejectlog option.
5110 76. When a system filter was run not as root (that is, when system_filter_user
5111 was set), the values of the $n variables were not being returned to the
5112 main process; thus, they were not subsequently available in the $sn
5115 77. Added +return_path_on_delivery log selector.
5117 78. A connection timeout was being treated differently from recipients deferred
5118 when testing hosts_max_try with a message that was older than the host's
5119 retry timeout. (The host should not be counted, thus allowing all hosts to
5120 be tried at least once before bouncing.) This may have been the cause of an
5121 occasionally reported bug whereby a message would remain on the queue
5122 longer than the retry timeout, but would be bounced if a delivery was
5123 forced. I say "may" because I never totally pinned down the problem;
5124 setting up timeout/retry tests is difficult. See also the next item.
5126 79. The ultimate address timeout was not being applied to errors that involved
5127 a combination of host plus message (for example, a timeout on a MAIL
5128 command). When an address resolved to a number of possible hosts, and they
5129 were not all tried for each delivery (e.g. because of hosts_max_try), a
5130 message could remain on the queue longer than the retry timeout.
5132 80. Sieve bug: "stop" inside "elsif" was broken. Applied a patch from Michael
5135 81. Fixed an obscure SMTP outgoing bug which required at least the following
5136 conditions: (a) there was another message waiting for the same server;
5137 (b) the server returned 5xx to all RCPT commands in the first message so
5138 that the message was not completed; (c) the server dropped the connection
5139 or gave a negative response to the RSET that Exim sends to abort the
5140 transaction. The observed case was a dropped connection after DATA that had
5141 been sent in pipelining mode. That is, the server had advertised PIPELINING
5142 but was not implementing it correctly. The effect of the bug was incorrect
5143 behaviour, such as trying another host, and this could lead to a crash.
5149 1. The 3rd arguments to getsockname(), getpeername(), and accept() in exim.c
5150 and daemon.c were passed as pointers to ints; they should have been
5151 pointers to socklen_t variables (which are typically unsigned ints).
5153 2. Some signed/unsigned type warnings in the os.c file for Linux have been
5156 3. Fixed a really odd bug that affected only the testing scheme; patching a
5157 certain fixed string in the binary changed the value of another string that
5158 happened to be identical to the end of the original first string.
5160 4. When gethostbyname() (or equivalent) is passed an IP address as a "host
5161 name", it returns that address as the IP address. On some operating
5162 systems (e.g. Solaris), it also passes back the IP address string as the
5163 "host name". However, on others (e.g. Linux), it passes back an empty
5164 string. Exim wasn't checking for this, and was changing the host name to an
5165 empty string, assuming it had been canonicized.
5167 5. Although rare, it is permitted to have more than one PTR record for a given
5168 IP address. I thought that gethostbyaddr() or getipnodebyaddr() always gave
5169 all the names associated with an address, because they do in Solaris.
5170 However, it seems that they do not in Linux for data that comes from the
5171 DNS. If an address in /etc/hosts has multiple names, they _are_ all given.
5172 I found this out when I moved to a new Linux workstation and tried to run
5173 the Exim test suite.
5175 To get round this problem I have changed the code so that it now does its
5176 own call to the DNS to look up PTR records when searching for a host name.
5177 If nothing can be found in the DNS, it tries gethostbyaddr(), so that
5178 addresses that are only in /etc/hosts are still found.
5180 This behaviour is, however, controlled by an option called host_lookup_
5181 order, which defaults to "bydns:byaddr". If people want to use the other
5182 order, or indeed, just use one or the other means of lookup, they can
5183 specify it in this variable.
5185 6. If a PTR record yields an empty name, Exim treats it as non-existent. In
5186 some operating systems, this comes back from gethostbyaddr() as an empty
5187 string, and this is what Exim used to test for. However, it seems that in
5188 other systems, "." is yielded. Exim now tests for this case too.
5190 7. The values of check_spool_space and check_log_space are now held internally
5191 as a number of kilobytes instead of an absolute number of bytes. If a
5192 numbers is specified without 'K' or 'M', it is rounded up to the nearest
5193 kilobyte. This means that much larger values can be stored.
5195 8. Exim monitor: an attempt to get the action menu when not actually pointing
5196 at a message produces an empty menu entitled "No message selected". This
5197 works on Solaris (OpenWindows). However, XFree86 does not like a menu with
5198 no entries in it ("Shell widget menu has zero width and/or height"). So I
5199 have added a single, blank menu entry in this case.
5201 9. Added ${quote_local_part.
5203 10. MIME decoding is now applied to the contents of Subject: header lines when
5206 11. Now that a reference to $sender_host_address automatically causes a reverse
5207 lookup to occur if necessary (4.13/18), there is no need to arrange for a
5208 host lookup before query-style lookups in lists that might use this
5209 variable. This has therefore been abolished, and the "net-" prefix is no
5210 longer necessary for query-style lookups.
5212 12. The Makefile for SCO_SV contained a setting of LDFLAGS. This appears to
5213 have been a typo for LFLAGS, so it has been changed.
5215 13. The install script calls Exim with "-C /dev/null" in order to find the
5216 version number. If ALT_CONFIG_PREFIX was set, this caused an error message
5217 to be output. Howeve, since Exim outputs its version number before the
5218 error, it didn't break the script. It just looked ugly. I fixed this by
5219 always allowing "-C /dev/null" if the caller is root.
5221 14. Ignore overlarge ACL variable number when reading spool file - insurance
5222 against a later release with more variables having written the file.
5224 15. The standard form for an IPv6 address literal was being rejected by EHLO.
5225 Example: [IPv6:2002:c1ed:8229:10:202:2dff:fe07:a42a]. Exim now accepts
5226 this, as well as the form without the "IPv6" on the front.
5228 16. Added CHOWN_COMMAND=/usr/sbin/chown and LIBS=-lresolv to the
5229 OS/Makefile-Darwin file.
5231 17. Fixed typo in lookups/ldap.c: D_LOOKUP should be D_lookup. This applied
5232 only to LDAP libraries that do not have LDAP_OPT_DEREF.
5234 18. After change 4.21/52, "%ld" was used to format the contents of the $inode
5235 variable. However, some OS use ints for inodes. I've added cast to long int
5236 to get rid of the compiler warning.
5238 19. I had forgotten to lock out "/../" in configuration file names when
5239 ALT_CONFIG_PREFIX was set.
5241 20. Routers used for verification do not need to specify transports. However,
5242 if such a router generated a host list, and callout was configured, Exim
5243 crashed, because it could not find a port number from the (non-existent)
5244 transport. It now assumes port 25 in this circumstance.
5246 21. Added the -t option to exigrep.
5248 22. If LOOKUP_LSEARCH is defined, all three linear search methods (lsearch,
5249 wildlsearch, nwildlsearch) are compiled. LOOKUP_WILDLSEARCH and LOOKUP_
5250 NWILDLSEARCH are now obsolete, but retained for compatibility. If either of
5251 them is set, LOOKUP_LSEARCH is forced.
5253 23. "exim -bV" now outputs a list of lookups that are included in the binary.
5255 24. Added sender and host information to the "rejected by local_scan()" log
5256 line; previously there was no indication of these.
5258 25. Added .include_if_exists.
5260 26. Change 3.952/11 added an explicit directory sync on top of a file sync for
5261 Linux. It turns out that not all file systems support this. Apparently some
5262 versions of NFS do not. (It's rare to put Exim's spool on NFS, but people
5263 do it.) To cope with this, the error EINVAL, which means that sync-ing is
5264 not supported on the file descriptor, is now ignored when Exim is trying to
5265 sync a directory. This applies only to Linux.
5267 27. Added -DBIND_8_COMPAT to the CLFAGS setting for Darwin.
5269 28. In Darwin (MacOS X), the PAM headers are in /usr/include/pam and not in
5270 /usr/include/security. There's now a flag in OS/os.h-Darwin to cope with
5273 29. Added support for maildirsize files from supplied patch (modified a bit).
5275 30. The use of :fail: followed by an empty string could lead Exim to respond to
5276 sender verification failures with (e.g.):
5278 550 Verification failed for <xxx>
5279 550 Sender verify failed
5281 where the first response line was missing the '-' that indicates it is not
5282 the final line of the response.
5284 31. The loop for finding the name of the user that called Exim had a hardwired
5285 limit of 10; it now uses the value of finduser_retries, which is used for
5286 all other user lookups.
5288 32. Added $received_count variable, available in data and not_smtp ACLs, and at
5291 33. Exim was neglecting to zero errno before one call of strtol() when
5292 expanding a string and expecting an integer value. On some systems this
5293 resulted in spurious "integer overflow" errors. Also, it was casting the
5294 result into an int without checking.
5296 34. Testing for a connection timeout using "timeout_connect" in the retry rules
5297 did not work. The code looks as if it has *never* worked, though it appears
5298 to have been documented since at least releast 1.62. I have made it work.
5300 35. The "timeout_DNS" error in retry rules, also documented since at least
5301 1.62, also never worked. As it isn't clear exactly what this means, and
5302 clearly it isn't a major issue, I have abolished the feature by treating it
5303 as "timeout", and writing a warning to the main and panic logs.
5305 36. The display of retry rules for -brt wasn't always showing the error code
5308 37. Added new error conditions to retry rules: timeout_A, timeout_MX,
5309 timeout_connect_A, timeout_connect_MX.
5311 38. Rewriting the envelope sender at SMTP time did not allow it to be rewritten
5312 to the empty sender.
5314 39. The daemon was not analysing the content of -oX till after it had closed
5315 stderr and disconnected from the controlling terminal. This meant that any
5316 syntax errors were only noted on the panic log, and the return code from
5317 the command was 0. By re-arranging the code a little, I've made the
5318 decoding happen first, so such errors now appear on stderr, and the return
5319 code is 1. However, the actual setting up of the sockets still happens in
5320 the disconnected process, so errors there are still only recorded on the
5323 40. A daemon listener on a wildcard IPv6 socket that also accepts IPv4
5324 connections (as happens on some IP stacks) was logged at start up time as
5325 just listening for IPv6. It now logs "IPv6 with IPv4". This differentiates
5326 it from "IPv6 and IPv4", which means that two separate sockets are being
5329 41. The debug output for gethostbyname2() or getipnodebyname() failures now
5330 says whether AF_INET or AF_INET6 was passed as an argument.
5332 42. Exiwhat output was messed up when time zones were included in log
5335 43. Exiwhat now gives more information about the daemon's listening ports,
5336 and whether -tls-on-connect was used.
5338 44. The "port" option of the smtp transport is now expanded.
5340 45. A "message" modifier in a "warn" statement in a non-message ACL was being
5341 silently ignored. Now an error message is written to the main and panic
5344 46. There's a new ACL modifier called "logwrite" which writes to a log file
5345 as soon as it is encountered.
5347 47. Added $local_user_uid and $local_user_gid at routing time.
5349 48. Exim crashed when trying to verify a sender address that was being
5352 49. Exim was recognizing only a space character after ".include". It now also
5353 recognizes a tab character.
5355 50. Fixed several bugs in the Perl script that creates the exim.8 man page by
5356 extracting the relevant information from the specification. The man page no
5357 longer contains scrambled data for the -d option, and I've added a section
5358 at the front about calling Exim under different names.
5360 51. Added "extra_headers" argument to the "mail" command in filter files.
5362 52. Redirecting mail to an unqualified address in a Sieve filter caused Exim to
5365 53. Installed eximstats 1.29.
5367 54. Added transport_filter_timeout as a generic transport option.
5369 55. Exim no longer adds an empty Bcc: header to messages that have no To: or
5370 Cc: header lines. This was required by RFC 822, but it not required by RFC
5373 56. Exim used to add From:, Date:, and Message-Id: header lines to any
5374 incoming messages that did not have them. Now it does so only if the
5375 message originates locally, that is, if there is no associated remote host
5376 address. When Resent- header lines are present, this applies to the Resent-
5377 lines rather than the non-Resent- lines.
5379 57. Drop incoming SMTP connection after too many syntax or protocol errors. The
5380 limit is controlled by smtp_max_synprot_errors, defaulting to 3.
5382 58. Messages for configuration errors now include the name of the main
5383 configuration file - useful now that there may be more than one file in a
5384 list (.included file names were always shown).
5386 59. Change 4.21/82 (run initgroups() when starting the daemon) causes problems
5387 for those rare installations that do not start the daemon as root or run it
5388 setuid root. I've cut out the call to initgroups() if the daemon is not
5391 60. The Exim user and group can now be bound into the binary as text strings
5392 that are looked up at the start of Exim's processing.
5394 61. Applied a small patch for the Interbase code, supplied by Ard Biesheuvel.
5396 62. Added $mailstore_basename variable.
5398 63. Installed patch to sieve.c from Michael Haardt.
5400 64. When Exim failed to open the panic log after failing to open the main log,
5401 the original message it was trying to log was written to stderr and debug
5402 output, but if they were not available (the usual case in production), it
5403 was lost. Now it is written to syslog before the two lines that record the
5404 failures to open the logs.
5406 65. Users' Exim filters run in subprocesses under the user's uid. It is
5407 possible for a "deliver" command or an alias in a "personal" command to
5408 provoke an address rewrite. If logging of address rewriting is configured,
5409 this fails because the process is not running as root or exim. There may be
5410 a better way of dealing with this, but for the moment (because 4.30 needs
5411 to be released), I have disabled address rewrite logging when running a
5412 filter in a non-root, non-exim process.
5418 1. The buildconfig auxiliary program wasn't quoting the value set for
5419 HEADERS_CHARSET. This caused a compilation error complaining that 'ISO' was
5420 not defined. This bug was masked in 4.22 by the effect that was fixed in
5423 2. Some messages that were rejected after a message id was allocated were
5424 shown as "incomplete" by exigrep. It no longer does this for messages that
5425 are rejected by local_scan() or the DATA or non-SMTP ACLs.
5427 3. If a Message-ID: header used a domain literal in the ID, and Exim did not
5428 have allow_domain_literals set, the ID did not get logged in the <= line.
5429 Domain literals are now always recognized in Message-ID: header lines.
5431 4. The first argument for a ${extract expansion item is the key name or field
5432 number. Leading and trailing spaces in this item were not being ignored,
5433 causing some misleading effects.
5435 5. When deliver_drop_privilege was set, single queue runner processes started
5436 manually (i.e. by the command "exim -q") or by the daemon (which uses the
5437 same command in the process it spins off) were not dropping privilege.
5439 6. When the daemon running as "exim" started a queue runner, it always
5440 re-executed Exim in the spun-off process. This is a waste of effort when
5441 deliver_drop_privilege is set. The new process now just calls the
5442 queue-runner function directly.
5448 1. Typo in the src/EDITME file: it referred to HEADERS_DECODE_TO instead of
5451 2. Change 4.21/73 introduced a bug. The pid file path set by -oP was being
5452 ignored. Though the use of -oP was forcing the writing of a pid file, it
5453 was always written to the default place.
5455 3. If the message "no IP address found for host xxxx" is generated during
5456 incoming verification, it is now followed by identification of the incoming
5457 connection (so you can more easily find what provoked it).
5459 4. Bug fix for Sieve filters: "stop" inside a block was not working properly.
5461 5. Added some features to "harden" Exim a bit more against certain attacks:
5463 (a) There is now a build-time option called FIXED_NEVER_USERS that can
5464 be put in Local/Makefile. This is like the never_users runtime option,
5465 but it cannot be overridden. The default setting is "root".
5467 (b) If ALT_CONFIG_PREFIX is defined in Local/Makefile, it specifies a
5468 prefix string with which any file named in a -C command line option
5471 (c) If ALT_CONFIG_ROOT_ONLY is defined in Local/Makefile, root privilege
5472 is retained for -C and -D only if the caller of Exim is root. Without
5473 it, the exim user may also use -C and -D and retain privilege.
5475 (d) If DISABLE_D_OPTION is defined in Local/Makefile, the use of the -D
5476 command line option is disabled.
5478 6. Macro names set by the -D option must start with an upper case letter, just
5479 like macro names defined in the configuration file.
5481 7. Added "dereference=" facility to LDAP.
5483 8. Two instances of the typo "uknown" in the source files are fixed.
5485 9. If a PERL_COMMAND setting in Local/Makefile was not at the start of a line,
5486 the Configure-Makefile script screwed up while processing it.
5488 10. Incorporated PCRE 4.4.
5490 11. The SMTP synchronization check was not operating right at the start of an
5491 SMTP session. For example, it could not catch a HELO sent before the client
5492 waited for the greeting. There is now a check for outstanding input at the
5493 point when the greeting is written. Because of the duplex, asynchronous
5494 nature of TCP/IP, it cannot be perfect - the incorrect input may be on its
5495 way, but not yet received, when the check is performed.
5497 12. Added tcp_nodelay to make it possible to turn of the setting of TCP_NODELAY
5498 on TCP/IP sockets, because this apparently causes some broken clients to
5501 13. Installed revised OS/Makefile-CYGWIN and OS/os.c-cygwin (the .h file was
5502 unchanged) from the Cygwin maintainer.
5504 14. The code for -bV that shows what is in the binary showed "mbx" when maildir
5505 was supported instead of testing for mbx. Effectively a typo.
5507 15. The spa authenticator server code was not checking that the input it
5508 received was valid base64.
5510 16. The debug output line for the "set" modifier in ACLs was not showing the
5511 name of the variable that was being set.
5513 17. Code tidy: the variable type "vtype_string" was never used. Removed it.
5515 18. Previously, a reference to $sender_host_name did not cause a DNS reverse
5516 lookup on its own. Something else was needed to trigger the lookup. For
5517 example, a match in host_lookup or the need for a host name in a host list.
5518 Now, if $sender_host_name is referenced and the host name has not yet been
5519 looked up, a lookup is performed. If the lookup fails, the variable remains
5520 empty, and $host_lookup_failed is set to "1".
5522 19. Added "eqi" as a case-independent comparison operator.
5524 20. The saslauthd authentication condition could segfault if neither service
5525 nor realm was specified.
5527 21. If an overflowing value such as "2048M" was set for message_size_limit, the
5528 error message that was logged was misleading, and incoming SMTP
5529 connections were dropped. The message is now more accurate, and temporary
5530 errors are given to SMTP connections.
5532 22. In some error situations (such as 21 above) Exim rejects all SMTP commands
5533 (except RSET) with a 421 error, until QUIT is received. However, it was
5534 failing to send a response to QUIT.
5536 23. The HELO ACL was being run before the code for helo_try_verify_hosts,
5537 which made it impossible to use "verify = helo" in the HELO ACL. The HELO
5538 ACL is now run after the helo_try_verify_hosts code.
5540 24. "{MD5}" and "{SHA1}" are now recognized as equivalent to "{md5"} and
5541 "{sha1}" in the "crypteq" expansion condition (in fact the comparison is
5542 case-independent, so other case variants are also recognized). Apparently
5543 some systems use these upper case variants.
5545 25. If more than two messages were waiting for the same host, and a transport
5546 filter was specified for the transport, Exim sent two messages over the
5547 same TCP/IP connection, and then failed with "socket operation on non-
5548 socket" when it tried to send the third.
5550 26. Added Exim::debug_write and Exim::log_write for embedded Perl use.
5552 27. The extern definition of crypt16() in expand.c was not being excluded when
5553 the OS had its own crypt16() function.
5555 28. Added bounce_return_body as a new option, and bounce_return_size_limit
5556 as a preferred synonym for return_size_limit, both as an option and as an
5559 29. Added LIBS=-liconv to OS/Makefile-OSF1.
5561 30. Changed the default configuration ACL to relax the local part checking rule
5562 for addresses that are not in any local domains. For these addresses,
5563 slashes and pipe symbols are allowed within local parts, but the sequence
5564 /../ is explicitly forbidden.
5566 31. SPA server authentication was not clearing the challenge buffer before
5569 32. log_message in a "warn" ACL statement was writing to the reject log as
5570 well as to the main log, which contradicts the documentation and doesn't
5571 seem right (because no rejection is happening). So I have stopped it.
5573 33. Added Ard Biesheuvel's lookup code for accessing an Interbase database.
5574 However, I am unable to do any testing of this.
5576 34. Fixed an infelicity in the appendfile transport. When checking directories
5577 for a mailbox, to see if any needed to be created, it was accidentally
5578 using path names with one or more superfluous leading slashes; tracing
5579 would show up entries such as stat("///home/ph10", 0xFFBEEA48).
5581 35. If log_message is set on a "discard" verb in a MAIL or RCPT ACL, its
5582 contents are added to the log line that is written for every discarded
5583 recipient. (Previously a log_message setting was ignored.)
5585 36. The ${quote: operator now quotes the string if it is empty.
5587 37. The install script runs exim in order to find its version number. If for
5588 some reason other than non-existence or emptiness, which it checks, it
5589 could not run './exim', it was installing it with an empty version number,
5590 i.e. as "exim-". This error state is now caught, and the installation is
5593 38. An argument was missing from the function that creates an error message
5594 when Exim fails to connect to the socket for saslauthd authentication.
5595 This could cause Exim to crash, or give a corrupted message.
5597 39. Added isip, isip4, and isip6 to ${if conditions.
5599 40. The ACL variables $acl_xx are now saved with the message, and can be
5600 accessed later in routers, transports, and filters.
5602 41. The new lookup type nwildlsearch is like wildlsearch, except that the key
5603 strings in the file are not string-expanded.
5605 42. If a MAIL command specified a SIZE value that was too large to fit into an
5606 int variable, the check against message_size_limit failed. Such values are
5607 now forced to INT_MAX, which is around 2Gb for a 32-bit variable. Maybe one
5608 day this will have to be increased, but I don't think I want to be around
5609 when emails are that large.
5616 1. Removed HAVE_ICONV=yes from OS/Makefile-FreeBSD, since it seems that
5617 iconv() is not standard in FreeBSD.
5619 2. Change 4.21/17 was buggy and could cause stack overwriting on a system with
5620 IPv6 enabled. The observed symptom was a segmentation fault on return from
5621 the function os_common_find_running_interfaces() in src/os.c.
5623 3. In the check_special_case() function in daemon.c I had used "errno" as an
5624 argument name, which causes warnings on some systems. This was basically a
5625 typo, since it was named "eno" in the comments!
5627 4. The code that waits for the clock to tick (at a resolution of some fraction
5628 of a second) so as to ensure message-id uniqueness was always waiting for
5629 at least one whole tick, when it could have waited for less. [This is
5630 almost certainly not relevant at current processor speeds, where it is
5631 unlikely to ever wait at all. But we try to future-proof.]
5633 5. The function that sleeps for a time interval that includes fractions of a
5634 second contained a race. It did not block SIGALRM between setting the
5635 timer, and suspending (a couple of lines later). If the interval was short
5636 and the sigsuspend() was delayed until after it had expired, the suspension
5637 never ended. On busy systems this could lead to processes getting stuck for
5640 6. Some uncommon configurations may cause a lookup to happen in a queue runner
5641 process, before it forks any delivery processes. The open lookup caching
5642 mechanism meant that the open file or database connection was passed into
5643 the delivery process. The problem was that delivery processes always tidy
5644 up cached lookup data. This could cause a problem for the next delivery
5645 process started by the queue runner, because the external queue runner
5646 process does not know about the closure. So the next delivery process
5647 still has data in the lookup cache. In the case of a file lookup, there was
5648 no problem because closing a file descriptor in a subprocess doesn't affect
5649 the parent. However, if the lookup was caching a connection to a database,
5650 the connection was closed, and the second delivery process was likely to
5651 see errors such as "PGSQL: query failed: server closed the connection
5652 unexpectedly". The problem has been fixed by closing all cached lookups
5653 in a queue runner before running a delivery process.
5655 7. Compiler warning on Linux for the second argument of iconv(), which doesn't
5656 seem to have the "const" qualifier which it has on other OS. I've
5659 8. Change 4.21/2 was too strict. It is only if there are two authenticators
5660 *of the same type* (client or server) with the same public name that an
5661 error should be diagnosed.
5663 9. When Exim looked up a host name for an IP address, but failed to find the
5664 original IP address when looking up the host name (a safety check), it
5665 output the message "<ip address> does not match any IP for NULL", which was
5666 confusing, to say the least. The bug was that the host name should have
5667 appeared instead of "NULL".
5669 10. Since release 3.03, if Exim is called by a uid other than root or the Exim
5670 user that is built into the binary, and the -C or -D options is used, root
5671 privilege is dropped before the configuration file is read. In addition,
5672 logging is switched to stderr instead of the normal log files. If the
5673 configuration then re-defines the Exim user, the unprivileged environment
5674 is probably not what is expected, so Exim logs a panic warning message (but
5677 However, if deliver_drop_privilege is set, the unprivileged state may well
5678 be exactly what is intended, so the warning has been cut out in that case,
5679 and Exim is allowed to try to write to its normal log files.
5685 1. smtp_return_error_details was not giving details for temporary sender
5686 or receiver verification errors.
5688 2. Diagnose a configuration error if two authenticators have the same public
5691 3. Exim used not to create the message log file for a message until the first
5692 delivery attempt. This could be confusing when incoming messages were held
5693 for policy or load reasons. The message log file is now created at the time
5694 the message is received, and an initial "Received" line is written to it.
5696 4. The automatically generated man page for command line options had a minor
5697 bug that caused no ill effects; however, a more serious problem was that
5698 the procedure for building the man page automatically didn't always
5699 operate. Consequently, release 4.20 contains an out-of-date version. This
5700 shouldn't happen again.
5702 5. When building Exim with embedded Perl support, the script that builds the
5703 Makefile was calling 'perl' to find its compile-time parameters, ignoring
5704 any setting of PERL_COMMAND in Local/Makefile. This is now fixed.
5706 6. The freeze_tell option was not being used for messages that were frozen on
5707 arrival, either by an ACL or by local_scan().
5709 7. Added the smtp_incomplete_transaction log selector.
5711 8. After STARTTLS, Exim was not forgetting that it had advertised AUTH, so it
5712 was accepting AUTH without a new EHLO.
5714 9. Added tls_remember_esmtp to cope with YAEB. This allows AUTH and other
5715 ESMTP extensions after STARTTLS without a new EHLO, in contravention of the
5718 10. Logging of TCP/IP connections (when configured) now happens in the main
5719 daemon process instead of the child process, so that the TCP/IP connection
5720 count is more accurate (but it can never be perfect).
5722 11. The use of "drop" in a nested ACL was not being handled correctly in the
5723 outer ACL. Now, if condition failure induced by the nested "drop" causes
5724 the outer ACL verb to deny access ("accept" or "discard" after "endpass",
5725 or "require"), the connection is dropped.
5727 12. Similarly, "discard" in a nested ACL wasn't being handled. A nested ACL
5728 that yield "discard" can now be used with an "accept" or a "discard" verb,
5729 but an error is generated for any others (because I can't see a useful way
5730 to define what should happen).
5732 13. When an ACL is read dynamically from a file (or anywhere else), the lines
5733 are now processed in the same way as lines in the Exim configuration file.
5734 In particular, continuation lines are supported.
5736 14. Added the "dnslists = a.b.c!=n.n.n.n" feature.
5738 15. Added -ti meaning -t -i.
5740 16. Check for letters, digits, hyphens, and dots in the names of dnslist
5741 domains, and warn by logging if others are found.
5743 17. At least on BSD, alignment is not guarenteed for the array of ifreq's
5744 returned from GIFCONF when Exim is trying to find the list of interfaces on
5745 a host. The code in os.c has been modified to copy each ifreq to an aligned
5746 structure in all cases.
5748 Also, in some cases, the returned ifreq's were being copied to a 'struct
5749 ifreq' on the stack, which was subsequently passed to host_ntoa(). That
5750 means the last couple of bytes of an IPv6 address could be chopped if the
5751 ifreq contained only a normal sockaddr (14 bytes storage).
5753 18. Named domain lists were not supported in the hosts_treat_as_local option.
5754 An entry such as +xxxx was not recognized, and was treated as a literal
5757 19. Ensure that header lines added by a DATA ACL are included in the reject log
5758 if the ACL subsequently rejects the message.
5760 20. Upgrade the cramtest.pl utility script to use Digest::MD5 instead of just
5761 MD5 (which is deprecated).
5763 21. When testing a filter file using -bf, Exim was writing a message when it
5764 took the sender from a "From " line in the message, but it was not doing so
5765 when it took $return_path from a Return-Path: header line. It now does.
5767 22. If the contents of a "message" modifier for a "warn" ACL verb do not begin
5768 with a valid header line field name (a series of printing characters
5769 terminated by a colon, Exim now inserts X-ACL-Warn: at the beginning.
5771 23. Changed "disc" in the source to "disk" to conform to the documentation and
5772 the book and for uniformity.
5774 24. Ignore Sendmail's -Ooption=value command line item.
5776 25. When execve() failed while trying to run a command in a pipe transport,
5777 Exim was returning EX_UNAVAILBLE (69) from the subprocess. However, this
5778 could be confused with a return value of 69 from the command itself. This
5779 has been changed to 127, the value the shell returns if it is asked to run
5780 a non-existent command. The wording for the related log line suggests a
5781 non-existent command as the problem.
5783 26. If received_header_text expands to an empty string, do not add a Received:
5784 header line to the message. (Well, it adds a token one on the spool, but
5785 marks it "old" so that it doesn't get used or transmitted.)
5787 27. Installed eximstats 1.28 (addition of -nt option).
5789 28. There was no check for failure on the call to getsockname() in the daemon
5790 code. This can fail if there is a shortage of resources on the system, with
5791 ENOMEM, for example. A temporary error is now given on failure.
5793 29. Contrary to the C standard, it seems that in some environments, the
5794 equivalent of setlocale(LC_ALL, "C") is not obeyed at the start of a C
5795 program. Exim now does this explicitly; it affects the formatting of
5796 timestamps using strftime().
5798 30. If exiqsumm was given junk data, it threw up some uninitialized variable
5799 complaints. I've now initialized all the variables, to avoid this.
5801 32. Header lines added by a system filter were not being "seen" during
5802 transport-time rewrites.
5804 33. The info_callback() function passed to OpenSSL is set up with type void
5805 (*)(SSL *, int, int), as described somewhere. However, when calling the
5806 function (actually a macro) that sets it up, the type void(*)() is
5807 expected. I've put in a cast to prevent warnings from picky compilers.
5809 34. If a DNS black list lookup found a CNAME record, but there were no A
5810 records associated with the domain it pointed at, Exim crashed.
5812 35. If a DNS black list lookup returned more than one A record, Exim ignored
5813 all but the first. It now scans all returned addresses if a particular IP
5814 value is being sought. In this situation, the contents of the
5815 $dnslist_value variable are a list of all the addresses, separated by a
5818 36. Tightened up the rules for host name lookups using reverse DNS. Exim used
5819 to accept a host name and all its aliases if the forward lookup for any of
5820 them yielded the IP address of the incoming connection. Now it accepts only
5821 those names whose forward lookup yields the correct IP address. Any other
5822 names are discarded. This closes a loophole whereby a rogue DNS
5823 administrator could create reverse DNS records to break through a
5824 wildcarded host restriction in an ACL.
5826 37. If a user filter or a system filter that ran in a subprocess used any of
5827 the numerical variables ($1, $2 etc), or $thisaddress, in a pipe command,
5828 the wrong values were passed to the pipe command ($thisaddress had the
5829 value of $0, $0 had the value of $1, etc). This bug was introduced by
5830 change 4.11/101, and not discovered because I wrote an inadequate test. :-(
5832 38. Improved the line breaking for long SMTP error messages from ACLs.
5833 Previously, if there was no break point between 40 and 75 characters, Exim
5834 left the rest of the message alone. Two changes have been made: (a) I've
5835 reduced the minimum length to 35 characters; (b) if it can't find a break
5836 point between 35 and 75 characters, it looks ahead and uses the first one
5837 that it finds. This may give the occasional overlong line, but at least the
5838 remaining text gets split now.
5840 39. Change 82 of 4.11 was unimaginative. It assumed the limit on the number of
5841 file descriptors might be low, and that setting 1000 would always raise it.
5842 It turns out that in some environments, the limit is already over 1000 and
5843 that lowering it causes trouble. So now Exim takes care not to decrease it.
5845 40. When delivering a message, the value of $return_path is set to $sender_
5846 address at the start of routing (routers may change the value). By an
5847 oversight, this default was not being set up when an address was tested by
5848 -bt or -bv, which affected the outcome if any router or filter referred to
5851 41. The idea of the "warn" ACL verb is that it adds a header or writes to the
5852 log only when "message" or "log_message" are set. However, if one of the
5853 conditions was an address verification, or a call to a nested ACL, the
5854 messages generated by the underlying test were being passed through. This
5855 no longer happens. The underlying message is available in $acl_verify_
5856 message for both "message" and "log_message" expansions, so it can be
5857 passed through if needed.
5859 42. Added RFC 2047 interpretation of header lines for $h_ expansions, with a
5860 new expansion $bh_ to give the encoded byte string without charset
5861 translation. Translation happens only if iconv() is available; HAVE_ICONV
5862 indicates this at build time. HEADERS_CHARSET gives the charset to
5863 translate to; headers_charset can change it in the configuration, and
5864 "headers charset" can change it in an individual filter file.
5866 43. Now that we have a default RFC 2047 charset (see above), the code in Exim
5867 that creates RFC 2047 encoded "words" labels them as that charset instead
5868 of always using iso-8859-1. The cases are (i) the explicit ${rfc2047:
5869 expansion operator; (ii) when Exim creates a From: line for a local
5870 message; (iii) when a header line is rewritten to include a "phrase" part.
5872 44. Nasty bug in exiqsumm: the regex to skip already-delivered addresses was
5873 buggy, causing it to skip the first lines of messages whose message ID
5874 ended in 'D'. This would not have bitten before Exim release 4.14, because
5875 message IDs were unlikely to end in 'D' before then. The effect was to have
5876 incorrect size information for certain domains.
5878 45. #include "config.h" was missing at the start of the crypt16.c module. This
5879 caused trouble on Tru64 (aka OSF1) systems, because HAVE_CRYPT16 was not
5882 46. If there was a timeout during a "random" callout check, Exim treated it as
5883 a failure of the random address, and carried on sending RSET and the real
5884 address. If the delay was just some slowness somewhere, the response to the
5885 original RCPT would be taken as a response to RSET and so on, causing
5886 mayhem of various kinds.
5888 47. Change 50 for 4.20 was a heap of junk. I don't know what I was thinking
5889 when I implemented it. It didn't allow for the fact that some option values
5890 may legitimatetly be negative (e.g. size_addition), and it didn't even do
5891 the right test for positive values.
5893 48. Domain names in DNS records are case-independent. Exim always looks them up
5894 in lower case. Some resolvers return domain names in exactly the case they
5895 appear in the zone file, that is, they may contain uppercase letters. Not
5896 all resolvers do this - some return always lower case. Exim was treating a
5897 change of case by a resolver as a change of domain, similar to a widening
5898 of a domain abbreviation. This triggered its re-routing code and so it was
5899 trying to route what was effectively the same domain again. This normally
5900 caused routing to fail (because the router wouldn't handle the domain
5901 twice). Now Exim checks for this case specially, and just changes the
5902 casing of the domain that it ultimately uses when it transmits the message
5905 49. Added Sieve (RFC 3028) support, courtesy of Michael Haardt's contributed
5908 50. If a filter generated a file delivery with a non-absolute name (possible if
5909 no home directory exists for the router), the forbid_file option was not
5912 51. Added '&' feature to dnslists, to provide bit mask matching in addition to
5913 the existing equality matching.
5915 52. Exim was using ints instead of ino_t variables in some places where it was
5916 dealing with inode numbers.
5918 53. If TMPDIR is defined in Local/Makefile (default in src/EDITME is
5919 TMPDIR="/tmp"), Exim checks for the presence of an environment variable
5920 called TMPDIR, and if it finds it is different, it changes its value.
5922 54. The smtp_printf() function is now made available to local_scan() so
5923 additional output lines can be written before returning. There is also an
5924 smtp_fflush() function to enable the detection of a dropped connection.
5925 The variables smtp_input and smtp_batched_input are exported to
5928 55. Changed the default runtime configuration: the message "Unknown user"
5929 has been removed from the ACL, and instead placed on the localuser router,
5930 using the cannot_route_message feature. This means that any verification
5931 failures that generate their own messages won't get overridden. Similarly,
5932 the "Unrouteable address" message that was in the ACL for unverifiable
5933 relay addresses has also been removed.
5935 56. Added hosts_avoid_esmtp to the smtp transport.
5937 57. The exicyclog script was not checking for the esoteric option
5938 CONFIGURE_FILE_USE_EUID in the Local/Makefile. It now does this, but it
5939 will work only if exicyclog is run under the appropriate euid.
5941 58. Following a discussion on the list, the rules by which Exim recognises line
5942 endings on incoming messages have been changed. The -dropcr and drop_cr
5943 options are now no-ops, retained only for backwards compatibility. The
5944 following line terminators are recognized: LF CRLF CR. However, special
5945 processing applies to CR:
5947 (i) The sequence CR . CR does *not* terminate an incoming SMTP message,
5948 nor a local message in the state where . is a terminator.
5950 (ii) If a bare CR is encountered in a header line, an extra space is added
5951 after the line terminator so as not to end the header. The reasoning
5952 behind this is that bare CRs in header lines are most likely either
5953 to be mistakes, or people trying to play silly games.
5955 59. The size of a message, as listed by "-bp" or in the Exim monitor window,
5956 was being incorrectly given as 18 bytes larger than it should have been.
5957 This is a VOB (very old bug).
5959 60. This may never have affected anything current, but just in case it has:
5960 When the local host is found other than at the start of a list of hosts,
5961 the local host, those with the same MX, and any that follow, are discarded.
5962 When the list in question was part of a longer list of hosts, the following
5963 hosts (not currently being processed) were also being discarded. This no
5964 longer happens. I'm not sure if this situation could ever has previously
5967 61. Added the "/MX" feature to lists of hosts in the manualroute and query
5970 62. Whenever Exim generates a new message, it now adds an Auto-Submitted:
5971 header. This is something that is recommended in a new Internet Draft, and
5972 is something that is documented as being done by Sendmail. There are two
5973 possible values. For messages generated by the autoreply transport, Exim
5976 Auto-Submitted: auto-replied
5978 whereas for all other generated messages (e.g. bounces) it adds
5980 Auto-Submitted: auto-generated
5982 63. The "personal" condition in filters now includes a test for the
5983 Auto-Submitted: header. If it contains the string "auto-" the message it
5984 not considered personal.
5986 64. Added rcpt_include_affixes as a generic transport option.
5988 65. Added queue_only_override (default true).
5990 66. Added the syslog_duplication option.
5992 67. If what should have been the first header line of a message consisted of
5993 a space followed by a colon, Exim was mis-interpreting it as a header line.
5994 It isn't of course - it is syntactically invalid and should therefore be
5995 treated as the start of the message body. The misbehaviour could have
5996 caused a number of strange effects, including loss of data in subsequent
5997 header lines, and spool format errors.
5999 68. Formerly, the AUTH parameter on a MAIL command was trusted only if the
6000 client host had authenticated. This control can now be exercised by an ACL
6001 for more flexibility.
6003 69. By default, callouts do not happen when testing with -bh. There is now a
6004 variant, -bhc, which does actually run the callout code, including
6005 consulting and updating the callout cache.
6007 70. Added support for saslauthd authentication, courtesy of Alexander
6010 71. If statvfs() failed on the spool or log directories while checking their
6011 size for availability, Exim confusingly gave the error "space shortage".
6012 Furthermore, in debugging mode it crashed with a floating point exception.
6013 These checks are done if check_{spool,log}_{space,inodes} are set, and when
6014 an SMTP message arrives with SIZE= on the MAIL command. As this is a really
6015 serious problem, Exim now writes to the main and panic logs when this
6016 happens, with details of the failure. It then refuses to accept the
6017 incoming message, giving the message "spool directory problem" or "log
6018 directory problem" with a 421 code for SMTP messages.
6020 72. When Exim is about to re-exec itself, it ensures that the file descriptors
6021 0, 1, and 2 exist, because some OS complain for execs without them (see
6022 ChangeLog 4.05/30). If necessary, Exim opens /dev/null to use for these
6023 descriptors. However, the code omitted to check that the open succeeded,
6024 causing mysterious errors if for some reason the permissions on /dev/null
6025 got screwed. Now Exim writes a message to the main and panic logs, and
6026 bombs out if it can't open /dev/null.
6028 73. Re-vamped the way daemon_smtp_port, local_interfaces, and -oX work and
6029 interact so that it is all more flexible. It is supposed to remain
6030 backwards compatible. Also added extra_local_interfaces.
6032 74. Invalid data sent to a SPA (NTLM) server authenticator could cause the code
6033 to bomb out with an assertion failure - to the client this appears as a
6034 connection drop. This problem occurs in the part of the code that was taken
6035 from the Samba project. Fortunately, the assertion is in a very simple
6036 function, so I have fixed this by reproducing the function inline in the
6037 one place where it is called, and arranging for authentication to fail
6038 instead of killing the process with assert().
6040 75. The SPA client code was not working when the server requested OEM rather
6041 than Unicode encoding.
6043 76. Added code to make require_files with a specific uid setting more usable in
6044 the case where statting the file as root fails - usually a non-root-mounted
6045 NFS file system. When this happens and the failure is EACCES, Exim now
6046 forks a subprocess and does the per-uid checking as the relevant uid.
6048 77. Added process_log_path.
6050 78. If log_file_path was not explicitly set, a setting of check_log_space or
6051 check_log_inodes was ignored.
6053 79. If a space check for the spool or log partitions fails, the incident is now
6054 logged. Of course, in the latter case the data may get lost...
6056 80. Added the %p formatting code to string_format() so that it can be used to
6057 print addresses in debug_print(). Adjusted all the address printing in the
6058 debugging in store.c to use %p rather than %d.
6060 81. There was a concern that a line of code in smtp_in.c could overflow a
6061 buffer if a HELO/EHLO command was given followed by 500 or so spaces. As
6062 initially expressed, the concern was not well-founded, because trailing
6063 spaces are removed early. However, if the trailing spaces were followed by
6064 a NULL, they did not get removed, so the overflow was possible. Two fixes
6067 (a) I re-wrote the offending code in a cleaner fashion.
6068 (b) If an incoming SMTP command contains a NULL character, it is rejected
6071 82. When Exim changes uid/gid to the Exim user at daemon start time, it now
6072 runs initgroups(), so that if the Exim user is in any additional groups,
6073 they will be used during message reception.
6079 The change log for 4.20 and earlier releases has been archived.
projects / exim.git / blob