[exim.git] / doc / doc-txt / ChangeLog
1 Change log file for Exim from version 4.21
2 -------------------------------------------
4 Exim version 4.82
5 -----------------
7 PP/01 Add -bI: framework, and -bI:sieve for querying sieve capabilities.
9 PP/02 Make -n do something, by making it not do something.
10 When combined with -bP, the name of an option is not output.
12 PP/03 Added tls_dh_min_bits SMTP transport driver option, only honoured
13 by GnuTLS.
15 PP/04 First step towards DNSSEC, provide $sender_host_dnssec for
16 $sender_host_name and config options to manage this, and basic check
17 routines.
19 PP/05 DSCP support for outbound connections and control modifier for inbound.
21 PP/06 Cyrus SASL: set local and remote IP;port properties for driver.
22 (Only plugin which currently uses this is kerberos4, which nobody should
23 be using, but we should make it available and other future plugins might
24 conceivably use it, even though it would break NAT; stuff *should* be
25 using channel bindings instead).
27 PP/07 Handle "exim -L <tag>" to indicate to use syslog with tag as the process
28 name; added for Sendmail compatibility; requires admin caller.
29 Handle -G as equivalent to "control = suppress_local_fixups" (we used to
30 just ignore it); requires trusted caller.
31 Also parse but ignore: -Ac -Am -X<logfile>
32 Bugzilla 1117.
34 TL/01 Bugzilla 1258 - Refactor MAIL FROM optional args processing.
36 TL/02 Add +smtp_confirmation as a default logging option.
38 TL/03 Bugzilla 198 - Implement remove_header ACL modifier.
39 Patch by Magnus Holmgren from 2007-02-20.
41 TL/04 Bugzilla 1281 - Spec typo.
42 Bugzilla 1283 - Spec typo.
43 Bugzilla 1290 - Spec grammar fixes.
45 TL/05 Bugzilla 1285 - Spec omission, fix docbook errors for spec.txt creation.
47 JH/01 Bugzilla 1201 & 304 - New cutthrough-delivery feature, with TLS support.
49 JH/02 Support "G" suffix to numbers in ${if comparisons.
51 PP/08 Handle smtp transport tls_sni option forced-fail for OpenSSL.
53 NM/01 Bugzilla 1197 - Spec typo
54 Bugzilla 1196 - Spec examples corrections
56 JH/03 Add expansion operators ${listnamed:name} and ${listcount:string}
58 PP/09 Add gnutls_enable_pkcs11 option.
60 PP/10 Let Linux makefile inherit CFLAGS/CFLAGS_DYNAMIC.
61 Pulled from Debian 30_dontoverridecflags.dpatch by Andreas Metzler.
63 JH/04 Add expansion item ${acl {name}{arg}...}, expansion condition
64 "acl {{name}{arg}...}", and optional args on acl condition
65 "acl = name arg..."
67 JH/05 Permit multiple router/transport headers_add/remove lines.
69 JH/06 Add dnsdb pseudo-lookup "a+" to do an "aaaa" + "a" combination.
71 JH/07 Avoid using a waiting database for a single-message-only transport.
72 Performance patch from Paul Fisher. Bugzilla 1262.
74 JH/08 Strip leading/trailing newlines from add_header ACL modifier data.
75 Bugzilla 884.
77 JH/09 Add $headers_added variable, with content from use of ACL modifier
78 add_header (but not yet added to the message). Bugzilla 199.
80 JH/10 Add 8bitmime log_selector, for 8bitmime status on the received line.
81 Pulled from Bugzilla 817 by Wolfgang Breyha.
83 JH/11 Add $router_name and $transport_name variables. Bugzilla 308.
85 PP/11 SECURITY: protect DKIM DNS decoding from remote exploit.
86 CVE-2012-5671
88 JH/11 Add A= logging on delivery lines, and a client_set_id option on
89 authenticators.
91 JH/12 Add optional authenticated_sender logging to A= and a log_selector
92 for control.
94 PP/12 Unbreak server_set_id for NTLM/SPA auth, broken by 4.80 PP/29.
96 PP/13 Dovecot auth: log better reason to rejectlog if Dovecot did not
97 advertise SMTP AUTH mechanism to us, instead of a generic
98 protocol violation error. Also, make Exim more robust to bad
99 data from the Dovecot auth socket.
101 TF/01 Fix ultimate retry timeouts for intermittently deliverable recipients.
103 When a queue runner is handling a message, Exim first routes the
104 recipient addresses, during which it prunes them based on the retry
105 hints database. After that it attempts to deliver the message to
106 any remaining recipients. It then updates the hints database using
107 the retry rules.
109 So if a recipient address works intermittently, it can get repeatedly
110 deferred at routing time. The retry hints record remains fresh so the
111 address never reaches the final cutoff time.
113 This is a fairly common occurrence when a user is bumping up against
114 their storage quota. Exim had some logic in its local delivery code
115 to deal with this. However it did not apply to per-recipient defers
116 in remote deliveries, e.g. over LMTP to a separate IMAP message store.
118 This change adds a proper retry rule check during routing so that the
119 final cutoff time is checked against the message's age. We only do
120 this check if there is an address retry record and there is not a
121 domain retry record; this implies that previous attempts to handle
122 the address had the retry_use_local_parts option turned on. We use
123 this as an approximation for the destination being like a local
124 delivery, as in LMTP.
126 I suspect this new check makes the old local delivery cutoff check
127 redundant, but I have not verified this so I left the code in place.
129 TF/02 Correct gecos expansion when From: is a prefix of the username.
131 Test 0254 submits a message to Exim with the header
133 Resent-From: f
135 When I ran the test suite under the user fanf2, Exim expanded
136 the header to contain my full name, whereas it should have added
137 a Resent-Sender: header. It erroneously treats any prefix of the
138 username as equal to the username.
140 This change corrects that bug.
142 GF/01 DCC debug and logging tidyup
143 Error conditions log to paniclog rather than rejectlog.
144 Debug lines prefixed by "DCC: " to remove any ambiguity.
146 TF/03 Avoid unnecessary rebuilds of lookup-related code.
148 PP/14 Fix OCSP reinitialisation in SNI handling for Exim/TLS as server.
149 Bug spotted by Jeremy Harris; was flawed since initial commit.
150 Would have resulted in OCSP responses post-SNI triggering an Exim
151 NULL dereference and crash.
154 Exim version 4.80.1
155 -------------------
157 PP/01 SECURITY: protect DKIM DNS decoding from remote exploit.
158 CVE-2012-5671
159 This, or similar/improved, will also be change PP/11 of 4.82.
162 Exim version 4.80
163 -----------------
165 PP/01 Handle short writes when writing local log-files.
166 In practice, only affects FreeBSD (8 onwards).
167 Bugzilla 1053, with thanks to Dmitry Isaikin.
169 NM/01 Bugzilla 949 - Documentation tweak
171 NM/02 Bugzilla 1093 - eximstats DATA reject detection regexps
172 improved.
174 NM/03 Bugzilla 1169 - primary_hostname spelling was incorrect in docs.
176 PP/02 Implemented gsasl authenticator.
178 PP/03 Implemented heimdal_gssapi authenticator with "server_keytab" option.
180 PP/04 Local/Makefile support for (AUTH|LOOKUP)_*_PC=foo to use
181 `pkg-config foo` for cflags/libs.
183 PP/05 Swapped $auth1/$auth2 for gsasl GSSAPI mechanism, to be more consistent
184 with rest of GSASL and with heimdal_gssapi.
186 PP/06 Local/Makefile support for USE_(GNUTLS|OPENSSL)_PC=foo to use
187 `pkg-config foo` for cflags/libs for the TLS implementation.
189 PP/07 New expansion variable $tls_bits; Cyrus SASL server connection
190 properties get this fed in as external SSF. A number of robustness
191 and debugging improvements to the cyrus_sasl authenticator.
193 PP/08 cyrus_sasl server now expands the server_realm option.
195 PP/09 Bugzilla 1214 - Log authentication information in reject log.
196 Patch by Jeremy Harris.
198 PP/10 Added dbmjz lookup type.
200 PP/11 Let heimdal_gssapi authenticator take a SASL message without an authzid.
202 PP/12 MAIL args handles TAB as well as SP, for better interop with
203 non-compliant senders.
204 Analysis and variant patch by Todd Lyons.
206 NM/04 Bugzilla 1237 - fix cases where printf format usage not indicated
207 Bug report from Lars Müller <lars@samba.org> (via SUSE),
208 Patch from Dirk Mueller <dmueller@suse.com>
210 PP/13 tls_peerdn now print-escaped for spool files.
211 Observed some $tls_peerdn in wild which contained \n, which resulted
212 in spool file corruption.
214 PP/14 TLS fixes for OpenSSL: support TLS 1.1 & 1.2; new "openssl_options"
215 values; set SSL_MODE_AUTO_RETRY so that OpenSSL will retry a read
216 or write after TLS renegotiation, which otherwise led to messages
217 "Got SSL error 2".
219 TK/01 Bugzilla 1239 - fix DKIM verification when signature was not inserted
220 as a tracking header (ie: a signed header comes before the signature).
221 Patch from Wolfgang Breyha.
223 JH/01 Bugzilla 660 - Multi-valued attributes from ldap now parseable as a
224 comma-sep list; embedded commas doubled.
226 JH/02 Refactored ACL "verify =" logic to table-driven dispatch.
228 PP/15 LDAP: Check for errors of TLS initialisation, to give correct
229 diagnostics.
230 Report and patch from Dmitry Banschikov.
232 PP/16 Removed "dont_insert_empty_fragments" fron "openssl_options".
233 Removed SSL_clear() after SSL_new() which led to protocol negotiation
234 failures. We appear to now support TLS1.1+ with Exim.
236 PP/17 OpenSSL: new expansion var $tls_sni, which if used in tls_certificate
237 lets Exim select keys and certificates based upon TLS SNI from client.
238 Also option tls_sni on SMTP Transports. Also clear $tls_bits correctly
239 before an outbound SMTP session. New log_selector, +tls_sni.
241 PP/18 Bugzilla 1122 - check localhost_number expansion for failure, avoid
242 NULL dereference. Report and patch from Alun Jones.
244 PP/19 DNS resolver init changes for NetBSD compatibility. (Risk of breakage
245 on less well tested platforms). Obviates NetBSD pkgsrc patch-ac.
246 Not seeing resolver debug output on NetBSD, but suspect this is a
247 resolver implementation change.
249 PP/20 Revert part of NM/04, it broke log_path containing %D expansions.
250 Left warnings. Added "eximon gdb" invocation mode.
252 PP/21 Defaulting "accept_8bitmime" to true, not false.
254 PP/22 Added -bw for inetd wait mode support.
256 PP/23 Added PCRE_CONFIG=yes support to Makefile for using pcre-config to
257 locate the relevant includes and libraries. Made this the default.
259 PP/24 Fixed headers_only on smtp transports (was not sending trailing dot).
260 Bugzilla 1246, report and most of solution from Tomasz Kusy.
262 JH/03 ${eval } now uses 64-bit and supports a "g" suffix (like to "k" and "m").
263 This may cause build issues on older platforms.
265 PP/25 Revamped GnuTLS support, passing tls_require_ciphers to
266 gnutls_priority_init, ignoring Exim options gnutls_require_kx,
267 gnutls_require_mac & gnutls_require_protocols (no longer supported).
268 Added SNI support via GnuTLS too.
269 Made ${randint:..} supplier available, if using not-too-old GnuTLS.
271 PP/26 Added EXPERIMENTAL_OCSP for OpenSSL.
273 PP/27 Applied dnsdb SPF support patch from Janne Snabb.
274 Applied second patch from Janne, implementing suggestion to default
275 multiple-strings-in-record handling to match SPF spec.
277 JH/04 Added expansion variable $tod_epoch_l for a higher-precision time.
279 PP/28 Fix DCC dcc_header content corruption (stack memory referenced,
280 read-only, out of scope).
281 Patch from Wolfgang Breyha, report from Stuart Northfield.
283 PP/29 Fix three issues highlighted by clang analyser static analysis.
284 Only crash-plausible issue would require the Cambridge-specific
285 iplookup router and a misconfiguration.
286 Report from Marcin Mirosław.
288 PP/30 Another attempt to deal with PCRE_PRERELEASE, this one less buggy.
290 PP/31 %D in printf continues to cause issues (-Wformat=security), so for
291 now guard some of the printf checks behind WANT_DEEPER_PRINTF_CHECKS.
292 As part of this, removing so much warning spew let me fix some minor
293 real issues in debug logging.
295 PP/32 GnuTLS was always using default tls_require_ciphers, due to a missing
296 assignment on my part. Fixed.
298 PP/33 Added tls_dh_max_bits option, defaulting to current hard-coded limit
299 of NSS, for GnuTLS/NSS interop. Problem root cause diagnosis by
300 Janne Snabb (who went above and beyond: thank you).
302 PP/34 Validate tls_require_ciphers on startup, since debugging an invalid
303 string otherwise requires a connection and a bunch more work and it's
304 relatively easy to get wrong. Should also expose TLS library linkage
305 problems.
307 PP/35 Pull in <features.h> on Linux, for some portability edge-cases of
308 64-bit ${eval} (JH/03).
310 PP/36 Define _GNU_SOURCE in exim.h; it's needed for some releases of
311 GNU libc to support some of the 64-bit stuff, should not lead to
312 conflicts. Defined before os.h is pulled in, so if a given platform
313 needs to override this, it can.
315 PP/37 Unbreak Cyrus SASL auth: SSF retrieval was incorrect, Exim thought
316 protection layer was required, which is not implemented.
317 Bugzilla 1254, patch from Wolfgang Breyha.
319 PP/38 Overhaul DH prime handling, supply RFC-specified DH primes as built
320 into Exim, default to IKE id 23 from RFC 5114 (2048 bit). Make
321 tls_dhparam take prime identifiers. Also unbreak combination of
322 OpenSSL+DH_params+TLSSNI.
324 PP/39 Disable SSLv2 by default in OpenSSL support.
327 Exim version 4.77
328 -----------------
330 PP/01 Solaris build fix for Oracle's LDAP libraries.
331 Bugzilla 1109, patch from Stephen Usher.
333 TF/01 HP/UX build fix: avoid arithmetic on a void pointer.
335 TK/01 DKIM Verification: Fix relaxed canon for empty headers w/o
336 whitespace trailer
338 TF/02 Fix a couple more cases where we did not log the error message
339 when unlink() failed. See also change 4.74-TF/03.
341 TF/03 Make the exiwhat support code safe for signals. Previously Exim might
342 lock up or crash if it happened to be inside a call to libc when it
343 got a SIGUSR1 from exiwhat.
345 The SIGUSR1 handler appends the current process status to the process
346 log which is later printed by exiwhat. It used to use the general
347 purpose logging code to do this, but several functions it calls are
348 not safe for signals.
350 The new output code in the SIGUSR1 handler is specific to the process
351 log, and simple enough that it's easy to inspect for signal safety.
352 Removing some special cases also simplifies the general logging code.
353 Removing the spurious timestamps from the process log simplifies
354 exiwhat.
356 TF/04 Improved ratelimit ACL condition.
358 The /noupdate option has been deprecated in favour of /readonly which
359 has clearer semantics. The /leaky, /strict, and /readonly update modes
360 are mutually exclusive. The update mode is no longer included in the
361 database key; it just determines when the database is updated. (This
362 means that when you upgrde Exim will forget old rate measurements.)
364 Exim now checks that the per_* options are used with an update mode that
365 makes sense for the current ACL. For example, when Exim is processing a
366 message (e.g. acl_smtp_rcpt or acl_smtp_data, etc.) you can specify
367 per_mail/leaky or per_mail/strict; otherwise (e.g. in acl_smtp_helo) you
368 must specify per_mail/readonly. If you omit the update mode it defaults to
369 /leaky where that makes sense (as before) or /readonly where required.
371 The /noupdate option is now undocumented but still supported for
372 backwards compatibility. It is equivalent to /readonly except that in
373 ACLs where /readonly is required you may specify /leaky/noupdate or
374 /strict/noupdate which are treated the same as /readonly.
376 A useful new feature is the /count= option. This is a generalization
377 of the per_byte option, so that you can measure the throughput of other
378 aggregate values. For example, the per_byte option is now equivalent
379 to per_mail/count=${if >{0}{$message_size} {0} {$message_size} }.
381 The per_rcpt option has been generalized using the /count= mechanism
382 (though it's more complicated than the per_byte equivalence). When it is
383 used in acl_smtp_rcpt, the per_rcpt option adds recipients to the
384 measured rate one at a time; if it is used later (e.g. in acl_smtp_data)
385 or in a non-SMTP ACL it adds all the recipients in one go. (The latter
386 /count=$recipients_count behaviour used to work only in non-SMTP ACLs.)
387 Note that using per_rcpt with a non-readonly update mode in more than
388 one ACL will cause the recipients to be double-counted. (The per_mail
389 and per_byte options don't have this problem.)
391 The handling of very low rates has changed slightly. If the computed rate
392 is less than the event's count (usually one) then this event is the first
393 after a long gap. In this case the rate is set to the same as this event's
394 count, so that the first message of a spam run is counted properly.
396 The major new feature is a mechanism for counting the rate of unique
397 events. The new per_addr option counts the number of different
398 recipients that someone has sent messages to in the last time period. It
399 behaves like per_rcpt if all the recipient addresses are different, but
400 duplicate recipient addresses do not increase the measured rate. Like
401 the /count= option this is a general mechanism, so the per_addr option
402 is equivalent to per_rcpt/unique=$local_part@$domain. You can, for
403 example, measure the rate that a client uses different sender addresses
404 with the options per_mail/unique=$sender_address. There are further
405 details in the main documentation.
407 TF/05 Removed obsolete $Cambridge$ CVS revision strings.
409 TF/06 Removed a few PCRE remnants.
411 TF/07 Automatically extract Exim's version number from tags in the git
412 repository when doing development or release builds.
414 PP/02 Raise smtp_cmd_buffer_size to 16kB.
415 Bugzilla 879. Patch from Paul Fisher.
417 PP/03 Implement SSL-on-connect outbound with protocol=smtps on smtp transport.
418 Heavily based on revision 40f9a89a from Simon Arlott's tree.
419 Bugzilla 97.
421 PP/04 Use .dylib instead of .so for dynamic library loading on MacOS.
423 PP/05 Variable $av_failed, true if the AV scanner deferred.
424 Bugzilla 1078. Patch from John Horne.
426 PP/06 Stop make process more reliably on build failure.
427 Bugzilla 1087. Patch from Heiko Schlittermann.
429 PP/07 Make maildir_use_size_file an _expandable_ boolean.
430 Bugzilla 1089. Patch from Heiko Schlittermann.
432 PP/08 Handle ${run} returning more data than OS pipe buffer size.
433 Bugzilla 1131. Patch from Holger Weiß.
435 PP/09 Handle IPv6 addresses with SPF.
436 Bugzilla 860. Patch from Wolfgang Breyha.
438 PP/10 GnuTLS: support TLS 1.2 & 1.1.
439 Bugzilla 1156.
440 Use gnutls_certificate_verify_peers2() [patch from Andreas Metzler].
441 Bugzilla 1095.
443 PP/11 match_* no longer expand right-hand-side by default.
444 New compile-time build option, EXPAND_LISTMATCH_RHS.
445 New expansion conditions, "inlist", "inlisti".
447 PP/12 fix uninitialised greeting string from PP/03 (smtps client support).
449 PP/13 shell and compiler warnings fixes for RC1-RC4 changes.
451 PP/14 fix log_write() format string regression from TF/03.
452 Bugzilla 1152. Patch from Dmitry Isaikin.
455 Exim version 4.76
456 -----------------
458 PP/01 The new ldap_require_cert option would segfault if used. Fixed.
460 PP/02 Harmonised TLS library version reporting; only show if debugging.
461 Layout now matches that introduced for other libraries in 4.74 PP/03.
463 PP/03 New openssl_options items: no_sslv2 no_sslv3 no_ticket no_tlsv1
465 PP/04 New "dns_use_edns0" global option.
467 PP/05 Don't segfault on misconfiguration of ref:name exim-user as uid.
468 Bugzilla 1098.
470 PP/06 Extra paranoia around buffer usage at the STARTTLS transition.
471 nb: Exim is not vulnerable to http://www.kb.cert.org/vuls/id/555316
473 TK/01 Updated PolarSSL code to 0.14.2.
474 Bugzilla 1097. Patch from Andreas Metzler.
476 PP/07 Catch divide-by-zero in ${eval:...}.
477 Fixes bugzilla 1102.
479 PP/08 Condition negation of bool{}/bool_lax{} did not negate. Fixed.
480 Bugzilla 1104.
482 TK/02 Bugzilla 1106: CVE-2011-1764 - DKIM log line was subject to a
483 format-string attack -- SECURITY: remote arbitrary code execution.
485 TK/03 SECURITY - DKIM signature header parsing was double-expanded, second
486 time unintentionally subject to list matching rules, letting the header
487 cause arbitrary Exim lookups (of items which can occur in lists, *not*
488 arbitrary string expansion). This allowed for information disclosure.
490 PP/09 Fix another SIGFPE (x86) in ${eval:...} expansion, this time related to
491 INT_MIN/-1 -- value coerced to INT_MAX.
494 Exim version 4.75
495 -----------------
497 NM/01 Workround for PCRE version dependency in version reporting
498 Bugzilla 1073
500 TF/01 Update valgrind.h and memcheck.h to copies from valgrind-3.6.0.
501 This fixes portability to compilers other than gcc, notably
502 Solaris CC and HP-UX CC. Fixes Bugzilla 1050.
504 TF/02 Bugzilla 139: Avoid using the += operator in the modular lookup
505 makefiles for portability to HP-UX and POSIX correctness.
507 PP/01 Permit LOOKUP_foo enabling on the make command-line.
508 Also via indented variable definition in the Makefile.
509 (Debugging by Oliver Heesakkers).
511 PP/02 Restore caching of spamd results with expanded spamd_address.
512 Patch from author of expandable spamd_address patch, Wolfgang Breyha.
514 PP/03 Build issue: lookups-Makefile now exports LC_ALL=C
515 Improves build reliability. Fix from: Frank Elsner
517 NM/02 Fix wide character breakage in the rfc2047 coding
518 Fixes bug 1064. Patch from Andrey N. Oktyabrski
520 NM/03 Allow underscore in dnslist lookups
521 Fixes bug 1026. Patch from Graeme Fowler
523 PP/04 Bugzilla 230: Support TLS-enabled LDAP (in addition to ldaps).
524 Code patches from Adam Ciarcinski of NetBSD.
526 NM/04 Fixed exiqgrep to cope with mailq missing size issue
527 Fixes bug 943.
529 PP/05 Bugzilla 1083: when lookup expansion defers, escape the output which
530 is logged, to avoid truncation. Patch from John Horne.
532 PP/06 Bugzilla 1042: implement freeze_signal on pipe transports.
533 Patch from Jakob Hirsch.
535 PP/07 Bugzilla 1061: restrict error messages sent over SMTP to not reveal
536 SQL string expansion failure details.
537 Patch from Andrey Oktyabrski.
539 PP/08 Bugzilla 486: implement %M datestamping in log filenames.
540 Patch from Simon Arlott.
542 PP/09 New lookups functionality failed to compile on old gcc which rejects
543 extern declarations in function scope.
544 Patch from Oliver Fleischmann
546 PP/10 Use sig_atomic_t for flags set from signal handlers.
547 Check getgroups() return and improve debugging.
548 Fixed developed for diagnosis in bug 927 (which turned out to be
549 a kernel bug).
551 PP/11 Bugzilla 1055: Update $message_linecount for maildir_tag.
552 Patch from Mark Zealey.
554 PP/12 Bugzilla 1056: Improved spamd server selection.
555 Patch from Mark Zealey.
557 PP/13 Bugzilla 1086: Deal with maildir quota file races.
558 Based on patch from Heiko Schlittermann.
560 PP/14 Bugzilla 1019: DKIM multiple signature generation fix.
561 Patch from Uwe Doering, sign-off by Michael Haardt.
563 NM/05 Fix to spam.c to accommodate older gcc versions which dislike
564 variable declaration deep within a block. Bug and patch from
565 Dennis Davis.
567 PP/15 lookups-Makefile IRIX compatibilty coercion.
569 PP/16 Make DISABLE_DKIM build knob functional.
571 NM/06 Bugzilla 968: child_open_uid: restore default SIGPIPE handler
572 Patch by Simon Arlott
574 TF/03 Fix valgrind.h portability to C89 compilers that do not support
575 variable argument macros. Our copy now differs from upstream.
578 Exim version 4.74
579 -----------------
581 TF/01 Failure to get a lock on a hints database can have serious
582 consequences so log it to the panic log.
584 TF/02 Log LMTP confirmation messages in the same way as SMTP,
585 controlled using the smtp_confirmation log selector.
587 TF/03 Include the error message when we fail to unlink a spool file.
589 DW/01 Bugzilla 139: Support dynamically loaded lookups as modules.
590 With thanks to Steve Haslam, Johannes Berg & Serge Demonchaux
591 for maintaining out-of-tree patches for some time.
593 PP/01 Bugzilla 139: Documentation and portability issues.
594 Avoid GNU Makefile-isms, let Exim continue to build on BSD.
595 Handle per-OS dynamic-module compilation flags.
597 PP/02 Let /dev/null have normal permissions.
598 The 4.73 fixes were a little too stringent and complained about the
599 permissions on /dev/null. Exempt it from some checks.
600 Reported by Andreas M. Kirchwitz.
602 PP/03 Report version information for many libraries, including
603 Exim version information for dynamically loaded libraries. Created
604 version.h, now support a version extension string for distributors
605 who patch heavily. Dynamic module ABI change.
607 PP/04 CVE-2011-0017 - check return value of setuid/setgid. This is a
608 privilege escalation vulnerability whereby the Exim run-time user
609 can cause root to append content of the attacker's choosing to
610 arbitrary files.
612 PP/05 Bugzilla 1041: merged DCC maintainer's fixes for return code.
613 (Wolfgang Breyha)
615 PP/06 Bugzilla 1071: fix delivery logging with untrusted macros.
616 If dropping privileges for untrusted macros, we disabled normal logging
617 on the basis that it would fail; for the Exim run-time user, this is not
618 the case, and it resulted in successful deliveries going unlogged.
619 Fixed. Reported by Andreas Metzler.
622 Exim version 4.73
623 -----------------
625 PP/01 Date: & Message-Id: revert to normally being appended to a message,
626 only prepend for the Resent-* case. Fixes regression introduced in
627 Exim 4.70 by NM/22 for Bugzilla 607.
629 PP/02 Include check_rfc2047_length in configure.default because we're seeing
630 increasing numbers of administrators be bitten by this.
632 JJ/01 Added DISABLE_DKIM and comment to src/EDITME
634 PP/03 Bugzilla 994: added openssl_options main configuration option.
636 PP/04 Bugzilla 995: provide better SSL diagnostics on failed reads.
638 PP/05 Bugzilla 834: provide a permit_coredump option for pipe transports.
640 PP/06 Adjust NTLM authentication to handle SASL Initial Response.
642 PP/07 If TLS negotiated an anonymous cipher, we could end up with SSL but
643 without a peer certificate, leading to a segfault because of an
644 assumption that peers always have certificates. Be a little more
645 paranoid. Problem reported by Martin Tscholak.
647 PP/08 Bugzilla 926: switch ClamAV to use the new zINSTREAM API for content
648 filtering; old API available if built with WITH_OLD_CLAMAV_STREAM=yes
649 NB: ClamAV planning to remove STREAM in "middle of 2010".
650 CL also introduces -bmalware, various -d+acl logging additions and
651 more caution in buffer sizes.
653 PP/09 Implemented reverse_ip expansion operator.
655 PP/10 Bugzilla 937: provide a "debug" ACL control.
657 PP/11 Bugzilla 922: Documentation dusting, patch provided by John Horne.
659 PP/12 Bugzilla 973: Implement --version.
661 PP/13 Bugzilla 752: Refuse to build/run if Exim user is root/0.
663 PP/14 Build without WITH_CONTENT_SCAN. Path from Andreas Metzler.
665 PP/15 Bugzilla 816: support multiple condition rules on Routers.
667 PP/16 Add bool_lax{} expansion operator and use that for combining multiple
668 condition rules, instead of bool{}. Make both bool{} and bool_lax{}
669 ignore trailing whitespace.
671 JJ/02 prevent non-panic DKIM error from being sent to paniclog
673 JJ/03 added tcp_wrappers_daemon_name to allow host entries other than
674 "exim" to be used
676 PP/17 Fix malware regression for cmdline scanner introduced in PP/08.
677 Notification from Dr Andrew Aitchison.
679 PP/18 Change ClamAV response parsing to be more robust and to handle ClamAV's
680 ExtendedDetectionInfo response format.
681 Notification from John Horne.
683 PP/19 OpenSSL 1.0.0a compatibility const-ness change, should be backwards
684 compatible.
686 PP/20 Added a CONTRIBUTING file. Fixed the documentation build to use http:
687 XSL and documented dependency on system catalogs, with examples of how
688 it normally works.
690 DW/21 Added Valgrind hooks in store.c to help it capture out-of-bounds store
691 access.
693 DW/22 Bugzilla 1044: CVE-2010-4345 - partial fix: restrict default behaviour
694 of CONFIGURE_OWNER and CONFIGURE_GROUP options to no longer allow a
695 configuration file which is writeable by the Exim user or group.
697 DW/23 Bugzilla 1044: CVE-2010-4345 - part two: extend checks for writeability
698 of configuration files to cover files specified with the -C option if
699 they are going to be used with root privileges, not just the default
700 configuration file.
702 DW/24 Bugzilla 1044: CVE-2010-4345 - part three: remove ALT_CONFIG_ROOT_ONLY
703 option (effectively making it always true).
705 DW/25 Add TRUSTED_CONFIG_PREFIX_FILE option to allow alternative configuration
706 files to be used while preserving root privileges.
708 DW/26 Set FD_CLOEXEC on SMTP sockets after forking in the daemon, to ensure
709 that rogue child processes cannot use them.
711 PP/27 Bugzilla 1047: change the default for system_filter_user to be the Exim
712 run-time user, instead of root.
714 PP/28 Add WHITELIST_D_MACROS option to let some macros be overridden by the
715 Exim run-time user without dropping privileges.
717 DW/29 Remove use of va_copy() which breaks pre-C99 systems. Duplicate the
718 result string, instead of calling string_vformat() twice with the same
719 arguments.
722 for other users. Others should always drop root privileges if they use
723 -C on the command line, even for a whitelisted configure file.
727 NM/01 Fixed bug #1002 - Message loss when using multiple deliveries
730 Exim version 4.72
731 -----------------
733 JJ/01 installed exipick 20100104.1, adding $max_received_linelength,
734 $data_path, and $header_path variables; fixed documentation bugs and
735 typos
737 JJ/02 installed exipick 20100222.0, added --input-dir and --finput to allow
738 exipick to access non-standard spools, including the "frozen" queue
739 (Finput)
741 NM/01 Bugzilla 965: Support mysql stored procedures.
742 Patch from Alain Williams
744 NM/02 Bugzilla 961: Spacing fix (syntax error) on Makefile directives for NetBSD
746 NM/03 Bugzilla 955: Documentation fix for max_rcpts.
747 Patch from Andreas Metzler
749 NM/04 Bugzilla 954: Fix for unknown responses from Dovecot authenticator.
750 Patch from Kirill Miazine
752 NM/05 Bugzilla 671: Added umask to procmail example.
754 JJ/03 installed exipick 20100323.0, fixing doc bug
756 NM/06 Bugzilla 988: CVE-2010-2023 - prevent hardlink attack on sticky mail
757 directory. Notification and patch from Dan Rosenberg.
759 TK/01 PDKIM: Upgrade PolarSSL files to upstream version 0.12.1.
761 TK/02 Improve log output when DKIM signing operation fails.
763 MH/01 Treat the transport option dkim_domain as a colon separated
764 list, not as a single string, and sign the message with each element,
765 omitting multiple occurences of the same signer.
767 NM/07 Null terminate DKIM strings, Null initialise DKIM variable
768 Bugzilla 985, 986. Patch by Simon Arlott
770 NM/08 Bugzilla 967. dnsdb DNS TXT record bug fix (DKIM-related)
771 Patch by Simon Arlott
773 PP/01 Bugzilla 989: CVE-2010-2024 - work round race condition on
774 MBX locking. Notification from Dan Rosenberg.
777 Exim version 4.71
778 -----------------
780 TK/01 Bugzilla 912: Fix DKIM segfault on empty headers/body.
782 NM/01 Bugzilla 913: Documentation fix for gnutls_* options.
784 NM/02 Bugzilla 722: Documentation for randint. Better randomness defaults.
786 NM/03 Bugzilla 847: Enable DNSDB lookup by default.
788 NM/04 Bugzilla 915: Flag broken perl installation during build.
791 Exim version 4.70
792 -----------------
794 TK/01 Added patch by Johannes Berg that expands the main option
795 "spamd_address" if it starts with a dollar sign.
797 TK/02 Write list of recipients to X-Envelope-Sender header when building
798 the mbox-format spool file for content scanning (suggested by Jakob
799 Hirsch).
801 TK/03 Added patch by Wolfgang Breyha that adds experimental DCC
802 (http://www.dcc-servers.net/) support via dccifd. Activated by
803 setting EXPERIMENTAL_DCC=yes in Local/Makefile.
805 TK/04 Bugzilla 673: Add f-protd malware scanner support. Patch submitted
806 by Mark Daniel Reidel <mr@df.eu>.
808 NM/01 Bugzilla 657: Embedded PCRE removed from the exim source tree.
809 When building exim an external PCRE library is now needed -
810 PCRE is a system library on the majority of modern systems.
811 See entry on PCRE_LIBS in EDITME file.
813 NM/02 Bugzilla 646: Removed unwanted C/R in Dovecot authenticator
814 conversation. Added nologin parameter to request.
815 Patch contributed by Kirill Miazine.
817 TF/01 Do not log submission mode rewrites if they do not change the address.
819 TF/02 Bugzilla 662: Fix stack corruption before exec() in daemon.c.
821 NM/03 Bugzilla 602: exicyclog now handles panic log, and creates empty
822 log files in place. Contributed by Roberto Lima.
824 NM/04 Bugzilla 667: Close socket used by dovecot authenticator.
826 TF/03 Bugzilla 615: When checking the local_parts router precondition
827 after a local_part_suffix or local_part_prefix option, Exim now
828 does not use the address's named list lookup cache, since this
829 contains cached lookups for the whole local part.
831 NM/05 Bugzilla 521: Integrated SPF Best Guess support contributed by
832 Robert Millan. Documentation is in experimental-spec.txt.
834 TF/04 Bugzilla 668: Fix parallel build (make -j).
836 NM/05.2 Bugzilla 437: Prevent Maildir aux files being created with mode 000.
838 NM/05.3 Bugzilla 598: Improvement to Dovecot authenticator handling.
839 Patch provided by Jan Srzednicki.
841 TF/05 Leading white space used to be stripped from $spam_report which
842 wrecked the formatting. Now it is preserved.
844 TF/06 Save $spam_score, $spam_bar, and $spam_report in spool files, so
845 that they are available at delivery time.
847 TF/07 Fix the way ${extract is skipped in the untaken branch of a conditional.
849 TF/08 TLS error reporting now respects the incoming_interface and
850 incoming_port log selectors.
852 TF/09 Produce a more useful error message if an SMTP transport's hosts
853 setting expands to an empty string.
855 NM/06 Bugzilla 744: EXPN did not work under TLS.
856 Patch provided by Phil Pennock.
858 NM/07 Bugzilla 769: Extraneous comma in usage fprintf
859 Patch provided by Richard Godbee.
861 NM/08 Fixed erroneous documentation references to smtp_notquit_acl to be
862 acl_smtp_notquit, added index entry.
864 NM/09 Bugzilla 787: Potential buffer overflow in string_format.
865 Patch provided by Eugene Bujak.
867 NM/10 Bugzilla 770: Problem on some platforms modifying the len parameter to
868 accept(). Patch provided by Maxim Dounin.
870 NM/11 Bugzilla 749: Preserve old behaviour of blanks comparing equal to zero.
871 Patch provided by Phil Pennock.
873 NM/12 Bugzilla 497: Correct behaviour of exiwhat when no config exists.
875 NM/13 Bugzilla 590: Correct handling of Resent-Date headers.
876 Patch provided by Brad "anomie" Jorsch.
878 NM/14 Bugzilla 622: Added timeout setting to transport filter.
879 Patch provided by Dean Brooks.
881 TK/05 Add native DKIM support (does not depend on external libraries).
883 NM/15 Bugzilla 854: Removed code that symlinks to pcre as its no longer useful.
884 Patch provided by Graeme Fowler.
886 NM/16 Bugzilla 851: Documentation example syntax fix.
888 NM/17 Changed NOTICE file to remove references to embedded PCRE.
890 NM/18 Bugzilla 894: Fix issue with very long lines including comments in
891 lsearch.
893 NM/19 Bugzilla 745: TLS version reporting.
894 Patch provided by Phil Pennock.
896 NM/20 Bugzilla 167: bool: condition support.
897 Patch provided by Phil Pennock.
899 NM/21 Bugzilla 665: gnutls_compat_mode to allow compatibility with broken
900 clients. Patch provided by Phil Pennock.
902 NM/22 Bugzilla 607: prepend (not append) Resent-Message-ID and Resent-Date.
903 Patch provided by Brad "anomie" Jorsch.
905 NM/23 Bugzilla 687: Fix misparses in eximstats.
906 Patch provided by Heiko Schlittermann.
908 NM/24 Bugzilla 688: Fix exiwhat to handle log_selector = +pid.
909 Patch provided by Heiko Schlittermann.
911 NM/25 Bugzilla 727: Use transport mode as default mode for maildirsize file.
912 plus update to original patch.
914 NM/26 Bugzilla 799: Documentation correction for ratelimit.
916 NM/27 Bugzilla 802: Improvements to local interface IP addr detection.
917 Patch provided by David Brownlee.
919 NM/28 Bugzilla 807: Improvements to LMTP delivery logging.
921 NM/29 Bugzilla 862, 866, 875: Documentation bugfixes.
923 NM/30 Bugzilla 888: TLS documentation bugfixes.
925 NM/31 Bugzilla 896: Dovecot buffer overrun fix.
927 NM/32 Bugzilla 889: Change all instances of "expr" in shell scripts to "expr --"
928 Unlike the original bugzilla I have changed all shell scripts in src tree.
930 NM/33 Bugzilla 898: Transport filter timeout fix.
931 Patch by Todd Rinaldo.
933 NM/34 Bugzilla 901: Fix sign/unsigned and UTF mismatches.
934 Patch by Serge Demonchaux.
936 NM/35 Bugzilla 39: Base64 decode bug fixes.
937 Patch by Jakob Hirsch.
939 NM/36 Bugzilla 909: Correct connect() call in dcc code.
941 NM/37 Bugzilla 910: Correct issue with relaxed/simple handling.
943 NM/38 Bugzilla 908: Removed NetBSD3 support as no longer needed.
945 NM/39 Bugzilla 911: Fixed MakeLinks build script.
948 Exim version 4.69
949 -----------------
951 TK/01 Add preliminary DKIM support. Currently requires a forked version of
952 ALT-N's libdkim that I have put here:
953 http://duncanthrax.net/exim-experimental/
955 Note to Michael Haardt: I had to rename some vars in sieve.c. They
956 were called 'true' and it seems that C99 defines that as a reserved
957 keyword to be used with 'bool' variable types. That means you could
958 not include C99-style headers which use bools without triggering
959 build errors in sieve.c.
961 NM/01 Bugzilla 592: --help option is handled incorrectly if exim is invoked
962 as mailq or other aliases. Changed the --help handling significantly
963 to do whats expected. exim_usage() emits usage/help information.
965 SC/01 Added the -bylocaldomain option to eximstats.
967 NM/02 Bugzilla 619: Defended against bad data coming back from gethostbyaddr.
969 NM/03 Bugzilla 613: Documentation fix for acl_not_smtp.
971 NM/04 Bugzilla 628: PCRE update to 7.4 (work done by John Hall).
974 Exim version 4.68
975 -----------------
977 PH/01 Another patch from the Sieve maintainer.
979 PH/02 When an IPv6 address is converted to a string for single-key lookup
980 in an address list (e.g. for an item such as "net24-dbm;/net/works"),
981 dots are used instead of colons so that keys in lsearch files need not
982 contain colons. This was done some time before quoting was made available
983 in lsearch files. However, iplsearch files do require colons in IPv6 keys
984 (notated using the quote facility) so as to distinguish them from IPv4
985 keys. This meant that lookups for IP addresses in host lists did not work
986 for iplsearch lookups.
988 This has been fixed by arranging for IPv6 addresses to be expressed with
989 colons if the lookup type is iplsearch. This is not incompatible, because
990 previously such lookups could never work.
992 The situation is now rather anomolous, since one *can* have colons in
993 ordinary lsearch keys. However, making the change in all cases is
994 incompatible and would probably break a number of configurations.
996 TK/01 Change PRVS address formatting scheme to reflect latests BATV draft
997 version.
999 MH/01 The "spam" ACL condition code contained a sscanf() call with a %s
1000 conversion specification without a maximum field width, thereby enabling
1001 a rogue spamd server to cause a buffer overflow. While nobody in their
1002 right mind would setup Exim to query an untrusted spamd server, an
1003 attacker that gains access to a server running spamd could potentially
1004 exploit this vulnerability to run arbitrary code as the Exim user.
1006 TK/02 Bugzilla 502: Apply patch to make the SPF-Received: header use
1007 $primary_hostname instead of what libspf2 thinks the hosts name is.
1009 MH/02 The dsearch lookup now uses lstat(2) instead of stat(2) to look for
1010 a directory entry by the name of the lookup key. Previously, if a
1011 symlink pointed to a non-existing file or a file in a directory that
1012 Exim lacked permissions to read, a lookup for a key matching that
1013 symlink would fail. Now it is enough that a matching directory entry
1014 exists, symlink or not. (Bugzilla 503.)
1016 PH/03 The body_linecount and body_zerocount variables are now exported in the
1017 local_scan API.
1019 PH/04 Added the $dnslist_matched variable.
1021 PH/05 Unset $tls_cipher and $tls_peerdn before making a connection as a client.
1022 This means they are set thereafter only if the connection becomes
1023 encrypted.
1025 PH/06 Added the client_condition to authenticators so that some can be skipped
1026 by clients under certain conditions.
1028 PH/07 The error message for a badly-placed control=no_multiline_responses left
1029 "_responses" off the end of the name.
1031 PH/08 Added -Mvc to output a copy of a message in RFC 2822 format.
1033 PH/09 Tidied the code for creating ratelimiting keys, creating them explicitly
1034 (without spaces) instead of just copying the configuration text.
1036 PH/10 Added the /noupdate option to the ratelimit ACL condition.
1038 PH/11 Added $max_received_linelength.
1040 PH/12 Added +ignore_defer and +include_defer to host lists.
1042 PH/13 Installed PCRE version 7.2. This needed some changes because of the new
1043 way in which PCRE > 7.0 is built.
1045 PH/14 Implemented queue_only_load_latch.
1047 PH/15 Removed an incorrect (int) cast when reading the value of SIZE in a
1048 MAIL command. The effect was to mangle the value on 64-bit systems.
1050 PH/16 Another patch from the Sieve maintainer.
1052 PH/17 Added the NOTQUIT ACL, based on a patch from Ted Cooper.
1054 PH/18 If a system quota error occurred while trying to create the file for
1055 a maildir delivery, the message "Mailbox is full" was not appended to the
1056 bounce if the delivery eventually timed out. Change 4.67/27 below applied
1057 only to a quota excession during the actual writing of the file.
1059 PH/19 It seems that peer DN values may contain newlines (and other non-printing
1060 characters?) which causes problems in log lines. The DN values are now
1061 passed through string_printing() before being added to log lines.
1063 PH/20 Added the "servers=" facility to MySQL and PostgreSQL lookups. (Oracle
1064 and InterBase are left for another time.)
1066 PH/21 Added message_body_newlines option.
1068 PH/22 Guard against possible overflow in moan_check_errorcopy().
1070 PH/23 POSIX allows open() to be a macro; guard against that.
1072 PH/24 If the recipient of an error message contained an @ in the local part
1073 (suitably quoted, of course), incorrect values were put in $domain and
1074 $local_part during the evaluation of errors_copy.
1077 Exim version 4.67
1078 -----------------
1080 MH/01 Fix for bug #448, segfault in Dovecot authenticator when interface_address
1081 is unset (happens when testing with -bh and -oMi isn't used). Thanks to
1082 Jan Srzednicki.
1084 PH/01 Added a new log selector smtp_no_mail, to log SMTP sessions that do not
1085 issue a MAIL command.
1087 PH/02 In an ACL statement such as
1089 deny dnslists = X!= : X=
1091 if a client was not listed at all, or was listed with a value other than
1092, in the X list, but was listed with in the Y list,
1093 the condition was not true (as it should be), so access was not denied.
1094 The bug was that the ! inversion was incorrectly passed on to the second
1095 item. This has been fixed.
1097 PH/03 Added additional dnslists conditions == and =& which are different from
1098 = and & when the dns lookup returns more than one IP address.
1100 PH/04 Added gnutls_require_{kx,mac,protocols} to give more control over the
1101 cipher suites used by GnuTLS. These options are ignored by OpenSSL.
1103 PH/05 After discussion on the list, added a compile time option ENABLE_DISABLE_
1104 FSYNC, which compiles an option called disable_fsync that allows for
1105 bypassing fsync(). The documentation is heavily laced with warnings.
1107 SC/01 Updated eximstats to collate all SpamAssassin rejects into one bucket.
1109 PH/06 Some tidies to the infrastructure of the Test Suite that is concerned
1110 with the auxiliary C programs that it uses: (1) Arrange for BIND_8_COMPAT
1111 to be defined when compiling on OSX (Darwin); (2) Tidies to the Makefile,
1112 including adding "make clean"; (3) Added -fPIC when compiling the test
1113 dynamically loaded module, to get rid of a warning.
1115 MH/02 Fix for bug #451, causing paniclog entries to be written if a bounce
1116 message fails, move_frozen_messages = true and ignore_bounce_errors_after
1117 = 0s. The bug is otherwise harmless.
1119 PH/07 There was a bug in the dovecot authenticator such that the value of
1120 $auth1 could be overwritten, and so not correctly preserved, after a
1121 successful authentication. This usually meant that the value preserved by
1122 the server_setid option was incorrect.
1124 PH/08 Added $smtp_count_at_connection_start, deliberately with a long name.
1126 PH/09 Installed PCRE release 7.0.
1128 PH/10 The acl_not_smtp_start ACL was, contrary to the documentation, not being
1129 run for batched SMTP input. It is now run at the start of every message
1130 in the batch. While fixing this I discovered that the process information
1131 (output by running exiwhat) was not always getting set for -bs and -bS
1132 input. This is fixed, and it now also says "batched" for BSMTP.
1134 PH/11 Added control=no_pipelining.
1136 PH/12 Added $sending_ip_address and $sending_port (mostly Magnus Holmgren's
1137 patch, slightly modified), and move the expansion of helo_data till after
1138 the connection is made in the smtp transport (so it can use these
1139 values).
1141 PH/13 Added ${rfc2047d: to decoded RFC 2047 strings.
1143 PH/14 Added log_selector = +pid.
1145 PH/15 Flush SMTP output before delaying, unless control=no_delay_flush is set.
1147 PH/16 Add ${if forany and ${if forall.
1149 PH/17 Added dsn_from option to vary the From: line in DSNs.
1151 PH/18 Flush SMTP output before performing a callout, unless control =
1152 no_callout_flush is set.
1154 PH/19 Change 4.64/PH/36 introduced a bug: when address_retry_include_sender
1155 was true (the default) a successful delivery failed to delete the retry
1156 item, thus causing premature timeout of the address. The bug is now
1157 fixed.
1159 PH/20 Added hosts_avoid_pipelining to the smtp transport.
1161 PH/21 Long custom messages for fakedefer and fakereject are now split up
1162 into multiline reponses in the same way that messages for "deny" and
1163 other ACL rejections are.
1165 PH/22 Applied Jori Hamalainen's speed-up changes and typo fixes to exigrep,
1166 with slight modification.
1168 PH/23 Applied sieve patches from the maintainer "tracking the latest notify
1169 draft, changing the syntax and factoring some duplicate code".
1171 PH/24 When the log selector "outgoing_port" was set, the port was shown as -1
1172 for deliveries of the second and subsequent messages over the same SMTP
1173 connection.
1175 PH/25 Applied Magnus Holmgren's patch for ${addresses, ${map, ${filter, and
1176 ${reduce, with only minor "tidies".
1178 SC/02 Applied Daniel Tiefnig's patch to improve the '($parent) =' pattern match.
1180 PH/26 Added a "continue" ACL modifier that does nothing, for the benefit of its
1181 expansion side effects.
1183 PH/27 When a message times out after an over-quota error from an Exim-imposed
1184 quota, the bounce message says "mailbox is full". This message was not
1185 being given when it was a system quota that was exceeded. It now should
1186 be the same.
1188 MH/03 Made $recipients available in local_scan(). local_scan() already has
1189 better access to the recipient list through recipients_list[], but
1190 $recipients can be useful in postmaster-provided expansion strings.
1192 PH/28 The $smtp_command and $smtp_command_argument variables were not correct
1193 in the case of a MAIL command with additional options following the
1194 address, for example: MAIL FROM:<foo@bar> SIZE=1234. The option settings
1195 were accidentally chopped off.
1197 PH/29 SMTP synchronization checks are implemented when a command is read -
1198 there is a check that no more input is waiting when there shouldn't be
1199 any. However, for some commands, a delay in an ACL can mean that it is
1200 some time before the response is written. In this time, more input might
1201 arrive, invalidly. So now there are extra checks after an ACL has run for
1202 HELO/EHLO and after the predata ACL, and likewise for MAIL and RCPT when
1203 pipelining has not been advertised.
1205 PH/30 MH's patch to allow iscntrl() characters to be list separators.
1207 PH/31 Unlike :fail:, a custom message specified with :defer: was not being
1208 returned in the SMTP response when smtp_return_error_details was false.
1209 This has been fixed.
1211 PH/32 Change the Dovecot authenticator to use read() and write() on the socket
1212 instead of the C I/O that was originally supplied, because problems were
1213 reported on Solaris.
1215 PH/33 Compile failed with OpenSSL 0.9.8e. This was due to a coding error in
1216 Exim which did not show up earlier: it was assuming that a call to
1217 SSL_CTX_set_info_callback() might give an error value. In fact, there is
1218 no error. In previous releases of OpenSSL, SSL_CTX_set_info_callback()
1219 was a macro that became an assignment, so it seemed to work. This has
1220 changed to a proper function call with a void return, hence the compile
1221 error. Exim's code has been fixed.
1223 PH/34 Change HDA_SIZE in oracle.c from 256 to 512. This is needed for 64-bit
1224 cpus.
1226 PH/35 Applied a patch from the Sieve maintainer which fixes a bug in "notify".
1228 PH/36 Applied John Jetmore's patch to add -v functionality to exigrep.
1230 PH/37 If a message is not accepted after it has had an id assigned (e.g.
1231 because it turns out to be too big or there is a timeout) there is no
1232 "Completed" line in the log. When some messages of this type were
1233 selected by exigrep, they were listed as "not completed". Others were
1234 picked up by some special patterns. I have improved the selection
1235 criteria to be more general.
1237 PH/38 The host_find_failed option in the manualroute router can now be set
1238 to "ignore", to completely ignore a host whose IP address cannot be
1239 found. If all hosts are ignored, the behaviour is controlled by the new
1240 host_all_ignored option.
1242 PH/39 In a list of hosts for manualroute, if one item (either because of multi-
1243 homing or because of multiple MX records with /mx) generated more than
1244 one IP address, and the following item turned out to be the local host,
1245 all the secondary addresses of the first item were incorrectly removed
1246 from the list, along with the local host and any following hosts (which
1247 is what is supposed to happen).
1249 PH/40 When Exim receives a message, it writes the login name, uid, and gid of
1250 whoever called Exim into the -H file. In the case of the daemon it was
1251 behaving confusingly. When first started, it used values for whoever
1252 started the daemon, but after a SIGHUP it used the Exim user (because it
1253 calls itself on a restart). I have changed the code so that it now always
1254 uses the Exim user.
1256 PH/41 (Following a suggestion from Tony Finch) If all the RCPT commands in a
1257 message are rejected with the same error (e.g. no authentication or bad
1258 sender address), and a DATA command is nevertheless sent (as can happen
1259 with PIPELINING or a stupid MUA), the error message that was given to the
1260 RCPT commands is included in the rejection of the DATA command. This is
1261 intended to be helpful for MUAs that show only the final error to their
1262 users.
1264 PH/42 Another patch from the Sieve maintainer.
1266 SC/02 Eximstats - Differentiate between permanent and temporary rejects.
1267 Eximstats - Fixed some broken HTML links and added missing column headers
1268 (Jez Hancock).
1269 Eximstats - Fixed Grand Total Summary Domains, Edomains, and Email
1270 columns for Rejects, Temp Rejects, Ham, and Spam rows.
1272 SC/03 Eximstats - V1.58 Fix to get <> and blackhole to show in edomain tables.
1274 PH/43 Yet another patch from the Sieve maintainer.
1276 PH/44 I found a way to check for a TCP/IP connection going away before sending
1277 the response to the final '.' that terminates a message, but only in the
1278 case where the client has not sent further data following the '.'
1279 (unfortunately, this is allowed). However, in many cases there won't be
1280 any further data because there won't be any more messages to send. A call
1281 to select() can be used: if it shows that the input is "ready", there is
1282 either input waiting, or the socket has been closed. An attempt to read
1283 the next input character can distinguish the two cases. Previously, Exim
1284 would have sent an OK response which the client would never have see.
1285 This could lead to message repetition. This fix should cure that, at
1286 least in a lot of common cases.
1288 PH/45 Do not advertise STARTTLS in response to HELP unless it would be
1289 advertised in response to EHLO.
1292 Exim version 4.66
1293 -----------------
1295 PH/01 Two more bugs that were introduced by 4.64/PH/07, in addition to the one
1296 fixed by 4.65/MH/01 (is this a record?) are fixed:
1298 (i) An empty string was always treated as zero by the numeric comparison
1299 operators. This behaviour has been restored.
1301 (ii) It is documented that the numeric comparison operators always treat
1302 their arguments as decimal numbers. This was broken in that numbers
1303 starting with 0 were being interpreted as octal.
1305 While fixing these problems I realized that there was another issue that
1306 hadn't been noticed. Values of message_size_limit (both the global option
1307 and the transport option) were treated as octal if they started with 0.
1308 The documentation was vague. These values are now always treated as
1309 decimal, and I will make that clear in the documentation.
1312 Exim version 4.65
1313 -----------------
1315 TK/01 Disable default definition of HAVE_LINUX_SENDFILE. Clashes with
1316 Linux large file support (_FILE_OFFSET_BITS=64) on older glibc
1317 versions. (#438)
1319 MH/01 Don't check that the operands of numeric comparison operators are
1320 integers when their expansion is in "skipping" mode (fixes bug
1321 introduced by 4.64-PH/07).
1323 PH/01 If a system filter or a router generates more than SHRT_MAX (32767)
1324 child addresses, Exim now panics and dies. Previously, because the count
1325 is held in a short int, deliveries were likely to be lost. As such a
1326 large number of recipients for a single message is ridiculous
1327 (performance will be very, very poor), I have chosen to impose a limit
1328 rather than extend the field.
1331 Exim version 4.64
1332 -----------------
1334 TK/01 Bugzilla #401. Fix DK spooling code so that it can overwrite a
1335 leftover -K file (the existence of which was triggered by #402).
1336 While we were at it, introduced process PID as part of the -K
1337 filename. This should rule out race conditions when creating
1338 these files.
1340 TK/02 Bugzilla #402. Apply patch from Simon Arlott, speeding up DK signing
1341 processing considerably. Previous code took too long for large mails,
1342 triggering a timeout which in turn triggers #401.
1344 TK/03 Introduced HAVE_LINUX_SENDFILE to os.h-Linux. Currently only used
1345 in the DK code in transports.c. sendfile() is not really portable,
1346 hence the _LINUX specificness.
1348 TF/01 In the add_headers option to the mail command in an Exim filter,
1349 there was a bug that Exim would claim a syntax error in any
1350 header after the first one which had an odd number of characters
1351 in the field name.
1353 PH/01 If a server that rejects MAIL FROM:<> was the target of a sender
1354 callout verification, Exim cached a "reject" for the entire domain. This
1355 is correct for most verifications, but it is not correct for a recipient
1356 verification with use_sender or use_postmaster set, because in that case
1357 the callout does not use MAIL FROM:<>. Exim now distinguishes the special
1358 case of MAIL FROM:<> rejection from other early rejections (e.g.
1359 rejection of HELO). When verifying a recipient using a non-null MAIL
1360 address, the cache is ignored if it shows MAIL FROM:<> rejection.
1361 Whatever the result of the callout, the value of the domain cache is
1362 left unchanged (for any other kind of callout, getting as far as trying
1363 RCPT means that the domain itself is ok).
1365 PH/02 Tidied a number of unused variable and signed/unsigned warnings that
1366 gcc 4.1.1 threw up.
1368 PH/03 On Solaris, an unexpectedly close socket (dropped connection) can
1369 manifest itself as EPIPE rather than ECONNECT. When tidying away a
1370 session, the daemon ignores ECONNECT errors and logs others; it now
1371 ignores EPIPE as well.
1373 PH/04 Applied Nico Erfurth's refactoring patch to tidy up mime.c
1374 (quoted-printable decoding).
1376 PH/05 Applied Nico Erfurth's refactoring patch to tidy up spool_mbox.c, and
1377 later the small subsequent patch to fix an introduced bug.
1379 PH/06 Installed the latest Cygwin Makefile from the Cygwin maintainer.
1381 PH/07 There was no check for overflow in expansions such as ${if >{1}{4096M}}.
1383 PH/08 An error is now given if message_size_limit is specified negative.
1385 PH/09 Applied and tidied up Jakob Hirsch's patch for allowing ACL variables
1386 to be given (somewhat) arbitrary names.
1388 JJ/01 exipick 20060919.0, allow for arbitrary acl_ variables introduced
1389 in 4.64-PH/09.
1391 JJ/02 exipick 20060919.0, --show-vars args can now be regular expressions,
1392 miscellaneous code fixes
1394 PH/10 Added the log_reject_target ACL modifier to specify where to log
1395 rejections.
1397 PH/11 Callouts were setting the name used for EHLO/HELO from $smtp_active_
1398 hostname. This is wrong, because it relates to the incoming message (and
1399 probably the interface on which it is arriving) and not to the outgoing
1400 callout (which could be using a different interface). This has been
1401 changed to use the value of the helo_data option from the smtp transport
1402 instead - this is what is used when a message is actually being sent. If
1403 there is no remote transport (possible with a router that sets up host
1404 addresses), $smtp_active_hostname is used.
1406 PH/12 Installed Andrey Panin's patch to add a dovecot authenticator. Various
1407 tweaks were necessary in order to get it to work (see also 21 below):
1408 (a) The code assumed that strncpy() returns a negative number on buffer
1409 overflow, which isn't the case. Replaced with Exim's string_format()
1410 function.
1411 (b) There were several signed/unsigned issues. I just did the minimum
1412 hacking in of casts. There is scope for a larger refactoring.
1413 (c) The code used strcasecmp() which is not a standard C function.
1414 Replaced with Exim's strcmpic() function.
1415 (d) The code set only $1; it now sets $auth1 as well.
1416 (e) A simple test gave the error "authentication client didn't specify
1417 service in request". It would seem that Dovecot has changed its
1418 interface. Fortunately there's a specification; I followed it and
1419 changed what the client sends and it appears to be working now.
1421 PH/13 Added $message_headers_raw to provide the headers without RFC 2047
1422 decoding.
1424 PH/14 Corrected misleading output from -bv when -v was also used. Suppose the
1425 address A is aliased to B and C, where B exists and C does not. Without
1426 -v the output is "A verified" because verification stops after a
1427 successful redirection if more than one address is generated. However,
1428 with -v the child addresses are also verified. Exim was outputting "A
1429 failed to verify" and then showing the successful verification for C,
1430 with its parentage. It now outputs "B failed to verify", showing B's
1431 parentage before showing the successful verification of C.
1433 PH/15 Applied Michael Deutschmann's patch to allow DNS black list processing to
1434 look up a TXT record in a specific list after matching in a combined
1435 list.
1437 PH/16 It seems that the options setting for the resolver (RES_DEFNAMES and
1438 RES_DNSRCH) can affect the behaviour of gethostbyname() and friends when
1439 they consult the DNS. I had assumed they would set it the way they
1440 wanted; and indeed my experiments on Linux seem to show that in some
1441 cases they do (I could influence IPv6 lookups but not IPv4 lookups).
1442 To be on the safe side, however, I have now made the interface to
1443 host_find_byname() similar to host_find_bydns(), with an argument
1444 containing the DNS resolver options. The host_find_byname() function now
1445 sets these options at its start, just as host_find_bydns() does. The smtp
1446 transport options dns_qualify_single and dns_search_parents are passed to
1447 host_find_byname() when gethostbyname=TRUE in this transport. Other uses
1448 of host_find_byname() use the default settings of RES_DEFNAMES
1449 (qualify_single) but not RES_DNSRCH (search_parents).
1451 PH/17 Applied (a modified version of) Nico Erfurth's patch to make
1452 spool_read_header() do less string testing, by means of a preliminary
1453 switch on the second character of optional "-foo" lines. (This is
1454 overdue, caused by the large number of possibilities that now exist.
1455 Originally there were few.) While I was there, I also converted the
1456 str(n)cmp tests so they don't re-test the leading "-" and the first
1457 character, in the hope this might squeeze out yet more improvement.
1459 PH/18 Two problems with "group" syntax in header lines when verifying: (1) The
1460 flag allowing group syntax was set by the header_syntax check but not
1461 turned off, possible causing trouble later; (2) The flag was not being
1462 set at all for the header_verify test, causing "group"-style headers to
1463 be rejected. I have now set it in this case, and also caused header_
1464 verify to ignore an empty address taken from a group. While doing this, I
1465 came across some other cases where the code for allowing group syntax
1466 while scanning a header line wasn't quite right (mostly, not resetting
1467 the flag correctly in the right place). These bugs could have caused
1468 trouble for malformed header lines. I hope it is now all correct.
1470 PH/19 The functions {pwcheck,saslauthd}_verify_password() are always called
1471 with the "reply" argument non-NULL. The code, however (which originally
1472 came from elsewhere) had *some* tests for NULL when it wrote to *reply,
1473 but it didn't always do it. This confused somebody who was copying the
1474 code for some other use. I have removed all the tests.
1476 PH/20 It was discovered that the GnuTLS code had support for RSA_EXPORT, a
1477 feature that was used to support insecure browsers during the U.S. crypto
1478 embargo. It requires special client support, and Exim is probably the
1479 only MTA that supported it -- and would never use it because real RSA is
1480 always available. This code has been removed, because it had the bad
1481 effect of slowing Exim down by computing (never used) parameters for the
1482 RSA_EXPORT functionality.
1484 PH/21 On the advice of Timo Sirainen, added a check to the dovecot
1485 authenticator to fail if there's a tab character in the incoming data
1486 (there should never be unless someone is messing about, as it's supposed
1487 to be base64-encoded). Also added, on Timo's advice, the "secured" option
1488 if the connection is using TLS or if the remote IP is the same as the
1489 local IP, and the "valid-client-cert option" if a client certificate has
1490 been verified.
1492 PH/22 As suggested by Dennis Davis, added a server_condition option to *all*
1493 authenticators. This can be used for authorization after authentication
1494 succeeds. (In the case of plaintext, it servers for both authentication
1495 and authorization.)
1497 PH/23 Testing for tls_required and lost_connection in a retry rule didn't work
1498 if any retry times were supplied.
1500 PH/24 Exim crashed if verify=helo was activated during an incoming -bs
1501 connection, where there is no client IP address to check. In this
1502 situation, the verify now always succeeds.
1504 PH/25 Applied John Jetmore's -Mset patch.
1506 PH/26 Added -bem to be like -Mset, but loading a message from a file.
1508 PH/27 In a string expansion for a processed (not raw) header when multiple
1509 headers of the same name were present, leading whitespace was being
1510 removed from all of them, but trailing whitespace was being removed only
1511 from the last one. Now trailing whitespace is removed from each header
1512 before concatenation. Completely empty headers in a concatenation (as
1513 before) are ignored.
1515 PH/28 Fixed bug in backwards-compatibility feature of PH/09 (thanks to John
1516 Jetmore). It would have mis-read ACL variables from pre-4.61 spool files.
1518 PH/29 [Removed. This was a change that I later backed out, and forgot to
1519 correct the ChangeLog entry (that I had efficiently created) before
1520 committing the later change.]
1522 PH/30 Exim was sometimes attempting to deliver messages that had suffered
1523 address errors (4xx response to RCPT) over the same connection as other
1524 messages routed to the same hosts. Such deliveries are always "forced",
1525 so retry times are not inspected. This resulted in far too many retries
1526 for the affected addresses. The effect occurred only when there were more
1527 hosts than the hosts_max_try setting in the smtp transport when it had
1528 the 4xx errors. Those hosts that it had tried were not added to the list
1529 of hosts for which the message was waiting, so if all were tried, there
1530 was no problem. Two fixes have been applied:
1532 (i) If there are any address or message errors in an SMTP delivery, none
1533 of the hosts (tried or untried) are now added to the list of hosts
1534 for which the message is waiting, so the message should not be a
1535 candidate for sending over the same connection that was used for a
1536 successful delivery of some other message. This seems entirely
1537 reasonable: after all the message is NOT "waiting for some host".
1538 This is so "obvious" that I'm not sure why it wasn't done
1539 previously. Hope I haven't missed anything, but it can't do any
1540 harm, as the worst effect is to miss an optimization.
1542 (ii) If, despite (i), such a delivery is accidentally attempted, the
1543 routing retry time is respected, so at least it doesn't keep
1544 hammering the server.
1546 PH/31 Installed Andrew Findlay's patch to close the writing end of the socket
1547 in ${readsocket because some servers need this prod.
1549 PH/32 Added some extra debug output when updating a wait-xxx database.
1551 PH/33 The hint "could be header name not terminated by colon", which has been
1552 given for certain expansion errors for a long time, was not being given
1553 for the ${if def:h_colon_omitted{... case.
1555 PH/34 The spec says: "With one important exception, whenever a domain list is
1556 being scanned, $domain contains the subject domain." There was at least
1557 one case where this was not true.
1559 PH/35 The error "getsockname() failed: connection reset by peer" was being
1560 written to the panic log as well as the main log, but it isn't really
1561 panic-worthy as it just means the connection died rather early on. I have
1562 removed the panic log writing for the ECONNRESET error when getsockname()
1563 fails.
1565 PH/36 After a 4xx response to a RCPT error, that address was delayed (in queue
1566 runs only) independently of the message's sender address. This meant
1567 that, if the 4xx error was in fact related to the sender, a different
1568 message to the same recipient with a different sender could confuse
1569 things. In particualar, this can happen when sending to a greylisting
1570 server, but other circumstances could also provoke similar problems.
1571 I have changed the default so that the retry time for these errors is now
1572 based a combination of the sender and recipient addresses. This change
1573 can be overridden by setting address_retry_include_sender=false in the
1574 smtp transport.
1576 PH/37 For LMTP over TCP/IP (the smtp transport), error responses from the
1577 remote server are returned as part of bounce messages. This was not
1578 happening for LMTP over a pipe (the lmtp transport), but now it is the
1579 same for both kinds of LMTP.
1581 PH/38 Despite being documented as not happening, Exim was rewriting addresses
1582 in header lines that were in fact CNAMEs. This is no longer the case.
1584 PH/39 If -R or -S was given with -q<time>, the effect of -R or -S was ignored,
1585 and queue runs started by the daemon processed all messages. This has
1586 been fixed so that -R and -S can now usefully be given with -q<time>.
1588 PH/40 Import PCRE release 6.7 (fixes some bugs).
1590 PH/41 Add bitwise logical operations to eval (courtesy Brad Jorsch).
1592 PH/42 Give an error if -q is specified more than once.
1594 PH/43 Renamed the variables $interface_address and $interface_port as
1595 $received_ip_address and $received_port, to make it clear that these
1596 values apply to message reception, and not to the outgoing interface when
1597 a message is delivered. (The old names remain recognized, of course.)
1599 PH/44 There was no timeout on the connect() call when using a Unix domain
1600 socket in the ${readsocket expansion. There now is.
1602 PH/45 Applied a modified version of Brad Jorsch's patch to allow "message" to
1603 be meaningful with "accept".
1605 SC/01 Eximstats V1.43
1606 Bug fix for V1.42 with -h0 specified. Spotted by Chris Lear.
1608 SC/02 Eximstats V1.44
1609 Use a glob alias rather than an array ref in the generated
1610 parser. This improves both readability and performance.
1612 SC/03 Eximstats V1.45 (Marco Gaiarin / Steve Campbell)
1613 Collect SpamAssassin and rejection statistics.
1614 Don't display local sender or destination tables unless
1615 there is data to show.
1616 Added average volumes into the top table text output.
1618 SC/04 Eximstats V1.46
1619 Collect data on the number of addresses (recipients)
1620 as well as the number of messages.
1622 SC/05 Eximstats V1.47
1623 Added 'Message too big' to the list of mail rejection
1624 reasons (thanks to Marco Gaiarin).
1626 SC/06 Eximstats V1.48
1627 Mainlog lines which have GMT offsets and are too short to
1628 have a flag are now skipped.
1630 SC/07 Eximstats V1.49 (Alain Williams)
1631 Added the -emptyok flag.
1633 SC/08 Eximstats V1.50
1634 Fixes for obtaining the IP address from reject messages.
1636 JJ/03 exipick.20061117.2, made header handling as similar to exim as possible
1637 (added [br]h_ prefixes, implemented RFC2047 decoding. Fixed
1638 whitesspace changes from 4.64-PH/27
1640 JJ/04 exipick.20061117.2, fixed format and added $message_headers_raw to
1641 match 4.64-PH/13
1643 JJ/05 exipick.20061117.2, bug fixes (error out sooner when invalid criteria
1644 are found, allow negative numbers in numeric criteria)
1646 JJ/06 exipick.20061117.2, added new $message_body_missing variable
1648 JJ/07 exipick.20061117.2, added $received_ip_address and $received_port
1649 to match changes made in 4.64-PH/43
1651 PH/46 Applied Jori Hamalainen's patch to add features to exiqsumm.
1653 PH/47 Put in an explicit test for a DNS lookup of an address record where the
1654 "domain" is actually an IP address, and force a failure. This locks out
1655 those revolvers/nameservers that support "A-for-A" lookups, in
1656 contravention of the specifications.
1658 PH/48 When a host name was looked up from an IP address, and the subsequent
1659 forward lookup of the name timed out, the host name was left in
1660 $sender_host_name, contrary to the specification.
1662 PH/49 Although default lookup types such as lsearch* or cdb*@ have always been
1663 restricted to single-key lookups, Exim was not diagnosing an error if
1664 * or *@ was used with a query-style lookup.
1666 PH/50 Increased the value of DH_BITS in tls-gnu.c from 768 to 1024.
1668 MH/01 local_scan ABI version incremented to 1.1. It should have been updated
1669 long ago, but noone interested enough thought of it. Let's just say that
1670 the "1.1" means that there are some new functions that weren't there at
1671 some point in the past.
1673 PH/51 Error processing for expansion failure of helo_data from an smtp
1674 transport during callout processing was broken.
1676 PH/52 Applied John Jetmore's patch to allow tls-on-connect and STARTTLS to be
1677 tested/used via the -bh/-bhc/-bs options.
1679 PH/53 Added missing "#include <time.h>" to pcre/pcretest.c (this was a PCRE
1680 bug, fixed in subsequent PCRE releases).
1682 PH/54 Applied Robert Bannocks' patch to avoid a problem with references that
1683 arises when using the Solaris LDAP libraries (but not with OpenLDAP).
1685 PH/55 Check for a ridiculously long file name in exim_dbmbuild.
1688 Exim version 4.63
1689 -----------------
1691 SC/01 Use a glob alias rather than an array ref in eximstats generated
1692 parser. This improves both readability and performance.
1694 SC/02 Collect SpamAssassin and rejection statistics in eximstats.
1695 Don't display local sender or destination tables in eximstats unless
1696 there is data to show.
1697 Added average volumes into the eximstats top table text output.
1699 SC/03 Collect data on the number of addresses (recipients) as well
1700 as the number of messages in eximstats.
1702 TF/01 Correct an error in the documentation for the redirect router. Exim
1703 does (usually) call initgroups() when daemonizing.
1705 TF/02 Call initgroups() when dropping privilege in exim.c, so that Exim runs
1706 with consistent privilege compared to when running as a daemon.
1708 TF/03 Note in the spec that $authenticated_id is not set for local
1709 submissions from trusted users.
1711 TF/04 The ratelimit per_rcpt option now works correctly in acl_not_smtp.
1712 Thanks to Dean Brooks <dean@iglou.com> for the patch.
1714 TF/05 Make it easier to get SMTP authentication and TLS/SSL support working
1715 by adding some example configuration directives to the default
1716 configuration file. A little bit of work is required to uncomment the
1717 directives and define how usernames and passwords are checked, but
1718 there is now a framework to start from.
1720 PH/01 Added #define LDAP_DEPRECATED 1 to ldap.c because some of the "old"
1721 functions that Exim currently uses aren't defined in ldap.h for OpenLDAP
1722 without this. I don't know how relevant this is to other LDAP libraries.
1724 PH/02 Add the verb name to the "unknown ACL verb" error.
1726 PH/03 Magnus Holmgren's patch for filter_prepend_home.
1728 PH/03 Fixed Bugzilla #101: macro definition between ACLs doesn't work.
1730 PH/04 Applied Magnus Holmgren's patch to fix Bugzilla #98: transport's home
1731 directory not expanded when it should be if an expanded home directory
1732 was set for the address (which is overridden by the transport).
1734 PH/05 Applied Alex Kiernan's patch to fix Bugzilla #99: a problem with
1735 libradius.
1737 PH/06 Added acl_not_smtp_start, based on Johannes Berg's patch, and set the
1738 bit to forbid control=suppress_local_fixups in the acl_not_smtp ACL,
1739 because it is too late at that time, and has no effect.
1741 PH/07 Changed ${quote_pgsql to quote ' as '' instead of \' because of a
1742 security issue with \' (bugzilla #107). I could not use the
1743 PQescapeStringConn() function, because it needs a PGconn value as one of
1744 its arguments.
1746 PH/08 When testing addresses using -bt, indicate those final addresses that
1747 are duplicates that would not cause an additional delivery. At least one
1748 person was confused, thinking that -bt output corresponded to deliveries.
1749 (Suppressing duplicates isn't a good idea as you lose the information
1750 about possibly different redirections that led to the duplicates.)
1752 PH/09 Applied patch from Erik to use select() instead of poll() in spam.c on
1753 systems where poll() doesn't work, in particular OS X.
1755 PH/10 Added more information to debugging output for retry time not reached.
1757 PH/11 Applied patch from Arkadiusz Miskiewicz to apply a timeout to read
1758 operations in malware.c.
1760 PH/12 Applied patch from Magnus Holmgren to include the "h" tag in Domain Keys
1761 signatures.
1763 PH/13 If write_rejectlog was set false when logging was sent to syslog with
1764 syslog_duplication set false, log lines that would normally be written
1765 both the the main log and to the reject log were not written to syslog at
1766 all.
1768 PH/14 In the default configuration, change the use of "message" in ACL warn
1769 statements to "add_header".
1771 PH/15 Diagnose a filter syntax error for "seen", "unseen", or "noerror" if not
1772 not followed by a command (e.g. "seen endif").
1774 PH/16 Recognize SMTP codes at the start of "message" in ACLs and after :fail:
1775 and :defer: in a redirect router. Add forbid_smtp_code to suppress the
1776 latter.
1778 PH/17 Added extra conditions to the default value of delay_warning_condition
1779 so that it is now:
1781 ${if or { \
1782 { !eq{$h_list-id:$h_list-post:$h_list-subscribe:}{} } \
1783 { match{$h_precedence:}{(?i)bulk|list|junk} } \
1784 { match{$h_auto-submitted:}{(?i)auto-generated|auto-replied} } \
1785 }{no}{yes}}
1787 The Auto-Submitted: and various List- headers are standardised, whereas I
1788 don't think Precedence: ever was.
1790 PH/18 Refactored debugging code in route_finduser() to show more information,
1791 in particular, the error code if getpwnam() issues one.
1793 PH/19 Added PQsetClientEncoding(conn, "SQL_ASCII") to the pgsql code module.
1794 This is apparently needed in addition to the PH/07 change above to avoid
1795 any possible encoding problems.
1797 PH/20 Perl can change the locale. Exim was resetting it after a ${perl call,
1798 but not after initializing Perl.
1800 PH/21 Added a call to PQsetNoticeProcessor() to catch pgsql "notices" and
1801 output them only if debugging. By default they are written stderr,
1802 apparently, which is not desirable.
1804 PH/22 Added Alain Williams' LDAP patch to support setting REFERRALS=off on
1805 queries.
1807 JJ/01 exipick: added --reverse (and -R synonym), --random, --size, --sort and
1808 --not options
1810 JJ/02 exipick: rewrote --help documentation to hopefully make more clear.
1812 PH/23 Made -oMaa and -oMt work with -bh and -bs to pretend the connection is
1813 authenticated or an ident call has been made. Suppress the default
1814 values for $authenticated_id and $authenticated_sender (but permit -oMai
1815 and -oMas) when testing with -bh.
1817 PH/24 Re-jigged the order of the tests in the default configuration so that the
1818 tests for valid domains and recipients precede the DNS black list and CSA
1819 tests, on the grounds that those ones are more expensive.
1821 PH/25 Exim was not testing for a space following SMTP commands such as EHLO
1822 that require one. Thus, EHLORHUBARB was interpreted as a valid command.
1823 This bug exists in every version of Exim that I still have, right back to
1824 0.12.
1826 PH/26 (n)wildlsearch lookups are documented as being done case-insensitively.
1827 However, an attempt to turn on case-sensitivity in a regex key by
1828 including (?-i) didn't work because the subject string was already
1829 lowercased, and the effects were non-intuitive. It turns out that a
1830 one-line patch can be used to allow (?-i) to work as expected.
1833 Exim version 4.62
1834 -----------------
1836 TF/01 Fix the add_header change below (4.61 PH/55) which had a bug that (amongst
1837 other effects) broke the use of negated acl sub-conditions.
1839 PH/01 ${readsocket now supports Internet domain sockets (modified John Jetmore
1840 patch).
1842 PH/02 When tcp-wrappers is called from Exim, it returns only "deny" or "allow".
1843 "Deny" causes Exim to reject the incoming connection with a 554 error.
1844 Unfortunately, if there is a major crisis, such as a disk failure,
1845 tcp-wrappers gives "deny", whereas what one would like would be some
1846 kind of temporary error. A kludge has been added to help with this.
1847 Before calling hosts_ctl(), errno is set zero. If the result is "deny", a
1848 554 error is used if errno is still zero or contains ENOENT (which occurs
1849 if either of the /etc/hosts.{allow,deny} files is missing). Otherwise, a
1850 451 error is used.
1852 PH/03 Add -lutil to the default FreeBSD LIBS setting.
1854 PH/04 Change PH/19 for 4.61 was too wide. It should not be applied to host
1855 errors. Otherwise a message that provokes a temporary error (when other
1856 messages do not) can cause a whole host to time out.
1858 PH/05 Batch deliveries by appendfile and pipe transports did not work when the
1859 addresses were routed directly to files or pipes from a redirect router.
1860 File deliveries just didn't batch; pipe deliveries might have suffered
1861 odd errors.
1863 PH/06 A failure to get a lock for a hints database would erroneously always say
1864 "Failed to get write lock", even when it was really a read lock.
1866 PH/07 The appendfile transport was creating MBX lock files with a fixed mode
1867 of 0600. This has been changed to use the value of the lockfile_mode
1868 option (which defaults to 0600).
1870 PH/08 Applied small patch from the Sieve maintainer.
1872 PH/09 If maildir_quota_directory_regex was set to exclude (say) the .Trash
1873 folder from quota calculations, a direct delivery into this folder messed
1874 up the contents of the maildirsize file. This was because the regex was
1875 used only to exclude .Trash (or whatever) when the size of the mailbox
1876 was calculated. There was no check that a delivery was happening into an
1877 excluded directory. This bug has been fixed by ignoring all quota
1878 processing for deliveries into excluded directories.
1880 PH/10 Added the maildirfolder_create_regex option to appendfile.
1883 Exim version 4.61
1884 -----------------
1886 PH/01 The code for finding all the local interface addresses on a FreeBSD
1887 system running IPv6 was broken. This may well have applied to all BSD
1888 systems, as well as to others that have similar system calls. The broken
1889 code found IPv4 interfaces correctly, but gave incorrect values for the
1890 IPv6 interfaces. In particular, ::1 was not found. The effect in Exim was
1891 that it would not match correctly against @[] and not recognize the IPv6
1892 addresses as local.
1894 PH/02 The ipliteral router was not recognizing addresses of the form user@
1895 [ipv6:....] because it didn't know about the "ipv6:" prefix.
1897 PH/03 Added disable_ipv6.
1899 PH/04 Changed $reply_address to use the raw form of the headers instead of the
1900 decoded form, because it is most often used to construct To: headers
1901 lines in autoreplies, and the decoded form may well be syntactically
1902 invalid. However, $reply_address has leading white space removed, and all
1903 newlines turned into spaces so that the autoreply transport does not
1904 grumble.
1906 PH/05 If group was specified without a user on a router, and no group or user
1907 was specified on a transport, the group from the router was ignored.
1909 PH/06 Increased the number of ACL variables to 20 of each type, and arranged
1910 for visible compile-time settings that can be used to change these
1911 numbers, for those that want even more. Backwards compatibility with old
1912 spool files has been maintained. However, going back to a previous Exim
1913 release will lost any variables that are in spool files.
1915 PH/07 Two small changes when running in the test harness: increase delay when
1916 passing a TCP/IP connection to a new process, in case the original
1917 process has to generate a bounce, and remove special handling of
1918 (sic), which is no longer necessary.
1920 PH/08 Changed debug output of dbfn_open() flags from numbers to names, so as to
1921 be the same on different OS.
1923 PH/09 Moved a debug statement in filter processing to avoid a race problem when
1924 testing.
1926 JJ/01 exipick: fixed bug where -b (brief) output option showed "Vars:"
1927 whether --show-vars was specified or not
1929 JJ/02 exipick: Added support for new ACL variable spool format introduced
1930 in 4.61-PH/06
1932 PH/10 Fixed another bug related to PH/04 above: if an incoming message had a
1933 syntactically invalid From: or Reply-to: line, and a filter used this to
1934 generate an autoreply, and therefore failed to obtain an address for the
1935 autoreply, Exim could try to deliver to a non-existent relative file
1936 name, causing unrelated and misleading errors. What now happens is that
1937 it logs this as a hard delivery error, but does not attempt to create a
1938 bounce message.
1940 PH/11 The exinext utility has a -C option for testing purposes, but although
1941 the given file was scanned by exinext itself; it wasn't being passed on
1942 when Exim was called.
1944 PH/12 In the smtp transport, treat an explicit ECONNRESET error the same as
1945 an end-of-file indication when reading a command response.
1947 PH/13 Domain literals for IPv6 were not recognized unless IPv6 support was
1948 compiled. In many other places in Exim, IPv6 addresses are always
1949 recognized, so I have changed this. It also means that IPv4 domain
1950 literals of the form [IPV4:n.n.n.n] are now always recognized.
1952 PH/14 When a uid/gid is specified for the queryprogram router, it cannot be
1953 used if the router is not running as root, for example, when verifying at
1954 ACL time, or when using -bh. The debugging output from this situation was
1955 non-existent - all you got was a failure to exec. I have made two
1956 changes:
1958 (a) Failures to set uid/gid, the current directory, or a process leader
1959 in a subprocess such as that created by queryprogram now generate
1960 suitable debugging ouput when -d is set.
1962 (b) The queryprogram router detects when it is not running as root,
1963 outputs suitable debugging information if -d is set, and then runs
1964 the subprocess without attempting to change uid/gid.
1966 PH/15 Minor change to Makefile for building test_host (undocumented testing
1967 feature).
1969 PH/16 As discussed on the list in Nov/Dec: Exim no longer looks at the
1970 additional section of a DNS packet that returns MX or SRV records.
1971 Instead, it always explicitly searches for A/AAAA records. This avoids
1972 major problems that occur when a DNS server includes only records of one
1973 type (A or AAAA) in an MX/SRV packet. A byproduct of this change has
1974 fixed another bug: if SRV records were looked up and the corresponding
1975 address records were *not* found in the additional section, the port
1976 values from the SRV records were lost.
1978 PH/17 If a delivery to a pipe, file, or autoreply was deferred, Exim was not
1979 using the correct key (the original address) when searching the retry
1980 rules in order to find which one to use for generating the retry hint.
1982 PH/18 If quota_warn_message contains a From: header, Exim now refrains from
1983 adding the default one. Similarly, if it contains a Reply-To: header, the
1984 errors_reply_to option, if set, is not used.
1986 PH/19 When calculating a retry time, Exim used to measure the "time since
1987 failure" by looking at the "first failed" field in the retry record. Now
1988 it does not use this if it is later than than the arrival time of the
1989 message. Instead it uses the arrival time. This makes for better
1990 behaviour in cases where some deliveries succeed, thus re-setting the
1991 "first failed" field. An example is a quota failure for a huge message
1992 when small messages continue to be delivered. Without this change, the
1993 "time since failure" will always be short, possible causing more frequent
1994 delivery attempts for the huge message than are intended.
1995 [Note: This change was subsequently modified - see PH/04 for 4.62.]
1997 PH/20 Added $auth1, $auth2, $auth3 to contain authentication data (as well as
1998 $1, $2, $3) because the numerical variables can be reset during some
1999 expansion items (e.g. "match"), thereby losing the authentication data.
2001 PH/21 Make -bV show the size of off_t variables so that the test suite can
2002 decide whether to run tests for quotas > 2G.
2004 PH/22 Test the values given for quota, quota_filecount, quota_warn_threshold,
2005 mailbox_size, and mailbox_filecount in the appendfile transport. If a
2006 filecount value is greater than 2G or if a quota value is greater than 2G
2007 on a system where the size of off_t is not greater than 4, a panic error
2008 is given.
2010 PH/23 When a malformed item such as 1.2.3/24 appears in a host list, it can
2011 never match. The debug and -bh output now contains an explicit error
2012 message indicating a malformed IPv4 address or mask.
2014 PH/24 An host item such as was being treated as the IP address
2015 without a mask. Now it is not recognized as an IP address, and
2016 PH/23 above applies.
2018 PH/25 Do not write to syslog when running in the test harness. The only
2019 occasion when this arises is a failure to open the main or panic logs
2020 (for which there is an explicit test).
2022 PH/26 Added the /no_tell option to "control=freeze".
2024 PH/27 If a host name lookup failed very early in a connection, for example, if
2025 the IP address matched host_lookup and the reverse lookup yielded a name
2026 that did not have a forward lookup, an error message of the form "no IP
2027 address found for host xxx.xxx.xxx (during SMTP connection from NULL)"
2028 could be logged. Now it outputs the IP address instead of "NULL".
2030 PH/28 An enabling patch from MH: add new function child_open_exim2() which
2031 allows the sender and the authenticated sender to be set when
2032 submitting a message from within Exim. Since child_open_exim() is
2033 documented for local_scan(), the new function should be too.
2035 PH/29 In GnuTLS, a forced expansion failure for tls_privatekey was not being
2036 ignored. In both GnuTLS and OpenSSL, an expansion of tls_privatekey that
2037 results in an empty string is now treated as unset.
2039 PH/30 Fix eximon buffer overflow bug (Bugzilla #73).
2041 PH/31 Added sender_verify_fail logging option.
2043 PH/32 In November 2003, the code in Exim that added an empty Bcc: header when
2044 needed by RFC 822 but not by RFC 2822 was commented out. I have now
2045 tidied the source and removed it altogether.
2047 PH/33 When a queue run was abandoned because the load average was too high, a
2048 log line was always written; now it is written only if the queue_run log
2049 selector is set. In addition, the log line for abandonment now contains
2050 information about the queue run such as the pid. This is always present
2051 in "start" and "stop" lines but was omitted from the "abandon" line.
2053 PH/34 Omit spaces between a header name and the colon in the error message that
2054 is given when verify = headers_syntax fails (if there are lots of them,
2055 the message gets confusing).
2057 PH/35 Change the default for dns_check_names_pattern to allow slashes within
2058 names, as there are now some PTR records that contain slashes. This check
2059 is only to protect against broken name servers that fall over on strange
2060 characters, so the fact that it applies to all lookups doesn't matter.
2062 PH/36 Now that the new test suite is complete, we can remove some of the
2063 special code in Exim that was needed for the old test suite. For example,
2064 sorting DNS records because real resolvers return them in an arbitrary
2065 order. The new test suite's fake resolver always returns records in the
2066 same order.
2068 PH/37 When running in the test harness, use -odi for submitted messages (e.g.
2069 bounces) except when queue_only is set, to avoid logging races between
2070 the different processes.
2072 PH/38 Panic-die if .include specifies a non-absolute path.
2074 PH/39 A tweak to the "H" retry rule from its user.
2076 JJ/03 exipick: Removed parentheses from 'next' and 'last' calls that specified
2077 a label. They prevented compilation on older perls.
2079 JJ/04 exipick: Refactored code to prevent implicit split to @_ which caused
2080 a warning to be raised on newish perls.
2082 JJ/05 exipick: Fixed bug where -bpc always showed a count of all messages
2083 on queue. Changes to match documented behaviour of showing count of
2084 messages matching specified criteria.
2086 PH/40 Changed the default ident timeout from 30s to 5s.
2088 PH/41 Added support for the use of login_cap features, on those BSD systems
2089 that have them, for controlling the resources used by pipe deliveries.
2091 PH/42 The content-scanning code uses fopen() to create files in which to put
2092 message data. Previously it was not paying any attention to the mode of
2093 the files. Exim runs with umask(0) because the rest of the code creates
2094 files with open(), and sets the required mode explicitly. Thus, these
2095 files were ending up world-writeable. This was not a big issue, because,
2096 being within the spool directory, they were not world-accessible. I have
2097 created a function called modefopen, which takes an additional mode
2098 argument. It sets umask(777), creates the file, chmods it to the required
2099 mode, then resets the umask. All the relevant calls to fopen() in the
2100 content scanning code have been changed to use this function.
2102 PH/43 If retry_interval_max is set greater than 24 hours, it is quietly reset
2103 to 24 hours. This avoids potential overflow problems when processing G
2104 and H retry rules. I suspect nobody ever tinkers with this value.
2106 PH/44 Added STRIP_COMMAND=/usr/bin/strip to the FreeBSD Makefile.
2108 PH/45 When the plaintext authenticator is running as a client, the server's
2109 challenges are checked to ensure they are valid base64 strings. By
2110 default, the authentication attempt is cancelled if an invalid string is
2111 received. Setting client_ignore_invalid_base64 true ignores these errors.
2112 The decoded challenge strings are now placed in $auth1, $auth2, etc. as
2113 they are received. Thus, the responses can be made to depend on the
2114 challenges. If an invalid string is ignored, an empty string is placed in
2115 the variable.
2117 PH/46 Messages that are created by the autoreply transport now contains a
2118 References: header, in accordance with RFCs 2822 and 3834.
2120 PH/47 Added authenticated_sender_force to the smtp transport.
2122 PH/48 The ${prvs expansion was broken on systems where time_t was long long.
2124 PH/49 Installed latest patch from the Sieve maintainer.
2126 PH/50 When an Exim quota was set without a file count quota, and mailbox_size
2127 was also set, the appendfile transport was unnecessarily scanning a
2128 directory of message files (e.g. for maildir delivery) to find the count
2129 of files (along with the size), even though it did not need this
2130 information. It now does the scan only if it needs to find either the
2131 size of the count of files.
2133 PH/51 Added ${time_eval: to convert Exim time strings into seconds.
2135 PH/52 Two bugs concerned with error handling when the smtp transport is
2136 used in LMTP mode:
2138 (i) Exim was not creating retry information for temporary errors given
2139 for individual recipients after the DATA command when the smtp transport
2140 was used in LMTP mode. This meant that they could be retried too
2141 frequently, and not timed out correctly.
2143 (ii) Exim was setting the flag that allows error details to be returned
2144 for LMTP errors on RCPT commands, but not for LMTP errors for individual
2145 recipients that were returned after the DATA command.
2147 PH/53 This is related to PH/52, but is more general: for any failing address,
2148 when detailed error information was permitted to be returned to the
2149 sender, but the error was temporary, then after the final timeout, only
2150 "retry timeout exceeded" was returned. Now it returns the full error as
2151 well as "retry timeout exceeded".
2153 PH/54 Added control=allow_auth_unadvertised, as it seems there are clients that
2154 do this, and (what is worse) MTAs that accept it.
2156 PH/55 Added the add_header modified to ACLs. The use of "message" with "warn"
2157 will now be deprecated.
2159 PH/56 New os.c-cygwin from the Cygwin maintainer.
2161 JJ/06 exipick: added --unsorted option to allow unsorted output in all output
2162 formats (previously only available in exim formats via -bpr, -bpru,
2163 and -bpra. Now also available in native and exiqgrep formats)
2165 JJ/07 exipick: added --freeze and --thaw options to allow faster interaction
2166 with very large, slow to parse queues
2168 JJ/08 exipick: added ! as generic prefix to negate any criteria format
2170 JJ/09 exipick: miscellaneous performance enhancements (~24% improvements)
2172 PH/57 Tidies in SMTP dialogue display in debug output: (i) It was not showing
2173 responses to authentication challenges, though it was showing the
2174 challenges; (ii) I've removed the CR characters from the debug output for
2175 SMTP output lines.
2177 PH/58 Allow for the insertion of a newline as well as a space when a string
2178 is turned into more than one encoded-word during RFC 2047 encoding. The
2179 Sieve code now uses this.
2181 PH/59 Added the following errors that can be detected in retry rules: mail_4xx,
2182 data_4xx, lost_connection, tls_required.
2184 PH/60 When a VRFY deferred or FAILED, the log message rather than the user
2185 message was being sent as an SMTP response.
2187 PH/61 Add -l and -k options to exicyclog.
2189 PH/62 When verifying, if an address was redirected to one new address, so that
2190 verification continued, and the new address failed or deferred after
2191 having set something in $address_data, the value of $address_data was not
2192 passed back to the ACL. This was different to the case when no
2193 redirection occurred. The value is now passed back in both cases.
2195 PH/63 Changed the macro HAVE_LOGIN_CAP (see PH/41 for this release above) to
2196 HAVE_SETCLASSRESOURCES because there are different APIs in use that all
2197 use login_cap.h, so on its own it isn't the distinguishing feature. The
2198 new name refers directly to the setclassresources() function.
2200 PH/65 Added configuration files for NetBSD3.
2202 PH/66 Updated OS/Makefile-HP-UX for gcc 4.1.0 with HP-UX 11.
2204 PH/67 Fixed minor infelicity in the sorting of addresses to ensure that IPv6
2205 is preferred over IPv4.
2207 PH/68 The bounce_return_message and bounce_return_body options were not being
2208 honoured for bounces generated during the reception of non-SMTP messages.
2209 In particular, this applied to messages rejected by the ACL. This bug has
2210 been fixed. However, if bounce_return_message is true and bounce_return_
2211 body is false, the headers that are returned for a non-SMTP message
2212 include only those that have been read before the error was detected.
2213 (In the case of an ACL rejection, they have all been read.)
2215 PH/69 The HTML version of the specification is now built in a directory called
2216 spec_html instead of spec.html, because the latter looks like a path with
2217 a MIME-type, and this confuses some software.
2219 PH/70 Catch two compiler warnings in sieve.c.
2221 PH/71 Fixed an obscure and subtle bug (thanks Alexander & Matthias). The
2222 function verify_get_ident() calls ip_connect() to connect a socket, but
2223 if the "connect()" function timed out, ip_connect() used to close the
2224 socket. However, verify_get_ident() also closes the socket later, and in
2225 between Exim writes to the log, which may get opened at this point. When
2226 the socket was closed in ip_connect(), the log could get the same file
2227 descriptor number as the socket. This naturally causes chaos. The fix is
2228 not to close the socket in ip_connect(); the socket should be closed by
2229 the function that creates it. There was only one place in the code where
2230 this was missing, in the iplookup router, which I don't think anybody now
2231 uses, but I've fixed it anyway.
2233 PH/72 Make dns_again_means_nonexist apply to lookups using gethostbyname() as
2234 well as to direct DNS lookups. Otherwise the handling of names in host
2235 lists is inconsistent and therefore confusing.
2238 Exim version 4.60
2239 -----------------
2241 PH/01 Two changes to the default runtime configuration:
2243 (1) Move the checks for relay_from_hosts and authenticated clients from
2244 after to before the (commented out) DNS black list checks.
2246 (2) Add control=submission to the relay_from_hosts and authenticated
2247 clients checks, on the grounds that messages accepted by these
2248 statements are most likely to be submissions.
2250 PH/02 Several tidies to the handling of ${prvs and ${prvscheck:
2252 (1) Generate an error if the third argument for the ${prvs expansion is
2253 not a single digit.
2255 (2) Treat a missing third argument of ${prvscheck as if it were an empty
2256 string.
2258 (3) Reset the variables that are obtained from the first argument of
2259 ${prvscheck and used in the second argument before leaving the code,
2260 because their memory is reclaimed, so using them afterwards may do
2261 silly things.
2263 (4) Tidy up the code for expanding the arguments of ${prvscheck one by
2264 one (it's much easier than Tom thought :-).
2266 (5) Because of (4), we can now allow for the use of $prvscheck_result
2267 inside the third argument.
2269 PH/03 For some reason, the default setting of PATH when running a command from
2270 a pipe transport was just "/usr/bin". I have changed it to
2271 "/bin:/usr/bin".
2274 anything to be listed in the output from -bV.
2276 PH/05 When a filter generated an autoreply, the entire To: header line was
2277 quoted in the delivery log line, like this:
2279 => >A.N.Other <ano@some.domain> <original@ddress> ...
2281 This has been changed so that it extracts the operative address. There
2282 may be more than one such address. If so, they are comma-separated, like
2283 this:
2285 => >ano@some.domain,ona@other.domain <original@ddress> ...
2287 PH/06 When a client host used a correct literal IP address in a HELO or EHLO
2288 command, (for example, EHLO []) and the client's IP address was
2289 not being looked up in the rDNS to get a host name, Exim was showing the
2290 IP address twice in Received: lines, even though the IP addresses were
2291 identical. For example:
2293 Received: from [] (helo=[])
2295 However, if the real host name was known, it was omitting the HELO data
2296 if it matched the actual IP address. This has been tidied up so that it
2297 doesn't show the same IP address twice.
2299 PH/07 When both +timestamp and +memory debugging was on, the value given by
2300 $tod_xxx expansions could be wrong, because the tod_stamp() function was
2301 called by the debug printing, thereby overwriting the timestamp buffer.
2302 Debugging no longer uses the tod_stamp() function when +timestamp is set.
2304 PH/08 When the original message was included in an autoreply transport, it
2305 always said "this is a copy of the message, including all the headers",
2306 even if body_only or headers_only was set. It now gives an appropriate
2307 message.
2309 PH/09 Applied a patch from the Sieve maintainer which:
2311 o fixes some comments
2312 o adds the (disabled) notify extension core
2313 o adds some debug output for the result of if/elsif tests
2314 o points to the current vacation draft in the documentation
2315 and documents the missing references header update
2317 and most important:
2319 o fixes a bug in processing the envelope test (when testing
2320 multiple envelope elements, the last element determinted the
2321 result)
2323 PH/10 Exim was violating RFC 3834 ("Recommendations for Automatic Responses to
2324 Electronic Mail") by including:
2326 Auto-submitted: auto-generated
2328 in the messages that it generates (bounce messages and others, such as
2329 warnings). In the case of bounce messages for non-SMTP mesages, there was
2330 also a typo: it was using "Auto_submitted" (underscore instead of
2331 hyphen). Since every message generated by Exim is necessarily in response
2332 to another message, thes have all been changed to:
2334 Auto-Submitted: auto-replied
2336 in accordance with these statements in the RFC:
2338 The auto-replied keyword:
2340 - SHOULD be used on messages sent in direct response to another
2341 message by an automatic process,
2343 - MUST NOT be used on manually-generated messages,
2345 - MAY be used on Delivery Status Notifications (DSNs) and Message
2346 Disposition Notifications (MDNs),
2348 - MUST NOT be used on messages generated by automatic or periodic
2349 processes, except for messages which are automatic responses to
2350 other messages.
2352 PH/11 Added "${if def:sender_address {(envelope-from <$sender_address>)\n\t}}"
2353 to the default Received: header definition.
2355 PH/12 Added log selector acl_warn_skipped (default on).
2357 PH/13 After a successful wildlsearch lookup, discard the values of numeric
2358 variables because (a) they are in the wrong storage pool and (b) even if
2359 they were copied, it wouldn't work properly because of the caching.
2361 PH/14 Add check_rfc2047_length to disable enforcement of RFC 2047 length
2362 checking when decoding. Apparently there are clients that generate
2363 overlong encoded strings. Why am I not surprised?
2365 PH/15 If the first argument of "${if match_address" was not empty, but did not
2366 contain an "@" character, Exim crashed. Now it writes a panic log message
2367 and treats the condition as false.
2369 PH/16 In autoreply, treat an empty string for "once" the same as unset.
2371 PH/17 A further patch from the Sieve maintainer: "Introduce the new Sieve
2372 extension "envelope-auth". The code is finished and in agreement with
2373 other implementations, but there is no documentation so far and in fact,
2374 nobody wrote the draft yet. This extension is currently #undef'ed, thus
2375 not changing the active code.
2377 Print executed "if" and "elsif" statements when debugging is used. This
2378 helps a great deal to understand what a filter does.
2380 Document more things not specified clearly in RFC3028. I had all this
2381 sorted out, when out of a sudden new issues came to my mind. Oops."
2383 PH/18 Exim was not recognizing the "net-" search type prefix in match_ip lists
2384 (Bugzilla #53).
2386 PH/19 Exim expands the IPv6 address given to -bh to its full non-abbreviated
2387 canonical form (as documented). However, after a host name lookup from
2388 the IP address, check_host() was doing a simple string comparison with
2389 addresses acquired from the DNS when checking that the found name did
2390 have the original IP as one of its addresses. Since any found IPv6
2391 addresses are likely to be in abbreviated form, the comparison could
2392 fail. Luckily, there already exists a function for doing the comparison
2393 by converting both addresses to binary, so now that is used instead of
2394 the text comparison.
2396 PH/20 There was another similar case to PH/19, when a complete host name was
2397 given in a host list; looking up its IP address could give an abbreviated
2398 form, whereas the current host's name might or might not be abbreviated.
2399 The same fix has been applied.
2402 Exim version 4.54
2403 -----------------
2405 PH/01 The ${base62: operator adjusted itself to base 36 when BASE_62 was
2406 set to 36 (for Darwin and Cygwin), but the ${base62d: operator did not.
2407 It now does.
2409 PH/02 Two minor problems detected in Cygwin: the os.{c,h} files had lost */ on
2410 the CVS lines, and there was a missing #if HAVE_IPV6 in host.c.
2412 PH/03 Typo: missing ".o" in src/pcre/Makefile.
2414 PH/04 Tighten up "personal" tests: Instead of testing for any "List-"
2415 header line, restrict the check to what is listed in RFCs 2369 and 2929.
2416 Also, for "Auto-Submitted", treat anything other than "no" as
2417 non-personal, in accordance with RFC 3834. (Previously it treated
2418 anything starting "auto-" as non-personal.)
2420 TF/01 The control=submission/name=... option had a problem with syntax
2421 errors if the name included a slash character. The /name= option
2422 now slurps the rest of the string, so it can include any characters
2423 but it must come last in the list of options (after /sender_retain
2424 or /domain=).
2426 PH/05 Some modifications to the interface to the fake nameserver for the new
2427 testing suite.
2431 Exim version 4.53
2432 -----------------
2434 TK/01 Added the "success_on_redirect" address verification option. See
2435 NewStuff for rationale and an example.
2437 PH/01 Added support for SQLite, basic code supplied by David Woodhouse.
2439 PH/02 Patch to exigrep to allow it to work on syslog lines.
2441 PH/03 When creating an mbox file for a virus/spam scan, use fseek() instead of
2442 fread() to skip over the body file's header line, because in Cygwin the
2443 header line is locked and is inaccessible.
2445 PH/04 Added $message_exim_id, ultimately to replace $message_id (they will both
2446 co-exist for some time) to make it clear that it is the Exim ID that is
2447 referenced, not the Message-ID: header line.
2449 PH/05 Replaced all Tom's calls to snprintf() with calls to the internal
2450 string_format() function, because snprintf() does not exist on all
2451 operating systems.
2453 PH/06 The use of forbid_filter_existstest now also locks out the use of the
2454 ${stat: expansion item.
2456 PH/07 Changed "SMTP protocol violation: synchronization error" into "SMTP
2457 protocol synchronization error", to keep the pedants happy.
2459 PH/08 Arrange for USE_INET_NTOA_FIX to be set in config.h for AIX systems as
2460 well as for IRIX systems, when gcc is being used. See the host.c source
2461 file for comments.
2463 PH/09 Installed latest Cygwin configuration files from the Cygwin maintainer.
2465 PH/10 Named domain lists were not working if used in a queue_smtp_domains
2466 setting.
2468 PH/11 Added support for the IGNOREQUOTA extension to LMTP, both to the lmtp
2469 transport and to the smtp transport in LMTP mode.
2471 TK/02 Remove one case of BASE64 error detection FTTB (undocumented anyway).
2473 PH/12 There was a missing call to search_tidyup() before the fork() in rda.c to
2474 run a filter in a subprocess. This could lead to confusion in subsequent
2475 lookups in the parent process. There should also be a search_tidyup() at
2476 the end of the subprocess.
2478 PH/13 Previously, if "verify = helo" was set in an ACL, the condition was true
2479 only if the host matched helo_try_verify_hosts, which caused the
2480 verification to occur when the EHLO/HELO command was issued. The ACL just
2481 tested the remembered result. Now, if a previous verification attempt has
2482 not happened, "verify = helo" does it there and then.
2484 JJ/01 exipick: added $message_exim_id variable (see 4.53-PH/04)
2486 TK/03 Fix log output including CR from clamd.
2488 PH/14 A reference to $reply_address when Reply-to: was empty and From: did not
2489 exist provoked a memory error which could cause a segfault.
2491 PH/15 Installed PCRE 6.2
2493 PH/17 Defined BIND_8_COMPAT in the Darwin os.h file.
2495 PH/18 Reversed 4.52/PH/17 because the HP-UX user found it wasn't the cause
2496 of the problem. Specifically, suggested +O2 rather than +O1 for the
2497 HP-UX compiler.
2499 PH/19 Added sqlite_lock_timeout option (David Woodhouse's patch).
2501 PH/20 If a delivery was routed to a non-standard port by means of an SRV
2502 record, the port was not correctly logged when the outgoing_port log
2503 selector was set (it logged the transort's default port).
2505 PH/21 Added support for host-specific ports to manualroute, queryprogram,
2506 fallback_hosts, and "hosts" in the smtp transport.
2508 PH/22 If the log selector "outgoing_port" is set, the port is now also given on
2509 host errors such as "Connection refused".
2511 PH/23 Applied a patch to fix problems with exim-4.52 while doing radius
2512 authentication with radiusclient 0.4.9:
2514 - Error returned from rc_read_config was caught wrongly
2515 - Username/password not passed on to radius server due to wrong length.
2517 The presumption is that some radiusclient API changes for 4.51/PH/17
2518 were not taken care of correctly. The code is still untested by me (my
2519 Linux distribution still has 0.3.2 of radiusclient), but it was
2520 contributed by a Radius user.
2522 PH/24 When doing a callout, the value of $domain wasn't set correctly when
2523 expanding the "port" option of the smtp transport.
2525 TK/04 MIME ACL: Fix buffer underrun that occurs when EOF condition is met
2526 while reading a MIME header. Thanks to Tom Hughes for a patch.
2528 PH/24 Include config.h inside local_scan.h so that configuration settings are
2529 available.
2531 PH/25 Make $smtp_command_argument available after all SMTP commands. This means
2532 that in an ACL for RCPT (for example), you can examine exactly what was
2533 received.
2535 PH/26 Exim was recognizing IPv6 addresses of the form [IPv6:....] in EHLO
2536 commands, but it was not correctly comparing the address with the actual
2537 client host address. Thus, it would show the EHLO address in Received:
2538 header lines when this was not necessary.
2540 PH/27 Added the % operator to ${eval:}.
2542 PH/28 Exim tries to create and chdir to its spool directory when it starts;
2543 it should be ignoring failures (because with -C, for example, it has lost
2544 privilege). It wasn't ignoring creation failures other than "already
2545 exists".
2547 PH/29 Added "crypteq" to the list of supported features that Exim outputs when
2548 -bV or -d is used.
2550 PH/30 Fixed (presumably very longstanding) bug in exim_dbmbuild: if it failed
2551 because an input line was too long, either on its own, or by virtue of
2552 too many continuations, the temporary file was not being removed, and the
2553 return code was incorrect.
2555 PH/31 Missing "BOOL" in function definition in filtertest.c.
2557 PH/32 Applied Sieve patches from the maintainer.
2559 TK/05 Domainkeys: Accomodate for a minor API change in libdomainkeys 0.67.
2561 PH/33 Added "verify = not_blind".
2563 PH/34 There are settings for CHOWN_COMMAND and MV_COMMAND that can be used in
2564 Local/Makefile (with some defaults set). These are used in built scripts
2565 such as exicyclog, but they have never been used in the exim_install
2566 script (though there are many overriding facilities there). I have
2567 arranged that the exim_install script now takes note of these two
2568 settings.
2570 PH/35 Installed configuration files for Dragonfly.
2572 PH/36 When a locally submitted message by a trusted user did not contain a
2573 From: header, and the sender address was obtained from -f or from an SMTP
2574 MAIL command, and the trusted user did not use -F to supply a sender
2575 name, $originator_name was incorrectly used when constructing a From:
2576 header. Furthermore, $originator_name was used for submission mode
2577 messages from external hosts without From: headers in a similar way,
2578 which is clearly wrong.
2580 PH/37 Added control=suppress_local_fixups.
2582 PH/38 When log_selector = +received_sender was set, and the addition of the
2583 sender made the log line's construction buffer exactly full, or one byte
2584 less than full, an overflow happened when the terminating "\n" was
2585 subsequently added.
2587 PH/39 Added a new log selector, "unknown_in_list", which provokes a log entry
2588 when the result of a list match is failure because a DNS lookup failed.
2590 PH/40 RM_COMMAND is now used in the building process.
2592 PH/41 Added a "distclean" target to the top-level Makefile; it deletes all
2593 the "build-* directories that it finds.
2595 PH/42 (But a TF fix): In a domain list, Exim incorrectly matched @[] if the IP
2596 address in a domain literal was a prefix of an interface address.
2598 PH/43 (Again a TF fix): In the dnslookup router, do not apply widen_domains
2599 when verifying a sender address, unless rewrite_headers is false.
2601 PH/44 Wrote a long comment about why errors_to addresses are verified as
2602 recipients, not senders.
2604 TF/01 Add missing LIBS=-lm to OS/Makefile-OpenBSD which was overlooked when
2605 the ratelimit ACL was added.
2607 PH/45 Added $smtp_command for the full command (cf $smtp_command_argument).
2609 PH/46 Added extra information about PostgreSQL errors to the error string.
2611 PH/47 Added an interface to a fake DNS resolver for use by the new test suite,
2612 avoiding the need to install special zones in a real server. This is
2613 backwards compatible; if it can't find the fake resolver, it drops back.
2614 Thus, both old and new test suites can be run.
2616 TF/02 Added util/ratelimit.pl
2618 TF/03 Minor fix to the ratelimit code to improve its behaviour in case the
2619 clock is set back in time.
2621 TF/04 Fix the ratelimit support in exim_fixdb. Patch provided by Brian
2622 Candler <B.Candler@pobox.com>.
2624 TF/05 The fix for PH/43 was not completely correct; widen_domains is always
2625 OK for addresses that are the result of redirections.
2627 PH/48 A number of further additions for the benefit of the new test suite,
2628 including a fake gethostbyname() that interfaces to the fake DNS resolver
2629 (see PH/47 above).
2631 TF/06 The fix for widen_domains has also been applied to qualify_single and
2632 search_parents which are the other dnslookup options that can cause
2633 header rewrites.
2635 PH/49 Michael Haardt's randomized retrying, but as a separate retry parameter
2636 type ("H").
2638 PH/50 Make never_users, trusted_users, admin_groups, trusted_groups expandable.
2640 TF/07 Exim produced the error message "an SRV record indicated no SMTP
2641 service" if it encountered an MX record with an empty target hostname.
2642 The message is now "an MX or SRV record indicated no SMTP service".
2644 TF/08 Change PH/13 introduced the possibility that verify=helo may defer,
2645 if the DNS of the sending site is misconfigured. This is quite a
2646 common situation. This change restores the behaviour of treating a
2647 helo verification defer as a failure.
2649 PH/51 If self=fail was set on a router, the bounce message did not include the
2650 actual error message.
2653 Exim version 4.52
2654 -----------------
2656 TF/01 Added support for Client SMTP Authorization. See NewStuff for details.
2658 PH/01 When a transport filter timed out in a pipe delivery, and the pipe
2659 command itself ended in error, the underlying message about the transport
2660 filter timeout was being overwritten with the pipe command error. Now the
2661 underlying error message should be appended to the second error message.
2663 TK/01 Fix poll() being unavailable on Mac OSX 10.2.
2665 PH/02 Reduce the amount of output that "make" produces by default. Full output
2666 can still be requested.
2668 PH/03 The warning log line about a condition test deferring for a "warn" verb
2669 was being output only once per connection, rather than after each
2670 occurrence (because it was using the same function as for successful
2671 "warn" verbs). This seems wrong, so I have changed it.
2673 TF/02 Two buglets in acl.c which caused Exim to read a few bytes of memory that
2674 it should not have, which might have caused a crash in the right
2675 circumstances, but probably never did.
2677 PH/04 Installed a modified version of Tony Finch's patch to make submission
2678 mode fix the return path as well as the Sender: header line, and to
2679 add a /name= option so that you can make the user's friendly name appear
2680 in the header line.
2682 TF/03 Added the control = fakedefer ACL modifier.
2684 TF/04 Added the ratelimit ACL condition. See NewStuff for details. Thanks to
2685 Mark Lowes for thorough testing.
2687 TK/02 Rewrote SPF support to work with libspf2 versions >1.2.0.
2689 TK/03 Merged latest SRS patch from Miles Wilton.
2691 PH/05 There's a shambles in IRIX6 - it defines EX_OK in unistd.h which conflicts
2692 with the definition in sysexits.h (which is #included earlier).
2693 Fortunately, Exim does not actually use EX_OK. The code used to try to
2694 preserve the sysexits.h value, by assumimg that macro definitions were
2695 scanned for macro replacements. I have been disabused of this notion,
2696 so now the code just undefines EX_OK before #including unistd.h.
2698 PH/06 There is a timeout for writing blocks of data, set by, e.g. data_timeout
2699 in the smtp transport. When a block could not be written in a single
2700 write() function, the timeout was being re-applied to each part-write.
2701 This seems wrong - if the receiver was accepting one byte at a time it
2702 would take for ever. The timeout is now adjusted when this happens. It
2703 doesn't have to be particularly precise.
2705 TK/04 Added simple SPF lookup method in EXPERIMENTAL_SPF. See NewStuff for
2706 details. Thanks to Chris Webb <chris@arachsys.com> for the patch!
2708 PH/07 Added "fullpostmaster" verify option, which does a check to <postmaster>
2709 without a domain if the check to <postmaster@domain> fails.
2711 SC/01 Eximstats: added -xls and the ability to specify output files
2712 (patch written by Frank Heydlauf).
2714 SC/02 Eximstats: use FileHandles for outputing results.
2716 SC/03 Eximstats: allow any combination of xls, txt, and html output.
2718 SC/04 Eximstats: fixed display of large numbers with -nvr option
2720 SC/05 Eximstats: fixed merging of reports with empty tables.
2722 SC/06 Eximstats: added the -include_original_destination flag
2724 SC/07 Eximstats: removed tabs and trailing whitespace.
2726 TK/05 Malware: Improve on aveserver error handling. Patch from Alex Miller.
2728 TK/06 MBOX spool code: Add real "From " MBOX separator line
2729 so the .eml file is really in mbox format (even though
2730 most programs do not really care). Patch from Alex Miller.
2732 TK/07 MBOX spool code: Add X-Envelope-From: and X-Envelope-To: headers.
2733 The latter is generated from $received_to and is only set if the
2734 message has one envelope recipient. SA can use these headers,
2735 obviously out-of-the-box. Patch from Alex Miller.
2737 PH/08 The ${def test on a variable was returning false if the variable's
2738 value was "0", contrary to what the specification has always said!
2739 The result should be true unless the variable is empty.
2741 PH/09 The syntax error of a character other than { following "${if
2742 def:variable_name" (after optional whitespace) was not being diagnosed.
2743 An expansion such as ${if def:sender_ident:{xxx}{yyy}} in which an
2744 accidental colon was present, for example, could give incorrect results.
2746 PH/10 Tidied the code in a number of places where the st_size field of a stat()
2747 result is used (not including appendfile, where other changes are about
2748 to be made).
2750 PH/11 Upgraded appendfile so that quotas larger than 2G are now supported.
2751 This involved changing a lot of size variables from int to off_t. It
2752 should work with maildirs and everything.
2754 TK/08 Apply fix provided by Michael Haardt to prevent deadlock in case of
2755 spamd dying while we are connected to it.
2757 TF/05 Fixed a ${extract error message typo reported by Jeremy Harris
2758 <jgh@wizmail.org>
2760 PH/12 Applied Alex Kiernan's patch for the API change for the error callback
2761 function for BDB 4.3.
2763 PH/13 Changed auto_thaw such that it does not apply to bounce messages.
2765 PH/14 Imported PCRE 6.0; this was more than just a trivial operation because
2766 the sources for PCRE have been re-arranged and more files are now
2767 involved.
2769 PH/15 The code I had for printing potentially long long variables in PH/11
2770 above was not the best (it lost precision). The length of off_t variables
2771 is now inspected at build time, and an appropriate printing format (%ld
2772 or %lld) is chosen and #defined by OFF_T_FMT. We also define LONGLONG_T
2773 to be "long long int" or "long int". This is needed for the internal
2774 formatting function string_vformat().
2776 PH/16 Applied Matthew Newton's patch to exicyclog: "If log_file_path is set in
2777 the configuration file to be ":syslog", then the script "guesses" where
2778 the logs files are, rather than using the compiled in default. In our
2779 case the guess is not the same as the compiled default, so the script
2780 suddenly stopped working when I started to use syslog. The patch checks
2781 to see if log_file_path is "". If so, it attempts to read it from exim
2782 with no configuration file to get the compiled in version, before it
2783 falls back to the previous guessing code."
2785 TK/09 Added "prvs" and "prvscheck" expansion items. These help a lot with
2786 implementing BATV in an Exim configuration. See NewStuff for the gory
2787 details.
2789 PH/17 Applied Michael Haardt's patch for HP-UX, affecting only the os.h and
2790 Makefile that are specific to HP-UX.
2792 PH/18 If the "use_postmaster" option was set for a recipient callout together
2793 with the "random" option, the postmaster address was used as the MAIL
2794 FROM address for the random test, but not for the subsequent recipient
2795 test. It is now used for both.
2797 PH/19 Applied Michael Haardt's patch to update Sieve to RFC3028bis. "The
2798 patch removes a few documentation additions to RFC 3028, because the
2799 latest draft now contains them. It adds the new en;ascii-case comparator
2800 and a new error check for 8bit text in MIME parts. Comparator and
2801 require names are now matched exactly. I enabled the subaddress
2802 extension, but it is not well tested yet (read: it works for me)."
2804 PH/20 Added macros for time_t as for off_t (see PH/15 above) and used them to
2805 rework some of the code of TK/09 above to avoid the hardwired use of
2806 "%lld" and "long long". Replaced the call to snprintf() with a call to
2807 string_vformat().
2809 PH/21 Added some other messages to those in 4.51/PH/42, namely "All relevant MX
2810 records point to non-existent hosts", "retry timeout exceeded", and
2811 "retry time not reached for any host after a long failure period".
2813 PH/22 Fixed some oversights/typos causing bugs when Exim is compiled with
2814 experimental DomainKeys support:
2816 (1) The filter variables $n0-$n9 and $sn0-$sn9 were broken.
2817 (2) On an error such as an illegally used "control", the wrong name for
2818 the control was given.
2820 These problems did NOT occur unless DomainKeys support was compiled.
2822 PH/23 Added daemon_startup_retries and daemon_startup_sleep.
2824 PH/24 Added ${if match_ip condition.
2826 PH/25 Put debug statements on either side of calls to EXIM_DBOPEN() for hints
2827 databases so that it will be absolutely obvious if a crash occurs in the
2828 DB library. This is a regular occurrence (often caused by mis-matched
2829 db.h files).
2831 PH/26 Insert a lot of missing (void) casts for functions such as chown(),
2832 chmod(), fcntl(), sscanf(), and other functions from stdio.h. These were
2833 picked up on a user's system that detects such things. There doesn't seem
2834 to be a gcc warning option for this - only an attribute that has to be
2835 put on the function's prototype. It seems that in Fedora Core 4 they have
2836 set this on a number of new functions. No doubt there will be more in due
2837 course.
2839 PH/27 If a dnslookup or manualroute router is set with verify=only, it need not
2840 specify a transport. However, if an address that was verified by such a
2841 router was the subject of a callout, Exim crashed because it tried to
2842 read the rcpt_include_affixes from the non-existent transport. Now it
2843 just assumes that the setting of that option is false. This bug was
2844 introduced by 4.51/PH/31.
2846 PH/28 Changed -d+all to exclude +memory, because that information is very
2847 rarely of interest, but it makes the output a lot bigger. People tend to
2848 do -d+all out of habit.
2850 PH/29 Removed support for the Linux-libc5 build, as it is obsolete and the
2851 code in os-type was giving problems when libc.so lives in lib64, like on
2852 x86_64 Fedora Core.
2854 PH/30 Exim's DNS code uses the original T_xxx names for DNS record times. These
2855 aren't the modern standard, and it seems that some systems' include files
2856 don't always have them. Exim was already checking for some of the newer
2857 ones like T_AAAA, and defining it itself. I've added checks for all the
2858 record types that Exim uses.
2860 PH/31 When using GnuTLS, if the parameters cache file did not exist, Exim was
2861 not automatically generating a new one, as it is supposed to. This
2862 prevented TLS from working. If the file did exist, but contained invalid
2863 data, a new version was generated, as expected. It was only the case of a
2864 non-existent file that was broken.
2866 TK/10 Domainkeys: Fix a bug in verification that caused a crash in conjunction
2867 with a change in libdomainkeys > 0.64.
2869 TK/11 Domainkeys: Change the logic how the "testing" policy flag is retrieved
2870 from DNS. If the selector record carries the flag, it now has
2871 precedence over the domain-wide flag.
2873 TK/12 Cleared some compiler warnings related to SPF, SRS and DK code.
2875 PH/32 In mua_wrapper mode, if an smtp transport configuration error (such as
2876 the use of a port name that isn't defined in /etc/services) occurred, the
2877 message was deferred as in a normal delivery, and thus remained on the
2878 spool, instead of being failed because of the mua_wrapper setting. This
2879 is now fixed, and I tidied up some of the mua_wrapper messages at the
2880 same time.
2882 SC/08 Eximstats: whilst parsing the mainlog(s), store information about
2883 the messages in a hash of arrays rather than using individual hashes.
2884 This is a bit cleaner and results in dramatic memory savings, albeit
2885 at a slight CPU cost.
2887 SC/09 Eximstats: added the -show_rt<list> and the -show_dt<list> flags
2888 as requested by Marc Sherman.
2890 SC/10 Eximstats: added histograms for user specified patterns as requested
2891 by Marc Sherman.
2893 SC/11 Eximstats: v1.43 - bugfix for pattern histograms with -h0 specified.
2895 PH/33 Patch from the Cygwin maintainer to add "b" to all occurences of
2896 fopen() in the content-scanning modules that did not already have it.
2899 Exim version 4.51
2900 -----------------
2902 TK/01 Added Yahoo DomainKeys support via libdomainkeys. See
2903 doc/experimental-spec.txt for details. (http://domainkeys.sf.net)
2905 TK/02 Fix ACL "control" statement not being available in MIME ACL.
2907 TK/03 Fix ACL "regex" condition not being available in MIME ACL.
2909 PH/01 Installed a patch from the Sieve maintainer that allows -bf to be used
2910 to test Sieve filters that use "vacation".
2912 PH/02 Installed a slightly modified version of Nikos Mavrogiannopoulos' patch
2913 that changes the way the GnuTLS parameters are stored in the cache file.
2914 The new format can be generated externally. For backward compatibility,
2915 if the data in the cache doesn't make sense, Exim assumes it has read an
2916 old-format file, and it generates new data and writes a new file. This
2917 means that you can't go back to an older release without removing the
2918 file.
2920 PH/03 A redirect router that has both "unseen" and "one_time" set does not
2921 work if there are any delivery delays because "one_time" forces the
2922 parent to be marked "delivered", so its unseen clone is never tried
2923 again. For this reason, Exim now forbids the simultaneous setting of
2924 these two options.
2926 PH/04 Change 4.11/85 fixed an obscure bug concerned with addresses that are
2927 redirected to themselves ("homonym" addresses). Read the long ChangeLog
2928 entry if you want to know the details. The fix, however, neglected to
2929 consider the case when local delivery batching is involved. The test for
2930 "previously delivered" was not happening when checking to see if an
2931 address could be batched with a previous (undelivered) one; under
2932 certain circumstances this could lead to multiple deliveries to the same
2933 address.
2935 PH/05 Renamed the macro SOCKLEN_T as EXIM_SOCKLEN_T because AIX uses SOCKLEN_T
2936 in its include files, and this causes problems building Exim.
2938 PH/06 A number of "verify =" ACL conditions have no options (e.g. verify =
2939 header_syntax) but Exim was just ignoring anything given after a slash.
2940 In particular, this caused confusion with an attempt to use "verify =
2941 reverse_host_lookup/defer_ok". An error is now given when options are
2942 supplied for verify items that do not have them. (Maybe reverse_host_
2943 lookup should have a defer_ok option, but that's a different point.)
2945 PH/07 Increase the size of the buffer for incoming SMTP commands from 512 (as
2946 defined by RFC 821) to 2048, because there were problems with some AUTH
2947 commands, and RFC 1869 says the size should be increased for extended
2948 SMTP commands that take arguments.
2950 PH/08 Added ${dlfunc dynamically loaded function for expansion (code from Tony
2951 Finch).
2953 PH/09 Previously, an attempt to use ${perl when it wasn't compiled gave an
2954 "unknown" error; now it says that the functionality isn't in the binary.
2956 PH/10 Added a nasty fudge to try to recognize and flatten LDAP passwords in
2957 an address' error message when a string expansion fails (syntax or
2958 whatever). Otherwise the password may appear in the log. Following change
2959 PH/42 below, there is no longer a chance of it appearing in a bounce
2960 message.
2962 PH/11 Installed exipick version 20050225.0 from John Jetmore.
2964 PH/12 If the last host in a fallback_hosts list was multihomed, only the first
2965 of its addresses was ever tried. (Bugzilla bug #2.)
2967 PH/13 If "headers_add" in a transport didn't end in a newline, Exim printed
2968 the result incorrectly in the debug output. (It correctly added a newline
2969 to what was transported.)
2971 TF/01 Added $received_time.
2973 PH/14 Modified the default configuration to add an acl_smtp_data ACL, with
2974 commented out examples of how to interface to a virus scanner and to
2975 SpamAssassin. Also added commented examples of av_scanner and
2976 spamd_address settings.
2978 PH/15 Further to TK/02 and TK/03 above, tidied up the tables of what conditions
2979 and controls are allowed in which ACLs. There were a couple of minor
2980 errors. Some of the entries in the conditions table (which is a table of
2981 where they are NOT allowed) were getting very unwieldy; rewrote them as a
2982 negation of where the condition IS allowed.
2984 PH/16 Installed updated OS/os.c-cygwin from the Cygwin maintainer.
2986 PH/17 The API for radiusclient changed at release 0.4.0. Unfortunately, the
2987 header file does not have a version number, so I've had to invent a new
2988 value for RADIUS_LIB_TYPE, namely "RADIUSCLIENTNEW" to request the new
2989 API. The code is untested by me (my Linux distribution still has 0.3.2 of
2990 radiusclient), but it was contributed by a Radius user.
2992 PH/18 Installed Lars Mainka's patch for the support of CRL collections in
2993 files or directories, for OpenSSL.
2995 PH/19 When an Exim process that is running as root has to create an Exim log
2996 file, it does so in a subprocess that runs as exim:exim so as to get the
2997 ownership right at creation (otherwise, other Exim processes might see
2998 the file with the wrong ownership). There was no test for failure of this
2999 fork() call, which would lead to the process getting stuck as it waited
3000 for a non-existent subprocess. Forks do occasionally fail when resources
3001 run out. I reviewed all the other calls to fork(); they all seem to check
3002 for failure.
3004 PH/20 When checking for unexpected SMTP input at connect time (before writing
3005 the banner), Exim was not dealing correctly with a non-positive return
3006 from the read() function. If the client had disconnected by this time,
3007 the result was a log entry for a synchronization error with an empty
3008 string after "input=" when read() returned zero. If read() returned -1
3009 (an event I could not check), uninitialized data bytes were printed.
3010 There were reports of junk text (parts of files, etc) appearing after
3011 "input=".
3013 PH/21 Added acl_not_smtp_mime to allow for MIME scanning for non-SMTP messages.
3015 PH/22 Added support for macro redefinition, and (re)definition in between
3016 driver and ACL definitions.
3018 PH/23 The cyrus_sasl authenticator was expanding server_hostname, but then
3019 forgetting to use the resulting value; it was using the unexpanded value.
3021 PH/24 The cyrus_sasl authenticator was advertising mechanisms for which it
3022 hadn't been configured. The fix is from Juergen Kreileder, who
3023 understands it better than I do:
3025 "Here's what I see happening with three configured cyrus_sasl
3026 authenticators configured (plain, login, cram-md5):
3028 On startup auth_cyrus_sasl_init() gets called for each of these.
3029 This means three calls to sasl_listmech() without a specified mech_list.
3030 => SASL tests which mechs of all available mechs actually work
3031 => three warnings about OTP not working
3032 => the returned list contains: plain, login, cram-md5, digest-md5, ...
3034 With the patch, sasl_listmech() also gets called three times. But now
3035 SASL's mech_list option is set to the server_mech specified in the the
3036 authenticator. Or in other words, the answer from sasl_listmech()
3037 gets limited to just the mech you're testing for (which is different
3038 for each call.)
3039 => the return list contains just 'plain' or 'login', 'cram-md5' or
3040 nothing depending on the value of ob->server_mech.
3042 I've just tested the patch: Authentication still works fine,
3043 unavailable mechs specified in the exim configuration are still
3044 caught, and the auth.log warnings about OTP are gone."
3046 PH/25 When debugging is enabled, the contents of the command line are added
3047 to the debugging output, even when log_selector=+arguments is not
3048 specified.
3050 PH/26 Change scripts/os-type so that when "uname -s" returns just "GNU", the
3051 answer is "GNU", and only if the return is "GNU/something" is the answer
3052 "Linux".
3054 PH/27 $acl_verify_message is now set immediately after the failure of a
3055 verification in an ACL, and so is available in subsequent modifiers. In
3056 particular, the message can be preserved by coding like this:
3058 warn !verify = sender
3059 set acl_m0 = $acl_verify_message
3061 Previously, $acl_verify_message was set only while expanding "message"
3062 and "log_message" when a very denied access.
3064 PH/28 Modified OS/os.c-Linux with
3066 -#ifndef OS_LOAD_AVERAGE
3067 +#if !defined(OS_LOAD_AVERAGE) && defined(__linux__)
3069 to make Exim compile on kfreebsd-gnu. (I'm totally confused about the
3070 nomenclature these days.)
3072 PH/29 Installed patch from the Sieve maintainer that adds the options
3073 sieve_useraddress and sieve_subaddress to the redirect router.
3075 PH/30 In these circumstances:
3076 . Two addresses routed to the same list of hosts;
3077 . First host does not offer TLS;
3078 . First host accepts first address;
3079 . First host gives temporary error to second address;
3080 . Second host offers TLS and a TLS session is established;
3081 . Second host accepts second address.
3082 Exim incorrectly logged both deliveries with the TLS parameters (cipher
3083 and peerdn, if requested) that were in fact used only for the second
3084 address.
3086 PH/31 When doing a callout as part of verifying an address, Exim was not paying
3087 attention to any local part prefix or suffix that was matched by the
3088 router that accepted the address. It now behaves in the same way as it
3089 does for delivery: the affixes are removed from the local part unless
3090 rcpt_include_affixes is set on the transport.
3092 PH/32 Add the sender address, as F=<...>, to the log line when logging a
3093 timeout during the DATA phase of an incoming message.
3095 PH/33 Sieve envelope tests were broken for match types other than :is. I have
3096 applied a patch sanctioned by the Sieve maintainer.
3098 PH/34 Change 4.50/80 broke Exim in that it could no longer handle cases where
3099 the uid or gid is negative. A case of a negative gid caused this to be
3100 noticed. The fix allows for either to be negative.
3102 PH/35 ACL_WHERE_MIME is now declared unconditionally, to avoid too much code
3103 clutter, but the tables that are indexed by ACL_WHERE_xxx values had been
3104 overlooked.
3106 PH/36 The change PH/12 above was broken. Fixed it.
3108 PH/37 Exim used to check for duplicate addresses in the middle of routing, on
3109 the grounds that routing the same address twice would always produce the
3110 same answer. This might have been true once, but it is certainly no
3111 longer true now. Routing a child address may depend on the previous
3112 routing that produced that child. Some complicated redirection strategies
3113 went wrong when messages had multiple recipients, and made Exim's
3114 behaviour dependent on the order in which the addresses were given.
3116 I have moved the duplicate checking until after the routing is complete.
3117 Exim scans the addresses that are assigned to local and remote
3118 transports, and removes any duplicates. This means that more work will be
3119 done, as duplicates will always all be routed, but duplicates are
3120 presumably rare, so I don't expect this is of any significance.
3122 For deliveries to pipes, files, and autoreplies, the duplicate checking
3123 still happens during the routing process, since they are not going to be
3124 routed further.
3126 PH/38 Installed a patch from Ian Freislich, with the agreement of Tom Kistner.
3127 It corrects a timeout issue with spamd. This is Ian's comment: "The
3128 background is that sometimes spamd either never reads data from a
3129 connection it has accepted, or it never writes response data. The exiscan
3130 spam.[ch] uses a 3600 second timeout on spamd socket reads, further, it
3131 blindly assumes that writes won't block so it may never time out."
3133 PH/39 Allow G after quota size as well as K and M.
3135 PH/40 The value set for $authenticated_id in an authenticator may not contain
3136 binary zeroes or newlines because the value is written to log lines and
3137 to spool files. There was no check on this. Now the value is run through
3138 the string_printing() function so that such characters are converted to
3139 printable escape sequences.
3141 PH/41 $message_linecount is a new variable that contains the total number of
3142 lines in the message. Compare $body_linecount, which is the count for the
3143 body only.
3145 PH/42 Exim no longer gives details of delivery errors for specific addresses in
3146 bounce and delay warning messages, except in certain special cases, which
3147 are as follows:
3149 (a) An SMTP error message from a remote host;
3150 (b) A message specified in a :fail: redirection;
3151 (c) A message specified in a "fail" command in a system filter;
3152 (d) A message specified in a FAIL return from the queryprogram router;
3153 (e) A message specified by the cannot_route_message router option.
3155 In these cases only, Exim does include the error details in bounce and
3156 warning messages. There are also a few cases where bland messages such
3157 as "unrouteable address" or "local delivery error" are given.
3159 PH/43 $value is now also set for the "else" part of a ${run expansion.
3161 PH/44 Applied patch from the Sieve maintainer: "The vacation draft is still
3162 being worked on, but at least Exim now implements the latest version to
3163 play with."
3165 PH/45 In a pipe transport, although a timeout while waiting for the pipe
3166 process to complete was treated as a delivery failure, a timeout while
3167 writing the message to the pipe was logged, but erroneously treated as a
3168 successful delivery. Such timeouts include transport filter timeouts. For
3169 consistency with the overall process timeout, these timeouts are now
3170 treated as errors, giving rise to delivery failures by default. However,
3171 there is now a new Boolean option for the pipe transport called
3172 timeout_defer, which, if set TRUE, converts the failures into defers for
3173 both kinds of timeout. A transport filter timeout is now identified in
3174 the log output.
3176 PH/46 The "scripts/Configure-config.h" script calls "make" at one point. On
3177 systems where "make" and "gmake" are different, calling "gmake" at top
3178 level broke things. I've arranged for the value of $(MAKE) to be passed
3179 from the Makefile to this script so that it can call the same version of
3180 "make".
3183 A note about Exim versions 4.44 and 4.50
3184 ----------------------------------------
3186 Exim 4.50 was meant to be the next release after 4.43. It contains a lot of
3187 changes of various kinds. As a consequence, a big documentation update was
3188 needed. This delayed the release for rather longer than seemed good, especially
3189 in the light of a couple of (minor) security issues. Therefore, the changes
3190 that fixed bugs were backported into 4.43, to create a 4.44 maintenance
3191 release. So 4.44 and 4.50 are in effect two different branches that both start
3192 from 4.43.
3194 I have left the 4.50 change log unchanged; it contains all the changes since
3195 4.43. The change log for 4.44 is below; many of its items are identical to
3196 those for 4.50. This seems to be the most sensible way to preserve the
3197 historical information.
3200 Exim version 4.50
3201 -----------------
3203 1. Minor wording change to the doc/README.SIEVE file.
3205 2. Change 4.43/35 introduced a bug: if quota_filecount was set, the
3206 computation of the current number of files was incorrect.
3208 3. Closing a stable door: arrange to panic-die if setitimer() ever fails. The
3209 bug fixed in 4.43/37 would have been diagnosed quickly if this had been in
3210 place.
3212 4. Give more explanation in the error message when the command for a transport
3213 filter fails to execute.
3215 5. There are several places where Exim runs a non-Exim command in a
3216 subprocess. The SIGUSR1 signal should be disabled for these processes. This
3217 was being done only for the command run by the queryprogram router. It is
3218 now done for all such subprocesses. The other cases are: ${run, transport
3219 filters, and the commands run by the lmtp and pipe transports.
3221 6. Added CONFIGURE_GROUP build-time option.
3223 7. Some older OS have a limit of 256 on the maximum number of file
3224 descriptors. Exim was using setrlimit() to set 1000 as a large value
3225 unlikely to be exceeded. Change 4.43/17 caused a lot of logging on these
3226 systems. I've change it so that if it can't get 1000, it tries for 256.
3228 8. "control=submission" was allowed, but had no effect, in a DATA ACL. This
3229 was an oversight, and furthermore, ever since the addition of extra
3230 controls (e.g. 4.43/32), the checks on when to allow different forms of
3231 "control" were broken. There should now be diagnostics for all cases when a
3232 control that does not make sense is encountered.
3234 9. Added the /retain_sender option to "control=submission".
3236 10. $recipients is now available in the predata ACL (oversight).
3238 11. Tidy the search cache before the fork to do a delivery from a message
3239 received from the command line. Otherwise the child will trigger a lookup
3240 failure and thereby defer the delivery if it tries to use (for example) a
3241 cached ldap connection that the parent has called unbind on.
3243 12. If verify=recipient was followed by verify=sender in a RCPT ACL, the value
3244 of $address_data from the recipient verification was clobbered by the
3245 sender verification.
3247 13. The value of address_data from a sender verification is now available in
3248 $sender_address_data in subsequent conditions in the ACL statement.
3250 14. Added forbid_sieve_filter and forbid_exim_filter to the redirect router.
3252 15. Added a new option "connect=<time>" to callout options, to set a different
3253 connection timeout.
3255 16. If FIXED_NEVER_USERS was defined, but empty, Exim was assuming the uid 0
3256 was its contents. (It was OK if the option was not defined at all.)
3258 17. A "Completed" log line is now written for messages that are removed from
3259 the spool by the -Mrm option.
3261 18. New variables $sender_verify_failure and $recipient_verify_failure contain
3262 information about exactly what failed.
3264 19. Added -dd to debug only the daemon process.
3266 20. Incorporated Michael Haardt's patch to ldap.c for improving the way it
3267 handles timeouts, both on the server side and network timeouts. Renamed the
3268 CONNECT parameter as NETTIMEOUT (but kept the old name for compatibility).
3270 21. The rare case of EHLO->STARTTLS->HELO was setting the protocol to "smtp".
3271 It is now set to "smtps".
3273 22. $host_address is now set to the target address during the checking of
3274 ignore_target_hosts.
3276 23. When checking ignore_target_hosts for an ipliteral router, no host name was
3277 being passed; this would have caused $sender_host_name to have been used if
3278 matching the list had actually called for a host name (not very likely,
3279 since this list is usually IP addresses). A host name is now passed as
3280 "[x.x.x.x]".
3282 24. Changed the calls that set up the SIGCHLD handler in the daemon to use the
3283 code that specifies a non-restarting handler (typically sigaction() in
3284 modern systems) in an attempt to fix a rare and obscure crash bug.
3286 25. Narrowed the window for a race in the daemon that could cause it to ignore
3287 SIGCHLD signals. This is not a major problem, because they are used only to
3288 wake it up if nothing else does.
3290 26. A malformed maildirsize file could cause Exim to calculate negative values
3291 for the mailbox size or file count. Odd effects could occur as a result.
3292 The maildirsize information is now recalculated if the size or filecount
3293 end up negative.
3295 27. Added HAVE_SYS_STATVFS_H to the os.h file for Linux, as it has had this
3296 support for a long time. Removed HAVE_SYS_VFS_H.
3298 28. Installed the latest version of exipick from John Jetmore.
3300 29. In an address list, if the pattern was not a regular expression, an empty
3301 subject address (from a bounce message) matched only if the pattern was an
3302 empty string. Non-empty patterns were not even tested. This was the wrong
3303 because it is perfectly reasonable to use an empty address as part of a
3304 database query. An empty address is now tested by patterns that are
3305 lookups. However, all the other forms of pattern expect the subject to
3306 contain a local part and a domain, and therefore, for them, an empty
3307 address still always fails if the pattern is not itself empty.
3309 30. Exim went into a mad DNS loop when attempting to do a callout where the
3310 host was specified on an smtp transport, and looking it up yielded more
3311 than one IP address.
3313 31. Re-factored the code for checking spool and log partition space into a
3314 function that finds that data and another that does the check. The former
3315 is then used to implement four new variables: $spool_space, $log_space,
3316 $spool_inodes, and $log_inodes.
3318 32. The RFC2047 encoding function was originally intended for short strings
3319 such as real names; it was not keeping to the 75-character limit for
3320 encoded words that the RFC imposes. It now respects the limit, and
3321 generates multiple encoded words if necessary. To be on the safe side, I
3322 have increased the buffer size for the ${rfc2047: expansion operator from
3323 1024 to 2048 bytes.
3325 33. It is now permitted to omit both strings after an "if" condition; if the
3326 condition is true, the result is "true". As before, when the second string
3327 is omitted, a false condition yields an empty string. This makes it less
3328 cumbersome to write custom ACL and router conditions.
3330 34. Failure to deliver a bounce message always caused it to be frozen, even if
3331 there was an errors_to setting on the router. The errors_to setting is now
3332 respected.
3334 35. If an IPv6 address is given for -bh or -bhc, it is now converted to the
3335 canonical form (fully expanded) before being placed in
3336 $sender_host_address.
3338 36. The table in the code that translates DNS record types into text (T_A to
3339 "A" for instance) was missing entries for NS and CNAME. It is just possible
3340 that this could have caused confusion if both these types were looked up
3341 for the same domain, because the text type is used as part of Exim's
3342 per-process caching. But the chance of anyone hitting this buglet seems
3343 very small.
3345 37. The dnsdb lookup has been extended in a number of ways.
3347 (1) There is a new type, "zns", which walks up the domain tree until it
3348 finds some nameserver records. It should be used with care.
3350 (2) There is a new type, "mxh", which is like "mx" except that it returns
3351 just the host names, not the priorities.
3353 (3) It is now possible to give a list of domains (or IP addresses) to be
3354 looked up. The behaviour when one of the lookups defers can be
3355 controlled by a keyword.
3357 (4) It is now possible to specify the separator character for use when
3358 multiple records are returned.
3360 38. The dnslists ACL condition has been extended: it is now possible to supply
3361 a list of IP addresses and/or domains to be looked up in a particular DNS
3362 domain.
3364 39. Added log_selector=+queue_time_overall.
3366 40. When running the queue in the test harness, wait just a tad after forking a
3367 delivery process, to get repeatability of debugging output.
3369 41. Include certificate and key file names in error message when GnuTLS fails
3370 to set them up, because the GnuTLS error message doesn't include the name
3371 of the failing file when there is a problem reading it.
3373 42. Allow both -bf and -bF in the same test run.
3375 43. Did the same fix as 41 above for OpenSSL, which had the same infelicity.
3377 44. The "Exiscan patch" is now merged into the mainline Exim source.
3379 45. Sometimes the final signoff response after QUIT could fail to get
3380 transmitted in the non-TLS case. Testing !tls_active instead of tls_active
3381 < 0 before doing a fflush(). This bug looks as though it goes back to the
3382 introduction of TLS in release 3.20, but "sometimes" must have been rare
3383 because the tests only now provoked it.
3385 46. Reset the locale to "C" after calling embedded Perl, in case it was changed
3386 (this can affect the format of dates).
3388 47. exim_tidydb, when checking for the continued existence of a message for
3389 which it has found a message-specific retry record, was not finding
3390 messages that were in split spool directories. Consequently, it was
3391 deleting retry records that should have stayed in existence.
3393 48. Steve fixed some bugs in eximstats.
3395 49. The SPA authentication driver was not abandoning authentication and moving
3396 on to the next authenticator when an expansion was forced to fail,
3397 contradicting the general specification for all authenticators. Instead it
3398 was generating a temporary error. It now behaves as specified.
3400 50. The default ordering of permitted cipher suites for GnuTLS was pessimal
3401 (the order specifies the preference for clients). The order is now AES256,
3402 AES128, 3DES, ARCFOUR128.
3404 51. Small patch to Sieve code - explicitly set From: when generating an
3405 autoreply.
3407 52. Exim crashed if a remote delivery caused a very long error message to be
3408 recorded - for instance if somebody sent an entire SpamAssassin report back
3409 as a large number of 550 error lines. This bug was coincidentally fixed by
3410 increasing the size of one of Exim's internal buffers (big_buffer) that
3411 happened as part of the Exiscan merge. However, to be on the safe side, I
3412 have made the code more robust (and fixed the comments that describe what
3413 is going on).
3415 53. Now that there can be additional text after "Completed" in log lines (if
3416 the queue_time_overall log selector is set), a one-byte patch to exigrep
3417 was needed to allow it to recognize "Completed" as not the last thing in
3418 the line.
3420 54. The LDAP lookup was not handling a return of LDAP_RES_SEARCH_REFERENCE. A
3421 patch that reportedly fixes this has been added. I am not expert enough to
3422 create a test for it. This is what the patch creator wrote:
3424 "I found a little strange behaviour of ldap code when working with
3425 Windows 2003 AD Domain, where users was placed in more than one
3426 Organization Units. When I tried to give exim partial DN, the exit code
3427 of ldap_search was unknown to exim because of LDAP_RES_SEARCH_REFERENCE.
3428 But simultaneously result of request was absolutely normal ldap result,
3429 so I produce this patch..."
3431 Later: it seems that not all versions of LDAP support LDAP_RES_SEARCH_
3432 REFERENCE, so I have modified the code to exclude the patch when that macro
3433 is not defined.
3435 55. Some experimental protocols are using DNS PTR records for new purposes. The
3436 keys for these records are domain names, not reversed IP addresses. The
3437 dnsdb PTR lookup now tests whether its key is an IP address. If not, it
3438 leaves it alone. Component reversal etc. now happens only for IP addresses.
3439 CAN-2005-0021
3441 56. Improve error message when ldap_search() fails in OpenLDAP or Solaris LDAP.
3443 57. Double the size of the debug message buffer (to 2048) so that more of very
3444 long debug lines gets shown.
3446 58. The exicyclog utility now does better if the number of log files to keep
3447 exceeds 99. In this case, it numbers them 001, 002 ... instead of 01, 02...
3449 59. Two changes related to the smtp_active_hostname option:
3451 (1) $smtp_active_hostname is now available as a variable.
3452 (2) The default for smtp_banner uses $smtp_active_hostname instead
3453 of $primary_hostname.
3455 60. The host_aton() function is supposed to be passed a string that is known
3456 to be a valid IP address. However, in the case of IPv6 addresses, it was
3457 not checking this. This is a hostage to fortune. Exim now panics and dies
3458 if the condition is not met. A case was found where this could be provoked
3459 from a dnsdb PTR lookup with an IPv6 address that had more than 8
3460 components; fortuitously, this particular loophole had already been fixed
3461 by change 4.50/55 above.
3463 If there are any other similar loopholes, the new check in host_aton()
3464 itself should stop them being exploited. The report I received stated that
3465 data on the command line could provoke the exploit when Exim was running as
3466 exim, but did not say which command line option was involved. All I could
3467 find was the use of -be with a bad dnsdb PTR lookup, and in that case it is
3468 running as the user.
3469 CAN-2005-0021
3471 61. There was a buffer overflow vulnerability in the SPA authentication code
3472 (which came originally from the Samba project). I have added a test to the
3473 spa_base64_to_bits() function which I hope fixes it.
3474 CAN-2005-0022
3476 62. Configuration update for GNU/Hurd and variations. Updated Makefile-GNU and
3477 os.h-GNU, and added configuration files for GNUkFreeBSD and GNUkNetBSD.
3479 63. The daemon start-up calls getloadavg() while still root for those OS that
3480 need the first call to be done as root, but it missed one case: when
3481 deliver_queue_load_max is set with deliver_drop_privilege. This is
3482 necessary for the benefit of the queue runner, because there is no re-exec
3483 when deliver_drop_privilege is set.
3485 64. A call to exiwhat cut short delays set up by "delay" modifiers in ACLs.
3486 This has been fixed.
3488 65. Caching of lookup data for "hosts =" ACL conditions, when a named host list
3489 was in use, was not putting the data itself into the right store pool;
3490 consequently, it could be overwritten for a subsequent message in the same
3491 SMTP connection. (Fix 4.40/11 dealt with the non-cache case, but overlooked
3492 the caching.)
3494 66. Added hosts_max_try_hardlimit to the smtp transport, default 50.
3496 67. The string_is_ip_address() function returns 0, 4, or 6, for "no an IP
3497 address", "IPv4 address", and "IPv6 address", respectively. Some calls of
3498 the function were treating the return as a boolean value, which happened to
3499 work because 0=false and not-0=true, but is not correct code.
3501 68. The host_aton() function was not handling scoped IPv6 addresses (those
3502 with, for example, "%eth0" on the end) correctly.
3504 69. Fixed some compiler warnings in acl.c for the bitmaps specified with
3505 negated items (that is, ~something) in unsigned ints. Some compilers
3506 apparently mutter when there is no cast.
3508 70. If an address verification called from an ACL failed, and did not produce a
3509 user-specific message (i.e. there was only a "system" message), nothing was
3510 put in $acl_verify_message. In this situation, it now puts the system
3511 message there.
3513 71. Change 4.23/11 added synchronization checking at the start of an SMTP
3514 session; change 4.31/43 added the unwanted input to the log line - except
3515 that it did not do this in the start of session case. It now does.
3517 72. After a timeout in a callout SMTP session, Exim still sent a QUIT command.
3518 This is wrong and can cause the other end to generate a synchronization
3519 error if it is another Exim or anything else that does the synchronization
3520 check. A QUIT command is no longer sent after a timeout.
3522 73. $host_lookup_deferred has been added, to make it easier to detect DEFERs
3523 during host lookups.
3525 74. The defer_ok option of callout verification was not working if it was used
3526 when verifying addresses in header lines, that is, for this case:
3528 verify = header_sender/callout=defer_ok
3530 75. A backgrounded daemon closed stdin/stdout/stderr on entry; this meant that
3531 those file descriptors could be used for SMTP connections. If anything
3532 wrote to stderr (the example that came up was "warn" in embedded Perl), it
3533 could be sent to the SMTP client, causing chaos. The daemon now opens
3534 stdin, stdout, and stderr to /dev/null when it puts itself into the
3535 background.
3537 76. Arrange for output from Perl's "warn" command to be written to Exim's main
3538 log by default. The user can override this with suitable Perl magic.
3540 77. The use of log_message on a "discard" ACL verb, which is supposed to add to
3541 the log message when discard triggers, was not working for the DATA ACL or
3542 for the non-SMTP ACL.
3544 78. Error message wording change in sieve.c.
3546 79. If smtp_accept_max_per_host was set, the number of connections could be
3547 restricted to fewer than expected, because the daemon was trying to set up
3548 a new connection before checking whether the processes handling previous
3549 connections had finished. The check for completed processes is now done
3550 earlier. On busy systems, this bug wouldn't be noticed because something
3551 else would have woken the daemon, and it would have reaped the completed
3552 process earlier.
3554 80. If a message was submitted locally by a user whose login name contained one
3555 or more spaces (ugh!), the spool file that Exim wrote was not re-readable.
3556 It caused a spool format error. I have fixed the spool reading code. A
3557 related problem was that the "from" clause in the Received: line became
3558 illegal because of the space(s). It is now covered by ${quote_local_part.
3560 81. Included the latest eximstats from Steve (adds average sizes to HTML Top
3561 tables).
3563 82. Updated OS/Makefile-AIX as per message from Mike Meredith.
3565 83. Patch from Sieve maintainer to fix unterminated string problem in
3566 "vacation" handling.
3568 84. Some minor changes to the Linux configuration files to help with other
3569 OS variants using glibc.
3571 85. One more patch for Sieve to update vacation handling to latest spec.
3574 ----------------------------------------------------
3575 See the note above about the 4.44 and 4.50 releases.
3576 ----------------------------------------------------
3579 Exim version 4.44
3580 -----------------
3582 1. Change 4.43/35 introduced a bug that caused file counts to be
3583 incorrectly computed when quota_filecount was set in an appendfile
3584 transport
3586 2. Closing a stable door: arrange to panic-die if setitimer() ever fails. The
3587 bug fixed in 4.43/37 would have been diagnosed quickly if this had been in
3588 place.
3590 3. Give more explanation in the error message when the command for a transport
3591 filter fails to execute.
3593 4. There are several places where Exim runs a non-Exim command in a
3594 subprocess. The SIGUSR1 signal should be disabled for these processes. This
3595 was being done only for the command run by the queryprogram router. It is
3596 now done for all such subprocesses. The other cases are: ${run, transport
3597 filters, and the commands run by the lmtp and pipe transports.
3599 5. Some older OS have a limit of 256 on the maximum number of file
3600 descriptors. Exim was using setrlimit() to set 1000 as a large value
3601 unlikely to be exceeded. Change 4.43/17 caused a lot of logging on these
3602 systems. I've change it so that if it can't get 1000, it tries for 256.
3604 6. "control=submission" was allowed, but had no effect, in a DATA ACL. This
3605 was an oversight, and furthermore, ever since the addition of extra
3606 controls (e.g. 4.43/32), the checks on when to allow different forms of
3607 "control" were broken. There should now be diagnostics for all cases when a
3608 control that does not make sense is encountered.
3610 7. $recipients is now available in the predata ACL (oversight).
3612 8. Tidy the search cache before the fork to do a delivery from a message
3613 received from the command line. Otherwise the child will trigger a lookup
3614 failure and thereby defer the delivery if it tries to use (for example) a
3615 cached ldap connection that the parent has called unbind on.
3617 9. If verify=recipient was followed by verify=sender in a RCPT ACL, the value
3618 of $address_data from the recipient verification was clobbered by the
3619 sender verification.
3621 10. If FIXED_NEVER_USERS was defined, but empty, Exim was assuming the uid 0
3622 was its contents. (It was OK if the option was not defined at all.)
3624 11. A "Completed" log line is now written for messages that are removed from
3625 the spool by the -Mrm option.
3627 12. $host_address is now set to the target address during the checking of
3628 ignore_target_hosts.
3630 13. When checking ignore_target_hosts for an ipliteral router, no host name was
3631 being passed; this would have caused $sender_host_name to have been used if
3632 matching the list had actually called for a host name (not very likely,
3633 since this list is usually IP addresses). A host name is now passed as
3634 "[x.x.x.x]".
3636 14. Changed the calls that set up the SIGCHLD handler in the daemon to use the
3637 code that specifies a non-restarting handler (typically sigaction() in
3638 modern systems) in an attempt to fix a rare and obscure crash bug.
3640 15. Narrowed the window for a race in the daemon that could cause it to ignore
3641 SIGCHLD signals. This is not a major problem, because they are used only to
3642 wake it up if nothing else does.
3644 16. A malformed maildirsize file could cause Exim to calculate negative values
3645 for the mailbox size or file count. Odd effects could occur as a result.
3646 The maildirsize information is now recalculated if the size or filecount
3647 end up negative.
3649 17. Added HAVE_SYS_STATVFS_H to the os.h file for Linux, as it has had this
3650 support for a long time. Removed HAVE_SYS_VFS_H.
3652 18. Updated exipick to current release from John Jetmore.
3654 19. Allow an empty sender to be matched against a lookup in an address list.
3655 Previously the only cases considered were a regular expression, or an
3656 empty pattern.
3658 20. Exim went into a mad DNS lookup loop when doing a callout where the
3659 host was specified on the transport, if the DNS lookup yielded more than
3660 one IP address.
3662 21. The RFC2047 encoding function was originally intended for short strings
3663 such as real names; it was not keeping to the 75-character limit for
3664 encoded words that the RFC imposes. It now respects the limit, and
3665 generates multiple encoded words if necessary. To be on the safe side, I
3666 have increased the buffer size for the ${rfc2047: expansion operator from
3667 1024 to 2048 bytes.
3669 22. Failure to deliver a bounce message always caused it to be frozen, even if
3670 there was an errors_to setting on the router. The errors_to setting is now
3671 respected.
3673 23. If an IPv6 address is given for -bh or -bhc, it is now converted to the
3674 canonical form (fully expanded) before being placed in
3675 $sender_host_address.
3677 24. Updated eximstats to version 1.33
3679 25. Include certificate and key file names in error message when GnuTLS fails
3680 to set them up, because the GnuTLS error message doesn't include the name
3681 of the failing file when there is a problem reading it.
3683 26. Expand error message when OpenSSL has problems setting up cert/key files.
3684 As per change 25.
3686 27. Reset the locale to "C" after calling embedded Perl, in case it was changed
3687 (this can affect the format of dates).
3689 28. exim_tidydb, when checking for the continued existence of a message for
3690 which it has found a message-specific retry record, was not finding
3691 messages that were in split spool directories. Consequently, it was
3692 deleting retry records that should have stayed in existence.
3694 29. eximstats updated to version 1.35
3695 1.34 - allow eximstats to parse syslog lines as well as mainlog lines
3696 1.35 - bugfix such that pie charts by volume are generated correctly
3698 30. The SPA authentication driver was not abandoning authentication and moving
3699 on to the next authenticator when an expansion was forced to fail,
3700 contradicting the general specification for all authenticators. Instead it
3701 was generating a temporary error. It now behaves as specified.
3703 31. The default ordering of permitted cipher suites for GnuTLS was pessimal
3704 (the order specifies the preference for clients). The order is now AES256,
3705 AES128, 3DES, ARCFOUR128.
3707 31. Small patch to Sieve code - explicitly set From: when generating an
3708 autoreply.
3710 32. Exim crashed if a remote delivery caused a very long error message to be
3711 recorded - for instance if somebody sent an entire SpamAssassin report back
3712 as a large number of 550 error lines. This bug was coincidentally fixed by
3713 increasing the size of one of Exim's internal buffers (big_buffer) that
3714 happened as part of the Exiscan merge. However, to be on the safe side, I
3715 have made the code more robust (and fixed the comments that describe what
3716 is going on).
3718 33. Some experimental protocols are using DNS PTR records for new purposes. The
3719 keys for these records are domain names, not reversed IP addresses. The
3720 dnsdb PTR lookup now tests whether its key is an IP address. If not, it
3721 leaves it alone. Component reversal etc. now happens only for IP addresses.
3722 CAN-2005-0021
3724 34. The host_aton() function is supposed to be passed a string that is known
3725 to be a valid IP address. However, in the case of IPv6 addresses, it was
3726 not checking this. This is a hostage to fortune. Exim now panics and dies
3727 if the condition is not met. A case was found where this could be provoked
3728 from a dnsdb PTR lookup with an IPv6 address that had more than 8
3729 components; fortuitously, this particular loophole had already been fixed
3730 by change 4.50/55 or 4.44/33 above.
3732 If there are any other similar loopholes, the new check in host_aton()
3733 itself should stop them being exploited. The report I received stated that
3734 data on the command line could provoke the exploit when Exim was running as
3735 exim, but did not say which command line option was involved. All I could
3736 find was the use of -be with a bad dnsdb PTR lookup, and in that case it is
3737 running as the user.
3738 CAN-2005-0021
3740 35. There was a buffer overflow vulnerability in the SPA authentication code
3741 (which came originally from the Samba project). I have added a test to the
3742 spa_base64_to_bits() function which I hope fixes it.
3743 CAN-2005-0022
3745 36. The daemon start-up calls getloadavg() while still root for those OS that
3746 need the first call to be done as root, but it missed one case: when
3747 deliver_queue_load_max is set with deliver_drop_privilege. This is
3748 necessary for the benefit of the queue runner, because there is no re-exec
3749 when deliver_drop_privilege is set.
3751 37. Caching of lookup data for "hosts =" ACL conditions, when a named host list
3752 was in use, was not putting the data itself into the right store pool;
3753 consequently, it could be overwritten for a subsequent message in the same
3754 SMTP connection. (Fix 4.40/11 dealt with the non-cache case, but overlooked
3755 the caching.)
3757 38. Sometimes the final signoff response after QUIT could fail to get
3758 transmitted in the non-TLS case. Testing !tls_active instead of tls_active
3759 < 0 before doing a fflush(). This bug looks as though it goes back to the
3760 introduction of TLS in release 3.20, but "sometimes" must have been rare
3761 because the tests only now provoked it.
3764 Exim version 4.43
3765 -----------------
3767 1. Fixed a longstanding but relatively impotent bug: a long time ago, before
3768 PIPELINING, the function smtp_write_command() used to return TRUE or FALSE.
3769 Now it returns an integer. A number of calls were still expecting a T/F
3770 return. Fortuitously, in all cases, the tests worked in OK situations,
3771 which is the norm. However, things would have gone wrong on any write
3772 failures on the smtp file descriptor. This function is used when sending
3773 messages over SMTP and also when doing verify callouts.
3775 2. When Exim is called to do synchronous delivery of a locally submitted
3776 message (the -odf or -odi options), it no longer closes stderr before doing
3777 the delivery.
3779 3. Implemented the mua_wrapper option.
3781 4. Implemented mx_fail_domains and srv_fail_domains for the dnslookup router.
3783 5. Implemented the functions header_remove(), header_testname(),
3784 header_add_at_position(), and receive_remove_recipient(), and exported them
3785 to local_scan().
3787 6. If an ACL "warn" statement specified the addition of headers, Exim already
3788 inserted X-ACL-Warn: at the start if there was no header name. However, it
3789 was not making this test for the second and subsequent header lines if
3790 there were newlines in the string. This meant that an invalid header could
3791 be inserted if Exim was badly configured.
3793 7. Allow an ACL "warn" statement to add header lines at the start or after all
3794 the Received: headers, as well as at the end.
3796 8. Added the rcpt_4xx retry error code.
3798 9. Added postmaster_mailfrom=xxx to callout verification option.
3800 10. Added mailfrom=xxxx to the callout verification option, for verify=
3801 header_sender only.
3803 11. ${substr_1_:xxxx} and ${substr__3:xxxx} are now diagnosed as syntax errors
3804 (they previously behaved as ${substr_1_0:xxxx} and ${substr:_0_3:xxxx}).
3806 12. Inserted some casts to stop certain compilers warning when using pointer
3807 differences as field lengths or precisions in printf-type calls (mostly
3808 affecting debugging statements).
3810 13. Added optional readline() support for -be (dynamically loaded).
3812 14. Obscure bug fix: if a message error (e.g. 4xx to MAIL) happened within the
3813 same clock tick as a message's arrival, so that its received time was the
3814 same as the "first fail" time on the retry record, and that message
3815 remained on the queue past the ultimate address timeout, every queue runner
3816 would try a delivery (because it was past the ultimate address timeout) but
3817 after another failure, the ultimate address timeout, which should have then
3818 bounced the address, did not kick in. This was a "< instead of <=" error;
3819 in most cases the first failure would have been in the next clock tick
3820 after the received time, and all would be well.
3822 15. The special items beginning with @ in domain lists (e.g. @mx_any) were not
3823 being recognized when the domain list was tested by the match_domain
3824 condition in an expansion string.
3826 16. Added the ${str2b64: operator.
3828 17. Exim was always calling setrlimit() to set a large limit for the number of
3829 processes, without checking whether the existing limit was already
3830 adequate. (It did check for the limit on file descriptors.) Furthermore,
3831 errors from getrlimit() and setrlimit() were being ignored. Now they are
3832 logged to the main and panic logs, but Exim does carry on, to try to do its
3833 job under whatever limits there are.
3835 18. Imported PCRE 5.0.
3837 19. Trivial typo in log message " temporarily refused connection" (the leading
3838 space).
3840 20. If the log selector return_path_on_delivery was set and an address was
3841 redirected to /dev/null, the delivery process crashed because it assumed
3842 that a return path would always be set for a "successful" delivery. In this
3843 case, the whole delivery is bypassed as an optimization, and therefore no
3844 return path is set.
3846 21. Internal re-arrangement: the function for sending a challenge and reading
3847 a response while authentication was assuming a zero-terminated challenge
3848 string. It's now changed to take a pointer and a length, to allow for
3849 binary data in such strings.
3851 22. Added the cyrus_sasl authenticator (code supplied by MBM).
3853 23. Exim was not respecting finduser_retries when seeking the login of the
3854 uid under which it was called; it was always trying 10 times. (The default
3855 setting of finduser_retries is zero.) Also, it was sleeping after the final
3856 failure, which is pointless.
3858 24. Implemented tls_on_connect_ports.
3860 25. Implemented acl_smtp_predata.
3862 26. If the domain in control=submission is set empty, Exim assumes that the
3863 authenticated id is a complete email address when it generates From: or
3864 Sender: header lines.
3866 27. Added "#define SOCKLEN_T int" to OS/os.h-SCO and OS/os.h-SCO_SV. Also added
3867 definitions to OS/Makefile-SCO and OS/Makefile-SCO_SV that put basename,
3868 chown and chgrp in /bin and hostname in /usr/bin.
3870 28. Exim was keeping the "process log" file open after each use, just as it
3871 does for the main log. This opens the possibility of it remaining open for
3872 long periods when the USR1 signal hits a daemon. Occasional processlog
3873 errors were reported, that could have been caused by this. Anyway, it seems
3874 much more sensible not to leave this file open at all, so that is what now
3875 happens.
3877 29. The long-running daemon process does not normally write to the log once it
3878 has entered its main loop, and it closes the log before doing so. This is
3879 so that log files can straightforwardly be renamed and moved. However,
3880 there are a couple of unusual error situations where the daemon does write
3881 log entries, and I had neglected to close the log afterwards.
3883 30. The text of an SMTP error response that was received during a remote
3884 delivery was being truncated at 512 bytes. This is too short for some of
3885 the long messages that one sometimes sees. I've increased the limit to
3886 1024.
3888 31. It is now possible to make retry rules that apply only when a message has a
3889 specific sender, in particular, an empty sender.
3891 32. Added "control = enforce_sync" and "control = no_enforce_sync". This makes
3892 it possible to be selective about when SMTP synchronization is enforced.
3894 33. Added "control = caseful_local_part" and "control = "caselower_local_part".
3896 32. Implemented hosts_connection_nolog.
3898 33. Added an ACL for QUIT.
3900 34. Setting "delay_warning=" to disable warnings was not working; it gave a
3901 syntax error.
3903 35. Added mailbox_size and mailbox_filecount to appendfile.
3905 36. Added control = no_multiline_responses to ACLs.
3907 37. There was a bug in the logic of the code that waits for the clock to tick
3908 in the case where the clock went backwards by a substantial amount such
3909 that the microsecond fraction of "now" was more than the microsecond
3910 fraction of "then" (but the whole seconds number was less).
3912 38. Added support for the libradius Radius client library this is found on
3913 FreeBSD (previously only the radiusclient library was supported).
3916 Exim version 4.42
3917 -----------------
3919 1. When certain lookups returned multiple values in the form name=value, the
3920 quoting of the values was not always being done properly. Specifically:
3921 (a) If the value started with a double quote, but contained no whitespace,
3922 it was not quoted.
3923 (b) If the value contained whitespace other than a space character (i.e.
3924 tabs or newlines or carriage returns) it was not quoted.
3925 This fix has been applied to the mysql and pgsql lookups by writing a
3926 separate quoting function and calling it from the lookup code. The fix
3927 should probably also be applied to nisplus, ibase and oracle lookups, but
3928 since I cannot test any of those, I have not disturbed their existing code.
3930 2. A hit in the callout cache for a specific address caused a log line with no
3931 reason for rejecting RCPT. Now it says "Previous (cached) callout
3932 verification failure".
3934 3. There was an off-by-one bug in the queryprogram router. An over-long
3935 return line was truncated at 256 instead of 255 characters, thereby
3936 overflowing its buffer with the terminating zero. As well as fixing this, I
3937 have increased the buffer size to 1024 (and made a note to document this).
3939 4. If an interrupt, such as the USR1 signal that is send by exiwhat, arrives
3940 when Exim is waiting for an SMTP response from a remote server, Exim
3941 restarts its select() call on the socket, thereby resetting its timeout.
3942 This is not a problem when such interrupts are rare. Somebody set up a cron
3943 job to run exiwhat every 2 minutes, which is less than the normal select()
3944 timeout (5 or 10 minutes). This meant that the select() timeout never
3945 kicked in because it was always reset. I have fixed this by comparing the
3946 time when an interrupt arrives with the time at the start of the first call
3947 to select(). If more time than the timeout has elapsed, the interrupt is
3948 treated as a timeout.
3950 5. Some internal re-factoring in preparation for the addition of Sieve
3951 extensions (by MH). In particular, the "personal" test is moved to a
3952 separate function, and given an option for scanning Cc: and Bcc: (which is
3953 not set for Exim filters).
3955 6. When Exim created an email address using the login of the caller as the
3956 local part (e.g. when creating a From: or Sender: header line), it was not
3957 quoting the local part when it contained special characters such as @.
3959 7. Installed new OpenBSD configuration files.
3961 8. Reworded some messages for syntax errors in "and" and "or" conditions to
3962 try to make them clearer.
3964 9. Callout options, other than the timeout value, were being ignored when
3965 verifying sender addresses in header lines. For example, when using
3967 verify = header_sender/callout=no_cache
3969 the cache was (incorrectly) being used.
3971 10. Added a missing instance of ${EXE} to the exim_install script; this affects
3972 only the Cygwin environment.
3974 11. When return_path_on_delivery was set as a log selector, if different remote
3975 addresses in the same message used different return paths and parallel
3976 remote delivery occurred, the wrong values would sometimes be logged.
3977 (Whenever a remote delivery process finished, the return path value from
3978 the most recently started remote delivery process was logged.)
3980 12. RFC 3848 specifies standard names for the "with" phrase in Received: header
3981 lines when AUTH and/or TLS are in use. This is the "received protocol"
3982 field. Exim used to use "asmtp" for authenticated SMTP, without any
3983 indication (in the protocol name) for TLS use. Now it follows the RFC and
3984 uses "esmtpa" if the connection is authenticated, "esmtps" if it is
3985 encrypted, and "esmtpsa" if it is both encrypted and authenticated. These
3986 names appear in log lines as well as in Received: header lines.
3988 13. Installed MH's patches for Sieve to add the "copy" and "vacation"
3989 extensions, and comparison tests, and to fix some bugs.
3991 14. Changes to the "personal" filter test:
3993 (1) The test was buggy in that it was just doing the equivalent of
3994 "contains" tests on header lines. For example, if a user's address was
3995 anne@some.where, the "personal" test would incorrectly be true for
3997 To: susanne@some.where
3999 This test is now done by extracting each address from the header in turn,
4000 and checking the entire address. Other tests that are part of "personal"
4001 are now done using regular expressions (for example, to check local parts
4002 of addresses in From: header lines).
4004 (2) The list of non-personal local parts in From: addresses has been
4005 extended to include "listserv", "majordomo", "*-request", and "owner-*",
4006 taken from the Sieve specification recommendations.
4008 (3) If the message contains any header line starting with "List-" it is
4009 treated as non-personal.
4011 (4) The test for "circular" in the Subject: header line has been removed
4012 because it now seems ill-conceived.
4014 15. Minor typos in src/EDITME comments corrected.
4016 16. Installed latest exipick from John Jetmore.
4018 17. If headers_add on a router specified a text string that was too long for
4019 string_sprintf() - that is, longer than 8192 bytes - Exim panicked. The use
4020 of string_sprintf() is now avoided.
4022 18. $message_body_size was not set (it was always zero) when running the DATA
4023 ACL and the local_scan() function.
4025 19. For the "mail" command in an Exim filter, no default was being set for
4026 the once_repeat time, causing a random time value to be used if "once" was
4027 specified. (If the value happened to be <= 0, no repeat happened.) The
4028 default is now 0s, meaning "never repeat". The "vacation" command was OK
4029 (its default is 7d). It's somewhat surprising nobody ever noticed this bug
4030 (I found it when inspecting the code).
4032 20. There is now an overall timeout for performing a callout verification. It
4033 defaults to 4 times the callout timeout, which applies to individual SMTP
4034 commands during the callout. The overall timeout applies when there is more
4035 than one host that can be tried. The timeout is checked before trying the
4036 next host. This prevents very long delays if there are a large number of
4037 hosts and all are timing out (e.g. when the network connections are timing
4038 out). The value of the overall timeout can be changed by specifying an
4039 additional sub-option for "callout", called "maxwait". For example:
4041 verify = sender/callout=5s,maxwait=20s
4043 21. Add O_APPEND to the open() call for maildirsize files (Exim already seeks
4044 to the end before writing, but this should make it even safer).
4046 22. Exim was forgetting that it had advertised PIPELINING for the second and
4047 subsequent messages on an SMTP connection. It was also not resetting its
4048 memory on STARTTLS and an internal HELO.
4050 23. When Exim logs an SMTP synchronization error within a session, it now
4051 records whether PIPELINING has been advertised or not.
4053 24. Added 3 instances of "(long int)" casts to time_t variables that were being
4054 formatted using %ld, because on OpenBSD (and perhaps others), time_t is int
4055 rather than long int.
4057 25. Installed the latest Cygwin configuration files from the Cygwin maintainer.
4059 26. Added the never_mail option to autoreply.
4062 Exim version 4.41
4063 -----------------
4065 1. A reorganization of the code in order to implement 4.40/8 caused a daemon
4066 crash if the getsockname() call failed; this can happen if a connection is
4067 closed very soon after it is established. The problem was simply in the
4068 order in which certain operations were done, causing Exim to try to write
4069 to the SMTP stream before it had set up the file descriptor. The bug has
4070 been fixed by making things happen in the correct order.
4073 Exim version 4.40
4074 -----------------
4076 1. If "drop" was used in a DATA ACL, the SMTP output buffer was not flushed
4077 before the connection was closed, thus losing the rejection response.
4079 2. Commented out the definition of SOCKLEN_T in os.h-SunOS5. It is needed for
4080 some early Solaris releases, but causes trouble in current releases where
4081 socklen_t is defined.
4083 3. When std{in,out,err} are closed, re-open them to /dev/null so that they
4084 always exist.
4086 4. Minor refactoring of os.c-Linux to avoid compiler warning when IPv6 is not
4087 configured.
4089 5. Refactoring in expand.c to improve memory usage. Pre-allocate a block so
4090 that releasing the top of it at the end releases what was used for sub-
4091 expansions (unless the block got too big). However, discard this block if
4092 the first thing is a variable or header, so that we can use its block when
4093 it is dynamic (useful for very large $message_headers, for example).
4095 6. Lookups now cache *every* query, not just the most recent. A new, separate
4096 store pool is used for this. It can be recovered when all lookup caches are
4097 flushed. Lookups now release memory at the end of their result strings.
4098 This has involved some general refactoring of the lookup sources.
4100 7. Some code has been added to the store_xxx() functions to reduce the amount
4101 of flapping under certain conditions.
4103 8. log_incoming_interface used to affect only the <= reception log lines. Now
4104 it causes the local interface and port to be added to several more SMTP log
4105 lines, for example "SMTP connection from", and rejection lines.
4107 9. The Sieve author supplied some patches for the doc/README.SIEVE file.
4109 10. Added a conditional definition of _BSD_SOCKLEN_T to os.h-Darwin.
4111 11. If $host_data was set by virtue of a hosts lookup in an ACL, its value
4112 could be overwritten at the end of the current message (or the start of a
4113 new message if it was set in a HELO ACL). The value is now preserved for
4114 the duration of the SMTP connection.
4116 12. If a transport had a headers_rewrite setting, and a matching header line
4117 contained an unqualified address, that address was qualified, even if it
4118 did not match any rewriting rules. The underlying bug was that the values
4119 of the flags that permit the existence of unqualified sender and recipient
4120 addresses in header lines (set by {sender,recipient}_unqualified_hosts for
4121 non-local messages, and by -bnq for local messages) were not being
4122 preserved with the message after it was received.
4124 13. When Exim was logging an SMTP synchronization error, it could sometimes log
4125 "next input=" as part of the text comprising the host identity instead of
4126 the correct text. The code was using the same buffer for two different
4127 strings. However, depending on which order the printing function evaluated
4128 its arguments, the bug did not always show up. Under Linux, for example, my
4129 test suite worked just fine.
4131 14. Exigrep contained a use of Perl's "our" scoping after change 4.31/70. This
4132 doesn't work with some older versions of Perl. It has been changed to "my",
4133 which in any case is probably the better facility to use.
4135 15. A really picky compiler found some instances of statements for creating
4136 error messages that either had too many or two few arguments for the format
4137 string.
4139 16. The size of the buffer for calls to the DNS resolver has been increased
4140 from 1024 to 2048. A larger buffer is needed when performing PTR lookups
4141 for addresses that have a lot of PTR records. This alleviates a problem; it
4142 does not fully solve it.
4144 17. A dnsdb lookup for PTR records that receives more data than will fit in the
4145 buffer now truncates the list and logs the incident, which is the same
4146 action as happens when Exim is looking up a host name and its aliases.
4147 Previously in this situation something unpredictable would happen;
4148 sometimes it was "internal error: store_reset failed".
4150 18. If a server dropped the connection unexpectedly when an Exim client was
4151 using GnuTLS and trying to read a response, the client delivery process
4152 crashed while trying to generate an error log message.
4154 19. If a "warn" verb in an ACL added multiple headers to a message in a single
4155 string, for example:
4157 warn message = H1: something\nH2: something
4159 the text was added as a single header line from Exim's point of view
4160 though it ended up OK in the delivered message. However, searching for the
4161 second and subsequent header lines using $h_h2: did not work. This has been
4162 fixed. Similarly, if a system filter added multiple headers in this way,
4163 the routers could not see them.
4165 20. Expanded the error message when iplsearch is called with an invalid key to
4166 suggest using net-iplsearch in a host list.
4168 21. When running tests using -bh, any delays imposed by "delay" modifiers in
4169 ACLs are no longer actually imposed (and a message to that effect is
4170 output).
4172 22. If a "gecos" field in a passwd entry contained escaped characters, in
4173 particular, if it contained a \" sequence, Exim got it wrong when building
4174 a From: or a Sender: header from that name. A second bug also caused
4175 incorrect handling when an unquoted " was present following a character
4176 that needed quoting.
4178 23. "{crypt}" as a password encryption mechanism for a "crypteq" expansion item
4179 was not being matched caselessly.
4181 24. Arranged for all hyphens in the exim.8 source to be escaped with
4182 backslashes.
4184 25. Change 16 of 4.32, which reversed 71 or 4.31 didn't quite do the job
4185 properly. Recipient callout cache records were still being keyed to include
4186 the sender, even when use_sender was set false. This led to far more
4187 callouts that were necessary. The sender is no longer included in the key
4188 when use_sender is false.
4190 26. Added "control = submission" modifier to ACLs.
4192 27. Added the ${base62d: operator to decode base 62 numbers.
4194 28. dnsdb lookups can now access SRV records.
4196 29. CONFIGURE_OWNER can be set at build time to define an alternative owner for
4197 the configuration file.
4199 30. The debug message "delivering xxxxxx-xxxxxx-xx" is now output in verbose
4200 (-v) mode. This makes the output for a verbose queue run more intelligible.
4202 31. Added a use_postmaster feature to recipient callouts.
4204 32. Added the $body_zerocount variable, containing the number of binary zero
4205 bytes in the message body.
4207 33. The time of last modification of the "new" subdirectory is now used as the
4208 "mailbox time last read" when there is a quota error for a maildir
4209 delivery.
4211 34. Added string comparison operators lt, lti, le, lei, gt, gti, ge, gei.
4213 35. Added +ignore_unknown as a special item in host lists.
4215 36. Code for decoding IPv6 addresses in host lists is now included, even if
4216 IPv6 support is not being compiled. This fixes a bug in which an IPv6
4217 address was recognized as an IP address, but was then not correctly decoded
4218 into binary, causing unexpected and incorrect effects when compared with
4219 another IP address.
4222 Exim version 4.34
4223 -----------------
4225 1. Very minor rewording of debugging text in manualroute to say "list of
4226 hosts" instead of "hostlist".
4228 2. If verify=header_syntax was set, and a header line with an unqualified
4229 address (no domain) and a large number of spaces between the end of the
4230 name and the colon was received, the reception process suffered a buffer
4231 overflow, and (when I tested it) crashed. This was caused by some obsolete
4232 code that should have been removed. The fix is to remove it!
4234 3. When running in the test harness, delay a bit after writing a bounce
4235 message to get a bit more predictability in the log output.
4237 4. Added a call to search_tidyup() just before forking a reception process. In
4238 theory, someone could use a lookup in the expansion of smtp_accept_max_
4239 per_host which, without the tidyup, could leave open a database connection.
4241 5. Added the variables $recipient_data and $sender_data which get set from a
4242 lookup success in an ACL "recipients" or "senders" condition, or a router
4243 "senders" option, similar to $domain_data and $local_part_data.
4245 6. Moved the writing of debug_print from before to after the "senders" test
4246 for routers.
4248 7. Change 4.31/66 (moving the time when the Received: is generated) caused
4249 problems for message scanning, either using a data ACL, or using
4250 local_scan() because the Received: header was not generated till after they
4251 were called (in order to set the time as the time of reception completion).
4252 I have revised the way this works. The header is now generated after the
4253 body is received, but before the ACL or local_scan() are called. After they
4254 are run, the timestamp in the header is updated.
4257 Exim version 4.33
4258 -----------------
4260 1. Change 4.24/6 introduced a bug because the SIGALRM handler was disabled
4261 before starting a queue runner without re-exec. This happened only when
4262 deliver_drop_privilege was set or when the Exim user was set to root. The
4263 effect of the bug was that timeouts during subsequent deliveries caused
4264 crashes instead of being properly handled. The handler is now left at its
4265 default (and expected) setting.
4267 2. The other case in which a daemon avoids a re-exec is to deliver an incoming
4268 message, again when deliver_drop_privilege is set or Exim is run as root.
4269 The bug described in (1) was not present in this case, but the tidying up
4270 of the other signals was missing. I have made the two cases consistent.
4272 3. The ignore_target_hosts setting on a manualroute router was being ignored
4273 for hosts that were looked up using the /MX notation.
4275 4. Added /ignore=<ip list> feature to @mx_any, @mx_primary, and @mx_secondary
4276 in domain lists.
4278 5. Change 4.31/55 was buggy, and broke when there was a rewriting rule that
4279 operated on the sender address. After changing the $sender_address to <>
4280 for the sender address verify, Exim was re-instated it as the original
4281 (before rewriting) address, but remembering that it had rewritten it, so it
4282 wasn't rewriting it again. This bug also had the effect of breaking the
4283 sender address verification caching when the sender address was rewritten.
4285 6. The ignore_target_hosts option was being ignored by the ipliteral router.
4286 This has been changed so that if the ip literal address matches
4287 ignore_target_hosts, the router declines.
4289 7. Added expansion conditions match_domain, match_address, and match_local_
4290 part (NOT match_host).
4292 8. The placeholder for the Received: header didn't have a length field set.
4294 9. Added code to Exim itself and to exim_lock to test for a specific race
4295 condition that could lead to file corruption when using MBX delivery. The
4296 issue is with the lockfile that is created in /tmp. If this file is removed
4297 after a process has opened it but before that process has acquired a lock,
4298 there is the potential for a second process to recreate the file and also
4299 acquire a lock. This could lead to two Exim processes writing to the file
4300 at the same time. The added code performs the same test as UW imapd; it
4301 checks after acquiring the lock that its file descriptor still refers to
4302 the same named file.
4304 10. The buffer for building added header lines was of fixed size, 8192 bytes.
4305 It is now parameterized by HEADER_ADD_BUFFER_SIZE and this can be adjusted
4306 when Exim is built.
4308 11. Added the smtp_active_hostname option. If used, this will typically be made
4309 to depend on the incoming interface address. Because $interface_address is
4310 not set up until the daemon has forked a reception process, error responses
4311 that can happen earlier (such as "too many connections") no longer contain
4312 a host name.
4314 12. If an expansion in a condition on a "warn" statement fails because a lookup
4315 defers, the "warn" statement is abandoned, and the next ACL statement is
4316 processed. Previously this caused the whole ACL to be aborted.
4318 13. Added the iplsearch lookup type.
4320 14. Added ident_timeout as a log selector.
4322 15. Added tls_certificate_verified as a log selector.
4324 16. Added a global option tls_require_ciphers (compare the smtp transport
4325 option of the same name). This controls incoming TLS connections.
4327 17. I finally figured out how to make tls_require_ciphers do a similar thing
4328 in GNUtls to what it does in OpenSSL, that is, set up an appropriate list
4329 before starting the TLS session.
4331 18. Tabs are now shown as \t in -bP output.
4333 19. If the log selector return_path_on_delivery was set, Exim crashed when
4334 bouncing a message because it had too many Received: header lines.
4336 20. If two routers both had headers_remove settings, and the first one included
4337 a superfluous trailing colon, the final name in the first list and the
4338 first name in the second list were incorrectly joined into one item (with a
4339 colon in the middle).
4342 Exim version 4.32
4343 -----------------
4345 1. Added -C and -D options to the exinext utility, mainly to make it easier
4346 to include in the automated testing, but these could be helpful when
4347 multiple configurations are in use.
4349 2. The exinext utility was not formatting the output nicely when there was
4350 an alternate port involved in the retry record key, nor when there was a
4351 message id as well (for retries that were specific to a specific message
4352 and a specific host). It was also confused by IPv6 addresses, because of
4353 the additional colons they contain. I have fixed the IPv4 problem, and
4354 patched it up to do a reasonable job for IPv6.
4356 3. When there is an error after a MAIL, RCPT, or DATA SMTP command during
4357 delivery, the log line now contains "pipelined" if PIPELINING was used.
4359 4. An SMTP transport process used to panic and die if the bind() call to set
4360 an explicit outgoing interface failed. This has been changed; it is now
4361 treated in the same way as a connect() failure.
4363 5. A reference to $sender_host_name in the part of a conditional expansion
4364 that was being skipped was still causing a DNS lookup. This no longer
4365 occurs.
4367 6. The def: expansion condition was not recognizing references to header lines
4368 that used bh_ and bheader_.
4370 7. Added the _cache feature to named lists.
4372 8. The code for checking quota_filecount in the appendfile transport was
4373 allowing one more file than it should have been.
4375 9. For compatibility with Sendmail, the command line option
4377 -prval:sval
4379 is equivalent to
4381 -oMr rval -oMs sval
4383 and sets the incoming protocol and host name (for trusted callers). The
4384 host name and its colon can be omitted when only the protocol is to be set.
4385 Note the Exim already has two private options, -pd and -ps, that refer to
4386 embedded Perl. It is therefore impossible to set a protocol value of "d" or
4387 "s", but I don't think that's a major issue.
4389 10. A number of refactoring changes to the code, none of which should affect
4390 Exim's behaviour:
4392 (a) The number of logging options was getting close to filling up the
4393 32-bit word that was used as a bit map. I have split them into two classes:
4394 those that are passed in the argument to log_write(), and those that are
4395 only ever tested independently outside of that function. These are now in
4396 separate 32-bit words, so there is plenty of room for expansion again.
4397 There is no change in the user interface or the logging behaviour.
4399 (b) When building, for example, log lines, the code previously used a
4400 macro that called string_cat() twice, in order to add two strings. This is
4401 not really sufficiently general. Furthermore, there was one instance where
4402 it was actually wrong because one of the argument was used twice, and in
4403 one call a function was used. (As it happened, calling the function twice
4404 did not affect the overall behaviour.) The macro has been replaced by a
4405 function that can join an arbitrary number of extra strings onto a growing
4406 string.
4408 (c) The code for expansion conditions now uses a table and a binary chop
4409 instead of a serial search (which was left over from when there were very
4410 few conditions). Also, it now recognizes conditions like "pam" even when
4411 the relevant support is not compiled in: a suitably worded error message is
4412 given if an attempt is made to use such a condition.
4414 11. Added ${time_interval:xxxxx}.
4416 12. A bug was causing one of the ddress fields not to be passed back correctly
4417 from remote delivery subprocesses. The field in question was not being
4418 subsequently used, so this caused to problems in practice.
4420 13. Added new log selectors queue_time and deliver_time.
4422 14. Might have fixed a bug in maildirsizefile handling that threw up
4423 "unexpected character" debug warnings, and recalculated the data
4424 unnecessarily. In any case, I expanded the warning message to give more
4425 information.
4427 15. Added the message "Restricted characters in address" to the statements in
4428 the default ACL that block characters like @ and % in local parts.
4430 16. Change 71 for release 4.31 proved to be much less benign that I imagined.
4431 Three changes have been made:
4433 (a) There was a serious bug; a negative response to MAIL caused the whole
4434 recipient domain to be cached as invalid, thereby blocking all messages
4435 to all local parts at the same domain, from all senders. This bug has
4436 been fixed. The domain is no longer cached after a negative response to
4437 MAIL if the sender used is not empty.
4439 (b) The default behaviour of using MAIL FROM:<> for recipient callouts has
4440 been restored.
4442 (c) A new callout option, "use_sender" has been added for people who want
4443 the modified behaviour.
4446 Exim version 4.31
4447 -----------------
4449 1. Removed "EXTRALIBS=-lwrap" from OS/Makefile-Unixware7 on the advice of
4450 Larry Rosenman.
4452 2. Removed "LIBS = -lresolv" from OS/Makefile-Darwin as it is not needed, and
4453 indeed breaks things for older releases.
4455 3. Added additional logging to the case where there is a problem reading data
4456 from a filter that is running in a subprocess using a pipe, in order to
4457 try to track down a specific problem.
4459 4. Testing facility fudge: when running in the test harness and attempting
4460 to connect to 10.x.x.x (expecting a connection timeout) I'm now sometimes
4461 getting "No route to host". Convert this to a timeout.
4463 5. Define ICONV_ARG2_TYPE as "char **" for Unixware7 to avoid compiler
4464 warning.
4466 6. Some OS don't have socklen_t but use size_t instead. This affects the
4467 fifth argument of getsockopt() amongst other things. This is now
4468 configurable by a macro called SOCKLEN_T which defaults to socklen_t, but
4469 can be set for individual OS. I have set it for SunOS5, OSF1, and
4470 Unixware7. Current versions of SunOS5 (aka Solaris) do have socklen_t, but
4471 some earlier ones do not.
4473 7. Change 4.30/15 was not doing the test caselessly.
4475 8. The standard form for an IPv6 address literal was being rejected by address
4476 parsing in, for example, MAIL and RCPT commands. An example of this kind of
4477 address is [IPv6:2002:c1ed:8229:10:202:2dff:fe07:a42a]. Exim now accepts
4478 this, as well as the form without the "IPv6" on the front (but only when
4479 address literals are enabled, of course).
4481 9. Added some casts to avoid compiler warnings in OS/os.c-Linux.
4483 10. Exim crashed if a message with an empty sender address specified by -f
4484 encountered a router with an errors_to setting. This could be provoked only
4485 by a command such as
4487 exim -f "" ...
4489 where an empty string was supplied; "<>" did not hit this bug.
4491 11. Installed PCRE release 4.5.
4493 12. If EHLO/HELO was rejected by an ACL, the value of $sender_helo_name
4494 remained set. It is now erased.
4496 13. exiqgrep wasn't working on MacOS X because it didn't correctly compute
4497 times from message ids (which are base 36 rather than the normal 62).
4499 14. "Expected" SMTP protocol errors that can arise when PIPELINING is in use
4500 were being counted as actual protocol errors, and logged if the log
4501 selector +smtp_protocol_error was set. One cannot be perfect in this test,
4502 but now, if PIPELINING has been advertised, RCPT following a rejected MAIL,
4503 and DATA following a set of rejected RCPTs do not count as protocol errors.
4504 In other words, Exim assumes they were pipelined, though this may not
4505 actually be the case. Of course, in all cases the client gets an
4506 appropriate error code.
4508 15. If a lookup fails in an ACL condition, a message about the failure may
4509 be available; it is used if testing the ACL cannot continue, because most
4510 such messages specify what the cause of the deferral is. However, some
4511 messages (e.g. "MYSQL: no data found") do not cause a defer. There was bug
4512 that caused an old message to be retained and used if a later statement
4513 caused a defer, replacing the real cause of the deferral.
4515 16. If an IP address had so many PTR records that the DNS lookup buffer
4516 was not large enough to hold them, Exim could crash while trying to process
4517 the truncated data. It now detects and logs this case.
4519 17. Further to 4.21/58, another change has been made: if (and only if) the
4520 first line of a message (the first header line) ends with CRLF, a bare LF
4521 in a subsequent header line has a space inserted after it, so as not to
4522 terminate the header.
4524 18. Refactoring: tidied an ugly bit of code in appendfile that copied data
4525 unnecessarily, used atoi() instead of strtol(), and didn't check the
4526 termination when getting file sizes from file names by regex.
4528 19. Completely re-implemented the support for maildirsize files, in the light
4529 of a number of problems with the previous contributed implementation
4530 (4.30/29). In particular:
4532 . If the quota is zero, the maildirsize file is maintained, but no quota is
4533 imposed.
4535 . If the maildir directory does not exist, it is created before any attempt
4536 to write a maildirsize file.
4538 . The quota value in the file is just a cache; if the quota is changed in
4539 the transport, the new value overrides.
4541 . A regular expression is available for excluding directories from the
4542 count.
4544 20. The autoreply transport checks the characters in options that define the
4545 message's headers; it allows continued headers, but it was checking with
4546 isspace() after an embedded newline instead of explicitly looking for a
4547 space or a tab.
4549 21. If all the "regular" hosts to which an address was routed had passed their
4550 expiry times, and had not reached their retry times, the address was
4551 bounced, even if fallback hosts were defined. Now Exim should go on to try
4552 the fallback hosts.
4554 22. Increased buffer sizes in the callout code from 1024 to 4096 to match the
4555 equivalent code in the SMTP transport. Some hosts send humungous responses
4556 to HELO/EHLO, more than 1024 it seems.
4558 23. Refactoring: code in filter.c used (void *) for "any old type" but this
4559 gives compiler warnings in some environments. I've now done it "properly",
4560 using a union.
4562 24. The replacement for inet_ntoa() that is used with gcc on IRIX systems
4563 (because of problems with the built-in one) was declared to return uschar *
4564 instead of char *, causing compiler failure.
4566 25. Fixed a file descriptor leak when processing alias/forward files.
4568 26. Fixed a minor format string issue in dbfn.c.
4570 27. Typo in exim.c: ("dmbnz" for "dbmnz").
4572 28. If a filter file refered to $h_xxx or $message_headers, and the headers
4573 contained RFC 2047 "words", Exim's memory could, under certain conditions,
4574 become corrupted.
4576 29. When a sender address is verified, it is cached, to save repeating the test
4577 when there is more than one recipient in a message. However, when the
4578 verification involves a callout, it is possible for different callout
4579 options to be set for different recipients. It is too complicated to keep
4580 track of this in the cache, so now Exim always runs a verification when a
4581 callout is required, relying on the callout cache for the optimization.
4582 The overhead is duplication of the address routing, but this should not be
4583 too great.
4585 30. Fixed a bug in callout caching. If a RCPT command caused the sender address
4586 to be verified with callout=postmaster, and the main callout worked but the
4587 postmaster check failed, the verification correctly failed. However, if a
4588 subsequent RCPT command asked for sender verification *without* the
4589 postmaster check, incorrect caching caused this verification also to fail,
4590 incorrectly.
4592 31. Exim caches DNS lookup failures so as to avoid multiple timeouts; however,
4593 it was not caching the DNS options (qualify_single, search_parents) that
4594 were used when the lookup failed. A subsequent lookup with different
4595 options therefore always gave the same answer, though there were cases
4596 where it should not have. (Example: a "domains = !$mx_any" option on a
4597 dnslookup router: the "domains" option is always processed without any
4598 widening, but the router might have qualify_single set.) Now Exim uses the
4599 cached value only when the same options are set.
4601 32. Added John Jetmore's "exipick" utility to the distribution.
4603 33. GnuTLS: When an attempt to start a TLS session fails for any reason other
4604 than a timeout (e.g. a certificate is required, and is not provided), an
4605 Exim server now closes the connection immediately. Previously it waited for
4606 the client to close - but if the client is SSL, it seems that they each
4607 wait for each other, leading to a delay before one of them times out.
4609 34: GnuTLS: Updated the code to use the new GnuTLS 1.0.0 API. I have not
4610 maintained 0.8.x compatibility because I don't think many are using it, and
4611 it is clearly obsolete.
4613 35. Added TLS support for CRLs: a tls_crl global option and one for the smtp
4614 transport.
4616 36. OpenSSL: $tls_certificate_verified was being set to 1 even if the
4617 client certificate was expired. A simple patch fixes this, though I don't
4618 understand the full logic of why the verify callback is called multiple
4619 times.
4621 37. OpenSSL: a patch from Robert Roselius: "Enable client-bug workaround.
4622 Versions of OpenSSL as of 0.9.6d include a 'CBC countermeasure' feature,
4623 which causes problems with some clients (such as the Certicom SSL Plus
4624 library used by Eudora). This option, SSL_OP_DONT_INSERT_EMPTY_FRAGMENTS,
4625 disables the coutermeasure allowing Eudora to connect."
4627 38. Exim was not checking that a write() to a log file succeeded. This could
4628 lead to Bad Things if a log got too big, in particular if it hit a file
4629 size limit. Exim now panics and dies if it cannot write to a log file, just
4630 as it does if it cannot open a log file.
4632 39. Modified OS/Makefile-Linux so that it now contains
4636 The two -D definitions ensure that Exim is compiled with large file
4637 support, which makes it possible to handle log files that are bigger than
4638 2^31.
4640 40. Fixed a subtle caching bug: if (in an ACL or a set of routers, for
4641 instance) a domain was checked against a named list that involved a lookup,
4642 causing $domain_data to be set, then another domain was checked against the
4643 same list, then the first domain was re-checked, the value of $domain_data
4644 after the final check could be wrong. In particular, if the second check
4645 failed, it could be set empty. This bug probably also applied to
4646 $localpart_data.
4648 41. The strip_trailing_dot option was not being applied to the address given
4649 with the -f command-line option.
4651 42. The code for reading a message's header from the spool was incrementing
4652 $received_count, but never initializing it. This meant that the value was
4653 incorrect (doubled) while delivering a message in the same process in which
4654 it was received. In the most common configuration of Exim, this never
4655 happens - a fresh exec is done - but it can happen when
4656 deliver_drop_privilege is set.
4658 43. When Exim logs an SMTP synchronization error - client data sent too soon -
4659 it now includes up to 150 characters of the unexpected data in the log
4660 line.
4662 44. The exim_dbmbuild utility uses fixed size buffers for reading input lines
4663 and building data strings. The size of both of these buffers was 10 000
4664 bytes - far larger than anybody would *ever* want, thought I. Needless to
4665 say, somebody hit the limit. I have increased the maximum line length to
4666 20 000 and the maximum data length of concatenated lines to 100 000. I have
4667 also fixed two bugs, because there was no checking on these buffers. Tsk,
4668 tsk. Now exim_dbmbuild gives a message and exits with an error code if a
4669 buffer is too small.
4671 45. The exim_dbmbuild utility did not support quoted keys, as Exim does in
4672 lsearch lookups. Now it does.
4674 46. When parsing a route_list item in a manualroute router, a fixed-length
4675 buffer was used for the list of hosts. I made this 1024 bytes long,
4676 thinking that nobody would ever have a list of hosts that long. Wrong.
4677 Somebody had a whole pile of complicated expansion conditions, and the
4678 string was silently truncated, leading to an expansion error. It turns out
4679 that it is easier to change to an unlimited length (owing to other changes
4680 that have happened since this code was originally written) than to build
4681 structure for giving a limitation error. The length of the item that
4682 expands into the list of hosts is now unlimited.
4684 47. The lsearch lookup could not handle data where the length of text line was
4685 more than 4095 characters. Such lines were truncated, leading to shortened
4686 data being returned. It should now handle lines of any length.
4688 48. Minor wording revision: "cannot test xxx in yyy ACL" becomes "cannot test
4689 xxx condition in yyy ACL" (e.g. "cannot test domains condition in DATA
4690 ACL").
4692 49. Cosmetic tidy to scripts like exicyclog that are generated by globally
4693 replacing strings such as BIN_DIRECTORY in a source file: the replacement
4694 no longer happens in comment lines. A list of replacements is now placed
4695 at the head of all of the source files, except those whose only change is
4696 to replace PERL_COMMAND in the very first #! line.
4698 50. Replaced the slow insertion sort in queue.c, for sorting the list of
4699 messages on the queue, with a bottom-up merge sort, using code contributed
4700 by Michael Haardt. This should make operations like -bp somewhat faster on
4701 large queues. It won't affect queue runners, except when queue_run_in_order
4702 is set.
4704 51. Installed eximstats 1.31 in the distribution.
4706 52. Added support for SRV lookups to the dnslookup router.
4708 53. If an ACL referred to $message_body or $message_body_end, the value was not
4709 reset for any messages that followed in the same SMTP session.
4711 54. The store-handling optimization for building very long strings was not
4712 differentiating between the different store pools. I don't think this
4713 actually made any difference in practice, but I've tidied it.
4715 55. While running the routers to verify a sender address, $sender_address
4716 was still set to the sender address. This is wrong, because when routing to
4717 send a bounce to the sender, it would be empty. Therefore, I have changed
4718 it so that, while verifying a sender address, $sender_address is set to <>.
4719 (There is no change to what happens when verifying a recipient address.)
4721 56. After finding MX (or SRV) records, Exim was doing a DNS lookup for the
4722 target A or AAAA records (if not already returned) without resetting the
4723 qualify_single or search_parents options of the DNS resolver. These are
4724 inappropriate in this case because the targets of MX and SRV records must
4725 be FQDNs. A broken DNS record could cause trouble if it happened to have a
4726 target that, when qualified, matched something in the local domain. These
4727 two options are now turned off when doing these lookups.
4729 57. It seems that at least some releases of Reiserfs (which does not have the
4730 concept of a fixed number of inodes) returns zero and not -1 for the
4731 number of available inodes. This interacted badly with check_spool_inodes,
4732 which assumed that -1 was the "no such thing" setting. What I have done is
4733 to check that the total number of inodes is greater than zero before doing
4734 the test of how many are available.
4736 58. When a "warn" ACL statement has a log_message modifier, the message is
4737 remembered, and not repeated. This is to avoid a lot of repetition when a
4738 message has many recipients that cause the same warning to be written.
4739 Howewer, Exim was preserving the list of already written lines for an
4740 entire SMTP session, which doesn't seem right. The memory is now reset if a
4741 new message is started.
4743 59. The "rewrite" debugging flag was not showing the result of rewriting in the
4744 debugging output unless log_rewrite was also set.
4746 60. Avoid a compiler warning on 64-bit systems in dsearch.c by avoiding the use
4747 of (int)(handle) when we know that handle contains (void *)(-1).
4749 61. The Exim daemon panic-logs an error return when it closes the incoming
4750 connection. However "connection reset by peer" seems to be common, and
4751 isn't really an error worthy of noting specially, so that particular error
4752 is no long logged.
4754 62. When Exim is trying to find all the local interfaces, it used to panic and
4755 die if the ioctl to get the interface flags failed. However, it seems that
4756 on at least one OS (Solaris 9) it is possible to have an interface that is
4757 included in the list of interfaces, but for which you get a failure error
4758 for this call. This happens when the interface is not "plumbed" into a
4759 protocol (i.e. neither IPv4 nor IPv6). I've changed the code so that a
4760 failure of the "get flags" call assumes that the interface is down.
4762 63. Added a ${eval10: operator, which assumes all numbers are decimal. This
4763 makes life easier for people who are doing arithmetic on fields extracted
4764 from dates, where you often get leading zeros that should not be
4765 interpreted as octal.
4767 64. Added qualify_domain to the redirect router, to override the global
4768 setting.
4770 65. If a pathologically long header line contained very many addresses (the
4771 report of this problem mentioned 10 000) and each of them was rewritten,
4772 Exim could use up a very large amount of memory. (It kept on making new
4773 copies of the header line as it rewrote, and never released the old ones.)
4774 At the expense of a bit more processing, the header rewriting function has
4775 been changed so that it no longer eats memory in this way.
4777 66. The generation of the Received: header has been moved from the time that a
4778 message starts to be received, to the time that it finishes. The timestamp
4779 in the Received: header should now be very close to that of the <= log
4780 line. There are two side-effects of this change:
4782 (a) If a message is rejected by a DATA or non-SMTP ACL or local_scan(), the
4783 logged header lines no longer include the local Received: line, because
4784 it has not yet been created. The same applies to a copy of the message
4785 that is returned to a non-SMTP sender when a message is rejected.
4787 (b) When a filter file is tested using -bf, no additional Received: header
4788 is added to the test message. After some thought, I decided that this
4789 is a bug fix.
4791 This change does not affect the value of $received_for. It is still set
4792 after address rewriting, but before local_scan() is called.
4794 67. Installed the latest Cygwin-specific files from the Cygwin maintainer.
4796 68. GnuTLS: If an empty file is specified for tls_verify_certificates, GnuTLS
4797 gave an unhelpful panic error message, and a defer error. I have managed to
4798 change this behaviour so that it now rejects any supplied certificate,
4799 which seems right, as the list of acceptable certificates is empty.
4801 69. OpenSSL: If an empty file is specified for tls_verify_certificates, OpenSSL
4802 gave an unhelpful defer error. I have not managed to make this reject any
4803 supplied certificates, but the error message it gives is "no certificate
4804 supplied", which is not helpful.
4806 70. exigrep's output now also includes lines that are not associated with any
4807 message, but which match the given pattern. Implemented by a patch from
4808 Martin Sluka, which also tidied up the Perl a bit.
4810 71. Recipient callout verification, like sender verification, was using <> in
4811 the MAIL FROM command. This isn't really the right thing, since the actual
4812 sender may affect whether the remote host accepts the recipient or not. I
4813 have changed it to use the actual sender in the callout; this means that
4814 the cache record is now keyed on a recipient/sender pair, not just the
4815 recipient address. There doesn't seem to be a real danger of callout loops,
4816 since a callout by the remote host to check the sender would use <>.
4817 [SEE ABOVE: changed after hitting problems.]
4819 72. Exim treats illegal SMTP error codes that do not begin with 4 or 5 as
4820 temporary errors. However, in the case of such a code being given after
4821 the end of a data transmission (i.e. after ".") Exim was failing to write
4822 a retry record for the message. (Yes, there was some broken host that was
4823 actually sending 8xx at this point.)
4825 73. An unknown lookup type in a host list could cause Exim to panic-die when
4826 the list was checked. (An example that provoked this was putting <; in the
4827 middle of a list instead of at the start.) If this happened during a DATA
4828 ACL check, a -D file could be left lying around. This kind of configuration
4829 error no longer causes Exim to die; instead it causes a defer errror. The
4830 incident is still logged to the main and panic logs.
4832 74. Buglet left over from Exim 3 conversion. The message "too many messages
4833 in one connection" was written to the rejectlog but not the mainlog, except
4834 when address rewriting (yes!) was being logged.
4836 75. Added write_rejectlog option.
4838 76. When a system filter was run not as root (that is, when system_filter_user
4839 was set), the values of the $n variables were not being returned to the
4840 main process; thus, they were not subsequently available in the $sn
4841 variables.
4843 77. Added +return_path_on_delivery log selector.
4845 78. A connection timeout was being treated differently from recipients deferred
4846 when testing hosts_max_try with a message that was older than the host's
4847 retry timeout. (The host should not be counted, thus allowing all hosts to
4848 be tried at least once before bouncing.) This may have been the cause of an
4849 occasionally reported bug whereby a message would remain on the queue
4850 longer than the retry timeout, but would be bounced if a delivery was
4851 forced. I say "may" because I never totally pinned down the problem;
4852 setting up timeout/retry tests is difficult. See also the next item.
4854 79. The ultimate address timeout was not being applied to errors that involved
4855 a combination of host plus message (for example, a timeout on a MAIL
4856 command). When an address resolved to a number of possible hosts, and they
4857 were not all tried for each delivery (e.g. because of hosts_max_try), a
4858 message could remain on the queue longer than the retry timeout.
4860 80. Sieve bug: "stop" inside "elsif" was broken. Applied a patch from Michael
4861 Haardt.
4863 81. Fixed an obscure SMTP outgoing bug which required at least the following
4864 conditions: (a) there was another message waiting for the same server;
4865 (b) the server returned 5xx to all RCPT commands in the first message so
4866 that the message was not completed; (c) the server dropped the connection
4867 or gave a negative response to the RSET that Exim sends to abort the
4868 transaction. The observed case was a dropped connection after DATA that had
4869 been sent in pipelining mode. That is, the server had advertised PIPELINING
4870 but was not implementing it correctly. The effect of the bug was incorrect
4871 behaviour, such as trying another host, and this could lead to a crash.
4874 Exim version 4.30
4875 -----------------
4877 1. The 3rd arguments to getsockname(), getpeername(), and accept() in exim.c
4878 and daemon.c were passed as pointers to ints; they should have been
4879 pointers to socklen_t variables (which are typically unsigned ints).
4881 2. Some signed/unsigned type warnings in the os.c file for Linux have been
4882 fixed.
4884 3. Fixed a really odd bug that affected only the testing scheme; patching a
4885 certain fixed string in the binary changed the value of another string that
4886 happened to be identical to the end of the original first string.
4888 4. When gethostbyname() (or equivalent) is passed an IP address as a "host
4889 name", it returns that address as the IP address. On some operating
4890 systems (e.g. Solaris), it also passes back the IP address string as the
4891 "host name". However, on others (e.g. Linux), it passes back an empty
4892 string. Exim wasn't checking for this, and was changing the host name to an
4893 empty string, assuming it had been canonicized.
4895 5. Although rare, it is permitted to have more than one PTR record for a given
4896 IP address. I thought that gethostbyaddr() or getipnodebyaddr() always gave
4897 all the names associated with an address, because they do in Solaris.
4898 However, it seems that they do not in Linux for data that comes from the
4899 DNS. If an address in /etc/hosts has multiple names, they _are_ all given.
4900 I found this out when I moved to a new Linux workstation and tried to run
4901 the Exim test suite.
4903 To get round this problem I have changed the code so that it now does its
4904 own call to the DNS to look up PTR records when searching for a host name.
4905 If nothing can be found in the DNS, it tries gethostbyaddr(), so that
4906 addresses that are only in /etc/hosts are still found.
4908 This behaviour is, however, controlled by an option called host_lookup_
4909 order, which defaults to "bydns:byaddr". If people want to use the other
4910 order, or indeed, just use one or the other means of lookup, they can
4911 specify it in this variable.
4913 6. If a PTR record yields an empty name, Exim treats it as non-existent. In
4914 some operating systems, this comes back from gethostbyaddr() as an empty
4915 string, and this is what Exim used to test for. However, it seems that in
4916 other systems, "." is yielded. Exim now tests for this case too.
4918 7. The values of check_spool_space and check_log_space are now held internally
4919 as a number of kilobytes instead of an absolute number of bytes. If a
4920 numbers is specified without 'K' or 'M', it is rounded up to the nearest
4921 kilobyte. This means that much larger values can be stored.
4923 8. Exim monitor: an attempt to get the action menu when not actually pointing
4924 at a message produces an empty menu entitled "No message selected". This
4925 works on Solaris (OpenWindows). However, XFree86 does not like a menu with
4926 no entries in it ("Shell widget menu has zero width and/or height"). So I
4927 have added a single, blank menu entry in this case.
4929 9. Added ${quote_local_part.
4931 10. MIME decoding is now applied to the contents of Subject: header lines when
4932 they are logged.
4934 11. Now that a reference to $sender_host_address automatically causes a reverse
4935 lookup to occur if necessary (4.13/18), there is no need to arrange for a
4936 host lookup before query-style lookups in lists that might use this
4937 variable. This has therefore been abolished, and the "net-" prefix is no
4938 longer necessary for query-style lookups.
4940 12. The Makefile for SCO_SV contained a setting of LDFLAGS. This appears to
4941 have been a typo for LFLAGS, so it has been changed.
4943 13. The install script calls Exim with "-C /dev/null" in order to find the
4944 version number. If ALT_CONFIG_PREFIX was set, this caused an error message
4945 to be output. Howeve, since Exim outputs its version number before the
4946 error, it didn't break the script. It just looked ugly. I fixed this by
4947 always allowing "-C /dev/null" if the caller is root.
4949 14. Ignore overlarge ACL variable number when reading spool file - insurance
4950 against a later release with more variables having written the file.
4952 15. The standard form for an IPv6 address literal was being rejected by EHLO.
4953 Example: [IPv6:2002:c1ed:8229:10:202:2dff:fe07:a42a]. Exim now accepts
4954 this, as well as the form without the "IPv6" on the front.
4956 16. Added CHOWN_COMMAND=/usr/sbin/chown and LIBS=-lresolv to the
4957 OS/Makefile-Darwin file.
4959 17. Fixed typo in lookups/ldap.c: D_LOOKUP should be D_lookup. This applied
4960 only to LDAP libraries that do not have LDAP_OPT_DEREF.
4962 18. After change 4.21/52, "%ld" was used to format the contents of the $inode
4963 variable. However, some OS use ints for inodes. I've added cast to long int
4964 to get rid of the compiler warning.
4966 19. I had forgotten to lock out "/../" in configuration file names when
4967 ALT_CONFIG_PREFIX was set.
4969 20. Routers used for verification do not need to specify transports. However,
4970 if such a router generated a host list, and callout was configured, Exim
4971 crashed, because it could not find a port number from the (non-existent)
4972 transport. It now assumes port 25 in this circumstance.
4974 21. Added the -t option to exigrep.
4976 22. If LOOKUP_LSEARCH is defined, all three linear search methods (lsearch,
4977 wildlsearch, nwildlsearch) are compiled. LOOKUP_WILDLSEARCH and LOOKUP_
4978 NWILDLSEARCH are now obsolete, but retained for compatibility. If either of
4979 them is set, LOOKUP_LSEARCH is forced.
4981 23. "exim -bV" now outputs a list of lookups that are included in the binary.
4983 24. Added sender and host information to the "rejected by local_scan()" log
4984 line; previously there was no indication of these.
4986 25. Added .include_if_exists.
4988 26. Change 3.952/11 added an explicit directory sync on top of a file sync for
4989 Linux. It turns out that not all file systems support this. Apparently some
4990 versions of NFS do not. (It's rare to put Exim's spool on NFS, but people
4991 do it.) To cope with this, the error EINVAL, which means that sync-ing is
4992 not supported on the file descriptor, is now ignored when Exim is trying to
4993 sync a directory. This applies only to Linux.
4995 27. Added -DBIND_8_COMPAT to the CLFAGS setting for Darwin.
4997 28. In Darwin (MacOS X), the PAM headers are in /usr/include/pam and not in
4998 /usr/include/security. There's now a flag in OS/os.h-Darwin to cope with
4999 this.
5001 29. Added support for maildirsize files from supplied patch (modified a bit).
5003 30. The use of :fail: followed by an empty string could lead Exim to respond to
5004 sender verification failures with (e.g.):
5006 550 Verification failed for <xxx>
5007 550 Sender verify failed
5009 where the first response line was missing the '-' that indicates it is not