1 This document describes *changes* to previous versions, that might
2 affect Exim's operation, with an unchanged configuration file. For new
3 options, and new features, see the NewStuff file next to this ChangeLog.
9 JH/01 Bug 1329: Fix format of Maildir-format filenames to match other mail-
10 related applications. Previously an "H" was used where available info
11 says that "M" should be, so change to match.
13 JH/02 Bug 2587: Fix pam expansion condition. Tainted values are commonly used
14 as arguments, so an implementation trying to copy these into a local
15 buffer was taking a taint-enforcement trap. Fix by using dynamically
16 created buffers. Similar fix for radius expansion condition.
18 JH/03 Bug 2586: Fix listcount expansion operator. Using tainted arguments is
19 reasonable, eg. to count headers. Fix by using dynamically created
20 buffers rather than a local. Do similar fixes for ACL actions "dcc",
21 "log_reject_target", "malware" and "spam"; the arguments are expanded
22 so could be handling tainted values.
24 JH/04 Bug 2590: Fix -bi (newaliases). A previous code rearrangement had
25 broken the (no-op) support for this sendmail command. Restore it
26 to doing nothing, silently, and returning good status.
28 JH/05 Bug 2593: Fix "vacation" in Exim filter. Previously, when a "once"
29 record path was given (or the default used) without a leading directory
30 path, an error occurred on trying to open it. Use the transport's working
33 JH/06 Bug 2594: Change the name used for certificate name checks in the smtp
34 transport. Previously it was the name on the DNS A-record; use instead
35 the head of the CNAME chain leading there (if there is one). This seems
36 to align better with RFC 6125.
38 JH/07 Bug 2597: Fix a resource leak. Using a lookup in obtaining a value for
39 smtp_accept_max_per_host allocated resources which were not released
40 when the limit was exceeded. This eventually crashed the daemon. Fix
41 by adding a relase action in that path.
43 JH/08 Bug 2598: Fix verify ACL condition. The options for the condition are
44 expanded; previously using tainted values was rejected. Fix by using
45 dynamically-created buffers.
47 JH/09 Relax restrictions on ACL verify condition needing access to message
48 headers. Previously they were only permitted in data and non-smtp ACLs;
49 permit also mime, dkim, prdr quit and notquit. Applies to header-syntax,
50 not_blind, header_sender and header_names_ascii verification.
52 JH/10 Bug 2603: Fix coding of string copying to only evaluate arguments once.
53 Previously a macro used one argument twice; when called with the
54 argument as an expression having side-effects, incorrect operation
55 resulted. Use an inlineable function.
57 JH/11 Bug 2604: Fix request to cutthrough-deliver when a connection is already
58 held open for a verify callout. Previously this wan not accounted for
59 and a corrupt onward SMTP conversation resulted.
61 JH/12 Bug 2607: Fix the ${srs_encode } expansion to handle quoted local_parts.
62 Previously they were embedded naively in the constructed address; when
63 needed, strip the quoting and quote the entire local_part.
64 Also make the inbound_srs expansion condition handle quoting.
71 JH/01 Avoid costly startup code when not strictly needed. This reduces time
72 for some exim process initialisations. It does mean that the logging
73 of TLS configuration problems is only done for the daemon startup.
75 JH/02 Early-pipelining support code is now included unless disabled in Makefile.
77 JH/03 DKIM verification defaults no long accept sha1 hashes, to conform to
78 RFC 8301. They can still be enabled, using the dkim_verify_hashes main
81 JH/04 Support CHUNKING from an smtp transport using a transport_filter, when
82 DKIM signing is being done. Previously a transport_filter would always
83 disable CHUNKING, falling back to traditional DATA.
85 JH/05 Regard command-line receipients as tainted.
87 JH/06 Bug 340: Remove the daemon pid file on exit, whe due to SIGTERM.
89 JH/07 Bug 2489: Fix crash in the "pam" expansion condition. It seems that the
90 PAM library frees one of the arguments given to it, despite the
91 documentation. Therefore a plain malloc must be used.
93 JH/08 Bug 2491: Use tainted buffers for the transport smtp context. Previously
94 on-stack buffers were used, resulting in a taint trap when DSN information
95 copied from a received message was written into the buffer.
97 JH/09 Bug 2493: Harden ARC verify against Outlook, whick has been seen to mix
98 the ordering of its ARC headers. This caused a crash.
100 JH/10 Bug 2492: Use tainted memory for retry record when needed. Previously when
101 a new record was being constructed with information from the peer, a trap
104 JH/11 Bug 2494: Unset the default for dmarc_tld_file. Previously a naiive
105 installation would get error messages from DMARC verify, when it hit the
106 nonexistent file indicated by the default. Distros wanting DMARC enabled
107 should both provide the file and set the option.
108 Also enforce no DMARC verification for command-line sourced messages.
110 JH/12 Fix an uninitialised flag in early-pipelining. Previously connections
111 could, depending on the platform, hang at the STARTTLS response.
113 JH/13 Bug 2498: Reset a counter used for ARC verify before handling another
114 message on a connection. Previously if one message had ARC headers and
115 the following one did not, a crash could result when adding an
116 Authentication-Results: header.
118 JH/14 Bug 2500: Rewind some of the common-coding in string handling between the
119 Exim main code and Exim-related utities. The introduction of taint
120 tracking also did many adjustments to string handling. Since then, eximon
121 frequently terminated with an assert failure.
123 JH/15 When PIPELINING, synch after every hundred or so RCPT commands sent and
124 check for 452 responses. This slightly helps the inefficieny of doing
125 a large alias-expansion into a recipient-limited target. The max_rcpt
126 transport option still applies (and at the current default, will override
127 the new feature). The check is done for either cause of synch, and forces
128 a fast-retry of all 452'd recipients using a new MAIL FROM on the same
129 connection. The new facility is not tunable at this time.
131 JH/16 Fix the variables set by the gsasl authenticator. Previously a pointer to
132 library live data was being used, so the results became garbage. Make
133 copies while it is still usable.
135 JH/17 Logging: when the deliver_time selector ise set, include the DT= field
136 on delivery deferred (==) and failed (**) lines (if a delivery was
137 attemtped). Previously it was only on completion (=>) lines.
139 JH/18 Authentication: the gsasl driver not provides the $authN variables in time
140 for the expansion of the server_scram_iter and server_scram_salt options.
142 WB/01 SPF: DNS lookups for the obsolete SPF RR type done by the libspf2 library
143 are now specifically given a NO_DATA response without hitting the system
144 resolver. The library goes on to do the now-standard TXT lookup.
145 Use of dnsdb lookups is not affected.
147 JH/19 Bug 2507: Modules: on handling a dynamic-module (lookups) open failure,
148 only retrieve the errormessage once. Previously two calls to dlerror()
149 were used, and the second one (for mainlog/paniclog) retrieved null
152 JH/20 Taint checking: disallow use of tainted data for
153 - the appendfile transport file and directory options
154 - the pipe transport command
155 - the autoreply transport file, log and once options
156 - file names used by the redirect router (including filter files)
158 - paths used by single-key lookups
159 Previously this was permitted.
161 JH/21 Bug 2501: Fix init call in the heimdal authenticator. Previously it
162 adjusted the size of a major service buffer; this failed because the
163 buffer was in use at the time. Change to a compile-time increase in the
164 buffer size, when this authenticator is compiled into exim.
166 JH/22 Taint-checking: move to safe-mode taint checking on all platforms. The
167 previous fast-mode was untenable in the face of glibs using mmap to
168 support larger malloc requests.
170 PP/01 Update the openssl_options possible values through OpenSSL 1.1.1c.
171 New values supported, if defined on system where compiled:
172 allow_no_dhe_kex, cryptopro_tlsext_bug, enable_middlebox_compat,
173 no_anti_replay, no_encrypt_then_mac, prioritize_chacha, tlsext_padding
175 JH/23 Performance improvement in the initial phase of a two-pass queue run. By
176 running a limited number of proceses in parallel, a benefit is gained. The
177 amount varies with the platform hardware and load. The use of the option
178 queue_run_in_order means we cannot do this, as ordering becomes
181 JH/24 Bug 2524: fix the cyrus_sasl auth driver gssapi usage. A previous fix
182 had introduced a string-copy (for ensuring NUL-termination) which was not
183 appropriate for that case, which can include embedded NUL bytes in the
184 block of data. Investigation showed the copy to actually be needless, the
185 data being length-specified.
187 JH/25 Fix use of concurrent TLS connections under GnuTLS. When a callout was
188 done during a receiving connection, and both used TLS, global info was
189 used rather than per-connection info for tracking the state of data
190 queued for transmission. This could result in a connection hang.
192 JH/26 Fix use of the SIZE parameter on MAIL commands, on continued connections.
193 Previously, when delivering serveral messages down a single connection
194 only the first would provide a SIZE. This was due to the size information
195 not being properly tracked.
197 JH/27 Bug 2530: When operating in a timezone with sub-minute offset, such as
198 TAI (at 37 seconds currently), pretend to be in UTC for time-related
199 expansion and logging. Previously, spurious values such as a future
200 minute could be seen.
202 JH/28 Bug 2533: Fix expansion of ${tr } item. When called in some situations
203 it could crash from a null-deref. This could also affect the
204 ${addresses: } operator and ${readsock } item.
206 JH/29 Bug 2537: Fix $mime_part_count. When a single connection had a non-mime
207 message following a mime one, the variable was not reset.
209 JH/30 When an pipelined-connect fails at the first response, assume incorrect
210 cached capability (perhaps the peer reneged?) and immediately retry in
213 JH/31 Fix spurious detection of timeout while writing to transport filter.
215 JH/32 Bug 2541: Fix segfault on bad cmdline -f (sender) argument. Previously
216 an attempt to copy the string was made before checking it.
218 JH/33 Fix the dsearch lookup to return an untainted result. Previously the
219 taint of the lookup key was maintained; we now regard the presence in the
220 filesystem as sufficient validation.
222 JH/34 Fix the readsocket expansion to not segfault when an empty "options"
223 argument is supplied.
225 JH/35 The dsearch lookup now requires that the directory is an absolute path.
226 Previously this was not checked, and nonempty relative paths made an
227 access under Exim's current working directory.
229 JH/36 Bug 2554: Fix msg:defer event for the hosts_max_try_hardlimit case.
230 Previously no event was raised.
232 JH/37 Bug 2552: Fix the check on spool space during reception to use the SIZE
233 parameter supplied by the sender MAIL FROM command. Previously it was
234 ignored, and only the check_spool_space option value for the required
237 JH/38 Fix $dkim_key_length. This should, after a DKIM verification, present
238 the size of the signing public-key. Previously it was instead giving
239 the size of the signature hash.
241 JH/39 DKIM verification: the RFC 8301 restriction on sizes of RSA keys is now
242 the default. See the (new) dkim_verify_min_keysizes option.
244 JH/40 Fix a memory-handling bug: when a connection carried multiple messages
245 and an ACL use a lookup for checking either the local_part or domain,
246 stale data could be accessed. Ensure that variable references are
247 dropped between messages.
249 JH/41 Bug 2571: Fix SPA authenticator. Running as a server, an offset supplied
250 by the client was not checked as pointing within response data before
251 being used. A malicious client could thus cause an out-of-bounds read and
252 possibly gain authentication. Fix by adding the check.
254 JH/42 Internationalisation: change the default for downconversion in the smtp
255 transport to be "if needed". Previously it was "as previously set" for
256 the message, which usually meant "if needed" for message-submission but
257 "no" for everything else. However, MTAs have been seen using SMTPUTF8
258 even when the envelope addresses did not need it, resulting in forwarding
259 failures to non-supporting MTAs. A downconvert in such cases will be
260 a no-op on the addresses, merely dropping the use of SMTPUTF8 by the
261 transport. The change does mean that addresses needing conversion will
262 be converted when previously a delivery failure would occur.
264 JH/43 Fix possible long line in DSN. Previously when a very long SMTP error
265 response was received it would be used unchecked in a fail-DSN, violating
266 standards on line-length limits. Truncate if needed.
268 HS/01 Remove parameters of the link to www.open-spf.org. The linked form
269 doesn't work. (Additionally add a new main config option to configure the
276 JH/01 OpenSSL: With debug enabled output keying information sufficient, server
277 side, to decode a TLS 1.3 packet capture.
279 JH/02 OpenSSL: Suppress the sending of (stateful) TLS1.3 session tickets.
280 Previously the default library behaviour applied, sending two, each in
283 JH/03 Debug output for ACL now gives the config file name and line number for
286 JH/04 The default received_header_text now uses the RFC 8314 tls cipher clause.
288 JH/05 DKIM: ensure that dkim_domain elements are lowercased before use.
290 JH/06 Fix buggy handling of autoreply bounce_return_size_limit, and a possible
291 buffer overrun for (non-chunking) other transports.
293 JH/07 GnuTLS: Our use of late (post-handshake) certificate verification, under
294 TLS1.3, means that a server rejecting a client certificate is not visible
295 to the client until the first read of encrypted data (typically the
296 response to EHLO). Add detection for that case and treat it as a failed
297 TLS connection attempt, so that the normal retry-in-clear can work (if
298 suitably configured).
300 JB/01 Bug 2375: fix expansions of 822 addresses having comments in local-part
301 and/or domain. Found and fixed by Jason Betts.
303 JH/08 Add hardening against SRV & TLSA lookups the hit CNAMEs (a nonvalid
304 configuration). If a CNAME target was not a wellformed name pattern, a
307 JH/09 Logging: Fix initial listening-on line for multiple ports for an IP when
308 the OS reports them interleaved with other addresses.
310 JH/10 OpenSSL: Fix aggregation of messages. Previously, when PIPELINING was
311 used both for input and for a verify callout, both encrypted, SMTP
312 responses being sent by the server could be lost. This resulted in
313 dropped connections and sometimes bounces generated by a peer sending
316 JH/11 Harden plaintext authenticator against a badly misconfigured client-send
317 string. Previously it was possible to cause undefined behaviour in a
318 library routine (usually a crash). Found by "zerons".
320 JH/12 Bug 2384: fix "-bP smtp_receive_timeout". Previously it returned no
323 JH/13 Bug 2386: Fix builds with Dane under LibreSSL 2.9.0 onward. Some old
324 API was removed, so update to use the newer ones.
326 JH/14 Bug 1891: Close the log file if receiving a non-smtp message, without
327 any timeout set, is taking a long time. Previously we would hang on to a
328 rotated logfile "forever" if the input was arriving with long gaps
329 (a previous attempt to fix addressed lack, for a long time, of initial
332 HS/01 Bug 2390: Use message_id for tempfile creation to avoid races in a
333 shared (NFS) environment. The length of the tempfile name is now
334 4 + 16 ("hdr.$message_exim_id") which might break on file
335 systems which restrict the file name length to lower values.
338 HS/02 Bug 2390: Use message_id for tempfile creation to avoid races in a
339 shared (NFS) environment.
341 HS/03 Bug 2392: exigrep does case sensitive *option* processing (as it
342 did for all versions <4.90). Notably -M, -m, --invert, -I may be
345 JH/15 Use unsigned when creating bitmasks in macros, to avoid build errors
346 on some platforms for bit 31.
348 JH/16 GnuTLS: rework ciphersuite strings under recent library versions. Thanks
349 to changes apparently associated with TLS1.3 handling some of the APIs
350 previously used were either nonfunctional or inappropriate. Strings
351 like TLS1.3:ECDHE_SECP256R1__RSA_PSS_RSAE_SHA256__AES_256_GCM__AEAD:256
352 and TLS1.2:ECDHE_SECP256R1__RSA_SHA256__AES_128_CBC__SHA256:128 replace
353 the previous TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256 .
354 This affects log line X= elements, the $tls_{in,out}_cipher variables,
355 and the use of specific cipher names in the encrypted= ACL condition.
357 JH/17 OpenSSL: the default openssl_options now disables ssl_v3.
359 JH/18 GnuTLS: fix $tls_out_ocsp under hosts_request_ocsp. Previously the
360 verification result was not updated unless hosts_require_ocsp applied.
362 JH/19 Bug 2398: fix listing of a named-queue. Previously, even with the option
363 queue_list_requires_admin set to false, non-admin users were denied the
366 JH/20 Bug 2389: fix server advertising of usable certificates, under GnuTLS in
367 directory-of-certs mode. Previously they were advertised despite the
370 JH/21 The smtp transport option "hosts_noproxy_tls" is now unset by default.
371 A single TCP connection by a client will now hold a TLS connection open
372 for multiple message deliveries, by default. Previously the default was to
375 JH/22 The smtp transport option "hosts_try_dane" now enables all hosts by
376 default. If built with the facility, DANE will be used. The facility
377 SUPPORT_DANE is now enabled in the prototype build Makefile "EDITME".
379 JH/23 The build default is now for TLS to be included; the SUPPORT_TLS define
380 is replaced with DISABLE_TLS. Either USE_GNUTLS or (the new) USE_OPENSSL
381 must be defined and you must still, unless you define DISABLE_TLS, manage
382 the the include-dir and library-file requirements that go with that
383 choice. Non-TLS builds are still supported.
385 JH/24 Fix duplicated logging of peer name/address, on a transport connection-
388 JH/25 The smtp transport option "hosts_try_fastopen" now enables all hosts by
389 default. If the platform supports and has the facility enabled, it will
390 be requested on all coneections.
392 JH/26 The PIPE_CONNECT facility is promoted from experimental status and is now
393 controlled by the build-time option SUPPORT_PIPE_CONNECT.
395 PP/01 Unbreak heimdal_gssapi, broken in 4.92.
397 JH/27 Bug 2404: Use the main-section configuration option "dsn_from" for
398 success-DSN messages. Previously the From: header was always the default
399 one for these; the option was ignored.
401 JH/28 Fix the timeout on smtp response to apply to the whole response.
402 Previously it was reset for every read, so a teergrubing peer sending
403 single bytes within the time limit could extend the connection for a
404 long time. Credit to Qualsys Security Advisory Team for the discovery.
406 JH/29 Fix DSN Final-Recipient: field. Previously it was the post-routing
407 delivery address, which leaked information of the results of local
408 forwarding. Change to the original envelope recipient address, per
411 JH/30 Bug 2411: Fix DSN generation when RFC 3461 failure notification is
412 requested. Previously not bounce was generated and a log entry of
413 error ignored was made.
415 JH/31 Avoid re-expansion in ${sort } expansion. (CVE-2019-13917)
417 JH/32 Introduce a general tainting mechanism for values read from the input
418 channel, and values derived from them. Refuse to expand any tainted
419 values, to catch one form of exploit.
421 JH/33 Bug 2413: Fix dkim_strict option. Previously the expansion result
422 was unused and the unexpanded text used for the test. Found and
423 fixed by Ruben Jenster.
425 JH/34 Fix crash after TLS shutdown. When the TCP/SMTP channel was left open,
426 an attempt to use a TLS library read routine dereffed a nul pointer,
429 JH/35 Bug 2409: filter out-of-spec chars from callout response before using
430 them in our smtp response.
432 JH/36 Have the general router option retry_use_local_part default to true when
433 any of the restrictive preconditions are set (to anything). Previously it
434 was only for check_local user. The change removes one item of manual
435 configuration which is required for proper retries when a remote router
436 handles a subset of addresses for a domain.
438 JH/37 Appendfile: when evaluating quota use (non-quota_size_regex) take the file
439 link count into consideration.
441 HS/04 Fix handling of very log lines in -H files. If a -<key> <value> line
442 caused the extension of big_buffer, the following lines were ignored.
444 JH/38 Bug 1395: Teach the DNS negative-cache about TTL value from the SOA in
445 accordance with RFC 2308. Previously there was no expiry, so a longlived
446 receive process (eg. due to ACL delays) versus a short SOA value could
449 HS/05 Handle trailing backslash gracefully. (CVE-2019-15846)
451 JH/39 Promote DMARC support to mainline.
453 JH/40 Bug 2452: Add a References: header to DSNs.
455 JH/41 With GnuTLS 3.6.0 (and later) do not attempt to manage Diffie-Hellman
456 parameters. The relevant library call is documented as "Deprecated: This
457 function is unnecessary and discouraged on GnuTLS 3.6.0 or later. Since
458 3.6.0, DH parameters are negotiated following RFC7919."
460 HS/06 Change the default of dnssec_request_domains to "*"
462 JH/42 Bug 2545: Fix CHUNKING for all RCPT commands rejected. Previously we
463 carried on and emitted a BDAT command, even when PIPELINING was not
466 JH/43 Bug 2465: Fix taint-handling in dsearch lookup. Previously a nontainted
467 buffer was used for the filename, resulting in a trap when tainted
468 arguments (eg. $domain) were used.
470 JH/44 With OpenSSL 1.1.1 (onwards) disable renegotiation for TLS1.2 and below;
471 recommended to avoid a possible server-load attack. The feature can be
472 re-enabled via the openssl_options main cofiguration option.
474 JH/45 local_scan API: documented the current smtp_printf() call. This changed
475 for version 4.90 - adding a "more data" boolean to the arguments.
476 Bumped the ABI version number also, this having been missed previously;
477 release versions 4.90 to 4.92.3 inclusive were effectively broken in
478 respect of usage of smtp_printf() by either local_scan code or libraries
479 accessed via the ${dlfunc } expansion item. Both will need coding
480 adjustment for any calls to smtp_printf() to match the new function
481 signature; a FALSE value for the new argument is always safe.
483 JH/46 FreeBSD: fix use of the sendfile() syscall. The shim was not updating
484 the file-offset (which the Linux syscall does, and exim expects); this
485 resulted in an indefinite loop.
487 JH/47 ARC: fix crash in signing, triggered when a configuration error failed
488 to do ARC verification. The Authentication-Results: header line added
489 by the configuration then had no ARC item.
495 JH/01 Remove code calling the customisable local_scan function, unless a new
496 definition "HAVE_LOCAL_SCAN=yes" is present in the Local/Makefile.
498 JH/02 Bug 1007: Avoid doing logging from signal-handlers, as that can result in
499 non-signal-safe functions being used.
501 JH/03 Bug 2269: When presented with a received message having a stupidly large
502 number of DKIM-Signature headers, disable DKIM verification to avoid
503 a resource-consumption attack. The limit is set at twenty.
505 JH/04 Add variables $arc_domains, $arc_oldest_pass for ARC verify. Fix the
506 report of oldest_pass in ${authres } in consequence, and separate out
507 some descriptions of reasons for verification fail.
509 JH/05 Bug 2273: Cutthrough delivery left a window where the received messsage
510 files in the spool were present and unlocked. A queue-runner could spot
511 them, resulting in a duplicate delivery. Fix that by doing the unlock
512 after the unlink. Investigation by Tim Stewart. Take the opportunity to
513 add more error-checking on spoolfile handling while that code is being
516 PP/01 Refuse to open a spool data file (*-D) if it's a symlink.
517 No known attacks, no CVE, this is defensive hardening.
519 JH/06 Bug 2275: The MIME ACL unlocked the received message files early, and
520 a queue-runner could start a delivery while other operations were ongoing.
521 Cutthrough delivery was a common victim, resulting in duplicate delivery.
522 Found and investigated by Tim Stewart. Fix by using the open message data
523 file handle rather than opening another, and not locally closing it (which
524 releases a lock) for that case, while creating the temporary .eml format
525 file for the MIME ACL. Also applies to "regex" and "spam" ACL conditions.
527 JH/07 Bug 177: Make a random-recipient callout success visible in ACL, by setting
528 $sender_verify_failure/$recipient_verify_failure to "random".
530 JH/08 When generating a selfsigned cert, use serial number 1 since zero is not
533 JH/09 Bug 2274: Fix logging of cmdline args when starting in an unlinked cwd.
534 Previously this would segfault.
536 JH/10 Fix ARC signing for case when DKIM signing failed. Previously this would
539 JH/11 Bug 2264: Exim now only follows CNAME chains one step by default. We'd
540 like zero, since the resolver should be doing this for us, But we need one
541 as a CNAME but no MX presence gets the CNAME returned; we need to check
542 that doesn't point to an MX to declare it "no MX returned" rather than
543 "error, loop". A new main option is added so the older capability of
544 following some limited number of chain links is maintained.
546 JH/12 Add client-ip info to non-pass iprev ${authres } lines.
548 JH/13 For receent Openssl versions (1.1 onward) use modern generic protocol
549 methods. These should support TLS 1.3; they arrived with TLS 1.3 and the
550 now-deprecated earlier definitions used only specified the range up to TLS
551 1.2 (in the older-version library docs).
553 JH/14 Bug 2284: Fix DKIM signing for body lines starting with a pair of dots.
555 JH/15 Rework TLS client-side context management. Stop using a global, and
556 explicitly pass a context around. This enables future use of TLS for
557 connections to service-daemons (eg. malware scanning) while a client smtp
558 connection is using TLS; with cutthrough connections this is quite likely.
560 JH/16 Fix ARC verification to do AS checks in reverse order.
562 JH/17 Support a "tls" option on the ${readsocket } expansion item.
564 JH/18 Bug 2287: Fix the protocol name (eg utf8esmtp) for multiple messages
565 using the SMTPUTF8 option on their MAIL FROM commands, in one connection.
566 Previously the "utf8" would be re-prepended for every additional message.
568 JH/19 Reject MAIL FROM commands with SMTPUTF8 when the facility was not advertised.
569 Previously thery were accepted, resulting in issues when attempting to
570 forward messages to a non-supporting MTA.
572 PP/02 Let -n work with printing macros too, not just options.
574 JH/20 Bug 2296: Fix cutthrough for >1 address redirection. Previously only
575 one parent address was copied, and bogus data was used at delivery-logging
576 time. Either a crash (after delivery) or bogus log data could result.
577 Discovery and analysis by Tim Stewart.
579 PP/03 Make ${utf8clean:} expansion operator detect incomplete final character.
580 Previously if the string ended mid-character, we did not insert the
581 promised '?' replacement.
583 PP/04 Documentation: current string operators work on bytes, not codepoints.
585 JH/21 Change as many as possible of the global flags into one-bit bitfields; these
586 should pack well giving a smaller memory footprint so better caching and
587 therefore performance. Group the declarations where this can't be done so
588 that the byte-sized flag variables are not interspersed among pointer
589 variables, giving a better chance of good packing by the compiler.
591 JH/22 Bug 1896: Fix the envelope from for DMARC forensic reports to be possibly
592 non-null, to avoid issues with sites running BATV. Previously reports were
593 sent with an empty envelope sender so looked like bounces.
595 JH/23 Bug 2318: Fix the noerror command within filters. It wasn't working.
596 The ignore_error flag wasn't being returned from the filter subprocess so
597 was not set for later routers. Investigation and fix by Matthias Kurz.
599 JH/24 Bug 2310: Raise a msg:fail:internal event for each undelivered recipient,
600 and a msg:complete for the whole, when a message is manually removed using
601 -Mrm. Developement by Matthias Kurz, hacked on by JH.
603 JH/25 Avoid fixed-size buffers for pathnames in DB access. This required using
604 a "Gnu special" function, asprintf() in the DB utility binary builds; I
605 hope that is portable enough.
607 JH/26 Bug 2311: Fix DANE-TA verification under GnuTLS. Previously it was also
608 requiring a known-CA anchor certificate; make it now rely entirely on the
609 TLSA as an anchor. Checking the name on the leaf cert against the name
610 on the A-record for the host is still done for TA (but not for EE mode).
612 JH/27 Fix logging of proxy address. Previously, a pointless "PRX=[]:0" would be
613 included in delivery lines for non-proxied connections, when compiled with
614 SUPPORT_SOCKS and running with proxy logging enabled.
616 JH/28 Bug 2314: Fire msg:fail:delivery event even when error is being ignored.
617 Developement by Matthias Kurz, tweaked by JH. While in that bit of code,
618 move the existing event to fire before the normal logging of message
619 failure so that custom logging is bracketed by normal logging.
621 JH/29 Bug 2322: A "fail" command in a non-system filter (file) now fires the
622 msg:fail:internal event. Developement by Matthias Kurz.
624 JH/30 Bug 2329: Increase buffer size used for dns lookup from 2k, which was
625 far too small for todays use of crypto signatures stored there. Go all
626 the way to the max DNS message size of 64kB, even though this might be
627 overmuch for IOT constrained device use.
629 JH/31 Fix a bad use of a copy function, which could be used to pointlessly
630 copy a string over itself. The library routine is documented as not
631 supporting overlapping copies, and on MacOS it actually raised a SIGABRT.
633 JH/32 For main options check_spool_space and check_inode_space, where the
634 platform supports 64b integers, support more than the previous 2^31 kB
635 (i.e. more than 2 TB). Accept E, P and T multipliers in addition to
636 the previous G, M, k.
638 JH/33 Bug 2338: Fix the cyrus-sasl authenticator to fill in the
639 $authenticated_fail_id variable on authentication failure. Previously
642 JH/34 Increase RSA keysize of autogen selfsign cert from 1024 to 2048. RHEL 8.0
643 OpenSSL didn't want to use such a weak key. Do for GnuTLS also, and for
644 more-modern GnuTLS move from GNUTLS_SEC_PARAM_LOW to
645 GNUTLS_SEC_PARAM_MEDIUM.
647 JH/35 OpenSSL: fail the handshake when SNI processing hits a problem, server
648 side. Previously we would continue as if no SNI had been received.
650 JH/36 Harden the handling of string-lists. When a list consisted of a sole
651 "<" character, which should be a list-separator specification, we walked
652 off past the nul-terimation.
654 JH/37 Bug 2341: Send "message delayed" warning MDNs (restricted to external
655 causes) even when the retry time is not yet met. Previously they were
656 not, meaning that when (say) an account was over-quota and temp-rejecting,
657 and multiple senders' messages were queued, only one sender would get
658 notified on each configured delay_warning cycle.
660 JH/38 Bug 2351: Log failures to extract envelope addresses from message headers.
662 JH/39 OpenSSL: clear the error stack after an SSL_accept(). With anon-auth
663 cipher-suites, an error can be left on the stack even for a succeeding
664 accept; this results in impossible error messages when a later operation
667 AM/01 Bug 2359: GnuTLS: repeat lowlevel read and write operations while they
668 return error codes indicating retry. Under TLS1.3 this becomes required.
670 JH/40 Fix the feature-cache refresh for EXPERIMENTAL_PIPE_CONNECT. Previously
671 it only wrote the new authenticators, resulting in a lack of tracking of
672 peer changes of ESMTP extensions until the next cache flush.
674 JH/41 Fix the loop reading a message header line to check for integer overflow,
675 and more-often against header_maxsize. Previously a crafted message could
676 induce a crash of the recive process; now the message is cleanly rejected.
678 JH/42 Bug 2366: Fix the behaviour of the dkim_verify_signers option. It had
679 been totally disabled for all of 4.91. Discovery and fix by "Mad Alex".
685 GF/01 DEFER rather than ERROR on redis cluster MOVED response.
686 When redis_servers is set to a list of > 1 element, and the Redis servers
687 in that list are in cluster configuration, convert the REDIS_REPLY_ERROR
688 case of MOVED into a DEFER case instead, thus moving the query onto the
689 next server in the list. For a cluster of N elements, all N servers must
690 be defined in redis_servers.
692 GF/02 Catch and remove uninitialized value warning in exiqsumm
693 Check for existence of @ARGV before looking at $ARGV[0]
695 JH/01 Replace the store_release() internal interface with store_newblock(),
696 which internalises the check required to safely use the old one, plus
697 the allocate and data copy operations duplicated in both (!) of the
698 extant use locations.
700 JH/02 Disallow '/' characters in queue names specified for the "queue=" ACL
701 modifier. This matches the restriction on the commandline.
703 JH/03 Fix pgsql lookup for multiple result-tuples with a single column.
704 Previously only the last row was returned.
706 JH/04 Bug 2217: Tighten up the parsing of DKIM signature headers. Previously
707 we assumed that tags in the header were well-formed, and parsed the
708 element content after inspecting only the first char of the tag.
709 Assumptions at that stage could crash the receive process on malformed
712 JH/05 Bug 2215: Fix crash associated with dnsdb lookup done from DKIM ACL.
713 While running the DKIM ACL we operate on the Permanent memory pool so that
714 variables created with "set" persist to the DATA ACL. Also (at any time)
715 DNS lookups that fail create cache records using the Permanent pool. But
716 expansions release any allocations made on the current pool - so a dnsdb
717 lookup expansion done in the DKIM ACL releases the memory used for the
718 DNS negative-cache, and bad things result. Solution is to switch to the
719 Main pool for expansions.
720 While we're in that code, add checks on the DNS cache during store_reset,
721 active in the testsuite.
722 Problem spotted, and debugging aided, by Wolfgang Breyha.
724 JH/06 Fix issue with continued-connections when the DNS shifts unreliably.
725 When none of the hosts presented to a transport match an already-open
726 connection, close it and proceed with the list. Previously we would
727 queue the message. Spotted by Lena with Yahoo, probably involving
730 JH/07 Bug 2214: Fix SMTP responses resulting from non-accept result of MIME ACL.
731 Previously a spurious "250 OK id=" response was appended to the proper
734 JH/08 The "support for" informational output now, which built with Content
735 Scanning support, has a line for the malware scanner interfaces compiled
736 in. Interface can be individually included or not at build time.
738 JH/09 The "aveserver", "kavdaemon" and "mksd" interfaces are now not included
739 by the template makefile "src/EDITME". The "STREAM" support for an older
740 ClamAV interface method is removed.
742 JH/10 Bug 2223: Fix mysql lookup returns for the no-data case (when the number of
743 rows affected is given instead).
745 JH/11 The runtime Berkeley DB library version is now additionally output by
746 "exim -d -bV". Previously only the compile-time version was shown.
748 JH/12 Bug 2230: Fix cutthrough routing for nonfirst messages in an initiating
749 SMTP connection. Previously, when one had more receipients than the
750 first, an abortive onward connection was made. Move to full support for
751 multiple onward connections in sequence, handling cutthrough connection
752 for all multi-message initiating connections.
754 JH/13 Bug 2229: Fix cutthrough routing for nonstandard port numbers defined by
755 routers. Previously, a multi-recipient message would fail to match the
756 onward-connection opened for the first recipient, and cause its closure.
758 JH/14 Bug 2174: A timeout on connect for a callout was also erroneously seen as
759 a timeout on read on a GnuTLS initiating connection, resulting in the
760 initiating connection being dropped. This mattered most when the callout
761 was marked defer_ok. Fix to keep the two timeout-detection methods
764 JH/15 Relax results from ACL control request to enable cutthrough, in
765 unsupported situations, from error to silently (except under debug)
766 ignoring. This covers use with PRDR, frozen messages, queue-only and
769 HS/01 Fix Buffer overflow in base64d() (CVE-2018-6789)
771 JH/16 Fix bug in DKIM verify: a buffer overflow could corrupt the malloc
772 metadata, resulting in a crash in free().
774 PP/01 Fix broken Heimdal GSSAPI authenticator integration.
775 Broken in f2ed27cf5, missing an equals sign for specified-initialisers.
776 Broken also in d185889f4, with init system revamp.
778 JH/17 Bug 2113: Fix conversation closedown with the Avast malware scanner.
779 Previously we abruptly closed the connection after reading a malware-
780 found indication; now we go on to read the "scan ok" response line,
783 JH/18 Bug 2239: Enforce non-usability of control=utf8_downconvert in the mail
784 ACL. Previously, a crash would result.
786 JH/19 Speed up macro lookups during configuration file read, by skipping non-
787 macro text after a replacement (previously it was only once per line) and
788 by skipping builtin macros when searching for an uppercase lead character.
790 JH/20 DANE support moved from Experimental to mainline. The Makefile control
791 for the build is renamed.
793 JH/21 Fix memory leak during multi-message connections using STARTTLS. A buffer
794 was allocated for every new TLS startup, meaning one per message. Fix
795 by only allocating once (OpenSSL) or freeing on TLS-close (GnuTLS).
797 JH/22 Bug 2236: When a DKIM verification result is overridden by ACL, DMARC
798 reported the original. Fix to report (as far as possible) the ACL
799 result replacing the original.
801 JH/23 Fix memory leak during multi-message connections using STARTTLS under
802 OpenSSL. Certificate information is loaded for every new TLS startup,
803 and the resources needed to be freed.
805 JH/24 Bug 2242: Fix exim_dbmbuild to permit directoryless filenames.
807 JH/25 Fix utf8_downconvert propagation through a redirect router. Previously it
810 JH/26 Bug 2253: For logging delivery lines under PRDR, append the overall
811 DATA response info to the (existing) per-recipient response info for
812 the "C=" log element. It can have useful tracking info from the
813 destination system. Patch from Simon Arlott.
815 JH/27 Bug 2251: Fix ldap lookups that return a single attribute having zero-
816 length value. Previously this would segfault.
818 HS/02 Support Avast multiline protoocol, this allows passing flags to
819 newer versions of the scanner.
821 JH/28 Ensure that variables possibly set during message acceptance are marked
822 dead before release of memory in the daemon loop. This stops complaints
823 about them when the debug_store option is enabled. Discovered specifically
824 for sender_rate_period, but applies to a whole set of variables.
825 Do the same for the queue-runner and queue-list loops, for variables set
826 from spool message files. Do the same for the SMTP per-message loop, for
827 certain variables indirectly set in ACL operations.
829 JH/29 Bug 2250: Fix a longstanding bug in heavily-pipelined SMTP input (such
830 as a multi-recipient message from a mailinglist manager). The coding had
831 an arbitrary cutoff number of characters while checking for more input;
832 enforced by writing a NUL into the buffer. This corrupted long / fast
833 input. The problem was exposed more widely when more pipelineing of SMTP
834 responses was introduced, and one Exim system was feeding another.
835 The symptom is log complaints of SMTP syntax error (NUL chars) on the
836 receiving system, and refused recipients seen by the sending system
837 (propating to people being dropped from mailing lists).
838 Discovered and pinpointed by David Carter.
840 JH/30 The (EXPERIMENTAL_DMARC) variable $dmarc_ar_header is withdrawn, being
841 replaced by the ${authresults } expansion.
843 JH/31 Bug 2257: Fix pipe transport to not use a socket-only syscall.
845 HS/03 Set a handler for SIGTERM and call exit(3) if running as PID 1. This
846 allows proper process termination in container environments.
848 JH/32 Bug 2258: Fix spool_wireformat in combination with LMTP transport.
849 Previously the "final dot" had a newline after it; ensure it is CR,LF.
851 JH/33 SPF: remove support for the "spf" ACL condition outcome values "err_temp"
852 and "err_perm", deprecated since 4.83 when the RFC-defined words
853 "temperror" and "permerror" were introduced.
855 JH/34 Re-introduce enforcement of no cutthrough delivery on transports having
856 transport-filters or DKIM-signing. The restriction was lost in the
857 consolidation of verify-callout and delivery SMTP handling.
858 Extend the restriction to also cover ARC-signing.
860 JH/35 Cutthrough: for a final-dot response timeout (and nonunderstood responses)
861 in defer=pass mode supply a 450 to the initiator. Previously the message
864 PP/02 DANE: add dane_require_tls_ciphers SMTP Transport option; if unset,
865 tls_require_ciphers is used as before.
867 HS/03 Malware Avast: Better match the Avast multiline protocol. Add
868 "pass_unscanned". Only tmpfails from the scanner are written to
869 the paniclog, as they may require admin intervention (permission
870 denied, license issues). Other scanner errors (like decompression
871 bombs) do not cause a paniclog entry.
873 JH/36 Fix reinitialisation of DKIM logging variable between messages.
874 Previously it was possible to log spurious information in receive log
877 JH/37 Bug 2255: Revert the disable of the OpenSSL session caching. This
878 triggered odd behaviour from Outlook Express clients.
880 PP/03 Add util/renew-opendmarc-tlds.sh script for safe renewal of public
883 JH/38 DKIM: accept Ed25519 pubkeys in SubjectPublicKeyInfo-wrapped form,
884 since the IETF WG has not yet settled on that versus the original
885 "bare" representation.
887 JH/39 Fix syslog logging for syslog_timestamp=no and log_selector +millisec.
888 Previously the millisecond value corrupted the output.
889 Fix also for syslog_pid=no and log_selector +pid, for which the pid
890 corrupted the output.
896 JH/01 Rework error string handling in TLS interface so that the caller in
897 more cases is responsible for logging. This permits library-sourced
898 string to be attached to addresses during delivery, and collapses
899 pairs of long lines into single ones.
901 PP/01 Allow PKG_CONFIG_PATH to be set in Local/Makefile and use it correctly
902 during configuration. Wildcards are allowed and expanded.
904 JH/02 Rework error string handling in DKIM to pass more info back to callers.
905 This permits better logging.
907 JH/03 Rework the transport continued-connection mechanism: when TLS is active,
908 do not close it down and have the child transport start it up again on
909 the passed-on TCP connection. Instead, proxy the child (and any
910 subsequent ones) for TLS via a unix-domain socket channel. Logging is
911 affected: the continued delivery log lines do not have any DNSSEC, TLS
912 Certificate or OCSP information. TLS cipher information is still logged.
914 JH/04 Shorten the log line for daemon startup by collapsing adjacent sets of
915 identical IP addresses on different listening ports. Will also affect
918 PP/02 Bug 2070: uClibc defines __GLIBC__ without providing glibc headers;
919 add noisy ifdef guards to special-case this sillyness.
920 Patch from Bernd Kuhls.
922 JH/05 Tighten up the checking in isip4 (et al): dotted-quad components larger
923 than 255 are no longer allowed.
925 JH/06 Default openssl_options to include +no_ticket, to reduce load on peers.
926 Disable the session-cache too, which might reduce our load. Since we
927 currrectly use a new context for every connection, both as server and
928 client, there is no benefit for these.
929 GnuTLS appears to not support tickets server-side by default (we don't
930 call gnutls_session_ticket_enable_server()) but client side is enabled
931 by default on recent versions (3.1.3 +) unless the PFS priority string
934 PP/03 Add $SOURCE_DATE_EPOCH support for reproducible builds, per spec at
935 <https://reproducible-builds.org/specs/source-date-epoch/>.
937 JH/07 Fix smtp transport use of limited max_rcpt under mua_wrapper. Previously
938 the check for any unsuccessful recipients did not notice the limit, and
939 erroneously found still-pending ones.
941 JH/08 Pipeline CHUNKING command and data together, on kernels that support
942 MSG_MORE. Only in-clear (not on TLS connections).
944 JH/09 Avoid using a temporary file during transport using dkim. Unless a
945 transport-filter is involved we can buffer the headers in memory for
946 creating the signature, and read the spool data file once for the
947 signature and again for transmission.
949 JH/10 Enable use of sendfile in Linux builds as default. It was disabled in
950 4.77 as the kernel support then wasn't solid, having issues in 64bit
951 mode. Now, it's been long enough. Add support for FreeBSD also.
953 JH/11 Bug 2104: Fix continued use of a transport connection with TLS. In the
954 case where the routing stage had gathered several addresses to send to
955 a host before calling the transport for the first, we previously failed
956 to close down TLS in the old transport process before passing the TCP
957 connection to the new process. The new one sent a STARTTLS command
958 which naturally failed, giving a failed delivery and bloating the retry
959 database. Investigation and fix prototype from Wolfgang Breyha.
961 JH/12 Fix check on SMTP command input synchronisation. Previously there were
962 false-negatives in the check that the sender had not preempted a response
963 or prompt from Exim (running as a server), due to that code's lack of
964 awareness of the SMTP input buffering.
966 PP/04 Add commandline_checks_require_admin option.
967 Exim drops privileges sanely, various checks such as -be aren't a
968 security problem, as long as you trust local users with access to their
969 own account. When invoked by services which pass untrusted data to
970 Exim, this might be an issue. Set this option in main configuration
971 AND make fixes to the calling application, such as using `--` to stop
974 JH/13 Do pipelining under TLS. Previously, although safe, no advantage was
975 taken. Now take care to pack both (client) MAIL,RCPT,DATA, and (server)
976 responses to those, into a single TLS record each way (this usually means
977 a single packet). As a side issue, smtp_enforce_sync now works on TLS
980 PP/05 OpenSSL/1.1: use DH_bits() for more accurate DH param sizes. This
981 affects you only if you're dancing at the edge of the param size limits.
982 If you are, and this message makes sense to you, then: raise the
983 configured limit or use OpenSSL 1.1. Nothing we can do for older
986 JH/14 For the "sock" variant of the malware scanner interface, accept an empty
987 cmdline element to get the documented default one. Previously it was
990 JH/15 Fix a crash in the smtp transport caused when two hosts in succession
991 are unsuable for non-message-specific reasons - eg. connection timeout,
992 banner-time rejection.
994 JH/16 Fix logging of delivery remote port, when specified by router, under
997 PP/06 Repair manualroute's ability to take options in any order, even if one
998 is the name of a transport.
1001 HS/01 Cleanup, prevent repeated use of -p/-oMr (CVE-2017-1000369)
1003 JH/17 Change the list-building routines interface to use the expanding-string
1004 triplet model, for better allocation and copying behaviour.
1006 JH/18 Prebuild the data-structure for "builtin" macros, for faster startup.
1007 Previously it was constructed the first time a possibly-matching string
1008 was met in the configuration file input during startup; now it is done
1011 JH/19 Bug 2141: Use the full-complex API for Berkeley DB rather than the legacy-
1012 compatible one, to avoid the (poorly documented) possibility of a config
1013 file in the working directory redirecting the DB files, possibly correpting
1014 some existing file. CVE-2017-10140 assigned for BDB.
1016 JH/20 Bug 2147: Do not defer for a verify-with-callout-and-random which is not
1017 cache-hot. Previously, although the result was properly cached, the
1018 initial verify call returned a defer.
1020 JH/21 Bug 2151: Avoid using SIZE on the MAIL for a callout verify, on any but
1021 the main verify for receipient in uncached-mode.
1023 JH/22 Retire historical build files to an "unsupported" subdir. These are
1024 defined as "ones for which we have no current evidence of testing".
1026 JH/23 DKIM: enforce the DNS pubkey record "h" permitted-hashes optional field,
1027 if present. Previously it was ignored.
1029 JH/24 Start using specified-initialisers in C structure init coding. This is
1030 a C99 feature (it's 2017, so now considered safe).
1032 JH/25 Use one-bit bitfields for flags in the "addr" data structure. Previously
1033 if was a fixed-sized field and bitmask ops via macros; it is now more
1036 PP/07 GitHub PR 56: Apply MariaDB build fix.
1037 Patch provided by Jaroslav Škarvada.
1039 PP/08 Bug 2161: Fix regression in sieve quoted-printable handling introduced
1040 during Coverity cleanups [4.87 JH/47]
1041 Diagnosis and fix provided by Michael Fischer v. Mollard.
1043 JH/26 Fix DKIM bug: when the pseudoheader generated for signing was exactly
1044 the right size to place the terminating semicolon on its own folded
1045 line, the header hash was calculated to an incorrect value thanks to
1046 the (relaxed) space the fold became.
1048 HS/02 Fix Bug 2130: large writes from the transport subprocess were chunked
1049 and confused the parent.
1051 JH/27 Fix SOCKS bug: an unitialized pointer was deref'd by the transport process
1052 which could crash as a result. This could lead to undeliverable messages.
1054 JH/28 Logging: "next input sent too soon" now shows where input was truncated
1057 JH/29 Fix queue_run_in_order to ignore the PID portion of the message ID. This
1058 matters on fast-turnover and PID-randomising systems, which were getting
1059 out-of-order delivery.
1061 JH/30 Fix a logging bug on aarch64: an unsafe routine was previously used for
1062 a possibly-overlapping copy. The symptom was that "Remote host closed
1063 connection in response to HELO" was logged instead of the actual 4xx
1066 JH/31 Fix CHUNKING code to properly flush the unwanted chunk after an error.
1067 Previously only that bufferd was discarded, resulting in SYMTP command
1070 JH/32 DKIM: when a message has multiple signatures matching an identity given
1071 in dkim_verify_signers, run the dkim acl once for each. Previously only
1072 one run was done. Bug 2189.
1074 JH/33 Downgrade an unfound-list name (usually a typo in the config file) from
1075 "panic the current process" to "deliberately defer". The panic log is
1076 still written with the problem list name; the mail and reject logs now
1077 get a temp-reject line for the message that was being handled, saying
1078 something like "domains check lookup or other defer". The SMTP 451
1079 message is still "Temporary local problem".
1081 JH/34 Bug 2199: Fix a use-after-free while reading smtp input for header lines.
1082 A crafted sequence of BDAT commands could result in in-use memory beeing
1083 freed. CVE-2017-16943.
1085 HS/03 Bug 2201: Fix checking for leading-dot on a line during headers reading
1086 from SMTP input. Previously it was always done; now only done for DATA
1087 and not BDAT commands. CVE-2017-16944.
1089 JH/35 Bug 2201: Flush received data in BDAT mode after detecting an error fatal
1090 to the message (such as an overlong header line). Previously this was
1091 not done and we did not exit BDAT mode. Followon from the previous item
1092 though a different problem.
1098 JH/01 Bug 1922: Support IDNA2008. This has slightly different conversion rules
1099 than -2003 did; needs libidn2 in addition to libidn.
1101 JH/02 The path option on a pipe transport is now expanded before use.
1103 PP/01 GitHub PR 50: Do not call ldap_start_tls_s on ldapi:// connections.
1104 Patch provided by "Björn", documentation fix added too.
1106 JH/03 Bug 2003: fix Proxy Protocol v2 handling: the address size field was
1107 missing a wire-to-host endian conversion.
1109 JH/04 Bug 2004: fix CHUNKING in non-PIPELINEING mode. Chunk data following
1110 close after a BDAT command line could be taken as a following command,
1111 giving a synch failure. Fix by only checking for synch immediately
1112 before acknowledging the chunk.
1114 PP/02 GitHub PR 52: many spelling fixes, which include fixing parsing of
1115 no_require_dnssec option and creation of _HAVE_TRANSPORT_APPEND_MAILDIR
1116 macro. Patches provided by Josh Soref.
1118 JH/05 Have the EHLO response advertise VRFY, if there is a vrfy ACL defined.
1119 Previously we did not; the RFC seems ambiguous and VRFY is not listed
1120 by IANA as a service extension. However, John Klensin suggests that we
1123 JH/06 Bug 2017: Fix DKIM verification in -bh test mode. The data feed into
1124 the dkim code may be unix-mode line endings rather than smtp wire-format
1125 CRLF, so prepend a CR to any bare LF.
1127 JH/07 Rationalise the coding for callout smtp conversations and transport ones.
1128 As a side-benfit, callouts can now use PIPELINING hence fewer round-trips.
1130 JH/08 Bug 2016: Fix DKIM verification vs. CHUNKING. Any BDAT commands after
1131 the first were themselves being wrongly included in the feed into dkim
1132 processing; with most chunk sizes in use this resulted in an incorrect
1133 body hash calculated value.
1135 JH/09 Bug 2014: permit inclusion of a DKIM-Signature header in a received
1136 DKIM signature block, for verification. Although advised against by
1137 standards it is specifically not ruled illegal.
1139 JH/10 Bug 2025: Fix reception of (quoted) local-parts with embedded spaces.
1141 JH/11 Bug 2029: Fix crash in DKIM verification when a message signature block is
1142 missing a body hash (the bh= tag).
1144 JH/12 Bug 2018: Re-order Proxy Protocol startup versus TLS-on-connect startup.
1145 It seems that HAProxy sends the Proxy Protocol information in clear and
1146 only then does a TLS startup, so do the same.
1148 JH/13 Bug 2027: Avoid attempting to use TCP Fast Open for non-transport client
1149 TCP connections (such as for Spamd) unless the daemon successfully set
1150 Fast Open mode on its listening sockets. This fixes breakage seen on
1151 too-old kernels or those not configured for Fast Open, at the cost of
1152 requiring both directions being enabled for TFO, and TFO never being used
1153 by non-daemon-related Exim processes.
1155 JH/14 Bug 2000: Reject messages recieved with CHUNKING but with malformed line
1156 endings, at least on the first header line. Try to canonify any that get
1157 past that check, despite the cost.
1159 JH/15 Angle-bracket nesting (an error inserted by broken sendmails) levels are
1160 now limited to an arbitrary five deep, while parsing addresses with the
1161 strip_excess_angle_brackets option enabled.
1163 PP/03 Bug 2018: For Proxy Protocol and TLS-on-connect, do not over-read and
1164 instead leave the unprompted TLS handshake in socket buffer for the
1165 TLS library to consume.
1167 PP/04 Bug 2018: Also handle Proxy Protocol v2 safely.
1169 PP/05 FreeBSD compat: handle that Ports no longer create /usr/bin/perl
1171 JH/16 Drop variables when they go out of scope. Memory management drops a whole
1172 region in one operation, for speed, and this leaves assigned pointers
1173 dangling. Add checks run only under the testsuite which checks all
1174 variables at a store-reset and panics on a dangling pointer; add code
1175 explicitly nulling out all the variables discovered. Fixes one known
1176 bug: a transport crash, where a dangling pointer for $sending_ip_address
1177 originally assigned in a verify callout, is re-used.
1179 PP/06 Drop '.' from @INC in various Perl scripts.
1181 PP/07 Switch FreeBSD iconv to always use the base-system libc functions.
1183 PP/08 Reduce a number of compilation warnings under clang; building with
1184 CC=clang CFLAGS+=-Wno-dangling-else -Wno-logical-op-parentheses
1185 should be warning-free.
1187 JH/17 Fix inbound CHUNKING when DKIM disabled at runtime.
1189 HS/01 Fix portability problems introduced by PP/08 for platforms where
1190 realloc(NULL) is not equivalent to malloc() [SunOS et al].
1192 HS/02 Bug 1974: Fix missing line terminator on the last received BDAT
1193 chunk. This allows us to accept broken chunked messages. We need a more
1194 general solution here.
1196 PP/09 Wrote util/chunking_fixqueue_finalnewlines.pl to help recover
1197 already-broken messages in the queue.
1199 JH/18 Bug 2061: Fix ${extract } corrupting an enclosing ${reduce } $value.
1201 JH/19 Fix reference counting bug in routing-generated-address tracking.
1207 JH/01 Use SIZE on MAIL FROM in a cutthrough connection, if the destination
1208 supports it and a size is available (ie. the sending peer gave us one).
1210 JH/02 The obsolete acl condition "demime" is removed (finally, after ten
1211 years of being deprecated). The replacements are the ACLs
1212 acl_smtp_mime and acl_not_smtp_mime.
1214 JH/03 Upgrade security requirements imposed for hosts_try_dane: previously
1215 a downgraded non-dane trust-anchor for the TLS connection (CA-style)
1216 or even an in-clear connection were permitted. Now, if the host lookup
1217 was dnssec and dane was requested then the host is only used if the
1218 TLSA lookup succeeds and is dnssec. Further hosts (eg. lower priority
1219 MXs) will be tried (for hosts_try_dane though not for hosts_require_dane)
1220 if one fails this test.
1221 This means that a poorly-configured remote DNS will make it incommunicado;
1222 but it protects against a DNS-interception attack on it.
1224 JH/04 Bug 1810: make continued-use of an open smtp transport connection
1225 non-noisy when a race steals the message being considered.
1227 JH/05 If main configuration option tls_certificate is unset, generate a
1228 self-signed certificate for inbound TLS connections.
1230 JH/06 Bug 165: hide more cases of password exposure - this time in expansions
1231 in rewrites and routers.
1233 JH/07 Retire gnutls_require_mac et.al. These were nonfunctional since 4.80
1234 and logged a warning sing 4.83; now they are a configuration file error.
1236 JH/08 Bug 1836: Fix crash in VRFY handling when handed an unqualified name
1237 (lacking @domain). Apply the same qualification processing as RCPT.
1239 JH/09 Bug 1804: Avoid writing msglog files when in -bh or -bhc mode.
1241 JH/10 Support ${sha256:} applied to a string (as well as the previous
1244 JH/11 Cutthrough: avoid using the callout hints db on a verify callout when
1245 a cutthrough deliver is pending, as we always want to make a connection.
1246 This also avoids re-routing the message when later placing the cutthrough
1247 connection after a verify cache hit.
1248 Do not update it with the verify result either.
1250 JH/12 Cutthrough: disable when verify option success_on_redirect is used, and
1251 when routing results in more than one destination address.
1253 JH/13 Cutthrough: expand transport dkim_domain option when testing for dkim
1254 signing (which inhibits the cutthrough capability). Previously only
1255 the presence of an option was tested; now an expansion evaluating as
1256 empty is permissible (obviously it should depend only on data available
1257 when the cutthrough connection is made).
1259 JH/14 Fix logging of errors under PIPELINING. Previously the log line giving
1260 the relevant preceding SMTP command did not note the pipelining mode.
1262 JH/15 Fix counting of empty lines in $body_linecount and $message_linecount.
1263 Previously they were not counted.
1265 JH/16 DANE: treat a TLSA lookup response having all non-TLSA RRs, the same
1266 as one having no matching records. Previously we deferred the message
1267 that needed the lookup.
1269 JH/17 Fakereject: previously logged as a normal message arrival "<="; now
1270 distinguished as "(=".
1272 JH/18 Bug 1867: make the fail_defer_domains option on a dnslookup router work
1273 for missing MX records. Previously it only worked for missing A records.
1275 JH/19 Bug 1850: support Radius libraries that return REJECT_RC.
1277 JH/20 Bug 1872: Ensure that acl_smtp_notquit is run when the connection drops
1278 after the data-go-ahead and data-ack. Patch from Jason Betts.
1280 JH/21 Bug 1846: Send DMARC forensic reports for reject and quarantine results,
1281 even for a "none" policy. Patch from Tony Meyer.
1283 JH/22 Fix continued use of a connection for further deliveries. If a port was
1284 specified by a router, it must also match for the delivery to be
1287 JH/23 Bug 1874: fix continued use of a connection for further deliveries.
1288 When one of the recipients of a message was unsuitable for the connection
1289 (has no matching addresses), we lost track of needing to mark it
1290 deferred. As a result mail would be lost.
1292 JH/24 Bug 1832: Log EHLO response on getting conn-close response for HELO.
1294 JH/25 Decoding ACL controls is now done using a binary search; the source code
1295 takes up less space and should be simpler to maintain. Merge the ACL
1296 condition decode tables also, with similar effect.
1298 JH/26 Fix problem with one_time used on a redirect router which returned the
1299 parent address unchanged. A retry would see the parent address marked as
1300 delivered, so not attempt the (identical) child. As a result mail would
1303 JH/27 Fix a possible security hole, wherein a process operating with the Exim
1304 UID can gain a root shell. Credit to http://www.halfdog.net/ for
1305 discovery and writeup. Ubuntu bug 1580454; no bug raised against Exim
1308 JH/28 Enable {spool,log} filesystem space and inode checks as default.
1309 Main config options check_{log,spool}_{inodes,space} are now
1310 100 inodes, 10MB unless set otherwise in the configuration.
1312 JH/29 Fix the connection_reject log selector to apply to the connect ACL.
1313 Previously it only applied to the main-section connection policy
1316 JH/30 Bug 1897: fix callouts connection fallback from TLS to cleartext.
1318 PP/01 Changed default Diffie-Hellman parameters to be Exim-specific, created
1319 by me. Added RFC7919 DH primes as an alternative.
1321 PP/02 Unbreak build via pkg-config with new hash support when crypto headers
1322 are not in the system include path.
1324 JH/31 Fix longstanding bug with aborted TLS server connection handling. Under
1325 GnuTLS, when a session startup failed (eg because the client disconnected)
1326 Exim did stdio operations after fclose. This was exposed by a recent
1327 change which nulled out the file handle after the fclose.
1329 JH/32 Bug 1909: Fix OCSP proof verification for cases where the proof is
1330 signed directly by the cert-signing cert, rather than an intermediate
1331 OCSP-signing cert. This is the model used by LetsEncrypt.
1333 JH/33 Bug 1914: Ensure socket is nonblocking before draining after SMTP QUIT.
1335 HS/01 Fix leak in verify callout under GnuTLS, about 3MB per recipient on
1336 an incoming connection.
1338 HS/02 Bug 1802: Do not half-close the connection after sending a request
1341 HS/03 Use "auto" as the default EC curve parameter. For OpenSSL < 1.0.2
1342 fallback to "prime256v1".
1344 JH/34 SECURITY: Use proper copy of DATA command in error message.
1345 Could leak key material. Remotely exploitable. CVE-2016-9963.
1351 JH/01 Bug 1664: Disable OCSP for GnuTLS library versions at/before 3.3.16
1352 and 3.4.4 - once the server is enabled to respond to an OCSP request
1353 it does even when not requested, resulting in a stapling non-aware
1354 client dropping the TLS connection.
1356 TF/01 Code cleanup: Overhaul the debug_selector and log_selector machinery to
1357 support variable-length bit vectors. No functional change.
1359 TF/02 Improve the consistency of logging incoming and outgoing interfaces.
1360 The I= interface field on outgoing lines is now after the H= remote
1361 host field, same as incoming lines. There is a separate
1362 outgoing_interface log selector which allows you to disable the
1365 JH/02 Bug 728: Close logfiles after a daemon-process "exceptional" log write.
1366 If not running log_selector +smtp_connection the mainlog would be held
1367 open indefinitely after a "too many connections" event, including to a
1368 deleted file after a log rotate. Leave the per net connection logging
1369 leaving it open for efficiency as that will be quickly detected by the
1370 check on the next write.
1372 HS/01 Bug 1671: Fix post transport crash.
1373 Processing the wait-<transport> messages could crash the delivery
1374 process if the message IDs didn't exist for some reason. When
1375 using 'split_spool_directory=yes' the construction of the spool
1376 file name failed already, exposing the same netto behaviour.
1378 JH/03 Bug 425: Capture substrings in $regex1, $regex2 etc from regex &
1379 mime_regex ACL conditions.
1381 JH/04 Bug 1686: When compiled with EXPERIMENTAL_DSN_INFO: Add extra information
1382 to DSN fail messages (bounces): remote IP, remote greeting, remote response
1383 to HELO, local diagnostic string.
1385 JH/05 Downgrade message for a TLS-certificate-based authentication fail from
1386 log line to debug. Even when configured with a tls authenticator many
1387 client connections are expected to not authenticate in this way, so
1388 an authenticate fail is not an error.
1390 HS/02 Add the Exim version string to the process info. This way exiwhat
1391 gives some more detail about the running daemon.
1393 JH/06 Bug 1395: time-limit caching of DNS lookups, to the TTL value. This may
1394 matter for fast-change records such as DNSBLs.
1396 JH/07 Bug 1678: Always record an interface option value, if set, as part of a
1397 retry record, even if constant. There may be multiple transports with
1398 different interface settings and the retry behaviour needs to be kept
1401 JH/08 Bug 1586: exiqgrep now refuses to run if there are unexpected arguments.
1403 JH/09 Bug 1700: ignore space & tab embedded in base64 during decode.
1405 JH/10 Bug 840: fix log_defer_output option of pipe transport
1407 JH/11 Bug 830: use same host for all RCPTS of a message, even under
1408 hosts_randomize. This matters a lot when combined with mua_wrapper.
1410 JH/12 Bug 1706: percent and underbar characters are no longer escaped by the
1411 ${quote_pgsql:<string>} operator.
1413 JH/13 Bug 1708: avoid misaligned access in cached lookup.
1415 JH/14 Change header file name for freeradius-client. Relevant if compiling
1416 with Radius support; from the Gentoo tree and checked under Fedora.
1418 JH/15 Bug 1712: Introduce $prdr_requested flag variable
1420 JH/16 Bug 1714: Permit an empty string as expansion result for transport
1421 option transport_filter, meaning no filtering.
1423 JH/17 Bug 1713: Fix non-PDKIM_DEBUG build. Patch from Jasen Betts.
1425 JH/18 Bug 1709: When built with TLS support, the tls_advertise_hosts option now
1426 defaults to "*" (all hosts). The variable is now available when not built
1427 with TLS, default unset, mainly to enable keeping the testsuite sane.
1428 If a server certificate is not supplied (via tls_certificate) an error is
1429 logged, and clients will find TLS connections fail on startup. Presumably
1430 they will retry in-clear.
1431 Packagers of Exim are strongly encouraged to create a server certificate
1432 at installation time.
1434 HS/03 Add -bP config_file as a synonym for -bP configure_file, for consistency
1435 with the $config_file variable.
1437 JH/19 Two additional event types: msg:rcpt:defer and msg:rcpt:host:defer. Both
1438 in transport context, after the attempt, and per-recipient. The latter type
1439 is per host attempted. The event data is the error message, and the errno
1440 information encodes the lookup type (A vs. MX) used for the (first) host,
1441 and the trailing two digits of the smtp 4xx response.
1443 GF/01 Bug 1715: Fix for race condition in exicyclog, where exim could attempt
1444 to write to mainlog (or rejectlog, paniclog) in the window between file
1445 creation and permissions/ownership being changed. Particularly affects
1446 installations where exicyclog is run as root, rather than exim user;
1447 result is that the running daemon panics and dies.
1449 JH/20 Bug 1701: For MySQL lookups, support MySQL config file option group names.
1451 JH/21 Bug 1720: Add support for priority groups and weighted-random proxy
1452 selection for the EXPERIMENTAL_SOCKS feature, via new per-proxy options
1453 "pri" and "weight". Note that the previous implicit priority given by the
1454 list order is no longer honoured.
1456 JH/22 Bugs 963, 1721: Fix some corner cases in message body canonicalization
1457 for DKIM processing.
1459 JH/23 Move SOCKS5 support from Experimental to mainline, enabled for a build
1460 by defining SUPPORT_SOCKS.
1462 JH/26 Move PROXY support from Experimental to mainline, enabled for a build
1463 by defining SUPPORT_PROXY. Note that the proxy_required_hosts option
1464 is renamed to hosts_proxy, and the proxy_{host,target}_{address,port}.
1465 variables are renamed to proxy_{local,external}_{address,port}.
1467 JH/27 Move Internationalisation support from Experimental to mainline, enabled
1468 for a build by defining SUPPORT_I18N
1470 JH/28 Bug 1745: Fix redis lookups to handle (quoted) spaces embedded in parts
1471 of the query string, and make ${quote_redis:} do that quoting.
1473 JH/29 Move Events support from Experimental to mainline, enabled by default
1474 and removable for a build by defining DISABLE_EVENT.
1476 JH/30 Updated DANE implementation code to current from Viktor Dukhovni.
1478 JH/31 Fix bug with hosts_connection_nolog and named-lists which were wrongly
1479 cached by the daemon.
1481 JH/32 Move Redis support from Experimental to mainline, enabled for a build
1482 by defining LOOKUP_REDIS. The libhiredis library is required.
1484 JH/33 Bug 1748: Permit ACL dnslists= condition in non-smtp ACLs if explicit
1485 keys are given for lookup.
1487 JH/34 Bug 1192: replace the embedded copy of PolarSSL RSA routines in the DKIM
1488 support, by using OpenSSL or GnuTLS library ones. This means DKIM is
1489 only supported when built with TLS support. The PolarSSL SHA routines
1490 are still used when the TLS library is too old for convenient support.
1492 JH/35 Require SINGLE_DH_USE by default in OpenSSL (main config option
1493 openssl_options), for security. OpenSSL forces this from version 1.1.0
1494 server-side so match that on older versions.
1496 JH/36 Bug 1778: longstanding bug in memory use by the ${run } expansion: A fresh
1497 allocation for $value could be released as the expansion processing
1498 concluded, but leaving the global pointer active for it.
1500 JH/37 Bug 1769: Permit a VRFY ACL to override the default 252 response,
1501 and to use the domains and local_parts ACL conditions.
1503 JH/38 Fix cutthrough bug with body lines having a single dot. The dot was
1504 incorrectly not doubled on cutthrough transmission, hence seen as a
1505 body-termination at the receiving system - resulting in truncated mails.
1506 Commonly the sender saw a TCP-level error, and retransmitted the message
1507 via the normal store-and-forward channel. This could result in duplicates
1508 received - but deduplicating mailstores were liable to retain only the
1509 initial truncated version.
1511 JH/39 Bug 1781: Fix use of DKIM private-keys having trailing '=' in the base-64.
1513 JH/40 Fix crash in queryprogram router when compiled with EXPERIMENTAL_SRS.
1515 JH/41 Bug 1792: Fix selection of headers to sign for DKIM: bottom-up. While
1516 we're in there, support oversigning also; bug 1309.
1518 JH/42 Bug 1796: Fix error logged on a malware scanner connection failure.
1520 HS/04 Add support for keep_environment and add_environment options.
1522 JH/43 Tidy coding issues detected by gcc --fsanitize=undefined. Some remain;
1523 either intentional arithmetic overflow during PRNG, or testing config-
1526 JH/44 Bug 1800: The combination of a -bhc commandline option and cutthrough
1527 delivery resulted in actual delivery. Cancel cutthrough before DATA
1530 JH/45 Fix cutthrough, when connection not opened by verify and target hard-
1531 rejects a recipient: pass the reject to the originator.
1533 JH/46 Multiple issues raised by Coverity. Some were obvious or plausible bugs.
1534 Many were false-positives and ignorable, but it's worth fixing the
1537 JH/47 Fix build on HP-UX and older Solaris, which need (un)setenv now also
1538 for the new environment-manipulation done at startup. Move the routines
1539 from being local to tls.c to being global via the os.c file.
1541 JH/48 Bug 1807: Fix ${extract } for the numeric/3-string case. While preparsing
1542 an extract embedded as result-arg for a map, the first arg for extract
1543 is unavailable so we cannot tell if this is a numbered or keyed
1544 extraction. Accept either.
1550 JH/01 Bug 1545: The smtp transport option "retry_include_ip_address" is now
1553 JH/02 The smtp transport option "multi_domain" is now expanded.
1555 JH/03 The smtp transport now requests PRDR by default, if the server offers
1558 JH/04 Certificate name checking on server certificates, when exim is a client,
1559 is now done by default. The transport option tls_verify_cert_hostnames
1560 can be used to disable this per-host. The build option
1561 EXPERIMENTAL_CERTNAMES is withdrawn.
1563 JH/05 The value of the tls_verify_certificates smtp transport and main options
1564 default to the word "system" to access the system default CA bundle.
1565 For GnuTLS, only version 3.0.20 or later.
1567 JH/06 Verification of the server certificate for a TLS connection is now tried
1568 (but not required) by default. The verification status is now logged by
1569 default, for both outbound TLS and client-certificate supplying inbound
1572 JH/07 Changed the default rfc1413 lookup settings to disable calls. Few
1575 JH/08 The EXPERIMENTAL_DSN compile option is no longer needed; all Delivery
1576 Status Notification (bounce) messages are now MIME format per RFC 3464.
1577 Support for RFC 3461 DSN options NOTIFY,ENVID,RET,ORCPT can be advertised
1578 under the control of the dsn_advertise_hosts option, and routers may
1579 have a dsn_lasthop option.
1581 JH/09 A timeout of 2 minutes is now applied to all malware scanner types by
1582 default, modifiable by a malware= option. The list separator for
1583 the options can now be changed in the usual way. Bug 68.
1585 JH/10 The smtp_receive_timeout main option is now expanded before use.
1587 JH/11 The incoming_interface log option now also enables logging of the
1588 local interface on delivery outgoing connections.
1590 JH/12 The cutthrough-routing facility now supports multi-recipient mails,
1591 if the interface and destination host and port all match.
1593 JH/13 Bug 344: The verify = reverse_host_lookup ACL condition now accepts a
1596 JH/14 Bug 1573: The spam= ACL condition now additionally supports Rspamd.
1597 Patch from Andrew Lewis.
1599 JH/15 Bug 670: The spamd_address main option (for the spam= ACL condition)
1600 now supports optional time-restrictions, weighting, and priority
1601 modifiers per server. Patch originally by <rommer@active.by>.
1603 JH/16 The spamd_address main option now supports a mixed list of local
1604 and remote servers. Remote servers can be IPv6 addresses, and
1605 specify a port-range.
1607 JH/17 Bug 68: The spamd_address main option now supports an optional
1608 timeout value per server.
1610 JH/18 Bug 1581: Router and transport options headers_add/remove can
1611 now have the list separator specified.
1613 JH/19 Bug 392: spamd_address, and clamd av_scanner, now support retry
1616 JH/20 Bug 1571: Ensure that $tls_in_peerdn is set, when verification fails
1619 JH/21 Support for the A6 type of dns record is withdrawn.
1621 JH/22 Bug 608: The result of a QUIT or not-QUIT toplevel ACL now matters
1622 rather than the verbs used.
1624 JH/23 Bug 1572: Increase limit on SMTP confirmation message copy size
1625 from 255 to 1024 chars.
1627 JH/24 Verification callouts now attempt to use TLS by default.
1629 HS/01 DNSSEC options (dnssec_require_domains, dnssec_request_domains)
1630 are generic router options now. The defaults didn't change.
1632 JH/25 Bug 466: Add RFC2322 support for MIME attachment filenames.
1633 Original patch from Alexander Shikoff, worked over by JH.
1635 HS/02 Bug 1575: exigrep falls back to autodetection of compressed
1636 files if ZCAT_COMMAND is not executable.
1638 JH/26 Bug 1539: Add timeout/retry options on dnsdb lookups.
1640 JH/27 Bug 286: Support SOA lookup in dnsdb lookups.
1642 JH/28 Bug 1588: Do not use the A lookup following an AAAA for setting the FQDN.
1643 Normally benign, it bites when the pair was led to by a CNAME;
1644 modern usage is to not canonicalize the domain to a CNAME target
1645 (and we were inconsistent anyway for A-only vs AAAA+A).
1647 JH/29 Bug 1632: Removed the word "rejected" from line logged for ACL discards.
1649 JH/30 Check the forward DNS lookup for DNSSEC, in addition to the reverse,
1650 when evaluating $sender_host_dnssec.
1652 JH/31 Check the HELO verification lookup for DNSSEC, adding new
1653 $sender_helo_dnssec variable.
1655 JH/32 Bug 1397: Enable ECDHE on OpenSSL, just the NIST P-256 curve.
1657 JH/33 Bug 1346: Note MAIL cmd seen in -bS batch, to avoid smtp_no_mail log.
1659 JH/34 Bug 1648: Fix a memory leak seen with "mailq" and large queues.
1661 JH/35 Bug 1642: Fix support of $spam_ variables at delivery time. Was
1662 documented as working, but never had. Support all but $spam_report.
1664 JH/36 Bug 1659: Guard checking of input smtp commands again pseudo-command
1665 added for tls authenticator.
1667 HS/03 Add perl_taintmode main config option
1673 TL/01 When running the test suite, the README says that variables such as
1674 no_msglog_check are global and can be placed anywhere in a specific
1675 test's script, however it was observed that placement needed to be near
1676 the beginning for it to behave that way. Changed the runtest perl
1677 script to read through the entire script once to detect and set these
1678 variables, reset to the beginning of the script, and then run through
1679 the script parsing/test process like normal.
1681 TL/02 The BSD's have an arc4random API. One of the functions to induce
1682 adding randomness was arc4random_stir(), but it has been removed in
1683 OpenBSD 5.5. Detect this OpenBSD version and skip calling this
1684 function when detected.
1686 JH/01 Expand the EXPERIMENTAL_TPDA feature. Several different events now
1687 cause callback expansion.
1689 TL/03 Bugzilla 1518: Clarify "condition" processing in routers; that
1690 syntax errors in an expansion can be treated as a string instead of
1691 logging or causing an error, due to the internal use of bool_lax
1692 instead of bool when processing it.
1694 JH/02 Add EXPERIMENTAL_DANE, allowing for using the DNS as trust-anchor for
1695 server certificates when making smtp deliveries.
1697 JH/03 Support secondary-separator specifier for MX, SRV, TLSA lookups.
1699 JH/04 Add ${sort {list}{condition}{extractor}} expansion item.
1701 TL/04 Bugzilla 1216: Add -M (related messages) option to exigrep.
1703 TL/05 GitHub Issue 18: Adjust logic testing for true/false in redis lookups.
1704 Merged patch from Sebastian Wiedenroth.
1706 JH/05 Fix results-pipe from transport process. Several recipients, combined
1707 with certificate use, exposed issues where response data items split
1708 over buffer boundaries were not parsed properly. This eventually
1709 resulted in duplicates being sent. This issue only became common enough
1710 to notice due to the introduction of connection certificate information,
1711 the item size being so much larger. Found and fixed by Wolfgang Breyha.
1713 JH/06 Bug 1533: Fix truncation of items in headers_remove lists. A fixed
1714 size buffer was used, resulting in syntax errors when an expansion
1717 JH/07 Add support for directories of certificates when compiled with a GnuTLS
1718 version 3.3.6 or later.
1720 JH/08 Rename the TPDA experimental facility to Event Actions. The #ifdef
1721 is EXPERIMENTAL_EVENT, the main-configuration and transport options
1722 both become "event_action", the variables become $event_name, $event_data
1723 and $event_defer_errno. There is a new variable $verify_mode, usable in
1724 routers, transports and related events. The tls:cert event is now also
1725 raised for inbound connections, if the main configuration event_action
1728 TL/06 In test suite, disable OCSP for old versions of openssl which contained
1729 early OCSP support, but no stapling (appears to be less than 1.0.0).
1731 JH/09 When compiled with OpenSSL and EXPERIMENTAL_CERTNAMES, the checks on
1732 server certificate names available under the smtp transport option
1733 "tls_verify_cert_hostname" now do not permit multi-component wildcard
1736 JH/10 Time-related extraction expansions from certificates now use the main
1737 option "timezone" setting for output formatting, and are consistent
1738 between OpenSSL and GnuTLS compilations. Bug 1541.
1740 JH/11 Fix a crash in mime ACL when meeting a zero-length, quoted or RFC2047-
1741 encoded parameter in the incoming message. Bug 1558.
1743 JH/12 Bug 1527: Autogrow buffer used in reading spool files. Since they now
1744 include certificate info, eximon was claiming there were spoolfile
1747 JH/13 Bug 1521: Fix ldap lookup for single-attr request, multiple-attr return.
1749 JH/14 Log delivery-related information more consistently, using the sequence
1750 "H=<name> [<ip>]" wherever possible.
1752 TL/07 Bug 1547: Omit RFCs from release. Draft and RFCs have licenses which
1753 are problematic for Debian distribution, omit them from the release
1756 JH/15 Updates and fixes to the EXPERIMENTAL_DSN feature.
1758 JH/16 Fix string representation of time values on 64bit time_t architectures.
1761 JH/17 Fix a null-indirection in certextract expansions when a nondefault
1762 output list separator was used.
1767 TL/01 Bugzilla 1506: Re-add a 'return NULL' to silence complaints from static
1768 checkers that were complaining about end of non-void function with no
1771 JH/01 Bug 1513: Fix parsing of quoted parameter values in MIME headers.
1772 This was a regression introduced in 4.83 by another bugfix.
1774 JH/02 Fix broken compilation when EXPERIMENTAL_DSN is enabled.
1776 TL/02 Bug 1509: Fix exipick for enhanced spoolfile specification used when
1777 EXPERIMENTAL_DSN is enabled. Fix from Wolfgang Breyha.
1783 TF/01 Correctly close the server side of TLS when forking for delivery.
1785 When a message was received over SMTP with TLS, Exim failed to clear up
1786 the incoming connection properly after forking off the child process to
1787 deliver the message. In some situations the subsequent outgoing
1788 delivery connection happened to have the same fd number as the incoming
1789 connection previously had. Exim would try to use TLS and fail, logging
1790 a "Bad file descriptor" error.
1792 TF/02 Portability fix for building lookup modules on Solaris when the xpg4
1793 utilities have not been installed.
1795 JH/01 Fix memory-handling in use of acl as a conditional; avoid free of
1796 temporary space as the ACL may create new global variables.
1798 TL/01 LDAP support uses per connection or global context settings, depending
1799 upon the detected version of the libraries at build time.
1801 TL/02 Experimental Proxy Protocol support: allows a proxied SMTP connection
1802 to extract and use the src ip:port in logging and expansions as if it
1803 were a direct connection from the outside internet. PPv2 support was
1804 updated based on HAProxy spec change in May 2014.
1806 JH/02 Add ${listextract {number}{list}{success}{fail}}.
1808 TL/03 Bugzilla 1433: Fix DMARC SEGV with specific From header contents.
1809 Properly escape header and check for NULL return.
1811 PP/01 Continue incomplete 4.82 PP/19 by fixing docs too: use dns_dnssec_ok
1814 JH/03 Bugzilla 1157: support log_selector smtp_confirmation for lmtp.
1816 TL/04 Add verify = header_names_ascii check to reject email with non-ASCII
1817 characters in header names, implemented as a verify condition.
1818 Contributed by Michael Fischer v. Mollard.
1820 TL/05 Rename SPF condition results err_perm and err_temp to standardized
1821 results permerror and temperror. Previous values are deprecated but
1822 still accepted. In a future release, err_perm and err_temp will be
1823 completely removed, which will be a backward incompatibility if the
1824 ACL tests for either of these two old results. Patch contributed by
1825 user bes-internal on the mailing list.
1827 JH/04 Add ${utf8clean:} operator. Contributed by Alex Rau.
1829 JH/05 Bugzilla 305: Log incoming-TLS details on rejects, subject to log
1830 selectors, in both main and reject logs.
1832 JH/06 Log outbound-TLS and port details, subject to log selectors, for a
1835 JH/07 Add malware type "sock" for talking to simple daemon.
1837 JH/08 Bugzilla 1371: Add tls_{,try_}verify_hosts to smtp transport.
1839 JH/09 Bugzilla 1431: Support (with limitations) headers_add/headers_remove in
1840 routers/transports under cutthrough routing.
1842 JH/10 Bugzilla 1005: ACL "condition =" should accept values which are negative
1843 numbers. Touch up "bool" conditional to keep the same definition.
1845 TL/06 Remove duplicated language in spec file from 4.82 TL/16.
1847 JH/11 Add dnsdb tlsa lookup. From Todd Lyons.
1849 JH/12 Expand items in router/transport headers_add or headers_remove lists
1850 individually rather than the list as a whole. Bug 1452.
1852 Required for reasonable handling of multiple headers_ options when
1853 they may be empty; requires that headers_remove items with embedded
1854 colons must have them doubled (or the list-separator changed).
1856 TL/07 Add new dmarc expansion variable $dmarc_domain_policy to directly
1857 view the policy declared in the DMARC record. Currently, $dmarc_status
1858 is a combined value of both the record presence and the result of the
1861 JH/13 Fix handling of $tls_cipher et.al. in (non-verify) transport. Bug 1455.
1863 JH/14 New options dnssec_request_domains, dnssec_require_domains on the
1864 dnslookup router and the smtp transport (applying to the forward
1867 TL/08 Bugzilla 1453: New LDAP "SERVERS=" option allows admin to override list
1868 of ldap servers used for a specific lookup. Patch provided by Heiko
1871 JH/18 New options dnssec_lax, dnssec_strict on dnsdb lookups.
1872 New variable $lookup_dnssec_authenticated for observability.
1874 TL/09 Bugzilla 609: Add -C option to exiqgrep, specify which exim.conf to use.
1875 Patch submitted by Lars Timman.
1877 JH/19 EXPERIMENTAL_OCSP support under GnuTLS. Bug 1459.
1879 TL/10 Bugzilla 1454: New -oMm option to pass message reference to Exim.
1880 Requires trusted mode and valid format message id, aborts otherwise.
1881 Patch contributed by Heiko Schlichting.
1883 JH/20 New expansion variables tls_(in,out)_(our,peer)cert, and expansion item
1884 certextract with support for various fields. Bug 1358.
1886 JH/21 Observability of OCSP via variables tls_(in,out)_ocsp. Stapling
1887 is requested by default, modifiable by smtp transport option
1890 JH/22 Expansion operators ${md5:string} and ${sha1:string} can now
1891 operate on certificate variables to give certificate fingerprints
1892 Also new ${sha256:cert_variable}.
1894 JH/23 The PRDR feature is moved from being Experimental into the mainline.
1896 TL/11 Bug 1119: fix memory allocation in string_printing2(). Patch from
1897 Christian Aistleitner.
1899 JH/24 The OCSP stapling feature is moved from Experimental into the mainline.
1901 TL/12 Bug 1444: Fix improper \r\n sequence handling when writing spool
1902 file. Patch from Wolfgang Breyha.
1904 JH/25 Expand the coverage of the delivery $host and $host_address to
1905 client authenticators run in verify callout. Bug 1476.
1907 JH/26 Port service names are now accepted for tls_on_connect_ports, to
1908 align with daemon_smtp_ports. Bug 72.
1910 TF/03 Fix udpsend. The ip_connectedsocket() function's socket type
1911 support and error reporting did not work properly.
1913 TL/13 Bug 1495: Exiqgrep check if -C config file specified on cli exists
1914 and is readable. Patch from Andrew Colin Kissa.
1916 TL/14 Enhance documentation of ${run expansion and how it parses the
1917 commandline after expansion, particularly in the case when an
1918 unquoted variable expansion results in an empty value.
1920 JH/27 The TLS SNI feature was broken in 4.82. Fix it.
1922 PP/02 Fix internal collision of T_APL on systems which support RFC3123
1923 by renaming away from it. Addresses GH issue 15, reported by
1926 JH/28 Fix parsing of MIME headers for parameters with quoted semicolons.
1928 TL/15 SECURITY: prevent double expansion in math comparison functions
1929 (can expand unsanitized data). Not remotely exploitable.
1936 PP/01 Add -bI: framework, and -bI:sieve for querying sieve capabilities.
1938 PP/02 Make -n do something, by making it not do something.
1939 When combined with -bP, the name of an option is not output.
1941 PP/03 Added tls_dh_min_bits SMTP transport driver option, only honoured
1944 PP/04 First step towards DNSSEC, provide $sender_host_dnssec for
1945 $sender_host_name and config options to manage this, and basic check
1948 PP/05 DSCP support for outbound connections and control modifier for inbound.
1950 PP/06 Cyrus SASL: set local and remote IP;port properties for driver.
1951 (Only plugin which currently uses this is kerberos4, which nobody should
1952 be using, but we should make it available and other future plugins might
1953 conceivably use it, even though it would break NAT; stuff *should* be
1954 using channel bindings instead).
1956 PP/07 Handle "exim -L <tag>" to indicate to use syslog with tag as the process
1957 name; added for Sendmail compatibility; requires admin caller.
1958 Handle -G as equivalent to "control = suppress_local_fixups" (we used to
1959 just ignore it); requires trusted caller.
1960 Also parse but ignore: -Ac -Am -X<logfile>
1963 TL/01 Bugzilla 1258 - Refactor MAIL FROM optional args processing.
1965 TL/02 Add +smtp_confirmation as a default logging option.
1967 TL/03 Bugzilla 198 - Implement remove_header ACL modifier.
1968 Patch by Magnus Holmgren from 2007-02-20.
1970 TL/04 Bugzilla 1281 - Spec typo.
1971 Bugzilla 1283 - Spec typo.
1972 Bugzilla 1290 - Spec grammar fixes.
1974 TL/05 Bugzilla 1285 - Spec omission, fix docbook errors for spec.txt creation.
1976 TL/06 Add Experimental DMARC support using libopendmarc libraries.
1978 TL/07 Fix an out of order global option causing a segfault. Reported to dev
1979 mailing list by by Dmitry Isaikin.
1981 JH/01 Bugzilla 1201 & 304 - New cutthrough-delivery feature, with TLS support.
1983 JH/02 Support "G" suffix to numbers in ${if comparisons.
1985 PP/08 Handle smtp transport tls_sni option forced-fail for OpenSSL.
1987 NM/01 Bugzilla 1197 - Spec typo
1988 Bugzilla 1196 - Spec examples corrections
1990 JH/03 Add expansion operators ${listnamed:name} and ${listcount:string}
1992 PP/09 Add gnutls_allow_auto_pkcs11 option (was originally called
1993 gnutls_enable_pkcs11, but renamed to more accurately indicate its
1996 PP/10 Let Linux makefile inherit CFLAGS/CFLAGS_DYNAMIC.
1997 Pulled from Debian 30_dontoverridecflags.dpatch by Andreas Metzler.
1999 JH/04 Add expansion item ${acl {name}{arg}...}, expansion condition
2000 "acl {{name}{arg}...}", and optional args on acl condition
2003 JH/05 Permit multiple router/transport headers_add/remove lines.
2005 JH/06 Add dnsdb pseudo-lookup "a+" to do an "aaaa" + "a" combination.
2007 JH/07 Avoid using a waiting database for a single-message-only transport.
2008 Performance patch from Paul Fisher. Bugzilla 1262.
2010 JH/08 Strip leading/trailing newlines from add_header ACL modifier data.
2013 JH/09 Add $headers_added variable, with content from use of ACL modifier
2014 add_header (but not yet added to the message). Bugzilla 199.
2016 JH/10 Add 8bitmime log_selector, for 8bitmime status on the received line.
2017 Pulled from Bugzilla 817 by Wolfgang Breyha.
2019 PP/11 SECURITY: protect DKIM DNS decoding from remote exploit.
2021 (nb: this is the same fix as in Exim 4.80.1)
2023 JH/11 Add A= logging on delivery lines, and a client_set_id option on
2026 JH/12 Add optional authenticated_sender logging to A= and a log_selector
2029 PP/12 Unbreak server_set_id for NTLM/SPA auth, broken by 4.80 PP/29.
2031 PP/13 Dovecot auth: log better reason to rejectlog if Dovecot did not
2032 advertise SMTP AUTH mechanism to us, instead of a generic
2033 protocol violation error. Also, make Exim more robust to bad
2034 data from the Dovecot auth socket.
2036 TF/01 Fix ultimate retry timeouts for intermittently deliverable recipients.
2038 When a queue runner is handling a message, Exim first routes the
2039 recipient addresses, during which it prunes them based on the retry
2040 hints database. After that it attempts to deliver the message to
2041 any remaining recipients. It then updates the hints database using
2044 So if a recipient address works intermittently, it can get repeatedly
2045 deferred at routing time. The retry hints record remains fresh so the
2046 address never reaches the final cutoff time.
2048 This is a fairly common occurrence when a user is bumping up against
2049 their storage quota. Exim had some logic in its local delivery code
2050 to deal with this. However it did not apply to per-recipient defers
2051 in remote deliveries, e.g. over LMTP to a separate IMAP message store.
2053 This change adds a proper retry rule check during routing so that the
2054 final cutoff time is checked against the message's age. We only do
2055 this check if there is an address retry record and there is not a
2056 domain retry record; this implies that previous attempts to handle
2057 the address had the retry_use_local_parts option turned on. We use
2058 this as an approximation for the destination being like a local
2059 delivery, as in LMTP.
2061 I suspect this new check makes the old local delivery cutoff check
2062 redundant, but I have not verified this so I left the code in place.
2064 TF/02 Correct gecos expansion when From: is a prefix of the username.
2066 Test 0254 submits a message to Exim with the header
2070 When I ran the test suite under the user fanf2, Exim expanded
2071 the header to contain my full name, whereas it should have added
2072 a Resent-Sender: header. It erroneously treats any prefix of the
2073 username as equal to the username.
2075 This change corrects that bug.
2077 GF/01 DCC debug and logging tidyup
2078 Error conditions log to paniclog rather than rejectlog.
2079 Debug lines prefixed by "DCC: " to remove any ambiguity.
2081 TF/03 Avoid unnecessary rebuilds of lookup-related code.
2083 PP/14 Fix OCSP reinitialisation in SNI handling for Exim/TLS as server.
2084 Bug spotted by Jeremy Harris; was flawed since initial commit.
2085 Would have resulted in OCSP responses post-SNI triggering an Exim
2086 NULL dereference and crash.
2088 JH/13 Add $router_name and $transport_name variables. Bugzilla 308.
2090 PP/15 Define SIOCGIFCONF_GIVES_ADDR for GNU Hurd.
2091 Bug detection, analysis and fix by Samuel Thibault.
2092 Bugzilla 1331, Debian bug #698092.
2094 SC/01 Update eximstats to watch out for senders sending 'HELO [IpAddr]'
2096 JH/14 SMTP PRDR (http://www.eric-a-hall.com/specs/draft-hall-prdr-00.txt).
2097 Server implementation by Todd Lyons, client by JH.
2098 Only enabled when compiled with EXPERIMENTAL_PRDR. A new
2099 config variable "prdr_enable" controls whether the server
2100 advertises the facility. If the client requests PRDR a new
2101 acl_data_smtp_prdr ACL is called once for each recipient, after
2102 the body content is received and before the acl_smtp_data ACL.
2103 The client is controlled by both of: a hosts_try_prdr option
2104 on the smtp transport, and the server advertisement.
2105 Default client logging of deliveries and rejections involving
2106 PRDR are flagged with the string "PRDR".
2108 PP/16 Fix problems caused by timeouts during quit ACLs trying to double
2109 fclose(). Diagnosis by Todd Lyons.
2111 PP/17 Update configure.default to handle IPv6 localhost better.
2112 Patch by Alain Williams (plus minor tweaks).
2115 PP/18 OpenSSL made graceful with empty tls_verify_certificates setting.
2116 This is now consistent with GnuTLS, and is now documented: the
2117 previous undocumented portable approach to treating the option as
2118 unset was to force an expansion failure. That still works, and
2119 an empty string is now equivalent.
2121 PP/19 Renamed DNSSEC-enabling option to "dns_dnssec_ok", to make it
2122 clearer that Exim is using the DO (DNSSEC OK) EDNS0 resolver flag,
2123 not performing validation itself.
2125 PP/20 Added force_command boolean option to pipe transport.
2126 Patch from Nick Koston, of cPanel Inc.
2128 JH/15 AUTH support on callouts (and hence cutthrough-deliveries).
2131 TF/04 Added udpsend ACL modifier and hexquote expansion operator
2133 PP/21 Fix eximon continuous updating with timestamped log-files.
2134 Broken in a format-string cleanup in 4.80, missed when I repaired the
2135 other false fix of the same issue.
2136 Report and fix from Heiko Schlichting.
2139 PP/22 Guard LDAP TLS usage against Solaris LDAP variant.
2140 Report from Prashanth Katuri.
2142 PP/23 Support safari_ecdhe_ecdsa_bug for openssl_options.
2143 It's SecureTransport, so affects any MacOS clients which use the
2144 system-integrated TLS libraries, including email clients.
2146 PP/24 Fix segfault from trying to fprintf() to a NULL stdio FILE* if
2147 using a MIME ACL for non-SMTP local injection.
2148 Report and assistance in diagnosis by Warren Baker.
2150 TL/08 Adjust exiqgrep to be case-insensitive for sender/receiver.
2152 JH/16 Fix comparisons for 64b. Bugzilla 1385.
2154 TL/09 Add expansion variable $authenticated_fail_id to keep track of
2155 last id that failed so it may be referenced in subsequent ACL's.
2157 TL/10 Bugzilla 1375 - Prevent TLS rebinding in ldap. Patch provided by
2160 TL/11 Bugzilla 1382 - Option ldap_require_cert overrides start_tls
2161 ldap library initialization, allowing self-signed CA's to be
2162 used. Also properly sets require_cert option later in code by
2163 using NULL (global ldap config) instead of ldap handle (per
2164 session). Bug diagnosis and testing by alxgomz.
2166 TL/12 Enhanced documentation in the ratelimit.pl script provided in
2167 the src/util/ subdirectory.
2169 TL/13 Bug 1031 - Imported transport SQL logging patch from Axel Rau
2170 renamed to Transport Post Delivery Action by Jeremy Harris, as
2173 TL/14 Bugzilla 1217 - Redis lookup support has been added. It is only enabled
2174 when Exim is compiled with EXPERIMENTAL_REDIS. A new config variable
2175 redis_servers = needs to be configured which will be used by the redis
2176 lookup. Patch from Warren Baker, of The Packet Hub.
2178 TL/15 Fix exiqsumm summary for corner case. Patch provided by Richard Hall.
2180 TL/16 Bugzilla 1289 - Clarify host/ip processing when have errors looking up a
2181 hostname or reverse DNS when processing a host list. Used suggestions
2182 from multiple comments on this bug.
2184 TL/17 Bugzilla 1057 - Multiple clamd TCP targets patch from Mark Zealey.
2186 TL/18 Had previously added a -CONTINUE option to runtest in the test suite.
2187 Missed a few lines, added it to make the runtest require no keyboard
2190 TL/19 Bugzilla 1402 - Test 533 fails if any part of the path to the test suite
2191 contains upper case chars. Make router use caseful_local_part.
2193 TL/20 Bugzilla 1400 - Add AVOID_GNUTLS_PKCS11 build option. Allows GnuTLS
2194 support when GnuTLS has been built with p11-kit.
2200 PP/01 SECURITY: protect DKIM DNS decoding from remote exploit.
2202 This, or similar/improved, will also be change PP/11 of 4.82.
2208 PP/01 Handle short writes when writing local log-files.
2209 In practice, only affects FreeBSD (8 onwards).
2210 Bugzilla 1053, with thanks to Dmitry Isaikin.
2212 NM/01 Bugzilla 949 - Documentation tweak
2214 NM/02 Bugzilla 1093 - eximstats DATA reject detection regexps
2217 NM/03 Bugzilla 1169 - primary_hostname spelling was incorrect in docs.
2219 PP/02 Implemented gsasl authenticator.
2221 PP/03 Implemented heimdal_gssapi authenticator with "server_keytab" option.
2223 PP/04 Local/Makefile support for (AUTH|LOOKUP)_*_PC=foo to use
2224 `pkg-config foo` for cflags/libs.
2226 PP/05 Swapped $auth1/$auth2 for gsasl GSSAPI mechanism, to be more consistent
2227 with rest of GSASL and with heimdal_gssapi.
2229 PP/06 Local/Makefile support for USE_(GNUTLS|OPENSSL)_PC=foo to use
2230 `pkg-config foo` for cflags/libs for the TLS implementation.
2232 PP/07 New expansion variable $tls_bits; Cyrus SASL server connection
2233 properties get this fed in as external SSF. A number of robustness
2234 and debugging improvements to the cyrus_sasl authenticator.
2236 PP/08 cyrus_sasl server now expands the server_realm option.
2238 PP/09 Bugzilla 1214 - Log authentication information in reject log.
2239 Patch by Jeremy Harris.
2241 PP/10 Added dbmjz lookup type.
2243 PP/11 Let heimdal_gssapi authenticator take a SASL message without an authzid.
2245 PP/12 MAIL args handles TAB as well as SP, for better interop with
2246 non-compliant senders.
2247 Analysis and variant patch by Todd Lyons.
2249 NM/04 Bugzilla 1237 - fix cases where printf format usage not indicated
2250 Bug report from Lars Müller <lars@samba.org> (via SUSE),
2251 Patch from Dirk Mueller <dmueller@suse.com>
2253 PP/13 tls_peerdn now print-escaped for spool files.
2254 Observed some $tls_peerdn in wild which contained \n, which resulted
2255 in spool file corruption.
2257 PP/14 TLS fixes for OpenSSL: support TLS 1.1 & 1.2; new "openssl_options"
2258 values; set SSL_MODE_AUTO_RETRY so that OpenSSL will retry a read
2259 or write after TLS renegotiation, which otherwise led to messages
2262 TK/01 Bugzilla 1239 - fix DKIM verification when signature was not inserted
2263 as a tracking header (ie: a signed header comes before the signature).
2264 Patch from Wolfgang Breyha.
2266 JH/01 Bugzilla 660 - Multi-valued attributes from ldap now parseable as a
2267 comma-sep list; embedded commas doubled.
2269 JH/02 Refactored ACL "verify =" logic to table-driven dispatch.
2271 PP/15 LDAP: Check for errors of TLS initialisation, to give correct
2273 Report and patch from Dmitry Banschikov.
2275 PP/16 Removed "dont_insert_empty_fragments" from "openssl_options".
2276 Removed SSL_clear() after SSL_new() which led to protocol negotiation
2277 failures. We appear to now support TLS1.1+ with Exim.
2279 PP/17 OpenSSL: new expansion var $tls_sni, which if used in tls_certificate
2280 lets Exim select keys and certificates based upon TLS SNI from client.
2281 Also option tls_sni on SMTP Transports. Also clear $tls_bits correctly
2282 before an outbound SMTP session. New log_selector, +tls_sni.
2284 PP/18 Bugzilla 1122 - check localhost_number expansion for failure, avoid
2285 NULL dereference. Report and patch from Alun Jones.
2287 PP/19 DNS resolver init changes for NetBSD compatibility. (Risk of breakage
2288 on less well tested platforms). Obviates NetBSD pkgsrc patch-ac.
2289 Not seeing resolver debug output on NetBSD, but suspect this is a
2290 resolver implementation change.
2292 PP/20 Revert part of NM/04, it broke log_path containing %D expansions.
2293 Left warnings. Added "eximon gdb" invocation mode.
2295 PP/21 Defaulting "accept_8bitmime" to true, not false.
2297 PP/22 Added -bw for inetd wait mode support.
2299 PP/23 Added PCRE_CONFIG=yes support to Makefile for using pcre-config to
2300 locate the relevant includes and libraries. Made this the default.
2302 PP/24 Fixed headers_only on smtp transports (was not sending trailing dot).
2303 Bugzilla 1246, report and most of solution from Tomasz Kusy.
2305 JH/03 ${eval } now uses 64-bit and supports a "g" suffix (like to "k" and "m").
2306 This may cause build issues on older platforms.
2308 PP/25 Revamped GnuTLS support, passing tls_require_ciphers to
2309 gnutls_priority_init, ignoring Exim options gnutls_require_kx,
2310 gnutls_require_mac & gnutls_require_protocols (no longer supported).
2311 Added SNI support via GnuTLS too.
2312 Made ${randint:..} supplier available, if using not-too-old GnuTLS.
2314 PP/26 Added EXPERIMENTAL_OCSP for OpenSSL.
2316 PP/27 Applied dnsdb SPF support patch from Janne Snabb.
2317 Applied second patch from Janne, implementing suggestion to default
2318 multiple-strings-in-record handling to match SPF spec.
2320 JH/04 Added expansion variable $tod_epoch_l for a higher-precision time.
2322 PP/28 Fix DCC dcc_header content corruption (stack memory referenced,
2323 read-only, out of scope).
2324 Patch from Wolfgang Breyha, report from Stuart Northfield.
2326 PP/29 Fix three issues highlighted by clang analyser static analysis.
2327 Only crash-plausible issue would require the Cambridge-specific
2328 iplookup router and a misconfiguration.
2329 Report from Marcin Mirosław.
2331 PP/30 Another attempt to deal with PCRE_PRERELEASE, this one less buggy.
2333 PP/31 %D in printf continues to cause issues (-Wformat=security), so for
2334 now guard some of the printf checks behind WANT_DEEPER_PRINTF_CHECKS.
2335 As part of this, removing so much warning spew let me fix some minor
2336 real issues in debug logging.
2338 PP/32 GnuTLS was always using default tls_require_ciphers, due to a missing
2339 assignment on my part. Fixed.
2341 PP/33 Added tls_dh_max_bits option, defaulting to current hard-coded limit
2342 of NSS, for GnuTLS/NSS interop. Problem root cause diagnosis by
2343 Janne Snabb (who went above and beyond: thank you).
2345 PP/34 Validate tls_require_ciphers on startup, since debugging an invalid
2346 string otherwise requires a connection and a bunch more work and it's
2347 relatively easy to get wrong. Should also expose TLS library linkage
2350 PP/35 Pull in <features.h> on Linux, for some portability edge-cases of
2351 64-bit ${eval} (JH/03).
2353 PP/36 Define _GNU_SOURCE in exim.h; it's needed for some releases of
2354 GNU libc to support some of the 64-bit stuff, should not lead to
2355 conflicts. Defined before os.h is pulled in, so if a given platform
2356 needs to override this, it can.
2358 PP/37 Unbreak Cyrus SASL auth: SSF retrieval was incorrect, Exim thought
2359 protection layer was required, which is not implemented.
2360 Bugzilla 1254, patch from Wolfgang Breyha.
2362 PP/38 Overhaul DH prime handling, supply RFC-specified DH primes as built
2363 into Exim, default to IKE id 23 from RFC 5114 (2048 bit). Make
2364 tls_dhparam take prime identifiers. Also unbreak combination of
2365 OpenSSL+DH_params+TLSSNI.
2367 PP/39 Disable SSLv2 by default in OpenSSL support.
2373 PP/01 Solaris build fix for Oracle's LDAP libraries.
2374 Bugzilla 1109, patch from Stephen Usher.
2376 TF/01 HP/UX build fix: avoid arithmetic on a void pointer.
2378 TK/01 DKIM Verification: Fix relaxed canon for empty headers w/o
2381 TF/02 Fix a couple more cases where we did not log the error message
2382 when unlink() failed. See also change 4.74-TF/03.
2384 TF/03 Make the exiwhat support code safe for signals. Previously Exim might
2385 lock up or crash if it happened to be inside a call to libc when it
2386 got a SIGUSR1 from exiwhat.
2388 The SIGUSR1 handler appends the current process status to the process
2389 log which is later printed by exiwhat. It used to use the general
2390 purpose logging code to do this, but several functions it calls are
2391 not safe for signals.
2393 The new output code in the SIGUSR1 handler is specific to the process
2394 log, and simple enough that it's easy to inspect for signal safety.
2395 Removing some special cases also simplifies the general logging code.
2396 Removing the spurious timestamps from the process log simplifies
2399 TF/04 Improved ratelimit ACL condition.
2401 The /noupdate option has been deprecated in favour of /readonly which
2402 has clearer semantics. The /leaky, /strict, and /readonly update modes
2403 are mutually exclusive. The update mode is no longer included in the
2404 database key; it just determines when the database is updated. (This
2405 means that when you upgrade Exim will forget old rate measurements.)
2407 Exim now checks that the per_* options are used with an update mode that
2408 makes sense for the current ACL. For example, when Exim is processing a
2409 message (e.g. acl_smtp_rcpt or acl_smtp_data, etc.) you can specify
2410 per_mail/leaky or per_mail/strict; otherwise (e.g. in acl_smtp_helo) you
2411 must specify per_mail/readonly. If you omit the update mode it defaults to
2412 /leaky where that makes sense (as before) or /readonly where required.
2414 The /noupdate option is now undocumented but still supported for
2415 backwards compatibility. It is equivalent to /readonly except that in
2416 ACLs where /readonly is required you may specify /leaky/noupdate or
2417 /strict/noupdate which are treated the same as /readonly.
2419 A useful new feature is the /count= option. This is a generalization
2420 of the per_byte option, so that you can measure the throughput of other
2421 aggregate values. For example, the per_byte option is now equivalent
2422 to per_mail/count=${if >{0}{$message_size} {0} {$message_size} }.
2424 The per_rcpt option has been generalized using the /count= mechanism
2425 (though it's more complicated than the per_byte equivalence). When it is
2426 used in acl_smtp_rcpt, the per_rcpt option adds recipients to the
2427 measured rate one at a time; if it is used later (e.g. in acl_smtp_data)
2428 or in a non-SMTP ACL it adds all the recipients in one go. (The latter
2429 /count=$recipients_count behaviour used to work only in non-SMTP ACLs.)
2430 Note that using per_rcpt with a non-readonly update mode in more than
2431 one ACL will cause the recipients to be double-counted. (The per_mail
2432 and per_byte options don't have this problem.)
2434 The handling of very low rates has changed slightly. If the computed rate
2435 is less than the event's count (usually one) then this event is the first
2436 after a long gap. In this case the rate is set to the same as this event's
2437 count, so that the first message of a spam run is counted properly.
2439 The major new feature is a mechanism for counting the rate of unique
2440 events. The new per_addr option counts the number of different
2441 recipients that someone has sent messages to in the last time period. It
2442 behaves like per_rcpt if all the recipient addresses are different, but
2443 duplicate recipient addresses do not increase the measured rate. Like
2444 the /count= option this is a general mechanism, so the per_addr option
2445 is equivalent to per_rcpt/unique=$local_part@$domain. You can, for
2446 example, measure the rate that a client uses different sender addresses
2447 with the options per_mail/unique=$sender_address. There are further
2448 details in the main documentation.
2450 TF/05 Removed obsolete $Cambridge$ CVS revision strings.
2452 TF/06 Removed a few PCRE remnants.
2454 TF/07 Automatically extract Exim's version number from tags in the git
2455 repository when doing development or release builds.
2457 PP/02 Raise smtp_cmd_buffer_size to 16kB.
2458 Bugzilla 879. Patch from Paul Fisher.
2460 PP/03 Implement SSL-on-connect outbound with protocol=smtps on smtp transport.
2461 Heavily based on revision 40f9a89a from Simon Arlott's tree.
2464 PP/04 Use .dylib instead of .so for dynamic library loading on MacOS.
2466 PP/05 Variable $av_failed, true if the AV scanner deferred.
2467 Bugzilla 1078. Patch from John Horne.
2469 PP/06 Stop make process more reliably on build failure.
2470 Bugzilla 1087. Patch from Heiko Schlittermann.
2472 PP/07 Make maildir_use_size_file an _expandable_ boolean.
2473 Bugzilla 1089. Patch from Heiko Schlittermann.
2475 PP/08 Handle ${run} returning more data than OS pipe buffer size.
2476 Bugzilla 1131. Patch from Holger Weiß.
2478 PP/09 Handle IPv6 addresses with SPF.
2479 Bugzilla 860. Patch from Wolfgang Breyha.
2481 PP/10 GnuTLS: support TLS 1.2 & 1.1.
2483 Use gnutls_certificate_verify_peers2() [patch from Andreas Metzler].
2486 PP/11 match_* no longer expand right-hand-side by default.
2487 New compile-time build option, EXPAND_LISTMATCH_RHS.
2488 New expansion conditions, "inlist", "inlisti".
2490 PP/12 fix uninitialised greeting string from PP/03 (smtps client support).
2492 PP/13 shell and compiler warnings fixes for RC1-RC4 changes.
2494 PP/14 fix log_write() format string regression from TF/03.
2495 Bugzilla 1152. Patch from Dmitry Isaikin.
2501 PP/01 The new ldap_require_cert option would segfault if used. Fixed.
2503 PP/02 Harmonised TLS library version reporting; only show if debugging.
2504 Layout now matches that introduced for other libraries in 4.74 PP/03.
2506 PP/03 New openssl_options items: no_sslv2 no_sslv3 no_ticket no_tlsv1
2508 PP/04 New "dns_use_edns0" global option.
2510 PP/05 Don't segfault on misconfiguration of ref:name exim-user as uid.
2513 PP/06 Extra paranoia around buffer usage at the STARTTLS transition.
2514 nb: Exim is not vulnerable to http://www.kb.cert.org/vuls/id/555316
2516 TK/01 Updated PolarSSL code to 0.14.2.
2517 Bugzilla 1097. Patch from Andreas Metzler.
2519 PP/07 Catch divide-by-zero in ${eval:...}.
2520 Fixes bugzilla 1102.
2522 PP/08 Condition negation of bool{}/bool_lax{} did not negate. Fixed.
2525 TK/02 Bugzilla 1106: CVE-2011-1764 - DKIM log line was subject to a
2526 format-string attack -- SECURITY: remote arbitrary code execution.
2528 TK/03 SECURITY - DKIM signature header parsing was double-expanded, second
2529 time unintentionally subject to list matching rules, letting the header
2530 cause arbitrary Exim lookups (of items which can occur in lists, *not*
2531 arbitrary string expansion). This allowed for information disclosure.
2533 PP/09 Fix another SIGFPE (x86) in ${eval:...} expansion, this time related to
2534 INT_MIN/-1 -- value coerced to INT_MAX.
2540 NM/01 Workaround for PCRE version dependency in version reporting
2543 TF/01 Update valgrind.h and memcheck.h to copies from valgrind-3.6.0.
2544 This fixes portability to compilers other than gcc, notably
2545 Solaris CC and HP-UX CC. Fixes Bugzilla 1050.
2547 TF/02 Bugzilla 139: Avoid using the += operator in the modular lookup
2548 makefiles for portability to HP-UX and POSIX correctness.
2550 PP/01 Permit LOOKUP_foo enabling on the make command-line.
2551 Also via indented variable definition in the Makefile.
2552 (Debugging by Oliver Heesakkers).
2554 PP/02 Restore caching of spamd results with expanded spamd_address.
2555 Patch from author of expandable spamd_address patch, Wolfgang Breyha.
2557 PP/03 Build issue: lookups-Makefile now exports LC_ALL=C
2558 Improves build reliability. Fix from: Frank Elsner
2560 NM/02 Fix wide character breakage in the rfc2047 coding
2561 Fixes bug 1064. Patch from Andrey N. Oktyabrski
2563 NM/03 Allow underscore in dnslist lookups
2564 Fixes bug 1026. Patch from Graeme Fowler
2566 PP/04 Bugzilla 230: Support TLS-enabled LDAP (in addition to ldaps).
2567 Code patches from Adam Ciarcinski of NetBSD.
2569 NM/04 Fixed exiqgrep to cope with mailq missing size issue
2572 PP/05 Bugzilla 1083: when lookup expansion defers, escape the output which
2573 is logged, to avoid truncation. Patch from John Horne.
2575 PP/06 Bugzilla 1042: implement freeze_signal on pipe transports.
2576 Patch from Jakob Hirsch.
2578 PP/07 Bugzilla 1061: restrict error messages sent over SMTP to not reveal
2579 SQL string expansion failure details.
2580 Patch from Andrey Oktyabrski.
2582 PP/08 Bugzilla 486: implement %M datestamping in log filenames.
2583 Patch from Simon Arlott.
2585 PP/09 New lookups functionality failed to compile on old gcc which rejects
2586 extern declarations in function scope.
2587 Patch from Oliver Fleischmann
2589 PP/10 Use sig_atomic_t for flags set from signal handlers.
2590 Check getgroups() return and improve debugging.
2591 Fixed developed for diagnosis in bug 927 (which turned out to be
2594 PP/11 Bugzilla 1055: Update $message_linecount for maildir_tag.
2595 Patch from Mark Zealey.
2597 PP/12 Bugzilla 1056: Improved spamd server selection.
2598 Patch from Mark Zealey.
2600 PP/13 Bugzilla 1086: Deal with maildir quota file races.
2601 Based on patch from Heiko Schlittermann.
2603 PP/14 Bugzilla 1019: DKIM multiple signature generation fix.
2604 Patch from Uwe Doering, sign-off by Michael Haardt.
2606 NM/05 Fix to spam.c to accommodate older gcc versions which dislike
2607 variable declaration deep within a block. Bug and patch from
2610 PP/15 lookups-Makefile IRIX compatibility coercion.
2612 PP/16 Make DISABLE_DKIM build knob functional.
2614 NM/06 Bugzilla 968: child_open_uid: restore default SIGPIPE handler
2615 Patch by Simon Arlott
2617 TF/03 Fix valgrind.h portability to C89 compilers that do not support
2618 variable argument macros. Our copy now differs from upstream.
2624 TF/01 Failure to get a lock on a hints database can have serious
2625 consequences so log it to the panic log.
2627 TF/02 Log LMTP confirmation messages in the same way as SMTP,
2628 controlled using the smtp_confirmation log selector.
2630 TF/03 Include the error message when we fail to unlink a spool file.
2632 DW/01 Bugzilla 139: Support dynamically loaded lookups as modules.
2633 With thanks to Steve Haslam, Johannes Berg & Serge Demonchaux
2634 for maintaining out-of-tree patches for some time.
2636 PP/01 Bugzilla 139: Documentation and portability issues.
2637 Avoid GNU Makefile-isms, let Exim continue to build on BSD.
2638 Handle per-OS dynamic-module compilation flags.
2640 PP/02 Let /dev/null have normal permissions.
2641 The 4.73 fixes were a little too stringent and complained about the
2642 permissions on /dev/null. Exempt it from some checks.
2643 Reported by Andreas M. Kirchwitz.
2645 PP/03 Report version information for many libraries, including
2646 Exim version information for dynamically loaded libraries. Created
2647 version.h, now support a version extension string for distributors
2648 who patch heavily. Dynamic module ABI change.
2650 PP/04 CVE-2011-0017 - check return value of setuid/setgid. This is a
2651 privilege escalation vulnerability whereby the Exim run-time user
2652 can cause root to append content of the attacker's choosing to
2655 PP/05 Bugzilla 1041: merged DCC maintainer's fixes for return code.
2658 PP/06 Bugzilla 1071: fix delivery logging with untrusted macros.
2659 If dropping privileges for untrusted macros, we disabled normal logging
2660 on the basis that it would fail; for the Exim run-time user, this is not
2661 the case, and it resulted in successful deliveries going unlogged.
2662 Fixed. Reported by Andreas Metzler.
2668 PP/01 Date: & Message-Id: revert to normally being appended to a message,
2669 only prepend for the Resent-* case. Fixes regression introduced in
2670 Exim 4.70 by NM/22 for Bugzilla 607.
2672 PP/02 Include check_rfc2047_length in configure.default because we're seeing
2673 increasing numbers of administrators be bitten by this.
2675 JJ/01 Added DISABLE_DKIM and comment to src/EDITME
2677 PP/03 Bugzilla 994: added openssl_options main configuration option.
2679 PP/04 Bugzilla 995: provide better SSL diagnostics on failed reads.
2681 PP/05 Bugzilla 834: provide a permit_coredump option for pipe transports.
2683 PP/06 Adjust NTLM authentication to handle SASL Initial Response.
2685 PP/07 If TLS negotiated an anonymous cipher, we could end up with SSL but
2686 without a peer certificate, leading to a segfault because of an
2687 assumption that peers always have certificates. Be a little more
2688 paranoid. Problem reported by Martin Tscholak.
2690 PP/08 Bugzilla 926: switch ClamAV to use the new zINSTREAM API for content
2691 filtering; old API available if built with WITH_OLD_CLAMAV_STREAM=yes
2692 NB: ClamAV planning to remove STREAM in "middle of 2010".
2693 CL also introduces -bmalware, various -d+acl logging additions and
2694 more caution in buffer sizes.
2696 PP/09 Implemented reverse_ip expansion operator.
2698 PP/10 Bugzilla 937: provide a "debug" ACL control.
2700 PP/11 Bugzilla 922: Documentation dusting, patch provided by John Horne.
2702 PP/12 Bugzilla 973: Implement --version.
2704 PP/13 Bugzilla 752: Refuse to build/run if Exim user is root/0.
2706 PP/14 Build without WITH_CONTENT_SCAN. Path from Andreas Metzler.
2708 PP/15 Bugzilla 816: support multiple condition rules on Routers.
2710 PP/16 Add bool_lax{} expansion operator and use that for combining multiple
2711 condition rules, instead of bool{}. Make both bool{} and bool_lax{}
2712 ignore trailing whitespace.
2714 JJ/02 prevent non-panic DKIM error from being sent to paniclog
2716 JJ/03 added tcp_wrappers_daemon_name to allow host entries other than
2719 PP/17 Fix malware regression for cmdline scanner introduced in PP/08.
2720 Notification from Dr Andrew Aitchison.
2722 PP/18 Change ClamAV response parsing to be more robust and to handle ClamAV's
2723 ExtendedDetectionInfo response format.
2724 Notification from John Horne.
2726 PP/19 OpenSSL 1.0.0a compatibility const-ness change, should be backwards
2729 PP/20 Added a CONTRIBUTING file. Fixed the documentation build to use http:
2730 XSL and documented dependency on system catalogs, with examples of how
2733 DW/21 Added Valgrind hooks in store.c to help it capture out-of-bounds store
2736 DW/22 Bugzilla 1044: CVE-2010-4345 - partial fix: restrict default behaviour
2737 of CONFIGURE_OWNER and CONFIGURE_GROUP options to no longer allow a
2738 configuration file which is writeable by the Exim user or group.
2740 DW/23 Bugzilla 1044: CVE-2010-4345 - part two: extend checks for writeability
2741 of configuration files to cover files specified with the -C option if
2742 they are going to be used with root privileges, not just the default
2745 DW/24 Bugzilla 1044: CVE-2010-4345 - part three: remove ALT_CONFIG_ROOT_ONLY
2746 option (effectively making it always true).
2748 DW/25 Add TRUSTED_CONFIG_PREFIX_FILE option to allow alternative configuration
2749 files to be used while preserving root privileges.
2751 DW/26 Set FD_CLOEXEC on SMTP sockets after forking in the daemon, to ensure
2752 that rogue child processes cannot use them.
2754 PP/27 Bugzilla 1047: change the default for system_filter_user to be the Exim
2755 run-time user, instead of root.
2757 PP/28 Add WHITELIST_D_MACROS option to let some macros be overridden by the
2758 Exim run-time user without dropping privileges.
2760 DW/29 Remove use of va_copy() which breaks pre-C99 systems. Duplicate the
2761 result string, instead of calling string_vformat() twice with the same
2764 DW/30 Allow TRUSTED_CONFIG_PREFIX_FILE only for Exim or CONFIGURE_OWNER, not
2765 for other users. Others should always drop root privileges if they use
2766 -C on the command line, even for a whitelisted configure file.
2768 DW/31 Turn TRUSTED_CONFIG_PREFIX_FILE into TRUSTED_CONFIG_FILE. No prefixes.
2770 NM/01 Fixed bug #1002 - Message loss when using multiple deliveries
2776 JJ/01 installed exipick 20100104.1, adding $max_received_linelength,
2777 $data_path, and $header_path variables; fixed documentation bugs and
2780 JJ/02 installed exipick 20100222.0, added --input-dir and --finput to allow
2781 exipick to access non-standard spools, including the "frozen" queue
2784 NM/01 Bugzilla 965: Support mysql stored procedures.
2785 Patch from Alain Williams
2787 NM/02 Bugzilla 961: Spacing fix (syntax error) on Makefile directives for NetBSD
2789 NM/03 Bugzilla 955: Documentation fix for max_rcpts.
2790 Patch from Andreas Metzler
2792 NM/04 Bugzilla 954: Fix for unknown responses from Dovecot authenticator.
2793 Patch from Kirill Miazine
2795 NM/05 Bugzilla 671: Added umask to procmail example.
2797 JJ/03 installed exipick 20100323.0, fixing doc bug
2799 NM/06 Bugzilla 988: CVE-2010-2023 - prevent hardlink attack on sticky mail
2800 directory. Notification and patch from Dan Rosenberg.
2802 TK/01 PDKIM: Upgrade PolarSSL files to upstream version 0.12.1.
2804 TK/02 Improve log output when DKIM signing operation fails.
2806 MH/01 Treat the transport option dkim_domain as a colon separated
2807 list, not as a single string, and sign the message with each element,
2808 omitting multiple occurences of the same signer.
2810 NM/07 Null terminate DKIM strings, Null initialise DKIM variable
2811 Bugzilla 985, 986. Patch by Simon Arlott
2813 NM/08 Bugzilla 967. dnsdb DNS TXT record bug fix (DKIM-related)
2814 Patch by Simon Arlott
2816 PP/01 Bugzilla 989: CVE-2010-2024 - work round race condition on
2817 MBX locking. Notification from Dan Rosenberg.
2823 TK/01 Bugzilla 912: Fix DKIM segfault on empty headers/body.
2825 NM/01 Bugzilla 913: Documentation fix for gnutls_* options.
2827 NM/02 Bugzilla 722: Documentation for randint. Better randomness defaults.
2829 NM/03 Bugzilla 847: Enable DNSDB lookup by default.
2831 NM/04 Bugzilla 915: Flag broken perl installation during build.
2837 TK/01 Added patch by Johannes Berg that expands the main option
2838 "spamd_address" if it starts with a dollar sign.
2840 TK/02 Write list of recipients to X-Envelope-Sender header when building
2841 the mbox-format spool file for content scanning (suggested by Jakob
2844 TK/03 Added patch by Wolfgang Breyha that adds experimental DCC
2845 (http://www.dcc-servers.net/) support via dccifd. Activated by
2846 setting EXPERIMENTAL_DCC=yes in Local/Makefile.
2848 TK/04 Bugzilla 673: Add f-protd malware scanner support. Patch submitted
2849 by Mark Daniel Reidel <mr@df.eu>.
2851 NM/01 Bugzilla 657: Embedded PCRE removed from the exim source tree.
2852 When building exim an external PCRE library is now needed -
2853 PCRE is a system library on the majority of modern systems.
2854 See entry on PCRE_LIBS in EDITME file.
2856 NM/02 Bugzilla 646: Removed unwanted C/R in Dovecot authenticator
2857 conversation. Added nologin parameter to request.
2858 Patch contributed by Kirill Miazine.
2860 TF/01 Do not log submission mode rewrites if they do not change the address.
2862 TF/02 Bugzilla 662: Fix stack corruption before exec() in daemon.c.
2864 NM/03 Bugzilla 602: exicyclog now handles panic log, and creates empty
2865 log files in place. Contributed by Roberto Lima.
2867 NM/04 Bugzilla 667: Close socket used by dovecot authenticator.
2869 TF/03 Bugzilla 615: When checking the local_parts router precondition
2870 after a local_part_suffix or local_part_prefix option, Exim now
2871 does not use the address's named list lookup cache, since this
2872 contains cached lookups for the whole local part.
2874 NM/05 Bugzilla 521: Integrated SPF Best Guess support contributed by
2875 Robert Millan. Documentation is in experimental-spec.txt.
2877 TF/04 Bugzilla 668: Fix parallel build (make -j).
2879 NM/05.2 Bugzilla 437: Prevent Maildir aux files being created with mode 000.
2881 NM/05.3 Bugzilla 598: Improvement to Dovecot authenticator handling.
2882 Patch provided by Jan Srzednicki.
2884 TF/05 Leading white space used to be stripped from $spam_report which
2885 wrecked the formatting. Now it is preserved.
2887 TF/06 Save $spam_score, $spam_bar, and $spam_report in spool files, so
2888 that they are available at delivery time.
2890 TF/07 Fix the way ${extract is skipped in the untaken branch of a conditional.
2892 TF/08 TLS error reporting now respects the incoming_interface and
2893 incoming_port log selectors.
2895 TF/09 Produce a more useful error message if an SMTP transport's hosts
2896 setting expands to an empty string.
2898 NM/06 Bugzilla 744: EXPN did not work under TLS.
2899 Patch provided by Phil Pennock.
2901 NM/07 Bugzilla 769: Extraneous comma in usage fprintf
2902 Patch provided by Richard Godbee.
2904 NM/08 Fixed erroneous documentation references to smtp_notquit_acl to be
2905 acl_smtp_notquit, added index entry.
2907 NM/09 Bugzilla 787: Potential buffer overflow in string_format.
2908 Patch provided by Eugene Bujak.
2910 NM/10 Bugzilla 770: Problem on some platforms modifying the len parameter to
2911 accept(). Patch provided by Maxim Dounin.
2913 NM/11 Bugzilla 749: Preserve old behaviour of blanks comparing equal to zero.
2914 Patch provided by Phil Pennock.
2916 NM/12 Bugzilla 497: Correct behaviour of exiwhat when no config exists.
2918 NM/13 Bugzilla 590: Correct handling of Resent-Date headers.
2919 Patch provided by Brad "anomie" Jorsch.
2921 NM/14 Bugzilla 622: Added timeout setting to transport filter.
2922 Patch provided by Dean Brooks.
2924 TK/05 Add native DKIM support (does not depend on external libraries).
2926 NM/15 Bugzilla 854: Removed code that symlinks to pcre as its no longer useful.
2927 Patch provided by Graeme Fowler.
2929 NM/16 Bugzilla 851: Documentation example syntax fix.
2931 NM/17 Changed NOTICE file to remove references to embedded PCRE.
2933 NM/18 Bugzilla 894: Fix issue with very long lines including comments in
2936 NM/19 Bugzilla 745: TLS version reporting.
2937 Patch provided by Phil Pennock.
2939 NM/20 Bugzilla 167: bool: condition support.
2940 Patch provided by Phil Pennock.
2942 NM/21 Bugzilla 665: gnutls_compat_mode to allow compatibility with broken
2943 clients. Patch provided by Phil Pennock.
2945 NM/22 Bugzilla 607: prepend (not append) Resent-Message-ID and Resent-Date.
2946 Patch provided by Brad "anomie" Jorsch.
2948 NM/23 Bugzilla 687: Fix misparses in eximstats.
2949 Patch provided by Heiko Schlittermann.
2951 NM/24 Bugzilla 688: Fix exiwhat to handle log_selector = +pid.
2952 Patch provided by Heiko Schlittermann.
2954 NM/25 Bugzilla 727: Use transport mode as default mode for maildirsize file.
2955 plus update to original patch.
2957 NM/26 Bugzilla 799: Documentation correction for ratelimit.
2959 NM/27 Bugzilla 802: Improvements to local interface IP addr detection.
2960 Patch provided by David Brownlee.
2962 NM/28 Bugzilla 807: Improvements to LMTP delivery logging.
2964 NM/29 Bugzilla 862, 866, 875: Documentation bugfixes.
2966 NM/30 Bugzilla 888: TLS documentation bugfixes.
2968 NM/31 Bugzilla 896: Dovecot buffer overrun fix.
2970 NM/32 Bugzilla 889: Change all instances of "expr" in shell scripts to "expr --"
2971 Unlike the original bugzilla I have changed all shell scripts in src tree.
2973 NM/33 Bugzilla 898: Transport filter timeout fix.
2974 Patch by Todd Rinaldo.
2976 NM/34 Bugzilla 901: Fix sign/unsigned and UTF mismatches.
2977 Patch by Serge Demonchaux.
2979 NM/35 Bugzilla 39: Base64 decode bug fixes.
2980 Patch by Jakob Hirsch.
2982 NM/36 Bugzilla 909: Correct connect() call in dcc code.
2984 NM/37 Bugzilla 910: Correct issue with relaxed/simple handling.
2986 NM/38 Bugzilla 908: Removed NetBSD3 support as no longer needed.
2988 NM/39 Bugzilla 911: Fixed MakeLinks build script.
2994 TK/01 Add preliminary DKIM support. Currently requires a forked version of
2995 ALT-N's libdkim that I have put here:
2996 http://duncanthrax.net/exim-experimental/
2998 Note to Michael Haardt: I had to rename some vars in sieve.c. They
2999 were called 'true' and it seems that C99 defines that as a reserved
3000 keyword to be used with 'bool' variable types. That means you could
3001 not include C99-style headers which use bools without triggering
3002 build errors in sieve.c.
3004 NM/01 Bugzilla 592: --help option is handled incorrectly if exim is invoked
3005 as mailq or other aliases. Changed the --help handling significantly
3006 to do whats expected. exim_usage() emits usage/help information.
3008 SC/01 Added the -bylocaldomain option to eximstats.
3010 NM/02 Bugzilla 619: Defended against bad data coming back from gethostbyaddr.
3012 NM/03 Bugzilla 613: Documentation fix for acl_not_smtp.
3014 NM/04 Bugzilla 628: PCRE update to 7.4 (work done by John Hall).
3020 PH/01 Another patch from the Sieve maintainer.
3022 PH/02 When an IPv6 address is converted to a string for single-key lookup
3023 in an address list (e.g. for an item such as "net24-dbm;/net/works"),
3024 dots are used instead of colons so that keys in lsearch files need not
3025 contain colons. This was done some time before quoting was made available
3026 in lsearch files. However, iplsearch files do require colons in IPv6 keys
3027 (notated using the quote facility) so as to distinguish them from IPv4
3028 keys. This meant that lookups for IP addresses in host lists did not work
3029 for iplsearch lookups.
3031 This has been fixed by arranging for IPv6 addresses to be expressed with
3032 colons if the lookup type is iplsearch. This is not incompatible, because
3033 previously such lookups could never work.
3035 The situation is now rather anomalous, since one *can* have colons in
3036 ordinary lsearch keys. However, making the change in all cases is
3037 incompatible and would probably break a number of configurations.
3039 TK/01 Change PRVS address formatting scheme to reflect latests BATV draft
3042 MH/01 The "spam" ACL condition code contained a sscanf() call with a %s
3043 conversion specification without a maximum field width, thereby enabling
3044 a rogue spamd server to cause a buffer overflow. While nobody in their
3045 right mind would setup Exim to query an untrusted spamd server, an
3046 attacker that gains access to a server running spamd could potentially
3047 exploit this vulnerability to run arbitrary code as the Exim user.
3049 TK/02 Bugzilla 502: Apply patch to make the SPF-Received: header use
3050 $primary_hostname instead of what libspf2 thinks the hosts name is.
3052 MH/02 The dsearch lookup now uses lstat(2) instead of stat(2) to look for
3053 a directory entry by the name of the lookup key. Previously, if a
3054 symlink pointed to a non-existing file or a file in a directory that
3055 Exim lacked permissions to read, a lookup for a key matching that
3056 symlink would fail. Now it is enough that a matching directory entry
3057 exists, symlink or not. (Bugzilla 503.)
3059 PH/03 The body_linecount and body_zerocount variables are now exported in the
3062 PH/04 Added the $dnslist_matched variable.
3064 PH/05 Unset $tls_cipher and $tls_peerdn before making a connection as a client.
3065 This means they are set thereafter only if the connection becomes
3068 PH/06 Added the client_condition to authenticators so that some can be skipped
3069 by clients under certain conditions.
3071 PH/07 The error message for a badly-placed control=no_multiline_responses left
3072 "_responses" off the end of the name.
3074 PH/08 Added -Mvc to output a copy of a message in RFC 2822 format.
3076 PH/09 Tidied the code for creating ratelimiting keys, creating them explicitly
3077 (without spaces) instead of just copying the configuration text.
3079 PH/10 Added the /noupdate option to the ratelimit ACL condition.
3081 PH/11 Added $max_received_linelength.
3083 PH/12 Added +ignore_defer and +include_defer to host lists.
3085 PH/13 Installed PCRE version 7.2. This needed some changes because of the new
3086 way in which PCRE > 7.0 is built.
3088 PH/14 Implemented queue_only_load_latch.
3090 PH/15 Removed an incorrect (int) cast when reading the value of SIZE in a
3091 MAIL command. The effect was to mangle the value on 64-bit systems.
3093 PH/16 Another patch from the Sieve maintainer.
3095 PH/17 Added the NOTQUIT ACL, based on a patch from Ted Cooper.
3097 PH/18 If a system quota error occurred while trying to create the file for
3098 a maildir delivery, the message "Mailbox is full" was not appended to the
3099 bounce if the delivery eventually timed out. Change 4.67/27 below applied
3100 only to a quota excession during the actual writing of the file.
3102 PH/19 It seems that peer DN values may contain newlines (and other non-printing
3103 characters?) which causes problems in log lines. The DN values are now
3104 passed through string_printing() before being added to log lines.
3106 PH/20 Added the "servers=" facility to MySQL and PostgreSQL lookups. (Oracle
3107 and InterBase are left for another time.)
3109 PH/21 Added message_body_newlines option.
3111 PH/22 Guard against possible overflow in moan_check_errorcopy().
3113 PH/23 POSIX allows open() to be a macro; guard against that.
3115 PH/24 If the recipient of an error message contained an @ in the local part
3116 (suitably quoted, of course), incorrect values were put in $domain and
3117 $local_part during the evaluation of errors_copy.
3123 MH/01 Fix for bug #448, segfault in Dovecot authenticator when interface_address
3124 is unset (happens when testing with -bh and -oMi isn't used). Thanks to
3127 PH/01 Added a new log selector smtp_no_mail, to log SMTP sessions that do not
3128 issue a MAIL command.
3130 PH/02 In an ACL statement such as
3132 deny dnslists = X!=127.0.0.2 : X=127.0.0.2
3134 if a client was not listed at all, or was listed with a value other than
3135 127.0.0.2, in the X list, but was listed with 127.0.0.2 in the Y list,
3136 the condition was not true (as it should be), so access was not denied.
3137 The bug was that the ! inversion was incorrectly passed on to the second
3138 item. This has been fixed.
3140 PH/03 Added additional dnslists conditions == and =& which are different from
3141 = and & when the dns lookup returns more than one IP address.
3143 PH/04 Added gnutls_require_{kx,mac,protocols} to give more control over the
3144 cipher suites used by GnuTLS. These options are ignored by OpenSSL.
3146 PH/05 After discussion on the list, added a compile time option ENABLE_DISABLE_
3147 FSYNC, which compiles an option called disable_fsync that allows for
3148 bypassing fsync(). The documentation is heavily laced with warnings.
3150 SC/01 Updated eximstats to collate all SpamAssassin rejects into one bucket.
3152 PH/06 Some tidies to the infrastructure of the Test Suite that is concerned
3153 with the auxiliary C programs that it uses: (1) Arrange for BIND_8_COMPAT
3154 to be defined when compiling on OSX (Darwin); (2) Tidies to the Makefile,
3155 including adding "make clean"; (3) Added -fPIC when compiling the test
3156 dynamically loaded module, to get rid of a warning.
3158 MH/02 Fix for bug #451, causing paniclog entries to be written if a bounce
3159 message fails, move_frozen_messages = true and ignore_bounce_errors_after
3160 = 0s. The bug is otherwise harmless.
3162 PH/07 There was a bug in the dovecot authenticator such that the value of
3163 $auth1 could be overwritten, and so not correctly preserved, after a
3164 successful authentication. This usually meant that the value preserved by
3165 the server_setid option was incorrect.
3167 PH/08 Added $smtp_count_at_connection_start, deliberately with a long name.
3169 PH/09 Installed PCRE release 7.0.
3171 PH/10 The acl_not_smtp_start ACL was, contrary to the documentation, not being
3172 run for batched SMTP input. It is now run at the start of every message
3173 in the batch. While fixing this I discovered that the process information
3174 (output by running exiwhat) was not always getting set for -bs and -bS
3175 input. This is fixed, and it now also says "batched" for BSMTP.
3177 PH/11 Added control=no_pipelining.
3179 PH/12 Added $sending_ip_address and $sending_port (mostly Magnus Holmgren's
3180 patch, slightly modified), and move the expansion of helo_data till after
3181 the connection is made in the smtp transport (so it can use these
3184 PH/13 Added ${rfc2047d: to decoded RFC 2047 strings.
3186 PH/14 Added log_selector = +pid.
3188 PH/15 Flush SMTP output before delaying, unless control=no_delay_flush is set.
3190 PH/16 Add ${if forany and ${if forall.
3192 PH/17 Added dsn_from option to vary the From: line in DSNs.
3194 PH/18 Flush SMTP output before performing a callout, unless control =
3195 no_callout_flush is set.
3197 PH/19 Change 4.64/PH/36 introduced a bug: when address_retry_include_sender
3198 was true (the default) a successful delivery failed to delete the retry
3199 item, thus causing premature timeout of the address. The bug is now
3202 PH/20 Added hosts_avoid_pipelining to the smtp transport.
3204 PH/21 Long custom messages for fakedefer and fakereject are now split up
3205 into multiline responses in the same way that messages for "deny" and
3206 other ACL rejections are.
3208 PH/22 Applied Jori Hamalainen's speed-up changes and typo fixes to exigrep,
3209 with slight modification.
3211 PH/23 Applied sieve patches from the maintainer "tracking the latest notify
3212 draft, changing the syntax and factoring some duplicate code".
3214 PH/24 When the log selector "outgoing_port" was set, the port was shown as -1
3215 for deliveries of the second and subsequent messages over the same SMTP
3218 PH/25 Applied Magnus Holmgren's patch for ${addresses, ${map, ${filter, and
3219 ${reduce, with only minor "tidies".
3221 SC/02 Applied Daniel Tiefnig's patch to improve the '($parent) =' pattern match.
3223 PH/26 Added a "continue" ACL modifier that does nothing, for the benefit of its
3224 expansion side effects.
3226 PH/27 When a message times out after an over-quota error from an Exim-imposed
3227 quota, the bounce message says "mailbox is full". This message was not
3228 being given when it was a system quota that was exceeded. It now should
3231 MH/03 Made $recipients available in local_scan(). local_scan() already has
3232 better access to the recipient list through recipients_list[], but
3233 $recipients can be useful in postmaster-provided expansion strings.
3235 PH/28 The $smtp_command and $smtp_command_argument variables were not correct
3236 in the case of a MAIL command with additional options following the
3237 address, for example: MAIL FROM:<foo@bar> SIZE=1234. The option settings
3238 were accidentally chopped off.
3240 PH/29 SMTP synchronization checks are implemented when a command is read -
3241 there is a check that no more input is waiting when there shouldn't be
3242 any. However, for some commands, a delay in an ACL can mean that it is
3243 some time before the response is written. In this time, more input might
3244 arrive, invalidly. So now there are extra checks after an ACL has run for
3245 HELO/EHLO and after the predata ACL, and likewise for MAIL and RCPT when
3246 pipelining has not been advertised.
3248 PH/30 MH's patch to allow iscntrl() characters to be list separators.
3250 PH/31 Unlike :fail:, a custom message specified with :defer: was not being
3251 returned in the SMTP response when smtp_return_error_details was false.
3252 This has been fixed.
3254 PH/32 Change the Dovecot authenticator to use read() and write() on the socket
3255 instead of the C I/O that was originally supplied, because problems were
3256 reported on Solaris.
3258 PH/33 Compile failed with OpenSSL 0.9.8e. This was due to a coding error in
3259 Exim which did not show up earlier: it was assuming that a call to
3260 SSL_CTX_set_info_callback() might give an error value. In fact, there is
3261 no error. In previous releases of OpenSSL, SSL_CTX_set_info_callback()
3262 was a macro that became an assignment, so it seemed to work. This has
3263 changed to a proper function call with a void return, hence the compile
3264 error. Exim's code has been fixed.
3266 PH/34 Change HDA_SIZE in oracle.c from 256 to 512. This is needed for 64-bit
3269 PH/35 Applied a patch from the Sieve maintainer which fixes a bug in "notify".
3271 PH/36 Applied John Jetmore's patch to add -v functionality to exigrep.
3273 PH/37 If a message is not accepted after it has had an id assigned (e.g.
3274 because it turns out to be too big or there is a timeout) there is no
3275 "Completed" line in the log. When some messages of this type were
3276 selected by exigrep, they were listed as "not completed". Others were
3277 picked up by some special patterns. I have improved the selection
3278 criteria to be more general.
3280 PH/38 The host_find_failed option in the manualroute router can now be set
3281 to "ignore", to completely ignore a host whose IP address cannot be
3282 found. If all hosts are ignored, the behaviour is controlled by the new
3283 host_all_ignored option.
3285 PH/39 In a list of hosts for manualroute, if one item (either because of multi-
3286 homing or because of multiple MX records with /mx) generated more than
3287 one IP address, and the following item turned out to be the local host,
3288 all the secondary addresses of the first item were incorrectly removed
3289 from the list, along with the local host and any following hosts (which
3290 is what is supposed to happen).
3292 PH/40 When Exim receives a message, it writes the login name, uid, and gid of
3293 whoever called Exim into the -H file. In the case of the daemon it was
3294 behaving confusingly. When first started, it used values for whoever
3295 started the daemon, but after a SIGHUP it used the Exim user (because it
3296 calls itself on a restart). I have changed the code so that it now always
3299 PH/41 (Following a suggestion from Tony Finch) If all the RCPT commands in a
3300 message are rejected with the same error (e.g. no authentication or bad
3301 sender address), and a DATA command is nevertheless sent (as can happen
3302 with PIPELINING or a stupid MUA), the error message that was given to the
3303 RCPT commands is included in the rejection of the DATA command. This is
3304 intended to be helpful for MUAs that show only the final error to their
3307 PH/42 Another patch from the Sieve maintainer.
3309 SC/02 Eximstats - Differentiate between permanent and temporary rejects.
3310 Eximstats - Fixed some broken HTML links and added missing column headers
3312 Eximstats - Fixed Grand Total Summary Domains, Edomains, and Email
3313 columns for Rejects, Temp Rejects, Ham, and Spam rows.
3315 SC/03 Eximstats - V1.58 Fix to get <> and blackhole to show in edomain tables.
3317 PH/43 Yet another patch from the Sieve maintainer.
3319 PH/44 I found a way to check for a TCP/IP connection going away before sending
3320 the response to the final '.' that terminates a message, but only in the
3321 case where the client has not sent further data following the '.'
3322 (unfortunately, this is allowed). However, in many cases there won't be
3323 any further data because there won't be any more messages to send. A call
3324 to select() can be used: if it shows that the input is "ready", there is
3325 either input waiting, or the socket has been closed. An attempt to read
3326 the next input character can distinguish the two cases. Previously, Exim
3327 would have sent an OK response which the client would never have see.
3328 This could lead to message repetition. This fix should cure that, at
3329 least in a lot of common cases.
3331 PH/45 Do not advertise STARTTLS in response to HELP unless it would be
3332 advertised in response to EHLO.
3338 PH/01 Two more bugs that were introduced by 4.64/PH/07, in addition to the one
3339 fixed by 4.65/MH/01 (is this a record?) are fixed:
3341 (i) An empty string was always treated as zero by the numeric comparison
3342 operators. This behaviour has been restored.
3344 (ii) It is documented that the numeric comparison operators always treat
3345 their arguments as decimal numbers. This was broken in that numbers
3346 starting with 0 were being interpreted as octal.
3348 While fixing these problems I realized that there was another issue that
3349 hadn't been noticed. Values of message_size_limit (both the global option
3350 and the transport option) were treated as octal if they started with 0.
3351 The documentation was vague. These values are now always treated as
3352 decimal, and I will make that clear in the documentation.
3358 TK/01 Disable default definition of HAVE_LINUX_SENDFILE. Clashes with
3359 Linux large file support (_FILE_OFFSET_BITS=64) on older glibc
3362 MH/01 Don't check that the operands of numeric comparison operators are
3363 integers when their expansion is in "skipping" mode (fixes bug
3364 introduced by 4.64-PH/07).
3366 PH/01 If a system filter or a router generates more than SHRT_MAX (32767)
3367 child addresses, Exim now panics and dies. Previously, because the count
3368 is held in a short int, deliveries were likely to be lost. As such a
3369 large number of recipients for a single message is ridiculous
3370 (performance will be very, very poor), I have chosen to impose a limit
3371 rather than extend the field.
3377 TK/01 Bugzilla #401. Fix DK spooling code so that it can overwrite a
3378 leftover -K file (the existence of which was triggered by #402).
3379 While we were at it, introduced process PID as part of the -K
3380 filename. This should rule out race conditions when creating
3383 TK/02 Bugzilla #402. Apply patch from Simon Arlott, speeding up DK signing
3384 processing considerably. Previous code took too long for large mails,
3385 triggering a timeout which in turn triggers #401.
3387 TK/03 Introduced HAVE_LINUX_SENDFILE to os.h-Linux. Currently only used
3388 in the DK code in transports.c. sendfile() is not really portable,
3389 hence the _LINUX specificness.
3391 TF/01 In the add_headers option to the mail command in an Exim filter,
3392 there was a bug that Exim would claim a syntax error in any
3393 header after the first one which had an odd number of characters
3396 PH/01 If a server that rejects MAIL FROM:<> was the target of a sender
3397 callout verification, Exim cached a "reject" for the entire domain. This
3398 is correct for most verifications, but it is not correct for a recipient
3399 verification with use_sender or use_postmaster set, because in that case
3400 the callout does not use MAIL FROM:<>. Exim now distinguishes the special
3401 case of MAIL FROM:<> rejection from other early rejections (e.g.
3402 rejection of HELO). When verifying a recipient using a non-null MAIL
3403 address, the cache is ignored if it shows MAIL FROM:<> rejection.
3404 Whatever the result of the callout, the value of the domain cache is
3405 left unchanged (for any other kind of callout, getting as far as trying
3406 RCPT means that the domain itself is ok).
3408 PH/02 Tidied a number of unused variable and signed/unsigned warnings that
3411 PH/03 On Solaris, an unexpectedly close socket (dropped connection) can
3412 manifest itself as EPIPE rather than ECONNECT. When tidying away a
3413 session, the daemon ignores ECONNECT errors and logs others; it now
3414 ignores EPIPE as well.
3416 PH/04 Applied Nico Erfurth's refactoring patch to tidy up mime.c
3417 (quoted-printable decoding).
3419 PH/05 Applied Nico Erfurth's refactoring patch to tidy up spool_mbox.c, and
3420 later the small subsequent patch to fix an introduced bug.
3422 PH/06 Installed the latest Cygwin Makefile from the Cygwin maintainer.
3424 PH/07 There was no check for overflow in expansions such as ${if >{1}{4096M}}.
3426 PH/08 An error is now given if message_size_limit is specified negative.
3428 PH/09 Applied and tidied up Jakob Hirsch's patch for allowing ACL variables
3429 to be given (somewhat) arbitrary names.
3431 JJ/01 exipick 20060919.0, allow for arbitrary acl_ variables introduced
3434 JJ/02 exipick 20060919.0, --show-vars args can now be regular expressions,
3435 miscellaneous code fixes
3437 PH/10 Added the log_reject_target ACL modifier to specify where to log
3440 PH/11 Callouts were setting the name used for EHLO/HELO from $smtp_active_
3441 hostname. This is wrong, because it relates to the incoming message (and
3442 probably the interface on which it is arriving) and not to the outgoing
3443 callout (which could be using a different interface). This has been
3444 changed to use the value of the helo_data option from the smtp transport
3445 instead - this is what is used when a message is actually being sent. If
3446 there is no remote transport (possible with a router that sets up host
3447 addresses), $smtp_active_hostname is used.
3449 PH/12 Installed Andrey Panin's patch to add a dovecot authenticator. Various
3450 tweaks were necessary in order to get it to work (see also 21 below):
3451 (a) The code assumed that strncpy() returns a negative number on buffer
3452 overflow, which isn't the case. Replaced with Exim's string_format()
3454 (b) There were several signed/unsigned issues. I just did the minimum
3455 hacking in of casts. There is scope for a larger refactoring.
3456 (c) The code used strcasecmp() which is not a standard C function.
3457 Replaced with Exim's strcmpic() function.
3458 (d) The code set only $1; it now sets $auth1 as well.
3459 (e) A simple test gave the error "authentication client didn't specify
3460 service in request". It would seem that Dovecot has changed its
3461 interface. Fortunately there's a specification; I followed it and
3462 changed what the client sends and it appears to be working now.
3464 PH/13 Added $message_headers_raw to provide the headers without RFC 2047
3467 PH/14 Corrected misleading output from -bv when -v was also used. Suppose the
3468 address A is aliased to B and C, where B exists and C does not. Without
3469 -v the output is "A verified" because verification stops after a
3470 successful redirection if more than one address is generated. However,
3471 with -v the child addresses are also verified. Exim was outputting "A
3472 failed to verify" and then showing the successful verification for C,
3473 with its parentage. It now outputs "B failed to verify", showing B's
3474 parentage before showing the successful verification of C.
3476 PH/15 Applied Michael Deutschmann's patch to allow DNS black list processing to
3477 look up a TXT record in a specific list after matching in a combined
3480 PH/16 It seems that the options setting for the resolver (RES_DEFNAMES and
3481 RES_DNSRCH) can affect the behaviour of gethostbyname() and friends when
3482 they consult the DNS. I had assumed they would set it the way they
3483 wanted; and indeed my experiments on Linux seem to show that in some
3484 cases they do (I could influence IPv6 lookups but not IPv4 lookups).
3485 To be on the safe side, however, I have now made the interface to
3486 host_find_byname() similar to host_find_bydns(), with an argument
3487 containing the DNS resolver options. The host_find_byname() function now
3488 sets these options at its start, just as host_find_bydns() does. The smtp
3489 transport options dns_qualify_single and dns_search_parents are passed to
3490 host_find_byname() when gethostbyname=TRUE in this transport. Other uses
3491 of host_find_byname() use the default settings of RES_DEFNAMES
3492 (qualify_single) but not RES_DNSRCH (search_parents).
3494 PH/17 Applied (a modified version of) Nico Erfurth's patch to make
3495 spool_read_header() do less string testing, by means of a preliminary
3496 switch on the second character of optional "-foo" lines. (This is
3497 overdue, caused by the large number of possibilities that now exist.
3498 Originally there were few.) While I was there, I also converted the
3499 str(n)cmp tests so they don't re-test the leading "-" and the first
3500 character, in the hope this might squeeze out yet more improvement.
3502 PH/18 Two problems with "group" syntax in header lines when verifying: (1) The
3503 flag allowing group syntax was set by the header_syntax check but not
3504 turned off, possible causing trouble later; (2) The flag was not being
3505 set at all for the header_verify test, causing "group"-style headers to
3506 be rejected. I have now set it in this case, and also caused header_
3507 verify to ignore an empty address taken from a group. While doing this, I
3508 came across some other cases where the code for allowing group syntax
3509 while scanning a header line wasn't quite right (mostly, not resetting
3510 the flag correctly in the right place). These bugs could have caused
3511 trouble for malformed header lines. I hope it is now all correct.
3513 PH/19 The functions {pwcheck,saslauthd}_verify_password() are always called
3514 with the "reply" argument non-NULL. The code, however (which originally
3515 came from elsewhere) had *some* tests for NULL when it wrote to *reply,
3516 but it didn't always do it. This confused somebody who was copying the
3517 code for some other use. I have removed all the tests.
3519 PH/20 It was discovered that the GnuTLS code had support for RSA_EXPORT, a
3520 feature that was used to support insecure browsers during the U.S. crypto
3521 embargo. It requires special client support, and Exim is probably the
3522 only MTA that supported it -- and would never use it because real RSA is
3523 always available. This code has been removed, because it had the bad
3524 effect of slowing Exim down by computing (never used) parameters for the
3525 RSA_EXPORT functionality.
3527 PH/21 On the advice of Timo Sirainen, added a check to the dovecot
3528 authenticator to fail if there's a tab character in the incoming data
3529 (there should never be unless someone is messing about, as it's supposed
3530 to be base64-encoded). Also added, on Timo's advice, the "secured" option
3531 if the connection is using TLS or if the remote IP is the same as the
3532 local IP, and the "valid-client-cert option" if a client certificate has
3535 PH/22 As suggested by Dennis Davis, added a server_condition option to *all*
3536 authenticators. This can be used for authorization after authentication
3537 succeeds. (In the case of plaintext, it servers for both authentication
3540 PH/23 Testing for tls_required and lost_connection in a retry rule didn't work
3541 if any retry times were supplied.
3543 PH/24 Exim crashed if verify=helo was activated during an incoming -bs
3544 connection, where there is no client IP address to check. In this
3545 situation, the verify now always succeeds.
3547 PH/25 Applied John Jetmore's -Mset patch.
3549 PH/26 Added -bem to be like -Mset, but loading a message from a file.
3551 PH/27 In a string expansion for a processed (not raw) header when multiple
3552 headers of the same name were present, leading whitespace was being
3553 removed from all of them, but trailing whitespace was being removed only
3554 from the last one. Now trailing whitespace is removed from each header
3555 before concatenation. Completely empty headers in a concatenation (as
3556 before) are ignored.
3558 PH/28 Fixed bug in backwards-compatibility feature of PH/09 (thanks to John
3559 Jetmore). It would have mis-read ACL variables from pre-4.61 spool files.
3561 PH/29 [Removed. This was a change that I later backed out, and forgot to
3562 correct the ChangeLog entry (that I had efficiently created) before
3563 committing the later change.]
3565 PH/30 Exim was sometimes attempting to deliver messages that had suffered
3566 address errors (4xx response to RCPT) over the same connection as other
3567 messages routed to the same hosts. Such deliveries are always "forced",
3568 so retry times are not inspected. This resulted in far too many retries
3569 for the affected addresses. The effect occurred only when there were more
3570 hosts than the hosts_max_try setting in the smtp transport when it had
3571 the 4xx errors. Those hosts that it had tried were not added to the list
3572 of hosts for which the message was waiting, so if all were tried, there
3573 was no problem. Two fixes have been applied:
3575 (i) If there are any address or message errors in an SMTP delivery, none
3576 of the hosts (tried or untried) are now added to the list of hosts
3577 for which the message is waiting, so the message should not be a
3578 candidate for sending over the same connection that was used for a
3579 successful delivery of some other message. This seems entirely
3580 reasonable: after all the message is NOT "waiting for some host".
3581 This is so "obvious" that I'm not sure why it wasn't done
3582 previously. Hope I haven't missed anything, but it can't do any
3583 harm, as the worst effect is to miss an optimization.
3585 (ii) If, despite (i), such a delivery is accidentally attempted, the
3586 routing retry time is respected, so at least it doesn't keep
3587 hammering the server.
3589 PH/31 Installed Andrew Findlay's patch to close the writing end of the socket
3590 in ${readsocket because some servers need this prod.
3592 PH/32 Added some extra debug output when updating a wait-xxx database.
3594 PH/33 The hint "could be header name not terminated by colon", which has been
3595 given for certain expansion errors for a long time, was not being given
3596 for the ${if def:h_colon_omitted{... case.
3598 PH/34 The spec says: "With one important exception, whenever a domain list is
3599 being scanned, $domain contains the subject domain." There was at least
3600 one case where this was not true.
3602 PH/35 The error "getsockname() failed: connection reset by peer" was being
3603 written to the panic log as well as the main log, but it isn't really
3604 panic-worthy as it just means the connection died rather early on. I have
3605 removed the panic log writing for the ECONNRESET error when getsockname()
3608 PH/36 After a 4xx response to a RCPT error, that address was delayed (in queue
3609 runs only) independently of the message's sender address. This meant
3610 that, if the 4xx error was in fact related to the sender, a different
3611 message to the same recipient with a different sender could confuse
3612 things. In particular, this can happen when sending to a greylisting
3613 server, but other circumstances could also provoke similar problems.
3614 I have changed the default so that the retry time for these errors is now
3615 based a combination of the sender and recipient addresses. This change
3616 can be overridden by setting address_retry_include_sender=false in the
3619 PH/37 For LMTP over TCP/IP (the smtp transport), error responses from the
3620 remote server are returned as part of bounce messages. This was not
3621 happening for LMTP over a pipe (the lmtp transport), but now it is the
3622 same for both kinds of LMTP.
3624 PH/38 Despite being documented as not happening, Exim was rewriting addresses
3625 in header lines that were in fact CNAMEs. This is no longer the case.
3627 PH/39 If -R or -S was given with -q<time>, the effect of -R or -S was ignored,
3628 and queue runs started by the daemon processed all messages. This has
3629 been fixed so that -R and -S can now usefully be given with -q<time>.
3631 PH/40 Import PCRE release 6.7 (fixes some bugs).
3633 PH/41 Add bitwise logical operations to eval (courtesy Brad Jorsch).
3635 PH/42 Give an error if -q is specified more than once.
3637 PH/43 Renamed the variables $interface_address and $interface_port as
3638 $received_ip_address and $received_port, to make it clear that these
3639 values apply to message reception, and not to the outgoing interface when
3640 a message is delivered. (The old names remain recognized, of course.)
3642 PH/44 There was no timeout on the connect() call when using a Unix domain
3643 socket in the ${readsocket expansion. There now is.
3645 PH/45 Applied a modified version of Brad Jorsch's patch to allow "message" to
3646 be meaningful with "accept".
3648 SC/01 Eximstats V1.43
3649 Bug fix for V1.42 with -h0 specified. Spotted by Chris Lear.
3651 SC/02 Eximstats V1.44
3652 Use a glob alias rather than an array ref in the generated
3653 parser. This improves both readability and performance.
3655 SC/03 Eximstats V1.45 (Marco Gaiarin / Steve Campbell)
3656 Collect SpamAssassin and rejection statistics.
3657 Don't display local sender or destination tables unless
3658 there is data to show.
3659 Added average volumes into the top table text output.
3661 SC/04 Eximstats V1.46
3662 Collect data on the number of addresses (recipients)
3663 as well as the number of messages.
3665 SC/05 Eximstats V1.47
3666 Added 'Message too big' to the list of mail rejection
3667 reasons (thanks to Marco Gaiarin).
3669 SC/06 Eximstats V1.48
3670 Mainlog lines which have GMT offsets and are too short to
3671 have a flag are now skipped.
3673 SC/07 Eximstats V1.49 (Alain Williams)
3674 Added the -emptyok flag.
3676 SC/08 Eximstats V1.50
3677 Fixes for obtaining the IP address from reject messages.
3679 JJ/03 exipick.20061117.2, made header handling as similar to exim as possible
3680 (added [br]h_ prefixes, implemented RFC2047 decoding. Fixed
3681 whitespace changes from 4.64-PH/27
3683 JJ/04 exipick.20061117.2, fixed format and added $message_headers_raw to
3686 JJ/05 exipick.20061117.2, bug fixes (error out sooner when invalid criteria
3687 are found, allow negative numbers in numeric criteria)
3689 JJ/06 exipick.20061117.2, added new $message_body_missing variable
3691 JJ/07 exipick.20061117.2, added $received_ip_address and $received_port
3692 to match changes made in 4.64-PH/43
3694 PH/46 Applied Jori Hamalainen's patch to add features to exiqsumm.
3696 PH/47 Put in an explicit test for a DNS lookup of an address record where the
3697 "domain" is actually an IP address, and force a failure. This locks out
3698 those revolvers/nameservers that support "A-for-A" lookups, in
3699 contravention of the specifications.
3701 PH/48 When a host name was looked up from an IP address, and the subsequent
3702 forward lookup of the name timed out, the host name was left in
3703 $sender_host_name, contrary to the specification.
3705 PH/49 Although default lookup types such as lsearch* or cdb*@ have always been
3706 restricted to single-key lookups, Exim was not diagnosing an error if
3707 * or *@ was used with a query-style lookup.
3709 PH/50 Increased the value of DH_BITS in tls-gnu.c from 768 to 1024.
3711 MH/01 local_scan ABI version incremented to 1.1. It should have been updated
3712 long ago, but noone interested enough thought of it. Let's just say that
3713 the "1.1" means that there are some new functions that weren't there at
3714 some point in the past.
3716 PH/51 Error processing for expansion failure of helo_data from an smtp
3717 transport during callout processing was broken.
3719 PH/52 Applied John Jetmore's patch to allow tls-on-connect and STARTTLS to be
3720 tested/used via the -bh/-bhc/-bs options.
3722 PH/53 Added missing "#include <time.h>" to pcre/pcretest.c (this was a PCRE
3723 bug, fixed in subsequent PCRE releases).
3725 PH/54 Applied Robert Bannocks' patch to avoid a problem with references that
3726 arises when using the Solaris LDAP libraries (but not with OpenLDAP).
3728 PH/55 Check for a ridiculously long file name in exim_dbmbuild.
3734 SC/01 Use a glob alias rather than an array ref in eximstats generated
3735 parser. This improves both readability and performance.
3737 SC/02 Collect SpamAssassin and rejection statistics in eximstats.
3738 Don't display local sender or destination tables in eximstats unless
3739 there is data to show.
3740 Added average volumes into the eximstats top table text output.
3742 SC/03 Collect data on the number of addresses (recipients) as well
3743 as the number of messages in eximstats.
3745 TF/01 Correct an error in the documentation for the redirect router. Exim
3746 does (usually) call initgroups() when daemonizing.
3748 TF/02 Call initgroups() when dropping privilege in exim.c, so that Exim runs
3749 with consistent privilege compared to when running as a daemon.
3751 TF/03 Note in the spec that $authenticated_id is not set for local
3752 submissions from trusted users.
3754 TF/04 The ratelimit per_rcpt option now works correctly in acl_not_smtp.
3755 Thanks to Dean Brooks <dean@iglou.com> for the patch.
3757 TF/05 Make it easier to get SMTP authentication and TLS/SSL support working
3758 by adding some example configuration directives to the default
3759 configuration file. A little bit of work is required to uncomment the
3760 directives and define how usernames and passwords are checked, but
3761 there is now a framework to start from.
3763 PH/01 Added #define LDAP_DEPRECATED 1 to ldap.c because some of the "old"
3764 functions that Exim currently uses aren't defined in ldap.h for OpenLDAP
3765 without this. I don't know how relevant this is to other LDAP libraries.
3767 PH/02 Add the verb name to the "unknown ACL verb" error.
3769 PH/03 Magnus Holmgren's patch for filter_prepend_home.
3771 PH/03 Fixed Bugzilla #101: macro definition between ACLs doesn't work.
3773 PH/04 Applied Magnus Holmgren's patch to fix Bugzilla #98: transport's home
3774 directory not expanded when it should be if an expanded home directory
3775 was set for the address (which is overridden by the transport).
3777 PH/05 Applied Alex Kiernan's patch to fix Bugzilla #99: a problem with
3780 PH/06 Added acl_not_smtp_start, based on Johannes Berg's patch, and set the
3781 bit to forbid control=suppress_local_fixups in the acl_not_smtp ACL,
3782 because it is too late at that time, and has no effect.
3784 PH/07 Changed ${quote_pgsql to quote ' as '' instead of \' because of a
3785 security issue with \' (bugzilla #107). I could not use the
3786 PQescapeStringConn() function, because it needs a PGconn value as one of
3789 PH/08 When testing addresses using -bt, indicate those final addresses that
3790 are duplicates that would not cause an additional delivery. At least one
3791 person was confused, thinking that -bt output corresponded to deliveries.
3792 (Suppressing duplicates isn't a good idea as you lose the information
3793 about possibly different redirections that led to the duplicates.)
3795 PH/09 Applied patch from Erik to use select() instead of poll() in spam.c on
3796 systems where poll() doesn't work, in particular OS X.
3798 PH/10 Added more information to debugging output for retry time not reached.
3800 PH/11 Applied patch from Arkadiusz Miskiewicz to apply a timeout to read
3801 operations in malware.c.
3803 PH/12 Applied patch from Magnus Holmgren to include the "h" tag in Domain Keys
3806 PH/13 If write_rejectlog was set false when logging was sent to syslog with
3807 syslog_duplication set false, log lines that would normally be written
3808 both the the main log and to the reject log were not written to syslog at
3811 PH/14 In the default configuration, change the use of "message" in ACL warn
3812 statements to "add_header".
3814 PH/15 Diagnose a filter syntax error for "seen", "unseen", or "noerror" if not
3815 not followed by a command (e.g. "seen endif").
3817 PH/16 Recognize SMTP codes at the start of "message" in ACLs and after :fail:
3818 and :defer: in a redirect router. Add forbid_smtp_code to suppress the
3821 PH/17 Added extra conditions to the default value of delay_warning_condition
3825 { !eq{$h_list-id:$h_list-post:$h_list-subscribe:}{} } \
3826 { match{$h_precedence:}{(?i)bulk|list|junk} } \
3827 { match{$h_auto-submitted:}{(?i)auto-generated|auto-replied} } \
3830 The Auto-Submitted: and various List- headers are standardised, whereas I
3831 don't think Precedence: ever was.
3833 PH/18 Refactored debugging code in route_finduser() to show more information,
3834 in particular, the error code if getpwnam() issues one.
3836 PH/19 Added PQsetClientEncoding(conn, "SQL_ASCII") to the pgsql code module.
3837 This is apparently needed in addition to the PH/07 change above to avoid
3838 any possible encoding problems.
3840 PH/20 Perl can change the locale. Exim was resetting it after a ${perl call,
3841 but not after initializing Perl.
3843 PH/21 Added a call to PQsetNoticeProcessor() to catch pgsql "notices" and
3844 output them only if debugging. By default they are written stderr,
3845 apparently, which is not desirable.
3847 PH/22 Added Alain Williams' LDAP patch to support setting REFERRALS=off on
3850 JJ/01 exipick: added --reverse (and -R synonym), --random, --size, --sort and
3853 JJ/02 exipick: rewrote --help documentation to hopefully make more clear.
3855 PH/23 Made -oMaa and -oMt work with -bh and -bs to pretend the connection is
3856 authenticated or an ident call has been made. Suppress the default
3857 values for $authenticated_id and $authenticated_sender (but permit -oMai
3858 and -oMas) when testing with -bh.
3860 PH/24 Re-jigged the order of the tests in the default configuration so that the
3861 tests for valid domains and recipients precede the DNS black list and CSA
3862 tests, on the grounds that those ones are more expensive.
3864 PH/25 Exim was not testing for a space following SMTP commands such as EHLO
3865 that require one. Thus, EHLORHUBARB was interpreted as a valid command.
3866 This bug exists in every version of Exim that I still have, right back to
3869 PH/26 (n)wildlsearch lookups are documented as being done case-insensitively.
3870 However, an attempt to turn on case-sensitivity in a regex key by
3871 including (?-i) didn't work because the subject string was already
3872 lowercased, and the effects were non-intuitive. It turns out that a
3873 one-line patch can be used to allow (?-i) to work as expected.
3879 TF/01 Fix the add_header change below (4.61 PH/55) which had a bug that (amongst
3880 other effects) broke the use of negated acl sub-conditions.
3882 PH/01 ${readsocket now supports Internet domain sockets (modified John Jetmore
3885 PH/02 When tcp-wrappers is called from Exim, it returns only "deny" or "allow".
3886 "Deny" causes Exim to reject the incoming connection with a 554 error.
3887 Unfortunately, if there is a major crisis, such as a disk failure,
3888 tcp-wrappers gives "deny", whereas what one would like would be some
3889 kind of temporary error. A kludge has been added to help with this.
3890 Before calling hosts_ctl(), errno is set zero. If the result is "deny", a
3891 554 error is used if errno is still zero or contains ENOENT (which occurs
3892 if either of the /etc/hosts.{allow,deny} files is missing). Otherwise, a
3895 PH/03 Add -lutil to the default FreeBSD LIBS setting.
3897 PH/04 Change PH/19 for 4.61 was too wide. It should not be applied to host
3898 errors. Otherwise a message that provokes a temporary error (when other
3899 messages do not) can cause a whole host to time out.
3901 PH/05 Batch deliveries by appendfile and pipe transports did not work when the
3902 addresses were routed directly to files or pipes from a redirect router.
3903 File deliveries just didn't batch; pipe deliveries might have suffered
3906 PH/06 A failure to get a lock for a hints database would erroneously always say
3907 "Failed to get write lock", even when it was really a read lock.
3909 PH/07 The appendfile transport was creating MBX lock files with a fixed mode
3910 of 0600. This has been changed to use the value of the lockfile_mode
3911 option (which defaults to 0600).
3913 PH/08 Applied small patch from the Sieve maintainer.
3915 PH/09 If maildir_quota_directory_regex was set to exclude (say) the .Trash
3916 folder from quota calculations, a direct delivery into this folder messed
3917 up the contents of the maildirsize file. This was because the regex was
3918 used only to exclude .Trash (or whatever) when the size of the mailbox
3919 was calculated. There was no check that a delivery was happening into an
3920 excluded directory. This bug has been fixed by ignoring all quota
3921 processing for deliveries into excluded directories.
3923 PH/10 Added the maildirfolder_create_regex option to appendfile.
3929 PH/01 The code for finding all the local interface addresses on a FreeBSD
3930 system running IPv6 was broken. This may well have applied to all BSD
3931 systems, as well as to others that have similar system calls. The broken
3932 code found IPv4 interfaces correctly, but gave incorrect values for the
3933 IPv6 interfaces. In particular, ::1 was not found. The effect in Exim was
3934 that it would not match correctly against @[] and not recognize the IPv6
3937 PH/02 The ipliteral router was not recognizing addresses of the form user@
3938 [ipv6:....] because it didn't know about the "ipv6:" prefix.
3940 PH/03 Added disable_ipv6.
3942 PH/04 Changed $reply_address to use the raw form of the headers instead of the
3943 decoded form, because it is most often used to construct To: headers
3944 lines in autoreplies, and the decoded form may well be syntactically
3945 invalid. However, $reply_address has leading white space removed, and all
3946 newlines turned into spaces so that the autoreply transport does not
3949 PH/05 If group was specified without a user on a router, and no group or user
3950 was specified on a transport, the group from the router was ignored.
3952 PH/06 Increased the number of ACL variables to 20 of each type, and arranged
3953 for visible compile-time settings that can be used to change these
3954 numbers, for those that want even more. Backwards compatibility with old
3955 spool files has been maintained. However, going back to a previous Exim
3956 release will lost any variables that are in spool files.
3958 PH/07 Two small changes when running in the test harness: increase delay when
3959 passing a TCP/IP connection to a new process, in case the original
3960 process has to generate a bounce, and remove special handling of
3961 127.0.0.2 (sic), which is no longer necessary.
3963 PH/08 Changed debug output of dbfn_open() flags from numbers to names, so as to
3964 be the same on different OS.
3966 PH/09 Moved a debug statement in filter processing to avoid a race problem when
3969 JJ/01 exipick: fixed bug where -b (brief) output option showed "Vars:"
3970 whether --show-vars was specified or not
3972 JJ/02 exipick: Added support for new ACL variable spool format introduced
3975 PH/10 Fixed another bug related to PH/04 above: if an incoming message had a
3976 syntactically invalid From: or Reply-to: line, and a filter used this to
3977 generate an autoreply, and therefore failed to obtain an address for the
3978 autoreply, Exim could try to deliver to a non-existent relative file
3979 name, causing unrelated and misleading errors. What now happens is that
3980 it logs this as a hard delivery error, but does not attempt to create a
3983 PH/11 The exinext utility has a -C option for testing purposes, but although
3984 the given file was scanned by exinext itself; it wasn't being passed on
3985 when Exim was called.
3987 PH/12 In the smtp transport, treat an explicit ECONNRESET error the same as
3988 an end-of-file indication when reading a command response.
3990 PH/13 Domain literals for IPv6 were not recognized unless IPv6 support was
3991 compiled. In many other places in Exim, IPv6 addresses are always
3992 recognized, so I have changed this. It also means that IPv4 domain
3993 literals of the form [IPV4:n.n.n.n] are now always recognized.
3995 PH/14 When a uid/gid is specified for the queryprogram router, it cannot be
3996 used if the router is not running as root, for example, when verifying at
3997 ACL time, or when using -bh. The debugging output from this situation was
3998 non-existent - all you got was a failure to exec. I have made two
4001 (a) Failures to set uid/gid, the current directory, or a process leader
4002 in a subprocess such as that created by queryprogram now generate
4003 suitable debugging output when -d is set.
4005 (b) The queryprogram router detects when it is not running as root,
4006 outputs suitable debugging information if -d is set, and then runs
4007 the subprocess without attempting to change uid/gid.
4009 PH/15 Minor change to Makefile for building test_host (undocumented testing
4012 PH/16 As discussed on the list in Nov/Dec: Exim no longer looks at the
4013 additional section of a DNS packet that returns MX or SRV records.
4014 Instead, it always explicitly searches for A/AAAA records. This avoids
4015 major problems that occur when a DNS server includes only records of one
4016 type (A or AAAA) in an MX/SRV packet. A byproduct of this change has
4017 fixed another bug: if SRV records were looked up and the corresponding
4018 address records were *not* found in the additional section, the port
4019 values from the SRV records were lost.
4021 PH/17 If a delivery to a pipe, file, or autoreply was deferred, Exim was not
4022 using the correct key (the original address) when searching the retry
4023 rules in order to find which one to use for generating the retry hint.
4025 PH/18 If quota_warn_message contains a From: header, Exim now refrains from
4026 adding the default one. Similarly, if it contains a Reply-To: header, the
4027 errors_reply_to option, if set, is not used.
4029 PH/19 When calculating a retry time, Exim used to measure the "time since
4030 failure" by looking at the "first failed" field in the retry record. Now
4031 it does not use this if it is later than than the arrival time of the
4032 message. Instead it uses the arrival time. This makes for better
4033 behaviour in cases where some deliveries succeed, thus re-setting the
4034 "first failed" field. An example is a quota failure for a huge message
4035 when small messages continue to be delivered. Without this change, the
4036 "time since failure" will always be short, possible causing more frequent
4037 delivery attempts for the huge message than are intended.
4038 [Note: This change was subsequently modified - see PH/04 for 4.62.]
4040 PH/20 Added $auth1, $auth2, $auth3 to contain authentication data (as well as
4041 $1, $2, $3) because the numerical variables can be reset during some
4042 expansion items (e.g. "match"), thereby losing the authentication data.
4044 PH/21 Make -bV show the size of off_t variables so that the test suite can
4045 decide whether to run tests for quotas > 2G.
4047 PH/22 Test the values given for quota, quota_filecount, quota_warn_threshold,
4048 mailbox_size, and mailbox_filecount in the appendfile transport. If a
4049 filecount value is greater than 2G or if a quota value is greater than 2G
4050 on a system where the size of off_t is not greater than 4, a panic error
4053 PH/23 When a malformed item such as 1.2.3/24 appears in a host list, it can
4054 never match. The debug and -bh output now contains an explicit error
4055 message indicating a malformed IPv4 address or mask.
4057 PH/24 An host item such as 1.2.3.4/abc was being treated as the IP address
4058 1.2.3.4 without a mask. Now it is not recognized as an IP address, and
4059 PH/23 above applies.
4061 PH/25 Do not write to syslog when running in the test harness. The only
4062 occasion when this arises is a failure to open the main or panic logs
4063 (for which there is an explicit test).
4065 PH/26 Added the /no_tell option to "control=freeze".
4067 PH/27 If a host name lookup failed very early in a connection, for example, if
4068 the IP address matched host_lookup and the reverse lookup yielded a name
4069 that did not have a forward lookup, an error message of the form "no IP
4070 address found for host xxx.xxx.xxx (during SMTP connection from NULL)"
4071 could be logged. Now it outputs the IP address instead of "NULL".
4073 PH/28 An enabling patch from MH: add new function child_open_exim2() which
4074 allows the sender and the authenticated sender to be set when
4075 submitting a message from within Exim. Since child_open_exim() is
4076 documented for local_scan(), the new function should be too.
4078 PH/29 In GnuTLS, a forced expansion failure for tls_privatekey was not being
4079 ignored. In both GnuTLS and OpenSSL, an expansion of tls_privatekey that
4080 results in an empty string is now treated as unset.
4082 PH/30 Fix eximon buffer overflow bug (Bugzilla #73).
4084 PH/31 Added sender_verify_fail logging option.
4086 PH/32 In November 2003, the code in Exim that added an empty Bcc: header when
4087 needed by RFC 822 but not by RFC 2822 was commented out. I have now
4088 tidied the source and removed it altogether.
4090 PH/33 When a queue run was abandoned because the load average was too high, a
4091 log line was always written; now it is written only if the queue_run log
4092 selector is set. In addition, the log line for abandonment now contains
4093 information about the queue run such as the pid. This is always present
4094 in "start" and "stop" lines but was omitted from the "abandon" line.
4096 PH/34 Omit spaces between a header name and the colon in the error message that
4097 is given when verify = headers_syntax fails (if there are lots of them,
4098 the message gets confusing).
4100 PH/35 Change the default for dns_check_names_pattern to allow slashes within
4101 names, as there are now some PTR records that contain slashes. This check
4102 is only to protect against broken name servers that fall over on strange
4103 characters, so the fact that it applies to all lookups doesn't matter.
4105 PH/36 Now that the new test suite is complete, we can remove some of the
4106 special code in Exim that was needed for the old test suite. For example,
4107 sorting DNS records because real resolvers return them in an arbitrary
4108 order. The new test suite's fake resolver always returns records in the
4111 PH/37 When running in the test harness, use -odi for submitted messages (e.g.
4112 bounces) except when queue_only is set, to avoid logging races between
4113 the different processes.
4115 PH/38 Panic-die if .include specifies a non-absolute path.
4117 PH/39 A tweak to the "H" retry rule from its user.
4119 JJ/03 exipick: Removed parentheses from 'next' and 'last' calls that specified
4120 a label. They prevented compilation on older perls.
4122 JJ/04 exipick: Refactored code to prevent implicit split to @_ which caused
4123 a warning to be raised on newish perls.
4125 JJ/05 exipick: Fixed bug where -bpc always showed a count of all messages
4126 on queue. Changes to match documented behaviour of showing count of
4127 messages matching specified criteria.
4129 PH/40 Changed the default ident timeout from 30s to 5s.
4131 PH/41 Added support for the use of login_cap features, on those BSD systems
4132 that have them, for controlling the resources used by pipe deliveries.
4134 PH/42 The content-scanning code uses fopen() to create files in which to put
4135 message data. Previously it was not paying any attention to the mode of
4136 the files. Exim runs with umask(0) because the rest of the code creates
4137 files with open(), and sets the required mode explicitly. Thus, these
4138 files were ending up world-writeable. This was not a big issue, because,
4139 being within the spool directory, they were not world-accessible. I have
4140 created a function called modefopen, which takes an additional mode
4141 argument. It sets umask(777), creates the file, chmods it to the required
4142 mode, then resets the umask. All the relevant calls to fopen() in the
4143 content scanning code have been changed to use this function.
4145 PH/43 If retry_interval_max is set greater than 24 hours, it is quietly reset
4146 to 24 hours. This avoids potential overflow problems when processing G
4147 and H retry rules. I suspect nobody ever tinkers with this value.
4149 PH/44 Added STRIP_COMMAND=/usr/bin/strip to the FreeBSD Makefile.
4151 PH/45 When the plaintext authenticator is running as a client, the server's
4152 challenges are checked to ensure they are valid base64 strings. By
4153 default, the authentication attempt is cancelled if an invalid string is
4154 received. Setting client_ignore_invalid_base64 true ignores these errors.
4155 The decoded challenge strings are now placed in $auth1, $auth2, etc. as
4156 they are received. Thus, the responses can be made to depend on the
4157 challenges. If an invalid string is ignored, an empty string is placed in
4160 PH/46 Messages that are created by the autoreply transport now contains a
4161 References: header, in accordance with RFCs 2822 and 3834.
4163 PH/47 Added authenticated_sender_force to the smtp transport.
4165 PH/48 The ${prvs expansion was broken on systems where time_t was long long.
4167 PH/49 Installed latest patch from the Sieve maintainer.
4169 PH/50 When an Exim quota was set without a file count quota, and mailbox_size
4170 was also set, the appendfile transport was unnecessarily scanning a
4171 directory of message files (e.g. for maildir delivery) to find the count
4172 of files (along with the size), even though it did not need this
4173 information. It now does the scan only if it needs to find either the
4174 size of the count of files.
4176 PH/51 Added ${time_eval: to convert Exim time strings into seconds.
4178 PH/52 Two bugs concerned with error handling when the smtp transport is
4181 (i) Exim was not creating retry information for temporary errors given
4182 for individual recipients after the DATA command when the smtp transport
4183 was used in LMTP mode. This meant that they could be retried too
4184 frequently, and not timed out correctly.
4186 (ii) Exim was setting the flag that allows error details to be returned
4187 for LMTP errors on RCPT commands, but not for LMTP errors for individual
4188 recipients that were returned after the DATA command.
4190 PH/53 This is related to PH/52, but is more general: for any failing address,
4191 when detailed error information was permitted to be returned to the
4192 sender, but the error was temporary, then after the final timeout, only
4193 "retry timeout exceeded" was returned. Now it returns the full error as
4194 well as "retry timeout exceeded".
4196 PH/54 Added control=allow_auth_unadvertised, as it seems there are clients that
4197 do this, and (what is worse) MTAs that accept it.
4199 PH/55 Added the add_header modified to ACLs. The use of "message" with "warn"
4200 will now be deprecated.
4202 PH/56 New os.c-cygwin from the Cygwin maintainer.
4204 JJ/06 exipick: added --unsorted option to allow unsorted output in all output
4205 formats (previously only available in exim formats via -bpr, -bpru,
4206 and -bpra. Now also available in native and exiqgrep formats)
4208 JJ/07 exipick: added --freeze and --thaw options to allow faster interaction
4209 with very large, slow to parse queues
4211 JJ/08 exipick: added ! as generic prefix to negate any criteria format
4213 JJ/09 exipick: miscellaneous performance enhancements (~24% improvements)
4215 PH/57 Tidies in SMTP dialogue display in debug output: (i) It was not showing
4216 responses to authentication challenges, though it was showing the
4217 challenges; (ii) I've removed the CR characters from the debug output for
4220 PH/58 Allow for the insertion of a newline as well as a space when a string
4221 is turned into more than one encoded-word during RFC 2047 encoding. The
4222 Sieve code now uses this.
4224 PH/59 Added the following errors that can be detected in retry rules: mail_4xx,
4225 data_4xx, lost_connection, tls_required.
4227 PH/60 When a VRFY deferred or FAILED, the log message rather than the user
4228 message was being sent as an SMTP response.
4230 PH/61 Add -l and -k options to exicyclog.
4232 PH/62 When verifying, if an address was redirected to one new address, so that
4233 verification continued, and the new address failed or deferred after
4234 having set something in $address_data, the value of $address_data was not
4235 passed back to the ACL. This was different to the case when no
4236 redirection occurred. The value is now passed back in both cases.
4238 PH/63 Changed the macro HAVE_LOGIN_CAP (see PH/41 for this release above) to
4239 HAVE_SETCLASSRESOURCES because there are different APIs in use that all
4240 use login_cap.h, so on its own it isn't the distinguishing feature. The
4241 new name refers directly to the setclassresources() function.
4243 PH/65 Added configuration files for NetBSD3.
4245 PH/66 Updated OS/Makefile-HP-UX for gcc 4.1.0 with HP-UX 11.
4247 PH/67 Fixed minor infelicity in the sorting of addresses to ensure that IPv6
4248 is preferred over IPv4.
4250 PH/68 The bounce_return_message and bounce_return_body options were not being
4251 honoured for bounces generated during the reception of non-SMTP messages.
4252 In particular, this applied to messages rejected by the ACL. This bug has
4253 been fixed. However, if bounce_return_message is true and bounce_return_
4254 body is false, the headers that are returned for a non-SMTP message
4255 include only those that have been read before the error was detected.
4256 (In the case of an ACL rejection, they have all been read.)
4258 PH/69 The HTML version of the specification is now built in a directory called
4259 spec_html instead of spec.html, because the latter looks like a path with
4260 a MIME-type, and this confuses some software.
4262 PH/70 Catch two compiler warnings in sieve.c.
4264 PH/71 Fixed an obscure and subtle bug (thanks Alexander & Matthias). The
4265 function verify_get_ident() calls ip_connect() to connect a socket, but
4266 if the "connect()" function timed out, ip_connect() used to close the
4267 socket. However, verify_get_ident() also closes the socket later, and in
4268 between Exim writes to the log, which may get opened at this point. When
4269 the socket was closed in ip_connect(), the log could get the same file
4270 descriptor number as the socket. This naturally causes chaos. The fix is
4271 not to close the socket in ip_connect(); the socket should be closed by
4272 the function that creates it. There was only one place in the code where
4273 this was missing, in the iplookup router, which I don't think anybody now
4274 uses, but I've fixed it anyway.
4276 PH/72 Make dns_again_means_nonexist apply to lookups using gethostbyname() as
4277 well as to direct DNS lookups. Otherwise the handling of names in host
4278 lists is inconsistent and therefore confusing.
4284 PH/01 Two changes to the default runtime configuration:
4286 (1) Move the checks for relay_from_hosts and authenticated clients from
4287 after to before the (commented out) DNS black list checks.
4289 (2) Add control=submission to the relay_from_hosts and authenticated
4290 clients checks, on the grounds that messages accepted by these
4291 statements are most likely to be submissions.
4293 PH/02 Several tidies to the handling of ${prvs and ${prvscheck:
4295 (1) Generate an error if the third argument for the ${prvs expansion is
4298 (2) Treat a missing third argument of ${prvscheck as if it were an empty
4301 (3) Reset the variables that are obtained from the first argument of
4302 ${prvscheck and used in the second argument before leaving the code,
4303 because their memory is reclaimed, so using them afterwards may do
4306 (4) Tidy up the code for expanding the arguments of ${prvscheck one by
4307 one (it's much easier than Tom thought :-).
4309 (5) Because of (4), we can now allow for the use of $prvscheck_result
4310 inside the third argument.
4312 PH/03 For some reason, the default setting of PATH when running a command from
4313 a pipe transport was just "/usr/bin". I have changed it to
4316 PH/04 SUPPORT_TRANSLATE_IP_ADDRESS and MOVE_FROZEN_MESSAGES did not cause
4317 anything to be listed in the output from -bV.
4319 PH/05 When a filter generated an autoreply, the entire To: header line was
4320 quoted in the delivery log line, like this:
4322 => >A.N.Other <ano@some.domain> <original@ddress> ...
4324 This has been changed so that it extracts the operative address. There
4325 may be more than one such address. If so, they are comma-separated, like
4328 => >ano@some.domain,ona@other.domain <original@ddress> ...
4330 PH/06 When a client host used a correct literal IP address in a HELO or EHLO
4331 command, (for example, EHLO [1.2.3.4]) and the client's IP address was
4332 not being looked up in the rDNS to get a host name, Exim was showing the
4333 IP address twice in Received: lines, even though the IP addresses were
4334 identical. For example:
4336 Received: from [1.2.3.4] (helo=[1.2.3.4])
4338 However, if the real host name was known, it was omitting the HELO data
4339 if it matched the actual IP address. This has been tidied up so that it
4340 doesn't show the same IP address twice.
4342 PH/07 When both +timestamp and +memory debugging was on, the value given by
4343 $tod_xxx expansions could be wrong, because the tod_stamp() function was
4344 called by the debug printing, thereby overwriting the timestamp buffer.
4345 Debugging no longer uses the tod_stamp() function when +timestamp is set.
4347 PH/08 When the original message was included in an autoreply transport, it
4348 always said "this is a copy of the message, including all the headers",
4349 even if body_only or headers_only was set. It now gives an appropriate
4352 PH/09 Applied a patch from the Sieve maintainer which:
4354 o fixes some comments
4355 o adds the (disabled) notify extension core
4356 o adds some debug output for the result of if/elsif tests
4357 o points to the current vacation draft in the documentation
4358 and documents the missing references header update
4362 o fixes a bug in processing the envelope test (when testing
4363 multiple envelope elements, the last element determined the
4366 PH/10 Exim was violating RFC 3834 ("Recommendations for Automatic Responses to
4367 Electronic Mail") by including:
4369 Auto-submitted: auto-generated
4371 in the messages that it generates (bounce messages and others, such as
4372 warnings). In the case of bounce messages for non-SMTP messages, there was
4373 also a typo: it was using "Auto_submitted" (underscore instead of
4374 hyphen). Since every message generated by Exim is necessarily in response
4375 to another message, thes have all been changed to:
4377 Auto-Submitted: auto-replied
4379 in accordance with these statements in the RFC:
4381 The auto-replied keyword:
4383 - SHOULD be used on messages sent in direct response to another
4384 message by an automatic process,
4386 - MUST NOT be used on manually-generated messages,
4388 - MAY be used on Delivery Status Notifications (DSNs) and Message
4389 Disposition Notifications (MDNs),
4391 - MUST NOT be used on messages generated by automatic or periodic
4392 processes, except for messages which are automatic responses to
4395 PH/11 Added "${if def:sender_address {(envelope-from <$sender_address>)\n\t}}"
4396 to the default Received: header definition.
4398 PH/12 Added log selector acl_warn_skipped (default on).
4400 PH/13 After a successful wildlsearch lookup, discard the values of numeric
4401 variables because (a) they are in the wrong storage pool and (b) even if
4402 they were copied, it wouldn't work properly because of the caching.
4404 PH/14 Add check_rfc2047_length to disable enforcement of RFC 2047 length
4405 checking when decoding. Apparently there are clients that generate
4406 overlong encoded strings. Why am I not surprised?
4408 PH/15 If the first argument of "${if match_address" was not empty, but did not
4409 contain an "@" character, Exim crashed. Now it writes a panic log message
4410 and treats the condition as false.
4412 PH/16 In autoreply, treat an empty string for "once" the same as unset.
4414 PH/17 A further patch from the Sieve maintainer: "Introduce the new Sieve
4415 extension "envelope-auth". The code is finished and in agreement with
4416 other implementations, but there is no documentation so far and in fact,
4417 nobody wrote the draft yet. This extension is currently #undef'ed, thus
4418 not changing the active code.
4420 Print executed "if" and "elsif" statements when debugging is used. This
4421 helps a great deal to understand what a filter does.
4423 Document more things not specified clearly in RFC3028. I had all this
4424 sorted out, when out of a sudden new issues came to my mind. Oops."
4426 PH/18 Exim was not recognizing the "net-" search type prefix in match_ip lists
4429 PH/19 Exim expands the IPv6 address given to -bh to its full non-abbreviated
4430 canonical form (as documented). However, after a host name lookup from
4431 the IP address, check_host() was doing a simple string comparison with
4432 addresses acquired from the DNS when checking that the found name did
4433 have the original IP as one of its addresses. Since any found IPv6
4434 addresses are likely to be in abbreviated form, the comparison could
4435 fail. Luckily, there already exists a function for doing the comparison
4436 by converting both addresses to binary, so now that is used instead of
4437 the text comparison.
4439 PH/20 There was another similar case to PH/19, when a complete host name was
4440 given in a host list; looking up its IP address could give an abbreviated
4441 form, whereas the current host's name might or might not be abbreviated.
4442 The same fix has been applied.
4448 PH/01 The ${base62: operator adjusted itself to base 36 when BASE_62 was
4449 set to 36 (for Darwin and Cygwin), but the ${base62d: operator did not.
4452 PH/02 Two minor problems detected in Cygwin: the os.{c,h} files had lost */ on
4453 the CVS lines, and there was a missing #if HAVE_IPV6 in host.c.
4455 PH/03 Typo: missing ".o" in src/pcre/Makefile.
4457 PH/04 Tighten up "personal" tests: Instead of testing for any "List-"
4458 header line, restrict the check to what is listed in RFCs 2369 and 2929.
4459 Also, for "Auto-Submitted", treat anything other than "no" as
4460 non-personal, in accordance with RFC 3834. (Previously it treated
4461 anything starting "auto-" as non-personal.)
4463 TF/01 The control=submission/name=... option had a problem with syntax
4464 errors if the name included a slash character. The /name= option
4465 now slurps the rest of the string, so it can include any characters
4466 but it must come last in the list of options (after /sender_retain
4469 PH/05 Some modifications to the interface to the fake nameserver for the new
4477 TK/01 Added the "success_on_redirect" address verification option. See
4478 NewStuff for rationale and an example.
4480 PH/01 Added support for SQLite, basic code supplied by David Woodhouse.
4482 PH/02 Patch to exigrep to allow it to work on syslog lines.
4484 PH/03 When creating an mbox file for a virus/spam scan, use fseek() instead of
4485 fread() to skip over the body file's header line, because in Cygwin the
4486 header line is locked and is inaccessible.
4488 PH/04 Added $message_exim_id, ultimately to replace $message_id (they will both
4489 co-exist for some time) to make it clear that it is the Exim ID that is
4490 referenced, not the Message-ID: header line.
4492 PH/05 Replaced all Tom's calls to snprintf() with calls to the internal
4493 string_format() function, because snprintf() does not exist on all
4496 PH/06 The use of forbid_filter_existstest now also locks out the use of the
4497 ${stat: expansion item.
4499 PH/07 Changed "SMTP protocol violation: synchronization error" into "SMTP
4500 protocol synchronization error", to keep the pedants happy.
4502 PH/08 Arrange for USE_INET_NTOA_FIX to be set in config.h for AIX systems as
4503 well as for IRIX systems, when gcc is being used. See the host.c source
4506 PH/09 Installed latest Cygwin configuration files from the Cygwin maintainer.
4508 PH/10 Named domain lists were not working if used in a queue_smtp_domains
4511 PH/11 Added support for the IGNOREQUOTA extension to LMTP, both to the lmtp
4512 transport and to the smtp transport in LMTP mode.
4514 TK/02 Remove one case of BASE64 error detection FTTB (undocumented anyway).
4516 PH/12 There was a missing call to search_tidyup() before the fork() in rda.c to
4517 run a filter in a subprocess. This could lead to confusion in subsequent
4518 lookups in the parent process. There should also be a search_tidyup() at
4519 the end of the subprocess.
4521 PH/13 Previously, if "verify = helo" was set in an ACL, the condition was true
4522 only if the host matched helo_try_verify_hosts, which caused the
4523 verification to occur when the EHLO/HELO command was issued. The ACL just
4524 tested the remembered result. Now, if a previous verification attempt has
4525 not happened, "verify = helo" does it there and then.
4527 JJ/01 exipick: added $message_exim_id variable (see 4.53-PH/04)
4529 TK/03 Fix log output including CR from clamd.
4531 PH/14 A reference to $reply_address when Reply-to: was empty and From: did not
4532 exist provoked a memory error which could cause a segfault.
4534 PH/15 Installed PCRE 6.2
4536 PH/17 Defined BIND_8_COMPAT in the Darwin os.h file.
4538 PH/18 Reversed 4.52/PH/17 because the HP-UX user found it wasn't the cause
4539 of the problem. Specifically, suggested +O2 rather than +O1 for the
4542 PH/19 Added sqlite_lock_timeout option (David Woodhouse's patch).
4544 PH/20 If a delivery was routed to a non-standard port by means of an SRV
4545 record, the port was not correctly logged when the outgoing_port log
4546 selector was set (it logged the transort's default port).
4548 PH/21 Added support for host-specific ports to manualroute, queryprogram,
4549 fallback_hosts, and "hosts" in the smtp transport.
4551 PH/22 If the log selector "outgoing_port" is set, the port is now also given on
4552 host errors such as "Connection refused".
4554 PH/23 Applied a patch to fix problems with exim-4.52 while doing radius
4555 authentication with radiusclient 0.4.9:
4557 - Error returned from rc_read_config was caught wrongly
4558 - Username/password not passed on to radius server due to wrong length.
4560 The presumption is that some radiusclient API changes for 4.51/PH/17
4561 were not taken care of correctly. The code is still untested by me (my
4562 Linux distribution still has 0.3.2 of radiusclient), but it was
4563 contributed by a Radius user.
4565 PH/24 When doing a callout, the value of $domain wasn't set correctly when
4566 expanding the "port" option of the smtp transport.
4568 TK/04 MIME ACL: Fix buffer underrun that occurs when EOF condition is met
4569 while reading a MIME header. Thanks to Tom Hughes for a patch.
4571 PH/24 Include config.h inside local_scan.h so that configuration settings are
4574 PH/25 Make $smtp_command_argument available after all SMTP commands. This means
4575 that in an ACL for RCPT (for example), you can examine exactly what was
4578 PH/26 Exim was recognizing IPv6 addresses of the form [IPv6:....] in EHLO
4579 commands, but it was not correctly comparing the address with the actual
4580 client host address. Thus, it would show the EHLO address in Received:
4581 header lines when this was not necessary.
4583 PH/27 Added the % operator to ${eval:}.
4585 PH/28 Exim tries to create and chdir to its spool directory when it starts;
4586 it should be ignoring failures (because with -C, for example, it has lost
4587 privilege). It wasn't ignoring creation failures other than "already
4590 PH/29 Added "crypteq" to the list of supported features that Exim outputs when
4593 PH/30 Fixed (presumably very longstanding) bug in exim_dbmbuild: if it failed
4594 because an input line was too long, either on its own, or by virtue of
4595 too many continuations, the temporary file was not being removed, and the
4596 return code was incorrect.
4598 PH/31 Missing "BOOL" in function definition in filtertest.c.
4600 PH/32 Applied Sieve patches from the maintainer.
4602 TK/05 Domainkeys: Accomodate for a minor API change in libdomainkeys 0.67.
4604 PH/33 Added "verify = not_blind".
4606 PH/34 There are settings for CHOWN_COMMAND and MV_COMMAND that can be used in
4607 Local/Makefile (with some defaults set). These are used in built scripts
4608 such as exicyclog, but they have never been used in the exim_install
4609 script (though there are many overriding facilities there). I have
4610 arranged that the exim_install script now takes note of these two
4613 PH/35 Installed configuration files for Dragonfly.
4615 PH/36 When a locally submitted message by a trusted user did not contain a
4616 From: header, and the sender address was obtained from -f or from an SMTP
4617 MAIL command, and the trusted user did not use -F to supply a sender
4618 name, $originator_name was incorrectly used when constructing a From:
4619 header. Furthermore, $originator_name was used for submission mode
4620 messages from external hosts without From: headers in a similar way,
4621 which is clearly wrong.
4623 PH/37 Added control=suppress_local_fixups.
4625 PH/38 When log_selector = +received_sender was set, and the addition of the
4626 sender made the log line's construction buffer exactly full, or one byte
4627 less than full, an overflow happened when the terminating "\n" was
4630 PH/39 Added a new log selector, "unknown_in_list", which provokes a log entry
4631 when the result of a list match is failure because a DNS lookup failed.
4633 PH/40 RM_COMMAND is now used in the building process.
4635 PH/41 Added a "distclean" target to the top-level Makefile; it deletes all
4636 the "build-* directories that it finds.
4638 PH/42 (But a TF fix): In a domain list, Exim incorrectly matched @[] if the IP
4639 address in a domain literal was a prefix of an interface address.
4641 PH/43 (Again a TF fix): In the dnslookup router, do not apply widen_domains
4642 when verifying a sender address, unless rewrite_headers is false.
4644 PH/44 Wrote a long comment about why errors_to addresses are verified as
4645 recipients, not senders.
4647 TF/01 Add missing LIBS=-lm to OS/Makefile-OpenBSD which was overlooked when
4648 the ratelimit ACL was added.
4650 PH/45 Added $smtp_command for the full command (cf $smtp_command_argument).
4652 PH/46 Added extra information about PostgreSQL errors to the error string.
4654 PH/47 Added an interface to a fake DNS resolver for use by the new test suite,
4655 avoiding the need to install special zones in a real server. This is
4656 backwards compatible; if it can't find the fake resolver, it drops back.
4657 Thus, both old and new test suites can be run.
4659 TF/02 Added util/ratelimit.pl
4661 TF/03 Minor fix to the ratelimit code to improve its behaviour in case the
4662 clock is set back in time.
4664 TF/04 Fix the ratelimit support in exim_fixdb. Patch provided by Brian
4665 Candler <B.Candler@pobox.com>.
4667 TF/05 The fix for PH/43 was not completely correct; widen_domains is always
4668 OK for addresses that are the result of redirections.
4670 PH/48 A number of further additions for the benefit of the new test suite,
4671 including a fake gethostbyname() that interfaces to the fake DNS resolver
4674 TF/06 The fix for widen_domains has also been applied to qualify_single and
4675 search_parents which are the other dnslookup options that can cause
4678 PH/49 Michael Haardt's randomized retrying, but as a separate retry parameter
4681 PH/50 Make never_users, trusted_users, admin_groups, trusted_groups expandable.
4683 TF/07 Exim produced the error message "an SRV record indicated no SMTP
4684 service" if it encountered an MX record with an empty target hostname.
4685 The message is now "an MX or SRV record indicated no SMTP service".
4687 TF/08 Change PH/13 introduced the possibility that verify=helo may defer,
4688 if the DNS of the sending site is misconfigured. This is quite a
4689 common situation. This change restores the behaviour of treating a
4690 helo verification defer as a failure.
4692 PH/51 If self=fail was set on a router, the bounce message did not include the
4693 actual error message.
4699 TF/01 Added support for Client SMTP Authorization. See NewStuff for details.
4701 PH/01 When a transport filter timed out in a pipe delivery, and the pipe
4702 command itself ended in error, the underlying message about the transport
4703 filter timeout was being overwritten with the pipe command error. Now the
4704 underlying error message should be appended to the second error message.
4706 TK/01 Fix poll() being unavailable on Mac OSX 10.2.
4708 PH/02 Reduce the amount of output that "make" produces by default. Full output
4709 can still be requested.
4711 PH/03 The warning log line about a condition test deferring for a "warn" verb
4712 was being output only once per connection, rather than after each
4713 occurrence (because it was using the same function as for successful
4714 "warn" verbs). This seems wrong, so I have changed it.
4716 TF/02 Two buglets in acl.c which caused Exim to read a few bytes of memory that
4717 it should not have, which might have caused a crash in the right
4718 circumstances, but probably never did.
4720 PH/04 Installed a modified version of Tony Finch's patch to make submission
4721 mode fix the return path as well as the Sender: header line, and to
4722 add a /name= option so that you can make the user's friendly name appear
4725 TF/03 Added the control = fakedefer ACL modifier.
4727 TF/04 Added the ratelimit ACL condition. See NewStuff for details. Thanks to
4728 Mark Lowes for thorough testing.
4730 TK/02 Rewrote SPF support to work with libspf2 versions >1.2.0.
4732 TK/03 Merged latest SRS patch from Miles Wilton.
4734 PH/05 There's a shambles in IRIX6 - it defines EX_OK in unistd.h which conflicts
4735 with the definition in sysexits.h (which is #included earlier).
4736 Fortunately, Exim does not actually use EX_OK. The code used to try to
4737 preserve the sysexits.h value, by assuming that macro definitions were
4738 scanned for macro replacements. I have been disabused of this notion,
4739 so now the code just undefines EX_OK before #including unistd.h.
4741 PH/06 There is a timeout for writing blocks of data, set by, e.g. data_timeout
4742 in the smtp transport. When a block could not be written in a single
4743 write() function, the timeout was being re-applied to each part-write.
4744 This seems wrong - if the receiver was accepting one byte at a time it
4745 would take for ever. The timeout is now adjusted when this happens. It
4746 doesn't have to be particularly precise.
4748 TK/04 Added simple SPF lookup method in EXPERIMENTAL_SPF. See NewStuff for
4749 details. Thanks to Chris Webb <chris@arachsys.com> for the patch!
4751 PH/07 Added "fullpostmaster" verify option, which does a check to <postmaster>
4752 without a domain if the check to <postmaster@domain> fails.
4754 SC/01 Eximstats: added -xls and the ability to specify output files
4755 (patch written by Frank Heydlauf).
4757 SC/02 Eximstats: use FileHandles for outputting results.
4759 SC/03 Eximstats: allow any combination of xls, txt, and html output.
4761 SC/04 Eximstats: fixed display of large numbers with -nvr option
4763 SC/05 Eximstats: fixed merging of reports with empty tables.
4765 SC/06 Eximstats: added the -include_original_destination flag
4767 SC/07 Eximstats: removed tabs and trailing whitespace.
4769 TK/05 Malware: Improve on aveserver error handling. Patch from Alex Miller.
4771 TK/06 MBOX spool code: Add real "From " MBOX separator line
4772 so the .eml file is really in mbox format (even though
4773 most programs do not really care). Patch from Alex Miller.
4775 TK/07 MBOX spool code: Add X-Envelope-From: and X-Envelope-To: headers.
4776 The latter is generated from $received_to and is only set if the
4777 message has one envelope recipient. SA can use these headers,
4778 obviously out-of-the-box. Patch from Alex Miller.
4780 PH/08 The ${def test on a variable was returning false if the variable's
4781 value was "0", contrary to what the specification has always said!
4782 The result should be true unless the variable is empty.
4784 PH/09 The syntax error of a character other than { following "${if
4785 def:variable_name" (after optional whitespace) was not being diagnosed.
4786 An expansion such as ${if def:sender_ident:{xxx}{yyy}} in which an
4787 accidental colon was present, for example, could give incorrect results.
4789 PH/10 Tidied the code in a number of places where the st_size field of a stat()
4790 result is used (not including appendfile, where other changes are about
4793 PH/11 Upgraded appendfile so that quotas larger than 2G are now supported.
4794 This involved changing a lot of size variables from int to off_t. It
4795 should work with maildirs and everything.
4797 TK/08 Apply fix provided by Michael Haardt to prevent deadlock in case of
4798 spamd dying while we are connected to it.
4800 TF/05 Fixed a ${extract error message typo reported by Jeremy Harris
4803 PH/12 Applied Alex Kiernan's patch for the API change for the error callback
4804 function for BDB 4.3.
4806 PH/13 Changed auto_thaw such that it does not apply to bounce messages.
4808 PH/14 Imported PCRE 6.0; this was more than just a trivial operation because
4809 the sources for PCRE have been re-arranged and more files are now
4812 PH/15 The code I had for printing potentially long long variables in PH/11
4813 above was not the best (it lost precision). The length of off_t variables
4814 is now inspected at build time, and an appropriate printing format (%ld
4815 or %lld) is chosen and #defined by OFF_T_FMT. We also define LONGLONG_T
4816 to be "long long int" or "long int". This is needed for the internal
4817 formatting function string_vformat().
4819 PH/16 Applied Matthew Newton's patch to exicyclog: "If log_file_path is set in
4820 the configuration file to be ":syslog", then the script "guesses" where
4821 the logs files are, rather than using the compiled in default. In our
4822 case the guess is not the same as the compiled default, so the script
4823 suddenly stopped working when I started to use syslog. The patch checks
4824 to see if log_file_path is "". If so, it attempts to read it from exim
4825 with no configuration file to get the compiled in version, before it
4826 falls back to the previous guessing code."
4828 TK/09 Added "prvs" and "prvscheck" expansion items. These help a lot with
4829 implementing BATV in an Exim configuration. See NewStuff for the gory
4832 PH/17 Applied Michael Haardt's patch for HP-UX, affecting only the os.h and
4833 Makefile that are specific to HP-UX.
4835 PH/18 If the "use_postmaster" option was set for a recipient callout together
4836 with the "random" option, the postmaster address was used as the MAIL
4837 FROM address for the random test, but not for the subsequent recipient
4838 test. It is now used for both.
4840 PH/19 Applied Michael Haardt's patch to update Sieve to RFC3028bis. "The
4841 patch removes a few documentation additions to RFC 3028, because the
4842 latest draft now contains them. It adds the new en;ascii-case comparator
4843 and a new error check for 8bit text in MIME parts. Comparator and
4844 require names are now matched exactly. I enabled the subaddress
4845 extension, but it is not well tested yet (read: it works for me)."
4847 PH/20 Added macros for time_t as for off_t (see PH/15 above) and used them to
4848 rework some of the code of TK/09 above to avoid the hardwired use of
4849 "%lld" and "long long". Replaced the call to snprintf() with a call to
4852 PH/21 Added some other messages to those in 4.51/PH/42, namely "All relevant MX
4853 records point to non-existent hosts", "retry timeout exceeded", and
4854 "retry time not reached for any host after a long failure period".
4856 PH/22 Fixed some oversights/typos causing bugs when Exim is compiled with
4857 experimental DomainKeys support:
4859 (1) The filter variables $n0-$n9 and $sn0-$sn9 were broken.
4860 (2) On an error such as an illegally used "control", the wrong name for
4861 the control was given.
4863 These problems did NOT occur unless DomainKeys support was compiled.
4865 PH/23 Added daemon_startup_retries and daemon_startup_sleep.
4867 PH/24 Added ${if match_ip condition.
4869 PH/25 Put debug statements on either side of calls to EXIM_DBOPEN() for hints
4870 databases so that it will be absolutely obvious if a crash occurs in the
4871 DB library. This is a regular occurrence (often caused by mis-matched
4874 PH/26 Insert a lot of missing (void) casts for functions such as chown(),
4875 chmod(), fcntl(), sscanf(), and other functions from stdio.h. These were
4876 picked up on a user's system that detects such things. There doesn't seem
4877 to be a gcc warning option for this - only an attribute that has to be
4878 put on the function's prototype. It seems that in Fedora Core 4 they have
4879 set this on a number of new functions. No doubt there will be more in due
4882 PH/27 If a dnslookup or manualroute router is set with verify=only, it need not
4883 specify a transport. However, if an address that was verified by such a
4884 router was the subject of a callout, Exim crashed because it tried to
4885 read the rcpt_include_affixes from the non-existent transport. Now it
4886 just assumes that the setting of that option is false. This bug was
4887 introduced by 4.51/PH/31.
4889 PH/28 Changed -d+all to exclude +memory, because that information is very
4890 rarely of interest, but it makes the output a lot bigger. People tend to
4891 do -d+all out of habit.
4893 PH/29 Removed support for the Linux-libc5 build, as it is obsolete and the
4894 code in os-type was giving problems when libc.so lives in lib64, like on
4897 PH/30 Exim's DNS code uses the original T_xxx names for DNS record times. These
4898 aren't the modern standard, and it seems that some systems' include files
4899 don't always have them. Exim was already checking for some of the newer
4900 ones like T_AAAA, and defining it itself. I've added checks for all the
4901 record types that Exim uses.
4903 PH/31 When using GnuTLS, if the parameters cache file did not exist, Exim was
4904 not automatically generating a new one, as it is supposed to. This
4905 prevented TLS from working. If the file did exist, but contained invalid
4906 data, a new version was generated, as expected. It was only the case of a
4907 non-existent file that was broken.
4909 TK/10 Domainkeys: Fix a bug in verification that caused a crash in conjunction
4910 with a change in libdomainkeys > 0.64.
4912 TK/11 Domainkeys: Change the logic how the "testing" policy flag is retrieved
4913 from DNS. If the selector record carries the flag, it now has
4914 precedence over the domain-wide flag.
4916 TK/12 Cleared some compiler warnings related to SPF, SRS and DK code.
4918 PH/32 In mua_wrapper mode, if an smtp transport configuration error (such as
4919 the use of a port name that isn't defined in /etc/services) occurred, the
4920 message was deferred as in a normal delivery, and thus remained on the
4921 spool, instead of being failed because of the mua_wrapper setting. This
4922 is now fixed, and I tidied up some of the mua_wrapper messages at the
4925 SC/08 Eximstats: whilst parsing the mainlog(s), store information about
4926 the messages in a hash of arrays rather than using individual hashes.
4927 This is a bit cleaner and results in dramatic memory savings, albeit
4928 at a slight CPU cost.
4930 SC/09 Eximstats: added the -show_rt<list> and the -show_dt<list> flags
4931 as requested by Marc Sherman.
4933 SC/10 Eximstats: added histograms for user specified patterns as requested
4936 SC/11 Eximstats: v1.43 - bugfix for pattern histograms with -h0 specified.
4938 PH/33 Patch from the Cygwin maintainer to add "b" to all occurences of
4939 fopen() in the content-scanning modules that did not already have it.
4945 TK/01 Added Yahoo DomainKeys support via libdomainkeys. See
4946 doc/experimental-spec.txt for details. (http://domainkeys.sf.net)
4948 TK/02 Fix ACL "control" statement not being available in MIME ACL.
4950 TK/03 Fix ACL "regex" condition not being available in MIME ACL.
4952 PH/01 Installed a patch from the Sieve maintainer that allows -bf to be used
4953 to test Sieve filters that use "vacation".
4955 PH/02 Installed a slightly modified version of Nikos Mavrogiannopoulos' patch
4956 that changes the way the GnuTLS parameters are stored in the cache file.
4957 The new format can be generated externally. For backward compatibility,
4958 if the data in the cache doesn't make sense, Exim assumes it has read an
4959 old-format file, and it generates new data and writes a new file. This
4960 means that you can't go back to an older release without removing the
4963 PH/03 A redirect router that has both "unseen" and "one_time" set does not
4964 work if there are any delivery delays because "one_time" forces the
4965 parent to be marked "delivered", so its unseen clone is never tried
4966 again. For this reason, Exim now forbids the simultaneous setting of
4969 PH/04 Change 4.11/85 fixed an obscure bug concerned with addresses that are
4970 redirected to themselves ("homonym" addresses). Read the long ChangeLog
4971 entry if you want to know the details. The fix, however, neglected to
4972 consider the case when local delivery batching is involved. The test for
4973 "previously delivered" was not happening when checking to see if an
4974 address could be batched with a previous (undelivered) one; under
4975 certain circumstances this could lead to multiple deliveries to the same
4978 PH/05 Renamed the macro SOCKLEN_T as EXIM_SOCKLEN_T because AIX uses SOCKLEN_T
4979 in its include files, and this causes problems building Exim.
4981 PH/06 A number of "verify =" ACL conditions have no options (e.g. verify =
4982 header_syntax) but Exim was just ignoring anything given after a slash.
4983 In particular, this caused confusion with an attempt to use "verify =
4984 reverse_host_lookup/defer_ok". An error is now given when options are
4985 supplied for verify items that do not have them. (Maybe reverse_host_
4986 lookup should have a defer_ok option, but that's a different point.)
4988 PH/07 Increase the size of the buffer for incoming SMTP commands from 512 (as
4989 defined by RFC 821) to 2048, because there were problems with some AUTH
4990 commands, and RFC 1869 says the size should be increased for extended
4991 SMTP commands that take arguments.
4993 PH/08 Added ${dlfunc dynamically loaded function for expansion (code from Tony
4996 PH/09 Previously, an attempt to use ${perl when it wasn't compiled gave an
4997 "unknown" error; now it says that the functionality isn't in the binary.
4999 PH/10 Added a nasty fudge to try to recognize and flatten LDAP passwords in
5000 an address' error message when a string expansion fails (syntax or
5001 whatever). Otherwise the password may appear in the log. Following change
5002 PH/42 below, there is no longer a chance of it appearing in a bounce
5005 PH/11 Installed exipick version 20050225.0 from John Jetmore.
5007 PH/12 If the last host in a fallback_hosts list was multihomed, only the first
5008 of its addresses was ever tried. (Bugzilla bug #2.)
5010 PH/13 If "headers_add" in a transport didn't end in a newline, Exim printed
5011 the result incorrectly in the debug output. (It correctly added a newline
5012 to what was transported.)
5014 TF/01 Added $received_time.
5016 PH/14 Modified the default configuration to add an acl_smtp_data ACL, with
5017 commented out examples of how to interface to a virus scanner and to
5018 SpamAssassin. Also added commented examples of av_scanner and
5019 spamd_address settings.
5021 PH/15 Further to TK/02 and TK/03 above, tidied up the tables of what conditions
5022 and controls are allowed in which ACLs. There were a couple of minor
5023 errors. Some of the entries in the conditions table (which is a table of
5024 where they are NOT allowed) were getting very unwieldy; rewrote them as a
5025 negation of where the condition IS allowed.
5027 PH/16 Installed updated OS/os.c-cygwin from the Cygwin maintainer.
5029 PH/17 The API for radiusclient changed at release 0.4.0. Unfortunately, the
5030 header file does not have a version number, so I've had to invent a new
5031 value for RADIUS_LIB_TYPE, namely "RADIUSCLIENTNEW" to request the new
5032 API. The code is untested by me (my Linux distribution still has 0.3.2 of
5033 radiusclient), but it was contributed by a Radius user.
5035 PH/18 Installed Lars Mainka's patch for the support of CRL collections in
5036 files or directories, for OpenSSL.
5038 PH/19 When an Exim process that is running as root has to create an Exim log
5039 file, it does so in a subprocess that runs as exim:exim so as to get the
5040 ownership right at creation (otherwise, other Exim processes might see
5041 the file with the wrong ownership). There was no test for failure of this
5042 fork() call, which would lead to the process getting stuck as it waited
5043 for a non-existent subprocess. Forks do occasionally fail when resources
5044 run out. I reviewed all the other calls to fork(); they all seem to check
5047 PH/20 When checking for unexpected SMTP input at connect time (before writing
5048 the banner), Exim was not dealing correctly with a non-positive return
5049 from the read() function. If the client had disconnected by this time,
5050 the result was a log entry for a synchronization error with an empty
5051 string after "input=" when read() returned zero. If read() returned -1
5052 (an event I could not check), uninitialized data bytes were printed.
5053 There were reports of junk text (parts of files, etc) appearing after
5056 PH/21 Added acl_not_smtp_mime to allow for MIME scanning for non-SMTP messages.
5058 PH/22 Added support for macro redefinition, and (re)definition in between
5059 driver and ACL definitions.
5061 PH/23 The cyrus_sasl authenticator was expanding server_hostname, but then
5062 forgetting to use the resulting value; it was using the unexpanded value.
5064 PH/24 The cyrus_sasl authenticator was advertising mechanisms for which it
5065 hadn't been configured. The fix is from Juergen Kreileder, who
5066 understands it better than I do:
5068 "Here's what I see happening with three configured cyrus_sasl
5069 authenticators configured (plain, login, cram-md5):
5071 On startup auth_cyrus_sasl_init() gets called for each of these.
5072 This means three calls to sasl_listmech() without a specified mech_list.
5073 => SASL tests which mechs of all available mechs actually work
5074 => three warnings about OTP not working
5075 => the returned list contains: plain, login, cram-md5, digest-md5, ...
5077 With the patch, sasl_listmech() also gets called three times. But now
5078 SASL's mech_list option is set to the server_mech specified in the the
5079 authenticator. Or in other words, the answer from sasl_listmech()
5080 gets limited to just the mech you're testing for (which is different
5082 => the return list contains just 'plain' or 'login', 'cram-md5' or
5083 nothing depending on the value of ob->server_mech.
5085 I've just tested the patch: Authentication still works fine,
5086 unavailable mechs specified in the exim configuration are still
5087 caught, and the auth.log warnings about OTP are gone."
5089 PH/25 When debugging is enabled, the contents of the command line are added
5090 to the debugging output, even when log_selector=+arguments is not
5093 PH/26 Change scripts/os-type so that when "uname -s" returns just "GNU", the
5094 answer is "GNU", and only if the return is "GNU/something" is the answer
5097 PH/27 $acl_verify_message is now set immediately after the failure of a
5098 verification in an ACL, and so is available in subsequent modifiers. In
5099 particular, the message can be preserved by coding like this:
5101 warn !verify = sender
5102 set acl_m0 = $acl_verify_message
5104 Previously, $acl_verify_message was set only while expanding "message"
5105 and "log_message" when a very denied access.
5107 PH/28 Modified OS/os.c-Linux with
5109 -#ifndef OS_LOAD_AVERAGE
5110 +#if !defined(OS_LOAD_AVERAGE) && defined(__linux__)
5112 to make Exim compile on kfreebsd-gnu. (I'm totally confused about the
5113 nomenclature these days.)
5115 PH/29 Installed patch from the Sieve maintainer that adds the options
5116 sieve_useraddress and sieve_subaddress to the redirect router.
5118 PH/30 In these circumstances:
5119 . Two addresses routed to the same list of hosts;
5120 . First host does not offer TLS;
5121 . First host accepts first address;
5122 . First host gives temporary error to second address;
5123 . Second host offers TLS and a TLS session is established;
5124 . Second host accepts second address.
5125 Exim incorrectly logged both deliveries with the TLS parameters (cipher
5126 and peerdn, if requested) that were in fact used only for the second
5129 PH/31 When doing a callout as part of verifying an address, Exim was not paying
5130 attention to any local part prefix or suffix that was matched by the
5131 router that accepted the address. It now behaves in the same way as it
5132 does for delivery: the affixes are removed from the local part unless
5133 rcpt_include_affixes is set on the transport.
5135 PH/32 Add the sender address, as F=<...>, to the log line when logging a
5136 timeout during the DATA phase of an incoming message.
5138 PH/33 Sieve envelope tests were broken for match types other than :is. I have
5139 applied a patch sanctioned by the Sieve maintainer.
5141 PH/34 Change 4.50/80 broke Exim in that it could no longer handle cases where
5142 the uid or gid is negative. A case of a negative gid caused this to be
5143 noticed. The fix allows for either to be negative.
5145 PH/35 ACL_WHERE_MIME is now declared unconditionally, to avoid too much code
5146 clutter, but the tables that are indexed by ACL_WHERE_xxx values had been
5149 PH/36 The change PH/12 above was broken. Fixed it.
5151 PH/37 Exim used to check for duplicate addresses in the middle of routing, on
5152 the grounds that routing the same address twice would always produce the
5153 same answer. This might have been true once, but it is certainly no
5154 longer true now. Routing a child address may depend on the previous
5155 routing that produced that child. Some complicated redirection strategies
5156 went wrong when messages had multiple recipients, and made Exim's
5157 behaviour dependent on the order in which the addresses were given.
5159 I have moved the duplicate checking until after the routing is complete.
5160 Exim scans the addresses that are assigned to local and remote
5161 transports, and removes any duplicates. This means that more work will be
5162 done, as duplicates will always all be routed, but duplicates are
5163 presumably rare, so I don't expect this is of any significance.
5165 For deliveries to pipes, files, and autoreplies, the duplicate checking
5166 still happens during the routing process, since they are not going to be
5169 PH/38 Installed a patch from Ian Freislich, with the agreement of Tom Kistner.
5170 It corrects a timeout issue with spamd. This is Ian's comment: "The
5171 background is that sometimes spamd either never reads data from a
5172 connection it has accepted, or it never writes response data. The exiscan
5173 spam.[ch] uses a 3600 second timeout on spamd socket reads, further, it
5174 blindly assumes that writes won't block so it may never time out."
5176 PH/39 Allow G after quota size as well as K and M.
5178 PH/40 The value set for $authenticated_id in an authenticator may not contain
5179 binary zeroes or newlines because the value is written to log lines and
5180 to spool files. There was no check on this. Now the value is run through
5181 the string_printing() function so that such characters are converted to
5182 printable escape sequences.
5184 PH/41 $message_linecount is a new variable that contains the total number of
5185 lines in the message. Compare $body_linecount, which is the count for the
5188 PH/42 Exim no longer gives details of delivery errors for specific addresses in
5189 bounce and delay warning messages, except in certain special cases, which
5192 (a) An SMTP error message from a remote host;
5193 (b) A message specified in a :fail: redirection;
5194 (c) A message specified in a "fail" command in a system filter;
5195 (d) A message specified in a FAIL return from the queryprogram router;
5196 (e) A message specified by the cannot_route_message router option.
5198 In these cases only, Exim does include the error details in bounce and
5199 warning messages. There are also a few cases where bland messages such
5200 as "unrouteable address" or "local delivery error" are given.
5202 PH/43 $value is now also set for the "else" part of a ${run expansion.
5204 PH/44 Applied patch from the Sieve maintainer: "The vacation draft is still
5205 being worked on, but at least Exim now implements the latest version to
5208 PH/45 In a pipe transport, although a timeout while waiting for the pipe
5209 process to complete was treated as a delivery failure, a timeout while
5210 writing the message to the pipe was logged, but erroneously treated as a
5211 successful delivery. Such timeouts include transport filter timeouts. For
5212 consistency with the overall process timeout, these timeouts are now
5213 treated as errors, giving rise to delivery failures by default. However,
5214 there is now a new Boolean option for the pipe transport called
5215 timeout_defer, which, if set TRUE, converts the failures into defers for
5216 both kinds of timeout. A transport filter timeout is now identified in
5219 PH/46 The "scripts/Configure-config.h" script calls "make" at one point. On
5220 systems where "make" and "gmake" are different, calling "gmake" at top
5221 level broke things. I've arranged for the value of $(MAKE) to be passed
5222 from the Makefile to this script so that it can call the same version of
5226 A note about Exim versions 4.44 and 4.50
5227 ----------------------------------------
5229 Exim 4.50 was meant to be the next release after 4.43. It contains a lot of
5230 changes of various kinds. As a consequence, a big documentation update was
5231 needed. This delayed the release for rather longer than seemed good, especially
5232 in the light of a couple of (minor) security issues. Therefore, the changes
5233 that fixed bugs were backported into 4.43, to create a 4.44 maintenance
5234 release. So 4.44 and 4.50 are in effect two different branches that both start
5237 I have left the 4.50 change log unchanged; it contains all the changes since
5238 4.43. The change log for 4.44 is below; many of its items are identical to
5239 those for 4.50. This seems to be the most sensible way to preserve the
5240 historical information.
5246 1. Minor wording change to the doc/README.SIEVE file.
5248 2. Change 4.43/35 introduced a bug: if quota_filecount was set, the
5249 computation of the current number of files was incorrect.
5251 3. Closing a stable door: arrange to panic-die if setitimer() ever fails. The
5252 bug fixed in 4.43/37 would have been diagnosed quickly if this had been in
5255 4. Give more explanation in the error message when the command for a transport
5256 filter fails to execute.
5258 5. There are several places where Exim runs a non-Exim command in a
5259 subprocess. The SIGUSR1 signal should be disabled for these processes. This
5260 was being done only for the command run by the queryprogram router. It is
5261 now done for all such subprocesses. The other cases are: ${run, transport
5262 filters, and the commands run by the lmtp and pipe transports.
5264 6. Added CONFIGURE_GROUP build-time option.
5266 7. Some older OS have a limit of 256 on the maximum number of file
5267 descriptors. Exim was using setrlimit() to set 1000 as a large value
5268 unlikely to be exceeded. Change 4.43/17 caused a lot of logging on these
5269 systems. I've change it so that if it can't get 1000, it tries for 256.
5271 8. "control=submission" was allowed, but had no effect, in a DATA ACL. This
5272 was an oversight, and furthermore, ever since the addition of extra
5273 controls (e.g. 4.43/32), the checks on when to allow different forms of
5274 "control" were broken. There should now be diagnostics for all cases when a
5275 control that does not make sense is encountered.
5277 9. Added the /retain_sender option to "control=submission".
5279 10. $recipients is now available in the predata ACL (oversight).
5281 11. Tidy the search cache before the fork to do a delivery from a message
5282 received from the command line. Otherwise the child will trigger a lookup
5283 failure and thereby defer the delivery if it tries to use (for example) a
5284 cached ldap connection that the parent has called unbind on.
5286 12. If verify=recipient was followed by verify=sender in a RCPT ACL, the value
5287 of $address_data from the recipient verification was clobbered by the
5288 sender verification.
5290 13. The value of address_data from a sender verification is now available in
5291 $sender_address_data in subsequent conditions in the ACL statement.
5293 14. Added forbid_sieve_filter and forbid_exim_filter to the redirect router.
5295 15. Added a new option "connect=<time>" to callout options, to set a different
5298 16. If FIXED_NEVER_USERS was defined, but empty, Exim was assuming the uid 0
5299 was its contents. (It was OK if the option was not defined at all.)
5301 17. A "Completed" log line is now written for messages that are removed from
5302 the spool by the -Mrm option.
5304 18. New variables $sender_verify_failure and $recipient_verify_failure contain
5305 information about exactly what failed.
5307 19. Added -dd to debug only the daemon process.
5309 20. Incorporated Michael Haardt's patch to ldap.c for improving the way it
5310 handles timeouts, both on the server side and network timeouts. Renamed the
5311 CONNECT parameter as NETTIMEOUT (but kept the old name for compatibility).
5313 21. The rare case of EHLO->STARTTLS->HELO was setting the protocol to "smtp".
5314 It is now set to "smtps".
5316 22. $host_address is now set to the target address during the checking of
5317 ignore_target_hosts.
5319 23. When checking ignore_target_hosts for an ipliteral router, no host name was
5320 being passed; this would have caused $sender_host_name to have been used if
5321 matching the list had actually called for a host name (not very likely,
5322 since this list is usually IP addresses). A host name is now passed as
5325 24. Changed the calls that set up the SIGCHLD handler in the daemon to use the
5326 code that specifies a non-restarting handler (typically sigaction() in
5327 modern systems) in an attempt to fix a rare and obscure crash bug.
5329 25. Narrowed the window for a race in the daemon that could cause it to ignore
5330 SIGCHLD signals. This is not a major problem, because they are used only to
5331 wake it up if nothing else does.
5333 26. A malformed maildirsize file could cause Exim to calculate negative values
5334 for the mailbox size or file count. Odd effects could occur as a result.
5335 The maildirsize information is now recalculated if the size or filecount
5338 27. Added HAVE_SYS_STATVFS_H to the os.h file for Linux, as it has had this
5339 support for a long time. Removed HAVE_SYS_VFS_H.
5341 28. Installed the latest version of exipick from John Jetmore.
5343 29. In an address list, if the pattern was not a regular expression, an empty
5344 subject address (from a bounce message) matched only if the pattern was an
5345 empty string. Non-empty patterns were not even tested. This was the wrong
5346 because it is perfectly reasonable to use an empty address as part of a
5347 database query. An empty address is now tested by patterns that are
5348 lookups. However, all the other forms of pattern expect the subject to
5349 contain a local part and a domain, and therefore, for them, an empty
5350 address still always fails if the pattern is not itself empty.
5352 30. Exim went into a mad DNS loop when attempting to do a callout where the
5353 host was specified on an smtp transport, and looking it up yielded more
5354 than one IP address.
5356 31. Re-factored the code for checking spool and log partition space into a
5357 function that finds that data and another that does the check. The former
5358 is then used to implement four new variables: $spool_space, $log_space,
5359 $spool_inodes, and $log_inodes.
5361 32. The RFC2047 encoding function was originally intended for short strings
5362 such as real names; it was not keeping to the 75-character limit for
5363 encoded words that the RFC imposes. It now respects the limit, and
5364 generates multiple encoded words if necessary. To be on the safe side, I
5365 have increased the buffer size for the ${rfc2047: expansion operator from
5368 33. It is now permitted to omit both strings after an "if" condition; if the
5369 condition is true, the result is "true". As before, when the second string
5370 is omitted, a false condition yields an empty string. This makes it less
5371 cumbersome to write custom ACL and router conditions.
5373 34. Failure to deliver a bounce message always caused it to be frozen, even if
5374 there was an errors_to setting on the router. The errors_to setting is now
5377 35. If an IPv6 address is given for -bh or -bhc, it is now converted to the
5378 canonical form (fully expanded) before being placed in
5379 $sender_host_address.
5381 36. The table in the code that translates DNS record types into text (T_A to
5382 "A" for instance) was missing entries for NS and CNAME. It is just possible
5383 that this could have caused confusion if both these types were looked up
5384 for the same domain, because the text type is used as part of Exim's
5385 per-process caching. But the chance of anyone hitting this buglet seems
5388 37. The dnsdb lookup has been extended in a number of ways.
5390 (1) There is a new type, "zns", which walks up the domain tree until it
5391 finds some nameserver records. It should be used with care.
5393 (2) There is a new type, "mxh", which is like "mx" except that it returns
5394 just the host names, not the priorities.
5396 (3) It is now possible to give a list of domains (or IP addresses) to be
5397 looked up. The behaviour when one of the lookups defers can be
5398 controlled by a keyword.
5400 (4) It is now possible to specify the separator character for use when
5401 multiple records are returned.
5403 38. The dnslists ACL condition has been extended: it is now possible to supply
5404 a list of IP addresses and/or domains to be looked up in a particular DNS
5407 39. Added log_selector=+queue_time_overall.
5409 40. When running the queue in the test harness, wait just a tad after forking a
5410 delivery process, to get repeatability of debugging output.
5412 41. Include certificate and key file names in error message when GnuTLS fails
5413 to set them up, because the GnuTLS error message doesn't include the name
5414 of the failing file when there is a problem reading it.
5416 42. Allow both -bf and -bF in the same test run.
5418 43. Did the same fix as 41 above for OpenSSL, which had the same infelicity.
5420 44. The "Exiscan patch" is now merged into the mainline Exim source.
5422 45. Sometimes the final signoff response after QUIT could fail to get
5423 transmitted in the non-TLS case. Testing !tls_active instead of tls_active
5424 < 0 before doing a fflush(). This bug looks as though it goes back to the
5425 introduction of TLS in release 3.20, but "sometimes" must have been rare
5426 because the tests only now provoked it.
5428 46. Reset the locale to "C" after calling embedded Perl, in case it was changed
5429 (this can affect the format of dates).
5431 47. exim_tidydb, when checking for the continued existence of a message for
5432 which it has found a message-specific retry record, was not finding
5433 messages that were in split spool directories. Consequently, it was
5434 deleting retry records that should have stayed in existence.
5436 48. Steve fixed some bugs in eximstats.
5438 49. The SPA authentication driver was not abandoning authentication and moving
5439 on to the next authenticator when an expansion was forced to fail,
5440 contradicting the general specification for all authenticators. Instead it
5441 was generating a temporary error. It now behaves as specified.
5443 50. The default ordering of permitted cipher suites for GnuTLS was pessimal
5444 (the order specifies the preference for clients). The order is now AES256,
5445 AES128, 3DES, ARCFOUR128.
5447 51. Small patch to Sieve code - explicitly set From: when generating an
5450 52. Exim crashed if a remote delivery caused a very long error message to be
5451 recorded - for instance if somebody sent an entire SpamAssassin report back
5452 as a large number of 550 error lines. This bug was coincidentally fixed by
5453 increasing the size of one of Exim's internal buffers (big_buffer) that
5454 happened as part of the Exiscan merge. However, to be on the safe side, I
5455 have made the code more robust (and fixed the comments that describe what
5458 53. Now that there can be additional text after "Completed" in log lines (if
5459 the queue_time_overall log selector is set), a one-byte patch to exigrep
5460 was needed to allow it to recognize "Completed" as not the last thing in
5463 54. The LDAP lookup was not handling a return of LDAP_RES_SEARCH_REFERENCE. A
5464 patch that reportedly fixes this has been added. I am not expert enough to
5465 create a test for it. This is what the patch creator wrote:
5467 "I found a little strange behaviour of ldap code when working with
5468 Windows 2003 AD Domain, where users was placed in more than one
5469 Organization Units. When I tried to give exim partial DN, the exit code
5470 of ldap_search was unknown to exim because of LDAP_RES_SEARCH_REFERENCE.
5471 But simultaneously result of request was absolutely normal ldap result,
5472 so I produce this patch..."
5474 Later: it seems that not all versions of LDAP support LDAP_RES_SEARCH_
5475 REFERENCE, so I have modified the code to exclude the patch when that macro
5478 55. Some experimental protocols are using DNS PTR records for new purposes. The
5479 keys for these records are domain names, not reversed IP addresses. The
5480 dnsdb PTR lookup now tests whether its key is an IP address. If not, it
5481 leaves it alone. Component reversal etc. now happens only for IP addresses.
5484 56. Improve error message when ldap_search() fails in OpenLDAP or Solaris LDAP.
5486 57. Double the size of the debug message buffer (to 2048) so that more of very
5487 long debug lines gets shown.
5489 58. The exicyclog utility now does better if the number of log files to keep
5490 exceeds 99. In this case, it numbers them 001, 002 ... instead of 01, 02...
5492 59. Two changes related to the smtp_active_hostname option:
5494 (1) $smtp_active_hostname is now available as a variable.
5495 (2) The default for smtp_banner uses $smtp_active_hostname instead
5496 of $primary_hostname.
5498 60. The host_aton() function is supposed to be passed a string that is known
5499 to be a valid IP address. However, in the case of IPv6 addresses, it was
5500 not checking this. This is a hostage to fortune. Exim now panics and dies
5501 if the condition is not met. A case was found where this could be provoked
5502 from a dnsdb PTR lookup with an IPv6 address that had more than 8
5503 components; fortuitously, this particular loophole had already been fixed
5504 by change 4.50/55 above.
5506 If there are any other similar loopholes, the new check in host_aton()
5507 itself should stop them being exploited. The report I received stated that
5508 data on the command line could provoke the exploit when Exim was running as
5509 exim, but did not say which command line option was involved. All I could
5510 find was the use of -be with a bad dnsdb PTR lookup, and in that case it is
5511 running as the user.
5514 61. There was a buffer overflow vulnerability in the SPA authentication code
5515 (which came originally from the Samba project). I have added a test to the
5516 spa_base64_to_bits() function which I hope fixes it.
5519 62. Configuration update for GNU/Hurd and variations. Updated Makefile-GNU and
5520 os.h-GNU, and added configuration files for GNUkFreeBSD and GNUkNetBSD.
5522 63. The daemon start-up calls getloadavg() while still root for those OS that
5523 need the first call to be done as root, but it missed one case: when
5524 deliver_queue_load_max is set with deliver_drop_privilege. This is
5525 necessary for the benefit of the queue runner, because there is no re-exec
5526 when deliver_drop_privilege is set.
5528 64. A call to exiwhat cut short delays set up by "delay" modifiers in ACLs.
5529 This has been fixed.
5531 65. Caching of lookup data for "hosts =" ACL conditions, when a named host list
5532 was in use, was not putting the data itself into the right store pool;
5533 consequently, it could be overwritten for a subsequent message in the same
5534 SMTP connection. (Fix 4.40/11 dealt with the non-cache case, but overlooked
5537 66. Added hosts_max_try_hardlimit to the smtp transport, default 50.
5539 67. The string_is_ip_address() function returns 0, 4, or 6, for "no an IP
5540 address", "IPv4 address", and "IPv6 address", respectively. Some calls of
5541 the function were treating the return as a boolean value, which happened to
5542 work because 0=false and not-0=true, but is not correct code.
5544 68. The host_aton() function was not handling scoped IPv6 addresses (those
5545 with, for example, "%eth0" on the end) correctly.
5547 69. Fixed some compiler warnings in acl.c for the bitmaps specified with
5548 negated items (that is, ~something) in unsigned ints. Some compilers
5549 apparently mutter when there is no cast.
5551 70. If an address verification called from an ACL failed, and did not produce a
5552 user-specific message (i.e. there was only a "system" message), nothing was
5553 put in $acl_verify_message. In this situation, it now puts the system
5556 71. Change 4.23/11 added synchronization checking at the start of an SMTP
5557 session; change 4.31/43 added the unwanted input to the log line - except
5558 that it did not do this in the start of session case. It now does.
5560 72. After a timeout in a callout SMTP session, Exim still sent a QUIT command.
5561 This is wrong and can cause the other end to generate a synchronization
5562 error if it is another Exim or anything else that does the synchronization
5563 check. A QUIT command is no longer sent after a timeout.
5565 73. $host_lookup_deferred has been added, to make it easier to detect DEFERs
5566 during host lookups.
5568 74. The defer_ok option of callout verification was not working if it was used
5569 when verifying addresses in header lines, that is, for this case:
5571 verify = header_sender/callout=defer_ok
5573 75. A backgrounded daemon closed stdin/stdout/stderr on entry; this meant that
5574 those file descriptors could be used for SMTP connections. If anything
5575 wrote to stderr (the example that came up was "warn" in embedded Perl), it
5576 could be sent to the SMTP client, causing chaos. The daemon now opens
5577 stdin, stdout, and stderr to /dev/null when it puts itself into the
5580 76. Arrange for output from Perl's "warn" command to be written to Exim's main
5581 log by default. The user can override this with suitable Perl magic.
5583 77. The use of log_message on a "discard" ACL verb, which is supposed to add to
5584 the log message when discard triggers, was not working for the DATA ACL or
5585 for the non-SMTP ACL.
5587 78. Error message wording change in sieve.c.
5589 79. If smtp_accept_max_per_host was set, the number of connections could be
5590 restricted to fewer than expected, because the daemon was trying to set up
5591 a new connection before checking whether the processes handling previous
5592 connections had finished. The check for completed processes is now done
5593 earlier. On busy systems, this bug wouldn't be noticed because something
5594 else would have woken the daemon, and it would have reaped the completed
5597 80. If a message was submitted locally by a user whose login name contained one
5598 or more spaces (ugh!), the spool file that Exim wrote was not re-readable.
5599 It caused a spool format error. I have fixed the spool reading code. A
5600 related problem was that the "from" clause in the Received: line became
5601 illegal because of the space(s). It is now covered by ${quote_local_part.
5603 81. Included the latest eximstats from Steve (adds average sizes to HTML Top
5606 82. Updated OS/Makefile-AIX as per message from Mike Meredith.
5608 83. Patch from Sieve maintainer to fix unterminated string problem in
5609 "vacation" handling.
5611 84. Some minor changes to the Linux configuration files to help with other
5612 OS variants using glibc.
5614 85. One more patch for Sieve to update vacation handling to latest spec.
5617 ----------------------------------------------------
5618 See the note above about the 4.44 and 4.50 releases.
5619 ----------------------------------------------------
5625 1. Change 4.43/35 introduced a bug that caused file counts to be
5626 incorrectly computed when quota_filecount was set in an appendfile
5629 2. Closing a stable door: arrange to panic-die if setitimer() ever fails. The
5630 bug fixed in 4.43/37 would have been diagnosed quickly if this had been in
5633 3. Give more explanation in the error message when the command for a transport
5634 filter fails to execute.
5636 4. There are several places where Exim runs a non-Exim command in a
5637 subprocess. The SIGUSR1 signal should be disabled for these processes. This
5638 was being done only for the command run by the queryprogram router. It is
5639 now done for all such subprocesses. The other cases are: ${run, transport
5640 filters, and the commands run by the lmtp and pipe transports.
5642 5. Some older OS have a limit of 256 on the maximum number of file
5643 descriptors. Exim was using setrlimit() to set 1000 as a large value
5644 unlikely to be exceeded. Change 4.43/17 caused a lot of logging on these
5645 systems. I've change it so that if it can't get 1000, it tries for 256.
5647 6. "control=submission" was allowed, but had no effect, in a DATA ACL. This
5648 was an oversight, and furthermore, ever since the addition of extra
5649 controls (e.g. 4.43/32), the checks on when to allow different forms of
5650 "control" were broken. There should now be diagnostics for all cases when a
5651 control that does not make sense is encountered.
5653 7. $recipients is now available in the predata ACL (oversight).
5655 8. Tidy the search cache before the fork to do a delivery from a message
5656 received from the command line. Otherwise the child will trigger a lookup
5657 failure and thereby defer the delivery if it tries to use (for example) a
5658 cached ldap connection that the parent has called unbind on.
5660 9. If verify=recipient was followed by verify=sender in a RCPT ACL, the value
5661 of $address_data from the recipient verification was clobbered by the
5662 sender verification.
5664 10. If FIXED_NEVER_USERS was defined, but empty, Exim was assuming the uid 0
5665 was its contents. (It was OK if the option was not defined at all.)
5667 11. A "Completed" log line is now written for messages that are removed from
5668 the spool by the -Mrm option.
5670 12. $host_address is now set to the target address during the checking of
5671 ignore_target_hosts.
5673 13. When checking ignore_target_hosts for an ipliteral router, no host name was
5674 being passed; this would have caused $sender_host_name to have been used if
5675 matching the list had actually called for a host name (not very likely,
5676 since this list is usually IP addresses). A host name is now passed as
5679 14. Changed the calls that set up the SIGCHLD handler in the daemon to use the
5680 code that specifies a non-restarting handler (typically sigaction() in
5681 modern systems) in an attempt to fix a rare and obscure crash bug.
5683 15. Narrowed the window for a race in the daemon that could cause it to ignore
5684 SIGCHLD signals. This is not a major problem, because they are used only to
5685 wake it up if nothing else does.
5687 16. A malformed maildirsize file could cause Exim to calculate negative values
5688 for the mailbox size or file count. Odd effects could occur as a result.
5689 The maildirsize information is now recalculated if the size or filecount
5692 17. Added HAVE_SYS_STATVFS_H to the os.h file for Linux, as it has had this
5693 support for a long time. Removed HAVE_SYS_VFS_H.
5695 18. Updated exipick to current release from John Jetmore.
5697 19. Allow an empty sender to be matched against a lookup in an address list.
5698 Previously the only cases considered were a regular expression, or an
5701 20. Exim went into a mad DNS lookup loop when doing a callout where the
5702 host was specified on the transport, if the DNS lookup yielded more than
5705 21. The RFC2047 encoding function was originally intended for short strings
5706 such as real names; it was not keeping to the 75-character limit for
5707 encoded words that the RFC imposes. It now respects the limit, and
5708 generates multiple encoded words if necessary. To be on the safe side, I
5709 have increased the buffer size for the ${rfc2047: expansion operator from
5712 22. Failure to deliver a bounce message always caused it to be frozen, even if
5713 there was an errors_to setting on the router. The errors_to setting is now
5716 23. If an IPv6 address is given for -bh or -bhc, it is now converted to the
5717 canonical form (fully expanded) before being placed in
5718 $sender_host_address.
5720 24. Updated eximstats to version 1.33
5722 25. Include certificate and key file names in error message when GnuTLS fails
5723 to set them up, because the GnuTLS error message doesn't include the name
5724 of the failing file when there is a problem reading it.
5726 26. Expand error message when OpenSSL has problems setting up cert/key files.
5729 27. Reset the locale to "C" after calling embedded Perl, in case it was changed
5730 (this can affect the format of dates).
5732 28. exim_tidydb, when checking for the continued existence of a message for
5733 which it has found a message-specific retry record, was not finding
5734 messages that were in split spool directories. Consequently, it was
5735 deleting retry records that should have stayed in existence.
5737 29. eximstats updated to version 1.35
5738 1.34 - allow eximstats to parse syslog lines as well as mainlog lines
5739 1.35 - bugfix such that pie charts by volume are generated correctly
5741 30. The SPA authentication driver was not abandoning authentication and moving
5742 on to the next authenticator when an expansion was forced to fail,
5743 contradicting the general specification for all authenticators. Instead it
5744 was generating a temporary error. It now behaves as specified.
5746 31. The default ordering of permitted cipher suites for GnuTLS was pessimal
5747 (the order specifies the preference for clients). The order is now AES256,
5748 AES128, 3DES, ARCFOUR128.
5750 31. Small patch to Sieve code - explicitly set From: when generating an
5753 32. Exim crashed if a remote delivery caused a very long error message to be
5754 recorded - for instance if somebody sent an entire SpamAssassin report back
5755 as a large number of 550 error lines. This bug was coincidentally fixed by
5756 increasing the size of one of Exim's internal buffers (big_buffer) that
5757 happened as part of the Exiscan merge. However, to be on the safe side, I
5758 have made the code more robust (and fixed the comments that describe what
5761 33. Some experimental protocols are using DNS PTR records for new purposes. The
5762 keys for these records are domain names, not reversed IP addresses. The
5763 dnsdb PTR lookup now tests whether its key is an IP address. If not, it
5764 leaves it alone. Component reversal etc. now happens only for IP addresses.
5767 34. The host_aton() function is supposed to be passed a string that is known
5768 to be a valid IP address. However, in the case of IPv6 addresses, it was
5769 not checking this. This is a hostage to fortune. Exim now panics and dies
5770 if the condition is not met. A case was found where this could be provoked
5771 from a dnsdb PTR lookup with an IPv6 address that had more than 8
5772 components; fortuitously, this particular loophole had already been fixed
5773 by change 4.50/55 or 4.44/33 above.
5775 If there are any other similar loopholes, the new check in host_aton()
5776 itself should stop them being exploited. The report I received stated that
5777 data on the command line could provoke the exploit when Exim was running as
5778 exim, but did not say which command line option was involved. All I could
5779 find was the use of -be with a bad dnsdb PTR lookup, and in that case it is
5780 running as the user.
5783 35. There was a buffer overflow vulnerability in the SPA authentication code
5784 (which came originally from the Samba project). I have added a test to the
5785 spa_base64_to_bits() function which I hope fixes it.
5788 36. The daemon start-up calls getloadavg() while still root for those OS that
5789 need the first call to be done as root, but it missed one case: when
5790 deliver_queue_load_max is set with deliver_drop_privilege. This is
5791 necessary for the benefit of the queue runner, because there is no re-exec
5792 when deliver_drop_privilege is set.
5794 37. Caching of lookup data for "hosts =" ACL conditions, when a named host list
5795 was in use, was not putting the data itself into the right store pool;
5796 consequently, it could be overwritten for a subsequent message in the same
5797 SMTP connection. (Fix 4.40/11 dealt with the non-cache case, but overlooked
5800 38. Sometimes the final signoff response after QUIT could fail to get
5801 transmitted in the non-TLS case. Testing !tls_active instead of tls_active
5802 < 0 before doing a fflush(). This bug looks as though it goes back to the
5803 introduction of TLS in release 3.20, but "sometimes" must have been rare
5804 because the tests only now provoked it.
5810 1. Fixed a longstanding but relatively impotent bug: a long time ago, before
5811 PIPELINING, the function smtp_write_command() used to return TRUE or FALSE.
5812 Now it returns an integer. A number of calls were still expecting a T/F
5813 return. Fortuitously, in all cases, the tests worked in OK situations,
5814 which is the norm. However, things would have gone wrong on any write
5815 failures on the smtp file descriptor. This function is used when sending
5816 messages over SMTP and also when doing verify callouts.
5818 2. When Exim is called to do synchronous delivery of a locally submitted
5819 message (the -odf or -odi options), it no longer closes stderr before doing
5822 3. Implemented the mua_wrapper option.
5824 4. Implemented mx_fail_domains and srv_fail_domains for the dnslookup router.
5826 5. Implemented the functions header_remove(), header_testname(),
5827 header_add_at_position(), and receive_remove_recipient(), and exported them
5830 6. If an ACL "warn" statement specified the addition of headers, Exim already
5831 inserted X-ACL-Warn: at the start if there was no header name. However, it
5832 was not making this test for the second and subsequent header lines if
5833 there were newlines in the string. This meant that an invalid header could
5834 be inserted if Exim was badly configured.
5836 7. Allow an ACL "warn" statement to add header lines at the start or after all
5837 the Received: headers, as well as at the end.
5839 8. Added the rcpt_4xx retry error code.
5841 9. Added postmaster_mailfrom=xxx to callout verification option.
5843 10. Added mailfrom=xxxx to the callout verification option, for verify=
5846 11. ${substr_1_:xxxx} and ${substr__3:xxxx} are now diagnosed as syntax errors
5847 (they previously behaved as ${substr_1_0:xxxx} and ${substr:_0_3:xxxx}).
5849 12. Inserted some casts to stop certain compilers warning when using pointer
5850 differences as field lengths or precisions in printf-type calls (mostly
5851 affecting debugging statements).
5853 13. Added optional readline() support for -be (dynamically loaded).
5855 14. Obscure bug fix: if a message error (e.g. 4xx to MAIL) happened within the
5856 same clock tick as a message's arrival, so that its received time was the
5857 same as the "first fail" time on the retry record, and that message
5858 remained on the queue past the ultimate address timeout, every queue runner
5859 would try a delivery (because it was past the ultimate address timeout) but
5860 after another failure, the ultimate address timeout, which should have then
5861 bounced the address, did not kick in. This was a "< instead of <=" error;
5862 in most cases the first failure would have been in the next clock tick
5863 after the received time, and all would be well.
5865 15. The special items beginning with @ in domain lists (e.g. @mx_any) were not
5866 being recognized when the domain list was tested by the match_domain
5867 condition in an expansion string.
5869 16. Added the ${str2b64: operator.
5871 17. Exim was always calling setrlimit() to set a large limit for the number of
5872 processes, without checking whether the existing limit was already
5873 adequate. (It did check for the limit on file descriptors.) Furthermore,
5874 errors from getrlimit() and setrlimit() were being ignored. Now they are
5875 logged to the main and panic logs, but Exim does carry on, to try to do its
5876 job under whatever limits there are.
5878 18. Imported PCRE 5.0.
5880 19. Trivial typo in log message " temporarily refused connection" (the leading
5883 20. If the log selector return_path_on_delivery was set and an address was
5884 redirected to /dev/null, the delivery process crashed because it assumed
5885 that a return path would always be set for a "successful" delivery. In this
5886 case, the whole delivery is bypassed as an optimization, and therefore no
5889 21. Internal re-arrangement: the function for sending a challenge and reading
5890 a response while authentication was assuming a zero-terminated challenge
5891 string. It's now changed to take a pointer and a length, to allow for
5892 binary data in such strings.
5894 22. Added the cyrus_sasl authenticator (code supplied by MBM).
5896 23. Exim was not respecting finduser_retries when seeking the login of the
5897 uid under which it was called; it was always trying 10 times. (The default
5898 setting of finduser_retries is zero.) Also, it was sleeping after the final
5899 failure, which is pointless.
5901 24. Implemented tls_on_connect_ports.
5903 25. Implemented acl_smtp_predata.
5905 26. If the domain in control=submission is set empty, Exim assumes that the
5906 authenticated id is a complete email address when it generates From: or
5907 Sender: header lines.
5909 27. Added "#define SOCKLEN_T int" to OS/os.h-SCO and OS/os.h-SCO_SV. Also added
5910 definitions to OS/Makefile-SCO and OS/Makefile-SCO_SV that put basename,
5911 chown and chgrp in /bin and hostname in /usr/bin.
5913 28. Exim was keeping the "process log" file open after each use, just as it
5914 does for the main log. This opens the possibility of it remaining open for
5915 long periods when the USR1 signal hits a daemon. Occasional processlog
5916 errors were reported, that could have been caused by this. Anyway, it seems
5917 much more sensible not to leave this file open at all, so that is what now
5920 29. The long-running daemon process does not normally write to the log once it
5921 has entered its main loop, and it closes the log before doing so. This is
5922 so that log files can straightforwardly be renamed and moved. However,
5923 there are a couple of unusual error situations where the daemon does write
5924 log entries, and I had neglected to close the log afterwards.
5926 30. The text of an SMTP error response that was received during a remote
5927 delivery was being truncated at 512 bytes. This is too short for some of
5928 the long messages that one sometimes sees. I've increased the limit to
5931 31. It is now possible to make retry rules that apply only when a message has a
5932 specific sender, in particular, an empty sender.
5934 32. Added "control = enforce_sync" and "control = no_enforce_sync". This makes
5935 it possible to be selective about when SMTP synchronization is enforced.
5937 33. Added "control = caseful_local_part" and "control = "caselower_local_part".
5939 32. Implemented hosts_connection_nolog.
5941 33. Added an ACL for QUIT.
5943 34. Setting "delay_warning=" to disable warnings was not working; it gave a
5946 35. Added mailbox_size and mailbox_filecount to appendfile.
5948 36. Added control = no_multiline_responses to ACLs.
5950 37. There was a bug in the logic of the code that waits for the clock to tick
5951 in the case where the clock went backwards by a substantial amount such
5952 that the microsecond fraction of "now" was more than the microsecond
5953 fraction of "then" (but the whole seconds number was less).
5955 38. Added support for the libradius Radius client library this is found on
5956 FreeBSD (previously only the radiusclient library was supported).
5962 1. When certain lookups returned multiple values in the form name=value, the
5963 quoting of the values was not always being done properly. Specifically:
5964 (a) If the value started with a double quote, but contained no whitespace,
5966 (b) If the value contained whitespace other than a space character (i.e.
5967 tabs or newlines or carriage returns) it was not quoted.
5968 This fix has been applied to the mysql and pgsql lookups by writing a
5969 separate quoting function and calling it from the lookup code. The fix
5970 should probably also be applied to nisplus, ibase and oracle lookups, but
5971 since I cannot test any of those, I have not disturbed their existing code.
5973 2. A hit in the callout cache for a specific address caused a log line with no
5974 reason for rejecting RCPT. Now it says "Previous (cached) callout
5975 verification failure".
5977 3. There was an off-by-one bug in the queryprogram router. An over-long
5978 return line was truncated at 256 instead of 255 characters, thereby
5979 overflowing its buffer with the terminating zero. As well as fixing this, I
5980 have increased the buffer size to 1024 (and made a note to document this).
5982 4. If an interrupt, such as the USR1 signal that is send by exiwhat, arrives
5983 when Exim is waiting for an SMTP response from a remote server, Exim
5984 restarts its select() call on the socket, thereby resetting its timeout.
5985 This is not a problem when such interrupts are rare. Somebody set up a cron
5986 job to run exiwhat every 2 minutes, which is less than the normal select()
5987 timeout (5 or 10 minutes). This meant that the select() timeout never
5988 kicked in because it was always reset. I have fixed this by comparing the
5989 time when an interrupt arrives with the time at the start of the first call
5990 to select(). If more time than the timeout has elapsed, the interrupt is
5991 treated as a timeout.
5993 5. Some internal re-factoring in preparation for the addition of Sieve
5994 extensions (by MH). In particular, the "personal" test is moved to a
5995 separate function, and given an option for scanning Cc: and Bcc: (which is
5996 not set for Exim filters).
5998 6. When Exim created an email address using the login of the caller as the
5999 local part (e.g. when creating a From: or Sender: header line), it was not
6000 quoting the local part when it contained special characters such as @.
6002 7. Installed new OpenBSD configuration files.
6004 8. Reworded some messages for syntax errors in "and" and "or" conditions to
6005 try to make them clearer.
6007 9. Callout options, other than the timeout value, were being ignored when
6008 verifying sender addresses in header lines. For example, when using
6010 verify = header_sender/callout=no_cache
6012 the cache was (incorrectly) being used.
6014 10. Added a missing instance of ${EXE} to the exim_install script; this affects
6015 only the Cygwin environment.
6017 11. When return_path_on_delivery was set as a log selector, if different remote
6018 addresses in the same message used different return paths and parallel
6019 remote delivery occurred, the wrong values would sometimes be logged.
6020 (Whenever a remote delivery process finished, the return path value from
6021 the most recently started remote delivery process was logged.)
6023 12. RFC 3848 specifies standard names for the "with" phrase in Received: header
6024 lines when AUTH and/or TLS are in use. This is the "received protocol"
6025 field. Exim used to use "asmtp" for authenticated SMTP, without any
6026 indication (in the protocol name) for TLS use. Now it follows the RFC and
6027 uses "esmtpa" if the connection is authenticated, "esmtps" if it is
6028 encrypted, and "esmtpsa" if it is both encrypted and authenticated. These
6029 names appear in log lines as well as in Received: header lines.
6031 13. Installed MH's patches for Sieve to add the "copy" and "vacation"
6032 extensions, and comparison tests, and to fix some bugs.
6034 14. Changes to the "personal" filter test:
6036 (1) The test was buggy in that it was just doing the equivalent of
6037 "contains" tests on header lines. For example, if a user's address was
6038 anne@some.where, the "personal" test would incorrectly be true for
6040 To: susanne@some.where
6042 This test is now done by extracting each address from the header in turn,
6043 and checking the entire address. Other tests that are part of "personal"
6044 are now done using regular expressions (for example, to check local parts
6045 of addresses in From: header lines).
6047 (2) The list of non-personal local parts in From: addresses has been
6048 extended to include "listserv", "majordomo", "*-request", and "owner-*",
6049 taken from the Sieve specification recommendations.
6051 (3) If the message contains any header line starting with "List-" it is
6052 treated as non-personal.
6054 (4) The test for "circular" in the Subject: header line has been removed
6055 because it now seems ill-conceived.
6057 15. Minor typos in src/EDITME comments corrected.
6059 16. Installed latest exipick from John Jetmore.
6061 17. If headers_add on a router specified a text string that was too long for
6062 string_sprintf() - that is, longer than 8192 bytes - Exim panicked. The use
6063 of string_sprintf() is now avoided.
6065 18. $message_body_size was not set (it was always zero) when running the DATA
6066 ACL and the local_scan() function.
6068 19. For the "mail" command in an Exim filter, no default was being set for
6069 the once_repeat time, causing a random time value to be used if "once" was
6070 specified. (If the value happened to be <= 0, no repeat happened.) The
6071 default is now 0s, meaning "never repeat". The "vacation" command was OK
6072 (its default is 7d). It's somewhat surprising nobody ever noticed this bug
6073 (I found it when inspecting the code).
6075 20. There is now an overall timeout for performing a callout verification. It
6076 defaults to 4 times the callout timeout, which applies to individual SMTP
6077 commands during the callout. The overall timeout applies when there is more
6078 than one host that can be tried. The timeout is checked before trying the
6079 next host. This prevents very long delays if there are a large number of
6080 hosts and all are timing out (e.g. when the network connections are timing
6081 out). The value of the overall timeout can be changed by specifying an
6082 additional sub-option for "callout", called "maxwait". For example:
6084 verify = sender/callout=5s,maxwait=20s
6086 21. Add O_APPEND to the open() call for maildirsize files (Exim already seeks
6087 to the end before writing, but this should make it even safer).
6089 22. Exim was forgetting that it had advertised PIPELINING for the second and
6090 subsequent messages on an SMTP connection. It was also not resetting its
6091 memory on STARTTLS and an internal HELO.
6093 23. When Exim logs an SMTP synchronization error within a session, it now
6094 records whether PIPELINING has been advertised or not.
6096 24. Added 3 instances of "(long int)" casts to time_t variables that were being
6097 formatted using %ld, because on OpenBSD (and perhaps others), time_t is int
6098 rather than long int.
6100 25. Installed the latest Cygwin configuration files from the Cygwin maintainer.
6102 26. Added the never_mail option to autoreply.
6108 1. A reorganization of the code in order to implement 4.40/8 caused a daemon
6109 crash if the getsockname() call failed; this can happen if a connection is
6110 closed very soon after it is established. The problem was simply in the
6111 order in which certain operations were done, causing Exim to try to write
6112 to the SMTP stream before it had set up the file descriptor. The bug has
6113 been fixed by making things happen in the correct order.
6119 1. If "drop" was used in a DATA ACL, the SMTP output buffer was not flushed
6120 before the connection was closed, thus losing the rejection response.
6122 2. Commented out the definition of SOCKLEN_T in os.h-SunOS5. It is needed for
6123 some early Solaris releases, but causes trouble in current releases where
6124 socklen_t is defined.
6126 3. When std{in,out,err} are closed, re-open them to /dev/null so that they
6129 4. Minor refactoring of os.c-Linux to avoid compiler warning when IPv6 is not
6132 5. Refactoring in expand.c to improve memory usage. Pre-allocate a block so
6133 that releasing the top of it at the end releases what was used for sub-
6134 expansions (unless the block got too big). However, discard this block if
6135 the first thing is a variable or header, so that we can use its block when
6136 it is dynamic (useful for very large $message_headers, for example).
6138 6. Lookups now cache *every* query, not just the most recent. A new, separate
6139 store pool is used for this. It can be recovered when all lookup caches are
6140 flushed. Lookups now release memory at the end of their result strings.
6141 This has involved some general refactoring of the lookup sources.
6143 7. Some code has been added to the store_xxx() functions to reduce the amount
6144 of flapping under certain conditions.
6146 8. log_incoming_interface used to affect only the <= reception log lines. Now
6147 it causes the local interface and port to be added to several more SMTP log
6148 lines, for example "SMTP connection from", and rejection lines.
6150 9. The Sieve author supplied some patches for the doc/README.SIEVE file.
6152 10. Added a conditional definition of _BSD_SOCKLEN_T to os.h-Darwin.
6154 11. If $host_data was set by virtue of a hosts lookup in an ACL, its value
6155 could be overwritten at the end of the current message (or the start of a
6156 new message if it was set in a HELO ACL). The value is now preserved for
6157 the duration of the SMTP connection.
6159 12. If a transport had a headers_rewrite setting, and a matching header line
6160 contained an unqualified address, that address was qualified, even if it
6161 did not match any rewriting rules. The underlying bug was that the values
6162 of the flags that permit the existence of unqualified sender and recipient
6163 addresses in header lines (set by {sender,recipient}_unqualified_hosts for
6164 non-local messages, and by -bnq for local messages) were not being
6165 preserved with the message after it was received.
6167 13. When Exim was logging an SMTP synchronization error, it could sometimes log
6168 "next input=" as part of the text comprising the host identity instead of
6169 the correct text. The code was using the same buffer for two different
6170 strings. However, depending on which order the printing function evaluated
6171 its arguments, the bug did not always show up. Under Linux, for example, my
6172 test suite worked just fine.
6174 14. Exigrep contained a use of Perl's "our" scoping after change 4.31/70. This
6175 doesn't work with some older versions of Perl. It has been changed to "my",
6176 which in any case is probably the better facility to use.
6178 15. A really picky compiler found some instances of statements for creating
6179 error messages that either had too many or two few arguments for the format
6182 16. The size of the buffer for calls to the DNS resolver has been increased
6183 from 1024 to 2048. A larger buffer is needed when performing PTR lookups
6184 for addresses that have a lot of PTR records. This alleviates a problem; it
6185 does not fully solve it.
6187 17. A dnsdb lookup for PTR records that receives more data than will fit in the
6188 buffer now truncates the list and logs the incident, which is the same
6189 action as happens when Exim is looking up a host name and its aliases.
6190 Previously in this situation something unpredictable would happen;
6191 sometimes it was "internal error: store_reset failed".
6193 18. If a server dropped the connection unexpectedly when an Exim client was
6194 using GnuTLS and trying to read a response, the client delivery process
6195 crashed while trying to generate an error log message.
6197 19. If a "warn" verb in an ACL added multiple headers to a message in a single
6198 string, for example:
6200 warn message = H1: something\nH2: something
6202 the text was added as a single header line from Exim's point of view
6203 though it ended up OK in the delivered message. However, searching for the
6204 second and subsequent header lines using $h_h2: did not work. This has been
6205 fixed. Similarly, if a system filter added multiple headers in this way,
6206 the routers could not see them.
6208 20. Expanded the error message when iplsearch is called with an invalid key to
6209 suggest using net-iplsearch in a host list.
6211 21. When running tests using -bh, any delays imposed by "delay" modifiers in
6212 ACLs are no longer actually imposed (and a message to that effect is
6215 22. If a "gecos" field in a passwd entry contained escaped characters, in
6216 particular, if it contained a \" sequence, Exim got it wrong when building
6217 a From: or a Sender: header from that name. A second bug also caused
6218 incorrect handling when an unquoted " was present following a character
6219 that needed quoting.
6221 23. "{crypt}" as a password encryption mechanism for a "crypteq" expansion item
6222 was not being matched caselessly.
6224 24. Arranged for all hyphens in the exim.8 source to be escaped with
6227 25. Change 16 of 4.32, which reversed 71 or 4.31 didn't quite do the job
6228 properly. Recipient callout cache records were still being keyed to include
6229 the sender, even when use_sender was set false. This led to far more
6230 callouts that were necessary. The sender is no longer included in the key
6231 when use_sender is false.
6233 26. Added "control = submission" modifier to ACLs.
6235 27. Added the ${base62d: operator to decode base 62 numbers.
6237 28. dnsdb lookups can now access SRV records.
6239 29. CONFIGURE_OWNER can be set at build time to define an alternative owner for
6240 the configuration file.
6242 30. The debug message "delivering xxxxxx-xxxxxx-xx" is now output in verbose
6243 (-v) mode. This makes the output for a verbose queue run more intelligible.
6245 31. Added a use_postmaster feature to recipient callouts.
6247 32. Added the $body_zerocount variable, containing the number of binary zero
6248 bytes in the message body.
6250 33. The time of last modification of the "new" subdirectory is now used as the
6251 "mailbox time last read" when there is a quota error for a maildir
6254 34. Added string comparison operators lt, lti, le, lei, gt, gti, ge, gei.
6256 35. Added +ignore_unknown as a special item in host lists.
6258 36. Code for decoding IPv6 addresses in host lists is now included, even if
6259 IPv6 support is not being compiled. This fixes a bug in which an IPv6
6260 address was recognized as an IP address, but was then not correctly decoded
6261 into binary, causing unexpected and incorrect effects when compared with
6268 1. Very minor rewording of debugging text in manualroute to say "list of
6269 hosts" instead of "hostlist".
6271 2. If verify=header_syntax was set, and a header line with an unqualified
6272 address (no domain) and a large number of spaces between the end of the
6273 name and the colon was received, the reception process suffered a buffer
6274 overflow, and (when I tested it) crashed. This was caused by some obsolete
6275 code that should have been removed. The fix is to remove it!
6277 3. When running in the test harness, delay a bit after writing a bounce
6278 message to get a bit more predictability in the log output.
6280 4. Added a call to search_tidyup() just before forking a reception process. In
6281 theory, someone could use a lookup in the expansion of smtp_accept_max_
6282 per_host which, without the tidyup, could leave open a database connection.
6284 5. Added the variables $recipient_data and $sender_data which get set from a
6285 lookup success in an ACL "recipients" or "senders" condition, or a router
6286 "senders" option, similar to $domain_data and $local_part_data.
6288 6. Moved the writing of debug_print from before to after the "senders" test
6291 7. Change 4.31/66 (moving the time when the Received: is generated) caused
6292 problems for message scanning, either using a data ACL, or using
6293 local_scan() because the Received: header was not generated till after they
6294 were called (in order to set the time as the time of reception completion).
6295 I have revised the way this works. The header is now generated after the
6296 body is received, but before the ACL or local_scan() are called. After they
6297 are run, the timestamp in the header is updated.
6303 1. Change 4.24/6 introduced a bug because the SIGALRM handler was disabled
6304 before starting a queue runner without re-exec. This happened only when
6305 deliver_drop_privilege was set or when the Exim user was set to root. The
6306 effect of the bug was that timeouts during subsequent deliveries caused
6307 crashes instead of being properly handled. The handler is now left at its
6308 default (and expected) setting.
6310 2. The other case in which a daemon avoids a re-exec is to deliver an incoming
6311 message, again when deliver_drop_privilege is set or Exim is run as root.
6312 The bug described in (1) was not present in this case, but the tidying up
6313 of the other signals was missing. I have made the two cases consistent.
6315 3. The ignore_target_hosts setting on a manualroute router was being ignored
6316 for hosts that were looked up using the /MX notation.
6318 4. Added /ignore=<ip list> feature to @mx_any, @mx_primary, and @mx_secondary
6321 5. Change 4.31/55 was buggy, and broke when there was a rewriting rule that
6322 operated on the sender address. After changing the $sender_address to <>
6323 for the sender address verify, Exim was re-instated it as the original
6324 (before rewriting) address, but remembering that it had rewritten it, so it
6325 wasn't rewriting it again. This bug also had the effect of breaking the
6326 sender address verification caching when the sender address was rewritten.
6328 6. The ignore_target_hosts option was being ignored by the ipliteral router.
6329 This has been changed so that if the ip literal address matches
6330 ignore_target_hosts, the router declines.
6332 7. Added expansion conditions match_domain, match_address, and match_local_
6333 part (NOT match_host).
6335 8. The placeholder for the Received: header didn't have a length field set.
6337 9. Added code to Exim itself and to exim_lock to test for a specific race
6338 condition that could lead to file corruption when using MBX delivery. The
6339 issue is with the lockfile that is created in /tmp. If this file is removed
6340 after a process has opened it but before that process has acquired a lock,
6341 there is the potential for a second process to recreate the file and also
6342 acquire a lock. This could lead to two Exim processes writing to the file
6343 at the same time. The added code performs the same test as UW imapd; it
6344 checks after acquiring the lock that its file descriptor still refers to
6345 the same named file.
6347 10. The buffer for building added header lines was of fixed size, 8192 bytes.
6348 It is now parameterized by HEADER_ADD_BUFFER_SIZE and this can be adjusted
6351 11. Added the smtp_active_hostname option. If used, this will typically be made
6352 to depend on the incoming interface address. Because $interface_address is
6353 not set up until the daemon has forked a reception process, error responses
6354 that can happen earlier (such as "too many connections") no longer contain
6357 12. If an expansion in a condition on a "warn" statement fails because a lookup
6358 defers, the "warn" statement is abandoned, and the next ACL statement is
6359 processed. Previously this caused the whole ACL to be aborted.
6361 13. Added the iplsearch lookup type.
6363 14. Added ident_timeout as a log selector.
6365 15. Added tls_certificate_verified as a log selector.
6367 16. Added a global option tls_require_ciphers (compare the smtp transport
6368 option of the same name). This controls incoming TLS connections.
6370 17. I finally figured out how to make tls_require_ciphers do a similar thing
6371 in GNUtls to what it does in OpenSSL, that is, set up an appropriate list
6372 before starting the TLS session.
6374 18. Tabs are now shown as \t in -bP output.
6376 19. If the log selector return_path_on_delivery was set, Exim crashed when
6377 bouncing a message because it had too many Received: header lines.
6379 20. If two routers both had headers_remove settings, and the first one included
6380 a superfluous trailing colon, the final name in the first list and the
6381 first name in the second list were incorrectly joined into one item (with a
6382 colon in the middle).
6388 1. Added -C and -D options to the exinext utility, mainly to make it easier
6389 to include in the automated testing, but these could be helpful when
6390 multiple configurations are in use.
6392 2. The exinext utility was not formatting the output nicely when there was
6393 an alternate port involved in the retry record key, nor when there was a
6394 message id as well (for retries that were specific to a specific message
6395 and a specific host). It was also confused by IPv6 addresses, because of
6396 the additional colons they contain. I have fixed the IPv4 problem, and
6397 patched it up to do a reasonable job for IPv6.
6399 3. When there is an error after a MAIL, RCPT, or DATA SMTP command during
6400 delivery, the log line now contains "pipelined" if PIPELINING was used.
6402 4. An SMTP transport process used to panic and die if the bind() call to set
6403 an explicit outgoing interface failed. This has been changed; it is now
6404 treated in the same way as a connect() failure.
6406 5. A reference to $sender_host_name in the part of a conditional expansion
6407 that was being skipped was still causing a DNS lookup. This no longer
6410 6. The def: expansion condition was not recognizing references to header lines
6411 that used bh_ and bheader_.
6413 7. Added the _cache feature to named lists.
6415 8. The code for checking quota_filecount in the appendfile transport was
6416 allowing one more file than it should have been.
6418 9. For compatibility with Sendmail, the command line option
6426 and sets the incoming protocol and host name (for trusted callers). The
6427 host name and its colon can be omitted when only the protocol is to be set.
6428 Note the Exim already has two private options, -pd and -ps, that refer to
6429 embedded Perl. It is therefore impossible to set a protocol value of "d" or
6430 "s", but I don't think that's a major issue.
6432 10. A number of refactoring changes to the code, none of which should affect
6435 (a) The number of logging options was getting close to filling up the
6436 32-bit word that was used as a bit map. I have split them into two classes:
6437 those that are passed in the argument to log_write(), and those that are
6438 only ever tested independently outside of that function. These are now in
6439 separate 32-bit words, so there is plenty of room for expansion again.
6440 There is no change in the user interface or the logging behaviour.
6442 (b) When building, for example, log lines, the code previously used a
6443 macro that called string_cat() twice, in order to add two strings. This is
6444 not really sufficiently general. Furthermore, there was one instance where
6445 it was actually wrong because one of the argument was used twice, and in
6446 one call a function was used. (As it happened, calling the function twice
6447 did not affect the overall behaviour.) The macro has been replaced by a
6448 function that can join an arbitrary number of extra strings onto a growing
6451 (c) The code for expansion conditions now uses a table and a binary chop
6452 instead of a serial search (which was left over from when there were very
6453 few conditions). Also, it now recognizes conditions like "pam" even when
6454 the relevant support is not compiled in: a suitably worded error message is
6455 given if an attempt is made to use such a condition.
6457 11. Added ${time_interval:xxxxx}.
6459 12. A bug was causing one of the ddress fields not to be passed back correctly
6460 from remote delivery subprocesses. The field in question was not being
6461 subsequently used, so this caused to problems in practice.
6463 13. Added new log selectors queue_time and deliver_time.
6465 14. Might have fixed a bug in maildirsizefile handling that threw up
6466 "unexpected character" debug warnings, and recalculated the data
6467 unnecessarily. In any case, I expanded the warning message to give more
6470 15. Added the message "Restricted characters in address" to the statements in
6471 the default ACL that block characters like @ and % in local parts.
6473 16. Change 71 for release 4.31 proved to be much less benign that I imagined.
6474 Three changes have been made:
6476 (a) There was a serious bug; a negative response to MAIL caused the whole
6477 recipient domain to be cached as invalid, thereby blocking all messages
6478 to all local parts at the same domain, from all senders. This bug has
6479 been fixed. The domain is no longer cached after a negative response to
6480 MAIL if the sender used is not empty.
6482 (b) The default behaviour of using MAIL FROM:<> for recipient callouts has
6485 (c) A new callout option, "use_sender" has been added for people who want
6486 the modified behaviour.
6492 1. Removed "EXTRALIBS=-lwrap" from OS/Makefile-Unixware7 on the advice of
6495 2. Removed "LIBS = -lresolv" from OS/Makefile-Darwin as it is not needed, and
6496 indeed breaks things for older releases.
6498 3. Added additional logging to the case where there is a problem reading data
6499 from a filter that is running in a subprocess using a pipe, in order to
6500 try to track down a specific problem.
6502 4. Testing facility fudge: when running in the test harness and attempting
6503 to connect to 10.x.x.x (expecting a connection timeout) I'm now sometimes
6504 getting "No route to host". Convert this to a timeout.
6506 5. Define ICONV_ARG2_TYPE as "char **" for Unixware7 to avoid compiler
6509 6. Some OS don't have socklen_t but use size_t instead. This affects the
6510 fifth argument of getsockopt() amongst other things. This is now
6511 configurable by a macro called SOCKLEN_T which defaults to socklen_t, but
6512 can be set for individual OS. I have set it for SunOS5, OSF1, and
6513 Unixware7. Current versions of SunOS5 (aka Solaris) do have socklen_t, but
6514 some earlier ones do not.
6516 7. Change 4.30/15 was not doing the test caselessly.
6518 8. The standard form for an IPv6 address literal was being rejected by address
6519 parsing in, for example, MAIL and RCPT commands. An example of this kind of
6520 address is [IPv6:2002:c1ed:8229:10:202:2dff:fe07:a42a]. Exim now accepts
6521 this, as well as the form without the "IPv6" on the front (but only when
6522 address literals are enabled, of course).
6524 9. Added some casts to avoid compiler warnings in OS/os.c-Linux.
6526 10. Exim crashed if a message with an empty sender address specified by -f
6527 encountered a router with an errors_to setting. This could be provoked only
6528 by a command such as
6532 where an empty string was supplied; "<>" did not hit this bug.
6534 11. Installed PCRE release 4.5.
6536 12. If EHLO/HELO was rejected by an ACL, the value of $sender_helo_name
6537 remained set. It is now erased.
6539 13. exiqgrep wasn't working on MacOS X because it didn't correctly compute
6540 times from message ids (which are base 36 rather than the normal 62).
6542 14. "Expected" SMTP protocol errors that can arise when PIPELINING is in use
6543 were being counted as actual protocol errors, and logged if the log
6544 selector +smtp_protocol_error was set. One cannot be perfect in this test,
6545 but now, if PIPELINING has been advertised, RCPT following a rejected MAIL,
6546 and DATA following a set of rejected RCPTs do not count as protocol errors.
6547 In other words, Exim assumes they were pipelined, though this may not
6548 actually be the case. Of course, in all cases the client gets an
6549 appropriate error code.
6551 15. If a lookup fails in an ACL condition, a message about the failure may
6552 be available; it is used if testing the ACL cannot continue, because most
6553 such messages specify what the cause of the deferral is. However, some
6554 messages (e.g. "MYSQL: no data found") do not cause a defer. There was bug
6555 that caused an old message to be retained and used if a later statement
6556 caused a defer, replacing the real cause of the deferral.
6558 16. If an IP address had so many PTR records that the DNS lookup buffer
6559 was not large enough to hold them, Exim could crash while trying to process
6560 the truncated data. It now detects and logs this case.
6562 17. Further to 4.21/58, another change has been made: if (and only if) the
6563 first line of a message (the first header line) ends with CRLF, a bare LF
6564 in a subsequent header line has a space inserted after it, so as not to
6565 terminate the header.
6567 18. Refactoring: tidied an ugly bit of code in appendfile that copied data
6568 unnecessarily, used atoi() instead of strtol(), and didn't check the
6569 termination when getting file sizes from file names by regex.
6571 19. Completely re-implemented the support for maildirsize files, in the light
6572 of a number of problems with the previous contributed implementation
6573 (4.30/29). In particular:
6575 . If the quota is zero, the maildirsize file is maintained, but no quota is
6578 . If the maildir directory does not exist, it is created before any attempt
6579 to write a maildirsize file.
6581 . The quota value in the file is just a cache; if the quota is changed in
6582 the transport, the new value overrides.
6584 . A regular expression is available for excluding directories from the
6587 20. The autoreply transport checks the characters in options that define the
6588 message's headers; it allows continued headers, but it was checking with
6589 isspace() after an embedded newline instead of explicitly looking for a
6592 21. If all the "regular" hosts to which an address was routed had passed their
6593 expiry times, and had not reached their retry times, the address was
6594 bounced, even if fallback hosts were defined. Now Exim should go on to try
6597 22. Increased buffer sizes in the callout code from 1024 to 4096 to match the
6598 equivalent code in the SMTP transport. Some hosts send humungous responses
6599 to HELO/EHLO, more than 1024 it seems.
6601 23. Refactoring: code in filter.c used (void *) for "any old type" but this
6602 gives compiler warnings in some environments. I've now done it "properly",
6605 24. The replacement for inet_ntoa() that is used with gcc on IRIX systems
6606 (because of problems with the built-in one) was declared to return uschar *
6607 instead of char *, causing compiler failure.
6609 25. Fixed a file descriptor leak when processing alias/forward files.
6611 26. Fixed a minor format string issue in dbfn.c.
6613 27. Typo in exim.c: ("dmbnz" for "dbmnz").
6615 28. If a filter file refered to $h_xxx or $message_headers, and the headers
6616 contained RFC 2047 "words", Exim's memory could, under certain conditions,
6619 29. When a sender address is verified, it is cached, to save repeating the test
6620 when there is more than one recipient in a message. However, when the
6621 verification involves a callout, it is possible for different callout
6622 options to be set for different recipients. It is too complicated to keep
6623 track of this in the cache, so now Exim always runs a verification when a
6624 callout is required, relying on the callout cache for the optimization.
6625 The overhead is duplication of the address routing, but this should not be
6628 30. Fixed a bug in callout caching. If a RCPT command caused the sender address
6629 to be verified with callout=postmaster, and the main callout worked but the
6630 postmaster check failed, the verification correctly failed. However, if a
6631 subsequent RCPT command asked for sender verification *without* the
6632 postmaster check, incorrect caching caused this verification also to fail,
6635 31. Exim caches DNS lookup failures so as to avoid multiple timeouts; however,
6636 it was not caching the DNS options (qualify_single, search_parents) that
6637 were used when the lookup failed. A subsequent lookup with different
6638 options therefore always gave the same answer, though there were cases
6639 where it should not have. (Example: a "domains = !$mx_any" option on a
6640 dnslookup router: the "domains" option is always processed without any
6641 widening, but the router might have qualify_single set.) Now Exim uses the
6642 cached value only when the same options are set.
6644 32. Added John Jetmore's "exipick" utility to the distribution.
6646 33. GnuTLS: When an attempt to start a TLS session fails for any reason other
6647 than a timeout (e.g. a certificate is required, and is not provided), an
6648 Exim server now closes the connection immediately. Previously it waited for
6649 the client to close - but if the client is SSL, it seems that they each
6650 wait for each other, leading to a delay before one of them times out.
6652 34: GnuTLS: Updated the code to use the new GnuTLS 1.0.0 API. I have not
6653 maintained 0.8.x compatibility because I don't think many are using it, and
6654 it is clearly obsolete.
6656 35. Added TLS support for CRLs: a tls_crl global option and one for the smtp
6659 36. OpenSSL: $tls_certificate_verified was being set to 1 even if the
6660 client certificate was expired. A simple patch fixes this, though I don't
6661 understand the full logic of why the verify callback is called multiple
6664 37. OpenSSL: a patch from Robert Roselius: "Enable client-bug workaround.
6665 Versions of OpenSSL as of 0.9.6d include a 'CBC countermeasure' feature,
6666 which causes problems with some clients (such as the Certicom SSL Plus
6667 library used by Eudora). This option, SSL_OP_DONT_INSERT_EMPTY_FRAGMENTS,
6668 disables the coutermeasure allowing Eudora to connect."
6670 38. Exim was not checking that a write() to a log file succeeded. This could
6671 lead to Bad Things if a log got too big, in particular if it hit a file
6672 size limit. Exim now panics and dies if it cannot write to a log file, just
6673 as it does if it cannot open a log file.
6675 39. Modified OS/Makefile-Linux so that it now contains
6677 CFLAGS=-O -D_FILE_OFFSET_BITS=64 -D_LARGEFILE_SOURCE
6679 The two -D definitions ensure that Exim is compiled with large file
6680 support, which makes it possible to handle log files that are bigger than
6683 40. Fixed a subtle caching bug: if (in an ACL or a set of routers, for
6684 instance) a domain was checked against a named list that involved a lookup,
6685 causing $domain_data to be set, then another domain was checked against the
6686 same list, then the first domain was re-checked, the value of $domain_data
6687 after the final check could be wrong. In particular, if the second check
6688 failed, it could be set empty. This bug probably also applied to
6691 41. The strip_trailing_dot option was not being applied to the address given
6692 with the -f command-line option.
6694 42. The code for reading a message's header from the spool was incrementing
6695 $received_count, but never initializing it. This meant that the value was
6696 incorrect (doubled) while delivering a message in the same process in which
6697 it was received. In the most common configuration of Exim, this never
6698 happens - a fresh exec is done - but it can happen when
6699 deliver_drop_privilege is set.
6701 43. When Exim logs an SMTP synchronization error - client data sent too soon -
6702 it now includes up to 150 characters of the unexpected data in the log
6705 44. The exim_dbmbuild utility uses fixed size buffers for reading input lines
6706 and building data strings. The size of both of these buffers was 10 000
6707 bytes - far larger than anybody would *ever* want, thought I. Needless to
6708 say, somebody hit the limit. I have increased the maximum line length to
6709 20 000 and the maximum data length of concatenated lines to 100 000. I have
6710 also fixed two bugs, because there was no checking on these buffers. Tsk,
6711 tsk. Now exim_dbmbuild gives a message and exits with an error code if a
6712 buffer is too small.
6714 45. The exim_dbmbuild utility did not support quoted keys, as Exim does in
6715 lsearch lookups. Now it does.
6717 46. When parsing a route_list item in a manualroute router, a fixed-length
6718 buffer was used for the list of hosts. I made this 1024 bytes long,
6719 thinking that nobody would ever have a list of hosts that long. Wrong.
6720 Somebody had a whole pile of complicated expansion conditions, and the
6721 string was silently truncated, leading to an expansion error. It turns out
6722 that it is easier to change to an unlimited length (owing to other changes
6723 that have happened since this code was originally written) than to build
6724 structure for giving a limitation error. The length of the item that
6725 expands into the list of hosts is now unlimited.
6727 47. The lsearch lookup could not handle data where the length of text line was
6728 more than 4095 characters. Such lines were truncated, leading to shortened
6729 data being returned. It should now handle lines of any length.
6731 48. Minor wording revision: "cannot test xxx in yyy ACL" becomes "cannot test
6732 xxx condition in yyy ACL" (e.g. "cannot test domains condition in DATA
6735 49. Cosmetic tidy to scripts like exicyclog that are generated by globally
6736 replacing strings such as BIN_DIRECTORY in a source file: the replacement
6737 no longer happens in comment lines. A list of replacements is now placed
6738 at the head of all of the source files, except those whose only change is
6739 to replace PERL_COMMAND in the very first #! line.
6741 50. Replaced the slow insertion sort in queue.c, for sorting the list of
6742 messages on the queue, with a bottom-up merge sort, using code contributed
6743 by Michael Haardt. This should make operations like -bp somewhat faster on
6744 large queues. It won't affect queue runners, except when queue_run_in_order
6747 51. Installed eximstats 1.31 in the distribution.
6749 52. Added support for SRV lookups to the dnslookup router.
6751 53. If an ACL referred to $message_body or $message_body_end, the value was not
6752 reset for any messages that followed in the same SMTP session.
6754 54. The store-handling optimization for building very long strings was not
6755 differentiating between the different store pools. I don't think this
6756 actually made any difference in practice, but I've tidied it.
6758 55. While running the routers to verify a sender address, $sender_address
6759 was still set to the sender address. This is wrong, because when routing to
6760 send a bounce to the sender, it would be empty. Therefore, I have changed
6761 it so that, while verifying a sender address, $sender_address is set to <>.
6762 (There is no change to what happens when verifying a recipient address.)
6764 56. After finding MX (or SRV) records, Exim was doing a DNS lookup for the
6765 target A or AAAA records (if not already returned) without resetting the
6766 qualify_single or search_parents options of the DNS resolver. These are
6767 inappropriate in this case because the targets of MX and SRV records must
6768 be FQDNs. A broken DNS record could cause trouble if it happened to have a
6769 target that, when qualified, matched something in the local domain. These
6770 two options are now turned off when doing these lookups.
6772 57. It seems that at least some releases of Reiserfs (which does not have the
6773 concept of a fixed number of inodes) returns zero and not -1 for the
6774 number of available inodes. This interacted badly with check_spool_inodes,
6775 which assumed that -1 was the "no such thing" setting. What I have done is
6776 to check that the total number of inodes is greater than zero before doing
6777 the test of how many are available.
6779 58. When a "warn" ACL statement has a log_message modifier, the message is
6780 remembered, and not repeated. This is to avoid a lot of repetition when a
6781 message has many recipients that cause the same warning to be written.
6782 However, Exim was preserving the list of already written lines for an
6783 entire SMTP session, which doesn't seem right. The memory is now reset if a
6784 new message is started.
6786 59. The "rewrite" debugging flag was not showing the result of rewriting in the
6787 debugging output unless log_rewrite was also set.
6789 60. Avoid a compiler warning on 64-bit systems in dsearch.c by avoiding the use
6790 of (int)(handle) when we know that handle contains (void *)(-1).
6792 61. The Exim daemon panic-logs an error return when it closes the incoming
6793 connection. However "connection reset by peer" seems to be common, and
6794 isn't really an error worthy of noting specially, so that particular error
6797 62. When Exim is trying to find all the local interfaces, it used to panic and
6798 die if the ioctl to get the interface flags failed. However, it seems that
6799 on at least one OS (Solaris 9) it is possible to have an interface that is
6800 included in the list of interfaces, but for which you get a failure error
6801 for this call. This happens when the interface is not "plumbed" into a
6802 protocol (i.e. neither IPv4 nor IPv6). I've changed the code so that a
6803 failure of the "get flags" call assumes that the interface is down.
6805 63. Added a ${eval10: operator, which assumes all numbers are decimal. This
6806 makes life easier for people who are doing arithmetic on fields extracted
6807 from dates, where you often get leading zeros that should not be
6808 interpreted as octal.
6810 64. Added qualify_domain to the redirect router, to override the global
6813 65. If a pathologically long header line contained very many addresses (the
6814 report of this problem mentioned 10 000) and each of them was rewritten,
6815 Exim could use up a very large amount of memory. (It kept on making new
6816 copies of the header line as it rewrote, and never released the old ones.)
6817 At the expense of a bit more processing, the header rewriting function has
6818 been changed so that it no longer eats memory in this way.
6820 66. The generation of the Received: header has been moved from the time that a
6821 message starts to be received, to the time that it finishes. The timestamp
6822 in the Received: header should now be very close to that of the <= log
6823 line. There are two side-effects of this change:
6825 (a) If a message is rejected by a DATA or non-SMTP ACL or local_scan(), the
6826 logged header lines no longer include the local Received: line, because
6827 it has not yet been created. The same applies to a copy of the message
6828 that is returned to a non-SMTP sender when a message is rejected.
6830 (b) When a filter file is tested using -bf, no additional Received: header
6831 is added to the test message. After some thought, I decided that this
6834 This change does not affect the value of $received_for. It is still set
6835 after address rewriting, but before local_scan() is called.
6837 67. Installed the latest Cygwin-specific files from the Cygwin maintainer.
6839 68. GnuTLS: If an empty file is specified for tls_verify_certificates, GnuTLS
6840 gave an unhelpful panic error message, and a defer error. I have managed to
6841 change this behaviour so that it now rejects any supplied certificate,
6842 which seems right, as the list of acceptable certificates is empty.
6844 69. OpenSSL: If an empty file is specified for tls_verify_certificates, OpenSSL
6845 gave an unhelpful defer error. I have not managed to make this reject any
6846 supplied certificates, but the error message it gives is "no certificate
6847 supplied", which is not helpful.
6849 70. exigrep's output now also includes lines that are not associated with any
6850 message, but which match the given pattern. Implemented by a patch from
6851 Martin Sluka, which also tidied up the Perl a bit.
6853 71. Recipient callout verification, like sender verification, was using <> in
6854 the MAIL FROM command. This isn't really the right thing, since the actual
6855 sender may affect whether the remote host accepts the recipient or not. I
6856 have changed it to use the actual sender in the callout; this means that
6857 the cache record is now keyed on a recipient/sender pair, not just the
6858 recipient address. There doesn't seem to be a real danger of callout loops,
6859 since a callout by the remote host to check the sender would use <>.
6860 [SEE ABOVE: changed after hitting problems.]
6862 72. Exim treats illegal SMTP error codes that do not begin with 4 or 5 as
6863 temporary errors. However, in the case of such a code being given after
6864 the end of a data transmission (i.e. after ".") Exim was failing to write
6865 a retry record for the message. (Yes, there was some broken host that was
6866 actually sending 8xx at this point.)
6868 73. An unknown lookup type in a host list could cause Exim to panic-die when
6869 the list was checked. (An example that provoked this was putting <; in the
6870 middle of a list instead of at the start.) If this happened during a DATA
6871 ACL check, a -D file could be left lying around. This kind of configuration
6872 error no longer causes Exim to die; instead it causes a defer error. The
6873 incident is still logged to the main and panic logs.
6875 74. Buglet left over from Exim 3 conversion. The message "too many messages
6876 in one connection" was written to the rejectlog but not the mainlog, except
6877 when address rewriting (yes!) was being logged.
6879 75. Added write_rejectlog option.
6881 76. When a system filter was run not as root (that is, when system_filter_user
6882 was set), the values of the $n variables were not being returned to the
6883 main process; thus, they were not subsequently available in the $sn
6886 77. Added +return_path_on_delivery log selector.
6888 78. A connection timeout was being treated differently from recipients deferred
6889 when testing hosts_max_try with a message that was older than the host's
6890 retry timeout. (The host should not be counted, thus allowing all hosts to
6891 be tried at least once before bouncing.) This may have been the cause of an
6892 occasionally reported bug whereby a message would remain on the queue
6893 longer than the retry timeout, but would be bounced if a delivery was
6894 forced. I say "may" because I never totally pinned down the problem;
6895 setting up timeout/retry tests is difficult. See also the next item.
6897 79. The ultimate address timeout was not being applied to errors that involved
6898 a combination of host plus message (for example, a timeout on a MAIL
6899 command). When an address resolved to a number of possible hosts, and they
6900 were not all tried for each delivery (e.g. because of hosts_max_try), a
6901 message could remain on the queue longer than the retry timeout.
6903 80. Sieve bug: "stop" inside "elsif" was broken. Applied a patch from Michael
6906 81. Fixed an obscure SMTP outgoing bug which required at least the following
6907 conditions: (a) there was another message waiting for the same server;
6908 (b) the server returned 5xx to all RCPT commands in the first message so
6909 that the message was not completed; (c) the server dropped the connection
6910 or gave a negative response to the RSET that Exim sends to abort the
6911 transaction. The observed case was a dropped connection after DATA that had
6912 been sent in pipelining mode. That is, the server had advertised PIPELINING
6913 but was not implementing it correctly. The effect of the bug was incorrect
6914 behaviour, such as trying another host, and this could lead to a crash.
6920 1. The 3rd arguments to getsockname(), getpeername(), and accept() in exim.c
6921 and daemon.c were passed as pointers to ints; they should have been
6922 pointers to socklen_t variables (which are typically unsigned ints).
6924 2. Some signed/unsigned type warnings in the os.c file for Linux have been
6927 3. Fixed a really odd bug that affected only the testing scheme; patching a
6928 certain fixed string in the binary changed the value of another string that
6929 happened to be identical to the end of the original first string.
6931 4. When gethostbyname() (or equivalent) is passed an IP address as a "host
6932 name", it returns that address as the IP address. On some operating
6933 systems (e.g. Solaris), it also passes back the IP address string as the
6934 "host name". However, on others (e.g. Linux), it passes back an empty
6935 string. Exim wasn't checking for this, and was changing the host name to an
6936 empty string, assuming it had been canonicalized.
6938 5. Although rare, it is permitted to have more than one PTR record for a given
6939 IP address. I thought that gethostbyaddr() or getipnodebyaddr() always gave
6940 all the names associated with an address, because they do in Solaris.
6941 However, it seems that they do not in Linux for data that comes from the
6942 DNS. If an address in /etc/hosts has multiple names, they _are_ all given.
6943 I found this out when I moved to a new Linux workstation and tried to run
6944 the Exim test suite.
6946 To get round this problem I have changed the code so that it now does its
6947 own call to the DNS to look up PTR records when searching for a host name.
6948 If nothing can be found in the DNS, it tries gethostbyaddr(), so that
6949 addresses that are only in /etc/hosts are still found.
6951 This behaviour is, however, controlled by an option called host_lookup_
6952 order, which defaults to "bydns:byaddr". If people want to use the other
6953 order, or indeed, just use one or the other means of lookup, they can
6954 specify it in this variable.
6956 6. If a PTR record yields an empty name, Exim treats it as non-existent. In
6957 some operating systems, this comes back from gethostbyaddr() as an empty
6958 string, and this is what Exim used to test for. However, it seems that in
6959 other systems, "." is yielded. Exim now tests for this case too.
6961 7. The values of check_spool_space and check_log_space are now held internally
6962 as a number of kilobytes instead of an absolute number of bytes. If a
6963 numbers is specified without 'K' or 'M', it is rounded up to the nearest
6964 kilobyte. This means that much larger values can be stored.
6966 8. Exim monitor: an attempt to get the action menu when not actually pointing
6967 at a message produces an empty menu entitled "No message selected". This
6968 works on Solaris (OpenWindows). However, XFree86 does not like a menu with
6969 no entries in it ("Shell widget menu has zero width and/or height"). So I
6970 have added a single, blank menu entry in this case.
6972 9. Added ${quote_local_part.
6974 10. MIME decoding is now applied to the contents of Subject: header lines when
6977 11. Now that a reference to $sender_host_address automatically causes a reverse
6978 lookup to occur if necessary (4.13/18), there is no need to arrange for a
6979 host lookup before query-style lookups in lists that might use this
6980 variable. This has therefore been abolished, and the "net-" prefix is no
6981 longer necessary for query-style lookups.
6983 12. The Makefile for SCO_SV contained a setting of LDFLAGS. This appears to
6984 have been a typo for LFLAGS, so it has been changed.
6986 13. The install script calls Exim with "-C /dev/null" in order to find the
6987 version number. If ALT_CONFIG_PREFIX was set, this caused an error message
6988 to be output. However, since Exim outputs its version number before the
6989 error, it didn't break the script. It just looked ugly. I fixed this by
6990 always allowing "-C /dev/null" if the caller is root.
6992 14. Ignore overlarge ACL variable number when reading spool file - insurance
6993 against a later release with more variables having written the file.
6995 15. The standard form for an IPv6 address literal was being rejected by EHLO.
6996 Example: [IPv6:2002:c1ed:8229:10:202:2dff:fe07:a42a]. Exim now accepts
6997 this, as well as the form without the "IPv6" on the front.
6999 16. Added CHOWN_COMMAND=/usr/sbin/chown and LIBS=-lresolv to the
7000 OS/Makefile-Darwin file.
7002 17. Fixed typo in lookups/ldap.c: D_LOOKUP should be D_lookup. This applied
7003 only to LDAP libraries that do not have LDAP_OPT_DEREF.
7005 18. After change 4.21/52, "%ld" was used to format the contents of the $inode
7006 variable. However, some OS use ints for inodes. I've added cast to long int
7007 to get rid of the compiler warning.
7009 19. I had forgotten to lock out "/../" in configuration file names when
7010 ALT_CONFIG_PREFIX was set.
7012 20. Routers used for verification do not need to specify transports. However,
7013 if such a router generated a host list, and callout was configured, Exim
7014 crashed, because it could not find a port number from the (non-existent)
7015 transport. It now assumes port 25 in this circumstance.
7017 21. Added the -t option to exigrep.
7019 22. If LOOKUP_LSEARCH is defined, all three linear search methods (lsearch,
7020 wildlsearch, nwildlsearch) are compiled. LOOKUP_WILDLSEARCH and LOOKUP_
7021 NWILDLSEARCH are now obsolete, but retained for compatibility. If either of
7022 them is set, LOOKUP_LSEARCH is forced.
7024 23. "exim -bV" now outputs a list of lookups that are included in the binary.
7026 24. Added sender and host information to the "rejected by local_scan()" log
7027 line; previously there was no indication of these.
7029 25. Added .include_if_exists.
7031 26. Change 3.952/11 added an explicit directory sync on top of a file sync for
7032 Linux. It turns out that not all file systems support this. Apparently some
7033 versions of NFS do not. (It's rare to put Exim's spool on NFS, but people
7034 do it.) To cope with this, the error EINVAL, which means that sync-ing is
7035 not supported on the file descriptor, is now ignored when Exim is trying to
7036 sync a directory. This applies only to Linux.
7038 27. Added -DBIND_8_COMPAT to the CLFAGS setting for Darwin.
7040 28. In Darwin (MacOS X), the PAM headers are in /usr/include/pam and not in
7041 /usr/include/security. There's now a flag in OS/os.h-Darwin to cope with
7044 29. Added support for maildirsize files from supplied patch (modified a bit).
7046 30. The use of :fail: followed by an empty string could lead Exim to respond to
7047 sender verification failures with (e.g.):
7049 550 Verification failed for <xxx>
7050 550 Sender verify failed
7052 where the first response line was missing the '-' that indicates it is not
7053 the final line of the response.
7055 31. The loop for finding the name of the user that called Exim had a hardwired
7056 limit of 10; it now uses the value of finduser_retries, which is used for
7057 all other user lookups.
7059 32. Added $received_count variable, available in data and not_smtp ACLs, and at
7062 33. Exim was neglecting to zero errno before one call of strtol() when
7063 expanding a string and expecting an integer value. On some systems this
7064 resulted in spurious "integer overflow" errors. Also, it was casting the
7065 result into an int without checking.
7067 34. Testing for a connection timeout using "timeout_connect" in the retry rules
7068 did not work. The code looks as if it has *never* worked, though it appears
7069 to have been documented since at least release 1.62. I have made it work.
7071 35. The "timeout_DNS" error in retry rules, also documented since at least
7072 1.62, also never worked. As it isn't clear exactly what this means, and
7073 clearly it isn't a major issue, I have abolished the feature by treating it
7074 as "timeout", and writing a warning to the main and panic logs.
7076 36. The display of retry rules for -brt wasn't always showing the error code
7079 37. Added new error conditions to retry rules: timeout_A, timeout_MX,
7080 timeout_connect_A, timeout_connect_MX.
7082 38. Rewriting the envelope sender at SMTP time did not allow it to be rewritten
7083 to the empty sender.
7085 39. The daemon was not analysing the content of -oX till after it had closed
7086 stderr and disconnected from the controlling terminal. This meant that any
7087 syntax errors were only noted on the panic log, and the return code from
7088 the command was 0. By re-arranging the code a little, I've made the
7089 decoding happen first, so such errors now appear on stderr, and the return
7090 code is 1. However, the actual setting up of the sockets still happens in
7091 the disconnected process, so errors there are still only recorded on the
7094 40. A daemon listener on a wildcard IPv6 socket that also accepts IPv4
7095 connections (as happens on some IP stacks) was logged at start up time as
7096 just listening for IPv6. It now logs "IPv6 with IPv4". This differentiates
7097 it from "IPv6 and IPv4", which means that two separate sockets are being
7100 41. The debug output for gethostbyname2() or getipnodebyname() failures now
7101 says whether AF_INET or AF_INET6 was passed as an argument.
7103 42. Exiwhat output was messed up when time zones were included in log
7106 43. Exiwhat now gives more information about the daemon's listening ports,
7107 and whether -tls-on-connect was used.
7109 44. The "port" option of the smtp transport is now expanded.
7111 45. A "message" modifier in a "warn" statement in a non-message ACL was being
7112 silently ignored. Now an error message is written to the main and panic
7115 46. There's a new ACL modifier called "logwrite" which writes to a log file
7116 as soon as it is encountered.
7118 47. Added $local_user_uid and $local_user_gid at routing time.
7120 48. Exim crashed when trying to verify a sender address that was being
7123 49. Exim was recognizing only a space character after ".include". It now also
7124 recognizes a tab character.
7126 50. Fixed several bugs in the Perl script that creates the exim.8 man page by
7127 extracting the relevant information from the specification. The man page no
7128 longer contains scrambled data for the -d option, and I've added a section
7129 at the front about calling Exim under different names.
7131 51. Added "extra_headers" argument to the "mail" command in filter files.
7133 52. Redirecting mail to an unqualified address in a Sieve filter caused Exim to
7136 53. Installed eximstats 1.29.
7138 54. Added transport_filter_timeout as a generic transport option.
7140 55. Exim no longer adds an empty Bcc: header to messages that have no To: or
7141 Cc: header lines. This was required by RFC 822, but it not required by RFC
7144 56. Exim used to add From:, Date:, and Message-Id: header lines to any
7145 incoming messages that did not have them. Now it does so only if the
7146 message originates locally, that is, if there is no associated remote host
7147 address. When Resent- header lines are present, this applies to the Resent-
7148 lines rather than the non-Resent- lines.
7150 57. Drop incoming SMTP connection after too many syntax or protocol errors. The
7151 limit is controlled by smtp_max_synprot_errors, defaulting to 3.
7153 58. Messages for configuration errors now include the name of the main
7154 configuration file - useful now that there may be more than one file in a
7155 list (.included file names were always shown).
7157 59. Change 4.21/82 (run initgroups() when starting the daemon) causes problems
7158 for those rare installations that do not start the daemon as root or run it
7159 setuid root. I've cut out the call to initgroups() if the daemon is not
7162 60. The Exim user and group can now be bound into the binary as text strings
7163 that are looked up at the start of Exim's processing.
7165 61. Applied a small patch for the Interbase code, supplied by Ard Biesheuvel.
7167 62. Added $mailstore_basename variable.
7169 63. Installed patch to sieve.c from Michael Haardt.
7171 64. When Exim failed to open the panic log after failing to open the main log,
7172 the original message it was trying to log was written to stderr and debug
7173 output, but if they were not available (the usual case in production), it
7174 was lost. Now it is written to syslog before the two lines that record the
7175 failures to open the logs.
7177 65. Users' Exim filters run in subprocesses under the user's uid. It is
7178 possible for a "deliver" command or an alias in a "personal" command to
7179 provoke an address rewrite. If logging of address rewriting is configured,
7180 this fails because the process is not running as root or exim. There may be
7181 a better way of dealing with this, but for the moment (because 4.30 needs
7182 to be released), I have disabled address rewrite logging when running a
7183 filter in a non-root, non-exim process.
7189 1. The buildconfig auxiliary program wasn't quoting the value set for
7190 HEADERS_CHARSET. This caused a compilation error complaining that 'ISO' was
7191 not defined. This bug was masked in 4.22 by the effect that was fixed in
7194 2. Some messages that were rejected after a message id was allocated were
7195 shown as "incomplete" by exigrep. It no longer does this for messages that
7196 are rejected by local_scan() or the DATA or non-SMTP ACLs.
7198 3. If a Message-ID: header used a domain literal in the ID, and Exim did not
7199 have allow_domain_literals set, the ID did not get logged in the <= line.
7200 Domain literals are now always recognized in Message-ID: header lines.
7202 4. The first argument for a ${extract expansion item is the key name or field
7203 number. Leading and trailing spaces in this item were not being ignored,
7204 causing some misleading effects.
7206 5. When deliver_drop_privilege was set, single queue runner processes started
7207 manually (i.e. by the command "exim -q") or by the daemon (which uses the
7208 same command in the process it spins off) were not dropping privilege.
7210 6. When the daemon running as "exim" started a queue runner, it always
7211 re-executed Exim in the spun-off process. This is a waste of effort when
7212 deliver_drop_privilege is set. The new process now just calls the
7213 queue-runner function directly.
7219 1. Typo in the src/EDITME file: it referred to HEADERS_DECODE_TO instead of
7222 2. Change 4.21/73 introduced a bug. The pid file path set by -oP was being
7223 ignored. Though the use of -oP was forcing the writing of a pid file, it
7224 was always written to the default place.
7226 3. If the message "no IP address found for host xxxx" is generated during
7227 incoming verification, it is now followed by identification of the incoming
7228 connection (so you can more easily find what provoked it).
7230 4. Bug fix for Sieve filters: "stop" inside a block was not working properly.
7232 5. Added some features to "harden" Exim a bit more against certain attacks:
7234 (a) There is now a build-time option called FIXED_NEVER_USERS that can
7235 be put in Local/Makefile. This is like the never_users runtime option,
7236 but it cannot be overridden. The default setting is "root".
7238 (b) If ALT_CONFIG_PREFIX is defined in Local/Makefile, it specifies a
7239 prefix string with which any file named in a -C command line option
7242 (c) If ALT_CONFIG_ROOT_ONLY is defined in Local/Makefile, root privilege
7243 is retained for -C and -D only if the caller of Exim is root. Without
7244 it, the exim user may also use -C and -D and retain privilege.
7246 (d) If DISABLE_D_OPTION is defined in Local/Makefile, the use of the -D
7247 command line option is disabled.
7249 6. Macro names set by the -D option must start with an upper case letter, just
7250 like macro names defined in the configuration file.
7252 7. Added "dereference=" facility to LDAP.
7254 8. Two instances of the typo "uknown" in the source files are fixed.
7256 9. If a PERL_COMMAND setting in Local/Makefile was not at the start of a line,
7257 the Configure-Makefile script screwed up while processing it.
7259 10. Incorporated PCRE 4.4.
7261 11. The SMTP synchronization check was not operating right at the start of an
7262 SMTP session. For example, it could not catch a HELO sent before the client
7263 waited for the greeting. There is now a check for outstanding input at the
7264 point when the greeting is written. Because of the duplex, asynchronous
7265 nature of TCP/IP, it cannot be perfect - the incorrect input may be on its
7266 way, but not yet received, when the check is performed.
7268 12. Added tcp_nodelay to make it possible to turn of the setting of TCP_NODELAY
7269 on TCP/IP sockets, because this apparently causes some broken clients to
7272 13. Installed revised OS/Makefile-CYGWIN and OS/os.c-cygwin (the .h file was
7273 unchanged) from the Cygwin maintainer.
7275 14. The code for -bV that shows what is in the binary showed "mbx" when maildir
7276 was supported instead of testing for mbx. Effectively a typo.
7278 15. The spa authenticator server code was not checking that the input it
7279 received was valid base64.
7281 16. The debug output line for the "set" modifier in ACLs was not showing the
7282 name of the variable that was being set.
7284 17. Code tidy: the variable type "vtype_string" was never used. Removed it.
7286 18. Previously, a reference to $sender_host_name did not cause a DNS reverse
7287 lookup on its own. Something else was needed to trigger the lookup. For
7288 example, a match in host_lookup or the need for a host name in a host list.
7289 Now, if $sender_host_name is referenced and the host name has not yet been
7290 looked up, a lookup is performed. If the lookup fails, the variable remains
7291 empty, and $host_lookup_failed is set to "1".
7293 19. Added "eqi" as a case-independent comparison operator.
7295 20. The saslauthd authentication condition could segfault if neither service
7296 nor realm was specified.
7298 21. If an overflowing value such as "2048M" was set for message_size_limit, the
7299 error message that was logged was misleading, and incoming SMTP
7300 connections were dropped. The message is now more accurate, and temporary
7301 errors are given to SMTP connections.
7303 22. In some error situations (such as 21 above) Exim rejects all SMTP commands
7304 (except RSET) with a 421 error, until QUIT is received. However, it was
7305 failing to send a response to QUIT.
7307 23. The HELO ACL was being run before the code for helo_try_verify_hosts,
7308 which made it impossible to use "verify = helo" in the HELO ACL. The HELO
7309 ACL is now run after the helo_try_verify_hosts code.
7311 24. "{MD5}" and "{SHA1}" are now recognized as equivalent to "{md5"} and
7312 "{sha1}" in the "crypteq" expansion condition (in fact the comparison is
7313 case-independent, so other case variants are also recognized). Apparently
7314 some systems use these upper case variants.
7316 25. If more than two messages were waiting for the same host, and a transport
7317 filter was specified for the transport, Exim sent two messages over the
7318 same TCP/IP connection, and then failed with "socket operation on non-
7319 socket" when it tried to send the third.
7321 26. Added Exim::debug_write and Exim::log_write for embedded Perl use.
7323 27. The extern definition of crypt16() in expand.c was not being excluded when
7324 the OS had its own crypt16() function.
7326 28. Added bounce_return_body as a new option, and bounce_return_size_limit
7327 as a preferred synonym for return_size_limit, both as an option and as an
7330 29. Added LIBS=-liconv to OS/Makefile-OSF1.
7332 30. Changed the default configuration ACL to relax the local part checking rule
7333 for addresses that are not in any local domains. For these addresses,
7334 slashes and pipe symbols are allowed within local parts, but the sequence
7335 /../ is explicitly forbidden.
7337 31. SPA server authentication was not clearing the challenge buffer before
7340 32. log_message in a "warn" ACL statement was writing to the reject log as
7341 well as to the main log, which contradicts the documentation and doesn't
7342 seem right (because no rejection is happening). So I have stopped it.
7344 33. Added Ard Biesheuvel's lookup code for accessing an Interbase database.
7345 However, I am unable to do any testing of this.
7347 34. Fixed an infelicity in the appendfile transport. When checking directories
7348 for a mailbox, to see if any needed to be created, it was accidentally
7349 using path names with one or more superfluous leading slashes; tracing
7350 would show up entries such as stat("///home/ph10", 0xFFBEEA48).
7352 35. If log_message is set on a "discard" verb in a MAIL or RCPT ACL, its
7353 contents are added to the log line that is written for every discarded
7354 recipient. (Previously a log_message setting was ignored.)
7356 36. The ${quote: operator now quotes the string if it is empty.
7358 37. The install script runs exim in order to find its version number. If for
7359 some reason other than non-existence or emptiness, which it checks, it
7360 could not run './exim', it was installing it with an empty version number,
7361 i.e. as "exim-". This error state is now caught, and the installation is
7364 38. An argument was missing from the function that creates an error message
7365 when Exim fails to connect to the socket for saslauthd authentication.
7366 This could cause Exim to crash, or give a corrupted message.
7368 39. Added isip, isip4, and isip6 to ${if conditions.
7370 40. The ACL variables $acl_xx are now saved with the message, and can be
7371 accessed later in routers, transports, and filters.
7373 41. The new lookup type nwildlsearch is like wildlsearch, except that the key
7374 strings in the file are not string-expanded.
7376 42. If a MAIL command specified a SIZE value that was too large to fit into an
7377 int variable, the check against message_size_limit failed. Such values are
7378 now forced to INT_MAX, which is around 2Gb for a 32-bit variable. Maybe one
7379 day this will have to be increased, but I don't think I want to be around
7380 when emails are that large.
7387 1. Removed HAVE_ICONV=yes from OS/Makefile-FreeBSD, since it seems that
7388 iconv() is not standard in FreeBSD.
7390 2. Change 4.21/17 was buggy and could cause stack overwriting on a system with
7391 IPv6 enabled. The observed symptom was a segmentation fault on return from
7392 the function os_common_find_running_interfaces() in src/os.c.
7394 3. In the check_special_case() function in daemon.c I had used "errno" as an
7395 argument name, which causes warnings on some systems. This was basically a
7396 typo, since it was named "eno" in the comments!
7398 4. The code that waits for the clock to tick (at a resolution of some fraction
7399 of a second) so as to ensure message-id uniqueness was always waiting for
7400 at least one whole tick, when it could have waited for less. [This is
7401 almost certainly not relevant at current processor speeds, where it is
7402 unlikely to ever wait at all. But we try to future-proof.]
7404 5. The function that sleeps for a time interval that includes fractions of a
7405 second contained a race. It did not block SIGALRM between setting the
7406 timer, and suspending (a couple of lines later). If the interval was short
7407 and the sigsuspend() was delayed until after it had expired, the suspension
7408 never ended. On busy systems this could lead to processes getting stuck for
7411 6. Some uncommon configurations may cause a lookup to happen in a queue runner
7412 process, before it forks any delivery processes. The open lookup caching
7413 mechanism meant that the open file or database connection was passed into
7414 the delivery process. The problem was that delivery processes always tidy
7415 up cached lookup data. This could cause a problem for the next delivery
7416 process started by the queue runner, because the external queue runner
7417 process does not know about the closure. So the next delivery process
7418 still has data in the lookup cache. In the case of a file lookup, there was
7419 no problem because closing a file descriptor in a subprocess doesn't affect
7420 the parent. However, if the lookup was caching a connection to a database,
7421 the connection was closed, and the second delivery process was likely to
7422 see errors such as "PGSQL: query failed: server closed the connection
7423 unexpectedly". The problem has been fixed by closing all cached lookups
7424 in a queue runner before running a delivery process.
7426 7. Compiler warning on Linux for the second argument of iconv(), which doesn't
7427 seem to have the "const" qualifier which it has on other OS. I've
7430 8. Change 4.21/2 was too strict. It is only if there are two authenticators
7431 *of the same type* (client or server) with the same public name that an
7432 error should be diagnosed.
7434 9. When Exim looked up a host name for an IP address, but failed to find the
7435 original IP address when looking up the host name (a safety check), it
7436 output the message "<ip address> does not match any IP for NULL", which was
7437 confusing, to say the least. The bug was that the host name should have
7438 appeared instead of "NULL".
7440 10. Since release 3.03, if Exim is called by a uid other than root or the Exim
7441 user that is built into the binary, and the -C or -D options is used, root
7442 privilege is dropped before the configuration file is read. In addition,
7443 logging is switched to stderr instead of the normal log files. If the
7444 configuration then re-defines the Exim user, the unprivileged environment
7445 is probably not what is expected, so Exim logs a panic warning message (but
7448 However, if deliver_drop_privilege is set, the unprivileged state may well
7449 be exactly what is intended, so the warning has been cut out in that case,
7450 and Exim is allowed to try to write to its normal log files.
7456 1. smtp_return_error_details was not giving details for temporary sender
7457 or receiver verification errors.
7459 2. Diagnose a configuration error if two authenticators have the same public
7462 3. Exim used not to create the message log file for a message until the first
7463 delivery attempt. This could be confusing when incoming messages were held
7464 for policy or load reasons. The message log file is now created at the time
7465 the message is received, and an initial "Received" line is written to it.
7467 4. The automatically generated man page for command line options had a minor
7468 bug that caused no ill effects; however, a more serious problem was that
7469 the procedure for building the man page automatically didn't always
7470 operate. Consequently, release 4.20 contains an out-of-date version. This
7471 shouldn't happen again.
7473 5. When building Exim with embedded Perl support, the script that builds the
7474 Makefile was calling 'perl' to find its compile-time parameters, ignoring
7475 any setting of PERL_COMMAND in Local/Makefile. This is now fixed.
7477 6. The freeze_tell option was not being used for messages that were frozen on
7478 arrival, either by an ACL or by local_scan().
7480 7. Added the smtp_incomplete_transaction log selector.
7482 8. After STARTTLS, Exim was not forgetting that it had advertised AUTH, so it
7483 was accepting AUTH without a new EHLO.
7485 9. Added tls_remember_esmtp to cope with YAEB. This allows AUTH and other
7486 ESMTP extensions after STARTTLS without a new EHLO, in contravention of the
7489 10. Logging of TCP/IP connections (when configured) now happens in the main
7490 daemon process instead of the child process, so that the TCP/IP connection
7491 count is more accurate (but it can never be perfect).
7493 11. The use of "drop" in a nested ACL was not being handled correctly in the
7494 outer ACL. Now, if condition failure induced by the nested "drop" causes
7495 the outer ACL verb to deny access ("accept" or "discard" after "endpass",
7496 or "require"), the connection is dropped.
7498 12. Similarly, "discard" in a nested ACL wasn't being handled. A nested ACL
7499 that yield "discard" can now be used with an "accept" or a "discard" verb,
7500 but an error is generated for any others (because I can't see a useful way
7501 to define what should happen).
7503 13. When an ACL is read dynamically from a file (or anywhere else), the lines
7504 are now processed in the same way as lines in the Exim configuration file.
7505 In particular, continuation lines are supported.
7507 14. Added the "dnslists = a.b.c!=n.n.n.n" feature.
7509 15. Added -ti meaning -t -i.
7511 16. Check for letters, digits, hyphens, and dots in the names of dnslist
7512 domains, and warn by logging if others are found.
7514 17. At least on BSD, alignment is not guaranteed for the array of ifreq's
7515 returned from GIFCONF when Exim is trying to find the list of interfaces on
7516 a host. The code in os.c has been modified to copy each ifreq to an aligned
7517 structure in all cases.
7519 Also, in some cases, the returned ifreq's were being copied to a 'struct
7520 ifreq' on the stack, which was subsequently passed to host_ntoa(). That
7521 means the last couple of bytes of an IPv6 address could be chopped if the
7522 ifreq contained only a normal sockaddr (14 bytes storage).
7524 18. Named domain lists were not supported in the hosts_treat_as_local option.
7525 An entry such as +xxxx was not recognized, and was treated as a literal
7528 19. Ensure that header lines added by a DATA ACL are included in the reject log
7529 if the ACL subsequently rejects the message.
7531 20. Upgrade the cramtest.pl utility script to use Digest::MD5 instead of just
7532 MD5 (which is deprecated).
7534 21. When testing a filter file using -bf, Exim was writing a message when it
7535 took the sender from a "From " line in the message, but it was not doing so
7536 when it took $return_path from a Return-Path: header line. It now does.
7538 22. If the contents of a "message" modifier for a "warn" ACL verb do not begin
7539 with a valid header line field name (a series of printing characters
7540 terminated by a colon, Exim now inserts X-ACL-Warn: at the beginning.
7542 23. Changed "disc" in the source to "disk" to conform to the documentation and
7543 the book and for uniformity.
7545 24. Ignore Sendmail's -Ooption=value command line item.
7547 25. When execve() failed while trying to run a command in a pipe transport,
7548 Exim was returning EX_UNAVAILABLE (69) from the subprocess. However, this
7549 could be confused with a return value of 69 from the command itself. This
7550 has been changed to 127, the value the shell returns if it is asked to run
7551 a non-existent command. The wording for the related log line suggests a
7552 non-existent command as the problem.
7554 26. If received_header_text expands to an empty string, do not add a Received:
7555 header line to the message. (Well, it adds a token one on the spool, but
7556 marks it "old" so that it doesn't get used or transmitted.)
7558 27. Installed eximstats 1.28 (addition of -nt option).
7560 28. There was no check for failure on the call to getsockname() in the daemon
7561 code. This can fail if there is a shortage of resources on the system, with
7562 ENOMEM, for example. A temporary error is now given on failure.
7564 29. Contrary to the C standard, it seems that in some environments, the
7565 equivalent of setlocale(LC_ALL, "C") is not obeyed at the start of a C
7566 program. Exim now does this explicitly; it affects the formatting of
7567 timestamps using strftime().
7569 30. If exiqsumm was given junk data, it threw up some uninitialized variable
7570 complaints. I've now initialized all the variables, to avoid this.
7572 32. Header lines added by a system filter were not being "seen" during
7573 transport-time rewrites.
7575 33. The info_callback() function passed to OpenSSL is set up with type void
7576 (*)(SSL *, int, int), as described somewhere. However, when calling the
7577 function (actually a macro) that sets it up, the type void(*)() is
7578 expected. I've put in a cast to prevent warnings from picky compilers.
7580 34. If a DNS black list lookup found a CNAME record, but there were no A
7581 records associated with the domain it pointed at, Exim crashed.
7583 35. If a DNS black list lookup returned more than one A record, Exim ignored
7584 all but the first. It now scans all returned addresses if a particular IP
7585 value is being sought. In this situation, the contents of the
7586 $dnslist_value variable are a list of all the addresses, separated by a
7589 36. Tightened up the rules for host name lookups using reverse DNS. Exim used
7590 to accept a host name and all its aliases if the forward lookup for any of
7591 them yielded the IP address of the incoming connection. Now it accepts only
7592 those names whose forward lookup yields the correct IP address. Any other
7593 names are discarded. This closes a loophole whereby a rogue DNS
7594 administrator could create reverse DNS records to break through a
7595 wildcarded host restriction in an ACL.
7597 37. If a user filter or a system filter that ran in a subprocess used any of
7598 the numerical variables ($1, $2 etc), or $thisaddress, in a pipe command,
7599 the wrong values were passed to the pipe command ($thisaddress had the
7600 value of $0, $0 had the value of $1, etc). This bug was introduced by
7601 change 4.11/101, and not discovered because I wrote an inadequate test. :-(
7603 38. Improved the line breaking for long SMTP error messages from ACLs.
7604 Previously, if there was no break point between 40 and 75 characters, Exim
7605 left the rest of the message alone. Two changes have been made: (a) I've
7606 reduced the minimum length to 35 characters; (b) if it can't find a break
7607 point between 35 and 75 characters, it looks ahead and uses the first one
7608 that it finds. This may give the occasional overlong line, but at least the
7609 remaining text gets split now.
7611 39. Change 82 of 4.11 was unimaginative. It assumed the limit on the number of
7612 file descriptors might be low, and that setting 1000 would always raise it.
7613 It turns out that in some environments, the limit is already over 1000 and
7614 that lowering it causes trouble. So now Exim takes care not to decrease it.
7616 40. When delivering a message, the value of $return_path is set to $sender_
7617 address at the start of routing (routers may change the value). By an
7618 oversight, this default was not being set up when an address was tested by
7619 -bt or -bv, which affected the outcome if any router or filter referred to
7622 41. The idea of the "warn" ACL verb is that it adds a header or writes to the
7623 log only when "message" or "log_message" are set. However, if one of the
7624 conditions was an address verification, or a call to a nested ACL, the
7625 messages generated by the underlying test were being passed through. This
7626 no longer happens. The underlying message is available in $acl_verify_
7627 message for both "message" and "log_message" expansions, so it can be
7628 passed through if needed.
7630 42. Added RFC 2047 interpretation of header lines for $h_ expansions, with a
7631 new expansion $bh_ to give the encoded byte string without charset
7632 translation. Translation happens only if iconv() is available; HAVE_ICONV
7633 indicates this at build time. HEADERS_CHARSET gives the charset to
7634 translate to; headers_charset can change it in the configuration, and
7635 "headers charset" can change it in an individual filter file.
7637 43. Now that we have a default RFC 2047 charset (see above), the code in Exim
7638 that creates RFC 2047 encoded "words" labels them as that charset instead
7639 of always using iso-8859-1. The cases are (i) the explicit ${rfc2047:
7640 expansion operator; (ii) when Exim creates a From: line for a local
7641 message; (iii) when a header line is rewritten to include a "phrase" part.
7643 44. Nasty bug in exiqsumm: the regex to skip already-delivered addresses was
7644 buggy, causing it to skip the first lines of messages whose message ID
7645 ended in 'D'. This would not have bitten before Exim release 4.14, because
7646 message IDs were unlikely to end in 'D' before then. The effect was to have
7647 incorrect size information for certain domains.
7649 45. #include "config.h" was missing at the start of the crypt16.c module. This
7650 caused trouble on Tru64 (aka OSF1) systems, because HAVE_CRYPT16 was not
7653 46. If there was a timeout during a "random" callout check, Exim treated it as
7654 a failure of the random address, and carried on sending RSET and the real
7655 address. If the delay was just some slowness somewhere, the response to the
7656 original RCPT would be taken as a response to RSET and so on, causing
7657 mayhem of various kinds.
7659 47. Change 50 for 4.20 was a heap of junk. I don't know what I was thinking
7660 when I implemented it. It didn't allow for the fact that some option values
7661 may legitimately be negative (e.g. size_addition), and it didn't even do
7662 the right test for positive values.
7664 48. Domain names in DNS records are case-independent. Exim always looks them up
7665 in lower case. Some resolvers return domain names in exactly the case they
7666 appear in the zone file, that is, they may contain uppercase letters. Not
7667 all resolvers do this - some return always lower case. Exim was treating a
7668 change of case by a resolver as a change of domain, similar to a widening
7669 of a domain abbreviation. This triggered its re-routing code and so it was
7670 trying to route what was effectively the same domain again. This normally
7671 caused routing to fail (because the router wouldn't handle the domain
7672 twice). Now Exim checks for this case specially, and just changes the
7673 casing of the domain that it ultimately uses when it transmits the message
7676 49. Added Sieve (RFC 3028) support, courtesy of Michael Haardt's contributed
7679 50. If a filter generated a file delivery with a non-absolute name (possible if
7680 no home directory exists for the router), the forbid_file option was not
7683 51. Added '&' feature to dnslists, to provide bit mask matching in addition to
7684 the existing equality matching.
7686 52. Exim was using ints instead of ino_t variables in some places where it was
7687 dealing with inode numbers.
7689 53. If TMPDIR is defined in Local/Makefile (default in src/EDITME is
7690 TMPDIR="/tmp"), Exim checks for the presence of an environment variable
7691 called TMPDIR, and if it finds it is different, it changes its value.
7693 54. The smtp_printf() function is now made available to local_scan() so
7694 additional output lines can be written before returning. There is also an
7695 smtp_fflush() function to enable the detection of a dropped connection.
7696 The variables smtp_input and smtp_batched_input are exported to
7699 55. Changed the default runtime configuration: the message "Unknown user"
7700 has been removed from the ACL, and instead placed on the localuser router,
7701 using the cannot_route_message feature. This means that any verification
7702 failures that generate their own messages won't get overridden. Similarly,
7703 the "Unrouteable address" message that was in the ACL for unverifiable
7704 relay addresses has also been removed.
7706 56. Added hosts_avoid_esmtp to the smtp transport.
7708 57. The exicyclog script was not checking for the esoteric option
7709 CONFIGURE_FILE_USE_EUID in the Local/Makefile. It now does this, but it
7710 will work only if exicyclog is run under the appropriate euid.
7712 58. Following a discussion on the list, the rules by which Exim recognises line
7713 endings on incoming messages have been changed. The -dropcr and drop_cr
7714 options are now no-ops, retained only for backwards compatibility. The
7715 following line terminators are recognized: LF CRLF CR. However, special
7716 processing applies to CR:
7718 (i) The sequence CR . CR does *not* terminate an incoming SMTP message,
7719 nor a local message in the state where . is a terminator.
7721 (ii) If a bare CR is encountered in a header line, an extra space is added
7722 after the line terminator so as not to end the header. The reasoning
7723 behind this is that bare CRs in header lines are most likely either
7724 to be mistakes, or people trying to play silly games.
7726 59. The size of a message, as listed by "-bp" or in the Exim monitor window,
7727 was being incorrectly given as 18 bytes larger than it should have been.
7728 This is a VOB (very old bug).
7730 60. This may never have affected anything current, but just in case it has:
7731 When the local host is found other than at the start of a list of hosts,
7732 the local host, those with the same MX, and any that follow, are discarded.
7733 When the list in question was part of a longer list of hosts, the following
7734 hosts (not currently being processed) were also being discarded. This no
7735 longer happens. I'm not sure if this situation could ever has previously
7738 61. Added the "/MX" feature to lists of hosts in the manualroute and query
7741 62. Whenever Exim generates a new message, it now adds an Auto-Submitted:
7742 header. This is something that is recommended in a new Internet Draft, and
7743 is something that is documented as being done by Sendmail. There are two
7744 possible values. For messages generated by the autoreply transport, Exim
7747 Auto-Submitted: auto-replied
7749 whereas for all other generated messages (e.g. bounces) it adds
7751 Auto-Submitted: auto-generated
7753 63. The "personal" condition in filters now includes a test for the
7754 Auto-Submitted: header. If it contains the string "auto-" the message it
7755 not considered personal.
7757 64. Added rcpt_include_affixes as a generic transport option.
7759 65. Added queue_only_override (default true).
7761 66. Added the syslog_duplication option.
7763 67. If what should have been the first header line of a message consisted of
7764 a space followed by a colon, Exim was mis-interpreting it as a header line.
7765 It isn't of course - it is syntactically invalid and should therefore be
7766 treated as the start of the message body. The misbehaviour could have
7767 caused a number of strange effects, including loss of data in subsequent
7768 header lines, and spool format errors.
7770 68. Formerly, the AUTH parameter on a MAIL command was trusted only if the
7771 client host had authenticated. This control can now be exercised by an ACL
7772 for more flexibility.
7774 69. By default, callouts do not happen when testing with -bh. There is now a
7775 variant, -bhc, which does actually run the callout code, including
7776 consulting and updating the callout cache.
7778 70. Added support for saslauthd authentication, courtesy of Alexander
7781 71. If statvfs() failed on the spool or log directories while checking their
7782 size for availability, Exim confusingly gave the error "space shortage".
7783 Furthermore, in debugging mode it crashed with a floating point exception.
7784 These checks are done if check_{spool,log}_{space,inodes} are set, and when
7785 an SMTP message arrives with SIZE= on the MAIL command. As this is a really
7786 serious problem, Exim now writes to the main and panic logs when this
7787 happens, with details of the failure. It then refuses to accept the
7788 incoming message, giving the message "spool directory problem" or "log
7789 directory problem" with a 421 code for SMTP messages.
7791 72. When Exim is about to re-exec itself, it ensures that the file descriptors
7792 0, 1, and 2 exist, because some OS complain for execs without them (see
7793 ChangeLog 4.05/30). If necessary, Exim opens /dev/null to use for these
7794 descriptors. However, the code omitted to check that the open succeeded,
7795 causing mysterious errors if for some reason the permissions on /dev/null
7796 got screwed. Now Exim writes a message to the main and panic logs, and
7797 bombs out if it can't open /dev/null.
7799 73. Re-vamped the way daemon_smtp_port, local_interfaces, and -oX work and
7800 interact so that it is all more flexible. It is supposed to remain
7801 backwards compatible. Also added extra_local_interfaces.
7803 74. Invalid data sent to a SPA (NTLM) server authenticator could cause the code
7804 to bomb out with an assertion failure - to the client this appears as a
7805 connection drop. This problem occurs in the part of the code that was taken
7806 from the Samba project. Fortunately, the assertion is in a very simple
7807 function, so I have fixed this by reproducing the function inline in the
7808 one place where it is called, and arranging for authentication to fail
7809 instead of killing the process with assert().
7811 75. The SPA client code was not working when the server requested OEM rather
7812 than Unicode encoding.
7814 76. Added code to make require_files with a specific uid setting more usable in
7815 the case where statting the file as root fails - usually a non-root-mounted
7816 NFS file system. When this happens and the failure is EACCES, Exim now
7817 forks a subprocess and does the per-uid checking as the relevant uid.
7819 77. Added process_log_path.
7821 78. If log_file_path was not explicitly set, a setting of check_log_space or
7822 check_log_inodes was ignored.
7824 79. If a space check for the spool or log partitions fails, the incident is now
7825 logged. Of course, in the latter case the data may get lost...
7827 80. Added the %p formatting code to string_format() so that it can be used to
7828 print addresses in debug_print(). Adjusted all the address printing in the
7829 debugging in store.c to use %p rather than %d.
7831 81. There was a concern that a line of code in smtp_in.c could overflow a
7832 buffer if a HELO/EHLO command was given followed by 500 or so spaces. As
7833 initially expressed, the concern was not well-founded, because trailing
7834 spaces are removed early. However, if the trailing spaces were followed by
7835 a NULL, they did not get removed, so the overflow was possible. Two fixes
7838 (a) I re-wrote the offending code in a cleaner fashion.
7839 (b) If an incoming SMTP command contains a NULL character, it is rejected
7842 82. When Exim changes uid/gid to the Exim user at daemon start time, it now
7843 runs initgroups(), so that if the Exim user is in any additional groups,
7844 they will be used during message reception.
7850 The change log for 4.20 and earlier releases has been archived.
git://git.exim.org / exim.git / blob