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 Avoid costly startup code when not strictly needed. This reduces time
10 for some exim process initialisations. It does mean that the logging
11 of TLS configuration problems is only done for the daemon startup.
13 JH/02 Early-pipelining support code is now included unless disabled in Makefile.
15 JH/03 DKIM verification defaults no long accept sha1 hashes, to conform to
16 RFC 8301. They can still be enabled, using the dkim_verify_hashes main
19 JH/04 Support CHUNKING from an smtp transport using a transport_filter, when
20 DKIM signing is being done. Previously a transport_filter would always
21 disable CHUNKING, falling back to traditional DATA.
23 JH/05 Regard command-line receipients as tainted.
25 JH/06 Bug 340: Remove the daemon pid file on exit, whe due to SIGTERM.
27 JH/07 Bug 2489: Fix crash in the "pam" expansion condition. It seems that the
28 PAM library frees one of the arguments given to it, despite the
29 documentation. Therefore a plain malloc must be used.
31 JH/08 Bug 2491: Use tainted buffers for the transport smtp context. Previously
32 on-stack buffers were used, resulting in a taint trap when DSN information
33 copied from a received message was written into the buffer.
35 JH/09 Bug 2493: Harden ARC verify against Outlook, whick has been seen to mix
36 the ordering of its ARC headers. This caused a crash.
38 JH/10 Bug 2492: Use tainted memory for retry record when needed. Previously when
39 a new record was being constructed with information from the peer, a trap
42 JH/11 Bug 2494: Unset the default for dmarc_tld_file. Previously a naiive
43 installation would get error messages from DMARC verify, when it hit the
44 nonexistent file indicated by the default. Distros wanting DMARC enabled
45 should both provide the file and set the option.
46 Also enforce no DMARC verification for command-line sourced messages.
48 JH/12 Fix an uninitialised flag in early-pipelining. Previously connections
49 could, depending on the platform, hang at the STARTTLS response.
51 JH/13 Bug 2498: Reset a counter used for ARC verify before handling another
52 message on a connection. Previously if one message had ARC headers and
53 the following one did not, a crash could result when adding an
54 Authentication-Results: header.
56 JH/14 Bug 2500: Rewind some of the common-coding in string handling between the
57 Exim main code and Exim-related utities. The introduction of taint
58 tracking also did many adjustments to string handling. Since then, eximon
59 frequently terminated with an assert failure.
61 JH/15 When PIPELINING, synch after every hundred or so RCPT commands sent and
62 check for 452 responses. This slightly helps the inefficieny of doing
63 a large alias-expansion into a recipient-limited target. The max_rcpt
64 transport option still applies (and at the current default, will override
65 the new feature). The check is done for either cause of synch, and forces
66 a fast-retry of all 452'd recipients using a new MAIL FROM on the same
67 connection. The new facility is not tunable at this time.
69 JH/16 Fix the variables set by the gsasl authenticator. Previously a pointer to
70 library live data was being used, so the results became garbage. Make
71 copies while it is still usable.
73 JH/17 Logging: when the deliver_time selector ise set, include the DT= field
74 on delivery deferred (==) and failed (**) lines (if a delivery was
75 attemtped). Previously it was only on completion (=>) lines.
77 JH/18 Authentication: the gsasl driver not provides the $authN variables in time
78 for the expansion of the server_scram_iter and server_scram_salt options.
80 WB/01 SPF: DNS lookups for the obsolete SPF RR type done by the libspf2 library
81 are now specifically given a NO_DATA response without hitting the system
82 resolver. The library goes on to do the now-standard TXT lookup.
83 Use of dnsdb lookups is not affected.
85 JH/19 Bug 2507: Modules: on handling a dynamic-module (lookups) open failure,
86 only retrieve the errormessage once. Previously two calls to dlerror()
87 were used, and the second one (for mainlog/paniclog) retrieved null
94 JH/01 OpenSSL: With debug enabled output keying information sufficient, server
95 side, to decode a TLS 1.3 packet capture.
97 JH/02 OpenSSL: Suppress the sending of (stateful) TLS1.3 session tickets.
98 Previously the default library behaviour applied, sending two, each in
101 JH/03 Debug output for ACL now gives the config file name and line number for
104 JH/04 The default received_header_text now uses the RFC 8314 tls cipher clause.
106 JH/05 DKIM: ensure that dkim_domain elements are lowercased before use.
108 JH/06 Fix buggy handling of autoreply bounce_return_size_limit, and a possible
109 buffer overrun for (non-chunking) other transports.
111 JH/07 GnuTLS: Our use of late (post-handshake) certificate verification, under
112 TLS1.3, means that a server rejecting a client certificate is not visible
113 to the client until the first read of encrypted data (typically the
114 response to EHLO). Add detection for that case and treat it as a failed
115 TLS connection attempt, so that the normal retry-in-clear can work (if
116 suitably configured).
118 JB/01 Bug 2375: fix expansions of 822 addresses having comments in local-part
119 and/or domain. Found and fixed by Jason Betts.
121 JH/08 Add hardening against SRV & TLSA lookups the hit CNAMEs (a nonvalid
122 configuration). If a CNAME target was not a wellformed name pattern, a
125 JH/09 Logging: Fix initial listening-on line for multiple ports for an IP when
126 the OS reports them interleaved with other addresses.
128 JH/10 OpenSSL: Fix aggregation of messages. Previously, when PIPELINING was
129 used both for input and for a verify callout, both encrypted, SMTP
130 responses being sent by the server could be lost. This resulted in
131 dropped connections and sometimes bounces generated by a peer sending
134 JH/11 Harden plaintext authenticator against a badly misconfigured client-send
135 string. Previously it was possible to cause undefined behaviour in a
136 library routine (usually a crash). Found by "zerons".
138 JH/12 Bug 2384: fix "-bP smtp_receive_timeout". Previously it returned no
141 JH/13 Bug 2386: Fix builds with Dane under LibreSSL 2.9.0 onward. Some old
142 API was removed, so update to use the newer ones.
144 JH/14 Bug 1891: Close the log file if receiving a non-smtp message, without
145 any timeout set, is taking a long time. Previously we would hang on to a
146 rotated logfile "forever" if the input was arriving with long gaps
147 (a previous attempt to fix addressed lack, for a long time, of initial
150 HS/01 Bug 2390: Use message_id for tempfile creation to avoid races in a
151 shared (NFS) environment. The length of the tempfile name is now
152 4 + 16 ("hdr.$message_exim_id") which might break on file
153 systems which restrict the file name length to lower values.
156 HS/02 Bug 2390: Use message_id for tempfile creation to avoid races in a
157 shared (NFS) environment.
159 HS/03 Bug 2392: exigrep does case sensitive *option* processing (as it
160 did for all versions <4.90). Notably -M, -m, --invert, -I may be
163 JH/15 Use unsigned when creating bitmasks in macros, to avoid build errors
164 on some platforms for bit 31.
166 JH/16 GnuTLS: rework ciphersuite strings under recent library versions. Thanks
167 to changes apparently associated with TLS1.3 handling some of the APIs
168 previously used were either nonfunctional or inappropriate. Strings
169 like TLS1.3:ECDHE_SECP256R1__RSA_PSS_RSAE_SHA256__AES_256_GCM__AEAD:256
170 and TLS1.2:ECDHE_SECP256R1__RSA_SHA256__AES_128_CBC__SHA256:128 replace
171 the previous TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256 .
172 This affects log line X= elements, the $tls_{in,out}_cipher variables,
173 and the use of specific cipher names in the encrypted= ACL condition.
175 JH/17 OpenSSL: the default openssl_options now disables ssl_v3.
177 JH/18 GnuTLS: fix $tls_out_ocsp under hosts_request_ocsp. Previously the
178 verification result was not updated unless hosts_require_ocsp applied.
180 JH/19 Bug 2398: fix listing of a named-queue. Previously, even with the option
181 queue_list_requires_admin set to false, non-admin users were denied the
184 JH/20 Bug 2389: fix server advertising of usable certificates, under GnuTLS in
185 directory-of-certs mode. Previously they were advertised despite the
188 JH/21 The smtp transport option "hosts_noproxy_tls" is now unset by default.
189 A single TCP connection by a client will now hold a TLS connection open
190 for multiple message deliveries, by default. Previoud the default was to
193 JH/22 The smtp transport option "hosts_try_dane" now enables all hosts by
194 default. If built with the facility, DANE will be used. The facility
195 SUPPORT_DANE is now enabled in the prototype build Makefile "EDITME".
197 JH/23 The build default is now for TLS to be included; the SUPPORT_TLS define
198 is replaced with DISABLE_TLS. Either USE_GNUTLS or (the new) USE_OPENSSL
199 must be defined and you must still, unless you define DISABLE_TLS, manage
200 the the include-dir and library-file requirements that go with that
201 choice. Non-TLS builds are still supported.
203 JH/24 Fix duplicated logging of peer name/address, on a transport connection-
206 JH/25 The smtp transport option "hosts_try_fastopen" now enables all hosts by
207 default. If the platform supports and has the facility enabled, it will
208 be requested on all coneections.
210 JH/26 The PIPE_CONNECT facility is promoted from experimental status and is now
211 controlled by the build-time option SUPPORT_PIPE_CONNECT.
213 PP/01 Unbreak heimdal_gssapi, broken in 4.92.
215 JH/27 Bug 2404: Use the main-section configuration option "dsn_from" for
216 success-DSN messages. Previously the From: header was always the default
217 one for these; the option was ignored.
219 JH/28 Fix the timeout on smtp response to apply to the whole response.
220 Previously it was reset for every read, so a teergrubing peer sending
221 single bytes within the time limit could extend the connection for a
222 long time. Credit to Qualsys Security Advisory Team for the discovery.
224 JH/29 Fix DSN Final-Recipient: field. Previously it was the post-routing
225 delivery address, which leaked information of the results of local
226 forwarding. Change to the original envelope recipient address, per
229 JH/30 Bug 2411: Fix DSN generation when RFC 3461 failure notification is
230 requested. Previously not bounce was generated and a log entry of
231 error ignored was made.
233 JH/31 Avoid re-expansion in ${sort } expansion. (CVE-2019-13917)
235 JH/32 Introduce a general tainting mechanism for values read from the input
236 channel, and values derived from them. Refuse to expand any tainted
237 values, to catch one form of exploit.
239 JH/33 Bug 2413: Fix dkim_strict option. Previously the expansion result
240 was unused and the unexpanded text used for the test. Found and
241 fixed by Ruben Jenster.
243 JH/34 Fix crash after TLS shutdown. When the TCP/SMTP channel was left open,
244 an attempt to use a TLS library read routine dereffed a nul pointer,
247 JH/35 Bug 2409: filter out-of-spec chars from callout response before using
248 them in our smtp response.
250 JH/36 Have the general router option retry_use_local_part default to true when
251 any of the restrictive preconditions are set (to anything). Previously it
252 was only for check_local user. The change removes one item of manual
253 configuration which is required for proper retries when a remote router
254 handles a subset of addresses for a domain.
256 JH/37 Appendfile: when evaluating quota use (non-quota_size_regex) take the file
257 link count into consideration.
259 HS/04 Fix handling of very log lines in -H files. If a -<key> <value> line
260 caused the extension of big_buffer, the following lines were ignored.
262 JH/38 Bug 1395: Teach the DNS negative-cache about TTL value from the SOA in
263 accordance with RFC 2308. Previously there was no expiry, so a longlived
264 receive process (eg. due to ACL delays) versus a short SOA value could
267 HS/05 Handle trailing backslash gracefully. (CVE-2019-15846)
269 JH/39 Promote DMARC support to mainline.
271 JH/40 Bug 2452: Add a References: header to DSNs.
273 JH/41 With GnuTLS 3.6.0 (and later) do not attempt to manage Diffie-Hellman
274 parameters. The relevant library call is documented as "Deprecated: This
275 function is unnecessary and discouraged on GnuTLS 3.6.0 or later. Since
276 3.6.0, DH parameters are negotiated following RFC7919."
278 HS/06 Change the default of dnssec_request_domains to "*"
280 JH/42 Bug 2545: Fix CHUNKING for all RCPT commands rejected. Previously we
281 carried on and emitted a BDAT command, even when PIPELINING was not
284 JH/43 Bug 2465: Fix taint-handling in dsearch lookup. Previously a nontainted
285 buffer was used for the filename, resulting in a trap when tainted
286 arguments (eg. $domain) were used.
288 JH/44 With OpenSSL 1.1.1 (onwards) disable renegotiation for TLS1.2 and below;
289 recommended to avoid a possible server-load attack. The feature can be
290 re-enabled via the openssl_options main cofiguration option.
292 JH/45 local_scan API: documented the current smtp_printf() call. This changed
293 for version 4.90 - adding a "more data" boolean to the arguments.
294 Bumped the ABI version number also, this having been missed previously;
295 release versions 4.90 to 4.92.3 inclusive were effectively broken in
296 respect of usage of smtp_printf() by either local_scan code or libraries
297 accessed via the ${dlfunc } expansion item. Both will need coding
298 adjustment for any calls to smtp_printf() to match the new function
299 signature; a FALSE value for the new argument is always safe.
301 JH/46 FreeBSD: fix use of the sendfile() syscall. The shim was not updating
302 the file-offset (which the Linux syscall does, and exim expects); this
303 resulted in an indefinite loop.
305 JH/47 ARC: fix crash in signing, triggered when a configuration error failed
306 to do ARC verification. The Authentication-Results: header line added
307 by the configuration then had no ARC item.
313 JH/01 Remove code calling the customisable local_scan function, unless a new
314 definition "HAVE_LOCAL_SCAN=yes" is present in the Local/Makefile.
316 JH/02 Bug 1007: Avoid doing logging from signal-handlers, as that can result in
317 non-signal-safe functions being used.
319 JH/03 Bug 2269: When presented with a received message having a stupidly large
320 number of DKIM-Signature headers, disable DKIM verification to avoid
321 a resource-consumption attack. The limit is set at twenty.
323 JH/04 Add variables $arc_domains, $arc_oldest_pass for ARC verify. Fix the
324 report of oldest_pass in ${authres } in consequence, and separate out
325 some descriptions of reasons for verification fail.
327 JH/05 Bug 2273: Cutthrough delivery left a window where the received messsage
328 files in the spool were present and unlocked. A queue-runner could spot
329 them, resulting in a duplicate delivery. Fix that by doing the unlock
330 after the unlink. Investigation by Tim Stewart. Take the opportunity to
331 add more error-checking on spoolfile handling while that code is being
334 PP/01 Refuse to open a spool data file (*-D) if it's a symlink.
335 No known attacks, no CVE, this is defensive hardening.
337 JH/06 Bug 2275: The MIME ACL unlocked the received message files early, and
338 a queue-runner could start a delivery while other operations were ongoing.
339 Cutthrough delivery was a common victim, resulting in duplicate delivery.
340 Found and investigated by Tim Stewart. Fix by using the open message data
341 file handle rather than opening another, and not locally closing it (which
342 releases a lock) for that case, while creating the temporary .eml format
343 file for the MIME ACL. Also applies to "regex" and "spam" ACL conditions.
345 JH/07 Bug 177: Make a random-recipient callout success visible in ACL, by setting
346 $sender_verify_failure/$recipient_verify_failure to "random".
348 JH/08 When generating a selfsigned cert, use serial number 1 since zero is not
351 JH/09 Bug 2274: Fix logging of cmdline args when starting in an unlinked cwd.
352 Previously this would segfault.
354 JH/10 Fix ARC signing for case when DKIM signing failed. Previously this would
357 JH/11 Bug 2264: Exim now only follows CNAME chains one step by default. We'd
358 like zero, since the resolver should be doing this for us, But we need one
359 as a CNAME but no MX presence gets the CNAME returned; we need to check
360 that doesn't point to an MX to declare it "no MX returned" rather than
361 "error, loop". A new main option is added so the older capability of
362 following some limited number of chain links is maintained.
364 JH/12 Add client-ip info to non-pass iprev ${authres } lines.
366 JH/13 For receent Openssl versions (1.1 onward) use modern generic protocol
367 methods. These should support TLS 1.3; they arrived with TLS 1.3 and the
368 now-deprecated earlier definitions used only specified the range up to TLS
369 1.2 (in the older-version library docs).
371 JH/14 Bug 2284: Fix DKIM signing for body lines starting with a pair of dots.
373 JH/15 Rework TLS client-side context management. Stop using a global, and
374 explicitly pass a context around. This enables future use of TLS for
375 connections to service-daemons (eg. malware scanning) while a client smtp
376 connection is using TLS; with cutthrough connections this is quite likely.
378 JH/16 Fix ARC verification to do AS checks in reverse order.
380 JH/17 Support a "tls" option on the ${readsocket } expansion item.
382 JH/18 Bug 2287: Fix the protocol name (eg utf8esmtp) for multiple messages
383 using the SMTPUTF8 option on their MAIL FROM commands, in one connection.
384 Previously the "utf8" would be re-prepended for every additional message.
386 JH/19 Reject MAIL FROM commands with SMTPUTF8 when the facility was not advertised.
387 Previously thery were accepted, resulting in issues when attempting to
388 forward messages to a non-supporting MTA.
390 PP/02 Let -n work with printing macros too, not just options.
392 JH/20 Bug 2296: Fix cutthrough for >1 address redirection. Previously only
393 one parent address was copied, and bogus data was used at delivery-logging
394 time. Either a crash (after delivery) or bogus log data could result.
395 Discovery and analysis by Tim Stewart.
397 PP/03 Make ${utf8clean:} expansion operator detect incomplete final character.
398 Previously if the string ended mid-character, we did not insert the
399 promised '?' replacement.
401 PP/04 Documentation: current string operators work on bytes, not codepoints.
403 JH/21 Change as many as possible of the global flags into one-bit bitfields; these
404 should pack well giving a smaller memory footprint so better caching and
405 therefore performance. Group the declarations where this can't be done so
406 that the byte-sized flag variables are not interspersed among pointer
407 variables, giving a better chance of good packing by the compiler.
409 JH/22 Bug 1896: Fix the envelope from for DMARC forensic reports to be possibly
410 non-null, to avoid issues with sites running BATV. Previously reports were
411 sent with an empty envelope sender so looked like bounces.
413 JH/23 Bug 2318: Fix the noerror command within filters. It wasn't working.
414 The ignore_error flag wasn't being returned from the filter subprocess so
415 was not set for later routers. Investigation and fix by Matthias Kurz.
417 JH/24 Bug 2310: Raise a msg:fail:internal event for each undelivered recipient,
418 and a msg:complete for the whole, when a message is manually removed using
419 -Mrm. Developement by Matthias Kurz, hacked on by JH.
421 JH/25 Avoid fixed-size buffers for pathnames in DB access. This required using
422 a "Gnu special" function, asprintf() in the DB utility binary builds; I
423 hope that is portable enough.
425 JH/26 Bug 2311: Fix DANE-TA verification under GnuTLS. Previously it was also
426 requiring a known-CA anchor certificate; make it now rely entirely on the
427 TLSA as an anchor. Checking the name on the leaf cert against the name
428 on the A-record for the host is still done for TA (but not for EE mode).
430 JH/27 Fix logging of proxy address. Previously, a pointless "PRX=[]:0" would be
431 included in delivery lines for non-proxied connections, when compiled with
432 SUPPORT_SOCKS and running with proxy logging enabled.
434 JH/28 Bug 2314: Fire msg:fail:delivery event even when error is being ignored.
435 Developement by Matthias Kurz, tweaked by JH. While in that bit of code,
436 move the existing event to fire before the normal logging of message
437 failure so that custom logging is bracketed by normal logging.
439 JH/29 Bug 2322: A "fail" command in a non-system filter (file) now fires the
440 msg:fail:internal event. Developement by Matthias Kurz.
442 JH/30 Bug 2329: Increase buffer size used for dns lookup from 2k, which was
443 far too small for todays use of crypto signatures stored there. Go all
444 the way to the max DNS message size of 64kB, even though this might be
445 overmuch for IOT constrained device use.
447 JH/31 Fix a bad use of a copy function, which could be used to pointlessly
448 copy a string over itself. The library routine is documented as not
449 supporting overlapping copies, and on MacOS it actually raised a SIGABRT.
451 JH/32 For main options check_spool_space and check_inode_space, where the
452 platform supports 64b integers, support more than the previous 2^31 kB
453 (i.e. more than 2 TB). Accept E, P and T multipliers in addition to
454 the previous G, M, k.
456 JH/33 Bug 2338: Fix the cyrus-sasl authenticator to fill in the
457 $authenticated_fail_id variable on authentication failure. Previously
460 JH/34 Increase RSA keysize of autogen selfsign cert from 1024 to 2048. RHEL 8.0
461 OpenSSL didn't want to use such a weak key. Do for GnuTLS also, and for
462 more-modern GnuTLS move from GNUTLS_SEC_PARAM_LOW to
463 GNUTLS_SEC_PARAM_MEDIUM.
465 JH/35 OpenSSL: fail the handshake when SNI processing hits a problem, server
466 side. Previously we would continue as if no SNI had been received.
468 JH/36 Harden the handling of string-lists. When a list consisted of a sole
469 "<" character, which should be a list-separator specification, we walked
470 off past the nul-terimation.
472 JH/37 Bug 2341: Send "message delayed" warning MDNs (restricted to external
473 causes) even when the retry time is not yet met. Previously they were
474 not, meaning that when (say) an account was over-quota and temp-rejecting,
475 and multiple senders' messages were queued, only one sender would get
476 notified on each configured delay_warning cycle.
478 JH/38 Bug 2351: Log failures to extract envelope addresses from message headers.
480 JH/39 OpenSSL: clear the error stack after an SSL_accept(). With anon-auth
481 cipher-suites, an error can be left on the stack even for a succeeding
482 accept; this results in impossible error messages when a later operation
485 AM/01 Bug 2359: GnuTLS: repeat lowlevel read and write operations while they
486 return error codes indicating retry. Under TLS1.3 this becomes required.
488 JH/40 Fix the feature-cache refresh for EXPERIMENTAL_PIPE_CONNECT. Previously
489 it only wrote the new authenticators, resulting in a lack of tracking of
490 peer changes of ESMTP extensions until the next cache flush.
492 JH/41 Fix the loop reading a message header line to check for integer overflow,
493 and more-often against header_maxsize. Previously a crafted message could
494 induce a crash of the recive process; now the message is cleanly rejected.
496 JH/42 Bug 2366: Fix the behaviour of the dkim_verify_signers option. It had
497 been totally disabled for all of 4.91. Discovery and fix by "Mad Alex".
503 GF/01 DEFER rather than ERROR on redis cluster MOVED response.
504 When redis_servers is set to a list of > 1 element, and the Redis servers
505 in that list are in cluster configuration, convert the REDIS_REPLY_ERROR
506 case of MOVED into a DEFER case instead, thus moving the query onto the
507 next server in the list. For a cluster of N elements, all N servers must
508 be defined in redis_servers.
510 GF/02 Catch and remove uninitialized value warning in exiqsumm
511 Check for existence of @ARGV before looking at $ARGV[0]
513 JH/01 Replace the store_release() internal interface with store_newblock(),
514 which internalises the check required to safely use the old one, plus
515 the allocate and data copy operations duplicated in both (!) of the
516 extant use locations.
518 JH/02 Disallow '/' characters in queue names specified for the "queue=" ACL
519 modifier. This matches the restriction on the commandline.
521 JH/03 Fix pgsql lookup for multiple result-tuples with a single column.
522 Previously only the last row was returned.
524 JH/04 Bug 2217: Tighten up the parsing of DKIM signature headers. Previously
525 we assumed that tags in the header were well-formed, and parsed the
526 element content after inspecting only the first char of the tag.
527 Assumptions at that stage could crash the receive process on malformed
530 JH/05 Bug 2215: Fix crash associated with dnsdb lookup done from DKIM ACL.
531 While running the DKIM ACL we operate on the Permanent memory pool so that
532 variables created with "set" persist to the DATA ACL. Also (at any time)
533 DNS lookups that fail create cache records using the Permanent pool. But
534 expansions release any allocations made on the current pool - so a dnsdb
535 lookup expansion done in the DKIM ACL releases the memory used for the
536 DNS negative-cache, and bad things result. Solution is to switch to the
537 Main pool for expansions.
538 While we're in that code, add checks on the DNS cache during store_reset,
539 active in the testsuite.
540 Problem spotted, and debugging aided, by Wolfgang Breyha.
542 JH/06 Fix issue with continued-connections when the DNS shifts unreliably.
543 When none of the hosts presented to a transport match an already-open
544 connection, close it and proceed with the list. Previously we would
545 queue the message. Spotted by Lena with Yahoo, probably involving
548 JH/07 Bug 2214: Fix SMTP responses resulting from non-accept result of MIME ACL.
549 Previously a spurious "250 OK id=" response was appended to the proper
552 JH/08 The "support for" informational output now, which built with Content
553 Scanning support, has a line for the malware scanner interfaces compiled
554 in. Interface can be individually included or not at build time.
556 JH/09 The "aveserver", "kavdaemon" and "mksd" interfaces are now not included
557 by the template makefile "src/EDITME". The "STREAM" support for an older
558 ClamAV interface method is removed.
560 JH/10 Bug 2223: Fix mysql lookup returns for the no-data case (when the number of
561 rows affected is given instead).
563 JH/11 The runtime Berkeley DB library version is now additionally output by
564 "exim -d -bV". Previously only the compile-time version was shown.
566 JH/12 Bug 2230: Fix cutthrough routing for nonfirst messages in an initiating
567 SMTP connection. Previously, when one had more receipients than the
568 first, an abortive onward connection was made. Move to full support for
569 multiple onward connections in sequence, handling cutthrough connection
570 for all multi-message initiating connections.
572 JH/13 Bug 2229: Fix cutthrough routing for nonstandard port numbers defined by
573 routers. Previously, a multi-recipient message would fail to match the
574 onward-connection opened for the first recipient, and cause its closure.
576 JH/14 Bug 2174: A timeout on connect for a callout was also erroneously seen as
577 a timeout on read on a GnuTLS initiating connection, resulting in the
578 initiating connection being dropped. This mattered most when the callout
579 was marked defer_ok. Fix to keep the two timeout-detection methods
582 JH/15 Relax results from ACL control request to enable cutthrough, in
583 unsupported situations, from error to silently (except under debug)
584 ignoring. This covers use with PRDR, frozen messages, queue-only and
587 HS/01 Fix Buffer overflow in base64d() (CVE-2018-6789)
589 JH/16 Fix bug in DKIM verify: a buffer overflow could corrupt the malloc
590 metadata, resulting in a crash in free().
592 PP/01 Fix broken Heimdal GSSAPI authenticator integration.
593 Broken in f2ed27cf5, missing an equals sign for specified-initialisers.
594 Broken also in d185889f4, with init system revamp.
596 JH/17 Bug 2113: Fix conversation closedown with the Avast malware scanner.
597 Previously we abruptly closed the connection after reading a malware-
598 found indication; now we go on to read the "scan ok" response line,
601 JH/18 Bug 2239: Enforce non-usability of control=utf8_downconvert in the mail
602 ACL. Previously, a crash would result.
604 JH/19 Speed up macro lookups during configuration file read, by skipping non-
605 macro text after a replacement (previously it was only once per line) and
606 by skipping builtin macros when searching for an uppercase lead character.
608 JH/20 DANE support moved from Experimental to mainline. The Makefile control
609 for the build is renamed.
611 JH/21 Fix memory leak during multi-message connections using STARTTLS. A buffer
612 was allocated for every new TLS startup, meaning one per message. Fix
613 by only allocating once (OpenSSL) or freeing on TLS-close (GnuTLS).
615 JH/22 Bug 2236: When a DKIM verification result is overridden by ACL, DMARC
616 reported the original. Fix to report (as far as possible) the ACL
617 result replacing the original.
619 JH/23 Fix memory leak during multi-message connections using STARTTLS under
620 OpenSSL. Certificate information is loaded for every new TLS startup,
621 and the resources needed to be freed.
623 JH/24 Bug 2242: Fix exim_dbmbuild to permit directoryless filenames.
625 JH/25 Fix utf8_downconvert propagation through a redirect router. Previously it
628 JH/26 Bug 2253: For logging delivery lines under PRDR, append the overall
629 DATA response info to the (existing) per-recipient response info for
630 the "C=" log element. It can have useful tracking info from the
631 destination system. Patch from Simon Arlott.
633 JH/27 Bug 2251: Fix ldap lookups that return a single attribute having zero-
634 length value. Previously this would segfault.
636 HS/02 Support Avast multiline protoocol, this allows passing flags to
637 newer versions of the scanner.
639 JH/28 Ensure that variables possibly set during message acceptance are marked
640 dead before release of memory in the daemon loop. This stops complaints
641 about them when the debug_store option is enabled. Discovered specifically
642 for sender_rate_period, but applies to a whole set of variables.
643 Do the same for the queue-runner and queue-list loops, for variables set
644 from spool message files. Do the same for the SMTP per-message loop, for
645 certain variables indirectly set in ACL operations.
647 JH/29 Bug 2250: Fix a longstanding bug in heavily-pipelined SMTP input (such
648 as a multi-recipient message from a mailinglist manager). The coding had
649 an arbitrary cutoff number of characters while checking for more input;
650 enforced by writing a NUL into the buffer. This corrupted long / fast
651 input. The problem was exposed more widely when more pipelineing of SMTP
652 responses was introduced, and one Exim system was feeding another.
653 The symptom is log complaints of SMTP syntax error (NUL chars) on the
654 receiving system, and refused recipients seen by the sending system
655 (propating to people being dropped from mailing lists).
656 Discovered and pinpointed by David Carter.
658 JH/30 The (EXPERIMENTAL_DMARC) variable $dmarc_ar_header is withdrawn, being
659 replaced by the ${authresults } expansion.
661 JH/31 Bug 2257: Fix pipe transport to not use a socket-only syscall.
663 HS/03 Set a handler for SIGTERM and call exit(3) if running as PID 1. This
664 allows proper process termination in container environments.
666 JH/32 Bug 2258: Fix spool_wireformat in combination with LMTP transport.
667 Previously the "final dot" had a newline after it; ensure it is CR,LF.
669 JH/33 SPF: remove support for the "spf" ACL condition outcome values "err_temp"
670 and "err_perm", deprecated since 4.83 when the RFC-defined words
671 "temperror" and "permerror" were introduced.
673 JH/34 Re-introduce enforcement of no cutthrough delivery on transports having
674 transport-filters or DKIM-signing. The restriction was lost in the
675 consolidation of verify-callout and delivery SMTP handling.
676 Extend the restriction to also cover ARC-signing.
678 JH/35 Cutthrough: for a final-dot response timeout (and nonunderstood responses)
679 in defer=pass mode supply a 450 to the initiator. Previously the message
682 PP/02 DANE: add dane_require_tls_ciphers SMTP Transport option; if unset,
683 tls_require_ciphers is used as before.
685 HS/03 Malware Avast: Better match the Avast multiline protocol. Add
686 "pass_unscanned". Only tmpfails from the scanner are written to
687 the paniclog, as they may require admin intervention (permission
688 denied, license issues). Other scanner errors (like decompression
689 bombs) do not cause a paniclog entry.
691 JH/36 Fix reinitialisation of DKIM logging variable between messages.
692 Previously it was possible to log spurious information in receive log
695 JH/37 Bug 2255: Revert the disable of the OpenSSL session caching. This
696 triggered odd behaviour from Outlook Express clients.
698 PP/03 Add util/renew-opendmarc-tlds.sh script for safe renewal of public
701 JH/38 DKIM: accept Ed25519 pubkeys in SubjectPublicKeyInfo-wrapped form,
702 since the IETF WG has not yet settled on that versus the original
703 "bare" representation.
705 JH/39 Fix syslog logging for syslog_timestamp=no and log_selector +millisec.
706 Previously the millisecond value corrupted the output.
707 Fix also for syslog_pid=no and log_selector +pid, for which the pid
708 corrupted the output.
714 JH/01 Rework error string handling in TLS interface so that the caller in
715 more cases is responsible for logging. This permits library-sourced
716 string to be attached to addresses during delivery, and collapses
717 pairs of long lines into single ones.
719 PP/01 Allow PKG_CONFIG_PATH to be set in Local/Makefile and use it correctly
720 during configuration. Wildcards are allowed and expanded.
722 JH/02 Rework error string handling in DKIM to pass more info back to callers.
723 This permits better logging.
725 JH/03 Rework the transport continued-connection mechanism: when TLS is active,
726 do not close it down and have the child transport start it up again on
727 the passed-on TCP connection. Instead, proxy the child (and any
728 subsequent ones) for TLS via a unix-domain socket channel. Logging is
729 affected: the continued delivery log lines do not have any DNSSEC, TLS
730 Certificate or OCSP information. TLS cipher information is still logged.
732 JH/04 Shorten the log line for daemon startup by collapsing adjacent sets of
733 identical IP addresses on different listening ports. Will also affect
736 PP/02 Bug 2070: uClibc defines __GLIBC__ without providing glibc headers;
737 add noisy ifdef guards to special-case this sillyness.
738 Patch from Bernd Kuhls.
740 JH/05 Tighten up the checking in isip4 (et al): dotted-quad components larger
741 than 255 are no longer allowed.
743 JH/06 Default openssl_options to include +no_ticket, to reduce load on peers.
744 Disable the session-cache too, which might reduce our load. Since we
745 currrectly use a new context for every connection, both as server and
746 client, there is no benefit for these.
747 GnuTLS appears to not support tickets server-side by default (we don't
748 call gnutls_session_ticket_enable_server()) but client side is enabled
749 by default on recent versions (3.1.3 +) unless the PFS priority string
752 PP/03 Add $SOURCE_DATE_EPOCH support for reproducible builds, per spec at
753 <https://reproducible-builds.org/specs/source-date-epoch/>.
755 JH/07 Fix smtp transport use of limited max_rcpt under mua_wrapper. Previously
756 the check for any unsuccessful recipients did not notice the limit, and
757 erroneously found still-pending ones.
759 JH/08 Pipeline CHUNKING command and data together, on kernels that support
760 MSG_MORE. Only in-clear (not on TLS connections).
762 JH/09 Avoid using a temporary file during transport using dkim. Unless a
763 transport-filter is involved we can buffer the headers in memory for
764 creating the signature, and read the spool data file once for the
765 signature and again for transmission.
767 JH/10 Enable use of sendfile in Linux builds as default. It was disabled in
768 4.77 as the kernel support then wasn't solid, having issues in 64bit
769 mode. Now, it's been long enough. Add support for FreeBSD also.
771 JH/11 Bug 2104: Fix continued use of a transport connection with TLS. In the
772 case where the routing stage had gathered several addresses to send to
773 a host before calling the transport for the first, we previously failed
774 to close down TLS in the old transport process before passing the TCP
775 connection to the new process. The new one sent a STARTTLS command
776 which naturally failed, giving a failed delivery and bloating the retry
777 database. Investigation and fix prototype from Wolfgang Breyha.
779 JH/12 Fix check on SMTP command input synchronisation. Previously there were
780 false-negatives in the check that the sender had not preempted a response
781 or prompt from Exim (running as a server), due to that code's lack of
782 awareness of the SMTP input buffering.
784 PP/04 Add commandline_checks_require_admin option.
785 Exim drops privileges sanely, various checks such as -be aren't a
786 security problem, as long as you trust local users with access to their
787 own account. When invoked by services which pass untrusted data to
788 Exim, this might be an issue. Set this option in main configuration
789 AND make fixes to the calling application, such as using `--` to stop
792 JH/13 Do pipelining under TLS. Previously, although safe, no advantage was
793 taken. Now take care to pack both (client) MAIL,RCPT,DATA, and (server)
794 responses to those, into a single TLS record each way (this usually means
795 a single packet). As a side issue, smtp_enforce_sync now works on TLS
798 PP/05 OpenSSL/1.1: use DH_bits() for more accurate DH param sizes. This
799 affects you only if you're dancing at the edge of the param size limits.
800 If you are, and this message makes sense to you, then: raise the
801 configured limit or use OpenSSL 1.1. Nothing we can do for older
804 JH/14 For the "sock" variant of the malware scanner interface, accept an empty
805 cmdline element to get the documented default one. Previously it was
808 JH/15 Fix a crash in the smtp transport caused when two hosts in succession
809 are unsuable for non-message-specific reasons - eg. connection timeout,
810 banner-time rejection.
812 JH/16 Fix logging of delivery remote port, when specified by router, under
815 PP/06 Repair manualroute's ability to take options in any order, even if one
816 is the name of a transport.
819 HS/01 Cleanup, prevent repeated use of -p/-oMr (CVE-2017-1000369)
821 JH/17 Change the list-building routines interface to use the expanding-string
822 triplet model, for better allocation and copying behaviour.
824 JH/18 Prebuild the data-structure for "builtin" macros, for faster startup.
825 Previously it was constructed the first time a possibly-matching string
826 was met in the configuration file input during startup; now it is done
829 JH/19 Bug 2141: Use the full-complex API for Berkeley DB rather than the legacy-
830 compatible one, to avoid the (poorly documented) possibility of a config
831 file in the working directory redirecting the DB files, possibly correpting
832 some existing file. CVE-2017-10140 assigned for BDB.
834 JH/20 Bug 2147: Do not defer for a verify-with-callout-and-random which is not
835 cache-hot. Previously, although the result was properly cached, the
836 initial verify call returned a defer.
838 JH/21 Bug 2151: Avoid using SIZE on the MAIL for a callout verify, on any but
839 the main verify for receipient in uncached-mode.
841 JH/22 Retire historical build files to an "unsupported" subdir. These are
842 defined as "ones for which we have no current evidence of testing".
844 JH/23 DKIM: enforce the DNS pubkey record "h" permitted-hashes optional field,
845 if present. Previously it was ignored.
847 JH/24 Start using specified-initialisers in C structure init coding. This is
848 a C99 feature (it's 2017, so now considered safe).
850 JH/25 Use one-bit bitfields for flags in the "addr" data structure. Previously
851 if was a fixed-sized field and bitmask ops via macros; it is now more
854 PP/07 GitHub PR 56: Apply MariaDB build fix.
855 Patch provided by Jaroslav Škarvada.
857 PP/08 Bug 2161: Fix regression in sieve quoted-printable handling introduced
858 during Coverity cleanups [4.87 JH/47]
859 Diagnosis and fix provided by Michael Fischer v. Mollard.
861 JH/26 Fix DKIM bug: when the pseudoheader generated for signing was exactly
862 the right size to place the terminating semicolon on its own folded
863 line, the header hash was calculated to an incorrect value thanks to
864 the (relaxed) space the fold became.
866 HS/02 Fix Bug 2130: large writes from the transport subprocess were chunked
867 and confused the parent.
869 JH/27 Fix SOCKS bug: an unitialized pointer was deref'd by the transport process
870 which could crash as a result. This could lead to undeliverable messages.
872 JH/28 Logging: "next input sent too soon" now shows where input was truncated
875 JH/29 Fix queue_run_in_order to ignore the PID portion of the message ID. This
876 matters on fast-turnover and PID-randomising systems, which were getting
877 out-of-order delivery.
879 JH/30 Fix a logging bug on aarch64: an unsafe routine was previously used for
880 a possibly-overlapping copy. The symptom was that "Remote host closed
881 connection in response to HELO" was logged instead of the actual 4xx
884 JH/31 Fix CHUNKING code to properly flush the unwanted chunk after an error.
885 Previously only that bufferd was discarded, resulting in SYMTP command
888 JH/32 DKIM: when a message has multiple signatures matching an identity given
889 in dkim_verify_signers, run the dkim acl once for each. Previously only
890 one run was done. Bug 2189.
892 JH/33 Downgrade an unfound-list name (usually a typo in the config file) from
893 "panic the current process" to "deliberately defer". The panic log is
894 still written with the problem list name; the mail and reject logs now
895 get a temp-reject line for the message that was being handled, saying
896 something like "domains check lookup or other defer". The SMTP 451
897 message is still "Temporary local problem".
899 JH/34 Bug 2199: Fix a use-after-free while reading smtp input for header lines.
900 A crafted sequence of BDAT commands could result in in-use memory beeing
901 freed. CVE-2017-16943.
903 HS/03 Bug 2201: Fix checking for leading-dot on a line during headers reading
904 from SMTP input. Previously it was always done; now only done for DATA
905 and not BDAT commands. CVE-2017-16944.
907 JH/35 Bug 2201: Flush received data in BDAT mode after detecting an error fatal
908 to the message (such as an overlong header line). Previously this was
909 not done and we did not exit BDAT mode. Followon from the previous item
910 though a different problem.
916 JH/01 Bug 1922: Support IDNA2008. This has slightly different conversion rules
917 than -2003 did; needs libidn2 in addition to libidn.
919 JH/02 The path option on a pipe transport is now expanded before use.
921 PP/01 GitHub PR 50: Do not call ldap_start_tls_s on ldapi:// connections.
922 Patch provided by "Björn", documentation fix added too.
924 JH/03 Bug 2003: fix Proxy Protocol v2 handling: the address size field was
925 missing a wire-to-host endian conversion.
927 JH/04 Bug 2004: fix CHUNKING in non-PIPELINEING mode. Chunk data following
928 close after a BDAT command line could be taken as a following command,
929 giving a synch failure. Fix by only checking for synch immediately
930 before acknowledging the chunk.
932 PP/02 GitHub PR 52: many spelling fixes, which include fixing parsing of
933 no_require_dnssec option and creation of _HAVE_TRANSPORT_APPEND_MAILDIR
934 macro. Patches provided by Josh Soref.
936 JH/05 Have the EHLO response advertise VRFY, if there is a vrfy ACL defined.
937 Previously we did not; the RFC seems ambiguous and VRFY is not listed
938 by IANA as a service extension. However, John Klensin suggests that we
941 JH/06 Bug 2017: Fix DKIM verification in -bh test mode. The data feed into
942 the dkim code may be unix-mode line endings rather than smtp wire-format
943 CRLF, so prepend a CR to any bare LF.
945 JH/07 Rationalise the coding for callout smtp conversations and transport ones.
946 As a side-benfit, callouts can now use PIPELINING hence fewer round-trips.
948 JH/08 Bug 2016: Fix DKIM verification vs. CHUNKING. Any BDAT commands after
949 the first were themselves being wrongly included in the feed into dkim
950 processing; with most chunk sizes in use this resulted in an incorrect
951 body hash calculated value.
953 JH/09 Bug 2014: permit inclusion of a DKIM-Signature header in a received
954 DKIM signature block, for verification. Although advised against by
955 standards it is specifically not ruled illegal.
957 JH/10 Bug 2025: Fix reception of (quoted) local-parts with embedded spaces.
959 JH/11 Bug 2029: Fix crash in DKIM verification when a message signature block is
960 missing a body hash (the bh= tag).
962 JH/12 Bug 2018: Re-order Proxy Protocol startup versus TLS-on-connect startup.
963 It seems that HAProxy sends the Proxy Protocol information in clear and
964 only then does a TLS startup, so do the same.
966 JH/13 Bug 2027: Avoid attempting to use TCP Fast Open for non-transport client
967 TCP connections (such as for Spamd) unless the daemon successfully set
968 Fast Open mode on its listening sockets. This fixes breakage seen on
969 too-old kernels or those not configured for Fast Open, at the cost of
970 requiring both directions being enabled for TFO, and TFO never being used
971 by non-daemon-related Exim processes.
973 JH/14 Bug 2000: Reject messages recieved with CHUNKING but with malformed line
974 endings, at least on the first header line. Try to canonify any that get
975 past that check, despite the cost.
977 JH/15 Angle-bracket nesting (an error inserted by broken sendmails) levels are
978 now limited to an arbitrary five deep, while parsing addresses with the
979 strip_excess_angle_brackets option enabled.
981 PP/03 Bug 2018: For Proxy Protocol and TLS-on-connect, do not over-read and
982 instead leave the unprompted TLS handshake in socket buffer for the
983 TLS library to consume.
985 PP/04 Bug 2018: Also handle Proxy Protocol v2 safely.
987 PP/05 FreeBSD compat: handle that Ports no longer create /usr/bin/perl
989 JH/16 Drop variables when they go out of scope. Memory management drops a whole
990 region in one operation, for speed, and this leaves assigned pointers
991 dangling. Add checks run only under the testsuite which checks all
992 variables at a store-reset and panics on a dangling pointer; add code
993 explicitly nulling out all the variables discovered. Fixes one known
994 bug: a transport crash, where a dangling pointer for $sending_ip_address
995 originally assigned in a verify callout, is re-used.
997 PP/06 Drop '.' from @INC in various Perl scripts.
999 PP/07 Switch FreeBSD iconv to always use the base-system libc functions.
1001 PP/08 Reduce a number of compilation warnings under clang; building with
1002 CC=clang CFLAGS+=-Wno-dangling-else -Wno-logical-op-parentheses
1003 should be warning-free.
1005 JH/17 Fix inbound CHUNKING when DKIM disabled at runtime.
1007 HS/01 Fix portability problems introduced by PP/08 for platforms where
1008 realloc(NULL) is not equivalent to malloc() [SunOS et al].
1010 HS/02 Bug 1974: Fix missing line terminator on the last received BDAT
1011 chunk. This allows us to accept broken chunked messages. We need a more
1012 general solution here.
1014 PP/09 Wrote util/chunking_fixqueue_finalnewlines.pl to help recover
1015 already-broken messages in the queue.
1017 JH/18 Bug 2061: Fix ${extract } corrupting an enclosing ${reduce } $value.
1019 JH/19 Fix reference counting bug in routing-generated-address tracking.
1025 JH/01 Use SIZE on MAIL FROM in a cutthrough connection, if the destination
1026 supports it and a size is available (ie. the sending peer gave us one).
1028 JH/02 The obsolete acl condition "demime" is removed (finally, after ten
1029 years of being deprecated). The replacements are the ACLs
1030 acl_smtp_mime and acl_not_smtp_mime.
1032 JH/03 Upgrade security requirements imposed for hosts_try_dane: previously
1033 a downgraded non-dane trust-anchor for the TLS connection (CA-style)
1034 or even an in-clear connection were permitted. Now, if the host lookup
1035 was dnssec and dane was requested then the host is only used if the
1036 TLSA lookup succeeds and is dnssec. Further hosts (eg. lower priority
1037 MXs) will be tried (for hosts_try_dane though not for hosts_require_dane)
1038 if one fails this test.
1039 This means that a poorly-configured remote DNS will make it incommunicado;
1040 but it protects against a DNS-interception attack on it.
1042 JH/04 Bug 1810: make continued-use of an open smtp transport connection
1043 non-noisy when a race steals the message being considered.
1045 JH/05 If main configuration option tls_certificate is unset, generate a
1046 self-signed certificate for inbound TLS connections.
1048 JH/06 Bug 165: hide more cases of password exposure - this time in expansions
1049 in rewrites and routers.
1051 JH/07 Retire gnutls_require_mac et.al. These were nonfunctional since 4.80
1052 and logged a warning sing 4.83; now they are a configuration file error.
1054 JH/08 Bug 1836: Fix crash in VRFY handling when handed an unqualified name
1055 (lacking @domain). Apply the same qualification processing as RCPT.
1057 JH/09 Bug 1804: Avoid writing msglog files when in -bh or -bhc mode.
1059 JH/10 Support ${sha256:} applied to a string (as well as the previous
1062 JH/11 Cutthrough: avoid using the callout hints db on a verify callout when
1063 a cutthrough deliver is pending, as we always want to make a connection.
1064 This also avoids re-routing the message when later placing the cutthrough
1065 connection after a verify cache hit.
1066 Do not update it with the verify result either.
1068 JH/12 Cutthrough: disable when verify option success_on_redirect is used, and
1069 when routing results in more than one destination address.
1071 JH/13 Cutthrough: expand transport dkim_domain option when testing for dkim
1072 signing (which inhibits the cutthrough capability). Previously only
1073 the presence of an option was tested; now an expansion evaluating as
1074 empty is permissible (obviously it should depend only on data available
1075 when the cutthrough connection is made).
1077 JH/14 Fix logging of errors under PIPELINING. Previously the log line giving
1078 the relevant preceding SMTP command did not note the pipelining mode.
1080 JH/15 Fix counting of empty lines in $body_linecount and $message_linecount.
1081 Previously they were not counted.
1083 JH/16 DANE: treat a TLSA lookup response having all non-TLSA RRs, the same
1084 as one having no matching records. Previously we deferred the message
1085 that needed the lookup.
1087 JH/17 Fakereject: previously logged as a normal message arrival "<="; now
1088 distinguished as "(=".
1090 JH/18 Bug 1867: make the fail_defer_domains option on a dnslookup router work
1091 for missing MX records. Previously it only worked for missing A records.
1093 JH/19 Bug 1850: support Radius libraries that return REJECT_RC.
1095 JH/20 Bug 1872: Ensure that acl_smtp_notquit is run when the connection drops
1096 after the data-go-ahead and data-ack. Patch from Jason Betts.
1098 JH/21 Bug 1846: Send DMARC forensic reports for reject and quarantine results,
1099 even for a "none" policy. Patch from Tony Meyer.
1101 JH/22 Fix continued use of a connection for further deliveries. If a port was
1102 specified by a router, it must also match for the delivery to be
1105 JH/23 Bug 1874: fix continued use of a connection for further deliveries.
1106 When one of the recipients of a message was unsuitable for the connection
1107 (has no matching addresses), we lost track of needing to mark it
1108 deferred. As a result mail would be lost.
1110 JH/24 Bug 1832: Log EHLO response on getting conn-close response for HELO.
1112 JH/25 Decoding ACL controls is now done using a binary search; the source code
1113 takes up less space and should be simpler to maintain. Merge the ACL
1114 condition decode tables also, with similar effect.
1116 JH/26 Fix problem with one_time used on a redirect router which returned the
1117 parent address unchanged. A retry would see the parent address marked as
1118 delivered, so not attempt the (identical) child. As a result mail would
1121 JH/27 Fix a possible security hole, wherein a process operating with the Exim
1122 UID can gain a root shell. Credit to http://www.halfdog.net/ for
1123 discovery and writeup. Ubuntu bug 1580454; no bug raised against Exim
1126 JH/28 Enable {spool,log} filesystem space and inode checks as default.
1127 Main config options check_{log,spool}_{inodes,space} are now
1128 100 inodes, 10MB unless set otherwise in the configuration.
1130 JH/29 Fix the connection_reject log selector to apply to the connect ACL.
1131 Previously it only applied to the main-section connection policy
1134 JH/30 Bug 1897: fix callouts connection fallback from TLS to cleartext.
1136 PP/01 Changed default Diffie-Hellman parameters to be Exim-specific, created
1137 by me. Added RFC7919 DH primes as an alternative.
1139 PP/02 Unbreak build via pkg-config with new hash support when crypto headers
1140 are not in the system include path.
1142 JH/31 Fix longstanding bug with aborted TLS server connection handling. Under
1143 GnuTLS, when a session startup failed (eg because the client disconnected)
1144 Exim did stdio operations after fclose. This was exposed by a recent
1145 change which nulled out the file handle after the fclose.
1147 JH/32 Bug 1909: Fix OCSP proof verification for cases where the proof is
1148 signed directly by the cert-signing cert, rather than an intermediate
1149 OCSP-signing cert. This is the model used by LetsEncrypt.
1151 JH/33 Bug 1914: Ensure socket is nonblocking before draining after SMTP QUIT.
1153 HS/01 Fix leak in verify callout under GnuTLS, about 3MB per recipient on
1154 an incoming connection.
1156 HS/02 Bug 1802: Do not half-close the connection after sending a request
1159 HS/03 Use "auto" as the default EC curve parameter. For OpenSSL < 1.0.2
1160 fallback to "prime256v1".
1162 JH/34 SECURITY: Use proper copy of DATA command in error message.
1163 Could leak key material. Remotely exploitable. CVE-2016-9963.
1169 JH/01 Bug 1664: Disable OCSP for GnuTLS library versions at/before 3.3.16
1170 and 3.4.4 - once the server is enabled to respond to an OCSP request
1171 it does even when not requested, resulting in a stapling non-aware
1172 client dropping the TLS connection.
1174 TF/01 Code cleanup: Overhaul the debug_selector and log_selector machinery to
1175 support variable-length bit vectors. No functional change.
1177 TF/02 Improve the consistency of logging incoming and outgoing interfaces.
1178 The I= interface field on outgoing lines is now after the H= remote
1179 host field, same as incoming lines. There is a separate
1180 outgoing_interface log selector which allows you to disable the
1183 JH/02 Bug 728: Close logfiles after a daemon-process "exceptional" log write.
1184 If not running log_selector +smtp_connection the mainlog would be held
1185 open indefinitely after a "too many connections" event, including to a
1186 deleted file after a log rotate. Leave the per net connection logging
1187 leaving it open for efficiency as that will be quickly detected by the
1188 check on the next write.
1190 HS/01 Bug 1671: Fix post transport crash.
1191 Processing the wait-<transport> messages could crash the delivery
1192 process if the message IDs didn't exist for some reason. When
1193 using 'split_spool_directory=yes' the construction of the spool
1194 file name failed already, exposing the same netto behaviour.
1196 JH/03 Bug 425: Capture substrings in $regex1, $regex2 etc from regex &
1197 mime_regex ACL conditions.
1199 JH/04 Bug 1686: When compiled with EXPERIMENTAL_DSN_INFO: Add extra information
1200 to DSN fail messages (bounces): remote IP, remote greeting, remote response
1201 to HELO, local diagnostic string.
1203 JH/05 Downgrade message for a TLS-certificate-based authentication fail from
1204 log line to debug. Even when configured with a tls authenticator many
1205 client connections are expected to not authenticate in this way, so
1206 an authenticate fail is not an error.
1208 HS/02 Add the Exim version string to the process info. This way exiwhat
1209 gives some more detail about the running daemon.
1211 JH/06 Bug 1395: time-limit caching of DNS lookups, to the TTL value. This may
1212 matter for fast-change records such as DNSBLs.
1214 JH/07 Bug 1678: Always record an interface option value, if set, as part of a
1215 retry record, even if constant. There may be multiple transports with
1216 different interface settings and the retry behaviour needs to be kept
1219 JH/08 Bug 1586: exiqgrep now refuses to run if there are unexpected arguments.
1221 JH/09 Bug 1700: ignore space & tab embedded in base64 during decode.
1223 JH/10 Bug 840: fix log_defer_output option of pipe transport
1225 JH/11 Bug 830: use same host for all RCPTS of a message, even under
1226 hosts_randomize. This matters a lot when combined with mua_wrapper.
1228 JH/12 Bug 1706: percent and underbar characters are no longer escaped by the
1229 ${quote_pgsql:<string>} operator.
1231 JH/13 Bug 1708: avoid misaligned access in cached lookup.
1233 JH/14 Change header file name for freeradius-client. Relevant if compiling
1234 with Radius support; from the Gentoo tree and checked under Fedora.
1236 JH/15 Bug 1712: Introduce $prdr_requested flag variable
1238 JH/16 Bug 1714: Permit an empty string as expansion result for transport
1239 option transport_filter, meaning no filtering.
1241 JH/17 Bug 1713: Fix non-PDKIM_DEBUG build. Patch from Jasen Betts.
1243 JH/18 Bug 1709: When built with TLS support, the tls_advertise_hosts option now
1244 defaults to "*" (all hosts). The variable is now available when not built
1245 with TLS, default unset, mainly to enable keeping the testsuite sane.
1246 If a server certificate is not supplied (via tls_certificate) an error is
1247 logged, and clients will find TLS connections fail on startup. Presumably
1248 they will retry in-clear.
1249 Packagers of Exim are strongly encouraged to create a server certificate
1250 at installation time.
1252 HS/03 Add -bP config_file as a synonym for -bP configure_file, for consistency
1253 with the $config_file variable.
1255 JH/19 Two additional event types: msg:rcpt:defer and msg:rcpt:host:defer. Both
1256 in transport context, after the attempt, and per-recipient. The latter type
1257 is per host attempted. The event data is the error message, and the errno
1258 information encodes the lookup type (A vs. MX) used for the (first) host,
1259 and the trailing two digits of the smtp 4xx response.
1261 GF/01 Bug 1715: Fix for race condition in exicyclog, where exim could attempt
1262 to write to mainlog (or rejectlog, paniclog) in the window between file
1263 creation and permissions/ownership being changed. Particularly affects
1264 installations where exicyclog is run as root, rather than exim user;
1265 result is that the running daemon panics and dies.
1267 JH/20 Bug 1701: For MySQL lookups, support MySQL config file option group names.
1269 JH/21 Bug 1720: Add support for priority groups and weighted-random proxy
1270 selection for the EXPERIMENTAL_SOCKS feature, via new per-proxy options
1271 "pri" and "weight". Note that the previous implicit priority given by the
1272 list order is no longer honoured.
1274 JH/22 Bugs 963, 1721: Fix some corner cases in message body canonicalization
1275 for DKIM processing.
1277 JH/23 Move SOCKS5 support from Experimental to mainline, enabled for a build
1278 by defining SUPPORT_SOCKS.
1280 JH/26 Move PROXY support from Experimental to mainline, enabled for a build
1281 by defining SUPPORT_PROXY. Note that the proxy_required_hosts option
1282 is renamed to hosts_proxy, and the proxy_{host,target}_{address,port}.
1283 variables are renamed to proxy_{local,external}_{address,port}.
1285 JH/27 Move Internationalisation support from Experimental to mainline, enabled
1286 for a build by defining SUPPORT_I18N
1288 JH/28 Bug 1745: Fix redis lookups to handle (quoted) spaces embedded in parts
1289 of the query string, and make ${quote_redis:} do that quoting.
1291 JH/29 Move Events support from Experimental to mainline, enabled by default
1292 and removable for a build by defining DISABLE_EVENT.
1294 JH/30 Updated DANE implementation code to current from Viktor Dukhovni.
1296 JH/31 Fix bug with hosts_connection_nolog and named-lists which were wrongly
1297 cached by the daemon.
1299 JH/32 Move Redis support from Experimental to mainline, enabled for a build
1300 by defining LOOKUP_REDIS. The libhiredis library is required.
1302 JH/33 Bug 1748: Permit ACL dnslists= condition in non-smtp ACLs if explicit
1303 keys are given for lookup.
1305 JH/34 Bug 1192: replace the embedded copy of PolarSSL RSA routines in the DKIM
1306 support, by using OpenSSL or GnuTLS library ones. This means DKIM is
1307 only supported when built with TLS support. The PolarSSL SHA routines
1308 are still used when the TLS library is too old for convenient support.
1310 JH/35 Require SINGLE_DH_USE by default in OpenSSL (main config option
1311 openssl_options), for security. OpenSSL forces this from version 1.1.0
1312 server-side so match that on older versions.
1314 JH/36 Bug 1778: longstanding bug in memory use by the ${run } expansion: A fresh
1315 allocation for $value could be released as the expansion processing
1316 concluded, but leaving the global pointer active for it.
1318 JH/37 Bug 1769: Permit a VRFY ACL to override the default 252 response,
1319 and to use the domains and local_parts ACL conditions.
1321 JH/38 Fix cutthrough bug with body lines having a single dot. The dot was
1322 incorrectly not doubled on cutthrough transmission, hence seen as a
1323 body-termination at the receiving system - resulting in truncated mails.
1324 Commonly the sender saw a TCP-level error, and retransmitted the message
1325 via the normal store-and-forward channel. This could result in duplicates
1326 received - but deduplicating mailstores were liable to retain only the
1327 initial truncated version.
1329 JH/39 Bug 1781: Fix use of DKIM private-keys having trailing '=' in the base-64.
1331 JH/40 Fix crash in queryprogram router when compiled with EXPERIMENTAL_SRS.
1333 JH/41 Bug 1792: Fix selection of headers to sign for DKIM: bottom-up. While
1334 we're in there, support oversigning also; bug 1309.
1336 JH/42 Bug 1796: Fix error logged on a malware scanner connection failure.
1338 HS/04 Add support for keep_environment and add_environment options.
1340 JH/43 Tidy coding issues detected by gcc --fsanitize=undefined. Some remain;
1341 either intentional arithmetic overflow during PRNG, or testing config-
1344 JH/44 Bug 1800: The combination of a -bhc commandline option and cutthrough
1345 delivery resulted in actual delivery. Cancel cutthrough before DATA
1348 JH/45 Fix cutthrough, when connection not opened by verify and target hard-
1349 rejects a recipient: pass the reject to the originator.
1351 JH/46 Multiple issues raised by Coverity. Some were obvious or plausible bugs.
1352 Many were false-positives and ignorable, but it's worth fixing the
1355 JH/47 Fix build on HP-UX and older Solaris, which need (un)setenv now also
1356 for the new environment-manipulation done at startup. Move the routines
1357 from being local to tls.c to being global via the os.c file.
1359 JH/48 Bug 1807: Fix ${extract } for the numeric/3-string case. While preparsing
1360 an extract embedded as result-arg for a map, the first arg for extract
1361 is unavailable so we cannot tell if this is a numbered or keyed
1362 extraction. Accept either.
1368 JH/01 Bug 1545: The smtp transport option "retry_include_ip_address" is now
1371 JH/02 The smtp transport option "multi_domain" is now expanded.
1373 JH/03 The smtp transport now requests PRDR by default, if the server offers
1376 JH/04 Certificate name checking on server certificates, when exim is a client,
1377 is now done by default. The transport option tls_verify_cert_hostnames
1378 can be used to disable this per-host. The build option
1379 EXPERIMENTAL_CERTNAMES is withdrawn.
1381 JH/05 The value of the tls_verify_certificates smtp transport and main options
1382 default to the word "system" to access the system default CA bundle.
1383 For GnuTLS, only version 3.0.20 or later.
1385 JH/06 Verification of the server certificate for a TLS connection is now tried
1386 (but not required) by default. The verification status is now logged by
1387 default, for both outbound TLS and client-certificate supplying inbound
1390 JH/07 Changed the default rfc1413 lookup settings to disable calls. Few
1393 JH/08 The EXPERIMENTAL_DSN compile option is no longer needed; all Delivery
1394 Status Notification (bounce) messages are now MIME format per RFC 3464.
1395 Support for RFC 3461 DSN options NOTIFY,ENVID,RET,ORCPT can be advertised
1396 under the control of the dsn_advertise_hosts option, and routers may
1397 have a dsn_lasthop option.
1399 JH/09 A timeout of 2 minutes is now applied to all malware scanner types by
1400 default, modifiable by a malware= option. The list separator for
1401 the options can now be changed in the usual way. Bug 68.
1403 JH/10 The smtp_receive_timeout main option is now expanded before use.
1405 JH/11 The incoming_interface log option now also enables logging of the
1406 local interface on delivery outgoing connections.
1408 JH/12 The cutthrough-routing facility now supports multi-recipient mails,
1409 if the interface and destination host and port all match.
1411 JH/13 Bug 344: The verify = reverse_host_lookup ACL condition now accepts a
1414 JH/14 Bug 1573: The spam= ACL condition now additionally supports Rspamd.
1415 Patch from Andrew Lewis.
1417 JH/15 Bug 670: The spamd_address main option (for the spam= ACL condition)
1418 now supports optional time-restrictions, weighting, and priority
1419 modifiers per server. Patch originally by <rommer@active.by>.
1421 JH/16 The spamd_address main option now supports a mixed list of local
1422 and remote servers. Remote servers can be IPv6 addresses, and
1423 specify a port-range.
1425 JH/17 Bug 68: The spamd_address main option now supports an optional
1426 timeout value per server.
1428 JH/18 Bug 1581: Router and transport options headers_add/remove can
1429 now have the list separator specified.
1431 JH/19 Bug 392: spamd_address, and clamd av_scanner, now support retry
1434 JH/20 Bug 1571: Ensure that $tls_in_peerdn is set, when verification fails
1437 JH/21 Support for the A6 type of dns record is withdrawn.
1439 JH/22 Bug 608: The result of a QUIT or not-QUIT toplevel ACL now matters
1440 rather than the verbs used.
1442 JH/23 Bug 1572: Increase limit on SMTP confirmation message copy size
1443 from 255 to 1024 chars.
1445 JH/24 Verification callouts now attempt to use TLS by default.
1447 HS/01 DNSSEC options (dnssec_require_domains, dnssec_request_domains)
1448 are generic router options now. The defaults didn't change.
1450 JH/25 Bug 466: Add RFC2322 support for MIME attachment filenames.
1451 Original patch from Alexander Shikoff, worked over by JH.
1453 HS/02 Bug 1575: exigrep falls back to autodetection of compressed
1454 files if ZCAT_COMMAND is not executable.
1456 JH/26 Bug 1539: Add timeout/retry options on dnsdb lookups.
1458 JH/27 Bug 286: Support SOA lookup in dnsdb lookups.
1460 JH/28 Bug 1588: Do not use the A lookup following an AAAA for setting the FQDN.
1461 Normally benign, it bites when the pair was led to by a CNAME;
1462 modern usage is to not canonicalize the domain to a CNAME target
1463 (and we were inconsistent anyway for A-only vs AAAA+A).
1465 JH/29 Bug 1632: Removed the word "rejected" from line logged for ACL discards.
1467 JH/30 Check the forward DNS lookup for DNSSEC, in addition to the reverse,
1468 when evaluating $sender_host_dnssec.
1470 JH/31 Check the HELO verification lookup for DNSSEC, adding new
1471 $sender_helo_dnssec variable.
1473 JH/32 Bug 1397: Enable ECDHE on OpenSSL, just the NIST P-256 curve.
1475 JH/33 Bug 1346: Note MAIL cmd seen in -bS batch, to avoid smtp_no_mail log.
1477 JH/34 Bug 1648: Fix a memory leak seen with "mailq" and large queues.
1479 JH/35 Bug 1642: Fix support of $spam_ variables at delivery time. Was
1480 documented as working, but never had. Support all but $spam_report.
1482 JH/36 Bug 1659: Guard checking of input smtp commands again pseudo-command
1483 added for tls authenticator.
1485 HS/03 Add perl_taintmode main config option
1491 TL/01 When running the test suite, the README says that variables such as
1492 no_msglog_check are global and can be placed anywhere in a specific
1493 test's script, however it was observed that placement needed to be near
1494 the beginning for it to behave that way. Changed the runtest perl
1495 script to read through the entire script once to detect and set these
1496 variables, reset to the beginning of the script, and then run through
1497 the script parsing/test process like normal.
1499 TL/02 The BSD's have an arc4random API. One of the functions to induce
1500 adding randomness was arc4random_stir(), but it has been removed in
1501 OpenBSD 5.5. Detect this OpenBSD version and skip calling this
1502 function when detected.
1504 JH/01 Expand the EXPERIMENTAL_TPDA feature. Several different events now
1505 cause callback expansion.
1507 TL/03 Bugzilla 1518: Clarify "condition" processing in routers; that
1508 syntax errors in an expansion can be treated as a string instead of
1509 logging or causing an error, due to the internal use of bool_lax
1510 instead of bool when processing it.
1512 JH/02 Add EXPERIMENTAL_DANE, allowing for using the DNS as trust-anchor for
1513 server certificates when making smtp deliveries.
1515 JH/03 Support secondary-separator specifier for MX, SRV, TLSA lookups.
1517 JH/04 Add ${sort {list}{condition}{extractor}} expansion item.
1519 TL/04 Bugzilla 1216: Add -M (related messages) option to exigrep.
1521 TL/05 GitHub Issue 18: Adjust logic testing for true/false in redis lookups.
1522 Merged patch from Sebastian Wiedenroth.
1524 JH/05 Fix results-pipe from transport process. Several recipients, combined
1525 with certificate use, exposed issues where response data items split
1526 over buffer boundaries were not parsed properly. This eventually
1527 resulted in duplicates being sent. This issue only became common enough
1528 to notice due to the introduction of connection certificate information,
1529 the item size being so much larger. Found and fixed by Wolfgang Breyha.
1531 JH/06 Bug 1533: Fix truncation of items in headers_remove lists. A fixed
1532 size buffer was used, resulting in syntax errors when an expansion
1535 JH/07 Add support for directories of certificates when compiled with a GnuTLS
1536 version 3.3.6 or later.
1538 JH/08 Rename the TPDA experimental facility to Event Actions. The #ifdef
1539 is EXPERIMENTAL_EVENT, the main-configuration and transport options
1540 both become "event_action", the variables become $event_name, $event_data
1541 and $event_defer_errno. There is a new variable $verify_mode, usable in
1542 routers, transports and related events. The tls:cert event is now also
1543 raised for inbound connections, if the main configuration event_action
1546 TL/06 In test suite, disable OCSP for old versions of openssl which contained
1547 early OCSP support, but no stapling (appears to be less than 1.0.0).
1549 JH/09 When compiled with OpenSSL and EXPERIMENTAL_CERTNAMES, the checks on
1550 server certificate names available under the smtp transport option
1551 "tls_verify_cert_hostname" now do not permit multi-component wildcard
1554 JH/10 Time-related extraction expansions from certificates now use the main
1555 option "timezone" setting for output formatting, and are consistent
1556 between OpenSSL and GnuTLS compilations. Bug 1541.
1558 JH/11 Fix a crash in mime ACL when meeting a zero-length, quoted or RFC2047-
1559 encoded parameter in the incoming message. Bug 1558.
1561 JH/12 Bug 1527: Autogrow buffer used in reading spool files. Since they now
1562 include certificate info, eximon was claiming there were spoolfile
1565 JH/13 Bug 1521: Fix ldap lookup for single-attr request, multiple-attr return.
1567 JH/14 Log delivery-related information more consistently, using the sequence
1568 "H=<name> [<ip>]" wherever possible.
1570 TL/07 Bug 1547: Omit RFCs from release. Draft and RFCs have licenses which
1571 are problematic for Debian distribution, omit them from the release
1574 JH/15 Updates and fixes to the EXPERIMENTAL_DSN feature.
1576 JH/16 Fix string representation of time values on 64bit time_t architectures.
1579 JH/17 Fix a null-indirection in certextract expansions when a nondefault
1580 output list separator was used.
1585 TL/01 Bugzilla 1506: Re-add a 'return NULL' to silence complaints from static
1586 checkers that were complaining about end of non-void function with no
1589 JH/01 Bug 1513: Fix parsing of quoted parameter values in MIME headers.
1590 This was a regression introduced in 4.83 by another bugfix.
1592 JH/02 Fix broken compilation when EXPERIMENTAL_DSN is enabled.
1594 TL/02 Bug 1509: Fix exipick for enhanced spoolfile specification used when
1595 EXPERIMENTAL_DSN is enabled. Fix from Wolfgang Breyha.
1601 TF/01 Correctly close the server side of TLS when forking for delivery.
1603 When a message was received over SMTP with TLS, Exim failed to clear up
1604 the incoming connection properly after forking off the child process to
1605 deliver the message. In some situations the subsequent outgoing
1606 delivery connection happened to have the same fd number as the incoming
1607 connection previously had. Exim would try to use TLS and fail, logging
1608 a "Bad file descriptor" error.
1610 TF/02 Portability fix for building lookup modules on Solaris when the xpg4
1611 utilities have not been installed.
1613 JH/01 Fix memory-handling in use of acl as a conditional; avoid free of
1614 temporary space as the ACL may create new global variables.
1616 TL/01 LDAP support uses per connection or global context settings, depending
1617 upon the detected version of the libraries at build time.
1619 TL/02 Experimental Proxy Protocol support: allows a proxied SMTP connection
1620 to extract and use the src ip:port in logging and expansions as if it
1621 were a direct connection from the outside internet. PPv2 support was
1622 updated based on HAProxy spec change in May 2014.
1624 JH/02 Add ${listextract {number}{list}{success}{fail}}.
1626 TL/03 Bugzilla 1433: Fix DMARC SEGV with specific From header contents.
1627 Properly escape header and check for NULL return.
1629 PP/01 Continue incomplete 4.82 PP/19 by fixing docs too: use dns_dnssec_ok
1632 JH/03 Bugzilla 1157: support log_selector smtp_confirmation for lmtp.
1634 TL/04 Add verify = header_names_ascii check to reject email with non-ASCII
1635 characters in header names, implemented as a verify condition.
1636 Contributed by Michael Fischer v. Mollard.
1638 TL/05 Rename SPF condition results err_perm and err_temp to standardized
1639 results permerror and temperror. Previous values are deprecated but
1640 still accepted. In a future release, err_perm and err_temp will be
1641 completely removed, which will be a backward incompatibility if the
1642 ACL tests for either of these two old results. Patch contributed by
1643 user bes-internal on the mailing list.
1645 JH/04 Add ${utf8clean:} operator. Contributed by Alex Rau.
1647 JH/05 Bugzilla 305: Log incoming-TLS details on rejects, subject to log
1648 selectors, in both main and reject logs.
1650 JH/06 Log outbound-TLS and port details, subject to log selectors, for a
1653 JH/07 Add malware type "sock" for talking to simple daemon.
1655 JH/08 Bugzilla 1371: Add tls_{,try_}verify_hosts to smtp transport.
1657 JH/09 Bugzilla 1431: Support (with limitations) headers_add/headers_remove in
1658 routers/transports under cutthrough routing.
1660 JH/10 Bugzilla 1005: ACL "condition =" should accept values which are negative
1661 numbers. Touch up "bool" conditional to keep the same definition.
1663 TL/06 Remove duplicated language in spec file from 4.82 TL/16.
1665 JH/11 Add dnsdb tlsa lookup. From Todd Lyons.
1667 JH/12 Expand items in router/transport headers_add or headers_remove lists
1668 individually rather than the list as a whole. Bug 1452.
1670 Required for reasonable handling of multiple headers_ options when
1671 they may be empty; requires that headers_remove items with embedded
1672 colons must have them doubled (or the list-separator changed).
1674 TL/07 Add new dmarc expansion variable $dmarc_domain_policy to directly
1675 view the policy declared in the DMARC record. Currently, $dmarc_status
1676 is a combined value of both the record presence and the result of the
1679 JH/13 Fix handling of $tls_cipher et.al. in (non-verify) transport. Bug 1455.
1681 JH/14 New options dnssec_request_domains, dnssec_require_domains on the
1682 dnslookup router and the smtp transport (applying to the forward
1685 TL/08 Bugzilla 1453: New LDAP "SERVERS=" option allows admin to override list
1686 of ldap servers used for a specific lookup. Patch provided by Heiko
1689 JH/18 New options dnssec_lax, dnssec_strict on dnsdb lookups.
1690 New variable $lookup_dnssec_authenticated for observability.
1692 TL/09 Bugzilla 609: Add -C option to exiqgrep, specify which exim.conf to use.
1693 Patch submitted by Lars Timman.
1695 JH/19 EXPERIMENTAL_OCSP support under GnuTLS. Bug 1459.
1697 TL/10 Bugzilla 1454: New -oMm option to pass message reference to Exim.
1698 Requires trusted mode and valid format message id, aborts otherwise.
1699 Patch contributed by Heiko Schlichting.
1701 JH/20 New expansion variables tls_(in,out)_(our,peer)cert, and expansion item
1702 certextract with support for various fields. Bug 1358.
1704 JH/21 Observability of OCSP via variables tls_(in,out)_ocsp. Stapling
1705 is requested by default, modifiable by smtp transport option
1708 JH/22 Expansion operators ${md5:string} and ${sha1:string} can now
1709 operate on certificate variables to give certificate fingerprints
1710 Also new ${sha256:cert_variable}.
1712 JH/23 The PRDR feature is moved from being Experimental into the mainline.
1714 TL/11 Bug 1119: fix memory allocation in string_printing2(). Patch from
1715 Christian Aistleitner.
1717 JH/24 The OCSP stapling feature is moved from Experimental into the mainline.
1719 TL/12 Bug 1444: Fix improper \r\n sequence handling when writing spool
1720 file. Patch from Wolfgang Breyha.
1722 JH/25 Expand the coverage of the delivery $host and $host_address to
1723 client authenticators run in verify callout. Bug 1476.
1725 JH/26 Port service names are now accepted for tls_on_connect_ports, to
1726 align with daemon_smtp_ports. Bug 72.
1728 TF/03 Fix udpsend. The ip_connectedsocket() function's socket type
1729 support and error reporting did not work properly.
1731 TL/13 Bug 1495: Exiqgrep check if -C config file specified on cli exists
1732 and is readable. Patch from Andrew Colin Kissa.
1734 TL/14 Enhance documentation of ${run expansion and how it parses the
1735 commandline after expansion, particularly in the case when an
1736 unquoted variable expansion results in an empty value.
1738 JH/27 The TLS SNI feature was broken in 4.82. Fix it.
1740 PP/02 Fix internal collision of T_APL on systems which support RFC3123
1741 by renaming away from it. Addresses GH issue 15, reported by
1744 JH/28 Fix parsing of MIME headers for parameters with quoted semicolons.
1746 TL/15 SECURITY: prevent double expansion in math comparison functions
1747 (can expand unsanitized data). Not remotely exploitable.
1754 PP/01 Add -bI: framework, and -bI:sieve for querying sieve capabilities.
1756 PP/02 Make -n do something, by making it not do something.
1757 When combined with -bP, the name of an option is not output.
1759 PP/03 Added tls_dh_min_bits SMTP transport driver option, only honoured
1762 PP/04 First step towards DNSSEC, provide $sender_host_dnssec for
1763 $sender_host_name and config options to manage this, and basic check
1766 PP/05 DSCP support for outbound connections and control modifier for inbound.
1768 PP/06 Cyrus SASL: set local and remote IP;port properties for driver.
1769 (Only plugin which currently uses this is kerberos4, which nobody should
1770 be using, but we should make it available and other future plugins might
1771 conceivably use it, even though it would break NAT; stuff *should* be
1772 using channel bindings instead).
1774 PP/07 Handle "exim -L <tag>" to indicate to use syslog with tag as the process
1775 name; added for Sendmail compatibility; requires admin caller.
1776 Handle -G as equivalent to "control = suppress_local_fixups" (we used to
1777 just ignore it); requires trusted caller.
1778 Also parse but ignore: -Ac -Am -X<logfile>
1781 TL/01 Bugzilla 1258 - Refactor MAIL FROM optional args processing.
1783 TL/02 Add +smtp_confirmation as a default logging option.
1785 TL/03 Bugzilla 198 - Implement remove_header ACL modifier.
1786 Patch by Magnus Holmgren from 2007-02-20.
1788 TL/04 Bugzilla 1281 - Spec typo.
1789 Bugzilla 1283 - Spec typo.
1790 Bugzilla 1290 - Spec grammar fixes.
1792 TL/05 Bugzilla 1285 - Spec omission, fix docbook errors for spec.txt creation.
1794 TL/06 Add Experimental DMARC support using libopendmarc libraries.
1796 TL/07 Fix an out of order global option causing a segfault. Reported to dev
1797 mailing list by by Dmitry Isaikin.
1799 JH/01 Bugzilla 1201 & 304 - New cutthrough-delivery feature, with TLS support.
1801 JH/02 Support "G" suffix to numbers in ${if comparisons.
1803 PP/08 Handle smtp transport tls_sni option forced-fail for OpenSSL.
1805 NM/01 Bugzilla 1197 - Spec typo
1806 Bugzilla 1196 - Spec examples corrections
1808 JH/03 Add expansion operators ${listnamed:name} and ${listcount:string}
1810 PP/09 Add gnutls_allow_auto_pkcs11 option (was originally called
1811 gnutls_enable_pkcs11, but renamed to more accurately indicate its
1814 PP/10 Let Linux makefile inherit CFLAGS/CFLAGS_DYNAMIC.
1815 Pulled from Debian 30_dontoverridecflags.dpatch by Andreas Metzler.
1817 JH/04 Add expansion item ${acl {name}{arg}...}, expansion condition
1818 "acl {{name}{arg}...}", and optional args on acl condition
1821 JH/05 Permit multiple router/transport headers_add/remove lines.
1823 JH/06 Add dnsdb pseudo-lookup "a+" to do an "aaaa" + "a" combination.
1825 JH/07 Avoid using a waiting database for a single-message-only transport.
1826 Performance patch from Paul Fisher. Bugzilla 1262.
1828 JH/08 Strip leading/trailing newlines from add_header ACL modifier data.
1831 JH/09 Add $headers_added variable, with content from use of ACL modifier
1832 add_header (but not yet added to the message). Bugzilla 199.
1834 JH/10 Add 8bitmime log_selector, for 8bitmime status on the received line.
1835 Pulled from Bugzilla 817 by Wolfgang Breyha.
1837 PP/11 SECURITY: protect DKIM DNS decoding from remote exploit.
1839 (nb: this is the same fix as in Exim 4.80.1)
1841 JH/11 Add A= logging on delivery lines, and a client_set_id option on
1844 JH/12 Add optional authenticated_sender logging to A= and a log_selector
1847 PP/12 Unbreak server_set_id for NTLM/SPA auth, broken by 4.80 PP/29.
1849 PP/13 Dovecot auth: log better reason to rejectlog if Dovecot did not
1850 advertise SMTP AUTH mechanism to us, instead of a generic
1851 protocol violation error. Also, make Exim more robust to bad
1852 data from the Dovecot auth socket.
1854 TF/01 Fix ultimate retry timeouts for intermittently deliverable recipients.
1856 When a queue runner is handling a message, Exim first routes the
1857 recipient addresses, during which it prunes them based on the retry
1858 hints database. After that it attempts to deliver the message to
1859 any remaining recipients. It then updates the hints database using
1862 So if a recipient address works intermittently, it can get repeatedly
1863 deferred at routing time. The retry hints record remains fresh so the
1864 address never reaches the final cutoff time.
1866 This is a fairly common occurrence when a user is bumping up against
1867 their storage quota. Exim had some logic in its local delivery code
1868 to deal with this. However it did not apply to per-recipient defers
1869 in remote deliveries, e.g. over LMTP to a separate IMAP message store.
1871 This change adds a proper retry rule check during routing so that the
1872 final cutoff time is checked against the message's age. We only do
1873 this check if there is an address retry record and there is not a
1874 domain retry record; this implies that previous attempts to handle
1875 the address had the retry_use_local_parts option turned on. We use
1876 this as an approximation for the destination being like a local
1877 delivery, as in LMTP.
1879 I suspect this new check makes the old local delivery cutoff check
1880 redundant, but I have not verified this so I left the code in place.
1882 TF/02 Correct gecos expansion when From: is a prefix of the username.
1884 Test 0254 submits a message to Exim with the header
1888 When I ran the test suite under the user fanf2, Exim expanded
1889 the header to contain my full name, whereas it should have added
1890 a Resent-Sender: header. It erroneously treats any prefix of the
1891 username as equal to the username.
1893 This change corrects that bug.
1895 GF/01 DCC debug and logging tidyup
1896 Error conditions log to paniclog rather than rejectlog.
1897 Debug lines prefixed by "DCC: " to remove any ambiguity.
1899 TF/03 Avoid unnecessary rebuilds of lookup-related code.
1901 PP/14 Fix OCSP reinitialisation in SNI handling for Exim/TLS as server.
1902 Bug spotted by Jeremy Harris; was flawed since initial commit.
1903 Would have resulted in OCSP responses post-SNI triggering an Exim
1904 NULL dereference and crash.
1906 JH/13 Add $router_name and $transport_name variables. Bugzilla 308.
1908 PP/15 Define SIOCGIFCONF_GIVES_ADDR for GNU Hurd.
1909 Bug detection, analysis and fix by Samuel Thibault.
1910 Bugzilla 1331, Debian bug #698092.
1912 SC/01 Update eximstats to watch out for senders sending 'HELO [IpAddr]'
1914 JH/14 SMTP PRDR (http://www.eric-a-hall.com/specs/draft-hall-prdr-00.txt).
1915 Server implementation by Todd Lyons, client by JH.
1916 Only enabled when compiled with EXPERIMENTAL_PRDR. A new
1917 config variable "prdr_enable" controls whether the server
1918 advertises the facility. If the client requests PRDR a new
1919 acl_data_smtp_prdr ACL is called once for each recipient, after
1920 the body content is received and before the acl_smtp_data ACL.
1921 The client is controlled by both of: a hosts_try_prdr option
1922 on the smtp transport, and the server advertisement.
1923 Default client logging of deliveries and rejections involving
1924 PRDR are flagged with the string "PRDR".
1926 PP/16 Fix problems caused by timeouts during quit ACLs trying to double
1927 fclose(). Diagnosis by Todd Lyons.
1929 PP/17 Update configure.default to handle IPv6 localhost better.
1930 Patch by Alain Williams (plus minor tweaks).
1933 PP/18 OpenSSL made graceful with empty tls_verify_certificates setting.
1934 This is now consistent with GnuTLS, and is now documented: the
1935 previous undocumented portable approach to treating the option as
1936 unset was to force an expansion failure. That still works, and
1937 an empty string is now equivalent.
1939 PP/19 Renamed DNSSEC-enabling option to "dns_dnssec_ok", to make it
1940 clearer that Exim is using the DO (DNSSEC OK) EDNS0 resolver flag,
1941 not performing validation itself.
1943 PP/20 Added force_command boolean option to pipe transport.
1944 Patch from Nick Koston, of cPanel Inc.
1946 JH/15 AUTH support on callouts (and hence cutthrough-deliveries).
1949 TF/04 Added udpsend ACL modifier and hexquote expansion operator
1951 PP/21 Fix eximon continuous updating with timestamped log-files.
1952 Broken in a format-string cleanup in 4.80, missed when I repaired the
1953 other false fix of the same issue.
1954 Report and fix from Heiko Schlichting.
1957 PP/22 Guard LDAP TLS usage against Solaris LDAP variant.
1958 Report from Prashanth Katuri.
1960 PP/23 Support safari_ecdhe_ecdsa_bug for openssl_options.
1961 It's SecureTransport, so affects any MacOS clients which use the
1962 system-integrated TLS libraries, including email clients.
1964 PP/24 Fix segfault from trying to fprintf() to a NULL stdio FILE* if
1965 using a MIME ACL for non-SMTP local injection.
1966 Report and assistance in diagnosis by Warren Baker.
1968 TL/08 Adjust exiqgrep to be case-insensitive for sender/receiver.
1970 JH/16 Fix comparisons for 64b. Bugzilla 1385.
1972 TL/09 Add expansion variable $authenticated_fail_id to keep track of
1973 last id that failed so it may be referenced in subsequent ACL's.
1975 TL/10 Bugzilla 1375 - Prevent TLS rebinding in ldap. Patch provided by
1978 TL/11 Bugzilla 1382 - Option ldap_require_cert overrides start_tls
1979 ldap library initialization, allowing self-signed CA's to be
1980 used. Also properly sets require_cert option later in code by
1981 using NULL (global ldap config) instead of ldap handle (per
1982 session). Bug diagnosis and testing by alxgomz.
1984 TL/12 Enhanced documentation in the ratelimit.pl script provided in
1985 the src/util/ subdirectory.
1987 TL/13 Bug 1031 - Imported transport SQL logging patch from Axel Rau
1988 renamed to Transport Post Delivery Action by Jeremy Harris, as
1991 TL/14 Bugzilla 1217 - Redis lookup support has been added. It is only enabled
1992 when Exim is compiled with EXPERIMENTAL_REDIS. A new config variable
1993 redis_servers = needs to be configured which will be used by the redis
1994 lookup. Patch from Warren Baker, of The Packet Hub.
1996 TL/15 Fix exiqsumm summary for corner case. Patch provided by Richard Hall.
1998 TL/16 Bugzilla 1289 - Clarify host/ip processing when have errors looking up a
1999 hostname or reverse DNS when processing a host list. Used suggestions
2000 from multiple comments on this bug.
2002 TL/17 Bugzilla 1057 - Multiple clamd TCP targets patch from Mark Zealey.
2004 TL/18 Had previously added a -CONTINUE option to runtest in the test suite.
2005 Missed a few lines, added it to make the runtest require no keyboard
2008 TL/19 Bugzilla 1402 - Test 533 fails if any part of the path to the test suite
2009 contains upper case chars. Make router use caseful_local_part.
2011 TL/20 Bugzilla 1400 - Add AVOID_GNUTLS_PKCS11 build option. Allows GnuTLS
2012 support when GnuTLS has been built with p11-kit.
2018 PP/01 SECURITY: protect DKIM DNS decoding from remote exploit.
2020 This, or similar/improved, will also be change PP/11 of 4.82.
2026 PP/01 Handle short writes when writing local log-files.
2027 In practice, only affects FreeBSD (8 onwards).
2028 Bugzilla 1053, with thanks to Dmitry Isaikin.
2030 NM/01 Bugzilla 949 - Documentation tweak
2032 NM/02 Bugzilla 1093 - eximstats DATA reject detection regexps
2035 NM/03 Bugzilla 1169 - primary_hostname spelling was incorrect in docs.
2037 PP/02 Implemented gsasl authenticator.
2039 PP/03 Implemented heimdal_gssapi authenticator with "server_keytab" option.
2041 PP/04 Local/Makefile support for (AUTH|LOOKUP)_*_PC=foo to use
2042 `pkg-config foo` for cflags/libs.
2044 PP/05 Swapped $auth1/$auth2 for gsasl GSSAPI mechanism, to be more consistent
2045 with rest of GSASL and with heimdal_gssapi.
2047 PP/06 Local/Makefile support for USE_(GNUTLS|OPENSSL)_PC=foo to use
2048 `pkg-config foo` for cflags/libs for the TLS implementation.
2050 PP/07 New expansion variable $tls_bits; Cyrus SASL server connection
2051 properties get this fed in as external SSF. A number of robustness
2052 and debugging improvements to the cyrus_sasl authenticator.
2054 PP/08 cyrus_sasl server now expands the server_realm option.
2056 PP/09 Bugzilla 1214 - Log authentication information in reject log.
2057 Patch by Jeremy Harris.
2059 PP/10 Added dbmjz lookup type.
2061 PP/11 Let heimdal_gssapi authenticator take a SASL message without an authzid.
2063 PP/12 MAIL args handles TAB as well as SP, for better interop with
2064 non-compliant senders.
2065 Analysis and variant patch by Todd Lyons.
2067 NM/04 Bugzilla 1237 - fix cases where printf format usage not indicated
2068 Bug report from Lars Müller <lars@samba.org> (via SUSE),
2069 Patch from Dirk Mueller <dmueller@suse.com>
2071 PP/13 tls_peerdn now print-escaped for spool files.
2072 Observed some $tls_peerdn in wild which contained \n, which resulted
2073 in spool file corruption.
2075 PP/14 TLS fixes for OpenSSL: support TLS 1.1 & 1.2; new "openssl_options"
2076 values; set SSL_MODE_AUTO_RETRY so that OpenSSL will retry a read
2077 or write after TLS renegotiation, which otherwise led to messages
2080 TK/01 Bugzilla 1239 - fix DKIM verification when signature was not inserted
2081 as a tracking header (ie: a signed header comes before the signature).
2082 Patch from Wolfgang Breyha.
2084 JH/01 Bugzilla 660 - Multi-valued attributes from ldap now parseable as a
2085 comma-sep list; embedded commas doubled.
2087 JH/02 Refactored ACL "verify =" logic to table-driven dispatch.
2089 PP/15 LDAP: Check for errors of TLS initialisation, to give correct
2091 Report and patch from Dmitry Banschikov.
2093 PP/16 Removed "dont_insert_empty_fragments" from "openssl_options".
2094 Removed SSL_clear() after SSL_new() which led to protocol negotiation
2095 failures. We appear to now support TLS1.1+ with Exim.
2097 PP/17 OpenSSL: new expansion var $tls_sni, which if used in tls_certificate
2098 lets Exim select keys and certificates based upon TLS SNI from client.
2099 Also option tls_sni on SMTP Transports. Also clear $tls_bits correctly
2100 before an outbound SMTP session. New log_selector, +tls_sni.
2102 PP/18 Bugzilla 1122 - check localhost_number expansion for failure, avoid
2103 NULL dereference. Report and patch from Alun Jones.
2105 PP/19 DNS resolver init changes for NetBSD compatibility. (Risk of breakage
2106 on less well tested platforms). Obviates NetBSD pkgsrc patch-ac.
2107 Not seeing resolver debug output on NetBSD, but suspect this is a
2108 resolver implementation change.
2110 PP/20 Revert part of NM/04, it broke log_path containing %D expansions.
2111 Left warnings. Added "eximon gdb" invocation mode.
2113 PP/21 Defaulting "accept_8bitmime" to true, not false.
2115 PP/22 Added -bw for inetd wait mode support.
2117 PP/23 Added PCRE_CONFIG=yes support to Makefile for using pcre-config to
2118 locate the relevant includes and libraries. Made this the default.
2120 PP/24 Fixed headers_only on smtp transports (was not sending trailing dot).
2121 Bugzilla 1246, report and most of solution from Tomasz Kusy.
2123 JH/03 ${eval } now uses 64-bit and supports a "g" suffix (like to "k" and "m").
2124 This may cause build issues on older platforms.
2126 PP/25 Revamped GnuTLS support, passing tls_require_ciphers to
2127 gnutls_priority_init, ignoring Exim options gnutls_require_kx,
2128 gnutls_require_mac & gnutls_require_protocols (no longer supported).
2129 Added SNI support via GnuTLS too.
2130 Made ${randint:..} supplier available, if using not-too-old GnuTLS.
2132 PP/26 Added EXPERIMENTAL_OCSP for OpenSSL.
2134 PP/27 Applied dnsdb SPF support patch from Janne Snabb.
2135 Applied second patch from Janne, implementing suggestion to default
2136 multiple-strings-in-record handling to match SPF spec.
2138 JH/04 Added expansion variable $tod_epoch_l for a higher-precision time.
2140 PP/28 Fix DCC dcc_header content corruption (stack memory referenced,
2141 read-only, out of scope).
2142 Patch from Wolfgang Breyha, report from Stuart Northfield.
2144 PP/29 Fix three issues highlighted by clang analyser static analysis.
2145 Only crash-plausible issue would require the Cambridge-specific
2146 iplookup router and a misconfiguration.
2147 Report from Marcin Mirosław.
2149 PP/30 Another attempt to deal with PCRE_PRERELEASE, this one less buggy.
2151 PP/31 %D in printf continues to cause issues (-Wformat=security), so for
2152 now guard some of the printf checks behind WANT_DEEPER_PRINTF_CHECKS.
2153 As part of this, removing so much warning spew let me fix some minor
2154 real issues in debug logging.
2156 PP/32 GnuTLS was always using default tls_require_ciphers, due to a missing
2157 assignment on my part. Fixed.
2159 PP/33 Added tls_dh_max_bits option, defaulting to current hard-coded limit
2160 of NSS, for GnuTLS/NSS interop. Problem root cause diagnosis by
2161 Janne Snabb (who went above and beyond: thank you).
2163 PP/34 Validate tls_require_ciphers on startup, since debugging an invalid
2164 string otherwise requires a connection and a bunch more work and it's
2165 relatively easy to get wrong. Should also expose TLS library linkage
2168 PP/35 Pull in <features.h> on Linux, for some portability edge-cases of
2169 64-bit ${eval} (JH/03).
2171 PP/36 Define _GNU_SOURCE in exim.h; it's needed for some releases of
2172 GNU libc to support some of the 64-bit stuff, should not lead to
2173 conflicts. Defined before os.h is pulled in, so if a given platform
2174 needs to override this, it can.
2176 PP/37 Unbreak Cyrus SASL auth: SSF retrieval was incorrect, Exim thought
2177 protection layer was required, which is not implemented.
2178 Bugzilla 1254, patch from Wolfgang Breyha.
2180 PP/38 Overhaul DH prime handling, supply RFC-specified DH primes as built
2181 into Exim, default to IKE id 23 from RFC 5114 (2048 bit). Make
2182 tls_dhparam take prime identifiers. Also unbreak combination of
2183 OpenSSL+DH_params+TLSSNI.
2185 PP/39 Disable SSLv2 by default in OpenSSL support.
2191 PP/01 Solaris build fix for Oracle's LDAP libraries.
2192 Bugzilla 1109, patch from Stephen Usher.
2194 TF/01 HP/UX build fix: avoid arithmetic on a void pointer.
2196 TK/01 DKIM Verification: Fix relaxed canon for empty headers w/o
2199 TF/02 Fix a couple more cases where we did not log the error message
2200 when unlink() failed. See also change 4.74-TF/03.
2202 TF/03 Make the exiwhat support code safe for signals. Previously Exim might
2203 lock up or crash if it happened to be inside a call to libc when it
2204 got a SIGUSR1 from exiwhat.
2206 The SIGUSR1 handler appends the current process status to the process
2207 log which is later printed by exiwhat. It used to use the general
2208 purpose logging code to do this, but several functions it calls are
2209 not safe for signals.
2211 The new output code in the SIGUSR1 handler is specific to the process
2212 log, and simple enough that it's easy to inspect for signal safety.
2213 Removing some special cases also simplifies the general logging code.
2214 Removing the spurious timestamps from the process log simplifies
2217 TF/04 Improved ratelimit ACL condition.
2219 The /noupdate option has been deprecated in favour of /readonly which
2220 has clearer semantics. The /leaky, /strict, and /readonly update modes
2221 are mutually exclusive. The update mode is no longer included in the
2222 database key; it just determines when the database is updated. (This
2223 means that when you upgrade Exim will forget old rate measurements.)
2225 Exim now checks that the per_* options are used with an update mode that
2226 makes sense for the current ACL. For example, when Exim is processing a
2227 message (e.g. acl_smtp_rcpt or acl_smtp_data, etc.) you can specify
2228 per_mail/leaky or per_mail/strict; otherwise (e.g. in acl_smtp_helo) you
2229 must specify per_mail/readonly. If you omit the update mode it defaults to
2230 /leaky where that makes sense (as before) or /readonly where required.
2232 The /noupdate option is now undocumented but still supported for
2233 backwards compatibility. It is equivalent to /readonly except that in
2234 ACLs where /readonly is required you may specify /leaky/noupdate or
2235 /strict/noupdate which are treated the same as /readonly.
2237 A useful new feature is the /count= option. This is a generalization
2238 of the per_byte option, so that you can measure the throughput of other
2239 aggregate values. For example, the per_byte option is now equivalent
2240 to per_mail/count=${if >{0}{$message_size} {0} {$message_size} }.
2242 The per_rcpt option has been generalized using the /count= mechanism
2243 (though it's more complicated than the per_byte equivalence). When it is
2244 used in acl_smtp_rcpt, the per_rcpt option adds recipients to the
2245 measured rate one at a time; if it is used later (e.g. in acl_smtp_data)
2246 or in a non-SMTP ACL it adds all the recipients in one go. (The latter
2247 /count=$recipients_count behaviour used to work only in non-SMTP ACLs.)
2248 Note that using per_rcpt with a non-readonly update mode in more than
2249 one ACL will cause the recipients to be double-counted. (The per_mail
2250 and per_byte options don't have this problem.)
2252 The handling of very low rates has changed slightly. If the computed rate
2253 is less than the event's count (usually one) then this event is the first
2254 after a long gap. In this case the rate is set to the same as this event's
2255 count, so that the first message of a spam run is counted properly.
2257 The major new feature is a mechanism for counting the rate of unique
2258 events. The new per_addr option counts the number of different
2259 recipients that someone has sent messages to in the last time period. It
2260 behaves like per_rcpt if all the recipient addresses are different, but
2261 duplicate recipient addresses do not increase the measured rate. Like
2262 the /count= option this is a general mechanism, so the per_addr option
2263 is equivalent to per_rcpt/unique=$local_part@$domain. You can, for
2264 example, measure the rate that a client uses different sender addresses
2265 with the options per_mail/unique=$sender_address. There are further
2266 details in the main documentation.
2268 TF/05 Removed obsolete $Cambridge$ CVS revision strings.
2270 TF/06 Removed a few PCRE remnants.
2272 TF/07 Automatically extract Exim's version number from tags in the git
2273 repository when doing development or release builds.
2275 PP/02 Raise smtp_cmd_buffer_size to 16kB.
2276 Bugzilla 879. Patch from Paul Fisher.
2278 PP/03 Implement SSL-on-connect outbound with protocol=smtps on smtp transport.
2279 Heavily based on revision 40f9a89a from Simon Arlott's tree.
2282 PP/04 Use .dylib instead of .so for dynamic library loading on MacOS.
2284 PP/05 Variable $av_failed, true if the AV scanner deferred.
2285 Bugzilla 1078. Patch from John Horne.
2287 PP/06 Stop make process more reliably on build failure.
2288 Bugzilla 1087. Patch from Heiko Schlittermann.
2290 PP/07 Make maildir_use_size_file an _expandable_ boolean.
2291 Bugzilla 1089. Patch from Heiko Schlittermann.
2293 PP/08 Handle ${run} returning more data than OS pipe buffer size.
2294 Bugzilla 1131. Patch from Holger Weiß.
2296 PP/09 Handle IPv6 addresses with SPF.
2297 Bugzilla 860. Patch from Wolfgang Breyha.
2299 PP/10 GnuTLS: support TLS 1.2 & 1.1.
2301 Use gnutls_certificate_verify_peers2() [patch from Andreas Metzler].
2304 PP/11 match_* no longer expand right-hand-side by default.
2305 New compile-time build option, EXPAND_LISTMATCH_RHS.
2306 New expansion conditions, "inlist", "inlisti".
2308 PP/12 fix uninitialised greeting string from PP/03 (smtps client support).
2310 PP/13 shell and compiler warnings fixes for RC1-RC4 changes.
2312 PP/14 fix log_write() format string regression from TF/03.
2313 Bugzilla 1152. Patch from Dmitry Isaikin.
2319 PP/01 The new ldap_require_cert option would segfault if used. Fixed.
2321 PP/02 Harmonised TLS library version reporting; only show if debugging.
2322 Layout now matches that introduced for other libraries in 4.74 PP/03.
2324 PP/03 New openssl_options items: no_sslv2 no_sslv3 no_ticket no_tlsv1
2326 PP/04 New "dns_use_edns0" global option.
2328 PP/05 Don't segfault on misconfiguration of ref:name exim-user as uid.
2331 PP/06 Extra paranoia around buffer usage at the STARTTLS transition.
2332 nb: Exim is not vulnerable to http://www.kb.cert.org/vuls/id/555316
2334 TK/01 Updated PolarSSL code to 0.14.2.
2335 Bugzilla 1097. Patch from Andreas Metzler.
2337 PP/07 Catch divide-by-zero in ${eval:...}.
2338 Fixes bugzilla 1102.
2340 PP/08 Condition negation of bool{}/bool_lax{} did not negate. Fixed.
2343 TK/02 Bugzilla 1106: CVE-2011-1764 - DKIM log line was subject to a
2344 format-string attack -- SECURITY: remote arbitrary code execution.
2346 TK/03 SECURITY - DKIM signature header parsing was double-expanded, second
2347 time unintentionally subject to list matching rules, letting the header
2348 cause arbitrary Exim lookups (of items which can occur in lists, *not*
2349 arbitrary string expansion). This allowed for information disclosure.
2351 PP/09 Fix another SIGFPE (x86) in ${eval:...} expansion, this time related to
2352 INT_MIN/-1 -- value coerced to INT_MAX.
2358 NM/01 Workaround for PCRE version dependency in version reporting
2361 TF/01 Update valgrind.h and memcheck.h to copies from valgrind-3.6.0.
2362 This fixes portability to compilers other than gcc, notably
2363 Solaris CC and HP-UX CC. Fixes Bugzilla 1050.
2365 TF/02 Bugzilla 139: Avoid using the += operator in the modular lookup
2366 makefiles for portability to HP-UX and POSIX correctness.
2368 PP/01 Permit LOOKUP_foo enabling on the make command-line.
2369 Also via indented variable definition in the Makefile.
2370 (Debugging by Oliver Heesakkers).
2372 PP/02 Restore caching of spamd results with expanded spamd_address.
2373 Patch from author of expandable spamd_address patch, Wolfgang Breyha.
2375 PP/03 Build issue: lookups-Makefile now exports LC_ALL=C
2376 Improves build reliability. Fix from: Frank Elsner
2378 NM/02 Fix wide character breakage in the rfc2047 coding
2379 Fixes bug 1064. Patch from Andrey N. Oktyabrski
2381 NM/03 Allow underscore in dnslist lookups
2382 Fixes bug 1026. Patch from Graeme Fowler
2384 PP/04 Bugzilla 230: Support TLS-enabled LDAP (in addition to ldaps).
2385 Code patches from Adam Ciarcinski of NetBSD.
2387 NM/04 Fixed exiqgrep to cope with mailq missing size issue
2390 PP/05 Bugzilla 1083: when lookup expansion defers, escape the output which
2391 is logged, to avoid truncation. Patch from John Horne.
2393 PP/06 Bugzilla 1042: implement freeze_signal on pipe transports.
2394 Patch from Jakob Hirsch.
2396 PP/07 Bugzilla 1061: restrict error messages sent over SMTP to not reveal
2397 SQL string expansion failure details.
2398 Patch from Andrey Oktyabrski.
2400 PP/08 Bugzilla 486: implement %M datestamping in log filenames.
2401 Patch from Simon Arlott.
2403 PP/09 New lookups functionality failed to compile on old gcc which rejects
2404 extern declarations in function scope.
2405 Patch from Oliver Fleischmann
2407 PP/10 Use sig_atomic_t for flags set from signal handlers.
2408 Check getgroups() return and improve debugging.
2409 Fixed developed for diagnosis in bug 927 (which turned out to be
2412 PP/11 Bugzilla 1055: Update $message_linecount for maildir_tag.
2413 Patch from Mark Zealey.
2415 PP/12 Bugzilla 1056: Improved spamd server selection.
2416 Patch from Mark Zealey.
2418 PP/13 Bugzilla 1086: Deal with maildir quota file races.
2419 Based on patch from Heiko Schlittermann.
2421 PP/14 Bugzilla 1019: DKIM multiple signature generation fix.
2422 Patch from Uwe Doering, sign-off by Michael Haardt.
2424 NM/05 Fix to spam.c to accommodate older gcc versions which dislike
2425 variable declaration deep within a block. Bug and patch from
2428 PP/15 lookups-Makefile IRIX compatibility coercion.
2430 PP/16 Make DISABLE_DKIM build knob functional.
2432 NM/06 Bugzilla 968: child_open_uid: restore default SIGPIPE handler
2433 Patch by Simon Arlott
2435 TF/03 Fix valgrind.h portability to C89 compilers that do not support
2436 variable argument macros. Our copy now differs from upstream.
2442 TF/01 Failure to get a lock on a hints database can have serious
2443 consequences so log it to the panic log.
2445 TF/02 Log LMTP confirmation messages in the same way as SMTP,
2446 controlled using the smtp_confirmation log selector.
2448 TF/03 Include the error message when we fail to unlink a spool file.
2450 DW/01 Bugzilla 139: Support dynamically loaded lookups as modules.
2451 With thanks to Steve Haslam, Johannes Berg & Serge Demonchaux
2452 for maintaining out-of-tree patches for some time.
2454 PP/01 Bugzilla 139: Documentation and portability issues.
2455 Avoid GNU Makefile-isms, let Exim continue to build on BSD.
2456 Handle per-OS dynamic-module compilation flags.
2458 PP/02 Let /dev/null have normal permissions.
2459 The 4.73 fixes were a little too stringent and complained about the
2460 permissions on /dev/null. Exempt it from some checks.
2461 Reported by Andreas M. Kirchwitz.
2463 PP/03 Report version information for many libraries, including
2464 Exim version information for dynamically loaded libraries. Created
2465 version.h, now support a version extension string for distributors
2466 who patch heavily. Dynamic module ABI change.
2468 PP/04 CVE-2011-0017 - check return value of setuid/setgid. This is a
2469 privilege escalation vulnerability whereby the Exim run-time user
2470 can cause root to append content of the attacker's choosing to
2473 PP/05 Bugzilla 1041: merged DCC maintainer's fixes for return code.
2476 PP/06 Bugzilla 1071: fix delivery logging with untrusted macros.
2477 If dropping privileges for untrusted macros, we disabled normal logging
2478 on the basis that it would fail; for the Exim run-time user, this is not
2479 the case, and it resulted in successful deliveries going unlogged.
2480 Fixed. Reported by Andreas Metzler.
2486 PP/01 Date: & Message-Id: revert to normally being appended to a message,
2487 only prepend for the Resent-* case. Fixes regression introduced in
2488 Exim 4.70 by NM/22 for Bugzilla 607.
2490 PP/02 Include check_rfc2047_length in configure.default because we're seeing
2491 increasing numbers of administrators be bitten by this.
2493 JJ/01 Added DISABLE_DKIM and comment to src/EDITME
2495 PP/03 Bugzilla 994: added openssl_options main configuration option.
2497 PP/04 Bugzilla 995: provide better SSL diagnostics on failed reads.
2499 PP/05 Bugzilla 834: provide a permit_coredump option for pipe transports.
2501 PP/06 Adjust NTLM authentication to handle SASL Initial Response.
2503 PP/07 If TLS negotiated an anonymous cipher, we could end up with SSL but
2504 without a peer certificate, leading to a segfault because of an
2505 assumption that peers always have certificates. Be a little more
2506 paranoid. Problem reported by Martin Tscholak.
2508 PP/08 Bugzilla 926: switch ClamAV to use the new zINSTREAM API for content
2509 filtering; old API available if built with WITH_OLD_CLAMAV_STREAM=yes
2510 NB: ClamAV planning to remove STREAM in "middle of 2010".
2511 CL also introduces -bmalware, various -d+acl logging additions and
2512 more caution in buffer sizes.
2514 PP/09 Implemented reverse_ip expansion operator.
2516 PP/10 Bugzilla 937: provide a "debug" ACL control.
2518 PP/11 Bugzilla 922: Documentation dusting, patch provided by John Horne.
2520 PP/12 Bugzilla 973: Implement --version.
2522 PP/13 Bugzilla 752: Refuse to build/run if Exim user is root/0.
2524 PP/14 Build without WITH_CONTENT_SCAN. Path from Andreas Metzler.
2526 PP/15 Bugzilla 816: support multiple condition rules on Routers.
2528 PP/16 Add bool_lax{} expansion operator and use that for combining multiple
2529 condition rules, instead of bool{}. Make both bool{} and bool_lax{}
2530 ignore trailing whitespace.
2532 JJ/02 prevent non-panic DKIM error from being sent to paniclog
2534 JJ/03 added tcp_wrappers_daemon_name to allow host entries other than
2537 PP/17 Fix malware regression for cmdline scanner introduced in PP/08.
2538 Notification from Dr Andrew Aitchison.
2540 PP/18 Change ClamAV response parsing to be more robust and to handle ClamAV's
2541 ExtendedDetectionInfo response format.
2542 Notification from John Horne.
2544 PP/19 OpenSSL 1.0.0a compatibility const-ness change, should be backwards
2547 PP/20 Added a CONTRIBUTING file. Fixed the documentation build to use http:
2548 XSL and documented dependency on system catalogs, with examples of how
2551 DW/21 Added Valgrind hooks in store.c to help it capture out-of-bounds store
2554 DW/22 Bugzilla 1044: CVE-2010-4345 - partial fix: restrict default behaviour
2555 of CONFIGURE_OWNER and CONFIGURE_GROUP options to no longer allow a
2556 configuration file which is writeable by the Exim user or group.
2558 DW/23 Bugzilla 1044: CVE-2010-4345 - part two: extend checks for writeability
2559 of configuration files to cover files specified with the -C option if
2560 they are going to be used with root privileges, not just the default
2563 DW/24 Bugzilla 1044: CVE-2010-4345 - part three: remove ALT_CONFIG_ROOT_ONLY
2564 option (effectively making it always true).
2566 DW/25 Add TRUSTED_CONFIG_PREFIX_FILE option to allow alternative configuration
2567 files to be used while preserving root privileges.
2569 DW/26 Set FD_CLOEXEC on SMTP sockets after forking in the daemon, to ensure
2570 that rogue child processes cannot use them.
2572 PP/27 Bugzilla 1047: change the default for system_filter_user to be the Exim
2573 run-time user, instead of root.
2575 PP/28 Add WHITELIST_D_MACROS option to let some macros be overridden by the
2576 Exim run-time user without dropping privileges.
2578 DW/29 Remove use of va_copy() which breaks pre-C99 systems. Duplicate the
2579 result string, instead of calling string_vformat() twice with the same
2582 DW/30 Allow TRUSTED_CONFIG_PREFIX_FILE only for Exim or CONFIGURE_OWNER, not
2583 for other users. Others should always drop root privileges if they use
2584 -C on the command line, even for a whitelisted configure file.
2586 DW/31 Turn TRUSTED_CONFIG_PREFIX_FILE into TRUSTED_CONFIG_FILE. No prefixes.
2588 NM/01 Fixed bug #1002 - Message loss when using multiple deliveries
2594 JJ/01 installed exipick 20100104.1, adding $max_received_linelength,
2595 $data_path, and $header_path variables; fixed documentation bugs and
2598 JJ/02 installed exipick 20100222.0, added --input-dir and --finput to allow
2599 exipick to access non-standard spools, including the "frozen" queue
2602 NM/01 Bugzilla 965: Support mysql stored procedures.
2603 Patch from Alain Williams
2605 NM/02 Bugzilla 961: Spacing fix (syntax error) on Makefile directives for NetBSD
2607 NM/03 Bugzilla 955: Documentation fix for max_rcpts.
2608 Patch from Andreas Metzler
2610 NM/04 Bugzilla 954: Fix for unknown responses from Dovecot authenticator.
2611 Patch from Kirill Miazine
2613 NM/05 Bugzilla 671: Added umask to procmail example.
2615 JJ/03 installed exipick 20100323.0, fixing doc bug
2617 NM/06 Bugzilla 988: CVE-2010-2023 - prevent hardlink attack on sticky mail
2618 directory. Notification and patch from Dan Rosenberg.
2620 TK/01 PDKIM: Upgrade PolarSSL files to upstream version 0.12.1.
2622 TK/02 Improve log output when DKIM signing operation fails.
2624 MH/01 Treat the transport option dkim_domain as a colon separated
2625 list, not as a single string, and sign the message with each element,
2626 omitting multiple occurences of the same signer.
2628 NM/07 Null terminate DKIM strings, Null initialise DKIM variable
2629 Bugzilla 985, 986. Patch by Simon Arlott
2631 NM/08 Bugzilla 967. dnsdb DNS TXT record bug fix (DKIM-related)
2632 Patch by Simon Arlott
2634 PP/01 Bugzilla 989: CVE-2010-2024 - work round race condition on
2635 MBX locking. Notification from Dan Rosenberg.
2641 TK/01 Bugzilla 912: Fix DKIM segfault on empty headers/body.
2643 NM/01 Bugzilla 913: Documentation fix for gnutls_* options.
2645 NM/02 Bugzilla 722: Documentation for randint. Better randomness defaults.
2647 NM/03 Bugzilla 847: Enable DNSDB lookup by default.
2649 NM/04 Bugzilla 915: Flag broken perl installation during build.
2655 TK/01 Added patch by Johannes Berg that expands the main option
2656 "spamd_address" if it starts with a dollar sign.
2658 TK/02 Write list of recipients to X-Envelope-Sender header when building
2659 the mbox-format spool file for content scanning (suggested by Jakob
2662 TK/03 Added patch by Wolfgang Breyha that adds experimental DCC
2663 (http://www.dcc-servers.net/) support via dccifd. Activated by
2664 setting EXPERIMENTAL_DCC=yes in Local/Makefile.
2666 TK/04 Bugzilla 673: Add f-protd malware scanner support. Patch submitted
2667 by Mark Daniel Reidel <mr@df.eu>.
2669 NM/01 Bugzilla 657: Embedded PCRE removed from the exim source tree.
2670 When building exim an external PCRE library is now needed -
2671 PCRE is a system library on the majority of modern systems.
2672 See entry on PCRE_LIBS in EDITME file.
2674 NM/02 Bugzilla 646: Removed unwanted C/R in Dovecot authenticator
2675 conversation. Added nologin parameter to request.
2676 Patch contributed by Kirill Miazine.
2678 TF/01 Do not log submission mode rewrites if they do not change the address.
2680 TF/02 Bugzilla 662: Fix stack corruption before exec() in daemon.c.
2682 NM/03 Bugzilla 602: exicyclog now handles panic log, and creates empty
2683 log files in place. Contributed by Roberto Lima.
2685 NM/04 Bugzilla 667: Close socket used by dovecot authenticator.
2687 TF/03 Bugzilla 615: When checking the local_parts router precondition
2688 after a local_part_suffix or local_part_prefix option, Exim now
2689 does not use the address's named list lookup cache, since this
2690 contains cached lookups for the whole local part.
2692 NM/05 Bugzilla 521: Integrated SPF Best Guess support contributed by
2693 Robert Millan. Documentation is in experimental-spec.txt.
2695 TF/04 Bugzilla 668: Fix parallel build (make -j).
2697 NM/05.2 Bugzilla 437: Prevent Maildir aux files being created with mode 000.
2699 NM/05.3 Bugzilla 598: Improvement to Dovecot authenticator handling.
2700 Patch provided by Jan Srzednicki.
2702 TF/05 Leading white space used to be stripped from $spam_report which
2703 wrecked the formatting. Now it is preserved.
2705 TF/06 Save $spam_score, $spam_bar, and $spam_report in spool files, so
2706 that they are available at delivery time.
2708 TF/07 Fix the way ${extract is skipped in the untaken branch of a conditional.
2710 TF/08 TLS error reporting now respects the incoming_interface and
2711 incoming_port log selectors.
2713 TF/09 Produce a more useful error message if an SMTP transport's hosts
2714 setting expands to an empty string.
2716 NM/06 Bugzilla 744: EXPN did not work under TLS.
2717 Patch provided by Phil Pennock.
2719 NM/07 Bugzilla 769: Extraneous comma in usage fprintf
2720 Patch provided by Richard Godbee.
2722 NM/08 Fixed erroneous documentation references to smtp_notquit_acl to be
2723 acl_smtp_notquit, added index entry.
2725 NM/09 Bugzilla 787: Potential buffer overflow in string_format.
2726 Patch provided by Eugene Bujak.
2728 NM/10 Bugzilla 770: Problem on some platforms modifying the len parameter to
2729 accept(). Patch provided by Maxim Dounin.
2731 NM/11 Bugzilla 749: Preserve old behaviour of blanks comparing equal to zero.
2732 Patch provided by Phil Pennock.
2734 NM/12 Bugzilla 497: Correct behaviour of exiwhat when no config exists.
2736 NM/13 Bugzilla 590: Correct handling of Resent-Date headers.
2737 Patch provided by Brad "anomie" Jorsch.
2739 NM/14 Bugzilla 622: Added timeout setting to transport filter.
2740 Patch provided by Dean Brooks.
2742 TK/05 Add native DKIM support (does not depend on external libraries).
2744 NM/15 Bugzilla 854: Removed code that symlinks to pcre as its no longer useful.
2745 Patch provided by Graeme Fowler.
2747 NM/16 Bugzilla 851: Documentation example syntax fix.
2749 NM/17 Changed NOTICE file to remove references to embedded PCRE.
2751 NM/18 Bugzilla 894: Fix issue with very long lines including comments in
2754 NM/19 Bugzilla 745: TLS version reporting.
2755 Patch provided by Phil Pennock.
2757 NM/20 Bugzilla 167: bool: condition support.
2758 Patch provided by Phil Pennock.
2760 NM/21 Bugzilla 665: gnutls_compat_mode to allow compatibility with broken
2761 clients. Patch provided by Phil Pennock.
2763 NM/22 Bugzilla 607: prepend (not append) Resent-Message-ID and Resent-Date.
2764 Patch provided by Brad "anomie" Jorsch.
2766 NM/23 Bugzilla 687: Fix misparses in eximstats.
2767 Patch provided by Heiko Schlittermann.
2769 NM/24 Bugzilla 688: Fix exiwhat to handle log_selector = +pid.
2770 Patch provided by Heiko Schlittermann.
2772 NM/25 Bugzilla 727: Use transport mode as default mode for maildirsize file.
2773 plus update to original patch.
2775 NM/26 Bugzilla 799: Documentation correction for ratelimit.
2777 NM/27 Bugzilla 802: Improvements to local interface IP addr detection.
2778 Patch provided by David Brownlee.
2780 NM/28 Bugzilla 807: Improvements to LMTP delivery logging.
2782 NM/29 Bugzilla 862, 866, 875: Documentation bugfixes.
2784 NM/30 Bugzilla 888: TLS documentation bugfixes.
2786 NM/31 Bugzilla 896: Dovecot buffer overrun fix.
2788 NM/32 Bugzilla 889: Change all instances of "expr" in shell scripts to "expr --"
2789 Unlike the original bugzilla I have changed all shell scripts in src tree.
2791 NM/33 Bugzilla 898: Transport filter timeout fix.
2792 Patch by Todd Rinaldo.
2794 NM/34 Bugzilla 901: Fix sign/unsigned and UTF mismatches.
2795 Patch by Serge Demonchaux.
2797 NM/35 Bugzilla 39: Base64 decode bug fixes.
2798 Patch by Jakob Hirsch.
2800 NM/36 Bugzilla 909: Correct connect() call in dcc code.
2802 NM/37 Bugzilla 910: Correct issue with relaxed/simple handling.
2804 NM/38 Bugzilla 908: Removed NetBSD3 support as no longer needed.
2806 NM/39 Bugzilla 911: Fixed MakeLinks build script.
2812 TK/01 Add preliminary DKIM support. Currently requires a forked version of
2813 ALT-N's libdkim that I have put here:
2814 http://duncanthrax.net/exim-experimental/
2816 Note to Michael Haardt: I had to rename some vars in sieve.c. They
2817 were called 'true' and it seems that C99 defines that as a reserved
2818 keyword to be used with 'bool' variable types. That means you could
2819 not include C99-style headers which use bools without triggering
2820 build errors in sieve.c.
2822 NM/01 Bugzilla 592: --help option is handled incorrectly if exim is invoked
2823 as mailq or other aliases. Changed the --help handling significantly
2824 to do whats expected. exim_usage() emits usage/help information.
2826 SC/01 Added the -bylocaldomain option to eximstats.
2828 NM/02 Bugzilla 619: Defended against bad data coming back from gethostbyaddr.
2830 NM/03 Bugzilla 613: Documentation fix for acl_not_smtp.
2832 NM/04 Bugzilla 628: PCRE update to 7.4 (work done by John Hall).
2838 PH/01 Another patch from the Sieve maintainer.
2840 PH/02 When an IPv6 address is converted to a string for single-key lookup
2841 in an address list (e.g. for an item such as "net24-dbm;/net/works"),
2842 dots are used instead of colons so that keys in lsearch files need not
2843 contain colons. This was done some time before quoting was made available
2844 in lsearch files. However, iplsearch files do require colons in IPv6 keys
2845 (notated using the quote facility) so as to distinguish them from IPv4
2846 keys. This meant that lookups for IP addresses in host lists did not work
2847 for iplsearch lookups.
2849 This has been fixed by arranging for IPv6 addresses to be expressed with
2850 colons if the lookup type is iplsearch. This is not incompatible, because
2851 previously such lookups could never work.
2853 The situation is now rather anomalous, since one *can* have colons in
2854 ordinary lsearch keys. However, making the change in all cases is
2855 incompatible and would probably break a number of configurations.
2857 TK/01 Change PRVS address formatting scheme to reflect latests BATV draft
2860 MH/01 The "spam" ACL condition code contained a sscanf() call with a %s
2861 conversion specification without a maximum field width, thereby enabling
2862 a rogue spamd server to cause a buffer overflow. While nobody in their
2863 right mind would setup Exim to query an untrusted spamd server, an
2864 attacker that gains access to a server running spamd could potentially
2865 exploit this vulnerability to run arbitrary code as the Exim user.
2867 TK/02 Bugzilla 502: Apply patch to make the SPF-Received: header use
2868 $primary_hostname instead of what libspf2 thinks the hosts name is.
2870 MH/02 The dsearch lookup now uses lstat(2) instead of stat(2) to look for
2871 a directory entry by the name of the lookup key. Previously, if a
2872 symlink pointed to a non-existing file or a file in a directory that
2873 Exim lacked permissions to read, a lookup for a key matching that
2874 symlink would fail. Now it is enough that a matching directory entry
2875 exists, symlink or not. (Bugzilla 503.)
2877 PH/03 The body_linecount and body_zerocount variables are now exported in the
2880 PH/04 Added the $dnslist_matched variable.
2882 PH/05 Unset $tls_cipher and $tls_peerdn before making a connection as a client.
2883 This means they are set thereafter only if the connection becomes
2886 PH/06 Added the client_condition to authenticators so that some can be skipped
2887 by clients under certain conditions.
2889 PH/07 The error message for a badly-placed control=no_multiline_responses left
2890 "_responses" off the end of the name.
2892 PH/08 Added -Mvc to output a copy of a message in RFC 2822 format.
2894 PH/09 Tidied the code for creating ratelimiting keys, creating them explicitly
2895 (without spaces) instead of just copying the configuration text.
2897 PH/10 Added the /noupdate option to the ratelimit ACL condition.
2899 PH/11 Added $max_received_linelength.
2901 PH/12 Added +ignore_defer and +include_defer to host lists.
2903 PH/13 Installed PCRE version 7.2. This needed some changes because of the new
2904 way in which PCRE > 7.0 is built.
2906 PH/14 Implemented queue_only_load_latch.
2908 PH/15 Removed an incorrect (int) cast when reading the value of SIZE in a
2909 MAIL command. The effect was to mangle the value on 64-bit systems.
2911 PH/16 Another patch from the Sieve maintainer.
2913 PH/17 Added the NOTQUIT ACL, based on a patch from Ted Cooper.
2915 PH/18 If a system quota error occurred while trying to create the file for
2916 a maildir delivery, the message "Mailbox is full" was not appended to the
2917 bounce if the delivery eventually timed out. Change 4.67/27 below applied
2918 only to a quota excession during the actual writing of the file.
2920 PH/19 It seems that peer DN values may contain newlines (and other non-printing
2921 characters?) which causes problems in log lines. The DN values are now
2922 passed through string_printing() before being added to log lines.
2924 PH/20 Added the "servers=" facility to MySQL and PostgreSQL lookups. (Oracle
2925 and InterBase are left for another time.)
2927 PH/21 Added message_body_newlines option.
2929 PH/22 Guard against possible overflow in moan_check_errorcopy().
2931 PH/23 POSIX allows open() to be a macro; guard against that.
2933 PH/24 If the recipient of an error message contained an @ in the local part
2934 (suitably quoted, of course), incorrect values were put in $domain and
2935 $local_part during the evaluation of errors_copy.
2941 MH/01 Fix for bug #448, segfault in Dovecot authenticator when interface_address
2942 is unset (happens when testing with -bh and -oMi isn't used). Thanks to
2945 PH/01 Added a new log selector smtp_no_mail, to log SMTP sessions that do not
2946 issue a MAIL command.
2948 PH/02 In an ACL statement such as
2950 deny dnslists = X!=127.0.0.2 : X=127.0.0.2
2952 if a client was not listed at all, or was listed with a value other than
2953 127.0.0.2, in the X list, but was listed with 127.0.0.2 in the Y list,
2954 the condition was not true (as it should be), so access was not denied.
2955 The bug was that the ! inversion was incorrectly passed on to the second
2956 item. This has been fixed.
2958 PH/03 Added additional dnslists conditions == and =& which are different from
2959 = and & when the dns lookup returns more than one IP address.
2961 PH/04 Added gnutls_require_{kx,mac,protocols} to give more control over the
2962 cipher suites used by GnuTLS. These options are ignored by OpenSSL.
2964 PH/05 After discussion on the list, added a compile time option ENABLE_DISABLE_
2965 FSYNC, which compiles an option called disable_fsync that allows for
2966 bypassing fsync(). The documentation is heavily laced with warnings.
2968 SC/01 Updated eximstats to collate all SpamAssassin rejects into one bucket.
2970 PH/06 Some tidies to the infrastructure of the Test Suite that is concerned
2971 with the auxiliary C programs that it uses: (1) Arrange for BIND_8_COMPAT
2972 to be defined when compiling on OSX (Darwin); (2) Tidies to the Makefile,
2973 including adding "make clean"; (3) Added -fPIC when compiling the test
2974 dynamically loaded module, to get rid of a warning.
2976 MH/02 Fix for bug #451, causing paniclog entries to be written if a bounce
2977 message fails, move_frozen_messages = true and ignore_bounce_errors_after
2978 = 0s. The bug is otherwise harmless.
2980 PH/07 There was a bug in the dovecot authenticator such that the value of
2981 $auth1 could be overwritten, and so not correctly preserved, after a
2982 successful authentication. This usually meant that the value preserved by
2983 the server_setid option was incorrect.
2985 PH/08 Added $smtp_count_at_connection_start, deliberately with a long name.
2987 PH/09 Installed PCRE release 7.0.
2989 PH/10 The acl_not_smtp_start ACL was, contrary to the documentation, not being
2990 run for batched SMTP input. It is now run at the start of every message
2991 in the batch. While fixing this I discovered that the process information
2992 (output by running exiwhat) was not always getting set for -bs and -bS
2993 input. This is fixed, and it now also says "batched" for BSMTP.
2995 PH/11 Added control=no_pipelining.
2997 PH/12 Added $sending_ip_address and $sending_port (mostly Magnus Holmgren's
2998 patch, slightly modified), and move the expansion of helo_data till after
2999 the connection is made in the smtp transport (so it can use these
3002 PH/13 Added ${rfc2047d: to decoded RFC 2047 strings.
3004 PH/14 Added log_selector = +pid.
3006 PH/15 Flush SMTP output before delaying, unless control=no_delay_flush is set.
3008 PH/16 Add ${if forany and ${if forall.
3010 PH/17 Added dsn_from option to vary the From: line in DSNs.
3012 PH/18 Flush SMTP output before performing a callout, unless control =
3013 no_callout_flush is set.
3015 PH/19 Change 4.64/PH/36 introduced a bug: when address_retry_include_sender
3016 was true (the default) a successful delivery failed to delete the retry
3017 item, thus causing premature timeout of the address. The bug is now
3020 PH/20 Added hosts_avoid_pipelining to the smtp transport.
3022 PH/21 Long custom messages for fakedefer and fakereject are now split up
3023 into multiline responses in the same way that messages for "deny" and
3024 other ACL rejections are.
3026 PH/22 Applied Jori Hamalainen's speed-up changes and typo fixes to exigrep,
3027 with slight modification.
3029 PH/23 Applied sieve patches from the maintainer "tracking the latest notify
3030 draft, changing the syntax and factoring some duplicate code".
3032 PH/24 When the log selector "outgoing_port" was set, the port was shown as -1
3033 for deliveries of the second and subsequent messages over the same SMTP
3036 PH/25 Applied Magnus Holmgren's patch for ${addresses, ${map, ${filter, and
3037 ${reduce, with only minor "tidies".
3039 SC/02 Applied Daniel Tiefnig's patch to improve the '($parent) =' pattern match.
3041 PH/26 Added a "continue" ACL modifier that does nothing, for the benefit of its
3042 expansion side effects.
3044 PH/27 When a message times out after an over-quota error from an Exim-imposed
3045 quota, the bounce message says "mailbox is full". This message was not
3046 being given when it was a system quota that was exceeded. It now should
3049 MH/03 Made $recipients available in local_scan(). local_scan() already has
3050 better access to the recipient list through recipients_list[], but
3051 $recipients can be useful in postmaster-provided expansion strings.
3053 PH/28 The $smtp_command and $smtp_command_argument variables were not correct
3054 in the case of a MAIL command with additional options following the
3055 address, for example: MAIL FROM:<foo@bar> SIZE=1234. The option settings
3056 were accidentally chopped off.
3058 PH/29 SMTP synchronization checks are implemented when a command is read -
3059 there is a check that no more input is waiting when there shouldn't be
3060 any. However, for some commands, a delay in an ACL can mean that it is
3061 some time before the response is written. In this time, more input might
3062 arrive, invalidly. So now there are extra checks after an ACL has run for
3063 HELO/EHLO and after the predata ACL, and likewise for MAIL and RCPT when
3064 pipelining has not been advertised.
3066 PH/30 MH's patch to allow iscntrl() characters to be list separators.
3068 PH/31 Unlike :fail:, a custom message specified with :defer: was not being
3069 returned in the SMTP response when smtp_return_error_details was false.
3070 This has been fixed.
3072 PH/32 Change the Dovecot authenticator to use read() and write() on the socket
3073 instead of the C I/O that was originally supplied, because problems were
3074 reported on Solaris.
3076 PH/33 Compile failed with OpenSSL 0.9.8e. This was due to a coding error in
3077 Exim which did not show up earlier: it was assuming that a call to
3078 SSL_CTX_set_info_callback() might give an error value. In fact, there is
3079 no error. In previous releases of OpenSSL, SSL_CTX_set_info_callback()
3080 was a macro that became an assignment, so it seemed to work. This has
3081 changed to a proper function call with a void return, hence the compile
3082 error. Exim's code has been fixed.
3084 PH/34 Change HDA_SIZE in oracle.c from 256 to 512. This is needed for 64-bit
3087 PH/35 Applied a patch from the Sieve maintainer which fixes a bug in "notify".
3089 PH/36 Applied John Jetmore's patch to add -v functionality to exigrep.
3091 PH/37 If a message is not accepted after it has had an id assigned (e.g.
3092 because it turns out to be too big or there is a timeout) there is no
3093 "Completed" line in the log. When some messages of this type were
3094 selected by exigrep, they were listed as "not completed". Others were
3095 picked up by some special patterns. I have improved the selection
3096 criteria to be more general.
3098 PH/38 The host_find_failed option in the manualroute router can now be set
3099 to "ignore", to completely ignore a host whose IP address cannot be
3100 found. If all hosts are ignored, the behaviour is controlled by the new
3101 host_all_ignored option.
3103 PH/39 In a list of hosts for manualroute, if one item (either because of multi-
3104 homing or because of multiple MX records with /mx) generated more than
3105 one IP address, and the following item turned out to be the local host,
3106 all the secondary addresses of the first item were incorrectly removed
3107 from the list, along with the local host and any following hosts (which
3108 is what is supposed to happen).
3110 PH/40 When Exim receives a message, it writes the login name, uid, and gid of
3111 whoever called Exim into the -H file. In the case of the daemon it was
3112 behaving confusingly. When first started, it used values for whoever
3113 started the daemon, but after a SIGHUP it used the Exim user (because it
3114 calls itself on a restart). I have changed the code so that it now always
3117 PH/41 (Following a suggestion from Tony Finch) If all the RCPT commands in a
3118 message are rejected with the same error (e.g. no authentication or bad
3119 sender address), and a DATA command is nevertheless sent (as can happen
3120 with PIPELINING or a stupid MUA), the error message that was given to the
3121 RCPT commands is included in the rejection of the DATA command. This is
3122 intended to be helpful for MUAs that show only the final error to their
3125 PH/42 Another patch from the Sieve maintainer.
3127 SC/02 Eximstats - Differentiate between permanent and temporary rejects.
3128 Eximstats - Fixed some broken HTML links and added missing column headers
3130 Eximstats - Fixed Grand Total Summary Domains, Edomains, and Email
3131 columns for Rejects, Temp Rejects, Ham, and Spam rows.
3133 SC/03 Eximstats - V1.58 Fix to get <> and blackhole to show in edomain tables.
3135 PH/43 Yet another patch from the Sieve maintainer.
3137 PH/44 I found a way to check for a TCP/IP connection going away before sending
3138 the response to the final '.' that terminates a message, but only in the
3139 case where the client has not sent further data following the '.'
3140 (unfortunately, this is allowed). However, in many cases there won't be
3141 any further data because there won't be any more messages to send. A call
3142 to select() can be used: if it shows that the input is "ready", there is
3143 either input waiting, or the socket has been closed. An attempt to read
3144 the next input character can distinguish the two cases. Previously, Exim
3145 would have sent an OK response which the client would never have see.
3146 This could lead to message repetition. This fix should cure that, at
3147 least in a lot of common cases.
3149 PH/45 Do not advertise STARTTLS in response to HELP unless it would be
3150 advertised in response to EHLO.
3156 PH/01 Two more bugs that were introduced by 4.64/PH/07, in addition to the one
3157 fixed by 4.65/MH/01 (is this a record?) are fixed:
3159 (i) An empty string was always treated as zero by the numeric comparison
3160 operators. This behaviour has been restored.
3162 (ii) It is documented that the numeric comparison operators always treat
3163 their arguments as decimal numbers. This was broken in that numbers
3164 starting with 0 were being interpreted as octal.
3166 While fixing these problems I realized that there was another issue that
3167 hadn't been noticed. Values of message_size_limit (both the global option
3168 and the transport option) were treated as octal if they started with 0.
3169 The documentation was vague. These values are now always treated as
3170 decimal, and I will make that clear in the documentation.
3176 TK/01 Disable default definition of HAVE_LINUX_SENDFILE. Clashes with
3177 Linux large file support (_FILE_OFFSET_BITS=64) on older glibc
3180 MH/01 Don't check that the operands of numeric comparison operators are
3181 integers when their expansion is in "skipping" mode (fixes bug
3182 introduced by 4.64-PH/07).
3184 PH/01 If a system filter or a router generates more than SHRT_MAX (32767)
3185 child addresses, Exim now panics and dies. Previously, because the count
3186 is held in a short int, deliveries were likely to be lost. As such a
3187 large number of recipients for a single message is ridiculous
3188 (performance will be very, very poor), I have chosen to impose a limit
3189 rather than extend the field.
3195 TK/01 Bugzilla #401. Fix DK spooling code so that it can overwrite a
3196 leftover -K file (the existence of which was triggered by #402).
3197 While we were at it, introduced process PID as part of the -K
3198 filename. This should rule out race conditions when creating
3201 TK/02 Bugzilla #402. Apply patch from Simon Arlott, speeding up DK signing
3202 processing considerably. Previous code took too long for large mails,
3203 triggering a timeout which in turn triggers #401.
3205 TK/03 Introduced HAVE_LINUX_SENDFILE to os.h-Linux. Currently only used
3206 in the DK code in transports.c. sendfile() is not really portable,
3207 hence the _LINUX specificness.
3209 TF/01 In the add_headers option to the mail command in an Exim filter,
3210 there was a bug that Exim would claim a syntax error in any
3211 header after the first one which had an odd number of characters
3214 PH/01 If a server that rejects MAIL FROM:<> was the target of a sender
3215 callout verification, Exim cached a "reject" for the entire domain. This
3216 is correct for most verifications, but it is not correct for a recipient
3217 verification with use_sender or use_postmaster set, because in that case
3218 the callout does not use MAIL FROM:<>. Exim now distinguishes the special
3219 case of MAIL FROM:<> rejection from other early rejections (e.g.
3220 rejection of HELO). When verifying a recipient using a non-null MAIL
3221 address, the cache is ignored if it shows MAIL FROM:<> rejection.
3222 Whatever the result of the callout, the value of the domain cache is
3223 left unchanged (for any other kind of callout, getting as far as trying
3224 RCPT means that the domain itself is ok).
3226 PH/02 Tidied a number of unused variable and signed/unsigned warnings that
3229 PH/03 On Solaris, an unexpectedly close socket (dropped connection) can
3230 manifest itself as EPIPE rather than ECONNECT. When tidying away a
3231 session, the daemon ignores ECONNECT errors and logs others; it now
3232 ignores EPIPE as well.
3234 PH/04 Applied Nico Erfurth's refactoring patch to tidy up mime.c
3235 (quoted-printable decoding).
3237 PH/05 Applied Nico Erfurth's refactoring patch to tidy up spool_mbox.c, and
3238 later the small subsequent patch to fix an introduced bug.
3240 PH/06 Installed the latest Cygwin Makefile from the Cygwin maintainer.
3242 PH/07 There was no check for overflow in expansions such as ${if >{1}{4096M}}.
3244 PH/08 An error is now given if message_size_limit is specified negative.
3246 PH/09 Applied and tidied up Jakob Hirsch's patch for allowing ACL variables
3247 to be given (somewhat) arbitrary names.
3249 JJ/01 exipick 20060919.0, allow for arbitrary acl_ variables introduced
3252 JJ/02 exipick 20060919.0, --show-vars args can now be regular expressions,
3253 miscellaneous code fixes
3255 PH/10 Added the log_reject_target ACL modifier to specify where to log
3258 PH/11 Callouts were setting the name used for EHLO/HELO from $smtp_active_
3259 hostname. This is wrong, because it relates to the incoming message (and
3260 probably the interface on which it is arriving) and not to the outgoing
3261 callout (which could be using a different interface). This has been
3262 changed to use the value of the helo_data option from the smtp transport
3263 instead - this is what is used when a message is actually being sent. If
3264 there is no remote transport (possible with a router that sets up host
3265 addresses), $smtp_active_hostname is used.
3267 PH/12 Installed Andrey Panin's patch to add a dovecot authenticator. Various
3268 tweaks were necessary in order to get it to work (see also 21 below):
3269 (a) The code assumed that strncpy() returns a negative number on buffer
3270 overflow, which isn't the case. Replaced with Exim's string_format()
3272 (b) There were several signed/unsigned issues. I just did the minimum
3273 hacking in of casts. There is scope for a larger refactoring.
3274 (c) The code used strcasecmp() which is not a standard C function.
3275 Replaced with Exim's strcmpic() function.
3276 (d) The code set only $1; it now sets $auth1 as well.
3277 (e) A simple test gave the error "authentication client didn't specify
3278 service in request". It would seem that Dovecot has changed its
3279 interface. Fortunately there's a specification; I followed it and
3280 changed what the client sends and it appears to be working now.
3282 PH/13 Added $message_headers_raw to provide the headers without RFC 2047
3285 PH/14 Corrected misleading output from -bv when -v was also used. Suppose the
3286 address A is aliased to B and C, where B exists and C does not. Without
3287 -v the output is "A verified" because verification stops after a
3288 successful redirection if more than one address is generated. However,
3289 with -v the child addresses are also verified. Exim was outputting "A
3290 failed to verify" and then showing the successful verification for C,
3291 with its parentage. It now outputs "B failed to verify", showing B's
3292 parentage before showing the successful verification of C.
3294 PH/15 Applied Michael Deutschmann's patch to allow DNS black list processing to
3295 look up a TXT record in a specific list after matching in a combined
3298 PH/16 It seems that the options setting for the resolver (RES_DEFNAMES and
3299 RES_DNSRCH) can affect the behaviour of gethostbyname() and friends when
3300 they consult the DNS. I had assumed they would set it the way they
3301 wanted; and indeed my experiments on Linux seem to show that in some
3302 cases they do (I could influence IPv6 lookups but not IPv4 lookups).
3303 To be on the safe side, however, I have now made the interface to
3304 host_find_byname() similar to host_find_bydns(), with an argument
3305 containing the DNS resolver options. The host_find_byname() function now
3306 sets these options at its start, just as host_find_bydns() does. The smtp
3307 transport options dns_qualify_single and dns_search_parents are passed to
3308 host_find_byname() when gethostbyname=TRUE in this transport. Other uses
3309 of host_find_byname() use the default settings of RES_DEFNAMES
3310 (qualify_single) but not RES_DNSRCH (search_parents).
3312 PH/17 Applied (a modified version of) Nico Erfurth's patch to make
3313 spool_read_header() do less string testing, by means of a preliminary
3314 switch on the second character of optional "-foo" lines. (This is
3315 overdue, caused by the large number of possibilities that now exist.
3316 Originally there were few.) While I was there, I also converted the
3317 str(n)cmp tests so they don't re-test the leading "-" and the first
3318 character, in the hope this might squeeze out yet more improvement.
3320 PH/18 Two problems with "group" syntax in header lines when verifying: (1) The
3321 flag allowing group syntax was set by the header_syntax check but not
3322 turned off, possible causing trouble later; (2) The flag was not being
3323 set at all for the header_verify test, causing "group"-style headers to
3324 be rejected. I have now set it in this case, and also caused header_
3325 verify to ignore an empty address taken from a group. While doing this, I
3326 came across some other cases where the code for allowing group syntax
3327 while scanning a header line wasn't quite right (mostly, not resetting
3328 the flag correctly in the right place). These bugs could have caused
3329 trouble for malformed header lines. I hope it is now all correct.
3331 PH/19 The functions {pwcheck,saslauthd}_verify_password() are always called
3332 with the "reply" argument non-NULL. The code, however (which originally
3333 came from elsewhere) had *some* tests for NULL when it wrote to *reply,
3334 but it didn't always do it. This confused somebody who was copying the
3335 code for some other use. I have removed all the tests.
3337 PH/20 It was discovered that the GnuTLS code had support for RSA_EXPORT, a
3338 feature that was used to support insecure browsers during the U.S. crypto
3339 embargo. It requires special client support, and Exim is probably the
3340 only MTA that supported it -- and would never use it because real RSA is
3341 always available. This code has been removed, because it had the bad
3342 effect of slowing Exim down by computing (never used) parameters for the
3343 RSA_EXPORT functionality.
3345 PH/21 On the advice of Timo Sirainen, added a check to the dovecot
3346 authenticator to fail if there's a tab character in the incoming data
3347 (there should never be unless someone is messing about, as it's supposed
3348 to be base64-encoded). Also added, on Timo's advice, the "secured" option
3349 if the connection is using TLS or if the remote IP is the same as the
3350 local IP, and the "valid-client-cert option" if a client certificate has
3353 PH/22 As suggested by Dennis Davis, added a server_condition option to *all*
3354 authenticators. This can be used for authorization after authentication
3355 succeeds. (In the case of plaintext, it servers for both authentication
3358 PH/23 Testing for tls_required and lost_connection in a retry rule didn't work
3359 if any retry times were supplied.
3361 PH/24 Exim crashed if verify=helo was activated during an incoming -bs
3362 connection, where there is no client IP address to check. In this
3363 situation, the verify now always succeeds.
3365 PH/25 Applied John Jetmore's -Mset patch.
3367 PH/26 Added -bem to be like -Mset, but loading a message from a file.
3369 PH/27 In a string expansion for a processed (not raw) header when multiple
3370 headers of the same name were present, leading whitespace was being
3371 removed from all of them, but trailing whitespace was being removed only
3372 from the last one. Now trailing whitespace is removed from each header
3373 before concatenation. Completely empty headers in a concatenation (as
3374 before) are ignored.
3376 PH/28 Fixed bug in backwards-compatibility feature of PH/09 (thanks to John
3377 Jetmore). It would have mis-read ACL variables from pre-4.61 spool files.
3379 PH/29 [Removed. This was a change that I later backed out, and forgot to
3380 correct the ChangeLog entry (that I had efficiently created) before
3381 committing the later change.]
3383 PH/30 Exim was sometimes attempting to deliver messages that had suffered
3384 address errors (4xx response to RCPT) over the same connection as other
3385 messages routed to the same hosts. Such deliveries are always "forced",
3386 so retry times are not inspected. This resulted in far too many retries
3387 for the affected addresses. The effect occurred only when there were more
3388 hosts than the hosts_max_try setting in the smtp transport when it had
3389 the 4xx errors. Those hosts that it had tried were not added to the list
3390 of hosts for which the message was waiting, so if all were tried, there
3391 was no problem. Two fixes have been applied:
3393 (i) If there are any address or message errors in an SMTP delivery, none
3394 of the hosts (tried or untried) are now added to the list of hosts
3395 for which the message is waiting, so the message should not be a
3396 candidate for sending over the same connection that was used for a
3397 successful delivery of some other message. This seems entirely
3398 reasonable: after all the message is NOT "waiting for some host".
3399 This is so "obvious" that I'm not sure why it wasn't done
3400 previously. Hope I haven't missed anything, but it can't do any
3401 harm, as the worst effect is to miss an optimization.
3403 (ii) If, despite (i), such a delivery is accidentally attempted, the
3404 routing retry time is respected, so at least it doesn't keep
3405 hammering the server.
3407 PH/31 Installed Andrew Findlay's patch to close the writing end of the socket
3408 in ${readsocket because some servers need this prod.
3410 PH/32 Added some extra debug output when updating a wait-xxx database.
3412 PH/33 The hint "could be header name not terminated by colon", which has been
3413 given for certain expansion errors for a long time, was not being given
3414 for the ${if def:h_colon_omitted{... case.
3416 PH/34 The spec says: "With one important exception, whenever a domain list is
3417 being scanned, $domain contains the subject domain." There was at least
3418 one case where this was not true.
3420 PH/35 The error "getsockname() failed: connection reset by peer" was being
3421 written to the panic log as well as the main log, but it isn't really
3422 panic-worthy as it just means the connection died rather early on. I have
3423 removed the panic log writing for the ECONNRESET error when getsockname()
3426 PH/36 After a 4xx response to a RCPT error, that address was delayed (in queue
3427 runs only) independently of the message's sender address. This meant
3428 that, if the 4xx error was in fact related to the sender, a different
3429 message to the same recipient with a different sender could confuse
3430 things. In particular, this can happen when sending to a greylisting
3431 server, but other circumstances could also provoke similar problems.
3432 I have changed the default so that the retry time for these errors is now
3433 based a combination of the sender and recipient addresses. This change
3434 can be overridden by setting address_retry_include_sender=false in the
3437 PH/37 For LMTP over TCP/IP (the smtp transport), error responses from the
3438 remote server are returned as part of bounce messages. This was not
3439 happening for LMTP over a pipe (the lmtp transport), but now it is the
3440 same for both kinds of LMTP.
3442 PH/38 Despite being documented as not happening, Exim was rewriting addresses
3443 in header lines that were in fact CNAMEs. This is no longer the case.
3445 PH/39 If -R or -S was given with -q<time>, the effect of -R or -S was ignored,
3446 and queue runs started by the daemon processed all messages. This has
3447 been fixed so that -R and -S can now usefully be given with -q<time>.
3449 PH/40 Import PCRE release 6.7 (fixes some bugs).
3451 PH/41 Add bitwise logical operations to eval (courtesy Brad Jorsch).
3453 PH/42 Give an error if -q is specified more than once.
3455 PH/43 Renamed the variables $interface_address and $interface_port as
3456 $received_ip_address and $received_port, to make it clear that these
3457 values apply to message reception, and not to the outgoing interface when
3458 a message is delivered. (The old names remain recognized, of course.)
3460 PH/44 There was no timeout on the connect() call when using a Unix domain
3461 socket in the ${readsocket expansion. There now is.
3463 PH/45 Applied a modified version of Brad Jorsch's patch to allow "message" to
3464 be meaningful with "accept".
3466 SC/01 Eximstats V1.43
3467 Bug fix for V1.42 with -h0 specified. Spotted by Chris Lear.
3469 SC/02 Eximstats V1.44
3470 Use a glob alias rather than an array ref in the generated
3471 parser. This improves both readability and performance.
3473 SC/03 Eximstats V1.45 (Marco Gaiarin / Steve Campbell)
3474 Collect SpamAssassin and rejection statistics.
3475 Don't display local sender or destination tables unless
3476 there is data to show.
3477 Added average volumes into the top table text output.
3479 SC/04 Eximstats V1.46
3480 Collect data on the number of addresses (recipients)
3481 as well as the number of messages.
3483 SC/05 Eximstats V1.47
3484 Added 'Message too big' to the list of mail rejection
3485 reasons (thanks to Marco Gaiarin).
3487 SC/06 Eximstats V1.48
3488 Mainlog lines which have GMT offsets and are too short to
3489 have a flag are now skipped.
3491 SC/07 Eximstats V1.49 (Alain Williams)
3492 Added the -emptyok flag.
3494 SC/08 Eximstats V1.50
3495 Fixes for obtaining the IP address from reject messages.
3497 JJ/03 exipick.20061117.2, made header handling as similar to exim as possible
3498 (added [br]h_ prefixes, implemented RFC2047 decoding. Fixed
3499 whitespace changes from 4.64-PH/27
3501 JJ/04 exipick.20061117.2, fixed format and added $message_headers_raw to
3504 JJ/05 exipick.20061117.2, bug fixes (error out sooner when invalid criteria
3505 are found, allow negative numbers in numeric criteria)
3507 JJ/06 exipick.20061117.2, added new $message_body_missing variable
3509 JJ/07 exipick.20061117.2, added $received_ip_address and $received_port
3510 to match changes made in 4.64-PH/43
3512 PH/46 Applied Jori Hamalainen's patch to add features to exiqsumm.
3514 PH/47 Put in an explicit test for a DNS lookup of an address record where the
3515 "domain" is actually an IP address, and force a failure. This locks out
3516 those revolvers/nameservers that support "A-for-A" lookups, in
3517 contravention of the specifications.
3519 PH/48 When a host name was looked up from an IP address, and the subsequent
3520 forward lookup of the name timed out, the host name was left in
3521 $sender_host_name, contrary to the specification.
3523 PH/49 Although default lookup types such as lsearch* or cdb*@ have always been
3524 restricted to single-key lookups, Exim was not diagnosing an error if
3525 * or *@ was used with a query-style lookup.
3527 PH/50 Increased the value of DH_BITS in tls-gnu.c from 768 to 1024.
3529 MH/01 local_scan ABI version incremented to 1.1. It should have been updated
3530 long ago, but noone interested enough thought of it. Let's just say that
3531 the "1.1" means that there are some new functions that weren't there at
3532 some point in the past.
3534 PH/51 Error processing for expansion failure of helo_data from an smtp
3535 transport during callout processing was broken.
3537 PH/52 Applied John Jetmore's patch to allow tls-on-connect and STARTTLS to be
3538 tested/used via the -bh/-bhc/-bs options.
3540 PH/53 Added missing "#include <time.h>" to pcre/pcretest.c (this was a PCRE
3541 bug, fixed in subsequent PCRE releases).
3543 PH/54 Applied Robert Bannocks' patch to avoid a problem with references that
3544 arises when using the Solaris LDAP libraries (but not with OpenLDAP).
3546 PH/55 Check for a ridiculously long file name in exim_dbmbuild.
3552 SC/01 Use a glob alias rather than an array ref in eximstats generated
3553 parser. This improves both readability and performance.
3555 SC/02 Collect SpamAssassin and rejection statistics in eximstats.
3556 Don't display local sender or destination tables in eximstats unless
3557 there is data to show.
3558 Added average volumes into the eximstats top table text output.
3560 SC/03 Collect data on the number of addresses (recipients) as well
3561 as the number of messages in eximstats.
3563 TF/01 Correct an error in the documentation for the redirect router. Exim
3564 does (usually) call initgroups() when daemonizing.
3566 TF/02 Call initgroups() when dropping privilege in exim.c, so that Exim runs
3567 with consistent privilege compared to when running as a daemon.
3569 TF/03 Note in the spec that $authenticated_id is not set for local
3570 submissions from trusted users.
3572 TF/04 The ratelimit per_rcpt option now works correctly in acl_not_smtp.
3573 Thanks to Dean Brooks <dean@iglou.com> for the patch.
3575 TF/05 Make it easier to get SMTP authentication and TLS/SSL support working
3576 by adding some example configuration directives to the default
3577 configuration file. A little bit of work is required to uncomment the
3578 directives and define how usernames and passwords are checked, but
3579 there is now a framework to start from.
3581 PH/01 Added #define LDAP_DEPRECATED 1 to ldap.c because some of the "old"
3582 functions that Exim currently uses aren't defined in ldap.h for OpenLDAP
3583 without this. I don't know how relevant this is to other LDAP libraries.
3585 PH/02 Add the verb name to the "unknown ACL verb" error.
3587 PH/03 Magnus Holmgren's patch for filter_prepend_home.
3589 PH/03 Fixed Bugzilla #101: macro definition between ACLs doesn't work.
3591 PH/04 Applied Magnus Holmgren's patch to fix Bugzilla #98: transport's home
3592 directory not expanded when it should be if an expanded home directory
3593 was set for the address (which is overridden by the transport).
3595 PH/05 Applied Alex Kiernan's patch to fix Bugzilla #99: a problem with
3598 PH/06 Added acl_not_smtp_start, based on Johannes Berg's patch, and set the
3599 bit to forbid control=suppress_local_fixups in the acl_not_smtp ACL,
3600 because it is too late at that time, and has no effect.
3602 PH/07 Changed ${quote_pgsql to quote ' as '' instead of \' because of a
3603 security issue with \' (bugzilla #107). I could not use the
3604 PQescapeStringConn() function, because it needs a PGconn value as one of
3607 PH/08 When testing addresses using -bt, indicate those final addresses that
3608 are duplicates that would not cause an additional delivery. At least one
3609 person was confused, thinking that -bt output corresponded to deliveries.
3610 (Suppressing duplicates isn't a good idea as you lose the information
3611 about possibly different redirections that led to the duplicates.)
3613 PH/09 Applied patch from Erik to use select() instead of poll() in spam.c on
3614 systems where poll() doesn't work, in particular OS X.
3616 PH/10 Added more information to debugging output for retry time not reached.
3618 PH/11 Applied patch from Arkadiusz Miskiewicz to apply a timeout to read
3619 operations in malware.c.
3621 PH/12 Applied patch from Magnus Holmgren to include the "h" tag in Domain Keys
3624 PH/13 If write_rejectlog was set false when logging was sent to syslog with
3625 syslog_duplication set false, log lines that would normally be written
3626 both the the main log and to the reject log were not written to syslog at
3629 PH/14 In the default configuration, change the use of "message" in ACL warn
3630 statements to "add_header".
3632 PH/15 Diagnose a filter syntax error for "seen", "unseen", or "noerror" if not
3633 not followed by a command (e.g. "seen endif").
3635 PH/16 Recognize SMTP codes at the start of "message" in ACLs and after :fail:
3636 and :defer: in a redirect router. Add forbid_smtp_code to suppress the
3639 PH/17 Added extra conditions to the default value of delay_warning_condition
3643 { !eq{$h_list-id:$h_list-post:$h_list-subscribe:}{} } \
3644 { match{$h_precedence:}{(?i)bulk|list|junk} } \
3645 { match{$h_auto-submitted:}{(?i)auto-generated|auto-replied} } \
3648 The Auto-Submitted: and various List- headers are standardised, whereas I
3649 don't think Precedence: ever was.
3651 PH/18 Refactored debugging code in route_finduser() to show more information,
3652 in particular, the error code if getpwnam() issues one.
3654 PH/19 Added PQsetClientEncoding(conn, "SQL_ASCII") to the pgsql code module.
3655 This is apparently needed in addition to the PH/07 change above to avoid
3656 any possible encoding problems.
3658 PH/20 Perl can change the locale. Exim was resetting it after a ${perl call,
3659 but not after initializing Perl.
3661 PH/21 Added a call to PQsetNoticeProcessor() to catch pgsql "notices" and
3662 output them only if debugging. By default they are written stderr,
3663 apparently, which is not desirable.
3665 PH/22 Added Alain Williams' LDAP patch to support setting REFERRALS=off on
3668 JJ/01 exipick: added --reverse (and -R synonym), --random, --size, --sort and
3671 JJ/02 exipick: rewrote --help documentation to hopefully make more clear.
3673 PH/23 Made -oMaa and -oMt work with -bh and -bs to pretend the connection is
3674 authenticated or an ident call has been made. Suppress the default
3675 values for $authenticated_id and $authenticated_sender (but permit -oMai
3676 and -oMas) when testing with -bh.
3678 PH/24 Re-jigged the order of the tests in the default configuration so that the
3679 tests for valid domains and recipients precede the DNS black list and CSA
3680 tests, on the grounds that those ones are more expensive.
3682 PH/25 Exim was not testing for a space following SMTP commands such as EHLO
3683 that require one. Thus, EHLORHUBARB was interpreted as a valid command.
3684 This bug exists in every version of Exim that I still have, right back to
3687 PH/26 (n)wildlsearch lookups are documented as being done case-insensitively.
3688 However, an attempt to turn on case-sensitivity in a regex key by
3689 including (?-i) didn't work because the subject string was already
3690 lowercased, and the effects were non-intuitive. It turns out that a
3691 one-line patch can be used to allow (?-i) to work as expected.
3697 TF/01 Fix the add_header change below (4.61 PH/55) which had a bug that (amongst
3698 other effects) broke the use of negated acl sub-conditions.
3700 PH/01 ${readsocket now supports Internet domain sockets (modified John Jetmore
3703 PH/02 When tcp-wrappers is called from Exim, it returns only "deny" or "allow".
3704 "Deny" causes Exim to reject the incoming connection with a 554 error.
3705 Unfortunately, if there is a major crisis, such as a disk failure,
3706 tcp-wrappers gives "deny", whereas what one would like would be some
3707 kind of temporary error. A kludge has been added to help with this.
3708 Before calling hosts_ctl(), errno is set zero. If the result is "deny", a
3709 554 error is used if errno is still zero or contains ENOENT (which occurs
3710 if either of the /etc/hosts.{allow,deny} files is missing). Otherwise, a
3713 PH/03 Add -lutil to the default FreeBSD LIBS setting.
3715 PH/04 Change PH/19 for 4.61 was too wide. It should not be applied to host
3716 errors. Otherwise a message that provokes a temporary error (when other
3717 messages do not) can cause a whole host to time out.
3719 PH/05 Batch deliveries by appendfile and pipe transports did not work when the
3720 addresses were routed directly to files or pipes from a redirect router.
3721 File deliveries just didn't batch; pipe deliveries might have suffered
3724 PH/06 A failure to get a lock for a hints database would erroneously always say
3725 "Failed to get write lock", even when it was really a read lock.
3727 PH/07 The appendfile transport was creating MBX lock files with a fixed mode
3728 of 0600. This has been changed to use the value of the lockfile_mode
3729 option (which defaults to 0600).
3731 PH/08 Applied small patch from the Sieve maintainer.
3733 PH/09 If maildir_quota_directory_regex was set to exclude (say) the .Trash
3734 folder from quota calculations, a direct delivery into this folder messed
3735 up the contents of the maildirsize file. This was because the regex was
3736 used only to exclude .Trash (or whatever) when the size of the mailbox
3737 was calculated. There was no check that a delivery was happening into an
3738 excluded directory. This bug has been fixed by ignoring all quota
3739 processing for deliveries into excluded directories.
3741 PH/10 Added the maildirfolder_create_regex option to appendfile.
3747 PH/01 The code for finding all the local interface addresses on a FreeBSD
3748 system running IPv6 was broken. This may well have applied to all BSD
3749 systems, as well as to others that have similar system calls. The broken
3750 code found IPv4 interfaces correctly, but gave incorrect values for the
3751 IPv6 interfaces. In particular, ::1 was not found. The effect in Exim was
3752 that it would not match correctly against @[] and not recognize the IPv6
3755 PH/02 The ipliteral router was not recognizing addresses of the form user@
3756 [ipv6:....] because it didn't know about the "ipv6:" prefix.
3758 PH/03 Added disable_ipv6.
3760 PH/04 Changed $reply_address to use the raw form of the headers instead of the
3761 decoded form, because it is most often used to construct To: headers
3762 lines in autoreplies, and the decoded form may well be syntactically
3763 invalid. However, $reply_address has leading white space removed, and all
3764 newlines turned into spaces so that the autoreply transport does not
3767 PH/05 If group was specified without a user on a router, and no group or user
3768 was specified on a transport, the group from the router was ignored.
3770 PH/06 Increased the number of ACL variables to 20 of each type, and arranged
3771 for visible compile-time settings that can be used to change these
3772 numbers, for those that want even more. Backwards compatibility with old
3773 spool files has been maintained. However, going back to a previous Exim
3774 release will lost any variables that are in spool files.
3776 PH/07 Two small changes when running in the test harness: increase delay when
3777 passing a TCP/IP connection to a new process, in case the original
3778 process has to generate a bounce, and remove special handling of
3779 127.0.0.2 (sic), which is no longer necessary.
3781 PH/08 Changed debug output of dbfn_open() flags from numbers to names, so as to
3782 be the same on different OS.
3784 PH/09 Moved a debug statement in filter processing to avoid a race problem when
3787 JJ/01 exipick: fixed bug where -b (brief) output option showed "Vars:"
3788 whether --show-vars was specified or not
3790 JJ/02 exipick: Added support for new ACL variable spool format introduced
3793 PH/10 Fixed another bug related to PH/04 above: if an incoming message had a
3794 syntactically invalid From: or Reply-to: line, and a filter used this to
3795 generate an autoreply, and therefore failed to obtain an address for the
3796 autoreply, Exim could try to deliver to a non-existent relative file
3797 name, causing unrelated and misleading errors. What now happens is that
3798 it logs this as a hard delivery error, but does not attempt to create a
3801 PH/11 The exinext utility has a -C option for testing purposes, but although
3802 the given file was scanned by exinext itself; it wasn't being passed on
3803 when Exim was called.
3805 PH/12 In the smtp transport, treat an explicit ECONNRESET error the same as
3806 an end-of-file indication when reading a command response.
3808 PH/13 Domain literals for IPv6 were not recognized unless IPv6 support was
3809 compiled. In many other places in Exim, IPv6 addresses are always
3810 recognized, so I have changed this. It also means that IPv4 domain
3811 literals of the form [IPV4:n.n.n.n] are now always recognized.
3813 PH/14 When a uid/gid is specified for the queryprogram router, it cannot be
3814 used if the router is not running as root, for example, when verifying at
3815 ACL time, or when using -bh. The debugging output from this situation was
3816 non-existent - all you got was a failure to exec. I have made two
3819 (a) Failures to set uid/gid, the current directory, or a process leader
3820 in a subprocess such as that created by queryprogram now generate
3821 suitable debugging output when -d is set.
3823 (b) The queryprogram router detects when it is not running as root,
3824 outputs suitable debugging information if -d is set, and then runs
3825 the subprocess without attempting to change uid/gid.
3827 PH/15 Minor change to Makefile for building test_host (undocumented testing
3830 PH/16 As discussed on the list in Nov/Dec: Exim no longer looks at the
3831 additional section of a DNS packet that returns MX or SRV records.
3832 Instead, it always explicitly searches for A/AAAA records. This avoids
3833 major problems that occur when a DNS server includes only records of one
3834 type (A or AAAA) in an MX/SRV packet. A byproduct of this change has
3835 fixed another bug: if SRV records were looked up and the corresponding
3836 address records were *not* found in the additional section, the port
3837 values from the SRV records were lost.
3839 PH/17 If a delivery to a pipe, file, or autoreply was deferred, Exim was not
3840 using the correct key (the original address) when searching the retry
3841 rules in order to find which one to use for generating the retry hint.
3843 PH/18 If quota_warn_message contains a From: header, Exim now refrains from
3844 adding the default one. Similarly, if it contains a Reply-To: header, the
3845 errors_reply_to option, if set, is not used.
3847 PH/19 When calculating a retry time, Exim used to measure the "time since
3848 failure" by looking at the "first failed" field in the retry record. Now
3849 it does not use this if it is later than than the arrival time of the
3850 message. Instead it uses the arrival time. This makes for better
3851 behaviour in cases where some deliveries succeed, thus re-setting the
3852 "first failed" field. An example is a quota failure for a huge message
3853 when small messages continue to be delivered. Without this change, the
3854 "time since failure" will always be short, possible causing more frequent
3855 delivery attempts for the huge message than are intended.
3856 [Note: This change was subsequently modified - see PH/04 for 4.62.]
3858 PH/20 Added $auth1, $auth2, $auth3 to contain authentication data (as well as
3859 $1, $2, $3) because the numerical variables can be reset during some
3860 expansion items (e.g. "match"), thereby losing the authentication data.
3862 PH/21 Make -bV show the size of off_t variables so that the test suite can
3863 decide whether to run tests for quotas > 2G.
3865 PH/22 Test the values given for quota, quota_filecount, quota_warn_threshold,
3866 mailbox_size, and mailbox_filecount in the appendfile transport. If a
3867 filecount value is greater than 2G or if a quota value is greater than 2G
3868 on a system where the size of off_t is not greater than 4, a panic error
3871 PH/23 When a malformed item such as 1.2.3/24 appears in a host list, it can
3872 never match. The debug and -bh output now contains an explicit error
3873 message indicating a malformed IPv4 address or mask.
3875 PH/24 An host item such as 1.2.3.4/abc was being treated as the IP address
3876 1.2.3.4 without a mask. Now it is not recognized as an IP address, and
3877 PH/23 above applies.
3879 PH/25 Do not write to syslog when running in the test harness. The only
3880 occasion when this arises is a failure to open the main or panic logs
3881 (for which there is an explicit test).
3883 PH/26 Added the /no_tell option to "control=freeze".
3885 PH/27 If a host name lookup failed very early in a connection, for example, if
3886 the IP address matched host_lookup and the reverse lookup yielded a name
3887 that did not have a forward lookup, an error message of the form "no IP
3888 address found for host xxx.xxx.xxx (during SMTP connection from NULL)"
3889 could be logged. Now it outputs the IP address instead of "NULL".
3891 PH/28 An enabling patch from MH: add new function child_open_exim2() which
3892 allows the sender and the authenticated sender to be set when
3893 submitting a message from within Exim. Since child_open_exim() is
3894 documented for local_scan(), the new function should be too.
3896 PH/29 In GnuTLS, a forced expansion failure for tls_privatekey was not being
3897 ignored. In both GnuTLS and OpenSSL, an expansion of tls_privatekey that
3898 results in an empty string is now treated as unset.
3900 PH/30 Fix eximon buffer overflow bug (Bugzilla #73).
3902 PH/31 Added sender_verify_fail logging option.
3904 PH/32 In November 2003, the code in Exim that added an empty Bcc: header when
3905 needed by RFC 822 but not by RFC 2822 was commented out. I have now
3906 tidied the source and removed it altogether.
3908 PH/33 When a queue run was abandoned because the load average was too high, a
3909 log line was always written; now it is written only if the queue_run log
3910 selector is set. In addition, the log line for abandonment now contains
3911 information about the queue run such as the pid. This is always present
3912 in "start" and "stop" lines but was omitted from the "abandon" line.
3914 PH/34 Omit spaces between a header name and the colon in the error message that
3915 is given when verify = headers_syntax fails (if there are lots of them,
3916 the message gets confusing).
3918 PH/35 Change the default for dns_check_names_pattern to allow slashes within
3919 names, as there are now some PTR records that contain slashes. This check
3920 is only to protect against broken name servers that fall over on strange
3921 characters, so the fact that it applies to all lookups doesn't matter.
3923 PH/36 Now that the new test suite is complete, we can remove some of the
3924 special code in Exim that was needed for the old test suite. For example,
3925 sorting DNS records because real resolvers return them in an arbitrary
3926 order. The new test suite's fake resolver always returns records in the
3929 PH/37 When running in the test harness, use -odi for submitted messages (e.g.
3930 bounces) except when queue_only is set, to avoid logging races between
3931 the different processes.
3933 PH/38 Panic-die if .include specifies a non-absolute path.
3935 PH/39 A tweak to the "H" retry rule from its user.
3937 JJ/03 exipick: Removed parentheses from 'next' and 'last' calls that specified
3938 a label. They prevented compilation on older perls.
3940 JJ/04 exipick: Refactored code to prevent implicit split to @_ which caused
3941 a warning to be raised on newish perls.
3943 JJ/05 exipick: Fixed bug where -bpc always showed a count of all messages
3944 on queue. Changes to match documented behaviour of showing count of
3945 messages matching specified criteria.
3947 PH/40 Changed the default ident timeout from 30s to 5s.
3949 PH/41 Added support for the use of login_cap features, on those BSD systems
3950 that have them, for controlling the resources used by pipe deliveries.
3952 PH/42 The content-scanning code uses fopen() to create files in which to put
3953 message data. Previously it was not paying any attention to the mode of
3954 the files. Exim runs with umask(0) because the rest of the code creates
3955 files with open(), and sets the required mode explicitly. Thus, these
3956 files were ending up world-writeable. This was not a big issue, because,
3957 being within the spool directory, they were not world-accessible. I have
3958 created a function called modefopen, which takes an additional mode
3959 argument. It sets umask(777), creates the file, chmods it to the required
3960 mode, then resets the umask. All the relevant calls to fopen() in the
3961 content scanning code have been changed to use this function.
3963 PH/43 If retry_interval_max is set greater than 24 hours, it is quietly reset
3964 to 24 hours. This avoids potential overflow problems when processing G
3965 and H retry rules. I suspect nobody ever tinkers with this value.
3967 PH/44 Added STRIP_COMMAND=/usr/bin/strip to the FreeBSD Makefile.
3969 PH/45 When the plaintext authenticator is running as a client, the server's
3970 challenges are checked to ensure they are valid base64 strings. By
3971 default, the authentication attempt is cancelled if an invalid string is
3972 received. Setting client_ignore_invalid_base64 true ignores these errors.
3973 The decoded challenge strings are now placed in $auth1, $auth2, etc. as
3974 they are received. Thus, the responses can be made to depend on the
3975 challenges. If an invalid string is ignored, an empty string is placed in
3978 PH/46 Messages that are created by the autoreply transport now contains a
3979 References: header, in accordance with RFCs 2822 and 3834.
3981 PH/47 Added authenticated_sender_force to the smtp transport.
3983 PH/48 The ${prvs expansion was broken on systems where time_t was long long.
3985 PH/49 Installed latest patch from the Sieve maintainer.
3987 PH/50 When an Exim quota was set without a file count quota, and mailbox_size
3988 was also set, the appendfile transport was unnecessarily scanning a
3989 directory of message files (e.g. for maildir delivery) to find the count
3990 of files (along with the size), even though it did not need this
3991 information. It now does the scan only if it needs to find either the
3992 size of the count of files.
3994 PH/51 Added ${time_eval: to convert Exim time strings into seconds.
3996 PH/52 Two bugs concerned with error handling when the smtp transport is
3999 (i) Exim was not creating retry information for temporary errors given
4000 for individual recipients after the DATA command when the smtp transport
4001 was used in LMTP mode. This meant that they could be retried too
4002 frequently, and not timed out correctly.
4004 (ii) Exim was setting the flag that allows error details to be returned
4005 for LMTP errors on RCPT commands, but not for LMTP errors for individual
4006 recipients that were returned after the DATA command.
4008 PH/53 This is related to PH/52, but is more general: for any failing address,
4009 when detailed error information was permitted to be returned to the
4010 sender, but the error was temporary, then after the final timeout, only
4011 "retry timeout exceeded" was returned. Now it returns the full error as
4012 well as "retry timeout exceeded".
4014 PH/54 Added control=allow_auth_unadvertised, as it seems there are clients that
4015 do this, and (what is worse) MTAs that accept it.
4017 PH/55 Added the add_header modified to ACLs. The use of "message" with "warn"
4018 will now be deprecated.
4020 PH/56 New os.c-cygwin from the Cygwin maintainer.
4022 JJ/06 exipick: added --unsorted option to allow unsorted output in all output
4023 formats (previously only available in exim formats via -bpr, -bpru,
4024 and -bpra. Now also available in native and exiqgrep formats)
4026 JJ/07 exipick: added --freeze and --thaw options to allow faster interaction
4027 with very large, slow to parse queues
4029 JJ/08 exipick: added ! as generic prefix to negate any criteria format
4031 JJ/09 exipick: miscellaneous performance enhancements (~24% improvements)
4033 PH/57 Tidies in SMTP dialogue display in debug output: (i) It was not showing
4034 responses to authentication challenges, though it was showing the
4035 challenges; (ii) I've removed the CR characters from the debug output for
4038 PH/58 Allow for the insertion of a newline as well as a space when a string
4039 is turned into more than one encoded-word during RFC 2047 encoding. The
4040 Sieve code now uses this.
4042 PH/59 Added the following errors that can be detected in retry rules: mail_4xx,
4043 data_4xx, lost_connection, tls_required.
4045 PH/60 When a VRFY deferred or FAILED, the log message rather than the user
4046 message was being sent as an SMTP response.
4048 PH/61 Add -l and -k options to exicyclog.
4050 PH/62 When verifying, if an address was redirected to one new address, so that
4051 verification continued, and the new address failed or deferred after
4052 having set something in $address_data, the value of $address_data was not
4053 passed back to the ACL. This was different to the case when no
4054 redirection occurred. The value is now passed back in both cases.
4056 PH/63 Changed the macro HAVE_LOGIN_CAP (see PH/41 for this release above) to
4057 HAVE_SETCLASSRESOURCES because there are different APIs in use that all
4058 use login_cap.h, so on its own it isn't the distinguishing feature. The
4059 new name refers directly to the setclassresources() function.
4061 PH/65 Added configuration files for NetBSD3.
4063 PH/66 Updated OS/Makefile-HP-UX for gcc 4.1.0 with HP-UX 11.
4065 PH/67 Fixed minor infelicity in the sorting of addresses to ensure that IPv6
4066 is preferred over IPv4.
4068 PH/68 The bounce_return_message and bounce_return_body options were not being
4069 honoured for bounces generated during the reception of non-SMTP messages.
4070 In particular, this applied to messages rejected by the ACL. This bug has
4071 been fixed. However, if bounce_return_message is true and bounce_return_
4072 body is false, the headers that are returned for a non-SMTP message
4073 include only those that have been read before the error was detected.
4074 (In the case of an ACL rejection, they have all been read.)
4076 PH/69 The HTML version of the specification is now built in a directory called
4077 spec_html instead of spec.html, because the latter looks like a path with
4078 a MIME-type, and this confuses some software.
4080 PH/70 Catch two compiler warnings in sieve.c.
4082 PH/71 Fixed an obscure and subtle bug (thanks Alexander & Matthias). The
4083 function verify_get_ident() calls ip_connect() to connect a socket, but
4084 if the "connect()" function timed out, ip_connect() used to close the
4085 socket. However, verify_get_ident() also closes the socket later, and in
4086 between Exim writes to the log, which may get opened at this point. When
4087 the socket was closed in ip_connect(), the log could get the same file
4088 descriptor number as the socket. This naturally causes chaos. The fix is
4089 not to close the socket in ip_connect(); the socket should be closed by
4090 the function that creates it. There was only one place in the code where
4091 this was missing, in the iplookup router, which I don't think anybody now
4092 uses, but I've fixed it anyway.
4094 PH/72 Make dns_again_means_nonexist apply to lookups using gethostbyname() as
4095 well as to direct DNS lookups. Otherwise the handling of names in host
4096 lists is inconsistent and therefore confusing.
4102 PH/01 Two changes to the default runtime configuration:
4104 (1) Move the checks for relay_from_hosts and authenticated clients from
4105 after to before the (commented out) DNS black list checks.
4107 (2) Add control=submission to the relay_from_hosts and authenticated
4108 clients checks, on the grounds that messages accepted by these
4109 statements are most likely to be submissions.
4111 PH/02 Several tidies to the handling of ${prvs and ${prvscheck:
4113 (1) Generate an error if the third argument for the ${prvs expansion is
4116 (2) Treat a missing third argument of ${prvscheck as if it were an empty
4119 (3) Reset the variables that are obtained from the first argument of
4120 ${prvscheck and used in the second argument before leaving the code,
4121 because their memory is reclaimed, so using them afterwards may do
4124 (4) Tidy up the code for expanding the arguments of ${prvscheck one by
4125 one (it's much easier than Tom thought :-).
4127 (5) Because of (4), we can now allow for the use of $prvscheck_result
4128 inside the third argument.
4130 PH/03 For some reason, the default setting of PATH when running a command from
4131 a pipe transport was just "/usr/bin". I have changed it to
4134 PH/04 SUPPORT_TRANSLATE_IP_ADDRESS and MOVE_FROZEN_MESSAGES did not cause
4135 anything to be listed in the output from -bV.
4137 PH/05 When a filter generated an autoreply, the entire To: header line was
4138 quoted in the delivery log line, like this:
4140 => >A.N.Other <ano@some.domain> <original@ddress> ...
4142 This has been changed so that it extracts the operative address. There
4143 may be more than one such address. If so, they are comma-separated, like
4146 => >ano@some.domain,ona@other.domain <original@ddress> ...
4148 PH/06 When a client host used a correct literal IP address in a HELO or EHLO
4149 command, (for example, EHLO [1.2.3.4]) and the client's IP address was
4150 not being looked up in the rDNS to get a host name, Exim was showing the
4151 IP address twice in Received: lines, even though the IP addresses were
4152 identical. For example:
4154 Received: from [1.2.3.4] (helo=[1.2.3.4])
4156 However, if the real host name was known, it was omitting the HELO data
4157 if it matched the actual IP address. This has been tidied up so that it
4158 doesn't show the same IP address twice.
4160 PH/07 When both +timestamp and +memory debugging was on, the value given by
4161 $tod_xxx expansions could be wrong, because the tod_stamp() function was
4162 called by the debug printing, thereby overwriting the timestamp buffer.
4163 Debugging no longer uses the tod_stamp() function when +timestamp is set.
4165 PH/08 When the original message was included in an autoreply transport, it
4166 always said "this is a copy of the message, including all the headers",
4167 even if body_only or headers_only was set. It now gives an appropriate
4170 PH/09 Applied a patch from the Sieve maintainer which:
4172 o fixes some comments
4173 o adds the (disabled) notify extension core
4174 o adds some debug output for the result of if/elsif tests
4175 o points to the current vacation draft in the documentation
4176 and documents the missing references header update
4180 o fixes a bug in processing the envelope test (when testing
4181 multiple envelope elements, the last element determined the
4184 PH/10 Exim was violating RFC 3834 ("Recommendations for Automatic Responses to
4185 Electronic Mail") by including:
4187 Auto-submitted: auto-generated
4189 in the messages that it generates (bounce messages and others, such as
4190 warnings). In the case of bounce messages for non-SMTP messages, there was
4191 also a typo: it was using "Auto_submitted" (underscore instead of
4192 hyphen). Since every message generated by Exim is necessarily in response
4193 to another message, thes have all been changed to:
4195 Auto-Submitted: auto-replied
4197 in accordance with these statements in the RFC:
4199 The auto-replied keyword:
4201 - SHOULD be used on messages sent in direct response to another
4202 message by an automatic process,
4204 - MUST NOT be used on manually-generated messages,
4206 - MAY be used on Delivery Status Notifications (DSNs) and Message
4207 Disposition Notifications (MDNs),
4209 - MUST NOT be used on messages generated by automatic or periodic
4210 processes, except for messages which are automatic responses to
4213 PH/11 Added "${if def:sender_address {(envelope-from <$sender_address>)\n\t}}"
4214 to the default Received: header definition.
4216 PH/12 Added log selector acl_warn_skipped (default on).
4218 PH/13 After a successful wildlsearch lookup, discard the values of numeric
4219 variables because (a) they are in the wrong storage pool and (b) even if
4220 they were copied, it wouldn't work properly because of the caching.
4222 PH/14 Add check_rfc2047_length to disable enforcement of RFC 2047 length
4223 checking when decoding. Apparently there are clients that generate
4224 overlong encoded strings. Why am I not surprised?
4226 PH/15 If the first argument of "${if match_address" was not empty, but did not
4227 contain an "@" character, Exim crashed. Now it writes a panic log message
4228 and treats the condition as false.
4230 PH/16 In autoreply, treat an empty string for "once" the same as unset.
4232 PH/17 A further patch from the Sieve maintainer: "Introduce the new Sieve
4233 extension "envelope-auth". The code is finished and in agreement with
4234 other implementations, but there is no documentation so far and in fact,
4235 nobody wrote the draft yet. This extension is currently #undef'ed, thus
4236 not changing the active code.
4238 Print executed "if" and "elsif" statements when debugging is used. This
4239 helps a great deal to understand what a filter does.
4241 Document more things not specified clearly in RFC3028. I had all this
4242 sorted out, when out of a sudden new issues came to my mind. Oops."
4244 PH/18 Exim was not recognizing the "net-" search type prefix in match_ip lists
4247 PH/19 Exim expands the IPv6 address given to -bh to its full non-abbreviated
4248 canonical form (as documented). However, after a host name lookup from
4249 the IP address, check_host() was doing a simple string comparison with
4250 addresses acquired from the DNS when checking that the found name did
4251 have the original IP as one of its addresses. Since any found IPv6
4252 addresses are likely to be in abbreviated form, the comparison could
4253 fail. Luckily, there already exists a function for doing the comparison
4254 by converting both addresses to binary, so now that is used instead of
4255 the text comparison.
4257 PH/20 There was another similar case to PH/19, when a complete host name was
4258 given in a host list; looking up its IP address could give an abbreviated
4259 form, whereas the current host's name might or might not be abbreviated.
4260 The same fix has been applied.
4266 PH/01 The ${base62: operator adjusted itself to base 36 when BASE_62 was
4267 set to 36 (for Darwin and Cygwin), but the ${base62d: operator did not.
4270 PH/02 Two minor problems detected in Cygwin: the os.{c,h} files had lost */ on
4271 the CVS lines, and there was a missing #if HAVE_IPV6 in host.c.
4273 PH/03 Typo: missing ".o" in src/pcre/Makefile.
4275 PH/04 Tighten up "personal" tests: Instead of testing for any "List-"
4276 header line, restrict the check to what is listed in RFCs 2369 and 2929.
4277 Also, for "Auto-Submitted", treat anything other than "no" as
4278 non-personal, in accordance with RFC 3834. (Previously it treated
4279 anything starting "auto-" as non-personal.)
4281 TF/01 The control=submission/name=... option had a problem with syntax
4282 errors if the name included a slash character. The /name= option
4283 now slurps the rest of the string, so it can include any characters
4284 but it must come last in the list of options (after /sender_retain
4287 PH/05 Some modifications to the interface to the fake nameserver for the new
4295 TK/01 Added the "success_on_redirect" address verification option. See
4296 NewStuff for rationale and an example.
4298 PH/01 Added support for SQLite, basic code supplied by David Woodhouse.
4300 PH/02 Patch to exigrep to allow it to work on syslog lines.
4302 PH/03 When creating an mbox file for a virus/spam scan, use fseek() instead of
4303 fread() to skip over the body file's header line, because in Cygwin the
4304 header line is locked and is inaccessible.
4306 PH/04 Added $message_exim_id, ultimately to replace $message_id (they will both
4307 co-exist for some time) to make it clear that it is the Exim ID that is
4308 referenced, not the Message-ID: header line.
4310 PH/05 Replaced all Tom's calls to snprintf() with calls to the internal
4311 string_format() function, because snprintf() does not exist on all
4314 PH/06 The use of forbid_filter_existstest now also locks out the use of the
4315 ${stat: expansion item.
4317 PH/07 Changed "SMTP protocol violation: synchronization error" into "SMTP
4318 protocol synchronization error", to keep the pedants happy.
4320 PH/08 Arrange for USE_INET_NTOA_FIX to be set in config.h for AIX systems as
4321 well as for IRIX systems, when gcc is being used. See the host.c source
4324 PH/09 Installed latest Cygwin configuration files from the Cygwin maintainer.
4326 PH/10 Named domain lists were not working if used in a queue_smtp_domains
4329 PH/11 Added support for the IGNOREQUOTA extension to LMTP, both to the lmtp
4330 transport and to the smtp transport in LMTP mode.
4332 TK/02 Remove one case of BASE64 error detection FTTB (undocumented anyway).
4334 PH/12 There was a missing call to search_tidyup() before the fork() in rda.c to
4335 run a filter in a subprocess. This could lead to confusion in subsequent
4336 lookups in the parent process. There should also be a search_tidyup() at
4337 the end of the subprocess.
4339 PH/13 Previously, if "verify = helo" was set in an ACL, the condition was true
4340 only if the host matched helo_try_verify_hosts, which caused the
4341 verification to occur when the EHLO/HELO command was issued. The ACL just
4342 tested the remembered result. Now, if a previous verification attempt has
4343 not happened, "verify = helo" does it there and then.
4345 JJ/01 exipick: added $message_exim_id variable (see 4.53-PH/04)
4347 TK/03 Fix log output including CR from clamd.
4349 PH/14 A reference to $reply_address when Reply-to: was empty and From: did not
4350 exist provoked a memory error which could cause a segfault.
4352 PH/15 Installed PCRE 6.2
4354 PH/17 Defined BIND_8_COMPAT in the Darwin os.h file.
4356 PH/18 Reversed 4.52/PH/17 because the HP-UX user found it wasn't the cause
4357 of the problem. Specifically, suggested +O2 rather than +O1 for the
4360 PH/19 Added sqlite_lock_timeout option (David Woodhouse's patch).
4362 PH/20 If a delivery was routed to a non-standard port by means of an SRV
4363 record, the port was not correctly logged when the outgoing_port log
4364 selector was set (it logged the transort's default port).
4366 PH/21 Added support for host-specific ports to manualroute, queryprogram,
4367 fallback_hosts, and "hosts" in the smtp transport.
4369 PH/22 If the log selector "outgoing_port" is set, the port is now also given on
4370 host errors such as "Connection refused".
4372 PH/23 Applied a patch to fix problems with exim-4.52 while doing radius
4373 authentication with radiusclient 0.4.9:
4375 - Error returned from rc_read_config was caught wrongly
4376 - Username/password not passed on to radius server due to wrong length.
4378 The presumption is that some radiusclient API changes for 4.51/PH/17
4379 were not taken care of correctly. The code is still untested by me (my
4380 Linux distribution still has 0.3.2 of radiusclient), but it was
4381 contributed by a Radius user.
4383 PH/24 When doing a callout, the value of $domain wasn't set correctly when
4384 expanding the "port" option of the smtp transport.
4386 TK/04 MIME ACL: Fix buffer underrun that occurs when EOF condition is met
4387 while reading a MIME header. Thanks to Tom Hughes for a patch.
4389 PH/24 Include config.h inside local_scan.h so that configuration settings are
4392 PH/25 Make $smtp_command_argument available after all SMTP commands. This means
4393 that in an ACL for RCPT (for example), you can examine exactly what was
4396 PH/26 Exim was recognizing IPv6 addresses of the form [IPv6:....] in EHLO
4397 commands, but it was not correctly comparing the address with the actual
4398 client host address. Thus, it would show the EHLO address in Received:
4399 header lines when this was not necessary.
4401 PH/27 Added the % operator to ${eval:}.
4403 PH/28 Exim tries to create and chdir to its spool directory when it starts;
4404 it should be ignoring failures (because with -C, for example, it has lost
4405 privilege). It wasn't ignoring creation failures other than "already
4408 PH/29 Added "crypteq" to the list of supported features that Exim outputs when
4411 PH/30 Fixed (presumably very longstanding) bug in exim_dbmbuild: if it failed
4412 because an input line was too long, either on its own, or by virtue of
4413 too many continuations, the temporary file was not being removed, and the
4414 return code was incorrect.
4416 PH/31 Missing "BOOL" in function definition in filtertest.c.
4418 PH/32 Applied Sieve patches from the maintainer.
4420 TK/05 Domainkeys: Accomodate for a minor API change in libdomainkeys 0.67.
4422 PH/33 Added "verify = not_blind".
4424 PH/34 There are settings for CHOWN_COMMAND and MV_COMMAND that can be used in
4425 Local/Makefile (with some defaults set). These are used in built scripts
4426 such as exicyclog, but they have never been used in the exim_install
4427 script (though there are many overriding facilities there). I have
4428 arranged that the exim_install script now takes note of these two
4431 PH/35 Installed configuration files for Dragonfly.
4433 PH/36 When a locally submitted message by a trusted user did not contain a
4434 From: header, and the sender address was obtained from -f or from an SMTP
4435 MAIL command, and the trusted user did not use -F to supply a sender
4436 name, $originator_name was incorrectly used when constructing a From:
4437 header. Furthermore, $originator_name was used for submission mode
4438 messages from external hosts without From: headers in a similar way,
4439 which is clearly wrong.
4441 PH/37 Added control=suppress_local_fixups.
4443 PH/38 When log_selector = +received_sender was set, and the addition of the
4444 sender made the log line's construction buffer exactly full, or one byte
4445 less than full, an overflow happened when the terminating "\n" was
4448 PH/39 Added a new log selector, "unknown_in_list", which provokes a log entry
4449 when the result of a list match is failure because a DNS lookup failed.
4451 PH/40 RM_COMMAND is now used in the building process.
4453 PH/41 Added a "distclean" target to the top-level Makefile; it deletes all
4454 the "build-* directories that it finds.
4456 PH/42 (But a TF fix): In a domain list, Exim incorrectly matched @[] if the IP
4457 address in a domain literal was a prefix of an interface address.
4459 PH/43 (Again a TF fix): In the dnslookup router, do not apply widen_domains
4460 when verifying a sender address, unless rewrite_headers is false.
4462 PH/44 Wrote a long comment about why errors_to addresses are verified as
4463 recipients, not senders.
4465 TF/01 Add missing LIBS=-lm to OS/Makefile-OpenBSD which was overlooked when
4466 the ratelimit ACL was added.
4468 PH/45 Added $smtp_command for the full command (cf $smtp_command_argument).
4470 PH/46 Added extra information about PostgreSQL errors to the error string.
4472 PH/47 Added an interface to a fake DNS resolver for use by the new test suite,
4473 avoiding the need to install special zones in a real server. This is
4474 backwards compatible; if it can't find the fake resolver, it drops back.
4475 Thus, both old and new test suites can be run.
4477 TF/02 Added util/ratelimit.pl
4479 TF/03 Minor fix to the ratelimit code to improve its behaviour in case the
4480 clock is set back in time.
4482 TF/04 Fix the ratelimit support in exim_fixdb. Patch provided by Brian
4483 Candler <B.Candler@pobox.com>.
4485 TF/05 The fix for PH/43 was not completely correct; widen_domains is always
4486 OK for addresses that are the result of redirections.
4488 PH/48 A number of further additions for the benefit of the new test suite,
4489 including a fake gethostbyname() that interfaces to the fake DNS resolver
4492 TF/06 The fix for widen_domains has also been applied to qualify_single and
4493 search_parents which are the other dnslookup options that can cause
4496 PH/49 Michael Haardt's randomized retrying, but as a separate retry parameter
4499 PH/50 Make never_users, trusted_users, admin_groups, trusted_groups expandable.
4501 TF/07 Exim produced the error message "an SRV record indicated no SMTP
4502 service" if it encountered an MX record with an empty target hostname.
4503 The message is now "an MX or SRV record indicated no SMTP service".
4505 TF/08 Change PH/13 introduced the possibility that verify=helo may defer,
4506 if the DNS of the sending site is misconfigured. This is quite a
4507 common situation. This change restores the behaviour of treating a
4508 helo verification defer as a failure.
4510 PH/51 If self=fail was set on a router, the bounce message did not include the
4511 actual error message.
4517 TF/01 Added support for Client SMTP Authorization. See NewStuff for details.
4519 PH/01 When a transport filter timed out in a pipe delivery, and the pipe
4520 command itself ended in error, the underlying message about the transport
4521 filter timeout was being overwritten with the pipe command error. Now the
4522 underlying error message should be appended to the second error message.
4524 TK/01 Fix poll() being unavailable on Mac OSX 10.2.
4526 PH/02 Reduce the amount of output that "make" produces by default. Full output
4527 can still be requested.
4529 PH/03 The warning log line about a condition test deferring for a "warn" verb
4530 was being output only once per connection, rather than after each
4531 occurrence (because it was using the same function as for successful
4532 "warn" verbs). This seems wrong, so I have changed it.
4534 TF/02 Two buglets in acl.c which caused Exim to read a few bytes of memory that
4535 it should not have, which might have caused a crash in the right
4536 circumstances, but probably never did.
4538 PH/04 Installed a modified version of Tony Finch's patch to make submission
4539 mode fix the return path as well as the Sender: header line, and to
4540 add a /name= option so that you can make the user's friendly name appear
4543 TF/03 Added the control = fakedefer ACL modifier.
4545 TF/04 Added the ratelimit ACL condition. See NewStuff for details. Thanks to
4546 Mark Lowes for thorough testing.
4548 TK/02 Rewrote SPF support to work with libspf2 versions >1.2.0.
4550 TK/03 Merged latest SRS patch from Miles Wilton.
4552 PH/05 There's a shambles in IRIX6 - it defines EX_OK in unistd.h which conflicts
4553 with the definition in sysexits.h (which is #included earlier).
4554 Fortunately, Exim does not actually use EX_OK. The code used to try to
4555 preserve the sysexits.h value, by assuming that macro definitions were
4556 scanned for macro replacements. I have been disabused of this notion,
4557 so now the code just undefines EX_OK before #including unistd.h.
4559 PH/06 There is a timeout for writing blocks of data, set by, e.g. data_timeout
4560 in the smtp transport. When a block could not be written in a single
4561 write() function, the timeout was being re-applied to each part-write.
4562 This seems wrong - if the receiver was accepting one byte at a time it
4563 would take for ever. The timeout is now adjusted when this happens. It
4564 doesn't have to be particularly precise.
4566 TK/04 Added simple SPF lookup method in EXPERIMENTAL_SPF. See NewStuff for
4567 details. Thanks to Chris Webb <chris@arachsys.com> for the patch!
4569 PH/07 Added "fullpostmaster" verify option, which does a check to <postmaster>
4570 without a domain if the check to <postmaster@domain> fails.
4572 SC/01 Eximstats: added -xls and the ability to specify output files
4573 (patch written by Frank Heydlauf).
4575 SC/02 Eximstats: use FileHandles for outputting results.
4577 SC/03 Eximstats: allow any combination of xls, txt, and html output.
4579 SC/04 Eximstats: fixed display of large numbers with -nvr option
4581 SC/05 Eximstats: fixed merging of reports with empty tables.
4583 SC/06 Eximstats: added the -include_original_destination flag
4585 SC/07 Eximstats: removed tabs and trailing whitespace.
4587 TK/05 Malware: Improve on aveserver error handling. Patch from Alex Miller.
4589 TK/06 MBOX spool code: Add real "From " MBOX separator line
4590 so the .eml file is really in mbox format (even though
4591 most programs do not really care). Patch from Alex Miller.
4593 TK/07 MBOX spool code: Add X-Envelope-From: and X-Envelope-To: headers.
4594 The latter is generated from $received_to and is only set if the
4595 message has one envelope recipient. SA can use these headers,
4596 obviously out-of-the-box. Patch from Alex Miller.
4598 PH/08 The ${def test on a variable was returning false if the variable's
4599 value was "0", contrary to what the specification has always said!
4600 The result should be true unless the variable is empty.
4602 PH/09 The syntax error of a character other than { following "${if
4603 def:variable_name" (after optional whitespace) was not being diagnosed.
4604 An expansion such as ${if def:sender_ident:{xxx}{yyy}} in which an
4605 accidental colon was present, for example, could give incorrect results.
4607 PH/10 Tidied the code in a number of places where the st_size field of a stat()
4608 result is used (not including appendfile, where other changes are about
4611 PH/11 Upgraded appendfile so that quotas larger than 2G are now supported.
4612 This involved changing a lot of size variables from int to off_t. It
4613 should work with maildirs and everything.
4615 TK/08 Apply fix provided by Michael Haardt to prevent deadlock in case of
4616 spamd dying while we are connected to it.
4618 TF/05 Fixed a ${extract error message typo reported by Jeremy Harris
4621 PH/12 Applied Alex Kiernan's patch for the API change for the error callback
4622 function for BDB 4.3.
4624 PH/13 Changed auto_thaw such that it does not apply to bounce messages.
4626 PH/14 Imported PCRE 6.0; this was more than just a trivial operation because
4627 the sources for PCRE have been re-arranged and more files are now
4630 PH/15 The code I had for printing potentially long long variables in PH/11
4631 above was not the best (it lost precision). The length of off_t variables
4632 is now inspected at build time, and an appropriate printing format (%ld
4633 or %lld) is chosen and #defined by OFF_T_FMT. We also define LONGLONG_T
4634 to be "long long int" or "long int". This is needed for the internal
4635 formatting function string_vformat().
4637 PH/16 Applied Matthew Newton's patch to exicyclog: "If log_file_path is set in
4638 the configuration file to be ":syslog", then the script "guesses" where
4639 the logs files are, rather than using the compiled in default. In our
4640 case the guess is not the same as the compiled default, so the script
4641 suddenly stopped working when I started to use syslog. The patch checks
4642 to see if log_file_path is "". If so, it attempts to read it from exim
4643 with no configuration file to get the compiled in version, before it
4644 falls back to the previous guessing code."
4646 TK/09 Added "prvs" and "prvscheck" expansion items. These help a lot with
4647 implementing BATV in an Exim configuration. See NewStuff for the gory
4650 PH/17 Applied Michael Haardt's patch for HP-UX, affecting only the os.h and
4651 Makefile that are specific to HP-UX.
4653 PH/18 If the "use_postmaster" option was set for a recipient callout together
4654 with the "random" option, the postmaster address was used as the MAIL
4655 FROM address for the random test, but not for the subsequent recipient
4656 test. It is now used for both.
4658 PH/19 Applied Michael Haardt's patch to update Sieve to RFC3028bis. "The
4659 patch removes a few documentation additions to RFC 3028, because the
4660 latest draft now contains them. It adds the new en;ascii-case comparator
4661 and a new error check for 8bit text in MIME parts. Comparator and
4662 require names are now matched exactly. I enabled the subaddress
4663 extension, but it is not well tested yet (read: it works for me)."
4665 PH/20 Added macros for time_t as for off_t (see PH/15 above) and used them to
4666 rework some of the code of TK/09 above to avoid the hardwired use of
4667 "%lld" and "long long". Replaced the call to snprintf() with a call to
4670 PH/21 Added some other messages to those in 4.51/PH/42, namely "All relevant MX
4671 records point to non-existent hosts", "retry timeout exceeded", and
4672 "retry time not reached for any host after a long failure period".
4674 PH/22 Fixed some oversights/typos causing bugs when Exim is compiled with
4675 experimental DomainKeys support:
4677 (1) The filter variables $n0-$n9 and $sn0-$sn9 were broken.
4678 (2) On an error such as an illegally used "control", the wrong name for
4679 the control was given.
4681 These problems did NOT occur unless DomainKeys support was compiled.
4683 PH/23 Added daemon_startup_retries and daemon_startup_sleep.
4685 PH/24 Added ${if match_ip condition.
4687 PH/25 Put debug statements on either side of calls to EXIM_DBOPEN() for hints
4688 databases so that it will be absolutely obvious if a crash occurs in the
4689 DB library. This is a regular occurrence (often caused by mis-matched
4692 PH/26 Insert a lot of missing (void) casts for functions such as chown(),
4693 chmod(), fcntl(), sscanf(), and other functions from stdio.h. These were
4694 picked up on a user's system that detects such things. There doesn't seem
4695 to be a gcc warning option for this - only an attribute that has to be
4696 put on the function's prototype. It seems that in Fedora Core 4 they have
4697 set this on a number of new functions. No doubt there will be more in due
4700 PH/27 If a dnslookup or manualroute router is set with verify=only, it need not
4701 specify a transport. However, if an address that was verified by such a
4702 router was the subject of a callout, Exim crashed because it tried to
4703 read the rcpt_include_affixes from the non-existent transport. Now it
4704 just assumes that the setting of that option is false. This bug was
4705 introduced by 4.51/PH/31.
4707 PH/28 Changed -d+all to exclude +memory, because that information is very
4708 rarely of interest, but it makes the output a lot bigger. People tend to
4709 do -d+all out of habit.
4711 PH/29 Removed support for the Linux-libc5 build, as it is obsolete and the
4712 code in os-type was giving problems when libc.so lives in lib64, like on
4715 PH/30 Exim's DNS code uses the original T_xxx names for DNS record times. These
4716 aren't the modern standard, and it seems that some systems' include files
4717 don't always have them. Exim was already checking for some of the newer
4718 ones like T_AAAA, and defining it itself. I've added checks for all the
4719 record types that Exim uses.
4721 PH/31 When using GnuTLS, if the parameters cache file did not exist, Exim was
4722 not automatically generating a new one, as it is supposed to. This
4723 prevented TLS from working. If the file did exist, but contained invalid
4724 data, a new version was generated, as expected. It was only the case of a
4725 non-existent file that was broken.
4727 TK/10 Domainkeys: Fix a bug in verification that caused a crash in conjunction
4728 with a change in libdomainkeys > 0.64.
4730 TK/11 Domainkeys: Change the logic how the "testing" policy flag is retrieved
4731 from DNS. If the selector record carries the flag, it now has
4732 precedence over the domain-wide flag.
4734 TK/12 Cleared some compiler warnings related to SPF, SRS and DK code.
4736 PH/32 In mua_wrapper mode, if an smtp transport configuration error (such as
4737 the use of a port name that isn't defined in /etc/services) occurred, the
4738 message was deferred as in a normal delivery, and thus remained on the
4739 spool, instead of being failed because of the mua_wrapper setting. This
4740 is now fixed, and I tidied up some of the mua_wrapper messages at the
4743 SC/08 Eximstats: whilst parsing the mainlog(s), store information about
4744 the messages in a hash of arrays rather than using individual hashes.
4745 This is a bit cleaner and results in dramatic memory savings, albeit
4746 at a slight CPU cost.
4748 SC/09 Eximstats: added the -show_rt<list> and the -show_dt<list> flags
4749 as requested by Marc Sherman.
4751 SC/10 Eximstats: added histograms for user specified patterns as requested
4754 SC/11 Eximstats: v1.43 - bugfix for pattern histograms with -h0 specified.
4756 PH/33 Patch from the Cygwin maintainer to add "b" to all occurences of
4757 fopen() in the content-scanning modules that did not already have it.
4763 TK/01 Added Yahoo DomainKeys support via libdomainkeys. See
4764 doc/experimental-spec.txt for details. (http://domainkeys.sf.net)
4766 TK/02 Fix ACL "control" statement not being available in MIME ACL.
4768 TK/03 Fix ACL "regex" condition not being available in MIME ACL.
4770 PH/01 Installed a patch from the Sieve maintainer that allows -bf to be used
4771 to test Sieve filters that use "vacation".
4773 PH/02 Installed a slightly modified version of Nikos Mavrogiannopoulos' patch
4774 that changes the way the GnuTLS parameters are stored in the cache file.
4775 The new format can be generated externally. For backward compatibility,
4776 if the data in the cache doesn't make sense, Exim assumes it has read an
4777 old-format file, and it generates new data and writes a new file. This
4778 means that you can't go back to an older release without removing the
4781 PH/03 A redirect router that has both "unseen" and "one_time" set does not
4782 work if there are any delivery delays because "one_time" forces the
4783 parent to be marked "delivered", so its unseen clone is never tried
4784 again. For this reason, Exim now forbids the simultaneous setting of
4787 PH/04 Change 4.11/85 fixed an obscure bug concerned with addresses that are
4788 redirected to themselves ("homonym" addresses). Read the long ChangeLog
4789 entry if you want to know the details. The fix, however, neglected to
4790 consider the case when local delivery batching is involved. The test for
4791 "previously delivered" was not happening when checking to see if an
4792 address could be batched with a previous (undelivered) one; under
4793 certain circumstances this could lead to multiple deliveries to the same
4796 PH/05 Renamed the macro SOCKLEN_T as EXIM_SOCKLEN_T because AIX uses SOCKLEN_T
4797 in its include files, and this causes problems building Exim.
4799 PH/06 A number of "verify =" ACL conditions have no options (e.g. verify =
4800 header_syntax) but Exim was just ignoring anything given after a slash.
4801 In particular, this caused confusion with an attempt to use "verify =
4802 reverse_host_lookup/defer_ok". An error is now given when options are
4803 supplied for verify items that do not have them. (Maybe reverse_host_
4804 lookup should have a defer_ok option, but that's a different point.)
4806 PH/07 Increase the size of the buffer for incoming SMTP commands from 512 (as
4807 defined by RFC 821) to 2048, because there were problems with some AUTH
4808 commands, and RFC 1869 says the size should be increased for extended
4809 SMTP commands that take arguments.
4811 PH/08 Added ${dlfunc dynamically loaded function for expansion (code from Tony
4814 PH/09 Previously, an attempt to use ${perl when it wasn't compiled gave an
4815 "unknown" error; now it says that the functionality isn't in the binary.
4817 PH/10 Added a nasty fudge to try to recognize and flatten LDAP passwords in
4818 an address' error message when a string expansion fails (syntax or
4819 whatever). Otherwise the password may appear in the log. Following change
4820 PH/42 below, there is no longer a chance of it appearing in a bounce
4823 PH/11 Installed exipick version 20050225.0 from John Jetmore.
4825 PH/12 If the last host in a fallback_hosts list was multihomed, only the first
4826 of its addresses was ever tried. (Bugzilla bug #2.)
4828 PH/13 If "headers_add" in a transport didn't end in a newline, Exim printed
4829 the result incorrectly in the debug output. (It correctly added a newline
4830 to what was transported.)
4832 TF/01 Added $received_time.
4834 PH/14 Modified the default configuration to add an acl_smtp_data ACL, with
4835 commented out examples of how to interface to a virus scanner and to
4836 SpamAssassin. Also added commented examples of av_scanner and
4837 spamd_address settings.
4839 PH/15 Further to TK/02 and TK/03 above, tidied up the tables of what conditions
4840 and controls are allowed in which ACLs. There were a couple of minor
4841 errors. Some of the entries in the conditions table (which is a table of
4842 where they are NOT allowed) were getting very unwieldy; rewrote them as a
4843 negation of where the condition IS allowed.
4845 PH/16 Installed updated OS/os.c-cygwin from the Cygwin maintainer.
4847 PH/17 The API for radiusclient changed at release 0.4.0. Unfortunately, the
4848 header file does not have a version number, so I've had to invent a new
4849 value for RADIUS_LIB_TYPE, namely "RADIUSCLIENTNEW" to request the new
4850 API. The code is untested by me (my Linux distribution still has 0.3.2 of
4851 radiusclient), but it was contributed by a Radius user.
4853 PH/18 Installed Lars Mainka's patch for the support of CRL collections in
4854 files or directories, for OpenSSL.
4856 PH/19 When an Exim process that is running as root has to create an Exim log
4857 file, it does so in a subprocess that runs as exim:exim so as to get the
4858 ownership right at creation (otherwise, other Exim processes might see
4859 the file with the wrong ownership). There was no test for failure of this
4860 fork() call, which would lead to the process getting stuck as it waited
4861 for a non-existent subprocess. Forks do occasionally fail when resources
4862 run out. I reviewed all the other calls to fork(); they all seem to check
4865 PH/20 When checking for unexpected SMTP input at connect time (before writing
4866 the banner), Exim was not dealing correctly with a non-positive return
4867 from the read() function. If the client had disconnected by this time,
4868 the result was a log entry for a synchronization error with an empty
4869 string after "input=" when read() returned zero. If read() returned -1
4870 (an event I could not check), uninitialized data bytes were printed.
4871 There were reports of junk text (parts of files, etc) appearing after
4874 PH/21 Added acl_not_smtp_mime to allow for MIME scanning for non-SMTP messages.
4876 PH/22 Added support for macro redefinition, and (re)definition in between
4877 driver and ACL definitions.
4879 PH/23 The cyrus_sasl authenticator was expanding server_hostname, but then
4880 forgetting to use the resulting value; it was using the unexpanded value.
4882 PH/24 The cyrus_sasl authenticator was advertising mechanisms for which it
4883 hadn't been configured. The fix is from Juergen Kreileder, who
4884 understands it better than I do:
4886 "Here's what I see happening with three configured cyrus_sasl
4887 authenticators configured (plain, login, cram-md5):
4889 On startup auth_cyrus_sasl_init() gets called for each of these.
4890 This means three calls to sasl_listmech() without a specified mech_list.
4891 => SASL tests which mechs of all available mechs actually work
4892 => three warnings about OTP not working
4893 => the returned list contains: plain, login, cram-md5, digest-md5, ...
4895 With the patch, sasl_listmech() also gets called three times. But now
4896 SASL's mech_list option is set to the server_mech specified in the the
4897 authenticator. Or in other words, the answer from sasl_listmech()
4898 gets limited to just the mech you're testing for (which is different
4900 => the return list contains just 'plain' or 'login', 'cram-md5' or
4901 nothing depending on the value of ob->server_mech.
4903 I've just tested the patch: Authentication still works fine,
4904 unavailable mechs specified in the exim configuration are still
4905 caught, and the auth.log warnings about OTP are gone."
4907 PH/25 When debugging is enabled, the contents of the command line are added
4908 to the debugging output, even when log_selector=+arguments is not
4911 PH/26 Change scripts/os-type so that when "uname -s" returns just "GNU", the
4912 answer is "GNU", and only if the return is "GNU/something" is the answer
4915 PH/27 $acl_verify_message is now set immediately after the failure of a
4916 verification in an ACL, and so is available in subsequent modifiers. In
4917 particular, the message can be preserved by coding like this:
4919 warn !verify = sender
4920 set acl_m0 = $acl_verify_message
4922 Previously, $acl_verify_message was set only while expanding "message"
4923 and "log_message" when a very denied access.
4925 PH/28 Modified OS/os.c-Linux with
4927 -#ifndef OS_LOAD_AVERAGE
4928 +#if !defined(OS_LOAD_AVERAGE) && defined(__linux__)
4930 to make Exim compile on kfreebsd-gnu. (I'm totally confused about the
4931 nomenclature these days.)
4933 PH/29 Installed patch from the Sieve maintainer that adds the options
4934 sieve_useraddress and sieve_subaddress to the redirect router.
4936 PH/30 In these circumstances:
4937 . Two addresses routed to the same list of hosts;
4938 . First host does not offer TLS;
4939 . First host accepts first address;
4940 . First host gives temporary error to second address;
4941 . Second host offers TLS and a TLS session is established;
4942 . Second host accepts second address.
4943 Exim incorrectly logged both deliveries with the TLS parameters (cipher
4944 and peerdn, if requested) that were in fact used only for the second
4947 PH/31 When doing a callout as part of verifying an address, Exim was not paying
4948 attention to any local part prefix or suffix that was matched by the
4949 router that accepted the address. It now behaves in the same way as it
4950 does for delivery: the affixes are removed from the local part unless
4951 rcpt_include_affixes is set on the transport.
4953 PH/32 Add the sender address, as F=<...>, to the log line when logging a
4954 timeout during the DATA phase of an incoming message.
4956 PH/33 Sieve envelope tests were broken for match types other than :is. I have
4957 applied a patch sanctioned by the Sieve maintainer.
4959 PH/34 Change 4.50/80 broke Exim in that it could no longer handle cases where
4960 the uid or gid is negative. A case of a negative gid caused this to be
4961 noticed. The fix allows for either to be negative.
4963 PH/35 ACL_WHERE_MIME is now declared unconditionally, to avoid too much code
4964 clutter, but the tables that are indexed by ACL_WHERE_xxx values had been
4967 PH/36 The change PH/12 above was broken. Fixed it.
4969 PH/37 Exim used to check for duplicate addresses in the middle of routing, on
4970 the grounds that routing the same address twice would always produce the
4971 same answer. This might have been true once, but it is certainly no
4972 longer true now. Routing a child address may depend on the previous
4973 routing that produced that child. Some complicated redirection strategies
4974 went wrong when messages had multiple recipients, and made Exim's
4975 behaviour dependent on the order in which the addresses were given.
4977 I have moved the duplicate checking until after the routing is complete.
4978 Exim scans the addresses that are assigned to local and remote
4979 transports, and removes any duplicates. This means that more work will be
4980 done, as duplicates will always all be routed, but duplicates are
4981 presumably rare, so I don't expect this is of any significance.
4983 For deliveries to pipes, files, and autoreplies, the duplicate checking
4984 still happens during the routing process, since they are not going to be
4987 PH/38 Installed a patch from Ian Freislich, with the agreement of Tom Kistner.
4988 It corrects a timeout issue with spamd. This is Ian's comment: "The
4989 background is that sometimes spamd either never reads data from a
4990 connection it has accepted, or it never writes response data. The exiscan
4991 spam.[ch] uses a 3600 second timeout on spamd socket reads, further, it
4992 blindly assumes that writes won't block so it may never time out."
4994 PH/39 Allow G after quota size as well as K and M.
4996 PH/40 The value set for $authenticated_id in an authenticator may not contain
4997 binary zeroes or newlines because the value is written to log lines and
4998 to spool files. There was no check on this. Now the value is run through
4999 the string_printing() function so that such characters are converted to
5000 printable escape sequences.
5002 PH/41 $message_linecount is a new variable that contains the total number of
5003 lines in the message. Compare $body_linecount, which is the count for the
5006 PH/42 Exim no longer gives details of delivery errors for specific addresses in
5007 bounce and delay warning messages, except in certain special cases, which
5010 (a) An SMTP error message from a remote host;
5011 (b) A message specified in a :fail: redirection;
5012 (c) A message specified in a "fail" command in a system filter;
5013 (d) A message specified in a FAIL return from the queryprogram router;
5014 (e) A message specified by the cannot_route_message router option.
5016 In these cases only, Exim does include the error details in bounce and
5017 warning messages. There are also a few cases where bland messages such
5018 as "unrouteable address" or "local delivery error" are given.
5020 PH/43 $value is now also set for the "else" part of a ${run expansion.
5022 PH/44 Applied patch from the Sieve maintainer: "The vacation draft is still
5023 being worked on, but at least Exim now implements the latest version to
5026 PH/45 In a pipe transport, although a timeout while waiting for the pipe
5027 process to complete was treated as a delivery failure, a timeout while
5028 writing the message to the pipe was logged, but erroneously treated as a
5029 successful delivery. Such timeouts include transport filter timeouts. For
5030 consistency with the overall process timeout, these timeouts are now
5031 treated as errors, giving rise to delivery failures by default. However,
5032 there is now a new Boolean option for the pipe transport called
5033 timeout_defer, which, if set TRUE, converts the failures into defers for
5034 both kinds of timeout. A transport filter timeout is now identified in
5037 PH/46 The "scripts/Configure-config.h" script calls "make" at one point. On
5038 systems where "make" and "gmake" are different, calling "gmake" at top
5039 level broke things. I've arranged for the value of $(MAKE) to be passed
5040 from the Makefile to this script so that it can call the same version of
5044 A note about Exim versions 4.44 and 4.50
5045 ----------------------------------------
5047 Exim 4.50 was meant to be the next release after 4.43. It contains a lot of
5048 changes of various kinds. As a consequence, a big documentation update was
5049 needed. This delayed the release for rather longer than seemed good, especially
5050 in the light of a couple of (minor) security issues. Therefore, the changes
5051 that fixed bugs were backported into 4.43, to create a 4.44 maintenance
5052 release. So 4.44 and 4.50 are in effect two different branches that both start
5055 I have left the 4.50 change log unchanged; it contains all the changes since
5056 4.43. The change log for 4.44 is below; many of its items are identical to
5057 those for 4.50. This seems to be the most sensible way to preserve the
5058 historical information.
5064 1. Minor wording change to the doc/README.SIEVE file.
5066 2. Change 4.43/35 introduced a bug: if quota_filecount was set, the
5067 computation of the current number of files was incorrect.
5069 3. Closing a stable door: arrange to panic-die if setitimer() ever fails. The
5070 bug fixed in 4.43/37 would have been diagnosed quickly if this had been in
5073 4. Give more explanation in the error message when the command for a transport
5074 filter fails to execute.
5076 5. There are several places where Exim runs a non-Exim command in a
5077 subprocess. The SIGUSR1 signal should be disabled for these processes. This
5078 was being done only for the command run by the queryprogram router. It is
5079 now done for all such subprocesses. The other cases are: ${run, transport
5080 filters, and the commands run by the lmtp and pipe transports.
5082 6. Added CONFIGURE_GROUP build-time option.
5084 7. Some older OS have a limit of 256 on the maximum number of file
5085 descriptors. Exim was using setrlimit() to set 1000 as a large value
5086 unlikely to be exceeded. Change 4.43/17 caused a lot of logging on these
5087 systems. I've change it so that if it can't get 1000, it tries for 256.
5089 8. "control=submission" was allowed, but had no effect, in a DATA ACL. This
5090 was an oversight, and furthermore, ever since the addition of extra
5091 controls (e.g. 4.43/32), the checks on when to allow different forms of
5092 "control" were broken. There should now be diagnostics for all cases when a
5093 control that does not make sense is encountered.
5095 9. Added the /retain_sender option to "control=submission".
5097 10. $recipients is now available in the predata ACL (oversight).
5099 11. Tidy the search cache before the fork to do a delivery from a message
5100 received from the command line. Otherwise the child will trigger a lookup
5101 failure and thereby defer the delivery if it tries to use (for example) a
5102 cached ldap connection that the parent has called unbind on.
5104 12. If verify=recipient was followed by verify=sender in a RCPT ACL, the value
5105 of $address_data from the recipient verification was clobbered by the
5106 sender verification.
5108 13. The value of address_data from a sender verification is now available in
5109 $sender_address_data in subsequent conditions in the ACL statement.
5111 14. Added forbid_sieve_filter and forbid_exim_filter to the redirect router.
5113 15. Added a new option "connect=<time>" to callout options, to set a different
5116 16. If FIXED_NEVER_USERS was defined, but empty, Exim was assuming the uid 0
5117 was its contents. (It was OK if the option was not defined at all.)
5119 17. A "Completed" log line is now written for messages that are removed from
5120 the spool by the -Mrm option.
5122 18. New variables $sender_verify_failure and $recipient_verify_failure contain
5123 information about exactly what failed.
5125 19. Added -dd to debug only the daemon process.
5127 20. Incorporated Michael Haardt's patch to ldap.c for improving the way it
5128 handles timeouts, both on the server side and network timeouts. Renamed the
5129 CONNECT parameter as NETTIMEOUT (but kept the old name for compatibility).
5131 21. The rare case of EHLO->STARTTLS->HELO was setting the protocol to "smtp".
5132 It is now set to "smtps".
5134 22. $host_address is now set to the target address during the checking of
5135 ignore_target_hosts.
5137 23. When checking ignore_target_hosts for an ipliteral router, no host name was
5138 being passed; this would have caused $sender_host_name to have been used if
5139 matching the list had actually called for a host name (not very likely,
5140 since this list is usually IP addresses). A host name is now passed as
5143 24. Changed the calls that set up the SIGCHLD handler in the daemon to use the
5144 code that specifies a non-restarting handler (typically sigaction() in
5145 modern systems) in an attempt to fix a rare and obscure crash bug.
5147 25. Narrowed the window for a race in the daemon that could cause it to ignore
5148 SIGCHLD signals. This is not a major problem, because they are used only to
5149 wake it up if nothing else does.
5151 26. A malformed maildirsize file could cause Exim to calculate negative values
5152 for the mailbox size or file count. Odd effects could occur as a result.
5153 The maildirsize information is now recalculated if the size or filecount
5156 27. Added HAVE_SYS_STATVFS_H to the os.h file for Linux, as it has had this
5157 support for a long time. Removed HAVE_SYS_VFS_H.
5159 28. Installed the latest version of exipick from John Jetmore.
5161 29. In an address list, if the pattern was not a regular expression, an empty
5162 subject address (from a bounce message) matched only if the pattern was an
5163 empty string. Non-empty patterns were not even tested. This was the wrong
5164 because it is perfectly reasonable to use an empty address as part of a
5165 database query. An empty address is now tested by patterns that are
5166 lookups. However, all the other forms of pattern expect the subject to
5167 contain a local part and a domain, and therefore, for them, an empty
5168 address still always fails if the pattern is not itself empty.
5170 30. Exim went into a mad DNS loop when attempting to do a callout where the
5171 host was specified on an smtp transport, and looking it up yielded more
5172 than one IP address.
5174 31. Re-factored the code for checking spool and log partition space into a
5175 function that finds that data and another that does the check. The former
5176 is then used to implement four new variables: $spool_space, $log_space,
5177 $spool_inodes, and $log_inodes.
5179 32. The RFC2047 encoding function was originally intended for short strings
5180 such as real names; it was not keeping to the 75-character limit for
5181 encoded words that the RFC imposes. It now respects the limit, and
5182 generates multiple encoded words if necessary. To be on the safe side, I
5183 have increased the buffer size for the ${rfc2047: expansion operator from
5186 33. It is now permitted to omit both strings after an "if" condition; if the
5187 condition is true, the result is "true". As before, when the second string
5188 is omitted, a false condition yields an empty string. This makes it less
5189 cumbersome to write custom ACL and router conditions.
5191 34. Failure to deliver a bounce message always caused it to be frozen, even if
5192 there was an errors_to setting on the router. The errors_to setting is now
5195 35. If an IPv6 address is given for -bh or -bhc, it is now converted to the
5196 canonical form (fully expanded) before being placed in
5197 $sender_host_address.
5199 36. The table in the code that translates DNS record types into text (T_A to
5200 "A" for instance) was missing entries for NS and CNAME. It is just possible
5201 that this could have caused confusion if both these types were looked up
5202 for the same domain, because the text type is used as part of Exim's
5203 per-process caching. But the chance of anyone hitting this buglet seems
5206 37. The dnsdb lookup has been extended in a number of ways.
5208 (1) There is a new type, "zns", which walks up the domain tree until it
5209 finds some nameserver records. It should be used with care.
5211 (2) There is a new type, "mxh", which is like "mx" except that it returns
5212 just the host names, not the priorities.
5214 (3) It is now possible to give a list of domains (or IP addresses) to be
5215 looked up. The behaviour when one of the lookups defers can be
5216 controlled by a keyword.
5218 (4) It is now possible to specify the separator character for use when
5219 multiple records are returned.
5221 38. The dnslists ACL condition has been extended: it is now possible to supply
5222 a list of IP addresses and/or domains to be looked up in a particular DNS
5225 39. Added log_selector=+queue_time_overall.
5227 40. When running the queue in the test harness, wait just a tad after forking a
5228 delivery process, to get repeatability of debugging output.
5230 41. Include certificate and key file names in error message when GnuTLS fails
5231 to set them up, because the GnuTLS error message doesn't include the name
5232 of the failing file when there is a problem reading it.
5234 42. Allow both -bf and -bF in the same test run.
5236 43. Did the same fix as 41 above for OpenSSL, which had the same infelicity.
5238 44. The "Exiscan patch" is now merged into the mainline Exim source.
5240 45. Sometimes the final signoff response after QUIT could fail to get
5241 transmitted in the non-TLS case. Testing !tls_active instead of tls_active
5242 < 0 before doing a fflush(). This bug looks as though it goes back to the
5243 introduction of TLS in release 3.20, but "sometimes" must have been rare
5244 because the tests only now provoked it.
5246 46. Reset the locale to "C" after calling embedded Perl, in case it was changed
5247 (this can affect the format of dates).
5249 47. exim_tidydb, when checking for the continued existence of a message for
5250 which it has found a message-specific retry record, was not finding
5251 messages that were in split spool directories. Consequently, it was
5252 deleting retry records that should have stayed in existence.
5254 48. Steve fixed some bugs in eximstats.
5256 49. The SPA authentication driver was not abandoning authentication and moving
5257 on to the next authenticator when an expansion was forced to fail,
5258 contradicting the general specification for all authenticators. Instead it
5259 was generating a temporary error. It now behaves as specified.
5261 50. The default ordering of permitted cipher suites for GnuTLS was pessimal
5262 (the order specifies the preference for clients). The order is now AES256,
5263 AES128, 3DES, ARCFOUR128.
5265 51. Small patch to Sieve code - explicitly set From: when generating an
5268 52. Exim crashed if a remote delivery caused a very long error message to be
5269 recorded - for instance if somebody sent an entire SpamAssassin report back
5270 as a large number of 550 error lines. This bug was coincidentally fixed by
5271 increasing the size of one of Exim's internal buffers (big_buffer) that
5272 happened as part of the Exiscan merge. However, to be on the safe side, I
5273 have made the code more robust (and fixed the comments that describe what
5276 53. Now that there can be additional text after "Completed" in log lines (if
5277 the queue_time_overall log selector is set), a one-byte patch to exigrep
5278 was needed to allow it to recognize "Completed" as not the last thing in
5281 54. The LDAP lookup was not handling a return of LDAP_RES_SEARCH_REFERENCE. A
5282 patch that reportedly fixes this has been added. I am not expert enough to
5283 create a test for it. This is what the patch creator wrote:
5285 "I found a little strange behaviour of ldap code when working with
5286 Windows 2003 AD Domain, where users was placed in more than one
5287 Organization Units. When I tried to give exim partial DN, the exit code
5288 of ldap_search was unknown to exim because of LDAP_RES_SEARCH_REFERENCE.
5289 But simultaneously result of request was absolutely normal ldap result,
5290 so I produce this patch..."
5292 Later: it seems that not all versions of LDAP support LDAP_RES_SEARCH_
5293 REFERENCE, so I have modified the code to exclude the patch when that macro
5296 55. Some experimental protocols are using DNS PTR records for new purposes. The
5297 keys for these records are domain names, not reversed IP addresses. The
5298 dnsdb PTR lookup now tests whether its key is an IP address. If not, it
5299 leaves it alone. Component reversal etc. now happens only for IP addresses.
5302 56. Improve error message when ldap_search() fails in OpenLDAP or Solaris LDAP.
5304 57. Double the size of the debug message buffer (to 2048) so that more of very
5305 long debug lines gets shown.
5307 58. The exicyclog utility now does better if the number of log files to keep
5308 exceeds 99. In this case, it numbers them 001, 002 ... instead of 01, 02...
5310 59. Two changes related to the smtp_active_hostname option:
5312 (1) $smtp_active_hostname is now available as a variable.
5313 (2) The default for smtp_banner uses $smtp_active_hostname instead
5314 of $primary_hostname.
5316 60. The host_aton() function is supposed to be passed a string that is known
5317 to be a valid IP address. However, in the case of IPv6 addresses, it was
5318 not checking this. This is a hostage to fortune. Exim now panics and dies
5319 if the condition is not met. A case was found where this could be provoked
5320 from a dnsdb PTR lookup with an IPv6 address that had more than 8
5321 components; fortuitously, this particular loophole had already been fixed
5322 by change 4.50/55 above.
5324 If there are any other similar loopholes, the new check in host_aton()
5325 itself should stop them being exploited. The report I received stated that
5326 data on the command line could provoke the exploit when Exim was running as
5327 exim, but did not say which command line option was involved. All I could
5328 find was the use of -be with a bad dnsdb PTR lookup, and in that case it is
5329 running as the user.
5332 61. There was a buffer overflow vulnerability in the SPA authentication code
5333 (which came originally from the Samba project). I have added a test to the
5334 spa_base64_to_bits() function which I hope fixes it.
5337 62. Configuration update for GNU/Hurd and variations. Updated Makefile-GNU and
5338 os.h-GNU, and added configuration files for GNUkFreeBSD and GNUkNetBSD.
5340 63. The daemon start-up calls getloadavg() while still root for those OS that
5341 need the first call to be done as root, but it missed one case: when
5342 deliver_queue_load_max is set with deliver_drop_privilege. This is
5343 necessary for the benefit of the queue runner, because there is no re-exec
5344 when deliver_drop_privilege is set.
5346 64. A call to exiwhat cut short delays set up by "delay" modifiers in ACLs.
5347 This has been fixed.
5349 65. Caching of lookup data for "hosts =" ACL conditions, when a named host list
5350 was in use, was not putting the data itself into the right store pool;
5351 consequently, it could be overwritten for a subsequent message in the same
5352 SMTP connection. (Fix 4.40/11 dealt with the non-cache case, but overlooked
5355 66. Added hosts_max_try_hardlimit to the smtp transport, default 50.
5357 67. The string_is_ip_address() function returns 0, 4, or 6, for "no an IP
5358 address", "IPv4 address", and "IPv6 address", respectively. Some calls of
5359 the function were treating the return as a boolean value, which happened to
5360 work because 0=false and not-0=true, but is not correct code.
5362 68. The host_aton() function was not handling scoped IPv6 addresses (those
5363 with, for example, "%eth0" on the end) correctly.
5365 69. Fixed some compiler warnings in acl.c for the bitmaps specified with
5366 negated items (that is, ~something) in unsigned ints. Some compilers
5367 apparently mutter when there is no cast.
5369 70. If an address verification called from an ACL failed, and did not produce a
5370 user-specific message (i.e. there was only a "system" message), nothing was
5371 put in $acl_verify_message. In this situation, it now puts the system
5374 71. Change 4.23/11 added synchronization checking at the start of an SMTP
5375 session; change 4.31/43 added the unwanted input to the log line - except
5376 that it did not do this in the start of session case. It now does.
5378 72. After a timeout in a callout SMTP session, Exim still sent a QUIT command.
5379 This is wrong and can cause the other end to generate a synchronization
5380 error if it is another Exim or anything else that does the synchronization
5381 check. A QUIT command is no longer sent after a timeout.
5383 73. $host_lookup_deferred has been added, to make it easier to detect DEFERs
5384 during host lookups.
5386 74. The defer_ok option of callout verification was not working if it was used
5387 when verifying addresses in header lines, that is, for this case:
5389 verify = header_sender/callout=defer_ok
5391 75. A backgrounded daemon closed stdin/stdout/stderr on entry; this meant that
5392 those file descriptors could be used for SMTP connections. If anything
5393 wrote to stderr (the example that came up was "warn" in embedded Perl), it
5394 could be sent to the SMTP client, causing chaos. The daemon now opens
5395 stdin, stdout, and stderr to /dev/null when it puts itself into the
5398 76. Arrange for output from Perl's "warn" command to be written to Exim's main
5399 log by default. The user can override this with suitable Perl magic.
5401 77. The use of log_message on a "discard" ACL verb, which is supposed to add to
5402 the log message when discard triggers, was not working for the DATA ACL or
5403 for the non-SMTP ACL.
5405 78. Error message wording change in sieve.c.
5407 79. If smtp_accept_max_per_host was set, the number of connections could be
5408 restricted to fewer than expected, because the daemon was trying to set up
5409 a new connection before checking whether the processes handling previous
5410 connections had finished. The check for completed processes is now done
5411 earlier. On busy systems, this bug wouldn't be noticed because something
5412 else would have woken the daemon, and it would have reaped the completed
5415 80. If a message was submitted locally by a user whose login name contained one
5416 or more spaces (ugh!), the spool file that Exim wrote was not re-readable.
5417 It caused a spool format error. I have fixed the spool reading code. A
5418 related problem was that the "from" clause in the Received: line became
5419 illegal because of the space(s). It is now covered by ${quote_local_part.
5421 81. Included the latest eximstats from Steve (adds average sizes to HTML Top
5424 82. Updated OS/Makefile-AIX as per message from Mike Meredith.
5426 83. Patch from Sieve maintainer to fix unterminated string problem in
5427 "vacation" handling.
5429 84. Some minor changes to the Linux configuration files to help with other
5430 OS variants using glibc.
5432 85. One more patch for Sieve to update vacation handling to latest spec.
5435 ----------------------------------------------------
5436 See the note above about the 4.44 and 4.50 releases.
5437 ----------------------------------------------------
5443 1. Change 4.43/35 introduced a bug that caused file counts to be
5444 incorrectly computed when quota_filecount was set in an appendfile
5447 2. Closing a stable door: arrange to panic-die if setitimer() ever fails. The
5448 bug fixed in 4.43/37 would have been diagnosed quickly if this had been in
5451 3. Give more explanation in the error message when the command for a transport
5452 filter fails to execute.
5454 4. There are several places where Exim runs a non-Exim command in a
5455 subprocess. The SIGUSR1 signal should be disabled for these processes. This
5456 was being done only for the command run by the queryprogram router. It is
5457 now done for all such subprocesses. The other cases are: ${run, transport
5458 filters, and the commands run by the lmtp and pipe transports.
5460 5. Some older OS have a limit of 256 on the maximum number of file
5461 descriptors. Exim was using setrlimit() to set 1000 as a large value
5462 unlikely to be exceeded. Change 4.43/17 caused a lot of logging on these
5463 systems. I've change it so that if it can't get 1000, it tries for 256.
5465 6. "control=submission" was allowed, but had no effect, in a DATA ACL. This
5466 was an oversight, and furthermore, ever since the addition of extra
5467 controls (e.g. 4.43/32), the checks on when to allow different forms of
5468 "control" were broken. There should now be diagnostics for all cases when a
5469 control that does not make sense is encountered.
5471 7. $recipients is now available in the predata ACL (oversight).
5473 8. Tidy the search cache before the fork to do a delivery from a message
5474 received from the command line. Otherwise the child will trigger a lookup
5475 failure and thereby defer the delivery if it tries to use (for example) a
5476 cached ldap connection that the parent has called unbind on.
5478 9. If verify=recipient was followed by verify=sender in a RCPT ACL, the value
5479 of $address_data from the recipient verification was clobbered by the
5480 sender verification.
5482 10. If FIXED_NEVER_USERS was defined, but empty, Exim was assuming the uid 0
5483 was its contents. (It was OK if the option was not defined at all.)
5485 11. A "Completed" log line is now written for messages that are removed from
5486 the spool by the -Mrm option.
5488 12. $host_address is now set to the target address during the checking of
5489 ignore_target_hosts.
5491 13. When checking ignore_target_hosts for an ipliteral router, no host name was
5492 being passed; this would have caused $sender_host_name to have been used if
5493 matching the list had actually called for a host name (not very likely,
5494 since this list is usually IP addresses). A host name is now passed as
5497 14. Changed the calls that set up the SIGCHLD handler in the daemon to use the
5498 code that specifies a non-restarting handler (typically sigaction() in
5499 modern systems) in an attempt to fix a rare and obscure crash bug.
5501 15. Narrowed the window for a race in the daemon that could cause it to ignore
5502 SIGCHLD signals. This is not a major problem, because they are used only to
5503 wake it up if nothing else does.
5505 16. A malformed maildirsize file could cause Exim to calculate negative values
5506 for the mailbox size or file count. Odd effects could occur as a result.
5507 The maildirsize information is now recalculated if the size or filecount
5510 17. Added HAVE_SYS_STATVFS_H to the os.h file for Linux, as it has had this
5511 support for a long time. Removed HAVE_SYS_VFS_H.
5513 18. Updated exipick to current release from John Jetmore.
5515 19. Allow an empty sender to be matched against a lookup in an address list.
5516 Previously the only cases considered were a regular expression, or an
5519 20. Exim went into a mad DNS lookup loop when doing a callout where the
5520 host was specified on the transport, if the DNS lookup yielded more than
5523 21. The RFC2047 encoding function was originally intended for short strings
5524 such as real names; it was not keeping to the 75-character limit for
5525 encoded words that the RFC imposes. It now respects the limit, and
5526 generates multiple encoded words if necessary. To be on the safe side, I
5527 have increased the buffer size for the ${rfc2047: expansion operator from
5530 22. Failure to deliver a bounce message always caused it to be frozen, even if
5531 there was an errors_to setting on the router. The errors_to setting is now
5534 23. If an IPv6 address is given for -bh or -bhc, it is now converted to the
5535 canonical form (fully expanded) before being placed in
5536 $sender_host_address.
5538 24. Updated eximstats to version 1.33
5540 25. Include certificate and key file names in error message when GnuTLS fails
5541 to set them up, because the GnuTLS error message doesn't include the name
5542 of the failing file when there is a problem reading it.
5544 26. Expand error message when OpenSSL has problems setting up cert/key files.
5547 27. Reset the locale to "C" after calling embedded Perl, in case it was changed
5548 (this can affect the format of dates).
5550 28. exim_tidydb, when checking for the continued existence of a message for
5551 which it has found a message-specific retry record, was not finding
5552 messages that were in split spool directories. Consequently, it was
5553 deleting retry records that should have stayed in existence.
5555 29. eximstats updated to version 1.35
5556 1.34 - allow eximstats to parse syslog lines as well as mainlog lines
5557 1.35 - bugfix such that pie charts by volume are generated correctly
5559 30. The SPA authentication driver was not abandoning authentication and moving
5560 on to the next authenticator when an expansion was forced to fail,
5561 contradicting the general specification for all authenticators. Instead it
5562 was generating a temporary error. It now behaves as specified.
5564 31. The default ordering of permitted cipher suites for GnuTLS was pessimal
5565 (the order specifies the preference for clients). The order is now AES256,
5566 AES128, 3DES, ARCFOUR128.
5568 31. Small patch to Sieve code - explicitly set From: when generating an
5571 32. Exim crashed if a remote delivery caused a very long error message to be
5572 recorded - for instance if somebody sent an entire SpamAssassin report back
5573 as a large number of 550 error lines. This bug was coincidentally fixed by
5574 increasing the size of one of Exim's internal buffers (big_buffer) that
5575 happened as part of the Exiscan merge. However, to be on the safe side, I
5576 have made the code more robust (and fixed the comments that describe what
5579 33. Some experimental protocols are using DNS PTR records for new purposes. The
5580 keys for these records are domain names, not reversed IP addresses. The
5581 dnsdb PTR lookup now tests whether its key is an IP address. If not, it
5582 leaves it alone. Component reversal etc. now happens only for IP addresses.
5585 34. The host_aton() function is supposed to be passed a string that is known
5586 to be a valid IP address. However, in the case of IPv6 addresses, it was
5587 not checking this. This is a hostage to fortune. Exim now panics and dies
5588 if the condition is not met. A case was found where this could be provoked
5589 from a dnsdb PTR lookup with an IPv6 address that had more than 8
5590 components; fortuitously, this particular loophole had already been fixed
5591 by change 4.50/55 or 4.44/33 above.
5593 If there are any other similar loopholes, the new check in host_aton()
5594 itself should stop them being exploited. The report I received stated that
5595 data on the command line could provoke the exploit when Exim was running as
5596 exim, but did not say which command line option was involved. All I could
5597 find was the use of -be with a bad dnsdb PTR lookup, and in that case it is
5598 running as the user.
5601 35. There was a buffer overflow vulnerability in the SPA authentication code
5602 (which came originally from the Samba project). I have added a test to the
5603 spa_base64_to_bits() function which I hope fixes it.
5606 36. The daemon start-up calls getloadavg() while still root for those OS that
5607 need the first call to be done as root, but it missed one case: when
5608 deliver_queue_load_max is set with deliver_drop_privilege. This is
5609 necessary for the benefit of the queue runner, because there is no re-exec
5610 when deliver_drop_privilege is set.
5612 37. Caching of lookup data for "hosts =" ACL conditions, when a named host list
5613 was in use, was not putting the data itself into the right store pool;
5614 consequently, it could be overwritten for a subsequent message in the same
5615 SMTP connection. (Fix 4.40/11 dealt with the non-cache case, but overlooked
5618 38. Sometimes the final signoff response after QUIT could fail to get
5619 transmitted in the non-TLS case. Testing !tls_active instead of tls_active
5620 < 0 before doing a fflush(). This bug looks as though it goes back to the
5621 introduction of TLS in release 3.20, but "sometimes" must have been rare
5622 because the tests only now provoked it.
5628 1. Fixed a longstanding but relatively impotent bug: a long time ago, before
5629 PIPELINING, the function smtp_write_command() used to return TRUE or FALSE.
5630 Now it returns an integer. A number of calls were still expecting a T/F
5631 return. Fortuitously, in all cases, the tests worked in OK situations,
5632 which is the norm. However, things would have gone wrong on any write
5633 failures on the smtp file descriptor. This function is used when sending
5634 messages over SMTP and also when doing verify callouts.
5636 2. When Exim is called to do synchronous delivery of a locally submitted
5637 message (the -odf or -odi options), it no longer closes stderr before doing
5640 3. Implemented the mua_wrapper option.
5642 4. Implemented mx_fail_domains and srv_fail_domains for the dnslookup router.
5644 5. Implemented the functions header_remove(), header_testname(),
5645 header_add_at_position(), and receive_remove_recipient(), and exported them
5648 6. If an ACL "warn" statement specified the addition of headers, Exim already
5649 inserted X-ACL-Warn: at the start if there was no header name. However, it
5650 was not making this test for the second and subsequent header lines if
5651 there were newlines in the string. This meant that an invalid header could
5652 be inserted if Exim was badly configured.
5654 7. Allow an ACL "warn" statement to add header lines at the start or after all
5655 the Received: headers, as well as at the end.
5657 8. Added the rcpt_4xx retry error code.
5659 9. Added postmaster_mailfrom=xxx to callout verification option.
5661 10. Added mailfrom=xxxx to the callout verification option, for verify=
5664 11. ${substr_1_:xxxx} and ${substr__3:xxxx} are now diagnosed as syntax errors
5665 (they previously behaved as ${substr_1_0:xxxx} and ${substr:_0_3:xxxx}).
5667 12. Inserted some casts to stop certain compilers warning when using pointer
5668 differences as field lengths or precisions in printf-type calls (mostly
5669 affecting debugging statements).
5671 13. Added optional readline() support for -be (dynamically loaded).
5673 14. Obscure bug fix: if a message error (e.g. 4xx to MAIL) happened within the
5674 same clock tick as a message's arrival, so that its received time was the
5675 same as the "first fail" time on the retry record, and that message
5676 remained on the queue past the ultimate address timeout, every queue runner
5677 would try a delivery (because it was past the ultimate address timeout) but
5678 after another failure, the ultimate address timeout, which should have then
5679 bounced the address, did not kick in. This was a "< instead of <=" error;
5680 in most cases the first failure would have been in the next clock tick
5681 after the received time, and all would be well.
5683 15. The special items beginning with @ in domain lists (e.g. @mx_any) were not
5684 being recognized when the domain list was tested by the match_domain
5685 condition in an expansion string.
5687 16. Added the ${str2b64: operator.
5689 17. Exim was always calling setrlimit() to set a large limit for the number of
5690 processes, without checking whether the existing limit was already
5691 adequate. (It did check for the limit on file descriptors.) Furthermore,
5692 errors from getrlimit() and setrlimit() were being ignored. Now they are
5693 logged to the main and panic logs, but Exim does carry on, to try to do its
5694 job under whatever limits there are.
5696 18. Imported PCRE 5.0.
5698 19. Trivial typo in log message " temporarily refused connection" (the leading
5701 20. If the log selector return_path_on_delivery was set and an address was
5702 redirected to /dev/null, the delivery process crashed because it assumed
5703 that a return path would always be set for a "successful" delivery. In this
5704 case, the whole delivery is bypassed as an optimization, and therefore no
5707 21. Internal re-arrangement: the function for sending a challenge and reading
5708 a response while authentication was assuming a zero-terminated challenge
5709 string. It's now changed to take a pointer and a length, to allow for
5710 binary data in such strings.
5712 22. Added the cyrus_sasl authenticator (code supplied by MBM).
5714 23. Exim was not respecting finduser_retries when seeking the login of the
5715 uid under which it was called; it was always trying 10 times. (The default
5716 setting of finduser_retries is zero.) Also, it was sleeping after the final
5717 failure, which is pointless.
5719 24. Implemented tls_on_connect_ports.
5721 25. Implemented acl_smtp_predata.
5723 26. If the domain in control=submission is set empty, Exim assumes that the
5724 authenticated id is a complete email address when it generates From: or
5725 Sender: header lines.
5727 27. Added "#define SOCKLEN_T int" to OS/os.h-SCO and OS/os.h-SCO_SV. Also added
5728 definitions to OS/Makefile-SCO and OS/Makefile-SCO_SV that put basename,
5729 chown and chgrp in /bin and hostname in /usr/bin.
5731 28. Exim was keeping the "process log" file open after each use, just as it
5732 does for the main log. This opens the possibility of it remaining open for
5733 long periods when the USR1 signal hits a daemon. Occasional processlog
5734 errors were reported, that could have been caused by this. Anyway, it seems
5735 much more sensible not to leave this file open at all, so that is what now
5738 29. The long-running daemon process does not normally write to the log once it
5739 has entered its main loop, and it closes the log before doing so. This is
5740 so that log files can straightforwardly be renamed and moved. However,
5741 there are a couple of unusual error situations where the daemon does write
5742 log entries, and I had neglected to close the log afterwards.
5744 30. The text of an SMTP error response that was received during a remote
5745 delivery was being truncated at 512 bytes. This is too short for some of
5746 the long messages that one sometimes sees. I've increased the limit to
5749 31. It is now possible to make retry rules that apply only when a message has a
5750 specific sender, in particular, an empty sender.
5752 32. Added "control = enforce_sync" and "control = no_enforce_sync". This makes
5753 it possible to be selective about when SMTP synchronization is enforced.
5755 33. Added "control = caseful_local_part" and "control = "caselower_local_part".
5757 32. Implemented hosts_connection_nolog.
5759 33. Added an ACL for QUIT.
5761 34. Setting "delay_warning=" to disable warnings was not working; it gave a
5764 35. Added mailbox_size and mailbox_filecount to appendfile.
5766 36. Added control = no_multiline_responses to ACLs.
5768 37. There was a bug in the logic of the code that waits for the clock to tick
5769 in the case where the clock went backwards by a substantial amount such
5770 that the microsecond fraction of "now" was more than the microsecond
5771 fraction of "then" (but the whole seconds number was less).
5773 38. Added support for the libradius Radius client library this is found on
5774 FreeBSD (previously only the radiusclient library was supported).
5780 1. When certain lookups returned multiple values in the form name=value, the
5781 quoting of the values was not always being done properly. Specifically:
5782 (a) If the value started with a double quote, but contained no whitespace,
5784 (b) If the value contained whitespace other than a space character (i.e.
5785 tabs or newlines or carriage returns) it was not quoted.
5786 This fix has been applied to the mysql and pgsql lookups by writing a
5787 separate quoting function and calling it from the lookup code. The fix
5788 should probably also be applied to nisplus, ibase and oracle lookups, but
5789 since I cannot test any of those, I have not disturbed their existing code.
5791 2. A hit in the callout cache for a specific address caused a log line with no
5792 reason for rejecting RCPT. Now it says "Previous (cached) callout
5793 verification failure".
5795 3. There was an off-by-one bug in the queryprogram router. An over-long
5796 return line was truncated at 256 instead of 255 characters, thereby
5797 overflowing its buffer with the terminating zero. As well as fixing this, I
5798 have increased the buffer size to 1024 (and made a note to document this).
5800 4. If an interrupt, such as the USR1 signal that is send by exiwhat, arrives
5801 when Exim is waiting for an SMTP response from a remote server, Exim
5802 restarts its select() call on the socket, thereby resetting its timeout.
5803 This is not a problem when such interrupts are rare. Somebody set up a cron
5804 job to run exiwhat every 2 minutes, which is less than the normal select()
5805 timeout (5 or 10 minutes). This meant that the select() timeout never
5806 kicked in because it was always reset. I have fixed this by comparing the
5807 time when an interrupt arrives with the time at the start of the first call
5808 to select(). If more time than the timeout has elapsed, the interrupt is
5809 treated as a timeout.
5811 5. Some internal re-factoring in preparation for the addition of Sieve
5812 extensions (by MH). In particular, the "personal" test is moved to a
5813 separate function, and given an option for scanning Cc: and Bcc: (which is
5814 not set for Exim filters).
5816 6. When Exim created an email address using the login of the caller as the
5817 local part (e.g. when creating a From: or Sender: header line), it was not
5818 quoting the local part when it contained special characters such as @.
5820 7. Installed new OpenBSD configuration files.
5822 8. Reworded some messages for syntax errors in "and" and "or" conditions to
5823 try to make them clearer.
5825 9. Callout options, other than the timeout value, were being ignored when
5826 verifying sender addresses in header lines. For example, when using
5828 verify = header_sender/callout=no_cache
5830 the cache was (incorrectly) being used.
5832 10. Added a missing instance of ${EXE} to the exim_install script; this affects
5833 only the Cygwin environment.
5835 11. When return_path_on_delivery was set as a log selector, if different remote
5836 addresses in the same message used different return paths and parallel
5837 remote delivery occurred, the wrong values would sometimes be logged.
5838 (Whenever a remote delivery process finished, the return path value from
5839 the most recently started remote delivery process was logged.)
5841 12. RFC 3848 specifies standard names for the "with" phrase in Received: header
5842 lines when AUTH and/or TLS are in use. This is the "received protocol"
5843 field. Exim used to use "asmtp" for authenticated SMTP, without any
5844 indication (in the protocol name) for TLS use. Now it follows the RFC and
5845 uses "esmtpa" if the connection is authenticated, "esmtps" if it is
5846 encrypted, and "esmtpsa" if it is both encrypted and authenticated. These
5847 names appear in log lines as well as in Received: header lines.
5849 13. Installed MH's patches for Sieve to add the "copy" and "vacation"
5850 extensions, and comparison tests, and to fix some bugs.
5852 14. Changes to the "personal" filter test:
5854 (1) The test was buggy in that it was just doing the equivalent of
5855 "contains" tests on header lines. For example, if a user's address was
5856 anne@some.where, the "personal" test would incorrectly be true for
5858 To: susanne@some.where
5860 This test is now done by extracting each address from the header in turn,
5861 and checking the entire address. Other tests that are part of "personal"
5862 are now done using regular expressions (for example, to check local parts
5863 of addresses in From: header lines).
5865 (2) The list of non-personal local parts in From: addresses has been
5866 extended to include "listserv", "majordomo", "*-request", and "owner-*",
5867 taken from the Sieve specification recommendations.
5869 (3) If the message contains any header line starting with "List-" it is
5870 treated as non-personal.
5872 (4) The test for "circular" in the Subject: header line has been removed
5873 because it now seems ill-conceived.
5875 15. Minor typos in src/EDITME comments corrected.
5877 16. Installed latest exipick from John Jetmore.
5879 17. If headers_add on a router specified a text string that was too long for
5880 string_sprintf() - that is, longer than 8192 bytes - Exim panicked. The use
5881 of string_sprintf() is now avoided.
5883 18. $message_body_size was not set (it was always zero) when running the DATA
5884 ACL and the local_scan() function.
5886 19. For the "mail" command in an Exim filter, no default was being set for
5887 the once_repeat time, causing a random time value to be used if "once" was
5888 specified. (If the value happened to be <= 0, no repeat happened.) The
5889 default is now 0s, meaning "never repeat". The "vacation" command was OK
5890 (its default is 7d). It's somewhat surprising nobody ever noticed this bug
5891 (I found it when inspecting the code).
5893 20. There is now an overall timeout for performing a callout verification. It
5894 defaults to 4 times the callout timeout, which applies to individual SMTP
5895 commands during the callout. The overall timeout applies when there is more
5896 than one host that can be tried. The timeout is checked before trying the
5897 next host. This prevents very long delays if there are a large number of
5898 hosts and all are timing out (e.g. when the network connections are timing
5899 out). The value of the overall timeout can be changed by specifying an
5900 additional sub-option for "callout", called "maxwait". For example:
5902 verify = sender/callout=5s,maxwait=20s
5904 21. Add O_APPEND to the open() call for maildirsize files (Exim already seeks
5905 to the end before writing, but this should make it even safer).
5907 22. Exim was forgetting that it had advertised PIPELINING for the second and
5908 subsequent messages on an SMTP connection. It was also not resetting its
5909 memory on STARTTLS and an internal HELO.
5911 23. When Exim logs an SMTP synchronization error within a session, it now
5912 records whether PIPELINING has been advertised or not.
5914 24. Added 3 instances of "(long int)" casts to time_t variables that were being
5915 formatted using %ld, because on OpenBSD (and perhaps others), time_t is int
5916 rather than long int.
5918 25. Installed the latest Cygwin configuration files from the Cygwin maintainer.
5920 26. Added the never_mail option to autoreply.
5926 1. A reorganization of the code in order to implement 4.40/8 caused a daemon
5927 crash if the getsockname() call failed; this can happen if a connection is
5928 closed very soon after it is established. The problem was simply in the
5929 order in which certain operations were done, causing Exim to try to write
5930 to the SMTP stream before it had set up the file descriptor. The bug has
5931 been fixed by making things happen in the correct order.
5937 1. If "drop" was used in a DATA ACL, the SMTP output buffer was not flushed
5938 before the connection was closed, thus losing the rejection response.
5940 2. Commented out the definition of SOCKLEN_T in os.h-SunOS5. It is needed for
5941 some early Solaris releases, but causes trouble in current releases where
5942 socklen_t is defined.
5944 3. When std{in,out,err} are closed, re-open them to /dev/null so that they
5947 4. Minor refactoring of os.c-Linux to avoid compiler warning when IPv6 is not
5950 5. Refactoring in expand.c to improve memory usage. Pre-allocate a block so
5951 that releasing the top of it at the end releases what was used for sub-
5952 expansions (unless the block got too big). However, discard this block if
5953 the first thing is a variable or header, so that we can use its block when
5954 it is dynamic (useful for very large $message_headers, for example).
5956 6. Lookups now cache *every* query, not just the most recent. A new, separate
5957 store pool is used for this. It can be recovered when all lookup caches are
5958 flushed. Lookups now release memory at the end of their result strings.
5959 This has involved some general refactoring of the lookup sources.
5961 7. Some code has been added to the store_xxx() functions to reduce the amount
5962 of flapping under certain conditions.
5964 8. log_incoming_interface used to affect only the <= reception log lines. Now
5965 it causes the local interface and port to be added to several more SMTP log
5966 lines, for example "SMTP connection from", and rejection lines.
5968 9. The Sieve author supplied some patches for the doc/README.SIEVE file.
5970 10. Added a conditional definition of _BSD_SOCKLEN_T to os.h-Darwin.
5972 11. If $host_data was set by virtue of a hosts lookup in an ACL, its value
5973 could be overwritten at the end of the current message (or the start of a
5974 new message if it was set in a HELO ACL). The value is now preserved for
5975 the duration of the SMTP connection.
5977 12. If a transport had a headers_rewrite setting, and a matching header line
5978 contained an unqualified address, that address was qualified, even if it
5979 did not match any rewriting rules. The underlying bug was that the values
5980 of the flags that permit the existence of unqualified sender and recipient
5981 addresses in header lines (set by {sender,recipient}_unqualified_hosts for
5982 non-local messages, and by -bnq for local messages) were not being
5983 preserved with the message after it was received.
5985 13. When Exim was logging an SMTP synchronization error, it could sometimes log
5986 "next input=" as part of the text comprising the host identity instead of
5987 the correct text. The code was using the same buffer for two different
5988 strings. However, depending on which order the printing function evaluated
5989 its arguments, the bug did not always show up. Under Linux, for example, my
5990 test suite worked just fine.
5992 14. Exigrep contained a use of Perl's "our" scoping after change 4.31/70. This
5993 doesn't work with some older versions of Perl. It has been changed to "my",
5994 which in any case is probably the better facility to use.
5996 15. A really picky compiler found some instances of statements for creating
5997 error messages that either had too many or two few arguments for the format
6000 16. The size of the buffer for calls to the DNS resolver has been increased
6001 from 1024 to 2048. A larger buffer is needed when performing PTR lookups
6002 for addresses that have a lot of PTR records. This alleviates a problem; it
6003 does not fully solve it.
6005 17. A dnsdb lookup for PTR records that receives more data than will fit in the
6006 buffer now truncates the list and logs the incident, which is the same
6007 action as happens when Exim is looking up a host name and its aliases.
6008 Previously in this situation something unpredictable would happen;
6009 sometimes it was "internal error: store_reset failed".
6011 18. If a server dropped the connection unexpectedly when an Exim client was
6012 using GnuTLS and trying to read a response, the client delivery process
6013 crashed while trying to generate an error log message.
6015 19. If a "warn" verb in an ACL added multiple headers to a message in a single
6016 string, for example:
6018 warn message = H1: something\nH2: something
6020 the text was added as a single header line from Exim's point of view
6021 though it ended up OK in the delivered message. However, searching for the
6022 second and subsequent header lines using $h_h2: did not work. This has been
6023 fixed. Similarly, if a system filter added multiple headers in this way,
6024 the routers could not see them.
6026 20. Expanded the error message when iplsearch is called with an invalid key to
6027 suggest using net-iplsearch in a host list.
6029 21. When running tests using -bh, any delays imposed by "delay" modifiers in
6030 ACLs are no longer actually imposed (and a message to that effect is
6033 22. If a "gecos" field in a passwd entry contained escaped characters, in
6034 particular, if it contained a \" sequence, Exim got it wrong when building
6035 a From: or a Sender: header from that name. A second bug also caused
6036 incorrect handling when an unquoted " was present following a character
6037 that needed quoting.
6039 23. "{crypt}" as a password encryption mechanism for a "crypteq" expansion item
6040 was not being matched caselessly.
6042 24. Arranged for all hyphens in the exim.8 source to be escaped with
6045 25. Change 16 of 4.32, which reversed 71 or 4.31 didn't quite do the job
6046 properly. Recipient callout cache records were still being keyed to include
6047 the sender, even when use_sender was set false. This led to far more
6048 callouts that were necessary. The sender is no longer included in the key
6049 when use_sender is false.
6051 26. Added "control = submission" modifier to ACLs.
6053 27. Added the ${base62d: operator to decode base 62 numbers.
6055 28. dnsdb lookups can now access SRV records.
6057 29. CONFIGURE_OWNER can be set at build time to define an alternative owner for
6058 the configuration file.
6060 30. The debug message "delivering xxxxxx-xxxxxx-xx" is now output in verbose
6061 (-v) mode. This makes the output for a verbose queue run more intelligible.
6063 31. Added a use_postmaster feature to recipient callouts.
6065 32. Added the $body_zerocount variable, containing the number of binary zero
6066 bytes in the message body.
6068 33. The time of last modification of the "new" subdirectory is now used as the
6069 "mailbox time last read" when there is a quota error for a maildir
6072 34. Added string comparison operators lt, lti, le, lei, gt, gti, ge, gei.
6074 35. Added +ignore_unknown as a special item in host lists.
6076 36. Code for decoding IPv6 addresses in host lists is now included, even if
6077 IPv6 support is not being compiled. This fixes a bug in which an IPv6
6078 address was recognized as an IP address, but was then not correctly decoded
6079 into binary, causing unexpected and incorrect effects when compared with
6086 1. Very minor rewording of debugging text in manualroute to say "list of
6087 hosts" instead of "hostlist".
6089 2. If verify=header_syntax was set, and a header line with an unqualified
6090 address (no domain) and a large number of spaces between the end of the
6091 name and the colon was received, the reception process suffered a buffer
6092 overflow, and (when I tested it) crashed. This was caused by some obsolete
6093 code that should have been removed. The fix is to remove it!
6095 3. When running in the test harness, delay a bit after writing a bounce
6096 message to get a bit more predictability in the log output.
6098 4. Added a call to search_tidyup() just before forking a reception process. In
6099 theory, someone could use a lookup in the expansion of smtp_accept_max_
6100 per_host which, without the tidyup, could leave open a database connection.
6102 5. Added the variables $recipient_data and $sender_data which get set from a
6103 lookup success in an ACL "recipients" or "senders" condition, or a router
6104 "senders" option, similar to $domain_data and $local_part_data.
6106 6. Moved the writing of debug_print from before to after the "senders" test
6109 7. Change 4.31/66 (moving the time when the Received: is generated) caused
6110 problems for message scanning, either using a data ACL, or using
6111 local_scan() because the Received: header was not generated till after they
6112 were called (in order to set the time as the time of reception completion).
6113 I have revised the way this works. The header is now generated after the
6114 body is received, but before the ACL or local_scan() are called. After they
6115 are run, the timestamp in the header is updated.
6121 1. Change 4.24/6 introduced a bug because the SIGALRM handler was disabled
6122 before starting a queue runner without re-exec. This happened only when
6123 deliver_drop_privilege was set or when the Exim user was set to root. The
6124 effect of the bug was that timeouts during subsequent deliveries caused
6125 crashes instead of being properly handled. The handler is now left at its
6126 default (and expected) setting.
6128 2. The other case in which a daemon avoids a re-exec is to deliver an incoming
6129 message, again when deliver_drop_privilege is set or Exim is run as root.
6130 The bug described in (1) was not present in this case, but the tidying up
6131 of the other signals was missing. I have made the two cases consistent.
6133 3. The ignore_target_hosts setting on a manualroute router was being ignored
6134 for hosts that were looked up using the /MX notation.
6136 4. Added /ignore=<ip list> feature to @mx_any, @mx_primary, and @mx_secondary
6139 5. Change 4.31/55 was buggy, and broke when there was a rewriting rule that
6140 operated on the sender address. After changing the $sender_address to <>
6141 for the sender address verify, Exim was re-instated it as the original
6142 (before rewriting) address, but remembering that it had rewritten it, so it
6143 wasn't rewriting it again. This bug also had the effect of breaking the
6144 sender address verification caching when the sender address was rewritten.
6146 6. The ignore_target_hosts option was being ignored by the ipliteral router.
6147 This has been changed so that if the ip literal address matches
6148 ignore_target_hosts, the router declines.
6150 7. Added expansion conditions match_domain, match_address, and match_local_
6151 part (NOT match_host).
6153 8. The placeholder for the Received: header didn't have a length field set.
6155 9. Added code to Exim itself and to exim_lock to test for a specific race
6156 condition that could lead to file corruption when using MBX delivery. The
6157 issue is with the lockfile that is created in /tmp. If this file is removed
6158 after a process has opened it but before that process has acquired a lock,
6159 there is the potential for a second process to recreate the file and also
6160 acquire a lock. This could lead to two Exim processes writing to the file
6161 at the same time. The added code performs the same test as UW imapd; it
6162 checks after acquiring the lock that its file descriptor still refers to
6163 the same named file.
6165 10. The buffer for building added header lines was of fixed size, 8192 bytes.
6166 It is now parameterized by HEADER_ADD_BUFFER_SIZE and this can be adjusted
6169 11. Added the smtp_active_hostname option. If used, this will typically be made
6170 to depend on the incoming interface address. Because $interface_address is
6171 not set up until the daemon has forked a reception process, error responses
6172 that can happen earlier (such as "too many connections") no longer contain
6175 12. If an expansion in a condition on a "warn" statement fails because a lookup
6176 defers, the "warn" statement is abandoned, and the next ACL statement is
6177 processed. Previously this caused the whole ACL to be aborted.
6179 13. Added the iplsearch lookup type.
6181 14. Added ident_timeout as a log selector.
6183 15. Added tls_certificate_verified as a log selector.
6185 16. Added a global option tls_require_ciphers (compare the smtp transport
6186 option of the same name). This controls incoming TLS connections.
6188 17. I finally figured out how to make tls_require_ciphers do a similar thing
6189 in GNUtls to what it does in OpenSSL, that is, set up an appropriate list
6190 before starting the TLS session.
6192 18. Tabs are now shown as \t in -bP output.
6194 19. If the log selector return_path_on_delivery was set, Exim crashed when
6195 bouncing a message because it had too many Received: header lines.
6197 20. If two routers both had headers_remove settings, and the first one included
6198 a superfluous trailing colon, the final name in the first list and the
6199 first name in the second list were incorrectly joined into one item (with a
6200 colon in the middle).
6206 1. Added -C and -D options to the exinext utility, mainly to make it easier
6207 to include in the automated testing, but these could be helpful when
6208 multiple configurations are in use.
6210 2. The exinext utility was not formatting the output nicely when there was
6211 an alternate port involved in the retry record key, nor when there was a
6212 message id as well (for retries that were specific to a specific message
6213 and a specific host). It was also confused by IPv6 addresses, because of
6214 the additional colons they contain. I have fixed the IPv4 problem, and
6215 patched it up to do a reasonable job for IPv6.
6217 3. When there is an error after a MAIL, RCPT, or DATA SMTP command during
6218 delivery, the log line now contains "pipelined" if PIPELINING was used.
6220 4. An SMTP transport process used to panic and die if the bind() call to set
6221 an explicit outgoing interface failed. This has been changed; it is now
6222 treated in the same way as a connect() failure.
6224 5. A reference to $sender_host_name in the part of a conditional expansion
6225 that was being skipped was still causing a DNS lookup. This no longer
6228 6. The def: expansion condition was not recognizing references to header lines
6229 that used bh_ and bheader_.
6231 7. Added the _cache feature to named lists.
6233 8. The code for checking quota_filecount in the appendfile transport was
6234 allowing one more file than it should have been.
6236 9. For compatibility with Sendmail, the command line option
6244 and sets the incoming protocol and host name (for trusted callers). The
6245 host name and its colon can be omitted when only the protocol is to be set.
6246 Note the Exim already has two private options, -pd and -ps, that refer to
6247 embedded Perl. It is therefore impossible to set a protocol value of "d" or
6248 "s", but I don't think that's a major issue.
6250 10. A number of refactoring changes to the code, none of which should affect
6253 (a) The number of logging options was getting close to filling up the
6254 32-bit word that was used as a bit map. I have split them into two classes:
6255 those that are passed in the argument to log_write(), and those that are
6256 only ever tested independently outside of that function. These are now in
6257 separate 32-bit words, so there is plenty of room for expansion again.
6258 There is no change in the user interface or the logging behaviour.
6260 (b) When building, for example, log lines, the code previously used a
6261 macro that called string_cat() twice, in order to add two strings. This is
6262 not really sufficiently general. Furthermore, there was one instance where
6263 it was actually wrong because one of the argument was used twice, and in
6264 one call a function was used. (As it happened, calling the function twice
6265 did not affect the overall behaviour.) The macro has been replaced by a
6266 function that can join an arbitrary number of extra strings onto a growing
6269 (c) The code for expansion conditions now uses a table and a binary chop
6270 instead of a serial search (which was left over from when there were very
6271 few conditions). Also, it now recognizes conditions like "pam" even when
6272 the relevant support is not compiled in: a suitably worded error message is
6273 given if an attempt is made to use such a condition.
6275 11. Added ${time_interval:xxxxx}.
6277 12. A bug was causing one of the ddress fields not to be passed back correctly
6278 from remote delivery subprocesses. The field in question was not being
6279 subsequently used, so this caused to problems in practice.
6281 13. Added new log selectors queue_time and deliver_time.
6283 14. Might have fixed a bug in maildirsizefile handling that threw up
6284 "unexpected character" debug warnings, and recalculated the data
6285 unnecessarily. In any case, I expanded the warning message to give more
6288 15. Added the message "Restricted characters in address" to the statements in
6289 the default ACL that block characters like @ and % in local parts.
6291 16. Change 71 for release 4.31 proved to be much less benign that I imagined.
6292 Three changes have been made:
6294 (a) There was a serious bug; a negative response to MAIL caused the whole
6295 recipient domain to be cached as invalid, thereby blocking all messages
6296 to all local parts at the same domain, from all senders. This bug has
6297 been fixed. The domain is no longer cached after a negative response to
6298 MAIL if the sender used is not empty.
6300 (b) The default behaviour of using MAIL FROM:<> for recipient callouts has
6303 (c) A new callout option, "use_sender" has been added for people who want
6304 the modified behaviour.
6310 1. Removed "EXTRALIBS=-lwrap" from OS/Makefile-Unixware7 on the advice of
6313 2. Removed "LIBS = -lresolv" from OS/Makefile-Darwin as it is not needed, and
6314 indeed breaks things for older releases.
6316 3. Added additional logging to the case where there is a problem reading data
6317 from a filter that is running in a subprocess using a pipe, in order to
6318 try to track down a specific problem.
6320 4. Testing facility fudge: when running in the test harness and attempting
6321 to connect to 10.x.x.x (expecting a connection timeout) I'm now sometimes
6322 getting "No route to host". Convert this to a timeout.
6324 5. Define ICONV_ARG2_TYPE as "char **" for Unixware7 to avoid compiler
6327 6. Some OS don't have socklen_t but use size_t instead. This affects the
6328 fifth argument of getsockopt() amongst other things. This is now
6329 configurable by a macro called SOCKLEN_T which defaults to socklen_t, but
6330 can be set for individual OS. I have set it for SunOS5, OSF1, and
6331 Unixware7. Current versions of SunOS5 (aka Solaris) do have socklen_t, but
6332 some earlier ones do not.
6334 7. Change 4.30/15 was not doing the test caselessly.
6336 8. The standard form for an IPv6 address literal was being rejected by address
6337 parsing in, for example, MAIL and RCPT commands. An example of this kind of
6338 address is [IPv6:2002:c1ed:8229:10:202:2dff:fe07:a42a]. Exim now accepts
6339 this, as well as the form without the "IPv6" on the front (but only when
6340 address literals are enabled, of course).
6342 9. Added some casts to avoid compiler warnings in OS/os.c-Linux.
6344 10. Exim crashed if a message with an empty sender address specified by -f
6345 encountered a router with an errors_to setting. This could be provoked only
6346 by a command such as
6350 where an empty string was supplied; "<>" did not hit this bug.
6352 11. Installed PCRE release 4.5.
6354 12. If EHLO/HELO was rejected by an ACL, the value of $sender_helo_name
6355 remained set. It is now erased.
6357 13. exiqgrep wasn't working on MacOS X because it didn't correctly compute
6358 times from message ids (which are base 36 rather than the normal 62).
6360 14. "Expected" SMTP protocol errors that can arise when PIPELINING is in use
6361 were being counted as actual protocol errors, and logged if the log
6362 selector +smtp_protocol_error was set. One cannot be perfect in this test,
6363 but now, if PIPELINING has been advertised, RCPT following a rejected MAIL,
6364 and DATA following a set of rejected RCPTs do not count as protocol errors.
6365 In other words, Exim assumes they were pipelined, though this may not
6366 actually be the case. Of course, in all cases the client gets an
6367 appropriate error code.
6369 15. If a lookup fails in an ACL condition, a message about the failure may
6370 be available; it is used if testing the ACL cannot continue, because most
6371 such messages specify what the cause of the deferral is. However, some
6372 messages (e.g. "MYSQL: no data found") do not cause a defer. There was bug
6373 that caused an old message to be retained and used if a later statement
6374 caused a defer, replacing the real cause of the deferral.
6376 16. If an IP address had so many PTR records that the DNS lookup buffer
6377 was not large enough to hold them, Exim could crash while trying to process
6378 the truncated data. It now detects and logs this case.
6380 17. Further to 4.21/58, another change has been made: if (and only if) the
6381 first line of a message (the first header line) ends with CRLF, a bare LF
6382 in a subsequent header line has a space inserted after it, so as not to
6383 terminate the header.
6385 18. Refactoring: tidied an ugly bit of code in appendfile that copied data
6386 unnecessarily, used atoi() instead of strtol(), and didn't check the
6387 termination when getting file sizes from file names by regex.
6389 19. Completely re-implemented the support for maildirsize files, in the light
6390 of a number of problems with the previous contributed implementation
6391 (4.30/29). In particular:
6393 . If the quota is zero, the maildirsize file is maintained, but no quota is
6396 . If the maildir directory does not exist, it is created before any attempt
6397 to write a maildirsize file.
6399 . The quota value in the file is just a cache; if the quota is changed in
6400 the transport, the new value overrides.
6402 . A regular expression is available for excluding directories from the
6405 20. The autoreply transport checks the characters in options that define the
6406 message's headers; it allows continued headers, but it was checking with
6407 isspace() after an embedded newline instead of explicitly looking for a
6410 21. If all the "regular" hosts to which an address was routed had passed their
6411 expiry times, and had not reached their retry times, the address was
6412 bounced, even if fallback hosts were defined. Now Exim should go on to try
6415 22. Increased buffer sizes in the callout code from 1024 to 4096 to match the
6416 equivalent code in the SMTP transport. Some hosts send humungous responses
6417 to HELO/EHLO, more than 1024 it seems.
6419 23. Refactoring: code in filter.c used (void *) for "any old type" but this
6420 gives compiler warnings in some environments. I've now done it "properly",
6423 24. The replacement for inet_ntoa() that is used with gcc on IRIX systems
6424 (because of problems with the built-in one) was declared to return uschar *
6425 instead of char *, causing compiler failure.
6427 25. Fixed a file descriptor leak when processing alias/forward files.
6429 26. Fixed a minor format string issue in dbfn.c.
6431 27. Typo in exim.c: ("dmbnz" for "dbmnz").
6433 28. If a filter file refered to $h_xxx or $message_headers, and the headers
6434 contained RFC 2047 "words", Exim's memory could, under certain conditions,
6437 29. When a sender address is verified, it is cached, to save repeating the test
6438 when there is more than one recipient in a message. However, when the
6439 verification involves a callout, it is possible for different callout
6440 options to be set for different recipients. It is too complicated to keep
6441 track of this in the cache, so now Exim always runs a verification when a
6442 callout is required, relying on the callout cache for the optimization.
6443 The overhead is duplication of the address routing, but this should not be
6446 30. Fixed a bug in callout caching. If a RCPT command caused the sender address
6447 to be verified with callout=postmaster, and the main callout worked but the
6448 postmaster check failed, the verification correctly failed. However, if a
6449 subsequent RCPT command asked for sender verification *without* the
6450 postmaster check, incorrect caching caused this verification also to fail,
6453 31. Exim caches DNS lookup failures so as to avoid multiple timeouts; however,
6454 it was not caching the DNS options (qualify_single, search_parents) that
6455 were used when the lookup failed. A subsequent lookup with different
6456 options therefore always gave the same answer, though there were cases
6457 where it should not have. (Example: a "domains = !$mx_any" option on a
6458 dnslookup router: the "domains" option is always processed without any
6459 widening, but the router might have qualify_single set.) Now Exim uses the
6460 cached value only when the same options are set.
6462 32. Added John Jetmore's "exipick" utility to the distribution.
6464 33. GnuTLS: When an attempt to start a TLS session fails for any reason other
6465 than a timeout (e.g. a certificate is required, and is not provided), an
6466 Exim server now closes the connection immediately. Previously it waited for
6467 the client to close - but if the client is SSL, it seems that they each
6468 wait for each other, leading to a delay before one of them times out.
6470 34: GnuTLS: Updated the code to use the new GnuTLS 1.0.0 API. I have not
6471 maintained 0.8.x compatibility because I don't think many are using it, and
6472 it is clearly obsolete.
6474 35. Added TLS support for CRLs: a tls_crl global option and one for the smtp
6477 36. OpenSSL: $tls_certificate_verified was being set to 1 even if the
6478 client certificate was expired. A simple patch fixes this, though I don't
6479 understand the full logic of why the verify callback is called multiple
6482 37. OpenSSL: a patch from Robert Roselius: "Enable client-bug workaround.
6483 Versions of OpenSSL as of 0.9.6d include a 'CBC countermeasure' feature,
6484 which causes problems with some clients (such as the Certicom SSL Plus
6485 library used by Eudora). This option, SSL_OP_DONT_INSERT_EMPTY_FRAGMENTS,
6486 disables the coutermeasure allowing Eudora to connect."
6488 38. Exim was not checking that a write() to a log file succeeded. This could
6489 lead to Bad Things if a log got too big, in particular if it hit a file
6490 size limit. Exim now panics and dies if it cannot write to a log file, just
6491 as it does if it cannot open a log file.
6493 39. Modified OS/Makefile-Linux so that it now contains
6495 CFLAGS=-O -D_FILE_OFFSET_BITS=64 -D_LARGEFILE_SOURCE
6497 The two -D definitions ensure that Exim is compiled with large file
6498 support, which makes it possible to handle log files that are bigger than
6501 40. Fixed a subtle caching bug: if (in an ACL or a set of routers, for
6502 instance) a domain was checked against a named list that involved a lookup,
6503 causing $domain_data to be set, then another domain was checked against the
6504 same list, then the first domain was re-checked, the value of $domain_data
6505 after the final check could be wrong. In particular, if the second check
6506 failed, it could be set empty. This bug probably also applied to
6509 41. The strip_trailing_dot option was not being applied to the address given
6510 with the -f command-line option.
6512 42. The code for reading a message's header from the spool was incrementing
6513 $received_count, but never initializing it. This meant that the value was
6514 incorrect (doubled) while delivering a message in the same process in which
6515 it was received. In the most common configuration of Exim, this never
6516 happens - a fresh exec is done - but it can happen when
6517 deliver_drop_privilege is set.
6519 43. When Exim logs an SMTP synchronization error - client data sent too soon -
6520 it now includes up to 150 characters of the unexpected data in the log
6523 44. The exim_dbmbuild utility uses fixed size buffers for reading input lines
6524 and building data strings. The size of both of these buffers was 10 000
6525 bytes - far larger than anybody would *ever* want, thought I. Needless to
6526 say, somebody hit the limit. I have increased the maximum line length to
6527 20 000 and the maximum data length of concatenated lines to 100 000. I have
6528 also fixed two bugs, because there was no checking on these buffers. Tsk,
6529 tsk. Now exim_dbmbuild gives a message and exits with an error code if a
6530 buffer is too small.
6532 45. The exim_dbmbuild utility did not support quoted keys, as Exim does in
6533 lsearch lookups. Now it does.
6535 46. When parsing a route_list item in a manualroute router, a fixed-length
6536 buffer was used for the list of hosts. I made this 1024 bytes long,
6537 thinking that nobody would ever have a list of hosts that long. Wrong.
6538 Somebody had a whole pile of complicated expansion conditions, and the
6539 string was silently truncated, leading to an expansion error. It turns out
6540 that it is easier to change to an unlimited length (owing to other changes
6541 that have happened since this code was originally written) than to build
6542 structure for giving a limitation error. The length of the item that
6543 expands into the list of hosts is now unlimited.
6545 47. The lsearch lookup could not handle data where the length of text line was
6546 more than 4095 characters. Such lines were truncated, leading to shortened
6547 data being returned. It should now handle lines of any length.
6549 48. Minor wording revision: "cannot test xxx in yyy ACL" becomes "cannot test
6550 xxx condition in yyy ACL" (e.g. "cannot test domains condition in DATA
6553 49. Cosmetic tidy to scripts like exicyclog that are generated by globally
6554 replacing strings such as BIN_DIRECTORY in a source file: the replacement
6555 no longer happens in comment lines. A list of replacements is now placed
6556 at the head of all of the source files, except those whose only change is
6557 to replace PERL_COMMAND in the very first #! line.
6559 50. Replaced the slow insertion sort in queue.c, for sorting the list of
6560 messages on the queue, with a bottom-up merge sort, using code contributed
6561 by Michael Haardt. This should make operations like -bp somewhat faster on
6562 large queues. It won't affect queue runners, except when queue_run_in_order
6565 51. Installed eximstats 1.31 in the distribution.
6567 52. Added support for SRV lookups to the dnslookup router.
6569 53. If an ACL referred to $message_body or $message_body_end, the value was not
6570 reset for any messages that followed in the same SMTP session.
6572 54. The store-handling optimization for building very long strings was not
6573 differentiating between the different store pools. I don't think this
6574 actually made any difference in practice, but I've tidied it.
6576 55. While running the routers to verify a sender address, $sender_address
6577 was still set to the sender address. This is wrong, because when routing to
6578 send a bounce to the sender, it would be empty. Therefore, I have changed
6579 it so that, while verifying a sender address, $sender_address is set to <>.
6580 (There is no change to what happens when verifying a recipient address.)
6582 56. After finding MX (or SRV) records, Exim was doing a DNS lookup for the
6583 target A or AAAA records (if not already returned) without resetting the
6584 qualify_single or search_parents options of the DNS resolver. These are
6585 inappropriate in this case because the targets of MX and SRV records must
6586 be FQDNs. A broken DNS record could cause trouble if it happened to have a
6587 target that, when qualified, matched something in the local domain. These
6588 two options are now turned off when doing these lookups.
6590 57. It seems that at least some releases of Reiserfs (which does not have the
6591 concept of a fixed number of inodes) returns zero and not -1 for the
6592 number of available inodes. This interacted badly with check_spool_inodes,
6593 which assumed that -1 was the "no such thing" setting. What I have done is
6594 to check that the total number of inodes is greater than zero before doing
6595 the test of how many are available.
6597 58. When a "warn" ACL statement has a log_message modifier, the message is
6598 remembered, and not repeated. This is to avoid a lot of repetition when a
6599 message has many recipients that cause the same warning to be written.
6600 However, Exim was preserving the list of already written lines for an
6601 entire SMTP session, which doesn't seem right. The memory is now reset if a
6602 new message is started.
6604 59. The "rewrite" debugging flag was not showing the result of rewriting in the
6605 debugging output unless log_rewrite was also set.
6607 60. Avoid a compiler warning on 64-bit systems in dsearch.c by avoiding the use
6608 of (int)(handle) when we know that handle contains (void *)(-1).
6610 61. The Exim daemon panic-logs an error return when it closes the incoming
6611 connection. However "connection reset by peer" seems to be common, and
6612 isn't really an error worthy of noting specially, so that particular error
6615 62. When Exim is trying to find all the local interfaces, it used to panic and
6616 die if the ioctl to get the interface flags failed. However, it seems that
6617 on at least one OS (Solaris 9) it is possible to have an interface that is
6618 included in the list of interfaces, but for which you get a failure error
6619 for this call. This happens when the interface is not "plumbed" into a
6620 protocol (i.e. neither IPv4 nor IPv6). I've changed the code so that a
6621 failure of the "get flags" call assumes that the interface is down.
6623 63. Added a ${eval10: operator, which assumes all numbers are decimal. This
6624 makes life easier for people who are doing arithmetic on fields extracted
6625 from dates, where you often get leading zeros that should not be
6626 interpreted as octal.
6628 64. Added qualify_domain to the redirect router, to override the global
6631 65. If a pathologically long header line contained very many addresses (the
6632 report of this problem mentioned 10 000) and each of them was rewritten,
6633 Exim could use up a very large amount of memory. (It kept on making new
6634 copies of the header line as it rewrote, and never released the old ones.)
6635 At the expense of a bit more processing, the header rewriting function has
6636 been changed so that it no longer eats memory in this way.
6638 66. The generation of the Received: header has been moved from the time that a
6639 message starts to be received, to the time that it finishes. The timestamp
6640 in the Received: header should now be very close to that of the <= log
6641 line. There are two side-effects of this change:
6643 (a) If a message is rejected by a DATA or non-SMTP ACL or local_scan(), the
6644 logged header lines no longer include the local Received: line, because
6645 it has not yet been created. The same applies to a copy of the message
6646 that is returned to a non-SMTP sender when a message is rejected.
6648 (b) When a filter file is tested using -bf, no additional Received: header
6649 is added to the test message. After some thought, I decided that this
6652 This change does not affect the value of $received_for. It is still set
6653 after address rewriting, but before local_scan() is called.
6655 67. Installed the latest Cygwin-specific files from the Cygwin maintainer.
6657 68. GnuTLS: If an empty file is specified for tls_verify_certificates, GnuTLS
6658 gave an unhelpful panic error message, and a defer error. I have managed to
6659 change this behaviour so that it now rejects any supplied certificate,
6660 which seems right, as the list of acceptable certificates is empty.
6662 69. OpenSSL: If an empty file is specified for tls_verify_certificates, OpenSSL
6663 gave an unhelpful defer error. I have not managed to make this reject any
6664 supplied certificates, but the error message it gives is "no certificate
6665 supplied", which is not helpful.
6667 70. exigrep's output now also includes lines that are not associated with any
6668 message, but which match the given pattern. Implemented by a patch from
6669 Martin Sluka, which also tidied up the Perl a bit.
6671 71. Recipient callout verification, like sender verification, was using <> in
6672 the MAIL FROM command. This isn't really the right thing, since the actual
6673 sender may affect whether the remote host accepts the recipient or not. I
6674 have changed it to use the actual sender in the callout; this means that
6675 the cache record is now keyed on a recipient/sender pair, not just the
6676 recipient address. There doesn't seem to be a real danger of callout loops,
6677 since a callout by the remote host to check the sender would use <>.
6678 [SEE ABOVE: changed after hitting problems.]
6680 72. Exim treats illegal SMTP error codes that do not begin with 4 or 5 as
6681 temporary errors. However, in the case of such a code being given after
6682 the end of a data transmission (i.e. after ".") Exim was failing to write
6683 a retry record for the message. (Yes, there was some broken host that was
6684 actually sending 8xx at this point.)
6686 73. An unknown lookup type in a host list could cause Exim to panic-die when
6687 the list was checked. (An example that provoked this was putting <; in the
6688 middle of a list instead of at the start.) If this happened during a DATA
6689 ACL check, a -D file could be left lying around. This kind of configuration
6690 error no longer causes Exim to die; instead it causes a defer error. The
6691 incident is still logged to the main and panic logs.
6693 74. Buglet left over from Exim 3 conversion. The message "too many messages
6694 in one connection" was written to the rejectlog but not the mainlog, except
6695 when address rewriting (yes!) was being logged.
6697 75. Added write_rejectlog option.
6699 76. When a system filter was run not as root (that is, when system_filter_user
6700 was set), the values of the $n variables were not being returned to the
6701 main process; thus, they were not subsequently available in the $sn
6704 77. Added +return_path_on_delivery log selector.
6706 78. A connection timeout was being treated differently from recipients deferred
6707 when testing hosts_max_try with a message that was older than the host's
6708 retry timeout. (The host should not be counted, thus allowing all hosts to
6709 be tried at least once before bouncing.) This may have been the cause of an
6710 occasionally reported bug whereby a message would remain on the queue
6711 longer than the retry timeout, but would be bounced if a delivery was
6712 forced. I say "may" because I never totally pinned down the problem;
6713 setting up timeout/retry tests is difficult. See also the next item.
6715 79. The ultimate address timeout was not being applied to errors that involved
6716 a combination of host plus message (for example, a timeout on a MAIL
6717 command). When an address resolved to a number of possible hosts, and they
6718 were not all tried for each delivery (e.g. because of hosts_max_try), a
6719 message could remain on the queue longer than the retry timeout.
6721 80. Sieve bug: "stop" inside "elsif" was broken. Applied a patch from Michael
6724 81. Fixed an obscure SMTP outgoing bug which required at least the following
6725 conditions: (a) there was another message waiting for the same server;
6726 (b) the server returned 5xx to all RCPT commands in the first message so
6727 that the message was not completed; (c) the server dropped the connection
6728 or gave a negative response to the RSET that Exim sends to abort the
6729 transaction. The observed case was a dropped connection after DATA that had
6730 been sent in pipelining mode. That is, the server had advertised PIPELINING
6731 but was not implementing it correctly. The effect of the bug was incorrect
6732 behaviour, such as trying another host, and this could lead to a crash.
6738 1. The 3rd arguments to getsockname(), getpeername(), and accept() in exim.c
6739 and daemon.c were passed as pointers to ints; they should have been
6740 pointers to socklen_t variables (which are typically unsigned ints).
6742 2. Some signed/unsigned type warnings in the os.c file for Linux have been
6745 3. Fixed a really odd bug that affected only the testing scheme; patching a
6746 certain fixed string in the binary changed the value of another string that
6747 happened to be identical to the end of the original first string.
6749 4. When gethostbyname() (or equivalent) is passed an IP address as a "host
6750 name", it returns that address as the IP address. On some operating
6751 systems (e.g. Solaris), it also passes back the IP address string as the
6752 "host name". However, on others (e.g. Linux), it passes back an empty
6753 string. Exim wasn't checking for this, and was changing the host name to an
6754 empty string, assuming it had been canonicalized.
6756 5. Although rare, it is permitted to have more than one PTR record for a given
6757 IP address. I thought that gethostbyaddr() or getipnodebyaddr() always gave
6758 all the names associated with an address, because they do in Solaris.
6759 However, it seems that they do not in Linux for data that comes from the
6760 DNS. If an address in /etc/hosts has multiple names, they _are_ all given.
6761 I found this out when I moved to a new Linux workstation and tried to run
6762 the Exim test suite.
6764 To get round this problem I have changed the code so that it now does its
6765 own call to the DNS to look up PTR records when searching for a host name.
6766 If nothing can be found in the DNS, it tries gethostbyaddr(), so that
6767 addresses that are only in /etc/hosts are still found.
6769 This behaviour is, however, controlled by an option called host_lookup_
6770 order, which defaults to "bydns:byaddr". If people want to use the other
6771 order, or indeed, just use one or the other means of lookup, they can
6772 specify it in this variable.
6774 6. If a PTR record yields an empty name, Exim treats it as non-existent. In
6775 some operating systems, this comes back from gethostbyaddr() as an empty
6776 string, and this is what Exim used to test for. However, it seems that in
6777 other systems, "." is yielded. Exim now tests for this case too.
6779 7. The values of check_spool_space and check_log_space are now held internally
6780 as a number of kilobytes instead of an absolute number of bytes. If a
6781 numbers is specified without 'K' or 'M', it is rounded up to the nearest
6782 kilobyte. This means that much larger values can be stored.
6784 8. Exim monitor: an attempt to get the action menu when not actually pointing
6785 at a message produces an empty menu entitled "No message selected". This
6786 works on Solaris (OpenWindows). However, XFree86 does not like a menu with
6787 no entries in it ("Shell widget menu has zero width and/or height"). So I
6788 have added a single, blank menu entry in this case.
6790 9. Added ${quote_local_part.
6792 10. MIME decoding is now applied to the contents of Subject: header lines when
6795 11. Now that a reference to $sender_host_address automatically causes a reverse
6796 lookup to occur if necessary (4.13/18), there is no need to arrange for a
6797 host lookup before query-style lookups in lists that might use this
6798 variable. This has therefore been abolished, and the "net-" prefix is no
6799 longer necessary for query-style lookups.
6801 12. The Makefile for SCO_SV contained a setting of LDFLAGS. This appears to
6802 have been a typo for LFLAGS, so it has been changed.
6804 13. The install script calls Exim with "-C /dev/null" in order to find the
6805 version number. If ALT_CONFIG_PREFIX was set, this caused an error message
6806 to be output. However, since Exim outputs its version number before the
6807 error, it didn't break the script. It just looked ugly. I fixed this by
6808 always allowing "-C /dev/null" if the caller is root.
6810 14. Ignore overlarge ACL variable number when reading spool file - insurance
6811 against a later release with more variables having written the file.
6813 15. The standard form for an IPv6 address literal was being rejected by EHLO.
6814 Example: [IPv6:2002:c1ed:8229:10:202:2dff:fe07:a42a]. Exim now accepts
6815 this, as well as the form without the "IPv6" on the front.
6817 16. Added CHOWN_COMMAND=/usr/sbin/chown and LIBS=-lresolv to the
6818 OS/Makefile-Darwin file.
6820 17. Fixed typo in lookups/ldap.c: D_LOOKUP should be D_lookup. This applied
6821 only to LDAP libraries that do not have LDAP_OPT_DEREF.
6823 18. After change 4.21/52, "%ld" was used to format the contents of the $inode
6824 variable. However, some OS use ints for inodes. I've added cast to long int
6825 to get rid of the compiler warning.
6827 19. I had forgotten to lock out "/../" in configuration file names when
6828 ALT_CONFIG_PREFIX was set.
6830 20. Routers used for verification do not need to specify transports. However,
6831 if such a router generated a host list, and callout was configured, Exim
6832 crashed, because it could not find a port number from the (non-existent)
6833 transport. It now assumes port 25 in this circumstance.
6835 21. Added the -t option to exigrep.
6837 22. If LOOKUP_LSEARCH is defined, all three linear search methods (lsearch,
6838 wildlsearch, nwildlsearch) are compiled. LOOKUP_WILDLSEARCH and LOOKUP_
6839 NWILDLSEARCH are now obsolete, but retained for compatibility. If either of
6840 them is set, LOOKUP_LSEARCH is forced.
6842 23. "exim -bV" now outputs a list of lookups that are included in the binary.
6844 24. Added sender and host information to the "rejected by local_scan()" log
6845 line; previously there was no indication of these.
6847 25. Added .include_if_exists.
6849 26. Change 3.952/11 added an explicit directory sync on top of a file sync for
6850 Linux. It turns out that not all file systems support this. Apparently some
6851 versions of NFS do not. (It's rare to put Exim's spool on NFS, but people
6852 do it.) To cope with this, the error EINVAL, which means that sync-ing is
6853 not supported on the file descriptor, is now ignored when Exim is trying to
6854 sync a directory. This applies only to Linux.
6856 27. Added -DBIND_8_COMPAT to the CLFAGS setting for Darwin.
6858 28. In Darwin (MacOS X), the PAM headers are in /usr/include/pam and not in
6859 /usr/include/security. There's now a flag in OS/os.h-Darwin to cope with
6862 29. Added support for maildirsize files from supplied patch (modified a bit).
6864 30. The use of :fail: followed by an empty string could lead Exim to respond to
6865 sender verification failures with (e.g.):
6867 550 Verification failed for <xxx>
6868 550 Sender verify failed
6870 where the first response line was missing the '-' that indicates it is not
6871 the final line of the response.
6873 31. The loop for finding the name of the user that called Exim had a hardwired
6874 limit of 10; it now uses the value of finduser_retries, which is used for
6875 all other user lookups.
6877 32. Added $received_count variable, available in data and not_smtp ACLs, and at
6880 33. Exim was neglecting to zero errno before one call of strtol() when
6881 expanding a string and expecting an integer value. On some systems this
6882 resulted in spurious "integer overflow" errors. Also, it was casting the
6883 result into an int without checking.
6885 34. Testing for a connection timeout using "timeout_connect" in the retry rules
6886 did not work. The code looks as if it has *never* worked, though it appears
6887 to have been documented since at least release 1.62. I have made it work.
6889 35. The "timeout_DNS" error in retry rules, also documented since at least
6890 1.62, also never worked. As it isn't clear exactly what this means, and
6891 clearly it isn't a major issue, I have abolished the feature by treating it
6892 as "timeout", and writing a warning to the main and panic logs.
6894 36. The display of retry rules for -brt wasn't always showing the error code
6897 37. Added new error conditions to retry rules: timeout_A, timeout_MX,
6898 timeout_connect_A, timeout_connect_MX.
6900 38. Rewriting the envelope sender at SMTP time did not allow it to be rewritten
6901 to the empty sender.
6903 39. The daemon was not analysing the content of -oX till after it had closed
6904 stderr and disconnected from the controlling terminal. This meant that any
6905 syntax errors were only noted on the panic log, and the return code from
6906 the command was 0. By re-arranging the code a little, I've made the
6907 decoding happen first, so such errors now appear on stderr, and the return
6908 code is 1. However, the actual setting up of the sockets still happens in
6909 the disconnected process, so errors there are still only recorded on the
6912 40. A daemon listener on a wildcard IPv6 socket that also accepts IPv4
6913 connections (as happens on some IP stacks) was logged at start up time as
6914 just listening for IPv6. It now logs "IPv6 with IPv4". This differentiates
6915 it from "IPv6 and IPv4", which means that two separate sockets are being
6918 41. The debug output for gethostbyname2() or getipnodebyname() failures now
6919 says whether AF_INET or AF_INET6 was passed as an argument.
6921 42. Exiwhat output was messed up when time zones were included in log
6924 43. Exiwhat now gives more information about the daemon's listening ports,
6925 and whether -tls-on-connect was used.
6927 44. The "port" option of the smtp transport is now expanded.
6929 45. A "message" modifier in a "warn" statement in a non-message ACL was being
6930 silently ignored. Now an error message is written to the main and panic
6933 46. There's a new ACL modifier called "logwrite" which writes to a log file
6934 as soon as it is encountered.
6936 47. Added $local_user_uid and $local_user_gid at routing time.
6938 48. Exim crashed when trying to verify a sender address that was being
6941 49. Exim was recognizing only a space character after ".include". It now also
6942 recognizes a tab character.
6944 50. Fixed several bugs in the Perl script that creates the exim.8 man page by
6945 extracting the relevant information from the specification. The man page no
6946 longer contains scrambled data for the -d option, and I've added a section
6947 at the front about calling Exim under different names.
6949 51. Added "extra_headers" argument to the "mail" command in filter files.
6951 52. Redirecting mail to an unqualified address in a Sieve filter caused Exim to
6954 53. Installed eximstats 1.29.
6956 54. Added transport_filter_timeout as a generic transport option.
6958 55. Exim no longer adds an empty Bcc: header to messages that have no To: or
6959 Cc: header lines. This was required by RFC 822, but it not required by RFC
6962 56. Exim used to add From:, Date:, and Message-Id: header lines to any
6963 incoming messages that did not have them. Now it does so only if the
6964 message originates locally, that is, if there is no associated remote host
6965 address. When Resent- header lines are present, this applies to the Resent-
6966 lines rather than the non-Resent- lines.
6968 57. Drop incoming SMTP connection after too many syntax or protocol errors. The
6969 limit is controlled by smtp_max_synprot_errors, defaulting to 3.
6971 58. Messages for configuration errors now include the name of the main
6972 configuration file - useful now that there may be more than one file in a
6973 list (.included file names were always shown).
6975 59. Change 4.21/82 (run initgroups() when starting the daemon) causes problems
6976 for those rare installations that do not start the daemon as root or run it
6977 setuid root. I've cut out the call to initgroups() if the daemon is not
6980 60. The Exim user and group can now be bound into the binary as text strings
6981 that are looked up at the start of Exim's processing.
6983 61. Applied a small patch for the Interbase code, supplied by Ard Biesheuvel.
6985 62. Added $mailstore_basename variable.
6987 63. Installed patch to sieve.c from Michael Haardt.
6989 64. When Exim failed to open the panic log after failing to open the main log,
6990 the original message it was trying to log was written to stderr and debug
6991 output, but if they were not available (the usual case in production), it
6992 was lost. Now it is written to syslog before the two lines that record the
6993 failures to open the logs.
6995 65. Users' Exim filters run in subprocesses under the user's uid. It is
6996 possible for a "deliver" command or an alias in a "personal" command to
6997 provoke an address rewrite. If logging of address rewriting is configured,
6998 this fails because the process is not running as root or exim. There may be
6999 a better way of dealing with this, but for the moment (because 4.30 needs
7000 to be released), I have disabled address rewrite logging when running a
7001 filter in a non-root, non-exim process.
7007 1. The buildconfig auxiliary program wasn't quoting the value set for
7008 HEADERS_CHARSET. This caused a compilation error complaining that 'ISO' was
7009 not defined. This bug was masked in 4.22 by the effect that was fixed in
7012 2. Some messages that were rejected after a message id was allocated were
7013 shown as "incomplete" by exigrep. It no longer does this for messages that
7014 are rejected by local_scan() or the DATA or non-SMTP ACLs.
7016 3. If a Message-ID: header used a domain literal in the ID, and Exim did not
7017 have allow_domain_literals set, the ID did not get logged in the <= line.
7018 Domain literals are now always recognized in Message-ID: header lines.
7020 4. The first argument for a ${extract expansion item is the key name or field
7021 number. Leading and trailing spaces in this item were not being ignored,
7022 causing some misleading effects.
7024 5. When deliver_drop_privilege was set, single queue runner processes started
7025 manually (i.e. by the command "exim -q") or by the daemon (which uses the
7026 same command in the process it spins off) were not dropping privilege.
7028 6. When the daemon running as "exim" started a queue runner, it always
7029 re-executed Exim in the spun-off process. This is a waste of effort when
7030 deliver_drop_privilege is set. The new process now just calls the
7031 queue-runner function directly.
7037 1. Typo in the src/EDITME file: it referred to HEADERS_DECODE_TO instead of
7040 2. Change 4.21/73 introduced a bug. The pid file path set by -oP was being
7041 ignored. Though the use of -oP was forcing the writing of a pid file, it
7042 was always written to the default place.
7044 3. If the message "no IP address found for host xxxx" is generated during
7045 incoming verification, it is now followed by identification of the incoming
7046 connection (so you can more easily find what provoked it).
7048 4. Bug fix for Sieve filters: "stop" inside a block was not working properly.
7050 5. Added some features to "harden" Exim a bit more against certain attacks:
7052 (a) There is now a build-time option called FIXED_NEVER_USERS that can
7053 be put in Local/Makefile. This is like the never_users runtime option,
7054 but it cannot be overridden. The default setting is "root".
7056 (b) If ALT_CONFIG_PREFIX is defined in Local/Makefile, it specifies a
7057 prefix string with which any file named in a -C command line option
7060 (c) If ALT_CONFIG_ROOT_ONLY is defined in Local/Makefile, root privilege
7061 is retained for -C and -D only if the caller of Exim is root. Without
7062 it, the exim user may also use -C and -D and retain privilege.
7064 (d) If DISABLE_D_OPTION is defined in Local/Makefile, the use of the -D
7065 command line option is disabled.
7067 6. Macro names set by the -D option must start with an upper case letter, just
7068 like macro names defined in the configuration file.
7070 7. Added "dereference=" facility to LDAP.
7072 8. Two instances of the typo "uknown" in the source files are fixed.
7074 9. If a PERL_COMMAND setting in Local/Makefile was not at the start of a line,
7075 the Configure-Makefile script screwed up while processing it.
7077 10. Incorporated PCRE 4.4.
7079 11. The SMTP synchronization check was not operating right at the start of an
7080 SMTP session. For example, it could not catch a HELO sent before the client
7081 waited for the greeting. There is now a check for outstanding input at the
7082 point when the greeting is written. Because of the duplex, asynchronous
7083 nature of TCP/IP, it cannot be perfect - the incorrect input may be on its
7084 way, but not yet received, when the check is performed.
7086 12. Added tcp_nodelay to make it possible to turn of the setting of TCP_NODELAY
7087 on TCP/IP sockets, because this apparently causes some broken clients to
7090 13. Installed revised OS/Makefile-CYGWIN and OS/os.c-cygwin (the .h file was
7091 unchanged) from the Cygwin maintainer.
7093 14. The code for -bV that shows what is in the binary showed "mbx" when maildir
7094 was supported instead of testing for mbx. Effectively a typo.
7096 15. The spa authenticator server code was not checking that the input it
7097 received was valid base64.
7099 16. The debug output line for the "set" modifier in ACLs was not showing the
7100 name of the variable that was being set.
7102 17. Code tidy: the variable type "vtype_string" was never used. Removed it.
7104 18. Previously, a reference to $sender_host_name did not cause a DNS reverse
7105 lookup on its own. Something else was needed to trigger the lookup. For
7106 example, a match in host_lookup or the need for a host name in a host list.
7107 Now, if $sender_host_name is referenced and the host name has not yet been
7108 looked up, a lookup is performed. If the lookup fails, the variable remains
7109 empty, and $host_lookup_failed is set to "1".
7111 19. Added "eqi" as a case-independent comparison operator.
7113 20. The saslauthd authentication condition could segfault if neither service
7114 nor realm was specified.
7116 21. If an overflowing value such as "2048M" was set for message_size_limit, the
7117 error message that was logged was misleading, and incoming SMTP
7118 connections were dropped. The message is now more accurate, and temporary
7119 errors are given to SMTP connections.
7121 22. In some error situations (such as 21 above) Exim rejects all SMTP commands
7122 (except RSET) with a 421 error, until QUIT is received. However, it was
7123 failing to send a response to QUIT.
7125 23. The HELO ACL was being run before the code for helo_try_verify_hosts,
7126 which made it impossible to use "verify = helo" in the HELO ACL. The HELO
7127 ACL is now run after the helo_try_verify_hosts code.
7129 24. "{MD5}" and "{SHA1}" are now recognized as equivalent to "{md5"} and
7130 "{sha1}" in the "crypteq" expansion condition (in fact the comparison is
7131 case-independent, so other case variants are also recognized). Apparently
7132 some systems use these upper case variants.
7134 25. If more than two messages were waiting for the same host, and a transport
7135 filter was specified for the transport, Exim sent two messages over the
7136 same TCP/IP connection, and then failed with "socket operation on non-
7137 socket" when it tried to send the third.
7139 26. Added Exim::debug_write and Exim::log_write for embedded Perl use.
7141 27. The extern definition of crypt16() in expand.c was not being excluded when
7142 the OS had its own crypt16() function.
7144 28. Added bounce_return_body as a new option, and bounce_return_size_limit
7145 as a preferred synonym for return_size_limit, both as an option and as an
7148 29. Added LIBS=-liconv to OS/Makefile-OSF1.
7150 30. Changed the default configuration ACL to relax the local part checking rule
7151 for addresses that are not in any local domains. For these addresses,
7152 slashes and pipe symbols are allowed within local parts, but the sequence
7153 /../ is explicitly forbidden.
7155 31. SPA server authentication was not clearing the challenge buffer before
7158 32. log_message in a "warn" ACL statement was writing to the reject log as
7159 well as to the main log, which contradicts the documentation and doesn't
7160 seem right (because no rejection is happening). So I have stopped it.
7162 33. Added Ard Biesheuvel's lookup code for accessing an Interbase database.
7163 However, I am unable to do any testing of this.
7165 34. Fixed an infelicity in the appendfile transport. When checking directories
7166 for a mailbox, to see if any needed to be created, it was accidentally
7167 using path names with one or more superfluous leading slashes; tracing
7168 would show up entries such as stat("///home/ph10", 0xFFBEEA48).
7170 35. If log_message is set on a "discard" verb in a MAIL or RCPT ACL, its
7171 contents are added to the log line that is written for every discarded
7172 recipient. (Previously a log_message setting was ignored.)
7174 36. The ${quote: operator now quotes the string if it is empty.
7176 37. The install script runs exim in order to find its version number. If for
7177 some reason other than non-existence or emptiness, which it checks, it
7178 could not run './exim', it was installing it with an empty version number,
7179 i.e. as "exim-". This error state is now caught, and the installation is
7182 38. An argument was missing from the function that creates an error message
7183 when Exim fails to connect to the socket for saslauthd authentication.
7184 This could cause Exim to crash, or give a corrupted message.
7186 39. Added isip, isip4, and isip6 to ${if conditions.
7188 40. The ACL variables $acl_xx are now saved with the message, and can be
7189 accessed later in routers, transports, and filters.
7191 41. The new lookup type nwildlsearch is like wildlsearch, except that the key
7192 strings in the file are not string-expanded.
7194 42. If a MAIL command specified a SIZE value that was too large to fit into an
7195 int variable, the check against message_size_limit failed. Such values are
7196 now forced to INT_MAX, which is around 2Gb for a 32-bit variable. Maybe one
7197 day this will have to be increased, but I don't think I want to be around
7198 when emails are that large.
7205 1. Removed HAVE_ICONV=yes from OS/Makefile-FreeBSD, since it seems that
7206 iconv() is not standard in FreeBSD.
7208 2. Change 4.21/17 was buggy and could cause stack overwriting on a system with
7209 IPv6 enabled. The observed symptom was a segmentation fault on return from
7210 the function os_common_find_running_interfaces() in src/os.c.
7212 3. In the check_special_case() function in daemon.c I had used "errno" as an
7213 argument name, which causes warnings on some systems. This was basically a
7214 typo, since it was named "eno" in the comments!
7216 4. The code that waits for the clock to tick (at a resolution of some fraction
7217 of a second) so as to ensure message-id uniqueness was always waiting for
7218 at least one whole tick, when it could have waited for less. [This is
7219 almost certainly not relevant at current processor speeds, where it is
7220 unlikely to ever wait at all. But we try to future-proof.]
7222 5. The function that sleeps for a time interval that includes fractions of a
7223 second contained a race. It did not block SIGALRM between setting the
7224 timer, and suspending (a couple of lines later). If the interval was short
7225 and the sigsuspend() was delayed until after it had expired, the suspension
7226 never ended. On busy systems this could lead to processes getting stuck for
7229 6. Some uncommon configurations may cause a lookup to happen in a queue runner
7230 process, before it forks any delivery processes. The open lookup caching
7231 mechanism meant that the open file or database connection was passed into
7232 the delivery process. The problem was that delivery processes always tidy
7233 up cached lookup data. This could cause a problem for the next delivery
7234 process started by the queue runner, because the external queue runner
7235 process does not know about the closure. So the next delivery process
7236 still has data in the lookup cache. In the case of a file lookup, there was
7237 no problem because closing a file descriptor in a subprocess doesn't affect
7238 the parent. However, if the lookup was caching a connection to a database,
7239 the connection was closed, and the second delivery process was likely to
7240 see errors such as "PGSQL: query failed: server closed the connection
7241 unexpectedly". The problem has been fixed by closing all cached lookups
7242 in a queue runner before running a delivery process.
7244 7. Compiler warning on Linux for the second argument of iconv(), which doesn't
7245 seem to have the "const" qualifier which it has on other OS. I've
7248 8. Change 4.21/2 was too strict. It is only if there are two authenticators
7249 *of the same type* (client or server) with the same public name that an
7250 error should be diagnosed.
7252 9. When Exim looked up a host name for an IP address, but failed to find the
7253 original IP address when looking up the host name (a safety check), it
7254 output the message "<ip address> does not match any IP for NULL", which was
7255 confusing, to say the least. The bug was that the host name should have
7256 appeared instead of "NULL".
7258 10. Since release 3.03, if Exim is called by a uid other than root or the Exim
7259 user that is built into the binary, and the -C or -D options is used, root
7260 privilege is dropped before the configuration file is read. In addition,
7261 logging is switched to stderr instead of the normal log files. If the
7262 configuration then re-defines the Exim user, the unprivileged environment
7263 is probably not what is expected, so Exim logs a panic warning message (but
7266 However, if deliver_drop_privilege is set, the unprivileged state may well
7267 be exactly what is intended, so the warning has been cut out in that case,
7268 and Exim is allowed to try to write to its normal log files.
7274 1. smtp_return_error_details was not giving details for temporary sender
7275 or receiver verification errors.
7277 2. Diagnose a configuration error if two authenticators have the same public
7280 3. Exim used not to create the message log file for a message until the first
7281 delivery attempt. This could be confusing when incoming messages were held
7282 for policy or load reasons. The message log file is now created at the time
7283 the message is received, and an initial "Received" line is written to it.
7285 4. The automatically generated man page for command line options had a minor
7286 bug that caused no ill effects; however, a more serious problem was that
7287 the procedure for building the man page automatically didn't always
7288 operate. Consequently, release 4.20 contains an out-of-date version. This
7289 shouldn't happen again.
7291 5. When building Exim with embedded Perl support, the script that builds the
7292 Makefile was calling 'perl' to find its compile-time parameters, ignoring
7293 any setting of PERL_COMMAND in Local/Makefile. This is now fixed.
7295 6. The freeze_tell option was not being used for messages that were frozen on
7296 arrival, either by an ACL or by local_scan().
7298 7. Added the smtp_incomplete_transaction log selector.
7300 8. After STARTTLS, Exim was not forgetting that it had advertised AUTH, so it
7301 was accepting AUTH without a new EHLO.
7303 9. Added tls_remember_esmtp to cope with YAEB. This allows AUTH and other
7304 ESMTP extensions after STARTTLS without a new EHLO, in contravention of the
7307 10. Logging of TCP/IP connections (when configured) now happens in the main
7308 daemon process instead of the child process, so that the TCP/IP connection
7309 count is more accurate (but it can never be perfect).
7311 11. The use of "drop" in a nested ACL was not being handled correctly in the
7312 outer ACL. Now, if condition failure induced by the nested "drop" causes
7313 the outer ACL verb to deny access ("accept" or "discard" after "endpass",
7314 or "require"), the connection is dropped.
7316 12. Similarly, "discard" in a nested ACL wasn't being handled. A nested ACL
7317 that yield "discard" can now be used with an "accept" or a "discard" verb,
7318 but an error is generated for any others (because I can't see a useful way
7319 to define what should happen).
7321 13. When an ACL is read dynamically from a file (or anywhere else), the lines
7322 are now processed in the same way as lines in the Exim configuration file.
7323 In particular, continuation lines are supported.
7325 14. Added the "dnslists = a.b.c!=n.n.n.n" feature.
7327 15. Added -ti meaning -t -i.
7329 16. Check for letters, digits, hyphens, and dots in the names of dnslist
7330 domains, and warn by logging if others are found.
7332 17. At least on BSD, alignment is not guaranteed for the array of ifreq's
7333 returned from GIFCONF when Exim is trying to find the list of interfaces on
7334 a host. The code in os.c has been modified to copy each ifreq to an aligned
7335 structure in all cases.
7337 Also, in some cases, the returned ifreq's were being copied to a 'struct
7338 ifreq' on the stack, which was subsequently passed to host_ntoa(). That
7339 means the last couple of bytes of an IPv6 address could be chopped if the
7340 ifreq contained only a normal sockaddr (14 bytes storage).
7342 18. Named domain lists were not supported in the hosts_treat_as_local option.
7343 An entry such as +xxxx was not recognized, and was treated as a literal
7346 19. Ensure that header lines added by a DATA ACL are included in the reject log
7347 if the ACL subsequently rejects the message.
7349 20. Upgrade the cramtest.pl utility script to use Digest::MD5 instead of just
7350 MD5 (which is deprecated).
7352 21. When testing a filter file using -bf, Exim was writing a message when it
7353 took the sender from a "From " line in the message, but it was not doing so
7354 when it took $return_path from a Return-Path: header line. It now does.
7356 22. If the contents of a "message" modifier for a "warn" ACL verb do not begin
7357 with a valid header line field name (a series of printing characters
7358 terminated by a colon, Exim now inserts X-ACL-Warn: at the beginning.
7360 23. Changed "disc" in the source to "disk" to conform to the documentation and
7361 the book and for uniformity.
7363 24. Ignore Sendmail's -Ooption=value command line item.
7365 25. When execve() failed while trying to run a command in a pipe transport,
7366 Exim was returning EX_UNAVAILABLE (69) from the subprocess. However, this
7367 could be confused with a return value of 69 from the command itself. This
7368 has been changed to 127, the value the shell returns if it is asked to run
7369 a non-existent command. The wording for the related log line suggests a
7370 non-existent command as the problem.
7372 26. If received_header_text expands to an empty string, do not add a Received:
7373 header line to the message. (Well, it adds a token one on the spool, but
7374 marks it "old" so that it doesn't get used or transmitted.)
7376 27. Installed eximstats 1.28 (addition of -nt option).
7378 28. There was no check for failure on the call to getsockname() in the daemon
7379 code. This can fail if there is a shortage of resources on the system, with
7380 ENOMEM, for example. A temporary error is now given on failure.
7382 29. Contrary to the C standard, it seems that in some environments, the
7383 equivalent of setlocale(LC_ALL, "C") is not obeyed at the start of a C
7384 program. Exim now does this explicitly; it affects the formatting of
7385 timestamps using strftime().
7387 30. If exiqsumm was given junk data, it threw up some uninitialized variable
7388 complaints. I've now initialized all the variables, to avoid this.
7390 32. Header lines added by a system filter were not being "seen" during
7391 transport-time rewrites.
7393 33. The info_callback() function passed to OpenSSL is set up with type void
7394 (*)(SSL *, int, int), as described somewhere. However, when calling the
7395 function (actually a macro) that sets it up, the type void(*)() is
7396 expected. I've put in a cast to prevent warnings from picky compilers.
7398 34. If a DNS black list lookup found a CNAME record, but there were no A
7399 records associated with the domain it pointed at, Exim crashed.
7401 35. If a DNS black list lookup returned more than one A record, Exim ignored
7402 all but the first. It now scans all returned addresses if a particular IP
7403 value is being sought. In this situation, the contents of the
7404 $dnslist_value variable are a list of all the addresses, separated by a
7407 36. Tightened up the rules for host name lookups using reverse DNS. Exim used
7408 to accept a host name and all its aliases if the forward lookup for any of
7409 them yielded the IP address of the incoming connection. Now it accepts only
7410 those names whose forward lookup yields the correct IP address. Any other
7411 names are discarded. This closes a loophole whereby a rogue DNS
7412 administrator could create reverse DNS records to break through a
7413 wildcarded host restriction in an ACL.
7415 37. If a user filter or a system filter that ran in a subprocess used any of
7416 the numerical variables ($1, $2 etc), or $thisaddress, in a pipe command,
7417 the wrong values were passed to the pipe command ($thisaddress had the
7418 value of $0, $0 had the value of $1, etc). This bug was introduced by
7419 change 4.11/101, and not discovered because I wrote an inadequate test. :-(
7421 38. Improved the line breaking for long SMTP error messages from ACLs.
7422 Previously, if there was no break point between 40 and 75 characters, Exim
7423 left the rest of the message alone. Two changes have been made: (a) I've
7424 reduced the minimum length to 35 characters; (b) if it can't find a break
7425 point between 35 and 75 characters, it looks ahead and uses the first one
7426 that it finds. This may give the occasional overlong line, but at least the
7427 remaining text gets split now.
7429 39. Change 82 of 4.11 was unimaginative. It assumed the limit on the number of
7430 file descriptors might be low, and that setting 1000 would always raise it.
7431 It turns out that in some environments, the limit is already over 1000 and
7432 that lowering it causes trouble. So now Exim takes care not to decrease it.
7434 40. When delivering a message, the value of $return_path is set to $sender_
7435 address at the start of routing (routers may change the value). By an
7436 oversight, this default was not being set up when an address was tested by
7437 -bt or -bv, which affected the outcome if any router or filter referred to
7440 41. The idea of the "warn" ACL verb is that it adds a header or writes to the
7441 log only when "message" or "log_message" are set. However, if one of the
7442 conditions was an address verification, or a call to a nested ACL, the
7443 messages generated by the underlying test were being passed through. This
7444 no longer happens. The underlying message is available in $acl_verify_
7445 message for both "message" and "log_message" expansions, so it can be
7446 passed through if needed.
7448 42. Added RFC 2047 interpretation of header lines for $h_ expansions, with a
7449 new expansion $bh_ to give the encoded byte string without charset
7450 translation. Translation happens only if iconv() is available; HAVE_ICONV
7451 indicates this at build time. HEADERS_CHARSET gives the charset to
7452 translate to; headers_charset can change it in the configuration, and
7453 "headers charset" can change it in an individual filter file.
7455 43. Now that we have a default RFC 2047 charset (see above), the code in Exim
7456 that creates RFC 2047 encoded "words" labels them as that charset instead
7457 of always using iso-8859-1. The cases are (i) the explicit ${rfc2047:
7458 expansion operator; (ii) when Exim creates a From: line for a local
7459 message; (iii) when a header line is rewritten to include a "phrase" part.
7461 44. Nasty bug in exiqsumm: the regex to skip already-delivered addresses was
7462 buggy, causing it to skip the first lines of messages whose message ID
7463 ended in 'D'. This would not have bitten before Exim release 4.14, because
7464 message IDs were unlikely to end in 'D' before then. The effect was to have
7465 incorrect size information for certain domains.
7467 45. #include "config.h" was missing at the start of the crypt16.c module. This
7468 caused trouble on Tru64 (aka OSF1) systems, because HAVE_CRYPT16 was not
7471 46. If there was a timeout during a "random" callout check, Exim treated it as
7472 a failure of the random address, and carried on sending RSET and the real
7473 address. If the delay was just some slowness somewhere, the response to the
7474 original RCPT would be taken as a response to RSET and so on, causing
7475 mayhem of various kinds.
7477 47. Change 50 for 4.20 was a heap of junk. I don't know what I was thinking
7478 when I implemented it. It didn't allow for the fact that some option values
7479 may legitimately be negative (e.g. size_addition), and it didn't even do
7480 the right test for positive values.
7482 48. Domain names in DNS records are case-independent. Exim always looks them up
7483 in lower case. Some resolvers return domain names in exactly the case they
7484 appear in the zone file, that is, they may contain uppercase letters. Not
7485 all resolvers do this - some return always lower case. Exim was treating a
7486 change of case by a resolver as a change of domain, similar to a widening
7487 of a domain abbreviation. This triggered its re-routing code and so it was
7488 trying to route what was effectively the same domain again. This normally
7489 caused routing to fail (because the router wouldn't handle the domain
7490 twice). Now Exim checks for this case specially, and just changes the
7491 casing of the domain that it ultimately uses when it transmits the message
7494 49. Added Sieve (RFC 3028) support, courtesy of Michael Haardt's contributed
7497 50. If a filter generated a file delivery with a non-absolute name (possible if
7498 no home directory exists for the router), the forbid_file option was not
7501 51. Added '&' feature to dnslists, to provide bit mask matching in addition to
7502 the existing equality matching.
7504 52. Exim was using ints instead of ino_t variables in some places where it was
7505 dealing with inode numbers.
7507 53. If TMPDIR is defined in Local/Makefile (default in src/EDITME is
7508 TMPDIR="/tmp"), Exim checks for the presence of an environment variable
7509 called TMPDIR, and if it finds it is different, it changes its value.
7511 54. The smtp_printf() function is now made available to local_scan() so
7512 additional output lines can be written before returning. There is also an
7513 smtp_fflush() function to enable the detection of a dropped connection.
7514 The variables smtp_input and smtp_batched_input are exported to
7517 55. Changed the default runtime configuration: the message "Unknown user"
7518 has been removed from the ACL, and instead placed on the localuser router,
7519 using the cannot_route_message feature. This means that any verification
7520 failures that generate their own messages won't get overridden. Similarly,
7521 the "Unrouteable address" message that was in the ACL for unverifiable
7522 relay addresses has also been removed.
7524 56. Added hosts_avoid_esmtp to the smtp transport.
7526 57. The exicyclog script was not checking for the esoteric option
7527 CONFIGURE_FILE_USE_EUID in the Local/Makefile. It now does this, but it
7528 will work only if exicyclog is run under the appropriate euid.
7530 58. Following a discussion on the list, the rules by which Exim recognises line
7531 endings on incoming messages have been changed. The -dropcr and drop_cr
7532 options are now no-ops, retained only for backwards compatibility. The
7533 following line terminators are recognized: LF CRLF CR. However, special
7534 processing applies to CR:
7536 (i) The sequence CR . CR does *not* terminate an incoming SMTP message,
7537 nor a local message in the state where . is a terminator.
7539 (ii) If a bare CR is encountered in a header line, an extra space is added
7540 after the line terminator so as not to end the header. The reasoning
7541 behind this is that bare CRs in header lines are most likely either
7542 to be mistakes, or people trying to play silly games.
7544 59. The size of a message, as listed by "-bp" or in the Exim monitor window,
7545 was being incorrectly given as 18 bytes larger than it should have been.
7546 This is a VOB (very old bug).
7548 60. This may never have affected anything current, but just in case it has:
7549 When the local host is found other than at the start of a list of hosts,
7550 the local host, those with the same MX, and any that follow, are discarded.
7551 When the list in question was part of a longer list of hosts, the following
7552 hosts (not currently being processed) were also being discarded. This no
7553 longer happens. I'm not sure if this situation could ever has previously
7556 61. Added the "/MX" feature to lists of hosts in the manualroute and query
7559 62. Whenever Exim generates a new message, it now adds an Auto-Submitted:
7560 header. This is something that is recommended in a new Internet Draft, and
7561 is something that is documented as being done by Sendmail. There are two
7562 possible values. For messages generated by the autoreply transport, Exim
7565 Auto-Submitted: auto-replied
7567 whereas for all other generated messages (e.g. bounces) it adds
7569 Auto-Submitted: auto-generated
7571 63. The "personal" condition in filters now includes a test for the
7572 Auto-Submitted: header. If it contains the string "auto-" the message it
7573 not considered personal.
7575 64. Added rcpt_include_affixes as a generic transport option.
7577 65. Added queue_only_override (default true).
7579 66. Added the syslog_duplication option.
7581 67. If what should have been the first header line of a message consisted of
7582 a space followed by a colon, Exim was mis-interpreting it as a header line.
7583 It isn't of course - it is syntactically invalid and should therefore be
7584 treated as the start of the message body. The misbehaviour could have
7585 caused a number of strange effects, including loss of data in subsequent
7586 header lines, and spool format errors.
7588 68. Formerly, the AUTH parameter on a MAIL command was trusted only if the
7589 client host had authenticated. This control can now be exercised by an ACL
7590 for more flexibility.
7592 69. By default, callouts do not happen when testing with -bh. There is now a
7593 variant, -bhc, which does actually run the callout code, including
7594 consulting and updating the callout cache.
7596 70. Added support for saslauthd authentication, courtesy of Alexander
7599 71. If statvfs() failed on the spool or log directories while checking their
7600 size for availability, Exim confusingly gave the error "space shortage".
7601 Furthermore, in debugging mode it crashed with a floating point exception.
7602 These checks are done if check_{spool,log}_{space,inodes} are set, and when
7603 an SMTP message arrives with SIZE= on the MAIL command. As this is a really
7604 serious problem, Exim now writes to the main and panic logs when this
7605 happens, with details of the failure. It then refuses to accept the
7606 incoming message, giving the message "spool directory problem" or "log
7607 directory problem" with a 421 code for SMTP messages.
7609 72. When Exim is about to re-exec itself, it ensures that the file descriptors
7610 0, 1, and 2 exist, because some OS complain for execs without them (see
7611 ChangeLog 4.05/30). If necessary, Exim opens /dev/null to use for these
7612 descriptors. However, the code omitted to check that the open succeeded,
7613 causing mysterious errors if for some reason the permissions on /dev/null
7614 got screwed. Now Exim writes a message to the main and panic logs, and
7615 bombs out if it can't open /dev/null.
7617 73. Re-vamped the way daemon_smtp_port, local_interfaces, and -oX work and
7618 interact so that it is all more flexible. It is supposed to remain
7619 backwards compatible. Also added extra_local_interfaces.
7621 74. Invalid data sent to a SPA (NTLM) server authenticator could cause the code
7622 to bomb out with an assertion failure - to the client this appears as a
7623 connection drop. This problem occurs in the part of the code that was taken
7624 from the Samba project. Fortunately, the assertion is in a very simple
7625 function, so I have fixed this by reproducing the function inline in the
7626 one place where it is called, and arranging for authentication to fail
7627 instead of killing the process with assert().
7629 75. The SPA client code was not working when the server requested OEM rather
7630 than Unicode encoding.
7632 76. Added code to make require_files with a specific uid setting more usable in
7633 the case where statting the file as root fails - usually a non-root-mounted
7634 NFS file system. When this happens and the failure is EACCES, Exim now
7635 forks a subprocess and does the per-uid checking as the relevant uid.
7637 77. Added process_log_path.
7639 78. If log_file_path was not explicitly set, a setting of check_log_space or
7640 check_log_inodes was ignored.
7642 79. If a space check for the spool or log partitions fails, the incident is now
7643 logged. Of course, in the latter case the data may get lost...
7645 80. Added the %p formatting code to string_format() so that it can be used to
7646 print addresses in debug_print(). Adjusted all the address printing in the
7647 debugging in store.c to use %p rather than %d.
7649 81. There was a concern that a line of code in smtp_in.c could overflow a
7650 buffer if a HELO/EHLO command was given followed by 500 or so spaces. As
7651 initially expressed, the concern was not well-founded, because trailing
7652 spaces are removed early. However, if the trailing spaces were followed by
7653 a NULL, they did not get removed, so the overflow was possible. Two fixes
7656 (a) I re-wrote the offending code in a cleaner fashion.
7657 (b) If an incoming SMTP command contains a NULL character, it is rejected
7660 82. When Exim changes uid/gid to the Exim user at daemon start time, it now
7661 runs initgroups(), so that if the Exim user is in any additional groups,
7662 they will be used during message reception.
7668 The change log for 4.20 and earlier releases has been archived.
git://git.exim.org / exim.git / blob