1 This document describes *changes* to previous versions, that might
2 affect Exim's operation, with an unchanged configuration file. For new
3 options, and new features, see the NewStuff file next to this ChangeLog.
9 JH/01 Bug 1329: Fix format of Maildir-format filenames to match other mail-
10 related applications. Previously an "H" was used where available info
11 says that "M" should be, so change to match.
13 JH/02 Bug 2587: Fix pam expansion condition. Tainted values are commonly used
14 as arguments, so an implementation trying to copy these into a local
15 buffer was taking a taint-enforcement trap. Fix by using dynamically
16 created buffers. Similar fix for radius expansion condition.
18 JH/03 Bug 2586: Fix listcount expansion operator. Using tainted arguments is
19 reasonable, eg. to count headers. Fix by using dynamically created
20 buffers rather than a local. Do similar fixes for ACL actions "dcc",
21 "log_reject_target", "malware" and "spam"; the arguments are expanded
22 so could be handling tainted values.
24 JH/04 Bug 2590: Fix -bi (newaliases). A previous code rearrangement had
25 broken the (no-op) support for this sendmail command. Restore it
26 to doing nothing, silently, and returning good status.
28 JH/05 Bug 2593: Fix "vacation" in Exim filter. Previously, when a "once"
29 record path was given (or the default used) without a leading directory
30 path, an error occurred on trying to open it. Use the transport's working
33 JH/06 Bug 2594: Change the name used for certificate name checks in the smtp
34 transport. Previously it was the name on the DNS A-record; use instead
35 the head of the CNAME chain leading there (if there is one). This seems
36 to align better with RFC 6125.
38 JH/07 Bug 2597: Fix a resource leak. Using a lookup in obtaining a value for
39 smtp_accept_max_per_host allocated resources which were not released
40 when the limit was exceeded. This eventually crashed the daemon. Fix
41 by adding a relase action in that path.
43 JH/08 Bug 2598: Fix verify ACL condition. The options for the condition are
44 expanded; previously using tainted values was rejected. Fix by using
45 dynamically-created buffers.
47 JH/09 Relax restrictions on ACL verify condition needing access to message
48 headers. Previously they were only permitted in data and non-smtp ACLs;
49 permit also mime, dkim, prdr quit and notquit. Applies to header-syntax,
50 not_blind, header_sender and header_names_ascii verification.
52 JH/10 Bug 2603: Fix coding of string copying to only evaluate arguments once.
53 Previously a macro used one argument twice; when called with the
54 argument as an expression having side-effects, incorrect operation
55 resulted. Use an inlineable function.
57 JH/11 Bug 2604: Fix request to cutthrough-deliver when a connection is already
58 held open for a verify callout. Previously this wan not accounted for
59 and a corrupt onward SMTP conversation resulted.
61 JH/12 Bug 2607: Fix the ${srs_encode } expansion to handle quoted local_parts.
62 Previously they were embedded naively in the constructed address; when
63 needed, strip the quoting and quote the entire local_part.
64 Also make the inbound_srs expansion condition handle quoting.
66 JH/13 Fix dsearch "subdir" filter to ignore ".". Previously only ".." was
67 excluded, not matching the documentation.
69 JH/14 Bug 2606: Fix a segfault in sqlite lookups. When no, or a bad, filename
70 was given for the sqlite_dbfile a trap resulted.
72 JH/15 Bug 2620: Fix "spam" ACL condition. Previously, tainted values for the
73 "name" argument resulted in a trap. There is no reason to disallow such;
74 this was a coding error.
76 JH/16 Bug 2615: Fix pause during message reception, on systems that have been
77 suspended/resumed. The Linux CLOCK_MONOTONIC does not account for time
78 spent suspended, ignoring the Posix definition. Previously we assumed
79 it did and a constant offset from real time could be used as a correction.
80 Change to using the same clock source for the start-of-message and the
81 post-message next-tick-wait. Also change to using CLOCK_BOOTTIME if it
82 exists, just to get a clock slightly more aligned to reality.
84 JH/17 Bug 2295: Fix DKIM signing to always semicolon-terminate. Although the
85 RFC says it is optional some validators care. The missing char was not
86 intended but triggered by a line-wrap alignement. Discovery and fix by
87 Guillaume Outters, hacked on by JH.
89 JH/18 Bug 2617: Fix a taint trap in parse_fix_phrase(). Previously when the
90 name being quoted was tainted a trap would be taken. Fix by using
91 dynamicaly created buffers. The routine could have been called by a
92 rewrite with the "h" flag, by using the "-F" command-line option, or
93 by using a "name=" option on a control=submission ACL modifier.
95 JH/19 SPF: change the Authentication-Results expansion component to give
96 smtp.helo when the sender domain is empty. Previously it gave
99 JH/20 Bug 2631: ACL dnslist conditions now ignore and log any lookups returns
100 not in 127.0.0.0/8 to help in spotting list domains taken over by a
101 domain-parking registrar.
103 JH/21 Bug 2630: Fix trace eol-replacement string for the ${readsocket }
104 expansion. Previously when a whitespace character was specified it
105 was not inserted after removing the newline.
111 JH/01 Avoid costly startup code when not strictly needed. This reduces time
112 for some exim process initialisations. It does mean that the logging
113 of TLS configuration problems is only done for the daemon startup.
115 JH/02 Early-pipelining support code is now included unless disabled in Makefile.
117 JH/03 DKIM verification defaults no long accept sha1 hashes, to conform to
118 RFC 8301. They can still be enabled, using the dkim_verify_hashes main
121 JH/04 Support CHUNKING from an smtp transport using a transport_filter, when
122 DKIM signing is being done. Previously a transport_filter would always
123 disable CHUNKING, falling back to traditional DATA.
125 JH/05 Regard command-line receipients as tainted.
127 JH/06 Bug 340: Remove the daemon pid file on exit, whe due to SIGTERM.
129 JH/07 Bug 2489: Fix crash in the "pam" expansion condition. It seems that the
130 PAM library frees one of the arguments given to it, despite the
131 documentation. Therefore a plain malloc must be used.
133 JH/08 Bug 2491: Use tainted buffers for the transport smtp context. Previously
134 on-stack buffers were used, resulting in a taint trap when DSN information
135 copied from a received message was written into the buffer.
137 JH/09 Bug 2493: Harden ARC verify against Outlook, whick has been seen to mix
138 the ordering of its ARC headers. This caused a crash.
140 JH/10 Bug 2492: Use tainted memory for retry record when needed. Previously when
141 a new record was being constructed with information from the peer, a trap
144 JH/11 Bug 2494: Unset the default for dmarc_tld_file. Previously a naiive
145 installation would get error messages from DMARC verify, when it hit the
146 nonexistent file indicated by the default. Distros wanting DMARC enabled
147 should both provide the file and set the option.
148 Also enforce no DMARC verification for command-line sourced messages.
150 JH/12 Fix an uninitialised flag in early-pipelining. Previously connections
151 could, depending on the platform, hang at the STARTTLS response.
153 JH/13 Bug 2498: Reset a counter used for ARC verify before handling another
154 message on a connection. Previously if one message had ARC headers and
155 the following one did not, a crash could result when adding an
156 Authentication-Results: header.
158 JH/14 Bug 2500: Rewind some of the common-coding in string handling between the
159 Exim main code and Exim-related utities. The introduction of taint
160 tracking also did many adjustments to string handling. Since then, eximon
161 frequently terminated with an assert failure.
163 JH/15 When PIPELINING, synch after every hundred or so RCPT commands sent and
164 check for 452 responses. This slightly helps the inefficieny of doing
165 a large alias-expansion into a recipient-limited target. The max_rcpt
166 transport option still applies (and at the current default, will override
167 the new feature). The check is done for either cause of synch, and forces
168 a fast-retry of all 452'd recipients using a new MAIL FROM on the same
169 connection. The new facility is not tunable at this time.
171 JH/16 Fix the variables set by the gsasl authenticator. Previously a pointer to
172 library live data was being used, so the results became garbage. Make
173 copies while it is still usable.
175 JH/17 Logging: when the deliver_time selector ise set, include the DT= field
176 on delivery deferred (==) and failed (**) lines (if a delivery was
177 attemtped). Previously it was only on completion (=>) lines.
179 JH/18 Authentication: the gsasl driver not provides the $authN variables in time
180 for the expansion of the server_scram_iter and server_scram_salt options.
182 WB/01 SPF: DNS lookups for the obsolete SPF RR type done by the libspf2 library
183 are now specifically given a NO_DATA response without hitting the system
184 resolver. The library goes on to do the now-standard TXT lookup.
185 Use of dnsdb lookups is not affected.
187 JH/19 Bug 2507: Modules: on handling a dynamic-module (lookups) open failure,
188 only retrieve the errormessage once. Previously two calls to dlerror()
189 were used, and the second one (for mainlog/paniclog) retrieved null
192 JH/20 Taint checking: disallow use of tainted data for
193 - the appendfile transport file and directory options
194 - the pipe transport command
195 - the autoreply transport file, log and once options
196 - file names used by the redirect router (including filter files)
198 - paths used by single-key lookups
199 Previously this was permitted.
201 JH/21 Bug 2501: Fix init call in the heimdal authenticator. Previously it
202 adjusted the size of a major service buffer; this failed because the
203 buffer was in use at the time. Change to a compile-time increase in the
204 buffer size, when this authenticator is compiled into exim.
206 JH/22 Taint-checking: move to safe-mode taint checking on all platforms. The
207 previous fast-mode was untenable in the face of glibs using mmap to
208 support larger malloc requests.
210 PP/01 Update the openssl_options possible values through OpenSSL 1.1.1c.
211 New values supported, if defined on system where compiled:
212 allow_no_dhe_kex, cryptopro_tlsext_bug, enable_middlebox_compat,
213 no_anti_replay, no_encrypt_then_mac, prioritize_chacha, tlsext_padding
215 JH/23 Performance improvement in the initial phase of a two-pass queue run. By
216 running a limited number of proceses in parallel, a benefit is gained. The
217 amount varies with the platform hardware and load. The use of the option
218 queue_run_in_order means we cannot do this, as ordering becomes
221 JH/24 Bug 2524: fix the cyrus_sasl auth driver gssapi usage. A previous fix
222 had introduced a string-copy (for ensuring NUL-termination) which was not
223 appropriate for that case, which can include embedded NUL bytes in the
224 block of data. Investigation showed the copy to actually be needless, the
225 data being length-specified.
227 JH/25 Fix use of concurrent TLS connections under GnuTLS. When a callout was
228 done during a receiving connection, and both used TLS, global info was
229 used rather than per-connection info for tracking the state of data
230 queued for transmission. This could result in a connection hang.
232 JH/26 Fix use of the SIZE parameter on MAIL commands, on continued connections.
233 Previously, when delivering serveral messages down a single connection
234 only the first would provide a SIZE. This was due to the size information
235 not being properly tracked.
237 JH/27 Bug 2530: When operating in a timezone with sub-minute offset, such as
238 TAI (at 37 seconds currently), pretend to be in UTC for time-related
239 expansion and logging. Previously, spurious values such as a future
240 minute could be seen.
242 JH/28 Bug 2533: Fix expansion of ${tr } item. When called in some situations
243 it could crash from a null-deref. This could also affect the
244 ${addresses: } operator and ${readsock } item.
246 JH/29 Bug 2537: Fix $mime_part_count. When a single connection had a non-mime
247 message following a mime one, the variable was not reset.
249 JH/30 When an pipelined-connect fails at the first response, assume incorrect
250 cached capability (perhaps the peer reneged?) and immediately retry in
253 JH/31 Fix spurious detection of timeout while writing to transport filter.
255 JH/32 Bug 2541: Fix segfault on bad cmdline -f (sender) argument. Previously
256 an attempt to copy the string was made before checking it.
258 JH/33 Fix the dsearch lookup to return an untainted result. Previously the
259 taint of the lookup key was maintained; we now regard the presence in the
260 filesystem as sufficient validation.
262 JH/34 Fix the readsocket expansion to not segfault when an empty "options"
263 argument is supplied.
265 JH/35 The dsearch lookup now requires that the directory is an absolute path.
266 Previously this was not checked, and nonempty relative paths made an
267 access under Exim's current working directory.
269 JH/36 Bug 2554: Fix msg:defer event for the hosts_max_try_hardlimit case.
270 Previously no event was raised.
272 JH/37 Bug 2552: Fix the check on spool space during reception to use the SIZE
273 parameter supplied by the sender MAIL FROM command. Previously it was
274 ignored, and only the check_spool_space option value for the required
277 JH/38 Fix $dkim_key_length. This should, after a DKIM verification, present
278 the size of the signing public-key. Previously it was instead giving
279 the size of the signature hash.
281 JH/39 DKIM verification: the RFC 8301 restriction on sizes of RSA keys is now
282 the default. See the (new) dkim_verify_min_keysizes option.
284 JH/40 Fix a memory-handling bug: when a connection carried multiple messages
285 and an ACL use a lookup for checking either the local_part or domain,
286 stale data could be accessed. Ensure that variable references are
287 dropped between messages.
289 JH/41 Bug 2571: Fix SPA authenticator. Running as a server, an offset supplied
290 by the client was not checked as pointing within response data before
291 being used. A malicious client could thus cause an out-of-bounds read and
292 possibly gain authentication. Fix by adding the check.
294 JH/42 Internationalisation: change the default for downconversion in the smtp
295 transport to be "if needed". Previously it was "as previously set" for
296 the message, which usually meant "if needed" for message-submission but
297 "no" for everything else. However, MTAs have been seen using SMTPUTF8
298 even when the envelope addresses did not need it, resulting in forwarding
299 failures to non-supporting MTAs. A downconvert in such cases will be
300 a no-op on the addresses, merely dropping the use of SMTPUTF8 by the
301 transport. The change does mean that addresses needing conversion will
302 be converted when previously a delivery failure would occur.
304 JH/43 Fix possible long line in DSN. Previously when a very long SMTP error
305 response was received it would be used unchecked in a fail-DSN, violating
306 standards on line-length limits. Truncate if needed.
308 HS/01 Remove parameters of the link to www.open-spf.org. The linked form
309 doesn't work. (Additionally add a new main config option to configure the
316 JH/01 OpenSSL: With debug enabled output keying information sufficient, server
317 side, to decode a TLS 1.3 packet capture.
319 JH/02 OpenSSL: Suppress the sending of (stateful) TLS1.3 session tickets.
320 Previously the default library behaviour applied, sending two, each in
323 JH/03 Debug output for ACL now gives the config file name and line number for
326 JH/04 The default received_header_text now uses the RFC 8314 tls cipher clause.
328 JH/05 DKIM: ensure that dkim_domain elements are lowercased before use.
330 JH/06 Fix buggy handling of autoreply bounce_return_size_limit, and a possible
331 buffer overrun for (non-chunking) other transports.
333 JH/07 GnuTLS: Our use of late (post-handshake) certificate verification, under
334 TLS1.3, means that a server rejecting a client certificate is not visible
335 to the client until the first read of encrypted data (typically the
336 response to EHLO). Add detection for that case and treat it as a failed
337 TLS connection attempt, so that the normal retry-in-clear can work (if
338 suitably configured).
340 JB/01 Bug 2375: fix expansions of 822 addresses having comments in local-part
341 and/or domain. Found and fixed by Jason Betts.
343 JH/08 Add hardening against SRV & TLSA lookups the hit CNAMEs (a nonvalid
344 configuration). If a CNAME target was not a wellformed name pattern, a
347 JH/09 Logging: Fix initial listening-on line for multiple ports for an IP when
348 the OS reports them interleaved with other addresses.
350 JH/10 OpenSSL: Fix aggregation of messages. Previously, when PIPELINING was
351 used both for input and for a verify callout, both encrypted, SMTP
352 responses being sent by the server could be lost. This resulted in
353 dropped connections and sometimes bounces generated by a peer sending
356 JH/11 Harden plaintext authenticator against a badly misconfigured client-send
357 string. Previously it was possible to cause undefined behaviour in a
358 library routine (usually a crash). Found by "zerons".
360 JH/12 Bug 2384: fix "-bP smtp_receive_timeout". Previously it returned no
363 JH/13 Bug 2386: Fix builds with Dane under LibreSSL 2.9.0 onward. Some old
364 API was removed, so update to use the newer ones.
366 JH/14 Bug 1891: Close the log file if receiving a non-smtp message, without
367 any timeout set, is taking a long time. Previously we would hang on to a
368 rotated logfile "forever" if the input was arriving with long gaps
369 (a previous attempt to fix addressed lack, for a long time, of initial
372 HS/01 Bug 2390: Use message_id for tempfile creation to avoid races in a
373 shared (NFS) environment. The length of the tempfile name is now
374 4 + 16 ("hdr.$message_exim_id") which might break on file
375 systems which restrict the file name length to lower values.
378 HS/02 Bug 2390: Use message_id for tempfile creation to avoid races in a
379 shared (NFS) environment.
381 HS/03 Bug 2392: exigrep does case sensitive *option* processing (as it
382 did for all versions <4.90). Notably -M, -m, --invert, -I may be
385 JH/15 Use unsigned when creating bitmasks in macros, to avoid build errors
386 on some platforms for bit 31.
388 JH/16 GnuTLS: rework ciphersuite strings under recent library versions. Thanks
389 to changes apparently associated with TLS1.3 handling some of the APIs
390 previously used were either nonfunctional or inappropriate. Strings
391 like TLS1.3:ECDHE_SECP256R1__RSA_PSS_RSAE_SHA256__AES_256_GCM__AEAD:256
392 and TLS1.2:ECDHE_SECP256R1__RSA_SHA256__AES_128_CBC__SHA256:128 replace
393 the previous TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256 .
394 This affects log line X= elements, the $tls_{in,out}_cipher variables,
395 and the use of specific cipher names in the encrypted= ACL condition.
397 JH/17 OpenSSL: the default openssl_options now disables ssl_v3.
399 JH/18 GnuTLS: fix $tls_out_ocsp under hosts_request_ocsp. Previously the
400 verification result was not updated unless hosts_require_ocsp applied.
402 JH/19 Bug 2398: fix listing of a named-queue. Previously, even with the option
403 queue_list_requires_admin set to false, non-admin users were denied the
406 JH/20 Bug 2389: fix server advertising of usable certificates, under GnuTLS in
407 directory-of-certs mode. Previously they were advertised despite the
410 JH/21 The smtp transport option "hosts_noproxy_tls" is now unset by default.
411 A single TCP connection by a client will now hold a TLS connection open
412 for multiple message deliveries, by default. Previously the default was to
415 JH/22 The smtp transport option "hosts_try_dane" now enables all hosts by
416 default. If built with the facility, DANE will be used. The facility
417 SUPPORT_DANE is now enabled in the prototype build Makefile "EDITME".
419 JH/23 The build default is now for TLS to be included; the SUPPORT_TLS define
420 is replaced with DISABLE_TLS. Either USE_GNUTLS or (the new) USE_OPENSSL
421 must be defined and you must still, unless you define DISABLE_TLS, manage
422 the the include-dir and library-file requirements that go with that
423 choice. Non-TLS builds are still supported.
425 JH/24 Fix duplicated logging of peer name/address, on a transport connection-
428 JH/25 The smtp transport option "hosts_try_fastopen" now enables all hosts by
429 default. If the platform supports and has the facility enabled, it will
430 be requested on all coneections.
432 JH/26 The PIPE_CONNECT facility is promoted from experimental status and is now
433 controlled by the build-time option SUPPORT_PIPE_CONNECT.
435 PP/01 Unbreak heimdal_gssapi, broken in 4.92.
437 JH/27 Bug 2404: Use the main-section configuration option "dsn_from" for
438 success-DSN messages. Previously the From: header was always the default
439 one for these; the option was ignored.
441 JH/28 Fix the timeout on smtp response to apply to the whole response.
442 Previously it was reset for every read, so a teergrubing peer sending
443 single bytes within the time limit could extend the connection for a
444 long time. Credit to Qualsys Security Advisory Team for the discovery.
446 JH/29 Fix DSN Final-Recipient: field. Previously it was the post-routing
447 delivery address, which leaked information of the results of local
448 forwarding. Change to the original envelope recipient address, per
451 JH/30 Bug 2411: Fix DSN generation when RFC 3461 failure notification is
452 requested. Previously not bounce was generated and a log entry of
453 error ignored was made.
455 JH/31 Avoid re-expansion in ${sort } expansion. (CVE-2019-13917)
457 JH/32 Introduce a general tainting mechanism for values read from the input
458 channel, and values derived from them. Refuse to expand any tainted
459 values, to catch one form of exploit.
461 JH/33 Bug 2413: Fix dkim_strict option. Previously the expansion result
462 was unused and the unexpanded text used for the test. Found and
463 fixed by Ruben Jenster.
465 JH/34 Fix crash after TLS shutdown. When the TCP/SMTP channel was left open,
466 an attempt to use a TLS library read routine dereffed a nul pointer,
469 JH/35 Bug 2409: filter out-of-spec chars from callout response before using
470 them in our smtp response.
472 JH/36 Have the general router option retry_use_local_part default to true when
473 any of the restrictive preconditions are set (to anything). Previously it
474 was only for check_local user. The change removes one item of manual
475 configuration which is required for proper retries when a remote router
476 handles a subset of addresses for a domain.
478 JH/37 Appendfile: when evaluating quota use (non-quota_size_regex) take the file
479 link count into consideration.
481 HS/04 Fix handling of very log lines in -H files. If a -<key> <value> line
482 caused the extension of big_buffer, the following lines were ignored.
484 JH/38 Bug 1395: Teach the DNS negative-cache about TTL value from the SOA in
485 accordance with RFC 2308. Previously there was no expiry, so a longlived
486 receive process (eg. due to ACL delays) versus a short SOA value could
489 HS/05 Handle trailing backslash gracefully. (CVE-2019-15846)
491 JH/39 Promote DMARC support to mainline.
493 JH/40 Bug 2452: Add a References: header to DSNs.
495 JH/41 With GnuTLS 3.6.0 (and later) do not attempt to manage Diffie-Hellman
496 parameters. The relevant library call is documented as "Deprecated: This
497 function is unnecessary and discouraged on GnuTLS 3.6.0 or later. Since
498 3.6.0, DH parameters are negotiated following RFC7919."
500 HS/06 Change the default of dnssec_request_domains to "*"
502 JH/42 Bug 2545: Fix CHUNKING for all RCPT commands rejected. Previously we
503 carried on and emitted a BDAT command, even when PIPELINING was not
506 JH/43 Bug 2465: Fix taint-handling in dsearch lookup. Previously a nontainted
507 buffer was used for the filename, resulting in a trap when tainted
508 arguments (eg. $domain) were used.
510 JH/44 With OpenSSL 1.1.1 (onwards) disable renegotiation for TLS1.2 and below;
511 recommended to avoid a possible server-load attack. The feature can be
512 re-enabled via the openssl_options main cofiguration option.
514 JH/45 local_scan API: documented the current smtp_printf() call. This changed
515 for version 4.90 - adding a "more data" boolean to the arguments.
516 Bumped the ABI version number also, this having been missed previously;
517 release versions 4.90 to 4.92.3 inclusive were effectively broken in
518 respect of usage of smtp_printf() by either local_scan code or libraries
519 accessed via the ${dlfunc } expansion item. Both will need coding
520 adjustment for any calls to smtp_printf() to match the new function
521 signature; a FALSE value for the new argument is always safe.
523 JH/46 FreeBSD: fix use of the sendfile() syscall. The shim was not updating
524 the file-offset (which the Linux syscall does, and exim expects); this
525 resulted in an indefinite loop.
527 JH/47 ARC: fix crash in signing, triggered when a configuration error failed
528 to do ARC verification. The Authentication-Results: header line added
529 by the configuration then had no ARC item.
535 JH/01 Remove code calling the customisable local_scan function, unless a new
536 definition "HAVE_LOCAL_SCAN=yes" is present in the Local/Makefile.
538 JH/02 Bug 1007: Avoid doing logging from signal-handlers, as that can result in
539 non-signal-safe functions being used.
541 JH/03 Bug 2269: When presented with a received message having a stupidly large
542 number of DKIM-Signature headers, disable DKIM verification to avoid
543 a resource-consumption attack. The limit is set at twenty.
545 JH/04 Add variables $arc_domains, $arc_oldest_pass for ARC verify. Fix the
546 report of oldest_pass in ${authres } in consequence, and separate out
547 some descriptions of reasons for verification fail.
549 JH/05 Bug 2273: Cutthrough delivery left a window where the received messsage
550 files in the spool were present and unlocked. A queue-runner could spot
551 them, resulting in a duplicate delivery. Fix that by doing the unlock
552 after the unlink. Investigation by Tim Stewart. Take the opportunity to
553 add more error-checking on spoolfile handling while that code is being
556 PP/01 Refuse to open a spool data file (*-D) if it's a symlink.
557 No known attacks, no CVE, this is defensive hardening.
559 JH/06 Bug 2275: The MIME ACL unlocked the received message files early, and
560 a queue-runner could start a delivery while other operations were ongoing.
561 Cutthrough delivery was a common victim, resulting in duplicate delivery.
562 Found and investigated by Tim Stewart. Fix by using the open message data
563 file handle rather than opening another, and not locally closing it (which
564 releases a lock) for that case, while creating the temporary .eml format
565 file for the MIME ACL. Also applies to "regex" and "spam" ACL conditions.
567 JH/07 Bug 177: Make a random-recipient callout success visible in ACL, by setting
568 $sender_verify_failure/$recipient_verify_failure to "random".
570 JH/08 When generating a selfsigned cert, use serial number 1 since zero is not
573 JH/09 Bug 2274: Fix logging of cmdline args when starting in an unlinked cwd.
574 Previously this would segfault.
576 JH/10 Fix ARC signing for case when DKIM signing failed. Previously this would
579 JH/11 Bug 2264: Exim now only follows CNAME chains one step by default. We'd
580 like zero, since the resolver should be doing this for us, But we need one
581 as a CNAME but no MX presence gets the CNAME returned; we need to check
582 that doesn't point to an MX to declare it "no MX returned" rather than
583 "error, loop". A new main option is added so the older capability of
584 following some limited number of chain links is maintained.
586 JH/12 Add client-ip info to non-pass iprev ${authres } lines.
588 JH/13 For receent Openssl versions (1.1 onward) use modern generic protocol
589 methods. These should support TLS 1.3; they arrived with TLS 1.3 and the
590 now-deprecated earlier definitions used only specified the range up to TLS
591 1.2 (in the older-version library docs).
593 JH/14 Bug 2284: Fix DKIM signing for body lines starting with a pair of dots.
595 JH/15 Rework TLS client-side context management. Stop using a global, and
596 explicitly pass a context around. This enables future use of TLS for
597 connections to service-daemons (eg. malware scanning) while a client smtp
598 connection is using TLS; with cutthrough connections this is quite likely.
600 JH/16 Fix ARC verification to do AS checks in reverse order.
602 JH/17 Support a "tls" option on the ${readsocket } expansion item.
604 JH/18 Bug 2287: Fix the protocol name (eg utf8esmtp) for multiple messages
605 using the SMTPUTF8 option on their MAIL FROM commands, in one connection.
606 Previously the "utf8" would be re-prepended for every additional message.
608 JH/19 Reject MAIL FROM commands with SMTPUTF8 when the facility was not advertised.
609 Previously thery were accepted, resulting in issues when attempting to
610 forward messages to a non-supporting MTA.
612 PP/02 Let -n work with printing macros too, not just options.
614 JH/20 Bug 2296: Fix cutthrough for >1 address redirection. Previously only
615 one parent address was copied, and bogus data was used at delivery-logging
616 time. Either a crash (after delivery) or bogus log data could result.
617 Discovery and analysis by Tim Stewart.
619 PP/03 Make ${utf8clean:} expansion operator detect incomplete final character.
620 Previously if the string ended mid-character, we did not insert the
621 promised '?' replacement.
623 PP/04 Documentation: current string operators work on bytes, not codepoints.
625 JH/21 Change as many as possible of the global flags into one-bit bitfields; these
626 should pack well giving a smaller memory footprint so better caching and
627 therefore performance. Group the declarations where this can't be done so
628 that the byte-sized flag variables are not interspersed among pointer
629 variables, giving a better chance of good packing by the compiler.
631 JH/22 Bug 1896: Fix the envelope from for DMARC forensic reports to be possibly
632 non-null, to avoid issues with sites running BATV. Previously reports were
633 sent with an empty envelope sender so looked like bounces.
635 JH/23 Bug 2318: Fix the noerror command within filters. It wasn't working.
636 The ignore_error flag wasn't being returned from the filter subprocess so
637 was not set for later routers. Investigation and fix by Matthias Kurz.
639 JH/24 Bug 2310: Raise a msg:fail:internal event for each undelivered recipient,
640 and a msg:complete for the whole, when a message is manually removed using
641 -Mrm. Developement by Matthias Kurz, hacked on by JH.
643 JH/25 Avoid fixed-size buffers for pathnames in DB access. This required using
644 a "Gnu special" function, asprintf() in the DB utility binary builds; I
645 hope that is portable enough.
647 JH/26 Bug 2311: Fix DANE-TA verification under GnuTLS. Previously it was also
648 requiring a known-CA anchor certificate; make it now rely entirely on the
649 TLSA as an anchor. Checking the name on the leaf cert against the name
650 on the A-record for the host is still done for TA (but not for EE mode).
652 JH/27 Fix logging of proxy address. Previously, a pointless "PRX=[]:0" would be
653 included in delivery lines for non-proxied connections, when compiled with
654 SUPPORT_SOCKS and running with proxy logging enabled.
656 JH/28 Bug 2314: Fire msg:fail:delivery event even when error is being ignored.
657 Developement by Matthias Kurz, tweaked by JH. While in that bit of code,
658 move the existing event to fire before the normal logging of message
659 failure so that custom logging is bracketed by normal logging.
661 JH/29 Bug 2322: A "fail" command in a non-system filter (file) now fires the
662 msg:fail:internal event. Developement by Matthias Kurz.
664 JH/30 Bug 2329: Increase buffer size used for dns lookup from 2k, which was
665 far too small for todays use of crypto signatures stored there. Go all
666 the way to the max DNS message size of 64kB, even though this might be
667 overmuch for IOT constrained device use.
669 JH/31 Fix a bad use of a copy function, which could be used to pointlessly
670 copy a string over itself. The library routine is documented as not
671 supporting overlapping copies, and on MacOS it actually raised a SIGABRT.
673 JH/32 For main options check_spool_space and check_inode_space, where the
674 platform supports 64b integers, support more than the previous 2^31 kB
675 (i.e. more than 2 TB). Accept E, P and T multipliers in addition to
676 the previous G, M, k.
678 JH/33 Bug 2338: Fix the cyrus-sasl authenticator to fill in the
679 $authenticated_fail_id variable on authentication failure. Previously
682 JH/34 Increase RSA keysize of autogen selfsign cert from 1024 to 2048. RHEL 8.0
683 OpenSSL didn't want to use such a weak key. Do for GnuTLS also, and for
684 more-modern GnuTLS move from GNUTLS_SEC_PARAM_LOW to
685 GNUTLS_SEC_PARAM_MEDIUM.
687 JH/35 OpenSSL: fail the handshake when SNI processing hits a problem, server
688 side. Previously we would continue as if no SNI had been received.
690 JH/36 Harden the handling of string-lists. When a list consisted of a sole
691 "<" character, which should be a list-separator specification, we walked
692 off past the nul-terimation.
694 JH/37 Bug 2341: Send "message delayed" warning MDNs (restricted to external
695 causes) even when the retry time is not yet met. Previously they were
696 not, meaning that when (say) an account was over-quota and temp-rejecting,
697 and multiple senders' messages were queued, only one sender would get
698 notified on each configured delay_warning cycle.
700 JH/38 Bug 2351: Log failures to extract envelope addresses from message headers.
702 JH/39 OpenSSL: clear the error stack after an SSL_accept(). With anon-auth
703 cipher-suites, an error can be left on the stack even for a succeeding
704 accept; this results in impossible error messages when a later operation
707 AM/01 Bug 2359: GnuTLS: repeat lowlevel read and write operations while they
708 return error codes indicating retry. Under TLS1.3 this becomes required.
710 JH/40 Fix the feature-cache refresh for EXPERIMENTAL_PIPE_CONNECT. Previously
711 it only wrote the new authenticators, resulting in a lack of tracking of
712 peer changes of ESMTP extensions until the next cache flush.
714 JH/41 Fix the loop reading a message header line to check for integer overflow,
715 and more-often against header_maxsize. Previously a crafted message could
716 induce a crash of the recive process; now the message is cleanly rejected.
718 JH/42 Bug 2366: Fix the behaviour of the dkim_verify_signers option. It had
719 been totally disabled for all of 4.91. Discovery and fix by "Mad Alex".
725 GF/01 DEFER rather than ERROR on redis cluster MOVED response.
726 When redis_servers is set to a list of > 1 element, and the Redis servers
727 in that list are in cluster configuration, convert the REDIS_REPLY_ERROR
728 case of MOVED into a DEFER case instead, thus moving the query onto the
729 next server in the list. For a cluster of N elements, all N servers must
730 be defined in redis_servers.
732 GF/02 Catch and remove uninitialized value warning in exiqsumm
733 Check for existence of @ARGV before looking at $ARGV[0]
735 JH/01 Replace the store_release() internal interface with store_newblock(),
736 which internalises the check required to safely use the old one, plus
737 the allocate and data copy operations duplicated in both (!) of the
738 extant use locations.
740 JH/02 Disallow '/' characters in queue names specified for the "queue=" ACL
741 modifier. This matches the restriction on the commandline.
743 JH/03 Fix pgsql lookup for multiple result-tuples with a single column.
744 Previously only the last row was returned.
746 JH/04 Bug 2217: Tighten up the parsing of DKIM signature headers. Previously
747 we assumed that tags in the header were well-formed, and parsed the
748 element content after inspecting only the first char of the tag.
749 Assumptions at that stage could crash the receive process on malformed
752 JH/05 Bug 2215: Fix crash associated with dnsdb lookup done from DKIM ACL.
753 While running the DKIM ACL we operate on the Permanent memory pool so that
754 variables created with "set" persist to the DATA ACL. Also (at any time)
755 DNS lookups that fail create cache records using the Permanent pool. But
756 expansions release any allocations made on the current pool - so a dnsdb
757 lookup expansion done in the DKIM ACL releases the memory used for the
758 DNS negative-cache, and bad things result. Solution is to switch to the
759 Main pool for expansions.
760 While we're in that code, add checks on the DNS cache during store_reset,
761 active in the testsuite.
762 Problem spotted, and debugging aided, by Wolfgang Breyha.
764 JH/06 Fix issue with continued-connections when the DNS shifts unreliably.
765 When none of the hosts presented to a transport match an already-open
766 connection, close it and proceed with the list. Previously we would
767 queue the message. Spotted by Lena with Yahoo, probably involving
770 JH/07 Bug 2214: Fix SMTP responses resulting from non-accept result of MIME ACL.
771 Previously a spurious "250 OK id=" response was appended to the proper
774 JH/08 The "support for" informational output now, which built with Content
775 Scanning support, has a line for the malware scanner interfaces compiled
776 in. Interface can be individually included or not at build time.
778 JH/09 The "aveserver", "kavdaemon" and "mksd" interfaces are now not included
779 by the template makefile "src/EDITME". The "STREAM" support for an older
780 ClamAV interface method is removed.
782 JH/10 Bug 2223: Fix mysql lookup returns for the no-data case (when the number of
783 rows affected is given instead).
785 JH/11 The runtime Berkeley DB library version is now additionally output by
786 "exim -d -bV". Previously only the compile-time version was shown.
788 JH/12 Bug 2230: Fix cutthrough routing for nonfirst messages in an initiating
789 SMTP connection. Previously, when one had more receipients than the
790 first, an abortive onward connection was made. Move to full support for
791 multiple onward connections in sequence, handling cutthrough connection
792 for all multi-message initiating connections.
794 JH/13 Bug 2229: Fix cutthrough routing for nonstandard port numbers defined by
795 routers. Previously, a multi-recipient message would fail to match the
796 onward-connection opened for the first recipient, and cause its closure.
798 JH/14 Bug 2174: A timeout on connect for a callout was also erroneously seen as
799 a timeout on read on a GnuTLS initiating connection, resulting in the
800 initiating connection being dropped. This mattered most when the callout
801 was marked defer_ok. Fix to keep the two timeout-detection methods
804 JH/15 Relax results from ACL control request to enable cutthrough, in
805 unsupported situations, from error to silently (except under debug)
806 ignoring. This covers use with PRDR, frozen messages, queue-only and
809 HS/01 Fix Buffer overflow in base64d() (CVE-2018-6789)
811 JH/16 Fix bug in DKIM verify: a buffer overflow could corrupt the malloc
812 metadata, resulting in a crash in free().
814 PP/01 Fix broken Heimdal GSSAPI authenticator integration.
815 Broken in f2ed27cf5, missing an equals sign for specified-initialisers.
816 Broken also in d185889f4, with init system revamp.
818 JH/17 Bug 2113: Fix conversation closedown with the Avast malware scanner.
819 Previously we abruptly closed the connection after reading a malware-
820 found indication; now we go on to read the "scan ok" response line,
823 JH/18 Bug 2239: Enforce non-usability of control=utf8_downconvert in the mail
824 ACL. Previously, a crash would result.
826 JH/19 Speed up macro lookups during configuration file read, by skipping non-
827 macro text after a replacement (previously it was only once per line) and
828 by skipping builtin macros when searching for an uppercase lead character.
830 JH/20 DANE support moved from Experimental to mainline. The Makefile control
831 for the build is renamed.
833 JH/21 Fix memory leak during multi-message connections using STARTTLS. A buffer
834 was allocated for every new TLS startup, meaning one per message. Fix
835 by only allocating once (OpenSSL) or freeing on TLS-close (GnuTLS).
837 JH/22 Bug 2236: When a DKIM verification result is overridden by ACL, DMARC
838 reported the original. Fix to report (as far as possible) the ACL
839 result replacing the original.
841 JH/23 Fix memory leak during multi-message connections using STARTTLS under
842 OpenSSL. Certificate information is loaded for every new TLS startup,
843 and the resources needed to be freed.
845 JH/24 Bug 2242: Fix exim_dbmbuild to permit directoryless filenames.
847 JH/25 Fix utf8_downconvert propagation through a redirect router. Previously it
850 JH/26 Bug 2253: For logging delivery lines under PRDR, append the overall
851 DATA response info to the (existing) per-recipient response info for
852 the "C=" log element. It can have useful tracking info from the
853 destination system. Patch from Simon Arlott.
855 JH/27 Bug 2251: Fix ldap lookups that return a single attribute having zero-
856 length value. Previously this would segfault.
858 HS/02 Support Avast multiline protoocol, this allows passing flags to
859 newer versions of the scanner.
861 JH/28 Ensure that variables possibly set during message acceptance are marked
862 dead before release of memory in the daemon loop. This stops complaints
863 about them when the debug_store option is enabled. Discovered specifically
864 for sender_rate_period, but applies to a whole set of variables.
865 Do the same for the queue-runner and queue-list loops, for variables set
866 from spool message files. Do the same for the SMTP per-message loop, for
867 certain variables indirectly set in ACL operations.
869 JH/29 Bug 2250: Fix a longstanding bug in heavily-pipelined SMTP input (such
870 as a multi-recipient message from a mailinglist manager). The coding had
871 an arbitrary cutoff number of characters while checking for more input;
872 enforced by writing a NUL into the buffer. This corrupted long / fast
873 input. The problem was exposed more widely when more pipelineing of SMTP
874 responses was introduced, and one Exim system was feeding another.
875 The symptom is log complaints of SMTP syntax error (NUL chars) on the
876 receiving system, and refused recipients seen by the sending system
877 (propating to people being dropped from mailing lists).
878 Discovered and pinpointed by David Carter.
880 JH/30 The (EXPERIMENTAL_DMARC) variable $dmarc_ar_header is withdrawn, being
881 replaced by the ${authresults } expansion.
883 JH/31 Bug 2257: Fix pipe transport to not use a socket-only syscall.
885 HS/03 Set a handler for SIGTERM and call exit(3) if running as PID 1. This
886 allows proper process termination in container environments.
888 JH/32 Bug 2258: Fix spool_wireformat in combination with LMTP transport.
889 Previously the "final dot" had a newline after it; ensure it is CR,LF.
891 JH/33 SPF: remove support for the "spf" ACL condition outcome values "err_temp"
892 and "err_perm", deprecated since 4.83 when the RFC-defined words
893 "temperror" and "permerror" were introduced.
895 JH/34 Re-introduce enforcement of no cutthrough delivery on transports having
896 transport-filters or DKIM-signing. The restriction was lost in the
897 consolidation of verify-callout and delivery SMTP handling.
898 Extend the restriction to also cover ARC-signing.
900 JH/35 Cutthrough: for a final-dot response timeout (and nonunderstood responses)
901 in defer=pass mode supply a 450 to the initiator. Previously the message
904 PP/02 DANE: add dane_require_tls_ciphers SMTP Transport option; if unset,
905 tls_require_ciphers is used as before.
907 HS/03 Malware Avast: Better match the Avast multiline protocol. Add
908 "pass_unscanned". Only tmpfails from the scanner are written to
909 the paniclog, as they may require admin intervention (permission
910 denied, license issues). Other scanner errors (like decompression
911 bombs) do not cause a paniclog entry.
913 JH/36 Fix reinitialisation of DKIM logging variable between messages.
914 Previously it was possible to log spurious information in receive log
917 JH/37 Bug 2255: Revert the disable of the OpenSSL session caching. This
918 triggered odd behaviour from Outlook Express clients.
920 PP/03 Add util/renew-opendmarc-tlds.sh script for safe renewal of public
923 JH/38 DKIM: accept Ed25519 pubkeys in SubjectPublicKeyInfo-wrapped form,
924 since the IETF WG has not yet settled on that versus the original
925 "bare" representation.
927 JH/39 Fix syslog logging for syslog_timestamp=no and log_selector +millisec.
928 Previously the millisecond value corrupted the output.
929 Fix also for syslog_pid=no and log_selector +pid, for which the pid
930 corrupted the output.
936 JH/01 Rework error string handling in TLS interface so that the caller in
937 more cases is responsible for logging. This permits library-sourced
938 string to be attached to addresses during delivery, and collapses
939 pairs of long lines into single ones.
941 PP/01 Allow PKG_CONFIG_PATH to be set in Local/Makefile and use it correctly
942 during configuration. Wildcards are allowed and expanded.
944 JH/02 Rework error string handling in DKIM to pass more info back to callers.
945 This permits better logging.
947 JH/03 Rework the transport continued-connection mechanism: when TLS is active,
948 do not close it down and have the child transport start it up again on
949 the passed-on TCP connection. Instead, proxy the child (and any
950 subsequent ones) for TLS via a unix-domain socket channel. Logging is
951 affected: the continued delivery log lines do not have any DNSSEC, TLS
952 Certificate or OCSP information. TLS cipher information is still logged.
954 JH/04 Shorten the log line for daemon startup by collapsing adjacent sets of
955 identical IP addresses on different listening ports. Will also affect
958 PP/02 Bug 2070: uClibc defines __GLIBC__ without providing glibc headers;
959 add noisy ifdef guards to special-case this sillyness.
960 Patch from Bernd Kuhls.
962 JH/05 Tighten up the checking in isip4 (et al): dotted-quad components larger
963 than 255 are no longer allowed.
965 JH/06 Default openssl_options to include +no_ticket, to reduce load on peers.
966 Disable the session-cache too, which might reduce our load. Since we
967 currrectly use a new context for every connection, both as server and
968 client, there is no benefit for these.
969 GnuTLS appears to not support tickets server-side by default (we don't
970 call gnutls_session_ticket_enable_server()) but client side is enabled
971 by default on recent versions (3.1.3 +) unless the PFS priority string
974 PP/03 Add $SOURCE_DATE_EPOCH support for reproducible builds, per spec at
975 <https://reproducible-builds.org/specs/source-date-epoch/>.
977 JH/07 Fix smtp transport use of limited max_rcpt under mua_wrapper. Previously
978 the check for any unsuccessful recipients did not notice the limit, and
979 erroneously found still-pending ones.
981 JH/08 Pipeline CHUNKING command and data together, on kernels that support
982 MSG_MORE. Only in-clear (not on TLS connections).
984 JH/09 Avoid using a temporary file during transport using dkim. Unless a
985 transport-filter is involved we can buffer the headers in memory for
986 creating the signature, and read the spool data file once for the
987 signature and again for transmission.
989 JH/10 Enable use of sendfile in Linux builds as default. It was disabled in
990 4.77 as the kernel support then wasn't solid, having issues in 64bit
991 mode. Now, it's been long enough. Add support for FreeBSD also.
993 JH/11 Bug 2104: Fix continued use of a transport connection with TLS. In the
994 case where the routing stage had gathered several addresses to send to
995 a host before calling the transport for the first, we previously failed
996 to close down TLS in the old transport process before passing the TCP
997 connection to the new process. The new one sent a STARTTLS command
998 which naturally failed, giving a failed delivery and bloating the retry
999 database. Investigation and fix prototype from Wolfgang Breyha.
1001 JH/12 Fix check on SMTP command input synchronisation. Previously there were
1002 false-negatives in the check that the sender had not preempted a response
1003 or prompt from Exim (running as a server), due to that code's lack of
1004 awareness of the SMTP input buffering.
1006 PP/04 Add commandline_checks_require_admin option.
1007 Exim drops privileges sanely, various checks such as -be aren't a
1008 security problem, as long as you trust local users with access to their
1009 own account. When invoked by services which pass untrusted data to
1010 Exim, this might be an issue. Set this option in main configuration
1011 AND make fixes to the calling application, such as using `--` to stop
1014 JH/13 Do pipelining under TLS. Previously, although safe, no advantage was
1015 taken. Now take care to pack both (client) MAIL,RCPT,DATA, and (server)
1016 responses to those, into a single TLS record each way (this usually means
1017 a single packet). As a side issue, smtp_enforce_sync now works on TLS
1020 PP/05 OpenSSL/1.1: use DH_bits() for more accurate DH param sizes. This
1021 affects you only if you're dancing at the edge of the param size limits.
1022 If you are, and this message makes sense to you, then: raise the
1023 configured limit or use OpenSSL 1.1. Nothing we can do for older
1026 JH/14 For the "sock" variant of the malware scanner interface, accept an empty
1027 cmdline element to get the documented default one. Previously it was
1030 JH/15 Fix a crash in the smtp transport caused when two hosts in succession
1031 are unsuable for non-message-specific reasons - eg. connection timeout,
1032 banner-time rejection.
1034 JH/16 Fix logging of delivery remote port, when specified by router, under
1037 PP/06 Repair manualroute's ability to take options in any order, even if one
1038 is the name of a transport.
1041 HS/01 Cleanup, prevent repeated use of -p/-oMr (CVE-2017-1000369)
1043 JH/17 Change the list-building routines interface to use the expanding-string
1044 triplet model, for better allocation and copying behaviour.
1046 JH/18 Prebuild the data-structure for "builtin" macros, for faster startup.
1047 Previously it was constructed the first time a possibly-matching string
1048 was met in the configuration file input during startup; now it is done
1051 JH/19 Bug 2141: Use the full-complex API for Berkeley DB rather than the legacy-
1052 compatible one, to avoid the (poorly documented) possibility of a config
1053 file in the working directory redirecting the DB files, possibly correpting
1054 some existing file. CVE-2017-10140 assigned for BDB.
1056 JH/20 Bug 2147: Do not defer for a verify-with-callout-and-random which is not
1057 cache-hot. Previously, although the result was properly cached, the
1058 initial verify call returned a defer.
1060 JH/21 Bug 2151: Avoid using SIZE on the MAIL for a callout verify, on any but
1061 the main verify for receipient in uncached-mode.
1063 JH/22 Retire historical build files to an "unsupported" subdir. These are
1064 defined as "ones for which we have no current evidence of testing".
1066 JH/23 DKIM: enforce the DNS pubkey record "h" permitted-hashes optional field,
1067 if present. Previously it was ignored.
1069 JH/24 Start using specified-initialisers in C structure init coding. This is
1070 a C99 feature (it's 2017, so now considered safe).
1072 JH/25 Use one-bit bitfields for flags in the "addr" data structure. Previously
1073 if was a fixed-sized field and bitmask ops via macros; it is now more
1076 PP/07 GitHub PR 56: Apply MariaDB build fix.
1077 Patch provided by Jaroslav Škarvada.
1079 PP/08 Bug 2161: Fix regression in sieve quoted-printable handling introduced
1080 during Coverity cleanups [4.87 JH/47]
1081 Diagnosis and fix provided by Michael Fischer v. Mollard.
1083 JH/26 Fix DKIM bug: when the pseudoheader generated for signing was exactly
1084 the right size to place the terminating semicolon on its own folded
1085 line, the header hash was calculated to an incorrect value thanks to
1086 the (relaxed) space the fold became.
1088 HS/02 Fix Bug 2130: large writes from the transport subprocess were chunked
1089 and confused the parent.
1091 JH/27 Fix SOCKS bug: an unitialized pointer was deref'd by the transport process
1092 which could crash as a result. This could lead to undeliverable messages.
1094 JH/28 Logging: "next input sent too soon" now shows where input was truncated
1097 JH/29 Fix queue_run_in_order to ignore the PID portion of the message ID. This
1098 matters on fast-turnover and PID-randomising systems, which were getting
1099 out-of-order delivery.
1101 JH/30 Fix a logging bug on aarch64: an unsafe routine was previously used for
1102 a possibly-overlapping copy. The symptom was that "Remote host closed
1103 connection in response to HELO" was logged instead of the actual 4xx
1106 JH/31 Fix CHUNKING code to properly flush the unwanted chunk after an error.
1107 Previously only that bufferd was discarded, resulting in SYMTP command
1110 JH/32 DKIM: when a message has multiple signatures matching an identity given
1111 in dkim_verify_signers, run the dkim acl once for each. Previously only
1112 one run was done. Bug 2189.
1114 JH/33 Downgrade an unfound-list name (usually a typo in the config file) from
1115 "panic the current process" to "deliberately defer". The panic log is
1116 still written with the problem list name; the mail and reject logs now
1117 get a temp-reject line for the message that was being handled, saying
1118 something like "domains check lookup or other defer". The SMTP 451
1119 message is still "Temporary local problem".
1121 JH/34 Bug 2199: Fix a use-after-free while reading smtp input for header lines.
1122 A crafted sequence of BDAT commands could result in in-use memory beeing
1123 freed. CVE-2017-16943.
1125 HS/03 Bug 2201: Fix checking for leading-dot on a line during headers reading
1126 from SMTP input. Previously it was always done; now only done for DATA
1127 and not BDAT commands. CVE-2017-16944.
1129 JH/35 Bug 2201: Flush received data in BDAT mode after detecting an error fatal
1130 to the message (such as an overlong header line). Previously this was
1131 not done and we did not exit BDAT mode. Followon from the previous item
1132 though a different problem.
1138 JH/01 Bug 1922: Support IDNA2008. This has slightly different conversion rules
1139 than -2003 did; needs libidn2 in addition to libidn.
1141 JH/02 The path option on a pipe transport is now expanded before use.
1143 PP/01 GitHub PR 50: Do not call ldap_start_tls_s on ldapi:// connections.
1144 Patch provided by "Björn", documentation fix added too.
1146 JH/03 Bug 2003: fix Proxy Protocol v2 handling: the address size field was
1147 missing a wire-to-host endian conversion.
1149 JH/04 Bug 2004: fix CHUNKING in non-PIPELINEING mode. Chunk data following
1150 close after a BDAT command line could be taken as a following command,
1151 giving a synch failure. Fix by only checking for synch immediately
1152 before acknowledging the chunk.
1154 PP/02 GitHub PR 52: many spelling fixes, which include fixing parsing of
1155 no_require_dnssec option and creation of _HAVE_TRANSPORT_APPEND_MAILDIR
1156 macro. Patches provided by Josh Soref.
1158 JH/05 Have the EHLO response advertise VRFY, if there is a vrfy ACL defined.
1159 Previously we did not; the RFC seems ambiguous and VRFY is not listed
1160 by IANA as a service extension. However, John Klensin suggests that we
1163 JH/06 Bug 2017: Fix DKIM verification in -bh test mode. The data feed into
1164 the dkim code may be unix-mode line endings rather than smtp wire-format
1165 CRLF, so prepend a CR to any bare LF.
1167 JH/07 Rationalise the coding for callout smtp conversations and transport ones.
1168 As a side-benfit, callouts can now use PIPELINING hence fewer round-trips.
1170 JH/08 Bug 2016: Fix DKIM verification vs. CHUNKING. Any BDAT commands after
1171 the first were themselves being wrongly included in the feed into dkim
1172 processing; with most chunk sizes in use this resulted in an incorrect
1173 body hash calculated value.
1175 JH/09 Bug 2014: permit inclusion of a DKIM-Signature header in a received
1176 DKIM signature block, for verification. Although advised against by
1177 standards it is specifically not ruled illegal.
1179 JH/10 Bug 2025: Fix reception of (quoted) local-parts with embedded spaces.
1181 JH/11 Bug 2029: Fix crash in DKIM verification when a message signature block is
1182 missing a body hash (the bh= tag).
1184 JH/12 Bug 2018: Re-order Proxy Protocol startup versus TLS-on-connect startup.
1185 It seems that HAProxy sends the Proxy Protocol information in clear and
1186 only then does a TLS startup, so do the same.
1188 JH/13 Bug 2027: Avoid attempting to use TCP Fast Open for non-transport client
1189 TCP connections (such as for Spamd) unless the daemon successfully set
1190 Fast Open mode on its listening sockets. This fixes breakage seen on
1191 too-old kernels or those not configured for Fast Open, at the cost of
1192 requiring both directions being enabled for TFO, and TFO never being used
1193 by non-daemon-related Exim processes.
1195 JH/14 Bug 2000: Reject messages recieved with CHUNKING but with malformed line
1196 endings, at least on the first header line. Try to canonify any that get
1197 past that check, despite the cost.
1199 JH/15 Angle-bracket nesting (an error inserted by broken sendmails) levels are
1200 now limited to an arbitrary five deep, while parsing addresses with the
1201 strip_excess_angle_brackets option enabled.
1203 PP/03 Bug 2018: For Proxy Protocol and TLS-on-connect, do not over-read and
1204 instead leave the unprompted TLS handshake in socket buffer for the
1205 TLS library to consume.
1207 PP/04 Bug 2018: Also handle Proxy Protocol v2 safely.
1209 PP/05 FreeBSD compat: handle that Ports no longer create /usr/bin/perl
1211 JH/16 Drop variables when they go out of scope. Memory management drops a whole
1212 region in one operation, for speed, and this leaves assigned pointers
1213 dangling. Add checks run only under the testsuite which checks all
1214 variables at a store-reset and panics on a dangling pointer; add code
1215 explicitly nulling out all the variables discovered. Fixes one known
1216 bug: a transport crash, where a dangling pointer for $sending_ip_address
1217 originally assigned in a verify callout, is re-used.
1219 PP/06 Drop '.' from @INC in various Perl scripts.
1221 PP/07 Switch FreeBSD iconv to always use the base-system libc functions.
1223 PP/08 Reduce a number of compilation warnings under clang; building with
1224 CC=clang CFLAGS+=-Wno-dangling-else -Wno-logical-op-parentheses
1225 should be warning-free.
1227 JH/17 Fix inbound CHUNKING when DKIM disabled at runtime.
1229 HS/01 Fix portability problems introduced by PP/08 for platforms where
1230 realloc(NULL) is not equivalent to malloc() [SunOS et al].
1232 HS/02 Bug 1974: Fix missing line terminator on the last received BDAT
1233 chunk. This allows us to accept broken chunked messages. We need a more
1234 general solution here.
1236 PP/09 Wrote util/chunking_fixqueue_finalnewlines.pl to help recover
1237 already-broken messages in the queue.
1239 JH/18 Bug 2061: Fix ${extract } corrupting an enclosing ${reduce } $value.
1241 JH/19 Fix reference counting bug in routing-generated-address tracking.
1247 JH/01 Use SIZE on MAIL FROM in a cutthrough connection, if the destination
1248 supports it and a size is available (ie. the sending peer gave us one).
1250 JH/02 The obsolete acl condition "demime" is removed (finally, after ten
1251 years of being deprecated). The replacements are the ACLs
1252 acl_smtp_mime and acl_not_smtp_mime.
1254 JH/03 Upgrade security requirements imposed for hosts_try_dane: previously
1255 a downgraded non-dane trust-anchor for the TLS connection (CA-style)
1256 or even an in-clear connection were permitted. Now, if the host lookup
1257 was dnssec and dane was requested then the host is only used if the
1258 TLSA lookup succeeds and is dnssec. Further hosts (eg. lower priority
1259 MXs) will be tried (for hosts_try_dane though not for hosts_require_dane)
1260 if one fails this test.
1261 This means that a poorly-configured remote DNS will make it incommunicado;
1262 but it protects against a DNS-interception attack on it.
1264 JH/04 Bug 1810: make continued-use of an open smtp transport connection
1265 non-noisy when a race steals the message being considered.
1267 JH/05 If main configuration option tls_certificate is unset, generate a
1268 self-signed certificate for inbound TLS connections.
1270 JH/06 Bug 165: hide more cases of password exposure - this time in expansions
1271 in rewrites and routers.
1273 JH/07 Retire gnutls_require_mac et.al. These were nonfunctional since 4.80
1274 and logged a warning sing 4.83; now they are a configuration file error.
1276 JH/08 Bug 1836: Fix crash in VRFY handling when handed an unqualified name
1277 (lacking @domain). Apply the same qualification processing as RCPT.
1279 JH/09 Bug 1804: Avoid writing msglog files when in -bh or -bhc mode.
1281 JH/10 Support ${sha256:} applied to a string (as well as the previous
1284 JH/11 Cutthrough: avoid using the callout hints db on a verify callout when
1285 a cutthrough deliver is pending, as we always want to make a connection.
1286 This also avoids re-routing the message when later placing the cutthrough
1287 connection after a verify cache hit.
1288 Do not update it with the verify result either.
1290 JH/12 Cutthrough: disable when verify option success_on_redirect is used, and
1291 when routing results in more than one destination address.
1293 JH/13 Cutthrough: expand transport dkim_domain option when testing for dkim
1294 signing (which inhibits the cutthrough capability). Previously only
1295 the presence of an option was tested; now an expansion evaluating as
1296 empty is permissible (obviously it should depend only on data available
1297 when the cutthrough connection is made).
1299 JH/14 Fix logging of errors under PIPELINING. Previously the log line giving
1300 the relevant preceding SMTP command did not note the pipelining mode.
1302 JH/15 Fix counting of empty lines in $body_linecount and $message_linecount.
1303 Previously they were not counted.
1305 JH/16 DANE: treat a TLSA lookup response having all non-TLSA RRs, the same
1306 as one having no matching records. Previously we deferred the message
1307 that needed the lookup.
1309 JH/17 Fakereject: previously logged as a normal message arrival "<="; now
1310 distinguished as "(=".
1312 JH/18 Bug 1867: make the fail_defer_domains option on a dnslookup router work
1313 for missing MX records. Previously it only worked for missing A records.
1315 JH/19 Bug 1850: support Radius libraries that return REJECT_RC.
1317 JH/20 Bug 1872: Ensure that acl_smtp_notquit is run when the connection drops
1318 after the data-go-ahead and data-ack. Patch from Jason Betts.
1320 JH/21 Bug 1846: Send DMARC forensic reports for reject and quarantine results,
1321 even for a "none" policy. Patch from Tony Meyer.
1323 JH/22 Fix continued use of a connection for further deliveries. If a port was
1324 specified by a router, it must also match for the delivery to be
1327 JH/23 Bug 1874: fix continued use of a connection for further deliveries.
1328 When one of the recipients of a message was unsuitable for the connection
1329 (has no matching addresses), we lost track of needing to mark it
1330 deferred. As a result mail would be lost.
1332 JH/24 Bug 1832: Log EHLO response on getting conn-close response for HELO.
1334 JH/25 Decoding ACL controls is now done using a binary search; the source code
1335 takes up less space and should be simpler to maintain. Merge the ACL
1336 condition decode tables also, with similar effect.
1338 JH/26 Fix problem with one_time used on a redirect router which returned the
1339 parent address unchanged. A retry would see the parent address marked as
1340 delivered, so not attempt the (identical) child. As a result mail would
1343 JH/27 Fix a possible security hole, wherein a process operating with the Exim
1344 UID can gain a root shell. Credit to http://www.halfdog.net/ for
1345 discovery and writeup. Ubuntu bug 1580454; no bug raised against Exim
1348 JH/28 Enable {spool,log} filesystem space and inode checks as default.
1349 Main config options check_{log,spool}_{inodes,space} are now
1350 100 inodes, 10MB unless set otherwise in the configuration.
1352 JH/29 Fix the connection_reject log selector to apply to the connect ACL.
1353 Previously it only applied to the main-section connection policy
1356 JH/30 Bug 1897: fix callouts connection fallback from TLS to cleartext.
1358 PP/01 Changed default Diffie-Hellman parameters to be Exim-specific, created
1359 by me. Added RFC7919 DH primes as an alternative.
1361 PP/02 Unbreak build via pkg-config with new hash support when crypto headers
1362 are not in the system include path.
1364 JH/31 Fix longstanding bug with aborted TLS server connection handling. Under
1365 GnuTLS, when a session startup failed (eg because the client disconnected)
1366 Exim did stdio operations after fclose. This was exposed by a recent
1367 change which nulled out the file handle after the fclose.
1369 JH/32 Bug 1909: Fix OCSP proof verification for cases where the proof is
1370 signed directly by the cert-signing cert, rather than an intermediate
1371 OCSP-signing cert. This is the model used by LetsEncrypt.
1373 JH/33 Bug 1914: Ensure socket is nonblocking before draining after SMTP QUIT.
1375 HS/01 Fix leak in verify callout under GnuTLS, about 3MB per recipient on
1376 an incoming connection.
1378 HS/02 Bug 1802: Do not half-close the connection after sending a request
1381 HS/03 Use "auto" as the default EC curve parameter. For OpenSSL < 1.0.2
1382 fallback to "prime256v1".
1384 JH/34 SECURITY: Use proper copy of DATA command in error message.
1385 Could leak key material. Remotely exploitable. CVE-2016-9963.
1391 JH/01 Bug 1664: Disable OCSP for GnuTLS library versions at/before 3.3.16
1392 and 3.4.4 - once the server is enabled to respond to an OCSP request
1393 it does even when not requested, resulting in a stapling non-aware
1394 client dropping the TLS connection.
1396 TF/01 Code cleanup: Overhaul the debug_selector and log_selector machinery to
1397 support variable-length bit vectors. No functional change.
1399 TF/02 Improve the consistency of logging incoming and outgoing interfaces.
1400 The I= interface field on outgoing lines is now after the H= remote
1401 host field, same as incoming lines. There is a separate
1402 outgoing_interface log selector which allows you to disable the
1405 JH/02 Bug 728: Close logfiles after a daemon-process "exceptional" log write.
1406 If not running log_selector +smtp_connection the mainlog would be held
1407 open indefinitely after a "too many connections" event, including to a
1408 deleted file after a log rotate. Leave the per net connection logging
1409 leaving it open for efficiency as that will be quickly detected by the
1410 check on the next write.
1412 HS/01 Bug 1671: Fix post transport crash.
1413 Processing the wait-<transport> messages could crash the delivery
1414 process if the message IDs didn't exist for some reason. When
1415 using 'split_spool_directory=yes' the construction of the spool
1416 file name failed already, exposing the same netto behaviour.
1418 JH/03 Bug 425: Capture substrings in $regex1, $regex2 etc from regex &
1419 mime_regex ACL conditions.
1421 JH/04 Bug 1686: When compiled with EXPERIMENTAL_DSN_INFO: Add extra information
1422 to DSN fail messages (bounces): remote IP, remote greeting, remote response
1423 to HELO, local diagnostic string.
1425 JH/05 Downgrade message for a TLS-certificate-based authentication fail from
1426 log line to debug. Even when configured with a tls authenticator many
1427 client connections are expected to not authenticate in this way, so
1428 an authenticate fail is not an error.
1430 HS/02 Add the Exim version string to the process info. This way exiwhat
1431 gives some more detail about the running daemon.
1433 JH/06 Bug 1395: time-limit caching of DNS lookups, to the TTL value. This may
1434 matter for fast-change records such as DNSBLs.
1436 JH/07 Bug 1678: Always record an interface option value, if set, as part of a
1437 retry record, even if constant. There may be multiple transports with
1438 different interface settings and the retry behaviour needs to be kept
1441 JH/08 Bug 1586: exiqgrep now refuses to run if there are unexpected arguments.
1443 JH/09 Bug 1700: ignore space & tab embedded in base64 during decode.
1445 JH/10 Bug 840: fix log_defer_output option of pipe transport
1447 JH/11 Bug 830: use same host for all RCPTS of a message, even under
1448 hosts_randomize. This matters a lot when combined with mua_wrapper.
1450 JH/12 Bug 1706: percent and underbar characters are no longer escaped by the
1451 ${quote_pgsql:<string>} operator.
1453 JH/13 Bug 1708: avoid misaligned access in cached lookup.
1455 JH/14 Change header file name for freeradius-client. Relevant if compiling
1456 with Radius support; from the Gentoo tree and checked under Fedora.
1458 JH/15 Bug 1712: Introduce $prdr_requested flag variable
1460 JH/16 Bug 1714: Permit an empty string as expansion result for transport
1461 option transport_filter, meaning no filtering.
1463 JH/17 Bug 1713: Fix non-PDKIM_DEBUG build. Patch from Jasen Betts.
1465 JH/18 Bug 1709: When built with TLS support, the tls_advertise_hosts option now
1466 defaults to "*" (all hosts). The variable is now available when not built
1467 with TLS, default unset, mainly to enable keeping the testsuite sane.
1468 If a server certificate is not supplied (via tls_certificate) an error is
1469 logged, and clients will find TLS connections fail on startup. Presumably
1470 they will retry in-clear.
1471 Packagers of Exim are strongly encouraged to create a server certificate
1472 at installation time.
1474 HS/03 Add -bP config_file as a synonym for -bP configure_file, for consistency
1475 with the $config_file variable.
1477 JH/19 Two additional event types: msg:rcpt:defer and msg:rcpt:host:defer. Both
1478 in transport context, after the attempt, and per-recipient. The latter type
1479 is per host attempted. The event data is the error message, and the errno
1480 information encodes the lookup type (A vs. MX) used for the (first) host,
1481 and the trailing two digits of the smtp 4xx response.
1483 GF/01 Bug 1715: Fix for race condition in exicyclog, where exim could attempt
1484 to write to mainlog (or rejectlog, paniclog) in the window between file
1485 creation and permissions/ownership being changed. Particularly affects
1486 installations where exicyclog is run as root, rather than exim user;
1487 result is that the running daemon panics and dies.
1489 JH/20 Bug 1701: For MySQL lookups, support MySQL config file option group names.
1491 JH/21 Bug 1720: Add support for priority groups and weighted-random proxy
1492 selection for the EXPERIMENTAL_SOCKS feature, via new per-proxy options
1493 "pri" and "weight". Note that the previous implicit priority given by the
1494 list order is no longer honoured.
1496 JH/22 Bugs 963, 1721: Fix some corner cases in message body canonicalization
1497 for DKIM processing.
1499 JH/23 Move SOCKS5 support from Experimental to mainline, enabled for a build
1500 by defining SUPPORT_SOCKS.
1502 JH/26 Move PROXY support from Experimental to mainline, enabled for a build
1503 by defining SUPPORT_PROXY. Note that the proxy_required_hosts option
1504 is renamed to hosts_proxy, and the proxy_{host,target}_{address,port}.
1505 variables are renamed to proxy_{local,external}_{address,port}.
1507 JH/27 Move Internationalisation support from Experimental to mainline, enabled
1508 for a build by defining SUPPORT_I18N
1510 JH/28 Bug 1745: Fix redis lookups to handle (quoted) spaces embedded in parts
1511 of the query string, and make ${quote_redis:} do that quoting.
1513 JH/29 Move Events support from Experimental to mainline, enabled by default
1514 and removable for a build by defining DISABLE_EVENT.
1516 JH/30 Updated DANE implementation code to current from Viktor Dukhovni.
1518 JH/31 Fix bug with hosts_connection_nolog and named-lists which were wrongly
1519 cached by the daemon.
1521 JH/32 Move Redis support from Experimental to mainline, enabled for a build
1522 by defining LOOKUP_REDIS. The libhiredis library is required.
1524 JH/33 Bug 1748: Permit ACL dnslists= condition in non-smtp ACLs if explicit
1525 keys are given for lookup.
1527 JH/34 Bug 1192: replace the embedded copy of PolarSSL RSA routines in the DKIM
1528 support, by using OpenSSL or GnuTLS library ones. This means DKIM is
1529 only supported when built with TLS support. The PolarSSL SHA routines
1530 are still used when the TLS library is too old for convenient support.
1532 JH/35 Require SINGLE_DH_USE by default in OpenSSL (main config option
1533 openssl_options), for security. OpenSSL forces this from version 1.1.0
1534 server-side so match that on older versions.
1536 JH/36 Bug 1778: longstanding bug in memory use by the ${run } expansion: A fresh
1537 allocation for $value could be released as the expansion processing
1538 concluded, but leaving the global pointer active for it.
1540 JH/37 Bug 1769: Permit a VRFY ACL to override the default 252 response,
1541 and to use the domains and local_parts ACL conditions.
1543 JH/38 Fix cutthrough bug with body lines having a single dot. The dot was
1544 incorrectly not doubled on cutthrough transmission, hence seen as a
1545 body-termination at the receiving system - resulting in truncated mails.
1546 Commonly the sender saw a TCP-level error, and retransmitted the message
1547 via the normal store-and-forward channel. This could result in duplicates
1548 received - but deduplicating mailstores were liable to retain only the
1549 initial truncated version.
1551 JH/39 Bug 1781: Fix use of DKIM private-keys having trailing '=' in the base-64.
1553 JH/40 Fix crash in queryprogram router when compiled with EXPERIMENTAL_SRS.
1555 JH/41 Bug 1792: Fix selection of headers to sign for DKIM: bottom-up. While
1556 we're in there, support oversigning also; bug 1309.
1558 JH/42 Bug 1796: Fix error logged on a malware scanner connection failure.
1560 HS/04 Add support for keep_environment and add_environment options.
1562 JH/43 Tidy coding issues detected by gcc --fsanitize=undefined. Some remain;
1563 either intentional arithmetic overflow during PRNG, or testing config-
1566 JH/44 Bug 1800: The combination of a -bhc commandline option and cutthrough
1567 delivery resulted in actual delivery. Cancel cutthrough before DATA
1570 JH/45 Fix cutthrough, when connection not opened by verify and target hard-
1571 rejects a recipient: pass the reject to the originator.
1573 JH/46 Multiple issues raised by Coverity. Some were obvious or plausible bugs.
1574 Many were false-positives and ignorable, but it's worth fixing the
1577 JH/47 Fix build on HP-UX and older Solaris, which need (un)setenv now also
1578 for the new environment-manipulation done at startup. Move the routines
1579 from being local to tls.c to being global via the os.c file.
1581 JH/48 Bug 1807: Fix ${extract } for the numeric/3-string case. While preparsing
1582 an extract embedded as result-arg for a map, the first arg for extract
1583 is unavailable so we cannot tell if this is a numbered or keyed
1584 extraction. Accept either.
1590 JH/01 Bug 1545: The smtp transport option "retry_include_ip_address" is now
1593 JH/02 The smtp transport option "multi_domain" is now expanded.
1595 JH/03 The smtp transport now requests PRDR by default, if the server offers
1598 JH/04 Certificate name checking on server certificates, when exim is a client,
1599 is now done by default. The transport option tls_verify_cert_hostnames
1600 can be used to disable this per-host. The build option
1601 EXPERIMENTAL_CERTNAMES is withdrawn.
1603 JH/05 The value of the tls_verify_certificates smtp transport and main options
1604 default to the word "system" to access the system default CA bundle.
1605 For GnuTLS, only version 3.0.20 or later.
1607 JH/06 Verification of the server certificate for a TLS connection is now tried
1608 (but not required) by default. The verification status is now logged by
1609 default, for both outbound TLS and client-certificate supplying inbound
1612 JH/07 Changed the default rfc1413 lookup settings to disable calls. Few
1615 JH/08 The EXPERIMENTAL_DSN compile option is no longer needed; all Delivery
1616 Status Notification (bounce) messages are now MIME format per RFC 3464.
1617 Support for RFC 3461 DSN options NOTIFY,ENVID,RET,ORCPT can be advertised
1618 under the control of the dsn_advertise_hosts option, and routers may
1619 have a dsn_lasthop option.
1621 JH/09 A timeout of 2 minutes is now applied to all malware scanner types by
1622 default, modifiable by a malware= option. The list separator for
1623 the options can now be changed in the usual way. Bug 68.
1625 JH/10 The smtp_receive_timeout main option is now expanded before use.
1627 JH/11 The incoming_interface log option now also enables logging of the
1628 local interface on delivery outgoing connections.
1630 JH/12 The cutthrough-routing facility now supports multi-recipient mails,
1631 if the interface and destination host and port all match.
1633 JH/13 Bug 344: The verify = reverse_host_lookup ACL condition now accepts a
1636 JH/14 Bug 1573: The spam= ACL condition now additionally supports Rspamd.
1637 Patch from Andrew Lewis.
1639 JH/15 Bug 670: The spamd_address main option (for the spam= ACL condition)
1640 now supports optional time-restrictions, weighting, and priority
1641 modifiers per server. Patch originally by <rommer@active.by>.
1643 JH/16 The spamd_address main option now supports a mixed list of local
1644 and remote servers. Remote servers can be IPv6 addresses, and
1645 specify a port-range.
1647 JH/17 Bug 68: The spamd_address main option now supports an optional
1648 timeout value per server.
1650 JH/18 Bug 1581: Router and transport options headers_add/remove can
1651 now have the list separator specified.
1653 JH/19 Bug 392: spamd_address, and clamd av_scanner, now support retry
1656 JH/20 Bug 1571: Ensure that $tls_in_peerdn is set, when verification fails
1659 JH/21 Support for the A6 type of dns record is withdrawn.
1661 JH/22 Bug 608: The result of a QUIT or not-QUIT toplevel ACL now matters
1662 rather than the verbs used.
1664 JH/23 Bug 1572: Increase limit on SMTP confirmation message copy size
1665 from 255 to 1024 chars.
1667 JH/24 Verification callouts now attempt to use TLS by default.
1669 HS/01 DNSSEC options (dnssec_require_domains, dnssec_request_domains)
1670 are generic router options now. The defaults didn't change.
1672 JH/25 Bug 466: Add RFC2322 support for MIME attachment filenames.
1673 Original patch from Alexander Shikoff, worked over by JH.
1675 HS/02 Bug 1575: exigrep falls back to autodetection of compressed
1676 files if ZCAT_COMMAND is not executable.
1678 JH/26 Bug 1539: Add timeout/retry options on dnsdb lookups.
1680 JH/27 Bug 286: Support SOA lookup in dnsdb lookups.
1682 JH/28 Bug 1588: Do not use the A lookup following an AAAA for setting the FQDN.
1683 Normally benign, it bites when the pair was led to by a CNAME;
1684 modern usage is to not canonicalize the domain to a CNAME target
1685 (and we were inconsistent anyway for A-only vs AAAA+A).
1687 JH/29 Bug 1632: Removed the word "rejected" from line logged for ACL discards.
1689 JH/30 Check the forward DNS lookup for DNSSEC, in addition to the reverse,
1690 when evaluating $sender_host_dnssec.
1692 JH/31 Check the HELO verification lookup for DNSSEC, adding new
1693 $sender_helo_dnssec variable.
1695 JH/32 Bug 1397: Enable ECDHE on OpenSSL, just the NIST P-256 curve.
1697 JH/33 Bug 1346: Note MAIL cmd seen in -bS batch, to avoid smtp_no_mail log.
1699 JH/34 Bug 1648: Fix a memory leak seen with "mailq" and large queues.
1701 JH/35 Bug 1642: Fix support of $spam_ variables at delivery time. Was
1702 documented as working, but never had. Support all but $spam_report.
1704 JH/36 Bug 1659: Guard checking of input smtp commands again pseudo-command
1705 added for tls authenticator.
1707 HS/03 Add perl_taintmode main config option
1713 TL/01 When running the test suite, the README says that variables such as
1714 no_msglog_check are global and can be placed anywhere in a specific
1715 test's script, however it was observed that placement needed to be near
1716 the beginning for it to behave that way. Changed the runtest perl
1717 script to read through the entire script once to detect and set these
1718 variables, reset to the beginning of the script, and then run through
1719 the script parsing/test process like normal.
1721 TL/02 The BSD's have an arc4random API. One of the functions to induce
1722 adding randomness was arc4random_stir(), but it has been removed in
1723 OpenBSD 5.5. Detect this OpenBSD version and skip calling this
1724 function when detected.
1726 JH/01 Expand the EXPERIMENTAL_TPDA feature. Several different events now
1727 cause callback expansion.
1729 TL/03 Bugzilla 1518: Clarify "condition" processing in routers; that
1730 syntax errors in an expansion can be treated as a string instead of
1731 logging or causing an error, due to the internal use of bool_lax
1732 instead of bool when processing it.
1734 JH/02 Add EXPERIMENTAL_DANE, allowing for using the DNS as trust-anchor for
1735 server certificates when making smtp deliveries.
1737 JH/03 Support secondary-separator specifier for MX, SRV, TLSA lookups.
1739 JH/04 Add ${sort {list}{condition}{extractor}} expansion item.
1741 TL/04 Bugzilla 1216: Add -M (related messages) option to exigrep.
1743 TL/05 GitHub Issue 18: Adjust logic testing for true/false in redis lookups.
1744 Merged patch from Sebastian Wiedenroth.
1746 JH/05 Fix results-pipe from transport process. Several recipients, combined
1747 with certificate use, exposed issues where response data items split
1748 over buffer boundaries were not parsed properly. This eventually
1749 resulted in duplicates being sent. This issue only became common enough
1750 to notice due to the introduction of connection certificate information,
1751 the item size being so much larger. Found and fixed by Wolfgang Breyha.
1753 JH/06 Bug 1533: Fix truncation of items in headers_remove lists. A fixed
1754 size buffer was used, resulting in syntax errors when an expansion
1757 JH/07 Add support for directories of certificates when compiled with a GnuTLS
1758 version 3.3.6 or later.
1760 JH/08 Rename the TPDA experimental facility to Event Actions. The #ifdef
1761 is EXPERIMENTAL_EVENT, the main-configuration and transport options
1762 both become "event_action", the variables become $event_name, $event_data
1763 and $event_defer_errno. There is a new variable $verify_mode, usable in
1764 routers, transports and related events. The tls:cert event is now also
1765 raised for inbound connections, if the main configuration event_action
1768 TL/06 In test suite, disable OCSP for old versions of openssl which contained
1769 early OCSP support, but no stapling (appears to be less than 1.0.0).
1771 JH/09 When compiled with OpenSSL and EXPERIMENTAL_CERTNAMES, the checks on
1772 server certificate names available under the smtp transport option
1773 "tls_verify_cert_hostname" now do not permit multi-component wildcard
1776 JH/10 Time-related extraction expansions from certificates now use the main
1777 option "timezone" setting for output formatting, and are consistent
1778 between OpenSSL and GnuTLS compilations. Bug 1541.
1780 JH/11 Fix a crash in mime ACL when meeting a zero-length, quoted or RFC2047-
1781 encoded parameter in the incoming message. Bug 1558.
1783 JH/12 Bug 1527: Autogrow buffer used in reading spool files. Since they now
1784 include certificate info, eximon was claiming there were spoolfile
1787 JH/13 Bug 1521: Fix ldap lookup for single-attr request, multiple-attr return.
1789 JH/14 Log delivery-related information more consistently, using the sequence
1790 "H=<name> [<ip>]" wherever possible.
1792 TL/07 Bug 1547: Omit RFCs from release. Draft and RFCs have licenses which
1793 are problematic for Debian distribution, omit them from the release
1796 JH/15 Updates and fixes to the EXPERIMENTAL_DSN feature.
1798 JH/16 Fix string representation of time values on 64bit time_t architectures.
1801 JH/17 Fix a null-indirection in certextract expansions when a nondefault
1802 output list separator was used.
1807 TL/01 Bugzilla 1506: Re-add a 'return NULL' to silence complaints from static
1808 checkers that were complaining about end of non-void function with no
1811 JH/01 Bug 1513: Fix parsing of quoted parameter values in MIME headers.
1812 This was a regression introduced in 4.83 by another bugfix.
1814 JH/02 Fix broken compilation when EXPERIMENTAL_DSN is enabled.
1816 TL/02 Bug 1509: Fix exipick for enhanced spoolfile specification used when
1817 EXPERIMENTAL_DSN is enabled. Fix from Wolfgang Breyha.
1823 TF/01 Correctly close the server side of TLS when forking for delivery.
1825 When a message was received over SMTP with TLS, Exim failed to clear up
1826 the incoming connection properly after forking off the child process to
1827 deliver the message. In some situations the subsequent outgoing
1828 delivery connection happened to have the same fd number as the incoming
1829 connection previously had. Exim would try to use TLS and fail, logging
1830 a "Bad file descriptor" error.
1832 TF/02 Portability fix for building lookup modules on Solaris when the xpg4
1833 utilities have not been installed.
1835 JH/01 Fix memory-handling in use of acl as a conditional; avoid free of
1836 temporary space as the ACL may create new global variables.
1838 TL/01 LDAP support uses per connection or global context settings, depending
1839 upon the detected version of the libraries at build time.
1841 TL/02 Experimental Proxy Protocol support: allows a proxied SMTP connection
1842 to extract and use the src ip:port in logging and expansions as if it
1843 were a direct connection from the outside internet. PPv2 support was
1844 updated based on HAProxy spec change in May 2014.
1846 JH/02 Add ${listextract {number}{list}{success}{fail}}.
1848 TL/03 Bugzilla 1433: Fix DMARC SEGV with specific From header contents.
1849 Properly escape header and check for NULL return.
1851 PP/01 Continue incomplete 4.82 PP/19 by fixing docs too: use dns_dnssec_ok
1854 JH/03 Bugzilla 1157: support log_selector smtp_confirmation for lmtp.
1856 TL/04 Add verify = header_names_ascii check to reject email with non-ASCII
1857 characters in header names, implemented as a verify condition.
1858 Contributed by Michael Fischer v. Mollard.
1860 TL/05 Rename SPF condition results err_perm and err_temp to standardized
1861 results permerror and temperror. Previous values are deprecated but
1862 still accepted. In a future release, err_perm and err_temp will be
1863 completely removed, which will be a backward incompatibility if the
1864 ACL tests for either of these two old results. Patch contributed by
1865 user bes-internal on the mailing list.
1867 JH/04 Add ${utf8clean:} operator. Contributed by Alex Rau.
1869 JH/05 Bugzilla 305: Log incoming-TLS details on rejects, subject to log
1870 selectors, in both main and reject logs.
1872 JH/06 Log outbound-TLS and port details, subject to log selectors, for a
1875 JH/07 Add malware type "sock" for talking to simple daemon.
1877 JH/08 Bugzilla 1371: Add tls_{,try_}verify_hosts to smtp transport.
1879 JH/09 Bugzilla 1431: Support (with limitations) headers_add/headers_remove in
1880 routers/transports under cutthrough routing.
1882 JH/10 Bugzilla 1005: ACL "condition =" should accept values which are negative
1883 numbers. Touch up "bool" conditional to keep the same definition.
1885 TL/06 Remove duplicated language in spec file from 4.82 TL/16.
1887 JH/11 Add dnsdb tlsa lookup. From Todd Lyons.
1889 JH/12 Expand items in router/transport headers_add or headers_remove lists
1890 individually rather than the list as a whole. Bug 1452.
1892 Required for reasonable handling of multiple headers_ options when
1893 they may be empty; requires that headers_remove items with embedded
1894 colons must have them doubled (or the list-separator changed).
1896 TL/07 Add new dmarc expansion variable $dmarc_domain_policy to directly
1897 view the policy declared in the DMARC record. Currently, $dmarc_status
1898 is a combined value of both the record presence and the result of the
1901 JH/13 Fix handling of $tls_cipher et.al. in (non-verify) transport. Bug 1455.
1903 JH/14 New options dnssec_request_domains, dnssec_require_domains on the
1904 dnslookup router and the smtp transport (applying to the forward
1907 TL/08 Bugzilla 1453: New LDAP "SERVERS=" option allows admin to override list
1908 of ldap servers used for a specific lookup. Patch provided by Heiko
1911 JH/18 New options dnssec_lax, dnssec_strict on dnsdb lookups.
1912 New variable $lookup_dnssec_authenticated for observability.
1914 TL/09 Bugzilla 609: Add -C option to exiqgrep, specify which exim.conf to use.
1915 Patch submitted by Lars Timman.
1917 JH/19 EXPERIMENTAL_OCSP support under GnuTLS. Bug 1459.
1919 TL/10 Bugzilla 1454: New -oMm option to pass message reference to Exim.
1920 Requires trusted mode and valid format message id, aborts otherwise.
1921 Patch contributed by Heiko Schlichting.
1923 JH/20 New expansion variables tls_(in,out)_(our,peer)cert, and expansion item
1924 certextract with support for various fields. Bug 1358.
1926 JH/21 Observability of OCSP via variables tls_(in,out)_ocsp. Stapling
1927 is requested by default, modifiable by smtp transport option
1930 JH/22 Expansion operators ${md5:string} and ${sha1:string} can now
1931 operate on certificate variables to give certificate fingerprints
1932 Also new ${sha256:cert_variable}.
1934 JH/23 The PRDR feature is moved from being Experimental into the mainline.
1936 TL/11 Bug 1119: fix memory allocation in string_printing2(). Patch from
1937 Christian Aistleitner.
1939 JH/24 The OCSP stapling feature is moved from Experimental into the mainline.
1941 TL/12 Bug 1444: Fix improper \r\n sequence handling when writing spool
1942 file. Patch from Wolfgang Breyha.
1944 JH/25 Expand the coverage of the delivery $host and $host_address to
1945 client authenticators run in verify callout. Bug 1476.
1947 JH/26 Port service names are now accepted for tls_on_connect_ports, to
1948 align with daemon_smtp_ports. Bug 72.
1950 TF/03 Fix udpsend. The ip_connectedsocket() function's socket type
1951 support and error reporting did not work properly.
1953 TL/13 Bug 1495: Exiqgrep check if -C config file specified on cli exists
1954 and is readable. Patch from Andrew Colin Kissa.
1956 TL/14 Enhance documentation of ${run expansion and how it parses the
1957 commandline after expansion, particularly in the case when an
1958 unquoted variable expansion results in an empty value.
1960 JH/27 The TLS SNI feature was broken in 4.82. Fix it.
1962 PP/02 Fix internal collision of T_APL on systems which support RFC3123
1963 by renaming away from it. Addresses GH issue 15, reported by
1966 JH/28 Fix parsing of MIME headers for parameters with quoted semicolons.
1968 TL/15 SECURITY: prevent double expansion in math comparison functions
1969 (can expand unsanitized data). Not remotely exploitable.
1976 PP/01 Add -bI: framework, and -bI:sieve for querying sieve capabilities.
1978 PP/02 Make -n do something, by making it not do something.
1979 When combined with -bP, the name of an option is not output.
1981 PP/03 Added tls_dh_min_bits SMTP transport driver option, only honoured
1984 PP/04 First step towards DNSSEC, provide $sender_host_dnssec for
1985 $sender_host_name and config options to manage this, and basic check
1988 PP/05 DSCP support for outbound connections and control modifier for inbound.
1990 PP/06 Cyrus SASL: set local and remote IP;port properties for driver.
1991 (Only plugin which currently uses this is kerberos4, which nobody should
1992 be using, but we should make it available and other future plugins might
1993 conceivably use it, even though it would break NAT; stuff *should* be
1994 using channel bindings instead).
1996 PP/07 Handle "exim -L <tag>" to indicate to use syslog with tag as the process
1997 name; added for Sendmail compatibility; requires admin caller.
1998 Handle -G as equivalent to "control = suppress_local_fixups" (we used to
1999 just ignore it); requires trusted caller.
2000 Also parse but ignore: -Ac -Am -X<logfile>
2003 TL/01 Bugzilla 1258 - Refactor MAIL FROM optional args processing.
2005 TL/02 Add +smtp_confirmation as a default logging option.
2007 TL/03 Bugzilla 198 - Implement remove_header ACL modifier.
2008 Patch by Magnus Holmgren from 2007-02-20.
2010 TL/04 Bugzilla 1281 - Spec typo.
2011 Bugzilla 1283 - Spec typo.
2012 Bugzilla 1290 - Spec grammar fixes.
2014 TL/05 Bugzilla 1285 - Spec omission, fix docbook errors for spec.txt creation.
2016 TL/06 Add Experimental DMARC support using libopendmarc libraries.
2018 TL/07 Fix an out of order global option causing a segfault. Reported to dev
2019 mailing list by by Dmitry Isaikin.
2021 JH/01 Bugzilla 1201 & 304 - New cutthrough-delivery feature, with TLS support.
2023 JH/02 Support "G" suffix to numbers in ${if comparisons.
2025 PP/08 Handle smtp transport tls_sni option forced-fail for OpenSSL.
2027 NM/01 Bugzilla 1197 - Spec typo
2028 Bugzilla 1196 - Spec examples corrections
2030 JH/03 Add expansion operators ${listnamed:name} and ${listcount:string}
2032 PP/09 Add gnutls_allow_auto_pkcs11 option (was originally called
2033 gnutls_enable_pkcs11, but renamed to more accurately indicate its
2036 PP/10 Let Linux makefile inherit CFLAGS/CFLAGS_DYNAMIC.
2037 Pulled from Debian 30_dontoverridecflags.dpatch by Andreas Metzler.
2039 JH/04 Add expansion item ${acl {name}{arg}...}, expansion condition
2040 "acl {{name}{arg}...}", and optional args on acl condition
2043 JH/05 Permit multiple router/transport headers_add/remove lines.
2045 JH/06 Add dnsdb pseudo-lookup "a+" to do an "aaaa" + "a" combination.
2047 JH/07 Avoid using a waiting database for a single-message-only transport.
2048 Performance patch from Paul Fisher. Bugzilla 1262.
2050 JH/08 Strip leading/trailing newlines from add_header ACL modifier data.
2053 JH/09 Add $headers_added variable, with content from use of ACL modifier
2054 add_header (but not yet added to the message). Bugzilla 199.
2056 JH/10 Add 8bitmime log_selector, for 8bitmime status on the received line.
2057 Pulled from Bugzilla 817 by Wolfgang Breyha.
2059 PP/11 SECURITY: protect DKIM DNS decoding from remote exploit.
2061 (nb: this is the same fix as in Exim 4.80.1)
2063 JH/11 Add A= logging on delivery lines, and a client_set_id option on
2066 JH/12 Add optional authenticated_sender logging to A= and a log_selector
2069 PP/12 Unbreak server_set_id for NTLM/SPA auth, broken by 4.80 PP/29.
2071 PP/13 Dovecot auth: log better reason to rejectlog if Dovecot did not
2072 advertise SMTP AUTH mechanism to us, instead of a generic
2073 protocol violation error. Also, make Exim more robust to bad
2074 data from the Dovecot auth socket.
2076 TF/01 Fix ultimate retry timeouts for intermittently deliverable recipients.
2078 When a queue runner is handling a message, Exim first routes the
2079 recipient addresses, during which it prunes them based on the retry
2080 hints database. After that it attempts to deliver the message to
2081 any remaining recipients. It then updates the hints database using
2084 So if a recipient address works intermittently, it can get repeatedly
2085 deferred at routing time. The retry hints record remains fresh so the
2086 address never reaches the final cutoff time.
2088 This is a fairly common occurrence when a user is bumping up against
2089 their storage quota. Exim had some logic in its local delivery code
2090 to deal with this. However it did not apply to per-recipient defers
2091 in remote deliveries, e.g. over LMTP to a separate IMAP message store.
2093 This change adds a proper retry rule check during routing so that the
2094 final cutoff time is checked against the message's age. We only do
2095 this check if there is an address retry record and there is not a
2096 domain retry record; this implies that previous attempts to handle
2097 the address had the retry_use_local_parts option turned on. We use
2098 this as an approximation for the destination being like a local
2099 delivery, as in LMTP.
2101 I suspect this new check makes the old local delivery cutoff check
2102 redundant, but I have not verified this so I left the code in place.
2104 TF/02 Correct gecos expansion when From: is a prefix of the username.
2106 Test 0254 submits a message to Exim with the header
2110 When I ran the test suite under the user fanf2, Exim expanded
2111 the header to contain my full name, whereas it should have added
2112 a Resent-Sender: header. It erroneously treats any prefix of the
2113 username as equal to the username.
2115 This change corrects that bug.
2117 GF/01 DCC debug and logging tidyup
2118 Error conditions log to paniclog rather than rejectlog.
2119 Debug lines prefixed by "DCC: " to remove any ambiguity.
2121 TF/03 Avoid unnecessary rebuilds of lookup-related code.
2123 PP/14 Fix OCSP reinitialisation in SNI handling for Exim/TLS as server.
2124 Bug spotted by Jeremy Harris; was flawed since initial commit.
2125 Would have resulted in OCSP responses post-SNI triggering an Exim
2126 NULL dereference and crash.
2128 JH/13 Add $router_name and $transport_name variables. Bugzilla 308.
2130 PP/15 Define SIOCGIFCONF_GIVES_ADDR for GNU Hurd.
2131 Bug detection, analysis and fix by Samuel Thibault.
2132 Bugzilla 1331, Debian bug #698092.
2134 SC/01 Update eximstats to watch out for senders sending 'HELO [IpAddr]'
2136 JH/14 SMTP PRDR (http://www.eric-a-hall.com/specs/draft-hall-prdr-00.txt).
2137 Server implementation by Todd Lyons, client by JH.
2138 Only enabled when compiled with EXPERIMENTAL_PRDR. A new
2139 config variable "prdr_enable" controls whether the server
2140 advertises the facility. If the client requests PRDR a new
2141 acl_data_smtp_prdr ACL is called once for each recipient, after
2142 the body content is received and before the acl_smtp_data ACL.
2143 The client is controlled by both of: a hosts_try_prdr option
2144 on the smtp transport, and the server advertisement.
2145 Default client logging of deliveries and rejections involving
2146 PRDR are flagged with the string "PRDR".
2148 PP/16 Fix problems caused by timeouts during quit ACLs trying to double
2149 fclose(). Diagnosis by Todd Lyons.
2151 PP/17 Update configure.default to handle IPv6 localhost better.
2152 Patch by Alain Williams (plus minor tweaks).
2155 PP/18 OpenSSL made graceful with empty tls_verify_certificates setting.
2156 This is now consistent with GnuTLS, and is now documented: the
2157 previous undocumented portable approach to treating the option as
2158 unset was to force an expansion failure. That still works, and
2159 an empty string is now equivalent.
2161 PP/19 Renamed DNSSEC-enabling option to "dns_dnssec_ok", to make it
2162 clearer that Exim is using the DO (DNSSEC OK) EDNS0 resolver flag,
2163 not performing validation itself.
2165 PP/20 Added force_command boolean option to pipe transport.
2166 Patch from Nick Koston, of cPanel Inc.
2168 JH/15 AUTH support on callouts (and hence cutthrough-deliveries).
2171 TF/04 Added udpsend ACL modifier and hexquote expansion operator
2173 PP/21 Fix eximon continuous updating with timestamped log-files.
2174 Broken in a format-string cleanup in 4.80, missed when I repaired the
2175 other false fix of the same issue.
2176 Report and fix from Heiko Schlichting.
2179 PP/22 Guard LDAP TLS usage against Solaris LDAP variant.
2180 Report from Prashanth Katuri.
2182 PP/23 Support safari_ecdhe_ecdsa_bug for openssl_options.
2183 It's SecureTransport, so affects any MacOS clients which use the
2184 system-integrated TLS libraries, including email clients.
2186 PP/24 Fix segfault from trying to fprintf() to a NULL stdio FILE* if
2187 using a MIME ACL for non-SMTP local injection.
2188 Report and assistance in diagnosis by Warren Baker.
2190 TL/08 Adjust exiqgrep to be case-insensitive for sender/receiver.
2192 JH/16 Fix comparisons for 64b. Bugzilla 1385.
2194 TL/09 Add expansion variable $authenticated_fail_id to keep track of
2195 last id that failed so it may be referenced in subsequent ACL's.
2197 TL/10 Bugzilla 1375 - Prevent TLS rebinding in ldap. Patch provided by
2200 TL/11 Bugzilla 1382 - Option ldap_require_cert overrides start_tls
2201 ldap library initialization, allowing self-signed CA's to be
2202 used. Also properly sets require_cert option later in code by
2203 using NULL (global ldap config) instead of ldap handle (per
2204 session). Bug diagnosis and testing by alxgomz.
2206 TL/12 Enhanced documentation in the ratelimit.pl script provided in
2207 the src/util/ subdirectory.
2209 TL/13 Bug 1031 - Imported transport SQL logging patch from Axel Rau
2210 renamed to Transport Post Delivery Action by Jeremy Harris, as
2213 TL/14 Bugzilla 1217 - Redis lookup support has been added. It is only enabled
2214 when Exim is compiled with EXPERIMENTAL_REDIS. A new config variable
2215 redis_servers = needs to be configured which will be used by the redis
2216 lookup. Patch from Warren Baker, of The Packet Hub.
2218 TL/15 Fix exiqsumm summary for corner case. Patch provided by Richard Hall.
2220 TL/16 Bugzilla 1289 - Clarify host/ip processing when have errors looking up a
2221 hostname or reverse DNS when processing a host list. Used suggestions
2222 from multiple comments on this bug.
2224 TL/17 Bugzilla 1057 - Multiple clamd TCP targets patch from Mark Zealey.
2226 TL/18 Had previously added a -CONTINUE option to runtest in the test suite.
2227 Missed a few lines, added it to make the runtest require no keyboard
2230 TL/19 Bugzilla 1402 - Test 533 fails if any part of the path to the test suite
2231 contains upper case chars. Make router use caseful_local_part.
2233 TL/20 Bugzilla 1400 - Add AVOID_GNUTLS_PKCS11 build option. Allows GnuTLS
2234 support when GnuTLS has been built with p11-kit.
2240 PP/01 SECURITY: protect DKIM DNS decoding from remote exploit.
2242 This, or similar/improved, will also be change PP/11 of 4.82.
2248 PP/01 Handle short writes when writing local log-files.
2249 In practice, only affects FreeBSD (8 onwards).
2250 Bugzilla 1053, with thanks to Dmitry Isaikin.
2252 NM/01 Bugzilla 949 - Documentation tweak
2254 NM/02 Bugzilla 1093 - eximstats DATA reject detection regexps
2257 NM/03 Bugzilla 1169 - primary_hostname spelling was incorrect in docs.
2259 PP/02 Implemented gsasl authenticator.
2261 PP/03 Implemented heimdal_gssapi authenticator with "server_keytab" option.
2263 PP/04 Local/Makefile support for (AUTH|LOOKUP)_*_PC=foo to use
2264 `pkg-config foo` for cflags/libs.
2266 PP/05 Swapped $auth1/$auth2 for gsasl GSSAPI mechanism, to be more consistent
2267 with rest of GSASL and with heimdal_gssapi.
2269 PP/06 Local/Makefile support for USE_(GNUTLS|OPENSSL)_PC=foo to use
2270 `pkg-config foo` for cflags/libs for the TLS implementation.
2272 PP/07 New expansion variable $tls_bits; Cyrus SASL server connection
2273 properties get this fed in as external SSF. A number of robustness
2274 and debugging improvements to the cyrus_sasl authenticator.
2276 PP/08 cyrus_sasl server now expands the server_realm option.
2278 PP/09 Bugzilla 1214 - Log authentication information in reject log.
2279 Patch by Jeremy Harris.
2281 PP/10 Added dbmjz lookup type.
2283 PP/11 Let heimdal_gssapi authenticator take a SASL message without an authzid.
2285 PP/12 MAIL args handles TAB as well as SP, for better interop with
2286 non-compliant senders.
2287 Analysis and variant patch by Todd Lyons.
2289 NM/04 Bugzilla 1237 - fix cases where printf format usage not indicated
2290 Bug report from Lars Müller <lars@samba.org> (via SUSE),
2291 Patch from Dirk Mueller <dmueller@suse.com>
2293 PP/13 tls_peerdn now print-escaped for spool files.
2294 Observed some $tls_peerdn in wild which contained \n, which resulted
2295 in spool file corruption.
2297 PP/14 TLS fixes for OpenSSL: support TLS 1.1 & 1.2; new "openssl_options"
2298 values; set SSL_MODE_AUTO_RETRY so that OpenSSL will retry a read
2299 or write after TLS renegotiation, which otherwise led to messages
2302 TK/01 Bugzilla 1239 - fix DKIM verification when signature was not inserted
2303 as a tracking header (ie: a signed header comes before the signature).
2304 Patch from Wolfgang Breyha.
2306 JH/01 Bugzilla 660 - Multi-valued attributes from ldap now parseable as a
2307 comma-sep list; embedded commas doubled.
2309 JH/02 Refactored ACL "verify =" logic to table-driven dispatch.
2311 PP/15 LDAP: Check for errors of TLS initialisation, to give correct
2313 Report and patch from Dmitry Banschikov.
2315 PP/16 Removed "dont_insert_empty_fragments" from "openssl_options".
2316 Removed SSL_clear() after SSL_new() which led to protocol negotiation
2317 failures. We appear to now support TLS1.1+ with Exim.
2319 PP/17 OpenSSL: new expansion var $tls_sni, which if used in tls_certificate
2320 lets Exim select keys and certificates based upon TLS SNI from client.
2321 Also option tls_sni on SMTP Transports. Also clear $tls_bits correctly
2322 before an outbound SMTP session. New log_selector, +tls_sni.
2324 PP/18 Bugzilla 1122 - check localhost_number expansion for failure, avoid
2325 NULL dereference. Report and patch from Alun Jones.
2327 PP/19 DNS resolver init changes for NetBSD compatibility. (Risk of breakage
2328 on less well tested platforms). Obviates NetBSD pkgsrc patch-ac.
2329 Not seeing resolver debug output on NetBSD, but suspect this is a
2330 resolver implementation change.
2332 PP/20 Revert part of NM/04, it broke log_path containing %D expansions.
2333 Left warnings. Added "eximon gdb" invocation mode.
2335 PP/21 Defaulting "accept_8bitmime" to true, not false.
2337 PP/22 Added -bw for inetd wait mode support.
2339 PP/23 Added PCRE_CONFIG=yes support to Makefile for using pcre-config to
2340 locate the relevant includes and libraries. Made this the default.
2342 PP/24 Fixed headers_only on smtp transports (was not sending trailing dot).
2343 Bugzilla 1246, report and most of solution from Tomasz Kusy.
2345 JH/03 ${eval } now uses 64-bit and supports a "g" suffix (like to "k" and "m").
2346 This may cause build issues on older platforms.
2348 PP/25 Revamped GnuTLS support, passing tls_require_ciphers to
2349 gnutls_priority_init, ignoring Exim options gnutls_require_kx,
2350 gnutls_require_mac & gnutls_require_protocols (no longer supported).
2351 Added SNI support via GnuTLS too.
2352 Made ${randint:..} supplier available, if using not-too-old GnuTLS.
2354 PP/26 Added EXPERIMENTAL_OCSP for OpenSSL.
2356 PP/27 Applied dnsdb SPF support patch from Janne Snabb.
2357 Applied second patch from Janne, implementing suggestion to default
2358 multiple-strings-in-record handling to match SPF spec.
2360 JH/04 Added expansion variable $tod_epoch_l for a higher-precision time.
2362 PP/28 Fix DCC dcc_header content corruption (stack memory referenced,
2363 read-only, out of scope).
2364 Patch from Wolfgang Breyha, report from Stuart Northfield.
2366 PP/29 Fix three issues highlighted by clang analyser static analysis.
2367 Only crash-plausible issue would require the Cambridge-specific
2368 iplookup router and a misconfiguration.
2369 Report from Marcin Mirosław.
2371 PP/30 Another attempt to deal with PCRE_PRERELEASE, this one less buggy.
2373 PP/31 %D in printf continues to cause issues (-Wformat=security), so for
2374 now guard some of the printf checks behind WANT_DEEPER_PRINTF_CHECKS.
2375 As part of this, removing so much warning spew let me fix some minor
2376 real issues in debug logging.
2378 PP/32 GnuTLS was always using default tls_require_ciphers, due to a missing
2379 assignment on my part. Fixed.
2381 PP/33 Added tls_dh_max_bits option, defaulting to current hard-coded limit
2382 of NSS, for GnuTLS/NSS interop. Problem root cause diagnosis by
2383 Janne Snabb (who went above and beyond: thank you).
2385 PP/34 Validate tls_require_ciphers on startup, since debugging an invalid
2386 string otherwise requires a connection and a bunch more work and it's
2387 relatively easy to get wrong. Should also expose TLS library linkage
2390 PP/35 Pull in <features.h> on Linux, for some portability edge-cases of
2391 64-bit ${eval} (JH/03).
2393 PP/36 Define _GNU_SOURCE in exim.h; it's needed for some releases of
2394 GNU libc to support some of the 64-bit stuff, should not lead to
2395 conflicts. Defined before os.h is pulled in, so if a given platform
2396 needs to override this, it can.
2398 PP/37 Unbreak Cyrus SASL auth: SSF retrieval was incorrect, Exim thought
2399 protection layer was required, which is not implemented.
2400 Bugzilla 1254, patch from Wolfgang Breyha.
2402 PP/38 Overhaul DH prime handling, supply RFC-specified DH primes as built
2403 into Exim, default to IKE id 23 from RFC 5114 (2048 bit). Make
2404 tls_dhparam take prime identifiers. Also unbreak combination of
2405 OpenSSL+DH_params+TLSSNI.
2407 PP/39 Disable SSLv2 by default in OpenSSL support.
2413 PP/01 Solaris build fix for Oracle's LDAP libraries.
2414 Bugzilla 1109, patch from Stephen Usher.
2416 TF/01 HP/UX build fix: avoid arithmetic on a void pointer.
2418 TK/01 DKIM Verification: Fix relaxed canon for empty headers w/o
2421 TF/02 Fix a couple more cases where we did not log the error message
2422 when unlink() failed. See also change 4.74-TF/03.
2424 TF/03 Make the exiwhat support code safe for signals. Previously Exim might
2425 lock up or crash if it happened to be inside a call to libc when it
2426 got a SIGUSR1 from exiwhat.
2428 The SIGUSR1 handler appends the current process status to the process
2429 log which is later printed by exiwhat. It used to use the general
2430 purpose logging code to do this, but several functions it calls are
2431 not safe for signals.
2433 The new output code in the SIGUSR1 handler is specific to the process
2434 log, and simple enough that it's easy to inspect for signal safety.
2435 Removing some special cases also simplifies the general logging code.
2436 Removing the spurious timestamps from the process log simplifies
2439 TF/04 Improved ratelimit ACL condition.
2441 The /noupdate option has been deprecated in favour of /readonly which
2442 has clearer semantics. The /leaky, /strict, and /readonly update modes
2443 are mutually exclusive. The update mode is no longer included in the
2444 database key; it just determines when the database is updated. (This
2445 means that when you upgrade Exim will forget old rate measurements.)
2447 Exim now checks that the per_* options are used with an update mode that
2448 makes sense for the current ACL. For example, when Exim is processing a
2449 message (e.g. acl_smtp_rcpt or acl_smtp_data, etc.) you can specify
2450 per_mail/leaky or per_mail/strict; otherwise (e.g. in acl_smtp_helo) you
2451 must specify per_mail/readonly. If you omit the update mode it defaults to
2452 /leaky where that makes sense (as before) or /readonly where required.
2454 The /noupdate option is now undocumented but still supported for
2455 backwards compatibility. It is equivalent to /readonly except that in
2456 ACLs where /readonly is required you may specify /leaky/noupdate or
2457 /strict/noupdate which are treated the same as /readonly.
2459 A useful new feature is the /count= option. This is a generalization
2460 of the per_byte option, so that you can measure the throughput of other
2461 aggregate values. For example, the per_byte option is now equivalent
2462 to per_mail/count=${if >{0}{$message_size} {0} {$message_size} }.
2464 The per_rcpt option has been generalized using the /count= mechanism
2465 (though it's more complicated than the per_byte equivalence). When it is
2466 used in acl_smtp_rcpt, the per_rcpt option adds recipients to the
2467 measured rate one at a time; if it is used later (e.g. in acl_smtp_data)
2468 or in a non-SMTP ACL it adds all the recipients in one go. (The latter
2469 /count=$recipients_count behaviour used to work only in non-SMTP ACLs.)
2470 Note that using per_rcpt with a non-readonly update mode in more than
2471 one ACL will cause the recipients to be double-counted. (The per_mail
2472 and per_byte options don't have this problem.)
2474 The handling of very low rates has changed slightly. If the computed rate
2475 is less than the event's count (usually one) then this event is the first
2476 after a long gap. In this case the rate is set to the same as this event's
2477 count, so that the first message of a spam run is counted properly.
2479 The major new feature is a mechanism for counting the rate of unique
2480 events. The new per_addr option counts the number of different
2481 recipients that someone has sent messages to in the last time period. It
2482 behaves like per_rcpt if all the recipient addresses are different, but
2483 duplicate recipient addresses do not increase the measured rate. Like
2484 the /count= option this is a general mechanism, so the per_addr option
2485 is equivalent to per_rcpt/unique=$local_part@$domain. You can, for
2486 example, measure the rate that a client uses different sender addresses
2487 with the options per_mail/unique=$sender_address. There are further
2488 details in the main documentation.
2490 TF/05 Removed obsolete $Cambridge$ CVS revision strings.
2492 TF/06 Removed a few PCRE remnants.
2494 TF/07 Automatically extract Exim's version number from tags in the git
2495 repository when doing development or release builds.
2497 PP/02 Raise smtp_cmd_buffer_size to 16kB.
2498 Bugzilla 879. Patch from Paul Fisher.
2500 PP/03 Implement SSL-on-connect outbound with protocol=smtps on smtp transport.
2501 Heavily based on revision 40f9a89a from Simon Arlott's tree.
2504 PP/04 Use .dylib instead of .so for dynamic library loading on MacOS.
2506 PP/05 Variable $av_failed, true if the AV scanner deferred.
2507 Bugzilla 1078. Patch from John Horne.
2509 PP/06 Stop make process more reliably on build failure.
2510 Bugzilla 1087. Patch from Heiko Schlittermann.
2512 PP/07 Make maildir_use_size_file an _expandable_ boolean.
2513 Bugzilla 1089. Patch from Heiko Schlittermann.
2515 PP/08 Handle ${run} returning more data than OS pipe buffer size.
2516 Bugzilla 1131. Patch from Holger Weiß.
2518 PP/09 Handle IPv6 addresses with SPF.
2519 Bugzilla 860. Patch from Wolfgang Breyha.
2521 PP/10 GnuTLS: support TLS 1.2 & 1.1.
2523 Use gnutls_certificate_verify_peers2() [patch from Andreas Metzler].
2526 PP/11 match_* no longer expand right-hand-side by default.
2527 New compile-time build option, EXPAND_LISTMATCH_RHS.
2528 New expansion conditions, "inlist", "inlisti".
2530 PP/12 fix uninitialised greeting string from PP/03 (smtps client support).
2532 PP/13 shell and compiler warnings fixes for RC1-RC4 changes.
2534 PP/14 fix log_write() format string regression from TF/03.
2535 Bugzilla 1152. Patch from Dmitry Isaikin.
2541 PP/01 The new ldap_require_cert option would segfault if used. Fixed.
2543 PP/02 Harmonised TLS library version reporting; only show if debugging.
2544 Layout now matches that introduced for other libraries in 4.74 PP/03.
2546 PP/03 New openssl_options items: no_sslv2 no_sslv3 no_ticket no_tlsv1
2548 PP/04 New "dns_use_edns0" global option.
2550 PP/05 Don't segfault on misconfiguration of ref:name exim-user as uid.
2553 PP/06 Extra paranoia around buffer usage at the STARTTLS transition.
2554 nb: Exim is not vulnerable to http://www.kb.cert.org/vuls/id/555316
2556 TK/01 Updated PolarSSL code to 0.14.2.
2557 Bugzilla 1097. Patch from Andreas Metzler.
2559 PP/07 Catch divide-by-zero in ${eval:...}.
2560 Fixes bugzilla 1102.
2562 PP/08 Condition negation of bool{}/bool_lax{} did not negate. Fixed.
2565 TK/02 Bugzilla 1106: CVE-2011-1764 - DKIM log line was subject to a
2566 format-string attack -- SECURITY: remote arbitrary code execution.
2568 TK/03 SECURITY - DKIM signature header parsing was double-expanded, second
2569 time unintentionally subject to list matching rules, letting the header
2570 cause arbitrary Exim lookups (of items which can occur in lists, *not*
2571 arbitrary string expansion). This allowed for information disclosure.
2573 PP/09 Fix another SIGFPE (x86) in ${eval:...} expansion, this time related to
2574 INT_MIN/-1 -- value coerced to INT_MAX.
2580 NM/01 Workaround for PCRE version dependency in version reporting
2583 TF/01 Update valgrind.h and memcheck.h to copies from valgrind-3.6.0.
2584 This fixes portability to compilers other than gcc, notably
2585 Solaris CC and HP-UX CC. Fixes Bugzilla 1050.
2587 TF/02 Bugzilla 139: Avoid using the += operator in the modular lookup
2588 makefiles for portability to HP-UX and POSIX correctness.
2590 PP/01 Permit LOOKUP_foo enabling on the make command-line.
2591 Also via indented variable definition in the Makefile.
2592 (Debugging by Oliver Heesakkers).
2594 PP/02 Restore caching of spamd results with expanded spamd_address.
2595 Patch from author of expandable spamd_address patch, Wolfgang Breyha.
2597 PP/03 Build issue: lookups-Makefile now exports LC_ALL=C
2598 Improves build reliability. Fix from: Frank Elsner
2600 NM/02 Fix wide character breakage in the rfc2047 coding
2601 Fixes bug 1064. Patch from Andrey N. Oktyabrski
2603 NM/03 Allow underscore in dnslist lookups
2604 Fixes bug 1026. Patch from Graeme Fowler
2606 PP/04 Bugzilla 230: Support TLS-enabled LDAP (in addition to ldaps).
2607 Code patches from Adam Ciarcinski of NetBSD.
2609 NM/04 Fixed exiqgrep to cope with mailq missing size issue
2612 PP/05 Bugzilla 1083: when lookup expansion defers, escape the output which
2613 is logged, to avoid truncation. Patch from John Horne.
2615 PP/06 Bugzilla 1042: implement freeze_signal on pipe transports.
2616 Patch from Jakob Hirsch.
2618 PP/07 Bugzilla 1061: restrict error messages sent over SMTP to not reveal
2619 SQL string expansion failure details.
2620 Patch from Andrey Oktyabrski.
2622 PP/08 Bugzilla 486: implement %M datestamping in log filenames.
2623 Patch from Simon Arlott.
2625 PP/09 New lookups functionality failed to compile on old gcc which rejects
2626 extern declarations in function scope.
2627 Patch from Oliver Fleischmann
2629 PP/10 Use sig_atomic_t for flags set from signal handlers.
2630 Check getgroups() return and improve debugging.
2631 Fixed developed for diagnosis in bug 927 (which turned out to be
2634 PP/11 Bugzilla 1055: Update $message_linecount for maildir_tag.
2635 Patch from Mark Zealey.
2637 PP/12 Bugzilla 1056: Improved spamd server selection.
2638 Patch from Mark Zealey.
2640 PP/13 Bugzilla 1086: Deal with maildir quota file races.
2641 Based on patch from Heiko Schlittermann.
2643 PP/14 Bugzilla 1019: DKIM multiple signature generation fix.
2644 Patch from Uwe Doering, sign-off by Michael Haardt.
2646 NM/05 Fix to spam.c to accommodate older gcc versions which dislike
2647 variable declaration deep within a block. Bug and patch from
2650 PP/15 lookups-Makefile IRIX compatibility coercion.
2652 PP/16 Make DISABLE_DKIM build knob functional.
2654 NM/06 Bugzilla 968: child_open_uid: restore default SIGPIPE handler
2655 Patch by Simon Arlott
2657 TF/03 Fix valgrind.h portability to C89 compilers that do not support
2658 variable argument macros. Our copy now differs from upstream.
2664 TF/01 Failure to get a lock on a hints database can have serious
2665 consequences so log it to the panic log.
2667 TF/02 Log LMTP confirmation messages in the same way as SMTP,
2668 controlled using the smtp_confirmation log selector.
2670 TF/03 Include the error message when we fail to unlink a spool file.
2672 DW/01 Bugzilla 139: Support dynamically loaded lookups as modules.
2673 With thanks to Steve Haslam, Johannes Berg & Serge Demonchaux
2674 for maintaining out-of-tree patches for some time.
2676 PP/01 Bugzilla 139: Documentation and portability issues.
2677 Avoid GNU Makefile-isms, let Exim continue to build on BSD.
2678 Handle per-OS dynamic-module compilation flags.
2680 PP/02 Let /dev/null have normal permissions.
2681 The 4.73 fixes were a little too stringent and complained about the
2682 permissions on /dev/null. Exempt it from some checks.
2683 Reported by Andreas M. Kirchwitz.
2685 PP/03 Report version information for many libraries, including
2686 Exim version information for dynamically loaded libraries. Created
2687 version.h, now support a version extension string for distributors
2688 who patch heavily. Dynamic module ABI change.
2690 PP/04 CVE-2011-0017 - check return value of setuid/setgid. This is a
2691 privilege escalation vulnerability whereby the Exim run-time user
2692 can cause root to append content of the attacker's choosing to
2695 PP/05 Bugzilla 1041: merged DCC maintainer's fixes for return code.
2698 PP/06 Bugzilla 1071: fix delivery logging with untrusted macros.
2699 If dropping privileges for untrusted macros, we disabled normal logging
2700 on the basis that it would fail; for the Exim run-time user, this is not
2701 the case, and it resulted in successful deliveries going unlogged.
2702 Fixed. Reported by Andreas Metzler.
2708 PP/01 Date: & Message-Id: revert to normally being appended to a message,
2709 only prepend for the Resent-* case. Fixes regression introduced in
2710 Exim 4.70 by NM/22 for Bugzilla 607.
2712 PP/02 Include check_rfc2047_length in configure.default because we're seeing
2713 increasing numbers of administrators be bitten by this.
2715 JJ/01 Added DISABLE_DKIM and comment to src/EDITME
2717 PP/03 Bugzilla 994: added openssl_options main configuration option.
2719 PP/04 Bugzilla 995: provide better SSL diagnostics on failed reads.
2721 PP/05 Bugzilla 834: provide a permit_coredump option for pipe transports.
2723 PP/06 Adjust NTLM authentication to handle SASL Initial Response.
2725 PP/07 If TLS negotiated an anonymous cipher, we could end up with SSL but
2726 without a peer certificate, leading to a segfault because of an
2727 assumption that peers always have certificates. Be a little more
2728 paranoid. Problem reported by Martin Tscholak.
2730 PP/08 Bugzilla 926: switch ClamAV to use the new zINSTREAM API for content
2731 filtering; old API available if built with WITH_OLD_CLAMAV_STREAM=yes
2732 NB: ClamAV planning to remove STREAM in "middle of 2010".
2733 CL also introduces -bmalware, various -d+acl logging additions and
2734 more caution in buffer sizes.
2736 PP/09 Implemented reverse_ip expansion operator.
2738 PP/10 Bugzilla 937: provide a "debug" ACL control.
2740 PP/11 Bugzilla 922: Documentation dusting, patch provided by John Horne.
2742 PP/12 Bugzilla 973: Implement --version.
2744 PP/13 Bugzilla 752: Refuse to build/run if Exim user is root/0.
2746 PP/14 Build without WITH_CONTENT_SCAN. Path from Andreas Metzler.
2748 PP/15 Bugzilla 816: support multiple condition rules on Routers.
2750 PP/16 Add bool_lax{} expansion operator and use that for combining multiple
2751 condition rules, instead of bool{}. Make both bool{} and bool_lax{}
2752 ignore trailing whitespace.
2754 JJ/02 prevent non-panic DKIM error from being sent to paniclog
2756 JJ/03 added tcp_wrappers_daemon_name to allow host entries other than
2759 PP/17 Fix malware regression for cmdline scanner introduced in PP/08.
2760 Notification from Dr Andrew Aitchison.
2762 PP/18 Change ClamAV response parsing to be more robust and to handle ClamAV's
2763 ExtendedDetectionInfo response format.
2764 Notification from John Horne.
2766 PP/19 OpenSSL 1.0.0a compatibility const-ness change, should be backwards
2769 PP/20 Added a CONTRIBUTING file. Fixed the documentation build to use http:
2770 XSL and documented dependency on system catalogs, with examples of how
2773 DW/21 Added Valgrind hooks in store.c to help it capture out-of-bounds store
2776 DW/22 Bugzilla 1044: CVE-2010-4345 - partial fix: restrict default behaviour
2777 of CONFIGURE_OWNER and CONFIGURE_GROUP options to no longer allow a
2778 configuration file which is writeable by the Exim user or group.
2780 DW/23 Bugzilla 1044: CVE-2010-4345 - part two: extend checks for writeability
2781 of configuration files to cover files specified with the -C option if
2782 they are going to be used with root privileges, not just the default
2785 DW/24 Bugzilla 1044: CVE-2010-4345 - part three: remove ALT_CONFIG_ROOT_ONLY
2786 option (effectively making it always true).
2788 DW/25 Add TRUSTED_CONFIG_PREFIX_FILE option to allow alternative configuration
2789 files to be used while preserving root privileges.
2791 DW/26 Set FD_CLOEXEC on SMTP sockets after forking in the daemon, to ensure
2792 that rogue child processes cannot use them.
2794 PP/27 Bugzilla 1047: change the default for system_filter_user to be the Exim
2795 run-time user, instead of root.
2797 PP/28 Add WHITELIST_D_MACROS option to let some macros be overridden by the
2798 Exim run-time user without dropping privileges.
2800 DW/29 Remove use of va_copy() which breaks pre-C99 systems. Duplicate the
2801 result string, instead of calling string_vformat() twice with the same
2804 DW/30 Allow TRUSTED_CONFIG_PREFIX_FILE only for Exim or CONFIGURE_OWNER, not
2805 for other users. Others should always drop root privileges if they use
2806 -C on the command line, even for a whitelisted configure file.
2808 DW/31 Turn TRUSTED_CONFIG_PREFIX_FILE into TRUSTED_CONFIG_FILE. No prefixes.
2810 NM/01 Fixed bug #1002 - Message loss when using multiple deliveries
2816 JJ/01 installed exipick 20100104.1, adding $max_received_linelength,
2817 $data_path, and $header_path variables; fixed documentation bugs and
2820 JJ/02 installed exipick 20100222.0, added --input-dir and --finput to allow
2821 exipick to access non-standard spools, including the "frozen" queue
2824 NM/01 Bugzilla 965: Support mysql stored procedures.
2825 Patch from Alain Williams
2827 NM/02 Bugzilla 961: Spacing fix (syntax error) on Makefile directives for NetBSD
2829 NM/03 Bugzilla 955: Documentation fix for max_rcpts.
2830 Patch from Andreas Metzler
2832 NM/04 Bugzilla 954: Fix for unknown responses from Dovecot authenticator.
2833 Patch from Kirill Miazine
2835 NM/05 Bugzilla 671: Added umask to procmail example.
2837 JJ/03 installed exipick 20100323.0, fixing doc bug
2839 NM/06 Bugzilla 988: CVE-2010-2023 - prevent hardlink attack on sticky mail
2840 directory. Notification and patch from Dan Rosenberg.
2842 TK/01 PDKIM: Upgrade PolarSSL files to upstream version 0.12.1.
2844 TK/02 Improve log output when DKIM signing operation fails.
2846 MH/01 Treat the transport option dkim_domain as a colon separated
2847 list, not as a single string, and sign the message with each element,
2848 omitting multiple occurences of the same signer.
2850 NM/07 Null terminate DKIM strings, Null initialise DKIM variable
2851 Bugzilla 985, 986. Patch by Simon Arlott
2853 NM/08 Bugzilla 967. dnsdb DNS TXT record bug fix (DKIM-related)
2854 Patch by Simon Arlott
2856 PP/01 Bugzilla 989: CVE-2010-2024 - work round race condition on
2857 MBX locking. Notification from Dan Rosenberg.
2863 TK/01 Bugzilla 912: Fix DKIM segfault on empty headers/body.
2865 NM/01 Bugzilla 913: Documentation fix for gnutls_* options.
2867 NM/02 Bugzilla 722: Documentation for randint. Better randomness defaults.
2869 NM/03 Bugzilla 847: Enable DNSDB lookup by default.
2871 NM/04 Bugzilla 915: Flag broken perl installation during build.
2877 TK/01 Added patch by Johannes Berg that expands the main option
2878 "spamd_address" if it starts with a dollar sign.
2880 TK/02 Write list of recipients to X-Envelope-Sender header when building
2881 the mbox-format spool file for content scanning (suggested by Jakob
2884 TK/03 Added patch by Wolfgang Breyha that adds experimental DCC
2885 (http://www.dcc-servers.net/) support via dccifd. Activated by
2886 setting EXPERIMENTAL_DCC=yes in Local/Makefile.
2888 TK/04 Bugzilla 673: Add f-protd malware scanner support. Patch submitted
2889 by Mark Daniel Reidel <mr@df.eu>.
2891 NM/01 Bugzilla 657: Embedded PCRE removed from the exim source tree.
2892 When building exim an external PCRE library is now needed -
2893 PCRE is a system library on the majority of modern systems.
2894 See entry on PCRE_LIBS in EDITME file.
2896 NM/02 Bugzilla 646: Removed unwanted C/R in Dovecot authenticator
2897 conversation. Added nologin parameter to request.
2898 Patch contributed by Kirill Miazine.
2900 TF/01 Do not log submission mode rewrites if they do not change the address.
2902 TF/02 Bugzilla 662: Fix stack corruption before exec() in daemon.c.
2904 NM/03 Bugzilla 602: exicyclog now handles panic log, and creates empty
2905 log files in place. Contributed by Roberto Lima.
2907 NM/04 Bugzilla 667: Close socket used by dovecot authenticator.
2909 TF/03 Bugzilla 615: When checking the local_parts router precondition
2910 after a local_part_suffix or local_part_prefix option, Exim now
2911 does not use the address's named list lookup cache, since this
2912 contains cached lookups for the whole local part.
2914 NM/05 Bugzilla 521: Integrated SPF Best Guess support contributed by
2915 Robert Millan. Documentation is in experimental-spec.txt.
2917 TF/04 Bugzilla 668: Fix parallel build (make -j).
2919 NM/05.2 Bugzilla 437: Prevent Maildir aux files being created with mode 000.
2921 NM/05.3 Bugzilla 598: Improvement to Dovecot authenticator handling.
2922 Patch provided by Jan Srzednicki.
2924 TF/05 Leading white space used to be stripped from $spam_report which
2925 wrecked the formatting. Now it is preserved.
2927 TF/06 Save $spam_score, $spam_bar, and $spam_report in spool files, so
2928 that they are available at delivery time.
2930 TF/07 Fix the way ${extract is skipped in the untaken branch of a conditional.
2932 TF/08 TLS error reporting now respects the incoming_interface and
2933 incoming_port log selectors.
2935 TF/09 Produce a more useful error message if an SMTP transport's hosts
2936 setting expands to an empty string.
2938 NM/06 Bugzilla 744: EXPN did not work under TLS.
2939 Patch provided by Phil Pennock.
2941 NM/07 Bugzilla 769: Extraneous comma in usage fprintf
2942 Patch provided by Richard Godbee.
2944 NM/08 Fixed erroneous documentation references to smtp_notquit_acl to be
2945 acl_smtp_notquit, added index entry.
2947 NM/09 Bugzilla 787: Potential buffer overflow in string_format.
2948 Patch provided by Eugene Bujak.
2950 NM/10 Bugzilla 770: Problem on some platforms modifying the len parameter to
2951 accept(). Patch provided by Maxim Dounin.
2953 NM/11 Bugzilla 749: Preserve old behaviour of blanks comparing equal to zero.
2954 Patch provided by Phil Pennock.
2956 NM/12 Bugzilla 497: Correct behaviour of exiwhat when no config exists.
2958 NM/13 Bugzilla 590: Correct handling of Resent-Date headers.
2959 Patch provided by Brad "anomie" Jorsch.
2961 NM/14 Bugzilla 622: Added timeout setting to transport filter.
2962 Patch provided by Dean Brooks.
2964 TK/05 Add native DKIM support (does not depend on external libraries).
2966 NM/15 Bugzilla 854: Removed code that symlinks to pcre as its no longer useful.
2967 Patch provided by Graeme Fowler.
2969 NM/16 Bugzilla 851: Documentation example syntax fix.
2971 NM/17 Changed NOTICE file to remove references to embedded PCRE.
2973 NM/18 Bugzilla 894: Fix issue with very long lines including comments in
2976 NM/19 Bugzilla 745: TLS version reporting.
2977 Patch provided by Phil Pennock.
2979 NM/20 Bugzilla 167: bool: condition support.
2980 Patch provided by Phil Pennock.
2982 NM/21 Bugzilla 665: gnutls_compat_mode to allow compatibility with broken
2983 clients. Patch provided by Phil Pennock.
2985 NM/22 Bugzilla 607: prepend (not append) Resent-Message-ID and Resent-Date.
2986 Patch provided by Brad "anomie" Jorsch.
2988 NM/23 Bugzilla 687: Fix misparses in eximstats.
2989 Patch provided by Heiko Schlittermann.
2991 NM/24 Bugzilla 688: Fix exiwhat to handle log_selector = +pid.
2992 Patch provided by Heiko Schlittermann.
2994 NM/25 Bugzilla 727: Use transport mode as default mode for maildirsize file.
2995 plus update to original patch.
2997 NM/26 Bugzilla 799: Documentation correction for ratelimit.
2999 NM/27 Bugzilla 802: Improvements to local interface IP addr detection.
3000 Patch provided by David Brownlee.
3002 NM/28 Bugzilla 807: Improvements to LMTP delivery logging.
3004 NM/29 Bugzilla 862, 866, 875: Documentation bugfixes.
3006 NM/30 Bugzilla 888: TLS documentation bugfixes.
3008 NM/31 Bugzilla 896: Dovecot buffer overrun fix.
3010 NM/32 Bugzilla 889: Change all instances of "expr" in shell scripts to "expr --"
3011 Unlike the original bugzilla I have changed all shell scripts in src tree.
3013 NM/33 Bugzilla 898: Transport filter timeout fix.
3014 Patch by Todd Rinaldo.
3016 NM/34 Bugzilla 901: Fix sign/unsigned and UTF mismatches.
3017 Patch by Serge Demonchaux.
3019 NM/35 Bugzilla 39: Base64 decode bug fixes.
3020 Patch by Jakob Hirsch.
3022 NM/36 Bugzilla 909: Correct connect() call in dcc code.
3024 NM/37 Bugzilla 910: Correct issue with relaxed/simple handling.
3026 NM/38 Bugzilla 908: Removed NetBSD3 support as no longer needed.
3028 NM/39 Bugzilla 911: Fixed MakeLinks build script.
3034 TK/01 Add preliminary DKIM support. Currently requires a forked version of
3035 ALT-N's libdkim that I have put here:
3036 http://duncanthrax.net/exim-experimental/
3038 Note to Michael Haardt: I had to rename some vars in sieve.c. They
3039 were called 'true' and it seems that C99 defines that as a reserved
3040 keyword to be used with 'bool' variable types. That means you could
3041 not include C99-style headers which use bools without triggering
3042 build errors in sieve.c.
3044 NM/01 Bugzilla 592: --help option is handled incorrectly if exim is invoked
3045 as mailq or other aliases. Changed the --help handling significantly
3046 to do whats expected. exim_usage() emits usage/help information.
3048 SC/01 Added the -bylocaldomain option to eximstats.
3050 NM/02 Bugzilla 619: Defended against bad data coming back from gethostbyaddr.
3052 NM/03 Bugzilla 613: Documentation fix for acl_not_smtp.
3054 NM/04 Bugzilla 628: PCRE update to 7.4 (work done by John Hall).
3060 PH/01 Another patch from the Sieve maintainer.
3062 PH/02 When an IPv6 address is converted to a string for single-key lookup
3063 in an address list (e.g. for an item such as "net24-dbm;/net/works"),
3064 dots are used instead of colons so that keys in lsearch files need not
3065 contain colons. This was done some time before quoting was made available
3066 in lsearch files. However, iplsearch files do require colons in IPv6 keys
3067 (notated using the quote facility) so as to distinguish them from IPv4
3068 keys. This meant that lookups for IP addresses in host lists did not work
3069 for iplsearch lookups.
3071 This has been fixed by arranging for IPv6 addresses to be expressed with
3072 colons if the lookup type is iplsearch. This is not incompatible, because
3073 previously such lookups could never work.
3075 The situation is now rather anomalous, since one *can* have colons in
3076 ordinary lsearch keys. However, making the change in all cases is
3077 incompatible and would probably break a number of configurations.
3079 TK/01 Change PRVS address formatting scheme to reflect latests BATV draft
3082 MH/01 The "spam" ACL condition code contained a sscanf() call with a %s
3083 conversion specification without a maximum field width, thereby enabling
3084 a rogue spamd server to cause a buffer overflow. While nobody in their
3085 right mind would setup Exim to query an untrusted spamd server, an
3086 attacker that gains access to a server running spamd could potentially
3087 exploit this vulnerability to run arbitrary code as the Exim user.
3089 TK/02 Bugzilla 502: Apply patch to make the SPF-Received: header use
3090 $primary_hostname instead of what libspf2 thinks the hosts name is.
3092 MH/02 The dsearch lookup now uses lstat(2) instead of stat(2) to look for
3093 a directory entry by the name of the lookup key. Previously, if a
3094 symlink pointed to a non-existing file or a file in a directory that
3095 Exim lacked permissions to read, a lookup for a key matching that
3096 symlink would fail. Now it is enough that a matching directory entry
3097 exists, symlink or not. (Bugzilla 503.)
3099 PH/03 The body_linecount and body_zerocount variables are now exported in the
3102 PH/04 Added the $dnslist_matched variable.
3104 PH/05 Unset $tls_cipher and $tls_peerdn before making a connection as a client.
3105 This means they are set thereafter only if the connection becomes
3108 PH/06 Added the client_condition to authenticators so that some can be skipped
3109 by clients under certain conditions.
3111 PH/07 The error message for a badly-placed control=no_multiline_responses left
3112 "_responses" off the end of the name.
3114 PH/08 Added -Mvc to output a copy of a message in RFC 2822 format.
3116 PH/09 Tidied the code for creating ratelimiting keys, creating them explicitly
3117 (without spaces) instead of just copying the configuration text.
3119 PH/10 Added the /noupdate option to the ratelimit ACL condition.
3121 PH/11 Added $max_received_linelength.
3123 PH/12 Added +ignore_defer and +include_defer to host lists.
3125 PH/13 Installed PCRE version 7.2. This needed some changes because of the new
3126 way in which PCRE > 7.0 is built.
3128 PH/14 Implemented queue_only_load_latch.
3130 PH/15 Removed an incorrect (int) cast when reading the value of SIZE in a
3131 MAIL command. The effect was to mangle the value on 64-bit systems.
3133 PH/16 Another patch from the Sieve maintainer.
3135 PH/17 Added the NOTQUIT ACL, based on a patch from Ted Cooper.
3137 PH/18 If a system quota error occurred while trying to create the file for
3138 a maildir delivery, the message "Mailbox is full" was not appended to the
3139 bounce if the delivery eventually timed out. Change 4.67/27 below applied
3140 only to a quota excession during the actual writing of the file.
3142 PH/19 It seems that peer DN values may contain newlines (and other non-printing
3143 characters?) which causes problems in log lines. The DN values are now
3144 passed through string_printing() before being added to log lines.
3146 PH/20 Added the "servers=" facility to MySQL and PostgreSQL lookups. (Oracle
3147 and InterBase are left for another time.)
3149 PH/21 Added message_body_newlines option.
3151 PH/22 Guard against possible overflow in moan_check_errorcopy().
3153 PH/23 POSIX allows open() to be a macro; guard against that.
3155 PH/24 If the recipient of an error message contained an @ in the local part
3156 (suitably quoted, of course), incorrect values were put in $domain and
3157 $local_part during the evaluation of errors_copy.
3163 MH/01 Fix for bug #448, segfault in Dovecot authenticator when interface_address
3164 is unset (happens when testing with -bh and -oMi isn't used). Thanks to
3167 PH/01 Added a new log selector smtp_no_mail, to log SMTP sessions that do not
3168 issue a MAIL command.
3170 PH/02 In an ACL statement such as
3172 deny dnslists = X!=127.0.0.2 : X=127.0.0.2
3174 if a client was not listed at all, or was listed with a value other than
3175 127.0.0.2, in the X list, but was listed with 127.0.0.2 in the Y list,
3176 the condition was not true (as it should be), so access was not denied.
3177 The bug was that the ! inversion was incorrectly passed on to the second
3178 item. This has been fixed.
3180 PH/03 Added additional dnslists conditions == and =& which are different from
3181 = and & when the dns lookup returns more than one IP address.
3183 PH/04 Added gnutls_require_{kx,mac,protocols} to give more control over the
3184 cipher suites used by GnuTLS. These options are ignored by OpenSSL.
3186 PH/05 After discussion on the list, added a compile time option ENABLE_DISABLE_
3187 FSYNC, which compiles an option called disable_fsync that allows for
3188 bypassing fsync(). The documentation is heavily laced with warnings.
3190 SC/01 Updated eximstats to collate all SpamAssassin rejects into one bucket.
3192 PH/06 Some tidies to the infrastructure of the Test Suite that is concerned
3193 with the auxiliary C programs that it uses: (1) Arrange for BIND_8_COMPAT
3194 to be defined when compiling on OSX (Darwin); (2) Tidies to the Makefile,
3195 including adding "make clean"; (3) Added -fPIC when compiling the test
3196 dynamically loaded module, to get rid of a warning.
3198 MH/02 Fix for bug #451, causing paniclog entries to be written if a bounce
3199 message fails, move_frozen_messages = true and ignore_bounce_errors_after
3200 = 0s. The bug is otherwise harmless.
3202 PH/07 There was a bug in the dovecot authenticator such that the value of
3203 $auth1 could be overwritten, and so not correctly preserved, after a
3204 successful authentication. This usually meant that the value preserved by
3205 the server_setid option was incorrect.
3207 PH/08 Added $smtp_count_at_connection_start, deliberately with a long name.
3209 PH/09 Installed PCRE release 7.0.
3211 PH/10 The acl_not_smtp_start ACL was, contrary to the documentation, not being
3212 run for batched SMTP input. It is now run at the start of every message
3213 in the batch. While fixing this I discovered that the process information
3214 (output by running exiwhat) was not always getting set for -bs and -bS
3215 input. This is fixed, and it now also says "batched" for BSMTP.
3217 PH/11 Added control=no_pipelining.
3219 PH/12 Added $sending_ip_address and $sending_port (mostly Magnus Holmgren's
3220 patch, slightly modified), and move the expansion of helo_data till after
3221 the connection is made in the smtp transport (so it can use these
3224 PH/13 Added ${rfc2047d: to decoded RFC 2047 strings.
3226 PH/14 Added log_selector = +pid.
3228 PH/15 Flush SMTP output before delaying, unless control=no_delay_flush is set.
3230 PH/16 Add ${if forany and ${if forall.
3232 PH/17 Added dsn_from option to vary the From: line in DSNs.
3234 PH/18 Flush SMTP output before performing a callout, unless control =
3235 no_callout_flush is set.
3237 PH/19 Change 4.64/PH/36 introduced a bug: when address_retry_include_sender
3238 was true (the default) a successful delivery failed to delete the retry
3239 item, thus causing premature timeout of the address. The bug is now
3242 PH/20 Added hosts_avoid_pipelining to the smtp transport.
3244 PH/21 Long custom messages for fakedefer and fakereject are now split up
3245 into multiline responses in the same way that messages for "deny" and
3246 other ACL rejections are.
3248 PH/22 Applied Jori Hamalainen's speed-up changes and typo fixes to exigrep,
3249 with slight modification.
3251 PH/23 Applied sieve patches from the maintainer "tracking the latest notify
3252 draft, changing the syntax and factoring some duplicate code".
3254 PH/24 When the log selector "outgoing_port" was set, the port was shown as -1
3255 for deliveries of the second and subsequent messages over the same SMTP
3258 PH/25 Applied Magnus Holmgren's patch for ${addresses, ${map, ${filter, and
3259 ${reduce, with only minor "tidies".
3261 SC/02 Applied Daniel Tiefnig's patch to improve the '($parent) =' pattern match.
3263 PH/26 Added a "continue" ACL modifier that does nothing, for the benefit of its
3264 expansion side effects.
3266 PH/27 When a message times out after an over-quota error from an Exim-imposed
3267 quota, the bounce message says "mailbox is full". This message was not
3268 being given when it was a system quota that was exceeded. It now should
3271 MH/03 Made $recipients available in local_scan(). local_scan() already has
3272 better access to the recipient list through recipients_list[], but
3273 $recipients can be useful in postmaster-provided expansion strings.
3275 PH/28 The $smtp_command and $smtp_command_argument variables were not correct
3276 in the case of a MAIL command with additional options following the
3277 address, for example: MAIL FROM:<foo@bar> SIZE=1234. The option settings
3278 were accidentally chopped off.
3280 PH/29 SMTP synchronization checks are implemented when a command is read -
3281 there is a check that no more input is waiting when there shouldn't be
3282 any. However, for some commands, a delay in an ACL can mean that it is
3283 some time before the response is written. In this time, more input might
3284 arrive, invalidly. So now there are extra checks after an ACL has run for
3285 HELO/EHLO and after the predata ACL, and likewise for MAIL and RCPT when
3286 pipelining has not been advertised.
3288 PH/30 MH's patch to allow iscntrl() characters to be list separators.
3290 PH/31 Unlike :fail:, a custom message specified with :defer: was not being
3291 returned in the SMTP response when smtp_return_error_details was false.
3292 This has been fixed.
3294 PH/32 Change the Dovecot authenticator to use read() and write() on the socket
3295 instead of the C I/O that was originally supplied, because problems were
3296 reported on Solaris.
3298 PH/33 Compile failed with OpenSSL 0.9.8e. This was due to a coding error in
3299 Exim which did not show up earlier: it was assuming that a call to
3300 SSL_CTX_set_info_callback() might give an error value. In fact, there is
3301 no error. In previous releases of OpenSSL, SSL_CTX_set_info_callback()
3302 was a macro that became an assignment, so it seemed to work. This has
3303 changed to a proper function call with a void return, hence the compile
3304 error. Exim's code has been fixed.
3306 PH/34 Change HDA_SIZE in oracle.c from 256 to 512. This is needed for 64-bit
3309 PH/35 Applied a patch from the Sieve maintainer which fixes a bug in "notify".
3311 PH/36 Applied John Jetmore's patch to add -v functionality to exigrep.
3313 PH/37 If a message is not accepted after it has had an id assigned (e.g.
3314 because it turns out to be too big or there is a timeout) there is no
3315 "Completed" line in the log. When some messages of this type were
3316 selected by exigrep, they were listed as "not completed". Others were
3317 picked up by some special patterns. I have improved the selection
3318 criteria to be more general.
3320 PH/38 The host_find_failed option in the manualroute router can now be set
3321 to "ignore", to completely ignore a host whose IP address cannot be
3322 found. If all hosts are ignored, the behaviour is controlled by the new
3323 host_all_ignored option.
3325 PH/39 In a list of hosts for manualroute, if one item (either because of multi-
3326 homing or because of multiple MX records with /mx) generated more than
3327 one IP address, and the following item turned out to be the local host,
3328 all the secondary addresses of the first item were incorrectly removed
3329 from the list, along with the local host and any following hosts (which
3330 is what is supposed to happen).
3332 PH/40 When Exim receives a message, it writes the login name, uid, and gid of
3333 whoever called Exim into the -H file. In the case of the daemon it was
3334 behaving confusingly. When first started, it used values for whoever
3335 started the daemon, but after a SIGHUP it used the Exim user (because it
3336 calls itself on a restart). I have changed the code so that it now always
3339 PH/41 (Following a suggestion from Tony Finch) If all the RCPT commands in a
3340 message are rejected with the same error (e.g. no authentication or bad
3341 sender address), and a DATA command is nevertheless sent (as can happen
3342 with PIPELINING or a stupid MUA), the error message that was given to the
3343 RCPT commands is included in the rejection of the DATA command. This is
3344 intended to be helpful for MUAs that show only the final error to their
3347 PH/42 Another patch from the Sieve maintainer.
3349 SC/02 Eximstats - Differentiate between permanent and temporary rejects.
3350 Eximstats - Fixed some broken HTML links and added missing column headers
3352 Eximstats - Fixed Grand Total Summary Domains, Edomains, and Email
3353 columns for Rejects, Temp Rejects, Ham, and Spam rows.
3355 SC/03 Eximstats - V1.58 Fix to get <> and blackhole to show in edomain tables.
3357 PH/43 Yet another patch from the Sieve maintainer.
3359 PH/44 I found a way to check for a TCP/IP connection going away before sending
3360 the response to the final '.' that terminates a message, but only in the
3361 case where the client has not sent further data following the '.'
3362 (unfortunately, this is allowed). However, in many cases there won't be
3363 any further data because there won't be any more messages to send. A call
3364 to select() can be used: if it shows that the input is "ready", there is
3365 either input waiting, or the socket has been closed. An attempt to read
3366 the next input character can distinguish the two cases. Previously, Exim
3367 would have sent an OK response which the client would never have see.
3368 This could lead to message repetition. This fix should cure that, at
3369 least in a lot of common cases.
3371 PH/45 Do not advertise STARTTLS in response to HELP unless it would be
3372 advertised in response to EHLO.
3378 PH/01 Two more bugs that were introduced by 4.64/PH/07, in addition to the one
3379 fixed by 4.65/MH/01 (is this a record?) are fixed:
3381 (i) An empty string was always treated as zero by the numeric comparison
3382 operators. This behaviour has been restored.
3384 (ii) It is documented that the numeric comparison operators always treat
3385 their arguments as decimal numbers. This was broken in that numbers
3386 starting with 0 were being interpreted as octal.
3388 While fixing these problems I realized that there was another issue that
3389 hadn't been noticed. Values of message_size_limit (both the global option
3390 and the transport option) were treated as octal if they started with 0.
3391 The documentation was vague. These values are now always treated as
3392 decimal, and I will make that clear in the documentation.
3398 TK/01 Disable default definition of HAVE_LINUX_SENDFILE. Clashes with
3399 Linux large file support (_FILE_OFFSET_BITS=64) on older glibc
3402 MH/01 Don't check that the operands of numeric comparison operators are
3403 integers when their expansion is in "skipping" mode (fixes bug
3404 introduced by 4.64-PH/07).
3406 PH/01 If a system filter or a router generates more than SHRT_MAX (32767)
3407 child addresses, Exim now panics and dies. Previously, because the count
3408 is held in a short int, deliveries were likely to be lost. As such a
3409 large number of recipients for a single message is ridiculous
3410 (performance will be very, very poor), I have chosen to impose a limit
3411 rather than extend the field.
3417 TK/01 Bugzilla #401. Fix DK spooling code so that it can overwrite a
3418 leftover -K file (the existence of which was triggered by #402).
3419 While we were at it, introduced process PID as part of the -K
3420 filename. This should rule out race conditions when creating
3423 TK/02 Bugzilla #402. Apply patch from Simon Arlott, speeding up DK signing
3424 processing considerably. Previous code took too long for large mails,
3425 triggering a timeout which in turn triggers #401.
3427 TK/03 Introduced HAVE_LINUX_SENDFILE to os.h-Linux. Currently only used
3428 in the DK code in transports.c. sendfile() is not really portable,
3429 hence the _LINUX specificness.
3431 TF/01 In the add_headers option to the mail command in an Exim filter,
3432 there was a bug that Exim would claim a syntax error in any
3433 header after the first one which had an odd number of characters
3436 PH/01 If a server that rejects MAIL FROM:<> was the target of a sender
3437 callout verification, Exim cached a "reject" for the entire domain. This
3438 is correct for most verifications, but it is not correct for a recipient
3439 verification with use_sender or use_postmaster set, because in that case
3440 the callout does not use MAIL FROM:<>. Exim now distinguishes the special
3441 case of MAIL FROM:<> rejection from other early rejections (e.g.
3442 rejection of HELO). When verifying a recipient using a non-null MAIL
3443 address, the cache is ignored if it shows MAIL FROM:<> rejection.
3444 Whatever the result of the callout, the value of the domain cache is
3445 left unchanged (for any other kind of callout, getting as far as trying
3446 RCPT means that the domain itself is ok).
3448 PH/02 Tidied a number of unused variable and signed/unsigned warnings that
3451 PH/03 On Solaris, an unexpectedly close socket (dropped connection) can
3452 manifest itself as EPIPE rather than ECONNECT. When tidying away a
3453 session, the daemon ignores ECONNECT errors and logs others; it now
3454 ignores EPIPE as well.
3456 PH/04 Applied Nico Erfurth's refactoring patch to tidy up mime.c
3457 (quoted-printable decoding).
3459 PH/05 Applied Nico Erfurth's refactoring patch to tidy up spool_mbox.c, and
3460 later the small subsequent patch to fix an introduced bug.
3462 PH/06 Installed the latest Cygwin Makefile from the Cygwin maintainer.
3464 PH/07 There was no check for overflow in expansions such as ${if >{1}{4096M}}.
3466 PH/08 An error is now given if message_size_limit is specified negative.
3468 PH/09 Applied and tidied up Jakob Hirsch's patch for allowing ACL variables
3469 to be given (somewhat) arbitrary names.
3471 JJ/01 exipick 20060919.0, allow for arbitrary acl_ variables introduced
3474 JJ/02 exipick 20060919.0, --show-vars args can now be regular expressions,
3475 miscellaneous code fixes
3477 PH/10 Added the log_reject_target ACL modifier to specify where to log
3480 PH/11 Callouts were setting the name used for EHLO/HELO from $smtp_active_
3481 hostname. This is wrong, because it relates to the incoming message (and
3482 probably the interface on which it is arriving) and not to the outgoing
3483 callout (which could be using a different interface). This has been
3484 changed to use the value of the helo_data option from the smtp transport
3485 instead - this is what is used when a message is actually being sent. If
3486 there is no remote transport (possible with a router that sets up host
3487 addresses), $smtp_active_hostname is used.
3489 PH/12 Installed Andrey Panin's patch to add a dovecot authenticator. Various
3490 tweaks were necessary in order to get it to work (see also 21 below):
3491 (a) The code assumed that strncpy() returns a negative number on buffer
3492 overflow, which isn't the case. Replaced with Exim's string_format()
3494 (b) There were several signed/unsigned issues. I just did the minimum
3495 hacking in of casts. There is scope for a larger refactoring.
3496 (c) The code used strcasecmp() which is not a standard C function.
3497 Replaced with Exim's strcmpic() function.
3498 (d) The code set only $1; it now sets $auth1 as well.
3499 (e) A simple test gave the error "authentication client didn't specify
3500 service in request". It would seem that Dovecot has changed its
3501 interface. Fortunately there's a specification; I followed it and
3502 changed what the client sends and it appears to be working now.
3504 PH/13 Added $message_headers_raw to provide the headers without RFC 2047
3507 PH/14 Corrected misleading output from -bv when -v was also used. Suppose the
3508 address A is aliased to B and C, where B exists and C does not. Without
3509 -v the output is "A verified" because verification stops after a
3510 successful redirection if more than one address is generated. However,
3511 with -v the child addresses are also verified. Exim was outputting "A
3512 failed to verify" and then showing the successful verification for C,
3513 with its parentage. It now outputs "B failed to verify", showing B's
3514 parentage before showing the successful verification of C.
3516 PH/15 Applied Michael Deutschmann's patch to allow DNS black list processing to
3517 look up a TXT record in a specific list after matching in a combined
3520 PH/16 It seems that the options setting for the resolver (RES_DEFNAMES and
3521 RES_DNSRCH) can affect the behaviour of gethostbyname() and friends when
3522 they consult the DNS. I had assumed they would set it the way they
3523 wanted; and indeed my experiments on Linux seem to show that in some
3524 cases they do (I could influence IPv6 lookups but not IPv4 lookups).
3525 To be on the safe side, however, I have now made the interface to
3526 host_find_byname() similar to host_find_bydns(), with an argument
3527 containing the DNS resolver options. The host_find_byname() function now
3528 sets these options at its start, just as host_find_bydns() does. The smtp
3529 transport options dns_qualify_single and dns_search_parents are passed to
3530 host_find_byname() when gethostbyname=TRUE in this transport. Other uses
3531 of host_find_byname() use the default settings of RES_DEFNAMES
3532 (qualify_single) but not RES_DNSRCH (search_parents).
3534 PH/17 Applied (a modified version of) Nico Erfurth's patch to make
3535 spool_read_header() do less string testing, by means of a preliminary
3536 switch on the second character of optional "-foo" lines. (This is
3537 overdue, caused by the large number of possibilities that now exist.
3538 Originally there were few.) While I was there, I also converted the
3539 str(n)cmp tests so they don't re-test the leading "-" and the first
3540 character, in the hope this might squeeze out yet more improvement.
3542 PH/18 Two problems with "group" syntax in header lines when verifying: (1) The
3543 flag allowing group syntax was set by the header_syntax check but not
3544 turned off, possible causing trouble later; (2) The flag was not being
3545 set at all for the header_verify test, causing "group"-style headers to
3546 be rejected. I have now set it in this case, and also caused header_
3547 verify to ignore an empty address taken from a group. While doing this, I
3548 came across some other cases where the code for allowing group syntax
3549 while scanning a header line wasn't quite right (mostly, not resetting
3550 the flag correctly in the right place). These bugs could have caused
3551 trouble for malformed header lines. I hope it is now all correct.
3553 PH/19 The functions {pwcheck,saslauthd}_verify_password() are always called
3554 with the "reply" argument non-NULL. The code, however (which originally
3555 came from elsewhere) had *some* tests for NULL when it wrote to *reply,
3556 but it didn't always do it. This confused somebody who was copying the
3557 code for some other use. I have removed all the tests.
3559 PH/20 It was discovered that the GnuTLS code had support for RSA_EXPORT, a
3560 feature that was used to support insecure browsers during the U.S. crypto
3561 embargo. It requires special client support, and Exim is probably the
3562 only MTA that supported it -- and would never use it because real RSA is
3563 always available. This code has been removed, because it had the bad
3564 effect of slowing Exim down by computing (never used) parameters for the
3565 RSA_EXPORT functionality.
3567 PH/21 On the advice of Timo Sirainen, added a check to the dovecot
3568 authenticator to fail if there's a tab character in the incoming data
3569 (there should never be unless someone is messing about, as it's supposed
3570 to be base64-encoded). Also added, on Timo's advice, the "secured" option
3571 if the connection is using TLS or if the remote IP is the same as the
3572 local IP, and the "valid-client-cert option" if a client certificate has
3575 PH/22 As suggested by Dennis Davis, added a server_condition option to *all*
3576 authenticators. This can be used for authorization after authentication
3577 succeeds. (In the case of plaintext, it servers for both authentication
3580 PH/23 Testing for tls_required and lost_connection in a retry rule didn't work
3581 if any retry times were supplied.
3583 PH/24 Exim crashed if verify=helo was activated during an incoming -bs
3584 connection, where there is no client IP address to check. In this
3585 situation, the verify now always succeeds.
3587 PH/25 Applied John Jetmore's -Mset patch.
3589 PH/26 Added -bem to be like -Mset, but loading a message from a file.
3591 PH/27 In a string expansion for a processed (not raw) header when multiple
3592 headers of the same name were present, leading whitespace was being
3593 removed from all of them, but trailing whitespace was being removed only
3594 from the last one. Now trailing whitespace is removed from each header
3595 before concatenation. Completely empty headers in a concatenation (as
3596 before) are ignored.
3598 PH/28 Fixed bug in backwards-compatibility feature of PH/09 (thanks to John
3599 Jetmore). It would have mis-read ACL variables from pre-4.61 spool files.
3601 PH/29 [Removed. This was a change that I later backed out, and forgot to
3602 correct the ChangeLog entry (that I had efficiently created) before
3603 committing the later change.]
3605 PH/30 Exim was sometimes attempting to deliver messages that had suffered
3606 address errors (4xx response to RCPT) over the same connection as other
3607 messages routed to the same hosts. Such deliveries are always "forced",
3608 so retry times are not inspected. This resulted in far too many retries
3609 for the affected addresses. The effect occurred only when there were more
3610 hosts than the hosts_max_try setting in the smtp transport when it had
3611 the 4xx errors. Those hosts that it had tried were not added to the list
3612 of hosts for which the message was waiting, so if all were tried, there
3613 was no problem. Two fixes have been applied:
3615 (i) If there are any address or message errors in an SMTP delivery, none
3616 of the hosts (tried or untried) are now added to the list of hosts
3617 for which the message is waiting, so the message should not be a
3618 candidate for sending over the same connection that was used for a
3619 successful delivery of some other message. This seems entirely
3620 reasonable: after all the message is NOT "waiting for some host".
3621 This is so "obvious" that I'm not sure why it wasn't done
3622 previously. Hope I haven't missed anything, but it can't do any
3623 harm, as the worst effect is to miss an optimization.
3625 (ii) If, despite (i), such a delivery is accidentally attempted, the
3626 routing retry time is respected, so at least it doesn't keep
3627 hammering the server.
3629 PH/31 Installed Andrew Findlay's patch to close the writing end of the socket
3630 in ${readsocket because some servers need this prod.
3632 PH/32 Added some extra debug output when updating a wait-xxx database.
3634 PH/33 The hint "could be header name not terminated by colon", which has been
3635 given for certain expansion errors for a long time, was not being given
3636 for the ${if def:h_colon_omitted{... case.
3638 PH/34 The spec says: "With one important exception, whenever a domain list is
3639 being scanned, $domain contains the subject domain." There was at least
3640 one case where this was not true.
3642 PH/35 The error "getsockname() failed: connection reset by peer" was being
3643 written to the panic log as well as the main log, but it isn't really
3644 panic-worthy as it just means the connection died rather early on. I have
3645 removed the panic log writing for the ECONNRESET error when getsockname()
3648 PH/36 After a 4xx response to a RCPT error, that address was delayed (in queue
3649 runs only) independently of the message's sender address. This meant
3650 that, if the 4xx error was in fact related to the sender, a different
3651 message to the same recipient with a different sender could confuse
3652 things. In particular, this can happen when sending to a greylisting
3653 server, but other circumstances could also provoke similar problems.
3654 I have changed the default so that the retry time for these errors is now
3655 based a combination of the sender and recipient addresses. This change
3656 can be overridden by setting address_retry_include_sender=false in the
3659 PH/37 For LMTP over TCP/IP (the smtp transport), error responses from the
3660 remote server are returned as part of bounce messages. This was not
3661 happening for LMTP over a pipe (the lmtp transport), but now it is the
3662 same for both kinds of LMTP.
3664 PH/38 Despite being documented as not happening, Exim was rewriting addresses
3665 in header lines that were in fact CNAMEs. This is no longer the case.
3667 PH/39 If -R or -S was given with -q<time>, the effect of -R or -S was ignored,
3668 and queue runs started by the daemon processed all messages. This has
3669 been fixed so that -R and -S can now usefully be given with -q<time>.
3671 PH/40 Import PCRE release 6.7 (fixes some bugs).
3673 PH/41 Add bitwise logical operations to eval (courtesy Brad Jorsch).
3675 PH/42 Give an error if -q is specified more than once.
3677 PH/43 Renamed the variables $interface_address and $interface_port as
3678 $received_ip_address and $received_port, to make it clear that these
3679 values apply to message reception, and not to the outgoing interface when
3680 a message is delivered. (The old names remain recognized, of course.)
3682 PH/44 There was no timeout on the connect() call when using a Unix domain
3683 socket in the ${readsocket expansion. There now is.
3685 PH/45 Applied a modified version of Brad Jorsch's patch to allow "message" to
3686 be meaningful with "accept".
3688 SC/01 Eximstats V1.43
3689 Bug fix for V1.42 with -h0 specified. Spotted by Chris Lear.
3691 SC/02 Eximstats V1.44
3692 Use a glob alias rather than an array ref in the generated
3693 parser. This improves both readability and performance.
3695 SC/03 Eximstats V1.45 (Marco Gaiarin / Steve Campbell)
3696 Collect SpamAssassin and rejection statistics.
3697 Don't display local sender or destination tables unless
3698 there is data to show.
3699 Added average volumes into the top table text output.
3701 SC/04 Eximstats V1.46
3702 Collect data on the number of addresses (recipients)
3703 as well as the number of messages.
3705 SC/05 Eximstats V1.47
3706 Added 'Message too big' to the list of mail rejection
3707 reasons (thanks to Marco Gaiarin).
3709 SC/06 Eximstats V1.48
3710 Mainlog lines which have GMT offsets and are too short to
3711 have a flag are now skipped.
3713 SC/07 Eximstats V1.49 (Alain Williams)
3714 Added the -emptyok flag.
3716 SC/08 Eximstats V1.50
3717 Fixes for obtaining the IP address from reject messages.
3719 JJ/03 exipick.20061117.2, made header handling as similar to exim as possible
3720 (added [br]h_ prefixes, implemented RFC2047 decoding. Fixed
3721 whitespace changes from 4.64-PH/27
3723 JJ/04 exipick.20061117.2, fixed format and added $message_headers_raw to
3726 JJ/05 exipick.20061117.2, bug fixes (error out sooner when invalid criteria
3727 are found, allow negative numbers in numeric criteria)
3729 JJ/06 exipick.20061117.2, added new $message_body_missing variable
3731 JJ/07 exipick.20061117.2, added $received_ip_address and $received_port
3732 to match changes made in 4.64-PH/43
3734 PH/46 Applied Jori Hamalainen's patch to add features to exiqsumm.
3736 PH/47 Put in an explicit test for a DNS lookup of an address record where the
3737 "domain" is actually an IP address, and force a failure. This locks out
3738 those revolvers/nameservers that support "A-for-A" lookups, in
3739 contravention of the specifications.
3741 PH/48 When a host name was looked up from an IP address, and the subsequent
3742 forward lookup of the name timed out, the host name was left in
3743 $sender_host_name, contrary to the specification.
3745 PH/49 Although default lookup types such as lsearch* or cdb*@ have always been
3746 restricted to single-key lookups, Exim was not diagnosing an error if
3747 * or *@ was used with a query-style lookup.
3749 PH/50 Increased the value of DH_BITS in tls-gnu.c from 768 to 1024.
3751 MH/01 local_scan ABI version incremented to 1.1. It should have been updated
3752 long ago, but noone interested enough thought of it. Let's just say that
3753 the "1.1" means that there are some new functions that weren't there at
3754 some point in the past.
3756 PH/51 Error processing for expansion failure of helo_data from an smtp
3757 transport during callout processing was broken.
3759 PH/52 Applied John Jetmore's patch to allow tls-on-connect and STARTTLS to be
3760 tested/used via the -bh/-bhc/-bs options.
3762 PH/53 Added missing "#include <time.h>" to pcre/pcretest.c (this was a PCRE
3763 bug, fixed in subsequent PCRE releases).
3765 PH/54 Applied Robert Bannocks' patch to avoid a problem with references that
3766 arises when using the Solaris LDAP libraries (but not with OpenLDAP).
3768 PH/55 Check for a ridiculously long file name in exim_dbmbuild.
3774 SC/01 Use a glob alias rather than an array ref in eximstats generated
3775 parser. This improves both readability and performance.
3777 SC/02 Collect SpamAssassin and rejection statistics in eximstats.
3778 Don't display local sender or destination tables in eximstats unless
3779 there is data to show.
3780 Added average volumes into the eximstats top table text output.
3782 SC/03 Collect data on the number of addresses (recipients) as well
3783 as the number of messages in eximstats.
3785 TF/01 Correct an error in the documentation for the redirect router. Exim
3786 does (usually) call initgroups() when daemonizing.
3788 TF/02 Call initgroups() when dropping privilege in exim.c, so that Exim runs
3789 with consistent privilege compared to when running as a daemon.
3791 TF/03 Note in the spec that $authenticated_id is not set for local
3792 submissions from trusted users.
3794 TF/04 The ratelimit per_rcpt option now works correctly in acl_not_smtp.
3795 Thanks to Dean Brooks <dean@iglou.com> for the patch.
3797 TF/05 Make it easier to get SMTP authentication and TLS/SSL support working
3798 by adding some example configuration directives to the default
3799 configuration file. A little bit of work is required to uncomment the
3800 directives and define how usernames and passwords are checked, but
3801 there is now a framework to start from.
3803 PH/01 Added #define LDAP_DEPRECATED 1 to ldap.c because some of the "old"
3804 functions that Exim currently uses aren't defined in ldap.h for OpenLDAP
3805 without this. I don't know how relevant this is to other LDAP libraries.
3807 PH/02 Add the verb name to the "unknown ACL verb" error.
3809 PH/03 Magnus Holmgren's patch for filter_prepend_home.
3811 PH/03 Fixed Bugzilla #101: macro definition between ACLs doesn't work.
3813 PH/04 Applied Magnus Holmgren's patch to fix Bugzilla #98: transport's home
3814 directory not expanded when it should be if an expanded home directory
3815 was set for the address (which is overridden by the transport).
3817 PH/05 Applied Alex Kiernan's patch to fix Bugzilla #99: a problem with
3820 PH/06 Added acl_not_smtp_start, based on Johannes Berg's patch, and set the
3821 bit to forbid control=suppress_local_fixups in the acl_not_smtp ACL,
3822 because it is too late at that time, and has no effect.
3824 PH/07 Changed ${quote_pgsql to quote ' as '' instead of \' because of a
3825 security issue with \' (bugzilla #107). I could not use the
3826 PQescapeStringConn() function, because it needs a PGconn value as one of
3829 PH/08 When testing addresses using -bt, indicate those final addresses that
3830 are duplicates that would not cause an additional delivery. At least one
3831 person was confused, thinking that -bt output corresponded to deliveries.
3832 (Suppressing duplicates isn't a good idea as you lose the information
3833 about possibly different redirections that led to the duplicates.)
3835 PH/09 Applied patch from Erik to use select() instead of poll() in spam.c on
3836 systems where poll() doesn't work, in particular OS X.
3838 PH/10 Added more information to debugging output for retry time not reached.
3840 PH/11 Applied patch from Arkadiusz Miskiewicz to apply a timeout to read
3841 operations in malware.c.
3843 PH/12 Applied patch from Magnus Holmgren to include the "h" tag in Domain Keys
3846 PH/13 If write_rejectlog was set false when logging was sent to syslog with
3847 syslog_duplication set false, log lines that would normally be written
3848 both the the main log and to the reject log were not written to syslog at
3851 PH/14 In the default configuration, change the use of "message" in ACL warn
3852 statements to "add_header".
3854 PH/15 Diagnose a filter syntax error for "seen", "unseen", or "noerror" if not
3855 not followed by a command (e.g. "seen endif").
3857 PH/16 Recognize SMTP codes at the start of "message" in ACLs and after :fail:
3858 and :defer: in a redirect router. Add forbid_smtp_code to suppress the
3861 PH/17 Added extra conditions to the default value of delay_warning_condition
3865 { !eq{$h_list-id:$h_list-post:$h_list-subscribe:}{} } \
3866 { match{$h_precedence:}{(?i)bulk|list|junk} } \
3867 { match{$h_auto-submitted:}{(?i)auto-generated|auto-replied} } \
3870 The Auto-Submitted: and various List- headers are standardised, whereas I
3871 don't think Precedence: ever was.
3873 PH/18 Refactored debugging code in route_finduser() to show more information,
3874 in particular, the error code if getpwnam() issues one.
3876 PH/19 Added PQsetClientEncoding(conn, "SQL_ASCII") to the pgsql code module.
3877 This is apparently needed in addition to the PH/07 change above to avoid
3878 any possible encoding problems.
3880 PH/20 Perl can change the locale. Exim was resetting it after a ${perl call,
3881 but not after initializing Perl.
3883 PH/21 Added a call to PQsetNoticeProcessor() to catch pgsql "notices" and
3884 output them only if debugging. By default they are written stderr,
3885 apparently, which is not desirable.
3887 PH/22 Added Alain Williams' LDAP patch to support setting REFERRALS=off on
3890 JJ/01 exipick: added --reverse (and -R synonym), --random, --size, --sort and
3893 JJ/02 exipick: rewrote --help documentation to hopefully make more clear.
3895 PH/23 Made -oMaa and -oMt work with -bh and -bs to pretend the connection is
3896 authenticated or an ident call has been made. Suppress the default
3897 values for $authenticated_id and $authenticated_sender (but permit -oMai
3898 and -oMas) when testing with -bh.
3900 PH/24 Re-jigged the order of the tests in the default configuration so that the
3901 tests for valid domains and recipients precede the DNS black list and CSA
3902 tests, on the grounds that those ones are more expensive.
3904 PH/25 Exim was not testing for a space following SMTP commands such as EHLO
3905 that require one. Thus, EHLORHUBARB was interpreted as a valid command.
3906 This bug exists in every version of Exim that I still have, right back to
3909 PH/26 (n)wildlsearch lookups are documented as being done case-insensitively.
3910 However, an attempt to turn on case-sensitivity in a regex key by
3911 including (?-i) didn't work because the subject string was already
3912 lowercased, and the effects were non-intuitive. It turns out that a
3913 one-line patch can be used to allow (?-i) to work as expected.
3919 TF/01 Fix the add_header change below (4.61 PH/55) which had a bug that (amongst
3920 other effects) broke the use of negated acl sub-conditions.
3922 PH/01 ${readsocket now supports Internet domain sockets (modified John Jetmore
3925 PH/02 When tcp-wrappers is called from Exim, it returns only "deny" or "allow".
3926 "Deny" causes Exim to reject the incoming connection with a 554 error.
3927 Unfortunately, if there is a major crisis, such as a disk failure,
3928 tcp-wrappers gives "deny", whereas what one would like would be some
3929 kind of temporary error. A kludge has been added to help with this.
3930 Before calling hosts_ctl(), errno is set zero. If the result is "deny", a
3931 554 error is used if errno is still zero or contains ENOENT (which occurs
3932 if either of the /etc/hosts.{allow,deny} files is missing). Otherwise, a
3935 PH/03 Add -lutil to the default FreeBSD LIBS setting.
3937 PH/04 Change PH/19 for 4.61 was too wide. It should not be applied to host
3938 errors. Otherwise a message that provokes a temporary error (when other
3939 messages do not) can cause a whole host to time out.
3941 PH/05 Batch deliveries by appendfile and pipe transports did not work when the
3942 addresses were routed directly to files or pipes from a redirect router.
3943 File deliveries just didn't batch; pipe deliveries might have suffered
3946 PH/06 A failure to get a lock for a hints database would erroneously always say
3947 "Failed to get write lock", even when it was really a read lock.
3949 PH/07 The appendfile transport was creating MBX lock files with a fixed mode
3950 of 0600. This has been changed to use the value of the lockfile_mode
3951 option (which defaults to 0600).
3953 PH/08 Applied small patch from the Sieve maintainer.
3955 PH/09 If maildir_quota_directory_regex was set to exclude (say) the .Trash
3956 folder from quota calculations, a direct delivery into this folder messed
3957 up the contents of the maildirsize file. This was because the regex was
3958 used only to exclude .Trash (or whatever) when the size of the mailbox
3959 was calculated. There was no check that a delivery was happening into an
3960 excluded directory. This bug has been fixed by ignoring all quota
3961 processing for deliveries into excluded directories.
3963 PH/10 Added the maildirfolder_create_regex option to appendfile.
3969 PH/01 The code for finding all the local interface addresses on a FreeBSD
3970 system running IPv6 was broken. This may well have applied to all BSD
3971 systems, as well as to others that have similar system calls. The broken
3972 code found IPv4 interfaces correctly, but gave incorrect values for the
3973 IPv6 interfaces. In particular, ::1 was not found. The effect in Exim was
3974 that it would not match correctly against @[] and not recognize the IPv6
3977 PH/02 The ipliteral router was not recognizing addresses of the form user@
3978 [ipv6:....] because it didn't know about the "ipv6:" prefix.
3980 PH/03 Added disable_ipv6.
3982 PH/04 Changed $reply_address to use the raw form of the headers instead of the
3983 decoded form, because it is most often used to construct To: headers
3984 lines in autoreplies, and the decoded form may well be syntactically
3985 invalid. However, $reply_address has leading white space removed, and all
3986 newlines turned into spaces so that the autoreply transport does not
3989 PH/05 If group was specified without a user on a router, and no group or user
3990 was specified on a transport, the group from the router was ignored.
3992 PH/06 Increased the number of ACL variables to 20 of each type, and arranged
3993 for visible compile-time settings that can be used to change these
3994 numbers, for those that want even more. Backwards compatibility with old
3995 spool files has been maintained. However, going back to a previous Exim
3996 release will lost any variables that are in spool files.
3998 PH/07 Two small changes when running in the test harness: increase delay when
3999 passing a TCP/IP connection to a new process, in case the original
4000 process has to generate a bounce, and remove special handling of
4001 127.0.0.2 (sic), which is no longer necessary.
4003 PH/08 Changed debug output of dbfn_open() flags from numbers to names, so as to
4004 be the same on different OS.
4006 PH/09 Moved a debug statement in filter processing to avoid a race problem when
4009 JJ/01 exipick: fixed bug where -b (brief) output option showed "Vars:"
4010 whether --show-vars was specified or not
4012 JJ/02 exipick: Added support for new ACL variable spool format introduced
4015 PH/10 Fixed another bug related to PH/04 above: if an incoming message had a
4016 syntactically invalid From: or Reply-to: line, and a filter used this to
4017 generate an autoreply, and therefore failed to obtain an address for the
4018 autoreply, Exim could try to deliver to a non-existent relative file
4019 name, causing unrelated and misleading errors. What now happens is that
4020 it logs this as a hard delivery error, but does not attempt to create a
4023 PH/11 The exinext utility has a -C option for testing purposes, but although
4024 the given file was scanned by exinext itself; it wasn't being passed on
4025 when Exim was called.
4027 PH/12 In the smtp transport, treat an explicit ECONNRESET error the same as
4028 an end-of-file indication when reading a command response.
4030 PH/13 Domain literals for IPv6 were not recognized unless IPv6 support was
4031 compiled. In many other places in Exim, IPv6 addresses are always
4032 recognized, so I have changed this. It also means that IPv4 domain
4033 literals of the form [IPV4:n.n.n.n] are now always recognized.
4035 PH/14 When a uid/gid is specified for the queryprogram router, it cannot be
4036 used if the router is not running as root, for example, when verifying at
4037 ACL time, or when using -bh. The debugging output from this situation was
4038 non-existent - all you got was a failure to exec. I have made two
4041 (a) Failures to set uid/gid, the current directory, or a process leader
4042 in a subprocess such as that created by queryprogram now generate
4043 suitable debugging output when -d is set.
4045 (b) The queryprogram router detects when it is not running as root,
4046 outputs suitable debugging information if -d is set, and then runs
4047 the subprocess without attempting to change uid/gid.
4049 PH/15 Minor change to Makefile for building test_host (undocumented testing
4052 PH/16 As discussed on the list in Nov/Dec: Exim no longer looks at the
4053 additional section of a DNS packet that returns MX or SRV records.
4054 Instead, it always explicitly searches for A/AAAA records. This avoids
4055 major problems that occur when a DNS server includes only records of one
4056 type (A or AAAA) in an MX/SRV packet. A byproduct of this change has
4057 fixed another bug: if SRV records were looked up and the corresponding
4058 address records were *not* found in the additional section, the port
4059 values from the SRV records were lost.
4061 PH/17 If a delivery to a pipe, file, or autoreply was deferred, Exim was not
4062 using the correct key (the original address) when searching the retry
4063 rules in order to find which one to use for generating the retry hint.
4065 PH/18 If quota_warn_message contains a From: header, Exim now refrains from
4066 adding the default one. Similarly, if it contains a Reply-To: header, the
4067 errors_reply_to option, if set, is not used.
4069 PH/19 When calculating a retry time, Exim used to measure the "time since
4070 failure" by looking at the "first failed" field in the retry record. Now
4071 it does not use this if it is later than than the arrival time of the
4072 message. Instead it uses the arrival time. This makes for better
4073 behaviour in cases where some deliveries succeed, thus re-setting the
4074 "first failed" field. An example is a quota failure for a huge message
4075 when small messages continue to be delivered. Without this change, the
4076 "time since failure" will always be short, possible causing more frequent
4077 delivery attempts for the huge message than are intended.
4078 [Note: This change was subsequently modified - see PH/04 for 4.62.]
4080 PH/20 Added $auth1, $auth2, $auth3 to contain authentication data (as well as
4081 $1, $2, $3) because the numerical variables can be reset during some
4082 expansion items (e.g. "match"), thereby losing the authentication data.
4084 PH/21 Make -bV show the size of off_t variables so that the test suite can
4085 decide whether to run tests for quotas > 2G.
4087 PH/22 Test the values given for quota, quota_filecount, quota_warn_threshold,
4088 mailbox_size, and mailbox_filecount in the appendfile transport. If a
4089 filecount value is greater than 2G or if a quota value is greater than 2G
4090 on a system where the size of off_t is not greater than 4, a panic error
4093 PH/23 When a malformed item such as 1.2.3/24 appears in a host list, it can
4094 never match. The debug and -bh output now contains an explicit error
4095 message indicating a malformed IPv4 address or mask.
4097 PH/24 An host item such as 1.2.3.4/abc was being treated as the IP address
4098 1.2.3.4 without a mask. Now it is not recognized as an IP address, and
4099 PH/23 above applies.
4101 PH/25 Do not write to syslog when running in the test harness. The only
4102 occasion when this arises is a failure to open the main or panic logs
4103 (for which there is an explicit test).
4105 PH/26 Added the /no_tell option to "control=freeze".
4107 PH/27 If a host name lookup failed very early in a connection, for example, if
4108 the IP address matched host_lookup and the reverse lookup yielded a name
4109 that did not have a forward lookup, an error message of the form "no IP
4110 address found for host xxx.xxx.xxx (during SMTP connection from NULL)"
4111 could be logged. Now it outputs the IP address instead of "NULL".
4113 PH/28 An enabling patch from MH: add new function child_open_exim2() which
4114 allows the sender and the authenticated sender to be set when
4115 submitting a message from within Exim. Since child_open_exim() is
4116 documented for local_scan(), the new function should be too.
4118 PH/29 In GnuTLS, a forced expansion failure for tls_privatekey was not being
4119 ignored. In both GnuTLS and OpenSSL, an expansion of tls_privatekey that
4120 results in an empty string is now treated as unset.
4122 PH/30 Fix eximon buffer overflow bug (Bugzilla #73).
4124 PH/31 Added sender_verify_fail logging option.
4126 PH/32 In November 2003, the code in Exim that added an empty Bcc: header when
4127 needed by RFC 822 but not by RFC 2822 was commented out. I have now
4128 tidied the source and removed it altogether.
4130 PH/33 When a queue run was abandoned because the load average was too high, a
4131 log line was always written; now it is written only if the queue_run log
4132 selector is set. In addition, the log line for abandonment now contains
4133 information about the queue run such as the pid. This is always present
4134 in "start" and "stop" lines but was omitted from the "abandon" line.
4136 PH/34 Omit spaces between a header name and the colon in the error message that
4137 is given when verify = headers_syntax fails (if there are lots of them,
4138 the message gets confusing).
4140 PH/35 Change the default for dns_check_names_pattern to allow slashes within
4141 names, as there are now some PTR records that contain slashes. This check
4142 is only to protect against broken name servers that fall over on strange
4143 characters, so the fact that it applies to all lookups doesn't matter.
4145 PH/36 Now that the new test suite is complete, we can remove some of the
4146 special code in Exim that was needed for the old test suite. For example,
4147 sorting DNS records because real resolvers return them in an arbitrary
4148 order. The new test suite's fake resolver always returns records in the
4151 PH/37 When running in the test harness, use -odi for submitted messages (e.g.
4152 bounces) except when queue_only is set, to avoid logging races between
4153 the different processes.
4155 PH/38 Panic-die if .include specifies a non-absolute path.
4157 PH/39 A tweak to the "H" retry rule from its user.
4159 JJ/03 exipick: Removed parentheses from 'next' and 'last' calls that specified
4160 a label. They prevented compilation on older perls.
4162 JJ/04 exipick: Refactored code to prevent implicit split to @_ which caused
4163 a warning to be raised on newish perls.
4165 JJ/05 exipick: Fixed bug where -bpc always showed a count of all messages
4166 on queue. Changes to match documented behaviour of showing count of
4167 messages matching specified criteria.
4169 PH/40 Changed the default ident timeout from 30s to 5s.
4171 PH/41 Added support for the use of login_cap features, on those BSD systems
4172 that have them, for controlling the resources used by pipe deliveries.
4174 PH/42 The content-scanning code uses fopen() to create files in which to put
4175 message data. Previously it was not paying any attention to the mode of
4176 the files. Exim runs with umask(0) because the rest of the code creates
4177 files with open(), and sets the required mode explicitly. Thus, these
4178 files were ending up world-writeable. This was not a big issue, because,
4179 being within the spool directory, they were not world-accessible. I have
4180 created a function called modefopen, which takes an additional mode
4181 argument. It sets umask(777), creates the file, chmods it to the required
4182 mode, then resets the umask. All the relevant calls to fopen() in the
4183 content scanning code have been changed to use this function.
4185 PH/43 If retry_interval_max is set greater than 24 hours, it is quietly reset
4186 to 24 hours. This avoids potential overflow problems when processing G
4187 and H retry rules. I suspect nobody ever tinkers with this value.
4189 PH/44 Added STRIP_COMMAND=/usr/bin/strip to the FreeBSD Makefile.
4191 PH/45 When the plaintext authenticator is running as a client, the server's
4192 challenges are checked to ensure they are valid base64 strings. By
4193 default, the authentication attempt is cancelled if an invalid string is
4194 received. Setting client_ignore_invalid_base64 true ignores these errors.
4195 The decoded challenge strings are now placed in $auth1, $auth2, etc. as
4196 they are received. Thus, the responses can be made to depend on the
4197 challenges. If an invalid string is ignored, an empty string is placed in
4200 PH/46 Messages that are created by the autoreply transport now contains a
4201 References: header, in accordance with RFCs 2822 and 3834.
4203 PH/47 Added authenticated_sender_force to the smtp transport.
4205 PH/48 The ${prvs expansion was broken on systems where time_t was long long.
4207 PH/49 Installed latest patch from the Sieve maintainer.
4209 PH/50 When an Exim quota was set without a file count quota, and mailbox_size
4210 was also set, the appendfile transport was unnecessarily scanning a
4211 directory of message files (e.g. for maildir delivery) to find the count
4212 of files (along with the size), even though it did not need this
4213 information. It now does the scan only if it needs to find either the
4214 size of the count of files.
4216 PH/51 Added ${time_eval: to convert Exim time strings into seconds.
4218 PH/52 Two bugs concerned with error handling when the smtp transport is
4221 (i) Exim was not creating retry information for temporary errors given
4222 for individual recipients after the DATA command when the smtp transport
4223 was used in LMTP mode. This meant that they could be retried too
4224 frequently, and not timed out correctly.
4226 (ii) Exim was setting the flag that allows error details to be returned
4227 for LMTP errors on RCPT commands, but not for LMTP errors for individual
4228 recipients that were returned after the DATA command.
4230 PH/53 This is related to PH/52, but is more general: for any failing address,
4231 when detailed error information was permitted to be returned to the
4232 sender, but the error was temporary, then after the final timeout, only
4233 "retry timeout exceeded" was returned. Now it returns the full error as
4234 well as "retry timeout exceeded".
4236 PH/54 Added control=allow_auth_unadvertised, as it seems there are clients that
4237 do this, and (what is worse) MTAs that accept it.
4239 PH/55 Added the add_header modified to ACLs. The use of "message" with "warn"
4240 will now be deprecated.
4242 PH/56 New os.c-cygwin from the Cygwin maintainer.
4244 JJ/06 exipick: added --unsorted option to allow unsorted output in all output
4245 formats (previously only available in exim formats via -bpr, -bpru,
4246 and -bpra. Now also available in native and exiqgrep formats)
4248 JJ/07 exipick: added --freeze and --thaw options to allow faster interaction
4249 with very large, slow to parse queues
4251 JJ/08 exipick: added ! as generic prefix to negate any criteria format
4253 JJ/09 exipick: miscellaneous performance enhancements (~24% improvements)
4255 PH/57 Tidies in SMTP dialogue display in debug output: (i) It was not showing
4256 responses to authentication challenges, though it was showing the
4257 challenges; (ii) I've removed the CR characters from the debug output for
4260 PH/58 Allow for the insertion of a newline as well as a space when a string
4261 is turned into more than one encoded-word during RFC 2047 encoding. The
4262 Sieve code now uses this.
4264 PH/59 Added the following errors that can be detected in retry rules: mail_4xx,
4265 data_4xx, lost_connection, tls_required.
4267 PH/60 When a VRFY deferred or FAILED, the log message rather than the user
4268 message was being sent as an SMTP response.
4270 PH/61 Add -l and -k options to exicyclog.
4272 PH/62 When verifying, if an address was redirected to one new address, so that
4273 verification continued, and the new address failed or deferred after
4274 having set something in $address_data, the value of $address_data was not
4275 passed back to the ACL. This was different to the case when no
4276 redirection occurred. The value is now passed back in both cases.
4278 PH/63 Changed the macro HAVE_LOGIN_CAP (see PH/41 for this release above) to
4279 HAVE_SETCLASSRESOURCES because there are different APIs in use that all
4280 use login_cap.h, so on its own it isn't the distinguishing feature. The
4281 new name refers directly to the setclassresources() function.
4283 PH/65 Added configuration files for NetBSD3.
4285 PH/66 Updated OS/Makefile-HP-UX for gcc 4.1.0 with HP-UX 11.
4287 PH/67 Fixed minor infelicity in the sorting of addresses to ensure that IPv6
4288 is preferred over IPv4.
4290 PH/68 The bounce_return_message and bounce_return_body options were not being
4291 honoured for bounces generated during the reception of non-SMTP messages.
4292 In particular, this applied to messages rejected by the ACL. This bug has
4293 been fixed. However, if bounce_return_message is true and bounce_return_
4294 body is false, the headers that are returned for a non-SMTP message
4295 include only those that have been read before the error was detected.
4296 (In the case of an ACL rejection, they have all been read.)
4298 PH/69 The HTML version of the specification is now built in a directory called
4299 spec_html instead of spec.html, because the latter looks like a path with
4300 a MIME-type, and this confuses some software.
4302 PH/70 Catch two compiler warnings in sieve.c.
4304 PH/71 Fixed an obscure and subtle bug (thanks Alexander & Matthias). The
4305 function verify_get_ident() calls ip_connect() to connect a socket, but
4306 if the "connect()" function timed out, ip_connect() used to close the
4307 socket. However, verify_get_ident() also closes the socket later, and in
4308 between Exim writes to the log, which may get opened at this point. When
4309 the socket was closed in ip_connect(), the log could get the same file
4310 descriptor number as the socket. This naturally causes chaos. The fix is
4311 not to close the socket in ip_connect(); the socket should be closed by
4312 the function that creates it. There was only one place in the code where
4313 this was missing, in the iplookup router, which I don't think anybody now
4314 uses, but I've fixed it anyway.
4316 PH/72 Make dns_again_means_nonexist apply to lookups using gethostbyname() as
4317 well as to direct DNS lookups. Otherwise the handling of names in host
4318 lists is inconsistent and therefore confusing.
4324 PH/01 Two changes to the default runtime configuration:
4326 (1) Move the checks for relay_from_hosts and authenticated clients from
4327 after to before the (commented out) DNS black list checks.
4329 (2) Add control=submission to the relay_from_hosts and authenticated
4330 clients checks, on the grounds that messages accepted by these
4331 statements are most likely to be submissions.
4333 PH/02 Several tidies to the handling of ${prvs and ${prvscheck:
4335 (1) Generate an error if the third argument for the ${prvs expansion is
4338 (2) Treat a missing third argument of ${prvscheck as if it were an empty
4341 (3) Reset the variables that are obtained from the first argument of
4342 ${prvscheck and used in the second argument before leaving the code,
4343 because their memory is reclaimed, so using them afterwards may do
4346 (4) Tidy up the code for expanding the arguments of ${prvscheck one by
4347 one (it's much easier than Tom thought :-).
4349 (5) Because of (4), we can now allow for the use of $prvscheck_result
4350 inside the third argument.
4352 PH/03 For some reason, the default setting of PATH when running a command from
4353 a pipe transport was just "/usr/bin". I have changed it to
4356 PH/04 SUPPORT_TRANSLATE_IP_ADDRESS and MOVE_FROZEN_MESSAGES did not cause
4357 anything to be listed in the output from -bV.
4359 PH/05 When a filter generated an autoreply, the entire To: header line was
4360 quoted in the delivery log line, like this:
4362 => >A.N.Other <ano@some.domain> <original@ddress> ...
4364 This has been changed so that it extracts the operative address. There
4365 may be more than one such address. If so, they are comma-separated, like
4368 => >ano@some.domain,ona@other.domain <original@ddress> ...
4370 PH/06 When a client host used a correct literal IP address in a HELO or EHLO
4371 command, (for example, EHLO [1.2.3.4]) and the client's IP address was
4372 not being looked up in the rDNS to get a host name, Exim was showing the
4373 IP address twice in Received: lines, even though the IP addresses were
4374 identical. For example:
4376 Received: from [1.2.3.4] (helo=[1.2.3.4])
4378 However, if the real host name was known, it was omitting the HELO data
4379 if it matched the actual IP address. This has been tidied up so that it
4380 doesn't show the same IP address twice.
4382 PH/07 When both +timestamp and +memory debugging was on, the value given by
4383 $tod_xxx expansions could be wrong, because the tod_stamp() function was
4384 called by the debug printing, thereby overwriting the timestamp buffer.
4385 Debugging no longer uses the tod_stamp() function when +timestamp is set.
4387 PH/08 When the original message was included in an autoreply transport, it
4388 always said "this is a copy of the message, including all the headers",
4389 even if body_only or headers_only was set. It now gives an appropriate
4392 PH/09 Applied a patch from the Sieve maintainer which:
4394 o fixes some comments
4395 o adds the (disabled) notify extension core
4396 o adds some debug output for the result of if/elsif tests
4397 o points to the current vacation draft in the documentation
4398 and documents the missing references header update
4402 o fixes a bug in processing the envelope test (when testing
4403 multiple envelope elements, the last element determined the
4406 PH/10 Exim was violating RFC 3834 ("Recommendations for Automatic Responses to
4407 Electronic Mail") by including:
4409 Auto-submitted: auto-generated
4411 in the messages that it generates (bounce messages and others, such as
4412 warnings). In the case of bounce messages for non-SMTP messages, there was
4413 also a typo: it was using "Auto_submitted" (underscore instead of
4414 hyphen). Since every message generated by Exim is necessarily in response
4415 to another message, thes have all been changed to:
4417 Auto-Submitted: auto-replied
4419 in accordance with these statements in the RFC:
4421 The auto-replied keyword:
4423 - SHOULD be used on messages sent in direct response to another
4424 message by an automatic process,
4426 - MUST NOT be used on manually-generated messages,
4428 - MAY be used on Delivery Status Notifications (DSNs) and Message
4429 Disposition Notifications (MDNs),
4431 - MUST NOT be used on messages generated by automatic or periodic
4432 processes, except for messages which are automatic responses to
4435 PH/11 Added "${if def:sender_address {(envelope-from <$sender_address>)\n\t}}"
4436 to the default Received: header definition.
4438 PH/12 Added log selector acl_warn_skipped (default on).
4440 PH/13 After a successful wildlsearch lookup, discard the values of numeric
4441 variables because (a) they are in the wrong storage pool and (b) even if
4442 they were copied, it wouldn't work properly because of the caching.
4444 PH/14 Add check_rfc2047_length to disable enforcement of RFC 2047 length
4445 checking when decoding. Apparently there are clients that generate
4446 overlong encoded strings. Why am I not surprised?
4448 PH/15 If the first argument of "${if match_address" was not empty, but did not
4449 contain an "@" character, Exim crashed. Now it writes a panic log message
4450 and treats the condition as false.
4452 PH/16 In autoreply, treat an empty string for "once" the same as unset.
4454 PH/17 A further patch from the Sieve maintainer: "Introduce the new Sieve
4455 extension "envelope-auth". The code is finished and in agreement with
4456 other implementations, but there is no documentation so far and in fact,
4457 nobody wrote the draft yet. This extension is currently #undef'ed, thus
4458 not changing the active code.
4460 Print executed "if" and "elsif" statements when debugging is used. This
4461 helps a great deal to understand what a filter does.
4463 Document more things not specified clearly in RFC3028. I had all this
4464 sorted out, when out of a sudden new issues came to my mind. Oops."
4466 PH/18 Exim was not recognizing the "net-" search type prefix in match_ip lists
4469 PH/19 Exim expands the IPv6 address given to -bh to its full non-abbreviated
4470 canonical form (as documented). However, after a host name lookup from
4471 the IP address, check_host() was doing a simple string comparison with
4472 addresses acquired from the DNS when checking that the found name did
4473 have the original IP as one of its addresses. Since any found IPv6
4474 addresses are likely to be in abbreviated form, the comparison could
4475 fail. Luckily, there already exists a function for doing the comparison
4476 by converting both addresses to binary, so now that is used instead of
4477 the text comparison.
4479 PH/20 There was another similar case to PH/19, when a complete host name was
4480 given in a host list; looking up its IP address could give an abbreviated
4481 form, whereas the current host's name might or might not be abbreviated.
4482 The same fix has been applied.
4488 PH/01 The ${base62: operator adjusted itself to base 36 when BASE_62 was
4489 set to 36 (for Darwin and Cygwin), but the ${base62d: operator did not.
4492 PH/02 Two minor problems detected in Cygwin: the os.{c,h} files had lost */ on
4493 the CVS lines, and there was a missing #if HAVE_IPV6 in host.c.
4495 PH/03 Typo: missing ".o" in src/pcre/Makefile.
4497 PH/04 Tighten up "personal" tests: Instead of testing for any "List-"
4498 header line, restrict the check to what is listed in RFCs 2369 and 2929.
4499 Also, for "Auto-Submitted", treat anything other than "no" as
4500 non-personal, in accordance with RFC 3834. (Previously it treated
4501 anything starting "auto-" as non-personal.)
4503 TF/01 The control=submission/name=... option had a problem with syntax
4504 errors if the name included a slash character. The /name= option
4505 now slurps the rest of the string, so it can include any characters
4506 but it must come last in the list of options (after /sender_retain
4509 PH/05 Some modifications to the interface to the fake nameserver for the new
4517 TK/01 Added the "success_on_redirect" address verification option. See
4518 NewStuff for rationale and an example.
4520 PH/01 Added support for SQLite, basic code supplied by David Woodhouse.
4522 PH/02 Patch to exigrep to allow it to work on syslog lines.
4524 PH/03 When creating an mbox file for a virus/spam scan, use fseek() instead of
4525 fread() to skip over the body file's header line, because in Cygwin the
4526 header line is locked and is inaccessible.
4528 PH/04 Added $message_exim_id, ultimately to replace $message_id (they will both
4529 co-exist for some time) to make it clear that it is the Exim ID that is
4530 referenced, not the Message-ID: header line.
4532 PH/05 Replaced all Tom's calls to snprintf() with calls to the internal
4533 string_format() function, because snprintf() does not exist on all
4536 PH/06 The use of forbid_filter_existstest now also locks out the use of the
4537 ${stat: expansion item.
4539 PH/07 Changed "SMTP protocol violation: synchronization error" into "SMTP
4540 protocol synchronization error", to keep the pedants happy.
4542 PH/08 Arrange for USE_INET_NTOA_FIX to be set in config.h for AIX systems as
4543 well as for IRIX systems, when gcc is being used. See the host.c source
4546 PH/09 Installed latest Cygwin configuration files from the Cygwin maintainer.
4548 PH/10 Named domain lists were not working if used in a queue_smtp_domains
4551 PH/11 Added support for the IGNOREQUOTA extension to LMTP, both to the lmtp
4552 transport and to the smtp transport in LMTP mode.
4554 TK/02 Remove one case of BASE64 error detection FTTB (undocumented anyway).
4556 PH/12 There was a missing call to search_tidyup() before the fork() in rda.c to
4557 run a filter in a subprocess. This could lead to confusion in subsequent
4558 lookups in the parent process. There should also be a search_tidyup() at
4559 the end of the subprocess.
4561 PH/13 Previously, if "verify = helo" was set in an ACL, the condition was true
4562 only if the host matched helo_try_verify_hosts, which caused the
4563 verification to occur when the EHLO/HELO command was issued. The ACL just
4564 tested the remembered result. Now, if a previous verification attempt has
4565 not happened, "verify = helo" does it there and then.
4567 JJ/01 exipick: added $message_exim_id variable (see 4.53-PH/04)
4569 TK/03 Fix log output including CR from clamd.
4571 PH/14 A reference to $reply_address when Reply-to: was empty and From: did not
4572 exist provoked a memory error which could cause a segfault.
4574 PH/15 Installed PCRE 6.2
4576 PH/17 Defined BIND_8_COMPAT in the Darwin os.h file.
4578 PH/18 Reversed 4.52/PH/17 because the HP-UX user found it wasn't the cause
4579 of the problem. Specifically, suggested +O2 rather than +O1 for the
4582 PH/19 Added sqlite_lock_timeout option (David Woodhouse's patch).
4584 PH/20 If a delivery was routed to a non-standard port by means of an SRV
4585 record, the port was not correctly logged when the outgoing_port log
4586 selector was set (it logged the transort's default port).
4588 PH/21 Added support for host-specific ports to manualroute, queryprogram,
4589 fallback_hosts, and "hosts" in the smtp transport.
4591 PH/22 If the log selector "outgoing_port" is set, the port is now also given on
4592 host errors such as "Connection refused".
4594 PH/23 Applied a patch to fix problems with exim-4.52 while doing radius
4595 authentication with radiusclient 0.4.9:
4597 - Error returned from rc_read_config was caught wrongly
4598 - Username/password not passed on to radius server due to wrong length.
4600 The presumption is that some radiusclient API changes for 4.51/PH/17
4601 were not taken care of correctly. The code is still untested by me (my
4602 Linux distribution still has 0.3.2 of radiusclient), but it was
4603 contributed by a Radius user.
4605 PH/24 When doing a callout, the value of $domain wasn't set correctly when
4606 expanding the "port" option of the smtp transport.
4608 TK/04 MIME ACL: Fix buffer underrun that occurs when EOF condition is met
4609 while reading a MIME header. Thanks to Tom Hughes for a patch.
4611 PH/24 Include config.h inside local_scan.h so that configuration settings are
4614 PH/25 Make $smtp_command_argument available after all SMTP commands. This means
4615 that in an ACL for RCPT (for example), you can examine exactly what was
4618 PH/26 Exim was recognizing IPv6 addresses of the form [IPv6:....] in EHLO
4619 commands, but it was not correctly comparing the address with the actual
4620 client host address. Thus, it would show the EHLO address in Received:
4621 header lines when this was not necessary.
4623 PH/27 Added the % operator to ${eval:}.
4625 PH/28 Exim tries to create and chdir to its spool directory when it starts;
4626 it should be ignoring failures (because with -C, for example, it has lost
4627 privilege). It wasn't ignoring creation failures other than "already
4630 PH/29 Added "crypteq" to the list of supported features that Exim outputs when
4633 PH/30 Fixed (presumably very longstanding) bug in exim_dbmbuild: if it failed
4634 because an input line was too long, either on its own, or by virtue of
4635 too many continuations, the temporary file was not being removed, and the
4636 return code was incorrect.
4638 PH/31 Missing "BOOL" in function definition in filtertest.c.
4640 PH/32 Applied Sieve patches from the maintainer.
4642 TK/05 Domainkeys: Accomodate for a minor API change in libdomainkeys 0.67.
4644 PH/33 Added "verify = not_blind".
4646 PH/34 There are settings for CHOWN_COMMAND and MV_COMMAND that can be used in
4647 Local/Makefile (with some defaults set). These are used in built scripts
4648 such as exicyclog, but they have never been used in the exim_install
4649 script (though there are many overriding facilities there). I have
4650 arranged that the exim_install script now takes note of these two
4653 PH/35 Installed configuration files for Dragonfly.
4655 PH/36 When a locally submitted message by a trusted user did not contain a
4656 From: header, and the sender address was obtained from -f or from an SMTP
4657 MAIL command, and the trusted user did not use -F to supply a sender
4658 name, $originator_name was incorrectly used when constructing a From:
4659 header. Furthermore, $originator_name was used for submission mode
4660 messages from external hosts without From: headers in a similar way,
4661 which is clearly wrong.
4663 PH/37 Added control=suppress_local_fixups.
4665 PH/38 When log_selector = +received_sender was set, and the addition of the
4666 sender made the log line's construction buffer exactly full, or one byte
4667 less than full, an overflow happened when the terminating "\n" was
4670 PH/39 Added a new log selector, "unknown_in_list", which provokes a log entry
4671 when the result of a list match is failure because a DNS lookup failed.
4673 PH/40 RM_COMMAND is now used in the building process.
4675 PH/41 Added a "distclean" target to the top-level Makefile; it deletes all
4676 the "build-* directories that it finds.
4678 PH/42 (But a TF fix): In a domain list, Exim incorrectly matched @[] if the IP
4679 address in a domain literal was a prefix of an interface address.
4681 PH/43 (Again a TF fix): In the dnslookup router, do not apply widen_domains
4682 when verifying a sender address, unless rewrite_headers is false.
4684 PH/44 Wrote a long comment about why errors_to addresses are verified as
4685 recipients, not senders.
4687 TF/01 Add missing LIBS=-lm to OS/Makefile-OpenBSD which was overlooked when
4688 the ratelimit ACL was added.
4690 PH/45 Added $smtp_command for the full command (cf $smtp_command_argument).
4692 PH/46 Added extra information about PostgreSQL errors to the error string.
4694 PH/47 Added an interface to a fake DNS resolver for use by the new test suite,
4695 avoiding the need to install special zones in a real server. This is
4696 backwards compatible; if it can't find the fake resolver, it drops back.
4697 Thus, both old and new test suites can be run.
4699 TF/02 Added util/ratelimit.pl
4701 TF/03 Minor fix to the ratelimit code to improve its behaviour in case the
4702 clock is set back in time.
4704 TF/04 Fix the ratelimit support in exim_fixdb. Patch provided by Brian
4705 Candler <B.Candler@pobox.com>.
4707 TF/05 The fix for PH/43 was not completely correct; widen_domains is always
4708 OK for addresses that are the result of redirections.
4710 PH/48 A number of further additions for the benefit of the new test suite,
4711 including a fake gethostbyname() that interfaces to the fake DNS resolver
4714 TF/06 The fix for widen_domains has also been applied to qualify_single and
4715 search_parents which are the other dnslookup options that can cause
4718 PH/49 Michael Haardt's randomized retrying, but as a separate retry parameter
4721 PH/50 Make never_users, trusted_users, admin_groups, trusted_groups expandable.
4723 TF/07 Exim produced the error message "an SRV record indicated no SMTP
4724 service" if it encountered an MX record with an empty target hostname.
4725 The message is now "an MX or SRV record indicated no SMTP service".
4727 TF/08 Change PH/13 introduced the possibility that verify=helo may defer,
4728 if the DNS of the sending site is misconfigured. This is quite a
4729 common situation. This change restores the behaviour of treating a
4730 helo verification defer as a failure.
4732 PH/51 If self=fail was set on a router, the bounce message did not include the
4733 actual error message.
4739 TF/01 Added support for Client SMTP Authorization. See NewStuff for details.
4741 PH/01 When a transport filter timed out in a pipe delivery, and the pipe
4742 command itself ended in error, the underlying message about the transport
4743 filter timeout was being overwritten with the pipe command error. Now the
4744 underlying error message should be appended to the second error message.
4746 TK/01 Fix poll() being unavailable on Mac OSX 10.2.
4748 PH/02 Reduce the amount of output that "make" produces by default. Full output
4749 can still be requested.
4751 PH/03 The warning log line about a condition test deferring for a "warn" verb
4752 was being output only once per connection, rather than after each
4753 occurrence (because it was using the same function as for successful
4754 "warn" verbs). This seems wrong, so I have changed it.
4756 TF/02 Two buglets in acl.c which caused Exim to read a few bytes of memory that
4757 it should not have, which might have caused a crash in the right
4758 circumstances, but probably never did.
4760 PH/04 Installed a modified version of Tony Finch's patch to make submission
4761 mode fix the return path as well as the Sender: header line, and to
4762 add a /name= option so that you can make the user's friendly name appear
4765 TF/03 Added the control = fakedefer ACL modifier.
4767 TF/04 Added the ratelimit ACL condition. See NewStuff for details. Thanks to
4768 Mark Lowes for thorough testing.
4770 TK/02 Rewrote SPF support to work with libspf2 versions >1.2.0.
4772 TK/03 Merged latest SRS patch from Miles Wilton.
4774 PH/05 There's a shambles in IRIX6 - it defines EX_OK in unistd.h which conflicts
4775 with the definition in sysexits.h (which is #included earlier).
4776 Fortunately, Exim does not actually use EX_OK. The code used to try to
4777 preserve the sysexits.h value, by assuming that macro definitions were
4778 scanned for macro replacements. I have been disabused of this notion,
4779 so now the code just undefines EX_OK before #including unistd.h.
4781 PH/06 There is a timeout for writing blocks of data, set by, e.g. data_timeout
4782 in the smtp transport. When a block could not be written in a single
4783 write() function, the timeout was being re-applied to each part-write.
4784 This seems wrong - if the receiver was accepting one byte at a time it
4785 would take for ever. The timeout is now adjusted when this happens. It
4786 doesn't have to be particularly precise.
4788 TK/04 Added simple SPF lookup method in EXPERIMENTAL_SPF. See NewStuff for
4789 details. Thanks to Chris Webb <chris@arachsys.com> for the patch!
4791 PH/07 Added "fullpostmaster" verify option, which does a check to <postmaster>
4792 without a domain if the check to <postmaster@domain> fails.
4794 SC/01 Eximstats: added -xls and the ability to specify output files
4795 (patch written by Frank Heydlauf).
4797 SC/02 Eximstats: use FileHandles for outputting results.
4799 SC/03 Eximstats: allow any combination of xls, txt, and html output.
4801 SC/04 Eximstats: fixed display of large numbers with -nvr option
4803 SC/05 Eximstats: fixed merging of reports with empty tables.
4805 SC/06 Eximstats: added the -include_original_destination flag
4807 SC/07 Eximstats: removed tabs and trailing whitespace.
4809 TK/05 Malware: Improve on aveserver error handling. Patch from Alex Miller.
4811 TK/06 MBOX spool code: Add real "From " MBOX separator line
4812 so the .eml file is really in mbox format (even though
4813 most programs do not really care). Patch from Alex Miller.
4815 TK/07 MBOX spool code: Add X-Envelope-From: and X-Envelope-To: headers.
4816 The latter is generated from $received_to and is only set if the
4817 message has one envelope recipient. SA can use these headers,
4818 obviously out-of-the-box. Patch from Alex Miller.
4820 PH/08 The ${def test on a variable was returning false if the variable's
4821 value was "0", contrary to what the specification has always said!
4822 The result should be true unless the variable is empty.
4824 PH/09 The syntax error of a character other than { following "${if
4825 def:variable_name" (after optional whitespace) was not being diagnosed.
4826 An expansion such as ${if def:sender_ident:{xxx}{yyy}} in which an
4827 accidental colon was present, for example, could give incorrect results.
4829 PH/10 Tidied the code in a number of places where the st_size field of a stat()
4830 result is used (not including appendfile, where other changes are about
4833 PH/11 Upgraded appendfile so that quotas larger than 2G are now supported.
4834 This involved changing a lot of size variables from int to off_t. It
4835 should work with maildirs and everything.
4837 TK/08 Apply fix provided by Michael Haardt to prevent deadlock in case of
4838 spamd dying while we are connected to it.
4840 TF/05 Fixed a ${extract error message typo reported by Jeremy Harris
4843 PH/12 Applied Alex Kiernan's patch for the API change for the error callback
4844 function for BDB 4.3.
4846 PH/13 Changed auto_thaw such that it does not apply to bounce messages.
4848 PH/14 Imported PCRE 6.0; this was more than just a trivial operation because
4849 the sources for PCRE have been re-arranged and more files are now
4852 PH/15 The code I had for printing potentially long long variables in PH/11
4853 above was not the best (it lost precision). The length of off_t variables
4854 is now inspected at build time, and an appropriate printing format (%ld
4855 or %lld) is chosen and #defined by OFF_T_FMT. We also define LONGLONG_T
4856 to be "long long int" or "long int". This is needed for the internal
4857 formatting function string_vformat().
4859 PH/16 Applied Matthew Newton's patch to exicyclog: "If log_file_path is set in
4860 the configuration file to be ":syslog", then the script "guesses" where
4861 the logs files are, rather than using the compiled in default. In our
4862 case the guess is not the same as the compiled default, so the script
4863 suddenly stopped working when I started to use syslog. The patch checks
4864 to see if log_file_path is "". If so, it attempts to read it from exim
4865 with no configuration file to get the compiled in version, before it
4866 falls back to the previous guessing code."
4868 TK/09 Added "prvs" and "prvscheck" expansion items. These help a lot with
4869 implementing BATV in an Exim configuration. See NewStuff for the gory
4872 PH/17 Applied Michael Haardt's patch for HP-UX, affecting only the os.h and
4873 Makefile that are specific to HP-UX.
4875 PH/18 If the "use_postmaster" option was set for a recipient callout together
4876 with the "random" option, the postmaster address was used as the MAIL
4877 FROM address for the random test, but not for the subsequent recipient
4878 test. It is now used for both.
4880 PH/19 Applied Michael Haardt's patch to update Sieve to RFC3028bis. "The
4881 patch removes a few documentation additions to RFC 3028, because the
4882 latest draft now contains them. It adds the new en;ascii-case comparator
4883 and a new error check for 8bit text in MIME parts. Comparator and
4884 require names are now matched exactly. I enabled the subaddress
4885 extension, but it is not well tested yet (read: it works for me)."
4887 PH/20 Added macros for time_t as for off_t (see PH/15 above) and used them to
4888 rework some of the code of TK/09 above to avoid the hardwired use of
4889 "%lld" and "long long". Replaced the call to snprintf() with a call to
4892 PH/21 Added some other messages to those in 4.51/PH/42, namely "All relevant MX
4893 records point to non-existent hosts", "retry timeout exceeded", and
4894 "retry time not reached for any host after a long failure period".
4896 PH/22 Fixed some oversights/typos causing bugs when Exim is compiled with
4897 experimental DomainKeys support:
4899 (1) The filter variables $n0-$n9 and $sn0-$sn9 were broken.
4900 (2) On an error such as an illegally used "control", the wrong name for
4901 the control was given.
4903 These problems did NOT occur unless DomainKeys support was compiled.
4905 PH/23 Added daemon_startup_retries and daemon_startup_sleep.
4907 PH/24 Added ${if match_ip condition.
4909 PH/25 Put debug statements on either side of calls to EXIM_DBOPEN() for hints
4910 databases so that it will be absolutely obvious if a crash occurs in the
4911 DB library. This is a regular occurrence (often caused by mis-matched
4914 PH/26 Insert a lot of missing (void) casts for functions such as chown(),
4915 chmod(), fcntl(), sscanf(), and other functions from stdio.h. These were
4916 picked up on a user's system that detects such things. There doesn't seem
4917 to be a gcc warning option for this - only an attribute that has to be
4918 put on the function's prototype. It seems that in Fedora Core 4 they have
4919 set this on a number of new functions. No doubt there will be more in due
4922 PH/27 If a dnslookup or manualroute router is set with verify=only, it need not
4923 specify a transport. However, if an address that was verified by such a
4924 router was the subject of a callout, Exim crashed because it tried to
4925 read the rcpt_include_affixes from the non-existent transport. Now it
4926 just assumes that the setting of that option is false. This bug was
4927 introduced by 4.51/PH/31.
4929 PH/28 Changed -d+all to exclude +memory, because that information is very
4930 rarely of interest, but it makes the output a lot bigger. People tend to
4931 do -d+all out of habit.
4933 PH/29 Removed support for the Linux-libc5 build, as it is obsolete and the
4934 code in os-type was giving problems when libc.so lives in lib64, like on
4937 PH/30 Exim's DNS code uses the original T_xxx names for DNS record times. These
4938 aren't the modern standard, and it seems that some systems' include files
4939 don't always have them. Exim was already checking for some of the newer
4940 ones like T_AAAA, and defining it itself. I've added checks for all the
4941 record types that Exim uses.
4943 PH/31 When using GnuTLS, if the parameters cache file did not exist, Exim was
4944 not automatically generating a new one, as it is supposed to. This
4945 prevented TLS from working. If the file did exist, but contained invalid
4946 data, a new version was generated, as expected. It was only the case of a
4947 non-existent file that was broken.
4949 TK/10 Domainkeys: Fix a bug in verification that caused a crash in conjunction
4950 with a change in libdomainkeys > 0.64.
4952 TK/11 Domainkeys: Change the logic how the "testing" policy flag is retrieved
4953 from DNS. If the selector record carries the flag, it now has
4954 precedence over the domain-wide flag.
4956 TK/12 Cleared some compiler warnings related to SPF, SRS and DK code.
4958 PH/32 In mua_wrapper mode, if an smtp transport configuration error (such as
4959 the use of a port name that isn't defined in /etc/services) occurred, the
4960 message was deferred as in a normal delivery, and thus remained on the
4961 spool, instead of being failed because of the mua_wrapper setting. This
4962 is now fixed, and I tidied up some of the mua_wrapper messages at the
4965 SC/08 Eximstats: whilst parsing the mainlog(s), store information about
4966 the messages in a hash of arrays rather than using individual hashes.
4967 This is a bit cleaner and results in dramatic memory savings, albeit
4968 at a slight CPU cost.
4970 SC/09 Eximstats: added the -show_rt<list> and the -show_dt<list> flags
4971 as requested by Marc Sherman.
4973 SC/10 Eximstats: added histograms for user specified patterns as requested
4976 SC/11 Eximstats: v1.43 - bugfix for pattern histograms with -h0 specified.
4978 PH/33 Patch from the Cygwin maintainer to add "b" to all occurences of
4979 fopen() in the content-scanning modules that did not already have it.
4985 TK/01 Added Yahoo DomainKeys support via libdomainkeys. See
4986 doc/experimental-spec.txt for details. (http://domainkeys.sf.net)
4988 TK/02 Fix ACL "control" statement not being available in MIME ACL.
4990 TK/03 Fix ACL "regex" condition not being available in MIME ACL.
4992 PH/01 Installed a patch from the Sieve maintainer that allows -bf to be used
4993 to test Sieve filters that use "vacation".
4995 PH/02 Installed a slightly modified version of Nikos Mavrogiannopoulos' patch
4996 that changes the way the GnuTLS parameters are stored in the cache file.
4997 The new format can be generated externally. For backward compatibility,
4998 if the data in the cache doesn't make sense, Exim assumes it has read an
4999 old-format file, and it generates new data and writes a new file. This
5000 means that you can't go back to an older release without removing the
5003 PH/03 A redirect router that has both "unseen" and "one_time" set does not
5004 work if there are any delivery delays because "one_time" forces the
5005 parent to be marked "delivered", so its unseen clone is never tried
5006 again. For this reason, Exim now forbids the simultaneous setting of
5009 PH/04 Change 4.11/85 fixed an obscure bug concerned with addresses that are
5010 redirected to themselves ("homonym" addresses). Read the long ChangeLog
5011 entry if you want to know the details. The fix, however, neglected to
5012 consider the case when local delivery batching is involved. The test for
5013 "previously delivered" was not happening when checking to see if an
5014 address could be batched with a previous (undelivered) one; under
5015 certain circumstances this could lead to multiple deliveries to the same
5018 PH/05 Renamed the macro SOCKLEN_T as EXIM_SOCKLEN_T because AIX uses SOCKLEN_T
5019 in its include files, and this causes problems building Exim.
5021 PH/06 A number of "verify =" ACL conditions have no options (e.g. verify =
5022 header_syntax) but Exim was just ignoring anything given after a slash.
5023 In particular, this caused confusion with an attempt to use "verify =
5024 reverse_host_lookup/defer_ok". An error is now given when options are
5025 supplied for verify items that do not have them. (Maybe reverse_host_
5026 lookup should have a defer_ok option, but that's a different point.)
5028 PH/07 Increase the size of the buffer for incoming SMTP commands from 512 (as
5029 defined by RFC 821) to 2048, because there were problems with some AUTH
5030 commands, and RFC 1869 says the size should be increased for extended
5031 SMTP commands that take arguments.
5033 PH/08 Added ${dlfunc dynamically loaded function for expansion (code from Tony
5036 PH/09 Previously, an attempt to use ${perl when it wasn't compiled gave an
5037 "unknown" error; now it says that the functionality isn't in the binary.
5039 PH/10 Added a nasty fudge to try to recognize and flatten LDAP passwords in
5040 an address' error message when a string expansion fails (syntax or
5041 whatever). Otherwise the password may appear in the log. Following change
5042 PH/42 below, there is no longer a chance of it appearing in a bounce
5045 PH/11 Installed exipick version 20050225.0 from John Jetmore.
5047 PH/12 If the last host in a fallback_hosts list was multihomed, only the first
5048 of its addresses was ever tried. (Bugzilla bug #2.)
5050 PH/13 If "headers_add" in a transport didn't end in a newline, Exim printed
5051 the result incorrectly in the debug output. (It correctly added a newline
5052 to what was transported.)
5054 TF/01 Added $received_time.
5056 PH/14 Modified the default configuration to add an acl_smtp_data ACL, with
5057 commented out examples of how to interface to a virus scanner and to
5058 SpamAssassin. Also added commented examples of av_scanner and
5059 spamd_address settings.
5061 PH/15 Further to TK/02 and TK/03 above, tidied up the tables of what conditions
5062 and controls are allowed in which ACLs. There were a couple of minor
5063 errors. Some of the entries in the conditions table (which is a table of
5064 where they are NOT allowed) were getting very unwieldy; rewrote them as a
5065 negation of where the condition IS allowed.
5067 PH/16 Installed updated OS/os.c-cygwin from the Cygwin maintainer.
5069 PH/17 The API for radiusclient changed at release 0.4.0. Unfortunately, the
5070 header file does not have a version number, so I've had to invent a new
5071 value for RADIUS_LIB_TYPE, namely "RADIUSCLIENTNEW" to request the new
5072 API. The code is untested by me (my Linux distribution still has 0.3.2 of
5073 radiusclient), but it was contributed by a Radius user.
5075 PH/18 Installed Lars Mainka's patch for the support of CRL collections in
5076 files or directories, for OpenSSL.
5078 PH/19 When an Exim process that is running as root has to create an Exim log
5079 file, it does so in a subprocess that runs as exim:exim so as to get the
5080 ownership right at creation (otherwise, other Exim processes might see
5081 the file with the wrong ownership). There was no test for failure of this
5082 fork() call, which would lead to the process getting stuck as it waited
5083 for a non-existent subprocess. Forks do occasionally fail when resources
5084 run out. I reviewed all the other calls to fork(); they all seem to check
5087 PH/20 When checking for unexpected SMTP input at connect time (before writing
5088 the banner), Exim was not dealing correctly with a non-positive return
5089 from the read() function. If the client had disconnected by this time,
5090 the result was a log entry for a synchronization error with an empty
5091 string after "input=" when read() returned zero. If read() returned -1
5092 (an event I could not check), uninitialized data bytes were printed.
5093 There were reports of junk text (parts of files, etc) appearing after
5096 PH/21 Added acl_not_smtp_mime to allow for MIME scanning for non-SMTP messages.
5098 PH/22 Added support for macro redefinition, and (re)definition in between
5099 driver and ACL definitions.
5101 PH/23 The cyrus_sasl authenticator was expanding server_hostname, but then
5102 forgetting to use the resulting value; it was using the unexpanded value.
5104 PH/24 The cyrus_sasl authenticator was advertising mechanisms for which it
5105 hadn't been configured. The fix is from Juergen Kreileder, who
5106 understands it better than I do:
5108 "Here's what I see happening with three configured cyrus_sasl
5109 authenticators configured (plain, login, cram-md5):
5111 On startup auth_cyrus_sasl_init() gets called for each of these.
5112 This means three calls to sasl_listmech() without a specified mech_list.
5113 => SASL tests which mechs of all available mechs actually work
5114 => three warnings about OTP not working
5115 => the returned list contains: plain, login, cram-md5, digest-md5, ...
5117 With the patch, sasl_listmech() also gets called three times. But now
5118 SASL's mech_list option is set to the server_mech specified in the the
5119 authenticator. Or in other words, the answer from sasl_listmech()
5120 gets limited to just the mech you're testing for (which is different
5122 => the return list contains just 'plain' or 'login', 'cram-md5' or
5123 nothing depending on the value of ob->server_mech.
5125 I've just tested the patch: Authentication still works fine,
5126 unavailable mechs specified in the exim configuration are still
5127 caught, and the auth.log warnings about OTP are gone."
5129 PH/25 When debugging is enabled, the contents of the command line are added
5130 to the debugging output, even when log_selector=+arguments is not
5133 PH/26 Change scripts/os-type so that when "uname -s" returns just "GNU", the
5134 answer is "GNU", and only if the return is "GNU/something" is the answer
5137 PH/27 $acl_verify_message is now set immediately after the failure of a
5138 verification in an ACL, and so is available in subsequent modifiers. In
5139 particular, the message can be preserved by coding like this:
5141 warn !verify = sender
5142 set acl_m0 = $acl_verify_message
5144 Previously, $acl_verify_message was set only while expanding "message"
5145 and "log_message" when a very denied access.
5147 PH/28 Modified OS/os.c-Linux with
5149 -#ifndef OS_LOAD_AVERAGE
5150 +#if !defined(OS_LOAD_AVERAGE) && defined(__linux__)
5152 to make Exim compile on kfreebsd-gnu. (I'm totally confused about the
5153 nomenclature these days.)
5155 PH/29 Installed patch from the Sieve maintainer that adds the options
5156 sieve_useraddress and sieve_subaddress to the redirect router.
5158 PH/30 In these circumstances:
5159 . Two addresses routed to the same list of hosts;
5160 . First host does not offer TLS;
5161 . First host accepts first address;
5162 . First host gives temporary error to second address;
5163 . Second host offers TLS and a TLS session is established;
5164 . Second host accepts second address.
5165 Exim incorrectly logged both deliveries with the TLS parameters (cipher
5166 and peerdn, if requested) that were in fact used only for the second
5169 PH/31 When doing a callout as part of verifying an address, Exim was not paying
5170 attention to any local part prefix or suffix that was matched by the
5171 router that accepted the address. It now behaves in the same way as it
5172 does for delivery: the affixes are removed from the local part unless
5173 rcpt_include_affixes is set on the transport.
5175 PH/32 Add the sender address, as F=<...>, to the log line when logging a
5176 timeout during the DATA phase of an incoming message.
5178 PH/33 Sieve envelope tests were broken for match types other than :is. I have
5179 applied a patch sanctioned by the Sieve maintainer.
5181 PH/34 Change 4.50/80 broke Exim in that it could no longer handle cases where
5182 the uid or gid is negative. A case of a negative gid caused this to be
5183 noticed. The fix allows for either to be negative.
5185 PH/35 ACL_WHERE_MIME is now declared unconditionally, to avoid too much code
5186 clutter, but the tables that are indexed by ACL_WHERE_xxx values had been
5189 PH/36 The change PH/12 above was broken. Fixed it.
5191 PH/37 Exim used to check for duplicate addresses in the middle of routing, on
5192 the grounds that routing the same address twice would always produce the
5193 same answer. This might have been true once, but it is certainly no
5194 longer true now. Routing a child address may depend on the previous
5195 routing that produced that child. Some complicated redirection strategies
5196 went wrong when messages had multiple recipients, and made Exim's
5197 behaviour dependent on the order in which the addresses were given.
5199 I have moved the duplicate checking until after the routing is complete.
5200 Exim scans the addresses that are assigned to local and remote
5201 transports, and removes any duplicates. This means that more work will be
5202 done, as duplicates will always all be routed, but duplicates are
5203 presumably rare, so I don't expect this is of any significance.
5205 For deliveries to pipes, files, and autoreplies, the duplicate checking
5206 still happens during the routing process, since they are not going to be
5209 PH/38 Installed a patch from Ian Freislich, with the agreement of Tom Kistner.
5210 It corrects a timeout issue with spamd. This is Ian's comment: "The
5211 background is that sometimes spamd either never reads data from a
5212 connection it has accepted, or it never writes response data. The exiscan
5213 spam.[ch] uses a 3600 second timeout on spamd socket reads, further, it
5214 blindly assumes that writes won't block so it may never time out."
5216 PH/39 Allow G after quota size as well as K and M.
5218 PH/40 The value set for $authenticated_id in an authenticator may not contain
5219 binary zeroes or newlines because the value is written to log lines and
5220 to spool files. There was no check on this. Now the value is run through
5221 the string_printing() function so that such characters are converted to
5222 printable escape sequences.
5224 PH/41 $message_linecount is a new variable that contains the total number of
5225 lines in the message. Compare $body_linecount, which is the count for the
5228 PH/42 Exim no longer gives details of delivery errors for specific addresses in
5229 bounce and delay warning messages, except in certain special cases, which
5232 (a) An SMTP error message from a remote host;
5233 (b) A message specified in a :fail: redirection;
5234 (c) A message specified in a "fail" command in a system filter;
5235 (d) A message specified in a FAIL return from the queryprogram router;
5236 (e) A message specified by the cannot_route_message router option.
5238 In these cases only, Exim does include the error details in bounce and
5239 warning messages. There are also a few cases where bland messages such
5240 as "unrouteable address" or "local delivery error" are given.
5242 PH/43 $value is now also set for the "else" part of a ${run expansion.
5244 PH/44 Applied patch from the Sieve maintainer: "The vacation draft is still
5245 being worked on, but at least Exim now implements the latest version to
5248 PH/45 In a pipe transport, although a timeout while waiting for the pipe
5249 process to complete was treated as a delivery failure, a timeout while
5250 writing the message to the pipe was logged, but erroneously treated as a
5251 successful delivery. Such timeouts include transport filter timeouts. For
5252 consistency with the overall process timeout, these timeouts are now
5253 treated as errors, giving rise to delivery failures by default. However,
5254 there is now a new Boolean option for the pipe transport called
5255 timeout_defer, which, if set TRUE, converts the failures into defers for
5256 both kinds of timeout. A transport filter timeout is now identified in
5259 PH/46 The "scripts/Configure-config.h" script calls "make" at one point. On
5260 systems where "make" and "gmake" are different, calling "gmake" at top
5261 level broke things. I've arranged for the value of $(MAKE) to be passed
5262 from the Makefile to this script so that it can call the same version of
5266 A note about Exim versions 4.44 and 4.50
5267 ----------------------------------------
5269 Exim 4.50 was meant to be the next release after 4.43. It contains a lot of
5270 changes of various kinds. As a consequence, a big documentation update was
5271 needed. This delayed the release for rather longer than seemed good, especially
5272 in the light of a couple of (minor) security issues. Therefore, the changes
5273 that fixed bugs were backported into 4.43, to create a 4.44 maintenance
5274 release. So 4.44 and 4.50 are in effect two different branches that both start
5277 I have left the 4.50 change log unchanged; it contains all the changes since
5278 4.43. The change log for 4.44 is below; many of its items are identical to
5279 those for 4.50. This seems to be the most sensible way to preserve the
5280 historical information.
5286 1. Minor wording change to the doc/README.SIEVE file.
5288 2. Change 4.43/35 introduced a bug: if quota_filecount was set, the
5289 computation of the current number of files was incorrect.
5291 3. Closing a stable door: arrange to panic-die if setitimer() ever fails. The
5292 bug fixed in 4.43/37 would have been diagnosed quickly if this had been in
5295 4. Give more explanation in the error message when the command for a transport
5296 filter fails to execute.
5298 5. There are several places where Exim runs a non-Exim command in a
5299 subprocess. The SIGUSR1 signal should be disabled for these processes. This
5300 was being done only for the command run by the queryprogram router. It is
5301 now done for all such subprocesses. The other cases are: ${run, transport
5302 filters, and the commands run by the lmtp and pipe transports.
5304 6. Added CONFIGURE_GROUP build-time option.
5306 7. Some older OS have a limit of 256 on the maximum number of file
5307 descriptors. Exim was using setrlimit() to set 1000 as a large value
5308 unlikely to be exceeded. Change 4.43/17 caused a lot of logging on these
5309 systems. I've change it so that if it can't get 1000, it tries for 256.
5311 8. "control=submission" was allowed, but had no effect, in a DATA ACL. This
5312 was an oversight, and furthermore, ever since the addition of extra
5313 controls (e.g. 4.43/32), the checks on when to allow different forms of
5314 "control" were broken. There should now be diagnostics for all cases when a
5315 control that does not make sense is encountered.
5317 9. Added the /retain_sender option to "control=submission".
5319 10. $recipients is now available in the predata ACL (oversight).
5321 11. Tidy the search cache before the fork to do a delivery from a message
5322 received from the command line. Otherwise the child will trigger a lookup
5323 failure and thereby defer the delivery if it tries to use (for example) a
5324 cached ldap connection that the parent has called unbind on.
5326 12. If verify=recipient was followed by verify=sender in a RCPT ACL, the value
5327 of $address_data from the recipient verification was clobbered by the
5328 sender verification.
5330 13. The value of address_data from a sender verification is now available in
5331 $sender_address_data in subsequent conditions in the ACL statement.
5333 14. Added forbid_sieve_filter and forbid_exim_filter to the redirect router.
5335 15. Added a new option "connect=<time>" to callout options, to set a different
5338 16. If FIXED_NEVER_USERS was defined, but empty, Exim was assuming the uid 0
5339 was its contents. (It was OK if the option was not defined at all.)
5341 17. A "Completed" log line is now written for messages that are removed from
5342 the spool by the -Mrm option.
5344 18. New variables $sender_verify_failure and $recipient_verify_failure contain
5345 information about exactly what failed.
5347 19. Added -dd to debug only the daemon process.
5349 20. Incorporated Michael Haardt's patch to ldap.c for improving the way it
5350 handles timeouts, both on the server side and network timeouts. Renamed the
5351 CONNECT parameter as NETTIMEOUT (but kept the old name for compatibility).
5353 21. The rare case of EHLO->STARTTLS->HELO was setting the protocol to "smtp".
5354 It is now set to "smtps".
5356 22. $host_address is now set to the target address during the checking of
5357 ignore_target_hosts.
5359 23. When checking ignore_target_hosts for an ipliteral router, no host name was
5360 being passed; this would have caused $sender_host_name to have been used if
5361 matching the list had actually called for a host name (not very likely,
5362 since this list is usually IP addresses). A host name is now passed as
5365 24. Changed the calls that set up the SIGCHLD handler in the daemon to use the
5366 code that specifies a non-restarting handler (typically sigaction() in
5367 modern systems) in an attempt to fix a rare and obscure crash bug.
5369 25. Narrowed the window for a race in the daemon that could cause it to ignore
5370 SIGCHLD signals. This is not a major problem, because they are used only to
5371 wake it up if nothing else does.
5373 26. A malformed maildirsize file could cause Exim to calculate negative values
5374 for the mailbox size or file count. Odd effects could occur as a result.
5375 The maildirsize information is now recalculated if the size or filecount
5378 27. Added HAVE_SYS_STATVFS_H to the os.h file for Linux, as it has had this
5379 support for a long time. Removed HAVE_SYS_VFS_H.
5381 28. Installed the latest version of exipick from John Jetmore.
5383 29. In an address list, if the pattern was not a regular expression, an empty
5384 subject address (from a bounce message) matched only if the pattern was an
5385 empty string. Non-empty patterns were not even tested. This was the wrong
5386 because it is perfectly reasonable to use an empty address as part of a
5387 database query. An empty address is now tested by patterns that are
5388 lookups. However, all the other forms of pattern expect the subject to
5389 contain a local part and a domain, and therefore, for them, an empty
5390 address still always fails if the pattern is not itself empty.
5392 30. Exim went into a mad DNS loop when attempting to do a callout where the
5393 host was specified on an smtp transport, and looking it up yielded more
5394 than one IP address.
5396 31. Re-factored the code for checking spool and log partition space into a
5397 function that finds that data and another that does the check. The former
5398 is then used to implement four new variables: $spool_space, $log_space,
5399 $spool_inodes, and $log_inodes.
5401 32. The RFC2047 encoding function was originally intended for short strings
5402 such as real names; it was not keeping to the 75-character limit for
5403 encoded words that the RFC imposes. It now respects the limit, and
5404 generates multiple encoded words if necessary. To be on the safe side, I
5405 have increased the buffer size for the ${rfc2047: expansion operator from
5408 33. It is now permitted to omit both strings after an "if" condition; if the
5409 condition is true, the result is "true". As before, when the second string
5410 is omitted, a false condition yields an empty string. This makes it less
5411 cumbersome to write custom ACL and router conditions.
5413 34. Failure to deliver a bounce message always caused it to be frozen, even if
5414 there was an errors_to setting on the router. The errors_to setting is now
5417 35. If an IPv6 address is given for -bh or -bhc, it is now converted to the
5418 canonical form (fully expanded) before being placed in
5419 $sender_host_address.
5421 36. The table in the code that translates DNS record types into text (T_A to
5422 "A" for instance) was missing entries for NS and CNAME. It is just possible
5423 that this could have caused confusion if both these types were looked up
5424 for the same domain, because the text type is used as part of Exim's
5425 per-process caching. But the chance of anyone hitting this buglet seems
5428 37. The dnsdb lookup has been extended in a number of ways.
5430 (1) There is a new type, "zns", which walks up the domain tree until it
5431 finds some nameserver records. It should be used with care.
5433 (2) There is a new type, "mxh", which is like "mx" except that it returns
5434 just the host names, not the priorities.
5436 (3) It is now possible to give a list of domains (or IP addresses) to be
5437 looked up. The behaviour when one of the lookups defers can be
5438 controlled by a keyword.
5440 (4) It is now possible to specify the separator character for use when
5441 multiple records are returned.
5443 38. The dnslists ACL condition has been extended: it is now possible to supply
5444 a list of IP addresses and/or domains to be looked up in a particular DNS
5447 39. Added log_selector=+queue_time_overall.
5449 40. When running the queue in the test harness, wait just a tad after forking a
5450 delivery process, to get repeatability of debugging output.
5452 41. Include certificate and key file names in error message when GnuTLS fails
5453 to set them up, because the GnuTLS error message doesn't include the name
5454 of the failing file when there is a problem reading it.
5456 42. Allow both -bf and -bF in the same test run.
5458 43. Did the same fix as 41 above for OpenSSL, which had the same infelicity.
5460 44. The "Exiscan patch" is now merged into the mainline Exim source.
5462 45. Sometimes the final signoff response after QUIT could fail to get
5463 transmitted in the non-TLS case. Testing !tls_active instead of tls_active
5464 < 0 before doing a fflush(). This bug looks as though it goes back to the
5465 introduction of TLS in release 3.20, but "sometimes" must have been rare
5466 because the tests only now provoked it.
5468 46. Reset the locale to "C" after calling embedded Perl, in case it was changed
5469 (this can affect the format of dates).
5471 47. exim_tidydb, when checking for the continued existence of a message for
5472 which it has found a message-specific retry record, was not finding
5473 messages that were in split spool directories. Consequently, it was
5474 deleting retry records that should have stayed in existence.
5476 48. Steve fixed some bugs in eximstats.
5478 49. The SPA authentication driver was not abandoning authentication and moving
5479 on to the next authenticator when an expansion was forced to fail,
5480 contradicting the general specification for all authenticators. Instead it
5481 was generating a temporary error. It now behaves as specified.
5483 50. The default ordering of permitted cipher suites for GnuTLS was pessimal
5484 (the order specifies the preference for clients). The order is now AES256,
5485 AES128, 3DES, ARCFOUR128.
5487 51. Small patch to Sieve code - explicitly set From: when generating an
5490 52. Exim crashed if a remote delivery caused a very long error message to be
5491 recorded - for instance if somebody sent an entire SpamAssassin report back
5492 as a large number of 550 error lines. This bug was coincidentally fixed by
5493 increasing the size of one of Exim's internal buffers (big_buffer) that
5494 happened as part of the Exiscan merge. However, to be on the safe side, I
5495 have made the code more robust (and fixed the comments that describe what
5498 53. Now that there can be additional text after "Completed" in log lines (if
5499 the queue_time_overall log selector is set), a one-byte patch to exigrep
5500 was needed to allow it to recognize "Completed" as not the last thing in
5503 54. The LDAP lookup was not handling a return of LDAP_RES_SEARCH_REFERENCE. A
5504 patch that reportedly fixes this has been added. I am not expert enough to
5505 create a test for it. This is what the patch creator wrote:
5507 "I found a little strange behaviour of ldap code when working with
5508 Windows 2003 AD Domain, where users was placed in more than one
5509 Organization Units. When I tried to give exim partial DN, the exit code
5510 of ldap_search was unknown to exim because of LDAP_RES_SEARCH_REFERENCE.
5511 But simultaneously result of request was absolutely normal ldap result,
5512 so I produce this patch..."
5514 Later: it seems that not all versions of LDAP support LDAP_RES_SEARCH_
5515 REFERENCE, so I have modified the code to exclude the patch when that macro
5518 55. Some experimental protocols are using DNS PTR records for new purposes. The
5519 keys for these records are domain names, not reversed IP addresses. The
5520 dnsdb PTR lookup now tests whether its key is an IP address. If not, it
5521 leaves it alone. Component reversal etc. now happens only for IP addresses.
5524 56. Improve error message when ldap_search() fails in OpenLDAP or Solaris LDAP.
5526 57. Double the size of the debug message buffer (to 2048) so that more of very
5527 long debug lines gets shown.
5529 58. The exicyclog utility now does better if the number of log files to keep
5530 exceeds 99. In this case, it numbers them 001, 002 ... instead of 01, 02...
5532 59. Two changes related to the smtp_active_hostname option:
5534 (1) $smtp_active_hostname is now available as a variable.
5535 (2) The default for smtp_banner uses $smtp_active_hostname instead
5536 of $primary_hostname.
5538 60. The host_aton() function is supposed to be passed a string that is known
5539 to be a valid IP address. However, in the case of IPv6 addresses, it was
5540 not checking this. This is a hostage to fortune. Exim now panics and dies
5541 if the condition is not met. A case was found where this could be provoked
5542 from a dnsdb PTR lookup with an IPv6 address that had more than 8
5543 components; fortuitously, this particular loophole had already been fixed
5544 by change 4.50/55 above.
5546 If there are any other similar loopholes, the new check in host_aton()
5547 itself should stop them being exploited. The report I received stated that
5548 data on the command line could provoke the exploit when Exim was running as
5549 exim, but did not say which command line option was involved. All I could
5550 find was the use of -be with a bad dnsdb PTR lookup, and in that case it is
5551 running as the user.
5554 61. There was a buffer overflow vulnerability in the SPA authentication code
5555 (which came originally from the Samba project). I have added a test to the
5556 spa_base64_to_bits() function which I hope fixes it.
5559 62. Configuration update for GNU/Hurd and variations. Updated Makefile-GNU and
5560 os.h-GNU, and added configuration files for GNUkFreeBSD and GNUkNetBSD.
5562 63. The daemon start-up calls getloadavg() while still root for those OS that
5563 need the first call to be done as root, but it missed one case: when
5564 deliver_queue_load_max is set with deliver_drop_privilege. This is
5565 necessary for the benefit of the queue runner, because there is no re-exec
5566 when deliver_drop_privilege is set.
5568 64. A call to exiwhat cut short delays set up by "delay" modifiers in ACLs.
5569 This has been fixed.
5571 65. Caching of lookup data for "hosts =" ACL conditions, when a named host list
5572 was in use, was not putting the data itself into the right store pool;
5573 consequently, it could be overwritten for a subsequent message in the same
5574 SMTP connection. (Fix 4.40/11 dealt with the non-cache case, but overlooked
5577 66. Added hosts_max_try_hardlimit to the smtp transport, default 50.
5579 67. The string_is_ip_address() function returns 0, 4, or 6, for "no an IP
5580 address", "IPv4 address", and "IPv6 address", respectively. Some calls of
5581 the function were treating the return as a boolean value, which happened to
5582 work because 0=false and not-0=true, but is not correct code.
5584 68. The host_aton() function was not handling scoped IPv6 addresses (those
5585 with, for example, "%eth0" on the end) correctly.
5587 69. Fixed some compiler warnings in acl.c for the bitmaps specified with
5588 negated items (that is, ~something) in unsigned ints. Some compilers
5589 apparently mutter when there is no cast.
5591 70. If an address verification called from an ACL failed, and did not produce a
5592 user-specific message (i.e. there was only a "system" message), nothing was
5593 put in $acl_verify_message. In this situation, it now puts the system
5596 71. Change 4.23/11 added synchronization checking at the start of an SMTP
5597 session; change 4.31/43 added the unwanted input to the log line - except
5598 that it did not do this in the start of session case. It now does.
5600 72. After a timeout in a callout SMTP session, Exim still sent a QUIT command.
5601 This is wrong and can cause the other end to generate a synchronization
5602 error if it is another Exim or anything else that does the synchronization
5603 check. A QUIT command is no longer sent after a timeout.
5605 73. $host_lookup_deferred has been added, to make it easier to detect DEFERs
5606 during host lookups.
5608 74. The defer_ok option of callout verification was not working if it was used
5609 when verifying addresses in header lines, that is, for this case:
5611 verify = header_sender/callout=defer_ok
5613 75. A backgrounded daemon closed stdin/stdout/stderr on entry; this meant that
5614 those file descriptors could be used for SMTP connections. If anything
5615 wrote to stderr (the example that came up was "warn" in embedded Perl), it
5616 could be sent to the SMTP client, causing chaos. The daemon now opens
5617 stdin, stdout, and stderr to /dev/null when it puts itself into the
5620 76. Arrange for output from Perl's "warn" command to be written to Exim's main
5621 log by default. The user can override this with suitable Perl magic.
5623 77. The use of log_message on a "discard" ACL verb, which is supposed to add to
5624 the log message when discard triggers, was not working for the DATA ACL or
5625 for the non-SMTP ACL.
5627 78. Error message wording change in sieve.c.
5629 79. If smtp_accept_max_per_host was set, the number of connections could be
5630 restricted to fewer than expected, because the daemon was trying to set up
5631 a new connection before checking whether the processes handling previous
5632 connections had finished. The check for completed processes is now done
5633 earlier. On busy systems, this bug wouldn't be noticed because something
5634 else would have woken the daemon, and it would have reaped the completed
5637 80. If a message was submitted locally by a user whose login name contained one
5638 or more spaces (ugh!), the spool file that Exim wrote was not re-readable.
5639 It caused a spool format error. I have fixed the spool reading code. A
5640 related problem was that the "from" clause in the Received: line became
5641 illegal because of the space(s). It is now covered by ${quote_local_part.
5643 81. Included the latest eximstats from Steve (adds average sizes to HTML Top
5646 82. Updated OS/Makefile-AIX as per message from Mike Meredith.
5648 83. Patch from Sieve maintainer to fix unterminated string problem in
5649 "vacation" handling.
5651 84. Some minor changes to the Linux configuration files to help with other
5652 OS variants using glibc.
5654 85. One more patch for Sieve to update vacation handling to latest spec.
5657 ----------------------------------------------------
5658 See the note above about the 4.44 and 4.50 releases.
5659 ----------------------------------------------------
5665 1. Change 4.43/35 introduced a bug that caused file counts to be
5666 incorrectly computed when quota_filecount was set in an appendfile
5669 2. Closing a stable door: arrange to panic-die if setitimer() ever fails. The
5670 bug fixed in 4.43/37 would have been diagnosed quickly if this had been in
5673 3. Give more explanation in the error message when the command for a transport
5674 filter fails to execute.
5676 4. There are several places where Exim runs a non-Exim command in a
5677 subprocess. The SIGUSR1 signal should be disabled for these processes. This
5678 was being done only for the command run by the queryprogram router. It is
5679 now done for all such subprocesses. The other cases are: ${run, transport
5680 filters, and the commands run by the lmtp and pipe transports.
5682 5. Some older OS have a limit of 256 on the maximum number of file
5683 descriptors. Exim was using setrlimit() to set 1000 as a large value
5684 unlikely to be exceeded. Change 4.43/17 caused a lot of logging on these
5685 systems. I've change it so that if it can't get 1000, it tries for 256.
5687 6. "control=submission" was allowed, but had no effect, in a DATA ACL. This
5688 was an oversight, and furthermore, ever since the addition of extra
5689 controls (e.g. 4.43/32), the checks on when to allow different forms of
5690 "control" were broken. There should now be diagnostics for all cases when a
5691 control that does not make sense is encountered.
5693 7. $recipients is now available in the predata ACL (oversight).
5695 8. Tidy the search cache before the fork to do a delivery from a message
5696 received from the command line. Otherwise the child will trigger a lookup
5697 failure and thereby defer the delivery if it tries to use (for example) a
5698 cached ldap connection that the parent has called unbind on.
5700 9. If verify=recipient was followed by verify=sender in a RCPT ACL, the value
5701 of $address_data from the recipient verification was clobbered by the
5702 sender verification.
5704 10. If FIXED_NEVER_USERS was defined, but empty, Exim was assuming the uid 0
5705 was its contents. (It was OK if the option was not defined at all.)
5707 11. A "Completed" log line is now written for messages that are removed from
5708 the spool by the -Mrm option.
5710 12. $host_address is now set to the target address during the checking of
5711 ignore_target_hosts.
5713 13. When checking ignore_target_hosts for an ipliteral router, no host name was
5714 being passed; this would have caused $sender_host_name to have been used if
5715 matching the list had actually called for a host name (not very likely,
5716 since this list is usually IP addresses). A host name is now passed as
5719 14. Changed the calls that set up the SIGCHLD handler in the daemon to use the
5720 code that specifies a non-restarting handler (typically sigaction() in
5721 modern systems) in an attempt to fix a rare and obscure crash bug.
5723 15. Narrowed the window for a race in the daemon that could cause it to ignore
5724 SIGCHLD signals. This is not a major problem, because they are used only to
5725 wake it up if nothing else does.
5727 16. A malformed maildirsize file could cause Exim to calculate negative values
5728 for the mailbox size or file count. Odd effects could occur as a result.
5729 The maildirsize information is now recalculated if the size or filecount
5732 17. Added HAVE_SYS_STATVFS_H to the os.h file for Linux, as it has had this
5733 support for a long time. Removed HAVE_SYS_VFS_H.
5735 18. Updated exipick to current release from John Jetmore.
5737 19. Allow an empty sender to be matched against a lookup in an address list.
5738 Previously the only cases considered were a regular expression, or an
5741 20. Exim went into a mad DNS lookup loop when doing a callout where the
5742 host was specified on the transport, if the DNS lookup yielded more than
5745 21. The RFC2047 encoding function was originally intended for short strings
5746 such as real names; it was not keeping to the 75-character limit for
5747 encoded words that the RFC imposes. It now respects the limit, and
5748 generates multiple encoded words if necessary. To be on the safe side, I
5749 have increased the buffer size for the ${rfc2047: expansion operator from
5752 22. Failure to deliver a bounce message always caused it to be frozen, even if
5753 there was an errors_to setting on the router. The errors_to setting is now
5756 23. If an IPv6 address is given for -bh or -bhc, it is now converted to the
5757 canonical form (fully expanded) before being placed in
5758 $sender_host_address.
5760 24. Updated eximstats to version 1.33
5762 25. Include certificate and key file names in error message when GnuTLS fails
5763 to set them up, because the GnuTLS error message doesn't include the name
5764 of the failing file when there is a problem reading it.
5766 26. Expand error message when OpenSSL has problems setting up cert/key files.
5769 27. Reset the locale to "C" after calling embedded Perl, in case it was changed
5770 (this can affect the format of dates).
5772 28. exim_tidydb, when checking for the continued existence of a message for
5773 which it has found a message-specific retry record, was not finding
5774 messages that were in split spool directories. Consequently, it was
5775 deleting retry records that should have stayed in existence.
5777 29. eximstats updated to version 1.35
5778 1.34 - allow eximstats to parse syslog lines as well as mainlog lines
5779 1.35 - bugfix such that pie charts by volume are generated correctly
5781 30. The SPA authentication driver was not abandoning authentication and moving
5782 on to the next authenticator when an expansion was forced to fail,
5783 contradicting the general specification for all authenticators. Instead it
5784 was generating a temporary error. It now behaves as specified.
5786 31. The default ordering of permitted cipher suites for GnuTLS was pessimal
5787 (the order specifies the preference for clients). The order is now AES256,
5788 AES128, 3DES, ARCFOUR128.
5790 31. Small patch to Sieve code - explicitly set From: when generating an
5793 32. Exim crashed if a remote delivery caused a very long error message to be
5794 recorded - for instance if somebody sent an entire SpamAssassin report back
5795 as a large number of 550 error lines. This bug was coincidentally fixed by
5796 increasing the size of one of Exim's internal buffers (big_buffer) that
5797 happened as part of the Exiscan merge. However, to be on the safe side, I
5798 have made the code more robust (and fixed the comments that describe what
5801 33. Some experimental protocols are using DNS PTR records for new purposes. The
5802 keys for these records are domain names, not reversed IP addresses. The
5803 dnsdb PTR lookup now tests whether its key is an IP address. If not, it
5804 leaves it alone. Component reversal etc. now happens only for IP addresses.
5807 34. The host_aton() function is supposed to be passed a string that is known
5808 to be a valid IP address. However, in the case of IPv6 addresses, it was
5809 not checking this. This is a hostage to fortune. Exim now panics and dies
5810 if the condition is not met. A case was found where this could be provoked
5811 from a dnsdb PTR lookup with an IPv6 address that had more than 8
5812 components; fortuitously, this particular loophole had already been fixed
5813 by change 4.50/55 or 4.44/33 above.
5815 If there are any other similar loopholes, the new check in host_aton()
5816 itself should stop them being exploited. The report I received stated that
5817 data on the command line could provoke the exploit when Exim was running as
5818 exim, but did not say which command line option was involved. All I could
5819 find was the use of -be with a bad dnsdb PTR lookup, and in that case it is
5820 running as the user.
5823 35. There was a buffer overflow vulnerability in the SPA authentication code
5824 (which came originally from the Samba project). I have added a test to the
5825 spa_base64_to_bits() function which I hope fixes it.
5828 36. The daemon start-up calls getloadavg() while still root for those OS that
5829 need the first call to be done as root, but it missed one case: when
5830 deliver_queue_load_max is set with deliver_drop_privilege. This is
5831 necessary for the benefit of the queue runner, because there is no re-exec
5832 when deliver_drop_privilege is set.
5834 37. Caching of lookup data for "hosts =" ACL conditions, when a named host list
5835 was in use, was not putting the data itself into the right store pool;
5836 consequently, it could be overwritten for a subsequent message in the same
5837 SMTP connection. (Fix 4.40/11 dealt with the non-cache case, but overlooked
5840 38. Sometimes the final signoff response after QUIT could fail to get
5841 transmitted in the non-TLS case. Testing !tls_active instead of tls_active
5842 < 0 before doing a fflush(). This bug looks as though it goes back to the
5843 introduction of TLS in release 3.20, but "sometimes" must have been rare
5844 because the tests only now provoked it.
5850 1. Fixed a longstanding but relatively impotent bug: a long time ago, before
5851 PIPELINING, the function smtp_write_command() used to return TRUE or FALSE.
5852 Now it returns an integer. A number of calls were still expecting a T/F
5853 return. Fortuitously, in all cases, the tests worked in OK situations,
5854 which is the norm. However, things would have gone wrong on any write
5855 failures on the smtp file descriptor. This function is used when sending
5856 messages over SMTP and also when doing verify callouts.
5858 2. When Exim is called to do synchronous delivery of a locally submitted
5859 message (the -odf or -odi options), it no longer closes stderr before doing
5862 3. Implemented the mua_wrapper option.
5864 4. Implemented mx_fail_domains and srv_fail_domains for the dnslookup router.
5866 5. Implemented the functions header_remove(), header_testname(),
5867 header_add_at_position(), and receive_remove_recipient(), and exported them
5870 6. If an ACL "warn" statement specified the addition of headers, Exim already
5871 inserted X-ACL-Warn: at the start if there was no header name. However, it
5872 was not making this test for the second and subsequent header lines if
5873 there were newlines in the string. This meant that an invalid header could
5874 be inserted if Exim was badly configured.
5876 7. Allow an ACL "warn" statement to add header lines at the start or after all
5877 the Received: headers, as well as at the end.
5879 8. Added the rcpt_4xx retry error code.
5881 9. Added postmaster_mailfrom=xxx to callout verification option.
5883 10. Added mailfrom=xxxx to the callout verification option, for verify=
5886 11. ${substr_1_:xxxx} and ${substr__3:xxxx} are now diagnosed as syntax errors
5887 (they previously behaved as ${substr_1_0:xxxx} and ${substr:_0_3:xxxx}).
5889 12. Inserted some casts to stop certain compilers warning when using pointer
5890 differences as field lengths or precisions in printf-type calls (mostly
5891 affecting debugging statements).
5893 13. Added optional readline() support for -be (dynamically loaded).
5895 14. Obscure bug fix: if a message error (e.g. 4xx to MAIL) happened within the
5896 same clock tick as a message's arrival, so that its received time was the
5897 same as the "first fail" time on the retry record, and that message
5898 remained on the queue past the ultimate address timeout, every queue runner
5899 would try a delivery (because it was past the ultimate address timeout) but
5900 after another failure, the ultimate address timeout, which should have then
5901 bounced the address, did not kick in. This was a "< instead of <=" error;
5902 in most cases the first failure would have been in the next clock tick
5903 after the received time, and all would be well.
5905 15. The special items beginning with @ in domain lists (e.g. @mx_any) were not
5906 being recognized when the domain list was tested by the match_domain
5907 condition in an expansion string.
5909 16. Added the ${str2b64: operator.
5911 17. Exim was always calling setrlimit() to set a large limit for the number of
5912 processes, without checking whether the existing limit was already
5913 adequate. (It did check for the limit on file descriptors.) Furthermore,
5914 errors from getrlimit() and setrlimit() were being ignored. Now they are
5915 logged to the main and panic logs, but Exim does carry on, to try to do its
5916 job under whatever limits there are.
5918 18. Imported PCRE 5.0.
5920 19. Trivial typo in log message " temporarily refused connection" (the leading
5923 20. If the log selector return_path_on_delivery was set and an address was
5924 redirected to /dev/null, the delivery process crashed because it assumed
5925 that a return path would always be set for a "successful" delivery. In this
5926 case, the whole delivery is bypassed as an optimization, and therefore no
5929 21. Internal re-arrangement: the function for sending a challenge and reading
5930 a response while authentication was assuming a zero-terminated challenge
5931 string. It's now changed to take a pointer and a length, to allow for
5932 binary data in such strings.
5934 22. Added the cyrus_sasl authenticator (code supplied by MBM).
5936 23. Exim was not respecting finduser_retries when seeking the login of the
5937 uid under which it was called; it was always trying 10 times. (The default
5938 setting of finduser_retries is zero.) Also, it was sleeping after the final
5939 failure, which is pointless.
5941 24. Implemented tls_on_connect_ports.
5943 25. Implemented acl_smtp_predata.
5945 26. If the domain in control=submission is set empty, Exim assumes that the
5946 authenticated id is a complete email address when it generates From: or
5947 Sender: header lines.
5949 27. Added "#define SOCKLEN_T int" to OS/os.h-SCO and OS/os.h-SCO_SV. Also added
5950 definitions to OS/Makefile-SCO and OS/Makefile-SCO_SV that put basename,
5951 chown and chgrp in /bin and hostname in /usr/bin.
5953 28. Exim was keeping the "process log" file open after each use, just as it
5954 does for the main log. This opens the possibility of it remaining open for
5955 long periods when the USR1 signal hits a daemon. Occasional processlog
5956 errors were reported, that could have been caused by this. Anyway, it seems
5957 much more sensible not to leave this file open at all, so that is what now
5960 29. The long-running daemon process does not normally write to the log once it
5961 has entered its main loop, and it closes the log before doing so. This is
5962 so that log files can straightforwardly be renamed and moved. However,
5963 there are a couple of unusual error situations where the daemon does write
5964 log entries, and I had neglected to close the log afterwards.
5966 30. The text of an SMTP error response that was received during a remote
5967 delivery was being truncated at 512 bytes. This is too short for some of
5968 the long messages that one sometimes sees. I've increased the limit to
5971 31. It is now possible to make retry rules that apply only when a message has a
5972 specific sender, in particular, an empty sender.
5974 32. Added "control = enforce_sync" and "control = no_enforce_sync". This makes
5975 it possible to be selective about when SMTP synchronization is enforced.
5977 33. Added "control = caseful_local_part" and "control = "caselower_local_part".
5979 32. Implemented hosts_connection_nolog.
5981 33. Added an ACL for QUIT.
5983 34. Setting "delay_warning=" to disable warnings was not working; it gave a
5986 35. Added mailbox_size and mailbox_filecount to appendfile.
5988 36. Added control = no_multiline_responses to ACLs.
5990 37. There was a bug in the logic of the code that waits for the clock to tick
5991 in the case where the clock went backwards by a substantial amount such
5992 that the microsecond fraction of "now" was more than the microsecond
5993 fraction of "then" (but the whole seconds number was less).
5995 38. Added support for the libradius Radius client library this is found on
5996 FreeBSD (previously only the radiusclient library was supported).
6002 1. When certain lookups returned multiple values in the form name=value, the
6003 quoting of the values was not always being done properly. Specifically:
6004 (a) If the value started with a double quote, but contained no whitespace,
6006 (b) If the value contained whitespace other than a space character (i.e.
6007 tabs or newlines or carriage returns) it was not quoted.
6008 This fix has been applied to the mysql and pgsql lookups by writing a
6009 separate quoting function and calling it from the lookup code. The fix
6010 should probably also be applied to nisplus, ibase and oracle lookups, but
6011 since I cannot test any of those, I have not disturbed their existing code.
6013 2. A hit in the callout cache for a specific address caused a log line with no
6014 reason for rejecting RCPT. Now it says "Previous (cached) callout
6015 verification failure".
6017 3. There was an off-by-one bug in the queryprogram router. An over-long
6018 return line was truncated at 256 instead of 255 characters, thereby
6019 overflowing its buffer with the terminating zero. As well as fixing this, I
6020 have increased the buffer size to 1024 (and made a note to document this).
6022 4. If an interrupt, such as the USR1 signal that is send by exiwhat, arrives
6023 when Exim is waiting for an SMTP response from a remote server, Exim
6024 restarts its select() call on the socket, thereby resetting its timeout.
6025 This is not a problem when such interrupts are rare. Somebody set up a cron
6026 job to run exiwhat every 2 minutes, which is less than the normal select()
6027 timeout (5 or 10 minutes). This meant that the select() timeout never
6028 kicked in because it was always reset. I have fixed this by comparing the
6029 time when an interrupt arrives with the time at the start of the first call
6030 to select(). If more time than the timeout has elapsed, the interrupt is
6031 treated as a timeout.
6033 5. Some internal re-factoring in preparation for the addition of Sieve
6034 extensions (by MH). In particular, the "personal" test is moved to a
6035 separate function, and given an option for scanning Cc: and Bcc: (which is
6036 not set for Exim filters).
6038 6. When Exim created an email address using the login of the caller as the
6039 local part (e.g. when creating a From: or Sender: header line), it was not
6040 quoting the local part when it contained special characters such as @.
6042 7. Installed new OpenBSD configuration files.
6044 8. Reworded some messages for syntax errors in "and" and "or" conditions to
6045 try to make them clearer.
6047 9. Callout options, other than the timeout value, were being ignored when
6048 verifying sender addresses in header lines. For example, when using
6050 verify = header_sender/callout=no_cache
6052 the cache was (incorrectly) being used.
6054 10. Added a missing instance of ${EXE} to the exim_install script; this affects
6055 only the Cygwin environment.
6057 11. When return_path_on_delivery was set as a log selector, if different remote
6058 addresses in the same message used different return paths and parallel
6059 remote delivery occurred, the wrong values would sometimes be logged.
6060 (Whenever a remote delivery process finished, the return path value from
6061 the most recently started remote delivery process was logged.)
6063 12. RFC 3848 specifies standard names for the "with" phrase in Received: header
6064 lines when AUTH and/or TLS are in use. This is the "received protocol"
6065 field. Exim used to use "asmtp" for authenticated SMTP, without any
6066 indication (in the protocol name) for TLS use. Now it follows the RFC and
6067 uses "esmtpa" if the connection is authenticated, "esmtps" if it is
6068 encrypted, and "esmtpsa" if it is both encrypted and authenticated. These
6069 names appear in log lines as well as in Received: header lines.
6071 13. Installed MH's patches for Sieve to add the "copy" and "vacation"
6072 extensions, and comparison tests, and to fix some bugs.
6074 14. Changes to the "personal" filter test:
6076 (1) The test was buggy in that it was just doing the equivalent of
6077 "contains" tests on header lines. For example, if a user's address was
6078 anne@some.where, the "personal" test would incorrectly be true for
6080 To: susanne@some.where
6082 This test is now done by extracting each address from the header in turn,
6083 and checking the entire address. Other tests that are part of "personal"
6084 are now done using regular expressions (for example, to check local parts
6085 of addresses in From: header lines).
6087 (2) The list of non-personal local parts in From: addresses has been
6088 extended to include "listserv", "majordomo", "*-request", and "owner-*",
6089 taken from the Sieve specification recommendations.
6091 (3) If the message contains any header line starting with "List-" it is
6092 treated as non-personal.
6094 (4) The test for "circular" in the Subject: header line has been removed
6095 because it now seems ill-conceived.
6097 15. Minor typos in src/EDITME comments corrected.
6099 16. Installed latest exipick from John Jetmore.
6101 17. If headers_add on a router specified a text string that was too long for
6102 string_sprintf() - that is, longer than 8192 bytes - Exim panicked. The use
6103 of string_sprintf() is now avoided.
6105 18. $message_body_size was not set (it was always zero) when running the DATA
6106 ACL and the local_scan() function.
6108 19. For the "mail" command in an Exim filter, no default was being set for
6109 the once_repeat time, causing a random time value to be used if "once" was
6110 specified. (If the value happened to be <= 0, no repeat happened.) The
6111 default is now 0s, meaning "never repeat". The "vacation" command was OK
6112 (its default is 7d). It's somewhat surprising nobody ever noticed this bug
6113 (I found it when inspecting the code).
6115 20. There is now an overall timeout for performing a callout verification. It
6116 defaults to 4 times the callout timeout, which applies to individual SMTP
6117 commands during the callout. The overall timeout applies when there is more
6118 than one host that can be tried. The timeout is checked before trying the
6119 next host. This prevents very long delays if there are a large number of
6120 hosts and all are timing out (e.g. when the network connections are timing
6121 out). The value of the overall timeout can be changed by specifying an
6122 additional sub-option for "callout", called "maxwait". For example:
6124 verify = sender/callout=5s,maxwait=20s
6126 21. Add O_APPEND to the open() call for maildirsize files (Exim already seeks
6127 to the end before writing, but this should make it even safer).
6129 22. Exim was forgetting that it had advertised PIPELINING for the second and
6130 subsequent messages on an SMTP connection. It was also not resetting its
6131 memory on STARTTLS and an internal HELO.
6133 23. When Exim logs an SMTP synchronization error within a session, it now
6134 records whether PIPELINING has been advertised or not.
6136 24. Added 3 instances of "(long int)" casts to time_t variables that were being
6137 formatted using %ld, because on OpenBSD (and perhaps others), time_t is int
6138 rather than long int.
6140 25. Installed the latest Cygwin configuration files from the Cygwin maintainer.
6142 26. Added the never_mail option to autoreply.
6148 1. A reorganization of the code in order to implement 4.40/8 caused a daemon
6149 crash if the getsockname() call failed; this can happen if a connection is
6150 closed very soon after it is established. The problem was simply in the
6151 order in which certain operations were done, causing Exim to try to write
6152 to the SMTP stream before it had set up the file descriptor. The bug has
6153 been fixed by making things happen in the correct order.
6159 1. If "drop" was used in a DATA ACL, the SMTP output buffer was not flushed
6160 before the connection was closed, thus losing the rejection response.
6162 2. Commented out the definition of SOCKLEN_T in os.h-SunOS5. It is needed for
6163 some early Solaris releases, but causes trouble in current releases where
6164 socklen_t is defined.
6166 3. When std{in,out,err} are closed, re-open them to /dev/null so that they
6169 4. Minor refactoring of os.c-Linux to avoid compiler warning when IPv6 is not
6172 5. Refactoring in expand.c to improve memory usage. Pre-allocate a block so
6173 that releasing the top of it at the end releases what was used for sub-
6174 expansions (unless the block got too big). However, discard this block if
6175 the first thing is a variable or header, so that we can use its block when
6176 it is dynamic (useful for very large $message_headers, for example).
6178 6. Lookups now cache *every* query, not just the most recent. A new, separate
6179 store pool is used for this. It can be recovered when all lookup caches are
6180 flushed. Lookups now release memory at the end of their result strings.
6181 This has involved some general refactoring of the lookup sources.
6183 7. Some code has been added to the store_xxx() functions to reduce the amount
6184 of flapping under certain conditions.
6186 8. log_incoming_interface used to affect only the <= reception log lines. Now
6187 it causes the local interface and port to be added to several more SMTP log
6188 lines, for example "SMTP connection from", and rejection lines.
6190 9. The Sieve author supplied some patches for the doc/README.SIEVE file.
6192 10. Added a conditional definition of _BSD_SOCKLEN_T to os.h-Darwin.
6194 11. If $host_data was set by virtue of a hosts lookup in an ACL, its value
6195 could be overwritten at the end of the current message (or the start of a
6196 new message if it was set in a HELO ACL). The value is now preserved for
6197 the duration of the SMTP connection.
6199 12. If a transport had a headers_rewrite setting, and a matching header line
6200 contained an unqualified address, that address was qualified, even if it
6201 did not match any rewriting rules. The underlying bug was that the values
6202 of the flags that permit the existence of unqualified sender and recipient
6203 addresses in header lines (set by {sender,recipient}_unqualified_hosts for
6204 non-local messages, and by -bnq for local messages) were not being
6205 preserved with the message after it was received.
6207 13. When Exim was logging an SMTP synchronization error, it could sometimes log
6208 "next input=" as part of the text comprising the host identity instead of
6209 the correct text. The code was using the same buffer for two different
6210 strings. However, depending on which order the printing function evaluated
6211 its arguments, the bug did not always show up. Under Linux, for example, my
6212 test suite worked just fine.
6214 14. Exigrep contained a use of Perl's "our" scoping after change 4.31/70. This
6215 doesn't work with some older versions of Perl. It has been changed to "my",
6216 which in any case is probably the better facility to use.
6218 15. A really picky compiler found some instances of statements for creating
6219 error messages that either had too many or two few arguments for the format
6222 16. The size of the buffer for calls to the DNS resolver has been increased
6223 from 1024 to 2048. A larger buffer is needed when performing PTR lookups
6224 for addresses that have a lot of PTR records. This alleviates a problem; it
6225 does not fully solve it.
6227 17. A dnsdb lookup for PTR records that receives more data than will fit in the
6228 buffer now truncates the list and logs the incident, which is the same
6229 action as happens when Exim is looking up a host name and its aliases.
6230 Previously in this situation something unpredictable would happen;
6231 sometimes it was "internal error: store_reset failed".
6233 18. If a server dropped the connection unexpectedly when an Exim client was
6234 using GnuTLS and trying to read a response, the client delivery process
6235 crashed while trying to generate an error log message.
6237 19. If a "warn" verb in an ACL added multiple headers to a message in a single
6238 string, for example:
6240 warn message = H1: something\nH2: something
6242 the text was added as a single header line from Exim's point of view
6243 though it ended up OK in the delivered message. However, searching for the
6244 second and subsequent header lines using $h_h2: did not work. This has been
6245 fixed. Similarly, if a system filter added multiple headers in this way,
6246 the routers could not see them.
6248 20. Expanded the error message when iplsearch is called with an invalid key to
6249 suggest using net-iplsearch in a host list.
6251 21. When running tests using -bh, any delays imposed by "delay" modifiers in
6252 ACLs are no longer actually imposed (and a message to that effect is
6255 22. If a "gecos" field in a passwd entry contained escaped characters, in
6256 particular, if it contained a \" sequence, Exim got it wrong when building
6257 a From: or a Sender: header from that name. A second bug also caused
6258 incorrect handling when an unquoted " was present following a character
6259 that needed quoting.
6261 23. "{crypt}" as a password encryption mechanism for a "crypteq" expansion item
6262 was not being matched caselessly.
6264 24. Arranged for all hyphens in the exim.8 source to be escaped with
6267 25. Change 16 of 4.32, which reversed 71 or 4.31 didn't quite do the job
6268 properly. Recipient callout cache records were still being keyed to include
6269 the sender, even when use_sender was set false. This led to far more
6270 callouts that were necessary. The sender is no longer included in the key
6271 when use_sender is false.
6273 26. Added "control = submission" modifier to ACLs.
6275 27. Added the ${base62d: operator to decode base 62 numbers.
6277 28. dnsdb lookups can now access SRV records.
6279 29. CONFIGURE_OWNER can be set at build time to define an alternative owner for
6280 the configuration file.
6282 30. The debug message "delivering xxxxxx-xxxxxx-xx" is now output in verbose
6283 (-v) mode. This makes the output for a verbose queue run more intelligible.
6285 31. Added a use_postmaster feature to recipient callouts.
6287 32. Added the $body_zerocount variable, containing the number of binary zero
6288 bytes in the message body.
6290 33. The time of last modification of the "new" subdirectory is now used as the
6291 "mailbox time last read" when there is a quota error for a maildir
6294 34. Added string comparison operators lt, lti, le, lei, gt, gti, ge, gei.
6296 35. Added +ignore_unknown as a special item in host lists.
6298 36. Code for decoding IPv6 addresses in host lists is now included, even if
6299 IPv6 support is not being compiled. This fixes a bug in which an IPv6
6300 address was recognized as an IP address, but was then not correctly decoded
6301 into binary, causing unexpected and incorrect effects when compared with
6308 1. Very minor rewording of debugging text in manualroute to say "list of
6309 hosts" instead of "hostlist".
6311 2. If verify=header_syntax was set, and a header line with an unqualified
6312 address (no domain) and a large number of spaces between the end of the
6313 name and the colon was received, the reception process suffered a buffer
6314 overflow, and (when I tested it) crashed. This was caused by some obsolete
6315 code that should have been removed. The fix is to remove it!
6317 3. When running in the test harness, delay a bit after writing a bounce
6318 message to get a bit more predictability in the log output.
6320 4. Added a call to search_tidyup() just before forking a reception process. In
6321 theory, someone could use a lookup in the expansion of smtp_accept_max_
6322 per_host which, without the tidyup, could leave open a database connection.
6324 5. Added the variables $recipient_data and $sender_data which get set from a
6325 lookup success in an ACL "recipients" or "senders" condition, or a router
6326 "senders" option, similar to $domain_data and $local_part_data.
6328 6. Moved the writing of debug_print from before to after the "senders" test
6331 7. Change 4.31/66 (moving the time when the Received: is generated) caused
6332 problems for message scanning, either using a data ACL, or using
6333 local_scan() because the Received: header was not generated till after they
6334 were called (in order to set the time as the time of reception completion).
6335 I have revised the way this works. The header is now generated after the
6336 body is received, but before the ACL or local_scan() are called. After they
6337 are run, the timestamp in the header is updated.
6343 1. Change 4.24/6 introduced a bug because the SIGALRM handler was disabled
6344 before starting a queue runner without re-exec. This happened only when
6345 deliver_drop_privilege was set or when the Exim user was set to root. The
6346 effect of the bug was that timeouts during subsequent deliveries caused
6347 crashes instead of being properly handled. The handler is now left at its
6348 default (and expected) setting.
6350 2. The other case in which a daemon avoids a re-exec is to deliver an incoming
6351 message, again when deliver_drop_privilege is set or Exim is run as root.
6352 The bug described in (1) was not present in this case, but the tidying up
6353 of the other signals was missing. I have made the two cases consistent.
6355 3. The ignore_target_hosts setting on a manualroute router was being ignored
6356 for hosts that were looked up using the /MX notation.
6358 4. Added /ignore=<ip list> feature to @mx_any, @mx_primary, and @mx_secondary
6361 5. Change 4.31/55 was buggy, and broke when there was a rewriting rule that
6362 operated on the sender address. After changing the $sender_address to <>
6363 for the sender address verify, Exim was re-instated it as the original
6364 (before rewriting) address, but remembering that it had rewritten it, so it
6365 wasn't rewriting it again. This bug also had the effect of breaking the
6366 sender address verification caching when the sender address was rewritten.
6368 6. The ignore_target_hosts option was being ignored by the ipliteral router.
6369 This has been changed so that if the ip literal address matches
6370 ignore_target_hosts, the router declines.
6372 7. Added expansion conditions match_domain, match_address, and match_local_
6373 part (NOT match_host).
6375 8. The placeholder for the Received: header didn't have a length field set.
6377 9. Added code to Exim itself and to exim_lock to test for a specific race
6378 condition that could lead to file corruption when using MBX delivery. The
6379 issue is with the lockfile that is created in /tmp. If this file is removed
6380 after a process has opened it but before that process has acquired a lock,
6381 there is the potential for a second process to recreate the file and also
6382 acquire a lock. This could lead to two Exim processes writing to the file
6383 at the same time. The added code performs the same test as UW imapd; it
6384 checks after acquiring the lock that its file descriptor still refers to
6385 the same named file.
6387 10. The buffer for building added header lines was of fixed size, 8192 bytes.
6388 It is now parameterized by HEADER_ADD_BUFFER_SIZE and this can be adjusted
6391 11. Added the smtp_active_hostname option. If used, this will typically be made
6392 to depend on the incoming interface address. Because $interface_address is
6393 not set up until the daemon has forked a reception process, error responses
6394 that can happen earlier (such as "too many connections") no longer contain
6397 12. If an expansion in a condition on a "warn" statement fails because a lookup
6398 defers, the "warn" statement is abandoned, and the next ACL statement is
6399 processed. Previously this caused the whole ACL to be aborted.
6401 13. Added the iplsearch lookup type.
6403 14. Added ident_timeout as a log selector.
6405 15. Added tls_certificate_verified as a log selector.
6407 16. Added a global option tls_require_ciphers (compare the smtp transport
6408 option of the same name). This controls incoming TLS connections.
6410 17. I finally figured out how to make tls_require_ciphers do a similar thing
6411 in GNUtls to what it does in OpenSSL, that is, set up an appropriate list
6412 before starting the TLS session.
6414 18. Tabs are now shown as \t in -bP output.
6416 19. If the log selector return_path_on_delivery was set, Exim crashed when
6417 bouncing a message because it had too many Received: header lines.
6419 20. If two routers both had headers_remove settings, and the first one included
6420 a superfluous trailing colon, the final name in the first list and the
6421 first name in the second list were incorrectly joined into one item (with a
6422 colon in the middle).
6428 1. Added -C and -D options to the exinext utility, mainly to make it easier
6429 to include in the automated testing, but these could be helpful when
6430 multiple configurations are in use.
6432 2. The exinext utility was not formatting the output nicely when there was
6433 an alternate port involved in the retry record key, nor when there was a
6434 message id as well (for retries that were specific to a specific message
6435 and a specific host). It was also confused by IPv6 addresses, because of
6436 the additional colons they contain. I have fixed the IPv4 problem, and
6437 patched it up to do a reasonable job for IPv6.
6439 3. When there is an error after a MAIL, RCPT, or DATA SMTP command during
6440 delivery, the log line now contains "pipelined" if PIPELINING was used.
6442 4. An SMTP transport process used to panic and die if the bind() call to set
6443 an explicit outgoing interface failed. This has been changed; it is now
6444 treated in the same way as a connect() failure.
6446 5. A reference to $sender_host_name in the part of a conditional expansion
6447 that was being skipped was still causing a DNS lookup. This no longer
6450 6. The def: expansion condition was not recognizing references to header lines
6451 that used bh_ and bheader_.
6453 7. Added the _cache feature to named lists.
6455 8. The code for checking quota_filecount in the appendfile transport was
6456 allowing one more file than it should have been.
6458 9. For compatibility with Sendmail, the command line option
6466 and sets the incoming protocol and host name (for trusted callers). The
6467 host name and its colon can be omitted when only the protocol is to be set.
6468 Note the Exim already has two private options, -pd and -ps, that refer to
6469 embedded Perl. It is therefore impossible to set a protocol value of "d" or
6470 "s", but I don't think that's a major issue.
6472 10. A number of refactoring changes to the code, none of which should affect
6475 (a) The number of logging options was getting close to filling up the
6476 32-bit word that was used as a bit map. I have split them into two classes:
6477 those that are passed in the argument to log_write(), and those that are
6478 only ever tested independently outside of that function. These are now in
6479 separate 32-bit words, so there is plenty of room for expansion again.
6480 There is no change in the user interface or the logging behaviour.
6482 (b) When building, for example, log lines, the code previously used a
6483 macro that called string_cat() twice, in order to add two strings. This is
6484 not really sufficiently general. Furthermore, there was one instance where
6485 it was actually wrong because one of the argument was used twice, and in
6486 one call a function was used. (As it happened, calling the function twice
6487 did not affect the overall behaviour.) The macro has been replaced by a
6488 function that can join an arbitrary number of extra strings onto a growing
6491 (c) The code for expansion conditions now uses a table and a binary chop
6492 instead of a serial search (which was left over from when there were very
6493 few conditions). Also, it now recognizes conditions like "pam" even when
6494 the relevant support is not compiled in: a suitably worded error message is
6495 given if an attempt is made to use such a condition.
6497 11. Added ${time_interval:xxxxx}.
6499 12. A bug was causing one of the ddress fields not to be passed back correctly
6500 from remote delivery subprocesses. The field in question was not being
6501 subsequently used, so this caused to problems in practice.
6503 13. Added new log selectors queue_time and deliver_time.
6505 14. Might have fixed a bug in maildirsizefile handling that threw up
6506 "unexpected character" debug warnings, and recalculated the data
6507 unnecessarily. In any case, I expanded the warning message to give more
6510 15. Added the message "Restricted characters in address" to the statements in
6511 the default ACL that block characters like @ and % in local parts.
6513 16. Change 71 for release 4.31 proved to be much less benign that I imagined.
6514 Three changes have been made:
6516 (a) There was a serious bug; a negative response to MAIL caused the whole
6517 recipient domain to be cached as invalid, thereby blocking all messages
6518 to all local parts at the same domain, from all senders. This bug has
6519 been fixed. The domain is no longer cached after a negative response to
6520 MAIL if the sender used is not empty.
6522 (b) The default behaviour of using MAIL FROM:<> for recipient callouts has
6525 (c) A new callout option, "use_sender" has been added for people who want
6526 the modified behaviour.
6532 1. Removed "EXTRALIBS=-lwrap" from OS/Makefile-Unixware7 on the advice of
6535 2. Removed "LIBS = -lresolv" from OS/Makefile-Darwin as it is not needed, and
6536 indeed breaks things for older releases.
6538 3. Added additional logging to the case where there is a problem reading data
6539 from a filter that is running in a subprocess using a pipe, in order to
6540 try to track down a specific problem.
6542 4. Testing facility fudge: when running in the test harness and attempting
6543 to connect to 10.x.x.x (expecting a connection timeout) I'm now sometimes
6544 getting "No route to host". Convert this to a timeout.
6546 5. Define ICONV_ARG2_TYPE as "char **" for Unixware7 to avoid compiler
6549 6. Some OS don't have socklen_t but use size_t instead. This affects the
6550 fifth argument of getsockopt() amongst other things. This is now
6551 configurable by a macro called SOCKLEN_T which defaults to socklen_t, but
6552 can be set for individual OS. I have set it for SunOS5, OSF1, and
6553 Unixware7. Current versions of SunOS5 (aka Solaris) do have socklen_t, but
6554 some earlier ones do not.
6556 7. Change 4.30/15 was not doing the test caselessly.
6558 8. The standard form for an IPv6 address literal was being rejected by address
6559 parsing in, for example, MAIL and RCPT commands. An example of this kind of
6560 address is [IPv6:2002:c1ed:8229:10:202:2dff:fe07:a42a]. Exim now accepts
6561 this, as well as the form without the "IPv6" on the front (but only when
6562 address literals are enabled, of course).
6564 9. Added some casts to avoid compiler warnings in OS/os.c-Linux.
6566 10. Exim crashed if a message with an empty sender address specified by -f
6567 encountered a router with an errors_to setting. This could be provoked only
6568 by a command such as
6572 where an empty string was supplied; "<>" did not hit this bug.
6574 11. Installed PCRE release 4.5.
6576 12. If EHLO/HELO was rejected by an ACL, the value of $sender_helo_name
6577 remained set. It is now erased.
6579 13. exiqgrep wasn't working on MacOS X because it didn't correctly compute
6580 times from message ids (which are base 36 rather than the normal 62).
6582 14. "Expected" SMTP protocol errors that can arise when PIPELINING is in use
6583 were being counted as actual protocol errors, and logged if the log
6584 selector +smtp_protocol_error was set. One cannot be perfect in this test,
6585 but now, if PIPELINING has been advertised, RCPT following a rejected MAIL,
6586 and DATA following a set of rejected RCPTs do not count as protocol errors.
6587 In other words, Exim assumes they were pipelined, though this may not
6588 actually be the case. Of course, in all cases the client gets an
6589 appropriate error code.
6591 15. If a lookup fails in an ACL condition, a message about the failure may
6592 be available; it is used if testing the ACL cannot continue, because most
6593 such messages specify what the cause of the deferral is. However, some
6594 messages (e.g. "MYSQL: no data found") do not cause a defer. There was bug
6595 that caused an old message to be retained and used if a later statement
6596 caused a defer, replacing the real cause of the deferral.
6598 16. If an IP address had so many PTR records that the DNS lookup buffer
6599 was not large enough to hold them, Exim could crash while trying to process
6600 the truncated data. It now detects and logs this case.
6602 17. Further to 4.21/58, another change has been made: if (and only if) the
6603 first line of a message (the first header line) ends with CRLF, a bare LF
6604 in a subsequent header line has a space inserted after it, so as not to
6605 terminate the header.
6607 18. Refactoring: tidied an ugly bit of code in appendfile that copied data
6608 unnecessarily, used atoi() instead of strtol(), and didn't check the
6609 termination when getting file sizes from file names by regex.
6611 19. Completely re-implemented the support for maildirsize files, in the light
6612 of a number of problems with the previous contributed implementation
6613 (4.30/29). In particular:
6615 . If the quota is zero, the maildirsize file is maintained, but no quota is
6618 . If the maildir directory does not exist, it is created before any attempt
6619 to write a maildirsize file.
6621 . The quota value in the file is just a cache; if the quota is changed in
6622 the transport, the new value overrides.
6624 . A regular expression is available for excluding directories from the
6627 20. The autoreply transport checks the characters in options that define the
6628 message's headers; it allows continued headers, but it was checking with
6629 isspace() after an embedded newline instead of explicitly looking for a
6632 21. If all the "regular" hosts to which an address was routed had passed their
6633 expiry times, and had not reached their retry times, the address was
6634 bounced, even if fallback hosts were defined. Now Exim should go on to try
6637 22. Increased buffer sizes in the callout code from 1024 to 4096 to match the
6638 equivalent code in the SMTP transport. Some hosts send humungous responses
6639 to HELO/EHLO, more than 1024 it seems.
6641 23. Refactoring: code in filter.c used (void *) for "any old type" but this
6642 gives compiler warnings in some environments. I've now done it "properly",
6645 24. The replacement for inet_ntoa() that is used with gcc on IRIX systems
6646 (because of problems with the built-in one) was declared to return uschar *
6647 instead of char *, causing compiler failure.
6649 25. Fixed a file descriptor leak when processing alias/forward files.
6651 26. Fixed a minor format string issue in dbfn.c.
6653 27. Typo in exim.c: ("dmbnz" for "dbmnz").
6655 28. If a filter file refered to $h_xxx or $message_headers, and the headers
6656 contained RFC 2047 "words", Exim's memory could, under certain conditions,
6659 29. When a sender address is verified, it is cached, to save repeating the test
6660 when there is more than one recipient in a message. However, when the
6661 verification involves a callout, it is possible for different callout
6662 options to be set for different recipients. It is too complicated to keep
6663 track of this in the cache, so now Exim always runs a verification when a
6664 callout is required, relying on the callout cache for the optimization.
6665 The overhead is duplication of the address routing, but this should not be
6668 30. Fixed a bug in callout caching. If a RCPT command caused the sender address
6669 to be verified with callout=postmaster, and the main callout worked but the
6670 postmaster check failed, the verification correctly failed. However, if a
6671 subsequent RCPT command asked for sender verification *without* the
6672 postmaster check, incorrect caching caused this verification also to fail,
6675 31. Exim caches DNS lookup failures so as to avoid multiple timeouts; however,
6676 it was not caching the DNS options (qualify_single, search_parents) that
6677 were used when the lookup failed. A subsequent lookup with different
6678 options therefore always gave the same answer, though there were cases
6679 where it should not have. (Example: a "domains = !$mx_any" option on a
6680 dnslookup router: the "domains" option is always processed without any
6681 widening, but the router might have qualify_single set.) Now Exim uses the
6682 cached value only when the same options are set.
6684 32. Added John Jetmore's "exipick" utility to the distribution.
6686 33. GnuTLS: When an attempt to start a TLS session fails for any reason other
6687 than a timeout (e.g. a certificate is required, and is not provided), an
6688 Exim server now closes the connection immediately. Previously it waited for
6689 the client to close - but if the client is SSL, it seems that they each
6690 wait for each other, leading to a delay before one of them times out.
6692 34: GnuTLS: Updated the code to use the new GnuTLS 1.0.0 API. I have not
6693 maintained 0.8.x compatibility because I don't think many are using it, and
6694 it is clearly obsolete.
6696 35. Added TLS support for CRLs: a tls_crl global option and one for the smtp
6699 36. OpenSSL: $tls_certificate_verified was being set to 1 even if the
6700 client certificate was expired. A simple patch fixes this, though I don't
6701 understand the full logic of why the verify callback is called multiple
6704 37. OpenSSL: a patch from Robert Roselius: "Enable client-bug workaround.
6705 Versions of OpenSSL as of 0.9.6d include a 'CBC countermeasure' feature,
6706 which causes problems with some clients (such as the Certicom SSL Plus
6707 library used by Eudora). This option, SSL_OP_DONT_INSERT_EMPTY_FRAGMENTS,
6708 disables the coutermeasure allowing Eudora to connect."
6710 38. Exim was not checking that a write() to a log file succeeded. This could
6711 lead to Bad Things if a log got too big, in particular if it hit a file
6712 size limit. Exim now panics and dies if it cannot write to a log file, just
6713 as it does if it cannot open a log file.
6715 39. Modified OS/Makefile-Linux so that it now contains
6717 CFLAGS=-O -D_FILE_OFFSET_BITS=64 -D_LARGEFILE_SOURCE
6719 The two -D definitions ensure that Exim is compiled with large file
6720 support, which makes it possible to handle log files that are bigger than
6723 40. Fixed a subtle caching bug: if (in an ACL or a set of routers, for
6724 instance) a domain was checked against a named list that involved a lookup,
6725 causing $domain_data to be set, then another domain was checked against the
6726 same list, then the first domain was re-checked, the value of $domain_data
6727 after the final check could be wrong. In particular, if the second check
6728 failed, it could be set empty. This bug probably also applied to
6731 41. The strip_trailing_dot option was not being applied to the address given
6732 with the -f command-line option.
6734 42. The code for reading a message's header from the spool was incrementing
6735 $received_count, but never initializing it. This meant that the value was
6736 incorrect (doubled) while delivering a message in the same process in which
6737 it was received. In the most common configuration of Exim, this never
6738 happens - a fresh exec is done - but it can happen when
6739 deliver_drop_privilege is set.
6741 43. When Exim logs an SMTP synchronization error - client data sent too soon -
6742 it now includes up to 150 characters of the unexpected data in the log
6745 44. The exim_dbmbuild utility uses fixed size buffers for reading input lines
6746 and building data strings. The size of both of these buffers was 10 000
6747 bytes - far larger than anybody would *ever* want, thought I. Needless to
6748 say, somebody hit the limit. I have increased the maximum line length to
6749 20 000 and the maximum data length of concatenated lines to 100 000. I have
6750 also fixed two bugs, because there was no checking on these buffers. Tsk,
6751 tsk. Now exim_dbmbuild gives a message and exits with an error code if a
6752 buffer is too small.
6754 45. The exim_dbmbuild utility did not support quoted keys, as Exim does in
6755 lsearch lookups. Now it does.
6757 46. When parsing a route_list item in a manualroute router, a fixed-length
6758 buffer was used for the list of hosts. I made this 1024 bytes long,
6759 thinking that nobody would ever have a list of hosts that long. Wrong.
6760 Somebody had a whole pile of complicated expansion conditions, and the
6761 string was silently truncated, leading to an expansion error. It turns out
6762 that it is easier to change to an unlimited length (owing to other changes
6763 that have happened since this code was originally written) than to build
6764 structure for giving a limitation error. The length of the item that
6765 expands into the list of hosts is now unlimited.
6767 47. The lsearch lookup could not handle data where the length of text line was
6768 more than 4095 characters. Such lines were truncated, leading to shortened
6769 data being returned. It should now handle lines of any length.
6771 48. Minor wording revision: "cannot test xxx in yyy ACL" becomes "cannot test
6772 xxx condition in yyy ACL" (e.g. "cannot test domains condition in DATA
6775 49. Cosmetic tidy to scripts like exicyclog that are generated by globally
6776 replacing strings such as BIN_DIRECTORY in a source file: the replacement
6777 no longer happens in comment lines. A list of replacements is now placed
6778 at the head of all of the source files, except those whose only change is
6779 to replace PERL_COMMAND in the very first #! line.
6781 50. Replaced the slow insertion sort in queue.c, for sorting the list of
6782 messages on the queue, with a bottom-up merge sort, using code contributed
6783 by Michael Haardt. This should make operations like -bp somewhat faster on
6784 large queues. It won't affect queue runners, except when queue_run_in_order
6787 51. Installed eximstats 1.31 in the distribution.
6789 52. Added support for SRV lookups to the dnslookup router.
6791 53. If an ACL referred to $message_body or $message_body_end, the value was not
6792 reset for any messages that followed in the same SMTP session.
6794 54. The store-handling optimization for building very long strings was not
6795 differentiating between the different store pools. I don't think this
6796 actually made any difference in practice, but I've tidied it.
6798 55. While running the routers to verify a sender address, $sender_address
6799 was still set to the sender address. This is wrong, because when routing to
6800 send a bounce to the sender, it would be empty. Therefore, I have changed
6801 it so that, while verifying a sender address, $sender_address is set to <>.
6802 (There is no change to what happens when verifying a recipient address.)
6804 56. After finding MX (or SRV) records, Exim was doing a DNS lookup for the
6805 target A or AAAA records (if not already returned) without resetting the
6806 qualify_single or search_parents options of the DNS resolver. These are
6807 inappropriate in this case because the targets of MX and SRV records must
6808 be FQDNs. A broken DNS record could cause trouble if it happened to have a
6809 target that, when qualified, matched something in the local domain. These
6810 two options are now turned off when doing these lookups.
6812 57. It seems that at least some releases of Reiserfs (which does not have the
6813 concept of a fixed number of inodes) returns zero and not -1 for the
6814 number of available inodes. This interacted badly with check_spool_inodes,
6815 which assumed that -1 was the "no such thing" setting. What I have done is
6816 to check that the total number of inodes is greater than zero before doing
6817 the test of how many are available.
6819 58. When a "warn" ACL statement has a log_message modifier, the message is
6820 remembered, and not repeated. This is to avoid a lot of repetition when a
6821 message has many recipients that cause the same warning to be written.
6822 However, Exim was preserving the list of already written lines for an
6823 entire SMTP session, which doesn't seem right. The memory is now reset if a
6824 new message is started.
6826 59. The "rewrite" debugging flag was not showing the result of rewriting in the
6827 debugging output unless log_rewrite was also set.
6829 60. Avoid a compiler warning on 64-bit systems in dsearch.c by avoiding the use
6830 of (int)(handle) when we know that handle contains (void *)(-1).
6832 61. The Exim daemon panic-logs an error return when it closes the incoming
6833 connection. However "connection reset by peer" seems to be common, and
6834 isn't really an error worthy of noting specially, so that particular error
6837 62. When Exim is trying to find all the local interfaces, it used to panic and
6838 die if the ioctl to get the interface flags failed. However, it seems that
6839 on at least one OS (Solaris 9) it is possible to have an interface that is
6840 included in the list of interfaces, but for which you get a failure error
6841 for this call. This happens when the interface is not "plumbed" into a
6842 protocol (i.e. neither IPv4 nor IPv6). I've changed the code so that a
6843 failure of the "get flags" call assumes that the interface is down.
6845 63. Added a ${eval10: operator, which assumes all numbers are decimal. This
6846 makes life easier for people who are doing arithmetic on fields extracted
6847 from dates, where you often get leading zeros that should not be
6848 interpreted as octal.
6850 64. Added qualify_domain to the redirect router, to override the global
6853 65. If a pathologically long header line contained very many addresses (the
6854 report of this problem mentioned 10 000) and each of them was rewritten,
6855 Exim could use up a very large amount of memory. (It kept on making new
6856 copies of the header line as it rewrote, and never released the old ones.)
6857 At the expense of a bit more processing, the header rewriting function has
6858 been changed so that it no longer eats memory in this way.
6860 66. The generation of the Received: header has been moved from the time that a
6861 message starts to be received, to the time that it finishes. The timestamp
6862 in the Received: header should now be very close to that of the <= log
6863 line. There are two side-effects of this change:
6865 (a) If a message is rejected by a DATA or non-SMTP ACL or local_scan(), the
6866 logged header lines no longer include the local Received: line, because
6867 it has not yet been created. The same applies to a copy of the message
6868 that is returned to a non-SMTP sender when a message is rejected.
6870 (b) When a filter file is tested using -bf, no additional Received: header
6871 is added to the test message. After some thought, I decided that this
6874 This change does not affect the value of $received_for. It is still set
6875 after address rewriting, but before local_scan() is called.
6877 67. Installed the latest Cygwin-specific files from the Cygwin maintainer.
6879 68. GnuTLS: If an empty file is specified for tls_verify_certificates, GnuTLS
6880 gave an unhelpful panic error message, and a defer error. I have managed to
6881 change this behaviour so that it now rejects any supplied certificate,
6882 which seems right, as the list of acceptable certificates is empty.
6884 69. OpenSSL: If an empty file is specified for tls_verify_certificates, OpenSSL
6885 gave an unhelpful defer error. I have not managed to make this reject any
6886 supplied certificates, but the error message it gives is "no certificate
6887 supplied", which is not helpful.
6889 70. exigrep's output now also includes lines that are not associated with any
6890 message, but which match the given pattern. Implemented by a patch from
6891 Martin Sluka, which also tidied up the Perl a bit.
6893 71. Recipient callout verification, like sender verification, was using <> in
6894 the MAIL FROM command. This isn't really the right thing, since the actual
6895 sender may affect whether the remote host accepts the recipient or not. I
6896 have changed it to use the actual sender in the callout; this means that
6897 the cache record is now keyed on a recipient/sender pair, not just the
6898 recipient address. There doesn't seem to be a real danger of callout loops,
6899 since a callout by the remote host to check the sender would use <>.
6900 [SEE ABOVE: changed after hitting problems.]
6902 72. Exim treats illegal SMTP error codes that do not begin with 4 or 5 as
6903 temporary errors. However, in the case of such a code being given after
6904 the end of a data transmission (i.e. after ".") Exim was failing to write
6905 a retry record for the message. (Yes, there was some broken host that was
6906 actually sending 8xx at this point.)
6908 73. An unknown lookup type in a host list could cause Exim to panic-die when
6909 the list was checked. (An example that provoked this was putting <; in the
6910 middle of a list instead of at the start.) If this happened during a DATA
6911 ACL check, a -D file could be left lying around. This kind of configuration
6912 error no longer causes Exim to die; instead it causes a defer error. The
6913 incident is still logged to the main and panic logs.
6915 74. Buglet left over from Exim 3 conversion. The message "too many messages
6916 in one connection" was written to the rejectlog but not the mainlog, except
6917 when address rewriting (yes!) was being logged.
6919 75. Added write_rejectlog option.
6921 76. When a system filter was run not as root (that is, when system_filter_user
6922 was set), the values of the $n variables were not being returned to the
6923 main process; thus, they were not subsequently available in the $sn
6926 77. Added +return_path_on_delivery log selector.
6928 78. A connection timeout was being treated differently from recipients deferred
6929 when testing hosts_max_try with a message that was older than the host's
6930 retry timeout. (The host should not be counted, thus allowing all hosts to
6931 be tried at least once before bouncing.) This may have been the cause of an
6932 occasionally reported bug whereby a message would remain on the queue
6933 longer than the retry timeout, but would be bounced if a delivery was
6934 forced. I say "may" because I never totally pinned down the problem;
6935 setting up timeout/retry tests is difficult. See also the next item.
6937 79. The ultimate address timeout was not being applied to errors that involved
6938 a combination of host plus message (for example, a timeout on a MAIL
6939 command). When an address resolved to a number of possible hosts, and they
6940 were not all tried for each delivery (e.g. because of hosts_max_try), a
6941 message could remain on the queue longer than the retry timeout.
6943 80. Sieve bug: "stop" inside "elsif" was broken. Applied a patch from Michael
6946 81. Fixed an obscure SMTP outgoing bug which required at least the following
6947 conditions: (a) there was another message waiting for the same server;
6948 (b) the server returned 5xx to all RCPT commands in the first message so
6949 that the message was not completed; (c) the server dropped the connection
6950 or gave a negative response to the RSET that Exim sends to abort the
6951 transaction. The observed case was a dropped connection after DATA that had
6952 been sent in pipelining mode. That is, the server had advertised PIPELINING
6953 but was not implementing it correctly. The effect of the bug was incorrect
6954 behaviour, such as trying another host, and this could lead to a crash.
6960 1. The 3rd arguments to getsockname(), getpeername(), and accept() in exim.c
6961 and daemon.c were passed as pointers to ints; they should have been
6962 pointers to socklen_t variables (which are typically unsigned ints).
6964 2. Some signed/unsigned type warnings in the os.c file for Linux have been
6967 3. Fixed a really odd bug that affected only the testing scheme; patching a
6968 certain fixed string in the binary changed the value of another string that
6969 happened to be identical to the end of the original first string.
6971 4. When gethostbyname() (or equivalent) is passed an IP address as a "host
6972 name", it returns that address as the IP address. On some operating
6973 systems (e.g. Solaris), it also passes back the IP address string as the
6974 "host name". However, on others (e.g. Linux), it passes back an empty
6975 string. Exim wasn't checking for this, and was changing the host name to an
6976 empty string, assuming it had been canonicalized.
6978 5. Although rare, it is permitted to have more than one PTR record for a given
6979 IP address. I thought that gethostbyaddr() or getipnodebyaddr() always gave
6980 all the names associated with an address, because they do in Solaris.
6981 However, it seems that they do not in Linux for data that comes from the
6982 DNS. If an address in /etc/hosts has multiple names, they _are_ all given.
6983 I found this out when I moved to a new Linux workstation and tried to run
6984 the Exim test suite.
6986 To get round this problem I have changed the code so that it now does its
6987 own call to the DNS to look up PTR records when searching for a host name.
6988 If nothing can be found in the DNS, it tries gethostbyaddr(), so that
6989 addresses that are only in /etc/hosts are still found.
6991 This behaviour is, however, controlled by an option called host_lookup_
6992 order, which defaults to "bydns:byaddr". If people want to use the other
6993 order, or indeed, just use one or the other means of lookup, they can
6994 specify it in this variable.
6996 6. If a PTR record yields an empty name, Exim treats it as non-existent. In
6997 some operating systems, this comes back from gethostbyaddr() as an empty
6998 string, and this is what Exim used to test for. However, it seems that in
6999 other systems, "." is yielded. Exim now tests for this case too.
7001 7. The values of check_spool_space and check_log_space are now held internally
7002 as a number of kilobytes instead of an absolute number of bytes. If a
7003 numbers is specified without 'K' or 'M', it is rounded up to the nearest
7004 kilobyte. This means that much larger values can be stored.
7006 8. Exim monitor: an attempt to get the action menu when not actually pointing
7007 at a message produces an empty menu entitled "No message selected". This
7008 works on Solaris (OpenWindows). However, XFree86 does not like a menu with
7009 no entries in it ("Shell widget menu has zero width and/or height"). So I
7010 have added a single, blank menu entry in this case.
7012 9. Added ${quote_local_part.
7014 10. MIME decoding is now applied to the contents of Subject: header lines when
7017 11. Now that a reference to $sender_host_address automatically causes a reverse
7018 lookup to occur if necessary (4.13/18), there is no need to arrange for a
7019 host lookup before query-style lookups in lists that might use this
7020 variable. This has therefore been abolished, and the "net-" prefix is no
7021 longer necessary for query-style lookups.
7023 12. The Makefile for SCO_SV contained a setting of LDFLAGS. This appears to
7024 have been a typo for LFLAGS, so it has been changed.
7026 13. The install script calls Exim with "-C /dev/null" in order to find the
7027 version number. If ALT_CONFIG_PREFIX was set, this caused an error message
7028 to be output. However, since Exim outputs its version number before the
7029 error, it didn't break the script. It just looked ugly. I fixed this by
7030 always allowing "-C /dev/null" if the caller is root.
7032 14. Ignore overlarge ACL variable number when reading spool file - insurance
7033 against a later release with more variables having written the file.
7035 15. The standard form for an IPv6 address literal was being rejected by EHLO.
7036 Example: [IPv6:2002:c1ed:8229:10:202:2dff:fe07:a42a]. Exim now accepts
7037 this, as well as the form without the "IPv6" on the front.
7039 16. Added CHOWN_COMMAND=/usr/sbin/chown and LIBS=-lresolv to the
7040 OS/Makefile-Darwin file.
7042 17. Fixed typo in lookups/ldap.c: D_LOOKUP should be D_lookup. This applied
7043 only to LDAP libraries that do not have LDAP_OPT_DEREF.
7045 18. After change 4.21/52, "%ld" was used to format the contents of the $inode
7046 variable. However, some OS use ints for inodes. I've added cast to long int
7047 to get rid of the compiler warning.
7049 19. I had forgotten to lock out "/../" in configuration file names when
7050 ALT_CONFIG_PREFIX was set.
7052 20. Routers used for verification do not need to specify transports. However,
7053 if such a router generated a host list, and callout was configured, Exim
7054 crashed, because it could not find a port number from the (non-existent)
7055 transport. It now assumes port 25 in this circumstance.
7057 21. Added the -t option to exigrep.
7059 22. If LOOKUP_LSEARCH is defined, all three linear search methods (lsearch,
7060 wildlsearch, nwildlsearch) are compiled. LOOKUP_WILDLSEARCH and LOOKUP_
7061 NWILDLSEARCH are now obsolete, but retained for compatibility. If either of
7062 them is set, LOOKUP_LSEARCH is forced.
7064 23. "exim -bV" now outputs a list of lookups that are included in the binary.
7066 24. Added sender and host information to the "rejected by local_scan()" log
7067 line; previously there was no indication of these.
7069 25. Added .include_if_exists.
7071 26. Change 3.952/11 added an explicit directory sync on top of a file sync for
7072 Linux. It turns out that not all file systems support this. Apparently some
7073 versions of NFS do not. (It's rare to put Exim's spool on NFS, but people
7074 do it.) To cope with this, the error EINVAL, which means that sync-ing is
7075 not supported on the file descriptor, is now ignored when Exim is trying to
7076 sync a directory. This applies only to Linux.
7078 27. Added -DBIND_8_COMPAT to the CLFAGS setting for Darwin.
7080 28. In Darwin (MacOS X), the PAM headers are in /usr/include/pam and not in
7081 /usr/include/security. There's now a flag in OS/os.h-Darwin to cope with
7084 29. Added support for maildirsize files from supplied patch (modified a bit).
7086 30. The use of :fail: followed by an empty string could lead Exim to respond to
7087 sender verification failures with (e.g.):
7089 550 Verification failed for <xxx>
7090 550 Sender verify failed
7092 where the first response line was missing the '-' that indicates it is not
7093 the final line of the response.
7095 31. The loop for finding the name of the user that called Exim had a hardwired
7096 limit of 10; it now uses the value of finduser_retries, which is used for
7097 all other user lookups.
7099 32. Added $received_count variable, available in data and not_smtp ACLs, and at
7102 33. Exim was neglecting to zero errno before one call of strtol() when
7103 expanding a string and expecting an integer value. On some systems this
7104 resulted in spurious "integer overflow" errors. Also, it was casting the
7105 result into an int without checking.
7107 34. Testing for a connection timeout using "timeout_connect" in the retry rules
7108 did not work. The code looks as if it has *never* worked, though it appears
7109 to have been documented since at least release 1.62. I have made it work.
7111 35. The "timeout_DNS" error in retry rules, also documented since at least
7112 1.62, also never worked. As it isn't clear exactly what this means, and
7113 clearly it isn't a major issue, I have abolished the feature by treating it
7114 as "timeout", and writing a warning to the main and panic logs.
7116 36. The display of retry rules for -brt wasn't always showing the error code
7119 37. Added new error conditions to retry rules: timeout_A, timeout_MX,
7120 timeout_connect_A, timeout_connect_MX.
7122 38. Rewriting the envelope sender at SMTP time did not allow it to be rewritten
7123 to the empty sender.
7125 39. The daemon was not analysing the content of -oX till after it had closed
7126 stderr and disconnected from the controlling terminal. This meant that any
7127 syntax errors were only noted on the panic log, and the return code from
7128 the command was 0. By re-arranging the code a little, I've made the
7129 decoding happen first, so such errors now appear on stderr, and the return
7130 code is 1. However, the actual setting up of the sockets still happens in
7131 the disconnected process, so errors there are still only recorded on the
7134 40. A daemon listener on a wildcard IPv6 socket that also accepts IPv4
7135 connections (as happens on some IP stacks) was logged at start up time as
7136 just listening for IPv6. It now logs "IPv6 with IPv4". This differentiates
7137 it from "IPv6 and IPv4", which means that two separate sockets are being
7140 41. The debug output for gethostbyname2() or getipnodebyname() failures now
7141 says whether AF_INET or AF_INET6 was passed as an argument.
7143 42. Exiwhat output was messed up when time zones were included in log
7146 43. Exiwhat now gives more information about the daemon's listening ports,
7147 and whether -tls-on-connect was used.
7149 44. The "port" option of the smtp transport is now expanded.
7151 45. A "message" modifier in a "warn" statement in a non-message ACL was being
7152 silently ignored. Now an error message is written to the main and panic
7155 46. There's a new ACL modifier called "logwrite" which writes to a log file
7156 as soon as it is encountered.
7158 47. Added $local_user_uid and $local_user_gid at routing time.
7160 48. Exim crashed when trying to verify a sender address that was being
7163 49. Exim was recognizing only a space character after ".include". It now also
7164 recognizes a tab character.
7166 50. Fixed several bugs in the Perl script that creates the exim.8 man page by
7167 extracting the relevant information from the specification. The man page no
7168 longer contains scrambled data for the -d option, and I've added a section
7169 at the front about calling Exim under different names.
7171 51. Added "extra_headers" argument to the "mail" command in filter files.
7173 52. Redirecting mail to an unqualified address in a Sieve filter caused Exim to
7176 53. Installed eximstats 1.29.
7178 54. Added transport_filter_timeout as a generic transport option.
7180 55. Exim no longer adds an empty Bcc: header to messages that have no To: or
7181 Cc: header lines. This was required by RFC 822, but it not required by RFC
7184 56. Exim used to add From:, Date:, and Message-Id: header lines to any
7185 incoming messages that did not have them. Now it does so only if the
7186 message originates locally, that is, if there is no associated remote host
7187 address. When Resent- header lines are present, this applies to the Resent-
7188 lines rather than the non-Resent- lines.
7190 57. Drop incoming SMTP connection after too many syntax or protocol errors. The
7191 limit is controlled by smtp_max_synprot_errors, defaulting to 3.
7193 58. Messages for configuration errors now include the name of the main
7194 configuration file - useful now that there may be more than one file in a
7195 list (.included file names were always shown).
7197 59. Change 4.21/82 (run initgroups() when starting the daemon) causes problems
7198 for those rare installations that do not start the daemon as root or run it
7199 setuid root. I've cut out the call to initgroups() if the daemon is not
7202 60. The Exim user and group can now be bound into the binary as text strings
7203 that are looked up at the start of Exim's processing.
7205 61. Applied a small patch for the Interbase code, supplied by Ard Biesheuvel.
7207 62. Added $mailstore_basename variable.
7209 63. Installed patch to sieve.c from Michael Haardt.
7211 64. When Exim failed to open the panic log after failing to open the main log,
7212 the original message it was trying to log was written to stderr and debug
7213 output, but if they were not available (the usual case in production), it
7214 was lost. Now it is written to syslog before the two lines that record the
7215 failures to open the logs.
7217 65. Users' Exim filters run in subprocesses under the user's uid. It is
7218 possible for a "deliver" command or an alias in a "personal" command to
7219 provoke an address rewrite. If logging of address rewriting is configured,
7220 this fails because the process is not running as root or exim. There may be
7221 a better way of dealing with this, but for the moment (because 4.30 needs
7222 to be released), I have disabled address rewrite logging when running a
7223 filter in a non-root, non-exim process.
7229 1. The buildconfig auxiliary program wasn't quoting the value set for
7230 HEADERS_CHARSET. This caused a compilation error complaining that 'ISO' was
7231 not defined. This bug was masked in 4.22 by the effect that was fixed in
7234 2. Some messages that were rejected after a message id was allocated were
7235 shown as "incomplete" by exigrep. It no longer does this for messages that
7236 are rejected by local_scan() or the DATA or non-SMTP ACLs.
7238 3. If a Message-ID: header used a domain literal in the ID, and Exim did not
7239 have allow_domain_literals set, the ID did not get logged in the <= line.
7240 Domain literals are now always recognized in Message-ID: header lines.
7242 4. The first argument for a ${extract expansion item is the key name or field
7243 number. Leading and trailing spaces in this item were not being ignored,
7244 causing some misleading effects.
7246 5. When deliver_drop_privilege was set, single queue runner processes started
7247 manually (i.e. by the command "exim -q") or by the daemon (which uses the
7248 same command in the process it spins off) were not dropping privilege.
7250 6. When the daemon running as "exim" started a queue runner, it always
7251 re-executed Exim in the spun-off process. This is a waste of effort when
7252 deliver_drop_privilege is set. The new process now just calls the
7253 queue-runner function directly.
7259 1. Typo in the src/EDITME file: it referred to HEADERS_DECODE_TO instead of
7262 2. Change 4.21/73 introduced a bug. The pid file path set by -oP was being
7263 ignored. Though the use of -oP was forcing the writing of a pid file, it
7264 was always written to the default place.
7266 3. If the message "no IP address found for host xxxx" is generated during
7267 incoming verification, it is now followed by identification of the incoming
7268 connection (so you can more easily find what provoked it).
7270 4. Bug fix for Sieve filters: "stop" inside a block was not working properly.
7272 5. Added some features to "harden" Exim a bit more against certain attacks:
7274 (a) There is now a build-time option called FIXED_NEVER_USERS that can
7275 be put in Local/Makefile. This is like the never_users runtime option,
7276 but it cannot be overridden. The default setting is "root".
7278 (b) If ALT_CONFIG_PREFIX is defined in Local/Makefile, it specifies a
7279 prefix string with which any file named in a -C command line option
7282 (c) If ALT_CONFIG_ROOT_ONLY is defined in Local/Makefile, root privilege
7283 is retained for -C and -D only if the caller of Exim is root. Without
7284 it, the exim user may also use -C and -D and retain privilege.
7286 (d) If DISABLE_D_OPTION is defined in Local/Makefile, the use of the -D
7287 command line option is disabled.
7289 6. Macro names set by the -D option must start with an upper case letter, just
7290 like macro names defined in the configuration file.
7292 7. Added "dereference=" facility to LDAP.
7294 8. Two instances of the typo "uknown" in the source files are fixed.
7296 9. If a PERL_COMMAND setting in Local/Makefile was not at the start of a line,
7297 the Configure-Makefile script screwed up while processing it.
7299 10. Incorporated PCRE 4.4.
7301 11. The SMTP synchronization check was not operating right at the start of an
7302 SMTP session. For example, it could not catch a HELO sent before the client
7303 waited for the greeting. There is now a check for outstanding input at the
7304 point when the greeting is written. Because of the duplex, asynchronous
7305 nature of TCP/IP, it cannot be perfect - the incorrect input may be on its
7306 way, but not yet received, when the check is performed.
7308 12. Added tcp_nodelay to make it possible to turn of the setting of TCP_NODELAY
7309 on TCP/IP sockets, because this apparently causes some broken clients to
7312 13. Installed revised OS/Makefile-CYGWIN and OS/os.c-cygwin (the .h file was
7313 unchanged) from the Cygwin maintainer.
7315 14. The code for -bV that shows what is in the binary showed "mbx" when maildir
7316 was supported instead of testing for mbx. Effectively a typo.
7318 15. The spa authenticator server code was not checking that the input it
7319 received was valid base64.
7321 16. The debug output line for the "set" modifier in ACLs was not showing the
7322 name of the variable that was being set.
7324 17. Code tidy: the variable type "vtype_string" was never used. Removed it.
7326 18. Previously, a reference to $sender_host_name did not cause a DNS reverse
7327 lookup on its own. Something else was needed to trigger the lookup. For
7328 example, a match in host_lookup or the need for a host name in a host list.
7329 Now, if $sender_host_name is referenced and the host name has not yet been
7330 looked up, a lookup is performed. If the lookup fails, the variable remains
7331 empty, and $host_lookup_failed is set to "1".
7333 19. Added "eqi" as a case-independent comparison operator.
7335 20. The saslauthd authentication condition could segfault if neither service
7336 nor realm was specified.
7338 21. If an overflowing value such as "2048M" was set for message_size_limit, the
7339 error message that was logged was misleading, and incoming SMTP
7340 connections were dropped. The message is now more accurate, and temporary
7341 errors are given to SMTP connections.
7343 22. In some error situations (such as 21 above) Exim rejects all SMTP commands
7344 (except RSET) with a 421 error, until QUIT is received. However, it was
7345 failing to send a response to QUIT.
7347 23. The HELO ACL was being run before the code for helo_try_verify_hosts,
7348 which made it impossible to use "verify = helo" in the HELO ACL. The HELO
7349 ACL is now run after the helo_try_verify_hosts code.
7351 24. "{MD5}" and "{SHA1}" are now recognized as equivalent to "{md5"} and
7352 "{sha1}" in the "crypteq" expansion condition (in fact the comparison is
7353 case-independent, so other case variants are also recognized). Apparently
7354 some systems use these upper case variants.
7356 25. If more than two messages were waiting for the same host, and a transport
7357 filter was specified for the transport, Exim sent two messages over the
7358 same TCP/IP connection, and then failed with "socket operation on non-
7359 socket" when it tried to send the third.
7361 26. Added Exim::debug_write and Exim::log_write for embedded Perl use.
7363 27. The extern definition of crypt16() in expand.c was not being excluded when
7364 the OS had its own crypt16() function.
7366 28. Added bounce_return_body as a new option, and bounce_return_size_limit
7367 as a preferred synonym for return_size_limit, both as an option and as an
7370 29. Added LIBS=-liconv to OS/Makefile-OSF1.
7372 30. Changed the default configuration ACL to relax the local part checking rule
7373 for addresses that are not in any local domains. For these addresses,
7374 slashes and pipe symbols are allowed within local parts, but the sequence
7375 /../ is explicitly forbidden.
7377 31. SPA server authentication was not clearing the challenge buffer before
7380 32. log_message in a "warn" ACL statement was writing to the reject log as
7381 well as to the main log, which contradicts the documentation and doesn't
7382 seem right (because no rejection is happening). So I have stopped it.
7384 33. Added Ard Biesheuvel's lookup code for accessing an Interbase database.
7385 However, I am unable to do any testing of this.
7387 34. Fixed an infelicity in the appendfile transport. When checking directories
7388 for a mailbox, to see if any needed to be created, it was accidentally
7389 using path names with one or more superfluous leading slashes; tracing
7390 would show up entries such as stat("///home/ph10", 0xFFBEEA48).
7392 35. If log_message is set on a "discard" verb in a MAIL or RCPT ACL, its
7393 contents are added to the log line that is written for every discarded
7394 recipient. (Previously a log_message setting was ignored.)
7396 36. The ${quote: operator now quotes the string if it is empty.
7398 37. The install script runs exim in order to find its version number. If for
7399 some reason other than non-existence or emptiness, which it checks, it
7400 could not run './exim', it was installing it with an empty version number,
7401 i.e. as "exim-". This error state is now caught, and the installation is
7404 38. An argument was missing from the function that creates an error message
7405 when Exim fails to connect to the socket for saslauthd authentication.
7406 This could cause Exim to crash, or give a corrupted message.
7408 39. Added isip, isip4, and isip6 to ${if conditions.
7410 40. The ACL variables $acl_xx are now saved with the message, and can be
7411 accessed later in routers, transports, and filters.
7413 41. The new lookup type nwildlsearch is like wildlsearch, except that the key
7414 strings in the file are not string-expanded.
7416 42. If a MAIL command specified a SIZE value that was too large to fit into an
7417 int variable, the check against message_size_limit failed. Such values are
7418 now forced to INT_MAX, which is around 2Gb for a 32-bit variable. Maybe one
7419 day this will have to be increased, but I don't think I want to be around
7420 when emails are that large.
7427 1. Removed HAVE_ICONV=yes from OS/Makefile-FreeBSD, since it seems that
7428 iconv() is not standard in FreeBSD.
7430 2. Change 4.21/17 was buggy and could cause stack overwriting on a system with
7431 IPv6 enabled. The observed symptom was a segmentation fault on return from
7432 the function os_common_find_running_interfaces() in src/os.c.
7434 3. In the check_special_case() function in daemon.c I had used "errno" as an
7435 argument name, which causes warnings on some systems. This was basically a
7436 typo, since it was named "eno" in the comments!
7438 4. The code that waits for the clock to tick (at a resolution of some fraction
7439 of a second) so as to ensure message-id uniqueness was always waiting for
7440 at least one whole tick, when it could have waited for less. [This is
7441 almost certainly not relevant at current processor speeds, where it is
7442 unlikely to ever wait at all. But we try to future-proof.]
7444 5. The function that sleeps for a time interval that includes fractions of a
7445 second contained a race. It did not block SIGALRM between setting the
7446 timer, and suspending (a couple of lines later). If the interval was short
7447 and the sigsuspend() was delayed until after it had expired, the suspension
7448 never ended. On busy systems this could lead to processes getting stuck for
7451 6. Some uncommon configurations may cause a lookup to happen in a queue runner
7452 process, before it forks any delivery processes. The open lookup caching
7453 mechanism meant that the open file or database connection was passed into
7454 the delivery process. The problem was that delivery processes always tidy
7455 up cached lookup data. This could cause a problem for the next delivery
7456 process started by the queue runner, because the external queue runner
7457 process does not know about the closure. So the next delivery process
7458 still has data in the lookup cache. In the case of a file lookup, there was
7459 no problem because closing a file descriptor in a subprocess doesn't affect
7460 the parent. However, if the lookup was caching a connection to a database,
7461 the connection was closed, and the second delivery process was likely to
7462 see errors such as "PGSQL: query failed: server closed the connection
7463 unexpectedly". The problem has been fixed by closing all cached lookups
7464 in a queue runner before running a delivery process.
7466 7. Compiler warning on Linux for the second argument of iconv(), which doesn't
7467 seem to have the "const" qualifier which it has on other OS. I've
7470 8. Change 4.21/2 was too strict. It is only if there are two authenticators
7471 *of the same type* (client or server) with the same public name that an
7472 error should be diagnosed.
7474 9. When Exim looked up a host name for an IP address, but failed to find the
7475 original IP address when looking up the host name (a safety check), it
7476 output the message "<ip address> does not match any IP for NULL", which was
7477 confusing, to say the least. The bug was that the host name should have
7478 appeared instead of "NULL".
7480 10. Since release 3.03, if Exim is called by a uid other than root or the Exim
7481 user that is built into the binary, and the -C or -D options is used, root
7482 privilege is dropped before the configuration file is read. In addition,
7483 logging is switched to stderr instead of the normal log files. If the
7484 configuration then re-defines the Exim user, the unprivileged environment
7485 is probably not what is expected, so Exim logs a panic warning message (but
7488 However, if deliver_drop_privilege is set, the unprivileged state may well
7489 be exactly what is intended, so the warning has been cut out in that case,
7490 and Exim is allowed to try to write to its normal log files.
7496 1. smtp_return_error_details was not giving details for temporary sender
7497 or receiver verification errors.
7499 2. Diagnose a configuration error if two authenticators have the same public
7502 3. Exim used not to create the message log file for a message until the first
7503 delivery attempt. This could be confusing when incoming messages were held
7504 for policy or load reasons. The message log file is now created at the time
7505 the message is received, and an initial "Received" line is written to it.
7507 4. The automatically generated man page for command line options had a minor
7508 bug that caused no ill effects; however, a more serious problem was that
7509 the procedure for building the man page automatically didn't always
7510 operate. Consequently, release 4.20 contains an out-of-date version. This
7511 shouldn't happen again.
7513 5. When building Exim with embedded Perl support, the script that builds the
7514 Makefile was calling 'perl' to find its compile-time parameters, ignoring
7515 any setting of PERL_COMMAND in Local/Makefile. This is now fixed.
7517 6. The freeze_tell option was not being used for messages that were frozen on
7518 arrival, either by an ACL or by local_scan().
7520 7. Added the smtp_incomplete_transaction log selector.
7522 8. After STARTTLS, Exim was not forgetting that it had advertised AUTH, so it
7523 was accepting AUTH without a new EHLO.
7525 9. Added tls_remember_esmtp to cope with YAEB. This allows AUTH and other
7526 ESMTP extensions after STARTTLS without a new EHLO, in contravention of the
7529 10. Logging of TCP/IP connections (when configured) now happens in the main
7530 daemon process instead of the child process, so that the TCP/IP connection
7531 count is more accurate (but it can never be perfect).
7533 11. The use of "drop" in a nested ACL was not being handled correctly in the
7534 outer ACL. Now, if condition failure induced by the nested "drop" causes
7535 the outer ACL verb to deny access ("accept" or "discard" after "endpass",
7536 or "require"), the connection is dropped.
7538 12. Similarly, "discard" in a nested ACL wasn't being handled. A nested ACL
7539 that yield "discard" can now be used with an "accept" or a "discard" verb,
7540 but an error is generated for any others (because I can't see a useful way
7541 to define what should happen).
7543 13. When an ACL is read dynamically from a file (or anywhere else), the lines
7544 are now processed in the same way as lines in the Exim configuration file.
7545 In particular, continuation lines are supported.
7547 14. Added the "dnslists = a.b.c!=n.n.n.n" feature.
7549 15. Added -ti meaning -t -i.
7551 16. Check for letters, digits, hyphens, and dots in the names of dnslist
7552 domains, and warn by logging if others are found.
7554 17. At least on BSD, alignment is not guaranteed for the array of ifreq's
7555 returned from GIFCONF when Exim is trying to find the list of interfaces on
7556 a host. The code in os.c has been modified to copy each ifreq to an aligned
7557 structure in all cases.
7559 Also, in some cases, the returned ifreq's were being copied to a 'struct
7560 ifreq' on the stack, which was subsequently passed to host_ntoa(). That
7561 means the last couple of bytes of an IPv6 address could be chopped if the
7562 ifreq contained only a normal sockaddr (14 bytes storage).
7564 18. Named domain lists were not supported in the hosts_treat_as_local option.
7565 An entry such as +xxxx was not recognized, and was treated as a literal
7568 19. Ensure that header lines added by a DATA ACL are included in the reject log
7569 if the ACL subsequently rejects the message.
7571 20. Upgrade the cramtest.pl utility script to use Digest::MD5 instead of just
7572 MD5 (which is deprecated).
7574 21. When testing a filter file using -bf, Exim was writing a message when it
7575 took the sender from a "From " line in the message, but it was not doing so
7576 when it took $return_path from a Return-Path: header line. It now does.
7578 22. If the contents of a "message" modifier for a "warn" ACL verb do not begin
7579 with a valid header line field name (a series of printing characters
7580 terminated by a colon, Exim now inserts X-ACL-Warn: at the beginning.
7582 23. Changed "disc" in the source to "disk" to conform to the documentation and
7583 the book and for uniformity.
7585 24. Ignore Sendmail's -Ooption=value command line item.
7587 25. When execve() failed while trying to run a command in a pipe transport,
7588 Exim was returning EX_UNAVAILABLE (69) from the subprocess. However, this
7589 could be confused with a return value of 69 from the command itself. This
7590 has been changed to 127, the value the shell returns if it is asked to run
7591 a non-existent command. The wording for the related log line suggests a
7592 non-existent command as the problem.
7594 26. If received_header_text expands to an empty string, do not add a Received:
7595 header line to the message. (Well, it adds a token one on the spool, but
7596 marks it "old" so that it doesn't get used or transmitted.)
7598 27. Installed eximstats 1.28 (addition of -nt option).
7600 28. There was no check for failure on the call to getsockname() in the daemon
7601 code. This can fail if there is a shortage of resources on the system, with
7602 ENOMEM, for example. A temporary error is now given on failure.
7604 29. Contrary to the C standard, it seems that in some environments, the
7605 equivalent of setlocale(LC_ALL, "C") is not obeyed at the start of a C
7606 program. Exim now does this explicitly; it affects the formatting of
7607 timestamps using strftime().
7609 30. If exiqsumm was given junk data, it threw up some uninitialized variable
7610 complaints. I've now initialized all the variables, to avoid this.
7612 32. Header lines added by a system filter were not being "seen" during
7613 transport-time rewrites.
7615 33. The info_callback() function passed to OpenSSL is set up with type void
7616 (*)(SSL *, int, int), as described somewhere. However, when calling the
7617 function (actually a macro) that sets it up, the type void(*)() is
7618 expected. I've put in a cast to prevent warnings from picky compilers.
7620 34. If a DNS black list lookup found a CNAME record, but there were no A
7621 records associated with the domain it pointed at, Exim crashed.
7623 35. If a DNS black list lookup returned more than one A record, Exim ignored
7624 all but the first. It now scans all returned addresses if a particular IP
7625 value is being sought. In this situation, the contents of the
7626 $dnslist_value variable are a list of all the addresses, separated by a
7629 36. Tightened up the rules for host name lookups using reverse DNS. Exim used
7630 to accept a host name and all its aliases if the forward lookup for any of
7631 them yielded the IP address of the incoming connection. Now it accepts only
7632 those names whose forward lookup yields the correct IP address. Any other
7633 names are discarded. This closes a loophole whereby a rogue DNS
7634 administrator could create reverse DNS records to break through a
7635 wildcarded host restriction in an ACL.
7637 37. If a user filter or a system filter that ran in a subprocess used any of
7638 the numerical variables ($1, $2 etc), or $thisaddress, in a pipe command,
7639 the wrong values were passed to the pipe command ($thisaddress had the
7640 value of $0, $0 had the value of $1, etc). This bug was introduced by
7641 change 4.11/101, and not discovered because I wrote an inadequate test. :-(
7643 38. Improved the line breaking for long SMTP error messages from ACLs.
7644 Previously, if there was no break point between 40 and 75 characters, Exim
7645 left the rest of the message alone. Two changes have been made: (a) I've
7646 reduced the minimum length to 35 characters; (b) if it can't find a break
7647 point between 35 and 75 characters, it looks ahead and uses the first one
7648 that it finds. This may give the occasional overlong line, but at least the
7649 remaining text gets split now.
7651 39. Change 82 of 4.11 was unimaginative. It assumed the limit on the number of
7652 file descriptors might be low, and that setting 1000 would always raise it.
7653 It turns out that in some environments, the limit is already over 1000 and
7654 that lowering it causes trouble. So now Exim takes care not to decrease it.
7656 40. When delivering a message, the value of $return_path is set to $sender_
7657 address at the start of routing (routers may change the value). By an
7658 oversight, this default was not being set up when an address was tested by
7659 -bt or -bv, which affected the outcome if any router or filter referred to
7662 41. The idea of the "warn" ACL verb is that it adds a header or writes to the
7663 log only when "message" or "log_message" are set. However, if one of the
7664 conditions was an address verification, or a call to a nested ACL, the
7665 messages generated by the underlying test were being passed through. This
7666 no longer happens. The underlying message is available in $acl_verify_
7667 message for both "message" and "log_message" expansions, so it can be
7668 passed through if needed.
7670 42. Added RFC 2047 interpretation of header lines for $h_ expansions, with a
7671 new expansion $bh_ to give the encoded byte string without charset
7672 translation. Translation happens only if iconv() is available; HAVE_ICONV
7673 indicates this at build time. HEADERS_CHARSET gives the charset to
7674 translate to; headers_charset can change it in the configuration, and
7675 "headers charset" can change it in an individual filter file.
7677 43. Now that we have a default RFC 2047 charset (see above), the code in Exim
7678 that creates RFC 2047 encoded "words" labels them as that charset instead
7679 of always using iso-8859-1. The cases are (i) the explicit ${rfc2047:
7680 expansion operator; (ii) when Exim creates a From: line for a local
7681 message; (iii) when a header line is rewritten to include a "phrase" part.
7683 44. Nasty bug in exiqsumm: the regex to skip already-delivered addresses was
7684 buggy, causing it to skip the first lines of messages whose message ID
7685 ended in 'D'. This would not have bitten before Exim release 4.14, because
7686 message IDs were unlikely to end in 'D' before then. The effect was to have
7687 incorrect size information for certain domains.
7689 45. #include "config.h" was missing at the start of the crypt16.c module. This
7690 caused trouble on Tru64 (aka OSF1) systems, because HAVE_CRYPT16 was not
7693 46. If there was a timeout during a "random" callout check, Exim treated it as
7694 a failure of the random address, and carried on sending RSET and the real
7695 address. If the delay was just some slowness somewhere, the response to the
7696 original RCPT would be taken as a response to RSET and so on, causing
7697 mayhem of various kinds.
7699 47. Change 50 for 4.20 was a heap of junk. I don't know what I was thinking
7700 when I implemented it. It didn't allow for the fact that some option values
7701 may legitimately be negative (e.g. size_addition), and it didn't even do
7702 the right test for positive values.
7704 48. Domain names in DNS records are case-independent. Exim always looks them up
7705 in lower case. Some resolvers return domain names in exactly the case they
7706 appear in the zone file, that is, they may contain uppercase letters. Not
7707 all resolvers do this - some return always lower case. Exim was treating a
7708 change of case by a resolver as a change of domain, similar to a widening
7709 of a domain abbreviation. This triggered its re-routing code and so it was
7710 trying to route what was effectively the same domain again. This normally
7711 caused routing to fail (because the router wouldn't handle the domain
7712 twice). Now Exim checks for this case specially, and just changes the
7713 casing of the domain that it ultimately uses when it transmits the message
7716 49. Added Sieve (RFC 3028) support, courtesy of Michael Haardt's contributed
7719 50. If a filter generated a file delivery with a non-absolute name (possible if
7720 no home directory exists for the router), the forbid_file option was not
7723 51. Added '&' feature to dnslists, to provide bit mask matching in addition to
7724 the existing equality matching.
7726 52. Exim was using ints instead of ino_t variables in some places where it was
7727 dealing with inode numbers.
7729 53. If TMPDIR is defined in Local/Makefile (default in src/EDITME is
7730 TMPDIR="/tmp"), Exim checks for the presence of an environment variable
7731 called TMPDIR, and if it finds it is different, it changes its value.
7733 54. The smtp_printf() function is now made available to local_scan() so
7734 additional output lines can be written before returning. There is also an
7735 smtp_fflush() function to enable the detection of a dropped connection.
7736 The variables smtp_input and smtp_batched_input are exported to
7739 55. Changed the default runtime configuration: the message "Unknown user"
7740 has been removed from the ACL, and instead placed on the localuser router,
7741 using the cannot_route_message feature. This means that any verification
7742 failures that generate their own messages won't get overridden. Similarly,
7743 the "Unrouteable address" message that was in the ACL for unverifiable
7744 relay addresses has also been removed.
7746 56. Added hosts_avoid_esmtp to the smtp transport.
7748 57. The exicyclog script was not checking for the esoteric option
7749 CONFIGURE_FILE_USE_EUID in the Local/Makefile. It now does this, but it
7750 will work only if exicyclog is run under the appropriate euid.
7752 58. Following a discussion on the list, the rules by which Exim recognises line
7753 endings on incoming messages have been changed. The -dropcr and drop_cr
7754 options are now no-ops, retained only for backwards compatibility. The
7755 following line terminators are recognized: LF CRLF CR. However, special
7756 processing applies to CR:
7758 (i) The sequence CR . CR does *not* terminate an incoming SMTP message,
7759 nor a local message in the state where . is a terminator.
7761 (ii) If a bare CR is encountered in a header line, an extra space is added
7762 after the line terminator so as not to end the header. The reasoning
7763 behind this is that bare CRs in header lines are most likely either
7764 to be mistakes, or people trying to play silly games.
7766 59. The size of a message, as listed by "-bp" or in the Exim monitor window,
7767 was being incorrectly given as 18 bytes larger than it should have been.
7768 This is a VOB (very old bug).
7770 60. This may never have affected anything current, but just in case it has:
7771 When the local host is found other than at the start of a list of hosts,
7772 the local host, those with the same MX, and any that follow, are discarded.
7773 When the list in question was part of a longer list of hosts, the following
7774 hosts (not currently being processed) were also being discarded. This no
7775 longer happens. I'm not sure if this situation could ever has previously
7778 61. Added the "/MX" feature to lists of hosts in the manualroute and query
7781 62. Whenever Exim generates a new message, it now adds an Auto-Submitted:
7782 header. This is something that is recommended in a new Internet Draft, and
7783 is something that is documented as being done by Sendmail. There are two
7784 possible values. For messages generated by the autoreply transport, Exim
7787 Auto-Submitted: auto-replied
7789 whereas for all other generated messages (e.g. bounces) it adds
7791 Auto-Submitted: auto-generated
7793 63. The "personal" condition in filters now includes a test for the
7794 Auto-Submitted: header. If it contains the string "auto-" the message it
7795 not considered personal.
7797 64. Added rcpt_include_affixes as a generic transport option.
7799 65. Added queue_only_override (default true).
7801 66. Added the syslog_duplication option.
7803 67. If what should have been the first header line of a message consisted of
7804 a space followed by a colon, Exim was mis-interpreting it as a header line.
7805 It isn't of course - it is syntactically invalid and should therefore be
7806 treated as the start of the message body. The misbehaviour could have
7807 caused a number of strange effects, including loss of data in subsequent
7808 header lines, and spool format errors.
7810 68. Formerly, the AUTH parameter on a MAIL command was trusted only if the
7811 client host had authenticated. This control can now be exercised by an ACL
7812 for more flexibility.
7814 69. By default, callouts do not happen when testing with -bh. There is now a
7815 variant, -bhc, which does actually run the callout code, including
7816 consulting and updating the callout cache.
7818 70. Added support for saslauthd authentication, courtesy of Alexander
7821 71. If statvfs() failed on the spool or log directories while checking their
7822 size for availability, Exim confusingly gave the error "space shortage".
7823 Furthermore, in debugging mode it crashed with a floating point exception.
7824 These checks are done if check_{spool,log}_{space,inodes} are set, and when
7825 an SMTP message arrives with SIZE= on the MAIL command. As this is a really
7826 serious problem, Exim now writes to the main and panic logs when this
7827 happens, with details of the failure. It then refuses to accept the
7828 incoming message, giving the message "spool directory problem" or "log
7829 directory problem" with a 421 code for SMTP messages.
7831 72. When Exim is about to re-exec itself, it ensures that the file descriptors
7832 0, 1, and 2 exist, because some OS complain for execs without them (see
7833 ChangeLog 4.05/30). If necessary, Exim opens /dev/null to use for these
7834 descriptors. However, the code omitted to check that the open succeeded,
7835 causing mysterious errors if for some reason the permissions on /dev/null
7836 got screwed. Now Exim writes a message to the main and panic logs, and
7837 bombs out if it can't open /dev/null.
7839 73. Re-vamped the way daemon_smtp_port, local_interfaces, and -oX work and
7840 interact so that it is all more flexible. It is supposed to remain
7841 backwards compatible. Also added extra_local_interfaces.
7843 74. Invalid data sent to a SPA (NTLM) server authenticator could cause the code
7844 to bomb out with an assertion failure - to the client this appears as a
7845 connection drop. This problem occurs in the part of the code that was taken
7846 from the Samba project. Fortunately, the assertion is in a very simple
7847 function, so I have fixed this by reproducing the function inline in the
7848 one place where it is called, and arranging for authentication to fail
7849 instead of killing the process with assert().
7851 75. The SPA client code was not working when the server requested OEM rather
7852 than Unicode encoding.
7854 76. Added code to make require_files with a specific uid setting more usable in
7855 the case where statting the file as root fails - usually a non-root-mounted
7856 NFS file system. When this happens and the failure is EACCES, Exim now
7857 forks a subprocess and does the per-uid checking as the relevant uid.
7859 77. Added process_log_path.
7861 78. If log_file_path was not explicitly set, a setting of check_log_space or
7862 check_log_inodes was ignored.
7864 79. If a space check for the spool or log partitions fails, the incident is now
7865 logged. Of course, in the latter case the data may get lost...
7867 80. Added the %p formatting code to string_format() so that it can be used to
7868 print addresses in debug_print(). Adjusted all the address printing in the
7869 debugging in store.c to use %p rather than %d.
7871 81. There was a concern that a line of code in smtp_in.c could overflow a
7872 buffer if a HELO/EHLO command was given followed by 500 or so spaces. As
7873 initially expressed, the concern was not well-founded, because trailing
7874 spaces are removed early. However, if the trailing spaces were followed by
7875 a NULL, they did not get removed, so the overflow was possible. Two fixes
7878 (a) I re-wrote the offending code in a cleaner fashion.
7879 (b) If an incoming SMTP command contains a NULL character, it is rejected
7882 82. When Exim changes uid/gid to the Exim user at daemon start time, it now
7883 runs initgroups(), so that if the Exim user is in any additional groups,
7884 they will be used during message reception.
7890 The change log for 4.20 and earlier releases has been archived.
git://git.exim.org / users / heiko / exim.git / blob