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 Fix "spam" ACL condition. Previously, tainted values for the "name"
73 argument resulted in a trap. There is no reason to disallow such; this
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.
99 JH/01 Avoid costly startup code when not strictly needed. This reduces time
100 for some exim process initialisations. It does mean that the logging
101 of TLS configuration problems is only done for the daemon startup.
103 JH/02 Early-pipelining support code is now included unless disabled in Makefile.
105 JH/03 DKIM verification defaults no long accept sha1 hashes, to conform to
106 RFC 8301. They can still be enabled, using the dkim_verify_hashes main
109 JH/04 Support CHUNKING from an smtp transport using a transport_filter, when
110 DKIM signing is being done. Previously a transport_filter would always
111 disable CHUNKING, falling back to traditional DATA.
113 JH/05 Regard command-line receipients as tainted.
115 JH/06 Bug 340: Remove the daemon pid file on exit, whe due to SIGTERM.
117 JH/07 Bug 2489: Fix crash in the "pam" expansion condition. It seems that the
118 PAM library frees one of the arguments given to it, despite the
119 documentation. Therefore a plain malloc must be used.
121 JH/08 Bug 2491: Use tainted buffers for the transport smtp context. Previously
122 on-stack buffers were used, resulting in a taint trap when DSN information
123 copied from a received message was written into the buffer.
125 JH/09 Bug 2493: Harden ARC verify against Outlook, whick has been seen to mix
126 the ordering of its ARC headers. This caused a crash.
128 JH/10 Bug 2492: Use tainted memory for retry record when needed. Previously when
129 a new record was being constructed with information from the peer, a trap
132 JH/11 Bug 2494: Unset the default for dmarc_tld_file. Previously a naiive
133 installation would get error messages from DMARC verify, when it hit the
134 nonexistent file indicated by the default. Distros wanting DMARC enabled
135 should both provide the file and set the option.
136 Also enforce no DMARC verification for command-line sourced messages.
138 JH/12 Fix an uninitialised flag in early-pipelining. Previously connections
139 could, depending on the platform, hang at the STARTTLS response.
141 JH/13 Bug 2498: Reset a counter used for ARC verify before handling another
142 message on a connection. Previously if one message had ARC headers and
143 the following one did not, a crash could result when adding an
144 Authentication-Results: header.
146 JH/14 Bug 2500: Rewind some of the common-coding in string handling between the
147 Exim main code and Exim-related utities. The introduction of taint
148 tracking also did many adjustments to string handling. Since then, eximon
149 frequently terminated with an assert failure.
151 JH/15 When PIPELINING, synch after every hundred or so RCPT commands sent and
152 check for 452 responses. This slightly helps the inefficieny of doing
153 a large alias-expansion into a recipient-limited target. The max_rcpt
154 transport option still applies (and at the current default, will override
155 the new feature). The check is done for either cause of synch, and forces
156 a fast-retry of all 452'd recipients using a new MAIL FROM on the same
157 connection. The new facility is not tunable at this time.
159 JH/16 Fix the variables set by the gsasl authenticator. Previously a pointer to
160 library live data was being used, so the results became garbage. Make
161 copies while it is still usable.
163 JH/17 Logging: when the deliver_time selector ise set, include the DT= field
164 on delivery deferred (==) and failed (**) lines (if a delivery was
165 attemtped). Previously it was only on completion (=>) lines.
167 JH/18 Authentication: the gsasl driver not provides the $authN variables in time
168 for the expansion of the server_scram_iter and server_scram_salt options.
170 WB/01 SPF: DNS lookups for the obsolete SPF RR type done by the libspf2 library
171 are now specifically given a NO_DATA response without hitting the system
172 resolver. The library goes on to do the now-standard TXT lookup.
173 Use of dnsdb lookups is not affected.
175 JH/19 Bug 2507: Modules: on handling a dynamic-module (lookups) open failure,
176 only retrieve the errormessage once. Previously two calls to dlerror()
177 were used, and the second one (for mainlog/paniclog) retrieved null
180 JH/20 Taint checking: disallow use of tainted data for
181 - the appendfile transport file and directory options
182 - the pipe transport command
183 - the autoreply transport file, log and once options
184 - file names used by the redirect router (including filter files)
186 - paths used by single-key lookups
187 Previously this was permitted.
189 JH/21 Bug 2501: Fix init call in the heimdal authenticator. Previously it
190 adjusted the size of a major service buffer; this failed because the
191 buffer was in use at the time. Change to a compile-time increase in the
192 buffer size, when this authenticator is compiled into exim.
194 JH/22 Taint-checking: move to safe-mode taint checking on all platforms. The
195 previous fast-mode was untenable in the face of glibs using mmap to
196 support larger malloc requests.
198 PP/01 Update the openssl_options possible values through OpenSSL 1.1.1c.
199 New values supported, if defined on system where compiled:
200 allow_no_dhe_kex, cryptopro_tlsext_bug, enable_middlebox_compat,
201 no_anti_replay, no_encrypt_then_mac, prioritize_chacha, tlsext_padding
203 JH/23 Performance improvement in the initial phase of a two-pass queue run. By
204 running a limited number of proceses in parallel, a benefit is gained. The
205 amount varies with the platform hardware and load. The use of the option
206 queue_run_in_order means we cannot do this, as ordering becomes
209 JH/24 Bug 2524: fix the cyrus_sasl auth driver gssapi usage. A previous fix
210 had introduced a string-copy (for ensuring NUL-termination) which was not
211 appropriate for that case, which can include embedded NUL bytes in the
212 block of data. Investigation showed the copy to actually be needless, the
213 data being length-specified.
215 JH/25 Fix use of concurrent TLS connections under GnuTLS. When a callout was
216 done during a receiving connection, and both used TLS, global info was
217 used rather than per-connection info for tracking the state of data
218 queued for transmission. This could result in a connection hang.
220 JH/26 Fix use of the SIZE parameter on MAIL commands, on continued connections.
221 Previously, when delivering serveral messages down a single connection
222 only the first would provide a SIZE. This was due to the size information
223 not being properly tracked.
225 JH/27 Bug 2530: When operating in a timezone with sub-minute offset, such as
226 TAI (at 37 seconds currently), pretend to be in UTC for time-related
227 expansion and logging. Previously, spurious values such as a future
228 minute could be seen.
230 JH/28 Bug 2533: Fix expansion of ${tr } item. When called in some situations
231 it could crash from a null-deref. This could also affect the
232 ${addresses: } operator and ${readsock } item.
234 JH/29 Bug 2537: Fix $mime_part_count. When a single connection had a non-mime
235 message following a mime one, the variable was not reset.
237 JH/30 When an pipelined-connect fails at the first response, assume incorrect
238 cached capability (perhaps the peer reneged?) and immediately retry in
241 JH/31 Fix spurious detection of timeout while writing to transport filter.
243 JH/32 Bug 2541: Fix segfault on bad cmdline -f (sender) argument. Previously
244 an attempt to copy the string was made before checking it.
246 JH/33 Fix the dsearch lookup to return an untainted result. Previously the
247 taint of the lookup key was maintained; we now regard the presence in the
248 filesystem as sufficient validation.
250 JH/34 Fix the readsocket expansion to not segfault when an empty "options"
251 argument is supplied.
253 JH/35 The dsearch lookup now requires that the directory is an absolute path.
254 Previously this was not checked, and nonempty relative paths made an
255 access under Exim's current working directory.
257 JH/36 Bug 2554: Fix msg:defer event for the hosts_max_try_hardlimit case.
258 Previously no event was raised.
260 JH/37 Bug 2552: Fix the check on spool space during reception to use the SIZE
261 parameter supplied by the sender MAIL FROM command. Previously it was
262 ignored, and only the check_spool_space option value for the required
265 JH/38 Fix $dkim_key_length. This should, after a DKIM verification, present
266 the size of the signing public-key. Previously it was instead giving
267 the size of the signature hash.
269 JH/39 DKIM verification: the RFC 8301 restriction on sizes of RSA keys is now
270 the default. See the (new) dkim_verify_min_keysizes option.
272 JH/40 Fix a memory-handling bug: when a connection carried multiple messages
273 and an ACL use a lookup for checking either the local_part or domain,
274 stale data could be accessed. Ensure that variable references are
275 dropped between messages.
277 JH/41 Bug 2571: Fix SPA authenticator. Running as a server, an offset supplied
278 by the client was not checked as pointing within response data before
279 being used. A malicious client could thus cause an out-of-bounds read and
280 possibly gain authentication. Fix by adding the check.
282 JH/42 Internationalisation: change the default for downconversion in the smtp
283 transport to be "if needed". Previously it was "as previously set" for
284 the message, which usually meant "if needed" for message-submission but
285 "no" for everything else. However, MTAs have been seen using SMTPUTF8
286 even when the envelope addresses did not need it, resulting in forwarding
287 failures to non-supporting MTAs. A downconvert in such cases will be
288 a no-op on the addresses, merely dropping the use of SMTPUTF8 by the
289 transport. The change does mean that addresses needing conversion will
290 be converted when previously a delivery failure would occur.
292 JH/43 Fix possible long line in DSN. Previously when a very long SMTP error
293 response was received it would be used unchecked in a fail-DSN, violating
294 standards on line-length limits. Truncate if needed.
296 HS/01 Remove parameters of the link to www.open-spf.org. The linked form
297 doesn't work. (Additionally add a new main config option to configure the
304 JH/01 OpenSSL: With debug enabled output keying information sufficient, server
305 side, to decode a TLS 1.3 packet capture.
307 JH/02 OpenSSL: Suppress the sending of (stateful) TLS1.3 session tickets.
308 Previously the default library behaviour applied, sending two, each in
311 JH/03 Debug output for ACL now gives the config file name and line number for
314 JH/04 The default received_header_text now uses the RFC 8314 tls cipher clause.
316 JH/05 DKIM: ensure that dkim_domain elements are lowercased before use.
318 JH/06 Fix buggy handling of autoreply bounce_return_size_limit, and a possible
319 buffer overrun for (non-chunking) other transports.
321 JH/07 GnuTLS: Our use of late (post-handshake) certificate verification, under
322 TLS1.3, means that a server rejecting a client certificate is not visible
323 to the client until the first read of encrypted data (typically the
324 response to EHLO). Add detection for that case and treat it as a failed
325 TLS connection attempt, so that the normal retry-in-clear can work (if
326 suitably configured).
328 JB/01 Bug 2375: fix expansions of 822 addresses having comments in local-part
329 and/or domain. Found and fixed by Jason Betts.
331 JH/08 Add hardening against SRV & TLSA lookups the hit CNAMEs (a nonvalid
332 configuration). If a CNAME target was not a wellformed name pattern, a
335 JH/09 Logging: Fix initial listening-on line for multiple ports for an IP when
336 the OS reports them interleaved with other addresses.
338 JH/10 OpenSSL: Fix aggregation of messages. Previously, when PIPELINING was
339 used both for input and for a verify callout, both encrypted, SMTP
340 responses being sent by the server could be lost. This resulted in
341 dropped connections and sometimes bounces generated by a peer sending
344 JH/11 Harden plaintext authenticator against a badly misconfigured client-send
345 string. Previously it was possible to cause undefined behaviour in a
346 library routine (usually a crash). Found by "zerons".
348 JH/12 Bug 2384: fix "-bP smtp_receive_timeout". Previously it returned no
351 JH/13 Bug 2386: Fix builds with Dane under LibreSSL 2.9.0 onward. Some old
352 API was removed, so update to use the newer ones.
354 JH/14 Bug 1891: Close the log file if receiving a non-smtp message, without
355 any timeout set, is taking a long time. Previously we would hang on to a
356 rotated logfile "forever" if the input was arriving with long gaps
357 (a previous attempt to fix addressed lack, for a long time, of initial
360 HS/01 Bug 2390: Use message_id for tempfile creation to avoid races in a
361 shared (NFS) environment. The length of the tempfile name is now
362 4 + 16 ("hdr.$message_exim_id") which might break on file
363 systems which restrict the file name length to lower values.
366 HS/02 Bug 2390: Use message_id for tempfile creation to avoid races in a
367 shared (NFS) environment.
369 HS/03 Bug 2392: exigrep does case sensitive *option* processing (as it
370 did for all versions <4.90). Notably -M, -m, --invert, -I may be
373 JH/15 Use unsigned when creating bitmasks in macros, to avoid build errors
374 on some platforms for bit 31.
376 JH/16 GnuTLS: rework ciphersuite strings under recent library versions. Thanks
377 to changes apparently associated with TLS1.3 handling some of the APIs
378 previously used were either nonfunctional or inappropriate. Strings
379 like TLS1.3:ECDHE_SECP256R1__RSA_PSS_RSAE_SHA256__AES_256_GCM__AEAD:256
380 and TLS1.2:ECDHE_SECP256R1__RSA_SHA256__AES_128_CBC__SHA256:128 replace
381 the previous TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256 .
382 This affects log line X= elements, the $tls_{in,out}_cipher variables,
383 and the use of specific cipher names in the encrypted= ACL condition.
385 JH/17 OpenSSL: the default openssl_options now disables ssl_v3.
387 JH/18 GnuTLS: fix $tls_out_ocsp under hosts_request_ocsp. Previously the
388 verification result was not updated unless hosts_require_ocsp applied.
390 JH/19 Bug 2398: fix listing of a named-queue. Previously, even with the option
391 queue_list_requires_admin set to false, non-admin users were denied the
394 JH/20 Bug 2389: fix server advertising of usable certificates, under GnuTLS in
395 directory-of-certs mode. Previously they were advertised despite the
398 JH/21 The smtp transport option "hosts_noproxy_tls" is now unset by default.
399 A single TCP connection by a client will now hold a TLS connection open
400 for multiple message deliveries, by default. Previously the default was to
403 JH/22 The smtp transport option "hosts_try_dane" now enables all hosts by
404 default. If built with the facility, DANE will be used. The facility
405 SUPPORT_DANE is now enabled in the prototype build Makefile "EDITME".
407 JH/23 The build default is now for TLS to be included; the SUPPORT_TLS define
408 is replaced with DISABLE_TLS. Either USE_GNUTLS or (the new) USE_OPENSSL
409 must be defined and you must still, unless you define DISABLE_TLS, manage
410 the the include-dir and library-file requirements that go with that
411 choice. Non-TLS builds are still supported.
413 JH/24 Fix duplicated logging of peer name/address, on a transport connection-
416 JH/25 The smtp transport option "hosts_try_fastopen" now enables all hosts by
417 default. If the platform supports and has the facility enabled, it will
418 be requested on all coneections.
420 JH/26 The PIPE_CONNECT facility is promoted from experimental status and is now
421 controlled by the build-time option SUPPORT_PIPE_CONNECT.
423 PP/01 Unbreak heimdal_gssapi, broken in 4.92.
425 JH/27 Bug 2404: Use the main-section configuration option "dsn_from" for
426 success-DSN messages. Previously the From: header was always the default
427 one for these; the option was ignored.
429 JH/28 Fix the timeout on smtp response to apply to the whole response.
430 Previously it was reset for every read, so a teergrubing peer sending
431 single bytes within the time limit could extend the connection for a
432 long time. Credit to Qualsys Security Advisory Team for the discovery.
434 JH/29 Fix DSN Final-Recipient: field. Previously it was the post-routing
435 delivery address, which leaked information of the results of local
436 forwarding. Change to the original envelope recipient address, per
439 JH/30 Bug 2411: Fix DSN generation when RFC 3461 failure notification is
440 requested. Previously not bounce was generated and a log entry of
441 error ignored was made.
443 JH/31 Avoid re-expansion in ${sort } expansion. (CVE-2019-13917)
445 JH/32 Introduce a general tainting mechanism for values read from the input
446 channel, and values derived from them. Refuse to expand any tainted
447 values, to catch one form of exploit.
449 JH/33 Bug 2413: Fix dkim_strict option. Previously the expansion result
450 was unused and the unexpanded text used for the test. Found and
451 fixed by Ruben Jenster.
453 JH/34 Fix crash after TLS shutdown. When the TCP/SMTP channel was left open,
454 an attempt to use a TLS library read routine dereffed a nul pointer,
457 JH/35 Bug 2409: filter out-of-spec chars from callout response before using
458 them in our smtp response.
460 JH/36 Have the general router option retry_use_local_part default to true when
461 any of the restrictive preconditions are set (to anything). Previously it
462 was only for check_local user. The change removes one item of manual
463 configuration which is required for proper retries when a remote router
464 handles a subset of addresses for a domain.
466 JH/37 Appendfile: when evaluating quota use (non-quota_size_regex) take the file
467 link count into consideration.
469 HS/04 Fix handling of very log lines in -H files. If a -<key> <value> line
470 caused the extension of big_buffer, the following lines were ignored.
472 JH/38 Bug 1395: Teach the DNS negative-cache about TTL value from the SOA in
473 accordance with RFC 2308. Previously there was no expiry, so a longlived
474 receive process (eg. due to ACL delays) versus a short SOA value could
477 HS/05 Handle trailing backslash gracefully. (CVE-2019-15846)
479 JH/39 Promote DMARC support to mainline.
481 JH/40 Bug 2452: Add a References: header to DSNs.
483 JH/41 With GnuTLS 3.6.0 (and later) do not attempt to manage Diffie-Hellman
484 parameters. The relevant library call is documented as "Deprecated: This
485 function is unnecessary and discouraged on GnuTLS 3.6.0 or later. Since
486 3.6.0, DH parameters are negotiated following RFC7919."
488 HS/06 Change the default of dnssec_request_domains to "*"
490 JH/42 Bug 2545: Fix CHUNKING for all RCPT commands rejected. Previously we
491 carried on and emitted a BDAT command, even when PIPELINING was not
494 JH/43 Bug 2465: Fix taint-handling in dsearch lookup. Previously a nontainted
495 buffer was used for the filename, resulting in a trap when tainted
496 arguments (eg. $domain) were used.
498 JH/44 With OpenSSL 1.1.1 (onwards) disable renegotiation for TLS1.2 and below;
499 recommended to avoid a possible server-load attack. The feature can be
500 re-enabled via the openssl_options main cofiguration option.
502 JH/45 local_scan API: documented the current smtp_printf() call. This changed
503 for version 4.90 - adding a "more data" boolean to the arguments.
504 Bumped the ABI version number also, this having been missed previously;
505 release versions 4.90 to 4.92.3 inclusive were effectively broken in
506 respect of usage of smtp_printf() by either local_scan code or libraries
507 accessed via the ${dlfunc } expansion item. Both will need coding
508 adjustment for any calls to smtp_printf() to match the new function
509 signature; a FALSE value for the new argument is always safe.
511 JH/46 FreeBSD: fix use of the sendfile() syscall. The shim was not updating
512 the file-offset (which the Linux syscall does, and exim expects); this
513 resulted in an indefinite loop.
515 JH/47 ARC: fix crash in signing, triggered when a configuration error failed
516 to do ARC verification. The Authentication-Results: header line added
517 by the configuration then had no ARC item.
523 JH/01 Remove code calling the customisable local_scan function, unless a new
524 definition "HAVE_LOCAL_SCAN=yes" is present in the Local/Makefile.
526 JH/02 Bug 1007: Avoid doing logging from signal-handlers, as that can result in
527 non-signal-safe functions being used.
529 JH/03 Bug 2269: When presented with a received message having a stupidly large
530 number of DKIM-Signature headers, disable DKIM verification to avoid
531 a resource-consumption attack. The limit is set at twenty.
533 JH/04 Add variables $arc_domains, $arc_oldest_pass for ARC verify. Fix the
534 report of oldest_pass in ${authres } in consequence, and separate out
535 some descriptions of reasons for verification fail.
537 JH/05 Bug 2273: Cutthrough delivery left a window where the received messsage
538 files in the spool were present and unlocked. A queue-runner could spot
539 them, resulting in a duplicate delivery. Fix that by doing the unlock
540 after the unlink. Investigation by Tim Stewart. Take the opportunity to
541 add more error-checking on spoolfile handling while that code is being
544 PP/01 Refuse to open a spool data file (*-D) if it's a symlink.
545 No known attacks, no CVE, this is defensive hardening.
547 JH/06 Bug 2275: The MIME ACL unlocked the received message files early, and
548 a queue-runner could start a delivery while other operations were ongoing.
549 Cutthrough delivery was a common victim, resulting in duplicate delivery.
550 Found and investigated by Tim Stewart. Fix by using the open message data
551 file handle rather than opening another, and not locally closing it (which
552 releases a lock) for that case, while creating the temporary .eml format
553 file for the MIME ACL. Also applies to "regex" and "spam" ACL conditions.
555 JH/07 Bug 177: Make a random-recipient callout success visible in ACL, by setting
556 $sender_verify_failure/$recipient_verify_failure to "random".
558 JH/08 When generating a selfsigned cert, use serial number 1 since zero is not
561 JH/09 Bug 2274: Fix logging of cmdline args when starting in an unlinked cwd.
562 Previously this would segfault.
564 JH/10 Fix ARC signing for case when DKIM signing failed. Previously this would
567 JH/11 Bug 2264: Exim now only follows CNAME chains one step by default. We'd
568 like zero, since the resolver should be doing this for us, But we need one
569 as a CNAME but no MX presence gets the CNAME returned; we need to check
570 that doesn't point to an MX to declare it "no MX returned" rather than
571 "error, loop". A new main option is added so the older capability of
572 following some limited number of chain links is maintained.
574 JH/12 Add client-ip info to non-pass iprev ${authres } lines.
576 JH/13 For receent Openssl versions (1.1 onward) use modern generic protocol
577 methods. These should support TLS 1.3; they arrived with TLS 1.3 and the
578 now-deprecated earlier definitions used only specified the range up to TLS
579 1.2 (in the older-version library docs).
581 JH/14 Bug 2284: Fix DKIM signing for body lines starting with a pair of dots.
583 JH/15 Rework TLS client-side context management. Stop using a global, and
584 explicitly pass a context around. This enables future use of TLS for
585 connections to service-daemons (eg. malware scanning) while a client smtp
586 connection is using TLS; with cutthrough connections this is quite likely.
588 JH/16 Fix ARC verification to do AS checks in reverse order.
590 JH/17 Support a "tls" option on the ${readsocket } expansion item.
592 JH/18 Bug 2287: Fix the protocol name (eg utf8esmtp) for multiple messages
593 using the SMTPUTF8 option on their MAIL FROM commands, in one connection.
594 Previously the "utf8" would be re-prepended for every additional message.
596 JH/19 Reject MAIL FROM commands with SMTPUTF8 when the facility was not advertised.
597 Previously thery were accepted, resulting in issues when attempting to
598 forward messages to a non-supporting MTA.
600 PP/02 Let -n work with printing macros too, not just options.
602 JH/20 Bug 2296: Fix cutthrough for >1 address redirection. Previously only
603 one parent address was copied, and bogus data was used at delivery-logging
604 time. Either a crash (after delivery) or bogus log data could result.
605 Discovery and analysis by Tim Stewart.
607 PP/03 Make ${utf8clean:} expansion operator detect incomplete final character.
608 Previously if the string ended mid-character, we did not insert the
609 promised '?' replacement.
611 PP/04 Documentation: current string operators work on bytes, not codepoints.
613 JH/21 Change as many as possible of the global flags into one-bit bitfields; these
614 should pack well giving a smaller memory footprint so better caching and
615 therefore performance. Group the declarations where this can't be done so
616 that the byte-sized flag variables are not interspersed among pointer
617 variables, giving a better chance of good packing by the compiler.
619 JH/22 Bug 1896: Fix the envelope from for DMARC forensic reports to be possibly
620 non-null, to avoid issues with sites running BATV. Previously reports were
621 sent with an empty envelope sender so looked like bounces.
623 JH/23 Bug 2318: Fix the noerror command within filters. It wasn't working.
624 The ignore_error flag wasn't being returned from the filter subprocess so
625 was not set for later routers. Investigation and fix by Matthias Kurz.
627 JH/24 Bug 2310: Raise a msg:fail:internal event for each undelivered recipient,
628 and a msg:complete for the whole, when a message is manually removed using
629 -Mrm. Developement by Matthias Kurz, hacked on by JH.
631 JH/25 Avoid fixed-size buffers for pathnames in DB access. This required using
632 a "Gnu special" function, asprintf() in the DB utility binary builds; I
633 hope that is portable enough.
635 JH/26 Bug 2311: Fix DANE-TA verification under GnuTLS. Previously it was also
636 requiring a known-CA anchor certificate; make it now rely entirely on the
637 TLSA as an anchor. Checking the name on the leaf cert against the name
638 on the A-record for the host is still done for TA (but not for EE mode).
640 JH/27 Fix logging of proxy address. Previously, a pointless "PRX=[]:0" would be
641 included in delivery lines for non-proxied connections, when compiled with
642 SUPPORT_SOCKS and running with proxy logging enabled.
644 JH/28 Bug 2314: Fire msg:fail:delivery event even when error is being ignored.
645 Developement by Matthias Kurz, tweaked by JH. While in that bit of code,
646 move the existing event to fire before the normal logging of message
647 failure so that custom logging is bracketed by normal logging.
649 JH/29 Bug 2322: A "fail" command in a non-system filter (file) now fires the
650 msg:fail:internal event. Developement by Matthias Kurz.
652 JH/30 Bug 2329: Increase buffer size used for dns lookup from 2k, which was
653 far too small for todays use of crypto signatures stored there. Go all
654 the way to the max DNS message size of 64kB, even though this might be
655 overmuch for IOT constrained device use.
657 JH/31 Fix a bad use of a copy function, which could be used to pointlessly
658 copy a string over itself. The library routine is documented as not
659 supporting overlapping copies, and on MacOS it actually raised a SIGABRT.
661 JH/32 For main options check_spool_space and check_inode_space, where the
662 platform supports 64b integers, support more than the previous 2^31 kB
663 (i.e. more than 2 TB). Accept E, P and T multipliers in addition to
664 the previous G, M, k.
666 JH/33 Bug 2338: Fix the cyrus-sasl authenticator to fill in the
667 $authenticated_fail_id variable on authentication failure. Previously
670 JH/34 Increase RSA keysize of autogen selfsign cert from 1024 to 2048. RHEL 8.0
671 OpenSSL didn't want to use such a weak key. Do for GnuTLS also, and for
672 more-modern GnuTLS move from GNUTLS_SEC_PARAM_LOW to
673 GNUTLS_SEC_PARAM_MEDIUM.
675 JH/35 OpenSSL: fail the handshake when SNI processing hits a problem, server
676 side. Previously we would continue as if no SNI had been received.
678 JH/36 Harden the handling of string-lists. When a list consisted of a sole
679 "<" character, which should be a list-separator specification, we walked
680 off past the nul-terimation.
682 JH/37 Bug 2341: Send "message delayed" warning MDNs (restricted to external
683 causes) even when the retry time is not yet met. Previously they were
684 not, meaning that when (say) an account was over-quota and temp-rejecting,
685 and multiple senders' messages were queued, only one sender would get
686 notified on each configured delay_warning cycle.
688 JH/38 Bug 2351: Log failures to extract envelope addresses from message headers.
690 JH/39 OpenSSL: clear the error stack after an SSL_accept(). With anon-auth
691 cipher-suites, an error can be left on the stack even for a succeeding
692 accept; this results in impossible error messages when a later operation
695 AM/01 Bug 2359: GnuTLS: repeat lowlevel read and write operations while they
696 return error codes indicating retry. Under TLS1.3 this becomes required.
698 JH/40 Fix the feature-cache refresh for EXPERIMENTAL_PIPE_CONNECT. Previously
699 it only wrote the new authenticators, resulting in a lack of tracking of
700 peer changes of ESMTP extensions until the next cache flush.
702 JH/41 Fix the loop reading a message header line to check for integer overflow,
703 and more-often against header_maxsize. Previously a crafted message could
704 induce a crash of the recive process; now the message is cleanly rejected.
706 JH/42 Bug 2366: Fix the behaviour of the dkim_verify_signers option. It had
707 been totally disabled for all of 4.91. Discovery and fix by "Mad Alex".
713 GF/01 DEFER rather than ERROR on redis cluster MOVED response.
714 When redis_servers is set to a list of > 1 element, and the Redis servers
715 in that list are in cluster configuration, convert the REDIS_REPLY_ERROR
716 case of MOVED into a DEFER case instead, thus moving the query onto the
717 next server in the list. For a cluster of N elements, all N servers must
718 be defined in redis_servers.
720 GF/02 Catch and remove uninitialized value warning in exiqsumm
721 Check for existence of @ARGV before looking at $ARGV[0]
723 JH/01 Replace the store_release() internal interface with store_newblock(),
724 which internalises the check required to safely use the old one, plus
725 the allocate and data copy operations duplicated in both (!) of the
726 extant use locations.
728 JH/02 Disallow '/' characters in queue names specified for the "queue=" ACL
729 modifier. This matches the restriction on the commandline.
731 JH/03 Fix pgsql lookup for multiple result-tuples with a single column.
732 Previously only the last row was returned.
734 JH/04 Bug 2217: Tighten up the parsing of DKIM signature headers. Previously
735 we assumed that tags in the header were well-formed, and parsed the
736 element content after inspecting only the first char of the tag.
737 Assumptions at that stage could crash the receive process on malformed
740 JH/05 Bug 2215: Fix crash associated with dnsdb lookup done from DKIM ACL.
741 While running the DKIM ACL we operate on the Permanent memory pool so that
742 variables created with "set" persist to the DATA ACL. Also (at any time)
743 DNS lookups that fail create cache records using the Permanent pool. But
744 expansions release any allocations made on the current pool - so a dnsdb
745 lookup expansion done in the DKIM ACL releases the memory used for the
746 DNS negative-cache, and bad things result. Solution is to switch to the
747 Main pool for expansions.
748 While we're in that code, add checks on the DNS cache during store_reset,
749 active in the testsuite.
750 Problem spotted, and debugging aided, by Wolfgang Breyha.
752 JH/06 Fix issue with continued-connections when the DNS shifts unreliably.
753 When none of the hosts presented to a transport match an already-open
754 connection, close it and proceed with the list. Previously we would
755 queue the message. Spotted by Lena with Yahoo, probably involving
758 JH/07 Bug 2214: Fix SMTP responses resulting from non-accept result of MIME ACL.
759 Previously a spurious "250 OK id=" response was appended to the proper
762 JH/08 The "support for" informational output now, which built with Content
763 Scanning support, has a line for the malware scanner interfaces compiled
764 in. Interface can be individually included or not at build time.
766 JH/09 The "aveserver", "kavdaemon" and "mksd" interfaces are now not included
767 by the template makefile "src/EDITME". The "STREAM" support for an older
768 ClamAV interface method is removed.
770 JH/10 Bug 2223: Fix mysql lookup returns for the no-data case (when the number of
771 rows affected is given instead).
773 JH/11 The runtime Berkeley DB library version is now additionally output by
774 "exim -d -bV". Previously only the compile-time version was shown.
776 JH/12 Bug 2230: Fix cutthrough routing for nonfirst messages in an initiating
777 SMTP connection. Previously, when one had more receipients than the
778 first, an abortive onward connection was made. Move to full support for
779 multiple onward connections in sequence, handling cutthrough connection
780 for all multi-message initiating connections.
782 JH/13 Bug 2229: Fix cutthrough routing for nonstandard port numbers defined by
783 routers. Previously, a multi-recipient message would fail to match the
784 onward-connection opened for the first recipient, and cause its closure.
786 JH/14 Bug 2174: A timeout on connect for a callout was also erroneously seen as
787 a timeout on read on a GnuTLS initiating connection, resulting in the
788 initiating connection being dropped. This mattered most when the callout
789 was marked defer_ok. Fix to keep the two timeout-detection methods
792 JH/15 Relax results from ACL control request to enable cutthrough, in
793 unsupported situations, from error to silently (except under debug)
794 ignoring. This covers use with PRDR, frozen messages, queue-only and
797 HS/01 Fix Buffer overflow in base64d() (CVE-2018-6789)
799 JH/16 Fix bug in DKIM verify: a buffer overflow could corrupt the malloc
800 metadata, resulting in a crash in free().
802 PP/01 Fix broken Heimdal GSSAPI authenticator integration.
803 Broken in f2ed27cf5, missing an equals sign for specified-initialisers.
804 Broken also in d185889f4, with init system revamp.
806 JH/17 Bug 2113: Fix conversation closedown with the Avast malware scanner.
807 Previously we abruptly closed the connection after reading a malware-
808 found indication; now we go on to read the "scan ok" response line,
811 JH/18 Bug 2239: Enforce non-usability of control=utf8_downconvert in the mail
812 ACL. Previously, a crash would result.
814 JH/19 Speed up macro lookups during configuration file read, by skipping non-
815 macro text after a replacement (previously it was only once per line) and
816 by skipping builtin macros when searching for an uppercase lead character.
818 JH/20 DANE support moved from Experimental to mainline. The Makefile control
819 for the build is renamed.
821 JH/21 Fix memory leak during multi-message connections using STARTTLS. A buffer
822 was allocated for every new TLS startup, meaning one per message. Fix
823 by only allocating once (OpenSSL) or freeing on TLS-close (GnuTLS).
825 JH/22 Bug 2236: When a DKIM verification result is overridden by ACL, DMARC
826 reported the original. Fix to report (as far as possible) the ACL
827 result replacing the original.
829 JH/23 Fix memory leak during multi-message connections using STARTTLS under
830 OpenSSL. Certificate information is loaded for every new TLS startup,
831 and the resources needed to be freed.
833 JH/24 Bug 2242: Fix exim_dbmbuild to permit directoryless filenames.
835 JH/25 Fix utf8_downconvert propagation through a redirect router. Previously it
838 JH/26 Bug 2253: For logging delivery lines under PRDR, append the overall
839 DATA response info to the (existing) per-recipient response info for
840 the "C=" log element. It can have useful tracking info from the
841 destination system. Patch from Simon Arlott.
843 JH/27 Bug 2251: Fix ldap lookups that return a single attribute having zero-
844 length value. Previously this would segfault.
846 HS/02 Support Avast multiline protoocol, this allows passing flags to
847 newer versions of the scanner.
849 JH/28 Ensure that variables possibly set during message acceptance are marked
850 dead before release of memory in the daemon loop. This stops complaints
851 about them when the debug_store option is enabled. Discovered specifically
852 for sender_rate_period, but applies to a whole set of variables.
853 Do the same for the queue-runner and queue-list loops, for variables set
854 from spool message files. Do the same for the SMTP per-message loop, for
855 certain variables indirectly set in ACL operations.
857 JH/29 Bug 2250: Fix a longstanding bug in heavily-pipelined SMTP input (such
858 as a multi-recipient message from a mailinglist manager). The coding had
859 an arbitrary cutoff number of characters while checking for more input;
860 enforced by writing a NUL into the buffer. This corrupted long / fast
861 input. The problem was exposed more widely when more pipelineing of SMTP
862 responses was introduced, and one Exim system was feeding another.
863 The symptom is log complaints of SMTP syntax error (NUL chars) on the
864 receiving system, and refused recipients seen by the sending system
865 (propating to people being dropped from mailing lists).
866 Discovered and pinpointed by David Carter.
868 JH/30 The (EXPERIMENTAL_DMARC) variable $dmarc_ar_header is withdrawn, being
869 replaced by the ${authresults } expansion.
871 JH/31 Bug 2257: Fix pipe transport to not use a socket-only syscall.
873 HS/03 Set a handler for SIGTERM and call exit(3) if running as PID 1. This
874 allows proper process termination in container environments.
876 JH/32 Bug 2258: Fix spool_wireformat in combination with LMTP transport.
877 Previously the "final dot" had a newline after it; ensure it is CR,LF.
879 JH/33 SPF: remove support for the "spf" ACL condition outcome values "err_temp"
880 and "err_perm", deprecated since 4.83 when the RFC-defined words
881 "temperror" and "permerror" were introduced.
883 JH/34 Re-introduce enforcement of no cutthrough delivery on transports having
884 transport-filters or DKIM-signing. The restriction was lost in the
885 consolidation of verify-callout and delivery SMTP handling.
886 Extend the restriction to also cover ARC-signing.
888 JH/35 Cutthrough: for a final-dot response timeout (and nonunderstood responses)
889 in defer=pass mode supply a 450 to the initiator. Previously the message
892 PP/02 DANE: add dane_require_tls_ciphers SMTP Transport option; if unset,
893 tls_require_ciphers is used as before.
895 HS/03 Malware Avast: Better match the Avast multiline protocol. Add
896 "pass_unscanned". Only tmpfails from the scanner are written to
897 the paniclog, as they may require admin intervention (permission
898 denied, license issues). Other scanner errors (like decompression
899 bombs) do not cause a paniclog entry.
901 JH/36 Fix reinitialisation of DKIM logging variable between messages.
902 Previously it was possible to log spurious information in receive log
905 JH/37 Bug 2255: Revert the disable of the OpenSSL session caching. This
906 triggered odd behaviour from Outlook Express clients.
908 PP/03 Add util/renew-opendmarc-tlds.sh script for safe renewal of public
911 JH/38 DKIM: accept Ed25519 pubkeys in SubjectPublicKeyInfo-wrapped form,
912 since the IETF WG has not yet settled on that versus the original
913 "bare" representation.
915 JH/39 Fix syslog logging for syslog_timestamp=no and log_selector +millisec.
916 Previously the millisecond value corrupted the output.
917 Fix also for syslog_pid=no and log_selector +pid, for which the pid
918 corrupted the output.
924 JH/01 Rework error string handling in TLS interface so that the caller in
925 more cases is responsible for logging. This permits library-sourced
926 string to be attached to addresses during delivery, and collapses
927 pairs of long lines into single ones.
929 PP/01 Allow PKG_CONFIG_PATH to be set in Local/Makefile and use it correctly
930 during configuration. Wildcards are allowed and expanded.
932 JH/02 Rework error string handling in DKIM to pass more info back to callers.
933 This permits better logging.
935 JH/03 Rework the transport continued-connection mechanism: when TLS is active,
936 do not close it down and have the child transport start it up again on
937 the passed-on TCP connection. Instead, proxy the child (and any
938 subsequent ones) for TLS via a unix-domain socket channel. Logging is
939 affected: the continued delivery log lines do not have any DNSSEC, TLS
940 Certificate or OCSP information. TLS cipher information is still logged.
942 JH/04 Shorten the log line for daemon startup by collapsing adjacent sets of
943 identical IP addresses on different listening ports. Will also affect
946 PP/02 Bug 2070: uClibc defines __GLIBC__ without providing glibc headers;
947 add noisy ifdef guards to special-case this sillyness.
948 Patch from Bernd Kuhls.
950 JH/05 Tighten up the checking in isip4 (et al): dotted-quad components larger
951 than 255 are no longer allowed.
953 JH/06 Default openssl_options to include +no_ticket, to reduce load on peers.
954 Disable the session-cache too, which might reduce our load. Since we
955 currrectly use a new context for every connection, both as server and
956 client, there is no benefit for these.
957 GnuTLS appears to not support tickets server-side by default (we don't
958 call gnutls_session_ticket_enable_server()) but client side is enabled
959 by default on recent versions (3.1.3 +) unless the PFS priority string
962 PP/03 Add $SOURCE_DATE_EPOCH support for reproducible builds, per spec at
963 <https://reproducible-builds.org/specs/source-date-epoch/>.
965 JH/07 Fix smtp transport use of limited max_rcpt under mua_wrapper. Previously
966 the check for any unsuccessful recipients did not notice the limit, and
967 erroneously found still-pending ones.
969 JH/08 Pipeline CHUNKING command and data together, on kernels that support
970 MSG_MORE. Only in-clear (not on TLS connections).
972 JH/09 Avoid using a temporary file during transport using dkim. Unless a
973 transport-filter is involved we can buffer the headers in memory for
974 creating the signature, and read the spool data file once for the
975 signature and again for transmission.
977 JH/10 Enable use of sendfile in Linux builds as default. It was disabled in
978 4.77 as the kernel support then wasn't solid, having issues in 64bit
979 mode. Now, it's been long enough. Add support for FreeBSD also.
981 JH/11 Bug 2104: Fix continued use of a transport connection with TLS. In the
982 case where the routing stage had gathered several addresses to send to
983 a host before calling the transport for the first, we previously failed
984 to close down TLS in the old transport process before passing the TCP
985 connection to the new process. The new one sent a STARTTLS command
986 which naturally failed, giving a failed delivery and bloating the retry
987 database. Investigation and fix prototype from Wolfgang Breyha.
989 JH/12 Fix check on SMTP command input synchronisation. Previously there were
990 false-negatives in the check that the sender had not preempted a response
991 or prompt from Exim (running as a server), due to that code's lack of
992 awareness of the SMTP input buffering.
994 PP/04 Add commandline_checks_require_admin option.
995 Exim drops privileges sanely, various checks such as -be aren't a
996 security problem, as long as you trust local users with access to their
997 own account. When invoked by services which pass untrusted data to
998 Exim, this might be an issue. Set this option in main configuration
999 AND make fixes to the calling application, such as using `--` to stop
1002 JH/13 Do pipelining under TLS. Previously, although safe, no advantage was
1003 taken. Now take care to pack both (client) MAIL,RCPT,DATA, and (server)
1004 responses to those, into a single TLS record each way (this usually means
1005 a single packet). As a side issue, smtp_enforce_sync now works on TLS
1008 PP/05 OpenSSL/1.1: use DH_bits() for more accurate DH param sizes. This
1009 affects you only if you're dancing at the edge of the param size limits.
1010 If you are, and this message makes sense to you, then: raise the
1011 configured limit or use OpenSSL 1.1. Nothing we can do for older
1014 JH/14 For the "sock" variant of the malware scanner interface, accept an empty
1015 cmdline element to get the documented default one. Previously it was
1018 JH/15 Fix a crash in the smtp transport caused when two hosts in succession
1019 are unsuable for non-message-specific reasons - eg. connection timeout,
1020 banner-time rejection.
1022 JH/16 Fix logging of delivery remote port, when specified by router, under
1025 PP/06 Repair manualroute's ability to take options in any order, even if one
1026 is the name of a transport.
1029 HS/01 Cleanup, prevent repeated use of -p/-oMr (CVE-2017-1000369)
1031 JH/17 Change the list-building routines interface to use the expanding-string
1032 triplet model, for better allocation and copying behaviour.
1034 JH/18 Prebuild the data-structure for "builtin" macros, for faster startup.
1035 Previously it was constructed the first time a possibly-matching string
1036 was met in the configuration file input during startup; now it is done
1039 JH/19 Bug 2141: Use the full-complex API for Berkeley DB rather than the legacy-
1040 compatible one, to avoid the (poorly documented) possibility of a config
1041 file in the working directory redirecting the DB files, possibly correpting
1042 some existing file. CVE-2017-10140 assigned for BDB.
1044 JH/20 Bug 2147: Do not defer for a verify-with-callout-and-random which is not
1045 cache-hot. Previously, although the result was properly cached, the
1046 initial verify call returned a defer.
1048 JH/21 Bug 2151: Avoid using SIZE on the MAIL for a callout verify, on any but
1049 the main verify for receipient in uncached-mode.
1051 JH/22 Retire historical build files to an "unsupported" subdir. These are
1052 defined as "ones for which we have no current evidence of testing".
1054 JH/23 DKIM: enforce the DNS pubkey record "h" permitted-hashes optional field,
1055 if present. Previously it was ignored.
1057 JH/24 Start using specified-initialisers in C structure init coding. This is
1058 a C99 feature (it's 2017, so now considered safe).
1060 JH/25 Use one-bit bitfields for flags in the "addr" data structure. Previously
1061 if was a fixed-sized field and bitmask ops via macros; it is now more
1064 PP/07 GitHub PR 56: Apply MariaDB build fix.
1065 Patch provided by Jaroslav Škarvada.
1067 PP/08 Bug 2161: Fix regression in sieve quoted-printable handling introduced
1068 during Coverity cleanups [4.87 JH/47]
1069 Diagnosis and fix provided by Michael Fischer v. Mollard.
1071 JH/26 Fix DKIM bug: when the pseudoheader generated for signing was exactly
1072 the right size to place the terminating semicolon on its own folded
1073 line, the header hash was calculated to an incorrect value thanks to
1074 the (relaxed) space the fold became.
1076 HS/02 Fix Bug 2130: large writes from the transport subprocess were chunked
1077 and confused the parent.
1079 JH/27 Fix SOCKS bug: an unitialized pointer was deref'd by the transport process
1080 which could crash as a result. This could lead to undeliverable messages.
1082 JH/28 Logging: "next input sent too soon" now shows where input was truncated
1085 JH/29 Fix queue_run_in_order to ignore the PID portion of the message ID. This
1086 matters on fast-turnover and PID-randomising systems, which were getting
1087 out-of-order delivery.
1089 JH/30 Fix a logging bug on aarch64: an unsafe routine was previously used for
1090 a possibly-overlapping copy. The symptom was that "Remote host closed
1091 connection in response to HELO" was logged instead of the actual 4xx
1094 JH/31 Fix CHUNKING code to properly flush the unwanted chunk after an error.
1095 Previously only that bufferd was discarded, resulting in SYMTP command
1098 JH/32 DKIM: when a message has multiple signatures matching an identity given
1099 in dkim_verify_signers, run the dkim acl once for each. Previously only
1100 one run was done. Bug 2189.
1102 JH/33 Downgrade an unfound-list name (usually a typo in the config file) from
1103 "panic the current process" to "deliberately defer". The panic log is
1104 still written with the problem list name; the mail and reject logs now
1105 get a temp-reject line for the message that was being handled, saying
1106 something like "domains check lookup or other defer". The SMTP 451
1107 message is still "Temporary local problem".
1109 JH/34 Bug 2199: Fix a use-after-free while reading smtp input for header lines.
1110 A crafted sequence of BDAT commands could result in in-use memory beeing
1111 freed. CVE-2017-16943.
1113 HS/03 Bug 2201: Fix checking for leading-dot on a line during headers reading
1114 from SMTP input. Previously it was always done; now only done for DATA
1115 and not BDAT commands. CVE-2017-16944.
1117 JH/35 Bug 2201: Flush received data in BDAT mode after detecting an error fatal
1118 to the message (such as an overlong header line). Previously this was
1119 not done and we did not exit BDAT mode. Followon from the previous item
1120 though a different problem.
1126 JH/01 Bug 1922: Support IDNA2008. This has slightly different conversion rules
1127 than -2003 did; needs libidn2 in addition to libidn.
1129 JH/02 The path option on a pipe transport is now expanded before use.
1131 PP/01 GitHub PR 50: Do not call ldap_start_tls_s on ldapi:// connections.
1132 Patch provided by "Björn", documentation fix added too.
1134 JH/03 Bug 2003: fix Proxy Protocol v2 handling: the address size field was
1135 missing a wire-to-host endian conversion.
1137 JH/04 Bug 2004: fix CHUNKING in non-PIPELINEING mode. Chunk data following
1138 close after a BDAT command line could be taken as a following command,
1139 giving a synch failure. Fix by only checking for synch immediately
1140 before acknowledging the chunk.
1142 PP/02 GitHub PR 52: many spelling fixes, which include fixing parsing of
1143 no_require_dnssec option and creation of _HAVE_TRANSPORT_APPEND_MAILDIR
1144 macro. Patches provided by Josh Soref.
1146 JH/05 Have the EHLO response advertise VRFY, if there is a vrfy ACL defined.
1147 Previously we did not; the RFC seems ambiguous and VRFY is not listed
1148 by IANA as a service extension. However, John Klensin suggests that we
1151 JH/06 Bug 2017: Fix DKIM verification in -bh test mode. The data feed into
1152 the dkim code may be unix-mode line endings rather than smtp wire-format
1153 CRLF, so prepend a CR to any bare LF.
1155 JH/07 Rationalise the coding for callout smtp conversations and transport ones.
1156 As a side-benfit, callouts can now use PIPELINING hence fewer round-trips.
1158 JH/08 Bug 2016: Fix DKIM verification vs. CHUNKING. Any BDAT commands after
1159 the first were themselves being wrongly included in the feed into dkim
1160 processing; with most chunk sizes in use this resulted in an incorrect
1161 body hash calculated value.
1163 JH/09 Bug 2014: permit inclusion of a DKIM-Signature header in a received
1164 DKIM signature block, for verification. Although advised against by
1165 standards it is specifically not ruled illegal.
1167 JH/10 Bug 2025: Fix reception of (quoted) local-parts with embedded spaces.
1169 JH/11 Bug 2029: Fix crash in DKIM verification when a message signature block is
1170 missing a body hash (the bh= tag).
1172 JH/12 Bug 2018: Re-order Proxy Protocol startup versus TLS-on-connect startup.
1173 It seems that HAProxy sends the Proxy Protocol information in clear and
1174 only then does a TLS startup, so do the same.
1176 JH/13 Bug 2027: Avoid attempting to use TCP Fast Open for non-transport client
1177 TCP connections (such as for Spamd) unless the daemon successfully set
1178 Fast Open mode on its listening sockets. This fixes breakage seen on
1179 too-old kernels or those not configured for Fast Open, at the cost of
1180 requiring both directions being enabled for TFO, and TFO never being used
1181 by non-daemon-related Exim processes.
1183 JH/14 Bug 2000: Reject messages recieved with CHUNKING but with malformed line
1184 endings, at least on the first header line. Try to canonify any that get
1185 past that check, despite the cost.
1187 JH/15 Angle-bracket nesting (an error inserted by broken sendmails) levels are
1188 now limited to an arbitrary five deep, while parsing addresses with the
1189 strip_excess_angle_brackets option enabled.
1191 PP/03 Bug 2018: For Proxy Protocol and TLS-on-connect, do not over-read and
1192 instead leave the unprompted TLS handshake in socket buffer for the
1193 TLS library to consume.
1195 PP/04 Bug 2018: Also handle Proxy Protocol v2 safely.
1197 PP/05 FreeBSD compat: handle that Ports no longer create /usr/bin/perl
1199 JH/16 Drop variables when they go out of scope. Memory management drops a whole
1200 region in one operation, for speed, and this leaves assigned pointers
1201 dangling. Add checks run only under the testsuite which checks all
1202 variables at a store-reset and panics on a dangling pointer; add code
1203 explicitly nulling out all the variables discovered. Fixes one known
1204 bug: a transport crash, where a dangling pointer for $sending_ip_address
1205 originally assigned in a verify callout, is re-used.
1207 PP/06 Drop '.' from @INC in various Perl scripts.
1209 PP/07 Switch FreeBSD iconv to always use the base-system libc functions.
1211 PP/08 Reduce a number of compilation warnings under clang; building with
1212 CC=clang CFLAGS+=-Wno-dangling-else -Wno-logical-op-parentheses
1213 should be warning-free.
1215 JH/17 Fix inbound CHUNKING when DKIM disabled at runtime.
1217 HS/01 Fix portability problems introduced by PP/08 for platforms where
1218 realloc(NULL) is not equivalent to malloc() [SunOS et al].
1220 HS/02 Bug 1974: Fix missing line terminator on the last received BDAT
1221 chunk. This allows us to accept broken chunked messages. We need a more
1222 general solution here.
1224 PP/09 Wrote util/chunking_fixqueue_finalnewlines.pl to help recover
1225 already-broken messages in the queue.
1227 JH/18 Bug 2061: Fix ${extract } corrupting an enclosing ${reduce } $value.
1229 JH/19 Fix reference counting bug in routing-generated-address tracking.
1235 JH/01 Use SIZE on MAIL FROM in a cutthrough connection, if the destination
1236 supports it and a size is available (ie. the sending peer gave us one).
1238 JH/02 The obsolete acl condition "demime" is removed (finally, after ten
1239 years of being deprecated). The replacements are the ACLs
1240 acl_smtp_mime and acl_not_smtp_mime.
1242 JH/03 Upgrade security requirements imposed for hosts_try_dane: previously
1243 a downgraded non-dane trust-anchor for the TLS connection (CA-style)
1244 or even an in-clear connection were permitted. Now, if the host lookup
1245 was dnssec and dane was requested then the host is only used if the
1246 TLSA lookup succeeds and is dnssec. Further hosts (eg. lower priority
1247 MXs) will be tried (for hosts_try_dane though not for hosts_require_dane)
1248 if one fails this test.
1249 This means that a poorly-configured remote DNS will make it incommunicado;
1250 but it protects against a DNS-interception attack on it.
1252 JH/04 Bug 1810: make continued-use of an open smtp transport connection
1253 non-noisy when a race steals the message being considered.
1255 JH/05 If main configuration option tls_certificate is unset, generate a
1256 self-signed certificate for inbound TLS connections.
1258 JH/06 Bug 165: hide more cases of password exposure - this time in expansions
1259 in rewrites and routers.
1261 JH/07 Retire gnutls_require_mac et.al. These were nonfunctional since 4.80
1262 and logged a warning sing 4.83; now they are a configuration file error.
1264 JH/08 Bug 1836: Fix crash in VRFY handling when handed an unqualified name
1265 (lacking @domain). Apply the same qualification processing as RCPT.
1267 JH/09 Bug 1804: Avoid writing msglog files when in -bh or -bhc mode.
1269 JH/10 Support ${sha256:} applied to a string (as well as the previous
1272 JH/11 Cutthrough: avoid using the callout hints db on a verify callout when
1273 a cutthrough deliver is pending, as we always want to make a connection.
1274 This also avoids re-routing the message when later placing the cutthrough
1275 connection after a verify cache hit.
1276 Do not update it with the verify result either.
1278 JH/12 Cutthrough: disable when verify option success_on_redirect is used, and
1279 when routing results in more than one destination address.
1281 JH/13 Cutthrough: expand transport dkim_domain option when testing for dkim
1282 signing (which inhibits the cutthrough capability). Previously only
1283 the presence of an option was tested; now an expansion evaluating as
1284 empty is permissible (obviously it should depend only on data available
1285 when the cutthrough connection is made).
1287 JH/14 Fix logging of errors under PIPELINING. Previously the log line giving
1288 the relevant preceding SMTP command did not note the pipelining mode.
1290 JH/15 Fix counting of empty lines in $body_linecount and $message_linecount.
1291 Previously they were not counted.
1293 JH/16 DANE: treat a TLSA lookup response having all non-TLSA RRs, the same
1294 as one having no matching records. Previously we deferred the message
1295 that needed the lookup.
1297 JH/17 Fakereject: previously logged as a normal message arrival "<="; now
1298 distinguished as "(=".
1300 JH/18 Bug 1867: make the fail_defer_domains option on a dnslookup router work
1301 for missing MX records. Previously it only worked for missing A records.
1303 JH/19 Bug 1850: support Radius libraries that return REJECT_RC.
1305 JH/20 Bug 1872: Ensure that acl_smtp_notquit is run when the connection drops
1306 after the data-go-ahead and data-ack. Patch from Jason Betts.
1308 JH/21 Bug 1846: Send DMARC forensic reports for reject and quarantine results,
1309 even for a "none" policy. Patch from Tony Meyer.
1311 JH/22 Fix continued use of a connection for further deliveries. If a port was
1312 specified by a router, it must also match for the delivery to be
1315 JH/23 Bug 1874: fix continued use of a connection for further deliveries.
1316 When one of the recipients of a message was unsuitable for the connection
1317 (has no matching addresses), we lost track of needing to mark it
1318 deferred. As a result mail would be lost.
1320 JH/24 Bug 1832: Log EHLO response on getting conn-close response for HELO.
1322 JH/25 Decoding ACL controls is now done using a binary search; the source code
1323 takes up less space and should be simpler to maintain. Merge the ACL
1324 condition decode tables also, with similar effect.
1326 JH/26 Fix problem with one_time used on a redirect router which returned the
1327 parent address unchanged. A retry would see the parent address marked as
1328 delivered, so not attempt the (identical) child. As a result mail would
1331 JH/27 Fix a possible security hole, wherein a process operating with the Exim
1332 UID can gain a root shell. Credit to http://www.halfdog.net/ for
1333 discovery and writeup. Ubuntu bug 1580454; no bug raised against Exim
1336 JH/28 Enable {spool,log} filesystem space and inode checks as default.
1337 Main config options check_{log,spool}_{inodes,space} are now
1338 100 inodes, 10MB unless set otherwise in the configuration.
1340 JH/29 Fix the connection_reject log selector to apply to the connect ACL.
1341 Previously it only applied to the main-section connection policy
1344 JH/30 Bug 1897: fix callouts connection fallback from TLS to cleartext.
1346 PP/01 Changed default Diffie-Hellman parameters to be Exim-specific, created
1347 by me. Added RFC7919 DH primes as an alternative.
1349 PP/02 Unbreak build via pkg-config with new hash support when crypto headers
1350 are not in the system include path.
1352 JH/31 Fix longstanding bug with aborted TLS server connection handling. Under
1353 GnuTLS, when a session startup failed (eg because the client disconnected)
1354 Exim did stdio operations after fclose. This was exposed by a recent
1355 change which nulled out the file handle after the fclose.
1357 JH/32 Bug 1909: Fix OCSP proof verification for cases where the proof is
1358 signed directly by the cert-signing cert, rather than an intermediate
1359 OCSP-signing cert. This is the model used by LetsEncrypt.
1361 JH/33 Bug 1914: Ensure socket is nonblocking before draining after SMTP QUIT.
1363 HS/01 Fix leak in verify callout under GnuTLS, about 3MB per recipient on
1364 an incoming connection.
1366 HS/02 Bug 1802: Do not half-close the connection after sending a request
1369 HS/03 Use "auto" as the default EC curve parameter. For OpenSSL < 1.0.2
1370 fallback to "prime256v1".
1372 JH/34 SECURITY: Use proper copy of DATA command in error message.
1373 Could leak key material. Remotely exploitable. CVE-2016-9963.
1379 JH/01 Bug 1664: Disable OCSP for GnuTLS library versions at/before 3.3.16
1380 and 3.4.4 - once the server is enabled to respond to an OCSP request
1381 it does even when not requested, resulting in a stapling non-aware
1382 client dropping the TLS connection.
1384 TF/01 Code cleanup: Overhaul the debug_selector and log_selector machinery to
1385 support variable-length bit vectors. No functional change.
1387 TF/02 Improve the consistency of logging incoming and outgoing interfaces.
1388 The I= interface field on outgoing lines is now after the H= remote
1389 host field, same as incoming lines. There is a separate
1390 outgoing_interface log selector which allows you to disable the
1393 JH/02 Bug 728: Close logfiles after a daemon-process "exceptional" log write.
1394 If not running log_selector +smtp_connection the mainlog would be held
1395 open indefinitely after a "too many connections" event, including to a
1396 deleted file after a log rotate. Leave the per net connection logging
1397 leaving it open for efficiency as that will be quickly detected by the
1398 check on the next write.
1400 HS/01 Bug 1671: Fix post transport crash.
1401 Processing the wait-<transport> messages could crash the delivery
1402 process if the message IDs didn't exist for some reason. When
1403 using 'split_spool_directory=yes' the construction of the spool
1404 file name failed already, exposing the same netto behaviour.
1406 JH/03 Bug 425: Capture substrings in $regex1, $regex2 etc from regex &
1407 mime_regex ACL conditions.
1409 JH/04 Bug 1686: When compiled with EXPERIMENTAL_DSN_INFO: Add extra information
1410 to DSN fail messages (bounces): remote IP, remote greeting, remote response
1411 to HELO, local diagnostic string.
1413 JH/05 Downgrade message for a TLS-certificate-based authentication fail from
1414 log line to debug. Even when configured with a tls authenticator many
1415 client connections are expected to not authenticate in this way, so
1416 an authenticate fail is not an error.
1418 HS/02 Add the Exim version string to the process info. This way exiwhat
1419 gives some more detail about the running daemon.
1421 JH/06 Bug 1395: time-limit caching of DNS lookups, to the TTL value. This may
1422 matter for fast-change records such as DNSBLs.
1424 JH/07 Bug 1678: Always record an interface option value, if set, as part of a
1425 retry record, even if constant. There may be multiple transports with
1426 different interface settings and the retry behaviour needs to be kept
1429 JH/08 Bug 1586: exiqgrep now refuses to run if there are unexpected arguments.
1431 JH/09 Bug 1700: ignore space & tab embedded in base64 during decode.
1433 JH/10 Bug 840: fix log_defer_output option of pipe transport
1435 JH/11 Bug 830: use same host for all RCPTS of a message, even under
1436 hosts_randomize. This matters a lot when combined with mua_wrapper.
1438 JH/12 Bug 1706: percent and underbar characters are no longer escaped by the
1439 ${quote_pgsql:<string>} operator.
1441 JH/13 Bug 1708: avoid misaligned access in cached lookup.
1443 JH/14 Change header file name for freeradius-client. Relevant if compiling
1444 with Radius support; from the Gentoo tree and checked under Fedora.
1446 JH/15 Bug 1712: Introduce $prdr_requested flag variable
1448 JH/16 Bug 1714: Permit an empty string as expansion result for transport
1449 option transport_filter, meaning no filtering.
1451 JH/17 Bug 1713: Fix non-PDKIM_DEBUG build. Patch from Jasen Betts.
1453 JH/18 Bug 1709: When built with TLS support, the tls_advertise_hosts option now
1454 defaults to "*" (all hosts). The variable is now available when not built
1455 with TLS, default unset, mainly to enable keeping the testsuite sane.
1456 If a server certificate is not supplied (via tls_certificate) an error is
1457 logged, and clients will find TLS connections fail on startup. Presumably
1458 they will retry in-clear.
1459 Packagers of Exim are strongly encouraged to create a server certificate
1460 at installation time.
1462 HS/03 Add -bP config_file as a synonym for -bP configure_file, for consistency
1463 with the $config_file variable.
1465 JH/19 Two additional event types: msg:rcpt:defer and msg:rcpt:host:defer. Both
1466 in transport context, after the attempt, and per-recipient. The latter type
1467 is per host attempted. The event data is the error message, and the errno
1468 information encodes the lookup type (A vs. MX) used for the (first) host,
1469 and the trailing two digits of the smtp 4xx response.
1471 GF/01 Bug 1715: Fix for race condition in exicyclog, where exim could attempt
1472 to write to mainlog (or rejectlog, paniclog) in the window between file
1473 creation and permissions/ownership being changed. Particularly affects
1474 installations where exicyclog is run as root, rather than exim user;
1475 result is that the running daemon panics and dies.
1477 JH/20 Bug 1701: For MySQL lookups, support MySQL config file option group names.
1479 JH/21 Bug 1720: Add support for priority groups and weighted-random proxy
1480 selection for the EXPERIMENTAL_SOCKS feature, via new per-proxy options
1481 "pri" and "weight". Note that the previous implicit priority given by the
1482 list order is no longer honoured.
1484 JH/22 Bugs 963, 1721: Fix some corner cases in message body canonicalization
1485 for DKIM processing.
1487 JH/23 Move SOCKS5 support from Experimental to mainline, enabled for a build
1488 by defining SUPPORT_SOCKS.
1490 JH/26 Move PROXY support from Experimental to mainline, enabled for a build
1491 by defining SUPPORT_PROXY. Note that the proxy_required_hosts option
1492 is renamed to hosts_proxy, and the proxy_{host,target}_{address,port}.
1493 variables are renamed to proxy_{local,external}_{address,port}.
1495 JH/27 Move Internationalisation support from Experimental to mainline, enabled
1496 for a build by defining SUPPORT_I18N
1498 JH/28 Bug 1745: Fix redis lookups to handle (quoted) spaces embedded in parts
1499 of the query string, and make ${quote_redis:} do that quoting.
1501 JH/29 Move Events support from Experimental to mainline, enabled by default
1502 and removable for a build by defining DISABLE_EVENT.
1504 JH/30 Updated DANE implementation code to current from Viktor Dukhovni.
1506 JH/31 Fix bug with hosts_connection_nolog and named-lists which were wrongly
1507 cached by the daemon.
1509 JH/32 Move Redis support from Experimental to mainline, enabled for a build
1510 by defining LOOKUP_REDIS. The libhiredis library is required.
1512 JH/33 Bug 1748: Permit ACL dnslists= condition in non-smtp ACLs if explicit
1513 keys are given for lookup.
1515 JH/34 Bug 1192: replace the embedded copy of PolarSSL RSA routines in the DKIM
1516 support, by using OpenSSL or GnuTLS library ones. This means DKIM is
1517 only supported when built with TLS support. The PolarSSL SHA routines
1518 are still used when the TLS library is too old for convenient support.
1520 JH/35 Require SINGLE_DH_USE by default in OpenSSL (main config option
1521 openssl_options), for security. OpenSSL forces this from version 1.1.0
1522 server-side so match that on older versions.
1524 JH/36 Bug 1778: longstanding bug in memory use by the ${run } expansion: A fresh
1525 allocation for $value could be released as the expansion processing
1526 concluded, but leaving the global pointer active for it.
1528 JH/37 Bug 1769: Permit a VRFY ACL to override the default 252 response,
1529 and to use the domains and local_parts ACL conditions.
1531 JH/38 Fix cutthrough bug with body lines having a single dot. The dot was
1532 incorrectly not doubled on cutthrough transmission, hence seen as a
1533 body-termination at the receiving system - resulting in truncated mails.
1534 Commonly the sender saw a TCP-level error, and retransmitted the message
1535 via the normal store-and-forward channel. This could result in duplicates
1536 received - but deduplicating mailstores were liable to retain only the
1537 initial truncated version.
1539 JH/39 Bug 1781: Fix use of DKIM private-keys having trailing '=' in the base-64.
1541 JH/40 Fix crash in queryprogram router when compiled with EXPERIMENTAL_SRS.
1543 JH/41 Bug 1792: Fix selection of headers to sign for DKIM: bottom-up. While
1544 we're in there, support oversigning also; bug 1309.
1546 JH/42 Bug 1796: Fix error logged on a malware scanner connection failure.
1548 HS/04 Add support for keep_environment and add_environment options.
1550 JH/43 Tidy coding issues detected by gcc --fsanitize=undefined. Some remain;
1551 either intentional arithmetic overflow during PRNG, or testing config-
1554 JH/44 Bug 1800: The combination of a -bhc commandline option and cutthrough
1555 delivery resulted in actual delivery. Cancel cutthrough before DATA
1558 JH/45 Fix cutthrough, when connection not opened by verify and target hard-
1559 rejects a recipient: pass the reject to the originator.
1561 JH/46 Multiple issues raised by Coverity. Some were obvious or plausible bugs.
1562 Many were false-positives and ignorable, but it's worth fixing the
1565 JH/47 Fix build on HP-UX and older Solaris, which need (un)setenv now also
1566 for the new environment-manipulation done at startup. Move the routines
1567 from being local to tls.c to being global via the os.c file.
1569 JH/48 Bug 1807: Fix ${extract } for the numeric/3-string case. While preparsing
1570 an extract embedded as result-arg for a map, the first arg for extract
1571 is unavailable so we cannot tell if this is a numbered or keyed
1572 extraction. Accept either.
1578 JH/01 Bug 1545: The smtp transport option "retry_include_ip_address" is now
1581 JH/02 The smtp transport option "multi_domain" is now expanded.
1583 JH/03 The smtp transport now requests PRDR by default, if the server offers
1586 JH/04 Certificate name checking on server certificates, when exim is a client,
1587 is now done by default. The transport option tls_verify_cert_hostnames
1588 can be used to disable this per-host. The build option
1589 EXPERIMENTAL_CERTNAMES is withdrawn.
1591 JH/05 The value of the tls_verify_certificates smtp transport and main options
1592 default to the word "system" to access the system default CA bundle.
1593 For GnuTLS, only version 3.0.20 or later.
1595 JH/06 Verification of the server certificate for a TLS connection is now tried
1596 (but not required) by default. The verification status is now logged by
1597 default, for both outbound TLS and client-certificate supplying inbound
1600 JH/07 Changed the default rfc1413 lookup settings to disable calls. Few
1603 JH/08 The EXPERIMENTAL_DSN compile option is no longer needed; all Delivery
1604 Status Notification (bounce) messages are now MIME format per RFC 3464.
1605 Support for RFC 3461 DSN options NOTIFY,ENVID,RET,ORCPT can be advertised
1606 under the control of the dsn_advertise_hosts option, and routers may
1607 have a dsn_lasthop option.
1609 JH/09 A timeout of 2 minutes is now applied to all malware scanner types by
1610 default, modifiable by a malware= option. The list separator for
1611 the options can now be changed in the usual way. Bug 68.
1613 JH/10 The smtp_receive_timeout main option is now expanded before use.
1615 JH/11 The incoming_interface log option now also enables logging of the
1616 local interface on delivery outgoing connections.
1618 JH/12 The cutthrough-routing facility now supports multi-recipient mails,
1619 if the interface and destination host and port all match.
1621 JH/13 Bug 344: The verify = reverse_host_lookup ACL condition now accepts a
1624 JH/14 Bug 1573: The spam= ACL condition now additionally supports Rspamd.
1625 Patch from Andrew Lewis.
1627 JH/15 Bug 670: The spamd_address main option (for the spam= ACL condition)
1628 now supports optional time-restrictions, weighting, and priority
1629 modifiers per server. Patch originally by <rommer@active.by>.
1631 JH/16 The spamd_address main option now supports a mixed list of local
1632 and remote servers. Remote servers can be IPv6 addresses, and
1633 specify a port-range.
1635 JH/17 Bug 68: The spamd_address main option now supports an optional
1636 timeout value per server.
1638 JH/18 Bug 1581: Router and transport options headers_add/remove can
1639 now have the list separator specified.
1641 JH/19 Bug 392: spamd_address, and clamd av_scanner, now support retry
1644 JH/20 Bug 1571: Ensure that $tls_in_peerdn is set, when verification fails
1647 JH/21 Support for the A6 type of dns record is withdrawn.
1649 JH/22 Bug 608: The result of a QUIT or not-QUIT toplevel ACL now matters
1650 rather than the verbs used.
1652 JH/23 Bug 1572: Increase limit on SMTP confirmation message copy size
1653 from 255 to 1024 chars.
1655 JH/24 Verification callouts now attempt to use TLS by default.
1657 HS/01 DNSSEC options (dnssec_require_domains, dnssec_request_domains)
1658 are generic router options now. The defaults didn't change.
1660 JH/25 Bug 466: Add RFC2322 support for MIME attachment filenames.
1661 Original patch from Alexander Shikoff, worked over by JH.
1663 HS/02 Bug 1575: exigrep falls back to autodetection of compressed
1664 files if ZCAT_COMMAND is not executable.
1666 JH/26 Bug 1539: Add timeout/retry options on dnsdb lookups.
1668 JH/27 Bug 286: Support SOA lookup in dnsdb lookups.
1670 JH/28 Bug 1588: Do not use the A lookup following an AAAA for setting the FQDN.
1671 Normally benign, it bites when the pair was led to by a CNAME;
1672 modern usage is to not canonicalize the domain to a CNAME target
1673 (and we were inconsistent anyway for A-only vs AAAA+A).
1675 JH/29 Bug 1632: Removed the word "rejected" from line logged for ACL discards.
1677 JH/30 Check the forward DNS lookup for DNSSEC, in addition to the reverse,
1678 when evaluating $sender_host_dnssec.
1680 JH/31 Check the HELO verification lookup for DNSSEC, adding new
1681 $sender_helo_dnssec variable.
1683 JH/32 Bug 1397: Enable ECDHE on OpenSSL, just the NIST P-256 curve.
1685 JH/33 Bug 1346: Note MAIL cmd seen in -bS batch, to avoid smtp_no_mail log.
1687 JH/34 Bug 1648: Fix a memory leak seen with "mailq" and large queues.
1689 JH/35 Bug 1642: Fix support of $spam_ variables at delivery time. Was
1690 documented as working, but never had. Support all but $spam_report.
1692 JH/36 Bug 1659: Guard checking of input smtp commands again pseudo-command
1693 added for tls authenticator.
1695 HS/03 Add perl_taintmode main config option
1701 TL/01 When running the test suite, the README says that variables such as
1702 no_msglog_check are global and can be placed anywhere in a specific
1703 test's script, however it was observed that placement needed to be near
1704 the beginning for it to behave that way. Changed the runtest perl
1705 script to read through the entire script once to detect and set these
1706 variables, reset to the beginning of the script, and then run through
1707 the script parsing/test process like normal.
1709 TL/02 The BSD's have an arc4random API. One of the functions to induce
1710 adding randomness was arc4random_stir(), but it has been removed in
1711 OpenBSD 5.5. Detect this OpenBSD version and skip calling this
1712 function when detected.
1714 JH/01 Expand the EXPERIMENTAL_TPDA feature. Several different events now
1715 cause callback expansion.
1717 TL/03 Bugzilla 1518: Clarify "condition" processing in routers; that
1718 syntax errors in an expansion can be treated as a string instead of
1719 logging or causing an error, due to the internal use of bool_lax
1720 instead of bool when processing it.
1722 JH/02 Add EXPERIMENTAL_DANE, allowing for using the DNS as trust-anchor for
1723 server certificates when making smtp deliveries.
1725 JH/03 Support secondary-separator specifier for MX, SRV, TLSA lookups.
1727 JH/04 Add ${sort {list}{condition}{extractor}} expansion item.
1729 TL/04 Bugzilla 1216: Add -M (related messages) option to exigrep.
1731 TL/05 GitHub Issue 18: Adjust logic testing for true/false in redis lookups.
1732 Merged patch from Sebastian Wiedenroth.
1734 JH/05 Fix results-pipe from transport process. Several recipients, combined
1735 with certificate use, exposed issues where response data items split
1736 over buffer boundaries were not parsed properly. This eventually
1737 resulted in duplicates being sent. This issue only became common enough
1738 to notice due to the introduction of connection certificate information,
1739 the item size being so much larger. Found and fixed by Wolfgang Breyha.
1741 JH/06 Bug 1533: Fix truncation of items in headers_remove lists. A fixed
1742 size buffer was used, resulting in syntax errors when an expansion
1745 JH/07 Add support for directories of certificates when compiled with a GnuTLS
1746 version 3.3.6 or later.
1748 JH/08 Rename the TPDA experimental facility to Event Actions. The #ifdef
1749 is EXPERIMENTAL_EVENT, the main-configuration and transport options
1750 both become "event_action", the variables become $event_name, $event_data
1751 and $event_defer_errno. There is a new variable $verify_mode, usable in
1752 routers, transports and related events. The tls:cert event is now also
1753 raised for inbound connections, if the main configuration event_action
1756 TL/06 In test suite, disable OCSP for old versions of openssl which contained
1757 early OCSP support, but no stapling (appears to be less than 1.0.0).
1759 JH/09 When compiled with OpenSSL and EXPERIMENTAL_CERTNAMES, the checks on
1760 server certificate names available under the smtp transport option
1761 "tls_verify_cert_hostname" now do not permit multi-component wildcard
1764 JH/10 Time-related extraction expansions from certificates now use the main
1765 option "timezone" setting for output formatting, and are consistent
1766 between OpenSSL and GnuTLS compilations. Bug 1541.
1768 JH/11 Fix a crash in mime ACL when meeting a zero-length, quoted or RFC2047-
1769 encoded parameter in the incoming message. Bug 1558.
1771 JH/12 Bug 1527: Autogrow buffer used in reading spool files. Since they now
1772 include certificate info, eximon was claiming there were spoolfile
1775 JH/13 Bug 1521: Fix ldap lookup for single-attr request, multiple-attr return.
1777 JH/14 Log delivery-related information more consistently, using the sequence
1778 "H=<name> [<ip>]" wherever possible.
1780 TL/07 Bug 1547: Omit RFCs from release. Draft and RFCs have licenses which
1781 are problematic for Debian distribution, omit them from the release
1784 JH/15 Updates and fixes to the EXPERIMENTAL_DSN feature.
1786 JH/16 Fix string representation of time values on 64bit time_t architectures.
1789 JH/17 Fix a null-indirection in certextract expansions when a nondefault
1790 output list separator was used.
1795 TL/01 Bugzilla 1506: Re-add a 'return NULL' to silence complaints from static
1796 checkers that were complaining about end of non-void function with no
1799 JH/01 Bug 1513: Fix parsing of quoted parameter values in MIME headers.
1800 This was a regression introduced in 4.83 by another bugfix.
1802 JH/02 Fix broken compilation when EXPERIMENTAL_DSN is enabled.
1804 TL/02 Bug 1509: Fix exipick for enhanced spoolfile specification used when
1805 EXPERIMENTAL_DSN is enabled. Fix from Wolfgang Breyha.
1811 TF/01 Correctly close the server side of TLS when forking for delivery.
1813 When a message was received over SMTP with TLS, Exim failed to clear up
1814 the incoming connection properly after forking off the child process to
1815 deliver the message. In some situations the subsequent outgoing
1816 delivery connection happened to have the same fd number as the incoming
1817 connection previously had. Exim would try to use TLS and fail, logging
1818 a "Bad file descriptor" error.
1820 TF/02 Portability fix for building lookup modules on Solaris when the xpg4
1821 utilities have not been installed.
1823 JH/01 Fix memory-handling in use of acl as a conditional; avoid free of
1824 temporary space as the ACL may create new global variables.
1826 TL/01 LDAP support uses per connection or global context settings, depending
1827 upon the detected version of the libraries at build time.
1829 TL/02 Experimental Proxy Protocol support: allows a proxied SMTP connection
1830 to extract and use the src ip:port in logging and expansions as if it
1831 were a direct connection from the outside internet. PPv2 support was
1832 updated based on HAProxy spec change in May 2014.
1834 JH/02 Add ${listextract {number}{list}{success}{fail}}.
1836 TL/03 Bugzilla 1433: Fix DMARC SEGV with specific From header contents.
1837 Properly escape header and check for NULL return.
1839 PP/01 Continue incomplete 4.82 PP/19 by fixing docs too: use dns_dnssec_ok
1842 JH/03 Bugzilla 1157: support log_selector smtp_confirmation for lmtp.
1844 TL/04 Add verify = header_names_ascii check to reject email with non-ASCII
1845 characters in header names, implemented as a verify condition.
1846 Contributed by Michael Fischer v. Mollard.
1848 TL/05 Rename SPF condition results err_perm and err_temp to standardized
1849 results permerror and temperror. Previous values are deprecated but
1850 still accepted. In a future release, err_perm and err_temp will be
1851 completely removed, which will be a backward incompatibility if the
1852 ACL tests for either of these two old results. Patch contributed by
1853 user bes-internal on the mailing list.
1855 JH/04 Add ${utf8clean:} operator. Contributed by Alex Rau.
1857 JH/05 Bugzilla 305: Log incoming-TLS details on rejects, subject to log
1858 selectors, in both main and reject logs.
1860 JH/06 Log outbound-TLS and port details, subject to log selectors, for a
1863 JH/07 Add malware type "sock" for talking to simple daemon.
1865 JH/08 Bugzilla 1371: Add tls_{,try_}verify_hosts to smtp transport.
1867 JH/09 Bugzilla 1431: Support (with limitations) headers_add/headers_remove in
1868 routers/transports under cutthrough routing.
1870 JH/10 Bugzilla 1005: ACL "condition =" should accept values which are negative
1871 numbers. Touch up "bool" conditional to keep the same definition.
1873 TL/06 Remove duplicated language in spec file from 4.82 TL/16.
1875 JH/11 Add dnsdb tlsa lookup. From Todd Lyons.
1877 JH/12 Expand items in router/transport headers_add or headers_remove lists
1878 individually rather than the list as a whole. Bug 1452.
1880 Required for reasonable handling of multiple headers_ options when
1881 they may be empty; requires that headers_remove items with embedded
1882 colons must have them doubled (or the list-separator changed).
1884 TL/07 Add new dmarc expansion variable $dmarc_domain_policy to directly
1885 view the policy declared in the DMARC record. Currently, $dmarc_status
1886 is a combined value of both the record presence and the result of the
1889 JH/13 Fix handling of $tls_cipher et.al. in (non-verify) transport. Bug 1455.
1891 JH/14 New options dnssec_request_domains, dnssec_require_domains on the
1892 dnslookup router and the smtp transport (applying to the forward
1895 TL/08 Bugzilla 1453: New LDAP "SERVERS=" option allows admin to override list
1896 of ldap servers used for a specific lookup. Patch provided by Heiko
1899 JH/18 New options dnssec_lax, dnssec_strict on dnsdb lookups.
1900 New variable $lookup_dnssec_authenticated for observability.
1902 TL/09 Bugzilla 609: Add -C option to exiqgrep, specify which exim.conf to use.
1903 Patch submitted by Lars Timman.
1905 JH/19 EXPERIMENTAL_OCSP support under GnuTLS. Bug 1459.
1907 TL/10 Bugzilla 1454: New -oMm option to pass message reference to Exim.
1908 Requires trusted mode and valid format message id, aborts otherwise.
1909 Patch contributed by Heiko Schlichting.
1911 JH/20 New expansion variables tls_(in,out)_(our,peer)cert, and expansion item
1912 certextract with support for various fields. Bug 1358.
1914 JH/21 Observability of OCSP via variables tls_(in,out)_ocsp. Stapling
1915 is requested by default, modifiable by smtp transport option
1918 JH/22 Expansion operators ${md5:string} and ${sha1:string} can now
1919 operate on certificate variables to give certificate fingerprints
1920 Also new ${sha256:cert_variable}.
1922 JH/23 The PRDR feature is moved from being Experimental into the mainline.
1924 TL/11 Bug 1119: fix memory allocation in string_printing2(). Patch from
1925 Christian Aistleitner.
1927 JH/24 The OCSP stapling feature is moved from Experimental into the mainline.
1929 TL/12 Bug 1444: Fix improper \r\n sequence handling when writing spool
1930 file. Patch from Wolfgang Breyha.
1932 JH/25 Expand the coverage of the delivery $host and $host_address to
1933 client authenticators run in verify callout. Bug 1476.
1935 JH/26 Port service names are now accepted for tls_on_connect_ports, to
1936 align with daemon_smtp_ports. Bug 72.
1938 TF/03 Fix udpsend. The ip_connectedsocket() function's socket type
1939 support and error reporting did not work properly.
1941 TL/13 Bug 1495: Exiqgrep check if -C config file specified on cli exists
1942 and is readable. Patch from Andrew Colin Kissa.
1944 TL/14 Enhance documentation of ${run expansion and how it parses the
1945 commandline after expansion, particularly in the case when an
1946 unquoted variable expansion results in an empty value.
1948 JH/27 The TLS SNI feature was broken in 4.82. Fix it.
1950 PP/02 Fix internal collision of T_APL on systems which support RFC3123
1951 by renaming away from it. Addresses GH issue 15, reported by
1954 JH/28 Fix parsing of MIME headers for parameters with quoted semicolons.
1956 TL/15 SECURITY: prevent double expansion in math comparison functions
1957 (can expand unsanitized data). Not remotely exploitable.
1964 PP/01 Add -bI: framework, and -bI:sieve for querying sieve capabilities.
1966 PP/02 Make -n do something, by making it not do something.
1967 When combined with -bP, the name of an option is not output.
1969 PP/03 Added tls_dh_min_bits SMTP transport driver option, only honoured
1972 PP/04 First step towards DNSSEC, provide $sender_host_dnssec for
1973 $sender_host_name and config options to manage this, and basic check
1976 PP/05 DSCP support for outbound connections and control modifier for inbound.
1978 PP/06 Cyrus SASL: set local and remote IP;port properties for driver.
1979 (Only plugin which currently uses this is kerberos4, which nobody should
1980 be using, but we should make it available and other future plugins might
1981 conceivably use it, even though it would break NAT; stuff *should* be
1982 using channel bindings instead).
1984 PP/07 Handle "exim -L <tag>" to indicate to use syslog with tag as the process
1985 name; added for Sendmail compatibility; requires admin caller.
1986 Handle -G as equivalent to "control = suppress_local_fixups" (we used to
1987 just ignore it); requires trusted caller.
1988 Also parse but ignore: -Ac -Am -X<logfile>
1991 TL/01 Bugzilla 1258 - Refactor MAIL FROM optional args processing.
1993 TL/02 Add +smtp_confirmation as a default logging option.
1995 TL/03 Bugzilla 198 - Implement remove_header ACL modifier.
1996 Patch by Magnus Holmgren from 2007-02-20.
1998 TL/04 Bugzilla 1281 - Spec typo.
1999 Bugzilla 1283 - Spec typo.
2000 Bugzilla 1290 - Spec grammar fixes.
2002 TL/05 Bugzilla 1285 - Spec omission, fix docbook errors for spec.txt creation.
2004 TL/06 Add Experimental DMARC support using libopendmarc libraries.
2006 TL/07 Fix an out of order global option causing a segfault. Reported to dev
2007 mailing list by by Dmitry Isaikin.
2009 JH/01 Bugzilla 1201 & 304 - New cutthrough-delivery feature, with TLS support.
2011 JH/02 Support "G" suffix to numbers in ${if comparisons.
2013 PP/08 Handle smtp transport tls_sni option forced-fail for OpenSSL.
2015 NM/01 Bugzilla 1197 - Spec typo
2016 Bugzilla 1196 - Spec examples corrections
2018 JH/03 Add expansion operators ${listnamed:name} and ${listcount:string}
2020 PP/09 Add gnutls_allow_auto_pkcs11 option (was originally called
2021 gnutls_enable_pkcs11, but renamed to more accurately indicate its
2024 PP/10 Let Linux makefile inherit CFLAGS/CFLAGS_DYNAMIC.
2025 Pulled from Debian 30_dontoverridecflags.dpatch by Andreas Metzler.
2027 JH/04 Add expansion item ${acl {name}{arg}...}, expansion condition
2028 "acl {{name}{arg}...}", and optional args on acl condition
2031 JH/05 Permit multiple router/transport headers_add/remove lines.
2033 JH/06 Add dnsdb pseudo-lookup "a+" to do an "aaaa" + "a" combination.
2035 JH/07 Avoid using a waiting database for a single-message-only transport.
2036 Performance patch from Paul Fisher. Bugzilla 1262.
2038 JH/08 Strip leading/trailing newlines from add_header ACL modifier data.
2041 JH/09 Add $headers_added variable, with content from use of ACL modifier
2042 add_header (but not yet added to the message). Bugzilla 199.
2044 JH/10 Add 8bitmime log_selector, for 8bitmime status on the received line.
2045 Pulled from Bugzilla 817 by Wolfgang Breyha.
2047 PP/11 SECURITY: protect DKIM DNS decoding from remote exploit.
2049 (nb: this is the same fix as in Exim 4.80.1)
2051 JH/11 Add A= logging on delivery lines, and a client_set_id option on
2054 JH/12 Add optional authenticated_sender logging to A= and a log_selector
2057 PP/12 Unbreak server_set_id for NTLM/SPA auth, broken by 4.80 PP/29.
2059 PP/13 Dovecot auth: log better reason to rejectlog if Dovecot did not
2060 advertise SMTP AUTH mechanism to us, instead of a generic
2061 protocol violation error. Also, make Exim more robust to bad
2062 data from the Dovecot auth socket.
2064 TF/01 Fix ultimate retry timeouts for intermittently deliverable recipients.
2066 When a queue runner is handling a message, Exim first routes the
2067 recipient addresses, during which it prunes them based on the retry
2068 hints database. After that it attempts to deliver the message to
2069 any remaining recipients. It then updates the hints database using
2072 So if a recipient address works intermittently, it can get repeatedly
2073 deferred at routing time. The retry hints record remains fresh so the
2074 address never reaches the final cutoff time.
2076 This is a fairly common occurrence when a user is bumping up against
2077 their storage quota. Exim had some logic in its local delivery code
2078 to deal with this. However it did not apply to per-recipient defers
2079 in remote deliveries, e.g. over LMTP to a separate IMAP message store.
2081 This change adds a proper retry rule check during routing so that the
2082 final cutoff time is checked against the message's age. We only do
2083 this check if there is an address retry record and there is not a
2084 domain retry record; this implies that previous attempts to handle
2085 the address had the retry_use_local_parts option turned on. We use
2086 this as an approximation for the destination being like a local
2087 delivery, as in LMTP.
2089 I suspect this new check makes the old local delivery cutoff check
2090 redundant, but I have not verified this so I left the code in place.
2092 TF/02 Correct gecos expansion when From: is a prefix of the username.
2094 Test 0254 submits a message to Exim with the header
2098 When I ran the test suite under the user fanf2, Exim expanded
2099 the header to contain my full name, whereas it should have added
2100 a Resent-Sender: header. It erroneously treats any prefix of the
2101 username as equal to the username.
2103 This change corrects that bug.
2105 GF/01 DCC debug and logging tidyup
2106 Error conditions log to paniclog rather than rejectlog.
2107 Debug lines prefixed by "DCC: " to remove any ambiguity.
2109 TF/03 Avoid unnecessary rebuilds of lookup-related code.
2111 PP/14 Fix OCSP reinitialisation in SNI handling for Exim/TLS as server.
2112 Bug spotted by Jeremy Harris; was flawed since initial commit.
2113 Would have resulted in OCSP responses post-SNI triggering an Exim
2114 NULL dereference and crash.
2116 JH/13 Add $router_name and $transport_name variables. Bugzilla 308.
2118 PP/15 Define SIOCGIFCONF_GIVES_ADDR for GNU Hurd.
2119 Bug detection, analysis and fix by Samuel Thibault.
2120 Bugzilla 1331, Debian bug #698092.
2122 SC/01 Update eximstats to watch out for senders sending 'HELO [IpAddr]'
2124 JH/14 SMTP PRDR (http://www.eric-a-hall.com/specs/draft-hall-prdr-00.txt).
2125 Server implementation by Todd Lyons, client by JH.
2126 Only enabled when compiled with EXPERIMENTAL_PRDR. A new
2127 config variable "prdr_enable" controls whether the server
2128 advertises the facility. If the client requests PRDR a new
2129 acl_data_smtp_prdr ACL is called once for each recipient, after
2130 the body content is received and before the acl_smtp_data ACL.
2131 The client is controlled by both of: a hosts_try_prdr option
2132 on the smtp transport, and the server advertisement.
2133 Default client logging of deliveries and rejections involving
2134 PRDR are flagged with the string "PRDR".
2136 PP/16 Fix problems caused by timeouts during quit ACLs trying to double
2137 fclose(). Diagnosis by Todd Lyons.
2139 PP/17 Update configure.default to handle IPv6 localhost better.
2140 Patch by Alain Williams (plus minor tweaks).
2143 PP/18 OpenSSL made graceful with empty tls_verify_certificates setting.
2144 This is now consistent with GnuTLS, and is now documented: the
2145 previous undocumented portable approach to treating the option as
2146 unset was to force an expansion failure. That still works, and
2147 an empty string is now equivalent.
2149 PP/19 Renamed DNSSEC-enabling option to "dns_dnssec_ok", to make it
2150 clearer that Exim is using the DO (DNSSEC OK) EDNS0 resolver flag,
2151 not performing validation itself.
2153 PP/20 Added force_command boolean option to pipe transport.
2154 Patch from Nick Koston, of cPanel Inc.
2156 JH/15 AUTH support on callouts (and hence cutthrough-deliveries).
2159 TF/04 Added udpsend ACL modifier and hexquote expansion operator
2161 PP/21 Fix eximon continuous updating with timestamped log-files.
2162 Broken in a format-string cleanup in 4.80, missed when I repaired the
2163 other false fix of the same issue.
2164 Report and fix from Heiko Schlichting.
2167 PP/22 Guard LDAP TLS usage against Solaris LDAP variant.
2168 Report from Prashanth Katuri.
2170 PP/23 Support safari_ecdhe_ecdsa_bug for openssl_options.
2171 It's SecureTransport, so affects any MacOS clients which use the
2172 system-integrated TLS libraries, including email clients.
2174 PP/24 Fix segfault from trying to fprintf() to a NULL stdio FILE* if
2175 using a MIME ACL for non-SMTP local injection.
2176 Report and assistance in diagnosis by Warren Baker.
2178 TL/08 Adjust exiqgrep to be case-insensitive for sender/receiver.
2180 JH/16 Fix comparisons for 64b. Bugzilla 1385.
2182 TL/09 Add expansion variable $authenticated_fail_id to keep track of
2183 last id that failed so it may be referenced in subsequent ACL's.
2185 TL/10 Bugzilla 1375 - Prevent TLS rebinding in ldap. Patch provided by
2188 TL/11 Bugzilla 1382 - Option ldap_require_cert overrides start_tls
2189 ldap library initialization, allowing self-signed CA's to be
2190 used. Also properly sets require_cert option later in code by
2191 using NULL (global ldap config) instead of ldap handle (per
2192 session). Bug diagnosis and testing by alxgomz.
2194 TL/12 Enhanced documentation in the ratelimit.pl script provided in
2195 the src/util/ subdirectory.
2197 TL/13 Bug 1031 - Imported transport SQL logging patch from Axel Rau
2198 renamed to Transport Post Delivery Action by Jeremy Harris, as
2201 TL/14 Bugzilla 1217 - Redis lookup support has been added. It is only enabled
2202 when Exim is compiled with EXPERIMENTAL_REDIS. A new config variable
2203 redis_servers = needs to be configured which will be used by the redis
2204 lookup. Patch from Warren Baker, of The Packet Hub.
2206 TL/15 Fix exiqsumm summary for corner case. Patch provided by Richard Hall.
2208 TL/16 Bugzilla 1289 - Clarify host/ip processing when have errors looking up a
2209 hostname or reverse DNS when processing a host list. Used suggestions
2210 from multiple comments on this bug.
2212 TL/17 Bugzilla 1057 - Multiple clamd TCP targets patch from Mark Zealey.
2214 TL/18 Had previously added a -CONTINUE option to runtest in the test suite.
2215 Missed a few lines, added it to make the runtest require no keyboard
2218 TL/19 Bugzilla 1402 - Test 533 fails if any part of the path to the test suite
2219 contains upper case chars. Make router use caseful_local_part.
2221 TL/20 Bugzilla 1400 - Add AVOID_GNUTLS_PKCS11 build option. Allows GnuTLS
2222 support when GnuTLS has been built with p11-kit.
2228 PP/01 SECURITY: protect DKIM DNS decoding from remote exploit.
2230 This, or similar/improved, will also be change PP/11 of 4.82.
2236 PP/01 Handle short writes when writing local log-files.
2237 In practice, only affects FreeBSD (8 onwards).
2238 Bugzilla 1053, with thanks to Dmitry Isaikin.
2240 NM/01 Bugzilla 949 - Documentation tweak
2242 NM/02 Bugzilla 1093 - eximstats DATA reject detection regexps
2245 NM/03 Bugzilla 1169 - primary_hostname spelling was incorrect in docs.
2247 PP/02 Implemented gsasl authenticator.
2249 PP/03 Implemented heimdal_gssapi authenticator with "server_keytab" option.
2251 PP/04 Local/Makefile support for (AUTH|LOOKUP)_*_PC=foo to use
2252 `pkg-config foo` for cflags/libs.
2254 PP/05 Swapped $auth1/$auth2 for gsasl GSSAPI mechanism, to be more consistent
2255 with rest of GSASL and with heimdal_gssapi.
2257 PP/06 Local/Makefile support for USE_(GNUTLS|OPENSSL)_PC=foo to use
2258 `pkg-config foo` for cflags/libs for the TLS implementation.
2260 PP/07 New expansion variable $tls_bits; Cyrus SASL server connection
2261 properties get this fed in as external SSF. A number of robustness
2262 and debugging improvements to the cyrus_sasl authenticator.
2264 PP/08 cyrus_sasl server now expands the server_realm option.
2266 PP/09 Bugzilla 1214 - Log authentication information in reject log.
2267 Patch by Jeremy Harris.
2269 PP/10 Added dbmjz lookup type.
2271 PP/11 Let heimdal_gssapi authenticator take a SASL message without an authzid.
2273 PP/12 MAIL args handles TAB as well as SP, for better interop with
2274 non-compliant senders.
2275 Analysis and variant patch by Todd Lyons.
2277 NM/04 Bugzilla 1237 - fix cases where printf format usage not indicated
2278 Bug report from Lars Müller <lars@samba.org> (via SUSE),
2279 Patch from Dirk Mueller <dmueller@suse.com>
2281 PP/13 tls_peerdn now print-escaped for spool files.
2282 Observed some $tls_peerdn in wild which contained \n, which resulted
2283 in spool file corruption.
2285 PP/14 TLS fixes for OpenSSL: support TLS 1.1 & 1.2; new "openssl_options"
2286 values; set SSL_MODE_AUTO_RETRY so that OpenSSL will retry a read
2287 or write after TLS renegotiation, which otherwise led to messages
2290 TK/01 Bugzilla 1239 - fix DKIM verification when signature was not inserted
2291 as a tracking header (ie: a signed header comes before the signature).
2292 Patch from Wolfgang Breyha.
2294 JH/01 Bugzilla 660 - Multi-valued attributes from ldap now parseable as a
2295 comma-sep list; embedded commas doubled.
2297 JH/02 Refactored ACL "verify =" logic to table-driven dispatch.
2299 PP/15 LDAP: Check for errors of TLS initialisation, to give correct
2301 Report and patch from Dmitry Banschikov.
2303 PP/16 Removed "dont_insert_empty_fragments" from "openssl_options".
2304 Removed SSL_clear() after SSL_new() which led to protocol negotiation
2305 failures. We appear to now support TLS1.1+ with Exim.
2307 PP/17 OpenSSL: new expansion var $tls_sni, which if used in tls_certificate
2308 lets Exim select keys and certificates based upon TLS SNI from client.
2309 Also option tls_sni on SMTP Transports. Also clear $tls_bits correctly
2310 before an outbound SMTP session. New log_selector, +tls_sni.
2312 PP/18 Bugzilla 1122 - check localhost_number expansion for failure, avoid
2313 NULL dereference. Report and patch from Alun Jones.
2315 PP/19 DNS resolver init changes for NetBSD compatibility. (Risk of breakage
2316 on less well tested platforms). Obviates NetBSD pkgsrc patch-ac.
2317 Not seeing resolver debug output on NetBSD, but suspect this is a
2318 resolver implementation change.
2320 PP/20 Revert part of NM/04, it broke log_path containing %D expansions.
2321 Left warnings. Added "eximon gdb" invocation mode.
2323 PP/21 Defaulting "accept_8bitmime" to true, not false.
2325 PP/22 Added -bw for inetd wait mode support.
2327 PP/23 Added PCRE_CONFIG=yes support to Makefile for using pcre-config to
2328 locate the relevant includes and libraries. Made this the default.
2330 PP/24 Fixed headers_only on smtp transports (was not sending trailing dot).
2331 Bugzilla 1246, report and most of solution from Tomasz Kusy.
2333 JH/03 ${eval } now uses 64-bit and supports a "g" suffix (like to "k" and "m").
2334 This may cause build issues on older platforms.
2336 PP/25 Revamped GnuTLS support, passing tls_require_ciphers to
2337 gnutls_priority_init, ignoring Exim options gnutls_require_kx,
2338 gnutls_require_mac & gnutls_require_protocols (no longer supported).
2339 Added SNI support via GnuTLS too.
2340 Made ${randint:..} supplier available, if using not-too-old GnuTLS.
2342 PP/26 Added EXPERIMENTAL_OCSP for OpenSSL.
2344 PP/27 Applied dnsdb SPF support patch from Janne Snabb.
2345 Applied second patch from Janne, implementing suggestion to default
2346 multiple-strings-in-record handling to match SPF spec.
2348 JH/04 Added expansion variable $tod_epoch_l for a higher-precision time.
2350 PP/28 Fix DCC dcc_header content corruption (stack memory referenced,
2351 read-only, out of scope).
2352 Patch from Wolfgang Breyha, report from Stuart Northfield.
2354 PP/29 Fix three issues highlighted by clang analyser static analysis.
2355 Only crash-plausible issue would require the Cambridge-specific
2356 iplookup router and a misconfiguration.
2357 Report from Marcin Mirosław.
2359 PP/30 Another attempt to deal with PCRE_PRERELEASE, this one less buggy.
2361 PP/31 %D in printf continues to cause issues (-Wformat=security), so for
2362 now guard some of the printf checks behind WANT_DEEPER_PRINTF_CHECKS.
2363 As part of this, removing so much warning spew let me fix some minor
2364 real issues in debug logging.
2366 PP/32 GnuTLS was always using default tls_require_ciphers, due to a missing
2367 assignment on my part. Fixed.
2369 PP/33 Added tls_dh_max_bits option, defaulting to current hard-coded limit
2370 of NSS, for GnuTLS/NSS interop. Problem root cause diagnosis by
2371 Janne Snabb (who went above and beyond: thank you).
2373 PP/34 Validate tls_require_ciphers on startup, since debugging an invalid
2374 string otherwise requires a connection and a bunch more work and it's
2375 relatively easy to get wrong. Should also expose TLS library linkage
2378 PP/35 Pull in <features.h> on Linux, for some portability edge-cases of
2379 64-bit ${eval} (JH/03).
2381 PP/36 Define _GNU_SOURCE in exim.h; it's needed for some releases of
2382 GNU libc to support some of the 64-bit stuff, should not lead to
2383 conflicts. Defined before os.h is pulled in, so if a given platform
2384 needs to override this, it can.
2386 PP/37 Unbreak Cyrus SASL auth: SSF retrieval was incorrect, Exim thought
2387 protection layer was required, which is not implemented.
2388 Bugzilla 1254, patch from Wolfgang Breyha.
2390 PP/38 Overhaul DH prime handling, supply RFC-specified DH primes as built
2391 into Exim, default to IKE id 23 from RFC 5114 (2048 bit). Make
2392 tls_dhparam take prime identifiers. Also unbreak combination of
2393 OpenSSL+DH_params+TLSSNI.
2395 PP/39 Disable SSLv2 by default in OpenSSL support.
2401 PP/01 Solaris build fix for Oracle's LDAP libraries.
2402 Bugzilla 1109, patch from Stephen Usher.
2404 TF/01 HP/UX build fix: avoid arithmetic on a void pointer.
2406 TK/01 DKIM Verification: Fix relaxed canon for empty headers w/o
2409 TF/02 Fix a couple more cases where we did not log the error message
2410 when unlink() failed. See also change 4.74-TF/03.
2412 TF/03 Make the exiwhat support code safe for signals. Previously Exim might
2413 lock up or crash if it happened to be inside a call to libc when it
2414 got a SIGUSR1 from exiwhat.
2416 The SIGUSR1 handler appends the current process status to the process
2417 log which is later printed by exiwhat. It used to use the general
2418 purpose logging code to do this, but several functions it calls are
2419 not safe for signals.
2421 The new output code in the SIGUSR1 handler is specific to the process
2422 log, and simple enough that it's easy to inspect for signal safety.
2423 Removing some special cases also simplifies the general logging code.
2424 Removing the spurious timestamps from the process log simplifies
2427 TF/04 Improved ratelimit ACL condition.
2429 The /noupdate option has been deprecated in favour of /readonly which
2430 has clearer semantics. The /leaky, /strict, and /readonly update modes
2431 are mutually exclusive. The update mode is no longer included in the
2432 database key; it just determines when the database is updated. (This
2433 means that when you upgrade Exim will forget old rate measurements.)
2435 Exim now checks that the per_* options are used with an update mode that
2436 makes sense for the current ACL. For example, when Exim is processing a
2437 message (e.g. acl_smtp_rcpt or acl_smtp_data, etc.) you can specify
2438 per_mail/leaky or per_mail/strict; otherwise (e.g. in acl_smtp_helo) you
2439 must specify per_mail/readonly. If you omit the update mode it defaults to
2440 /leaky where that makes sense (as before) or /readonly where required.
2442 The /noupdate option is now undocumented but still supported for
2443 backwards compatibility. It is equivalent to /readonly except that in
2444 ACLs where /readonly is required you may specify /leaky/noupdate or
2445 /strict/noupdate which are treated the same as /readonly.
2447 A useful new feature is the /count= option. This is a generalization
2448 of the per_byte option, so that you can measure the throughput of other
2449 aggregate values. For example, the per_byte option is now equivalent
2450 to per_mail/count=${if >{0}{$message_size} {0} {$message_size} }.
2452 The per_rcpt option has been generalized using the /count= mechanism
2453 (though it's more complicated than the per_byte equivalence). When it is
2454 used in acl_smtp_rcpt, the per_rcpt option adds recipients to the
2455 measured rate one at a time; if it is used later (e.g. in acl_smtp_data)
2456 or in a non-SMTP ACL it adds all the recipients in one go. (The latter
2457 /count=$recipients_count behaviour used to work only in non-SMTP ACLs.)
2458 Note that using per_rcpt with a non-readonly update mode in more than
2459 one ACL will cause the recipients to be double-counted. (The per_mail
2460 and per_byte options don't have this problem.)
2462 The handling of very low rates has changed slightly. If the computed rate
2463 is less than the event's count (usually one) then this event is the first
2464 after a long gap. In this case the rate is set to the same as this event's
2465 count, so that the first message of a spam run is counted properly.
2467 The major new feature is a mechanism for counting the rate of unique
2468 events. The new per_addr option counts the number of different
2469 recipients that someone has sent messages to in the last time period. It
2470 behaves like per_rcpt if all the recipient addresses are different, but
2471 duplicate recipient addresses do not increase the measured rate. Like
2472 the /count= option this is a general mechanism, so the per_addr option
2473 is equivalent to per_rcpt/unique=$local_part@$domain. You can, for
2474 example, measure the rate that a client uses different sender addresses
2475 with the options per_mail/unique=$sender_address. There are further
2476 details in the main documentation.
2478 TF/05 Removed obsolete $Cambridge$ CVS revision strings.
2480 TF/06 Removed a few PCRE remnants.
2482 TF/07 Automatically extract Exim's version number from tags in the git
2483 repository when doing development or release builds.
2485 PP/02 Raise smtp_cmd_buffer_size to 16kB.
2486 Bugzilla 879. Patch from Paul Fisher.
2488 PP/03 Implement SSL-on-connect outbound with protocol=smtps on smtp transport.
2489 Heavily based on revision 40f9a89a from Simon Arlott's tree.
2492 PP/04 Use .dylib instead of .so for dynamic library loading on MacOS.
2494 PP/05 Variable $av_failed, true if the AV scanner deferred.
2495 Bugzilla 1078. Patch from John Horne.
2497 PP/06 Stop make process more reliably on build failure.
2498 Bugzilla 1087. Patch from Heiko Schlittermann.
2500 PP/07 Make maildir_use_size_file an _expandable_ boolean.
2501 Bugzilla 1089. Patch from Heiko Schlittermann.
2503 PP/08 Handle ${run} returning more data than OS pipe buffer size.
2504 Bugzilla 1131. Patch from Holger Weiß.
2506 PP/09 Handle IPv6 addresses with SPF.
2507 Bugzilla 860. Patch from Wolfgang Breyha.
2509 PP/10 GnuTLS: support TLS 1.2 & 1.1.
2511 Use gnutls_certificate_verify_peers2() [patch from Andreas Metzler].
2514 PP/11 match_* no longer expand right-hand-side by default.
2515 New compile-time build option, EXPAND_LISTMATCH_RHS.
2516 New expansion conditions, "inlist", "inlisti".
2518 PP/12 fix uninitialised greeting string from PP/03 (smtps client support).
2520 PP/13 shell and compiler warnings fixes for RC1-RC4 changes.
2522 PP/14 fix log_write() format string regression from TF/03.
2523 Bugzilla 1152. Patch from Dmitry Isaikin.
2529 PP/01 The new ldap_require_cert option would segfault if used. Fixed.
2531 PP/02 Harmonised TLS library version reporting; only show if debugging.
2532 Layout now matches that introduced for other libraries in 4.74 PP/03.
2534 PP/03 New openssl_options items: no_sslv2 no_sslv3 no_ticket no_tlsv1
2536 PP/04 New "dns_use_edns0" global option.
2538 PP/05 Don't segfault on misconfiguration of ref:name exim-user as uid.
2541 PP/06 Extra paranoia around buffer usage at the STARTTLS transition.
2542 nb: Exim is not vulnerable to http://www.kb.cert.org/vuls/id/555316
2544 TK/01 Updated PolarSSL code to 0.14.2.
2545 Bugzilla 1097. Patch from Andreas Metzler.
2547 PP/07 Catch divide-by-zero in ${eval:...}.
2548 Fixes bugzilla 1102.
2550 PP/08 Condition negation of bool{}/bool_lax{} did not negate. Fixed.
2553 TK/02 Bugzilla 1106: CVE-2011-1764 - DKIM log line was subject to a
2554 format-string attack -- SECURITY: remote arbitrary code execution.
2556 TK/03 SECURITY - DKIM signature header parsing was double-expanded, second
2557 time unintentionally subject to list matching rules, letting the header
2558 cause arbitrary Exim lookups (of items which can occur in lists, *not*
2559 arbitrary string expansion). This allowed for information disclosure.
2561 PP/09 Fix another SIGFPE (x86) in ${eval:...} expansion, this time related to
2562 INT_MIN/-1 -- value coerced to INT_MAX.
2568 NM/01 Workaround for PCRE version dependency in version reporting
2571 TF/01 Update valgrind.h and memcheck.h to copies from valgrind-3.6.0.
2572 This fixes portability to compilers other than gcc, notably
2573 Solaris CC and HP-UX CC. Fixes Bugzilla 1050.
2575 TF/02 Bugzilla 139: Avoid using the += operator in the modular lookup
2576 makefiles for portability to HP-UX and POSIX correctness.
2578 PP/01 Permit LOOKUP_foo enabling on the make command-line.
2579 Also via indented variable definition in the Makefile.
2580 (Debugging by Oliver Heesakkers).
2582 PP/02 Restore caching of spamd results with expanded spamd_address.
2583 Patch from author of expandable spamd_address patch, Wolfgang Breyha.
2585 PP/03 Build issue: lookups-Makefile now exports LC_ALL=C
2586 Improves build reliability. Fix from: Frank Elsner
2588 NM/02 Fix wide character breakage in the rfc2047 coding
2589 Fixes bug 1064. Patch from Andrey N. Oktyabrski
2591 NM/03 Allow underscore in dnslist lookups
2592 Fixes bug 1026. Patch from Graeme Fowler
2594 PP/04 Bugzilla 230: Support TLS-enabled LDAP (in addition to ldaps).
2595 Code patches from Adam Ciarcinski of NetBSD.
2597 NM/04 Fixed exiqgrep to cope with mailq missing size issue
2600 PP/05 Bugzilla 1083: when lookup expansion defers, escape the output which
2601 is logged, to avoid truncation. Patch from John Horne.
2603 PP/06 Bugzilla 1042: implement freeze_signal on pipe transports.
2604 Patch from Jakob Hirsch.
2606 PP/07 Bugzilla 1061: restrict error messages sent over SMTP to not reveal
2607 SQL string expansion failure details.
2608 Patch from Andrey Oktyabrski.
2610 PP/08 Bugzilla 486: implement %M datestamping in log filenames.
2611 Patch from Simon Arlott.
2613 PP/09 New lookups functionality failed to compile on old gcc which rejects
2614 extern declarations in function scope.
2615 Patch from Oliver Fleischmann
2617 PP/10 Use sig_atomic_t for flags set from signal handlers.
2618 Check getgroups() return and improve debugging.
2619 Fixed developed for diagnosis in bug 927 (which turned out to be
2622 PP/11 Bugzilla 1055: Update $message_linecount for maildir_tag.
2623 Patch from Mark Zealey.
2625 PP/12 Bugzilla 1056: Improved spamd server selection.
2626 Patch from Mark Zealey.
2628 PP/13 Bugzilla 1086: Deal with maildir quota file races.
2629 Based on patch from Heiko Schlittermann.
2631 PP/14 Bugzilla 1019: DKIM multiple signature generation fix.
2632 Patch from Uwe Doering, sign-off by Michael Haardt.
2634 NM/05 Fix to spam.c to accommodate older gcc versions which dislike
2635 variable declaration deep within a block. Bug and patch from
2638 PP/15 lookups-Makefile IRIX compatibility coercion.
2640 PP/16 Make DISABLE_DKIM build knob functional.
2642 NM/06 Bugzilla 968: child_open_uid: restore default SIGPIPE handler
2643 Patch by Simon Arlott
2645 TF/03 Fix valgrind.h portability to C89 compilers that do not support
2646 variable argument macros. Our copy now differs from upstream.
2652 TF/01 Failure to get a lock on a hints database can have serious
2653 consequences so log it to the panic log.
2655 TF/02 Log LMTP confirmation messages in the same way as SMTP,
2656 controlled using the smtp_confirmation log selector.
2658 TF/03 Include the error message when we fail to unlink a spool file.
2660 DW/01 Bugzilla 139: Support dynamically loaded lookups as modules.
2661 With thanks to Steve Haslam, Johannes Berg & Serge Demonchaux
2662 for maintaining out-of-tree patches for some time.
2664 PP/01 Bugzilla 139: Documentation and portability issues.
2665 Avoid GNU Makefile-isms, let Exim continue to build on BSD.
2666 Handle per-OS dynamic-module compilation flags.
2668 PP/02 Let /dev/null have normal permissions.
2669 The 4.73 fixes were a little too stringent and complained about the
2670 permissions on /dev/null. Exempt it from some checks.
2671 Reported by Andreas M. Kirchwitz.
2673 PP/03 Report version information for many libraries, including
2674 Exim version information for dynamically loaded libraries. Created
2675 version.h, now support a version extension string for distributors
2676 who patch heavily. Dynamic module ABI change.
2678 PP/04 CVE-2011-0017 - check return value of setuid/setgid. This is a
2679 privilege escalation vulnerability whereby the Exim run-time user
2680 can cause root to append content of the attacker's choosing to
2683 PP/05 Bugzilla 1041: merged DCC maintainer's fixes for return code.
2686 PP/06 Bugzilla 1071: fix delivery logging with untrusted macros.
2687 If dropping privileges for untrusted macros, we disabled normal logging
2688 on the basis that it would fail; for the Exim run-time user, this is not
2689 the case, and it resulted in successful deliveries going unlogged.
2690 Fixed. Reported by Andreas Metzler.
2696 PP/01 Date: & Message-Id: revert to normally being appended to a message,
2697 only prepend for the Resent-* case. Fixes regression introduced in
2698 Exim 4.70 by NM/22 for Bugzilla 607.
2700 PP/02 Include check_rfc2047_length in configure.default because we're seeing
2701 increasing numbers of administrators be bitten by this.
2703 JJ/01 Added DISABLE_DKIM and comment to src/EDITME
2705 PP/03 Bugzilla 994: added openssl_options main configuration option.
2707 PP/04 Bugzilla 995: provide better SSL diagnostics on failed reads.
2709 PP/05 Bugzilla 834: provide a permit_coredump option for pipe transports.
2711 PP/06 Adjust NTLM authentication to handle SASL Initial Response.
2713 PP/07 If TLS negotiated an anonymous cipher, we could end up with SSL but
2714 without a peer certificate, leading to a segfault because of an
2715 assumption that peers always have certificates. Be a little more
2716 paranoid. Problem reported by Martin Tscholak.
2718 PP/08 Bugzilla 926: switch ClamAV to use the new zINSTREAM API for content
2719 filtering; old API available if built with WITH_OLD_CLAMAV_STREAM=yes
2720 NB: ClamAV planning to remove STREAM in "middle of 2010".
2721 CL also introduces -bmalware, various -d+acl logging additions and
2722 more caution in buffer sizes.
2724 PP/09 Implemented reverse_ip expansion operator.
2726 PP/10 Bugzilla 937: provide a "debug" ACL control.
2728 PP/11 Bugzilla 922: Documentation dusting, patch provided by John Horne.
2730 PP/12 Bugzilla 973: Implement --version.
2732 PP/13 Bugzilla 752: Refuse to build/run if Exim user is root/0.
2734 PP/14 Build without WITH_CONTENT_SCAN. Path from Andreas Metzler.
2736 PP/15 Bugzilla 816: support multiple condition rules on Routers.
2738 PP/16 Add bool_lax{} expansion operator and use that for combining multiple
2739 condition rules, instead of bool{}. Make both bool{} and bool_lax{}
2740 ignore trailing whitespace.
2742 JJ/02 prevent non-panic DKIM error from being sent to paniclog
2744 JJ/03 added tcp_wrappers_daemon_name to allow host entries other than
2747 PP/17 Fix malware regression for cmdline scanner introduced in PP/08.
2748 Notification from Dr Andrew Aitchison.
2750 PP/18 Change ClamAV response parsing to be more robust and to handle ClamAV's
2751 ExtendedDetectionInfo response format.
2752 Notification from John Horne.
2754 PP/19 OpenSSL 1.0.0a compatibility const-ness change, should be backwards
2757 PP/20 Added a CONTRIBUTING file. Fixed the documentation build to use http:
2758 XSL and documented dependency on system catalogs, with examples of how
2761 DW/21 Added Valgrind hooks in store.c to help it capture out-of-bounds store
2764 DW/22 Bugzilla 1044: CVE-2010-4345 - partial fix: restrict default behaviour
2765 of CONFIGURE_OWNER and CONFIGURE_GROUP options to no longer allow a
2766 configuration file which is writeable by the Exim user or group.
2768 DW/23 Bugzilla 1044: CVE-2010-4345 - part two: extend checks for writeability
2769 of configuration files to cover files specified with the -C option if
2770 they are going to be used with root privileges, not just the default
2773 DW/24 Bugzilla 1044: CVE-2010-4345 - part three: remove ALT_CONFIG_ROOT_ONLY
2774 option (effectively making it always true).
2776 DW/25 Add TRUSTED_CONFIG_PREFIX_FILE option to allow alternative configuration
2777 files to be used while preserving root privileges.
2779 DW/26 Set FD_CLOEXEC on SMTP sockets after forking in the daemon, to ensure
2780 that rogue child processes cannot use them.
2782 PP/27 Bugzilla 1047: change the default for system_filter_user to be the Exim
2783 run-time user, instead of root.
2785 PP/28 Add WHITELIST_D_MACROS option to let some macros be overridden by the
2786 Exim run-time user without dropping privileges.
2788 DW/29 Remove use of va_copy() which breaks pre-C99 systems. Duplicate the
2789 result string, instead of calling string_vformat() twice with the same
2792 DW/30 Allow TRUSTED_CONFIG_PREFIX_FILE only for Exim or CONFIGURE_OWNER, not
2793 for other users. Others should always drop root privileges if they use
2794 -C on the command line, even for a whitelisted configure file.
2796 DW/31 Turn TRUSTED_CONFIG_PREFIX_FILE into TRUSTED_CONFIG_FILE. No prefixes.
2798 NM/01 Fixed bug #1002 - Message loss when using multiple deliveries
2804 JJ/01 installed exipick 20100104.1, adding $max_received_linelength,
2805 $data_path, and $header_path variables; fixed documentation bugs and
2808 JJ/02 installed exipick 20100222.0, added --input-dir and --finput to allow
2809 exipick to access non-standard spools, including the "frozen" queue
2812 NM/01 Bugzilla 965: Support mysql stored procedures.
2813 Patch from Alain Williams
2815 NM/02 Bugzilla 961: Spacing fix (syntax error) on Makefile directives for NetBSD
2817 NM/03 Bugzilla 955: Documentation fix for max_rcpts.
2818 Patch from Andreas Metzler
2820 NM/04 Bugzilla 954: Fix for unknown responses from Dovecot authenticator.
2821 Patch from Kirill Miazine
2823 NM/05 Bugzilla 671: Added umask to procmail example.
2825 JJ/03 installed exipick 20100323.0, fixing doc bug
2827 NM/06 Bugzilla 988: CVE-2010-2023 - prevent hardlink attack on sticky mail
2828 directory. Notification and patch from Dan Rosenberg.
2830 TK/01 PDKIM: Upgrade PolarSSL files to upstream version 0.12.1.
2832 TK/02 Improve log output when DKIM signing operation fails.
2834 MH/01 Treat the transport option dkim_domain as a colon separated
2835 list, not as a single string, and sign the message with each element,
2836 omitting multiple occurences of the same signer.
2838 NM/07 Null terminate DKIM strings, Null initialise DKIM variable
2839 Bugzilla 985, 986. Patch by Simon Arlott
2841 NM/08 Bugzilla 967. dnsdb DNS TXT record bug fix (DKIM-related)
2842 Patch by Simon Arlott
2844 PP/01 Bugzilla 989: CVE-2010-2024 - work round race condition on
2845 MBX locking. Notification from Dan Rosenberg.
2851 TK/01 Bugzilla 912: Fix DKIM segfault on empty headers/body.
2853 NM/01 Bugzilla 913: Documentation fix for gnutls_* options.
2855 NM/02 Bugzilla 722: Documentation for randint. Better randomness defaults.
2857 NM/03 Bugzilla 847: Enable DNSDB lookup by default.
2859 NM/04 Bugzilla 915: Flag broken perl installation during build.
2865 TK/01 Added patch by Johannes Berg that expands the main option
2866 "spamd_address" if it starts with a dollar sign.
2868 TK/02 Write list of recipients to X-Envelope-Sender header when building
2869 the mbox-format spool file for content scanning (suggested by Jakob
2872 TK/03 Added patch by Wolfgang Breyha that adds experimental DCC
2873 (http://www.dcc-servers.net/) support via dccifd. Activated by
2874 setting EXPERIMENTAL_DCC=yes in Local/Makefile.
2876 TK/04 Bugzilla 673: Add f-protd malware scanner support. Patch submitted
2877 by Mark Daniel Reidel <mr@df.eu>.
2879 NM/01 Bugzilla 657: Embedded PCRE removed from the exim source tree.
2880 When building exim an external PCRE library is now needed -
2881 PCRE is a system library on the majority of modern systems.
2882 See entry on PCRE_LIBS in EDITME file.
2884 NM/02 Bugzilla 646: Removed unwanted C/R in Dovecot authenticator
2885 conversation. Added nologin parameter to request.
2886 Patch contributed by Kirill Miazine.
2888 TF/01 Do not log submission mode rewrites if they do not change the address.
2890 TF/02 Bugzilla 662: Fix stack corruption before exec() in daemon.c.
2892 NM/03 Bugzilla 602: exicyclog now handles panic log, and creates empty
2893 log files in place. Contributed by Roberto Lima.
2895 NM/04 Bugzilla 667: Close socket used by dovecot authenticator.
2897 TF/03 Bugzilla 615: When checking the local_parts router precondition
2898 after a local_part_suffix or local_part_prefix option, Exim now
2899 does not use the address's named list lookup cache, since this
2900 contains cached lookups for the whole local part.
2902 NM/05 Bugzilla 521: Integrated SPF Best Guess support contributed by
2903 Robert Millan. Documentation is in experimental-spec.txt.
2905 TF/04 Bugzilla 668: Fix parallel build (make -j).
2907 NM/05.2 Bugzilla 437: Prevent Maildir aux files being created with mode 000.
2909 NM/05.3 Bugzilla 598: Improvement to Dovecot authenticator handling.
2910 Patch provided by Jan Srzednicki.
2912 TF/05 Leading white space used to be stripped from $spam_report which
2913 wrecked the formatting. Now it is preserved.
2915 TF/06 Save $spam_score, $spam_bar, and $spam_report in spool files, so
2916 that they are available at delivery time.
2918 TF/07 Fix the way ${extract is skipped in the untaken branch of a conditional.
2920 TF/08 TLS error reporting now respects the incoming_interface and
2921 incoming_port log selectors.
2923 TF/09 Produce a more useful error message if an SMTP transport's hosts
2924 setting expands to an empty string.
2926 NM/06 Bugzilla 744: EXPN did not work under TLS.
2927 Patch provided by Phil Pennock.
2929 NM/07 Bugzilla 769: Extraneous comma in usage fprintf
2930 Patch provided by Richard Godbee.
2932 NM/08 Fixed erroneous documentation references to smtp_notquit_acl to be
2933 acl_smtp_notquit, added index entry.
2935 NM/09 Bugzilla 787: Potential buffer overflow in string_format.
2936 Patch provided by Eugene Bujak.
2938 NM/10 Bugzilla 770: Problem on some platforms modifying the len parameter to
2939 accept(). Patch provided by Maxim Dounin.
2941 NM/11 Bugzilla 749: Preserve old behaviour of blanks comparing equal to zero.
2942 Patch provided by Phil Pennock.
2944 NM/12 Bugzilla 497: Correct behaviour of exiwhat when no config exists.
2946 NM/13 Bugzilla 590: Correct handling of Resent-Date headers.
2947 Patch provided by Brad "anomie" Jorsch.
2949 NM/14 Bugzilla 622: Added timeout setting to transport filter.
2950 Patch provided by Dean Brooks.
2952 TK/05 Add native DKIM support (does not depend on external libraries).
2954 NM/15 Bugzilla 854: Removed code that symlinks to pcre as its no longer useful.
2955 Patch provided by Graeme Fowler.
2957 NM/16 Bugzilla 851: Documentation example syntax fix.
2959 NM/17 Changed NOTICE file to remove references to embedded PCRE.
2961 NM/18 Bugzilla 894: Fix issue with very long lines including comments in
2964 NM/19 Bugzilla 745: TLS version reporting.
2965 Patch provided by Phil Pennock.
2967 NM/20 Bugzilla 167: bool: condition support.
2968 Patch provided by Phil Pennock.
2970 NM/21 Bugzilla 665: gnutls_compat_mode to allow compatibility with broken
2971 clients. Patch provided by Phil Pennock.
2973 NM/22 Bugzilla 607: prepend (not append) Resent-Message-ID and Resent-Date.
2974 Patch provided by Brad "anomie" Jorsch.
2976 NM/23 Bugzilla 687: Fix misparses in eximstats.
2977 Patch provided by Heiko Schlittermann.
2979 NM/24 Bugzilla 688: Fix exiwhat to handle log_selector = +pid.
2980 Patch provided by Heiko Schlittermann.
2982 NM/25 Bugzilla 727: Use transport mode as default mode for maildirsize file.
2983 plus update to original patch.
2985 NM/26 Bugzilla 799: Documentation correction for ratelimit.
2987 NM/27 Bugzilla 802: Improvements to local interface IP addr detection.
2988 Patch provided by David Brownlee.
2990 NM/28 Bugzilla 807: Improvements to LMTP delivery logging.
2992 NM/29 Bugzilla 862, 866, 875: Documentation bugfixes.
2994 NM/30 Bugzilla 888: TLS documentation bugfixes.
2996 NM/31 Bugzilla 896: Dovecot buffer overrun fix.
2998 NM/32 Bugzilla 889: Change all instances of "expr" in shell scripts to "expr --"
2999 Unlike the original bugzilla I have changed all shell scripts in src tree.
3001 NM/33 Bugzilla 898: Transport filter timeout fix.
3002 Patch by Todd Rinaldo.
3004 NM/34 Bugzilla 901: Fix sign/unsigned and UTF mismatches.
3005 Patch by Serge Demonchaux.
3007 NM/35 Bugzilla 39: Base64 decode bug fixes.
3008 Patch by Jakob Hirsch.
3010 NM/36 Bugzilla 909: Correct connect() call in dcc code.
3012 NM/37 Bugzilla 910: Correct issue with relaxed/simple handling.
3014 NM/38 Bugzilla 908: Removed NetBSD3 support as no longer needed.
3016 NM/39 Bugzilla 911: Fixed MakeLinks build script.
3022 TK/01 Add preliminary DKIM support. Currently requires a forked version of
3023 ALT-N's libdkim that I have put here:
3024 http://duncanthrax.net/exim-experimental/
3026 Note to Michael Haardt: I had to rename some vars in sieve.c. They
3027 were called 'true' and it seems that C99 defines that as a reserved
3028 keyword to be used with 'bool' variable types. That means you could
3029 not include C99-style headers which use bools without triggering
3030 build errors in sieve.c.
3032 NM/01 Bugzilla 592: --help option is handled incorrectly if exim is invoked
3033 as mailq or other aliases. Changed the --help handling significantly
3034 to do whats expected. exim_usage() emits usage/help information.
3036 SC/01 Added the -bylocaldomain option to eximstats.
3038 NM/02 Bugzilla 619: Defended against bad data coming back from gethostbyaddr.
3040 NM/03 Bugzilla 613: Documentation fix for acl_not_smtp.
3042 NM/04 Bugzilla 628: PCRE update to 7.4 (work done by John Hall).
3048 PH/01 Another patch from the Sieve maintainer.
3050 PH/02 When an IPv6 address is converted to a string for single-key lookup
3051 in an address list (e.g. for an item such as "net24-dbm;/net/works"),
3052 dots are used instead of colons so that keys in lsearch files need not
3053 contain colons. This was done some time before quoting was made available
3054 in lsearch files. However, iplsearch files do require colons in IPv6 keys
3055 (notated using the quote facility) so as to distinguish them from IPv4
3056 keys. This meant that lookups for IP addresses in host lists did not work
3057 for iplsearch lookups.
3059 This has been fixed by arranging for IPv6 addresses to be expressed with
3060 colons if the lookup type is iplsearch. This is not incompatible, because
3061 previously such lookups could never work.
3063 The situation is now rather anomalous, since one *can* have colons in
3064 ordinary lsearch keys. However, making the change in all cases is
3065 incompatible and would probably break a number of configurations.
3067 TK/01 Change PRVS address formatting scheme to reflect latests BATV draft
3070 MH/01 The "spam" ACL condition code contained a sscanf() call with a %s
3071 conversion specification without a maximum field width, thereby enabling
3072 a rogue spamd server to cause a buffer overflow. While nobody in their
3073 right mind would setup Exim to query an untrusted spamd server, an
3074 attacker that gains access to a server running spamd could potentially
3075 exploit this vulnerability to run arbitrary code as the Exim user.
3077 TK/02 Bugzilla 502: Apply patch to make the SPF-Received: header use
3078 $primary_hostname instead of what libspf2 thinks the hosts name is.
3080 MH/02 The dsearch lookup now uses lstat(2) instead of stat(2) to look for
3081 a directory entry by the name of the lookup key. Previously, if a
3082 symlink pointed to a non-existing file or a file in a directory that
3083 Exim lacked permissions to read, a lookup for a key matching that
3084 symlink would fail. Now it is enough that a matching directory entry
3085 exists, symlink or not. (Bugzilla 503.)
3087 PH/03 The body_linecount and body_zerocount variables are now exported in the
3090 PH/04 Added the $dnslist_matched variable.
3092 PH/05 Unset $tls_cipher and $tls_peerdn before making a connection as a client.
3093 This means they are set thereafter only if the connection becomes
3096 PH/06 Added the client_condition to authenticators so that some can be skipped
3097 by clients under certain conditions.
3099 PH/07 The error message for a badly-placed control=no_multiline_responses left
3100 "_responses" off the end of the name.
3102 PH/08 Added -Mvc to output a copy of a message in RFC 2822 format.
3104 PH/09 Tidied the code for creating ratelimiting keys, creating them explicitly
3105 (without spaces) instead of just copying the configuration text.
3107 PH/10 Added the /noupdate option to the ratelimit ACL condition.
3109 PH/11 Added $max_received_linelength.
3111 PH/12 Added +ignore_defer and +include_defer to host lists.
3113 PH/13 Installed PCRE version 7.2. This needed some changes because of the new
3114 way in which PCRE > 7.0 is built.
3116 PH/14 Implemented queue_only_load_latch.
3118 PH/15 Removed an incorrect (int) cast when reading the value of SIZE in a
3119 MAIL command. The effect was to mangle the value on 64-bit systems.
3121 PH/16 Another patch from the Sieve maintainer.
3123 PH/17 Added the NOTQUIT ACL, based on a patch from Ted Cooper.
3125 PH/18 If a system quota error occurred while trying to create the file for
3126 a maildir delivery, the message "Mailbox is full" was not appended to the
3127 bounce if the delivery eventually timed out. Change 4.67/27 below applied
3128 only to a quota excession during the actual writing of the file.
3130 PH/19 It seems that peer DN values may contain newlines (and other non-printing
3131 characters?) which causes problems in log lines. The DN values are now
3132 passed through string_printing() before being added to log lines.
3134 PH/20 Added the "servers=" facility to MySQL and PostgreSQL lookups. (Oracle
3135 and InterBase are left for another time.)
3137 PH/21 Added message_body_newlines option.
3139 PH/22 Guard against possible overflow in moan_check_errorcopy().
3141 PH/23 POSIX allows open() to be a macro; guard against that.
3143 PH/24 If the recipient of an error message contained an @ in the local part
3144 (suitably quoted, of course), incorrect values were put in $domain and
3145 $local_part during the evaluation of errors_copy.
3151 MH/01 Fix for bug #448, segfault in Dovecot authenticator when interface_address
3152 is unset (happens when testing with -bh and -oMi isn't used). Thanks to
3155 PH/01 Added a new log selector smtp_no_mail, to log SMTP sessions that do not
3156 issue a MAIL command.
3158 PH/02 In an ACL statement such as
3160 deny dnslists = X!=127.0.0.2 : X=127.0.0.2
3162 if a client was not listed at all, or was listed with a value other than
3163 127.0.0.2, in the X list, but was listed with 127.0.0.2 in the Y list,
3164 the condition was not true (as it should be), so access was not denied.
3165 The bug was that the ! inversion was incorrectly passed on to the second
3166 item. This has been fixed.
3168 PH/03 Added additional dnslists conditions == and =& which are different from
3169 = and & when the dns lookup returns more than one IP address.
3171 PH/04 Added gnutls_require_{kx,mac,protocols} to give more control over the
3172 cipher suites used by GnuTLS. These options are ignored by OpenSSL.
3174 PH/05 After discussion on the list, added a compile time option ENABLE_DISABLE_
3175 FSYNC, which compiles an option called disable_fsync that allows for
3176 bypassing fsync(). The documentation is heavily laced with warnings.
3178 SC/01 Updated eximstats to collate all SpamAssassin rejects into one bucket.
3180 PH/06 Some tidies to the infrastructure of the Test Suite that is concerned
3181 with the auxiliary C programs that it uses: (1) Arrange for BIND_8_COMPAT
3182 to be defined when compiling on OSX (Darwin); (2) Tidies to the Makefile,
3183 including adding "make clean"; (3) Added -fPIC when compiling the test
3184 dynamically loaded module, to get rid of a warning.
3186 MH/02 Fix for bug #451, causing paniclog entries to be written if a bounce
3187 message fails, move_frozen_messages = true and ignore_bounce_errors_after
3188 = 0s. The bug is otherwise harmless.
3190 PH/07 There was a bug in the dovecot authenticator such that the value of
3191 $auth1 could be overwritten, and so not correctly preserved, after a
3192 successful authentication. This usually meant that the value preserved by
3193 the server_setid option was incorrect.
3195 PH/08 Added $smtp_count_at_connection_start, deliberately with a long name.
3197 PH/09 Installed PCRE release 7.0.
3199 PH/10 The acl_not_smtp_start ACL was, contrary to the documentation, not being
3200 run for batched SMTP input. It is now run at the start of every message
3201 in the batch. While fixing this I discovered that the process information
3202 (output by running exiwhat) was not always getting set for -bs and -bS
3203 input. This is fixed, and it now also says "batched" for BSMTP.
3205 PH/11 Added control=no_pipelining.
3207 PH/12 Added $sending_ip_address and $sending_port (mostly Magnus Holmgren's
3208 patch, slightly modified), and move the expansion of helo_data till after
3209 the connection is made in the smtp transport (so it can use these
3212 PH/13 Added ${rfc2047d: to decoded RFC 2047 strings.
3214 PH/14 Added log_selector = +pid.
3216 PH/15 Flush SMTP output before delaying, unless control=no_delay_flush is set.
3218 PH/16 Add ${if forany and ${if forall.
3220 PH/17 Added dsn_from option to vary the From: line in DSNs.
3222 PH/18 Flush SMTP output before performing a callout, unless control =
3223 no_callout_flush is set.
3225 PH/19 Change 4.64/PH/36 introduced a bug: when address_retry_include_sender
3226 was true (the default) a successful delivery failed to delete the retry
3227 item, thus causing premature timeout of the address. The bug is now
3230 PH/20 Added hosts_avoid_pipelining to the smtp transport.
3232 PH/21 Long custom messages for fakedefer and fakereject are now split up
3233 into multiline responses in the same way that messages for "deny" and
3234 other ACL rejections are.
3236 PH/22 Applied Jori Hamalainen's speed-up changes and typo fixes to exigrep,
3237 with slight modification.
3239 PH/23 Applied sieve patches from the maintainer "tracking the latest notify
3240 draft, changing the syntax and factoring some duplicate code".
3242 PH/24 When the log selector "outgoing_port" was set, the port was shown as -1
3243 for deliveries of the second and subsequent messages over the same SMTP
3246 PH/25 Applied Magnus Holmgren's patch for ${addresses, ${map, ${filter, and
3247 ${reduce, with only minor "tidies".
3249 SC/02 Applied Daniel Tiefnig's patch to improve the '($parent) =' pattern match.
3251 PH/26 Added a "continue" ACL modifier that does nothing, for the benefit of its
3252 expansion side effects.
3254 PH/27 When a message times out after an over-quota error from an Exim-imposed
3255 quota, the bounce message says "mailbox is full". This message was not
3256 being given when it was a system quota that was exceeded. It now should
3259 MH/03 Made $recipients available in local_scan(). local_scan() already has
3260 better access to the recipient list through recipients_list[], but
3261 $recipients can be useful in postmaster-provided expansion strings.
3263 PH/28 The $smtp_command and $smtp_command_argument variables were not correct
3264 in the case of a MAIL command with additional options following the
3265 address, for example: MAIL FROM:<foo@bar> SIZE=1234. The option settings
3266 were accidentally chopped off.
3268 PH/29 SMTP synchronization checks are implemented when a command is read -
3269 there is a check that no more input is waiting when there shouldn't be
3270 any. However, for some commands, a delay in an ACL can mean that it is
3271 some time before the response is written. In this time, more input might
3272 arrive, invalidly. So now there are extra checks after an ACL has run for
3273 HELO/EHLO and after the predata ACL, and likewise for MAIL and RCPT when
3274 pipelining has not been advertised.
3276 PH/30 MH's patch to allow iscntrl() characters to be list separators.
3278 PH/31 Unlike :fail:, a custom message specified with :defer: was not being
3279 returned in the SMTP response when smtp_return_error_details was false.
3280 This has been fixed.
3282 PH/32 Change the Dovecot authenticator to use read() and write() on the socket
3283 instead of the C I/O that was originally supplied, because problems were
3284 reported on Solaris.
3286 PH/33 Compile failed with OpenSSL 0.9.8e. This was due to a coding error in
3287 Exim which did not show up earlier: it was assuming that a call to
3288 SSL_CTX_set_info_callback() might give an error value. In fact, there is
3289 no error. In previous releases of OpenSSL, SSL_CTX_set_info_callback()
3290 was a macro that became an assignment, so it seemed to work. This has
3291 changed to a proper function call with a void return, hence the compile
3292 error. Exim's code has been fixed.
3294 PH/34 Change HDA_SIZE in oracle.c from 256 to 512. This is needed for 64-bit
3297 PH/35 Applied a patch from the Sieve maintainer which fixes a bug in "notify".
3299 PH/36 Applied John Jetmore's patch to add -v functionality to exigrep.
3301 PH/37 If a message is not accepted after it has had an id assigned (e.g.
3302 because it turns out to be too big or there is a timeout) there is no
3303 "Completed" line in the log. When some messages of this type were
3304 selected by exigrep, they were listed as "not completed". Others were
3305 picked up by some special patterns. I have improved the selection
3306 criteria to be more general.
3308 PH/38 The host_find_failed option in the manualroute router can now be set
3309 to "ignore", to completely ignore a host whose IP address cannot be
3310 found. If all hosts are ignored, the behaviour is controlled by the new
3311 host_all_ignored option.
3313 PH/39 In a list of hosts for manualroute, if one item (either because of multi-
3314 homing or because of multiple MX records with /mx) generated more than
3315 one IP address, and the following item turned out to be the local host,
3316 all the secondary addresses of the first item were incorrectly removed
3317 from the list, along with the local host and any following hosts (which
3318 is what is supposed to happen).
3320 PH/40 When Exim receives a message, it writes the login name, uid, and gid of
3321 whoever called Exim into the -H file. In the case of the daemon it was
3322 behaving confusingly. When first started, it used values for whoever
3323 started the daemon, but after a SIGHUP it used the Exim user (because it
3324 calls itself on a restart). I have changed the code so that it now always
3327 PH/41 (Following a suggestion from Tony Finch) If all the RCPT commands in a
3328 message are rejected with the same error (e.g. no authentication or bad
3329 sender address), and a DATA command is nevertheless sent (as can happen
3330 with PIPELINING or a stupid MUA), the error message that was given to the
3331 RCPT commands is included in the rejection of the DATA command. This is
3332 intended to be helpful for MUAs that show only the final error to their
3335 PH/42 Another patch from the Sieve maintainer.
3337 SC/02 Eximstats - Differentiate between permanent and temporary rejects.
3338 Eximstats - Fixed some broken HTML links and added missing column headers
3340 Eximstats - Fixed Grand Total Summary Domains, Edomains, and Email
3341 columns for Rejects, Temp Rejects, Ham, and Spam rows.
3343 SC/03 Eximstats - V1.58 Fix to get <> and blackhole to show in edomain tables.
3345 PH/43 Yet another patch from the Sieve maintainer.
3347 PH/44 I found a way to check for a TCP/IP connection going away before sending
3348 the response to the final '.' that terminates a message, but only in the
3349 case where the client has not sent further data following the '.'
3350 (unfortunately, this is allowed). However, in many cases there won't be
3351 any further data because there won't be any more messages to send. A call
3352 to select() can be used: if it shows that the input is "ready", there is
3353 either input waiting, or the socket has been closed. An attempt to read
3354 the next input character can distinguish the two cases. Previously, Exim
3355 would have sent an OK response which the client would never have see.
3356 This could lead to message repetition. This fix should cure that, at
3357 least in a lot of common cases.
3359 PH/45 Do not advertise STARTTLS in response to HELP unless it would be
3360 advertised in response to EHLO.
3366 PH/01 Two more bugs that were introduced by 4.64/PH/07, in addition to the one
3367 fixed by 4.65/MH/01 (is this a record?) are fixed:
3369 (i) An empty string was always treated as zero by the numeric comparison
3370 operators. This behaviour has been restored.
3372 (ii) It is documented that the numeric comparison operators always treat
3373 their arguments as decimal numbers. This was broken in that numbers
3374 starting with 0 were being interpreted as octal.
3376 While fixing these problems I realized that there was another issue that
3377 hadn't been noticed. Values of message_size_limit (both the global option
3378 and the transport option) were treated as octal if they started with 0.
3379 The documentation was vague. These values are now always treated as
3380 decimal, and I will make that clear in the documentation.
3386 TK/01 Disable default definition of HAVE_LINUX_SENDFILE. Clashes with
3387 Linux large file support (_FILE_OFFSET_BITS=64) on older glibc
3390 MH/01 Don't check that the operands of numeric comparison operators are
3391 integers when their expansion is in "skipping" mode (fixes bug
3392 introduced by 4.64-PH/07).
3394 PH/01 If a system filter or a router generates more than SHRT_MAX (32767)
3395 child addresses, Exim now panics and dies. Previously, because the count
3396 is held in a short int, deliveries were likely to be lost. As such a
3397 large number of recipients for a single message is ridiculous
3398 (performance will be very, very poor), I have chosen to impose a limit
3399 rather than extend the field.
3405 TK/01 Bugzilla #401. Fix DK spooling code so that it can overwrite a
3406 leftover -K file (the existence of which was triggered by #402).
3407 While we were at it, introduced process PID as part of the -K
3408 filename. This should rule out race conditions when creating
3411 TK/02 Bugzilla #402. Apply patch from Simon Arlott, speeding up DK signing
3412 processing considerably. Previous code took too long for large mails,
3413 triggering a timeout which in turn triggers #401.
3415 TK/03 Introduced HAVE_LINUX_SENDFILE to os.h-Linux. Currently only used
3416 in the DK code in transports.c. sendfile() is not really portable,
3417 hence the _LINUX specificness.
3419 TF/01 In the add_headers option to the mail command in an Exim filter,
3420 there was a bug that Exim would claim a syntax error in any
3421 header after the first one which had an odd number of characters
3424 PH/01 If a server that rejects MAIL FROM:<> was the target of a sender
3425 callout verification, Exim cached a "reject" for the entire domain. This
3426 is correct for most verifications, but it is not correct for a recipient
3427 verification with use_sender or use_postmaster set, because in that case
3428 the callout does not use MAIL FROM:<>. Exim now distinguishes the special
3429 case of MAIL FROM:<> rejection from other early rejections (e.g.
3430 rejection of HELO). When verifying a recipient using a non-null MAIL
3431 address, the cache is ignored if it shows MAIL FROM:<> rejection.
3432 Whatever the result of the callout, the value of the domain cache is
3433 left unchanged (for any other kind of callout, getting as far as trying
3434 RCPT means that the domain itself is ok).
3436 PH/02 Tidied a number of unused variable and signed/unsigned warnings that
3439 PH/03 On Solaris, an unexpectedly close socket (dropped connection) can
3440 manifest itself as EPIPE rather than ECONNECT. When tidying away a
3441 session, the daemon ignores ECONNECT errors and logs others; it now
3442 ignores EPIPE as well.
3444 PH/04 Applied Nico Erfurth's refactoring patch to tidy up mime.c
3445 (quoted-printable decoding).
3447 PH/05 Applied Nico Erfurth's refactoring patch to tidy up spool_mbox.c, and
3448 later the small subsequent patch to fix an introduced bug.
3450 PH/06 Installed the latest Cygwin Makefile from the Cygwin maintainer.
3452 PH/07 There was no check for overflow in expansions such as ${if >{1}{4096M}}.
3454 PH/08 An error is now given if message_size_limit is specified negative.
3456 PH/09 Applied and tidied up Jakob Hirsch's patch for allowing ACL variables
3457 to be given (somewhat) arbitrary names.
3459 JJ/01 exipick 20060919.0, allow for arbitrary acl_ variables introduced
3462 JJ/02 exipick 20060919.0, --show-vars args can now be regular expressions,
3463 miscellaneous code fixes
3465 PH/10 Added the log_reject_target ACL modifier to specify where to log
3468 PH/11 Callouts were setting the name used for EHLO/HELO from $smtp_active_
3469 hostname. This is wrong, because it relates to the incoming message (and
3470 probably the interface on which it is arriving) and not to the outgoing
3471 callout (which could be using a different interface). This has been
3472 changed to use the value of the helo_data option from the smtp transport
3473 instead - this is what is used when a message is actually being sent. If
3474 there is no remote transport (possible with a router that sets up host
3475 addresses), $smtp_active_hostname is used.
3477 PH/12 Installed Andrey Panin's patch to add a dovecot authenticator. Various
3478 tweaks were necessary in order to get it to work (see also 21 below):
3479 (a) The code assumed that strncpy() returns a negative number on buffer
3480 overflow, which isn't the case. Replaced with Exim's string_format()
3482 (b) There were several signed/unsigned issues. I just did the minimum
3483 hacking in of casts. There is scope for a larger refactoring.
3484 (c) The code used strcasecmp() which is not a standard C function.
3485 Replaced with Exim's strcmpic() function.
3486 (d) The code set only $1; it now sets $auth1 as well.
3487 (e) A simple test gave the error "authentication client didn't specify
3488 service in request". It would seem that Dovecot has changed its
3489 interface. Fortunately there's a specification; I followed it and
3490 changed what the client sends and it appears to be working now.
3492 PH/13 Added $message_headers_raw to provide the headers without RFC 2047
3495 PH/14 Corrected misleading output from -bv when -v was also used. Suppose the
3496 address A is aliased to B and C, where B exists and C does not. Without
3497 -v the output is "A verified" because verification stops after a
3498 successful redirection if more than one address is generated. However,
3499 with -v the child addresses are also verified. Exim was outputting "A
3500 failed to verify" and then showing the successful verification for C,
3501 with its parentage. It now outputs "B failed to verify", showing B's
3502 parentage before showing the successful verification of C.
3504 PH/15 Applied Michael Deutschmann's patch to allow DNS black list processing to
3505 look up a TXT record in a specific list after matching in a combined
3508 PH/16 It seems that the options setting for the resolver (RES_DEFNAMES and
3509 RES_DNSRCH) can affect the behaviour of gethostbyname() and friends when
3510 they consult the DNS. I had assumed they would set it the way they
3511 wanted; and indeed my experiments on Linux seem to show that in some
3512 cases they do (I could influence IPv6 lookups but not IPv4 lookups).
3513 To be on the safe side, however, I have now made the interface to
3514 host_find_byname() similar to host_find_bydns(), with an argument
3515 containing the DNS resolver options. The host_find_byname() function now
3516 sets these options at its start, just as host_find_bydns() does. The smtp
3517 transport options dns_qualify_single and dns_search_parents are passed to
3518 host_find_byname() when gethostbyname=TRUE in this transport. Other uses
3519 of host_find_byname() use the default settings of RES_DEFNAMES
3520 (qualify_single) but not RES_DNSRCH (search_parents).
3522 PH/17 Applied (a modified version of) Nico Erfurth's patch to make
3523 spool_read_header() do less string testing, by means of a preliminary
3524 switch on the second character of optional "-foo" lines. (This is
3525 overdue, caused by the large number of possibilities that now exist.
3526 Originally there were few.) While I was there, I also converted the
3527 str(n)cmp tests so they don't re-test the leading "-" and the first
3528 character, in the hope this might squeeze out yet more improvement.
3530 PH/18 Two problems with "group" syntax in header lines when verifying: (1) The
3531 flag allowing group syntax was set by the header_syntax check but not
3532 turned off, possible causing trouble later; (2) The flag was not being
3533 set at all for the header_verify test, causing "group"-style headers to
3534 be rejected. I have now set it in this case, and also caused header_
3535 verify to ignore an empty address taken from a group. While doing this, I
3536 came across some other cases where the code for allowing group syntax
3537 while scanning a header line wasn't quite right (mostly, not resetting
3538 the flag correctly in the right place). These bugs could have caused
3539 trouble for malformed header lines. I hope it is now all correct.
3541 PH/19 The functions {pwcheck,saslauthd}_verify_password() are always called
3542 with the "reply" argument non-NULL. The code, however (which originally
3543 came from elsewhere) had *some* tests for NULL when it wrote to *reply,
3544 but it didn't always do it. This confused somebody who was copying the
3545 code for some other use. I have removed all the tests.
3547 PH/20 It was discovered that the GnuTLS code had support for RSA_EXPORT, a
3548 feature that was used to support insecure browsers during the U.S. crypto
3549 embargo. It requires special client support, and Exim is probably the
3550 only MTA that supported it -- and would never use it because real RSA is
3551 always available. This code has been removed, because it had the bad
3552 effect of slowing Exim down by computing (never used) parameters for the
3553 RSA_EXPORT functionality.
3555 PH/21 On the advice of Timo Sirainen, added a check to the dovecot
3556 authenticator to fail if there's a tab character in the incoming data
3557 (there should never be unless someone is messing about, as it's supposed
3558 to be base64-encoded). Also added, on Timo's advice, the "secured" option
3559 if the connection is using TLS or if the remote IP is the same as the
3560 local IP, and the "valid-client-cert option" if a client certificate has
3563 PH/22 As suggested by Dennis Davis, added a server_condition option to *all*
3564 authenticators. This can be used for authorization after authentication
3565 succeeds. (In the case of plaintext, it servers for both authentication
3568 PH/23 Testing for tls_required and lost_connection in a retry rule didn't work
3569 if any retry times were supplied.
3571 PH/24 Exim crashed if verify=helo was activated during an incoming -bs
3572 connection, where there is no client IP address to check. In this
3573 situation, the verify now always succeeds.
3575 PH/25 Applied John Jetmore's -Mset patch.
3577 PH/26 Added -bem to be like -Mset, but loading a message from a file.
3579 PH/27 In a string expansion for a processed (not raw) header when multiple
3580 headers of the same name were present, leading whitespace was being
3581 removed from all of them, but trailing whitespace was being removed only
3582 from the last one. Now trailing whitespace is removed from each header
3583 before concatenation. Completely empty headers in a concatenation (as
3584 before) are ignored.
3586 PH/28 Fixed bug in backwards-compatibility feature of PH/09 (thanks to John
3587 Jetmore). It would have mis-read ACL variables from pre-4.61 spool files.
3589 PH/29 [Removed. This was a change that I later backed out, and forgot to
3590 correct the ChangeLog entry (that I had efficiently created) before
3591 committing the later change.]
3593 PH/30 Exim was sometimes attempting to deliver messages that had suffered
3594 address errors (4xx response to RCPT) over the same connection as other
3595 messages routed to the same hosts. Such deliveries are always "forced",
3596 so retry times are not inspected. This resulted in far too many retries
3597 for the affected addresses. The effect occurred only when there were more
3598 hosts than the hosts_max_try setting in the smtp transport when it had
3599 the 4xx errors. Those hosts that it had tried were not added to the list
3600 of hosts for which the message was waiting, so if all were tried, there
3601 was no problem. Two fixes have been applied:
3603 (i) If there are any address or message errors in an SMTP delivery, none
3604 of the hosts (tried or untried) are now added to the list of hosts
3605 for which the message is waiting, so the message should not be a
3606 candidate for sending over the same connection that was used for a
3607 successful delivery of some other message. This seems entirely
3608 reasonable: after all the message is NOT "waiting for some host".
3609 This is so "obvious" that I'm not sure why it wasn't done
3610 previously. Hope I haven't missed anything, but it can't do any
3611 harm, as the worst effect is to miss an optimization.
3613 (ii) If, despite (i), such a delivery is accidentally attempted, the
3614 routing retry time is respected, so at least it doesn't keep
3615 hammering the server.
3617 PH/31 Installed Andrew Findlay's patch to close the writing end of the socket
3618 in ${readsocket because some servers need this prod.
3620 PH/32 Added some extra debug output when updating a wait-xxx database.
3622 PH/33 The hint "could be header name not terminated by colon", which has been
3623 given for certain expansion errors for a long time, was not being given
3624 for the ${if def:h_colon_omitted{... case.
3626 PH/34 The spec says: "With one important exception, whenever a domain list is
3627 being scanned, $domain contains the subject domain." There was at least
3628 one case where this was not true.
3630 PH/35 The error "getsockname() failed: connection reset by peer" was being
3631 written to the panic log as well as the main log, but it isn't really
3632 panic-worthy as it just means the connection died rather early on. I have
3633 removed the panic log writing for the ECONNRESET error when getsockname()
3636 PH/36 After a 4xx response to a RCPT error, that address was delayed (in queue
3637 runs only) independently of the message's sender address. This meant
3638 that, if the 4xx error was in fact related to the sender, a different
3639 message to the same recipient with a different sender could confuse
3640 things. In particular, this can happen when sending to a greylisting
3641 server, but other circumstances could also provoke similar problems.
3642 I have changed the default so that the retry time for these errors is now
3643 based a combination of the sender and recipient addresses. This change
3644 can be overridden by setting address_retry_include_sender=false in the
3647 PH/37 For LMTP over TCP/IP (the smtp transport), error responses from the
3648 remote server are returned as part of bounce messages. This was not
3649 happening for LMTP over a pipe (the lmtp transport), but now it is the
3650 same for both kinds of LMTP.
3652 PH/38 Despite being documented as not happening, Exim was rewriting addresses
3653 in header lines that were in fact CNAMEs. This is no longer the case.
3655 PH/39 If -R or -S was given with -q<time>, the effect of -R or -S was ignored,
3656 and queue runs started by the daemon processed all messages. This has
3657 been fixed so that -R and -S can now usefully be given with -q<time>.
3659 PH/40 Import PCRE release 6.7 (fixes some bugs).
3661 PH/41 Add bitwise logical operations to eval (courtesy Brad Jorsch).
3663 PH/42 Give an error if -q is specified more than once.
3665 PH/43 Renamed the variables $interface_address and $interface_port as
3666 $received_ip_address and $received_port, to make it clear that these
3667 values apply to message reception, and not to the outgoing interface when
3668 a message is delivered. (The old names remain recognized, of course.)
3670 PH/44 There was no timeout on the connect() call when using a Unix domain
3671 socket in the ${readsocket expansion. There now is.
3673 PH/45 Applied a modified version of Brad Jorsch's patch to allow "message" to
3674 be meaningful with "accept".
3676 SC/01 Eximstats V1.43
3677 Bug fix for V1.42 with -h0 specified. Spotted by Chris Lear.
3679 SC/02 Eximstats V1.44
3680 Use a glob alias rather than an array ref in the generated
3681 parser. This improves both readability and performance.
3683 SC/03 Eximstats V1.45 (Marco Gaiarin / Steve Campbell)
3684 Collect SpamAssassin and rejection statistics.
3685 Don't display local sender or destination tables unless
3686 there is data to show.
3687 Added average volumes into the top table text output.
3689 SC/04 Eximstats V1.46
3690 Collect data on the number of addresses (recipients)
3691 as well as the number of messages.
3693 SC/05 Eximstats V1.47
3694 Added 'Message too big' to the list of mail rejection
3695 reasons (thanks to Marco Gaiarin).
3697 SC/06 Eximstats V1.48
3698 Mainlog lines which have GMT offsets and are too short to
3699 have a flag are now skipped.
3701 SC/07 Eximstats V1.49 (Alain Williams)
3702 Added the -emptyok flag.
3704 SC/08 Eximstats V1.50
3705 Fixes for obtaining the IP address from reject messages.
3707 JJ/03 exipick.20061117.2, made header handling as similar to exim as possible
3708 (added [br]h_ prefixes, implemented RFC2047 decoding. Fixed
3709 whitespace changes from 4.64-PH/27
3711 JJ/04 exipick.20061117.2, fixed format and added $message_headers_raw to
3714 JJ/05 exipick.20061117.2, bug fixes (error out sooner when invalid criteria
3715 are found, allow negative numbers in numeric criteria)
3717 JJ/06 exipick.20061117.2, added new $message_body_missing variable
3719 JJ/07 exipick.20061117.2, added $received_ip_address and $received_port
3720 to match changes made in 4.64-PH/43
3722 PH/46 Applied Jori Hamalainen's patch to add features to exiqsumm.
3724 PH/47 Put in an explicit test for a DNS lookup of an address record where the
3725 "domain" is actually an IP address, and force a failure. This locks out
3726 those revolvers/nameservers that support "A-for-A" lookups, in
3727 contravention of the specifications.
3729 PH/48 When a host name was looked up from an IP address, and the subsequent
3730 forward lookup of the name timed out, the host name was left in
3731 $sender_host_name, contrary to the specification.
3733 PH/49 Although default lookup types such as lsearch* or cdb*@ have always been
3734 restricted to single-key lookups, Exim was not diagnosing an error if
3735 * or *@ was used with a query-style lookup.
3737 PH/50 Increased the value of DH_BITS in tls-gnu.c from 768 to 1024.
3739 MH/01 local_scan ABI version incremented to 1.1. It should have been updated
3740 long ago, but noone interested enough thought of it. Let's just say that
3741 the "1.1" means that there are some new functions that weren't there at
3742 some point in the past.
3744 PH/51 Error processing for expansion failure of helo_data from an smtp
3745 transport during callout processing was broken.
3747 PH/52 Applied John Jetmore's patch to allow tls-on-connect and STARTTLS to be
3748 tested/used via the -bh/-bhc/-bs options.
3750 PH/53 Added missing "#include <time.h>" to pcre/pcretest.c (this was a PCRE
3751 bug, fixed in subsequent PCRE releases).
3753 PH/54 Applied Robert Bannocks' patch to avoid a problem with references that
3754 arises when using the Solaris LDAP libraries (but not with OpenLDAP).
3756 PH/55 Check for a ridiculously long file name in exim_dbmbuild.
3762 SC/01 Use a glob alias rather than an array ref in eximstats generated
3763 parser. This improves both readability and performance.
3765 SC/02 Collect SpamAssassin and rejection statistics in eximstats.
3766 Don't display local sender or destination tables in eximstats unless
3767 there is data to show.
3768 Added average volumes into the eximstats top table text output.
3770 SC/03 Collect data on the number of addresses (recipients) as well
3771 as the number of messages in eximstats.
3773 TF/01 Correct an error in the documentation for the redirect router. Exim
3774 does (usually) call initgroups() when daemonizing.
3776 TF/02 Call initgroups() when dropping privilege in exim.c, so that Exim runs
3777 with consistent privilege compared to when running as a daemon.
3779 TF/03 Note in the spec that $authenticated_id is not set for local
3780 submissions from trusted users.
3782 TF/04 The ratelimit per_rcpt option now works correctly in acl_not_smtp.
3783 Thanks to Dean Brooks <dean@iglou.com> for the patch.
3785 TF/05 Make it easier to get SMTP authentication and TLS/SSL support working
3786 by adding some example configuration directives to the default
3787 configuration file. A little bit of work is required to uncomment the
3788 directives and define how usernames and passwords are checked, but
3789 there is now a framework to start from.
3791 PH/01 Added #define LDAP_DEPRECATED 1 to ldap.c because some of the "old"
3792 functions that Exim currently uses aren't defined in ldap.h for OpenLDAP
3793 without this. I don't know how relevant this is to other LDAP libraries.
3795 PH/02 Add the verb name to the "unknown ACL verb" error.
3797 PH/03 Magnus Holmgren's patch for filter_prepend_home.
3799 PH/03 Fixed Bugzilla #101: macro definition between ACLs doesn't work.
3801 PH/04 Applied Magnus Holmgren's patch to fix Bugzilla #98: transport's home
3802 directory not expanded when it should be if an expanded home directory
3803 was set for the address (which is overridden by the transport).
3805 PH/05 Applied Alex Kiernan's patch to fix Bugzilla #99: a problem with
3808 PH/06 Added acl_not_smtp_start, based on Johannes Berg's patch, and set the
3809 bit to forbid control=suppress_local_fixups in the acl_not_smtp ACL,
3810 because it is too late at that time, and has no effect.
3812 PH/07 Changed ${quote_pgsql to quote ' as '' instead of \' because of a
3813 security issue with \' (bugzilla #107). I could not use the
3814 PQescapeStringConn() function, because it needs a PGconn value as one of
3817 PH/08 When testing addresses using -bt, indicate those final addresses that
3818 are duplicates that would not cause an additional delivery. At least one
3819 person was confused, thinking that -bt output corresponded to deliveries.
3820 (Suppressing duplicates isn't a good idea as you lose the information
3821 about possibly different redirections that led to the duplicates.)
3823 PH/09 Applied patch from Erik to use select() instead of poll() in spam.c on
3824 systems where poll() doesn't work, in particular OS X.
3826 PH/10 Added more information to debugging output for retry time not reached.
3828 PH/11 Applied patch from Arkadiusz Miskiewicz to apply a timeout to read
3829 operations in malware.c.
3831 PH/12 Applied patch from Magnus Holmgren to include the "h" tag in Domain Keys
3834 PH/13 If write_rejectlog was set false when logging was sent to syslog with
3835 syslog_duplication set false, log lines that would normally be written
3836 both the the main log and to the reject log were not written to syslog at
3839 PH/14 In the default configuration, change the use of "message" in ACL warn
3840 statements to "add_header".
3842 PH/15 Diagnose a filter syntax error for "seen", "unseen", or "noerror" if not
3843 not followed by a command (e.g. "seen endif").
3845 PH/16 Recognize SMTP codes at the start of "message" in ACLs and after :fail:
3846 and :defer: in a redirect router. Add forbid_smtp_code to suppress the
3849 PH/17 Added extra conditions to the default value of delay_warning_condition
3853 { !eq{$h_list-id:$h_list-post:$h_list-subscribe:}{} } \
3854 { match{$h_precedence:}{(?i)bulk|list|junk} } \
3855 { match{$h_auto-submitted:}{(?i)auto-generated|auto-replied} } \
3858 The Auto-Submitted: and various List- headers are standardised, whereas I
3859 don't think Precedence: ever was.
3861 PH/18 Refactored debugging code in route_finduser() to show more information,
3862 in particular, the error code if getpwnam() issues one.
3864 PH/19 Added PQsetClientEncoding(conn, "SQL_ASCII") to the pgsql code module.
3865 This is apparently needed in addition to the PH/07 change above to avoid
3866 any possible encoding problems.
3868 PH/20 Perl can change the locale. Exim was resetting it after a ${perl call,
3869 but not after initializing Perl.
3871 PH/21 Added a call to PQsetNoticeProcessor() to catch pgsql "notices" and
3872 output them only if debugging. By default they are written stderr,
3873 apparently, which is not desirable.
3875 PH/22 Added Alain Williams' LDAP patch to support setting REFERRALS=off on
3878 JJ/01 exipick: added --reverse (and -R synonym), --random, --size, --sort and
3881 JJ/02 exipick: rewrote --help documentation to hopefully make more clear.
3883 PH/23 Made -oMaa and -oMt work with -bh and -bs to pretend the connection is
3884 authenticated or an ident call has been made. Suppress the default
3885 values for $authenticated_id and $authenticated_sender (but permit -oMai
3886 and -oMas) when testing with -bh.
3888 PH/24 Re-jigged the order of the tests in the default configuration so that the
3889 tests for valid domains and recipients precede the DNS black list and CSA
3890 tests, on the grounds that those ones are more expensive.
3892 PH/25 Exim was not testing for a space following SMTP commands such as EHLO
3893 that require one. Thus, EHLORHUBARB was interpreted as a valid command.
3894 This bug exists in every version of Exim that I still have, right back to
3897 PH/26 (n)wildlsearch lookups are documented as being done case-insensitively.
3898 However, an attempt to turn on case-sensitivity in a regex key by
3899 including (?-i) didn't work because the subject string was already
3900 lowercased, and the effects were non-intuitive. It turns out that a
3901 one-line patch can be used to allow (?-i) to work as expected.
3907 TF/01 Fix the add_header change below (4.61 PH/55) which had a bug that (amongst
3908 other effects) broke the use of negated acl sub-conditions.
3910 PH/01 ${readsocket now supports Internet domain sockets (modified John Jetmore
3913 PH/02 When tcp-wrappers is called from Exim, it returns only "deny" or "allow".
3914 "Deny" causes Exim to reject the incoming connection with a 554 error.
3915 Unfortunately, if there is a major crisis, such as a disk failure,
3916 tcp-wrappers gives "deny", whereas what one would like would be some
3917 kind of temporary error. A kludge has been added to help with this.
3918 Before calling hosts_ctl(), errno is set zero. If the result is "deny", a
3919 554 error is used if errno is still zero or contains ENOENT (which occurs
3920 if either of the /etc/hosts.{allow,deny} files is missing). Otherwise, a
3923 PH/03 Add -lutil to the default FreeBSD LIBS setting.
3925 PH/04 Change PH/19 for 4.61 was too wide. It should not be applied to host
3926 errors. Otherwise a message that provokes a temporary error (when other
3927 messages do not) can cause a whole host to time out.
3929 PH/05 Batch deliveries by appendfile and pipe transports did not work when the
3930 addresses were routed directly to files or pipes from a redirect router.
3931 File deliveries just didn't batch; pipe deliveries might have suffered
3934 PH/06 A failure to get a lock for a hints database would erroneously always say
3935 "Failed to get write lock", even when it was really a read lock.
3937 PH/07 The appendfile transport was creating MBX lock files with a fixed mode
3938 of 0600. This has been changed to use the value of the lockfile_mode
3939 option (which defaults to 0600).
3941 PH/08 Applied small patch from the Sieve maintainer.
3943 PH/09 If maildir_quota_directory_regex was set to exclude (say) the .Trash
3944 folder from quota calculations, a direct delivery into this folder messed
3945 up the contents of the maildirsize file. This was because the regex was
3946 used only to exclude .Trash (or whatever) when the size of the mailbox
3947 was calculated. There was no check that a delivery was happening into an
3948 excluded directory. This bug has been fixed by ignoring all quota
3949 processing for deliveries into excluded directories.
3951 PH/10 Added the maildirfolder_create_regex option to appendfile.
3957 PH/01 The code for finding all the local interface addresses on a FreeBSD
3958 system running IPv6 was broken. This may well have applied to all BSD
3959 systems, as well as to others that have similar system calls. The broken
3960 code found IPv4 interfaces correctly, but gave incorrect values for the
3961 IPv6 interfaces. In particular, ::1 was not found. The effect in Exim was
3962 that it would not match correctly against @[] and not recognize the IPv6
3965 PH/02 The ipliteral router was not recognizing addresses of the form user@
3966 [ipv6:....] because it didn't know about the "ipv6:" prefix.
3968 PH/03 Added disable_ipv6.
3970 PH/04 Changed $reply_address to use the raw form of the headers instead of the
3971 decoded form, because it is most often used to construct To: headers
3972 lines in autoreplies, and the decoded form may well be syntactically
3973 invalid. However, $reply_address has leading white space removed, and all
3974 newlines turned into spaces so that the autoreply transport does not
3977 PH/05 If group was specified without a user on a router, and no group or user
3978 was specified on a transport, the group from the router was ignored.
3980 PH/06 Increased the number of ACL variables to 20 of each type, and arranged
3981 for visible compile-time settings that can be used to change these
3982 numbers, for those that want even more. Backwards compatibility with old
3983 spool files has been maintained. However, going back to a previous Exim
3984 release will lost any variables that are in spool files.
3986 PH/07 Two small changes when running in the test harness: increase delay when
3987 passing a TCP/IP connection to a new process, in case the original
3988 process has to generate a bounce, and remove special handling of
3989 127.0.0.2 (sic), which is no longer necessary.
3991 PH/08 Changed debug output of dbfn_open() flags from numbers to names, so as to
3992 be the same on different OS.
3994 PH/09 Moved a debug statement in filter processing to avoid a race problem when
3997 JJ/01 exipick: fixed bug where -b (brief) output option showed "Vars:"
3998 whether --show-vars was specified or not
4000 JJ/02 exipick: Added support for new ACL variable spool format introduced
4003 PH/10 Fixed another bug related to PH/04 above: if an incoming message had a
4004 syntactically invalid From: or Reply-to: line, and a filter used this to
4005 generate an autoreply, and therefore failed to obtain an address for the
4006 autoreply, Exim could try to deliver to a non-existent relative file
4007 name, causing unrelated and misleading errors. What now happens is that
4008 it logs this as a hard delivery error, but does not attempt to create a
4011 PH/11 The exinext utility has a -C option for testing purposes, but although
4012 the given file was scanned by exinext itself; it wasn't being passed on
4013 when Exim was called.
4015 PH/12 In the smtp transport, treat an explicit ECONNRESET error the same as
4016 an end-of-file indication when reading a command response.
4018 PH/13 Domain literals for IPv6 were not recognized unless IPv6 support was
4019 compiled. In many other places in Exim, IPv6 addresses are always
4020 recognized, so I have changed this. It also means that IPv4 domain
4021 literals of the form [IPV4:n.n.n.n] are now always recognized.
4023 PH/14 When a uid/gid is specified for the queryprogram router, it cannot be
4024 used if the router is not running as root, for example, when verifying at
4025 ACL time, or when using -bh. The debugging output from this situation was
4026 non-existent - all you got was a failure to exec. I have made two
4029 (a) Failures to set uid/gid, the current directory, or a process leader
4030 in a subprocess such as that created by queryprogram now generate
4031 suitable debugging output when -d is set.
4033 (b) The queryprogram router detects when it is not running as root,
4034 outputs suitable debugging information if -d is set, and then runs
4035 the subprocess without attempting to change uid/gid.
4037 PH/15 Minor change to Makefile for building test_host (undocumented testing
4040 PH/16 As discussed on the list in Nov/Dec: Exim no longer looks at the
4041 additional section of a DNS packet that returns MX or SRV records.
4042 Instead, it always explicitly searches for A/AAAA records. This avoids
4043 major problems that occur when a DNS server includes only records of one
4044 type (A or AAAA) in an MX/SRV packet. A byproduct of this change has
4045 fixed another bug: if SRV records were looked up and the corresponding
4046 address records were *not* found in the additional section, the port
4047 values from the SRV records were lost.
4049 PH/17 If a delivery to a pipe, file, or autoreply was deferred, Exim was not
4050 using the correct key (the original address) when searching the retry
4051 rules in order to find which one to use for generating the retry hint.
4053 PH/18 If quota_warn_message contains a From: header, Exim now refrains from
4054 adding the default one. Similarly, if it contains a Reply-To: header, the
4055 errors_reply_to option, if set, is not used.
4057 PH/19 When calculating a retry time, Exim used to measure the "time since
4058 failure" by looking at the "first failed" field in the retry record. Now
4059 it does not use this if it is later than than the arrival time of the
4060 message. Instead it uses the arrival time. This makes for better
4061 behaviour in cases where some deliveries succeed, thus re-setting the
4062 "first failed" field. An example is a quota failure for a huge message
4063 when small messages continue to be delivered. Without this change, the
4064 "time since failure" will always be short, possible causing more frequent
4065 delivery attempts for the huge message than are intended.
4066 [Note: This change was subsequently modified - see PH/04 for 4.62.]
4068 PH/20 Added $auth1, $auth2, $auth3 to contain authentication data (as well as
4069 $1, $2, $3) because the numerical variables can be reset during some
4070 expansion items (e.g. "match"), thereby losing the authentication data.
4072 PH/21 Make -bV show the size of off_t variables so that the test suite can
4073 decide whether to run tests for quotas > 2G.
4075 PH/22 Test the values given for quota, quota_filecount, quota_warn_threshold,
4076 mailbox_size, and mailbox_filecount in the appendfile transport. If a
4077 filecount value is greater than 2G or if a quota value is greater than 2G
4078 on a system where the size of off_t is not greater than 4, a panic error
4081 PH/23 When a malformed item such as 1.2.3/24 appears in a host list, it can
4082 never match. The debug and -bh output now contains an explicit error
4083 message indicating a malformed IPv4 address or mask.
4085 PH/24 An host item such as 1.2.3.4/abc was being treated as the IP address
4086 1.2.3.4 without a mask. Now it is not recognized as an IP address, and
4087 PH/23 above applies.
4089 PH/25 Do not write to syslog when running in the test harness. The only
4090 occasion when this arises is a failure to open the main or panic logs
4091 (for which there is an explicit test).
4093 PH/26 Added the /no_tell option to "control=freeze".
4095 PH/27 If a host name lookup failed very early in a connection, for example, if
4096 the IP address matched host_lookup and the reverse lookup yielded a name
4097 that did not have a forward lookup, an error message of the form "no IP
4098 address found for host xxx.xxx.xxx (during SMTP connection from NULL)"
4099 could be logged. Now it outputs the IP address instead of "NULL".
4101 PH/28 An enabling patch from MH: add new function child_open_exim2() which
4102 allows the sender and the authenticated sender to be set when
4103 submitting a message from within Exim. Since child_open_exim() is
4104 documented for local_scan(), the new function should be too.
4106 PH/29 In GnuTLS, a forced expansion failure for tls_privatekey was not being
4107 ignored. In both GnuTLS and OpenSSL, an expansion of tls_privatekey that
4108 results in an empty string is now treated as unset.
4110 PH/30 Fix eximon buffer overflow bug (Bugzilla #73).
4112 PH/31 Added sender_verify_fail logging option.
4114 PH/32 In November 2003, the code in Exim that added an empty Bcc: header when
4115 needed by RFC 822 but not by RFC 2822 was commented out. I have now
4116 tidied the source and removed it altogether.
4118 PH/33 When a queue run was abandoned because the load average was too high, a
4119 log line was always written; now it is written only if the queue_run log
4120 selector is set. In addition, the log line for abandonment now contains
4121 information about the queue run such as the pid. This is always present
4122 in "start" and "stop" lines but was omitted from the "abandon" line.
4124 PH/34 Omit spaces between a header name and the colon in the error message that
4125 is given when verify = headers_syntax fails (if there are lots of them,
4126 the message gets confusing).
4128 PH/35 Change the default for dns_check_names_pattern to allow slashes within
4129 names, as there are now some PTR records that contain slashes. This check
4130 is only to protect against broken name servers that fall over on strange
4131 characters, so the fact that it applies to all lookups doesn't matter.
4133 PH/36 Now that the new test suite is complete, we can remove some of the
4134 special code in Exim that was needed for the old test suite. For example,
4135 sorting DNS records because real resolvers return them in an arbitrary
4136 order. The new test suite's fake resolver always returns records in the
4139 PH/37 When running in the test harness, use -odi for submitted messages (e.g.
4140 bounces) except when queue_only is set, to avoid logging races between
4141 the different processes.
4143 PH/38 Panic-die if .include specifies a non-absolute path.
4145 PH/39 A tweak to the "H" retry rule from its user.
4147 JJ/03 exipick: Removed parentheses from 'next' and 'last' calls that specified
4148 a label. They prevented compilation on older perls.
4150 JJ/04 exipick: Refactored code to prevent implicit split to @_ which caused
4151 a warning to be raised on newish perls.
4153 JJ/05 exipick: Fixed bug where -bpc always showed a count of all messages
4154 on queue. Changes to match documented behaviour of showing count of
4155 messages matching specified criteria.
4157 PH/40 Changed the default ident timeout from 30s to 5s.
4159 PH/41 Added support for the use of login_cap features, on those BSD systems
4160 that have them, for controlling the resources used by pipe deliveries.
4162 PH/42 The content-scanning code uses fopen() to create files in which to put
4163 message data. Previously it was not paying any attention to the mode of
4164 the files. Exim runs with umask(0) because the rest of the code creates
4165 files with open(), and sets the required mode explicitly. Thus, these
4166 files were ending up world-writeable. This was not a big issue, because,
4167 being within the spool directory, they were not world-accessible. I have
4168 created a function called modefopen, which takes an additional mode
4169 argument. It sets umask(777), creates the file, chmods it to the required
4170 mode, then resets the umask. All the relevant calls to fopen() in the
4171 content scanning code have been changed to use this function.
4173 PH/43 If retry_interval_max is set greater than 24 hours, it is quietly reset
4174 to 24 hours. This avoids potential overflow problems when processing G
4175 and H retry rules. I suspect nobody ever tinkers with this value.
4177 PH/44 Added STRIP_COMMAND=/usr/bin/strip to the FreeBSD Makefile.
4179 PH/45 When the plaintext authenticator is running as a client, the server's
4180 challenges are checked to ensure they are valid base64 strings. By
4181 default, the authentication attempt is cancelled if an invalid string is
4182 received. Setting client_ignore_invalid_base64 true ignores these errors.
4183 The decoded challenge strings are now placed in $auth1, $auth2, etc. as
4184 they are received. Thus, the responses can be made to depend on the
4185 challenges. If an invalid string is ignored, an empty string is placed in
4188 PH/46 Messages that are created by the autoreply transport now contains a
4189 References: header, in accordance with RFCs 2822 and 3834.
4191 PH/47 Added authenticated_sender_force to the smtp transport.
4193 PH/48 The ${prvs expansion was broken on systems where time_t was long long.
4195 PH/49 Installed latest patch from the Sieve maintainer.
4197 PH/50 When an Exim quota was set without a file count quota, and mailbox_size
4198 was also set, the appendfile transport was unnecessarily scanning a
4199 directory of message files (e.g. for maildir delivery) to find the count
4200 of files (along with the size), even though it did not need this
4201 information. It now does the scan only if it needs to find either the
4202 size of the count of files.
4204 PH/51 Added ${time_eval: to convert Exim time strings into seconds.
4206 PH/52 Two bugs concerned with error handling when the smtp transport is
4209 (i) Exim was not creating retry information for temporary errors given
4210 for individual recipients after the DATA command when the smtp transport
4211 was used in LMTP mode. This meant that they could be retried too
4212 frequently, and not timed out correctly.
4214 (ii) Exim was setting the flag that allows error details to be returned
4215 for LMTP errors on RCPT commands, but not for LMTP errors for individual
4216 recipients that were returned after the DATA command.
4218 PH/53 This is related to PH/52, but is more general: for any failing address,
4219 when detailed error information was permitted to be returned to the
4220 sender, but the error was temporary, then after the final timeout, only
4221 "retry timeout exceeded" was returned. Now it returns the full error as
4222 well as "retry timeout exceeded".
4224 PH/54 Added control=allow_auth_unadvertised, as it seems there are clients that
4225 do this, and (what is worse) MTAs that accept it.
4227 PH/55 Added the add_header modified to ACLs. The use of "message" with "warn"
4228 will now be deprecated.
4230 PH/56 New os.c-cygwin from the Cygwin maintainer.
4232 JJ/06 exipick: added --unsorted option to allow unsorted output in all output
4233 formats (previously only available in exim formats via -bpr, -bpru,
4234 and -bpra. Now also available in native and exiqgrep formats)
4236 JJ/07 exipick: added --freeze and --thaw options to allow faster interaction
4237 with very large, slow to parse queues
4239 JJ/08 exipick: added ! as generic prefix to negate any criteria format
4241 JJ/09 exipick: miscellaneous performance enhancements (~24% improvements)
4243 PH/57 Tidies in SMTP dialogue display in debug output: (i) It was not showing
4244 responses to authentication challenges, though it was showing the
4245 challenges; (ii) I've removed the CR characters from the debug output for
4248 PH/58 Allow for the insertion of a newline as well as a space when a string
4249 is turned into more than one encoded-word during RFC 2047 encoding. The
4250 Sieve code now uses this.
4252 PH/59 Added the following errors that can be detected in retry rules: mail_4xx,
4253 data_4xx, lost_connection, tls_required.
4255 PH/60 When a VRFY deferred or FAILED, the log message rather than the user
4256 message was being sent as an SMTP response.
4258 PH/61 Add -l and -k options to exicyclog.
4260 PH/62 When verifying, if an address was redirected to one new address, so that
4261 verification continued, and the new address failed or deferred after
4262 having set something in $address_data, the value of $address_data was not
4263 passed back to the ACL. This was different to the case when no
4264 redirection occurred. The value is now passed back in both cases.
4266 PH/63 Changed the macro HAVE_LOGIN_CAP (see PH/41 for this release above) to
4267 HAVE_SETCLASSRESOURCES because there are different APIs in use that all
4268 use login_cap.h, so on its own it isn't the distinguishing feature. The
4269 new name refers directly to the setclassresources() function.
4271 PH/65 Added configuration files for NetBSD3.
4273 PH/66 Updated OS/Makefile-HP-UX for gcc 4.1.0 with HP-UX 11.
4275 PH/67 Fixed minor infelicity in the sorting of addresses to ensure that IPv6
4276 is preferred over IPv4.
4278 PH/68 The bounce_return_message and bounce_return_body options were not being
4279 honoured for bounces generated during the reception of non-SMTP messages.
4280 In particular, this applied to messages rejected by the ACL. This bug has
4281 been fixed. However, if bounce_return_message is true and bounce_return_
4282 body is false, the headers that are returned for a non-SMTP message
4283 include only those that have been read before the error was detected.
4284 (In the case of an ACL rejection, they have all been read.)
4286 PH/69 The HTML version of the specification is now built in a directory called
4287 spec_html instead of spec.html, because the latter looks like a path with
4288 a MIME-type, and this confuses some software.
4290 PH/70 Catch two compiler warnings in sieve.c.
4292 PH/71 Fixed an obscure and subtle bug (thanks Alexander & Matthias). The
4293 function verify_get_ident() calls ip_connect() to connect a socket, but
4294 if the "connect()" function timed out, ip_connect() used to close the
4295 socket. However, verify_get_ident() also closes the socket later, and in
4296 between Exim writes to the log, which may get opened at this point. When
4297 the socket was closed in ip_connect(), the log could get the same file
4298 descriptor number as the socket. This naturally causes chaos. The fix is
4299 not to close the socket in ip_connect(); the socket should be closed by
4300 the function that creates it. There was only one place in the code where
4301 this was missing, in the iplookup router, which I don't think anybody now
4302 uses, but I've fixed it anyway.
4304 PH/72 Make dns_again_means_nonexist apply to lookups using gethostbyname() as
4305 well as to direct DNS lookups. Otherwise the handling of names in host
4306 lists is inconsistent and therefore confusing.
4312 PH/01 Two changes to the default runtime configuration:
4314 (1) Move the checks for relay_from_hosts and authenticated clients from
4315 after to before the (commented out) DNS black list checks.
4317 (2) Add control=submission to the relay_from_hosts and authenticated
4318 clients checks, on the grounds that messages accepted by these
4319 statements are most likely to be submissions.
4321 PH/02 Several tidies to the handling of ${prvs and ${prvscheck:
4323 (1) Generate an error if the third argument for the ${prvs expansion is
4326 (2) Treat a missing third argument of ${prvscheck as if it were an empty
4329 (3) Reset the variables that are obtained from the first argument of
4330 ${prvscheck and used in the second argument before leaving the code,
4331 because their memory is reclaimed, so using them afterwards may do
4334 (4) Tidy up the code for expanding the arguments of ${prvscheck one by
4335 one (it's much easier than Tom thought :-).
4337 (5) Because of (4), we can now allow for the use of $prvscheck_result
4338 inside the third argument.
4340 PH/03 For some reason, the default setting of PATH when running a command from
4341 a pipe transport was just "/usr/bin". I have changed it to
4344 PH/04 SUPPORT_TRANSLATE_IP_ADDRESS and MOVE_FROZEN_MESSAGES did not cause
4345 anything to be listed in the output from -bV.
4347 PH/05 When a filter generated an autoreply, the entire To: header line was
4348 quoted in the delivery log line, like this:
4350 => >A.N.Other <ano@some.domain> <original@ddress> ...
4352 This has been changed so that it extracts the operative address. There
4353 may be more than one such address. If so, they are comma-separated, like
4356 => >ano@some.domain,ona@other.domain <original@ddress> ...
4358 PH/06 When a client host used a correct literal IP address in a HELO or EHLO
4359 command, (for example, EHLO [1.2.3.4]) and the client's IP address was
4360 not being looked up in the rDNS to get a host name, Exim was showing the
4361 IP address twice in Received: lines, even though the IP addresses were
4362 identical. For example:
4364 Received: from [1.2.3.4] (helo=[1.2.3.4])
4366 However, if the real host name was known, it was omitting the HELO data
4367 if it matched the actual IP address. This has been tidied up so that it
4368 doesn't show the same IP address twice.
4370 PH/07 When both +timestamp and +memory debugging was on, the value given by
4371 $tod_xxx expansions could be wrong, because the tod_stamp() function was
4372 called by the debug printing, thereby overwriting the timestamp buffer.
4373 Debugging no longer uses the tod_stamp() function when +timestamp is set.
4375 PH/08 When the original message was included in an autoreply transport, it
4376 always said "this is a copy of the message, including all the headers",
4377 even if body_only or headers_only was set. It now gives an appropriate
4380 PH/09 Applied a patch from the Sieve maintainer which:
4382 o fixes some comments
4383 o adds the (disabled) notify extension core
4384 o adds some debug output for the result of if/elsif tests
4385 o points to the current vacation draft in the documentation
4386 and documents the missing references header update
4390 o fixes a bug in processing the envelope test (when testing
4391 multiple envelope elements, the last element determined the
4394 PH/10 Exim was violating RFC 3834 ("Recommendations for Automatic Responses to
4395 Electronic Mail") by including:
4397 Auto-submitted: auto-generated
4399 in the messages that it generates (bounce messages and others, such as
4400 warnings). In the case of bounce messages for non-SMTP messages, there was
4401 also a typo: it was using "Auto_submitted" (underscore instead of
4402 hyphen). Since every message generated by Exim is necessarily in response
4403 to another message, thes have all been changed to:
4405 Auto-Submitted: auto-replied
4407 in accordance with these statements in the RFC:
4409 The auto-replied keyword:
4411 - SHOULD be used on messages sent in direct response to another
4412 message by an automatic process,
4414 - MUST NOT be used on manually-generated messages,
4416 - MAY be used on Delivery Status Notifications (DSNs) and Message
4417 Disposition Notifications (MDNs),
4419 - MUST NOT be used on messages generated by automatic or periodic
4420 processes, except for messages which are automatic responses to
4423 PH/11 Added "${if def:sender_address {(envelope-from <$sender_address>)\n\t}}"
4424 to the default Received: header definition.
4426 PH/12 Added log selector acl_warn_skipped (default on).
4428 PH/13 After a successful wildlsearch lookup, discard the values of numeric
4429 variables because (a) they are in the wrong storage pool and (b) even if
4430 they were copied, it wouldn't work properly because of the caching.
4432 PH/14 Add check_rfc2047_length to disable enforcement of RFC 2047 length
4433 checking when decoding. Apparently there are clients that generate
4434 overlong encoded strings. Why am I not surprised?
4436 PH/15 If the first argument of "${if match_address" was not empty, but did not
4437 contain an "@" character, Exim crashed. Now it writes a panic log message
4438 and treats the condition as false.
4440 PH/16 In autoreply, treat an empty string for "once" the same as unset.
4442 PH/17 A further patch from the Sieve maintainer: "Introduce the new Sieve
4443 extension "envelope-auth". The code is finished and in agreement with
4444 other implementations, but there is no documentation so far and in fact,
4445 nobody wrote the draft yet. This extension is currently #undef'ed, thus
4446 not changing the active code.
4448 Print executed "if" and "elsif" statements when debugging is used. This
4449 helps a great deal to understand what a filter does.
4451 Document more things not specified clearly in RFC3028. I had all this
4452 sorted out, when out of a sudden new issues came to my mind. Oops."
4454 PH/18 Exim was not recognizing the "net-" search type prefix in match_ip lists
4457 PH/19 Exim expands the IPv6 address given to -bh to its full non-abbreviated
4458 canonical form (as documented). However, after a host name lookup from
4459 the IP address, check_host() was doing a simple string comparison with
4460 addresses acquired from the DNS when checking that the found name did
4461 have the original IP as one of its addresses. Since any found IPv6
4462 addresses are likely to be in abbreviated form, the comparison could
4463 fail. Luckily, there already exists a function for doing the comparison
4464 by converting both addresses to binary, so now that is used instead of
4465 the text comparison.
4467 PH/20 There was another similar case to PH/19, when a complete host name was
4468 given in a host list; looking up its IP address could give an abbreviated
4469 form, whereas the current host's name might or might not be abbreviated.
4470 The same fix has been applied.
4476 PH/01 The ${base62: operator adjusted itself to base 36 when BASE_62 was
4477 set to 36 (for Darwin and Cygwin), but the ${base62d: operator did not.
4480 PH/02 Two minor problems detected in Cygwin: the os.{c,h} files had lost */ on
4481 the CVS lines, and there was a missing #if HAVE_IPV6 in host.c.
4483 PH/03 Typo: missing ".o" in src/pcre/Makefile.
4485 PH/04 Tighten up "personal" tests: Instead of testing for any "List-"
4486 header line, restrict the check to what is listed in RFCs 2369 and 2929.
4487 Also, for "Auto-Submitted", treat anything other than "no" as
4488 non-personal, in accordance with RFC 3834. (Previously it treated
4489 anything starting "auto-" as non-personal.)
4491 TF/01 The control=submission/name=... option had a problem with syntax
4492 errors if the name included a slash character. The /name= option
4493 now slurps the rest of the string, so it can include any characters
4494 but it must come last in the list of options (after /sender_retain
4497 PH/05 Some modifications to the interface to the fake nameserver for the new
4505 TK/01 Added the "success_on_redirect" address verification option. See
4506 NewStuff for rationale and an example.
4508 PH/01 Added support for SQLite, basic code supplied by David Woodhouse.
4510 PH/02 Patch to exigrep to allow it to work on syslog lines.
4512 PH/03 When creating an mbox file for a virus/spam scan, use fseek() instead of
4513 fread() to skip over the body file's header line, because in Cygwin the
4514 header line is locked and is inaccessible.
4516 PH/04 Added $message_exim_id, ultimately to replace $message_id (they will both
4517 co-exist for some time) to make it clear that it is the Exim ID that is
4518 referenced, not the Message-ID: header line.
4520 PH/05 Replaced all Tom's calls to snprintf() with calls to the internal
4521 string_format() function, because snprintf() does not exist on all
4524 PH/06 The use of forbid_filter_existstest now also locks out the use of the
4525 ${stat: expansion item.
4527 PH/07 Changed "SMTP protocol violation: synchronization error" into "SMTP
4528 protocol synchronization error", to keep the pedants happy.
4530 PH/08 Arrange for USE_INET_NTOA_FIX to be set in config.h for AIX systems as
4531 well as for IRIX systems, when gcc is being used. See the host.c source
4534 PH/09 Installed latest Cygwin configuration files from the Cygwin maintainer.
4536 PH/10 Named domain lists were not working if used in a queue_smtp_domains
4539 PH/11 Added support for the IGNOREQUOTA extension to LMTP, both to the lmtp
4540 transport and to the smtp transport in LMTP mode.
4542 TK/02 Remove one case of BASE64 error detection FTTB (undocumented anyway).
4544 PH/12 There was a missing call to search_tidyup() before the fork() in rda.c to
4545 run a filter in a subprocess. This could lead to confusion in subsequent
4546 lookups in the parent process. There should also be a search_tidyup() at
4547 the end of the subprocess.
4549 PH/13 Previously, if "verify = helo" was set in an ACL, the condition was true
4550 only if the host matched helo_try_verify_hosts, which caused the
4551 verification to occur when the EHLO/HELO command was issued. The ACL just
4552 tested the remembered result. Now, if a previous verification attempt has
4553 not happened, "verify = helo" does it there and then.
4555 JJ/01 exipick: added $message_exim_id variable (see 4.53-PH/04)
4557 TK/03 Fix log output including CR from clamd.
4559 PH/14 A reference to $reply_address when Reply-to: was empty and From: did not
4560 exist provoked a memory error which could cause a segfault.
4562 PH/15 Installed PCRE 6.2
4564 PH/17 Defined BIND_8_COMPAT in the Darwin os.h file.
4566 PH/18 Reversed 4.52/PH/17 because the HP-UX user found it wasn't the cause
4567 of the problem. Specifically, suggested +O2 rather than +O1 for the
4570 PH/19 Added sqlite_lock_timeout option (David Woodhouse's patch).
4572 PH/20 If a delivery was routed to a non-standard port by means of an SRV
4573 record, the port was not correctly logged when the outgoing_port log
4574 selector was set (it logged the transort's default port).
4576 PH/21 Added support for host-specific ports to manualroute, queryprogram,
4577 fallback_hosts, and "hosts" in the smtp transport.
4579 PH/22 If the log selector "outgoing_port" is set, the port is now also given on
4580 host errors such as "Connection refused".
4582 PH/23 Applied a patch to fix problems with exim-4.52 while doing radius
4583 authentication with radiusclient 0.4.9:
4585 - Error returned from rc_read_config was caught wrongly
4586 - Username/password not passed on to radius server due to wrong length.
4588 The presumption is that some radiusclient API changes for 4.51/PH/17
4589 were not taken care of correctly. The code is still untested by me (my
4590 Linux distribution still has 0.3.2 of radiusclient), but it was
4591 contributed by a Radius user.
4593 PH/24 When doing a callout, the value of $domain wasn't set correctly when
4594 expanding the "port" option of the smtp transport.
4596 TK/04 MIME ACL: Fix buffer underrun that occurs when EOF condition is met
4597 while reading a MIME header. Thanks to Tom Hughes for a patch.
4599 PH/24 Include config.h inside local_scan.h so that configuration settings are
4602 PH/25 Make $smtp_command_argument available after all SMTP commands. This means
4603 that in an ACL for RCPT (for example), you can examine exactly what was
4606 PH/26 Exim was recognizing IPv6 addresses of the form [IPv6:....] in EHLO
4607 commands, but it was not correctly comparing the address with the actual
4608 client host address. Thus, it would show the EHLO address in Received:
4609 header lines when this was not necessary.
4611 PH/27 Added the % operator to ${eval:}.
4613 PH/28 Exim tries to create and chdir to its spool directory when it starts;
4614 it should be ignoring failures (because with -C, for example, it has lost
4615 privilege). It wasn't ignoring creation failures other than "already
4618 PH/29 Added "crypteq" to the list of supported features that Exim outputs when
4621 PH/30 Fixed (presumably very longstanding) bug in exim_dbmbuild: if it failed
4622 because an input line was too long, either on its own, or by virtue of
4623 too many continuations, the temporary file was not being removed, and the
4624 return code was incorrect.
4626 PH/31 Missing "BOOL" in function definition in filtertest.c.
4628 PH/32 Applied Sieve patches from the maintainer.
4630 TK/05 Domainkeys: Accomodate for a minor API change in libdomainkeys 0.67.
4632 PH/33 Added "verify = not_blind".
4634 PH/34 There are settings for CHOWN_COMMAND and MV_COMMAND that can be used in
4635 Local/Makefile (with some defaults set). These are used in built scripts
4636 such as exicyclog, but they have never been used in the exim_install
4637 script (though there are many overriding facilities there). I have
4638 arranged that the exim_install script now takes note of these two
4641 PH/35 Installed configuration files for Dragonfly.
4643 PH/36 When a locally submitted message by a trusted user did not contain a
4644 From: header, and the sender address was obtained from -f or from an SMTP
4645 MAIL command, and the trusted user did not use -F to supply a sender
4646 name, $originator_name was incorrectly used when constructing a From:
4647 header. Furthermore, $originator_name was used for submission mode
4648 messages from external hosts without From: headers in a similar way,
4649 which is clearly wrong.
4651 PH/37 Added control=suppress_local_fixups.
4653 PH/38 When log_selector = +received_sender was set, and the addition of the
4654 sender made the log line's construction buffer exactly full, or one byte
4655 less than full, an overflow happened when the terminating "\n" was
4658 PH/39 Added a new log selector, "unknown_in_list", which provokes a log entry
4659 when the result of a list match is failure because a DNS lookup failed.
4661 PH/40 RM_COMMAND is now used in the building process.
4663 PH/41 Added a "distclean" target to the top-level Makefile; it deletes all
4664 the "build-* directories that it finds.
4666 PH/42 (But a TF fix): In a domain list, Exim incorrectly matched @[] if the IP
4667 address in a domain literal was a prefix of an interface address.
4669 PH/43 (Again a TF fix): In the dnslookup router, do not apply widen_domains
4670 when verifying a sender address, unless rewrite_headers is false.
4672 PH/44 Wrote a long comment about why errors_to addresses are verified as
4673 recipients, not senders.
4675 TF/01 Add missing LIBS=-lm to OS/Makefile-OpenBSD which was overlooked when
4676 the ratelimit ACL was added.
4678 PH/45 Added $smtp_command for the full command (cf $smtp_command_argument).
4680 PH/46 Added extra information about PostgreSQL errors to the error string.
4682 PH/47 Added an interface to a fake DNS resolver for use by the new test suite,
4683 avoiding the need to install special zones in a real server. This is
4684 backwards compatible; if it can't find the fake resolver, it drops back.
4685 Thus, both old and new test suites can be run.
4687 TF/02 Added util/ratelimit.pl
4689 TF/03 Minor fix to the ratelimit code to improve its behaviour in case the
4690 clock is set back in time.
4692 TF/04 Fix the ratelimit support in exim_fixdb. Patch provided by Brian
4693 Candler <B.Candler@pobox.com>.
4695 TF/05 The fix for PH/43 was not completely correct; widen_domains is always
4696 OK for addresses that are the result of redirections.
4698 PH/48 A number of further additions for the benefit of the new test suite,
4699 including a fake gethostbyname() that interfaces to the fake DNS resolver
4702 TF/06 The fix for widen_domains has also been applied to qualify_single and
4703 search_parents which are the other dnslookup options that can cause
4706 PH/49 Michael Haardt's randomized retrying, but as a separate retry parameter
4709 PH/50 Make never_users, trusted_users, admin_groups, trusted_groups expandable.
4711 TF/07 Exim produced the error message "an SRV record indicated no SMTP
4712 service" if it encountered an MX record with an empty target hostname.
4713 The message is now "an MX or SRV record indicated no SMTP service".
4715 TF/08 Change PH/13 introduced the possibility that verify=helo may defer,
4716 if the DNS of the sending site is misconfigured. This is quite a
4717 common situation. This change restores the behaviour of treating a
4718 helo verification defer as a failure.
4720 PH/51 If self=fail was set on a router, the bounce message did not include the
4721 actual error message.
4727 TF/01 Added support for Client SMTP Authorization. See NewStuff for details.
4729 PH/01 When a transport filter timed out in a pipe delivery, and the pipe
4730 command itself ended in error, the underlying message about the transport
4731 filter timeout was being overwritten with the pipe command error. Now the
4732 underlying error message should be appended to the second error message.
4734 TK/01 Fix poll() being unavailable on Mac OSX 10.2.
4736 PH/02 Reduce the amount of output that "make" produces by default. Full output
4737 can still be requested.
4739 PH/03 The warning log line about a condition test deferring for a "warn" verb
4740 was being output only once per connection, rather than after each
4741 occurrence (because it was using the same function as for successful
4742 "warn" verbs). This seems wrong, so I have changed it.
4744 TF/02 Two buglets in acl.c which caused Exim to read a few bytes of memory that
4745 it should not have, which might have caused a crash in the right
4746 circumstances, but probably never did.
4748 PH/04 Installed a modified version of Tony Finch's patch to make submission
4749 mode fix the return path as well as the Sender: header line, and to
4750 add a /name= option so that you can make the user's friendly name appear
4753 TF/03 Added the control = fakedefer ACL modifier.
4755 TF/04 Added the ratelimit ACL condition. See NewStuff for details. Thanks to
4756 Mark Lowes for thorough testing.
4758 TK/02 Rewrote SPF support to work with libspf2 versions >1.2.0.
4760 TK/03 Merged latest SRS patch from Miles Wilton.
4762 PH/05 There's a shambles in IRIX6 - it defines EX_OK in unistd.h which conflicts
4763 with the definition in sysexits.h (which is #included earlier).
4764 Fortunately, Exim does not actually use EX_OK. The code used to try to
4765 preserve the sysexits.h value, by assuming that macro definitions were
4766 scanned for macro replacements. I have been disabused of this notion,
4767 so now the code just undefines EX_OK before #including unistd.h.
4769 PH/06 There is a timeout for writing blocks of data, set by, e.g. data_timeout
4770 in the smtp transport. When a block could not be written in a single
4771 write() function, the timeout was being re-applied to each part-write.
4772 This seems wrong - if the receiver was accepting one byte at a time it
4773 would take for ever. The timeout is now adjusted when this happens. It
4774 doesn't have to be particularly precise.
4776 TK/04 Added simple SPF lookup method in EXPERIMENTAL_SPF. See NewStuff for
4777 details. Thanks to Chris Webb <chris@arachsys.com> for the patch!
4779 PH/07 Added "fullpostmaster" verify option, which does a check to <postmaster>
4780 without a domain if the check to <postmaster@domain> fails.
4782 SC/01 Eximstats: added -xls and the ability to specify output files
4783 (patch written by Frank Heydlauf).
4785 SC/02 Eximstats: use FileHandles for outputting results.
4787 SC/03 Eximstats: allow any combination of xls, txt, and html output.
4789 SC/04 Eximstats: fixed display of large numbers with -nvr option
4791 SC/05 Eximstats: fixed merging of reports with empty tables.
4793 SC/06 Eximstats: added the -include_original_destination flag
4795 SC/07 Eximstats: removed tabs and trailing whitespace.
4797 TK/05 Malware: Improve on aveserver error handling. Patch from Alex Miller.
4799 TK/06 MBOX spool code: Add real "From " MBOX separator line
4800 so the .eml file is really in mbox format (even though
4801 most programs do not really care). Patch from Alex Miller.
4803 TK/07 MBOX spool code: Add X-Envelope-From: and X-Envelope-To: headers.
4804 The latter is generated from $received_to and is only set if the
4805 message has one envelope recipient. SA can use these headers,
4806 obviously out-of-the-box. Patch from Alex Miller.
4808 PH/08 The ${def test on a variable was returning false if the variable's
4809 value was "0", contrary to what the specification has always said!
4810 The result should be true unless the variable is empty.
4812 PH/09 The syntax error of a character other than { following "${if
4813 def:variable_name" (after optional whitespace) was not being diagnosed.
4814 An expansion such as ${if def:sender_ident:{xxx}{yyy}} in which an
4815 accidental colon was present, for example, could give incorrect results.
4817 PH/10 Tidied the code in a number of places where the st_size field of a stat()
4818 result is used (not including appendfile, where other changes are about
4821 PH/11 Upgraded appendfile so that quotas larger than 2G are now supported.
4822 This involved changing a lot of size variables from int to off_t. It
4823 should work with maildirs and everything.
4825 TK/08 Apply fix provided by Michael Haardt to prevent deadlock in case of
4826 spamd dying while we are connected to it.
4828 TF/05 Fixed a ${extract error message typo reported by Jeremy Harris
4831 PH/12 Applied Alex Kiernan's patch for the API change for the error callback
4832 function for BDB 4.3.
4834 PH/13 Changed auto_thaw such that it does not apply to bounce messages.
4836 PH/14 Imported PCRE 6.0; this was more than just a trivial operation because
4837 the sources for PCRE have been re-arranged and more files are now
4840 PH/15 The code I had for printing potentially long long variables in PH/11
4841 above was not the best (it lost precision). The length of off_t variables
4842 is now inspected at build time, and an appropriate printing format (%ld
4843 or %lld) is chosen and #defined by OFF_T_FMT. We also define LONGLONG_T
4844 to be "long long int" or "long int". This is needed for the internal
4845 formatting function string_vformat().
4847 PH/16 Applied Matthew Newton's patch to exicyclog: "If log_file_path is set in
4848 the configuration file to be ":syslog", then the script "guesses" where
4849 the logs files are, rather than using the compiled in default. In our
4850 case the guess is not the same as the compiled default, so the script
4851 suddenly stopped working when I started to use syslog. The patch checks
4852 to see if log_file_path is "". If so, it attempts to read it from exim
4853 with no configuration file to get the compiled in version, before it
4854 falls back to the previous guessing code."
4856 TK/09 Added "prvs" and "prvscheck" expansion items. These help a lot with
4857 implementing BATV in an Exim configuration. See NewStuff for the gory
4860 PH/17 Applied Michael Haardt's patch for HP-UX, affecting only the os.h and
4861 Makefile that are specific to HP-UX.
4863 PH/18 If the "use_postmaster" option was set for a recipient callout together
4864 with the "random" option, the postmaster address was used as the MAIL
4865 FROM address for the random test, but not for the subsequent recipient
4866 test. It is now used for both.
4868 PH/19 Applied Michael Haardt's patch to update Sieve to RFC3028bis. "The
4869 patch removes a few documentation additions to RFC 3028, because the
4870 latest draft now contains them. It adds the new en;ascii-case comparator
4871 and a new error check for 8bit text in MIME parts. Comparator and
4872 require names are now matched exactly. I enabled the subaddress
4873 extension, but it is not well tested yet (read: it works for me)."
4875 PH/20 Added macros for time_t as for off_t (see PH/15 above) and used them to
4876 rework some of the code of TK/09 above to avoid the hardwired use of
4877 "%lld" and "long long". Replaced the call to snprintf() with a call to
4880 PH/21 Added some other messages to those in 4.51/PH/42, namely "All relevant MX
4881 records point to non-existent hosts", "retry timeout exceeded", and
4882 "retry time not reached for any host after a long failure period".
4884 PH/22 Fixed some oversights/typos causing bugs when Exim is compiled with
4885 experimental DomainKeys support:
4887 (1) The filter variables $n0-$n9 and $sn0-$sn9 were broken.
4888 (2) On an error such as an illegally used "control", the wrong name for
4889 the control was given.
4891 These problems did NOT occur unless DomainKeys support was compiled.
4893 PH/23 Added daemon_startup_retries and daemon_startup_sleep.
4895 PH/24 Added ${if match_ip condition.
4897 PH/25 Put debug statements on either side of calls to EXIM_DBOPEN() for hints
4898 databases so that it will be absolutely obvious if a crash occurs in the
4899 DB library. This is a regular occurrence (often caused by mis-matched
4902 PH/26 Insert a lot of missing (void) casts for functions such as chown(),
4903 chmod(), fcntl(), sscanf(), and other functions from stdio.h. These were
4904 picked up on a user's system that detects such things. There doesn't seem
4905 to be a gcc warning option for this - only an attribute that has to be
4906 put on the function's prototype. It seems that in Fedora Core 4 they have
4907 set this on a number of new functions. No doubt there will be more in due
4910 PH/27 If a dnslookup or manualroute router is set with verify=only, it need not
4911 specify a transport. However, if an address that was verified by such a
4912 router was the subject of a callout, Exim crashed because it tried to
4913 read the rcpt_include_affixes from the non-existent transport. Now it
4914 just assumes that the setting of that option is false. This bug was
4915 introduced by 4.51/PH/31.
4917 PH/28 Changed -d+all to exclude +memory, because that information is very
4918 rarely of interest, but it makes the output a lot bigger. People tend to
4919 do -d+all out of habit.
4921 PH/29 Removed support for the Linux-libc5 build, as it is obsolete and the
4922 code in os-type was giving problems when libc.so lives in lib64, like on
4925 PH/30 Exim's DNS code uses the original T_xxx names for DNS record times. These
4926 aren't the modern standard, and it seems that some systems' include files
4927 don't always have them. Exim was already checking for some of the newer
4928 ones like T_AAAA, and defining it itself. I've added checks for all the
4929 record types that Exim uses.
4931 PH/31 When using GnuTLS, if the parameters cache file did not exist, Exim was
4932 not automatically generating a new one, as it is supposed to. This
4933 prevented TLS from working. If the file did exist, but contained invalid
4934 data, a new version was generated, as expected. It was only the case of a
4935 non-existent file that was broken.
4937 TK/10 Domainkeys: Fix a bug in verification that caused a crash in conjunction
4938 with a change in libdomainkeys > 0.64.
4940 TK/11 Domainkeys: Change the logic how the "testing" policy flag is retrieved
4941 from DNS. If the selector record carries the flag, it now has
4942 precedence over the domain-wide flag.
4944 TK/12 Cleared some compiler warnings related to SPF, SRS and DK code.
4946 PH/32 In mua_wrapper mode, if an smtp transport configuration error (such as
4947 the use of a port name that isn't defined in /etc/services) occurred, the
4948 message was deferred as in a normal delivery, and thus remained on the
4949 spool, instead of being failed because of the mua_wrapper setting. This
4950 is now fixed, and I tidied up some of the mua_wrapper messages at the
4953 SC/08 Eximstats: whilst parsing the mainlog(s), store information about
4954 the messages in a hash of arrays rather than using individual hashes.
4955 This is a bit cleaner and results in dramatic memory savings, albeit
4956 at a slight CPU cost.
4958 SC/09 Eximstats: added the -show_rt<list> and the -show_dt<list> flags
4959 as requested by Marc Sherman.
4961 SC/10 Eximstats: added histograms for user specified patterns as requested
4964 SC/11 Eximstats: v1.43 - bugfix for pattern histograms with -h0 specified.
4966 PH/33 Patch from the Cygwin maintainer to add "b" to all occurences of
4967 fopen() in the content-scanning modules that did not already have it.
4973 TK/01 Added Yahoo DomainKeys support via libdomainkeys. See
4974 doc/experimental-spec.txt for details. (http://domainkeys.sf.net)
4976 TK/02 Fix ACL "control" statement not being available in MIME ACL.
4978 TK/03 Fix ACL "regex" condition not being available in MIME ACL.
4980 PH/01 Installed a patch from the Sieve maintainer that allows -bf to be used
4981 to test Sieve filters that use "vacation".
4983 PH/02 Installed a slightly modified version of Nikos Mavrogiannopoulos' patch
4984 that changes the way the GnuTLS parameters are stored in the cache file.
4985 The new format can be generated externally. For backward compatibility,
4986 if the data in the cache doesn't make sense, Exim assumes it has read an
4987 old-format file, and it generates new data and writes a new file. This
4988 means that you can't go back to an older release without removing the
4991 PH/03 A redirect router that has both "unseen" and "one_time" set does not
4992 work if there are any delivery delays because "one_time" forces the
4993 parent to be marked "delivered", so its unseen clone is never tried
4994 again. For this reason, Exim now forbids the simultaneous setting of
4997 PH/04 Change 4.11/85 fixed an obscure bug concerned with addresses that are
4998 redirected to themselves ("homonym" addresses). Read the long ChangeLog
4999 entry if you want to know the details. The fix, however, neglected to
5000 consider the case when local delivery batching is involved. The test for
5001 "previously delivered" was not happening when checking to see if an
5002 address could be batched with a previous (undelivered) one; under
5003 certain circumstances this could lead to multiple deliveries to the same
5006 PH/05 Renamed the macro SOCKLEN_T as EXIM_SOCKLEN_T because AIX uses SOCKLEN_T
5007 in its include files, and this causes problems building Exim.
5009 PH/06 A number of "verify =" ACL conditions have no options (e.g. verify =
5010 header_syntax) but Exim was just ignoring anything given after a slash.
5011 In particular, this caused confusion with an attempt to use "verify =
5012 reverse_host_lookup/defer_ok". An error is now given when options are
5013 supplied for verify items that do not have them. (Maybe reverse_host_
5014 lookup should have a defer_ok option, but that's a different point.)
5016 PH/07 Increase the size of the buffer for incoming SMTP commands from 512 (as
5017 defined by RFC 821) to 2048, because there were problems with some AUTH
5018 commands, and RFC 1869 says the size should be increased for extended
5019 SMTP commands that take arguments.
5021 PH/08 Added ${dlfunc dynamically loaded function for expansion (code from Tony
5024 PH/09 Previously, an attempt to use ${perl when it wasn't compiled gave an
5025 "unknown" error; now it says that the functionality isn't in the binary.
5027 PH/10 Added a nasty fudge to try to recognize and flatten LDAP passwords in
5028 an address' error message when a string expansion fails (syntax or
5029 whatever). Otherwise the password may appear in the log. Following change
5030 PH/42 below, there is no longer a chance of it appearing in a bounce
5033 PH/11 Installed exipick version 20050225.0 from John Jetmore.
5035 PH/12 If the last host in a fallback_hosts list was multihomed, only the first
5036 of its addresses was ever tried. (Bugzilla bug #2.)
5038 PH/13 If "headers_add" in a transport didn't end in a newline, Exim printed
5039 the result incorrectly in the debug output. (It correctly added a newline
5040 to what was transported.)
5042 TF/01 Added $received_time.
5044 PH/14 Modified the default configuration to add an acl_smtp_data ACL, with
5045 commented out examples of how to interface to a virus scanner and to
5046 SpamAssassin. Also added commented examples of av_scanner and
5047 spamd_address settings.
5049 PH/15 Further to TK/02 and TK/03 above, tidied up the tables of what conditions
5050 and controls are allowed in which ACLs. There were a couple of minor
5051 errors. Some of the entries in the conditions table (which is a table of
5052 where they are NOT allowed) were getting very unwieldy; rewrote them as a
5053 negation of where the condition IS allowed.
5055 PH/16 Installed updated OS/os.c-cygwin from the Cygwin maintainer.
5057 PH/17 The API for radiusclient changed at release 0.4.0. Unfortunately, the
5058 header file does not have a version number, so I've had to invent a new
5059 value for RADIUS_LIB_TYPE, namely "RADIUSCLIENTNEW" to request the new
5060 API. The code is untested by me (my Linux distribution still has 0.3.2 of
5061 radiusclient), but it was contributed by a Radius user.
5063 PH/18 Installed Lars Mainka's patch for the support of CRL collections in
5064 files or directories, for OpenSSL.
5066 PH/19 When an Exim process that is running as root has to create an Exim log
5067 file, it does so in a subprocess that runs as exim:exim so as to get the
5068 ownership right at creation (otherwise, other Exim processes might see
5069 the file with the wrong ownership). There was no test for failure of this
5070 fork() call, which would lead to the process getting stuck as it waited
5071 for a non-existent subprocess. Forks do occasionally fail when resources
5072 run out. I reviewed all the other calls to fork(); they all seem to check
5075 PH/20 When checking for unexpected SMTP input at connect time (before writing
5076 the banner), Exim was not dealing correctly with a non-positive return
5077 from the read() function. If the client had disconnected by this time,
5078 the result was a log entry for a synchronization error with an empty
5079 string after "input=" when read() returned zero. If read() returned -1
5080 (an event I could not check), uninitialized data bytes were printed.
5081 There were reports of junk text (parts of files, etc) appearing after
5084 PH/21 Added acl_not_smtp_mime to allow for MIME scanning for non-SMTP messages.
5086 PH/22 Added support for macro redefinition, and (re)definition in between
5087 driver and ACL definitions.
5089 PH/23 The cyrus_sasl authenticator was expanding server_hostname, but then
5090 forgetting to use the resulting value; it was using the unexpanded value.
5092 PH/24 The cyrus_sasl authenticator was advertising mechanisms for which it
5093 hadn't been configured. The fix is from Juergen Kreileder, who
5094 understands it better than I do:
5096 "Here's what I see happening with three configured cyrus_sasl
5097 authenticators configured (plain, login, cram-md5):
5099 On startup auth_cyrus_sasl_init() gets called for each of these.
5100 This means three calls to sasl_listmech() without a specified mech_list.
5101 => SASL tests which mechs of all available mechs actually work
5102 => three warnings about OTP not working
5103 => the returned list contains: plain, login, cram-md5, digest-md5, ...
5105 With the patch, sasl_listmech() also gets called three times. But now
5106 SASL's mech_list option is set to the server_mech specified in the the
5107 authenticator. Or in other words, the answer from sasl_listmech()
5108 gets limited to just the mech you're testing for (which is different
5110 => the return list contains just 'plain' or 'login', 'cram-md5' or
5111 nothing depending on the value of ob->server_mech.
5113 I've just tested the patch: Authentication still works fine,
5114 unavailable mechs specified in the exim configuration are still
5115 caught, and the auth.log warnings about OTP are gone."
5117 PH/25 When debugging is enabled, the contents of the command line are added
5118 to the debugging output, even when log_selector=+arguments is not
5121 PH/26 Change scripts/os-type so that when "uname -s" returns just "GNU", the
5122 answer is "GNU", and only if the return is "GNU/something" is the answer
5125 PH/27 $acl_verify_message is now set immediately after the failure of a
5126 verification in an ACL, and so is available in subsequent modifiers. In
5127 particular, the message can be preserved by coding like this:
5129 warn !verify = sender
5130 set acl_m0 = $acl_verify_message
5132 Previously, $acl_verify_message was set only while expanding "message"
5133 and "log_message" when a very denied access.
5135 PH/28 Modified OS/os.c-Linux with
5137 -#ifndef OS_LOAD_AVERAGE
5138 +#if !defined(OS_LOAD_AVERAGE) && defined(__linux__)
5140 to make Exim compile on kfreebsd-gnu. (I'm totally confused about the
5141 nomenclature these days.)
5143 PH/29 Installed patch from the Sieve maintainer that adds the options
5144 sieve_useraddress and sieve_subaddress to the redirect router.
5146 PH/30 In these circumstances:
5147 . Two addresses routed to the same list of hosts;
5148 . First host does not offer TLS;
5149 . First host accepts first address;
5150 . First host gives temporary error to second address;
5151 . Second host offers TLS and a TLS session is established;
5152 . Second host accepts second address.
5153 Exim incorrectly logged both deliveries with the TLS parameters (cipher
5154 and peerdn, if requested) that were in fact used only for the second
5157 PH/31 When doing a callout as part of verifying an address, Exim was not paying
5158 attention to any local part prefix or suffix that was matched by the
5159 router that accepted the address. It now behaves in the same way as it
5160 does for delivery: the affixes are removed from the local part unless
5161 rcpt_include_affixes is set on the transport.
5163 PH/32 Add the sender address, as F=<...>, to the log line when logging a
5164 timeout during the DATA phase of an incoming message.
5166 PH/33 Sieve envelope tests were broken for match types other than :is. I have
5167 applied a patch sanctioned by the Sieve maintainer.
5169 PH/34 Change 4.50/80 broke Exim in that it could no longer handle cases where
5170 the uid or gid is negative. A case of a negative gid caused this to be
5171 noticed. The fix allows for either to be negative.
5173 PH/35 ACL_WHERE_MIME is now declared unconditionally, to avoid too much code
5174 clutter, but the tables that are indexed by ACL_WHERE_xxx values had been
5177 PH/36 The change PH/12 above was broken. Fixed it.
5179 PH/37 Exim used to check for duplicate addresses in the middle of routing, on
5180 the grounds that routing the same address twice would always produce the
5181 same answer. This might have been true once, but it is certainly no
5182 longer true now. Routing a child address may depend on the previous
5183 routing that produced that child. Some complicated redirection strategies
5184 went wrong when messages had multiple recipients, and made Exim's
5185 behaviour dependent on the order in which the addresses were given.
5187 I have moved the duplicate checking until after the routing is complete.
5188 Exim scans the addresses that are assigned to local and remote
5189 transports, and removes any duplicates. This means that more work will be
5190 done, as duplicates will always all be routed, but duplicates are
5191 presumably rare, so I don't expect this is of any significance.
5193 For deliveries to pipes, files, and autoreplies, the duplicate checking
5194 still happens during the routing process, since they are not going to be
5197 PH/38 Installed a patch from Ian Freislich, with the agreement of Tom Kistner.
5198 It corrects a timeout issue with spamd. This is Ian's comment: "The
5199 background is that sometimes spamd either never reads data from a
5200 connection it has accepted, or it never writes response data. The exiscan
5201 spam.[ch] uses a 3600 second timeout on spamd socket reads, further, it
5202 blindly assumes that writes won't block so it may never time out."
5204 PH/39 Allow G after quota size as well as K and M.
5206 PH/40 The value set for $authenticated_id in an authenticator may not contain
5207 binary zeroes or newlines because the value is written to log lines and
5208 to spool files. There was no check on this. Now the value is run through
5209 the string_printing() function so that such characters are converted to
5210 printable escape sequences.
5212 PH/41 $message_linecount is a new variable that contains the total number of
5213 lines in the message. Compare $body_linecount, which is the count for the
5216 PH/42 Exim no longer gives details of delivery errors for specific addresses in
5217 bounce and delay warning messages, except in certain special cases, which
5220 (a) An SMTP error message from a remote host;
5221 (b) A message specified in a :fail: redirection;
5222 (c) A message specified in a "fail" command in a system filter;
5223 (d) A message specified in a FAIL return from the queryprogram router;
5224 (e) A message specified by the cannot_route_message router option.
5226 In these cases only, Exim does include the error details in bounce and
5227 warning messages. There are also a few cases where bland messages such
5228 as "unrouteable address" or "local delivery error" are given.
5230 PH/43 $value is now also set for the "else" part of a ${run expansion.
5232 PH/44 Applied patch from the Sieve maintainer: "The vacation draft is still
5233 being worked on, but at least Exim now implements the latest version to
5236 PH/45 In a pipe transport, although a timeout while waiting for the pipe
5237 process to complete was treated as a delivery failure, a timeout while
5238 writing the message to the pipe was logged, but erroneously treated as a
5239 successful delivery. Such timeouts include transport filter timeouts. For
5240 consistency with the overall process timeout, these timeouts are now
5241 treated as errors, giving rise to delivery failures by default. However,
5242 there is now a new Boolean option for the pipe transport called
5243 timeout_defer, which, if set TRUE, converts the failures into defers for
5244 both kinds of timeout. A transport filter timeout is now identified in
5247 PH/46 The "scripts/Configure-config.h" script calls "make" at one point. On
5248 systems where "make" and "gmake" are different, calling "gmake" at top
5249 level broke things. I've arranged for the value of $(MAKE) to be passed
5250 from the Makefile to this script so that it can call the same version of
5254 A note about Exim versions 4.44 and 4.50
5255 ----------------------------------------
5257 Exim 4.50 was meant to be the next release after 4.43. It contains a lot of
5258 changes of various kinds. As a consequence, a big documentation update was
5259 needed. This delayed the release for rather longer than seemed good, especially
5260 in the light of a couple of (minor) security issues. Therefore, the changes
5261 that fixed bugs were backported into 4.43, to create a 4.44 maintenance
5262 release. So 4.44 and 4.50 are in effect two different branches that both start
5265 I have left the 4.50 change log unchanged; it contains all the changes since
5266 4.43. The change log for 4.44 is below; many of its items are identical to
5267 those for 4.50. This seems to be the most sensible way to preserve the
5268 historical information.
5274 1. Minor wording change to the doc/README.SIEVE file.
5276 2. Change 4.43/35 introduced a bug: if quota_filecount was set, the
5277 computation of the current number of files was incorrect.
5279 3. Closing a stable door: arrange to panic-die if setitimer() ever fails. The
5280 bug fixed in 4.43/37 would have been diagnosed quickly if this had been in
5283 4. Give more explanation in the error message when the command for a transport
5284 filter fails to execute.
5286 5. There are several places where Exim runs a non-Exim command in a
5287 subprocess. The SIGUSR1 signal should be disabled for these processes. This
5288 was being done only for the command run by the queryprogram router. It is
5289 now done for all such subprocesses. The other cases are: ${run, transport
5290 filters, and the commands run by the lmtp and pipe transports.
5292 6. Added CONFIGURE_GROUP build-time option.
5294 7. Some older OS have a limit of 256 on the maximum number of file
5295 descriptors. Exim was using setrlimit() to set 1000 as a large value
5296 unlikely to be exceeded. Change 4.43/17 caused a lot of logging on these
5297 systems. I've change it so that if it can't get 1000, it tries for 256.
5299 8. "control=submission" was allowed, but had no effect, in a DATA ACL. This
5300 was an oversight, and furthermore, ever since the addition of extra
5301 controls (e.g. 4.43/32), the checks on when to allow different forms of
5302 "control" were broken. There should now be diagnostics for all cases when a
5303 control that does not make sense is encountered.
5305 9. Added the /retain_sender option to "control=submission".
5307 10. $recipients is now available in the predata ACL (oversight).
5309 11. Tidy the search cache before the fork to do a delivery from a message
5310 received from the command line. Otherwise the child will trigger a lookup
5311 failure and thereby defer the delivery if it tries to use (for example) a
5312 cached ldap connection that the parent has called unbind on.
5314 12. If verify=recipient was followed by verify=sender in a RCPT ACL, the value
5315 of $address_data from the recipient verification was clobbered by the
5316 sender verification.
5318 13. The value of address_data from a sender verification is now available in
5319 $sender_address_data in subsequent conditions in the ACL statement.
5321 14. Added forbid_sieve_filter and forbid_exim_filter to the redirect router.
5323 15. Added a new option "connect=<time>" to callout options, to set a different
5326 16. If FIXED_NEVER_USERS was defined, but empty, Exim was assuming the uid 0
5327 was its contents. (It was OK if the option was not defined at all.)
5329 17. A "Completed" log line is now written for messages that are removed from
5330 the spool by the -Mrm option.
5332 18. New variables $sender_verify_failure and $recipient_verify_failure contain
5333 information about exactly what failed.
5335 19. Added -dd to debug only the daemon process.
5337 20. Incorporated Michael Haardt's patch to ldap.c for improving the way it
5338 handles timeouts, both on the server side and network timeouts. Renamed the
5339 CONNECT parameter as NETTIMEOUT (but kept the old name for compatibility).
5341 21. The rare case of EHLO->STARTTLS->HELO was setting the protocol to "smtp".
5342 It is now set to "smtps".
5344 22. $host_address is now set to the target address during the checking of
5345 ignore_target_hosts.
5347 23. When checking ignore_target_hosts for an ipliteral router, no host name was
5348 being passed; this would have caused $sender_host_name to have been used if
5349 matching the list had actually called for a host name (not very likely,
5350 since this list is usually IP addresses). A host name is now passed as
5353 24. Changed the calls that set up the SIGCHLD handler in the daemon to use the
5354 code that specifies a non-restarting handler (typically sigaction() in
5355 modern systems) in an attempt to fix a rare and obscure crash bug.
5357 25. Narrowed the window for a race in the daemon that could cause it to ignore
5358 SIGCHLD signals. This is not a major problem, because they are used only to
5359 wake it up if nothing else does.
5361 26. A malformed maildirsize file could cause Exim to calculate negative values
5362 for the mailbox size or file count. Odd effects could occur as a result.
5363 The maildirsize information is now recalculated if the size or filecount
5366 27. Added HAVE_SYS_STATVFS_H to the os.h file for Linux, as it has had this
5367 support for a long time. Removed HAVE_SYS_VFS_H.
5369 28. Installed the latest version of exipick from John Jetmore.
5371 29. In an address list, if the pattern was not a regular expression, an empty
5372 subject address (from a bounce message) matched only if the pattern was an
5373 empty string. Non-empty patterns were not even tested. This was the wrong
5374 because it is perfectly reasonable to use an empty address as part of a
5375 database query. An empty address is now tested by patterns that are
5376 lookups. However, all the other forms of pattern expect the subject to
5377 contain a local part and a domain, and therefore, for them, an empty
5378 address still always fails if the pattern is not itself empty.
5380 30. Exim went into a mad DNS loop when attempting to do a callout where the
5381 host was specified on an smtp transport, and looking it up yielded more
5382 than one IP address.
5384 31. Re-factored the code for checking spool and log partition space into a
5385 function that finds that data and another that does the check. The former
5386 is then used to implement four new variables: $spool_space, $log_space,
5387 $spool_inodes, and $log_inodes.
5389 32. The RFC2047 encoding function was originally intended for short strings
5390 such as real names; it was not keeping to the 75-character limit for
5391 encoded words that the RFC imposes. It now respects the limit, and
5392 generates multiple encoded words if necessary. To be on the safe side, I
5393 have increased the buffer size for the ${rfc2047: expansion operator from
5396 33. It is now permitted to omit both strings after an "if" condition; if the
5397 condition is true, the result is "true". As before, when the second string
5398 is omitted, a false condition yields an empty string. This makes it less
5399 cumbersome to write custom ACL and router conditions.
5401 34. Failure to deliver a bounce message always caused it to be frozen, even if
5402 there was an errors_to setting on the router. The errors_to setting is now
5405 35. If an IPv6 address is given for -bh or -bhc, it is now converted to the
5406 canonical form (fully expanded) before being placed in
5407 $sender_host_address.
5409 36. The table in the code that translates DNS record types into text (T_A to
5410 "A" for instance) was missing entries for NS and CNAME. It is just possible
5411 that this could have caused confusion if both these types were looked up
5412 for the same domain, because the text type is used as part of Exim's
5413 per-process caching. But the chance of anyone hitting this buglet seems
5416 37. The dnsdb lookup has been extended in a number of ways.
5418 (1) There is a new type, "zns", which walks up the domain tree until it
5419 finds some nameserver records. It should be used with care.
5421 (2) There is a new type, "mxh", which is like "mx" except that it returns
5422 just the host names, not the priorities.
5424 (3) It is now possible to give a list of domains (or IP addresses) to be
5425 looked up. The behaviour when one of the lookups defers can be
5426 controlled by a keyword.
5428 (4) It is now possible to specify the separator character for use when
5429 multiple records are returned.
5431 38. The dnslists ACL condition has been extended: it is now possible to supply
5432 a list of IP addresses and/or domains to be looked up in a particular DNS
5435 39. Added log_selector=+queue_time_overall.
5437 40. When running the queue in the test harness, wait just a tad after forking a
5438 delivery process, to get repeatability of debugging output.
5440 41. Include certificate and key file names in error message when GnuTLS fails
5441 to set them up, because the GnuTLS error message doesn't include the name
5442 of the failing file when there is a problem reading it.
5444 42. Allow both -bf and -bF in the same test run.
5446 43. Did the same fix as 41 above for OpenSSL, which had the same infelicity.
5448 44. The "Exiscan patch" is now merged into the mainline Exim source.
5450 45. Sometimes the final signoff response after QUIT could fail to get
5451 transmitted in the non-TLS case. Testing !tls_active instead of tls_active
5452 < 0 before doing a fflush(). This bug looks as though it goes back to the
5453 introduction of TLS in release 3.20, but "sometimes" must have been rare
5454 because the tests only now provoked it.
5456 46. Reset the locale to "C" after calling embedded Perl, in case it was changed
5457 (this can affect the format of dates).
5459 47. exim_tidydb, when checking for the continued existence of a message for
5460 which it has found a message-specific retry record, was not finding
5461 messages that were in split spool directories. Consequently, it was
5462 deleting retry records that should have stayed in existence.
5464 48. Steve fixed some bugs in eximstats.
5466 49. The SPA authentication driver was not abandoning authentication and moving
5467 on to the next authenticator when an expansion was forced to fail,
5468 contradicting the general specification for all authenticators. Instead it
5469 was generating a temporary error. It now behaves as specified.
5471 50. The default ordering of permitted cipher suites for GnuTLS was pessimal
5472 (the order specifies the preference for clients). The order is now AES256,
5473 AES128, 3DES, ARCFOUR128.
5475 51. Small patch to Sieve code - explicitly set From: when generating an
5478 52. Exim crashed if a remote delivery caused a very long error message to be
5479 recorded - for instance if somebody sent an entire SpamAssassin report back
5480 as a large number of 550 error lines. This bug was coincidentally fixed by
5481 increasing the size of one of Exim's internal buffers (big_buffer) that
5482 happened as part of the Exiscan merge. However, to be on the safe side, I
5483 have made the code more robust (and fixed the comments that describe what
5486 53. Now that there can be additional text after "Completed" in log lines (if
5487 the queue_time_overall log selector is set), a one-byte patch to exigrep
5488 was needed to allow it to recognize "Completed" as not the last thing in
5491 54. The LDAP lookup was not handling a return of LDAP_RES_SEARCH_REFERENCE. A
5492 patch that reportedly fixes this has been added. I am not expert enough to
5493 create a test for it. This is what the patch creator wrote:
5495 "I found a little strange behaviour of ldap code when working with
5496 Windows 2003 AD Domain, where users was placed in more than one
5497 Organization Units. When I tried to give exim partial DN, the exit code
5498 of ldap_search was unknown to exim because of LDAP_RES_SEARCH_REFERENCE.
5499 But simultaneously result of request was absolutely normal ldap result,
5500 so I produce this patch..."
5502 Later: it seems that not all versions of LDAP support LDAP_RES_SEARCH_
5503 REFERENCE, so I have modified the code to exclude the patch when that macro
5506 55. Some experimental protocols are using DNS PTR records for new purposes. The
5507 keys for these records are domain names, not reversed IP addresses. The
5508 dnsdb PTR lookup now tests whether its key is an IP address. If not, it
5509 leaves it alone. Component reversal etc. now happens only for IP addresses.
5512 56. Improve error message when ldap_search() fails in OpenLDAP or Solaris LDAP.
5514 57. Double the size of the debug message buffer (to 2048) so that more of very
5515 long debug lines gets shown.
5517 58. The exicyclog utility now does better if the number of log files to keep
5518 exceeds 99. In this case, it numbers them 001, 002 ... instead of 01, 02...
5520 59. Two changes related to the smtp_active_hostname option:
5522 (1) $smtp_active_hostname is now available as a variable.
5523 (2) The default for smtp_banner uses $smtp_active_hostname instead
5524 of $primary_hostname.
5526 60. The host_aton() function is supposed to be passed a string that is known
5527 to be a valid IP address. However, in the case of IPv6 addresses, it was
5528 not checking this. This is a hostage to fortune. Exim now panics and dies
5529 if the condition is not met. A case was found where this could be provoked
5530 from a dnsdb PTR lookup with an IPv6 address that had more than 8
5531 components; fortuitously, this particular loophole had already been fixed
5532 by change 4.50/55 above.
5534 If there are any other similar loopholes, the new check in host_aton()
5535 itself should stop them being exploited. The report I received stated that
5536 data on the command line could provoke the exploit when Exim was running as
5537 exim, but did not say which command line option was involved. All I could
5538 find was the use of -be with a bad dnsdb PTR lookup, and in that case it is
5539 running as the user.
5542 61. There was a buffer overflow vulnerability in the SPA authentication code
5543 (which came originally from the Samba project). I have added a test to the
5544 spa_base64_to_bits() function which I hope fixes it.
5547 62. Configuration update for GNU/Hurd and variations. Updated Makefile-GNU and
5548 os.h-GNU, and added configuration files for GNUkFreeBSD and GNUkNetBSD.
5550 63. The daemon start-up calls getloadavg() while still root for those OS that
5551 need the first call to be done as root, but it missed one case: when
5552 deliver_queue_load_max is set with deliver_drop_privilege. This is
5553 necessary for the benefit of the queue runner, because there is no re-exec
5554 when deliver_drop_privilege is set.
5556 64. A call to exiwhat cut short delays set up by "delay" modifiers in ACLs.
5557 This has been fixed.
5559 65. Caching of lookup data for "hosts =" ACL conditions, when a named host list
5560 was in use, was not putting the data itself into the right store pool;
5561 consequently, it could be overwritten for a subsequent message in the same
5562 SMTP connection. (Fix 4.40/11 dealt with the non-cache case, but overlooked
5565 66. Added hosts_max_try_hardlimit to the smtp transport, default 50.
5567 67. The string_is_ip_address() function returns 0, 4, or 6, for "no an IP
5568 address", "IPv4 address", and "IPv6 address", respectively. Some calls of
5569 the function were treating the return as a boolean value, which happened to
5570 work because 0=false and not-0=true, but is not correct code.
5572 68. The host_aton() function was not handling scoped IPv6 addresses (those
5573 with, for example, "%eth0" on the end) correctly.
5575 69. Fixed some compiler warnings in acl.c for the bitmaps specified with
5576 negated items (that is, ~something) in unsigned ints. Some compilers
5577 apparently mutter when there is no cast.
5579 70. If an address verification called from an ACL failed, and did not produce a
5580 user-specific message (i.e. there was only a "system" message), nothing was
5581 put in $acl_verify_message. In this situation, it now puts the system
5584 71. Change 4.23/11 added synchronization checking at the start of an SMTP
5585 session; change 4.31/43 added the unwanted input to the log line - except
5586 that it did not do this in the start of session case. It now does.
5588 72. After a timeout in a callout SMTP session, Exim still sent a QUIT command.
5589 This is wrong and can cause the other end to generate a synchronization
5590 error if it is another Exim or anything else that does the synchronization
5591 check. A QUIT command is no longer sent after a timeout.
5593 73. $host_lookup_deferred has been added, to make it easier to detect DEFERs
5594 during host lookups.
5596 74. The defer_ok option of callout verification was not working if it was used
5597 when verifying addresses in header lines, that is, for this case:
5599 verify = header_sender/callout=defer_ok
5601 75. A backgrounded daemon closed stdin/stdout/stderr on entry; this meant that
5602 those file descriptors could be used for SMTP connections. If anything
5603 wrote to stderr (the example that came up was "warn" in embedded Perl), it
5604 could be sent to the SMTP client, causing chaos. The daemon now opens
5605 stdin, stdout, and stderr to /dev/null when it puts itself into the
5608 76. Arrange for output from Perl's "warn" command to be written to Exim's main
5609 log by default. The user can override this with suitable Perl magic.
5611 77. The use of log_message on a "discard" ACL verb, which is supposed to add to
5612 the log message when discard triggers, was not working for the DATA ACL or
5613 for the non-SMTP ACL.
5615 78. Error message wording change in sieve.c.
5617 79. If smtp_accept_max_per_host was set, the number of connections could be
5618 restricted to fewer than expected, because the daemon was trying to set up
5619 a new connection before checking whether the processes handling previous
5620 connections had finished. The check for completed processes is now done
5621 earlier. On busy systems, this bug wouldn't be noticed because something
5622 else would have woken the daemon, and it would have reaped the completed
5625 80. If a message was submitted locally by a user whose login name contained one
5626 or more spaces (ugh!), the spool file that Exim wrote was not re-readable.
5627 It caused a spool format error. I have fixed the spool reading code. A
5628 related problem was that the "from" clause in the Received: line became
5629 illegal because of the space(s). It is now covered by ${quote_local_part.
5631 81. Included the latest eximstats from Steve (adds average sizes to HTML Top
5634 82. Updated OS/Makefile-AIX as per message from Mike Meredith.
5636 83. Patch from Sieve maintainer to fix unterminated string problem in
5637 "vacation" handling.
5639 84. Some minor changes to the Linux configuration files to help with other
5640 OS variants using glibc.
5642 85. One more patch for Sieve to update vacation handling to latest spec.
5645 ----------------------------------------------------
5646 See the note above about the 4.44 and 4.50 releases.
5647 ----------------------------------------------------
5653 1. Change 4.43/35 introduced a bug that caused file counts to be
5654 incorrectly computed when quota_filecount was set in an appendfile
5657 2. Closing a stable door: arrange to panic-die if setitimer() ever fails. The
5658 bug fixed in 4.43/37 would have been diagnosed quickly if this had been in
5661 3. Give more explanation in the error message when the command for a transport
5662 filter fails to execute.
5664 4. There are several places where Exim runs a non-Exim command in a
5665 subprocess. The SIGUSR1 signal should be disabled for these processes. This
5666 was being done only for the command run by the queryprogram router. It is
5667 now done for all such subprocesses. The other cases are: ${run, transport
5668 filters, and the commands run by the lmtp and pipe transports.
5670 5. Some older OS have a limit of 256 on the maximum number of file
5671 descriptors. Exim was using setrlimit() to set 1000 as a large value
5672 unlikely to be exceeded. Change 4.43/17 caused a lot of logging on these
5673 systems. I've change it so that if it can't get 1000, it tries for 256.
5675 6. "control=submission" was allowed, but had no effect, in a DATA ACL. This
5676 was an oversight, and furthermore, ever since the addition of extra
5677 controls (e.g. 4.43/32), the checks on when to allow different forms of
5678 "control" were broken. There should now be diagnostics for all cases when a
5679 control that does not make sense is encountered.
5681 7. $recipients is now available in the predata ACL (oversight).
5683 8. Tidy the search cache before the fork to do a delivery from a message
5684 received from the command line. Otherwise the child will trigger a lookup
5685 failure and thereby defer the delivery if it tries to use (for example) a
5686 cached ldap connection that the parent has called unbind on.
5688 9. If verify=recipient was followed by verify=sender in a RCPT ACL, the value
5689 of $address_data from the recipient verification was clobbered by the
5690 sender verification.
5692 10. If FIXED_NEVER_USERS was defined, but empty, Exim was assuming the uid 0
5693 was its contents. (It was OK if the option was not defined at all.)
5695 11. A "Completed" log line is now written for messages that are removed from
5696 the spool by the -Mrm option.
5698 12. $host_address is now set to the target address during the checking of
5699 ignore_target_hosts.
5701 13. When checking ignore_target_hosts for an ipliteral router, no host name was
5702 being passed; this would have caused $sender_host_name to have been used if
5703 matching the list had actually called for a host name (not very likely,
5704 since this list is usually IP addresses). A host name is now passed as
5707 14. Changed the calls that set up the SIGCHLD handler in the daemon to use the
5708 code that specifies a non-restarting handler (typically sigaction() in
5709 modern systems) in an attempt to fix a rare and obscure crash bug.
5711 15. Narrowed the window for a race in the daemon that could cause it to ignore
5712 SIGCHLD signals. This is not a major problem, because they are used only to
5713 wake it up if nothing else does.
5715 16. A malformed maildirsize file could cause Exim to calculate negative values
5716 for the mailbox size or file count. Odd effects could occur as a result.
5717 The maildirsize information is now recalculated if the size or filecount
5720 17. Added HAVE_SYS_STATVFS_H to the os.h file for Linux, as it has had this
5721 support for a long time. Removed HAVE_SYS_VFS_H.
5723 18. Updated exipick to current release from John Jetmore.
5725 19. Allow an empty sender to be matched against a lookup in an address list.
5726 Previously the only cases considered were a regular expression, or an
5729 20. Exim went into a mad DNS lookup loop when doing a callout where the
5730 host was specified on the transport, if the DNS lookup yielded more than
5733 21. The RFC2047 encoding function was originally intended for short strings
5734 such as real names; it was not keeping to the 75-character limit for
5735 encoded words that the RFC imposes. It now respects the limit, and
5736 generates multiple encoded words if necessary. To be on the safe side, I
5737 have increased the buffer size for the ${rfc2047: expansion operator from
5740 22. Failure to deliver a bounce message always caused it to be frozen, even if
5741 there was an errors_to setting on the router. The errors_to setting is now
5744 23. If an IPv6 address is given for -bh or -bhc, it is now converted to the
5745 canonical form (fully expanded) before being placed in
5746 $sender_host_address.
5748 24. Updated eximstats to version 1.33
5750 25. Include certificate and key file names in error message when GnuTLS fails
5751 to set them up, because the GnuTLS error message doesn't include the name
5752 of the failing file when there is a problem reading it.
5754 26. Expand error message when OpenSSL has problems setting up cert/key files.
5757 27. Reset the locale to "C" after calling embedded Perl, in case it was changed
5758 (this can affect the format of dates).
5760 28. exim_tidydb, when checking for the continued existence of a message for
5761 which it has found a message-specific retry record, was not finding
5762 messages that were in split spool directories. Consequently, it was
5763 deleting retry records that should have stayed in existence.
5765 29. eximstats updated to version 1.35
5766 1.34 - allow eximstats to parse syslog lines as well as mainlog lines
5767 1.35 - bugfix such that pie charts by volume are generated correctly
5769 30. The SPA authentication driver was not abandoning authentication and moving
5770 on to the next authenticator when an expansion was forced to fail,
5771 contradicting the general specification for all authenticators. Instead it
5772 was generating a temporary error. It now behaves as specified.
5774 31. The default ordering of permitted cipher suites for GnuTLS was pessimal
5775 (the order specifies the preference for clients). The order is now AES256,
5776 AES128, 3DES, ARCFOUR128.
5778 31. Small patch to Sieve code - explicitly set From: when generating an
5781 32. Exim crashed if a remote delivery caused a very long error message to be
5782 recorded - for instance if somebody sent an entire SpamAssassin report back
5783 as a large number of 550 error lines. This bug was coincidentally fixed by
5784 increasing the size of one of Exim's internal buffers (big_buffer) that
5785 happened as part of the Exiscan merge. However, to be on the safe side, I
5786 have made the code more robust (and fixed the comments that describe what
5789 33. Some experimental protocols are using DNS PTR records for new purposes. The
5790 keys for these records are domain names, not reversed IP addresses. The
5791 dnsdb PTR lookup now tests whether its key is an IP address. If not, it
5792 leaves it alone. Component reversal etc. now happens only for IP addresses.
5795 34. The host_aton() function is supposed to be passed a string that is known
5796 to be a valid IP address. However, in the case of IPv6 addresses, it was
5797 not checking this. This is a hostage to fortune. Exim now panics and dies
5798 if the condition is not met. A case was found where this could be provoked
5799 from a dnsdb PTR lookup with an IPv6 address that had more than 8
5800 components; fortuitously, this particular loophole had already been fixed
5801 by change 4.50/55 or 4.44/33 above.
5803 If there are any other similar loopholes, the new check in host_aton()
5804 itself should stop them being exploited. The report I received stated that
5805 data on the command line could provoke the exploit when Exim was running as
5806 exim, but did not say which command line option was involved. All I could
5807 find was the use of -be with a bad dnsdb PTR lookup, and in that case it is
5808 running as the user.
5811 35. There was a buffer overflow vulnerability in the SPA authentication code
5812 (which came originally from the Samba project). I have added a test to the
5813 spa_base64_to_bits() function which I hope fixes it.
5816 36. The daemon start-up calls getloadavg() while still root for those OS that
5817 need the first call to be done as root, but it missed one case: when
5818 deliver_queue_load_max is set with deliver_drop_privilege. This is
5819 necessary for the benefit of the queue runner, because there is no re-exec
5820 when deliver_drop_privilege is set.
5822 37. Caching of lookup data for "hosts =" ACL conditions, when a named host list
5823 was in use, was not putting the data itself into the right store pool;
5824 consequently, it could be overwritten for a subsequent message in the same
5825 SMTP connection. (Fix 4.40/11 dealt with the non-cache case, but overlooked
5828 38. Sometimes the final signoff response after QUIT could fail to get
5829 transmitted in the non-TLS case. Testing !tls_active instead of tls_active
5830 < 0 before doing a fflush(). This bug looks as though it goes back to the
5831 introduction of TLS in release 3.20, but "sometimes" must have been rare
5832 because the tests only now provoked it.
5838 1. Fixed a longstanding but relatively impotent bug: a long time ago, before
5839 PIPELINING, the function smtp_write_command() used to return TRUE or FALSE.
5840 Now it returns an integer. A number of calls were still expecting a T/F
5841 return. Fortuitously, in all cases, the tests worked in OK situations,
5842 which is the norm. However, things would have gone wrong on any write
5843 failures on the smtp file descriptor. This function is used when sending
5844 messages over SMTP and also when doing verify callouts.
5846 2. When Exim is called to do synchronous delivery of a locally submitted
5847 message (the -odf or -odi options), it no longer closes stderr before doing
5850 3. Implemented the mua_wrapper option.
5852 4. Implemented mx_fail_domains and srv_fail_domains for the dnslookup router.
5854 5. Implemented the functions header_remove(), header_testname(),
5855 header_add_at_position(), and receive_remove_recipient(), and exported them
5858 6. If an ACL "warn" statement specified the addition of headers, Exim already
5859 inserted X-ACL-Warn: at the start if there was no header name. However, it
5860 was not making this test for the second and subsequent header lines if
5861 there were newlines in the string. This meant that an invalid header could
5862 be inserted if Exim was badly configured.
5864 7. Allow an ACL "warn" statement to add header lines at the start or after all
5865 the Received: headers, as well as at the end.
5867 8. Added the rcpt_4xx retry error code.
5869 9. Added postmaster_mailfrom=xxx to callout verification option.
5871 10. Added mailfrom=xxxx to the callout verification option, for verify=
5874 11. ${substr_1_:xxxx} and ${substr__3:xxxx} are now diagnosed as syntax errors
5875 (they previously behaved as ${substr_1_0:xxxx} and ${substr:_0_3:xxxx}).
5877 12. Inserted some casts to stop certain compilers warning when using pointer
5878 differences as field lengths or precisions in printf-type calls (mostly
5879 affecting debugging statements).
5881 13. Added optional readline() support for -be (dynamically loaded).
5883 14. Obscure bug fix: if a message error (e.g. 4xx to MAIL) happened within the
5884 same clock tick as a message's arrival, so that its received time was the
5885 same as the "first fail" time on the retry record, and that message
5886 remained on the queue past the ultimate address timeout, every queue runner
5887 would try a delivery (because it was past the ultimate address timeout) but
5888 after another failure, the ultimate address timeout, which should have then
5889 bounced the address, did not kick in. This was a "< instead of <=" error;
5890 in most cases the first failure would have been in the next clock tick
5891 after the received time, and all would be well.
5893 15. The special items beginning with @ in domain lists (e.g. @mx_any) were not
5894 being recognized when the domain list was tested by the match_domain
5895 condition in an expansion string.
5897 16. Added the ${str2b64: operator.
5899 17. Exim was always calling setrlimit() to set a large limit for the number of
5900 processes, without checking whether the existing limit was already
5901 adequate. (It did check for the limit on file descriptors.) Furthermore,
5902 errors from getrlimit() and setrlimit() were being ignored. Now they are
5903 logged to the main and panic logs, but Exim does carry on, to try to do its
5904 job under whatever limits there are.
5906 18. Imported PCRE 5.0.
5908 19. Trivial typo in log message " temporarily refused connection" (the leading
5911 20. If the log selector return_path_on_delivery was set and an address was
5912 redirected to /dev/null, the delivery process crashed because it assumed
5913 that a return path would always be set for a "successful" delivery. In this
5914 case, the whole delivery is bypassed as an optimization, and therefore no
5917 21. Internal re-arrangement: the function for sending a challenge and reading
5918 a response while authentication was assuming a zero-terminated challenge
5919 string. It's now changed to take a pointer and a length, to allow for
5920 binary data in such strings.
5922 22. Added the cyrus_sasl authenticator (code supplied by MBM).
5924 23. Exim was not respecting finduser_retries when seeking the login of the
5925 uid under which it was called; it was always trying 10 times. (The default
5926 setting of finduser_retries is zero.) Also, it was sleeping after the final
5927 failure, which is pointless.
5929 24. Implemented tls_on_connect_ports.
5931 25. Implemented acl_smtp_predata.
5933 26. If the domain in control=submission is set empty, Exim assumes that the
5934 authenticated id is a complete email address when it generates From: or
5935 Sender: header lines.
5937 27. Added "#define SOCKLEN_T int" to OS/os.h-SCO and OS/os.h-SCO_SV. Also added
5938 definitions to OS/Makefile-SCO and OS/Makefile-SCO_SV that put basename,
5939 chown and chgrp in /bin and hostname in /usr/bin.
5941 28. Exim was keeping the "process log" file open after each use, just as it
5942 does for the main log. This opens the possibility of it remaining open for
5943 long periods when the USR1 signal hits a daemon. Occasional processlog
5944 errors were reported, that could have been caused by this. Anyway, it seems
5945 much more sensible not to leave this file open at all, so that is what now
5948 29. The long-running daemon process does not normally write to the log once it
5949 has entered its main loop, and it closes the log before doing so. This is
5950 so that log files can straightforwardly be renamed and moved. However,
5951 there are a couple of unusual error situations where the daemon does write
5952 log entries, and I had neglected to close the log afterwards.
5954 30. The text of an SMTP error response that was received during a remote
5955 delivery was being truncated at 512 bytes. This is too short for some of
5956 the long messages that one sometimes sees. I've increased the limit to
5959 31. It is now possible to make retry rules that apply only when a message has a
5960 specific sender, in particular, an empty sender.
5962 32. Added "control = enforce_sync" and "control = no_enforce_sync". This makes
5963 it possible to be selective about when SMTP synchronization is enforced.
5965 33. Added "control = caseful_local_part" and "control = "caselower_local_part".
5967 32. Implemented hosts_connection_nolog.
5969 33. Added an ACL for QUIT.
5971 34. Setting "delay_warning=" to disable warnings was not working; it gave a
5974 35. Added mailbox_size and mailbox_filecount to appendfile.
5976 36. Added control = no_multiline_responses to ACLs.
5978 37. There was a bug in the logic of the code that waits for the clock to tick
5979 in the case where the clock went backwards by a substantial amount such
5980 that the microsecond fraction of "now" was more than the microsecond
5981 fraction of "then" (but the whole seconds number was less).
5983 38. Added support for the libradius Radius client library this is found on
5984 FreeBSD (previously only the radiusclient library was supported).
5990 1. When certain lookups returned multiple values in the form name=value, the
5991 quoting of the values was not always being done properly. Specifically:
5992 (a) If the value started with a double quote, but contained no whitespace,
5994 (b) If the value contained whitespace other than a space character (i.e.
5995 tabs or newlines or carriage returns) it was not quoted.
5996 This fix has been applied to the mysql and pgsql lookups by writing a
5997 separate quoting function and calling it from the lookup code. The fix
5998 should probably also be applied to nisplus, ibase and oracle lookups, but
5999 since I cannot test any of those, I have not disturbed their existing code.
6001 2. A hit in the callout cache for a specific address caused a log line with no
6002 reason for rejecting RCPT. Now it says "Previous (cached) callout
6003 verification failure".
6005 3. There was an off-by-one bug in the queryprogram router. An over-long
6006 return line was truncated at 256 instead of 255 characters, thereby
6007 overflowing its buffer with the terminating zero. As well as fixing this, I
6008 have increased the buffer size to 1024 (and made a note to document this).
6010 4. If an interrupt, such as the USR1 signal that is send by exiwhat, arrives
6011 when Exim is waiting for an SMTP response from a remote server, Exim
6012 restarts its select() call on the socket, thereby resetting its timeout.
6013 This is not a problem when such interrupts are rare. Somebody set up a cron
6014 job to run exiwhat every 2 minutes, which is less than the normal select()
6015 timeout (5 or 10 minutes). This meant that the select() timeout never
6016 kicked in because it was always reset. I have fixed this by comparing the
6017 time when an interrupt arrives with the time at the start of the first call
6018 to select(). If more time than the timeout has elapsed, the interrupt is
6019 treated as a timeout.
6021 5. Some internal re-factoring in preparation for the addition of Sieve
6022 extensions (by MH). In particular, the "personal" test is moved to a
6023 separate function, and given an option for scanning Cc: and Bcc: (which is
6024 not set for Exim filters).
6026 6. When Exim created an email address using the login of the caller as the
6027 local part (e.g. when creating a From: or Sender: header line), it was not
6028 quoting the local part when it contained special characters such as @.
6030 7. Installed new OpenBSD configuration files.
6032 8. Reworded some messages for syntax errors in "and" and "or" conditions to
6033 try to make them clearer.
6035 9. Callout options, other than the timeout value, were being ignored when
6036 verifying sender addresses in header lines. For example, when using
6038 verify = header_sender/callout=no_cache
6040 the cache was (incorrectly) being used.
6042 10. Added a missing instance of ${EXE} to the exim_install script; this affects
6043 only the Cygwin environment.
6045 11. When return_path_on_delivery was set as a log selector, if different remote
6046 addresses in the same message used different return paths and parallel
6047 remote delivery occurred, the wrong values would sometimes be logged.
6048 (Whenever a remote delivery process finished, the return path value from
6049 the most recently started remote delivery process was logged.)
6051 12. RFC 3848 specifies standard names for the "with" phrase in Received: header
6052 lines when AUTH and/or TLS are in use. This is the "received protocol"
6053 field. Exim used to use "asmtp" for authenticated SMTP, without any
6054 indication (in the protocol name) for TLS use. Now it follows the RFC and
6055 uses "esmtpa" if the connection is authenticated, "esmtps" if it is
6056 encrypted, and "esmtpsa" if it is both encrypted and authenticated. These
6057 names appear in log lines as well as in Received: header lines.
6059 13. Installed MH's patches for Sieve to add the "copy" and "vacation"
6060 extensions, and comparison tests, and to fix some bugs.
6062 14. Changes to the "personal" filter test:
6064 (1) The test was buggy in that it was just doing the equivalent of
6065 "contains" tests on header lines. For example, if a user's address was
6066 anne@some.where, the "personal" test would incorrectly be true for
6068 To: susanne@some.where
6070 This test is now done by extracting each address from the header in turn,
6071 and checking the entire address. Other tests that are part of "personal"
6072 are now done using regular expressions (for example, to check local parts
6073 of addresses in From: header lines).
6075 (2) The list of non-personal local parts in From: addresses has been
6076 extended to include "listserv", "majordomo", "*-request", and "owner-*",
6077 taken from the Sieve specification recommendations.
6079 (3) If the message contains any header line starting with "List-" it is
6080 treated as non-personal.
6082 (4) The test for "circular" in the Subject: header line has been removed
6083 because it now seems ill-conceived.
6085 15. Minor typos in src/EDITME comments corrected.
6087 16. Installed latest exipick from John Jetmore.
6089 17. If headers_add on a router specified a text string that was too long for
6090 string_sprintf() - that is, longer than 8192 bytes - Exim panicked. The use
6091 of string_sprintf() is now avoided.
6093 18. $message_body_size was not set (it was always zero) when running the DATA
6094 ACL and the local_scan() function.
6096 19. For the "mail" command in an Exim filter, no default was being set for
6097 the once_repeat time, causing a random time value to be used if "once" was
6098 specified. (If the value happened to be <= 0, no repeat happened.) The
6099 default is now 0s, meaning "never repeat". The "vacation" command was OK
6100 (its default is 7d). It's somewhat surprising nobody ever noticed this bug
6101 (I found it when inspecting the code).
6103 20. There is now an overall timeout for performing a callout verification. It
6104 defaults to 4 times the callout timeout, which applies to individual SMTP
6105 commands during the callout. The overall timeout applies when there is more
6106 than one host that can be tried. The timeout is checked before trying the
6107 next host. This prevents very long delays if there are a large number of
6108 hosts and all are timing out (e.g. when the network connections are timing
6109 out). The value of the overall timeout can be changed by specifying an
6110 additional sub-option for "callout", called "maxwait". For example:
6112 verify = sender/callout=5s,maxwait=20s
6114 21. Add O_APPEND to the open() call for maildirsize files (Exim already seeks
6115 to the end before writing, but this should make it even safer).
6117 22. Exim was forgetting that it had advertised PIPELINING for the second and
6118 subsequent messages on an SMTP connection. It was also not resetting its
6119 memory on STARTTLS and an internal HELO.
6121 23. When Exim logs an SMTP synchronization error within a session, it now
6122 records whether PIPELINING has been advertised or not.
6124 24. Added 3 instances of "(long int)" casts to time_t variables that were being
6125 formatted using %ld, because on OpenBSD (and perhaps others), time_t is int
6126 rather than long int.
6128 25. Installed the latest Cygwin configuration files from the Cygwin maintainer.
6130 26. Added the never_mail option to autoreply.
6136 1. A reorganization of the code in order to implement 4.40/8 caused a daemon
6137 crash if the getsockname() call failed; this can happen if a connection is
6138 closed very soon after it is established. The problem was simply in the
6139 order in which certain operations were done, causing Exim to try to write
6140 to the SMTP stream before it had set up the file descriptor. The bug has
6141 been fixed by making things happen in the correct order.
6147 1. If "drop" was used in a DATA ACL, the SMTP output buffer was not flushed
6148 before the connection was closed, thus losing the rejection response.
6150 2. Commented out the definition of SOCKLEN_T in os.h-SunOS5. It is needed for
6151 some early Solaris releases, but causes trouble in current releases where
6152 socklen_t is defined.
6154 3. When std{in,out,err} are closed, re-open them to /dev/null so that they
6157 4. Minor refactoring of os.c-Linux to avoid compiler warning when IPv6 is not
6160 5. Refactoring in expand.c to improve memory usage. Pre-allocate a block so
6161 that releasing the top of it at the end releases what was used for sub-
6162 expansions (unless the block got too big). However, discard this block if
6163 the first thing is a variable or header, so that we can use its block when
6164 it is dynamic (useful for very large $message_headers, for example).
6166 6. Lookups now cache *every* query, not just the most recent. A new, separate
6167 store pool is used for this. It can be recovered when all lookup caches are
6168 flushed. Lookups now release memory at the end of their result strings.
6169 This has involved some general refactoring of the lookup sources.
6171 7. Some code has been added to the store_xxx() functions to reduce the amount
6172 of flapping under certain conditions.
6174 8. log_incoming_interface used to affect only the <= reception log lines. Now
6175 it causes the local interface and port to be added to several more SMTP log
6176 lines, for example "SMTP connection from", and rejection lines.
6178 9. The Sieve author supplied some patches for the doc/README.SIEVE file.
6180 10. Added a conditional definition of _BSD_SOCKLEN_T to os.h-Darwin.
6182 11. If $host_data was set by virtue of a hosts lookup in an ACL, its value
6183 could be overwritten at the end of the current message (or the start of a
6184 new message if it was set in a HELO ACL). The value is now preserved for
6185 the duration of the SMTP connection.
6187 12. If a transport had a headers_rewrite setting, and a matching header line
6188 contained an unqualified address, that address was qualified, even if it
6189 did not match any rewriting rules. The underlying bug was that the values
6190 of the flags that permit the existence of unqualified sender and recipient
6191 addresses in header lines (set by {sender,recipient}_unqualified_hosts for
6192 non-local messages, and by -bnq for local messages) were not being
6193 preserved with the message after it was received.
6195 13. When Exim was logging an SMTP synchronization error, it could sometimes log
6196 "next input=" as part of the text comprising the host identity instead of
6197 the correct text. The code was using the same buffer for two different
6198 strings. However, depending on which order the printing function evaluated
6199 its arguments, the bug did not always show up. Under Linux, for example, my
6200 test suite worked just fine.
6202 14. Exigrep contained a use of Perl's "our" scoping after change 4.31/70. This
6203 doesn't work with some older versions of Perl. It has been changed to "my",
6204 which in any case is probably the better facility to use.
6206 15. A really picky compiler found some instances of statements for creating
6207 error messages that either had too many or two few arguments for the format
6210 16. The size of the buffer for calls to the DNS resolver has been increased
6211 from 1024 to 2048. A larger buffer is needed when performing PTR lookups
6212 for addresses that have a lot of PTR records. This alleviates a problem; it
6213 does not fully solve it.
6215 17. A dnsdb lookup for PTR records that receives more data than will fit in the
6216 buffer now truncates the list and logs the incident, which is the same
6217 action as happens when Exim is looking up a host name and its aliases.
6218 Previously in this situation something unpredictable would happen;
6219 sometimes it was "internal error: store_reset failed".
6221 18. If a server dropped the connection unexpectedly when an Exim client was
6222 using GnuTLS and trying to read a response, the client delivery process
6223 crashed while trying to generate an error log message.
6225 19. If a "warn" verb in an ACL added multiple headers to a message in a single
6226 string, for example:
6228 warn message = H1: something\nH2: something
6230 the text was added as a single header line from Exim's point of view
6231 though it ended up OK in the delivered message. However, searching for the
6232 second and subsequent header lines using $h_h2: did not work. This has been
6233 fixed. Similarly, if a system filter added multiple headers in this way,
6234 the routers could not see them.
6236 20. Expanded the error message when iplsearch is called with an invalid key to
6237 suggest using net-iplsearch in a host list.
6239 21. When running tests using -bh, any delays imposed by "delay" modifiers in
6240 ACLs are no longer actually imposed (and a message to that effect is
6243 22. If a "gecos" field in a passwd entry contained escaped characters, in
6244 particular, if it contained a \" sequence, Exim got it wrong when building
6245 a From: or a Sender: header from that name. A second bug also caused
6246 incorrect handling when an unquoted " was present following a character
6247 that needed quoting.
6249 23. "{crypt}" as a password encryption mechanism for a "crypteq" expansion item
6250 was not being matched caselessly.
6252 24. Arranged for all hyphens in the exim.8 source to be escaped with
6255 25. Change 16 of 4.32, which reversed 71 or 4.31 didn't quite do the job
6256 properly. Recipient callout cache records were still being keyed to include
6257 the sender, even when use_sender was set false. This led to far more
6258 callouts that were necessary. The sender is no longer included in the key
6259 when use_sender is false.
6261 26. Added "control = submission" modifier to ACLs.
6263 27. Added the ${base62d: operator to decode base 62 numbers.
6265 28. dnsdb lookups can now access SRV records.
6267 29. CONFIGURE_OWNER can be set at build time to define an alternative owner for
6268 the configuration file.
6270 30. The debug message "delivering xxxxxx-xxxxxx-xx" is now output in verbose
6271 (-v) mode. This makes the output for a verbose queue run more intelligible.
6273 31. Added a use_postmaster feature to recipient callouts.
6275 32. Added the $body_zerocount variable, containing the number of binary zero
6276 bytes in the message body.
6278 33. The time of last modification of the "new" subdirectory is now used as the
6279 "mailbox time last read" when there is a quota error for a maildir
6282 34. Added string comparison operators lt, lti, le, lei, gt, gti, ge, gei.
6284 35. Added +ignore_unknown as a special item in host lists.
6286 36. Code for decoding IPv6 addresses in host lists is now included, even if
6287 IPv6 support is not being compiled. This fixes a bug in which an IPv6
6288 address was recognized as an IP address, but was then not correctly decoded
6289 into binary, causing unexpected and incorrect effects when compared with
6296 1. Very minor rewording of debugging text in manualroute to say "list of
6297 hosts" instead of "hostlist".
6299 2. If verify=header_syntax was set, and a header line with an unqualified
6300 address (no domain) and a large number of spaces between the end of the
6301 name and the colon was received, the reception process suffered a buffer
6302 overflow, and (when I tested it) crashed. This was caused by some obsolete
6303 code that should have been removed. The fix is to remove it!
6305 3. When running in the test harness, delay a bit after writing a bounce
6306 message to get a bit more predictability in the log output.
6308 4. Added a call to search_tidyup() just before forking a reception process. In
6309 theory, someone could use a lookup in the expansion of smtp_accept_max_
6310 per_host which, without the tidyup, could leave open a database connection.
6312 5. Added the variables $recipient_data and $sender_data which get set from a
6313 lookup success in an ACL "recipients" or "senders" condition, or a router
6314 "senders" option, similar to $domain_data and $local_part_data.
6316 6. Moved the writing of debug_print from before to after the "senders" test
6319 7. Change 4.31/66 (moving the time when the Received: is generated) caused
6320 problems for message scanning, either using a data ACL, or using
6321 local_scan() because the Received: header was not generated till after they
6322 were called (in order to set the time as the time of reception completion).
6323 I have revised the way this works. The header is now generated after the
6324 body is received, but before the ACL or local_scan() are called. After they
6325 are run, the timestamp in the header is updated.
6331 1. Change 4.24/6 introduced a bug because the SIGALRM handler was disabled
6332 before starting a queue runner without re-exec. This happened only when
6333 deliver_drop_privilege was set or when the Exim user was set to root. The
6334 effect of the bug was that timeouts during subsequent deliveries caused
6335 crashes instead of being properly handled. The handler is now left at its
6336 default (and expected) setting.
6338 2. The other case in which a daemon avoids a re-exec is to deliver an incoming
6339 message, again when deliver_drop_privilege is set or Exim is run as root.
6340 The bug described in (1) was not present in this case, but the tidying up
6341 of the other signals was missing. I have made the two cases consistent.
6343 3. The ignore_target_hosts setting on a manualroute router was being ignored
6344 for hosts that were looked up using the /MX notation.
6346 4. Added /ignore=<ip list> feature to @mx_any, @mx_primary, and @mx_secondary
6349 5. Change 4.31/55 was buggy, and broke when there was a rewriting rule that
6350 operated on the sender address. After changing the $sender_address to <>
6351 for the sender address verify, Exim was re-instated it as the original
6352 (before rewriting) address, but remembering that it had rewritten it, so it
6353 wasn't rewriting it again. This bug also had the effect of breaking the
6354 sender address verification caching when the sender address was rewritten.
6356 6. The ignore_target_hosts option was being ignored by the ipliteral router.
6357 This has been changed so that if the ip literal address matches
6358 ignore_target_hosts, the router declines.
6360 7. Added expansion conditions match_domain, match_address, and match_local_
6361 part (NOT match_host).
6363 8. The placeholder for the Received: header didn't have a length field set.
6365 9. Added code to Exim itself and to exim_lock to test for a specific race
6366 condition that could lead to file corruption when using MBX delivery. The
6367 issue is with the lockfile that is created in /tmp. If this file is removed
6368 after a process has opened it but before that process has acquired a lock,
6369 there is the potential for a second process to recreate the file and also
6370 acquire a lock. This could lead to two Exim processes writing to the file
6371 at the same time. The added code performs the same test as UW imapd; it
6372 checks after acquiring the lock that its file descriptor still refers to
6373 the same named file.
6375 10. The buffer for building added header lines was of fixed size, 8192 bytes.
6376 It is now parameterized by HEADER_ADD_BUFFER_SIZE and this can be adjusted
6379 11. Added the smtp_active_hostname option. If used, this will typically be made
6380 to depend on the incoming interface address. Because $interface_address is
6381 not set up until the daemon has forked a reception process, error responses
6382 that can happen earlier (such as "too many connections") no longer contain
6385 12. If an expansion in a condition on a "warn" statement fails because a lookup
6386 defers, the "warn" statement is abandoned, and the next ACL statement is
6387 processed. Previously this caused the whole ACL to be aborted.
6389 13. Added the iplsearch lookup type.
6391 14. Added ident_timeout as a log selector.
6393 15. Added tls_certificate_verified as a log selector.
6395 16. Added a global option tls_require_ciphers (compare the smtp transport
6396 option of the same name). This controls incoming TLS connections.
6398 17. I finally figured out how to make tls_require_ciphers do a similar thing
6399 in GNUtls to what it does in OpenSSL, that is, set up an appropriate list
6400 before starting the TLS session.
6402 18. Tabs are now shown as \t in -bP output.
6404 19. If the log selector return_path_on_delivery was set, Exim crashed when
6405 bouncing a message because it had too many Received: header lines.
6407 20. If two routers both had headers_remove settings, and the first one included
6408 a superfluous trailing colon, the final name in the first list and the
6409 first name in the second list were incorrectly joined into one item (with a
6410 colon in the middle).
6416 1. Added -C and -D options to the exinext utility, mainly to make it easier
6417 to include in the automated testing, but these could be helpful when
6418 multiple configurations are in use.
6420 2. The exinext utility was not formatting the output nicely when there was
6421 an alternate port involved in the retry record key, nor when there was a
6422 message id as well (for retries that were specific to a specific message
6423 and a specific host). It was also confused by IPv6 addresses, because of
6424 the additional colons they contain. I have fixed the IPv4 problem, and
6425 patched it up to do a reasonable job for IPv6.
6427 3. When there is an error after a MAIL, RCPT, or DATA SMTP command during
6428 delivery, the log line now contains "pipelined" if PIPELINING was used.
6430 4. An SMTP transport process used to panic and die if the bind() call to set
6431 an explicit outgoing interface failed. This has been changed; it is now
6432 treated in the same way as a connect() failure.
6434 5. A reference to $sender_host_name in the part of a conditional expansion
6435 that was being skipped was still causing a DNS lookup. This no longer
6438 6. The def: expansion condition was not recognizing references to header lines
6439 that used bh_ and bheader_.
6441 7. Added the _cache feature to named lists.
6443 8. The code for checking quota_filecount in the appendfile transport was
6444 allowing one more file than it should have been.
6446 9. For compatibility with Sendmail, the command line option
6454 and sets the incoming protocol and host name (for trusted callers). The
6455 host name and its colon can be omitted when only the protocol is to be set.
6456 Note the Exim already has two private options, -pd and -ps, that refer to
6457 embedded Perl. It is therefore impossible to set a protocol value of "d" or
6458 "s", but I don't think that's a major issue.
6460 10. A number of refactoring changes to the code, none of which should affect
6463 (a) The number of logging options was getting close to filling up the
6464 32-bit word that was used as a bit map. I have split them into two classes:
6465 those that are passed in the argument to log_write(), and those that are
6466 only ever tested independently outside of that function. These are now in
6467 separate 32-bit words, so there is plenty of room for expansion again.
6468 There is no change in the user interface or the logging behaviour.
6470 (b) When building, for example, log lines, the code previously used a
6471 macro that called string_cat() twice, in order to add two strings. This is
6472 not really sufficiently general. Furthermore, there was one instance where
6473 it was actually wrong because one of the argument was used twice, and in
6474 one call a function was used. (As it happened, calling the function twice
6475 did not affect the overall behaviour.) The macro has been replaced by a
6476 function that can join an arbitrary number of extra strings onto a growing
6479 (c) The code for expansion conditions now uses a table and a binary chop
6480 instead of a serial search (which was left over from when there were very
6481 few conditions). Also, it now recognizes conditions like "pam" even when
6482 the relevant support is not compiled in: a suitably worded error message is
6483 given if an attempt is made to use such a condition.
6485 11. Added ${time_interval:xxxxx}.
6487 12. A bug was causing one of the ddress fields not to be passed back correctly
6488 from remote delivery subprocesses. The field in question was not being
6489 subsequently used, so this caused to problems in practice.
6491 13. Added new log selectors queue_time and deliver_time.
6493 14. Might have fixed a bug in maildirsizefile handling that threw up
6494 "unexpected character" debug warnings, and recalculated the data
6495 unnecessarily. In any case, I expanded the warning message to give more
6498 15. Added the message "Restricted characters in address" to the statements in
6499 the default ACL that block characters like @ and % in local parts.
6501 16. Change 71 for release 4.31 proved to be much less benign that I imagined.
6502 Three changes have been made:
6504 (a) There was a serious bug; a negative response to MAIL caused the whole
6505 recipient domain to be cached as invalid, thereby blocking all messages
6506 to all local parts at the same domain, from all senders. This bug has
6507 been fixed. The domain is no longer cached after a negative response to
6508 MAIL if the sender used is not empty.
6510 (b) The default behaviour of using MAIL FROM:<> for recipient callouts has
6513 (c) A new callout option, "use_sender" has been added for people who want
6514 the modified behaviour.
6520 1. Removed "EXTRALIBS=-lwrap" from OS/Makefile-Unixware7 on the advice of
6523 2. Removed "LIBS = -lresolv" from OS/Makefile-Darwin as it is not needed, and
6524 indeed breaks things for older releases.
6526 3. Added additional logging to the case where there is a problem reading data
6527 from a filter that is running in a subprocess using a pipe, in order to
6528 try to track down a specific problem.
6530 4. Testing facility fudge: when running in the test harness and attempting
6531 to connect to 10.x.x.x (expecting a connection timeout) I'm now sometimes
6532 getting "No route to host". Convert this to a timeout.
6534 5. Define ICONV_ARG2_TYPE as "char **" for Unixware7 to avoid compiler
6537 6. Some OS don't have socklen_t but use size_t instead. This affects the
6538 fifth argument of getsockopt() amongst other things. This is now
6539 configurable by a macro called SOCKLEN_T which defaults to socklen_t, but
6540 can be set for individual OS. I have set it for SunOS5, OSF1, and
6541 Unixware7. Current versions of SunOS5 (aka Solaris) do have socklen_t, but
6542 some earlier ones do not.
6544 7. Change 4.30/15 was not doing the test caselessly.
6546 8. The standard form for an IPv6 address literal was being rejected by address
6547 parsing in, for example, MAIL and RCPT commands. An example of this kind of
6548 address is [IPv6:2002:c1ed:8229:10:202:2dff:fe07:a42a]. Exim now accepts
6549 this, as well as the form without the "IPv6" on the front (but only when
6550 address literals are enabled, of course).
6552 9. Added some casts to avoid compiler warnings in OS/os.c-Linux.
6554 10. Exim crashed if a message with an empty sender address specified by -f
6555 encountered a router with an errors_to setting. This could be provoked only
6556 by a command such as
6560 where an empty string was supplied; "<>" did not hit this bug.
6562 11. Installed PCRE release 4.5.
6564 12. If EHLO/HELO was rejected by an ACL, the value of $sender_helo_name
6565 remained set. It is now erased.
6567 13. exiqgrep wasn't working on MacOS X because it didn't correctly compute
6568 times from message ids (which are base 36 rather than the normal 62).
6570 14. "Expected" SMTP protocol errors that can arise when PIPELINING is in use
6571 were being counted as actual protocol errors, and logged if the log
6572 selector +smtp_protocol_error was set. One cannot be perfect in this test,
6573 but now, if PIPELINING has been advertised, RCPT following a rejected MAIL,
6574 and DATA following a set of rejected RCPTs do not count as protocol errors.
6575 In other words, Exim assumes they were pipelined, though this may not
6576 actually be the case. Of course, in all cases the client gets an
6577 appropriate error code.
6579 15. If a lookup fails in an ACL condition, a message about the failure may
6580 be available; it is used if testing the ACL cannot continue, because most
6581 such messages specify what the cause of the deferral is. However, some
6582 messages (e.g. "MYSQL: no data found") do not cause a defer. There was bug
6583 that caused an old message to be retained and used if a later statement
6584 caused a defer, replacing the real cause of the deferral.
6586 16. If an IP address had so many PTR records that the DNS lookup buffer
6587 was not large enough to hold them, Exim could crash while trying to process
6588 the truncated data. It now detects and logs this case.
6590 17. Further to 4.21/58, another change has been made: if (and only if) the
6591 first line of a message (the first header line) ends with CRLF, a bare LF
6592 in a subsequent header line has a space inserted after it, so as not to
6593 terminate the header.
6595 18. Refactoring: tidied an ugly bit of code in appendfile that copied data
6596 unnecessarily, used atoi() instead of strtol(), and didn't check the
6597 termination when getting file sizes from file names by regex.
6599 19. Completely re-implemented the support for maildirsize files, in the light
6600 of a number of problems with the previous contributed implementation
6601 (4.30/29). In particular:
6603 . If the quota is zero, the maildirsize file is maintained, but no quota is
6606 . If the maildir directory does not exist, it is created before any attempt
6607 to write a maildirsize file.
6609 . The quota value in the file is just a cache; if the quota is changed in
6610 the transport, the new value overrides.
6612 . A regular expression is available for excluding directories from the
6615 20. The autoreply transport checks the characters in options that define the
6616 message's headers; it allows continued headers, but it was checking with
6617 isspace() after an embedded newline instead of explicitly looking for a
6620 21. If all the "regular" hosts to which an address was routed had passed their
6621 expiry times, and had not reached their retry times, the address was
6622 bounced, even if fallback hosts were defined. Now Exim should go on to try
6625 22. Increased buffer sizes in the callout code from 1024 to 4096 to match the
6626 equivalent code in the SMTP transport. Some hosts send humungous responses
6627 to HELO/EHLO, more than 1024 it seems.
6629 23. Refactoring: code in filter.c used (void *) for "any old type" but this
6630 gives compiler warnings in some environments. I've now done it "properly",
6633 24. The replacement for inet_ntoa() that is used with gcc on IRIX systems
6634 (because of problems with the built-in one) was declared to return uschar *
6635 instead of char *, causing compiler failure.
6637 25. Fixed a file descriptor leak when processing alias/forward files.
6639 26. Fixed a minor format string issue in dbfn.c.
6641 27. Typo in exim.c: ("dmbnz" for "dbmnz").
6643 28. If a filter file refered to $h_xxx or $message_headers, and the headers
6644 contained RFC 2047 "words", Exim's memory could, under certain conditions,
6647 29. When a sender address is verified, it is cached, to save repeating the test
6648 when there is more than one recipient in a message. However, when the
6649 verification involves a callout, it is possible for different callout
6650 options to be set for different recipients. It is too complicated to keep
6651 track of this in the cache, so now Exim always runs a verification when a
6652 callout is required, relying on the callout cache for the optimization.
6653 The overhead is duplication of the address routing, but this should not be
6656 30. Fixed a bug in callout caching. If a RCPT command caused the sender address
6657 to be verified with callout=postmaster, and the main callout worked but the
6658 postmaster check failed, the verification correctly failed. However, if a
6659 subsequent RCPT command asked for sender verification *without* the
6660 postmaster check, incorrect caching caused this verification also to fail,
6663 31. Exim caches DNS lookup failures so as to avoid multiple timeouts; however,
6664 it was not caching the DNS options (qualify_single, search_parents) that
6665 were used when the lookup failed. A subsequent lookup with different
6666 options therefore always gave the same answer, though there were cases
6667 where it should not have. (Example: a "domains = !$mx_any" option on a
6668 dnslookup router: the "domains" option is always processed without any
6669 widening, but the router might have qualify_single set.) Now Exim uses the
6670 cached value only when the same options are set.
6672 32. Added John Jetmore's "exipick" utility to the distribution.
6674 33. GnuTLS: When an attempt to start a TLS session fails for any reason other
6675 than a timeout (e.g. a certificate is required, and is not provided), an
6676 Exim server now closes the connection immediately. Previously it waited for
6677 the client to close - but if the client is SSL, it seems that they each
6678 wait for each other, leading to a delay before one of them times out.
6680 34: GnuTLS: Updated the code to use the new GnuTLS 1.0.0 API. I have not
6681 maintained 0.8.x compatibility because I don't think many are using it, and
6682 it is clearly obsolete.
6684 35. Added TLS support for CRLs: a tls_crl global option and one for the smtp
6687 36. OpenSSL: $tls_certificate_verified was being set to 1 even if the
6688 client certificate was expired. A simple patch fixes this, though I don't
6689 understand the full logic of why the verify callback is called multiple
6692 37. OpenSSL: a patch from Robert Roselius: "Enable client-bug workaround.
6693 Versions of OpenSSL as of 0.9.6d include a 'CBC countermeasure' feature,
6694 which causes problems with some clients (such as the Certicom SSL Plus
6695 library used by Eudora). This option, SSL_OP_DONT_INSERT_EMPTY_FRAGMENTS,
6696 disables the coutermeasure allowing Eudora to connect."
6698 38. Exim was not checking that a write() to a log file succeeded. This could
6699 lead to Bad Things if a log got too big, in particular if it hit a file
6700 size limit. Exim now panics and dies if it cannot write to a log file, just
6701 as it does if it cannot open a log file.
6703 39. Modified OS/Makefile-Linux so that it now contains
6705 CFLAGS=-O -D_FILE_OFFSET_BITS=64 -D_LARGEFILE_SOURCE
6707 The two -D definitions ensure that Exim is compiled with large file
6708 support, which makes it possible to handle log files that are bigger than
6711 40. Fixed a subtle caching bug: if (in an ACL or a set of routers, for
6712 instance) a domain was checked against a named list that involved a lookup,
6713 causing $domain_data to be set, then another domain was checked against the
6714 same list, then the first domain was re-checked, the value of $domain_data
6715 after the final check could be wrong. In particular, if the second check
6716 failed, it could be set empty. This bug probably also applied to
6719 41. The strip_trailing_dot option was not being applied to the address given
6720 with the -f command-line option.
6722 42. The code for reading a message's header from the spool was incrementing
6723 $received_count, but never initializing it. This meant that the value was
6724 incorrect (doubled) while delivering a message in the same process in which
6725 it was received. In the most common configuration of Exim, this never
6726 happens - a fresh exec is done - but it can happen when
6727 deliver_drop_privilege is set.
6729 43. When Exim logs an SMTP synchronization error - client data sent too soon -
6730 it now includes up to 150 characters of the unexpected data in the log
6733 44. The exim_dbmbuild utility uses fixed size buffers for reading input lines
6734 and building data strings. The size of both of these buffers was 10 000
6735 bytes - far larger than anybody would *ever* want, thought I. Needless to
6736 say, somebody hit the limit. I have increased the maximum line length to
6737 20 000 and the maximum data length of concatenated lines to 100 000. I have
6738 also fixed two bugs, because there was no checking on these buffers. Tsk,
6739 tsk. Now exim_dbmbuild gives a message and exits with an error code if a
6740 buffer is too small.
6742 45. The exim_dbmbuild utility did not support quoted keys, as Exim does in
6743 lsearch lookups. Now it does.
6745 46. When parsing a route_list item in a manualroute router, a fixed-length
6746 buffer was used for the list of hosts. I made this 1024 bytes long,
6747 thinking that nobody would ever have a list of hosts that long. Wrong.
6748 Somebody had a whole pile of complicated expansion conditions, and the
6749 string was silently truncated, leading to an expansion error. It turns out
6750 that it is easier to change to an unlimited length (owing to other changes
6751 that have happened since this code was originally written) than to build
6752 structure for giving a limitation error. The length of the item that
6753 expands into the list of hosts is now unlimited.
6755 47. The lsearch lookup could not handle data where the length of text line was
6756 more than 4095 characters. Such lines were truncated, leading to shortened
6757 data being returned. It should now handle lines of any length.
6759 48. Minor wording revision: "cannot test xxx in yyy ACL" becomes "cannot test
6760 xxx condition in yyy ACL" (e.g. "cannot test domains condition in DATA
6763 49. Cosmetic tidy to scripts like exicyclog that are generated by globally
6764 replacing strings such as BIN_DIRECTORY in a source file: the replacement
6765 no longer happens in comment lines. A list of replacements is now placed
6766 at the head of all of the source files, except those whose only change is
6767 to replace PERL_COMMAND in the very first #! line.
6769 50. Replaced the slow insertion sort in queue.c, for sorting the list of
6770 messages on the queue, with a bottom-up merge sort, using code contributed
6771 by Michael Haardt. This should make operations like -bp somewhat faster on
6772 large queues. It won't affect queue runners, except when queue_run_in_order
6775 51. Installed eximstats 1.31 in the distribution.
6777 52. Added support for SRV lookups to the dnslookup router.
6779 53. If an ACL referred to $message_body or $message_body_end, the value was not
6780 reset for any messages that followed in the same SMTP session.
6782 54. The store-handling optimization for building very long strings was not
6783 differentiating between the different store pools. I don't think this
6784 actually made any difference in practice, but I've tidied it.
6786 55. While running the routers to verify a sender address, $sender_address
6787 was still set to the sender address. This is wrong, because when routing to
6788 send a bounce to the sender, it would be empty. Therefore, I have changed
6789 it so that, while verifying a sender address, $sender_address is set to <>.
6790 (There is no change to what happens when verifying a recipient address.)
6792 56. After finding MX (or SRV) records, Exim was doing a DNS lookup for the
6793 target A or AAAA records (if not already returned) without resetting the
6794 qualify_single or search_parents options of the DNS resolver. These are
6795 inappropriate in this case because the targets of MX and SRV records must
6796 be FQDNs. A broken DNS record could cause trouble if it happened to have a
6797 target that, when qualified, matched something in the local domain. These
6798 two options are now turned off when doing these lookups.
6800 57. It seems that at least some releases of Reiserfs (which does not have the
6801 concept of a fixed number of inodes) returns zero and not -1 for the
6802 number of available inodes. This interacted badly with check_spool_inodes,
6803 which assumed that -1 was the "no such thing" setting. What I have done is
6804 to check that the total number of inodes is greater than zero before doing
6805 the test of how many are available.
6807 58. When a "warn" ACL statement has a log_message modifier, the message is
6808 remembered, and not repeated. This is to avoid a lot of repetition when a
6809 message has many recipients that cause the same warning to be written.
6810 However, Exim was preserving the list of already written lines for an
6811 entire SMTP session, which doesn't seem right. The memory is now reset if a
6812 new message is started.
6814 59. The "rewrite" debugging flag was not showing the result of rewriting in the
6815 debugging output unless log_rewrite was also set.
6817 60. Avoid a compiler warning on 64-bit systems in dsearch.c by avoiding the use
6818 of (int)(handle) when we know that handle contains (void *)(-1).
6820 61. The Exim daemon panic-logs an error return when it closes the incoming
6821 connection. However "connection reset by peer" seems to be common, and
6822 isn't really an error worthy of noting specially, so that particular error
6825 62. When Exim is trying to find all the local interfaces, it used to panic and
6826 die if the ioctl to get the interface flags failed. However, it seems that
6827 on at least one OS (Solaris 9) it is possible to have an interface that is
6828 included in the list of interfaces, but for which you get a failure error
6829 for this call. This happens when the interface is not "plumbed" into a
6830 protocol (i.e. neither IPv4 nor IPv6). I've changed the code so that a
6831 failure of the "get flags" call assumes that the interface is down.
6833 63. Added a ${eval10: operator, which assumes all numbers are decimal. This
6834 makes life easier for people who are doing arithmetic on fields extracted
6835 from dates, where you often get leading zeros that should not be
6836 interpreted as octal.
6838 64. Added qualify_domain to the redirect router, to override the global
6841 65. If a pathologically long header line contained very many addresses (the
6842 report of this problem mentioned 10 000) and each of them was rewritten,
6843 Exim could use up a very large amount of memory. (It kept on making new
6844 copies of the header line as it rewrote, and never released the old ones.)
6845 At the expense of a bit more processing, the header rewriting function has
6846 been changed so that it no longer eats memory in this way.
6848 66. The generation of the Received: header has been moved from the time that a
6849 message starts to be received, to the time that it finishes. The timestamp
6850 in the Received: header should now be very close to that of the <= log
6851 line. There are two side-effects of this change:
6853 (a) If a message is rejected by a DATA or non-SMTP ACL or local_scan(), the
6854 logged header lines no longer include the local Received: line, because
6855 it has not yet been created. The same applies to a copy of the message
6856 that is returned to a non-SMTP sender when a message is rejected.
6858 (b) When a filter file is tested using -bf, no additional Received: header
6859 is added to the test message. After some thought, I decided that this
6862 This change does not affect the value of $received_for. It is still set
6863 after address rewriting, but before local_scan() is called.
6865 67. Installed the latest Cygwin-specific files from the Cygwin maintainer.
6867 68. GnuTLS: If an empty file is specified for tls_verify_certificates, GnuTLS
6868 gave an unhelpful panic error message, and a defer error. I have managed to
6869 change this behaviour so that it now rejects any supplied certificate,
6870 which seems right, as the list of acceptable certificates is empty.
6872 69. OpenSSL: If an empty file is specified for tls_verify_certificates, OpenSSL
6873 gave an unhelpful defer error. I have not managed to make this reject any
6874 supplied certificates, but the error message it gives is "no certificate
6875 supplied", which is not helpful.
6877 70. exigrep's output now also includes lines that are not associated with any
6878 message, but which match the given pattern. Implemented by a patch from
6879 Martin Sluka, which also tidied up the Perl a bit.
6881 71. Recipient callout verification, like sender verification, was using <> in
6882 the MAIL FROM command. This isn't really the right thing, since the actual
6883 sender may affect whether the remote host accepts the recipient or not. I
6884 have changed it to use the actual sender in the callout; this means that
6885 the cache record is now keyed on a recipient/sender pair, not just the
6886 recipient address. There doesn't seem to be a real danger of callout loops,
6887 since a callout by the remote host to check the sender would use <>.
6888 [SEE ABOVE: changed after hitting problems.]
6890 72. Exim treats illegal SMTP error codes that do not begin with 4 or 5 as
6891 temporary errors. However, in the case of such a code being given after
6892 the end of a data transmission (i.e. after ".") Exim was failing to write
6893 a retry record for the message. (Yes, there was some broken host that was
6894 actually sending 8xx at this point.)
6896 73. An unknown lookup type in a host list could cause Exim to panic-die when
6897 the list was checked. (An example that provoked this was putting <; in the
6898 middle of a list instead of at the start.) If this happened during a DATA
6899 ACL check, a -D file could be left lying around. This kind of configuration
6900 error no longer causes Exim to die; instead it causes a defer error. The
6901 incident is still logged to the main and panic logs.
6903 74. Buglet left over from Exim 3 conversion. The message "too many messages
6904 in one connection" was written to the rejectlog but not the mainlog, except
6905 when address rewriting (yes!) was being logged.
6907 75. Added write_rejectlog option.
6909 76. When a system filter was run not as root (that is, when system_filter_user
6910 was set), the values of the $n variables were not being returned to the
6911 main process; thus, they were not subsequently available in the $sn
6914 77. Added +return_path_on_delivery log selector.
6916 78. A connection timeout was being treated differently from recipients deferred
6917 when testing hosts_max_try with a message that was older than the host's
6918 retry timeout. (The host should not be counted, thus allowing all hosts to
6919 be tried at least once before bouncing.) This may have been the cause of an
6920 occasionally reported bug whereby a message would remain on the queue
6921 longer than the retry timeout, but would be bounced if a delivery was
6922 forced. I say "may" because I never totally pinned down the problem;
6923 setting up timeout/retry tests is difficult. See also the next item.
6925 79. The ultimate address timeout was not being applied to errors that involved
6926 a combination of host plus message (for example, a timeout on a MAIL
6927 command). When an address resolved to a number of possible hosts, and they
6928 were not all tried for each delivery (e.g. because of hosts_max_try), a
6929 message could remain on the queue longer than the retry timeout.
6931 80. Sieve bug: "stop" inside "elsif" was broken. Applied a patch from Michael
6934 81. Fixed an obscure SMTP outgoing bug which required at least the following
6935 conditions: (a) there was another message waiting for the same server;
6936 (b) the server returned 5xx to all RCPT commands in the first message so
6937 that the message was not completed; (c) the server dropped the connection
6938 or gave a negative response to the RSET that Exim sends to abort the
6939 transaction. The observed case was a dropped connection after DATA that had
6940 been sent in pipelining mode. That is, the server had advertised PIPELINING
6941 but was not implementing it correctly. The effect of the bug was incorrect
6942 behaviour, such as trying another host, and this could lead to a crash.
6948 1. The 3rd arguments to getsockname(), getpeername(), and accept() in exim.c
6949 and daemon.c were passed as pointers to ints; they should have been
6950 pointers to socklen_t variables (which are typically unsigned ints).
6952 2. Some signed/unsigned type warnings in the os.c file for Linux have been
6955 3. Fixed a really odd bug that affected only the testing scheme; patching a
6956 certain fixed string in the binary changed the value of another string that
6957 happened to be identical to the end of the original first string.
6959 4. When gethostbyname() (or equivalent) is passed an IP address as a "host
6960 name", it returns that address as the IP address. On some operating
6961 systems (e.g. Solaris), it also passes back the IP address string as the
6962 "host name". However, on others (e.g. Linux), it passes back an empty
6963 string. Exim wasn't checking for this, and was changing the host name to an
6964 empty string, assuming it had been canonicalized.
6966 5. Although rare, it is permitted to have more than one PTR record for a given
6967 IP address. I thought that gethostbyaddr() or getipnodebyaddr() always gave
6968 all the names associated with an address, because they do in Solaris.
6969 However, it seems that they do not in Linux for data that comes from the
6970 DNS. If an address in /etc/hosts has multiple names, they _are_ all given.
6971 I found this out when I moved to a new Linux workstation and tried to run
6972 the Exim test suite.
6974 To get round this problem I have changed the code so that it now does its
6975 own call to the DNS to look up PTR records when searching for a host name.
6976 If nothing can be found in the DNS, it tries gethostbyaddr(), so that
6977 addresses that are only in /etc/hosts are still found.
6979 This behaviour is, however, controlled by an option called host_lookup_
6980 order, which defaults to "bydns:byaddr". If people want to use the other
6981 order, or indeed, just use one or the other means of lookup, they can
6982 specify it in this variable.
6984 6. If a PTR record yields an empty name, Exim treats it as non-existent. In
6985 some operating systems, this comes back from gethostbyaddr() as an empty
6986 string, and this is what Exim used to test for. However, it seems that in
6987 other systems, "." is yielded. Exim now tests for this case too.
6989 7. The values of check_spool_space and check_log_space are now held internally
6990 as a number of kilobytes instead of an absolute number of bytes. If a
6991 numbers is specified without 'K' or 'M', it is rounded up to the nearest
6992 kilobyte. This means that much larger values can be stored.
6994 8. Exim monitor: an attempt to get the action menu when not actually pointing
6995 at a message produces an empty menu entitled "No message selected". This
6996 works on Solaris (OpenWindows). However, XFree86 does not like a menu with
6997 no entries in it ("Shell widget menu has zero width and/or height"). So I
6998 have added a single, blank menu entry in this case.
7000 9. Added ${quote_local_part.
7002 10. MIME decoding is now applied to the contents of Subject: header lines when
7005 11. Now that a reference to $sender_host_address automatically causes a reverse
7006 lookup to occur if necessary (4.13/18), there is no need to arrange for a
7007 host lookup before query-style lookups in lists that might use this
7008 variable. This has therefore been abolished, and the "net-" prefix is no
7009 longer necessary for query-style lookups.
7011 12. The Makefile for SCO_SV contained a setting of LDFLAGS. This appears to
7012 have been a typo for LFLAGS, so it has been changed.
7014 13. The install script calls Exim with "-C /dev/null" in order to find the
7015 version number. If ALT_CONFIG_PREFIX was set, this caused an error message
7016 to be output. However, since Exim outputs its version number before the
7017 error, it didn't break the script. It just looked ugly. I fixed this by
7018 always allowing "-C /dev/null" if the caller is root.
7020 14. Ignore overlarge ACL variable number when reading spool file - insurance
7021 against a later release with more variables having written the file.
7023 15. The standard form for an IPv6 address literal was being rejected by EHLO.
7024 Example: [IPv6:2002:c1ed:8229:10:202:2dff:fe07:a42a]. Exim now accepts
7025 this, as well as the form without the "IPv6" on the front.
7027 16. Added CHOWN_COMMAND=/usr/sbin/chown and LIBS=-lresolv to the
7028 OS/Makefile-Darwin file.
7030 17. Fixed typo in lookups/ldap.c: D_LOOKUP should be D_lookup. This applied
7031 only to LDAP libraries that do not have LDAP_OPT_DEREF.
7033 18. After change 4.21/52, "%ld" was used to format the contents of the $inode
7034 variable. However, some OS use ints for inodes. I've added cast to long int
7035 to get rid of the compiler warning.
7037 19. I had forgotten to lock out "/../" in configuration file names when
7038 ALT_CONFIG_PREFIX was set.
7040 20. Routers used for verification do not need to specify transports. However,
7041 if such a router generated a host list, and callout was configured, Exim
7042 crashed, because it could not find a port number from the (non-existent)
7043 transport. It now assumes port 25 in this circumstance.
7045 21. Added the -t option to exigrep.
7047 22. If LOOKUP_LSEARCH is defined, all three linear search methods (lsearch,
7048 wildlsearch, nwildlsearch) are compiled. LOOKUP_WILDLSEARCH and LOOKUP_
7049 NWILDLSEARCH are now obsolete, but retained for compatibility. If either of
7050 them is set, LOOKUP_LSEARCH is forced.
7052 23. "exim -bV" now outputs a list of lookups that are included in the binary.
7054 24. Added sender and host information to the "rejected by local_scan()" log
7055 line; previously there was no indication of these.
7057 25. Added .include_if_exists.
7059 26. Change 3.952/11 added an explicit directory sync on top of a file sync for
7060 Linux. It turns out that not all file systems support this. Apparently some
7061 versions of NFS do not. (It's rare to put Exim's spool on NFS, but people
7062 do it.) To cope with this, the error EINVAL, which means that sync-ing is
7063 not supported on the file descriptor, is now ignored when Exim is trying to
7064 sync a directory. This applies only to Linux.
7066 27. Added -DBIND_8_COMPAT to the CLFAGS setting for Darwin.
7068 28. In Darwin (MacOS X), the PAM headers are in /usr/include/pam and not in
7069 /usr/include/security. There's now a flag in OS/os.h-Darwin to cope with
7072 29. Added support for maildirsize files from supplied patch (modified a bit).
7074 30. The use of :fail: followed by an empty string could lead Exim to respond to
7075 sender verification failures with (e.g.):
7077 550 Verification failed for <xxx>
7078 550 Sender verify failed
7080 where the first response line was missing the '-' that indicates it is not
7081 the final line of the response.
7083 31. The loop for finding the name of the user that called Exim had a hardwired
7084 limit of 10; it now uses the value of finduser_retries, which is used for
7085 all other user lookups.
7087 32. Added $received_count variable, available in data and not_smtp ACLs, and at
7090 33. Exim was neglecting to zero errno before one call of strtol() when
7091 expanding a string and expecting an integer value. On some systems this
7092 resulted in spurious "integer overflow" errors. Also, it was casting the
7093 result into an int without checking.
7095 34. Testing for a connection timeout using "timeout_connect" in the retry rules
7096 did not work. The code looks as if it has *never* worked, though it appears
7097 to have been documented since at least release 1.62. I have made it work.
7099 35. The "timeout_DNS" error in retry rules, also documented since at least
7100 1.62, also never worked. As it isn't clear exactly what this means, and
7101 clearly it isn't a major issue, I have abolished the feature by treating it
7102 as "timeout", and writing a warning to the main and panic logs.
7104 36. The display of retry rules for -brt wasn't always showing the error code
7107 37. Added new error conditions to retry rules: timeout_A, timeout_MX,
7108 timeout_connect_A, timeout_connect_MX.
7110 38. Rewriting the envelope sender at SMTP time did not allow it to be rewritten
7111 to the empty sender.
7113 39. The daemon was not analysing the content of -oX till after it had closed
7114 stderr and disconnected from the controlling terminal. This meant that any
7115 syntax errors were only noted on the panic log, and the return code from
7116 the command was 0. By re-arranging the code a little, I've made the
7117 decoding happen first, so such errors now appear on stderr, and the return
7118 code is 1. However, the actual setting up of the sockets still happens in
7119 the disconnected process, so errors there are still only recorded on the
7122 40. A daemon listener on a wildcard IPv6 socket that also accepts IPv4
7123 connections (as happens on some IP stacks) was logged at start up time as
7124 just listening for IPv6. It now logs "IPv6 with IPv4". This differentiates
7125 it from "IPv6 and IPv4", which means that two separate sockets are being
7128 41. The debug output for gethostbyname2() or getipnodebyname() failures now
7129 says whether AF_INET or AF_INET6 was passed as an argument.
7131 42. Exiwhat output was messed up when time zones were included in log
7134 43. Exiwhat now gives more information about the daemon's listening ports,
7135 and whether -tls-on-connect was used.
7137 44. The "port" option of the smtp transport is now expanded.
7139 45. A "message" modifier in a "warn" statement in a non-message ACL was being
7140 silently ignored. Now an error message is written to the main and panic
7143 46. There's a new ACL modifier called "logwrite" which writes to a log file
7144 as soon as it is encountered.
7146 47. Added $local_user_uid and $local_user_gid at routing time.
7148 48. Exim crashed when trying to verify a sender address that was being
7151 49. Exim was recognizing only a space character after ".include". It now also
7152 recognizes a tab character.
7154 50. Fixed several bugs in the Perl script that creates the exim.8 man page by
7155 extracting the relevant information from the specification. The man page no
7156 longer contains scrambled data for the -d option, and I've added a section
7157 at the front about calling Exim under different names.
7159 51. Added "extra_headers" argument to the "mail" command in filter files.
7161 52. Redirecting mail to an unqualified address in a Sieve filter caused Exim to
7164 53. Installed eximstats 1.29.
7166 54. Added transport_filter_timeout as a generic transport option.
7168 55. Exim no longer adds an empty Bcc: header to messages that have no To: or
7169 Cc: header lines. This was required by RFC 822, but it not required by RFC
7172 56. Exim used to add From:, Date:, and Message-Id: header lines to any
7173 incoming messages that did not have them. Now it does so only if the
7174 message originates locally, that is, if there is no associated remote host
7175 address. When Resent- header lines are present, this applies to the Resent-
7176 lines rather than the non-Resent- lines.
7178 57. Drop incoming SMTP connection after too many syntax or protocol errors. The
7179 limit is controlled by smtp_max_synprot_errors, defaulting to 3.
7181 58. Messages for configuration errors now include the name of the main
7182 configuration file - useful now that there may be more than one file in a
7183 list (.included file names were always shown).
7185 59. Change 4.21/82 (run initgroups() when starting the daemon) causes problems
7186 for those rare installations that do not start the daemon as root or run it
7187 setuid root. I've cut out the call to initgroups() if the daemon is not
7190 60. The Exim user and group can now be bound into the binary as text strings
7191 that are looked up at the start of Exim's processing.
7193 61. Applied a small patch for the Interbase code, supplied by Ard Biesheuvel.
7195 62. Added $mailstore_basename variable.
7197 63. Installed patch to sieve.c from Michael Haardt.
7199 64. When Exim failed to open the panic log after failing to open the main log,
7200 the original message it was trying to log was written to stderr and debug
7201 output, but if they were not available (the usual case in production), it
7202 was lost. Now it is written to syslog before the two lines that record the
7203 failures to open the logs.
7205 65. Users' Exim filters run in subprocesses under the user's uid. It is
7206 possible for a "deliver" command or an alias in a "personal" command to
7207 provoke an address rewrite. If logging of address rewriting is configured,
7208 this fails because the process is not running as root or exim. There may be
7209 a better way of dealing with this, but for the moment (because 4.30 needs
7210 to be released), I have disabled address rewrite logging when running a
7211 filter in a non-root, non-exim process.
7217 1. The buildconfig auxiliary program wasn't quoting the value set for
7218 HEADERS_CHARSET. This caused a compilation error complaining that 'ISO' was
7219 not defined. This bug was masked in 4.22 by the effect that was fixed in
7222 2. Some messages that were rejected after a message id was allocated were
7223 shown as "incomplete" by exigrep. It no longer does this for messages that
7224 are rejected by local_scan() or the DATA or non-SMTP ACLs.
7226 3. If a Message-ID: header used a domain literal in the ID, and Exim did not
7227 have allow_domain_literals set, the ID did not get logged in the <= line.
7228 Domain literals are now always recognized in Message-ID: header lines.
7230 4. The first argument for a ${extract expansion item is the key name or field
7231 number. Leading and trailing spaces in this item were not being ignored,
7232 causing some misleading effects.
7234 5. When deliver_drop_privilege was set, single queue runner processes started
7235 manually (i.e. by the command "exim -q") or by the daemon (which uses the
7236 same command in the process it spins off) were not dropping privilege.
7238 6. When the daemon running as "exim" started a queue runner, it always
7239 re-executed Exim in the spun-off process. This is a waste of effort when
7240 deliver_drop_privilege is set. The new process now just calls the
7241 queue-runner function directly.
7247 1. Typo in the src/EDITME file: it referred to HEADERS_DECODE_TO instead of
7250 2. Change 4.21/73 introduced a bug. The pid file path set by -oP was being
7251 ignored. Though the use of -oP was forcing the writing of a pid file, it
7252 was always written to the default place.
7254 3. If the message "no IP address found for host xxxx" is generated during
7255 incoming verification, it is now followed by identification of the incoming
7256 connection (so you can more easily find what provoked it).
7258 4. Bug fix for Sieve filters: "stop" inside a block was not working properly.
7260 5. Added some features to "harden" Exim a bit more against certain attacks:
7262 (a) There is now a build-time option called FIXED_NEVER_USERS that can
7263 be put in Local/Makefile. This is like the never_users runtime option,
7264 but it cannot be overridden. The default setting is "root".
7266 (b) If ALT_CONFIG_PREFIX is defined in Local/Makefile, it specifies a
7267 prefix string with which any file named in a -C command line option
7270 (c) If ALT_CONFIG_ROOT_ONLY is defined in Local/Makefile, root privilege
7271 is retained for -C and -D only if the caller of Exim is root. Without
7272 it, the exim user may also use -C and -D and retain privilege.
7274 (d) If DISABLE_D_OPTION is defined in Local/Makefile, the use of the -D
7275 command line option is disabled.
7277 6. Macro names set by the -D option must start with an upper case letter, just
7278 like macro names defined in the configuration file.
7280 7. Added "dereference=" facility to LDAP.
7282 8. Two instances of the typo "uknown" in the source files are fixed.
7284 9. If a PERL_COMMAND setting in Local/Makefile was not at the start of a line,
7285 the Configure-Makefile script screwed up while processing it.
7287 10. Incorporated PCRE 4.4.
7289 11. The SMTP synchronization check was not operating right at the start of an
7290 SMTP session. For example, it could not catch a HELO sent before the client
7291 waited for the greeting. There is now a check for outstanding input at the
7292 point when the greeting is written. Because of the duplex, asynchronous
7293 nature of TCP/IP, it cannot be perfect - the incorrect input may be on its
7294 way, but not yet received, when the check is performed.
7296 12. Added tcp_nodelay to make it possible to turn of the setting of TCP_NODELAY
7297 on TCP/IP sockets, because this apparently causes some broken clients to
7300 13. Installed revised OS/Makefile-CYGWIN and OS/os.c-cygwin (the .h file was
7301 unchanged) from the Cygwin maintainer.
7303 14. The code for -bV that shows what is in the binary showed "mbx" when maildir
7304 was supported instead of testing for mbx. Effectively a typo.
7306 15. The spa authenticator server code was not checking that the input it
7307 received was valid base64.
7309 16. The debug output line for the "set" modifier in ACLs was not showing the
7310 name of the variable that was being set.
7312 17. Code tidy: the variable type "vtype_string" was never used. Removed it.
7314 18. Previously, a reference to $sender_host_name did not cause a DNS reverse
7315 lookup on its own. Something else was needed to trigger the lookup. For
7316 example, a match in host_lookup or the need for a host name in a host list.
7317 Now, if $sender_host_name is referenced and the host name has not yet been
7318 looked up, a lookup is performed. If the lookup fails, the variable remains
7319 empty, and $host_lookup_failed is set to "1".
7321 19. Added "eqi" as a case-independent comparison operator.
7323 20. The saslauthd authentication condition could segfault if neither service
7324 nor realm was specified.
7326 21. If an overflowing value such as "2048M" was set for message_size_limit, the
7327 error message that was logged was misleading, and incoming SMTP
7328 connections were dropped. The message is now more accurate, and temporary
7329 errors are given to SMTP connections.
7331 22. In some error situations (such as 21 above) Exim rejects all SMTP commands
7332 (except RSET) with a 421 error, until QUIT is received. However, it was
7333 failing to send a response to QUIT.
7335 23. The HELO ACL was being run before the code for helo_try_verify_hosts,
7336 which made it impossible to use "verify = helo" in the HELO ACL. The HELO
7337 ACL is now run after the helo_try_verify_hosts code.
7339 24. "{MD5}" and "{SHA1}" are now recognized as equivalent to "{md5"} and
7340 "{sha1}" in the "crypteq" expansion condition (in fact the comparison is
7341 case-independent, so other case variants are also recognized). Apparently
7342 some systems use these upper case variants.
7344 25. If more than two messages were waiting for the same host, and a transport
7345 filter was specified for the transport, Exim sent two messages over the
7346 same TCP/IP connection, and then failed with "socket operation on non-
7347 socket" when it tried to send the third.
7349 26. Added Exim::debug_write and Exim::log_write for embedded Perl use.
7351 27. The extern definition of crypt16() in expand.c was not being excluded when
7352 the OS had its own crypt16() function.
7354 28. Added bounce_return_body as a new option, and bounce_return_size_limit
7355 as a preferred synonym for return_size_limit, both as an option and as an
7358 29. Added LIBS=-liconv to OS/Makefile-OSF1.
7360 30. Changed the default configuration ACL to relax the local part checking rule
7361 for addresses that are not in any local domains. For these addresses,
7362 slashes and pipe symbols are allowed within local parts, but the sequence
7363 /../ is explicitly forbidden.
7365 31. SPA server authentication was not clearing the challenge buffer before
7368 32. log_message in a "warn" ACL statement was writing to the reject log as
7369 well as to the main log, which contradicts the documentation and doesn't
7370 seem right (because no rejection is happening). So I have stopped it.
7372 33. Added Ard Biesheuvel's lookup code for accessing an Interbase database.
7373 However, I am unable to do any testing of this.
7375 34. Fixed an infelicity in the appendfile transport. When checking directories
7376 for a mailbox, to see if any needed to be created, it was accidentally
7377 using path names with one or more superfluous leading slashes; tracing
7378 would show up entries such as stat("///home/ph10", 0xFFBEEA48).
7380 35. If log_message is set on a "discard" verb in a MAIL or RCPT ACL, its
7381 contents are added to the log line that is written for every discarded
7382 recipient. (Previously a log_message setting was ignored.)
7384 36. The ${quote: operator now quotes the string if it is empty.
7386 37. The install script runs exim in order to find its version number. If for
7387 some reason other than non-existence or emptiness, which it checks, it
7388 could not run './exim', it was installing it with an empty version number,
7389 i.e. as "exim-". This error state is now caught, and the installation is
7392 38. An argument was missing from the function that creates an error message
7393 when Exim fails to connect to the socket for saslauthd authentication.
7394 This could cause Exim to crash, or give a corrupted message.
7396 39. Added isip, isip4, and isip6 to ${if conditions.
7398 40. The ACL variables $acl_xx are now saved with the message, and can be
7399 accessed later in routers, transports, and filters.
7401 41. The new lookup type nwildlsearch is like wildlsearch, except that the key
7402 strings in the file are not string-expanded.
7404 42. If a MAIL command specified a SIZE value that was too large to fit into an
7405 int variable, the check against message_size_limit failed. Such values are
7406 now forced to INT_MAX, which is around 2Gb for a 32-bit variable. Maybe one
7407 day this will have to be increased, but I don't think I want to be around
7408 when emails are that large.
7415 1. Removed HAVE_ICONV=yes from OS/Makefile-FreeBSD, since it seems that
7416 iconv() is not standard in FreeBSD.
7418 2. Change 4.21/17 was buggy and could cause stack overwriting on a system with
7419 IPv6 enabled. The observed symptom was a segmentation fault on return from
7420 the function os_common_find_running_interfaces() in src/os.c.
7422 3. In the check_special_case() function in daemon.c I had used "errno" as an
7423 argument name, which causes warnings on some systems. This was basically a
7424 typo, since it was named "eno" in the comments!
7426 4. The code that waits for the clock to tick (at a resolution of some fraction
7427 of a second) so as to ensure message-id uniqueness was always waiting for
7428 at least one whole tick, when it could have waited for less. [This is
7429 almost certainly not relevant at current processor speeds, where it is
7430 unlikely to ever wait at all. But we try to future-proof.]
7432 5. The function that sleeps for a time interval that includes fractions of a
7433 second contained a race. It did not block SIGALRM between setting the
7434 timer, and suspending (a couple of lines later). If the interval was short
7435 and the sigsuspend() was delayed until after it had expired, the suspension
7436 never ended. On busy systems this could lead to processes getting stuck for
7439 6. Some uncommon configurations may cause a lookup to happen in a queue runner
7440 process, before it forks any delivery processes. The open lookup caching
7441 mechanism meant that the open file or database connection was passed into
7442 the delivery process. The problem was that delivery processes always tidy
7443 up cached lookup data. This could cause a problem for the next delivery
7444 process started by the queue runner, because the external queue runner
7445 process does not know about the closure. So the next delivery process
7446 still has data in the lookup cache. In the case of a file lookup, there was
7447 no problem because closing a file descriptor in a subprocess doesn't affect
7448 the parent. However, if the lookup was caching a connection to a database,
7449 the connection was closed, and the second delivery process was likely to
7450 see errors such as "PGSQL: query failed: server closed the connection
7451 unexpectedly". The problem has been fixed by closing all cached lookups
7452 in a queue runner before running a delivery process.
7454 7. Compiler warning on Linux for the second argument of iconv(), which doesn't
7455 seem to have the "const" qualifier which it has on other OS. I've
7458 8. Change 4.21/2 was too strict. It is only if there are two authenticators
7459 *of the same type* (client or server) with the same public name that an
7460 error should be diagnosed.
7462 9. When Exim looked up a host name for an IP address, but failed to find the
7463 original IP address when looking up the host name (a safety check), it
7464 output the message "<ip address> does not match any IP for NULL", which was
7465 confusing, to say the least. The bug was that the host name should have
7466 appeared instead of "NULL".
7468 10. Since release 3.03, if Exim is called by a uid other than root or the Exim
7469 user that is built into the binary, and the -C or -D options is used, root
7470 privilege is dropped before the configuration file is read. In addition,
7471 logging is switched to stderr instead of the normal log files. If the
7472 configuration then re-defines the Exim user, the unprivileged environment
7473 is probably not what is expected, so Exim logs a panic warning message (but
7476 However, if deliver_drop_privilege is set, the unprivileged state may well
7477 be exactly what is intended, so the warning has been cut out in that case,
7478 and Exim is allowed to try to write to its normal log files.
7484 1. smtp_return_error_details was not giving details for temporary sender
7485 or receiver verification errors.
7487 2. Diagnose a configuration error if two authenticators have the same public
7490 3. Exim used not to create the message log file for a message until the first
7491 delivery attempt. This could be confusing when incoming messages were held
7492 for policy or load reasons. The message log file is now created at the time
7493 the message is received, and an initial "Received" line is written to it.
7495 4. The automatically generated man page for command line options had a minor
7496 bug that caused no ill effects; however, a more serious problem was that
7497 the procedure for building the man page automatically didn't always
7498 operate. Consequently, release 4.20 contains an out-of-date version. This
7499 shouldn't happen again.
7501 5. When building Exim with embedded Perl support, the script that builds the
7502 Makefile was calling 'perl' to find its compile-time parameters, ignoring
7503 any setting of PERL_COMMAND in Local/Makefile. This is now fixed.
7505 6. The freeze_tell option was not being used for messages that were frozen on
7506 arrival, either by an ACL or by local_scan().
7508 7. Added the smtp_incomplete_transaction log selector.
7510 8. After STARTTLS, Exim was not forgetting that it had advertised AUTH, so it
7511 was accepting AUTH without a new EHLO.
7513 9. Added tls_remember_esmtp to cope with YAEB. This allows AUTH and other
7514 ESMTP extensions after STARTTLS without a new EHLO, in contravention of the
7517 10. Logging of TCP/IP connections (when configured) now happens in the main
7518 daemon process instead of the child process, so that the TCP/IP connection
7519 count is more accurate (but it can never be perfect).
7521 11. The use of "drop" in a nested ACL was not being handled correctly in the
7522 outer ACL. Now, if condition failure induced by the nested "drop" causes
7523 the outer ACL verb to deny access ("accept" or "discard" after "endpass",
7524 or "require"), the connection is dropped.
7526 12. Similarly, "discard" in a nested ACL wasn't being handled. A nested ACL
7527 that yield "discard" can now be used with an "accept" or a "discard" verb,
7528 but an error is generated for any others (because I can't see a useful way
7529 to define what should happen).
7531 13. When an ACL is read dynamically from a file (or anywhere else), the lines
7532 are now processed in the same way as lines in the Exim configuration file.
7533 In particular, continuation lines are supported.
7535 14. Added the "dnslists = a.b.c!=n.n.n.n" feature.
7537 15. Added -ti meaning -t -i.
7539 16. Check for letters, digits, hyphens, and dots in the names of dnslist
7540 domains, and warn by logging if others are found.
7542 17. At least on BSD, alignment is not guaranteed for the array of ifreq's
7543 returned from GIFCONF when Exim is trying to find the list of interfaces on
7544 a host. The code in os.c has been modified to copy each ifreq to an aligned
7545 structure in all cases.
7547 Also, in some cases, the returned ifreq's were being copied to a 'struct
7548 ifreq' on the stack, which was subsequently passed to host_ntoa(). That
7549 means the last couple of bytes of an IPv6 address could be chopped if the
7550 ifreq contained only a normal sockaddr (14 bytes storage).
7552 18. Named domain lists were not supported in the hosts_treat_as_local option.
7553 An entry such as +xxxx was not recognized, and was treated as a literal
7556 19. Ensure that header lines added by a DATA ACL are included in the reject log
7557 if the ACL subsequently rejects the message.
7559 20. Upgrade the cramtest.pl utility script to use Digest::MD5 instead of just
7560 MD5 (which is deprecated).
7562 21. When testing a filter file using -bf, Exim was writing a message when it
7563 took the sender from a "From " line in the message, but it was not doing so
7564 when it took $return_path from a Return-Path: header line. It now does.
7566 22. If the contents of a "message" modifier for a "warn" ACL verb do not begin
7567 with a valid header line field name (a series of printing characters
7568 terminated by a colon, Exim now inserts X-ACL-Warn: at the beginning.
7570 23. Changed "disc" in the source to "disk" to conform to the documentation and
7571 the book and for uniformity.
7573 24. Ignore Sendmail's -Ooption=value command line item.
7575 25. When execve() failed while trying to run a command in a pipe transport,
7576 Exim was returning EX_UNAVAILABLE (69) from the subprocess. However, this
7577 could be confused with a return value of 69 from the command itself. This
7578 has been changed to 127, the value the shell returns if it is asked to run
7579 a non-existent command. The wording for the related log line suggests a
7580 non-existent command as the problem.
7582 26. If received_header_text expands to an empty string, do not add a Received:
7583 header line to the message. (Well, it adds a token one on the spool, but
7584 marks it "old" so that it doesn't get used or transmitted.)
7586 27. Installed eximstats 1.28 (addition of -nt option).
7588 28. There was no check for failure on the call to getsockname() in the daemon
7589 code. This can fail if there is a shortage of resources on the system, with
7590 ENOMEM, for example. A temporary error is now given on failure.
7592 29. Contrary to the C standard, it seems that in some environments, the
7593 equivalent of setlocale(LC_ALL, "C") is not obeyed at the start of a C
7594 program. Exim now does this explicitly; it affects the formatting of
7595 timestamps using strftime().
7597 30. If exiqsumm was given junk data, it threw up some uninitialized variable
7598 complaints. I've now initialized all the variables, to avoid this.
7600 32. Header lines added by a system filter were not being "seen" during
7601 transport-time rewrites.
7603 33. The info_callback() function passed to OpenSSL is set up with type void
7604 (*)(SSL *, int, int), as described somewhere. However, when calling the
7605 function (actually a macro) that sets it up, the type void(*)() is
7606 expected. I've put in a cast to prevent warnings from picky compilers.
7608 34. If a DNS black list lookup found a CNAME record, but there were no A
7609 records associated with the domain it pointed at, Exim crashed.
7611 35. If a DNS black list lookup returned more than one A record, Exim ignored
7612 all but the first. It now scans all returned addresses if a particular IP
7613 value is being sought. In this situation, the contents of the
7614 $dnslist_value variable are a list of all the addresses, separated by a
7617 36. Tightened up the rules for host name lookups using reverse DNS. Exim used
7618 to accept a host name and all its aliases if the forward lookup for any of
7619 them yielded the IP address of the incoming connection. Now it accepts only
7620 those names whose forward lookup yields the correct IP address. Any other
7621 names are discarded. This closes a loophole whereby a rogue DNS
7622 administrator could create reverse DNS records to break through a
7623 wildcarded host restriction in an ACL.
7625 37. If a user filter or a system filter that ran in a subprocess used any of
7626 the numerical variables ($1, $2 etc), or $thisaddress, in a pipe command,
7627 the wrong values were passed to the pipe command ($thisaddress had the
7628 value of $0, $0 had the value of $1, etc). This bug was introduced by
7629 change 4.11/101, and not discovered because I wrote an inadequate test. :-(
7631 38. Improved the line breaking for long SMTP error messages from ACLs.
7632 Previously, if there was no break point between 40 and 75 characters, Exim
7633 left the rest of the message alone. Two changes have been made: (a) I've
7634 reduced the minimum length to 35 characters; (b) if it can't find a break
7635 point between 35 and 75 characters, it looks ahead and uses the first one
7636 that it finds. This may give the occasional overlong line, but at least the
7637 remaining text gets split now.
7639 39. Change 82 of 4.11 was unimaginative. It assumed the limit on the number of
7640 file descriptors might be low, and that setting 1000 would always raise it.
7641 It turns out that in some environments, the limit is already over 1000 and
7642 that lowering it causes trouble. So now Exim takes care not to decrease it.
7644 40. When delivering a message, the value of $return_path is set to $sender_
7645 address at the start of routing (routers may change the value). By an
7646 oversight, this default was not being set up when an address was tested by
7647 -bt or -bv, which affected the outcome if any router or filter referred to
7650 41. The idea of the "warn" ACL verb is that it adds a header or writes to the
7651 log only when "message" or "log_message" are set. However, if one of the
7652 conditions was an address verification, or a call to a nested ACL, the
7653 messages generated by the underlying test were being passed through. This
7654 no longer happens. The underlying message is available in $acl_verify_
7655 message for both "message" and "log_message" expansions, so it can be
7656 passed through if needed.
7658 42. Added RFC 2047 interpretation of header lines for $h_ expansions, with a
7659 new expansion $bh_ to give the encoded byte string without charset
7660 translation. Translation happens only if iconv() is available; HAVE_ICONV
7661 indicates this at build time. HEADERS_CHARSET gives the charset to
7662 translate to; headers_charset can change it in the configuration, and
7663 "headers charset" can change it in an individual filter file.
7665 43. Now that we have a default RFC 2047 charset (see above), the code in Exim
7666 that creates RFC 2047 encoded "words" labels them as that charset instead
7667 of always using iso-8859-1. The cases are (i) the explicit ${rfc2047:
7668 expansion operator; (ii) when Exim creates a From: line for a local
7669 message; (iii) when a header line is rewritten to include a "phrase" part.
7671 44. Nasty bug in exiqsumm: the regex to skip already-delivered addresses was
7672 buggy, causing it to skip the first lines of messages whose message ID
7673 ended in 'D'. This would not have bitten before Exim release 4.14, because
7674 message IDs were unlikely to end in 'D' before then. The effect was to have
7675 incorrect size information for certain domains.
7677 45. #include "config.h" was missing at the start of the crypt16.c module. This
7678 caused trouble on Tru64 (aka OSF1) systems, because HAVE_CRYPT16 was not
7681 46. If there was a timeout during a "random" callout check, Exim treated it as
7682 a failure of the random address, and carried on sending RSET and the real
7683 address. If the delay was just some slowness somewhere, the response to the
7684 original RCPT would be taken as a response to RSET and so on, causing
7685 mayhem of various kinds.
7687 47. Change 50 for 4.20 was a heap of junk. I don't know what I was thinking
7688 when I implemented it. It didn't allow for the fact that some option values
7689 may legitimately be negative (e.g. size_addition), and it didn't even do
7690 the right test for positive values.
7692 48. Domain names in DNS records are case-independent. Exim always looks them up
7693 in lower case. Some resolvers return domain names in exactly the case they
7694 appear in the zone file, that is, they may contain uppercase letters. Not
7695 all resolvers do this - some return always lower case. Exim was treating a
7696 change of case by a resolver as a change of domain, similar to a widening
7697 of a domain abbreviation. This triggered its re-routing code and so it was
7698 trying to route what was effectively the same domain again. This normally
7699 caused routing to fail (because the router wouldn't handle the domain
7700 twice). Now Exim checks for this case specially, and just changes the
7701 casing of the domain that it ultimately uses when it transmits the message
7704 49. Added Sieve (RFC 3028) support, courtesy of Michael Haardt's contributed
7707 50. If a filter generated a file delivery with a non-absolute name (possible if
7708 no home directory exists for the router), the forbid_file option was not
7711 51. Added '&' feature to dnslists, to provide bit mask matching in addition to
7712 the existing equality matching.
7714 52. Exim was using ints instead of ino_t variables in some places where it was
7715 dealing with inode numbers.
7717 53. If TMPDIR is defined in Local/Makefile (default in src/EDITME is
7718 TMPDIR="/tmp"), Exim checks for the presence of an environment variable
7719 called TMPDIR, and if it finds it is different, it changes its value.
7721 54. The smtp_printf() function is now made available to local_scan() so
7722 additional output lines can be written before returning. There is also an
7723 smtp_fflush() function to enable the detection of a dropped connection.
7724 The variables smtp_input and smtp_batched_input are exported to
7727 55. Changed the default runtime configuration: the message "Unknown user"
7728 has been removed from the ACL, and instead placed on the localuser router,
7729 using the cannot_route_message feature. This means that any verification
7730 failures that generate their own messages won't get overridden. Similarly,
7731 the "Unrouteable address" message that was in the ACL for unverifiable
7732 relay addresses has also been removed.
7734 56. Added hosts_avoid_esmtp to the smtp transport.
7736 57. The exicyclog script was not checking for the esoteric option
7737 CONFIGURE_FILE_USE_EUID in the Local/Makefile. It now does this, but it
7738 will work only if exicyclog is run under the appropriate euid.
7740 58. Following a discussion on the list, the rules by which Exim recognises line
7741 endings on incoming messages have been changed. The -dropcr and drop_cr
7742 options are now no-ops, retained only for backwards compatibility. The
7743 following line terminators are recognized: LF CRLF CR. However, special
7744 processing applies to CR:
7746 (i) The sequence CR . CR does *not* terminate an incoming SMTP message,
7747 nor a local message in the state where . is a terminator.
7749 (ii) If a bare CR is encountered in a header line, an extra space is added
7750 after the line terminator so as not to end the header. The reasoning
7751 behind this is that bare CRs in header lines are most likely either
7752 to be mistakes, or people trying to play silly games.
7754 59. The size of a message, as listed by "-bp" or in the Exim monitor window,
7755 was being incorrectly given as 18 bytes larger than it should have been.
7756 This is a VOB (very old bug).
7758 60. This may never have affected anything current, but just in case it has:
7759 When the local host is found other than at the start of a list of hosts,
7760 the local host, those with the same MX, and any that follow, are discarded.
7761 When the list in question was part of a longer list of hosts, the following
7762 hosts (not currently being processed) were also being discarded. This no
7763 longer happens. I'm not sure if this situation could ever has previously
7766 61. Added the "/MX" feature to lists of hosts in the manualroute and query
7769 62. Whenever Exim generates a new message, it now adds an Auto-Submitted:
7770 header. This is something that is recommended in a new Internet Draft, and
7771 is something that is documented as being done by Sendmail. There are two
7772 possible values. For messages generated by the autoreply transport, Exim
7775 Auto-Submitted: auto-replied
7777 whereas for all other generated messages (e.g. bounces) it adds
7779 Auto-Submitted: auto-generated
7781 63. The "personal" condition in filters now includes a test for the
7782 Auto-Submitted: header. If it contains the string "auto-" the message it
7783 not considered personal.
7785 64. Added rcpt_include_affixes as a generic transport option.
7787 65. Added queue_only_override (default true).
7789 66. Added the syslog_duplication option.
7791 67. If what should have been the first header line of a message consisted of
7792 a space followed by a colon, Exim was mis-interpreting it as a header line.
7793 It isn't of course - it is syntactically invalid and should therefore be
7794 treated as the start of the message body. The misbehaviour could have
7795 caused a number of strange effects, including loss of data in subsequent
7796 header lines, and spool format errors.
7798 68. Formerly, the AUTH parameter on a MAIL command was trusted only if the
7799 client host had authenticated. This control can now be exercised by an ACL
7800 for more flexibility.
7802 69. By default, callouts do not happen when testing with -bh. There is now a
7803 variant, -bhc, which does actually run the callout code, including
7804 consulting and updating the callout cache.
7806 70. Added support for saslauthd authentication, courtesy of Alexander
7809 71. If statvfs() failed on the spool or log directories while checking their
7810 size for availability, Exim confusingly gave the error "space shortage".
7811 Furthermore, in debugging mode it crashed with a floating point exception.
7812 These checks are done if check_{spool,log}_{space,inodes} are set, and when
7813 an SMTP message arrives with SIZE= on the MAIL command. As this is a really
7814 serious problem, Exim now writes to the main and panic logs when this
7815 happens, with details of the failure. It then refuses to accept the
7816 incoming message, giving the message "spool directory problem" or "log
7817 directory problem" with a 421 code for SMTP messages.
7819 72. When Exim is about to re-exec itself, it ensures that the file descriptors
7820 0, 1, and 2 exist, because some OS complain for execs without them (see
7821 ChangeLog 4.05/30). If necessary, Exim opens /dev/null to use for these
7822 descriptors. However, the code omitted to check that the open succeeded,
7823 causing mysterious errors if for some reason the permissions on /dev/null
7824 got screwed. Now Exim writes a message to the main and panic logs, and
7825 bombs out if it can't open /dev/null.
7827 73. Re-vamped the way daemon_smtp_port, local_interfaces, and -oX work and
7828 interact so that it is all more flexible. It is supposed to remain
7829 backwards compatible. Also added extra_local_interfaces.
7831 74. Invalid data sent to a SPA (NTLM) server authenticator could cause the code
7832 to bomb out with an assertion failure - to the client this appears as a
7833 connection drop. This problem occurs in the part of the code that was taken
7834 from the Samba project. Fortunately, the assertion is in a very simple
7835 function, so I have fixed this by reproducing the function inline in the
7836 one place where it is called, and arranging for authentication to fail
7837 instead of killing the process with assert().
7839 75. The SPA client code was not working when the server requested OEM rather
7840 than Unicode encoding.
7842 76. Added code to make require_files with a specific uid setting more usable in
7843 the case where statting the file as root fails - usually a non-root-mounted
7844 NFS file system. When this happens and the failure is EACCES, Exim now
7845 forks a subprocess and does the per-uid checking as the relevant uid.
7847 77. Added process_log_path.
7849 78. If log_file_path was not explicitly set, a setting of check_log_space or
7850 check_log_inodes was ignored.
7852 79. If a space check for the spool or log partitions fails, the incident is now
7853 logged. Of course, in the latter case the data may get lost...
7855 80. Added the %p formatting code to string_format() so that it can be used to
7856 print addresses in debug_print(). Adjusted all the address printing in the
7857 debugging in store.c to use %p rather than %d.
7859 81. There was a concern that a line of code in smtp_in.c could overflow a
7860 buffer if a HELO/EHLO command was given followed by 500 or so spaces. As
7861 initially expressed, the concern was not well-founded, because trailing
7862 spaces are removed early. However, if the trailing spaces were followed by
7863 a NULL, they did not get removed, so the overflow was possible. Two fixes
7866 (a) I re-wrote the offending code in a cleaner fashion.
7867 (b) If an incoming SMTP command contains a NULL character, it is rejected
7870 82. When Exim changes uid/gid to the Exim user at daemon start time, it now
7871 runs initgroups(), so that if the Exim user is in any additional groups,
7872 they will be used during message reception.
7878 The change log for 4.20 and earlier releases has been archived.
git://git.exim.org / exim.git / blob