1 This document describes *changes* to previous versions, that might
2 affect Exim's operation, with an unchanged configuration file. For new
3 options, and new features, see the NewStuff file next to this ChangeLog.
9 JH/01 Bug 1329: Fix format of Maildir-format filenames to match other mail-
10 related applications. Previously an "H" was used where available info
11 says that "M" should be, so change to match.
13 JH/02 Bug 2587: Fix pam expansion condition. Tainted values are commonly used
14 as arguments, so an implementation trying to copy these into a local
15 buffer was taking a taint-enforcement trap. Fix by using dynamically
16 created buffers. Similar fix for radius expansion condition.
18 JH/03 Bug 2586: Fix listcount expansion operator. Using tainted arguments is
19 reasonable, eg. to count headers. Fix by using dynamically created
20 buffers rather than a local. Do similar fixes for ACL actions "dcc",
21 "log_reject_target", "malware" and "spam"; the arguments are expanded
22 so could be handling tainted values.
24 JH/04 Bug 2590: Fix -bi (newaliases). A previous code rearrangement had
25 broken the (no-op) support for this sendmail command. Restore it
26 to doing nothing, silently, and returning good status.
28 JH/05 Bug 2593: Fix "vacation" in Exim filter. Previously, when a "once"
29 record path was given (or the default used) without a leading directory
30 path, an error occurred on trying to open it. Use the transport's working
33 JH/06 Bug 2594: Change the name used for certificate name checks in the smtp
34 transport. Previously it was the name on the DNS A-record; use instead
35 the head of the CNAME chain leading there (if there is one). This seems
36 to align better with RFC 6125.
38 JH/07 Bug 2597: Fix a resource leak. Using a lookup in obtaining a value for
39 smtp_accept_max_per_host allocated resources which were not released
40 when the limit was exceeded. This eventually crashed the daemon. Fix
41 by adding a relase action in that path.
43 JH/08 Bug 2598: Fix verify ACL condition. The options for the condition are
44 expanded; previously using tainted values was rejected. Fix by using
45 dynamically-created buffers.
47 JH/09 Relax restrictions on ACL verify condition needing access to message
48 headers. Previously they were only permitted in data and non-smtp ACLs;
49 permit also mime, dkim, prdr quit and notquit. Applies to header-syntax,
50 not_blind, header_sender and header_names_ascii verification.
52 JH/10 Bug 2603: Fix coding of string copying to only evaluate arguments once.
53 Previously a macro used one argument twice; when called with the
54 argument as an expression having side-effects, incorrect operation
55 resulted. Use an inlineable function.
57 JH/11 Bug 2604: Fix request to cutthrough-deliver when a connection is already
58 held open for a verify callout. Previously this wan not accounted for
59 and a corrupt onward SMTP conversation resulted.
61 JH/12 Bug 2607: Fix the ${srs_encode } expansion to handle quoted local_parts.
62 Previously they were embedded naively in the constructed address; when
63 needed, strip the quoting and quote the entire local_part.
64 Also make the inbound_srs expansion condition handle quoting.
66 JH/13 Fix dsearch "subdir" filter to ignore ".". Previously only ".." was
67 excluded, not matching the documentation.
69 JH/14 Bug 2606: Fix a segfault in sqlite lookups. When no, or a bad, filename
70 was given for the sqlite_dbfile a trap resulted.
72 JH/15 Bug 2620: Fix "spam" ACL condition. Previously, tainted values for the
73 "name" argument resulted in a trap. There is no reason to disallow such;
74 this was a coding error.
76 JH/16 Bug 2615: Fix pause during message reception, on systems that have been
77 suspended/resumed. The Linux CLOCK_MONOTONIC does not account for time
78 spent suspended, ignoring the Posix definition. Previously we assumed
79 it did and a constant offset from real time could be used as a correction.
80 Change to using the same clock source for the start-of-message and the
81 post-message next-tick-wait. Also change to using CLOCK_BOOTTIME if it
82 exists, just to get a clock slightly more aligned to reality.
84 JH/17 Bug 2295: Fix DKIM signing to always semicolon-terminate. Although the
85 RFC says it is optional some validators care. The missing char was not
86 intended but triggered by a line-wrap alignement. Discovery and fix by
87 Guillaume Outters, hacked on by JH.
89 JH/18 Bug 2617: Fix a taint trap in parse_fix_phrase(). Previously when the
90 name being quoted was tainted a trap would be taken. Fix by using
91 dynamicaly created buffers. The routine could have been called by a
92 rewrite with the "h" flag, by using the "-F" command-line option, or
93 by using a "name=" option on a control=submission ACL modifier.
95 JH/19 SPF: change the Authentication-Results expansion component to give
96 smtp.helo when the sender domain is empty. Previously it gave
99 JH/20 Bug 2631: ACL dnslist conditions now ignore and log any lookups returns
100 not in 127.0.0.0/8 to help in spotting list domains taken over by a
101 domain-parking registrar.
103 JH/21 Bug 2630: Fix eol-replacement string for the ${readsocket } expansion.
104 Previously when a whitespace character was specified it was not inserted
105 after removing the newline.
107 JH/22 Bug 2265: Force SNI usage for smtp transport DANE'd connections, to be
108 the domain part of the recipient address. This overrides any tls_sni
109 option set, which was previously used.
111 JH/23 Logging: with the +tls_sni log_selector, do not wrap the received SNI
114 JH/24 Bug 2634: Fix a taint trap seen on NetBSD: the testing coded for
115 is_tainted() had an off-by-one error in the overenthusiastic direction.
116 Find and fix by Gavan. Although NetBSD is not a supported platform for
117 4.94 this bug could affect other platforms.
119 PP/01 Fix default prime selection to be consistent.
120 One path used ike23 still, instead of exim.dev.20160529.3; now both
121 execution flows will use the same DH primes (currently
122 exim.dev.20160529.3).
124 JH/25 OpenSSL: Fix back-compatibility behaviour surrounding tls_certificates
125 option in smtp transport, to match the documentation. Previously
126 verification was not being done in some cases where it should have been.
128 JH/26 Bug 2646: fix a memory usage issue in ldap lookups. Previously, when more
129 than one server was defined and depending on the platform memory layout
130 details, an internal consistency trap could be hit while walking the list
133 JH/27 Bug 2648: fix the passing of an authenticator public-name through spool
134 files. The value is used by the authresults expansion item. Previously
135 if this was used in a router or transport, a crash could result.
137 JH/28 Fix spurious logging of select error. Some platforms, notably FreeBSD,
138 have a sufficient incidence of EINTR returns from select that an
139 interaction with other operations done by the main daemon loop exposed
140 a bug in the error-handling. This was benign apart from the log
143 JH/29 Bug 2675: add outgoing-interface I= element to deferred "==" log lines,
144 for consistency with delivered "=>" and failed "**" lines. While we're
145 there, handle PRX and TFO.
147 JH/30 Bug 2677: fix matching of long addresses. Since 4.93 a limit of 256 was
148 applied. This resulted, if any header-line rewrite rules were configured,
149 in a panic-log trigerrable by sending a message with a long address in
150 a header. Fix by increaing the arbitrary limit to larger than a single
151 (dewrapped) 5322 header line maximum size.
157 JH/01 Avoid costly startup code when not strictly needed. This reduces time
158 for some exim process initialisations. It does mean that the logging
159 of TLS configuration problems is only done for the daemon startup.
161 JH/02 Early-pipelining support code is now included unless disabled in Makefile.
163 JH/03 DKIM verification defaults no long accept sha1 hashes, to conform to
164 RFC 8301. They can still be enabled, using the dkim_verify_hashes main
167 JH/04 Support CHUNKING from an smtp transport using a transport_filter, when
168 DKIM signing is being done. Previously a transport_filter would always
169 disable CHUNKING, falling back to traditional DATA.
171 JH/05 Regard command-line recipients as tainted.
173 JH/06 Bug 340: Remove the daemon pid file on exit, when due to SIGTERM.
175 JH/07 Bug 2489: Fix crash in the "pam" expansion condition. It seems that the
176 PAM library frees one of the arguments given to it, despite the
177 documentation. Therefore a plain malloc must be used.
179 JH/08 Bug 2491: Use tainted buffers for the transport smtp context. Previously
180 on-stack buffers were used, resulting in a taint trap when DSN information
181 copied from a received message was written into the buffer.
183 JH/09 Bug 2493: Harden ARC verify against Outlook, whick has been seen to mix
184 the ordering of its ARC headers. This caused a crash.
186 JH/10 Bug 2492: Use tainted memory for retry record when needed. Previously when
187 a new record was being constructed with information from the peer, a trap
190 JH/11 Bug 2494: Unset the default for dmarc_tld_file. Previously a naiive
191 installation would get error messages from DMARC verify, when it hit the
192 nonexistent file indicated by the default. Distros wanting DMARC enabled
193 should both provide the file and set the option.
194 Also enforce no DMARC verification for command-line sourced messages.
196 JH/12 Fix an uninitialised flag in early-pipelining. Previously connections
197 could, depending on the platform, hang at the STARTTLS response.
199 JH/13 Bug 2498: Reset a counter used for ARC verify before handling another
200 message on a connection. Previously if one message had ARC headers and
201 the following one did not, a crash could result when adding an
202 Authentication-Results: header.
204 JH/14 Bug 2500: Rewind some of the common-coding in string handling between the
205 Exim main code and Exim-related utities. The introduction of taint
206 tracking also did many adjustments to string handling. Since then, eximon
207 frequently terminated with an assert failure.
209 JH/15 When PIPELINING, synch after every hundred or so RCPT commands sent and
210 check for 452 responses. This slightly helps the inefficieny of doing
211 a large alias-expansion into a recipient-limited target. The max_rcpt
212 transport option still applies (and at the current default, will override
213 the new feature). The check is done for either cause of synch, and forces
214 a fast-retry of all 452'd recipients using a new MAIL FROM on the same
215 connection. The new facility is not tunable at this time.
217 JH/16 Fix the variables set by the gsasl authenticator. Previously a pointer to
218 library live data was being used, so the results became garbage. Make
219 copies while it is still usable.
221 JH/17 Logging: when the deliver_time selector ise set, include the DT= field
222 on delivery deferred (==) and failed (**) lines (if a delivery was
223 attemtped). Previously it was only on completion (=>) lines.
225 JH/18 Authentication: the gsasl driver not provides the $authN variables in time
226 for the expansion of the server_scram_iter and server_scram_salt options.
228 WB/01 SPF: DNS lookups for the obsolete SPF RR type done by the libspf2 library
229 are now specifically given a NO_DATA response without hitting the system
230 resolver. The library goes on to do the now-standard TXT lookup.
231 Use of dnsdb lookups is not affected.
233 JH/19 Bug 2507: Modules: on handling a dynamic-module (lookups) open failure,
234 only retrieve the errormessage once. Previously two calls to dlerror()
235 were used, and the second one (for mainlog/paniclog) retrieved null
238 JH/20 Taint checking: disallow use of tainted data for
239 - the appendfile transport file and directory options
240 - the pipe transport command
241 - the autoreply transport file, log and once options
242 - file names used by the redirect router (including filter files)
244 - paths used by single-key lookups
245 Previously this was permitted.
247 JH/21 Bug 2501: Fix init call in the heimdal authenticator. Previously it
248 adjusted the size of a major service buffer; this failed because the
249 buffer was in use at the time. Change to a compile-time increase in the
250 buffer size, when this authenticator is compiled into exim.
252 JH/22 Taint-checking: move to safe-mode taint checking on all platforms. The
253 previous fast-mode was untenable in the face of glibs using mmap to
254 support larger malloc requests.
256 PP/01 Update the openssl_options possible values through OpenSSL 1.1.1c.
257 New values supported, if defined on system where compiled:
258 allow_no_dhe_kex, cryptopro_tlsext_bug, enable_middlebox_compat,
259 no_anti_replay, no_encrypt_then_mac, prioritize_chacha, tlsext_padding
261 JH/23 Performance improvement in the initial phase of a two-pass queue run. By
262 running a limited number of proceses in parallel, a benefit is gained. The
263 amount varies with the platform hardware and load. The use of the option
264 queue_run_in_order means we cannot do this, as ordering becomes
267 JH/24 Bug 2524: fix the cyrus_sasl auth driver gssapi usage. A previous fix
268 had introduced a string-copy (for ensuring NUL-termination) which was not
269 appropriate for that case, which can include embedded NUL bytes in the
270 block of data. Investigation showed the copy to actually be needless, the
271 data being length-specified.
273 JH/25 Fix use of concurrent TLS connections under GnuTLS. When a callout was
274 done during a receiving connection, and both used TLS, global info was
275 used rather than per-connection info for tracking the state of data
276 queued for transmission. This could result in a connection hang.
278 JH/26 Fix use of the SIZE parameter on MAIL commands, on continued connections.
279 Previously, when delivering serveral messages down a single connection
280 only the first would provide a SIZE. This was due to the size information
281 not being properly tracked.
283 JH/27 Bug 2530: When operating in a timezone with sub-minute offset, such as
284 TAI (at 37 seconds currently), pretend to be in UTC for time-related
285 expansion and logging. Previously, spurious values such as a future
286 minute could be seen.
288 JH/28 Bug 2533: Fix expansion of ${tr } item. When called in some situations
289 it could crash from a null-deref. This could also affect the
290 ${addresses: } operator and ${readsock } item.
292 JH/29 Bug 2537: Fix $mime_part_count. When a single connection had a non-mime
293 message following a mime one, the variable was not reset.
295 JH/30 When an pipelined-connect fails at the first response, assume incorrect
296 cached capability (perhaps the peer reneged?) and immediately retry in
299 JH/31 Fix spurious detection of timeout while writing to transport filter.
301 JH/32 Bug 2541: Fix segfault on bad cmdline -f (sender) argument. Previously
302 an attempt to copy the string was made before checking it.
304 JH/33 Fix the dsearch lookup to return an untainted result. Previously the
305 taint of the lookup key was maintained; we now regard the presence in the
306 filesystem as sufficient validation.
308 JH/34 Fix the readsocket expansion to not segfault when an empty "options"
309 argument is supplied.
311 JH/35 The dsearch lookup now requires that the directory is an absolute path.
312 Previously this was not checked, and nonempty relative paths made an
313 access under Exim's current working directory.
315 JH/36 Bug 2554: Fix msg:defer event for the hosts_max_try_hardlimit case.
316 Previously no event was raised.
318 JH/37 Bug 2552: Fix the check on spool space during reception to use the SIZE
319 parameter supplied by the sender MAIL FROM command. Previously it was
320 ignored, and only the check_spool_space option value for the required
323 JH/38 Fix $dkim_key_length. This should, after a DKIM verification, present
324 the size of the signing public-key. Previously it was instead giving
325 the size of the signature hash.
327 JH/39 DKIM verification: the RFC 8301 restriction on sizes of RSA keys is now
328 the default. See the (new) dkim_verify_min_keysizes option.
330 JH/40 Fix a memory-handling bug: when a connection carried multiple messages
331 and an ACL use a lookup for checking either the local_part or domain,
332 stale data could be accessed. Ensure that variable references are
333 dropped between messages.
335 JH/41 Bug 2571: Fix SPA authenticator. Running as a server, an offset supplied
336 by the client was not checked as pointing within response data before
337 being used. A malicious client could thus cause an out-of-bounds read and
338 possibly gain authentication. Fix by adding the check.
340 JH/42 Internationalisation: change the default for downconversion in the smtp
341 transport to be "if needed". Previously it was "as previously set" for
342 the message, which usually meant "if needed" for message-submission but
343 "no" for everything else. However, MTAs have been seen using SMTPUTF8
344 even when the envelope addresses did not need it, resulting in forwarding
345 failures to non-supporting MTAs. A downconvert in such cases will be
346 a no-op on the addresses, merely dropping the use of SMTPUTF8 by the
347 transport. The change does mean that addresses needing conversion will
348 be converted when previously a delivery failure would occur.
350 JH/43 Fix possible long line in DSN. Previously when a very long SMTP error
351 response was received it would be used unchecked in a fail-DSN, violating
352 standards on line-length limits. Truncate if needed.
354 HS/01 Remove parameters of the link to www.open-spf.org. The linked form
355 doesn't work. (Additionally add a new main config option to configure the
362 JH/01 OpenSSL: With debug enabled output keying information sufficient, server
363 side, to decode a TLS 1.3 packet capture.
365 JH/02 OpenSSL: Suppress the sending of (stateful) TLS1.3 session tickets.
366 Previously the default library behaviour applied, sending two, each in
369 JH/03 Debug output for ACL now gives the config file name and line number for
372 JH/04 The default received_header_text now uses the RFC 8314 tls cipher clause.
374 JH/05 DKIM: ensure that dkim_domain elements are lowercased before use.
376 JH/06 Fix buggy handling of autoreply bounce_return_size_limit, and a possible
377 buffer overrun for (non-chunking) other transports.
379 JH/07 GnuTLS: Our use of late (post-handshake) certificate verification, under
380 TLS1.3, means that a server rejecting a client certificate is not visible
381 to the client until the first read of encrypted data (typically the
382 response to EHLO). Add detection for that case and treat it as a failed
383 TLS connection attempt, so that the normal retry-in-clear can work (if
384 suitably configured).
386 JB/01 Bug 2375: fix expansions of 822 addresses having comments in local-part
387 and/or domain. Found and fixed by Jason Betts.
389 JH/08 Add hardening against SRV & TLSA lookups the hit CNAMEs (a nonvalid
390 configuration). If a CNAME target was not a wellformed name pattern, a
393 JH/09 Logging: Fix initial listening-on line for multiple ports for an IP when
394 the OS reports them interleaved with other addresses.
396 JH/10 OpenSSL: Fix aggregation of messages. Previously, when PIPELINING was
397 used both for input and for a verify callout, both encrypted, SMTP
398 responses being sent by the server could be lost. This resulted in
399 dropped connections and sometimes bounces generated by a peer sending
402 JH/11 Harden plaintext authenticator against a badly misconfigured client-send
403 string. Previously it was possible to cause undefined behaviour in a
404 library routine (usually a crash). Found by "zerons".
406 JH/12 Bug 2384: fix "-bP smtp_receive_timeout". Previously it returned no
409 JH/13 Bug 2386: Fix builds with Dane under LibreSSL 2.9.0 onward. Some old
410 API was removed, so update to use the newer ones.
412 JH/14 Bug 1891: Close the log file if receiving a non-smtp message, without
413 any timeout set, is taking a long time. Previously we would hang on to a
414 rotated logfile "forever" if the input was arriving with long gaps
415 (a previous attempt to fix addressed lack, for a long time, of initial
418 HS/01 Bug 2390: Use message_id for tempfile creation to avoid races in a
419 shared (NFS) environment. The length of the tempfile name is now
420 4 + 16 ("hdr.$message_exim_id") which might break on file
421 systems which restrict the file name length to lower values.
424 HS/02 Bug 2390: Use message_id for tempfile creation to avoid races in a
425 shared (NFS) environment.
427 HS/03 Bug 2392: exigrep does case sensitive *option* processing (as it
428 did for all versions <4.90). Notably -M, -m, --invert, -I may be
431 JH/15 Use unsigned when creating bitmasks in macros, to avoid build errors
432 on some platforms for bit 31.
434 JH/16 GnuTLS: rework ciphersuite strings under recent library versions. Thanks
435 to changes apparently associated with TLS1.3 handling some of the APIs
436 previously used were either nonfunctional or inappropriate. Strings
437 like TLS1.3:ECDHE_SECP256R1__RSA_PSS_RSAE_SHA256__AES_256_GCM__AEAD:256
438 and TLS1.2:ECDHE_SECP256R1__RSA_SHA256__AES_128_CBC__SHA256:128 replace
439 the previous TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256 .
440 This affects log line X= elements, the $tls_{in,out}_cipher variables,
441 and the use of specific cipher names in the encrypted= ACL condition.
443 JH/17 OpenSSL: the default openssl_options now disables ssl_v3.
445 JH/18 GnuTLS: fix $tls_out_ocsp under hosts_request_ocsp. Previously the
446 verification result was not updated unless hosts_require_ocsp applied.
448 JH/19 Bug 2398: fix listing of a named-queue. Previously, even with the option
449 queue_list_requires_admin set to false, non-admin users were denied the
452 JH/20 Bug 2389: fix server advertising of usable certificates, under GnuTLS in
453 directory-of-certs mode. Previously they were advertised despite the
456 JH/21 The smtp transport option "hosts_noproxy_tls" is now unset by default.
457 A single TCP connection by a client will now hold a TLS connection open
458 for multiple message deliveries, by default. Previously the default was to
461 JH/22 The smtp transport option "hosts_try_dane" now enables all hosts by
462 default. If built with the facility, DANE will be used. The facility
463 SUPPORT_DANE is now enabled in the prototype build Makefile "EDITME".
465 JH/23 The build default is now for TLS to be included; the SUPPORT_TLS define
466 is replaced with DISABLE_TLS. Either USE_GNUTLS or (the new) USE_OPENSSL
467 must be defined and you must still, unless you define DISABLE_TLS, manage
468 the the include-dir and library-file requirements that go with that
469 choice. Non-TLS builds are still supported.
471 JH/24 Fix duplicated logging of peer name/address, on a transport connection-
474 JH/25 The smtp transport option "hosts_try_fastopen" now enables all hosts by
475 default. If the platform supports and has the facility enabled, it will
476 be requested on all coneections.
478 JH/26 The PIPE_CONNECT facility is promoted from experimental status and is now
479 controlled by the build-time option SUPPORT_PIPE_CONNECT.
481 PP/01 Unbreak heimdal_gssapi, broken in 4.92.
483 JH/27 Bug 2404: Use the main-section configuration option "dsn_from" for
484 success-DSN messages. Previously the From: header was always the default
485 one for these; the option was ignored.
487 JH/28 Fix the timeout on smtp response to apply to the whole response.
488 Previously it was reset for every read, so a teergrubing peer sending
489 single bytes within the time limit could extend the connection for a
490 long time. Credit to Qualsys Security Advisory Team for the discovery.
492 JH/29 Fix DSN Final-Recipient: field. Previously it was the post-routing
493 delivery address, which leaked information of the results of local
494 forwarding. Change to the original envelope recipient address, per
497 JH/30 Bug 2411: Fix DSN generation when RFC 3461 failure notification is
498 requested. Previously not bounce was generated and a log entry of
499 error ignored was made.
501 JH/31 Avoid re-expansion in ${sort } expansion. (CVE-2019-13917)
503 JH/32 Introduce a general tainting mechanism for values read from the input
504 channel, and values derived from them. Refuse to expand any tainted
505 values, to catch one form of exploit.
507 JH/33 Bug 2413: Fix dkim_strict option. Previously the expansion result
508 was unused and the unexpanded text used for the test. Found and
509 fixed by Ruben Jenster.
511 JH/34 Fix crash after TLS shutdown. When the TCP/SMTP channel was left open,
512 an attempt to use a TLS library read routine dereffed a nul pointer,
515 JH/35 Bug 2409: filter out-of-spec chars from callout response before using
516 them in our smtp response.
518 JH/36 Have the general router option retry_use_local_part default to true when
519 any of the restrictive preconditions are set (to anything). Previously it
520 was only for check_local user. The change removes one item of manual
521 configuration which is required for proper retries when a remote router
522 handles a subset of addresses for a domain.
524 JH/37 Appendfile: when evaluating quota use (non-quota_size_regex) take the file
525 link count into consideration.
527 HS/04 Fix handling of very log lines in -H files. If a -<key> <value> line
528 caused the extension of big_buffer, the following lines were ignored.
530 JH/38 Bug 1395: Teach the DNS negative-cache about TTL value from the SOA in
531 accordance with RFC 2308. Previously there was no expiry, so a longlived
532 receive process (eg. due to ACL delays) versus a short SOA value could
535 HS/05 Handle trailing backslash gracefully. (CVE-2019-15846)
537 JH/39 Promote DMARC support to mainline.
539 JH/40 Bug 2452: Add a References: header to DSNs.
541 JH/41 With GnuTLS 3.6.0 (and later) do not attempt to manage Diffie-Hellman
542 parameters. The relevant library call is documented as "Deprecated: This
543 function is unnecessary and discouraged on GnuTLS 3.6.0 or later. Since
544 3.6.0, DH parameters are negotiated following RFC7919."
546 HS/06 Change the default of dnssec_request_domains to "*"
548 JH/42 Bug 2545: Fix CHUNKING for all RCPT commands rejected. Previously we
549 carried on and emitted a BDAT command, even when PIPELINING was not
552 JH/43 Bug 2465: Fix taint-handling in dsearch lookup. Previously a nontainted
553 buffer was used for the filename, resulting in a trap when tainted
554 arguments (eg. $domain) were used.
556 JH/44 With OpenSSL 1.1.1 (onwards) disable renegotiation for TLS1.2 and below;
557 recommended to avoid a possible server-load attack. The feature can be
558 re-enabled via the openssl_options main cofiguration option.
560 JH/45 local_scan API: documented the current smtp_printf() call. This changed
561 for version 4.90 - adding a "more data" boolean to the arguments.
562 Bumped the ABI version number also, this having been missed previously;
563 release versions 4.90 to 4.92.3 inclusive were effectively broken in
564 respect of usage of smtp_printf() by either local_scan code or libraries
565 accessed via the ${dlfunc } expansion item. Both will need coding
566 adjustment for any calls to smtp_printf() to match the new function
567 signature; a FALSE value for the new argument is always safe.
569 JH/46 FreeBSD: fix use of the sendfile() syscall. The shim was not updating
570 the file-offset (which the Linux syscall does, and exim expects); this
571 resulted in an indefinite loop.
573 JH/47 ARC: fix crash in signing, triggered when a configuration error failed
574 to do ARC verification. The Authentication-Results: header line added
575 by the configuration then had no ARC item.
581 JH/01 Remove code calling the customisable local_scan function, unless a new
582 definition "HAVE_LOCAL_SCAN=yes" is present in the Local/Makefile.
584 JH/02 Bug 1007: Avoid doing logging from signal-handlers, as that can result in
585 non-signal-safe functions being used.
587 JH/03 Bug 2269: When presented with a received message having a stupidly large
588 number of DKIM-Signature headers, disable DKIM verification to avoid
589 a resource-consumption attack. The limit is set at twenty.
591 JH/04 Add variables $arc_domains, $arc_oldest_pass for ARC verify. Fix the
592 report of oldest_pass in ${authres } in consequence, and separate out
593 some descriptions of reasons for verification fail.
595 JH/05 Bug 2273: Cutthrough delivery left a window where the received messsage
596 files in the spool were present and unlocked. A queue-runner could spot
597 them, resulting in a duplicate delivery. Fix that by doing the unlock
598 after the unlink. Investigation by Tim Stewart. Take the opportunity to
599 add more error-checking on spoolfile handling while that code is being
602 PP/01 Refuse to open a spool data file (*-D) if it's a symlink.
603 No known attacks, no CVE, this is defensive hardening.
605 JH/06 Bug 2275: The MIME ACL unlocked the received message files early, and
606 a queue-runner could start a delivery while other operations were ongoing.
607 Cutthrough delivery was a common victim, resulting in duplicate delivery.
608 Found and investigated by Tim Stewart. Fix by using the open message data
609 file handle rather than opening another, and not locally closing it (which
610 releases a lock) for that case, while creating the temporary .eml format
611 file for the MIME ACL. Also applies to "regex" and "spam" ACL conditions.
613 JH/07 Bug 177: Make a random-recipient callout success visible in ACL, by setting
614 $sender_verify_failure/$recipient_verify_failure to "random".
616 JH/08 When generating a selfsigned cert, use serial number 1 since zero is not
619 JH/09 Bug 2274: Fix logging of cmdline args when starting in an unlinked cwd.
620 Previously this would segfault.
622 JH/10 Fix ARC signing for case when DKIM signing failed. Previously this would
625 JH/11 Bug 2264: Exim now only follows CNAME chains one step by default. We'd
626 like zero, since the resolver should be doing this for us, But we need one
627 as a CNAME but no MX presence gets the CNAME returned; we need to check
628 that doesn't point to an MX to declare it "no MX returned" rather than
629 "error, loop". A new main option is added so the older capability of
630 following some limited number of chain links is maintained.
632 JH/12 Add client-ip info to non-pass iprev ${authres } lines.
634 JH/13 For receent Openssl versions (1.1 onward) use modern generic protocol
635 methods. These should support TLS 1.3; they arrived with TLS 1.3 and the
636 now-deprecated earlier definitions used only specified the range up to TLS
637 1.2 (in the older-version library docs).
639 JH/14 Bug 2284: Fix DKIM signing for body lines starting with a pair of dots.
641 JH/15 Rework TLS client-side context management. Stop using a global, and
642 explicitly pass a context around. This enables future use of TLS for
643 connections to service-daemons (eg. malware scanning) while a client smtp
644 connection is using TLS; with cutthrough connections this is quite likely.
646 JH/16 Fix ARC verification to do AS checks in reverse order.
648 JH/17 Support a "tls" option on the ${readsocket } expansion item.
650 JH/18 Bug 2287: Fix the protocol name (eg utf8esmtp) for multiple messages
651 using the SMTPUTF8 option on their MAIL FROM commands, in one connection.
652 Previously the "utf8" would be re-prepended for every additional message.
654 JH/19 Reject MAIL FROM commands with SMTPUTF8 when the facility was not advertised.
655 Previously thery were accepted, resulting in issues when attempting to
656 forward messages to a non-supporting MTA.
658 PP/02 Let -n work with printing macros too, not just options.
660 JH/20 Bug 2296: Fix cutthrough for >1 address redirection. Previously only
661 one parent address was copied, and bogus data was used at delivery-logging
662 time. Either a crash (after delivery) or bogus log data could result.
663 Discovery and analysis by Tim Stewart.
665 PP/03 Make ${utf8clean:} expansion operator detect incomplete final character.
666 Previously if the string ended mid-character, we did not insert the
667 promised '?' replacement.
669 PP/04 Documentation: current string operators work on bytes, not codepoints.
671 JH/21 Change as many as possible of the global flags into one-bit bitfields; these
672 should pack well giving a smaller memory footprint so better caching and
673 therefore performance. Group the declarations where this can't be done so
674 that the byte-sized flag variables are not interspersed among pointer
675 variables, giving a better chance of good packing by the compiler.
677 JH/22 Bug 1896: Fix the envelope from for DMARC forensic reports to be possibly
678 non-null, to avoid issues with sites running BATV. Previously reports were
679 sent with an empty envelope sender so looked like bounces.
681 JH/23 Bug 2318: Fix the noerror command within filters. It wasn't working.
682 The ignore_error flag wasn't being returned from the filter subprocess so
683 was not set for later routers. Investigation and fix by Matthias Kurz.
685 JH/24 Bug 2310: Raise a msg:fail:internal event for each undelivered recipient,
686 and a msg:complete for the whole, when a message is manually removed using
687 -Mrm. Developement by Matthias Kurz, hacked on by JH.
689 JH/25 Avoid fixed-size buffers for pathnames in DB access. This required using
690 a "Gnu special" function, asprintf() in the DB utility binary builds; I
691 hope that is portable enough.
693 JH/26 Bug 2311: Fix DANE-TA verification under GnuTLS. Previously it was also
694 requiring a known-CA anchor certificate; make it now rely entirely on the
695 TLSA as an anchor. Checking the name on the leaf cert against the name
696 on the A-record for the host is still done for TA (but not for EE mode).
698 JH/27 Fix logging of proxy address. Previously, a pointless "PRX=[]:0" would be
699 included in delivery lines for non-proxied connections, when compiled with
700 SUPPORT_SOCKS and running with proxy logging enabled.
702 JH/28 Bug 2314: Fire msg:fail:delivery event even when error is being ignored.
703 Developement by Matthias Kurz, tweaked by JH. While in that bit of code,
704 move the existing event to fire before the normal logging of message
705 failure so that custom logging is bracketed by normal logging.
707 JH/29 Bug 2322: A "fail" command in a non-system filter (file) now fires the
708 msg:fail:internal event. Developement by Matthias Kurz.
710 JH/30 Bug 2329: Increase buffer size used for dns lookup from 2k, which was
711 far too small for todays use of crypto signatures stored there. Go all
712 the way to the max DNS message size of 64kB, even though this might be
713 overmuch for IOT constrained device use.
715 JH/31 Fix a bad use of a copy function, which could be used to pointlessly
716 copy a string over itself. The library routine is documented as not
717 supporting overlapping copies, and on MacOS it actually raised a SIGABRT.
719 JH/32 For main options check_spool_space and check_inode_space, where the
720 platform supports 64b integers, support more than the previous 2^31 kB
721 (i.e. more than 2 TB). Accept E, P and T multipliers in addition to
722 the previous G, M, k.
724 JH/33 Bug 2338: Fix the cyrus-sasl authenticator to fill in the
725 $authenticated_fail_id variable on authentication failure. Previously
728 JH/34 Increase RSA keysize of autogen selfsign cert from 1024 to 2048. RHEL 8.0
729 OpenSSL didn't want to use such a weak key. Do for GnuTLS also, and for
730 more-modern GnuTLS move from GNUTLS_SEC_PARAM_LOW to
731 GNUTLS_SEC_PARAM_MEDIUM.
733 JH/35 OpenSSL: fail the handshake when SNI processing hits a problem, server
734 side. Previously we would continue as if no SNI had been received.
736 JH/36 Harden the handling of string-lists. When a list consisted of a sole
737 "<" character, which should be a list-separator specification, we walked
738 off past the nul-terimation.
740 JH/37 Bug 2341: Send "message delayed" warning MDNs (restricted to external
741 causes) even when the retry time is not yet met. Previously they were
742 not, meaning that when (say) an account was over-quota and temp-rejecting,
743 and multiple senders' messages were queued, only one sender would get
744 notified on each configured delay_warning cycle.
746 JH/38 Bug 2351: Log failures to extract envelope addresses from message headers.
748 JH/39 OpenSSL: clear the error stack after an SSL_accept(). With anon-auth
749 cipher-suites, an error can be left on the stack even for a succeeding
750 accept; this results in impossible error messages when a later operation
753 AM/01 Bug 2359: GnuTLS: repeat lowlevel read and write operations while they
754 return error codes indicating retry. Under TLS1.3 this becomes required.
756 JH/40 Fix the feature-cache refresh for EXPERIMENTAL_PIPE_CONNECT. Previously
757 it only wrote the new authenticators, resulting in a lack of tracking of
758 peer changes of ESMTP extensions until the next cache flush.
760 JH/41 Fix the loop reading a message header line to check for integer overflow,
761 and more-often against header_maxsize. Previously a crafted message could
762 induce a crash of the recive process; now the message is cleanly rejected.
764 JH/42 Bug 2366: Fix the behaviour of the dkim_verify_signers option. It had
765 been totally disabled for all of 4.91. Discovery and fix by "Mad Alex".
771 GF/01 DEFER rather than ERROR on redis cluster MOVED response.
772 When redis_servers is set to a list of > 1 element, and the Redis servers
773 in that list are in cluster configuration, convert the REDIS_REPLY_ERROR
774 case of MOVED into a DEFER case instead, thus moving the query onto the
775 next server in the list. For a cluster of N elements, all N servers must
776 be defined in redis_servers.
778 GF/02 Catch and remove uninitialized value warning in exiqsumm
779 Check for existence of @ARGV before looking at $ARGV[0]
781 JH/01 Replace the store_release() internal interface with store_newblock(),
782 which internalises the check required to safely use the old one, plus
783 the allocate and data copy operations duplicated in both (!) of the
784 extant use locations.
786 JH/02 Disallow '/' characters in queue names specified for the "queue=" ACL
787 modifier. This matches the restriction on the commandline.
789 JH/03 Fix pgsql lookup for multiple result-tuples with a single column.
790 Previously only the last row was returned.
792 JH/04 Bug 2217: Tighten up the parsing of DKIM signature headers. Previously
793 we assumed that tags in the header were well-formed, and parsed the
794 element content after inspecting only the first char of the tag.
795 Assumptions at that stage could crash the receive process on malformed
798 JH/05 Bug 2215: Fix crash associated with dnsdb lookup done from DKIM ACL.
799 While running the DKIM ACL we operate on the Permanent memory pool so that
800 variables created with "set" persist to the DATA ACL. Also (at any time)
801 DNS lookups that fail create cache records using the Permanent pool. But
802 expansions release any allocations made on the current pool - so a dnsdb
803 lookup expansion done in the DKIM ACL releases the memory used for the
804 DNS negative-cache, and bad things result. Solution is to switch to the
805 Main pool for expansions.
806 While we're in that code, add checks on the DNS cache during store_reset,
807 active in the testsuite.
808 Problem spotted, and debugging aided, by Wolfgang Breyha.
810 JH/06 Fix issue with continued-connections when the DNS shifts unreliably.
811 When none of the hosts presented to a transport match an already-open
812 connection, close it and proceed with the list. Previously we would
813 queue the message. Spotted by Lena with Yahoo, probably involving
816 JH/07 Bug 2214: Fix SMTP responses resulting from non-accept result of MIME ACL.
817 Previously a spurious "250 OK id=" response was appended to the proper
820 JH/08 The "support for" informational output now, which built with Content
821 Scanning support, has a line for the malware scanner interfaces compiled
822 in. Interface can be individually included or not at build time.
824 JH/09 The "aveserver", "kavdaemon" and "mksd" interfaces are now not included
825 by the template makefile "src/EDITME". The "STREAM" support for an older
826 ClamAV interface method is removed.
828 JH/10 Bug 2223: Fix mysql lookup returns for the no-data case (when the number of
829 rows affected is given instead).
831 JH/11 The runtime Berkeley DB library version is now additionally output by
832 "exim -d -bV". Previously only the compile-time version was shown.
834 JH/12 Bug 2230: Fix cutthrough routing for nonfirst messages in an initiating
835 SMTP connection. Previously, when one had more recipients than the
836 first, an abortive onward connection was made. Move to full support for
837 multiple onward connections in sequence, handling cutthrough connection
838 for all multi-message initiating connections.
840 JH/13 Bug 2229: Fix cutthrough routing for nonstandard port numbers defined by
841 routers. Previously, a multi-recipient message would fail to match the
842 onward-connection opened for the first recipient, and cause its closure.
844 JH/14 Bug 2174: A timeout on connect for a callout was also erroneously seen as
845 a timeout on read on a GnuTLS initiating connection, resulting in the
846 initiating connection being dropped. This mattered most when the callout
847 was marked defer_ok. Fix to keep the two timeout-detection methods
850 JH/15 Relax results from ACL control request to enable cutthrough, in
851 unsupported situations, from error to silently (except under debug)
852 ignoring. This covers use with PRDR, frozen messages, queue-only and
855 HS/01 Fix Buffer overflow in base64d() (CVE-2018-6789)
857 JH/16 Fix bug in DKIM verify: a buffer overflow could corrupt the malloc
858 metadata, resulting in a crash in free().
860 PP/01 Fix broken Heimdal GSSAPI authenticator integration.
861 Broken in f2ed27cf5, missing an equals sign for specified-initialisers.
862 Broken also in d185889f4, with init system revamp.
864 JH/17 Bug 2113: Fix conversation closedown with the Avast malware scanner.
865 Previously we abruptly closed the connection after reading a malware-
866 found indication; now we go on to read the "scan ok" response line,
869 JH/18 Bug 2239: Enforce non-usability of control=utf8_downconvert in the mail
870 ACL. Previously, a crash would result.
872 JH/19 Speed up macro lookups during configuration file read, by skipping non-
873 macro text after a replacement (previously it was only once per line) and
874 by skipping builtin macros when searching for an uppercase lead character.
876 JH/20 DANE support moved from Experimental to mainline. The Makefile control
877 for the build is renamed.
879 JH/21 Fix memory leak during multi-message connections using STARTTLS. A buffer
880 was allocated for every new TLS startup, meaning one per message. Fix
881 by only allocating once (OpenSSL) or freeing on TLS-close (GnuTLS).
883 JH/22 Bug 2236: When a DKIM verification result is overridden by ACL, DMARC
884 reported the original. Fix to report (as far as possible) the ACL
885 result replacing the original.
887 JH/23 Fix memory leak during multi-message connections using STARTTLS under
888 OpenSSL. Certificate information is loaded for every new TLS startup,
889 and the resources needed to be freed.
891 JH/24 Bug 2242: Fix exim_dbmbuild to permit directoryless filenames.
893 JH/25 Fix utf8_downconvert propagation through a redirect router. Previously it
896 JH/26 Bug 2253: For logging delivery lines under PRDR, append the overall
897 DATA response info to the (existing) per-recipient response info for
898 the "C=" log element. It can have useful tracking info from the
899 destination system. Patch from Simon Arlott.
901 JH/27 Bug 2251: Fix ldap lookups that return a single attribute having zero-
902 length value. Previously this would segfault.
904 HS/02 Support Avast multiline protoocol, this allows passing flags to
905 newer versions of the scanner.
907 JH/28 Ensure that variables possibly set during message acceptance are marked
908 dead before release of memory in the daemon loop. This stops complaints
909 about them when the debug_store option is enabled. Discovered specifically
910 for sender_rate_period, but applies to a whole set of variables.
911 Do the same for the queue-runner and queue-list loops, for variables set
912 from spool message files. Do the same for the SMTP per-message loop, for
913 certain variables indirectly set in ACL operations.
915 JH/29 Bug 2250: Fix a longstanding bug in heavily-pipelined SMTP input (such
916 as a multi-recipient message from a mailinglist manager). The coding had
917 an arbitrary cutoff number of characters while checking for more input;
918 enforced by writing a NUL into the buffer. This corrupted long / fast
919 input. The problem was exposed more widely when more pipelineing of SMTP
920 responses was introduced, and one Exim system was feeding another.
921 The symptom is log complaints of SMTP syntax error (NUL chars) on the
922 receiving system, and refused recipients seen by the sending system
923 (propating to people being dropped from mailing lists).
924 Discovered and pinpointed by David Carter.
926 JH/30 The (EXPERIMENTAL_DMARC) variable $dmarc_ar_header is withdrawn, being
927 replaced by the ${authresults } expansion.
929 JH/31 Bug 2257: Fix pipe transport to not use a socket-only syscall.
931 HS/03 Set a handler for SIGTERM and call exit(3) if running as PID 1. This
932 allows proper process termination in container environments.
934 JH/32 Bug 2258: Fix spool_wireformat in combination with LMTP transport.
935 Previously the "final dot" had a newline after it; ensure it is CR,LF.
937 JH/33 SPF: remove support for the "spf" ACL condition outcome values "err_temp"
938 and "err_perm", deprecated since 4.83 when the RFC-defined words
939 "temperror" and "permerror" were introduced.
941 JH/34 Re-introduce enforcement of no cutthrough delivery on transports having
942 transport-filters or DKIM-signing. The restriction was lost in the
943 consolidation of verify-callout and delivery SMTP handling.
944 Extend the restriction to also cover ARC-signing.
946 JH/35 Cutthrough: for a final-dot response timeout (and nonunderstood responses)
947 in defer=pass mode supply a 450 to the initiator. Previously the message
950 PP/02 DANE: add dane_require_tls_ciphers SMTP Transport option; if unset,
951 tls_require_ciphers is used as before.
953 HS/03 Malware Avast: Better match the Avast multiline protocol. Add
954 "pass_unscanned". Only tmpfails from the scanner are written to
955 the paniclog, as they may require admin intervention (permission
956 denied, license issues). Other scanner errors (like decompression
957 bombs) do not cause a paniclog entry.
959 JH/36 Fix reinitialisation of DKIM logging variable between messages.
960 Previously it was possible to log spurious information in receive log
963 JH/37 Bug 2255: Revert the disable of the OpenSSL session caching. This
964 triggered odd behaviour from Outlook Express clients.
966 PP/03 Add util/renew-opendmarc-tlds.sh script for safe renewal of public
969 JH/38 DKIM: accept Ed25519 pubkeys in SubjectPublicKeyInfo-wrapped form,
970 since the IETF WG has not yet settled on that versus the original
971 "bare" representation.
973 JH/39 Fix syslog logging for syslog_timestamp=no and log_selector +millisec.
974 Previously the millisecond value corrupted the output.
975 Fix also for syslog_pid=no and log_selector +pid, for which the pid
976 corrupted the output.
982 JH/01 Rework error string handling in TLS interface so that the caller in
983 more cases is responsible for logging. This permits library-sourced
984 string to be attached to addresses during delivery, and collapses
985 pairs of long lines into single ones.
987 PP/01 Allow PKG_CONFIG_PATH to be set in Local/Makefile and use it correctly
988 during configuration. Wildcards are allowed and expanded.
990 JH/02 Rework error string handling in DKIM to pass more info back to callers.
991 This permits better logging.
993 JH/03 Rework the transport continued-connection mechanism: when TLS is active,
994 do not close it down and have the child transport start it up again on
995 the passed-on TCP connection. Instead, proxy the child (and any
996 subsequent ones) for TLS via a unix-domain socket channel. Logging is
997 affected: the continued delivery log lines do not have any DNSSEC, TLS
998 Certificate or OCSP information. TLS cipher information is still logged.
1000 JH/04 Shorten the log line for daemon startup by collapsing adjacent sets of
1001 identical IP addresses on different listening ports. Will also affect
1004 PP/02 Bug 2070: uClibc defines __GLIBC__ without providing glibc headers;
1005 add noisy ifdef guards to special-case this sillyness.
1006 Patch from Bernd Kuhls.
1008 JH/05 Tighten up the checking in isip4 (et al): dotted-quad components larger
1009 than 255 are no longer allowed.
1011 JH/06 Default openssl_options to include +no_ticket, to reduce load on peers.
1012 Disable the session-cache too, which might reduce our load. Since we
1013 currrectly use a new context for every connection, both as server and
1014 client, there is no benefit for these.
1015 GnuTLS appears to not support tickets server-side by default (we don't
1016 call gnutls_session_ticket_enable_server()) but client side is enabled
1017 by default on recent versions (3.1.3 +) unless the PFS priority string
1020 PP/03 Add $SOURCE_DATE_EPOCH support for reproducible builds, per spec at
1021 <https://reproducible-builds.org/specs/source-date-epoch/>.
1023 JH/07 Fix smtp transport use of limited max_rcpt under mua_wrapper. Previously
1024 the check for any unsuccessful recipients did not notice the limit, and
1025 erroneously found still-pending ones.
1027 JH/08 Pipeline CHUNKING command and data together, on kernels that support
1028 MSG_MORE. Only in-clear (not on TLS connections).
1030 JH/09 Avoid using a temporary file during transport using dkim. Unless a
1031 transport-filter is involved we can buffer the headers in memory for
1032 creating the signature, and read the spool data file once for the
1033 signature and again for transmission.
1035 JH/10 Enable use of sendfile in Linux builds as default. It was disabled in
1036 4.77 as the kernel support then wasn't solid, having issues in 64bit
1037 mode. Now, it's been long enough. Add support for FreeBSD also.
1039 JH/11 Bug 2104: Fix continued use of a transport connection with TLS. In the
1040 case where the routing stage had gathered several addresses to send to
1041 a host before calling the transport for the first, we previously failed
1042 to close down TLS in the old transport process before passing the TCP
1043 connection to the new process. The new one sent a STARTTLS command
1044 which naturally failed, giving a failed delivery and bloating the retry
1045 database. Investigation and fix prototype from Wolfgang Breyha.
1047 JH/12 Fix check on SMTP command input synchronisation. Previously there were
1048 false-negatives in the check that the sender had not preempted a response
1049 or prompt from Exim (running as a server), due to that code's lack of
1050 awareness of the SMTP input buffering.
1052 PP/04 Add commandline_checks_require_admin option.
1053 Exim drops privileges sanely, various checks such as -be aren't a
1054 security problem, as long as you trust local users with access to their
1055 own account. When invoked by services which pass untrusted data to
1056 Exim, this might be an issue. Set this option in main configuration
1057 AND make fixes to the calling application, such as using `--` to stop
1060 JH/13 Do pipelining under TLS. Previously, although safe, no advantage was
1061 taken. Now take care to pack both (client) MAIL,RCPT,DATA, and (server)
1062 responses to those, into a single TLS record each way (this usually means
1063 a single packet). As a side issue, smtp_enforce_sync now works on TLS
1066 PP/05 OpenSSL/1.1: use DH_bits() for more accurate DH param sizes. This
1067 affects you only if you're dancing at the edge of the param size limits.
1068 If you are, and this message makes sense to you, then: raise the
1069 configured limit or use OpenSSL 1.1. Nothing we can do for older
1072 JH/14 For the "sock" variant of the malware scanner interface, accept an empty
1073 cmdline element to get the documented default one. Previously it was
1076 JH/15 Fix a crash in the smtp transport caused when two hosts in succession
1077 are unsuable for non-message-specific reasons - eg. connection timeout,
1078 banner-time rejection.
1080 JH/16 Fix logging of delivery remote port, when specified by router, under
1083 PP/06 Repair manualroute's ability to take options in any order, even if one
1084 is the name of a transport.
1087 HS/01 Cleanup, prevent repeated use of -p/-oMr (CVE-2017-1000369)
1089 JH/17 Change the list-building routines interface to use the expanding-string
1090 triplet model, for better allocation and copying behaviour.
1092 JH/18 Prebuild the data-structure for "builtin" macros, for faster startup.
1093 Previously it was constructed the first time a possibly-matching string
1094 was met in the configuration file input during startup; now it is done
1097 JH/19 Bug 2141: Use the full-complex API for Berkeley DB rather than the legacy-
1098 compatible one, to avoid the (poorly documented) possibility of a config
1099 file in the working directory redirecting the DB files, possibly correpting
1100 some existing file. CVE-2017-10140 assigned for BDB.
1102 JH/20 Bug 2147: Do not defer for a verify-with-callout-and-random which is not
1103 cache-hot. Previously, although the result was properly cached, the
1104 initial verify call returned a defer.
1106 JH/21 Bug 2151: Avoid using SIZE on the MAIL for a callout verify, on any but
1107 the main verify for receipient in uncached-mode.
1109 JH/22 Retire historical build files to an "unsupported" subdir. These are
1110 defined as "ones for which we have no current evidence of testing".
1112 JH/23 DKIM: enforce the DNS pubkey record "h" permitted-hashes optional field,
1113 if present. Previously it was ignored.
1115 JH/24 Start using specified-initialisers in C structure init coding. This is
1116 a C99 feature (it's 2017, so now considered safe).
1118 JH/25 Use one-bit bitfields for flags in the "addr" data structure. Previously
1119 if was a fixed-sized field and bitmask ops via macros; it is now more
1122 PP/07 GitHub PR 56: Apply MariaDB build fix.
1123 Patch provided by Jaroslav Škarvada.
1125 PP/08 Bug 2161: Fix regression in sieve quoted-printable handling introduced
1126 during Coverity cleanups [4.87 JH/47]
1127 Diagnosis and fix provided by Michael Fischer v. Mollard.
1129 JH/26 Fix DKIM bug: when the pseudoheader generated for signing was exactly
1130 the right size to place the terminating semicolon on its own folded
1131 line, the header hash was calculated to an incorrect value thanks to
1132 the (relaxed) space the fold became.
1134 HS/02 Fix Bug 2130: large writes from the transport subprocess were chunked
1135 and confused the parent.
1137 JH/27 Fix SOCKS bug: an unitialized pointer was deref'd by the transport process
1138 which could crash as a result. This could lead to undeliverable messages.
1140 JH/28 Logging: "next input sent too soon" now shows where input was truncated
1143 JH/29 Fix queue_run_in_order to ignore the PID portion of the message ID. This
1144 matters on fast-turnover and PID-randomising systems, which were getting
1145 out-of-order delivery.
1147 JH/30 Fix a logging bug on aarch64: an unsafe routine was previously used for
1148 a possibly-overlapping copy. The symptom was that "Remote host closed
1149 connection in response to HELO" was logged instead of the actual 4xx
1152 JH/31 Fix CHUNKING code to properly flush the unwanted chunk after an error.
1153 Previously only that bufferd was discarded, resulting in SYMTP command
1156 JH/32 DKIM: when a message has multiple signatures matching an identity given
1157 in dkim_verify_signers, run the dkim acl once for each. Previously only
1158 one run was done. Bug 2189.
1160 JH/33 Downgrade an unfound-list name (usually a typo in the config file) from
1161 "panic the current process" to "deliberately defer". The panic log is
1162 still written with the problem list name; the mail and reject logs now
1163 get a temp-reject line for the message that was being handled, saying
1164 something like "domains check lookup or other defer". The SMTP 451
1165 message is still "Temporary local problem".
1167 JH/34 Bug 2199: Fix a use-after-free while reading smtp input for header lines.
1168 A crafted sequence of BDAT commands could result in in-use memory beeing
1169 freed. CVE-2017-16943.
1171 HS/03 Bug 2201: Fix checking for leading-dot on a line during headers reading
1172 from SMTP input. Previously it was always done; now only done for DATA
1173 and not BDAT commands. CVE-2017-16944.
1175 JH/35 Bug 2201: Flush received data in BDAT mode after detecting an error fatal
1176 to the message (such as an overlong header line). Previously this was
1177 not done and we did not exit BDAT mode. Followon from the previous item
1178 though a different problem.
1184 JH/01 Bug 1922: Support IDNA2008. This has slightly different conversion rules
1185 than -2003 did; needs libidn2 in addition to libidn.
1187 JH/02 The path option on a pipe transport is now expanded before use.
1189 PP/01 GitHub PR 50: Do not call ldap_start_tls_s on ldapi:// connections.
1190 Patch provided by "Björn", documentation fix added too.
1192 JH/03 Bug 2003: fix Proxy Protocol v2 handling: the address size field was
1193 missing a wire-to-host endian conversion.
1195 JH/04 Bug 2004: fix CHUNKING in non-PIPELINEING mode. Chunk data following
1196 close after a BDAT command line could be taken as a following command,
1197 giving a synch failure. Fix by only checking for synch immediately
1198 before acknowledging the chunk.
1200 PP/02 GitHub PR 52: many spelling fixes, which include fixing parsing of
1201 no_require_dnssec option and creation of _HAVE_TRANSPORT_APPEND_MAILDIR
1202 macro. Patches provided by Josh Soref.
1204 JH/05 Have the EHLO response advertise VRFY, if there is a vrfy ACL defined.
1205 Previously we did not; the RFC seems ambiguous and VRFY is not listed
1206 by IANA as a service extension. However, John Klensin suggests that we
1209 JH/06 Bug 2017: Fix DKIM verification in -bh test mode. The data feed into
1210 the dkim code may be unix-mode line endings rather than smtp wire-format
1211 CRLF, so prepend a CR to any bare LF.
1213 JH/07 Rationalise the coding for callout smtp conversations and transport ones.
1214 As a side-benfit, callouts can now use PIPELINING hence fewer round-trips.
1216 JH/08 Bug 2016: Fix DKIM verification vs. CHUNKING. Any BDAT commands after
1217 the first were themselves being wrongly included in the feed into dkim
1218 processing; with most chunk sizes in use this resulted in an incorrect
1219 body hash calculated value.
1221 JH/09 Bug 2014: permit inclusion of a DKIM-Signature header in a received
1222 DKIM signature block, for verification. Although advised against by
1223 standards it is specifically not ruled illegal.
1225 JH/10 Bug 2025: Fix reception of (quoted) local-parts with embedded spaces.
1227 JH/11 Bug 2029: Fix crash in DKIM verification when a message signature block is
1228 missing a body hash (the bh= tag).
1230 JH/12 Bug 2018: Re-order Proxy Protocol startup versus TLS-on-connect startup.
1231 It seems that HAProxy sends the Proxy Protocol information in clear and
1232 only then does a TLS startup, so do the same.
1234 JH/13 Bug 2027: Avoid attempting to use TCP Fast Open for non-transport client
1235 TCP connections (such as for Spamd) unless the daemon successfully set
1236 Fast Open mode on its listening sockets. This fixes breakage seen on
1237 too-old kernels or those not configured for Fast Open, at the cost of
1238 requiring both directions being enabled for TFO, and TFO never being used
1239 by non-daemon-related Exim processes.
1241 JH/14 Bug 2000: Reject messages recieved with CHUNKING but with malformed line
1242 endings, at least on the first header line. Try to canonify any that get
1243 past that check, despite the cost.
1245 JH/15 Angle-bracket nesting (an error inserted by broken sendmails) levels are
1246 now limited to an arbitrary five deep, while parsing addresses with the
1247 strip_excess_angle_brackets option enabled.
1249 PP/03 Bug 2018: For Proxy Protocol and TLS-on-connect, do not over-read and
1250 instead leave the unprompted TLS handshake in socket buffer for the
1251 TLS library to consume.
1253 PP/04 Bug 2018: Also handle Proxy Protocol v2 safely.
1255 PP/05 FreeBSD compat: handle that Ports no longer create /usr/bin/perl
1257 JH/16 Drop variables when they go out of scope. Memory management drops a whole
1258 region in one operation, for speed, and this leaves assigned pointers
1259 dangling. Add checks run only under the testsuite which checks all
1260 variables at a store-reset and panics on a dangling pointer; add code
1261 explicitly nulling out all the variables discovered. Fixes one known
1262 bug: a transport crash, where a dangling pointer for $sending_ip_address
1263 originally assigned in a verify callout, is re-used.
1265 PP/06 Drop '.' from @INC in various Perl scripts.
1267 PP/07 Switch FreeBSD iconv to always use the base-system libc functions.
1269 PP/08 Reduce a number of compilation warnings under clang; building with
1270 CC=clang CFLAGS+=-Wno-dangling-else -Wno-logical-op-parentheses
1271 should be warning-free.
1273 JH/17 Fix inbound CHUNKING when DKIM disabled at runtime.
1275 HS/01 Fix portability problems introduced by PP/08 for platforms where
1276 realloc(NULL) is not equivalent to malloc() [SunOS et al].
1278 HS/02 Bug 1974: Fix missing line terminator on the last received BDAT
1279 chunk. This allows us to accept broken chunked messages. We need a more
1280 general solution here.
1282 PP/09 Wrote util/chunking_fixqueue_finalnewlines.pl to help recover
1283 already-broken messages in the queue.
1285 JH/18 Bug 2061: Fix ${extract } corrupting an enclosing ${reduce } $value.
1287 JH/19 Fix reference counting bug in routing-generated-address tracking.
1293 JH/01 Use SIZE on MAIL FROM in a cutthrough connection, if the destination
1294 supports it and a size is available (ie. the sending peer gave us one).
1296 JH/02 The obsolete acl condition "demime" is removed (finally, after ten
1297 years of being deprecated). The replacements are the ACLs
1298 acl_smtp_mime and acl_not_smtp_mime.
1300 JH/03 Upgrade security requirements imposed for hosts_try_dane: previously
1301 a downgraded non-dane trust-anchor for the TLS connection (CA-style)
1302 or even an in-clear connection were permitted. Now, if the host lookup
1303 was dnssec and dane was requested then the host is only used if the
1304 TLSA lookup succeeds and is dnssec. Further hosts (eg. lower priority
1305 MXs) will be tried (for hosts_try_dane though not for hosts_require_dane)
1306 if one fails this test.
1307 This means that a poorly-configured remote DNS will make it incommunicado;
1308 but it protects against a DNS-interception attack on it.
1310 JH/04 Bug 1810: make continued-use of an open smtp transport connection
1311 non-noisy when a race steals the message being considered.
1313 JH/05 If main configuration option tls_certificate is unset, generate a
1314 self-signed certificate for inbound TLS connections.
1316 JH/06 Bug 165: hide more cases of password exposure - this time in expansions
1317 in rewrites and routers.
1319 JH/07 Retire gnutls_require_mac et.al. These were nonfunctional since 4.80
1320 and logged a warning sing 4.83; now they are a configuration file error.
1322 JH/08 Bug 1836: Fix crash in VRFY handling when handed an unqualified name
1323 (lacking @domain). Apply the same qualification processing as RCPT.
1325 JH/09 Bug 1804: Avoid writing msglog files when in -bh or -bhc mode.
1327 JH/10 Support ${sha256:} applied to a string (as well as the previous
1330 JH/11 Cutthrough: avoid using the callout hints db on a verify callout when
1331 a cutthrough deliver is pending, as we always want to make a connection.
1332 This also avoids re-routing the message when later placing the cutthrough
1333 connection after a verify cache hit.
1334 Do not update it with the verify result either.
1336 JH/12 Cutthrough: disable when verify option success_on_redirect is used, and
1337 when routing results in more than one destination address.
1339 JH/13 Cutthrough: expand transport dkim_domain option when testing for dkim
1340 signing (which inhibits the cutthrough capability). Previously only
1341 the presence of an option was tested; now an expansion evaluating as
1342 empty is permissible (obviously it should depend only on data available
1343 when the cutthrough connection is made).
1345 JH/14 Fix logging of errors under PIPELINING. Previously the log line giving
1346 the relevant preceding SMTP command did not note the pipelining mode.
1348 JH/15 Fix counting of empty lines in $body_linecount and $message_linecount.
1349 Previously they were not counted.
1351 JH/16 DANE: treat a TLSA lookup response having all non-TLSA RRs, the same
1352 as one having no matching records. Previously we deferred the message
1353 that needed the lookup.
1355 JH/17 Fakereject: previously logged as a normal message arrival "<="; now
1356 distinguished as "(=".
1358 JH/18 Bug 1867: make the fail_defer_domains option on a dnslookup router work
1359 for missing MX records. Previously it only worked for missing A records.
1361 JH/19 Bug 1850: support Radius libraries that return REJECT_RC.
1363 JH/20 Bug 1872: Ensure that acl_smtp_notquit is run when the connection drops
1364 after the data-go-ahead and data-ack. Patch from Jason Betts.
1366 JH/21 Bug 1846: Send DMARC forensic reports for reject and quarantine results,
1367 even for a "none" policy. Patch from Tony Meyer.
1369 JH/22 Fix continued use of a connection for further deliveries. If a port was
1370 specified by a router, it must also match for the delivery to be
1373 JH/23 Bug 1874: fix continued use of a connection for further deliveries.
1374 When one of the recipients of a message was unsuitable for the connection
1375 (has no matching addresses), we lost track of needing to mark it
1376 deferred. As a result mail would be lost.
1378 JH/24 Bug 1832: Log EHLO response on getting conn-close response for HELO.
1380 JH/25 Decoding ACL controls is now done using a binary search; the source code
1381 takes up less space and should be simpler to maintain. Merge the ACL
1382 condition decode tables also, with similar effect.
1384 JH/26 Fix problem with one_time used on a redirect router which returned the
1385 parent address unchanged. A retry would see the parent address marked as
1386 delivered, so not attempt the (identical) child. As a result mail would
1389 JH/27 Fix a possible security hole, wherein a process operating with the Exim
1390 UID can gain a root shell. Credit to http://www.halfdog.net/ for
1391 discovery and writeup. Ubuntu bug 1580454; no bug raised against Exim
1394 JH/28 Enable {spool,log} filesystem space and inode checks as default.
1395 Main config options check_{log,spool}_{inodes,space} are now
1396 100 inodes, 10MB unless set otherwise in the configuration.
1398 JH/29 Fix the connection_reject log selector to apply to the connect ACL.
1399 Previously it only applied to the main-section connection policy
1402 JH/30 Bug 1897: fix callouts connection fallback from TLS to cleartext.
1404 PP/01 Changed default Diffie-Hellman parameters to be Exim-specific, created
1405 by me. Added RFC7919 DH primes as an alternative.
1407 PP/02 Unbreak build via pkg-config with new hash support when crypto headers
1408 are not in the system include path.
1410 JH/31 Fix longstanding bug with aborted TLS server connection handling. Under
1411 GnuTLS, when a session startup failed (eg because the client disconnected)
1412 Exim did stdio operations after fclose. This was exposed by a recent
1413 change which nulled out the file handle after the fclose.
1415 JH/32 Bug 1909: Fix OCSP proof verification for cases where the proof is
1416 signed directly by the cert-signing cert, rather than an intermediate
1417 OCSP-signing cert. This is the model used by LetsEncrypt.
1419 JH/33 Bug 1914: Ensure socket is nonblocking before draining after SMTP QUIT.
1421 HS/01 Fix leak in verify callout under GnuTLS, about 3MB per recipient on
1422 an incoming connection.
1424 HS/02 Bug 1802: Do not half-close the connection after sending a request
1427 HS/03 Use "auto" as the default EC curve parameter. For OpenSSL < 1.0.2
1428 fallback to "prime256v1".
1430 JH/34 SECURITY: Use proper copy of DATA command in error message.
1431 Could leak key material. Remotely exploitable. CVE-2016-9963.
1437 JH/01 Bug 1664: Disable OCSP for GnuTLS library versions at/before 3.3.16
1438 and 3.4.4 - once the server is enabled to respond to an OCSP request
1439 it does even when not requested, resulting in a stapling non-aware
1440 client dropping the TLS connection.
1442 TF/01 Code cleanup: Overhaul the debug_selector and log_selector machinery to
1443 support variable-length bit vectors. No functional change.
1445 TF/02 Improve the consistency of logging incoming and outgoing interfaces.
1446 The I= interface field on outgoing lines is now after the H= remote
1447 host field, same as incoming lines. There is a separate
1448 outgoing_interface log selector which allows you to disable the
1451 JH/02 Bug 728: Close logfiles after a daemon-process "exceptional" log write.
1452 If not running log_selector +smtp_connection the mainlog would be held
1453 open indefinitely after a "too many connections" event, including to a
1454 deleted file after a log rotate. Leave the per net connection logging
1455 leaving it open for efficiency as that will be quickly detected by the
1456 check on the next write.
1458 HS/01 Bug 1671: Fix post transport crash.
1459 Processing the wait-<transport> messages could crash the delivery
1460 process if the message IDs didn't exist for some reason. When
1461 using 'split_spool_directory=yes' the construction of the spool
1462 file name failed already, exposing the same netto behaviour.
1464 JH/03 Bug 425: Capture substrings in $regex1, $regex2 etc from regex &
1465 mime_regex ACL conditions.
1467 JH/04 Bug 1686: When compiled with EXPERIMENTAL_DSN_INFO: Add extra information
1468 to DSN fail messages (bounces): remote IP, remote greeting, remote response
1469 to HELO, local diagnostic string.
1471 JH/05 Downgrade message for a TLS-certificate-based authentication fail from
1472 log line to debug. Even when configured with a tls authenticator many
1473 client connections are expected to not authenticate in this way, so
1474 an authenticate fail is not an error.
1476 HS/02 Add the Exim version string to the process info. This way exiwhat
1477 gives some more detail about the running daemon.
1479 JH/06 Bug 1395: time-limit caching of DNS lookups, to the TTL value. This may
1480 matter for fast-change records such as DNSBLs.
1482 JH/07 Bug 1678: Always record an interface option value, if set, as part of a
1483 retry record, even if constant. There may be multiple transports with
1484 different interface settings and the retry behaviour needs to be kept
1487 JH/08 Bug 1586: exiqgrep now refuses to run if there are unexpected arguments.
1489 JH/09 Bug 1700: ignore space & tab embedded in base64 during decode.
1491 JH/10 Bug 840: fix log_defer_output option of pipe transport
1493 JH/11 Bug 830: use same host for all RCPTS of a message, even under
1494 hosts_randomize. This matters a lot when combined with mua_wrapper.
1496 JH/12 Bug 1706: percent and underbar characters are no longer escaped by the
1497 ${quote_pgsql:<string>} operator.
1499 JH/13 Bug 1708: avoid misaligned access in cached lookup.
1501 JH/14 Change header file name for freeradius-client. Relevant if compiling
1502 with Radius support; from the Gentoo tree and checked under Fedora.
1504 JH/15 Bug 1712: Introduce $prdr_requested flag variable
1506 JH/16 Bug 1714: Permit an empty string as expansion result for transport
1507 option transport_filter, meaning no filtering.
1509 JH/17 Bug 1713: Fix non-PDKIM_DEBUG build. Patch from Jasen Betts.
1511 JH/18 Bug 1709: When built with TLS support, the tls_advertise_hosts option now
1512 defaults to "*" (all hosts). The variable is now available when not built
1513 with TLS, default unset, mainly to enable keeping the testsuite sane.
1514 If a server certificate is not supplied (via tls_certificate) an error is
1515 logged, and clients will find TLS connections fail on startup. Presumably
1516 they will retry in-clear.
1517 Packagers of Exim are strongly encouraged to create a server certificate
1518 at installation time.
1520 HS/03 Add -bP config_file as a synonym for -bP configure_file, for consistency
1521 with the $config_file variable.
1523 JH/19 Two additional event types: msg:rcpt:defer and msg:rcpt:host:defer. Both
1524 in transport context, after the attempt, and per-recipient. The latter type
1525 is per host attempted. The event data is the error message, and the errno
1526 information encodes the lookup type (A vs. MX) used for the (first) host,
1527 and the trailing two digits of the smtp 4xx response.
1529 GF/01 Bug 1715: Fix for race condition in exicyclog, where exim could attempt
1530 to write to mainlog (or rejectlog, paniclog) in the window between file
1531 creation and permissions/ownership being changed. Particularly affects
1532 installations where exicyclog is run as root, rather than exim user;
1533 result is that the running daemon panics and dies.
1535 JH/20 Bug 1701: For MySQL lookups, support MySQL config file option group names.
1537 JH/21 Bug 1720: Add support for priority groups and weighted-random proxy
1538 selection for the EXPERIMENTAL_SOCKS feature, via new per-proxy options
1539 "pri" and "weight". Note that the previous implicit priority given by the
1540 list order is no longer honoured.
1542 JH/22 Bugs 963, 1721: Fix some corner cases in message body canonicalization
1543 for DKIM processing.
1545 JH/23 Move SOCKS5 support from Experimental to mainline, enabled for a build
1546 by defining SUPPORT_SOCKS.
1548 JH/26 Move PROXY support from Experimental to mainline, enabled for a build
1549 by defining SUPPORT_PROXY. Note that the proxy_required_hosts option
1550 is renamed to hosts_proxy, and the proxy_{host,target}_{address,port}.
1551 variables are renamed to proxy_{local,external}_{address,port}.
1553 JH/27 Move Internationalisation support from Experimental to mainline, enabled
1554 for a build by defining SUPPORT_I18N
1556 JH/28 Bug 1745: Fix redis lookups to handle (quoted) spaces embedded in parts
1557 of the query string, and make ${quote_redis:} do that quoting.
1559 JH/29 Move Events support from Experimental to mainline, enabled by default
1560 and removable for a build by defining DISABLE_EVENT.
1562 JH/30 Updated DANE implementation code to current from Viktor Dukhovni.
1564 JH/31 Fix bug with hosts_connection_nolog and named-lists which were wrongly
1565 cached by the daemon.
1567 JH/32 Move Redis support from Experimental to mainline, enabled for a build
1568 by defining LOOKUP_REDIS. The libhiredis library is required.
1570 JH/33 Bug 1748: Permit ACL dnslists= condition in non-smtp ACLs if explicit
1571 keys are given for lookup.
1573 JH/34 Bug 1192: replace the embedded copy of PolarSSL RSA routines in the DKIM
1574 support, by using OpenSSL or GnuTLS library ones. This means DKIM is
1575 only supported when built with TLS support. The PolarSSL SHA routines
1576 are still used when the TLS library is too old for convenient support.
1578 JH/35 Require SINGLE_DH_USE by default in OpenSSL (main config option
1579 openssl_options), for security. OpenSSL forces this from version 1.1.0
1580 server-side so match that on older versions.
1582 JH/36 Bug 1778: longstanding bug in memory use by the ${run } expansion: A fresh
1583 allocation for $value could be released as the expansion processing
1584 concluded, but leaving the global pointer active for it.
1586 JH/37 Bug 1769: Permit a VRFY ACL to override the default 252 response,
1587 and to use the domains and local_parts ACL conditions.
1589 JH/38 Fix cutthrough bug with body lines having a single dot. The dot was
1590 incorrectly not doubled on cutthrough transmission, hence seen as a
1591 body-termination at the receiving system - resulting in truncated mails.
1592 Commonly the sender saw a TCP-level error, and retransmitted the message
1593 via the normal store-and-forward channel. This could result in duplicates
1594 received - but deduplicating mailstores were liable to retain only the
1595 initial truncated version.
1597 JH/39 Bug 1781: Fix use of DKIM private-keys having trailing '=' in the base-64.
1599 JH/40 Fix crash in queryprogram router when compiled with EXPERIMENTAL_SRS.
1601 JH/41 Bug 1792: Fix selection of headers to sign for DKIM: bottom-up. While
1602 we're in there, support oversigning also; bug 1309.
1604 JH/42 Bug 1796: Fix error logged on a malware scanner connection failure.
1606 HS/04 Add support for keep_environment and add_environment options.
1608 JH/43 Tidy coding issues detected by gcc --fsanitize=undefined. Some remain;
1609 either intentional arithmetic overflow during PRNG, or testing config-
1612 JH/44 Bug 1800: The combination of a -bhc commandline option and cutthrough
1613 delivery resulted in actual delivery. Cancel cutthrough before DATA
1616 JH/45 Fix cutthrough, when connection not opened by verify and target hard-
1617 rejects a recipient: pass the reject to the originator.
1619 JH/46 Multiple issues raised by Coverity. Some were obvious or plausible bugs.
1620 Many were false-positives and ignorable, but it's worth fixing the
1623 JH/47 Fix build on HP-UX and older Solaris, which need (un)setenv now also
1624 for the new environment-manipulation done at startup. Move the routines
1625 from being local to tls.c to being global via the os.c file.
1627 JH/48 Bug 1807: Fix ${extract } for the numeric/3-string case. While preparsing
1628 an extract embedded as result-arg for a map, the first arg for extract
1629 is unavailable so we cannot tell if this is a numbered or keyed
1630 extraction. Accept either.
1636 JH/01 Bug 1545: The smtp transport option "retry_include_ip_address" is now
1639 JH/02 The smtp transport option "multi_domain" is now expanded.
1641 JH/03 The smtp transport now requests PRDR by default, if the server offers
1644 JH/04 Certificate name checking on server certificates, when exim is a client,
1645 is now done by default. The transport option tls_verify_cert_hostnames
1646 can be used to disable this per-host. The build option
1647 EXPERIMENTAL_CERTNAMES is withdrawn.
1649 JH/05 The value of the tls_verify_certificates smtp transport and main options
1650 default to the word "system" to access the system default CA bundle.
1651 For GnuTLS, only version 3.0.20 or later.
1653 JH/06 Verification of the server certificate for a TLS connection is now tried
1654 (but not required) by default. The verification status is now logged by
1655 default, for both outbound TLS and client-certificate supplying inbound
1658 JH/07 Changed the default rfc1413 lookup settings to disable calls. Few
1661 JH/08 The EXPERIMENTAL_DSN compile option is no longer needed; all Delivery
1662 Status Notification (bounce) messages are now MIME format per RFC 3464.
1663 Support for RFC 3461 DSN options NOTIFY,ENVID,RET,ORCPT can be advertised
1664 under the control of the dsn_advertise_hosts option, and routers may
1665 have a dsn_lasthop option.
1667 JH/09 A timeout of 2 minutes is now applied to all malware scanner types by
1668 default, modifiable by a malware= option. The list separator for
1669 the options can now be changed in the usual way. Bug 68.
1671 JH/10 The smtp_receive_timeout main option is now expanded before use.
1673 JH/11 The incoming_interface log option now also enables logging of the
1674 local interface on delivery outgoing connections.
1676 JH/12 The cutthrough-routing facility now supports multi-recipient mails,
1677 if the interface and destination host and port all match.
1679 JH/13 Bug 344: The verify = reverse_host_lookup ACL condition now accepts a
1682 JH/14 Bug 1573: The spam= ACL condition now additionally supports Rspamd.
1683 Patch from Andrew Lewis.
1685 JH/15 Bug 670: The spamd_address main option (for the spam= ACL condition)
1686 now supports optional time-restrictions, weighting, and priority
1687 modifiers per server. Patch originally by <rommer@active.by>.
1689 JH/16 The spamd_address main option now supports a mixed list of local
1690 and remote servers. Remote servers can be IPv6 addresses, and
1691 specify a port-range.
1693 JH/17 Bug 68: The spamd_address main option now supports an optional
1694 timeout value per server.
1696 JH/18 Bug 1581: Router and transport options headers_add/remove can
1697 now have the list separator specified.
1699 JH/19 Bug 392: spamd_address, and clamd av_scanner, now support retry
1702 JH/20 Bug 1571: Ensure that $tls_in_peerdn is set, when verification fails
1705 JH/21 Support for the A6 type of dns record is withdrawn.
1707 JH/22 Bug 608: The result of a QUIT or not-QUIT toplevel ACL now matters
1708 rather than the verbs used.
1710 JH/23 Bug 1572: Increase limit on SMTP confirmation message copy size
1711 from 255 to 1024 chars.
1713 JH/24 Verification callouts now attempt to use TLS by default.
1715 HS/01 DNSSEC options (dnssec_require_domains, dnssec_request_domains)
1716 are generic router options now. The defaults didn't change.
1718 JH/25 Bug 466: Add RFC2322 support for MIME attachment filenames.
1719 Original patch from Alexander Shikoff, worked over by JH.
1721 HS/02 Bug 1575: exigrep falls back to autodetection of compressed
1722 files if ZCAT_COMMAND is not executable.
1724 JH/26 Bug 1539: Add timeout/retry options on dnsdb lookups.
1726 JH/27 Bug 286: Support SOA lookup in dnsdb lookups.
1728 JH/28 Bug 1588: Do not use the A lookup following an AAAA for setting the FQDN.
1729 Normally benign, it bites when the pair was led to by a CNAME;
1730 modern usage is to not canonicalize the domain to a CNAME target
1731 (and we were inconsistent anyway for A-only vs AAAA+A).
1733 JH/29 Bug 1632: Removed the word "rejected" from line logged for ACL discards.
1735 JH/30 Check the forward DNS lookup for DNSSEC, in addition to the reverse,
1736 when evaluating $sender_host_dnssec.
1738 JH/31 Check the HELO verification lookup for DNSSEC, adding new
1739 $sender_helo_dnssec variable.
1741 JH/32 Bug 1397: Enable ECDHE on OpenSSL, just the NIST P-256 curve.
1743 JH/33 Bug 1346: Note MAIL cmd seen in -bS batch, to avoid smtp_no_mail log.
1745 JH/34 Bug 1648: Fix a memory leak seen with "mailq" and large queues.
1747 JH/35 Bug 1642: Fix support of $spam_ variables at delivery time. Was
1748 documented as working, but never had. Support all but $spam_report.
1750 JH/36 Bug 1659: Guard checking of input smtp commands again pseudo-command
1751 added for tls authenticator.
1753 HS/03 Add perl_taintmode main config option
1759 TL/01 When running the test suite, the README says that variables such as
1760 no_msglog_check are global and can be placed anywhere in a specific
1761 test's script, however it was observed that placement needed to be near
1762 the beginning for it to behave that way. Changed the runtest perl
1763 script to read through the entire script once to detect and set these
1764 variables, reset to the beginning of the script, and then run through
1765 the script parsing/test process like normal.
1767 TL/02 The BSD's have an arc4random API. One of the functions to induce
1768 adding randomness was arc4random_stir(), but it has been removed in
1769 OpenBSD 5.5. Detect this OpenBSD version and skip calling this
1770 function when detected.
1772 JH/01 Expand the EXPERIMENTAL_TPDA feature. Several different events now
1773 cause callback expansion.
1775 TL/03 Bugzilla 1518: Clarify "condition" processing in routers; that
1776 syntax errors in an expansion can be treated as a string instead of
1777 logging or causing an error, due to the internal use of bool_lax
1778 instead of bool when processing it.
1780 JH/02 Add EXPERIMENTAL_DANE, allowing for using the DNS as trust-anchor for
1781 server certificates when making smtp deliveries.
1783 JH/03 Support secondary-separator specifier for MX, SRV, TLSA lookups.
1785 JH/04 Add ${sort {list}{condition}{extractor}} expansion item.
1787 TL/04 Bugzilla 1216: Add -M (related messages) option to exigrep.
1789 TL/05 GitHub Issue 18: Adjust logic testing for true/false in redis lookups.
1790 Merged patch from Sebastian Wiedenroth.
1792 JH/05 Fix results-pipe from transport process. Several recipients, combined
1793 with certificate use, exposed issues where response data items split
1794 over buffer boundaries were not parsed properly. This eventually
1795 resulted in duplicates being sent. This issue only became common enough
1796 to notice due to the introduction of connection certificate information,
1797 the item size being so much larger. Found and fixed by Wolfgang Breyha.
1799 JH/06 Bug 1533: Fix truncation of items in headers_remove lists. A fixed
1800 size buffer was used, resulting in syntax errors when an expansion
1803 JH/07 Add support for directories of certificates when compiled with a GnuTLS
1804 version 3.3.6 or later.
1806 JH/08 Rename the TPDA experimental facility to Event Actions. The #ifdef
1807 is EXPERIMENTAL_EVENT, the main-configuration and transport options
1808 both become "event_action", the variables become $event_name, $event_data
1809 and $event_defer_errno. There is a new variable $verify_mode, usable in
1810 routers, transports and related events. The tls:cert event is now also
1811 raised for inbound connections, if the main configuration event_action
1814 TL/06 In test suite, disable OCSP for old versions of openssl which contained
1815 early OCSP support, but no stapling (appears to be less than 1.0.0).
1817 JH/09 When compiled with OpenSSL and EXPERIMENTAL_CERTNAMES, the checks on
1818 server certificate names available under the smtp transport option
1819 "tls_verify_cert_hostname" now do not permit multi-component wildcard
1822 JH/10 Time-related extraction expansions from certificates now use the main
1823 option "timezone" setting for output formatting, and are consistent
1824 between OpenSSL and GnuTLS compilations. Bug 1541.
1826 JH/11 Fix a crash in mime ACL when meeting a zero-length, quoted or RFC2047-
1827 encoded parameter in the incoming message. Bug 1558.
1829 JH/12 Bug 1527: Autogrow buffer used in reading spool files. Since they now
1830 include certificate info, eximon was claiming there were spoolfile
1833 JH/13 Bug 1521: Fix ldap lookup for single-attr request, multiple-attr return.
1835 JH/14 Log delivery-related information more consistently, using the sequence
1836 "H=<name> [<ip>]" wherever possible.
1838 TL/07 Bug 1547: Omit RFCs from release. Draft and RFCs have licenses which
1839 are problematic for Debian distribution, omit them from the release
1842 JH/15 Updates and fixes to the EXPERIMENTAL_DSN feature.
1844 JH/16 Fix string representation of time values on 64bit time_t architectures.
1847 JH/17 Fix a null-indirection in certextract expansions when a nondefault
1848 output list separator was used.
1853 TL/01 Bugzilla 1506: Re-add a 'return NULL' to silence complaints from static
1854 checkers that were complaining about end of non-void function with no
1857 JH/01 Bug 1513: Fix parsing of quoted parameter values in MIME headers.
1858 This was a regression introduced in 4.83 by another bugfix.
1860 JH/02 Fix broken compilation when EXPERIMENTAL_DSN is enabled.
1862 TL/02 Bug 1509: Fix exipick for enhanced spoolfile specification used when
1863 EXPERIMENTAL_DSN is enabled. Fix from Wolfgang Breyha.
1869 TF/01 Correctly close the server side of TLS when forking for delivery.
1871 When a message was received over SMTP with TLS, Exim failed to clear up
1872 the incoming connection properly after forking off the child process to
1873 deliver the message. In some situations the subsequent outgoing
1874 delivery connection happened to have the same fd number as the incoming
1875 connection previously had. Exim would try to use TLS and fail, logging
1876 a "Bad file descriptor" error.
1878 TF/02 Portability fix for building lookup modules on Solaris when the xpg4
1879 utilities have not been installed.
1881 JH/01 Fix memory-handling in use of acl as a conditional; avoid free of
1882 temporary space as the ACL may create new global variables.
1884 TL/01 LDAP support uses per connection or global context settings, depending
1885 upon the detected version of the libraries at build time.
1887 TL/02 Experimental Proxy Protocol support: allows a proxied SMTP connection
1888 to extract and use the src ip:port in logging and expansions as if it
1889 were a direct connection from the outside internet. PPv2 support was
1890 updated based on HAProxy spec change in May 2014.
1892 JH/02 Add ${listextract {number}{list}{success}{fail}}.
1894 TL/03 Bugzilla 1433: Fix DMARC SEGV with specific From header contents.
1895 Properly escape header and check for NULL return.
1897 PP/01 Continue incomplete 4.82 PP/19 by fixing docs too: use dns_dnssec_ok
1900 JH/03 Bugzilla 1157: support log_selector smtp_confirmation for lmtp.
1902 TL/04 Add verify = header_names_ascii check to reject email with non-ASCII
1903 characters in header names, implemented as a verify condition.
1904 Contributed by Michael Fischer v. Mollard.
1906 TL/05 Rename SPF condition results err_perm and err_temp to standardized
1907 results permerror and temperror. Previous values are deprecated but
1908 still accepted. In a future release, err_perm and err_temp will be
1909 completely removed, which will be a backward incompatibility if the
1910 ACL tests for either of these two old results. Patch contributed by
1911 user bes-internal on the mailing list.
1913 JH/04 Add ${utf8clean:} operator. Contributed by Alex Rau.
1915 JH/05 Bugzilla 305: Log incoming-TLS details on rejects, subject to log
1916 selectors, in both main and reject logs.
1918 JH/06 Log outbound-TLS and port details, subject to log selectors, for a
1921 JH/07 Add malware type "sock" for talking to simple daemon.
1923 JH/08 Bugzilla 1371: Add tls_{,try_}verify_hosts to smtp transport.
1925 JH/09 Bugzilla 1431: Support (with limitations) headers_add/headers_remove in
1926 routers/transports under cutthrough routing.
1928 JH/10 Bugzilla 1005: ACL "condition =" should accept values which are negative
1929 numbers. Touch up "bool" conditional to keep the same definition.
1931 TL/06 Remove duplicated language in spec file from 4.82 TL/16.
1933 JH/11 Add dnsdb tlsa lookup. From Todd Lyons.
1935 JH/12 Expand items in router/transport headers_add or headers_remove lists
1936 individually rather than the list as a whole. Bug 1452.
1938 Required for reasonable handling of multiple headers_ options when
1939 they may be empty; requires that headers_remove items with embedded
1940 colons must have them doubled (or the list-separator changed).
1942 TL/07 Add new dmarc expansion variable $dmarc_domain_policy to directly
1943 view the policy declared in the DMARC record. Currently, $dmarc_status
1944 is a combined value of both the record presence and the result of the
1947 JH/13 Fix handling of $tls_cipher et.al. in (non-verify) transport. Bug 1455.
1949 JH/14 New options dnssec_request_domains, dnssec_require_domains on the
1950 dnslookup router and the smtp transport (applying to the forward
1953 TL/08 Bugzilla 1453: New LDAP "SERVERS=" option allows admin to override list
1954 of ldap servers used for a specific lookup. Patch provided by Heiko
1957 JH/18 New options dnssec_lax, dnssec_strict on dnsdb lookups.
1958 New variable $lookup_dnssec_authenticated for observability.
1960 TL/09 Bugzilla 609: Add -C option to exiqgrep, specify which exim.conf to use.
1961 Patch submitted by Lars Timman.
1963 JH/19 EXPERIMENTAL_OCSP support under GnuTLS. Bug 1459.
1965 TL/10 Bugzilla 1454: New -oMm option to pass message reference to Exim.
1966 Requires trusted mode and valid format message id, aborts otherwise.
1967 Patch contributed by Heiko Schlichting.
1969 JH/20 New expansion variables tls_(in,out)_(our,peer)cert, and expansion item
1970 certextract with support for various fields. Bug 1358.
1972 JH/21 Observability of OCSP via variables tls_(in,out)_ocsp. Stapling
1973 is requested by default, modifiable by smtp transport option
1976 JH/22 Expansion operators ${md5:string} and ${sha1:string} can now
1977 operate on certificate variables to give certificate fingerprints
1978 Also new ${sha256:cert_variable}.
1980 JH/23 The PRDR feature is moved from being Experimental into the mainline.
1982 TL/11 Bug 1119: fix memory allocation in string_printing2(). Patch from
1983 Christian Aistleitner.
1985 JH/24 The OCSP stapling feature is moved from Experimental into the mainline.
1987 TL/12 Bug 1444: Fix improper \r\n sequence handling when writing spool
1988 file. Patch from Wolfgang Breyha.
1990 JH/25 Expand the coverage of the delivery $host and $host_address to
1991 client authenticators run in verify callout. Bug 1476.
1993 JH/26 Port service names are now accepted for tls_on_connect_ports, to
1994 align with daemon_smtp_ports. Bug 72.
1996 TF/03 Fix udpsend. The ip_connectedsocket() function's socket type
1997 support and error reporting did not work properly.
1999 TL/13 Bug 1495: Exiqgrep check if -C config file specified on cli exists
2000 and is readable. Patch from Andrew Colin Kissa.
2002 TL/14 Enhance documentation of ${run expansion and how it parses the
2003 commandline after expansion, particularly in the case when an
2004 unquoted variable expansion results in an empty value.
2006 JH/27 The TLS SNI feature was broken in 4.82. Fix it.
2008 PP/02 Fix internal collision of T_APL on systems which support RFC3123
2009 by renaming away from it. Addresses GH issue 15, reported by
2012 JH/28 Fix parsing of MIME headers for parameters with quoted semicolons.
2014 TL/15 SECURITY: prevent double expansion in math comparison functions
2015 (can expand unsanitized data). Not remotely exploitable.
2022 PP/01 Add -bI: framework, and -bI:sieve for querying sieve capabilities.
2024 PP/02 Make -n do something, by making it not do something.
2025 When combined with -bP, the name of an option is not output.
2027 PP/03 Added tls_dh_min_bits SMTP transport driver option, only honoured
2030 PP/04 First step towards DNSSEC, provide $sender_host_dnssec for
2031 $sender_host_name and config options to manage this, and basic check
2034 PP/05 DSCP support for outbound connections and control modifier for inbound.
2036 PP/06 Cyrus SASL: set local and remote IP;port properties for driver.
2037 (Only plugin which currently uses this is kerberos4, which nobody should
2038 be using, but we should make it available and other future plugins might
2039 conceivably use it, even though it would break NAT; stuff *should* be
2040 using channel bindings instead).
2042 PP/07 Handle "exim -L <tag>" to indicate to use syslog with tag as the process
2043 name; added for Sendmail compatibility; requires admin caller.
2044 Handle -G as equivalent to "control = suppress_local_fixups" (we used to
2045 just ignore it); requires trusted caller.
2046 Also parse but ignore: -Ac -Am -X<logfile>
2049 TL/01 Bugzilla 1258 - Refactor MAIL FROM optional args processing.
2051 TL/02 Add +smtp_confirmation as a default logging option.
2053 TL/03 Bugzilla 198 - Implement remove_header ACL modifier.
2054 Patch by Magnus Holmgren from 2007-02-20.
2056 TL/04 Bugzilla 1281 - Spec typo.
2057 Bugzilla 1283 - Spec typo.
2058 Bugzilla 1290 - Spec grammar fixes.
2060 TL/05 Bugzilla 1285 - Spec omission, fix docbook errors for spec.txt creation.
2062 TL/06 Add Experimental DMARC support using libopendmarc libraries.
2064 TL/07 Fix an out of order global option causing a segfault. Reported to dev
2065 mailing list by by Dmitry Isaikin.
2067 JH/01 Bugzilla 1201 & 304 - New cutthrough-delivery feature, with TLS support.
2069 JH/02 Support "G" suffix to numbers in ${if comparisons.
2071 PP/08 Handle smtp transport tls_sni option forced-fail for OpenSSL.
2073 NM/01 Bugzilla 1197 - Spec typo
2074 Bugzilla 1196 - Spec examples corrections
2076 JH/03 Add expansion operators ${listnamed:name} and ${listcount:string}
2078 PP/09 Add gnutls_allow_auto_pkcs11 option (was originally called
2079 gnutls_enable_pkcs11, but renamed to more accurately indicate its
2082 PP/10 Let Linux makefile inherit CFLAGS/CFLAGS_DYNAMIC.
2083 Pulled from Debian 30_dontoverridecflags.dpatch by Andreas Metzler.
2085 JH/04 Add expansion item ${acl {name}{arg}...}, expansion condition
2086 "acl {{name}{arg}...}", and optional args on acl condition
2089 JH/05 Permit multiple router/transport headers_add/remove lines.
2091 JH/06 Add dnsdb pseudo-lookup "a+" to do an "aaaa" + "a" combination.
2093 JH/07 Avoid using a waiting database for a single-message-only transport.
2094 Performance patch from Paul Fisher. Bugzilla 1262.
2096 JH/08 Strip leading/trailing newlines from add_header ACL modifier data.
2099 JH/09 Add $headers_added variable, with content from use of ACL modifier
2100 add_header (but not yet added to the message). Bugzilla 199.
2102 JH/10 Add 8bitmime log_selector, for 8bitmime status on the received line.
2103 Pulled from Bugzilla 817 by Wolfgang Breyha.
2105 PP/11 SECURITY: protect DKIM DNS decoding from remote exploit.
2107 (nb: this is the same fix as in Exim 4.80.1)
2109 JH/11 Add A= logging on delivery lines, and a client_set_id option on
2112 JH/12 Add optional authenticated_sender logging to A= and a log_selector
2115 PP/12 Unbreak server_set_id for NTLM/SPA auth, broken by 4.80 PP/29.
2117 PP/13 Dovecot auth: log better reason to rejectlog if Dovecot did not
2118 advertise SMTP AUTH mechanism to us, instead of a generic
2119 protocol violation error. Also, make Exim more robust to bad
2120 data from the Dovecot auth socket.
2122 TF/01 Fix ultimate retry timeouts for intermittently deliverable recipients.
2124 When a queue runner is handling a message, Exim first routes the
2125 recipient addresses, during which it prunes them based on the retry
2126 hints database. After that it attempts to deliver the message to
2127 any remaining recipients. It then updates the hints database using
2130 So if a recipient address works intermittently, it can get repeatedly
2131 deferred at routing time. The retry hints record remains fresh so the
2132 address never reaches the final cutoff time.
2134 This is a fairly common occurrence when a user is bumping up against
2135 their storage quota. Exim had some logic in its local delivery code
2136 to deal with this. However it did not apply to per-recipient defers
2137 in remote deliveries, e.g. over LMTP to a separate IMAP message store.
2139 This change adds a proper retry rule check during routing so that the
2140 final cutoff time is checked against the message's age. We only do
2141 this check if there is an address retry record and there is not a
2142 domain retry record; this implies that previous attempts to handle
2143 the address had the retry_use_local_parts option turned on. We use
2144 this as an approximation for the destination being like a local
2145 delivery, as in LMTP.
2147 I suspect this new check makes the old local delivery cutoff check
2148 redundant, but I have not verified this so I left the code in place.
2150 TF/02 Correct gecos expansion when From: is a prefix of the username.
2152 Test 0254 submits a message to Exim with the header
2156 When I ran the test suite under the user fanf2, Exim expanded
2157 the header to contain my full name, whereas it should have added
2158 a Resent-Sender: header. It erroneously treats any prefix of the
2159 username as equal to the username.
2161 This change corrects that bug.
2163 GF/01 DCC debug and logging tidyup
2164 Error conditions log to paniclog rather than rejectlog.
2165 Debug lines prefixed by "DCC: " to remove any ambiguity.
2167 TF/03 Avoid unnecessary rebuilds of lookup-related code.
2169 PP/14 Fix OCSP reinitialisation in SNI handling for Exim/TLS as server.
2170 Bug spotted by Jeremy Harris; was flawed since initial commit.
2171 Would have resulted in OCSP responses post-SNI triggering an Exim
2172 NULL dereference and crash.
2174 JH/13 Add $router_name and $transport_name variables. Bugzilla 308.
2176 PP/15 Define SIOCGIFCONF_GIVES_ADDR for GNU Hurd.
2177 Bug detection, analysis and fix by Samuel Thibault.
2178 Bugzilla 1331, Debian bug #698092.
2180 SC/01 Update eximstats to watch out for senders sending 'HELO [IpAddr]'
2182 JH/14 SMTP PRDR (http://www.eric-a-hall.com/specs/draft-hall-prdr-00.txt).
2183 Server implementation by Todd Lyons, client by JH.
2184 Only enabled when compiled with EXPERIMENTAL_PRDR. A new
2185 config variable "prdr_enable" controls whether the server
2186 advertises the facility. If the client requests PRDR a new
2187 acl_data_smtp_prdr ACL is called once for each recipient, after
2188 the body content is received and before the acl_smtp_data ACL.
2189 The client is controlled by both of: a hosts_try_prdr option
2190 on the smtp transport, and the server advertisement.
2191 Default client logging of deliveries and rejections involving
2192 PRDR are flagged with the string "PRDR".
2194 PP/16 Fix problems caused by timeouts during quit ACLs trying to double
2195 fclose(). Diagnosis by Todd Lyons.
2197 PP/17 Update configure.default to handle IPv6 localhost better.
2198 Patch by Alain Williams (plus minor tweaks).
2201 PP/18 OpenSSL made graceful with empty tls_verify_certificates setting.
2202 This is now consistent with GnuTLS, and is now documented: the
2203 previous undocumented portable approach to treating the option as
2204 unset was to force an expansion failure. That still works, and
2205 an empty string is now equivalent.
2207 PP/19 Renamed DNSSEC-enabling option to "dns_dnssec_ok", to make it
2208 clearer that Exim is using the DO (DNSSEC OK) EDNS0 resolver flag,
2209 not performing validation itself.
2211 PP/20 Added force_command boolean option to pipe transport.
2212 Patch from Nick Koston, of cPanel Inc.
2214 JH/15 AUTH support on callouts (and hence cutthrough-deliveries).
2217 TF/04 Added udpsend ACL modifier and hexquote expansion operator
2219 PP/21 Fix eximon continuous updating with timestamped log-files.
2220 Broken in a format-string cleanup in 4.80, missed when I repaired the
2221 other false fix of the same issue.
2222 Report and fix from Heiko Schlichting.
2225 PP/22 Guard LDAP TLS usage against Solaris LDAP variant.
2226 Report from Prashanth Katuri.
2228 PP/23 Support safari_ecdhe_ecdsa_bug for openssl_options.
2229 It's SecureTransport, so affects any MacOS clients which use the
2230 system-integrated TLS libraries, including email clients.
2232 PP/24 Fix segfault from trying to fprintf() to a NULL stdio FILE* if
2233 using a MIME ACL for non-SMTP local injection.
2234 Report and assistance in diagnosis by Warren Baker.
2236 TL/08 Adjust exiqgrep to be case-insensitive for sender/receiver.
2238 JH/16 Fix comparisons for 64b. Bugzilla 1385.
2240 TL/09 Add expansion variable $authenticated_fail_id to keep track of
2241 last id that failed so it may be referenced in subsequent ACL's.
2243 TL/10 Bugzilla 1375 - Prevent TLS rebinding in ldap. Patch provided by
2246 TL/11 Bugzilla 1382 - Option ldap_require_cert overrides start_tls
2247 ldap library initialization, allowing self-signed CA's to be
2248 used. Also properly sets require_cert option later in code by
2249 using NULL (global ldap config) instead of ldap handle (per
2250 session). Bug diagnosis and testing by alxgomz.
2252 TL/12 Enhanced documentation in the ratelimit.pl script provided in
2253 the src/util/ subdirectory.
2255 TL/13 Bug 1031 - Imported transport SQL logging patch from Axel Rau
2256 renamed to Transport Post Delivery Action by Jeremy Harris, as
2259 TL/14 Bugzilla 1217 - Redis lookup support has been added. It is only enabled
2260 when Exim is compiled with EXPERIMENTAL_REDIS. A new config variable
2261 redis_servers = needs to be configured which will be used by the redis
2262 lookup. Patch from Warren Baker, of The Packet Hub.
2264 TL/15 Fix exiqsumm summary for corner case. Patch provided by Richard Hall.
2266 TL/16 Bugzilla 1289 - Clarify host/ip processing when have errors looking up a
2267 hostname or reverse DNS when processing a host list. Used suggestions
2268 from multiple comments on this bug.
2270 TL/17 Bugzilla 1057 - Multiple clamd TCP targets patch from Mark Zealey.
2272 TL/18 Had previously added a -CONTINUE option to runtest in the test suite.
2273 Missed a few lines, added it to make the runtest require no keyboard
2276 TL/19 Bugzilla 1402 - Test 533 fails if any part of the path to the test suite
2277 contains upper case chars. Make router use caseful_local_part.
2279 TL/20 Bugzilla 1400 - Add AVOID_GNUTLS_PKCS11 build option. Allows GnuTLS
2280 support when GnuTLS has been built with p11-kit.
2286 PP/01 SECURITY: protect DKIM DNS decoding from remote exploit.
2288 This, or similar/improved, will also be change PP/11 of 4.82.
2294 PP/01 Handle short writes when writing local log-files.
2295 In practice, only affects FreeBSD (8 onwards).
2296 Bugzilla 1053, with thanks to Dmitry Isaikin.
2298 NM/01 Bugzilla 949 - Documentation tweak
2300 NM/02 Bugzilla 1093 - eximstats DATA reject detection regexps
2303 NM/03 Bugzilla 1169 - primary_hostname spelling was incorrect in docs.
2305 PP/02 Implemented gsasl authenticator.
2307 PP/03 Implemented heimdal_gssapi authenticator with "server_keytab" option.
2309 PP/04 Local/Makefile support for (AUTH|LOOKUP)_*_PC=foo to use
2310 `pkg-config foo` for cflags/libs.
2312 PP/05 Swapped $auth1/$auth2 for gsasl GSSAPI mechanism, to be more consistent
2313 with rest of GSASL and with heimdal_gssapi.
2315 PP/06 Local/Makefile support for USE_(GNUTLS|OPENSSL)_PC=foo to use
2316 `pkg-config foo` for cflags/libs for the TLS implementation.
2318 PP/07 New expansion variable $tls_bits; Cyrus SASL server connection
2319 properties get this fed in as external SSF. A number of robustness
2320 and debugging improvements to the cyrus_sasl authenticator.
2322 PP/08 cyrus_sasl server now expands the server_realm option.
2324 PP/09 Bugzilla 1214 - Log authentication information in reject log.
2325 Patch by Jeremy Harris.
2327 PP/10 Added dbmjz lookup type.
2329 PP/11 Let heimdal_gssapi authenticator take a SASL message without an authzid.
2331 PP/12 MAIL args handles TAB as well as SP, for better interop with
2332 non-compliant senders.
2333 Analysis and variant patch by Todd Lyons.
2335 NM/04 Bugzilla 1237 - fix cases where printf format usage not indicated
2336 Bug report from Lars Müller <lars@samba.org> (via SUSE),
2337 Patch from Dirk Mueller <dmueller@suse.com>
2339 PP/13 tls_peerdn now print-escaped for spool files.
2340 Observed some $tls_peerdn in wild which contained \n, which resulted
2341 in spool file corruption.
2343 PP/14 TLS fixes for OpenSSL: support TLS 1.1 & 1.2; new "openssl_options"
2344 values; set SSL_MODE_AUTO_RETRY so that OpenSSL will retry a read
2345 or write after TLS renegotiation, which otherwise led to messages
2348 TK/01 Bugzilla 1239 - fix DKIM verification when signature was not inserted
2349 as a tracking header (ie: a signed header comes before the signature).
2350 Patch from Wolfgang Breyha.
2352 JH/01 Bugzilla 660 - Multi-valued attributes from ldap now parseable as a
2353 comma-sep list; embedded commas doubled.
2355 JH/02 Refactored ACL "verify =" logic to table-driven dispatch.
2357 PP/15 LDAP: Check for errors of TLS initialisation, to give correct
2359 Report and patch from Dmitry Banschikov.
2361 PP/16 Removed "dont_insert_empty_fragments" from "openssl_options".
2362 Removed SSL_clear() after SSL_new() which led to protocol negotiation
2363 failures. We appear to now support TLS1.1+ with Exim.
2365 PP/17 OpenSSL: new expansion var $tls_sni, which if used in tls_certificate
2366 lets Exim select keys and certificates based upon TLS SNI from client.
2367 Also option tls_sni on SMTP Transports. Also clear $tls_bits correctly
2368 before an outbound SMTP session. New log_selector, +tls_sni.
2370 PP/18 Bugzilla 1122 - check localhost_number expansion for failure, avoid
2371 NULL dereference. Report and patch from Alun Jones.
2373 PP/19 DNS resolver init changes for NetBSD compatibility. (Risk of breakage
2374 on less well tested platforms). Obviates NetBSD pkgsrc patch-ac.
2375 Not seeing resolver debug output on NetBSD, but suspect this is a
2376 resolver implementation change.
2378 PP/20 Revert part of NM/04, it broke log_path containing %D expansions.
2379 Left warnings. Added "eximon gdb" invocation mode.
2381 PP/21 Defaulting "accept_8bitmime" to true, not false.
2383 PP/22 Added -bw for inetd wait mode support.
2385 PP/23 Added PCRE_CONFIG=yes support to Makefile for using pcre-config to
2386 locate the relevant includes and libraries. Made this the default.
2388 PP/24 Fixed headers_only on smtp transports (was not sending trailing dot).
2389 Bugzilla 1246, report and most of solution from Tomasz Kusy.
2391 JH/03 ${eval } now uses 64-bit and supports a "g" suffix (like to "k" and "m").
2392 This may cause build issues on older platforms.
2394 PP/25 Revamped GnuTLS support, passing tls_require_ciphers to
2395 gnutls_priority_init, ignoring Exim options gnutls_require_kx,
2396 gnutls_require_mac & gnutls_require_protocols (no longer supported).
2397 Added SNI support via GnuTLS too.
2398 Made ${randint:..} supplier available, if using not-too-old GnuTLS.
2400 PP/26 Added EXPERIMENTAL_OCSP for OpenSSL.
2402 PP/27 Applied dnsdb SPF support patch from Janne Snabb.
2403 Applied second patch from Janne, implementing suggestion to default
2404 multiple-strings-in-record handling to match SPF spec.
2406 JH/04 Added expansion variable $tod_epoch_l for a higher-precision time.
2408 PP/28 Fix DCC dcc_header content corruption (stack memory referenced,
2409 read-only, out of scope).
2410 Patch from Wolfgang Breyha, report from Stuart Northfield.
2412 PP/29 Fix three issues highlighted by clang analyser static analysis.
2413 Only crash-plausible issue would require the Cambridge-specific
2414 iplookup router and a misconfiguration.
2415 Report from Marcin Mirosław.
2417 PP/30 Another attempt to deal with PCRE_PRERELEASE, this one less buggy.
2419 PP/31 %D in printf continues to cause issues (-Wformat=security), so for
2420 now guard some of the printf checks behind WANT_DEEPER_PRINTF_CHECKS.
2421 As part of this, removing so much warning spew let me fix some minor
2422 real issues in debug logging.
2424 PP/32 GnuTLS was always using default tls_require_ciphers, due to a missing
2425 assignment on my part. Fixed.
2427 PP/33 Added tls_dh_max_bits option, defaulting to current hard-coded limit
2428 of NSS, for GnuTLS/NSS interop. Problem root cause diagnosis by
2429 Janne Snabb (who went above and beyond: thank you).
2431 PP/34 Validate tls_require_ciphers on startup, since debugging an invalid
2432 string otherwise requires a connection and a bunch more work and it's
2433 relatively easy to get wrong. Should also expose TLS library linkage
2436 PP/35 Pull in <features.h> on Linux, for some portability edge-cases of
2437 64-bit ${eval} (JH/03).
2439 PP/36 Define _GNU_SOURCE in exim.h; it's needed for some releases of
2440 GNU libc to support some of the 64-bit stuff, should not lead to
2441 conflicts. Defined before os.h is pulled in, so if a given platform
2442 needs to override this, it can.
2444 PP/37 Unbreak Cyrus SASL auth: SSF retrieval was incorrect, Exim thought
2445 protection layer was required, which is not implemented.
2446 Bugzilla 1254, patch from Wolfgang Breyha.
2448 PP/38 Overhaul DH prime handling, supply RFC-specified DH primes as built
2449 into Exim, default to IKE id 23 from RFC 5114 (2048 bit). Make
2450 tls_dhparam take prime identifiers. Also unbreak combination of
2451 OpenSSL+DH_params+TLSSNI.
2453 PP/39 Disable SSLv2 by default in OpenSSL support.
2459 PP/01 Solaris build fix for Oracle's LDAP libraries.
2460 Bugzilla 1109, patch from Stephen Usher.
2462 TF/01 HP/UX build fix: avoid arithmetic on a void pointer.
2464 TK/01 DKIM Verification: Fix relaxed canon for empty headers w/o
2467 TF/02 Fix a couple more cases where we did not log the error message
2468 when unlink() failed. See also change 4.74-TF/03.
2470 TF/03 Make the exiwhat support code safe for signals. Previously Exim might
2471 lock up or crash if it happened to be inside a call to libc when it
2472 got a SIGUSR1 from exiwhat.
2474 The SIGUSR1 handler appends the current process status to the process
2475 log which is later printed by exiwhat. It used to use the general
2476 purpose logging code to do this, but several functions it calls are
2477 not safe for signals.
2479 The new output code in the SIGUSR1 handler is specific to the process
2480 log, and simple enough that it's easy to inspect for signal safety.
2481 Removing some special cases also simplifies the general logging code.
2482 Removing the spurious timestamps from the process log simplifies
2485 TF/04 Improved ratelimit ACL condition.
2487 The /noupdate option has been deprecated in favour of /readonly which
2488 has clearer semantics. The /leaky, /strict, and /readonly update modes
2489 are mutually exclusive. The update mode is no longer included in the
2490 database key; it just determines when the database is updated. (This
2491 means that when you upgrade Exim will forget old rate measurements.)
2493 Exim now checks that the per_* options are used with an update mode that
2494 makes sense for the current ACL. For example, when Exim is processing a
2495 message (e.g. acl_smtp_rcpt or acl_smtp_data, etc.) you can specify
2496 per_mail/leaky or per_mail/strict; otherwise (e.g. in acl_smtp_helo) you
2497 must specify per_mail/readonly. If you omit the update mode it defaults to
2498 /leaky where that makes sense (as before) or /readonly where required.
2500 The /noupdate option is now undocumented but still supported for
2501 backwards compatibility. It is equivalent to /readonly except that in
2502 ACLs where /readonly is required you may specify /leaky/noupdate or
2503 /strict/noupdate which are treated the same as /readonly.
2505 A useful new feature is the /count= option. This is a generalization
2506 of the per_byte option, so that you can measure the throughput of other
2507 aggregate values. For example, the per_byte option is now equivalent
2508 to per_mail/count=${if >{0}{$message_size} {0} {$message_size} }.
2510 The per_rcpt option has been generalized using the /count= mechanism
2511 (though it's more complicated than the per_byte equivalence). When it is
2512 used in acl_smtp_rcpt, the per_rcpt option adds recipients to the
2513 measured rate one at a time; if it is used later (e.g. in acl_smtp_data)
2514 or in a non-SMTP ACL it adds all the recipients in one go. (The latter
2515 /count=$recipients_count behaviour used to work only in non-SMTP ACLs.)
2516 Note that using per_rcpt with a non-readonly update mode in more than
2517 one ACL will cause the recipients to be double-counted. (The per_mail
2518 and per_byte options don't have this problem.)
2520 The handling of very low rates has changed slightly. If the computed rate
2521 is less than the event's count (usually one) then this event is the first
2522 after a long gap. In this case the rate is set to the same as this event's
2523 count, so that the first message of a spam run is counted properly.
2525 The major new feature is a mechanism for counting the rate of unique
2526 events. The new per_addr option counts the number of different
2527 recipients that someone has sent messages to in the last time period. It
2528 behaves like per_rcpt if all the recipient addresses are different, but
2529 duplicate recipient addresses do not increase the measured rate. Like
2530 the /count= option this is a general mechanism, so the per_addr option
2531 is equivalent to per_rcpt/unique=$local_part@$domain. You can, for
2532 example, measure the rate that a client uses different sender addresses
2533 with the options per_mail/unique=$sender_address. There are further
2534 details in the main documentation.
2536 TF/05 Removed obsolete $Cambridge$ CVS revision strings.
2538 TF/06 Removed a few PCRE remnants.
2540 TF/07 Automatically extract Exim's version number from tags in the git
2541 repository when doing development or release builds.
2543 PP/02 Raise smtp_cmd_buffer_size to 16kB.
2544 Bugzilla 879. Patch from Paul Fisher.
2546 PP/03 Implement SSL-on-connect outbound with protocol=smtps on smtp transport.
2547 Heavily based on revision 40f9a89a from Simon Arlott's tree.
2550 PP/04 Use .dylib instead of .so for dynamic library loading on MacOS.
2552 PP/05 Variable $av_failed, true if the AV scanner deferred.
2553 Bugzilla 1078. Patch from John Horne.
2555 PP/06 Stop make process more reliably on build failure.
2556 Bugzilla 1087. Patch from Heiko Schlittermann.
2558 PP/07 Make maildir_use_size_file an _expandable_ boolean.
2559 Bugzilla 1089. Patch from Heiko Schlittermann.
2561 PP/08 Handle ${run} returning more data than OS pipe buffer size.
2562 Bugzilla 1131. Patch from Holger Weiß.
2564 PP/09 Handle IPv6 addresses with SPF.
2565 Bugzilla 860. Patch from Wolfgang Breyha.
2567 PP/10 GnuTLS: support TLS 1.2 & 1.1.
2569 Use gnutls_certificate_verify_peers2() [patch from Andreas Metzler].
2572 PP/11 match_* no longer expand right-hand-side by default.
2573 New compile-time build option, EXPAND_LISTMATCH_RHS.
2574 New expansion conditions, "inlist", "inlisti".
2576 PP/12 fix uninitialised greeting string from PP/03 (smtps client support).
2578 PP/13 shell and compiler warnings fixes for RC1-RC4 changes.
2580 PP/14 fix log_write() format string regression from TF/03.
2581 Bugzilla 1152. Patch from Dmitry Isaikin.
2587 PP/01 The new ldap_require_cert option would segfault if used. Fixed.
2589 PP/02 Harmonised TLS library version reporting; only show if debugging.
2590 Layout now matches that introduced for other libraries in 4.74 PP/03.
2592 PP/03 New openssl_options items: no_sslv2 no_sslv3 no_ticket no_tlsv1
2594 PP/04 New "dns_use_edns0" global option.
2596 PP/05 Don't segfault on misconfiguration of ref:name exim-user as uid.
2599 PP/06 Extra paranoia around buffer usage at the STARTTLS transition.
2600 nb: Exim is not vulnerable to http://www.kb.cert.org/vuls/id/555316
2602 TK/01 Updated PolarSSL code to 0.14.2.
2603 Bugzilla 1097. Patch from Andreas Metzler.
2605 PP/07 Catch divide-by-zero in ${eval:...}.
2606 Fixes bugzilla 1102.
2608 PP/08 Condition negation of bool{}/bool_lax{} did not negate. Fixed.
2611 TK/02 Bugzilla 1106: CVE-2011-1764 - DKIM log line was subject to a
2612 format-string attack -- SECURITY: remote arbitrary code execution.
2614 TK/03 SECURITY - DKIM signature header parsing was double-expanded, second
2615 time unintentionally subject to list matching rules, letting the header
2616 cause arbitrary Exim lookups (of items which can occur in lists, *not*
2617 arbitrary string expansion). This allowed for information disclosure.
2619 PP/09 Fix another SIGFPE (x86) in ${eval:...} expansion, this time related to
2620 INT_MIN/-1 -- value coerced to INT_MAX.
2626 NM/01 Workaround for PCRE version dependency in version reporting
2629 TF/01 Update valgrind.h and memcheck.h to copies from valgrind-3.6.0.
2630 This fixes portability to compilers other than gcc, notably
2631 Solaris CC and HP-UX CC. Fixes Bugzilla 1050.
2633 TF/02 Bugzilla 139: Avoid using the += operator in the modular lookup
2634 makefiles for portability to HP-UX and POSIX correctness.
2636 PP/01 Permit LOOKUP_foo enabling on the make command-line.
2637 Also via indented variable definition in the Makefile.
2638 (Debugging by Oliver Heesakkers).
2640 PP/02 Restore caching of spamd results with expanded spamd_address.
2641 Patch from author of expandable spamd_address patch, Wolfgang Breyha.
2643 PP/03 Build issue: lookups-Makefile now exports LC_ALL=C
2644 Improves build reliability. Fix from: Frank Elsner
2646 NM/02 Fix wide character breakage in the rfc2047 coding
2647 Fixes bug 1064. Patch from Andrey N. Oktyabrski
2649 NM/03 Allow underscore in dnslist lookups
2650 Fixes bug 1026. Patch from Graeme Fowler
2652 PP/04 Bugzilla 230: Support TLS-enabled LDAP (in addition to ldaps).
2653 Code patches from Adam Ciarcinski of NetBSD.
2655 NM/04 Fixed exiqgrep to cope with mailq missing size issue
2658 PP/05 Bugzilla 1083: when lookup expansion defers, escape the output which
2659 is logged, to avoid truncation. Patch from John Horne.
2661 PP/06 Bugzilla 1042: implement freeze_signal on pipe transports.
2662 Patch from Jakob Hirsch.
2664 PP/07 Bugzilla 1061: restrict error messages sent over SMTP to not reveal
2665 SQL string expansion failure details.
2666 Patch from Andrey Oktyabrski.
2668 PP/08 Bugzilla 486: implement %M datestamping in log filenames.
2669 Patch from Simon Arlott.
2671 PP/09 New lookups functionality failed to compile on old gcc which rejects
2672 extern declarations in function scope.
2673 Patch from Oliver Fleischmann
2675 PP/10 Use sig_atomic_t for flags set from signal handlers.
2676 Check getgroups() return and improve debugging.
2677 Fixed developed for diagnosis in bug 927 (which turned out to be
2680 PP/11 Bugzilla 1055: Update $message_linecount for maildir_tag.
2681 Patch from Mark Zealey.
2683 PP/12 Bugzilla 1056: Improved spamd server selection.
2684 Patch from Mark Zealey.
2686 PP/13 Bugzilla 1086: Deal with maildir quota file races.
2687 Based on patch from Heiko Schlittermann.
2689 PP/14 Bugzilla 1019: DKIM multiple signature generation fix.
2690 Patch from Uwe Doering, sign-off by Michael Haardt.
2692 NM/05 Fix to spam.c to accommodate older gcc versions which dislike
2693 variable declaration deep within a block. Bug and patch from
2696 PP/15 lookups-Makefile IRIX compatibility coercion.
2698 PP/16 Make DISABLE_DKIM build knob functional.
2700 NM/06 Bugzilla 968: child_open_uid: restore default SIGPIPE handler
2701 Patch by Simon Arlott
2703 TF/03 Fix valgrind.h portability to C89 compilers that do not support
2704 variable argument macros. Our copy now differs from upstream.
2710 TF/01 Failure to get a lock on a hints database can have serious
2711 consequences so log it to the panic log.
2713 TF/02 Log LMTP confirmation messages in the same way as SMTP,
2714 controlled using the smtp_confirmation log selector.
2716 TF/03 Include the error message when we fail to unlink a spool file.
2718 DW/01 Bugzilla 139: Support dynamically loaded lookups as modules.
2719 With thanks to Steve Haslam, Johannes Berg & Serge Demonchaux
2720 for maintaining out-of-tree patches for some time.
2722 PP/01 Bugzilla 139: Documentation and portability issues.
2723 Avoid GNU Makefile-isms, let Exim continue to build on BSD.
2724 Handle per-OS dynamic-module compilation flags.
2726 PP/02 Let /dev/null have normal permissions.
2727 The 4.73 fixes were a little too stringent and complained about the
2728 permissions on /dev/null. Exempt it from some checks.
2729 Reported by Andreas M. Kirchwitz.
2731 PP/03 Report version information for many libraries, including
2732 Exim version information for dynamically loaded libraries. Created
2733 version.h, now support a version extension string for distributors
2734 who patch heavily. Dynamic module ABI change.
2736 PP/04 CVE-2011-0017 - check return value of setuid/setgid. This is a
2737 privilege escalation vulnerability whereby the Exim run-time user
2738 can cause root to append content of the attacker's choosing to
2741 PP/05 Bugzilla 1041: merged DCC maintainer's fixes for return code.
2744 PP/06 Bugzilla 1071: fix delivery logging with untrusted macros.
2745 If dropping privileges for untrusted macros, we disabled normal logging
2746 on the basis that it would fail; for the Exim run-time user, this is not
2747 the case, and it resulted in successful deliveries going unlogged.
2748 Fixed. Reported by Andreas Metzler.
2754 PP/01 Date: & Message-Id: revert to normally being appended to a message,
2755 only prepend for the Resent-* case. Fixes regression introduced in
2756 Exim 4.70 by NM/22 for Bugzilla 607.
2758 PP/02 Include check_rfc2047_length in configure.default because we're seeing
2759 increasing numbers of administrators be bitten by this.
2761 JJ/01 Added DISABLE_DKIM and comment to src/EDITME
2763 PP/03 Bugzilla 994: added openssl_options main configuration option.
2765 PP/04 Bugzilla 995: provide better SSL diagnostics on failed reads.
2767 PP/05 Bugzilla 834: provide a permit_coredump option for pipe transports.
2769 PP/06 Adjust NTLM authentication to handle SASL Initial Response.
2771 PP/07 If TLS negotiated an anonymous cipher, we could end up with SSL but
2772 without a peer certificate, leading to a segfault because of an
2773 assumption that peers always have certificates. Be a little more
2774 paranoid. Problem reported by Martin Tscholak.
2776 PP/08 Bugzilla 926: switch ClamAV to use the new zINSTREAM API for content
2777 filtering; old API available if built with WITH_OLD_CLAMAV_STREAM=yes
2778 NB: ClamAV planning to remove STREAM in "middle of 2010".
2779 CL also introduces -bmalware, various -d+acl logging additions and
2780 more caution in buffer sizes.
2782 PP/09 Implemented reverse_ip expansion operator.
2784 PP/10 Bugzilla 937: provide a "debug" ACL control.
2786 PP/11 Bugzilla 922: Documentation dusting, patch provided by John Horne.
2788 PP/12 Bugzilla 973: Implement --version.
2790 PP/13 Bugzilla 752: Refuse to build/run if Exim user is root/0.
2792 PP/14 Build without WITH_CONTENT_SCAN. Path from Andreas Metzler.
2794 PP/15 Bugzilla 816: support multiple condition rules on Routers.
2796 PP/16 Add bool_lax{} expansion operator and use that for combining multiple
2797 condition rules, instead of bool{}. Make both bool{} and bool_lax{}
2798 ignore trailing whitespace.
2800 JJ/02 prevent non-panic DKIM error from being sent to paniclog
2802 JJ/03 added tcp_wrappers_daemon_name to allow host entries other than
2805 PP/17 Fix malware regression for cmdline scanner introduced in PP/08.
2806 Notification from Dr Andrew Aitchison.
2808 PP/18 Change ClamAV response parsing to be more robust and to handle ClamAV's
2809 ExtendedDetectionInfo response format.
2810 Notification from John Horne.
2812 PP/19 OpenSSL 1.0.0a compatibility const-ness change, should be backwards
2815 PP/20 Added a CONTRIBUTING file. Fixed the documentation build to use http:
2816 XSL and documented dependency on system catalogs, with examples of how
2819 DW/21 Added Valgrind hooks in store.c to help it capture out-of-bounds store
2822 DW/22 Bugzilla 1044: CVE-2010-4345 - partial fix: restrict default behaviour
2823 of CONFIGURE_OWNER and CONFIGURE_GROUP options to no longer allow a
2824 configuration file which is writeable by the Exim user or group.
2826 DW/23 Bugzilla 1044: CVE-2010-4345 - part two: extend checks for writeability
2827 of configuration files to cover files specified with the -C option if
2828 they are going to be used with root privileges, not just the default
2831 DW/24 Bugzilla 1044: CVE-2010-4345 - part three: remove ALT_CONFIG_ROOT_ONLY
2832 option (effectively making it always true).
2834 DW/25 Add TRUSTED_CONFIG_PREFIX_FILE option to allow alternative configuration
2835 files to be used while preserving root privileges.
2837 DW/26 Set FD_CLOEXEC on SMTP sockets after forking in the daemon, to ensure
2838 that rogue child processes cannot use them.
2840 PP/27 Bugzilla 1047: change the default for system_filter_user to be the Exim
2841 run-time user, instead of root.
2843 PP/28 Add WHITELIST_D_MACROS option to let some macros be overridden by the
2844 Exim run-time user without dropping privileges.
2846 DW/29 Remove use of va_copy() which breaks pre-C99 systems. Duplicate the
2847 result string, instead of calling string_vformat() twice with the same
2850 DW/30 Allow TRUSTED_CONFIG_PREFIX_FILE only for Exim or CONFIGURE_OWNER, not
2851 for other users. Others should always drop root privileges if they use
2852 -C on the command line, even for a whitelisted configure file.
2854 DW/31 Turn TRUSTED_CONFIG_PREFIX_FILE into TRUSTED_CONFIG_FILE. No prefixes.
2856 NM/01 Fixed bug #1002 - Message loss when using multiple deliveries
2862 JJ/01 installed exipick 20100104.1, adding $max_received_linelength,
2863 $data_path, and $header_path variables; fixed documentation bugs and
2866 JJ/02 installed exipick 20100222.0, added --input-dir and --finput to allow
2867 exipick to access non-standard spools, including the "frozen" queue
2870 NM/01 Bugzilla 965: Support mysql stored procedures.
2871 Patch from Alain Williams
2873 NM/02 Bugzilla 961: Spacing fix (syntax error) on Makefile directives for NetBSD
2875 NM/03 Bugzilla 955: Documentation fix for max_rcpts.
2876 Patch from Andreas Metzler
2878 NM/04 Bugzilla 954: Fix for unknown responses from Dovecot authenticator.
2879 Patch from Kirill Miazine
2881 NM/05 Bugzilla 671: Added umask to procmail example.
2883 JJ/03 installed exipick 20100323.0, fixing doc bug
2885 NM/06 Bugzilla 988: CVE-2010-2023 - prevent hardlink attack on sticky mail
2886 directory. Notification and patch from Dan Rosenberg.
2888 TK/01 PDKIM: Upgrade PolarSSL files to upstream version 0.12.1.
2890 TK/02 Improve log output when DKIM signing operation fails.
2892 MH/01 Treat the transport option dkim_domain as a colon separated
2893 list, not as a single string, and sign the message with each element,
2894 omitting multiple occurences of the same signer.
2896 NM/07 Null terminate DKIM strings, Null initialise DKIM variable
2897 Bugzilla 985, 986. Patch by Simon Arlott
2899 NM/08 Bugzilla 967. dnsdb DNS TXT record bug fix (DKIM-related)
2900 Patch by Simon Arlott
2902 PP/01 Bugzilla 989: CVE-2010-2024 - work round race condition on
2903 MBX locking. Notification from Dan Rosenberg.
2909 TK/01 Bugzilla 912: Fix DKIM segfault on empty headers/body.
2911 NM/01 Bugzilla 913: Documentation fix for gnutls_* options.
2913 NM/02 Bugzilla 722: Documentation for randint. Better randomness defaults.
2915 NM/03 Bugzilla 847: Enable DNSDB lookup by default.
2917 NM/04 Bugzilla 915: Flag broken perl installation during build.
2923 TK/01 Added patch by Johannes Berg that expands the main option
2924 "spamd_address" if it starts with a dollar sign.
2926 TK/02 Write list of recipients to X-Envelope-Sender header when building
2927 the mbox-format spool file for content scanning (suggested by Jakob
2930 TK/03 Added patch by Wolfgang Breyha that adds experimental DCC
2931 (http://www.dcc-servers.net/) support via dccifd. Activated by
2932 setting EXPERIMENTAL_DCC=yes in Local/Makefile.
2934 TK/04 Bugzilla 673: Add f-protd malware scanner support. Patch submitted
2935 by Mark Daniel Reidel <mr@df.eu>.
2937 NM/01 Bugzilla 657: Embedded PCRE removed from the exim source tree.
2938 When building exim an external PCRE library is now needed -
2939 PCRE is a system library on the majority of modern systems.
2940 See entry on PCRE_LIBS in EDITME file.
2942 NM/02 Bugzilla 646: Removed unwanted C/R in Dovecot authenticator
2943 conversation. Added nologin parameter to request.
2944 Patch contributed by Kirill Miazine.
2946 TF/01 Do not log submission mode rewrites if they do not change the address.
2948 TF/02 Bugzilla 662: Fix stack corruption before exec() in daemon.c.
2950 NM/03 Bugzilla 602: exicyclog now handles panic log, and creates empty
2951 log files in place. Contributed by Roberto Lima.
2953 NM/04 Bugzilla 667: Close socket used by dovecot authenticator.
2955 TF/03 Bugzilla 615: When checking the local_parts router precondition
2956 after a local_part_suffix or local_part_prefix option, Exim now
2957 does not use the address's named list lookup cache, since this
2958 contains cached lookups for the whole local part.
2960 NM/05 Bugzilla 521: Integrated SPF Best Guess support contributed by
2961 Robert Millan. Documentation is in experimental-spec.txt.
2963 TF/04 Bugzilla 668: Fix parallel build (make -j).
2965 NM/05.2 Bugzilla 437: Prevent Maildir aux files being created with mode 000.
2967 NM/05.3 Bugzilla 598: Improvement to Dovecot authenticator handling.
2968 Patch provided by Jan Srzednicki.
2970 TF/05 Leading white space used to be stripped from $spam_report which
2971 wrecked the formatting. Now it is preserved.
2973 TF/06 Save $spam_score, $spam_bar, and $spam_report in spool files, so
2974 that they are available at delivery time.
2976 TF/07 Fix the way ${extract is skipped in the untaken branch of a conditional.
2978 TF/08 TLS error reporting now respects the incoming_interface and
2979 incoming_port log selectors.
2981 TF/09 Produce a more useful error message if an SMTP transport's hosts
2982 setting expands to an empty string.
2984 NM/06 Bugzilla 744: EXPN did not work under TLS.
2985 Patch provided by Phil Pennock.
2987 NM/07 Bugzilla 769: Extraneous comma in usage fprintf
2988 Patch provided by Richard Godbee.
2990 NM/08 Fixed erroneous documentation references to smtp_notquit_acl to be
2991 acl_smtp_notquit, added index entry.
2993 NM/09 Bugzilla 787: Potential buffer overflow in string_format.
2994 Patch provided by Eugene Bujak.
2996 NM/10 Bugzilla 770: Problem on some platforms modifying the len parameter to
2997 accept(). Patch provided by Maxim Dounin.
2999 NM/11 Bugzilla 749: Preserve old behaviour of blanks comparing equal to zero.
3000 Patch provided by Phil Pennock.
3002 NM/12 Bugzilla 497: Correct behaviour of exiwhat when no config exists.
3004 NM/13 Bugzilla 590: Correct handling of Resent-Date headers.
3005 Patch provided by Brad "anomie" Jorsch.
3007 NM/14 Bugzilla 622: Added timeout setting to transport filter.
3008 Patch provided by Dean Brooks.
3010 TK/05 Add native DKIM support (does not depend on external libraries).
3012 NM/15 Bugzilla 854: Removed code that symlinks to pcre as its no longer useful.
3013 Patch provided by Graeme Fowler.
3015 NM/16 Bugzilla 851: Documentation example syntax fix.
3017 NM/17 Changed NOTICE file to remove references to embedded PCRE.
3019 NM/18 Bugzilla 894: Fix issue with very long lines including comments in
3022 NM/19 Bugzilla 745: TLS version reporting.
3023 Patch provided by Phil Pennock.
3025 NM/20 Bugzilla 167: bool: condition support.
3026 Patch provided by Phil Pennock.
3028 NM/21 Bugzilla 665: gnutls_compat_mode to allow compatibility with broken
3029 clients. Patch provided by Phil Pennock.
3031 NM/22 Bugzilla 607: prepend (not append) Resent-Message-ID and Resent-Date.
3032 Patch provided by Brad "anomie" Jorsch.
3034 NM/23 Bugzilla 687: Fix misparses in eximstats.
3035 Patch provided by Heiko Schlittermann.
3037 NM/24 Bugzilla 688: Fix exiwhat to handle log_selector = +pid.
3038 Patch provided by Heiko Schlittermann.
3040 NM/25 Bugzilla 727: Use transport mode as default mode for maildirsize file.
3041 plus update to original patch.
3043 NM/26 Bugzilla 799: Documentation correction for ratelimit.
3045 NM/27 Bugzilla 802: Improvements to local interface IP addr detection.
3046 Patch provided by David Brownlee.
3048 NM/28 Bugzilla 807: Improvements to LMTP delivery logging.
3050 NM/29 Bugzilla 862, 866, 875: Documentation bugfixes.
3052 NM/30 Bugzilla 888: TLS documentation bugfixes.
3054 NM/31 Bugzilla 896: Dovecot buffer overrun fix.
3056 NM/32 Bugzilla 889: Change all instances of "expr" in shell scripts to "expr --"
3057 Unlike the original bugzilla I have changed all shell scripts in src tree.
3059 NM/33 Bugzilla 898: Transport filter timeout fix.
3060 Patch by Todd Rinaldo.
3062 NM/34 Bugzilla 901: Fix sign/unsigned and UTF mismatches.
3063 Patch by Serge Demonchaux.
3065 NM/35 Bugzilla 39: Base64 decode bug fixes.
3066 Patch by Jakob Hirsch.
3068 NM/36 Bugzilla 909: Correct connect() call in dcc code.
3070 NM/37 Bugzilla 910: Correct issue with relaxed/simple handling.
3072 NM/38 Bugzilla 908: Removed NetBSD3 support as no longer needed.
3074 NM/39 Bugzilla 911: Fixed MakeLinks build script.
3080 TK/01 Add preliminary DKIM support. Currently requires a forked version of
3081 ALT-N's libdkim that I have put here:
3082 http://duncanthrax.net/exim-experimental/
3084 Note to Michael Haardt: I had to rename some vars in sieve.c. They
3085 were called 'true' and it seems that C99 defines that as a reserved
3086 keyword to be used with 'bool' variable types. That means you could
3087 not include C99-style headers which use bools without triggering
3088 build errors in sieve.c.
3090 NM/01 Bugzilla 592: --help option is handled incorrectly if exim is invoked
3091 as mailq or other aliases. Changed the --help handling significantly
3092 to do whats expected. exim_usage() emits usage/help information.
3094 SC/01 Added the -bylocaldomain option to eximstats.
3096 NM/02 Bugzilla 619: Defended against bad data coming back from gethostbyaddr.
3098 NM/03 Bugzilla 613: Documentation fix for acl_not_smtp.
3100 NM/04 Bugzilla 628: PCRE update to 7.4 (work done by John Hall).
3106 PH/01 Another patch from the Sieve maintainer.
3108 PH/02 When an IPv6 address is converted to a string for single-key lookup
3109 in an address list (e.g. for an item such as "net24-dbm;/net/works"),
3110 dots are used instead of colons so that keys in lsearch files need not
3111 contain colons. This was done some time before quoting was made available
3112 in lsearch files. However, iplsearch files do require colons in IPv6 keys
3113 (notated using the quote facility) so as to distinguish them from IPv4
3114 keys. This meant that lookups for IP addresses in host lists did not work
3115 for iplsearch lookups.
3117 This has been fixed by arranging for IPv6 addresses to be expressed with
3118 colons if the lookup type is iplsearch. This is not incompatible, because
3119 previously such lookups could never work.
3121 The situation is now rather anomalous, since one *can* have colons in
3122 ordinary lsearch keys. However, making the change in all cases is
3123 incompatible and would probably break a number of configurations.
3125 TK/01 Change PRVS address formatting scheme to reflect latests BATV draft
3128 MH/01 The "spam" ACL condition code contained a sscanf() call with a %s
3129 conversion specification without a maximum field width, thereby enabling
3130 a rogue spamd server to cause a buffer overflow. While nobody in their
3131 right mind would setup Exim to query an untrusted spamd server, an
3132 attacker that gains access to a server running spamd could potentially
3133 exploit this vulnerability to run arbitrary code as the Exim user.
3135 TK/02 Bugzilla 502: Apply patch to make the SPF-Received: header use
3136 $primary_hostname instead of what libspf2 thinks the hosts name is.
3138 MH/02 The dsearch lookup now uses lstat(2) instead of stat(2) to look for
3139 a directory entry by the name of the lookup key. Previously, if a
3140 symlink pointed to a non-existing file or a file in a directory that
3141 Exim lacked permissions to read, a lookup for a key matching that
3142 symlink would fail. Now it is enough that a matching directory entry
3143 exists, symlink or not. (Bugzilla 503.)
3145 PH/03 The body_linecount and body_zerocount variables are now exported in the
3148 PH/04 Added the $dnslist_matched variable.
3150 PH/05 Unset $tls_cipher and $tls_peerdn before making a connection as a client.
3151 This means they are set thereafter only if the connection becomes
3154 PH/06 Added the client_condition to authenticators so that some can be skipped
3155 by clients under certain conditions.
3157 PH/07 The error message for a badly-placed control=no_multiline_responses left
3158 "_responses" off the end of the name.
3160 PH/08 Added -Mvc to output a copy of a message in RFC 2822 format.
3162 PH/09 Tidied the code for creating ratelimiting keys, creating them explicitly
3163 (without spaces) instead of just copying the configuration text.
3165 PH/10 Added the /noupdate option to the ratelimit ACL condition.
3167 PH/11 Added $max_received_linelength.
3169 PH/12 Added +ignore_defer and +include_defer to host lists.
3171 PH/13 Installed PCRE version 7.2. This needed some changes because of the new
3172 way in which PCRE > 7.0 is built.
3174 PH/14 Implemented queue_only_load_latch.
3176 PH/15 Removed an incorrect (int) cast when reading the value of SIZE in a
3177 MAIL command. The effect was to mangle the value on 64-bit systems.
3179 PH/16 Another patch from the Sieve maintainer.
3181 PH/17 Added the NOTQUIT ACL, based on a patch from Ted Cooper.
3183 PH/18 If a system quota error occurred while trying to create the file for
3184 a maildir delivery, the message "Mailbox is full" was not appended to the
3185 bounce if the delivery eventually timed out. Change 4.67/27 below applied
3186 only to a quota excession during the actual writing of the file.
3188 PH/19 It seems that peer DN values may contain newlines (and other non-printing
3189 characters?) which causes problems in log lines. The DN values are now
3190 passed through string_printing() before being added to log lines.
3192 PH/20 Added the "servers=" facility to MySQL and PostgreSQL lookups. (Oracle
3193 and InterBase are left for another time.)
3195 PH/21 Added message_body_newlines option.
3197 PH/22 Guard against possible overflow in moan_check_errorcopy().
3199 PH/23 POSIX allows open() to be a macro; guard against that.
3201 PH/24 If the recipient of an error message contained an @ in the local part
3202 (suitably quoted, of course), incorrect values were put in $domain and
3203 $local_part during the evaluation of errors_copy.
3209 MH/01 Fix for bug #448, segfault in Dovecot authenticator when interface_address
3210 is unset (happens when testing with -bh and -oMi isn't used). Thanks to
3213 PH/01 Added a new log selector smtp_no_mail, to log SMTP sessions that do not
3214 issue a MAIL command.
3216 PH/02 In an ACL statement such as
3218 deny dnslists = X!=127.0.0.2 : X=127.0.0.2
3220 if a client was not listed at all, or was listed with a value other than
3221 127.0.0.2, in the X list, but was listed with 127.0.0.2 in the Y list,
3222 the condition was not true (as it should be), so access was not denied.
3223 The bug was that the ! inversion was incorrectly passed on to the second
3224 item. This has been fixed.
3226 PH/03 Added additional dnslists conditions == and =& which are different from
3227 = and & when the dns lookup returns more than one IP address.
3229 PH/04 Added gnutls_require_{kx,mac,protocols} to give more control over the
3230 cipher suites used by GnuTLS. These options are ignored by OpenSSL.
3232 PH/05 After discussion on the list, added a compile time option ENABLE_DISABLE_
3233 FSYNC, which compiles an option called disable_fsync that allows for
3234 bypassing fsync(). The documentation is heavily laced with warnings.
3236 SC/01 Updated eximstats to collate all SpamAssassin rejects into one bucket.
3238 PH/06 Some tidies to the infrastructure of the Test Suite that is concerned
3239 with the auxiliary C programs that it uses: (1) Arrange for BIND_8_COMPAT
3240 to be defined when compiling on OSX (Darwin); (2) Tidies to the Makefile,
3241 including adding "make clean"; (3) Added -fPIC when compiling the test
3242 dynamically loaded module, to get rid of a warning.
3244 MH/02 Fix for bug #451, causing paniclog entries to be written if a bounce
3245 message fails, move_frozen_messages = true and ignore_bounce_errors_after
3246 = 0s. The bug is otherwise harmless.
3248 PH/07 There was a bug in the dovecot authenticator such that the value of
3249 $auth1 could be overwritten, and so not correctly preserved, after a
3250 successful authentication. This usually meant that the value preserved by
3251 the server_setid option was incorrect.
3253 PH/08 Added $smtp_count_at_connection_start, deliberately with a long name.
3255 PH/09 Installed PCRE release 7.0.
3257 PH/10 The acl_not_smtp_start ACL was, contrary to the documentation, not being
3258 run for batched SMTP input. It is now run at the start of every message
3259 in the batch. While fixing this I discovered that the process information
3260 (output by running exiwhat) was not always getting set for -bs and -bS
3261 input. This is fixed, and it now also says "batched" for BSMTP.
3263 PH/11 Added control=no_pipelining.
3265 PH/12 Added $sending_ip_address and $sending_port (mostly Magnus Holmgren's
3266 patch, slightly modified), and move the expansion of helo_data till after
3267 the connection is made in the smtp transport (so it can use these
3270 PH/13 Added ${rfc2047d: to decoded RFC 2047 strings.
3272 PH/14 Added log_selector = +pid.
3274 PH/15 Flush SMTP output before delaying, unless control=no_delay_flush is set.
3276 PH/16 Add ${if forany and ${if forall.
3278 PH/17 Added dsn_from option to vary the From: line in DSNs.
3280 PH/18 Flush SMTP output before performing a callout, unless control =
3281 no_callout_flush is set.
3283 PH/19 Change 4.64/PH/36 introduced a bug: when address_retry_include_sender
3284 was true (the default) a successful delivery failed to delete the retry
3285 item, thus causing premature timeout of the address. The bug is now
3288 PH/20 Added hosts_avoid_pipelining to the smtp transport.
3290 PH/21 Long custom messages for fakedefer and fakereject are now split up
3291 into multiline responses in the same way that messages for "deny" and
3292 other ACL rejections are.
3294 PH/22 Applied Jori Hamalainen's speed-up changes and typo fixes to exigrep,
3295 with slight modification.
3297 PH/23 Applied sieve patches from the maintainer "tracking the latest notify
3298 draft, changing the syntax and factoring some duplicate code".
3300 PH/24 When the log selector "outgoing_port" was set, the port was shown as -1
3301 for deliveries of the second and subsequent messages over the same SMTP
3304 PH/25 Applied Magnus Holmgren's patch for ${addresses, ${map, ${filter, and
3305 ${reduce, with only minor "tidies".
3307 SC/02 Applied Daniel Tiefnig's patch to improve the '($parent) =' pattern match.
3309 PH/26 Added a "continue" ACL modifier that does nothing, for the benefit of its
3310 expansion side effects.
3312 PH/27 When a message times out after an over-quota error from an Exim-imposed
3313 quota, the bounce message says "mailbox is full". This message was not
3314 being given when it was a system quota that was exceeded. It now should
3317 MH/03 Made $recipients available in local_scan(). local_scan() already has
3318 better access to the recipient list through recipients_list[], but
3319 $recipients can be useful in postmaster-provided expansion strings.
3321 PH/28 The $smtp_command and $smtp_command_argument variables were not correct
3322 in the case of a MAIL command with additional options following the
3323 address, for example: MAIL FROM:<foo@bar> SIZE=1234. The option settings
3324 were accidentally chopped off.
3326 PH/29 SMTP synchronization checks are implemented when a command is read -
3327 there is a check that no more input is waiting when there shouldn't be
3328 any. However, for some commands, a delay in an ACL can mean that it is
3329 some time before the response is written. In this time, more input might
3330 arrive, invalidly. So now there are extra checks after an ACL has run for
3331 HELO/EHLO and after the predata ACL, and likewise for MAIL and RCPT when
3332 pipelining has not been advertised.
3334 PH/30 MH's patch to allow iscntrl() characters to be list separators.
3336 PH/31 Unlike :fail:, a custom message specified with :defer: was not being
3337 returned in the SMTP response when smtp_return_error_details was false.
3338 This has been fixed.
3340 PH/32 Change the Dovecot authenticator to use read() and write() on the socket
3341 instead of the C I/O that was originally supplied, because problems were
3342 reported on Solaris.
3344 PH/33 Compile failed with OpenSSL 0.9.8e. This was due to a coding error in
3345 Exim which did not show up earlier: it was assuming that a call to
3346 SSL_CTX_set_info_callback() might give an error value. In fact, there is
3347 no error. In previous releases of OpenSSL, SSL_CTX_set_info_callback()
3348 was a macro that became an assignment, so it seemed to work. This has
3349 changed to a proper function call with a void return, hence the compile
3350 error. Exim's code has been fixed.
3352 PH/34 Change HDA_SIZE in oracle.c from 256 to 512. This is needed for 64-bit
3355 PH/35 Applied a patch from the Sieve maintainer which fixes a bug in "notify".
3357 PH/36 Applied John Jetmore's patch to add -v functionality to exigrep.
3359 PH/37 If a message is not accepted after it has had an id assigned (e.g.
3360 because it turns out to be too big or there is a timeout) there is no
3361 "Completed" line in the log. When some messages of this type were
3362 selected by exigrep, they were listed as "not completed". Others were
3363 picked up by some special patterns. I have improved the selection
3364 criteria to be more general.
3366 PH/38 The host_find_failed option in the manualroute router can now be set
3367 to "ignore", to completely ignore a host whose IP address cannot be
3368 found. If all hosts are ignored, the behaviour is controlled by the new
3369 host_all_ignored option.
3371 PH/39 In a list of hosts for manualroute, if one item (either because of multi-
3372 homing or because of multiple MX records with /mx) generated more than
3373 one IP address, and the following item turned out to be the local host,
3374 all the secondary addresses of the first item were incorrectly removed
3375 from the list, along with the local host and any following hosts (which
3376 is what is supposed to happen).
3378 PH/40 When Exim receives a message, it writes the login name, uid, and gid of
3379 whoever called Exim into the -H file. In the case of the daemon it was
3380 behaving confusingly. When first started, it used values for whoever
3381 started the daemon, but after a SIGHUP it used the Exim user (because it
3382 calls itself on a restart). I have changed the code so that it now always
3385 PH/41 (Following a suggestion from Tony Finch) If all the RCPT commands in a
3386 message are rejected with the same error (e.g. no authentication or bad
3387 sender address), and a DATA command is nevertheless sent (as can happen
3388 with PIPELINING or a stupid MUA), the error message that was given to the
3389 RCPT commands is included in the rejection of the DATA command. This is
3390 intended to be helpful for MUAs that show only the final error to their
3393 PH/42 Another patch from the Sieve maintainer.
3395 SC/02 Eximstats - Differentiate between permanent and temporary rejects.
3396 Eximstats - Fixed some broken HTML links and added missing column headers
3398 Eximstats - Fixed Grand Total Summary Domains, Edomains, and Email
3399 columns for Rejects, Temp Rejects, Ham, and Spam rows.
3401 SC/03 Eximstats - V1.58 Fix to get <> and blackhole to show in edomain tables.
3403 PH/43 Yet another patch from the Sieve maintainer.
3405 PH/44 I found a way to check for a TCP/IP connection going away before sending
3406 the response to the final '.' that terminates a message, but only in the
3407 case where the client has not sent further data following the '.'
3408 (unfortunately, this is allowed). However, in many cases there won't be
3409 any further data because there won't be any more messages to send. A call
3410 to select() can be used: if it shows that the input is "ready", there is
3411 either input waiting, or the socket has been closed. An attempt to read
3412 the next input character can distinguish the two cases. Previously, Exim
3413 would have sent an OK response which the client would never have see.
3414 This could lead to message repetition. This fix should cure that, at
3415 least in a lot of common cases.
3417 PH/45 Do not advertise STARTTLS in response to HELP unless it would be
3418 advertised in response to EHLO.
3424 PH/01 Two more bugs that were introduced by 4.64/PH/07, in addition to the one
3425 fixed by 4.65/MH/01 (is this a record?) are fixed:
3427 (i) An empty string was always treated as zero by the numeric comparison
3428 operators. This behaviour has been restored.
3430 (ii) It is documented that the numeric comparison operators always treat
3431 their arguments as decimal numbers. This was broken in that numbers
3432 starting with 0 were being interpreted as octal.
3434 While fixing these problems I realized that there was another issue that
3435 hadn't been noticed. Values of message_size_limit (both the global option
3436 and the transport option) were treated as octal if they started with 0.
3437 The documentation was vague. These values are now always treated as
3438 decimal, and I will make that clear in the documentation.
3444 TK/01 Disable default definition of HAVE_LINUX_SENDFILE. Clashes with
3445 Linux large file support (_FILE_OFFSET_BITS=64) on older glibc
3448 MH/01 Don't check that the operands of numeric comparison operators are
3449 integers when their expansion is in "skipping" mode (fixes bug
3450 introduced by 4.64-PH/07).
3452 PH/01 If a system filter or a router generates more than SHRT_MAX (32767)
3453 child addresses, Exim now panics and dies. Previously, because the count
3454 is held in a short int, deliveries were likely to be lost. As such a
3455 large number of recipients for a single message is ridiculous
3456 (performance will be very, very poor), I have chosen to impose a limit
3457 rather than extend the field.
3463 TK/01 Bugzilla #401. Fix DK spooling code so that it can overwrite a
3464 leftover -K file (the existence of which was triggered by #402).
3465 While we were at it, introduced process PID as part of the -K
3466 filename. This should rule out race conditions when creating
3469 TK/02 Bugzilla #402. Apply patch from Simon Arlott, speeding up DK signing
3470 processing considerably. Previous code took too long for large mails,
3471 triggering a timeout which in turn triggers #401.
3473 TK/03 Introduced HAVE_LINUX_SENDFILE to os.h-Linux. Currently only used
3474 in the DK code in transports.c. sendfile() is not really portable,
3475 hence the _LINUX specificness.
3477 TF/01 In the add_headers option to the mail command in an Exim filter,
3478 there was a bug that Exim would claim a syntax error in any
3479 header after the first one which had an odd number of characters
3482 PH/01 If a server that rejects MAIL FROM:<> was the target of a sender
3483 callout verification, Exim cached a "reject" for the entire domain. This
3484 is correct for most verifications, but it is not correct for a recipient
3485 verification with use_sender or use_postmaster set, because in that case
3486 the callout does not use MAIL FROM:<>. Exim now distinguishes the special
3487 case of MAIL FROM:<> rejection from other early rejections (e.g.
3488 rejection of HELO). When verifying a recipient using a non-null MAIL
3489 address, the cache is ignored if it shows MAIL FROM:<> rejection.
3490 Whatever the result of the callout, the value of the domain cache is
3491 left unchanged (for any other kind of callout, getting as far as trying
3492 RCPT means that the domain itself is ok).
3494 PH/02 Tidied a number of unused variable and signed/unsigned warnings that
3497 PH/03 On Solaris, an unexpectedly close socket (dropped connection) can
3498 manifest itself as EPIPE rather than ECONNECT. When tidying away a
3499 session, the daemon ignores ECONNECT errors and logs others; it now
3500 ignores EPIPE as well.
3502 PH/04 Applied Nico Erfurth's refactoring patch to tidy up mime.c
3503 (quoted-printable decoding).
3505 PH/05 Applied Nico Erfurth's refactoring patch to tidy up spool_mbox.c, and
3506 later the small subsequent patch to fix an introduced bug.
3508 PH/06 Installed the latest Cygwin Makefile from the Cygwin maintainer.
3510 PH/07 There was no check for overflow in expansions such as ${if >{1}{4096M}}.
3512 PH/08 An error is now given if message_size_limit is specified negative.
3514 PH/09 Applied and tidied up Jakob Hirsch's patch for allowing ACL variables
3515 to be given (somewhat) arbitrary names.
3517 JJ/01 exipick 20060919.0, allow for arbitrary acl_ variables introduced
3520 JJ/02 exipick 20060919.0, --show-vars args can now be regular expressions,
3521 miscellaneous code fixes
3523 PH/10 Added the log_reject_target ACL modifier to specify where to log
3526 PH/11 Callouts were setting the name used for EHLO/HELO from $smtp_active_
3527 hostname. This is wrong, because it relates to the incoming message (and
3528 probably the interface on which it is arriving) and not to the outgoing
3529 callout (which could be using a different interface). This has been
3530 changed to use the value of the helo_data option from the smtp transport
3531 instead - this is what is used when a message is actually being sent. If
3532 there is no remote transport (possible with a router that sets up host
3533 addresses), $smtp_active_hostname is used.
3535 PH/12 Installed Andrey Panin's patch to add a dovecot authenticator. Various
3536 tweaks were necessary in order to get it to work (see also 21 below):
3537 (a) The code assumed that strncpy() returns a negative number on buffer
3538 overflow, which isn't the case. Replaced with Exim's string_format()
3540 (b) There were several signed/unsigned issues. I just did the minimum
3541 hacking in of casts. There is scope for a larger refactoring.
3542 (c) The code used strcasecmp() which is not a standard C function.
3543 Replaced with Exim's strcmpic() function.
3544 (d) The code set only $1; it now sets $auth1 as well.
3545 (e) A simple test gave the error "authentication client didn't specify
3546 service in request". It would seem that Dovecot has changed its
3547 interface. Fortunately there's a specification; I followed it and
3548 changed what the client sends and it appears to be working now.
3550 PH/13 Added $message_headers_raw to provide the headers without RFC 2047
3553 PH/14 Corrected misleading output from -bv when -v was also used. Suppose the
3554 address A is aliased to B and C, where B exists and C does not. Without
3555 -v the output is "A verified" because verification stops after a
3556 successful redirection if more than one address is generated. However,
3557 with -v the child addresses are also verified. Exim was outputting "A
3558 failed to verify" and then showing the successful verification for C,
3559 with its parentage. It now outputs "B failed to verify", showing B's
3560 parentage before showing the successful verification of C.
3562 PH/15 Applied Michael Deutschmann's patch to allow DNS black list processing to
3563 look up a TXT record in a specific list after matching in a combined
3566 PH/16 It seems that the options setting for the resolver (RES_DEFNAMES and
3567 RES_DNSRCH) can affect the behaviour of gethostbyname() and friends when
3568 they consult the DNS. I had assumed they would set it the way they
3569 wanted; and indeed my experiments on Linux seem to show that in some
3570 cases they do (I could influence IPv6 lookups but not IPv4 lookups).
3571 To be on the safe side, however, I have now made the interface to
3572 host_find_byname() similar to host_find_bydns(), with an argument
3573 containing the DNS resolver options. The host_find_byname() function now
3574 sets these options at its start, just as host_find_bydns() does. The smtp
3575 transport options dns_qualify_single and dns_search_parents are passed to
3576 host_find_byname() when gethostbyname=TRUE in this transport. Other uses
3577 of host_find_byname() use the default settings of RES_DEFNAMES
3578 (qualify_single) but not RES_DNSRCH (search_parents).
3580 PH/17 Applied (a modified version of) Nico Erfurth's patch to make
3581 spool_read_header() do less string testing, by means of a preliminary
3582 switch on the second character of optional "-foo" lines. (This is
3583 overdue, caused by the large number of possibilities that now exist.
3584 Originally there were few.) While I was there, I also converted the
3585 str(n)cmp tests so they don't re-test the leading "-" and the first
3586 character, in the hope this might squeeze out yet more improvement.
3588 PH/18 Two problems with "group" syntax in header lines when verifying: (1) The
3589 flag allowing group syntax was set by the header_syntax check but not
3590 turned off, possible causing trouble later; (2) The flag was not being
3591 set at all for the header_verify test, causing "group"-style headers to
3592 be rejected. I have now set it in this case, and also caused header_
3593 verify to ignore an empty address taken from a group. While doing this, I
3594 came across some other cases where the code for allowing group syntax
3595 while scanning a header line wasn't quite right (mostly, not resetting
3596 the flag correctly in the right place). These bugs could have caused
3597 trouble for malformed header lines. I hope it is now all correct.
3599 PH/19 The functions {pwcheck,saslauthd}_verify_password() are always called
3600 with the "reply" argument non-NULL. The code, however (which originally
3601 came from elsewhere) had *some* tests for NULL when it wrote to *reply,
3602 but it didn't always do it. This confused somebody who was copying the
3603 code for some other use. I have removed all the tests.
3605 PH/20 It was discovered that the GnuTLS code had support for RSA_EXPORT, a
3606 feature that was used to support insecure browsers during the U.S. crypto
3607 embargo. It requires special client support, and Exim is probably the
3608 only MTA that supported it -- and would never use it because real RSA is
3609 always available. This code has been removed, because it had the bad
3610 effect of slowing Exim down by computing (never used) parameters for the
3611 RSA_EXPORT functionality.
3613 PH/21 On the advice of Timo Sirainen, added a check to the dovecot
3614 authenticator to fail if there's a tab character in the incoming data
3615 (there should never be unless someone is messing about, as it's supposed
3616 to be base64-encoded). Also added, on Timo's advice, the "secured" option
3617 if the connection is using TLS or if the remote IP is the same as the
3618 local IP, and the "valid-client-cert option" if a client certificate has
3621 PH/22 As suggested by Dennis Davis, added a server_condition option to *all*
3622 authenticators. This can be used for authorization after authentication
3623 succeeds. (In the case of plaintext, it servers for both authentication
3626 PH/23 Testing for tls_required and lost_connection in a retry rule didn't work
3627 if any retry times were supplied.
3629 PH/24 Exim crashed if verify=helo was activated during an incoming -bs
3630 connection, where there is no client IP address to check. In this
3631 situation, the verify now always succeeds.
3633 PH/25 Applied John Jetmore's -Mset patch.
3635 PH/26 Added -bem to be like -Mset, but loading a message from a file.
3637 PH/27 In a string expansion for a processed (not raw) header when multiple
3638 headers of the same name were present, leading whitespace was being
3639 removed from all of them, but trailing whitespace was being removed only
3640 from the last one. Now trailing whitespace is removed from each header
3641 before concatenation. Completely empty headers in a concatenation (as
3642 before) are ignored.
3644 PH/28 Fixed bug in backwards-compatibility feature of PH/09 (thanks to John
3645 Jetmore). It would have mis-read ACL variables from pre-4.61 spool files.
3647 PH/29 [Removed. This was a change that I later backed out, and forgot to
3648 correct the ChangeLog entry (that I had efficiently created) before
3649 committing the later change.]
3651 PH/30 Exim was sometimes attempting to deliver messages that had suffered
3652 address errors (4xx response to RCPT) over the same connection as other
3653 messages routed to the same hosts. Such deliveries are always "forced",
3654 so retry times are not inspected. This resulted in far too many retries
3655 for the affected addresses. The effect occurred only when there were more
3656 hosts than the hosts_max_try setting in the smtp transport when it had
3657 the 4xx errors. Those hosts that it had tried were not added to the list
3658 of hosts for which the message was waiting, so if all were tried, there
3659 was no problem. Two fixes have been applied:
3661 (i) If there are any address or message errors in an SMTP delivery, none
3662 of the hosts (tried or untried) are now added to the list of hosts
3663 for which the message is waiting, so the message should not be a
3664 candidate for sending over the same connection that was used for a
3665 successful delivery of some other message. This seems entirely
3666 reasonable: after all the message is NOT "waiting for some host".
3667 This is so "obvious" that I'm not sure why it wasn't done
3668 previously. Hope I haven't missed anything, but it can't do any
3669 harm, as the worst effect is to miss an optimization.
3671 (ii) If, despite (i), such a delivery is accidentally attempted, the
3672 routing retry time is respected, so at least it doesn't keep
3673 hammering the server.
3675 PH/31 Installed Andrew Findlay's patch to close the writing end of the socket
3676 in ${readsocket because some servers need this prod.
3678 PH/32 Added some extra debug output when updating a wait-xxx database.
3680 PH/33 The hint "could be header name not terminated by colon", which has been
3681 given for certain expansion errors for a long time, was not being given
3682 for the ${if def:h_colon_omitted{... case.
3684 PH/34 The spec says: "With one important exception, whenever a domain list is
3685 being scanned, $domain contains the subject domain." There was at least
3686 one case where this was not true.
3688 PH/35 The error "getsockname() failed: connection reset by peer" was being
3689 written to the panic log as well as the main log, but it isn't really
3690 panic-worthy as it just means the connection died rather early on. I have
3691 removed the panic log writing for the ECONNRESET error when getsockname()
3694 PH/36 After a 4xx response to a RCPT error, that address was delayed (in queue
3695 runs only) independently of the message's sender address. This meant
3696 that, if the 4xx error was in fact related to the sender, a different
3697 message to the same recipient with a different sender could confuse
3698 things. In particular, this can happen when sending to a greylisting
3699 server, but other circumstances could also provoke similar problems.
3700 I have changed the default so that the retry time for these errors is now
3701 based a combination of the sender and recipient addresses. This change
3702 can be overridden by setting address_retry_include_sender=false in the
3705 PH/37 For LMTP over TCP/IP (the smtp transport), error responses from the
3706 remote server are returned as part of bounce messages. This was not
3707 happening for LMTP over a pipe (the lmtp transport), but now it is the
3708 same for both kinds of LMTP.
3710 PH/38 Despite being documented as not happening, Exim was rewriting addresses
3711 in header lines that were in fact CNAMEs. This is no longer the case.
3713 PH/39 If -R or -S was given with -q<time>, the effect of -R or -S was ignored,
3714 and queue runs started by the daemon processed all messages. This has
3715 been fixed so that -R and -S can now usefully be given with -q<time>.
3717 PH/40 Import PCRE release 6.7 (fixes some bugs).
3719 PH/41 Add bitwise logical operations to eval (courtesy Brad Jorsch).
3721 PH/42 Give an error if -q is specified more than once.
3723 PH/43 Renamed the variables $interface_address and $interface_port as
3724 $received_ip_address and $received_port, to make it clear that these
3725 values apply to message reception, and not to the outgoing interface when
3726 a message is delivered. (The old names remain recognized, of course.)
3728 PH/44 There was no timeout on the connect() call when using a Unix domain
3729 socket in the ${readsocket expansion. There now is.
3731 PH/45 Applied a modified version of Brad Jorsch's patch to allow "message" to
3732 be meaningful with "accept".
3734 SC/01 Eximstats V1.43
3735 Bug fix for V1.42 with -h0 specified. Spotted by Chris Lear.
3737 SC/02 Eximstats V1.44
3738 Use a glob alias rather than an array ref in the generated
3739 parser. This improves both readability and performance.
3741 SC/03 Eximstats V1.45 (Marco Gaiarin / Steve Campbell)
3742 Collect SpamAssassin and rejection statistics.
3743 Don't display local sender or destination tables unless
3744 there is data to show.
3745 Added average volumes into the top table text output.
3747 SC/04 Eximstats V1.46
3748 Collect data on the number of addresses (recipients)
3749 as well as the number of messages.
3751 SC/05 Eximstats V1.47
3752 Added 'Message too big' to the list of mail rejection
3753 reasons (thanks to Marco Gaiarin).
3755 SC/06 Eximstats V1.48
3756 Mainlog lines which have GMT offsets and are too short to
3757 have a flag are now skipped.
3759 SC/07 Eximstats V1.49 (Alain Williams)
3760 Added the -emptyok flag.
3762 SC/08 Eximstats V1.50
3763 Fixes for obtaining the IP address from reject messages.
3765 JJ/03 exipick.20061117.2, made header handling as similar to exim as possible
3766 (added [br]h_ prefixes, implemented RFC2047 decoding. Fixed
3767 whitespace changes from 4.64-PH/27
3769 JJ/04 exipick.20061117.2, fixed format and added $message_headers_raw to
3772 JJ/05 exipick.20061117.2, bug fixes (error out sooner when invalid criteria
3773 are found, allow negative numbers in numeric criteria)
3775 JJ/06 exipick.20061117.2, added new $message_body_missing variable
3777 JJ/07 exipick.20061117.2, added $received_ip_address and $received_port
3778 to match changes made in 4.64-PH/43
3780 PH/46 Applied Jori Hamalainen's patch to add features to exiqsumm.
3782 PH/47 Put in an explicit test for a DNS lookup of an address record where the
3783 "domain" is actually an IP address, and force a failure. This locks out
3784 those revolvers/nameservers that support "A-for-A" lookups, in
3785 contravention of the specifications.
3787 PH/48 When a host name was looked up from an IP address, and the subsequent
3788 forward lookup of the name timed out, the host name was left in
3789 $sender_host_name, contrary to the specification.
3791 PH/49 Although default lookup types such as lsearch* or cdb*@ have always been
3792 restricted to single-key lookups, Exim was not diagnosing an error if
3793 * or *@ was used with a query-style lookup.
3795 PH/50 Increased the value of DH_BITS in tls-gnu.c from 768 to 1024.
3797 MH/01 local_scan ABI version incremented to 1.1. It should have been updated
3798 long ago, but noone interested enough thought of it. Let's just say that
3799 the "1.1" means that there are some new functions that weren't there at
3800 some point in the past.
3802 PH/51 Error processing for expansion failure of helo_data from an smtp
3803 transport during callout processing was broken.
3805 PH/52 Applied John Jetmore's patch to allow tls-on-connect and STARTTLS to be
3806 tested/used via the -bh/-bhc/-bs options.
3808 PH/53 Added missing "#include <time.h>" to pcre/pcretest.c (this was a PCRE
3809 bug, fixed in subsequent PCRE releases).
3811 PH/54 Applied Robert Bannocks' patch to avoid a problem with references that
3812 arises when using the Solaris LDAP libraries (but not with OpenLDAP).
3814 PH/55 Check for a ridiculously long file name in exim_dbmbuild.
3820 SC/01 Use a glob alias rather than an array ref in eximstats generated
3821 parser. This improves both readability and performance.
3823 SC/02 Collect SpamAssassin and rejection statistics in eximstats.
3824 Don't display local sender or destination tables in eximstats unless
3825 there is data to show.
3826 Added average volumes into the eximstats top table text output.
3828 SC/03 Collect data on the number of addresses (recipients) as well
3829 as the number of messages in eximstats.
3831 TF/01 Correct an error in the documentation for the redirect router. Exim
3832 does (usually) call initgroups() when daemonizing.
3834 TF/02 Call initgroups() when dropping privilege in exim.c, so that Exim runs
3835 with consistent privilege compared to when running as a daemon.
3837 TF/03 Note in the spec that $authenticated_id is not set for local
3838 submissions from trusted users.
3840 TF/04 The ratelimit per_rcpt option now works correctly in acl_not_smtp.
3841 Thanks to Dean Brooks <dean@iglou.com> for the patch.
3843 TF/05 Make it easier to get SMTP authentication and TLS/SSL support working
3844 by adding some example configuration directives to the default
3845 configuration file. A little bit of work is required to uncomment the
3846 directives and define how usernames and passwords are checked, but
3847 there is now a framework to start from.
3849 PH/01 Added #define LDAP_DEPRECATED 1 to ldap.c because some of the "old"
3850 functions that Exim currently uses aren't defined in ldap.h for OpenLDAP
3851 without this. I don't know how relevant this is to other LDAP libraries.
3853 PH/02 Add the verb name to the "unknown ACL verb" error.
3855 PH/03 Magnus Holmgren's patch for filter_prepend_home.
3857 PH/03 Fixed Bugzilla #101: macro definition between ACLs doesn't work.
3859 PH/04 Applied Magnus Holmgren's patch to fix Bugzilla #98: transport's home
3860 directory not expanded when it should be if an expanded home directory
3861 was set for the address (which is overridden by the transport).
3863 PH/05 Applied Alex Kiernan's patch to fix Bugzilla #99: a problem with
3866 PH/06 Added acl_not_smtp_start, based on Johannes Berg's patch, and set the
3867 bit to forbid control=suppress_local_fixups in the acl_not_smtp ACL,
3868 because it is too late at that time, and has no effect.
3870 PH/07 Changed ${quote_pgsql to quote ' as '' instead of \' because of a
3871 security issue with \' (bugzilla #107). I could not use the
3872 PQescapeStringConn() function, because it needs a PGconn value as one of
3875 PH/08 When testing addresses using -bt, indicate those final addresses that
3876 are duplicates that would not cause an additional delivery. At least one
3877 person was confused, thinking that -bt output corresponded to deliveries.
3878 (Suppressing duplicates isn't a good idea as you lose the information
3879 about possibly different redirections that led to the duplicates.)
3881 PH/09 Applied patch from Erik to use select() instead of poll() in spam.c on
3882 systems where poll() doesn't work, in particular OS X.
3884 PH/10 Added more information to debugging output for retry time not reached.
3886 PH/11 Applied patch from Arkadiusz Miskiewicz to apply a timeout to read
3887 operations in malware.c.
3889 PH/12 Applied patch from Magnus Holmgren to include the "h" tag in Domain Keys
3892 PH/13 If write_rejectlog was set false when logging was sent to syslog with
3893 syslog_duplication set false, log lines that would normally be written
3894 both the the main log and to the reject log were not written to syslog at
3897 PH/14 In the default configuration, change the use of "message" in ACL warn
3898 statements to "add_header".
3900 PH/15 Diagnose a filter syntax error for "seen", "unseen", or "noerror" if not
3901 not followed by a command (e.g. "seen endif").
3903 PH/16 Recognize SMTP codes at the start of "message" in ACLs and after :fail:
3904 and :defer: in a redirect router. Add forbid_smtp_code to suppress the
3907 PH/17 Added extra conditions to the default value of delay_warning_condition
3911 { !eq{$h_list-id:$h_list-post:$h_list-subscribe:}{} } \
3912 { match{$h_precedence:}{(?i)bulk|list|junk} } \
3913 { match{$h_auto-submitted:}{(?i)auto-generated|auto-replied} } \
3916 The Auto-Submitted: and various List- headers are standardised, whereas I
3917 don't think Precedence: ever was.
3919 PH/18 Refactored debugging code in route_finduser() to show more information,
3920 in particular, the error code if getpwnam() issues one.
3922 PH/19 Added PQsetClientEncoding(conn, "SQL_ASCII") to the pgsql code module.
3923 This is apparently needed in addition to the PH/07 change above to avoid
3924 any possible encoding problems.
3926 PH/20 Perl can change the locale. Exim was resetting it after a ${perl call,
3927 but not after initializing Perl.
3929 PH/21 Added a call to PQsetNoticeProcessor() to catch pgsql "notices" and
3930 output them only if debugging. By default they are written stderr,
3931 apparently, which is not desirable.
3933 PH/22 Added Alain Williams' LDAP patch to support setting REFERRALS=off on
3936 JJ/01 exipick: added --reverse (and -R synonym), --random, --size, --sort and
3939 JJ/02 exipick: rewrote --help documentation to hopefully make more clear.
3941 PH/23 Made -oMaa and -oMt work with -bh and -bs to pretend the connection is
3942 authenticated or an ident call has been made. Suppress the default
3943 values for $authenticated_id and $authenticated_sender (but permit -oMai
3944 and -oMas) when testing with -bh.
3946 PH/24 Re-jigged the order of the tests in the default configuration so that the
3947 tests for valid domains and recipients precede the DNS black list and CSA
3948 tests, on the grounds that those ones are more expensive.
3950 PH/25 Exim was not testing for a space following SMTP commands such as EHLO
3951 that require one. Thus, EHLORHUBARB was interpreted as a valid command.
3952 This bug exists in every version of Exim that I still have, right back to
3955 PH/26 (n)wildlsearch lookups are documented as being done case-insensitively.
3956 However, an attempt to turn on case-sensitivity in a regex key by
3957 including (?-i) didn't work because the subject string was already
3958 lowercased, and the effects were non-intuitive. It turns out that a
3959 one-line patch can be used to allow (?-i) to work as expected.
3965 TF/01 Fix the add_header change below (4.61 PH/55) which had a bug that (amongst
3966 other effects) broke the use of negated acl sub-conditions.
3968 PH/01 ${readsocket now supports Internet domain sockets (modified John Jetmore
3971 PH/02 When tcp-wrappers is called from Exim, it returns only "deny" or "allow".
3972 "Deny" causes Exim to reject the incoming connection with a 554 error.
3973 Unfortunately, if there is a major crisis, such as a disk failure,
3974 tcp-wrappers gives "deny", whereas what one would like would be some
3975 kind of temporary error. A kludge has been added to help with this.
3976 Before calling hosts_ctl(), errno is set zero. If the result is "deny", a
3977 554 error is used if errno is still zero or contains ENOENT (which occurs
3978 if either of the /etc/hosts.{allow,deny} files is missing). Otherwise, a
3981 PH/03 Add -lutil to the default FreeBSD LIBS setting.
3983 PH/04 Change PH/19 for 4.61 was too wide. It should not be applied to host
3984 errors. Otherwise a message that provokes a temporary error (when other
3985 messages do not) can cause a whole host to time out.
3987 PH/05 Batch deliveries by appendfile and pipe transports did not work when the
3988 addresses were routed directly to files or pipes from a redirect router.
3989 File deliveries just didn't batch; pipe deliveries might have suffered
3992 PH/06 A failure to get a lock for a hints database would erroneously always say
3993 "Failed to get write lock", even when it was really a read lock.
3995 PH/07 The appendfile transport was creating MBX lock files with a fixed mode
3996 of 0600. This has been changed to use the value of the lockfile_mode
3997 option (which defaults to 0600).
3999 PH/08 Applied small patch from the Sieve maintainer.
4001 PH/09 If maildir_quota_directory_regex was set to exclude (say) the .Trash
4002 folder from quota calculations, a direct delivery into this folder messed
4003 up the contents of the maildirsize file. This was because the regex was
4004 used only to exclude .Trash (or whatever) when the size of the mailbox
4005 was calculated. There was no check that a delivery was happening into an
4006 excluded directory. This bug has been fixed by ignoring all quota
4007 processing for deliveries into excluded directories.
4009 PH/10 Added the maildirfolder_create_regex option to appendfile.
4015 PH/01 The code for finding all the local interface addresses on a FreeBSD
4016 system running IPv6 was broken. This may well have applied to all BSD
4017 systems, as well as to others that have similar system calls. The broken
4018 code found IPv4 interfaces correctly, but gave incorrect values for the
4019 IPv6 interfaces. In particular, ::1 was not found. The effect in Exim was
4020 that it would not match correctly against @[] and not recognize the IPv6
4023 PH/02 The ipliteral router was not recognizing addresses of the form user@
4024 [ipv6:....] because it didn't know about the "ipv6:" prefix.
4026 PH/03 Added disable_ipv6.
4028 PH/04 Changed $reply_address to use the raw form of the headers instead of the
4029 decoded form, because it is most often used to construct To: headers
4030 lines in autoreplies, and the decoded form may well be syntactically
4031 invalid. However, $reply_address has leading white space removed, and all
4032 newlines turned into spaces so that the autoreply transport does not
4035 PH/05 If group was specified without a user on a router, and no group or user
4036 was specified on a transport, the group from the router was ignored.
4038 PH/06 Increased the number of ACL variables to 20 of each type, and arranged
4039 for visible compile-time settings that can be used to change these
4040 numbers, for those that want even more. Backwards compatibility with old
4041 spool files has been maintained. However, going back to a previous Exim
4042 release will lost any variables that are in spool files.
4044 PH/07 Two small changes when running in the test harness: increase delay when
4045 passing a TCP/IP connection to a new process, in case the original
4046 process has to generate a bounce, and remove special handling of
4047 127.0.0.2 (sic), which is no longer necessary.
4049 PH/08 Changed debug output of dbfn_open() flags from numbers to names, so as to
4050 be the same on different OS.
4052 PH/09 Moved a debug statement in filter processing to avoid a race problem when
4055 JJ/01 exipick: fixed bug where -b (brief) output option showed "Vars:"
4056 whether --show-vars was specified or not
4058 JJ/02 exipick: Added support for new ACL variable spool format introduced
4061 PH/10 Fixed another bug related to PH/04 above: if an incoming message had a
4062 syntactically invalid From: or Reply-to: line, and a filter used this to
4063 generate an autoreply, and therefore failed to obtain an address for the
4064 autoreply, Exim could try to deliver to a non-existent relative file
4065 name, causing unrelated and misleading errors. What now happens is that
4066 it logs this as a hard delivery error, but does not attempt to create a
4069 PH/11 The exinext utility has a -C option for testing purposes, but although
4070 the given file was scanned by exinext itself; it wasn't being passed on
4071 when Exim was called.
4073 PH/12 In the smtp transport, treat an explicit ECONNRESET error the same as
4074 an end-of-file indication when reading a command response.
4076 PH/13 Domain literals for IPv6 were not recognized unless IPv6 support was
4077 compiled. In many other places in Exim, IPv6 addresses are always
4078 recognized, so I have changed this. It also means that IPv4 domain
4079 literals of the form [IPV4:n.n.n.n] are now always recognized.
4081 PH/14 When a uid/gid is specified for the queryprogram router, it cannot be
4082 used if the router is not running as root, for example, when verifying at
4083 ACL time, or when using -bh. The debugging output from this situation was
4084 non-existent - all you got was a failure to exec. I have made two
4087 (a) Failures to set uid/gid, the current directory, or a process leader
4088 in a subprocess such as that created by queryprogram now generate
4089 suitable debugging output when -d is set.
4091 (b) The queryprogram router detects when it is not running as root,
4092 outputs suitable debugging information if -d is set, and then runs
4093 the subprocess without attempting to change uid/gid.
4095 PH/15 Minor change to Makefile for building test_host (undocumented testing
4098 PH/16 As discussed on the list in Nov/Dec: Exim no longer looks at the
4099 additional section of a DNS packet that returns MX or SRV records.
4100 Instead, it always explicitly searches for A/AAAA records. This avoids
4101 major problems that occur when a DNS server includes only records of one
4102 type (A or AAAA) in an MX/SRV packet. A byproduct of this change has
4103 fixed another bug: if SRV records were looked up and the corresponding
4104 address records were *not* found in the additional section, the port
4105 values from the SRV records were lost.
4107 PH/17 If a delivery to a pipe, file, or autoreply was deferred, Exim was not
4108 using the correct key (the original address) when searching the retry
4109 rules in order to find which one to use for generating the retry hint.
4111 PH/18 If quota_warn_message contains a From: header, Exim now refrains from
4112 adding the default one. Similarly, if it contains a Reply-To: header, the
4113 errors_reply_to option, if set, is not used.
4115 PH/19 When calculating a retry time, Exim used to measure the "time since
4116 failure" by looking at the "first failed" field in the retry record. Now
4117 it does not use this if it is later than than the arrival time of the
4118 message. Instead it uses the arrival time. This makes for better
4119 behaviour in cases where some deliveries succeed, thus re-setting the
4120 "first failed" field. An example is a quota failure for a huge message
4121 when small messages continue to be delivered. Without this change, the
4122 "time since failure" will always be short, possible causing more frequent
4123 delivery attempts for the huge message than are intended.
4124 [Note: This change was subsequently modified - see PH/04 for 4.62.]
4126 PH/20 Added $auth1, $auth2, $auth3 to contain authentication data (as well as
4127 $1, $2, $3) because the numerical variables can be reset during some
4128 expansion items (e.g. "match"), thereby losing the authentication data.
4130 PH/21 Make -bV show the size of off_t variables so that the test suite can
4131 decide whether to run tests for quotas > 2G.
4133 PH/22 Test the values given for quota, quota_filecount, quota_warn_threshold,
4134 mailbox_size, and mailbox_filecount in the appendfile transport. If a
4135 filecount value is greater than 2G or if a quota value is greater than 2G
4136 on a system where the size of off_t is not greater than 4, a panic error
4139 PH/23 When a malformed item such as 1.2.3/24 appears in a host list, it can
4140 never match. The debug and -bh output now contains an explicit error
4141 message indicating a malformed IPv4 address or mask.
4143 PH/24 An host item such as 1.2.3.4/abc was being treated as the IP address
4144 1.2.3.4 without a mask. Now it is not recognized as an IP address, and
4145 PH/23 above applies.
4147 PH/25 Do not write to syslog when running in the test harness. The only
4148 occasion when this arises is a failure to open the main or panic logs
4149 (for which there is an explicit test).
4151 PH/26 Added the /no_tell option to "control=freeze".
4153 PH/27 If a host name lookup failed very early in a connection, for example, if
4154 the IP address matched host_lookup and the reverse lookup yielded a name
4155 that did not have a forward lookup, an error message of the form "no IP
4156 address found for host xxx.xxx.xxx (during SMTP connection from NULL)"
4157 could be logged. Now it outputs the IP address instead of "NULL".
4159 PH/28 An enabling patch from MH: add new function child_open_exim2() which
4160 allows the sender and the authenticated sender to be set when
4161 submitting a message from within Exim. Since child_open_exim() is
4162 documented for local_scan(), the new function should be too.
4164 PH/29 In GnuTLS, a forced expansion failure for tls_privatekey was not being
4165 ignored. In both GnuTLS and OpenSSL, an expansion of tls_privatekey that
4166 results in an empty string is now treated as unset.
4168 PH/30 Fix eximon buffer overflow bug (Bugzilla #73).
4170 PH/31 Added sender_verify_fail logging option.
4172 PH/32 In November 2003, the code in Exim that added an empty Bcc: header when
4173 needed by RFC 822 but not by RFC 2822 was commented out. I have now
4174 tidied the source and removed it altogether.
4176 PH/33 When a queue run was abandoned because the load average was too high, a
4177 log line was always written; now it is written only if the queue_run log
4178 selector is set. In addition, the log line for abandonment now contains
4179 information about the queue run such as the pid. This is always present
4180 in "start" and "stop" lines but was omitted from the "abandon" line.
4182 PH/34 Omit spaces between a header name and the colon in the error message that
4183 is given when verify = headers_syntax fails (if there are lots of them,
4184 the message gets confusing).
4186 PH/35 Change the default for dns_check_names_pattern to allow slashes within
4187 names, as there are now some PTR records that contain slashes. This check
4188 is only to protect against broken name servers that fall over on strange
4189 characters, so the fact that it applies to all lookups doesn't matter.
4191 PH/36 Now that the new test suite is complete, we can remove some of the
4192 special code in Exim that was needed for the old test suite. For example,
4193 sorting DNS records because real resolvers return them in an arbitrary
4194 order. The new test suite's fake resolver always returns records in the
4197 PH/37 When running in the test harness, use -odi for submitted messages (e.g.
4198 bounces) except when queue_only is set, to avoid logging races between
4199 the different processes.
4201 PH/38 Panic-die if .include specifies a non-absolute path.
4203 PH/39 A tweak to the "H" retry rule from its user.
4205 JJ/03 exipick: Removed parentheses from 'next' and 'last' calls that specified
4206 a label. They prevented compilation on older perls.
4208 JJ/04 exipick: Refactored code to prevent implicit split to @_ which caused
4209 a warning to be raised on newish perls.
4211 JJ/05 exipick: Fixed bug where -bpc always showed a count of all messages
4212 on queue. Changes to match documented behaviour of showing count of
4213 messages matching specified criteria.
4215 PH/40 Changed the default ident timeout from 30s to 5s.
4217 PH/41 Added support for the use of login_cap features, on those BSD systems
4218 that have them, for controlling the resources used by pipe deliveries.
4220 PH/42 The content-scanning code uses fopen() to create files in which to put
4221 message data. Previously it was not paying any attention to the mode of
4222 the files. Exim runs with umask(0) because the rest of the code creates
4223 files with open(), and sets the required mode explicitly. Thus, these
4224 files were ending up world-writeable. This was not a big issue, because,
4225 being within the spool directory, they were not world-accessible. I have
4226 created a function called modefopen, which takes an additional mode
4227 argument. It sets umask(777), creates the file, chmods it to the required
4228 mode, then resets the umask. All the relevant calls to fopen() in the
4229 content scanning code have been changed to use this function.
4231 PH/43 If retry_interval_max is set greater than 24 hours, it is quietly reset
4232 to 24 hours. This avoids potential overflow problems when processing G
4233 and H retry rules. I suspect nobody ever tinkers with this value.
4235 PH/44 Added STRIP_COMMAND=/usr/bin/strip to the FreeBSD Makefile.
4237 PH/45 When the plaintext authenticator is running as a client, the server's
4238 challenges are checked to ensure they are valid base64 strings. By
4239 default, the authentication attempt is cancelled if an invalid string is
4240 received. Setting client_ignore_invalid_base64 true ignores these errors.
4241 The decoded challenge strings are now placed in $auth1, $auth2, etc. as
4242 they are received. Thus, the responses can be made to depend on the
4243 challenges. If an invalid string is ignored, an empty string is placed in
4246 PH/46 Messages that are created by the autoreply transport now contains a
4247 References: header, in accordance with RFCs 2822 and 3834.
4249 PH/47 Added authenticated_sender_force to the smtp transport.
4251 PH/48 The ${prvs expansion was broken on systems where time_t was long long.
4253 PH/49 Installed latest patch from the Sieve maintainer.
4255 PH/50 When an Exim quota was set without a file count quota, and mailbox_size
4256 was also set, the appendfile transport was unnecessarily scanning a
4257 directory of message files (e.g. for maildir delivery) to find the count
4258 of files (along with the size), even though it did not need this
4259 information. It now does the scan only if it needs to find either the
4260 size of the count of files.
4262 PH/51 Added ${time_eval: to convert Exim time strings into seconds.
4264 PH/52 Two bugs concerned with error handling when the smtp transport is
4267 (i) Exim was not creating retry information for temporary errors given
4268 for individual recipients after the DATA command when the smtp transport
4269 was used in LMTP mode. This meant that they could be retried too
4270 frequently, and not timed out correctly.
4272 (ii) Exim was setting the flag that allows error details to be returned
4273 for LMTP errors on RCPT commands, but not for LMTP errors for individual
4274 recipients that were returned after the DATA command.
4276 PH/53 This is related to PH/52, but is more general: for any failing address,
4277 when detailed error information was permitted to be returned to the
4278 sender, but the error was temporary, then after the final timeout, only
4279 "retry timeout exceeded" was returned. Now it returns the full error as
4280 well as "retry timeout exceeded".
4282 PH/54 Added control=allow_auth_unadvertised, as it seems there are clients that
4283 do this, and (what is worse) MTAs that accept it.
4285 PH/55 Added the add_header modified to ACLs. The use of "message" with "warn"
4286 will now be deprecated.
4288 PH/56 New os.c-cygwin from the Cygwin maintainer.
4290 JJ/06 exipick: added --unsorted option to allow unsorted output in all output
4291 formats (previously only available in exim formats via -bpr, -bpru,
4292 and -bpra. Now also available in native and exiqgrep formats)
4294 JJ/07 exipick: added --freeze and --thaw options to allow faster interaction
4295 with very large, slow to parse queues
4297 JJ/08 exipick: added ! as generic prefix to negate any criteria format
4299 JJ/09 exipick: miscellaneous performance enhancements (~24% improvements)
4301 PH/57 Tidies in SMTP dialogue display in debug output: (i) It was not showing
4302 responses to authentication challenges, though it was showing the
4303 challenges; (ii) I've removed the CR characters from the debug output for
4306 PH/58 Allow for the insertion of a newline as well as a space when a string
4307 is turned into more than one encoded-word during RFC 2047 encoding. The
4308 Sieve code now uses this.
4310 PH/59 Added the following errors that can be detected in retry rules: mail_4xx,
4311 data_4xx, lost_connection, tls_required.
4313 PH/60 When a VRFY deferred or FAILED, the log message rather than the user
4314 message was being sent as an SMTP response.
4316 PH/61 Add -l and -k options to exicyclog.
4318 PH/62 When verifying, if an address was redirected to one new address, so that
4319 verification continued, and the new address failed or deferred after
4320 having set something in $address_data, the value of $address_data was not
4321 passed back to the ACL. This was different to the case when no
4322 redirection occurred. The value is now passed back in both cases.
4324 PH/63 Changed the macro HAVE_LOGIN_CAP (see PH/41 for this release above) to
4325 HAVE_SETCLASSRESOURCES because there are different APIs in use that all
4326 use login_cap.h, so on its own it isn't the distinguishing feature. The
4327 new name refers directly to the setclassresources() function.
4329 PH/65 Added configuration files for NetBSD3.
4331 PH/66 Updated OS/Makefile-HP-UX for gcc 4.1.0 with HP-UX 11.
4333 PH/67 Fixed minor infelicity in the sorting of addresses to ensure that IPv6
4334 is preferred over IPv4.
4336 PH/68 The bounce_return_message and bounce_return_body options were not being
4337 honoured for bounces generated during the reception of non-SMTP messages.
4338 In particular, this applied to messages rejected by the ACL. This bug has
4339 been fixed. However, if bounce_return_message is true and bounce_return_
4340 body is false, the headers that are returned for a non-SMTP message
4341 include only those that have been read before the error was detected.
4342 (In the case of an ACL rejection, they have all been read.)
4344 PH/69 The HTML version of the specification is now built in a directory called
4345 spec_html instead of spec.html, because the latter looks like a path with
4346 a MIME-type, and this confuses some software.
4348 PH/70 Catch two compiler warnings in sieve.c.
4350 PH/71 Fixed an obscure and subtle bug (thanks Alexander & Matthias). The
4351 function verify_get_ident() calls ip_connect() to connect a socket, but
4352 if the "connect()" function timed out, ip_connect() used to close the
4353 socket. However, verify_get_ident() also closes the socket later, and in
4354 between Exim writes to the log, which may get opened at this point. When
4355 the socket was closed in ip_connect(), the log could get the same file
4356 descriptor number as the socket. This naturally causes chaos. The fix is
4357 not to close the socket in ip_connect(); the socket should be closed by
4358 the function that creates it. There was only one place in the code where
4359 this was missing, in the iplookup router, which I don't think anybody now
4360 uses, but I've fixed it anyway.
4362 PH/72 Make dns_again_means_nonexist apply to lookups using gethostbyname() as
4363 well as to direct DNS lookups. Otherwise the handling of names in host
4364 lists is inconsistent and therefore confusing.
4370 PH/01 Two changes to the default runtime configuration:
4372 (1) Move the checks for relay_from_hosts and authenticated clients from
4373 after to before the (commented out) DNS black list checks.
4375 (2) Add control=submission to the relay_from_hosts and authenticated
4376 clients checks, on the grounds that messages accepted by these
4377 statements are most likely to be submissions.
4379 PH/02 Several tidies to the handling of ${prvs and ${prvscheck:
4381 (1) Generate an error if the third argument for the ${prvs expansion is
4384 (2) Treat a missing third argument of ${prvscheck as if it were an empty
4387 (3) Reset the variables that are obtained from the first argument of
4388 ${prvscheck and used in the second argument before leaving the code,
4389 because their memory is reclaimed, so using them afterwards may do
4392 (4) Tidy up the code for expanding the arguments of ${prvscheck one by
4393 one (it's much easier than Tom thought :-).
4395 (5) Because of (4), we can now allow for the use of $prvscheck_result
4396 inside the third argument.
4398 PH/03 For some reason, the default setting of PATH when running a command from
4399 a pipe transport was just "/usr/bin". I have changed it to
4402 PH/04 SUPPORT_TRANSLATE_IP_ADDRESS and MOVE_FROZEN_MESSAGES did not cause
4403 anything to be listed in the output from -bV.
4405 PH/05 When a filter generated an autoreply, the entire To: header line was
4406 quoted in the delivery log line, like this:
4408 => >A.N.Other <ano@some.domain> <original@ddress> ...
4410 This has been changed so that it extracts the operative address. There
4411 may be more than one such address. If so, they are comma-separated, like
4414 => >ano@some.domain,ona@other.domain <original@ddress> ...
4416 PH/06 When a client host used a correct literal IP address in a HELO or EHLO
4417 command, (for example, EHLO [1.2.3.4]) and the client's IP address was
4418 not being looked up in the rDNS to get a host name, Exim was showing the
4419 IP address twice in Received: lines, even though the IP addresses were
4420 identical. For example:
4422 Received: from [1.2.3.4] (helo=[1.2.3.4])
4424 However, if the real host name was known, it was omitting the HELO data
4425 if it matched the actual IP address. This has been tidied up so that it
4426 doesn't show the same IP address twice.
4428 PH/07 When both +timestamp and +memory debugging was on, the value given by
4429 $tod_xxx expansions could be wrong, because the tod_stamp() function was
4430 called by the debug printing, thereby overwriting the timestamp buffer.
4431 Debugging no longer uses the tod_stamp() function when +timestamp is set.
4433 PH/08 When the original message was included in an autoreply transport, it
4434 always said "this is a copy of the message, including all the headers",
4435 even if body_only or headers_only was set. It now gives an appropriate
4438 PH/09 Applied a patch from the Sieve maintainer which:
4440 o fixes some comments
4441 o adds the (disabled) notify extension core
4442 o adds some debug output for the result of if/elsif tests
4443 o points to the current vacation draft in the documentation
4444 and documents the missing references header update
4448 o fixes a bug in processing the envelope test (when testing
4449 multiple envelope elements, the last element determined the
4452 PH/10 Exim was violating RFC 3834 ("Recommendations for Automatic Responses to
4453 Electronic Mail") by including:
4455 Auto-submitted: auto-generated
4457 in the messages that it generates (bounce messages and others, such as
4458 warnings). In the case of bounce messages for non-SMTP messages, there was
4459 also a typo: it was using "Auto_submitted" (underscore instead of
4460 hyphen). Since every message generated by Exim is necessarily in response
4461 to another message, thes have all been changed to:
4463 Auto-Submitted: auto-replied
4465 in accordance with these statements in the RFC:
4467 The auto-replied keyword:
4469 - SHOULD be used on messages sent in direct response to another
4470 message by an automatic process,
4472 - MUST NOT be used on manually-generated messages,
4474 - MAY be used on Delivery Status Notifications (DSNs) and Message
4475 Disposition Notifications (MDNs),
4477 - MUST NOT be used on messages generated by automatic or periodic
4478 processes, except for messages which are automatic responses to
4481 PH/11 Added "${if def:sender_address {(envelope-from <$sender_address>)\n\t}}"
4482 to the default Received: header definition.
4484 PH/12 Added log selector acl_warn_skipped (default on).
4486 PH/13 After a successful wildlsearch lookup, discard the values of numeric
4487 variables because (a) they are in the wrong storage pool and (b) even if
4488 they were copied, it wouldn't work properly because of the caching.
4490 PH/14 Add check_rfc2047_length to disable enforcement of RFC 2047 length
4491 checking when decoding. Apparently there are clients that generate
4492 overlong encoded strings. Why am I not surprised?
4494 PH/15 If the first argument of "${if match_address" was not empty, but did not
4495 contain an "@" character, Exim crashed. Now it writes a panic log message
4496 and treats the condition as false.
4498 PH/16 In autoreply, treat an empty string for "once" the same as unset.
4500 PH/17 A further patch from the Sieve maintainer: "Introduce the new Sieve
4501 extension "envelope-auth". The code is finished and in agreement with
4502 other implementations, but there is no documentation so far and in fact,
4503 nobody wrote the draft yet. This extension is currently #undef'ed, thus
4504 not changing the active code.
4506 Print executed "if" and "elsif" statements when debugging is used. This
4507 helps a great deal to understand what a filter does.
4509 Document more things not specified clearly in RFC3028. I had all this
4510 sorted out, when out of a sudden new issues came to my mind. Oops."
4512 PH/18 Exim was not recognizing the "net-" search type prefix in match_ip lists
4515 PH/19 Exim expands the IPv6 address given to -bh to its full non-abbreviated
4516 canonical form (as documented). However, after a host name lookup from
4517 the IP address, check_host() was doing a simple string comparison with
4518 addresses acquired from the DNS when checking that the found name did
4519 have the original IP as one of its addresses. Since any found IPv6
4520 addresses are likely to be in abbreviated form, the comparison could
4521 fail. Luckily, there already exists a function for doing the comparison
4522 by converting both addresses to binary, so now that is used instead of
4523 the text comparison.
4525 PH/20 There was another similar case to PH/19, when a complete host name was
4526 given in a host list; looking up its IP address could give an abbreviated
4527 form, whereas the current host's name might or might not be abbreviated.
4528 The same fix has been applied.
4534 PH/01 The ${base62: operator adjusted itself to base 36 when BASE_62 was
4535 set to 36 (for Darwin and Cygwin), but the ${base62d: operator did not.
4538 PH/02 Two minor problems detected in Cygwin: the os.{c,h} files had lost */ on
4539 the CVS lines, and there was a missing #if HAVE_IPV6 in host.c.
4541 PH/03 Typo: missing ".o" in src/pcre/Makefile.
4543 PH/04 Tighten up "personal" tests: Instead of testing for any "List-"
4544 header line, restrict the check to what is listed in RFCs 2369 and 2929.
4545 Also, for "Auto-Submitted", treat anything other than "no" as
4546 non-personal, in accordance with RFC 3834. (Previously it treated
4547 anything starting "auto-" as non-personal.)
4549 TF/01 The control=submission/name=... option had a problem with syntax
4550 errors if the name included a slash character. The /name= option
4551 now slurps the rest of the string, so it can include any characters
4552 but it must come last in the list of options (after /sender_retain
4555 PH/05 Some modifications to the interface to the fake nameserver for the new
4563 TK/01 Added the "success_on_redirect" address verification option. See
4564 NewStuff for rationale and an example.
4566 PH/01 Added support for SQLite, basic code supplied by David Woodhouse.
4568 PH/02 Patch to exigrep to allow it to work on syslog lines.
4570 PH/03 When creating an mbox file for a virus/spam scan, use fseek() instead of
4571 fread() to skip over the body file's header line, because in Cygwin the
4572 header line is locked and is inaccessible.
4574 PH/04 Added $message_exim_id, ultimately to replace $message_id (they will both
4575 co-exist for some time) to make it clear that it is the Exim ID that is
4576 referenced, not the Message-ID: header line.
4578 PH/05 Replaced all Tom's calls to snprintf() with calls to the internal
4579 string_format() function, because snprintf() does not exist on all
4582 PH/06 The use of forbid_filter_existstest now also locks out the use of the
4583 ${stat: expansion item.
4585 PH/07 Changed "SMTP protocol violation: synchronization error" into "SMTP
4586 protocol synchronization error", to keep the pedants happy.
4588 PH/08 Arrange for USE_INET_NTOA_FIX to be set in config.h for AIX systems as
4589 well as for IRIX systems, when gcc is being used. See the host.c source
4592 PH/09 Installed latest Cygwin configuration files from the Cygwin maintainer.
4594 PH/10 Named domain lists were not working if used in a queue_smtp_domains
4597 PH/11 Added support for the IGNOREQUOTA extension to LMTP, both to the lmtp
4598 transport and to the smtp transport in LMTP mode.
4600 TK/02 Remove one case of BASE64 error detection FTTB (undocumented anyway).
4602 PH/12 There was a missing call to search_tidyup() before the fork() in rda.c to
4603 run a filter in a subprocess. This could lead to confusion in subsequent
4604 lookups in the parent process. There should also be a search_tidyup() at
4605 the end of the subprocess.
4607 PH/13 Previously, if "verify = helo" was set in an ACL, the condition was true
4608 only if the host matched helo_try_verify_hosts, which caused the
4609 verification to occur when the EHLO/HELO command was issued. The ACL just
4610 tested the remembered result. Now, if a previous verification attempt has
4611 not happened, "verify = helo" does it there and then.
4613 JJ/01 exipick: added $message_exim_id variable (see 4.53-PH/04)
4615 TK/03 Fix log output including CR from clamd.
4617 PH/14 A reference to $reply_address when Reply-to: was empty and From: did not
4618 exist provoked a memory error which could cause a segfault.
4620 PH/15 Installed PCRE 6.2
4622 PH/17 Defined BIND_8_COMPAT in the Darwin os.h file.
4624 PH/18 Reversed 4.52/PH/17 because the HP-UX user found it wasn't the cause
4625 of the problem. Specifically, suggested +O2 rather than +O1 for the
4628 PH/19 Added sqlite_lock_timeout option (David Woodhouse's patch).
4630 PH/20 If a delivery was routed to a non-standard port by means of an SRV
4631 record, the port was not correctly logged when the outgoing_port log
4632 selector was set (it logged the transort's default port).
4634 PH/21 Added support for host-specific ports to manualroute, queryprogram,
4635 fallback_hosts, and "hosts" in the smtp transport.
4637 PH/22 If the log selector "outgoing_port" is set, the port is now also given on
4638 host errors such as "Connection refused".
4640 PH/23 Applied a patch to fix problems with exim-4.52 while doing radius
4641 authentication with radiusclient 0.4.9:
4643 - Error returned from rc_read_config was caught wrongly
4644 - Username/password not passed on to radius server due to wrong length.
4646 The presumption is that some radiusclient API changes for 4.51/PH/17
4647 were not taken care of correctly. The code is still untested by me (my
4648 Linux distribution still has 0.3.2 of radiusclient), but it was
4649 contributed by a Radius user.
4651 PH/24 When doing a callout, the value of $domain wasn't set correctly when
4652 expanding the "port" option of the smtp transport.
4654 TK/04 MIME ACL: Fix buffer underrun that occurs when EOF condition is met
4655 while reading a MIME header. Thanks to Tom Hughes for a patch.
4657 PH/24 Include config.h inside local_scan.h so that configuration settings are
4660 PH/25 Make $smtp_command_argument available after all SMTP commands. This means
4661 that in an ACL for RCPT (for example), you can examine exactly what was
4664 PH/26 Exim was recognizing IPv6 addresses of the form [IPv6:....] in EHLO
4665 commands, but it was not correctly comparing the address with the actual
4666 client host address. Thus, it would show the EHLO address in Received:
4667 header lines when this was not necessary.
4669 PH/27 Added the % operator to ${eval:}.
4671 PH/28 Exim tries to create and chdir to its spool directory when it starts;
4672 it should be ignoring failures (because with -C, for example, it has lost
4673 privilege). It wasn't ignoring creation failures other than "already
4676 PH/29 Added "crypteq" to the list of supported features that Exim outputs when
4679 PH/30 Fixed (presumably very longstanding) bug in exim_dbmbuild: if it failed
4680 because an input line was too long, either on its own, or by virtue of
4681 too many continuations, the temporary file was not being removed, and the
4682 return code was incorrect.
4684 PH/31 Missing "BOOL" in function definition in filtertest.c.
4686 PH/32 Applied Sieve patches from the maintainer.
4688 TK/05 Domainkeys: Accomodate for a minor API change in libdomainkeys 0.67.
4690 PH/33 Added "verify = not_blind".
4692 PH/34 There are settings for CHOWN_COMMAND and MV_COMMAND that can be used in
4693 Local/Makefile (with some defaults set). These are used in built scripts
4694 such as exicyclog, but they have never been used in the exim_install
4695 script (though there are many overriding facilities there). I have
4696 arranged that the exim_install script now takes note of these two
4699 PH/35 Installed configuration files for Dragonfly.
4701 PH/36 When a locally submitted message by a trusted user did not contain a
4702 From: header, and the sender address was obtained from -f or from an SMTP
4703 MAIL command, and the trusted user did not use -F to supply a sender
4704 name, $originator_name was incorrectly used when constructing a From:
4705 header. Furthermore, $originator_name was used for submission mode
4706 messages from external hosts without From: headers in a similar way,
4707 which is clearly wrong.
4709 PH/37 Added control=suppress_local_fixups.
4711 PH/38 When log_selector = +received_sender was set, and the addition of the
4712 sender made the log line's construction buffer exactly full, or one byte
4713 less than full, an overflow happened when the terminating "\n" was
4716 PH/39 Added a new log selector, "unknown_in_list", which provokes a log entry
4717 when the result of a list match is failure because a DNS lookup failed.
4719 PH/40 RM_COMMAND is now used in the building process.
4721 PH/41 Added a "distclean" target to the top-level Makefile; it deletes all
4722 the "build-* directories that it finds.
4724 PH/42 (But a TF fix): In a domain list, Exim incorrectly matched @[] if the IP
4725 address in a domain literal was a prefix of an interface address.
4727 PH/43 (Again a TF fix): In the dnslookup router, do not apply widen_domains
4728 when verifying a sender address, unless rewrite_headers is false.
4730 PH/44 Wrote a long comment about why errors_to addresses are verified as
4731 recipients, not senders.
4733 TF/01 Add missing LIBS=-lm to OS/Makefile-OpenBSD which was overlooked when
4734 the ratelimit ACL was added.
4736 PH/45 Added $smtp_command for the full command (cf $smtp_command_argument).
4738 PH/46 Added extra information about PostgreSQL errors to the error string.
4740 PH/47 Added an interface to a fake DNS resolver for use by the new test suite,
4741 avoiding the need to install special zones in a real server. This is
4742 backwards compatible; if it can't find the fake resolver, it drops back.
4743 Thus, both old and new test suites can be run.
4745 TF/02 Added util/ratelimit.pl
4747 TF/03 Minor fix to the ratelimit code to improve its behaviour in case the
4748 clock is set back in time.
4750 TF/04 Fix the ratelimit support in exim_fixdb. Patch provided by Brian
4751 Candler <B.Candler@pobox.com>.
4753 TF/05 The fix for PH/43 was not completely correct; widen_domains is always
4754 OK for addresses that are the result of redirections.
4756 PH/48 A number of further additions for the benefit of the new test suite,
4757 including a fake gethostbyname() that interfaces to the fake DNS resolver
4760 TF/06 The fix for widen_domains has also been applied to qualify_single and
4761 search_parents which are the other dnslookup options that can cause
4764 PH/49 Michael Haardt's randomized retrying, but as a separate retry parameter
4767 PH/50 Make never_users, trusted_users, admin_groups, trusted_groups expandable.
4769 TF/07 Exim produced the error message "an SRV record indicated no SMTP
4770 service" if it encountered an MX record with an empty target hostname.
4771 The message is now "an MX or SRV record indicated no SMTP service".
4773 TF/08 Change PH/13 introduced the possibility that verify=helo may defer,
4774 if the DNS of the sending site is misconfigured. This is quite a
4775 common situation. This change restores the behaviour of treating a
4776 helo verification defer as a failure.
4778 PH/51 If self=fail was set on a router, the bounce message did not include the
4779 actual error message.
4785 TF/01 Added support for Client SMTP Authorization. See NewStuff for details.
4787 PH/01 When a transport filter timed out in a pipe delivery, and the pipe
4788 command itself ended in error, the underlying message about the transport
4789 filter timeout was being overwritten with the pipe command error. Now the
4790 underlying error message should be appended to the second error message.
4792 TK/01 Fix poll() being unavailable on Mac OSX 10.2.
4794 PH/02 Reduce the amount of output that "make" produces by default. Full output
4795 can still be requested.
4797 PH/03 The warning log line about a condition test deferring for a "warn" verb
4798 was being output only once per connection, rather than after each
4799 occurrence (because it was using the same function as for successful
4800 "warn" verbs). This seems wrong, so I have changed it.
4802 TF/02 Two buglets in acl.c which caused Exim to read a few bytes of memory that
4803 it should not have, which might have caused a crash in the right
4804 circumstances, but probably never did.
4806 PH/04 Installed a modified version of Tony Finch's patch to make submission
4807 mode fix the return path as well as the Sender: header line, and to
4808 add a /name= option so that you can make the user's friendly name appear
4811 TF/03 Added the control = fakedefer ACL modifier.
4813 TF/04 Added the ratelimit ACL condition. See NewStuff for details. Thanks to
4814 Mark Lowes for thorough testing.
4816 TK/02 Rewrote SPF support to work with libspf2 versions >1.2.0.
4818 TK/03 Merged latest SRS patch from Miles Wilton.
4820 PH/05 There's a shambles in IRIX6 - it defines EX_OK in unistd.h which conflicts
4821 with the definition in sysexits.h (which is #included earlier).
4822 Fortunately, Exim does not actually use EX_OK. The code used to try to
4823 preserve the sysexits.h value, by assuming that macro definitions were
4824 scanned for macro replacements. I have been disabused of this notion,
4825 so now the code just undefines EX_OK before #including unistd.h.
4827 PH/06 There is a timeout for writing blocks of data, set by, e.g. data_timeout
4828 in the smtp transport. When a block could not be written in a single
4829 write() function, the timeout was being re-applied to each part-write.
4830 This seems wrong - if the receiver was accepting one byte at a time it
4831 would take for ever. The timeout is now adjusted when this happens. It
4832 doesn't have to be particularly precise.
4834 TK/04 Added simple SPF lookup method in EXPERIMENTAL_SPF. See NewStuff for
4835 details. Thanks to Chris Webb <chris@arachsys.com> for the patch!
4837 PH/07 Added "fullpostmaster" verify option, which does a check to <postmaster>
4838 without a domain if the check to <postmaster@domain> fails.
4840 SC/01 Eximstats: added -xls and the ability to specify output files
4841 (patch written by Frank Heydlauf).
4843 SC/02 Eximstats: use FileHandles for outputting results.
4845 SC/03 Eximstats: allow any combination of xls, txt, and html output.
4847 SC/04 Eximstats: fixed display of large numbers with -nvr option
4849 SC/05 Eximstats: fixed merging of reports with empty tables.
4851 SC/06 Eximstats: added the -include_original_destination flag
4853 SC/07 Eximstats: removed tabs and trailing whitespace.
4855 TK/05 Malware: Improve on aveserver error handling. Patch from Alex Miller.
4857 TK/06 MBOX spool code: Add real "From " MBOX separator line
4858 so the .eml file is really in mbox format (even though
4859 most programs do not really care). Patch from Alex Miller.
4861 TK/07 MBOX spool code: Add X-Envelope-From: and X-Envelope-To: headers.
4862 The latter is generated from $received_to and is only set if the
4863 message has one envelope recipient. SA can use these headers,
4864 obviously out-of-the-box. Patch from Alex Miller.
4866 PH/08 The ${def test on a variable was returning false if the variable's
4867 value was "0", contrary to what the specification has always said!
4868 The result should be true unless the variable is empty.
4870 PH/09 The syntax error of a character other than { following "${if
4871 def:variable_name" (after optional whitespace) was not being diagnosed.
4872 An expansion such as ${if def:sender_ident:{xxx}{yyy}} in which an
4873 accidental colon was present, for example, could give incorrect results.
4875 PH/10 Tidied the code in a number of places where the st_size field of a stat()
4876 result is used (not including appendfile, where other changes are about
4879 PH/11 Upgraded appendfile so that quotas larger than 2G are now supported.
4880 This involved changing a lot of size variables from int to off_t. It
4881 should work with maildirs and everything.
4883 TK/08 Apply fix provided by Michael Haardt to prevent deadlock in case of
4884 spamd dying while we are connected to it.
4886 TF/05 Fixed a ${extract error message typo reported by Jeremy Harris
4889 PH/12 Applied Alex Kiernan's patch for the API change for the error callback
4890 function for BDB 4.3.
4892 PH/13 Changed auto_thaw such that it does not apply to bounce messages.
4894 PH/14 Imported PCRE 6.0; this was more than just a trivial operation because
4895 the sources for PCRE have been re-arranged and more files are now
4898 PH/15 The code I had for printing potentially long long variables in PH/11
4899 above was not the best (it lost precision). The length of off_t variables
4900 is now inspected at build time, and an appropriate printing format (%ld
4901 or %lld) is chosen and #defined by OFF_T_FMT. We also define LONGLONG_T
4902 to be "long long int" or "long int". This is needed for the internal
4903 formatting function string_vformat().
4905 PH/16 Applied Matthew Newton's patch to exicyclog: "If log_file_path is set in
4906 the configuration file to be ":syslog", then the script "guesses" where
4907 the logs files are, rather than using the compiled in default. In our
4908 case the guess is not the same as the compiled default, so the script
4909 suddenly stopped working when I started to use syslog. The patch checks
4910 to see if log_file_path is "". If so, it attempts to read it from exim
4911 with no configuration file to get the compiled in version, before it
4912 falls back to the previous guessing code."
4914 TK/09 Added "prvs" and "prvscheck" expansion items. These help a lot with
4915 implementing BATV in an Exim configuration. See NewStuff for the gory
4918 PH/17 Applied Michael Haardt's patch for HP-UX, affecting only the os.h and
4919 Makefile that are specific to HP-UX.
4921 PH/18 If the "use_postmaster" option was set for a recipient callout together
4922 with the "random" option, the postmaster address was used as the MAIL
4923 FROM address for the random test, but not for the subsequent recipient
4924 test. It is now used for both.
4926 PH/19 Applied Michael Haardt's patch to update Sieve to RFC3028bis. "The
4927 patch removes a few documentation additions to RFC 3028, because the
4928 latest draft now contains them. It adds the new en;ascii-case comparator
4929 and a new error check for 8bit text in MIME parts. Comparator and
4930 require names are now matched exactly. I enabled the subaddress
4931 extension, but it is not well tested yet (read: it works for me)."
4933 PH/20 Added macros for time_t as for off_t (see PH/15 above) and used them to
4934 rework some of the code of TK/09 above to avoid the hardwired use of
4935 "%lld" and "long long". Replaced the call to snprintf() with a call to
4938 PH/21 Added some other messages to those in 4.51/PH/42, namely "All relevant MX
4939 records point to non-existent hosts", "retry timeout exceeded", and
4940 "retry time not reached for any host after a long failure period".
4942 PH/22 Fixed some oversights/typos causing bugs when Exim is compiled with
4943 experimental DomainKeys support:
4945 (1) The filter variables $n0-$n9 and $sn0-$sn9 were broken.
4946 (2) On an error such as an illegally used "control", the wrong name for
4947 the control was given.
4949 These problems did NOT occur unless DomainKeys support was compiled.
4951 PH/23 Added daemon_startup_retries and daemon_startup_sleep.
4953 PH/24 Added ${if match_ip condition.
4955 PH/25 Put debug statements on either side of calls to EXIM_DBOPEN() for hints
4956 databases so that it will be absolutely obvious if a crash occurs in the
4957 DB library. This is a regular occurrence (often caused by mis-matched
4960 PH/26 Insert a lot of missing (void) casts for functions such as chown(),
4961 chmod(), fcntl(), sscanf(), and other functions from stdio.h. These were
4962 picked up on a user's system that detects such things. There doesn't seem
4963 to be a gcc warning option for this - only an attribute that has to be
4964 put on the function's prototype. It seems that in Fedora Core 4 they have
4965 set this on a number of new functions. No doubt there will be more in due
4968 PH/27 If a dnslookup or manualroute router is set with verify=only, it need not
4969 specify a transport. However, if an address that was verified by such a
4970 router was the subject of a callout, Exim crashed because it tried to
4971 read the rcpt_include_affixes from the non-existent transport. Now it
4972 just assumes that the setting of that option is false. This bug was
4973 introduced by 4.51/PH/31.
4975 PH/28 Changed -d+all to exclude +memory, because that information is very
4976 rarely of interest, but it makes the output a lot bigger. People tend to
4977 do -d+all out of habit.
4979 PH/29 Removed support for the Linux-libc5 build, as it is obsolete and the
4980 code in os-type was giving problems when libc.so lives in lib64, like on
4983 PH/30 Exim's DNS code uses the original T_xxx names for DNS record times. These
4984 aren't the modern standard, and it seems that some systems' include files
4985 don't always have them. Exim was already checking for some of the newer
4986 ones like T_AAAA, and defining it itself. I've added checks for all the
4987 record types that Exim uses.
4989 PH/31 When using GnuTLS, if the parameters cache file did not exist, Exim was
4990 not automatically generating a new one, as it is supposed to. This
4991 prevented TLS from working. If the file did exist, but contained invalid
4992 data, a new version was generated, as expected. It was only the case of a
4993 non-existent file that was broken.
4995 TK/10 Domainkeys: Fix a bug in verification that caused a crash in conjunction
4996 with a change in libdomainkeys > 0.64.
4998 TK/11 Domainkeys: Change the logic how the "testing" policy flag is retrieved
4999 from DNS. If the selector record carries the flag, it now has
5000 precedence over the domain-wide flag.
5002 TK/12 Cleared some compiler warnings related to SPF, SRS and DK code.
5004 PH/32 In mua_wrapper mode, if an smtp transport configuration error (such as
5005 the use of a port name that isn't defined in /etc/services) occurred, the
5006 message was deferred as in a normal delivery, and thus remained on the
5007 spool, instead of being failed because of the mua_wrapper setting. This
5008 is now fixed, and I tidied up some of the mua_wrapper messages at the
5011 SC/08 Eximstats: whilst parsing the mainlog(s), store information about
5012 the messages in a hash of arrays rather than using individual hashes.
5013 This is a bit cleaner and results in dramatic memory savings, albeit
5014 at a slight CPU cost.
5016 SC/09 Eximstats: added the -show_rt<list> and the -show_dt<list> flags
5017 as requested by Marc Sherman.
5019 SC/10 Eximstats: added histograms for user specified patterns as requested
5022 SC/11 Eximstats: v1.43 - bugfix for pattern histograms with -h0 specified.
5024 PH/33 Patch from the Cygwin maintainer to add "b" to all occurences of
5025 fopen() in the content-scanning modules that did not already have it.
5031 TK/01 Added Yahoo DomainKeys support via libdomainkeys. See
5032 doc/experimental-spec.txt for details. (http://domainkeys.sf.net)
5034 TK/02 Fix ACL "control" statement not being available in MIME ACL.
5036 TK/03 Fix ACL "regex" condition not being available in MIME ACL.
5038 PH/01 Installed a patch from the Sieve maintainer that allows -bf to be used
5039 to test Sieve filters that use "vacation".
5041 PH/02 Installed a slightly modified version of Nikos Mavrogiannopoulos' patch
5042 that changes the way the GnuTLS parameters are stored in the cache file.
5043 The new format can be generated externally. For backward compatibility,
5044 if the data in the cache doesn't make sense, Exim assumes it has read an
5045 old-format file, and it generates new data and writes a new file. This
5046 means that you can't go back to an older release without removing the
5049 PH/03 A redirect router that has both "unseen" and "one_time" set does not
5050 work if there are any delivery delays because "one_time" forces the
5051 parent to be marked "delivered", so its unseen clone is never tried
5052 again. For this reason, Exim now forbids the simultaneous setting of
5055 PH/04 Change 4.11/85 fixed an obscure bug concerned with addresses that are
5056 redirected to themselves ("homonym" addresses). Read the long ChangeLog
5057 entry if you want to know the details. The fix, however, neglected to
5058 consider the case when local delivery batching is involved. The test for
5059 "previously delivered" was not happening when checking to see if an
5060 address could be batched with a previous (undelivered) one; under
5061 certain circumstances this could lead to multiple deliveries to the same
5064 PH/05 Renamed the macro SOCKLEN_T as EXIM_SOCKLEN_T because AIX uses SOCKLEN_T
5065 in its include files, and this causes problems building Exim.
5067 PH/06 A number of "verify =" ACL conditions have no options (e.g. verify =
5068 header_syntax) but Exim was just ignoring anything given after a slash.
5069 In particular, this caused confusion with an attempt to use "verify =
5070 reverse_host_lookup/defer_ok". An error is now given when options are
5071 supplied for verify items that do not have them. (Maybe reverse_host_
5072 lookup should have a defer_ok option, but that's a different point.)
5074 PH/07 Increase the size of the buffer for incoming SMTP commands from 512 (as
5075 defined by RFC 821) to 2048, because there were problems with some AUTH
5076 commands, and RFC 1869 says the size should be increased for extended
5077 SMTP commands that take arguments.
5079 PH/08 Added ${dlfunc dynamically loaded function for expansion (code from Tony
5082 PH/09 Previously, an attempt to use ${perl when it wasn't compiled gave an
5083 "unknown" error; now it says that the functionality isn't in the binary.
5085 PH/10 Added a nasty fudge to try to recognize and flatten LDAP passwords in
5086 an address' error message when a string expansion fails (syntax or
5087 whatever). Otherwise the password may appear in the log. Following change
5088 PH/42 below, there is no longer a chance of it appearing in a bounce
5091 PH/11 Installed exipick version 20050225.0 from John Jetmore.
5093 PH/12 If the last host in a fallback_hosts list was multihomed, only the first
5094 of its addresses was ever tried. (Bugzilla bug #2.)
5096 PH/13 If "headers_add" in a transport didn't end in a newline, Exim printed
5097 the result incorrectly in the debug output. (It correctly added a newline
5098 to what was transported.)
5100 TF/01 Added $received_time.
5102 PH/14 Modified the default configuration to add an acl_smtp_data ACL, with
5103 commented out examples of how to interface to a virus scanner and to
5104 SpamAssassin. Also added commented examples of av_scanner and
5105 spamd_address settings.
5107 PH/15 Further to TK/02 and TK/03 above, tidied up the tables of what conditions
5108 and controls are allowed in which ACLs. There were a couple of minor
5109 errors. Some of the entries in the conditions table (which is a table of
5110 where they are NOT allowed) were getting very unwieldy; rewrote them as a
5111 negation of where the condition IS allowed.
5113 PH/16 Installed updated OS/os.c-cygwin from the Cygwin maintainer.
5115 PH/17 The API for radiusclient changed at release 0.4.0. Unfortunately, the
5116 header file does not have a version number, so I've had to invent a new
5117 value for RADIUS_LIB_TYPE, namely "RADIUSCLIENTNEW" to request the new
5118 API. The code is untested by me (my Linux distribution still has 0.3.2 of
5119 radiusclient), but it was contributed by a Radius user.
5121 PH/18 Installed Lars Mainka's patch for the support of CRL collections in
5122 files or directories, for OpenSSL.
5124 PH/19 When an Exim process that is running as root has to create an Exim log
5125 file, it does so in a subprocess that runs as exim:exim so as to get the
5126 ownership right at creation (otherwise, other Exim processes might see
5127 the file with the wrong ownership). There was no test for failure of this
5128 fork() call, which would lead to the process getting stuck as it waited
5129 for a non-existent subprocess. Forks do occasionally fail when resources
5130 run out. I reviewed all the other calls to fork(); they all seem to check
5133 PH/20 When checking for unexpected SMTP input at connect time (before writing
5134 the banner), Exim was not dealing correctly with a non-positive return
5135 from the read() function. If the client had disconnected by this time,
5136 the result was a log entry for a synchronization error with an empty
5137 string after "input=" when read() returned zero. If read() returned -1
5138 (an event I could not check), uninitialized data bytes were printed.
5139 There were reports of junk text (parts of files, etc) appearing after
5142 PH/21 Added acl_not_smtp_mime to allow for MIME scanning for non-SMTP messages.
5144 PH/22 Added support for macro redefinition, and (re)definition in between
5145 driver and ACL definitions.
5147 PH/23 The cyrus_sasl authenticator was expanding server_hostname, but then
5148 forgetting to use the resulting value; it was using the unexpanded value.
5150 PH/24 The cyrus_sasl authenticator was advertising mechanisms for which it
5151 hadn't been configured. The fix is from Juergen Kreileder, who
5152 understands it better than I do:
5154 "Here's what I see happening with three configured cyrus_sasl
5155 authenticators configured (plain, login, cram-md5):
5157 On startup auth_cyrus_sasl_init() gets called for each of these.
5158 This means three calls to sasl_listmech() without a specified mech_list.
5159 => SASL tests which mechs of all available mechs actually work
5160 => three warnings about OTP not working
5161 => the returned list contains: plain, login, cram-md5, digest-md5, ...
5163 With the patch, sasl_listmech() also gets called three times. But now
5164 SASL's mech_list option is set to the server_mech specified in the the
5165 authenticator. Or in other words, the answer from sasl_listmech()
5166 gets limited to just the mech you're testing for (which is different
5168 => the return list contains just 'plain' or 'login', 'cram-md5' or
5169 nothing depending on the value of ob->server_mech.
5171 I've just tested the patch: Authentication still works fine,
5172 unavailable mechs specified in the exim configuration are still
5173 caught, and the auth.log warnings about OTP are gone."
5175 PH/25 When debugging is enabled, the contents of the command line are added
5176 to the debugging output, even when log_selector=+arguments is not
5179 PH/26 Change scripts/os-type so that when "uname -s" returns just "GNU", the
5180 answer is "GNU", and only if the return is "GNU/something" is the answer
5183 PH/27 $acl_verify_message is now set immediately after the failure of a
5184 verification in an ACL, and so is available in subsequent modifiers. In
5185 particular, the message can be preserved by coding like this:
5187 warn !verify = sender
5188 set acl_m0 = $acl_verify_message
5190 Previously, $acl_verify_message was set only while expanding "message"
5191 and "log_message" when a very denied access.
5193 PH/28 Modified OS/os.c-Linux with
5195 -#ifndef OS_LOAD_AVERAGE
5196 +#if !defined(OS_LOAD_AVERAGE) && defined(__linux__)
5198 to make Exim compile on kfreebsd-gnu. (I'm totally confused about the
5199 nomenclature these days.)
5201 PH/29 Installed patch from the Sieve maintainer that adds the options
5202 sieve_useraddress and sieve_subaddress to the redirect router.
5204 PH/30 In these circumstances:
5205 . Two addresses routed to the same list of hosts;
5206 . First host does not offer TLS;
5207 . First host accepts first address;
5208 . First host gives temporary error to second address;
5209 . Second host offers TLS and a TLS session is established;
5210 . Second host accepts second address.
5211 Exim incorrectly logged both deliveries with the TLS parameters (cipher
5212 and peerdn, if requested) that were in fact used only for the second
5215 PH/31 When doing a callout as part of verifying an address, Exim was not paying
5216 attention to any local part prefix or suffix that was matched by the
5217 router that accepted the address. It now behaves in the same way as it
5218 does for delivery: the affixes are removed from the local part unless
5219 rcpt_include_affixes is set on the transport.
5221 PH/32 Add the sender address, as F=<...>, to the log line when logging a
5222 timeout during the DATA phase of an incoming message.
5224 PH/33 Sieve envelope tests were broken for match types other than :is. I have
5225 applied a patch sanctioned by the Sieve maintainer.
5227 PH/34 Change 4.50/80 broke Exim in that it could no longer handle cases where
5228 the uid or gid is negative. A case of a negative gid caused this to be
5229 noticed. The fix allows for either to be negative.
5231 PH/35 ACL_WHERE_MIME is now declared unconditionally, to avoid too much code
5232 clutter, but the tables that are indexed by ACL_WHERE_xxx values had been
5235 PH/36 The change PH/12 above was broken. Fixed it.
5237 PH/37 Exim used to check for duplicate addresses in the middle of routing, on
5238 the grounds that routing the same address twice would always produce the
5239 same answer. This might have been true once, but it is certainly no
5240 longer true now. Routing a child address may depend on the previous
5241 routing that produced that child. Some complicated redirection strategies
5242 went wrong when messages had multiple recipients, and made Exim's
5243 behaviour dependent on the order in which the addresses were given.
5245 I have moved the duplicate checking until after the routing is complete.
5246 Exim scans the addresses that are assigned to local and remote
5247 transports, and removes any duplicates. This means that more work will be
5248 done, as duplicates will always all be routed, but duplicates are
5249 presumably rare, so I don't expect this is of any significance.
5251 For deliveries to pipes, files, and autoreplies, the duplicate checking
5252 still happens during the routing process, since they are not going to be
5255 PH/38 Installed a patch from Ian Freislich, with the agreement of Tom Kistner.
5256 It corrects a timeout issue with spamd. This is Ian's comment: "The
5257 background is that sometimes spamd either never reads data from a
5258 connection it has accepted, or it never writes response data. The exiscan
5259 spam.[ch] uses a 3600 second timeout on spamd socket reads, further, it
5260 blindly assumes that writes won't block so it may never time out."
5262 PH/39 Allow G after quota size as well as K and M.
5264 PH/40 The value set for $authenticated_id in an authenticator may not contain
5265 binary zeroes or newlines because the value is written to log lines and
5266 to spool files. There was no check on this. Now the value is run through
5267 the string_printing() function so that such characters are converted to
5268 printable escape sequences.
5270 PH/41 $message_linecount is a new variable that contains the total number of
5271 lines in the message. Compare $body_linecount, which is the count for the
5274 PH/42 Exim no longer gives details of delivery errors for specific addresses in
5275 bounce and delay warning messages, except in certain special cases, which
5278 (a) An SMTP error message from a remote host;
5279 (b) A message specified in a :fail: redirection;
5280 (c) A message specified in a "fail" command in a system filter;
5281 (d) A message specified in a FAIL return from the queryprogram router;
5282 (e) A message specified by the cannot_route_message router option.
5284 In these cases only, Exim does include the error details in bounce and
5285 warning messages. There are also a few cases where bland messages such
5286 as "unrouteable address" or "local delivery error" are given.
5288 PH/43 $value is now also set for the "else" part of a ${run expansion.
5290 PH/44 Applied patch from the Sieve maintainer: "The vacation draft is still
5291 being worked on, but at least Exim now implements the latest version to
5294 PH/45 In a pipe transport, although a timeout while waiting for the pipe
5295 process to complete was treated as a delivery failure, a timeout while
5296 writing the message to the pipe was logged, but erroneously treated as a
5297 successful delivery. Such timeouts include transport filter timeouts. For
5298 consistency with the overall process timeout, these timeouts are now
5299 treated as errors, giving rise to delivery failures by default. However,
5300 there is now a new Boolean option for the pipe transport called
5301 timeout_defer, which, if set TRUE, converts the failures into defers for
5302 both kinds of timeout. A transport filter timeout is now identified in
5305 PH/46 The "scripts/Configure-config.h" script calls "make" at one point. On
5306 systems where "make" and "gmake" are different, calling "gmake" at top
5307 level broke things. I've arranged for the value of $(MAKE) to be passed
5308 from the Makefile to this script so that it can call the same version of
5312 A note about Exim versions 4.44 and 4.50
5313 ----------------------------------------
5315 Exim 4.50 was meant to be the next release after 4.43. It contains a lot of
5316 changes of various kinds. As a consequence, a big documentation update was
5317 needed. This delayed the release for rather longer than seemed good, especially
5318 in the light of a couple of (minor) security issues. Therefore, the changes
5319 that fixed bugs were backported into 4.43, to create a 4.44 maintenance
5320 release. So 4.44 and 4.50 are in effect two different branches that both start
5323 I have left the 4.50 change log unchanged; it contains all the changes since
5324 4.43. The change log for 4.44 is below; many of its items are identical to
5325 those for 4.50. This seems to be the most sensible way to preserve the
5326 historical information.
5332 1. Minor wording change to the doc/README.SIEVE file.
5334 2. Change 4.43/35 introduced a bug: if quota_filecount was set, the
5335 computation of the current number of files was incorrect.
5337 3. Closing a stable door: arrange to panic-die if setitimer() ever fails. The
5338 bug fixed in 4.43/37 would have been diagnosed quickly if this had been in
5341 4. Give more explanation in the error message when the command for a transport
5342 filter fails to execute.
5344 5. There are several places where Exim runs a non-Exim command in a
5345 subprocess. The SIGUSR1 signal should be disabled for these processes. This
5346 was being done only for the command run by the queryprogram router. It is
5347 now done for all such subprocesses. The other cases are: ${run, transport
5348 filters, and the commands run by the lmtp and pipe transports.
5350 6. Added CONFIGURE_GROUP build-time option.
5352 7. Some older OS have a limit of 256 on the maximum number of file
5353 descriptors. Exim was using setrlimit() to set 1000 as a large value
5354 unlikely to be exceeded. Change 4.43/17 caused a lot of logging on these
5355 systems. I've change it so that if it can't get 1000, it tries for 256.
5357 8. "control=submission" was allowed, but had no effect, in a DATA ACL. This
5358 was an oversight, and furthermore, ever since the addition of extra
5359 controls (e.g. 4.43/32), the checks on when to allow different forms of
5360 "control" were broken. There should now be diagnostics for all cases when a
5361 control that does not make sense is encountered.
5363 9. Added the /retain_sender option to "control=submission".
5365 10. $recipients is now available in the predata ACL (oversight).
5367 11. Tidy the search cache before the fork to do a delivery from a message
5368 received from the command line. Otherwise the child will trigger a lookup
5369 failure and thereby defer the delivery if it tries to use (for example) a
5370 cached ldap connection that the parent has called unbind on.
5372 12. If verify=recipient was followed by verify=sender in a RCPT ACL, the value
5373 of $address_data from the recipient verification was clobbered by the
5374 sender verification.
5376 13. The value of address_data from a sender verification is now available in
5377 $sender_address_data in subsequent conditions in the ACL statement.
5379 14. Added forbid_sieve_filter and forbid_exim_filter to the redirect router.
5381 15. Added a new option "connect=<time>" to callout options, to set a different
5384 16. If FIXED_NEVER_USERS was defined, but empty, Exim was assuming the uid 0
5385 was its contents. (It was OK if the option was not defined at all.)
5387 17. A "Completed" log line is now written for messages that are removed from
5388 the spool by the -Mrm option.
5390 18. New variables $sender_verify_failure and $recipient_verify_failure contain
5391 information about exactly what failed.
5393 19. Added -dd to debug only the daemon process.
5395 20. Incorporated Michael Haardt's patch to ldap.c for improving the way it
5396 handles timeouts, both on the server side and network timeouts. Renamed the
5397 CONNECT parameter as NETTIMEOUT (but kept the old name for compatibility).
5399 21. The rare case of EHLO->STARTTLS->HELO was setting the protocol to "smtp".
5400 It is now set to "smtps".
5402 22. $host_address is now set to the target address during the checking of
5403 ignore_target_hosts.
5405 23. When checking ignore_target_hosts for an ipliteral router, no host name was
5406 being passed; this would have caused $sender_host_name to have been used if
5407 matching the list had actually called for a host name (not very likely,
5408 since this list is usually IP addresses). A host name is now passed as
5411 24. Changed the calls that set up the SIGCHLD handler in the daemon to use the
5412 code that specifies a non-restarting handler (typically sigaction() in
5413 modern systems) in an attempt to fix a rare and obscure crash bug.
5415 25. Narrowed the window for a race in the daemon that could cause it to ignore
5416 SIGCHLD signals. This is not a major problem, because they are used only to
5417 wake it up if nothing else does.
5419 26. A malformed maildirsize file could cause Exim to calculate negative values
5420 for the mailbox size or file count. Odd effects could occur as a result.
5421 The maildirsize information is now recalculated if the size or filecount
5424 27. Added HAVE_SYS_STATVFS_H to the os.h file for Linux, as it has had this
5425 support for a long time. Removed HAVE_SYS_VFS_H.
5427 28. Installed the latest version of exipick from John Jetmore.
5429 29. In an address list, if the pattern was not a regular expression, an empty
5430 subject address (from a bounce message) matched only if the pattern was an
5431 empty string. Non-empty patterns were not even tested. This was the wrong
5432 because it is perfectly reasonable to use an empty address as part of a
5433 database query. An empty address is now tested by patterns that are
5434 lookups. However, all the other forms of pattern expect the subject to
5435 contain a local part and a domain, and therefore, for them, an empty
5436 address still always fails if the pattern is not itself empty.
5438 30. Exim went into a mad DNS loop when attempting to do a callout where the
5439 host was specified on an smtp transport, and looking it up yielded more
5440 than one IP address.
5442 31. Re-factored the code for checking spool and log partition space into a
5443 function that finds that data and another that does the check. The former
5444 is then used to implement four new variables: $spool_space, $log_space,
5445 $spool_inodes, and $log_inodes.
5447 32. The RFC2047 encoding function was originally intended for short strings
5448 such as real names; it was not keeping to the 75-character limit for
5449 encoded words that the RFC imposes. It now respects the limit, and
5450 generates multiple encoded words if necessary. To be on the safe side, I
5451 have increased the buffer size for the ${rfc2047: expansion operator from
5454 33. It is now permitted to omit both strings after an "if" condition; if the
5455 condition is true, the result is "true". As before, when the second string
5456 is omitted, a false condition yields an empty string. This makes it less
5457 cumbersome to write custom ACL and router conditions.
5459 34. Failure to deliver a bounce message always caused it to be frozen, even if
5460 there was an errors_to setting on the router. The errors_to setting is now
5463 35. If an IPv6 address is given for -bh or -bhc, it is now converted to the
5464 canonical form (fully expanded) before being placed in
5465 $sender_host_address.
5467 36. The table in the code that translates DNS record types into text (T_A to
5468 "A" for instance) was missing entries for NS and CNAME. It is just possible
5469 that this could have caused confusion if both these types were looked up
5470 for the same domain, because the text type is used as part of Exim's
5471 per-process caching. But the chance of anyone hitting this buglet seems
5474 37. The dnsdb lookup has been extended in a number of ways.
5476 (1) There is a new type, "zns", which walks up the domain tree until it
5477 finds some nameserver records. It should be used with care.
5479 (2) There is a new type, "mxh", which is like "mx" except that it returns
5480 just the host names, not the priorities.
5482 (3) It is now possible to give a list of domains (or IP addresses) to be
5483 looked up. The behaviour when one of the lookups defers can be
5484 controlled by a keyword.
5486 (4) It is now possible to specify the separator character for use when
5487 multiple records are returned.
5489 38. The dnslists ACL condition has been extended: it is now possible to supply
5490 a list of IP addresses and/or domains to be looked up in a particular DNS
5493 39. Added log_selector=+queue_time_overall.
5495 40. When running the queue in the test harness, wait just a tad after forking a
5496 delivery process, to get repeatability of debugging output.
5498 41. Include certificate and key file names in error message when GnuTLS fails
5499 to set them up, because the GnuTLS error message doesn't include the name
5500 of the failing file when there is a problem reading it.
5502 42. Allow both -bf and -bF in the same test run.
5504 43. Did the same fix as 41 above for OpenSSL, which had the same infelicity.
5506 44. The "Exiscan patch" is now merged into the mainline Exim source.
5508 45. Sometimes the final signoff response after QUIT could fail to get
5509 transmitted in the non-TLS case. Testing !tls_active instead of tls_active
5510 < 0 before doing a fflush(). This bug looks as though it goes back to the
5511 introduction of TLS in release 3.20, but "sometimes" must have been rare
5512 because the tests only now provoked it.
5514 46. Reset the locale to "C" after calling embedded Perl, in case it was changed
5515 (this can affect the format of dates).
5517 47. exim_tidydb, when checking for the continued existence of a message for
5518 which it has found a message-specific retry record, was not finding
5519 messages that were in split spool directories. Consequently, it was
5520 deleting retry records that should have stayed in existence.
5522 48. Steve fixed some bugs in eximstats.
5524 49. The SPA authentication driver was not abandoning authentication and moving
5525 on to the next authenticator when an expansion was forced to fail,
5526 contradicting the general specification for all authenticators. Instead it
5527 was generating a temporary error. It now behaves as specified.
5529 50. The default ordering of permitted cipher suites for GnuTLS was pessimal
5530 (the order specifies the preference for clients). The order is now AES256,
5531 AES128, 3DES, ARCFOUR128.
5533 51. Small patch to Sieve code - explicitly set From: when generating an
5536 52. Exim crashed if a remote delivery caused a very long error message to be
5537 recorded - for instance if somebody sent an entire SpamAssassin report back
5538 as a large number of 550 error lines. This bug was coincidentally fixed by
5539 increasing the size of one of Exim's internal buffers (big_buffer) that
5540 happened as part of the Exiscan merge. However, to be on the safe side, I
5541 have made the code more robust (and fixed the comments that describe what
5544 53. Now that there can be additional text after "Completed" in log lines (if
5545 the queue_time_overall log selector is set), a one-byte patch to exigrep
5546 was needed to allow it to recognize "Completed" as not the last thing in
5549 54. The LDAP lookup was not handling a return of LDAP_RES_SEARCH_REFERENCE. A
5550 patch that reportedly fixes this has been added. I am not expert enough to
5551 create a test for it. This is what the patch creator wrote:
5553 "I found a little strange behaviour of ldap code when working with
5554 Windows 2003 AD Domain, where users was placed in more than one
5555 Organization Units. When I tried to give exim partial DN, the exit code
5556 of ldap_search was unknown to exim because of LDAP_RES_SEARCH_REFERENCE.
5557 But simultaneously result of request was absolutely normal ldap result,
5558 so I produce this patch..."
5560 Later: it seems that not all versions of LDAP support LDAP_RES_SEARCH_
5561 REFERENCE, so I have modified the code to exclude the patch when that macro
5564 55. Some experimental protocols are using DNS PTR records for new purposes. The
5565 keys for these records are domain names, not reversed IP addresses. The
5566 dnsdb PTR lookup now tests whether its key is an IP address. If not, it
5567 leaves it alone. Component reversal etc. now happens only for IP addresses.
5570 56. Improve error message when ldap_search() fails in OpenLDAP or Solaris LDAP.
5572 57. Double the size of the debug message buffer (to 2048) so that more of very
5573 long debug lines gets shown.
5575 58. The exicyclog utility now does better if the number of log files to keep
5576 exceeds 99. In this case, it numbers them 001, 002 ... instead of 01, 02...
5578 59. Two changes related to the smtp_active_hostname option:
5580 (1) $smtp_active_hostname is now available as a variable.
5581 (2) The default for smtp_banner uses $smtp_active_hostname instead
5582 of $primary_hostname.
5584 60. The host_aton() function is supposed to be passed a string that is known
5585 to be a valid IP address. However, in the case of IPv6 addresses, it was
5586 not checking this. This is a hostage to fortune. Exim now panics and dies
5587 if the condition is not met. A case was found where this could be provoked
5588 from a dnsdb PTR lookup with an IPv6 address that had more than 8
5589 components; fortuitously, this particular loophole had already been fixed
5590 by change 4.50/55 above.
5592 If there are any other similar loopholes, the new check in host_aton()
5593 itself should stop them being exploited. The report I received stated that
5594 data on the command line could provoke the exploit when Exim was running as
5595 exim, but did not say which command line option was involved. All I could
5596 find was the use of -be with a bad dnsdb PTR lookup, and in that case it is
5597 running as the user.
5600 61. There was a buffer overflow vulnerability in the SPA authentication code
5601 (which came originally from the Samba project). I have added a test to the
5602 spa_base64_to_bits() function which I hope fixes it.
5605 62. Configuration update for GNU/Hurd and variations. Updated Makefile-GNU and
5606 os.h-GNU, and added configuration files for GNUkFreeBSD and GNUkNetBSD.
5608 63. The daemon start-up calls getloadavg() while still root for those OS that
5609 need the first call to be done as root, but it missed one case: when
5610 deliver_queue_load_max is set with deliver_drop_privilege. This is
5611 necessary for the benefit of the queue runner, because there is no re-exec
5612 when deliver_drop_privilege is set.
5614 64. A call to exiwhat cut short delays set up by "delay" modifiers in ACLs.
5615 This has been fixed.
5617 65. Caching of lookup data for "hosts =" ACL conditions, when a named host list
5618 was in use, was not putting the data itself into the right store pool;
5619 consequently, it could be overwritten for a subsequent message in the same
5620 SMTP connection. (Fix 4.40/11 dealt with the non-cache case, but overlooked
5623 66. Added hosts_max_try_hardlimit to the smtp transport, default 50.
5625 67. The string_is_ip_address() function returns 0, 4, or 6, for "no an IP
5626 address", "IPv4 address", and "IPv6 address", respectively. Some calls of
5627 the function were treating the return as a boolean value, which happened to
5628 work because 0=false and not-0=true, but is not correct code.
5630 68. The host_aton() function was not handling scoped IPv6 addresses (those
5631 with, for example, "%eth0" on the end) correctly.
5633 69. Fixed some compiler warnings in acl.c for the bitmaps specified with
5634 negated items (that is, ~something) in unsigned ints. Some compilers
5635 apparently mutter when there is no cast.
5637 70. If an address verification called from an ACL failed, and did not produce a
5638 user-specific message (i.e. there was only a "system" message), nothing was
5639 put in $acl_verify_message. In this situation, it now puts the system
5642 71. Change 4.23/11 added synchronization checking at the start of an SMTP
5643 session; change 4.31/43 added the unwanted input to the log line - except
5644 that it did not do this in the start of session case. It now does.
5646 72. After a timeout in a callout SMTP session, Exim still sent a QUIT command.
5647 This is wrong and can cause the other end to generate a synchronization
5648 error if it is another Exim or anything else that does the synchronization
5649 check. A QUIT command is no longer sent after a timeout.
5651 73. $host_lookup_deferred has been added, to make it easier to detect DEFERs
5652 during host lookups.
5654 74. The defer_ok option of callout verification was not working if it was used
5655 when verifying addresses in header lines, that is, for this case:
5657 verify = header_sender/callout=defer_ok
5659 75. A backgrounded daemon closed stdin/stdout/stderr on entry; this meant that
5660 those file descriptors could be used for SMTP connections. If anything
5661 wrote to stderr (the example that came up was "warn" in embedded Perl), it
5662 could be sent to the SMTP client, causing chaos. The daemon now opens
5663 stdin, stdout, and stderr to /dev/null when it puts itself into the
5666 76. Arrange for output from Perl's "warn" command to be written to Exim's main
5667 log by default. The user can override this with suitable Perl magic.
5669 77. The use of log_message on a "discard" ACL verb, which is supposed to add to
5670 the log message when discard triggers, was not working for the DATA ACL or
5671 for the non-SMTP ACL.
5673 78. Error message wording change in sieve.c.
5675 79. If smtp_accept_max_per_host was set, the number of connections could be
5676 restricted to fewer than expected, because the daemon was trying to set up
5677 a new connection before checking whether the processes handling previous
5678 connections had finished. The check for completed processes is now done
5679 earlier. On busy systems, this bug wouldn't be noticed because something
5680 else would have woken the daemon, and it would have reaped the completed
5683 80. If a message was submitted locally by a user whose login name contained one
5684 or more spaces (ugh!), the spool file that Exim wrote was not re-readable.
5685 It caused a spool format error. I have fixed the spool reading code. A
5686 related problem was that the "from" clause in the Received: line became
5687 illegal because of the space(s). It is now covered by ${quote_local_part.
5689 81. Included the latest eximstats from Steve (adds average sizes to HTML Top
5692 82. Updated OS/Makefile-AIX as per message from Mike Meredith.
5694 83. Patch from Sieve maintainer to fix unterminated string problem in
5695 "vacation" handling.
5697 84. Some minor changes to the Linux configuration files to help with other
5698 OS variants using glibc.
5700 85. One more patch for Sieve to update vacation handling to latest spec.
5703 ----------------------------------------------------
5704 See the note above about the 4.44 and 4.50 releases.
5705 ----------------------------------------------------
5711 1. Change 4.43/35 introduced a bug that caused file counts to be
5712 incorrectly computed when quota_filecount was set in an appendfile
5715 2. Closing a stable door: arrange to panic-die if setitimer() ever fails. The
5716 bug fixed in 4.43/37 would have been diagnosed quickly if this had been in
5719 3. Give more explanation in the error message when the command for a transport
5720 filter fails to execute.
5722 4. There are several places where Exim runs a non-Exim command in a
5723 subprocess. The SIGUSR1 signal should be disabled for these processes. This
5724 was being done only for the command run by the queryprogram router. It is
5725 now done for all such subprocesses. The other cases are: ${run, transport
5726 filters, and the commands run by the lmtp and pipe transports.
5728 5. Some older OS have a limit of 256 on the maximum number of file
5729 descriptors. Exim was using setrlimit() to set 1000 as a large value
5730 unlikely to be exceeded. Change 4.43/17 caused a lot of logging on these
5731 systems. I've change it so that if it can't get 1000, it tries for 256.
5733 6. "control=submission" was allowed, but had no effect, in a DATA ACL. This
5734 was an oversight, and furthermore, ever since the addition of extra
5735 controls (e.g. 4.43/32), the checks on when to allow different forms of
5736 "control" were broken. There should now be diagnostics for all cases when a
5737 control that does not make sense is encountered.
5739 7. $recipients is now available in the predata ACL (oversight).
5741 8. Tidy the search cache before the fork to do a delivery from a message
5742 received from the command line. Otherwise the child will trigger a lookup
5743 failure and thereby defer the delivery if it tries to use (for example) a
5744 cached ldap connection that the parent has called unbind on.
5746 9. If verify=recipient was followed by verify=sender in a RCPT ACL, the value
5747 of $address_data from the recipient verification was clobbered by the
5748 sender verification.
5750 10. If FIXED_NEVER_USERS was defined, but empty, Exim was assuming the uid 0
5751 was its contents. (It was OK if the option was not defined at all.)
5753 11. A "Completed" log line is now written for messages that are removed from
5754 the spool by the -Mrm option.
5756 12. $host_address is now set to the target address during the checking of
5757 ignore_target_hosts.
5759 13. When checking ignore_target_hosts for an ipliteral router, no host name was
5760 being passed; this would have caused $sender_host_name to have been used if
5761 matching the list had actually called for a host name (not very likely,
5762 since this list is usually IP addresses). A host name is now passed as
5765 14. Changed the calls that set up the SIGCHLD handler in the daemon to use the
5766 code that specifies a non-restarting handler (typically sigaction() in
5767 modern systems) in an attempt to fix a rare and obscure crash bug.
5769 15. Narrowed the window for a race in the daemon that could cause it to ignore
5770 SIGCHLD signals. This is not a major problem, because they are used only to
5771 wake it up if nothing else does.
5773 16. A malformed maildirsize file could cause Exim to calculate negative values
5774 for the mailbox size or file count. Odd effects could occur as a result.
5775 The maildirsize information is now recalculated if the size or filecount
5778 17. Added HAVE_SYS_STATVFS_H to the os.h file for Linux, as it has had this
5779 support for a long time. Removed HAVE_SYS_VFS_H.
5781 18. Updated exipick to current release from John Jetmore.
5783 19. Allow an empty sender to be matched against a lookup in an address list.
5784 Previously the only cases considered were a regular expression, or an
5787 20. Exim went into a mad DNS lookup loop when doing a callout where the
5788 host was specified on the transport, if the DNS lookup yielded more than
5791 21. The RFC2047 encoding function was originally intended for short strings
5792 such as real names; it was not keeping to the 75-character limit for
5793 encoded words that the RFC imposes. It now respects the limit, and
5794 generates multiple encoded words if necessary. To be on the safe side, I
5795 have increased the buffer size for the ${rfc2047: expansion operator from
5798 22. Failure to deliver a bounce message always caused it to be frozen, even if
5799 there was an errors_to setting on the router. The errors_to setting is now
5802 23. If an IPv6 address is given for -bh or -bhc, it is now converted to the
5803 canonical form (fully expanded) before being placed in
5804 $sender_host_address.
5806 24. Updated eximstats to version 1.33
5808 25. Include certificate and key file names in error message when GnuTLS fails
5809 to set them up, because the GnuTLS error message doesn't include the name
5810 of the failing file when there is a problem reading it.
5812 26. Expand error message when OpenSSL has problems setting up cert/key files.
5815 27. Reset the locale to "C" after calling embedded Perl, in case it was changed
5816 (this can affect the format of dates).
5818 28. exim_tidydb, when checking for the continued existence of a message for
5819 which it has found a message-specific retry record, was not finding
5820 messages that were in split spool directories. Consequently, it was
5821 deleting retry records that should have stayed in existence.
5823 29. eximstats updated to version 1.35
5824 1.34 - allow eximstats to parse syslog lines as well as mainlog lines
5825 1.35 - bugfix such that pie charts by volume are generated correctly
5827 30. The SPA authentication driver was not abandoning authentication and moving
5828 on to the next authenticator when an expansion was forced to fail,
5829 contradicting the general specification for all authenticators. Instead it
5830 was generating a temporary error. It now behaves as specified.
5832 31. The default ordering of permitted cipher suites for GnuTLS was pessimal
5833 (the order specifies the preference for clients). The order is now AES256,
5834 AES128, 3DES, ARCFOUR128.
5836 31. Small patch to Sieve code - explicitly set From: when generating an
5839 32. Exim crashed if a remote delivery caused a very long error message to be
5840 recorded - for instance if somebody sent an entire SpamAssassin report back
5841 as a large number of 550 error lines. This bug was coincidentally fixed by
5842 increasing the size of one of Exim's internal buffers (big_buffer) that
5843 happened as part of the Exiscan merge. However, to be on the safe side, I
5844 have made the code more robust (and fixed the comments that describe what
5847 33. Some experimental protocols are using DNS PTR records for new purposes. The
5848 keys for these records are domain names, not reversed IP addresses. The
5849 dnsdb PTR lookup now tests whether its key is an IP address. If not, it
5850 leaves it alone. Component reversal etc. now happens only for IP addresses.
5853 34. The host_aton() function is supposed to be passed a string that is known
5854 to be a valid IP address. However, in the case of IPv6 addresses, it was
5855 not checking this. This is a hostage to fortune. Exim now panics and dies
5856 if the condition is not met. A case was found where this could be provoked
5857 from a dnsdb PTR lookup with an IPv6 address that had more than 8
5858 components; fortuitously, this particular loophole had already been fixed
5859 by change 4.50/55 or 4.44/33 above.
5861 If there are any other similar loopholes, the new check in host_aton()
5862 itself should stop them being exploited. The report I received stated that
5863 data on the command line could provoke the exploit when Exim was running as
5864 exim, but did not say which command line option was involved. All I could
5865 find was the use of -be with a bad dnsdb PTR lookup, and in that case it is
5866 running as the user.
5869 35. There was a buffer overflow vulnerability in the SPA authentication code
5870 (which came originally from the Samba project). I have added a test to the
5871 spa_base64_to_bits() function which I hope fixes it.
5874 36. The daemon start-up calls getloadavg() while still root for those OS that
5875 need the first call to be done as root, but it missed one case: when
5876 deliver_queue_load_max is set with deliver_drop_privilege. This is
5877 necessary for the benefit of the queue runner, because there is no re-exec
5878 when deliver_drop_privilege is set.
5880 37. Caching of lookup data for "hosts =" ACL conditions, when a named host list
5881 was in use, was not putting the data itself into the right store pool;
5882 consequently, it could be overwritten for a subsequent message in the same
5883 SMTP connection. (Fix 4.40/11 dealt with the non-cache case, but overlooked
5886 38. Sometimes the final signoff response after QUIT could fail to get
5887 transmitted in the non-TLS case. Testing !tls_active instead of tls_active
5888 < 0 before doing a fflush(). This bug looks as though it goes back to the
5889 introduction of TLS in release 3.20, but "sometimes" must have been rare
5890 because the tests only now provoked it.
5896 1. Fixed a longstanding but relatively impotent bug: a long time ago, before
5897 PIPELINING, the function smtp_write_command() used to return TRUE or FALSE.
5898 Now it returns an integer. A number of calls were still expecting a T/F
5899 return. Fortuitously, in all cases, the tests worked in OK situations,
5900 which is the norm. However, things would have gone wrong on any write
5901 failures on the smtp file descriptor. This function is used when sending
5902 messages over SMTP and also when doing verify callouts.
5904 2. When Exim is called to do synchronous delivery of a locally submitted
5905 message (the -odf or -odi options), it no longer closes stderr before doing
5908 3. Implemented the mua_wrapper option.
5910 4. Implemented mx_fail_domains and srv_fail_domains for the dnslookup router.
5912 5. Implemented the functions header_remove(), header_testname(),
5913 header_add_at_position(), and receive_remove_recipient(), and exported them
5916 6. If an ACL "warn" statement specified the addition of headers, Exim already
5917 inserted X-ACL-Warn: at the start if there was no header name. However, it
5918 was not making this test for the second and subsequent header lines if
5919 there were newlines in the string. This meant that an invalid header could
5920 be inserted if Exim was badly configured.
5922 7. Allow an ACL "warn" statement to add header lines at the start or after all
5923 the Received: headers, as well as at the end.
5925 8. Added the rcpt_4xx retry error code.
5927 9. Added postmaster_mailfrom=xxx to callout verification option.
5929 10. Added mailfrom=xxxx to the callout verification option, for verify=
5932 11. ${substr_1_:xxxx} and ${substr__3:xxxx} are now diagnosed as syntax errors
5933 (they previously behaved as ${substr_1_0:xxxx} and ${substr:_0_3:xxxx}).
5935 12. Inserted some casts to stop certain compilers warning when using pointer
5936 differences as field lengths or precisions in printf-type calls (mostly
5937 affecting debugging statements).
5939 13. Added optional readline() support for -be (dynamically loaded).
5941 14. Obscure bug fix: if a message error (e.g. 4xx to MAIL) happened within the
5942 same clock tick as a message's arrival, so that its received time was the
5943 same as the "first fail" time on the retry record, and that message
5944 remained on the queue past the ultimate address timeout, every queue runner
5945 would try a delivery (because it was past the ultimate address timeout) but
5946 after another failure, the ultimate address timeout, which should have then
5947 bounced the address, did not kick in. This was a "< instead of <=" error;
5948 in most cases the first failure would have been in the next clock tick
5949 after the received time, and all would be well.
5951 15. The special items beginning with @ in domain lists (e.g. @mx_any) were not
5952 being recognized when the domain list was tested by the match_domain
5953 condition in an expansion string.
5955 16. Added the ${str2b64: operator.
5957 17. Exim was always calling setrlimit() to set a large limit for the number of
5958 processes, without checking whether the existing limit was already
5959 adequate. (It did check for the limit on file descriptors.) Furthermore,
5960 errors from getrlimit() and setrlimit() were being ignored. Now they are
5961 logged to the main and panic logs, but Exim does carry on, to try to do its
5962 job under whatever limits there are.
5964 18. Imported PCRE 5.0.
5966 19. Trivial typo in log message " temporarily refused connection" (the leading
5969 20. If the log selector return_path_on_delivery was set and an address was
5970 redirected to /dev/null, the delivery process crashed because it assumed
5971 that a return path would always be set for a "successful" delivery. In this
5972 case, the whole delivery is bypassed as an optimization, and therefore no
5975 21. Internal re-arrangement: the function for sending a challenge and reading
5976 a response while authentication was assuming a zero-terminated challenge
5977 string. It's now changed to take a pointer and a length, to allow for
5978 binary data in such strings.
5980 22. Added the cyrus_sasl authenticator (code supplied by MBM).
5982 23. Exim was not respecting finduser_retries when seeking the login of the
5983 uid under which it was called; it was always trying 10 times. (The default
5984 setting of finduser_retries is zero.) Also, it was sleeping after the final
5985 failure, which is pointless.
5987 24. Implemented tls_on_connect_ports.
5989 25. Implemented acl_smtp_predata.
5991 26. If the domain in control=submission is set empty, Exim assumes that the
5992 authenticated id is a complete email address when it generates From: or
5993 Sender: header lines.
5995 27. Added "#define SOCKLEN_T int" to OS/os.h-SCO and OS/os.h-SCO_SV. Also added
5996 definitions to OS/Makefile-SCO and OS/Makefile-SCO_SV that put basename,
5997 chown and chgrp in /bin and hostname in /usr/bin.
5999 28. Exim was keeping the "process log" file open after each use, just as it
6000 does for the main log. This opens the possibility of it remaining open for
6001 long periods when the USR1 signal hits a daemon. Occasional processlog
6002 errors were reported, that could have been caused by this. Anyway, it seems
6003 much more sensible not to leave this file open at all, so that is what now
6006 29. The long-running daemon process does not normally write to the log once it
6007 has entered its main loop, and it closes the log before doing so. This is
6008 so that log files can straightforwardly be renamed and moved. However,
6009 there are a couple of unusual error situations where the daemon does write
6010 log entries, and I had neglected to close the log afterwards.
6012 30. The text of an SMTP error response that was received during a remote
6013 delivery was being truncated at 512 bytes. This is too short for some of
6014 the long messages that one sometimes sees. I've increased the limit to
6017 31. It is now possible to make retry rules that apply only when a message has a
6018 specific sender, in particular, an empty sender.
6020 32. Added "control = enforce_sync" and "control = no_enforce_sync". This makes
6021 it possible to be selective about when SMTP synchronization is enforced.
6023 33. Added "control = caseful_local_part" and "control = "caselower_local_part".
6025 32. Implemented hosts_connection_nolog.
6027 33. Added an ACL for QUIT.
6029 34. Setting "delay_warning=" to disable warnings was not working; it gave a
6032 35. Added mailbox_size and mailbox_filecount to appendfile.
6034 36. Added control = no_multiline_responses to ACLs.
6036 37. There was a bug in the logic of the code that waits for the clock to tick
6037 in the case where the clock went backwards by a substantial amount such
6038 that the microsecond fraction of "now" was more than the microsecond
6039 fraction of "then" (but the whole seconds number was less).
6041 38. Added support for the libradius Radius client library this is found on
6042 FreeBSD (previously only the radiusclient library was supported).
6048 1. When certain lookups returned multiple values in the form name=value, the
6049 quoting of the values was not always being done properly. Specifically:
6050 (a) If the value started with a double quote, but contained no whitespace,
6052 (b) If the value contained whitespace other than a space character (i.e.
6053 tabs or newlines or carriage returns) it was not quoted.
6054 This fix has been applied to the mysql and pgsql lookups by writing a
6055 separate quoting function and calling it from the lookup code. The fix
6056 should probably also be applied to nisplus, ibase and oracle lookups, but
6057 since I cannot test any of those, I have not disturbed their existing code.
6059 2. A hit in the callout cache for a specific address caused a log line with no
6060 reason for rejecting RCPT. Now it says "Previous (cached) callout
6061 verification failure".
6063 3. There was an off-by-one bug in the queryprogram router. An over-long
6064 return line was truncated at 256 instead of 255 characters, thereby
6065 overflowing its buffer with the terminating zero. As well as fixing this, I
6066 have increased the buffer size to 1024 (and made a note to document this).
6068 4. If an interrupt, such as the USR1 signal that is send by exiwhat, arrives
6069 when Exim is waiting for an SMTP response from a remote server, Exim
6070 restarts its select() call on the socket, thereby resetting its timeout.
6071 This is not a problem when such interrupts are rare. Somebody set up a cron
6072 job to run exiwhat every 2 minutes, which is less than the normal select()
6073 timeout (5 or 10 minutes). This meant that the select() timeout never
6074 kicked in because it was always reset. I have fixed this by comparing the
6075 time when an interrupt arrives with the time at the start of the first call
6076 to select(). If more time than the timeout has elapsed, the interrupt is
6077 treated as a timeout.
6079 5. Some internal re-factoring in preparation for the addition of Sieve
6080 extensions (by MH). In particular, the "personal" test is moved to a
6081 separate function, and given an option for scanning Cc: and Bcc: (which is
6082 not set for Exim filters).
6084 6. When Exim created an email address using the login of the caller as the
6085 local part (e.g. when creating a From: or Sender: header line), it was not
6086 quoting the local part when it contained special characters such as @.
6088 7. Installed new OpenBSD configuration files.
6090 8. Reworded some messages for syntax errors in "and" and "or" conditions to
6091 try to make them clearer.
6093 9. Callout options, other than the timeout value, were being ignored when
6094 verifying sender addresses in header lines. For example, when using
6096 verify = header_sender/callout=no_cache
6098 the cache was (incorrectly) being used.
6100 10. Added a missing instance of ${EXE} to the exim_install script; this affects
6101 only the Cygwin environment.
6103 11. When return_path_on_delivery was set as a log selector, if different remote
6104 addresses in the same message used different return paths and parallel
6105 remote delivery occurred, the wrong values would sometimes be logged.
6106 (Whenever a remote delivery process finished, the return path value from
6107 the most recently started remote delivery process was logged.)
6109 12. RFC 3848 specifies standard names for the "with" phrase in Received: header
6110 lines when AUTH and/or TLS are in use. This is the "received protocol"
6111 field. Exim used to use "asmtp" for authenticated SMTP, without any
6112 indication (in the protocol name) for TLS use. Now it follows the RFC and
6113 uses "esmtpa" if the connection is authenticated, "esmtps" if it is
6114 encrypted, and "esmtpsa" if it is both encrypted and authenticated. These
6115 names appear in log lines as well as in Received: header lines.
6117 13. Installed MH's patches for Sieve to add the "copy" and "vacation"
6118 extensions, and comparison tests, and to fix some bugs.
6120 14. Changes to the "personal" filter test:
6122 (1) The test was buggy in that it was just doing the equivalent of
6123 "contains" tests on header lines. For example, if a user's address was
6124 anne@some.where, the "personal" test would incorrectly be true for
6126 To: susanne@some.where
6128 This test is now done by extracting each address from the header in turn,
6129 and checking the entire address. Other tests that are part of "personal"
6130 are now done using regular expressions (for example, to check local parts
6131 of addresses in From: header lines).
6133 (2) The list of non-personal local parts in From: addresses has been
6134 extended to include "listserv", "majordomo", "*-request", and "owner-*",
6135 taken from the Sieve specification recommendations.
6137 (3) If the message contains any header line starting with "List-" it is
6138 treated as non-personal.
6140 (4) The test for "circular" in the Subject: header line has been removed
6141 because it now seems ill-conceived.
6143 15. Minor typos in src/EDITME comments corrected.
6145 16. Installed latest exipick from John Jetmore.
6147 17. If headers_add on a router specified a text string that was too long for
6148 string_sprintf() - that is, longer than 8192 bytes - Exim panicked. The use
6149 of string_sprintf() is now avoided.
6151 18. $message_body_size was not set (it was always zero) when running the DATA
6152 ACL and the local_scan() function.
6154 19. For the "mail" command in an Exim filter, no default was being set for
6155 the once_repeat time, causing a random time value to be used if "once" was
6156 specified. (If the value happened to be <= 0, no repeat happened.) The
6157 default is now 0s, meaning "never repeat". The "vacation" command was OK
6158 (its default is 7d). It's somewhat surprising nobody ever noticed this bug
6159 (I found it when inspecting the code).
6161 20. There is now an overall timeout for performing a callout verification. It
6162 defaults to 4 times the callout timeout, which applies to individual SMTP
6163 commands during the callout. The overall timeout applies when there is more
6164 than one host that can be tried. The timeout is checked before trying the
6165 next host. This prevents very long delays if there are a large number of
6166 hosts and all are timing out (e.g. when the network connections are timing
6167 out). The value of the overall timeout can be changed by specifying an
6168 additional sub-option for "callout", called "maxwait". For example:
6170 verify = sender/callout=5s,maxwait=20s
6172 21. Add O_APPEND to the open() call for maildirsize files (Exim already seeks
6173 to the end before writing, but this should make it even safer).
6175 22. Exim was forgetting that it had advertised PIPELINING for the second and
6176 subsequent messages on an SMTP connection. It was also not resetting its
6177 memory on STARTTLS and an internal HELO.
6179 23. When Exim logs an SMTP synchronization error within a session, it now
6180 records whether PIPELINING has been advertised or not.
6182 24. Added 3 instances of "(long int)" casts to time_t variables that were being
6183 formatted using %ld, because on OpenBSD (and perhaps others), time_t is int
6184 rather than long int.
6186 25. Installed the latest Cygwin configuration files from the Cygwin maintainer.
6188 26. Added the never_mail option to autoreply.
6194 1. A reorganization of the code in order to implement 4.40/8 caused a daemon
6195 crash if the getsockname() call failed; this can happen if a connection is
6196 closed very soon after it is established. The problem was simply in the
6197 order in which certain operations were done, causing Exim to try to write
6198 to the SMTP stream before it had set up the file descriptor. The bug has
6199 been fixed by making things happen in the correct order.
6205 1. If "drop" was used in a DATA ACL, the SMTP output buffer was not flushed
6206 before the connection was closed, thus losing the rejection response.
6208 2. Commented out the definition of SOCKLEN_T in os.h-SunOS5. It is needed for
6209 some early Solaris releases, but causes trouble in current releases where
6210 socklen_t is defined.
6212 3. When std{in,out,err} are closed, re-open them to /dev/null so that they
6215 4. Minor refactoring of os.c-Linux to avoid compiler warning when IPv6 is not
6218 5. Refactoring in expand.c to improve memory usage. Pre-allocate a block so
6219 that releasing the top of it at the end releases what was used for sub-
6220 expansions (unless the block got too big). However, discard this block if
6221 the first thing is a variable or header, so that we can use its block when
6222 it is dynamic (useful for very large $message_headers, for example).
6224 6. Lookups now cache *every* query, not just the most recent. A new, separate
6225 store pool is used for this. It can be recovered when all lookup caches are
6226 flushed. Lookups now release memory at the end of their result strings.
6227 This has involved some general refactoring of the lookup sources.
6229 7. Some code has been added to the store_xxx() functions to reduce the amount
6230 of flapping under certain conditions.
6232 8. log_incoming_interface used to affect only the <= reception log lines. Now
6233 it causes the local interface and port to be added to several more SMTP log
6234 lines, for example "SMTP connection from", and rejection lines.
6236 9. The Sieve author supplied some patches for the doc/README.SIEVE file.
6238 10. Added a conditional definition of _BSD_SOCKLEN_T to os.h-Darwin.
6240 11. If $host_data was set by virtue of a hosts lookup in an ACL, its value
6241 could be overwritten at the end of the current message (or the start of a
6242 new message if it was set in a HELO ACL). The value is now preserved for
6243 the duration of the SMTP connection.
6245 12. If a transport had a headers_rewrite setting, and a matching header line
6246 contained an unqualified address, that address was qualified, even if it
6247 did not match any rewriting rules. The underlying bug was that the values
6248 of the flags that permit the existence of unqualified sender and recipient
6249 addresses in header lines (set by {sender,recipient}_unqualified_hosts for
6250 non-local messages, and by -bnq for local messages) were not being
6251 preserved with the message after it was received.
6253 13. When Exim was logging an SMTP synchronization error, it could sometimes log
6254 "next input=" as part of the text comprising the host identity instead of
6255 the correct text. The code was using the same buffer for two different
6256 strings. However, depending on which order the printing function evaluated
6257 its arguments, the bug did not always show up. Under Linux, for example, my
6258 test suite worked just fine.
6260 14. Exigrep contained a use of Perl's "our" scoping after change 4.31/70. This
6261 doesn't work with some older versions of Perl. It has been changed to "my",
6262 which in any case is probably the better facility to use.
6264 15. A really picky compiler found some instances of statements for creating
6265 error messages that either had too many or two few arguments for the format
6268 16. The size of the buffer for calls to the DNS resolver has been increased
6269 from 1024 to 2048. A larger buffer is needed when performing PTR lookups
6270 for addresses that have a lot of PTR records. This alleviates a problem; it
6271 does not fully solve it.
6273 17. A dnsdb lookup for PTR records that receives more data than will fit in the
6274 buffer now truncates the list and logs the incident, which is the same
6275 action as happens when Exim is looking up a host name and its aliases.
6276 Previously in this situation something unpredictable would happen;
6277 sometimes it was "internal error: store_reset failed".
6279 18. If a server dropped the connection unexpectedly when an Exim client was
6280 using GnuTLS and trying to read a response, the client delivery process
6281 crashed while trying to generate an error log message.
6283 19. If a "warn" verb in an ACL added multiple headers to a message in a single
6284 string, for example:
6286 warn message = H1: something\nH2: something
6288 the text was added as a single header line from Exim's point of view
6289 though it ended up OK in the delivered message. However, searching for the
6290 second and subsequent header lines using $h_h2: did not work. This has been
6291 fixed. Similarly, if a system filter added multiple headers in this way,
6292 the routers could not see them.
6294 20. Expanded the error message when iplsearch is called with an invalid key to
6295 suggest using net-iplsearch in a host list.
6297 21. When running tests using -bh, any delays imposed by "delay" modifiers in
6298 ACLs are no longer actually imposed (and a message to that effect is
6301 22. If a "gecos" field in a passwd entry contained escaped characters, in
6302 particular, if it contained a \" sequence, Exim got it wrong when building
6303 a From: or a Sender: header from that name. A second bug also caused
6304 incorrect handling when an unquoted " was present following a character
6305 that needed quoting.
6307 23. "{crypt}" as a password encryption mechanism for a "crypteq" expansion item
6308 was not being matched caselessly.
6310 24. Arranged for all hyphens in the exim.8 source to be escaped with
6313 25. Change 16 of 4.32, which reversed 71 or 4.31 didn't quite do the job
6314 properly. Recipient callout cache records were still being keyed to include
6315 the sender, even when use_sender was set false. This led to far more
6316 callouts that were necessary. The sender is no longer included in the key
6317 when use_sender is false.
6319 26. Added "control = submission" modifier to ACLs.
6321 27. Added the ${base62d: operator to decode base 62 numbers.
6323 28. dnsdb lookups can now access SRV records.
6325 29. CONFIGURE_OWNER can be set at build time to define an alternative owner for
6326 the configuration file.
6328 30. The debug message "delivering xxxxxx-xxxxxx-xx" is now output in verbose
6329 (-v) mode. This makes the output for a verbose queue run more intelligible.
6331 31. Added a use_postmaster feature to recipient callouts.
6333 32. Added the $body_zerocount variable, containing the number of binary zero
6334 bytes in the message body.
6336 33. The time of last modification of the "new" subdirectory is now used as the
6337 "mailbox time last read" when there is a quota error for a maildir
6340 34. Added string comparison operators lt, lti, le, lei, gt, gti, ge, gei.
6342 35. Added +ignore_unknown as a special item in host lists.
6344 36. Code for decoding IPv6 addresses in host lists is now included, even if
6345 IPv6 support is not being compiled. This fixes a bug in which an IPv6
6346 address was recognized as an IP address, but was then not correctly decoded
6347 into binary, causing unexpected and incorrect effects when compared with
6354 1. Very minor rewording of debugging text in manualroute to say "list of
6355 hosts" instead of "hostlist".
6357 2. If verify=header_syntax was set, and a header line with an unqualified
6358 address (no domain) and a large number of spaces between the end of the
6359 name and the colon was received, the reception process suffered a buffer
6360 overflow, and (when I tested it) crashed. This was caused by some obsolete
6361 code that should have been removed. The fix is to remove it!
6363 3. When running in the test harness, delay a bit after writing a bounce
6364 message to get a bit more predictability in the log output.
6366 4. Added a call to search_tidyup() just before forking a reception process. In
6367 theory, someone could use a lookup in the expansion of smtp_accept_max_
6368 per_host which, without the tidyup, could leave open a database connection.
6370 5. Added the variables $recipient_data and $sender_data which get set from a
6371 lookup success in an ACL "recipients" or "senders" condition, or a router
6372 "senders" option, similar to $domain_data and $local_part_data.
6374 6. Moved the writing of debug_print from before to after the "senders" test
6377 7. Change 4.31/66 (moving the time when the Received: is generated) caused
6378 problems for message scanning, either using a data ACL, or using
6379 local_scan() because the Received: header was not generated till after they
6380 were called (in order to set the time as the time of reception completion).
6381 I have revised the way this works. The header is now generated after the
6382 body is received, but before the ACL or local_scan() are called. After they
6383 are run, the timestamp in the header is updated.
6389 1. Change 4.24/6 introduced a bug because the SIGALRM handler was disabled
6390 before starting a queue runner without re-exec. This happened only when
6391 deliver_drop_privilege was set or when the Exim user was set to root. The
6392 effect of the bug was that timeouts during subsequent deliveries caused
6393 crashes instead of being properly handled. The handler is now left at its
6394 default (and expected) setting.
6396 2. The other case in which a daemon avoids a re-exec is to deliver an incoming
6397 message, again when deliver_drop_privilege is set or Exim is run as root.
6398 The bug described in (1) was not present in this case, but the tidying up
6399 of the other signals was missing. I have made the two cases consistent.
6401 3. The ignore_target_hosts setting on a manualroute router was being ignored
6402 for hosts that were looked up using the /MX notation.
6404 4. Added /ignore=<ip list> feature to @mx_any, @mx_primary, and @mx_secondary
6407 5. Change 4.31/55 was buggy, and broke when there was a rewriting rule that
6408 operated on the sender address. After changing the $sender_address to <>
6409 for the sender address verify, Exim was re-instated it as the original
6410 (before rewriting) address, but remembering that it had rewritten it, so it
6411 wasn't rewriting it again. This bug also had the effect of breaking the
6412 sender address verification caching when the sender address was rewritten.
6414 6. The ignore_target_hosts option was being ignored by the ipliteral router.
6415 This has been changed so that if the ip literal address matches
6416 ignore_target_hosts, the router declines.
6418 7. Added expansion conditions match_domain, match_address, and match_local_
6419 part (NOT match_host).
6421 8. The placeholder for the Received: header didn't have a length field set.
6423 9. Added code to Exim itself and to exim_lock to test for a specific race
6424 condition that could lead to file corruption when using MBX delivery. The
6425 issue is with the lockfile that is created in /tmp. If this file is removed
6426 after a process has opened it but before that process has acquired a lock,
6427 there is the potential for a second process to recreate the file and also
6428 acquire a lock. This could lead to two Exim processes writing to the file
6429 at the same time. The added code performs the same test as UW imapd; it
6430 checks after acquiring the lock that its file descriptor still refers to
6431 the same named file.
6433 10. The buffer for building added header lines was of fixed size, 8192 bytes.
6434 It is now parameterized by HEADER_ADD_BUFFER_SIZE and this can be adjusted
6437 11. Added the smtp_active_hostname option. If used, this will typically be made
6438 to depend on the incoming interface address. Because $interface_address is
6439 not set up until the daemon has forked a reception process, error responses
6440 that can happen earlier (such as "too many connections") no longer contain
6443 12. If an expansion in a condition on a "warn" statement fails because a lookup
6444 defers, the "warn" statement is abandoned, and the next ACL statement is
6445 processed. Previously this caused the whole ACL to be aborted.
6447 13. Added the iplsearch lookup type.
6449 14. Added ident_timeout as a log selector.
6451 15. Added tls_certificate_verified as a log selector.
6453 16. Added a global option tls_require_ciphers (compare the smtp transport
6454 option of the same name). This controls incoming TLS connections.
6456 17. I finally figured out how to make tls_require_ciphers do a similar thing
6457 in GNUtls to what it does in OpenSSL, that is, set up an appropriate list
6458 before starting the TLS session.
6460 18. Tabs are now shown as \t in -bP output.
6462 19. If the log selector return_path_on_delivery was set, Exim crashed when
6463 bouncing a message because it had too many Received: header lines.
6465 20. If two routers both had headers_remove settings, and the first one included
6466 a superfluous trailing colon, the final name in the first list and the
6467 first name in the second list were incorrectly joined into one item (with a
6468 colon in the middle).
6474 1. Added -C and -D options to the exinext utility, mainly to make it easier
6475 to include in the automated testing, but these could be helpful when
6476 multiple configurations are in use.
6478 2. The exinext utility was not formatting the output nicely when there was
6479 an alternate port involved in the retry record key, nor when there was a
6480 message id as well (for retries that were specific to a specific message
6481 and a specific host). It was also confused by IPv6 addresses, because of
6482 the additional colons they contain. I have fixed the IPv4 problem, and
6483 patched it up to do a reasonable job for IPv6.
6485 3. When there is an error after a MAIL, RCPT, or DATA SMTP command during
6486 delivery, the log line now contains "pipelined" if PIPELINING was used.
6488 4. An SMTP transport process used to panic and die if the bind() call to set
6489 an explicit outgoing interface failed. This has been changed; it is now
6490 treated in the same way as a connect() failure.
6492 5. A reference to $sender_host_name in the part of a conditional expansion
6493 that was being skipped was still causing a DNS lookup. This no longer
6496 6. The def: expansion condition was not recognizing references to header lines
6497 that used bh_ and bheader_.
6499 7. Added the _cache feature to named lists.
6501 8. The code for checking quota_filecount in the appendfile transport was
6502 allowing one more file than it should have been.
6504 9. For compatibility with Sendmail, the command line option
6512 and sets the incoming protocol and host name (for trusted callers). The
6513 host name and its colon can be omitted when only the protocol is to be set.
6514 Note the Exim already has two private options, -pd and -ps, that refer to
6515 embedded Perl. It is therefore impossible to set a protocol value of "d" or
6516 "s", but I don't think that's a major issue.
6518 10. A number of refactoring changes to the code, none of which should affect
6521 (a) The number of logging options was getting close to filling up the
6522 32-bit word that was used as a bit map. I have split them into two classes:
6523 those that are passed in the argument to log_write(), and those that are
6524 only ever tested independently outside of that function. These are now in
6525 separate 32-bit words, so there is plenty of room for expansion again.
6526 There is no change in the user interface or the logging behaviour.
6528 (b) When building, for example, log lines, the code previously used a
6529 macro that called string_cat() twice, in order to add two strings. This is
6530 not really sufficiently general. Furthermore, there was one instance where
6531 it was actually wrong because one of the argument was used twice, and in
6532 one call a function was used. (As it happened, calling the function twice
6533 did not affect the overall behaviour.) The macro has been replaced by a
6534 function that can join an arbitrary number of extra strings onto a growing
6537 (c) The code for expansion conditions now uses a table and a binary chop
6538 instead of a serial search (which was left over from when there were very
6539 few conditions). Also, it now recognizes conditions like "pam" even when
6540 the relevant support is not compiled in: a suitably worded error message is
6541 given if an attempt is made to use such a condition.
6543 11. Added ${time_interval:xxxxx}.
6545 12. A bug was causing one of the ddress fields not to be passed back correctly
6546 from remote delivery subprocesses. The field in question was not being
6547 subsequently used, so this caused to problems in practice.
6549 13. Added new log selectors queue_time and deliver_time.
6551 14. Might have fixed a bug in maildirsizefile handling that threw up
6552 "unexpected character" debug warnings, and recalculated the data
6553 unnecessarily. In any case, I expanded the warning message to give more
6556 15. Added the message "Restricted characters in address" to the statements in
6557 the default ACL that block characters like @ and % in local parts.
6559 16. Change 71 for release 4.31 proved to be much less benign that I imagined.
6560 Three changes have been made:
6562 (a) There was a serious bug; a negative response to MAIL caused the whole
6563 recipient domain to be cached as invalid, thereby blocking all messages
6564 to all local parts at the same domain, from all senders. This bug has
6565 been fixed. The domain is no longer cached after a negative response to
6566 MAIL if the sender used is not empty.
6568 (b) The default behaviour of using MAIL FROM:<> for recipient callouts has
6571 (c) A new callout option, "use_sender" has been added for people who want
6572 the modified behaviour.
6578 1. Removed "EXTRALIBS=-lwrap" from OS/Makefile-Unixware7 on the advice of
6581 2. Removed "LIBS = -lresolv" from OS/Makefile-Darwin as it is not needed, and
6582 indeed breaks things for older releases.
6584 3. Added additional logging to the case where there is a problem reading data
6585 from a filter that is running in a subprocess using a pipe, in order to
6586 try to track down a specific problem.
6588 4. Testing facility fudge: when running in the test harness and attempting
6589 to connect to 10.x.x.x (expecting a connection timeout) I'm now sometimes
6590 getting "No route to host". Convert this to a timeout.
6592 5. Define ICONV_ARG2_TYPE as "char **" for Unixware7 to avoid compiler
6595 6. Some OS don't have socklen_t but use size_t instead. This affects the
6596 fifth argument of getsockopt() amongst other things. This is now
6597 configurable by a macro called SOCKLEN_T which defaults to socklen_t, but
6598 can be set for individual OS. I have set it for SunOS5, OSF1, and
6599 Unixware7. Current versions of SunOS5 (aka Solaris) do have socklen_t, but
6600 some earlier ones do not.
6602 7. Change 4.30/15 was not doing the test caselessly.
6604 8. The standard form for an IPv6 address literal was being rejected by address
6605 parsing in, for example, MAIL and RCPT commands. An example of this kind of
6606 address is [IPv6:2002:c1ed:8229:10:202:2dff:fe07:a42a]. Exim now accepts
6607 this, as well as the form without the "IPv6" on the front (but only when
6608 address literals are enabled, of course).
6610 9. Added some casts to avoid compiler warnings in OS/os.c-Linux.
6612 10. Exim crashed if a message with an empty sender address specified by -f
6613 encountered a router with an errors_to setting. This could be provoked only
6614 by a command such as
6618 where an empty string was supplied; "<>" did not hit this bug.
6620 11. Installed PCRE release 4.5.
6622 12. If EHLO/HELO was rejected by an ACL, the value of $sender_helo_name
6623 remained set. It is now erased.
6625 13. exiqgrep wasn't working on MacOS X because it didn't correctly compute
6626 times from message ids (which are base 36 rather than the normal 62).
6628 14. "Expected" SMTP protocol errors that can arise when PIPELINING is in use
6629 were being counted as actual protocol errors, and logged if the log
6630 selector +smtp_protocol_error was set. One cannot be perfect in this test,
6631 but now, if PIPELINING has been advertised, RCPT following a rejected MAIL,
6632 and DATA following a set of rejected RCPTs do not count as protocol errors.
6633 In other words, Exim assumes they were pipelined, though this may not
6634 actually be the case. Of course, in all cases the client gets an
6635 appropriate error code.
6637 15. If a lookup fails in an ACL condition, a message about the failure may
6638 be available; it is used if testing the ACL cannot continue, because most
6639 such messages specify what the cause of the deferral is. However, some
6640 messages (e.g. "MYSQL: no data found") do not cause a defer. There was bug
6641 that caused an old message to be retained and used if a later statement
6642 caused a defer, replacing the real cause of the deferral.
6644 16. If an IP address had so many PTR records that the DNS lookup buffer
6645 was not large enough to hold them, Exim could crash while trying to process
6646 the truncated data. It now detects and logs this case.
6648 17. Further to 4.21/58, another change has been made: if (and only if) the
6649 first line of a message (the first header line) ends with CRLF, a bare LF
6650 in a subsequent header line has a space inserted after it, so as not to
6651 terminate the header.
6653 18. Refactoring: tidied an ugly bit of code in appendfile that copied data
6654 unnecessarily, used atoi() instead of strtol(), and didn't check the
6655 termination when getting file sizes from file names by regex.
6657 19. Completely re-implemented the support for maildirsize files, in the light
6658 of a number of problems with the previous contributed implementation
6659 (4.30/29). In particular:
6661 . If the quota is zero, the maildirsize file is maintained, but no quota is
6664 . If the maildir directory does not exist, it is created before any attempt
6665 to write a maildirsize file.
6667 . The quota value in the file is just a cache; if the quota is changed in
6668 the transport, the new value overrides.
6670 . A regular expression is available for excluding directories from the
6673 20. The autoreply transport checks the characters in options that define the
6674 message's headers; it allows continued headers, but it was checking with
6675 isspace() after an embedded newline instead of explicitly looking for a
6678 21. If all the "regular" hosts to which an address was routed had passed their
6679 expiry times, and had not reached their retry times, the address was
6680 bounced, even if fallback hosts were defined. Now Exim should go on to try
6683 22. Increased buffer sizes in the callout code from 1024 to 4096 to match the
6684 equivalent code in the SMTP transport. Some hosts send humungous responses
6685 to HELO/EHLO, more than 1024 it seems.
6687 23. Refactoring: code in filter.c used (void *) for "any old type" but this
6688 gives compiler warnings in some environments. I've now done it "properly",
6691 24. The replacement for inet_ntoa() that is used with gcc on IRIX systems
6692 (because of problems with the built-in one) was declared to return uschar *
6693 instead of char *, causing compiler failure.
6695 25. Fixed a file descriptor leak when processing alias/forward files.
6697 26. Fixed a minor format string issue in dbfn.c.
6699 27. Typo in exim.c: ("dmbnz" for "dbmnz").
6701 28. If a filter file refered to $h_xxx or $message_headers, and the headers
6702 contained RFC 2047 "words", Exim's memory could, under certain conditions,
6705 29. When a sender address is verified, it is cached, to save repeating the test
6706 when there is more than one recipient in a message. However, when the
6707 verification involves a callout, it is possible for different callout
6708 options to be set for different recipients. It is too complicated to keep
6709 track of this in the cache, so now Exim always runs a verification when a
6710 callout is required, relying on the callout cache for the optimization.
6711 The overhead is duplication of the address routing, but this should not be
6714 30. Fixed a bug in callout caching. If a RCPT command caused the sender address
6715 to be verified with callout=postmaster, and the main callout worked but the
6716 postmaster check failed, the verification correctly failed. However, if a
6717 subsequent RCPT command asked for sender verification *without* the
6718 postmaster check, incorrect caching caused this verification also to fail,
6721 31. Exim caches DNS lookup failures so as to avoid multiple timeouts; however,
6722 it was not caching the DNS options (qualify_single, search_parents) that
6723 were used when the lookup failed. A subsequent lookup with different
6724 options therefore always gave the same answer, though there were cases
6725 where it should not have. (Example: a "domains = !$mx_any" option on a
6726 dnslookup router: the "domains" option is always processed without any
6727 widening, but the router might have qualify_single set.) Now Exim uses the
6728 cached value only when the same options are set.
6730 32. Added John Jetmore's "exipick" utility to the distribution.
6732 33. GnuTLS: When an attempt to start a TLS session fails for any reason other
6733 than a timeout (e.g. a certificate is required, and is not provided), an
6734 Exim server now closes the connection immediately. Previously it waited for
6735 the client to close - but if the client is SSL, it seems that they each
6736 wait for each other, leading to a delay before one of them times out.
6738 34: GnuTLS: Updated the code to use the new GnuTLS 1.0.0 API. I have not
6739 maintained 0.8.x compatibility because I don't think many are using it, and
6740 it is clearly obsolete.
6742 35. Added TLS support for CRLs: a tls_crl global option and one for the smtp
6745 36. OpenSSL: $tls_certificate_verified was being set to 1 even if the
6746 client certificate was expired. A simple patch fixes this, though I don't
6747 understand the full logic of why the verify callback is called multiple
6750 37. OpenSSL: a patch from Robert Roselius: "Enable client-bug workaround.
6751 Versions of OpenSSL as of 0.9.6d include a 'CBC countermeasure' feature,
6752 which causes problems with some clients (such as the Certicom SSL Plus
6753 library used by Eudora). This option, SSL_OP_DONT_INSERT_EMPTY_FRAGMENTS,
6754 disables the coutermeasure allowing Eudora to connect."
6756 38. Exim was not checking that a write() to a log file succeeded. This could
6757 lead to Bad Things if a log got too big, in particular if it hit a file
6758 size limit. Exim now panics and dies if it cannot write to a log file, just
6759 as it does if it cannot open a log file.
6761 39. Modified OS/Makefile-Linux so that it now contains
6763 CFLAGS=-O -D_FILE_OFFSET_BITS=64 -D_LARGEFILE_SOURCE
6765 The two -D definitions ensure that Exim is compiled with large file
6766 support, which makes it possible to handle log files that are bigger than
6769 40. Fixed a subtle caching bug: if (in an ACL or a set of routers, for
6770 instance) a domain was checked against a named list that involved a lookup,
6771 causing $domain_data to be set, then another domain was checked against the
6772 same list, then the first domain was re-checked, the value of $domain_data
6773 after the final check could be wrong. In particular, if the second check
6774 failed, it could be set empty. This bug probably also applied to
6777 41. The strip_trailing_dot option was not being applied to the address given
6778 with the -f command-line option.
6780 42. The code for reading a message's header from the spool was incrementing
6781 $received_count, but never initializing it. This meant that the value was
6782 incorrect (doubled) while delivering a message in the same process in which
6783 it was received. In the most common configuration of Exim, this never
6784 happens - a fresh exec is done - but it can happen when
6785 deliver_drop_privilege is set.
6787 43. When Exim logs an SMTP synchronization error - client data sent too soon -
6788 it now includes up to 150 characters of the unexpected data in the log
6791 44. The exim_dbmbuild utility uses fixed size buffers for reading input lines
6792 and building data strings. The size of both of these buffers was 10 000
6793 bytes - far larger than anybody would *ever* want, thought I. Needless to
6794 say, somebody hit the limit. I have increased the maximum line length to
6795 20 000 and the maximum data length of concatenated lines to 100 000. I have
6796 also fixed two bugs, because there was no checking on these buffers. Tsk,
6797 tsk. Now exim_dbmbuild gives a message and exits with an error code if a
6798 buffer is too small.
6800 45. The exim_dbmbuild utility did not support quoted keys, as Exim does in
6801 lsearch lookups. Now it does.
6803 46. When parsing a route_list item in a manualroute router, a fixed-length
6804 buffer was used for the list of hosts. I made this 1024 bytes long,
6805 thinking that nobody would ever have a list of hosts that long. Wrong.
6806 Somebody had a whole pile of complicated expansion conditions, and the
6807 string was silently truncated, leading to an expansion error. It turns out
6808 that it is easier to change to an unlimited length (owing to other changes
6809 that have happened since this code was originally written) than to build
6810 structure for giving a limitation error. The length of the item that
6811 expands into the list of hosts is now unlimited.
6813 47. The lsearch lookup could not handle data where the length of text line was
6814 more than 4095 characters. Such lines were truncated, leading to shortened
6815 data being returned. It should now handle lines of any length.
6817 48. Minor wording revision: "cannot test xxx in yyy ACL" becomes "cannot test
6818 xxx condition in yyy ACL" (e.g. "cannot test domains condition in DATA
6821 49. Cosmetic tidy to scripts like exicyclog that are generated by globally
6822 replacing strings such as BIN_DIRECTORY in a source file: the replacement
6823 no longer happens in comment lines. A list of replacements is now placed
6824 at the head of all of the source files, except those whose only change is
6825 to replace PERL_COMMAND in the very first #! line.
6827 50. Replaced the slow insertion sort in queue.c, for sorting the list of
6828 messages on the queue, with a bottom-up merge sort, using code contributed
6829 by Michael Haardt. This should make operations like -bp somewhat faster on
6830 large queues. It won't affect queue runners, except when queue_run_in_order
6833 51. Installed eximstats 1.31 in the distribution.
6835 52. Added support for SRV lookups to the dnslookup router.
6837 53. If an ACL referred to $message_body or $message_body_end, the value was not
6838 reset for any messages that followed in the same SMTP session.
6840 54. The store-handling optimization for building very long strings was not
6841 differentiating between the different store pools. I don't think this
6842 actually made any difference in practice, but I've tidied it.
6844 55. While running the routers to verify a sender address, $sender_address
6845 was still set to the sender address. This is wrong, because when routing to
6846 send a bounce to the sender, it would be empty. Therefore, I have changed
6847 it so that, while verifying a sender address, $sender_address is set to <>.
6848 (There is no change to what happens when verifying a recipient address.)
6850 56. After finding MX (or SRV) records, Exim was doing a DNS lookup for the
6851 target A or AAAA records (if not already returned) without resetting the
6852 qualify_single or search_parents options of the DNS resolver. These are
6853 inappropriate in this case because the targets of MX and SRV records must
6854 be FQDNs. A broken DNS record could cause trouble if it happened to have a
6855 target that, when qualified, matched something in the local domain. These
6856 two options are now turned off when doing these lookups.
6858 57. It seems that at least some releases of Reiserfs (which does not have the
6859 concept of a fixed number of inodes) returns zero and not -1 for the
6860 number of available inodes. This interacted badly with check_spool_inodes,
6861 which assumed that -1 was the "no such thing" setting. What I have done is
6862 to check that the total number of inodes is greater than zero before doing
6863 the test of how many are available.
6865 58. When a "warn" ACL statement has a log_message modifier, the message is
6866 remembered, and not repeated. This is to avoid a lot of repetition when a
6867 message has many recipients that cause the same warning to be written.
6868 However, Exim was preserving the list of already written lines for an
6869 entire SMTP session, which doesn't seem right. The memory is now reset if a
6870 new message is started.
6872 59. The "rewrite" debugging flag was not showing the result of rewriting in the
6873 debugging output unless log_rewrite was also set.
6875 60. Avoid a compiler warning on 64-bit systems in dsearch.c by avoiding the use
6876 of (int)(handle) when we know that handle contains (void *)(-1).
6878 61. The Exim daemon panic-logs an error return when it closes the incoming
6879 connection. However "connection reset by peer" seems to be common, and
6880 isn't really an error worthy of noting specially, so that particular error
6883 62. When Exim is trying to find all the local interfaces, it used to panic and
6884 die if the ioctl to get the interface flags failed. However, it seems that
6885 on at least one OS (Solaris 9) it is possible to have an interface that is
6886 included in the list of interfaces, but for which you get a failure error
6887 for this call. This happens when the interface is not "plumbed" into a
6888 protocol (i.e. neither IPv4 nor IPv6). I've changed the code so that a
6889 failure of the "get flags" call assumes that the interface is down.
6891 63. Added a ${eval10: operator, which assumes all numbers are decimal. This
6892 makes life easier for people who are doing arithmetic on fields extracted
6893 from dates, where you often get leading zeros that should not be
6894 interpreted as octal.
6896 64. Added qualify_domain to the redirect router, to override the global
6899 65. If a pathologically long header line contained very many addresses (the
6900 report of this problem mentioned 10 000) and each of them was rewritten,
6901 Exim could use up a very large amount of memory. (It kept on making new
6902 copies of the header line as it rewrote, and never released the old ones.)
6903 At the expense of a bit more processing, the header rewriting function has
6904 been changed so that it no longer eats memory in this way.
6906 66. The generation of the Received: header has been moved from the time that a
6907 message starts to be received, to the time that it finishes. The timestamp
6908 in the Received: header should now be very close to that of the <= log
6909 line. There are two side-effects of this change:
6911 (a) If a message is rejected by a DATA or non-SMTP ACL or local_scan(), the
6912 logged header lines no longer include the local Received: line, because
6913 it has not yet been created. The same applies to a copy of the message
6914 that is returned to a non-SMTP sender when a message is rejected.
6916 (b) When a filter file is tested using -bf, no additional Received: header
6917 is added to the test message. After some thought, I decided that this
6920 This change does not affect the value of $received_for. It is still set
6921 after address rewriting, but before local_scan() is called.
6923 67. Installed the latest Cygwin-specific files from the Cygwin maintainer.
6925 68. GnuTLS: If an empty file is specified for tls_verify_certificates, GnuTLS
6926 gave an unhelpful panic error message, and a defer error. I have managed to
6927 change this behaviour so that it now rejects any supplied certificate,
6928 which seems right, as the list of acceptable certificates is empty.
6930 69. OpenSSL: If an empty file is specified for tls_verify_certificates, OpenSSL
6931 gave an unhelpful defer error. I have not managed to make this reject any
6932 supplied certificates, but the error message it gives is "no certificate
6933 supplied", which is not helpful.
6935 70. exigrep's output now also includes lines that are not associated with any
6936 message, but which match the given pattern. Implemented by a patch from
6937 Martin Sluka, which also tidied up the Perl a bit.
6939 71. Recipient callout verification, like sender verification, was using <> in
6940 the MAIL FROM command. This isn't really the right thing, since the actual
6941 sender may affect whether the remote host accepts the recipient or not. I
6942 have changed it to use the actual sender in the callout; this means that
6943 the cache record is now keyed on a recipient/sender pair, not just the
6944 recipient address. There doesn't seem to be a real danger of callout loops,
6945 since a callout by the remote host to check the sender would use <>.
6946 [SEE ABOVE: changed after hitting problems.]
6948 72. Exim treats illegal SMTP error codes that do not begin with 4 or 5 as
6949 temporary errors. However, in the case of such a code being given after
6950 the end of a data transmission (i.e. after ".") Exim was failing to write
6951 a retry record for the message. (Yes, there was some broken host that was
6952 actually sending 8xx at this point.)
6954 73. An unknown lookup type in a host list could cause Exim to panic-die when
6955 the list was checked. (An example that provoked this was putting <; in the
6956 middle of a list instead of at the start.) If this happened during a DATA
6957 ACL check, a -D file could be left lying around. This kind of configuration
6958 error no longer causes Exim to die; instead it causes a defer error. The
6959 incident is still logged to the main and panic logs.
6961 74. Buglet left over from Exim 3 conversion. The message "too many messages
6962 in one connection" was written to the rejectlog but not the mainlog, except
6963 when address rewriting (yes!) was being logged.
6965 75. Added write_rejectlog option.
6967 76. When a system filter was run not as root (that is, when system_filter_user
6968 was set), the values of the $n variables were not being returned to the
6969 main process; thus, they were not subsequently available in the $sn
6972 77. Added +return_path_on_delivery log selector.
6974 78. A connection timeout was being treated differently from recipients deferred
6975 when testing hosts_max_try with a message that was older than the host's
6976 retry timeout. (The host should not be counted, thus allowing all hosts to
6977 be tried at least once before bouncing.) This may have been the cause of an
6978 occasionally reported bug whereby a message would remain on the queue
6979 longer than the retry timeout, but would be bounced if a delivery was
6980 forced. I say "may" because I never totally pinned down the problem;
6981 setting up timeout/retry tests is difficult. See also the next item.
6983 79. The ultimate address timeout was not being applied to errors that involved
6984 a combination of host plus message (for example, a timeout on a MAIL
6985 command). When an address resolved to a number of possible hosts, and they
6986 were not all tried for each delivery (e.g. because of hosts_max_try), a
6987 message could remain on the queue longer than the retry timeout.
6989 80. Sieve bug: "stop" inside "elsif" was broken. Applied a patch from Michael
6992 81. Fixed an obscure SMTP outgoing bug which required at least the following
6993 conditions: (a) there was another message waiting for the same server;
6994 (b) the server returned 5xx to all RCPT commands in the first message so
6995 that the message was not completed; (c) the server dropped the connection
6996 or gave a negative response to the RSET that Exim sends to abort the
6997 transaction. The observed case was a dropped connection after DATA that had
6998 been sent in pipelining mode. That is, the server had advertised PIPELINING
6999 but was not implementing it correctly. The effect of the bug was incorrect
7000 behaviour, such as trying another host, and this could lead to a crash.
7006 1. The 3rd arguments to getsockname(), getpeername(), and accept() in exim.c
7007 and daemon.c were passed as pointers to ints; they should have been
7008 pointers to socklen_t variables (which are typically unsigned ints).
7010 2. Some signed/unsigned type warnings in the os.c file for Linux have been
7013 3. Fixed a really odd bug that affected only the testing scheme; patching a
7014 certain fixed string in the binary changed the value of another string that
7015 happened to be identical to the end of the original first string.
7017 4. When gethostbyname() (or equivalent) is passed an IP address as a "host
7018 name", it returns that address as the IP address. On some operating
7019 systems (e.g. Solaris), it also passes back the IP address string as the
7020 "host name". However, on others (e.g. Linux), it passes back an empty
7021 string. Exim wasn't checking for this, and was changing the host name to an
7022 empty string, assuming it had been canonicalized.
7024 5. Although rare, it is permitted to have more than one PTR record for a given
7025 IP address. I thought that gethostbyaddr() or getipnodebyaddr() always gave
7026 all the names associated with an address, because they do in Solaris.
7027 However, it seems that they do not in Linux for data that comes from the
7028 DNS. If an address in /etc/hosts has multiple names, they _are_ all given.
7029 I found this out when I moved to a new Linux workstation and tried to run
7030 the Exim test suite.
7032 To get round this problem I have changed the code so that it now does its
7033 own call to the DNS to look up PTR records when searching for a host name.
7034 If nothing can be found in the DNS, it tries gethostbyaddr(), so that
7035 addresses that are only in /etc/hosts are still found.
7037 This behaviour is, however, controlled by an option called host_lookup_
7038 order, which defaults to "bydns:byaddr". If people want to use the other
7039 order, or indeed, just use one or the other means of lookup, they can
7040 specify it in this variable.
7042 6. If a PTR record yields an empty name, Exim treats it as non-existent. In
7043 some operating systems, this comes back from gethostbyaddr() as an empty
7044 string, and this is what Exim used to test for. However, it seems that in
7045 other systems, "." is yielded. Exim now tests for this case too.
7047 7. The values of check_spool_space and check_log_space are now held internally
7048 as a number of kilobytes instead of an absolute number of bytes. If a
7049 numbers is specified without 'K' or 'M', it is rounded up to the nearest
7050 kilobyte. This means that much larger values can be stored.
7052 8. Exim monitor: an attempt to get the action menu when not actually pointing
7053 at a message produces an empty menu entitled "No message selected". This
7054 works on Solaris (OpenWindows). However, XFree86 does not like a menu with
7055 no entries in it ("Shell widget menu has zero width and/or height"). So I
7056 have added a single, blank menu entry in this case.
7058 9. Added ${quote_local_part.
7060 10. MIME decoding is now applied to the contents of Subject: header lines when
7063 11. Now that a reference to $sender_host_address automatically causes a reverse
7064 lookup to occur if necessary (4.13/18), there is no need to arrange for a
7065 host lookup before query-style lookups in lists that might use this
7066 variable. This has therefore been abolished, and the "net-" prefix is no
7067 longer necessary for query-style lookups.
7069 12. The Makefile for SCO_SV contained a setting of LDFLAGS. This appears to
7070 have been a typo for LFLAGS, so it has been changed.
7072 13. The install script calls Exim with "-C /dev/null" in order to find the
7073 version number. If ALT_CONFIG_PREFIX was set, this caused an error message
7074 to be output. However, since Exim outputs its version number before the
7075 error, it didn't break the script. It just looked ugly. I fixed this by
7076 always allowing "-C /dev/null" if the caller is root.
7078 14. Ignore overlarge ACL variable number when reading spool file - insurance
7079 against a later release with more variables having written the file.
7081 15. The standard form for an IPv6 address literal was being rejected by EHLO.
7082 Example: [IPv6:2002:c1ed:8229:10:202:2dff:fe07:a42a]. Exim now accepts
7083 this, as well as the form without the "IPv6" on the front.
7085 16. Added CHOWN_COMMAND=/usr/sbin/chown and LIBS=-lresolv to the
7086 OS/Makefile-Darwin file.
7088 17. Fixed typo in lookups/ldap.c: D_LOOKUP should be D_lookup. This applied
7089 only to LDAP libraries that do not have LDAP_OPT_DEREF.
7091 18. After change 4.21/52, "%ld" was used to format the contents of the $inode
7092 variable. However, some OS use ints for inodes. I've added cast to long int
7093 to get rid of the compiler warning.
7095 19. I had forgotten to lock out "/../" in configuration file names when
7096 ALT_CONFIG_PREFIX was set.
7098 20. Routers used for verification do not need to specify transports. However,
7099 if such a router generated a host list, and callout was configured, Exim
7100 crashed, because it could not find a port number from the (non-existent)
7101 transport. It now assumes port 25 in this circumstance.
7103 21. Added the -t option to exigrep.
7105 22. If LOOKUP_LSEARCH is defined, all three linear search methods (lsearch,
7106 wildlsearch, nwildlsearch) are compiled. LOOKUP_WILDLSEARCH and LOOKUP_
7107 NWILDLSEARCH are now obsolete, but retained for compatibility. If either of
7108 them is set, LOOKUP_LSEARCH is forced.
7110 23. "exim -bV" now outputs a list of lookups that are included in the binary.
7112 24. Added sender and host information to the "rejected by local_scan()" log
7113 line; previously there was no indication of these.
7115 25. Added .include_if_exists.
7117 26. Change 3.952/11 added an explicit directory sync on top of a file sync for
7118 Linux. It turns out that not all file systems support this. Apparently some
7119 versions of NFS do not. (It's rare to put Exim's spool on NFS, but people
7120 do it.) To cope with this, the error EINVAL, which means that sync-ing is
7121 not supported on the file descriptor, is now ignored when Exim is trying to
7122 sync a directory. This applies only to Linux.
7124 27. Added -DBIND_8_COMPAT to the CLFAGS setting for Darwin.
7126 28. In Darwin (MacOS X), the PAM headers are in /usr/include/pam and not in
7127 /usr/include/security. There's now a flag in OS/os.h-Darwin to cope with
7130 29. Added support for maildirsize files from supplied patch (modified a bit).
7132 30. The use of :fail: followed by an empty string could lead Exim to respond to
7133 sender verification failures with (e.g.):
7135 550 Verification failed for <xxx>
7136 550 Sender verify failed
7138 where the first response line was missing the '-' that indicates it is not
7139 the final line of the response.
7141 31. The loop for finding the name of the user that called Exim had a hardwired
7142 limit of 10; it now uses the value of finduser_retries, which is used for
7143 all other user lookups.
7145 32. Added $received_count variable, available in data and not_smtp ACLs, and at
7148 33. Exim was neglecting to zero errno before one call of strtol() when
7149 expanding a string and expecting an integer value. On some systems this
7150 resulted in spurious "integer overflow" errors. Also, it was casting the
7151 result into an int without checking.
7153 34. Testing for a connection timeout using "timeout_connect" in the retry rules
7154 did not work. The code looks as if it has *never* worked, though it appears
7155 to have been documented since at least release 1.62. I have made it work.
7157 35. The "timeout_DNS" error in retry rules, also documented since at least
7158 1.62, also never worked. As it isn't clear exactly what this means, and
7159 clearly it isn't a major issue, I have abolished the feature by treating it
7160 as "timeout", and writing a warning to the main and panic logs.
7162 36. The display of retry rules for -brt wasn't always showing the error code
7165 37. Added new error conditions to retry rules: timeout_A, timeout_MX,
7166 timeout_connect_A, timeout_connect_MX.
7168 38. Rewriting the envelope sender at SMTP time did not allow it to be rewritten
7169 to the empty sender.
7171 39. The daemon was not analysing the content of -oX till after it had closed
7172 stderr and disconnected from the controlling terminal. This meant that any
7173 syntax errors were only noted on the panic log, and the return code from
7174 the command was 0. By re-arranging the code a little, I've made the
7175 decoding happen first, so such errors now appear on stderr, and the return
7176 code is 1. However, the actual setting up of the sockets still happens in
7177 the disconnected process, so errors there are still only recorded on the
7180 40. A daemon listener on a wildcard IPv6 socket that also accepts IPv4
7181 connections (as happens on some IP stacks) was logged at start up time as
7182 just listening for IPv6. It now logs "IPv6 with IPv4". This differentiates
7183 it from "IPv6 and IPv4", which means that two separate sockets are being
7186 41. The debug output for gethostbyname2() or getipnodebyname() failures now
7187 says whether AF_INET or AF_INET6 was passed as an argument.
7189 42. Exiwhat output was messed up when time zones were included in log
7192 43. Exiwhat now gives more information about the daemon's listening ports,
7193 and whether -tls-on-connect was used.
7195 44. The "port" option of the smtp transport is now expanded.
7197 45. A "message" modifier in a "warn" statement in a non-message ACL was being
7198 silently ignored. Now an error message is written to the main and panic
7201 46. There's a new ACL modifier called "logwrite" which writes to a log file
7202 as soon as it is encountered.
7204 47. Added $local_user_uid and $local_user_gid at routing time.
7206 48. Exim crashed when trying to verify a sender address that was being
7209 49. Exim was recognizing only a space character after ".include". It now also
7210 recognizes a tab character.
7212 50. Fixed several bugs in the Perl script that creates the exim.8 man page by
7213 extracting the relevant information from the specification. The man page no
7214 longer contains scrambled data for the -d option, and I've added a section
7215 at the front about calling Exim under different names.
7217 51. Added "extra_headers" argument to the "mail" command in filter files.
7219 52. Redirecting mail to an unqualified address in a Sieve filter caused Exim to
7222 53. Installed eximstats 1.29.
7224 54. Added transport_filter_timeout as a generic transport option.
7226 55. Exim no longer adds an empty Bcc: header to messages that have no To: or
7227 Cc: header lines. This was required by RFC 822, but it not required by RFC
7230 56. Exim used to add From:, Date:, and Message-Id: header lines to any
7231 incoming messages that did not have them. Now it does so only if the
7232 message originates locally, that is, if there is no associated remote host
7233 address. When Resent- header lines are present, this applies to the Resent-
7234 lines rather than the non-Resent- lines.
7236 57. Drop incoming SMTP connection after too many syntax or protocol errors. The
7237 limit is controlled by smtp_max_synprot_errors, defaulting to 3.
7239 58. Messages for configuration errors now include the name of the main
7240 configuration file - useful now that there may be more than one file in a
7241 list (.included file names were always shown).
7243 59. Change 4.21/82 (run initgroups() when starting the daemon) causes problems
7244 for those rare installations that do not start the daemon as root or run it
7245 setuid root. I've cut out the call to initgroups() if the daemon is not
7248 60. The Exim user and group can now be bound into the binary as text strings
7249 that are looked up at the start of Exim's processing.
7251 61. Applied a small patch for the Interbase code, supplied by Ard Biesheuvel.
7253 62. Added $mailstore_basename variable.
7255 63. Installed patch to sieve.c from Michael Haardt.
7257 64. When Exim failed to open the panic log after failing to open the main log,
7258 the original message it was trying to log was written to stderr and debug
7259 output, but if they were not available (the usual case in production), it
7260 was lost. Now it is written to syslog before the two lines that record the
7261 failures to open the logs.
7263 65. Users' Exim filters run in subprocesses under the user's uid. It is
7264 possible for a "deliver" command or an alias in a "personal" command to
7265 provoke an address rewrite. If logging of address rewriting is configured,
7266 this fails because the process is not running as root or exim. There may be
7267 a better way of dealing with this, but for the moment (because 4.30 needs
7268 to be released), I have disabled address rewrite logging when running a
7269 filter in a non-root, non-exim process.
7275 1. The buildconfig auxiliary program wasn't quoting the value set for
7276 HEADERS_CHARSET. This caused a compilation error complaining that 'ISO' was
7277 not defined. This bug was masked in 4.22 by the effect that was fixed in
7280 2. Some messages that were rejected after a message id was allocated were
7281 shown as "incomplete" by exigrep. It no longer does this for messages that
7282 are rejected by local_scan() or the DATA or non-SMTP ACLs.
7284 3. If a Message-ID: header used a domain literal in the ID, and Exim did not
7285 have allow_domain_literals set, the ID did not get logged in the <= line.
7286 Domain literals are now always recognized in Message-ID: header lines.
7288 4. The first argument for a ${extract expansion item is the key name or field
7289 number. Leading and trailing spaces in this item were not being ignored,
7290 causing some misleading effects.
7292 5. When deliver_drop_privilege was set, single queue runner processes started
7293 manually (i.e. by the command "exim -q") or by the daemon (which uses the
7294 same command in the process it spins off) were not dropping privilege.
7296 6. When the daemon running as "exim" started a queue runner, it always
7297 re-executed Exim in the spun-off process. This is a waste of effort when
7298 deliver_drop_privilege is set. The new process now just calls the
7299 queue-runner function directly.
7305 1. Typo in the src/EDITME file: it referred to HEADERS_DECODE_TO instead of
7308 2. Change 4.21/73 introduced a bug. The pid file path set by -oP was being
7309 ignored. Though the use of -oP was forcing the writing of a pid file, it
7310 was always written to the default place.
7312 3. If the message "no IP address found for host xxxx" is generated during
7313 incoming verification, it is now followed by identification of the incoming
7314 connection (so you can more easily find what provoked it).
7316 4. Bug fix for Sieve filters: "stop" inside a block was not working properly.
7318 5. Added some features to "harden" Exim a bit more against certain attacks:
7320 (a) There is now a build-time option called FIXED_NEVER_USERS that can
7321 be put in Local/Makefile. This is like the never_users runtime option,
7322 but it cannot be overridden. The default setting is "root".
7324 (b) If ALT_CONFIG_PREFIX is defined in Local/Makefile, it specifies a
7325 prefix string with which any file named in a -C command line option
7328 (c) If ALT_CONFIG_ROOT_ONLY is defined in Local/Makefile, root privilege
7329 is retained for -C and -D only if the caller of Exim is root. Without
7330 it, the exim user may also use -C and -D and retain privilege.
7332 (d) If DISABLE_D_OPTION is defined in Local/Makefile, the use of the -D
7333 command line option is disabled.
7335 6. Macro names set by the -D option must start with an upper case letter, just
7336 like macro names defined in the configuration file.
7338 7. Added "dereference=" facility to LDAP.
7340 8. Two instances of the typo "uknown" in the source files are fixed.
7342 9. If a PERL_COMMAND setting in Local/Makefile was not at the start of a line,
7343 the Configure-Makefile script screwed up while processing it.
7345 10. Incorporated PCRE 4.4.
7347 11. The SMTP synchronization check was not operating right at the start of an
7348 SMTP session. For example, it could not catch a HELO sent before the client
7349 waited for the greeting. There is now a check for outstanding input at the
7350 point when the greeting is written. Because of the duplex, asynchronous
7351 nature of TCP/IP, it cannot be perfect - the incorrect input may be on its
7352 way, but not yet received, when the check is performed.
7354 12. Added tcp_nodelay to make it possible to turn of the setting of TCP_NODELAY
7355 on TCP/IP sockets, because this apparently causes some broken clients to
7358 13. Installed revised OS/Makefile-CYGWIN and OS/os.c-cygwin (the .h file was
7359 unchanged) from the Cygwin maintainer.
7361 14. The code for -bV that shows what is in the binary showed "mbx" when maildir
7362 was supported instead of testing for mbx. Effectively a typo.
7364 15. The spa authenticator server code was not checking that the input it
7365 received was valid base64.
7367 16. The debug output line for the "set" modifier in ACLs was not showing the
7368 name of the variable that was being set.
7370 17. Code tidy: the variable type "vtype_string" was never used. Removed it.
7372 18. Previously, a reference to $sender_host_name did not cause a DNS reverse
7373 lookup on its own. Something else was needed to trigger the lookup. For
7374 example, a match in host_lookup or the need for a host name in a host list.
7375 Now, if $sender_host_name is referenced and the host name has not yet been
7376 looked up, a lookup is performed. If the lookup fails, the variable remains
7377 empty, and $host_lookup_failed is set to "1".
7379 19. Added "eqi" as a case-independent comparison operator.
7381 20. The saslauthd authentication condition could segfault if neither service
7382 nor realm was specified.
7384 21. If an overflowing value such as "2048M" was set for message_size_limit, the
7385 error message that was logged was misleading, and incoming SMTP
7386 connections were dropped. The message is now more accurate, and temporary
7387 errors are given to SMTP connections.
7389 22. In some error situations (such as 21 above) Exim rejects all SMTP commands
7390 (except RSET) with a 421 error, until QUIT is received. However, it was
7391 failing to send a response to QUIT.
7393 23. The HELO ACL was being run before the code for helo_try_verify_hosts,
7394 which made it impossible to use "verify = helo" in the HELO ACL. The HELO
7395 ACL is now run after the helo_try_verify_hosts code.
7397 24. "{MD5}" and "{SHA1}" are now recognized as equivalent to "{md5"} and
7398 "{sha1}" in the "crypteq" expansion condition (in fact the comparison is
7399 case-independent, so other case variants are also recognized). Apparently
7400 some systems use these upper case variants.
7402 25. If more than two messages were waiting for the same host, and a transport
7403 filter was specified for the transport, Exim sent two messages over the
7404 same TCP/IP connection, and then failed with "socket operation on non-
7405 socket" when it tried to send the third.
7407 26. Added Exim::debug_write and Exim::log_write for embedded Perl use.
7409 27. The extern definition of crypt16() in expand.c was not being excluded when
7410 the OS had its own crypt16() function.
7412 28. Added bounce_return_body as a new option, and bounce_return_size_limit
7413 as a preferred synonym for return_size_limit, both as an option and as an
7416 29. Added LIBS=-liconv to OS/Makefile-OSF1.
7418 30. Changed the default configuration ACL to relax the local part checking rule
7419 for addresses that are not in any local domains. For these addresses,
7420 slashes and pipe symbols are allowed within local parts, but the sequence
7421 /../ is explicitly forbidden.
7423 31. SPA server authentication was not clearing the challenge buffer before
7426 32. log_message in a "warn" ACL statement was writing to the reject log as
7427 well as to the main log, which contradicts the documentation and doesn't
7428 seem right (because no rejection is happening). So I have stopped it.
7430 33. Added Ard Biesheuvel's lookup code for accessing an Interbase database.
7431 However, I am unable to do any testing of this.
7433 34. Fixed an infelicity in the appendfile transport. When checking directories
7434 for a mailbox, to see if any needed to be created, it was accidentally
7435 using path names with one or more superfluous leading slashes; tracing
7436 would show up entries such as stat("///home/ph10", 0xFFBEEA48).
7438 35. If log_message is set on a "discard" verb in a MAIL or RCPT ACL, its
7439 contents are added to the log line that is written for every discarded
7440 recipient. (Previously a log_message setting was ignored.)
7442 36. The ${quote: operator now quotes the string if it is empty.
7444 37. The install script runs exim in order to find its version number. If for
7445 some reason other than non-existence or emptiness, which it checks, it
7446 could not run './exim', it was installing it with an empty version number,
7447 i.e. as "exim-". This error state is now caught, and the installation is
7450 38. An argument was missing from the function that creates an error message
7451 when Exim fails to connect to the socket for saslauthd authentication.
7452 This could cause Exim to crash, or give a corrupted message.
7454 39. Added isip, isip4, and isip6 to ${if conditions.
7456 40. The ACL variables $acl_xx are now saved with the message, and can be
7457 accessed later in routers, transports, and filters.
7459 41. The new lookup type nwildlsearch is like wildlsearch, except that the key
7460 strings in the file are not string-expanded.
7462 42. If a MAIL command specified a SIZE value that was too large to fit into an
7463 int variable, the check against message_size_limit failed. Such values are
7464 now forced to INT_MAX, which is around 2Gb for a 32-bit variable. Maybe one
7465 day this will have to be increased, but I don't think I want to be around
7466 when emails are that large.
7473 1. Removed HAVE_ICONV=yes from OS/Makefile-FreeBSD, since it seems that
7474 iconv() is not standard in FreeBSD.
7476 2. Change 4.21/17 was buggy and could cause stack overwriting on a system with
7477 IPv6 enabled. The observed symptom was a segmentation fault on return from
7478 the function os_common_find_running_interfaces() in src/os.c.
7480 3. In the check_special_case() function in daemon.c I had used "errno" as an
7481 argument name, which causes warnings on some systems. This was basically a
7482 typo, since it was named "eno" in the comments!
7484 4. The code that waits for the clock to tick (at a resolution of some fraction
7485 of a second) so as to ensure message-id uniqueness was always waiting for
7486 at least one whole tick, when it could have waited for less. [This is
7487 almost certainly not relevant at current processor speeds, where it is
7488 unlikely to ever wait at all. But we try to future-proof.]
7490 5. The function that sleeps for a time interval that includes fractions of a
7491 second contained a race. It did not block SIGALRM between setting the
7492 timer, and suspending (a couple of lines later). If the interval was short
7493 and the sigsuspend() was delayed until after it had expired, the suspension
7494 never ended. On busy systems this could lead to processes getting stuck for
7497 6. Some uncommon configurations may cause a lookup to happen in a queue runner
7498 process, before it forks any delivery processes. The open lookup caching
7499 mechanism meant that the open file or database connection was passed into
7500 the delivery process. The problem was that delivery processes always tidy
7501 up cached lookup data. This could cause a problem for the next delivery
7502 process started by the queue runner, because the external queue runner
7503 process does not know about the closure. So the next delivery process
7504 still has data in the lookup cache. In the case of a file lookup, there was
7505 no problem because closing a file descriptor in a subprocess doesn't affect
7506 the parent. However, if the lookup was caching a connection to a database,
7507 the connection was closed, and the second delivery process was likely to
7508 see errors such as "PGSQL: query failed: server closed the connection
7509 unexpectedly". The problem has been fixed by closing all cached lookups
7510 in a queue runner before running a delivery process.
7512 7. Compiler warning on Linux for the second argument of iconv(), which doesn't
7513 seem to have the "const" qualifier which it has on other OS. I've
7516 8. Change 4.21/2 was too strict. It is only if there are two authenticators
7517 *of the same type* (client or server) with the same public name that an
7518 error should be diagnosed.
7520 9. When Exim looked up a host name for an IP address, but failed to find the
7521 original IP address when looking up the host name (a safety check), it
7522 output the message "<ip address> does not match any IP for NULL", which was
7523 confusing, to say the least. The bug was that the host name should have
7524 appeared instead of "NULL".
7526 10. Since release 3.03, if Exim is called by a uid other than root or the Exim
7527 user that is built into the binary, and the -C or -D options is used, root
7528 privilege is dropped before the configuration file is read. In addition,
7529 logging is switched to stderr instead of the normal log files. If the
7530 configuration then re-defines the Exim user, the unprivileged environment
7531 is probably not what is expected, so Exim logs a panic warning message (but
7534 However, if deliver_drop_privilege is set, the unprivileged state may well
7535 be exactly what is intended, so the warning has been cut out in that case,
7536 and Exim is allowed to try to write to its normal log files.
7542 1. smtp_return_error_details was not giving details for temporary sender
7543 or receiver verification errors.
7545 2. Diagnose a configuration error if two authenticators have the same public
7548 3. Exim used not to create the message log file for a message until the first
7549 delivery attempt. This could be confusing when incoming messages were held
7550 for policy or load reasons. The message log file is now created at the time
7551 the message is received, and an initial "Received" line is written to it.
7553 4. The automatically generated man page for command line options had a minor
7554 bug that caused no ill effects; however, a more serious problem was that
7555 the procedure for building the man page automatically didn't always
7556 operate. Consequently, release 4.20 contains an out-of-date version. This
7557 shouldn't happen again.
7559 5. When building Exim with embedded Perl support, the script that builds the
7560 Makefile was calling 'perl' to find its compile-time parameters, ignoring
7561 any setting of PERL_COMMAND in Local/Makefile. This is now fixed.
7563 6. The freeze_tell option was not being used for messages that were frozen on
7564 arrival, either by an ACL or by local_scan().
7566 7. Added the smtp_incomplete_transaction log selector.
7568 8. After STARTTLS, Exim was not forgetting that it had advertised AUTH, so it
7569 was accepting AUTH without a new EHLO.
7571 9. Added tls_remember_esmtp to cope with YAEB. This allows AUTH and other
7572 ESMTP extensions after STARTTLS without a new EHLO, in contravention of the
7575 10. Logging of TCP/IP connections (when configured) now happens in the main
7576 daemon process instead of the child process, so that the TCP/IP connection
7577 count is more accurate (but it can never be perfect).
7579 11. The use of "drop" in a nested ACL was not being handled correctly in the
7580 outer ACL. Now, if condition failure induced by the nested "drop" causes
7581 the outer ACL verb to deny access ("accept" or "discard" after "endpass",
7582 or "require"), the connection is dropped.
7584 12. Similarly, "discard" in a nested ACL wasn't being handled. A nested ACL
7585 that yield "discard" can now be used with an "accept" or a "discard" verb,
7586 but an error is generated for any others (because I can't see a useful way
7587 to define what should happen).
7589 13. When an ACL is read dynamically from a file (or anywhere else), the lines
7590 are now processed in the same way as lines in the Exim configuration file.
7591 In particular, continuation lines are supported.
7593 14. Added the "dnslists = a.b.c!=n.n.n.n" feature.
7595 15. Added -ti meaning -t -i.
7597 16. Check for letters, digits, hyphens, and dots in the names of dnslist
7598 domains, and warn by logging if others are found.
7600 17. At least on BSD, alignment is not guaranteed for the array of ifreq's
7601 returned from GIFCONF when Exim is trying to find the list of interfaces on
7602 a host. The code in os.c has been modified to copy each ifreq to an aligned
7603 structure in all cases.
7605 Also, in some cases, the returned ifreq's were being copied to a 'struct
7606 ifreq' on the stack, which was subsequently passed to host_ntoa(). That
7607 means the last couple of bytes of an IPv6 address could be chopped if the
7608 ifreq contained only a normal sockaddr (14 bytes storage).
7610 18. Named domain lists were not supported in the hosts_treat_as_local option.
7611 An entry such as +xxxx was not recognized, and was treated as a literal
7614 19. Ensure that header lines added by a DATA ACL are included in the reject log
7615 if the ACL subsequently rejects the message.
7617 20. Upgrade the cramtest.pl utility script to use Digest::MD5 instead of just
7618 MD5 (which is deprecated).
7620 21. When testing a filter file using -bf, Exim was writing a message when it
7621 took the sender from a "From " line in the message, but it was not doing so
7622 when it took $return_path from a Return-Path: header line. It now does.
7624 22. If the contents of a "message" modifier for a "warn" ACL verb do not begin
7625 with a valid header line field name (a series of printing characters
7626 terminated by a colon, Exim now inserts X-ACL-Warn: at the beginning.
7628 23. Changed "disc" in the source to "disk" to conform to the documentation and
7629 the book and for uniformity.
7631 24. Ignore Sendmail's -Ooption=value command line item.
7633 25. When execve() failed while trying to run a command in a pipe transport,
7634 Exim was returning EX_UNAVAILABLE (69) from the subprocess. However, this
7635 could be confused with a return value of 69 from the command itself. This
7636 has been changed to 127, the value the shell returns if it is asked to run
7637 a non-existent command. The wording for the related log line suggests a
7638 non-existent command as the problem.
7640 26. If received_header_text expands to an empty string, do not add a Received:
7641 header line to the message. (Well, it adds a token one on the spool, but
7642 marks it "old" so that it doesn't get used or transmitted.)
7644 27. Installed eximstats 1.28 (addition of -nt option).
7646 28. There was no check for failure on the call to getsockname() in the daemon
7647 code. This can fail if there is a shortage of resources on the system, with
7648 ENOMEM, for example. A temporary error is now given on failure.
7650 29. Contrary to the C standard, it seems that in some environments, the
7651 equivalent of setlocale(LC_ALL, "C") is not obeyed at the start of a C
7652 program. Exim now does this explicitly; it affects the formatting of
7653 timestamps using strftime().
7655 30. If exiqsumm was given junk data, it threw up some uninitialized variable
7656 complaints. I've now initialized all the variables, to avoid this.
7658 32. Header lines added by a system filter were not being "seen" during
7659 transport-time rewrites.
7661 33. The info_callback() function passed to OpenSSL is set up with type void
7662 (*)(SSL *, int, int), as described somewhere. However, when calling the
7663 function (actually a macro) that sets it up, the type void(*)() is
7664 expected. I've put in a cast to prevent warnings from picky compilers.
7666 34. If a DNS black list lookup found a CNAME record, but there were no A
7667 records associated with the domain it pointed at, Exim crashed.
7669 35. If a DNS black list lookup returned more than one A record, Exim ignored
7670 all but the first. It now scans all returned addresses if a particular IP
7671 value is being sought. In this situation, the contents of the
7672 $dnslist_value variable are a list of all the addresses, separated by a
7675 36. Tightened up the rules for host name lookups using reverse DNS. Exim used
7676 to accept a host name and all its aliases if the forward lookup for any of
7677 them yielded the IP address of the incoming connection. Now it accepts only
7678 those names whose forward lookup yields the correct IP address. Any other
7679 names are discarded. This closes a loophole whereby a rogue DNS
7680 administrator could create reverse DNS records to break through a
7681 wildcarded host restriction in an ACL.
7683 37. If a user filter or a system filter that ran in a subprocess used any of
7684 the numerical variables ($1, $2 etc), or $thisaddress, in a pipe command,
7685 the wrong values were passed to the pipe command ($thisaddress had the
7686 value of $0, $0 had the value of $1, etc). This bug was introduced by
7687 change 4.11/101, and not discovered because I wrote an inadequate test. :-(
7689 38. Improved the line breaking for long SMTP error messages from ACLs.
7690 Previously, if there was no break point between 40 and 75 characters, Exim
7691 left the rest of the message alone. Two changes have been made: (a) I've
7692 reduced the minimum length to 35 characters; (b) if it can't find a break
7693 point between 35 and 75 characters, it looks ahead and uses the first one
7694 that it finds. This may give the occasional overlong line, but at least the
7695 remaining text gets split now.
7697 39. Change 82 of 4.11 was unimaginative. It assumed the limit on the number of
7698 file descriptors might be low, and that setting 1000 would always raise it.
7699 It turns out that in some environments, the limit is already over 1000 and
7700 that lowering it causes trouble. So now Exim takes care not to decrease it.
7702 40. When delivering a message, the value of $return_path is set to $sender_
7703 address at the start of routing (routers may change the value). By an
7704 oversight, this default was not being set up when an address was tested by
7705 -bt or -bv, which affected the outcome if any router or filter referred to
7708 41. The idea of the "warn" ACL verb is that it adds a header or writes to the
7709 log only when "message" or "log_message" are set. However, if one of the
7710 conditions was an address verification, or a call to a nested ACL, the
7711 messages generated by the underlying test were being passed through. This
7712 no longer happens. The underlying message is available in $acl_verify_
7713 message for both "message" and "log_message" expansions, so it can be
7714 passed through if needed.
7716 42. Added RFC 2047 interpretation of header lines for $h_ expansions, with a
7717 new expansion $bh_ to give the encoded byte string without charset
7718 translation. Translation happens only if iconv() is available; HAVE_ICONV
7719 indicates this at build time. HEADERS_CHARSET gives the charset to
7720 translate to; headers_charset can change it in the configuration, and
7721 "headers charset" can change it in an individual filter file.
7723 43. Now that we have a default RFC 2047 charset (see above), the code in Exim
7724 that creates RFC 2047 encoded "words" labels them as that charset instead
7725 of always using iso-8859-1. The cases are (i) the explicit ${rfc2047:
7726 expansion operator; (ii) when Exim creates a From: line for a local
7727 message; (iii) when a header line is rewritten to include a "phrase" part.
7729 44. Nasty bug in exiqsumm: the regex to skip already-delivered addresses was
7730 buggy, causing it to skip the first lines of messages whose message ID
7731 ended in 'D'. This would not have bitten before Exim release 4.14, because
7732 message IDs were unlikely to end in 'D' before then. The effect was to have
7733 incorrect size information for certain domains.
7735 45. #include "config.h" was missing at the start of the crypt16.c module. This
7736 caused trouble on Tru64 (aka OSF1) systems, because HAVE_CRYPT16 was not
7739 46. If there was a timeout during a "random" callout check, Exim treated it as
7740 a failure of the random address, and carried on sending RSET and the real
7741 address. If the delay was just some slowness somewhere, the response to the
7742 original RCPT would be taken as a response to RSET and so on, causing
7743 mayhem of various kinds.
7745 47. Change 50 for 4.20 was a heap of junk. I don't know what I was thinking
7746 when I implemented it. It didn't allow for the fact that some option values
7747 may legitimately be negative (e.g. size_addition), and it didn't even do
7748 the right test for positive values.
7750 48. Domain names in DNS records are case-independent. Exim always looks them up
7751 in lower case. Some resolvers return domain names in exactly the case they
7752 appear in the zone file, that is, they may contain uppercase letters. Not
7753 all resolvers do this - some return always lower case. Exim was treating a
7754 change of case by a resolver as a change of domain, similar to a widening
7755 of a domain abbreviation. This triggered its re-routing code and so it was
7756 trying to route what was effectively the same domain again. This normally
7757 caused routing to fail (because the router wouldn't handle the domain
7758 twice). Now Exim checks for this case specially, and just changes the
7759 casing of the domain that it ultimately uses when it transmits the message
7762 49. Added Sieve (RFC 3028) support, courtesy of Michael Haardt's contributed
7765 50. If a filter generated a file delivery with a non-absolute name (possible if
7766 no home directory exists for the router), the forbid_file option was not
7769 51. Added '&' feature to dnslists, to provide bit mask matching in addition to
7770 the existing equality matching.
7772 52. Exim was using ints instead of ino_t variables in some places where it was
7773 dealing with inode numbers.
7775 53. If TMPDIR is defined in Local/Makefile (default in src/EDITME is
7776 TMPDIR="/tmp"), Exim checks for the presence of an environment variable
7777 called TMPDIR, and if it finds it is different, it changes its value.
7779 54. The smtp_printf() function is now made available to local_scan() so
7780 additional output lines can be written before returning. There is also an
7781 smtp_fflush() function to enable the detection of a dropped connection.
7782 The variables smtp_input and smtp_batched_input are exported to
7785 55. Changed the default runtime configuration: the message "Unknown user"
7786 has been removed from the ACL, and instead placed on the localuser router,
7787 using the cannot_route_message feature. This means that any verification
7788 failures that generate their own messages won't get overridden. Similarly,
7789 the "Unrouteable address" message that was in the ACL for unverifiable
7790 relay addresses has also been removed.
7792 56. Added hosts_avoid_esmtp to the smtp transport.
7794 57. The exicyclog script was not checking for the esoteric option
7795 CONFIGURE_FILE_USE_EUID in the Local/Makefile. It now does this, but it
7796 will work only if exicyclog is run under the appropriate euid.
7798 58. Following a discussion on the list, the rules by which Exim recognises line
7799 endings on incoming messages have been changed. The -dropcr and drop_cr
7800 options are now no-ops, retained only for backwards compatibility. The
7801 following line terminators are recognized: LF CRLF CR. However, special
7802 processing applies to CR:
7804 (i) The sequence CR . CR does *not* terminate an incoming SMTP message,
7805 nor a local message in the state where . is a terminator.
7807 (ii) If a bare CR is encountered in a header line, an extra space is added
7808 after the line terminator so as not to end the header. The reasoning
7809 behind this is that bare CRs in header lines are most likely either
7810 to be mistakes, or people trying to play silly games.
7812 59. The size of a message, as listed by "-bp" or in the Exim monitor window,
7813 was being incorrectly given as 18 bytes larger than it should have been.
7814 This is a VOB (very old bug).
7816 60. This may never have affected anything current, but just in case it has:
7817 When the local host is found other than at the start of a list of hosts,
7818 the local host, those with the same MX, and any that follow, are discarded.
7819 When the list in question was part of a longer list of hosts, the following
7820 hosts (not currently being processed) were also being discarded. This no
7821 longer happens. I'm not sure if this situation could ever has previously
7824 61. Added the "/MX" feature to lists of hosts in the manualroute and query
7827 62. Whenever Exim generates a new message, it now adds an Auto-Submitted:
7828 header. This is something that is recommended in a new Internet Draft, and
7829 is something that is documented as being done by Sendmail. There are two
7830 possible values. For messages generated by the autoreply transport, Exim
7833 Auto-Submitted: auto-replied
7835 whereas for all other generated messages (e.g. bounces) it adds
7837 Auto-Submitted: auto-generated
7839 63. The "personal" condition in filters now includes a test for the
7840 Auto-Submitted: header. If it contains the string "auto-" the message it
7841 not considered personal.
7843 64. Added rcpt_include_affixes as a generic transport option.
7845 65. Added queue_only_override (default true).
7847 66. Added the syslog_duplication option.
7849 67. If what should have been the first header line of a message consisted of
7850 a space followed by a colon, Exim was mis-interpreting it as a header line.
7851 It isn't of course - it is syntactically invalid and should therefore be
7852 treated as the start of the message body. The misbehaviour could have
7853 caused a number of strange effects, including loss of data in subsequent
7854 header lines, and spool format errors.
7856 68. Formerly, the AUTH parameter on a MAIL command was trusted only if the
7857 client host had authenticated. This control can now be exercised by an ACL
7858 for more flexibility.
7860 69. By default, callouts do not happen when testing with -bh. There is now a
7861 variant, -bhc, which does actually run the callout code, including
7862 consulting and updating the callout cache.
7864 70. Added support for saslauthd authentication, courtesy of Alexander
7867 71. If statvfs() failed on the spool or log directories while checking their
7868 size for availability, Exim confusingly gave the error "space shortage".
7869 Furthermore, in debugging mode it crashed with a floating point exception.
7870 These checks are done if check_{spool,log}_{space,inodes} are set, and when
7871 an SMTP message arrives with SIZE= on the MAIL command. As this is a really
7872 serious problem, Exim now writes to the main and panic logs when this
7873 happens, with details of the failure. It then refuses to accept the
7874 incoming message, giving the message "spool directory problem" or "log
7875 directory problem" with a 421 code for SMTP messages.
7877 72. When Exim is about to re-exec itself, it ensures that the file descriptors
7878 0, 1, and 2 exist, because some OS complain for execs without them (see
7879 ChangeLog 4.05/30). If necessary, Exim opens /dev/null to use for these
7880 descriptors. However, the code omitted to check that the open succeeded,
7881 causing mysterious errors if for some reason the permissions on /dev/null
7882 got screwed. Now Exim writes a message to the main and panic logs, and
7883 bombs out if it can't open /dev/null.
7885 73. Re-vamped the way daemon_smtp_port, local_interfaces, and -oX work and
7886 interact so that it is all more flexible. It is supposed to remain
7887 backwards compatible. Also added extra_local_interfaces.
7889 74. Invalid data sent to a SPA (NTLM) server authenticator could cause the code
7890 to bomb out with an assertion failure - to the client this appears as a
7891 connection drop. This problem occurs in the part of the code that was taken
7892 from the Samba project. Fortunately, the assertion is in a very simple
7893 function, so I have fixed this by reproducing the function inline in the
7894 one place where it is called, and arranging for authentication to fail
7895 instead of killing the process with assert().
7897 75. The SPA client code was not working when the server requested OEM rather
7898 than Unicode encoding.
7900 76. Added code to make require_files with a specific uid setting more usable in
7901 the case where statting the file as root fails - usually a non-root-mounted
7902 NFS file system. When this happens and the failure is EACCES, Exim now
7903 forks a subprocess and does the per-uid checking as the relevant uid.
7905 77. Added process_log_path.
7907 78. If log_file_path was not explicitly set, a setting of check_log_space or
7908 check_log_inodes was ignored.
7910 79. If a space check for the spool or log partitions fails, the incident is now
7911 logged. Of course, in the latter case the data may get lost...
7913 80. Added the %p formatting code to string_format() so that it can be used to
7914 print addresses in debug_print(). Adjusted all the address printing in the
7915 debugging in store.c to use %p rather than %d.
7917 81. There was a concern that a line of code in smtp_in.c could overflow a
7918 buffer if a HELO/EHLO command was given followed by 500 or so spaces. As
7919 initially expressed, the concern was not well-founded, because trailing
7920 spaces are removed early. However, if the trailing spaces were followed by
7921 a NULL, they did not get removed, so the overflow was possible. Two fixes
7924 (a) I re-wrote the offending code in a cleaner fashion.
7925 (b) If an incoming SMTP command contains a NULL character, it is rejected
7928 82. When Exim changes uid/gid to the Exim user at daemon start time, it now
7929 runs initgroups(), so that if the Exim user is in any additional groups,
7930 they will be used during message reception.
7936 The change log for 4.20 and earlier releases has been archived.
git://git.exim.org / exim.git / blob