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.
8 JH/01 Move the wait-for-next-tick (needed for unique messmage IDs) from
9 after reception to before a subsequent reception. This should
10 mean slightly faster delivery, and also confirmation of reception
13 JH/02 Move from using the pcre library to pcre2. The former is no longer
14 being developed or supported (by the original developer).
16 JH/03 Constification work in the filters module required a major version
17 bump for the local-scan API. Specifically, the "headers_charset"
18 global which is visible via the API is now const and may therefore
19 not be modified by local-scan code.
21 JH/04 Fix ClamAV TCP use under FreeBSD. Previously the OS-specific shim for
22 sendfile() didi not account for the way the ClamAV driver code called it.
24 JH/05 Bug 2819: speed up command-line messages being read in. Previously a
25 time check was being done for every character; replace that with one
28 JH/06 Bug 2815: Fix ALPN sent by server under OpenSSL. Previously the string
29 sent was prefixed with a length byte.
31 JH/07 Change the SMTP feature name for pipelining connect to be compliant with
32 RFC 5321. Previously Dovecot (at least) would log errors during
35 JH/08 Remove stripping of the binaries from the FreeBSD build. This was added
36 in 4.61 without a reason logged. Binaries will be bigger, which might
37 matter on diskspace-constrained systems, but debug is easier.
39 JH/09 Fix macro-definition during "-be" expansion testing. The move to
40 write-protected store for macros had not accounted for these runtime
41 additions; fix by removing this protection for "-be" mode.
43 JH/10 Convert all uses of select() to poll(). FreeBSD 12.2 was found to be
44 handing out large-numbered file descriptors, violating the usual Unix
45 assumption (and required by Posix) that the lowest possible number will be
46 allocated by the kernel when a new one is needed. In the daemon, and any
47 child procesees, values higher than 1024 (being bigger than FD_SETSIZE)
48 are not useable for FD_SET() [and hence select()] and overwrite the stack.
49 Assorted crashes happen.
51 JH/11 Fix use of $sender_host_name in daemon process. When used in certain
52 main-section options or in a connect ACL, the value from the first ever
53 connection was never replaced for subsequent connections. Found by
56 JH/12 Bug 2838: Fix for i32lp64 hard-align platforms. Found for SPARC Linux,
57 though only once PCRE2 was introduced: the memory accounting used under
58 debug offset allocations by an int, giving a hard trap in early startup.
59 Change to using a size_t. Debug and fix by John Paul Adrian Glaubitz.
61 JH/13 Bug 2845: Fix handling of tls_require_ciphers for OpenSSL when a value
62 with underbars is given. The write-protection of configuration introduced
63 in 4.95 trapped when normalisation was applied to an option not needing
66 JH/14 Bug 1895: TLS: Deprecate RFC 5114 Diffie-Hellman parameters.
68 JH/15 Fix a resource leak in *BSD. An off-by-one error resulted in the daemon
69 failing to close the certificates directory, every hour or any time it
72 JH/16 Debugging initiated by an ACL control now continues through into routing
73 and transport processes, when delivery is immediate. Previously debugging
74 stopped any time Exim re-execs.
76 JH/17 The "expand" debug selector now gives more detail, specifically on the
77 result of expansion operators (as opposed to expansion items).
83 JH/01 Bug 1329: Fix format of Maildir-format filenames to match other mail-
84 related applications. Previously an "H" was used where available info
85 says that "M" should be, so change to match.
87 JH/02 Bug 2587: Fix pam expansion condition. Tainted values are commonly used
88 as arguments, so an implementation trying to copy these into a local
89 buffer was taking a taint-enforcement trap. Fix by using dynamically
90 created buffers. Similar fix for radius expansion condition.
92 JH/03 Bug 2586: Fix listcount expansion operator. Using tainted arguments is
93 reasonable, eg. to count headers. Fix by using dynamically created
94 buffers rather than a local. Do similar fixes for ACL actions "dcc",
95 "log_reject_target", "malware" and "spam"; the arguments are expanded
96 so could be handling tainted values.
98 JH/04 Bug 2590: Fix -bi (newaliases). A previous code rearrangement had
99 broken the (no-op) support for this sendmail command. Restore it
100 to doing nothing, silently, and returning good status.
102 JH/05 Bug 2593: Fix "vacation" in Exim filter. Previously, when a "once"
103 record path was given (or the default used) without a leading directory
104 path, an error occurred on trying to open it. Use the transport's working
107 JH/06 Bug 2594: Change the name used for certificate name checks in the smtp
108 transport. Previously it was the name on the DNS A-record; use instead
109 the head of the CNAME chain leading there (if there is one). This seems
110 to align better with RFC 6125.
112 JH/07 Bug 2597: Fix a resource leak. Using a lookup in obtaining a value for
113 smtp_accept_max_per_host allocated resources which were not released
114 when the limit was exceeded. This eventually crashed the daemon. Fix
115 by adding a release action in that path.
117 JH/08 Bug 2598: Fix verify ACL condition. The options for the condition are
118 expanded; previously using tainted values was rejected. Fix by using
119 dynamically-created buffers.
121 JH/09 Relax restrictions on ACL verify condition needing access to message
122 headers. Previously they were only permitted in data and non-smtp ACLs;
123 permit also mime, dkim, prdr quit and notquit. Applies to header-syntax,
124 not_blind, header_sender and header_names_ascii verification.
126 JH/10 Bug 2603: Fix coding of string copying to only evaluate arguments once.
127 Previously a macro used one argument twice; when called with the
128 argument as an expression having side-effects, incorrect operation
129 resulted. Use an inlineable function.
131 JH/11 Bug 2604: Fix request to cutthrough-deliver when a connection is already
132 held open for a verify callout. Previously this wan not accounted for
133 and a corrupt onward SMTP conversation resulted.
135 JH/12 Bug 2607: Fix the ${srs_encode } expansion to handle quoted local_parts.
136 Previously they were embedded naively in the constructed address; when
137 needed, strip the quoting and quote the entire local_part.
138 Also make the inbound_srs expansion condition handle quoting.
140 JH/13 Fix dsearch "subdir" filter to ignore ".". Previously only ".." was
141 excluded, not matching the documentation.
143 JH/14 Bug 2606: Fix a segfault in sqlite lookups. When no, or a bad, filename
144 was given for the sqlite_dbfile a trap resulted.
146 JH/15 Bug 2620: Fix "spam" ACL condition. Previously, tainted values for the
147 "name" argument resulted in a trap. There is no reason to disallow such;
148 this was a coding error.
150 JH/16 Bug 2615: Fix pause during message reception, on systems that have been
151 suspended/resumed. The Linux CLOCK_MONOTONIC does not account for time
152 spent suspended, ignoring the POSIX definition. Previously we assumed
153 it did and a constant offset from real time could be used as a correction.
154 Change to using the same clock source for the start-of-message and the
155 post-message next-tick-wait. Also change to using CLOCK_BOOTTIME if it
156 exists, just to get a clock slightly more aligned to reality.
158 JH/17 Bug 2295: Fix DKIM signing to always semicolon-terminate. Although the
159 RFC says it is optional some validators care. The missing char was not
160 intended but triggered by a line-wrap alignment. Discovery and fix by
161 Guillaume Outters, hacked on by JH.
163 JH/18 Bug 2617: Fix a taint trap in parse_fix_phrase(). Previously when the
164 name being quoted was tainted a trap would be taken. Fix by using
165 dynamically created buffers. The routine could have been called by a
166 rewrite with the "h" flag, by using the "-F" command-line option, or
167 by using a "name=" option on a control=submission ACL modifier.
169 JH/19 SPF: change the Authentication-Results expansion component to give
170 smtp.helo when the sender domain is empty. Previously it gave
173 JH/20 Bug 2631: ACL dnslist conditions now ignore and log any lookups returns
174 not in 127.0.0.0/8 to help in spotting list domains taken over by a
175 domain-parking registrar.
177 JH/21 Bug 2630: Fix eol-replacement string for the ${readsocket } expansion.
178 Previously when a whitespace character was specified it was not inserted
179 after removing the newline.
181 JH/22 Bug 2265: Force SNI usage for smtp transport DANE'd connections, to be
182 the domain part of the recipient address. This overrides any tls_sni
183 option set, which was previously used.
185 JH/23 Logging: with the +tls_sni log_selector, do not wrap the received SNI
188 JH/24 Bug 2634: Fix a taint trap seen on NetBSD: the testing coded for
189 is_tainted() had an off-by-one error in the overenthusiastic direction.
190 Find and fix by Gavan. Although NetBSD is not a supported platform for
191 4.94 this bug could affect other platforms.
193 PP/01 Fix default prime selection to be consistent.
194 One path used ike23 still, instead of exim.dev.20160529.3; now both
195 execution flows will use the same DH primes (currently
196 exim.dev.20160529.3).
198 JH/25 OpenSSL: Fix back-compatibility behaviour surrounding tls_certificates
199 option in smtp transport, to match the documentation. Previously
200 verification was not being done in some cases where it should have been.
202 JH/26 Bug 2646: fix a memory usage issue in ldap lookups. Previously, when more
203 than one server was defined and depending on the platform memory layout
204 details, an internal consistency trap could be hit while walking the list
207 JH/27 Bug 2648: fix the passing of an authenticator public-name through spool
208 files. The value is used by the authresults expansion item. Previously
209 if this was used in a router or transport, a crash could result.
211 JH/28 Fix spurious logging of select error. Some platforms, notably FreeBSD,
212 have a sufficient incidence of EINTR returns from select that an
213 interaction with other operations done by the main daemon loop exposed
214 a bug in the error-handling. This was benign apart from the log
217 JH/29 Bug 2675: add outgoing-interface I= element to deferred "==" log lines,
218 for consistency with delivered "=>" and failed "**" lines. While we're
219 there, handle PRX and TFO.
221 JH/30 Bug 2677: fix matching of long addresses. Since 4.93 a limit of 256 was
222 applied. This resulted, if any header-line rewrite rules were configured,
223 in a panic-log triggerable by sending a message with a long address in
224 a header. Fix by increasing the arbitrary limit to larger than a single
225 (dewrapped) 5322 header line maximum size.
227 JH/31 The ESMTP option name advertised for the SUPPORT_EARLY_PIPE build option
228 is changed from X_PIPE_CONNECT to PIPE_CONNECT. This is in line with
229 RFC 6648 which deprecates X- options in protocols as a general practice.
230 Changeover between the implementations is handled by the mechanisms
233 JH/32 Bug 2599: fix delay of delivery to a local address where there is also
234 a remote which uses callout/hold. Previously the local was queued.
236 JH/33 Fix a taint trap in the ${listextract } expansion when the source data
239 JH/34 Fix the placement of a multiple-message delivery marker in the delivery
240 log line. The asterisk is now consistently appended to the remote IP
241 (and port, if given), and will also be provided on defer and fail log
242 lines. Previously it could be placed on the local IP if that was being
243 logged, and was only provided on delivery lines.
245 JH/35 Bug 2343: Harden exim_tidydb against corrupt wait- files.
247 JH/36 Bug 2687: Fix interpretation of multiple ^ chars in a plaintext
248 authenticator client_send option. Previously the next char, after a pair
249 was collapsed, was taken verbatim (so ^^^foo became ^^foo; ^^^^foo became
250 ^^\x00foo). Fixed to get ^\x00foo and ^^foo respectively to match the
251 documentation. There is still no way to get a leading ^ immediately
252 after a NUL (ie. for the password of a PLAIN method authenticator.
254 JH/37 Enforce the expected size, for fixed-size records read from hints-DB
255 files. For bad sizes read, delete the record and whine to paniclog.
257 JH/38 When logging an AUTH failure, as server, do not include sensitive
258 information. Previously, the credentials would be included if given
259 as part of the AUTH command line and an ACL denied authentication.
261 JH/39 Bug 2691: fix $local_part_data. When the matching list element
262 referred to a file, bad data was returned. This likely also affected
265 JH/40 The gsasl authenticator now supports caching of the salted password
266 generated by the client-side implementation. This required the addition
267 of a new variable: $auth4.
269 JH/41 Fix daemon SIGHUP on FreeBSD. Previously, a named socket for IPC was
270 left undeleted; the attempt to re-create it then failed - resulting in
271 the usual "SIGHUP tp have daemon reload configuration" to not work.
272 This affected any platform not supporting "abstract" Unix-domain
273 sockets (i.e. not Linux).
275 JH/42 Bug 2693: Harden against a peer which reneges on a 452 "too many
276 recipients" response to RCPT in a later response, with a 250. The
277 previous coding assumed this would not happen, and under PIPELINING
278 would result in both lost and duplicate recipients for a message.
280 JH/43 Bug 2694: Fix weighted distribution of work to multiple spamd servers.
281 Previously the weighting was incorrectly applied. Similar fix for socks
282 proxies. Found and fixed by Heiko Schlichting.
284 JH/44 Bug 2701: Fix list-expansion of dns_ipv4_lookup. Previously, it did
285 not handle sub-lists included using the +namedlist syntax. While
286 investigating, the same found for dns_trust_aa, dns_again_means_nonexist,
287 dnssec_require_domains, dnssec_request_domains, srv_fail_domains,
290 JH/45 Use a (new) separate store pool-pair for DKIM verify working data.
291 Previously the permanent pool was used, so the sore could not be freed.
292 This meant a connection with many messages would use continually-growing
295 JH/46 Use an exponentially-increasing block size when malloc'ing store. Do it
296 per-pool so as not to waste too much space. Previously a constant size
297 was used which resulted in O(n^2) behaviour; now we get O(n log n) making
298 DOS attacks harder. The cost is wasted memory use in the larger blocks.
300 JH/47 Use explicit alloc/free for DNS lookup workspace. This permits using the
301 same space repeatedly, and a smaller process footprint.
303 JH/48 Use a less bogus-looking filename for a temporary used for DH-parameters
304 for GnuTLS. Previously the name started "%s" which, while not a bug,
305 looked as if if might be one.
307 JH/49 Bug 2710: when using SOCKS for additional messages after the first (a
308 "continued connection") make the $proxy_* variables available. Previously
309 the information was not passed across the exec() call for subsequent
310 transport executions. This also mean that the log lines for the
311 messages can show the proxy information.
313 JH/50 Bug 2672: QT elements in log lines, unless disabled, now exclude the
314 receive time. With modern systems the difference is significant.
315 The historical behaviour can be restored by disabling (a new) log_selector
316 "queue_time_exclusive".
318 JH/51 Taint-check ACL line. Previously, only filenames (for out-of-line ACL
319 content) were specifically tested for. Now, also cover expansions
320 resulting in ACL names and inline ACL content.
322 JH/52 Fix ${ip6norm:} operator. Previously, any trailing line text was dropped,
323 making it unusable in complex expressions.
325 JH/53 Bug 2743: fix immediate-delivery via named queue. Previously this would
326 fail with a taint-check on the spoolfile name, and leave the message
329 HS/01 Enforce absolute PID file path name.
331 HS/02 Handle SIGINT as we handle SIGTERM: terminate the Exim process.
333 PP/01 Add a too-many-bad-recipients guard to the default config's RCPT ACL.
335 PP/02 Bug 2643: Correct TLS DH constants.
336 A missing NUL termination in our code-generation tool had led to some
337 incorrect Diffie-Hellman constants in the Exim source.
338 Reported by kylon94, code-gen tool fix by Simon Arlott.
340 PP/03 Impose security length checks on various command-line options.
341 Fixes CVE-2020-SPRSS reported by Qualys.
343 PP/04 Fix Linux security issue CVE-2020-SLCWD and guard against PATH_MAX
344 better. Reported by Qualys.
346 PP/05 Fix security issue CVE-2020-PFPSN and guard against cmdline invoker
347 providing a particularly obnoxious sender full name.
350 PP/06 Fix CVE-2020-28016 (PFPZA): Heap out-of-bounds write in parse_fix_phrase()
352 PP/07 Refuse to allocate too little memory, block negative/zero allocations.
355 PP/08 Change default for recipients_max from unlimited to 50,000.
357 PP/09 Fix security issue with too many recipients on a message (to remove a
358 known security problem if someone does set recipients_max to unlimited,
359 or if local additions add to the recipient list).
360 Fixes CVE-2020-RCPTL reported by Qualys.
362 PP/10 Fix security issue in SMTP verb option parsing
363 Fixes CVE-2020-EXOPT reported by Qualys.
365 PP/11 Fix security issue in BDAT state confusion.
366 Ensure we reset known-good where we know we need to not be reading BDAT
367 data, as a general case fix, and move the places where we switch to BDAT
368 mode until after various protocol state checks.
369 Fixes CVE-2020-BDATA reported by Qualys.
371 HS/03 Die on "/../" in msglog file names
373 QS/01 Creation of (database) files in $spool_dir: only uid=0 or the uid of
374 the Exim runtime user are allowed to create files.
376 QS/02 PID file creation/deletion: only possible if uid=0 or uid is the Exim
379 QS/03 When reading the output from interpreted forward files we do not
380 pass the pipe between the parent and the interpreting process to
381 executed child processes (if any).
383 QS/04 Always die if requested from internal logging, even is logging is
386 JH/54 DMARC: recent versions of the OpenDMARC library appear to have broken
387 the API; compilation noo longer completes with DMARC support included.
388 This affects 1.4.1-1 on Fedora 33 (1.3.2-3 is functional); and has
389 been reported on other platforms.
391 JH/55 TLS: as server, reject connections with ALPN indicating non-smtp use.
393 JH/56 Make the majority of info read from config files readonly, for defence-in-
394 depth against exploits. Suggestion by Qualys.
395 Not supported on Solaris 10.
397 JH/57 Fix control=fakreject for a custom message containing tainted data.
398 Previously this resulted in a log complaint, due to a re-expansion present
399 since fakereject was originally introduced.
401 JH/58 GnuTLS: Fix certextract expansion. If a second modifier after a tag
402 modifier was given, a loop resulted.
404 JH/59 DKIM: Fix small-message verification under TLS with chunking. If a
405 pipelined SMTP command followed the BDAT LAST then it would be
406 incorrectly treated as part of the message body, causing a verification
409 JH/60 Bug 2805: Fix logging of domain-literals in Message_ID: headers. They
410 require looser validation rules than those for 821-level addresses,
411 which only permit IP addresses.
417 JH/01 Avoid costly startup code when not strictly needed. This reduces time
418 for some exim process initialisations. It does mean that the logging
419 of TLS configuration problems is only done for the daemon startup.
421 JH/02 Early-pipelining support code is now included unless disabled in Makefile.
423 JH/03 DKIM verification defaults no long accept sha1 hashes, to conform to
424 RFC 8301. They can still be enabled, using the dkim_verify_hashes main
427 JH/04 Support CHUNKING from an smtp transport using a transport_filter, when
428 DKIM signing is being done. Previously a transport_filter would always
429 disable CHUNKING, falling back to traditional DATA.
431 JH/05 Regard command-line recipients as tainted.
433 JH/06 Bug 340: Remove the daemon pid file on exit, when due to SIGTERM.
435 JH/07 Bug 2489: Fix crash in the "pam" expansion condition. It seems that the
436 PAM library frees one of the arguments given to it, despite the
437 documentation. Therefore a plain malloc must be used.
439 JH/08 Bug 2491: Use tainted buffers for the transport smtp context. Previously
440 on-stack buffers were used, resulting in a taint trap when DSN information
441 copied from a received message was written into the buffer.
443 JH/09 Bug 2493: Harden ARC verify against Outlook, whick has been seen to mix
444 the ordering of its ARC headers. This caused a crash.
446 JH/10 Bug 2492: Use tainted memory for retry record when needed. Previously when
447 a new record was being constructed with information from the peer, a trap
450 JH/11 Bug 2494: Unset the default for dmarc_tld_file. Previously a naiive
451 installation would get error messages from DMARC verify, when it hit the
452 nonexistent file indicated by the default. Distros wanting DMARC enabled
453 should both provide the file and set the option.
454 Also enforce no DMARC verification for command-line sourced messages.
456 JH/12 Fix an uninitialised flag in early-pipelining. Previously connections
457 could, depending on the platform, hang at the STARTTLS response.
459 JH/13 Bug 2498: Reset a counter used for ARC verify before handling another
460 message on a connection. Previously if one message had ARC headers and
461 the following one did not, a crash could result when adding an
462 Authentication-Results: header.
464 JH/14 Bug 2500: Rewind some of the common-coding in string handling between the
465 Exim main code and Exim-related utities. The introduction of taint
466 tracking also did many adjustments to string handling. Since then, eximon
467 frequently terminated with an assert failure.
469 JH/15 When PIPELINING, synch after every hundred or so RCPT commands sent and
470 check for 452 responses. This slightly helps the inefficieny of doing
471 a large alias-expansion into a recipient-limited target. The max_rcpt
472 transport option still applies (and at the current default, will override
473 the new feature). The check is done for either cause of synch, and forces
474 a fast-retry of all 452'd recipients using a new MAIL FROM on the same
475 connection. The new facility is not tunable at this time.
477 JH/16 Fix the variables set by the gsasl authenticator. Previously a pointer to
478 library live data was being used, so the results became garbage. Make
479 copies while it is still usable.
481 JH/17 Logging: when the deliver_time selector ise set, include the DT= field
482 on delivery deferred (==) and failed (**) lines (if a delivery was
483 attemtped). Previously it was only on completion (=>) lines.
485 JH/18 Authentication: the gsasl driver not provides the $authN variables in time
486 for the expansion of the server_scram_iter and server_scram_salt options.
488 WB/01 SPF: DNS lookups for the obsolete SPF RR type done by the libspf2 library
489 are now specifically given a NO_DATA response without hitting the system
490 resolver. The library goes on to do the now-standard TXT lookup.
491 Use of dnsdb lookups is not affected.
493 JH/19 Bug 2507: Modules: on handling a dynamic-module (lookups) open failure,
494 only retrieve the errormessage once. Previously two calls to dlerror()
495 were used, and the second one (for mainlog/paniclog) retrieved null
498 JH/20 Taint checking: disallow use of tainted data for
499 - the appendfile transport file and directory options
500 - the pipe transport command
501 - the autoreply transport file, log and once options
502 - file names used by the redirect router (including filter files)
504 - paths used by single-key lookups
505 Previously this was permitted.
507 JH/21 Bug 2501: Fix init call in the heimdal authenticator. Previously it
508 adjusted the size of a major service buffer; this failed because the
509 buffer was in use at the time. Change to a compile-time increase in the
510 buffer size, when this authenticator is compiled into exim.
512 JH/22 Taint-checking: move to safe-mode taint checking on all platforms. The
513 previous fast-mode was untenable in the face of glibs using mmap to
514 support larger malloc requests.
516 PP/01 Update the openssl_options possible values through OpenSSL 1.1.1c.
517 New values supported, if defined on system where compiled:
518 allow_no_dhe_kex, cryptopro_tlsext_bug, enable_middlebox_compat,
519 no_anti_replay, no_encrypt_then_mac, prioritize_chacha, tlsext_padding
521 JH/23 Performance improvement in the initial phase of a two-pass queue run. By
522 running a limited number of proceses in parallel, a benefit is gained. The
523 amount varies with the platform hardware and load. The use of the option
524 queue_run_in_order means we cannot do this, as ordering becomes
527 JH/24 Bug 2524: fix the cyrus_sasl auth driver gssapi usage. A previous fix
528 had introduced a string-copy (for ensuring NUL-termination) which was not
529 appropriate for that case, which can include embedded NUL bytes in the
530 block of data. Investigation showed the copy to actually be needless, the
531 data being length-specified.
533 JH/25 Fix use of concurrent TLS connections under GnuTLS. When a callout was
534 done during a receiving connection, and both used TLS, global info was
535 used rather than per-connection info for tracking the state of data
536 queued for transmission. This could result in a connection hang.
538 JH/26 Fix use of the SIZE parameter on MAIL commands, on continued connections.
539 Previously, when delivering serveral messages down a single connection
540 only the first would provide a SIZE. This was due to the size information
541 not being properly tracked.
543 JH/27 Bug 2530: When operating in a timezone with sub-minute offset, such as
544 TAI (at 37 seconds currently), pretend to be in UTC for time-related
545 expansion and logging. Previously, spurious values such as a future
546 minute could be seen.
548 JH/28 Bug 2533: Fix expansion of ${tr } item. When called in some situations
549 it could crash from a null-deref. This could also affect the
550 ${addresses: } operator and ${readsock } item.
552 JH/29 Bug 2537: Fix $mime_part_count. When a single connection had a non-mime
553 message following a mime one, the variable was not reset.
555 JH/30 When an pipelined-connect fails at the first response, assume incorrect
556 cached capability (perhaps the peer reneged?) and immediately retry in
559 JH/31 Fix spurious detection of timeout while writing to transport filter.
561 JH/32 Bug 2541: Fix segfault on bad cmdline -f (sender) argument. Previously
562 an attempt to copy the string was made before checking it.
564 JH/33 Fix the dsearch lookup to return an untainted result. Previously the
565 taint of the lookup key was maintained; we now regard the presence in the
566 filesystem as sufficient validation.
568 JH/34 Fix the readsocket expansion to not segfault when an empty "options"
569 argument is supplied.
571 JH/35 The dsearch lookup now requires that the directory is an absolute path.
572 Previously this was not checked, and nonempty relative paths made an
573 access under Exim's current working directory.
575 JH/36 Bug 2554: Fix msg:defer event for the hosts_max_try_hardlimit case.
576 Previously no event was raised.
578 JH/37 Bug 2552: Fix the check on spool space during reception to use the SIZE
579 parameter supplied by the sender MAIL FROM command. Previously it was
580 ignored, and only the check_spool_space option value for the required
583 JH/38 Fix $dkim_key_length. This should, after a DKIM verification, present
584 the size of the signing public-key. Previously it was instead giving
585 the size of the signature hash.
587 JH/39 DKIM verification: the RFC 8301 restriction on sizes of RSA keys is now
588 the default. See the (new) dkim_verify_min_keysizes option.
590 JH/40 Fix a memory-handling bug: when a connection carried multiple messages
591 and an ACL use a lookup for checking either the local_part or domain,
592 stale data could be accessed. Ensure that variable references are
593 dropped between messages.
595 JH/41 Bug 2571: Fix SPA authenticator. Running as a server, an offset supplied
596 by the client was not checked as pointing within response data before
597 being used. A malicious client could thus cause an out-of-bounds read and
598 possibly gain authentication. Fix by adding the check.
600 JH/42 Internationalisation: change the default for downconversion in the smtp
601 transport to be "if needed". Previously it was "as previously set" for
602 the message, which usually meant "if needed" for message-submission but
603 "no" for everything else. However, MTAs have been seen using SMTPUTF8
604 even when the envelope addresses did not need it, resulting in forwarding
605 failures to non-supporting MTAs. A downconvert in such cases will be
606 a no-op on the addresses, merely dropping the use of SMTPUTF8 by the
607 transport. The change does mean that addresses needing conversion will
608 be converted when previously a delivery failure would occur.
610 JH/43 Fix possible long line in DSN. Previously when a very long SMTP error
611 response was received it would be used unchecked in a fail-DSN, violating
612 standards on line-length limits. Truncate if needed.
614 HS/01 Remove parameters of the link to www.open-spf.org. The linked form
615 doesn't work. (Additionally add a new main config option to configure the
622 JH/01 OpenSSL: With debug enabled output keying information sufficient, server
623 side, to decode a TLS 1.3 packet capture.
625 JH/02 OpenSSL: Suppress the sending of (stateful) TLS1.3 session tickets.
626 Previously the default library behaviour applied, sending two, each in
629 JH/03 Debug output for ACL now gives the config file name and line number for
632 JH/04 The default received_header_text now uses the RFC 8314 tls cipher clause.
634 JH/05 DKIM: ensure that dkim_domain elements are lowercased before use.
636 JH/06 Fix buggy handling of autoreply bounce_return_size_limit, and a possible
637 buffer overrun for (non-chunking) other transports.
639 JH/07 GnuTLS: Our use of late (post-handshake) certificate verification, under
640 TLS1.3, means that a server rejecting a client certificate is not visible
641 to the client until the first read of encrypted data (typically the
642 response to EHLO). Add detection for that case and treat it as a failed
643 TLS connection attempt, so that the normal retry-in-clear can work (if
644 suitably configured).
646 JB/01 Bug 2375: fix expansions of 822 addresses having comments in local-part
647 and/or domain. Found and fixed by Jason Betts.
649 JH/08 Add hardening against SRV & TLSA lookups the hit CNAMEs (a nonvalid
650 configuration). If a CNAME target was not a wellformed name pattern, a
653 JH/09 Logging: Fix initial listening-on line for multiple ports for an IP when
654 the OS reports them interleaved with other addresses.
656 JH/10 OpenSSL: Fix aggregation of messages. Previously, when PIPELINING was
657 used both for input and for a verify callout, both encrypted, SMTP
658 responses being sent by the server could be lost. This resulted in
659 dropped connections and sometimes bounces generated by a peer sending
662 JH/11 Harden plaintext authenticator against a badly misconfigured client-send
663 string. Previously it was possible to cause undefined behaviour in a
664 library routine (usually a crash). Found by "zerons".
666 JH/12 Bug 2384: fix "-bP smtp_receive_timeout". Previously it returned no
669 JH/13 Bug 2386: Fix builds with Dane under LibreSSL 2.9.0 onward. Some old
670 API was removed, so update to use the newer ones.
672 JH/14 Bug 1891: Close the log file if receiving a non-smtp message, without
673 any timeout set, is taking a long time. Previously we would hang on to a
674 rotated logfile "forever" if the input was arriving with long gaps
675 (a previous attempt to fix addressed lack, for a long time, of initial
678 HS/01 Bug 2390: Use message_id for tempfile creation to avoid races in a
679 shared (NFS) environment. The length of the tempfile name is now
680 4 + 16 ("hdr.$message_exim_id") which might break on file
681 systems which restrict the file name length to lower values.
684 HS/02 Bug 2390: Use message_id for tempfile creation to avoid races in a
685 shared (NFS) environment.
687 HS/03 Bug 2392: exigrep does case sensitive *option* processing (as it
688 did for all versions <4.90). Notably -M, -m, --invert, -I may be
691 JH/15 Use unsigned when creating bitmasks in macros, to avoid build errors
692 on some platforms for bit 31.
694 JH/16 GnuTLS: rework ciphersuite strings under recent library versions. Thanks
695 to changes apparently associated with TLS1.3 handling some of the APIs
696 previously used were either nonfunctional or inappropriate. Strings
697 like TLS1.3:ECDHE_SECP256R1__RSA_PSS_RSAE_SHA256__AES_256_GCM__AEAD:256
698 and TLS1.2:ECDHE_SECP256R1__RSA_SHA256__AES_128_CBC__SHA256:128 replace
699 the previous TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256 .
700 This affects log line X= elements, the $tls_{in,out}_cipher variables,
701 and the use of specific cipher names in the encrypted= ACL condition.
703 JH/17 OpenSSL: the default openssl_options now disables ssl_v3.
705 JH/18 GnuTLS: fix $tls_out_ocsp under hosts_request_ocsp. Previously the
706 verification result was not updated unless hosts_require_ocsp applied.
708 JH/19 Bug 2398: fix listing of a named-queue. Previously, even with the option
709 queue_list_requires_admin set to false, non-admin users were denied the
712 JH/20 Bug 2389: fix server advertising of usable certificates, under GnuTLS in
713 directory-of-certs mode. Previously they were advertised despite the
716 JH/21 The smtp transport option "hosts_noproxy_tls" is now unset by default.
717 A single TCP connection by a client will now hold a TLS connection open
718 for multiple message deliveries, by default. Previously the default was to
721 JH/22 The smtp transport option "hosts_try_dane" now enables all hosts by
722 default. If built with the facility, DANE will be used. The facility
723 SUPPORT_DANE is now enabled in the prototype build Makefile "EDITME".
725 JH/23 The build default is now for TLS to be included; the SUPPORT_TLS define
726 is replaced with DISABLE_TLS. Either USE_GNUTLS or (the new) USE_OPENSSL
727 must be defined and you must still, unless you define DISABLE_TLS, manage
728 the the include-dir and library-file requirements that go with that
729 choice. Non-TLS builds are still supported.
731 JH/24 Fix duplicated logging of peer name/address, on a transport connection-
734 JH/25 The smtp transport option "hosts_try_fastopen" now enables all hosts by
735 default. If the platform supports and has the facility enabled, it will
736 be requested on all coneections.
738 JH/26 The PIPE_CONNECT facility is promoted from experimental status and is now
739 controlled by the build-time option SUPPORT_PIPE_CONNECT.
741 PP/01 Unbreak heimdal_gssapi, broken in 4.92.
743 JH/27 Bug 2404: Use the main-section configuration option "dsn_from" for
744 success-DSN messages. Previously the From: header was always the default
745 one for these; the option was ignored.
747 JH/28 Fix the timeout on smtp response to apply to the whole response.
748 Previously it was reset for every read, so a teergrubing peer sending
749 single bytes within the time limit could extend the connection for a
750 long time. Credit to Qualsys Security Advisory Team for the discovery.
752 JH/29 Fix DSN Final-Recipient: field. Previously it was the post-routing
753 delivery address, which leaked information of the results of local
754 forwarding. Change to the original envelope recipient address, per
757 JH/30 Bug 2411: Fix DSN generation when RFC 3461 failure notification is
758 requested. Previously not bounce was generated and a log entry of
759 error ignored was made.
761 JH/31 Avoid re-expansion in ${sort } expansion. (CVE-2019-13917)
763 JH/32 Introduce a general tainting mechanism for values read from the input
764 channel, and values derived from them. Refuse to expand any tainted
765 values, to catch one form of exploit.
767 JH/33 Bug 2413: Fix dkim_strict option. Previously the expansion result
768 was unused and the unexpanded text used for the test. Found and
769 fixed by Ruben Jenster.
771 JH/34 Fix crash after TLS shutdown. When the TCP/SMTP channel was left open,
772 an attempt to use a TLS library read routine dereffed a nul pointer,
775 JH/35 Bug 2409: filter out-of-spec chars from callout response before using
776 them in our smtp response.
778 JH/36 Have the general router option retry_use_local_part default to true when
779 any of the restrictive preconditions are set (to anything). Previously it
780 was only for check_local user. The change removes one item of manual
781 configuration which is required for proper retries when a remote router
782 handles a subset of addresses for a domain.
784 JH/37 Appendfile: when evaluating quota use (non-quota_size_regex) take the file
785 link count into consideration.
787 HS/04 Fix handling of very log lines in -H files. If a -<key> <value> line
788 caused the extension of big_buffer, the following lines were ignored.
790 JH/38 Bug 1395: Teach the DNS negative-cache about TTL value from the SOA in
791 accordance with RFC 2308. Previously there was no expiry, so a longlived
792 receive process (eg. due to ACL delays) versus a short SOA value could
795 HS/05 Handle trailing backslash gracefully. (CVE-2019-15846)
797 JH/39 Promote DMARC support to mainline.
799 JH/40 Bug 2452: Add a References: header to DSNs.
801 JH/41 With GnuTLS 3.6.0 (and later) do not attempt to manage Diffie-Hellman
802 parameters. The relevant library call is documented as "Deprecated: This
803 function is unnecessary and discouraged on GnuTLS 3.6.0 or later. Since
804 3.6.0, DH parameters are negotiated following RFC7919."
806 HS/06 Change the default of dnssec_request_domains to "*"
808 JH/42 Bug 2545: Fix CHUNKING for all RCPT commands rejected. Previously we
809 carried on and emitted a BDAT command, even when PIPELINING was not
812 JH/43 Bug 2465: Fix taint-handling in dsearch lookup. Previously a nontainted
813 buffer was used for the filename, resulting in a trap when tainted
814 arguments (eg. $domain) were used.
816 JH/44 With OpenSSL 1.1.1 (onwards) disable renegotiation for TLS1.2 and below;
817 recommended to avoid a possible server-load attack. The feature can be
818 re-enabled via the openssl_options main cofiguration option.
820 JH/45 local_scan API: documented the current smtp_printf() call. This changed
821 for version 4.90 - adding a "more data" boolean to the arguments.
822 Bumped the ABI version number also, this having been missed previously;
823 release versions 4.90 to 4.92.3 inclusive were effectively broken in
824 respect of usage of smtp_printf() by either local_scan code or libraries
825 accessed via the ${dlfunc } expansion item. Both will need coding
826 adjustment for any calls to smtp_printf() to match the new function
827 signature; a FALSE value for the new argument is always safe.
829 JH/46 FreeBSD: fix use of the sendfile() syscall. The shim was not updating
830 the file-offset (which the Linux syscall does, and exim expects); this
831 resulted in an indefinite loop.
833 JH/47 ARC: fix crash in signing, triggered when a configuration error failed
834 to do ARC verification. The Authentication-Results: header line added
835 by the configuration then had no ARC item.
837 JH/48 Bug 2784: fix shutdown=no in the ${readsocket) expansion item. Previously
838 an incorrect mode was used for reading the result, resulting in it being
845 JH/01 Remove code calling the customisable local_scan function, unless a new
846 definition "HAVE_LOCAL_SCAN=yes" is present in the Local/Makefile.
848 JH/02 Bug 1007: Avoid doing logging from signal-handlers, as that can result in
849 non-signal-safe functions being used.
851 JH/03 Bug 2269: When presented with a received message having a stupidly large
852 number of DKIM-Signature headers, disable DKIM verification to avoid
853 a resource-consumption attack. The limit is set at twenty.
855 JH/04 Add variables $arc_domains, $arc_oldest_pass for ARC verify. Fix the
856 report of oldest_pass in ${authres } in consequence, and separate out
857 some descriptions of reasons for verification fail.
859 JH/05 Bug 2273: Cutthrough delivery left a window where the received messsage
860 files in the spool were present and unlocked. A queue-runner could spot
861 them, resulting in a duplicate delivery. Fix that by doing the unlock
862 after the unlink. Investigation by Tim Stewart. Take the opportunity to
863 add more error-checking on spoolfile handling while that code is being
866 PP/01 Refuse to open a spool data file (*-D) if it's a symlink.
867 No known attacks, no CVE, this is defensive hardening.
869 JH/06 Bug 2275: The MIME ACL unlocked the received message files early, and
870 a queue-runner could start a delivery while other operations were ongoing.
871 Cutthrough delivery was a common victim, resulting in duplicate delivery.
872 Found and investigated by Tim Stewart. Fix by using the open message data
873 file handle rather than opening another, and not locally closing it (which
874 releases a lock) for that case, while creating the temporary .eml format
875 file for the MIME ACL. Also applies to "regex" and "spam" ACL conditions.
877 JH/07 Bug 177: Make a random-recipient callout success visible in ACL, by setting
878 $sender_verify_failure/$recipient_verify_failure to "random".
880 JH/08 When generating a selfsigned cert, use serial number 1 since zero is not
883 JH/09 Bug 2274: Fix logging of cmdline args when starting in an unlinked cwd.
884 Previously this would segfault.
886 JH/10 Fix ARC signing for case when DKIM signing failed. Previously this would
889 JH/11 Bug 2264: Exim now only follows CNAME chains one step by default. We'd
890 like zero, since the resolver should be doing this for us, But we need one
891 as a CNAME but no MX presence gets the CNAME returned; we need to check
892 that doesn't point to an MX to declare it "no MX returned" rather than
893 "error, loop". A new main option is added so the older capability of
894 following some limited number of chain links is maintained.
896 JH/12 Add client-ip info to non-pass iprev ${authres } lines.
898 JH/13 For receent Openssl versions (1.1 onward) use modern generic protocol
899 methods. These should support TLS 1.3; they arrived with TLS 1.3 and the
900 now-deprecated earlier definitions used only specified the range up to TLS
901 1.2 (in the older-version library docs).
903 JH/14 Bug 2284: Fix DKIM signing for body lines starting with a pair of dots.
905 JH/15 Rework TLS client-side context management. Stop using a global, and
906 explicitly pass a context around. This enables future use of TLS for
907 connections to service-daemons (eg. malware scanning) while a client smtp
908 connection is using TLS; with cutthrough connections this is quite likely.
910 JH/16 Fix ARC verification to do AS checks in reverse order.
912 JH/17 Support a "tls" option on the ${readsocket } expansion item.
914 JH/18 Bug 2287: Fix the protocol name (eg utf8esmtp) for multiple messages
915 using the SMTPUTF8 option on their MAIL FROM commands, in one connection.
916 Previously the "utf8" would be re-prepended for every additional message.
918 JH/19 Reject MAIL FROM commands with SMTPUTF8 when the facility was not advertised.
919 Previously thery were accepted, resulting in issues when attempting to
920 forward messages to a non-supporting MTA.
922 PP/02 Let -n work with printing macros too, not just options.
924 JH/20 Bug 2296: Fix cutthrough for >1 address redirection. Previously only
925 one parent address was copied, and bogus data was used at delivery-logging
926 time. Either a crash (after delivery) or bogus log data could result.
927 Discovery and analysis by Tim Stewart.
929 PP/03 Make ${utf8clean:} expansion operator detect incomplete final character.
930 Previously if the string ended mid-character, we did not insert the
931 promised '?' replacement.
933 PP/04 Documentation: current string operators work on bytes, not codepoints.
935 JH/21 Change as many as possible of the global flags into one-bit bitfields; these
936 should pack well giving a smaller memory footprint so better caching and
937 therefore performance. Group the declarations where this can't be done so
938 that the byte-sized flag variables are not interspersed among pointer
939 variables, giving a better chance of good packing by the compiler.
941 JH/22 Bug 1896: Fix the envelope from for DMARC forensic reports to be possibly
942 non-null, to avoid issues with sites running BATV. Previously reports were
943 sent with an empty envelope sender so looked like bounces.
945 JH/23 Bug 2318: Fix the noerror command within filters. It wasn't working.
946 The ignore_error flag wasn't being returned from the filter subprocess so
947 was not set for later routers. Investigation and fix by Matthias Kurz.
949 JH/24 Bug 2310: Raise a msg:fail:internal event for each undelivered recipient,
950 and a msg:complete for the whole, when a message is manually removed using
951 -Mrm. Developement by Matthias Kurz, hacked on by JH.
953 JH/25 Avoid fixed-size buffers for pathnames in DB access. This required using
954 a "Gnu special" function, asprintf() in the DB utility binary builds; I
955 hope that is portable enough.
957 JH/26 Bug 2311: Fix DANE-TA verification under GnuTLS. Previously it was also
958 requiring a known-CA anchor certificate; make it now rely entirely on the
959 TLSA as an anchor. Checking the name on the leaf cert against the name
960 on the A-record for the host is still done for TA (but not for EE mode).
962 JH/27 Fix logging of proxy address. Previously, a pointless "PRX=[]:0" would be
963 included in delivery lines for non-proxied connections, when compiled with
964 SUPPORT_SOCKS and running with proxy logging enabled.
966 JH/28 Bug 2314: Fire msg:fail:delivery event even when error is being ignored.
967 Developement by Matthias Kurz, tweaked by JH. While in that bit of code,
968 move the existing event to fire before the normal logging of message
969 failure so that custom logging is bracketed by normal logging.
971 JH/29 Bug 2322: A "fail" command in a non-system filter (file) now fires the
972 msg:fail:internal event. Developement by Matthias Kurz.
974 JH/30 Bug 2329: Increase buffer size used for dns lookup from 2k, which was
975 far too small for todays use of crypto signatures stored there. Go all
976 the way to the max DNS message size of 64kB, even though this might be
977 overmuch for IOT constrained device use.
979 JH/31 Fix a bad use of a copy function, which could be used to pointlessly
980 copy a string over itself. The library routine is documented as not
981 supporting overlapping copies, and on MacOS it actually raised a SIGABRT.
983 JH/32 For main options check_spool_space and check_inode_space, where the
984 platform supports 64b integers, support more than the previous 2^31 kB
985 (i.e. more than 2 TB). Accept E, P and T multipliers in addition to
986 the previous G, M, k.
988 JH/33 Bug 2338: Fix the cyrus-sasl authenticator to fill in the
989 $authenticated_fail_id variable on authentication failure. Previously
992 JH/34 Increase RSA keysize of autogen selfsign cert from 1024 to 2048. RHEL 8.0
993 OpenSSL didn't want to use such a weak key. Do for GnuTLS also, and for
994 more-modern GnuTLS move from GNUTLS_SEC_PARAM_LOW to
995 GNUTLS_SEC_PARAM_MEDIUM.
997 JH/35 OpenSSL: fail the handshake when SNI processing hits a problem, server
998 side. Previously we would continue as if no SNI had been received.
1000 JH/36 Harden the handling of string-lists. When a list consisted of a sole
1001 "<" character, which should be a list-separator specification, we walked
1002 off past the nul-terimation.
1004 JH/37 Bug 2341: Send "message delayed" warning MDNs (restricted to external
1005 causes) even when the retry time is not yet met. Previously they were
1006 not, meaning that when (say) an account was over-quota and temp-rejecting,
1007 and multiple senders' messages were queued, only one sender would get
1008 notified on each configured delay_warning cycle.
1010 JH/38 Bug 2351: Log failures to extract envelope addresses from message headers.
1012 JH/39 OpenSSL: clear the error stack after an SSL_accept(). With anon-auth
1013 cipher-suites, an error can be left on the stack even for a succeeding
1014 accept; this results in impossible error messages when a later operation
1017 AM/01 Bug 2359: GnuTLS: repeat lowlevel read and write operations while they
1018 return error codes indicating retry. Under TLS1.3 this becomes required.
1020 JH/40 Fix the feature-cache refresh for EXPERIMENTAL_PIPE_CONNECT. Previously
1021 it only wrote the new authenticators, resulting in a lack of tracking of
1022 peer changes of ESMTP extensions until the next cache flush.
1024 JH/41 Fix the loop reading a message header line to check for integer overflow,
1025 and more-often against header_maxsize. Previously a crafted message could
1026 induce a crash of the recive process; now the message is cleanly rejected.
1028 JH/42 Bug 2366: Fix the behaviour of the dkim_verify_signers option. It had
1029 been totally disabled for all of 4.91. Discovery and fix by "Mad Alex".
1035 GF/01 DEFER rather than ERROR on redis cluster MOVED response.
1036 When redis_servers is set to a list of > 1 element, and the Redis servers
1037 in that list are in cluster configuration, convert the REDIS_REPLY_ERROR
1038 case of MOVED into a DEFER case instead, thus moving the query onto the
1039 next server in the list. For a cluster of N elements, all N servers must
1040 be defined in redis_servers.
1042 GF/02 Catch and remove uninitialized value warning in exiqsumm
1043 Check for existence of @ARGV before looking at $ARGV[0]
1045 JH/01 Replace the store_release() internal interface with store_newblock(),
1046 which internalises the check required to safely use the old one, plus
1047 the allocate and data copy operations duplicated in both (!) of the
1048 extant use locations.
1050 JH/02 Disallow '/' characters in queue names specified for the "queue=" ACL
1051 modifier. This matches the restriction on the commandline.
1053 JH/03 Fix pgsql lookup for multiple result-tuples with a single column.
1054 Previously only the last row was returned.
1056 JH/04 Bug 2217: Tighten up the parsing of DKIM signature headers. Previously
1057 we assumed that tags in the header were well-formed, and parsed the
1058 element content after inspecting only the first char of the tag.
1059 Assumptions at that stage could crash the receive process on malformed
1062 JH/05 Bug 2215: Fix crash associated with dnsdb lookup done from DKIM ACL.
1063 While running the DKIM ACL we operate on the Permanent memory pool so that
1064 variables created with "set" persist to the DATA ACL. Also (at any time)
1065 DNS lookups that fail create cache records using the Permanent pool. But
1066 expansions release any allocations made on the current pool - so a dnsdb
1067 lookup expansion done in the DKIM ACL releases the memory used for the
1068 DNS negative-cache, and bad things result. Solution is to switch to the
1069 Main pool for expansions.
1070 While we're in that code, add checks on the DNS cache during store_reset,
1071 active in the testsuite.
1072 Problem spotted, and debugging aided, by Wolfgang Breyha.
1074 JH/06 Fix issue with continued-connections when the DNS shifts unreliably.
1075 When none of the hosts presented to a transport match an already-open
1076 connection, close it and proceed with the list. Previously we would
1077 queue the message. Spotted by Lena with Yahoo, probably involving
1080 JH/07 Bug 2214: Fix SMTP responses resulting from non-accept result of MIME ACL.
1081 Previously a spurious "250 OK id=" response was appended to the proper
1084 JH/08 The "support for" informational output now, which built with Content
1085 Scanning support, has a line for the malware scanner interfaces compiled
1086 in. Interface can be individually included or not at build time.
1088 JH/09 The "aveserver", "kavdaemon" and "mksd" interfaces are now not included
1089 by the template makefile "src/EDITME". The "STREAM" support for an older
1090 ClamAV interface method is removed.
1092 JH/10 Bug 2223: Fix mysql lookup returns for the no-data case (when the number of
1093 rows affected is given instead).
1095 JH/11 The runtime Berkeley DB library version is now additionally output by
1096 "exim -d -bV". Previously only the compile-time version was shown.
1098 JH/12 Bug 2230: Fix cutthrough routing for nonfirst messages in an initiating
1099 SMTP connection. Previously, when one had more recipients than the
1100 first, an abortive onward connection was made. Move to full support for
1101 multiple onward connections in sequence, handling cutthrough connection
1102 for all multi-message initiating connections.
1104 JH/13 Bug 2229: Fix cutthrough routing for nonstandard port numbers defined by
1105 routers. Previously, a multi-recipient message would fail to match the
1106 onward-connection opened for the first recipient, and cause its closure.
1108 JH/14 Bug 2174: A timeout on connect for a callout was also erroneously seen as
1109 a timeout on read on a GnuTLS initiating connection, resulting in the
1110 initiating connection being dropped. This mattered most when the callout
1111 was marked defer_ok. Fix to keep the two timeout-detection methods
1114 JH/15 Relax results from ACL control request to enable cutthrough, in
1115 unsupported situations, from error to silently (except under debug)
1116 ignoring. This covers use with PRDR, frozen messages, queue-only and
1119 HS/01 Fix Buffer overflow in base64d() (CVE-2018-6789)
1121 JH/16 Fix bug in DKIM verify: a buffer overflow could corrupt the malloc
1122 metadata, resulting in a crash in free().
1124 PP/01 Fix broken Heimdal GSSAPI authenticator integration.
1125 Broken in f2ed27cf5, missing an equals sign for specified-initialisers.
1126 Broken also in d185889f4, with init system revamp.
1128 JH/17 Bug 2113: Fix conversation closedown with the Avast malware scanner.
1129 Previously we abruptly closed the connection after reading a malware-
1130 found indication; now we go on to read the "scan ok" response line,
1133 JH/18 Bug 2239: Enforce non-usability of control=utf8_downconvert in the mail
1134 ACL. Previously, a crash would result.
1136 JH/19 Speed up macro lookups during configuration file read, by skipping non-
1137 macro text after a replacement (previously it was only once per line) and
1138 by skipping builtin macros when searching for an uppercase lead character.
1140 JH/20 DANE support moved from Experimental to mainline. The Makefile control
1141 for the build is renamed.
1143 JH/21 Fix memory leak during multi-message connections using STARTTLS. A buffer
1144 was allocated for every new TLS startup, meaning one per message. Fix
1145 by only allocating once (OpenSSL) or freeing on TLS-close (GnuTLS).
1147 JH/22 Bug 2236: When a DKIM verification result is overridden by ACL, DMARC
1148 reported the original. Fix to report (as far as possible) the ACL
1149 result replacing the original.
1151 JH/23 Fix memory leak during multi-message connections using STARTTLS under
1152 OpenSSL. Certificate information is loaded for every new TLS startup,
1153 and the resources needed to be freed.
1155 JH/24 Bug 2242: Fix exim_dbmbuild to permit directoryless filenames.
1157 JH/25 Fix utf8_downconvert propagation through a redirect router. Previously it
1160 JH/26 Bug 2253: For logging delivery lines under PRDR, append the overall
1161 DATA response info to the (existing) per-recipient response info for
1162 the "C=" log element. It can have useful tracking info from the
1163 destination system. Patch from Simon Arlott.
1165 JH/27 Bug 2251: Fix ldap lookups that return a single attribute having zero-
1166 length value. Previously this would segfault.
1168 HS/02 Support Avast multiline protoocol, this allows passing flags to
1169 newer versions of the scanner.
1171 JH/28 Ensure that variables possibly set during message acceptance are marked
1172 dead before release of memory in the daemon loop. This stops complaints
1173 about them when the debug_store option is enabled. Discovered specifically
1174 for sender_rate_period, but applies to a whole set of variables.
1175 Do the same for the queue-runner and queue-list loops, for variables set
1176 from spool message files. Do the same for the SMTP per-message loop, for
1177 certain variables indirectly set in ACL operations.
1179 JH/29 Bug 2250: Fix a longstanding bug in heavily-pipelined SMTP input (such
1180 as a multi-recipient message from a mailinglist manager). The coding had
1181 an arbitrary cutoff number of characters while checking for more input;
1182 enforced by writing a NUL into the buffer. This corrupted long / fast
1183 input. The problem was exposed more widely when more pipelineing of SMTP
1184 responses was introduced, and one Exim system was feeding another.
1185 The symptom is log complaints of SMTP syntax error (NUL chars) on the
1186 receiving system, and refused recipients seen by the sending system
1187 (propating to people being dropped from mailing lists).
1188 Discovered and pinpointed by David Carter.
1190 JH/30 The (EXPERIMENTAL_DMARC) variable $dmarc_ar_header is withdrawn, being
1191 replaced by the ${authresults } expansion.
1193 JH/31 Bug 2257: Fix pipe transport to not use a socket-only syscall.
1195 HS/03 Set a handler for SIGTERM and call exit(3) if running as PID 1. This
1196 allows proper process termination in container environments.
1198 JH/32 Bug 2258: Fix spool_wireformat in combination with LMTP transport.
1199 Previously the "final dot" had a newline after it; ensure it is CR,LF.
1201 JH/33 SPF: remove support for the "spf" ACL condition outcome values "err_temp"
1202 and "err_perm", deprecated since 4.83 when the RFC-defined words
1203 "temperror" and "permerror" were introduced.
1205 JH/34 Re-introduce enforcement of no cutthrough delivery on transports having
1206 transport-filters or DKIM-signing. The restriction was lost in the
1207 consolidation of verify-callout and delivery SMTP handling.
1208 Extend the restriction to also cover ARC-signing.
1210 JH/35 Cutthrough: for a final-dot response timeout (and nonunderstood responses)
1211 in defer=pass mode supply a 450 to the initiator. Previously the message
1214 PP/02 DANE: add dane_require_tls_ciphers SMTP Transport option; if unset,
1215 tls_require_ciphers is used as before.
1217 HS/03 Malware Avast: Better match the Avast multiline protocol. Add
1218 "pass_unscanned". Only tmpfails from the scanner are written to
1219 the paniclog, as they may require admin intervention (permission
1220 denied, license issues). Other scanner errors (like decompression
1221 bombs) do not cause a paniclog entry.
1223 JH/36 Fix reinitialisation of DKIM logging variable between messages.
1224 Previously it was possible to log spurious information in receive log
1227 JH/37 Bug 2255: Revert the disable of the OpenSSL session caching. This
1228 triggered odd behaviour from Outlook Express clients.
1230 PP/03 Add util/renew-opendmarc-tlds.sh script for safe renewal of public
1233 JH/38 DKIM: accept Ed25519 pubkeys in SubjectPublicKeyInfo-wrapped form,
1234 since the IETF WG has not yet settled on that versus the original
1235 "bare" representation.
1237 JH/39 Fix syslog logging for syslog_timestamp=no and log_selector +millisec.
1238 Previously the millisecond value corrupted the output.
1239 Fix also for syslog_pid=no and log_selector +pid, for which the pid
1240 corrupted the output.
1246 JH/01 Rework error string handling in TLS interface so that the caller in
1247 more cases is responsible for logging. This permits library-sourced
1248 string to be attached to addresses during delivery, and collapses
1249 pairs of long lines into single ones.
1251 PP/01 Allow PKG_CONFIG_PATH to be set in Local/Makefile and use it correctly
1252 during configuration. Wildcards are allowed and expanded.
1254 JH/02 Rework error string handling in DKIM to pass more info back to callers.
1255 This permits better logging.
1257 JH/03 Rework the transport continued-connection mechanism: when TLS is active,
1258 do not close it down and have the child transport start it up again on
1259 the passed-on TCP connection. Instead, proxy the child (and any
1260 subsequent ones) for TLS via a unix-domain socket channel. Logging is
1261 affected: the continued delivery log lines do not have any DNSSEC, TLS
1262 Certificate or OCSP information. TLS cipher information is still logged.
1264 JH/04 Shorten the log line for daemon startup by collapsing adjacent sets of
1265 identical IP addresses on different listening ports. Will also affect
1268 PP/02 Bug 2070: uClibc defines __GLIBC__ without providing glibc headers;
1269 add noisy ifdef guards to special-case this sillyness.
1270 Patch from Bernd Kuhls.
1272 JH/05 Tighten up the checking in isip4 (et al): dotted-quad components larger
1273 than 255 are no longer allowed.
1275 JH/06 Default openssl_options to include +no_ticket, to reduce load on peers.
1276 Disable the session-cache too, which might reduce our load. Since we
1277 currrectly use a new context for every connection, both as server and
1278 client, there is no benefit for these.
1279 GnuTLS appears to not support tickets server-side by default (we don't
1280 call gnutls_session_ticket_enable_server()) but client side is enabled
1281 by default on recent versions (3.1.3 +) unless the PFS priority string
1284 PP/03 Add $SOURCE_DATE_EPOCH support for reproducible builds, per spec at
1285 <https://reproducible-builds.org/specs/source-date-epoch/>.
1287 JH/07 Fix smtp transport use of limited max_rcpt under mua_wrapper. Previously
1288 the check for any unsuccessful recipients did not notice the limit, and
1289 erroneously found still-pending ones.
1291 JH/08 Pipeline CHUNKING command and data together, on kernels that support
1292 MSG_MORE. Only in-clear (not on TLS connections).
1294 JH/09 Avoid using a temporary file during transport using dkim. Unless a
1295 transport-filter is involved we can buffer the headers in memory for
1296 creating the signature, and read the spool data file once for the
1297 signature and again for transmission.
1299 JH/10 Enable use of sendfile in Linux builds as default. It was disabled in
1300 4.77 as the kernel support then wasn't solid, having issues in 64bit
1301 mode. Now, it's been long enough. Add support for FreeBSD also.
1303 JH/11 Bug 2104: Fix continued use of a transport connection with TLS. In the
1304 case where the routing stage had gathered several addresses to send to
1305 a host before calling the transport for the first, we previously failed
1306 to close down TLS in the old transport process before passing the TCP
1307 connection to the new process. The new one sent a STARTTLS command
1308 which naturally failed, giving a failed delivery and bloating the retry
1309 database. Investigation and fix prototype from Wolfgang Breyha.
1311 JH/12 Fix check on SMTP command input synchronisation. Previously there were
1312 false-negatives in the check that the sender had not preempted a response
1313 or prompt from Exim (running as a server), due to that code's lack of
1314 awareness of the SMTP input buffering.
1316 PP/04 Add commandline_checks_require_admin option.
1317 Exim drops privileges sanely, various checks such as -be aren't a
1318 security problem, as long as you trust local users with access to their
1319 own account. When invoked by services which pass untrusted data to
1320 Exim, this might be an issue. Set this option in main configuration
1321 AND make fixes to the calling application, such as using `--` to stop
1324 JH/13 Do pipelining under TLS. Previously, although safe, no advantage was
1325 taken. Now take care to pack both (client) MAIL,RCPT,DATA, and (server)
1326 responses to those, into a single TLS record each way (this usually means
1327 a single packet). As a side issue, smtp_enforce_sync now works on TLS
1330 PP/05 OpenSSL/1.1: use DH_bits() for more accurate DH param sizes. This
1331 affects you only if you're dancing at the edge of the param size limits.
1332 If you are, and this message makes sense to you, then: raise the
1333 configured limit or use OpenSSL 1.1. Nothing we can do for older
1336 JH/14 For the "sock" variant of the malware scanner interface, accept an empty
1337 cmdline element to get the documented default one. Previously it was
1340 JH/15 Fix a crash in the smtp transport caused when two hosts in succession
1341 are unsuable for non-message-specific reasons - eg. connection timeout,
1342 banner-time rejection.
1344 JH/16 Fix logging of delivery remote port, when specified by router, under
1347 PP/06 Repair manualroute's ability to take options in any order, even if one
1348 is the name of a transport.
1351 HS/01 Cleanup, prevent repeated use of -p/-oMr (CVE-2017-1000369)
1353 JH/17 Change the list-building routines interface to use the expanding-string
1354 triplet model, for better allocation and copying behaviour.
1356 JH/18 Prebuild the data-structure for "builtin" macros, for faster startup.
1357 Previously it was constructed the first time a possibly-matching string
1358 was met in the configuration file input during startup; now it is done
1361 JH/19 Bug 2141: Use the full-complex API for Berkeley DB rather than the legacy-
1362 compatible one, to avoid the (poorly documented) possibility of a config
1363 file in the working directory redirecting the DB files, possibly correpting
1364 some existing file. CVE-2017-10140 assigned for BDB.
1366 JH/20 Bug 2147: Do not defer for a verify-with-callout-and-random which is not
1367 cache-hot. Previously, although the result was properly cached, the
1368 initial verify call returned a defer.
1370 JH/21 Bug 2151: Avoid using SIZE on the MAIL for a callout verify, on any but
1371 the main verify for receipient in uncached-mode.
1373 JH/22 Retire historical build files to an "unsupported" subdir. These are
1374 defined as "ones for which we have no current evidence of testing".
1376 JH/23 DKIM: enforce the DNS pubkey record "h" permitted-hashes optional field,
1377 if present. Previously it was ignored.
1379 JH/24 Start using specified-initialisers in C structure init coding. This is
1380 a C99 feature (it's 2017, so now considered safe).
1382 JH/25 Use one-bit bitfields for flags in the "addr" data structure. Previously
1383 if was a fixed-sized field and bitmask ops via macros; it is now more
1386 PP/07 GitHub PR 56: Apply MariaDB build fix.
1387 Patch provided by Jaroslav Škarvada.
1389 PP/08 Bug 2161: Fix regression in sieve quoted-printable handling introduced
1390 during Coverity cleanups [4.87 JH/47]
1391 Diagnosis and fix provided by Michael Fischer v. Mollard.
1393 JH/26 Fix DKIM bug: when the pseudoheader generated for signing was exactly
1394 the right size to place the terminating semicolon on its own folded
1395 line, the header hash was calculated to an incorrect value thanks to
1396 the (relaxed) space the fold became.
1398 HS/02 Fix Bug 2130: large writes from the transport subprocess were chunked
1399 and confused the parent.
1401 JH/27 Fix SOCKS bug: an unitialized pointer was deref'd by the transport process
1402 which could crash as a result. This could lead to undeliverable messages.
1404 JH/28 Logging: "next input sent too soon" now shows where input was truncated
1407 JH/29 Fix queue_run_in_order to ignore the PID portion of the message ID. This
1408 matters on fast-turnover and PID-randomising systems, which were getting
1409 out-of-order delivery.
1411 JH/30 Fix a logging bug on aarch64: an unsafe routine was previously used for
1412 a possibly-overlapping copy. The symptom was that "Remote host closed
1413 connection in response to HELO" was logged instead of the actual 4xx
1416 JH/31 Fix CHUNKING code to properly flush the unwanted chunk after an error.
1417 Previously only that bufferd was discarded, resulting in SYMTP command
1420 JH/32 DKIM: when a message has multiple signatures matching an identity given
1421 in dkim_verify_signers, run the dkim acl once for each. Previously only
1422 one run was done. Bug 2189.
1424 JH/33 Downgrade an unfound-list name (usually a typo in the config file) from
1425 "panic the current process" to "deliberately defer". The panic log is
1426 still written with the problem list name; the mail and reject logs now
1427 get a temp-reject line for the message that was being handled, saying
1428 something like "domains check lookup or other defer". The SMTP 451
1429 message is still "Temporary local problem".
1431 JH/34 Bug 2199: Fix a use-after-free while reading smtp input for header lines.
1432 A crafted sequence of BDAT commands could result in in-use memory beeing
1433 freed. CVE-2017-16943.
1435 HS/03 Bug 2201: Fix checking for leading-dot on a line during headers reading
1436 from SMTP input. Previously it was always done; now only done for DATA
1437 and not BDAT commands. CVE-2017-16944.
1439 JH/35 Bug 2201: Flush received data in BDAT mode after detecting an error fatal
1440 to the message (such as an overlong header line). Previously this was
1441 not done and we did not exit BDAT mode. Followon from the previous item
1442 though a different problem.
1448 JH/01 Bug 1922: Support IDNA2008. This has slightly different conversion rules
1449 than -2003 did; needs libidn2 in addition to libidn.
1451 JH/02 The path option on a pipe transport is now expanded before use.
1453 PP/01 GitHub PR 50: Do not call ldap_start_tls_s on ldapi:// connections.
1454 Patch provided by "Björn", documentation fix added too.
1456 JH/03 Bug 2003: fix Proxy Protocol v2 handling: the address size field was
1457 missing a wire-to-host endian conversion.
1459 JH/04 Bug 2004: fix CHUNKING in non-PIPELINEING mode. Chunk data following
1460 close after a BDAT command line could be taken as a following command,
1461 giving a synch failure. Fix by only checking for synch immediately
1462 before acknowledging the chunk.
1464 PP/02 GitHub PR 52: many spelling fixes, which include fixing parsing of
1465 no_require_dnssec option and creation of _HAVE_TRANSPORT_APPEND_MAILDIR
1466 macro. Patches provided by Josh Soref.
1468 JH/05 Have the EHLO response advertise VRFY, if there is a vrfy ACL defined.
1469 Previously we did not; the RFC seems ambiguous and VRFY is not listed
1470 by IANA as a service extension. However, John Klensin suggests that we
1473 JH/06 Bug 2017: Fix DKIM verification in -bh test mode. The data feed into
1474 the dkim code may be unix-mode line endings rather than smtp wire-format
1475 CRLF, so prepend a CR to any bare LF.
1477 JH/07 Rationalise the coding for callout smtp conversations and transport ones.
1478 As a side-benfit, callouts can now use PIPELINING hence fewer round-trips.
1480 JH/08 Bug 2016: Fix DKIM verification vs. CHUNKING. Any BDAT commands after
1481 the first were themselves being wrongly included in the feed into dkim
1482 processing; with most chunk sizes in use this resulted in an incorrect
1483 body hash calculated value.
1485 JH/09 Bug 2014: permit inclusion of a DKIM-Signature header in a received
1486 DKIM signature block, for verification. Although advised against by
1487 standards it is specifically not ruled illegal.
1489 JH/10 Bug 2025: Fix reception of (quoted) local-parts with embedded spaces.
1491 JH/11 Bug 2029: Fix crash in DKIM verification when a message signature block is
1492 missing a body hash (the bh= tag).
1494 JH/12 Bug 2018: Re-order Proxy Protocol startup versus TLS-on-connect startup.
1495 It seems that HAProxy sends the Proxy Protocol information in clear and
1496 only then does a TLS startup, so do the same.
1498 JH/13 Bug 2027: Avoid attempting to use TCP Fast Open for non-transport client
1499 TCP connections (such as for Spamd) unless the daemon successfully set
1500 Fast Open mode on its listening sockets. This fixes breakage seen on
1501 too-old kernels or those not configured for Fast Open, at the cost of
1502 requiring both directions being enabled for TFO, and TFO never being used
1503 by non-daemon-related Exim processes.
1505 JH/14 Bug 2000: Reject messages recieved with CHUNKING but with malformed line
1506 endings, at least on the first header line. Try to canonify any that get
1507 past that check, despite the cost.
1509 JH/15 Angle-bracket nesting (an error inserted by broken sendmails) levels are
1510 now limited to an arbitrary five deep, while parsing addresses with the
1511 strip_excess_angle_brackets option enabled.
1513 PP/03 Bug 2018: For Proxy Protocol and TLS-on-connect, do not over-read and
1514 instead leave the unprompted TLS handshake in socket buffer for the
1515 TLS library to consume.
1517 PP/04 Bug 2018: Also handle Proxy Protocol v2 safely.
1519 PP/05 FreeBSD compat: handle that Ports no longer create /usr/bin/perl
1521 JH/16 Drop variables when they go out of scope. Memory management drops a whole
1522 region in one operation, for speed, and this leaves assigned pointers
1523 dangling. Add checks run only under the testsuite which checks all
1524 variables at a store-reset and panics on a dangling pointer; add code
1525 explicitly nulling out all the variables discovered. Fixes one known
1526 bug: a transport crash, where a dangling pointer for $sending_ip_address
1527 originally assigned in a verify callout, is re-used.
1529 PP/06 Drop '.' from @INC in various Perl scripts.
1531 PP/07 Switch FreeBSD iconv to always use the base-system libc functions.
1533 PP/08 Reduce a number of compilation warnings under clang; building with
1534 CC=clang CFLAGS+=-Wno-dangling-else -Wno-logical-op-parentheses
1535 should be warning-free.
1537 JH/17 Fix inbound CHUNKING when DKIM disabled at runtime.
1539 HS/01 Fix portability problems introduced by PP/08 for platforms where
1540 realloc(NULL) is not equivalent to malloc() [SunOS et al].
1542 HS/02 Bug 1974: Fix missing line terminator on the last received BDAT
1543 chunk. This allows us to accept broken chunked messages. We need a more
1544 general solution here.
1546 PP/09 Wrote util/chunking_fixqueue_finalnewlines.pl to help recover
1547 already-broken messages in the queue.
1549 JH/18 Bug 2061: Fix ${extract } corrupting an enclosing ${reduce } $value.
1551 JH/19 Fix reference counting bug in routing-generated-address tracking.
1557 JH/01 Use SIZE on MAIL FROM in a cutthrough connection, if the destination
1558 supports it and a size is available (ie. the sending peer gave us one).
1560 JH/02 The obsolete acl condition "demime" is removed (finally, after ten
1561 years of being deprecated). The replacements are the ACLs
1562 acl_smtp_mime and acl_not_smtp_mime.
1564 JH/03 Upgrade security requirements imposed for hosts_try_dane: previously
1565 a downgraded non-dane trust-anchor for the TLS connection (CA-style)
1566 or even an in-clear connection were permitted. Now, if the host lookup
1567 was dnssec and dane was requested then the host is only used if the
1568 TLSA lookup succeeds and is dnssec. Further hosts (eg. lower priority
1569 MXs) will be tried (for hosts_try_dane though not for hosts_require_dane)
1570 if one fails this test.
1571 This means that a poorly-configured remote DNS will make it incommunicado;
1572 but it protects against a DNS-interception attack on it.
1574 JH/04 Bug 1810: make continued-use of an open smtp transport connection
1575 non-noisy when a race steals the message being considered.
1577 JH/05 If main configuration option tls_certificate is unset, generate a
1578 self-signed certificate for inbound TLS connections.
1580 JH/06 Bug 165: hide more cases of password exposure - this time in expansions
1581 in rewrites and routers.
1583 JH/07 Retire gnutls_require_mac et.al. These were nonfunctional since 4.80
1584 and logged a warning sing 4.83; now they are a configuration file error.
1586 JH/08 Bug 1836: Fix crash in VRFY handling when handed an unqualified name
1587 (lacking @domain). Apply the same qualification processing as RCPT.
1589 JH/09 Bug 1804: Avoid writing msglog files when in -bh or -bhc mode.
1591 JH/10 Support ${sha256:} applied to a string (as well as the previous
1594 JH/11 Cutthrough: avoid using the callout hints db on a verify callout when
1595 a cutthrough deliver is pending, as we always want to make a connection.
1596 This also avoids re-routing the message when later placing the cutthrough
1597 connection after a verify cache hit.
1598 Do not update it with the verify result either.
1600 JH/12 Cutthrough: disable when verify option success_on_redirect is used, and
1601 when routing results in more than one destination address.
1603 JH/13 Cutthrough: expand transport dkim_domain option when testing for dkim
1604 signing (which inhibits the cutthrough capability). Previously only
1605 the presence of an option was tested; now an expansion evaluating as
1606 empty is permissible (obviously it should depend only on data available
1607 when the cutthrough connection is made).
1609 JH/14 Fix logging of errors under PIPELINING. Previously the log line giving
1610 the relevant preceding SMTP command did not note the pipelining mode.
1612 JH/15 Fix counting of empty lines in $body_linecount and $message_linecount.
1613 Previously they were not counted.
1615 JH/16 DANE: treat a TLSA lookup response having all non-TLSA RRs, the same
1616 as one having no matching records. Previously we deferred the message
1617 that needed the lookup.
1619 JH/17 Fakereject: previously logged as a normal message arrival "<="; now
1620 distinguished as "(=".
1622 JH/18 Bug 1867: make the fail_defer_domains option on a dnslookup router work
1623 for missing MX records. Previously it only worked for missing A records.
1625 JH/19 Bug 1850: support Radius libraries that return REJECT_RC.
1627 JH/20 Bug 1872: Ensure that acl_smtp_notquit is run when the connection drops
1628 after the data-go-ahead and data-ack. Patch from Jason Betts.
1630 JH/21 Bug 1846: Send DMARC forensic reports for reject and quarantine results,
1631 even for a "none" policy. Patch from Tony Meyer.
1633 JH/22 Fix continued use of a connection for further deliveries. If a port was
1634 specified by a router, it must also match for the delivery to be
1637 JH/23 Bug 1874: fix continued use of a connection for further deliveries.
1638 When one of the recipients of a message was unsuitable for the connection
1639 (has no matching addresses), we lost track of needing to mark it
1640 deferred. As a result mail would be lost.
1642 JH/24 Bug 1832: Log EHLO response on getting conn-close response for HELO.
1644 JH/25 Decoding ACL controls is now done using a binary search; the source code
1645 takes up less space and should be simpler to maintain. Merge the ACL
1646 condition decode tables also, with similar effect.
1648 JH/26 Fix problem with one_time used on a redirect router which returned the
1649 parent address unchanged. A retry would see the parent address marked as
1650 delivered, so not attempt the (identical) child. As a result mail would
1653 JH/27 Fix a possible security hole, wherein a process operating with the Exim
1654 UID can gain a root shell. Credit to http://www.halfdog.net/ for
1655 discovery and writeup. Ubuntu bug 1580454; no bug raised against Exim
1658 JH/28 Enable {spool,log} filesystem space and inode checks as default.
1659 Main config options check_{log,spool}_{inodes,space} are now
1660 100 inodes, 10MB unless set otherwise in the configuration.
1662 JH/29 Fix the connection_reject log selector to apply to the connect ACL.
1663 Previously it only applied to the main-section connection policy
1666 JH/30 Bug 1897: fix callouts connection fallback from TLS to cleartext.
1668 PP/01 Changed default Diffie-Hellman parameters to be Exim-specific, created
1669 by me. Added RFC7919 DH primes as an alternative.
1671 PP/02 Unbreak build via pkg-config with new hash support when crypto headers
1672 are not in the system include path.
1674 JH/31 Fix longstanding bug with aborted TLS server connection handling. Under
1675 GnuTLS, when a session startup failed (eg because the client disconnected)
1676 Exim did stdio operations after fclose. This was exposed by a recent
1677 change which nulled out the file handle after the fclose.
1679 JH/32 Bug 1909: Fix OCSP proof verification for cases where the proof is
1680 signed directly by the cert-signing cert, rather than an intermediate
1681 OCSP-signing cert. This is the model used by LetsEncrypt.
1683 JH/33 Bug 1914: Ensure socket is nonblocking before draining after SMTP QUIT.
1685 HS/01 Fix leak in verify callout under GnuTLS, about 3MB per recipient on
1686 an incoming connection.
1688 HS/02 Bug 1802: Do not half-close the connection after sending a request
1691 HS/03 Use "auto" as the default EC curve parameter. For OpenSSL < 1.0.2
1692 fallback to "prime256v1".
1694 JH/34 SECURITY: Use proper copy of DATA command in error message.
1695 Could leak key material. Remotely exploitable. CVE-2016-9963.
1701 JH/01 Bug 1664: Disable OCSP for GnuTLS library versions at/before 3.3.16
1702 and 3.4.4 - once the server is enabled to respond to an OCSP request
1703 it does even when not requested, resulting in a stapling non-aware
1704 client dropping the TLS connection.
1706 TF/01 Code cleanup: Overhaul the debug_selector and log_selector machinery to
1707 support variable-length bit vectors. No functional change.
1709 TF/02 Improve the consistency of logging incoming and outgoing interfaces.
1710 The I= interface field on outgoing lines is now after the H= remote
1711 host field, same as incoming lines. There is a separate
1712 outgoing_interface log selector which allows you to disable the
1715 JH/02 Bug 728: Close logfiles after a daemon-process "exceptional" log write.
1716 If not running log_selector +smtp_connection the mainlog would be held
1717 open indefinitely after a "too many connections" event, including to a
1718 deleted file after a log rotate. Leave the per net connection logging
1719 leaving it open for efficiency as that will be quickly detected by the
1720 check on the next write.
1722 HS/01 Bug 1671: Fix post transport crash.
1723 Processing the wait-<transport> messages could crash the delivery
1724 process if the message IDs didn't exist for some reason. When
1725 using 'split_spool_directory=yes' the construction of the spool
1726 file name failed already, exposing the same netto behaviour.
1728 JH/03 Bug 425: Capture substrings in $regex1, $regex2 etc from regex &
1729 mime_regex ACL conditions.
1731 JH/04 Bug 1686: When compiled with EXPERIMENTAL_DSN_INFO: Add extra information
1732 to DSN fail messages (bounces): remote IP, remote greeting, remote response
1733 to HELO, local diagnostic string.
1735 JH/05 Downgrade message for a TLS-certificate-based authentication fail from
1736 log line to debug. Even when configured with a tls authenticator many
1737 client connections are expected to not authenticate in this way, so
1738 an authenticate fail is not an error.
1740 HS/02 Add the Exim version string to the process info. This way exiwhat
1741 gives some more detail about the running daemon.
1743 JH/06 Bug 1395: time-limit caching of DNS lookups, to the TTL value. This may
1744 matter for fast-change records such as DNSBLs.
1746 JH/07 Bug 1678: Always record an interface option value, if set, as part of a
1747 retry record, even if constant. There may be multiple transports with
1748 different interface settings and the retry behaviour needs to be kept
1751 JH/08 Bug 1586: exiqgrep now refuses to run if there are unexpected arguments.
1753 JH/09 Bug 1700: ignore space & tab embedded in base64 during decode.
1755 JH/10 Bug 840: fix log_defer_output option of pipe transport
1757 JH/11 Bug 830: use same host for all RCPTS of a message, even under
1758 hosts_randomize. This matters a lot when combined with mua_wrapper.
1760 JH/12 Bug 1706: percent and underbar characters are no longer escaped by the
1761 ${quote_pgsql:<string>} operator.
1763 JH/13 Bug 1708: avoid misaligned access in cached lookup.
1765 JH/14 Change header file name for freeradius-client. Relevant if compiling
1766 with Radius support; from the Gentoo tree and checked under Fedora.
1768 JH/15 Bug 1712: Introduce $prdr_requested flag variable
1770 JH/16 Bug 1714: Permit an empty string as expansion result for transport
1771 option transport_filter, meaning no filtering.
1773 JH/17 Bug 1713: Fix non-PDKIM_DEBUG build. Patch from Jasen Betts.
1775 JH/18 Bug 1709: When built with TLS support, the tls_advertise_hosts option now
1776 defaults to "*" (all hosts). The variable is now available when not built
1777 with TLS, default unset, mainly to enable keeping the testsuite sane.
1778 If a server certificate is not supplied (via tls_certificate) an error is
1779 logged, and clients will find TLS connections fail on startup. Presumably
1780 they will retry in-clear.
1781 Packagers of Exim are strongly encouraged to create a server certificate
1782 at installation time.
1784 HS/03 Add -bP config_file as a synonym for -bP configure_file, for consistency
1785 with the $config_file variable.
1787 JH/19 Two additional event types: msg:rcpt:defer and msg:rcpt:host:defer. Both
1788 in transport context, after the attempt, and per-recipient. The latter type
1789 is per host attempted. The event data is the error message, and the errno
1790 information encodes the lookup type (A vs. MX) used for the (first) host,
1791 and the trailing two digits of the smtp 4xx response.
1793 GF/01 Bug 1715: Fix for race condition in exicyclog, where exim could attempt
1794 to write to mainlog (or rejectlog, paniclog) in the window between file
1795 creation and permissions/ownership being changed. Particularly affects
1796 installations where exicyclog is run as root, rather than exim user;
1797 result is that the running daemon panics and dies.
1799 JH/20 Bug 1701: For MySQL lookups, support MySQL config file option group names.
1801 JH/21 Bug 1720: Add support for priority groups and weighted-random proxy
1802 selection for the EXPERIMENTAL_SOCKS feature, via new per-proxy options
1803 "pri" and "weight". Note that the previous implicit priority given by the
1804 list order is no longer honoured.
1806 JH/22 Bugs 963, 1721: Fix some corner cases in message body canonicalization
1807 for DKIM processing.
1809 JH/23 Move SOCKS5 support from Experimental to mainline, enabled for a build
1810 by defining SUPPORT_SOCKS.
1812 JH/26 Move PROXY support from Experimental to mainline, enabled for a build
1813 by defining SUPPORT_PROXY. Note that the proxy_required_hosts option
1814 is renamed to hosts_proxy, and the proxy_{host,target}_{address,port}.
1815 variables are renamed to proxy_{local,external}_{address,port}.
1817 JH/27 Move Internationalisation support from Experimental to mainline, enabled
1818 for a build by defining SUPPORT_I18N
1820 JH/28 Bug 1745: Fix redis lookups to handle (quoted) spaces embedded in parts
1821 of the query string, and make ${quote_redis:} do that quoting.
1823 JH/29 Move Events support from Experimental to mainline, enabled by default
1824 and removable for a build by defining DISABLE_EVENT.
1826 JH/30 Updated DANE implementation code to current from Viktor Dukhovni.
1828 JH/31 Fix bug with hosts_connection_nolog and named-lists which were wrongly
1829 cached by the daemon.
1831 JH/32 Move Redis support from Experimental to mainline, enabled for a build
1832 by defining LOOKUP_REDIS. The libhiredis library is required.
1834 JH/33 Bug 1748: Permit ACL dnslists= condition in non-smtp ACLs if explicit
1835 keys are given for lookup.
1837 JH/34 Bug 1192: replace the embedded copy of PolarSSL RSA routines in the DKIM
1838 support, by using OpenSSL or GnuTLS library ones. This means DKIM is
1839 only supported when built with TLS support. The PolarSSL SHA routines
1840 are still used when the TLS library is too old for convenient support.
1842 JH/35 Require SINGLE_DH_USE by default in OpenSSL (main config option
1843 openssl_options), for security. OpenSSL forces this from version 1.1.0
1844 server-side so match that on older versions.
1846 JH/36 Bug 1778: longstanding bug in memory use by the ${run } expansion: A fresh
1847 allocation for $value could be released as the expansion processing
1848 concluded, but leaving the global pointer active for it.
1850 JH/37 Bug 1769: Permit a VRFY ACL to override the default 252 response,
1851 and to use the domains and local_parts ACL conditions.
1853 JH/38 Fix cutthrough bug with body lines having a single dot. The dot was
1854 incorrectly not doubled on cutthrough transmission, hence seen as a
1855 body-termination at the receiving system - resulting in truncated mails.
1856 Commonly the sender saw a TCP-level error, and retransmitted the message
1857 via the normal store-and-forward channel. This could result in duplicates
1858 received - but deduplicating mailstores were liable to retain only the
1859 initial truncated version.
1861 JH/39 Bug 1781: Fix use of DKIM private-keys having trailing '=' in the base-64.
1863 JH/40 Fix crash in queryprogram router when compiled with EXPERIMENTAL_SRS.
1865 JH/41 Bug 1792: Fix selection of headers to sign for DKIM: bottom-up. While
1866 we're in there, support oversigning also; bug 1309.
1868 JH/42 Bug 1796: Fix error logged on a malware scanner connection failure.
1870 HS/04 Add support for keep_environment and add_environment options.
1872 JH/43 Tidy coding issues detected by gcc --fsanitize=undefined. Some remain;
1873 either intentional arithmetic overflow during PRNG, or testing config-
1876 JH/44 Bug 1800: The combination of a -bhc commandline option and cutthrough
1877 delivery resulted in actual delivery. Cancel cutthrough before DATA
1880 JH/45 Fix cutthrough, when connection not opened by verify and target hard-
1881 rejects a recipient: pass the reject to the originator.
1883 JH/46 Multiple issues raised by Coverity. Some were obvious or plausible bugs.
1884 Many were false-positives and ignorable, but it's worth fixing the
1887 JH/47 Fix build on HP-UX and older Solaris, which need (un)setenv now also
1888 for the new environment-manipulation done at startup. Move the routines
1889 from being local to tls.c to being global via the os.c file.
1891 JH/48 Bug 1807: Fix ${extract } for the numeric/3-string case. While preparsing
1892 an extract embedded as result-arg for a map, the first arg for extract
1893 is unavailable so we cannot tell if this is a numbered or keyed
1894 extraction. Accept either.
1900 JH/01 Bug 1545: The smtp transport option "retry_include_ip_address" is now
1903 JH/02 The smtp transport option "multi_domain" is now expanded.
1905 JH/03 The smtp transport now requests PRDR by default, if the server offers
1908 JH/04 Certificate name checking on server certificates, when exim is a client,
1909 is now done by default. The transport option tls_verify_cert_hostnames
1910 can be used to disable this per-host. The build option
1911 EXPERIMENTAL_CERTNAMES is withdrawn.
1913 JH/05 The value of the tls_verify_certificates smtp transport and main options
1914 default to the word "system" to access the system default CA bundle.
1915 For GnuTLS, only version 3.0.20 or later.
1917 JH/06 Verification of the server certificate for a TLS connection is now tried
1918 (but not required) by default. The verification status is now logged by
1919 default, for both outbound TLS and client-certificate supplying inbound
1922 JH/07 Changed the default rfc1413 lookup settings to disable calls. Few
1925 JH/08 The EXPERIMENTAL_DSN compile option is no longer needed; all Delivery
1926 Status Notification (bounce) messages are now MIME format per RFC 3464.
1927 Support for RFC 3461 DSN options NOTIFY,ENVID,RET,ORCPT can be advertised
1928 under the control of the dsn_advertise_hosts option, and routers may
1929 have a dsn_lasthop option.
1931 JH/09 A timeout of 2 minutes is now applied to all malware scanner types by
1932 default, modifiable by a malware= option. The list separator for
1933 the options can now be changed in the usual way. Bug 68.
1935 JH/10 The smtp_receive_timeout main option is now expanded before use.
1937 JH/11 The incoming_interface log option now also enables logging of the
1938 local interface on delivery outgoing connections.
1940 JH/12 The cutthrough-routing facility now supports multi-recipient mails,
1941 if the interface and destination host and port all match.
1943 JH/13 Bug 344: The verify = reverse_host_lookup ACL condition now accepts a
1946 JH/14 Bug 1573: The spam= ACL condition now additionally supports Rspamd.
1947 Patch from Andrew Lewis.
1949 JH/15 Bug 670: The spamd_address main option (for the spam= ACL condition)
1950 now supports optional time-restrictions, weighting, and priority
1951 modifiers per server. Patch originally by <rommer@active.by>.
1953 JH/16 The spamd_address main option now supports a mixed list of local
1954 and remote servers. Remote servers can be IPv6 addresses, and
1955 specify a port-range.
1957 JH/17 Bug 68: The spamd_address main option now supports an optional
1958 timeout value per server.
1960 JH/18 Bug 1581: Router and transport options headers_add/remove can
1961 now have the list separator specified.
1963 JH/19 Bug 392: spamd_address, and clamd av_scanner, now support retry
1966 JH/20 Bug 1571: Ensure that $tls_in_peerdn is set, when verification fails
1969 JH/21 Support for the A6 type of dns record is withdrawn.
1971 JH/22 Bug 608: The result of a QUIT or not-QUIT toplevel ACL now matters
1972 rather than the verbs used.
1974 JH/23 Bug 1572: Increase limit on SMTP confirmation message copy size
1975 from 255 to 1024 chars.
1977 JH/24 Verification callouts now attempt to use TLS by default.
1979 HS/01 DNSSEC options (dnssec_require_domains, dnssec_request_domains)
1980 are generic router options now. The defaults didn't change.
1982 JH/25 Bug 466: Add RFC2322 support for MIME attachment filenames.
1983 Original patch from Alexander Shikoff, worked over by JH.
1985 HS/02 Bug 1575: exigrep falls back to autodetection of compressed
1986 files if ZCAT_COMMAND is not executable.
1988 JH/26 Bug 1539: Add timeout/retry options on dnsdb lookups.
1990 JH/27 Bug 286: Support SOA lookup in dnsdb lookups.
1992 JH/28 Bug 1588: Do not use the A lookup following an AAAA for setting the FQDN.
1993 Normally benign, it bites when the pair was led to by a CNAME;
1994 modern usage is to not canonicalize the domain to a CNAME target
1995 (and we were inconsistent anyway for A-only vs AAAA+A).
1997 JH/29 Bug 1632: Removed the word "rejected" from line logged for ACL discards.
1999 JH/30 Check the forward DNS lookup for DNSSEC, in addition to the reverse,
2000 when evaluating $sender_host_dnssec.
2002 JH/31 Check the HELO verification lookup for DNSSEC, adding new
2003 $sender_helo_dnssec variable.
2005 JH/32 Bug 1397: Enable ECDHE on OpenSSL, just the NIST P-256 curve.
2007 JH/33 Bug 1346: Note MAIL cmd seen in -bS batch, to avoid smtp_no_mail log.
2009 JH/34 Bug 1648: Fix a memory leak seen with "mailq" and large queues.
2011 JH/35 Bug 1642: Fix support of $spam_ variables at delivery time. Was
2012 documented as working, but never had. Support all but $spam_report.
2014 JH/36 Bug 1659: Guard checking of input smtp commands again pseudo-command
2015 added for tls authenticator.
2017 HS/03 Add perl_taintmode main config option
2023 TL/01 When running the test suite, the README says that variables such as
2024 no_msglog_check are global and can be placed anywhere in a specific
2025 test's script, however it was observed that placement needed to be near
2026 the beginning for it to behave that way. Changed the runtest perl
2027 script to read through the entire script once to detect and set these
2028 variables, reset to the beginning of the script, and then run through
2029 the script parsing/test process like normal.
2031 TL/02 The BSD's have an arc4random API. One of the functions to induce
2032 adding randomness was arc4random_stir(), but it has been removed in
2033 OpenBSD 5.5. Detect this OpenBSD version and skip calling this
2034 function when detected.
2036 JH/01 Expand the EXPERIMENTAL_TPDA feature. Several different events now
2037 cause callback expansion.
2039 TL/03 Bugzilla 1518: Clarify "condition" processing in routers; that
2040 syntax errors in an expansion can be treated as a string instead of
2041 logging or causing an error, due to the internal use of bool_lax
2042 instead of bool when processing it.
2044 JH/02 Add EXPERIMENTAL_DANE, allowing for using the DNS as trust-anchor for
2045 server certificates when making smtp deliveries.
2047 JH/03 Support secondary-separator specifier for MX, SRV, TLSA lookups.
2049 JH/04 Add ${sort {list}{condition}{extractor}} expansion item.
2051 TL/04 Bugzilla 1216: Add -M (related messages) option to exigrep.
2053 TL/05 GitHub Issue 18: Adjust logic testing for true/false in redis lookups.
2054 Merged patch from Sebastian Wiedenroth.
2056 JH/05 Fix results-pipe from transport process. Several recipients, combined
2057 with certificate use, exposed issues where response data items split
2058 over buffer boundaries were not parsed properly. This eventually
2059 resulted in duplicates being sent. This issue only became common enough
2060 to notice due to the introduction of connection certificate information,
2061 the item size being so much larger. Found and fixed by Wolfgang Breyha.
2063 JH/06 Bug 1533: Fix truncation of items in headers_remove lists. A fixed
2064 size buffer was used, resulting in syntax errors when an expansion
2067 JH/07 Add support for directories of certificates when compiled with a GnuTLS
2068 version 3.3.6 or later.
2070 JH/08 Rename the TPDA experimental facility to Event Actions. The #ifdef
2071 is EXPERIMENTAL_EVENT, the main-configuration and transport options
2072 both become "event_action", the variables become $event_name, $event_data
2073 and $event_defer_errno. There is a new variable $verify_mode, usable in
2074 routers, transports and related events. The tls:cert event is now also
2075 raised for inbound connections, if the main configuration event_action
2078 TL/06 In test suite, disable OCSP for old versions of openssl which contained
2079 early OCSP support, but no stapling (appears to be less than 1.0.0).
2081 JH/09 When compiled with OpenSSL and EXPERIMENTAL_CERTNAMES, the checks on
2082 server certificate names available under the smtp transport option
2083 "tls_verify_cert_hostname" now do not permit multi-component wildcard
2086 JH/10 Time-related extraction expansions from certificates now use the main
2087 option "timezone" setting for output formatting, and are consistent
2088 between OpenSSL and GnuTLS compilations. Bug 1541.
2090 JH/11 Fix a crash in mime ACL when meeting a zero-length, quoted or RFC2047-
2091 encoded parameter in the incoming message. Bug 1558.
2093 JH/12 Bug 1527: Autogrow buffer used in reading spool files. Since they now
2094 include certificate info, eximon was claiming there were spoolfile
2097 JH/13 Bug 1521: Fix ldap lookup for single-attr request, multiple-attr return.
2099 JH/14 Log delivery-related information more consistently, using the sequence
2100 "H=<name> [<ip>]" wherever possible.
2102 TL/07 Bug 1547: Omit RFCs from release. Draft and RFCs have licenses which
2103 are problematic for Debian distribution, omit them from the release
2106 JH/15 Updates and fixes to the EXPERIMENTAL_DSN feature.
2108 JH/16 Fix string representation of time values on 64bit time_t architectures.
2111 JH/17 Fix a null-indirection in certextract expansions when a nondefault
2112 output list separator was used.
2117 TL/01 Bugzilla 1506: Re-add a 'return NULL' to silence complaints from static
2118 checkers that were complaining about end of non-void function with no
2121 JH/01 Bug 1513: Fix parsing of quoted parameter values in MIME headers.
2122 This was a regression introduced in 4.83 by another bugfix.
2124 JH/02 Fix broken compilation when EXPERIMENTAL_DSN is enabled.
2126 TL/02 Bug 1509: Fix exipick for enhanced spoolfile specification used when
2127 EXPERIMENTAL_DSN is enabled. Fix from Wolfgang Breyha.
2133 TF/01 Correctly close the server side of TLS when forking for delivery.
2135 When a message was received over SMTP with TLS, Exim failed to clear up
2136 the incoming connection properly after forking off the child process to
2137 deliver the message. In some situations the subsequent outgoing
2138 delivery connection happened to have the same fd number as the incoming
2139 connection previously had. Exim would try to use TLS and fail, logging
2140 a "Bad file descriptor" error.
2142 TF/02 Portability fix for building lookup modules on Solaris when the xpg4
2143 utilities have not been installed.
2145 JH/01 Fix memory-handling in use of acl as a conditional; avoid free of
2146 temporary space as the ACL may create new global variables.
2148 TL/01 LDAP support uses per connection or global context settings, depending
2149 upon the detected version of the libraries at build time.
2151 TL/02 Experimental Proxy Protocol support: allows a proxied SMTP connection
2152 to extract and use the src ip:port in logging and expansions as if it
2153 were a direct connection from the outside internet. PPv2 support was
2154 updated based on HAProxy spec change in May 2014.
2156 JH/02 Add ${listextract {number}{list}{success}{fail}}.
2158 TL/03 Bugzilla 1433: Fix DMARC SEGV with specific From header contents.
2159 Properly escape header and check for NULL return.
2161 PP/01 Continue incomplete 4.82 PP/19 by fixing docs too: use dns_dnssec_ok
2164 JH/03 Bugzilla 1157: support log_selector smtp_confirmation for lmtp.
2166 TL/04 Add verify = header_names_ascii check to reject email with non-ASCII
2167 characters in header names, implemented as a verify condition.
2168 Contributed by Michael Fischer v. Mollard.
2170 TL/05 Rename SPF condition results err_perm and err_temp to standardized
2171 results permerror and temperror. Previous values are deprecated but
2172 still accepted. In a future release, err_perm and err_temp will be
2173 completely removed, which will be a backward incompatibility if the
2174 ACL tests for either of these two old results. Patch contributed by
2175 user bes-internal on the mailing list.
2177 JH/04 Add ${utf8clean:} operator. Contributed by Alex Rau.
2179 JH/05 Bugzilla 305: Log incoming-TLS details on rejects, subject to log
2180 selectors, in both main and reject logs.
2182 JH/06 Log outbound-TLS and port details, subject to log selectors, for a
2185 JH/07 Add malware type "sock" for talking to simple daemon.
2187 JH/08 Bugzilla 1371: Add tls_{,try_}verify_hosts to smtp transport.
2189 JH/09 Bugzilla 1431: Support (with limitations) headers_add/headers_remove in
2190 routers/transports under cutthrough routing.
2192 JH/10 Bugzilla 1005: ACL "condition =" should accept values which are negative
2193 numbers. Touch up "bool" conditional to keep the same definition.
2195 TL/06 Remove duplicated language in spec file from 4.82 TL/16.
2197 JH/11 Add dnsdb tlsa lookup. From Todd Lyons.
2199 JH/12 Expand items in router/transport headers_add or headers_remove lists
2200 individually rather than the list as a whole. Bug 1452.
2202 Required for reasonable handling of multiple headers_ options when
2203 they may be empty; requires that headers_remove items with embedded
2204 colons must have them doubled (or the list-separator changed).
2206 TL/07 Add new dmarc expansion variable $dmarc_domain_policy to directly
2207 view the policy declared in the DMARC record. Currently, $dmarc_status
2208 is a combined value of both the record presence and the result of the
2211 JH/13 Fix handling of $tls_cipher et.al. in (non-verify) transport. Bug 1455.
2213 JH/14 New options dnssec_request_domains, dnssec_require_domains on the
2214 dnslookup router and the smtp transport (applying to the forward
2217 TL/08 Bugzilla 1453: New LDAP "SERVERS=" option allows admin to override list
2218 of ldap servers used for a specific lookup. Patch provided by Heiko
2221 JH/18 New options dnssec_lax, dnssec_strict on dnsdb lookups.
2222 New variable $lookup_dnssec_authenticated for observability.
2224 TL/09 Bugzilla 609: Add -C option to exiqgrep, specify which exim.conf to use.
2225 Patch submitted by Lars Timman.
2227 JH/19 EXPERIMENTAL_OCSP support under GnuTLS. Bug 1459.
2229 TL/10 Bugzilla 1454: New -oMm option to pass message reference to Exim.
2230 Requires trusted mode and valid format message id, aborts otherwise.
2231 Patch contributed by Heiko Schlichting.
2233 JH/20 New expansion variables tls_(in,out)_(our,peer)cert, and expansion item
2234 certextract with support for various fields. Bug 1358.
2236 JH/21 Observability of OCSP via variables tls_(in,out)_ocsp. Stapling
2237 is requested by default, modifiable by smtp transport option
2240 JH/22 Expansion operators ${md5:string} and ${sha1:string} can now
2241 operate on certificate variables to give certificate fingerprints
2242 Also new ${sha256:cert_variable}.
2244 JH/23 The PRDR feature is moved from being Experimental into the mainline.
2246 TL/11 Bug 1119: fix memory allocation in string_printing2(). Patch from
2247 Christian Aistleitner.
2249 JH/24 The OCSP stapling feature is moved from Experimental into the mainline.
2251 TL/12 Bug 1444: Fix improper \r\n sequence handling when writing spool
2252 file. Patch from Wolfgang Breyha.
2254 JH/25 Expand the coverage of the delivery $host and $host_address to
2255 client authenticators run in verify callout. Bug 1476.
2257 JH/26 Port service names are now accepted for tls_on_connect_ports, to
2258 align with daemon_smtp_ports. Bug 72.
2260 TF/03 Fix udpsend. The ip_connectedsocket() function's socket type
2261 support and error reporting did not work properly.
2263 TL/13 Bug 1495: Exiqgrep check if -C config file specified on cli exists
2264 and is readable. Patch from Andrew Colin Kissa.
2266 TL/14 Enhance documentation of ${run expansion and how it parses the
2267 commandline after expansion, particularly in the case when an
2268 unquoted variable expansion results in an empty value.
2270 JH/27 The TLS SNI feature was broken in 4.82. Fix it.
2272 PP/02 Fix internal collision of T_APL on systems which support RFC3123
2273 by renaming away from it. Addresses GH issue 15, reported by
2276 JH/28 Fix parsing of MIME headers for parameters with quoted semicolons.
2278 TL/15 SECURITY: prevent double expansion in math comparison functions
2279 (can expand unsanitized data). Not remotely exploitable.
2286 PP/01 Add -bI: framework, and -bI:sieve for querying sieve capabilities.
2288 PP/02 Make -n do something, by making it not do something.
2289 When combined with -bP, the name of an option is not output.
2291 PP/03 Added tls_dh_min_bits SMTP transport driver option, only honoured
2294 PP/04 First step towards DNSSEC, provide $sender_host_dnssec for
2295 $sender_host_name and config options to manage this, and basic check
2298 PP/05 DSCP support for outbound connections and control modifier for inbound.
2300 PP/06 Cyrus SASL: set local and remote IP;port properties for driver.
2301 (Only plugin which currently uses this is kerberos4, which nobody should
2302 be using, but we should make it available and other future plugins might
2303 conceivably use it, even though it would break NAT; stuff *should* be
2304 using channel bindings instead).
2306 PP/07 Handle "exim -L <tag>" to indicate to use syslog with tag as the process
2307 name; added for Sendmail compatibility; requires admin caller.
2308 Handle -G as equivalent to "control = suppress_local_fixups" (we used to
2309 just ignore it); requires trusted caller.
2310 Also parse but ignore: -Ac -Am -X<logfile>
2313 TL/01 Bugzilla 1258 - Refactor MAIL FROM optional args processing.
2315 TL/02 Add +smtp_confirmation as a default logging option.
2317 TL/03 Bugzilla 198 - Implement remove_header ACL modifier.
2318 Patch by Magnus Holmgren from 2007-02-20.
2320 TL/04 Bugzilla 1281 - Spec typo.
2321 Bugzilla 1283 - Spec typo.
2322 Bugzilla 1290 - Spec grammar fixes.
2324 TL/05 Bugzilla 1285 - Spec omission, fix docbook errors for spec.txt creation.
2326 TL/06 Add Experimental DMARC support using libopendmarc libraries.
2328 TL/07 Fix an out of order global option causing a segfault. Reported to dev
2329 mailing list by by Dmitry Isaikin.
2331 JH/01 Bugzilla 1201 & 304 - New cutthrough-delivery feature, with TLS support.
2333 JH/02 Support "G" suffix to numbers in ${if comparisons.
2335 PP/08 Handle smtp transport tls_sni option forced-fail for OpenSSL.
2337 NM/01 Bugzilla 1197 - Spec typo
2338 Bugzilla 1196 - Spec examples corrections
2340 JH/03 Add expansion operators ${listnamed:name} and ${listcount:string}
2342 PP/09 Add gnutls_allow_auto_pkcs11 option (was originally called
2343 gnutls_enable_pkcs11, but renamed to more accurately indicate its
2346 PP/10 Let Linux makefile inherit CFLAGS/CFLAGS_DYNAMIC.
2347 Pulled from Debian 30_dontoverridecflags.dpatch by Andreas Metzler.
2349 JH/04 Add expansion item ${acl {name}{arg}...}, expansion condition
2350 "acl {{name}{arg}...}", and optional args on acl condition
2353 JH/05 Permit multiple router/transport headers_add/remove lines.
2355 JH/06 Add dnsdb pseudo-lookup "a+" to do an "aaaa" + "a" combination.
2357 JH/07 Avoid using a waiting database for a single-message-only transport.
2358 Performance patch from Paul Fisher. Bugzilla 1262.
2360 JH/08 Strip leading/trailing newlines from add_header ACL modifier data.
2363 JH/09 Add $headers_added variable, with content from use of ACL modifier
2364 add_header (but not yet added to the message). Bugzilla 199.
2366 JH/10 Add 8bitmime log_selector, for 8bitmime status on the received line.
2367 Pulled from Bugzilla 817 by Wolfgang Breyha.
2369 PP/11 SECURITY: protect DKIM DNS decoding from remote exploit.
2371 (nb: this is the same fix as in Exim 4.80.1)
2373 JH/11 Add A= logging on delivery lines, and a client_set_id option on
2376 JH/12 Add optional authenticated_sender logging to A= and a log_selector
2379 PP/12 Unbreak server_set_id for NTLM/SPA auth, broken by 4.80 PP/29.
2381 PP/13 Dovecot auth: log better reason to rejectlog if Dovecot did not
2382 advertise SMTP AUTH mechanism to us, instead of a generic
2383 protocol violation error. Also, make Exim more robust to bad
2384 data from the Dovecot auth socket.
2386 TF/01 Fix ultimate retry timeouts for intermittently deliverable recipients.
2388 When a queue runner is handling a message, Exim first routes the
2389 recipient addresses, during which it prunes them based on the retry
2390 hints database. After that it attempts to deliver the message to
2391 any remaining recipients. It then updates the hints database using
2394 So if a recipient address works intermittently, it can get repeatedly
2395 deferred at routing time. The retry hints record remains fresh so the
2396 address never reaches the final cutoff time.
2398 This is a fairly common occurrence when a user is bumping up against
2399 their storage quota. Exim had some logic in its local delivery code
2400 to deal with this. However it did not apply to per-recipient defers
2401 in remote deliveries, e.g. over LMTP to a separate IMAP message store.
2403 This change adds a proper retry rule check during routing so that the
2404 final cutoff time is checked against the message's age. We only do
2405 this check if there is an address retry record and there is not a
2406 domain retry record; this implies that previous attempts to handle
2407 the address had the retry_use_local_parts option turned on. We use
2408 this as an approximation for the destination being like a local
2409 delivery, as in LMTP.
2411 I suspect this new check makes the old local delivery cutoff check
2412 redundant, but I have not verified this so I left the code in place.
2414 TF/02 Correct gecos expansion when From: is a prefix of the username.
2416 Test 0254 submits a message to Exim with the header
2420 When I ran the test suite under the user fanf2, Exim expanded
2421 the header to contain my full name, whereas it should have added
2422 a Resent-Sender: header. It erroneously treats any prefix of the
2423 username as equal to the username.
2425 This change corrects that bug.
2427 GF/01 DCC debug and logging tidyup
2428 Error conditions log to paniclog rather than rejectlog.
2429 Debug lines prefixed by "DCC: " to remove any ambiguity.
2431 TF/03 Avoid unnecessary rebuilds of lookup-related code.
2433 PP/14 Fix OCSP reinitialisation in SNI handling for Exim/TLS as server.
2434 Bug spotted by Jeremy Harris; was flawed since initial commit.
2435 Would have resulted in OCSP responses post-SNI triggering an Exim
2436 NULL dereference and crash.
2438 JH/13 Add $router_name and $transport_name variables. Bugzilla 308.
2440 PP/15 Define SIOCGIFCONF_GIVES_ADDR for GNU Hurd.
2441 Bug detection, analysis and fix by Samuel Thibault.
2442 Bugzilla 1331, Debian bug #698092.
2444 SC/01 Update eximstats to watch out for senders sending 'HELO [IpAddr]'
2446 JH/14 SMTP PRDR (http://www.eric-a-hall.com/specs/draft-hall-prdr-00.txt).
2447 Server implementation by Todd Lyons, client by JH.
2448 Only enabled when compiled with EXPERIMENTAL_PRDR. A new
2449 config variable "prdr_enable" controls whether the server
2450 advertises the facility. If the client requests PRDR a new
2451 acl_data_smtp_prdr ACL is called once for each recipient, after
2452 the body content is received and before the acl_smtp_data ACL.
2453 The client is controlled by both of: a hosts_try_prdr option
2454 on the smtp transport, and the server advertisement.
2455 Default client logging of deliveries and rejections involving
2456 PRDR are flagged with the string "PRDR".
2458 PP/16 Fix problems caused by timeouts during quit ACLs trying to double
2459 fclose(). Diagnosis by Todd Lyons.
2461 PP/17 Update configure.default to handle IPv6 localhost better.
2462 Patch by Alain Williams (plus minor tweaks).
2465 PP/18 OpenSSL made graceful with empty tls_verify_certificates setting.
2466 This is now consistent with GnuTLS, and is now documented: the
2467 previous undocumented portable approach to treating the option as
2468 unset was to force an expansion failure. That still works, and
2469 an empty string is now equivalent.
2471 PP/19 Renamed DNSSEC-enabling option to "dns_dnssec_ok", to make it
2472 clearer that Exim is using the DO (DNSSEC OK) EDNS0 resolver flag,
2473 not performing validation itself.
2475 PP/20 Added force_command boolean option to pipe transport.
2476 Patch from Nick Koston, of cPanel Inc.
2478 JH/15 AUTH support on callouts (and hence cutthrough-deliveries).
2481 TF/04 Added udpsend ACL modifier and hexquote expansion operator
2483 PP/21 Fix eximon continuous updating with timestamped log-files.
2484 Broken in a format-string cleanup in 4.80, missed when I repaired the
2485 other false fix of the same issue.
2486 Report and fix from Heiko Schlichting.
2489 PP/22 Guard LDAP TLS usage against Solaris LDAP variant.
2490 Report from Prashanth Katuri.
2492 PP/23 Support safari_ecdhe_ecdsa_bug for openssl_options.
2493 It's SecureTransport, so affects any MacOS clients which use the
2494 system-integrated TLS libraries, including email clients.
2496 PP/24 Fix segfault from trying to fprintf() to a NULL stdio FILE* if
2497 using a MIME ACL for non-SMTP local injection.
2498 Report and assistance in diagnosis by Warren Baker.
2500 TL/08 Adjust exiqgrep to be case-insensitive for sender/receiver.
2502 JH/16 Fix comparisons for 64b. Bugzilla 1385.
2504 TL/09 Add expansion variable $authenticated_fail_id to keep track of
2505 last id that failed so it may be referenced in subsequent ACL's.
2507 TL/10 Bugzilla 1375 - Prevent TLS rebinding in ldap. Patch provided by
2510 TL/11 Bugzilla 1382 - Option ldap_require_cert overrides start_tls
2511 ldap library initialization, allowing self-signed CA's to be
2512 used. Also properly sets require_cert option later in code by
2513 using NULL (global ldap config) instead of ldap handle (per
2514 session). Bug diagnosis and testing by alxgomz.
2516 TL/12 Enhanced documentation in the ratelimit.pl script provided in
2517 the src/util/ subdirectory.
2519 TL/13 Bug 1031 - Imported transport SQL logging patch from Axel Rau
2520 renamed to Transport Post Delivery Action by Jeremy Harris, as
2523 TL/14 Bugzilla 1217 - Redis lookup support has been added. It is only enabled
2524 when Exim is compiled with EXPERIMENTAL_REDIS. A new config variable
2525 redis_servers = needs to be configured which will be used by the redis
2526 lookup. Patch from Warren Baker, of The Packet Hub.
2528 TL/15 Fix exiqsumm summary for corner case. Patch provided by Richard Hall.
2530 TL/16 Bugzilla 1289 - Clarify host/ip processing when have errors looking up a
2531 hostname or reverse DNS when processing a host list. Used suggestions
2532 from multiple comments on this bug.
2534 TL/17 Bugzilla 1057 - Multiple clamd TCP targets patch from Mark Zealey.
2536 TL/18 Had previously added a -CONTINUE option to runtest in the test suite.
2537 Missed a few lines, added it to make the runtest require no keyboard
2540 TL/19 Bugzilla 1402 - Test 533 fails if any part of the path to the test suite
2541 contains upper case chars. Make router use caseful_local_part.
2543 TL/20 Bugzilla 1400 - Add AVOID_GNUTLS_PKCS11 build option. Allows GnuTLS
2544 support when GnuTLS has been built with p11-kit.
2550 PP/01 SECURITY: protect DKIM DNS decoding from remote exploit.
2552 This, or similar/improved, will also be change PP/11 of 4.82.
2558 PP/01 Handle short writes when writing local log-files.
2559 In practice, only affects FreeBSD (8 onwards).
2560 Bugzilla 1053, with thanks to Dmitry Isaikin.
2562 NM/01 Bugzilla 949 - Documentation tweak
2564 NM/02 Bugzilla 1093 - eximstats DATA reject detection regexps
2567 NM/03 Bugzilla 1169 - primary_hostname spelling was incorrect in docs.
2569 PP/02 Implemented gsasl authenticator.
2571 PP/03 Implemented heimdal_gssapi authenticator with "server_keytab" option.
2573 PP/04 Local/Makefile support for (AUTH|LOOKUP)_*_PC=foo to use
2574 `pkg-config foo` for cflags/libs.
2576 PP/05 Swapped $auth1/$auth2 for gsasl GSSAPI mechanism, to be more consistent
2577 with rest of GSASL and with heimdal_gssapi.
2579 PP/06 Local/Makefile support for USE_(GNUTLS|OPENSSL)_PC=foo to use
2580 `pkg-config foo` for cflags/libs for the TLS implementation.
2582 PP/07 New expansion variable $tls_bits; Cyrus SASL server connection
2583 properties get this fed in as external SSF. A number of robustness
2584 and debugging improvements to the cyrus_sasl authenticator.
2586 PP/08 cyrus_sasl server now expands the server_realm option.
2588 PP/09 Bugzilla 1214 - Log authentication information in reject log.
2589 Patch by Jeremy Harris.
2591 PP/10 Added dbmjz lookup type.
2593 PP/11 Let heimdal_gssapi authenticator take a SASL message without an authzid.
2595 PP/12 MAIL args handles TAB as well as SP, for better interop with
2596 non-compliant senders.
2597 Analysis and variant patch by Todd Lyons.
2599 NM/04 Bugzilla 1237 - fix cases where printf format usage not indicated
2600 Bug report from Lars Müller <lars@samba.org> (via SUSE),
2601 Patch from Dirk Mueller <dmueller@suse.com>
2603 PP/13 tls_peerdn now print-escaped for spool files.
2604 Observed some $tls_peerdn in wild which contained \n, which resulted
2605 in spool file corruption.
2607 PP/14 TLS fixes for OpenSSL: support TLS 1.1 & 1.2; new "openssl_options"
2608 values; set SSL_MODE_AUTO_RETRY so that OpenSSL will retry a read
2609 or write after TLS renegotiation, which otherwise led to messages
2612 TK/01 Bugzilla 1239 - fix DKIM verification when signature was not inserted
2613 as a tracking header (ie: a signed header comes before the signature).
2614 Patch from Wolfgang Breyha.
2616 JH/01 Bugzilla 660 - Multi-valued attributes from ldap now parseable as a
2617 comma-sep list; embedded commas doubled.
2619 JH/02 Refactored ACL "verify =" logic to table-driven dispatch.
2621 PP/15 LDAP: Check for errors of TLS initialisation, to give correct
2623 Report and patch from Dmitry Banschikov.
2625 PP/16 Removed "dont_insert_empty_fragments" from "openssl_options".
2626 Removed SSL_clear() after SSL_new() which led to protocol negotiation
2627 failures. We appear to now support TLS1.1+ with Exim.
2629 PP/17 OpenSSL: new expansion var $tls_sni, which if used in tls_certificate
2630 lets Exim select keys and certificates based upon TLS SNI from client.
2631 Also option tls_sni on SMTP Transports. Also clear $tls_bits correctly
2632 before an outbound SMTP session. New log_selector, +tls_sni.
2634 PP/18 Bugzilla 1122 - check localhost_number expansion for failure, avoid
2635 NULL dereference. Report and patch from Alun Jones.
2637 PP/19 DNS resolver init changes for NetBSD compatibility. (Risk of breakage
2638 on less well tested platforms). Obviates NetBSD pkgsrc patch-ac.
2639 Not seeing resolver debug output on NetBSD, but suspect this is a
2640 resolver implementation change.
2642 PP/20 Revert part of NM/04, it broke log_path containing %D expansions.
2643 Left warnings. Added "eximon gdb" invocation mode.
2645 PP/21 Defaulting "accept_8bitmime" to true, not false.
2647 PP/22 Added -bw for inetd wait mode support.
2649 PP/23 Added PCRE_CONFIG=yes support to Makefile for using pcre-config to
2650 locate the relevant includes and libraries. Made this the default.
2652 PP/24 Fixed headers_only on smtp transports (was not sending trailing dot).
2653 Bugzilla 1246, report and most of solution from Tomasz Kusy.
2655 JH/03 ${eval } now uses 64-bit and supports a "g" suffix (like to "k" and "m").
2656 This may cause build issues on older platforms.
2658 PP/25 Revamped GnuTLS support, passing tls_require_ciphers to
2659 gnutls_priority_init, ignoring Exim options gnutls_require_kx,
2660 gnutls_require_mac & gnutls_require_protocols (no longer supported).
2661 Added SNI support via GnuTLS too.
2662 Made ${randint:..} supplier available, if using not-too-old GnuTLS.
2664 PP/26 Added EXPERIMENTAL_OCSP for OpenSSL.
2666 PP/27 Applied dnsdb SPF support patch from Janne Snabb.
2667 Applied second patch from Janne, implementing suggestion to default
2668 multiple-strings-in-record handling to match SPF spec.
2670 JH/04 Added expansion variable $tod_epoch_l for a higher-precision time.
2672 PP/28 Fix DCC dcc_header content corruption (stack memory referenced,
2673 read-only, out of scope).
2674 Patch from Wolfgang Breyha, report from Stuart Northfield.
2676 PP/29 Fix three issues highlighted by clang analyser static analysis.
2677 Only crash-plausible issue would require the Cambridge-specific
2678 iplookup router and a misconfiguration.
2679 Report from Marcin Mirosław.
2681 PP/30 Another attempt to deal with PCRE_PRERELEASE, this one less buggy.
2683 PP/31 %D in printf continues to cause issues (-Wformat=security), so for
2684 now guard some of the printf checks behind WANT_DEEPER_PRINTF_CHECKS.
2685 As part of this, removing so much warning spew let me fix some minor
2686 real issues in debug logging.
2688 PP/32 GnuTLS was always using default tls_require_ciphers, due to a missing
2689 assignment on my part. Fixed.
2691 PP/33 Added tls_dh_max_bits option, defaulting to current hard-coded limit
2692 of NSS, for GnuTLS/NSS interop. Problem root cause diagnosis by
2693 Janne Snabb (who went above and beyond: thank you).
2695 PP/34 Validate tls_require_ciphers on startup, since debugging an invalid
2696 string otherwise requires a connection and a bunch more work and it's
2697 relatively easy to get wrong. Should also expose TLS library linkage
2700 PP/35 Pull in <features.h> on Linux, for some portability edge-cases of
2701 64-bit ${eval} (JH/03).
2703 PP/36 Define _GNU_SOURCE in exim.h; it's needed for some releases of
2704 GNU libc to support some of the 64-bit stuff, should not lead to
2705 conflicts. Defined before os.h is pulled in, so if a given platform
2706 needs to override this, it can.
2708 PP/37 Unbreak Cyrus SASL auth: SSF retrieval was incorrect, Exim thought
2709 protection layer was required, which is not implemented.
2710 Bugzilla 1254, patch from Wolfgang Breyha.
2712 PP/38 Overhaul DH prime handling, supply RFC-specified DH primes as built
2713 into Exim, default to IKE id 23 from RFC 5114 (2048 bit). Make
2714 tls_dhparam take prime identifiers. Also unbreak combination of
2715 OpenSSL+DH_params+TLSSNI.
2717 PP/39 Disable SSLv2 by default in OpenSSL support.
2723 PP/01 Solaris build fix for Oracle's LDAP libraries.
2724 Bugzilla 1109, patch from Stephen Usher.
2726 TF/01 HP/UX build fix: avoid arithmetic on a void pointer.
2728 TK/01 DKIM Verification: Fix relaxed canon for empty headers w/o
2731 TF/02 Fix a couple more cases where we did not log the error message
2732 when unlink() failed. See also change 4.74-TF/03.
2734 TF/03 Make the exiwhat support code safe for signals. Previously Exim might
2735 lock up or crash if it happened to be inside a call to libc when it
2736 got a SIGUSR1 from exiwhat.
2738 The SIGUSR1 handler appends the current process status to the process
2739 log which is later printed by exiwhat. It used to use the general
2740 purpose logging code to do this, but several functions it calls are
2741 not safe for signals.
2743 The new output code in the SIGUSR1 handler is specific to the process
2744 log, and simple enough that it's easy to inspect for signal safety.
2745 Removing some special cases also simplifies the general logging code.
2746 Removing the spurious timestamps from the process log simplifies
2749 TF/04 Improved ratelimit ACL condition.
2751 The /noupdate option has been deprecated in favour of /readonly which
2752 has clearer semantics. The /leaky, /strict, and /readonly update modes
2753 are mutually exclusive. The update mode is no longer included in the
2754 database key; it just determines when the database is updated. (This
2755 means that when you upgrade Exim will forget old rate measurements.)
2757 Exim now checks that the per_* options are used with an update mode that
2758 makes sense for the current ACL. For example, when Exim is processing a
2759 message (e.g. acl_smtp_rcpt or acl_smtp_data, etc.) you can specify
2760 per_mail/leaky or per_mail/strict; otherwise (e.g. in acl_smtp_helo) you
2761 must specify per_mail/readonly. If you omit the update mode it defaults to
2762 /leaky where that makes sense (as before) or /readonly where required.
2764 The /noupdate option is now undocumented but still supported for
2765 backwards compatibility. It is equivalent to /readonly except that in
2766 ACLs where /readonly is required you may specify /leaky/noupdate or
2767 /strict/noupdate which are treated the same as /readonly.
2769 A useful new feature is the /count= option. This is a generalization
2770 of the per_byte option, so that you can measure the throughput of other
2771 aggregate values. For example, the per_byte option is now equivalent
2772 to per_mail/count=${if >{0}{$message_size} {0} {$message_size} }.
2774 The per_rcpt option has been generalized using the /count= mechanism
2775 (though it's more complicated than the per_byte equivalence). When it is
2776 used in acl_smtp_rcpt, the per_rcpt option adds recipients to the
2777 measured rate one at a time; if it is used later (e.g. in acl_smtp_data)
2778 or in a non-SMTP ACL it adds all the recipients in one go. (The latter
2779 /count=$recipients_count behaviour used to work only in non-SMTP ACLs.)
2780 Note that using per_rcpt with a non-readonly update mode in more than
2781 one ACL will cause the recipients to be double-counted. (The per_mail
2782 and per_byte options don't have this problem.)
2784 The handling of very low rates has changed slightly. If the computed rate
2785 is less than the event's count (usually one) then this event is the first
2786 after a long gap. In this case the rate is set to the same as this event's
2787 count, so that the first message of a spam run is counted properly.
2789 The major new feature is a mechanism for counting the rate of unique
2790 events. The new per_addr option counts the number of different
2791 recipients that someone has sent messages to in the last time period. It
2792 behaves like per_rcpt if all the recipient addresses are different, but
2793 duplicate recipient addresses do not increase the measured rate. Like
2794 the /count= option this is a general mechanism, so the per_addr option
2795 is equivalent to per_rcpt/unique=$local_part@$domain. You can, for
2796 example, measure the rate that a client uses different sender addresses
2797 with the options per_mail/unique=$sender_address. There are further
2798 details in the main documentation.
2800 TF/05 Removed obsolete $Cambridge$ CVS revision strings.
2802 TF/06 Removed a few PCRE remnants.
2804 TF/07 Automatically extract Exim's version number from tags in the git
2805 repository when doing development or release builds.
2807 PP/02 Raise smtp_cmd_buffer_size to 16kB.
2808 Bugzilla 879. Patch from Paul Fisher.
2810 PP/03 Implement SSL-on-connect outbound with protocol=smtps on smtp transport.
2811 Heavily based on revision 40f9a89a from Simon Arlott's tree.
2814 PP/04 Use .dylib instead of .so for dynamic library loading on MacOS.
2816 PP/05 Variable $av_failed, true if the AV scanner deferred.
2817 Bugzilla 1078. Patch from John Horne.
2819 PP/06 Stop make process more reliably on build failure.
2820 Bugzilla 1087. Patch from Heiko Schlittermann.
2822 PP/07 Make maildir_use_size_file an _expandable_ boolean.
2823 Bugzilla 1089. Patch from Heiko Schlittermann.
2825 PP/08 Handle ${run} returning more data than OS pipe buffer size.
2826 Bugzilla 1131. Patch from Holger Weiß.
2828 PP/09 Handle IPv6 addresses with SPF.
2829 Bugzilla 860. Patch from Wolfgang Breyha.
2831 PP/10 GnuTLS: support TLS 1.2 & 1.1.
2833 Use gnutls_certificate_verify_peers2() [patch from Andreas Metzler].
2836 PP/11 match_* no longer expand right-hand-side by default.
2837 New compile-time build option, EXPAND_LISTMATCH_RHS.
2838 New expansion conditions, "inlist", "inlisti".
2840 PP/12 fix uninitialised greeting string from PP/03 (smtps client support).
2842 PP/13 shell and compiler warnings fixes for RC1-RC4 changes.
2844 PP/14 fix log_write() format string regression from TF/03.
2845 Bugzilla 1152. Patch from Dmitry Isaikin.
2851 PP/01 The new ldap_require_cert option would segfault if used. Fixed.
2853 PP/02 Harmonised TLS library version reporting; only show if debugging.
2854 Layout now matches that introduced for other libraries in 4.74 PP/03.
2856 PP/03 New openssl_options items: no_sslv2 no_sslv3 no_ticket no_tlsv1
2858 PP/04 New "dns_use_edns0" global option.
2860 PP/05 Don't segfault on misconfiguration of ref:name exim-user as uid.
2863 PP/06 Extra paranoia around buffer usage at the STARTTLS transition.
2864 nb: Exim is not vulnerable to http://www.kb.cert.org/vuls/id/555316
2866 TK/01 Updated PolarSSL code to 0.14.2.
2867 Bugzilla 1097. Patch from Andreas Metzler.
2869 PP/07 Catch divide-by-zero in ${eval:...}.
2870 Fixes bugzilla 1102.
2872 PP/08 Condition negation of bool{}/bool_lax{} did not negate. Fixed.
2875 TK/02 Bugzilla 1106: CVE-2011-1764 - DKIM log line was subject to a
2876 format-string attack -- SECURITY: remote arbitrary code execution.
2878 TK/03 SECURITY - DKIM signature header parsing was double-expanded, second
2879 time unintentionally subject to list matching rules, letting the header
2880 cause arbitrary Exim lookups (of items which can occur in lists, *not*
2881 arbitrary string expansion). This allowed for information disclosure.
2883 PP/09 Fix another SIGFPE (x86) in ${eval:...} expansion, this time related to
2884 INT_MIN/-1 -- value coerced to INT_MAX.
2890 NM/01 Workaround for PCRE version dependency in version reporting
2893 TF/01 Update valgrind.h and memcheck.h to copies from valgrind-3.6.0.
2894 This fixes portability to compilers other than gcc, notably
2895 Solaris CC and HP-UX CC. Fixes Bugzilla 1050.
2897 TF/02 Bugzilla 139: Avoid using the += operator in the modular lookup
2898 makefiles for portability to HP-UX and POSIX correctness.
2900 PP/01 Permit LOOKUP_foo enabling on the make command-line.
2901 Also via indented variable definition in the Makefile.
2902 (Debugging by Oliver Heesakkers).
2904 PP/02 Restore caching of spamd results with expanded spamd_address.
2905 Patch from author of expandable spamd_address patch, Wolfgang Breyha.
2907 PP/03 Build issue: lookups-Makefile now exports LC_ALL=C
2908 Improves build reliability. Fix from: Frank Elsner
2910 NM/02 Fix wide character breakage in the rfc2047 coding
2911 Fixes bug 1064. Patch from Andrey N. Oktyabrski
2913 NM/03 Allow underscore in dnslist lookups
2914 Fixes bug 1026. Patch from Graeme Fowler
2916 PP/04 Bugzilla 230: Support TLS-enabled LDAP (in addition to ldaps).
2917 Code patches from Adam Ciarcinski of NetBSD.
2919 NM/04 Fixed exiqgrep to cope with mailq missing size issue
2922 PP/05 Bugzilla 1083: when lookup expansion defers, escape the output which
2923 is logged, to avoid truncation. Patch from John Horne.
2925 PP/06 Bugzilla 1042: implement freeze_signal on pipe transports.
2926 Patch from Jakob Hirsch.
2928 PP/07 Bugzilla 1061: restrict error messages sent over SMTP to not reveal
2929 SQL string expansion failure details.
2930 Patch from Andrey Oktyabrski.
2932 PP/08 Bugzilla 486: implement %M datestamping in log filenames.
2933 Patch from Simon Arlott.
2935 PP/09 New lookups functionality failed to compile on old gcc which rejects
2936 extern declarations in function scope.
2937 Patch from Oliver Fleischmann
2939 PP/10 Use sig_atomic_t for flags set from signal handlers.
2940 Check getgroups() return and improve debugging.
2941 Fixed developed for diagnosis in bug 927 (which turned out to be
2944 PP/11 Bugzilla 1055: Update $message_linecount for maildir_tag.
2945 Patch from Mark Zealey.
2947 PP/12 Bugzilla 1056: Improved spamd server selection.
2948 Patch from Mark Zealey.
2950 PP/13 Bugzilla 1086: Deal with maildir quota file races.
2951 Based on patch from Heiko Schlittermann.
2953 PP/14 Bugzilla 1019: DKIM multiple signature generation fix.
2954 Patch from Uwe Doering, sign-off by Michael Haardt.
2956 NM/05 Fix to spam.c to accommodate older gcc versions which dislike
2957 variable declaration deep within a block. Bug and patch from
2960 PP/15 lookups-Makefile IRIX compatibility coercion.
2962 PP/16 Make DISABLE_DKIM build knob functional.
2964 NM/06 Bugzilla 968: child_open_uid: restore default SIGPIPE handler
2965 Patch by Simon Arlott
2967 TF/03 Fix valgrind.h portability to C89 compilers that do not support
2968 variable argument macros. Our copy now differs from upstream.
2974 TF/01 Failure to get a lock on a hints database can have serious
2975 consequences so log it to the panic log.
2977 TF/02 Log LMTP confirmation messages in the same way as SMTP,
2978 controlled using the smtp_confirmation log selector.
2980 TF/03 Include the error message when we fail to unlink a spool file.
2982 DW/01 Bugzilla 139: Support dynamically loaded lookups as modules.
2983 With thanks to Steve Haslam, Johannes Berg & Serge Demonchaux
2984 for maintaining out-of-tree patches for some time.
2986 PP/01 Bugzilla 139: Documentation and portability issues.
2987 Avoid GNU Makefile-isms, let Exim continue to build on BSD.
2988 Handle per-OS dynamic-module compilation flags.
2990 PP/02 Let /dev/null have normal permissions.
2991 The 4.73 fixes were a little too stringent and complained about the
2992 permissions on /dev/null. Exempt it from some checks.
2993 Reported by Andreas M. Kirchwitz.
2995 PP/03 Report version information for many libraries, including
2996 Exim version information for dynamically loaded libraries. Created
2997 version.h, now support a version extension string for distributors
2998 who patch heavily. Dynamic module ABI change.
3000 PP/04 CVE-2011-0017 - check return value of setuid/setgid. This is a
3001 privilege escalation vulnerability whereby the Exim run-time user
3002 can cause root to append content of the attacker's choosing to
3005 PP/05 Bugzilla 1041: merged DCC maintainer's fixes for return code.
3008 PP/06 Bugzilla 1071: fix delivery logging with untrusted macros.
3009 If dropping privileges for untrusted macros, we disabled normal logging
3010 on the basis that it would fail; for the Exim run-time user, this is not
3011 the case, and it resulted in successful deliveries going unlogged.
3012 Fixed. Reported by Andreas Metzler.
3018 PP/01 Date: & Message-Id: revert to normally being appended to a message,
3019 only prepend for the Resent-* case. Fixes regression introduced in
3020 Exim 4.70 by NM/22 for Bugzilla 607.
3022 PP/02 Include check_rfc2047_length in configure.default because we're seeing
3023 increasing numbers of administrators be bitten by this.
3025 JJ/01 Added DISABLE_DKIM and comment to src/EDITME
3027 PP/03 Bugzilla 994: added openssl_options main configuration option.
3029 PP/04 Bugzilla 995: provide better SSL diagnostics on failed reads.
3031 PP/05 Bugzilla 834: provide a permit_coredump option for pipe transports.
3033 PP/06 Adjust NTLM authentication to handle SASL Initial Response.
3035 PP/07 If TLS negotiated an anonymous cipher, we could end up with SSL but
3036 without a peer certificate, leading to a segfault because of an
3037 assumption that peers always have certificates. Be a little more
3038 paranoid. Problem reported by Martin Tscholak.
3040 PP/08 Bugzilla 926: switch ClamAV to use the new zINSTREAM API for content
3041 filtering; old API available if built with WITH_OLD_CLAMAV_STREAM=yes
3042 NB: ClamAV planning to remove STREAM in "middle of 2010".
3043 CL also introduces -bmalware, various -d+acl logging additions and
3044 more caution in buffer sizes.
3046 PP/09 Implemented reverse_ip expansion operator.
3048 PP/10 Bugzilla 937: provide a "debug" ACL control.
3050 PP/11 Bugzilla 922: Documentation dusting, patch provided by John Horne.
3052 PP/12 Bugzilla 973: Implement --version.
3054 PP/13 Bugzilla 752: Refuse to build/run if Exim user is root/0.
3056 PP/14 Build without WITH_CONTENT_SCAN. Path from Andreas Metzler.
3058 PP/15 Bugzilla 816: support multiple condition rules on Routers.
3060 PP/16 Add bool_lax{} expansion operator and use that for combining multiple
3061 condition rules, instead of bool{}. Make both bool{} and bool_lax{}
3062 ignore trailing whitespace.
3064 JJ/02 prevent non-panic DKIM error from being sent to paniclog
3066 JJ/03 added tcp_wrappers_daemon_name to allow host entries other than
3069 PP/17 Fix malware regression for cmdline scanner introduced in PP/08.
3070 Notification from Dr Andrew Aitchison.
3072 PP/18 Change ClamAV response parsing to be more robust and to handle ClamAV's
3073 ExtendedDetectionInfo response format.
3074 Notification from John Horne.
3076 PP/19 OpenSSL 1.0.0a compatibility const-ness change, should be backwards
3079 PP/20 Added a CONTRIBUTING file. Fixed the documentation build to use http:
3080 XSL and documented dependency on system catalogs, with examples of how
3083 DW/21 Added Valgrind hooks in store.c to help it capture out-of-bounds store
3086 DW/22 Bugzilla 1044: CVE-2010-4345 - partial fix: restrict default behaviour
3087 of CONFIGURE_OWNER and CONFIGURE_GROUP options to no longer allow a
3088 configuration file which is writeable by the Exim user or group.
3090 DW/23 Bugzilla 1044: CVE-2010-4345 - part two: extend checks for writeability
3091 of configuration files to cover files specified with the -C option if
3092 they are going to be used with root privileges, not just the default
3095 DW/24 Bugzilla 1044: CVE-2010-4345 - part three: remove ALT_CONFIG_ROOT_ONLY
3096 option (effectively making it always true).
3098 DW/25 Add TRUSTED_CONFIG_PREFIX_FILE option to allow alternative configuration
3099 files to be used while preserving root privileges.
3101 DW/26 Set FD_CLOEXEC on SMTP sockets after forking in the daemon, to ensure
3102 that rogue child processes cannot use them.
3104 PP/27 Bugzilla 1047: change the default for system_filter_user to be the Exim
3105 run-time user, instead of root.
3107 PP/28 Add WHITELIST_D_MACROS option to let some macros be overridden by the
3108 Exim run-time user without dropping privileges.
3110 DW/29 Remove use of va_copy() which breaks pre-C99 systems. Duplicate the
3111 result string, instead of calling string_vformat() twice with the same
3114 DW/30 Allow TRUSTED_CONFIG_PREFIX_FILE only for Exim or CONFIGURE_OWNER, not
3115 for other users. Others should always drop root privileges if they use
3116 -C on the command line, even for a whitelisted configure file.
3118 DW/31 Turn TRUSTED_CONFIG_PREFIX_FILE into TRUSTED_CONFIG_FILE. No prefixes.
3120 NM/01 Fixed bug #1002 - Message loss when using multiple deliveries
3126 JJ/01 installed exipick 20100104.1, adding $max_received_linelength,
3127 $data_path, and $header_path variables; fixed documentation bugs and
3130 JJ/02 installed exipick 20100222.0, added --input-dir and --finput to allow
3131 exipick to access non-standard spools, including the "frozen" queue
3134 NM/01 Bugzilla 965: Support mysql stored procedures.
3135 Patch from Alain Williams
3137 NM/02 Bugzilla 961: Spacing fix (syntax error) on Makefile directives for NetBSD
3139 NM/03 Bugzilla 955: Documentation fix for max_rcpts.
3140 Patch from Andreas Metzler
3142 NM/04 Bugzilla 954: Fix for unknown responses from Dovecot authenticator.
3143 Patch from Kirill Miazine
3145 NM/05 Bugzilla 671: Added umask to procmail example.
3147 JJ/03 installed exipick 20100323.0, fixing doc bug
3149 NM/06 Bugzilla 988: CVE-2010-2023 - prevent hardlink attack on sticky mail
3150 directory. Notification and patch from Dan Rosenberg.
3152 TK/01 PDKIM: Upgrade PolarSSL files to upstream version 0.12.1.
3154 TK/02 Improve log output when DKIM signing operation fails.
3156 MH/01 Treat the transport option dkim_domain as a colon separated
3157 list, not as a single string, and sign the message with each element,
3158 omitting multiple occurences of the same signer.
3160 NM/07 Null terminate DKIM strings, Null initialise DKIM variable
3161 Bugzilla 985, 986. Patch by Simon Arlott
3163 NM/08 Bugzilla 967. dnsdb DNS TXT record bug fix (DKIM-related)
3164 Patch by Simon Arlott
3166 PP/01 Bugzilla 989: CVE-2010-2024 - work round race condition on
3167 MBX locking. Notification from Dan Rosenberg.
3173 TK/01 Bugzilla 912: Fix DKIM segfault on empty headers/body.
3175 NM/01 Bugzilla 913: Documentation fix for gnutls_* options.
3177 NM/02 Bugzilla 722: Documentation for randint. Better randomness defaults.
3179 NM/03 Bugzilla 847: Enable DNSDB lookup by default.
3181 NM/04 Bugzilla 915: Flag broken perl installation during build.
3187 TK/01 Added patch by Johannes Berg that expands the main option
3188 "spamd_address" if it starts with a dollar sign.
3190 TK/02 Write list of recipients to X-Envelope-Sender header when building
3191 the mbox-format spool file for content scanning (suggested by Jakob
3194 TK/03 Added patch by Wolfgang Breyha that adds experimental DCC
3195 (http://www.dcc-servers.net/) support via dccifd. Activated by
3196 setting EXPERIMENTAL_DCC=yes in Local/Makefile.
3198 TK/04 Bugzilla 673: Add f-protd malware scanner support. Patch submitted
3199 by Mark Daniel Reidel <mr@df.eu>.
3201 NM/01 Bugzilla 657: Embedded PCRE removed from the exim source tree.
3202 When building exim an external PCRE library is now needed -
3203 PCRE is a system library on the majority of modern systems.
3204 See entry on PCRE_LIBS in EDITME file.
3206 NM/02 Bugzilla 646: Removed unwanted C/R in Dovecot authenticator
3207 conversation. Added nologin parameter to request.
3208 Patch contributed by Kirill Miazine.
3210 TF/01 Do not log submission mode rewrites if they do not change the address.
3212 TF/02 Bugzilla 662: Fix stack corruption before exec() in daemon.c.
3214 NM/03 Bugzilla 602: exicyclog now handles panic log, and creates empty
3215 log files in place. Contributed by Roberto Lima.
3217 NM/04 Bugzilla 667: Close socket used by dovecot authenticator.
3219 TF/03 Bugzilla 615: When checking the local_parts router precondition
3220 after a local_part_suffix or local_part_prefix option, Exim now
3221 does not use the address's named list lookup cache, since this
3222 contains cached lookups for the whole local part.
3224 NM/05 Bugzilla 521: Integrated SPF Best Guess support contributed by
3225 Robert Millan. Documentation is in experimental-spec.txt.
3227 TF/04 Bugzilla 668: Fix parallel build (make -j).
3229 NM/05.2 Bugzilla 437: Prevent Maildir aux files being created with mode 000.
3231 NM/05.3 Bugzilla 598: Improvement to Dovecot authenticator handling.
3232 Patch provided by Jan Srzednicki.
3234 TF/05 Leading white space used to be stripped from $spam_report which
3235 wrecked the formatting. Now it is preserved.
3237 TF/06 Save $spam_score, $spam_bar, and $spam_report in spool files, so
3238 that they are available at delivery time.
3240 TF/07 Fix the way ${extract is skipped in the untaken branch of a conditional.
3242 TF/08 TLS error reporting now respects the incoming_interface and
3243 incoming_port log selectors.
3245 TF/09 Produce a more useful error message if an SMTP transport's hosts
3246 setting expands to an empty string.
3248 NM/06 Bugzilla 744: EXPN did not work under TLS.
3249 Patch provided by Phil Pennock.
3251 NM/07 Bugzilla 769: Extraneous comma in usage fprintf
3252 Patch provided by Richard Godbee.
3254 NM/08 Fixed erroneous documentation references to smtp_notquit_acl to be
3255 acl_smtp_notquit, added index entry.
3257 NM/09 Bugzilla 787: Potential buffer overflow in string_format.
3258 Patch provided by Eugene Bujak.
3260 NM/10 Bugzilla 770: Problem on some platforms modifying the len parameter to
3261 accept(). Patch provided by Maxim Dounin.
3263 NM/11 Bugzilla 749: Preserve old behaviour of blanks comparing equal to zero.
3264 Patch provided by Phil Pennock.
3266 NM/12 Bugzilla 497: Correct behaviour of exiwhat when no config exists.
3268 NM/13 Bugzilla 590: Correct handling of Resent-Date headers.
3269 Patch provided by Brad "anomie" Jorsch.
3271 NM/14 Bugzilla 622: Added timeout setting to transport filter.
3272 Patch provided by Dean Brooks.
3274 TK/05 Add native DKIM support (does not depend on external libraries).
3276 NM/15 Bugzilla 854: Removed code that symlinks to pcre as its no longer useful.
3277 Patch provided by Graeme Fowler.
3279 NM/16 Bugzilla 851: Documentation example syntax fix.
3281 NM/17 Changed NOTICE file to remove references to embedded PCRE.
3283 NM/18 Bugzilla 894: Fix issue with very long lines including comments in
3286 NM/19 Bugzilla 745: TLS version reporting.
3287 Patch provided by Phil Pennock.
3289 NM/20 Bugzilla 167: bool: condition support.
3290 Patch provided by Phil Pennock.
3292 NM/21 Bugzilla 665: gnutls_compat_mode to allow compatibility with broken
3293 clients. Patch provided by Phil Pennock.
3295 NM/22 Bugzilla 607: prepend (not append) Resent-Message-ID and Resent-Date.
3296 Patch provided by Brad "anomie" Jorsch.
3298 NM/23 Bugzilla 687: Fix misparses in eximstats.
3299 Patch provided by Heiko Schlittermann.
3301 NM/24 Bugzilla 688: Fix exiwhat to handle log_selector = +pid.
3302 Patch provided by Heiko Schlittermann.
3304 NM/25 Bugzilla 727: Use transport mode as default mode for maildirsize file.
3305 plus update to original patch.
3307 NM/26 Bugzilla 799: Documentation correction for ratelimit.
3309 NM/27 Bugzilla 802: Improvements to local interface IP addr detection.
3310 Patch provided by David Brownlee.
3312 NM/28 Bugzilla 807: Improvements to LMTP delivery logging.
3314 NM/29 Bugzilla 862, 866, 875: Documentation bugfixes.
3316 NM/30 Bugzilla 888: TLS documentation bugfixes.
3318 NM/31 Bugzilla 896: Dovecot buffer overrun fix.
3320 NM/32 Bugzilla 889: Change all instances of "expr" in shell scripts to "expr --"
3321 Unlike the original bugzilla I have changed all shell scripts in src tree.
3323 NM/33 Bugzilla 898: Transport filter timeout fix.
3324 Patch by Todd Rinaldo.
3326 NM/34 Bugzilla 901: Fix sign/unsigned and UTF mismatches.
3327 Patch by Serge Demonchaux.
3329 NM/35 Bugzilla 39: Base64 decode bug fixes.
3330 Patch by Jakob Hirsch.
3332 NM/36 Bugzilla 909: Correct connect() call in dcc code.
3334 NM/37 Bugzilla 910: Correct issue with relaxed/simple handling.
3336 NM/38 Bugzilla 908: Removed NetBSD3 support as no longer needed.
3338 NM/39 Bugzilla 911: Fixed MakeLinks build script.
3344 TK/01 Add preliminary DKIM support. Currently requires a forked version of
3345 ALT-N's libdkim that I have put here:
3346 http://duncanthrax.net/exim-experimental/
3348 Note to Michael Haardt: I had to rename some vars in sieve.c. They
3349 were called 'true' and it seems that C99 defines that as a reserved
3350 keyword to be used with 'bool' variable types. That means you could
3351 not include C99-style headers which use bools without triggering
3352 build errors in sieve.c.
3354 NM/01 Bugzilla 592: --help option is handled incorrectly if exim is invoked
3355 as mailq or other aliases. Changed the --help handling significantly
3356 to do whats expected. exim_usage() emits usage/help information.
3358 SC/01 Added the -bylocaldomain option to eximstats.
3360 NM/02 Bugzilla 619: Defended against bad data coming back from gethostbyaddr.
3362 NM/03 Bugzilla 613: Documentation fix for acl_not_smtp.
3364 NM/04 Bugzilla 628: PCRE update to 7.4 (work done by John Hall).
3370 PH/01 Another patch from the Sieve maintainer.
3372 PH/02 When an IPv6 address is converted to a string for single-key lookup
3373 in an address list (e.g. for an item such as "net24-dbm;/net/works"),
3374 dots are used instead of colons so that keys in lsearch files need not
3375 contain colons. This was done some time before quoting was made available
3376 in lsearch files. However, iplsearch files do require colons in IPv6 keys
3377 (notated using the quote facility) so as to distinguish them from IPv4
3378 keys. This meant that lookups for IP addresses in host lists did not work
3379 for iplsearch lookups.
3381 This has been fixed by arranging for IPv6 addresses to be expressed with
3382 colons if the lookup type is iplsearch. This is not incompatible, because
3383 previously such lookups could never work.
3385 The situation is now rather anomalous, since one *can* have colons in
3386 ordinary lsearch keys. However, making the change in all cases is
3387 incompatible and would probably break a number of configurations.
3389 TK/01 Change PRVS address formatting scheme to reflect latests BATV draft
3392 MH/01 The "spam" ACL condition code contained a sscanf() call with a %s
3393 conversion specification without a maximum field width, thereby enabling
3394 a rogue spamd server to cause a buffer overflow. While nobody in their
3395 right mind would setup Exim to query an untrusted spamd server, an
3396 attacker that gains access to a server running spamd could potentially
3397 exploit this vulnerability to run arbitrary code as the Exim user.
3399 TK/02 Bugzilla 502: Apply patch to make the SPF-Received: header use
3400 $primary_hostname instead of what libspf2 thinks the hosts name is.
3402 MH/02 The dsearch lookup now uses lstat(2) instead of stat(2) to look for
3403 a directory entry by the name of the lookup key. Previously, if a
3404 symlink pointed to a non-existing file or a file in a directory that
3405 Exim lacked permissions to read, a lookup for a key matching that
3406 symlink would fail. Now it is enough that a matching directory entry
3407 exists, symlink or not. (Bugzilla 503.)
3409 PH/03 The body_linecount and body_zerocount variables are now exported in the
3412 PH/04 Added the $dnslist_matched variable.
3414 PH/05 Unset $tls_cipher and $tls_peerdn before making a connection as a client.
3415 This means they are set thereafter only if the connection becomes
3418 PH/06 Added the client_condition to authenticators so that some can be skipped
3419 by clients under certain conditions.
3421 PH/07 The error message for a badly-placed control=no_multiline_responses left
3422 "_responses" off the end of the name.
3424 PH/08 Added -Mvc to output a copy of a message in RFC 2822 format.
3426 PH/09 Tidied the code for creating ratelimiting keys, creating them explicitly
3427 (without spaces) instead of just copying the configuration text.
3429 PH/10 Added the /noupdate option to the ratelimit ACL condition.
3431 PH/11 Added $max_received_linelength.
3433 PH/12 Added +ignore_defer and +include_defer to host lists.
3435 PH/13 Installed PCRE version 7.2. This needed some changes because of the new
3436 way in which PCRE > 7.0 is built.
3438 PH/14 Implemented queue_only_load_latch.
3440 PH/15 Removed an incorrect (int) cast when reading the value of SIZE in a
3441 MAIL command. The effect was to mangle the value on 64-bit systems.
3443 PH/16 Another patch from the Sieve maintainer.
3445 PH/17 Added the NOTQUIT ACL, based on a patch from Ted Cooper.
3447 PH/18 If a system quota error occurred while trying to create the file for
3448 a maildir delivery, the message "Mailbox is full" was not appended to the
3449 bounce if the delivery eventually timed out. Change 4.67/27 below applied
3450 only to a quota excession during the actual writing of the file.
3452 PH/19 It seems that peer DN values may contain newlines (and other non-printing
3453 characters?) which causes problems in log lines. The DN values are now
3454 passed through string_printing() before being added to log lines.
3456 PH/20 Added the "servers=" facility to MySQL and PostgreSQL lookups. (Oracle
3457 and InterBase are left for another time.)
3459 PH/21 Added message_body_newlines option.
3461 PH/22 Guard against possible overflow in moan_check_errorcopy().
3463 PH/23 POSIX allows open() to be a macro; guard against that.
3465 PH/24 If the recipient of an error message contained an @ in the local part
3466 (suitably quoted, of course), incorrect values were put in $domain and
3467 $local_part during the evaluation of errors_copy.
3473 MH/01 Fix for bug #448, segfault in Dovecot authenticator when interface_address
3474 is unset (happens when testing with -bh and -oMi isn't used). Thanks to
3477 PH/01 Added a new log selector smtp_no_mail, to log SMTP sessions that do not
3478 issue a MAIL command.
3480 PH/02 In an ACL statement such as
3482 deny dnslists = X!=127.0.0.2 : X=127.0.0.2
3484 if a client was not listed at all, or was listed with a value other than
3485 127.0.0.2, in the X list, but was listed with 127.0.0.2 in the Y list,
3486 the condition was not true (as it should be), so access was not denied.
3487 The bug was that the ! inversion was incorrectly passed on to the second
3488 item. This has been fixed.
3490 PH/03 Added additional dnslists conditions == and =& which are different from
3491 = and & when the dns lookup returns more than one IP address.
3493 PH/04 Added gnutls_require_{kx,mac,protocols} to give more control over the
3494 cipher suites used by GnuTLS. These options are ignored by OpenSSL.
3496 PH/05 After discussion on the list, added a compile time option ENABLE_DISABLE_
3497 FSYNC, which compiles an option called disable_fsync that allows for
3498 bypassing fsync(). The documentation is heavily laced with warnings.
3500 SC/01 Updated eximstats to collate all SpamAssassin rejects into one bucket.
3502 PH/06 Some tidies to the infrastructure of the Test Suite that is concerned
3503 with the auxiliary C programs that it uses: (1) Arrange for BIND_8_COMPAT
3504 to be defined when compiling on OSX (Darwin); (2) Tidies to the Makefile,
3505 including adding "make clean"; (3) Added -fPIC when compiling the test
3506 dynamically loaded module, to get rid of a warning.
3508 MH/02 Fix for bug #451, causing paniclog entries to be written if a bounce
3509 message fails, move_frozen_messages = true and ignore_bounce_errors_after
3510 = 0s. The bug is otherwise harmless.
3512 PH/07 There was a bug in the dovecot authenticator such that the value of
3513 $auth1 could be overwritten, and so not correctly preserved, after a
3514 successful authentication. This usually meant that the value preserved by
3515 the server_setid option was incorrect.
3517 PH/08 Added $smtp_count_at_connection_start, deliberately with a long name.
3519 PH/09 Installed PCRE release 7.0.
3521 PH/10 The acl_not_smtp_start ACL was, contrary to the documentation, not being
3522 run for batched SMTP input. It is now run at the start of every message
3523 in the batch. While fixing this I discovered that the process information
3524 (output by running exiwhat) was not always getting set for -bs and -bS
3525 input. This is fixed, and it now also says "batched" for BSMTP.
3527 PH/11 Added control=no_pipelining.
3529 PH/12 Added $sending_ip_address and $sending_port (mostly Magnus Holmgren's
3530 patch, slightly modified), and move the expansion of helo_data till after
3531 the connection is made in the smtp transport (so it can use these
3534 PH/13 Added ${rfc2047d: to decoded RFC 2047 strings.
3536 PH/14 Added log_selector = +pid.
3538 PH/15 Flush SMTP output before delaying, unless control=no_delay_flush is set.
3540 PH/16 Add ${if forany and ${if forall.
3542 PH/17 Added dsn_from option to vary the From: line in DSNs.
3544 PH/18 Flush SMTP output before performing a callout, unless control =
3545 no_callout_flush is set.
3547 PH/19 Change 4.64/PH/36 introduced a bug: when address_retry_include_sender
3548 was true (the default) a successful delivery failed to delete the retry
3549 item, thus causing premature timeout of the address. The bug is now
3552 PH/20 Added hosts_avoid_pipelining to the smtp transport.
3554 PH/21 Long custom messages for fakedefer and fakereject are now split up
3555 into multiline responses in the same way that messages for "deny" and
3556 other ACL rejections are.
3558 PH/22 Applied Jori Hamalainen's speed-up changes and typo fixes to exigrep,
3559 with slight modification.
3561 PH/23 Applied sieve patches from the maintainer "tracking the latest notify
3562 draft, changing the syntax and factoring some duplicate code".
3564 PH/24 When the log selector "outgoing_port" was set, the port was shown as -1
3565 for deliveries of the second and subsequent messages over the same SMTP
3568 PH/25 Applied Magnus Holmgren's patch for ${addresses, ${map, ${filter, and
3569 ${reduce, with only minor "tidies".
3571 SC/02 Applied Daniel Tiefnig's patch to improve the '($parent) =' pattern match.
3573 PH/26 Added a "continue" ACL modifier that does nothing, for the benefit of its
3574 expansion side effects.
3576 PH/27 When a message times out after an over-quota error from an Exim-imposed
3577 quota, the bounce message says "mailbox is full". This message was not
3578 being given when it was a system quota that was exceeded. It now should
3581 MH/03 Made $recipients available in local_scan(). local_scan() already has
3582 better access to the recipient list through recipients_list[], but
3583 $recipients can be useful in postmaster-provided expansion strings.
3585 PH/28 The $smtp_command and $smtp_command_argument variables were not correct
3586 in the case of a MAIL command with additional options following the
3587 address, for example: MAIL FROM:<foo@bar> SIZE=1234. The option settings
3588 were accidentally chopped off.
3590 PH/29 SMTP synchronization checks are implemented when a command is read -
3591 there is a check that no more input is waiting when there shouldn't be
3592 any. However, for some commands, a delay in an ACL can mean that it is
3593 some time before the response is written. In this time, more input might
3594 arrive, invalidly. So now there are extra checks after an ACL has run for
3595 HELO/EHLO and after the predata ACL, and likewise for MAIL and RCPT when
3596 pipelining has not been advertised.
3598 PH/30 MH's patch to allow iscntrl() characters to be list separators.
3600 PH/31 Unlike :fail:, a custom message specified with :defer: was not being
3601 returned in the SMTP response when smtp_return_error_details was false.
3602 This has been fixed.
3604 PH/32 Change the Dovecot authenticator to use read() and write() on the socket
3605 instead of the C I/O that was originally supplied, because problems were
3606 reported on Solaris.
3608 PH/33 Compile failed with OpenSSL 0.9.8e. This was due to a coding error in
3609 Exim which did not show up earlier: it was assuming that a call to
3610 SSL_CTX_set_info_callback() might give an error value. In fact, there is
3611 no error. In previous releases of OpenSSL, SSL_CTX_set_info_callback()
3612 was a macro that became an assignment, so it seemed to work. This has
3613 changed to a proper function call with a void return, hence the compile
3614 error. Exim's code has been fixed.
3616 PH/34 Change HDA_SIZE in oracle.c from 256 to 512. This is needed for 64-bit
3619 PH/35 Applied a patch from the Sieve maintainer which fixes a bug in "notify".
3621 PH/36 Applied John Jetmore's patch to add -v functionality to exigrep.
3623 PH/37 If a message is not accepted after it has had an id assigned (e.g.
3624 because it turns out to be too big or there is a timeout) there is no
3625 "Completed" line in the log. When some messages of this type were
3626 selected by exigrep, they were listed as "not completed". Others were
3627 picked up by some special patterns. I have improved the selection
3628 criteria to be more general.
3630 PH/38 The host_find_failed option in the manualroute router can now be set
3631 to "ignore", to completely ignore a host whose IP address cannot be
3632 found. If all hosts are ignored, the behaviour is controlled by the new
3633 host_all_ignored option.
3635 PH/39 In a list of hosts for manualroute, if one item (either because of multi-
3636 homing or because of multiple MX records with /mx) generated more than
3637 one IP address, and the following item turned out to be the local host,
3638 all the secondary addresses of the first item were incorrectly removed
3639 from the list, along with the local host and any following hosts (which
3640 is what is supposed to happen).
3642 PH/40 When Exim receives a message, it writes the login name, uid, and gid of
3643 whoever called Exim into the -H file. In the case of the daemon it was
3644 behaving confusingly. When first started, it used values for whoever
3645 started the daemon, but after a SIGHUP it used the Exim user (because it
3646 calls itself on a restart). I have changed the code so that it now always
3649 PH/41 (Following a suggestion from Tony Finch) If all the RCPT commands in a
3650 message are rejected with the same error (e.g. no authentication or bad
3651 sender address), and a DATA command is nevertheless sent (as can happen
3652 with PIPELINING or a stupid MUA), the error message that was given to the
3653 RCPT commands is included in the rejection of the DATA command. This is
3654 intended to be helpful for MUAs that show only the final error to their
3657 PH/42 Another patch from the Sieve maintainer.
3659 SC/02 Eximstats - Differentiate between permanent and temporary rejects.
3660 Eximstats - Fixed some broken HTML links and added missing column headers
3662 Eximstats - Fixed Grand Total Summary Domains, Edomains, and Email
3663 columns for Rejects, Temp Rejects, Ham, and Spam rows.
3665 SC/03 Eximstats - V1.58 Fix to get <> and blackhole to show in edomain tables.
3667 PH/43 Yet another patch from the Sieve maintainer.
3669 PH/44 I found a way to check for a TCP/IP connection going away before sending
3670 the response to the final '.' that terminates a message, but only in the
3671 case where the client has not sent further data following the '.'
3672 (unfortunately, this is allowed). However, in many cases there won't be
3673 any further data because there won't be any more messages to send. A call
3674 to select() can be used: if it shows that the input is "ready", there is
3675 either input waiting, or the socket has been closed. An attempt to read
3676 the next input character can distinguish the two cases. Previously, Exim
3677 would have sent an OK response which the client would never have see.
3678 This could lead to message repetition. This fix should cure that, at
3679 least in a lot of common cases.
3681 PH/45 Do not advertise STARTTLS in response to HELP unless it would be
3682 advertised in response to EHLO.
3688 PH/01 Two more bugs that were introduced by 4.64/PH/07, in addition to the one
3689 fixed by 4.65/MH/01 (is this a record?) are fixed:
3691 (i) An empty string was always treated as zero by the numeric comparison
3692 operators. This behaviour has been restored.
3694 (ii) It is documented that the numeric comparison operators always treat
3695 their arguments as decimal numbers. This was broken in that numbers
3696 starting with 0 were being interpreted as octal.
3698 While fixing these problems I realized that there was another issue that
3699 hadn't been noticed. Values of message_size_limit (both the global option
3700 and the transport option) were treated as octal if they started with 0.
3701 The documentation was vague. These values are now always treated as
3702 decimal, and I will make that clear in the documentation.
3708 TK/01 Disable default definition of HAVE_LINUX_SENDFILE. Clashes with
3709 Linux large file support (_FILE_OFFSET_BITS=64) on older glibc
3712 MH/01 Don't check that the operands of numeric comparison operators are
3713 integers when their expansion is in "skipping" mode (fixes bug
3714 introduced by 4.64-PH/07).
3716 PH/01 If a system filter or a router generates more than SHRT_MAX (32767)
3717 child addresses, Exim now panics and dies. Previously, because the count
3718 is held in a short int, deliveries were likely to be lost. As such a
3719 large number of recipients for a single message is ridiculous
3720 (performance will be very, very poor), I have chosen to impose a limit
3721 rather than extend the field.
3727 TK/01 Bugzilla #401. Fix DK spooling code so that it can overwrite a
3728 leftover -K file (the existence of which was triggered by #402).
3729 While we were at it, introduced process PID as part of the -K
3730 filename. This should rule out race conditions when creating
3733 TK/02 Bugzilla #402. Apply patch from Simon Arlott, speeding up DK signing
3734 processing considerably. Previous code took too long for large mails,
3735 triggering a timeout which in turn triggers #401.
3737 TK/03 Introduced HAVE_LINUX_SENDFILE to os.h-Linux. Currently only used
3738 in the DK code in transports.c. sendfile() is not really portable,
3739 hence the _LINUX specificness.
3741 TF/01 In the add_headers option to the mail command in an Exim filter,
3742 there was a bug that Exim would claim a syntax error in any
3743 header after the first one which had an odd number of characters
3746 PH/01 If a server that rejects MAIL FROM:<> was the target of a sender
3747 callout verification, Exim cached a "reject" for the entire domain. This
3748 is correct for most verifications, but it is not correct for a recipient
3749 verification with use_sender or use_postmaster set, because in that case
3750 the callout does not use MAIL FROM:<>. Exim now distinguishes the special
3751 case of MAIL FROM:<> rejection from other early rejections (e.g.
3752 rejection of HELO). When verifying a recipient using a non-null MAIL
3753 address, the cache is ignored if it shows MAIL FROM:<> rejection.
3754 Whatever the result of the callout, the value of the domain cache is
3755 left unchanged (for any other kind of callout, getting as far as trying
3756 RCPT means that the domain itself is ok).
3758 PH/02 Tidied a number of unused variable and signed/unsigned warnings that
3761 PH/03 On Solaris, an unexpectedly close socket (dropped connection) can
3762 manifest itself as EPIPE rather than ECONNECT. When tidying away a
3763 session, the daemon ignores ECONNECT errors and logs others; it now
3764 ignores EPIPE as well.
3766 PH/04 Applied Nico Erfurth's refactoring patch to tidy up mime.c
3767 (quoted-printable decoding).
3769 PH/05 Applied Nico Erfurth's refactoring patch to tidy up spool_mbox.c, and
3770 later the small subsequent patch to fix an introduced bug.
3772 PH/06 Installed the latest Cygwin Makefile from the Cygwin maintainer.
3774 PH/07 There was no check for overflow in expansions such as ${if >{1}{4096M}}.
3776 PH/08 An error is now given if message_size_limit is specified negative.
3778 PH/09 Applied and tidied up Jakob Hirsch's patch for allowing ACL variables
3779 to be given (somewhat) arbitrary names.
3781 JJ/01 exipick 20060919.0, allow for arbitrary acl_ variables introduced
3784 JJ/02 exipick 20060919.0, --show-vars args can now be regular expressions,
3785 miscellaneous code fixes
3787 PH/10 Added the log_reject_target ACL modifier to specify where to log
3790 PH/11 Callouts were setting the name used for EHLO/HELO from $smtp_active_
3791 hostname. This is wrong, because it relates to the incoming message (and
3792 probably the interface on which it is arriving) and not to the outgoing
3793 callout (which could be using a different interface). This has been
3794 changed to use the value of the helo_data option from the smtp transport
3795 instead - this is what is used when a message is actually being sent. If
3796 there is no remote transport (possible with a router that sets up host
3797 addresses), $smtp_active_hostname is used.
3799 PH/12 Installed Andrey Panin's patch to add a dovecot authenticator. Various
3800 tweaks were necessary in order to get it to work (see also 21 below):
3801 (a) The code assumed that strncpy() returns a negative number on buffer
3802 overflow, which isn't the case. Replaced with Exim's string_format()
3804 (b) There were several signed/unsigned issues. I just did the minimum
3805 hacking in of casts. There is scope for a larger refactoring.
3806 (c) The code used strcasecmp() which is not a standard C function.
3807 Replaced with Exim's strcmpic() function.
3808 (d) The code set only $1; it now sets $auth1 as well.
3809 (e) A simple test gave the error "authentication client didn't specify
3810 service in request". It would seem that Dovecot has changed its
3811 interface. Fortunately there's a specification; I followed it and
3812 changed what the client sends and it appears to be working now.
3814 PH/13 Added $message_headers_raw to provide the headers without RFC 2047
3817 PH/14 Corrected misleading output from -bv when -v was also used. Suppose the
3818 address A is aliased to B and C, where B exists and C does not. Without
3819 -v the output is "A verified" because verification stops after a
3820 successful redirection if more than one address is generated. However,
3821 with -v the child addresses are also verified. Exim was outputting "A
3822 failed to verify" and then showing the successful verification for C,
3823 with its parentage. It now outputs "B failed to verify", showing B's
3824 parentage before showing the successful verification of C.
3826 PH/15 Applied Michael Deutschmann's patch to allow DNS black list processing to
3827 look up a TXT record in a specific list after matching in a combined
3830 PH/16 It seems that the options setting for the resolver (RES_DEFNAMES and
3831 RES_DNSRCH) can affect the behaviour of gethostbyname() and friends when
3832 they consult the DNS. I had assumed they would set it the way they
3833 wanted; and indeed my experiments on Linux seem to show that in some
3834 cases they do (I could influence IPv6 lookups but not IPv4 lookups).
3835 To be on the safe side, however, I have now made the interface to
3836 host_find_byname() similar to host_find_bydns(), with an argument
3837 containing the DNS resolver options. The host_find_byname() function now
3838 sets these options at its start, just as host_find_bydns() does. The smtp
3839 transport options dns_qualify_single and dns_search_parents are passed to
3840 host_find_byname() when gethostbyname=TRUE in this transport. Other uses
3841 of host_find_byname() use the default settings of RES_DEFNAMES
3842 (qualify_single) but not RES_DNSRCH (search_parents).
3844 PH/17 Applied (a modified version of) Nico Erfurth's patch to make
3845 spool_read_header() do less string testing, by means of a preliminary
3846 switch on the second character of optional "-foo" lines. (This is
3847 overdue, caused by the large number of possibilities that now exist.
3848 Originally there were few.) While I was there, I also converted the
3849 str(n)cmp tests so they don't re-test the leading "-" and the first
3850 character, in the hope this might squeeze out yet more improvement.
3852 PH/18 Two problems with "group" syntax in header lines when verifying: (1) The
3853 flag allowing group syntax was set by the header_syntax check but not
3854 turned off, possible causing trouble later; (2) The flag was not being
3855 set at all for the header_verify test, causing "group"-style headers to
3856 be rejected. I have now set it in this case, and also caused header_
3857 verify to ignore an empty address taken from a group. While doing this, I
3858 came across some other cases where the code for allowing group syntax
3859 while scanning a header line wasn't quite right (mostly, not resetting
3860 the flag correctly in the right place). These bugs could have caused
3861 trouble for malformed header lines. I hope it is now all correct.
3863 PH/19 The functions {pwcheck,saslauthd}_verify_password() are always called
3864 with the "reply" argument non-NULL. The code, however (which originally
3865 came from elsewhere) had *some* tests for NULL when it wrote to *reply,
3866 but it didn't always do it. This confused somebody who was copying the
3867 code for some other use. I have removed all the tests.
3869 PH/20 It was discovered that the GnuTLS code had support for RSA_EXPORT, a
3870 feature that was used to support insecure browsers during the U.S. crypto
3871 embargo. It requires special client support, and Exim is probably the
3872 only MTA that supported it -- and would never use it because real RSA is
3873 always available. This code has been removed, because it had the bad
3874 effect of slowing Exim down by computing (never used) parameters for the
3875 RSA_EXPORT functionality.
3877 PH/21 On the advice of Timo Sirainen, added a check to the dovecot
3878 authenticator to fail if there's a tab character in the incoming data
3879 (there should never be unless someone is messing about, as it's supposed
3880 to be base64-encoded). Also added, on Timo's advice, the "secured" option
3881 if the connection is using TLS or if the remote IP is the same as the
3882 local IP, and the "valid-client-cert option" if a client certificate has
3885 PH/22 As suggested by Dennis Davis, added a server_condition option to *all*
3886 authenticators. This can be used for authorization after authentication
3887 succeeds. (In the case of plaintext, it servers for both authentication
3890 PH/23 Testing for tls_required and lost_connection in a retry rule didn't work
3891 if any retry times were supplied.
3893 PH/24 Exim crashed if verify=helo was activated during an incoming -bs
3894 connection, where there is no client IP address to check. In this
3895 situation, the verify now always succeeds.
3897 PH/25 Applied John Jetmore's -Mset patch.
3899 PH/26 Added -bem to be like -Mset, but loading a message from a file.
3901 PH/27 In a string expansion for a processed (not raw) header when multiple
3902 headers of the same name were present, leading whitespace was being
3903 removed from all of them, but trailing whitespace was being removed only
3904 from the last one. Now trailing whitespace is removed from each header
3905 before concatenation. Completely empty headers in a concatenation (as
3906 before) are ignored.
3908 PH/28 Fixed bug in backwards-compatibility feature of PH/09 (thanks to John
3909 Jetmore). It would have mis-read ACL variables from pre-4.61 spool files.
3911 PH/29 [Removed. This was a change that I later backed out, and forgot to
3912 correct the ChangeLog entry (that I had efficiently created) before
3913 committing the later change.]
3915 PH/30 Exim was sometimes attempting to deliver messages that had suffered
3916 address errors (4xx response to RCPT) over the same connection as other
3917 messages routed to the same hosts. Such deliveries are always "forced",
3918 so retry times are not inspected. This resulted in far too many retries
3919 for the affected addresses. The effect occurred only when there were more
3920 hosts than the hosts_max_try setting in the smtp transport when it had
3921 the 4xx errors. Those hosts that it had tried were not added to the list
3922 of hosts for which the message was waiting, so if all were tried, there
3923 was no problem. Two fixes have been applied:
3925 (i) If there are any address or message errors in an SMTP delivery, none
3926 of the hosts (tried or untried) are now added to the list of hosts
3927 for which the message is waiting, so the message should not be a
3928 candidate for sending over the same connection that was used for a
3929 successful delivery of some other message. This seems entirely
3930 reasonable: after all the message is NOT "waiting for some host".
3931 This is so "obvious" that I'm not sure why it wasn't done
3932 previously. Hope I haven't missed anything, but it can't do any
3933 harm, as the worst effect is to miss an optimization.
3935 (ii) If, despite (i), such a delivery is accidentally attempted, the
3936 routing retry time is respected, so at least it doesn't keep
3937 hammering the server.
3939 PH/31 Installed Andrew Findlay's patch to close the writing end of the socket
3940 in ${readsocket because some servers need this prod.
3942 PH/32 Added some extra debug output when updating a wait-xxx database.
3944 PH/33 The hint "could be header name not terminated by colon", which has been
3945 given for certain expansion errors for a long time, was not being given
3946 for the ${if def:h_colon_omitted{... case.
3948 PH/34 The spec says: "With one important exception, whenever a domain list is
3949 being scanned, $domain contains the subject domain." There was at least
3950 one case where this was not true.
3952 PH/35 The error "getsockname() failed: connection reset by peer" was being
3953 written to the panic log as well as the main log, but it isn't really
3954 panic-worthy as it just means the connection died rather early on. I have
3955 removed the panic log writing for the ECONNRESET error when getsockname()
3958 PH/36 After a 4xx response to a RCPT error, that address was delayed (in queue
3959 runs only) independently of the message's sender address. This meant
3960 that, if the 4xx error was in fact related to the sender, a different
3961 message to the same recipient with a different sender could confuse
3962 things. In particular, this can happen when sending to a greylisting
3963 server, but other circumstances could also provoke similar problems.
3964 I have changed the default so that the retry time for these errors is now
3965 based a combination of the sender and recipient addresses. This change
3966 can be overridden by setting address_retry_include_sender=false in the
3969 PH/37 For LMTP over TCP/IP (the smtp transport), error responses from the
3970 remote server are returned as part of bounce messages. This was not
3971 happening for LMTP over a pipe (the lmtp transport), but now it is the
3972 same for both kinds of LMTP.
3974 PH/38 Despite being documented as not happening, Exim was rewriting addresses
3975 in header lines that were in fact CNAMEs. This is no longer the case.
3977 PH/39 If -R or -S was given with -q<time>, the effect of -R or -S was ignored,
3978 and queue runs started by the daemon processed all messages. This has
3979 been fixed so that -R and -S can now usefully be given with -q<time>.
3981 PH/40 Import PCRE release 6.7 (fixes some bugs).
3983 PH/41 Add bitwise logical operations to eval (courtesy Brad Jorsch).
3985 PH/42 Give an error if -q is specified more than once.
3987 PH/43 Renamed the variables $interface_address and $interface_port as
3988 $received_ip_address and $received_port, to make it clear that these
3989 values apply to message reception, and not to the outgoing interface when
3990 a message is delivered. (The old names remain recognized, of course.)
3992 PH/44 There was no timeout on the connect() call when using a Unix domain
3993 socket in the ${readsocket expansion. There now is.
3995 PH/45 Applied a modified version of Brad Jorsch's patch to allow "message" to
3996 be meaningful with "accept".
3998 SC/01 Eximstats V1.43
3999 Bug fix for V1.42 with -h0 specified. Spotted by Chris Lear.
4001 SC/02 Eximstats V1.44
4002 Use a glob alias rather than an array ref in the generated
4003 parser. This improves both readability and performance.
4005 SC/03 Eximstats V1.45 (Marco Gaiarin / Steve Campbell)
4006 Collect SpamAssassin and rejection statistics.
4007 Don't display local sender or destination tables unless
4008 there is data to show.
4009 Added average volumes into the top table text output.
4011 SC/04 Eximstats V1.46
4012 Collect data on the number of addresses (recipients)
4013 as well as the number of messages.
4015 SC/05 Eximstats V1.47
4016 Added 'Message too big' to the list of mail rejection
4017 reasons (thanks to Marco Gaiarin).
4019 SC/06 Eximstats V1.48
4020 Mainlog lines which have GMT offsets and are too short to
4021 have a flag are now skipped.
4023 SC/07 Eximstats V1.49 (Alain Williams)
4024 Added the -emptyok flag.
4026 SC/08 Eximstats V1.50
4027 Fixes for obtaining the IP address from reject messages.
4029 JJ/03 exipick.20061117.2, made header handling as similar to exim as possible
4030 (added [br]h_ prefixes, implemented RFC2047 decoding. Fixed
4031 whitespace changes from 4.64-PH/27
4033 JJ/04 exipick.20061117.2, fixed format and added $message_headers_raw to
4036 JJ/05 exipick.20061117.2, bug fixes (error out sooner when invalid criteria
4037 are found, allow negative numbers in numeric criteria)
4039 JJ/06 exipick.20061117.2, added new $message_body_missing variable
4041 JJ/07 exipick.20061117.2, added $received_ip_address and $received_port
4042 to match changes made in 4.64-PH/43
4044 PH/46 Applied Jori Hamalainen's patch to add features to exiqsumm.
4046 PH/47 Put in an explicit test for a DNS lookup of an address record where the
4047 "domain" is actually an IP address, and force a failure. This locks out
4048 those revolvers/nameservers that support "A-for-A" lookups, in
4049 contravention of the specifications.
4051 PH/48 When a host name was looked up from an IP address, and the subsequent
4052 forward lookup of the name timed out, the host name was left in
4053 $sender_host_name, contrary to the specification.
4055 PH/49 Although default lookup types such as lsearch* or cdb*@ have always been
4056 restricted to single-key lookups, Exim was not diagnosing an error if
4057 * or *@ was used with a query-style lookup.
4059 PH/50 Increased the value of DH_BITS in tls-gnu.c from 768 to 1024.
4061 MH/01 local_scan ABI version incremented to 1.1. It should have been updated
4062 long ago, but noone interested enough thought of it. Let's just say that
4063 the "1.1" means that there are some new functions that weren't there at
4064 some point in the past.
4066 PH/51 Error processing for expansion failure of helo_data from an smtp
4067 transport during callout processing was broken.
4069 PH/52 Applied John Jetmore's patch to allow tls-on-connect and STARTTLS to be
4070 tested/used via the -bh/-bhc/-bs options.
4072 PH/53 Added missing "#include <time.h>" to pcre/pcretest.c (this was a PCRE
4073 bug, fixed in subsequent PCRE releases).
4075 PH/54 Applied Robert Bannocks' patch to avoid a problem with references that
4076 arises when using the Solaris LDAP libraries (but not with OpenLDAP).
4078 PH/55 Check for a ridiculously long file name in exim_dbmbuild.
4084 SC/01 Use a glob alias rather than an array ref in eximstats generated
4085 parser. This improves both readability and performance.
4087 SC/02 Collect SpamAssassin and rejection statistics in eximstats.
4088 Don't display local sender or destination tables in eximstats unless
4089 there is data to show.
4090 Added average volumes into the eximstats top table text output.
4092 SC/03 Collect data on the number of addresses (recipients) as well
4093 as the number of messages in eximstats.
4095 TF/01 Correct an error in the documentation for the redirect router. Exim
4096 does (usually) call initgroups() when daemonizing.
4098 TF/02 Call initgroups() when dropping privilege in exim.c, so that Exim runs
4099 with consistent privilege compared to when running as a daemon.
4101 TF/03 Note in the spec that $authenticated_id is not set for local
4102 submissions from trusted users.
4104 TF/04 The ratelimit per_rcpt option now works correctly in acl_not_smtp.
4105 Thanks to Dean Brooks <dean@iglou.com> for the patch.
4107 TF/05 Make it easier to get SMTP authentication and TLS/SSL support working
4108 by adding some example configuration directives to the default
4109 configuration file. A little bit of work is required to uncomment the
4110 directives and define how usernames and passwords are checked, but
4111 there is now a framework to start from.
4113 PH/01 Added #define LDAP_DEPRECATED 1 to ldap.c because some of the "old"
4114 functions that Exim currently uses aren't defined in ldap.h for OpenLDAP
4115 without this. I don't know how relevant this is to other LDAP libraries.
4117 PH/02 Add the verb name to the "unknown ACL verb" error.
4119 PH/03 Magnus Holmgren's patch for filter_prepend_home.
4121 PH/03 Fixed Bugzilla #101: macro definition between ACLs doesn't work.
4123 PH/04 Applied Magnus Holmgren's patch to fix Bugzilla #98: transport's home
4124 directory not expanded when it should be if an expanded home directory
4125 was set for the address (which is overridden by the transport).
4127 PH/05 Applied Alex Kiernan's patch to fix Bugzilla #99: a problem with
4130 PH/06 Added acl_not_smtp_start, based on Johannes Berg's patch, and set the
4131 bit to forbid control=suppress_local_fixups in the acl_not_smtp ACL,
4132 because it is too late at that time, and has no effect.
4134 PH/07 Changed ${quote_pgsql to quote ' as '' instead of \' because of a
4135 security issue with \' (bugzilla #107). I could not use the
4136 PQescapeStringConn() function, because it needs a PGconn value as one of
4139 PH/08 When testing addresses using -bt, indicate those final addresses that
4140 are duplicates that would not cause an additional delivery. At least one
4141 person was confused, thinking that -bt output corresponded to deliveries.
4142 (Suppressing duplicates isn't a good idea as you lose the information
4143 about possibly different redirections that led to the duplicates.)
4145 PH/09 Applied patch from Erik to use select() instead of poll() in spam.c on
4146 systems where poll() doesn't work, in particular OS X.
4148 PH/10 Added more information to debugging output for retry time not reached.
4150 PH/11 Applied patch from Arkadiusz Miskiewicz to apply a timeout to read
4151 operations in malware.c.
4153 PH/12 Applied patch from Magnus Holmgren to include the "h" tag in Domain Keys
4156 PH/13 If write_rejectlog was set false when logging was sent to syslog with
4157 syslog_duplication set false, log lines that would normally be written
4158 both the the main log and to the reject log were not written to syslog at
4161 PH/14 In the default configuration, change the use of "message" in ACL warn
4162 statements to "add_header".
4164 PH/15 Diagnose a filter syntax error for "seen", "unseen", or "noerror" if not
4165 not followed by a command (e.g. "seen endif").
4167 PH/16 Recognize SMTP codes at the start of "message" in ACLs and after :fail:
4168 and :defer: in a redirect router. Add forbid_smtp_code to suppress the
4171 PH/17 Added extra conditions to the default value of delay_warning_condition
4175 { !eq{$h_list-id:$h_list-post:$h_list-subscribe:}{} } \
4176 { match{$h_precedence:}{(?i)bulk|list|junk} } \
4177 { match{$h_auto-submitted:}{(?i)auto-generated|auto-replied} } \
4180 The Auto-Submitted: and various List- headers are standardised, whereas I
4181 don't think Precedence: ever was.
4183 PH/18 Refactored debugging code in route_finduser() to show more information,
4184 in particular, the error code if getpwnam() issues one.
4186 PH/19 Added PQsetClientEncoding(conn, "SQL_ASCII") to the pgsql code module.
4187 This is apparently needed in addition to the PH/07 change above to avoid
4188 any possible encoding problems.
4190 PH/20 Perl can change the locale. Exim was resetting it after a ${perl call,
4191 but not after initializing Perl.
4193 PH/21 Added a call to PQsetNoticeProcessor() to catch pgsql "notices" and
4194 output them only if debugging. By default they are written stderr,
4195 apparently, which is not desirable.
4197 PH/22 Added Alain Williams' LDAP patch to support setting REFERRALS=off on
4200 JJ/01 exipick: added --reverse (and -R synonym), --random, --size, --sort and
4203 JJ/02 exipick: rewrote --help documentation to hopefully make more clear.
4205 PH/23 Made -oMaa and -oMt work with -bh and -bs to pretend the connection is
4206 authenticated or an ident call has been made. Suppress the default
4207 values for $authenticated_id and $authenticated_sender (but permit -oMai
4208 and -oMas) when testing with -bh.
4210 PH/24 Re-jigged the order of the tests in the default configuration so that the
4211 tests for valid domains and recipients precede the DNS black list and CSA
4212 tests, on the grounds that those ones are more expensive.
4214 PH/25 Exim was not testing for a space following SMTP commands such as EHLO
4215 that require one. Thus, EHLORHUBARB was interpreted as a valid command.
4216 This bug exists in every version of Exim that I still have, right back to
4219 PH/26 (n)wildlsearch lookups are documented as being done case-insensitively.
4220 However, an attempt to turn on case-sensitivity in a regex key by
4221 including (?-i) didn't work because the subject string was already
4222 lowercased, and the effects were non-intuitive. It turns out that a
4223 one-line patch can be used to allow (?-i) to work as expected.
4229 TF/01 Fix the add_header change below (4.61 PH/55) which had a bug that (amongst
4230 other effects) broke the use of negated acl sub-conditions.
4232 PH/01 ${readsocket now supports Internet domain sockets (modified John Jetmore
4235 PH/02 When tcp-wrappers is called from Exim, it returns only "deny" or "allow".
4236 "Deny" causes Exim to reject the incoming connection with a 554 error.
4237 Unfortunately, if there is a major crisis, such as a disk failure,
4238 tcp-wrappers gives "deny", whereas what one would like would be some
4239 kind of temporary error. A kludge has been added to help with this.
4240 Before calling hosts_ctl(), errno is set zero. If the result is "deny", a
4241 554 error is used if errno is still zero or contains ENOENT (which occurs
4242 if either of the /etc/hosts.{allow,deny} files is missing). Otherwise, a
4245 PH/03 Add -lutil to the default FreeBSD LIBS setting.
4247 PH/04 Change PH/19 for 4.61 was too wide. It should not be applied to host
4248 errors. Otherwise a message that provokes a temporary error (when other
4249 messages do not) can cause a whole host to time out.
4251 PH/05 Batch deliveries by appendfile and pipe transports did not work when the
4252 addresses were routed directly to files or pipes from a redirect router.
4253 File deliveries just didn't batch; pipe deliveries might have suffered
4256 PH/06 A failure to get a lock for a hints database would erroneously always say
4257 "Failed to get write lock", even when it was really a read lock.
4259 PH/07 The appendfile transport was creating MBX lock files with a fixed mode
4260 of 0600. This has been changed to use the value of the lockfile_mode
4261 option (which defaults to 0600).
4263 PH/08 Applied small patch from the Sieve maintainer.
4265 PH/09 If maildir_quota_directory_regex was set to exclude (say) the .Trash
4266 folder from quota calculations, a direct delivery into this folder messed
4267 up the contents of the maildirsize file. This was because the regex was
4268 used only to exclude .Trash (or whatever) when the size of the mailbox
4269 was calculated. There was no check that a delivery was happening into an
4270 excluded directory. This bug has been fixed by ignoring all quota
4271 processing for deliveries into excluded directories.
4273 PH/10 Added the maildirfolder_create_regex option to appendfile.
4279 PH/01 The code for finding all the local interface addresses on a FreeBSD
4280 system running IPv6 was broken. This may well have applied to all BSD
4281 systems, as well as to others that have similar system calls. The broken
4282 code found IPv4 interfaces correctly, but gave incorrect values for the
4283 IPv6 interfaces. In particular, ::1 was not found. The effect in Exim was
4284 that it would not match correctly against @[] and not recognize the IPv6
4287 PH/02 The ipliteral router was not recognizing addresses of the form user@
4288 [ipv6:....] because it didn't know about the "ipv6:" prefix.
4290 PH/03 Added disable_ipv6.
4292 PH/04 Changed $reply_address to use the raw form of the headers instead of the
4293 decoded form, because it is most often used to construct To: headers
4294 lines in autoreplies, and the decoded form may well be syntactically
4295 invalid. However, $reply_address has leading white space removed, and all
4296 newlines turned into spaces so that the autoreply transport does not
4299 PH/05 If group was specified without a user on a router, and no group or user
4300 was specified on a transport, the group from the router was ignored.
4302 PH/06 Increased the number of ACL variables to 20 of each type, and arranged
4303 for visible compile-time settings that can be used to change these
4304 numbers, for those that want even more. Backwards compatibility with old
4305 spool files has been maintained. However, going back to a previous Exim
4306 release will lost any variables that are in spool files.
4308 PH/07 Two small changes when running in the test harness: increase delay when
4309 passing a TCP/IP connection to a new process, in case the original
4310 process has to generate a bounce, and remove special handling of
4311 127.0.0.2 (sic), which is no longer necessary.
4313 PH/08 Changed debug output of dbfn_open() flags from numbers to names, so as to
4314 be the same on different OS.
4316 PH/09 Moved a debug statement in filter processing to avoid a race problem when
4319 JJ/01 exipick: fixed bug where -b (brief) output option showed "Vars:"
4320 whether --show-vars was specified or not
4322 JJ/02 exipick: Added support for new ACL variable spool format introduced
4325 PH/10 Fixed another bug related to PH/04 above: if an incoming message had a
4326 syntactically invalid From: or Reply-to: line, and a filter used this to
4327 generate an autoreply, and therefore failed to obtain an address for the
4328 autoreply, Exim could try to deliver to a non-existent relative file
4329 name, causing unrelated and misleading errors. What now happens is that
4330 it logs this as a hard delivery error, but does not attempt to create a
4333 PH/11 The exinext utility has a -C option for testing purposes, but although
4334 the given file was scanned by exinext itself; it wasn't being passed on
4335 when Exim was called.
4337 PH/12 In the smtp transport, treat an explicit ECONNRESET error the same as
4338 an end-of-file indication when reading a command response.
4340 PH/13 Domain literals for IPv6 were not recognized unless IPv6 support was
4341 compiled. In many other places in Exim, IPv6 addresses are always
4342 recognized, so I have changed this. It also means that IPv4 domain
4343 literals of the form [IPV4:n.n.n.n] are now always recognized.
4345 PH/14 When a uid/gid is specified for the queryprogram router, it cannot be
4346 used if the router is not running as root, for example, when verifying at
4347 ACL time, or when using -bh. The debugging output from this situation was
4348 non-existent - all you got was a failure to exec. I have made two
4351 (a) Failures to set uid/gid, the current directory, or a process leader
4352 in a subprocess such as that created by queryprogram now generate
4353 suitable debugging output when -d is set.
4355 (b) The queryprogram router detects when it is not running as root,
4356 outputs suitable debugging information if -d is set, and then runs
4357 the subprocess without attempting to change uid/gid.
4359 PH/15 Minor change to Makefile for building test_host (undocumented testing
4362 PH/16 As discussed on the list in Nov/Dec: Exim no longer looks at the
4363 additional section of a DNS packet that returns MX or SRV records.
4364 Instead, it always explicitly searches for A/AAAA records. This avoids
4365 major problems that occur when a DNS server includes only records of one
4366 type (A or AAAA) in an MX/SRV packet. A byproduct of this change has
4367 fixed another bug: if SRV records were looked up and the corresponding
4368 address records were *not* found in the additional section, the port
4369 values from the SRV records were lost.
4371 PH/17 If a delivery to a pipe, file, or autoreply was deferred, Exim was not
4372 using the correct key (the original address) when searching the retry
4373 rules in order to find which one to use for generating the retry hint.
4375 PH/18 If quota_warn_message contains a From: header, Exim now refrains from
4376 adding the default one. Similarly, if it contains a Reply-To: header, the
4377 errors_reply_to option, if set, is not used.
4379 PH/19 When calculating a retry time, Exim used to measure the "time since
4380 failure" by looking at the "first failed" field in the retry record. Now
4381 it does not use this if it is later than than the arrival time of the
4382 message. Instead it uses the arrival time. This makes for better
4383 behaviour in cases where some deliveries succeed, thus re-setting the
4384 "first failed" field. An example is a quota failure for a huge message
4385 when small messages continue to be delivered. Without this change, the
4386 "time since failure" will always be short, possible causing more frequent
4387 delivery attempts for the huge message than are intended.
4388 [Note: This change was subsequently modified - see PH/04 for 4.62.]
4390 PH/20 Added $auth1, $auth2, $auth3 to contain authentication data (as well as
4391 $1, $2, $3) because the numerical variables can be reset during some
4392 expansion items (e.g. "match"), thereby losing the authentication data.
4394 PH/21 Make -bV show the size of off_t variables so that the test suite can
4395 decide whether to run tests for quotas > 2G.
4397 PH/22 Test the values given for quota, quota_filecount, quota_warn_threshold,
4398 mailbox_size, and mailbox_filecount in the appendfile transport. If a
4399 filecount value is greater than 2G or if a quota value is greater than 2G
4400 on a system where the size of off_t is not greater than 4, a panic error
4403 PH/23 When a malformed item such as 1.2.3/24 appears in a host list, it can
4404 never match. The debug and -bh output now contains an explicit error
4405 message indicating a malformed IPv4 address or mask.
4407 PH/24 An host item such as 1.2.3.4/abc was being treated as the IP address
4408 1.2.3.4 without a mask. Now it is not recognized as an IP address, and
4409 PH/23 above applies.
4411 PH/25 Do not write to syslog when running in the test harness. The only
4412 occasion when this arises is a failure to open the main or panic logs
4413 (for which there is an explicit test).
4415 PH/26 Added the /no_tell option to "control=freeze".
4417 PH/27 If a host name lookup failed very early in a connection, for example, if
4418 the IP address matched host_lookup and the reverse lookup yielded a name
4419 that did not have a forward lookup, an error message of the form "no IP
4420 address found for host xxx.xxx.xxx (during SMTP connection from NULL)"
4421 could be logged. Now it outputs the IP address instead of "NULL".
4423 PH/28 An enabling patch from MH: add new function child_open_exim2() which
4424 allows the sender and the authenticated sender to be set when
4425 submitting a message from within Exim. Since child_open_exim() is
4426 documented for local_scan(), the new function should be too.
4428 PH/29 In GnuTLS, a forced expansion failure for tls_privatekey was not being
4429 ignored. In both GnuTLS and OpenSSL, an expansion of tls_privatekey that
4430 results in an empty string is now treated as unset.
4432 PH/30 Fix eximon buffer overflow bug (Bugzilla #73).
4434 PH/31 Added sender_verify_fail logging option.
4436 PH/32 In November 2003, the code in Exim that added an empty Bcc: header when
4437 needed by RFC 822 but not by RFC 2822 was commented out. I have now
4438 tidied the source and removed it altogether.
4440 PH/33 When a queue run was abandoned because the load average was too high, a
4441 log line was always written; now it is written only if the queue_run log
4442 selector is set. In addition, the log line for abandonment now contains
4443 information about the queue run such as the pid. This is always present
4444 in "start" and "stop" lines but was omitted from the "abandon" line.
4446 PH/34 Omit spaces between a header name and the colon in the error message that
4447 is given when verify = headers_syntax fails (if there are lots of them,
4448 the message gets confusing).
4450 PH/35 Change the default for dns_check_names_pattern to allow slashes within
4451 names, as there are now some PTR records that contain slashes. This check
4452 is only to protect against broken name servers that fall over on strange
4453 characters, so the fact that it applies to all lookups doesn't matter.
4455 PH/36 Now that the new test suite is complete, we can remove some of the
4456 special code in Exim that was needed for the old test suite. For example,
4457 sorting DNS records because real resolvers return them in an arbitrary
4458 order. The new test suite's fake resolver always returns records in the
4461 PH/37 When running in the test harness, use -odi for submitted messages (e.g.
4462 bounces) except when queue_only is set, to avoid logging races between
4463 the different processes.
4465 PH/38 Panic-die if .include specifies a non-absolute path.
4467 PH/39 A tweak to the "H" retry rule from its user.
4469 JJ/03 exipick: Removed parentheses from 'next' and 'last' calls that specified
4470 a label. They prevented compilation on older perls.
4472 JJ/04 exipick: Refactored code to prevent implicit split to @_ which caused
4473 a warning to be raised on newish perls.
4475 JJ/05 exipick: Fixed bug where -bpc always showed a count of all messages
4476 on queue. Changes to match documented behaviour of showing count of
4477 messages matching specified criteria.
4479 PH/40 Changed the default ident timeout from 30s to 5s.
4481 PH/41 Added support for the use of login_cap features, on those BSD systems
4482 that have them, for controlling the resources used by pipe deliveries.
4484 PH/42 The content-scanning code uses fopen() to create files in which to put
4485 message data. Previously it was not paying any attention to the mode of
4486 the files. Exim runs with umask(0) because the rest of the code creates
4487 files with open(), and sets the required mode explicitly. Thus, these
4488 files were ending up world-writeable. This was not a big issue, because,
4489 being within the spool directory, they were not world-accessible. I have
4490 created a function called modefopen, which takes an additional mode
4491 argument. It sets umask(777), creates the file, chmods it to the required
4492 mode, then resets the umask. All the relevant calls to fopen() in the
4493 content scanning code have been changed to use this function.
4495 PH/43 If retry_interval_max is set greater than 24 hours, it is quietly reset
4496 to 24 hours. This avoids potential overflow problems when processing G
4497 and H retry rules. I suspect nobody ever tinkers with this value.
4499 PH/44 Added STRIP_COMMAND=/usr/bin/strip to the FreeBSD Makefile.
4501 PH/45 When the plaintext authenticator is running as a client, the server's
4502 challenges are checked to ensure they are valid base64 strings. By
4503 default, the authentication attempt is cancelled if an invalid string is
4504 received. Setting client_ignore_invalid_base64 true ignores these errors.
4505 The decoded challenge strings are now placed in $auth1, $auth2, etc. as
4506 they are received. Thus, the responses can be made to depend on the
4507 challenges. If an invalid string is ignored, an empty string is placed in
4510 PH/46 Messages that are created by the autoreply transport now contains a
4511 References: header, in accordance with RFCs 2822 and 3834.
4513 PH/47 Added authenticated_sender_force to the smtp transport.
4515 PH/48 The ${prvs expansion was broken on systems where time_t was long long.
4517 PH/49 Installed latest patch from the Sieve maintainer.
4519 PH/50 When an Exim quota was set without a file count quota, and mailbox_size
4520 was also set, the appendfile transport was unnecessarily scanning a
4521 directory of message files (e.g. for maildir delivery) to find the count
4522 of files (along with the size), even though it did not need this
4523 information. It now does the scan only if it needs to find either the
4524 size of the count of files.
4526 PH/51 Added ${time_eval: to convert Exim time strings into seconds.
4528 PH/52 Two bugs concerned with error handling when the smtp transport is
4531 (i) Exim was not creating retry information for temporary errors given
4532 for individual recipients after the DATA command when the smtp transport
4533 was used in LMTP mode. This meant that they could be retried too
4534 frequently, and not timed out correctly.
4536 (ii) Exim was setting the flag that allows error details to be returned
4537 for LMTP errors on RCPT commands, but not for LMTP errors for individual
4538 recipients that were returned after the DATA command.
4540 PH/53 This is related to PH/52, but is more general: for any failing address,
4541 when detailed error information was permitted to be returned to the
4542 sender, but the error was temporary, then after the final timeout, only
4543 "retry timeout exceeded" was returned. Now it returns the full error as
4544 well as "retry timeout exceeded".
4546 PH/54 Added control=allow_auth_unadvertised, as it seems there are clients that
4547 do this, and (what is worse) MTAs that accept it.
4549 PH/55 Added the add_header modified to ACLs. The use of "message" with "warn"
4550 will now be deprecated.
4552 PH/56 New os.c-cygwin from the Cygwin maintainer.
4554 JJ/06 exipick: added --unsorted option to allow unsorted output in all output
4555 formats (previously only available in exim formats via -bpr, -bpru,
4556 and -bpra. Now also available in native and exiqgrep formats)
4558 JJ/07 exipick: added --freeze and --thaw options to allow faster interaction
4559 with very large, slow to parse queues
4561 JJ/08 exipick: added ! as generic prefix to negate any criteria format
4563 JJ/09 exipick: miscellaneous performance enhancements (~24% improvements)
4565 PH/57 Tidies in SMTP dialogue display in debug output: (i) It was not showing
4566 responses to authentication challenges, though it was showing the
4567 challenges; (ii) I've removed the CR characters from the debug output for
4570 PH/58 Allow for the insertion of a newline as well as a space when a string
4571 is turned into more than one encoded-word during RFC 2047 encoding. The
4572 Sieve code now uses this.
4574 PH/59 Added the following errors that can be detected in retry rules: mail_4xx,
4575 data_4xx, lost_connection, tls_required.
4577 PH/60 When a VRFY deferred or FAILED, the log message rather than the user
4578 message was being sent as an SMTP response.
4580 PH/61 Add -l and -k options to exicyclog.
4582 PH/62 When verifying, if an address was redirected to one new address, so that
4583 verification continued, and the new address failed or deferred after
4584 having set something in $address_data, the value of $address_data was not
4585 passed back to the ACL. This was different to the case when no
4586 redirection occurred. The value is now passed back in both cases.
4588 PH/63 Changed the macro HAVE_LOGIN_CAP (see PH/41 for this release above) to
4589 HAVE_SETCLASSRESOURCES because there are different APIs in use that all
4590 use login_cap.h, so on its own it isn't the distinguishing feature. The
4591 new name refers directly to the setclassresources() function.
4593 PH/65 Added configuration files for NetBSD3.
4595 PH/66 Updated OS/Makefile-HP-UX for gcc 4.1.0 with HP-UX 11.
4597 PH/67 Fixed minor infelicity in the sorting of addresses to ensure that IPv6
4598 is preferred over IPv4.
4600 PH/68 The bounce_return_message and bounce_return_body options were not being
4601 honoured for bounces generated during the reception of non-SMTP messages.
4602 In particular, this applied to messages rejected by the ACL. This bug has
4603 been fixed. However, if bounce_return_message is true and bounce_return_
4604 body is false, the headers that are returned for a non-SMTP message
4605 include only those that have been read before the error was detected.
4606 (In the case of an ACL rejection, they have all been read.)
4608 PH/69 The HTML version of the specification is now built in a directory called
4609 spec_html instead of spec.html, because the latter looks like a path with
4610 a MIME-type, and this confuses some software.
4612 PH/70 Catch two compiler warnings in sieve.c.
4614 PH/71 Fixed an obscure and subtle bug (thanks Alexander & Matthias). The
4615 function verify_get_ident() calls ip_connect() to connect a socket, but
4616 if the "connect()" function timed out, ip_connect() used to close the
4617 socket. However, verify_get_ident() also closes the socket later, and in
4618 between Exim writes to the log, which may get opened at this point. When
4619 the socket was closed in ip_connect(), the log could get the same file
4620 descriptor number as the socket. This naturally causes chaos. The fix is
4621 not to close the socket in ip_connect(); the socket should be closed by
4622 the function that creates it. There was only one place in the code where
4623 this was missing, in the iplookup router, which I don't think anybody now
4624 uses, but I've fixed it anyway.
4626 PH/72 Make dns_again_means_nonexist apply to lookups using gethostbyname() as
4627 well as to direct DNS lookups. Otherwise the handling of names in host
4628 lists is inconsistent and therefore confusing.
4634 PH/01 Two changes to the default runtime configuration:
4636 (1) Move the checks for relay_from_hosts and authenticated clients from
4637 after to before the (commented out) DNS black list checks.
4639 (2) Add control=submission to the relay_from_hosts and authenticated
4640 clients checks, on the grounds that messages accepted by these
4641 statements are most likely to be submissions.
4643 PH/02 Several tidies to the handling of ${prvs and ${prvscheck:
4645 (1) Generate an error if the third argument for the ${prvs expansion is
4648 (2) Treat a missing third argument of ${prvscheck as if it were an empty
4651 (3) Reset the variables that are obtained from the first argument of
4652 ${prvscheck and used in the second argument before leaving the code,
4653 because their memory is reclaimed, so using them afterwards may do
4656 (4) Tidy up the code for expanding the arguments of ${prvscheck one by
4657 one (it's much easier than Tom thought :-).
4659 (5) Because of (4), we can now allow for the use of $prvscheck_result
4660 inside the third argument.
4662 PH/03 For some reason, the default setting of PATH when running a command from
4663 a pipe transport was just "/usr/bin". I have changed it to
4666 PH/04 SUPPORT_TRANSLATE_IP_ADDRESS and MOVE_FROZEN_MESSAGES did not cause
4667 anything to be listed in the output from -bV.
4669 PH/05 When a filter generated an autoreply, the entire To: header line was
4670 quoted in the delivery log line, like this:
4672 => >A.N.Other <ano@some.domain> <original@ddress> ...
4674 This has been changed so that it extracts the operative address. There
4675 may be more than one such address. If so, they are comma-separated, like
4678 => >ano@some.domain,ona@other.domain <original@ddress> ...
4680 PH/06 When a client host used a correct literal IP address in a HELO or EHLO
4681 command, (for example, EHLO [1.2.3.4]) and the client's IP address was
4682 not being looked up in the rDNS to get a host name, Exim was showing the
4683 IP address twice in Received: lines, even though the IP addresses were
4684 identical. For example:
4686 Received: from [1.2.3.4] (helo=[1.2.3.4])
4688 However, if the real host name was known, it was omitting the HELO data
4689 if it matched the actual IP address. This has been tidied up so that it
4690 doesn't show the same IP address twice.
4692 PH/07 When both +timestamp and +memory debugging was on, the value given by
4693 $tod_xxx expansions could be wrong, because the tod_stamp() function was
4694 called by the debug printing, thereby overwriting the timestamp buffer.
4695 Debugging no longer uses the tod_stamp() function when +timestamp is set.
4697 PH/08 When the original message was included in an autoreply transport, it
4698 always said "this is a copy of the message, including all the headers",
4699 even if body_only or headers_only was set. It now gives an appropriate
4702 PH/09 Applied a patch from the Sieve maintainer which:
4704 o fixes some comments
4705 o adds the (disabled) notify extension core
4706 o adds some debug output for the result of if/elsif tests
4707 o points to the current vacation draft in the documentation
4708 and documents the missing references header update
4712 o fixes a bug in processing the envelope test (when testing
4713 multiple envelope elements, the last element determined the
4716 PH/10 Exim was violating RFC 3834 ("Recommendations for Automatic Responses to
4717 Electronic Mail") by including:
4719 Auto-submitted: auto-generated
4721 in the messages that it generates (bounce messages and others, such as
4722 warnings). In the case of bounce messages for non-SMTP messages, there was
4723 also a typo: it was using "Auto_submitted" (underscore instead of
4724 hyphen). Since every message generated by Exim is necessarily in response
4725 to another message, thes have all been changed to:
4727 Auto-Submitted: auto-replied
4729 in accordance with these statements in the RFC:
4731 The auto-replied keyword:
4733 - SHOULD be used on messages sent in direct response to another
4734 message by an automatic process,
4736 - MUST NOT be used on manually-generated messages,
4738 - MAY be used on Delivery Status Notifications (DSNs) and Message
4739 Disposition Notifications (MDNs),
4741 - MUST NOT be used on messages generated by automatic or periodic
4742 processes, except for messages which are automatic responses to
4745 PH/11 Added "${if def:sender_address {(envelope-from <$sender_address>)\n\t}}"
4746 to the default Received: header definition.
4748 PH/12 Added log selector acl_warn_skipped (default on).
4750 PH/13 After a successful wildlsearch lookup, discard the values of numeric
4751 variables because (a) they are in the wrong storage pool and (b) even if
4752 they were copied, it wouldn't work properly because of the caching.
4754 PH/14 Add check_rfc2047_length to disable enforcement of RFC 2047 length
4755 checking when decoding. Apparently there are clients that generate
4756 overlong encoded strings. Why am I not surprised?
4758 PH/15 If the first argument of "${if match_address" was not empty, but did not
4759 contain an "@" character, Exim crashed. Now it writes a panic log message
4760 and treats the condition as false.
4762 PH/16 In autoreply, treat an empty string for "once" the same as unset.
4764 PH/17 A further patch from the Sieve maintainer: "Introduce the new Sieve
4765 extension "envelope-auth". The code is finished and in agreement with
4766 other implementations, but there is no documentation so far and in fact,
4767 nobody wrote the draft yet. This extension is currently #undef'ed, thus
4768 not changing the active code.
4770 Print executed "if" and "elsif" statements when debugging is used. This
4771 helps a great deal to understand what a filter does.
4773 Document more things not specified clearly in RFC3028. I had all this
4774 sorted out, when out of a sudden new issues came to my mind. Oops."
4776 PH/18 Exim was not recognizing the "net-" search type prefix in match_ip lists
4779 PH/19 Exim expands the IPv6 address given to -bh to its full non-abbreviated
4780 canonical form (as documented). However, after a host name lookup from
4781 the IP address, check_host() was doing a simple string comparison with
4782 addresses acquired from the DNS when checking that the found name did
4783 have the original IP as one of its addresses. Since any found IPv6
4784 addresses are likely to be in abbreviated form, the comparison could
4785 fail. Luckily, there already exists a function for doing the comparison
4786 by converting both addresses to binary, so now that is used instead of
4787 the text comparison.
4789 PH/20 There was another similar case to PH/19, when a complete host name was
4790 given in a host list; looking up its IP address could give an abbreviated
4791 form, whereas the current host's name might or might not be abbreviated.
4792 The same fix has been applied.
4798 PH/01 The ${base62: operator adjusted itself to base 36 when BASE_62 was
4799 set to 36 (for Darwin and Cygwin), but the ${base62d: operator did not.
4802 PH/02 Two minor problems detected in Cygwin: the os.{c,h} files had lost */ on
4803 the CVS lines, and there was a missing #if HAVE_IPV6 in host.c.
4805 PH/03 Typo: missing ".o" in src/pcre/Makefile.
4807 PH/04 Tighten up "personal" tests: Instead of testing for any "List-"
4808 header line, restrict the check to what is listed in RFCs 2369 and 2929.
4809 Also, for "Auto-Submitted", treat anything other than "no" as
4810 non-personal, in accordance with RFC 3834. (Previously it treated
4811 anything starting "auto-" as non-personal.)
4813 TF/01 The control=submission/name=... option had a problem with syntax
4814 errors if the name included a slash character. The /name= option
4815 now slurps the rest of the string, so it can include any characters
4816 but it must come last in the list of options (after /sender_retain
4819 PH/05 Some modifications to the interface to the fake nameserver for the new
4827 TK/01 Added the "success_on_redirect" address verification option. See
4828 NewStuff for rationale and an example.
4830 PH/01 Added support for SQLite, basic code supplied by David Woodhouse.
4832 PH/02 Patch to exigrep to allow it to work on syslog lines.
4834 PH/03 When creating an mbox file for a virus/spam scan, use fseek() instead of
4835 fread() to skip over the body file's header line, because in Cygwin the
4836 header line is locked and is inaccessible.
4838 PH/04 Added $message_exim_id, ultimately to replace $message_id (they will both
4839 co-exist for some time) to make it clear that it is the Exim ID that is
4840 referenced, not the Message-ID: header line.
4842 PH/05 Replaced all Tom's calls to snprintf() with calls to the internal
4843 string_format() function, because snprintf() does not exist on all
4846 PH/06 The use of forbid_filter_existstest now also locks out the use of the
4847 ${stat: expansion item.
4849 PH/07 Changed "SMTP protocol violation: synchronization error" into "SMTP
4850 protocol synchronization error", to keep the pedants happy.
4852 PH/08 Arrange for USE_INET_NTOA_FIX to be set in config.h for AIX systems as
4853 well as for IRIX systems, when gcc is being used. See the host.c source
4856 PH/09 Installed latest Cygwin configuration files from the Cygwin maintainer.
4858 PH/10 Named domain lists were not working if used in a queue_smtp_domains
4861 PH/11 Added support for the IGNOREQUOTA extension to LMTP, both to the lmtp
4862 transport and to the smtp transport in LMTP mode.
4864 TK/02 Remove one case of BASE64 error detection FTTB (undocumented anyway).
4866 PH/12 There was a missing call to search_tidyup() before the fork() in rda.c to
4867 run a filter in a subprocess. This could lead to confusion in subsequent
4868 lookups in the parent process. There should also be a search_tidyup() at
4869 the end of the subprocess.
4871 PH/13 Previously, if "verify = helo" was set in an ACL, the condition was true
4872 only if the host matched helo_try_verify_hosts, which caused the
4873 verification to occur when the EHLO/HELO command was issued. The ACL just
4874 tested the remembered result. Now, if a previous verification attempt has
4875 not happened, "verify = helo" does it there and then.
4877 JJ/01 exipick: added $message_exim_id variable (see 4.53-PH/04)
4879 TK/03 Fix log output including CR from clamd.
4881 PH/14 A reference to $reply_address when Reply-to: was empty and From: did not
4882 exist provoked a memory error which could cause a segfault.
4884 PH/15 Installed PCRE 6.2
4886 PH/17 Defined BIND_8_COMPAT in the Darwin os.h file.
4888 PH/18 Reversed 4.52/PH/17 because the HP-UX user found it wasn't the cause
4889 of the problem. Specifically, suggested +O2 rather than +O1 for the
4892 PH/19 Added sqlite_lock_timeout option (David Woodhouse's patch).
4894 PH/20 If a delivery was routed to a non-standard port by means of an SRV
4895 record, the port was not correctly logged when the outgoing_port log
4896 selector was set (it logged the transort's default port).
4898 PH/21 Added support for host-specific ports to manualroute, queryprogram,
4899 fallback_hosts, and "hosts" in the smtp transport.
4901 PH/22 If the log selector "outgoing_port" is set, the port is now also given on
4902 host errors such as "Connection refused".
4904 PH/23 Applied a patch to fix problems with exim-4.52 while doing radius
4905 authentication with radiusclient 0.4.9:
4907 - Error returned from rc_read_config was caught wrongly
4908 - Username/password not passed on to radius server due to wrong length.
4910 The presumption is that some radiusclient API changes for 4.51/PH/17
4911 were not taken care of correctly. The code is still untested by me (my
4912 Linux distribution still has 0.3.2 of radiusclient), but it was
4913 contributed by a Radius user.
4915 PH/24 When doing a callout, the value of $domain wasn't set correctly when
4916 expanding the "port" option of the smtp transport.
4918 TK/04 MIME ACL: Fix buffer underrun that occurs when EOF condition is met
4919 while reading a MIME header. Thanks to Tom Hughes for a patch.
4921 PH/24 Include config.h inside local_scan.h so that configuration settings are
4924 PH/25 Make $smtp_command_argument available after all SMTP commands. This means
4925 that in an ACL for RCPT (for example), you can examine exactly what was
4928 PH/26 Exim was recognizing IPv6 addresses of the form [IPv6:....] in EHLO
4929 commands, but it was not correctly comparing the address with the actual
4930 client host address. Thus, it would show the EHLO address in Received:
4931 header lines when this was not necessary.
4933 PH/27 Added the % operator to ${eval:}.
4935 PH/28 Exim tries to create and chdir to its spool directory when it starts;
4936 it should be ignoring failures (because with -C, for example, it has lost
4937 privilege). It wasn't ignoring creation failures other than "already
4940 PH/29 Added "crypteq" to the list of supported features that Exim outputs when
4943 PH/30 Fixed (presumably very longstanding) bug in exim_dbmbuild: if it failed
4944 because an input line was too long, either on its own, or by virtue of
4945 too many continuations, the temporary file was not being removed, and the
4946 return code was incorrect.
4948 PH/31 Missing "BOOL" in function definition in filtertest.c.
4950 PH/32 Applied Sieve patches from the maintainer.
4952 TK/05 Domainkeys: Accomodate for a minor API change in libdomainkeys 0.67.
4954 PH/33 Added "verify = not_blind".
4956 PH/34 There are settings for CHOWN_COMMAND and MV_COMMAND that can be used in
4957 Local/Makefile (with some defaults set). These are used in built scripts
4958 such as exicyclog, but they have never been used in the exim_install
4959 script (though there are many overriding facilities there). I have
4960 arranged that the exim_install script now takes note of these two
4963 PH/35 Installed configuration files for Dragonfly.
4965 PH/36 When a locally submitted message by a trusted user did not contain a
4966 From: header, and the sender address was obtained from -f or from an SMTP
4967 MAIL command, and the trusted user did not use -F to supply a sender
4968 name, $originator_name was incorrectly used when constructing a From:
4969 header. Furthermore, $originator_name was used for submission mode
4970 messages from external hosts without From: headers in a similar way,
4971 which is clearly wrong.
4973 PH/37 Added control=suppress_local_fixups.
4975 PH/38 When log_selector = +received_sender was set, and the addition of the
4976 sender made the log line's construction buffer exactly full, or one byte
4977 less than full, an overflow happened when the terminating "\n" was
4980 PH/39 Added a new log selector, "unknown_in_list", which provokes a log entry
4981 when the result of a list match is failure because a DNS lookup failed.
4983 PH/40 RM_COMMAND is now used in the building process.
4985 PH/41 Added a "distclean" target to the top-level Makefile; it deletes all
4986 the "build-* directories that it finds.
4988 PH/42 (But a TF fix): In a domain list, Exim incorrectly matched @[] if the IP
4989 address in a domain literal was a prefix of an interface address.
4991 PH/43 (Again a TF fix): In the dnslookup router, do not apply widen_domains
4992 when verifying a sender address, unless rewrite_headers is false.
4994 PH/44 Wrote a long comment about why errors_to addresses are verified as
4995 recipients, not senders.
4997 TF/01 Add missing LIBS=-lm to OS/Makefile-OpenBSD which was overlooked when
4998 the ratelimit ACL was added.
5000 PH/45 Added $smtp_command for the full command (cf $smtp_command_argument).
5002 PH/46 Added extra information about PostgreSQL errors to the error string.
5004 PH/47 Added an interface to a fake DNS resolver for use by the new test suite,
5005 avoiding the need to install special zones in a real server. This is
5006 backwards compatible; if it can't find the fake resolver, it drops back.
5007 Thus, both old and new test suites can be run.
5009 TF/02 Added util/ratelimit.pl
5011 TF/03 Minor fix to the ratelimit code to improve its behaviour in case the
5012 clock is set back in time.
5014 TF/04 Fix the ratelimit support in exim_fixdb. Patch provided by Brian
5015 Candler <B.Candler@pobox.com>.
5017 TF/05 The fix for PH/43 was not completely correct; widen_domains is always
5018 OK for addresses that are the result of redirections.
5020 PH/48 A number of further additions for the benefit of the new test suite,
5021 including a fake gethostbyname() that interfaces to the fake DNS resolver
5024 TF/06 The fix for widen_domains has also been applied to qualify_single and
5025 search_parents which are the other dnslookup options that can cause
5028 PH/49 Michael Haardt's randomized retrying, but as a separate retry parameter
5031 PH/50 Make never_users, trusted_users, admin_groups, trusted_groups expandable.
5033 TF/07 Exim produced the error message "an SRV record indicated no SMTP
5034 service" if it encountered an MX record with an empty target hostname.
5035 The message is now "an MX or SRV record indicated no SMTP service".
5037 TF/08 Change PH/13 introduced the possibility that verify=helo may defer,
5038 if the DNS of the sending site is misconfigured. This is quite a
5039 common situation. This change restores the behaviour of treating a
5040 helo verification defer as a failure.
5042 PH/51 If self=fail was set on a router, the bounce message did not include the
5043 actual error message.
5049 TF/01 Added support for Client SMTP Authorization. See NewStuff for details.
5051 PH/01 When a transport filter timed out in a pipe delivery, and the pipe
5052 command itself ended in error, the underlying message about the transport
5053 filter timeout was being overwritten with the pipe command error. Now the
5054 underlying error message should be appended to the second error message.
5056 TK/01 Fix poll() being unavailable on Mac OSX 10.2.
5058 PH/02 Reduce the amount of output that "make" produces by default. Full output
5059 can still be requested.
5061 PH/03 The warning log line about a condition test deferring for a "warn" verb
5062 was being output only once per connection, rather than after each
5063 occurrence (because it was using the same function as for successful
5064 "warn" verbs). This seems wrong, so I have changed it.
5066 TF/02 Two buglets in acl.c which caused Exim to read a few bytes of memory that
5067 it should not have, which might have caused a crash in the right
5068 circumstances, but probably never did.
5070 PH/04 Installed a modified version of Tony Finch's patch to make submission
5071 mode fix the return path as well as the Sender: header line, and to
5072 add a /name= option so that you can make the user's friendly name appear
5075 TF/03 Added the control = fakedefer ACL modifier.
5077 TF/04 Added the ratelimit ACL condition. See NewStuff for details. Thanks to
5078 Mark Lowes for thorough testing.
5080 TK/02 Rewrote SPF support to work with libspf2 versions >1.2.0.
5082 TK/03 Merged latest SRS patch from Miles Wilton.
5084 PH/05 There's a shambles in IRIX6 - it defines EX_OK in unistd.h which conflicts
5085 with the definition in sysexits.h (which is #included earlier).
5086 Fortunately, Exim does not actually use EX_OK. The code used to try to
5087 preserve the sysexits.h value, by assuming that macro definitions were
5088 scanned for macro replacements. I have been disabused of this notion,
5089 so now the code just undefines EX_OK before #including unistd.h.
5091 PH/06 There is a timeout for writing blocks of data, set by, e.g. data_timeout
5092 in the smtp transport. When a block could not be written in a single
5093 write() function, the timeout was being re-applied to each part-write.
5094 This seems wrong - if the receiver was accepting one byte at a time it
5095 would take for ever. The timeout is now adjusted when this happens. It
5096 doesn't have to be particularly precise.
5098 TK/04 Added simple SPF lookup method in EXPERIMENTAL_SPF. See NewStuff for
5099 details. Thanks to Chris Webb <chris@arachsys.com> for the patch!
5101 PH/07 Added "fullpostmaster" verify option, which does a check to <postmaster>
5102 without a domain if the check to <postmaster@domain> fails.
5104 SC/01 Eximstats: added -xls and the ability to specify output files
5105 (patch written by Frank Heydlauf).
5107 SC/02 Eximstats: use FileHandles for outputting results.
5109 SC/03 Eximstats: allow any combination of xls, txt, and html output.
5111 SC/04 Eximstats: fixed display of large numbers with -nvr option
5113 SC/05 Eximstats: fixed merging of reports with empty tables.
5115 SC/06 Eximstats: added the -include_original_destination flag
5117 SC/07 Eximstats: removed tabs and trailing whitespace.
5119 TK/05 Malware: Improve on aveserver error handling. Patch from Alex Miller.
5121 TK/06 MBOX spool code: Add real "From " MBOX separator line
5122 so the .eml file is really in mbox format (even though
5123 most programs do not really care). Patch from Alex Miller.
5125 TK/07 MBOX spool code: Add X-Envelope-From: and X-Envelope-To: headers.
5126 The latter is generated from $received_to and is only set if the
5127 message has one envelope recipient. SA can use these headers,
5128 obviously out-of-the-box. Patch from Alex Miller.
5130 PH/08 The ${def test on a variable was returning false if the variable's
5131 value was "0", contrary to what the specification has always said!
5132 The result should be true unless the variable is empty.
5134 PH/09 The syntax error of a character other than { following "${if
5135 def:variable_name" (after optional whitespace) was not being diagnosed.
5136 An expansion such as ${if def:sender_ident:{xxx}{yyy}} in which an
5137 accidental colon was present, for example, could give incorrect results.
5139 PH/10 Tidied the code in a number of places where the st_size field of a stat()
5140 result is used (not including appendfile, where other changes are about
5143 PH/11 Upgraded appendfile so that quotas larger than 2G are now supported.
5144 This involved changing a lot of size variables from int to off_t. It
5145 should work with maildirs and everything.
5147 TK/08 Apply fix provided by Michael Haardt to prevent deadlock in case of
5148 spamd dying while we are connected to it.
5150 TF/05 Fixed a ${extract error message typo reported by Jeremy Harris
5153 PH/12 Applied Alex Kiernan's patch for the API change for the error callback
5154 function for BDB 4.3.
5156 PH/13 Changed auto_thaw such that it does not apply to bounce messages.
5158 PH/14 Imported PCRE 6.0; this was more than just a trivial operation because
5159 the sources for PCRE have been re-arranged and more files are now
5162 PH/15 The code I had for printing potentially long long variables in PH/11
5163 above was not the best (it lost precision). The length of off_t variables
5164 is now inspected at build time, and an appropriate printing format (%ld
5165 or %lld) is chosen and #defined by OFF_T_FMT. We also define LONGLONG_T
5166 to be "long long int" or "long int". This is needed for the internal
5167 formatting function string_vformat().
5169 PH/16 Applied Matthew Newton's patch to exicyclog: "If log_file_path is set in
5170 the configuration file to be ":syslog", then the script "guesses" where
5171 the logs files are, rather than using the compiled in default. In our
5172 case the guess is not the same as the compiled default, so the script
5173 suddenly stopped working when I started to use syslog. The patch checks
5174 to see if log_file_path is "". If so, it attempts to read it from exim
5175 with no configuration file to get the compiled in version, before it
5176 falls back to the previous guessing code."
5178 TK/09 Added "prvs" and "prvscheck" expansion items. These help a lot with
5179 implementing BATV in an Exim configuration. See NewStuff for the gory
5182 PH/17 Applied Michael Haardt's patch for HP-UX, affecting only the os.h and
5183 Makefile that are specific to HP-UX.
5185 PH/18 If the "use_postmaster" option was set for a recipient callout together
5186 with the "random" option, the postmaster address was used as the MAIL
5187 FROM address for the random test, but not for the subsequent recipient
5188 test. It is now used for both.
5190 PH/19 Applied Michael Haardt's patch to update Sieve to RFC3028bis. "The
5191 patch removes a few documentation additions to RFC 3028, because the
5192 latest draft now contains them. It adds the new en;ascii-case comparator
5193 and a new error check for 8bit text in MIME parts. Comparator and
5194 require names are now matched exactly. I enabled the subaddress
5195 extension, but it is not well tested yet (read: it works for me)."
5197 PH/20 Added macros for time_t as for off_t (see PH/15 above) and used them to
5198 rework some of the code of TK/09 above to avoid the hardwired use of
5199 "%lld" and "long long". Replaced the call to snprintf() with a call to
5202 PH/21 Added some other messages to those in 4.51/PH/42, namely "All relevant MX
5203 records point to non-existent hosts", "retry timeout exceeded", and
5204 "retry time not reached for any host after a long failure period".
5206 PH/22 Fixed some oversights/typos causing bugs when Exim is compiled with
5207 experimental DomainKeys support:
5209 (1) The filter variables $n0-$n9 and $sn0-$sn9 were broken.
5210 (2) On an error such as an illegally used "control", the wrong name for
5211 the control was given.
5213 These problems did NOT occur unless DomainKeys support was compiled.
5215 PH/23 Added daemon_startup_retries and daemon_startup_sleep.
5217 PH/24 Added ${if match_ip condition.
5219 PH/25 Put debug statements on either side of calls to EXIM_DBOPEN() for hints
5220 databases so that it will be absolutely obvious if a crash occurs in the
5221 DB library. This is a regular occurrence (often caused by mis-matched
5224 PH/26 Insert a lot of missing (void) casts for functions such as chown(),
5225 chmod(), fcntl(), sscanf(), and other functions from stdio.h. These were
5226 picked up on a user's system that detects such things. There doesn't seem
5227 to be a gcc warning option for this - only an attribute that has to be
5228 put on the function's prototype. It seems that in Fedora Core 4 they have
5229 set this on a number of new functions. No doubt there will be more in due
5232 PH/27 If a dnslookup or manualroute router is set with verify=only, it need not
5233 specify a transport. However, if an address that was verified by such a
5234 router was the subject of a callout, Exim crashed because it tried to
5235 read the rcpt_include_affixes from the non-existent transport. Now it
5236 just assumes that the setting of that option is false. This bug was
5237 introduced by 4.51/PH/31.
5239 PH/28 Changed -d+all to exclude +memory, because that information is very
5240 rarely of interest, but it makes the output a lot bigger. People tend to
5241 do -d+all out of habit.
5243 PH/29 Removed support for the Linux-libc5 build, as it is obsolete and the
5244 code in os-type was giving problems when libc.so lives in lib64, like on
5247 PH/30 Exim's DNS code uses the original T_xxx names for DNS record times. These
5248 aren't the modern standard, and it seems that some systems' include files
5249 don't always have them. Exim was already checking for some of the newer
5250 ones like T_AAAA, and defining it itself. I've added checks for all the
5251 record types that Exim uses.
5253 PH/31 When using GnuTLS, if the parameters cache file did not exist, Exim was
5254 not automatically generating a new one, as it is supposed to. This
5255 prevented TLS from working. If the file did exist, but contained invalid
5256 data, a new version was generated, as expected. It was only the case of a
5257 non-existent file that was broken.
5259 TK/10 Domainkeys: Fix a bug in verification that caused a crash in conjunction
5260 with a change in libdomainkeys > 0.64.
5262 TK/11 Domainkeys: Change the logic how the "testing" policy flag is retrieved
5263 from DNS. If the selector record carries the flag, it now has
5264 precedence over the domain-wide flag.
5266 TK/12 Cleared some compiler warnings related to SPF, SRS and DK code.
5268 PH/32 In mua_wrapper mode, if an smtp transport configuration error (such as
5269 the use of a port name that isn't defined in /etc/services) occurred, the
5270 message was deferred as in a normal delivery, and thus remained on the
5271 spool, instead of being failed because of the mua_wrapper setting. This
5272 is now fixed, and I tidied up some of the mua_wrapper messages at the
5275 SC/08 Eximstats: whilst parsing the mainlog(s), store information about
5276 the messages in a hash of arrays rather than using individual hashes.
5277 This is a bit cleaner and results in dramatic memory savings, albeit
5278 at a slight CPU cost.
5280 SC/09 Eximstats: added the -show_rt<list> and the -show_dt<list> flags
5281 as requested by Marc Sherman.
5283 SC/10 Eximstats: added histograms for user specified patterns as requested
5286 SC/11 Eximstats: v1.43 - bugfix for pattern histograms with -h0 specified.
5288 PH/33 Patch from the Cygwin maintainer to add "b" to all occurences of
5289 fopen() in the content-scanning modules that did not already have it.
5295 TK/01 Added Yahoo DomainKeys support via libdomainkeys. See
5296 doc/experimental-spec.txt for details. (http://domainkeys.sf.net)
5298 TK/02 Fix ACL "control" statement not being available in MIME ACL.
5300 TK/03 Fix ACL "regex" condition not being available in MIME ACL.
5302 PH/01 Installed a patch from the Sieve maintainer that allows -bf to be used
5303 to test Sieve filters that use "vacation".
5305 PH/02 Installed a slightly modified version of Nikos Mavrogiannopoulos' patch
5306 that changes the way the GnuTLS parameters are stored in the cache file.
5307 The new format can be generated externally. For backward compatibility,
5308 if the data in the cache doesn't make sense, Exim assumes it has read an
5309 old-format file, and it generates new data and writes a new file. This
5310 means that you can't go back to an older release without removing the
5313 PH/03 A redirect router that has both "unseen" and "one_time" set does not
5314 work if there are any delivery delays because "one_time" forces the
5315 parent to be marked "delivered", so its unseen clone is never tried
5316 again. For this reason, Exim now forbids the simultaneous setting of
5319 PH/04 Change 4.11/85 fixed an obscure bug concerned with addresses that are
5320 redirected to themselves ("homonym" addresses). Read the long ChangeLog
5321 entry if you want to know the details. The fix, however, neglected to
5322 consider the case when local delivery batching is involved. The test for
5323 "previously delivered" was not happening when checking to see if an
5324 address could be batched with a previous (undelivered) one; under
5325 certain circumstances this could lead to multiple deliveries to the same
5328 PH/05 Renamed the macro SOCKLEN_T as EXIM_SOCKLEN_T because AIX uses SOCKLEN_T
5329 in its include files, and this causes problems building Exim.
5331 PH/06 A number of "verify =" ACL conditions have no options (e.g. verify =
5332 header_syntax) but Exim was just ignoring anything given after a slash.
5333 In particular, this caused confusion with an attempt to use "verify =
5334 reverse_host_lookup/defer_ok". An error is now given when options are
5335 supplied for verify items that do not have them. (Maybe reverse_host_
5336 lookup should have a defer_ok option, but that's a different point.)
5338 PH/07 Increase the size of the buffer for incoming SMTP commands from 512 (as
5339 defined by RFC 821) to 2048, because there were problems with some AUTH
5340 commands, and RFC 1869 says the size should be increased for extended
5341 SMTP commands that take arguments.
5343 PH/08 Added ${dlfunc dynamically loaded function for expansion (code from Tony
5346 PH/09 Previously, an attempt to use ${perl when it wasn't compiled gave an
5347 "unknown" error; now it says that the functionality isn't in the binary.
5349 PH/10 Added a nasty fudge to try to recognize and flatten LDAP passwords in
5350 an address' error message when a string expansion fails (syntax or
5351 whatever). Otherwise the password may appear in the log. Following change
5352 PH/42 below, there is no longer a chance of it appearing in a bounce
5355 PH/11 Installed exipick version 20050225.0 from John Jetmore.
5357 PH/12 If the last host in a fallback_hosts list was multihomed, only the first
5358 of its addresses was ever tried. (Bugzilla bug #2.)
5360 PH/13 If "headers_add" in a transport didn't end in a newline, Exim printed
5361 the result incorrectly in the debug output. (It correctly added a newline
5362 to what was transported.)
5364 TF/01 Added $received_time.
5366 PH/14 Modified the default configuration to add an acl_smtp_data ACL, with
5367 commented out examples of how to interface to a virus scanner and to
5368 SpamAssassin. Also added commented examples of av_scanner and
5369 spamd_address settings.
5371 PH/15 Further to TK/02 and TK/03 above, tidied up the tables of what conditions
5372 and controls are allowed in which ACLs. There were a couple of minor
5373 errors. Some of the entries in the conditions table (which is a table of
5374 where they are NOT allowed) were getting very unwieldy; rewrote them as a
5375 negation of where the condition IS allowed.
5377 PH/16 Installed updated OS/os.c-cygwin from the Cygwin maintainer.
5379 PH/17 The API for radiusclient changed at release 0.4.0. Unfortunately, the
5380 header file does not have a version number, so I've had to invent a new
5381 value for RADIUS_LIB_TYPE, namely "RADIUSCLIENTNEW" to request the new
5382 API. The code is untested by me (my Linux distribution still has 0.3.2 of
5383 radiusclient), but it was contributed by a Radius user.
5385 PH/18 Installed Lars Mainka's patch for the support of CRL collections in
5386 files or directories, for OpenSSL.
5388 PH/19 When an Exim process that is running as root has to create an Exim log
5389 file, it does so in a subprocess that runs as exim:exim so as to get the
5390 ownership right at creation (otherwise, other Exim processes might see
5391 the file with the wrong ownership). There was no test for failure of this
5392 fork() call, which would lead to the process getting stuck as it waited
5393 for a non-existent subprocess. Forks do occasionally fail when resources
5394 run out. I reviewed all the other calls to fork(); they all seem to check
5397 PH/20 When checking for unexpected SMTP input at connect time (before writing
5398 the banner), Exim was not dealing correctly with a non-positive return
5399 from the read() function. If the client had disconnected by this time,
5400 the result was a log entry for a synchronization error with an empty
5401 string after "input=" when read() returned zero. If read() returned -1
5402 (an event I could not check), uninitialized data bytes were printed.
5403 There were reports of junk text (parts of files, etc) appearing after
5406 PH/21 Added acl_not_smtp_mime to allow for MIME scanning for non-SMTP messages.
5408 PH/22 Added support for macro redefinition, and (re)definition in between
5409 driver and ACL definitions.
5411 PH/23 The cyrus_sasl authenticator was expanding server_hostname, but then
5412 forgetting to use the resulting value; it was using the unexpanded value.
5414 PH/24 The cyrus_sasl authenticator was advertising mechanisms for which it
5415 hadn't been configured. The fix is from Juergen Kreileder, who
5416 understands it better than I do:
5418 "Here's what I see happening with three configured cyrus_sasl
5419 authenticators configured (plain, login, cram-md5):
5421 On startup auth_cyrus_sasl_init() gets called for each of these.
5422 This means three calls to sasl_listmech() without a specified mech_list.
5423 => SASL tests which mechs of all available mechs actually work
5424 => three warnings about OTP not working
5425 => the returned list contains: plain, login, cram-md5, digest-md5, ...
5427 With the patch, sasl_listmech() also gets called three times. But now
5428 SASL's mech_list option is set to the server_mech specified in the the
5429 authenticator. Or in other words, the answer from sasl_listmech()
5430 gets limited to just the mech you're testing for (which is different
5432 => the return list contains just 'plain' or 'login', 'cram-md5' or
5433 nothing depending on the value of ob->server_mech.
5435 I've just tested the patch: Authentication still works fine,
5436 unavailable mechs specified in the exim configuration are still
5437 caught, and the auth.log warnings about OTP are gone."
5439 PH/25 When debugging is enabled, the contents of the command line are added
5440 to the debugging output, even when log_selector=+arguments is not
5443 PH/26 Change scripts/os-type so that when "uname -s" returns just "GNU", the
5444 answer is "GNU", and only if the return is "GNU/something" is the answer
5447 PH/27 $acl_verify_message is now set immediately after the failure of a
5448 verification in an ACL, and so is available in subsequent modifiers. In
5449 particular, the message can be preserved by coding like this:
5451 warn !verify = sender
5452 set acl_m0 = $acl_verify_message
5454 Previously, $acl_verify_message was set only while expanding "message"
5455 and "log_message" when a very denied access.
5457 PH/28 Modified OS/os.c-Linux with
5459 -#ifndef OS_LOAD_AVERAGE
5460 +#if !defined(OS_LOAD_AVERAGE) && defined(__linux__)
5462 to make Exim compile on kfreebsd-gnu. (I'm totally confused about the
5463 nomenclature these days.)
5465 PH/29 Installed patch from the Sieve maintainer that adds the options
5466 sieve_useraddress and sieve_subaddress to the redirect router.
5468 PH/30 In these circumstances:
5469 . Two addresses routed to the same list of hosts;
5470 . First host does not offer TLS;
5471 . First host accepts first address;
5472 . First host gives temporary error to second address;
5473 . Second host offers TLS and a TLS session is established;
5474 . Second host accepts second address.
5475 Exim incorrectly logged both deliveries with the TLS parameters (cipher
5476 and peerdn, if requested) that were in fact used only for the second
5479 PH/31 When doing a callout as part of verifying an address, Exim was not paying
5480 attention to any local part prefix or suffix that was matched by the
5481 router that accepted the address. It now behaves in the same way as it
5482 does for delivery: the affixes are removed from the local part unless
5483 rcpt_include_affixes is set on the transport.
5485 PH/32 Add the sender address, as F=<...>, to the log line when logging a
5486 timeout during the DATA phase of an incoming message.
5488 PH/33 Sieve envelope tests were broken for match types other than :is. I have
5489 applied a patch sanctioned by the Sieve maintainer.
5491 PH/34 Change 4.50/80 broke Exim in that it could no longer handle cases where
5492 the uid or gid is negative. A case of a negative gid caused this to be
5493 noticed. The fix allows for either to be negative.
5495 PH/35 ACL_WHERE_MIME is now declared unconditionally, to avoid too much code
5496 clutter, but the tables that are indexed by ACL_WHERE_xxx values had been
5499 PH/36 The change PH/12 above was broken. Fixed it.
5501 PH/37 Exim used to check for duplicate addresses in the middle of routing, on
5502 the grounds that routing the same address twice would always produce the
5503 same answer. This might have been true once, but it is certainly no
5504 longer true now. Routing a child address may depend on the previous
5505 routing that produced that child. Some complicated redirection strategies
5506 went wrong when messages had multiple recipients, and made Exim's
5507 behaviour dependent on the order in which the addresses were given.
5509 I have moved the duplicate checking until after the routing is complete.
5510 Exim scans the addresses that are assigned to local and remote
5511 transports, and removes any duplicates. This means that more work will be
5512 done, as duplicates will always all be routed, but duplicates are
5513 presumably rare, so I don't expect this is of any significance.
5515 For deliveries to pipes, files, and autoreplies, the duplicate checking
5516 still happens during the routing process, since they are not going to be
5519 PH/38 Installed a patch from Ian Freislich, with the agreement of Tom Kistner.
5520 It corrects a timeout issue with spamd. This is Ian's comment: "The
5521 background is that sometimes spamd either never reads data from a
5522 connection it has accepted, or it never writes response data. The exiscan
5523 spam.[ch] uses a 3600 second timeout on spamd socket reads, further, it
5524 blindly assumes that writes won't block so it may never time out."
5526 PH/39 Allow G after quota size as well as K and M.
5528 PH/40 The value set for $authenticated_id in an authenticator may not contain
5529 binary zeroes or newlines because the value is written to log lines and
5530 to spool files. There was no check on this. Now the value is run through
5531 the string_printing() function so that such characters are converted to
5532 printable escape sequences.
5534 PH/41 $message_linecount is a new variable that contains the total number of
5535 lines in the message. Compare $body_linecount, which is the count for the
5538 PH/42 Exim no longer gives details of delivery errors for specific addresses in
5539 bounce and delay warning messages, except in certain special cases, which
5542 (a) An SMTP error message from a remote host;
5543 (b) A message specified in a :fail: redirection;
5544 (c) A message specified in a "fail" command in a system filter;
5545 (d) A message specified in a FAIL return from the queryprogram router;
5546 (e) A message specified by the cannot_route_message router option.
5548 In these cases only, Exim does include the error details in bounce and
5549 warning messages. There are also a few cases where bland messages such
5550 as "unrouteable address" or "local delivery error" are given.
5552 PH/43 $value is now also set for the "else" part of a ${run expansion.
5554 PH/44 Applied patch from the Sieve maintainer: "The vacation draft is still
5555 being worked on, but at least Exim now implements the latest version to
5558 PH/45 In a pipe transport, although a timeout while waiting for the pipe
5559 process to complete was treated as a delivery failure, a timeout while
5560 writing the message to the pipe was logged, but erroneously treated as a
5561 successful delivery. Such timeouts include transport filter timeouts. For
5562 consistency with the overall process timeout, these timeouts are now
5563 treated as errors, giving rise to delivery failures by default. However,
5564 there is now a new Boolean option for the pipe transport called
5565 timeout_defer, which, if set TRUE, converts the failures into defers for
5566 both kinds of timeout. A transport filter timeout is now identified in
5569 PH/46 The "scripts/Configure-config.h" script calls "make" at one point. On
5570 systems where "make" and "gmake" are different, calling "gmake" at top
5571 level broke things. I've arranged for the value of $(MAKE) to be passed
5572 from the Makefile to this script so that it can call the same version of
5576 A note about Exim versions 4.44 and 4.50
5577 ----------------------------------------
5579 Exim 4.50 was meant to be the next release after 4.43. It contains a lot of
5580 changes of various kinds. As a consequence, a big documentation update was
5581 needed. This delayed the release for rather longer than seemed good, especially
5582 in the light of a couple of (minor) security issues. Therefore, the changes
5583 that fixed bugs were backported into 4.43, to create a 4.44 maintenance
5584 release. So 4.44 and 4.50 are in effect two different branches that both start
5587 I have left the 4.50 change log unchanged; it contains all the changes since
5588 4.43. The change log for 4.44 is below; many of its items are identical to
5589 those for 4.50. This seems to be the most sensible way to preserve the
5590 historical information.
5596 1. Minor wording change to the doc/README.SIEVE file.
5598 2. Change 4.43/35 introduced a bug: if quota_filecount was set, the
5599 computation of the current number of files was incorrect.
5601 3. Closing a stable door: arrange to panic-die if setitimer() ever fails. The
5602 bug fixed in 4.43/37 would have been diagnosed quickly if this had been in
5605 4. Give more explanation in the error message when the command for a transport
5606 filter fails to execute.
5608 5. There are several places where Exim runs a non-Exim command in a
5609 subprocess. The SIGUSR1 signal should be disabled for these processes. This
5610 was being done only for the command run by the queryprogram router. It is
5611 now done for all such subprocesses. The other cases are: ${run, transport
5612 filters, and the commands run by the lmtp and pipe transports.
5614 6. Added CONFIGURE_GROUP build-time option.
5616 7. Some older OS have a limit of 256 on the maximum number of file
5617 descriptors. Exim was using setrlimit() to set 1000 as a large value
5618 unlikely to be exceeded. Change 4.43/17 caused a lot of logging on these
5619 systems. I've change it so that if it can't get 1000, it tries for 256.
5621 8. "control=submission" was allowed, but had no effect, in a DATA ACL. This
5622 was an oversight, and furthermore, ever since the addition of extra
5623 controls (e.g. 4.43/32), the checks on when to allow different forms of
5624 "control" were broken. There should now be diagnostics for all cases when a
5625 control that does not make sense is encountered.
5627 9. Added the /retain_sender option to "control=submission".
5629 10. $recipients is now available in the predata ACL (oversight).
5631 11. Tidy the search cache before the fork to do a delivery from a message
5632 received from the command line. Otherwise the child will trigger a lookup
5633 failure and thereby defer the delivery if it tries to use (for example) a
5634 cached ldap connection that the parent has called unbind on.
5636 12. If verify=recipient was followed by verify=sender in a RCPT ACL, the value
5637 of $address_data from the recipient verification was clobbered by the
5638 sender verification.
5640 13. The value of address_data from a sender verification is now available in
5641 $sender_address_data in subsequent conditions in the ACL statement.
5643 14. Added forbid_sieve_filter and forbid_exim_filter to the redirect router.
5645 15. Added a new option "connect=<time>" to callout options, to set a different
5648 16. If FIXED_NEVER_USERS was defined, but empty, Exim was assuming the uid 0
5649 was its contents. (It was OK if the option was not defined at all.)
5651 17. A "Completed" log line is now written for messages that are removed from
5652 the spool by the -Mrm option.
5654 18. New variables $sender_verify_failure and $recipient_verify_failure contain
5655 information about exactly what failed.
5657 19. Added -dd to debug only the daemon process.
5659 20. Incorporated Michael Haardt's patch to ldap.c for improving the way it
5660 handles timeouts, both on the server side and network timeouts. Renamed the
5661 CONNECT parameter as NETTIMEOUT (but kept the old name for compatibility).
5663 21. The rare case of EHLO->STARTTLS->HELO was setting the protocol to "smtp".
5664 It is now set to "smtps".
5666 22. $host_address is now set to the target address during the checking of
5667 ignore_target_hosts.
5669 23. When checking ignore_target_hosts for an ipliteral router, no host name was
5670 being passed; this would have caused $sender_host_name to have been used if
5671 matching the list had actually called for a host name (not very likely,
5672 since this list is usually IP addresses). A host name is now passed as
5675 24. Changed the calls that set up the SIGCHLD handler in the daemon to use the
5676 code that specifies a non-restarting handler (typically sigaction() in
5677 modern systems) in an attempt to fix a rare and obscure crash bug.
5679 25. Narrowed the window for a race in the daemon that could cause it to ignore
5680 SIGCHLD signals. This is not a major problem, because they are used only to
5681 wake it up if nothing else does.
5683 26. A malformed maildirsize file could cause Exim to calculate negative values
5684 for the mailbox size or file count. Odd effects could occur as a result.
5685 The maildirsize information is now recalculated if the size or filecount
5688 27. Added HAVE_SYS_STATVFS_H to the os.h file for Linux, as it has had this
5689 support for a long time. Removed HAVE_SYS_VFS_H.
5691 28. Installed the latest version of exipick from John Jetmore.
5693 29. In an address list, if the pattern was not a regular expression, an empty
5694 subject address (from a bounce message) matched only if the pattern was an
5695 empty string. Non-empty patterns were not even tested. This was the wrong
5696 because it is perfectly reasonable to use an empty address as part of a
5697 database query. An empty address is now tested by patterns that are
5698 lookups. However, all the other forms of pattern expect the subject to
5699 contain a local part and a domain, and therefore, for them, an empty
5700 address still always fails if the pattern is not itself empty.
5702 30. Exim went into a mad DNS loop when attempting to do a callout where the
5703 host was specified on an smtp transport, and looking it up yielded more
5704 than one IP address.
5706 31. Re-factored the code for checking spool and log partition space into a
5707 function that finds that data and another that does the check. The former
5708 is then used to implement four new variables: $spool_space, $log_space,
5709 $spool_inodes, and $log_inodes.
5711 32. The RFC2047 encoding function was originally intended for short strings
5712 such as real names; it was not keeping to the 75-character limit for
5713 encoded words that the RFC imposes. It now respects the limit, and
5714 generates multiple encoded words if necessary. To be on the safe side, I
5715 have increased the buffer size for the ${rfc2047: expansion operator from
5718 33. It is now permitted to omit both strings after an "if" condition; if the
5719 condition is true, the result is "true". As before, when the second string
5720 is omitted, a false condition yields an empty string. This makes it less
5721 cumbersome to write custom ACL and router conditions.
5723 34. Failure to deliver a bounce message always caused it to be frozen, even if
5724 there was an errors_to setting on the router. The errors_to setting is now
5727 35. If an IPv6 address is given for -bh or -bhc, it is now converted to the
5728 canonical form (fully expanded) before being placed in
5729 $sender_host_address.
5731 36. The table in the code that translates DNS record types into text (T_A to
5732 "A" for instance) was missing entries for NS and CNAME. It is just possible
5733 that this could have caused confusion if both these types were looked up
5734 for the same domain, because the text type is used as part of Exim's
5735 per-process caching. But the chance of anyone hitting this buglet seems
5738 37. The dnsdb lookup has been extended in a number of ways.
5740 (1) There is a new type, "zns", which walks up the domain tree until it
5741 finds some nameserver records. It should be used with care.
5743 (2) There is a new type, "mxh", which is like "mx" except that it returns
5744 just the host names, not the priorities.
5746 (3) It is now possible to give a list of domains (or IP addresses) to be
5747 looked up. The behaviour when one of the lookups defers can be
5748 controlled by a keyword.
5750 (4) It is now possible to specify the separator character for use when
5751 multiple records are returned.
5753 38. The dnslists ACL condition has been extended: it is now possible to supply
5754 a list of IP addresses and/or domains to be looked up in a particular DNS
5757 39. Added log_selector=+queue_time_overall.
5759 40. When running the queue in the test harness, wait just a tad after forking a
5760 delivery process, to get repeatability of debugging output.
5762 41. Include certificate and key file names in error message when GnuTLS fails
5763 to set them up, because the GnuTLS error message doesn't include the name
5764 of the failing file when there is a problem reading it.
5766 42. Allow both -bf and -bF in the same test run.
5768 43. Did the same fix as 41 above for OpenSSL, which had the same infelicity.
5770 44. The "Exiscan patch" is now merged into the mainline Exim source.
5772 45. Sometimes the final signoff response after QUIT could fail to get
5773 transmitted in the non-TLS case. Testing !tls_active instead of tls_active
5774 < 0 before doing a fflush(). This bug looks as though it goes back to the
5775 introduction of TLS in release 3.20, but "sometimes" must have been rare
5776 because the tests only now provoked it.
5778 46. Reset the locale to "C" after calling embedded Perl, in case it was changed
5779 (this can affect the format of dates).
5781 47. exim_tidydb, when checking for the continued existence of a message for
5782 which it has found a message-specific retry record, was not finding
5783 messages that were in split spool directories. Consequently, it was
5784 deleting retry records that should have stayed in existence.
5786 48. Steve fixed some bugs in eximstats.
5788 49. The SPA authentication driver was not abandoning authentication and moving
5789 on to the next authenticator when an expansion was forced to fail,
5790 contradicting the general specification for all authenticators. Instead it
5791 was generating a temporary error. It now behaves as specified.
5793 50. The default ordering of permitted cipher suites for GnuTLS was pessimal
5794 (the order specifies the preference for clients). The order is now AES256,
5795 AES128, 3DES, ARCFOUR128.
5797 51. Small patch to Sieve code - explicitly set From: when generating an
5800 52. Exim crashed if a remote delivery caused a very long error message to be
5801 recorded - for instance if somebody sent an entire SpamAssassin report back
5802 as a large number of 550 error lines. This bug was coincidentally fixed by
5803 increasing the size of one of Exim's internal buffers (big_buffer) that
5804 happened as part of the Exiscan merge. However, to be on the safe side, I
5805 have made the code more robust (and fixed the comments that describe what
5808 53. Now that there can be additional text after "Completed" in log lines (if
5809 the queue_time_overall log selector is set), a one-byte patch to exigrep
5810 was needed to allow it to recognize "Completed" as not the last thing in
5813 54. The LDAP lookup was not handling a return of LDAP_RES_SEARCH_REFERENCE. A
5814 patch that reportedly fixes this has been added. I am not expert enough to
5815 create a test for it. This is what the patch creator wrote:
5817 "I found a little strange behaviour of ldap code when working with
5818 Windows 2003 AD Domain, where users was placed in more than one
5819 Organization Units. When I tried to give exim partial DN, the exit code
5820 of ldap_search was unknown to exim because of LDAP_RES_SEARCH_REFERENCE.
5821 But simultaneously result of request was absolutely normal ldap result,
5822 so I produce this patch..."
5824 Later: it seems that not all versions of LDAP support LDAP_RES_SEARCH_
5825 REFERENCE, so I have modified the code to exclude the patch when that macro
5828 55. Some experimental protocols are using DNS PTR records for new purposes. The
5829 keys for these records are domain names, not reversed IP addresses. The
5830 dnsdb PTR lookup now tests whether its key is an IP address. If not, it
5831 leaves it alone. Component reversal etc. now happens only for IP addresses.
5834 56. Improve error message when ldap_search() fails in OpenLDAP or Solaris LDAP.
5836 57. Double the size of the debug message buffer (to 2048) so that more of very
5837 long debug lines gets shown.
5839 58. The exicyclog utility now does better if the number of log files to keep
5840 exceeds 99. In this case, it numbers them 001, 002 ... instead of 01, 02...
5842 59. Two changes related to the smtp_active_hostname option:
5844 (1) $smtp_active_hostname is now available as a variable.
5845 (2) The default for smtp_banner uses $smtp_active_hostname instead
5846 of $primary_hostname.
5848 60. The host_aton() function is supposed to be passed a string that is known
5849 to be a valid IP address. However, in the case of IPv6 addresses, it was
5850 not checking this. This is a hostage to fortune. Exim now panics and dies
5851 if the condition is not met. A case was found where this could be provoked
5852 from a dnsdb PTR lookup with an IPv6 address that had more than 8
5853 components; fortuitously, this particular loophole had already been fixed
5854 by change 4.50/55 above.
5856 If there are any other similar loopholes, the new check in host_aton()
5857 itself should stop them being exploited. The report I received stated that
5858 data on the command line could provoke the exploit when Exim was running as
5859 exim, but did not say which command line option was involved. All I could
5860 find was the use of -be with a bad dnsdb PTR lookup, and in that case it is
5861 running as the user.
5864 61. There was a buffer overflow vulnerability in the SPA authentication code
5865 (which came originally from the Samba project). I have added a test to the
5866 spa_base64_to_bits() function which I hope fixes it.
5869 62. Configuration update for GNU/Hurd and variations. Updated Makefile-GNU and
5870 os.h-GNU, and added configuration files for GNUkFreeBSD and GNUkNetBSD.
5872 63. The daemon start-up calls getloadavg() while still root for those OS that
5873 need the first call to be done as root, but it missed one case: when
5874 deliver_queue_load_max is set with deliver_drop_privilege. This is
5875 necessary for the benefit of the queue runner, because there is no re-exec
5876 when deliver_drop_privilege is set.
5878 64. A call to exiwhat cut short delays set up by "delay" modifiers in ACLs.
5879 This has been fixed.
5881 65. Caching of lookup data for "hosts =" ACL conditions, when a named host list
5882 was in use, was not putting the data itself into the right store pool;
5883 consequently, it could be overwritten for a subsequent message in the same
5884 SMTP connection. (Fix 4.40/11 dealt with the non-cache case, but overlooked
5887 66. Added hosts_max_try_hardlimit to the smtp transport, default 50.
5889 67. The string_is_ip_address() function returns 0, 4, or 6, for "no an IP
5890 address", "IPv4 address", and "IPv6 address", respectively. Some calls of
5891 the function were treating the return as a boolean value, which happened to
5892 work because 0=false and not-0=true, but is not correct code.
5894 68. The host_aton() function was not handling scoped IPv6 addresses (those
5895 with, for example, "%eth0" on the end) correctly.
5897 69. Fixed some compiler warnings in acl.c for the bitmaps specified with
5898 negated items (that is, ~something) in unsigned ints. Some compilers
5899 apparently mutter when there is no cast.
5901 70. If an address verification called from an ACL failed, and did not produce a
5902 user-specific message (i.e. there was only a "system" message), nothing was
5903 put in $acl_verify_message. In this situation, it now puts the system
5906 71. Change 4.23/11 added synchronization checking at the start of an SMTP
5907 session; change 4.31/43 added the unwanted input to the log line - except
5908 that it did not do this in the start of session case. It now does.
5910 72. After a timeout in a callout SMTP session, Exim still sent a QUIT command.
5911 This is wrong and can cause the other end to generate a synchronization
5912 error if it is another Exim or anything else that does the synchronization
5913 check. A QUIT command is no longer sent after a timeout.
5915 73. $host_lookup_deferred has been added, to make it easier to detect DEFERs
5916 during host lookups.
5918 74. The defer_ok option of callout verification was not working if it was used
5919 when verifying addresses in header lines, that is, for this case:
5921 verify = header_sender/callout=defer_ok
5923 75. A backgrounded daemon closed stdin/stdout/stderr on entry; this meant that
5924 those file descriptors could be used for SMTP connections. If anything
5925 wrote to stderr (the example that came up was "warn" in embedded Perl), it
5926 could be sent to the SMTP client, causing chaos. The daemon now opens
5927 stdin, stdout, and stderr to /dev/null when it puts itself into the
5930 76. Arrange for output from Perl's "warn" command to be written to Exim's main
5931 log by default. The user can override this with suitable Perl magic.
5933 77. The use of log_message on a "discard" ACL verb, which is supposed to add to
5934 the log message when discard triggers, was not working for the DATA ACL or
5935 for the non-SMTP ACL.
5937 78. Error message wording change in sieve.c.
5939 79. If smtp_accept_max_per_host was set, the number of connections could be
5940 restricted to fewer than expected, because the daemon was trying to set up
5941 a new connection before checking whether the processes handling previous
5942 connections had finished. The check for completed processes is now done
5943 earlier. On busy systems, this bug wouldn't be noticed because something
5944 else would have woken the daemon, and it would have reaped the completed
5947 80. If a message was submitted locally by a user whose login name contained one
5948 or more spaces (ugh!), the spool file that Exim wrote was not re-readable.
5949 It caused a spool format error. I have fixed the spool reading code. A
5950 related problem was that the "from" clause in the Received: line became
5951 illegal because of the space(s). It is now covered by ${quote_local_part.
5953 81. Included the latest eximstats from Steve (adds average sizes to HTML Top
5956 82. Updated OS/Makefile-AIX as per message from Mike Meredith.
5958 83. Patch from Sieve maintainer to fix unterminated string problem in
5959 "vacation" handling.
5961 84. Some minor changes to the Linux configuration files to help with other
5962 OS variants using glibc.
5964 85. One more patch for Sieve to update vacation handling to latest spec.
5967 ----------------------------------------------------
5968 See the note above about the 4.44 and 4.50 releases.
5969 ----------------------------------------------------
5975 1. Change 4.43/35 introduced a bug that caused file counts to be
5976 incorrectly computed when quota_filecount was set in an appendfile
5979 2. Closing a stable door: arrange to panic-die if setitimer() ever fails. The
5980 bug fixed in 4.43/37 would have been diagnosed quickly if this had been in
5983 3. Give more explanation in the error message when the command for a transport
5984 filter fails to execute.
5986 4. There are several places where Exim runs a non-Exim command in a
5987 subprocess. The SIGUSR1 signal should be disabled for these processes. This
5988 was being done only for the command run by the queryprogram router. It is
5989 now done for all such subprocesses. The other cases are: ${run, transport
5990 filters, and the commands run by the lmtp and pipe transports.
5992 5. Some older OS have a limit of 256 on the maximum number of file
5993 descriptors. Exim was using setrlimit() to set 1000 as a large value
5994 unlikely to be exceeded. Change 4.43/17 caused a lot of logging on these
5995 systems. I've change it so that if it can't get 1000, it tries for 256.
5997 6. "control=submission" was allowed, but had no effect, in a DATA ACL. This
5998 was an oversight, and furthermore, ever since the addition of extra
5999 controls (e.g. 4.43/32), the checks on when to allow different forms of
6000 "control" were broken. There should now be diagnostics for all cases when a
6001 control that does not make sense is encountered.
6003 7. $recipients is now available in the predata ACL (oversight).
6005 8. Tidy the search cache before the fork to do a delivery from a message
6006 received from the command line. Otherwise the child will trigger a lookup
6007 failure and thereby defer the delivery if it tries to use (for example) a
6008 cached ldap connection that the parent has called unbind on.
6010 9. If verify=recipient was followed by verify=sender in a RCPT ACL, the value
6011 of $address_data from the recipient verification was clobbered by the
6012 sender verification.
6014 10. If FIXED_NEVER_USERS was defined, but empty, Exim was assuming the uid 0
6015 was its contents. (It was OK if the option was not defined at all.)
6017 11. A "Completed" log line is now written for messages that are removed from
6018 the spool by the -Mrm option.
6020 12. $host_address is now set to the target address during the checking of
6021 ignore_target_hosts.
6023 13. When checking ignore_target_hosts for an ipliteral router, no host name was
6024 being passed; this would have caused $sender_host_name to have been used if
6025 matching the list had actually called for a host name (not very likely,
6026 since this list is usually IP addresses). A host name is now passed as
6029 14. Changed the calls that set up the SIGCHLD handler in the daemon to use the
6030 code that specifies a non-restarting handler (typically sigaction() in
6031 modern systems) in an attempt to fix a rare and obscure crash bug.
6033 15. Narrowed the window for a race in the daemon that could cause it to ignore
6034 SIGCHLD signals. This is not a major problem, because they are used only to
6035 wake it up if nothing else does.
6037 16. A malformed maildirsize file could cause Exim to calculate negative values
6038 for the mailbox size or file count. Odd effects could occur as a result.
6039 The maildirsize information is now recalculated if the size or filecount
6042 17. Added HAVE_SYS_STATVFS_H to the os.h file for Linux, as it has had this
6043 support for a long time. Removed HAVE_SYS_VFS_H.
6045 18. Updated exipick to current release from John Jetmore.
6047 19. Allow an empty sender to be matched against a lookup in an address list.
6048 Previously the only cases considered were a regular expression, or an
6051 20. Exim went into a mad DNS lookup loop when doing a callout where the
6052 host was specified on the transport, if the DNS lookup yielded more than
6055 21. The RFC2047 encoding function was originally intended for short strings
6056 such as real names; it was not keeping to the 75-character limit for
6057 encoded words that the RFC imposes. It now respects the limit, and
6058 generates multiple encoded words if necessary. To be on the safe side, I
6059 have increased the buffer size for the ${rfc2047: expansion operator from
6062 22. Failure to deliver a bounce message always caused it to be frozen, even if
6063 there was an errors_to setting on the router. The errors_to setting is now
6066 23. If an IPv6 address is given for -bh or -bhc, it is now converted to the
6067 canonical form (fully expanded) before being placed in
6068 $sender_host_address.
6070 24. Updated eximstats to version 1.33
6072 25. Include certificate and key file names in error message when GnuTLS fails
6073 to set them up, because the GnuTLS error message doesn't include the name
6074 of the failing file when there is a problem reading it.
6076 26. Expand error message when OpenSSL has problems setting up cert/key files.
6079 27. Reset the locale to "C" after calling embedded Perl, in case it was changed
6080 (this can affect the format of dates).
6082 28. exim_tidydb, when checking for the continued existence of a message for
6083 which it has found a message-specific retry record, was not finding
6084 messages that were in split spool directories. Consequently, it was
6085 deleting retry records that should have stayed in existence.
6087 29. eximstats updated to version 1.35
6088 1.34 - allow eximstats to parse syslog lines as well as mainlog lines
6089 1.35 - bugfix such that pie charts by volume are generated correctly
6091 30. The SPA authentication driver was not abandoning authentication and moving
6092 on to the next authenticator when an expansion was forced to fail,
6093 contradicting the general specification for all authenticators. Instead it
6094 was generating a temporary error. It now behaves as specified.
6096 31. The default ordering of permitted cipher suites for GnuTLS was pessimal
6097 (the order specifies the preference for clients). The order is now AES256,
6098 AES128, 3DES, ARCFOUR128.
6100 31. Small patch to Sieve code - explicitly set From: when generating an
6103 32. Exim crashed if a remote delivery caused a very long error message to be
6104 recorded - for instance if somebody sent an entire SpamAssassin report back
6105 as a large number of 550 error lines. This bug was coincidentally fixed by
6106 increasing the size of one of Exim's internal buffers (big_buffer) that
6107 happened as part of the Exiscan merge. However, to be on the safe side, I
6108 have made the code more robust (and fixed the comments that describe what
6111 33. Some experimental protocols are using DNS PTR records for new purposes. The
6112 keys for these records are domain names, not reversed IP addresses. The
6113 dnsdb PTR lookup now tests whether its key is an IP address. If not, it
6114 leaves it alone. Component reversal etc. now happens only for IP addresses.
6117 34. The host_aton() function is supposed to be passed a string that is known
6118 to be a valid IP address. However, in the case of IPv6 addresses, it was
6119 not checking this. This is a hostage to fortune. Exim now panics and dies
6120 if the condition is not met. A case was found where this could be provoked
6121 from a dnsdb PTR lookup with an IPv6 address that had more than 8
6122 components; fortuitously, this particular loophole had already been fixed
6123 by change 4.50/55 or 4.44/33 above.
6125 If there are any other similar loopholes, the new check in host_aton()
6126 itself should stop them being exploited. The report I received stated that
6127 data on the command line could provoke the exploit when Exim was running as
6128 exim, but did not say which command line option was involved. All I could
6129 find was the use of -be with a bad dnsdb PTR lookup, and in that case it is
6130 running as the user.
6133 35. There was a buffer overflow vulnerability in the SPA authentication code
6134 (which came originally from the Samba project). I have added a test to the
6135 spa_base64_to_bits() function which I hope fixes it.
6138 36. The daemon start-up calls getloadavg() while still root for those OS that
6139 need the first call to be done as root, but it missed one case: when
6140 deliver_queue_load_max is set with deliver_drop_privilege. This is
6141 necessary for the benefit of the queue runner, because there is no re-exec
6142 when deliver_drop_privilege is set.
6144 37. Caching of lookup data for "hosts =" ACL conditions, when a named host list
6145 was in use, was not putting the data itself into the right store pool;
6146 consequently, it could be overwritten for a subsequent message in the same
6147 SMTP connection. (Fix 4.40/11 dealt with the non-cache case, but overlooked
6150 38. Sometimes the final signoff response after QUIT could fail to get
6151 transmitted in the non-TLS case. Testing !tls_active instead of tls_active
6152 < 0 before doing a fflush(). This bug looks as though it goes back to the
6153 introduction of TLS in release 3.20, but "sometimes" must have been rare
6154 because the tests only now provoked it.
6160 1. Fixed a longstanding but relatively impotent bug: a long time ago, before
6161 PIPELINING, the function smtp_write_command() used to return TRUE or FALSE.
6162 Now it returns an integer. A number of calls were still expecting a T/F
6163 return. Fortuitously, in all cases, the tests worked in OK situations,
6164 which is the norm. However, things would have gone wrong on any write
6165 failures on the smtp file descriptor. This function is used when sending
6166 messages over SMTP and also when doing verify callouts.
6168 2. When Exim is called to do synchronous delivery of a locally submitted
6169 message (the -odf or -odi options), it no longer closes stderr before doing
6172 3. Implemented the mua_wrapper option.
6174 4. Implemented mx_fail_domains and srv_fail_domains for the dnslookup router.
6176 5. Implemented the functions header_remove(), header_testname(),
6177 header_add_at_position(), and receive_remove_recipient(), and exported them
6180 6. If an ACL "warn" statement specified the addition of headers, Exim already
6181 inserted X-ACL-Warn: at the start if there was no header name. However, it
6182 was not making this test for the second and subsequent header lines if
6183 there were newlines in the string. This meant that an invalid header could
6184 be inserted if Exim was badly configured.
6186 7. Allow an ACL "warn" statement to add header lines at the start or after all
6187 the Received: headers, as well as at the end.
6189 8. Added the rcpt_4xx retry error code.
6191 9. Added postmaster_mailfrom=xxx to callout verification option.
6193 10. Added mailfrom=xxxx to the callout verification option, for verify=
6196 11. ${substr_1_:xxxx} and ${substr__3:xxxx} are now diagnosed as syntax errors
6197 (they previously behaved as ${substr_1_0:xxxx} and ${substr:_0_3:xxxx}).
6199 12. Inserted some casts to stop certain compilers warning when using pointer
6200 differences as field lengths or precisions in printf-type calls (mostly
6201 affecting debugging statements).
6203 13. Added optional readline() support for -be (dynamically loaded).
6205 14. Obscure bug fix: if a message error (e.g. 4xx to MAIL) happened within the
6206 same clock tick as a message's arrival, so that its received time was the
6207 same as the "first fail" time on the retry record, and that message
6208 remained on the queue past the ultimate address timeout, every queue runner
6209 would try a delivery (because it was past the ultimate address timeout) but
6210 after another failure, the ultimate address timeout, which should have then
6211 bounced the address, did not kick in. This was a "< instead of <=" error;
6212 in most cases the first failure would have been in the next clock tick
6213 after the received time, and all would be well.
6215 15. The special items beginning with @ in domain lists (e.g. @mx_any) were not
6216 being recognized when the domain list was tested by the match_domain
6217 condition in an expansion string.
6219 16. Added the ${str2b64: operator.
6221 17. Exim was always calling setrlimit() to set a large limit for the number of
6222 processes, without checking whether the existing limit was already
6223 adequate. (It did check for the limit on file descriptors.) Furthermore,
6224 errors from getrlimit() and setrlimit() were being ignored. Now they are
6225 logged to the main and panic logs, but Exim does carry on, to try to do its
6226 job under whatever limits there are.
6228 18. Imported PCRE 5.0.
6230 19. Trivial typo in log message " temporarily refused connection" (the leading
6233 20. If the log selector return_path_on_delivery was set and an address was
6234 redirected to /dev/null, the delivery process crashed because it assumed
6235 that a return path would always be set for a "successful" delivery. In this
6236 case, the whole delivery is bypassed as an optimization, and therefore no
6239 21. Internal re-arrangement: the function for sending a challenge and reading
6240 a response while authentication was assuming a zero-terminated challenge
6241 string. It's now changed to take a pointer and a length, to allow for
6242 binary data in such strings.
6244 22. Added the cyrus_sasl authenticator (code supplied by MBM).
6246 23. Exim was not respecting finduser_retries when seeking the login of the
6247 uid under which it was called; it was always trying 10 times. (The default
6248 setting of finduser_retries is zero.) Also, it was sleeping after the final
6249 failure, which is pointless.
6251 24. Implemented tls_on_connect_ports.
6253 25. Implemented acl_smtp_predata.
6255 26. If the domain in control=submission is set empty, Exim assumes that the
6256 authenticated id is a complete email address when it generates From: or
6257 Sender: header lines.
6259 27. Added "#define SOCKLEN_T int" to OS/os.h-SCO and OS/os.h-SCO_SV. Also added
6260 definitions to OS/Makefile-SCO and OS/Makefile-SCO_SV that put basename,
6261 chown and chgrp in /bin and hostname in /usr/bin.
6263 28. Exim was keeping the "process log" file open after each use, just as it
6264 does for the main log. This opens the possibility of it remaining open for
6265 long periods when the USR1 signal hits a daemon. Occasional processlog
6266 errors were reported, that could have been caused by this. Anyway, it seems
6267 much more sensible not to leave this file open at all, so that is what now
6270 29. The long-running daemon process does not normally write to the log once it
6271 has entered its main loop, and it closes the log before doing so. This is
6272 so that log files can straightforwardly be renamed and moved. However,
6273 there are a couple of unusual error situations where the daemon does write
6274 log entries, and I had neglected to close the log afterwards.
6276 30. The text of an SMTP error response that was received during a remote
6277 delivery was being truncated at 512 bytes. This is too short for some of
6278 the long messages that one sometimes sees. I've increased the limit to
6281 31. It is now possible to make retry rules that apply only when a message has a
6282 specific sender, in particular, an empty sender.
6284 32. Added "control = enforce_sync" and "control = no_enforce_sync". This makes
6285 it possible to be selective about when SMTP synchronization is enforced.
6287 33. Added "control = caseful_local_part" and "control = "caselower_local_part".
6289 32. Implemented hosts_connection_nolog.
6291 33. Added an ACL for QUIT.
6293 34. Setting "delay_warning=" to disable warnings was not working; it gave a
6296 35. Added mailbox_size and mailbox_filecount to appendfile.
6298 36. Added control = no_multiline_responses to ACLs.
6300 37. There was a bug in the logic of the code that waits for the clock to tick
6301 in the case where the clock went backwards by a substantial amount such
6302 that the microsecond fraction of "now" was more than the microsecond
6303 fraction of "then" (but the whole seconds number was less).
6305 38. Added support for the libradius Radius client library this is found on
6306 FreeBSD (previously only the radiusclient library was supported).
6312 1. When certain lookups returned multiple values in the form name=value, the
6313 quoting of the values was not always being done properly. Specifically:
6314 (a) If the value started with a double quote, but contained no whitespace,
6316 (b) If the value contained whitespace other than a space character (i.e.
6317 tabs or newlines or carriage returns) it was not quoted.
6318 This fix has been applied to the mysql and pgsql lookups by writing a
6319 separate quoting function and calling it from the lookup code. The fix
6320 should probably also be applied to nisplus, ibase and oracle lookups, but
6321 since I cannot test any of those, I have not disturbed their existing code.
6323 2. A hit in the callout cache for a specific address caused a log line with no
6324 reason for rejecting RCPT. Now it says "Previous (cached) callout
6325 verification failure".
6327 3. There was an off-by-one bug in the queryprogram router. An over-long
6328 return line was truncated at 256 instead of 255 characters, thereby
6329 overflowing its buffer with the terminating zero. As well as fixing this, I
6330 have increased the buffer size to 1024 (and made a note to document this).
6332 4. If an interrupt, such as the USR1 signal that is send by exiwhat, arrives
6333 when Exim is waiting for an SMTP response from a remote server, Exim
6334 restarts its select() call on the socket, thereby resetting its timeout.
6335 This is not a problem when such interrupts are rare. Somebody set up a cron
6336 job to run exiwhat every 2 minutes, which is less than the normal select()
6337 timeout (5 or 10 minutes). This meant that the select() timeout never
6338 kicked in because it was always reset. I have fixed this by comparing the
6339 time when an interrupt arrives with the time at the start of the first call
6340 to select(). If more time than the timeout has elapsed, the interrupt is
6341 treated as a timeout.
6343 5. Some internal re-factoring in preparation for the addition of Sieve
6344 extensions (by MH). In particular, the "personal" test is moved to a
6345 separate function, and given an option for scanning Cc: and Bcc: (which is
6346 not set for Exim filters).
6348 6. When Exim created an email address using the login of the caller as the
6349 local part (e.g. when creating a From: or Sender: header line), it was not
6350 quoting the local part when it contained special characters such as @.
6352 7. Installed new OpenBSD configuration files.
6354 8. Reworded some messages for syntax errors in "and" and "or" conditions to
6355 try to make them clearer.
6357 9. Callout options, other than the timeout value, were being ignored when
6358 verifying sender addresses in header lines. For example, when using
6360 verify = header_sender/callout=no_cache
6362 the cache was (incorrectly) being used.
6364 10. Added a missing instance of ${EXE} to the exim_install script; this affects
6365 only the Cygwin environment.
6367 11. When return_path_on_delivery was set as a log selector, if different remote
6368 addresses in the same message used different return paths and parallel
6369 remote delivery occurred, the wrong values would sometimes be logged.
6370 (Whenever a remote delivery process finished, the return path value from
6371 the most recently started remote delivery process was logged.)
6373 12. RFC 3848 specifies standard names for the "with" phrase in Received: header
6374 lines when AUTH and/or TLS are in use. This is the "received protocol"
6375 field. Exim used to use "asmtp" for authenticated SMTP, without any
6376 indication (in the protocol name) for TLS use. Now it follows the RFC and
6377 uses "esmtpa" if the connection is authenticated, "esmtps" if it is
6378 encrypted, and "esmtpsa" if it is both encrypted and authenticated. These
6379 names appear in log lines as well as in Received: header lines.
6381 13. Installed MH's patches for Sieve to add the "copy" and "vacation"
6382 extensions, and comparison tests, and to fix some bugs.
6384 14. Changes to the "personal" filter test:
6386 (1) The test was buggy in that it was just doing the equivalent of
6387 "contains" tests on header lines. For example, if a user's address was
6388 anne@some.where, the "personal" test would incorrectly be true for
6390 To: susanne@some.where
6392 This test is now done by extracting each address from the header in turn,
6393 and checking the entire address. Other tests that are part of "personal"
6394 are now done using regular expressions (for example, to check local parts
6395 of addresses in From: header lines).
6397 (2) The list of non-personal local parts in From: addresses has been
6398 extended to include "listserv", "majordomo", "*-request", and "owner-*",
6399 taken from the Sieve specification recommendations.
6401 (3) If the message contains any header line starting with "List-" it is
6402 treated as non-personal.
6404 (4) The test for "circular" in the Subject: header line has been removed
6405 because it now seems ill-conceived.
6407 15. Minor typos in src/EDITME comments corrected.
6409 16. Installed latest exipick from John Jetmore.
6411 17. If headers_add on a router specified a text string that was too long for
6412 string_sprintf() - that is, longer than 8192 bytes - Exim panicked. The use
6413 of string_sprintf() is now avoided.
6415 18. $message_body_size was not set (it was always zero) when running the DATA
6416 ACL and the local_scan() function.
6418 19. For the "mail" command in an Exim filter, no default was being set for
6419 the once_repeat time, causing a random time value to be used if "once" was
6420 specified. (If the value happened to be <= 0, no repeat happened.) The
6421 default is now 0s, meaning "never repeat". The "vacation" command was OK
6422 (its default is 7d). It's somewhat surprising nobody ever noticed this bug
6423 (I found it when inspecting the code).
6425 20. There is now an overall timeout for performing a callout verification. It
6426 defaults to 4 times the callout timeout, which applies to individual SMTP
6427 commands during the callout. The overall timeout applies when there is more
6428 than one host that can be tried. The timeout is checked before trying the
6429 next host. This prevents very long delays if there are a large number of
6430 hosts and all are timing out (e.g. when the network connections are timing
6431 out). The value of the overall timeout can be changed by specifying an
6432 additional sub-option for "callout", called "maxwait". For example:
6434 verify = sender/callout=5s,maxwait=20s
6436 21. Add O_APPEND to the open() call for maildirsize files (Exim already seeks
6437 to the end before writing, but this should make it even safer).
6439 22. Exim was forgetting that it had advertised PIPELINING for the second and
6440 subsequent messages on an SMTP connection. It was also not resetting its
6441 memory on STARTTLS and an internal HELO.
6443 23. When Exim logs an SMTP synchronization error within a session, it now
6444 records whether PIPELINING has been advertised or not.
6446 24. Added 3 instances of "(long int)" casts to time_t variables that were being
6447 formatted using %ld, because on OpenBSD (and perhaps others), time_t is int
6448 rather than long int.
6450 25. Installed the latest Cygwin configuration files from the Cygwin maintainer.
6452 26. Added the never_mail option to autoreply.
6458 1. A reorganization of the code in order to implement 4.40/8 caused a daemon
6459 crash if the getsockname() call failed; this can happen if a connection is
6460 closed very soon after it is established. The problem was simply in the
6461 order in which certain operations were done, causing Exim to try to write
6462 to the SMTP stream before it had set up the file descriptor. The bug has
6463 been fixed by making things happen in the correct order.
6469 1. If "drop" was used in a DATA ACL, the SMTP output buffer was not flushed
6470 before the connection was closed, thus losing the rejection response.
6472 2. Commented out the definition of SOCKLEN_T in os.h-SunOS5. It is needed for
6473 some early Solaris releases, but causes trouble in current releases where
6474 socklen_t is defined.
6476 3. When std{in,out,err} are closed, re-open them to /dev/null so that they
6479 4. Minor refactoring of os.c-Linux to avoid compiler warning when IPv6 is not
6482 5. Refactoring in expand.c to improve memory usage. Pre-allocate a block so
6483 that releasing the top of it at the end releases what was used for sub-
6484 expansions (unless the block got too big). However, discard this block if
6485 the first thing is a variable or header, so that we can use its block when
6486 it is dynamic (useful for very large $message_headers, for example).
6488 6. Lookups now cache *every* query, not just the most recent. A new, separate
6489 store pool is used for this. It can be recovered when all lookup caches are
6490 flushed. Lookups now release memory at the end of their result strings.
6491 This has involved some general refactoring of the lookup sources.
6493 7. Some code has been added to the store_xxx() functions to reduce the amount
6494 of flapping under certain conditions.
6496 8. log_incoming_interface used to affect only the <= reception log lines. Now
6497 it causes the local interface and port to be added to several more SMTP log
6498 lines, for example "SMTP connection from", and rejection lines.
6500 9. The Sieve author supplied some patches for the doc/README.SIEVE file.
6502 10. Added a conditional definition of _BSD_SOCKLEN_T to os.h-Darwin.
6504 11. If $host_data was set by virtue of a hosts lookup in an ACL, its value
6505 could be overwritten at the end of the current message (or the start of a
6506 new message if it was set in a HELO ACL). The value is now preserved for
6507 the duration of the SMTP connection.
6509 12. If a transport had a headers_rewrite setting, and a matching header line
6510 contained an unqualified address, that address was qualified, even if it
6511 did not match any rewriting rules. The underlying bug was that the values
6512 of the flags that permit the existence of unqualified sender and recipient
6513 addresses in header lines (set by {sender,recipient}_unqualified_hosts for
6514 non-local messages, and by -bnq for local messages) were not being
6515 preserved with the message after it was received.
6517 13. When Exim was logging an SMTP synchronization error, it could sometimes log
6518 "next input=" as part of the text comprising the host identity instead of
6519 the correct text. The code was using the same buffer for two different
6520 strings. However, depending on which order the printing function evaluated
6521 its arguments, the bug did not always show up. Under Linux, for example, my
6522 test suite worked just fine.
6524 14. Exigrep contained a use of Perl's "our" scoping after change 4.31/70. This
6525 doesn't work with some older versions of Perl. It has been changed to "my",
6526 which in any case is probably the better facility to use.
6528 15. A really picky compiler found some instances of statements for creating
6529 error messages that either had too many or two few arguments for the format
6532 16. The size of the buffer for calls to the DNS resolver has been increased
6533 from 1024 to 2048. A larger buffer is needed when performing PTR lookups
6534 for addresses that have a lot of PTR records. This alleviates a problem; it
6535 does not fully solve it.
6537 17. A dnsdb lookup for PTR records that receives more data than will fit in the
6538 buffer now truncates the list and logs the incident, which is the same
6539 action as happens when Exim is looking up a host name and its aliases.
6540 Previously in this situation something unpredictable would happen;
6541 sometimes it was "internal error: store_reset failed".
6543 18. If a server dropped the connection unexpectedly when an Exim client was
6544 using GnuTLS and trying to read a response, the client delivery process
6545 crashed while trying to generate an error log message.
6547 19. If a "warn" verb in an ACL added multiple headers to a message in a single
6548 string, for example:
6550 warn message = H1: something\nH2: something
6552 the text was added as a single header line from Exim's point of view
6553 though it ended up OK in the delivered message. However, searching for the
6554 second and subsequent header lines using $h_h2: did not work. This has been
6555 fixed. Similarly, if a system filter added multiple headers in this way,
6556 the routers could not see them.
6558 20. Expanded the error message when iplsearch is called with an invalid key to
6559 suggest using net-iplsearch in a host list.
6561 21. When running tests using -bh, any delays imposed by "delay" modifiers in
6562 ACLs are no longer actually imposed (and a message to that effect is
6565 22. If a "gecos" field in a passwd entry contained escaped characters, in
6566 particular, if it contained a \" sequence, Exim got it wrong when building
6567 a From: or a Sender: header from that name. A second bug also caused
6568 incorrect handling when an unquoted " was present following a character
6569 that needed quoting.
6571 23. "{crypt}" as a password encryption mechanism for a "crypteq" expansion item
6572 was not being matched caselessly.
6574 24. Arranged for all hyphens in the exim.8 source to be escaped with
6577 25. Change 16 of 4.32, which reversed 71 or 4.31 didn't quite do the job
6578 properly. Recipient callout cache records were still being keyed to include
6579 the sender, even when use_sender was set false. This led to far more
6580 callouts that were necessary. The sender is no longer included in the key
6581 when use_sender is false.
6583 26. Added "control = submission" modifier to ACLs.
6585 27. Added the ${base62d: operator to decode base 62 numbers.
6587 28. dnsdb lookups can now access SRV records.
6589 29. CONFIGURE_OWNER can be set at build time to define an alternative owner for
6590 the configuration file.
6592 30. The debug message "delivering xxxxxx-xxxxxx-xx" is now output in verbose
6593 (-v) mode. This makes the output for a verbose queue run more intelligible.
6595 31. Added a use_postmaster feature to recipient callouts.
6597 32. Added the $body_zerocount variable, containing the number of binary zero
6598 bytes in the message body.
6600 33. The time of last modification of the "new" subdirectory is now used as the
6601 "mailbox time last read" when there is a quota error for a maildir
6604 34. Added string comparison operators lt, lti, le, lei, gt, gti, ge, gei.
6606 35. Added +ignore_unknown as a special item in host lists.
6608 36. Code for decoding IPv6 addresses in host lists is now included, even if
6609 IPv6 support is not being compiled. This fixes a bug in which an IPv6
6610 address was recognized as an IP address, but was then not correctly decoded
6611 into binary, causing unexpected and incorrect effects when compared with
6618 1. Very minor rewording of debugging text in manualroute to say "list of
6619 hosts" instead of "hostlist".
6621 2. If verify=header_syntax was set, and a header line with an unqualified
6622 address (no domain) and a large number of spaces between the end of the
6623 name and the colon was received, the reception process suffered a buffer
6624 overflow, and (when I tested it) crashed. This was caused by some obsolete
6625 code that should have been removed. The fix is to remove it!
6627 3. When running in the test harness, delay a bit after writing a bounce
6628 message to get a bit more predictability in the log output.
6630 4. Added a call to search_tidyup() just before forking a reception process. In
6631 theory, someone could use a lookup in the expansion of smtp_accept_max_
6632 per_host which, without the tidyup, could leave open a database connection.
6634 5. Added the variables $recipient_data and $sender_data which get set from a
6635 lookup success in an ACL "recipients" or "senders" condition, or a router
6636 "senders" option, similar to $domain_data and $local_part_data.
6638 6. Moved the writing of debug_print from before to after the "senders" test
6641 7. Change 4.31/66 (moving the time when the Received: is generated) caused
6642 problems for message scanning, either using a data ACL, or using
6643 local_scan() because the Received: header was not generated till after they
6644 were called (in order to set the time as the time of reception completion).
6645 I have revised the way this works. The header is now generated after the
6646 body is received, but before the ACL or local_scan() are called. After they
6647 are run, the timestamp in the header is updated.
6653 1. Change 4.24/6 introduced a bug because the SIGALRM handler was disabled
6654 before starting a queue runner without re-exec. This happened only when
6655 deliver_drop_privilege was set or when the Exim user was set to root. The
6656 effect of the bug was that timeouts during subsequent deliveries caused
6657 crashes instead of being properly handled. The handler is now left at its
6658 default (and expected) setting.
6660 2. The other case in which a daemon avoids a re-exec is to deliver an incoming
6661 message, again when deliver_drop_privilege is set or Exim is run as root.
6662 The bug described in (1) was not present in this case, but the tidying up
6663 of the other signals was missing. I have made the two cases consistent.
6665 3. The ignore_target_hosts setting on a manualroute router was being ignored
6666 for hosts that were looked up using the /MX notation.
6668 4. Added /ignore=<ip list> feature to @mx_any, @mx_primary, and @mx_secondary
6671 5. Change 4.31/55 was buggy, and broke when there was a rewriting rule that
6672 operated on the sender address. After changing the $sender_address to <>
6673 for the sender address verify, Exim was re-instated it as the original
6674 (before rewriting) address, but remembering that it had rewritten it, so it
6675 wasn't rewriting it again. This bug also had the effect of breaking the
6676 sender address verification caching when the sender address was rewritten.
6678 6. The ignore_target_hosts option was being ignored by the ipliteral router.
6679 This has been changed so that if the ip literal address matches
6680 ignore_target_hosts, the router declines.
6682 7. Added expansion conditions match_domain, match_address, and match_local_
6683 part (NOT match_host).
6685 8. The placeholder for the Received: header didn't have a length field set.
6687 9. Added code to Exim itself and to exim_lock to test for a specific race
6688 condition that could lead to file corruption when using MBX delivery. The
6689 issue is with the lockfile that is created in /tmp. If this file is removed
6690 after a process has opened it but before that process has acquired a lock,
6691 there is the potential for a second process to recreate the file and also
6692 acquire a lock. This could lead to two Exim processes writing to the file
6693 at the same time. The added code performs the same test as UW imapd; it
6694 checks after acquiring the lock that its file descriptor still refers to
6695 the same named file.
6697 10. The buffer for building added header lines was of fixed size, 8192 bytes.
6698 It is now parameterized by HEADER_ADD_BUFFER_SIZE and this can be adjusted
6701 11. Added the smtp_active_hostname option. If used, this will typically be made
6702 to depend on the incoming interface address. Because $interface_address is
6703 not set up until the daemon has forked a reception process, error responses
6704 that can happen earlier (such as "too many connections") no longer contain
6707 12. If an expansion in a condition on a "warn" statement fails because a lookup
6708 defers, the "warn" statement is abandoned, and the next ACL statement is
6709 processed. Previously this caused the whole ACL to be aborted.
6711 13. Added the iplsearch lookup type.
6713 14. Added ident_timeout as a log selector.
6715 15. Added tls_certificate_verified as a log selector.
6717 16. Added a global option tls_require_ciphers (compare the smtp transport
6718 option of the same name). This controls incoming TLS connections.
6720 17. I finally figured out how to make tls_require_ciphers do a similar thing
6721 in GNUtls to what it does in OpenSSL, that is, set up an appropriate list
6722 before starting the TLS session.
6724 18. Tabs are now shown as \t in -bP output.
6726 19. If the log selector return_path_on_delivery was set, Exim crashed when
6727 bouncing a message because it had too many Received: header lines.
6729 20. If two routers both had headers_remove settings, and the first one included
6730 a superfluous trailing colon, the final name in the first list and the
6731 first name in the second list were incorrectly joined into one item (with a
6732 colon in the middle).
6738 1. Added -C and -D options to the exinext utility, mainly to make it easier
6739 to include in the automated testing, but these could be helpful when
6740 multiple configurations are in use.
6742 2. The exinext utility was not formatting the output nicely when there was
6743 an alternate port involved in the retry record key, nor when there was a
6744 message id as well (for retries that were specific to a specific message
6745 and a specific host). It was also confused by IPv6 addresses, because of
6746 the additional colons they contain. I have fixed the IPv4 problem, and
6747 patched it up to do a reasonable job for IPv6.
6749 3. When there is an error after a MAIL, RCPT, or DATA SMTP command during
6750 delivery, the log line now contains "pipelined" if PIPELINING was used.
6752 4. An SMTP transport process used to panic and die if the bind() call to set
6753 an explicit outgoing interface failed. This has been changed; it is now
6754 treated in the same way as a connect() failure.
6756 5. A reference to $sender_host_name in the part of a conditional expansion
6757 that was being skipped was still causing a DNS lookup. This no longer
6760 6. The def: expansion condition was not recognizing references to header lines
6761 that used bh_ and bheader_.
6763 7. Added the _cache feature to named lists.
6765 8. The code for checking quota_filecount in the appendfile transport was
6766 allowing one more file than it should have been.
6768 9. For compatibility with Sendmail, the command line option
6776 and sets the incoming protocol and host name (for trusted callers). The
6777 host name and its colon can be omitted when only the protocol is to be set.
6778 Note the Exim already has two private options, -pd and -ps, that refer to
6779 embedded Perl. It is therefore impossible to set a protocol value of "d" or
6780 "s", but I don't think that's a major issue.
6782 10. A number of refactoring changes to the code, none of which should affect
6785 (a) The number of logging options was getting close to filling up the
6786 32-bit word that was used as a bit map. I have split them into two classes:
6787 those that are passed in the argument to log_write(), and those that are
6788 only ever tested independently outside of that function. These are now in
6789 separate 32-bit words, so there is plenty of room for expansion again.
6790 There is no change in the user interface or the logging behaviour.
6792 (b) When building, for example, log lines, the code previously used a
6793 macro that called string_cat() twice, in order to add two strings. This is
6794 not really sufficiently general. Furthermore, there was one instance where
6795 it was actually wrong because one of the argument was used twice, and in
6796 one call a function was used. (As it happened, calling the function twice
6797 did not affect the overall behaviour.) The macro has been replaced by a
6798 function that can join an arbitrary number of extra strings onto a growing
6801 (c) The code for expansion conditions now uses a table and a binary chop
6802 instead of a serial search (which was left over from when there were very
6803 few conditions). Also, it now recognizes conditions like "pam" even when
6804 the relevant support is not compiled in: a suitably worded error message is
6805 given if an attempt is made to use such a condition.
6807 11. Added ${time_interval:xxxxx}.
6809 12. A bug was causing one of the ddress fields not to be passed back correctly
6810 from remote delivery subprocesses. The field in question was not being
6811 subsequently used, so this caused to problems in practice.
6813 13. Added new log selectors queue_time and deliver_time.
6815 14. Might have fixed a bug in maildirsizefile handling that threw up
6816 "unexpected character" debug warnings, and recalculated the data
6817 unnecessarily. In any case, I expanded the warning message to give more
6820 15. Added the message "Restricted characters in address" to the statements in
6821 the default ACL that block characters like @ and % in local parts.
6823 16. Change 71 for release 4.31 proved to be much less benign that I imagined.
6824 Three changes have been made:
6826 (a) There was a serious bug; a negative response to MAIL caused the whole
6827 recipient domain to be cached as invalid, thereby blocking all messages
6828 to all local parts at the same domain, from all senders. This bug has
6829 been fixed. The domain is no longer cached after a negative response to
6830 MAIL if the sender used is not empty.
6832 (b) The default behaviour of using MAIL FROM:<> for recipient callouts has
6835 (c) A new callout option, "use_sender" has been added for people who want
6836 the modified behaviour.
6842 1. Removed "EXTRALIBS=-lwrap" from OS/Makefile-Unixware7 on the advice of
6845 2. Removed "LIBS = -lresolv" from OS/Makefile-Darwin as it is not needed, and
6846 indeed breaks things for older releases.
6848 3. Added additional logging to the case where there is a problem reading data
6849 from a filter that is running in a subprocess using a pipe, in order to
6850 try to track down a specific problem.
6852 4. Testing facility fudge: when running in the test harness and attempting
6853 to connect to 10.x.x.x (expecting a connection timeout) I'm now sometimes
6854 getting "No route to host". Convert this to a timeout.
6856 5. Define ICONV_ARG2_TYPE as "char **" for Unixware7 to avoid compiler
6859 6. Some OS don't have socklen_t but use size_t instead. This affects the
6860 fifth argument of getsockopt() amongst other things. This is now
6861 configurable by a macro called SOCKLEN_T which defaults to socklen_t, but
6862 can be set for individual OS. I have set it for SunOS5, OSF1, and
6863 Unixware7. Current versions of SunOS5 (aka Solaris) do have socklen_t, but
6864 some earlier ones do not.
6866 7. Change 4.30/15 was not doing the test caselessly.
6868 8. The standard form for an IPv6 address literal was being rejected by address
6869 parsing in, for example, MAIL and RCPT commands. An example of this kind of
6870 address is [IPv6:2002:c1ed:8229:10:202:2dff:fe07:a42a]. Exim now accepts
6871 this, as well as the form without the "IPv6" on the front (but only when
6872 address literals are enabled, of course).
6874 9. Added some casts to avoid compiler warnings in OS/os.c-Linux.
6876 10. Exim crashed if a message with an empty sender address specified by -f
6877 encountered a router with an errors_to setting. This could be provoked only
6878 by a command such as
6882 where an empty string was supplied; "<>" did not hit this bug.
6884 11. Installed PCRE release 4.5.
6886 12. If EHLO/HELO was rejected by an ACL, the value of $sender_helo_name
6887 remained set. It is now erased.
6889 13. exiqgrep wasn't working on MacOS X because it didn't correctly compute
6890 times from message ids (which are base 36 rather than the normal 62).
6892 14. "Expected" SMTP protocol errors that can arise when PIPELINING is in use
6893 were being counted as actual protocol errors, and logged if the log
6894 selector +smtp_protocol_error was set. One cannot be perfect in this test,
6895 but now, if PIPELINING has been advertised, RCPT following a rejected MAIL,
6896 and DATA following a set of rejected RCPTs do not count as protocol errors.
6897 In other words, Exim assumes they were pipelined, though this may not
6898 actually be the case. Of course, in all cases the client gets an
6899 appropriate error code.
6901 15. If a lookup fails in an ACL condition, a message about the failure may
6902 be available; it is used if testing the ACL cannot continue, because most
6903 such messages specify what the cause of the deferral is. However, some
6904 messages (e.g. "MYSQL: no data found") do not cause a defer. There was bug
6905 that caused an old message to be retained and used if a later statement
6906 caused a defer, replacing the real cause of the deferral.
6908 16. If an IP address had so many PTR records that the DNS lookup buffer
6909 was not large enough to hold them, Exim could crash while trying to process
6910 the truncated data. It now detects and logs this case.
6912 17. Further to 4.21/58, another change has been made: if (and only if) the
6913 first line of a message (the first header line) ends with CRLF, a bare LF
6914 in a subsequent header line has a space inserted after it, so as not to
6915 terminate the header.
6917 18. Refactoring: tidied an ugly bit of code in appendfile that copied data
6918 unnecessarily, used atoi() instead of strtol(), and didn't check the
6919 termination when getting file sizes from file names by regex.
6921 19. Completely re-implemented the support for maildirsize files, in the light
6922 of a number of problems with the previous contributed implementation
6923 (4.30/29). In particular:
6925 . If the quota is zero, the maildirsize file is maintained, but no quota is
6928 . If the maildir directory does not exist, it is created before any attempt
6929 to write a maildirsize file.
6931 . The quota value in the file is just a cache; if the quota is changed in
6932 the transport, the new value overrides.
6934 . A regular expression is available for excluding directories from the
6937 20. The autoreply transport checks the characters in options that define the
6938 message's headers; it allows continued headers, but it was checking with
6939 isspace() after an embedded newline instead of explicitly looking for a
6942 21. If all the "regular" hosts to which an address was routed had passed their
6943 expiry times, and had not reached their retry times, the address was
6944 bounced, even if fallback hosts were defined. Now Exim should go on to try
6947 22. Increased buffer sizes in the callout code from 1024 to 4096 to match the
6948 equivalent code in the SMTP transport. Some hosts send humungous responses
6949 to HELO/EHLO, more than 1024 it seems.
6951 23. Refactoring: code in filter.c used (void *) for "any old type" but this
6952 gives compiler warnings in some environments. I've now done it "properly",
6955 24. The replacement for inet_ntoa() that is used with gcc on IRIX systems
6956 (because of problems with the built-in one) was declared to return uschar *
6957 instead of char *, causing compiler failure.
6959 25. Fixed a file descriptor leak when processing alias/forward files.
6961 26. Fixed a minor format string issue in dbfn.c.
6963 27. Typo in exim.c: ("dmbnz" for "dbmnz").
6965 28. If a filter file refered to $h_xxx or $message_headers, and the headers
6966 contained RFC 2047 "words", Exim's memory could, under certain conditions,
6969 29. When a sender address is verified, it is cached, to save repeating the test
6970 when there is more than one recipient in a message. However, when the
6971 verification involves a callout, it is possible for different callout
6972 options to be set for different recipients. It is too complicated to keep
6973 track of this in the cache, so now Exim always runs a verification when a
6974 callout is required, relying on the callout cache for the optimization.
6975 The overhead is duplication of the address routing, but this should not be
6978 30. Fixed a bug in callout caching. If a RCPT command caused the sender address
6979 to be verified with callout=postmaster, and the main callout worked but the
6980 postmaster check failed, the verification correctly failed. However, if a
6981 subsequent RCPT command asked for sender verification *without* the
6982 postmaster check, incorrect caching caused this verification also to fail,
6985 31. Exim caches DNS lookup failures so as to avoid multiple timeouts; however,
6986 it was not caching the DNS options (qualify_single, search_parents) that
6987 were used when the lookup failed. A subsequent lookup with different
6988 options therefore always gave the same answer, though there were cases
6989 where it should not have. (Example: a "domains = !$mx_any" option on a
6990 dnslookup router: the "domains" option is always processed without any
6991 widening, but the router might have qualify_single set.) Now Exim uses the
6992 cached value only when the same options are set.
6994 32. Added John Jetmore's "exipick" utility to the distribution.
6996 33. GnuTLS: When an attempt to start a TLS session fails for any reason other
6997 than a timeout (e.g. a certificate is required, and is not provided), an
6998 Exim server now closes the connection immediately. Previously it waited for
6999 the client to close - but if the client is SSL, it seems that they each
7000 wait for each other, leading to a delay before one of them times out.
7002 34: GnuTLS: Updated the code to use the new GnuTLS 1.0.0 API. I have not
7003 maintained 0.8.x compatibility because I don't think many are using it, and
7004 it is clearly obsolete.
7006 35. Added TLS support for CRLs: a tls_crl global option and one for the smtp
7009 36. OpenSSL: $tls_certificate_verified was being set to 1 even if the
7010 client certificate was expired. A simple patch fixes this, though I don't
7011 understand the full logic of why the verify callback is called multiple
7014 37. OpenSSL: a patch from Robert Roselius: "Enable client-bug workaround.
7015 Versions of OpenSSL as of 0.9.6d include a 'CBC countermeasure' feature,
7016 which causes problems with some clients (such as the Certicom SSL Plus
7017 library used by Eudora). This option, SSL_OP_DONT_INSERT_EMPTY_FRAGMENTS,
7018 disables the coutermeasure allowing Eudora to connect."
7020 38. Exim was not checking that a write() to a log file succeeded. This could
7021 lead to Bad Things if a log got too big, in particular if it hit a file
7022 size limit. Exim now panics and dies if it cannot write to a log file, just
7023 as it does if it cannot open a log file.
7025 39. Modified OS/Makefile-Linux so that it now contains
7027 CFLAGS=-O -D_FILE_OFFSET_BITS=64 -D_LARGEFILE_SOURCE
7029 The two -D definitions ensure that Exim is compiled with large file
7030 support, which makes it possible to handle log files that are bigger than
7033 40. Fixed a subtle caching bug: if (in an ACL or a set of routers, for
7034 instance) a domain was checked against a named list that involved a lookup,
7035 causing $domain_data to be set, then another domain was checked against the
7036 same list, then the first domain was re-checked, the value of $domain_data
7037 after the final check could be wrong. In particular, if the second check
7038 failed, it could be set empty. This bug probably also applied to
7041 41. The strip_trailing_dot option was not being applied to the address given
7042 with the -f command-line option.
7044 42. The code for reading a message's header from the spool was incrementing
7045 $received_count, but never initializing it. This meant that the value was
7046 incorrect (doubled) while delivering a message in the same process in which
7047 it was received. In the most common configuration of Exim, this never
7048 happens - a fresh exec is done - but it can happen when
7049 deliver_drop_privilege is set.
7051 43. When Exim logs an SMTP synchronization error - client data sent too soon -
7052 it now includes up to 150 characters of the unexpected data in the log
7055 44. The exim_dbmbuild utility uses fixed size buffers for reading input lines
7056 and building data strings. The size of both of these buffers was 10 000
7057 bytes - far larger than anybody would *ever* want, thought I. Needless to
7058 say, somebody hit the limit. I have increased the maximum line length to
7059 20 000 and the maximum data length of concatenated lines to 100 000. I have
7060 also fixed two bugs, because there was no checking on these buffers. Tsk,
7061 tsk. Now exim_dbmbuild gives a message and exits with an error code if a
7062 buffer is too small.
7064 45. The exim_dbmbuild utility did not support quoted keys, as Exim does in
7065 lsearch lookups. Now it does.
7067 46. When parsing a route_list item in a manualroute router, a fixed-length
7068 buffer was used for the list of hosts. I made this 1024 bytes long,
7069 thinking that nobody would ever have a list of hosts that long. Wrong.
7070 Somebody had a whole pile of complicated expansion conditions, and the
7071 string was silently truncated, leading to an expansion error. It turns out
7072 that it is easier to change to an unlimited length (owing to other changes
7073 that have happened since this code was originally written) than to build
7074 structure for giving a limitation error. The length of the item that
7075 expands into the list of hosts is now unlimited.
7077 47. The lsearch lookup could not handle data where the length of text line was
7078 more than 4095 characters. Such lines were truncated, leading to shortened
7079 data being returned. It should now handle lines of any length.
7081 48. Minor wording revision: "cannot test xxx in yyy ACL" becomes "cannot test
7082 xxx condition in yyy ACL" (e.g. "cannot test domains condition in DATA
7085 49. Cosmetic tidy to scripts like exicyclog that are generated by globally
7086 replacing strings such as BIN_DIRECTORY in a source file: the replacement
7087 no longer happens in comment lines. A list of replacements is now placed
7088 at the head of all of the source files, except those whose only change is
7089 to replace PERL_COMMAND in the very first #! line.
7091 50. Replaced the slow insertion sort in queue.c, for sorting the list of
7092 messages on the queue, with a bottom-up merge sort, using code contributed
7093 by Michael Haardt. This should make operations like -bp somewhat faster on
7094 large queues. It won't affect queue runners, except when queue_run_in_order
7097 51. Installed eximstats 1.31 in the distribution.
7099 52. Added support for SRV lookups to the dnslookup router.
7101 53. If an ACL referred to $message_body or $message_body_end, the value was not
7102 reset for any messages that followed in the same SMTP session.
7104 54. The store-handling optimization for building very long strings was not
7105 differentiating between the different store pools. I don't think this
7106 actually made any difference in practice, but I've tidied it.
7108 55. While running the routers to verify a sender address, $sender_address
7109 was still set to the sender address. This is wrong, because when routing to
7110 send a bounce to the sender, it would be empty. Therefore, I have changed
7111 it so that, while verifying a sender address, $sender_address is set to <>.
7112 (There is no change to what happens when verifying a recipient address.)
7114 56. After finding MX (or SRV) records, Exim was doing a DNS lookup for the
7115 target A or AAAA records (if not already returned) without resetting the
7116 qualify_single or search_parents options of the DNS resolver. These are
7117 inappropriate in this case because the targets of MX and SRV records must
7118 be FQDNs. A broken DNS record could cause trouble if it happened to have a
7119 target that, when qualified, matched something in the local domain. These
7120 two options are now turned off when doing these lookups.
7122 57. It seems that at least some releases of Reiserfs (which does not have the
7123 concept of a fixed number of inodes) returns zero and not -1 for the
7124 number of available inodes. This interacted badly with check_spool_inodes,
7125 which assumed that -1 was the "no such thing" setting. What I have done is
7126 to check that the total number of inodes is greater than zero before doing
7127 the test of how many are available.
7129 58. When a "warn" ACL statement has a log_message modifier, the message is
7130 remembered, and not repeated. This is to avoid a lot of repetition when a
7131 message has many recipients that cause the same warning to be written.
7132 However, Exim was preserving the list of already written lines for an
7133 entire SMTP session, which doesn't seem right. The memory is now reset if a
7134 new message is started.
7136 59. The "rewrite" debugging flag was not showing the result of rewriting in the
7137 debugging output unless log_rewrite was also set.
7139 60. Avoid a compiler warning on 64-bit systems in dsearch.c by avoiding the use
7140 of (int)(handle) when we know that handle contains (void *)(-1).
7142 61. The Exim daemon panic-logs an error return when it closes the incoming
7143 connection. However "connection reset by peer" seems to be common, and
7144 isn't really an error worthy of noting specially, so that particular error
7147 62. When Exim is trying to find all the local interfaces, it used to panic and
7148 die if the ioctl to get the interface flags failed. However, it seems that
7149 on at least one OS (Solaris 9) it is possible to have an interface that is
7150 included in the list of interfaces, but for which you get a failure error
7151 for this call. This happens when the interface is not "plumbed" into a
7152 protocol (i.e. neither IPv4 nor IPv6). I've changed the code so that a
7153 failure of the "get flags" call assumes that the interface is down.
7155 63. Added a ${eval10: operator, which assumes all numbers are decimal. This
7156 makes life easier for people who are doing arithmetic on fields extracted
7157 from dates, where you often get leading zeros that should not be
7158 interpreted as octal.
7160 64. Added qualify_domain to the redirect router, to override the global
7163 65. If a pathologically long header line contained very many addresses (the
7164 report of this problem mentioned 10 000) and each of them was rewritten,
7165 Exim could use up a very large amount of memory. (It kept on making new
7166 copies of the header line as it rewrote, and never released the old ones.)
7167 At the expense of a bit more processing, the header rewriting function has
7168 been changed so that it no longer eats memory in this way.
7170 66. The generation of the Received: header has been moved from the time that a
7171 message starts to be received, to the time that it finishes. The timestamp
7172 in the Received: header should now be very close to that of the <= log
7173 line. There are two side-effects of this change:
7175 (a) If a message is rejected by a DATA or non-SMTP ACL or local_scan(), the
7176 logged header lines no longer include the local Received: line, because
7177 it has not yet been created. The same applies to a copy of the message
7178 that is returned to a non-SMTP sender when a message is rejected.
7180 (b) When a filter file is tested using -bf, no additional Received: header
7181 is added to the test message. After some thought, I decided that this
7184 This change does not affect the value of $received_for. It is still set
7185 after address rewriting, but before local_scan() is called.
7187 67. Installed the latest Cygwin-specific files from the Cygwin maintainer.
7189 68. GnuTLS: If an empty file is specified for tls_verify_certificates, GnuTLS
7190 gave an unhelpful panic error message, and a defer error. I have managed to
7191 change this behaviour so that it now rejects any supplied certificate,
7192 which seems right, as the list of acceptable certificates is empty.
7194 69. OpenSSL: If an empty file is specified for tls_verify_certificates, OpenSSL
7195 gave an unhelpful defer error. I have not managed to make this reject any
7196 supplied certificates, but the error message it gives is "no certificate
7197 supplied", which is not helpful.
7199 70. exigrep's output now also includes lines that are not associated with any
7200 message, but which match the given pattern. Implemented by a patch from
7201 Martin Sluka, which also tidied up the Perl a bit.
7203 71. Recipient callout verification, like sender verification, was using <> in
7204 the MAIL FROM command. This isn't really the right thing, since the actual
7205 sender may affect whether the remote host accepts the recipient or not. I
7206 have changed it to use the actual sender in the callout; this means that
7207 the cache record is now keyed on a recipient/sender pair, not just the
7208 recipient address. There doesn't seem to be a real danger of callout loops,
7209 since a callout by the remote host to check the sender would use <>.
7210 [SEE ABOVE: changed after hitting problems.]
7212 72. Exim treats illegal SMTP error codes that do not begin with 4 or 5 as
7213 temporary errors. However, in the case of such a code being given after
7214 the end of a data transmission (i.e. after ".") Exim was failing to write
7215 a retry record for the message. (Yes, there was some broken host that was
7216 actually sending 8xx at this point.)
7218 73. An unknown lookup type in a host list could cause Exim to panic-die when
7219 the list was checked. (An example that provoked this was putting <; in the
7220 middle of a list instead of at the start.) If this happened during a DATA
7221 ACL check, a -D file could be left lying around. This kind of configuration
7222 error no longer causes Exim to die; instead it causes a defer error. The
7223 incident is still logged to the main and panic logs.
7225 74. Buglet left over from Exim 3 conversion. The message "too many messages
7226 in one connection" was written to the rejectlog but not the mainlog, except
7227 when address rewriting (yes!) was being logged.
7229 75. Added write_rejectlog option.
7231 76. When a system filter was run not as root (that is, when system_filter_user
7232 was set), the values of the $n variables were not being returned to the
7233 main process; thus, they were not subsequently available in the $sn
7236 77. Added +return_path_on_delivery log selector.
7238 78. A connection timeout was being treated differently from recipients deferred
7239 when testing hosts_max_try with a message that was older than the host's
7240 retry timeout. (The host should not be counted, thus allowing all hosts to
7241 be tried at least once before bouncing.) This may have been the cause of an
7242 occasionally reported bug whereby a message would remain on the queue
7243 longer than the retry timeout, but would be bounced if a delivery was
7244 forced. I say "may" because I never totally pinned down the problem;
7245 setting up timeout/retry tests is difficult. See also the next item.
7247 79. The ultimate address timeout was not being applied to errors that involved
7248 a combination of host plus message (for example, a timeout on a MAIL
7249 command). When an address resolved to a number of possible hosts, and they
7250 were not all tried for each delivery (e.g. because of hosts_max_try), a
7251 message could remain on the queue longer than the retry timeout.
7253 80. Sieve bug: "stop" inside "elsif" was broken. Applied a patch from Michael
7256 81. Fixed an obscure SMTP outgoing bug which required at least the following
7257 conditions: (a) there was another message waiting for the same server;
7258 (b) the server returned 5xx to all RCPT commands in the first message so
7259 that the message was not completed; (c) the server dropped the connection
7260 or gave a negative response to the RSET that Exim sends to abort the
7261 transaction. The observed case was a dropped connection after DATA that had
7262 been sent in pipelining mode. That is, the server had advertised PIPELINING
7263 but was not implementing it correctly. The effect of the bug was incorrect
7264 behaviour, such as trying another host, and this could lead to a crash.
7270 1. The 3rd arguments to getsockname(), getpeername(), and accept() in exim.c
7271 and daemon.c were passed as pointers to ints; they should have been
7272 pointers to socklen_t variables (which are typically unsigned ints).
7274 2. Some signed/unsigned type warnings in the os.c file for Linux have been
7277 3. Fixed a really odd bug that affected only the testing scheme; patching a
7278 certain fixed string in the binary changed the value of another string that
7279 happened to be identical to the end of the original first string.
7281 4. When gethostbyname() (or equivalent) is passed an IP address as a "host
7282 name", it returns that address as the IP address. On some operating
7283 systems (e.g. Solaris), it also passes back the IP address string as the
7284 "host name". However, on others (e.g. Linux), it passes back an empty
7285 string. Exim wasn't checking for this, and was changing the host name to an
7286 empty string, assuming it had been canonicalized.
7288 5. Although rare, it is permitted to have more than one PTR record for a given
7289 IP address. I thought that gethostbyaddr() or getipnodebyaddr() always gave
7290 all the names associated with an address, because they do in Solaris.
7291 However, it seems that they do not in Linux for data that comes from the
7292 DNS. If an address in /etc/hosts has multiple names, they _are_ all given.
7293 I found this out when I moved to a new Linux workstation and tried to run
7294 the Exim test suite.
7296 To get round this problem I have changed the code so that it now does its
7297 own call to the DNS to look up PTR records when searching for a host name.
7298 If nothing can be found in the DNS, it tries gethostbyaddr(), so that
7299 addresses that are only in /etc/hosts are still found.
7301 This behaviour is, however, controlled by an option called host_lookup_
7302 order, which defaults to "bydns:byaddr". If people want to use the other
7303 order, or indeed, just use one or the other means of lookup, they can
7304 specify it in this variable.
7306 6. If a PTR record yields an empty name, Exim treats it as non-existent. In
7307 some operating systems, this comes back from gethostbyaddr() as an empty
7308 string, and this is what Exim used to test for. However, it seems that in
7309 other systems, "." is yielded. Exim now tests for this case too.
7311 7. The values of check_spool_space and check_log_space are now held internally
7312 as a number of kilobytes instead of an absolute number of bytes. If a
7313 numbers is specified without 'K' or 'M', it is rounded up to the nearest
7314 kilobyte. This means that much larger values can be stored.
7316 8. Exim monitor: an attempt to get the action menu when not actually pointing
7317 at a message produces an empty menu entitled "No message selected". This
7318 works on Solaris (OpenWindows). However, XFree86 does not like a menu with
7319 no entries in it ("Shell widget menu has zero width and/or height"). So I
7320 have added a single, blank menu entry in this case.
7322 9. Added ${quote_local_part.
7324 10. MIME decoding is now applied to the contents of Subject: header lines when
7327 11. Now that a reference to $sender_host_address automatically causes a reverse
7328 lookup to occur if necessary (4.13/18), there is no need to arrange for a
7329 host lookup before query-style lookups in lists that might use this
7330 variable. This has therefore been abolished, and the "net-" prefix is no
7331 longer necessary for query-style lookups.
7333 12. The Makefile for SCO_SV contained a setting of LDFLAGS. This appears to
7334 have been a typo for LFLAGS, so it has been changed.
7336 13. The install script calls Exim with "-C /dev/null" in order to find the
7337 version number. If ALT_CONFIG_PREFIX was set, this caused an error message
7338 to be output. However, since Exim outputs its version number before the
7339 error, it didn't break the script. It just looked ugly. I fixed this by
7340 always allowing "-C /dev/null" if the caller is root.
7342 14. Ignore overlarge ACL variable number when reading spool file - insurance
7343 against a later release with more variables having written the file.
7345 15. The standard form for an IPv6 address literal was being rejected by EHLO.
7346 Example: [IPv6:2002:c1ed:8229:10:202:2dff:fe07:a42a]. Exim now accepts
7347 this, as well as the form without the "IPv6" on the front.
7349 16. Added CHOWN_COMMAND=/usr/sbin/chown and LIBS=-lresolv to the
7350 OS/Makefile-Darwin file.
7352 17. Fixed typo in lookups/ldap.c: D_LOOKUP should be D_lookup. This applied
7353 only to LDAP libraries that do not have LDAP_OPT_DEREF.
7355 18. After change 4.21/52, "%ld" was used to format the contents of the $inode
7356 variable. However, some OS use ints for inodes. I've added cast to long int
7357 to get rid of the compiler warning.
7359 19. I had forgotten to lock out "/../" in configuration file names when
7360 ALT_CONFIG_PREFIX was set.
7362 20. Routers used for verification do not need to specify transports. However,
7363 if such a router generated a host list, and callout was configured, Exim
7364 crashed, because it could not find a port number from the (non-existent)
7365 transport. It now assumes port 25 in this circumstance.
7367 21. Added the -t option to exigrep.
7369 22. If LOOKUP_LSEARCH is defined, all three linear search methods (lsearch,
7370 wildlsearch, nwildlsearch) are compiled. LOOKUP_WILDLSEARCH and LOOKUP_
7371 NWILDLSEARCH are now obsolete, but retained for compatibility. If either of
7372 them is set, LOOKUP_LSEARCH is forced.
7374 23. "exim -bV" now outputs a list of lookups that are included in the binary.
7376 24. Added sender and host information to the "rejected by local_scan()" log
7377 line; previously there was no indication of these.
7379 25. Added .include_if_exists.
7381 26. Change 3.952/11 added an explicit directory sync on top of a file sync for
7382 Linux. It turns out that not all file systems support this. Apparently some
7383 versions of NFS do not. (It's rare to put Exim's spool on NFS, but people
7384 do it.) To cope with this, the error EINVAL, which means that sync-ing is
7385 not supported on the file descriptor, is now ignored when Exim is trying to
7386 sync a directory. This applies only to Linux.
7388 27. Added -DBIND_8_COMPAT to the CLFAGS setting for Darwin.
7390 28. In Darwin (MacOS X), the PAM headers are in /usr/include/pam and not in
7391 /usr/include/security. There's now a flag in OS/os.h-Darwin to cope with
7394 29. Added support for maildirsize files from supplied patch (modified a bit).
7396 30. The use of :fail: followed by an empty string could lead Exim to respond to
7397 sender verification failures with (e.g.):
7399 550 Verification failed for <xxx>
7400 550 Sender verify failed
7402 where the first response line was missing the '-' that indicates it is not
7403 the final line of the response.
7405 31. The loop for finding the name of the user that called Exim had a hardwired
7406 limit of 10; it now uses the value of finduser_retries, which is used for
7407 all other user lookups.
7409 32. Added $received_count variable, available in data and not_smtp ACLs, and at
7412 33. Exim was neglecting to zero errno before one call of strtol() when
7413 expanding a string and expecting an integer value. On some systems this
7414 resulted in spurious "integer overflow" errors. Also, it was casting the
7415 result into an int without checking.
7417 34. Testing for a connection timeout using "timeout_connect" in the retry rules
7418 did not work. The code looks as if it has *never* worked, though it appears
7419 to have been documented since at least release 1.62. I have made it work.
7421 35. The "timeout_DNS" error in retry rules, also documented since at least
7422 1.62, also never worked. As it isn't clear exactly what this means, and
7423 clearly it isn't a major issue, I have abolished the feature by treating it
7424 as "timeout", and writing a warning to the main and panic logs.
7426 36. The display of retry rules for -brt wasn't always showing the error code
7429 37. Added new error conditions to retry rules: timeout_A, timeout_MX,
7430 timeout_connect_A, timeout_connect_MX.
7432 38. Rewriting the envelope sender at SMTP time did not allow it to be rewritten
7433 to the empty sender.
7435 39. The daemon was not analysing the content of -oX till after it had closed
7436 stderr and disconnected from the controlling terminal. This meant that any
7437 syntax errors were only noted on the panic log, and the return code from
7438 the command was 0. By re-arranging the code a little, I've made the
7439 decoding happen first, so such errors now appear on stderr, and the return
7440 code is 1. However, the actual setting up of the sockets still happens in
7441 the disconnected process, so errors there are still only recorded on the
7444 40. A daemon listener on a wildcard IPv6 socket that also accepts IPv4
7445 connections (as happens on some IP stacks) was logged at start up time as
7446 just listening for IPv6. It now logs "IPv6 with IPv4". This differentiates
7447 it from "IPv6 and IPv4", which means that two separate sockets are being
7450 41. The debug output for gethostbyname2() or getipnodebyname() failures now
7451 says whether AF_INET or AF_INET6 was passed as an argument.
7453 42. Exiwhat output was messed up when time zones were included in log
7456 43. Exiwhat now gives more information about the daemon's listening ports,
7457 and whether -tls-on-connect was used.
7459 44. The "port" option of the smtp transport is now expanded.
7461 45. A "message" modifier in a "warn" statement in a non-message ACL was being
7462 silently ignored. Now an error message is written to the main and panic
7465 46. There's a new ACL modifier called "logwrite" which writes to a log file
7466 as soon as it is encountered.
7468 47. Added $local_user_uid and $local_user_gid at routing time.
7470 48. Exim crashed when trying to verify a sender address that was being
7473 49. Exim was recognizing only a space character after ".include". It now also
7474 recognizes a tab character.
7476 50. Fixed several bugs in the Perl script that creates the exim.8 man page by
7477 extracting the relevant information from the specification. The man page no
7478 longer contains scrambled data for the -d option, and I've added a section
7479 at the front about calling Exim under different names.
7481 51. Added "extra_headers" argument to the "mail" command in filter files.
7483 52. Redirecting mail to an unqualified address in a Sieve filter caused Exim to
7486 53. Installed eximstats 1.29.
7488 54. Added transport_filter_timeout as a generic transport option.
7490 55. Exim no longer adds an empty Bcc: header to messages that have no To: or
7491 Cc: header lines. This was required by RFC 822, but it not required by RFC
7494 56. Exim used to add From:, Date:, and Message-Id: header lines to any
7495 incoming messages that did not have them. Now it does so only if the
7496 message originates locally, that is, if there is no associated remote host
7497 address. When Resent- header lines are present, this applies to the Resent-
7498 lines rather than the non-Resent- lines.
7500 57. Drop incoming SMTP connection after too many syntax or protocol errors. The
7501 limit is controlled by smtp_max_synprot_errors, defaulting to 3.
7503 58. Messages for configuration errors now include the name of the main
7504 configuration file - useful now that there may be more than one file in a
7505 list (.included file names were always shown).
7507 59. Change 4.21/82 (run initgroups() when starting the daemon) causes problems
7508 for those rare installations that do not start the daemon as root or run it
7509 setuid root. I've cut out the call to initgroups() if the daemon is not
7512 60. The Exim user and group can now be bound into the binary as text strings
7513 that are looked up at the start of Exim's processing.
7515 61. Applied a small patch for the Interbase code, supplied by Ard Biesheuvel.
7517 62. Added $mailstore_basename variable.
7519 63. Installed patch to sieve.c from Michael Haardt.
7521 64. When Exim failed to open the panic log after failing to open the main log,
7522 the original message it was trying to log was written to stderr and debug
7523 output, but if they were not available (the usual case in production), it
7524 was lost. Now it is written to syslog before the two lines that record the
7525 failures to open the logs.
7527 65. Users' Exim filters run in subprocesses under the user's uid. It is
7528 possible for a "deliver" command or an alias in a "personal" command to
7529 provoke an address rewrite. If logging of address rewriting is configured,
7530 this fails because the process is not running as root or exim. There may be
7531 a better way of dealing with this, but for the moment (because 4.30 needs
7532 to be released), I have disabled address rewrite logging when running a
7533 filter in a non-root, non-exim process.
7539 1. The buildconfig auxiliary program wasn't quoting the value set for
7540 HEADERS_CHARSET. This caused a compilation error complaining that 'ISO' was
7541 not defined. This bug was masked in 4.22 by the effect that was fixed in
7544 2. Some messages that were rejected after a message id was allocated were
7545 shown as "incomplete" by exigrep. It no longer does this for messages that
7546 are rejected by local_scan() or the DATA or non-SMTP ACLs.
7548 3. If a Message-ID: header used a domain literal in the ID, and Exim did not
7549 have allow_domain_literals set, the ID did not get logged in the <= line.
7550 Domain literals are now always recognized in Message-ID: header lines.
7552 4. The first argument for a ${extract expansion item is the key name or field
7553 number. Leading and trailing spaces in this item were not being ignored,
7554 causing some misleading effects.
7556 5. When deliver_drop_privilege was set, single queue runner processes started
7557 manually (i.e. by the command "exim -q") or by the daemon (which uses the
7558 same command in the process it spins off) were not dropping privilege.
7560 6. When the daemon running as "exim" started a queue runner, it always
7561 re-executed Exim in the spun-off process. This is a waste of effort when
7562 deliver_drop_privilege is set. The new process now just calls the
7563 queue-runner function directly.
7569 1. Typo in the src/EDITME file: it referred to HEADERS_DECODE_TO instead of
7572 2. Change 4.21/73 introduced a bug. The pid file path set by -oP was being
7573 ignored. Though the use of -oP was forcing the writing of a pid file, it
7574 was always written to the default place.
7576 3. If the message "no IP address found for host xxxx" is generated during
7577 incoming verification, it is now followed by identification of the incoming
7578 connection (so you can more easily find what provoked it).
7580 4. Bug fix for Sieve filters: "stop" inside a block was not working properly.
7582 5. Added some features to "harden" Exim a bit more against certain attacks:
7584 (a) There is now a build-time option called FIXED_NEVER_USERS that can
7585 be put in Local/Makefile. This is like the never_users runtime option,
7586 but it cannot be overridden. The default setting is "root".
7588 (b) If ALT_CONFIG_PREFIX is defined in Local/Makefile, it specifies a
7589 prefix string with which any file named in a -C command line option
7592 (c) If ALT_CONFIG_ROOT_ONLY is defined in Local/Makefile, root privilege
7593 is retained for -C and -D only if the caller of Exim is root. Without
7594 it, the exim user may also use -C and -D and retain privilege.
7596 (d) If DISABLE_D_OPTION is defined in Local/Makefile, the use of the -D
7597 command line option is disabled.
7599 6. Macro names set by the -D option must start with an upper case letter, just
7600 like macro names defined in the configuration file.
7602 7. Added "dereference=" facility to LDAP.
7604 8. Two instances of the typo "uknown" in the source files are fixed.
7606 9. If a PERL_COMMAND setting in Local/Makefile was not at the start of a line,
7607 the Configure-Makefile script screwed up while processing it.
7609 10. Incorporated PCRE 4.4.
7611 11. The SMTP synchronization check was not operating right at the start of an
7612 SMTP session. For example, it could not catch a HELO sent before the client
7613 waited for the greeting. There is now a check for outstanding input at the
7614 point when the greeting is written. Because of the duplex, asynchronous
7615 nature of TCP/IP, it cannot be perfect - the incorrect input may be on its
7616 way, but not yet received, when the check is performed.
7618 12. Added tcp_nodelay to make it possible to turn of the setting of TCP_NODELAY
7619 on TCP/IP sockets, because this apparently causes some broken clients to
7622 13. Installed revised OS/Makefile-CYGWIN and OS/os.c-cygwin (the .h file was
7623 unchanged) from the Cygwin maintainer.
7625 14. The code for -bV that shows what is in the binary showed "mbx" when maildir
7626 was supported instead of testing for mbx. Effectively a typo.
7628 15. The spa authenticator server code was not checking that the input it
7629 received was valid base64.
7631 16. The debug output line for the "set" modifier in ACLs was not showing the
7632 name of the variable that was being set.
7634 17. Code tidy: the variable type "vtype_string" was never used. Removed it.
7636 18. Previously, a reference to $sender_host_name did not cause a DNS reverse
7637 lookup on its own. Something else was needed to trigger the lookup. For
7638 example, a match in host_lookup or the need for a host name in a host list.
7639 Now, if $sender_host_name is referenced and the host name has not yet been
7640 looked up, a lookup is performed. If the lookup fails, the variable remains
7641 empty, and $host_lookup_failed is set to "1".
7643 19. Added "eqi" as a case-independent comparison operator.
7645 20. The saslauthd authentication condition could segfault if neither service
7646 nor realm was specified.
7648 21. If an overflowing value such as "2048M" was set for message_size_limit, the
7649 error message that was logged was misleading, and incoming SMTP
7650 connections were dropped. The message is now more accurate, and temporary
7651 errors are given to SMTP connections.
7653 22. In some error situations (such as 21 above) Exim rejects all SMTP commands
7654 (except RSET) with a 421 error, until QUIT is received. However, it was
7655 failing to send a response to QUIT.
7657 23. The HELO ACL was being run before the code for helo_try_verify_hosts,
7658 which made it impossible to use "verify = helo" in the HELO ACL. The HELO
7659 ACL is now run after the helo_try_verify_hosts code.
7661 24. "{MD5}" and "{SHA1}" are now recognized as equivalent to "{md5"} and
7662 "{sha1}" in the "crypteq" expansion condition (in fact the comparison is
7663 case-independent, so other case variants are also recognized). Apparently
7664 some systems use these upper case variants.
7666 25. If more than two messages were waiting for the same host, and a transport
7667 filter was specified for the transport, Exim sent two messages over the
7668 same TCP/IP connection, and then failed with "socket operation on non-
7669 socket" when it tried to send the third.
7671 26. Added Exim::debug_write and Exim::log_write for embedded Perl use.
7673 27. The extern definition of crypt16() in expand.c was not being excluded when
7674 the OS had its own crypt16() function.
7676 28. Added bounce_return_body as a new option, and bounce_return_size_limit
7677 as a preferred synonym for return_size_limit, both as an option and as an
7680 29. Added LIBS=-liconv to OS/Makefile-OSF1.
7682 30. Changed the default configuration ACL to relax the local part checking rule
7683 for addresses that are not in any local domains. For these addresses,
7684 slashes and pipe symbols are allowed within local parts, but the sequence
7685 /../ is explicitly forbidden.
7687 31. SPA server authentication was not clearing the challenge buffer before
7690 32. log_message in a "warn" ACL statement was writing to the reject log as
7691 well as to the main log, which contradicts the documentation and doesn't
7692 seem right (because no rejection is happening). So I have stopped it.
7694 33. Added Ard Biesheuvel's lookup code for accessing an Interbase database.
7695 However, I am unable to do any testing of this.
7697 34. Fixed an infelicity in the appendfile transport. When checking directories
7698 for a mailbox, to see if any needed to be created, it was accidentally
7699 using path names with one or more superfluous leading slashes; tracing
7700 would show up entries such as stat("///home/ph10", 0xFFBEEA48).
7702 35. If log_message is set on a "discard" verb in a MAIL or RCPT ACL, its
7703 contents are added to the log line that is written for every discarded
7704 recipient. (Previously a log_message setting was ignored.)
7706 36. The ${quote: operator now quotes the string if it is empty.
7708 37. The install script runs exim in order to find its version number. If for
7709 some reason other than non-existence or emptiness, which it checks, it
7710 could not run './exim', it was installing it with an empty version number,
7711 i.e. as "exim-". This error state is now caught, and the installation is
7714 38. An argument was missing from the function that creates an error message
7715 when Exim fails to connect to the socket for saslauthd authentication.
7716 This could cause Exim to crash, or give a corrupted message.
7718 39. Added isip, isip4, and isip6 to ${if conditions.
7720 40. The ACL variables $acl_xx are now saved with the message, and can be
7721 accessed later in routers, transports, and filters.
7723 41. The new lookup type nwildlsearch is like wildlsearch, except that the key
7724 strings in the file are not string-expanded.
7726 42. If a MAIL command specified a SIZE value that was too large to fit into an
7727 int variable, the check against message_size_limit failed. Such values are
7728 now forced to INT_MAX, which is around 2Gb for a 32-bit variable. Maybe one
7729 day this will have to be increased, but I don't think I want to be around
7730 when emails are that large.
7737 1. Removed HAVE_ICONV=yes from OS/Makefile-FreeBSD, since it seems that
7738 iconv() is not standard in FreeBSD.
7740 2. Change 4.21/17 was buggy and could cause stack overwriting on a system with
7741 IPv6 enabled. The observed symptom was a segmentation fault on return from
7742 the function os_common_find_running_interfaces() in src/os.c.
7744 3. In the check_special_case() function in daemon.c I had used "errno" as an
7745 argument name, which causes warnings on some systems. This was basically a
7746 typo, since it was named "eno" in the comments!
7748 4. The code that waits for the clock to tick (at a resolution of some fraction
7749 of a second) so as to ensure message-id uniqueness was always waiting for
7750 at least one whole tick, when it could have waited for less. [This is
7751 almost certainly not relevant at current processor speeds, where it is
7752 unlikely to ever wait at all. But we try to future-proof.]
7754 5. The function that sleeps for a time interval that includes fractions of a
7755 second contained a race. It did not block SIGALRM between setting the
7756 timer, and suspending (a couple of lines later). If the interval was short
7757 and the sigsuspend() was delayed until after it had expired, the suspension
7758 never ended. On busy systems this could lead to processes getting stuck for
7761 6. Some uncommon configurations may cause a lookup to happen in a queue runner
7762 process, before it forks any delivery processes. The open lookup caching
7763 mechanism meant that the open file or database connection was passed into
7764 the delivery process. The problem was that delivery processes always tidy
7765 up cached lookup data. This could cause a problem for the next delivery
7766 process started by the queue runner, because the external queue runner
7767 process does not know about the closure. So the next delivery process
7768 still has data in the lookup cache. In the case of a file lookup, there was
7769 no problem because closing a file descriptor in a subprocess doesn't affect
7770 the parent. However, if the lookup was caching a connection to a database,
7771 the connection was closed, and the second delivery process was likely to
7772 see errors such as "PGSQL: query failed: server closed the connection
7773 unexpectedly". The problem has been fixed by closing all cached lookups
7774 in a queue runner before running a delivery process.
7776 7. Compiler warning on Linux for the second argument of iconv(), which doesn't
7777 seem to have the "const" qualifier which it has on other OS. I've
7780 8. Change 4.21/2 was too strict. It is only if there are two authenticators
7781 *of the same type* (client or server) with the same public name that an
7782 error should be diagnosed.
7784 9. When Exim looked up a host name for an IP address, but failed to find the
7785 original IP address when looking up the host name (a safety check), it
7786 output the message "<ip address> does not match any IP for NULL", which was
7787 confusing, to say the least. The bug was that the host name should have
7788 appeared instead of "NULL".
7790 10. Since release 3.03, if Exim is called by a uid other than root or the Exim
7791 user that is built into the binary, and the -C or -D options is used, root
7792 privilege is dropped before the configuration file is read. In addition,
7793 logging is switched to stderr instead of the normal log files. If the
7794 configuration then re-defines the Exim user, the unprivileged environment
7795 is probably not what is expected, so Exim logs a panic warning message (but
7798 However, if deliver_drop_privilege is set, the unprivileged state may well
7799 be exactly what is intended, so the warning has been cut out in that case,
7800 and Exim is allowed to try to write to its normal log files.
7806 1. smtp_return_error_details was not giving details for temporary sender
7807 or receiver verification errors.
7809 2. Diagnose a configuration error if two authenticators have the same public
7812 3. Exim used not to create the message log file for a message until the first
7813 delivery attempt. This could be confusing when incoming messages were held
7814 for policy or load reasons. The message log file is now created at the time
7815 the message is received, and an initial "Received" line is written to it.
7817 4. The automatically generated man page for command line options had a minor
7818 bug that caused no ill effects; however, a more serious problem was that
7819 the procedure for building the man page automatically didn't always
7820 operate. Consequently, release 4.20 contains an out-of-date version. This
7821 shouldn't happen again.
7823 5. When building Exim with embedded Perl support, the script that builds the
7824 Makefile was calling 'perl' to find its compile-time parameters, ignoring
7825 any setting of PERL_COMMAND in Local/Makefile. This is now fixed.
7827 6. The freeze_tell option was not being used for messages that were frozen on
7828 arrival, either by an ACL or by local_scan().
7830 7. Added the smtp_incomplete_transaction log selector.
7832 8. After STARTTLS, Exim was not forgetting that it had advertised AUTH, so it
7833 was accepting AUTH without a new EHLO.
7835 9. Added tls_remember_esmtp to cope with YAEB. This allows AUTH and other
7836 ESMTP extensions after STARTTLS without a new EHLO, in contravention of the
7839 10. Logging of TCP/IP connections (when configured) now happens in the main
7840 daemon process instead of the child process, so that the TCP/IP connection
7841 count is more accurate (but it can never be perfect).
7843 11. The use of "drop" in a nested ACL was not being handled correctly in the
7844 outer ACL. Now, if condition failure induced by the nested "drop" causes
7845 the outer ACL verb to deny access ("accept" or "discard" after "endpass",
7846 or "require"), the connection is dropped.
7848 12. Similarly, "discard" in a nested ACL wasn't being handled. A nested ACL
7849 that yield "discard" can now be used with an "accept" or a "discard" verb,
7850 but an error is generated for any others (because I can't see a useful way
7851 to define what should happen).
7853 13. When an ACL is read dynamically from a file (or anywhere else), the lines
7854 are now processed in the same way as lines in the Exim configuration file.
7855 In particular, continuation lines are supported.
7857 14. Added the "dnslists = a.b.c!=n.n.n.n" feature.
7859 15. Added -ti meaning -t -i.
7861 16. Check for letters, digits, hyphens, and dots in the names of dnslist
7862 domains, and warn by logging if others are found.
7864 17. At least on BSD, alignment is not guaranteed for the array of ifreq's
7865 returned from GIFCONF when Exim is trying to find the list of interfaces on
7866 a host. The code in os.c has been modified to copy each ifreq to an aligned
7867 structure in all cases.
7869 Also, in some cases, the returned ifreq's were being copied to a 'struct
7870 ifreq' on the stack, which was subsequently passed to host_ntoa(). That
7871 means the last couple of bytes of an IPv6 address could be chopped if the
7872 ifreq contained only a normal sockaddr (14 bytes storage).
7874 18. Named domain lists were not supported in the hosts_treat_as_local option.
7875 An entry such as +xxxx was not recognized, and was treated as a literal
7878 19. Ensure that header lines added by a DATA ACL are included in the reject log
7879 if the ACL subsequently rejects the message.
7881 20. Upgrade the cramtest.pl utility script to use Digest::MD5 instead of just
7882 MD5 (which is deprecated).
7884 21. When testing a filter file using -bf, Exim was writing a message when it
7885 took the sender from a "From " line in the message, but it was not doing so
7886 when it took $return_path from a Return-Path: header line. It now does.
7888 22. If the contents of a "message" modifier for a "warn" ACL verb do not begin
7889 with a valid header line field name (a series of printing characters
7890 terminated by a colon, Exim now inserts X-ACL-Warn: at the beginning.
7892 23. Changed "disc" in the source to "disk" to conform to the documentation and
7893 the book and for uniformity.
7895 24. Ignore Sendmail's -Ooption=value command line item.
7897 25. When execve() failed while trying to run a command in a pipe transport,
7898 Exim was returning EX_UNAVAILABLE (69) from the subprocess. However, this
7899 could be confused with a return value of 69 from the command itself. This
7900 has been changed to 127, the value the shell returns if it is asked to run
7901 a non-existent command. The wording for the related log line suggests a
7902 non-existent command as the problem.
7904 26. If received_header_text expands to an empty string, do not add a Received:
7905 header line to the message. (Well, it adds a token one on the spool, but
7906 marks it "old" so that it doesn't get used or transmitted.)
7908 27. Installed eximstats 1.28 (addition of -nt option).
7910 28. There was no check for failure on the call to getsockname() in the daemon
7911 code. This can fail if there is a shortage of resources on the system, with
7912 ENOMEM, for example. A temporary error is now given on failure.
7914 29. Contrary to the C standard, it seems that in some environments, the
7915 equivalent of setlocale(LC_ALL, "C") is not obeyed at the start of a C
7916 program. Exim now does this explicitly; it affects the formatting of
7917 timestamps using strftime().
7919 30. If exiqsumm was given junk data, it threw up some uninitialized variable
7920 complaints. I've now initialized all the variables, to avoid this.
7922 32. Header lines added by a system filter were not being "seen" during
7923 transport-time rewrites.
7925 33. The info_callback() function passed to OpenSSL is set up with type void
7926 (*)(SSL *, int, int), as described somewhere. However, when calling the
7927 function (actually a macro) that sets it up, the type void(*)() is
7928 expected. I've put in a cast to prevent warnings from picky compilers.
7930 34. If a DNS black list lookup found a CNAME record, but there were no A
7931 records associated with the domain it pointed at, Exim crashed.
7933 35. If a DNS black list lookup returned more than one A record, Exim ignored
7934 all but the first. It now scans all returned addresses if a particular IP
7935 value is being sought. In this situation, the contents of the
7936 $dnslist_value variable are a list of all the addresses, separated by a
7939 36. Tightened up the rules for host name lookups using reverse DNS. Exim used
7940 to accept a host name and all its aliases if the forward lookup for any of
7941 them yielded the IP address of the incoming connection. Now it accepts only
7942 those names whose forward lookup yields the correct IP address. Any other
7943 names are discarded. This closes a loophole whereby a rogue DNS
7944 administrator could create reverse DNS records to break through a
7945 wildcarded host restriction in an ACL.
7947 37. If a user filter or a system filter that ran in a subprocess used any of
7948 the numerical variables ($1, $2 etc), or $thisaddress, in a pipe command,
7949 the wrong values were passed to the pipe command ($thisaddress had the
7950 value of $0, $0 had the value of $1, etc). This bug was introduced by
7951 change 4.11/101, and not discovered because I wrote an inadequate test. :-(
7953 38. Improved the line breaking for long SMTP error messages from ACLs.
7954 Previously, if there was no break point between 40 and 75 characters, Exim
7955 left the rest of the message alone. Two changes have been made: (a) I've
7956 reduced the minimum length to 35 characters; (b) if it can't find a break
7957 point between 35 and 75 characters, it looks ahead and uses the first one
7958 that it finds. This may give the occasional overlong line, but at least the
7959 remaining text gets split now.
7961 39. Change 82 of 4.11 was unimaginative. It assumed the limit on the number of
7962 file descriptors might be low, and that setting 1000 would always raise it.
7963 It turns out that in some environments, the limit is already over 1000 and
7964 that lowering it causes trouble. So now Exim takes care not to decrease it.
7966 40. When delivering a message, the value of $return_path is set to $sender_
7967 address at the start of routing (routers may change the value). By an
7968 oversight, this default was not being set up when an address was tested by
7969 -bt or -bv, which affected the outcome if any router or filter referred to
7972 41. The idea of the "warn" ACL verb is that it adds a header or writes to the
7973 log only when "message" or "log_message" are set. However, if one of the
7974 conditions was an address verification, or a call to a nested ACL, the
7975 messages generated by the underlying test were being passed through. This
7976 no longer happens. The underlying message is available in $acl_verify_
7977 message for both "message" and "log_message" expansions, so it can be
7978 passed through if needed.
7980 42. Added RFC 2047 interpretation of header lines for $h_ expansions, with a
7981 new expansion $bh_ to give the encoded byte string without charset
7982 translation. Translation happens only if iconv() is available; HAVE_ICONV
7983 indicates this at build time. HEADERS_CHARSET gives the charset to
7984 translate to; headers_charset can change it in the configuration, and
7985 "headers charset" can change it in an individual filter file.
7987 43. Now that we have a default RFC 2047 charset (see above), the code in Exim
7988 that creates RFC 2047 encoded "words" labels them as that charset instead
7989 of always using iso-8859-1. The cases are (i) the explicit ${rfc2047:
7990 expansion operator; (ii) when Exim creates a From: line for a local
7991 message; (iii) when a header line is rewritten to include a "phrase" part.
7993 44. Nasty bug in exiqsumm: the regex to skip already-delivered addresses was
7994 buggy, causing it to skip the first lines of messages whose message ID
7995 ended in 'D'. This would not have bitten before Exim release 4.14, because
7996 message IDs were unlikely to end in 'D' before then. The effect was to have
7997 incorrect size information for certain domains.
7999 45. #include "config.h" was missing at the start of the crypt16.c module. This
8000 caused trouble on Tru64 (aka OSF1) systems, because HAVE_CRYPT16 was not
8003 46. If there was a timeout during a "random" callout check, Exim treated it as
8004 a failure of the random address, and carried on sending RSET and the real
8005 address. If the delay was just some slowness somewhere, the response to the
8006 original RCPT would be taken as a response to RSET and so on, causing
8007 mayhem of various kinds.
8009 47. Change 50 for 4.20 was a heap of junk. I don't know what I was thinking
8010 when I implemented it. It didn't allow for the fact that some option values
8011 may legitimately be negative (e.g. size_addition), and it didn't even do
8012 the right test for positive values.
8014 48. Domain names in DNS records are case-independent. Exim always looks them up
8015 in lower case. Some resolvers return domain names in exactly the case they
8016 appear in the zone file, that is, they may contain uppercase letters. Not
8017 all resolvers do this - some return always lower case. Exim was treating a
8018 change of case by a resolver as a change of domain, similar to a widening
8019 of a domain abbreviation. This triggered its re-routing code and so it was
8020 trying to route what was effectively the same domain again. This normally
8021 caused routing to fail (because the router wouldn't handle the domain
8022 twice). Now Exim checks for this case specially, and just changes the
8023 casing of the domain that it ultimately uses when it transmits the message
8026 49. Added Sieve (RFC 3028) support, courtesy of Michael Haardt's contributed
8029 50. If a filter generated a file delivery with a non-absolute name (possible if
8030 no home directory exists for the router), the forbid_file option was not
8033 51. Added '&' feature to dnslists, to provide bit mask matching in addition to
8034 the existing equality matching.
8036 52. Exim was using ints instead of ino_t variables in some places where it was
8037 dealing with inode numbers.
8039 53. If TMPDIR is defined in Local/Makefile (default in src/EDITME is
8040 TMPDIR="/tmp"), Exim checks for the presence of an environment variable
8041 called TMPDIR, and if it finds it is different, it changes its value.
8043 54. The smtp_printf() function is now made available to local_scan() so
8044 additional output lines can be written before returning. There is also an
8045 smtp_fflush() function to enable the detection of a dropped connection.
8046 The variables smtp_input and smtp_batched_input are exported to
8049 55. Changed the default runtime configuration: the message "Unknown user"
8050 has been removed from the ACL, and instead placed on the localuser router,
8051 using the cannot_route_message feature. This means that any verification
8052 failures that generate their own messages won't get overridden. Similarly,
8053 the "Unrouteable address" message that was in the ACL for unverifiable
8054 relay addresses has also been removed.
8056 56. Added hosts_avoid_esmtp to the smtp transport.
8058 57. The exicyclog script was not checking for the esoteric option
8059 CONFIGURE_FILE_USE_EUID in the Local/Makefile. It now does this, but it
8060 will work only if exicyclog is run under the appropriate euid.
8062 58. Following a discussion on the list, the rules by which Exim recognises line
8063 endings on incoming messages have been changed. The -dropcr and drop_cr
8064 options are now no-ops, retained only for backwards compatibility. The
8065 following line terminators are recognized: LF CRLF CR. However, special
8066 processing applies to CR:
8068 (i) The sequence CR . CR does *not* terminate an incoming SMTP message,
8069 nor a local message in the state where . is a terminator.
8071 (ii) If a bare CR is encountered in a header line, an extra space is added
8072 after the line terminator so as not to end the header. The reasoning
8073 behind this is that bare CRs in header lines are most likely either
8074 to be mistakes, or people trying to play silly games.
8076 59. The size of a message, as listed by "-bp" or in the Exim monitor window,
8077 was being incorrectly given as 18 bytes larger than it should have been.
8078 This is a VOB (very old bug).
8080 60. This may never have affected anything current, but just in case it has:
8081 When the local host is found other than at the start of a list of hosts,
8082 the local host, those with the same MX, and any that follow, are discarded.
8083 When the list in question was part of a longer list of hosts, the following
8084 hosts (not currently being processed) were also being discarded. This no
8085 longer happens. I'm not sure if this situation could ever has previously
8088 61. Added the "/MX" feature to lists of hosts in the manualroute and query
8091 62. Whenever Exim generates a new message, it now adds an Auto-Submitted:
8092 header. This is something that is recommended in a new Internet Draft, and
8093 is something that is documented as being done by Sendmail. There are two
8094 possible values. For messages generated by the autoreply transport, Exim
8097 Auto-Submitted: auto-replied
8099 whereas for all other generated messages (e.g. bounces) it adds
8101 Auto-Submitted: auto-generated
8103 63. The "personal" condition in filters now includes a test for the
8104 Auto-Submitted: header. If it contains the string "auto-" the message it
8105 not considered personal.
8107 64. Added rcpt_include_affixes as a generic transport option.
8109 65. Added queue_only_override (default true).
8111 66. Added the syslog_duplication option.
8113 67. If what should have been the first header line of a message consisted of
8114 a space followed by a colon, Exim was mis-interpreting it as a header line.
8115 It isn't of course - it is syntactically invalid and should therefore be
8116 treated as the start of the message body. The misbehaviour could have
8117 caused a number of strange effects, including loss of data in subsequent
8118 header lines, and spool format errors.
8120 68. Formerly, the AUTH parameter on a MAIL command was trusted only if the
8121 client host had authenticated. This control can now be exercised by an ACL
8122 for more flexibility.
8124 69. By default, callouts do not happen when testing with -bh. There is now a
8125 variant, -bhc, which does actually run the callout code, including
8126 consulting and updating the callout cache.
8128 70. Added support for saslauthd authentication, courtesy of Alexander
8131 71. If statvfs() failed on the spool or log directories while checking their
8132 size for availability, Exim confusingly gave the error "space shortage".
8133 Furthermore, in debugging mode it crashed with a floating point exception.
8134 These checks are done if check_{spool,log}_{space,inodes} are set, and when
8135 an SMTP message arrives with SIZE= on the MAIL command. As this is a really
8136 serious problem, Exim now writes to the main and panic logs when this
8137 happens, with details of the failure. It then refuses to accept the
8138 incoming message, giving the message "spool directory problem" or "log
8139 directory problem" with a 421 code for SMTP messages.
8141 72. When Exim is about to re-exec itself, it ensures that the file descriptors
8142 0, 1, and 2 exist, because some OS complain for execs without them (see
8143 ChangeLog 4.05/30). If necessary, Exim opens /dev/null to use for these
8144 descriptors. However, the code omitted to check that the open succeeded,
8145 causing mysterious errors if for some reason the permissions on /dev/null
8146 got screwed. Now Exim writes a message to the main and panic logs, and
8147 bombs out if it can't open /dev/null.
8149 73. Re-vamped the way daemon_smtp_port, local_interfaces, and -oX work and
8150 interact so that it is all more flexible. It is supposed to remain
8151 backwards compatible. Also added extra_local_interfaces.
8153 74. Invalid data sent to a SPA (NTLM) server authenticator could cause the code
8154 to bomb out with an assertion failure - to the client this appears as a
8155 connection drop. This problem occurs in the part of the code that was taken
8156 from the Samba project. Fortunately, the assertion is in a very simple
8157 function, so I have fixed this by reproducing the function inline in the
8158 one place where it is called, and arranging for authentication to fail
8159 instead of killing the process with assert().
8161 75. The SPA client code was not working when the server requested OEM rather
8162 than Unicode encoding.
8164 76. Added code to make require_files with a specific uid setting more usable in
8165 the case where statting the file as root fails - usually a non-root-mounted
8166 NFS file system. When this happens and the failure is EACCES, Exim now
8167 forks a subprocess and does the per-uid checking as the relevant uid.
8169 77. Added process_log_path.
8171 78. If log_file_path was not explicitly set, a setting of check_log_space or
8172 check_log_inodes was ignored.
8174 79. If a space check for the spool or log partitions fails, the incident is now
8175 logged. Of course, in the latter case the data may get lost...
8177 80. Added the %p formatting code to string_format() so that it can be used to
8178 print addresses in debug_print(). Adjusted all the address printing in the
8179 debugging in store.c to use %p rather than %d.
8181 81. There was a concern that a line of code in smtp_in.c could overflow a
8182 buffer if a HELO/EHLO command was given followed by 500 or so spaces. As
8183 initially expressed, the concern was not well-founded, because trailing
8184 spaces are removed early. However, if the trailing spaces were followed by
8185 a NULL, they did not get removed, so the overflow was possible. Two fixes
8188 (a) I re-wrote the offending code in a cleaner fashion.
8189 (b) If an incoming SMTP command contains a NULL character, it is rejected
8192 82. When Exim changes uid/gid to the Exim user at daemon start time, it now
8193 runs initgroups(), so that if the Exim user is in any additional groups,
8194 they will be used during message reception.
8200 The change log for 4.20 and earlier releases has been archived.
git://git.exim.org / exim.git / blob