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.
65 JH/01 Bug 1329: Fix format of Maildir-format filenames to match other mail-
66 related applications. Previously an "H" was used where available info
67 says that "M" should be, so change to match.
69 JH/02 Bug 2587: Fix pam expansion condition. Tainted values are commonly used
70 as arguments, so an implementation trying to copy these into a local
71 buffer was taking a taint-enforcement trap. Fix by using dynamically
72 created buffers. Similar fix for radius expansion condition.
74 JH/03 Bug 2586: Fix listcount expansion operator. Using tainted arguments is
75 reasonable, eg. to count headers. Fix by using dynamically created
76 buffers rather than a local. Do similar fixes for ACL actions "dcc",
77 "log_reject_target", "malware" and "spam"; the arguments are expanded
78 so could be handling tainted values.
80 JH/04 Bug 2590: Fix -bi (newaliases). A previous code rearrangement had
81 broken the (no-op) support for this sendmail command. Restore it
82 to doing nothing, silently, and returning good status.
84 JH/05 Bug 2593: Fix "vacation" in Exim filter. Previously, when a "once"
85 record path was given (or the default used) without a leading directory
86 path, an error occurred on trying to open it. Use the transport's working
89 JH/06 Bug 2594: Change the name used for certificate name checks in the smtp
90 transport. Previously it was the name on the DNS A-record; use instead
91 the head of the CNAME chain leading there (if there is one). This seems
92 to align better with RFC 6125.
94 JH/07 Bug 2597: Fix a resource leak. Using a lookup in obtaining a value for
95 smtp_accept_max_per_host allocated resources which were not released
96 when the limit was exceeded. This eventually crashed the daemon. Fix
97 by adding a release action in that path.
99 JH/08 Bug 2598: Fix verify ACL condition. The options for the condition are
100 expanded; previously using tainted values was rejected. Fix by using
101 dynamically-created buffers.
103 JH/09 Relax restrictions on ACL verify condition needing access to message
104 headers. Previously they were only permitted in data and non-smtp ACLs;
105 permit also mime, dkim, prdr quit and notquit. Applies to header-syntax,
106 not_blind, header_sender and header_names_ascii verification.
108 JH/10 Bug 2603: Fix coding of string copying to only evaluate arguments once.
109 Previously a macro used one argument twice; when called with the
110 argument as an expression having side-effects, incorrect operation
111 resulted. Use an inlineable function.
113 JH/11 Bug 2604: Fix request to cutthrough-deliver when a connection is already
114 held open for a verify callout. Previously this wan not accounted for
115 and a corrupt onward SMTP conversation resulted.
117 JH/12 Bug 2607: Fix the ${srs_encode } expansion to handle quoted local_parts.
118 Previously they were embedded naively in the constructed address; when
119 needed, strip the quoting and quote the entire local_part.
120 Also make the inbound_srs expansion condition handle quoting.
122 JH/13 Fix dsearch "subdir" filter to ignore ".". Previously only ".." was
123 excluded, not matching the documentation.
125 JH/14 Bug 2606: Fix a segfault in sqlite lookups. When no, or a bad, filename
126 was given for the sqlite_dbfile a trap resulted.
128 JH/15 Bug 2620: Fix "spam" ACL condition. Previously, tainted values for the
129 "name" argument resulted in a trap. There is no reason to disallow such;
130 this was a coding error.
132 JH/16 Bug 2615: Fix pause during message reception, on systems that have been
133 suspended/resumed. The Linux CLOCK_MONOTONIC does not account for time
134 spent suspended, ignoring the POSIX definition. Previously we assumed
135 it did and a constant offset from real time could be used as a correction.
136 Change to using the same clock source for the start-of-message and the
137 post-message next-tick-wait. Also change to using CLOCK_BOOTTIME if it
138 exists, just to get a clock slightly more aligned to reality.
140 JH/17 Bug 2295: Fix DKIM signing to always semicolon-terminate. Although the
141 RFC says it is optional some validators care. The missing char was not
142 intended but triggered by a line-wrap alignment. Discovery and fix by
143 Guillaume Outters, hacked on by JH.
145 JH/18 Bug 2617: Fix a taint trap in parse_fix_phrase(). Previously when the
146 name being quoted was tainted a trap would be taken. Fix by using
147 dynamically created buffers. The routine could have been called by a
148 rewrite with the "h" flag, by using the "-F" command-line option, or
149 by using a "name=" option on a control=submission ACL modifier.
151 JH/19 SPF: change the Authentication-Results expansion component to give
152 smtp.helo when the sender domain is empty. Previously it gave
155 JH/20 Bug 2631: ACL dnslist conditions now ignore and log any lookups returns
156 not in 127.0.0.0/8 to help in spotting list domains taken over by a
157 domain-parking registrar.
159 JH/21 Bug 2630: Fix eol-replacement string for the ${readsocket } expansion.
160 Previously when a whitespace character was specified it was not inserted
161 after removing the newline.
163 JH/22 Bug 2265: Force SNI usage for smtp transport DANE'd connections, to be
164 the domain part of the recipient address. This overrides any tls_sni
165 option set, which was previously used.
167 JH/23 Logging: with the +tls_sni log_selector, do not wrap the received SNI
170 JH/24 Bug 2634: Fix a taint trap seen on NetBSD: the testing coded for
171 is_tainted() had an off-by-one error in the overenthusiastic direction.
172 Find and fix by Gavan. Although NetBSD is not a supported platform for
173 4.94 this bug could affect other platforms.
175 PP/01 Fix default prime selection to be consistent.
176 One path used ike23 still, instead of exim.dev.20160529.3; now both
177 execution flows will use the same DH primes (currently
178 exim.dev.20160529.3).
180 JH/25 OpenSSL: Fix back-compatibility behaviour surrounding tls_certificates
181 option in smtp transport, to match the documentation. Previously
182 verification was not being done in some cases where it should have been.
184 JH/26 Bug 2646: fix a memory usage issue in ldap lookups. Previously, when more
185 than one server was defined and depending on the platform memory layout
186 details, an internal consistency trap could be hit while walking the list
189 JH/27 Bug 2648: fix the passing of an authenticator public-name through spool
190 files. The value is used by the authresults expansion item. Previously
191 if this was used in a router or transport, a crash could result.
193 JH/28 Fix spurious logging of select error. Some platforms, notably FreeBSD,
194 have a sufficient incidence of EINTR returns from select that an
195 interaction with other operations done by the main daemon loop exposed
196 a bug in the error-handling. This was benign apart from the log
199 JH/29 Bug 2675: add outgoing-interface I= element to deferred "==" log lines,
200 for consistency with delivered "=>" and failed "**" lines. While we're
201 there, handle PRX and TFO.
203 JH/30 Bug 2677: fix matching of long addresses. Since 4.93 a limit of 256 was
204 applied. This resulted, if any header-line rewrite rules were configured,
205 in a panic-log triggerable by sending a message with a long address in
206 a header. Fix by increasing the arbitrary limit to larger than a single
207 (dewrapped) 5322 header line maximum size.
209 JH/31 The ESMTP option name advertised for the SUPPORT_EARLY_PIPE build option
210 is changed from X_PIPE_CONNECT to PIPE_CONNECT. This is in line with
211 RFC 6648 which deprecates X- options in protocols as a general practice.
212 Changeover between the implementations is handled by the mechanisms
215 JH/32 Bug 2599: fix delay of delivery to a local address where there is also
216 a remote which uses callout/hold. Previously the local was queued.
218 JH/33 Fix a taint trap in the ${listextract } expansion when the source data
221 JH/34 Fix the placement of a multiple-message delivery marker in the delivery
222 log line. The asterisk is now consistently appended to the remote IP
223 (and port, if given), and will also be provided on defer and fail log
224 lines. Previously it could be placed on the local IP if that was being
225 logged, and was only provided on delivery lines.
227 JH/35 Bug 2343: Harden exim_tidydb against corrupt wait- files.
229 JH/36 Bug 2687: Fix interpretation of multiple ^ chars in a plaintext
230 authenticator client_send option. Previously the next char, after a pair
231 was collapsed, was taken verbatim (so ^^^foo became ^^foo; ^^^^foo became
232 ^^\x00foo). Fixed to get ^\x00foo and ^^foo respectively to match the
233 documentation. There is still no way to get a leading ^ immediately
234 after a NUL (ie. for the password of a PLAIN method authenticator.
236 JH/37 Enforce the expected size, for fixed-size records read from hints-DB
237 files. For bad sizes read, delete the record and whine to paniclog.
239 JH/38 When logging an AUTH failure, as server, do not include sensitive
240 information. Previously, the credentials would be included if given
241 as part of the AUTH command line and an ACL denied authentication.
243 JH/39 Bug 2691: fix $local_part_data. When the matching list element
244 referred to a file, bad data was returned. This likely also affected
247 JH/40 The gsasl authenticator now supports caching of the salted password
248 generated by the client-side implementation. This required the addition
249 of a new variable: $auth4.
251 JH/41 Fix daemon SIGHUP on FreeBSD. Previously, a named socket for IPC was
252 left undeleted; the attempt to re-create it then failed - resulting in
253 the usual "SIGHUP tp have daemon reload configuration" to not work.
254 This affected any platform not supporting "abstract" Unix-domain
255 sockets (i.e. not Linux).
257 JH/42 Bug 2693: Harden against a peer which reneges on a 452 "too many
258 recipients" response to RCPT in a later response, with a 250. The
259 previous coding assumed this would not happen, and under PIPELINING
260 would result in both lost and duplicate recipients for a message.
262 JH/43 Bug 2694: Fix weighted distribution of work to multiple spamd servers.
263 Previously the weighting was incorrectly applied. Similar fix for socks
264 proxies. Found and fixed by Heiko Schlichting.
266 JH/44 Bug 2701: Fix list-expansion of dns_ipv4_lookup. Previously, it did
267 not handle sub-lists included using the +namedlist syntax. While
268 investigating, the same found for dns_trust_aa, dns_again_means_nonexist,
269 dnssec_require_domains, dnssec_request_domains, srv_fail_domains,
272 JH/45 Use a (new) separate store pool-pair for DKIM verify working data.
273 Previously the permanent pool was used, so the sore could not be freed.
274 This meant a connection with many messages would use continually-growing
277 JH/46 Use an exponentially-increasing block size when malloc'ing store. Do it
278 per-pool so as not to waste too much space. Previously a constant size
279 was used which resulted in O(n^2) behaviour; now we get O(n log n) making
280 DOS attacks harder. The cost is wasted memory use in the larger blocks.
282 JH/47 Use explicit alloc/free for DNS lookup workspace. This permits using the
283 same space repeatedly, and a smaller process footprint.
285 JH/48 Use a less bogus-looking filename for a temporary used for DH-parameters
286 for GnuTLS. Previously the name started "%s" which, while not a bug,
287 looked as if if might be one.
289 JH/49 Bug 2710: when using SOCKS for additional messages after the first (a
290 "continued connection") make the $proxy_* variables available. Previously
291 the information was not passed across the exec() call for subsequent
292 transport executions. This also mean that the log lines for the
293 messages can show the proxy information.
295 JH/50 Bug 2672: QT elements in log lines, unless disabled, now exclude the
296 receive time. With modern systems the difference is significant.
297 The historical behaviour can be restored by disabling (a new) log_selector
298 "queue_time_exclusive".
300 JH/51 Taint-check ACL line. Previously, only filenames (for out-of-line ACL
301 content) were specifically tested for. Now, also cover expansions
302 resulting in ACL names and inline ACL content.
304 JH/52 Fix ${ip6norm:} operator. Previously, any trailing line text was dropped,
305 making it unusable in complex expressions.
307 JH/53 Bug 2743: fix immediate-delivery via named queue. Previously this would
308 fail with a taint-check on the spoolfile name, and leave the message
311 HS/01 Enforce absolute PID file path name.
313 HS/02 Handle SIGINT as we handle SIGTERM: terminate the Exim process.
315 PP/01 Add a too-many-bad-recipients guard to the default config's RCPT ACL.
317 PP/02 Bug 2643: Correct TLS DH constants.
318 A missing NUL termination in our code-generation tool had led to some
319 incorrect Diffie-Hellman constants in the Exim source.
320 Reported by kylon94, code-gen tool fix by Simon Arlott.
322 PP/03 Impose security length checks on various command-line options.
323 Fixes CVE-2020-SPRSS reported by Qualys.
325 PP/04 Fix Linux security issue CVE-2020-SLCWD and guard against PATH_MAX
326 better. Reported by Qualys.
328 PP/05 Fix security issue CVE-2020-PFPSN and guard against cmdline invoker
329 providing a particularly obnoxious sender full name.
332 PP/06 Fix CVE-2020-28016 (PFPZA): Heap out-of-bounds write in parse_fix_phrase()
334 PP/07 Refuse to allocate too little memory, block negative/zero allocations.
337 PP/08 Change default for recipients_max from unlimited to 50,000.
339 PP/09 Fix security issue with too many recipients on a message (to remove a
340 known security problem if someone does set recipients_max to unlimited,
341 or if local additions add to the recipient list).
342 Fixes CVE-2020-RCPTL reported by Qualys.
344 PP/10 Fix security issue in SMTP verb option parsing
345 Fixes CVE-2020-EXOPT reported by Qualys.
347 PP/11 Fix security issue in BDAT state confusion.
348 Ensure we reset known-good where we know we need to not be reading BDAT
349 data, as a general case fix, and move the places where we switch to BDAT
350 mode until after various protocol state checks.
351 Fixes CVE-2020-BDATA reported by Qualys.
353 HS/03 Die on "/../" in msglog file names
355 QS/01 Creation of (database) files in $spool_dir: only uid=0 or the uid of
356 the Exim runtime user are allowed to create files.
358 QS/02 PID file creation/deletion: only possible if uid=0 or uid is the Exim
361 QS/03 When reading the output from interpreted forward files we do not
362 pass the pipe between the parent and the interpreting process to
363 executed child processes (if any).
365 QS/04 Always die if requested from internal logging, even is logging is
368 JH/54 DMARC: recent versions of the OpenDMARC library appear to have broken
369 the API; compilation noo longer completes with DMARC support included.
370 This affects 1.4.1-1 on Fedora 33 (1.3.2-3 is functional); and has
371 been reported on other platforms.
373 JH/55 TLS: as server, reject connections with ALPN indicating non-smtp use.
375 JH/56 Make the majority of info read from config files readonly, for defence-in-
376 depth against exploits. Suggestion by Qualys.
377 Not supported on Solaris 10.
379 JH/57 Fix control=fakreject for a custom message containing tainted data.
380 Previously this resulted in a log complaint, due to a re-expansion present
381 since fakereject was originally introduced.
383 JH/58 GnuTLS: Fix certextract expansion. If a second modifier after a tag
384 modifier was given, a loop resulted.
386 JH/59 DKIM: Fix small-message verification under TLS with chunking. If a
387 pipelined SMTP command followed the BDAT LAST then it would be
388 incorrectly treated as part of the message body, causing a verification
391 JH/60 Bug 2805: Fix logging of domain-literals in Message_ID: headers. They
392 require looser validation rules than those for 821-level addresses,
393 which only permit IP addresses.
399 JH/01 Avoid costly startup code when not strictly needed. This reduces time
400 for some exim process initialisations. It does mean that the logging
401 of TLS configuration problems is only done for the daemon startup.
403 JH/02 Early-pipelining support code is now included unless disabled in Makefile.
405 JH/03 DKIM verification defaults no long accept sha1 hashes, to conform to
406 RFC 8301. They can still be enabled, using the dkim_verify_hashes main
409 JH/04 Support CHUNKING from an smtp transport using a transport_filter, when
410 DKIM signing is being done. Previously a transport_filter would always
411 disable CHUNKING, falling back to traditional DATA.
413 JH/05 Regard command-line recipients as tainted.
415 JH/06 Bug 340: Remove the daemon pid file on exit, when due to SIGTERM.
417 JH/07 Bug 2489: Fix crash in the "pam" expansion condition. It seems that the
418 PAM library frees one of the arguments given to it, despite the
419 documentation. Therefore a plain malloc must be used.
421 JH/08 Bug 2491: Use tainted buffers for the transport smtp context. Previously
422 on-stack buffers were used, resulting in a taint trap when DSN information
423 copied from a received message was written into the buffer.
425 JH/09 Bug 2493: Harden ARC verify against Outlook, whick has been seen to mix
426 the ordering of its ARC headers. This caused a crash.
428 JH/10 Bug 2492: Use tainted memory for retry record when needed. Previously when
429 a new record was being constructed with information from the peer, a trap
432 JH/11 Bug 2494: Unset the default for dmarc_tld_file. Previously a naiive
433 installation would get error messages from DMARC verify, when it hit the
434 nonexistent file indicated by the default. Distros wanting DMARC enabled
435 should both provide the file and set the option.
436 Also enforce no DMARC verification for command-line sourced messages.
438 JH/12 Fix an uninitialised flag in early-pipelining. Previously connections
439 could, depending on the platform, hang at the STARTTLS response.
441 JH/13 Bug 2498: Reset a counter used for ARC verify before handling another
442 message on a connection. Previously if one message had ARC headers and
443 the following one did not, a crash could result when adding an
444 Authentication-Results: header.
446 JH/14 Bug 2500: Rewind some of the common-coding in string handling between the
447 Exim main code and Exim-related utities. The introduction of taint
448 tracking also did many adjustments to string handling. Since then, eximon
449 frequently terminated with an assert failure.
451 JH/15 When PIPELINING, synch after every hundred or so RCPT commands sent and
452 check for 452 responses. This slightly helps the inefficieny of doing
453 a large alias-expansion into a recipient-limited target. The max_rcpt
454 transport option still applies (and at the current default, will override
455 the new feature). The check is done for either cause of synch, and forces
456 a fast-retry of all 452'd recipients using a new MAIL FROM on the same
457 connection. The new facility is not tunable at this time.
459 JH/16 Fix the variables set by the gsasl authenticator. Previously a pointer to
460 library live data was being used, so the results became garbage. Make
461 copies while it is still usable.
463 JH/17 Logging: when the deliver_time selector ise set, include the DT= field
464 on delivery deferred (==) and failed (**) lines (if a delivery was
465 attemtped). Previously it was only on completion (=>) lines.
467 JH/18 Authentication: the gsasl driver not provides the $authN variables in time
468 for the expansion of the server_scram_iter and server_scram_salt options.
470 WB/01 SPF: DNS lookups for the obsolete SPF RR type done by the libspf2 library
471 are now specifically given a NO_DATA response without hitting the system
472 resolver. The library goes on to do the now-standard TXT lookup.
473 Use of dnsdb lookups is not affected.
475 JH/19 Bug 2507: Modules: on handling a dynamic-module (lookups) open failure,
476 only retrieve the errormessage once. Previously two calls to dlerror()
477 were used, and the second one (for mainlog/paniclog) retrieved null
480 JH/20 Taint checking: disallow use of tainted data for
481 - the appendfile transport file and directory options
482 - the pipe transport command
483 - the autoreply transport file, log and once options
484 - file names used by the redirect router (including filter files)
486 - paths used by single-key lookups
487 Previously this was permitted.
489 JH/21 Bug 2501: Fix init call in the heimdal authenticator. Previously it
490 adjusted the size of a major service buffer; this failed because the
491 buffer was in use at the time. Change to a compile-time increase in the
492 buffer size, when this authenticator is compiled into exim.
494 JH/22 Taint-checking: move to safe-mode taint checking on all platforms. The
495 previous fast-mode was untenable in the face of glibs using mmap to
496 support larger malloc requests.
498 PP/01 Update the openssl_options possible values through OpenSSL 1.1.1c.
499 New values supported, if defined on system where compiled:
500 allow_no_dhe_kex, cryptopro_tlsext_bug, enable_middlebox_compat,
501 no_anti_replay, no_encrypt_then_mac, prioritize_chacha, tlsext_padding
503 JH/23 Performance improvement in the initial phase of a two-pass queue run. By
504 running a limited number of proceses in parallel, a benefit is gained. The
505 amount varies with the platform hardware and load. The use of the option
506 queue_run_in_order means we cannot do this, as ordering becomes
509 JH/24 Bug 2524: fix the cyrus_sasl auth driver gssapi usage. A previous fix
510 had introduced a string-copy (for ensuring NUL-termination) which was not
511 appropriate for that case, which can include embedded NUL bytes in the
512 block of data. Investigation showed the copy to actually be needless, the
513 data being length-specified.
515 JH/25 Fix use of concurrent TLS connections under GnuTLS. When a callout was
516 done during a receiving connection, and both used TLS, global info was
517 used rather than per-connection info for tracking the state of data
518 queued for transmission. This could result in a connection hang.
520 JH/26 Fix use of the SIZE parameter on MAIL commands, on continued connections.
521 Previously, when delivering serveral messages down a single connection
522 only the first would provide a SIZE. This was due to the size information
523 not being properly tracked.
525 JH/27 Bug 2530: When operating in a timezone with sub-minute offset, such as
526 TAI (at 37 seconds currently), pretend to be in UTC for time-related
527 expansion and logging. Previously, spurious values such as a future
528 minute could be seen.
530 JH/28 Bug 2533: Fix expansion of ${tr } item. When called in some situations
531 it could crash from a null-deref. This could also affect the
532 ${addresses: } operator and ${readsock } item.
534 JH/29 Bug 2537: Fix $mime_part_count. When a single connection had a non-mime
535 message following a mime one, the variable was not reset.
537 JH/30 When an pipelined-connect fails at the first response, assume incorrect
538 cached capability (perhaps the peer reneged?) and immediately retry in
541 JH/31 Fix spurious detection of timeout while writing to transport filter.
543 JH/32 Bug 2541: Fix segfault on bad cmdline -f (sender) argument. Previously
544 an attempt to copy the string was made before checking it.
546 JH/33 Fix the dsearch lookup to return an untainted result. Previously the
547 taint of the lookup key was maintained; we now regard the presence in the
548 filesystem as sufficient validation.
550 JH/34 Fix the readsocket expansion to not segfault when an empty "options"
551 argument is supplied.
553 JH/35 The dsearch lookup now requires that the directory is an absolute path.
554 Previously this was not checked, and nonempty relative paths made an
555 access under Exim's current working directory.
557 JH/36 Bug 2554: Fix msg:defer event for the hosts_max_try_hardlimit case.
558 Previously no event was raised.
560 JH/37 Bug 2552: Fix the check on spool space during reception to use the SIZE
561 parameter supplied by the sender MAIL FROM command. Previously it was
562 ignored, and only the check_spool_space option value for the required
565 JH/38 Fix $dkim_key_length. This should, after a DKIM verification, present
566 the size of the signing public-key. Previously it was instead giving
567 the size of the signature hash.
569 JH/39 DKIM verification: the RFC 8301 restriction on sizes of RSA keys is now
570 the default. See the (new) dkim_verify_min_keysizes option.
572 JH/40 Fix a memory-handling bug: when a connection carried multiple messages
573 and an ACL use a lookup for checking either the local_part or domain,
574 stale data could be accessed. Ensure that variable references are
575 dropped between messages.
577 JH/41 Bug 2571: Fix SPA authenticator. Running as a server, an offset supplied
578 by the client was not checked as pointing within response data before
579 being used. A malicious client could thus cause an out-of-bounds read and
580 possibly gain authentication. Fix by adding the check.
582 JH/42 Internationalisation: change the default for downconversion in the smtp
583 transport to be "if needed". Previously it was "as previously set" for
584 the message, which usually meant "if needed" for message-submission but
585 "no" for everything else. However, MTAs have been seen using SMTPUTF8
586 even when the envelope addresses did not need it, resulting in forwarding
587 failures to non-supporting MTAs. A downconvert in such cases will be
588 a no-op on the addresses, merely dropping the use of SMTPUTF8 by the
589 transport. The change does mean that addresses needing conversion will
590 be converted when previously a delivery failure would occur.
592 JH/43 Fix possible long line in DSN. Previously when a very long SMTP error
593 response was received it would be used unchecked in a fail-DSN, violating
594 standards on line-length limits. Truncate if needed.
596 HS/01 Remove parameters of the link to www.open-spf.org. The linked form
597 doesn't work. (Additionally add a new main config option to configure the
604 JH/01 OpenSSL: With debug enabled output keying information sufficient, server
605 side, to decode a TLS 1.3 packet capture.
607 JH/02 OpenSSL: Suppress the sending of (stateful) TLS1.3 session tickets.
608 Previously the default library behaviour applied, sending two, each in
611 JH/03 Debug output for ACL now gives the config file name and line number for
614 JH/04 The default received_header_text now uses the RFC 8314 tls cipher clause.
616 JH/05 DKIM: ensure that dkim_domain elements are lowercased before use.
618 JH/06 Fix buggy handling of autoreply bounce_return_size_limit, and a possible
619 buffer overrun for (non-chunking) other transports.
621 JH/07 GnuTLS: Our use of late (post-handshake) certificate verification, under
622 TLS1.3, means that a server rejecting a client certificate is not visible
623 to the client until the first read of encrypted data (typically the
624 response to EHLO). Add detection for that case and treat it as a failed
625 TLS connection attempt, so that the normal retry-in-clear can work (if
626 suitably configured).
628 JB/01 Bug 2375: fix expansions of 822 addresses having comments in local-part
629 and/or domain. Found and fixed by Jason Betts.
631 JH/08 Add hardening against SRV & TLSA lookups the hit CNAMEs (a nonvalid
632 configuration). If a CNAME target was not a wellformed name pattern, a
635 JH/09 Logging: Fix initial listening-on line for multiple ports for an IP when
636 the OS reports them interleaved with other addresses.
638 JH/10 OpenSSL: Fix aggregation of messages. Previously, when PIPELINING was
639 used both for input and for a verify callout, both encrypted, SMTP
640 responses being sent by the server could be lost. This resulted in
641 dropped connections and sometimes bounces generated by a peer sending
644 JH/11 Harden plaintext authenticator against a badly misconfigured client-send
645 string. Previously it was possible to cause undefined behaviour in a
646 library routine (usually a crash). Found by "zerons".
648 JH/12 Bug 2384: fix "-bP smtp_receive_timeout". Previously it returned no
651 JH/13 Bug 2386: Fix builds with Dane under LibreSSL 2.9.0 onward. Some old
652 API was removed, so update to use the newer ones.
654 JH/14 Bug 1891: Close the log file if receiving a non-smtp message, without
655 any timeout set, is taking a long time. Previously we would hang on to a
656 rotated logfile "forever" if the input was arriving with long gaps
657 (a previous attempt to fix addressed lack, for a long time, of initial
660 HS/01 Bug 2390: Use message_id for tempfile creation to avoid races in a
661 shared (NFS) environment. The length of the tempfile name is now
662 4 + 16 ("hdr.$message_exim_id") which might break on file
663 systems which restrict the file name length to lower values.
666 HS/02 Bug 2390: Use message_id for tempfile creation to avoid races in a
667 shared (NFS) environment.
669 HS/03 Bug 2392: exigrep does case sensitive *option* processing (as it
670 did for all versions <4.90). Notably -M, -m, --invert, -I may be
673 JH/15 Use unsigned when creating bitmasks in macros, to avoid build errors
674 on some platforms for bit 31.
676 JH/16 GnuTLS: rework ciphersuite strings under recent library versions. Thanks
677 to changes apparently associated with TLS1.3 handling some of the APIs
678 previously used were either nonfunctional or inappropriate. Strings
679 like TLS1.3:ECDHE_SECP256R1__RSA_PSS_RSAE_SHA256__AES_256_GCM__AEAD:256
680 and TLS1.2:ECDHE_SECP256R1__RSA_SHA256__AES_128_CBC__SHA256:128 replace
681 the previous TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256 .
682 This affects log line X= elements, the $tls_{in,out}_cipher variables,
683 and the use of specific cipher names in the encrypted= ACL condition.
685 JH/17 OpenSSL: the default openssl_options now disables ssl_v3.
687 JH/18 GnuTLS: fix $tls_out_ocsp under hosts_request_ocsp. Previously the
688 verification result was not updated unless hosts_require_ocsp applied.
690 JH/19 Bug 2398: fix listing of a named-queue. Previously, even with the option
691 queue_list_requires_admin set to false, non-admin users were denied the
694 JH/20 Bug 2389: fix server advertising of usable certificates, under GnuTLS in
695 directory-of-certs mode. Previously they were advertised despite the
698 JH/21 The smtp transport option "hosts_noproxy_tls" is now unset by default.
699 A single TCP connection by a client will now hold a TLS connection open
700 for multiple message deliveries, by default. Previously the default was to
703 JH/22 The smtp transport option "hosts_try_dane" now enables all hosts by
704 default. If built with the facility, DANE will be used. The facility
705 SUPPORT_DANE is now enabled in the prototype build Makefile "EDITME".
707 JH/23 The build default is now for TLS to be included; the SUPPORT_TLS define
708 is replaced with DISABLE_TLS. Either USE_GNUTLS or (the new) USE_OPENSSL
709 must be defined and you must still, unless you define DISABLE_TLS, manage
710 the the include-dir and library-file requirements that go with that
711 choice. Non-TLS builds are still supported.
713 JH/24 Fix duplicated logging of peer name/address, on a transport connection-
716 JH/25 The smtp transport option "hosts_try_fastopen" now enables all hosts by
717 default. If the platform supports and has the facility enabled, it will
718 be requested on all coneections.
720 JH/26 The PIPE_CONNECT facility is promoted from experimental status and is now
721 controlled by the build-time option SUPPORT_PIPE_CONNECT.
723 PP/01 Unbreak heimdal_gssapi, broken in 4.92.
725 JH/27 Bug 2404: Use the main-section configuration option "dsn_from" for
726 success-DSN messages. Previously the From: header was always the default
727 one for these; the option was ignored.
729 JH/28 Fix the timeout on smtp response to apply to the whole response.
730 Previously it was reset for every read, so a teergrubing peer sending
731 single bytes within the time limit could extend the connection for a
732 long time. Credit to Qualsys Security Advisory Team for the discovery.
734 JH/29 Fix DSN Final-Recipient: field. Previously it was the post-routing
735 delivery address, which leaked information of the results of local
736 forwarding. Change to the original envelope recipient address, per
739 JH/30 Bug 2411: Fix DSN generation when RFC 3461 failure notification is
740 requested. Previously not bounce was generated and a log entry of
741 error ignored was made.
743 JH/31 Avoid re-expansion in ${sort } expansion. (CVE-2019-13917)
745 JH/32 Introduce a general tainting mechanism for values read from the input
746 channel, and values derived from them. Refuse to expand any tainted
747 values, to catch one form of exploit.
749 JH/33 Bug 2413: Fix dkim_strict option. Previously the expansion result
750 was unused and the unexpanded text used for the test. Found and
751 fixed by Ruben Jenster.
753 JH/34 Fix crash after TLS shutdown. When the TCP/SMTP channel was left open,
754 an attempt to use a TLS library read routine dereffed a nul pointer,
757 JH/35 Bug 2409: filter out-of-spec chars from callout response before using
758 them in our smtp response.
760 JH/36 Have the general router option retry_use_local_part default to true when
761 any of the restrictive preconditions are set (to anything). Previously it
762 was only for check_local user. The change removes one item of manual
763 configuration which is required for proper retries when a remote router
764 handles a subset of addresses for a domain.
766 JH/37 Appendfile: when evaluating quota use (non-quota_size_regex) take the file
767 link count into consideration.
769 HS/04 Fix handling of very log lines in -H files. If a -<key> <value> line
770 caused the extension of big_buffer, the following lines were ignored.
772 JH/38 Bug 1395: Teach the DNS negative-cache about TTL value from the SOA in
773 accordance with RFC 2308. Previously there was no expiry, so a longlived
774 receive process (eg. due to ACL delays) versus a short SOA value could
777 HS/05 Handle trailing backslash gracefully. (CVE-2019-15846)
779 JH/39 Promote DMARC support to mainline.
781 JH/40 Bug 2452: Add a References: header to DSNs.
783 JH/41 With GnuTLS 3.6.0 (and later) do not attempt to manage Diffie-Hellman
784 parameters. The relevant library call is documented as "Deprecated: This
785 function is unnecessary and discouraged on GnuTLS 3.6.0 or later. Since
786 3.6.0, DH parameters are negotiated following RFC7919."
788 HS/06 Change the default of dnssec_request_domains to "*"
790 JH/42 Bug 2545: Fix CHUNKING for all RCPT commands rejected. Previously we
791 carried on and emitted a BDAT command, even when PIPELINING was not
794 JH/43 Bug 2465: Fix taint-handling in dsearch lookup. Previously a nontainted
795 buffer was used for the filename, resulting in a trap when tainted
796 arguments (eg. $domain) were used.
798 JH/44 With OpenSSL 1.1.1 (onwards) disable renegotiation for TLS1.2 and below;
799 recommended to avoid a possible server-load attack. The feature can be
800 re-enabled via the openssl_options main cofiguration option.
802 JH/45 local_scan API: documented the current smtp_printf() call. This changed
803 for version 4.90 - adding a "more data" boolean to the arguments.
804 Bumped the ABI version number also, this having been missed previously;
805 release versions 4.90 to 4.92.3 inclusive were effectively broken in
806 respect of usage of smtp_printf() by either local_scan code or libraries
807 accessed via the ${dlfunc } expansion item. Both will need coding
808 adjustment for any calls to smtp_printf() to match the new function
809 signature; a FALSE value for the new argument is always safe.
811 JH/46 FreeBSD: fix use of the sendfile() syscall. The shim was not updating
812 the file-offset (which the Linux syscall does, and exim expects); this
813 resulted in an indefinite loop.
815 JH/47 ARC: fix crash in signing, triggered when a configuration error failed
816 to do ARC verification. The Authentication-Results: header line added
817 by the configuration then had no ARC item.
819 JH/48 Bug 2784: fix shutdown=no in the ${readsocket) expansion item. Previously
820 an incorrect mode was used for reading the result, resulting in it being
827 JH/01 Remove code calling the customisable local_scan function, unless a new
828 definition "HAVE_LOCAL_SCAN=yes" is present in the Local/Makefile.
830 JH/02 Bug 1007: Avoid doing logging from signal-handlers, as that can result in
831 non-signal-safe functions being used.
833 JH/03 Bug 2269: When presented with a received message having a stupidly large
834 number of DKIM-Signature headers, disable DKIM verification to avoid
835 a resource-consumption attack. The limit is set at twenty.
837 JH/04 Add variables $arc_domains, $arc_oldest_pass for ARC verify. Fix the
838 report of oldest_pass in ${authres } in consequence, and separate out
839 some descriptions of reasons for verification fail.
841 JH/05 Bug 2273: Cutthrough delivery left a window where the received messsage
842 files in the spool were present and unlocked. A queue-runner could spot
843 them, resulting in a duplicate delivery. Fix that by doing the unlock
844 after the unlink. Investigation by Tim Stewart. Take the opportunity to
845 add more error-checking on spoolfile handling while that code is being
848 PP/01 Refuse to open a spool data file (*-D) if it's a symlink.
849 No known attacks, no CVE, this is defensive hardening.
851 JH/06 Bug 2275: The MIME ACL unlocked the received message files early, and
852 a queue-runner could start a delivery while other operations were ongoing.
853 Cutthrough delivery was a common victim, resulting in duplicate delivery.
854 Found and investigated by Tim Stewart. Fix by using the open message data
855 file handle rather than opening another, and not locally closing it (which
856 releases a lock) for that case, while creating the temporary .eml format
857 file for the MIME ACL. Also applies to "regex" and "spam" ACL conditions.
859 JH/07 Bug 177: Make a random-recipient callout success visible in ACL, by setting
860 $sender_verify_failure/$recipient_verify_failure to "random".
862 JH/08 When generating a selfsigned cert, use serial number 1 since zero is not
865 JH/09 Bug 2274: Fix logging of cmdline args when starting in an unlinked cwd.
866 Previously this would segfault.
868 JH/10 Fix ARC signing for case when DKIM signing failed. Previously this would
871 JH/11 Bug 2264: Exim now only follows CNAME chains one step by default. We'd
872 like zero, since the resolver should be doing this for us, But we need one
873 as a CNAME but no MX presence gets the CNAME returned; we need to check
874 that doesn't point to an MX to declare it "no MX returned" rather than
875 "error, loop". A new main option is added so the older capability of
876 following some limited number of chain links is maintained.
878 JH/12 Add client-ip info to non-pass iprev ${authres } lines.
880 JH/13 For receent Openssl versions (1.1 onward) use modern generic protocol
881 methods. These should support TLS 1.3; they arrived with TLS 1.3 and the
882 now-deprecated earlier definitions used only specified the range up to TLS
883 1.2 (in the older-version library docs).
885 JH/14 Bug 2284: Fix DKIM signing for body lines starting with a pair of dots.
887 JH/15 Rework TLS client-side context management. Stop using a global, and
888 explicitly pass a context around. This enables future use of TLS for
889 connections to service-daemons (eg. malware scanning) while a client smtp
890 connection is using TLS; with cutthrough connections this is quite likely.
892 JH/16 Fix ARC verification to do AS checks in reverse order.
894 JH/17 Support a "tls" option on the ${readsocket } expansion item.
896 JH/18 Bug 2287: Fix the protocol name (eg utf8esmtp) for multiple messages
897 using the SMTPUTF8 option on their MAIL FROM commands, in one connection.
898 Previously the "utf8" would be re-prepended for every additional message.
900 JH/19 Reject MAIL FROM commands with SMTPUTF8 when the facility was not advertised.
901 Previously thery were accepted, resulting in issues when attempting to
902 forward messages to a non-supporting MTA.
904 PP/02 Let -n work with printing macros too, not just options.
906 JH/20 Bug 2296: Fix cutthrough for >1 address redirection. Previously only
907 one parent address was copied, and bogus data was used at delivery-logging
908 time. Either a crash (after delivery) or bogus log data could result.
909 Discovery and analysis by Tim Stewart.
911 PP/03 Make ${utf8clean:} expansion operator detect incomplete final character.
912 Previously if the string ended mid-character, we did not insert the
913 promised '?' replacement.
915 PP/04 Documentation: current string operators work on bytes, not codepoints.
917 JH/21 Change as many as possible of the global flags into one-bit bitfields; these
918 should pack well giving a smaller memory footprint so better caching and
919 therefore performance. Group the declarations where this can't be done so
920 that the byte-sized flag variables are not interspersed among pointer
921 variables, giving a better chance of good packing by the compiler.
923 JH/22 Bug 1896: Fix the envelope from for DMARC forensic reports to be possibly
924 non-null, to avoid issues with sites running BATV. Previously reports were
925 sent with an empty envelope sender so looked like bounces.
927 JH/23 Bug 2318: Fix the noerror command within filters. It wasn't working.
928 The ignore_error flag wasn't being returned from the filter subprocess so
929 was not set for later routers. Investigation and fix by Matthias Kurz.
931 JH/24 Bug 2310: Raise a msg:fail:internal event for each undelivered recipient,
932 and a msg:complete for the whole, when a message is manually removed using
933 -Mrm. Developement by Matthias Kurz, hacked on by JH.
935 JH/25 Avoid fixed-size buffers for pathnames in DB access. This required using
936 a "Gnu special" function, asprintf() in the DB utility binary builds; I
937 hope that is portable enough.
939 JH/26 Bug 2311: Fix DANE-TA verification under GnuTLS. Previously it was also
940 requiring a known-CA anchor certificate; make it now rely entirely on the
941 TLSA as an anchor. Checking the name on the leaf cert against the name
942 on the A-record for the host is still done for TA (but not for EE mode).
944 JH/27 Fix logging of proxy address. Previously, a pointless "PRX=[]:0" would be
945 included in delivery lines for non-proxied connections, when compiled with
946 SUPPORT_SOCKS and running with proxy logging enabled.
948 JH/28 Bug 2314: Fire msg:fail:delivery event even when error is being ignored.
949 Developement by Matthias Kurz, tweaked by JH. While in that bit of code,
950 move the existing event to fire before the normal logging of message
951 failure so that custom logging is bracketed by normal logging.
953 JH/29 Bug 2322: A "fail" command in a non-system filter (file) now fires the
954 msg:fail:internal event. Developement by Matthias Kurz.
956 JH/30 Bug 2329: Increase buffer size used for dns lookup from 2k, which was
957 far too small for todays use of crypto signatures stored there. Go all
958 the way to the max DNS message size of 64kB, even though this might be
959 overmuch for IOT constrained device use.
961 JH/31 Fix a bad use of a copy function, which could be used to pointlessly
962 copy a string over itself. The library routine is documented as not
963 supporting overlapping copies, and on MacOS it actually raised a SIGABRT.
965 JH/32 For main options check_spool_space and check_inode_space, where the
966 platform supports 64b integers, support more than the previous 2^31 kB
967 (i.e. more than 2 TB). Accept E, P and T multipliers in addition to
968 the previous G, M, k.
970 JH/33 Bug 2338: Fix the cyrus-sasl authenticator to fill in the
971 $authenticated_fail_id variable on authentication failure. Previously
974 JH/34 Increase RSA keysize of autogen selfsign cert from 1024 to 2048. RHEL 8.0
975 OpenSSL didn't want to use such a weak key. Do for GnuTLS also, and for
976 more-modern GnuTLS move from GNUTLS_SEC_PARAM_LOW to
977 GNUTLS_SEC_PARAM_MEDIUM.
979 JH/35 OpenSSL: fail the handshake when SNI processing hits a problem, server
980 side. Previously we would continue as if no SNI had been received.
982 JH/36 Harden the handling of string-lists. When a list consisted of a sole
983 "<" character, which should be a list-separator specification, we walked
984 off past the nul-terimation.
986 JH/37 Bug 2341: Send "message delayed" warning MDNs (restricted to external
987 causes) even when the retry time is not yet met. Previously they were
988 not, meaning that when (say) an account was over-quota and temp-rejecting,
989 and multiple senders' messages were queued, only one sender would get
990 notified on each configured delay_warning cycle.
992 JH/38 Bug 2351: Log failures to extract envelope addresses from message headers.
994 JH/39 OpenSSL: clear the error stack after an SSL_accept(). With anon-auth
995 cipher-suites, an error can be left on the stack even for a succeeding
996 accept; this results in impossible error messages when a later operation
999 AM/01 Bug 2359: GnuTLS: repeat lowlevel read and write operations while they
1000 return error codes indicating retry. Under TLS1.3 this becomes required.
1002 JH/40 Fix the feature-cache refresh for EXPERIMENTAL_PIPE_CONNECT. Previously
1003 it only wrote the new authenticators, resulting in a lack of tracking of
1004 peer changes of ESMTP extensions until the next cache flush.
1006 JH/41 Fix the loop reading a message header line to check for integer overflow,
1007 and more-often against header_maxsize. Previously a crafted message could
1008 induce a crash of the recive process; now the message is cleanly rejected.
1010 JH/42 Bug 2366: Fix the behaviour of the dkim_verify_signers option. It had
1011 been totally disabled for all of 4.91. Discovery and fix by "Mad Alex".
1017 GF/01 DEFER rather than ERROR on redis cluster MOVED response.
1018 When redis_servers is set to a list of > 1 element, and the Redis servers
1019 in that list are in cluster configuration, convert the REDIS_REPLY_ERROR
1020 case of MOVED into a DEFER case instead, thus moving the query onto the
1021 next server in the list. For a cluster of N elements, all N servers must
1022 be defined in redis_servers.
1024 GF/02 Catch and remove uninitialized value warning in exiqsumm
1025 Check for existence of @ARGV before looking at $ARGV[0]
1027 JH/01 Replace the store_release() internal interface with store_newblock(),
1028 which internalises the check required to safely use the old one, plus
1029 the allocate and data copy operations duplicated in both (!) of the
1030 extant use locations.
1032 JH/02 Disallow '/' characters in queue names specified for the "queue=" ACL
1033 modifier. This matches the restriction on the commandline.
1035 JH/03 Fix pgsql lookup for multiple result-tuples with a single column.
1036 Previously only the last row was returned.
1038 JH/04 Bug 2217: Tighten up the parsing of DKIM signature headers. Previously
1039 we assumed that tags in the header were well-formed, and parsed the
1040 element content after inspecting only the first char of the tag.
1041 Assumptions at that stage could crash the receive process on malformed
1044 JH/05 Bug 2215: Fix crash associated with dnsdb lookup done from DKIM ACL.
1045 While running the DKIM ACL we operate on the Permanent memory pool so that
1046 variables created with "set" persist to the DATA ACL. Also (at any time)
1047 DNS lookups that fail create cache records using the Permanent pool. But
1048 expansions release any allocations made on the current pool - so a dnsdb
1049 lookup expansion done in the DKIM ACL releases the memory used for the
1050 DNS negative-cache, and bad things result. Solution is to switch to the
1051 Main pool for expansions.
1052 While we're in that code, add checks on the DNS cache during store_reset,
1053 active in the testsuite.
1054 Problem spotted, and debugging aided, by Wolfgang Breyha.
1056 JH/06 Fix issue with continued-connections when the DNS shifts unreliably.
1057 When none of the hosts presented to a transport match an already-open
1058 connection, close it and proceed with the list. Previously we would
1059 queue the message. Spotted by Lena with Yahoo, probably involving
1062 JH/07 Bug 2214: Fix SMTP responses resulting from non-accept result of MIME ACL.
1063 Previously a spurious "250 OK id=" response was appended to the proper
1066 JH/08 The "support for" informational output now, which built with Content
1067 Scanning support, has a line for the malware scanner interfaces compiled
1068 in. Interface can be individually included or not at build time.
1070 JH/09 The "aveserver", "kavdaemon" and "mksd" interfaces are now not included
1071 by the template makefile "src/EDITME". The "STREAM" support for an older
1072 ClamAV interface method is removed.
1074 JH/10 Bug 2223: Fix mysql lookup returns for the no-data case (when the number of
1075 rows affected is given instead).
1077 JH/11 The runtime Berkeley DB library version is now additionally output by
1078 "exim -d -bV". Previously only the compile-time version was shown.
1080 JH/12 Bug 2230: Fix cutthrough routing for nonfirst messages in an initiating
1081 SMTP connection. Previously, when one had more recipients than the
1082 first, an abortive onward connection was made. Move to full support for
1083 multiple onward connections in sequence, handling cutthrough connection
1084 for all multi-message initiating connections.
1086 JH/13 Bug 2229: Fix cutthrough routing for nonstandard port numbers defined by
1087 routers. Previously, a multi-recipient message would fail to match the
1088 onward-connection opened for the first recipient, and cause its closure.
1090 JH/14 Bug 2174: A timeout on connect for a callout was also erroneously seen as
1091 a timeout on read on a GnuTLS initiating connection, resulting in the
1092 initiating connection being dropped. This mattered most when the callout
1093 was marked defer_ok. Fix to keep the two timeout-detection methods
1096 JH/15 Relax results from ACL control request to enable cutthrough, in
1097 unsupported situations, from error to silently (except under debug)
1098 ignoring. This covers use with PRDR, frozen messages, queue-only and
1101 HS/01 Fix Buffer overflow in base64d() (CVE-2018-6789)
1103 JH/16 Fix bug in DKIM verify: a buffer overflow could corrupt the malloc
1104 metadata, resulting in a crash in free().
1106 PP/01 Fix broken Heimdal GSSAPI authenticator integration.
1107 Broken in f2ed27cf5, missing an equals sign for specified-initialisers.
1108 Broken also in d185889f4, with init system revamp.
1110 JH/17 Bug 2113: Fix conversation closedown with the Avast malware scanner.
1111 Previously we abruptly closed the connection after reading a malware-
1112 found indication; now we go on to read the "scan ok" response line,
1115 JH/18 Bug 2239: Enforce non-usability of control=utf8_downconvert in the mail
1116 ACL. Previously, a crash would result.
1118 JH/19 Speed up macro lookups during configuration file read, by skipping non-
1119 macro text after a replacement (previously it was only once per line) and
1120 by skipping builtin macros when searching for an uppercase lead character.
1122 JH/20 DANE support moved from Experimental to mainline. The Makefile control
1123 for the build is renamed.
1125 JH/21 Fix memory leak during multi-message connections using STARTTLS. A buffer
1126 was allocated for every new TLS startup, meaning one per message. Fix
1127 by only allocating once (OpenSSL) or freeing on TLS-close (GnuTLS).
1129 JH/22 Bug 2236: When a DKIM verification result is overridden by ACL, DMARC
1130 reported the original. Fix to report (as far as possible) the ACL
1131 result replacing the original.
1133 JH/23 Fix memory leak during multi-message connections using STARTTLS under
1134 OpenSSL. Certificate information is loaded for every new TLS startup,
1135 and the resources needed to be freed.
1137 JH/24 Bug 2242: Fix exim_dbmbuild to permit directoryless filenames.
1139 JH/25 Fix utf8_downconvert propagation through a redirect router. Previously it
1142 JH/26 Bug 2253: For logging delivery lines under PRDR, append the overall
1143 DATA response info to the (existing) per-recipient response info for
1144 the "C=" log element. It can have useful tracking info from the
1145 destination system. Patch from Simon Arlott.
1147 JH/27 Bug 2251: Fix ldap lookups that return a single attribute having zero-
1148 length value. Previously this would segfault.
1150 HS/02 Support Avast multiline protoocol, this allows passing flags to
1151 newer versions of the scanner.
1153 JH/28 Ensure that variables possibly set during message acceptance are marked
1154 dead before release of memory in the daemon loop. This stops complaints
1155 about them when the debug_store option is enabled. Discovered specifically
1156 for sender_rate_period, but applies to a whole set of variables.
1157 Do the same for the queue-runner and queue-list loops, for variables set
1158 from spool message files. Do the same for the SMTP per-message loop, for
1159 certain variables indirectly set in ACL operations.
1161 JH/29 Bug 2250: Fix a longstanding bug in heavily-pipelined SMTP input (such
1162 as a multi-recipient message from a mailinglist manager). The coding had
1163 an arbitrary cutoff number of characters while checking for more input;
1164 enforced by writing a NUL into the buffer. This corrupted long / fast
1165 input. The problem was exposed more widely when more pipelineing of SMTP
1166 responses was introduced, and one Exim system was feeding another.
1167 The symptom is log complaints of SMTP syntax error (NUL chars) on the
1168 receiving system, and refused recipients seen by the sending system
1169 (propating to people being dropped from mailing lists).
1170 Discovered and pinpointed by David Carter.
1172 JH/30 The (EXPERIMENTAL_DMARC) variable $dmarc_ar_header is withdrawn, being
1173 replaced by the ${authresults } expansion.
1175 JH/31 Bug 2257: Fix pipe transport to not use a socket-only syscall.
1177 HS/03 Set a handler for SIGTERM and call exit(3) if running as PID 1. This
1178 allows proper process termination in container environments.
1180 JH/32 Bug 2258: Fix spool_wireformat in combination with LMTP transport.
1181 Previously the "final dot" had a newline after it; ensure it is CR,LF.
1183 JH/33 SPF: remove support for the "spf" ACL condition outcome values "err_temp"
1184 and "err_perm", deprecated since 4.83 when the RFC-defined words
1185 "temperror" and "permerror" were introduced.
1187 JH/34 Re-introduce enforcement of no cutthrough delivery on transports having
1188 transport-filters or DKIM-signing. The restriction was lost in the
1189 consolidation of verify-callout and delivery SMTP handling.
1190 Extend the restriction to also cover ARC-signing.
1192 JH/35 Cutthrough: for a final-dot response timeout (and nonunderstood responses)
1193 in defer=pass mode supply a 450 to the initiator. Previously the message
1196 PP/02 DANE: add dane_require_tls_ciphers SMTP Transport option; if unset,
1197 tls_require_ciphers is used as before.
1199 HS/03 Malware Avast: Better match the Avast multiline protocol. Add
1200 "pass_unscanned". Only tmpfails from the scanner are written to
1201 the paniclog, as they may require admin intervention (permission
1202 denied, license issues). Other scanner errors (like decompression
1203 bombs) do not cause a paniclog entry.
1205 JH/36 Fix reinitialisation of DKIM logging variable between messages.
1206 Previously it was possible to log spurious information in receive log
1209 JH/37 Bug 2255: Revert the disable of the OpenSSL session caching. This
1210 triggered odd behaviour from Outlook Express clients.
1212 PP/03 Add util/renew-opendmarc-tlds.sh script for safe renewal of public
1215 JH/38 DKIM: accept Ed25519 pubkeys in SubjectPublicKeyInfo-wrapped form,
1216 since the IETF WG has not yet settled on that versus the original
1217 "bare" representation.
1219 JH/39 Fix syslog logging for syslog_timestamp=no and log_selector +millisec.
1220 Previously the millisecond value corrupted the output.
1221 Fix also for syslog_pid=no and log_selector +pid, for which the pid
1222 corrupted the output.
1228 JH/01 Rework error string handling in TLS interface so that the caller in
1229 more cases is responsible for logging. This permits library-sourced
1230 string to be attached to addresses during delivery, and collapses
1231 pairs of long lines into single ones.
1233 PP/01 Allow PKG_CONFIG_PATH to be set in Local/Makefile and use it correctly
1234 during configuration. Wildcards are allowed and expanded.
1236 JH/02 Rework error string handling in DKIM to pass more info back to callers.
1237 This permits better logging.
1239 JH/03 Rework the transport continued-connection mechanism: when TLS is active,
1240 do not close it down and have the child transport start it up again on
1241 the passed-on TCP connection. Instead, proxy the child (and any
1242 subsequent ones) for TLS via a unix-domain socket channel. Logging is
1243 affected: the continued delivery log lines do not have any DNSSEC, TLS
1244 Certificate or OCSP information. TLS cipher information is still logged.
1246 JH/04 Shorten the log line for daemon startup by collapsing adjacent sets of
1247 identical IP addresses on different listening ports. Will also affect
1250 PP/02 Bug 2070: uClibc defines __GLIBC__ without providing glibc headers;
1251 add noisy ifdef guards to special-case this sillyness.
1252 Patch from Bernd Kuhls.
1254 JH/05 Tighten up the checking in isip4 (et al): dotted-quad components larger
1255 than 255 are no longer allowed.
1257 JH/06 Default openssl_options to include +no_ticket, to reduce load on peers.
1258 Disable the session-cache too, which might reduce our load. Since we
1259 currrectly use a new context for every connection, both as server and
1260 client, there is no benefit for these.
1261 GnuTLS appears to not support tickets server-side by default (we don't
1262 call gnutls_session_ticket_enable_server()) but client side is enabled
1263 by default on recent versions (3.1.3 +) unless the PFS priority string
1266 PP/03 Add $SOURCE_DATE_EPOCH support for reproducible builds, per spec at
1267 <https://reproducible-builds.org/specs/source-date-epoch/>.
1269 JH/07 Fix smtp transport use of limited max_rcpt under mua_wrapper. Previously
1270 the check for any unsuccessful recipients did not notice the limit, and
1271 erroneously found still-pending ones.
1273 JH/08 Pipeline CHUNKING command and data together, on kernels that support
1274 MSG_MORE. Only in-clear (not on TLS connections).
1276 JH/09 Avoid using a temporary file during transport using dkim. Unless a
1277 transport-filter is involved we can buffer the headers in memory for
1278 creating the signature, and read the spool data file once for the
1279 signature and again for transmission.
1281 JH/10 Enable use of sendfile in Linux builds as default. It was disabled in
1282 4.77 as the kernel support then wasn't solid, having issues in 64bit
1283 mode. Now, it's been long enough. Add support for FreeBSD also.
1285 JH/11 Bug 2104: Fix continued use of a transport connection with TLS. In the
1286 case where the routing stage had gathered several addresses to send to
1287 a host before calling the transport for the first, we previously failed
1288 to close down TLS in the old transport process before passing the TCP
1289 connection to the new process. The new one sent a STARTTLS command
1290 which naturally failed, giving a failed delivery and bloating the retry
1291 database. Investigation and fix prototype from Wolfgang Breyha.
1293 JH/12 Fix check on SMTP command input synchronisation. Previously there were
1294 false-negatives in the check that the sender had not preempted a response
1295 or prompt from Exim (running as a server), due to that code's lack of
1296 awareness of the SMTP input buffering.
1298 PP/04 Add commandline_checks_require_admin option.
1299 Exim drops privileges sanely, various checks such as -be aren't a
1300 security problem, as long as you trust local users with access to their
1301 own account. When invoked by services which pass untrusted data to
1302 Exim, this might be an issue. Set this option in main configuration
1303 AND make fixes to the calling application, such as using `--` to stop
1306 JH/13 Do pipelining under TLS. Previously, although safe, no advantage was
1307 taken. Now take care to pack both (client) MAIL,RCPT,DATA, and (server)
1308 responses to those, into a single TLS record each way (this usually means
1309 a single packet). As a side issue, smtp_enforce_sync now works on TLS
1312 PP/05 OpenSSL/1.1: use DH_bits() for more accurate DH param sizes. This
1313 affects you only if you're dancing at the edge of the param size limits.
1314 If you are, and this message makes sense to you, then: raise the
1315 configured limit or use OpenSSL 1.1. Nothing we can do for older
1318 JH/14 For the "sock" variant of the malware scanner interface, accept an empty
1319 cmdline element to get the documented default one. Previously it was
1322 JH/15 Fix a crash in the smtp transport caused when two hosts in succession
1323 are unsuable for non-message-specific reasons - eg. connection timeout,
1324 banner-time rejection.
1326 JH/16 Fix logging of delivery remote port, when specified by router, under
1329 PP/06 Repair manualroute's ability to take options in any order, even if one
1330 is the name of a transport.
1333 HS/01 Cleanup, prevent repeated use of -p/-oMr (CVE-2017-1000369)
1335 JH/17 Change the list-building routines interface to use the expanding-string
1336 triplet model, for better allocation and copying behaviour.
1338 JH/18 Prebuild the data-structure for "builtin" macros, for faster startup.
1339 Previously it was constructed the first time a possibly-matching string
1340 was met in the configuration file input during startup; now it is done
1343 JH/19 Bug 2141: Use the full-complex API for Berkeley DB rather than the legacy-
1344 compatible one, to avoid the (poorly documented) possibility of a config
1345 file in the working directory redirecting the DB files, possibly correpting
1346 some existing file. CVE-2017-10140 assigned for BDB.
1348 JH/20 Bug 2147: Do not defer for a verify-with-callout-and-random which is not
1349 cache-hot. Previously, although the result was properly cached, the
1350 initial verify call returned a defer.
1352 JH/21 Bug 2151: Avoid using SIZE on the MAIL for a callout verify, on any but
1353 the main verify for receipient in uncached-mode.
1355 JH/22 Retire historical build files to an "unsupported" subdir. These are
1356 defined as "ones for which we have no current evidence of testing".
1358 JH/23 DKIM: enforce the DNS pubkey record "h" permitted-hashes optional field,
1359 if present. Previously it was ignored.
1361 JH/24 Start using specified-initialisers in C structure init coding. This is
1362 a C99 feature (it's 2017, so now considered safe).
1364 JH/25 Use one-bit bitfields for flags in the "addr" data structure. Previously
1365 if was a fixed-sized field and bitmask ops via macros; it is now more
1368 PP/07 GitHub PR 56: Apply MariaDB build fix.
1369 Patch provided by Jaroslav Škarvada.
1371 PP/08 Bug 2161: Fix regression in sieve quoted-printable handling introduced
1372 during Coverity cleanups [4.87 JH/47]
1373 Diagnosis and fix provided by Michael Fischer v. Mollard.
1375 JH/26 Fix DKIM bug: when the pseudoheader generated for signing was exactly
1376 the right size to place the terminating semicolon on its own folded
1377 line, the header hash was calculated to an incorrect value thanks to
1378 the (relaxed) space the fold became.
1380 HS/02 Fix Bug 2130: large writes from the transport subprocess were chunked
1381 and confused the parent.
1383 JH/27 Fix SOCKS bug: an unitialized pointer was deref'd by the transport process
1384 which could crash as a result. This could lead to undeliverable messages.
1386 JH/28 Logging: "next input sent too soon" now shows where input was truncated
1389 JH/29 Fix queue_run_in_order to ignore the PID portion of the message ID. This
1390 matters on fast-turnover and PID-randomising systems, which were getting
1391 out-of-order delivery.
1393 JH/30 Fix a logging bug on aarch64: an unsafe routine was previously used for
1394 a possibly-overlapping copy. The symptom was that "Remote host closed
1395 connection in response to HELO" was logged instead of the actual 4xx
1398 JH/31 Fix CHUNKING code to properly flush the unwanted chunk after an error.
1399 Previously only that bufferd was discarded, resulting in SYMTP command
1402 JH/32 DKIM: when a message has multiple signatures matching an identity given
1403 in dkim_verify_signers, run the dkim acl once for each. Previously only
1404 one run was done. Bug 2189.
1406 JH/33 Downgrade an unfound-list name (usually a typo in the config file) from
1407 "panic the current process" to "deliberately defer". The panic log is
1408 still written with the problem list name; the mail and reject logs now
1409 get a temp-reject line for the message that was being handled, saying
1410 something like "domains check lookup or other defer". The SMTP 451
1411 message is still "Temporary local problem".
1413 JH/34 Bug 2199: Fix a use-after-free while reading smtp input for header lines.
1414 A crafted sequence of BDAT commands could result in in-use memory beeing
1415 freed. CVE-2017-16943.
1417 HS/03 Bug 2201: Fix checking for leading-dot on a line during headers reading
1418 from SMTP input. Previously it was always done; now only done for DATA
1419 and not BDAT commands. CVE-2017-16944.
1421 JH/35 Bug 2201: Flush received data in BDAT mode after detecting an error fatal
1422 to the message (such as an overlong header line). Previously this was
1423 not done and we did not exit BDAT mode. Followon from the previous item
1424 though a different problem.
1430 JH/01 Bug 1922: Support IDNA2008. This has slightly different conversion rules
1431 than -2003 did; needs libidn2 in addition to libidn.
1433 JH/02 The path option on a pipe transport is now expanded before use.
1435 PP/01 GitHub PR 50: Do not call ldap_start_tls_s on ldapi:// connections.
1436 Patch provided by "Björn", documentation fix added too.
1438 JH/03 Bug 2003: fix Proxy Protocol v2 handling: the address size field was
1439 missing a wire-to-host endian conversion.
1441 JH/04 Bug 2004: fix CHUNKING in non-PIPELINEING mode. Chunk data following
1442 close after a BDAT command line could be taken as a following command,
1443 giving a synch failure. Fix by only checking for synch immediately
1444 before acknowledging the chunk.
1446 PP/02 GitHub PR 52: many spelling fixes, which include fixing parsing of
1447 no_require_dnssec option and creation of _HAVE_TRANSPORT_APPEND_MAILDIR
1448 macro. Patches provided by Josh Soref.
1450 JH/05 Have the EHLO response advertise VRFY, if there is a vrfy ACL defined.
1451 Previously we did not; the RFC seems ambiguous and VRFY is not listed
1452 by IANA as a service extension. However, John Klensin suggests that we
1455 JH/06 Bug 2017: Fix DKIM verification in -bh test mode. The data feed into
1456 the dkim code may be unix-mode line endings rather than smtp wire-format
1457 CRLF, so prepend a CR to any bare LF.
1459 JH/07 Rationalise the coding for callout smtp conversations and transport ones.
1460 As a side-benfit, callouts can now use PIPELINING hence fewer round-trips.
1462 JH/08 Bug 2016: Fix DKIM verification vs. CHUNKING. Any BDAT commands after
1463 the first were themselves being wrongly included in the feed into dkim
1464 processing; with most chunk sizes in use this resulted in an incorrect
1465 body hash calculated value.
1467 JH/09 Bug 2014: permit inclusion of a DKIM-Signature header in a received
1468 DKIM signature block, for verification. Although advised against by
1469 standards it is specifically not ruled illegal.
1471 JH/10 Bug 2025: Fix reception of (quoted) local-parts with embedded spaces.
1473 JH/11 Bug 2029: Fix crash in DKIM verification when a message signature block is
1474 missing a body hash (the bh= tag).
1476 JH/12 Bug 2018: Re-order Proxy Protocol startup versus TLS-on-connect startup.
1477 It seems that HAProxy sends the Proxy Protocol information in clear and
1478 only then does a TLS startup, so do the same.
1480 JH/13 Bug 2027: Avoid attempting to use TCP Fast Open for non-transport client
1481 TCP connections (such as for Spamd) unless the daemon successfully set
1482 Fast Open mode on its listening sockets. This fixes breakage seen on
1483 too-old kernels or those not configured for Fast Open, at the cost of
1484 requiring both directions being enabled for TFO, and TFO never being used
1485 by non-daemon-related Exim processes.
1487 JH/14 Bug 2000: Reject messages recieved with CHUNKING but with malformed line
1488 endings, at least on the first header line. Try to canonify any that get
1489 past that check, despite the cost.
1491 JH/15 Angle-bracket nesting (an error inserted by broken sendmails) levels are
1492 now limited to an arbitrary five deep, while parsing addresses with the
1493 strip_excess_angle_brackets option enabled.
1495 PP/03 Bug 2018: For Proxy Protocol and TLS-on-connect, do not over-read and
1496 instead leave the unprompted TLS handshake in socket buffer for the
1497 TLS library to consume.
1499 PP/04 Bug 2018: Also handle Proxy Protocol v2 safely.
1501 PP/05 FreeBSD compat: handle that Ports no longer create /usr/bin/perl
1503 JH/16 Drop variables when they go out of scope. Memory management drops a whole
1504 region in one operation, for speed, and this leaves assigned pointers
1505 dangling. Add checks run only under the testsuite which checks all
1506 variables at a store-reset and panics on a dangling pointer; add code
1507 explicitly nulling out all the variables discovered. Fixes one known
1508 bug: a transport crash, where a dangling pointer for $sending_ip_address
1509 originally assigned in a verify callout, is re-used.
1511 PP/06 Drop '.' from @INC in various Perl scripts.
1513 PP/07 Switch FreeBSD iconv to always use the base-system libc functions.
1515 PP/08 Reduce a number of compilation warnings under clang; building with
1516 CC=clang CFLAGS+=-Wno-dangling-else -Wno-logical-op-parentheses
1517 should be warning-free.
1519 JH/17 Fix inbound CHUNKING when DKIM disabled at runtime.
1521 HS/01 Fix portability problems introduced by PP/08 for platforms where
1522 realloc(NULL) is not equivalent to malloc() [SunOS et al].
1524 HS/02 Bug 1974: Fix missing line terminator on the last received BDAT
1525 chunk. This allows us to accept broken chunked messages. We need a more
1526 general solution here.
1528 PP/09 Wrote util/chunking_fixqueue_finalnewlines.pl to help recover
1529 already-broken messages in the queue.
1531 JH/18 Bug 2061: Fix ${extract } corrupting an enclosing ${reduce } $value.
1533 JH/19 Fix reference counting bug in routing-generated-address tracking.
1539 JH/01 Use SIZE on MAIL FROM in a cutthrough connection, if the destination
1540 supports it and a size is available (ie. the sending peer gave us one).
1542 JH/02 The obsolete acl condition "demime" is removed (finally, after ten
1543 years of being deprecated). The replacements are the ACLs
1544 acl_smtp_mime and acl_not_smtp_mime.
1546 JH/03 Upgrade security requirements imposed for hosts_try_dane: previously
1547 a downgraded non-dane trust-anchor for the TLS connection (CA-style)
1548 or even an in-clear connection were permitted. Now, if the host lookup
1549 was dnssec and dane was requested then the host is only used if the
1550 TLSA lookup succeeds and is dnssec. Further hosts (eg. lower priority
1551 MXs) will be tried (for hosts_try_dane though not for hosts_require_dane)
1552 if one fails this test.
1553 This means that a poorly-configured remote DNS will make it incommunicado;
1554 but it protects against a DNS-interception attack on it.
1556 JH/04 Bug 1810: make continued-use of an open smtp transport connection
1557 non-noisy when a race steals the message being considered.
1559 JH/05 If main configuration option tls_certificate is unset, generate a
1560 self-signed certificate for inbound TLS connections.
1562 JH/06 Bug 165: hide more cases of password exposure - this time in expansions
1563 in rewrites and routers.
1565 JH/07 Retire gnutls_require_mac et.al. These were nonfunctional since 4.80
1566 and logged a warning sing 4.83; now they are a configuration file error.
1568 JH/08 Bug 1836: Fix crash in VRFY handling when handed an unqualified name
1569 (lacking @domain). Apply the same qualification processing as RCPT.
1571 JH/09 Bug 1804: Avoid writing msglog files when in -bh or -bhc mode.
1573 JH/10 Support ${sha256:} applied to a string (as well as the previous
1576 JH/11 Cutthrough: avoid using the callout hints db on a verify callout when
1577 a cutthrough deliver is pending, as we always want to make a connection.
1578 This also avoids re-routing the message when later placing the cutthrough
1579 connection after a verify cache hit.
1580 Do not update it with the verify result either.
1582 JH/12 Cutthrough: disable when verify option success_on_redirect is used, and
1583 when routing results in more than one destination address.
1585 JH/13 Cutthrough: expand transport dkim_domain option when testing for dkim
1586 signing (which inhibits the cutthrough capability). Previously only
1587 the presence of an option was tested; now an expansion evaluating as
1588 empty is permissible (obviously it should depend only on data available
1589 when the cutthrough connection is made).
1591 JH/14 Fix logging of errors under PIPELINING. Previously the log line giving
1592 the relevant preceding SMTP command did not note the pipelining mode.
1594 JH/15 Fix counting of empty lines in $body_linecount and $message_linecount.
1595 Previously they were not counted.
1597 JH/16 DANE: treat a TLSA lookup response having all non-TLSA RRs, the same
1598 as one having no matching records. Previously we deferred the message
1599 that needed the lookup.
1601 JH/17 Fakereject: previously logged as a normal message arrival "<="; now
1602 distinguished as "(=".
1604 JH/18 Bug 1867: make the fail_defer_domains option on a dnslookup router work
1605 for missing MX records. Previously it only worked for missing A records.
1607 JH/19 Bug 1850: support Radius libraries that return REJECT_RC.
1609 JH/20 Bug 1872: Ensure that acl_smtp_notquit is run when the connection drops
1610 after the data-go-ahead and data-ack. Patch from Jason Betts.
1612 JH/21 Bug 1846: Send DMARC forensic reports for reject and quarantine results,
1613 even for a "none" policy. Patch from Tony Meyer.
1615 JH/22 Fix continued use of a connection for further deliveries. If a port was
1616 specified by a router, it must also match for the delivery to be
1619 JH/23 Bug 1874: fix continued use of a connection for further deliveries.
1620 When one of the recipients of a message was unsuitable for the connection
1621 (has no matching addresses), we lost track of needing to mark it
1622 deferred. As a result mail would be lost.
1624 JH/24 Bug 1832: Log EHLO response on getting conn-close response for HELO.
1626 JH/25 Decoding ACL controls is now done using a binary search; the source code
1627 takes up less space and should be simpler to maintain. Merge the ACL
1628 condition decode tables also, with similar effect.
1630 JH/26 Fix problem with one_time used on a redirect router which returned the
1631 parent address unchanged. A retry would see the parent address marked as
1632 delivered, so not attempt the (identical) child. As a result mail would
1635 JH/27 Fix a possible security hole, wherein a process operating with the Exim
1636 UID can gain a root shell. Credit to http://www.halfdog.net/ for
1637 discovery and writeup. Ubuntu bug 1580454; no bug raised against Exim
1640 JH/28 Enable {spool,log} filesystem space and inode checks as default.
1641 Main config options check_{log,spool}_{inodes,space} are now
1642 100 inodes, 10MB unless set otherwise in the configuration.
1644 JH/29 Fix the connection_reject log selector to apply to the connect ACL.
1645 Previously it only applied to the main-section connection policy
1648 JH/30 Bug 1897: fix callouts connection fallback from TLS to cleartext.
1650 PP/01 Changed default Diffie-Hellman parameters to be Exim-specific, created
1651 by me. Added RFC7919 DH primes as an alternative.
1653 PP/02 Unbreak build via pkg-config with new hash support when crypto headers
1654 are not in the system include path.
1656 JH/31 Fix longstanding bug with aborted TLS server connection handling. Under
1657 GnuTLS, when a session startup failed (eg because the client disconnected)
1658 Exim did stdio operations after fclose. This was exposed by a recent
1659 change which nulled out the file handle after the fclose.
1661 JH/32 Bug 1909: Fix OCSP proof verification for cases where the proof is
1662 signed directly by the cert-signing cert, rather than an intermediate
1663 OCSP-signing cert. This is the model used by LetsEncrypt.
1665 JH/33 Bug 1914: Ensure socket is nonblocking before draining after SMTP QUIT.
1667 HS/01 Fix leak in verify callout under GnuTLS, about 3MB per recipient on
1668 an incoming connection.
1670 HS/02 Bug 1802: Do not half-close the connection after sending a request
1673 HS/03 Use "auto" as the default EC curve parameter. For OpenSSL < 1.0.2
1674 fallback to "prime256v1".
1676 JH/34 SECURITY: Use proper copy of DATA command in error message.
1677 Could leak key material. Remotely exploitable. CVE-2016-9963.
1683 JH/01 Bug 1664: Disable OCSP for GnuTLS library versions at/before 3.3.16
1684 and 3.4.4 - once the server is enabled to respond to an OCSP request
1685 it does even when not requested, resulting in a stapling non-aware
1686 client dropping the TLS connection.
1688 TF/01 Code cleanup: Overhaul the debug_selector and log_selector machinery to
1689 support variable-length bit vectors. No functional change.
1691 TF/02 Improve the consistency of logging incoming and outgoing interfaces.
1692 The I= interface field on outgoing lines is now after the H= remote
1693 host field, same as incoming lines. There is a separate
1694 outgoing_interface log selector which allows you to disable the
1697 JH/02 Bug 728: Close logfiles after a daemon-process "exceptional" log write.
1698 If not running log_selector +smtp_connection the mainlog would be held
1699 open indefinitely after a "too many connections" event, including to a
1700 deleted file after a log rotate. Leave the per net connection logging
1701 leaving it open for efficiency as that will be quickly detected by the
1702 check on the next write.
1704 HS/01 Bug 1671: Fix post transport crash.
1705 Processing the wait-<transport> messages could crash the delivery
1706 process if the message IDs didn't exist for some reason. When
1707 using 'split_spool_directory=yes' the construction of the spool
1708 file name failed already, exposing the same netto behaviour.
1710 JH/03 Bug 425: Capture substrings in $regex1, $regex2 etc from regex &
1711 mime_regex ACL conditions.
1713 JH/04 Bug 1686: When compiled with EXPERIMENTAL_DSN_INFO: Add extra information
1714 to DSN fail messages (bounces): remote IP, remote greeting, remote response
1715 to HELO, local diagnostic string.
1717 JH/05 Downgrade message for a TLS-certificate-based authentication fail from
1718 log line to debug. Even when configured with a tls authenticator many
1719 client connections are expected to not authenticate in this way, so
1720 an authenticate fail is not an error.
1722 HS/02 Add the Exim version string to the process info. This way exiwhat
1723 gives some more detail about the running daemon.
1725 JH/06 Bug 1395: time-limit caching of DNS lookups, to the TTL value. This may
1726 matter for fast-change records such as DNSBLs.
1728 JH/07 Bug 1678: Always record an interface option value, if set, as part of a
1729 retry record, even if constant. There may be multiple transports with
1730 different interface settings and the retry behaviour needs to be kept
1733 JH/08 Bug 1586: exiqgrep now refuses to run if there are unexpected arguments.
1735 JH/09 Bug 1700: ignore space & tab embedded in base64 during decode.
1737 JH/10 Bug 840: fix log_defer_output option of pipe transport
1739 JH/11 Bug 830: use same host for all RCPTS of a message, even under
1740 hosts_randomize. This matters a lot when combined with mua_wrapper.
1742 JH/12 Bug 1706: percent and underbar characters are no longer escaped by the
1743 ${quote_pgsql:<string>} operator.
1745 JH/13 Bug 1708: avoid misaligned access in cached lookup.
1747 JH/14 Change header file name for freeradius-client. Relevant if compiling
1748 with Radius support; from the Gentoo tree and checked under Fedora.
1750 JH/15 Bug 1712: Introduce $prdr_requested flag variable
1752 JH/16 Bug 1714: Permit an empty string as expansion result for transport
1753 option transport_filter, meaning no filtering.
1755 JH/17 Bug 1713: Fix non-PDKIM_DEBUG build. Patch from Jasen Betts.
1757 JH/18 Bug 1709: When built with TLS support, the tls_advertise_hosts option now
1758 defaults to "*" (all hosts). The variable is now available when not built
1759 with TLS, default unset, mainly to enable keeping the testsuite sane.
1760 If a server certificate is not supplied (via tls_certificate) an error is
1761 logged, and clients will find TLS connections fail on startup. Presumably
1762 they will retry in-clear.
1763 Packagers of Exim are strongly encouraged to create a server certificate
1764 at installation time.
1766 HS/03 Add -bP config_file as a synonym for -bP configure_file, for consistency
1767 with the $config_file variable.
1769 JH/19 Two additional event types: msg:rcpt:defer and msg:rcpt:host:defer. Both
1770 in transport context, after the attempt, and per-recipient. The latter type
1771 is per host attempted. The event data is the error message, and the errno
1772 information encodes the lookup type (A vs. MX) used for the (first) host,
1773 and the trailing two digits of the smtp 4xx response.
1775 GF/01 Bug 1715: Fix for race condition in exicyclog, where exim could attempt
1776 to write to mainlog (or rejectlog, paniclog) in the window between file
1777 creation and permissions/ownership being changed. Particularly affects
1778 installations where exicyclog is run as root, rather than exim user;
1779 result is that the running daemon panics and dies.
1781 JH/20 Bug 1701: For MySQL lookups, support MySQL config file option group names.
1783 JH/21 Bug 1720: Add support for priority groups and weighted-random proxy
1784 selection for the EXPERIMENTAL_SOCKS feature, via new per-proxy options
1785 "pri" and "weight". Note that the previous implicit priority given by the
1786 list order is no longer honoured.
1788 JH/22 Bugs 963, 1721: Fix some corner cases in message body canonicalization
1789 for DKIM processing.
1791 JH/23 Move SOCKS5 support from Experimental to mainline, enabled for a build
1792 by defining SUPPORT_SOCKS.
1794 JH/26 Move PROXY support from Experimental to mainline, enabled for a build
1795 by defining SUPPORT_PROXY. Note that the proxy_required_hosts option
1796 is renamed to hosts_proxy, and the proxy_{host,target}_{address,port}.
1797 variables are renamed to proxy_{local,external}_{address,port}.
1799 JH/27 Move Internationalisation support from Experimental to mainline, enabled
1800 for a build by defining SUPPORT_I18N
1802 JH/28 Bug 1745: Fix redis lookups to handle (quoted) spaces embedded in parts
1803 of the query string, and make ${quote_redis:} do that quoting.
1805 JH/29 Move Events support from Experimental to mainline, enabled by default
1806 and removable for a build by defining DISABLE_EVENT.
1808 JH/30 Updated DANE implementation code to current from Viktor Dukhovni.
1810 JH/31 Fix bug with hosts_connection_nolog and named-lists which were wrongly
1811 cached by the daemon.
1813 JH/32 Move Redis support from Experimental to mainline, enabled for a build
1814 by defining LOOKUP_REDIS. The libhiredis library is required.
1816 JH/33 Bug 1748: Permit ACL dnslists= condition in non-smtp ACLs if explicit
1817 keys are given for lookup.
1819 JH/34 Bug 1192: replace the embedded copy of PolarSSL RSA routines in the DKIM
1820 support, by using OpenSSL or GnuTLS library ones. This means DKIM is
1821 only supported when built with TLS support. The PolarSSL SHA routines
1822 are still used when the TLS library is too old for convenient support.
1824 JH/35 Require SINGLE_DH_USE by default in OpenSSL (main config option
1825 openssl_options), for security. OpenSSL forces this from version 1.1.0
1826 server-side so match that on older versions.
1828 JH/36 Bug 1778: longstanding bug in memory use by the ${run } expansion: A fresh
1829 allocation for $value could be released as the expansion processing
1830 concluded, but leaving the global pointer active for it.
1832 JH/37 Bug 1769: Permit a VRFY ACL to override the default 252 response,
1833 and to use the domains and local_parts ACL conditions.
1835 JH/38 Fix cutthrough bug with body lines having a single dot. The dot was
1836 incorrectly not doubled on cutthrough transmission, hence seen as a
1837 body-termination at the receiving system - resulting in truncated mails.
1838 Commonly the sender saw a TCP-level error, and retransmitted the message
1839 via the normal store-and-forward channel. This could result in duplicates
1840 received - but deduplicating mailstores were liable to retain only the
1841 initial truncated version.
1843 JH/39 Bug 1781: Fix use of DKIM private-keys having trailing '=' in the base-64.
1845 JH/40 Fix crash in queryprogram router when compiled with EXPERIMENTAL_SRS.
1847 JH/41 Bug 1792: Fix selection of headers to sign for DKIM: bottom-up. While
1848 we're in there, support oversigning also; bug 1309.
1850 JH/42 Bug 1796: Fix error logged on a malware scanner connection failure.
1852 HS/04 Add support for keep_environment and add_environment options.
1854 JH/43 Tidy coding issues detected by gcc --fsanitize=undefined. Some remain;
1855 either intentional arithmetic overflow during PRNG, or testing config-
1858 JH/44 Bug 1800: The combination of a -bhc commandline option and cutthrough
1859 delivery resulted in actual delivery. Cancel cutthrough before DATA
1862 JH/45 Fix cutthrough, when connection not opened by verify and target hard-
1863 rejects a recipient: pass the reject to the originator.
1865 JH/46 Multiple issues raised by Coverity. Some were obvious or plausible bugs.
1866 Many were false-positives and ignorable, but it's worth fixing the
1869 JH/47 Fix build on HP-UX and older Solaris, which need (un)setenv now also
1870 for the new environment-manipulation done at startup. Move the routines
1871 from being local to tls.c to being global via the os.c file.
1873 JH/48 Bug 1807: Fix ${extract } for the numeric/3-string case. While preparsing
1874 an extract embedded as result-arg for a map, the first arg for extract
1875 is unavailable so we cannot tell if this is a numbered or keyed
1876 extraction. Accept either.
1882 JH/01 Bug 1545: The smtp transport option "retry_include_ip_address" is now
1885 JH/02 The smtp transport option "multi_domain" is now expanded.
1887 JH/03 The smtp transport now requests PRDR by default, if the server offers
1890 JH/04 Certificate name checking on server certificates, when exim is a client,
1891 is now done by default. The transport option tls_verify_cert_hostnames
1892 can be used to disable this per-host. The build option
1893 EXPERIMENTAL_CERTNAMES is withdrawn.
1895 JH/05 The value of the tls_verify_certificates smtp transport and main options
1896 default to the word "system" to access the system default CA bundle.
1897 For GnuTLS, only version 3.0.20 or later.
1899 JH/06 Verification of the server certificate for a TLS connection is now tried
1900 (but not required) by default. The verification status is now logged by
1901 default, for both outbound TLS and client-certificate supplying inbound
1904 JH/07 Changed the default rfc1413 lookup settings to disable calls. Few
1907 JH/08 The EXPERIMENTAL_DSN compile option is no longer needed; all Delivery
1908 Status Notification (bounce) messages are now MIME format per RFC 3464.
1909 Support for RFC 3461 DSN options NOTIFY,ENVID,RET,ORCPT can be advertised
1910 under the control of the dsn_advertise_hosts option, and routers may
1911 have a dsn_lasthop option.
1913 JH/09 A timeout of 2 minutes is now applied to all malware scanner types by
1914 default, modifiable by a malware= option. The list separator for
1915 the options can now be changed in the usual way. Bug 68.
1917 JH/10 The smtp_receive_timeout main option is now expanded before use.
1919 JH/11 The incoming_interface log option now also enables logging of the
1920 local interface on delivery outgoing connections.
1922 JH/12 The cutthrough-routing facility now supports multi-recipient mails,
1923 if the interface and destination host and port all match.
1925 JH/13 Bug 344: The verify = reverse_host_lookup ACL condition now accepts a
1928 JH/14 Bug 1573: The spam= ACL condition now additionally supports Rspamd.
1929 Patch from Andrew Lewis.
1931 JH/15 Bug 670: The spamd_address main option (for the spam= ACL condition)
1932 now supports optional time-restrictions, weighting, and priority
1933 modifiers per server. Patch originally by <rommer@active.by>.
1935 JH/16 The spamd_address main option now supports a mixed list of local
1936 and remote servers. Remote servers can be IPv6 addresses, and
1937 specify a port-range.
1939 JH/17 Bug 68: The spamd_address main option now supports an optional
1940 timeout value per server.
1942 JH/18 Bug 1581: Router and transport options headers_add/remove can
1943 now have the list separator specified.
1945 JH/19 Bug 392: spamd_address, and clamd av_scanner, now support retry
1948 JH/20 Bug 1571: Ensure that $tls_in_peerdn is set, when verification fails
1951 JH/21 Support for the A6 type of dns record is withdrawn.
1953 JH/22 Bug 608: The result of a QUIT or not-QUIT toplevel ACL now matters
1954 rather than the verbs used.
1956 JH/23 Bug 1572: Increase limit on SMTP confirmation message copy size
1957 from 255 to 1024 chars.
1959 JH/24 Verification callouts now attempt to use TLS by default.
1961 HS/01 DNSSEC options (dnssec_require_domains, dnssec_request_domains)
1962 are generic router options now. The defaults didn't change.
1964 JH/25 Bug 466: Add RFC2322 support for MIME attachment filenames.
1965 Original patch from Alexander Shikoff, worked over by JH.
1967 HS/02 Bug 1575: exigrep falls back to autodetection of compressed
1968 files if ZCAT_COMMAND is not executable.
1970 JH/26 Bug 1539: Add timeout/retry options on dnsdb lookups.
1972 JH/27 Bug 286: Support SOA lookup in dnsdb lookups.
1974 JH/28 Bug 1588: Do not use the A lookup following an AAAA for setting the FQDN.
1975 Normally benign, it bites when the pair was led to by a CNAME;
1976 modern usage is to not canonicalize the domain to a CNAME target
1977 (and we were inconsistent anyway for A-only vs AAAA+A).
1979 JH/29 Bug 1632: Removed the word "rejected" from line logged for ACL discards.
1981 JH/30 Check the forward DNS lookup for DNSSEC, in addition to the reverse,
1982 when evaluating $sender_host_dnssec.
1984 JH/31 Check the HELO verification lookup for DNSSEC, adding new
1985 $sender_helo_dnssec variable.
1987 JH/32 Bug 1397: Enable ECDHE on OpenSSL, just the NIST P-256 curve.
1989 JH/33 Bug 1346: Note MAIL cmd seen in -bS batch, to avoid smtp_no_mail log.
1991 JH/34 Bug 1648: Fix a memory leak seen with "mailq" and large queues.
1993 JH/35 Bug 1642: Fix support of $spam_ variables at delivery time. Was
1994 documented as working, but never had. Support all but $spam_report.
1996 JH/36 Bug 1659: Guard checking of input smtp commands again pseudo-command
1997 added for tls authenticator.
1999 HS/03 Add perl_taintmode main config option
2005 TL/01 When running the test suite, the README says that variables such as
2006 no_msglog_check are global and can be placed anywhere in a specific
2007 test's script, however it was observed that placement needed to be near
2008 the beginning for it to behave that way. Changed the runtest perl
2009 script to read through the entire script once to detect and set these
2010 variables, reset to the beginning of the script, and then run through
2011 the script parsing/test process like normal.
2013 TL/02 The BSD's have an arc4random API. One of the functions to induce
2014 adding randomness was arc4random_stir(), but it has been removed in
2015 OpenBSD 5.5. Detect this OpenBSD version and skip calling this
2016 function when detected.
2018 JH/01 Expand the EXPERIMENTAL_TPDA feature. Several different events now
2019 cause callback expansion.
2021 TL/03 Bugzilla 1518: Clarify "condition" processing in routers; that
2022 syntax errors in an expansion can be treated as a string instead of
2023 logging or causing an error, due to the internal use of bool_lax
2024 instead of bool when processing it.
2026 JH/02 Add EXPERIMENTAL_DANE, allowing for using the DNS as trust-anchor for
2027 server certificates when making smtp deliveries.
2029 JH/03 Support secondary-separator specifier for MX, SRV, TLSA lookups.
2031 JH/04 Add ${sort {list}{condition}{extractor}} expansion item.
2033 TL/04 Bugzilla 1216: Add -M (related messages) option to exigrep.
2035 TL/05 GitHub Issue 18: Adjust logic testing for true/false in redis lookups.
2036 Merged patch from Sebastian Wiedenroth.
2038 JH/05 Fix results-pipe from transport process. Several recipients, combined
2039 with certificate use, exposed issues where response data items split
2040 over buffer boundaries were not parsed properly. This eventually
2041 resulted in duplicates being sent. This issue only became common enough
2042 to notice due to the introduction of connection certificate information,
2043 the item size being so much larger. Found and fixed by Wolfgang Breyha.
2045 JH/06 Bug 1533: Fix truncation of items in headers_remove lists. A fixed
2046 size buffer was used, resulting in syntax errors when an expansion
2049 JH/07 Add support for directories of certificates when compiled with a GnuTLS
2050 version 3.3.6 or later.
2052 JH/08 Rename the TPDA experimental facility to Event Actions. The #ifdef
2053 is EXPERIMENTAL_EVENT, the main-configuration and transport options
2054 both become "event_action", the variables become $event_name, $event_data
2055 and $event_defer_errno. There is a new variable $verify_mode, usable in
2056 routers, transports and related events. The tls:cert event is now also
2057 raised for inbound connections, if the main configuration event_action
2060 TL/06 In test suite, disable OCSP for old versions of openssl which contained
2061 early OCSP support, but no stapling (appears to be less than 1.0.0).
2063 JH/09 When compiled with OpenSSL and EXPERIMENTAL_CERTNAMES, the checks on
2064 server certificate names available under the smtp transport option
2065 "tls_verify_cert_hostname" now do not permit multi-component wildcard
2068 JH/10 Time-related extraction expansions from certificates now use the main
2069 option "timezone" setting for output formatting, and are consistent
2070 between OpenSSL and GnuTLS compilations. Bug 1541.
2072 JH/11 Fix a crash in mime ACL when meeting a zero-length, quoted or RFC2047-
2073 encoded parameter in the incoming message. Bug 1558.
2075 JH/12 Bug 1527: Autogrow buffer used in reading spool files. Since they now
2076 include certificate info, eximon was claiming there were spoolfile
2079 JH/13 Bug 1521: Fix ldap lookup for single-attr request, multiple-attr return.
2081 JH/14 Log delivery-related information more consistently, using the sequence
2082 "H=<name> [<ip>]" wherever possible.
2084 TL/07 Bug 1547: Omit RFCs from release. Draft and RFCs have licenses which
2085 are problematic for Debian distribution, omit them from the release
2088 JH/15 Updates and fixes to the EXPERIMENTAL_DSN feature.
2090 JH/16 Fix string representation of time values on 64bit time_t architectures.
2093 JH/17 Fix a null-indirection in certextract expansions when a nondefault
2094 output list separator was used.
2099 TL/01 Bugzilla 1506: Re-add a 'return NULL' to silence complaints from static
2100 checkers that were complaining about end of non-void function with no
2103 JH/01 Bug 1513: Fix parsing of quoted parameter values in MIME headers.
2104 This was a regression introduced in 4.83 by another bugfix.
2106 JH/02 Fix broken compilation when EXPERIMENTAL_DSN is enabled.
2108 TL/02 Bug 1509: Fix exipick for enhanced spoolfile specification used when
2109 EXPERIMENTAL_DSN is enabled. Fix from Wolfgang Breyha.
2115 TF/01 Correctly close the server side of TLS when forking for delivery.
2117 When a message was received over SMTP with TLS, Exim failed to clear up
2118 the incoming connection properly after forking off the child process to
2119 deliver the message. In some situations the subsequent outgoing
2120 delivery connection happened to have the same fd number as the incoming
2121 connection previously had. Exim would try to use TLS and fail, logging
2122 a "Bad file descriptor" error.
2124 TF/02 Portability fix for building lookup modules on Solaris when the xpg4
2125 utilities have not been installed.
2127 JH/01 Fix memory-handling in use of acl as a conditional; avoid free of
2128 temporary space as the ACL may create new global variables.
2130 TL/01 LDAP support uses per connection or global context settings, depending
2131 upon the detected version of the libraries at build time.
2133 TL/02 Experimental Proxy Protocol support: allows a proxied SMTP connection
2134 to extract and use the src ip:port in logging and expansions as if it
2135 were a direct connection from the outside internet. PPv2 support was
2136 updated based on HAProxy spec change in May 2014.
2138 JH/02 Add ${listextract {number}{list}{success}{fail}}.
2140 TL/03 Bugzilla 1433: Fix DMARC SEGV with specific From header contents.
2141 Properly escape header and check for NULL return.
2143 PP/01 Continue incomplete 4.82 PP/19 by fixing docs too: use dns_dnssec_ok
2146 JH/03 Bugzilla 1157: support log_selector smtp_confirmation for lmtp.
2148 TL/04 Add verify = header_names_ascii check to reject email with non-ASCII
2149 characters in header names, implemented as a verify condition.
2150 Contributed by Michael Fischer v. Mollard.
2152 TL/05 Rename SPF condition results err_perm and err_temp to standardized
2153 results permerror and temperror. Previous values are deprecated but
2154 still accepted. In a future release, err_perm and err_temp will be
2155 completely removed, which will be a backward incompatibility if the
2156 ACL tests for either of these two old results. Patch contributed by
2157 user bes-internal on the mailing list.
2159 JH/04 Add ${utf8clean:} operator. Contributed by Alex Rau.
2161 JH/05 Bugzilla 305: Log incoming-TLS details on rejects, subject to log
2162 selectors, in both main and reject logs.
2164 JH/06 Log outbound-TLS and port details, subject to log selectors, for a
2167 JH/07 Add malware type "sock" for talking to simple daemon.
2169 JH/08 Bugzilla 1371: Add tls_{,try_}verify_hosts to smtp transport.
2171 JH/09 Bugzilla 1431: Support (with limitations) headers_add/headers_remove in
2172 routers/transports under cutthrough routing.
2174 JH/10 Bugzilla 1005: ACL "condition =" should accept values which are negative
2175 numbers. Touch up "bool" conditional to keep the same definition.
2177 TL/06 Remove duplicated language in spec file from 4.82 TL/16.
2179 JH/11 Add dnsdb tlsa lookup. From Todd Lyons.
2181 JH/12 Expand items in router/transport headers_add or headers_remove lists
2182 individually rather than the list as a whole. Bug 1452.
2184 Required for reasonable handling of multiple headers_ options when
2185 they may be empty; requires that headers_remove items with embedded
2186 colons must have them doubled (or the list-separator changed).
2188 TL/07 Add new dmarc expansion variable $dmarc_domain_policy to directly
2189 view the policy declared in the DMARC record. Currently, $dmarc_status
2190 is a combined value of both the record presence and the result of the
2193 JH/13 Fix handling of $tls_cipher et.al. in (non-verify) transport. Bug 1455.
2195 JH/14 New options dnssec_request_domains, dnssec_require_domains on the
2196 dnslookup router and the smtp transport (applying to the forward
2199 TL/08 Bugzilla 1453: New LDAP "SERVERS=" option allows admin to override list
2200 of ldap servers used for a specific lookup. Patch provided by Heiko
2203 JH/18 New options dnssec_lax, dnssec_strict on dnsdb lookups.
2204 New variable $lookup_dnssec_authenticated for observability.
2206 TL/09 Bugzilla 609: Add -C option to exiqgrep, specify which exim.conf to use.
2207 Patch submitted by Lars Timman.
2209 JH/19 EXPERIMENTAL_OCSP support under GnuTLS. Bug 1459.
2211 TL/10 Bugzilla 1454: New -oMm option to pass message reference to Exim.
2212 Requires trusted mode and valid format message id, aborts otherwise.
2213 Patch contributed by Heiko Schlichting.
2215 JH/20 New expansion variables tls_(in,out)_(our,peer)cert, and expansion item
2216 certextract with support for various fields. Bug 1358.
2218 JH/21 Observability of OCSP via variables tls_(in,out)_ocsp. Stapling
2219 is requested by default, modifiable by smtp transport option
2222 JH/22 Expansion operators ${md5:string} and ${sha1:string} can now
2223 operate on certificate variables to give certificate fingerprints
2224 Also new ${sha256:cert_variable}.
2226 JH/23 The PRDR feature is moved from being Experimental into the mainline.
2228 TL/11 Bug 1119: fix memory allocation in string_printing2(). Patch from
2229 Christian Aistleitner.
2231 JH/24 The OCSP stapling feature is moved from Experimental into the mainline.
2233 TL/12 Bug 1444: Fix improper \r\n sequence handling when writing spool
2234 file. Patch from Wolfgang Breyha.
2236 JH/25 Expand the coverage of the delivery $host and $host_address to
2237 client authenticators run in verify callout. Bug 1476.
2239 JH/26 Port service names are now accepted for tls_on_connect_ports, to
2240 align with daemon_smtp_ports. Bug 72.
2242 TF/03 Fix udpsend. The ip_connectedsocket() function's socket type
2243 support and error reporting did not work properly.
2245 TL/13 Bug 1495: Exiqgrep check if -C config file specified on cli exists
2246 and is readable. Patch from Andrew Colin Kissa.
2248 TL/14 Enhance documentation of ${run expansion and how it parses the
2249 commandline after expansion, particularly in the case when an
2250 unquoted variable expansion results in an empty value.
2252 JH/27 The TLS SNI feature was broken in 4.82. Fix it.
2254 PP/02 Fix internal collision of T_APL on systems which support RFC3123
2255 by renaming away from it. Addresses GH issue 15, reported by
2258 JH/28 Fix parsing of MIME headers for parameters with quoted semicolons.
2260 TL/15 SECURITY: prevent double expansion in math comparison functions
2261 (can expand unsanitized data). Not remotely exploitable.
2268 PP/01 Add -bI: framework, and -bI:sieve for querying sieve capabilities.
2270 PP/02 Make -n do something, by making it not do something.
2271 When combined with -bP, the name of an option is not output.
2273 PP/03 Added tls_dh_min_bits SMTP transport driver option, only honoured
2276 PP/04 First step towards DNSSEC, provide $sender_host_dnssec for
2277 $sender_host_name and config options to manage this, and basic check
2280 PP/05 DSCP support for outbound connections and control modifier for inbound.
2282 PP/06 Cyrus SASL: set local and remote IP;port properties for driver.
2283 (Only plugin which currently uses this is kerberos4, which nobody should
2284 be using, but we should make it available and other future plugins might
2285 conceivably use it, even though it would break NAT; stuff *should* be
2286 using channel bindings instead).
2288 PP/07 Handle "exim -L <tag>" to indicate to use syslog with tag as the process
2289 name; added for Sendmail compatibility; requires admin caller.
2290 Handle -G as equivalent to "control = suppress_local_fixups" (we used to
2291 just ignore it); requires trusted caller.
2292 Also parse but ignore: -Ac -Am -X<logfile>
2295 TL/01 Bugzilla 1258 - Refactor MAIL FROM optional args processing.
2297 TL/02 Add +smtp_confirmation as a default logging option.
2299 TL/03 Bugzilla 198 - Implement remove_header ACL modifier.
2300 Patch by Magnus Holmgren from 2007-02-20.
2302 TL/04 Bugzilla 1281 - Spec typo.
2303 Bugzilla 1283 - Spec typo.
2304 Bugzilla 1290 - Spec grammar fixes.
2306 TL/05 Bugzilla 1285 - Spec omission, fix docbook errors for spec.txt creation.
2308 TL/06 Add Experimental DMARC support using libopendmarc libraries.
2310 TL/07 Fix an out of order global option causing a segfault. Reported to dev
2311 mailing list by by Dmitry Isaikin.
2313 JH/01 Bugzilla 1201 & 304 - New cutthrough-delivery feature, with TLS support.
2315 JH/02 Support "G" suffix to numbers in ${if comparisons.
2317 PP/08 Handle smtp transport tls_sni option forced-fail for OpenSSL.
2319 NM/01 Bugzilla 1197 - Spec typo
2320 Bugzilla 1196 - Spec examples corrections
2322 JH/03 Add expansion operators ${listnamed:name} and ${listcount:string}
2324 PP/09 Add gnutls_allow_auto_pkcs11 option (was originally called
2325 gnutls_enable_pkcs11, but renamed to more accurately indicate its
2328 PP/10 Let Linux makefile inherit CFLAGS/CFLAGS_DYNAMIC.
2329 Pulled from Debian 30_dontoverridecflags.dpatch by Andreas Metzler.
2331 JH/04 Add expansion item ${acl {name}{arg}...}, expansion condition
2332 "acl {{name}{arg}...}", and optional args on acl condition
2335 JH/05 Permit multiple router/transport headers_add/remove lines.
2337 JH/06 Add dnsdb pseudo-lookup "a+" to do an "aaaa" + "a" combination.
2339 JH/07 Avoid using a waiting database for a single-message-only transport.
2340 Performance patch from Paul Fisher. Bugzilla 1262.
2342 JH/08 Strip leading/trailing newlines from add_header ACL modifier data.
2345 JH/09 Add $headers_added variable, with content from use of ACL modifier
2346 add_header (but not yet added to the message). Bugzilla 199.
2348 JH/10 Add 8bitmime log_selector, for 8bitmime status on the received line.
2349 Pulled from Bugzilla 817 by Wolfgang Breyha.
2351 PP/11 SECURITY: protect DKIM DNS decoding from remote exploit.
2353 (nb: this is the same fix as in Exim 4.80.1)
2355 JH/11 Add A= logging on delivery lines, and a client_set_id option on
2358 JH/12 Add optional authenticated_sender logging to A= and a log_selector
2361 PP/12 Unbreak server_set_id for NTLM/SPA auth, broken by 4.80 PP/29.
2363 PP/13 Dovecot auth: log better reason to rejectlog if Dovecot did not
2364 advertise SMTP AUTH mechanism to us, instead of a generic
2365 protocol violation error. Also, make Exim more robust to bad
2366 data from the Dovecot auth socket.
2368 TF/01 Fix ultimate retry timeouts for intermittently deliverable recipients.
2370 When a queue runner is handling a message, Exim first routes the
2371 recipient addresses, during which it prunes them based on the retry
2372 hints database. After that it attempts to deliver the message to
2373 any remaining recipients. It then updates the hints database using
2376 So if a recipient address works intermittently, it can get repeatedly
2377 deferred at routing time. The retry hints record remains fresh so the
2378 address never reaches the final cutoff time.
2380 This is a fairly common occurrence when a user is bumping up against
2381 their storage quota. Exim had some logic in its local delivery code
2382 to deal with this. However it did not apply to per-recipient defers
2383 in remote deliveries, e.g. over LMTP to a separate IMAP message store.
2385 This change adds a proper retry rule check during routing so that the
2386 final cutoff time is checked against the message's age. We only do
2387 this check if there is an address retry record and there is not a
2388 domain retry record; this implies that previous attempts to handle
2389 the address had the retry_use_local_parts option turned on. We use
2390 this as an approximation for the destination being like a local
2391 delivery, as in LMTP.
2393 I suspect this new check makes the old local delivery cutoff check
2394 redundant, but I have not verified this so I left the code in place.
2396 TF/02 Correct gecos expansion when From: is a prefix of the username.
2398 Test 0254 submits a message to Exim with the header
2402 When I ran the test suite under the user fanf2, Exim expanded
2403 the header to contain my full name, whereas it should have added
2404 a Resent-Sender: header. It erroneously treats any prefix of the
2405 username as equal to the username.
2407 This change corrects that bug.
2409 GF/01 DCC debug and logging tidyup
2410 Error conditions log to paniclog rather than rejectlog.
2411 Debug lines prefixed by "DCC: " to remove any ambiguity.
2413 TF/03 Avoid unnecessary rebuilds of lookup-related code.
2415 PP/14 Fix OCSP reinitialisation in SNI handling for Exim/TLS as server.
2416 Bug spotted by Jeremy Harris; was flawed since initial commit.
2417 Would have resulted in OCSP responses post-SNI triggering an Exim
2418 NULL dereference and crash.
2420 JH/13 Add $router_name and $transport_name variables. Bugzilla 308.
2422 PP/15 Define SIOCGIFCONF_GIVES_ADDR for GNU Hurd.
2423 Bug detection, analysis and fix by Samuel Thibault.
2424 Bugzilla 1331, Debian bug #698092.
2426 SC/01 Update eximstats to watch out for senders sending 'HELO [IpAddr]'
2428 JH/14 SMTP PRDR (http://www.eric-a-hall.com/specs/draft-hall-prdr-00.txt).
2429 Server implementation by Todd Lyons, client by JH.
2430 Only enabled when compiled with EXPERIMENTAL_PRDR. A new
2431 config variable "prdr_enable" controls whether the server
2432 advertises the facility. If the client requests PRDR a new
2433 acl_data_smtp_prdr ACL is called once for each recipient, after
2434 the body content is received and before the acl_smtp_data ACL.
2435 The client is controlled by both of: a hosts_try_prdr option
2436 on the smtp transport, and the server advertisement.
2437 Default client logging of deliveries and rejections involving
2438 PRDR are flagged with the string "PRDR".
2440 PP/16 Fix problems caused by timeouts during quit ACLs trying to double
2441 fclose(). Diagnosis by Todd Lyons.
2443 PP/17 Update configure.default to handle IPv6 localhost better.
2444 Patch by Alain Williams (plus minor tweaks).
2447 PP/18 OpenSSL made graceful with empty tls_verify_certificates setting.
2448 This is now consistent with GnuTLS, and is now documented: the
2449 previous undocumented portable approach to treating the option as
2450 unset was to force an expansion failure. That still works, and
2451 an empty string is now equivalent.
2453 PP/19 Renamed DNSSEC-enabling option to "dns_dnssec_ok", to make it
2454 clearer that Exim is using the DO (DNSSEC OK) EDNS0 resolver flag,
2455 not performing validation itself.
2457 PP/20 Added force_command boolean option to pipe transport.
2458 Patch from Nick Koston, of cPanel Inc.
2460 JH/15 AUTH support on callouts (and hence cutthrough-deliveries).
2463 TF/04 Added udpsend ACL modifier and hexquote expansion operator
2465 PP/21 Fix eximon continuous updating with timestamped log-files.
2466 Broken in a format-string cleanup in 4.80, missed when I repaired the
2467 other false fix of the same issue.
2468 Report and fix from Heiko Schlichting.
2471 PP/22 Guard LDAP TLS usage against Solaris LDAP variant.
2472 Report from Prashanth Katuri.
2474 PP/23 Support safari_ecdhe_ecdsa_bug for openssl_options.
2475 It's SecureTransport, so affects any MacOS clients which use the
2476 system-integrated TLS libraries, including email clients.
2478 PP/24 Fix segfault from trying to fprintf() to a NULL stdio FILE* if
2479 using a MIME ACL for non-SMTP local injection.
2480 Report and assistance in diagnosis by Warren Baker.
2482 TL/08 Adjust exiqgrep to be case-insensitive for sender/receiver.
2484 JH/16 Fix comparisons for 64b. Bugzilla 1385.
2486 TL/09 Add expansion variable $authenticated_fail_id to keep track of
2487 last id that failed so it may be referenced in subsequent ACL's.
2489 TL/10 Bugzilla 1375 - Prevent TLS rebinding in ldap. Patch provided by
2492 TL/11 Bugzilla 1382 - Option ldap_require_cert overrides start_tls
2493 ldap library initialization, allowing self-signed CA's to be
2494 used. Also properly sets require_cert option later in code by
2495 using NULL (global ldap config) instead of ldap handle (per
2496 session). Bug diagnosis and testing by alxgomz.
2498 TL/12 Enhanced documentation in the ratelimit.pl script provided in
2499 the src/util/ subdirectory.
2501 TL/13 Bug 1031 - Imported transport SQL logging patch from Axel Rau
2502 renamed to Transport Post Delivery Action by Jeremy Harris, as
2505 TL/14 Bugzilla 1217 - Redis lookup support has been added. It is only enabled
2506 when Exim is compiled with EXPERIMENTAL_REDIS. A new config variable
2507 redis_servers = needs to be configured which will be used by the redis
2508 lookup. Patch from Warren Baker, of The Packet Hub.
2510 TL/15 Fix exiqsumm summary for corner case. Patch provided by Richard Hall.
2512 TL/16 Bugzilla 1289 - Clarify host/ip processing when have errors looking up a
2513 hostname or reverse DNS when processing a host list. Used suggestions
2514 from multiple comments on this bug.
2516 TL/17 Bugzilla 1057 - Multiple clamd TCP targets patch from Mark Zealey.
2518 TL/18 Had previously added a -CONTINUE option to runtest in the test suite.
2519 Missed a few lines, added it to make the runtest require no keyboard
2522 TL/19 Bugzilla 1402 - Test 533 fails if any part of the path to the test suite
2523 contains upper case chars. Make router use caseful_local_part.
2525 TL/20 Bugzilla 1400 - Add AVOID_GNUTLS_PKCS11 build option. Allows GnuTLS
2526 support when GnuTLS has been built with p11-kit.
2532 PP/01 SECURITY: protect DKIM DNS decoding from remote exploit.
2534 This, or similar/improved, will also be change PP/11 of 4.82.
2540 PP/01 Handle short writes when writing local log-files.
2541 In practice, only affects FreeBSD (8 onwards).
2542 Bugzilla 1053, with thanks to Dmitry Isaikin.
2544 NM/01 Bugzilla 949 - Documentation tweak
2546 NM/02 Bugzilla 1093 - eximstats DATA reject detection regexps
2549 NM/03 Bugzilla 1169 - primary_hostname spelling was incorrect in docs.
2551 PP/02 Implemented gsasl authenticator.
2553 PP/03 Implemented heimdal_gssapi authenticator with "server_keytab" option.
2555 PP/04 Local/Makefile support for (AUTH|LOOKUP)_*_PC=foo to use
2556 `pkg-config foo` for cflags/libs.
2558 PP/05 Swapped $auth1/$auth2 for gsasl GSSAPI mechanism, to be more consistent
2559 with rest of GSASL and with heimdal_gssapi.
2561 PP/06 Local/Makefile support for USE_(GNUTLS|OPENSSL)_PC=foo to use
2562 `pkg-config foo` for cflags/libs for the TLS implementation.
2564 PP/07 New expansion variable $tls_bits; Cyrus SASL server connection
2565 properties get this fed in as external SSF. A number of robustness
2566 and debugging improvements to the cyrus_sasl authenticator.
2568 PP/08 cyrus_sasl server now expands the server_realm option.
2570 PP/09 Bugzilla 1214 - Log authentication information in reject log.
2571 Patch by Jeremy Harris.
2573 PP/10 Added dbmjz lookup type.
2575 PP/11 Let heimdal_gssapi authenticator take a SASL message without an authzid.
2577 PP/12 MAIL args handles TAB as well as SP, for better interop with
2578 non-compliant senders.
2579 Analysis and variant patch by Todd Lyons.
2581 NM/04 Bugzilla 1237 - fix cases where printf format usage not indicated
2582 Bug report from Lars Müller <lars@samba.org> (via SUSE),
2583 Patch from Dirk Mueller <dmueller@suse.com>
2585 PP/13 tls_peerdn now print-escaped for spool files.
2586 Observed some $tls_peerdn in wild which contained \n, which resulted
2587 in spool file corruption.
2589 PP/14 TLS fixes for OpenSSL: support TLS 1.1 & 1.2; new "openssl_options"
2590 values; set SSL_MODE_AUTO_RETRY so that OpenSSL will retry a read
2591 or write after TLS renegotiation, which otherwise led to messages
2594 TK/01 Bugzilla 1239 - fix DKIM verification when signature was not inserted
2595 as a tracking header (ie: a signed header comes before the signature).
2596 Patch from Wolfgang Breyha.
2598 JH/01 Bugzilla 660 - Multi-valued attributes from ldap now parseable as a
2599 comma-sep list; embedded commas doubled.
2601 JH/02 Refactored ACL "verify =" logic to table-driven dispatch.
2603 PP/15 LDAP: Check for errors of TLS initialisation, to give correct
2605 Report and patch from Dmitry Banschikov.
2607 PP/16 Removed "dont_insert_empty_fragments" from "openssl_options".
2608 Removed SSL_clear() after SSL_new() which led to protocol negotiation
2609 failures. We appear to now support TLS1.1+ with Exim.
2611 PP/17 OpenSSL: new expansion var $tls_sni, which if used in tls_certificate
2612 lets Exim select keys and certificates based upon TLS SNI from client.
2613 Also option tls_sni on SMTP Transports. Also clear $tls_bits correctly
2614 before an outbound SMTP session. New log_selector, +tls_sni.
2616 PP/18 Bugzilla 1122 - check localhost_number expansion for failure, avoid
2617 NULL dereference. Report and patch from Alun Jones.
2619 PP/19 DNS resolver init changes for NetBSD compatibility. (Risk of breakage
2620 on less well tested platforms). Obviates NetBSD pkgsrc patch-ac.
2621 Not seeing resolver debug output on NetBSD, but suspect this is a
2622 resolver implementation change.
2624 PP/20 Revert part of NM/04, it broke log_path containing %D expansions.
2625 Left warnings. Added "eximon gdb" invocation mode.
2627 PP/21 Defaulting "accept_8bitmime" to true, not false.
2629 PP/22 Added -bw for inetd wait mode support.
2631 PP/23 Added PCRE_CONFIG=yes support to Makefile for using pcre-config to
2632 locate the relevant includes and libraries. Made this the default.
2634 PP/24 Fixed headers_only on smtp transports (was not sending trailing dot).
2635 Bugzilla 1246, report and most of solution from Tomasz Kusy.
2637 JH/03 ${eval } now uses 64-bit and supports a "g" suffix (like to "k" and "m").
2638 This may cause build issues on older platforms.
2640 PP/25 Revamped GnuTLS support, passing tls_require_ciphers to
2641 gnutls_priority_init, ignoring Exim options gnutls_require_kx,
2642 gnutls_require_mac & gnutls_require_protocols (no longer supported).
2643 Added SNI support via GnuTLS too.
2644 Made ${randint:..} supplier available, if using not-too-old GnuTLS.
2646 PP/26 Added EXPERIMENTAL_OCSP for OpenSSL.
2648 PP/27 Applied dnsdb SPF support patch from Janne Snabb.
2649 Applied second patch from Janne, implementing suggestion to default
2650 multiple-strings-in-record handling to match SPF spec.
2652 JH/04 Added expansion variable $tod_epoch_l for a higher-precision time.
2654 PP/28 Fix DCC dcc_header content corruption (stack memory referenced,
2655 read-only, out of scope).
2656 Patch from Wolfgang Breyha, report from Stuart Northfield.
2658 PP/29 Fix three issues highlighted by clang analyser static analysis.
2659 Only crash-plausible issue would require the Cambridge-specific
2660 iplookup router and a misconfiguration.
2661 Report from Marcin Mirosław.
2663 PP/30 Another attempt to deal with PCRE_PRERELEASE, this one less buggy.
2665 PP/31 %D in printf continues to cause issues (-Wformat=security), so for
2666 now guard some of the printf checks behind WANT_DEEPER_PRINTF_CHECKS.
2667 As part of this, removing so much warning spew let me fix some minor
2668 real issues in debug logging.
2670 PP/32 GnuTLS was always using default tls_require_ciphers, due to a missing
2671 assignment on my part. Fixed.
2673 PP/33 Added tls_dh_max_bits option, defaulting to current hard-coded limit
2674 of NSS, for GnuTLS/NSS interop. Problem root cause diagnosis by
2675 Janne Snabb (who went above and beyond: thank you).
2677 PP/34 Validate tls_require_ciphers on startup, since debugging an invalid
2678 string otherwise requires a connection and a bunch more work and it's
2679 relatively easy to get wrong. Should also expose TLS library linkage
2682 PP/35 Pull in <features.h> on Linux, for some portability edge-cases of
2683 64-bit ${eval} (JH/03).
2685 PP/36 Define _GNU_SOURCE in exim.h; it's needed for some releases of
2686 GNU libc to support some of the 64-bit stuff, should not lead to
2687 conflicts. Defined before os.h is pulled in, so if a given platform
2688 needs to override this, it can.
2690 PP/37 Unbreak Cyrus SASL auth: SSF retrieval was incorrect, Exim thought
2691 protection layer was required, which is not implemented.
2692 Bugzilla 1254, patch from Wolfgang Breyha.
2694 PP/38 Overhaul DH prime handling, supply RFC-specified DH primes as built
2695 into Exim, default to IKE id 23 from RFC 5114 (2048 bit). Make
2696 tls_dhparam take prime identifiers. Also unbreak combination of
2697 OpenSSL+DH_params+TLSSNI.
2699 PP/39 Disable SSLv2 by default in OpenSSL support.
2705 PP/01 Solaris build fix for Oracle's LDAP libraries.
2706 Bugzilla 1109, patch from Stephen Usher.
2708 TF/01 HP/UX build fix: avoid arithmetic on a void pointer.
2710 TK/01 DKIM Verification: Fix relaxed canon for empty headers w/o
2713 TF/02 Fix a couple more cases where we did not log the error message
2714 when unlink() failed. See also change 4.74-TF/03.
2716 TF/03 Make the exiwhat support code safe for signals. Previously Exim might
2717 lock up or crash if it happened to be inside a call to libc when it
2718 got a SIGUSR1 from exiwhat.
2720 The SIGUSR1 handler appends the current process status to the process
2721 log which is later printed by exiwhat. It used to use the general
2722 purpose logging code to do this, but several functions it calls are
2723 not safe for signals.
2725 The new output code in the SIGUSR1 handler is specific to the process
2726 log, and simple enough that it's easy to inspect for signal safety.
2727 Removing some special cases also simplifies the general logging code.
2728 Removing the spurious timestamps from the process log simplifies
2731 TF/04 Improved ratelimit ACL condition.
2733 The /noupdate option has been deprecated in favour of /readonly which
2734 has clearer semantics. The /leaky, /strict, and /readonly update modes
2735 are mutually exclusive. The update mode is no longer included in the
2736 database key; it just determines when the database is updated. (This
2737 means that when you upgrade Exim will forget old rate measurements.)
2739 Exim now checks that the per_* options are used with an update mode that
2740 makes sense for the current ACL. For example, when Exim is processing a
2741 message (e.g. acl_smtp_rcpt or acl_smtp_data, etc.) you can specify
2742 per_mail/leaky or per_mail/strict; otherwise (e.g. in acl_smtp_helo) you
2743 must specify per_mail/readonly. If you omit the update mode it defaults to
2744 /leaky where that makes sense (as before) or /readonly where required.
2746 The /noupdate option is now undocumented but still supported for
2747 backwards compatibility. It is equivalent to /readonly except that in
2748 ACLs where /readonly is required you may specify /leaky/noupdate or
2749 /strict/noupdate which are treated the same as /readonly.
2751 A useful new feature is the /count= option. This is a generalization
2752 of the per_byte option, so that you can measure the throughput of other
2753 aggregate values. For example, the per_byte option is now equivalent
2754 to per_mail/count=${if >{0}{$message_size} {0} {$message_size} }.
2756 The per_rcpt option has been generalized using the /count= mechanism
2757 (though it's more complicated than the per_byte equivalence). When it is
2758 used in acl_smtp_rcpt, the per_rcpt option adds recipients to the
2759 measured rate one at a time; if it is used later (e.g. in acl_smtp_data)
2760 or in a non-SMTP ACL it adds all the recipients in one go. (The latter
2761 /count=$recipients_count behaviour used to work only in non-SMTP ACLs.)
2762 Note that using per_rcpt with a non-readonly update mode in more than
2763 one ACL will cause the recipients to be double-counted. (The per_mail
2764 and per_byte options don't have this problem.)
2766 The handling of very low rates has changed slightly. If the computed rate
2767 is less than the event's count (usually one) then this event is the first
2768 after a long gap. In this case the rate is set to the same as this event's
2769 count, so that the first message of a spam run is counted properly.
2771 The major new feature is a mechanism for counting the rate of unique
2772 events. The new per_addr option counts the number of different
2773 recipients that someone has sent messages to in the last time period. It
2774 behaves like per_rcpt if all the recipient addresses are different, but
2775 duplicate recipient addresses do not increase the measured rate. Like
2776 the /count= option this is a general mechanism, so the per_addr option
2777 is equivalent to per_rcpt/unique=$local_part@$domain. You can, for
2778 example, measure the rate that a client uses different sender addresses
2779 with the options per_mail/unique=$sender_address. There are further
2780 details in the main documentation.
2782 TF/05 Removed obsolete $Cambridge$ CVS revision strings.
2784 TF/06 Removed a few PCRE remnants.
2786 TF/07 Automatically extract Exim's version number from tags in the git
2787 repository when doing development or release builds.
2789 PP/02 Raise smtp_cmd_buffer_size to 16kB.
2790 Bugzilla 879. Patch from Paul Fisher.
2792 PP/03 Implement SSL-on-connect outbound with protocol=smtps on smtp transport.
2793 Heavily based on revision 40f9a89a from Simon Arlott's tree.
2796 PP/04 Use .dylib instead of .so for dynamic library loading on MacOS.
2798 PP/05 Variable $av_failed, true if the AV scanner deferred.
2799 Bugzilla 1078. Patch from John Horne.
2801 PP/06 Stop make process more reliably on build failure.
2802 Bugzilla 1087. Patch from Heiko Schlittermann.
2804 PP/07 Make maildir_use_size_file an _expandable_ boolean.
2805 Bugzilla 1089. Patch from Heiko Schlittermann.
2807 PP/08 Handle ${run} returning more data than OS pipe buffer size.
2808 Bugzilla 1131. Patch from Holger Weiß.
2810 PP/09 Handle IPv6 addresses with SPF.
2811 Bugzilla 860. Patch from Wolfgang Breyha.
2813 PP/10 GnuTLS: support TLS 1.2 & 1.1.
2815 Use gnutls_certificate_verify_peers2() [patch from Andreas Metzler].
2818 PP/11 match_* no longer expand right-hand-side by default.
2819 New compile-time build option, EXPAND_LISTMATCH_RHS.
2820 New expansion conditions, "inlist", "inlisti".
2822 PP/12 fix uninitialised greeting string from PP/03 (smtps client support).
2824 PP/13 shell and compiler warnings fixes for RC1-RC4 changes.
2826 PP/14 fix log_write() format string regression from TF/03.
2827 Bugzilla 1152. Patch from Dmitry Isaikin.
2833 PP/01 The new ldap_require_cert option would segfault if used. Fixed.
2835 PP/02 Harmonised TLS library version reporting; only show if debugging.
2836 Layout now matches that introduced for other libraries in 4.74 PP/03.
2838 PP/03 New openssl_options items: no_sslv2 no_sslv3 no_ticket no_tlsv1
2840 PP/04 New "dns_use_edns0" global option.
2842 PP/05 Don't segfault on misconfiguration of ref:name exim-user as uid.
2845 PP/06 Extra paranoia around buffer usage at the STARTTLS transition.
2846 nb: Exim is not vulnerable to http://www.kb.cert.org/vuls/id/555316
2848 TK/01 Updated PolarSSL code to 0.14.2.
2849 Bugzilla 1097. Patch from Andreas Metzler.
2851 PP/07 Catch divide-by-zero in ${eval:...}.
2852 Fixes bugzilla 1102.
2854 PP/08 Condition negation of bool{}/bool_lax{} did not negate. Fixed.
2857 TK/02 Bugzilla 1106: CVE-2011-1764 - DKIM log line was subject to a
2858 format-string attack -- SECURITY: remote arbitrary code execution.
2860 TK/03 SECURITY - DKIM signature header parsing was double-expanded, second
2861 time unintentionally subject to list matching rules, letting the header
2862 cause arbitrary Exim lookups (of items which can occur in lists, *not*
2863 arbitrary string expansion). This allowed for information disclosure.
2865 PP/09 Fix another SIGFPE (x86) in ${eval:...} expansion, this time related to
2866 INT_MIN/-1 -- value coerced to INT_MAX.
2872 NM/01 Workaround for PCRE version dependency in version reporting
2875 TF/01 Update valgrind.h and memcheck.h to copies from valgrind-3.6.0.
2876 This fixes portability to compilers other than gcc, notably
2877 Solaris CC and HP-UX CC. Fixes Bugzilla 1050.
2879 TF/02 Bugzilla 139: Avoid using the += operator in the modular lookup
2880 makefiles for portability to HP-UX and POSIX correctness.
2882 PP/01 Permit LOOKUP_foo enabling on the make command-line.
2883 Also via indented variable definition in the Makefile.
2884 (Debugging by Oliver Heesakkers).
2886 PP/02 Restore caching of spamd results with expanded spamd_address.
2887 Patch from author of expandable spamd_address patch, Wolfgang Breyha.
2889 PP/03 Build issue: lookups-Makefile now exports LC_ALL=C
2890 Improves build reliability. Fix from: Frank Elsner
2892 NM/02 Fix wide character breakage in the rfc2047 coding
2893 Fixes bug 1064. Patch from Andrey N. Oktyabrski
2895 NM/03 Allow underscore in dnslist lookups
2896 Fixes bug 1026. Patch from Graeme Fowler
2898 PP/04 Bugzilla 230: Support TLS-enabled LDAP (in addition to ldaps).
2899 Code patches from Adam Ciarcinski of NetBSD.
2901 NM/04 Fixed exiqgrep to cope with mailq missing size issue
2904 PP/05 Bugzilla 1083: when lookup expansion defers, escape the output which
2905 is logged, to avoid truncation. Patch from John Horne.
2907 PP/06 Bugzilla 1042: implement freeze_signal on pipe transports.
2908 Patch from Jakob Hirsch.
2910 PP/07 Bugzilla 1061: restrict error messages sent over SMTP to not reveal
2911 SQL string expansion failure details.
2912 Patch from Andrey Oktyabrski.
2914 PP/08 Bugzilla 486: implement %M datestamping in log filenames.
2915 Patch from Simon Arlott.
2917 PP/09 New lookups functionality failed to compile on old gcc which rejects
2918 extern declarations in function scope.
2919 Patch from Oliver Fleischmann
2921 PP/10 Use sig_atomic_t for flags set from signal handlers.
2922 Check getgroups() return and improve debugging.
2923 Fixed developed for diagnosis in bug 927 (which turned out to be
2926 PP/11 Bugzilla 1055: Update $message_linecount for maildir_tag.
2927 Patch from Mark Zealey.
2929 PP/12 Bugzilla 1056: Improved spamd server selection.
2930 Patch from Mark Zealey.
2932 PP/13 Bugzilla 1086: Deal with maildir quota file races.
2933 Based on patch from Heiko Schlittermann.
2935 PP/14 Bugzilla 1019: DKIM multiple signature generation fix.
2936 Patch from Uwe Doering, sign-off by Michael Haardt.
2938 NM/05 Fix to spam.c to accommodate older gcc versions which dislike
2939 variable declaration deep within a block. Bug and patch from
2942 PP/15 lookups-Makefile IRIX compatibility coercion.
2944 PP/16 Make DISABLE_DKIM build knob functional.
2946 NM/06 Bugzilla 968: child_open_uid: restore default SIGPIPE handler
2947 Patch by Simon Arlott
2949 TF/03 Fix valgrind.h portability to C89 compilers that do not support
2950 variable argument macros. Our copy now differs from upstream.
2956 TF/01 Failure to get a lock on a hints database can have serious
2957 consequences so log it to the panic log.
2959 TF/02 Log LMTP confirmation messages in the same way as SMTP,
2960 controlled using the smtp_confirmation log selector.
2962 TF/03 Include the error message when we fail to unlink a spool file.
2964 DW/01 Bugzilla 139: Support dynamically loaded lookups as modules.
2965 With thanks to Steve Haslam, Johannes Berg & Serge Demonchaux
2966 for maintaining out-of-tree patches for some time.
2968 PP/01 Bugzilla 139: Documentation and portability issues.
2969 Avoid GNU Makefile-isms, let Exim continue to build on BSD.
2970 Handle per-OS dynamic-module compilation flags.
2972 PP/02 Let /dev/null have normal permissions.
2973 The 4.73 fixes were a little too stringent and complained about the
2974 permissions on /dev/null. Exempt it from some checks.
2975 Reported by Andreas M. Kirchwitz.
2977 PP/03 Report version information for many libraries, including
2978 Exim version information for dynamically loaded libraries. Created
2979 version.h, now support a version extension string for distributors
2980 who patch heavily. Dynamic module ABI change.
2982 PP/04 CVE-2011-0017 - check return value of setuid/setgid. This is a
2983 privilege escalation vulnerability whereby the Exim run-time user
2984 can cause root to append content of the attacker's choosing to
2987 PP/05 Bugzilla 1041: merged DCC maintainer's fixes for return code.
2990 PP/06 Bugzilla 1071: fix delivery logging with untrusted macros.
2991 If dropping privileges for untrusted macros, we disabled normal logging
2992 on the basis that it would fail; for the Exim run-time user, this is not
2993 the case, and it resulted in successful deliveries going unlogged.
2994 Fixed. Reported by Andreas Metzler.
3000 PP/01 Date: & Message-Id: revert to normally being appended to a message,
3001 only prepend for the Resent-* case. Fixes regression introduced in
3002 Exim 4.70 by NM/22 for Bugzilla 607.
3004 PP/02 Include check_rfc2047_length in configure.default because we're seeing
3005 increasing numbers of administrators be bitten by this.
3007 JJ/01 Added DISABLE_DKIM and comment to src/EDITME
3009 PP/03 Bugzilla 994: added openssl_options main configuration option.
3011 PP/04 Bugzilla 995: provide better SSL diagnostics on failed reads.
3013 PP/05 Bugzilla 834: provide a permit_coredump option for pipe transports.
3015 PP/06 Adjust NTLM authentication to handle SASL Initial Response.
3017 PP/07 If TLS negotiated an anonymous cipher, we could end up with SSL but
3018 without a peer certificate, leading to a segfault because of an
3019 assumption that peers always have certificates. Be a little more
3020 paranoid. Problem reported by Martin Tscholak.
3022 PP/08 Bugzilla 926: switch ClamAV to use the new zINSTREAM API for content
3023 filtering; old API available if built with WITH_OLD_CLAMAV_STREAM=yes
3024 NB: ClamAV planning to remove STREAM in "middle of 2010".
3025 CL also introduces -bmalware, various -d+acl logging additions and
3026 more caution in buffer sizes.
3028 PP/09 Implemented reverse_ip expansion operator.
3030 PP/10 Bugzilla 937: provide a "debug" ACL control.
3032 PP/11 Bugzilla 922: Documentation dusting, patch provided by John Horne.
3034 PP/12 Bugzilla 973: Implement --version.
3036 PP/13 Bugzilla 752: Refuse to build/run if Exim user is root/0.
3038 PP/14 Build without WITH_CONTENT_SCAN. Path from Andreas Metzler.
3040 PP/15 Bugzilla 816: support multiple condition rules on Routers.
3042 PP/16 Add bool_lax{} expansion operator and use that for combining multiple
3043 condition rules, instead of bool{}. Make both bool{} and bool_lax{}
3044 ignore trailing whitespace.
3046 JJ/02 prevent non-panic DKIM error from being sent to paniclog
3048 JJ/03 added tcp_wrappers_daemon_name to allow host entries other than
3051 PP/17 Fix malware regression for cmdline scanner introduced in PP/08.
3052 Notification from Dr Andrew Aitchison.
3054 PP/18 Change ClamAV response parsing to be more robust and to handle ClamAV's
3055 ExtendedDetectionInfo response format.
3056 Notification from John Horne.
3058 PP/19 OpenSSL 1.0.0a compatibility const-ness change, should be backwards
3061 PP/20 Added a CONTRIBUTING file. Fixed the documentation build to use http:
3062 XSL and documented dependency on system catalogs, with examples of how
3065 DW/21 Added Valgrind hooks in store.c to help it capture out-of-bounds store
3068 DW/22 Bugzilla 1044: CVE-2010-4345 - partial fix: restrict default behaviour
3069 of CONFIGURE_OWNER and CONFIGURE_GROUP options to no longer allow a
3070 configuration file which is writeable by the Exim user or group.
3072 DW/23 Bugzilla 1044: CVE-2010-4345 - part two: extend checks for writeability
3073 of configuration files to cover files specified with the -C option if
3074 they are going to be used with root privileges, not just the default
3077 DW/24 Bugzilla 1044: CVE-2010-4345 - part three: remove ALT_CONFIG_ROOT_ONLY
3078 option (effectively making it always true).
3080 DW/25 Add TRUSTED_CONFIG_PREFIX_FILE option to allow alternative configuration
3081 files to be used while preserving root privileges.
3083 DW/26 Set FD_CLOEXEC on SMTP sockets after forking in the daemon, to ensure
3084 that rogue child processes cannot use them.
3086 PP/27 Bugzilla 1047: change the default for system_filter_user to be the Exim
3087 run-time user, instead of root.
3089 PP/28 Add WHITELIST_D_MACROS option to let some macros be overridden by the
3090 Exim run-time user without dropping privileges.
3092 DW/29 Remove use of va_copy() which breaks pre-C99 systems. Duplicate the
3093 result string, instead of calling string_vformat() twice with the same
3096 DW/30 Allow TRUSTED_CONFIG_PREFIX_FILE only for Exim or CONFIGURE_OWNER, not
3097 for other users. Others should always drop root privileges if they use
3098 -C on the command line, even for a whitelisted configure file.
3100 DW/31 Turn TRUSTED_CONFIG_PREFIX_FILE into TRUSTED_CONFIG_FILE. No prefixes.
3102 NM/01 Fixed bug #1002 - Message loss when using multiple deliveries
3108 JJ/01 installed exipick 20100104.1, adding $max_received_linelength,
3109 $data_path, and $header_path variables; fixed documentation bugs and
3112 JJ/02 installed exipick 20100222.0, added --input-dir and --finput to allow
3113 exipick to access non-standard spools, including the "frozen" queue
3116 NM/01 Bugzilla 965: Support mysql stored procedures.
3117 Patch from Alain Williams
3119 NM/02 Bugzilla 961: Spacing fix (syntax error) on Makefile directives for NetBSD
3121 NM/03 Bugzilla 955: Documentation fix for max_rcpts.
3122 Patch from Andreas Metzler
3124 NM/04 Bugzilla 954: Fix for unknown responses from Dovecot authenticator.
3125 Patch from Kirill Miazine
3127 NM/05 Bugzilla 671: Added umask to procmail example.
3129 JJ/03 installed exipick 20100323.0, fixing doc bug
3131 NM/06 Bugzilla 988: CVE-2010-2023 - prevent hardlink attack on sticky mail
3132 directory. Notification and patch from Dan Rosenberg.
3134 TK/01 PDKIM: Upgrade PolarSSL files to upstream version 0.12.1.
3136 TK/02 Improve log output when DKIM signing operation fails.
3138 MH/01 Treat the transport option dkim_domain as a colon separated
3139 list, not as a single string, and sign the message with each element,
3140 omitting multiple occurences of the same signer.
3142 NM/07 Null terminate DKIM strings, Null initialise DKIM variable
3143 Bugzilla 985, 986. Patch by Simon Arlott
3145 NM/08 Bugzilla 967. dnsdb DNS TXT record bug fix (DKIM-related)
3146 Patch by Simon Arlott
3148 PP/01 Bugzilla 989: CVE-2010-2024 - work round race condition on
3149 MBX locking. Notification from Dan Rosenberg.
3155 TK/01 Bugzilla 912: Fix DKIM segfault on empty headers/body.
3157 NM/01 Bugzilla 913: Documentation fix for gnutls_* options.
3159 NM/02 Bugzilla 722: Documentation for randint. Better randomness defaults.
3161 NM/03 Bugzilla 847: Enable DNSDB lookup by default.
3163 NM/04 Bugzilla 915: Flag broken perl installation during build.
3169 TK/01 Added patch by Johannes Berg that expands the main option
3170 "spamd_address" if it starts with a dollar sign.
3172 TK/02 Write list of recipients to X-Envelope-Sender header when building
3173 the mbox-format spool file for content scanning (suggested by Jakob
3176 TK/03 Added patch by Wolfgang Breyha that adds experimental DCC
3177 (http://www.dcc-servers.net/) support via dccifd. Activated by
3178 setting EXPERIMENTAL_DCC=yes in Local/Makefile.
3180 TK/04 Bugzilla 673: Add f-protd malware scanner support. Patch submitted
3181 by Mark Daniel Reidel <mr@df.eu>.
3183 NM/01 Bugzilla 657: Embedded PCRE removed from the exim source tree.
3184 When building exim an external PCRE library is now needed -
3185 PCRE is a system library on the majority of modern systems.
3186 See entry on PCRE_LIBS in EDITME file.
3188 NM/02 Bugzilla 646: Removed unwanted C/R in Dovecot authenticator
3189 conversation. Added nologin parameter to request.
3190 Patch contributed by Kirill Miazine.
3192 TF/01 Do not log submission mode rewrites if they do not change the address.
3194 TF/02 Bugzilla 662: Fix stack corruption before exec() in daemon.c.
3196 NM/03 Bugzilla 602: exicyclog now handles panic log, and creates empty
3197 log files in place. Contributed by Roberto Lima.
3199 NM/04 Bugzilla 667: Close socket used by dovecot authenticator.
3201 TF/03 Bugzilla 615: When checking the local_parts router precondition
3202 after a local_part_suffix or local_part_prefix option, Exim now
3203 does not use the address's named list lookup cache, since this
3204 contains cached lookups for the whole local part.
3206 NM/05 Bugzilla 521: Integrated SPF Best Guess support contributed by
3207 Robert Millan. Documentation is in experimental-spec.txt.
3209 TF/04 Bugzilla 668: Fix parallel build (make -j).
3211 NM/05.2 Bugzilla 437: Prevent Maildir aux files being created with mode 000.
3213 NM/05.3 Bugzilla 598: Improvement to Dovecot authenticator handling.
3214 Patch provided by Jan Srzednicki.
3216 TF/05 Leading white space used to be stripped from $spam_report which
3217 wrecked the formatting. Now it is preserved.
3219 TF/06 Save $spam_score, $spam_bar, and $spam_report in spool files, so
3220 that they are available at delivery time.
3222 TF/07 Fix the way ${extract is skipped in the untaken branch of a conditional.
3224 TF/08 TLS error reporting now respects the incoming_interface and
3225 incoming_port log selectors.
3227 TF/09 Produce a more useful error message if an SMTP transport's hosts
3228 setting expands to an empty string.
3230 NM/06 Bugzilla 744: EXPN did not work under TLS.
3231 Patch provided by Phil Pennock.
3233 NM/07 Bugzilla 769: Extraneous comma in usage fprintf
3234 Patch provided by Richard Godbee.
3236 NM/08 Fixed erroneous documentation references to smtp_notquit_acl to be
3237 acl_smtp_notquit, added index entry.
3239 NM/09 Bugzilla 787: Potential buffer overflow in string_format.
3240 Patch provided by Eugene Bujak.
3242 NM/10 Bugzilla 770: Problem on some platforms modifying the len parameter to
3243 accept(). Patch provided by Maxim Dounin.
3245 NM/11 Bugzilla 749: Preserve old behaviour of blanks comparing equal to zero.
3246 Patch provided by Phil Pennock.
3248 NM/12 Bugzilla 497: Correct behaviour of exiwhat when no config exists.
3250 NM/13 Bugzilla 590: Correct handling of Resent-Date headers.
3251 Patch provided by Brad "anomie" Jorsch.
3253 NM/14 Bugzilla 622: Added timeout setting to transport filter.
3254 Patch provided by Dean Brooks.
3256 TK/05 Add native DKIM support (does not depend on external libraries).
3258 NM/15 Bugzilla 854: Removed code that symlinks to pcre as its no longer useful.
3259 Patch provided by Graeme Fowler.
3261 NM/16 Bugzilla 851: Documentation example syntax fix.
3263 NM/17 Changed NOTICE file to remove references to embedded PCRE.
3265 NM/18 Bugzilla 894: Fix issue with very long lines including comments in
3268 NM/19 Bugzilla 745: TLS version reporting.
3269 Patch provided by Phil Pennock.
3271 NM/20 Bugzilla 167: bool: condition support.
3272 Patch provided by Phil Pennock.
3274 NM/21 Bugzilla 665: gnutls_compat_mode to allow compatibility with broken
3275 clients. Patch provided by Phil Pennock.
3277 NM/22 Bugzilla 607: prepend (not append) Resent-Message-ID and Resent-Date.
3278 Patch provided by Brad "anomie" Jorsch.
3280 NM/23 Bugzilla 687: Fix misparses in eximstats.
3281 Patch provided by Heiko Schlittermann.
3283 NM/24 Bugzilla 688: Fix exiwhat to handle log_selector = +pid.
3284 Patch provided by Heiko Schlittermann.
3286 NM/25 Bugzilla 727: Use transport mode as default mode for maildirsize file.
3287 plus update to original patch.
3289 NM/26 Bugzilla 799: Documentation correction for ratelimit.
3291 NM/27 Bugzilla 802: Improvements to local interface IP addr detection.
3292 Patch provided by David Brownlee.
3294 NM/28 Bugzilla 807: Improvements to LMTP delivery logging.
3296 NM/29 Bugzilla 862, 866, 875: Documentation bugfixes.
3298 NM/30 Bugzilla 888: TLS documentation bugfixes.
3300 NM/31 Bugzilla 896: Dovecot buffer overrun fix.
3302 NM/32 Bugzilla 889: Change all instances of "expr" in shell scripts to "expr --"
3303 Unlike the original bugzilla I have changed all shell scripts in src tree.
3305 NM/33 Bugzilla 898: Transport filter timeout fix.
3306 Patch by Todd Rinaldo.
3308 NM/34 Bugzilla 901: Fix sign/unsigned and UTF mismatches.
3309 Patch by Serge Demonchaux.
3311 NM/35 Bugzilla 39: Base64 decode bug fixes.
3312 Patch by Jakob Hirsch.
3314 NM/36 Bugzilla 909: Correct connect() call in dcc code.
3316 NM/37 Bugzilla 910: Correct issue with relaxed/simple handling.
3318 NM/38 Bugzilla 908: Removed NetBSD3 support as no longer needed.
3320 NM/39 Bugzilla 911: Fixed MakeLinks build script.
3326 TK/01 Add preliminary DKIM support. Currently requires a forked version of
3327 ALT-N's libdkim that I have put here:
3328 http://duncanthrax.net/exim-experimental/
3330 Note to Michael Haardt: I had to rename some vars in sieve.c. They
3331 were called 'true' and it seems that C99 defines that as a reserved
3332 keyword to be used with 'bool' variable types. That means you could
3333 not include C99-style headers which use bools without triggering
3334 build errors in sieve.c.
3336 NM/01 Bugzilla 592: --help option is handled incorrectly if exim is invoked
3337 as mailq or other aliases. Changed the --help handling significantly
3338 to do whats expected. exim_usage() emits usage/help information.
3340 SC/01 Added the -bylocaldomain option to eximstats.
3342 NM/02 Bugzilla 619: Defended against bad data coming back from gethostbyaddr.
3344 NM/03 Bugzilla 613: Documentation fix for acl_not_smtp.
3346 NM/04 Bugzilla 628: PCRE update to 7.4 (work done by John Hall).
3352 PH/01 Another patch from the Sieve maintainer.
3354 PH/02 When an IPv6 address is converted to a string for single-key lookup
3355 in an address list (e.g. for an item such as "net24-dbm;/net/works"),
3356 dots are used instead of colons so that keys in lsearch files need not
3357 contain colons. This was done some time before quoting was made available
3358 in lsearch files. However, iplsearch files do require colons in IPv6 keys
3359 (notated using the quote facility) so as to distinguish them from IPv4
3360 keys. This meant that lookups for IP addresses in host lists did not work
3361 for iplsearch lookups.
3363 This has been fixed by arranging for IPv6 addresses to be expressed with
3364 colons if the lookup type is iplsearch. This is not incompatible, because
3365 previously such lookups could never work.
3367 The situation is now rather anomalous, since one *can* have colons in
3368 ordinary lsearch keys. However, making the change in all cases is
3369 incompatible and would probably break a number of configurations.
3371 TK/01 Change PRVS address formatting scheme to reflect latests BATV draft
3374 MH/01 The "spam" ACL condition code contained a sscanf() call with a %s
3375 conversion specification without a maximum field width, thereby enabling
3376 a rogue spamd server to cause a buffer overflow. While nobody in their
3377 right mind would setup Exim to query an untrusted spamd server, an
3378 attacker that gains access to a server running spamd could potentially
3379 exploit this vulnerability to run arbitrary code as the Exim user.
3381 TK/02 Bugzilla 502: Apply patch to make the SPF-Received: header use
3382 $primary_hostname instead of what libspf2 thinks the hosts name is.
3384 MH/02 The dsearch lookup now uses lstat(2) instead of stat(2) to look for
3385 a directory entry by the name of the lookup key. Previously, if a
3386 symlink pointed to a non-existing file or a file in a directory that
3387 Exim lacked permissions to read, a lookup for a key matching that
3388 symlink would fail. Now it is enough that a matching directory entry
3389 exists, symlink or not. (Bugzilla 503.)
3391 PH/03 The body_linecount and body_zerocount variables are now exported in the
3394 PH/04 Added the $dnslist_matched variable.
3396 PH/05 Unset $tls_cipher and $tls_peerdn before making a connection as a client.
3397 This means they are set thereafter only if the connection becomes
3400 PH/06 Added the client_condition to authenticators so that some can be skipped
3401 by clients under certain conditions.
3403 PH/07 The error message for a badly-placed control=no_multiline_responses left
3404 "_responses" off the end of the name.
3406 PH/08 Added -Mvc to output a copy of a message in RFC 2822 format.
3408 PH/09 Tidied the code for creating ratelimiting keys, creating them explicitly
3409 (without spaces) instead of just copying the configuration text.
3411 PH/10 Added the /noupdate option to the ratelimit ACL condition.
3413 PH/11 Added $max_received_linelength.
3415 PH/12 Added +ignore_defer and +include_defer to host lists.
3417 PH/13 Installed PCRE version 7.2. This needed some changes because of the new
3418 way in which PCRE > 7.0 is built.
3420 PH/14 Implemented queue_only_load_latch.
3422 PH/15 Removed an incorrect (int) cast when reading the value of SIZE in a
3423 MAIL command. The effect was to mangle the value on 64-bit systems.
3425 PH/16 Another patch from the Sieve maintainer.
3427 PH/17 Added the NOTQUIT ACL, based on a patch from Ted Cooper.
3429 PH/18 If a system quota error occurred while trying to create the file for
3430 a maildir delivery, the message "Mailbox is full" was not appended to the
3431 bounce if the delivery eventually timed out. Change 4.67/27 below applied
3432 only to a quota excession during the actual writing of the file.
3434 PH/19 It seems that peer DN values may contain newlines (and other non-printing
3435 characters?) which causes problems in log lines. The DN values are now
3436 passed through string_printing() before being added to log lines.
3438 PH/20 Added the "servers=" facility to MySQL and PostgreSQL lookups. (Oracle
3439 and InterBase are left for another time.)
3441 PH/21 Added message_body_newlines option.
3443 PH/22 Guard against possible overflow in moan_check_errorcopy().
3445 PH/23 POSIX allows open() to be a macro; guard against that.
3447 PH/24 If the recipient of an error message contained an @ in the local part
3448 (suitably quoted, of course), incorrect values were put in $domain and
3449 $local_part during the evaluation of errors_copy.
3455 MH/01 Fix for bug #448, segfault in Dovecot authenticator when interface_address
3456 is unset (happens when testing with -bh and -oMi isn't used). Thanks to
3459 PH/01 Added a new log selector smtp_no_mail, to log SMTP sessions that do not
3460 issue a MAIL command.
3462 PH/02 In an ACL statement such as
3464 deny dnslists = X!=127.0.0.2 : X=127.0.0.2
3466 if a client was not listed at all, or was listed with a value other than
3467 127.0.0.2, in the X list, but was listed with 127.0.0.2 in the Y list,
3468 the condition was not true (as it should be), so access was not denied.
3469 The bug was that the ! inversion was incorrectly passed on to the second
3470 item. This has been fixed.
3472 PH/03 Added additional dnslists conditions == and =& which are different from
3473 = and & when the dns lookup returns more than one IP address.
3475 PH/04 Added gnutls_require_{kx,mac,protocols} to give more control over the
3476 cipher suites used by GnuTLS. These options are ignored by OpenSSL.
3478 PH/05 After discussion on the list, added a compile time option ENABLE_DISABLE_
3479 FSYNC, which compiles an option called disable_fsync that allows for
3480 bypassing fsync(). The documentation is heavily laced with warnings.
3482 SC/01 Updated eximstats to collate all SpamAssassin rejects into one bucket.
3484 PH/06 Some tidies to the infrastructure of the Test Suite that is concerned
3485 with the auxiliary C programs that it uses: (1) Arrange for BIND_8_COMPAT
3486 to be defined when compiling on OSX (Darwin); (2) Tidies to the Makefile,
3487 including adding "make clean"; (3) Added -fPIC when compiling the test
3488 dynamically loaded module, to get rid of a warning.
3490 MH/02 Fix for bug #451, causing paniclog entries to be written if a bounce
3491 message fails, move_frozen_messages = true and ignore_bounce_errors_after
3492 = 0s. The bug is otherwise harmless.
3494 PH/07 There was a bug in the dovecot authenticator such that the value of
3495 $auth1 could be overwritten, and so not correctly preserved, after a
3496 successful authentication. This usually meant that the value preserved by
3497 the server_setid option was incorrect.
3499 PH/08 Added $smtp_count_at_connection_start, deliberately with a long name.
3501 PH/09 Installed PCRE release 7.0.
3503 PH/10 The acl_not_smtp_start ACL was, contrary to the documentation, not being
3504 run for batched SMTP input. It is now run at the start of every message
3505 in the batch. While fixing this I discovered that the process information
3506 (output by running exiwhat) was not always getting set for -bs and -bS
3507 input. This is fixed, and it now also says "batched" for BSMTP.
3509 PH/11 Added control=no_pipelining.
3511 PH/12 Added $sending_ip_address and $sending_port (mostly Magnus Holmgren's
3512 patch, slightly modified), and move the expansion of helo_data till after
3513 the connection is made in the smtp transport (so it can use these
3516 PH/13 Added ${rfc2047d: to decoded RFC 2047 strings.
3518 PH/14 Added log_selector = +pid.
3520 PH/15 Flush SMTP output before delaying, unless control=no_delay_flush is set.
3522 PH/16 Add ${if forany and ${if forall.
3524 PH/17 Added dsn_from option to vary the From: line in DSNs.
3526 PH/18 Flush SMTP output before performing a callout, unless control =
3527 no_callout_flush is set.
3529 PH/19 Change 4.64/PH/36 introduced a bug: when address_retry_include_sender
3530 was true (the default) a successful delivery failed to delete the retry
3531 item, thus causing premature timeout of the address. The bug is now
3534 PH/20 Added hosts_avoid_pipelining to the smtp transport.
3536 PH/21 Long custom messages for fakedefer and fakereject are now split up
3537 into multiline responses in the same way that messages for "deny" and
3538 other ACL rejections are.
3540 PH/22 Applied Jori Hamalainen's speed-up changes and typo fixes to exigrep,
3541 with slight modification.
3543 PH/23 Applied sieve patches from the maintainer "tracking the latest notify
3544 draft, changing the syntax and factoring some duplicate code".
3546 PH/24 When the log selector "outgoing_port" was set, the port was shown as -1
3547 for deliveries of the second and subsequent messages over the same SMTP
3550 PH/25 Applied Magnus Holmgren's patch for ${addresses, ${map, ${filter, and
3551 ${reduce, with only minor "tidies".
3553 SC/02 Applied Daniel Tiefnig's patch to improve the '($parent) =' pattern match.
3555 PH/26 Added a "continue" ACL modifier that does nothing, for the benefit of its
3556 expansion side effects.
3558 PH/27 When a message times out after an over-quota error from an Exim-imposed
3559 quota, the bounce message says "mailbox is full". This message was not
3560 being given when it was a system quota that was exceeded. It now should
3563 MH/03 Made $recipients available in local_scan(). local_scan() already has
3564 better access to the recipient list through recipients_list[], but
3565 $recipients can be useful in postmaster-provided expansion strings.
3567 PH/28 The $smtp_command and $smtp_command_argument variables were not correct
3568 in the case of a MAIL command with additional options following the
3569 address, for example: MAIL FROM:<foo@bar> SIZE=1234. The option settings
3570 were accidentally chopped off.
3572 PH/29 SMTP synchronization checks are implemented when a command is read -
3573 there is a check that no more input is waiting when there shouldn't be
3574 any. However, for some commands, a delay in an ACL can mean that it is
3575 some time before the response is written. In this time, more input might
3576 arrive, invalidly. So now there are extra checks after an ACL has run for
3577 HELO/EHLO and after the predata ACL, and likewise for MAIL and RCPT when
3578 pipelining has not been advertised.
3580 PH/30 MH's patch to allow iscntrl() characters to be list separators.
3582 PH/31 Unlike :fail:, a custom message specified with :defer: was not being
3583 returned in the SMTP response when smtp_return_error_details was false.
3584 This has been fixed.
3586 PH/32 Change the Dovecot authenticator to use read() and write() on the socket
3587 instead of the C I/O that was originally supplied, because problems were
3588 reported on Solaris.
3590 PH/33 Compile failed with OpenSSL 0.9.8e. This was due to a coding error in
3591 Exim which did not show up earlier: it was assuming that a call to
3592 SSL_CTX_set_info_callback() might give an error value. In fact, there is
3593 no error. In previous releases of OpenSSL, SSL_CTX_set_info_callback()
3594 was a macro that became an assignment, so it seemed to work. This has
3595 changed to a proper function call with a void return, hence the compile
3596 error. Exim's code has been fixed.
3598 PH/34 Change HDA_SIZE in oracle.c from 256 to 512. This is needed for 64-bit
3601 PH/35 Applied a patch from the Sieve maintainer which fixes a bug in "notify".
3603 PH/36 Applied John Jetmore's patch to add -v functionality to exigrep.
3605 PH/37 If a message is not accepted after it has had an id assigned (e.g.
3606 because it turns out to be too big or there is a timeout) there is no
3607 "Completed" line in the log. When some messages of this type were
3608 selected by exigrep, they were listed as "not completed". Others were
3609 picked up by some special patterns. I have improved the selection
3610 criteria to be more general.
3612 PH/38 The host_find_failed option in the manualroute router can now be set
3613 to "ignore", to completely ignore a host whose IP address cannot be
3614 found. If all hosts are ignored, the behaviour is controlled by the new
3615 host_all_ignored option.
3617 PH/39 In a list of hosts for manualroute, if one item (either because of multi-
3618 homing or because of multiple MX records with /mx) generated more than
3619 one IP address, and the following item turned out to be the local host,
3620 all the secondary addresses of the first item were incorrectly removed
3621 from the list, along with the local host and any following hosts (which
3622 is what is supposed to happen).
3624 PH/40 When Exim receives a message, it writes the login name, uid, and gid of
3625 whoever called Exim into the -H file. In the case of the daemon it was
3626 behaving confusingly. When first started, it used values for whoever
3627 started the daemon, but after a SIGHUP it used the Exim user (because it
3628 calls itself on a restart). I have changed the code so that it now always
3631 PH/41 (Following a suggestion from Tony Finch) If all the RCPT commands in a
3632 message are rejected with the same error (e.g. no authentication or bad
3633 sender address), and a DATA command is nevertheless sent (as can happen
3634 with PIPELINING or a stupid MUA), the error message that was given to the
3635 RCPT commands is included in the rejection of the DATA command. This is
3636 intended to be helpful for MUAs that show only the final error to their
3639 PH/42 Another patch from the Sieve maintainer.
3641 SC/02 Eximstats - Differentiate between permanent and temporary rejects.
3642 Eximstats - Fixed some broken HTML links and added missing column headers
3644 Eximstats - Fixed Grand Total Summary Domains, Edomains, and Email
3645 columns for Rejects, Temp Rejects, Ham, and Spam rows.
3647 SC/03 Eximstats - V1.58 Fix to get <> and blackhole to show in edomain tables.
3649 PH/43 Yet another patch from the Sieve maintainer.
3651 PH/44 I found a way to check for a TCP/IP connection going away before sending
3652 the response to the final '.' that terminates a message, but only in the
3653 case where the client has not sent further data following the '.'
3654 (unfortunately, this is allowed). However, in many cases there won't be
3655 any further data because there won't be any more messages to send. A call
3656 to select() can be used: if it shows that the input is "ready", there is
3657 either input waiting, or the socket has been closed. An attempt to read
3658 the next input character can distinguish the two cases. Previously, Exim
3659 would have sent an OK response which the client would never have see.
3660 This could lead to message repetition. This fix should cure that, at
3661 least in a lot of common cases.
3663 PH/45 Do not advertise STARTTLS in response to HELP unless it would be
3664 advertised in response to EHLO.
3670 PH/01 Two more bugs that were introduced by 4.64/PH/07, in addition to the one
3671 fixed by 4.65/MH/01 (is this a record?) are fixed:
3673 (i) An empty string was always treated as zero by the numeric comparison
3674 operators. This behaviour has been restored.
3676 (ii) It is documented that the numeric comparison operators always treat
3677 their arguments as decimal numbers. This was broken in that numbers
3678 starting with 0 were being interpreted as octal.
3680 While fixing these problems I realized that there was another issue that
3681 hadn't been noticed. Values of message_size_limit (both the global option
3682 and the transport option) were treated as octal if they started with 0.
3683 The documentation was vague. These values are now always treated as
3684 decimal, and I will make that clear in the documentation.
3690 TK/01 Disable default definition of HAVE_LINUX_SENDFILE. Clashes with
3691 Linux large file support (_FILE_OFFSET_BITS=64) on older glibc
3694 MH/01 Don't check that the operands of numeric comparison operators are
3695 integers when their expansion is in "skipping" mode (fixes bug
3696 introduced by 4.64-PH/07).
3698 PH/01 If a system filter or a router generates more than SHRT_MAX (32767)
3699 child addresses, Exim now panics and dies. Previously, because the count
3700 is held in a short int, deliveries were likely to be lost. As such a
3701 large number of recipients for a single message is ridiculous
3702 (performance will be very, very poor), I have chosen to impose a limit
3703 rather than extend the field.
3709 TK/01 Bugzilla #401. Fix DK spooling code so that it can overwrite a
3710 leftover -K file (the existence of which was triggered by #402).
3711 While we were at it, introduced process PID as part of the -K
3712 filename. This should rule out race conditions when creating
3715 TK/02 Bugzilla #402. Apply patch from Simon Arlott, speeding up DK signing
3716 processing considerably. Previous code took too long for large mails,
3717 triggering a timeout which in turn triggers #401.
3719 TK/03 Introduced HAVE_LINUX_SENDFILE to os.h-Linux. Currently only used
3720 in the DK code in transports.c. sendfile() is not really portable,
3721 hence the _LINUX specificness.
3723 TF/01 In the add_headers option to the mail command in an Exim filter,
3724 there was a bug that Exim would claim a syntax error in any
3725 header after the first one which had an odd number of characters
3728 PH/01 If a server that rejects MAIL FROM:<> was the target of a sender
3729 callout verification, Exim cached a "reject" for the entire domain. This
3730 is correct for most verifications, but it is not correct for a recipient
3731 verification with use_sender or use_postmaster set, because in that case
3732 the callout does not use MAIL FROM:<>. Exim now distinguishes the special
3733 case of MAIL FROM:<> rejection from other early rejections (e.g.
3734 rejection of HELO). When verifying a recipient using a non-null MAIL
3735 address, the cache is ignored if it shows MAIL FROM:<> rejection.
3736 Whatever the result of the callout, the value of the domain cache is
3737 left unchanged (for any other kind of callout, getting as far as trying
3738 RCPT means that the domain itself is ok).
3740 PH/02 Tidied a number of unused variable and signed/unsigned warnings that
3743 PH/03 On Solaris, an unexpectedly close socket (dropped connection) can
3744 manifest itself as EPIPE rather than ECONNECT. When tidying away a
3745 session, the daemon ignores ECONNECT errors and logs others; it now
3746 ignores EPIPE as well.
3748 PH/04 Applied Nico Erfurth's refactoring patch to tidy up mime.c
3749 (quoted-printable decoding).
3751 PH/05 Applied Nico Erfurth's refactoring patch to tidy up spool_mbox.c, and
3752 later the small subsequent patch to fix an introduced bug.
3754 PH/06 Installed the latest Cygwin Makefile from the Cygwin maintainer.
3756 PH/07 There was no check for overflow in expansions such as ${if >{1}{4096M}}.
3758 PH/08 An error is now given if message_size_limit is specified negative.
3760 PH/09 Applied and tidied up Jakob Hirsch's patch for allowing ACL variables
3761 to be given (somewhat) arbitrary names.
3763 JJ/01 exipick 20060919.0, allow for arbitrary acl_ variables introduced
3766 JJ/02 exipick 20060919.0, --show-vars args can now be regular expressions,
3767 miscellaneous code fixes
3769 PH/10 Added the log_reject_target ACL modifier to specify where to log
3772 PH/11 Callouts were setting the name used for EHLO/HELO from $smtp_active_
3773 hostname. This is wrong, because it relates to the incoming message (and
3774 probably the interface on which it is arriving) and not to the outgoing
3775 callout (which could be using a different interface). This has been
3776 changed to use the value of the helo_data option from the smtp transport
3777 instead - this is what is used when a message is actually being sent. If
3778 there is no remote transport (possible with a router that sets up host
3779 addresses), $smtp_active_hostname is used.
3781 PH/12 Installed Andrey Panin's patch to add a dovecot authenticator. Various
3782 tweaks were necessary in order to get it to work (see also 21 below):
3783 (a) The code assumed that strncpy() returns a negative number on buffer
3784 overflow, which isn't the case. Replaced with Exim's string_format()
3786 (b) There were several signed/unsigned issues. I just did the minimum
3787 hacking in of casts. There is scope for a larger refactoring.
3788 (c) The code used strcasecmp() which is not a standard C function.
3789 Replaced with Exim's strcmpic() function.
3790 (d) The code set only $1; it now sets $auth1 as well.
3791 (e) A simple test gave the error "authentication client didn't specify
3792 service in request". It would seem that Dovecot has changed its
3793 interface. Fortunately there's a specification; I followed it and
3794 changed what the client sends and it appears to be working now.
3796 PH/13 Added $message_headers_raw to provide the headers without RFC 2047
3799 PH/14 Corrected misleading output from -bv when -v was also used. Suppose the
3800 address A is aliased to B and C, where B exists and C does not. Without
3801 -v the output is "A verified" because verification stops after a
3802 successful redirection if more than one address is generated. However,
3803 with -v the child addresses are also verified. Exim was outputting "A
3804 failed to verify" and then showing the successful verification for C,
3805 with its parentage. It now outputs "B failed to verify", showing B's
3806 parentage before showing the successful verification of C.
3808 PH/15 Applied Michael Deutschmann's patch to allow DNS black list processing to
3809 look up a TXT record in a specific list after matching in a combined
3812 PH/16 It seems that the options setting for the resolver (RES_DEFNAMES and
3813 RES_DNSRCH) can affect the behaviour of gethostbyname() and friends when
3814 they consult the DNS. I had assumed they would set it the way they
3815 wanted; and indeed my experiments on Linux seem to show that in some
3816 cases they do (I could influence IPv6 lookups but not IPv4 lookups).
3817 To be on the safe side, however, I have now made the interface to
3818 host_find_byname() similar to host_find_bydns(), with an argument
3819 containing the DNS resolver options. The host_find_byname() function now
3820 sets these options at its start, just as host_find_bydns() does. The smtp
3821 transport options dns_qualify_single and dns_search_parents are passed to
3822 host_find_byname() when gethostbyname=TRUE in this transport. Other uses
3823 of host_find_byname() use the default settings of RES_DEFNAMES
3824 (qualify_single) but not RES_DNSRCH (search_parents).
3826 PH/17 Applied (a modified version of) Nico Erfurth's patch to make
3827 spool_read_header() do less string testing, by means of a preliminary
3828 switch on the second character of optional "-foo" lines. (This is
3829 overdue, caused by the large number of possibilities that now exist.
3830 Originally there were few.) While I was there, I also converted the
3831 str(n)cmp tests so they don't re-test the leading "-" and the first
3832 character, in the hope this might squeeze out yet more improvement.
3834 PH/18 Two problems with "group" syntax in header lines when verifying: (1) The
3835 flag allowing group syntax was set by the header_syntax check but not
3836 turned off, possible causing trouble later; (2) The flag was not being
3837 set at all for the header_verify test, causing "group"-style headers to
3838 be rejected. I have now set it in this case, and also caused header_
3839 verify to ignore an empty address taken from a group. While doing this, I
3840 came across some other cases where the code for allowing group syntax
3841 while scanning a header line wasn't quite right (mostly, not resetting
3842 the flag correctly in the right place). These bugs could have caused
3843 trouble for malformed header lines. I hope it is now all correct.
3845 PH/19 The functions {pwcheck,saslauthd}_verify_password() are always called
3846 with the "reply" argument non-NULL. The code, however (which originally
3847 came from elsewhere) had *some* tests for NULL when it wrote to *reply,
3848 but it didn't always do it. This confused somebody who was copying the
3849 code for some other use. I have removed all the tests.
3851 PH/20 It was discovered that the GnuTLS code had support for RSA_EXPORT, a
3852 feature that was used to support insecure browsers during the U.S. crypto
3853 embargo. It requires special client support, and Exim is probably the
3854 only MTA that supported it -- and would never use it because real RSA is
3855 always available. This code has been removed, because it had the bad
3856 effect of slowing Exim down by computing (never used) parameters for the
3857 RSA_EXPORT functionality.
3859 PH/21 On the advice of Timo Sirainen, added a check to the dovecot
3860 authenticator to fail if there's a tab character in the incoming data
3861 (there should never be unless someone is messing about, as it's supposed
3862 to be base64-encoded). Also added, on Timo's advice, the "secured" option
3863 if the connection is using TLS or if the remote IP is the same as the
3864 local IP, and the "valid-client-cert option" if a client certificate has
3867 PH/22 As suggested by Dennis Davis, added a server_condition option to *all*
3868 authenticators. This can be used for authorization after authentication
3869 succeeds. (In the case of plaintext, it servers for both authentication
3872 PH/23 Testing for tls_required and lost_connection in a retry rule didn't work
3873 if any retry times were supplied.
3875 PH/24 Exim crashed if verify=helo was activated during an incoming -bs
3876 connection, where there is no client IP address to check. In this
3877 situation, the verify now always succeeds.
3879 PH/25 Applied John Jetmore's -Mset patch.
3881 PH/26 Added -bem to be like -Mset, but loading a message from a file.
3883 PH/27 In a string expansion for a processed (not raw) header when multiple
3884 headers of the same name were present, leading whitespace was being
3885 removed from all of them, but trailing whitespace was being removed only
3886 from the last one. Now trailing whitespace is removed from each header
3887 before concatenation. Completely empty headers in a concatenation (as
3888 before) are ignored.
3890 PH/28 Fixed bug in backwards-compatibility feature of PH/09 (thanks to John
3891 Jetmore). It would have mis-read ACL variables from pre-4.61 spool files.
3893 PH/29 [Removed. This was a change that I later backed out, and forgot to
3894 correct the ChangeLog entry (that I had efficiently created) before
3895 committing the later change.]
3897 PH/30 Exim was sometimes attempting to deliver messages that had suffered
3898 address errors (4xx response to RCPT) over the same connection as other
3899 messages routed to the same hosts. Such deliveries are always "forced",
3900 so retry times are not inspected. This resulted in far too many retries
3901 for the affected addresses. The effect occurred only when there were more
3902 hosts than the hosts_max_try setting in the smtp transport when it had
3903 the 4xx errors. Those hosts that it had tried were not added to the list
3904 of hosts for which the message was waiting, so if all were tried, there
3905 was no problem. Two fixes have been applied:
3907 (i) If there are any address or message errors in an SMTP delivery, none
3908 of the hosts (tried or untried) are now added to the list of hosts
3909 for which the message is waiting, so the message should not be a
3910 candidate for sending over the same connection that was used for a
3911 successful delivery of some other message. This seems entirely
3912 reasonable: after all the message is NOT "waiting for some host".
3913 This is so "obvious" that I'm not sure why it wasn't done
3914 previously. Hope I haven't missed anything, but it can't do any
3915 harm, as the worst effect is to miss an optimization.
3917 (ii) If, despite (i), such a delivery is accidentally attempted, the
3918 routing retry time is respected, so at least it doesn't keep
3919 hammering the server.
3921 PH/31 Installed Andrew Findlay's patch to close the writing end of the socket
3922 in ${readsocket because some servers need this prod.
3924 PH/32 Added some extra debug output when updating a wait-xxx database.
3926 PH/33 The hint "could be header name not terminated by colon", which has been
3927 given for certain expansion errors for a long time, was not being given
3928 for the ${if def:h_colon_omitted{... case.
3930 PH/34 The spec says: "With one important exception, whenever a domain list is
3931 being scanned, $domain contains the subject domain." There was at least
3932 one case where this was not true.
3934 PH/35 The error "getsockname() failed: connection reset by peer" was being
3935 written to the panic log as well as the main log, but it isn't really
3936 panic-worthy as it just means the connection died rather early on. I have
3937 removed the panic log writing for the ECONNRESET error when getsockname()
3940 PH/36 After a 4xx response to a RCPT error, that address was delayed (in queue
3941 runs only) independently of the message's sender address. This meant
3942 that, if the 4xx error was in fact related to the sender, a different
3943 message to the same recipient with a different sender could confuse
3944 things. In particular, this can happen when sending to a greylisting
3945 server, but other circumstances could also provoke similar problems.
3946 I have changed the default so that the retry time for these errors is now
3947 based a combination of the sender and recipient addresses. This change
3948 can be overridden by setting address_retry_include_sender=false in the
3951 PH/37 For LMTP over TCP/IP (the smtp transport), error responses from the
3952 remote server are returned as part of bounce messages. This was not
3953 happening for LMTP over a pipe (the lmtp transport), but now it is the
3954 same for both kinds of LMTP.
3956 PH/38 Despite being documented as not happening, Exim was rewriting addresses
3957 in header lines that were in fact CNAMEs. This is no longer the case.
3959 PH/39 If -R or -S was given with -q<time>, the effect of -R or -S was ignored,
3960 and queue runs started by the daemon processed all messages. This has
3961 been fixed so that -R and -S can now usefully be given with -q<time>.
3963 PH/40 Import PCRE release 6.7 (fixes some bugs).
3965 PH/41 Add bitwise logical operations to eval (courtesy Brad Jorsch).
3967 PH/42 Give an error if -q is specified more than once.
3969 PH/43 Renamed the variables $interface_address and $interface_port as
3970 $received_ip_address and $received_port, to make it clear that these
3971 values apply to message reception, and not to the outgoing interface when
3972 a message is delivered. (The old names remain recognized, of course.)
3974 PH/44 There was no timeout on the connect() call when using a Unix domain
3975 socket in the ${readsocket expansion. There now is.
3977 PH/45 Applied a modified version of Brad Jorsch's patch to allow "message" to
3978 be meaningful with "accept".
3980 SC/01 Eximstats V1.43
3981 Bug fix for V1.42 with -h0 specified. Spotted by Chris Lear.
3983 SC/02 Eximstats V1.44
3984 Use a glob alias rather than an array ref in the generated
3985 parser. This improves both readability and performance.
3987 SC/03 Eximstats V1.45 (Marco Gaiarin / Steve Campbell)
3988 Collect SpamAssassin and rejection statistics.
3989 Don't display local sender or destination tables unless
3990 there is data to show.
3991 Added average volumes into the top table text output.
3993 SC/04 Eximstats V1.46
3994 Collect data on the number of addresses (recipients)
3995 as well as the number of messages.
3997 SC/05 Eximstats V1.47
3998 Added 'Message too big' to the list of mail rejection
3999 reasons (thanks to Marco Gaiarin).
4001 SC/06 Eximstats V1.48
4002 Mainlog lines which have GMT offsets and are too short to
4003 have a flag are now skipped.
4005 SC/07 Eximstats V1.49 (Alain Williams)
4006 Added the -emptyok flag.
4008 SC/08 Eximstats V1.50
4009 Fixes for obtaining the IP address from reject messages.
4011 JJ/03 exipick.20061117.2, made header handling as similar to exim as possible
4012 (added [br]h_ prefixes, implemented RFC2047 decoding. Fixed
4013 whitespace changes from 4.64-PH/27
4015 JJ/04 exipick.20061117.2, fixed format and added $message_headers_raw to
4018 JJ/05 exipick.20061117.2, bug fixes (error out sooner when invalid criteria
4019 are found, allow negative numbers in numeric criteria)
4021 JJ/06 exipick.20061117.2, added new $message_body_missing variable
4023 JJ/07 exipick.20061117.2, added $received_ip_address and $received_port
4024 to match changes made in 4.64-PH/43
4026 PH/46 Applied Jori Hamalainen's patch to add features to exiqsumm.
4028 PH/47 Put in an explicit test for a DNS lookup of an address record where the
4029 "domain" is actually an IP address, and force a failure. This locks out
4030 those revolvers/nameservers that support "A-for-A" lookups, in
4031 contravention of the specifications.
4033 PH/48 When a host name was looked up from an IP address, and the subsequent
4034 forward lookup of the name timed out, the host name was left in
4035 $sender_host_name, contrary to the specification.
4037 PH/49 Although default lookup types such as lsearch* or cdb*@ have always been
4038 restricted to single-key lookups, Exim was not diagnosing an error if
4039 * or *@ was used with a query-style lookup.
4041 PH/50 Increased the value of DH_BITS in tls-gnu.c from 768 to 1024.
4043 MH/01 local_scan ABI version incremented to 1.1. It should have been updated
4044 long ago, but noone interested enough thought of it. Let's just say that
4045 the "1.1" means that there are some new functions that weren't there at
4046 some point in the past.
4048 PH/51 Error processing for expansion failure of helo_data from an smtp
4049 transport during callout processing was broken.
4051 PH/52 Applied John Jetmore's patch to allow tls-on-connect and STARTTLS to be
4052 tested/used via the -bh/-bhc/-bs options.
4054 PH/53 Added missing "#include <time.h>" to pcre/pcretest.c (this was a PCRE
4055 bug, fixed in subsequent PCRE releases).
4057 PH/54 Applied Robert Bannocks' patch to avoid a problem with references that
4058 arises when using the Solaris LDAP libraries (but not with OpenLDAP).
4060 PH/55 Check for a ridiculously long file name in exim_dbmbuild.
4066 SC/01 Use a glob alias rather than an array ref in eximstats generated
4067 parser. This improves both readability and performance.
4069 SC/02 Collect SpamAssassin and rejection statistics in eximstats.
4070 Don't display local sender or destination tables in eximstats unless
4071 there is data to show.
4072 Added average volumes into the eximstats top table text output.
4074 SC/03 Collect data on the number of addresses (recipients) as well
4075 as the number of messages in eximstats.
4077 TF/01 Correct an error in the documentation for the redirect router. Exim
4078 does (usually) call initgroups() when daemonizing.
4080 TF/02 Call initgroups() when dropping privilege in exim.c, so that Exim runs
4081 with consistent privilege compared to when running as a daemon.
4083 TF/03 Note in the spec that $authenticated_id is not set for local
4084 submissions from trusted users.
4086 TF/04 The ratelimit per_rcpt option now works correctly in acl_not_smtp.
4087 Thanks to Dean Brooks <dean@iglou.com> for the patch.
4089 TF/05 Make it easier to get SMTP authentication and TLS/SSL support working
4090 by adding some example configuration directives to the default
4091 configuration file. A little bit of work is required to uncomment the
4092 directives and define how usernames and passwords are checked, but
4093 there is now a framework to start from.
4095 PH/01 Added #define LDAP_DEPRECATED 1 to ldap.c because some of the "old"
4096 functions that Exim currently uses aren't defined in ldap.h for OpenLDAP
4097 without this. I don't know how relevant this is to other LDAP libraries.
4099 PH/02 Add the verb name to the "unknown ACL verb" error.
4101 PH/03 Magnus Holmgren's patch for filter_prepend_home.
4103 PH/03 Fixed Bugzilla #101: macro definition between ACLs doesn't work.
4105 PH/04 Applied Magnus Holmgren's patch to fix Bugzilla #98: transport's home
4106 directory not expanded when it should be if an expanded home directory
4107 was set for the address (which is overridden by the transport).
4109 PH/05 Applied Alex Kiernan's patch to fix Bugzilla #99: a problem with
4112 PH/06 Added acl_not_smtp_start, based on Johannes Berg's patch, and set the
4113 bit to forbid control=suppress_local_fixups in the acl_not_smtp ACL,
4114 because it is too late at that time, and has no effect.
4116 PH/07 Changed ${quote_pgsql to quote ' as '' instead of \' because of a
4117 security issue with \' (bugzilla #107). I could not use the
4118 PQescapeStringConn() function, because it needs a PGconn value as one of
4121 PH/08 When testing addresses using -bt, indicate those final addresses that
4122 are duplicates that would not cause an additional delivery. At least one
4123 person was confused, thinking that -bt output corresponded to deliveries.
4124 (Suppressing duplicates isn't a good idea as you lose the information
4125 about possibly different redirections that led to the duplicates.)
4127 PH/09 Applied patch from Erik to use select() instead of poll() in spam.c on
4128 systems where poll() doesn't work, in particular OS X.
4130 PH/10 Added more information to debugging output for retry time not reached.
4132 PH/11 Applied patch from Arkadiusz Miskiewicz to apply a timeout to read
4133 operations in malware.c.
4135 PH/12 Applied patch from Magnus Holmgren to include the "h" tag in Domain Keys
4138 PH/13 If write_rejectlog was set false when logging was sent to syslog with
4139 syslog_duplication set false, log lines that would normally be written
4140 both the the main log and to the reject log were not written to syslog at
4143 PH/14 In the default configuration, change the use of "message" in ACL warn
4144 statements to "add_header".
4146 PH/15 Diagnose a filter syntax error for "seen", "unseen", or "noerror" if not
4147 not followed by a command (e.g. "seen endif").
4149 PH/16 Recognize SMTP codes at the start of "message" in ACLs and after :fail:
4150 and :defer: in a redirect router. Add forbid_smtp_code to suppress the
4153 PH/17 Added extra conditions to the default value of delay_warning_condition
4157 { !eq{$h_list-id:$h_list-post:$h_list-subscribe:}{} } \
4158 { match{$h_precedence:}{(?i)bulk|list|junk} } \
4159 { match{$h_auto-submitted:}{(?i)auto-generated|auto-replied} } \
4162 The Auto-Submitted: and various List- headers are standardised, whereas I
4163 don't think Precedence: ever was.
4165 PH/18 Refactored debugging code in route_finduser() to show more information,
4166 in particular, the error code if getpwnam() issues one.
4168 PH/19 Added PQsetClientEncoding(conn, "SQL_ASCII") to the pgsql code module.
4169 This is apparently needed in addition to the PH/07 change above to avoid
4170 any possible encoding problems.
4172 PH/20 Perl can change the locale. Exim was resetting it after a ${perl call,
4173 but not after initializing Perl.
4175 PH/21 Added a call to PQsetNoticeProcessor() to catch pgsql "notices" and
4176 output them only if debugging. By default they are written stderr,
4177 apparently, which is not desirable.
4179 PH/22 Added Alain Williams' LDAP patch to support setting REFERRALS=off on
4182 JJ/01 exipick: added --reverse (and -R synonym), --random, --size, --sort and
4185 JJ/02 exipick: rewrote --help documentation to hopefully make more clear.
4187 PH/23 Made -oMaa and -oMt work with -bh and -bs to pretend the connection is
4188 authenticated or an ident call has been made. Suppress the default
4189 values for $authenticated_id and $authenticated_sender (but permit -oMai
4190 and -oMas) when testing with -bh.
4192 PH/24 Re-jigged the order of the tests in the default configuration so that the
4193 tests for valid domains and recipients precede the DNS black list and CSA
4194 tests, on the grounds that those ones are more expensive.
4196 PH/25 Exim was not testing for a space following SMTP commands such as EHLO
4197 that require one. Thus, EHLORHUBARB was interpreted as a valid command.
4198 This bug exists in every version of Exim that I still have, right back to
4201 PH/26 (n)wildlsearch lookups are documented as being done case-insensitively.
4202 However, an attempt to turn on case-sensitivity in a regex key by
4203 including (?-i) didn't work because the subject string was already
4204 lowercased, and the effects were non-intuitive. It turns out that a
4205 one-line patch can be used to allow (?-i) to work as expected.
4211 TF/01 Fix the add_header change below (4.61 PH/55) which had a bug that (amongst
4212 other effects) broke the use of negated acl sub-conditions.
4214 PH/01 ${readsocket now supports Internet domain sockets (modified John Jetmore
4217 PH/02 When tcp-wrappers is called from Exim, it returns only "deny" or "allow".
4218 "Deny" causes Exim to reject the incoming connection with a 554 error.
4219 Unfortunately, if there is a major crisis, such as a disk failure,
4220 tcp-wrappers gives "deny", whereas what one would like would be some
4221 kind of temporary error. A kludge has been added to help with this.
4222 Before calling hosts_ctl(), errno is set zero. If the result is "deny", a
4223 554 error is used if errno is still zero or contains ENOENT (which occurs
4224 if either of the /etc/hosts.{allow,deny} files is missing). Otherwise, a
4227 PH/03 Add -lutil to the default FreeBSD LIBS setting.
4229 PH/04 Change PH/19 for 4.61 was too wide. It should not be applied to host
4230 errors. Otherwise a message that provokes a temporary error (when other
4231 messages do not) can cause a whole host to time out.
4233 PH/05 Batch deliveries by appendfile and pipe transports did not work when the
4234 addresses were routed directly to files or pipes from a redirect router.
4235 File deliveries just didn't batch; pipe deliveries might have suffered
4238 PH/06 A failure to get a lock for a hints database would erroneously always say
4239 "Failed to get write lock", even when it was really a read lock.
4241 PH/07 The appendfile transport was creating MBX lock files with a fixed mode
4242 of 0600. This has been changed to use the value of the lockfile_mode
4243 option (which defaults to 0600).
4245 PH/08 Applied small patch from the Sieve maintainer.
4247 PH/09 If maildir_quota_directory_regex was set to exclude (say) the .Trash
4248 folder from quota calculations, a direct delivery into this folder messed
4249 up the contents of the maildirsize file. This was because the regex was
4250 used only to exclude .Trash (or whatever) when the size of the mailbox
4251 was calculated. There was no check that a delivery was happening into an
4252 excluded directory. This bug has been fixed by ignoring all quota
4253 processing for deliveries into excluded directories.
4255 PH/10 Added the maildirfolder_create_regex option to appendfile.
4261 PH/01 The code for finding all the local interface addresses on a FreeBSD
4262 system running IPv6 was broken. This may well have applied to all BSD
4263 systems, as well as to others that have similar system calls. The broken
4264 code found IPv4 interfaces correctly, but gave incorrect values for the
4265 IPv6 interfaces. In particular, ::1 was not found. The effect in Exim was
4266 that it would not match correctly against @[] and not recognize the IPv6
4269 PH/02 The ipliteral router was not recognizing addresses of the form user@
4270 [ipv6:....] because it didn't know about the "ipv6:" prefix.
4272 PH/03 Added disable_ipv6.
4274 PH/04 Changed $reply_address to use the raw form of the headers instead of the
4275 decoded form, because it is most often used to construct To: headers
4276 lines in autoreplies, and the decoded form may well be syntactically
4277 invalid. However, $reply_address has leading white space removed, and all
4278 newlines turned into spaces so that the autoreply transport does not
4281 PH/05 If group was specified without a user on a router, and no group or user
4282 was specified on a transport, the group from the router was ignored.
4284 PH/06 Increased the number of ACL variables to 20 of each type, and arranged
4285 for visible compile-time settings that can be used to change these
4286 numbers, for those that want even more. Backwards compatibility with old
4287 spool files has been maintained. However, going back to a previous Exim
4288 release will lost any variables that are in spool files.
4290 PH/07 Two small changes when running in the test harness: increase delay when
4291 passing a TCP/IP connection to a new process, in case the original
4292 process has to generate a bounce, and remove special handling of
4293 127.0.0.2 (sic), which is no longer necessary.
4295 PH/08 Changed debug output of dbfn_open() flags from numbers to names, so as to
4296 be the same on different OS.
4298 PH/09 Moved a debug statement in filter processing to avoid a race problem when
4301 JJ/01 exipick: fixed bug where -b (brief) output option showed "Vars:"
4302 whether --show-vars was specified or not
4304 JJ/02 exipick: Added support for new ACL variable spool format introduced
4307 PH/10 Fixed another bug related to PH/04 above: if an incoming message had a
4308 syntactically invalid From: or Reply-to: line, and a filter used this to
4309 generate an autoreply, and therefore failed to obtain an address for the
4310 autoreply, Exim could try to deliver to a non-existent relative file
4311 name, causing unrelated and misleading errors. What now happens is that
4312 it logs this as a hard delivery error, but does not attempt to create a
4315 PH/11 The exinext utility has a -C option for testing purposes, but although
4316 the given file was scanned by exinext itself; it wasn't being passed on
4317 when Exim was called.
4319 PH/12 In the smtp transport, treat an explicit ECONNRESET error the same as
4320 an end-of-file indication when reading a command response.
4322 PH/13 Domain literals for IPv6 were not recognized unless IPv6 support was
4323 compiled. In many other places in Exim, IPv6 addresses are always
4324 recognized, so I have changed this. It also means that IPv4 domain
4325 literals of the form [IPV4:n.n.n.n] are now always recognized.
4327 PH/14 When a uid/gid is specified for the queryprogram router, it cannot be
4328 used if the router is not running as root, for example, when verifying at
4329 ACL time, or when using -bh. The debugging output from this situation was
4330 non-existent - all you got was a failure to exec. I have made two
4333 (a) Failures to set uid/gid, the current directory, or a process leader
4334 in a subprocess such as that created by queryprogram now generate
4335 suitable debugging output when -d is set.
4337 (b) The queryprogram router detects when it is not running as root,
4338 outputs suitable debugging information if -d is set, and then runs
4339 the subprocess without attempting to change uid/gid.
4341 PH/15 Minor change to Makefile for building test_host (undocumented testing
4344 PH/16 As discussed on the list in Nov/Dec: Exim no longer looks at the
4345 additional section of a DNS packet that returns MX or SRV records.
4346 Instead, it always explicitly searches for A/AAAA records. This avoids
4347 major problems that occur when a DNS server includes only records of one
4348 type (A or AAAA) in an MX/SRV packet. A byproduct of this change has
4349 fixed another bug: if SRV records were looked up and the corresponding
4350 address records were *not* found in the additional section, the port
4351 values from the SRV records were lost.
4353 PH/17 If a delivery to a pipe, file, or autoreply was deferred, Exim was not
4354 using the correct key (the original address) when searching the retry
4355 rules in order to find which one to use for generating the retry hint.
4357 PH/18 If quota_warn_message contains a From: header, Exim now refrains from
4358 adding the default one. Similarly, if it contains a Reply-To: header, the
4359 errors_reply_to option, if set, is not used.
4361 PH/19 When calculating a retry time, Exim used to measure the "time since
4362 failure" by looking at the "first failed" field in the retry record. Now
4363 it does not use this if it is later than than the arrival time of the
4364 message. Instead it uses the arrival time. This makes for better
4365 behaviour in cases where some deliveries succeed, thus re-setting the
4366 "first failed" field. An example is a quota failure for a huge message
4367 when small messages continue to be delivered. Without this change, the
4368 "time since failure" will always be short, possible causing more frequent
4369 delivery attempts for the huge message than are intended.
4370 [Note: This change was subsequently modified - see PH/04 for 4.62.]
4372 PH/20 Added $auth1, $auth2, $auth3 to contain authentication data (as well as
4373 $1, $2, $3) because the numerical variables can be reset during some
4374 expansion items (e.g. "match"), thereby losing the authentication data.
4376 PH/21 Make -bV show the size of off_t variables so that the test suite can
4377 decide whether to run tests for quotas > 2G.
4379 PH/22 Test the values given for quota, quota_filecount, quota_warn_threshold,
4380 mailbox_size, and mailbox_filecount in the appendfile transport. If a
4381 filecount value is greater than 2G or if a quota value is greater than 2G
4382 on a system where the size of off_t is not greater than 4, a panic error
4385 PH/23 When a malformed item such as 1.2.3/24 appears in a host list, it can
4386 never match. The debug and -bh output now contains an explicit error
4387 message indicating a malformed IPv4 address or mask.
4389 PH/24 An host item such as 1.2.3.4/abc was being treated as the IP address
4390 1.2.3.4 without a mask. Now it is not recognized as an IP address, and
4391 PH/23 above applies.
4393 PH/25 Do not write to syslog when running in the test harness. The only
4394 occasion when this arises is a failure to open the main or panic logs
4395 (for which there is an explicit test).
4397 PH/26 Added the /no_tell option to "control=freeze".
4399 PH/27 If a host name lookup failed very early in a connection, for example, if
4400 the IP address matched host_lookup and the reverse lookup yielded a name
4401 that did not have a forward lookup, an error message of the form "no IP
4402 address found for host xxx.xxx.xxx (during SMTP connection from NULL)"
4403 could be logged. Now it outputs the IP address instead of "NULL".
4405 PH/28 An enabling patch from MH: add new function child_open_exim2() which
4406 allows the sender and the authenticated sender to be set when
4407 submitting a message from within Exim. Since child_open_exim() is
4408 documented for local_scan(), the new function should be too.
4410 PH/29 In GnuTLS, a forced expansion failure for tls_privatekey was not being
4411 ignored. In both GnuTLS and OpenSSL, an expansion of tls_privatekey that
4412 results in an empty string is now treated as unset.
4414 PH/30 Fix eximon buffer overflow bug (Bugzilla #73).
4416 PH/31 Added sender_verify_fail logging option.
4418 PH/32 In November 2003, the code in Exim that added an empty Bcc: header when
4419 needed by RFC 822 but not by RFC 2822 was commented out. I have now
4420 tidied the source and removed it altogether.
4422 PH/33 When a queue run was abandoned because the load average was too high, a
4423 log line was always written; now it is written only if the queue_run log
4424 selector is set. In addition, the log line for abandonment now contains
4425 information about the queue run such as the pid. This is always present
4426 in "start" and "stop" lines but was omitted from the "abandon" line.
4428 PH/34 Omit spaces between a header name and the colon in the error message that
4429 is given when verify = headers_syntax fails (if there are lots of them,
4430 the message gets confusing).
4432 PH/35 Change the default for dns_check_names_pattern to allow slashes within
4433 names, as there are now some PTR records that contain slashes. This check
4434 is only to protect against broken name servers that fall over on strange
4435 characters, so the fact that it applies to all lookups doesn't matter.
4437 PH/36 Now that the new test suite is complete, we can remove some of the
4438 special code in Exim that was needed for the old test suite. For example,
4439 sorting DNS records because real resolvers return them in an arbitrary
4440 order. The new test suite's fake resolver always returns records in the
4443 PH/37 When running in the test harness, use -odi for submitted messages (e.g.
4444 bounces) except when queue_only is set, to avoid logging races between
4445 the different processes.
4447 PH/38 Panic-die if .include specifies a non-absolute path.
4449 PH/39 A tweak to the "H" retry rule from its user.
4451 JJ/03 exipick: Removed parentheses from 'next' and 'last' calls that specified
4452 a label. They prevented compilation on older perls.
4454 JJ/04 exipick: Refactored code to prevent implicit split to @_ which caused
4455 a warning to be raised on newish perls.
4457 JJ/05 exipick: Fixed bug where -bpc always showed a count of all messages
4458 on queue. Changes to match documented behaviour of showing count of
4459 messages matching specified criteria.
4461 PH/40 Changed the default ident timeout from 30s to 5s.
4463 PH/41 Added support for the use of login_cap features, on those BSD systems
4464 that have them, for controlling the resources used by pipe deliveries.
4466 PH/42 The content-scanning code uses fopen() to create files in which to put
4467 message data. Previously it was not paying any attention to the mode of
4468 the files. Exim runs with umask(0) because the rest of the code creates
4469 files with open(), and sets the required mode explicitly. Thus, these
4470 files were ending up world-writeable. This was not a big issue, because,
4471 being within the spool directory, they were not world-accessible. I have
4472 created a function called modefopen, which takes an additional mode
4473 argument. It sets umask(777), creates the file, chmods it to the required
4474 mode, then resets the umask. All the relevant calls to fopen() in the
4475 content scanning code have been changed to use this function.
4477 PH/43 If retry_interval_max is set greater than 24 hours, it is quietly reset
4478 to 24 hours. This avoids potential overflow problems when processing G
4479 and H retry rules. I suspect nobody ever tinkers with this value.
4481 PH/44 Added STRIP_COMMAND=/usr/bin/strip to the FreeBSD Makefile.
4483 PH/45 When the plaintext authenticator is running as a client, the server's
4484 challenges are checked to ensure they are valid base64 strings. By
4485 default, the authentication attempt is cancelled if an invalid string is
4486 received. Setting client_ignore_invalid_base64 true ignores these errors.
4487 The decoded challenge strings are now placed in $auth1, $auth2, etc. as
4488 they are received. Thus, the responses can be made to depend on the
4489 challenges. If an invalid string is ignored, an empty string is placed in
4492 PH/46 Messages that are created by the autoreply transport now contains a
4493 References: header, in accordance with RFCs 2822 and 3834.
4495 PH/47 Added authenticated_sender_force to the smtp transport.
4497 PH/48 The ${prvs expansion was broken on systems where time_t was long long.
4499 PH/49 Installed latest patch from the Sieve maintainer.
4501 PH/50 When an Exim quota was set without a file count quota, and mailbox_size
4502 was also set, the appendfile transport was unnecessarily scanning a
4503 directory of message files (e.g. for maildir delivery) to find the count
4504 of files (along with the size), even though it did not need this
4505 information. It now does the scan only if it needs to find either the
4506 size of the count of files.
4508 PH/51 Added ${time_eval: to convert Exim time strings into seconds.
4510 PH/52 Two bugs concerned with error handling when the smtp transport is
4513 (i) Exim was not creating retry information for temporary errors given
4514 for individual recipients after the DATA command when the smtp transport
4515 was used in LMTP mode. This meant that they could be retried too
4516 frequently, and not timed out correctly.
4518 (ii) Exim was setting the flag that allows error details to be returned
4519 for LMTP errors on RCPT commands, but not for LMTP errors for individual
4520 recipients that were returned after the DATA command.
4522 PH/53 This is related to PH/52, but is more general: for any failing address,
4523 when detailed error information was permitted to be returned to the
4524 sender, but the error was temporary, then after the final timeout, only
4525 "retry timeout exceeded" was returned. Now it returns the full error as
4526 well as "retry timeout exceeded".
4528 PH/54 Added control=allow_auth_unadvertised, as it seems there are clients that
4529 do this, and (what is worse) MTAs that accept it.
4531 PH/55 Added the add_header modified to ACLs. The use of "message" with "warn"
4532 will now be deprecated.
4534 PH/56 New os.c-cygwin from the Cygwin maintainer.
4536 JJ/06 exipick: added --unsorted option to allow unsorted output in all output
4537 formats (previously only available in exim formats via -bpr, -bpru,
4538 and -bpra. Now also available in native and exiqgrep formats)
4540 JJ/07 exipick: added --freeze and --thaw options to allow faster interaction
4541 with very large, slow to parse queues
4543 JJ/08 exipick: added ! as generic prefix to negate any criteria format
4545 JJ/09 exipick: miscellaneous performance enhancements (~24% improvements)
4547 PH/57 Tidies in SMTP dialogue display in debug output: (i) It was not showing
4548 responses to authentication challenges, though it was showing the
4549 challenges; (ii) I've removed the CR characters from the debug output for
4552 PH/58 Allow for the insertion of a newline as well as a space when a string
4553 is turned into more than one encoded-word during RFC 2047 encoding. The
4554 Sieve code now uses this.
4556 PH/59 Added the following errors that can be detected in retry rules: mail_4xx,
4557 data_4xx, lost_connection, tls_required.
4559 PH/60 When a VRFY deferred or FAILED, the log message rather than the user
4560 message was being sent as an SMTP response.
4562 PH/61 Add -l and -k options to exicyclog.
4564 PH/62 When verifying, if an address was redirected to one new address, so that
4565 verification continued, and the new address failed or deferred after
4566 having set something in $address_data, the value of $address_data was not
4567 passed back to the ACL. This was different to the case when no
4568 redirection occurred. The value is now passed back in both cases.
4570 PH/63 Changed the macro HAVE_LOGIN_CAP (see PH/41 for this release above) to
4571 HAVE_SETCLASSRESOURCES because there are different APIs in use that all
4572 use login_cap.h, so on its own it isn't the distinguishing feature. The
4573 new name refers directly to the setclassresources() function.
4575 PH/65 Added configuration files for NetBSD3.
4577 PH/66 Updated OS/Makefile-HP-UX for gcc 4.1.0 with HP-UX 11.
4579 PH/67 Fixed minor infelicity in the sorting of addresses to ensure that IPv6
4580 is preferred over IPv4.
4582 PH/68 The bounce_return_message and bounce_return_body options were not being
4583 honoured for bounces generated during the reception of non-SMTP messages.
4584 In particular, this applied to messages rejected by the ACL. This bug has
4585 been fixed. However, if bounce_return_message is true and bounce_return_
4586 body is false, the headers that are returned for a non-SMTP message
4587 include only those that have been read before the error was detected.
4588 (In the case of an ACL rejection, they have all been read.)
4590 PH/69 The HTML version of the specification is now built in a directory called
4591 spec_html instead of spec.html, because the latter looks like a path with
4592 a MIME-type, and this confuses some software.
4594 PH/70 Catch two compiler warnings in sieve.c.
4596 PH/71 Fixed an obscure and subtle bug (thanks Alexander & Matthias). The
4597 function verify_get_ident() calls ip_connect() to connect a socket, but
4598 if the "connect()" function timed out, ip_connect() used to close the
4599 socket. However, verify_get_ident() also closes the socket later, and in
4600 between Exim writes to the log, which may get opened at this point. When
4601 the socket was closed in ip_connect(), the log could get the same file
4602 descriptor number as the socket. This naturally causes chaos. The fix is
4603 not to close the socket in ip_connect(); the socket should be closed by
4604 the function that creates it. There was only one place in the code where
4605 this was missing, in the iplookup router, which I don't think anybody now
4606 uses, but I've fixed it anyway.
4608 PH/72 Make dns_again_means_nonexist apply to lookups using gethostbyname() as
4609 well as to direct DNS lookups. Otherwise the handling of names in host
4610 lists is inconsistent and therefore confusing.
4616 PH/01 Two changes to the default runtime configuration:
4618 (1) Move the checks for relay_from_hosts and authenticated clients from
4619 after to before the (commented out) DNS black list checks.
4621 (2) Add control=submission to the relay_from_hosts and authenticated
4622 clients checks, on the grounds that messages accepted by these
4623 statements are most likely to be submissions.
4625 PH/02 Several tidies to the handling of ${prvs and ${prvscheck:
4627 (1) Generate an error if the third argument for the ${prvs expansion is
4630 (2) Treat a missing third argument of ${prvscheck as if it were an empty
4633 (3) Reset the variables that are obtained from the first argument of
4634 ${prvscheck and used in the second argument before leaving the code,
4635 because their memory is reclaimed, so using them afterwards may do
4638 (4) Tidy up the code for expanding the arguments of ${prvscheck one by
4639 one (it's much easier than Tom thought :-).
4641 (5) Because of (4), we can now allow for the use of $prvscheck_result
4642 inside the third argument.
4644 PH/03 For some reason, the default setting of PATH when running a command from
4645 a pipe transport was just "/usr/bin". I have changed it to
4648 PH/04 SUPPORT_TRANSLATE_IP_ADDRESS and MOVE_FROZEN_MESSAGES did not cause
4649 anything to be listed in the output from -bV.
4651 PH/05 When a filter generated an autoreply, the entire To: header line was
4652 quoted in the delivery log line, like this:
4654 => >A.N.Other <ano@some.domain> <original@ddress> ...
4656 This has been changed so that it extracts the operative address. There
4657 may be more than one such address. If so, they are comma-separated, like
4660 => >ano@some.domain,ona@other.domain <original@ddress> ...
4662 PH/06 When a client host used a correct literal IP address in a HELO or EHLO
4663 command, (for example, EHLO [1.2.3.4]) and the client's IP address was
4664 not being looked up in the rDNS to get a host name, Exim was showing the
4665 IP address twice in Received: lines, even though the IP addresses were
4666 identical. For example:
4668 Received: from [1.2.3.4] (helo=[1.2.3.4])
4670 However, if the real host name was known, it was omitting the HELO data
4671 if it matched the actual IP address. This has been tidied up so that it
4672 doesn't show the same IP address twice.
4674 PH/07 When both +timestamp and +memory debugging was on, the value given by
4675 $tod_xxx expansions could be wrong, because the tod_stamp() function was
4676 called by the debug printing, thereby overwriting the timestamp buffer.
4677 Debugging no longer uses the tod_stamp() function when +timestamp is set.
4679 PH/08 When the original message was included in an autoreply transport, it
4680 always said "this is a copy of the message, including all the headers",
4681 even if body_only or headers_only was set. It now gives an appropriate
4684 PH/09 Applied a patch from the Sieve maintainer which:
4686 o fixes some comments
4687 o adds the (disabled) notify extension core
4688 o adds some debug output for the result of if/elsif tests
4689 o points to the current vacation draft in the documentation
4690 and documents the missing references header update
4694 o fixes a bug in processing the envelope test (when testing
4695 multiple envelope elements, the last element determined the
4698 PH/10 Exim was violating RFC 3834 ("Recommendations for Automatic Responses to
4699 Electronic Mail") by including:
4701 Auto-submitted: auto-generated
4703 in the messages that it generates (bounce messages and others, such as
4704 warnings). In the case of bounce messages for non-SMTP messages, there was
4705 also a typo: it was using "Auto_submitted" (underscore instead of
4706 hyphen). Since every message generated by Exim is necessarily in response
4707 to another message, thes have all been changed to:
4709 Auto-Submitted: auto-replied
4711 in accordance with these statements in the RFC:
4713 The auto-replied keyword:
4715 - SHOULD be used on messages sent in direct response to another
4716 message by an automatic process,
4718 - MUST NOT be used on manually-generated messages,
4720 - MAY be used on Delivery Status Notifications (DSNs) and Message
4721 Disposition Notifications (MDNs),
4723 - MUST NOT be used on messages generated by automatic or periodic
4724 processes, except for messages which are automatic responses to
4727 PH/11 Added "${if def:sender_address {(envelope-from <$sender_address>)\n\t}}"
4728 to the default Received: header definition.
4730 PH/12 Added log selector acl_warn_skipped (default on).
4732 PH/13 After a successful wildlsearch lookup, discard the values of numeric
4733 variables because (a) they are in the wrong storage pool and (b) even if
4734 they were copied, it wouldn't work properly because of the caching.
4736 PH/14 Add check_rfc2047_length to disable enforcement of RFC 2047 length
4737 checking when decoding. Apparently there are clients that generate
4738 overlong encoded strings. Why am I not surprised?
4740 PH/15 If the first argument of "${if match_address" was not empty, but did not
4741 contain an "@" character, Exim crashed. Now it writes a panic log message
4742 and treats the condition as false.
4744 PH/16 In autoreply, treat an empty string for "once" the same as unset.
4746 PH/17 A further patch from the Sieve maintainer: "Introduce the new Sieve
4747 extension "envelope-auth". The code is finished and in agreement with
4748 other implementations, but there is no documentation so far and in fact,
4749 nobody wrote the draft yet. This extension is currently #undef'ed, thus
4750 not changing the active code.
4752 Print executed "if" and "elsif" statements when debugging is used. This
4753 helps a great deal to understand what a filter does.
4755 Document more things not specified clearly in RFC3028. I had all this
4756 sorted out, when out of a sudden new issues came to my mind. Oops."
4758 PH/18 Exim was not recognizing the "net-" search type prefix in match_ip lists
4761 PH/19 Exim expands the IPv6 address given to -bh to its full non-abbreviated
4762 canonical form (as documented). However, after a host name lookup from
4763 the IP address, check_host() was doing a simple string comparison with
4764 addresses acquired from the DNS when checking that the found name did
4765 have the original IP as one of its addresses. Since any found IPv6
4766 addresses are likely to be in abbreviated form, the comparison could
4767 fail. Luckily, there already exists a function for doing the comparison
4768 by converting both addresses to binary, so now that is used instead of
4769 the text comparison.
4771 PH/20 There was another similar case to PH/19, when a complete host name was
4772 given in a host list; looking up its IP address could give an abbreviated
4773 form, whereas the current host's name might or might not be abbreviated.
4774 The same fix has been applied.
4780 PH/01 The ${base62: operator adjusted itself to base 36 when BASE_62 was
4781 set to 36 (for Darwin and Cygwin), but the ${base62d: operator did not.
4784 PH/02 Two minor problems detected in Cygwin: the os.{c,h} files had lost */ on
4785 the CVS lines, and there was a missing #if HAVE_IPV6 in host.c.
4787 PH/03 Typo: missing ".o" in src/pcre/Makefile.
4789 PH/04 Tighten up "personal" tests: Instead of testing for any "List-"
4790 header line, restrict the check to what is listed in RFCs 2369 and 2929.
4791 Also, for "Auto-Submitted", treat anything other than "no" as
4792 non-personal, in accordance with RFC 3834. (Previously it treated
4793 anything starting "auto-" as non-personal.)
4795 TF/01 The control=submission/name=... option had a problem with syntax
4796 errors if the name included a slash character. The /name= option
4797 now slurps the rest of the string, so it can include any characters
4798 but it must come last in the list of options (after /sender_retain
4801 PH/05 Some modifications to the interface to the fake nameserver for the new
4809 TK/01 Added the "success_on_redirect" address verification option. See
4810 NewStuff for rationale and an example.
4812 PH/01 Added support for SQLite, basic code supplied by David Woodhouse.
4814 PH/02 Patch to exigrep to allow it to work on syslog lines.
4816 PH/03 When creating an mbox file for a virus/spam scan, use fseek() instead of
4817 fread() to skip over the body file's header line, because in Cygwin the
4818 header line is locked and is inaccessible.
4820 PH/04 Added $message_exim_id, ultimately to replace $message_id (they will both
4821 co-exist for some time) to make it clear that it is the Exim ID that is
4822 referenced, not the Message-ID: header line.
4824 PH/05 Replaced all Tom's calls to snprintf() with calls to the internal
4825 string_format() function, because snprintf() does not exist on all
4828 PH/06 The use of forbid_filter_existstest now also locks out the use of the
4829 ${stat: expansion item.
4831 PH/07 Changed "SMTP protocol violation: synchronization error" into "SMTP
4832 protocol synchronization error", to keep the pedants happy.
4834 PH/08 Arrange for USE_INET_NTOA_FIX to be set in config.h for AIX systems as
4835 well as for IRIX systems, when gcc is being used. See the host.c source
4838 PH/09 Installed latest Cygwin configuration files from the Cygwin maintainer.
4840 PH/10 Named domain lists were not working if used in a queue_smtp_domains
4843 PH/11 Added support for the IGNOREQUOTA extension to LMTP, both to the lmtp
4844 transport and to the smtp transport in LMTP mode.
4846 TK/02 Remove one case of BASE64 error detection FTTB (undocumented anyway).
4848 PH/12 There was a missing call to search_tidyup() before the fork() in rda.c to
4849 run a filter in a subprocess. This could lead to confusion in subsequent
4850 lookups in the parent process. There should also be a search_tidyup() at
4851 the end of the subprocess.
4853 PH/13 Previously, if "verify = helo" was set in an ACL, the condition was true
4854 only if the host matched helo_try_verify_hosts, which caused the
4855 verification to occur when the EHLO/HELO command was issued. The ACL just
4856 tested the remembered result. Now, if a previous verification attempt has
4857 not happened, "verify = helo" does it there and then.
4859 JJ/01 exipick: added $message_exim_id variable (see 4.53-PH/04)
4861 TK/03 Fix log output including CR from clamd.
4863 PH/14 A reference to $reply_address when Reply-to: was empty and From: did not
4864 exist provoked a memory error which could cause a segfault.
4866 PH/15 Installed PCRE 6.2
4868 PH/17 Defined BIND_8_COMPAT in the Darwin os.h file.
4870 PH/18 Reversed 4.52/PH/17 because the HP-UX user found it wasn't the cause
4871 of the problem. Specifically, suggested +O2 rather than +O1 for the
4874 PH/19 Added sqlite_lock_timeout option (David Woodhouse's patch).
4876 PH/20 If a delivery was routed to a non-standard port by means of an SRV
4877 record, the port was not correctly logged when the outgoing_port log
4878 selector was set (it logged the transort's default port).
4880 PH/21 Added support for host-specific ports to manualroute, queryprogram,
4881 fallback_hosts, and "hosts" in the smtp transport.
4883 PH/22 If the log selector "outgoing_port" is set, the port is now also given on
4884 host errors such as "Connection refused".
4886 PH/23 Applied a patch to fix problems with exim-4.52 while doing radius
4887 authentication with radiusclient 0.4.9:
4889 - Error returned from rc_read_config was caught wrongly
4890 - Username/password not passed on to radius server due to wrong length.
4892 The presumption is that some radiusclient API changes for 4.51/PH/17
4893 were not taken care of correctly. The code is still untested by me (my
4894 Linux distribution still has 0.3.2 of radiusclient), but it was
4895 contributed by a Radius user.
4897 PH/24 When doing a callout, the value of $domain wasn't set correctly when
4898 expanding the "port" option of the smtp transport.
4900 TK/04 MIME ACL: Fix buffer underrun that occurs when EOF condition is met
4901 while reading a MIME header. Thanks to Tom Hughes for a patch.
4903 PH/24 Include config.h inside local_scan.h so that configuration settings are
4906 PH/25 Make $smtp_command_argument available after all SMTP commands. This means
4907 that in an ACL for RCPT (for example), you can examine exactly what was
4910 PH/26 Exim was recognizing IPv6 addresses of the form [IPv6:....] in EHLO
4911 commands, but it was not correctly comparing the address with the actual
4912 client host address. Thus, it would show the EHLO address in Received:
4913 header lines when this was not necessary.
4915 PH/27 Added the % operator to ${eval:}.
4917 PH/28 Exim tries to create and chdir to its spool directory when it starts;
4918 it should be ignoring failures (because with -C, for example, it has lost
4919 privilege). It wasn't ignoring creation failures other than "already
4922 PH/29 Added "crypteq" to the list of supported features that Exim outputs when
4925 PH/30 Fixed (presumably very longstanding) bug in exim_dbmbuild: if it failed
4926 because an input line was too long, either on its own, or by virtue of
4927 too many continuations, the temporary file was not being removed, and the
4928 return code was incorrect.
4930 PH/31 Missing "BOOL" in function definition in filtertest.c.
4932 PH/32 Applied Sieve patches from the maintainer.
4934 TK/05 Domainkeys: Accomodate for a minor API change in libdomainkeys 0.67.
4936 PH/33 Added "verify = not_blind".
4938 PH/34 There are settings for CHOWN_COMMAND and MV_COMMAND that can be used in
4939 Local/Makefile (with some defaults set). These are used in built scripts
4940 such as exicyclog, but they have never been used in the exim_install
4941 script (though there are many overriding facilities there). I have
4942 arranged that the exim_install script now takes note of these two
4945 PH/35 Installed configuration files for Dragonfly.
4947 PH/36 When a locally submitted message by a trusted user did not contain a
4948 From: header, and the sender address was obtained from -f or from an SMTP
4949 MAIL command, and the trusted user did not use -F to supply a sender
4950 name, $originator_name was incorrectly used when constructing a From:
4951 header. Furthermore, $originator_name was used for submission mode
4952 messages from external hosts without From: headers in a similar way,
4953 which is clearly wrong.
4955 PH/37 Added control=suppress_local_fixups.
4957 PH/38 When log_selector = +received_sender was set, and the addition of the
4958 sender made the log line's construction buffer exactly full, or one byte
4959 less than full, an overflow happened when the terminating "\n" was
4962 PH/39 Added a new log selector, "unknown_in_list", which provokes a log entry
4963 when the result of a list match is failure because a DNS lookup failed.
4965 PH/40 RM_COMMAND is now used in the building process.
4967 PH/41 Added a "distclean" target to the top-level Makefile; it deletes all
4968 the "build-* directories that it finds.
4970 PH/42 (But a TF fix): In a domain list, Exim incorrectly matched @[] if the IP
4971 address in a domain literal was a prefix of an interface address.
4973 PH/43 (Again a TF fix): In the dnslookup router, do not apply widen_domains
4974 when verifying a sender address, unless rewrite_headers is false.
4976 PH/44 Wrote a long comment about why errors_to addresses are verified as
4977 recipients, not senders.
4979 TF/01 Add missing LIBS=-lm to OS/Makefile-OpenBSD which was overlooked when
4980 the ratelimit ACL was added.
4982 PH/45 Added $smtp_command for the full command (cf $smtp_command_argument).
4984 PH/46 Added extra information about PostgreSQL errors to the error string.
4986 PH/47 Added an interface to a fake DNS resolver for use by the new test suite,
4987 avoiding the need to install special zones in a real server. This is
4988 backwards compatible; if it can't find the fake resolver, it drops back.
4989 Thus, both old and new test suites can be run.
4991 TF/02 Added util/ratelimit.pl
4993 TF/03 Minor fix to the ratelimit code to improve its behaviour in case the
4994 clock is set back in time.
4996 TF/04 Fix the ratelimit support in exim_fixdb. Patch provided by Brian
4997 Candler <B.Candler@pobox.com>.
4999 TF/05 The fix for PH/43 was not completely correct; widen_domains is always
5000 OK for addresses that are the result of redirections.
5002 PH/48 A number of further additions for the benefit of the new test suite,
5003 including a fake gethostbyname() that interfaces to the fake DNS resolver
5006 TF/06 The fix for widen_domains has also been applied to qualify_single and
5007 search_parents which are the other dnslookup options that can cause
5010 PH/49 Michael Haardt's randomized retrying, but as a separate retry parameter
5013 PH/50 Make never_users, trusted_users, admin_groups, trusted_groups expandable.
5015 TF/07 Exim produced the error message "an SRV record indicated no SMTP
5016 service" if it encountered an MX record with an empty target hostname.
5017 The message is now "an MX or SRV record indicated no SMTP service".
5019 TF/08 Change PH/13 introduced the possibility that verify=helo may defer,
5020 if the DNS of the sending site is misconfigured. This is quite a
5021 common situation. This change restores the behaviour of treating a
5022 helo verification defer as a failure.
5024 PH/51 If self=fail was set on a router, the bounce message did not include the
5025 actual error message.
5031 TF/01 Added support for Client SMTP Authorization. See NewStuff for details.
5033 PH/01 When a transport filter timed out in a pipe delivery, and the pipe
5034 command itself ended in error, the underlying message about the transport
5035 filter timeout was being overwritten with the pipe command error. Now the
5036 underlying error message should be appended to the second error message.
5038 TK/01 Fix poll() being unavailable on Mac OSX 10.2.
5040 PH/02 Reduce the amount of output that "make" produces by default. Full output
5041 can still be requested.
5043 PH/03 The warning log line about a condition test deferring for a "warn" verb
5044 was being output only once per connection, rather than after each
5045 occurrence (because it was using the same function as for successful
5046 "warn" verbs). This seems wrong, so I have changed it.
5048 TF/02 Two buglets in acl.c which caused Exim to read a few bytes of memory that
5049 it should not have, which might have caused a crash in the right
5050 circumstances, but probably never did.
5052 PH/04 Installed a modified version of Tony Finch's patch to make submission
5053 mode fix the return path as well as the Sender: header line, and to
5054 add a /name= option so that you can make the user's friendly name appear
5057 TF/03 Added the control = fakedefer ACL modifier.
5059 TF/04 Added the ratelimit ACL condition. See NewStuff for details. Thanks to
5060 Mark Lowes for thorough testing.
5062 TK/02 Rewrote SPF support to work with libspf2 versions >1.2.0.
5064 TK/03 Merged latest SRS patch from Miles Wilton.
5066 PH/05 There's a shambles in IRIX6 - it defines EX_OK in unistd.h which conflicts
5067 with the definition in sysexits.h (which is #included earlier).
5068 Fortunately, Exim does not actually use EX_OK. The code used to try to
5069 preserve the sysexits.h value, by assuming that macro definitions were
5070 scanned for macro replacements. I have been disabused of this notion,
5071 so now the code just undefines EX_OK before #including unistd.h.
5073 PH/06 There is a timeout for writing blocks of data, set by, e.g. data_timeout
5074 in the smtp transport. When a block could not be written in a single
5075 write() function, the timeout was being re-applied to each part-write.
5076 This seems wrong - if the receiver was accepting one byte at a time it
5077 would take for ever. The timeout is now adjusted when this happens. It
5078 doesn't have to be particularly precise.
5080 TK/04 Added simple SPF lookup method in EXPERIMENTAL_SPF. See NewStuff for
5081 details. Thanks to Chris Webb <chris@arachsys.com> for the patch!
5083 PH/07 Added "fullpostmaster" verify option, which does a check to <postmaster>
5084 without a domain if the check to <postmaster@domain> fails.
5086 SC/01 Eximstats: added -xls and the ability to specify output files
5087 (patch written by Frank Heydlauf).
5089 SC/02 Eximstats: use FileHandles for outputting results.
5091 SC/03 Eximstats: allow any combination of xls, txt, and html output.
5093 SC/04 Eximstats: fixed display of large numbers with -nvr option
5095 SC/05 Eximstats: fixed merging of reports with empty tables.
5097 SC/06 Eximstats: added the -include_original_destination flag
5099 SC/07 Eximstats: removed tabs and trailing whitespace.
5101 TK/05 Malware: Improve on aveserver error handling. Patch from Alex Miller.
5103 TK/06 MBOX spool code: Add real "From " MBOX separator line
5104 so the .eml file is really in mbox format (even though
5105 most programs do not really care). Patch from Alex Miller.
5107 TK/07 MBOX spool code: Add X-Envelope-From: and X-Envelope-To: headers.
5108 The latter is generated from $received_to and is only set if the
5109 message has one envelope recipient. SA can use these headers,
5110 obviously out-of-the-box. Patch from Alex Miller.
5112 PH/08 The ${def test on a variable was returning false if the variable's
5113 value was "0", contrary to what the specification has always said!
5114 The result should be true unless the variable is empty.
5116 PH/09 The syntax error of a character other than { following "${if
5117 def:variable_name" (after optional whitespace) was not being diagnosed.
5118 An expansion such as ${if def:sender_ident:{xxx}{yyy}} in which an
5119 accidental colon was present, for example, could give incorrect results.
5121 PH/10 Tidied the code in a number of places where the st_size field of a stat()
5122 result is used (not including appendfile, where other changes are about
5125 PH/11 Upgraded appendfile so that quotas larger than 2G are now supported.
5126 This involved changing a lot of size variables from int to off_t. It
5127 should work with maildirs and everything.
5129 TK/08 Apply fix provided by Michael Haardt to prevent deadlock in case of
5130 spamd dying while we are connected to it.
5132 TF/05 Fixed a ${extract error message typo reported by Jeremy Harris
5135 PH/12 Applied Alex Kiernan's patch for the API change for the error callback
5136 function for BDB 4.3.
5138 PH/13 Changed auto_thaw such that it does not apply to bounce messages.
5140 PH/14 Imported PCRE 6.0; this was more than just a trivial operation because
5141 the sources for PCRE have been re-arranged and more files are now
5144 PH/15 The code I had for printing potentially long long variables in PH/11
5145 above was not the best (it lost precision). The length of off_t variables
5146 is now inspected at build time, and an appropriate printing format (%ld
5147 or %lld) is chosen and #defined by OFF_T_FMT. We also define LONGLONG_T
5148 to be "long long int" or "long int". This is needed for the internal
5149 formatting function string_vformat().
5151 PH/16 Applied Matthew Newton's patch to exicyclog: "If log_file_path is set in
5152 the configuration file to be ":syslog", then the script "guesses" where
5153 the logs files are, rather than using the compiled in default. In our
5154 case the guess is not the same as the compiled default, so the script
5155 suddenly stopped working when I started to use syslog. The patch checks
5156 to see if log_file_path is "". If so, it attempts to read it from exim
5157 with no configuration file to get the compiled in version, before it
5158 falls back to the previous guessing code."
5160 TK/09 Added "prvs" and "prvscheck" expansion items. These help a lot with
5161 implementing BATV in an Exim configuration. See NewStuff for the gory
5164 PH/17 Applied Michael Haardt's patch for HP-UX, affecting only the os.h and
5165 Makefile that are specific to HP-UX.
5167 PH/18 If the "use_postmaster" option was set for a recipient callout together
5168 with the "random" option, the postmaster address was used as the MAIL
5169 FROM address for the random test, but not for the subsequent recipient
5170 test. It is now used for both.
5172 PH/19 Applied Michael Haardt's patch to update Sieve to RFC3028bis. "The
5173 patch removes a few documentation additions to RFC 3028, because the
5174 latest draft now contains them. It adds the new en;ascii-case comparator
5175 and a new error check for 8bit text in MIME parts. Comparator and
5176 require names are now matched exactly. I enabled the subaddress
5177 extension, but it is not well tested yet (read: it works for me)."
5179 PH/20 Added macros for time_t as for off_t (see PH/15 above) and used them to
5180 rework some of the code of TK/09 above to avoid the hardwired use of
5181 "%lld" and "long long". Replaced the call to snprintf() with a call to
5184 PH/21 Added some other messages to those in 4.51/PH/42, namely "All relevant MX
5185 records point to non-existent hosts", "retry timeout exceeded", and
5186 "retry time not reached for any host after a long failure period".
5188 PH/22 Fixed some oversights/typos causing bugs when Exim is compiled with
5189 experimental DomainKeys support:
5191 (1) The filter variables $n0-$n9 and $sn0-$sn9 were broken.
5192 (2) On an error such as an illegally used "control", the wrong name for
5193 the control was given.
5195 These problems did NOT occur unless DomainKeys support was compiled.
5197 PH/23 Added daemon_startup_retries and daemon_startup_sleep.
5199 PH/24 Added ${if match_ip condition.
5201 PH/25 Put debug statements on either side of calls to EXIM_DBOPEN() for hints
5202 databases so that it will be absolutely obvious if a crash occurs in the
5203 DB library. This is a regular occurrence (often caused by mis-matched
5206 PH/26 Insert a lot of missing (void) casts for functions such as chown(),
5207 chmod(), fcntl(), sscanf(), and other functions from stdio.h. These were
5208 picked up on a user's system that detects such things. There doesn't seem
5209 to be a gcc warning option for this - only an attribute that has to be
5210 put on the function's prototype. It seems that in Fedora Core 4 they have
5211 set this on a number of new functions. No doubt there will be more in due
5214 PH/27 If a dnslookup or manualroute router is set with verify=only, it need not
5215 specify a transport. However, if an address that was verified by such a
5216 router was the subject of a callout, Exim crashed because it tried to
5217 read the rcpt_include_affixes from the non-existent transport. Now it
5218 just assumes that the setting of that option is false. This bug was
5219 introduced by 4.51/PH/31.
5221 PH/28 Changed -d+all to exclude +memory, because that information is very
5222 rarely of interest, but it makes the output a lot bigger. People tend to
5223 do -d+all out of habit.
5225 PH/29 Removed support for the Linux-libc5 build, as it is obsolete and the
5226 code in os-type was giving problems when libc.so lives in lib64, like on
5229 PH/30 Exim's DNS code uses the original T_xxx names for DNS record times. These
5230 aren't the modern standard, and it seems that some systems' include files
5231 don't always have them. Exim was already checking for some of the newer
5232 ones like T_AAAA, and defining it itself. I've added checks for all the
5233 record types that Exim uses.
5235 PH/31 When using GnuTLS, if the parameters cache file did not exist, Exim was
5236 not automatically generating a new one, as it is supposed to. This
5237 prevented TLS from working. If the file did exist, but contained invalid
5238 data, a new version was generated, as expected. It was only the case of a
5239 non-existent file that was broken.
5241 TK/10 Domainkeys: Fix a bug in verification that caused a crash in conjunction
5242 with a change in libdomainkeys > 0.64.
5244 TK/11 Domainkeys: Change the logic how the "testing" policy flag is retrieved
5245 from DNS. If the selector record carries the flag, it now has
5246 precedence over the domain-wide flag.
5248 TK/12 Cleared some compiler warnings related to SPF, SRS and DK code.
5250 PH/32 In mua_wrapper mode, if an smtp transport configuration error (such as
5251 the use of a port name that isn't defined in /etc/services) occurred, the
5252 message was deferred as in a normal delivery, and thus remained on the
5253 spool, instead of being failed because of the mua_wrapper setting. This
5254 is now fixed, and I tidied up some of the mua_wrapper messages at the
5257 SC/08 Eximstats: whilst parsing the mainlog(s), store information about
5258 the messages in a hash of arrays rather than using individual hashes.
5259 This is a bit cleaner and results in dramatic memory savings, albeit
5260 at a slight CPU cost.
5262 SC/09 Eximstats: added the -show_rt<list> and the -show_dt<list> flags
5263 as requested by Marc Sherman.
5265 SC/10 Eximstats: added histograms for user specified patterns as requested
5268 SC/11 Eximstats: v1.43 - bugfix for pattern histograms with -h0 specified.
5270 PH/33 Patch from the Cygwin maintainer to add "b" to all occurences of
5271 fopen() in the content-scanning modules that did not already have it.
5277 TK/01 Added Yahoo DomainKeys support via libdomainkeys. See
5278 doc/experimental-spec.txt for details. (http://domainkeys.sf.net)
5280 TK/02 Fix ACL "control" statement not being available in MIME ACL.
5282 TK/03 Fix ACL "regex" condition not being available in MIME ACL.
5284 PH/01 Installed a patch from the Sieve maintainer that allows -bf to be used
5285 to test Sieve filters that use "vacation".
5287 PH/02 Installed a slightly modified version of Nikos Mavrogiannopoulos' patch
5288 that changes the way the GnuTLS parameters are stored in the cache file.
5289 The new format can be generated externally. For backward compatibility,
5290 if the data in the cache doesn't make sense, Exim assumes it has read an
5291 old-format file, and it generates new data and writes a new file. This
5292 means that you can't go back to an older release without removing the
5295 PH/03 A redirect router that has both "unseen" and "one_time" set does not
5296 work if there are any delivery delays because "one_time" forces the
5297 parent to be marked "delivered", so its unseen clone is never tried
5298 again. For this reason, Exim now forbids the simultaneous setting of
5301 PH/04 Change 4.11/85 fixed an obscure bug concerned with addresses that are
5302 redirected to themselves ("homonym" addresses). Read the long ChangeLog
5303 entry if you want to know the details. The fix, however, neglected to
5304 consider the case when local delivery batching is involved. The test for
5305 "previously delivered" was not happening when checking to see if an
5306 address could be batched with a previous (undelivered) one; under
5307 certain circumstances this could lead to multiple deliveries to the same
5310 PH/05 Renamed the macro SOCKLEN_T as EXIM_SOCKLEN_T because AIX uses SOCKLEN_T
5311 in its include files, and this causes problems building Exim.
5313 PH/06 A number of "verify =" ACL conditions have no options (e.g. verify =
5314 header_syntax) but Exim was just ignoring anything given after a slash.
5315 In particular, this caused confusion with an attempt to use "verify =
5316 reverse_host_lookup/defer_ok". An error is now given when options are
5317 supplied for verify items that do not have them. (Maybe reverse_host_
5318 lookup should have a defer_ok option, but that's a different point.)
5320 PH/07 Increase the size of the buffer for incoming SMTP commands from 512 (as
5321 defined by RFC 821) to 2048, because there were problems with some AUTH
5322 commands, and RFC 1869 says the size should be increased for extended
5323 SMTP commands that take arguments.
5325 PH/08 Added ${dlfunc dynamically loaded function for expansion (code from Tony
5328 PH/09 Previously, an attempt to use ${perl when it wasn't compiled gave an
5329 "unknown" error; now it says that the functionality isn't in the binary.
5331 PH/10 Added a nasty fudge to try to recognize and flatten LDAP passwords in
5332 an address' error message when a string expansion fails (syntax or
5333 whatever). Otherwise the password may appear in the log. Following change
5334 PH/42 below, there is no longer a chance of it appearing in a bounce
5337 PH/11 Installed exipick version 20050225.0 from John Jetmore.
5339 PH/12 If the last host in a fallback_hosts list was multihomed, only the first
5340 of its addresses was ever tried. (Bugzilla bug #2.)
5342 PH/13 If "headers_add" in a transport didn't end in a newline, Exim printed
5343 the result incorrectly in the debug output. (It correctly added a newline
5344 to what was transported.)
5346 TF/01 Added $received_time.
5348 PH/14 Modified the default configuration to add an acl_smtp_data ACL, with
5349 commented out examples of how to interface to a virus scanner and to
5350 SpamAssassin. Also added commented examples of av_scanner and
5351 spamd_address settings.
5353 PH/15 Further to TK/02 and TK/03 above, tidied up the tables of what conditions
5354 and controls are allowed in which ACLs. There were a couple of minor
5355 errors. Some of the entries in the conditions table (which is a table of
5356 where they are NOT allowed) were getting very unwieldy; rewrote them as a
5357 negation of where the condition IS allowed.
5359 PH/16 Installed updated OS/os.c-cygwin from the Cygwin maintainer.
5361 PH/17 The API for radiusclient changed at release 0.4.0. Unfortunately, the
5362 header file does not have a version number, so I've had to invent a new
5363 value for RADIUS_LIB_TYPE, namely "RADIUSCLIENTNEW" to request the new
5364 API. The code is untested by me (my Linux distribution still has 0.3.2 of
5365 radiusclient), but it was contributed by a Radius user.
5367 PH/18 Installed Lars Mainka's patch for the support of CRL collections in
5368 files or directories, for OpenSSL.
5370 PH/19 When an Exim process that is running as root has to create an Exim log
5371 file, it does so in a subprocess that runs as exim:exim so as to get the
5372 ownership right at creation (otherwise, other Exim processes might see
5373 the file with the wrong ownership). There was no test for failure of this
5374 fork() call, which would lead to the process getting stuck as it waited
5375 for a non-existent subprocess. Forks do occasionally fail when resources
5376 run out. I reviewed all the other calls to fork(); they all seem to check
5379 PH/20 When checking for unexpected SMTP input at connect time (before writing
5380 the banner), Exim was not dealing correctly with a non-positive return
5381 from the read() function. If the client had disconnected by this time,
5382 the result was a log entry for a synchronization error with an empty
5383 string after "input=" when read() returned zero. If read() returned -1
5384 (an event I could not check), uninitialized data bytes were printed.
5385 There were reports of junk text (parts of files, etc) appearing after
5388 PH/21 Added acl_not_smtp_mime to allow for MIME scanning for non-SMTP messages.
5390 PH/22 Added support for macro redefinition, and (re)definition in between
5391 driver and ACL definitions.
5393 PH/23 The cyrus_sasl authenticator was expanding server_hostname, but then
5394 forgetting to use the resulting value; it was using the unexpanded value.
5396 PH/24 The cyrus_sasl authenticator was advertising mechanisms for which it
5397 hadn't been configured. The fix is from Juergen Kreileder, who
5398 understands it better than I do:
5400 "Here's what I see happening with three configured cyrus_sasl
5401 authenticators configured (plain, login, cram-md5):
5403 On startup auth_cyrus_sasl_init() gets called for each of these.
5404 This means three calls to sasl_listmech() without a specified mech_list.
5405 => SASL tests which mechs of all available mechs actually work
5406 => three warnings about OTP not working
5407 => the returned list contains: plain, login, cram-md5, digest-md5, ...
5409 With the patch, sasl_listmech() also gets called three times. But now
5410 SASL's mech_list option is set to the server_mech specified in the the
5411 authenticator. Or in other words, the answer from sasl_listmech()
5412 gets limited to just the mech you're testing for (which is different
5414 => the return list contains just 'plain' or 'login', 'cram-md5' or
5415 nothing depending on the value of ob->server_mech.
5417 I've just tested the patch: Authentication still works fine,
5418 unavailable mechs specified in the exim configuration are still
5419 caught, and the auth.log warnings about OTP are gone."
5421 PH/25 When debugging is enabled, the contents of the command line are added
5422 to the debugging output, even when log_selector=+arguments is not
5425 PH/26 Change scripts/os-type so that when "uname -s" returns just "GNU", the
5426 answer is "GNU", and only if the return is "GNU/something" is the answer
5429 PH/27 $acl_verify_message is now set immediately after the failure of a
5430 verification in an ACL, and so is available in subsequent modifiers. In
5431 particular, the message can be preserved by coding like this:
5433 warn !verify = sender
5434 set acl_m0 = $acl_verify_message
5436 Previously, $acl_verify_message was set only while expanding "message"
5437 and "log_message" when a very denied access.
5439 PH/28 Modified OS/os.c-Linux with
5441 -#ifndef OS_LOAD_AVERAGE
5442 +#if !defined(OS_LOAD_AVERAGE) && defined(__linux__)
5444 to make Exim compile on kfreebsd-gnu. (I'm totally confused about the
5445 nomenclature these days.)
5447 PH/29 Installed patch from the Sieve maintainer that adds the options
5448 sieve_useraddress and sieve_subaddress to the redirect router.
5450 PH/30 In these circumstances:
5451 . Two addresses routed to the same list of hosts;
5452 . First host does not offer TLS;
5453 . First host accepts first address;
5454 . First host gives temporary error to second address;
5455 . Second host offers TLS and a TLS session is established;
5456 . Second host accepts second address.
5457 Exim incorrectly logged both deliveries with the TLS parameters (cipher
5458 and peerdn, if requested) that were in fact used only for the second
5461 PH/31 When doing a callout as part of verifying an address, Exim was not paying
5462 attention to any local part prefix or suffix that was matched by the
5463 router that accepted the address. It now behaves in the same way as it
5464 does for delivery: the affixes are removed from the local part unless
5465 rcpt_include_affixes is set on the transport.
5467 PH/32 Add the sender address, as F=<...>, to the log line when logging a
5468 timeout during the DATA phase of an incoming message.
5470 PH/33 Sieve envelope tests were broken for match types other than :is. I have
5471 applied a patch sanctioned by the Sieve maintainer.
5473 PH/34 Change 4.50/80 broke Exim in that it could no longer handle cases where
5474 the uid or gid is negative. A case of a negative gid caused this to be
5475 noticed. The fix allows for either to be negative.
5477 PH/35 ACL_WHERE_MIME is now declared unconditionally, to avoid too much code
5478 clutter, but the tables that are indexed by ACL_WHERE_xxx values had been
5481 PH/36 The change PH/12 above was broken. Fixed it.
5483 PH/37 Exim used to check for duplicate addresses in the middle of routing, on
5484 the grounds that routing the same address twice would always produce the
5485 same answer. This might have been true once, but it is certainly no
5486 longer true now. Routing a child address may depend on the previous
5487 routing that produced that child. Some complicated redirection strategies
5488 went wrong when messages had multiple recipients, and made Exim's
5489 behaviour dependent on the order in which the addresses were given.
5491 I have moved the duplicate checking until after the routing is complete.
5492 Exim scans the addresses that are assigned to local and remote
5493 transports, and removes any duplicates. This means that more work will be
5494 done, as duplicates will always all be routed, but duplicates are
5495 presumably rare, so I don't expect this is of any significance.
5497 For deliveries to pipes, files, and autoreplies, the duplicate checking
5498 still happens during the routing process, since they are not going to be
5501 PH/38 Installed a patch from Ian Freislich, with the agreement of Tom Kistner.
5502 It corrects a timeout issue with spamd. This is Ian's comment: "The
5503 background is that sometimes spamd either never reads data from a
5504 connection it has accepted, or it never writes response data. The exiscan
5505 spam.[ch] uses a 3600 second timeout on spamd socket reads, further, it
5506 blindly assumes that writes won't block so it may never time out."
5508 PH/39 Allow G after quota size as well as K and M.
5510 PH/40 The value set for $authenticated_id in an authenticator may not contain
5511 binary zeroes or newlines because the value is written to log lines and
5512 to spool files. There was no check on this. Now the value is run through
5513 the string_printing() function so that such characters are converted to
5514 printable escape sequences.
5516 PH/41 $message_linecount is a new variable that contains the total number of
5517 lines in the message. Compare $body_linecount, which is the count for the
5520 PH/42 Exim no longer gives details of delivery errors for specific addresses in
5521 bounce and delay warning messages, except in certain special cases, which
5524 (a) An SMTP error message from a remote host;
5525 (b) A message specified in a :fail: redirection;
5526 (c) A message specified in a "fail" command in a system filter;
5527 (d) A message specified in a FAIL return from the queryprogram router;
5528 (e) A message specified by the cannot_route_message router option.
5530 In these cases only, Exim does include the error details in bounce and
5531 warning messages. There are also a few cases where bland messages such
5532 as "unrouteable address" or "local delivery error" are given.
5534 PH/43 $value is now also set for the "else" part of a ${run expansion.
5536 PH/44 Applied patch from the Sieve maintainer: "The vacation draft is still
5537 being worked on, but at least Exim now implements the latest version to
5540 PH/45 In a pipe transport, although a timeout while waiting for the pipe
5541 process to complete was treated as a delivery failure, a timeout while
5542 writing the message to the pipe was logged, but erroneously treated as a
5543 successful delivery. Such timeouts include transport filter timeouts. For
5544 consistency with the overall process timeout, these timeouts are now
5545 treated as errors, giving rise to delivery failures by default. However,
5546 there is now a new Boolean option for the pipe transport called
5547 timeout_defer, which, if set TRUE, converts the failures into defers for
5548 both kinds of timeout. A transport filter timeout is now identified in
5551 PH/46 The "scripts/Configure-config.h" script calls "make" at one point. On
5552 systems where "make" and "gmake" are different, calling "gmake" at top
5553 level broke things. I've arranged for the value of $(MAKE) to be passed
5554 from the Makefile to this script so that it can call the same version of
5558 A note about Exim versions 4.44 and 4.50
5559 ----------------------------------------
5561 Exim 4.50 was meant to be the next release after 4.43. It contains a lot of
5562 changes of various kinds. As a consequence, a big documentation update was
5563 needed. This delayed the release for rather longer than seemed good, especially
5564 in the light of a couple of (minor) security issues. Therefore, the changes
5565 that fixed bugs were backported into 4.43, to create a 4.44 maintenance
5566 release. So 4.44 and 4.50 are in effect two different branches that both start
5569 I have left the 4.50 change log unchanged; it contains all the changes since
5570 4.43. The change log for 4.44 is below; many of its items are identical to
5571 those for 4.50. This seems to be the most sensible way to preserve the
5572 historical information.
5578 1. Minor wording change to the doc/README.SIEVE file.
5580 2. Change 4.43/35 introduced a bug: if quota_filecount was set, the
5581 computation of the current number of files was incorrect.
5583 3. Closing a stable door: arrange to panic-die if setitimer() ever fails. The
5584 bug fixed in 4.43/37 would have been diagnosed quickly if this had been in
5587 4. Give more explanation in the error message when the command for a transport
5588 filter fails to execute.
5590 5. There are several places where Exim runs a non-Exim command in a
5591 subprocess. The SIGUSR1 signal should be disabled for these processes. This
5592 was being done only for the command run by the queryprogram router. It is
5593 now done for all such subprocesses. The other cases are: ${run, transport
5594 filters, and the commands run by the lmtp and pipe transports.
5596 6. Added CONFIGURE_GROUP build-time option.
5598 7. Some older OS have a limit of 256 on the maximum number of file
5599 descriptors. Exim was using setrlimit() to set 1000 as a large value
5600 unlikely to be exceeded. Change 4.43/17 caused a lot of logging on these
5601 systems. I've change it so that if it can't get 1000, it tries for 256.
5603 8. "control=submission" was allowed, but had no effect, in a DATA ACL. This
5604 was an oversight, and furthermore, ever since the addition of extra
5605 controls (e.g. 4.43/32), the checks on when to allow different forms of
5606 "control" were broken. There should now be diagnostics for all cases when a
5607 control that does not make sense is encountered.
5609 9. Added the /retain_sender option to "control=submission".
5611 10. $recipients is now available in the predata ACL (oversight).
5613 11. Tidy the search cache before the fork to do a delivery from a message
5614 received from the command line. Otherwise the child will trigger a lookup
5615 failure and thereby defer the delivery if it tries to use (for example) a
5616 cached ldap connection that the parent has called unbind on.
5618 12. If verify=recipient was followed by verify=sender in a RCPT ACL, the value
5619 of $address_data from the recipient verification was clobbered by the
5620 sender verification.
5622 13. The value of address_data from a sender verification is now available in
5623 $sender_address_data in subsequent conditions in the ACL statement.
5625 14. Added forbid_sieve_filter and forbid_exim_filter to the redirect router.
5627 15. Added a new option "connect=<time>" to callout options, to set a different
5630 16. If FIXED_NEVER_USERS was defined, but empty, Exim was assuming the uid 0
5631 was its contents. (It was OK if the option was not defined at all.)
5633 17. A "Completed" log line is now written for messages that are removed from
5634 the spool by the -Mrm option.
5636 18. New variables $sender_verify_failure and $recipient_verify_failure contain
5637 information about exactly what failed.
5639 19. Added -dd to debug only the daemon process.
5641 20. Incorporated Michael Haardt's patch to ldap.c for improving the way it
5642 handles timeouts, both on the server side and network timeouts. Renamed the
5643 CONNECT parameter as NETTIMEOUT (but kept the old name for compatibility).
5645 21. The rare case of EHLO->STARTTLS->HELO was setting the protocol to "smtp".
5646 It is now set to "smtps".
5648 22. $host_address is now set to the target address during the checking of
5649 ignore_target_hosts.
5651 23. When checking ignore_target_hosts for an ipliteral router, no host name was
5652 being passed; this would have caused $sender_host_name to have been used if
5653 matching the list had actually called for a host name (not very likely,
5654 since this list is usually IP addresses). A host name is now passed as
5657 24. Changed the calls that set up the SIGCHLD handler in the daemon to use the
5658 code that specifies a non-restarting handler (typically sigaction() in
5659 modern systems) in an attempt to fix a rare and obscure crash bug.
5661 25. Narrowed the window for a race in the daemon that could cause it to ignore
5662 SIGCHLD signals. This is not a major problem, because they are used only to
5663 wake it up if nothing else does.
5665 26. A malformed maildirsize file could cause Exim to calculate negative values
5666 for the mailbox size or file count. Odd effects could occur as a result.
5667 The maildirsize information is now recalculated if the size or filecount
5670 27. Added HAVE_SYS_STATVFS_H to the os.h file for Linux, as it has had this
5671 support for a long time. Removed HAVE_SYS_VFS_H.
5673 28. Installed the latest version of exipick from John Jetmore.
5675 29. In an address list, if the pattern was not a regular expression, an empty
5676 subject address (from a bounce message) matched only if the pattern was an
5677 empty string. Non-empty patterns were not even tested. This was the wrong
5678 because it is perfectly reasonable to use an empty address as part of a
5679 database query. An empty address is now tested by patterns that are
5680 lookups. However, all the other forms of pattern expect the subject to
5681 contain a local part and a domain, and therefore, for them, an empty
5682 address still always fails if the pattern is not itself empty.
5684 30. Exim went into a mad DNS loop when attempting to do a callout where the
5685 host was specified on an smtp transport, and looking it up yielded more
5686 than one IP address.
5688 31. Re-factored the code for checking spool and log partition space into a
5689 function that finds that data and another that does the check. The former
5690 is then used to implement four new variables: $spool_space, $log_space,
5691 $spool_inodes, and $log_inodes.
5693 32. The RFC2047 encoding function was originally intended for short strings
5694 such as real names; it was not keeping to the 75-character limit for
5695 encoded words that the RFC imposes. It now respects the limit, and
5696 generates multiple encoded words if necessary. To be on the safe side, I
5697 have increased the buffer size for the ${rfc2047: expansion operator from
5700 33. It is now permitted to omit both strings after an "if" condition; if the
5701 condition is true, the result is "true". As before, when the second string
5702 is omitted, a false condition yields an empty string. This makes it less
5703 cumbersome to write custom ACL and router conditions.
5705 34. Failure to deliver a bounce message always caused it to be frozen, even if
5706 there was an errors_to setting on the router. The errors_to setting is now
5709 35. If an IPv6 address is given for -bh or -bhc, it is now converted to the
5710 canonical form (fully expanded) before being placed in
5711 $sender_host_address.
5713 36. The table in the code that translates DNS record types into text (T_A to
5714 "A" for instance) was missing entries for NS and CNAME. It is just possible
5715 that this could have caused confusion if both these types were looked up
5716 for the same domain, because the text type is used as part of Exim's
5717 per-process caching. But the chance of anyone hitting this buglet seems
5720 37. The dnsdb lookup has been extended in a number of ways.
5722 (1) There is a new type, "zns", which walks up the domain tree until it
5723 finds some nameserver records. It should be used with care.
5725 (2) There is a new type, "mxh", which is like "mx" except that it returns
5726 just the host names, not the priorities.
5728 (3) It is now possible to give a list of domains (or IP addresses) to be
5729 looked up. The behaviour when one of the lookups defers can be
5730 controlled by a keyword.
5732 (4) It is now possible to specify the separator character for use when
5733 multiple records are returned.
5735 38. The dnslists ACL condition has been extended: it is now possible to supply
5736 a list of IP addresses and/or domains to be looked up in a particular DNS
5739 39. Added log_selector=+queue_time_overall.
5741 40. When running the queue in the test harness, wait just a tad after forking a
5742 delivery process, to get repeatability of debugging output.
5744 41. Include certificate and key file names in error message when GnuTLS fails
5745 to set them up, because the GnuTLS error message doesn't include the name
5746 of the failing file when there is a problem reading it.
5748 42. Allow both -bf and -bF in the same test run.
5750 43. Did the same fix as 41 above for OpenSSL, which had the same infelicity.
5752 44. The "Exiscan patch" is now merged into the mainline Exim source.
5754 45. Sometimes the final signoff response after QUIT could fail to get
5755 transmitted in the non-TLS case. Testing !tls_active instead of tls_active
5756 < 0 before doing a fflush(). This bug looks as though it goes back to the
5757 introduction of TLS in release 3.20, but "sometimes" must have been rare
5758 because the tests only now provoked it.
5760 46. Reset the locale to "C" after calling embedded Perl, in case it was changed
5761 (this can affect the format of dates).
5763 47. exim_tidydb, when checking for the continued existence of a message for
5764 which it has found a message-specific retry record, was not finding
5765 messages that were in split spool directories. Consequently, it was
5766 deleting retry records that should have stayed in existence.
5768 48. Steve fixed some bugs in eximstats.
5770 49. The SPA authentication driver was not abandoning authentication and moving
5771 on to the next authenticator when an expansion was forced to fail,
5772 contradicting the general specification for all authenticators. Instead it
5773 was generating a temporary error. It now behaves as specified.
5775 50. The default ordering of permitted cipher suites for GnuTLS was pessimal
5776 (the order specifies the preference for clients). The order is now AES256,
5777 AES128, 3DES, ARCFOUR128.
5779 51. Small patch to Sieve code - explicitly set From: when generating an
5782 52. Exim crashed if a remote delivery caused a very long error message to be
5783 recorded - for instance if somebody sent an entire SpamAssassin report back
5784 as a large number of 550 error lines. This bug was coincidentally fixed by
5785 increasing the size of one of Exim's internal buffers (big_buffer) that
5786 happened as part of the Exiscan merge. However, to be on the safe side, I
5787 have made the code more robust (and fixed the comments that describe what
5790 53. Now that there can be additional text after "Completed" in log lines (if
5791 the queue_time_overall log selector is set), a one-byte patch to exigrep
5792 was needed to allow it to recognize "Completed" as not the last thing in
5795 54. The LDAP lookup was not handling a return of LDAP_RES_SEARCH_REFERENCE. A
5796 patch that reportedly fixes this has been added. I am not expert enough to
5797 create a test for it. This is what the patch creator wrote:
5799 "I found a little strange behaviour of ldap code when working with
5800 Windows 2003 AD Domain, where users was placed in more than one
5801 Organization Units. When I tried to give exim partial DN, the exit code
5802 of ldap_search was unknown to exim because of LDAP_RES_SEARCH_REFERENCE.
5803 But simultaneously result of request was absolutely normal ldap result,
5804 so I produce this patch..."
5806 Later: it seems that not all versions of LDAP support LDAP_RES_SEARCH_
5807 REFERENCE, so I have modified the code to exclude the patch when that macro
5810 55. Some experimental protocols are using DNS PTR records for new purposes. The
5811 keys for these records are domain names, not reversed IP addresses. The
5812 dnsdb PTR lookup now tests whether its key is an IP address. If not, it
5813 leaves it alone. Component reversal etc. now happens only for IP addresses.
5816 56. Improve error message when ldap_search() fails in OpenLDAP or Solaris LDAP.
5818 57. Double the size of the debug message buffer (to 2048) so that more of very
5819 long debug lines gets shown.
5821 58. The exicyclog utility now does better if the number of log files to keep
5822 exceeds 99. In this case, it numbers them 001, 002 ... instead of 01, 02...
5824 59. Two changes related to the smtp_active_hostname option:
5826 (1) $smtp_active_hostname is now available as a variable.
5827 (2) The default for smtp_banner uses $smtp_active_hostname instead
5828 of $primary_hostname.
5830 60. The host_aton() function is supposed to be passed a string that is known
5831 to be a valid IP address. However, in the case of IPv6 addresses, it was
5832 not checking this. This is a hostage to fortune. Exim now panics and dies
5833 if the condition is not met. A case was found where this could be provoked
5834 from a dnsdb PTR lookup with an IPv6 address that had more than 8
5835 components; fortuitously, this particular loophole had already been fixed
5836 by change 4.50/55 above.
5838 If there are any other similar loopholes, the new check in host_aton()
5839 itself should stop them being exploited. The report I received stated that
5840 data on the command line could provoke the exploit when Exim was running as
5841 exim, but did not say which command line option was involved. All I could
5842 find was the use of -be with a bad dnsdb PTR lookup, and in that case it is
5843 running as the user.
5846 61. There was a buffer overflow vulnerability in the SPA authentication code
5847 (which came originally from the Samba project). I have added a test to the
5848 spa_base64_to_bits() function which I hope fixes it.
5851 62. Configuration update for GNU/Hurd and variations. Updated Makefile-GNU and
5852 os.h-GNU, and added configuration files for GNUkFreeBSD and GNUkNetBSD.
5854 63. The daemon start-up calls getloadavg() while still root for those OS that
5855 need the first call to be done as root, but it missed one case: when
5856 deliver_queue_load_max is set with deliver_drop_privilege. This is
5857 necessary for the benefit of the queue runner, because there is no re-exec
5858 when deliver_drop_privilege is set.
5860 64. A call to exiwhat cut short delays set up by "delay" modifiers in ACLs.
5861 This has been fixed.
5863 65. Caching of lookup data for "hosts =" ACL conditions, when a named host list
5864 was in use, was not putting the data itself into the right store pool;
5865 consequently, it could be overwritten for a subsequent message in the same
5866 SMTP connection. (Fix 4.40/11 dealt with the non-cache case, but overlooked
5869 66. Added hosts_max_try_hardlimit to the smtp transport, default 50.
5871 67. The string_is_ip_address() function returns 0, 4, or 6, for "no an IP
5872 address", "IPv4 address", and "IPv6 address", respectively. Some calls of
5873 the function were treating the return as a boolean value, which happened to
5874 work because 0=false and not-0=true, but is not correct code.
5876 68. The host_aton() function was not handling scoped IPv6 addresses (those
5877 with, for example, "%eth0" on the end) correctly.
5879 69. Fixed some compiler warnings in acl.c for the bitmaps specified with
5880 negated items (that is, ~something) in unsigned ints. Some compilers
5881 apparently mutter when there is no cast.
5883 70. If an address verification called from an ACL failed, and did not produce a
5884 user-specific message (i.e. there was only a "system" message), nothing was
5885 put in $acl_verify_message. In this situation, it now puts the system
5888 71. Change 4.23/11 added synchronization checking at the start of an SMTP
5889 session; change 4.31/43 added the unwanted input to the log line - except
5890 that it did not do this in the start of session case. It now does.
5892 72. After a timeout in a callout SMTP session, Exim still sent a QUIT command.
5893 This is wrong and can cause the other end to generate a synchronization
5894 error if it is another Exim or anything else that does the synchronization
5895 check. A QUIT command is no longer sent after a timeout.
5897 73. $host_lookup_deferred has been added, to make it easier to detect DEFERs
5898 during host lookups.
5900 74. The defer_ok option of callout verification was not working if it was used
5901 when verifying addresses in header lines, that is, for this case:
5903 verify = header_sender/callout=defer_ok
5905 75. A backgrounded daemon closed stdin/stdout/stderr on entry; this meant that
5906 those file descriptors could be used for SMTP connections. If anything
5907 wrote to stderr (the example that came up was "warn" in embedded Perl), it
5908 could be sent to the SMTP client, causing chaos. The daemon now opens
5909 stdin, stdout, and stderr to /dev/null when it puts itself into the
5912 76. Arrange for output from Perl's "warn" command to be written to Exim's main
5913 log by default. The user can override this with suitable Perl magic.
5915 77. The use of log_message on a "discard" ACL verb, which is supposed to add to
5916 the log message when discard triggers, was not working for the DATA ACL or
5917 for the non-SMTP ACL.
5919 78. Error message wording change in sieve.c.
5921 79. If smtp_accept_max_per_host was set, the number of connections could be
5922 restricted to fewer than expected, because the daemon was trying to set up
5923 a new connection before checking whether the processes handling previous
5924 connections had finished. The check for completed processes is now done
5925 earlier. On busy systems, this bug wouldn't be noticed because something
5926 else would have woken the daemon, and it would have reaped the completed
5929 80. If a message was submitted locally by a user whose login name contained one
5930 or more spaces (ugh!), the spool file that Exim wrote was not re-readable.
5931 It caused a spool format error. I have fixed the spool reading code. A
5932 related problem was that the "from" clause in the Received: line became
5933 illegal because of the space(s). It is now covered by ${quote_local_part.
5935 81. Included the latest eximstats from Steve (adds average sizes to HTML Top
5938 82. Updated OS/Makefile-AIX as per message from Mike Meredith.
5940 83. Patch from Sieve maintainer to fix unterminated string problem in
5941 "vacation" handling.
5943 84. Some minor changes to the Linux configuration files to help with other
5944 OS variants using glibc.
5946 85. One more patch for Sieve to update vacation handling to latest spec.
5949 ----------------------------------------------------
5950 See the note above about the 4.44 and 4.50 releases.
5951 ----------------------------------------------------
5957 1. Change 4.43/35 introduced a bug that caused file counts to be
5958 incorrectly computed when quota_filecount was set in an appendfile
5961 2. Closing a stable door: arrange to panic-die if setitimer() ever fails. The
5962 bug fixed in 4.43/37 would have been diagnosed quickly if this had been in
5965 3. Give more explanation in the error message when the command for a transport
5966 filter fails to execute.
5968 4. There are several places where Exim runs a non-Exim command in a
5969 subprocess. The SIGUSR1 signal should be disabled for these processes. This
5970 was being done only for the command run by the queryprogram router. It is
5971 now done for all such subprocesses. The other cases are: ${run, transport
5972 filters, and the commands run by the lmtp and pipe transports.
5974 5. Some older OS have a limit of 256 on the maximum number of file
5975 descriptors. Exim was using setrlimit() to set 1000 as a large value
5976 unlikely to be exceeded. Change 4.43/17 caused a lot of logging on these
5977 systems. I've change it so that if it can't get 1000, it tries for 256.
5979 6. "control=submission" was allowed, but had no effect, in a DATA ACL. This
5980 was an oversight, and furthermore, ever since the addition of extra
5981 controls (e.g. 4.43/32), the checks on when to allow different forms of
5982 "control" were broken. There should now be diagnostics for all cases when a
5983 control that does not make sense is encountered.
5985 7. $recipients is now available in the predata ACL (oversight).
5987 8. Tidy the search cache before the fork to do a delivery from a message
5988 received from the command line. Otherwise the child will trigger a lookup
5989 failure and thereby defer the delivery if it tries to use (for example) a
5990 cached ldap connection that the parent has called unbind on.
5992 9. If verify=recipient was followed by verify=sender in a RCPT ACL, the value
5993 of $address_data from the recipient verification was clobbered by the
5994 sender verification.
5996 10. If FIXED_NEVER_USERS was defined, but empty, Exim was assuming the uid 0
5997 was its contents. (It was OK if the option was not defined at all.)
5999 11. A "Completed" log line is now written for messages that are removed from
6000 the spool by the -Mrm option.
6002 12. $host_address is now set to the target address during the checking of
6003 ignore_target_hosts.
6005 13. When checking ignore_target_hosts for an ipliteral router, no host name was
6006 being passed; this would have caused $sender_host_name to have been used if
6007 matching the list had actually called for a host name (not very likely,
6008 since this list is usually IP addresses). A host name is now passed as
6011 14. Changed the calls that set up the SIGCHLD handler in the daemon to use the
6012 code that specifies a non-restarting handler (typically sigaction() in
6013 modern systems) in an attempt to fix a rare and obscure crash bug.
6015 15. Narrowed the window for a race in the daemon that could cause it to ignore
6016 SIGCHLD signals. This is not a major problem, because they are used only to
6017 wake it up if nothing else does.
6019 16. A malformed maildirsize file could cause Exim to calculate negative values
6020 for the mailbox size or file count. Odd effects could occur as a result.
6021 The maildirsize information is now recalculated if the size or filecount
6024 17. Added HAVE_SYS_STATVFS_H to the os.h file for Linux, as it has had this
6025 support for a long time. Removed HAVE_SYS_VFS_H.
6027 18. Updated exipick to current release from John Jetmore.
6029 19. Allow an empty sender to be matched against a lookup in an address list.
6030 Previously the only cases considered were a regular expression, or an
6033 20. Exim went into a mad DNS lookup loop when doing a callout where the
6034 host was specified on the transport, if the DNS lookup yielded more than
6037 21. The RFC2047 encoding function was originally intended for short strings
6038 such as real names; it was not keeping to the 75-character limit for
6039 encoded words that the RFC imposes. It now respects the limit, and
6040 generates multiple encoded words if necessary. To be on the safe side, I
6041 have increased the buffer size for the ${rfc2047: expansion operator from
6044 22. Failure to deliver a bounce message always caused it to be frozen, even if
6045 there was an errors_to setting on the router. The errors_to setting is now
6048 23. If an IPv6 address is given for -bh or -bhc, it is now converted to the
6049 canonical form (fully expanded) before being placed in
6050 $sender_host_address.
6052 24. Updated eximstats to version 1.33
6054 25. Include certificate and key file names in error message when GnuTLS fails
6055 to set them up, because the GnuTLS error message doesn't include the name
6056 of the failing file when there is a problem reading it.
6058 26. Expand error message when OpenSSL has problems setting up cert/key files.
6061 27. Reset the locale to "C" after calling embedded Perl, in case it was changed
6062 (this can affect the format of dates).
6064 28. exim_tidydb, when checking for the continued existence of a message for
6065 which it has found a message-specific retry record, was not finding
6066 messages that were in split spool directories. Consequently, it was
6067 deleting retry records that should have stayed in existence.
6069 29. eximstats updated to version 1.35
6070 1.34 - allow eximstats to parse syslog lines as well as mainlog lines
6071 1.35 - bugfix such that pie charts by volume are generated correctly
6073 30. The SPA authentication driver was not abandoning authentication and moving
6074 on to the next authenticator when an expansion was forced to fail,
6075 contradicting the general specification for all authenticators. Instead it
6076 was generating a temporary error. It now behaves as specified.
6078 31. The default ordering of permitted cipher suites for GnuTLS was pessimal
6079 (the order specifies the preference for clients). The order is now AES256,
6080 AES128, 3DES, ARCFOUR128.
6082 31. Small patch to Sieve code - explicitly set From: when generating an
6085 32. Exim crashed if a remote delivery caused a very long error message to be
6086 recorded - for instance if somebody sent an entire SpamAssassin report back
6087 as a large number of 550 error lines. This bug was coincidentally fixed by
6088 increasing the size of one of Exim's internal buffers (big_buffer) that
6089 happened as part of the Exiscan merge. However, to be on the safe side, I
6090 have made the code more robust (and fixed the comments that describe what
6093 33. Some experimental protocols are using DNS PTR records for new purposes. The
6094 keys for these records are domain names, not reversed IP addresses. The
6095 dnsdb PTR lookup now tests whether its key is an IP address. If not, it
6096 leaves it alone. Component reversal etc. now happens only for IP addresses.
6099 34. The host_aton() function is supposed to be passed a string that is known
6100 to be a valid IP address. However, in the case of IPv6 addresses, it was
6101 not checking this. This is a hostage to fortune. Exim now panics and dies
6102 if the condition is not met. A case was found where this could be provoked
6103 from a dnsdb PTR lookup with an IPv6 address that had more than 8
6104 components; fortuitously, this particular loophole had already been fixed
6105 by change 4.50/55 or 4.44/33 above.
6107 If there are any other similar loopholes, the new check in host_aton()
6108 itself should stop them being exploited. The report I received stated that
6109 data on the command line could provoke the exploit when Exim was running as
6110 exim, but did not say which command line option was involved. All I could
6111 find was the use of -be with a bad dnsdb PTR lookup, and in that case it is
6112 running as the user.
6115 35. There was a buffer overflow vulnerability in the SPA authentication code
6116 (which came originally from the Samba project). I have added a test to the
6117 spa_base64_to_bits() function which I hope fixes it.
6120 36. The daemon start-up calls getloadavg() while still root for those OS that
6121 need the first call to be done as root, but it missed one case: when
6122 deliver_queue_load_max is set with deliver_drop_privilege. This is
6123 necessary for the benefit of the queue runner, because there is no re-exec
6124 when deliver_drop_privilege is set.
6126 37. Caching of lookup data for "hosts =" ACL conditions, when a named host list
6127 was in use, was not putting the data itself into the right store pool;
6128 consequently, it could be overwritten for a subsequent message in the same
6129 SMTP connection. (Fix 4.40/11 dealt with the non-cache case, but overlooked
6132 38. Sometimes the final signoff response after QUIT could fail to get
6133 transmitted in the non-TLS case. Testing !tls_active instead of tls_active
6134 < 0 before doing a fflush(). This bug looks as though it goes back to the
6135 introduction of TLS in release 3.20, but "sometimes" must have been rare
6136 because the tests only now provoked it.
6142 1. Fixed a longstanding but relatively impotent bug: a long time ago, before
6143 PIPELINING, the function smtp_write_command() used to return TRUE or FALSE.
6144 Now it returns an integer. A number of calls were still expecting a T/F
6145 return. Fortuitously, in all cases, the tests worked in OK situations,
6146 which is the norm. However, things would have gone wrong on any write
6147 failures on the smtp file descriptor. This function is used when sending
6148 messages over SMTP and also when doing verify callouts.
6150 2. When Exim is called to do synchronous delivery of a locally submitted
6151 message (the -odf or -odi options), it no longer closes stderr before doing
6154 3. Implemented the mua_wrapper option.
6156 4. Implemented mx_fail_domains and srv_fail_domains for the dnslookup router.
6158 5. Implemented the functions header_remove(), header_testname(),
6159 header_add_at_position(), and receive_remove_recipient(), and exported them
6162 6. If an ACL "warn" statement specified the addition of headers, Exim already
6163 inserted X-ACL-Warn: at the start if there was no header name. However, it
6164 was not making this test for the second and subsequent header lines if
6165 there were newlines in the string. This meant that an invalid header could
6166 be inserted if Exim was badly configured.
6168 7. Allow an ACL "warn" statement to add header lines at the start or after all
6169 the Received: headers, as well as at the end.
6171 8. Added the rcpt_4xx retry error code.
6173 9. Added postmaster_mailfrom=xxx to callout verification option.
6175 10. Added mailfrom=xxxx to the callout verification option, for verify=
6178 11. ${substr_1_:xxxx} and ${substr__3:xxxx} are now diagnosed as syntax errors
6179 (they previously behaved as ${substr_1_0:xxxx} and ${substr:_0_3:xxxx}).
6181 12. Inserted some casts to stop certain compilers warning when using pointer
6182 differences as field lengths or precisions in printf-type calls (mostly
6183 affecting debugging statements).
6185 13. Added optional readline() support for -be (dynamically loaded).
6187 14. Obscure bug fix: if a message error (e.g. 4xx to MAIL) happened within the
6188 same clock tick as a message's arrival, so that its received time was the
6189 same as the "first fail" time on the retry record, and that message
6190 remained on the queue past the ultimate address timeout, every queue runner
6191 would try a delivery (because it was past the ultimate address timeout) but
6192 after another failure, the ultimate address timeout, which should have then
6193 bounced the address, did not kick in. This was a "< instead of <=" error;
6194 in most cases the first failure would have been in the next clock tick
6195 after the received time, and all would be well.
6197 15. The special items beginning with @ in domain lists (e.g. @mx_any) were not
6198 being recognized when the domain list was tested by the match_domain
6199 condition in an expansion string.
6201 16. Added the ${str2b64: operator.
6203 17. Exim was always calling setrlimit() to set a large limit for the number of
6204 processes, without checking whether the existing limit was already
6205 adequate. (It did check for the limit on file descriptors.) Furthermore,
6206 errors from getrlimit() and setrlimit() were being ignored. Now they are
6207 logged to the main and panic logs, but Exim does carry on, to try to do its
6208 job under whatever limits there are.
6210 18. Imported PCRE 5.0.
6212 19. Trivial typo in log message " temporarily refused connection" (the leading
6215 20. If the log selector return_path_on_delivery was set and an address was
6216 redirected to /dev/null, the delivery process crashed because it assumed
6217 that a return path would always be set for a "successful" delivery. In this
6218 case, the whole delivery is bypassed as an optimization, and therefore no
6221 21. Internal re-arrangement: the function for sending a challenge and reading
6222 a response while authentication was assuming a zero-terminated challenge
6223 string. It's now changed to take a pointer and a length, to allow for
6224 binary data in such strings.
6226 22. Added the cyrus_sasl authenticator (code supplied by MBM).
6228 23. Exim was not respecting finduser_retries when seeking the login of the
6229 uid under which it was called; it was always trying 10 times. (The default
6230 setting of finduser_retries is zero.) Also, it was sleeping after the final
6231 failure, which is pointless.
6233 24. Implemented tls_on_connect_ports.
6235 25. Implemented acl_smtp_predata.
6237 26. If the domain in control=submission is set empty, Exim assumes that the
6238 authenticated id is a complete email address when it generates From: or
6239 Sender: header lines.
6241 27. Added "#define SOCKLEN_T int" to OS/os.h-SCO and OS/os.h-SCO_SV. Also added
6242 definitions to OS/Makefile-SCO and OS/Makefile-SCO_SV that put basename,
6243 chown and chgrp in /bin and hostname in /usr/bin.
6245 28. Exim was keeping the "process log" file open after each use, just as it
6246 does for the main log. This opens the possibility of it remaining open for
6247 long periods when the USR1 signal hits a daemon. Occasional processlog
6248 errors were reported, that could have been caused by this. Anyway, it seems
6249 much more sensible not to leave this file open at all, so that is what now
6252 29. The long-running daemon process does not normally write to the log once it
6253 has entered its main loop, and it closes the log before doing so. This is
6254 so that log files can straightforwardly be renamed and moved. However,
6255 there are a couple of unusual error situations where the daemon does write
6256 log entries, and I had neglected to close the log afterwards.
6258 30. The text of an SMTP error response that was received during a remote
6259 delivery was being truncated at 512 bytes. This is too short for some of
6260 the long messages that one sometimes sees. I've increased the limit to
6263 31. It is now possible to make retry rules that apply only when a message has a
6264 specific sender, in particular, an empty sender.
6266 32. Added "control = enforce_sync" and "control = no_enforce_sync". This makes
6267 it possible to be selective about when SMTP synchronization is enforced.
6269 33. Added "control = caseful_local_part" and "control = "caselower_local_part".
6271 32. Implemented hosts_connection_nolog.
6273 33. Added an ACL for QUIT.
6275 34. Setting "delay_warning=" to disable warnings was not working; it gave a
6278 35. Added mailbox_size and mailbox_filecount to appendfile.
6280 36. Added control = no_multiline_responses to ACLs.
6282 37. There was a bug in the logic of the code that waits for the clock to tick
6283 in the case where the clock went backwards by a substantial amount such
6284 that the microsecond fraction of "now" was more than the microsecond
6285 fraction of "then" (but the whole seconds number was less).
6287 38. Added support for the libradius Radius client library this is found on
6288 FreeBSD (previously only the radiusclient library was supported).
6294 1. When certain lookups returned multiple values in the form name=value, the
6295 quoting of the values was not always being done properly. Specifically:
6296 (a) If the value started with a double quote, but contained no whitespace,
6298 (b) If the value contained whitespace other than a space character (i.e.
6299 tabs or newlines or carriage returns) it was not quoted.
6300 This fix has been applied to the mysql and pgsql lookups by writing a
6301 separate quoting function and calling it from the lookup code. The fix
6302 should probably also be applied to nisplus, ibase and oracle lookups, but
6303 since I cannot test any of those, I have not disturbed their existing code.
6305 2. A hit in the callout cache for a specific address caused a log line with no
6306 reason for rejecting RCPT. Now it says "Previous (cached) callout
6307 verification failure".
6309 3. There was an off-by-one bug in the queryprogram router. An over-long
6310 return line was truncated at 256 instead of 255 characters, thereby
6311 overflowing its buffer with the terminating zero. As well as fixing this, I
6312 have increased the buffer size to 1024 (and made a note to document this).
6314 4. If an interrupt, such as the USR1 signal that is send by exiwhat, arrives
6315 when Exim is waiting for an SMTP response from a remote server, Exim
6316 restarts its select() call on the socket, thereby resetting its timeout.
6317 This is not a problem when such interrupts are rare. Somebody set up a cron
6318 job to run exiwhat every 2 minutes, which is less than the normal select()
6319 timeout (5 or 10 minutes). This meant that the select() timeout never
6320 kicked in because it was always reset. I have fixed this by comparing the
6321 time when an interrupt arrives with the time at the start of the first call
6322 to select(). If more time than the timeout has elapsed, the interrupt is
6323 treated as a timeout.
6325 5. Some internal re-factoring in preparation for the addition of Sieve
6326 extensions (by MH). In particular, the "personal" test is moved to a
6327 separate function, and given an option for scanning Cc: and Bcc: (which is
6328 not set for Exim filters).
6330 6. When Exim created an email address using the login of the caller as the
6331 local part (e.g. when creating a From: or Sender: header line), it was not
6332 quoting the local part when it contained special characters such as @.
6334 7. Installed new OpenBSD configuration files.
6336 8. Reworded some messages for syntax errors in "and" and "or" conditions to
6337 try to make them clearer.
6339 9. Callout options, other than the timeout value, were being ignored when
6340 verifying sender addresses in header lines. For example, when using
6342 verify = header_sender/callout=no_cache
6344 the cache was (incorrectly) being used.
6346 10. Added a missing instance of ${EXE} to the exim_install script; this affects
6347 only the Cygwin environment.
6349 11. When return_path_on_delivery was set as a log selector, if different remote
6350 addresses in the same message used different return paths and parallel
6351 remote delivery occurred, the wrong values would sometimes be logged.
6352 (Whenever a remote delivery process finished, the return path value from
6353 the most recently started remote delivery process was logged.)
6355 12. RFC 3848 specifies standard names for the "with" phrase in Received: header
6356 lines when AUTH and/or TLS are in use. This is the "received protocol"
6357 field. Exim used to use "asmtp" for authenticated SMTP, without any
6358 indication (in the protocol name) for TLS use. Now it follows the RFC and
6359 uses "esmtpa" if the connection is authenticated, "esmtps" if it is
6360 encrypted, and "esmtpsa" if it is both encrypted and authenticated. These
6361 names appear in log lines as well as in Received: header lines.
6363 13. Installed MH's patches for Sieve to add the "copy" and "vacation"
6364 extensions, and comparison tests, and to fix some bugs.
6366 14. Changes to the "personal" filter test:
6368 (1) The test was buggy in that it was just doing the equivalent of
6369 "contains" tests on header lines. For example, if a user's address was
6370 anne@some.where, the "personal" test would incorrectly be true for
6372 To: susanne@some.where
6374 This test is now done by extracting each address from the header in turn,
6375 and checking the entire address. Other tests that are part of "personal"
6376 are now done using regular expressions (for example, to check local parts
6377 of addresses in From: header lines).
6379 (2) The list of non-personal local parts in From: addresses has been
6380 extended to include "listserv", "majordomo", "*-request", and "owner-*",
6381 taken from the Sieve specification recommendations.
6383 (3) If the message contains any header line starting with "List-" it is
6384 treated as non-personal.
6386 (4) The test for "circular" in the Subject: header line has been removed
6387 because it now seems ill-conceived.
6389 15. Minor typos in src/EDITME comments corrected.
6391 16. Installed latest exipick from John Jetmore.
6393 17. If headers_add on a router specified a text string that was too long for
6394 string_sprintf() - that is, longer than 8192 bytes - Exim panicked. The use
6395 of string_sprintf() is now avoided.
6397 18. $message_body_size was not set (it was always zero) when running the DATA
6398 ACL and the local_scan() function.
6400 19. For the "mail" command in an Exim filter, no default was being set for
6401 the once_repeat time, causing a random time value to be used if "once" was
6402 specified. (If the value happened to be <= 0, no repeat happened.) The
6403 default is now 0s, meaning "never repeat". The "vacation" command was OK
6404 (its default is 7d). It's somewhat surprising nobody ever noticed this bug
6405 (I found it when inspecting the code).
6407 20. There is now an overall timeout for performing a callout verification. It
6408 defaults to 4 times the callout timeout, which applies to individual SMTP
6409 commands during the callout. The overall timeout applies when there is more
6410 than one host that can be tried. The timeout is checked before trying the
6411 next host. This prevents very long delays if there are a large number of
6412 hosts and all are timing out (e.g. when the network connections are timing
6413 out). The value of the overall timeout can be changed by specifying an
6414 additional sub-option for "callout", called "maxwait". For example:
6416 verify = sender/callout=5s,maxwait=20s
6418 21. Add O_APPEND to the open() call for maildirsize files (Exim already seeks
6419 to the end before writing, but this should make it even safer).
6421 22. Exim was forgetting that it had advertised PIPELINING for the second and
6422 subsequent messages on an SMTP connection. It was also not resetting its
6423 memory on STARTTLS and an internal HELO.
6425 23. When Exim logs an SMTP synchronization error within a session, it now
6426 records whether PIPELINING has been advertised or not.
6428 24. Added 3 instances of "(long int)" casts to time_t variables that were being
6429 formatted using %ld, because on OpenBSD (and perhaps others), time_t is int
6430 rather than long int.
6432 25. Installed the latest Cygwin configuration files from the Cygwin maintainer.
6434 26. Added the never_mail option to autoreply.
6440 1. A reorganization of the code in order to implement 4.40/8 caused a daemon
6441 crash if the getsockname() call failed; this can happen if a connection is
6442 closed very soon after it is established. The problem was simply in the
6443 order in which certain operations were done, causing Exim to try to write
6444 to the SMTP stream before it had set up the file descriptor. The bug has
6445 been fixed by making things happen in the correct order.
6451 1. If "drop" was used in a DATA ACL, the SMTP output buffer was not flushed
6452 before the connection was closed, thus losing the rejection response.
6454 2. Commented out the definition of SOCKLEN_T in os.h-SunOS5. It is needed for
6455 some early Solaris releases, but causes trouble in current releases where
6456 socklen_t is defined.
6458 3. When std{in,out,err} are closed, re-open them to /dev/null so that they
6461 4. Minor refactoring of os.c-Linux to avoid compiler warning when IPv6 is not
6464 5. Refactoring in expand.c to improve memory usage. Pre-allocate a block so
6465 that releasing the top of it at the end releases what was used for sub-
6466 expansions (unless the block got too big). However, discard this block if
6467 the first thing is a variable or header, so that we can use its block when
6468 it is dynamic (useful for very large $message_headers, for example).
6470 6. Lookups now cache *every* query, not just the most recent. A new, separate
6471 store pool is used for this. It can be recovered when all lookup caches are
6472 flushed. Lookups now release memory at the end of their result strings.
6473 This has involved some general refactoring of the lookup sources.
6475 7. Some code has been added to the store_xxx() functions to reduce the amount
6476 of flapping under certain conditions.
6478 8. log_incoming_interface used to affect only the <= reception log lines. Now
6479 it causes the local interface and port to be added to several more SMTP log
6480 lines, for example "SMTP connection from", and rejection lines.
6482 9. The Sieve author supplied some patches for the doc/README.SIEVE file.
6484 10. Added a conditional definition of _BSD_SOCKLEN_T to os.h-Darwin.
6486 11. If $host_data was set by virtue of a hosts lookup in an ACL, its value
6487 could be overwritten at the end of the current message (or the start of a
6488 new message if it was set in a HELO ACL). The value is now preserved for
6489 the duration of the SMTP connection.
6491 12. If a transport had a headers_rewrite setting, and a matching header line
6492 contained an unqualified address, that address was qualified, even if it
6493 did not match any rewriting rules. The underlying bug was that the values
6494 of the flags that permit the existence of unqualified sender and recipient
6495 addresses in header lines (set by {sender,recipient}_unqualified_hosts for
6496 non-local messages, and by -bnq for local messages) were not being
6497 preserved with the message after it was received.
6499 13. When Exim was logging an SMTP synchronization error, it could sometimes log
6500 "next input=" as part of the text comprising the host identity instead of
6501 the correct text. The code was using the same buffer for two different
6502 strings. However, depending on which order the printing function evaluated
6503 its arguments, the bug did not always show up. Under Linux, for example, my
6504 test suite worked just fine.
6506 14. Exigrep contained a use of Perl's "our" scoping after change 4.31/70. This
6507 doesn't work with some older versions of Perl. It has been changed to "my",
6508 which in any case is probably the better facility to use.
6510 15. A really picky compiler found some instances of statements for creating
6511 error messages that either had too many or two few arguments for the format
6514 16. The size of the buffer for calls to the DNS resolver has been increased
6515 from 1024 to 2048. A larger buffer is needed when performing PTR lookups
6516 for addresses that have a lot of PTR records. This alleviates a problem; it
6517 does not fully solve it.
6519 17. A dnsdb lookup for PTR records that receives more data than will fit in the
6520 buffer now truncates the list and logs the incident, which is the same
6521 action as happens when Exim is looking up a host name and its aliases.
6522 Previously in this situation something unpredictable would happen;
6523 sometimes it was "internal error: store_reset failed".
6525 18. If a server dropped the connection unexpectedly when an Exim client was
6526 using GnuTLS and trying to read a response, the client delivery process
6527 crashed while trying to generate an error log message.
6529 19. If a "warn" verb in an ACL added multiple headers to a message in a single
6530 string, for example:
6532 warn message = H1: something\nH2: something
6534 the text was added as a single header line from Exim's point of view
6535 though it ended up OK in the delivered message. However, searching for the
6536 second and subsequent header lines using $h_h2: did not work. This has been
6537 fixed. Similarly, if a system filter added multiple headers in this way,
6538 the routers could not see them.
6540 20. Expanded the error message when iplsearch is called with an invalid key to
6541 suggest using net-iplsearch in a host list.
6543 21. When running tests using -bh, any delays imposed by "delay" modifiers in
6544 ACLs are no longer actually imposed (and a message to that effect is
6547 22. If a "gecos" field in a passwd entry contained escaped characters, in
6548 particular, if it contained a \" sequence, Exim got it wrong when building
6549 a From: or a Sender: header from that name. A second bug also caused
6550 incorrect handling when an unquoted " was present following a character
6551 that needed quoting.
6553 23. "{crypt}" as a password encryption mechanism for a "crypteq" expansion item
6554 was not being matched caselessly.
6556 24. Arranged for all hyphens in the exim.8 source to be escaped with
6559 25. Change 16 of 4.32, which reversed 71 or 4.31 didn't quite do the job
6560 properly. Recipient callout cache records were still being keyed to include
6561 the sender, even when use_sender was set false. This led to far more
6562 callouts that were necessary. The sender is no longer included in the key
6563 when use_sender is false.
6565 26. Added "control = submission" modifier to ACLs.
6567 27. Added the ${base62d: operator to decode base 62 numbers.
6569 28. dnsdb lookups can now access SRV records.
6571 29. CONFIGURE_OWNER can be set at build time to define an alternative owner for
6572 the configuration file.
6574 30. The debug message "delivering xxxxxx-xxxxxx-xx" is now output in verbose
6575 (-v) mode. This makes the output for a verbose queue run more intelligible.
6577 31. Added a use_postmaster feature to recipient callouts.
6579 32. Added the $body_zerocount variable, containing the number of binary zero
6580 bytes in the message body.
6582 33. The time of last modification of the "new" subdirectory is now used as the
6583 "mailbox time last read" when there is a quota error for a maildir
6586 34. Added string comparison operators lt, lti, le, lei, gt, gti, ge, gei.
6588 35. Added +ignore_unknown as a special item in host lists.
6590 36. Code for decoding IPv6 addresses in host lists is now included, even if
6591 IPv6 support is not being compiled. This fixes a bug in which an IPv6
6592 address was recognized as an IP address, but was then not correctly decoded
6593 into binary, causing unexpected and incorrect effects when compared with
6600 1. Very minor rewording of debugging text in manualroute to say "list of
6601 hosts" instead of "hostlist".
6603 2. If verify=header_syntax was set, and a header line with an unqualified
6604 address (no domain) and a large number of spaces between the end of the
6605 name and the colon was received, the reception process suffered a buffer
6606 overflow, and (when I tested it) crashed. This was caused by some obsolete
6607 code that should have been removed. The fix is to remove it!
6609 3. When running in the test harness, delay a bit after writing a bounce
6610 message to get a bit more predictability in the log output.
6612 4. Added a call to search_tidyup() just before forking a reception process. In
6613 theory, someone could use a lookup in the expansion of smtp_accept_max_
6614 per_host which, without the tidyup, could leave open a database connection.
6616 5. Added the variables $recipient_data and $sender_data which get set from a
6617 lookup success in an ACL "recipients" or "senders" condition, or a router
6618 "senders" option, similar to $domain_data and $local_part_data.
6620 6. Moved the writing of debug_print from before to after the "senders" test
6623 7. Change 4.31/66 (moving the time when the Received: is generated) caused
6624 problems for message scanning, either using a data ACL, or using
6625 local_scan() because the Received: header was not generated till after they
6626 were called (in order to set the time as the time of reception completion).
6627 I have revised the way this works. The header is now generated after the
6628 body is received, but before the ACL or local_scan() are called. After they
6629 are run, the timestamp in the header is updated.
6635 1. Change 4.24/6 introduced a bug because the SIGALRM handler was disabled
6636 before starting a queue runner without re-exec. This happened only when
6637 deliver_drop_privilege was set or when the Exim user was set to root. The
6638 effect of the bug was that timeouts during subsequent deliveries caused
6639 crashes instead of being properly handled. The handler is now left at its
6640 default (and expected) setting.
6642 2. The other case in which a daemon avoids a re-exec is to deliver an incoming
6643 message, again when deliver_drop_privilege is set or Exim is run as root.
6644 The bug described in (1) was not present in this case, but the tidying up
6645 of the other signals was missing. I have made the two cases consistent.
6647 3. The ignore_target_hosts setting on a manualroute router was being ignored
6648 for hosts that were looked up using the /MX notation.
6650 4. Added /ignore=<ip list> feature to @mx_any, @mx_primary, and @mx_secondary
6653 5. Change 4.31/55 was buggy, and broke when there was a rewriting rule that
6654 operated on the sender address. After changing the $sender_address to <>
6655 for the sender address verify, Exim was re-instated it as the original
6656 (before rewriting) address, but remembering that it had rewritten it, so it
6657 wasn't rewriting it again. This bug also had the effect of breaking the
6658 sender address verification caching when the sender address was rewritten.
6660 6. The ignore_target_hosts option was being ignored by the ipliteral router.
6661 This has been changed so that if the ip literal address matches
6662 ignore_target_hosts, the router declines.
6664 7. Added expansion conditions match_domain, match_address, and match_local_
6665 part (NOT match_host).
6667 8. The placeholder for the Received: header didn't have a length field set.
6669 9. Added code to Exim itself and to exim_lock to test for a specific race
6670 condition that could lead to file corruption when using MBX delivery. The
6671 issue is with the lockfile that is created in /tmp. If this file is removed
6672 after a process has opened it but before that process has acquired a lock,
6673 there is the potential for a second process to recreate the file and also
6674 acquire a lock. This could lead to two Exim processes writing to the file
6675 at the same time. The added code performs the same test as UW imapd; it
6676 checks after acquiring the lock that its file descriptor still refers to
6677 the same named file.
6679 10. The buffer for building added header lines was of fixed size, 8192 bytes.
6680 It is now parameterized by HEADER_ADD_BUFFER_SIZE and this can be adjusted
6683 11. Added the smtp_active_hostname option. If used, this will typically be made
6684 to depend on the incoming interface address. Because $interface_address is
6685 not set up until the daemon has forked a reception process, error responses
6686 that can happen earlier (such as "too many connections") no longer contain
6689 12. If an expansion in a condition on a "warn" statement fails because a lookup
6690 defers, the "warn" statement is abandoned, and the next ACL statement is
6691 processed. Previously this caused the whole ACL to be aborted.
6693 13. Added the iplsearch lookup type.
6695 14. Added ident_timeout as a log selector.
6697 15. Added tls_certificate_verified as a log selector.
6699 16. Added a global option tls_require_ciphers (compare the smtp transport
6700 option of the same name). This controls incoming TLS connections.
6702 17. I finally figured out how to make tls_require_ciphers do a similar thing
6703 in GNUtls to what it does in OpenSSL, that is, set up an appropriate list
6704 before starting the TLS session.
6706 18. Tabs are now shown as \t in -bP output.
6708 19. If the log selector return_path_on_delivery was set, Exim crashed when
6709 bouncing a message because it had too many Received: header lines.
6711 20. If two routers both had headers_remove settings, and the first one included
6712 a superfluous trailing colon, the final name in the first list and the
6713 first name in the second list were incorrectly joined into one item (with a
6714 colon in the middle).
6720 1. Added -C and -D options to the exinext utility, mainly to make it easier
6721 to include in the automated testing, but these could be helpful when
6722 multiple configurations are in use.
6724 2. The exinext utility was not formatting the output nicely when there was
6725 an alternate port involved in the retry record key, nor when there was a
6726 message id as well (for retries that were specific to a specific message
6727 and a specific host). It was also confused by IPv6 addresses, because of
6728 the additional colons they contain. I have fixed the IPv4 problem, and
6729 patched it up to do a reasonable job for IPv6.
6731 3. When there is an error after a MAIL, RCPT, or DATA SMTP command during
6732 delivery, the log line now contains "pipelined" if PIPELINING was used.
6734 4. An SMTP transport process used to panic and die if the bind() call to set
6735 an explicit outgoing interface failed. This has been changed; it is now
6736 treated in the same way as a connect() failure.
6738 5. A reference to $sender_host_name in the part of a conditional expansion
6739 that was being skipped was still causing a DNS lookup. This no longer
6742 6. The def: expansion condition was not recognizing references to header lines
6743 that used bh_ and bheader_.
6745 7. Added the _cache feature to named lists.
6747 8. The code for checking quota_filecount in the appendfile transport was
6748 allowing one more file than it should have been.
6750 9. For compatibility with Sendmail, the command line option
6758 and sets the incoming protocol and host name (for trusted callers). The
6759 host name and its colon can be omitted when only the protocol is to be set.
6760 Note the Exim already has two private options, -pd and -ps, that refer to
6761 embedded Perl. It is therefore impossible to set a protocol value of "d" or
6762 "s", but I don't think that's a major issue.
6764 10. A number of refactoring changes to the code, none of which should affect
6767 (a) The number of logging options was getting close to filling up the
6768 32-bit word that was used as a bit map. I have split them into two classes:
6769 those that are passed in the argument to log_write(), and those that are
6770 only ever tested independently outside of that function. These are now in
6771 separate 32-bit words, so there is plenty of room for expansion again.
6772 There is no change in the user interface or the logging behaviour.
6774 (b) When building, for example, log lines, the code previously used a
6775 macro that called string_cat() twice, in order to add two strings. This is
6776 not really sufficiently general. Furthermore, there was one instance where
6777 it was actually wrong because one of the argument was used twice, and in
6778 one call a function was used. (As it happened, calling the function twice
6779 did not affect the overall behaviour.) The macro has been replaced by a
6780 function that can join an arbitrary number of extra strings onto a growing
6783 (c) The code for expansion conditions now uses a table and a binary chop
6784 instead of a serial search (which was left over from when there were very
6785 few conditions). Also, it now recognizes conditions like "pam" even when
6786 the relevant support is not compiled in: a suitably worded error message is
6787 given if an attempt is made to use such a condition.
6789 11. Added ${time_interval:xxxxx}.
6791 12. A bug was causing one of the ddress fields not to be passed back correctly
6792 from remote delivery subprocesses. The field in question was not being
6793 subsequently used, so this caused to problems in practice.
6795 13. Added new log selectors queue_time and deliver_time.
6797 14. Might have fixed a bug in maildirsizefile handling that threw up
6798 "unexpected character" debug warnings, and recalculated the data
6799 unnecessarily. In any case, I expanded the warning message to give more
6802 15. Added the message "Restricted characters in address" to the statements in
6803 the default ACL that block characters like @ and % in local parts.
6805 16. Change 71 for release 4.31 proved to be much less benign that I imagined.
6806 Three changes have been made:
6808 (a) There was a serious bug; a negative response to MAIL caused the whole
6809 recipient domain to be cached as invalid, thereby blocking all messages
6810 to all local parts at the same domain, from all senders. This bug has
6811 been fixed. The domain is no longer cached after a negative response to
6812 MAIL if the sender used is not empty.
6814 (b) The default behaviour of using MAIL FROM:<> for recipient callouts has
6817 (c) A new callout option, "use_sender" has been added for people who want
6818 the modified behaviour.
6824 1. Removed "EXTRALIBS=-lwrap" from OS/Makefile-Unixware7 on the advice of
6827 2. Removed "LIBS = -lresolv" from OS/Makefile-Darwin as it is not needed, and
6828 indeed breaks things for older releases.
6830 3. Added additional logging to the case where there is a problem reading data
6831 from a filter that is running in a subprocess using a pipe, in order to
6832 try to track down a specific problem.
6834 4. Testing facility fudge: when running in the test harness and attempting
6835 to connect to 10.x.x.x (expecting a connection timeout) I'm now sometimes
6836 getting "No route to host". Convert this to a timeout.
6838 5. Define ICONV_ARG2_TYPE as "char **" for Unixware7 to avoid compiler
6841 6. Some OS don't have socklen_t but use size_t instead. This affects the
6842 fifth argument of getsockopt() amongst other things. This is now
6843 configurable by a macro called SOCKLEN_T which defaults to socklen_t, but
6844 can be set for individual OS. I have set it for SunOS5, OSF1, and
6845 Unixware7. Current versions of SunOS5 (aka Solaris) do have socklen_t, but
6846 some earlier ones do not.
6848 7. Change 4.30/15 was not doing the test caselessly.
6850 8. The standard form for an IPv6 address literal was being rejected by address
6851 parsing in, for example, MAIL and RCPT commands. An example of this kind of
6852 address is [IPv6:2002:c1ed:8229:10:202:2dff:fe07:a42a]. Exim now accepts
6853 this, as well as the form without the "IPv6" on the front (but only when
6854 address literals are enabled, of course).
6856 9. Added some casts to avoid compiler warnings in OS/os.c-Linux.
6858 10. Exim crashed if a message with an empty sender address specified by -f
6859 encountered a router with an errors_to setting. This could be provoked only
6860 by a command such as
6864 where an empty string was supplied; "<>" did not hit this bug.
6866 11. Installed PCRE release 4.5.
6868 12. If EHLO/HELO was rejected by an ACL, the value of $sender_helo_name
6869 remained set. It is now erased.
6871 13. exiqgrep wasn't working on MacOS X because it didn't correctly compute
6872 times from message ids (which are base 36 rather than the normal 62).
6874 14. "Expected" SMTP protocol errors that can arise when PIPELINING is in use
6875 were being counted as actual protocol errors, and logged if the log
6876 selector +smtp_protocol_error was set. One cannot be perfect in this test,
6877 but now, if PIPELINING has been advertised, RCPT following a rejected MAIL,
6878 and DATA following a set of rejected RCPTs do not count as protocol errors.
6879 In other words, Exim assumes they were pipelined, though this may not
6880 actually be the case. Of course, in all cases the client gets an
6881 appropriate error code.
6883 15. If a lookup fails in an ACL condition, a message about the failure may
6884 be available; it is used if testing the ACL cannot continue, because most
6885 such messages specify what the cause of the deferral is. However, some
6886 messages (e.g. "MYSQL: no data found") do not cause a defer. There was bug
6887 that caused an old message to be retained and used if a later statement
6888 caused a defer, replacing the real cause of the deferral.
6890 16. If an IP address had so many PTR records that the DNS lookup buffer
6891 was not large enough to hold them, Exim could crash while trying to process
6892 the truncated data. It now detects and logs this case.
6894 17. Further to 4.21/58, another change has been made: if (and only if) the
6895 first line of a message (the first header line) ends with CRLF, a bare LF
6896 in a subsequent header line has a space inserted after it, so as not to
6897 terminate the header.
6899 18. Refactoring: tidied an ugly bit of code in appendfile that copied data
6900 unnecessarily, used atoi() instead of strtol(), and didn't check the
6901 termination when getting file sizes from file names by regex.
6903 19. Completely re-implemented the support for maildirsize files, in the light
6904 of a number of problems with the previous contributed implementation
6905 (4.30/29). In particular:
6907 . If the quota is zero, the maildirsize file is maintained, but no quota is
6910 . If the maildir directory does not exist, it is created before any attempt
6911 to write a maildirsize file.
6913 . The quota value in the file is just a cache; if the quota is changed in
6914 the transport, the new value overrides.
6916 . A regular expression is available for excluding directories from the
6919 20. The autoreply transport checks the characters in options that define the
6920 message's headers; it allows continued headers, but it was checking with
6921 isspace() after an embedded newline instead of explicitly looking for a
6924 21. If all the "regular" hosts to which an address was routed had passed their
6925 expiry times, and had not reached their retry times, the address was
6926 bounced, even if fallback hosts were defined. Now Exim should go on to try
6929 22. Increased buffer sizes in the callout code from 1024 to 4096 to match the
6930 equivalent code in the SMTP transport. Some hosts send humungous responses
6931 to HELO/EHLO, more than 1024 it seems.
6933 23. Refactoring: code in filter.c used (void *) for "any old type" but this
6934 gives compiler warnings in some environments. I've now done it "properly",
6937 24. The replacement for inet_ntoa() that is used with gcc on IRIX systems
6938 (because of problems with the built-in one) was declared to return uschar *
6939 instead of char *, causing compiler failure.
6941 25. Fixed a file descriptor leak when processing alias/forward files.
6943 26. Fixed a minor format string issue in dbfn.c.
6945 27. Typo in exim.c: ("dmbnz" for "dbmnz").
6947 28. If a filter file refered to $h_xxx or $message_headers, and the headers
6948 contained RFC 2047 "words", Exim's memory could, under certain conditions,
6951 29. When a sender address is verified, it is cached, to save repeating the test
6952 when there is more than one recipient in a message. However, when the
6953 verification involves a callout, it is possible for different callout
6954 options to be set for different recipients. It is too complicated to keep
6955 track of this in the cache, so now Exim always runs a verification when a
6956 callout is required, relying on the callout cache for the optimization.
6957 The overhead is duplication of the address routing, but this should not be
6960 30. Fixed a bug in callout caching. If a RCPT command caused the sender address
6961 to be verified with callout=postmaster, and the main callout worked but the
6962 postmaster check failed, the verification correctly failed. However, if a
6963 subsequent RCPT command asked for sender verification *without* the
6964 postmaster check, incorrect caching caused this verification also to fail,
6967 31. Exim caches DNS lookup failures so as to avoid multiple timeouts; however,
6968 it was not caching the DNS options (qualify_single, search_parents) that
6969 were used when the lookup failed. A subsequent lookup with different
6970 options therefore always gave the same answer, though there were cases
6971 where it should not have. (Example: a "domains = !$mx_any" option on a
6972 dnslookup router: the "domains" option is always processed without any
6973 widening, but the router might have qualify_single set.) Now Exim uses the
6974 cached value only when the same options are set.
6976 32. Added John Jetmore's "exipick" utility to the distribution.
6978 33. GnuTLS: When an attempt to start a TLS session fails for any reason other
6979 than a timeout (e.g. a certificate is required, and is not provided), an
6980 Exim server now closes the connection immediately. Previously it waited for
6981 the client to close - but if the client is SSL, it seems that they each
6982 wait for each other, leading to a delay before one of them times out.
6984 34: GnuTLS: Updated the code to use the new GnuTLS 1.0.0 API. I have not
6985 maintained 0.8.x compatibility because I don't think many are using it, and
6986 it is clearly obsolete.
6988 35. Added TLS support for CRLs: a tls_crl global option and one for the smtp
6991 36. OpenSSL: $tls_certificate_verified was being set to 1 even if the
6992 client certificate was expired. A simple patch fixes this, though I don't
6993 understand the full logic of why the verify callback is called multiple
6996 37. OpenSSL: a patch from Robert Roselius: "Enable client-bug workaround.
6997 Versions of OpenSSL as of 0.9.6d include a 'CBC countermeasure' feature,
6998 which causes problems with some clients (such as the Certicom SSL Plus
6999 library used by Eudora). This option, SSL_OP_DONT_INSERT_EMPTY_FRAGMENTS,
7000 disables the coutermeasure allowing Eudora to connect."
7002 38. Exim was not checking that a write() to a log file succeeded. This could
7003 lead to Bad Things if a log got too big, in particular if it hit a file
7004 size limit. Exim now panics and dies if it cannot write to a log file, just
7005 as it does if it cannot open a log file.
7007 39. Modified OS/Makefile-Linux so that it now contains
7009 CFLAGS=-O -D_FILE_OFFSET_BITS=64 -D_LARGEFILE_SOURCE
7011 The two -D definitions ensure that Exim is compiled with large file
7012 support, which makes it possible to handle log files that are bigger than
7015 40. Fixed a subtle caching bug: if (in an ACL or a set of routers, for
7016 instance) a domain was checked against a named list that involved a lookup,
7017 causing $domain_data to be set, then another domain was checked against the
7018 same list, then the first domain was re-checked, the value of $domain_data
7019 after the final check could be wrong. In particular, if the second check
7020 failed, it could be set empty. This bug probably also applied to
7023 41. The strip_trailing_dot option was not being applied to the address given
7024 with the -f command-line option.
7026 42. The code for reading a message's header from the spool was incrementing
7027 $received_count, but never initializing it. This meant that the value was
7028 incorrect (doubled) while delivering a message in the same process in which
7029 it was received. In the most common configuration of Exim, this never
7030 happens - a fresh exec is done - but it can happen when
7031 deliver_drop_privilege is set.
7033 43. When Exim logs an SMTP synchronization error - client data sent too soon -
7034 it now includes up to 150 characters of the unexpected data in the log
7037 44. The exim_dbmbuild utility uses fixed size buffers for reading input lines
7038 and building data strings. The size of both of these buffers was 10 000
7039 bytes - far larger than anybody would *ever* want, thought I. Needless to
7040 say, somebody hit the limit. I have increased the maximum line length to
7041 20 000 and the maximum data length of concatenated lines to 100 000. I have
7042 also fixed two bugs, because there was no checking on these buffers. Tsk,
7043 tsk. Now exim_dbmbuild gives a message and exits with an error code if a
7044 buffer is too small.
7046 45. The exim_dbmbuild utility did not support quoted keys, as Exim does in
7047 lsearch lookups. Now it does.
7049 46. When parsing a route_list item in a manualroute router, a fixed-length
7050 buffer was used for the list of hosts. I made this 1024 bytes long,
7051 thinking that nobody would ever have a list of hosts that long. Wrong.
7052 Somebody had a whole pile of complicated expansion conditions, and the
7053 string was silently truncated, leading to an expansion error. It turns out
7054 that it is easier to change to an unlimited length (owing to other changes
7055 that have happened since this code was originally written) than to build
7056 structure for giving a limitation error. The length of the item that
7057 expands into the list of hosts is now unlimited.
7059 47. The lsearch lookup could not handle data where the length of text line was
7060 more than 4095 characters. Such lines were truncated, leading to shortened
7061 data being returned. It should now handle lines of any length.
7063 48. Minor wording revision: "cannot test xxx in yyy ACL" becomes "cannot test
7064 xxx condition in yyy ACL" (e.g. "cannot test domains condition in DATA
7067 49. Cosmetic tidy to scripts like exicyclog that are generated by globally
7068 replacing strings such as BIN_DIRECTORY in a source file: the replacement
7069 no longer happens in comment lines. A list of replacements is now placed
7070 at the head of all of the source files, except those whose only change is
7071 to replace PERL_COMMAND in the very first #! line.
7073 50. Replaced the slow insertion sort in queue.c, for sorting the list of
7074 messages on the queue, with a bottom-up merge sort, using code contributed
7075 by Michael Haardt. This should make operations like -bp somewhat faster on
7076 large queues. It won't affect queue runners, except when queue_run_in_order
7079 51. Installed eximstats 1.31 in the distribution.
7081 52. Added support for SRV lookups to the dnslookup router.
7083 53. If an ACL referred to $message_body or $message_body_end, the value was not
7084 reset for any messages that followed in the same SMTP session.
7086 54. The store-handling optimization for building very long strings was not
7087 differentiating between the different store pools. I don't think this
7088 actually made any difference in practice, but I've tidied it.
7090 55. While running the routers to verify a sender address, $sender_address
7091 was still set to the sender address. This is wrong, because when routing to
7092 send a bounce to the sender, it would be empty. Therefore, I have changed
7093 it so that, while verifying a sender address, $sender_address is set to <>.
7094 (There is no change to what happens when verifying a recipient address.)
7096 56. After finding MX (or SRV) records, Exim was doing a DNS lookup for the
7097 target A or AAAA records (if not already returned) without resetting the
7098 qualify_single or search_parents options of the DNS resolver. These are
7099 inappropriate in this case because the targets of MX and SRV records must
7100 be FQDNs. A broken DNS record could cause trouble if it happened to have a
7101 target that, when qualified, matched something in the local domain. These
7102 two options are now turned off when doing these lookups.
7104 57. It seems that at least some releases of Reiserfs (which does not have the
7105 concept of a fixed number of inodes) returns zero and not -1 for the
7106 number of available inodes. This interacted badly with check_spool_inodes,
7107 which assumed that -1 was the "no such thing" setting. What I have done is
7108 to check that the total number of inodes is greater than zero before doing
7109 the test of how many are available.
7111 58. When a "warn" ACL statement has a log_message modifier, the message is
7112 remembered, and not repeated. This is to avoid a lot of repetition when a
7113 message has many recipients that cause the same warning to be written.
7114 However, Exim was preserving the list of already written lines for an
7115 entire SMTP session, which doesn't seem right. The memory is now reset if a
7116 new message is started.
7118 59. The "rewrite" debugging flag was not showing the result of rewriting in the
7119 debugging output unless log_rewrite was also set.
7121 60. Avoid a compiler warning on 64-bit systems in dsearch.c by avoiding the use
7122 of (int)(handle) when we know that handle contains (void *)(-1).
7124 61. The Exim daemon panic-logs an error return when it closes the incoming
7125 connection. However "connection reset by peer" seems to be common, and
7126 isn't really an error worthy of noting specially, so that particular error
7129 62. When Exim is trying to find all the local interfaces, it used to panic and
7130 die if the ioctl to get the interface flags failed. However, it seems that
7131 on at least one OS (Solaris 9) it is possible to have an interface that is
7132 included in the list of interfaces, but for which you get a failure error
7133 for this call. This happens when the interface is not "plumbed" into a
7134 protocol (i.e. neither IPv4 nor IPv6). I've changed the code so that a
7135 failure of the "get flags" call assumes that the interface is down.
7137 63. Added a ${eval10: operator, which assumes all numbers are decimal. This
7138 makes life easier for people who are doing arithmetic on fields extracted
7139 from dates, where you often get leading zeros that should not be
7140 interpreted as octal.
7142 64. Added qualify_domain to the redirect router, to override the global
7145 65. If a pathologically long header line contained very many addresses (the
7146 report of this problem mentioned 10 000) and each of them was rewritten,
7147 Exim could use up a very large amount of memory. (It kept on making new
7148 copies of the header line as it rewrote, and never released the old ones.)
7149 At the expense of a bit more processing, the header rewriting function has
7150 been changed so that it no longer eats memory in this way.
7152 66. The generation of the Received: header has been moved from the time that a
7153 message starts to be received, to the time that it finishes. The timestamp
7154 in the Received: header should now be very close to that of the <= log
7155 line. There are two side-effects of this change:
7157 (a) If a message is rejected by a DATA or non-SMTP ACL or local_scan(), the
7158 logged header lines no longer include the local Received: line, because
7159 it has not yet been created. The same applies to a copy of the message
7160 that is returned to a non-SMTP sender when a message is rejected.
7162 (b) When a filter file is tested using -bf, no additional Received: header
7163 is added to the test message. After some thought, I decided that this
7166 This change does not affect the value of $received_for. It is still set
7167 after address rewriting, but before local_scan() is called.
7169 67. Installed the latest Cygwin-specific files from the Cygwin maintainer.
7171 68. GnuTLS: If an empty file is specified for tls_verify_certificates, GnuTLS
7172 gave an unhelpful panic error message, and a defer error. I have managed to
7173 change this behaviour so that it now rejects any supplied certificate,
7174 which seems right, as the list of acceptable certificates is empty.
7176 69. OpenSSL: If an empty file is specified for tls_verify_certificates, OpenSSL
7177 gave an unhelpful defer error. I have not managed to make this reject any
7178 supplied certificates, but the error message it gives is "no certificate
7179 supplied", which is not helpful.
7181 70. exigrep's output now also includes lines that are not associated with any
7182 message, but which match the given pattern. Implemented by a patch from
7183 Martin Sluka, which also tidied up the Perl a bit.
7185 71. Recipient callout verification, like sender verification, was using <> in
7186 the MAIL FROM command. This isn't really the right thing, since the actual
7187 sender may affect whether the remote host accepts the recipient or not. I
7188 have changed it to use the actual sender in the callout; this means that
7189 the cache record is now keyed on a recipient/sender pair, not just the
7190 recipient address. There doesn't seem to be a real danger of callout loops,
7191 since a callout by the remote host to check the sender would use <>.
7192 [SEE ABOVE: changed after hitting problems.]
7194 72. Exim treats illegal SMTP error codes that do not begin with 4 or 5 as
7195 temporary errors. However, in the case of such a code being given after
7196 the end of a data transmission (i.e. after ".") Exim was failing to write
7197 a retry record for the message. (Yes, there was some broken host that was
7198 actually sending 8xx at this point.)
7200 73. An unknown lookup type in a host list could cause Exim to panic-die when
7201 the list was checked. (An example that provoked this was putting <; in the
7202 middle of a list instead of at the start.) If this happened during a DATA
7203 ACL check, a -D file could be left lying around. This kind of configuration
7204 error no longer causes Exim to die; instead it causes a defer error. The
7205 incident is still logged to the main and panic logs.
7207 74. Buglet left over from Exim 3 conversion. The message "too many messages
7208 in one connection" was written to the rejectlog but not the mainlog, except
7209 when address rewriting (yes!) was being logged.
7211 75. Added write_rejectlog option.
7213 76. When a system filter was run not as root (that is, when system_filter_user
7214 was set), the values of the $n variables were not being returned to the
7215 main process; thus, they were not subsequently available in the $sn
7218 77. Added +return_path_on_delivery log selector.
7220 78. A connection timeout was being treated differently from recipients deferred
7221 when testing hosts_max_try with a message that was older than the host's
7222 retry timeout. (The host should not be counted, thus allowing all hosts to
7223 be tried at least once before bouncing.) This may have been the cause of an
7224 occasionally reported bug whereby a message would remain on the queue
7225 longer than the retry timeout, but would be bounced if a delivery was
7226 forced. I say "may" because I never totally pinned down the problem;
7227 setting up timeout/retry tests is difficult. See also the next item.
7229 79. The ultimate address timeout was not being applied to errors that involved
7230 a combination of host plus message (for example, a timeout on a MAIL
7231 command). When an address resolved to a number of possible hosts, and they
7232 were not all tried for each delivery (e.g. because of hosts_max_try), a
7233 message could remain on the queue longer than the retry timeout.
7235 80. Sieve bug: "stop" inside "elsif" was broken. Applied a patch from Michael
7238 81. Fixed an obscure SMTP outgoing bug which required at least the following
7239 conditions: (a) there was another message waiting for the same server;
7240 (b) the server returned 5xx to all RCPT commands in the first message so
7241 that the message was not completed; (c) the server dropped the connection
7242 or gave a negative response to the RSET that Exim sends to abort the
7243 transaction. The observed case was a dropped connection after DATA that had
7244 been sent in pipelining mode. That is, the server had advertised PIPELINING
7245 but was not implementing it correctly. The effect of the bug was incorrect
7246 behaviour, such as trying another host, and this could lead to a crash.
7252 1. The 3rd arguments to getsockname(), getpeername(), and accept() in exim.c
7253 and daemon.c were passed as pointers to ints; they should have been
7254 pointers to socklen_t variables (which are typically unsigned ints).
7256 2. Some signed/unsigned type warnings in the os.c file for Linux have been
7259 3. Fixed a really odd bug that affected only the testing scheme; patching a
7260 certain fixed string in the binary changed the value of another string that
7261 happened to be identical to the end of the original first string.
7263 4. When gethostbyname() (or equivalent) is passed an IP address as a "host
7264 name", it returns that address as the IP address. On some operating
7265 systems (e.g. Solaris), it also passes back the IP address string as the
7266 "host name". However, on others (e.g. Linux), it passes back an empty
7267 string. Exim wasn't checking for this, and was changing the host name to an
7268 empty string, assuming it had been canonicalized.
7270 5. Although rare, it is permitted to have more than one PTR record for a given
7271 IP address. I thought that gethostbyaddr() or getipnodebyaddr() always gave
7272 all the names associated with an address, because they do in Solaris.
7273 However, it seems that they do not in Linux for data that comes from the
7274 DNS. If an address in /etc/hosts has multiple names, they _are_ all given.
7275 I found this out when I moved to a new Linux workstation and tried to run
7276 the Exim test suite.
7278 To get round this problem I have changed the code so that it now does its
7279 own call to the DNS to look up PTR records when searching for a host name.
7280 If nothing can be found in the DNS, it tries gethostbyaddr(), so that
7281 addresses that are only in /etc/hosts are still found.
7283 This behaviour is, however, controlled by an option called host_lookup_
7284 order, which defaults to "bydns:byaddr". If people want to use the other
7285 order, or indeed, just use one or the other means of lookup, they can
7286 specify it in this variable.
7288 6. If a PTR record yields an empty name, Exim treats it as non-existent. In
7289 some operating systems, this comes back from gethostbyaddr() as an empty
7290 string, and this is what Exim used to test for. However, it seems that in
7291 other systems, "." is yielded. Exim now tests for this case too.
7293 7. The values of check_spool_space and check_log_space are now held internally
7294 as a number of kilobytes instead of an absolute number of bytes. If a
7295 numbers is specified without 'K' or 'M', it is rounded up to the nearest
7296 kilobyte. This means that much larger values can be stored.
7298 8. Exim monitor: an attempt to get the action menu when not actually pointing
7299 at a message produces an empty menu entitled "No message selected". This
7300 works on Solaris (OpenWindows). However, XFree86 does not like a menu with
7301 no entries in it ("Shell widget menu has zero width and/or height"). So I
7302 have added a single, blank menu entry in this case.
7304 9. Added ${quote_local_part.
7306 10. MIME decoding is now applied to the contents of Subject: header lines when
7309 11. Now that a reference to $sender_host_address automatically causes a reverse
7310 lookup to occur if necessary (4.13/18), there is no need to arrange for a
7311 host lookup before query-style lookups in lists that might use this
7312 variable. This has therefore been abolished, and the "net-" prefix is no
7313 longer necessary for query-style lookups.
7315 12. The Makefile for SCO_SV contained a setting of LDFLAGS. This appears to
7316 have been a typo for LFLAGS, so it has been changed.
7318 13. The install script calls Exim with "-C /dev/null" in order to find the
7319 version number. If ALT_CONFIG_PREFIX was set, this caused an error message
7320 to be output. However, since Exim outputs its version number before the
7321 error, it didn't break the script. It just looked ugly. I fixed this by
7322 always allowing "-C /dev/null" if the caller is root.
7324 14. Ignore overlarge ACL variable number when reading spool file - insurance
7325 against a later release with more variables having written the file.
7327 15. The standard form for an IPv6 address literal was being rejected by EHLO.
7328 Example: [IPv6:2002:c1ed:8229:10:202:2dff:fe07:a42a]. Exim now accepts
7329 this, as well as the form without the "IPv6" on the front.
7331 16. Added CHOWN_COMMAND=/usr/sbin/chown and LIBS=-lresolv to the
7332 OS/Makefile-Darwin file.
7334 17. Fixed typo in lookups/ldap.c: D_LOOKUP should be D_lookup. This applied
7335 only to LDAP libraries that do not have LDAP_OPT_DEREF.
7337 18. After change 4.21/52, "%ld" was used to format the contents of the $inode
7338 variable. However, some OS use ints for inodes. I've added cast to long int
7339 to get rid of the compiler warning.
7341 19. I had forgotten to lock out "/../" in configuration file names when
7342 ALT_CONFIG_PREFIX was set.
7344 20. Routers used for verification do not need to specify transports. However,
7345 if such a router generated a host list, and callout was configured, Exim
7346 crashed, because it could not find a port number from the (non-existent)
7347 transport. It now assumes port 25 in this circumstance.
7349 21. Added the -t option to exigrep.
7351 22. If LOOKUP_LSEARCH is defined, all three linear search methods (lsearch,
7352 wildlsearch, nwildlsearch) are compiled. LOOKUP_WILDLSEARCH and LOOKUP_
7353 NWILDLSEARCH are now obsolete, but retained for compatibility. If either of
7354 them is set, LOOKUP_LSEARCH is forced.
7356 23. "exim -bV" now outputs a list of lookups that are included in the binary.
7358 24. Added sender and host information to the "rejected by local_scan()" log
7359 line; previously there was no indication of these.
7361 25. Added .include_if_exists.
7363 26. Change 3.952/11 added an explicit directory sync on top of a file sync for
7364 Linux. It turns out that not all file systems support this. Apparently some
7365 versions of NFS do not. (It's rare to put Exim's spool on NFS, but people
7366 do it.) To cope with this, the error EINVAL, which means that sync-ing is
7367 not supported on the file descriptor, is now ignored when Exim is trying to
7368 sync a directory. This applies only to Linux.
7370 27. Added -DBIND_8_COMPAT to the CLFAGS setting for Darwin.
7372 28. In Darwin (MacOS X), the PAM headers are in /usr/include/pam and not in
7373 /usr/include/security. There's now a flag in OS/os.h-Darwin to cope with
7376 29. Added support for maildirsize files from supplied patch (modified a bit).
7378 30. The use of :fail: followed by an empty string could lead Exim to respond to
7379 sender verification failures with (e.g.):
7381 550 Verification failed for <xxx>
7382 550 Sender verify failed
7384 where the first response line was missing the '-' that indicates it is not
7385 the final line of the response.
7387 31. The loop for finding the name of the user that called Exim had a hardwired
7388 limit of 10; it now uses the value of finduser_retries, which is used for
7389 all other user lookups.
7391 32. Added $received_count variable, available in data and not_smtp ACLs, and at
7394 33. Exim was neglecting to zero errno before one call of strtol() when
7395 expanding a string and expecting an integer value. On some systems this
7396 resulted in spurious "integer overflow" errors. Also, it was casting the
7397 result into an int without checking.
7399 34. Testing for a connection timeout using "timeout_connect" in the retry rules
7400 did not work. The code looks as if it has *never* worked, though it appears
7401 to have been documented since at least release 1.62. I have made it work.
7403 35. The "timeout_DNS" error in retry rules, also documented since at least
7404 1.62, also never worked. As it isn't clear exactly what this means, and
7405 clearly it isn't a major issue, I have abolished the feature by treating it
7406 as "timeout", and writing a warning to the main and panic logs.
7408 36. The display of retry rules for -brt wasn't always showing the error code
7411 37. Added new error conditions to retry rules: timeout_A, timeout_MX,
7412 timeout_connect_A, timeout_connect_MX.
7414 38. Rewriting the envelope sender at SMTP time did not allow it to be rewritten
7415 to the empty sender.
7417 39. The daemon was not analysing the content of -oX till after it had closed
7418 stderr and disconnected from the controlling terminal. This meant that any
7419 syntax errors were only noted on the panic log, and the return code from
7420 the command was 0. By re-arranging the code a little, I've made the
7421 decoding happen first, so such errors now appear on stderr, and the return
7422 code is 1. However, the actual setting up of the sockets still happens in
7423 the disconnected process, so errors there are still only recorded on the
7426 40. A daemon listener on a wildcard IPv6 socket that also accepts IPv4
7427 connections (as happens on some IP stacks) was logged at start up time as
7428 just listening for IPv6. It now logs "IPv6 with IPv4". This differentiates
7429 it from "IPv6 and IPv4", which means that two separate sockets are being
7432 41. The debug output for gethostbyname2() or getipnodebyname() failures now
7433 says whether AF_INET or AF_INET6 was passed as an argument.
7435 42. Exiwhat output was messed up when time zones were included in log
7438 43. Exiwhat now gives more information about the daemon's listening ports,
7439 and whether -tls-on-connect was used.
7441 44. The "port" option of the smtp transport is now expanded.
7443 45. A "message" modifier in a "warn" statement in a non-message ACL was being
7444 silently ignored. Now an error message is written to the main and panic
7447 46. There's a new ACL modifier called "logwrite" which writes to a log file
7448 as soon as it is encountered.
7450 47. Added $local_user_uid and $local_user_gid at routing time.
7452 48. Exim crashed when trying to verify a sender address that was being
7455 49. Exim was recognizing only a space character after ".include". It now also
7456 recognizes a tab character.
7458 50. Fixed several bugs in the Perl script that creates the exim.8 man page by
7459 extracting the relevant information from the specification. The man page no
7460 longer contains scrambled data for the -d option, and I've added a section
7461 at the front about calling Exim under different names.
7463 51. Added "extra_headers" argument to the "mail" command in filter files.
7465 52. Redirecting mail to an unqualified address in a Sieve filter caused Exim to
7468 53. Installed eximstats 1.29.
7470 54. Added transport_filter_timeout as a generic transport option.
7472 55. Exim no longer adds an empty Bcc: header to messages that have no To: or
7473 Cc: header lines. This was required by RFC 822, but it not required by RFC
7476 56. Exim used to add From:, Date:, and Message-Id: header lines to any
7477 incoming messages that did not have them. Now it does so only if the
7478 message originates locally, that is, if there is no associated remote host
7479 address. When Resent- header lines are present, this applies to the Resent-
7480 lines rather than the non-Resent- lines.
7482 57. Drop incoming SMTP connection after too many syntax or protocol errors. The
7483 limit is controlled by smtp_max_synprot_errors, defaulting to 3.
7485 58. Messages for configuration errors now include the name of the main
7486 configuration file - useful now that there may be more than one file in a
7487 list (.included file names were always shown).
7489 59. Change 4.21/82 (run initgroups() when starting the daemon) causes problems
7490 for those rare installations that do not start the daemon as root or run it
7491 setuid root. I've cut out the call to initgroups() if the daemon is not
7494 60. The Exim user and group can now be bound into the binary as text strings
7495 that are looked up at the start of Exim's processing.
7497 61. Applied a small patch for the Interbase code, supplied by Ard Biesheuvel.
7499 62. Added $mailstore_basename variable.
7501 63. Installed patch to sieve.c from Michael Haardt.
7503 64. When Exim failed to open the panic log after failing to open the main log,
7504 the original message it was trying to log was written to stderr and debug
7505 output, but if they were not available (the usual case in production), it
7506 was lost. Now it is written to syslog before the two lines that record the
7507 failures to open the logs.
7509 65. Users' Exim filters run in subprocesses under the user's uid. It is
7510 possible for a "deliver" command or an alias in a "personal" command to
7511 provoke an address rewrite. If logging of address rewriting is configured,
7512 this fails because the process is not running as root or exim. There may be
7513 a better way of dealing with this, but for the moment (because 4.30 needs
7514 to be released), I have disabled address rewrite logging when running a
7515 filter in a non-root, non-exim process.
7521 1. The buildconfig auxiliary program wasn't quoting the value set for
7522 HEADERS_CHARSET. This caused a compilation error complaining that 'ISO' was
7523 not defined. This bug was masked in 4.22 by the effect that was fixed in
7526 2. Some messages that were rejected after a message id was allocated were
7527 shown as "incomplete" by exigrep. It no longer does this for messages that
7528 are rejected by local_scan() or the DATA or non-SMTP ACLs.
7530 3. If a Message-ID: header used a domain literal in the ID, and Exim did not
7531 have allow_domain_literals set, the ID did not get logged in the <= line.
7532 Domain literals are now always recognized in Message-ID: header lines.
7534 4. The first argument for a ${extract expansion item is the key name or field
7535 number. Leading and trailing spaces in this item were not being ignored,
7536 causing some misleading effects.
7538 5. When deliver_drop_privilege was set, single queue runner processes started
7539 manually (i.e. by the command "exim -q") or by the daemon (which uses the
7540 same command in the process it spins off) were not dropping privilege.
7542 6. When the daemon running as "exim" started a queue runner, it always
7543 re-executed Exim in the spun-off process. This is a waste of effort when
7544 deliver_drop_privilege is set. The new process now just calls the
7545 queue-runner function directly.
7551 1. Typo in the src/EDITME file: it referred to HEADERS_DECODE_TO instead of
7554 2. Change 4.21/73 introduced a bug. The pid file path set by -oP was being
7555 ignored. Though the use of -oP was forcing the writing of a pid file, it
7556 was always written to the default place.
7558 3. If the message "no IP address found for host xxxx" is generated during
7559 incoming verification, it is now followed by identification of the incoming
7560 connection (so you can more easily find what provoked it).
7562 4. Bug fix for Sieve filters: "stop" inside a block was not working properly.
7564 5. Added some features to "harden" Exim a bit more against certain attacks:
7566 (a) There is now a build-time option called FIXED_NEVER_USERS that can
7567 be put in Local/Makefile. This is like the never_users runtime option,
7568 but it cannot be overridden. The default setting is "root".
7570 (b) If ALT_CONFIG_PREFIX is defined in Local/Makefile, it specifies a
7571 prefix string with which any file named in a -C command line option
7574 (c) If ALT_CONFIG_ROOT_ONLY is defined in Local/Makefile, root privilege
7575 is retained for -C and -D only if the caller of Exim is root. Without
7576 it, the exim user may also use -C and -D and retain privilege.
7578 (d) If DISABLE_D_OPTION is defined in Local/Makefile, the use of the -D
7579 command line option is disabled.
7581 6. Macro names set by the -D option must start with an upper case letter, just
7582 like macro names defined in the configuration file.
7584 7. Added "dereference=" facility to LDAP.
7586 8. Two instances of the typo "uknown" in the source files are fixed.
7588 9. If a PERL_COMMAND setting in Local/Makefile was not at the start of a line,
7589 the Configure-Makefile script screwed up while processing it.
7591 10. Incorporated PCRE 4.4.
7593 11. The SMTP synchronization check was not operating right at the start of an
7594 SMTP session. For example, it could not catch a HELO sent before the client
7595 waited for the greeting. There is now a check for outstanding input at the
7596 point when the greeting is written. Because of the duplex, asynchronous
7597 nature of TCP/IP, it cannot be perfect - the incorrect input may be on its
7598 way, but not yet received, when the check is performed.
7600 12. Added tcp_nodelay to make it possible to turn of the setting of TCP_NODELAY
7601 on TCP/IP sockets, because this apparently causes some broken clients to
7604 13. Installed revised OS/Makefile-CYGWIN and OS/os.c-cygwin (the .h file was
7605 unchanged) from the Cygwin maintainer.
7607 14. The code for -bV that shows what is in the binary showed "mbx" when maildir
7608 was supported instead of testing for mbx. Effectively a typo.
7610 15. The spa authenticator server code was not checking that the input it
7611 received was valid base64.
7613 16. The debug output line for the "set" modifier in ACLs was not showing the
7614 name of the variable that was being set.
7616 17. Code tidy: the variable type "vtype_string" was never used. Removed it.
7618 18. Previously, a reference to $sender_host_name did not cause a DNS reverse
7619 lookup on its own. Something else was needed to trigger the lookup. For
7620 example, a match in host_lookup or the need for a host name in a host list.
7621 Now, if $sender_host_name is referenced and the host name has not yet been
7622 looked up, a lookup is performed. If the lookup fails, the variable remains
7623 empty, and $host_lookup_failed is set to "1".
7625 19. Added "eqi" as a case-independent comparison operator.
7627 20. The saslauthd authentication condition could segfault if neither service
7628 nor realm was specified.
7630 21. If an overflowing value such as "2048M" was set for message_size_limit, the
7631 error message that was logged was misleading, and incoming SMTP
7632 connections were dropped. The message is now more accurate, and temporary
7633 errors are given to SMTP connections.
7635 22. In some error situations (such as 21 above) Exim rejects all SMTP commands
7636 (except RSET) with a 421 error, until QUIT is received. However, it was
7637 failing to send a response to QUIT.
7639 23. The HELO ACL was being run before the code for helo_try_verify_hosts,
7640 which made it impossible to use "verify = helo" in the HELO ACL. The HELO
7641 ACL is now run after the helo_try_verify_hosts code.
7643 24. "{MD5}" and "{SHA1}" are now recognized as equivalent to "{md5"} and
7644 "{sha1}" in the "crypteq" expansion condition (in fact the comparison is
7645 case-independent, so other case variants are also recognized). Apparently
7646 some systems use these upper case variants.
7648 25. If more than two messages were waiting for the same host, and a transport
7649 filter was specified for the transport, Exim sent two messages over the
7650 same TCP/IP connection, and then failed with "socket operation on non-
7651 socket" when it tried to send the third.
7653 26. Added Exim::debug_write and Exim::log_write for embedded Perl use.
7655 27. The extern definition of crypt16() in expand.c was not being excluded when
7656 the OS had its own crypt16() function.
7658 28. Added bounce_return_body as a new option, and bounce_return_size_limit
7659 as a preferred synonym for return_size_limit, both as an option and as an
7662 29. Added LIBS=-liconv to OS/Makefile-OSF1.
7664 30. Changed the default configuration ACL to relax the local part checking rule
7665 for addresses that are not in any local domains. For these addresses,
7666 slashes and pipe symbols are allowed within local parts, but the sequence
7667 /../ is explicitly forbidden.
7669 31. SPA server authentication was not clearing the challenge buffer before
7672 32. log_message in a "warn" ACL statement was writing to the reject log as
7673 well as to the main log, which contradicts the documentation and doesn't
7674 seem right (because no rejection is happening). So I have stopped it.
7676 33. Added Ard Biesheuvel's lookup code for accessing an Interbase database.
7677 However, I am unable to do any testing of this.
7679 34. Fixed an infelicity in the appendfile transport. When checking directories
7680 for a mailbox, to see if any needed to be created, it was accidentally
7681 using path names with one or more superfluous leading slashes; tracing
7682 would show up entries such as stat("///home/ph10", 0xFFBEEA48).
7684 35. If log_message is set on a "discard" verb in a MAIL or RCPT ACL, its
7685 contents are added to the log line that is written for every discarded
7686 recipient. (Previously a log_message setting was ignored.)
7688 36. The ${quote: operator now quotes the string if it is empty.
7690 37. The install script runs exim in order to find its version number. If for
7691 some reason other than non-existence or emptiness, which it checks, it
7692 could not run './exim', it was installing it with an empty version number,
7693 i.e. as "exim-". This error state is now caught, and the installation is
7696 38. An argument was missing from the function that creates an error message
7697 when Exim fails to connect to the socket for saslauthd authentication.
7698 This could cause Exim to crash, or give a corrupted message.
7700 39. Added isip, isip4, and isip6 to ${if conditions.
7702 40. The ACL variables $acl_xx are now saved with the message, and can be
7703 accessed later in routers, transports, and filters.
7705 41. The new lookup type nwildlsearch is like wildlsearch, except that the key
7706 strings in the file are not string-expanded.
7708 42. If a MAIL command specified a SIZE value that was too large to fit into an
7709 int variable, the check against message_size_limit failed. Such values are
7710 now forced to INT_MAX, which is around 2Gb for a 32-bit variable. Maybe one
7711 day this will have to be increased, but I don't think I want to be around
7712 when emails are that large.
7719 1. Removed HAVE_ICONV=yes from OS/Makefile-FreeBSD, since it seems that
7720 iconv() is not standard in FreeBSD.
7722 2. Change 4.21/17 was buggy and could cause stack overwriting on a system with
7723 IPv6 enabled. The observed symptom was a segmentation fault on return from
7724 the function os_common_find_running_interfaces() in src/os.c.
7726 3. In the check_special_case() function in daemon.c I had used "errno" as an
7727 argument name, which causes warnings on some systems. This was basically a
7728 typo, since it was named "eno" in the comments!
7730 4. The code that waits for the clock to tick (at a resolution of some fraction
7731 of a second) so as to ensure message-id uniqueness was always waiting for
7732 at least one whole tick, when it could have waited for less. [This is
7733 almost certainly not relevant at current processor speeds, where it is
7734 unlikely to ever wait at all. But we try to future-proof.]
7736 5. The function that sleeps for a time interval that includes fractions of a
7737 second contained a race. It did not block SIGALRM between setting the
7738 timer, and suspending (a couple of lines later). If the interval was short
7739 and the sigsuspend() was delayed until after it had expired, the suspension
7740 never ended. On busy systems this could lead to processes getting stuck for
7743 6. Some uncommon configurations may cause a lookup to happen in a queue runner
7744 process, before it forks any delivery processes. The open lookup caching
7745 mechanism meant that the open file or database connection was passed into
7746 the delivery process. The problem was that delivery processes always tidy
7747 up cached lookup data. This could cause a problem for the next delivery
7748 process started by the queue runner, because the external queue runner
7749 process does not know about the closure. So the next delivery process
7750 still has data in the lookup cache. In the case of a file lookup, there was
7751 no problem because closing a file descriptor in a subprocess doesn't affect
7752 the parent. However, if the lookup was caching a connection to a database,
7753 the connection was closed, and the second delivery process was likely to
7754 see errors such as "PGSQL: query failed: server closed the connection
7755 unexpectedly". The problem has been fixed by closing all cached lookups
7756 in a queue runner before running a delivery process.
7758 7. Compiler warning on Linux for the second argument of iconv(), which doesn't
7759 seem to have the "const" qualifier which it has on other OS. I've
7762 8. Change 4.21/2 was too strict. It is only if there are two authenticators
7763 *of the same type* (client or server) with the same public name that an
7764 error should be diagnosed.
7766 9. When Exim looked up a host name for an IP address, but failed to find the
7767 original IP address when looking up the host name (a safety check), it
7768 output the message "<ip address> does not match any IP for NULL", which was
7769 confusing, to say the least. The bug was that the host name should have
7770 appeared instead of "NULL".
7772 10. Since release 3.03, if Exim is called by a uid other than root or the Exim
7773 user that is built into the binary, and the -C or -D options is used, root
7774 privilege is dropped before the configuration file is read. In addition,
7775 logging is switched to stderr instead of the normal log files. If the
7776 configuration then re-defines the Exim user, the unprivileged environment
7777 is probably not what is expected, so Exim logs a panic warning message (but
7780 However, if deliver_drop_privilege is set, the unprivileged state may well
7781 be exactly what is intended, so the warning has been cut out in that case,
7782 and Exim is allowed to try to write to its normal log files.
7788 1. smtp_return_error_details was not giving details for temporary sender
7789 or receiver verification errors.
7791 2. Diagnose a configuration error if two authenticators have the same public
7794 3. Exim used not to create the message log file for a message until the first
7795 delivery attempt. This could be confusing when incoming messages were held
7796 for policy or load reasons. The message log file is now created at the time
7797 the message is received, and an initial "Received" line is written to it.
7799 4. The automatically generated man page for command line options had a minor
7800 bug that caused no ill effects; however, a more serious problem was that
7801 the procedure for building the man page automatically didn't always
7802 operate. Consequently, release 4.20 contains an out-of-date version. This
7803 shouldn't happen again.
7805 5. When building Exim with embedded Perl support, the script that builds the
7806 Makefile was calling 'perl' to find its compile-time parameters, ignoring
7807 any setting of PERL_COMMAND in Local/Makefile. This is now fixed.
7809 6. The freeze_tell option was not being used for messages that were frozen on
7810 arrival, either by an ACL or by local_scan().
7812 7. Added the smtp_incomplete_transaction log selector.
7814 8. After STARTTLS, Exim was not forgetting that it had advertised AUTH, so it
7815 was accepting AUTH without a new EHLO.
7817 9. Added tls_remember_esmtp to cope with YAEB. This allows AUTH and other
7818 ESMTP extensions after STARTTLS without a new EHLO, in contravention of the
7821 10. Logging of TCP/IP connections (when configured) now happens in the main
7822 daemon process instead of the child process, so that the TCP/IP connection
7823 count is more accurate (but it can never be perfect).
7825 11. The use of "drop" in a nested ACL was not being handled correctly in the
7826 outer ACL. Now, if condition failure induced by the nested "drop" causes
7827 the outer ACL verb to deny access ("accept" or "discard" after "endpass",
7828 or "require"), the connection is dropped.
7830 12. Similarly, "discard" in a nested ACL wasn't being handled. A nested ACL
7831 that yield "discard" can now be used with an "accept" or a "discard" verb,
7832 but an error is generated for any others (because I can't see a useful way
7833 to define what should happen).
7835 13. When an ACL is read dynamically from a file (or anywhere else), the lines
7836 are now processed in the same way as lines in the Exim configuration file.
7837 In particular, continuation lines are supported.
7839 14. Added the "dnslists = a.b.c!=n.n.n.n" feature.
7841 15. Added -ti meaning -t -i.
7843 16. Check for letters, digits, hyphens, and dots in the names of dnslist
7844 domains, and warn by logging if others are found.
7846 17. At least on BSD, alignment is not guaranteed for the array of ifreq's
7847 returned from GIFCONF when Exim is trying to find the list of interfaces on
7848 a host. The code in os.c has been modified to copy each ifreq to an aligned
7849 structure in all cases.
7851 Also, in some cases, the returned ifreq's were being copied to a 'struct
7852 ifreq' on the stack, which was subsequently passed to host_ntoa(). That
7853 means the last couple of bytes of an IPv6 address could be chopped if the
7854 ifreq contained only a normal sockaddr (14 bytes storage).
7856 18. Named domain lists were not supported in the hosts_treat_as_local option.
7857 An entry such as +xxxx was not recognized, and was treated as a literal
7860 19. Ensure that header lines added by a DATA ACL are included in the reject log
7861 if the ACL subsequently rejects the message.
7863 20. Upgrade the cramtest.pl utility script to use Digest::MD5 instead of just
7864 MD5 (which is deprecated).
7866 21. When testing a filter file using -bf, Exim was writing a message when it
7867 took the sender from a "From " line in the message, but it was not doing so
7868 when it took $return_path from a Return-Path: header line. It now does.
7870 22. If the contents of a "message" modifier for a "warn" ACL verb do not begin
7871 with a valid header line field name (a series of printing characters
7872 terminated by a colon, Exim now inserts X-ACL-Warn: at the beginning.
7874 23. Changed "disc" in the source to "disk" to conform to the documentation and
7875 the book and for uniformity.
7877 24. Ignore Sendmail's -Ooption=value command line item.
7879 25. When execve() failed while trying to run a command in a pipe transport,
7880 Exim was returning EX_UNAVAILABLE (69) from the subprocess. However, this
7881 could be confused with a return value of 69 from the command itself. This
7882 has been changed to 127, the value the shell returns if it is asked to run
7883 a non-existent command. The wording for the related log line suggests a
7884 non-existent command as the problem.
7886 26. If received_header_text expands to an empty string, do not add a Received:
7887 header line to the message. (Well, it adds a token one on the spool, but
7888 marks it "old" so that it doesn't get used or transmitted.)
7890 27. Installed eximstats 1.28 (addition of -nt option).
7892 28. There was no check for failure on the call to getsockname() in the daemon
7893 code. This can fail if there is a shortage of resources on the system, with
7894 ENOMEM, for example. A temporary error is now given on failure.
7896 29. Contrary to the C standard, it seems that in some environments, the
7897 equivalent of setlocale(LC_ALL, "C") is not obeyed at the start of a C
7898 program. Exim now does this explicitly; it affects the formatting of
7899 timestamps using strftime().
7901 30. If exiqsumm was given junk data, it threw up some uninitialized variable
7902 complaints. I've now initialized all the variables, to avoid this.
7904 32. Header lines added by a system filter were not being "seen" during
7905 transport-time rewrites.
7907 33. The info_callback() function passed to OpenSSL is set up with type void
7908 (*)(SSL *, int, int), as described somewhere. However, when calling the
7909 function (actually a macro) that sets it up, the type void(*)() is
7910 expected. I've put in a cast to prevent warnings from picky compilers.
7912 34. If a DNS black list lookup found a CNAME record, but there were no A
7913 records associated with the domain it pointed at, Exim crashed.
7915 35. If a DNS black list lookup returned more than one A record, Exim ignored
7916 all but the first. It now scans all returned addresses if a particular IP
7917 value is being sought. In this situation, the contents of the
7918 $dnslist_value variable are a list of all the addresses, separated by a
7921 36. Tightened up the rules for host name lookups using reverse DNS. Exim used
7922 to accept a host name and all its aliases if the forward lookup for any of
7923 them yielded the IP address of the incoming connection. Now it accepts only
7924 those names whose forward lookup yields the correct IP address. Any other
7925 names are discarded. This closes a loophole whereby a rogue DNS
7926 administrator could create reverse DNS records to break through a
7927 wildcarded host restriction in an ACL.
7929 37. If a user filter or a system filter that ran in a subprocess used any of
7930 the numerical variables ($1, $2 etc), or $thisaddress, in a pipe command,
7931 the wrong values were passed to the pipe command ($thisaddress had the
7932 value of $0, $0 had the value of $1, etc). This bug was introduced by
7933 change 4.11/101, and not discovered because I wrote an inadequate test. :-(
7935 38. Improved the line breaking for long SMTP error messages from ACLs.
7936 Previously, if there was no break point between 40 and 75 characters, Exim
7937 left the rest of the message alone. Two changes have been made: (a) I've
7938 reduced the minimum length to 35 characters; (b) if it can't find a break
7939 point between 35 and 75 characters, it looks ahead and uses the first one
7940 that it finds. This may give the occasional overlong line, but at least the
7941 remaining text gets split now.
7943 39. Change 82 of 4.11 was unimaginative. It assumed the limit on the number of
7944 file descriptors might be low, and that setting 1000 would always raise it.
7945 It turns out that in some environments, the limit is already over 1000 and
7946 that lowering it causes trouble. So now Exim takes care not to decrease it.
7948 40. When delivering a message, the value of $return_path is set to $sender_
7949 address at the start of routing (routers may change the value). By an
7950 oversight, this default was not being set up when an address was tested by
7951 -bt or -bv, which affected the outcome if any router or filter referred to
7954 41. The idea of the "warn" ACL verb is that it adds a header or writes to the
7955 log only when "message" or "log_message" are set. However, if one of the
7956 conditions was an address verification, or a call to a nested ACL, the
7957 messages generated by the underlying test were being passed through. This
7958 no longer happens. The underlying message is available in $acl_verify_
7959 message for both "message" and "log_message" expansions, so it can be
7960 passed through if needed.
7962 42. Added RFC 2047 interpretation of header lines for $h_ expansions, with a
7963 new expansion $bh_ to give the encoded byte string without charset
7964 translation. Translation happens only if iconv() is available; HAVE_ICONV
7965 indicates this at build time. HEADERS_CHARSET gives the charset to
7966 translate to; headers_charset can change it in the configuration, and
7967 "headers charset" can change it in an individual filter file.
7969 43. Now that we have a default RFC 2047 charset (see above), the code in Exim
7970 that creates RFC 2047 encoded "words" labels them as that charset instead
7971 of always using iso-8859-1. The cases are (i) the explicit ${rfc2047:
7972 expansion operator; (ii) when Exim creates a From: line for a local
7973 message; (iii) when a header line is rewritten to include a "phrase" part.
7975 44. Nasty bug in exiqsumm: the regex to skip already-delivered addresses was
7976 buggy, causing it to skip the first lines of messages whose message ID
7977 ended in 'D'. This would not have bitten before Exim release 4.14, because
7978 message IDs were unlikely to end in 'D' before then. The effect was to have
7979 incorrect size information for certain domains.
7981 45. #include "config.h" was missing at the start of the crypt16.c module. This
7982 caused trouble on Tru64 (aka OSF1) systems, because HAVE_CRYPT16 was not
7985 46. If there was a timeout during a "random" callout check, Exim treated it as
7986 a failure of the random address, and carried on sending RSET and the real
7987 address. If the delay was just some slowness somewhere, the response to the
7988 original RCPT would be taken as a response to RSET and so on, causing
7989 mayhem of various kinds.
7991 47. Change 50 for 4.20 was a heap of junk. I don't know what I was thinking
7992 when I implemented it. It didn't allow for the fact that some option values
7993 may legitimately be negative (e.g. size_addition), and it didn't even do
7994 the right test for positive values.
7996 48. Domain names in DNS records are case-independent. Exim always looks them up
7997 in lower case. Some resolvers return domain names in exactly the case they
7998 appear in the zone file, that is, they may contain uppercase letters. Not
7999 all resolvers do this - some return always lower case. Exim was treating a
8000 change of case by a resolver as a change of domain, similar to a widening
8001 of a domain abbreviation. This triggered its re-routing code and so it was
8002 trying to route what was effectively the same domain again. This normally
8003 caused routing to fail (because the router wouldn't handle the domain
8004 twice). Now Exim checks for this case specially, and just changes the
8005 casing of the domain that it ultimately uses when it transmits the message
8008 49. Added Sieve (RFC 3028) support, courtesy of Michael Haardt's contributed
8011 50. If a filter generated a file delivery with a non-absolute name (possible if
8012 no home directory exists for the router), the forbid_file option was not
8015 51. Added '&' feature to dnslists, to provide bit mask matching in addition to
8016 the existing equality matching.
8018 52. Exim was using ints instead of ino_t variables in some places where it was
8019 dealing with inode numbers.
8021 53. If TMPDIR is defined in Local/Makefile (default in src/EDITME is
8022 TMPDIR="/tmp"), Exim checks for the presence of an environment variable
8023 called TMPDIR, and if it finds it is different, it changes its value.
8025 54. The smtp_printf() function is now made available to local_scan() so
8026 additional output lines can be written before returning. There is also an
8027 smtp_fflush() function to enable the detection of a dropped connection.
8028 The variables smtp_input and smtp_batched_input are exported to
8031 55. Changed the default runtime configuration: the message "Unknown user"
8032 has been removed from the ACL, and instead placed on the localuser router,
8033 using the cannot_route_message feature. This means that any verification
8034 failures that generate their own messages won't get overridden. Similarly,
8035 the "Unrouteable address" message that was in the ACL for unverifiable
8036 relay addresses has also been removed.
8038 56. Added hosts_avoid_esmtp to the smtp transport.
8040 57. The exicyclog script was not checking for the esoteric option
8041 CONFIGURE_FILE_USE_EUID in the Local/Makefile. It now does this, but it
8042 will work only if exicyclog is run under the appropriate euid.
8044 58. Following a discussion on the list, the rules by which Exim recognises line
8045 endings on incoming messages have been changed. The -dropcr and drop_cr
8046 options are now no-ops, retained only for backwards compatibility. The
8047 following line terminators are recognized: LF CRLF CR. However, special
8048 processing applies to CR:
8050 (i) The sequence CR . CR does *not* terminate an incoming SMTP message,
8051 nor a local message in the state where . is a terminator.
8053 (ii) If a bare CR is encountered in a header line, an extra space is added
8054 after the line terminator so as not to end the header. The reasoning
8055 behind this is that bare CRs in header lines are most likely either
8056 to be mistakes, or people trying to play silly games.
8058 59. The size of a message, as listed by "-bp" or in the Exim monitor window,
8059 was being incorrectly given as 18 bytes larger than it should have been.
8060 This is a VOB (very old bug).
8062 60. This may never have affected anything current, but just in case it has:
8063 When the local host is found other than at the start of a list of hosts,
8064 the local host, those with the same MX, and any that follow, are discarded.
8065 When the list in question was part of a longer list of hosts, the following
8066 hosts (not currently being processed) were also being discarded. This no
8067 longer happens. I'm not sure if this situation could ever has previously
8070 61. Added the "/MX" feature to lists of hosts in the manualroute and query
8073 62. Whenever Exim generates a new message, it now adds an Auto-Submitted:
8074 header. This is something that is recommended in a new Internet Draft, and
8075 is something that is documented as being done by Sendmail. There are two
8076 possible values. For messages generated by the autoreply transport, Exim
8079 Auto-Submitted: auto-replied
8081 whereas for all other generated messages (e.g. bounces) it adds
8083 Auto-Submitted: auto-generated
8085 63. The "personal" condition in filters now includes a test for the
8086 Auto-Submitted: header. If it contains the string "auto-" the message it
8087 not considered personal.
8089 64. Added rcpt_include_affixes as a generic transport option.
8091 65. Added queue_only_override (default true).
8093 66. Added the syslog_duplication option.
8095 67. If what should have been the first header line of a message consisted of
8096 a space followed by a colon, Exim was mis-interpreting it as a header line.
8097 It isn't of course - it is syntactically invalid and should therefore be
8098 treated as the start of the message body. The misbehaviour could have
8099 caused a number of strange effects, including loss of data in subsequent
8100 header lines, and spool format errors.
8102 68. Formerly, the AUTH parameter on a MAIL command was trusted only if the
8103 client host had authenticated. This control can now be exercised by an ACL
8104 for more flexibility.
8106 69. By default, callouts do not happen when testing with -bh. There is now a
8107 variant, -bhc, which does actually run the callout code, including
8108 consulting and updating the callout cache.
8110 70. Added support for saslauthd authentication, courtesy of Alexander
8113 71. If statvfs() failed on the spool or log directories while checking their
8114 size for availability, Exim confusingly gave the error "space shortage".
8115 Furthermore, in debugging mode it crashed with a floating point exception.
8116 These checks are done if check_{spool,log}_{space,inodes} are set, and when
8117 an SMTP message arrives with SIZE= on the MAIL command. As this is a really
8118 serious problem, Exim now writes to the main and panic logs when this
8119 happens, with details of the failure. It then refuses to accept the
8120 incoming message, giving the message "spool directory problem" or "log
8121 directory problem" with a 421 code for SMTP messages.
8123 72. When Exim is about to re-exec itself, it ensures that the file descriptors
8124 0, 1, and 2 exist, because some OS complain for execs without them (see
8125 ChangeLog 4.05/30). If necessary, Exim opens /dev/null to use for these
8126 descriptors. However, the code omitted to check that the open succeeded,
8127 causing mysterious errors if for some reason the permissions on /dev/null
8128 got screwed. Now Exim writes a message to the main and panic logs, and
8129 bombs out if it can't open /dev/null.
8131 73. Re-vamped the way daemon_smtp_port, local_interfaces, and -oX work and
8132 interact so that it is all more flexible. It is supposed to remain
8133 backwards compatible. Also added extra_local_interfaces.
8135 74. Invalid data sent to a SPA (NTLM) server authenticator could cause the code
8136 to bomb out with an assertion failure - to the client this appears as a
8137 connection drop. This problem occurs in the part of the code that was taken
8138 from the Samba project. Fortunately, the assertion is in a very simple
8139 function, so I have fixed this by reproducing the function inline in the
8140 one place where it is called, and arranging for authentication to fail
8141 instead of killing the process with assert().
8143 75. The SPA client code was not working when the server requested OEM rather
8144 than Unicode encoding.
8146 76. Added code to make require_files with a specific uid setting more usable in
8147 the case where statting the file as root fails - usually a non-root-mounted
8148 NFS file system. When this happens and the failure is EACCES, Exim now
8149 forks a subprocess and does the per-uid checking as the relevant uid.
8151 77. Added process_log_path.
8153 78. If log_file_path was not explicitly set, a setting of check_log_space or
8154 check_log_inodes was ignored.
8156 79. If a space check for the spool or log partitions fails, the incident is now
8157 logged. Of course, in the latter case the data may get lost...
8159 80. Added the %p formatting code to string_format() so that it can be used to
8160 print addresses in debug_print(). Adjusted all the address printing in the
8161 debugging in store.c to use %p rather than %d.
8163 81. There was a concern that a line of code in smtp_in.c could overflow a
8164 buffer if a HELO/EHLO command was given followed by 500 or so spaces. As
8165 initially expressed, the concern was not well-founded, because trailing
8166 spaces are removed early. However, if the trailing spaces were followed by
8167 a NULL, they did not get removed, so the overflow was possible. Two fixes
8170 (a) I re-wrote the offending code in a cleaner fashion.
8171 (b) If an incoming SMTP command contains a NULL character, it is rejected
8174 82. When Exim changes uid/gid to the Exim user at daemon start time, it now
8175 runs initgroups(), so that if the Exim user is in any additional groups,
8176 they will be used during message reception.
8182 The change log for 4.20 and earlier releases has been archived.
git://git.exim.org / exim.git / blob