1 This document describes *changes* to previous versions, that might
2 affect Exim's operation, with an unchanged configuration file. For new
3 options, and new features, see the NewStuff file next to this ChangeLog.
8 JH/01 Move the wait-for-next-tick (needed for unique messmage IDs) from
9 after reception to before a subsequent reception. This should
10 mean slightly faster delivery, and also confirmation of reception
13 JH/02 Move from using the pcre library to pcre2. The former is no longer
14 being developed or supported (by the original developer).
16 JH/03 Constification work in the filters module required a major version
17 bump for the local-scan API. Specifically, the "headers_charset"
18 global which is visible via the API is now const and may therefore
19 not be modified by local-scan code.
21 JH/04 Fix ClamAV TCP use under FreeBSD. Previously the OS-specific shim for
22 sendfile() didi not account for the way the ClamAV driver code called it.
24 JH/05 Bug 2819: speed up command-line messages being read in. Previously a
25 time check was being done for every character; replace that with one
28 JH/06 Bug 2815: Fix ALPN sent by server under OpenSSL. Previously the string
29 sent was prefixed with a length byte.
31 JH/07 Change the SMTP feature name for pipelining connect to be compliant with
32 RFC 5321. Previously Dovecot (at least) would log errors during
35 JH/08 Remove stripping of the binaries from the FreeBSD build. This was added
36 in 4.61 without a reason logged. Binaries will be bigger, which might
37 matter on diskspace-constrained systems, but debug is easier.
39 JH/09 Fix macro-definition during "-be" expansion testing. The move to
40 write-protected store for macros had not accounted for these runtime
41 additions; fix by removing this protection for "-be" mode.
43 JH/10 Convert all uses of select() to poll(). FreeBSD 12.2 was found to be
44 handing out large-numbered file descriptors, violating the usual Unix
45 assumption (and required by Posix) that the lowest possible number will be
46 allocated by the kernel when a new one is needed. In the daemon, and any
47 child procesees, values higher than 1024 (being bigger than FD_SETSIZE)
48 are not useable for FD_SET() [and hence select()] and overwrite the stack.
49 Assorted crashes happen.
51 JH/11 Fix use of $sender_host_name in daemon process. When used in certain
52 main-section options or in a connect ACL, the value from the first ever
53 connection was never replaced for subsequent connections. Found by
56 JH/12 Bug 2838: Fix for i32lp64 hard-align platforms. Found for SPARC Linux,
57 though only once PCRE2 was introduced: the memory accounting used under
58 debug offset allocations by an int, giving a hard trap in early startup.
59 Change to using a size_t. Debug and fix by John Paul Adrian Glaubitz.
61 JH/13 Bug 2845: Fix handling of tls_require_ciphers for OpenSSL when a value
62 with underbars is given. The write-protection of configuration introduced
63 in 4.95 trapped when normalisation was applied to an option not needing
66 JH/14 Bug 1895: TLS: Deprecate RFC 5114 Diffie-Hellman parameters.
68 JH/15 Fix a resource leak in *BSD. An off-by-one error resulted in the daemon
69 failing to close the certificates directory, every hour or any time it
72 JH/16 Debugging initiated by an ACL control now continues through into routing
73 and transport processes, when delivery is immediate. Previously debugging
74 stopped any time Exim re-execs.
76 JH/17 The "expand" debug selector now gives more detail, specifically on the
77 result of expansion operators and items.
79 JH/18 Bug 2751: Fix include_directory in redirect routers. Previously a
80 bad comparison between the option value and the name of the file to
81 be included was done, and a mismatch was wrongly identified.
82 4.88 to 4.95 are affected.
84 JH/19 Support for Berkeley DB versions 1 and 2 is withdrawn.
86 JH/20 When built with NDBM for hints DB's check for nonexistence of a name
87 supplied as the db file-pair basename. Previously, if a directory
88 path was given, for example via the autoreply "once" option, the DB
89 file.pag and file.dir files would be created in that directory's
92 JH/21 Remove the "allow_insecure_tainted_data" main config option and the
93 "taint" log_selector. These were previously deprecated.
95 JH/22 Fix static address-list lookups to properly return the matched item.
96 Previously only the domain part was returned.
98 JH/23 Bug 2864: FreeBSD: fix transport hang after 4xx/5xx response. Previously
99 the call into OpenSSL to send a TLS Close was being repeated; this
100 resulted in the library waiting for the peer's Close. If that was never
101 sent we waited forever. Fix by tracking send calls.
103 JH/24 The ${run} expansion item now expands its command string elements after
104 splitting. Previously it was before; the new ordering makes handling
105 zero-length arguments simpler. The old ordering can be obtained by
106 appending a new option "preexpand", after a comma, to the "run".
108 JH/25 Taint-check exec arguments for transport-initiated external processes.
109 Previously, tainted values could be used. This affects "pipe", "lmtp" and
110 "queryprogram" transport, transport-filter, and ETRN commands.
111 The ${run} expansion is also affected: in "preexpand" mode no part of
112 the command line may be tainted, in default mode the executable name
119 JH/01 Bug 1329: Fix format of Maildir-format filenames to match other mail-
120 related applications. Previously an "H" was used where available info
121 says that "M" should be, so change to match.
123 JH/02 Bug 2587: Fix pam expansion condition. Tainted values are commonly used
124 as arguments, so an implementation trying to copy these into a local
125 buffer was taking a taint-enforcement trap. Fix by using dynamically
126 created buffers. Similar fix for radius expansion condition.
128 JH/03 Bug 2586: Fix listcount expansion operator. Using tainted arguments is
129 reasonable, eg. to count headers. Fix by using dynamically created
130 buffers rather than a local. Do similar fixes for ACL actions "dcc",
131 "log_reject_target", "malware" and "spam"; the arguments are expanded
132 so could be handling tainted values.
134 JH/04 Bug 2590: Fix -bi (newaliases). A previous code rearrangement had
135 broken the (no-op) support for this sendmail command. Restore it
136 to doing nothing, silently, and returning good status.
138 JH/05 Bug 2593: Fix "vacation" in Exim filter. Previously, when a "once"
139 record path was given (or the default used) without a leading directory
140 path, an error occurred on trying to open it. Use the transport's working
143 JH/06 Bug 2594: Change the name used for certificate name checks in the smtp
144 transport. Previously it was the name on the DNS A-record; use instead
145 the head of the CNAME chain leading there (if there is one). This seems
146 to align better with RFC 6125.
148 JH/07 Bug 2597: Fix a resource leak. Using a lookup in obtaining a value for
149 smtp_accept_max_per_host allocated resources which were not released
150 when the limit was exceeded. This eventually crashed the daemon. Fix
151 by adding a release action in that path.
153 JH/08 Bug 2598: Fix verify ACL condition. The options for the condition are
154 expanded; previously using tainted values was rejected. Fix by using
155 dynamically-created buffers.
157 JH/09 Relax restrictions on ACL verify condition needing access to message
158 headers. Previously they were only permitted in data and non-smtp ACLs;
159 permit also mime, dkim, prdr quit and notquit. Applies to header-syntax,
160 not_blind, header_sender and header_names_ascii verification.
162 JH/10 Bug 2603: Fix coding of string copying to only evaluate arguments once.
163 Previously a macro used one argument twice; when called with the
164 argument as an expression having side-effects, incorrect operation
165 resulted. Use an inlineable function.
167 JH/11 Bug 2604: Fix request to cutthrough-deliver when a connection is already
168 held open for a verify callout. Previously this wan not accounted for
169 and a corrupt onward SMTP conversation resulted.
171 JH/12 Bug 2607: Fix the ${srs_encode } expansion to handle quoted local_parts.
172 Previously they were embedded naively in the constructed address; when
173 needed, strip the quoting and quote the entire local_part.
174 Also make the inbound_srs expansion condition handle quoting.
176 JH/13 Fix dsearch "subdir" filter to ignore ".". Previously only ".." was
177 excluded, not matching the documentation.
179 JH/14 Bug 2606: Fix a segfault in sqlite lookups. When no, or a bad, filename
180 was given for the sqlite_dbfile a trap resulted.
182 JH/15 Bug 2620: Fix "spam" ACL condition. Previously, tainted values for the
183 "name" argument resulted in a trap. There is no reason to disallow such;
184 this was a coding error.
186 JH/16 Bug 2615: Fix pause during message reception, on systems that have been
187 suspended/resumed. The Linux CLOCK_MONOTONIC does not account for time
188 spent suspended, ignoring the POSIX definition. Previously we assumed
189 it did and a constant offset from real time could be used as a correction.
190 Change to using the same clock source for the start-of-message and the
191 post-message next-tick-wait. Also change to using CLOCK_BOOTTIME if it
192 exists, just to get a clock slightly more aligned to reality.
194 JH/17 Bug 2295: Fix DKIM signing to always semicolon-terminate. Although the
195 RFC says it is optional some validators care. The missing char was not
196 intended but triggered by a line-wrap alignment. Discovery and fix by
197 Guillaume Outters, hacked on by JH.
199 JH/18 Bug 2617: Fix a taint trap in parse_fix_phrase(). Previously when the
200 name being quoted was tainted a trap would be taken. Fix by using
201 dynamically created buffers. The routine could have been called by a
202 rewrite with the "h" flag, by using the "-F" command-line option, or
203 by using a "name=" option on a control=submission ACL modifier.
205 JH/19 SPF: change the Authentication-Results expansion component to give
206 smtp.helo when the sender domain is empty. Previously it gave
209 JH/20 Bug 2631: ACL dnslist conditions now ignore and log any lookups returns
210 not in 127.0.0.0/8 to help in spotting list domains taken over by a
211 domain-parking registrar.
213 JH/21 Bug 2630: Fix eol-replacement string for the ${readsocket } expansion.
214 Previously when a whitespace character was specified it was not inserted
215 after removing the newline.
217 JH/22 Bug 2265: Force SNI usage for smtp transport DANE'd connections, to be
218 the domain part of the recipient address. This overrides any tls_sni
219 option set, which was previously used.
221 JH/23 Logging: with the +tls_sni log_selector, do not wrap the received SNI
224 JH/24 Bug 2634: Fix a taint trap seen on NetBSD: the testing coded for
225 is_tainted() had an off-by-one error in the overenthusiastic direction.
226 Find and fix by Gavan. Although NetBSD is not a supported platform for
227 4.94 this bug could affect other platforms.
229 PP/01 Fix default prime selection to be consistent.
230 One path used ike23 still, instead of exim.dev.20160529.3; now both
231 execution flows will use the same DH primes (currently
232 exim.dev.20160529.3).
234 JH/25 OpenSSL: Fix back-compatibility behaviour surrounding tls_certificates
235 option in smtp transport, to match the documentation. Previously
236 verification was not being done in some cases where it should have been.
238 JH/26 Bug 2646: fix a memory usage issue in ldap lookups. Previously, when more
239 than one server was defined and depending on the platform memory layout
240 details, an internal consistency trap could be hit while walking the list
243 JH/27 Bug 2648: fix the passing of an authenticator public-name through spool
244 files. The value is used by the authresults expansion item. Previously
245 if this was used in a router or transport, a crash could result.
247 JH/28 Fix spurious logging of select error. Some platforms, notably FreeBSD,
248 have a sufficient incidence of EINTR returns from select that an
249 interaction with other operations done by the main daemon loop exposed
250 a bug in the error-handling. This was benign apart from the log
253 JH/29 Bug 2675: add outgoing-interface I= element to deferred "==" log lines,
254 for consistency with delivered "=>" and failed "**" lines. While we're
255 there, handle PRX and TFO.
257 JH/30 Bug 2677: fix matching of long addresses. Since 4.93 a limit of 256 was
258 applied. This resulted, if any header-line rewrite rules were configured,
259 in a panic-log triggerable by sending a message with a long address in
260 a header. Fix by increasing the arbitrary limit to larger than a single
261 (dewrapped) 5322 header line maximum size.
263 JH/31 The ESMTP option name advertised for the SUPPORT_EARLY_PIPE build option
264 is changed from X_PIPE_CONNECT to PIPE_CONNECT. This is in line with
265 RFC 6648 which deprecates X- options in protocols as a general practice.
266 Changeover between the implementations is handled by the mechanisms
269 JH/32 Bug 2599: fix delay of delivery to a local address where there is also
270 a remote which uses callout/hold. Previously the local was queued.
272 JH/33 Fix a taint trap in the ${listextract } expansion when the source data
275 JH/34 Fix the placement of a multiple-message delivery marker in the delivery
276 log line. The asterisk is now consistently appended to the remote IP
277 (and port, if given), and will also be provided on defer and fail log
278 lines. Previously it could be placed on the local IP if that was being
279 logged, and was only provided on delivery lines.
281 JH/35 Bug 2343: Harden exim_tidydb against corrupt wait- files.
283 JH/36 Bug 2687: Fix interpretation of multiple ^ chars in a plaintext
284 authenticator client_send option. Previously the next char, after a pair
285 was collapsed, was taken verbatim (so ^^^foo became ^^foo; ^^^^foo became
286 ^^\x00foo). Fixed to get ^\x00foo and ^^foo respectively to match the
287 documentation. There is still no way to get a leading ^ immediately
288 after a NUL (ie. for the password of a PLAIN method authenticator.
290 JH/37 Enforce the expected size, for fixed-size records read from hints-DB
291 files. For bad sizes read, delete the record and whine to paniclog.
293 JH/38 When logging an AUTH failure, as server, do not include sensitive
294 information. Previously, the credentials would be included if given
295 as part of the AUTH command line and an ACL denied authentication.
297 JH/39 Bug 2691: fix $local_part_data. When the matching list element
298 referred to a file, bad data was returned. This likely also affected
301 JH/40 The gsasl authenticator now supports caching of the salted password
302 generated by the client-side implementation. This required the addition
303 of a new variable: $auth4.
305 JH/41 Fix daemon SIGHUP on FreeBSD. Previously, a named socket for IPC was
306 left undeleted; the attempt to re-create it then failed - resulting in
307 the usual "SIGHUP tp have daemon reload configuration" to not work.
308 This affected any platform not supporting "abstract" Unix-domain
309 sockets (i.e. not Linux).
311 JH/42 Bug 2693: Harden against a peer which reneges on a 452 "too many
312 recipients" response to RCPT in a later response, with a 250. The
313 previous coding assumed this would not happen, and under PIPELINING
314 would result in both lost and duplicate recipients for a message.
316 JH/43 Bug 2694: Fix weighted distribution of work to multiple spamd servers.
317 Previously the weighting was incorrectly applied. Similar fix for socks
318 proxies. Found and fixed by Heiko Schlichting.
320 JH/44 Bug 2701: Fix list-expansion of dns_ipv4_lookup. Previously, it did
321 not handle sub-lists included using the +namedlist syntax. While
322 investigating, the same found for dns_trust_aa, dns_again_means_nonexist,
323 dnssec_require_domains, dnssec_request_domains, srv_fail_domains,
326 JH/45 Use a (new) separate store pool-pair for DKIM verify working data.
327 Previously the permanent pool was used, so the sore could not be freed.
328 This meant a connection with many messages would use continually-growing
331 JH/46 Use an exponentially-increasing block size when malloc'ing store. Do it
332 per-pool so as not to waste too much space. Previously a constant size
333 was used which resulted in O(n^2) behaviour; now we get O(n log n) making
334 DOS attacks harder. The cost is wasted memory use in the larger blocks.
336 JH/47 Use explicit alloc/free for DNS lookup workspace. This permits using the
337 same space repeatedly, and a smaller process footprint.
339 JH/48 Use a less bogus-looking filename for a temporary used for DH-parameters
340 for GnuTLS. Previously the name started "%s" which, while not a bug,
341 looked as if if might be one.
343 JH/49 Bug 2710: when using SOCKS for additional messages after the first (a
344 "continued connection") make the $proxy_* variables available. Previously
345 the information was not passed across the exec() call for subsequent
346 transport executions. This also mean that the log lines for the
347 messages can show the proxy information.
349 JH/50 Bug 2672: QT elements in log lines, unless disabled, now exclude the
350 receive time. With modern systems the difference is significant.
351 The historical behaviour can be restored by disabling (a new) log_selector
352 "queue_time_exclusive".
354 JH/51 Taint-check ACL line. Previously, only filenames (for out-of-line ACL
355 content) were specifically tested for. Now, also cover expansions
356 resulting in ACL names and inline ACL content.
358 JH/52 Fix ${ip6norm:} operator. Previously, any trailing line text was dropped,
359 making it unusable in complex expressions.
361 JH/53 Bug 2743: fix immediate-delivery via named queue. Previously this would
362 fail with a taint-check on the spoolfile name, and leave the message
365 HS/01 Enforce absolute PID file path name.
367 HS/02 Handle SIGINT as we handle SIGTERM: terminate the Exim process.
369 PP/01 Add a too-many-bad-recipients guard to the default config's RCPT ACL.
371 PP/02 Bug 2643: Correct TLS DH constants.
372 A missing NUL termination in our code-generation tool had led to some
373 incorrect Diffie-Hellman constants in the Exim source.
374 Reported by kylon94, code-gen tool fix by Simon Arlott.
376 PP/03 Impose security length checks on various command-line options.
377 Fixes CVE-2020-SPRSS reported by Qualys.
379 PP/04 Fix Linux security issue CVE-2020-SLCWD and guard against PATH_MAX
380 better. Reported by Qualys.
382 PP/05 Fix security issue CVE-2020-PFPSN and guard against cmdline invoker
383 providing a particularly obnoxious sender full name.
386 PP/06 Fix CVE-2020-28016 (PFPZA): Heap out-of-bounds write in parse_fix_phrase()
388 PP/07 Refuse to allocate too little memory, block negative/zero allocations.
391 PP/08 Change default for recipients_max from unlimited to 50,000.
393 PP/09 Fix security issue with too many recipients on a message (to remove a
394 known security problem if someone does set recipients_max to unlimited,
395 or if local additions add to the recipient list).
396 Fixes CVE-2020-RCPTL reported by Qualys.
398 PP/10 Fix security issue in SMTP verb option parsing
399 Fixes CVE-2020-EXOPT reported by Qualys.
401 PP/11 Fix security issue in BDAT state confusion.
402 Ensure we reset known-good where we know we need to not be reading BDAT
403 data, as a general case fix, and move the places where we switch to BDAT
404 mode until after various protocol state checks.
405 Fixes CVE-2020-BDATA reported by Qualys.
407 HS/03 Die on "/../" in msglog file names
409 QS/01 Creation of (database) files in $spool_dir: only uid=0 or the uid of
410 the Exim runtime user are allowed to create files.
412 QS/02 PID file creation/deletion: only possible if uid=0 or uid is the Exim
415 QS/03 When reading the output from interpreted forward files we do not
416 pass the pipe between the parent and the interpreting process to
417 executed child processes (if any).
419 QS/04 Always die if requested from internal logging, even is logging is
422 JH/54 DMARC: recent versions of the OpenDMARC library appear to have broken
423 the API; compilation noo longer completes with DMARC support included.
424 This affects 1.4.1-1 on Fedora 33 (1.3.2-3 is functional); and has
425 been reported on other platforms.
427 JH/55 TLS: as server, reject connections with ALPN indicating non-smtp use.
429 JH/56 Make the majority of info read from config files readonly, for defence-in-
430 depth against exploits. Suggestion by Qualys.
431 Not supported on Solaris 10.
433 JH/57 Fix control=fakreject for a custom message containing tainted data.
434 Previously this resulted in a log complaint, due to a re-expansion present
435 since fakereject was originally introduced.
437 JH/58 GnuTLS: Fix certextract expansion. If a second modifier after a tag
438 modifier was given, a loop resulted.
440 JH/59 DKIM: Fix small-message verification under TLS with chunking. If a
441 pipelined SMTP command followed the BDAT LAST then it would be
442 incorrectly treated as part of the message body, causing a verification
445 JH/60 Bug 2805: Fix logging of domain-literals in Message_ID: headers. They
446 require looser validation rules than those for 821-level addresses,
447 which only permit IP addresses.
453 JH/01 Avoid costly startup code when not strictly needed. This reduces time
454 for some exim process initialisations. It does mean that the logging
455 of TLS configuration problems is only done for the daemon startup.
457 JH/02 Early-pipelining support code is now included unless disabled in Makefile.
459 JH/03 DKIM verification defaults no long accept sha1 hashes, to conform to
460 RFC 8301. They can still be enabled, using the dkim_verify_hashes main
463 JH/04 Support CHUNKING from an smtp transport using a transport_filter, when
464 DKIM signing is being done. Previously a transport_filter would always
465 disable CHUNKING, falling back to traditional DATA.
467 JH/05 Regard command-line recipients as tainted.
469 JH/06 Bug 340: Remove the daemon pid file on exit, when due to SIGTERM.
471 JH/07 Bug 2489: Fix crash in the "pam" expansion condition. It seems that the
472 PAM library frees one of the arguments given to it, despite the
473 documentation. Therefore a plain malloc must be used.
475 JH/08 Bug 2491: Use tainted buffers for the transport smtp context. Previously
476 on-stack buffers were used, resulting in a taint trap when DSN information
477 copied from a received message was written into the buffer.
479 JH/09 Bug 2493: Harden ARC verify against Outlook, whick has been seen to mix
480 the ordering of its ARC headers. This caused a crash.
482 JH/10 Bug 2492: Use tainted memory for retry record when needed. Previously when
483 a new record was being constructed with information from the peer, a trap
486 JH/11 Bug 2494: Unset the default for dmarc_tld_file. Previously a naiive
487 installation would get error messages from DMARC verify, when it hit the
488 nonexistent file indicated by the default. Distros wanting DMARC enabled
489 should both provide the file and set the option.
490 Also enforce no DMARC verification for command-line sourced messages.
492 JH/12 Fix an uninitialised flag in early-pipelining. Previously connections
493 could, depending on the platform, hang at the STARTTLS response.
495 JH/13 Bug 2498: Reset a counter used for ARC verify before handling another
496 message on a connection. Previously if one message had ARC headers and
497 the following one did not, a crash could result when adding an
498 Authentication-Results: header.
500 JH/14 Bug 2500: Rewind some of the common-coding in string handling between the
501 Exim main code and Exim-related utities. The introduction of taint
502 tracking also did many adjustments to string handling. Since then, eximon
503 frequently terminated with an assert failure.
505 JH/15 When PIPELINING, synch after every hundred or so RCPT commands sent and
506 check for 452 responses. This slightly helps the inefficieny of doing
507 a large alias-expansion into a recipient-limited target. The max_rcpt
508 transport option still applies (and at the current default, will override
509 the new feature). The check is done for either cause of synch, and forces
510 a fast-retry of all 452'd recipients using a new MAIL FROM on the same
511 connection. The new facility is not tunable at this time.
513 JH/16 Fix the variables set by the gsasl authenticator. Previously a pointer to
514 library live data was being used, so the results became garbage. Make
515 copies while it is still usable.
517 JH/17 Logging: when the deliver_time selector ise set, include the DT= field
518 on delivery deferred (==) and failed (**) lines (if a delivery was
519 attemtped). Previously it was only on completion (=>) lines.
521 JH/18 Authentication: the gsasl driver not provides the $authN variables in time
522 for the expansion of the server_scram_iter and server_scram_salt options.
524 WB/01 SPF: DNS lookups for the obsolete SPF RR type done by the libspf2 library
525 are now specifically given a NO_DATA response without hitting the system
526 resolver. The library goes on to do the now-standard TXT lookup.
527 Use of dnsdb lookups is not affected.
529 JH/19 Bug 2507: Modules: on handling a dynamic-module (lookups) open failure,
530 only retrieve the errormessage once. Previously two calls to dlerror()
531 were used, and the second one (for mainlog/paniclog) retrieved null
534 JH/20 Taint checking: disallow use of tainted data for
535 - the appendfile transport file and directory options
536 - the pipe transport command
537 - the autoreply transport file, log and once options
538 - file names used by the redirect router (including filter files)
540 - paths used by single-key lookups
541 Previously this was permitted.
543 JH/21 Bug 2501: Fix init call in the heimdal authenticator. Previously it
544 adjusted the size of a major service buffer; this failed because the
545 buffer was in use at the time. Change to a compile-time increase in the
546 buffer size, when this authenticator is compiled into exim.
548 JH/22 Taint-checking: move to safe-mode taint checking on all platforms. The
549 previous fast-mode was untenable in the face of glibs using mmap to
550 support larger malloc requests.
552 PP/01 Update the openssl_options possible values through OpenSSL 1.1.1c.
553 New values supported, if defined on system where compiled:
554 allow_no_dhe_kex, cryptopro_tlsext_bug, enable_middlebox_compat,
555 no_anti_replay, no_encrypt_then_mac, prioritize_chacha, tlsext_padding
557 JH/23 Performance improvement in the initial phase of a two-pass queue run. By
558 running a limited number of proceses in parallel, a benefit is gained. The
559 amount varies with the platform hardware and load. The use of the option
560 queue_run_in_order means we cannot do this, as ordering becomes
563 JH/24 Bug 2524: fix the cyrus_sasl auth driver gssapi usage. A previous fix
564 had introduced a string-copy (for ensuring NUL-termination) which was not
565 appropriate for that case, which can include embedded NUL bytes in the
566 block of data. Investigation showed the copy to actually be needless, the
567 data being length-specified.
569 JH/25 Fix use of concurrent TLS connections under GnuTLS. When a callout was
570 done during a receiving connection, and both used TLS, global info was
571 used rather than per-connection info for tracking the state of data
572 queued for transmission. This could result in a connection hang.
574 JH/26 Fix use of the SIZE parameter on MAIL commands, on continued connections.
575 Previously, when delivering serveral messages down a single connection
576 only the first would provide a SIZE. This was due to the size information
577 not being properly tracked.
579 JH/27 Bug 2530: When operating in a timezone with sub-minute offset, such as
580 TAI (at 37 seconds currently), pretend to be in UTC for time-related
581 expansion and logging. Previously, spurious values such as a future
582 minute could be seen.
584 JH/28 Bug 2533: Fix expansion of ${tr } item. When called in some situations
585 it could crash from a null-deref. This could also affect the
586 ${addresses: } operator and ${readsock } item.
588 JH/29 Bug 2537: Fix $mime_part_count. When a single connection had a non-mime
589 message following a mime one, the variable was not reset.
591 JH/30 When an pipelined-connect fails at the first response, assume incorrect
592 cached capability (perhaps the peer reneged?) and immediately retry in
595 JH/31 Fix spurious detection of timeout while writing to transport filter.
597 JH/32 Bug 2541: Fix segfault on bad cmdline -f (sender) argument. Previously
598 an attempt to copy the string was made before checking it.
600 JH/33 Fix the dsearch lookup to return an untainted result. Previously the
601 taint of the lookup key was maintained; we now regard the presence in the
602 filesystem as sufficient validation.
604 JH/34 Fix the readsocket expansion to not segfault when an empty "options"
605 argument is supplied.
607 JH/35 The dsearch lookup now requires that the directory is an absolute path.
608 Previously this was not checked, and nonempty relative paths made an
609 access under Exim's current working directory.
611 JH/36 Bug 2554: Fix msg:defer event for the hosts_max_try_hardlimit case.
612 Previously no event was raised.
614 JH/37 Bug 2552: Fix the check on spool space during reception to use the SIZE
615 parameter supplied by the sender MAIL FROM command. Previously it was
616 ignored, and only the check_spool_space option value for the required
619 JH/38 Fix $dkim_key_length. This should, after a DKIM verification, present
620 the size of the signing public-key. Previously it was instead giving
621 the size of the signature hash.
623 JH/39 DKIM verification: the RFC 8301 restriction on sizes of RSA keys is now
624 the default. See the (new) dkim_verify_min_keysizes option.
626 JH/40 Fix a memory-handling bug: when a connection carried multiple messages
627 and an ACL use a lookup for checking either the local_part or domain,
628 stale data could be accessed. Ensure that variable references are
629 dropped between messages.
631 JH/41 Bug 2571: Fix SPA authenticator. Running as a server, an offset supplied
632 by the client was not checked as pointing within response data before
633 being used. A malicious client could thus cause an out-of-bounds read and
634 possibly gain authentication. Fix by adding the check.
636 JH/42 Internationalisation: change the default for downconversion in the smtp
637 transport to be "if needed". Previously it was "as previously set" for
638 the message, which usually meant "if needed" for message-submission but
639 "no" for everything else. However, MTAs have been seen using SMTPUTF8
640 even when the envelope addresses did not need it, resulting in forwarding
641 failures to non-supporting MTAs. A downconvert in such cases will be
642 a no-op on the addresses, merely dropping the use of SMTPUTF8 by the
643 transport. The change does mean that addresses needing conversion will
644 be converted when previously a delivery failure would occur.
646 JH/43 Fix possible long line in DSN. Previously when a very long SMTP error
647 response was received it would be used unchecked in a fail-DSN, violating
648 standards on line-length limits. Truncate if needed.
650 HS/01 Remove parameters of the link to www.open-spf.org. The linked form
651 doesn't work. (Additionally add a new main config option to configure the
658 JH/01 OpenSSL: With debug enabled output keying information sufficient, server
659 side, to decode a TLS 1.3 packet capture.
661 JH/02 OpenSSL: Suppress the sending of (stateful) TLS1.3 session tickets.
662 Previously the default library behaviour applied, sending two, each in
665 JH/03 Debug output for ACL now gives the config file name and line number for
668 JH/04 The default received_header_text now uses the RFC 8314 tls cipher clause.
670 JH/05 DKIM: ensure that dkim_domain elements are lowercased before use.
672 JH/06 Fix buggy handling of autoreply bounce_return_size_limit, and a possible
673 buffer overrun for (non-chunking) other transports.
675 JH/07 GnuTLS: Our use of late (post-handshake) certificate verification, under
676 TLS1.3, means that a server rejecting a client certificate is not visible
677 to the client until the first read of encrypted data (typically the
678 response to EHLO). Add detection for that case and treat it as a failed
679 TLS connection attempt, so that the normal retry-in-clear can work (if
680 suitably configured).
682 JB/01 Bug 2375: fix expansions of 822 addresses having comments in local-part
683 and/or domain. Found and fixed by Jason Betts.
685 JH/08 Add hardening against SRV & TLSA lookups the hit CNAMEs (a nonvalid
686 configuration). If a CNAME target was not a wellformed name pattern, a
689 JH/09 Logging: Fix initial listening-on line for multiple ports for an IP when
690 the OS reports them interleaved with other addresses.
692 JH/10 OpenSSL: Fix aggregation of messages. Previously, when PIPELINING was
693 used both for input and for a verify callout, both encrypted, SMTP
694 responses being sent by the server could be lost. This resulted in
695 dropped connections and sometimes bounces generated by a peer sending
698 JH/11 Harden plaintext authenticator against a badly misconfigured client-send
699 string. Previously it was possible to cause undefined behaviour in a
700 library routine (usually a crash). Found by "zerons".
702 JH/12 Bug 2384: fix "-bP smtp_receive_timeout". Previously it returned no
705 JH/13 Bug 2386: Fix builds with Dane under LibreSSL 2.9.0 onward. Some old
706 API was removed, so update to use the newer ones.
708 JH/14 Bug 1891: Close the log file if receiving a non-smtp message, without
709 any timeout set, is taking a long time. Previously we would hang on to a
710 rotated logfile "forever" if the input was arriving with long gaps
711 (a previous attempt to fix addressed lack, for a long time, of initial
714 HS/01 Bug 2390: Use message_id for tempfile creation to avoid races in a
715 shared (NFS) environment. The length of the tempfile name is now
716 4 + 16 ("hdr.$message_exim_id") which might break on file
717 systems which restrict the file name length to lower values.
720 HS/02 Bug 2390: Use message_id for tempfile creation to avoid races in a
721 shared (NFS) environment.
723 HS/03 Bug 2392: exigrep does case sensitive *option* processing (as it
724 did for all versions <4.90). Notably -M, -m, --invert, -I may be
727 JH/15 Use unsigned when creating bitmasks in macros, to avoid build errors
728 on some platforms for bit 31.
730 JH/16 GnuTLS: rework ciphersuite strings under recent library versions. Thanks
731 to changes apparently associated with TLS1.3 handling some of the APIs
732 previously used were either nonfunctional or inappropriate. Strings
733 like TLS1.3:ECDHE_SECP256R1__RSA_PSS_RSAE_SHA256__AES_256_GCM__AEAD:256
734 and TLS1.2:ECDHE_SECP256R1__RSA_SHA256__AES_128_CBC__SHA256:128 replace
735 the previous TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256 .
736 This affects log line X= elements, the $tls_{in,out}_cipher variables,
737 and the use of specific cipher names in the encrypted= ACL condition.
739 JH/17 OpenSSL: the default openssl_options now disables ssl_v3.
741 JH/18 GnuTLS: fix $tls_out_ocsp under hosts_request_ocsp. Previously the
742 verification result was not updated unless hosts_require_ocsp applied.
744 JH/19 Bug 2398: fix listing of a named-queue. Previously, even with the option
745 queue_list_requires_admin set to false, non-admin users were denied the
748 JH/20 Bug 2389: fix server advertising of usable certificates, under GnuTLS in
749 directory-of-certs mode. Previously they were advertised despite the
752 JH/21 The smtp transport option "hosts_noproxy_tls" is now unset by default.
753 A single TCP connection by a client will now hold a TLS connection open
754 for multiple message deliveries, by default. Previously the default was to
757 JH/22 The smtp transport option "hosts_try_dane" now enables all hosts by
758 default. If built with the facility, DANE will be used. The facility
759 SUPPORT_DANE is now enabled in the prototype build Makefile "EDITME".
761 JH/23 The build default is now for TLS to be included; the SUPPORT_TLS define
762 is replaced with DISABLE_TLS. Either USE_GNUTLS or (the new) USE_OPENSSL
763 must be defined and you must still, unless you define DISABLE_TLS, manage
764 the the include-dir and library-file requirements that go with that
765 choice. Non-TLS builds are still supported.
767 JH/24 Fix duplicated logging of peer name/address, on a transport connection-
770 JH/25 The smtp transport option "hosts_try_fastopen" now enables all hosts by
771 default. If the platform supports and has the facility enabled, it will
772 be requested on all coneections.
774 JH/26 The PIPE_CONNECT facility is promoted from experimental status and is now
775 controlled by the build-time option SUPPORT_PIPE_CONNECT.
777 PP/01 Unbreak heimdal_gssapi, broken in 4.92.
779 JH/27 Bug 2404: Use the main-section configuration option "dsn_from" for
780 success-DSN messages. Previously the From: header was always the default
781 one for these; the option was ignored.
783 JH/28 Fix the timeout on smtp response to apply to the whole response.
784 Previously it was reset for every read, so a teergrubing peer sending
785 single bytes within the time limit could extend the connection for a
786 long time. Credit to Qualsys Security Advisory Team for the discovery.
788 JH/29 Fix DSN Final-Recipient: field. Previously it was the post-routing
789 delivery address, which leaked information of the results of local
790 forwarding. Change to the original envelope recipient address, per
793 JH/30 Bug 2411: Fix DSN generation when RFC 3461 failure notification is
794 requested. Previously not bounce was generated and a log entry of
795 error ignored was made.
797 JH/31 Avoid re-expansion in ${sort } expansion. (CVE-2019-13917)
799 JH/32 Introduce a general tainting mechanism for values read from the input
800 channel, and values derived from them. Refuse to expand any tainted
801 values, to catch one form of exploit.
803 JH/33 Bug 2413: Fix dkim_strict option. Previously the expansion result
804 was unused and the unexpanded text used for the test. Found and
805 fixed by Ruben Jenster.
807 JH/34 Fix crash after TLS shutdown. When the TCP/SMTP channel was left open,
808 an attempt to use a TLS library read routine dereffed a nul pointer,
811 JH/35 Bug 2409: filter out-of-spec chars from callout response before using
812 them in our smtp response.
814 JH/36 Have the general router option retry_use_local_part default to true when
815 any of the restrictive preconditions are set (to anything). Previously it
816 was only for check_local user. The change removes one item of manual
817 configuration which is required for proper retries when a remote router
818 handles a subset of addresses for a domain.
820 JH/37 Appendfile: when evaluating quota use (non-quota_size_regex) take the file
821 link count into consideration.
823 HS/04 Fix handling of very log lines in -H files. If a -<key> <value> line
824 caused the extension of big_buffer, the following lines were ignored.
826 JH/38 Bug 1395: Teach the DNS negative-cache about TTL value from the SOA in
827 accordance with RFC 2308. Previously there was no expiry, so a longlived
828 receive process (eg. due to ACL delays) versus a short SOA value could
831 HS/05 Handle trailing backslash gracefully. (CVE-2019-15846)
833 JH/39 Promote DMARC support to mainline.
835 JH/40 Bug 2452: Add a References: header to DSNs.
837 JH/41 With GnuTLS 3.6.0 (and later) do not attempt to manage Diffie-Hellman
838 parameters. The relevant library call is documented as "Deprecated: This
839 function is unnecessary and discouraged on GnuTLS 3.6.0 or later. Since
840 3.6.0, DH parameters are negotiated following RFC7919."
842 HS/06 Change the default of dnssec_request_domains to "*"
844 JH/42 Bug 2545: Fix CHUNKING for all RCPT commands rejected. Previously we
845 carried on and emitted a BDAT command, even when PIPELINING was not
848 JH/43 Bug 2465: Fix taint-handling in dsearch lookup. Previously a nontainted
849 buffer was used for the filename, resulting in a trap when tainted
850 arguments (eg. $domain) were used.
852 JH/44 With OpenSSL 1.1.1 (onwards) disable renegotiation for TLS1.2 and below;
853 recommended to avoid a possible server-load attack. The feature can be
854 re-enabled via the openssl_options main cofiguration option.
856 JH/45 local_scan API: documented the current smtp_printf() call. This changed
857 for version 4.90 - adding a "more data" boolean to the arguments.
858 Bumped the ABI version number also, this having been missed previously;
859 release versions 4.90 to 4.92.3 inclusive were effectively broken in
860 respect of usage of smtp_printf() by either local_scan code or libraries
861 accessed via the ${dlfunc } expansion item. Both will need coding
862 adjustment for any calls to smtp_printf() to match the new function
863 signature; a FALSE value for the new argument is always safe.
865 JH/46 FreeBSD: fix use of the sendfile() syscall. The shim was not updating
866 the file-offset (which the Linux syscall does, and exim expects); this
867 resulted in an indefinite loop.
869 JH/47 ARC: fix crash in signing, triggered when a configuration error failed
870 to do ARC verification. The Authentication-Results: header line added
871 by the configuration then had no ARC item.
873 JH/48 Bug 2784: fix shutdown=no in the ${readsocket) expansion item. Previously
874 an incorrect mode was used for reading the result, resulting in it being
881 JH/01 Remove code calling the customisable local_scan function, unless a new
882 definition "HAVE_LOCAL_SCAN=yes" is present in the Local/Makefile.
884 JH/02 Bug 1007: Avoid doing logging from signal-handlers, as that can result in
885 non-signal-safe functions being used.
887 JH/03 Bug 2269: When presented with a received message having a stupidly large
888 number of DKIM-Signature headers, disable DKIM verification to avoid
889 a resource-consumption attack. The limit is set at twenty.
891 JH/04 Add variables $arc_domains, $arc_oldest_pass for ARC verify. Fix the
892 report of oldest_pass in ${authres } in consequence, and separate out
893 some descriptions of reasons for verification fail.
895 JH/05 Bug 2273: Cutthrough delivery left a window where the received messsage
896 files in the spool were present and unlocked. A queue-runner could spot
897 them, resulting in a duplicate delivery. Fix that by doing the unlock
898 after the unlink. Investigation by Tim Stewart. Take the opportunity to
899 add more error-checking on spoolfile handling while that code is being
902 PP/01 Refuse to open a spool data file (*-D) if it's a symlink.
903 No known attacks, no CVE, this is defensive hardening.
905 JH/06 Bug 2275: The MIME ACL unlocked the received message files early, and
906 a queue-runner could start a delivery while other operations were ongoing.
907 Cutthrough delivery was a common victim, resulting in duplicate delivery.
908 Found and investigated by Tim Stewart. Fix by using the open message data
909 file handle rather than opening another, and not locally closing it (which
910 releases a lock) for that case, while creating the temporary .eml format
911 file for the MIME ACL. Also applies to "regex" and "spam" ACL conditions.
913 JH/07 Bug 177: Make a random-recipient callout success visible in ACL, by setting
914 $sender_verify_failure/$recipient_verify_failure to "random".
916 JH/08 When generating a selfsigned cert, use serial number 1 since zero is not
919 JH/09 Bug 2274: Fix logging of cmdline args when starting in an unlinked cwd.
920 Previously this would segfault.
922 JH/10 Fix ARC signing for case when DKIM signing failed. Previously this would
925 JH/11 Bug 2264: Exim now only follows CNAME chains one step by default. We'd
926 like zero, since the resolver should be doing this for us, But we need one
927 as a CNAME but no MX presence gets the CNAME returned; we need to check
928 that doesn't point to an MX to declare it "no MX returned" rather than
929 "error, loop". A new main option is added so the older capability of
930 following some limited number of chain links is maintained.
932 JH/12 Add client-ip info to non-pass iprev ${authres } lines.
934 JH/13 For receent Openssl versions (1.1 onward) use modern generic protocol
935 methods. These should support TLS 1.3; they arrived with TLS 1.3 and the
936 now-deprecated earlier definitions used only specified the range up to TLS
937 1.2 (in the older-version library docs).
939 JH/14 Bug 2284: Fix DKIM signing for body lines starting with a pair of dots.
941 JH/15 Rework TLS client-side context management. Stop using a global, and
942 explicitly pass a context around. This enables future use of TLS for
943 connections to service-daemons (eg. malware scanning) while a client smtp
944 connection is using TLS; with cutthrough connections this is quite likely.
946 JH/16 Fix ARC verification to do AS checks in reverse order.
948 JH/17 Support a "tls" option on the ${readsocket } expansion item.
950 JH/18 Bug 2287: Fix the protocol name (eg utf8esmtp) for multiple messages
951 using the SMTPUTF8 option on their MAIL FROM commands, in one connection.
952 Previously the "utf8" would be re-prepended for every additional message.
954 JH/19 Reject MAIL FROM commands with SMTPUTF8 when the facility was not advertised.
955 Previously thery were accepted, resulting in issues when attempting to
956 forward messages to a non-supporting MTA.
958 PP/02 Let -n work with printing macros too, not just options.
960 JH/20 Bug 2296: Fix cutthrough for >1 address redirection. Previously only
961 one parent address was copied, and bogus data was used at delivery-logging
962 time. Either a crash (after delivery) or bogus log data could result.
963 Discovery and analysis by Tim Stewart.
965 PP/03 Make ${utf8clean:} expansion operator detect incomplete final character.
966 Previously if the string ended mid-character, we did not insert the
967 promised '?' replacement.
969 PP/04 Documentation: current string operators work on bytes, not codepoints.
971 JH/21 Change as many as possible of the global flags into one-bit bitfields; these
972 should pack well giving a smaller memory footprint so better caching and
973 therefore performance. Group the declarations where this can't be done so
974 that the byte-sized flag variables are not interspersed among pointer
975 variables, giving a better chance of good packing by the compiler.
977 JH/22 Bug 1896: Fix the envelope from for DMARC forensic reports to be possibly
978 non-null, to avoid issues with sites running BATV. Previously reports were
979 sent with an empty envelope sender so looked like bounces.
981 JH/23 Bug 2318: Fix the noerror command within filters. It wasn't working.
982 The ignore_error flag wasn't being returned from the filter subprocess so
983 was not set for later routers. Investigation and fix by Matthias Kurz.
985 JH/24 Bug 2310: Raise a msg:fail:internal event for each undelivered recipient,
986 and a msg:complete for the whole, when a message is manually removed using
987 -Mrm. Developement by Matthias Kurz, hacked on by JH.
989 JH/25 Avoid fixed-size buffers for pathnames in DB access. This required using
990 a "Gnu special" function, asprintf() in the DB utility binary builds; I
991 hope that is portable enough.
993 JH/26 Bug 2311: Fix DANE-TA verification under GnuTLS. Previously it was also
994 requiring a known-CA anchor certificate; make it now rely entirely on the
995 TLSA as an anchor. Checking the name on the leaf cert against the name
996 on the A-record for the host is still done for TA (but not for EE mode).
998 JH/27 Fix logging of proxy address. Previously, a pointless "PRX=[]:0" would be
999 included in delivery lines for non-proxied connections, when compiled with
1000 SUPPORT_SOCKS and running with proxy logging enabled.
1002 JH/28 Bug 2314: Fire msg:fail:delivery event even when error is being ignored.
1003 Developement by Matthias Kurz, tweaked by JH. While in that bit of code,
1004 move the existing event to fire before the normal logging of message
1005 failure so that custom logging is bracketed by normal logging.
1007 JH/29 Bug 2322: A "fail" command in a non-system filter (file) now fires the
1008 msg:fail:internal event. Developement by Matthias Kurz.
1010 JH/30 Bug 2329: Increase buffer size used for dns lookup from 2k, which was
1011 far too small for todays use of crypto signatures stored there. Go all
1012 the way to the max DNS message size of 64kB, even though this might be
1013 overmuch for IOT constrained device use.
1015 JH/31 Fix a bad use of a copy function, which could be used to pointlessly
1016 copy a string over itself. The library routine is documented as not
1017 supporting overlapping copies, and on MacOS it actually raised a SIGABRT.
1019 JH/32 For main options check_spool_space and check_inode_space, where the
1020 platform supports 64b integers, support more than the previous 2^31 kB
1021 (i.e. more than 2 TB). Accept E, P and T multipliers in addition to
1022 the previous G, M, k.
1024 JH/33 Bug 2338: Fix the cyrus-sasl authenticator to fill in the
1025 $authenticated_fail_id variable on authentication failure. Previously
1028 JH/34 Increase RSA keysize of autogen selfsign cert from 1024 to 2048. RHEL 8.0
1029 OpenSSL didn't want to use such a weak key. Do for GnuTLS also, and for
1030 more-modern GnuTLS move from GNUTLS_SEC_PARAM_LOW to
1031 GNUTLS_SEC_PARAM_MEDIUM.
1033 JH/35 OpenSSL: fail the handshake when SNI processing hits a problem, server
1034 side. Previously we would continue as if no SNI had been received.
1036 JH/36 Harden the handling of string-lists. When a list consisted of a sole
1037 "<" character, which should be a list-separator specification, we walked
1038 off past the nul-terimation.
1040 JH/37 Bug 2341: Send "message delayed" warning MDNs (restricted to external
1041 causes) even when the retry time is not yet met. Previously they were
1042 not, meaning that when (say) an account was over-quota and temp-rejecting,
1043 and multiple senders' messages were queued, only one sender would get
1044 notified on each configured delay_warning cycle.
1046 JH/38 Bug 2351: Log failures to extract envelope addresses from message headers.
1048 JH/39 OpenSSL: clear the error stack after an SSL_accept(). With anon-auth
1049 cipher-suites, an error can be left on the stack even for a succeeding
1050 accept; this results in impossible error messages when a later operation
1053 AM/01 Bug 2359: GnuTLS: repeat lowlevel read and write operations while they
1054 return error codes indicating retry. Under TLS1.3 this becomes required.
1056 JH/40 Fix the feature-cache refresh for EXPERIMENTAL_PIPE_CONNECT. Previously
1057 it only wrote the new authenticators, resulting in a lack of tracking of
1058 peer changes of ESMTP extensions until the next cache flush.
1060 JH/41 Fix the loop reading a message header line to check for integer overflow,
1061 and more-often against header_maxsize. Previously a crafted message could
1062 induce a crash of the recive process; now the message is cleanly rejected.
1064 JH/42 Bug 2366: Fix the behaviour of the dkim_verify_signers option. It had
1065 been totally disabled for all of 4.91. Discovery and fix by "Mad Alex".
1071 GF/01 DEFER rather than ERROR on redis cluster MOVED response.
1072 When redis_servers is set to a list of > 1 element, and the Redis servers
1073 in that list are in cluster configuration, convert the REDIS_REPLY_ERROR
1074 case of MOVED into a DEFER case instead, thus moving the query onto the
1075 next server in the list. For a cluster of N elements, all N servers must
1076 be defined in redis_servers.
1078 GF/02 Catch and remove uninitialized value warning in exiqsumm
1079 Check for existence of @ARGV before looking at $ARGV[0]
1081 JH/01 Replace the store_release() internal interface with store_newblock(),
1082 which internalises the check required to safely use the old one, plus
1083 the allocate and data copy operations duplicated in both (!) of the
1084 extant use locations.
1086 JH/02 Disallow '/' characters in queue names specified for the "queue=" ACL
1087 modifier. This matches the restriction on the commandline.
1089 JH/03 Fix pgsql lookup for multiple result-tuples with a single column.
1090 Previously only the last row was returned.
1092 JH/04 Bug 2217: Tighten up the parsing of DKIM signature headers. Previously
1093 we assumed that tags in the header were well-formed, and parsed the
1094 element content after inspecting only the first char of the tag.
1095 Assumptions at that stage could crash the receive process on malformed
1098 JH/05 Bug 2215: Fix crash associated with dnsdb lookup done from DKIM ACL.
1099 While running the DKIM ACL we operate on the Permanent memory pool so that
1100 variables created with "set" persist to the DATA ACL. Also (at any time)
1101 DNS lookups that fail create cache records using the Permanent pool. But
1102 expansions release any allocations made on the current pool - so a dnsdb
1103 lookup expansion done in the DKIM ACL releases the memory used for the
1104 DNS negative-cache, and bad things result. Solution is to switch to the
1105 Main pool for expansions.
1106 While we're in that code, add checks on the DNS cache during store_reset,
1107 active in the testsuite.
1108 Problem spotted, and debugging aided, by Wolfgang Breyha.
1110 JH/06 Fix issue with continued-connections when the DNS shifts unreliably.
1111 When none of the hosts presented to a transport match an already-open
1112 connection, close it and proceed with the list. Previously we would
1113 queue the message. Spotted by Lena with Yahoo, probably involving
1116 JH/07 Bug 2214: Fix SMTP responses resulting from non-accept result of MIME ACL.
1117 Previously a spurious "250 OK id=" response was appended to the proper
1120 JH/08 The "support for" informational output now, which built with Content
1121 Scanning support, has a line for the malware scanner interfaces compiled
1122 in. Interface can be individually included or not at build time.
1124 JH/09 The "aveserver", "kavdaemon" and "mksd" interfaces are now not included
1125 by the template makefile "src/EDITME". The "STREAM" support for an older
1126 ClamAV interface method is removed.
1128 JH/10 Bug 2223: Fix mysql lookup returns for the no-data case (when the number of
1129 rows affected is given instead).
1131 JH/11 The runtime Berkeley DB library version is now additionally output by
1132 "exim -d -bV". Previously only the compile-time version was shown.
1134 JH/12 Bug 2230: Fix cutthrough routing for nonfirst messages in an initiating
1135 SMTP connection. Previously, when one had more recipients than the
1136 first, an abortive onward connection was made. Move to full support for
1137 multiple onward connections in sequence, handling cutthrough connection
1138 for all multi-message initiating connections.
1140 JH/13 Bug 2229: Fix cutthrough routing for nonstandard port numbers defined by
1141 routers. Previously, a multi-recipient message would fail to match the
1142 onward-connection opened for the first recipient, and cause its closure.
1144 JH/14 Bug 2174: A timeout on connect for a callout was also erroneously seen as
1145 a timeout on read on a GnuTLS initiating connection, resulting in the
1146 initiating connection being dropped. This mattered most when the callout
1147 was marked defer_ok. Fix to keep the two timeout-detection methods
1150 JH/15 Relax results from ACL control request to enable cutthrough, in
1151 unsupported situations, from error to silently (except under debug)
1152 ignoring. This covers use with PRDR, frozen messages, queue-only and
1155 HS/01 Fix Buffer overflow in base64d() (CVE-2018-6789)
1157 JH/16 Fix bug in DKIM verify: a buffer overflow could corrupt the malloc
1158 metadata, resulting in a crash in free().
1160 PP/01 Fix broken Heimdal GSSAPI authenticator integration.
1161 Broken in f2ed27cf5, missing an equals sign for specified-initialisers.
1162 Broken also in d185889f4, with init system revamp.
1164 JH/17 Bug 2113: Fix conversation closedown with the Avast malware scanner.
1165 Previously we abruptly closed the connection after reading a malware-
1166 found indication; now we go on to read the "scan ok" response line,
1169 JH/18 Bug 2239: Enforce non-usability of control=utf8_downconvert in the mail
1170 ACL. Previously, a crash would result.
1172 JH/19 Speed up macro lookups during configuration file read, by skipping non-
1173 macro text after a replacement (previously it was only once per line) and
1174 by skipping builtin macros when searching for an uppercase lead character.
1176 JH/20 DANE support moved from Experimental to mainline. The Makefile control
1177 for the build is renamed.
1179 JH/21 Fix memory leak during multi-message connections using STARTTLS. A buffer
1180 was allocated for every new TLS startup, meaning one per message. Fix
1181 by only allocating once (OpenSSL) or freeing on TLS-close (GnuTLS).
1183 JH/22 Bug 2236: When a DKIM verification result is overridden by ACL, DMARC
1184 reported the original. Fix to report (as far as possible) the ACL
1185 result replacing the original.
1187 JH/23 Fix memory leak during multi-message connections using STARTTLS under
1188 OpenSSL. Certificate information is loaded for every new TLS startup,
1189 and the resources needed to be freed.
1191 JH/24 Bug 2242: Fix exim_dbmbuild to permit directoryless filenames.
1193 JH/25 Fix utf8_downconvert propagation through a redirect router. Previously it
1196 JH/26 Bug 2253: For logging delivery lines under PRDR, append the overall
1197 DATA response info to the (existing) per-recipient response info for
1198 the "C=" log element. It can have useful tracking info from the
1199 destination system. Patch from Simon Arlott.
1201 JH/27 Bug 2251: Fix ldap lookups that return a single attribute having zero-
1202 length value. Previously this would segfault.
1204 HS/02 Support Avast multiline protoocol, this allows passing flags to
1205 newer versions of the scanner.
1207 JH/28 Ensure that variables possibly set during message acceptance are marked
1208 dead before release of memory in the daemon loop. This stops complaints
1209 about them when the debug_store option is enabled. Discovered specifically
1210 for sender_rate_period, but applies to a whole set of variables.
1211 Do the same for the queue-runner and queue-list loops, for variables set
1212 from spool message files. Do the same for the SMTP per-message loop, for
1213 certain variables indirectly set in ACL operations.
1215 JH/29 Bug 2250: Fix a longstanding bug in heavily-pipelined SMTP input (such
1216 as a multi-recipient message from a mailinglist manager). The coding had
1217 an arbitrary cutoff number of characters while checking for more input;
1218 enforced by writing a NUL into the buffer. This corrupted long / fast
1219 input. The problem was exposed more widely when more pipelineing of SMTP
1220 responses was introduced, and one Exim system was feeding another.
1221 The symptom is log complaints of SMTP syntax error (NUL chars) on the
1222 receiving system, and refused recipients seen by the sending system
1223 (propating to people being dropped from mailing lists).
1224 Discovered and pinpointed by David Carter.
1226 JH/30 The (EXPERIMENTAL_DMARC) variable $dmarc_ar_header is withdrawn, being
1227 replaced by the ${authresults } expansion.
1229 JH/31 Bug 2257: Fix pipe transport to not use a socket-only syscall.
1231 HS/03 Set a handler for SIGTERM and call exit(3) if running as PID 1. This
1232 allows proper process termination in container environments.
1234 JH/32 Bug 2258: Fix spool_wireformat in combination with LMTP transport.
1235 Previously the "final dot" had a newline after it; ensure it is CR,LF.
1237 JH/33 SPF: remove support for the "spf" ACL condition outcome values "err_temp"
1238 and "err_perm", deprecated since 4.83 when the RFC-defined words
1239 "temperror" and "permerror" were introduced.
1241 JH/34 Re-introduce enforcement of no cutthrough delivery on transports having
1242 transport-filters or DKIM-signing. The restriction was lost in the
1243 consolidation of verify-callout and delivery SMTP handling.
1244 Extend the restriction to also cover ARC-signing.
1246 JH/35 Cutthrough: for a final-dot response timeout (and nonunderstood responses)
1247 in defer=pass mode supply a 450 to the initiator. Previously the message
1250 PP/02 DANE: add dane_require_tls_ciphers SMTP Transport option; if unset,
1251 tls_require_ciphers is used as before.
1253 HS/03 Malware Avast: Better match the Avast multiline protocol. Add
1254 "pass_unscanned". Only tmpfails from the scanner are written to
1255 the paniclog, as they may require admin intervention (permission
1256 denied, license issues). Other scanner errors (like decompression
1257 bombs) do not cause a paniclog entry.
1259 JH/36 Fix reinitialisation of DKIM logging variable between messages.
1260 Previously it was possible to log spurious information in receive log
1263 JH/37 Bug 2255: Revert the disable of the OpenSSL session caching. This
1264 triggered odd behaviour from Outlook Express clients.
1266 PP/03 Add util/renew-opendmarc-tlds.sh script for safe renewal of public
1269 JH/38 DKIM: accept Ed25519 pubkeys in SubjectPublicKeyInfo-wrapped form,
1270 since the IETF WG has not yet settled on that versus the original
1271 "bare" representation.
1273 JH/39 Fix syslog logging for syslog_timestamp=no and log_selector +millisec.
1274 Previously the millisecond value corrupted the output.
1275 Fix also for syslog_pid=no and log_selector +pid, for which the pid
1276 corrupted the output.
1282 JH/01 Rework error string handling in TLS interface so that the caller in
1283 more cases is responsible for logging. This permits library-sourced
1284 string to be attached to addresses during delivery, and collapses
1285 pairs of long lines into single ones.
1287 PP/01 Allow PKG_CONFIG_PATH to be set in Local/Makefile and use it correctly
1288 during configuration. Wildcards are allowed and expanded.
1290 JH/02 Rework error string handling in DKIM to pass more info back to callers.
1291 This permits better logging.
1293 JH/03 Rework the transport continued-connection mechanism: when TLS is active,
1294 do not close it down and have the child transport start it up again on
1295 the passed-on TCP connection. Instead, proxy the child (and any
1296 subsequent ones) for TLS via a unix-domain socket channel. Logging is
1297 affected: the continued delivery log lines do not have any DNSSEC, TLS
1298 Certificate or OCSP information. TLS cipher information is still logged.
1300 JH/04 Shorten the log line for daemon startup by collapsing adjacent sets of
1301 identical IP addresses on different listening ports. Will also affect
1304 PP/02 Bug 2070: uClibc defines __GLIBC__ without providing glibc headers;
1305 add noisy ifdef guards to special-case this sillyness.
1306 Patch from Bernd Kuhls.
1308 JH/05 Tighten up the checking in isip4 (et al): dotted-quad components larger
1309 than 255 are no longer allowed.
1311 JH/06 Default openssl_options to include +no_ticket, to reduce load on peers.
1312 Disable the session-cache too, which might reduce our load. Since we
1313 currrectly use a new context for every connection, both as server and
1314 client, there is no benefit for these.
1315 GnuTLS appears to not support tickets server-side by default (we don't
1316 call gnutls_session_ticket_enable_server()) but client side is enabled
1317 by default on recent versions (3.1.3 +) unless the PFS priority string
1320 PP/03 Add $SOURCE_DATE_EPOCH support for reproducible builds, per spec at
1321 <https://reproducible-builds.org/specs/source-date-epoch/>.
1323 JH/07 Fix smtp transport use of limited max_rcpt under mua_wrapper. Previously
1324 the check for any unsuccessful recipients did not notice the limit, and
1325 erroneously found still-pending ones.
1327 JH/08 Pipeline CHUNKING command and data together, on kernels that support
1328 MSG_MORE. Only in-clear (not on TLS connections).
1330 JH/09 Avoid using a temporary file during transport using dkim. Unless a
1331 transport-filter is involved we can buffer the headers in memory for
1332 creating the signature, and read the spool data file once for the
1333 signature and again for transmission.
1335 JH/10 Enable use of sendfile in Linux builds as default. It was disabled in
1336 4.77 as the kernel support then wasn't solid, having issues in 64bit
1337 mode. Now, it's been long enough. Add support for FreeBSD also.
1339 JH/11 Bug 2104: Fix continued use of a transport connection with TLS. In the
1340 case where the routing stage had gathered several addresses to send to
1341 a host before calling the transport for the first, we previously failed
1342 to close down TLS in the old transport process before passing the TCP
1343 connection to the new process. The new one sent a STARTTLS command
1344 which naturally failed, giving a failed delivery and bloating the retry
1345 database. Investigation and fix prototype from Wolfgang Breyha.
1347 JH/12 Fix check on SMTP command input synchronisation. Previously there were
1348 false-negatives in the check that the sender had not preempted a response
1349 or prompt from Exim (running as a server), due to that code's lack of
1350 awareness of the SMTP input buffering.
1352 PP/04 Add commandline_checks_require_admin option.
1353 Exim drops privileges sanely, various checks such as -be aren't a
1354 security problem, as long as you trust local users with access to their
1355 own account. When invoked by services which pass untrusted data to
1356 Exim, this might be an issue. Set this option in main configuration
1357 AND make fixes to the calling application, such as using `--` to stop
1360 JH/13 Do pipelining under TLS. Previously, although safe, no advantage was
1361 taken. Now take care to pack both (client) MAIL,RCPT,DATA, and (server)
1362 responses to those, into a single TLS record each way (this usually means
1363 a single packet). As a side issue, smtp_enforce_sync now works on TLS
1366 PP/05 OpenSSL/1.1: use DH_bits() for more accurate DH param sizes. This
1367 affects you only if you're dancing at the edge of the param size limits.
1368 If you are, and this message makes sense to you, then: raise the
1369 configured limit or use OpenSSL 1.1. Nothing we can do for older
1372 JH/14 For the "sock" variant of the malware scanner interface, accept an empty
1373 cmdline element to get the documented default one. Previously it was
1376 JH/15 Fix a crash in the smtp transport caused when two hosts in succession
1377 are unsuable for non-message-specific reasons - eg. connection timeout,
1378 banner-time rejection.
1380 JH/16 Fix logging of delivery remote port, when specified by router, under
1383 PP/06 Repair manualroute's ability to take options in any order, even if one
1384 is the name of a transport.
1387 HS/01 Cleanup, prevent repeated use of -p/-oMr (CVE-2017-1000369)
1389 JH/17 Change the list-building routines interface to use the expanding-string
1390 triplet model, for better allocation and copying behaviour.
1392 JH/18 Prebuild the data-structure for "builtin" macros, for faster startup.
1393 Previously it was constructed the first time a possibly-matching string
1394 was met in the configuration file input during startup; now it is done
1397 JH/19 Bug 2141: Use the full-complex API for Berkeley DB rather than the legacy-
1398 compatible one, to avoid the (poorly documented) possibility of a config
1399 file in the working directory redirecting the DB files, possibly correpting
1400 some existing file. CVE-2017-10140 assigned for BDB.
1402 JH/20 Bug 2147: Do not defer for a verify-with-callout-and-random which is not
1403 cache-hot. Previously, although the result was properly cached, the
1404 initial verify call returned a defer.
1406 JH/21 Bug 2151: Avoid using SIZE on the MAIL for a callout verify, on any but
1407 the main verify for receipient in uncached-mode.
1409 JH/22 Retire historical build files to an "unsupported" subdir. These are
1410 defined as "ones for which we have no current evidence of testing".
1412 JH/23 DKIM: enforce the DNS pubkey record "h" permitted-hashes optional field,
1413 if present. Previously it was ignored.
1415 JH/24 Start using specified-initialisers in C structure init coding. This is
1416 a C99 feature (it's 2017, so now considered safe).
1418 JH/25 Use one-bit bitfields for flags in the "addr" data structure. Previously
1419 if was a fixed-sized field and bitmask ops via macros; it is now more
1422 PP/07 GitHub PR 56: Apply MariaDB build fix.
1423 Patch provided by Jaroslav Škarvada.
1425 PP/08 Bug 2161: Fix regression in sieve quoted-printable handling introduced
1426 during Coverity cleanups [4.87 JH/47]
1427 Diagnosis and fix provided by Michael Fischer v. Mollard.
1429 JH/26 Fix DKIM bug: when the pseudoheader generated for signing was exactly
1430 the right size to place the terminating semicolon on its own folded
1431 line, the header hash was calculated to an incorrect value thanks to
1432 the (relaxed) space the fold became.
1434 HS/02 Fix Bug 2130: large writes from the transport subprocess were chunked
1435 and confused the parent.
1437 JH/27 Fix SOCKS bug: an unitialized pointer was deref'd by the transport process
1438 which could crash as a result. This could lead to undeliverable messages.
1440 JH/28 Logging: "next input sent too soon" now shows where input was truncated
1443 JH/29 Fix queue_run_in_order to ignore the PID portion of the message ID. This
1444 matters on fast-turnover and PID-randomising systems, which were getting
1445 out-of-order delivery.
1447 JH/30 Fix a logging bug on aarch64: an unsafe routine was previously used for
1448 a possibly-overlapping copy. The symptom was that "Remote host closed
1449 connection in response to HELO" was logged instead of the actual 4xx
1452 JH/31 Fix CHUNKING code to properly flush the unwanted chunk after an error.
1453 Previously only that bufferd was discarded, resulting in SYMTP command
1456 JH/32 DKIM: when a message has multiple signatures matching an identity given
1457 in dkim_verify_signers, run the dkim acl once for each. Previously only
1458 one run was done. Bug 2189.
1460 JH/33 Downgrade an unfound-list name (usually a typo in the config file) from
1461 "panic the current process" to "deliberately defer". The panic log is
1462 still written with the problem list name; the mail and reject logs now
1463 get a temp-reject line for the message that was being handled, saying
1464 something like "domains check lookup or other defer". The SMTP 451
1465 message is still "Temporary local problem".
1467 JH/34 Bug 2199: Fix a use-after-free while reading smtp input for header lines.
1468 A crafted sequence of BDAT commands could result in in-use memory beeing
1469 freed. CVE-2017-16943.
1471 HS/03 Bug 2201: Fix checking for leading-dot on a line during headers reading
1472 from SMTP input. Previously it was always done; now only done for DATA
1473 and not BDAT commands. CVE-2017-16944.
1475 JH/35 Bug 2201: Flush received data in BDAT mode after detecting an error fatal
1476 to the message (such as an overlong header line). Previously this was
1477 not done and we did not exit BDAT mode. Followon from the previous item
1478 though a different problem.
1484 JH/01 Bug 1922: Support IDNA2008. This has slightly different conversion rules
1485 than -2003 did; needs libidn2 in addition to libidn.
1487 JH/02 The path option on a pipe transport is now expanded before use.
1489 PP/01 GitHub PR 50: Do not call ldap_start_tls_s on ldapi:// connections.
1490 Patch provided by "Björn", documentation fix added too.
1492 JH/03 Bug 2003: fix Proxy Protocol v2 handling: the address size field was
1493 missing a wire-to-host endian conversion.
1495 JH/04 Bug 2004: fix CHUNKING in non-PIPELINEING mode. Chunk data following
1496 close after a BDAT command line could be taken as a following command,
1497 giving a synch failure. Fix by only checking for synch immediately
1498 before acknowledging the chunk.
1500 PP/02 GitHub PR 52: many spelling fixes, which include fixing parsing of
1501 no_require_dnssec option and creation of _HAVE_TRANSPORT_APPEND_MAILDIR
1502 macro. Patches provided by Josh Soref.
1504 JH/05 Have the EHLO response advertise VRFY, if there is a vrfy ACL defined.
1505 Previously we did not; the RFC seems ambiguous and VRFY is not listed
1506 by IANA as a service extension. However, John Klensin suggests that we
1509 JH/06 Bug 2017: Fix DKIM verification in -bh test mode. The data feed into
1510 the dkim code may be unix-mode line endings rather than smtp wire-format
1511 CRLF, so prepend a CR to any bare LF.
1513 JH/07 Rationalise the coding for callout smtp conversations and transport ones.
1514 As a side-benfit, callouts can now use PIPELINING hence fewer round-trips.
1516 JH/08 Bug 2016: Fix DKIM verification vs. CHUNKING. Any BDAT commands after
1517 the first were themselves being wrongly included in the feed into dkim
1518 processing; with most chunk sizes in use this resulted in an incorrect
1519 body hash calculated value.
1521 JH/09 Bug 2014: permit inclusion of a DKIM-Signature header in a received
1522 DKIM signature block, for verification. Although advised against by
1523 standards it is specifically not ruled illegal.
1525 JH/10 Bug 2025: Fix reception of (quoted) local-parts with embedded spaces.
1527 JH/11 Bug 2029: Fix crash in DKIM verification when a message signature block is
1528 missing a body hash (the bh= tag).
1530 JH/12 Bug 2018: Re-order Proxy Protocol startup versus TLS-on-connect startup.
1531 It seems that HAProxy sends the Proxy Protocol information in clear and
1532 only then does a TLS startup, so do the same.
1534 JH/13 Bug 2027: Avoid attempting to use TCP Fast Open for non-transport client
1535 TCP connections (such as for Spamd) unless the daemon successfully set
1536 Fast Open mode on its listening sockets. This fixes breakage seen on
1537 too-old kernels or those not configured for Fast Open, at the cost of
1538 requiring both directions being enabled for TFO, and TFO never being used
1539 by non-daemon-related Exim processes.
1541 JH/14 Bug 2000: Reject messages recieved with CHUNKING but with malformed line
1542 endings, at least on the first header line. Try to canonify any that get
1543 past that check, despite the cost.
1545 JH/15 Angle-bracket nesting (an error inserted by broken sendmails) levels are
1546 now limited to an arbitrary five deep, while parsing addresses with the
1547 strip_excess_angle_brackets option enabled.
1549 PP/03 Bug 2018: For Proxy Protocol and TLS-on-connect, do not over-read and
1550 instead leave the unprompted TLS handshake in socket buffer for the
1551 TLS library to consume.
1553 PP/04 Bug 2018: Also handle Proxy Protocol v2 safely.
1555 PP/05 FreeBSD compat: handle that Ports no longer create /usr/bin/perl
1557 JH/16 Drop variables when they go out of scope. Memory management drops a whole
1558 region in one operation, for speed, and this leaves assigned pointers
1559 dangling. Add checks run only under the testsuite which checks all
1560 variables at a store-reset and panics on a dangling pointer; add code
1561 explicitly nulling out all the variables discovered. Fixes one known
1562 bug: a transport crash, where a dangling pointer for $sending_ip_address
1563 originally assigned in a verify callout, is re-used.
1565 PP/06 Drop '.' from @INC in various Perl scripts.
1567 PP/07 Switch FreeBSD iconv to always use the base-system libc functions.
1569 PP/08 Reduce a number of compilation warnings under clang; building with
1570 CC=clang CFLAGS+=-Wno-dangling-else -Wno-logical-op-parentheses
1571 should be warning-free.
1573 JH/17 Fix inbound CHUNKING when DKIM disabled at runtime.
1575 HS/01 Fix portability problems introduced by PP/08 for platforms where
1576 realloc(NULL) is not equivalent to malloc() [SunOS et al].
1578 HS/02 Bug 1974: Fix missing line terminator on the last received BDAT
1579 chunk. This allows us to accept broken chunked messages. We need a more
1580 general solution here.
1582 PP/09 Wrote util/chunking_fixqueue_finalnewlines.pl to help recover
1583 already-broken messages in the queue.
1585 JH/18 Bug 2061: Fix ${extract } corrupting an enclosing ${reduce } $value.
1587 JH/19 Fix reference counting bug in routing-generated-address tracking.
1593 JH/01 Use SIZE on MAIL FROM in a cutthrough connection, if the destination
1594 supports it and a size is available (ie. the sending peer gave us one).
1596 JH/02 The obsolete acl condition "demime" is removed (finally, after ten
1597 years of being deprecated). The replacements are the ACLs
1598 acl_smtp_mime and acl_not_smtp_mime.
1600 JH/03 Upgrade security requirements imposed for hosts_try_dane: previously
1601 a downgraded non-dane trust-anchor for the TLS connection (CA-style)
1602 or even an in-clear connection were permitted. Now, if the host lookup
1603 was dnssec and dane was requested then the host is only used if the
1604 TLSA lookup succeeds and is dnssec. Further hosts (eg. lower priority
1605 MXs) will be tried (for hosts_try_dane though not for hosts_require_dane)
1606 if one fails this test.
1607 This means that a poorly-configured remote DNS will make it incommunicado;
1608 but it protects against a DNS-interception attack on it.
1610 JH/04 Bug 1810: make continued-use of an open smtp transport connection
1611 non-noisy when a race steals the message being considered.
1613 JH/05 If main configuration option tls_certificate is unset, generate a
1614 self-signed certificate for inbound TLS connections.
1616 JH/06 Bug 165: hide more cases of password exposure - this time in expansions
1617 in rewrites and routers.
1619 JH/07 Retire gnutls_require_mac et.al. These were nonfunctional since 4.80
1620 and logged a warning sing 4.83; now they are a configuration file error.
1622 JH/08 Bug 1836: Fix crash in VRFY handling when handed an unqualified name
1623 (lacking @domain). Apply the same qualification processing as RCPT.
1625 JH/09 Bug 1804: Avoid writing msglog files when in -bh or -bhc mode.
1627 JH/10 Support ${sha256:} applied to a string (as well as the previous
1630 JH/11 Cutthrough: avoid using the callout hints db on a verify callout when
1631 a cutthrough deliver is pending, as we always want to make a connection.
1632 This also avoids re-routing the message when later placing the cutthrough
1633 connection after a verify cache hit.
1634 Do not update it with the verify result either.
1636 JH/12 Cutthrough: disable when verify option success_on_redirect is used, and
1637 when routing results in more than one destination address.
1639 JH/13 Cutthrough: expand transport dkim_domain option when testing for dkim
1640 signing (which inhibits the cutthrough capability). Previously only
1641 the presence of an option was tested; now an expansion evaluating as
1642 empty is permissible (obviously it should depend only on data available
1643 when the cutthrough connection is made).
1645 JH/14 Fix logging of errors under PIPELINING. Previously the log line giving
1646 the relevant preceding SMTP command did not note the pipelining mode.
1648 JH/15 Fix counting of empty lines in $body_linecount and $message_linecount.
1649 Previously they were not counted.
1651 JH/16 DANE: treat a TLSA lookup response having all non-TLSA RRs, the same
1652 as one having no matching records. Previously we deferred the message
1653 that needed the lookup.
1655 JH/17 Fakereject: previously logged as a normal message arrival "<="; now
1656 distinguished as "(=".
1658 JH/18 Bug 1867: make the fail_defer_domains option on a dnslookup router work
1659 for missing MX records. Previously it only worked for missing A records.
1661 JH/19 Bug 1850: support Radius libraries that return REJECT_RC.
1663 JH/20 Bug 1872: Ensure that acl_smtp_notquit is run when the connection drops
1664 after the data-go-ahead and data-ack. Patch from Jason Betts.
1666 JH/21 Bug 1846: Send DMARC forensic reports for reject and quarantine results,
1667 even for a "none" policy. Patch from Tony Meyer.
1669 JH/22 Fix continued use of a connection for further deliveries. If a port was
1670 specified by a router, it must also match for the delivery to be
1673 JH/23 Bug 1874: fix continued use of a connection for further deliveries.
1674 When one of the recipients of a message was unsuitable for the connection
1675 (has no matching addresses), we lost track of needing to mark it
1676 deferred. As a result mail would be lost.
1678 JH/24 Bug 1832: Log EHLO response on getting conn-close response for HELO.
1680 JH/25 Decoding ACL controls is now done using a binary search; the source code
1681 takes up less space and should be simpler to maintain. Merge the ACL
1682 condition decode tables also, with similar effect.
1684 JH/26 Fix problem with one_time used on a redirect router which returned the
1685 parent address unchanged. A retry would see the parent address marked as
1686 delivered, so not attempt the (identical) child. As a result mail would
1689 JH/27 Fix a possible security hole, wherein a process operating with the Exim
1690 UID can gain a root shell. Credit to http://www.halfdog.net/ for
1691 discovery and writeup. Ubuntu bug 1580454; no bug raised against Exim
1694 JH/28 Enable {spool,log} filesystem space and inode checks as default.
1695 Main config options check_{log,spool}_{inodes,space} are now
1696 100 inodes, 10MB unless set otherwise in the configuration.
1698 JH/29 Fix the connection_reject log selector to apply to the connect ACL.
1699 Previously it only applied to the main-section connection policy
1702 JH/30 Bug 1897: fix callouts connection fallback from TLS to cleartext.
1704 PP/01 Changed default Diffie-Hellman parameters to be Exim-specific, created
1705 by me. Added RFC7919 DH primes as an alternative.
1707 PP/02 Unbreak build via pkg-config with new hash support when crypto headers
1708 are not in the system include path.
1710 JH/31 Fix longstanding bug with aborted TLS server connection handling. Under
1711 GnuTLS, when a session startup failed (eg because the client disconnected)
1712 Exim did stdio operations after fclose. This was exposed by a recent
1713 change which nulled out the file handle after the fclose.
1715 JH/32 Bug 1909: Fix OCSP proof verification for cases where the proof is
1716 signed directly by the cert-signing cert, rather than an intermediate
1717 OCSP-signing cert. This is the model used by LetsEncrypt.
1719 JH/33 Bug 1914: Ensure socket is nonblocking before draining after SMTP QUIT.
1721 HS/01 Fix leak in verify callout under GnuTLS, about 3MB per recipient on
1722 an incoming connection.
1724 HS/02 Bug 1802: Do not half-close the connection after sending a request
1727 HS/03 Use "auto" as the default EC curve parameter. For OpenSSL < 1.0.2
1728 fallback to "prime256v1".
1730 JH/34 SECURITY: Use proper copy of DATA command in error message.
1731 Could leak key material. Remotely exploitable. CVE-2016-9963.
1737 JH/01 Bug 1664: Disable OCSP for GnuTLS library versions at/before 3.3.16
1738 and 3.4.4 - once the server is enabled to respond to an OCSP request
1739 it does even when not requested, resulting in a stapling non-aware
1740 client dropping the TLS connection.
1742 TF/01 Code cleanup: Overhaul the debug_selector and log_selector machinery to
1743 support variable-length bit vectors. No functional change.
1745 TF/02 Improve the consistency of logging incoming and outgoing interfaces.
1746 The I= interface field on outgoing lines is now after the H= remote
1747 host field, same as incoming lines. There is a separate
1748 outgoing_interface log selector which allows you to disable the
1751 JH/02 Bug 728: Close logfiles after a daemon-process "exceptional" log write.
1752 If not running log_selector +smtp_connection the mainlog would be held
1753 open indefinitely after a "too many connections" event, including to a
1754 deleted file after a log rotate. Leave the per net connection logging
1755 leaving it open for efficiency as that will be quickly detected by the
1756 check on the next write.
1758 HS/01 Bug 1671: Fix post transport crash.
1759 Processing the wait-<transport> messages could crash the delivery
1760 process if the message IDs didn't exist for some reason. When
1761 using 'split_spool_directory=yes' the construction of the spool
1762 file name failed already, exposing the same netto behaviour.
1764 JH/03 Bug 425: Capture substrings in $regex1, $regex2 etc from regex &
1765 mime_regex ACL conditions.
1767 JH/04 Bug 1686: When compiled with EXPERIMENTAL_DSN_INFO: Add extra information
1768 to DSN fail messages (bounces): remote IP, remote greeting, remote response
1769 to HELO, local diagnostic string.
1771 JH/05 Downgrade message for a TLS-certificate-based authentication fail from
1772 log line to debug. Even when configured with a tls authenticator many
1773 client connections are expected to not authenticate in this way, so
1774 an authenticate fail is not an error.
1776 HS/02 Add the Exim version string to the process info. This way exiwhat
1777 gives some more detail about the running daemon.
1779 JH/06 Bug 1395: time-limit caching of DNS lookups, to the TTL value. This may
1780 matter for fast-change records such as DNSBLs.
1782 JH/07 Bug 1678: Always record an interface option value, if set, as part of a
1783 retry record, even if constant. There may be multiple transports with
1784 different interface settings and the retry behaviour needs to be kept
1787 JH/08 Bug 1586: exiqgrep now refuses to run if there are unexpected arguments.
1789 JH/09 Bug 1700: ignore space & tab embedded in base64 during decode.
1791 JH/10 Bug 840: fix log_defer_output option of pipe transport
1793 JH/11 Bug 830: use same host for all RCPTS of a message, even under
1794 hosts_randomize. This matters a lot when combined with mua_wrapper.
1796 JH/12 Bug 1706: percent and underbar characters are no longer escaped by the
1797 ${quote_pgsql:<string>} operator.
1799 JH/13 Bug 1708: avoid misaligned access in cached lookup.
1801 JH/14 Change header file name for freeradius-client. Relevant if compiling
1802 with Radius support; from the Gentoo tree and checked under Fedora.
1804 JH/15 Bug 1712: Introduce $prdr_requested flag variable
1806 JH/16 Bug 1714: Permit an empty string as expansion result for transport
1807 option transport_filter, meaning no filtering.
1809 JH/17 Bug 1713: Fix non-PDKIM_DEBUG build. Patch from Jasen Betts.
1811 JH/18 Bug 1709: When built with TLS support, the tls_advertise_hosts option now
1812 defaults to "*" (all hosts). The variable is now available when not built
1813 with TLS, default unset, mainly to enable keeping the testsuite sane.
1814 If a server certificate is not supplied (via tls_certificate) an error is
1815 logged, and clients will find TLS connections fail on startup. Presumably
1816 they will retry in-clear.
1817 Packagers of Exim are strongly encouraged to create a server certificate
1818 at installation time.
1820 HS/03 Add -bP config_file as a synonym for -bP configure_file, for consistency
1821 with the $config_file variable.
1823 JH/19 Two additional event types: msg:rcpt:defer and msg:rcpt:host:defer. Both
1824 in transport context, after the attempt, and per-recipient. The latter type
1825 is per host attempted. The event data is the error message, and the errno
1826 information encodes the lookup type (A vs. MX) used for the (first) host,
1827 and the trailing two digits of the smtp 4xx response.
1829 GF/01 Bug 1715: Fix for race condition in exicyclog, where exim could attempt
1830 to write to mainlog (or rejectlog, paniclog) in the window between file
1831 creation and permissions/ownership being changed. Particularly affects
1832 installations where exicyclog is run as root, rather than exim user;
1833 result is that the running daemon panics and dies.
1835 JH/20 Bug 1701: For MySQL lookups, support MySQL config file option group names.
1837 JH/21 Bug 1720: Add support for priority groups and weighted-random proxy
1838 selection for the EXPERIMENTAL_SOCKS feature, via new per-proxy options
1839 "pri" and "weight". Note that the previous implicit priority given by the
1840 list order is no longer honoured.
1842 JH/22 Bugs 963, 1721: Fix some corner cases in message body canonicalization
1843 for DKIM processing.
1845 JH/23 Move SOCKS5 support from Experimental to mainline, enabled for a build
1846 by defining SUPPORT_SOCKS.
1848 JH/26 Move PROXY support from Experimental to mainline, enabled for a build
1849 by defining SUPPORT_PROXY. Note that the proxy_required_hosts option
1850 is renamed to hosts_proxy, and the proxy_{host,target}_{address,port}.
1851 variables are renamed to proxy_{local,external}_{address,port}.
1853 JH/27 Move Internationalisation support from Experimental to mainline, enabled
1854 for a build by defining SUPPORT_I18N
1856 JH/28 Bug 1745: Fix redis lookups to handle (quoted) spaces embedded in parts
1857 of the query string, and make ${quote_redis:} do that quoting.
1859 JH/29 Move Events support from Experimental to mainline, enabled by default
1860 and removable for a build by defining DISABLE_EVENT.
1862 JH/30 Updated DANE implementation code to current from Viktor Dukhovni.
1864 JH/31 Fix bug with hosts_connection_nolog and named-lists which were wrongly
1865 cached by the daemon.
1867 JH/32 Move Redis support from Experimental to mainline, enabled for a build
1868 by defining LOOKUP_REDIS. The libhiredis library is required.
1870 JH/33 Bug 1748: Permit ACL dnslists= condition in non-smtp ACLs if explicit
1871 keys are given for lookup.
1873 JH/34 Bug 1192: replace the embedded copy of PolarSSL RSA routines in the DKIM
1874 support, by using OpenSSL or GnuTLS library ones. This means DKIM is
1875 only supported when built with TLS support. The PolarSSL SHA routines
1876 are still used when the TLS library is too old for convenient support.
1878 JH/35 Require SINGLE_DH_USE by default in OpenSSL (main config option
1879 openssl_options), for security. OpenSSL forces this from version 1.1.0
1880 server-side so match that on older versions.
1882 JH/36 Bug 1778: longstanding bug in memory use by the ${run } expansion: A fresh
1883 allocation for $value could be released as the expansion processing
1884 concluded, but leaving the global pointer active for it.
1886 JH/37 Bug 1769: Permit a VRFY ACL to override the default 252 response,
1887 and to use the domains and local_parts ACL conditions.
1889 JH/38 Fix cutthrough bug with body lines having a single dot. The dot was
1890 incorrectly not doubled on cutthrough transmission, hence seen as a
1891 body-termination at the receiving system - resulting in truncated mails.
1892 Commonly the sender saw a TCP-level error, and retransmitted the message
1893 via the normal store-and-forward channel. This could result in duplicates
1894 received - but deduplicating mailstores were liable to retain only the
1895 initial truncated version.
1897 JH/39 Bug 1781: Fix use of DKIM private-keys having trailing '=' in the base-64.
1899 JH/40 Fix crash in queryprogram router when compiled with EXPERIMENTAL_SRS.
1901 JH/41 Bug 1792: Fix selection of headers to sign for DKIM: bottom-up. While
1902 we're in there, support oversigning also; bug 1309.
1904 JH/42 Bug 1796: Fix error logged on a malware scanner connection failure.
1906 HS/04 Add support for keep_environment and add_environment options.
1908 JH/43 Tidy coding issues detected by gcc --fsanitize=undefined. Some remain;
1909 either intentional arithmetic overflow during PRNG, or testing config-
1912 JH/44 Bug 1800: The combination of a -bhc commandline option and cutthrough
1913 delivery resulted in actual delivery. Cancel cutthrough before DATA
1916 JH/45 Fix cutthrough, when connection not opened by verify and target hard-
1917 rejects a recipient: pass the reject to the originator.
1919 JH/46 Multiple issues raised by Coverity. Some were obvious or plausible bugs.
1920 Many were false-positives and ignorable, but it's worth fixing the
1923 JH/47 Fix build on HP-UX and older Solaris, which need (un)setenv now also
1924 for the new environment-manipulation done at startup. Move the routines
1925 from being local to tls.c to being global via the os.c file.
1927 JH/48 Bug 1807: Fix ${extract } for the numeric/3-string case. While preparsing
1928 an extract embedded as result-arg for a map, the first arg for extract
1929 is unavailable so we cannot tell if this is a numbered or keyed
1930 extraction. Accept either.
1936 JH/01 Bug 1545: The smtp transport option "retry_include_ip_address" is now
1939 JH/02 The smtp transport option "multi_domain" is now expanded.
1941 JH/03 The smtp transport now requests PRDR by default, if the server offers
1944 JH/04 Certificate name checking on server certificates, when exim is a client,
1945 is now done by default. The transport option tls_verify_cert_hostnames
1946 can be used to disable this per-host. The build option
1947 EXPERIMENTAL_CERTNAMES is withdrawn.
1949 JH/05 The value of the tls_verify_certificates smtp transport and main options
1950 default to the word "system" to access the system default CA bundle.
1951 For GnuTLS, only version 3.0.20 or later.
1953 JH/06 Verification of the server certificate for a TLS connection is now tried
1954 (but not required) by default. The verification status is now logged by
1955 default, for both outbound TLS and client-certificate supplying inbound
1958 JH/07 Changed the default rfc1413 lookup settings to disable calls. Few
1961 JH/08 The EXPERIMENTAL_DSN compile option is no longer needed; all Delivery
1962 Status Notification (bounce) messages are now MIME format per RFC 3464.
1963 Support for RFC 3461 DSN options NOTIFY,ENVID,RET,ORCPT can be advertised
1964 under the control of the dsn_advertise_hosts option, and routers may
1965 have a dsn_lasthop option.
1967 JH/09 A timeout of 2 minutes is now applied to all malware scanner types by
1968 default, modifiable by a malware= option. The list separator for
1969 the options can now be changed in the usual way. Bug 68.
1971 JH/10 The smtp_receive_timeout main option is now expanded before use.
1973 JH/11 The incoming_interface log option now also enables logging of the
1974 local interface on delivery outgoing connections.
1976 JH/12 The cutthrough-routing facility now supports multi-recipient mails,
1977 if the interface and destination host and port all match.
1979 JH/13 Bug 344: The verify = reverse_host_lookup ACL condition now accepts a
1982 JH/14 Bug 1573: The spam= ACL condition now additionally supports Rspamd.
1983 Patch from Andrew Lewis.
1985 JH/15 Bug 670: The spamd_address main option (for the spam= ACL condition)
1986 now supports optional time-restrictions, weighting, and priority
1987 modifiers per server. Patch originally by <rommer@active.by>.
1989 JH/16 The spamd_address main option now supports a mixed list of local
1990 and remote servers. Remote servers can be IPv6 addresses, and
1991 specify a port-range.
1993 JH/17 Bug 68: The spamd_address main option now supports an optional
1994 timeout value per server.
1996 JH/18 Bug 1581: Router and transport options headers_add/remove can
1997 now have the list separator specified.
1999 JH/19 Bug 392: spamd_address, and clamd av_scanner, now support retry
2002 JH/20 Bug 1571: Ensure that $tls_in_peerdn is set, when verification fails
2005 JH/21 Support for the A6 type of dns record is withdrawn.
2007 JH/22 Bug 608: The result of a QUIT or not-QUIT toplevel ACL now matters
2008 rather than the verbs used.
2010 JH/23 Bug 1572: Increase limit on SMTP confirmation message copy size
2011 from 255 to 1024 chars.
2013 JH/24 Verification callouts now attempt to use TLS by default.
2015 HS/01 DNSSEC options (dnssec_require_domains, dnssec_request_domains)
2016 are generic router options now. The defaults didn't change.
2018 JH/25 Bug 466: Add RFC2322 support for MIME attachment filenames.
2019 Original patch from Alexander Shikoff, worked over by JH.
2021 HS/02 Bug 1575: exigrep falls back to autodetection of compressed
2022 files if ZCAT_COMMAND is not executable.
2024 JH/26 Bug 1539: Add timeout/retry options on dnsdb lookups.
2026 JH/27 Bug 286: Support SOA lookup in dnsdb lookups.
2028 JH/28 Bug 1588: Do not use the A lookup following an AAAA for setting the FQDN.
2029 Normally benign, it bites when the pair was led to by a CNAME;
2030 modern usage is to not canonicalize the domain to a CNAME target
2031 (and we were inconsistent anyway for A-only vs AAAA+A).
2033 JH/29 Bug 1632: Removed the word "rejected" from line logged for ACL discards.
2035 JH/30 Check the forward DNS lookup for DNSSEC, in addition to the reverse,
2036 when evaluating $sender_host_dnssec.
2038 JH/31 Check the HELO verification lookup for DNSSEC, adding new
2039 $sender_helo_dnssec variable.
2041 JH/32 Bug 1397: Enable ECDHE on OpenSSL, just the NIST P-256 curve.
2043 JH/33 Bug 1346: Note MAIL cmd seen in -bS batch, to avoid smtp_no_mail log.
2045 JH/34 Bug 1648: Fix a memory leak seen with "mailq" and large queues.
2047 JH/35 Bug 1642: Fix support of $spam_ variables at delivery time. Was
2048 documented as working, but never had. Support all but $spam_report.
2050 JH/36 Bug 1659: Guard checking of input smtp commands again pseudo-command
2051 added for tls authenticator.
2053 HS/03 Add perl_taintmode main config option
2059 TL/01 When running the test suite, the README says that variables such as
2060 no_msglog_check are global and can be placed anywhere in a specific
2061 test's script, however it was observed that placement needed to be near
2062 the beginning for it to behave that way. Changed the runtest perl
2063 script to read through the entire script once to detect and set these
2064 variables, reset to the beginning of the script, and then run through
2065 the script parsing/test process like normal.
2067 TL/02 The BSD's have an arc4random API. One of the functions to induce
2068 adding randomness was arc4random_stir(), but it has been removed in
2069 OpenBSD 5.5. Detect this OpenBSD version and skip calling this
2070 function when detected.
2072 JH/01 Expand the EXPERIMENTAL_TPDA feature. Several different events now
2073 cause callback expansion.
2075 TL/03 Bugzilla 1518: Clarify "condition" processing in routers; that
2076 syntax errors in an expansion can be treated as a string instead of
2077 logging or causing an error, due to the internal use of bool_lax
2078 instead of bool when processing it.
2080 JH/02 Add EXPERIMENTAL_DANE, allowing for using the DNS as trust-anchor for
2081 server certificates when making smtp deliveries.
2083 JH/03 Support secondary-separator specifier for MX, SRV, TLSA lookups.
2085 JH/04 Add ${sort {list}{condition}{extractor}} expansion item.
2087 TL/04 Bugzilla 1216: Add -M (related messages) option to exigrep.
2089 TL/05 GitHub Issue 18: Adjust logic testing for true/false in redis lookups.
2090 Merged patch from Sebastian Wiedenroth.
2092 JH/05 Fix results-pipe from transport process. Several recipients, combined
2093 with certificate use, exposed issues where response data items split
2094 over buffer boundaries were not parsed properly. This eventually
2095 resulted in duplicates being sent. This issue only became common enough
2096 to notice due to the introduction of connection certificate information,
2097 the item size being so much larger. Found and fixed by Wolfgang Breyha.
2099 JH/06 Bug 1533: Fix truncation of items in headers_remove lists. A fixed
2100 size buffer was used, resulting in syntax errors when an expansion
2103 JH/07 Add support for directories of certificates when compiled with a GnuTLS
2104 version 3.3.6 or later.
2106 JH/08 Rename the TPDA experimental facility to Event Actions. The #ifdef
2107 is EXPERIMENTAL_EVENT, the main-configuration and transport options
2108 both become "event_action", the variables become $event_name, $event_data
2109 and $event_defer_errno. There is a new variable $verify_mode, usable in
2110 routers, transports and related events. The tls:cert event is now also
2111 raised for inbound connections, if the main configuration event_action
2114 TL/06 In test suite, disable OCSP for old versions of openssl which contained
2115 early OCSP support, but no stapling (appears to be less than 1.0.0).
2117 JH/09 When compiled with OpenSSL and EXPERIMENTAL_CERTNAMES, the checks on
2118 server certificate names available under the smtp transport option
2119 "tls_verify_cert_hostname" now do not permit multi-component wildcard
2122 JH/10 Time-related extraction expansions from certificates now use the main
2123 option "timezone" setting for output formatting, and are consistent
2124 between OpenSSL and GnuTLS compilations. Bug 1541.
2126 JH/11 Fix a crash in mime ACL when meeting a zero-length, quoted or RFC2047-
2127 encoded parameter in the incoming message. Bug 1558.
2129 JH/12 Bug 1527: Autogrow buffer used in reading spool files. Since they now
2130 include certificate info, eximon was claiming there were spoolfile
2133 JH/13 Bug 1521: Fix ldap lookup for single-attr request, multiple-attr return.
2135 JH/14 Log delivery-related information more consistently, using the sequence
2136 "H=<name> [<ip>]" wherever possible.
2138 TL/07 Bug 1547: Omit RFCs from release. Draft and RFCs have licenses which
2139 are problematic for Debian distribution, omit them from the release
2142 JH/15 Updates and fixes to the EXPERIMENTAL_DSN feature.
2144 JH/16 Fix string representation of time values on 64bit time_t architectures.
2147 JH/17 Fix a null-indirection in certextract expansions when a nondefault
2148 output list separator was used.
2153 TL/01 Bugzilla 1506: Re-add a 'return NULL' to silence complaints from static
2154 checkers that were complaining about end of non-void function with no
2157 JH/01 Bug 1513: Fix parsing of quoted parameter values in MIME headers.
2158 This was a regression introduced in 4.83 by another bugfix.
2160 JH/02 Fix broken compilation when EXPERIMENTAL_DSN is enabled.
2162 TL/02 Bug 1509: Fix exipick for enhanced spoolfile specification used when
2163 EXPERIMENTAL_DSN is enabled. Fix from Wolfgang Breyha.
2169 TF/01 Correctly close the server side of TLS when forking for delivery.
2171 When a message was received over SMTP with TLS, Exim failed to clear up
2172 the incoming connection properly after forking off the child process to
2173 deliver the message. In some situations the subsequent outgoing
2174 delivery connection happened to have the same fd number as the incoming
2175 connection previously had. Exim would try to use TLS and fail, logging
2176 a "Bad file descriptor" error.
2178 TF/02 Portability fix for building lookup modules on Solaris when the xpg4
2179 utilities have not been installed.
2181 JH/01 Fix memory-handling in use of acl as a conditional; avoid free of
2182 temporary space as the ACL may create new global variables.
2184 TL/01 LDAP support uses per connection or global context settings, depending
2185 upon the detected version of the libraries at build time.
2187 TL/02 Experimental Proxy Protocol support: allows a proxied SMTP connection
2188 to extract and use the src ip:port in logging and expansions as if it
2189 were a direct connection from the outside internet. PPv2 support was
2190 updated based on HAProxy spec change in May 2014.
2192 JH/02 Add ${listextract {number}{list}{success}{fail}}.
2194 TL/03 Bugzilla 1433: Fix DMARC SEGV with specific From header contents.
2195 Properly escape header and check for NULL return.
2197 PP/01 Continue incomplete 4.82 PP/19 by fixing docs too: use dns_dnssec_ok
2200 JH/03 Bugzilla 1157: support log_selector smtp_confirmation for lmtp.
2202 TL/04 Add verify = header_names_ascii check to reject email with non-ASCII
2203 characters in header names, implemented as a verify condition.
2204 Contributed by Michael Fischer v. Mollard.
2206 TL/05 Rename SPF condition results err_perm and err_temp to standardized
2207 results permerror and temperror. Previous values are deprecated but
2208 still accepted. In a future release, err_perm and err_temp will be
2209 completely removed, which will be a backward incompatibility if the
2210 ACL tests for either of these two old results. Patch contributed by
2211 user bes-internal on the mailing list.
2213 JH/04 Add ${utf8clean:} operator. Contributed by Alex Rau.
2215 JH/05 Bugzilla 305: Log incoming-TLS details on rejects, subject to log
2216 selectors, in both main and reject logs.
2218 JH/06 Log outbound-TLS and port details, subject to log selectors, for a
2221 JH/07 Add malware type "sock" for talking to simple daemon.
2223 JH/08 Bugzilla 1371: Add tls_{,try_}verify_hosts to smtp transport.
2225 JH/09 Bugzilla 1431: Support (with limitations) headers_add/headers_remove in
2226 routers/transports under cutthrough routing.
2228 JH/10 Bugzilla 1005: ACL "condition =" should accept values which are negative
2229 numbers. Touch up "bool" conditional to keep the same definition.
2231 TL/06 Remove duplicated language in spec file from 4.82 TL/16.
2233 JH/11 Add dnsdb tlsa lookup. From Todd Lyons.
2235 JH/12 Expand items in router/transport headers_add or headers_remove lists
2236 individually rather than the list as a whole. Bug 1452.
2238 Required for reasonable handling of multiple headers_ options when
2239 they may be empty; requires that headers_remove items with embedded
2240 colons must have them doubled (or the list-separator changed).
2242 TL/07 Add new dmarc expansion variable $dmarc_domain_policy to directly
2243 view the policy declared in the DMARC record. Currently, $dmarc_status
2244 is a combined value of both the record presence and the result of the
2247 JH/13 Fix handling of $tls_cipher et.al. in (non-verify) transport. Bug 1455.
2249 JH/14 New options dnssec_request_domains, dnssec_require_domains on the
2250 dnslookup router and the smtp transport (applying to the forward
2253 TL/08 Bugzilla 1453: New LDAP "SERVERS=" option allows admin to override list
2254 of ldap servers used for a specific lookup. Patch provided by Heiko
2257 JH/18 New options dnssec_lax, dnssec_strict on dnsdb lookups.
2258 New variable $lookup_dnssec_authenticated for observability.
2260 TL/09 Bugzilla 609: Add -C option to exiqgrep, specify which exim.conf to use.
2261 Patch submitted by Lars Timman.
2263 JH/19 EXPERIMENTAL_OCSP support under GnuTLS. Bug 1459.
2265 TL/10 Bugzilla 1454: New -oMm option to pass message reference to Exim.
2266 Requires trusted mode and valid format message id, aborts otherwise.
2267 Patch contributed by Heiko Schlichting.
2269 JH/20 New expansion variables tls_(in,out)_(our,peer)cert, and expansion item
2270 certextract with support for various fields. Bug 1358.
2272 JH/21 Observability of OCSP via variables tls_(in,out)_ocsp. Stapling
2273 is requested by default, modifiable by smtp transport option
2276 JH/22 Expansion operators ${md5:string} and ${sha1:string} can now
2277 operate on certificate variables to give certificate fingerprints
2278 Also new ${sha256:cert_variable}.
2280 JH/23 The PRDR feature is moved from being Experimental into the mainline.
2282 TL/11 Bug 1119: fix memory allocation in string_printing2(). Patch from
2283 Christian Aistleitner.
2285 JH/24 The OCSP stapling feature is moved from Experimental into the mainline.
2287 TL/12 Bug 1444: Fix improper \r\n sequence handling when writing spool
2288 file. Patch from Wolfgang Breyha.
2290 JH/25 Expand the coverage of the delivery $host and $host_address to
2291 client authenticators run in verify callout. Bug 1476.
2293 JH/26 Port service names are now accepted for tls_on_connect_ports, to
2294 align with daemon_smtp_ports. Bug 72.
2296 TF/03 Fix udpsend. The ip_connectedsocket() function's socket type
2297 support and error reporting did not work properly.
2299 TL/13 Bug 1495: Exiqgrep check if -C config file specified on cli exists
2300 and is readable. Patch from Andrew Colin Kissa.
2302 TL/14 Enhance documentation of ${run expansion and how it parses the
2303 commandline after expansion, particularly in the case when an
2304 unquoted variable expansion results in an empty value.
2306 JH/27 The TLS SNI feature was broken in 4.82. Fix it.
2308 PP/02 Fix internal collision of T_APL on systems which support RFC3123
2309 by renaming away from it. Addresses GH issue 15, reported by
2312 JH/28 Fix parsing of MIME headers for parameters with quoted semicolons.
2314 TL/15 SECURITY: prevent double expansion in math comparison functions
2315 (can expand unsanitized data). Not remotely exploitable.
2322 PP/01 Add -bI: framework, and -bI:sieve for querying sieve capabilities.
2324 PP/02 Make -n do something, by making it not do something.
2325 When combined with -bP, the name of an option is not output.
2327 PP/03 Added tls_dh_min_bits SMTP transport driver option, only honoured
2330 PP/04 First step towards DNSSEC, provide $sender_host_dnssec for
2331 $sender_host_name and config options to manage this, and basic check
2334 PP/05 DSCP support for outbound connections and control modifier for inbound.
2336 PP/06 Cyrus SASL: set local and remote IP;port properties for driver.
2337 (Only plugin which currently uses this is kerberos4, which nobody should
2338 be using, but we should make it available and other future plugins might
2339 conceivably use it, even though it would break NAT; stuff *should* be
2340 using channel bindings instead).
2342 PP/07 Handle "exim -L <tag>" to indicate to use syslog with tag as the process
2343 name; added for Sendmail compatibility; requires admin caller.
2344 Handle -G as equivalent to "control = suppress_local_fixups" (we used to
2345 just ignore it); requires trusted caller.
2346 Also parse but ignore: -Ac -Am -X<logfile>
2349 TL/01 Bugzilla 1258 - Refactor MAIL FROM optional args processing.
2351 TL/02 Add +smtp_confirmation as a default logging option.
2353 TL/03 Bugzilla 198 - Implement remove_header ACL modifier.
2354 Patch by Magnus Holmgren from 2007-02-20.
2356 TL/04 Bugzilla 1281 - Spec typo.
2357 Bugzilla 1283 - Spec typo.
2358 Bugzilla 1290 - Spec grammar fixes.
2360 TL/05 Bugzilla 1285 - Spec omission, fix docbook errors for spec.txt creation.
2362 TL/06 Add Experimental DMARC support using libopendmarc libraries.
2364 TL/07 Fix an out of order global option causing a segfault. Reported to dev
2365 mailing list by by Dmitry Isaikin.
2367 JH/01 Bugzilla 1201 & 304 - New cutthrough-delivery feature, with TLS support.
2369 JH/02 Support "G" suffix to numbers in ${if comparisons.
2371 PP/08 Handle smtp transport tls_sni option forced-fail for OpenSSL.
2373 NM/01 Bugzilla 1197 - Spec typo
2374 Bugzilla 1196 - Spec examples corrections
2376 JH/03 Add expansion operators ${listnamed:name} and ${listcount:string}
2378 PP/09 Add gnutls_allow_auto_pkcs11 option (was originally called
2379 gnutls_enable_pkcs11, but renamed to more accurately indicate its
2382 PP/10 Let Linux makefile inherit CFLAGS/CFLAGS_DYNAMIC.
2383 Pulled from Debian 30_dontoverridecflags.dpatch by Andreas Metzler.
2385 JH/04 Add expansion item ${acl {name}{arg}...}, expansion condition
2386 "acl {{name}{arg}...}", and optional args on acl condition
2389 JH/05 Permit multiple router/transport headers_add/remove lines.
2391 JH/06 Add dnsdb pseudo-lookup "a+" to do an "aaaa" + "a" combination.
2393 JH/07 Avoid using a waiting database for a single-message-only transport.
2394 Performance patch from Paul Fisher. Bugzilla 1262.
2396 JH/08 Strip leading/trailing newlines from add_header ACL modifier data.
2399 JH/09 Add $headers_added variable, with content from use of ACL modifier
2400 add_header (but not yet added to the message). Bugzilla 199.
2402 JH/10 Add 8bitmime log_selector, for 8bitmime status on the received line.
2403 Pulled from Bugzilla 817 by Wolfgang Breyha.
2405 PP/11 SECURITY: protect DKIM DNS decoding from remote exploit.
2407 (nb: this is the same fix as in Exim 4.80.1)
2409 JH/11 Add A= logging on delivery lines, and a client_set_id option on
2412 JH/12 Add optional authenticated_sender logging to A= and a log_selector
2415 PP/12 Unbreak server_set_id for NTLM/SPA auth, broken by 4.80 PP/29.
2417 PP/13 Dovecot auth: log better reason to rejectlog if Dovecot did not
2418 advertise SMTP AUTH mechanism to us, instead of a generic
2419 protocol violation error. Also, make Exim more robust to bad
2420 data from the Dovecot auth socket.
2422 TF/01 Fix ultimate retry timeouts for intermittently deliverable recipients.
2424 When a queue runner is handling a message, Exim first routes the
2425 recipient addresses, during which it prunes them based on the retry
2426 hints database. After that it attempts to deliver the message to
2427 any remaining recipients. It then updates the hints database using
2430 So if a recipient address works intermittently, it can get repeatedly
2431 deferred at routing time. The retry hints record remains fresh so the
2432 address never reaches the final cutoff time.
2434 This is a fairly common occurrence when a user is bumping up against
2435 their storage quota. Exim had some logic in its local delivery code
2436 to deal with this. However it did not apply to per-recipient defers
2437 in remote deliveries, e.g. over LMTP to a separate IMAP message store.
2439 This change adds a proper retry rule check during routing so that the
2440 final cutoff time is checked against the message's age. We only do
2441 this check if there is an address retry record and there is not a
2442 domain retry record; this implies that previous attempts to handle
2443 the address had the retry_use_local_parts option turned on. We use
2444 this as an approximation for the destination being like a local
2445 delivery, as in LMTP.
2447 I suspect this new check makes the old local delivery cutoff check
2448 redundant, but I have not verified this so I left the code in place.
2450 TF/02 Correct gecos expansion when From: is a prefix of the username.
2452 Test 0254 submits a message to Exim with the header
2456 When I ran the test suite under the user fanf2, Exim expanded
2457 the header to contain my full name, whereas it should have added
2458 a Resent-Sender: header. It erroneously treats any prefix of the
2459 username as equal to the username.
2461 This change corrects that bug.
2463 GF/01 DCC debug and logging tidyup
2464 Error conditions log to paniclog rather than rejectlog.
2465 Debug lines prefixed by "DCC: " to remove any ambiguity.
2467 TF/03 Avoid unnecessary rebuilds of lookup-related code.
2469 PP/14 Fix OCSP reinitialisation in SNI handling for Exim/TLS as server.
2470 Bug spotted by Jeremy Harris; was flawed since initial commit.
2471 Would have resulted in OCSP responses post-SNI triggering an Exim
2472 NULL dereference and crash.
2474 JH/13 Add $router_name and $transport_name variables. Bugzilla 308.
2476 PP/15 Define SIOCGIFCONF_GIVES_ADDR for GNU Hurd.
2477 Bug detection, analysis and fix by Samuel Thibault.
2478 Bugzilla 1331, Debian bug #698092.
2480 SC/01 Update eximstats to watch out for senders sending 'HELO [IpAddr]'
2482 JH/14 SMTP PRDR (http://www.eric-a-hall.com/specs/draft-hall-prdr-00.txt).
2483 Server implementation by Todd Lyons, client by JH.
2484 Only enabled when compiled with EXPERIMENTAL_PRDR. A new
2485 config variable "prdr_enable" controls whether the server
2486 advertises the facility. If the client requests PRDR a new
2487 acl_data_smtp_prdr ACL is called once for each recipient, after
2488 the body content is received and before the acl_smtp_data ACL.
2489 The client is controlled by both of: a hosts_try_prdr option
2490 on the smtp transport, and the server advertisement.
2491 Default client logging of deliveries and rejections involving
2492 PRDR are flagged with the string "PRDR".
2494 PP/16 Fix problems caused by timeouts during quit ACLs trying to double
2495 fclose(). Diagnosis by Todd Lyons.
2497 PP/17 Update configure.default to handle IPv6 localhost better.
2498 Patch by Alain Williams (plus minor tweaks).
2501 PP/18 OpenSSL made graceful with empty tls_verify_certificates setting.
2502 This is now consistent with GnuTLS, and is now documented: the
2503 previous undocumented portable approach to treating the option as
2504 unset was to force an expansion failure. That still works, and
2505 an empty string is now equivalent.
2507 PP/19 Renamed DNSSEC-enabling option to "dns_dnssec_ok", to make it
2508 clearer that Exim is using the DO (DNSSEC OK) EDNS0 resolver flag,
2509 not performing validation itself.
2511 PP/20 Added force_command boolean option to pipe transport.
2512 Patch from Nick Koston, of cPanel Inc.
2514 JH/15 AUTH support on callouts (and hence cutthrough-deliveries).
2517 TF/04 Added udpsend ACL modifier and hexquote expansion operator
2519 PP/21 Fix eximon continuous updating with timestamped log-files.
2520 Broken in a format-string cleanup in 4.80, missed when I repaired the
2521 other false fix of the same issue.
2522 Report and fix from Heiko Schlichting.
2525 PP/22 Guard LDAP TLS usage against Solaris LDAP variant.
2526 Report from Prashanth Katuri.
2528 PP/23 Support safari_ecdhe_ecdsa_bug for openssl_options.
2529 It's SecureTransport, so affects any MacOS clients which use the
2530 system-integrated TLS libraries, including email clients.
2532 PP/24 Fix segfault from trying to fprintf() to a NULL stdio FILE* if
2533 using a MIME ACL for non-SMTP local injection.
2534 Report and assistance in diagnosis by Warren Baker.
2536 TL/08 Adjust exiqgrep to be case-insensitive for sender/receiver.
2538 JH/16 Fix comparisons for 64b. Bugzilla 1385.
2540 TL/09 Add expansion variable $authenticated_fail_id to keep track of
2541 last id that failed so it may be referenced in subsequent ACL's.
2543 TL/10 Bugzilla 1375 - Prevent TLS rebinding in ldap. Patch provided by
2546 TL/11 Bugzilla 1382 - Option ldap_require_cert overrides start_tls
2547 ldap library initialization, allowing self-signed CA's to be
2548 used. Also properly sets require_cert option later in code by
2549 using NULL (global ldap config) instead of ldap handle (per
2550 session). Bug diagnosis and testing by alxgomz.
2552 TL/12 Enhanced documentation in the ratelimit.pl script provided in
2553 the src/util/ subdirectory.
2555 TL/13 Bug 1031 - Imported transport SQL logging patch from Axel Rau
2556 renamed to Transport Post Delivery Action by Jeremy Harris, as
2559 TL/14 Bugzilla 1217 - Redis lookup support has been added. It is only enabled
2560 when Exim is compiled with EXPERIMENTAL_REDIS. A new config variable
2561 redis_servers = needs to be configured which will be used by the redis
2562 lookup. Patch from Warren Baker, of The Packet Hub.
2564 TL/15 Fix exiqsumm summary for corner case. Patch provided by Richard Hall.
2566 TL/16 Bugzilla 1289 - Clarify host/ip processing when have errors looking up a
2567 hostname or reverse DNS when processing a host list. Used suggestions
2568 from multiple comments on this bug.
2570 TL/17 Bugzilla 1057 - Multiple clamd TCP targets patch from Mark Zealey.
2572 TL/18 Had previously added a -CONTINUE option to runtest in the test suite.
2573 Missed a few lines, added it to make the runtest require no keyboard
2576 TL/19 Bugzilla 1402 - Test 533 fails if any part of the path to the test suite
2577 contains upper case chars. Make router use caseful_local_part.
2579 TL/20 Bugzilla 1400 - Add AVOID_GNUTLS_PKCS11 build option. Allows GnuTLS
2580 support when GnuTLS has been built with p11-kit.
2586 PP/01 SECURITY: protect DKIM DNS decoding from remote exploit.
2588 This, or similar/improved, will also be change PP/11 of 4.82.
2594 PP/01 Handle short writes when writing local log-files.
2595 In practice, only affects FreeBSD (8 onwards).
2596 Bugzilla 1053, with thanks to Dmitry Isaikin.
2598 NM/01 Bugzilla 949 - Documentation tweak
2600 NM/02 Bugzilla 1093 - eximstats DATA reject detection regexps
2603 NM/03 Bugzilla 1169 - primary_hostname spelling was incorrect in docs.
2605 PP/02 Implemented gsasl authenticator.
2607 PP/03 Implemented heimdal_gssapi authenticator with "server_keytab" option.
2609 PP/04 Local/Makefile support for (AUTH|LOOKUP)_*_PC=foo to use
2610 `pkg-config foo` for cflags/libs.
2612 PP/05 Swapped $auth1/$auth2 for gsasl GSSAPI mechanism, to be more consistent
2613 with rest of GSASL and with heimdal_gssapi.
2615 PP/06 Local/Makefile support for USE_(GNUTLS|OPENSSL)_PC=foo to use
2616 `pkg-config foo` for cflags/libs for the TLS implementation.
2618 PP/07 New expansion variable $tls_bits; Cyrus SASL server connection
2619 properties get this fed in as external SSF. A number of robustness
2620 and debugging improvements to the cyrus_sasl authenticator.
2622 PP/08 cyrus_sasl server now expands the server_realm option.
2624 PP/09 Bugzilla 1214 - Log authentication information in reject log.
2625 Patch by Jeremy Harris.
2627 PP/10 Added dbmjz lookup type.
2629 PP/11 Let heimdal_gssapi authenticator take a SASL message without an authzid.
2631 PP/12 MAIL args handles TAB as well as SP, for better interop with
2632 non-compliant senders.
2633 Analysis and variant patch by Todd Lyons.
2635 NM/04 Bugzilla 1237 - fix cases where printf format usage not indicated
2636 Bug report from Lars Müller <lars@samba.org> (via SUSE),
2637 Patch from Dirk Mueller <dmueller@suse.com>
2639 PP/13 tls_peerdn now print-escaped for spool files.
2640 Observed some $tls_peerdn in wild which contained \n, which resulted
2641 in spool file corruption.
2643 PP/14 TLS fixes for OpenSSL: support TLS 1.1 & 1.2; new "openssl_options"
2644 values; set SSL_MODE_AUTO_RETRY so that OpenSSL will retry a read
2645 or write after TLS renegotiation, which otherwise led to messages
2648 TK/01 Bugzilla 1239 - fix DKIM verification when signature was not inserted
2649 as a tracking header (ie: a signed header comes before the signature).
2650 Patch from Wolfgang Breyha.
2652 JH/01 Bugzilla 660 - Multi-valued attributes from ldap now parseable as a
2653 comma-sep list; embedded commas doubled.
2655 JH/02 Refactored ACL "verify =" logic to table-driven dispatch.
2657 PP/15 LDAP: Check for errors of TLS initialisation, to give correct
2659 Report and patch from Dmitry Banschikov.
2661 PP/16 Removed "dont_insert_empty_fragments" from "openssl_options".
2662 Removed SSL_clear() after SSL_new() which led to protocol negotiation
2663 failures. We appear to now support TLS1.1+ with Exim.
2665 PP/17 OpenSSL: new expansion var $tls_sni, which if used in tls_certificate
2666 lets Exim select keys and certificates based upon TLS SNI from client.
2667 Also option tls_sni on SMTP Transports. Also clear $tls_bits correctly
2668 before an outbound SMTP session. New log_selector, +tls_sni.
2670 PP/18 Bugzilla 1122 - check localhost_number expansion for failure, avoid
2671 NULL dereference. Report and patch from Alun Jones.
2673 PP/19 DNS resolver init changes for NetBSD compatibility. (Risk of breakage
2674 on less well tested platforms). Obviates NetBSD pkgsrc patch-ac.
2675 Not seeing resolver debug output on NetBSD, but suspect this is a
2676 resolver implementation change.
2678 PP/20 Revert part of NM/04, it broke log_path containing %D expansions.
2679 Left warnings. Added "eximon gdb" invocation mode.
2681 PP/21 Defaulting "accept_8bitmime" to true, not false.
2683 PP/22 Added -bw for inetd wait mode support.
2685 PP/23 Added PCRE_CONFIG=yes support to Makefile for using pcre-config to
2686 locate the relevant includes and libraries. Made this the default.
2688 PP/24 Fixed headers_only on smtp transports (was not sending trailing dot).
2689 Bugzilla 1246, report and most of solution from Tomasz Kusy.
2691 JH/03 ${eval } now uses 64-bit and supports a "g" suffix (like to "k" and "m").
2692 This may cause build issues on older platforms.
2694 PP/25 Revamped GnuTLS support, passing tls_require_ciphers to
2695 gnutls_priority_init, ignoring Exim options gnutls_require_kx,
2696 gnutls_require_mac & gnutls_require_protocols (no longer supported).
2697 Added SNI support via GnuTLS too.
2698 Made ${randint:..} supplier available, if using not-too-old GnuTLS.
2700 PP/26 Added EXPERIMENTAL_OCSP for OpenSSL.
2702 PP/27 Applied dnsdb SPF support patch from Janne Snabb.
2703 Applied second patch from Janne, implementing suggestion to default
2704 multiple-strings-in-record handling to match SPF spec.
2706 JH/04 Added expansion variable $tod_epoch_l for a higher-precision time.
2708 PP/28 Fix DCC dcc_header content corruption (stack memory referenced,
2709 read-only, out of scope).
2710 Patch from Wolfgang Breyha, report from Stuart Northfield.
2712 PP/29 Fix three issues highlighted by clang analyser static analysis.
2713 Only crash-plausible issue would require the Cambridge-specific
2714 iplookup router and a misconfiguration.
2715 Report from Marcin Mirosław.
2717 PP/30 Another attempt to deal with PCRE_PRERELEASE, this one less buggy.
2719 PP/31 %D in printf continues to cause issues (-Wformat=security), so for
2720 now guard some of the printf checks behind WANT_DEEPER_PRINTF_CHECKS.
2721 As part of this, removing so much warning spew let me fix some minor
2722 real issues in debug logging.
2724 PP/32 GnuTLS was always using default tls_require_ciphers, due to a missing
2725 assignment on my part. Fixed.
2727 PP/33 Added tls_dh_max_bits option, defaulting to current hard-coded limit
2728 of NSS, for GnuTLS/NSS interop. Problem root cause diagnosis by
2729 Janne Snabb (who went above and beyond: thank you).
2731 PP/34 Validate tls_require_ciphers on startup, since debugging an invalid
2732 string otherwise requires a connection and a bunch more work and it's
2733 relatively easy to get wrong. Should also expose TLS library linkage
2736 PP/35 Pull in <features.h> on Linux, for some portability edge-cases of
2737 64-bit ${eval} (JH/03).
2739 PP/36 Define _GNU_SOURCE in exim.h; it's needed for some releases of
2740 GNU libc to support some of the 64-bit stuff, should not lead to
2741 conflicts. Defined before os.h is pulled in, so if a given platform
2742 needs to override this, it can.
2744 PP/37 Unbreak Cyrus SASL auth: SSF retrieval was incorrect, Exim thought
2745 protection layer was required, which is not implemented.
2746 Bugzilla 1254, patch from Wolfgang Breyha.
2748 PP/38 Overhaul DH prime handling, supply RFC-specified DH primes as built
2749 into Exim, default to IKE id 23 from RFC 5114 (2048 bit). Make
2750 tls_dhparam take prime identifiers. Also unbreak combination of
2751 OpenSSL+DH_params+TLSSNI.
2753 PP/39 Disable SSLv2 by default in OpenSSL support.
2759 PP/01 Solaris build fix for Oracle's LDAP libraries.
2760 Bugzilla 1109, patch from Stephen Usher.
2762 TF/01 HP/UX build fix: avoid arithmetic on a void pointer.
2764 TK/01 DKIM Verification: Fix relaxed canon for empty headers w/o
2767 TF/02 Fix a couple more cases where we did not log the error message
2768 when unlink() failed. See also change 4.74-TF/03.
2770 TF/03 Make the exiwhat support code safe for signals. Previously Exim might
2771 lock up or crash if it happened to be inside a call to libc when it
2772 got a SIGUSR1 from exiwhat.
2774 The SIGUSR1 handler appends the current process status to the process
2775 log which is later printed by exiwhat. It used to use the general
2776 purpose logging code to do this, but several functions it calls are
2777 not safe for signals.
2779 The new output code in the SIGUSR1 handler is specific to the process
2780 log, and simple enough that it's easy to inspect for signal safety.
2781 Removing some special cases also simplifies the general logging code.
2782 Removing the spurious timestamps from the process log simplifies
2785 TF/04 Improved ratelimit ACL condition.
2787 The /noupdate option has been deprecated in favour of /readonly which
2788 has clearer semantics. The /leaky, /strict, and /readonly update modes
2789 are mutually exclusive. The update mode is no longer included in the
2790 database key; it just determines when the database is updated. (This
2791 means that when you upgrade Exim will forget old rate measurements.)
2793 Exim now checks that the per_* options are used with an update mode that
2794 makes sense for the current ACL. For example, when Exim is processing a
2795 message (e.g. acl_smtp_rcpt or acl_smtp_data, etc.) you can specify
2796 per_mail/leaky or per_mail/strict; otherwise (e.g. in acl_smtp_helo) you
2797 must specify per_mail/readonly. If you omit the update mode it defaults to
2798 /leaky where that makes sense (as before) or /readonly where required.
2800 The /noupdate option is now undocumented but still supported for
2801 backwards compatibility. It is equivalent to /readonly except that in
2802 ACLs where /readonly is required you may specify /leaky/noupdate or
2803 /strict/noupdate which are treated the same as /readonly.
2805 A useful new feature is the /count= option. This is a generalization
2806 of the per_byte option, so that you can measure the throughput of other
2807 aggregate values. For example, the per_byte option is now equivalent
2808 to per_mail/count=${if >{0}{$message_size} {0} {$message_size} }.
2810 The per_rcpt option has been generalized using the /count= mechanism
2811 (though it's more complicated than the per_byte equivalence). When it is
2812 used in acl_smtp_rcpt, the per_rcpt option adds recipients to the
2813 measured rate one at a time; if it is used later (e.g. in acl_smtp_data)
2814 or in a non-SMTP ACL it adds all the recipients in one go. (The latter
2815 /count=$recipients_count behaviour used to work only in non-SMTP ACLs.)
2816 Note that using per_rcpt with a non-readonly update mode in more than
2817 one ACL will cause the recipients to be double-counted. (The per_mail
2818 and per_byte options don't have this problem.)
2820 The handling of very low rates has changed slightly. If the computed rate
2821 is less than the event's count (usually one) then this event is the first
2822 after a long gap. In this case the rate is set to the same as this event's
2823 count, so that the first message of a spam run is counted properly.
2825 The major new feature is a mechanism for counting the rate of unique
2826 events. The new per_addr option counts the number of different
2827 recipients that someone has sent messages to in the last time period. It
2828 behaves like per_rcpt if all the recipient addresses are different, but
2829 duplicate recipient addresses do not increase the measured rate. Like
2830 the /count= option this is a general mechanism, so the per_addr option
2831 is equivalent to per_rcpt/unique=$local_part@$domain. You can, for
2832 example, measure the rate that a client uses different sender addresses
2833 with the options per_mail/unique=$sender_address. There are further
2834 details in the main documentation.
2836 TF/05 Removed obsolete $Cambridge$ CVS revision strings.
2838 TF/06 Removed a few PCRE remnants.
2840 TF/07 Automatically extract Exim's version number from tags in the git
2841 repository when doing development or release builds.
2843 PP/02 Raise smtp_cmd_buffer_size to 16kB.
2844 Bugzilla 879. Patch from Paul Fisher.
2846 PP/03 Implement SSL-on-connect outbound with protocol=smtps on smtp transport.
2847 Heavily based on revision 40f9a89a from Simon Arlott's tree.
2850 PP/04 Use .dylib instead of .so for dynamic library loading on MacOS.
2852 PP/05 Variable $av_failed, true if the AV scanner deferred.
2853 Bugzilla 1078. Patch from John Horne.
2855 PP/06 Stop make process more reliably on build failure.
2856 Bugzilla 1087. Patch from Heiko Schlittermann.
2858 PP/07 Make maildir_use_size_file an _expandable_ boolean.
2859 Bugzilla 1089. Patch from Heiko Schlittermann.
2861 PP/08 Handle ${run} returning more data than OS pipe buffer size.
2862 Bugzilla 1131. Patch from Holger Weiß.
2864 PP/09 Handle IPv6 addresses with SPF.
2865 Bugzilla 860. Patch from Wolfgang Breyha.
2867 PP/10 GnuTLS: support TLS 1.2 & 1.1.
2869 Use gnutls_certificate_verify_peers2() [patch from Andreas Metzler].
2872 PP/11 match_* no longer expand right-hand-side by default.
2873 New compile-time build option, EXPAND_LISTMATCH_RHS.
2874 New expansion conditions, "inlist", "inlisti".
2876 PP/12 fix uninitialised greeting string from PP/03 (smtps client support).
2878 PP/13 shell and compiler warnings fixes for RC1-RC4 changes.
2880 PP/14 fix log_write() format string regression from TF/03.
2881 Bugzilla 1152. Patch from Dmitry Isaikin.
2887 PP/01 The new ldap_require_cert option would segfault if used. Fixed.
2889 PP/02 Harmonised TLS library version reporting; only show if debugging.
2890 Layout now matches that introduced for other libraries in 4.74 PP/03.
2892 PP/03 New openssl_options items: no_sslv2 no_sslv3 no_ticket no_tlsv1
2894 PP/04 New "dns_use_edns0" global option.
2896 PP/05 Don't segfault on misconfiguration of ref:name exim-user as uid.
2899 PP/06 Extra paranoia around buffer usage at the STARTTLS transition.
2900 nb: Exim is not vulnerable to http://www.kb.cert.org/vuls/id/555316
2902 TK/01 Updated PolarSSL code to 0.14.2.
2903 Bugzilla 1097. Patch from Andreas Metzler.
2905 PP/07 Catch divide-by-zero in ${eval:...}.
2906 Fixes bugzilla 1102.
2908 PP/08 Condition negation of bool{}/bool_lax{} did not negate. Fixed.
2911 TK/02 Bugzilla 1106: CVE-2011-1764 - DKIM log line was subject to a
2912 format-string attack -- SECURITY: remote arbitrary code execution.
2914 TK/03 SECURITY - DKIM signature header parsing was double-expanded, second
2915 time unintentionally subject to list matching rules, letting the header
2916 cause arbitrary Exim lookups (of items which can occur in lists, *not*
2917 arbitrary string expansion). This allowed for information disclosure.
2919 PP/09 Fix another SIGFPE (x86) in ${eval:...} expansion, this time related to
2920 INT_MIN/-1 -- value coerced to INT_MAX.
2926 NM/01 Workaround for PCRE version dependency in version reporting
2929 TF/01 Update valgrind.h and memcheck.h to copies from valgrind-3.6.0.
2930 This fixes portability to compilers other than gcc, notably
2931 Solaris CC and HP-UX CC. Fixes Bugzilla 1050.
2933 TF/02 Bugzilla 139: Avoid using the += operator in the modular lookup
2934 makefiles for portability to HP-UX and POSIX correctness.
2936 PP/01 Permit LOOKUP_foo enabling on the make command-line.
2937 Also via indented variable definition in the Makefile.
2938 (Debugging by Oliver Heesakkers).
2940 PP/02 Restore caching of spamd results with expanded spamd_address.
2941 Patch from author of expandable spamd_address patch, Wolfgang Breyha.
2943 PP/03 Build issue: lookups-Makefile now exports LC_ALL=C
2944 Improves build reliability. Fix from: Frank Elsner
2946 NM/02 Fix wide character breakage in the rfc2047 coding
2947 Fixes bug 1064. Patch from Andrey N. Oktyabrski
2949 NM/03 Allow underscore in dnslist lookups
2950 Fixes bug 1026. Patch from Graeme Fowler
2952 PP/04 Bugzilla 230: Support TLS-enabled LDAP (in addition to ldaps).
2953 Code patches from Adam Ciarcinski of NetBSD.
2955 NM/04 Fixed exiqgrep to cope with mailq missing size issue
2958 PP/05 Bugzilla 1083: when lookup expansion defers, escape the output which
2959 is logged, to avoid truncation. Patch from John Horne.
2961 PP/06 Bugzilla 1042: implement freeze_signal on pipe transports.
2962 Patch from Jakob Hirsch.
2964 PP/07 Bugzilla 1061: restrict error messages sent over SMTP to not reveal
2965 SQL string expansion failure details.
2966 Patch from Andrey Oktyabrski.
2968 PP/08 Bugzilla 486: implement %M datestamping in log filenames.
2969 Patch from Simon Arlott.
2971 PP/09 New lookups functionality failed to compile on old gcc which rejects
2972 extern declarations in function scope.
2973 Patch from Oliver Fleischmann
2975 PP/10 Use sig_atomic_t for flags set from signal handlers.
2976 Check getgroups() return and improve debugging.
2977 Fixed developed for diagnosis in bug 927 (which turned out to be
2980 PP/11 Bugzilla 1055: Update $message_linecount for maildir_tag.
2981 Patch from Mark Zealey.
2983 PP/12 Bugzilla 1056: Improved spamd server selection.
2984 Patch from Mark Zealey.
2986 PP/13 Bugzilla 1086: Deal with maildir quota file races.
2987 Based on patch from Heiko Schlittermann.
2989 PP/14 Bugzilla 1019: DKIM multiple signature generation fix.
2990 Patch from Uwe Doering, sign-off by Michael Haardt.
2992 NM/05 Fix to spam.c to accommodate older gcc versions which dislike
2993 variable declaration deep within a block. Bug and patch from
2996 PP/15 lookups-Makefile IRIX compatibility coercion.
2998 PP/16 Make DISABLE_DKIM build knob functional.
3000 NM/06 Bugzilla 968: child_open_uid: restore default SIGPIPE handler
3001 Patch by Simon Arlott
3003 TF/03 Fix valgrind.h portability to C89 compilers that do not support
3004 variable argument macros. Our copy now differs from upstream.
3010 TF/01 Failure to get a lock on a hints database can have serious
3011 consequences so log it to the panic log.
3013 TF/02 Log LMTP confirmation messages in the same way as SMTP,
3014 controlled using the smtp_confirmation log selector.
3016 TF/03 Include the error message when we fail to unlink a spool file.
3018 DW/01 Bugzilla 139: Support dynamically loaded lookups as modules.
3019 With thanks to Steve Haslam, Johannes Berg & Serge Demonchaux
3020 for maintaining out-of-tree patches for some time.
3022 PP/01 Bugzilla 139: Documentation and portability issues.
3023 Avoid GNU Makefile-isms, let Exim continue to build on BSD.
3024 Handle per-OS dynamic-module compilation flags.
3026 PP/02 Let /dev/null have normal permissions.
3027 The 4.73 fixes were a little too stringent and complained about the
3028 permissions on /dev/null. Exempt it from some checks.
3029 Reported by Andreas M. Kirchwitz.
3031 PP/03 Report version information for many libraries, including
3032 Exim version information for dynamically loaded libraries. Created
3033 version.h, now support a version extension string for distributors
3034 who patch heavily. Dynamic module ABI change.
3036 PP/04 CVE-2011-0017 - check return value of setuid/setgid. This is a
3037 privilege escalation vulnerability whereby the Exim run-time user
3038 can cause root to append content of the attacker's choosing to
3041 PP/05 Bugzilla 1041: merged DCC maintainer's fixes for return code.
3044 PP/06 Bugzilla 1071: fix delivery logging with untrusted macros.
3045 If dropping privileges for untrusted macros, we disabled normal logging
3046 on the basis that it would fail; for the Exim run-time user, this is not
3047 the case, and it resulted in successful deliveries going unlogged.
3048 Fixed. Reported by Andreas Metzler.
3054 PP/01 Date: & Message-Id: revert to normally being appended to a message,
3055 only prepend for the Resent-* case. Fixes regression introduced in
3056 Exim 4.70 by NM/22 for Bugzilla 607.
3058 PP/02 Include check_rfc2047_length in configure.default because we're seeing
3059 increasing numbers of administrators be bitten by this.
3061 JJ/01 Added DISABLE_DKIM and comment to src/EDITME
3063 PP/03 Bugzilla 994: added openssl_options main configuration option.
3065 PP/04 Bugzilla 995: provide better SSL diagnostics on failed reads.
3067 PP/05 Bugzilla 834: provide a permit_coredump option for pipe transports.
3069 PP/06 Adjust NTLM authentication to handle SASL Initial Response.
3071 PP/07 If TLS negotiated an anonymous cipher, we could end up with SSL but
3072 without a peer certificate, leading to a segfault because of an
3073 assumption that peers always have certificates. Be a little more
3074 paranoid. Problem reported by Martin Tscholak.
3076 PP/08 Bugzilla 926: switch ClamAV to use the new zINSTREAM API for content
3077 filtering; old API available if built with WITH_OLD_CLAMAV_STREAM=yes
3078 NB: ClamAV planning to remove STREAM in "middle of 2010".
3079 CL also introduces -bmalware, various -d+acl logging additions and
3080 more caution in buffer sizes.
3082 PP/09 Implemented reverse_ip expansion operator.
3084 PP/10 Bugzilla 937: provide a "debug" ACL control.
3086 PP/11 Bugzilla 922: Documentation dusting, patch provided by John Horne.
3088 PP/12 Bugzilla 973: Implement --version.
3090 PP/13 Bugzilla 752: Refuse to build/run if Exim user is root/0.
3092 PP/14 Build without WITH_CONTENT_SCAN. Path from Andreas Metzler.
3094 PP/15 Bugzilla 816: support multiple condition rules on Routers.
3096 PP/16 Add bool_lax{} expansion operator and use that for combining multiple
3097 condition rules, instead of bool{}. Make both bool{} and bool_lax{}
3098 ignore trailing whitespace.
3100 JJ/02 prevent non-panic DKIM error from being sent to paniclog
3102 JJ/03 added tcp_wrappers_daemon_name to allow host entries other than
3105 PP/17 Fix malware regression for cmdline scanner introduced in PP/08.
3106 Notification from Dr Andrew Aitchison.
3108 PP/18 Change ClamAV response parsing to be more robust and to handle ClamAV's
3109 ExtendedDetectionInfo response format.
3110 Notification from John Horne.
3112 PP/19 OpenSSL 1.0.0a compatibility const-ness change, should be backwards
3115 PP/20 Added a CONTRIBUTING file. Fixed the documentation build to use http:
3116 XSL and documented dependency on system catalogs, with examples of how
3119 DW/21 Added Valgrind hooks in store.c to help it capture out-of-bounds store
3122 DW/22 Bugzilla 1044: CVE-2010-4345 - partial fix: restrict default behaviour
3123 of CONFIGURE_OWNER and CONFIGURE_GROUP options to no longer allow a
3124 configuration file which is writeable by the Exim user or group.
3126 DW/23 Bugzilla 1044: CVE-2010-4345 - part two: extend checks for writeability
3127 of configuration files to cover files specified with the -C option if
3128 they are going to be used with root privileges, not just the default
3131 DW/24 Bugzilla 1044: CVE-2010-4345 - part three: remove ALT_CONFIG_ROOT_ONLY
3132 option (effectively making it always true).
3134 DW/25 Add TRUSTED_CONFIG_PREFIX_FILE option to allow alternative configuration
3135 files to be used while preserving root privileges.
3137 DW/26 Set FD_CLOEXEC on SMTP sockets after forking in the daemon, to ensure
3138 that rogue child processes cannot use them.
3140 PP/27 Bugzilla 1047: change the default for system_filter_user to be the Exim
3141 run-time user, instead of root.
3143 PP/28 Add WHITELIST_D_MACROS option to let some macros be overridden by the
3144 Exim run-time user without dropping privileges.
3146 DW/29 Remove use of va_copy() which breaks pre-C99 systems. Duplicate the
3147 result string, instead of calling string_vformat() twice with the same
3150 DW/30 Allow TRUSTED_CONFIG_PREFIX_FILE only for Exim or CONFIGURE_OWNER, not
3151 for other users. Others should always drop root privileges if they use
3152 -C on the command line, even for a whitelisted configure file.
3154 DW/31 Turn TRUSTED_CONFIG_PREFIX_FILE into TRUSTED_CONFIG_FILE. No prefixes.
3156 NM/01 Fixed bug #1002 - Message loss when using multiple deliveries
3162 JJ/01 installed exipick 20100104.1, adding $max_received_linelength,
3163 $data_path, and $header_path variables; fixed documentation bugs and
3166 JJ/02 installed exipick 20100222.0, added --input-dir and --finput to allow
3167 exipick to access non-standard spools, including the "frozen" queue
3170 NM/01 Bugzilla 965: Support mysql stored procedures.
3171 Patch from Alain Williams
3173 NM/02 Bugzilla 961: Spacing fix (syntax error) on Makefile directives for NetBSD
3175 NM/03 Bugzilla 955: Documentation fix for max_rcpts.
3176 Patch from Andreas Metzler
3178 NM/04 Bugzilla 954: Fix for unknown responses from Dovecot authenticator.
3179 Patch from Kirill Miazine
3181 NM/05 Bugzilla 671: Added umask to procmail example.
3183 JJ/03 installed exipick 20100323.0, fixing doc bug
3185 NM/06 Bugzilla 988: CVE-2010-2023 - prevent hardlink attack on sticky mail
3186 directory. Notification and patch from Dan Rosenberg.
3188 TK/01 PDKIM: Upgrade PolarSSL files to upstream version 0.12.1.
3190 TK/02 Improve log output when DKIM signing operation fails.
3192 MH/01 Treat the transport option dkim_domain as a colon separated
3193 list, not as a single string, and sign the message with each element,
3194 omitting multiple occurences of the same signer.
3196 NM/07 Null terminate DKIM strings, Null initialise DKIM variable
3197 Bugzilla 985, 986. Patch by Simon Arlott
3199 NM/08 Bugzilla 967. dnsdb DNS TXT record bug fix (DKIM-related)
3200 Patch by Simon Arlott
3202 PP/01 Bugzilla 989: CVE-2010-2024 - work round race condition on
3203 MBX locking. Notification from Dan Rosenberg.
3209 TK/01 Bugzilla 912: Fix DKIM segfault on empty headers/body.
3211 NM/01 Bugzilla 913: Documentation fix for gnutls_* options.
3213 NM/02 Bugzilla 722: Documentation for randint. Better randomness defaults.
3215 NM/03 Bugzilla 847: Enable DNSDB lookup by default.
3217 NM/04 Bugzilla 915: Flag broken perl installation during build.
3223 TK/01 Added patch by Johannes Berg that expands the main option
3224 "spamd_address" if it starts with a dollar sign.
3226 TK/02 Write list of recipients to X-Envelope-Sender header when building
3227 the mbox-format spool file for content scanning (suggested by Jakob
3230 TK/03 Added patch by Wolfgang Breyha that adds experimental DCC
3231 (http://www.dcc-servers.net/) support via dccifd. Activated by
3232 setting EXPERIMENTAL_DCC=yes in Local/Makefile.
3234 TK/04 Bugzilla 673: Add f-protd malware scanner support. Patch submitted
3235 by Mark Daniel Reidel <mr@df.eu>.
3237 NM/01 Bugzilla 657: Embedded PCRE removed from the exim source tree.
3238 When building exim an external PCRE library is now needed -
3239 PCRE is a system library on the majority of modern systems.
3240 See entry on PCRE_LIBS in EDITME file.
3242 NM/02 Bugzilla 646: Removed unwanted C/R in Dovecot authenticator
3243 conversation. Added nologin parameter to request.
3244 Patch contributed by Kirill Miazine.
3246 TF/01 Do not log submission mode rewrites if they do not change the address.
3248 TF/02 Bugzilla 662: Fix stack corruption before exec() in daemon.c.
3250 NM/03 Bugzilla 602: exicyclog now handles panic log, and creates empty
3251 log files in place. Contributed by Roberto Lima.
3253 NM/04 Bugzilla 667: Close socket used by dovecot authenticator.
3255 TF/03 Bugzilla 615: When checking the local_parts router precondition
3256 after a local_part_suffix or local_part_prefix option, Exim now
3257 does not use the address's named list lookup cache, since this
3258 contains cached lookups for the whole local part.
3260 NM/05 Bugzilla 521: Integrated SPF Best Guess support contributed by
3261 Robert Millan. Documentation is in experimental-spec.txt.
3263 TF/04 Bugzilla 668: Fix parallel build (make -j).
3265 NM/05.2 Bugzilla 437: Prevent Maildir aux files being created with mode 000.
3267 NM/05.3 Bugzilla 598: Improvement to Dovecot authenticator handling.
3268 Patch provided by Jan Srzednicki.
3270 TF/05 Leading white space used to be stripped from $spam_report which
3271 wrecked the formatting. Now it is preserved.
3273 TF/06 Save $spam_score, $spam_bar, and $spam_report in spool files, so
3274 that they are available at delivery time.
3276 TF/07 Fix the way ${extract is skipped in the untaken branch of a conditional.
3278 TF/08 TLS error reporting now respects the incoming_interface and
3279 incoming_port log selectors.
3281 TF/09 Produce a more useful error message if an SMTP transport's hosts
3282 setting expands to an empty string.
3284 NM/06 Bugzilla 744: EXPN did not work under TLS.
3285 Patch provided by Phil Pennock.
3287 NM/07 Bugzilla 769: Extraneous comma in usage fprintf
3288 Patch provided by Richard Godbee.
3290 NM/08 Fixed erroneous documentation references to smtp_notquit_acl to be
3291 acl_smtp_notquit, added index entry.
3293 NM/09 Bugzilla 787: Potential buffer overflow in string_format.
3294 Patch provided by Eugene Bujak.
3296 NM/10 Bugzilla 770: Problem on some platforms modifying the len parameter to
3297 accept(). Patch provided by Maxim Dounin.
3299 NM/11 Bugzilla 749: Preserve old behaviour of blanks comparing equal to zero.
3300 Patch provided by Phil Pennock.
3302 NM/12 Bugzilla 497: Correct behaviour of exiwhat when no config exists.
3304 NM/13 Bugzilla 590: Correct handling of Resent-Date headers.
3305 Patch provided by Brad "anomie" Jorsch.
3307 NM/14 Bugzilla 622: Added timeout setting to transport filter.
3308 Patch provided by Dean Brooks.
3310 TK/05 Add native DKIM support (does not depend on external libraries).
3312 NM/15 Bugzilla 854: Removed code that symlinks to pcre as its no longer useful.
3313 Patch provided by Graeme Fowler.
3315 NM/16 Bugzilla 851: Documentation example syntax fix.
3317 NM/17 Changed NOTICE file to remove references to embedded PCRE.
3319 NM/18 Bugzilla 894: Fix issue with very long lines including comments in
3322 NM/19 Bugzilla 745: TLS version reporting.
3323 Patch provided by Phil Pennock.
3325 NM/20 Bugzilla 167: bool: condition support.
3326 Patch provided by Phil Pennock.
3328 NM/21 Bugzilla 665: gnutls_compat_mode to allow compatibility with broken
3329 clients. Patch provided by Phil Pennock.
3331 NM/22 Bugzilla 607: prepend (not append) Resent-Message-ID and Resent-Date.
3332 Patch provided by Brad "anomie" Jorsch.
3334 NM/23 Bugzilla 687: Fix misparses in eximstats.
3335 Patch provided by Heiko Schlittermann.
3337 NM/24 Bugzilla 688: Fix exiwhat to handle log_selector = +pid.
3338 Patch provided by Heiko Schlittermann.
3340 NM/25 Bugzilla 727: Use transport mode as default mode for maildirsize file.
3341 plus update to original patch.
3343 NM/26 Bugzilla 799: Documentation correction for ratelimit.
3345 NM/27 Bugzilla 802: Improvements to local interface IP addr detection.
3346 Patch provided by David Brownlee.
3348 NM/28 Bugzilla 807: Improvements to LMTP delivery logging.
3350 NM/29 Bugzilla 862, 866, 875: Documentation bugfixes.
3352 NM/30 Bugzilla 888: TLS documentation bugfixes.
3354 NM/31 Bugzilla 896: Dovecot buffer overrun fix.
3356 NM/32 Bugzilla 889: Change all instances of "expr" in shell scripts to "expr --"
3357 Unlike the original bugzilla I have changed all shell scripts in src tree.
3359 NM/33 Bugzilla 898: Transport filter timeout fix.
3360 Patch by Todd Rinaldo.
3362 NM/34 Bugzilla 901: Fix sign/unsigned and UTF mismatches.
3363 Patch by Serge Demonchaux.
3365 NM/35 Bugzilla 39: Base64 decode bug fixes.
3366 Patch by Jakob Hirsch.
3368 NM/36 Bugzilla 909: Correct connect() call in dcc code.
3370 NM/37 Bugzilla 910: Correct issue with relaxed/simple handling.
3372 NM/38 Bugzilla 908: Removed NetBSD3 support as no longer needed.
3374 NM/39 Bugzilla 911: Fixed MakeLinks build script.
3380 TK/01 Add preliminary DKIM support. Currently requires a forked version of
3381 ALT-N's libdkim that I have put here:
3382 http://duncanthrax.net/exim-experimental/
3384 Note to Michael Haardt: I had to rename some vars in sieve.c. They
3385 were called 'true' and it seems that C99 defines that as a reserved
3386 keyword to be used with 'bool' variable types. That means you could
3387 not include C99-style headers which use bools without triggering
3388 build errors in sieve.c.
3390 NM/01 Bugzilla 592: --help option is handled incorrectly if exim is invoked
3391 as mailq or other aliases. Changed the --help handling significantly
3392 to do whats expected. exim_usage() emits usage/help information.
3394 SC/01 Added the -bylocaldomain option to eximstats.
3396 NM/02 Bugzilla 619: Defended against bad data coming back from gethostbyaddr.
3398 NM/03 Bugzilla 613: Documentation fix for acl_not_smtp.
3400 NM/04 Bugzilla 628: PCRE update to 7.4 (work done by John Hall).
3406 PH/01 Another patch from the Sieve maintainer.
3408 PH/02 When an IPv6 address is converted to a string for single-key lookup
3409 in an address list (e.g. for an item such as "net24-dbm;/net/works"),
3410 dots are used instead of colons so that keys in lsearch files need not
3411 contain colons. This was done some time before quoting was made available
3412 in lsearch files. However, iplsearch files do require colons in IPv6 keys
3413 (notated using the quote facility) so as to distinguish them from IPv4
3414 keys. This meant that lookups for IP addresses in host lists did not work
3415 for iplsearch lookups.
3417 This has been fixed by arranging for IPv6 addresses to be expressed with
3418 colons if the lookup type is iplsearch. This is not incompatible, because
3419 previously such lookups could never work.
3421 The situation is now rather anomalous, since one *can* have colons in
3422 ordinary lsearch keys. However, making the change in all cases is
3423 incompatible and would probably break a number of configurations.
3425 TK/01 Change PRVS address formatting scheme to reflect latests BATV draft
3428 MH/01 The "spam" ACL condition code contained a sscanf() call with a %s
3429 conversion specification without a maximum field width, thereby enabling
3430 a rogue spamd server to cause a buffer overflow. While nobody in their
3431 right mind would setup Exim to query an untrusted spamd server, an
3432 attacker that gains access to a server running spamd could potentially
3433 exploit this vulnerability to run arbitrary code as the Exim user.
3435 TK/02 Bugzilla 502: Apply patch to make the SPF-Received: header use
3436 $primary_hostname instead of what libspf2 thinks the hosts name is.
3438 MH/02 The dsearch lookup now uses lstat(2) instead of stat(2) to look for
3439 a directory entry by the name of the lookup key. Previously, if a
3440 symlink pointed to a non-existing file or a file in a directory that
3441 Exim lacked permissions to read, a lookup for a key matching that
3442 symlink would fail. Now it is enough that a matching directory entry
3443 exists, symlink or not. (Bugzilla 503.)
3445 PH/03 The body_linecount and body_zerocount variables are now exported in the
3448 PH/04 Added the $dnslist_matched variable.
3450 PH/05 Unset $tls_cipher and $tls_peerdn before making a connection as a client.
3451 This means they are set thereafter only if the connection becomes
3454 PH/06 Added the client_condition to authenticators so that some can be skipped
3455 by clients under certain conditions.
3457 PH/07 The error message for a badly-placed control=no_multiline_responses left
3458 "_responses" off the end of the name.
3460 PH/08 Added -Mvc to output a copy of a message in RFC 2822 format.
3462 PH/09 Tidied the code for creating ratelimiting keys, creating them explicitly
3463 (without spaces) instead of just copying the configuration text.
3465 PH/10 Added the /noupdate option to the ratelimit ACL condition.
3467 PH/11 Added $max_received_linelength.
3469 PH/12 Added +ignore_defer and +include_defer to host lists.
3471 PH/13 Installed PCRE version 7.2. This needed some changes because of the new
3472 way in which PCRE > 7.0 is built.
3474 PH/14 Implemented queue_only_load_latch.
3476 PH/15 Removed an incorrect (int) cast when reading the value of SIZE in a
3477 MAIL command. The effect was to mangle the value on 64-bit systems.
3479 PH/16 Another patch from the Sieve maintainer.
3481 PH/17 Added the NOTQUIT ACL, based on a patch from Ted Cooper.
3483 PH/18 If a system quota error occurred while trying to create the file for
3484 a maildir delivery, the message "Mailbox is full" was not appended to the
3485 bounce if the delivery eventually timed out. Change 4.67/27 below applied
3486 only to a quota excession during the actual writing of the file.
3488 PH/19 It seems that peer DN values may contain newlines (and other non-printing
3489 characters?) which causes problems in log lines. The DN values are now
3490 passed through string_printing() before being added to log lines.
3492 PH/20 Added the "servers=" facility to MySQL and PostgreSQL lookups. (Oracle
3493 and InterBase are left for another time.)
3495 PH/21 Added message_body_newlines option.
3497 PH/22 Guard against possible overflow in moan_check_errorcopy().
3499 PH/23 POSIX allows open() to be a macro; guard against that.
3501 PH/24 If the recipient of an error message contained an @ in the local part
3502 (suitably quoted, of course), incorrect values were put in $domain and
3503 $local_part during the evaluation of errors_copy.
3509 MH/01 Fix for bug #448, segfault in Dovecot authenticator when interface_address
3510 is unset (happens when testing with -bh and -oMi isn't used). Thanks to
3513 PH/01 Added a new log selector smtp_no_mail, to log SMTP sessions that do not
3514 issue a MAIL command.
3516 PH/02 In an ACL statement such as
3518 deny dnslists = X!=127.0.0.2 : X=127.0.0.2
3520 if a client was not listed at all, or was listed with a value other than
3521 127.0.0.2, in the X list, but was listed with 127.0.0.2 in the Y list,
3522 the condition was not true (as it should be), so access was not denied.
3523 The bug was that the ! inversion was incorrectly passed on to the second
3524 item. This has been fixed.
3526 PH/03 Added additional dnslists conditions == and =& which are different from
3527 = and & when the dns lookup returns more than one IP address.
3529 PH/04 Added gnutls_require_{kx,mac,protocols} to give more control over the
3530 cipher suites used by GnuTLS. These options are ignored by OpenSSL.
3532 PH/05 After discussion on the list, added a compile time option ENABLE_DISABLE_
3533 FSYNC, which compiles an option called disable_fsync that allows for
3534 bypassing fsync(). The documentation is heavily laced with warnings.
3536 SC/01 Updated eximstats to collate all SpamAssassin rejects into one bucket.
3538 PH/06 Some tidies to the infrastructure of the Test Suite that is concerned
3539 with the auxiliary C programs that it uses: (1) Arrange for BIND_8_COMPAT
3540 to be defined when compiling on OSX (Darwin); (2) Tidies to the Makefile,
3541 including adding "make clean"; (3) Added -fPIC when compiling the test
3542 dynamically loaded module, to get rid of a warning.
3544 MH/02 Fix for bug #451, causing paniclog entries to be written if a bounce
3545 message fails, move_frozen_messages = true and ignore_bounce_errors_after
3546 = 0s. The bug is otherwise harmless.
3548 PH/07 There was a bug in the dovecot authenticator such that the value of
3549 $auth1 could be overwritten, and so not correctly preserved, after a
3550 successful authentication. This usually meant that the value preserved by
3551 the server_setid option was incorrect.
3553 PH/08 Added $smtp_count_at_connection_start, deliberately with a long name.
3555 PH/09 Installed PCRE release 7.0.
3557 PH/10 The acl_not_smtp_start ACL was, contrary to the documentation, not being
3558 run for batched SMTP input. It is now run at the start of every message
3559 in the batch. While fixing this I discovered that the process information
3560 (output by running exiwhat) was not always getting set for -bs and -bS
3561 input. This is fixed, and it now also says "batched" for BSMTP.
3563 PH/11 Added control=no_pipelining.
3565 PH/12 Added $sending_ip_address and $sending_port (mostly Magnus Holmgren's
3566 patch, slightly modified), and move the expansion of helo_data till after
3567 the connection is made in the smtp transport (so it can use these
3570 PH/13 Added ${rfc2047d: to decoded RFC 2047 strings.
3572 PH/14 Added log_selector = +pid.
3574 PH/15 Flush SMTP output before delaying, unless control=no_delay_flush is set.
3576 PH/16 Add ${if forany and ${if forall.
3578 PH/17 Added dsn_from option to vary the From: line in DSNs.
3580 PH/18 Flush SMTP output before performing a callout, unless control =
3581 no_callout_flush is set.
3583 PH/19 Change 4.64/PH/36 introduced a bug: when address_retry_include_sender
3584 was true (the default) a successful delivery failed to delete the retry
3585 item, thus causing premature timeout of the address. The bug is now
3588 PH/20 Added hosts_avoid_pipelining to the smtp transport.
3590 PH/21 Long custom messages for fakedefer and fakereject are now split up
3591 into multiline responses in the same way that messages for "deny" and
3592 other ACL rejections are.
3594 PH/22 Applied Jori Hamalainen's speed-up changes and typo fixes to exigrep,
3595 with slight modification.
3597 PH/23 Applied sieve patches from the maintainer "tracking the latest notify
3598 draft, changing the syntax and factoring some duplicate code".
3600 PH/24 When the log selector "outgoing_port" was set, the port was shown as -1
3601 for deliveries of the second and subsequent messages over the same SMTP
3604 PH/25 Applied Magnus Holmgren's patch for ${addresses, ${map, ${filter, and
3605 ${reduce, with only minor "tidies".
3607 SC/02 Applied Daniel Tiefnig's patch to improve the '($parent) =' pattern match.
3609 PH/26 Added a "continue" ACL modifier that does nothing, for the benefit of its
3610 expansion side effects.
3612 PH/27 When a message times out after an over-quota error from an Exim-imposed
3613 quota, the bounce message says "mailbox is full". This message was not
3614 being given when it was a system quota that was exceeded. It now should
3617 MH/03 Made $recipients available in local_scan(). local_scan() already has
3618 better access to the recipient list through recipients_list[], but
3619 $recipients can be useful in postmaster-provided expansion strings.
3621 PH/28 The $smtp_command and $smtp_command_argument variables were not correct
3622 in the case of a MAIL command with additional options following the
3623 address, for example: MAIL FROM:<foo@bar> SIZE=1234. The option settings
3624 were accidentally chopped off.
3626 PH/29 SMTP synchronization checks are implemented when a command is read -
3627 there is a check that no more input is waiting when there shouldn't be
3628 any. However, for some commands, a delay in an ACL can mean that it is
3629 some time before the response is written. In this time, more input might
3630 arrive, invalidly. So now there are extra checks after an ACL has run for
3631 HELO/EHLO and after the predata ACL, and likewise for MAIL and RCPT when
3632 pipelining has not been advertised.
3634 PH/30 MH's patch to allow iscntrl() characters to be list separators.
3636 PH/31 Unlike :fail:, a custom message specified with :defer: was not being
3637 returned in the SMTP response when smtp_return_error_details was false.
3638 This has been fixed.
3640 PH/32 Change the Dovecot authenticator to use read() and write() on the socket
3641 instead of the C I/O that was originally supplied, because problems were
3642 reported on Solaris.
3644 PH/33 Compile failed with OpenSSL 0.9.8e. This was due to a coding error in
3645 Exim which did not show up earlier: it was assuming that a call to
3646 SSL_CTX_set_info_callback() might give an error value. In fact, there is
3647 no error. In previous releases of OpenSSL, SSL_CTX_set_info_callback()
3648 was a macro that became an assignment, so it seemed to work. This has
3649 changed to a proper function call with a void return, hence the compile
3650 error. Exim's code has been fixed.
3652 PH/34 Change HDA_SIZE in oracle.c from 256 to 512. This is needed for 64-bit
3655 PH/35 Applied a patch from the Sieve maintainer which fixes a bug in "notify".
3657 PH/36 Applied John Jetmore's patch to add -v functionality to exigrep.
3659 PH/37 If a message is not accepted after it has had an id assigned (e.g.
3660 because it turns out to be too big or there is a timeout) there is no
3661 "Completed" line in the log. When some messages of this type were
3662 selected by exigrep, they were listed as "not completed". Others were
3663 picked up by some special patterns. I have improved the selection
3664 criteria to be more general.
3666 PH/38 The host_find_failed option in the manualroute router can now be set
3667 to "ignore", to completely ignore a host whose IP address cannot be
3668 found. If all hosts are ignored, the behaviour is controlled by the new
3669 host_all_ignored option.
3671 PH/39 In a list of hosts for manualroute, if one item (either because of multi-
3672 homing or because of multiple MX records with /mx) generated more than
3673 one IP address, and the following item turned out to be the local host,
3674 all the secondary addresses of the first item were incorrectly removed
3675 from the list, along with the local host and any following hosts (which
3676 is what is supposed to happen).
3678 PH/40 When Exim receives a message, it writes the login name, uid, and gid of
3679 whoever called Exim into the -H file. In the case of the daemon it was
3680 behaving confusingly. When first started, it used values for whoever
3681 started the daemon, but after a SIGHUP it used the Exim user (because it
3682 calls itself on a restart). I have changed the code so that it now always
3685 PH/41 (Following a suggestion from Tony Finch) If all the RCPT commands in a
3686 message are rejected with the same error (e.g. no authentication or bad
3687 sender address), and a DATA command is nevertheless sent (as can happen
3688 with PIPELINING or a stupid MUA), the error message that was given to the
3689 RCPT commands is included in the rejection of the DATA command. This is
3690 intended to be helpful for MUAs that show only the final error to their
3693 PH/42 Another patch from the Sieve maintainer.
3695 SC/02 Eximstats - Differentiate between permanent and temporary rejects.
3696 Eximstats - Fixed some broken HTML links and added missing column headers
3698 Eximstats - Fixed Grand Total Summary Domains, Edomains, and Email
3699 columns for Rejects, Temp Rejects, Ham, and Spam rows.
3701 SC/03 Eximstats - V1.58 Fix to get <> and blackhole to show in edomain tables.
3703 PH/43 Yet another patch from the Sieve maintainer.
3705 PH/44 I found a way to check for a TCP/IP connection going away before sending
3706 the response to the final '.' that terminates a message, but only in the
3707 case where the client has not sent further data following the '.'
3708 (unfortunately, this is allowed). However, in many cases there won't be
3709 any further data because there won't be any more messages to send. A call
3710 to select() can be used: if it shows that the input is "ready", there is
3711 either input waiting, or the socket has been closed. An attempt to read
3712 the next input character can distinguish the two cases. Previously, Exim
3713 would have sent an OK response which the client would never have see.
3714 This could lead to message repetition. This fix should cure that, at
3715 least in a lot of common cases.
3717 PH/45 Do not advertise STARTTLS in response to HELP unless it would be
3718 advertised in response to EHLO.
3724 PH/01 Two more bugs that were introduced by 4.64/PH/07, in addition to the one
3725 fixed by 4.65/MH/01 (is this a record?) are fixed:
3727 (i) An empty string was always treated as zero by the numeric comparison
3728 operators. This behaviour has been restored.
3730 (ii) It is documented that the numeric comparison operators always treat
3731 their arguments as decimal numbers. This was broken in that numbers
3732 starting with 0 were being interpreted as octal.
3734 While fixing these problems I realized that there was another issue that
3735 hadn't been noticed. Values of message_size_limit (both the global option
3736 and the transport option) were treated as octal if they started with 0.
3737 The documentation was vague. These values are now always treated as
3738 decimal, and I will make that clear in the documentation.
3744 TK/01 Disable default definition of HAVE_LINUX_SENDFILE. Clashes with
3745 Linux large file support (_FILE_OFFSET_BITS=64) on older glibc
3748 MH/01 Don't check that the operands of numeric comparison operators are
3749 integers when their expansion is in "skipping" mode (fixes bug
3750 introduced by 4.64-PH/07).
3752 PH/01 If a system filter or a router generates more than SHRT_MAX (32767)
3753 child addresses, Exim now panics and dies. Previously, because the count
3754 is held in a short int, deliveries were likely to be lost. As such a
3755 large number of recipients for a single message is ridiculous
3756 (performance will be very, very poor), I have chosen to impose a limit
3757 rather than extend the field.
3763 TK/01 Bugzilla #401. Fix DK spooling code so that it can overwrite a
3764 leftover -K file (the existence of which was triggered by #402).
3765 While we were at it, introduced process PID as part of the -K
3766 filename. This should rule out race conditions when creating
3769 TK/02 Bugzilla #402. Apply patch from Simon Arlott, speeding up DK signing
3770 processing considerably. Previous code took too long for large mails,
3771 triggering a timeout which in turn triggers #401.
3773 TK/03 Introduced HAVE_LINUX_SENDFILE to os.h-Linux. Currently only used
3774 in the DK code in transports.c. sendfile() is not really portable,
3775 hence the _LINUX specificness.
3777 TF/01 In the add_headers option to the mail command in an Exim filter,
3778 there was a bug that Exim would claim a syntax error in any
3779 header after the first one which had an odd number of characters
3782 PH/01 If a server that rejects MAIL FROM:<> was the target of a sender
3783 callout verification, Exim cached a "reject" for the entire domain. This
3784 is correct for most verifications, but it is not correct for a recipient
3785 verification with use_sender or use_postmaster set, because in that case
3786 the callout does not use MAIL FROM:<>. Exim now distinguishes the special
3787 case of MAIL FROM:<> rejection from other early rejections (e.g.
3788 rejection of HELO). When verifying a recipient using a non-null MAIL
3789 address, the cache is ignored if it shows MAIL FROM:<> rejection.
3790 Whatever the result of the callout, the value of the domain cache is
3791 left unchanged (for any other kind of callout, getting as far as trying
3792 RCPT means that the domain itself is ok).
3794 PH/02 Tidied a number of unused variable and signed/unsigned warnings that
3797 PH/03 On Solaris, an unexpectedly close socket (dropped connection) can
3798 manifest itself as EPIPE rather than ECONNECT. When tidying away a
3799 session, the daemon ignores ECONNECT errors and logs others; it now
3800 ignores EPIPE as well.
3802 PH/04 Applied Nico Erfurth's refactoring patch to tidy up mime.c
3803 (quoted-printable decoding).
3805 PH/05 Applied Nico Erfurth's refactoring patch to tidy up spool_mbox.c, and
3806 later the small subsequent patch to fix an introduced bug.
3808 PH/06 Installed the latest Cygwin Makefile from the Cygwin maintainer.
3810 PH/07 There was no check for overflow in expansions such as ${if >{1}{4096M}}.
3812 PH/08 An error is now given if message_size_limit is specified negative.
3814 PH/09 Applied and tidied up Jakob Hirsch's patch for allowing ACL variables
3815 to be given (somewhat) arbitrary names.
3817 JJ/01 exipick 20060919.0, allow for arbitrary acl_ variables introduced
3820 JJ/02 exipick 20060919.0, --show-vars args can now be regular expressions,
3821 miscellaneous code fixes
3823 PH/10 Added the log_reject_target ACL modifier to specify where to log
3826 PH/11 Callouts were setting the name used for EHLO/HELO from $smtp_active_
3827 hostname. This is wrong, because it relates to the incoming message (and
3828 probably the interface on which it is arriving) and not to the outgoing
3829 callout (which could be using a different interface). This has been
3830 changed to use the value of the helo_data option from the smtp transport
3831 instead - this is what is used when a message is actually being sent. If
3832 there is no remote transport (possible with a router that sets up host
3833 addresses), $smtp_active_hostname is used.
3835 PH/12 Installed Andrey Panin's patch to add a dovecot authenticator. Various
3836 tweaks were necessary in order to get it to work (see also 21 below):
3837 (a) The code assumed that strncpy() returns a negative number on buffer
3838 overflow, which isn't the case. Replaced with Exim's string_format()
3840 (b) There were several signed/unsigned issues. I just did the minimum
3841 hacking in of casts. There is scope for a larger refactoring.
3842 (c) The code used strcasecmp() which is not a standard C function.
3843 Replaced with Exim's strcmpic() function.
3844 (d) The code set only $1; it now sets $auth1 as well.
3845 (e) A simple test gave the error "authentication client didn't specify
3846 service in request". It would seem that Dovecot has changed its
3847 interface. Fortunately there's a specification; I followed it and
3848 changed what the client sends and it appears to be working now.
3850 PH/13 Added $message_headers_raw to provide the headers without RFC 2047
3853 PH/14 Corrected misleading output from -bv when -v was also used. Suppose the
3854 address A is aliased to B and C, where B exists and C does not. Without
3855 -v the output is "A verified" because verification stops after a
3856 successful redirection if more than one address is generated. However,
3857 with -v the child addresses are also verified. Exim was outputting "A
3858 failed to verify" and then showing the successful verification for C,
3859 with its parentage. It now outputs "B failed to verify", showing B's
3860 parentage before showing the successful verification of C.
3862 PH/15 Applied Michael Deutschmann's patch to allow DNS black list processing to
3863 look up a TXT record in a specific list after matching in a combined
3866 PH/16 It seems that the options setting for the resolver (RES_DEFNAMES and
3867 RES_DNSRCH) can affect the behaviour of gethostbyname() and friends when
3868 they consult the DNS. I had assumed they would set it the way they
3869 wanted; and indeed my experiments on Linux seem to show that in some
3870 cases they do (I could influence IPv6 lookups but not IPv4 lookups).
3871 To be on the safe side, however, I have now made the interface to
3872 host_find_byname() similar to host_find_bydns(), with an argument
3873 containing the DNS resolver options. The host_find_byname() function now
3874 sets these options at its start, just as host_find_bydns() does. The smtp
3875 transport options dns_qualify_single and dns_search_parents are passed to
3876 host_find_byname() when gethostbyname=TRUE in this transport. Other uses
3877 of host_find_byname() use the default settings of RES_DEFNAMES
3878 (qualify_single) but not RES_DNSRCH (search_parents).
3880 PH/17 Applied (a modified version of) Nico Erfurth's patch to make
3881 spool_read_header() do less string testing, by means of a preliminary
3882 switch on the second character of optional "-foo" lines. (This is
3883 overdue, caused by the large number of possibilities that now exist.
3884 Originally there were few.) While I was there, I also converted the
3885 str(n)cmp tests so they don't re-test the leading "-" and the first
3886 character, in the hope this might squeeze out yet more improvement.
3888 PH/18 Two problems with "group" syntax in header lines when verifying: (1) The
3889 flag allowing group syntax was set by the header_syntax check but not
3890 turned off, possible causing trouble later; (2) The flag was not being
3891 set at all for the header_verify test, causing "group"-style headers to
3892 be rejected. I have now set it in this case, and also caused header_
3893 verify to ignore an empty address taken from a group. While doing this, I
3894 came across some other cases where the code for allowing group syntax
3895 while scanning a header line wasn't quite right (mostly, not resetting
3896 the flag correctly in the right place). These bugs could have caused
3897 trouble for malformed header lines. I hope it is now all correct.
3899 PH/19 The functions {pwcheck,saslauthd}_verify_password() are always called
3900 with the "reply" argument non-NULL. The code, however (which originally
3901 came from elsewhere) had *some* tests for NULL when it wrote to *reply,
3902 but it didn't always do it. This confused somebody who was copying the
3903 code for some other use. I have removed all the tests.
3905 PH/20 It was discovered that the GnuTLS code had support for RSA_EXPORT, a
3906 feature that was used to support insecure browsers during the U.S. crypto
3907 embargo. It requires special client support, and Exim is probably the
3908 only MTA that supported it -- and would never use it because real RSA is
3909 always available. This code has been removed, because it had the bad
3910 effect of slowing Exim down by computing (never used) parameters for the
3911 RSA_EXPORT functionality.
3913 PH/21 On the advice of Timo Sirainen, added a check to the dovecot
3914 authenticator to fail if there's a tab character in the incoming data
3915 (there should never be unless someone is messing about, as it's supposed
3916 to be base64-encoded). Also added, on Timo's advice, the "secured" option
3917 if the connection is using TLS or if the remote IP is the same as the
3918 local IP, and the "valid-client-cert option" if a client certificate has
3921 PH/22 As suggested by Dennis Davis, added a server_condition option to *all*
3922 authenticators. This can be used for authorization after authentication
3923 succeeds. (In the case of plaintext, it servers for both authentication
3926 PH/23 Testing for tls_required and lost_connection in a retry rule didn't work
3927 if any retry times were supplied.
3929 PH/24 Exim crashed if verify=helo was activated during an incoming -bs
3930 connection, where there is no client IP address to check. In this
3931 situation, the verify now always succeeds.
3933 PH/25 Applied John Jetmore's -Mset patch.
3935 PH/26 Added -bem to be like -Mset, but loading a message from a file.
3937 PH/27 In a string expansion for a processed (not raw) header when multiple
3938 headers of the same name were present, leading whitespace was being
3939 removed from all of them, but trailing whitespace was being removed only
3940 from the last one. Now trailing whitespace is removed from each header
3941 before concatenation. Completely empty headers in a concatenation (as
3942 before) are ignored.
3944 PH/28 Fixed bug in backwards-compatibility feature of PH/09 (thanks to John
3945 Jetmore). It would have mis-read ACL variables from pre-4.61 spool files.
3947 PH/29 [Removed. This was a change that I later backed out, and forgot to
3948 correct the ChangeLog entry (that I had efficiently created) before
3949 committing the later change.]
3951 PH/30 Exim was sometimes attempting to deliver messages that had suffered
3952 address errors (4xx response to RCPT) over the same connection as other
3953 messages routed to the same hosts. Such deliveries are always "forced",
3954 so retry times are not inspected. This resulted in far too many retries
3955 for the affected addresses. The effect occurred only when there were more
3956 hosts than the hosts_max_try setting in the smtp transport when it had
3957 the 4xx errors. Those hosts that it had tried were not added to the list
3958 of hosts for which the message was waiting, so if all were tried, there
3959 was no problem. Two fixes have been applied:
3961 (i) If there are any address or message errors in an SMTP delivery, none
3962 of the hosts (tried or untried) are now added to the list of hosts
3963 for which the message is waiting, so the message should not be a
3964 candidate for sending over the same connection that was used for a
3965 successful delivery of some other message. This seems entirely
3966 reasonable: after all the message is NOT "waiting for some host".
3967 This is so "obvious" that I'm not sure why it wasn't done
3968 previously. Hope I haven't missed anything, but it can't do any
3969 harm, as the worst effect is to miss an optimization.
3971 (ii) If, despite (i), such a delivery is accidentally attempted, the
3972 routing retry time is respected, so at least it doesn't keep
3973 hammering the server.
3975 PH/31 Installed Andrew Findlay's patch to close the writing end of the socket
3976 in ${readsocket because some servers need this prod.
3978 PH/32 Added some extra debug output when updating a wait-xxx database.
3980 PH/33 The hint "could be header name not terminated by colon", which has been
3981 given for certain expansion errors for a long time, was not being given
3982 for the ${if def:h_colon_omitted{... case.
3984 PH/34 The spec says: "With one important exception, whenever a domain list is
3985 being scanned, $domain contains the subject domain." There was at least
3986 one case where this was not true.
3988 PH/35 The error "getsockname() failed: connection reset by peer" was being
3989 written to the panic log as well as the main log, but it isn't really
3990 panic-worthy as it just means the connection died rather early on. I have
3991 removed the panic log writing for the ECONNRESET error when getsockname()
3994 PH/36 After a 4xx response to a RCPT error, that address was delayed (in queue
3995 runs only) independently of the message's sender address. This meant
3996 that, if the 4xx error was in fact related to the sender, a different
3997 message to the same recipient with a different sender could confuse
3998 things. In particular, this can happen when sending to a greylisting
3999 server, but other circumstances could also provoke similar problems.
4000 I have changed the default so that the retry time for these errors is now
4001 based a combination of the sender and recipient addresses. This change
4002 can be overridden by setting address_retry_include_sender=false in the
4005 PH/37 For LMTP over TCP/IP (the smtp transport), error responses from the
4006 remote server are returned as part of bounce messages. This was not
4007 happening for LMTP over a pipe (the lmtp transport), but now it is the
4008 same for both kinds of LMTP.
4010 PH/38 Despite being documented as not happening, Exim was rewriting addresses
4011 in header lines that were in fact CNAMEs. This is no longer the case.
4013 PH/39 If -R or -S was given with -q<time>, the effect of -R or -S was ignored,
4014 and queue runs started by the daemon processed all messages. This has
4015 been fixed so that -R and -S can now usefully be given with -q<time>.
4017 PH/40 Import PCRE release 6.7 (fixes some bugs).
4019 PH/41 Add bitwise logical operations to eval (courtesy Brad Jorsch).
4021 PH/42 Give an error if -q is specified more than once.
4023 PH/43 Renamed the variables $interface_address and $interface_port as
4024 $received_ip_address and $received_port, to make it clear that these
4025 values apply to message reception, and not to the outgoing interface when
4026 a message is delivered. (The old names remain recognized, of course.)
4028 PH/44 There was no timeout on the connect() call when using a Unix domain
4029 socket in the ${readsocket expansion. There now is.
4031 PH/45 Applied a modified version of Brad Jorsch's patch to allow "message" to
4032 be meaningful with "accept".
4034 SC/01 Eximstats V1.43
4035 Bug fix for V1.42 with -h0 specified. Spotted by Chris Lear.
4037 SC/02 Eximstats V1.44
4038 Use a glob alias rather than an array ref in the generated
4039 parser. This improves both readability and performance.
4041 SC/03 Eximstats V1.45 (Marco Gaiarin / Steve Campbell)
4042 Collect SpamAssassin and rejection statistics.
4043 Don't display local sender or destination tables unless
4044 there is data to show.
4045 Added average volumes into the top table text output.
4047 SC/04 Eximstats V1.46
4048 Collect data on the number of addresses (recipients)
4049 as well as the number of messages.
4051 SC/05 Eximstats V1.47
4052 Added 'Message too big' to the list of mail rejection
4053 reasons (thanks to Marco Gaiarin).
4055 SC/06 Eximstats V1.48
4056 Mainlog lines which have GMT offsets and are too short to
4057 have a flag are now skipped.
4059 SC/07 Eximstats V1.49 (Alain Williams)
4060 Added the -emptyok flag.
4062 SC/08 Eximstats V1.50
4063 Fixes for obtaining the IP address from reject messages.
4065 JJ/03 exipick.20061117.2, made header handling as similar to exim as possible
4066 (added [br]h_ prefixes, implemented RFC2047 decoding. Fixed
4067 whitespace changes from 4.64-PH/27
4069 JJ/04 exipick.20061117.2, fixed format and added $message_headers_raw to
4072 JJ/05 exipick.20061117.2, bug fixes (error out sooner when invalid criteria
4073 are found, allow negative numbers in numeric criteria)
4075 JJ/06 exipick.20061117.2, added new $message_body_missing variable
4077 JJ/07 exipick.20061117.2, added $received_ip_address and $received_port
4078 to match changes made in 4.64-PH/43
4080 PH/46 Applied Jori Hamalainen's patch to add features to exiqsumm.
4082 PH/47 Put in an explicit test for a DNS lookup of an address record where the
4083 "domain" is actually an IP address, and force a failure. This locks out
4084 those revolvers/nameservers that support "A-for-A" lookups, in
4085 contravention of the specifications.
4087 PH/48 When a host name was looked up from an IP address, and the subsequent
4088 forward lookup of the name timed out, the host name was left in
4089 $sender_host_name, contrary to the specification.
4091 PH/49 Although default lookup types such as lsearch* or cdb*@ have always been
4092 restricted to single-key lookups, Exim was not diagnosing an error if
4093 * or *@ was used with a query-style lookup.
4095 PH/50 Increased the value of DH_BITS in tls-gnu.c from 768 to 1024.
4097 MH/01 local_scan ABI version incremented to 1.1. It should have been updated
4098 long ago, but noone interested enough thought of it. Let's just say that
4099 the "1.1" means that there are some new functions that weren't there at
4100 some point in the past.
4102 PH/51 Error processing for expansion failure of helo_data from an smtp
4103 transport during callout processing was broken.
4105 PH/52 Applied John Jetmore's patch to allow tls-on-connect and STARTTLS to be
4106 tested/used via the -bh/-bhc/-bs options.
4108 PH/53 Added missing "#include <time.h>" to pcre/pcretest.c (this was a PCRE
4109 bug, fixed in subsequent PCRE releases).
4111 PH/54 Applied Robert Bannocks' patch to avoid a problem with references that
4112 arises when using the Solaris LDAP libraries (but not with OpenLDAP).
4114 PH/55 Check for a ridiculously long file name in exim_dbmbuild.
4120 SC/01 Use a glob alias rather than an array ref in eximstats generated
4121 parser. This improves both readability and performance.
4123 SC/02 Collect SpamAssassin and rejection statistics in eximstats.
4124 Don't display local sender or destination tables in eximstats unless
4125 there is data to show.
4126 Added average volumes into the eximstats top table text output.
4128 SC/03 Collect data on the number of addresses (recipients) as well
4129 as the number of messages in eximstats.
4131 TF/01 Correct an error in the documentation for the redirect router. Exim
4132 does (usually) call initgroups() when daemonizing.
4134 TF/02 Call initgroups() when dropping privilege in exim.c, so that Exim runs
4135 with consistent privilege compared to when running as a daemon.
4137 TF/03 Note in the spec that $authenticated_id is not set for local
4138 submissions from trusted users.
4140 TF/04 The ratelimit per_rcpt option now works correctly in acl_not_smtp.
4141 Thanks to Dean Brooks <dean@iglou.com> for the patch.
4143 TF/05 Make it easier to get SMTP authentication and TLS/SSL support working
4144 by adding some example configuration directives to the default
4145 configuration file. A little bit of work is required to uncomment the
4146 directives and define how usernames and passwords are checked, but
4147 there is now a framework to start from.
4149 PH/01 Added #define LDAP_DEPRECATED 1 to ldap.c because some of the "old"
4150 functions that Exim currently uses aren't defined in ldap.h for OpenLDAP
4151 without this. I don't know how relevant this is to other LDAP libraries.
4153 PH/02 Add the verb name to the "unknown ACL verb" error.
4155 PH/03 Magnus Holmgren's patch for filter_prepend_home.
4157 PH/03 Fixed Bugzilla #101: macro definition between ACLs doesn't work.
4159 PH/04 Applied Magnus Holmgren's patch to fix Bugzilla #98: transport's home
4160 directory not expanded when it should be if an expanded home directory
4161 was set for the address (which is overridden by the transport).
4163 PH/05 Applied Alex Kiernan's patch to fix Bugzilla #99: a problem with
4166 PH/06 Added acl_not_smtp_start, based on Johannes Berg's patch, and set the
4167 bit to forbid control=suppress_local_fixups in the acl_not_smtp ACL,
4168 because it is too late at that time, and has no effect.
4170 PH/07 Changed ${quote_pgsql to quote ' as '' instead of \' because of a
4171 security issue with \' (bugzilla #107). I could not use the
4172 PQescapeStringConn() function, because it needs a PGconn value as one of
4175 PH/08 When testing addresses using -bt, indicate those final addresses that
4176 are duplicates that would not cause an additional delivery. At least one
4177 person was confused, thinking that -bt output corresponded to deliveries.
4178 (Suppressing duplicates isn't a good idea as you lose the information
4179 about possibly different redirections that led to the duplicates.)
4181 PH/09 Applied patch from Erik to use select() instead of poll() in spam.c on
4182 systems where poll() doesn't work, in particular OS X.
4184 PH/10 Added more information to debugging output for retry time not reached.
4186 PH/11 Applied patch from Arkadiusz Miskiewicz to apply a timeout to read
4187 operations in malware.c.
4189 PH/12 Applied patch from Magnus Holmgren to include the "h" tag in Domain Keys
4192 PH/13 If write_rejectlog was set false when logging was sent to syslog with
4193 syslog_duplication set false, log lines that would normally be written
4194 both the the main log and to the reject log were not written to syslog at
4197 PH/14 In the default configuration, change the use of "message" in ACL warn
4198 statements to "add_header".
4200 PH/15 Diagnose a filter syntax error for "seen", "unseen", or "noerror" if not
4201 not followed by a command (e.g. "seen endif").
4203 PH/16 Recognize SMTP codes at the start of "message" in ACLs and after :fail:
4204 and :defer: in a redirect router. Add forbid_smtp_code to suppress the
4207 PH/17 Added extra conditions to the default value of delay_warning_condition
4211 { !eq{$h_list-id:$h_list-post:$h_list-subscribe:}{} } \
4212 { match{$h_precedence:}{(?i)bulk|list|junk} } \
4213 { match{$h_auto-submitted:}{(?i)auto-generated|auto-replied} } \
4216 The Auto-Submitted: and various List- headers are standardised, whereas I
4217 don't think Precedence: ever was.
4219 PH/18 Refactored debugging code in route_finduser() to show more information,
4220 in particular, the error code if getpwnam() issues one.
4222 PH/19 Added PQsetClientEncoding(conn, "SQL_ASCII") to the pgsql code module.
4223 This is apparently needed in addition to the PH/07 change above to avoid
4224 any possible encoding problems.
4226 PH/20 Perl can change the locale. Exim was resetting it after a ${perl call,
4227 but not after initializing Perl.
4229 PH/21 Added a call to PQsetNoticeProcessor() to catch pgsql "notices" and
4230 output them only if debugging. By default they are written stderr,
4231 apparently, which is not desirable.
4233 PH/22 Added Alain Williams' LDAP patch to support setting REFERRALS=off on
4236 JJ/01 exipick: added --reverse (and -R synonym), --random, --size, --sort and
4239 JJ/02 exipick: rewrote --help documentation to hopefully make more clear.
4241 PH/23 Made -oMaa and -oMt work with -bh and -bs to pretend the connection is
4242 authenticated or an ident call has been made. Suppress the default
4243 values for $authenticated_id and $authenticated_sender (but permit -oMai
4244 and -oMas) when testing with -bh.
4246 PH/24 Re-jigged the order of the tests in the default configuration so that the
4247 tests for valid domains and recipients precede the DNS black list and CSA
4248 tests, on the grounds that those ones are more expensive.
4250 PH/25 Exim was not testing for a space following SMTP commands such as EHLO
4251 that require one. Thus, EHLORHUBARB was interpreted as a valid command.
4252 This bug exists in every version of Exim that I still have, right back to
4255 PH/26 (n)wildlsearch lookups are documented as being done case-insensitively.
4256 However, an attempt to turn on case-sensitivity in a regex key by
4257 including (?-i) didn't work because the subject string was already
4258 lowercased, and the effects were non-intuitive. It turns out that a
4259 one-line patch can be used to allow (?-i) to work as expected.
4265 TF/01 Fix the add_header change below (4.61 PH/55) which had a bug that (amongst
4266 other effects) broke the use of negated acl sub-conditions.
4268 PH/01 ${readsocket now supports Internet domain sockets (modified John Jetmore
4271 PH/02 When tcp-wrappers is called from Exim, it returns only "deny" or "allow".
4272 "Deny" causes Exim to reject the incoming connection with a 554 error.
4273 Unfortunately, if there is a major crisis, such as a disk failure,
4274 tcp-wrappers gives "deny", whereas what one would like would be some
4275 kind of temporary error. A kludge has been added to help with this.
4276 Before calling hosts_ctl(), errno is set zero. If the result is "deny", a
4277 554 error is used if errno is still zero or contains ENOENT (which occurs
4278 if either of the /etc/hosts.{allow,deny} files is missing). Otherwise, a
4281 PH/03 Add -lutil to the default FreeBSD LIBS setting.
4283 PH/04 Change PH/19 for 4.61 was too wide. It should not be applied to host
4284 errors. Otherwise a message that provokes a temporary error (when other
4285 messages do not) can cause a whole host to time out.
4287 PH/05 Batch deliveries by appendfile and pipe transports did not work when the
4288 addresses were routed directly to files or pipes from a redirect router.
4289 File deliveries just didn't batch; pipe deliveries might have suffered
4292 PH/06 A failure to get a lock for a hints database would erroneously always say
4293 "Failed to get write lock", even when it was really a read lock.
4295 PH/07 The appendfile transport was creating MBX lock files with a fixed mode
4296 of 0600. This has been changed to use the value of the lockfile_mode
4297 option (which defaults to 0600).
4299 PH/08 Applied small patch from the Sieve maintainer.
4301 PH/09 If maildir_quota_directory_regex was set to exclude (say) the .Trash
4302 folder from quota calculations, a direct delivery into this folder messed
4303 up the contents of the maildirsize file. This was because the regex was
4304 used only to exclude .Trash (or whatever) when the size of the mailbox
4305 was calculated. There was no check that a delivery was happening into an
4306 excluded directory. This bug has been fixed by ignoring all quota
4307 processing for deliveries into excluded directories.
4309 PH/10 Added the maildirfolder_create_regex option to appendfile.
4315 PH/01 The code for finding all the local interface addresses on a FreeBSD
4316 system running IPv6 was broken. This may well have applied to all BSD
4317 systems, as well as to others that have similar system calls. The broken
4318 code found IPv4 interfaces correctly, but gave incorrect values for the
4319 IPv6 interfaces. In particular, ::1 was not found. The effect in Exim was
4320 that it would not match correctly against @[] and not recognize the IPv6
4323 PH/02 The ipliteral router was not recognizing addresses of the form user@
4324 [ipv6:....] because it didn't know about the "ipv6:" prefix.
4326 PH/03 Added disable_ipv6.
4328 PH/04 Changed $reply_address to use the raw form of the headers instead of the
4329 decoded form, because it is most often used to construct To: headers
4330 lines in autoreplies, and the decoded form may well be syntactically
4331 invalid. However, $reply_address has leading white space removed, and all
4332 newlines turned into spaces so that the autoreply transport does not
4335 PH/05 If group was specified without a user on a router, and no group or user
4336 was specified on a transport, the group from the router was ignored.
4338 PH/06 Increased the number of ACL variables to 20 of each type, and arranged
4339 for visible compile-time settings that can be used to change these
4340 numbers, for those that want even more. Backwards compatibility with old
4341 spool files has been maintained. However, going back to a previous Exim
4342 release will lost any variables that are in spool files.
4344 PH/07 Two small changes when running in the test harness: increase delay when
4345 passing a TCP/IP connection to a new process, in case the original
4346 process has to generate a bounce, and remove special handling of
4347 127.0.0.2 (sic), which is no longer necessary.
4349 PH/08 Changed debug output of dbfn_open() flags from numbers to names, so as to
4350 be the same on different OS.
4352 PH/09 Moved a debug statement in filter processing to avoid a race problem when
4355 JJ/01 exipick: fixed bug where -b (brief) output option showed "Vars:"
4356 whether --show-vars was specified or not
4358 JJ/02 exipick: Added support for new ACL variable spool format introduced
4361 PH/10 Fixed another bug related to PH/04 above: if an incoming message had a
4362 syntactically invalid From: or Reply-to: line, and a filter used this to
4363 generate an autoreply, and therefore failed to obtain an address for the
4364 autoreply, Exim could try to deliver to a non-existent relative file
4365 name, causing unrelated and misleading errors. What now happens is that
4366 it logs this as a hard delivery error, but does not attempt to create a
4369 PH/11 The exinext utility has a -C option for testing purposes, but although
4370 the given file was scanned by exinext itself; it wasn't being passed on
4371 when Exim was called.
4373 PH/12 In the smtp transport, treat an explicit ECONNRESET error the same as
4374 an end-of-file indication when reading a command response.
4376 PH/13 Domain literals for IPv6 were not recognized unless IPv6 support was
4377 compiled. In many other places in Exim, IPv6 addresses are always
4378 recognized, so I have changed this. It also means that IPv4 domain
4379 literals of the form [IPV4:n.n.n.n] are now always recognized.
4381 PH/14 When a uid/gid is specified for the queryprogram router, it cannot be
4382 used if the router is not running as root, for example, when verifying at
4383 ACL time, or when using -bh. The debugging output from this situation was
4384 non-existent - all you got was a failure to exec. I have made two
4387 (a) Failures to set uid/gid, the current directory, or a process leader
4388 in a subprocess such as that created by queryprogram now generate
4389 suitable debugging output when -d is set.
4391 (b) The queryprogram router detects when it is not running as root,
4392 outputs suitable debugging information if -d is set, and then runs
4393 the subprocess without attempting to change uid/gid.
4395 PH/15 Minor change to Makefile for building test_host (undocumented testing
4398 PH/16 As discussed on the list in Nov/Dec: Exim no longer looks at the
4399 additional section of a DNS packet that returns MX or SRV records.
4400 Instead, it always explicitly searches for A/AAAA records. This avoids
4401 major problems that occur when a DNS server includes only records of one
4402 type (A or AAAA) in an MX/SRV packet. A byproduct of this change has
4403 fixed another bug: if SRV records were looked up and the corresponding
4404 address records were *not* found in the additional section, the port
4405 values from the SRV records were lost.
4407 PH/17 If a delivery to a pipe, file, or autoreply was deferred, Exim was not
4408 using the correct key (the original address) when searching the retry
4409 rules in order to find which one to use for generating the retry hint.
4411 PH/18 If quota_warn_message contains a From: header, Exim now refrains from
4412 adding the default one. Similarly, if it contains a Reply-To: header, the
4413 errors_reply_to option, if set, is not used.
4415 PH/19 When calculating a retry time, Exim used to measure the "time since
4416 failure" by looking at the "first failed" field in the retry record. Now
4417 it does not use this if it is later than than the arrival time of the
4418 message. Instead it uses the arrival time. This makes for better
4419 behaviour in cases where some deliveries succeed, thus re-setting the
4420 "first failed" field. An example is a quota failure for a huge message
4421 when small messages continue to be delivered. Without this change, the
4422 "time since failure" will always be short, possible causing more frequent
4423 delivery attempts for the huge message than are intended.
4424 [Note: This change was subsequently modified - see PH/04 for 4.62.]
4426 PH/20 Added $auth1, $auth2, $auth3 to contain authentication data (as well as
4427 $1, $2, $3) because the numerical variables can be reset during some
4428 expansion items (e.g. "match"), thereby losing the authentication data.
4430 PH/21 Make -bV show the size of off_t variables so that the test suite can
4431 decide whether to run tests for quotas > 2G.
4433 PH/22 Test the values given for quota, quota_filecount, quota_warn_threshold,
4434 mailbox_size, and mailbox_filecount in the appendfile transport. If a
4435 filecount value is greater than 2G or if a quota value is greater than 2G
4436 on a system where the size of off_t is not greater than 4, a panic error
4439 PH/23 When a malformed item such as 1.2.3/24 appears in a host list, it can
4440 never match. The debug and -bh output now contains an explicit error
4441 message indicating a malformed IPv4 address or mask.
4443 PH/24 An host item such as 1.2.3.4/abc was being treated as the IP address
4444 1.2.3.4 without a mask. Now it is not recognized as an IP address, and
4445 PH/23 above applies.
4447 PH/25 Do not write to syslog when running in the test harness. The only
4448 occasion when this arises is a failure to open the main or panic logs
4449 (for which there is an explicit test).
4451 PH/26 Added the /no_tell option to "control=freeze".
4453 PH/27 If a host name lookup failed very early in a connection, for example, if
4454 the IP address matched host_lookup and the reverse lookup yielded a name
4455 that did not have a forward lookup, an error message of the form "no IP
4456 address found for host xxx.xxx.xxx (during SMTP connection from NULL)"
4457 could be logged. Now it outputs the IP address instead of "NULL".
4459 PH/28 An enabling patch from MH: add new function child_open_exim2() which
4460 allows the sender and the authenticated sender to be set when
4461 submitting a message from within Exim. Since child_open_exim() is
4462 documented for local_scan(), the new function should be too.
4464 PH/29 In GnuTLS, a forced expansion failure for tls_privatekey was not being
4465 ignored. In both GnuTLS and OpenSSL, an expansion of tls_privatekey that
4466 results in an empty string is now treated as unset.
4468 PH/30 Fix eximon buffer overflow bug (Bugzilla #73).
4470 PH/31 Added sender_verify_fail logging option.
4472 PH/32 In November 2003, the code in Exim that added an empty Bcc: header when
4473 needed by RFC 822 but not by RFC 2822 was commented out. I have now
4474 tidied the source and removed it altogether.
4476 PH/33 When a queue run was abandoned because the load average was too high, a
4477 log line was always written; now it is written only if the queue_run log
4478 selector is set. In addition, the log line for abandonment now contains
4479 information about the queue run such as the pid. This is always present
4480 in "start" and "stop" lines but was omitted from the "abandon" line.
4482 PH/34 Omit spaces between a header name and the colon in the error message that
4483 is given when verify = headers_syntax fails (if there are lots of them,
4484 the message gets confusing).
4486 PH/35 Change the default for dns_check_names_pattern to allow slashes within
4487 names, as there are now some PTR records that contain slashes. This check
4488 is only to protect against broken name servers that fall over on strange
4489 characters, so the fact that it applies to all lookups doesn't matter.
4491 PH/36 Now that the new test suite is complete, we can remove some of the
4492 special code in Exim that was needed for the old test suite. For example,
4493 sorting DNS records because real resolvers return them in an arbitrary
4494 order. The new test suite's fake resolver always returns records in the
4497 PH/37 When running in the test harness, use -odi for submitted messages (e.g.
4498 bounces) except when queue_only is set, to avoid logging races between
4499 the different processes.
4501 PH/38 Panic-die if .include specifies a non-absolute path.
4503 PH/39 A tweak to the "H" retry rule from its user.
4505 JJ/03 exipick: Removed parentheses from 'next' and 'last' calls that specified
4506 a label. They prevented compilation on older perls.
4508 JJ/04 exipick: Refactored code to prevent implicit split to @_ which caused
4509 a warning to be raised on newish perls.
4511 JJ/05 exipick: Fixed bug where -bpc always showed a count of all messages
4512 on queue. Changes to match documented behaviour of showing count of
4513 messages matching specified criteria.
4515 PH/40 Changed the default ident timeout from 30s to 5s.
4517 PH/41 Added support for the use of login_cap features, on those BSD systems
4518 that have them, for controlling the resources used by pipe deliveries.
4520 PH/42 The content-scanning code uses fopen() to create files in which to put
4521 message data. Previously it was not paying any attention to the mode of
4522 the files. Exim runs with umask(0) because the rest of the code creates
4523 files with open(), and sets the required mode explicitly. Thus, these
4524 files were ending up world-writeable. This was not a big issue, because,
4525 being within the spool directory, they were not world-accessible. I have
4526 created a function called modefopen, which takes an additional mode
4527 argument. It sets umask(777), creates the file, chmods it to the required
4528 mode, then resets the umask. All the relevant calls to fopen() in the
4529 content scanning code have been changed to use this function.
4531 PH/43 If retry_interval_max is set greater than 24 hours, it is quietly reset
4532 to 24 hours. This avoids potential overflow problems when processing G
4533 and H retry rules. I suspect nobody ever tinkers with this value.
4535 PH/44 Added STRIP_COMMAND=/usr/bin/strip to the FreeBSD Makefile.
4537 PH/45 When the plaintext authenticator is running as a client, the server's
4538 challenges are checked to ensure they are valid base64 strings. By
4539 default, the authentication attempt is cancelled if an invalid string is
4540 received. Setting client_ignore_invalid_base64 true ignores these errors.
4541 The decoded challenge strings are now placed in $auth1, $auth2, etc. as
4542 they are received. Thus, the responses can be made to depend on the
4543 challenges. If an invalid string is ignored, an empty string is placed in
4546 PH/46 Messages that are created by the autoreply transport now contains a
4547 References: header, in accordance with RFCs 2822 and 3834.
4549 PH/47 Added authenticated_sender_force to the smtp transport.
4551 PH/48 The ${prvs expansion was broken on systems where time_t was long long.
4553 PH/49 Installed latest patch from the Sieve maintainer.
4555 PH/50 When an Exim quota was set without a file count quota, and mailbox_size
4556 was also set, the appendfile transport was unnecessarily scanning a
4557 directory of message files (e.g. for maildir delivery) to find the count
4558 of files (along with the size), even though it did not need this
4559 information. It now does the scan only if it needs to find either the
4560 size of the count of files.
4562 PH/51 Added ${time_eval: to convert Exim time strings into seconds.
4564 PH/52 Two bugs concerned with error handling when the smtp transport is
4567 (i) Exim was not creating retry information for temporary errors given
4568 for individual recipients after the DATA command when the smtp transport
4569 was used in LMTP mode. This meant that they could be retried too
4570 frequently, and not timed out correctly.
4572 (ii) Exim was setting the flag that allows error details to be returned
4573 for LMTP errors on RCPT commands, but not for LMTP errors for individual
4574 recipients that were returned after the DATA command.
4576 PH/53 This is related to PH/52, but is more general: for any failing address,
4577 when detailed error information was permitted to be returned to the
4578 sender, but the error was temporary, then after the final timeout, only
4579 "retry timeout exceeded" was returned. Now it returns the full error as
4580 well as "retry timeout exceeded".
4582 PH/54 Added control=allow_auth_unadvertised, as it seems there are clients that
4583 do this, and (what is worse) MTAs that accept it.
4585 PH/55 Added the add_header modified to ACLs. The use of "message" with "warn"
4586 will now be deprecated.
4588 PH/56 New os.c-cygwin from the Cygwin maintainer.
4590 JJ/06 exipick: added --unsorted option to allow unsorted output in all output
4591 formats (previously only available in exim formats via -bpr, -bpru,
4592 and -bpra. Now also available in native and exiqgrep formats)
4594 JJ/07 exipick: added --freeze and --thaw options to allow faster interaction
4595 with very large, slow to parse queues
4597 JJ/08 exipick: added ! as generic prefix to negate any criteria format
4599 JJ/09 exipick: miscellaneous performance enhancements (~24% improvements)
4601 PH/57 Tidies in SMTP dialogue display in debug output: (i) It was not showing
4602 responses to authentication challenges, though it was showing the
4603 challenges; (ii) I've removed the CR characters from the debug output for
4606 PH/58 Allow for the insertion of a newline as well as a space when a string
4607 is turned into more than one encoded-word during RFC 2047 encoding. The
4608 Sieve code now uses this.
4610 PH/59 Added the following errors that can be detected in retry rules: mail_4xx,
4611 data_4xx, lost_connection, tls_required.
4613 PH/60 When a VRFY deferred or FAILED, the log message rather than the user
4614 message was being sent as an SMTP response.
4616 PH/61 Add -l and -k options to exicyclog.
4618 PH/62 When verifying, if an address was redirected to one new address, so that
4619 verification continued, and the new address failed or deferred after
4620 having set something in $address_data, the value of $address_data was not
4621 passed back to the ACL. This was different to the case when no
4622 redirection occurred. The value is now passed back in both cases.
4624 PH/63 Changed the macro HAVE_LOGIN_CAP (see PH/41 for this release above) to
4625 HAVE_SETCLASSRESOURCES because there are different APIs in use that all
4626 use login_cap.h, so on its own it isn't the distinguishing feature. The
4627 new name refers directly to the setclassresources() function.
4629 PH/65 Added configuration files for NetBSD3.
4631 PH/66 Updated OS/Makefile-HP-UX for gcc 4.1.0 with HP-UX 11.
4633 PH/67 Fixed minor infelicity in the sorting of addresses to ensure that IPv6
4634 is preferred over IPv4.
4636 PH/68 The bounce_return_message and bounce_return_body options were not being
4637 honoured for bounces generated during the reception of non-SMTP messages.
4638 In particular, this applied to messages rejected by the ACL. This bug has
4639 been fixed. However, if bounce_return_message is true and bounce_return_
4640 body is false, the headers that are returned for a non-SMTP message
4641 include only those that have been read before the error was detected.
4642 (In the case of an ACL rejection, they have all been read.)
4644 PH/69 The HTML version of the specification is now built in a directory called
4645 spec_html instead of spec.html, because the latter looks like a path with
4646 a MIME-type, and this confuses some software.
4648 PH/70 Catch two compiler warnings in sieve.c.
4650 PH/71 Fixed an obscure and subtle bug (thanks Alexander & Matthias). The
4651 function verify_get_ident() calls ip_connect() to connect a socket, but
4652 if the "connect()" function timed out, ip_connect() used to close the
4653 socket. However, verify_get_ident() also closes the socket later, and in
4654 between Exim writes to the log, which may get opened at this point. When
4655 the socket was closed in ip_connect(), the log could get the same file
4656 descriptor number as the socket. This naturally causes chaos. The fix is
4657 not to close the socket in ip_connect(); the socket should be closed by
4658 the function that creates it. There was only one place in the code where
4659 this was missing, in the iplookup router, which I don't think anybody now
4660 uses, but I've fixed it anyway.
4662 PH/72 Make dns_again_means_nonexist apply to lookups using gethostbyname() as
4663 well as to direct DNS lookups. Otherwise the handling of names in host
4664 lists is inconsistent and therefore confusing.
4670 PH/01 Two changes to the default runtime configuration:
4672 (1) Move the checks for relay_from_hosts and authenticated clients from
4673 after to before the (commented out) DNS black list checks.
4675 (2) Add control=submission to the relay_from_hosts and authenticated
4676 clients checks, on the grounds that messages accepted by these
4677 statements are most likely to be submissions.
4679 PH/02 Several tidies to the handling of ${prvs and ${prvscheck:
4681 (1) Generate an error if the third argument for the ${prvs expansion is
4684 (2) Treat a missing third argument of ${prvscheck as if it were an empty
4687 (3) Reset the variables that are obtained from the first argument of
4688 ${prvscheck and used in the second argument before leaving the code,
4689 because their memory is reclaimed, so using them afterwards may do
4692 (4) Tidy up the code for expanding the arguments of ${prvscheck one by
4693 one (it's much easier than Tom thought :-).
4695 (5) Because of (4), we can now allow for the use of $prvscheck_result
4696 inside the third argument.
4698 PH/03 For some reason, the default setting of PATH when running a command from
4699 a pipe transport was just "/usr/bin". I have changed it to
4702 PH/04 SUPPORT_TRANSLATE_IP_ADDRESS and MOVE_FROZEN_MESSAGES did not cause
4703 anything to be listed in the output from -bV.
4705 PH/05 When a filter generated an autoreply, the entire To: header line was
4706 quoted in the delivery log line, like this:
4708 => >A.N.Other <ano@some.domain> <original@ddress> ...
4710 This has been changed so that it extracts the operative address. There
4711 may be more than one such address. If so, they are comma-separated, like
4714 => >ano@some.domain,ona@other.domain <original@ddress> ...
4716 PH/06 When a client host used a correct literal IP address in a HELO or EHLO
4717 command, (for example, EHLO [1.2.3.4]) and the client's IP address was
4718 not being looked up in the rDNS to get a host name, Exim was showing the
4719 IP address twice in Received: lines, even though the IP addresses were
4720 identical. For example:
4722 Received: from [1.2.3.4] (helo=[1.2.3.4])
4724 However, if the real host name was known, it was omitting the HELO data
4725 if it matched the actual IP address. This has been tidied up so that it
4726 doesn't show the same IP address twice.
4728 PH/07 When both +timestamp and +memory debugging was on, the value given by
4729 $tod_xxx expansions could be wrong, because the tod_stamp() function was
4730 called by the debug printing, thereby overwriting the timestamp buffer.
4731 Debugging no longer uses the tod_stamp() function when +timestamp is set.
4733 PH/08 When the original message was included in an autoreply transport, it
4734 always said "this is a copy of the message, including all the headers",
4735 even if body_only or headers_only was set. It now gives an appropriate
4738 PH/09 Applied a patch from the Sieve maintainer which:
4740 o fixes some comments
4741 o adds the (disabled) notify extension core
4742 o adds some debug output for the result of if/elsif tests
4743 o points to the current vacation draft in the documentation
4744 and documents the missing references header update
4748 o fixes a bug in processing the envelope test (when testing
4749 multiple envelope elements, the last element determined the
4752 PH/10 Exim was violating RFC 3834 ("Recommendations for Automatic Responses to
4753 Electronic Mail") by including:
4755 Auto-submitted: auto-generated
4757 in the messages that it generates (bounce messages and others, such as
4758 warnings). In the case of bounce messages for non-SMTP messages, there was
4759 also a typo: it was using "Auto_submitted" (underscore instead of
4760 hyphen). Since every message generated by Exim is necessarily in response
4761 to another message, thes have all been changed to:
4763 Auto-Submitted: auto-replied
4765 in accordance with these statements in the RFC:
4767 The auto-replied keyword:
4769 - SHOULD be used on messages sent in direct response to another
4770 message by an automatic process,
4772 - MUST NOT be used on manually-generated messages,
4774 - MAY be used on Delivery Status Notifications (DSNs) and Message
4775 Disposition Notifications (MDNs),
4777 - MUST NOT be used on messages generated by automatic or periodic
4778 processes, except for messages which are automatic responses to
4781 PH/11 Added "${if def:sender_address {(envelope-from <$sender_address>)\n\t}}"
4782 to the default Received: header definition.
4784 PH/12 Added log selector acl_warn_skipped (default on).
4786 PH/13 After a successful wildlsearch lookup, discard the values of numeric
4787 variables because (a) they are in the wrong storage pool and (b) even if
4788 they were copied, it wouldn't work properly because of the caching.
4790 PH/14 Add check_rfc2047_length to disable enforcement of RFC 2047 length
4791 checking when decoding. Apparently there are clients that generate
4792 overlong encoded strings. Why am I not surprised?
4794 PH/15 If the first argument of "${if match_address" was not empty, but did not
4795 contain an "@" character, Exim crashed. Now it writes a panic log message
4796 and treats the condition as false.
4798 PH/16 In autoreply, treat an empty string for "once" the same as unset.
4800 PH/17 A further patch from the Sieve maintainer: "Introduce the new Sieve
4801 extension "envelope-auth". The code is finished and in agreement with
4802 other implementations, but there is no documentation so far and in fact,
4803 nobody wrote the draft yet. This extension is currently #undef'ed, thus
4804 not changing the active code.
4806 Print executed "if" and "elsif" statements when debugging is used. This
4807 helps a great deal to understand what a filter does.
4809 Document more things not specified clearly in RFC3028. I had all this
4810 sorted out, when out of a sudden new issues came to my mind. Oops."
4812 PH/18 Exim was not recognizing the "net-" search type prefix in match_ip lists
4815 PH/19 Exim expands the IPv6 address given to -bh to its full non-abbreviated
4816 canonical form (as documented). However, after a host name lookup from
4817 the IP address, check_host() was doing a simple string comparison with
4818 addresses acquired from the DNS when checking that the found name did
4819 have the original IP as one of its addresses. Since any found IPv6
4820 addresses are likely to be in abbreviated form, the comparison could
4821 fail. Luckily, there already exists a function for doing the comparison
4822 by converting both addresses to binary, so now that is used instead of
4823 the text comparison.
4825 PH/20 There was another similar case to PH/19, when a complete host name was
4826 given in a host list; looking up its IP address could give an abbreviated
4827 form, whereas the current host's name might or might not be abbreviated.
4828 The same fix has been applied.
4834 PH/01 The ${base62: operator adjusted itself to base 36 when BASE_62 was
4835 set to 36 (for Darwin and Cygwin), but the ${base62d: operator did not.
4838 PH/02 Two minor problems detected in Cygwin: the os.{c,h} files had lost */ on
4839 the CVS lines, and there was a missing #if HAVE_IPV6 in host.c.
4841 PH/03 Typo: missing ".o" in src/pcre/Makefile.
4843 PH/04 Tighten up "personal" tests: Instead of testing for any "List-"
4844 header line, restrict the check to what is listed in RFCs 2369 and 2929.
4845 Also, for "Auto-Submitted", treat anything other than "no" as
4846 non-personal, in accordance with RFC 3834. (Previously it treated
4847 anything starting "auto-" as non-personal.)
4849 TF/01 The control=submission/name=... option had a problem with syntax
4850 errors if the name included a slash character. The /name= option
4851 now slurps the rest of the string, so it can include any characters
4852 but it must come last in the list of options (after /sender_retain
4855 PH/05 Some modifications to the interface to the fake nameserver for the new
4863 TK/01 Added the "success_on_redirect" address verification option. See
4864 NewStuff for rationale and an example.
4866 PH/01 Added support for SQLite, basic code supplied by David Woodhouse.
4868 PH/02 Patch to exigrep to allow it to work on syslog lines.
4870 PH/03 When creating an mbox file for a virus/spam scan, use fseek() instead of
4871 fread() to skip over the body file's header line, because in Cygwin the
4872 header line is locked and is inaccessible.
4874 PH/04 Added $message_exim_id, ultimately to replace $message_id (they will both
4875 co-exist for some time) to make it clear that it is the Exim ID that is
4876 referenced, not the Message-ID: header line.
4878 PH/05 Replaced all Tom's calls to snprintf() with calls to the internal
4879 string_format() function, because snprintf() does not exist on all
4882 PH/06 The use of forbid_filter_existstest now also locks out the use of the
4883 ${stat: expansion item.
4885 PH/07 Changed "SMTP protocol violation: synchronization error" into "SMTP
4886 protocol synchronization error", to keep the pedants happy.
4888 PH/08 Arrange for USE_INET_NTOA_FIX to be set in config.h for AIX systems as
4889 well as for IRIX systems, when gcc is being used. See the host.c source
4892 PH/09 Installed latest Cygwin configuration files from the Cygwin maintainer.
4894 PH/10 Named domain lists were not working if used in a queue_smtp_domains
4897 PH/11 Added support for the IGNOREQUOTA extension to LMTP, both to the lmtp
4898 transport and to the smtp transport in LMTP mode.
4900 TK/02 Remove one case of BASE64 error detection FTTB (undocumented anyway).
4902 PH/12 There was a missing call to search_tidyup() before the fork() in rda.c to
4903 run a filter in a subprocess. This could lead to confusion in subsequent
4904 lookups in the parent process. There should also be a search_tidyup() at
4905 the end of the subprocess.
4907 PH/13 Previously, if "verify = helo" was set in an ACL, the condition was true
4908 only if the host matched helo_try_verify_hosts, which caused the
4909 verification to occur when the EHLO/HELO command was issued. The ACL just
4910 tested the remembered result. Now, if a previous verification attempt has
4911 not happened, "verify = helo" does it there and then.
4913 JJ/01 exipick: added $message_exim_id variable (see 4.53-PH/04)
4915 TK/03 Fix log output including CR from clamd.
4917 PH/14 A reference to $reply_address when Reply-to: was empty and From: did not
4918 exist provoked a memory error which could cause a segfault.
4920 PH/15 Installed PCRE 6.2
4922 PH/17 Defined BIND_8_COMPAT in the Darwin os.h file.
4924 PH/18 Reversed 4.52/PH/17 because the HP-UX user found it wasn't the cause
4925 of the problem. Specifically, suggested +O2 rather than +O1 for the
4928 PH/19 Added sqlite_lock_timeout option (David Woodhouse's patch).
4930 PH/20 If a delivery was routed to a non-standard port by means of an SRV
4931 record, the port was not correctly logged when the outgoing_port log
4932 selector was set (it logged the transort's default port).
4934 PH/21 Added support for host-specific ports to manualroute, queryprogram,
4935 fallback_hosts, and "hosts" in the smtp transport.
4937 PH/22 If the log selector "outgoing_port" is set, the port is now also given on
4938 host errors such as "Connection refused".
4940 PH/23 Applied a patch to fix problems with exim-4.52 while doing radius
4941 authentication with radiusclient 0.4.9:
4943 - Error returned from rc_read_config was caught wrongly
4944 - Username/password not passed on to radius server due to wrong length.
4946 The presumption is that some radiusclient API changes for 4.51/PH/17
4947 were not taken care of correctly. The code is still untested by me (my
4948 Linux distribution still has 0.3.2 of radiusclient), but it was
4949 contributed by a Radius user.
4951 PH/24 When doing a callout, the value of $domain wasn't set correctly when
4952 expanding the "port" option of the smtp transport.
4954 TK/04 MIME ACL: Fix buffer underrun that occurs when EOF condition is met
4955 while reading a MIME header. Thanks to Tom Hughes for a patch.
4957 PH/24 Include config.h inside local_scan.h so that configuration settings are
4960 PH/25 Make $smtp_command_argument available after all SMTP commands. This means
4961 that in an ACL for RCPT (for example), you can examine exactly what was
4964 PH/26 Exim was recognizing IPv6 addresses of the form [IPv6:....] in EHLO
4965 commands, but it was not correctly comparing the address with the actual
4966 client host address. Thus, it would show the EHLO address in Received:
4967 header lines when this was not necessary.
4969 PH/27 Added the % operator to ${eval:}.
4971 PH/28 Exim tries to create and chdir to its spool directory when it starts;
4972 it should be ignoring failures (because with -C, for example, it has lost
4973 privilege). It wasn't ignoring creation failures other than "already
4976 PH/29 Added "crypteq" to the list of supported features that Exim outputs when
4979 PH/30 Fixed (presumably very longstanding) bug in exim_dbmbuild: if it failed
4980 because an input line was too long, either on its own, or by virtue of
4981 too many continuations, the temporary file was not being removed, and the
4982 return code was incorrect.
4984 PH/31 Missing "BOOL" in function definition in filtertest.c.
4986 PH/32 Applied Sieve patches from the maintainer.
4988 TK/05 Domainkeys: Accomodate for a minor API change in libdomainkeys 0.67.
4990 PH/33 Added "verify = not_blind".
4992 PH/34 There are settings for CHOWN_COMMAND and MV_COMMAND that can be used in
4993 Local/Makefile (with some defaults set). These are used in built scripts
4994 such as exicyclog, but they have never been used in the exim_install
4995 script (though there are many overriding facilities there). I have
4996 arranged that the exim_install script now takes note of these two
4999 PH/35 Installed configuration files for Dragonfly.
5001 PH/36 When a locally submitted message by a trusted user did not contain a
5002 From: header, and the sender address was obtained from -f or from an SMTP
5003 MAIL command, and the trusted user did not use -F to supply a sender
5004 name, $originator_name was incorrectly used when constructing a From:
5005 header. Furthermore, $originator_name was used for submission mode
5006 messages from external hosts without From: headers in a similar way,
5007 which is clearly wrong.
5009 PH/37 Added control=suppress_local_fixups.
5011 PH/38 When log_selector = +received_sender was set, and the addition of the
5012 sender made the log line's construction buffer exactly full, or one byte
5013 less than full, an overflow happened when the terminating "\n" was
5016 PH/39 Added a new log selector, "unknown_in_list", which provokes a log entry
5017 when the result of a list match is failure because a DNS lookup failed.
5019 PH/40 RM_COMMAND is now used in the building process.
5021 PH/41 Added a "distclean" target to the top-level Makefile; it deletes all
5022 the "build-* directories that it finds.
5024 PH/42 (But a TF fix): In a domain list, Exim incorrectly matched @[] if the IP
5025 address in a domain literal was a prefix of an interface address.
5027 PH/43 (Again a TF fix): In the dnslookup router, do not apply widen_domains
5028 when verifying a sender address, unless rewrite_headers is false.
5030 PH/44 Wrote a long comment about why errors_to addresses are verified as
5031 recipients, not senders.
5033 TF/01 Add missing LIBS=-lm to OS/Makefile-OpenBSD which was overlooked when
5034 the ratelimit ACL was added.
5036 PH/45 Added $smtp_command for the full command (cf $smtp_command_argument).
5038 PH/46 Added extra information about PostgreSQL errors to the error string.
5040 PH/47 Added an interface to a fake DNS resolver for use by the new test suite,
5041 avoiding the need to install special zones in a real server. This is
5042 backwards compatible; if it can't find the fake resolver, it drops back.
5043 Thus, both old and new test suites can be run.
5045 TF/02 Added util/ratelimit.pl
5047 TF/03 Minor fix to the ratelimit code to improve its behaviour in case the
5048 clock is set back in time.
5050 TF/04 Fix the ratelimit support in exim_fixdb. Patch provided by Brian
5051 Candler <B.Candler@pobox.com>.
5053 TF/05 The fix for PH/43 was not completely correct; widen_domains is always
5054 OK for addresses that are the result of redirections.
5056 PH/48 A number of further additions for the benefit of the new test suite,
5057 including a fake gethostbyname() that interfaces to the fake DNS resolver
5060 TF/06 The fix for widen_domains has also been applied to qualify_single and
5061 search_parents which are the other dnslookup options that can cause
5064 PH/49 Michael Haardt's randomized retrying, but as a separate retry parameter
5067 PH/50 Make never_users, trusted_users, admin_groups, trusted_groups expandable.
5069 TF/07 Exim produced the error message "an SRV record indicated no SMTP
5070 service" if it encountered an MX record with an empty target hostname.
5071 The message is now "an MX or SRV record indicated no SMTP service".
5073 TF/08 Change PH/13 introduced the possibility that verify=helo may defer,
5074 if the DNS of the sending site is misconfigured. This is quite a
5075 common situation. This change restores the behaviour of treating a
5076 helo verification defer as a failure.
5078 PH/51 If self=fail was set on a router, the bounce message did not include the
5079 actual error message.
5085 TF/01 Added support for Client SMTP Authorization. See NewStuff for details.
5087 PH/01 When a transport filter timed out in a pipe delivery, and the pipe
5088 command itself ended in error, the underlying message about the transport
5089 filter timeout was being overwritten with the pipe command error. Now the
5090 underlying error message should be appended to the second error message.
5092 TK/01 Fix poll() being unavailable on Mac OSX 10.2.
5094 PH/02 Reduce the amount of output that "make" produces by default. Full output
5095 can still be requested.
5097 PH/03 The warning log line about a condition test deferring for a "warn" verb
5098 was being output only once per connection, rather than after each
5099 occurrence (because it was using the same function as for successful
5100 "warn" verbs). This seems wrong, so I have changed it.
5102 TF/02 Two buglets in acl.c which caused Exim to read a few bytes of memory that
5103 it should not have, which might have caused a crash in the right
5104 circumstances, but probably never did.
5106 PH/04 Installed a modified version of Tony Finch's patch to make submission
5107 mode fix the return path as well as the Sender: header line, and to
5108 add a /name= option so that you can make the user's friendly name appear
5111 TF/03 Added the control = fakedefer ACL modifier.
5113 TF/04 Added the ratelimit ACL condition. See NewStuff for details. Thanks to
5114 Mark Lowes for thorough testing.
5116 TK/02 Rewrote SPF support to work with libspf2 versions >1.2.0.
5118 TK/03 Merged latest SRS patch from Miles Wilton.
5120 PH/05 There's a shambles in IRIX6 - it defines EX_OK in unistd.h which conflicts
5121 with the definition in sysexits.h (which is #included earlier).
5122 Fortunately, Exim does not actually use EX_OK. The code used to try to
5123 preserve the sysexits.h value, by assuming that macro definitions were
5124 scanned for macro replacements. I have been disabused of this notion,
5125 so now the code just undefines EX_OK before #including unistd.h.
5127 PH/06 There is a timeout for writing blocks of data, set by, e.g. data_timeout
5128 in the smtp transport. When a block could not be written in a single
5129 write() function, the timeout was being re-applied to each part-write.
5130 This seems wrong - if the receiver was accepting one byte at a time it
5131 would take for ever. The timeout is now adjusted when this happens. It
5132 doesn't have to be particularly precise.
5134 TK/04 Added simple SPF lookup method in EXPERIMENTAL_SPF. See NewStuff for
5135 details. Thanks to Chris Webb <chris@arachsys.com> for the patch!
5137 PH/07 Added "fullpostmaster" verify option, which does a check to <postmaster>
5138 without a domain if the check to <postmaster@domain> fails.
5140 SC/01 Eximstats: added -xls and the ability to specify output files
5141 (patch written by Frank Heydlauf).
5143 SC/02 Eximstats: use FileHandles for outputting results.
5145 SC/03 Eximstats: allow any combination of xls, txt, and html output.
5147 SC/04 Eximstats: fixed display of large numbers with -nvr option
5149 SC/05 Eximstats: fixed merging of reports with empty tables.
5151 SC/06 Eximstats: added the -include_original_destination flag
5153 SC/07 Eximstats: removed tabs and trailing whitespace.
5155 TK/05 Malware: Improve on aveserver error handling. Patch from Alex Miller.
5157 TK/06 MBOX spool code: Add real "From " MBOX separator line
5158 so the .eml file is really in mbox format (even though
5159 most programs do not really care). Patch from Alex Miller.
5161 TK/07 MBOX spool code: Add X-Envelope-From: and X-Envelope-To: headers.
5162 The latter is generated from $received_to and is only set if the
5163 message has one envelope recipient. SA can use these headers,
5164 obviously out-of-the-box. Patch from Alex Miller.
5166 PH/08 The ${def test on a variable was returning false if the variable's
5167 value was "0", contrary to what the specification has always said!
5168 The result should be true unless the variable is empty.
5170 PH/09 The syntax error of a character other than { following "${if
5171 def:variable_name" (after optional whitespace) was not being diagnosed.
5172 An expansion such as ${if def:sender_ident:{xxx}{yyy}} in which an
5173 accidental colon was present, for example, could give incorrect results.
5175 PH/10 Tidied the code in a number of places where the st_size field of a stat()
5176 result is used (not including appendfile, where other changes are about
5179 PH/11 Upgraded appendfile so that quotas larger than 2G are now supported.
5180 This involved changing a lot of size variables from int to off_t. It
5181 should work with maildirs and everything.
5183 TK/08 Apply fix provided by Michael Haardt to prevent deadlock in case of
5184 spamd dying while we are connected to it.
5186 TF/05 Fixed a ${extract error message typo reported by Jeremy Harris
5189 PH/12 Applied Alex Kiernan's patch for the API change for the error callback
5190 function for BDB 4.3.
5192 PH/13 Changed auto_thaw such that it does not apply to bounce messages.
5194 PH/14 Imported PCRE 6.0; this was more than just a trivial operation because
5195 the sources for PCRE have been re-arranged and more files are now
5198 PH/15 The code I had for printing potentially long long variables in PH/11
5199 above was not the best (it lost precision). The length of off_t variables
5200 is now inspected at build time, and an appropriate printing format (%ld
5201 or %lld) is chosen and #defined by OFF_T_FMT. We also define LONGLONG_T
5202 to be "long long int" or "long int". This is needed for the internal
5203 formatting function string_vformat().
5205 PH/16 Applied Matthew Newton's patch to exicyclog: "If log_file_path is set in
5206 the configuration file to be ":syslog", then the script "guesses" where
5207 the logs files are, rather than using the compiled in default. In our
5208 case the guess is not the same as the compiled default, so the script
5209 suddenly stopped working when I started to use syslog. The patch checks
5210 to see if log_file_path is "". If so, it attempts to read it from exim
5211 with no configuration file to get the compiled in version, before it
5212 falls back to the previous guessing code."
5214 TK/09 Added "prvs" and "prvscheck" expansion items. These help a lot with
5215 implementing BATV in an Exim configuration. See NewStuff for the gory
5218 PH/17 Applied Michael Haardt's patch for HP-UX, affecting only the os.h and
5219 Makefile that are specific to HP-UX.
5221 PH/18 If the "use_postmaster" option was set for a recipient callout together
5222 with the "random" option, the postmaster address was used as the MAIL
5223 FROM address for the random test, but not for the subsequent recipient
5224 test. It is now used for both.
5226 PH/19 Applied Michael Haardt's patch to update Sieve to RFC3028bis. "The
5227 patch removes a few documentation additions to RFC 3028, because the
5228 latest draft now contains them. It adds the new en;ascii-case comparator
5229 and a new error check for 8bit text in MIME parts. Comparator and
5230 require names are now matched exactly. I enabled the subaddress
5231 extension, but it is not well tested yet (read: it works for me)."
5233 PH/20 Added macros for time_t as for off_t (see PH/15 above) and used them to
5234 rework some of the code of TK/09 above to avoid the hardwired use of
5235 "%lld" and "long long". Replaced the call to snprintf() with a call to
5238 PH/21 Added some other messages to those in 4.51/PH/42, namely "All relevant MX
5239 records point to non-existent hosts", "retry timeout exceeded", and
5240 "retry time not reached for any host after a long failure period".
5242 PH/22 Fixed some oversights/typos causing bugs when Exim is compiled with
5243 experimental DomainKeys support:
5245 (1) The filter variables $n0-$n9 and $sn0-$sn9 were broken.
5246 (2) On an error such as an illegally used "control", the wrong name for
5247 the control was given.
5249 These problems did NOT occur unless DomainKeys support was compiled.
5251 PH/23 Added daemon_startup_retries and daemon_startup_sleep.
5253 PH/24 Added ${if match_ip condition.
5255 PH/25 Put debug statements on either side of calls to EXIM_DBOPEN() for hints
5256 databases so that it will be absolutely obvious if a crash occurs in the
5257 DB library. This is a regular occurrence (often caused by mis-matched
5260 PH/26 Insert a lot of missing (void) casts for functions such as chown(),
5261 chmod(), fcntl(), sscanf(), and other functions from stdio.h. These were
5262 picked up on a user's system that detects such things. There doesn't seem
5263 to be a gcc warning option for this - only an attribute that has to be
5264 put on the function's prototype. It seems that in Fedora Core 4 they have
5265 set this on a number of new functions. No doubt there will be more in due
5268 PH/27 If a dnslookup or manualroute router is set with verify=only, it need not
5269 specify a transport. However, if an address that was verified by such a
5270 router was the subject of a callout, Exim crashed because it tried to
5271 read the rcpt_include_affixes from the non-existent transport. Now it
5272 just assumes that the setting of that option is false. This bug was
5273 introduced by 4.51/PH/31.
5275 PH/28 Changed -d+all to exclude +memory, because that information is very
5276 rarely of interest, but it makes the output a lot bigger. People tend to
5277 do -d+all out of habit.
5279 PH/29 Removed support for the Linux-libc5 build, as it is obsolete and the
5280 code in os-type was giving problems when libc.so lives in lib64, like on
5283 PH/30 Exim's DNS code uses the original T_xxx names for DNS record times. These
5284 aren't the modern standard, and it seems that some systems' include files
5285 don't always have them. Exim was already checking for some of the newer
5286 ones like T_AAAA, and defining it itself. I've added checks for all the
5287 record types that Exim uses.
5289 PH/31 When using GnuTLS, if the parameters cache file did not exist, Exim was
5290 not automatically generating a new one, as it is supposed to. This
5291 prevented TLS from working. If the file did exist, but contained invalid
5292 data, a new version was generated, as expected. It was only the case of a
5293 non-existent file that was broken.
5295 TK/10 Domainkeys: Fix a bug in verification that caused a crash in conjunction
5296 with a change in libdomainkeys > 0.64.
5298 TK/11 Domainkeys: Change the logic how the "testing" policy flag is retrieved
5299 from DNS. If the selector record carries the flag, it now has
5300 precedence over the domain-wide flag.
5302 TK/12 Cleared some compiler warnings related to SPF, SRS and DK code.
5304 PH/32 In mua_wrapper mode, if an smtp transport configuration error (such as
5305 the use of a port name that isn't defined in /etc/services) occurred, the
5306 message was deferred as in a normal delivery, and thus remained on the
5307 spool, instead of being failed because of the mua_wrapper setting. This
5308 is now fixed, and I tidied up some of the mua_wrapper messages at the
5311 SC/08 Eximstats: whilst parsing the mainlog(s), store information about
5312 the messages in a hash of arrays rather than using individual hashes.
5313 This is a bit cleaner and results in dramatic memory savings, albeit
5314 at a slight CPU cost.
5316 SC/09 Eximstats: added the -show_rt<list> and the -show_dt<list> flags
5317 as requested by Marc Sherman.
5319 SC/10 Eximstats: added histograms for user specified patterns as requested
5322 SC/11 Eximstats: v1.43 - bugfix for pattern histograms with -h0 specified.
5324 PH/33 Patch from the Cygwin maintainer to add "b" to all occurences of
5325 fopen() in the content-scanning modules that did not already have it.
5331 TK/01 Added Yahoo DomainKeys support via libdomainkeys. See
5332 doc/experimental-spec.txt for details. (http://domainkeys.sf.net)
5334 TK/02 Fix ACL "control" statement not being available in MIME ACL.
5336 TK/03 Fix ACL "regex" condition not being available in MIME ACL.
5338 PH/01 Installed a patch from the Sieve maintainer that allows -bf to be used
5339 to test Sieve filters that use "vacation".
5341 PH/02 Installed a slightly modified version of Nikos Mavrogiannopoulos' patch
5342 that changes the way the GnuTLS parameters are stored in the cache file.
5343 The new format can be generated externally. For backward compatibility,
5344 if the data in the cache doesn't make sense, Exim assumes it has read an
5345 old-format file, and it generates new data and writes a new file. This
5346 means that you can't go back to an older release without removing the
5349 PH/03 A redirect router that has both "unseen" and "one_time" set does not
5350 work if there are any delivery delays because "one_time" forces the
5351 parent to be marked "delivered", so its unseen clone is never tried
5352 again. For this reason, Exim now forbids the simultaneous setting of
5355 PH/04 Change 4.11/85 fixed an obscure bug concerned with addresses that are
5356 redirected to themselves ("homonym" addresses). Read the long ChangeLog
5357 entry if you want to know the details. The fix, however, neglected to
5358 consider the case when local delivery batching is involved. The test for
5359 "previously delivered" was not happening when checking to see if an
5360 address could be batched with a previous (undelivered) one; under
5361 certain circumstances this could lead to multiple deliveries to the same
5364 PH/05 Renamed the macro SOCKLEN_T as EXIM_SOCKLEN_T because AIX uses SOCKLEN_T
5365 in its include files, and this causes problems building Exim.
5367 PH/06 A number of "verify =" ACL conditions have no options (e.g. verify =
5368 header_syntax) but Exim was just ignoring anything given after a slash.
5369 In particular, this caused confusion with an attempt to use "verify =
5370 reverse_host_lookup/defer_ok". An error is now given when options are
5371 supplied for verify items that do not have them. (Maybe reverse_host_
5372 lookup should have a defer_ok option, but that's a different point.)
5374 PH/07 Increase the size of the buffer for incoming SMTP commands from 512 (as
5375 defined by RFC 821) to 2048, because there were problems with some AUTH
5376 commands, and RFC 1869 says the size should be increased for extended
5377 SMTP commands that take arguments.
5379 PH/08 Added ${dlfunc dynamically loaded function for expansion (code from Tony
5382 PH/09 Previously, an attempt to use ${perl when it wasn't compiled gave an
5383 "unknown" error; now it says that the functionality isn't in the binary.
5385 PH/10 Added a nasty fudge to try to recognize and flatten LDAP passwords in
5386 an address' error message when a string expansion fails (syntax or
5387 whatever). Otherwise the password may appear in the log. Following change
5388 PH/42 below, there is no longer a chance of it appearing in a bounce
5391 PH/11 Installed exipick version 20050225.0 from John Jetmore.
5393 PH/12 If the last host in a fallback_hosts list was multihomed, only the first
5394 of its addresses was ever tried. (Bugzilla bug #2.)
5396 PH/13 If "headers_add" in a transport didn't end in a newline, Exim printed
5397 the result incorrectly in the debug output. (It correctly added a newline
5398 to what was transported.)
5400 TF/01 Added $received_time.
5402 PH/14 Modified the default configuration to add an acl_smtp_data ACL, with
5403 commented out examples of how to interface to a virus scanner and to
5404 SpamAssassin. Also added commented examples of av_scanner and
5405 spamd_address settings.
5407 PH/15 Further to TK/02 and TK/03 above, tidied up the tables of what conditions
5408 and controls are allowed in which ACLs. There were a couple of minor
5409 errors. Some of the entries in the conditions table (which is a table of
5410 where they are NOT allowed) were getting very unwieldy; rewrote them as a
5411 negation of where the condition IS allowed.
5413 PH/16 Installed updated OS/os.c-cygwin from the Cygwin maintainer.
5415 PH/17 The API for radiusclient changed at release 0.4.0. Unfortunately, the
5416 header file does not have a version number, so I've had to invent a new
5417 value for RADIUS_LIB_TYPE, namely "RADIUSCLIENTNEW" to request the new
5418 API. The code is untested by me (my Linux distribution still has 0.3.2 of
5419 radiusclient), but it was contributed by a Radius user.
5421 PH/18 Installed Lars Mainka's patch for the support of CRL collections in
5422 files or directories, for OpenSSL.
5424 PH/19 When an Exim process that is running as root has to create an Exim log
5425 file, it does so in a subprocess that runs as exim:exim so as to get the
5426 ownership right at creation (otherwise, other Exim processes might see
5427 the file with the wrong ownership). There was no test for failure of this
5428 fork() call, which would lead to the process getting stuck as it waited
5429 for a non-existent subprocess. Forks do occasionally fail when resources
5430 run out. I reviewed all the other calls to fork(); they all seem to check
5433 PH/20 When checking for unexpected SMTP input at connect time (before writing
5434 the banner), Exim was not dealing correctly with a non-positive return
5435 from the read() function. If the client had disconnected by this time,
5436 the result was a log entry for a synchronization error with an empty
5437 string after "input=" when read() returned zero. If read() returned -1
5438 (an event I could not check), uninitialized data bytes were printed.
5439 There were reports of junk text (parts of files, etc) appearing after
5442 PH/21 Added acl_not_smtp_mime to allow for MIME scanning for non-SMTP messages.
5444 PH/22 Added support for macro redefinition, and (re)definition in between
5445 driver and ACL definitions.
5447 PH/23 The cyrus_sasl authenticator was expanding server_hostname, but then
5448 forgetting to use the resulting value; it was using the unexpanded value.
5450 PH/24 The cyrus_sasl authenticator was advertising mechanisms for which it
5451 hadn't been configured. The fix is from Juergen Kreileder, who
5452 understands it better than I do:
5454 "Here's what I see happening with three configured cyrus_sasl
5455 authenticators configured (plain, login, cram-md5):
5457 On startup auth_cyrus_sasl_init() gets called for each of these.
5458 This means three calls to sasl_listmech() without a specified mech_list.
5459 => SASL tests which mechs of all available mechs actually work
5460 => three warnings about OTP not working
5461 => the returned list contains: plain, login, cram-md5, digest-md5, ...
5463 With the patch, sasl_listmech() also gets called three times. But now
5464 SASL's mech_list option is set to the server_mech specified in the the
5465 authenticator. Or in other words, the answer from sasl_listmech()
5466 gets limited to just the mech you're testing for (which is different
5468 => the return list contains just 'plain' or 'login', 'cram-md5' or
5469 nothing depending on the value of ob->server_mech.
5471 I've just tested the patch: Authentication still works fine,
5472 unavailable mechs specified in the exim configuration are still
5473 caught, and the auth.log warnings about OTP are gone."
5475 PH/25 When debugging is enabled, the contents of the command line are added
5476 to the debugging output, even when log_selector=+arguments is not
5479 PH/26 Change scripts/os-type so that when "uname -s" returns just "GNU", the
5480 answer is "GNU", and only if the return is "GNU/something" is the answer
5483 PH/27 $acl_verify_message is now set immediately after the failure of a
5484 verification in an ACL, and so is available in subsequent modifiers. In
5485 particular, the message can be preserved by coding like this:
5487 warn !verify = sender
5488 set acl_m0 = $acl_verify_message
5490 Previously, $acl_verify_message was set only while expanding "message"
5491 and "log_message" when a very denied access.
5493 PH/28 Modified OS/os.c-Linux with
5495 -#ifndef OS_LOAD_AVERAGE
5496 +#if !defined(OS_LOAD_AVERAGE) && defined(__linux__)
5498 to make Exim compile on kfreebsd-gnu. (I'm totally confused about the
5499 nomenclature these days.)
5501 PH/29 Installed patch from the Sieve maintainer that adds the options
5502 sieve_useraddress and sieve_subaddress to the redirect router.
5504 PH/30 In these circumstances:
5505 . Two addresses routed to the same list of hosts;
5506 . First host does not offer TLS;
5507 . First host accepts first address;
5508 . First host gives temporary error to second address;
5509 . Second host offers TLS and a TLS session is established;
5510 . Second host accepts second address.
5511 Exim incorrectly logged both deliveries with the TLS parameters (cipher
5512 and peerdn, if requested) that were in fact used only for the second
5515 PH/31 When doing a callout as part of verifying an address, Exim was not paying
5516 attention to any local part prefix or suffix that was matched by the
5517 router that accepted the address. It now behaves in the same way as it
5518 does for delivery: the affixes are removed from the local part unless
5519 rcpt_include_affixes is set on the transport.
5521 PH/32 Add the sender address, as F=<...>, to the log line when logging a
5522 timeout during the DATA phase of an incoming message.
5524 PH/33 Sieve envelope tests were broken for match types other than :is. I have
5525 applied a patch sanctioned by the Sieve maintainer.
5527 PH/34 Change 4.50/80 broke Exim in that it could no longer handle cases where
5528 the uid or gid is negative. A case of a negative gid caused this to be
5529 noticed. The fix allows for either to be negative.
5531 PH/35 ACL_WHERE_MIME is now declared unconditionally, to avoid too much code
5532 clutter, but the tables that are indexed by ACL_WHERE_xxx values had been
5535 PH/36 The change PH/12 above was broken. Fixed it.
5537 PH/37 Exim used to check for duplicate addresses in the middle of routing, on
5538 the grounds that routing the same address twice would always produce the
5539 same answer. This might have been true once, but it is certainly no
5540 longer true now. Routing a child address may depend on the previous
5541 routing that produced that child. Some complicated redirection strategies
5542 went wrong when messages had multiple recipients, and made Exim's
5543 behaviour dependent on the order in which the addresses were given.
5545 I have moved the duplicate checking until after the routing is complete.
5546 Exim scans the addresses that are assigned to local and remote
5547 transports, and removes any duplicates. This means that more work will be
5548 done, as duplicates will always all be routed, but duplicates are
5549 presumably rare, so I don't expect this is of any significance.
5551 For deliveries to pipes, files, and autoreplies, the duplicate checking
5552 still happens during the routing process, since they are not going to be
5555 PH/38 Installed a patch from Ian Freislich, with the agreement of Tom Kistner.
5556 It corrects a timeout issue with spamd. This is Ian's comment: "The
5557 background is that sometimes spamd either never reads data from a
5558 connection it has accepted, or it never writes response data. The exiscan
5559 spam.[ch] uses a 3600 second timeout on spamd socket reads, further, it
5560 blindly assumes that writes won't block so it may never time out."
5562 PH/39 Allow G after quota size as well as K and M.
5564 PH/40 The value set for $authenticated_id in an authenticator may not contain
5565 binary zeroes or newlines because the value is written to log lines and
5566 to spool files. There was no check on this. Now the value is run through
5567 the string_printing() function so that such characters are converted to
5568 printable escape sequences.
5570 PH/41 $message_linecount is a new variable that contains the total number of
5571 lines in the message. Compare $body_linecount, which is the count for the
5574 PH/42 Exim no longer gives details of delivery errors for specific addresses in
5575 bounce and delay warning messages, except in certain special cases, which
5578 (a) An SMTP error message from a remote host;
5579 (b) A message specified in a :fail: redirection;
5580 (c) A message specified in a "fail" command in a system filter;
5581 (d) A message specified in a FAIL return from the queryprogram router;
5582 (e) A message specified by the cannot_route_message router option.
5584 In these cases only, Exim does include the error details in bounce and
5585 warning messages. There are also a few cases where bland messages such
5586 as "unrouteable address" or "local delivery error" are given.
5588 PH/43 $value is now also set for the "else" part of a ${run expansion.
5590 PH/44 Applied patch from the Sieve maintainer: "The vacation draft is still
5591 being worked on, but at least Exim now implements the latest version to
5594 PH/45 In a pipe transport, although a timeout while waiting for the pipe
5595 process to complete was treated as a delivery failure, a timeout while
5596 writing the message to the pipe was logged, but erroneously treated as a
5597 successful delivery. Such timeouts include transport filter timeouts. For
5598 consistency with the overall process timeout, these timeouts are now
5599 treated as errors, giving rise to delivery failures by default. However,
5600 there is now a new Boolean option for the pipe transport called
5601 timeout_defer, which, if set TRUE, converts the failures into defers for
5602 both kinds of timeout. A transport filter timeout is now identified in
5605 PH/46 The "scripts/Configure-config.h" script calls "make" at one point. On
5606 systems where "make" and "gmake" are different, calling "gmake" at top
5607 level broke things. I've arranged for the value of $(MAKE) to be passed
5608 from the Makefile to this script so that it can call the same version of
5612 A note about Exim versions 4.44 and 4.50
5613 ----------------------------------------
5615 Exim 4.50 was meant to be the next release after 4.43. It contains a lot of
5616 changes of various kinds. As a consequence, a big documentation update was
5617 needed. This delayed the release for rather longer than seemed good, especially
5618 in the light of a couple of (minor) security issues. Therefore, the changes
5619 that fixed bugs were backported into 4.43, to create a 4.44 maintenance
5620 release. So 4.44 and 4.50 are in effect two different branches that both start
5623 I have left the 4.50 change log unchanged; it contains all the changes since
5624 4.43. The change log for 4.44 is below; many of its items are identical to
5625 those for 4.50. This seems to be the most sensible way to preserve the
5626 historical information.
5632 1. Minor wording change to the doc/README.SIEVE file.
5634 2. Change 4.43/35 introduced a bug: if quota_filecount was set, the
5635 computation of the current number of files was incorrect.
5637 3. Closing a stable door: arrange to panic-die if setitimer() ever fails. The
5638 bug fixed in 4.43/37 would have been diagnosed quickly if this had been in
5641 4. Give more explanation in the error message when the command for a transport
5642 filter fails to execute.
5644 5. There are several places where Exim runs a non-Exim command in a
5645 subprocess. The SIGUSR1 signal should be disabled for these processes. This
5646 was being done only for the command run by the queryprogram router. It is
5647 now done for all such subprocesses. The other cases are: ${run, transport
5648 filters, and the commands run by the lmtp and pipe transports.
5650 6. Added CONFIGURE_GROUP build-time option.
5652 7. Some older OS have a limit of 256 on the maximum number of file
5653 descriptors. Exim was using setrlimit() to set 1000 as a large value
5654 unlikely to be exceeded. Change 4.43/17 caused a lot of logging on these
5655 systems. I've change it so that if it can't get 1000, it tries for 256.
5657 8. "control=submission" was allowed, but had no effect, in a DATA ACL. This
5658 was an oversight, and furthermore, ever since the addition of extra
5659 controls (e.g. 4.43/32), the checks on when to allow different forms of
5660 "control" were broken. There should now be diagnostics for all cases when a
5661 control that does not make sense is encountered.
5663 9. Added the /retain_sender option to "control=submission".
5665 10. $recipients is now available in the predata ACL (oversight).
5667 11. Tidy the search cache before the fork to do a delivery from a message
5668 received from the command line. Otherwise the child will trigger a lookup
5669 failure and thereby defer the delivery if it tries to use (for example) a
5670 cached ldap connection that the parent has called unbind on.
5672 12. If verify=recipient was followed by verify=sender in a RCPT ACL, the value
5673 of $address_data from the recipient verification was clobbered by the
5674 sender verification.
5676 13. The value of address_data from a sender verification is now available in
5677 $sender_address_data in subsequent conditions in the ACL statement.
5679 14. Added forbid_sieve_filter and forbid_exim_filter to the redirect router.
5681 15. Added a new option "connect=<time>" to callout options, to set a different
5684 16. If FIXED_NEVER_USERS was defined, but empty, Exim was assuming the uid 0
5685 was its contents. (It was OK if the option was not defined at all.)
5687 17. A "Completed" log line is now written for messages that are removed from
5688 the spool by the -Mrm option.
5690 18. New variables $sender_verify_failure and $recipient_verify_failure contain
5691 information about exactly what failed.
5693 19. Added -dd to debug only the daemon process.
5695 20. Incorporated Michael Haardt's patch to ldap.c for improving the way it
5696 handles timeouts, both on the server side and network timeouts. Renamed the
5697 CONNECT parameter as NETTIMEOUT (but kept the old name for compatibility).
5699 21. The rare case of EHLO->STARTTLS->HELO was setting the protocol to "smtp".
5700 It is now set to "smtps".
5702 22. $host_address is now set to the target address during the checking of
5703 ignore_target_hosts.
5705 23. When checking ignore_target_hosts for an ipliteral router, no host name was
5706 being passed; this would have caused $sender_host_name to have been used if
5707 matching the list had actually called for a host name (not very likely,
5708 since this list is usually IP addresses). A host name is now passed as
5711 24. Changed the calls that set up the SIGCHLD handler in the daemon to use the
5712 code that specifies a non-restarting handler (typically sigaction() in
5713 modern systems) in an attempt to fix a rare and obscure crash bug.
5715 25. Narrowed the window for a race in the daemon that could cause it to ignore
5716 SIGCHLD signals. This is not a major problem, because they are used only to
5717 wake it up if nothing else does.
5719 26. A malformed maildirsize file could cause Exim to calculate negative values
5720 for the mailbox size or file count. Odd effects could occur as a result.
5721 The maildirsize information is now recalculated if the size or filecount
5724 27. Added HAVE_SYS_STATVFS_H to the os.h file for Linux, as it has had this
5725 support for a long time. Removed HAVE_SYS_VFS_H.
5727 28. Installed the latest version of exipick from John Jetmore.
5729 29. In an address list, if the pattern was not a regular expression, an empty
5730 subject address (from a bounce message) matched only if the pattern was an
5731 empty string. Non-empty patterns were not even tested. This was the wrong
5732 because it is perfectly reasonable to use an empty address as part of a
5733 database query. An empty address is now tested by patterns that are
5734 lookups. However, all the other forms of pattern expect the subject to
5735 contain a local part and a domain, and therefore, for them, an empty
5736 address still always fails if the pattern is not itself empty.
5738 30. Exim went into a mad DNS loop when attempting to do a callout where the
5739 host was specified on an smtp transport, and looking it up yielded more
5740 than one IP address.
5742 31. Re-factored the code for checking spool and log partition space into a
5743 function that finds that data and another that does the check. The former
5744 is then used to implement four new variables: $spool_space, $log_space,
5745 $spool_inodes, and $log_inodes.
5747 32. The RFC2047 encoding function was originally intended for short strings
5748 such as real names; it was not keeping to the 75-character limit for
5749 encoded words that the RFC imposes. It now respects the limit, and
5750 generates multiple encoded words if necessary. To be on the safe side, I
5751 have increased the buffer size for the ${rfc2047: expansion operator from
5754 33. It is now permitted to omit both strings after an "if" condition; if the
5755 condition is true, the result is "true". As before, when the second string
5756 is omitted, a false condition yields an empty string. This makes it less
5757 cumbersome to write custom ACL and router conditions.
5759 34. Failure to deliver a bounce message always caused it to be frozen, even if
5760 there was an errors_to setting on the router. The errors_to setting is now
5763 35. If an IPv6 address is given for -bh or -bhc, it is now converted to the
5764 canonical form (fully expanded) before being placed in
5765 $sender_host_address.
5767 36. The table in the code that translates DNS record types into text (T_A to
5768 "A" for instance) was missing entries for NS and CNAME. It is just possible
5769 that this could have caused confusion if both these types were looked up
5770 for the same domain, because the text type is used as part of Exim's
5771 per-process caching. But the chance of anyone hitting this buglet seems
5774 37. The dnsdb lookup has been extended in a number of ways.
5776 (1) There is a new type, "zns", which walks up the domain tree until it
5777 finds some nameserver records. It should be used with care.
5779 (2) There is a new type, "mxh", which is like "mx" except that it returns
5780 just the host names, not the priorities.
5782 (3) It is now possible to give a list of domains (or IP addresses) to be
5783 looked up. The behaviour when one of the lookups defers can be
5784 controlled by a keyword.
5786 (4) It is now possible to specify the separator character for use when
5787 multiple records are returned.
5789 38. The dnslists ACL condition has been extended: it is now possible to supply
5790 a list of IP addresses and/or domains to be looked up in a particular DNS
5793 39. Added log_selector=+queue_time_overall.
5795 40. When running the queue in the test harness, wait just a tad after forking a
5796 delivery process, to get repeatability of debugging output.
5798 41. Include certificate and key file names in error message when GnuTLS fails
5799 to set them up, because the GnuTLS error message doesn't include the name
5800 of the failing file when there is a problem reading it.
5802 42. Allow both -bf and -bF in the same test run.
5804 43. Did the same fix as 41 above for OpenSSL, which had the same infelicity.
5806 44. The "Exiscan patch" is now merged into the mainline Exim source.
5808 45. Sometimes the final signoff response after QUIT could fail to get
5809 transmitted in the non-TLS case. Testing !tls_active instead of tls_active
5810 < 0 before doing a fflush(). This bug looks as though it goes back to the
5811 introduction of TLS in release 3.20, but "sometimes" must have been rare
5812 because the tests only now provoked it.
5814 46. Reset the locale to "C" after calling embedded Perl, in case it was changed
5815 (this can affect the format of dates).
5817 47. exim_tidydb, when checking for the continued existence of a message for
5818 which it has found a message-specific retry record, was not finding
5819 messages that were in split spool directories. Consequently, it was
5820 deleting retry records that should have stayed in existence.
5822 48. Steve fixed some bugs in eximstats.
5824 49. The SPA authentication driver was not abandoning authentication and moving
5825 on to the next authenticator when an expansion was forced to fail,
5826 contradicting the general specification for all authenticators. Instead it
5827 was generating a temporary error. It now behaves as specified.
5829 50. The default ordering of permitted cipher suites for GnuTLS was pessimal
5830 (the order specifies the preference for clients). The order is now AES256,
5831 AES128, 3DES, ARCFOUR128.
5833 51. Small patch to Sieve code - explicitly set From: when generating an
5836 52. Exim crashed if a remote delivery caused a very long error message to be
5837 recorded - for instance if somebody sent an entire SpamAssassin report back
5838 as a large number of 550 error lines. This bug was coincidentally fixed by
5839 increasing the size of one of Exim's internal buffers (big_buffer) that
5840 happened as part of the Exiscan merge. However, to be on the safe side, I
5841 have made the code more robust (and fixed the comments that describe what
5844 53. Now that there can be additional text after "Completed" in log lines (if
5845 the queue_time_overall log selector is set), a one-byte patch to exigrep
5846 was needed to allow it to recognize "Completed" as not the last thing in
5849 54. The LDAP lookup was not handling a return of LDAP_RES_SEARCH_REFERENCE. A
5850 patch that reportedly fixes this has been added. I am not expert enough to
5851 create a test for it. This is what the patch creator wrote:
5853 "I found a little strange behaviour of ldap code when working with
5854 Windows 2003 AD Domain, where users was placed in more than one
5855 Organization Units. When I tried to give exim partial DN, the exit code
5856 of ldap_search was unknown to exim because of LDAP_RES_SEARCH_REFERENCE.
5857 But simultaneously result of request was absolutely normal ldap result,
5858 so I produce this patch..."
5860 Later: it seems that not all versions of LDAP support LDAP_RES_SEARCH_
5861 REFERENCE, so I have modified the code to exclude the patch when that macro
5864 55. Some experimental protocols are using DNS PTR records for new purposes. The
5865 keys for these records are domain names, not reversed IP addresses. The
5866 dnsdb PTR lookup now tests whether its key is an IP address. If not, it
5867 leaves it alone. Component reversal etc. now happens only for IP addresses.
5870 56. Improve error message when ldap_search() fails in OpenLDAP or Solaris LDAP.
5872 57. Double the size of the debug message buffer (to 2048) so that more of very
5873 long debug lines gets shown.
5875 58. The exicyclog utility now does better if the number of log files to keep
5876 exceeds 99. In this case, it numbers them 001, 002 ... instead of 01, 02...
5878 59. Two changes related to the smtp_active_hostname option:
5880 (1) $smtp_active_hostname is now available as a variable.
5881 (2) The default for smtp_banner uses $smtp_active_hostname instead
5882 of $primary_hostname.
5884 60. The host_aton() function is supposed to be passed a string that is known
5885 to be a valid IP address. However, in the case of IPv6 addresses, it was
5886 not checking this. This is a hostage to fortune. Exim now panics and dies
5887 if the condition is not met. A case was found where this could be provoked
5888 from a dnsdb PTR lookup with an IPv6 address that had more than 8
5889 components; fortuitously, this particular loophole had already been fixed
5890 by change 4.50/55 above.
5892 If there are any other similar loopholes, the new check in host_aton()
5893 itself should stop them being exploited. The report I received stated that
5894 data on the command line could provoke the exploit when Exim was running as
5895 exim, but did not say which command line option was involved. All I could
5896 find was the use of -be with a bad dnsdb PTR lookup, and in that case it is
5897 running as the user.
5900 61. There was a buffer overflow vulnerability in the SPA authentication code
5901 (which came originally from the Samba project). I have added a test to the
5902 spa_base64_to_bits() function which I hope fixes it.
5905 62. Configuration update for GNU/Hurd and variations. Updated Makefile-GNU and
5906 os.h-GNU, and added configuration files for GNUkFreeBSD and GNUkNetBSD.
5908 63. The daemon start-up calls getloadavg() while still root for those OS that
5909 need the first call to be done as root, but it missed one case: when
5910 deliver_queue_load_max is set with deliver_drop_privilege. This is
5911 necessary for the benefit of the queue runner, because there is no re-exec
5912 when deliver_drop_privilege is set.
5914 64. A call to exiwhat cut short delays set up by "delay" modifiers in ACLs.
5915 This has been fixed.
5917 65. Caching of lookup data for "hosts =" ACL conditions, when a named host list
5918 was in use, was not putting the data itself into the right store pool;
5919 consequently, it could be overwritten for a subsequent message in the same
5920 SMTP connection. (Fix 4.40/11 dealt with the non-cache case, but overlooked
5923 66. Added hosts_max_try_hardlimit to the smtp transport, default 50.
5925 67. The string_is_ip_address() function returns 0, 4, or 6, for "no an IP
5926 address", "IPv4 address", and "IPv6 address", respectively. Some calls of
5927 the function were treating the return as a boolean value, which happened to
5928 work because 0=false and not-0=true, but is not correct code.
5930 68. The host_aton() function was not handling scoped IPv6 addresses (those
5931 with, for example, "%eth0" on the end) correctly.
5933 69. Fixed some compiler warnings in acl.c for the bitmaps specified with
5934 negated items (that is, ~something) in unsigned ints. Some compilers
5935 apparently mutter when there is no cast.
5937 70. If an address verification called from an ACL failed, and did not produce a
5938 user-specific message (i.e. there was only a "system" message), nothing was
5939 put in $acl_verify_message. In this situation, it now puts the system
5942 71. Change 4.23/11 added synchronization checking at the start of an SMTP
5943 session; change 4.31/43 added the unwanted input to the log line - except
5944 that it did not do this in the start of session case. It now does.
5946 72. After a timeout in a callout SMTP session, Exim still sent a QUIT command.
5947 This is wrong and can cause the other end to generate a synchronization
5948 error if it is another Exim or anything else that does the synchronization
5949 check. A QUIT command is no longer sent after a timeout.
5951 73. $host_lookup_deferred has been added, to make it easier to detect DEFERs
5952 during host lookups.
5954 74. The defer_ok option of callout verification was not working if it was used
5955 when verifying addresses in header lines, that is, for this case:
5957 verify = header_sender/callout=defer_ok
5959 75. A backgrounded daemon closed stdin/stdout/stderr on entry; this meant that
5960 those file descriptors could be used for SMTP connections. If anything
5961 wrote to stderr (the example that came up was "warn" in embedded Perl), it
5962 could be sent to the SMTP client, causing chaos. The daemon now opens
5963 stdin, stdout, and stderr to /dev/null when it puts itself into the
5966 76. Arrange for output from Perl's "warn" command to be written to Exim's main
5967 log by default. The user can override this with suitable Perl magic.
5969 77. The use of log_message on a "discard" ACL verb, which is supposed to add to
5970 the log message when discard triggers, was not working for the DATA ACL or
5971 for the non-SMTP ACL.
5973 78. Error message wording change in sieve.c.
5975 79. If smtp_accept_max_per_host was set, the number of connections could be
5976 restricted to fewer than expected, because the daemon was trying to set up
5977 a new connection before checking whether the processes handling previous
5978 connections had finished. The check for completed processes is now done
5979 earlier. On busy systems, this bug wouldn't be noticed because something
5980 else would have woken the daemon, and it would have reaped the completed
5983 80. If a message was submitted locally by a user whose login name contained one
5984 or more spaces (ugh!), the spool file that Exim wrote was not re-readable.
5985 It caused a spool format error. I have fixed the spool reading code. A
5986 related problem was that the "from" clause in the Received: line became
5987 illegal because of the space(s). It is now covered by ${quote_local_part.
5989 81. Included the latest eximstats from Steve (adds average sizes to HTML Top
5992 82. Updated OS/Makefile-AIX as per message from Mike Meredith.
5994 83. Patch from Sieve maintainer to fix unterminated string problem in
5995 "vacation" handling.
5997 84. Some minor changes to the Linux configuration files to help with other
5998 OS variants using glibc.
6000 85. One more patch for Sieve to update vacation handling to latest spec.
6003 ----------------------------------------------------
6004 See the note above about the 4.44 and 4.50 releases.
6005 ----------------------------------------------------
6011 1. Change 4.43/35 introduced a bug that caused file counts to be
6012 incorrectly computed when quota_filecount was set in an appendfile
6015 2. Closing a stable door: arrange to panic-die if setitimer() ever fails. The
6016 bug fixed in 4.43/37 would have been diagnosed quickly if this had been in
6019 3. Give more explanation in the error message when the command for a transport
6020 filter fails to execute.
6022 4. There are several places where Exim runs a non-Exim command in a
6023 subprocess. The SIGUSR1 signal should be disabled for these processes. This
6024 was being done only for the command run by the queryprogram router. It is
6025 now done for all such subprocesses. The other cases are: ${run, transport
6026 filters, and the commands run by the lmtp and pipe transports.
6028 5. Some older OS have a limit of 256 on the maximum number of file
6029 descriptors. Exim was using setrlimit() to set 1000 as a large value
6030 unlikely to be exceeded. Change 4.43/17 caused a lot of logging on these
6031 systems. I've change it so that if it can't get 1000, it tries for 256.
6033 6. "control=submission" was allowed, but had no effect, in a DATA ACL. This
6034 was an oversight, and furthermore, ever since the addition of extra
6035 controls (e.g. 4.43/32), the checks on when to allow different forms of
6036 "control" were broken. There should now be diagnostics for all cases when a
6037 control that does not make sense is encountered.
6039 7. $recipients is now available in the predata ACL (oversight).
6041 8. Tidy the search cache before the fork to do a delivery from a message
6042 received from the command line. Otherwise the child will trigger a lookup
6043 failure and thereby defer the delivery if it tries to use (for example) a
6044 cached ldap connection that the parent has called unbind on.
6046 9. If verify=recipient was followed by verify=sender in a RCPT ACL, the value
6047 of $address_data from the recipient verification was clobbered by the
6048 sender verification.
6050 10. If FIXED_NEVER_USERS was defined, but empty, Exim was assuming the uid 0
6051 was its contents. (It was OK if the option was not defined at all.)
6053 11. A "Completed" log line is now written for messages that are removed from
6054 the spool by the -Mrm option.
6056 12. $host_address is now set to the target address during the checking of
6057 ignore_target_hosts.
6059 13. When checking ignore_target_hosts for an ipliteral router, no host name was
6060 being passed; this would have caused $sender_host_name to have been used if
6061 matching the list had actually called for a host name (not very likely,
6062 since this list is usually IP addresses). A host name is now passed as
6065 14. Changed the calls that set up the SIGCHLD handler in the daemon to use the
6066 code that specifies a non-restarting handler (typically sigaction() in
6067 modern systems) in an attempt to fix a rare and obscure crash bug.
6069 15. Narrowed the window for a race in the daemon that could cause it to ignore
6070 SIGCHLD signals. This is not a major problem, because they are used only to
6071 wake it up if nothing else does.
6073 16. A malformed maildirsize file could cause Exim to calculate negative values
6074 for the mailbox size or file count. Odd effects could occur as a result.
6075 The maildirsize information is now recalculated if the size or filecount
6078 17. Added HAVE_SYS_STATVFS_H to the os.h file for Linux, as it has had this
6079 support for a long time. Removed HAVE_SYS_VFS_H.
6081 18. Updated exipick to current release from John Jetmore.
6083 19. Allow an empty sender to be matched against a lookup in an address list.
6084 Previously the only cases considered were a regular expression, or an
6087 20. Exim went into a mad DNS lookup loop when doing a callout where the
6088 host was specified on the transport, if the DNS lookup yielded more than
6091 21. The RFC2047 encoding function was originally intended for short strings
6092 such as real names; it was not keeping to the 75-character limit for
6093 encoded words that the RFC imposes. It now respects the limit, and
6094 generates multiple encoded words if necessary. To be on the safe side, I
6095 have increased the buffer size for the ${rfc2047: expansion operator from
6098 22. Failure to deliver a bounce message always caused it to be frozen, even if
6099 there was an errors_to setting on the router. The errors_to setting is now
6102 23. If an IPv6 address is given for -bh or -bhc, it is now converted to the
6103 canonical form (fully expanded) before being placed in
6104 $sender_host_address.
6106 24. Updated eximstats to version 1.33
6108 25. Include certificate and key file names in error message when GnuTLS fails
6109 to set them up, because the GnuTLS error message doesn't include the name
6110 of the failing file when there is a problem reading it.
6112 26. Expand error message when OpenSSL has problems setting up cert/key files.
6115 27. Reset the locale to "C" after calling embedded Perl, in case it was changed
6116 (this can affect the format of dates).
6118 28. exim_tidydb, when checking for the continued existence of a message for
6119 which it has found a message-specific retry record, was not finding
6120 messages that were in split spool directories. Consequently, it was
6121 deleting retry records that should have stayed in existence.
6123 29. eximstats updated to version 1.35
6124 1.34 - allow eximstats to parse syslog lines as well as mainlog lines
6125 1.35 - bugfix such that pie charts by volume are generated correctly
6127 30. The SPA authentication driver was not abandoning authentication and moving
6128 on to the next authenticator when an expansion was forced to fail,
6129 contradicting the general specification for all authenticators. Instead it
6130 was generating a temporary error. It now behaves as specified.
6132 31. The default ordering of permitted cipher suites for GnuTLS was pessimal
6133 (the order specifies the preference for clients). The order is now AES256,
6134 AES128, 3DES, ARCFOUR128.
6136 31. Small patch to Sieve code - explicitly set From: when generating an
6139 32. Exim crashed if a remote delivery caused a very long error message to be
6140 recorded - for instance if somebody sent an entire SpamAssassin report back
6141 as a large number of 550 error lines. This bug was coincidentally fixed by
6142 increasing the size of one of Exim's internal buffers (big_buffer) that
6143 happened as part of the Exiscan merge. However, to be on the safe side, I
6144 have made the code more robust (and fixed the comments that describe what
6147 33. Some experimental protocols are using DNS PTR records for new purposes. The
6148 keys for these records are domain names, not reversed IP addresses. The
6149 dnsdb PTR lookup now tests whether its key is an IP address. If not, it
6150 leaves it alone. Component reversal etc. now happens only for IP addresses.
6153 34. The host_aton() function is supposed to be passed a string that is known
6154 to be a valid IP address. However, in the case of IPv6 addresses, it was
6155 not checking this. This is a hostage to fortune. Exim now panics and dies
6156 if the condition is not met. A case was found where this could be provoked
6157 from a dnsdb PTR lookup with an IPv6 address that had more than 8
6158 components; fortuitously, this particular loophole had already been fixed
6159 by change 4.50/55 or 4.44/33 above.
6161 If there are any other similar loopholes, the new check in host_aton()
6162 itself should stop them being exploited. The report I received stated that
6163 data on the command line could provoke the exploit when Exim was running as
6164 exim, but did not say which command line option was involved. All I could
6165 find was the use of -be with a bad dnsdb PTR lookup, and in that case it is
6166 running as the user.
6169 35. There was a buffer overflow vulnerability in the SPA authentication code
6170 (which came originally from the Samba project). I have added a test to the
6171 spa_base64_to_bits() function which I hope fixes it.
6174 36. The daemon start-up calls getloadavg() while still root for those OS that
6175 need the first call to be done as root, but it missed one case: when
6176 deliver_queue_load_max is set with deliver_drop_privilege. This is
6177 necessary for the benefit of the queue runner, because there is no re-exec
6178 when deliver_drop_privilege is set.
6180 37. Caching of lookup data for "hosts =" ACL conditions, when a named host list
6181 was in use, was not putting the data itself into the right store pool;
6182 consequently, it could be overwritten for a subsequent message in the same
6183 SMTP connection. (Fix 4.40/11 dealt with the non-cache case, but overlooked
6186 38. Sometimes the final signoff response after QUIT could fail to get
6187 transmitted in the non-TLS case. Testing !tls_active instead of tls_active
6188 < 0 before doing a fflush(). This bug looks as though it goes back to the
6189 introduction of TLS in release 3.20, but "sometimes" must have been rare
6190 because the tests only now provoked it.
6196 1. Fixed a longstanding but relatively impotent bug: a long time ago, before
6197 PIPELINING, the function smtp_write_command() used to return TRUE or FALSE.
6198 Now it returns an integer. A number of calls were still expecting a T/F
6199 return. Fortuitously, in all cases, the tests worked in OK situations,
6200 which is the norm. However, things would have gone wrong on any write
6201 failures on the smtp file descriptor. This function is used when sending
6202 messages over SMTP and also when doing verify callouts.
6204 2. When Exim is called to do synchronous delivery of a locally submitted
6205 message (the -odf or -odi options), it no longer closes stderr before doing
6208 3. Implemented the mua_wrapper option.
6210 4. Implemented mx_fail_domains and srv_fail_domains for the dnslookup router.
6212 5. Implemented the functions header_remove(), header_testname(),
6213 header_add_at_position(), and receive_remove_recipient(), and exported them
6216 6. If an ACL "warn" statement specified the addition of headers, Exim already
6217 inserted X-ACL-Warn: at the start if there was no header name. However, it
6218 was not making this test for the second and subsequent header lines if
6219 there were newlines in the string. This meant that an invalid header could
6220 be inserted if Exim was badly configured.
6222 7. Allow an ACL "warn" statement to add header lines at the start or after all
6223 the Received: headers, as well as at the end.
6225 8. Added the rcpt_4xx retry error code.
6227 9. Added postmaster_mailfrom=xxx to callout verification option.
6229 10. Added mailfrom=xxxx to the callout verification option, for verify=
6232 11. ${substr_1_:xxxx} and ${substr__3:xxxx} are now diagnosed as syntax errors
6233 (they previously behaved as ${substr_1_0:xxxx} and ${substr:_0_3:xxxx}).
6235 12. Inserted some casts to stop certain compilers warning when using pointer
6236 differences as field lengths or precisions in printf-type calls (mostly
6237 affecting debugging statements).
6239 13. Added optional readline() support for -be (dynamically loaded).
6241 14. Obscure bug fix: if a message error (e.g. 4xx to MAIL) happened within the
6242 same clock tick as a message's arrival, so that its received time was the
6243 same as the "first fail" time on the retry record, and that message
6244 remained on the queue past the ultimate address timeout, every queue runner
6245 would try a delivery (because it was past the ultimate address timeout) but
6246 after another failure, the ultimate address timeout, which should have then
6247 bounced the address, did not kick in. This was a "< instead of <=" error;
6248 in most cases the first failure would have been in the next clock tick
6249 after the received time, and all would be well.
6251 15. The special items beginning with @ in domain lists (e.g. @mx_any) were not
6252 being recognized when the domain list was tested by the match_domain
6253 condition in an expansion string.
6255 16. Added the ${str2b64: operator.
6257 17. Exim was always calling setrlimit() to set a large limit for the number of
6258 processes, without checking whether the existing limit was already
6259 adequate. (It did check for the limit on file descriptors.) Furthermore,
6260 errors from getrlimit() and setrlimit() were being ignored. Now they are
6261 logged to the main and panic logs, but Exim does carry on, to try to do its
6262 job under whatever limits there are.
6264 18. Imported PCRE 5.0.
6266 19. Trivial typo in log message " temporarily refused connection" (the leading
6269 20. If the log selector return_path_on_delivery was set and an address was
6270 redirected to /dev/null, the delivery process crashed because it assumed
6271 that a return path would always be set for a "successful" delivery. In this
6272 case, the whole delivery is bypassed as an optimization, and therefore no
6275 21. Internal re-arrangement: the function for sending a challenge and reading
6276 a response while authentication was assuming a zero-terminated challenge
6277 string. It's now changed to take a pointer and a length, to allow for
6278 binary data in such strings.
6280 22. Added the cyrus_sasl authenticator (code supplied by MBM).
6282 23. Exim was not respecting finduser_retries when seeking the login of the
6283 uid under which it was called; it was always trying 10 times. (The default
6284 setting of finduser_retries is zero.) Also, it was sleeping after the final
6285 failure, which is pointless.
6287 24. Implemented tls_on_connect_ports.
6289 25. Implemented acl_smtp_predata.
6291 26. If the domain in control=submission is set empty, Exim assumes that the
6292 authenticated id is a complete email address when it generates From: or
6293 Sender: header lines.
6295 27. Added "#define SOCKLEN_T int" to OS/os.h-SCO and OS/os.h-SCO_SV. Also added
6296 definitions to OS/Makefile-SCO and OS/Makefile-SCO_SV that put basename,
6297 chown and chgrp in /bin and hostname in /usr/bin.
6299 28. Exim was keeping the "process log" file open after each use, just as it
6300 does for the main log. This opens the possibility of it remaining open for
6301 long periods when the USR1 signal hits a daemon. Occasional processlog
6302 errors were reported, that could have been caused by this. Anyway, it seems
6303 much more sensible not to leave this file open at all, so that is what now
6306 29. The long-running daemon process does not normally write to the log once it
6307 has entered its main loop, and it closes the log before doing so. This is
6308 so that log files can straightforwardly be renamed and moved. However,
6309 there are a couple of unusual error situations where the daemon does write
6310 log entries, and I had neglected to close the log afterwards.
6312 30. The text of an SMTP error response that was received during a remote
6313 delivery was being truncated at 512 bytes. This is too short for some of
6314 the long messages that one sometimes sees. I've increased the limit to
6317 31. It is now possible to make retry rules that apply only when a message has a
6318 specific sender, in particular, an empty sender.
6320 32. Added "control = enforce_sync" and "control = no_enforce_sync". This makes
6321 it possible to be selective about when SMTP synchronization is enforced.
6323 33. Added "control = caseful_local_part" and "control = "caselower_local_part".
6325 32. Implemented hosts_connection_nolog.
6327 33. Added an ACL for QUIT.
6329 34. Setting "delay_warning=" to disable warnings was not working; it gave a
6332 35. Added mailbox_size and mailbox_filecount to appendfile.
6334 36. Added control = no_multiline_responses to ACLs.
6336 37. There was a bug in the logic of the code that waits for the clock to tick
6337 in the case where the clock went backwards by a substantial amount such
6338 that the microsecond fraction of "now" was more than the microsecond
6339 fraction of "then" (but the whole seconds number was less).
6341 38. Added support for the libradius Radius client library this is found on
6342 FreeBSD (previously only the radiusclient library was supported).
6348 1. When certain lookups returned multiple values in the form name=value, the
6349 quoting of the values was not always being done properly. Specifically:
6350 (a) If the value started with a double quote, but contained no whitespace,
6352 (b) If the value contained whitespace other than a space character (i.e.
6353 tabs or newlines or carriage returns) it was not quoted.
6354 This fix has been applied to the mysql and pgsql lookups by writing a
6355 separate quoting function and calling it from the lookup code. The fix
6356 should probably also be applied to nisplus, ibase and oracle lookups, but
6357 since I cannot test any of those, I have not disturbed their existing code.
6359 2. A hit in the callout cache for a specific address caused a log line with no
6360 reason for rejecting RCPT. Now it says "Previous (cached) callout
6361 verification failure".
6363 3. There was an off-by-one bug in the queryprogram router. An over-long
6364 return line was truncated at 256 instead of 255 characters, thereby
6365 overflowing its buffer with the terminating zero. As well as fixing this, I
6366 have increased the buffer size to 1024 (and made a note to document this).
6368 4. If an interrupt, such as the USR1 signal that is send by exiwhat, arrives
6369 when Exim is waiting for an SMTP response from a remote server, Exim
6370 restarts its select() call on the socket, thereby resetting its timeout.
6371 This is not a problem when such interrupts are rare. Somebody set up a cron
6372 job to run exiwhat every 2 minutes, which is less than the normal select()
6373 timeout (5 or 10 minutes). This meant that the select() timeout never
6374 kicked in because it was always reset. I have fixed this by comparing the
6375 time when an interrupt arrives with the time at the start of the first call
6376 to select(). If more time than the timeout has elapsed, the interrupt is
6377 treated as a timeout.
6379 5. Some internal re-factoring in preparation for the addition of Sieve
6380 extensions (by MH). In particular, the "personal" test is moved to a
6381 separate function, and given an option for scanning Cc: and Bcc: (which is
6382 not set for Exim filters).
6384 6. When Exim created an email address using the login of the caller as the
6385 local part (e.g. when creating a From: or Sender: header line), it was not
6386 quoting the local part when it contained special characters such as @.
6388 7. Installed new OpenBSD configuration files.
6390 8. Reworded some messages for syntax errors in "and" and "or" conditions to
6391 try to make them clearer.
6393 9. Callout options, other than the timeout value, were being ignored when
6394 verifying sender addresses in header lines. For example, when using
6396 verify = header_sender/callout=no_cache
6398 the cache was (incorrectly) being used.
6400 10. Added a missing instance of ${EXE} to the exim_install script; this affects
6401 only the Cygwin environment.
6403 11. When return_path_on_delivery was set as a log selector, if different remote
6404 addresses in the same message used different return paths and parallel
6405 remote delivery occurred, the wrong values would sometimes be logged.
6406 (Whenever a remote delivery process finished, the return path value from
6407 the most recently started remote delivery process was logged.)
6409 12. RFC 3848 specifies standard names for the "with" phrase in Received: header
6410 lines when AUTH and/or TLS are in use. This is the "received protocol"
6411 field. Exim used to use "asmtp" for authenticated SMTP, without any
6412 indication (in the protocol name) for TLS use. Now it follows the RFC and
6413 uses "esmtpa" if the connection is authenticated, "esmtps" if it is
6414 encrypted, and "esmtpsa" if it is both encrypted and authenticated. These
6415 names appear in log lines as well as in Received: header lines.
6417 13. Installed MH's patches for Sieve to add the "copy" and "vacation"
6418 extensions, and comparison tests, and to fix some bugs.
6420 14. Changes to the "personal" filter test:
6422 (1) The test was buggy in that it was just doing the equivalent of
6423 "contains" tests on header lines. For example, if a user's address was
6424 anne@some.where, the "personal" test would incorrectly be true for
6426 To: susanne@some.where
6428 This test is now done by extracting each address from the header in turn,
6429 and checking the entire address. Other tests that are part of "personal"
6430 are now done using regular expressions (for example, to check local parts
6431 of addresses in From: header lines).
6433 (2) The list of non-personal local parts in From: addresses has been
6434 extended to include "listserv", "majordomo", "*-request", and "owner-*",
6435 taken from the Sieve specification recommendations.
6437 (3) If the message contains any header line starting with "List-" it is
6438 treated as non-personal.
6440 (4) The test for "circular" in the Subject: header line has been removed
6441 because it now seems ill-conceived.
6443 15. Minor typos in src/EDITME comments corrected.
6445 16. Installed latest exipick from John Jetmore.
6447 17. If headers_add on a router specified a text string that was too long for
6448 string_sprintf() - that is, longer than 8192 bytes - Exim panicked. The use
6449 of string_sprintf() is now avoided.
6451 18. $message_body_size was not set (it was always zero) when running the DATA
6452 ACL and the local_scan() function.
6454 19. For the "mail" command in an Exim filter, no default was being set for
6455 the once_repeat time, causing a random time value to be used if "once" was
6456 specified. (If the value happened to be <= 0, no repeat happened.) The
6457 default is now 0s, meaning "never repeat". The "vacation" command was OK
6458 (its default is 7d). It's somewhat surprising nobody ever noticed this bug
6459 (I found it when inspecting the code).
6461 20. There is now an overall timeout for performing a callout verification. It
6462 defaults to 4 times the callout timeout, which applies to individual SMTP
6463 commands during the callout. The overall timeout applies when there is more
6464 than one host that can be tried. The timeout is checked before trying the
6465 next host. This prevents very long delays if there are a large number of
6466 hosts and all are timing out (e.g. when the network connections are timing
6467 out). The value of the overall timeout can be changed by specifying an
6468 additional sub-option for "callout", called "maxwait". For example:
6470 verify = sender/callout=5s,maxwait=20s
6472 21. Add O_APPEND to the open() call for maildirsize files (Exim already seeks
6473 to the end before writing, but this should make it even safer).
6475 22. Exim was forgetting that it had advertised PIPELINING for the second and
6476 subsequent messages on an SMTP connection. It was also not resetting its
6477 memory on STARTTLS and an internal HELO.
6479 23. When Exim logs an SMTP synchronization error within a session, it now
6480 records whether PIPELINING has been advertised or not.
6482 24. Added 3 instances of "(long int)" casts to time_t variables that were being
6483 formatted using %ld, because on OpenBSD (and perhaps others), time_t is int
6484 rather than long int.
6486 25. Installed the latest Cygwin configuration files from the Cygwin maintainer.
6488 26. Added the never_mail option to autoreply.
6494 1. A reorganization of the code in order to implement 4.40/8 caused a daemon
6495 crash if the getsockname() call failed; this can happen if a connection is
6496 closed very soon after it is established. The problem was simply in the
6497 order in which certain operations were done, causing Exim to try to write
6498 to the SMTP stream before it had set up the file descriptor. The bug has
6499 been fixed by making things happen in the correct order.
6505 1. If "drop" was used in a DATA ACL, the SMTP output buffer was not flushed
6506 before the connection was closed, thus losing the rejection response.
6508 2. Commented out the definition of SOCKLEN_T in os.h-SunOS5. It is needed for
6509 some early Solaris releases, but causes trouble in current releases where
6510 socklen_t is defined.
6512 3. When std{in,out,err} are closed, re-open them to /dev/null so that they
6515 4. Minor refactoring of os.c-Linux to avoid compiler warning when IPv6 is not
6518 5. Refactoring in expand.c to improve memory usage. Pre-allocate a block so
6519 that releasing the top of it at the end releases what was used for sub-
6520 expansions (unless the block got too big). However, discard this block if
6521 the first thing is a variable or header, so that we can use its block when
6522 it is dynamic (useful for very large $message_headers, for example).
6524 6. Lookups now cache *every* query, not just the most recent. A new, separate
6525 store pool is used for this. It can be recovered when all lookup caches are
6526 flushed. Lookups now release memory at the end of their result strings.
6527 This has involved some general refactoring of the lookup sources.
6529 7. Some code has been added to the store_xxx() functions to reduce the amount
6530 of flapping under certain conditions.
6532 8. log_incoming_interface used to affect only the <= reception log lines. Now
6533 it causes the local interface and port to be added to several more SMTP log
6534 lines, for example "SMTP connection from", and rejection lines.
6536 9. The Sieve author supplied some patches for the doc/README.SIEVE file.
6538 10. Added a conditional definition of _BSD_SOCKLEN_T to os.h-Darwin.
6540 11. If $host_data was set by virtue of a hosts lookup in an ACL, its value
6541 could be overwritten at the end of the current message (or the start of a
6542 new message if it was set in a HELO ACL). The value is now preserved for
6543 the duration of the SMTP connection.
6545 12. If a transport had a headers_rewrite setting, and a matching header line
6546 contained an unqualified address, that address was qualified, even if it
6547 did not match any rewriting rules. The underlying bug was that the values
6548 of the flags that permit the existence of unqualified sender and recipient
6549 addresses in header lines (set by {sender,recipient}_unqualified_hosts for
6550 non-local messages, and by -bnq for local messages) were not being
6551 preserved with the message after it was received.
6553 13. When Exim was logging an SMTP synchronization error, it could sometimes log
6554 "next input=" as part of the text comprising the host identity instead of
6555 the correct text. The code was using the same buffer for two different
6556 strings. However, depending on which order the printing function evaluated
6557 its arguments, the bug did not always show up. Under Linux, for example, my
6558 test suite worked just fine.
6560 14. Exigrep contained a use of Perl's "our" scoping after change 4.31/70. This
6561 doesn't work with some older versions of Perl. It has been changed to "my",
6562 which in any case is probably the better facility to use.
6564 15. A really picky compiler found some instances of statements for creating
6565 error messages that either had too many or two few arguments for the format
6568 16. The size of the buffer for calls to the DNS resolver has been increased
6569 from 1024 to 2048. A larger buffer is needed when performing PTR lookups
6570 for addresses that have a lot of PTR records. This alleviates a problem; it
6571 does not fully solve it.
6573 17. A dnsdb lookup for PTR records that receives more data than will fit in the
6574 buffer now truncates the list and logs the incident, which is the same
6575 action as happens when Exim is looking up a host name and its aliases.
6576 Previously in this situation something unpredictable would happen;
6577 sometimes it was "internal error: store_reset failed".
6579 18. If a server dropped the connection unexpectedly when an Exim client was
6580 using GnuTLS and trying to read a response, the client delivery process
6581 crashed while trying to generate an error log message.
6583 19. If a "warn" verb in an ACL added multiple headers to a message in a single
6584 string, for example:
6586 warn message = H1: something\nH2: something
6588 the text was added as a single header line from Exim's point of view
6589 though it ended up OK in the delivered message. However, searching for the
6590 second and subsequent header lines using $h_h2: did not work. This has been
6591 fixed. Similarly, if a system filter added multiple headers in this way,
6592 the routers could not see them.
6594 20. Expanded the error message when iplsearch is called with an invalid key to
6595 suggest using net-iplsearch in a host list.
6597 21. When running tests using -bh, any delays imposed by "delay" modifiers in
6598 ACLs are no longer actually imposed (and a message to that effect is
6601 22. If a "gecos" field in a passwd entry contained escaped characters, in
6602 particular, if it contained a \" sequence, Exim got it wrong when building
6603 a From: or a Sender: header from that name. A second bug also caused
6604 incorrect handling when an unquoted " was present following a character
6605 that needed quoting.
6607 23. "{crypt}" as a password encryption mechanism for a "crypteq" expansion item
6608 was not being matched caselessly.
6610 24. Arranged for all hyphens in the exim.8 source to be escaped with
6613 25. Change 16 of 4.32, which reversed 71 or 4.31 didn't quite do the job
6614 properly. Recipient callout cache records were still being keyed to include
6615 the sender, even when use_sender was set false. This led to far more
6616 callouts that were necessary. The sender is no longer included in the key
6617 when use_sender is false.
6619 26. Added "control = submission" modifier to ACLs.
6621 27. Added the ${base62d: operator to decode base 62 numbers.
6623 28. dnsdb lookups can now access SRV records.
6625 29. CONFIGURE_OWNER can be set at build time to define an alternative owner for
6626 the configuration file.
6628 30. The debug message "delivering xxxxxx-xxxxxx-xx" is now output in verbose
6629 (-v) mode. This makes the output for a verbose queue run more intelligible.
6631 31. Added a use_postmaster feature to recipient callouts.
6633 32. Added the $body_zerocount variable, containing the number of binary zero
6634 bytes in the message body.
6636 33. The time of last modification of the "new" subdirectory is now used as the
6637 "mailbox time last read" when there is a quota error for a maildir
6640 34. Added string comparison operators lt, lti, le, lei, gt, gti, ge, gei.
6642 35. Added +ignore_unknown as a special item in host lists.
6644 36. Code for decoding IPv6 addresses in host lists is now included, even if
6645 IPv6 support is not being compiled. This fixes a bug in which an IPv6
6646 address was recognized as an IP address, but was then not correctly decoded
6647 into binary, causing unexpected and incorrect effects when compared with
6654 1. Very minor rewording of debugging text in manualroute to say "list of
6655 hosts" instead of "hostlist".
6657 2. If verify=header_syntax was set, and a header line with an unqualified
6658 address (no domain) and a large number of spaces between the end of the
6659 name and the colon was received, the reception process suffered a buffer
6660 overflow, and (when I tested it) crashed. This was caused by some obsolete
6661 code that should have been removed. The fix is to remove it!
6663 3. When running in the test harness, delay a bit after writing a bounce
6664 message to get a bit more predictability in the log output.
6666 4. Added a call to search_tidyup() just before forking a reception process. In
6667 theory, someone could use a lookup in the expansion of smtp_accept_max_
6668 per_host which, without the tidyup, could leave open a database connection.
6670 5. Added the variables $recipient_data and $sender_data which get set from a
6671 lookup success in an ACL "recipients" or "senders" condition, or a router
6672 "senders" option, similar to $domain_data and $local_part_data.
6674 6. Moved the writing of debug_print from before to after the "senders" test
6677 7. Change 4.31/66 (moving the time when the Received: is generated) caused
6678 problems for message scanning, either using a data ACL, or using
6679 local_scan() because the Received: header was not generated till after they
6680 were called (in order to set the time as the time of reception completion).
6681 I have revised the way this works. The header is now generated after the
6682 body is received, but before the ACL or local_scan() are called. After they
6683 are run, the timestamp in the header is updated.
6689 1. Change 4.24/6 introduced a bug because the SIGALRM handler was disabled
6690 before starting a queue runner without re-exec. This happened only when
6691 deliver_drop_privilege was set or when the Exim user was set to root. The
6692 effect of the bug was that timeouts during subsequent deliveries caused
6693 crashes instead of being properly handled. The handler is now left at its
6694 default (and expected) setting.
6696 2. The other case in which a daemon avoids a re-exec is to deliver an incoming
6697 message, again when deliver_drop_privilege is set or Exim is run as root.
6698 The bug described in (1) was not present in this case, but the tidying up
6699 of the other signals was missing. I have made the two cases consistent.
6701 3. The ignore_target_hosts setting on a manualroute router was being ignored
6702 for hosts that were looked up using the /MX notation.
6704 4. Added /ignore=<ip list> feature to @mx_any, @mx_primary, and @mx_secondary
6707 5. Change 4.31/55 was buggy, and broke when there was a rewriting rule that
6708 operated on the sender address. After changing the $sender_address to <>
6709 for the sender address verify, Exim was re-instated it as the original
6710 (before rewriting) address, but remembering that it had rewritten it, so it
6711 wasn't rewriting it again. This bug also had the effect of breaking the
6712 sender address verification caching when the sender address was rewritten.
6714 6. The ignore_target_hosts option was being ignored by the ipliteral router.
6715 This has been changed so that if the ip literal address matches
6716 ignore_target_hosts, the router declines.
6718 7. Added expansion conditions match_domain, match_address, and match_local_
6719 part (NOT match_host).
6721 8. The placeholder for the Received: header didn't have a length field set.
6723 9. Added code to Exim itself and to exim_lock to test for a specific race
6724 condition that could lead to file corruption when using MBX delivery. The
6725 issue is with the lockfile that is created in /tmp. If this file is removed
6726 after a process has opened it but before that process has acquired a lock,
6727 there is the potential for a second process to recreate the file and also
6728 acquire a lock. This could lead to two Exim processes writing to the file
6729 at the same time. The added code performs the same test as UW imapd; it
6730 checks after acquiring the lock that its file descriptor still refers to
6731 the same named file.
6733 10. The buffer for building added header lines was of fixed size, 8192 bytes.
6734 It is now parameterized by HEADER_ADD_BUFFER_SIZE and this can be adjusted
6737 11. Added the smtp_active_hostname option. If used, this will typically be made
6738 to depend on the incoming interface address. Because $interface_address is
6739 not set up until the daemon has forked a reception process, error responses
6740 that can happen earlier (such as "too many connections") no longer contain
6743 12. If an expansion in a condition on a "warn" statement fails because a lookup
6744 defers, the "warn" statement is abandoned, and the next ACL statement is
6745 processed. Previously this caused the whole ACL to be aborted.
6747 13. Added the iplsearch lookup type.
6749 14. Added ident_timeout as a log selector.
6751 15. Added tls_certificate_verified as a log selector.
6753 16. Added a global option tls_require_ciphers (compare the smtp transport
6754 option of the same name). This controls incoming TLS connections.
6756 17. I finally figured out how to make tls_require_ciphers do a similar thing
6757 in GNUtls to what it does in OpenSSL, that is, set up an appropriate list
6758 before starting the TLS session.
6760 18. Tabs are now shown as \t in -bP output.
6762 19. If the log selector return_path_on_delivery was set, Exim crashed when
6763 bouncing a message because it had too many Received: header lines.
6765 20. If two routers both had headers_remove settings, and the first one included
6766 a superfluous trailing colon, the final name in the first list and the
6767 first name in the second list were incorrectly joined into one item (with a
6768 colon in the middle).
6774 1. Added -C and -D options to the exinext utility, mainly to make it easier
6775 to include in the automated testing, but these could be helpful when
6776 multiple configurations are in use.
6778 2. The exinext utility was not formatting the output nicely when there was
6779 an alternate port involved in the retry record key, nor when there was a
6780 message id as well (for retries that were specific to a specific message
6781 and a specific host). It was also confused by IPv6 addresses, because of
6782 the additional colons they contain. I have fixed the IPv4 problem, and
6783 patched it up to do a reasonable job for IPv6.
6785 3. When there is an error after a MAIL, RCPT, or DATA SMTP command during
6786 delivery, the log line now contains "pipelined" if PIPELINING was used.
6788 4. An SMTP transport process used to panic and die if the bind() call to set
6789 an explicit outgoing interface failed. This has been changed; it is now
6790 treated in the same way as a connect() failure.
6792 5. A reference to $sender_host_name in the part of a conditional expansion
6793 that was being skipped was still causing a DNS lookup. This no longer
6796 6. The def: expansion condition was not recognizing references to header lines
6797 that used bh_ and bheader_.
6799 7. Added the _cache feature to named lists.
6801 8. The code for checking quota_filecount in the appendfile transport was
6802 allowing one more file than it should have been.
6804 9. For compatibility with Sendmail, the command line option
6812 and sets the incoming protocol and host name (for trusted callers). The
6813 host name and its colon can be omitted when only the protocol is to be set.
6814 Note the Exim already has two private options, -pd and -ps, that refer to
6815 embedded Perl. It is therefore impossible to set a protocol value of "d" or
6816 "s", but I don't think that's a major issue.
6818 10. A number of refactoring changes to the code, none of which should affect
6821 (a) The number of logging options was getting close to filling up the
6822 32-bit word that was used as a bit map. I have split them into two classes:
6823 those that are passed in the argument to log_write(), and those that are
6824 only ever tested independently outside of that function. These are now in
6825 separate 32-bit words, so there is plenty of room for expansion again.
6826 There is no change in the user interface or the logging behaviour.
6828 (b) When building, for example, log lines, the code previously used a
6829 macro that called string_cat() twice, in order to add two strings. This is
6830 not really sufficiently general. Furthermore, there was one instance where
6831 it was actually wrong because one of the argument was used twice, and in
6832 one call a function was used. (As it happened, calling the function twice
6833 did not affect the overall behaviour.) The macro has been replaced by a
6834 function that can join an arbitrary number of extra strings onto a growing
6837 (c) The code for expansion conditions now uses a table and a binary chop
6838 instead of a serial search (which was left over from when there were very
6839 few conditions). Also, it now recognizes conditions like "pam" even when
6840 the relevant support is not compiled in: a suitably worded error message is
6841 given if an attempt is made to use such a condition.
6843 11. Added ${time_interval:xxxxx}.
6845 12. A bug was causing one of the ddress fields not to be passed back correctly
6846 from remote delivery subprocesses. The field in question was not being
6847 subsequently used, so this caused to problems in practice.
6849 13. Added new log selectors queue_time and deliver_time.
6851 14. Might have fixed a bug in maildirsizefile handling that threw up
6852 "unexpected character" debug warnings, and recalculated the data
6853 unnecessarily. In any case, I expanded the warning message to give more
6856 15. Added the message "Restricted characters in address" to the statements in
6857 the default ACL that block characters like @ and % in local parts.
6859 16. Change 71 for release 4.31 proved to be much less benign that I imagined.
6860 Three changes have been made:
6862 (a) There was a serious bug; a negative response to MAIL caused the whole
6863 recipient domain to be cached as invalid, thereby blocking all messages
6864 to all local parts at the same domain, from all senders. This bug has
6865 been fixed. The domain is no longer cached after a negative response to
6866 MAIL if the sender used is not empty.
6868 (b) The default behaviour of using MAIL FROM:<> for recipient callouts has
6871 (c) A new callout option, "use_sender" has been added for people who want
6872 the modified behaviour.
6878 1. Removed "EXTRALIBS=-lwrap" from OS/Makefile-Unixware7 on the advice of
6881 2. Removed "LIBS = -lresolv" from OS/Makefile-Darwin as it is not needed, and
6882 indeed breaks things for older releases.
6884 3. Added additional logging to the case where there is a problem reading data
6885 from a filter that is running in a subprocess using a pipe, in order to
6886 try to track down a specific problem.
6888 4. Testing facility fudge: when running in the test harness and attempting
6889 to connect to 10.x.x.x (expecting a connection timeout) I'm now sometimes
6890 getting "No route to host". Convert this to a timeout.
6892 5. Define ICONV_ARG2_TYPE as "char **" for Unixware7 to avoid compiler
6895 6. Some OS don't have socklen_t but use size_t instead. This affects the
6896 fifth argument of getsockopt() amongst other things. This is now
6897 configurable by a macro called SOCKLEN_T which defaults to socklen_t, but
6898 can be set for individual OS. I have set it for SunOS5, OSF1, and
6899 Unixware7. Current versions of SunOS5 (aka Solaris) do have socklen_t, but
6900 some earlier ones do not.
6902 7. Change 4.30/15 was not doing the test caselessly.
6904 8. The standard form for an IPv6 address literal was being rejected by address
6905 parsing in, for example, MAIL and RCPT commands. An example of this kind of
6906 address is [IPv6:2002:c1ed:8229:10:202:2dff:fe07:a42a]. Exim now accepts
6907 this, as well as the form without the "IPv6" on the front (but only when
6908 address literals are enabled, of course).
6910 9. Added some casts to avoid compiler warnings in OS/os.c-Linux.
6912 10. Exim crashed if a message with an empty sender address specified by -f
6913 encountered a router with an errors_to setting. This could be provoked only
6914 by a command such as
6918 where an empty string was supplied; "<>" did not hit this bug.
6920 11. Installed PCRE release 4.5.
6922 12. If EHLO/HELO was rejected by an ACL, the value of $sender_helo_name
6923 remained set. It is now erased.
6925 13. exiqgrep wasn't working on MacOS X because it didn't correctly compute
6926 times from message ids (which are base 36 rather than the normal 62).
6928 14. "Expected" SMTP protocol errors that can arise when PIPELINING is in use
6929 were being counted as actual protocol errors, and logged if the log
6930 selector +smtp_protocol_error was set. One cannot be perfect in this test,
6931 but now, if PIPELINING has been advertised, RCPT following a rejected MAIL,
6932 and DATA following a set of rejected RCPTs do not count as protocol errors.
6933 In other words, Exim assumes they were pipelined, though this may not
6934 actually be the case. Of course, in all cases the client gets an
6935 appropriate error code.
6937 15. If a lookup fails in an ACL condition, a message about the failure may
6938 be available; it is used if testing the ACL cannot continue, because most
6939 such messages specify what the cause of the deferral is. However, some
6940 messages (e.g. "MYSQL: no data found") do not cause a defer. There was bug
6941 that caused an old message to be retained and used if a later statement
6942 caused a defer, replacing the real cause of the deferral.
6944 16. If an IP address had so many PTR records that the DNS lookup buffer
6945 was not large enough to hold them, Exim could crash while trying to process
6946 the truncated data. It now detects and logs this case.
6948 17. Further to 4.21/58, another change has been made: if (and only if) the
6949 first line of a message (the first header line) ends with CRLF, a bare LF
6950 in a subsequent header line has a space inserted after it, so as not to
6951 terminate the header.
6953 18. Refactoring: tidied an ugly bit of code in appendfile that copied data
6954 unnecessarily, used atoi() instead of strtol(), and didn't check the
6955 termination when getting file sizes from file names by regex.
6957 19. Completely re-implemented the support for maildirsize files, in the light
6958 of a number of problems with the previous contributed implementation
6959 (4.30/29). In particular:
6961 . If the quota is zero, the maildirsize file is maintained, but no quota is
6964 . If the maildir directory does not exist, it is created before any attempt
6965 to write a maildirsize file.
6967 . The quota value in the file is just a cache; if the quota is changed in
6968 the transport, the new value overrides.
6970 . A regular expression is available for excluding directories from the
6973 20. The autoreply transport checks the characters in options that define the
6974 message's headers; it allows continued headers, but it was checking with
6975 isspace() after an embedded newline instead of explicitly looking for a
6978 21. If all the "regular" hosts to which an address was routed had passed their
6979 expiry times, and had not reached their retry times, the address was
6980 bounced, even if fallback hosts were defined. Now Exim should go on to try
6983 22. Increased buffer sizes in the callout code from 1024 to 4096 to match the
6984 equivalent code in the SMTP transport. Some hosts send humungous responses
6985 to HELO/EHLO, more than 1024 it seems.
6987 23. Refactoring: code in filter.c used (void *) for "any old type" but this
6988 gives compiler warnings in some environments. I've now done it "properly",
6991 24. The replacement for inet_ntoa() that is used with gcc on IRIX systems
6992 (because of problems with the built-in one) was declared to return uschar *
6993 instead of char *, causing compiler failure.
6995 25. Fixed a file descriptor leak when processing alias/forward files.
6997 26. Fixed a minor format string issue in dbfn.c.
6999 27. Typo in exim.c: ("dmbnz" for "dbmnz").
7001 28. If a filter file refered to $h_xxx or $message_headers, and the headers
7002 contained RFC 2047 "words", Exim's memory could, under certain conditions,
7005 29. When a sender address is verified, it is cached, to save repeating the test
7006 when there is more than one recipient in a message. However, when the
7007 verification involves a callout, it is possible for different callout
7008 options to be set for different recipients. It is too complicated to keep
7009 track of this in the cache, so now Exim always runs a verification when a
7010 callout is required, relying on the callout cache for the optimization.
7011 The overhead is duplication of the address routing, but this should not be
7014 30. Fixed a bug in callout caching. If a RCPT command caused the sender address
7015 to be verified with callout=postmaster, and the main callout worked but the
7016 postmaster check failed, the verification correctly failed. However, if a
7017 subsequent RCPT command asked for sender verification *without* the
7018 postmaster check, incorrect caching caused this verification also to fail,
7021 31. Exim caches DNS lookup failures so as to avoid multiple timeouts; however,
7022 it was not caching the DNS options (qualify_single, search_parents) that
7023 were used when the lookup failed. A subsequent lookup with different
7024 options therefore always gave the same answer, though there were cases
7025 where it should not have. (Example: a "domains = !$mx_any" option on a
7026 dnslookup router: the "domains" option is always processed without any
7027 widening, but the router might have qualify_single set.) Now Exim uses the
7028 cached value only when the same options are set.
7030 32. Added John Jetmore's "exipick" utility to the distribution.
7032 33. GnuTLS: When an attempt to start a TLS session fails for any reason other
7033 than a timeout (e.g. a certificate is required, and is not provided), an
7034 Exim server now closes the connection immediately. Previously it waited for
7035 the client to close - but if the client is SSL, it seems that they each
7036 wait for each other, leading to a delay before one of them times out.
7038 34: GnuTLS: Updated the code to use the new GnuTLS 1.0.0 API. I have not
7039 maintained 0.8.x compatibility because I don't think many are using it, and
7040 it is clearly obsolete.
7042 35. Added TLS support for CRLs: a tls_crl global option and one for the smtp
7045 36. OpenSSL: $tls_certificate_verified was being set to 1 even if the
7046 client certificate was expired. A simple patch fixes this, though I don't
7047 understand the full logic of why the verify callback is called multiple
7050 37. OpenSSL: a patch from Robert Roselius: "Enable client-bug workaround.
7051 Versions of OpenSSL as of 0.9.6d include a 'CBC countermeasure' feature,
7052 which causes problems with some clients (such as the Certicom SSL Plus
7053 library used by Eudora). This option, SSL_OP_DONT_INSERT_EMPTY_FRAGMENTS,
7054 disables the coutermeasure allowing Eudora to connect."
7056 38. Exim was not checking that a write() to a log file succeeded. This could
7057 lead to Bad Things if a log got too big, in particular if it hit a file
7058 size limit. Exim now panics and dies if it cannot write to a log file, just
7059 as it does if it cannot open a log file.
7061 39. Modified OS/Makefile-Linux so that it now contains
7063 CFLAGS=-O -D_FILE_OFFSET_BITS=64 -D_LARGEFILE_SOURCE
7065 The two -D definitions ensure that Exim is compiled with large file
7066 support, which makes it possible to handle log files that are bigger than
7069 40. Fixed a subtle caching bug: if (in an ACL or a set of routers, for
7070 instance) a domain was checked against a named list that involved a lookup,
7071 causing $domain_data to be set, then another domain was checked against the
7072 same list, then the first domain was re-checked, the value of $domain_data
7073 after the final check could be wrong. In particular, if the second check
7074 failed, it could be set empty. This bug probably also applied to
7077 41. The strip_trailing_dot option was not being applied to the address given
7078 with the -f command-line option.
7080 42. The code for reading a message's header from the spool was incrementing
7081 $received_count, but never initializing it. This meant that the value was
7082 incorrect (doubled) while delivering a message in the same process in which
7083 it was received. In the most common configuration of Exim, this never
7084 happens - a fresh exec is done - but it can happen when
7085 deliver_drop_privilege is set.
7087 43. When Exim logs an SMTP synchronization error - client data sent too soon -
7088 it now includes up to 150 characters of the unexpected data in the log
7091 44. The exim_dbmbuild utility uses fixed size buffers for reading input lines
7092 and building data strings. The size of both of these buffers was 10 000
7093 bytes - far larger than anybody would *ever* want, thought I. Needless to
7094 say, somebody hit the limit. I have increased the maximum line length to
7095 20 000 and the maximum data length of concatenated lines to 100 000. I have
7096 also fixed two bugs, because there was no checking on these buffers. Tsk,
7097 tsk. Now exim_dbmbuild gives a message and exits with an error code if a
7098 buffer is too small.
7100 45. The exim_dbmbuild utility did not support quoted keys, as Exim does in
7101 lsearch lookups. Now it does.
7103 46. When parsing a route_list item in a manualroute router, a fixed-length
7104 buffer was used for the list of hosts. I made this 1024 bytes long,
7105 thinking that nobody would ever have a list of hosts that long. Wrong.
7106 Somebody had a whole pile of complicated expansion conditions, and the
7107 string was silently truncated, leading to an expansion error. It turns out
7108 that it is easier to change to an unlimited length (owing to other changes
7109 that have happened since this code was originally written) than to build
7110 structure for giving a limitation error. The length of the item that
7111 expands into the list of hosts is now unlimited.
7113 47. The lsearch lookup could not handle data where the length of text line was
7114 more than 4095 characters. Such lines were truncated, leading to shortened
7115 data being returned. It should now handle lines of any length.
7117 48. Minor wording revision: "cannot test xxx in yyy ACL" becomes "cannot test
7118 xxx condition in yyy ACL" (e.g. "cannot test domains condition in DATA
7121 49. Cosmetic tidy to scripts like exicyclog that are generated by globally
7122 replacing strings such as BIN_DIRECTORY in a source file: the replacement
7123 no longer happens in comment lines. A list of replacements is now placed
7124 at the head of all of the source files, except those whose only change is
7125 to replace PERL_COMMAND in the very first #! line.
7127 50. Replaced the slow insertion sort in queue.c, for sorting the list of
7128 messages on the queue, with a bottom-up merge sort, using code contributed
7129 by Michael Haardt. This should make operations like -bp somewhat faster on
7130 large queues. It won't affect queue runners, except when queue_run_in_order
7133 51. Installed eximstats 1.31 in the distribution.
7135 52. Added support for SRV lookups to the dnslookup router.
7137 53. If an ACL referred to $message_body or $message_body_end, the value was not
7138 reset for any messages that followed in the same SMTP session.
7140 54. The store-handling optimization for building very long strings was not
7141 differentiating between the different store pools. I don't think this
7142 actually made any difference in practice, but I've tidied it.
7144 55. While running the routers to verify a sender address, $sender_address
7145 was still set to the sender address. This is wrong, because when routing to
7146 send a bounce to the sender, it would be empty. Therefore, I have changed
7147 it so that, while verifying a sender address, $sender_address is set to <>.
7148 (There is no change to what happens when verifying a recipient address.)
7150 56. After finding MX (or SRV) records, Exim was doing a DNS lookup for the
7151 target A or AAAA records (if not already returned) without resetting the
7152 qualify_single or search_parents options of the DNS resolver. These are
7153 inappropriate in this case because the targets of MX and SRV records must
7154 be FQDNs. A broken DNS record could cause trouble if it happened to have a
7155 target that, when qualified, matched something in the local domain. These
7156 two options are now turned off when doing these lookups.
7158 57. It seems that at least some releases of Reiserfs (which does not have the
7159 concept of a fixed number of inodes) returns zero and not -1 for the
7160 number of available inodes. This interacted badly with check_spool_inodes,
7161 which assumed that -1 was the "no such thing" setting. What I have done is
7162 to check that the total number of inodes is greater than zero before doing
7163 the test of how many are available.
7165 58. When a "warn" ACL statement has a log_message modifier, the message is
7166 remembered, and not repeated. This is to avoid a lot of repetition when a
7167 message has many recipients that cause the same warning to be written.
7168 However, Exim was preserving the list of already written lines for an
7169 entire SMTP session, which doesn't seem right. The memory is now reset if a
7170 new message is started.
7172 59. The "rewrite" debugging flag was not showing the result of rewriting in the
7173 debugging output unless log_rewrite was also set.
7175 60. Avoid a compiler warning on 64-bit systems in dsearch.c by avoiding the use
7176 of (int)(handle) when we know that handle contains (void *)(-1).
7178 61. The Exim daemon panic-logs an error return when it closes the incoming
7179 connection. However "connection reset by peer" seems to be common, and
7180 isn't really an error worthy of noting specially, so that particular error
7183 62. When Exim is trying to find all the local interfaces, it used to panic and
7184 die if the ioctl to get the interface flags failed. However, it seems that
7185 on at least one OS (Solaris 9) it is possible to have an interface that is
7186 included in the list of interfaces, but for which you get a failure error
7187 for this call. This happens when the interface is not "plumbed" into a
7188 protocol (i.e. neither IPv4 nor IPv6). I've changed the code so that a
7189 failure of the "get flags" call assumes that the interface is down.
7191 63. Added a ${eval10: operator, which assumes all numbers are decimal. This
7192 makes life easier for people who are doing arithmetic on fields extracted
7193 from dates, where you often get leading zeros that should not be
7194 interpreted as octal.
7196 64. Added qualify_domain to the redirect router, to override the global
7199 65. If a pathologically long header line contained very many addresses (the
7200 report of this problem mentioned 10 000) and each of them was rewritten,
7201 Exim could use up a very large amount of memory. (It kept on making new
7202 copies of the header line as it rewrote, and never released the old ones.)
7203 At the expense of a bit more processing, the header rewriting function has
7204 been changed so that it no longer eats memory in this way.
7206 66. The generation of the Received: header has been moved from the time that a
7207 message starts to be received, to the time that it finishes. The timestamp
7208 in the Received: header should now be very close to that of the <= log
7209 line. There are two side-effects of this change:
7211 (a) If a message is rejected by a DATA or non-SMTP ACL or local_scan(), the
7212 logged header lines no longer include the local Received: line, because
7213 it has not yet been created. The same applies to a copy of the message
7214 that is returned to a non-SMTP sender when a message is rejected.
7216 (b) When a filter file is tested using -bf, no additional Received: header
7217 is added to the test message. After some thought, I decided that this
7220 This change does not affect the value of $received_for. It is still set
7221 after address rewriting, but before local_scan() is called.
7223 67. Installed the latest Cygwin-specific files from the Cygwin maintainer.
7225 68. GnuTLS: If an empty file is specified for tls_verify_certificates, GnuTLS
7226 gave an unhelpful panic error message, and a defer error. I have managed to
7227 change this behaviour so that it now rejects any supplied certificate,
7228 which seems right, as the list of acceptable certificates is empty.
7230 69. OpenSSL: If an empty file is specified for tls_verify_certificates, OpenSSL
7231 gave an unhelpful defer error. I have not managed to make this reject any
7232 supplied certificates, but the error message it gives is "no certificate
7233 supplied", which is not helpful.
7235 70. exigrep's output now also includes lines that are not associated with any
7236 message, but which match the given pattern. Implemented by a patch from
7237 Martin Sluka, which also tidied up the Perl a bit.
7239 71. Recipient callout verification, like sender verification, was using <> in
7240 the MAIL FROM command. This isn't really the right thing, since the actual
7241 sender may affect whether the remote host accepts the recipient or not. I
7242 have changed it to use the actual sender in the callout; this means that
7243 the cache record is now keyed on a recipient/sender pair, not just the
7244 recipient address. There doesn't seem to be a real danger of callout loops,
7245 since a callout by the remote host to check the sender would use <>.
7246 [SEE ABOVE: changed after hitting problems.]
7248 72. Exim treats illegal SMTP error codes that do not begin with 4 or 5 as
7249 temporary errors. However, in the case of such a code being given after
7250 the end of a data transmission (i.e. after ".") Exim was failing to write
7251 a retry record for the message. (Yes, there was some broken host that was
7252 actually sending 8xx at this point.)
7254 73. An unknown lookup type in a host list could cause Exim to panic-die when
7255 the list was checked. (An example that provoked this was putting <; in the
7256 middle of a list instead of at the start.) If this happened during a DATA
7257 ACL check, a -D file could be left lying around. This kind of configuration
7258 error no longer causes Exim to die; instead it causes a defer error. The
7259 incident is still logged to the main and panic logs.
7261 74. Buglet left over from Exim 3 conversion. The message "too many messages
7262 in one connection" was written to the rejectlog but not the mainlog, except
7263 when address rewriting (yes!) was being logged.
7265 75. Added write_rejectlog option.
7267 76. When a system filter was run not as root (that is, when system_filter_user
7268 was set), the values of the $n variables were not being returned to the
7269 main process; thus, they were not subsequently available in the $sn
7272 77. Added +return_path_on_delivery log selector.
7274 78. A connection timeout was being treated differently from recipients deferred
7275 when testing hosts_max_try with a message that was older than the host's
7276 retry timeout. (The host should not be counted, thus allowing all hosts to
7277 be tried at least once before bouncing.) This may have been the cause of an
7278 occasionally reported bug whereby a message would remain on the queue
7279 longer than the retry timeout, but would be bounced if a delivery was
7280 forced. I say "may" because I never totally pinned down the problem;
7281 setting up timeout/retry tests is difficult. See also the next item.
7283 79. The ultimate address timeout was not being applied to errors that involved
7284 a combination of host plus message (for example, a timeout on a MAIL
7285 command). When an address resolved to a number of possible hosts, and they
7286 were not all tried for each delivery (e.g. because of hosts_max_try), a
7287 message could remain on the queue longer than the retry timeout.
7289 80. Sieve bug: "stop" inside "elsif" was broken. Applied a patch from Michael
7292 81. Fixed an obscure SMTP outgoing bug which required at least the following
7293 conditions: (a) there was another message waiting for the same server;
7294 (b) the server returned 5xx to all RCPT commands in the first message so
7295 that the message was not completed; (c) the server dropped the connection
7296 or gave a negative response to the RSET that Exim sends to abort the
7297 transaction. The observed case was a dropped connection after DATA that had
7298 been sent in pipelining mode. That is, the server had advertised PIPELINING
7299 but was not implementing it correctly. The effect of the bug was incorrect
7300 behaviour, such as trying another host, and this could lead to a crash.
7306 1. The 3rd arguments to getsockname(), getpeername(), and accept() in exim.c
7307 and daemon.c were passed as pointers to ints; they should have been
7308 pointers to socklen_t variables (which are typically unsigned ints).
7310 2. Some signed/unsigned type warnings in the os.c file for Linux have been
7313 3. Fixed a really odd bug that affected only the testing scheme; patching a
7314 certain fixed string in the binary changed the value of another string that
7315 happened to be identical to the end of the original first string.
7317 4. When gethostbyname() (or equivalent) is passed an IP address as a "host
7318 name", it returns that address as the IP address. On some operating
7319 systems (e.g. Solaris), it also passes back the IP address string as the
7320 "host name". However, on others (e.g. Linux), it passes back an empty
7321 string. Exim wasn't checking for this, and was changing the host name to an
7322 empty string, assuming it had been canonicalized.
7324 5. Although rare, it is permitted to have more than one PTR record for a given
7325 IP address. I thought that gethostbyaddr() or getipnodebyaddr() always gave
7326 all the names associated with an address, because they do in Solaris.
7327 However, it seems that they do not in Linux for data that comes from the
7328 DNS. If an address in /etc/hosts has multiple names, they _are_ all given.
7329 I found this out when I moved to a new Linux workstation and tried to run
7330 the Exim test suite.
7332 To get round this problem I have changed the code so that it now does its
7333 own call to the DNS to look up PTR records when searching for a host name.
7334 If nothing can be found in the DNS, it tries gethostbyaddr(), so that
7335 addresses that are only in /etc/hosts are still found.
7337 This behaviour is, however, controlled by an option called host_lookup_
7338 order, which defaults to "bydns:byaddr". If people want to use the other
7339 order, or indeed, just use one or the other means of lookup, they can
7340 specify it in this variable.
7342 6. If a PTR record yields an empty name, Exim treats it as non-existent. In
7343 some operating systems, this comes back from gethostbyaddr() as an empty
7344 string, and this is what Exim used to test for. However, it seems that in
7345 other systems, "." is yielded. Exim now tests for this case too.
7347 7. The values of check_spool_space and check_log_space are now held internally
7348 as a number of kilobytes instead of an absolute number of bytes. If a
7349 numbers is specified without 'K' or 'M', it is rounded up to the nearest
7350 kilobyte. This means that much larger values can be stored.
7352 8. Exim monitor: an attempt to get the action menu when not actually pointing
7353 at a message produces an empty menu entitled "No message selected". This
7354 works on Solaris (OpenWindows). However, XFree86 does not like a menu with
7355 no entries in it ("Shell widget menu has zero width and/or height"). So I
7356 have added a single, blank menu entry in this case.
7358 9. Added ${quote_local_part.
7360 10. MIME decoding is now applied to the contents of Subject: header lines when
7363 11. Now that a reference to $sender_host_address automatically causes a reverse
7364 lookup to occur if necessary (4.13/18), there is no need to arrange for a
7365 host lookup before query-style lookups in lists that might use this
7366 variable. This has therefore been abolished, and the "net-" prefix is no
7367 longer necessary for query-style lookups.
7369 12. The Makefile for SCO_SV contained a setting of LDFLAGS. This appears to
7370 have been a typo for LFLAGS, so it has been changed.
7372 13. The install script calls Exim with "-C /dev/null" in order to find the
7373 version number. If ALT_CONFIG_PREFIX was set, this caused an error message
7374 to be output. However, since Exim outputs its version number before the
7375 error, it didn't break the script. It just looked ugly. I fixed this by
7376 always allowing "-C /dev/null" if the caller is root.
7378 14. Ignore overlarge ACL variable number when reading spool file - insurance
7379 against a later release with more variables having written the file.
7381 15. The standard form for an IPv6 address literal was being rejected by EHLO.
7382 Example: [IPv6:2002:c1ed:8229:10:202:2dff:fe07:a42a]. Exim now accepts
7383 this, as well as the form without the "IPv6" on the front.
7385 16. Added CHOWN_COMMAND=/usr/sbin/chown and LIBS=-lresolv to the
7386 OS/Makefile-Darwin file.
7388 17. Fixed typo in lookups/ldap.c: D_LOOKUP should be D_lookup. This applied
7389 only to LDAP libraries that do not have LDAP_OPT_DEREF.
7391 18. After change 4.21/52, "%ld" was used to format the contents of the $inode
7392 variable. However, some OS use ints for inodes. I've added cast to long int
7393 to get rid of the compiler warning.
7395 19. I had forgotten to lock out "/../" in configuration file names when
7396 ALT_CONFIG_PREFIX was set.
7398 20. Routers used for verification do not need to specify transports. However,
7399 if such a router generated a host list, and callout was configured, Exim
7400 crashed, because it could not find a port number from the (non-existent)
7401 transport. It now assumes port 25 in this circumstance.
7403 21. Added the -t option to exigrep.
7405 22. If LOOKUP_LSEARCH is defined, all three linear search methods (lsearch,
7406 wildlsearch, nwildlsearch) are compiled. LOOKUP_WILDLSEARCH and LOOKUP_
7407 NWILDLSEARCH are now obsolete, but retained for compatibility. If either of
7408 them is set, LOOKUP_LSEARCH is forced.
7410 23. "exim -bV" now outputs a list of lookups that are included in the binary.
7412 24. Added sender and host information to the "rejected by local_scan()" log
7413 line; previously there was no indication of these.
7415 25. Added .include_if_exists.
7417 26. Change 3.952/11 added an explicit directory sync on top of a file sync for
7418 Linux. It turns out that not all file systems support this. Apparently some
7419 versions of NFS do not. (It's rare to put Exim's spool on NFS, but people
7420 do it.) To cope with this, the error EINVAL, which means that sync-ing is
7421 not supported on the file descriptor, is now ignored when Exim is trying to
7422 sync a directory. This applies only to Linux.
7424 27. Added -DBIND_8_COMPAT to the CLFAGS setting for Darwin.
7426 28. In Darwin (MacOS X), the PAM headers are in /usr/include/pam and not in
7427 /usr/include/security. There's now a flag in OS/os.h-Darwin to cope with
7430 29. Added support for maildirsize files from supplied patch (modified a bit).
7432 30. The use of :fail: followed by an empty string could lead Exim to respond to
7433 sender verification failures with (e.g.):
7435 550 Verification failed for <xxx>
7436 550 Sender verify failed
7438 where the first response line was missing the '-' that indicates it is not
7439 the final line of the response.
7441 31. The loop for finding the name of the user that called Exim had a hardwired
7442 limit of 10; it now uses the value of finduser_retries, which is used for
7443 all other user lookups.
7445 32. Added $received_count variable, available in data and not_smtp ACLs, and at
7448 33. Exim was neglecting to zero errno before one call of strtol() when
7449 expanding a string and expecting an integer value. On some systems this
7450 resulted in spurious "integer overflow" errors. Also, it was casting the
7451 result into an int without checking.
7453 34. Testing for a connection timeout using "timeout_connect" in the retry rules
7454 did not work. The code looks as if it has *never* worked, though it appears
7455 to have been documented since at least release 1.62. I have made it work.
7457 35. The "timeout_DNS" error in retry rules, also documented since at least
7458 1.62, also never worked. As it isn't clear exactly what this means, and
7459 clearly it isn't a major issue, I have abolished the feature by treating it
7460 as "timeout", and writing a warning to the main and panic logs.
7462 36. The display of retry rules for -brt wasn't always showing the error code
7465 37. Added new error conditions to retry rules: timeout_A, timeout_MX,
7466 timeout_connect_A, timeout_connect_MX.
7468 38. Rewriting the envelope sender at SMTP time did not allow it to be rewritten
7469 to the empty sender.
7471 39. The daemon was not analysing the content of -oX till after it had closed
7472 stderr and disconnected from the controlling terminal. This meant that any
7473 syntax errors were only noted on the panic log, and the return code from
7474 the command was 0. By re-arranging the code a little, I've made the
7475 decoding happen first, so such errors now appear on stderr, and the return
7476 code is 1. However, the actual setting up of the sockets still happens in
7477 the disconnected process, so errors there are still only recorded on the
7480 40. A daemon listener on a wildcard IPv6 socket that also accepts IPv4
7481 connections (as happens on some IP stacks) was logged at start up time as
7482 just listening for IPv6. It now logs "IPv6 with IPv4". This differentiates
7483 it from "IPv6 and IPv4", which means that two separate sockets are being
7486 41. The debug output for gethostbyname2() or getipnodebyname() failures now
7487 says whether AF_INET or AF_INET6 was passed as an argument.
7489 42. Exiwhat output was messed up when time zones were included in log
7492 43. Exiwhat now gives more information about the daemon's listening ports,
7493 and whether -tls-on-connect was used.
7495 44. The "port" option of the smtp transport is now expanded.
7497 45. A "message" modifier in a "warn" statement in a non-message ACL was being
7498 silently ignored. Now an error message is written to the main and panic
7501 46. There's a new ACL modifier called "logwrite" which writes to a log file
7502 as soon as it is encountered.
7504 47. Added $local_user_uid and $local_user_gid at routing time.
7506 48. Exim crashed when trying to verify a sender address that was being
7509 49. Exim was recognizing only a space character after ".include". It now also
7510 recognizes a tab character.
7512 50. Fixed several bugs in the Perl script that creates the exim.8 man page by
7513 extracting the relevant information from the specification. The man page no
7514 longer contains scrambled data for the -d option, and I've added a section
7515 at the front about calling Exim under different names.
7517 51. Added "extra_headers" argument to the "mail" command in filter files.
7519 52. Redirecting mail to an unqualified address in a Sieve filter caused Exim to
7522 53. Installed eximstats 1.29.
7524 54. Added transport_filter_timeout as a generic transport option.
7526 55. Exim no longer adds an empty Bcc: header to messages that have no To: or
7527 Cc: header lines. This was required by RFC 822, but it not required by RFC
7530 56. Exim used to add From:, Date:, and Message-Id: header lines to any
7531 incoming messages that did not have them. Now it does so only if the
7532 message originates locally, that is, if there is no associated remote host
7533 address. When Resent- header lines are present, this applies to the Resent-
7534 lines rather than the non-Resent- lines.
7536 57. Drop incoming SMTP connection after too many syntax or protocol errors. The
7537 limit is controlled by smtp_max_synprot_errors, defaulting to 3.
7539 58. Messages for configuration errors now include the name of the main
7540 configuration file - useful now that there may be more than one file in a
7541 list (.included file names were always shown).
7543 59. Change 4.21/82 (run initgroups() when starting the daemon) causes problems
7544 for those rare installations that do not start the daemon as root or run it
7545 setuid root. I've cut out the call to initgroups() if the daemon is not
7548 60. The Exim user and group can now be bound into the binary as text strings
7549 that are looked up at the start of Exim's processing.
7551 61. Applied a small patch for the Interbase code, supplied by Ard Biesheuvel.
7553 62. Added $mailstore_basename variable.
7555 63. Installed patch to sieve.c from Michael Haardt.
7557 64. When Exim failed to open the panic log after failing to open the main log,
7558 the original message it was trying to log was written to stderr and debug
7559 output, but if they were not available (the usual case in production), it
7560 was lost. Now it is written to syslog before the two lines that record the
7561 failures to open the logs.
7563 65. Users' Exim filters run in subprocesses under the user's uid. It is
7564 possible for a "deliver" command or an alias in a "personal" command to
7565 provoke an address rewrite. If logging of address rewriting is configured,
7566 this fails because the process is not running as root or exim. There may be
7567 a better way of dealing with this, but for the moment (because 4.30 needs
7568 to be released), I have disabled address rewrite logging when running a
7569 filter in a non-root, non-exim process.
7575 1. The buildconfig auxiliary program wasn't quoting the value set for
7576 HEADERS_CHARSET. This caused a compilation error complaining that 'ISO' was
7577 not defined. This bug was masked in 4.22 by the effect that was fixed in
7580 2. Some messages that were rejected after a message id was allocated were
7581 shown as "incomplete" by exigrep. It no longer does this for messages that
7582 are rejected by local_scan() or the DATA or non-SMTP ACLs.
7584 3. If a Message-ID: header used a domain literal in the ID, and Exim did not
7585 have allow_domain_literals set, the ID did not get logged in the <= line.
7586 Domain literals are now always recognized in Message-ID: header lines.
7588 4. The first argument for a ${extract expansion item is the key name or field
7589 number. Leading and trailing spaces in this item were not being ignored,
7590 causing some misleading effects.
7592 5. When deliver_drop_privilege was set, single queue runner processes started
7593 manually (i.e. by the command "exim -q") or by the daemon (which uses the
7594 same command in the process it spins off) were not dropping privilege.
7596 6. When the daemon running as "exim" started a queue runner, it always
7597 re-executed Exim in the spun-off process. This is a waste of effort when
7598 deliver_drop_privilege is set. The new process now just calls the
7599 queue-runner function directly.
7605 1. Typo in the src/EDITME file: it referred to HEADERS_DECODE_TO instead of
7608 2. Change 4.21/73 introduced a bug. The pid file path set by -oP was being
7609 ignored. Though the use of -oP was forcing the writing of a pid file, it
7610 was always written to the default place.
7612 3. If the message "no IP address found for host xxxx" is generated during
7613 incoming verification, it is now followed by identification of the incoming
7614 connection (so you can more easily find what provoked it).
7616 4. Bug fix for Sieve filters: "stop" inside a block was not working properly.
7618 5. Added some features to "harden" Exim a bit more against certain attacks:
7620 (a) There is now a build-time option called FIXED_NEVER_USERS that can
7621 be put in Local/Makefile. This is like the never_users runtime option,
7622 but it cannot be overridden. The default setting is "root".
7624 (b) If ALT_CONFIG_PREFIX is defined in Local/Makefile, it specifies a
7625 prefix string with which any file named in a -C command line option
7628 (c) If ALT_CONFIG_ROOT_ONLY is defined in Local/Makefile, root privilege
7629 is retained for -C and -D only if the caller of Exim is root. Without
7630 it, the exim user may also use -C and -D and retain privilege.
7632 (d) If DISABLE_D_OPTION is defined in Local/Makefile, the use of the -D
7633 command line option is disabled.
7635 6. Macro names set by the -D option must start with an upper case letter, just
7636 like macro names defined in the configuration file.
7638 7. Added "dereference=" facility to LDAP.
7640 8. Two instances of the typo "uknown" in the source files are fixed.
7642 9. If a PERL_COMMAND setting in Local/Makefile was not at the start of a line,
7643 the Configure-Makefile script screwed up while processing it.
7645 10. Incorporated PCRE 4.4.
7647 11. The SMTP synchronization check was not operating right at the start of an
7648 SMTP session. For example, it could not catch a HELO sent before the client
7649 waited for the greeting. There is now a check for outstanding input at the
7650 point when the greeting is written. Because of the duplex, asynchronous
7651 nature of TCP/IP, it cannot be perfect - the incorrect input may be on its
7652 way, but not yet received, when the check is performed.
7654 12. Added tcp_nodelay to make it possible to turn of the setting of TCP_NODELAY
7655 on TCP/IP sockets, because this apparently causes some broken clients to
7658 13. Installed revised OS/Makefile-CYGWIN and OS/os.c-cygwin (the .h file was
7659 unchanged) from the Cygwin maintainer.
7661 14. The code for -bV that shows what is in the binary showed "mbx" when maildir
7662 was supported instead of testing for mbx. Effectively a typo.
7664 15. The spa authenticator server code was not checking that the input it
7665 received was valid base64.
7667 16. The debug output line for the "set" modifier in ACLs was not showing the
7668 name of the variable that was being set.
7670 17. Code tidy: the variable type "vtype_string" was never used. Removed it.
7672 18. Previously, a reference to $sender_host_name did not cause a DNS reverse
7673 lookup on its own. Something else was needed to trigger the lookup. For
7674 example, a match in host_lookup or the need for a host name in a host list.
7675 Now, if $sender_host_name is referenced and the host name has not yet been
7676 looked up, a lookup is performed. If the lookup fails, the variable remains
7677 empty, and $host_lookup_failed is set to "1".
7679 19. Added "eqi" as a case-independent comparison operator.
7681 20. The saslauthd authentication condition could segfault if neither service
7682 nor realm was specified.
7684 21. If an overflowing value such as "2048M" was set for message_size_limit, the
7685 error message that was logged was misleading, and incoming SMTP
7686 connections were dropped. The message is now more accurate, and temporary
7687 errors are given to SMTP connections.
7689 22. In some error situations (such as 21 above) Exim rejects all SMTP commands
7690 (except RSET) with a 421 error, until QUIT is received. However, it was
7691 failing to send a response to QUIT.
7693 23. The HELO ACL was being run before the code for helo_try_verify_hosts,
7694 which made it impossible to use "verify = helo" in the HELO ACL. The HELO
7695 ACL is now run after the helo_try_verify_hosts code.
7697 24. "{MD5}" and "{SHA1}" are now recognized as equivalent to "{md5"} and
7698 "{sha1}" in the "crypteq" expansion condition (in fact the comparison is
7699 case-independent, so other case variants are also recognized). Apparently
7700 some systems use these upper case variants.
7702 25. If more than two messages were waiting for the same host, and a transport
7703 filter was specified for the transport, Exim sent two messages over the
7704 same TCP/IP connection, and then failed with "socket operation on non-
7705 socket" when it tried to send the third.
7707 26. Added Exim::debug_write and Exim::log_write for embedded Perl use.
7709 27. The extern definition of crypt16() in expand.c was not being excluded when
7710 the OS had its own crypt16() function.
7712 28. Added bounce_return_body as a new option, and bounce_return_size_limit
7713 as a preferred synonym for return_size_limit, both as an option and as an
7716 29. Added LIBS=-liconv to OS/Makefile-OSF1.
7718 30. Changed the default configuration ACL to relax the local part checking rule
7719 for addresses that are not in any local domains. For these addresses,
7720 slashes and pipe symbols are allowed within local parts, but the sequence
7721 /../ is explicitly forbidden.
7723 31. SPA server authentication was not clearing the challenge buffer before
7726 32. log_message in a "warn" ACL statement was writing to the reject log as
7727 well as to the main log, which contradicts the documentation and doesn't
7728 seem right (because no rejection is happening). So I have stopped it.
7730 33. Added Ard Biesheuvel's lookup code for accessing an Interbase database.
7731 However, I am unable to do any testing of this.
7733 34. Fixed an infelicity in the appendfile transport. When checking directories
7734 for a mailbox, to see if any needed to be created, it was accidentally
7735 using path names with one or more superfluous leading slashes; tracing
7736 would show up entries such as stat("///home/ph10", 0xFFBEEA48).
7738 35. If log_message is set on a "discard" verb in a MAIL or RCPT ACL, its
7739 contents are added to the log line that is written for every discarded
7740 recipient. (Previously a log_message setting was ignored.)
7742 36. The ${quote: operator now quotes the string if it is empty.
7744 37. The install script runs exim in order to find its version number. If for
7745 some reason other than non-existence or emptiness, which it checks, it
7746 could not run './exim', it was installing it with an empty version number,
7747 i.e. as "exim-". This error state is now caught, and the installation is
7750 38. An argument was missing from the function that creates an error message
7751 when Exim fails to connect to the socket for saslauthd authentication.
7752 This could cause Exim to crash, or give a corrupted message.
7754 39. Added isip, isip4, and isip6 to ${if conditions.
7756 40. The ACL variables $acl_xx are now saved with the message, and can be
7757 accessed later in routers, transports, and filters.
7759 41. The new lookup type nwildlsearch is like wildlsearch, except that the key
7760 strings in the file are not string-expanded.
7762 42. If a MAIL command specified a SIZE value that was too large to fit into an
7763 int variable, the check against message_size_limit failed. Such values are
7764 now forced to INT_MAX, which is around 2Gb for a 32-bit variable. Maybe one
7765 day this will have to be increased, but I don't think I want to be around
7766 when emails are that large.
7773 1. Removed HAVE_ICONV=yes from OS/Makefile-FreeBSD, since it seems that
7774 iconv() is not standard in FreeBSD.
7776 2. Change 4.21/17 was buggy and could cause stack overwriting on a system with
7777 IPv6 enabled. The observed symptom was a segmentation fault on return from
7778 the function os_common_find_running_interfaces() in src/os.c.
7780 3. In the check_special_case() function in daemon.c I had used "errno" as an
7781 argument name, which causes warnings on some systems. This was basically a
7782 typo, since it was named "eno" in the comments!
7784 4. The code that waits for the clock to tick (at a resolution of some fraction
7785 of a second) so as to ensure message-id uniqueness was always waiting for
7786 at least one whole tick, when it could have waited for less. [This is
7787 almost certainly not relevant at current processor speeds, where it is
7788 unlikely to ever wait at all. But we try to future-proof.]
7790 5. The function that sleeps for a time interval that includes fractions of a
7791 second contained a race. It did not block SIGALRM between setting the
7792 timer, and suspending (a couple of lines later). If the interval was short
7793 and the sigsuspend() was delayed until after it had expired, the suspension
7794 never ended. On busy systems this could lead to processes getting stuck for
7797 6. Some uncommon configurations may cause a lookup to happen in a queue runner
7798 process, before it forks any delivery processes. The open lookup caching
7799 mechanism meant that the open file or database connection was passed into
7800 the delivery process. The problem was that delivery processes always tidy
7801 up cached lookup data. This could cause a problem for the next delivery
7802 process started by the queue runner, because the external queue runner
7803 process does not know about the closure. So the next delivery process
7804 still has data in the lookup cache. In the case of a file lookup, there was
7805 no problem because closing a file descriptor in a subprocess doesn't affect
7806 the parent. However, if the lookup was caching a connection to a database,
7807 the connection was closed, and the second delivery process was likely to
7808 see errors such as "PGSQL: query failed: server closed the connection
7809 unexpectedly". The problem has been fixed by closing all cached lookups
7810 in a queue runner before running a delivery process.
7812 7. Compiler warning on Linux for the second argument of iconv(), which doesn't
7813 seem to have the "const" qualifier which it has on other OS. I've
7816 8. Change 4.21/2 was too strict. It is only if there are two authenticators
7817 *of the same type* (client or server) with the same public name that an
7818 error should be diagnosed.
7820 9. When Exim looked up a host name for an IP address, but failed to find the
7821 original IP address when looking up the host name (a safety check), it
7822 output the message "<ip address> does not match any IP for NULL", which was
7823 confusing, to say the least. The bug was that the host name should have
7824 appeared instead of "NULL".
7826 10. Since release 3.03, if Exim is called by a uid other than root or the Exim
7827 user that is built into the binary, and the -C or -D options is used, root
7828 privilege is dropped before the configuration file is read. In addition,
7829 logging is switched to stderr instead of the normal log files. If the
7830 configuration then re-defines the Exim user, the unprivileged environment
7831 is probably not what is expected, so Exim logs a panic warning message (but
7834 However, if deliver_drop_privilege is set, the unprivileged state may well
7835 be exactly what is intended, so the warning has been cut out in that case,
7836 and Exim is allowed to try to write to its normal log files.
7842 1. smtp_return_error_details was not giving details for temporary sender
7843 or receiver verification errors.
7845 2. Diagnose a configuration error if two authenticators have the same public
7848 3. Exim used not to create the message log file for a message until the first
7849 delivery attempt. This could be confusing when incoming messages were held
7850 for policy or load reasons. The message log file is now created at the time
7851 the message is received, and an initial "Received" line is written to it.
7853 4. The automatically generated man page for command line options had a minor
7854 bug that caused no ill effects; however, a more serious problem was that
7855 the procedure for building the man page automatically didn't always
7856 operate. Consequently, release 4.20 contains an out-of-date version. This
7857 shouldn't happen again.
7859 5. When building Exim with embedded Perl support, the script that builds the
7860 Makefile was calling 'perl' to find its compile-time parameters, ignoring
7861 any setting of PERL_COMMAND in Local/Makefile. This is now fixed.
7863 6. The freeze_tell option was not being used for messages that were frozen on
7864 arrival, either by an ACL or by local_scan().
7866 7. Added the smtp_incomplete_transaction log selector.
7868 8. After STARTTLS, Exim was not forgetting that it had advertised AUTH, so it
7869 was accepting AUTH without a new EHLO.
7871 9. Added tls_remember_esmtp to cope with YAEB. This allows AUTH and other
7872 ESMTP extensions after STARTTLS without a new EHLO, in contravention of the
7875 10. Logging of TCP/IP connections (when configured) now happens in the main
7876 daemon process instead of the child process, so that the TCP/IP connection
7877 count is more accurate (but it can never be perfect).
7879 11. The use of "drop" in a nested ACL was not being handled correctly in the
7880 outer ACL. Now, if condition failure induced by the nested "drop" causes
7881 the outer ACL verb to deny access ("accept" or "discard" after "endpass",
7882 or "require"), the connection is dropped.
7884 12. Similarly, "discard" in a nested ACL wasn't being handled. A nested ACL
7885 that yield "discard" can now be used with an "accept" or a "discard" verb,
7886 but an error is generated for any others (because I can't see a useful way
7887 to define what should happen).
7889 13. When an ACL is read dynamically from a file (or anywhere else), the lines
7890 are now processed in the same way as lines in the Exim configuration file.
7891 In particular, continuation lines are supported.
7893 14. Added the "dnslists = a.b.c!=n.n.n.n" feature.
7895 15. Added -ti meaning -t -i.
7897 16. Check for letters, digits, hyphens, and dots in the names of dnslist
7898 domains, and warn by logging if others are found.
7900 17. At least on BSD, alignment is not guaranteed for the array of ifreq's
7901 returned from GIFCONF when Exim is trying to find the list of interfaces on
7902 a host. The code in os.c has been modified to copy each ifreq to an aligned
7903 structure in all cases.
7905 Also, in some cases, the returned ifreq's were being copied to a 'struct
7906 ifreq' on the stack, which was subsequently passed to host_ntoa(). That
7907 means the last couple of bytes of an IPv6 address could be chopped if the
7908 ifreq contained only a normal sockaddr (14 bytes storage).
7910 18. Named domain lists were not supported in the hosts_treat_as_local option.
7911 An entry such as +xxxx was not recognized, and was treated as a literal
7914 19. Ensure that header lines added by a DATA ACL are included in the reject log
7915 if the ACL subsequently rejects the message.
7917 20. Upgrade the cramtest.pl utility script to use Digest::MD5 instead of just
7918 MD5 (which is deprecated).
7920 21. When testing a filter file using -bf, Exim was writing a message when it
7921 took the sender from a "From " line in the message, but it was not doing so
7922 when it took $return_path from a Return-Path: header line. It now does.
7924 22. If the contents of a "message" modifier for a "warn" ACL verb do not begin
7925 with a valid header line field name (a series of printing characters
7926 terminated by a colon, Exim now inserts X-ACL-Warn: at the beginning.
7928 23. Changed "disc" in the source to "disk" to conform to the documentation and
7929 the book and for uniformity.
7931 24. Ignore Sendmail's -Ooption=value command line item.
7933 25. When execve() failed while trying to run a command in a pipe transport,
7934 Exim was returning EX_UNAVAILABLE (69) from the subprocess. However, this
7935 could be confused with a return value of 69 from the command itself. This
7936 has been changed to 127, the value the shell returns if it is asked to run
7937 a non-existent command. The wording for the related log line suggests a
7938 non-existent command as the problem.
7940 26. If received_header_text expands to an empty string, do not add a Received:
7941 header line to the message. (Well, it adds a token one on the spool, but
7942 marks it "old" so that it doesn't get used or transmitted.)
7944 27. Installed eximstats 1.28 (addition of -nt option).
7946 28. There was no check for failure on the call to getsockname() in the daemon
7947 code. This can fail if there is a shortage of resources on the system, with
7948 ENOMEM, for example. A temporary error is now given on failure.
7950 29. Contrary to the C standard, it seems that in some environments, the
7951 equivalent of setlocale(LC_ALL, "C") is not obeyed at the start of a C
7952 program. Exim now does this explicitly; it affects the formatting of
7953 timestamps using strftime().
7955 30. If exiqsumm was given junk data, it threw up some uninitialized variable
7956 complaints. I've now initialized all the variables, to avoid this.
7958 32. Header lines added by a system filter were not being "seen" during
7959 transport-time rewrites.
7961 33. The info_callback() function passed to OpenSSL is set up with type void
7962 (*)(SSL *, int, int), as described somewhere. However, when calling the
7963 function (actually a macro) that sets it up, the type void(*)() is
7964 expected. I've put in a cast to prevent warnings from picky compilers.
7966 34. If a DNS black list lookup found a CNAME record, but there were no A
7967 records associated with the domain it pointed at, Exim crashed.
7969 35. If a DNS black list lookup returned more than one A record, Exim ignored
7970 all but the first. It now scans all returned addresses if a particular IP
7971 value is being sought. In this situation, the contents of the
7972 $dnslist_value variable are a list of all the addresses, separated by a
7975 36. Tightened up the rules for host name lookups using reverse DNS. Exim used
7976 to accept a host name and all its aliases if the forward lookup for any of
7977 them yielded the IP address of the incoming connection. Now it accepts only
7978 those names whose forward lookup yields the correct IP address. Any other
7979 names are discarded. This closes a loophole whereby a rogue DNS
7980 administrator could create reverse DNS records to break through a
7981 wildcarded host restriction in an ACL.
7983 37. If a user filter or a system filter that ran in a subprocess used any of
7984 the numerical variables ($1, $2 etc), or $thisaddress, in a pipe command,
7985 the wrong values were passed to the pipe command ($thisaddress had the
7986 value of $0, $0 had the value of $1, etc). This bug was introduced by
7987 change 4.11/101, and not discovered because I wrote an inadequate test. :-(
7989 38. Improved the line breaking for long SMTP error messages from ACLs.
7990 Previously, if there was no break point between 40 and 75 characters, Exim
7991 left the rest of the message alone. Two changes have been made: (a) I've
7992 reduced the minimum length to 35 characters; (b) if it can't find a break
7993 point between 35 and 75 characters, it looks ahead and uses the first one
7994 that it finds. This may give the occasional overlong line, but at least the
7995 remaining text gets split now.
7997 39. Change 82 of 4.11 was unimaginative. It assumed the limit on the number of
7998 file descriptors might be low, and that setting 1000 would always raise it.
7999 It turns out that in some environments, the limit is already over 1000 and
8000 that lowering it causes trouble. So now Exim takes care not to decrease it.
8002 40. When delivering a message, the value of $return_path is set to $sender_
8003 address at the start of routing (routers may change the value). By an
8004 oversight, this default was not being set up when an address was tested by
8005 -bt or -bv, which affected the outcome if any router or filter referred to
8008 41. The idea of the "warn" ACL verb is that it adds a header or writes to the
8009 log only when "message" or "log_message" are set. However, if one of the
8010 conditions was an address verification, or a call to a nested ACL, the
8011 messages generated by the underlying test were being passed through. This
8012 no longer happens. The underlying message is available in $acl_verify_
8013 message for both "message" and "log_message" expansions, so it can be
8014 passed through if needed.
8016 42. Added RFC 2047 interpretation of header lines for $h_ expansions, with a
8017 new expansion $bh_ to give the encoded byte string without charset
8018 translation. Translation happens only if iconv() is available; HAVE_ICONV
8019 indicates this at build time. HEADERS_CHARSET gives the charset to
8020 translate to; headers_charset can change it in the configuration, and
8021 "headers charset" can change it in an individual filter file.
8023 43. Now that we have a default RFC 2047 charset (see above), the code in Exim
8024 that creates RFC 2047 encoded "words" labels them as that charset instead
8025 of always using iso-8859-1. The cases are (i) the explicit ${rfc2047:
8026 expansion operator; (ii) when Exim creates a From: line for a local
8027 message; (iii) when a header line is rewritten to include a "phrase" part.
8029 44. Nasty bug in exiqsumm: the regex to skip already-delivered addresses was
8030 buggy, causing it to skip the first lines of messages whose message ID
8031 ended in 'D'. This would not have bitten before Exim release 4.14, because
8032 message IDs were unlikely to end in 'D' before then. The effect was to have
8033 incorrect size information for certain domains.
8035 45. #include "config.h" was missing at the start of the crypt16.c module. This
8036 caused trouble on Tru64 (aka OSF1) systems, because HAVE_CRYPT16 was not
8039 46. If there was a timeout during a "random" callout check, Exim treated it as
8040 a failure of the random address, and carried on sending RSET and the real
8041 address. If the delay was just some slowness somewhere, the response to the
8042 original RCPT would be taken as a response to RSET and so on, causing
8043 mayhem of various kinds.
8045 47. Change 50 for 4.20 was a heap of junk. I don't know what I was thinking
8046 when I implemented it. It didn't allow for the fact that some option values
8047 may legitimately be negative (e.g. size_addition), and it didn't even do
8048 the right test for positive values.
8050 48. Domain names in DNS records are case-independent. Exim always looks them up
8051 in lower case. Some resolvers return domain names in exactly the case they
8052 appear in the zone file, that is, they may contain uppercase letters. Not
8053 all resolvers do this - some return always lower case. Exim was treating a
8054 change of case by a resolver as a change of domain, similar to a widening
8055 of a domain abbreviation. This triggered its re-routing code and so it was
8056 trying to route what was effectively the same domain again. This normally
8057 caused routing to fail (because the router wouldn't handle the domain
8058 twice). Now Exim checks for this case specially, and just changes the
8059 casing of the domain that it ultimately uses when it transmits the message
8062 49. Added Sieve (RFC 3028) support, courtesy of Michael Haardt's contributed
8065 50. If a filter generated a file delivery with a non-absolute name (possible if
8066 no home directory exists for the router), the forbid_file option was not
8069 51. Added '&' feature to dnslists, to provide bit mask matching in addition to
8070 the existing equality matching.
8072 52. Exim was using ints instead of ino_t variables in some places where it was
8073 dealing with inode numbers.
8075 53. If TMPDIR is defined in Local/Makefile (default in src/EDITME is
8076 TMPDIR="/tmp"), Exim checks for the presence of an environment variable
8077 called TMPDIR, and if it finds it is different, it changes its value.
8079 54. The smtp_printf() function is now made available to local_scan() so
8080 additional output lines can be written before returning. There is also an
8081 smtp_fflush() function to enable the detection of a dropped connection.
8082 The variables smtp_input and smtp_batched_input are exported to
8085 55. Changed the default runtime configuration: the message "Unknown user"
8086 has been removed from the ACL, and instead placed on the localuser router,
8087 using the cannot_route_message feature. This means that any verification
8088 failures that generate their own messages won't get overridden. Similarly,
8089 the "Unrouteable address" message that was in the ACL for unverifiable
8090 relay addresses has also been removed.
8092 56. Added hosts_avoid_esmtp to the smtp transport.
8094 57. The exicyclog script was not checking for the esoteric option
8095 CONFIGURE_FILE_USE_EUID in the Local/Makefile. It now does this, but it
8096 will work only if exicyclog is run under the appropriate euid.
8098 58. Following a discussion on the list, the rules by which Exim recognises line
8099 endings on incoming messages have been changed. The -dropcr and drop_cr
8100 options are now no-ops, retained only for backwards compatibility. The
8101 following line terminators are recognized: LF CRLF CR. However, special
8102 processing applies to CR:
8104 (i) The sequence CR . CR does *not* terminate an incoming SMTP message,
8105 nor a local message in the state where . is a terminator.
8107 (ii) If a bare CR is encountered in a header line, an extra space is added
8108 after the line terminator so as not to end the header. The reasoning
8109 behind this is that bare CRs in header lines are most likely either
8110 to be mistakes, or people trying to play silly games.
8112 59. The size of a message, as listed by "-bp" or in the Exim monitor window,
8113 was being incorrectly given as 18 bytes larger than it should have been.
8114 This is a VOB (very old bug).
8116 60. This may never have affected anything current, but just in case it has:
8117 When the local host is found other than at the start of a list of hosts,
8118 the local host, those with the same MX, and any that follow, are discarded.
8119 When the list in question was part of a longer list of hosts, the following
8120 hosts (not currently being processed) were also being discarded. This no
8121 longer happens. I'm not sure if this situation could ever has previously
8124 61. Added the "/MX" feature to lists of hosts in the manualroute and query
8127 62. Whenever Exim generates a new message, it now adds an Auto-Submitted:
8128 header. This is something that is recommended in a new Internet Draft, and
8129 is something that is documented as being done by Sendmail. There are two
8130 possible values. For messages generated by the autoreply transport, Exim
8133 Auto-Submitted: auto-replied
8135 whereas for all other generated messages (e.g. bounces) it adds
8137 Auto-Submitted: auto-generated
8139 63. The "personal" condition in filters now includes a test for the
8140 Auto-Submitted: header. If it contains the string "auto-" the message it
8141 not considered personal.
8143 64. Added rcpt_include_affixes as a generic transport option.
8145 65. Added queue_only_override (default true).
8147 66. Added the syslog_duplication option.
8149 67. If what should have been the first header line of a message consisted of
8150 a space followed by a colon, Exim was mis-interpreting it as a header line.
8151 It isn't of course - it is syntactically invalid and should therefore be
8152 treated as the start of the message body. The misbehaviour could have
8153 caused a number of strange effects, including loss of data in subsequent
8154 header lines, and spool format errors.
8156 68. Formerly, the AUTH parameter on a MAIL command was trusted only if the
8157 client host had authenticated. This control can now be exercised by an ACL
8158 for more flexibility.
8160 69. By default, callouts do not happen when testing with -bh. There is now a
8161 variant, -bhc, which does actually run the callout code, including
8162 consulting and updating the callout cache.
8164 70. Added support for saslauthd authentication, courtesy of Alexander
8167 71. If statvfs() failed on the spool or log directories while checking their
8168 size for availability, Exim confusingly gave the error "space shortage".
8169 Furthermore, in debugging mode it crashed with a floating point exception.
8170 These checks are done if check_{spool,log}_{space,inodes} are set, and when
8171 an SMTP message arrives with SIZE= on the MAIL command. As this is a really
8172 serious problem, Exim now writes to the main and panic logs when this
8173 happens, with details of the failure. It then refuses to accept the
8174 incoming message, giving the message "spool directory problem" or "log
8175 directory problem" with a 421 code for SMTP messages.
8177 72. When Exim is about to re-exec itself, it ensures that the file descriptors
8178 0, 1, and 2 exist, because some OS complain for execs without them (see
8179 ChangeLog 4.05/30). If necessary, Exim opens /dev/null to use for these
8180 descriptors. However, the code omitted to check that the open succeeded,
8181 causing mysterious errors if for some reason the permissions on /dev/null
8182 got screwed. Now Exim writes a message to the main and panic logs, and
8183 bombs out if it can't open /dev/null.
8185 73. Re-vamped the way daemon_smtp_port, local_interfaces, and -oX work and
8186 interact so that it is all more flexible. It is supposed to remain
8187 backwards compatible. Also added extra_local_interfaces.
8189 74. Invalid data sent to a SPA (NTLM) server authenticator could cause the code
8190 to bomb out with an assertion failure - to the client this appears as a
8191 connection drop. This problem occurs in the part of the code that was taken
8192 from the Samba project. Fortunately, the assertion is in a very simple
8193 function, so I have fixed this by reproducing the function inline in the
8194 one place where it is called, and arranging for authentication to fail
8195 instead of killing the process with assert().
8197 75. The SPA client code was not working when the server requested OEM rather
8198 than Unicode encoding.
8200 76. Added code to make require_files with a specific uid setting more usable in
8201 the case where statting the file as root fails - usually a non-root-mounted
8202 NFS file system. When this happens and the failure is EACCES, Exim now
8203 forks a subprocess and does the per-uid checking as the relevant uid.
8205 77. Added process_log_path.
8207 78. If log_file_path was not explicitly set, a setting of check_log_space or
8208 check_log_inodes was ignored.
8210 79. If a space check for the spool or log partitions fails, the incident is now
8211 logged. Of course, in the latter case the data may get lost...
8213 80. Added the %p formatting code to string_format() so that it can be used to
8214 print addresses in debug_print(). Adjusted all the address printing in the
8215 debugging in store.c to use %p rather than %d.
8217 81. There was a concern that a line of code in smtp_in.c could overflow a
8218 buffer if a HELO/EHLO command was given followed by 500 or so spaces. As
8219 initially expressed, the concern was not well-founded, because trailing
8220 spaces are removed early. However, if the trailing spaces were followed by
8221 a NULL, they did not get removed, so the overflow was possible. Two fixes
8224 (a) I re-wrote the offending code in a cleaner fashion.
8225 (b) If an incoming SMTP command contains a NULL character, it is rejected
8228 82. When Exim changes uid/gid to the Exim user at daemon start time, it now
8229 runs initgroups(), so that if the Exim user is in any additional groups,
8230 they will be used during message reception.
8236 The change log for 4.20 and earlier releases has been archived.
git://git.exim.org / exim.git / blob