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 The hosts_connection_nolog main option now also controls "no MAIL in
9 SMTP connection" log lines.
11 JH/02 Option default value updates:
12 - queue_fast_ramp (main) true (was false)
13 - remote_max_parallel (main) 4 (was 2)
15 JH/03 Cache static regex pattern compilations, for use by ACLs.
17 JH/04 Bug 2903: avoid exit on an attempt to rewrite a malformed address.
18 Make the rewrite never match and keep the logging. Trust the
19 admin to be using verify=header-syntax (to actually reject the message).
21 JH/05 Follow symlinks for placing a watch on TLS creds files. This means
22 (under Linux) we watch the dir containing the final file; previously
23 it would be the dir with the first symlink. We still do not monitor
26 JH/06 Check for bad chars in rDNS for sender_host_name. The OpenBSD (at least)
27 dn_expand() is happy to pass them through.
29 JH/07 OpenSSL Fix auto-reload of changed server OCSP proof. Previously, if
30 the file with the proof had an unchanged name, the new proof(s) were
31 loaded on top of the old ones (and nover used; the old ones were stapled).
33 JH/08 Bug 2915: Fix use-after-free for $regex<n> variables. Previously when
34 more than one message arrived in a single connection a reference from
35 the earlier message could be re-used. Often a sigsegv resulted.
36 These variables were introduced in Exim 4.87.
37 Debug help from Graeme Fowler.
39 JH/09 Fix ${filter } for conditions that modify $value. Previously the
40 modified version would be used in construction the result, and a memory
43 JH/10 GnuTLS: fix for (IOT?) clients offering no TLS extensions at all.
44 Find and fix by Jasen Betts.
46 JH/11 OpenSSL: fix for ancient clients needing TLS support for versions earlier
47 than TLSv1,2, Previously, more-recent versions of OpenSSL were permitting
48 the systemwide configuration to override the Exim config.
50 HS/01 Bug 2728: Introduce EDITME option "DMARC_API" to work around incompatible
51 API changes in libopendmarc.
53 JH/12 Bug 2930: Fix daemon startup. When started from any process apart from
54 pid 1, in the normal "background daemon" mode, having to drop process-
55 group leadership also lost track of needing to create listener sockets.
57 JH/13 Bug 2929: Fix using $recipients after ${run...}. A change made for 4.96
58 resulted in the variable appearing empty. Find and fix by Ruben Jenster.
60 JH/14 Bug 2933: Fix regex substring match variables for null matches. Since 4.96
61 a capture group which obtained no text (eg. "(abc)*" matching zero
62 occurrences) could cause a segfault if the corresponding $<n> was
65 JH/15 Fix argument parsing for ${run } expansion. Previously, when an argument
66 included a close-brace character (eg. it itself used an expansion) an
69 JH/16 Move running the smtp connect ACL to before, for TLS-on-connect ports,
70 starting TLS. Previously it was after, meaning that attackers on such
71 ports had to be screened using the host_reject_connection main config
72 option. The new sequence aligns better with the STARTTLS behaviour, and
73 permits defences against crypto-processing load attacks, even though it
74 is strictly an incompatible change.
75 Also, avoid sending any SMTP fail response for either the connect ACL
76 or host_reject_connection, for TLS-on-connect ports.
78 JH/17 Permit the ACL "encrypted" condition to be used in a HELO/EHLO ACL,
79 Previously this was not permitted, but it makes reasonable sense.
80 While there, restore a restriction on using it from a connect ACL; given
81 the change JH/16 it could only return false (and before 4.91 was not
84 JH/18 Fix a fencepost error in logging. Previously (since 4.92) when a log line
85 was exactly sized compared to the log buffer, a crash occurred with the
86 misleading message "bad memory reference; pool not found".
87 Found and traced by Jasen Betts.
89 JH/19 Bug 2911: Fix a recursion in DNS lookups. Previously, if the main option
90 dns_again_means_nonexist included an element causing a DNS lookup which
91 iteslf returned DNS_AGAIN, unbounded recursion occurred. Possible results
92 included (though probably not limited to) a process crash from stack
93 memory limit, or from excessive open files. Replace this with a paniclog
94 whine (as this is likely a configuration error), and returning
97 JH/20 Bug 2954: (OpenSSL) Fix setting of explicit EC curve/group. Previously
98 this always failed, probably leading to the usual downgrade to in-clear
101 JH/21 Fix TLSA lookups. Previously dns_again_means_nonexist would affect
102 SERVFAIL results, which breaks the downgrade resistance of DANE. Change
103 to not checking that list for these lookups.
105 JH/22 Bug 2434: Add connection-elapsed "D=" element to more connection
108 JH/23 Fix crash in string expansions. Previously, if an empty variable was
109 immediately followed by an expansion operator, a null-indirection read
110 was done, killing the process.
112 JH/24 Bug 2997: When built with EXPERIMENTAL_DSN_INFO, bounce messages can
113 include an SMTP response string which is longer than that supported
114 by the delivering transport. Alleviate by wrapping such lines before
117 JH/25 Bug 2827: Restrict size of References: header in bounce messages to 998
118 chars (RFC limit). Previously a limit of 12 items was made, which with
119 a not-impossible References: in the message being bounced could still
120 be over-large and get stopped in the transport.
122 JH/26 For a ${readsocket } in TLS mode, send a TLS Close Alert before the TCP
123 close. Previously a bare socket close was done.
125 JH/27 Fix ${srs_encode ..}. Previously it would give a bad result for one day
132 JH/01 Move the wait-for-next-tick (needed for unique message IDs) from
133 after reception to before a subsequent reception. This should
134 mean slightly faster delivery, and also confirmation of reception
137 JH/02 Move from using the pcre library to pcre2. The former is no longer
138 being developed or supported (by the original developer).
140 JH/03 Constification work in the filters module required a major version
141 bump for the local-scan API. Specifically, the "headers_charset"
142 global which is visible via the API is now const and may therefore
143 not be modified by local-scan code.
145 JH/04 Fix ClamAV TCP use under FreeBSD. Previously the OS-specific shim for
146 sendfile() didi not account for the way the ClamAV driver code called it.
148 JH/05 Bug 2819: speed up command-line messages being read in. Previously a
149 time check was being done for every character; replace that with one
152 JH/06 Bug 2815: Fix ALPN sent by server under OpenSSL. Previously the string
153 sent was prefixed with a length byte.
155 JH/07 Change the SMTP feature name for pipelining connect to be compliant with
156 RFC 5321. Previously Dovecot (at least) would log errors during
159 JH/08 Remove stripping of the binaries from the FreeBSD build. This was added
160 in 4.61 without a reason logged. Binaries will be bigger, which might
161 matter on diskspace-constrained systems, but debug is easier.
163 JH/09 Fix macro-definition during "-be" expansion testing. The move to
164 write-protected store for macros had not accounted for these runtime
165 additions; fix by removing this protection for "-be" mode.
167 JH/10 Convert all uses of select() to poll(). FreeBSD 12.2 was found to be
168 handing out large-numbered file descriptors, violating the usual Unix
169 assumption (and required by Posix) that the lowest possible number will be
170 allocated by the kernel when a new one is needed. In the daemon, and any
171 child procesees, values higher than 1024 (being bigger than FD_SETSIZE)
172 are not useable for FD_SET() [and hence select()] and overwrite the stack.
173 Assorted crashes happen.
175 JH/11 Fix use of $sender_host_name in daemon process. When used in certain
176 main-section options or in a connect ACL, the value from the first ever
177 connection was never replaced for subsequent connections. Found by
180 JH/12 Bug 2838: Fix for i32lp64 hard-align platforms. Found for SPARC Linux,
181 though only once PCRE2 was introduced: the memory accounting used under
182 debug offset allocations by an int, giving a hard trap in early startup.
183 Change to using a size_t. Debug and fix by John Paul Adrian Glaubitz.
185 JH/13 Bug 2845: Fix handling of tls_require_ciphers for OpenSSL when a value
186 with underbars is given. The write-protection of configuration introduced
187 in 4.95 trapped when normalisation was applied to an option not needing
190 JH/14 Bug 1895: TLS: Deprecate RFC 5114 Diffie-Hellman parameters.
192 JH/15 Fix a resource leak in *BSD. An off-by-one error resulted in the daemon
193 failing to close the certificates directory, every hour or any time it
196 JH/16 Debugging initiated by an ACL control now continues through into routing
197 and transport processes. Previously debugging stopped any time Exim
198 re-execs, or for processing a queued message.
200 JH/17 The "expand" debug selector now gives more detail, specifically on the
201 result of expansion operators and items.
203 JH/18 Bug 2751: Fix include_directory in redirect routers. Previously a
204 bad comparison between the option value and the name of the file to
205 be included was done, and a mismatch was wrongly identified.
206 4.88 to 4.95 are affected.
208 JH/19 Support for Berkeley DB versions 1 and 2 is withdrawn.
210 JH/20 When built with NDBM for hints DB's check for nonexistence of a name
211 supplied as the db file-pair basename. Previously, if a directory
212 path was given, for example via the autoreply "once" option, the DB
213 file.pag and file.dir files would be created in that directory's
216 JH/21 Remove the "allow_insecure_tainted_data" main config option and the
217 "taint" log_selector. These were previously deprecated.
219 JH/22 Fix static address-list lookups to properly return the matched item.
220 Previously only the domain part was returned.
222 JH/23 Bug 2864: FreeBSD: fix transport hang after 4xx/5xx response. Previously
223 the call into OpenSSL to send a TLS Close was being repeated; this
224 resulted in the library waiting for the peer's Close. If that was never
225 sent we waited forever. Fix by tracking send calls.
227 JH/24 The ${run} expansion item now expands its command string elements after
228 splitting. Previously it was before; the new ordering makes handling
229 zero-length arguments simpler. The old ordering can be obtained by
230 appending a new option "preexpand", after a comma, to the "run".
232 JH/25 Taint-check exec arguments for transport-initiated external processes.
233 Previously, tainted values could be used. This affects "pipe", "lmtp" and
234 "queryprogram" transport, transport-filter, and ETRN commands.
235 The ${run} expansion is also affected: in "preexpand" mode no part of
236 the command line may be tainted, in default mode the executable name
239 JH/26 Fix CHUNKING on a continued-transport. Previously the usabliility of
240 the the facility was not passed across execs, and only the first message
241 passed over a connection could use BDAT; any further ones using DATA.
243 JH/27 Support the PIPECONNECT facility in the smtp transport when the helo_data
244 uses $sending_ip_address and an interface is specified.
245 Previously any use of the local address in the EHLO name disabled
246 PIPECONNECT, the common case being to use the rDNS of it.
248 JH/28 OpenSSL: fix transport-required OCSP stapling verification under session
249 resumption. Previously verify failed because no certificate status is
250 passed on the wire for the restarted session. Fix by using the recorded
251 ocsp status of the stored session for the new connection.
253 JH/29 TLS resumption: the key for session lookup in the client now includes
254 more info that a server could potentially use in configuring a TLS
255 session, avoiding oferring mismatching sessions to such a server.
256 Previously only the server IP was used.
258 JH/30 Fix string_copyn() for limit greater than actual string length.
259 Previously the copied amount was the limit, which could result in a
260 overlapping memcpy for newly allocated destination soon after a
261 source string shorter than the limit. Found/investigated by KM.
263 JH/31 Bug 2886: GnuTLS: Do not free the cached creds on transport connection
264 close; it may be needed for a subsequent connection. This caused a
265 SEGV on primary-MX defer. Found/investigated by Gedalya & Andreas.
267 JH/32 Fix CHUNKING for a second message on a connection when the first was
268 rejected. Previously we did not reset the chunking-offered state, and
269 erroneously rejected the BDAT command. Investigation help from
272 JH/33 Fis ${srs_encode ...} to handle an empty sender address, now returning
273 an empty address. Previously the expansion returned an error.
275 HS/01 Bug 2855: Handle a v4mapped sender address given us by a frontending
276 proxy. Previously these were misparsed, leading to paniclog entries.
282 JH/01 Bug 1329: Fix format of Maildir-format filenames to match other mail-
283 related applications. Previously an "H" was used where available info
284 says that "M" should be, so change to match.
286 JH/02 Bug 2587: Fix pam expansion condition. Tainted values are commonly used
287 as arguments, so an implementation trying to copy these into a local
288 buffer was taking a taint-enforcement trap. Fix by using dynamically
289 created buffers. Similar fix for radius expansion condition.
291 JH/03 Bug 2586: Fix listcount expansion operator. Using tainted arguments is
292 reasonable, eg. to count headers. Fix by using dynamically created
293 buffers rather than a local. Do similar fixes for ACL actions "dcc",
294 "log_reject_target", "malware" and "spam"; the arguments are expanded
295 so could be handling tainted values.
297 JH/04 Bug 2590: Fix -bi (newaliases). A previous code rearrangement had
298 broken the (no-op) support for this sendmail command. Restore it
299 to doing nothing, silently, and returning good status.
301 JH/05 Bug 2593: Fix "vacation" in Exim filter. Previously, when a "once"
302 record path was given (or the default used) without a leading directory
303 path, an error occurred on trying to open it. Use the transport's working
306 JH/06 Bug 2594: Change the name used for certificate name checks in the smtp
307 transport. Previously it was the name on the DNS A-record; use instead
308 the head of the CNAME chain leading there (if there is one). This seems
309 to align better with RFC 6125.
311 JH/07 Bug 2597: Fix a resource leak. Using a lookup in obtaining a value for
312 smtp_accept_max_per_host allocated resources which were not released
313 when the limit was exceeded. This eventually crashed the daemon. Fix
314 by adding a release action in that path.
316 JH/08 Bug 2598: Fix verify ACL condition. The options for the condition are
317 expanded; previously using tainted values was rejected. Fix by using
318 dynamically-created buffers.
320 JH/09 Relax restrictions on ACL verify condition needing access to message
321 headers. Previously they were only permitted in data and non-smtp ACLs;
322 permit also mime, dkim, prdr quit and notquit. Applies to header-syntax,
323 not_blind, header_sender and header_names_ascii verification.
325 JH/10 Bug 2603: Fix coding of string copying to only evaluate arguments once.
326 Previously a macro used one argument twice; when called with the
327 argument as an expression having side-effects, incorrect operation
328 resulted. Use an inlineable function.
330 JH/11 Bug 2604: Fix request to cutthrough-deliver when a connection is already
331 held open for a verify callout. Previously this wan not accounted for
332 and a corrupt onward SMTP conversation resulted.
334 JH/12 Bug 2607: Fix the ${srs_encode } expansion to handle quoted local_parts.
335 Previously they were embedded naively in the constructed address; when
336 needed, strip the quoting and quote the entire local_part.
337 Also make the inbound_srs expansion condition handle quoting.
339 JH/13 Fix dsearch "subdir" filter to ignore ".". Previously only ".." was
340 excluded, not matching the documentation.
342 JH/14 Bug 2606: Fix a segfault in sqlite lookups. When no, or a bad, filename
343 was given for the sqlite_dbfile a trap resulted.
345 JH/15 Bug 2620: Fix "spam" ACL condition. Previously, tainted values for the
346 "name" argument resulted in a trap. There is no reason to disallow such;
347 this was a coding error.
349 JH/16 Bug 2615: Fix pause during message reception, on systems that have been
350 suspended/resumed. The Linux CLOCK_MONOTONIC does not account for time
351 spent suspended, ignoring the POSIX definition. Previously we assumed
352 it did and a constant offset from real time could be used as a correction.
353 Change to using the same clock source for the start-of-message and the
354 post-message next-tick-wait. Also change to using CLOCK_BOOTTIME if it
355 exists, just to get a clock slightly more aligned to reality.
357 JH/17 Bug 2295: Fix DKIM signing to always semicolon-terminate. Although the
358 RFC says it is optional some validators care. The missing char was not
359 intended but triggered by a line-wrap alignment. Discovery and fix by
360 Guillaume Outters, hacked on by JH.
362 JH/18 Bug 2617: Fix a taint trap in parse_fix_phrase(). Previously when the
363 name being quoted was tainted a trap would be taken. Fix by using
364 dynamically created buffers. The routine could have been called by a
365 rewrite with the "h" flag, by using the "-F" command-line option, or
366 by using a "name=" option on a control=submission ACL modifier.
368 JH/19 SPF: change the Authentication-Results expansion component to give
369 smtp.helo when the sender domain is empty. Previously it gave
372 JH/20 Bug 2631: ACL dnslist conditions now ignore and log any lookups returns
373 not in 127.0.0.0/8 to help in spotting list domains taken over by a
374 domain-parking registrar.
376 JH/21 Bug 2630: Fix eol-replacement string for the ${readsocket } expansion.
377 Previously when a whitespace character was specified it was not inserted
378 after removing the newline.
380 JH/22 Bug 2265: Force SNI usage for smtp transport DANE'd connections, to be
381 the domain part of the recipient address. This overrides any tls_sni
382 option set, which was previously used.
384 JH/23 Logging: with the +tls_sni log_selector, do not wrap the received SNI
387 JH/24 Bug 2634: Fix a taint trap seen on NetBSD: the testing coded for
388 is_tainted() had an off-by-one error in the overenthusiastic direction.
389 Find and fix by Gavan. Although NetBSD is not a supported platform for
390 4.94 this bug could affect other platforms.
392 PP/01 Fix default prime selection to be consistent.
393 One path used ike23 still, instead of exim.dev.20160529.3; now both
394 execution flows will use the same DH primes (currently
395 exim.dev.20160529.3).
397 JH/25 OpenSSL: Fix back-compatibility behaviour surrounding tls_certificates
398 option in smtp transport, to match the documentation. Previously
399 verification was not being done in some cases where it should have been.
401 JH/26 Bug 2646: fix a memory usage issue in ldap lookups. Previously, when more
402 than one server was defined and depending on the platform memory layout
403 details, an internal consistency trap could be hit while walking the list
406 JH/27 Bug 2648: fix the passing of an authenticator public-name through spool
407 files. The value is used by the authresults expansion item. Previously
408 if this was used in a router or transport, a crash could result.
410 JH/28 Fix spurious logging of select error. Some platforms, notably FreeBSD,
411 have a sufficient incidence of EINTR returns from select that an
412 interaction with other operations done by the main daemon loop exposed
413 a bug in the error-handling. This was benign apart from the log
416 JH/29 Bug 2675: add outgoing-interface I= element to deferred "==" log lines,
417 for consistency with delivered "=>" and failed "**" lines. While we're
418 there, handle PRX and TFO.
420 JH/30 Bug 2677: fix matching of long addresses. Since 4.93 a limit of 256 was
421 applied. This resulted, if any header-line rewrite rules were configured,
422 in a panic-log triggerable by sending a message with a long address in
423 a header. Fix by increasing the arbitrary limit to larger than a single
424 (dewrapped) 5322 header line maximum size.
426 JH/31 The ESMTP option name advertised for the SUPPORT_EARLY_PIPE build option
427 is changed from X_PIPE_CONNECT to PIPE_CONNECT. This is in line with
428 RFC 6648 which deprecates X- options in protocols as a general practice.
429 Changeover between the implementations is handled by the mechanisms
432 JH/32 Bug 2599: fix delay of delivery to a local address where there is also
433 a remote which uses callout/hold. Previously the local was queued.
435 JH/33 Fix a taint trap in the ${listextract } expansion when the source data
438 JH/34 Fix the placement of a multiple-message delivery marker in the delivery
439 log line. The asterisk is now consistently appended to the remote IP
440 (and port, if given), and will also be provided on defer and fail log
441 lines. Previously it could be placed on the local IP if that was being
442 logged, and was only provided on delivery lines.
444 JH/35 Bug 2343: Harden exim_tidydb against corrupt wait- files.
446 JH/36 Bug 2687: Fix interpretation of multiple ^ chars in a plaintext
447 authenticator client_send option. Previously the next char, after a pair
448 was collapsed, was taken verbatim (so ^^^foo became ^^foo; ^^^^foo became
449 ^^\x00foo). Fixed to get ^\x00foo and ^^foo respectively to match the
450 documentation. There is still no way to get a leading ^ immediately
451 after a NUL (ie. for the password of a PLAIN method authenticator.
453 JH/37 Enforce the expected size, for fixed-size records read from hints-DB
454 files. For bad sizes read, delete the record and whine to paniclog.
456 JH/38 When logging an AUTH failure, as server, do not include sensitive
457 information. Previously, the credentials would be included if given
458 as part of the AUTH command line and an ACL denied authentication.
460 JH/39 Bug 2691: fix $local_part_data. When the matching list element
461 referred to a file, bad data was returned. This likely also affected
464 JH/40 The gsasl authenticator now supports caching of the salted password
465 generated by the client-side implementation. This required the addition
466 of a new variable: $auth4.
468 JH/41 Fix daemon SIGHUP on FreeBSD. Previously, a named socket for IPC was
469 left undeleted; the attempt to re-create it then failed - resulting in
470 the usual "SIGHUP tp have daemon reload configuration" to not work.
471 This affected any platform not supporting "abstract" Unix-domain
472 sockets (i.e. not Linux).
474 JH/42 Bug 2693: Harden against a peer which reneges on a 452 "too many
475 recipients" response to RCPT in a later response, with a 250. The
476 previous coding assumed this would not happen, and under PIPELINING
477 would result in both lost and duplicate recipients for a message.
479 JH/43 Bug 2694: Fix weighted distribution of work to multiple spamd servers.
480 Previously the weighting was incorrectly applied. Similar fix for socks
481 proxies. Found and fixed by Heiko Schlichting.
483 JH/44 Bug 2701: Fix list-expansion of dns_ipv4_lookup. Previously, it did
484 not handle sub-lists included using the +namedlist syntax. While
485 investigating, the same found for dns_trust_aa, dns_again_means_nonexist,
486 dnssec_require_domains, dnssec_request_domains, srv_fail_domains,
489 JH/45 Use a (new) separate store pool-pair for DKIM verify working data.
490 Previously the permanent pool was used, so the sore could not be freed.
491 This meant a connection with many messages would use continually-growing
494 JH/46 Use an exponentially-increasing block size when malloc'ing store. Do it
495 per-pool so as not to waste too much space. Previously a constant size
496 was used which resulted in O(n^2) behaviour; now we get O(n log n) making
497 DOS attacks harder. The cost is wasted memory use in the larger blocks.
499 JH/47 Use explicit alloc/free for DNS lookup workspace. This permits using the
500 same space repeatedly, and a smaller process footprint.
502 JH/48 Use a less bogus-looking filename for a temporary used for DH-parameters
503 for GnuTLS. Previously the name started "%s" which, while not a bug,
504 looked as if if might be one.
506 JH/49 Bug 2710: when using SOCKS for additional messages after the first (a
507 "continued connection") make the $proxy_* variables available. Previously
508 the information was not passed across the exec() call for subsequent
509 transport executions. This also mean that the log lines for the
510 messages can show the proxy information.
512 JH/50 Bug 2672: QT elements in log lines, unless disabled, now exclude the
513 receive time. With modern systems the difference is significant.
514 The historical behaviour can be restored by disabling (a new) log_selector
515 "queue_time_exclusive".
517 JH/51 Taint-check ACL line. Previously, only filenames (for out-of-line ACL
518 content) were specifically tested for. Now, also cover expansions
519 resulting in ACL names and inline ACL content.
521 JH/52 Fix ${ip6norm:} operator. Previously, any trailing line text was dropped,
522 making it unusable in complex expressions.
524 JH/53 Bug 2743: fix immediate-delivery via named queue. Previously this would
525 fail with a taint-check on the spoolfile name, and leave the message
528 HS/01 Enforce absolute PID file path name.
530 HS/02 Handle SIGINT as we handle SIGTERM: terminate the Exim process.
532 PP/01 Add a too-many-bad-recipients guard to the default config's RCPT ACL.
534 PP/02 Bug 2643: Correct TLS DH constants.
535 A missing NUL termination in our code-generation tool had led to some
536 incorrect Diffie-Hellman constants in the Exim source.
537 Reported by kylon94, code-gen tool fix by Simon Arlott.
539 PP/03 Impose security length checks on various command-line options.
540 Fixes CVE-2020-SPRSS reported by Qualys.
542 PP/04 Fix Linux security issue CVE-2020-SLCWD and guard against PATH_MAX
543 better. Reported by Qualys.
545 PP/05 Fix security issue CVE-2020-PFPSN and guard against cmdline invoker
546 providing a particularly obnoxious sender full name.
549 PP/06 Fix CVE-2020-28016 (PFPZA): Heap out-of-bounds write in parse_fix_phrase()
551 PP/07 Refuse to allocate too little memory, block negative/zero allocations.
554 PP/08 Change default for recipients_max from unlimited to 50,000.
556 PP/09 Fix security issue with too many recipients on a message (to remove a
557 known security problem if someone does set recipients_max to unlimited,
558 or if local additions add to the recipient list).
559 Fixes CVE-2020-RCPTL reported by Qualys.
561 PP/10 Fix security issue in SMTP verb option parsing
562 Fixes CVE-2020-EXOPT reported by Qualys.
564 PP/11 Fix security issue in BDAT state confusion.
565 Ensure we reset known-good where we know we need to not be reading BDAT
566 data, as a general case fix, and move the places where we switch to BDAT
567 mode until after various protocol state checks.
568 Fixes CVE-2020-BDATA reported by Qualys.
570 HS/03 Die on "/../" in msglog file names
572 QS/01 Creation of (database) files in $spool_dir: only uid=0 or the uid of
573 the Exim runtime user are allowed to create files.
575 QS/02 PID file creation/deletion: only possible if uid=0 or uid is the Exim
578 QS/03 When reading the output from interpreted forward files we do not
579 pass the pipe between the parent and the interpreting process to
580 executed child processes (if any).
582 QS/04 Always die if requested from internal logging, even is logging is
585 JH/54 DMARC: recent versions of the OpenDMARC library appear to have broken
586 the API; compilation noo longer completes with DMARC support included.
587 This affects 1.4.1-1 on Fedora 33 (1.3.2-3 is functional); and has
588 been reported on other platforms.
590 JH/55 TLS: as server, reject connections with ALPN indicating non-smtp use.
592 JH/56 Make the majority of info read from config files readonly, for defence-in-
593 depth against exploits. Suggestion by Qualys.
594 Not supported on Solaris 10.
596 JH/57 Fix control=fakreject for a custom message containing tainted data.
597 Previously this resulted in a log complaint, due to a re-expansion present
598 since fakereject was originally introduced.
600 JH/58 GnuTLS: Fix certextract expansion. If a second modifier after a tag
601 modifier was given, a loop resulted.
603 JH/59 DKIM: Fix small-message verification under TLS with chunking. If a
604 pipelined SMTP command followed the BDAT LAST then it would be
605 incorrectly treated as part of the message body, causing a verification
608 JH/60 Bug 2805: Fix logging of domain-literals in Message_ID: headers. They
609 require looser validation rules than those for 821-level addresses,
610 which only permit IP addresses.
616 JH/01 Avoid costly startup code when not strictly needed. This reduces time
617 for some exim process initialisations. It does mean that the logging
618 of TLS configuration problems is only done for the daemon startup.
620 JH/02 Early-pipelining support code is now included unless disabled in Makefile.
622 JH/03 DKIM verification defaults no long accept sha1 hashes, to conform to
623 RFC 8301. They can still be enabled, using the dkim_verify_hashes main
626 JH/04 Support CHUNKING from an smtp transport using a transport_filter, when
627 DKIM signing is being done. Previously a transport_filter would always
628 disable CHUNKING, falling back to traditional DATA.
630 JH/05 Regard command-line recipients as tainted.
632 JH/06 Bug 340: Remove the daemon pid file on exit, when due to SIGTERM.
634 JH/07 Bug 2489: Fix crash in the "pam" expansion condition. It seems that the
635 PAM library frees one of the arguments given to it, despite the
636 documentation. Therefore a plain malloc must be used.
638 JH/08 Bug 2491: Use tainted buffers for the transport smtp context. Previously
639 on-stack buffers were used, resulting in a taint trap when DSN information
640 copied from a received message was written into the buffer.
642 JH/09 Bug 2493: Harden ARC verify against Outlook, whick has been seen to mix
643 the ordering of its ARC headers. This caused a crash.
645 JH/10 Bug 2492: Use tainted memory for retry record when needed. Previously when
646 a new record was being constructed with information from the peer, a trap
649 JH/11 Bug 2494: Unset the default for dmarc_tld_file. Previously a naiive
650 installation would get error messages from DMARC verify, when it hit the
651 nonexistent file indicated by the default. Distros wanting DMARC enabled
652 should both provide the file and set the option.
653 Also enforce no DMARC verification for command-line sourced messages.
655 JH/12 Fix an uninitialised flag in early-pipelining. Previously connections
656 could, depending on the platform, hang at the STARTTLS response.
658 JH/13 Bug 2498: Reset a counter used for ARC verify before handling another
659 message on a connection. Previously if one message had ARC headers and
660 the following one did not, a crash could result when adding an
661 Authentication-Results: header.
663 JH/14 Bug 2500: Rewind some of the common-coding in string handling between the
664 Exim main code and Exim-related utities. The introduction of taint
665 tracking also did many adjustments to string handling. Since then, eximon
666 frequently terminated with an assert failure.
668 JH/15 When PIPELINING, synch after every hundred or so RCPT commands sent and
669 check for 452 responses. This slightly helps the inefficieny of doing
670 a large alias-expansion into a recipient-limited target. The max_rcpt
671 transport option still applies (and at the current default, will override
672 the new feature). The check is done for either cause of synch, and forces
673 a fast-retry of all 452'd recipients using a new MAIL FROM on the same
674 connection. The new facility is not tunable at this time.
676 JH/16 Fix the variables set by the gsasl authenticator. Previously a pointer to
677 library live data was being used, so the results became garbage. Make
678 copies while it is still usable.
680 JH/17 Logging: when the deliver_time selector ise set, include the DT= field
681 on delivery deferred (==) and failed (**) lines (if a delivery was
682 attemtped). Previously it was only on completion (=>) lines.
684 JH/18 Authentication: the gsasl driver not provides the $authN variables in time
685 for the expansion of the server_scram_iter and server_scram_salt options.
687 WB/01 SPF: DNS lookups for the obsolete SPF RR type done by the libspf2 library
688 are now specifically given a NO_DATA response without hitting the system
689 resolver. The library goes on to do the now-standard TXT lookup.
690 Use of dnsdb lookups is not affected.
692 JH/19 Bug 2507: Modules: on handling a dynamic-module (lookups) open failure,
693 only retrieve the errormessage once. Previously two calls to dlerror()
694 were used, and the second one (for mainlog/paniclog) retrieved null
697 JH/20 Taint checking: disallow use of tainted data for
698 - the appendfile transport file and directory options
699 - the pipe transport command
700 - the autoreply transport file, log and once options
701 - file names used by the redirect router (including filter files)
703 - paths used by single-key lookups
704 Previously this was permitted.
706 JH/21 Bug 2501: Fix init call in the heimdal authenticator. Previously it
707 adjusted the size of a major service buffer; this failed because the
708 buffer was in use at the time. Change to a compile-time increase in the
709 buffer size, when this authenticator is compiled into exim.
711 JH/22 Taint-checking: move to safe-mode taint checking on all platforms. The
712 previous fast-mode was untenable in the face of glibs using mmap to
713 support larger malloc requests.
715 PP/01 Update the openssl_options possible values through OpenSSL 1.1.1c.
716 New values supported, if defined on system where compiled:
717 allow_no_dhe_kex, cryptopro_tlsext_bug, enable_middlebox_compat,
718 no_anti_replay, no_encrypt_then_mac, prioritize_chacha, tlsext_padding
720 JH/23 Performance improvement in the initial phase of a two-pass queue run. By
721 running a limited number of proceses in parallel, a benefit is gained. The
722 amount varies with the platform hardware and load. The use of the option
723 queue_run_in_order means we cannot do this, as ordering becomes
726 JH/24 Bug 2524: fix the cyrus_sasl auth driver gssapi usage. A previous fix
727 had introduced a string-copy (for ensuring NUL-termination) which was not
728 appropriate for that case, which can include embedded NUL bytes in the
729 block of data. Investigation showed the copy to actually be needless, the
730 data being length-specified.
732 JH/25 Fix use of concurrent TLS connections under GnuTLS. When a callout was
733 done during a receiving connection, and both used TLS, global info was
734 used rather than per-connection info for tracking the state of data
735 queued for transmission. This could result in a connection hang.
737 JH/26 Fix use of the SIZE parameter on MAIL commands, on continued connections.
738 Previously, when delivering serveral messages down a single connection
739 only the first would provide a SIZE. This was due to the size information
740 not being properly tracked.
742 JH/27 Bug 2530: When operating in a timezone with sub-minute offset, such as
743 TAI (at 37 seconds currently), pretend to be in UTC for time-related
744 expansion and logging. Previously, spurious values such as a future
745 minute could be seen.
747 JH/28 Bug 2533: Fix expansion of ${tr } item. When called in some situations
748 it could crash from a null-deref. This could also affect the
749 ${addresses: } operator and ${readsock } item.
751 JH/29 Bug 2537: Fix $mime_part_count. When a single connection had a non-mime
752 message following a mime one, the variable was not reset.
754 JH/30 When an pipelined-connect fails at the first response, assume incorrect
755 cached capability (perhaps the peer reneged?) and immediately retry in
758 JH/31 Fix spurious detection of timeout while writing to transport filter.
760 JH/32 Bug 2541: Fix segfault on bad cmdline -f (sender) argument. Previously
761 an attempt to copy the string was made before checking it.
763 JH/33 Fix the dsearch lookup to return an untainted result. Previously the
764 taint of the lookup key was maintained; we now regard the presence in the
765 filesystem as sufficient validation.
767 JH/34 Fix the readsocket expansion to not segfault when an empty "options"
768 argument is supplied.
770 JH/35 The dsearch lookup now requires that the directory is an absolute path.
771 Previously this was not checked, and nonempty relative paths made an
772 access under Exim's current working directory.
774 JH/36 Bug 2554: Fix msg:defer event for the hosts_max_try_hardlimit case.
775 Previously no event was raised.
777 JH/37 Bug 2552: Fix the check on spool space during reception to use the SIZE
778 parameter supplied by the sender MAIL FROM command. Previously it was
779 ignored, and only the check_spool_space option value for the required
782 JH/38 Fix $dkim_key_length. This should, after a DKIM verification, present
783 the size of the signing public-key. Previously it was instead giving
784 the size of the signature hash.
786 JH/39 DKIM verification: the RFC 8301 restriction on sizes of RSA keys is now
787 the default. See the (new) dkim_verify_min_keysizes option.
789 JH/40 Fix a memory-handling bug: when a connection carried multiple messages
790 and an ACL use a lookup for checking either the local_part or domain,
791 stale data could be accessed. Ensure that variable references are
792 dropped between messages.
794 JH/41 Bug 2571: Fix SPA authenticator. Running as a server, an offset supplied
795 by the client was not checked as pointing within response data before
796 being used. A malicious client could thus cause an out-of-bounds read and
797 possibly gain authentication. Fix by adding the check.
799 JH/42 Internationalisation: change the default for downconversion in the smtp
800 transport to be "if needed". Previously it was "as previously set" for
801 the message, which usually meant "if needed" for message-submission but
802 "no" for everything else. However, MTAs have been seen using SMTPUTF8
803 even when the envelope addresses did not need it, resulting in forwarding
804 failures to non-supporting MTAs. A downconvert in such cases will be
805 a no-op on the addresses, merely dropping the use of SMTPUTF8 by the
806 transport. The change does mean that addresses needing conversion will
807 be converted when previously a delivery failure would occur.
809 JH/43 Fix possible long line in DSN. Previously when a very long SMTP error
810 response was received it would be used unchecked in a fail-DSN, violating
811 standards on line-length limits. Truncate if needed.
813 HS/01 Remove parameters of the link to www.open-spf.org. The linked form
814 doesn't work. (Additionally add a new main config option to configure the
821 JH/01 OpenSSL: With debug enabled output keying information sufficient, server
822 side, to decode a TLS 1.3 packet capture.
824 JH/02 OpenSSL: Suppress the sending of (stateful) TLS1.3 session tickets.
825 Previously the default library behaviour applied, sending two, each in
828 JH/03 Debug output for ACL now gives the config file name and line number for
831 JH/04 The default received_header_text now uses the RFC 8314 tls cipher clause.
833 JH/05 DKIM: ensure that dkim_domain elements are lowercased before use.
835 JH/06 Fix buggy handling of autoreply bounce_return_size_limit, and a possible
836 buffer overrun for (non-chunking) other transports.
838 JH/07 GnuTLS: Our use of late (post-handshake) certificate verification, under
839 TLS1.3, means that a server rejecting a client certificate is not visible
840 to the client until the first read of encrypted data (typically the
841 response to EHLO). Add detection for that case and treat it as a failed
842 TLS connection attempt, so that the normal retry-in-clear can work (if
843 suitably configured).
845 JB/01 Bug 2375: fix expansions of 822 addresses having comments in local-part
846 and/or domain. Found and fixed by Jason Betts.
848 JH/08 Add hardening against SRV & TLSA lookups the hit CNAMEs (a nonvalid
849 configuration). If a CNAME target was not a wellformed name pattern, a
852 JH/09 Logging: Fix initial listening-on line for multiple ports for an IP when
853 the OS reports them interleaved with other addresses.
855 JH/10 OpenSSL: Fix aggregation of messages. Previously, when PIPELINING was
856 used both for input and for a verify callout, both encrypted, SMTP
857 responses being sent by the server could be lost. This resulted in
858 dropped connections and sometimes bounces generated by a peer sending
861 JH/11 Harden plaintext authenticator against a badly misconfigured client-send
862 string. Previously it was possible to cause undefined behaviour in a
863 library routine (usually a crash). Found by "zerons".
865 JH/12 Bug 2384: fix "-bP smtp_receive_timeout". Previously it returned no
868 JH/13 Bug 2386: Fix builds with Dane under LibreSSL 2.9.0 onward. Some old
869 API was removed, so update to use the newer ones.
871 JH/14 Bug 1891: Close the log file if receiving a non-smtp message, without
872 any timeout set, is taking a long time. Previously we would hang on to a
873 rotated logfile "forever" if the input was arriving with long gaps
874 (a previous attempt to fix addressed lack, for a long time, of initial
877 HS/01 Bug 2390: Use message_id for tempfile creation to avoid races in a
878 shared (NFS) environment. The length of the tempfile name is now
879 4 + 16 ("hdr.$message_exim_id") which might break on file
880 systems which restrict the file name length to lower values.
883 HS/02 Bug 2390: Use message_id for tempfile creation to avoid races in a
884 shared (NFS) environment.
886 HS/03 Bug 2392: exigrep does case sensitive *option* processing (as it
887 did for all versions <4.90). Notably -M, -m, --invert, -I may be
890 JH/15 Use unsigned when creating bitmasks in macros, to avoid build errors
891 on some platforms for bit 31.
893 JH/16 GnuTLS: rework ciphersuite strings under recent library versions. Thanks
894 to changes apparently associated with TLS1.3 handling some of the APIs
895 previously used were either nonfunctional or inappropriate. Strings
896 like TLS1.3:ECDHE_SECP256R1__RSA_PSS_RSAE_SHA256__AES_256_GCM__AEAD:256
897 and TLS1.2:ECDHE_SECP256R1__RSA_SHA256__AES_128_CBC__SHA256:128 replace
898 the previous TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256 .
899 This affects log line X= elements, the $tls_{in,out}_cipher variables,
900 and the use of specific cipher names in the encrypted= ACL condition.
902 JH/17 OpenSSL: the default openssl_options now disables ssl_v3.
904 JH/18 GnuTLS: fix $tls_out_ocsp under hosts_request_ocsp. Previously the
905 verification result was not updated unless hosts_require_ocsp applied.
907 JH/19 Bug 2398: fix listing of a named-queue. Previously, even with the option
908 queue_list_requires_admin set to false, non-admin users were denied the
911 JH/20 Bug 2389: fix server advertising of usable certificates, under GnuTLS in
912 directory-of-certs mode. Previously they were advertised despite the
915 JH/21 The smtp transport option "hosts_noproxy_tls" is now unset by default.
916 A single TCP connection by a client will now hold a TLS connection open
917 for multiple message deliveries, by default. Previously the default was to
920 JH/22 The smtp transport option "hosts_try_dane" now enables all hosts by
921 default. If built with the facility, DANE will be used. The facility
922 SUPPORT_DANE is now enabled in the prototype build Makefile "EDITME".
924 JH/23 The build default is now for TLS to be included; the SUPPORT_TLS define
925 is replaced with DISABLE_TLS. Either USE_GNUTLS or (the new) USE_OPENSSL
926 must be defined and you must still, unless you define DISABLE_TLS, manage
927 the the include-dir and library-file requirements that go with that
928 choice. Non-TLS builds are still supported.
930 JH/24 Fix duplicated logging of peer name/address, on a transport connection-
933 JH/25 The smtp transport option "hosts_try_fastopen" now enables all hosts by
934 default. If the platform supports and has the facility enabled, it will
935 be requested on all coneections.
937 JH/26 The PIPE_CONNECT facility is promoted from experimental status and is now
938 controlled by the build-time option SUPPORT_PIPE_CONNECT.
940 PP/01 Unbreak heimdal_gssapi, broken in 4.92.
942 JH/27 Bug 2404: Use the main-section configuration option "dsn_from" for
943 success-DSN messages. Previously the From: header was always the default
944 one for these; the option was ignored.
946 JH/28 Fix the timeout on smtp response to apply to the whole response.
947 Previously it was reset for every read, so a teergrubing peer sending
948 single bytes within the time limit could extend the connection for a
949 long time. Credit to Qualsys Security Advisory Team for the discovery.
951 JH/29 Fix DSN Final-Recipient: field. Previously it was the post-routing
952 delivery address, which leaked information of the results of local
953 forwarding. Change to the original envelope recipient address, per
956 JH/30 Bug 2411: Fix DSN generation when RFC 3461 failure notification is
957 requested. Previously not bounce was generated and a log entry of
958 error ignored was made.
960 JH/31 Avoid re-expansion in ${sort } expansion. (CVE-2019-13917)
962 JH/32 Introduce a general tainting mechanism for values read from the input
963 channel, and values derived from them. Refuse to expand any tainted
964 values, to catch one form of exploit.
966 JH/33 Bug 2413: Fix dkim_strict option. Previously the expansion result
967 was unused and the unexpanded text used for the test. Found and
968 fixed by Ruben Jenster.
970 JH/34 Fix crash after TLS shutdown. When the TCP/SMTP channel was left open,
971 an attempt to use a TLS library read routine dereffed a nul pointer,
974 JH/35 Bug 2409: filter out-of-spec chars from callout response before using
975 them in our smtp response.
977 JH/36 Have the general router option retry_use_local_part default to true when
978 any of the restrictive preconditions are set (to anything). Previously it
979 was only for check_local user. The change removes one item of manual
980 configuration which is required for proper retries when a remote router
981 handles a subset of addresses for a domain.
983 JH/37 Appendfile: when evaluating quota use (non-quota_size_regex) take the file
984 link count into consideration.
986 HS/04 Fix handling of very log lines in -H files. If a -<key> <value> line
987 caused the extension of big_buffer, the following lines were ignored.
989 JH/38 Bug 1395: Teach the DNS negative-cache about TTL value from the SOA in
990 accordance with RFC 2308. Previously there was no expiry, so a longlived
991 receive process (eg. due to ACL delays) versus a short SOA value could
994 HS/05 Handle trailing backslash gracefully. (CVE-2019-15846)
996 JH/39 Promote DMARC support to mainline.
998 JH/40 Bug 2452: Add a References: header to DSNs.
1000 JH/41 With GnuTLS 3.6.0 (and later) do not attempt to manage Diffie-Hellman
1001 parameters. The relevant library call is documented as "Deprecated: This
1002 function is unnecessary and discouraged on GnuTLS 3.6.0 or later. Since
1003 3.6.0, DH parameters are negotiated following RFC7919."
1005 HS/06 Change the default of dnssec_request_domains to "*"
1007 JH/42 Bug 2545: Fix CHUNKING for all RCPT commands rejected. Previously we
1008 carried on and emitted a BDAT command, even when PIPELINING was not
1011 JH/43 Bug 2465: Fix taint-handling in dsearch lookup. Previously a nontainted
1012 buffer was used for the filename, resulting in a trap when tainted
1013 arguments (eg. $domain) were used.
1015 JH/44 With OpenSSL 1.1.1 (onwards) disable renegotiation for TLS1.2 and below;
1016 recommended to avoid a possible server-load attack. The feature can be
1017 re-enabled via the openssl_options main cofiguration option.
1019 JH/45 local_scan API: documented the current smtp_printf() call. This changed
1020 for version 4.90 - adding a "more data" boolean to the arguments.
1021 Bumped the ABI version number also, this having been missed previously;
1022 release versions 4.90 to 4.92.3 inclusive were effectively broken in
1023 respect of usage of smtp_printf() by either local_scan code or libraries
1024 accessed via the ${dlfunc } expansion item. Both will need coding
1025 adjustment for any calls to smtp_printf() to match the new function
1026 signature; a FALSE value for the new argument is always safe.
1028 JH/46 FreeBSD: fix use of the sendfile() syscall. The shim was not updating
1029 the file-offset (which the Linux syscall does, and exim expects); this
1030 resulted in an indefinite loop.
1032 JH/47 ARC: fix crash in signing, triggered when a configuration error failed
1033 to do ARC verification. The Authentication-Results: header line added
1034 by the configuration then had no ARC item.
1036 JH/48 Bug 2784: fix shutdown=no in the ${readsocket) expansion item. Previously
1037 an incorrect mode was used for reading the result, resulting in it being
1044 JH/01 Remove code calling the customisable local_scan function, unless a new
1045 definition "HAVE_LOCAL_SCAN=yes" is present in the Local/Makefile.
1047 JH/02 Bug 1007: Avoid doing logging from signal-handlers, as that can result in
1048 non-signal-safe functions being used.
1050 JH/03 Bug 2269: When presented with a received message having a stupidly large
1051 number of DKIM-Signature headers, disable DKIM verification to avoid
1052 a resource-consumption attack. The limit is set at twenty.
1054 JH/04 Add variables $arc_domains, $arc_oldest_pass for ARC verify. Fix the
1055 report of oldest_pass in ${authres } in consequence, and separate out
1056 some descriptions of reasons for verification fail.
1058 JH/05 Bug 2273: Cutthrough delivery left a window where the received messsage
1059 files in the spool were present and unlocked. A queue-runner could spot
1060 them, resulting in a duplicate delivery. Fix that by doing the unlock
1061 after the unlink. Investigation by Tim Stewart. Take the opportunity to
1062 add more error-checking on spoolfile handling while that code is being
1065 PP/01 Refuse to open a spool data file (*-D) if it's a symlink.
1066 No known attacks, no CVE, this is defensive hardening.
1068 JH/06 Bug 2275: The MIME ACL unlocked the received message files early, and
1069 a queue-runner could start a delivery while other operations were ongoing.
1070 Cutthrough delivery was a common victim, resulting in duplicate delivery.
1071 Found and investigated by Tim Stewart. Fix by using the open message data
1072 file handle rather than opening another, and not locally closing it (which
1073 releases a lock) for that case, while creating the temporary .eml format
1074 file for the MIME ACL. Also applies to "regex" and "spam" ACL conditions.
1076 JH/07 Bug 177: Make a random-recipient callout success visible in ACL, by setting
1077 $sender_verify_failure/$recipient_verify_failure to "random".
1079 JH/08 When generating a selfsigned cert, use serial number 1 since zero is not
1082 JH/09 Bug 2274: Fix logging of cmdline args when starting in an unlinked cwd.
1083 Previously this would segfault.
1085 JH/10 Fix ARC signing for case when DKIM signing failed. Previously this would
1088 JH/11 Bug 2264: Exim now only follows CNAME chains one step by default. We'd
1089 like zero, since the resolver should be doing this for us, But we need one
1090 as a CNAME but no MX presence gets the CNAME returned; we need to check
1091 that doesn't point to an MX to declare it "no MX returned" rather than
1092 "error, loop". A new main option is added so the older capability of
1093 following some limited number of chain links is maintained.
1095 JH/12 Add client-ip info to non-pass iprev ${authres } lines.
1097 JH/13 For receent Openssl versions (1.1 onward) use modern generic protocol
1098 methods. These should support TLS 1.3; they arrived with TLS 1.3 and the
1099 now-deprecated earlier definitions used only specified the range up to TLS
1100 1.2 (in the older-version library docs).
1102 JH/14 Bug 2284: Fix DKIM signing for body lines starting with a pair of dots.
1104 JH/15 Rework TLS client-side context management. Stop using a global, and
1105 explicitly pass a context around. This enables future use of TLS for
1106 connections to service-daemons (eg. malware scanning) while a client smtp
1107 connection is using TLS; with cutthrough connections this is quite likely.
1109 JH/16 Fix ARC verification to do AS checks in reverse order.
1111 JH/17 Support a "tls" option on the ${readsocket } expansion item.
1113 JH/18 Bug 2287: Fix the protocol name (eg utf8esmtp) for multiple messages
1114 using the SMTPUTF8 option on their MAIL FROM commands, in one connection.
1115 Previously the "utf8" would be re-prepended for every additional message.
1117 JH/19 Reject MAIL FROM commands with SMTPUTF8 when the facility was not advertised.
1118 Previously thery were accepted, resulting in issues when attempting to
1119 forward messages to a non-supporting MTA.
1121 PP/02 Let -n work with printing macros too, not just options.
1123 JH/20 Bug 2296: Fix cutthrough for >1 address redirection. Previously only
1124 one parent address was copied, and bogus data was used at delivery-logging
1125 time. Either a crash (after delivery) or bogus log data could result.
1126 Discovery and analysis by Tim Stewart.
1128 PP/03 Make ${utf8clean:} expansion operator detect incomplete final character.
1129 Previously if the string ended mid-character, we did not insert the
1130 promised '?' replacement.
1132 PP/04 Documentation: current string operators work on bytes, not codepoints.
1134 JH/21 Change as many as possible of the global flags into one-bit bitfields; these
1135 should pack well giving a smaller memory footprint so better caching and
1136 therefore performance. Group the declarations where this can't be done so
1137 that the byte-sized flag variables are not interspersed among pointer
1138 variables, giving a better chance of good packing by the compiler.
1140 JH/22 Bug 1896: Fix the envelope from for DMARC forensic reports to be possibly
1141 non-null, to avoid issues with sites running BATV. Previously reports were
1142 sent with an empty envelope sender so looked like bounces.
1144 JH/23 Bug 2318: Fix the noerror command within filters. It wasn't working.
1145 The ignore_error flag wasn't being returned from the filter subprocess so
1146 was not set for later routers. Investigation and fix by Matthias Kurz.
1148 JH/24 Bug 2310: Raise a msg:fail:internal event for each undelivered recipient,
1149 and a msg:complete for the whole, when a message is manually removed using
1150 -Mrm. Developement by Matthias Kurz, hacked on by JH.
1152 JH/25 Avoid fixed-size buffers for pathnames in DB access. This required using
1153 a "Gnu special" function, asprintf() in the DB utility binary builds; I
1154 hope that is portable enough.
1156 JH/26 Bug 2311: Fix DANE-TA verification under GnuTLS. Previously it was also
1157 requiring a known-CA anchor certificate; make it now rely entirely on the
1158 TLSA as an anchor. Checking the name on the leaf cert against the name
1159 on the A-record for the host is still done for TA (but not for EE mode).
1161 JH/27 Fix logging of proxy address. Previously, a pointless "PRX=[]:0" would be
1162 included in delivery lines for non-proxied connections, when compiled with
1163 SUPPORT_SOCKS and running with proxy logging enabled.
1165 JH/28 Bug 2314: Fire msg:fail:delivery event even when error is being ignored.
1166 Developement by Matthias Kurz, tweaked by JH. While in that bit of code,
1167 move the existing event to fire before the normal logging of message
1168 failure so that custom logging is bracketed by normal logging.
1170 JH/29 Bug 2322: A "fail" command in a non-system filter (file) now fires the
1171 msg:fail:internal event. Developement by Matthias Kurz.
1173 JH/30 Bug 2329: Increase buffer size used for dns lookup from 2k, which was
1174 far too small for todays use of crypto signatures stored there. Go all
1175 the way to the max DNS message size of 64kB, even though this might be
1176 overmuch for IOT constrained device use.
1178 JH/31 Fix a bad use of a copy function, which could be used to pointlessly
1179 copy a string over itself. The library routine is documented as not
1180 supporting overlapping copies, and on MacOS it actually raised a SIGABRT.
1182 JH/32 For main options check_spool_space and check_inode_space, where the
1183 platform supports 64b integers, support more than the previous 2^31 kB
1184 (i.e. more than 2 TB). Accept E, P and T multipliers in addition to
1185 the previous G, M, k.
1187 JH/33 Bug 2338: Fix the cyrus-sasl authenticator to fill in the
1188 $authenticated_fail_id variable on authentication failure. Previously
1191 JH/34 Increase RSA keysize of autogen selfsign cert from 1024 to 2048. RHEL 8.0
1192 OpenSSL didn't want to use such a weak key. Do for GnuTLS also, and for
1193 more-modern GnuTLS move from GNUTLS_SEC_PARAM_LOW to
1194 GNUTLS_SEC_PARAM_MEDIUM.
1196 JH/35 OpenSSL: fail the handshake when SNI processing hits a problem, server
1197 side. Previously we would continue as if no SNI had been received.
1199 JH/36 Harden the handling of string-lists. When a list consisted of a sole
1200 "<" character, which should be a list-separator specification, we walked
1201 off past the nul-terimation.
1203 JH/37 Bug 2341: Send "message delayed" warning MDNs (restricted to external
1204 causes) even when the retry time is not yet met. Previously they were
1205 not, meaning that when (say) an account was over-quota and temp-rejecting,
1206 and multiple senders' messages were queued, only one sender would get
1207 notified on each configured delay_warning cycle.
1209 JH/38 Bug 2351: Log failures to extract envelope addresses from message headers.
1211 JH/39 OpenSSL: clear the error stack after an SSL_accept(). With anon-auth
1212 cipher-suites, an error can be left on the stack even for a succeeding
1213 accept; this results in impossible error messages when a later operation
1216 AM/01 Bug 2359: GnuTLS: repeat lowlevel read and write operations while they
1217 return error codes indicating retry. Under TLS1.3 this becomes required.
1219 JH/40 Fix the feature-cache refresh for EXPERIMENTAL_PIPE_CONNECT. Previously
1220 it only wrote the new authenticators, resulting in a lack of tracking of
1221 peer changes of ESMTP extensions until the next cache flush.
1223 JH/41 Fix the loop reading a message header line to check for integer overflow,
1224 and more-often against header_maxsize. Previously a crafted message could
1225 induce a crash of the recive process; now the message is cleanly rejected.
1227 JH/42 Bug 2366: Fix the behaviour of the dkim_verify_signers option. It had
1228 been totally disabled for all of 4.91. Discovery and fix by "Mad Alex".
1234 GF/01 DEFER rather than ERROR on redis cluster MOVED response.
1235 When redis_servers is set to a list of > 1 element, and the Redis servers
1236 in that list are in cluster configuration, convert the REDIS_REPLY_ERROR
1237 case of MOVED into a DEFER case instead, thus moving the query onto the
1238 next server in the list. For a cluster of N elements, all N servers must
1239 be defined in redis_servers.
1241 GF/02 Catch and remove uninitialized value warning in exiqsumm
1242 Check for existence of @ARGV before looking at $ARGV[0]
1244 JH/01 Replace the store_release() internal interface with store_newblock(),
1245 which internalises the check required to safely use the old one, plus
1246 the allocate and data copy operations duplicated in both (!) of the
1247 extant use locations.
1249 JH/02 Disallow '/' characters in queue names specified for the "queue=" ACL
1250 modifier. This matches the restriction on the commandline.
1252 JH/03 Fix pgsql lookup for multiple result-tuples with a single column.
1253 Previously only the last row was returned.
1255 JH/04 Bug 2217: Tighten up the parsing of DKIM signature headers. Previously
1256 we assumed that tags in the header were well-formed, and parsed the
1257 element content after inspecting only the first char of the tag.
1258 Assumptions at that stage could crash the receive process on malformed
1261 JH/05 Bug 2215: Fix crash associated with dnsdb lookup done from DKIM ACL.
1262 While running the DKIM ACL we operate on the Permanent memory pool so that
1263 variables created with "set" persist to the DATA ACL. Also (at any time)
1264 DNS lookups that fail create cache records using the Permanent pool. But
1265 expansions release any allocations made on the current pool - so a dnsdb
1266 lookup expansion done in the DKIM ACL releases the memory used for the
1267 DNS negative-cache, and bad things result. Solution is to switch to the
1268 Main pool for expansions.
1269 While we're in that code, add checks on the DNS cache during store_reset,
1270 active in the testsuite.
1271 Problem spotted, and debugging aided, by Wolfgang Breyha.
1273 JH/06 Fix issue with continued-connections when the DNS shifts unreliably.
1274 When none of the hosts presented to a transport match an already-open
1275 connection, close it and proceed with the list. Previously we would
1276 queue the message. Spotted by Lena with Yahoo, probably involving
1279 JH/07 Bug 2214: Fix SMTP responses resulting from non-accept result of MIME ACL.
1280 Previously a spurious "250 OK id=" response was appended to the proper
1283 JH/08 The "support for" informational output now, which built with Content
1284 Scanning support, has a line for the malware scanner interfaces compiled
1285 in. Interface can be individually included or not at build time.
1287 JH/09 The "aveserver", "kavdaemon" and "mksd" interfaces are now not included
1288 by the template makefile "src/EDITME". The "STREAM" support for an older
1289 ClamAV interface method is removed.
1291 JH/10 Bug 2223: Fix mysql lookup returns for the no-data case (when the number of
1292 rows affected is given instead).
1294 JH/11 The runtime Berkeley DB library version is now additionally output by
1295 "exim -d -bV". Previously only the compile-time version was shown.
1297 JH/12 Bug 2230: Fix cutthrough routing for nonfirst messages in an initiating
1298 SMTP connection. Previously, when one had more recipients than the
1299 first, an abortive onward connection was made. Move to full support for
1300 multiple onward connections in sequence, handling cutthrough connection
1301 for all multi-message initiating connections.
1303 JH/13 Bug 2229: Fix cutthrough routing for nonstandard port numbers defined by
1304 routers. Previously, a multi-recipient message would fail to match the
1305 onward-connection opened for the first recipient, and cause its closure.
1307 JH/14 Bug 2174: A timeout on connect for a callout was also erroneously seen as
1308 a timeout on read on a GnuTLS initiating connection, resulting in the
1309 initiating connection being dropped. This mattered most when the callout
1310 was marked defer_ok. Fix to keep the two timeout-detection methods
1313 JH/15 Relax results from ACL control request to enable cutthrough, in
1314 unsupported situations, from error to silently (except under debug)
1315 ignoring. This covers use with PRDR, frozen messages, queue-only and
1318 HS/01 Fix Buffer overflow in base64d() (CVE-2018-6789)
1320 JH/16 Fix bug in DKIM verify: a buffer overflow could corrupt the malloc
1321 metadata, resulting in a crash in free().
1323 PP/01 Fix broken Heimdal GSSAPI authenticator integration.
1324 Broken in f2ed27cf5, missing an equals sign for specified-initialisers.
1325 Broken also in d185889f4, with init system revamp.
1327 JH/17 Bug 2113: Fix conversation closedown with the Avast malware scanner.
1328 Previously we abruptly closed the connection after reading a malware-
1329 found indication; now we go on to read the "scan ok" response line,
1332 JH/18 Bug 2239: Enforce non-usability of control=utf8_downconvert in the mail
1333 ACL. Previously, a crash would result.
1335 JH/19 Speed up macro lookups during configuration file read, by skipping non-
1336 macro text after a replacement (previously it was only once per line) and
1337 by skipping builtin macros when searching for an uppercase lead character.
1339 JH/20 DANE support moved from Experimental to mainline. The Makefile control
1340 for the build is renamed.
1342 JH/21 Fix memory leak during multi-message connections using STARTTLS. A buffer
1343 was allocated for every new TLS startup, meaning one per message. Fix
1344 by only allocating once (OpenSSL) or freeing on TLS-close (GnuTLS).
1346 JH/22 Bug 2236: When a DKIM verification result is overridden by ACL, DMARC
1347 reported the original. Fix to report (as far as possible) the ACL
1348 result replacing the original.
1350 JH/23 Fix memory leak during multi-message connections using STARTTLS under
1351 OpenSSL. Certificate information is loaded for every new TLS startup,
1352 and the resources needed to be freed.
1354 JH/24 Bug 2242: Fix exim_dbmbuild to permit directoryless filenames.
1356 JH/25 Fix utf8_downconvert propagation through a redirect router. Previously it
1359 JH/26 Bug 2253: For logging delivery lines under PRDR, append the overall
1360 DATA response info to the (existing) per-recipient response info for
1361 the "C=" log element. It can have useful tracking info from the
1362 destination system. Patch from Simon Arlott.
1364 JH/27 Bug 2251: Fix ldap lookups that return a single attribute having zero-
1365 length value. Previously this would segfault.
1367 HS/02 Support Avast multiline protoocol, this allows passing flags to
1368 newer versions of the scanner.
1370 JH/28 Ensure that variables possibly set during message acceptance are marked
1371 dead before release of memory in the daemon loop. This stops complaints
1372 about them when the debug_store option is enabled. Discovered specifically
1373 for sender_rate_period, but applies to a whole set of variables.
1374 Do the same for the queue-runner and queue-list loops, for variables set
1375 from spool message files. Do the same for the SMTP per-message loop, for
1376 certain variables indirectly set in ACL operations.
1378 JH/29 Bug 2250: Fix a longstanding bug in heavily-pipelined SMTP input (such
1379 as a multi-recipient message from a mailinglist manager). The coding had
1380 an arbitrary cutoff number of characters while checking for more input;
1381 enforced by writing a NUL into the buffer. This corrupted long / fast
1382 input. The problem was exposed more widely when more pipelineing of SMTP
1383 responses was introduced, and one Exim system was feeding another.
1384 The symptom is log complaints of SMTP syntax error (NUL chars) on the
1385 receiving system, and refused recipients seen by the sending system
1386 (propating to people being dropped from mailing lists).
1387 Discovered and pinpointed by David Carter.
1389 JH/30 The (EXPERIMENTAL_DMARC) variable $dmarc_ar_header is withdrawn, being
1390 replaced by the ${authresults } expansion.
1392 JH/31 Bug 2257: Fix pipe transport to not use a socket-only syscall.
1394 HS/03 Set a handler for SIGTERM and call exit(3) if running as PID 1. This
1395 allows proper process termination in container environments.
1397 JH/32 Bug 2258: Fix spool_wireformat in combination with LMTP transport.
1398 Previously the "final dot" had a newline after it; ensure it is CR,LF.
1400 JH/33 SPF: remove support for the "spf" ACL condition outcome values "err_temp"
1401 and "err_perm", deprecated since 4.83 when the RFC-defined words
1402 "temperror" and "permerror" were introduced.
1404 JH/34 Re-introduce enforcement of no cutthrough delivery on transports having
1405 transport-filters or DKIM-signing. The restriction was lost in the
1406 consolidation of verify-callout and delivery SMTP handling.
1407 Extend the restriction to also cover ARC-signing.
1409 JH/35 Cutthrough: for a final-dot response timeout (and nonunderstood responses)
1410 in defer=pass mode supply a 450 to the initiator. Previously the message
1413 PP/02 DANE: add dane_require_tls_ciphers SMTP Transport option; if unset,
1414 tls_require_ciphers is used as before.
1416 HS/03 Malware Avast: Better match the Avast multiline protocol. Add
1417 "pass_unscanned". Only tmpfails from the scanner are written to
1418 the paniclog, as they may require admin intervention (permission
1419 denied, license issues). Other scanner errors (like decompression
1420 bombs) do not cause a paniclog entry.
1422 JH/36 Fix reinitialisation of DKIM logging variable between messages.
1423 Previously it was possible to log spurious information in receive log
1426 JH/37 Bug 2255: Revert the disable of the OpenSSL session caching. This
1427 triggered odd behaviour from Outlook Express clients.
1429 PP/03 Add util/renew-opendmarc-tlds.sh script for safe renewal of public
1432 JH/38 DKIM: accept Ed25519 pubkeys in SubjectPublicKeyInfo-wrapped form,
1433 since the IETF WG has not yet settled on that versus the original
1434 "bare" representation.
1436 JH/39 Fix syslog logging for syslog_timestamp=no and log_selector +millisec.
1437 Previously the millisecond value corrupted the output.
1438 Fix also for syslog_pid=no and log_selector +pid, for which the pid
1439 corrupted the output.
1445 JH/01 Rework error string handling in TLS interface so that the caller in
1446 more cases is responsible for logging. This permits library-sourced
1447 string to be attached to addresses during delivery, and collapses
1448 pairs of long lines into single ones.
1450 PP/01 Allow PKG_CONFIG_PATH to be set in Local/Makefile and use it correctly
1451 during configuration. Wildcards are allowed and expanded.
1453 JH/02 Rework error string handling in DKIM to pass more info back to callers.
1454 This permits better logging.
1456 JH/03 Rework the transport continued-connection mechanism: when TLS is active,
1457 do not close it down and have the child transport start it up again on
1458 the passed-on TCP connection. Instead, proxy the child (and any
1459 subsequent ones) for TLS via a unix-domain socket channel. Logging is
1460 affected: the continued delivery log lines do not have any DNSSEC, TLS
1461 Certificate or OCSP information. TLS cipher information is still logged.
1463 JH/04 Shorten the log line for daemon startup by collapsing adjacent sets of
1464 identical IP addresses on different listening ports. Will also affect
1467 PP/02 Bug 2070: uClibc defines __GLIBC__ without providing glibc headers;
1468 add noisy ifdef guards to special-case this sillyness.
1469 Patch from Bernd Kuhls.
1471 JH/05 Tighten up the checking in isip4 (et al): dotted-quad components larger
1472 than 255 are no longer allowed.
1474 JH/06 Default openssl_options to include +no_ticket, to reduce load on peers.
1475 Disable the session-cache too, which might reduce our load. Since we
1476 currrectly use a new context for every connection, both as server and
1477 client, there is no benefit for these.
1478 GnuTLS appears to not support tickets server-side by default (we don't
1479 call gnutls_session_ticket_enable_server()) but client side is enabled
1480 by default on recent versions (3.1.3 +) unless the PFS priority string
1483 PP/03 Add $SOURCE_DATE_EPOCH support for reproducible builds, per spec at
1484 <https://reproducible-builds.org/specs/source-date-epoch/>.
1486 JH/07 Fix smtp transport use of limited max_rcpt under mua_wrapper. Previously
1487 the check for any unsuccessful recipients did not notice the limit, and
1488 erroneously found still-pending ones.
1490 JH/08 Pipeline CHUNKING command and data together, on kernels that support
1491 MSG_MORE. Only in-clear (not on TLS connections).
1493 JH/09 Avoid using a temporary file during transport using dkim. Unless a
1494 transport-filter is involved we can buffer the headers in memory for
1495 creating the signature, and read the spool data file once for the
1496 signature and again for transmission.
1498 JH/10 Enable use of sendfile in Linux builds as default. It was disabled in
1499 4.77 as the kernel support then wasn't solid, having issues in 64bit
1500 mode. Now, it's been long enough. Add support for FreeBSD also.
1502 JH/11 Bug 2104: Fix continued use of a transport connection with TLS. In the
1503 case where the routing stage had gathered several addresses to send to
1504 a host before calling the transport for the first, we previously failed
1505 to close down TLS in the old transport process before passing the TCP
1506 connection to the new process. The new one sent a STARTTLS command
1507 which naturally failed, giving a failed delivery and bloating the retry
1508 database. Investigation and fix prototype from Wolfgang Breyha.
1510 JH/12 Fix check on SMTP command input synchronisation. Previously there were
1511 false-negatives in the check that the sender had not preempted a response
1512 or prompt from Exim (running as a server), due to that code's lack of
1513 awareness of the SMTP input buffering.
1515 PP/04 Add commandline_checks_require_admin option.
1516 Exim drops privileges sanely, various checks such as -be aren't a
1517 security problem, as long as you trust local users with access to their
1518 own account. When invoked by services which pass untrusted data to
1519 Exim, this might be an issue. Set this option in main configuration
1520 AND make fixes to the calling application, such as using `--` to stop
1523 JH/13 Do pipelining under TLS. Previously, although safe, no advantage was
1524 taken. Now take care to pack both (client) MAIL,RCPT,DATA, and (server)
1525 responses to those, into a single TLS record each way (this usually means
1526 a single packet). As a side issue, smtp_enforce_sync now works on TLS
1529 PP/05 OpenSSL/1.1: use DH_bits() for more accurate DH param sizes. This
1530 affects you only if you're dancing at the edge of the param size limits.
1531 If you are, and this message makes sense to you, then: raise the
1532 configured limit or use OpenSSL 1.1. Nothing we can do for older
1535 JH/14 For the "sock" variant of the malware scanner interface, accept an empty
1536 cmdline element to get the documented default one. Previously it was
1539 JH/15 Fix a crash in the smtp transport caused when two hosts in succession
1540 are unsuable for non-message-specific reasons - eg. connection timeout,
1541 banner-time rejection.
1543 JH/16 Fix logging of delivery remote port, when specified by router, under
1546 PP/06 Repair manualroute's ability to take options in any order, even if one
1547 is the name of a transport.
1550 HS/01 Cleanup, prevent repeated use of -p/-oMr (CVE-2017-1000369)
1552 JH/17 Change the list-building routines interface to use the expanding-string
1553 triplet model, for better allocation and copying behaviour.
1555 JH/18 Prebuild the data-structure for "builtin" macros, for faster startup.
1556 Previously it was constructed the first time a possibly-matching string
1557 was met in the configuration file input during startup; now it is done
1560 JH/19 Bug 2141: Use the full-complex API for Berkeley DB rather than the legacy-
1561 compatible one, to avoid the (poorly documented) possibility of a config
1562 file in the working directory redirecting the DB files, possibly correpting
1563 some existing file. CVE-2017-10140 assigned for BDB.
1565 JH/20 Bug 2147: Do not defer for a verify-with-callout-and-random which is not
1566 cache-hot. Previously, although the result was properly cached, the
1567 initial verify call returned a defer.
1569 JH/21 Bug 2151: Avoid using SIZE on the MAIL for a callout verify, on any but
1570 the main verify for receipient in uncached-mode.
1572 JH/22 Retire historical build files to an "unsupported" subdir. These are
1573 defined as "ones for which we have no current evidence of testing".
1575 JH/23 DKIM: enforce the DNS pubkey record "h" permitted-hashes optional field,
1576 if present. Previously it was ignored.
1578 JH/24 Start using specified-initialisers in C structure init coding. This is
1579 a C99 feature (it's 2017, so now considered safe).
1581 JH/25 Use one-bit bitfields for flags in the "addr" data structure. Previously
1582 if was a fixed-sized field and bitmask ops via macros; it is now more
1585 PP/07 GitHub PR 56: Apply MariaDB build fix.
1586 Patch provided by Jaroslav Škarvada.
1588 PP/08 Bug 2161: Fix regression in sieve quoted-printable handling introduced
1589 during Coverity cleanups [4.87 JH/47]
1590 Diagnosis and fix provided by Michael Fischer v. Mollard.
1592 JH/26 Fix DKIM bug: when the pseudoheader generated for signing was exactly
1593 the right size to place the terminating semicolon on its own folded
1594 line, the header hash was calculated to an incorrect value thanks to
1595 the (relaxed) space the fold became.
1597 HS/02 Fix Bug 2130: large writes from the transport subprocess were chunked
1598 and confused the parent.
1600 JH/27 Fix SOCKS bug: an unitialized pointer was deref'd by the transport process
1601 which could crash as a result. This could lead to undeliverable messages.
1603 JH/28 Logging: "next input sent too soon" now shows where input was truncated
1606 JH/29 Fix queue_run_in_order to ignore the PID portion of the message ID. This
1607 matters on fast-turnover and PID-randomising systems, which were getting
1608 out-of-order delivery.
1610 JH/30 Fix a logging bug on aarch64: an unsafe routine was previously used for
1611 a possibly-overlapping copy. The symptom was that "Remote host closed
1612 connection in response to HELO" was logged instead of the actual 4xx
1615 JH/31 Fix CHUNKING code to properly flush the unwanted chunk after an error.
1616 Previously only that bufferd was discarded, resulting in SYMTP command
1619 JH/32 DKIM: when a message has multiple signatures matching an identity given
1620 in dkim_verify_signers, run the dkim acl once for each. Previously only
1621 one run was done. Bug 2189.
1623 JH/33 Downgrade an unfound-list name (usually a typo in the config file) from
1624 "panic the current process" to "deliberately defer". The panic log is
1625 still written with the problem list name; the mail and reject logs now
1626 get a temp-reject line for the message that was being handled, saying
1627 something like "domains check lookup or other defer". The SMTP 451
1628 message is still "Temporary local problem".
1630 JH/34 Bug 2199: Fix a use-after-free while reading smtp input for header lines.
1631 A crafted sequence of BDAT commands could result in in-use memory beeing
1632 freed. CVE-2017-16943.
1634 HS/03 Bug 2201: Fix checking for leading-dot on a line during headers reading
1635 from SMTP input. Previously it was always done; now only done for DATA
1636 and not BDAT commands. CVE-2017-16944.
1638 JH/35 Bug 2201: Flush received data in BDAT mode after detecting an error fatal
1639 to the message (such as an overlong header line). Previously this was
1640 not done and we did not exit BDAT mode. Followon from the previous item
1641 though a different problem.
1647 JH/01 Bug 1922: Support IDNA2008. This has slightly different conversion rules
1648 than -2003 did; needs libidn2 in addition to libidn.
1650 JH/02 The path option on a pipe transport is now expanded before use.
1652 PP/01 GitHub PR 50: Do not call ldap_start_tls_s on ldapi:// connections.
1653 Patch provided by "Björn", documentation fix added too.
1655 JH/03 Bug 2003: fix Proxy Protocol v2 handling: the address size field was
1656 missing a wire-to-host endian conversion.
1658 JH/04 Bug 2004: fix CHUNKING in non-PIPELINEING mode. Chunk data following
1659 close after a BDAT command line could be taken as a following command,
1660 giving a synch failure. Fix by only checking for synch immediately
1661 before acknowledging the chunk.
1663 PP/02 GitHub PR 52: many spelling fixes, which include fixing parsing of
1664 no_require_dnssec option and creation of _HAVE_TRANSPORT_APPEND_MAILDIR
1665 macro. Patches provided by Josh Soref.
1667 JH/05 Have the EHLO response advertise VRFY, if there is a vrfy ACL defined.
1668 Previously we did not; the RFC seems ambiguous and VRFY is not listed
1669 by IANA as a service extension. However, John Klensin suggests that we
1672 JH/06 Bug 2017: Fix DKIM verification in -bh test mode. The data feed into
1673 the dkim code may be unix-mode line endings rather than smtp wire-format
1674 CRLF, so prepend a CR to any bare LF.
1676 JH/07 Rationalise the coding for callout smtp conversations and transport ones.
1677 As a side-benfit, callouts can now use PIPELINING hence fewer round-trips.
1679 JH/08 Bug 2016: Fix DKIM verification vs. CHUNKING. Any BDAT commands after
1680 the first were themselves being wrongly included in the feed into dkim
1681 processing; with most chunk sizes in use this resulted in an incorrect
1682 body hash calculated value.
1684 JH/09 Bug 2014: permit inclusion of a DKIM-Signature header in a received
1685 DKIM signature block, for verification. Although advised against by
1686 standards it is specifically not ruled illegal.
1688 JH/10 Bug 2025: Fix reception of (quoted) local-parts with embedded spaces.
1690 JH/11 Bug 2029: Fix crash in DKIM verification when a message signature block is
1691 missing a body hash (the bh= tag).
1693 JH/12 Bug 2018: Re-order Proxy Protocol startup versus TLS-on-connect startup.
1694 It seems that HAProxy sends the Proxy Protocol information in clear and
1695 only then does a TLS startup, so do the same.
1697 JH/13 Bug 2027: Avoid attempting to use TCP Fast Open for non-transport client
1698 TCP connections (such as for Spamd) unless the daemon successfully set
1699 Fast Open mode on its listening sockets. This fixes breakage seen on
1700 too-old kernels or those not configured for Fast Open, at the cost of
1701 requiring both directions being enabled for TFO, and TFO never being used
1702 by non-daemon-related Exim processes.
1704 JH/14 Bug 2000: Reject messages recieved with CHUNKING but with malformed line
1705 endings, at least on the first header line. Try to canonify any that get
1706 past that check, despite the cost.
1708 JH/15 Angle-bracket nesting (an error inserted by broken sendmails) levels are
1709 now limited to an arbitrary five deep, while parsing addresses with the
1710 strip_excess_angle_brackets option enabled.
1712 PP/03 Bug 2018: For Proxy Protocol and TLS-on-connect, do not over-read and
1713 instead leave the unprompted TLS handshake in socket buffer for the
1714 TLS library to consume.
1716 PP/04 Bug 2018: Also handle Proxy Protocol v2 safely.
1718 PP/05 FreeBSD compat: handle that Ports no longer create /usr/bin/perl
1720 JH/16 Drop variables when they go out of scope. Memory management drops a whole
1721 region in one operation, for speed, and this leaves assigned pointers
1722 dangling. Add checks run only under the testsuite which checks all
1723 variables at a store-reset and panics on a dangling pointer; add code
1724 explicitly nulling out all the variables discovered. Fixes one known
1725 bug: a transport crash, where a dangling pointer for $sending_ip_address
1726 originally assigned in a verify callout, is re-used.
1728 PP/06 Drop '.' from @INC in various Perl scripts.
1730 PP/07 Switch FreeBSD iconv to always use the base-system libc functions.
1732 PP/08 Reduce a number of compilation warnings under clang; building with
1733 CC=clang CFLAGS+=-Wno-dangling-else -Wno-logical-op-parentheses
1734 should be warning-free.
1736 JH/17 Fix inbound CHUNKING when DKIM disabled at runtime.
1738 HS/01 Fix portability problems introduced by PP/08 for platforms where
1739 realloc(NULL) is not equivalent to malloc() [SunOS et al].
1741 HS/02 Bug 1974: Fix missing line terminator on the last received BDAT
1742 chunk. This allows us to accept broken chunked messages. We need a more
1743 general solution here.
1745 PP/09 Wrote util/chunking_fixqueue_finalnewlines.pl to help recover
1746 already-broken messages in the queue.
1748 JH/18 Bug 2061: Fix ${extract } corrupting an enclosing ${reduce } $value.
1750 JH/19 Fix reference counting bug in routing-generated-address tracking.
1756 JH/01 Use SIZE on MAIL FROM in a cutthrough connection, if the destination
1757 supports it and a size is available (ie. the sending peer gave us one).
1759 JH/02 The obsolete acl condition "demime" is removed (finally, after ten
1760 years of being deprecated). The replacements are the ACLs
1761 acl_smtp_mime and acl_not_smtp_mime.
1763 JH/03 Upgrade security requirements imposed for hosts_try_dane: previously
1764 a downgraded non-dane trust-anchor for the TLS connection (CA-style)
1765 or even an in-clear connection were permitted. Now, if the host lookup
1766 was dnssec and dane was requested then the host is only used if the
1767 TLSA lookup succeeds and is dnssec. Further hosts (eg. lower priority
1768 MXs) will be tried (for hosts_try_dane though not for hosts_require_dane)
1769 if one fails this test.
1770 This means that a poorly-configured remote DNS will make it incommunicado;
1771 but it protects against a DNS-interception attack on it.
1773 JH/04 Bug 1810: make continued-use of an open smtp transport connection
1774 non-noisy when a race steals the message being considered.
1776 JH/05 If main configuration option tls_certificate is unset, generate a
1777 self-signed certificate for inbound TLS connections.
1779 JH/06 Bug 165: hide more cases of password exposure - this time in expansions
1780 in rewrites and routers.
1782 JH/07 Retire gnutls_require_mac et.al. These were nonfunctional since 4.80
1783 and logged a warning sing 4.83; now they are a configuration file error.
1785 JH/08 Bug 1836: Fix crash in VRFY handling when handed an unqualified name
1786 (lacking @domain). Apply the same qualification processing as RCPT.
1788 JH/09 Bug 1804: Avoid writing msglog files when in -bh or -bhc mode.
1790 JH/10 Support ${sha256:} applied to a string (as well as the previous
1793 JH/11 Cutthrough: avoid using the callout hints db on a verify callout when
1794 a cutthrough deliver is pending, as we always want to make a connection.
1795 This also avoids re-routing the message when later placing the cutthrough
1796 connection after a verify cache hit.
1797 Do not update it with the verify result either.
1799 JH/12 Cutthrough: disable when verify option success_on_redirect is used, and
1800 when routing results in more than one destination address.
1802 JH/13 Cutthrough: expand transport dkim_domain option when testing for dkim
1803 signing (which inhibits the cutthrough capability). Previously only
1804 the presence of an option was tested; now an expansion evaluating as
1805 empty is permissible (obviously it should depend only on data available
1806 when the cutthrough connection is made).
1808 JH/14 Fix logging of errors under PIPELINING. Previously the log line giving
1809 the relevant preceding SMTP command did not note the pipelining mode.
1811 JH/15 Fix counting of empty lines in $body_linecount and $message_linecount.
1812 Previously they were not counted.
1814 JH/16 DANE: treat a TLSA lookup response having all non-TLSA RRs, the same
1815 as one having no matching records. Previously we deferred the message
1816 that needed the lookup.
1818 JH/17 Fakereject: previously logged as a normal message arrival "<="; now
1819 distinguished as "(=".
1821 JH/18 Bug 1867: make the fail_defer_domains option on a dnslookup router work
1822 for missing MX records. Previously it only worked for missing A records.
1824 JH/19 Bug 1850: support Radius libraries that return REJECT_RC.
1826 JH/20 Bug 1872: Ensure that acl_smtp_notquit is run when the connection drops
1827 after the data-go-ahead and data-ack. Patch from Jason Betts.
1829 JH/21 Bug 1846: Send DMARC forensic reports for reject and quarantine results,
1830 even for a "none" policy. Patch from Tony Meyer.
1832 JH/22 Fix continued use of a connection for further deliveries. If a port was
1833 specified by a router, it must also match for the delivery to be
1836 JH/23 Bug 1874: fix continued use of a connection for further deliveries.
1837 When one of the recipients of a message was unsuitable for the connection
1838 (has no matching addresses), we lost track of needing to mark it
1839 deferred. As a result mail would be lost.
1841 JH/24 Bug 1832: Log EHLO response on getting conn-close response for HELO.
1843 JH/25 Decoding ACL controls is now done using a binary search; the source code
1844 takes up less space and should be simpler to maintain. Merge the ACL
1845 condition decode tables also, with similar effect.
1847 JH/26 Fix problem with one_time used on a redirect router which returned the
1848 parent address unchanged. A retry would see the parent address marked as
1849 delivered, so not attempt the (identical) child. As a result mail would
1852 JH/27 Fix a possible security hole, wherein a process operating with the Exim
1853 UID can gain a root shell. Credit to http://www.halfdog.net/ for
1854 discovery and writeup. Ubuntu bug 1580454; no bug raised against Exim
1857 JH/28 Enable {spool,log} filesystem space and inode checks as default.
1858 Main config options check_{log,spool}_{inodes,space} are now
1859 100 inodes, 10MB unless set otherwise in the configuration.
1861 JH/29 Fix the connection_reject log selector to apply to the connect ACL.
1862 Previously it only applied to the main-section connection policy
1865 JH/30 Bug 1897: fix callouts connection fallback from TLS to cleartext.
1867 PP/01 Changed default Diffie-Hellman parameters to be Exim-specific, created
1868 by me. Added RFC7919 DH primes as an alternative.
1870 PP/02 Unbreak build via pkg-config with new hash support when crypto headers
1871 are not in the system include path.
1873 JH/31 Fix longstanding bug with aborted TLS server connection handling. Under
1874 GnuTLS, when a session startup failed (eg because the client disconnected)
1875 Exim did stdio operations after fclose. This was exposed by a recent
1876 change which nulled out the file handle after the fclose.
1878 JH/32 Bug 1909: Fix OCSP proof verification for cases where the proof is
1879 signed directly by the cert-signing cert, rather than an intermediate
1880 OCSP-signing cert. This is the model used by LetsEncrypt.
1882 JH/33 Bug 1914: Ensure socket is nonblocking before draining after SMTP QUIT.
1884 HS/01 Fix leak in verify callout under GnuTLS, about 3MB per recipient on
1885 an incoming connection.
1887 HS/02 Bug 1802: Do not half-close the connection after sending a request
1890 HS/03 Use "auto" as the default EC curve parameter. For OpenSSL < 1.0.2
1891 fallback to "prime256v1".
1893 JH/34 SECURITY: Use proper copy of DATA command in error message.
1894 Could leak key material. Remotely exploitable. CVE-2016-9963.
1900 JH/01 Bug 1664: Disable OCSP for GnuTLS library versions at/before 3.3.16
1901 and 3.4.4 - once the server is enabled to respond to an OCSP request
1902 it does even when not requested, resulting in a stapling non-aware
1903 client dropping the TLS connection.
1905 TF/01 Code cleanup: Overhaul the debug_selector and log_selector machinery to
1906 support variable-length bit vectors. No functional change.
1908 TF/02 Improve the consistency of logging incoming and outgoing interfaces.
1909 The I= interface field on outgoing lines is now after the H= remote
1910 host field, same as incoming lines. There is a separate
1911 outgoing_interface log selector which allows you to disable the
1914 JH/02 Bug 728: Close logfiles after a daemon-process "exceptional" log write.
1915 If not running log_selector +smtp_connection the mainlog would be held
1916 open indefinitely after a "too many connections" event, including to a
1917 deleted file after a log rotate. Leave the per net connection logging
1918 leaving it open for efficiency as that will be quickly detected by the
1919 check on the next write.
1921 HS/01 Bug 1671: Fix post transport crash.
1922 Processing the wait-<transport> messages could crash the delivery
1923 process if the message IDs didn't exist for some reason. When
1924 using 'split_spool_directory=yes' the construction of the spool
1925 file name failed already, exposing the same netto behaviour.
1927 JH/03 Bug 425: Capture substrings in $regex1, $regex2 etc from regex &
1928 mime_regex ACL conditions.
1930 JH/04 Bug 1686: When compiled with EXPERIMENTAL_DSN_INFO: Add extra information
1931 to DSN fail messages (bounces): remote IP, remote greeting, remote response
1932 to HELO, local diagnostic string.
1934 JH/05 Downgrade message for a TLS-certificate-based authentication fail from
1935 log line to debug. Even when configured with a tls authenticator many
1936 client connections are expected to not authenticate in this way, so
1937 an authenticate fail is not an error.
1939 HS/02 Add the Exim version string to the process info. This way exiwhat
1940 gives some more detail about the running daemon.
1942 JH/06 Bug 1395: time-limit caching of DNS lookups, to the TTL value. This may
1943 matter for fast-change records such as DNSBLs.
1945 JH/07 Bug 1678: Always record an interface option value, if set, as part of a
1946 retry record, even if constant. There may be multiple transports with
1947 different interface settings and the retry behaviour needs to be kept
1950 JH/08 Bug 1586: exiqgrep now refuses to run if there are unexpected arguments.
1952 JH/09 Bug 1700: ignore space & tab embedded in base64 during decode.
1954 JH/10 Bug 840: fix log_defer_output option of pipe transport
1956 JH/11 Bug 830: use same host for all RCPTS of a message, even under
1957 hosts_randomize. This matters a lot when combined with mua_wrapper.
1959 JH/12 Bug 1706: percent and underbar characters are no longer escaped by the
1960 ${quote_pgsql:<string>} operator.
1962 JH/13 Bug 1708: avoid misaligned access in cached lookup.
1964 JH/14 Change header file name for freeradius-client. Relevant if compiling
1965 with Radius support; from the Gentoo tree and checked under Fedora.
1967 JH/15 Bug 1712: Introduce $prdr_requested flag variable
1969 JH/16 Bug 1714: Permit an empty string as expansion result for transport
1970 option transport_filter, meaning no filtering.
1972 JH/17 Bug 1713: Fix non-PDKIM_DEBUG build. Patch from Jasen Betts.
1974 JH/18 Bug 1709: When built with TLS support, the tls_advertise_hosts option now
1975 defaults to "*" (all hosts). The variable is now available when not built
1976 with TLS, default unset, mainly to enable keeping the testsuite sane.
1977 If a server certificate is not supplied (via tls_certificate) an error is
1978 logged, and clients will find TLS connections fail on startup. Presumably
1979 they will retry in-clear.
1980 Packagers of Exim are strongly encouraged to create a server certificate
1981 at installation time.
1983 HS/03 Add -bP config_file as a synonym for -bP configure_file, for consistency
1984 with the $config_file variable.
1986 JH/19 Two additional event types: msg:rcpt:defer and msg:rcpt:host:defer. Both
1987 in transport context, after the attempt, and per-recipient. The latter type
1988 is per host attempted. The event data is the error message, and the errno
1989 information encodes the lookup type (A vs. MX) used for the (first) host,
1990 and the trailing two digits of the smtp 4xx response.
1992 GF/01 Bug 1715: Fix for race condition in exicyclog, where exim could attempt
1993 to write to mainlog (or rejectlog, paniclog) in the window between file
1994 creation and permissions/ownership being changed. Particularly affects
1995 installations where exicyclog is run as root, rather than exim user;
1996 result is that the running daemon panics and dies.
1998 JH/20 Bug 1701: For MySQL lookups, support MySQL config file option group names.
2000 JH/21 Bug 1720: Add support for priority groups and weighted-random proxy
2001 selection for the EXPERIMENTAL_SOCKS feature, via new per-proxy options
2002 "pri" and "weight". Note that the previous implicit priority given by the
2003 list order is no longer honoured.
2005 JH/22 Bugs 963, 1721: Fix some corner cases in message body canonicalization
2006 for DKIM processing.
2008 JH/23 Move SOCKS5 support from Experimental to mainline, enabled for a build
2009 by defining SUPPORT_SOCKS.
2011 JH/26 Move PROXY support from Experimental to mainline, enabled for a build
2012 by defining SUPPORT_PROXY. Note that the proxy_required_hosts option
2013 is renamed to hosts_proxy, and the proxy_{host,target}_{address,port}.
2014 variables are renamed to proxy_{local,external}_{address,port}.
2016 JH/27 Move Internationalisation support from Experimental to mainline, enabled
2017 for a build by defining SUPPORT_I18N
2019 JH/28 Bug 1745: Fix redis lookups to handle (quoted) spaces embedded in parts
2020 of the query string, and make ${quote_redis:} do that quoting.
2022 JH/29 Move Events support from Experimental to mainline, enabled by default
2023 and removable for a build by defining DISABLE_EVENT.
2025 JH/30 Updated DANE implementation code to current from Viktor Dukhovni.
2027 JH/31 Fix bug with hosts_connection_nolog and named-lists which were wrongly
2028 cached by the daemon.
2030 JH/32 Move Redis support from Experimental to mainline, enabled for a build
2031 by defining LOOKUP_REDIS. The libhiredis library is required.
2033 JH/33 Bug 1748: Permit ACL dnslists= condition in non-smtp ACLs if explicit
2034 keys are given for lookup.
2036 JH/34 Bug 1192: replace the embedded copy of PolarSSL RSA routines in the DKIM
2037 support, by using OpenSSL or GnuTLS library ones. This means DKIM is
2038 only supported when built with TLS support. The PolarSSL SHA routines
2039 are still used when the TLS library is too old for convenient support.
2041 JH/35 Require SINGLE_DH_USE by default in OpenSSL (main config option
2042 openssl_options), for security. OpenSSL forces this from version 1.1.0
2043 server-side so match that on older versions.
2045 JH/36 Bug 1778: longstanding bug in memory use by the ${run } expansion: A fresh
2046 allocation for $value could be released as the expansion processing
2047 concluded, but leaving the global pointer active for it.
2049 JH/37 Bug 1769: Permit a VRFY ACL to override the default 252 response,
2050 and to use the domains and local_parts ACL conditions.
2052 JH/38 Fix cutthrough bug with body lines having a single dot. The dot was
2053 incorrectly not doubled on cutthrough transmission, hence seen as a
2054 body-termination at the receiving system - resulting in truncated mails.
2055 Commonly the sender saw a TCP-level error, and retransmitted the message
2056 via the normal store-and-forward channel. This could result in duplicates
2057 received - but deduplicating mailstores were liable to retain only the
2058 initial truncated version.
2060 JH/39 Bug 1781: Fix use of DKIM private-keys having trailing '=' in the base-64.
2062 JH/40 Fix crash in queryprogram router when compiled with EXPERIMENTAL_SRS.
2064 JH/41 Bug 1792: Fix selection of headers to sign for DKIM: bottom-up. While
2065 we're in there, support oversigning also; bug 1309.
2067 JH/42 Bug 1796: Fix error logged on a malware scanner connection failure.
2069 HS/04 Add support for keep_environment and add_environment options.
2071 JH/43 Tidy coding issues detected by gcc --fsanitize=undefined. Some remain;
2072 either intentional arithmetic overflow during PRNG, or testing config-
2075 JH/44 Bug 1800: The combination of a -bhc commandline option and cutthrough
2076 delivery resulted in actual delivery. Cancel cutthrough before DATA
2079 JH/45 Fix cutthrough, when connection not opened by verify and target hard-
2080 rejects a recipient: pass the reject to the originator.
2082 JH/46 Multiple issues raised by Coverity. Some were obvious or plausible bugs.
2083 Many were false-positives and ignorable, but it's worth fixing the
2086 JH/47 Fix build on HP-UX and older Solaris, which need (un)setenv now also
2087 for the new environment-manipulation done at startup. Move the routines
2088 from being local to tls.c to being global via the os.c file.
2090 JH/48 Bug 1807: Fix ${extract } for the numeric/3-string case. While preparsing
2091 an extract embedded as result-arg for a map, the first arg for extract
2092 is unavailable so we cannot tell if this is a numbered or keyed
2093 extraction. Accept either.
2099 JH/01 Bug 1545: The smtp transport option "retry_include_ip_address" is now
2102 JH/02 The smtp transport option "multi_domain" is now expanded.
2104 JH/03 The smtp transport now requests PRDR by default, if the server offers
2107 JH/04 Certificate name checking on server certificates, when exim is a client,
2108 is now done by default. The transport option tls_verify_cert_hostnames
2109 can be used to disable this per-host. The build option
2110 EXPERIMENTAL_CERTNAMES is withdrawn.
2112 JH/05 The value of the tls_verify_certificates smtp transport and main options
2113 default to the word "system" to access the system default CA bundle.
2114 For GnuTLS, only version 3.0.20 or later.
2116 JH/06 Verification of the server certificate for a TLS connection is now tried
2117 (but not required) by default. The verification status is now logged by
2118 default, for both outbound TLS and client-certificate supplying inbound
2121 JH/07 Changed the default rfc1413 lookup settings to disable calls. Few
2124 JH/08 The EXPERIMENTAL_DSN compile option is no longer needed; all Delivery
2125 Status Notification (bounce) messages are now MIME format per RFC 3464.
2126 Support for RFC 3461 DSN options NOTIFY,ENVID,RET,ORCPT can be advertised
2127 under the control of the dsn_advertise_hosts option, and routers may
2128 have a dsn_lasthop option.
2130 JH/09 A timeout of 2 minutes is now applied to all malware scanner types by
2131 default, modifiable by a malware= option. The list separator for
2132 the options can now be changed in the usual way. Bug 68.
2134 JH/10 The smtp_receive_timeout main option is now expanded before use.
2136 JH/11 The incoming_interface log option now also enables logging of the
2137 local interface on delivery outgoing connections.
2139 JH/12 The cutthrough-routing facility now supports multi-recipient mails,
2140 if the interface and destination host and port all match.
2142 JH/13 Bug 344: The verify = reverse_host_lookup ACL condition now accepts a
2145 JH/14 Bug 1573: The spam= ACL condition now additionally supports Rspamd.
2146 Patch from Andrew Lewis.
2148 JH/15 Bug 670: The spamd_address main option (for the spam= ACL condition)
2149 now supports optional time-restrictions, weighting, and priority
2150 modifiers per server. Patch originally by <rommer@active.by>.
2152 JH/16 The spamd_address main option now supports a mixed list of local
2153 and remote servers. Remote servers can be IPv6 addresses, and
2154 specify a port-range.
2156 JH/17 Bug 68: The spamd_address main option now supports an optional
2157 timeout value per server.
2159 JH/18 Bug 1581: Router and transport options headers_add/remove can
2160 now have the list separator specified.
2162 JH/19 Bug 392: spamd_address, and clamd av_scanner, now support retry
2165 JH/20 Bug 1571: Ensure that $tls_in_peerdn is set, when verification fails
2168 JH/21 Support for the A6 type of dns record is withdrawn.
2170 JH/22 Bug 608: The result of a QUIT or not-QUIT toplevel ACL now matters
2171 rather than the verbs used.
2173 JH/23 Bug 1572: Increase limit on SMTP confirmation message copy size
2174 from 255 to 1024 chars.
2176 JH/24 Verification callouts now attempt to use TLS by default.
2178 HS/01 DNSSEC options (dnssec_require_domains, dnssec_request_domains)
2179 are generic router options now. The defaults didn't change.
2181 JH/25 Bug 466: Add RFC2322 support for MIME attachment filenames.
2182 Original patch from Alexander Shikoff, worked over by JH.
2184 HS/02 Bug 1575: exigrep falls back to autodetection of compressed
2185 files if ZCAT_COMMAND is not executable.
2187 JH/26 Bug 1539: Add timeout/retry options on dnsdb lookups.
2189 JH/27 Bug 286: Support SOA lookup in dnsdb lookups.
2191 JH/28 Bug 1588: Do not use the A lookup following an AAAA for setting the FQDN.
2192 Normally benign, it bites when the pair was led to by a CNAME;
2193 modern usage is to not canonicalize the domain to a CNAME target
2194 (and we were inconsistent anyway for A-only vs AAAA+A).
2196 JH/29 Bug 1632: Removed the word "rejected" from line logged for ACL discards.
2198 JH/30 Check the forward DNS lookup for DNSSEC, in addition to the reverse,
2199 when evaluating $sender_host_dnssec.
2201 JH/31 Check the HELO verification lookup for DNSSEC, adding new
2202 $sender_helo_dnssec variable.
2204 JH/32 Bug 1397: Enable ECDHE on OpenSSL, just the NIST P-256 curve.
2206 JH/33 Bug 1346: Note MAIL cmd seen in -bS batch, to avoid smtp_no_mail log.
2208 JH/34 Bug 1648: Fix a memory leak seen with "mailq" and large queues.
2210 JH/35 Bug 1642: Fix support of $spam_ variables at delivery time. Was
2211 documented as working, but never had. Support all but $spam_report.
2213 JH/36 Bug 1659: Guard checking of input smtp commands again pseudo-command
2214 added for tls authenticator.
2216 HS/03 Add perl_taintmode main config option
2222 TL/01 When running the test suite, the README says that variables such as
2223 no_msglog_check are global and can be placed anywhere in a specific
2224 test's script, however it was observed that placement needed to be near
2225 the beginning for it to behave that way. Changed the runtest perl
2226 script to read through the entire script once to detect and set these
2227 variables, reset to the beginning of the script, and then run through
2228 the script parsing/test process like normal.
2230 TL/02 The BSD's have an arc4random API. One of the functions to induce
2231 adding randomness was arc4random_stir(), but it has been removed in
2232 OpenBSD 5.5. Detect this OpenBSD version and skip calling this
2233 function when detected.
2235 JH/01 Expand the EXPERIMENTAL_TPDA feature. Several different events now
2236 cause callback expansion.
2238 TL/03 Bugzilla 1518: Clarify "condition" processing in routers; that
2239 syntax errors in an expansion can be treated as a string instead of
2240 logging or causing an error, due to the internal use of bool_lax
2241 instead of bool when processing it.
2243 JH/02 Add EXPERIMENTAL_DANE, allowing for using the DNS as trust-anchor for
2244 server certificates when making smtp deliveries.
2246 JH/03 Support secondary-separator specifier for MX, SRV, TLSA lookups.
2248 JH/04 Add ${sort {list}{condition}{extractor}} expansion item.
2250 TL/04 Bugzilla 1216: Add -M (related messages) option to exigrep.
2252 TL/05 GitHub Issue 18: Adjust logic testing for true/false in redis lookups.
2253 Merged patch from Sebastian Wiedenroth.
2255 JH/05 Fix results-pipe from transport process. Several recipients, combined
2256 with certificate use, exposed issues where response data items split
2257 over buffer boundaries were not parsed properly. This eventually
2258 resulted in duplicates being sent. This issue only became common enough
2259 to notice due to the introduction of connection certificate information,
2260 the item size being so much larger. Found and fixed by Wolfgang Breyha.
2262 JH/06 Bug 1533: Fix truncation of items in headers_remove lists. A fixed
2263 size buffer was used, resulting in syntax errors when an expansion
2266 JH/07 Add support for directories of certificates when compiled with a GnuTLS
2267 version 3.3.6 or later.
2269 JH/08 Rename the TPDA experimental facility to Event Actions. The #ifdef
2270 is EXPERIMENTAL_EVENT, the main-configuration and transport options
2271 both become "event_action", the variables become $event_name, $event_data
2272 and $event_defer_errno. There is a new variable $verify_mode, usable in
2273 routers, transports and related events. The tls:cert event is now also
2274 raised for inbound connections, if the main configuration event_action
2277 TL/06 In test suite, disable OCSP for old versions of openssl which contained
2278 early OCSP support, but no stapling (appears to be less than 1.0.0).
2280 JH/09 When compiled with OpenSSL and EXPERIMENTAL_CERTNAMES, the checks on
2281 server certificate names available under the smtp transport option
2282 "tls_verify_cert_hostname" now do not permit multi-component wildcard
2285 JH/10 Time-related extraction expansions from certificates now use the main
2286 option "timezone" setting for output formatting, and are consistent
2287 between OpenSSL and GnuTLS compilations. Bug 1541.
2289 JH/11 Fix a crash in mime ACL when meeting a zero-length, quoted or RFC2047-
2290 encoded parameter in the incoming message. Bug 1558.
2292 JH/12 Bug 1527: Autogrow buffer used in reading spool files. Since they now
2293 include certificate info, eximon was claiming there were spoolfile
2296 JH/13 Bug 1521: Fix ldap lookup for single-attr request, multiple-attr return.
2298 JH/14 Log delivery-related information more consistently, using the sequence
2299 "H=<name> [<ip>]" wherever possible.
2301 TL/07 Bug 1547: Omit RFCs from release. Draft and RFCs have licenses which
2302 are problematic for Debian distribution, omit them from the release
2305 JH/15 Updates and fixes to the EXPERIMENTAL_DSN feature.
2307 JH/16 Fix string representation of time values on 64bit time_t architectures.
2310 JH/17 Fix a null-indirection in certextract expansions when a nondefault
2311 output list separator was used.
2316 TL/01 Bugzilla 1506: Re-add a 'return NULL' to silence complaints from static
2317 checkers that were complaining about end of non-void function with no
2320 JH/01 Bug 1513: Fix parsing of quoted parameter values in MIME headers.
2321 This was a regression introduced in 4.83 by another bugfix.
2323 JH/02 Fix broken compilation when EXPERIMENTAL_DSN is enabled.
2325 TL/02 Bug 1509: Fix exipick for enhanced spoolfile specification used when
2326 EXPERIMENTAL_DSN is enabled. Fix from Wolfgang Breyha.
2332 TF/01 Correctly close the server side of TLS when forking for delivery.
2334 When a message was received over SMTP with TLS, Exim failed to clear up
2335 the incoming connection properly after forking off the child process to
2336 deliver the message. In some situations the subsequent outgoing
2337 delivery connection happened to have the same fd number as the incoming
2338 connection previously had. Exim would try to use TLS and fail, logging
2339 a "Bad file descriptor" error.
2341 TF/02 Portability fix for building lookup modules on Solaris when the xpg4
2342 utilities have not been installed.
2344 JH/01 Fix memory-handling in use of acl as a conditional; avoid free of
2345 temporary space as the ACL may create new global variables.
2347 TL/01 LDAP support uses per connection or global context settings, depending
2348 upon the detected version of the libraries at build time.
2350 TL/02 Experimental Proxy Protocol support: allows a proxied SMTP connection
2351 to extract and use the src ip:port in logging and expansions as if it
2352 were a direct connection from the outside internet. PPv2 support was
2353 updated based on HAProxy spec change in May 2014.
2355 JH/02 Add ${listextract {number}{list}{success}{fail}}.
2357 TL/03 Bugzilla 1433: Fix DMARC SEGV with specific From header contents.
2358 Properly escape header and check for NULL return.
2360 PP/01 Continue incomplete 4.82 PP/19 by fixing docs too: use dns_dnssec_ok
2363 JH/03 Bugzilla 1157: support log_selector smtp_confirmation for lmtp.
2365 TL/04 Add verify = header_names_ascii check to reject email with non-ASCII
2366 characters in header names, implemented as a verify condition.
2367 Contributed by Michael Fischer v. Mollard.
2369 TL/05 Rename SPF condition results err_perm and err_temp to standardized
2370 results permerror and temperror. Previous values are deprecated but
2371 still accepted. In a future release, err_perm and err_temp will be
2372 completely removed, which will be a backward incompatibility if the
2373 ACL tests for either of these two old results. Patch contributed by
2374 user bes-internal on the mailing list.
2376 JH/04 Add ${utf8clean:} operator. Contributed by Alex Rau.
2378 JH/05 Bugzilla 305: Log incoming-TLS details on rejects, subject to log
2379 selectors, in both main and reject logs.
2381 JH/06 Log outbound-TLS and port details, subject to log selectors, for a
2384 JH/07 Add malware type "sock" for talking to simple daemon.
2386 JH/08 Bugzilla 1371: Add tls_{,try_}verify_hosts to smtp transport.
2388 JH/09 Bugzilla 1431: Support (with limitations) headers_add/headers_remove in
2389 routers/transports under cutthrough routing.
2391 JH/10 Bugzilla 1005: ACL "condition =" should accept values which are negative
2392 numbers. Touch up "bool" conditional to keep the same definition.
2394 TL/06 Remove duplicated language in spec file from 4.82 TL/16.
2396 JH/11 Add dnsdb tlsa lookup. From Todd Lyons.
2398 JH/12 Expand items in router/transport headers_add or headers_remove lists
2399 individually rather than the list as a whole. Bug 1452.
2401 Required for reasonable handling of multiple headers_ options when
2402 they may be empty; requires that headers_remove items with embedded
2403 colons must have them doubled (or the list-separator changed).
2405 TL/07 Add new dmarc expansion variable $dmarc_domain_policy to directly
2406 view the policy declared in the DMARC record. Currently, $dmarc_status
2407 is a combined value of both the record presence and the result of the
2410 JH/13 Fix handling of $tls_cipher et.al. in (non-verify) transport. Bug 1455.
2412 JH/14 New options dnssec_request_domains, dnssec_require_domains on the
2413 dnslookup router and the smtp transport (applying to the forward
2416 TL/08 Bugzilla 1453: New LDAP "SERVERS=" option allows admin to override list
2417 of ldap servers used for a specific lookup. Patch provided by Heiko
2420 JH/18 New options dnssec_lax, dnssec_strict on dnsdb lookups.
2421 New variable $lookup_dnssec_authenticated for observability.
2423 TL/09 Bugzilla 609: Add -C option to exiqgrep, specify which exim.conf to use.
2424 Patch submitted by Lars Timman.
2426 JH/19 EXPERIMENTAL_OCSP support under GnuTLS. Bug 1459.
2428 TL/10 Bugzilla 1454: New -oMm option to pass message reference to Exim.
2429 Requires trusted mode and valid format message id, aborts otherwise.
2430 Patch contributed by Heiko Schlichting.
2432 JH/20 New expansion variables tls_(in,out)_(our,peer)cert, and expansion item
2433 certextract with support for various fields. Bug 1358.
2435 JH/21 Observability of OCSP via variables tls_(in,out)_ocsp. Stapling
2436 is requested by default, modifiable by smtp transport option
2439 JH/22 Expansion operators ${md5:string} and ${sha1:string} can now
2440 operate on certificate variables to give certificate fingerprints
2441 Also new ${sha256:cert_variable}.
2443 JH/23 The PRDR feature is moved from being Experimental into the mainline.
2445 TL/11 Bug 1119: fix memory allocation in string_printing2(). Patch from
2446 Christian Aistleitner.
2448 JH/24 The OCSP stapling feature is moved from Experimental into the mainline.
2450 TL/12 Bug 1444: Fix improper \r\n sequence handling when writing spool
2451 file. Patch from Wolfgang Breyha.
2453 JH/25 Expand the coverage of the delivery $host and $host_address to
2454 client authenticators run in verify callout. Bug 1476.
2456 JH/26 Port service names are now accepted for tls_on_connect_ports, to
2457 align with daemon_smtp_ports. Bug 72.
2459 TF/03 Fix udpsend. The ip_connectedsocket() function's socket type
2460 support and error reporting did not work properly.
2462 TL/13 Bug 1495: Exiqgrep check if -C config file specified on cli exists
2463 and is readable. Patch from Andrew Colin Kissa.
2465 TL/14 Enhance documentation of ${run expansion and how it parses the
2466 commandline after expansion, particularly in the case when an
2467 unquoted variable expansion results in an empty value.
2469 JH/27 The TLS SNI feature was broken in 4.82. Fix it.
2471 PP/02 Fix internal collision of T_APL on systems which support RFC3123
2472 by renaming away from it. Addresses GH issue 15, reported by
2475 JH/28 Fix parsing of MIME headers for parameters with quoted semicolons.
2477 TL/15 SECURITY: prevent double expansion in math comparison functions
2478 (can expand unsanitized data). Not remotely exploitable.
2485 PP/01 Add -bI: framework, and -bI:sieve for querying sieve capabilities.
2487 PP/02 Make -n do something, by making it not do something.
2488 When combined with -bP, the name of an option is not output.
2490 PP/03 Added tls_dh_min_bits SMTP transport driver option, only honoured
2493 PP/04 First step towards DNSSEC, provide $sender_host_dnssec for
2494 $sender_host_name and config options to manage this, and basic check
2497 PP/05 DSCP support for outbound connections and control modifier for inbound.
2499 PP/06 Cyrus SASL: set local and remote IP;port properties for driver.
2500 (Only plugin which currently uses this is kerberos4, which nobody should
2501 be using, but we should make it available and other future plugins might
2502 conceivably use it, even though it would break NAT; stuff *should* be
2503 using channel bindings instead).
2505 PP/07 Handle "exim -L <tag>" to indicate to use syslog with tag as the process
2506 name; added for Sendmail compatibility; requires admin caller.
2507 Handle -G as equivalent to "control = suppress_local_fixups" (we used to
2508 just ignore it); requires trusted caller.
2509 Also parse but ignore: -Ac -Am -X<logfile>
2512 TL/01 Bugzilla 1258 - Refactor MAIL FROM optional args processing.
2514 TL/02 Add +smtp_confirmation as a default logging option.
2516 TL/03 Bugzilla 198 - Implement remove_header ACL modifier.
2517 Patch by Magnus Holmgren from 2007-02-20.
2519 TL/04 Bugzilla 1281 - Spec typo.
2520 Bugzilla 1283 - Spec typo.
2521 Bugzilla 1290 - Spec grammar fixes.
2523 TL/05 Bugzilla 1285 - Spec omission, fix docbook errors for spec.txt creation.
2525 TL/06 Add Experimental DMARC support using libopendmarc libraries.
2527 TL/07 Fix an out of order global option causing a segfault. Reported to dev
2528 mailing list by by Dmitry Isaikin.
2530 JH/01 Bugzilla 1201 & 304 - New cutthrough-delivery feature, with TLS support.
2532 JH/02 Support "G" suffix to numbers in ${if comparisons.
2534 PP/08 Handle smtp transport tls_sni option forced-fail for OpenSSL.
2536 NM/01 Bugzilla 1197 - Spec typo
2537 Bugzilla 1196 - Spec examples corrections
2539 JH/03 Add expansion operators ${listnamed:name} and ${listcount:string}
2541 PP/09 Add gnutls_allow_auto_pkcs11 option (was originally called
2542 gnutls_enable_pkcs11, but renamed to more accurately indicate its
2545 PP/10 Let Linux makefile inherit CFLAGS/CFLAGS_DYNAMIC.
2546 Pulled from Debian 30_dontoverridecflags.dpatch by Andreas Metzler.
2548 JH/04 Add expansion item ${acl {name}{arg}...}, expansion condition
2549 "acl {{name}{arg}...}", and optional args on acl condition
2552 JH/05 Permit multiple router/transport headers_add/remove lines.
2554 JH/06 Add dnsdb pseudo-lookup "a+" to do an "aaaa" + "a" combination.
2556 JH/07 Avoid using a waiting database for a single-message-only transport.
2557 Performance patch from Paul Fisher. Bugzilla 1262.
2559 JH/08 Strip leading/trailing newlines from add_header ACL modifier data.
2562 JH/09 Add $headers_added variable, with content from use of ACL modifier
2563 add_header (but not yet added to the message). Bugzilla 199.
2565 JH/10 Add 8bitmime log_selector, for 8bitmime status on the received line.
2566 Pulled from Bugzilla 817 by Wolfgang Breyha.
2568 PP/11 SECURITY: protect DKIM DNS decoding from remote exploit.
2570 (nb: this is the same fix as in Exim 4.80.1)
2572 JH/11 Add A= logging on delivery lines, and a client_set_id option on
2575 JH/12 Add optional authenticated_sender logging to A= and a log_selector
2578 PP/12 Unbreak server_set_id for NTLM/SPA auth, broken by 4.80 PP/29.
2580 PP/13 Dovecot auth: log better reason to rejectlog if Dovecot did not
2581 advertise SMTP AUTH mechanism to us, instead of a generic
2582 protocol violation error. Also, make Exim more robust to bad
2583 data from the Dovecot auth socket.
2585 TF/01 Fix ultimate retry timeouts for intermittently deliverable recipients.
2587 When a queue runner is handling a message, Exim first routes the
2588 recipient addresses, during which it prunes them based on the retry
2589 hints database. After that it attempts to deliver the message to
2590 any remaining recipients. It then updates the hints database using
2593 So if a recipient address works intermittently, it can get repeatedly
2594 deferred at routing time. The retry hints record remains fresh so the
2595 address never reaches the final cutoff time.
2597 This is a fairly common occurrence when a user is bumping up against
2598 their storage quota. Exim had some logic in its local delivery code
2599 to deal with this. However it did not apply to per-recipient defers
2600 in remote deliveries, e.g. over LMTP to a separate IMAP message store.
2602 This change adds a proper retry rule check during routing so that the
2603 final cutoff time is checked against the message's age. We only do
2604 this check if there is an address retry record and there is not a
2605 domain retry record; this implies that previous attempts to handle
2606 the address had the retry_use_local_parts option turned on. We use
2607 this as an approximation for the destination being like a local
2608 delivery, as in LMTP.
2610 I suspect this new check makes the old local delivery cutoff check
2611 redundant, but I have not verified this so I left the code in place.
2613 TF/02 Correct gecos expansion when From: is a prefix of the username.
2615 Test 0254 submits a message to Exim with the header
2619 When I ran the test suite under the user fanf2, Exim expanded
2620 the header to contain my full name, whereas it should have added
2621 a Resent-Sender: header. It erroneously treats any prefix of the
2622 username as equal to the username.
2624 This change corrects that bug.
2626 GF/01 DCC debug and logging tidyup
2627 Error conditions log to paniclog rather than rejectlog.
2628 Debug lines prefixed by "DCC: " to remove any ambiguity.
2630 TF/03 Avoid unnecessary rebuilds of lookup-related code.
2632 PP/14 Fix OCSP reinitialisation in SNI handling for Exim/TLS as server.
2633 Bug spotted by Jeremy Harris; was flawed since initial commit.
2634 Would have resulted in OCSP responses post-SNI triggering an Exim
2635 NULL dereference and crash.
2637 JH/13 Add $router_name and $transport_name variables. Bugzilla 308.
2639 PP/15 Define SIOCGIFCONF_GIVES_ADDR for GNU Hurd.
2640 Bug detection, analysis and fix by Samuel Thibault.
2641 Bugzilla 1331, Debian bug #698092.
2643 SC/01 Update eximstats to watch out for senders sending 'HELO [IpAddr]'
2645 JH/14 SMTP PRDR (http://www.eric-a-hall.com/specs/draft-hall-prdr-00.txt).
2646 Server implementation by Todd Lyons, client by JH.
2647 Only enabled when compiled with EXPERIMENTAL_PRDR. A new
2648 config variable "prdr_enable" controls whether the server
2649 advertises the facility. If the client requests PRDR a new
2650 acl_data_smtp_prdr ACL is called once for each recipient, after
2651 the body content is received and before the acl_smtp_data ACL.
2652 The client is controlled by both of: a hosts_try_prdr option
2653 on the smtp transport, and the server advertisement.
2654 Default client logging of deliveries and rejections involving
2655 PRDR are flagged with the string "PRDR".
2657 PP/16 Fix problems caused by timeouts during quit ACLs trying to double
2658 fclose(). Diagnosis by Todd Lyons.
2660 PP/17 Update configure.default to handle IPv6 localhost better.
2661 Patch by Alain Williams (plus minor tweaks).
2664 PP/18 OpenSSL made graceful with empty tls_verify_certificates setting.
2665 This is now consistent with GnuTLS, and is now documented: the
2666 previous undocumented portable approach to treating the option as
2667 unset was to force an expansion failure. That still works, and
2668 an empty string is now equivalent.
2670 PP/19 Renamed DNSSEC-enabling option to "dns_dnssec_ok", to make it
2671 clearer that Exim is using the DO (DNSSEC OK) EDNS0 resolver flag,
2672 not performing validation itself.
2674 PP/20 Added force_command boolean option to pipe transport.
2675 Patch from Nick Koston, of cPanel Inc.
2677 JH/15 AUTH support on callouts (and hence cutthrough-deliveries).
2680 TF/04 Added udpsend ACL modifier and hexquote expansion operator
2682 PP/21 Fix eximon continuous updating with timestamped log-files.
2683 Broken in a format-string cleanup in 4.80, missed when I repaired the
2684 other false fix of the same issue.
2685 Report and fix from Heiko Schlichting.
2688 PP/22 Guard LDAP TLS usage against Solaris LDAP variant.
2689 Report from Prashanth Katuri.
2691 PP/23 Support safari_ecdhe_ecdsa_bug for openssl_options.
2692 It's SecureTransport, so affects any MacOS clients which use the
2693 system-integrated TLS libraries, including email clients.
2695 PP/24 Fix segfault from trying to fprintf() to a NULL stdio FILE* if
2696 using a MIME ACL for non-SMTP local injection.
2697 Report and assistance in diagnosis by Warren Baker.
2699 TL/08 Adjust exiqgrep to be case-insensitive for sender/receiver.
2701 JH/16 Fix comparisons for 64b. Bugzilla 1385.
2703 TL/09 Add expansion variable $authenticated_fail_id to keep track of
2704 last id that failed so it may be referenced in subsequent ACL's.
2706 TL/10 Bugzilla 1375 - Prevent TLS rebinding in ldap. Patch provided by
2709 TL/11 Bugzilla 1382 - Option ldap_require_cert overrides start_tls
2710 ldap library initialization, allowing self-signed CA's to be
2711 used. Also properly sets require_cert option later in code by
2712 using NULL (global ldap config) instead of ldap handle (per
2713 session). Bug diagnosis and testing by alxgomz.
2715 TL/12 Enhanced documentation in the ratelimit.pl script provided in
2716 the src/util/ subdirectory.
2718 TL/13 Bug 1031 - Imported transport SQL logging patch from Axel Rau
2719 renamed to Transport Post Delivery Action by Jeremy Harris, as
2722 TL/14 Bugzilla 1217 - Redis lookup support has been added. It is only enabled
2723 when Exim is compiled with EXPERIMENTAL_REDIS. A new config variable
2724 redis_servers = needs to be configured which will be used by the redis
2725 lookup. Patch from Warren Baker, of The Packet Hub.
2727 TL/15 Fix exiqsumm summary for corner case. Patch provided by Richard Hall.
2729 TL/16 Bugzilla 1289 - Clarify host/ip processing when have errors looking up a
2730 hostname or reverse DNS when processing a host list. Used suggestions
2731 from multiple comments on this bug.
2733 TL/17 Bugzilla 1057 - Multiple clamd TCP targets patch from Mark Zealey.
2735 TL/18 Had previously added a -CONTINUE option to runtest in the test suite.
2736 Missed a few lines, added it to make the runtest require no keyboard
2739 TL/19 Bugzilla 1402 - Test 533 fails if any part of the path to the test suite
2740 contains upper case chars. Make router use caseful_local_part.
2742 TL/20 Bugzilla 1400 - Add AVOID_GNUTLS_PKCS11 build option. Allows GnuTLS
2743 support when GnuTLS has been built with p11-kit.
2749 PP/01 SECURITY: protect DKIM DNS decoding from remote exploit.
2751 This, or similar/improved, will also be change PP/11 of 4.82.
2757 PP/01 Handle short writes when writing local log-files.
2758 In practice, only affects FreeBSD (8 onwards).
2759 Bugzilla 1053, with thanks to Dmitry Isaikin.
2761 NM/01 Bugzilla 949 - Documentation tweak
2763 NM/02 Bugzilla 1093 - eximstats DATA reject detection regexps
2766 NM/03 Bugzilla 1169 - primary_hostname spelling was incorrect in docs.
2768 PP/02 Implemented gsasl authenticator.
2770 PP/03 Implemented heimdal_gssapi authenticator with "server_keytab" option.
2772 PP/04 Local/Makefile support for (AUTH|LOOKUP)_*_PC=foo to use
2773 `pkg-config foo` for cflags/libs.
2775 PP/05 Swapped $auth1/$auth2 for gsasl GSSAPI mechanism, to be more consistent
2776 with rest of GSASL and with heimdal_gssapi.
2778 PP/06 Local/Makefile support for USE_(GNUTLS|OPENSSL)_PC=foo to use
2779 `pkg-config foo` for cflags/libs for the TLS implementation.
2781 PP/07 New expansion variable $tls_bits; Cyrus SASL server connection
2782 properties get this fed in as external SSF. A number of robustness
2783 and debugging improvements to the cyrus_sasl authenticator.
2785 PP/08 cyrus_sasl server now expands the server_realm option.
2787 PP/09 Bugzilla 1214 - Log authentication information in reject log.
2788 Patch by Jeremy Harris.
2790 PP/10 Added dbmjz lookup type.
2792 PP/11 Let heimdal_gssapi authenticator take a SASL message without an authzid.
2794 PP/12 MAIL args handles TAB as well as SP, for better interop with
2795 non-compliant senders.
2796 Analysis and variant patch by Todd Lyons.
2798 NM/04 Bugzilla 1237 - fix cases where printf format usage not indicated
2799 Bug report from Lars Müller <lars@samba.org> (via SUSE),
2800 Patch from Dirk Mueller <dmueller@suse.com>
2802 PP/13 tls_peerdn now print-escaped for spool files.
2803 Observed some $tls_peerdn in wild which contained \n, which resulted
2804 in spool file corruption.
2806 PP/14 TLS fixes for OpenSSL: support TLS 1.1 & 1.2; new "openssl_options"
2807 values; set SSL_MODE_AUTO_RETRY so that OpenSSL will retry a read
2808 or write after TLS renegotiation, which otherwise led to messages
2811 TK/01 Bugzilla 1239 - fix DKIM verification when signature was not inserted
2812 as a tracking header (ie: a signed header comes before the signature).
2813 Patch from Wolfgang Breyha.
2815 JH/01 Bugzilla 660 - Multi-valued attributes from ldap now parseable as a
2816 comma-sep list; embedded commas doubled.
2818 JH/02 Refactored ACL "verify =" logic to table-driven dispatch.
2820 PP/15 LDAP: Check for errors of TLS initialisation, to give correct
2822 Report and patch from Dmitry Banschikov.
2824 PP/16 Removed "dont_insert_empty_fragments" from "openssl_options".
2825 Removed SSL_clear() after SSL_new() which led to protocol negotiation
2826 failures. We appear to now support TLS1.1+ with Exim.
2828 PP/17 OpenSSL: new expansion var $tls_sni, which if used in tls_certificate
2829 lets Exim select keys and certificates based upon TLS SNI from client.
2830 Also option tls_sni on SMTP Transports. Also clear $tls_bits correctly
2831 before an outbound SMTP session. New log_selector, +tls_sni.
2833 PP/18 Bugzilla 1122 - check localhost_number expansion for failure, avoid
2834 NULL dereference. Report and patch from Alun Jones.
2836 PP/19 DNS resolver init changes for NetBSD compatibility. (Risk of breakage
2837 on less well tested platforms). Obviates NetBSD pkgsrc patch-ac.
2838 Not seeing resolver debug output on NetBSD, but suspect this is a
2839 resolver implementation change.
2841 PP/20 Revert part of NM/04, it broke log_path containing %D expansions.
2842 Left warnings. Added "eximon gdb" invocation mode.
2844 PP/21 Defaulting "accept_8bitmime" to true, not false.
2846 PP/22 Added -bw for inetd wait mode support.
2848 PP/23 Added PCRE_CONFIG=yes support to Makefile for using pcre-config to
2849 locate the relevant includes and libraries. Made this the default.
2851 PP/24 Fixed headers_only on smtp transports (was not sending trailing dot).
2852 Bugzilla 1246, report and most of solution from Tomasz Kusy.
2854 JH/03 ${eval } now uses 64-bit and supports a "g" suffix (like to "k" and "m").
2855 This may cause build issues on older platforms.
2857 PP/25 Revamped GnuTLS support, passing tls_require_ciphers to
2858 gnutls_priority_init, ignoring Exim options gnutls_require_kx,
2859 gnutls_require_mac & gnutls_require_protocols (no longer supported).
2860 Added SNI support via GnuTLS too.
2861 Made ${randint:..} supplier available, if using not-too-old GnuTLS.
2863 PP/26 Added EXPERIMENTAL_OCSP for OpenSSL.
2865 PP/27 Applied dnsdb SPF support patch from Janne Snabb.
2866 Applied second patch from Janne, implementing suggestion to default
2867 multiple-strings-in-record handling to match SPF spec.
2869 JH/04 Added expansion variable $tod_epoch_l for a higher-precision time.
2871 PP/28 Fix DCC dcc_header content corruption (stack memory referenced,
2872 read-only, out of scope).
2873 Patch from Wolfgang Breyha, report from Stuart Northfield.
2875 PP/29 Fix three issues highlighted by clang analyser static analysis.
2876 Only crash-plausible issue would require the Cambridge-specific
2877 iplookup router and a misconfiguration.
2878 Report from Marcin Mirosław.
2880 PP/30 Another attempt to deal with PCRE_PRERELEASE, this one less buggy.
2882 PP/31 %D in printf continues to cause issues (-Wformat=security), so for
2883 now guard some of the printf checks behind WANT_DEEPER_PRINTF_CHECKS.
2884 As part of this, removing so much warning spew let me fix some minor
2885 real issues in debug logging.
2887 PP/32 GnuTLS was always using default tls_require_ciphers, due to a missing
2888 assignment on my part. Fixed.
2890 PP/33 Added tls_dh_max_bits option, defaulting to current hard-coded limit
2891 of NSS, for GnuTLS/NSS interop. Problem root cause diagnosis by
2892 Janne Snabb (who went above and beyond: thank you).
2894 PP/34 Validate tls_require_ciphers on startup, since debugging an invalid
2895 string otherwise requires a connection and a bunch more work and it's
2896 relatively easy to get wrong. Should also expose TLS library linkage
2899 PP/35 Pull in <features.h> on Linux, for some portability edge-cases of
2900 64-bit ${eval} (JH/03).
2902 PP/36 Define _GNU_SOURCE in exim.h; it's needed for some releases of
2903 GNU libc to support some of the 64-bit stuff, should not lead to
2904 conflicts. Defined before os.h is pulled in, so if a given platform
2905 needs to override this, it can.
2907 PP/37 Unbreak Cyrus SASL auth: SSF retrieval was incorrect, Exim thought
2908 protection layer was required, which is not implemented.
2909 Bugzilla 1254, patch from Wolfgang Breyha.
2911 PP/38 Overhaul DH prime handling, supply RFC-specified DH primes as built
2912 into Exim, default to IKE id 23 from RFC 5114 (2048 bit). Make
2913 tls_dhparam take prime identifiers. Also unbreak combination of
2914 OpenSSL+DH_params+TLSSNI.
2916 PP/39 Disable SSLv2 by default in OpenSSL support.
2922 PP/01 Solaris build fix for Oracle's LDAP libraries.
2923 Bugzilla 1109, patch from Stephen Usher.
2925 TF/01 HP/UX build fix: avoid arithmetic on a void pointer.
2927 TK/01 DKIM Verification: Fix relaxed canon for empty headers w/o
2930 TF/02 Fix a couple more cases where we did not log the error message
2931 when unlink() failed. See also change 4.74-TF/03.
2933 TF/03 Make the exiwhat support code safe for signals. Previously Exim might
2934 lock up or crash if it happened to be inside a call to libc when it
2935 got a SIGUSR1 from exiwhat.
2937 The SIGUSR1 handler appends the current process status to the process
2938 log which is later printed by exiwhat. It used to use the general
2939 purpose logging code to do this, but several functions it calls are
2940 not safe for signals.
2942 The new output code in the SIGUSR1 handler is specific to the process
2943 log, and simple enough that it's easy to inspect for signal safety.
2944 Removing some special cases also simplifies the general logging code.
2945 Removing the spurious timestamps from the process log simplifies
2948 TF/04 Improved ratelimit ACL condition.
2950 The /noupdate option has been deprecated in favour of /readonly which
2951 has clearer semantics. The /leaky, /strict, and /readonly update modes
2952 are mutually exclusive. The update mode is no longer included in the
2953 database key; it just determines when the database is updated. (This
2954 means that when you upgrade Exim will forget old rate measurements.)
2956 Exim now checks that the per_* options are used with an update mode that
2957 makes sense for the current ACL. For example, when Exim is processing a
2958 message (e.g. acl_smtp_rcpt or acl_smtp_data, etc.) you can specify
2959 per_mail/leaky or per_mail/strict; otherwise (e.g. in acl_smtp_helo) you
2960 must specify per_mail/readonly. If you omit the update mode it defaults to
2961 /leaky where that makes sense (as before) or /readonly where required.
2963 The /noupdate option is now undocumented but still supported for
2964 backwards compatibility. It is equivalent to /readonly except that in
2965 ACLs where /readonly is required you may specify /leaky/noupdate or
2966 /strict/noupdate which are treated the same as /readonly.
2968 A useful new feature is the /count= option. This is a generalization
2969 of the per_byte option, so that you can measure the throughput of other
2970 aggregate values. For example, the per_byte option is now equivalent
2971 to per_mail/count=${if >{0}{$message_size} {0} {$message_size} }.
2973 The per_rcpt option has been generalized using the /count= mechanism
2974 (though it's more complicated than the per_byte equivalence). When it is
2975 used in acl_smtp_rcpt, the per_rcpt option adds recipients to the
2976 measured rate one at a time; if it is used later (e.g. in acl_smtp_data)
2977 or in a non-SMTP ACL it adds all the recipients in one go. (The latter
2978 /count=$recipients_count behaviour used to work only in non-SMTP ACLs.)
2979 Note that using per_rcpt with a non-readonly update mode in more than
2980 one ACL will cause the recipients to be double-counted. (The per_mail
2981 and per_byte options don't have this problem.)
2983 The handling of very low rates has changed slightly. If the computed rate
2984 is less than the event's count (usually one) then this event is the first
2985 after a long gap. In this case the rate is set to the same as this event's
2986 count, so that the first message of a spam run is counted properly.
2988 The major new feature is a mechanism for counting the rate of unique
2989 events. The new per_addr option counts the number of different
2990 recipients that someone has sent messages to in the last time period. It
2991 behaves like per_rcpt if all the recipient addresses are different, but
2992 duplicate recipient addresses do not increase the measured rate. Like
2993 the /count= option this is a general mechanism, so the per_addr option
2994 is equivalent to per_rcpt/unique=$local_part@$domain. You can, for
2995 example, measure the rate that a client uses different sender addresses
2996 with the options per_mail/unique=$sender_address. There are further
2997 details in the main documentation.
2999 TF/05 Removed obsolete $Cambridge$ CVS revision strings.
3001 TF/06 Removed a few PCRE remnants.
3003 TF/07 Automatically extract Exim's version number from tags in the git
3004 repository when doing development or release builds.
3006 PP/02 Raise smtp_cmd_buffer_size to 16kB.
3007 Bugzilla 879. Patch from Paul Fisher.
3009 PP/03 Implement SSL-on-connect outbound with protocol=smtps on smtp transport.
3010 Heavily based on revision 40f9a89a from Simon Arlott's tree.
3013 PP/04 Use .dylib instead of .so for dynamic library loading on MacOS.
3015 PP/05 Variable $av_failed, true if the AV scanner deferred.
3016 Bugzilla 1078. Patch from John Horne.
3018 PP/06 Stop make process more reliably on build failure.
3019 Bugzilla 1087. Patch from Heiko Schlittermann.
3021 PP/07 Make maildir_use_size_file an _expandable_ boolean.
3022 Bugzilla 1089. Patch from Heiko Schlittermann.
3024 PP/08 Handle ${run} returning more data than OS pipe buffer size.
3025 Bugzilla 1131. Patch from Holger Weiß.
3027 PP/09 Handle IPv6 addresses with SPF.
3028 Bugzilla 860. Patch from Wolfgang Breyha.
3030 PP/10 GnuTLS: support TLS 1.2 & 1.1.
3032 Use gnutls_certificate_verify_peers2() [patch from Andreas Metzler].
3035 PP/11 match_* no longer expand right-hand-side by default.
3036 New compile-time build option, EXPAND_LISTMATCH_RHS.
3037 New expansion conditions, "inlist", "inlisti".
3039 PP/12 fix uninitialised greeting string from PP/03 (smtps client support).
3041 PP/13 shell and compiler warnings fixes for RC1-RC4 changes.
3043 PP/14 fix log_write() format string regression from TF/03.
3044 Bugzilla 1152. Patch from Dmitry Isaikin.
3050 PP/01 The new ldap_require_cert option would segfault if used. Fixed.
3052 PP/02 Harmonised TLS library version reporting; only show if debugging.
3053 Layout now matches that introduced for other libraries in 4.74 PP/03.
3055 PP/03 New openssl_options items: no_sslv2 no_sslv3 no_ticket no_tlsv1
3057 PP/04 New "dns_use_edns0" global option.
3059 PP/05 Don't segfault on misconfiguration of ref:name exim-user as uid.
3062 PP/06 Extra paranoia around buffer usage at the STARTTLS transition.
3063 nb: Exim is not vulnerable to http://www.kb.cert.org/vuls/id/555316
3065 TK/01 Updated PolarSSL code to 0.14.2.
3066 Bugzilla 1097. Patch from Andreas Metzler.
3068 PP/07 Catch divide-by-zero in ${eval:...}.
3069 Fixes bugzilla 1102.
3071 PP/08 Condition negation of bool{}/bool_lax{} did not negate. Fixed.
3074 TK/02 Bugzilla 1106: CVE-2011-1764 - DKIM log line was subject to a
3075 format-string attack -- SECURITY: remote arbitrary code execution.
3077 TK/03 SECURITY - DKIM signature header parsing was double-expanded, second
3078 time unintentionally subject to list matching rules, letting the header
3079 cause arbitrary Exim lookups (of items which can occur in lists, *not*
3080 arbitrary string expansion). This allowed for information disclosure.
3082 PP/09 Fix another SIGFPE (x86) in ${eval:...} expansion, this time related to
3083 INT_MIN/-1 -- value coerced to INT_MAX.
3089 NM/01 Workaround for PCRE version dependency in version reporting
3092 TF/01 Update valgrind.h and memcheck.h to copies from valgrind-3.6.0.
3093 This fixes portability to compilers other than gcc, notably
3094 Solaris CC and HP-UX CC. Fixes Bugzilla 1050.
3096 TF/02 Bugzilla 139: Avoid using the += operator in the modular lookup
3097 makefiles for portability to HP-UX and POSIX correctness.
3099 PP/01 Permit LOOKUP_foo enabling on the make command-line.
3100 Also via indented variable definition in the Makefile.
3101 (Debugging by Oliver Heesakkers).
3103 PP/02 Restore caching of spamd results with expanded spamd_address.
3104 Patch from author of expandable spamd_address patch, Wolfgang Breyha.
3106 PP/03 Build issue: lookups-Makefile now exports LC_ALL=C
3107 Improves build reliability. Fix from: Frank Elsner
3109 NM/02 Fix wide character breakage in the rfc2047 coding
3110 Fixes bug 1064. Patch from Andrey N. Oktyabrski
3112 NM/03 Allow underscore in dnslist lookups
3113 Fixes bug 1026. Patch from Graeme Fowler
3115 PP/04 Bugzilla 230: Support TLS-enabled LDAP (in addition to ldaps).
3116 Code patches from Adam Ciarcinski of NetBSD.
3118 NM/04 Fixed exiqgrep to cope with mailq missing size issue
3121 PP/05 Bugzilla 1083: when lookup expansion defers, escape the output which
3122 is logged, to avoid truncation. Patch from John Horne.
3124 PP/06 Bugzilla 1042: implement freeze_signal on pipe transports.
3125 Patch from Jakob Hirsch.
3127 PP/07 Bugzilla 1061: restrict error messages sent over SMTP to not reveal
3128 SQL string expansion failure details.
3129 Patch from Andrey Oktyabrski.
3131 PP/08 Bugzilla 486: implement %M datestamping in log filenames.
3132 Patch from Simon Arlott.
3134 PP/09 New lookups functionality failed to compile on old gcc which rejects
3135 extern declarations in function scope.
3136 Patch from Oliver Fleischmann
3138 PP/10 Use sig_atomic_t for flags set from signal handlers.
3139 Check getgroups() return and improve debugging.
3140 Fixed developed for diagnosis in bug 927 (which turned out to be
3143 PP/11 Bugzilla 1055: Update $message_linecount for maildir_tag.
3144 Patch from Mark Zealey.
3146 PP/12 Bugzilla 1056: Improved spamd server selection.
3147 Patch from Mark Zealey.
3149 PP/13 Bugzilla 1086: Deal with maildir quota file races.
3150 Based on patch from Heiko Schlittermann.
3152 PP/14 Bugzilla 1019: DKIM multiple signature generation fix.
3153 Patch from Uwe Doering, sign-off by Michael Haardt.
3155 NM/05 Fix to spam.c to accommodate older gcc versions which dislike
3156 variable declaration deep within a block. Bug and patch from
3159 PP/15 lookups-Makefile IRIX compatibility coercion.
3161 PP/16 Make DISABLE_DKIM build knob functional.
3163 NM/06 Bugzilla 968: child_open_uid: restore default SIGPIPE handler
3164 Patch by Simon Arlott
3166 TF/03 Fix valgrind.h portability to C89 compilers that do not support
3167 variable argument macros. Our copy now differs from upstream.
3173 TF/01 Failure to get a lock on a hints database can have serious
3174 consequences so log it to the panic log.
3176 TF/02 Log LMTP confirmation messages in the same way as SMTP,
3177 controlled using the smtp_confirmation log selector.
3179 TF/03 Include the error message when we fail to unlink a spool file.
3181 DW/01 Bugzilla 139: Support dynamically loaded lookups as modules.
3182 With thanks to Steve Haslam, Johannes Berg & Serge Demonchaux
3183 for maintaining out-of-tree patches for some time.
3185 PP/01 Bugzilla 139: Documentation and portability issues.
3186 Avoid GNU Makefile-isms, let Exim continue to build on BSD.
3187 Handle per-OS dynamic-module compilation flags.
3189 PP/02 Let /dev/null have normal permissions.
3190 The 4.73 fixes were a little too stringent and complained about the
3191 permissions on /dev/null. Exempt it from some checks.
3192 Reported by Andreas M. Kirchwitz.
3194 PP/03 Report version information for many libraries, including
3195 Exim version information for dynamically loaded libraries. Created
3196 version.h, now support a version extension string for distributors
3197 who patch heavily. Dynamic module ABI change.
3199 PP/04 CVE-2011-0017 - check return value of setuid/setgid. This is a
3200 privilege escalation vulnerability whereby the Exim run-time user
3201 can cause root to append content of the attacker's choosing to
3204 PP/05 Bugzilla 1041: merged DCC maintainer's fixes for return code.
3207 PP/06 Bugzilla 1071: fix delivery logging with untrusted macros.
3208 If dropping privileges for untrusted macros, we disabled normal logging
3209 on the basis that it would fail; for the Exim run-time user, this is not
3210 the case, and it resulted in successful deliveries going unlogged.
3211 Fixed. Reported by Andreas Metzler.
3217 PP/01 Date: & Message-Id: revert to normally being appended to a message,
3218 only prepend for the Resent-* case. Fixes regression introduced in
3219 Exim 4.70 by NM/22 for Bugzilla 607.
3221 PP/02 Include check_rfc2047_length in configure.default because we're seeing
3222 increasing numbers of administrators be bitten by this.
3224 JJ/01 Added DISABLE_DKIM and comment to src/EDITME
3226 PP/03 Bugzilla 994: added openssl_options main configuration option.
3228 PP/04 Bugzilla 995: provide better SSL diagnostics on failed reads.
3230 PP/05 Bugzilla 834: provide a permit_coredump option for pipe transports.
3232 PP/06 Adjust NTLM authentication to handle SASL Initial Response.
3234 PP/07 If TLS negotiated an anonymous cipher, we could end up with SSL but
3235 without a peer certificate, leading to a segfault because of an
3236 assumption that peers always have certificates. Be a little more
3237 paranoid. Problem reported by Martin Tscholak.
3239 PP/08 Bugzilla 926: switch ClamAV to use the new zINSTREAM API for content
3240 filtering; old API available if built with WITH_OLD_CLAMAV_STREAM=yes
3241 NB: ClamAV planning to remove STREAM in "middle of 2010".
3242 CL also introduces -bmalware, various -d+acl logging additions and
3243 more caution in buffer sizes.
3245 PP/09 Implemented reverse_ip expansion operator.
3247 PP/10 Bugzilla 937: provide a "debug" ACL control.
3249 PP/11 Bugzilla 922: Documentation dusting, patch provided by John Horne.
3251 PP/12 Bugzilla 973: Implement --version.
3253 PP/13 Bugzilla 752: Refuse to build/run if Exim user is root/0.
3255 PP/14 Build without WITH_CONTENT_SCAN. Path from Andreas Metzler.
3257 PP/15 Bugzilla 816: support multiple condition rules on Routers.
3259 PP/16 Add bool_lax{} expansion operator and use that for combining multiple
3260 condition rules, instead of bool{}. Make both bool{} and bool_lax{}
3261 ignore trailing whitespace.
3263 JJ/02 prevent non-panic DKIM error from being sent to paniclog
3265 JJ/03 added tcp_wrappers_daemon_name to allow host entries other than
3268 PP/17 Fix malware regression for cmdline scanner introduced in PP/08.
3269 Notification from Dr Andrew Aitchison.
3271 PP/18 Change ClamAV response parsing to be more robust and to handle ClamAV's
3272 ExtendedDetectionInfo response format.
3273 Notification from John Horne.
3275 PP/19 OpenSSL 1.0.0a compatibility const-ness change, should be backwards
3278 PP/20 Added a CONTRIBUTING file. Fixed the documentation build to use http:
3279 XSL and documented dependency on system catalogs, with examples of how
3282 DW/21 Added Valgrind hooks in store.c to help it capture out-of-bounds store
3285 DW/22 Bugzilla 1044: CVE-2010-4345 - partial fix: restrict default behaviour
3286 of CONFIGURE_OWNER and CONFIGURE_GROUP options to no longer allow a
3287 configuration file which is writeable by the Exim user or group.
3289 DW/23 Bugzilla 1044: CVE-2010-4345 - part two: extend checks for writeability
3290 of configuration files to cover files specified with the -C option if
3291 they are going to be used with root privileges, not just the default
3294 DW/24 Bugzilla 1044: CVE-2010-4345 - part three: remove ALT_CONFIG_ROOT_ONLY
3295 option (effectively making it always true).
3297 DW/25 Add TRUSTED_CONFIG_PREFIX_FILE option to allow alternative configuration
3298 files to be used while preserving root privileges.
3300 DW/26 Set FD_CLOEXEC on SMTP sockets after forking in the daemon, to ensure
3301 that rogue child processes cannot use them.
3303 PP/27 Bugzilla 1047: change the default for system_filter_user to be the Exim
3304 run-time user, instead of root.
3306 PP/28 Add WHITELIST_D_MACROS option to let some macros be overridden by the
3307 Exim run-time user without dropping privileges.
3309 DW/29 Remove use of va_copy() which breaks pre-C99 systems. Duplicate the
3310 result string, instead of calling string_vformat() twice with the same
3313 DW/30 Allow TRUSTED_CONFIG_PREFIX_FILE only for Exim or CONFIGURE_OWNER, not
3314 for other users. Others should always drop root privileges if they use
3315 -C on the command line, even for a whitelisted configure file.
3317 DW/31 Turn TRUSTED_CONFIG_PREFIX_FILE into TRUSTED_CONFIG_FILE. No prefixes.
3319 NM/01 Fixed bug #1002 - Message loss when using multiple deliveries
3325 JJ/01 installed exipick 20100104.1, adding $max_received_linelength,
3326 $data_path, and $header_path variables; fixed documentation bugs and
3329 JJ/02 installed exipick 20100222.0, added --input-dir and --finput to allow
3330 exipick to access non-standard spools, including the "frozen" queue
3333 NM/01 Bugzilla 965: Support mysql stored procedures.
3334 Patch from Alain Williams
3336 NM/02 Bugzilla 961: Spacing fix (syntax error) on Makefile directives for NetBSD
3338 NM/03 Bugzilla 955: Documentation fix for max_rcpts.
3339 Patch from Andreas Metzler
3341 NM/04 Bugzilla 954: Fix for unknown responses from Dovecot authenticator.
3342 Patch from Kirill Miazine
3344 NM/05 Bugzilla 671: Added umask to procmail example.
3346 JJ/03 installed exipick 20100323.0, fixing doc bug
3348 NM/06 Bugzilla 988: CVE-2010-2023 - prevent hardlink attack on sticky mail
3349 directory. Notification and patch from Dan Rosenberg.
3351 TK/01 PDKIM: Upgrade PolarSSL files to upstream version 0.12.1.
3353 TK/02 Improve log output when DKIM signing operation fails.
3355 MH/01 Treat the transport option dkim_domain as a colon separated
3356 list, not as a single string, and sign the message with each element,
3357 omitting multiple occurences of the same signer.
3359 NM/07 Null terminate DKIM strings, Null initialise DKIM variable
3360 Bugzilla 985, 986. Patch by Simon Arlott
3362 NM/08 Bugzilla 967. dnsdb DNS TXT record bug fix (DKIM-related)
3363 Patch by Simon Arlott
3365 PP/01 Bugzilla 989: CVE-2010-2024 - work round race condition on
3366 MBX locking. Notification from Dan Rosenberg.
3372 TK/01 Bugzilla 912: Fix DKIM segfault on empty headers/body.
3374 NM/01 Bugzilla 913: Documentation fix for gnutls_* options.
3376 NM/02 Bugzilla 722: Documentation for randint. Better randomness defaults.
3378 NM/03 Bugzilla 847: Enable DNSDB lookup by default.
3380 NM/04 Bugzilla 915: Flag broken perl installation during build.
3386 TK/01 Added patch by Johannes Berg that expands the main option
3387 "spamd_address" if it starts with a dollar sign.
3389 TK/02 Write list of recipients to X-Envelope-Sender header when building
3390 the mbox-format spool file for content scanning (suggested by Jakob
3393 TK/03 Added patch by Wolfgang Breyha that adds experimental DCC
3394 (http://www.dcc-servers.net/) support via dccifd. Activated by
3395 setting EXPERIMENTAL_DCC=yes in Local/Makefile.
3397 TK/04 Bugzilla 673: Add f-protd malware scanner support. Patch submitted
3398 by Mark Daniel Reidel <mr@df.eu>.
3400 NM/01 Bugzilla 657: Embedded PCRE removed from the exim source tree.
3401 When building exim an external PCRE library is now needed -
3402 PCRE is a system library on the majority of modern systems.
3403 See entry on PCRE_LIBS in EDITME file.
3405 NM/02 Bugzilla 646: Removed unwanted C/R in Dovecot authenticator
3406 conversation. Added nologin parameter to request.
3407 Patch contributed by Kirill Miazine.
3409 TF/01 Do not log submission mode rewrites if they do not change the address.
3411 TF/02 Bugzilla 662: Fix stack corruption before exec() in daemon.c.
3413 NM/03 Bugzilla 602: exicyclog now handles panic log, and creates empty
3414 log files in place. Contributed by Roberto Lima.
3416 NM/04 Bugzilla 667: Close socket used by dovecot authenticator.
3418 TF/03 Bugzilla 615: When checking the local_parts router precondition
3419 after a local_part_suffix or local_part_prefix option, Exim now
3420 does not use the address's named list lookup cache, since this
3421 contains cached lookups for the whole local part.
3423 NM/05 Bugzilla 521: Integrated SPF Best Guess support contributed by
3424 Robert Millan. Documentation is in experimental-spec.txt.
3426 TF/04 Bugzilla 668: Fix parallel build (make -j).
3428 NM/05.2 Bugzilla 437: Prevent Maildir aux files being created with mode 000.
3430 NM/05.3 Bugzilla 598: Improvement to Dovecot authenticator handling.
3431 Patch provided by Jan Srzednicki.
3433 TF/05 Leading white space used to be stripped from $spam_report which
3434 wrecked the formatting. Now it is preserved.
3436 TF/06 Save $spam_score, $spam_bar, and $spam_report in spool files, so
3437 that they are available at delivery time.
3439 TF/07 Fix the way ${extract is skipped in the untaken branch of a conditional.
3441 TF/08 TLS error reporting now respects the incoming_interface and
3442 incoming_port log selectors.
3444 TF/09 Produce a more useful error message if an SMTP transport's hosts
3445 setting expands to an empty string.
3447 NM/06 Bugzilla 744: EXPN did not work under TLS.
3448 Patch provided by Phil Pennock.
3450 NM/07 Bugzilla 769: Extraneous comma in usage fprintf
3451 Patch provided by Richard Godbee.
3453 NM/08 Fixed erroneous documentation references to smtp_notquit_acl to be
3454 acl_smtp_notquit, added index entry.
3456 NM/09 Bugzilla 787: Potential buffer overflow in string_format.
3457 Patch provided by Eugene Bujak.
3459 NM/10 Bugzilla 770: Problem on some platforms modifying the len parameter to
3460 accept(). Patch provided by Maxim Dounin.
3462 NM/11 Bugzilla 749: Preserve old behaviour of blanks comparing equal to zero.
3463 Patch provided by Phil Pennock.
3465 NM/12 Bugzilla 497: Correct behaviour of exiwhat when no config exists.
3467 NM/13 Bugzilla 590: Correct handling of Resent-Date headers.
3468 Patch provided by Brad "anomie" Jorsch.
3470 NM/14 Bugzilla 622: Added timeout setting to transport filter.
3471 Patch provided by Dean Brooks.
3473 TK/05 Add native DKIM support (does not depend on external libraries).
3475 NM/15 Bugzilla 854: Removed code that symlinks to pcre as its no longer useful.
3476 Patch provided by Graeme Fowler.
3478 NM/16 Bugzilla 851: Documentation example syntax fix.
3480 NM/17 Changed NOTICE file to remove references to embedded PCRE.
3482 NM/18 Bugzilla 894: Fix issue with very long lines including comments in
3485 NM/19 Bugzilla 745: TLS version reporting.
3486 Patch provided by Phil Pennock.
3488 NM/20 Bugzilla 167: bool: condition support.
3489 Patch provided by Phil Pennock.
3491 NM/21 Bugzilla 665: gnutls_compat_mode to allow compatibility with broken
3492 clients. Patch provided by Phil Pennock.
3494 NM/22 Bugzilla 607: prepend (not append) Resent-Message-ID and Resent-Date.
3495 Patch provided by Brad "anomie" Jorsch.
3497 NM/23 Bugzilla 687: Fix misparses in eximstats.
3498 Patch provided by Heiko Schlittermann.
3500 NM/24 Bugzilla 688: Fix exiwhat to handle log_selector = +pid.
3501 Patch provided by Heiko Schlittermann.
3503 NM/25 Bugzilla 727: Use transport mode as default mode for maildirsize file.
3504 plus update to original patch.
3506 NM/26 Bugzilla 799: Documentation correction for ratelimit.
3508 NM/27 Bugzilla 802: Improvements to local interface IP addr detection.
3509 Patch provided by David Brownlee.
3511 NM/28 Bugzilla 807: Improvements to LMTP delivery logging.
3513 NM/29 Bugzilla 862, 866, 875: Documentation bugfixes.
3515 NM/30 Bugzilla 888: TLS documentation bugfixes.
3517 NM/31 Bugzilla 896: Dovecot buffer overrun fix.
3519 NM/32 Bugzilla 889: Change all instances of "expr" in shell scripts to "expr --"
3520 Unlike the original bugzilla I have changed all shell scripts in src tree.
3522 NM/33 Bugzilla 898: Transport filter timeout fix.
3523 Patch by Todd Rinaldo.
3525 NM/34 Bugzilla 901: Fix sign/unsigned and UTF mismatches.
3526 Patch by Serge Demonchaux.
3528 NM/35 Bugzilla 39: Base64 decode bug fixes.
3529 Patch by Jakob Hirsch.
3531 NM/36 Bugzilla 909: Correct connect() call in dcc code.
3533 NM/37 Bugzilla 910: Correct issue with relaxed/simple handling.
3535 NM/38 Bugzilla 908: Removed NetBSD3 support as no longer needed.
3537 NM/39 Bugzilla 911: Fixed MakeLinks build script.
3543 TK/01 Add preliminary DKIM support. Currently requires a forked version of
3544 ALT-N's libdkim that I have put here:
3545 http://duncanthrax.net/exim-experimental/
3547 Note to Michael Haardt: I had to rename some vars in sieve.c. They
3548 were called 'true' and it seems that C99 defines that as a reserved
3549 keyword to be used with 'bool' variable types. That means you could
3550 not include C99-style headers which use bools without triggering
3551 build errors in sieve.c.
3553 NM/01 Bugzilla 592: --help option is handled incorrectly if exim is invoked
3554 as mailq or other aliases. Changed the --help handling significantly
3555 to do whats expected. exim_usage() emits usage/help information.
3557 SC/01 Added the -bylocaldomain option to eximstats.
3559 NM/02 Bugzilla 619: Defended against bad data coming back from gethostbyaddr.
3561 NM/03 Bugzilla 613: Documentation fix for acl_not_smtp.
3563 NM/04 Bugzilla 628: PCRE update to 7.4 (work done by John Hall).
3569 PH/01 Another patch from the Sieve maintainer.
3571 PH/02 When an IPv6 address is converted to a string for single-key lookup
3572 in an address list (e.g. for an item such as "net24-dbm;/net/works"),
3573 dots are used instead of colons so that keys in lsearch files need not
3574 contain colons. This was done some time before quoting was made available
3575 in lsearch files. However, iplsearch files do require colons in IPv6 keys
3576 (notated using the quote facility) so as to distinguish them from IPv4
3577 keys. This meant that lookups for IP addresses in host lists did not work
3578 for iplsearch lookups.
3580 This has been fixed by arranging for IPv6 addresses to be expressed with
3581 colons if the lookup type is iplsearch. This is not incompatible, because
3582 previously such lookups could never work.
3584 The situation is now rather anomalous, since one *can* have colons in
3585 ordinary lsearch keys. However, making the change in all cases is
3586 incompatible and would probably break a number of configurations.
3588 TK/01 Change PRVS address formatting scheme to reflect latests BATV draft
3591 MH/01 The "spam" ACL condition code contained a sscanf() call with a %s
3592 conversion specification without a maximum field width, thereby enabling
3593 a rogue spamd server to cause a buffer overflow. While nobody in their
3594 right mind would setup Exim to query an untrusted spamd server, an
3595 attacker that gains access to a server running spamd could potentially
3596 exploit this vulnerability to run arbitrary code as the Exim user.
3598 TK/02 Bugzilla 502: Apply patch to make the SPF-Received: header use
3599 $primary_hostname instead of what libspf2 thinks the hosts name is.
3601 MH/02 The dsearch lookup now uses lstat(2) instead of stat(2) to look for
3602 a directory entry by the name of the lookup key. Previously, if a
3603 symlink pointed to a non-existing file or a file in a directory that
3604 Exim lacked permissions to read, a lookup for a key matching that
3605 symlink would fail. Now it is enough that a matching directory entry
3606 exists, symlink or not. (Bugzilla 503.)
3608 PH/03 The body_linecount and body_zerocount variables are now exported in the
3611 PH/04 Added the $dnslist_matched variable.
3613 PH/05 Unset $tls_cipher and $tls_peerdn before making a connection as a client.
3614 This means they are set thereafter only if the connection becomes
3617 PH/06 Added the client_condition to authenticators so that some can be skipped
3618 by clients under certain conditions.
3620 PH/07 The error message for a badly-placed control=no_multiline_responses left
3621 "_responses" off the end of the name.
3623 PH/08 Added -Mvc to output a copy of a message in RFC 2822 format.
3625 PH/09 Tidied the code for creating ratelimiting keys, creating them explicitly
3626 (without spaces) instead of just copying the configuration text.
3628 PH/10 Added the /noupdate option to the ratelimit ACL condition.
3630 PH/11 Added $max_received_linelength.
3632 PH/12 Added +ignore_defer and +include_defer to host lists.
3634 PH/13 Installed PCRE version 7.2. This needed some changes because of the new
3635 way in which PCRE > 7.0 is built.
3637 PH/14 Implemented queue_only_load_latch.
3639 PH/15 Removed an incorrect (int) cast when reading the value of SIZE in a
3640 MAIL command. The effect was to mangle the value on 64-bit systems.
3642 PH/16 Another patch from the Sieve maintainer.
3644 PH/17 Added the NOTQUIT ACL, based on a patch from Ted Cooper.
3646 PH/18 If a system quota error occurred while trying to create the file for
3647 a maildir delivery, the message "Mailbox is full" was not appended to the
3648 bounce if the delivery eventually timed out. Change 4.67/27 below applied
3649 only to a quota excession during the actual writing of the file.
3651 PH/19 It seems that peer DN values may contain newlines (and other non-printing
3652 characters?) which causes problems in log lines. The DN values are now
3653 passed through string_printing() before being added to log lines.
3655 PH/20 Added the "servers=" facility to MySQL and PostgreSQL lookups. (Oracle
3656 and InterBase are left for another time.)
3658 PH/21 Added message_body_newlines option.
3660 PH/22 Guard against possible overflow in moan_check_errorcopy().
3662 PH/23 POSIX allows open() to be a macro; guard against that.
3664 PH/24 If the recipient of an error message contained an @ in the local part
3665 (suitably quoted, of course), incorrect values were put in $domain and
3666 $local_part during the evaluation of errors_copy.
3672 MH/01 Fix for bug #448, segfault in Dovecot authenticator when interface_address
3673 is unset (happens when testing with -bh and -oMi isn't used). Thanks to
3676 PH/01 Added a new log selector smtp_no_mail, to log SMTP sessions that do not
3677 issue a MAIL command.
3679 PH/02 In an ACL statement such as
3681 deny dnslists = X!=127.0.0.2 : X=127.0.0.2
3683 if a client was not listed at all, or was listed with a value other than
3684 127.0.0.2, in the X list, but was listed with 127.0.0.2 in the Y list,
3685 the condition was not true (as it should be), so access was not denied.
3686 The bug was that the ! inversion was incorrectly passed on to the second
3687 item. This has been fixed.
3689 PH/03 Added additional dnslists conditions == and =& which are different from
3690 = and & when the dns lookup returns more than one IP address.
3692 PH/04 Added gnutls_require_{kx,mac,protocols} to give more control over the
3693 cipher suites used by GnuTLS. These options are ignored by OpenSSL.
3695 PH/05 After discussion on the list, added a compile time option ENABLE_DISABLE_
3696 FSYNC, which compiles an option called disable_fsync that allows for
3697 bypassing fsync(). The documentation is heavily laced with warnings.
3699 SC/01 Updated eximstats to collate all SpamAssassin rejects into one bucket.
3701 PH/06 Some tidies to the infrastructure of the Test Suite that is concerned
3702 with the auxiliary C programs that it uses: (1) Arrange for BIND_8_COMPAT
3703 to be defined when compiling on OSX (Darwin); (2) Tidies to the Makefile,
3704 including adding "make clean"; (3) Added -fPIC when compiling the test
3705 dynamically loaded module, to get rid of a warning.
3707 MH/02 Fix for bug #451, causing paniclog entries to be written if a bounce
3708 message fails, move_frozen_messages = true and ignore_bounce_errors_after
3709 = 0s. The bug is otherwise harmless.
3711 PH/07 There was a bug in the dovecot authenticator such that the value of
3712 $auth1 could be overwritten, and so not correctly preserved, after a
3713 successful authentication. This usually meant that the value preserved by
3714 the server_setid option was incorrect.
3716 PH/08 Added $smtp_count_at_connection_start, deliberately with a long name.
3718 PH/09 Installed PCRE release 7.0.
3720 PH/10 The acl_not_smtp_start ACL was, contrary to the documentation, not being
3721 run for batched SMTP input. It is now run at the start of every message
3722 in the batch. While fixing this I discovered that the process information
3723 (output by running exiwhat) was not always getting set for -bs and -bS
3724 input. This is fixed, and it now also says "batched" for BSMTP.
3726 PH/11 Added control=no_pipelining.
3728 PH/12 Added $sending_ip_address and $sending_port (mostly Magnus Holmgren's
3729 patch, slightly modified), and move the expansion of helo_data till after
3730 the connection is made in the smtp transport (so it can use these
3733 PH/13 Added ${rfc2047d: to decoded RFC 2047 strings.
3735 PH/14 Added log_selector = +pid.
3737 PH/15 Flush SMTP output before delaying, unless control=no_delay_flush is set.
3739 PH/16 Add ${if forany and ${if forall.
3741 PH/17 Added dsn_from option to vary the From: line in DSNs.
3743 PH/18 Flush SMTP output before performing a callout, unless control =
3744 no_callout_flush is set.
3746 PH/19 Change 4.64/PH/36 introduced a bug: when address_retry_include_sender
3747 was true (the default) a successful delivery failed to delete the retry
3748 item, thus causing premature timeout of the address. The bug is now
3751 PH/20 Added hosts_avoid_pipelining to the smtp transport.
3753 PH/21 Long custom messages for fakedefer and fakereject are now split up
3754 into multiline responses in the same way that messages for "deny" and
3755 other ACL rejections are.
3757 PH/22 Applied Jori Hamalainen's speed-up changes and typo fixes to exigrep,
3758 with slight modification.
3760 PH/23 Applied sieve patches from the maintainer "tracking the latest notify
3761 draft, changing the syntax and factoring some duplicate code".
3763 PH/24 When the log selector "outgoing_port" was set, the port was shown as -1
3764 for deliveries of the second and subsequent messages over the same SMTP
3767 PH/25 Applied Magnus Holmgren's patch for ${addresses, ${map, ${filter, and
3768 ${reduce, with only minor "tidies".
3770 SC/02 Applied Daniel Tiefnig's patch to improve the '($parent) =' pattern match.
3772 PH/26 Added a "continue" ACL modifier that does nothing, for the benefit of its
3773 expansion side effects.
3775 PH/27 When a message times out after an over-quota error from an Exim-imposed
3776 quota, the bounce message says "mailbox is full". This message was not
3777 being given when it was a system quota that was exceeded. It now should
3780 MH/03 Made $recipients available in local_scan(). local_scan() already has
3781 better access to the recipient list through recipients_list[], but
3782 $recipients can be useful in postmaster-provided expansion strings.
3784 PH/28 The $smtp_command and $smtp_command_argument variables were not correct
3785 in the case of a MAIL command with additional options following the
3786 address, for example: MAIL FROM:<foo@bar> SIZE=1234. The option settings
3787 were accidentally chopped off.
3789 PH/29 SMTP synchronization checks are implemented when a command is read -
3790 there is a check that no more input is waiting when there shouldn't be
3791 any. However, for some commands, a delay in an ACL can mean that it is
3792 some time before the response is written. In this time, more input might
3793 arrive, invalidly. So now there are extra checks after an ACL has run for
3794 HELO/EHLO and after the predata ACL, and likewise for MAIL and RCPT when
3795 pipelining has not been advertised.
3797 PH/30 MH's patch to allow iscntrl() characters to be list separators.
3799 PH/31 Unlike :fail:, a custom message specified with :defer: was not being
3800 returned in the SMTP response when smtp_return_error_details was false.
3801 This has been fixed.
3803 PH/32 Change the Dovecot authenticator to use read() and write() on the socket
3804 instead of the C I/O that was originally supplied, because problems were
3805 reported on Solaris.
3807 PH/33 Compile failed with OpenSSL 0.9.8e. This was due to a coding error in
3808 Exim which did not show up earlier: it was assuming that a call to
3809 SSL_CTX_set_info_callback() might give an error value. In fact, there is
3810 no error. In previous releases of OpenSSL, SSL_CTX_set_info_callback()
3811 was a macro that became an assignment, so it seemed to work. This has
3812 changed to a proper function call with a void return, hence the compile
3813 error. Exim's code has been fixed.
3815 PH/34 Change HDA_SIZE in oracle.c from 256 to 512. This is needed for 64-bit
3818 PH/35 Applied a patch from the Sieve maintainer which fixes a bug in "notify".
3820 PH/36 Applied John Jetmore's patch to add -v functionality to exigrep.
3822 PH/37 If a message is not accepted after it has had an id assigned (e.g.
3823 because it turns out to be too big or there is a timeout) there is no
3824 "Completed" line in the log. When some messages of this type were
3825 selected by exigrep, they were listed as "not completed". Others were
3826 picked up by some special patterns. I have improved the selection
3827 criteria to be more general.
3829 PH/38 The host_find_failed option in the manualroute router can now be set
3830 to "ignore", to completely ignore a host whose IP address cannot be
3831 found. If all hosts are ignored, the behaviour is controlled by the new
3832 host_all_ignored option.
3834 PH/39 In a list of hosts for manualroute, if one item (either because of multi-
3835 homing or because of multiple MX records with /mx) generated more than
3836 one IP address, and the following item turned out to be the local host,
3837 all the secondary addresses of the first item were incorrectly removed
3838 from the list, along with the local host and any following hosts (which
3839 is what is supposed to happen).
3841 PH/40 When Exim receives a message, it writes the login name, uid, and gid of
3842 whoever called Exim into the -H file. In the case of the daemon it was
3843 behaving confusingly. When first started, it used values for whoever
3844 started the daemon, but after a SIGHUP it used the Exim user (because it
3845 calls itself on a restart). I have changed the code so that it now always
3848 PH/41 (Following a suggestion from Tony Finch) If all the RCPT commands in a
3849 message are rejected with the same error (e.g. no authentication or bad
3850 sender address), and a DATA command is nevertheless sent (as can happen
3851 with PIPELINING or a stupid MUA), the error message that was given to the
3852 RCPT commands is included in the rejection of the DATA command. This is
3853 intended to be helpful for MUAs that show only the final error to their
3856 PH/42 Another patch from the Sieve maintainer.
3858 SC/02 Eximstats - Differentiate between permanent and temporary rejects.
3859 Eximstats - Fixed some broken HTML links and added missing column headers
3861 Eximstats - Fixed Grand Total Summary Domains, Edomains, and Email
3862 columns for Rejects, Temp Rejects, Ham, and Spam rows.
3864 SC/03 Eximstats - V1.58 Fix to get <> and blackhole to show in edomain tables.
3866 PH/43 Yet another patch from the Sieve maintainer.
3868 PH/44 I found a way to check for a TCP/IP connection going away before sending
3869 the response to the final '.' that terminates a message, but only in the
3870 case where the client has not sent further data following the '.'
3871 (unfortunately, this is allowed). However, in many cases there won't be
3872 any further data because there won't be any more messages to send. A call
3873 to select() can be used: if it shows that the input is "ready", there is
3874 either input waiting, or the socket has been closed. An attempt to read
3875 the next input character can distinguish the two cases. Previously, Exim
3876 would have sent an OK response which the client would never have see.
3877 This could lead to message repetition. This fix should cure that, at
3878 least in a lot of common cases.
3880 PH/45 Do not advertise STARTTLS in response to HELP unless it would be
3881 advertised in response to EHLO.
3887 PH/01 Two more bugs that were introduced by 4.64/PH/07, in addition to the one
3888 fixed by 4.65/MH/01 (is this a record?) are fixed:
3890 (i) An empty string was always treated as zero by the numeric comparison
3891 operators. This behaviour has been restored.
3893 (ii) It is documented that the numeric comparison operators always treat
3894 their arguments as decimal numbers. This was broken in that numbers
3895 starting with 0 were being interpreted as octal.
3897 While fixing these problems I realized that there was another issue that
3898 hadn't been noticed. Values of message_size_limit (both the global option
3899 and the transport option) were treated as octal if they started with 0.
3900 The documentation was vague. These values are now always treated as
3901 decimal, and I will make that clear in the documentation.
3907 TK/01 Disable default definition of HAVE_LINUX_SENDFILE. Clashes with
3908 Linux large file support (_FILE_OFFSET_BITS=64) on older glibc
3911 MH/01 Don't check that the operands of numeric comparison operators are
3912 integers when their expansion is in "skipping" mode (fixes bug
3913 introduced by 4.64-PH/07).
3915 PH/01 If a system filter or a router generates more than SHRT_MAX (32767)
3916 child addresses, Exim now panics and dies. Previously, because the count
3917 is held in a short int, deliveries were likely to be lost. As such a
3918 large number of recipients for a single message is ridiculous
3919 (performance will be very, very poor), I have chosen to impose a limit
3920 rather than extend the field.
3926 TK/01 Bugzilla #401. Fix DK spooling code so that it can overwrite a
3927 leftover -K file (the existence of which was triggered by #402).
3928 While we were at it, introduced process PID as part of the -K
3929 filename. This should rule out race conditions when creating
3932 TK/02 Bugzilla #402. Apply patch from Simon Arlott, speeding up DK signing
3933 processing considerably. Previous code took too long for large mails,
3934 triggering a timeout which in turn triggers #401.
3936 TK/03 Introduced HAVE_LINUX_SENDFILE to os.h-Linux. Currently only used
3937 in the DK code in transports.c. sendfile() is not really portable,
3938 hence the _LINUX specificness.
3940 TF/01 In the add_headers option to the mail command in an Exim filter,
3941 there was a bug that Exim would claim a syntax error in any
3942 header after the first one which had an odd number of characters
3945 PH/01 If a server that rejects MAIL FROM:<> was the target of a sender
3946 callout verification, Exim cached a "reject" for the entire domain. This
3947 is correct for most verifications, but it is not correct for a recipient
3948 verification with use_sender or use_postmaster set, because in that case
3949 the callout does not use MAIL FROM:<>. Exim now distinguishes the special
3950 case of MAIL FROM:<> rejection from other early rejections (e.g.
3951 rejection of HELO). When verifying a recipient using a non-null MAIL
3952 address, the cache is ignored if it shows MAIL FROM:<> rejection.
3953 Whatever the result of the callout, the value of the domain cache is
3954 left unchanged (for any other kind of callout, getting as far as trying
3955 RCPT means that the domain itself is ok).
3957 PH/02 Tidied a number of unused variable and signed/unsigned warnings that
3960 PH/03 On Solaris, an unexpectedly close socket (dropped connection) can
3961 manifest itself as EPIPE rather than ECONNECT. When tidying away a
3962 session, the daemon ignores ECONNECT errors and logs others; it now
3963 ignores EPIPE as well.
3965 PH/04 Applied Nico Erfurth's refactoring patch to tidy up mime.c
3966 (quoted-printable decoding).
3968 PH/05 Applied Nico Erfurth's refactoring patch to tidy up spool_mbox.c, and
3969 later the small subsequent patch to fix an introduced bug.
3971 PH/06 Installed the latest Cygwin Makefile from the Cygwin maintainer.
3973 PH/07 There was no check for overflow in expansions such as ${if >{1}{4096M}}.
3975 PH/08 An error is now given if message_size_limit is specified negative.
3977 PH/09 Applied and tidied up Jakob Hirsch's patch for allowing ACL variables
3978 to be given (somewhat) arbitrary names.
3980 JJ/01 exipick 20060919.0, allow for arbitrary acl_ variables introduced
3983 JJ/02 exipick 20060919.0, --show-vars args can now be regular expressions,
3984 miscellaneous code fixes
3986 PH/10 Added the log_reject_target ACL modifier to specify where to log
3989 PH/11 Callouts were setting the name used for EHLO/HELO from $smtp_active_
3990 hostname. This is wrong, because it relates to the incoming message (and
3991 probably the interface on which it is arriving) and not to the outgoing
3992 callout (which could be using a different interface). This has been
3993 changed to use the value of the helo_data option from the smtp transport
3994 instead - this is what is used when a message is actually being sent. If
3995 there is no remote transport (possible with a router that sets up host
3996 addresses), $smtp_active_hostname is used.
3998 PH/12 Installed Andrey Panin's patch to add a dovecot authenticator. Various
3999 tweaks were necessary in order to get it to work (see also 21 below):
4000 (a) The code assumed that strncpy() returns a negative number on buffer
4001 overflow, which isn't the case. Replaced with Exim's string_format()
4003 (b) There were several signed/unsigned issues. I just did the minimum
4004 hacking in of casts. There is scope for a larger refactoring.
4005 (c) The code used strcasecmp() which is not a standard C function.
4006 Replaced with Exim's strcmpic() function.
4007 (d) The code set only $1; it now sets $auth1 as well.
4008 (e) A simple test gave the error "authentication client didn't specify
4009 service in request". It would seem that Dovecot has changed its
4010 interface. Fortunately there's a specification; I followed it and
4011 changed what the client sends and it appears to be working now.
4013 PH/13 Added $message_headers_raw to provide the headers without RFC 2047
4016 PH/14 Corrected misleading output from -bv when -v was also used. Suppose the
4017 address A is aliased to B and C, where B exists and C does not. Without
4018 -v the output is "A verified" because verification stops after a
4019 successful redirection if more than one address is generated. However,
4020 with -v the child addresses are also verified. Exim was outputting "A
4021 failed to verify" and then showing the successful verification for C,
4022 with its parentage. It now outputs "B failed to verify", showing B's
4023 parentage before showing the successful verification of C.
4025 PH/15 Applied Michael Deutschmann's patch to allow DNS black list processing to
4026 look up a TXT record in a specific list after matching in a combined
4029 PH/16 It seems that the options setting for the resolver (RES_DEFNAMES and
4030 RES_DNSRCH) can affect the behaviour of gethostbyname() and friends when
4031 they consult the DNS. I had assumed they would set it the way they
4032 wanted; and indeed my experiments on Linux seem to show that in some
4033 cases they do (I could influence IPv6 lookups but not IPv4 lookups).
4034 To be on the safe side, however, I have now made the interface to
4035 host_find_byname() similar to host_find_bydns(), with an argument
4036 containing the DNS resolver options. The host_find_byname() function now
4037 sets these options at its start, just as host_find_bydns() does. The smtp
4038 transport options dns_qualify_single and dns_search_parents are passed to
4039 host_find_byname() when gethostbyname=TRUE in this transport. Other uses
4040 of host_find_byname() use the default settings of RES_DEFNAMES
4041 (qualify_single) but not RES_DNSRCH (search_parents).
4043 PH/17 Applied (a modified version of) Nico Erfurth's patch to make
4044 spool_read_header() do less string testing, by means of a preliminary
4045 switch on the second character of optional "-foo" lines. (This is
4046 overdue, caused by the large number of possibilities that now exist.
4047 Originally there were few.) While I was there, I also converted the
4048 str(n)cmp tests so they don't re-test the leading "-" and the first
4049 character, in the hope this might squeeze out yet more improvement.
4051 PH/18 Two problems with "group" syntax in header lines when verifying: (1) The
4052 flag allowing group syntax was set by the header_syntax check but not
4053 turned off, possible causing trouble later; (2) The flag was not being
4054 set at all for the header_verify test, causing "group"-style headers to
4055 be rejected. I have now set it in this case, and also caused header_
4056 verify to ignore an empty address taken from a group. While doing this, I
4057 came across some other cases where the code for allowing group syntax
4058 while scanning a header line wasn't quite right (mostly, not resetting
4059 the flag correctly in the right place). These bugs could have caused
4060 trouble for malformed header lines. I hope it is now all correct.
4062 PH/19 The functions {pwcheck,saslauthd}_verify_password() are always called
4063 with the "reply" argument non-NULL. The code, however (which originally
4064 came from elsewhere) had *some* tests for NULL when it wrote to *reply,
4065 but it didn't always do it. This confused somebody who was copying the
4066 code for some other use. I have removed all the tests.
4068 PH/20 It was discovered that the GnuTLS code had support for RSA_EXPORT, a
4069 feature that was used to support insecure browsers during the U.S. crypto
4070 embargo. It requires special client support, and Exim is probably the
4071 only MTA that supported it -- and would never use it because real RSA is
4072 always available. This code has been removed, because it had the bad
4073 effect of slowing Exim down by computing (never used) parameters for the
4074 RSA_EXPORT functionality.
4076 PH/21 On the advice of Timo Sirainen, added a check to the dovecot
4077 authenticator to fail if there's a tab character in the incoming data
4078 (there should never be unless someone is messing about, as it's supposed
4079 to be base64-encoded). Also added, on Timo's advice, the "secured" option
4080 if the connection is using TLS or if the remote IP is the same as the
4081 local IP, and the "valid-client-cert option" if a client certificate has
4084 PH/22 As suggested by Dennis Davis, added a server_condition option to *all*
4085 authenticators. This can be used for authorization after authentication
4086 succeeds. (In the case of plaintext, it servers for both authentication
4089 PH/23 Testing for tls_required and lost_connection in a retry rule didn't work
4090 if any retry times were supplied.
4092 PH/24 Exim crashed if verify=helo was activated during an incoming -bs
4093 connection, where there is no client IP address to check. In this
4094 situation, the verify now always succeeds.
4096 PH/25 Applied John Jetmore's -Mset patch.
4098 PH/26 Added -bem to be like -Mset, but loading a message from a file.
4100 PH/27 In a string expansion for a processed (not raw) header when multiple
4101 headers of the same name were present, leading whitespace was being
4102 removed from all of them, but trailing whitespace was being removed only
4103 from the last one. Now trailing whitespace is removed from each header
4104 before concatenation. Completely empty headers in a concatenation (as
4105 before) are ignored.
4107 PH/28 Fixed bug in backwards-compatibility feature of PH/09 (thanks to John
4108 Jetmore). It would have mis-read ACL variables from pre-4.61 spool files.
4110 PH/29 [Removed. This was a change that I later backed out, and forgot to
4111 correct the ChangeLog entry (that I had efficiently created) before
4112 committing the later change.]
4114 PH/30 Exim was sometimes attempting to deliver messages that had suffered
4115 address errors (4xx response to RCPT) over the same connection as other
4116 messages routed to the same hosts. Such deliveries are always "forced",
4117 so retry times are not inspected. This resulted in far too many retries
4118 for the affected addresses. The effect occurred only when there were more
4119 hosts than the hosts_max_try setting in the smtp transport when it had
4120 the 4xx errors. Those hosts that it had tried were not added to the list
4121 of hosts for which the message was waiting, so if all were tried, there
4122 was no problem. Two fixes have been applied:
4124 (i) If there are any address or message errors in an SMTP delivery, none
4125 of the hosts (tried or untried) are now added to the list of hosts
4126 for which the message is waiting, so the message should not be a
4127 candidate for sending over the same connection that was used for a
4128 successful delivery of some other message. This seems entirely
4129 reasonable: after all the message is NOT "waiting for some host".
4130 This is so "obvious" that I'm not sure why it wasn't done
4131 previously. Hope I haven't missed anything, but it can't do any
4132 harm, as the worst effect is to miss an optimization.
4134 (ii) If, despite (i), such a delivery is accidentally attempted, the
4135 routing retry time is respected, so at least it doesn't keep
4136 hammering the server.
4138 PH/31 Installed Andrew Findlay's patch to close the writing end of the socket
4139 in ${readsocket because some servers need this prod.
4141 PH/32 Added some extra debug output when updating a wait-xxx database.
4143 PH/33 The hint "could be header name not terminated by colon", which has been
4144 given for certain expansion errors for a long time, was not being given
4145 for the ${if def:h_colon_omitted{... case.
4147 PH/34 The spec says: "With one important exception, whenever a domain list is
4148 being scanned, $domain contains the subject domain." There was at least
4149 one case where this was not true.
4151 PH/35 The error "getsockname() failed: connection reset by peer" was being
4152 written to the panic log as well as the main log, but it isn't really
4153 panic-worthy as it just means the connection died rather early on. I have
4154 removed the panic log writing for the ECONNRESET error when getsockname()
4157 PH/36 After a 4xx response to a RCPT error, that address was delayed (in queue
4158 runs only) independently of the message's sender address. This meant
4159 that, if the 4xx error was in fact related to the sender, a different
4160 message to the same recipient with a different sender could confuse
4161 things. In particular, this can happen when sending to a greylisting
4162 server, but other circumstances could also provoke similar problems.
4163 I have changed the default so that the retry time for these errors is now
4164 based a combination of the sender and recipient addresses. This change
4165 can be overridden by setting address_retry_include_sender=false in the
4168 PH/37 For LMTP over TCP/IP (the smtp transport), error responses from the
4169 remote server are returned as part of bounce messages. This was not
4170 happening for LMTP over a pipe (the lmtp transport), but now it is the
4171 same for both kinds of LMTP.
4173 PH/38 Despite being documented as not happening, Exim was rewriting addresses
4174 in header lines that were in fact CNAMEs. This is no longer the case.
4176 PH/39 If -R or -S was given with -q<time>, the effect of -R or -S was ignored,
4177 and queue runs started by the daemon processed all messages. This has
4178 been fixed so that -R and -S can now usefully be given with -q<time>.
4180 PH/40 Import PCRE release 6.7 (fixes some bugs).
4182 PH/41 Add bitwise logical operations to eval (courtesy Brad Jorsch).
4184 PH/42 Give an error if -q is specified more than once.
4186 PH/43 Renamed the variables $interface_address and $interface_port as
4187 $received_ip_address and $received_port, to make it clear that these
4188 values apply to message reception, and not to the outgoing interface when
4189 a message is delivered. (The old names remain recognized, of course.)
4191 PH/44 There was no timeout on the connect() call when using a Unix domain
4192 socket in the ${readsocket expansion. There now is.
4194 PH/45 Applied a modified version of Brad Jorsch's patch to allow "message" to
4195 be meaningful with "accept".
4197 SC/01 Eximstats V1.43
4198 Bug fix for V1.42 with -h0 specified. Spotted by Chris Lear.
4200 SC/02 Eximstats V1.44
4201 Use a glob alias rather than an array ref in the generated
4202 parser. This improves both readability and performance.
4204 SC/03 Eximstats V1.45 (Marco Gaiarin / Steve Campbell)
4205 Collect SpamAssassin and rejection statistics.
4206 Don't display local sender or destination tables unless
4207 there is data to show.
4208 Added average volumes into the top table text output.
4210 SC/04 Eximstats V1.46
4211 Collect data on the number of addresses (recipients)
4212 as well as the number of messages.
4214 SC/05 Eximstats V1.47
4215 Added 'Message too big' to the list of mail rejection
4216 reasons (thanks to Marco Gaiarin).
4218 SC/06 Eximstats V1.48
4219 Mainlog lines which have GMT offsets and are too short to
4220 have a flag are now skipped.
4222 SC/07 Eximstats V1.49 (Alain Williams)
4223 Added the -emptyok flag.
4225 SC/08 Eximstats V1.50
4226 Fixes for obtaining the IP address from reject messages.
4228 JJ/03 exipick.20061117.2, made header handling as similar to exim as possible
4229 (added [br]h_ prefixes, implemented RFC2047 decoding. Fixed
4230 whitespace changes from 4.64-PH/27
4232 JJ/04 exipick.20061117.2, fixed format and added $message_headers_raw to
4235 JJ/05 exipick.20061117.2, bug fixes (error out sooner when invalid criteria
4236 are found, allow negative numbers in numeric criteria)
4238 JJ/06 exipick.20061117.2, added new $message_body_missing variable
4240 JJ/07 exipick.20061117.2, added $received_ip_address and $received_port
4241 to match changes made in 4.64-PH/43
4243 PH/46 Applied Jori Hamalainen's patch to add features to exiqsumm.
4245 PH/47 Put in an explicit test for a DNS lookup of an address record where the
4246 "domain" is actually an IP address, and force a failure. This locks out
4247 those revolvers/nameservers that support "A-for-A" lookups, in
4248 contravention of the specifications.
4250 PH/48 When a host name was looked up from an IP address, and the subsequent
4251 forward lookup of the name timed out, the host name was left in
4252 $sender_host_name, contrary to the specification.
4254 PH/49 Although default lookup types such as lsearch* or cdb*@ have always been
4255 restricted to single-key lookups, Exim was not diagnosing an error if
4256 * or *@ was used with a query-style lookup.
4258 PH/50 Increased the value of DH_BITS in tls-gnu.c from 768 to 1024.
4260 MH/01 local_scan ABI version incremented to 1.1. It should have been updated
4261 long ago, but noone interested enough thought of it. Let's just say that
4262 the "1.1" means that there are some new functions that weren't there at
4263 some point in the past.
4265 PH/51 Error processing for expansion failure of helo_data from an smtp
4266 transport during callout processing was broken.
4268 PH/52 Applied John Jetmore's patch to allow tls-on-connect and STARTTLS to be
4269 tested/used via the -bh/-bhc/-bs options.
4271 PH/53 Added missing "#include <time.h>" to pcre/pcretest.c (this was a PCRE
4272 bug, fixed in subsequent PCRE releases).
4274 PH/54 Applied Robert Bannocks' patch to avoid a problem with references that
4275 arises when using the Solaris LDAP libraries (but not with OpenLDAP).
4277 PH/55 Check for a ridiculously long file name in exim_dbmbuild.
4283 SC/01 Use a glob alias rather than an array ref in eximstats generated
4284 parser. This improves both readability and performance.
4286 SC/02 Collect SpamAssassin and rejection statistics in eximstats.
4287 Don't display local sender or destination tables in eximstats unless
4288 there is data to show.
4289 Added average volumes into the eximstats top table text output.
4291 SC/03 Collect data on the number of addresses (recipients) as well
4292 as the number of messages in eximstats.
4294 TF/01 Correct an error in the documentation for the redirect router. Exim
4295 does (usually) call initgroups() when daemonizing.
4297 TF/02 Call initgroups() when dropping privilege in exim.c, so that Exim runs
4298 with consistent privilege compared to when running as a daemon.
4300 TF/03 Note in the spec that $authenticated_id is not set for local
4301 submissions from trusted users.
4303 TF/04 The ratelimit per_rcpt option now works correctly in acl_not_smtp.
4304 Thanks to Dean Brooks <dean@iglou.com> for the patch.
4306 TF/05 Make it easier to get SMTP authentication and TLS/SSL support working
4307 by adding some example configuration directives to the default
4308 configuration file. A little bit of work is required to uncomment the
4309 directives and define how usernames and passwords are checked, but
4310 there is now a framework to start from.
4312 PH/01 Added #define LDAP_DEPRECATED 1 to ldap.c because some of the "old"
4313 functions that Exim currently uses aren't defined in ldap.h for OpenLDAP
4314 without this. I don't know how relevant this is to other LDAP libraries.
4316 PH/02 Add the verb name to the "unknown ACL verb" error.
4318 PH/03 Magnus Holmgren's patch for filter_prepend_home.
4320 PH/03 Fixed Bugzilla #101: macro definition between ACLs doesn't work.
4322 PH/04 Applied Magnus Holmgren's patch to fix Bugzilla #98: transport's home
4323 directory not expanded when it should be if an expanded home directory
4324 was set for the address (which is overridden by the transport).
4326 PH/05 Applied Alex Kiernan's patch to fix Bugzilla #99: a problem with
4329 PH/06 Added acl_not_smtp_start, based on Johannes Berg's patch, and set the
4330 bit to forbid control=suppress_local_fixups in the acl_not_smtp ACL,
4331 because it is too late at that time, and has no effect.
4333 PH/07 Changed ${quote_pgsql to quote ' as '' instead of \' because of a
4334 security issue with \' (bugzilla #107). I could not use the
4335 PQescapeStringConn() function, because it needs a PGconn value as one of
4338 PH/08 When testing addresses using -bt, indicate those final addresses that
4339 are duplicates that would not cause an additional delivery. At least one
4340 person was confused, thinking that -bt output corresponded to deliveries.
4341 (Suppressing duplicates isn't a good idea as you lose the information
4342 about possibly different redirections that led to the duplicates.)
4344 PH/09 Applied patch from Erik to use select() instead of poll() in spam.c on
4345 systems where poll() doesn't work, in particular OS X.
4347 PH/10 Added more information to debugging output for retry time not reached.
4349 PH/11 Applied patch from Arkadiusz Miskiewicz to apply a timeout to read
4350 operations in malware.c.
4352 PH/12 Applied patch from Magnus Holmgren to include the "h" tag in Domain Keys
4355 PH/13 If write_rejectlog was set false when logging was sent to syslog with
4356 syslog_duplication set false, log lines that would normally be written
4357 both the the main log and to the reject log were not written to syslog at
4360 PH/14 In the default configuration, change the use of "message" in ACL warn
4361 statements to "add_header".
4363 PH/15 Diagnose a filter syntax error for "seen", "unseen", or "noerror" if not
4364 not followed by a command (e.g. "seen endif").
4366 PH/16 Recognize SMTP codes at the start of "message" in ACLs and after :fail:
4367 and :defer: in a redirect router. Add forbid_smtp_code to suppress the
4370 PH/17 Added extra conditions to the default value of delay_warning_condition
4374 { !eq{$h_list-id:$h_list-post:$h_list-subscribe:}{} } \
4375 { match{$h_precedence:}{(?i)bulk|list|junk} } \
4376 { match{$h_auto-submitted:}{(?i)auto-generated|auto-replied} } \
4379 The Auto-Submitted: and various List- headers are standardised, whereas I
4380 don't think Precedence: ever was.
4382 PH/18 Refactored debugging code in route_finduser() to show more information,
4383 in particular, the error code if getpwnam() issues one.
4385 PH/19 Added PQsetClientEncoding(conn, "SQL_ASCII") to the pgsql code module.
4386 This is apparently needed in addition to the PH/07 change above to avoid
4387 any possible encoding problems.
4389 PH/20 Perl can change the locale. Exim was resetting it after a ${perl call,
4390 but not after initializing Perl.
4392 PH/21 Added a call to PQsetNoticeProcessor() to catch pgsql "notices" and
4393 output them only if debugging. By default they are written stderr,
4394 apparently, which is not desirable.
4396 PH/22 Added Alain Williams' LDAP patch to support setting REFERRALS=off on
4399 JJ/01 exipick: added --reverse (and -R synonym), --random, --size, --sort and
4402 JJ/02 exipick: rewrote --help documentation to hopefully make more clear.
4404 PH/23 Made -oMaa and -oMt work with -bh and -bs to pretend the connection is
4405 authenticated or an ident call has been made. Suppress the default
4406 values for $authenticated_id and $authenticated_sender (but permit -oMai
4407 and -oMas) when testing with -bh.
4409 PH/24 Re-jigged the order of the tests in the default configuration so that the
4410 tests for valid domains and recipients precede the DNS black list and CSA
4411 tests, on the grounds that those ones are more expensive.
4413 PH/25 Exim was not testing for a space following SMTP commands such as EHLO
4414 that require one. Thus, EHLORHUBARB was interpreted as a valid command.
4415 This bug exists in every version of Exim that I still have, right back to
4418 PH/26 (n)wildlsearch lookups are documented as being done case-insensitively.
4419 However, an attempt to turn on case-sensitivity in a regex key by
4420 including (?-i) didn't work because the subject string was already
4421 lowercased, and the effects were non-intuitive. It turns out that a
4422 one-line patch can be used to allow (?-i) to work as expected.
4428 TF/01 Fix the add_header change below (4.61 PH/55) which had a bug that (amongst
4429 other effects) broke the use of negated acl sub-conditions.
4431 PH/01 ${readsocket now supports Internet domain sockets (modified John Jetmore
4434 PH/02 When tcp-wrappers is called from Exim, it returns only "deny" or "allow".
4435 "Deny" causes Exim to reject the incoming connection with a 554 error.
4436 Unfortunately, if there is a major crisis, such as a disk failure,
4437 tcp-wrappers gives "deny", whereas what one would like would be some
4438 kind of temporary error. A kludge has been added to help with this.
4439 Before calling hosts_ctl(), errno is set zero. If the result is "deny", a
4440 554 error is used if errno is still zero or contains ENOENT (which occurs
4441 if either of the /etc/hosts.{allow,deny} files is missing). Otherwise, a
4444 PH/03 Add -lutil to the default FreeBSD LIBS setting.
4446 PH/04 Change PH/19 for 4.61 was too wide. It should not be applied to host
4447 errors. Otherwise a message that provokes a temporary error (when other
4448 messages do not) can cause a whole host to time out.
4450 PH/05 Batch deliveries by appendfile and pipe transports did not work when the
4451 addresses were routed directly to files or pipes from a redirect router.
4452 File deliveries just didn't batch; pipe deliveries might have suffered
4455 PH/06 A failure to get a lock for a hints database would erroneously always say
4456 "Failed to get write lock", even when it was really a read lock.
4458 PH/07 The appendfile transport was creating MBX lock files with a fixed mode
4459 of 0600. This has been changed to use the value of the lockfile_mode
4460 option (which defaults to 0600).
4462 PH/08 Applied small patch from the Sieve maintainer.
4464 PH/09 If maildir_quota_directory_regex was set to exclude (say) the .Trash
4465 folder from quota calculations, a direct delivery into this folder messed
4466 up the contents of the maildirsize file. This was because the regex was
4467 used only to exclude .Trash (or whatever) when the size of the mailbox
4468 was calculated. There was no check that a delivery was happening into an
4469 excluded directory. This bug has been fixed by ignoring all quota
4470 processing for deliveries into excluded directories.
4472 PH/10 Added the maildirfolder_create_regex option to appendfile.
4478 PH/01 The code for finding all the local interface addresses on a FreeBSD
4479 system running IPv6 was broken. This may well have applied to all BSD
4480 systems, as well as to others that have similar system calls. The broken
4481 code found IPv4 interfaces correctly, but gave incorrect values for the
4482 IPv6 interfaces. In particular, ::1 was not found. The effect in Exim was
4483 that it would not match correctly against @[] and not recognize the IPv6
4486 PH/02 The ipliteral router was not recognizing addresses of the form user@
4487 [ipv6:....] because it didn't know about the "ipv6:" prefix.
4489 PH/03 Added disable_ipv6.
4491 PH/04 Changed $reply_address to use the raw form of the headers instead of the
4492 decoded form, because it is most often used to construct To: headers
4493 lines in autoreplies, and the decoded form may well be syntactically
4494 invalid. However, $reply_address has leading white space removed, and all
4495 newlines turned into spaces so that the autoreply transport does not
4498 PH/05 If group was specified without a user on a router, and no group or user
4499 was specified on a transport, the group from the router was ignored.
4501 PH/06 Increased the number of ACL variables to 20 of each type, and arranged
4502 for visible compile-time settings that can be used to change these
4503 numbers, for those that want even more. Backwards compatibility with old
4504 spool files has been maintained. However, going back to a previous Exim
4505 release will lost any variables that are in spool files.
4507 PH/07 Two small changes when running in the test harness: increase delay when
4508 passing a TCP/IP connection to a new process, in case the original
4509 process has to generate a bounce, and remove special handling of
4510 127.0.0.2 (sic), which is no longer necessary.
4512 PH/08 Changed debug output of dbfn_open() flags from numbers to names, so as to
4513 be the same on different OS.
4515 PH/09 Moved a debug statement in filter processing to avoid a race problem when
4518 JJ/01 exipick: fixed bug where -b (brief) output option showed "Vars:"
4519 whether --show-vars was specified or not
4521 JJ/02 exipick: Added support for new ACL variable spool format introduced
4524 PH/10 Fixed another bug related to PH/04 above: if an incoming message had a
4525 syntactically invalid From: or Reply-to: line, and a filter used this to
4526 generate an autoreply, and therefore failed to obtain an address for the
4527 autoreply, Exim could try to deliver to a non-existent relative file
4528 name, causing unrelated and misleading errors. What now happens is that
4529 it logs this as a hard delivery error, but does not attempt to create a
4532 PH/11 The exinext utility has a -C option for testing purposes, but although
4533 the given file was scanned by exinext itself; it wasn't being passed on
4534 when Exim was called.
4536 PH/12 In the smtp transport, treat an explicit ECONNRESET error the same as
4537 an end-of-file indication when reading a command response.
4539 PH/13 Domain literals for IPv6 were not recognized unless IPv6 support was
4540 compiled. In many other places in Exim, IPv6 addresses are always
4541 recognized, so I have changed this. It also means that IPv4 domain
4542 literals of the form [IPV4:n.n.n.n] are now always recognized.
4544 PH/14 When a uid/gid is specified for the queryprogram router, it cannot be
4545 used if the router is not running as root, for example, when verifying at
4546 ACL time, or when using -bh. The debugging output from this situation was
4547 non-existent - all you got was a failure to exec. I have made two
4550 (a) Failures to set uid/gid, the current directory, or a process leader
4551 in a subprocess such as that created by queryprogram now generate
4552 suitable debugging output when -d is set.
4554 (b) The queryprogram router detects when it is not running as root,
4555 outputs suitable debugging information if -d is set, and then runs
4556 the subprocess without attempting to change uid/gid.
4558 PH/15 Minor change to Makefile for building test_host (undocumented testing
4561 PH/16 As discussed on the list in Nov/Dec: Exim no longer looks at the
4562 additional section of a DNS packet that returns MX or SRV records.
4563 Instead, it always explicitly searches for A/AAAA records. This avoids
4564 major problems that occur when a DNS server includes only records of one
4565 type (A or AAAA) in an MX/SRV packet. A byproduct of this change has
4566 fixed another bug: if SRV records were looked up and the corresponding
4567 address records were *not* found in the additional section, the port
4568 values from the SRV records were lost.
4570 PH/17 If a delivery to a pipe, file, or autoreply was deferred, Exim was not
4571 using the correct key (the original address) when searching the retry
4572 rules in order to find which one to use for generating the retry hint.
4574 PH/18 If quota_warn_message contains a From: header, Exim now refrains from
4575 adding the default one. Similarly, if it contains a Reply-To: header, the
4576 errors_reply_to option, if set, is not used.
4578 PH/19 When calculating a retry time, Exim used to measure the "time since
4579 failure" by looking at the "first failed" field in the retry record. Now
4580 it does not use this if it is later than than the arrival time of the
4581 message. Instead it uses the arrival time. This makes for better
4582 behaviour in cases where some deliveries succeed, thus re-setting the
4583 "first failed" field. An example is a quota failure for a huge message
4584 when small messages continue to be delivered. Without this change, the
4585 "time since failure" will always be short, possible causing more frequent
4586 delivery attempts for the huge message than are intended.
4587 [Note: This change was subsequently modified - see PH/04 for 4.62.]
4589 PH/20 Added $auth1, $auth2, $auth3 to contain authentication data (as well as
4590 $1, $2, $3) because the numerical variables can be reset during some
4591 expansion items (e.g. "match"), thereby losing the authentication data.
4593 PH/21 Make -bV show the size of off_t variables so that the test suite can
4594 decide whether to run tests for quotas > 2G.
4596 PH/22 Test the values given for quota, quota_filecount, quota_warn_threshold,
4597 mailbox_size, and mailbox_filecount in the appendfile transport. If a
4598 filecount value is greater than 2G or if a quota value is greater than 2G
4599 on a system where the size of off_t is not greater than 4, a panic error
4602 PH/23 When a malformed item such as 1.2.3/24 appears in a host list, it can
4603 never match. The debug and -bh output now contains an explicit error
4604 message indicating a malformed IPv4 address or mask.
4606 PH/24 An host item such as 1.2.3.4/abc was being treated as the IP address
4607 1.2.3.4 without a mask. Now it is not recognized as an IP address, and
4608 PH/23 above applies.
4610 PH/25 Do not write to syslog when running in the test harness. The only
4611 occasion when this arises is a failure to open the main or panic logs
4612 (for which there is an explicit test).
4614 PH/26 Added the /no_tell option to "control=freeze".
4616 PH/27 If a host name lookup failed very early in a connection, for example, if
4617 the IP address matched host_lookup and the reverse lookup yielded a name
4618 that did not have a forward lookup, an error message of the form "no IP
4619 address found for host xxx.xxx.xxx (during SMTP connection from NULL)"
4620 could be logged. Now it outputs the IP address instead of "NULL".
4622 PH/28 An enabling patch from MH: add new function child_open_exim2() which
4623 allows the sender and the authenticated sender to be set when
4624 submitting a message from within Exim. Since child_open_exim() is
4625 documented for local_scan(), the new function should be too.
4627 PH/29 In GnuTLS, a forced expansion failure for tls_privatekey was not being
4628 ignored. In both GnuTLS and OpenSSL, an expansion of tls_privatekey that
4629 results in an empty string is now treated as unset.
4631 PH/30 Fix eximon buffer overflow bug (Bugzilla #73).
4633 PH/31 Added sender_verify_fail logging option.
4635 PH/32 In November 2003, the code in Exim that added an empty Bcc: header when
4636 needed by RFC 822 but not by RFC 2822 was commented out. I have now
4637 tidied the source and removed it altogether.
4639 PH/33 When a queue run was abandoned because the load average was too high, a
4640 log line was always written; now it is written only if the queue_run log
4641 selector is set. In addition, the log line for abandonment now contains
4642 information about the queue run such as the pid. This is always present
4643 in "start" and "stop" lines but was omitted from the "abandon" line.
4645 PH/34 Omit spaces between a header name and the colon in the error message that
4646 is given when verify = headers_syntax fails (if there are lots of them,
4647 the message gets confusing).
4649 PH/35 Change the default for dns_check_names_pattern to allow slashes within
4650 names, as there are now some PTR records that contain slashes. This check
4651 is only to protect against broken name servers that fall over on strange
4652 characters, so the fact that it applies to all lookups doesn't matter.
4654 PH/36 Now that the new test suite is complete, we can remove some of the
4655 special code in Exim that was needed for the old test suite. For example,
4656 sorting DNS records because real resolvers return them in an arbitrary
4657 order. The new test suite's fake resolver always returns records in the
4660 PH/37 When running in the test harness, use -odi for submitted messages (e.g.
4661 bounces) except when queue_only is set, to avoid logging races between
4662 the different processes.
4664 PH/38 Panic-die if .include specifies a non-absolute path.
4666 PH/39 A tweak to the "H" retry rule from its user.
4668 JJ/03 exipick: Removed parentheses from 'next' and 'last' calls that specified
4669 a label. They prevented compilation on older perls.
4671 JJ/04 exipick: Refactored code to prevent implicit split to @_ which caused
4672 a warning to be raised on newish perls.
4674 JJ/05 exipick: Fixed bug where -bpc always showed a count of all messages
4675 on queue. Changes to match documented behaviour of showing count of
4676 messages matching specified criteria.
4678 PH/40 Changed the default ident timeout from 30s to 5s.
4680 PH/41 Added support for the use of login_cap features, on those BSD systems
4681 that have them, for controlling the resources used by pipe deliveries.
4683 PH/42 The content-scanning code uses fopen() to create files in which to put
4684 message data. Previously it was not paying any attention to the mode of
4685 the files. Exim runs with umask(0) because the rest of the code creates
4686 files with open(), and sets the required mode explicitly. Thus, these
4687 files were ending up world-writeable. This was not a big issue, because,
4688 being within the spool directory, they were not world-accessible. I have
4689 created a function called modefopen, which takes an additional mode
4690 argument. It sets umask(777), creates the file, chmods it to the required
4691 mode, then resets the umask. All the relevant calls to fopen() in the
4692 content scanning code have been changed to use this function.
4694 PH/43 If retry_interval_max is set greater than 24 hours, it is quietly reset
4695 to 24 hours. This avoids potential overflow problems when processing G
4696 and H retry rules. I suspect nobody ever tinkers with this value.
4698 PH/44 Added STRIP_COMMAND=/usr/bin/strip to the FreeBSD Makefile.
4700 PH/45 When the plaintext authenticator is running as a client, the server's
4701 challenges are checked to ensure they are valid base64 strings. By
4702 default, the authentication attempt is cancelled if an invalid string is
4703 received. Setting client_ignore_invalid_base64 true ignores these errors.
4704 The decoded challenge strings are now placed in $auth1, $auth2, etc. as
4705 they are received. Thus, the responses can be made to depend on the
4706 challenges. If an invalid string is ignored, an empty string is placed in
4709 PH/46 Messages that are created by the autoreply transport now contains a
4710 References: header, in accordance with RFCs 2822 and 3834.
4712 PH/47 Added authenticated_sender_force to the smtp transport.
4714 PH/48 The ${prvs expansion was broken on systems where time_t was long long.
4716 PH/49 Installed latest patch from the Sieve maintainer.
4718 PH/50 When an Exim quota was set without a file count quota, and mailbox_size
4719 was also set, the appendfile transport was unnecessarily scanning a
4720 directory of message files (e.g. for maildir delivery) to find the count
4721 of files (along with the size), even though it did not need this
4722 information. It now does the scan only if it needs to find either the
4723 size of the count of files.
4725 PH/51 Added ${time_eval: to convert Exim time strings into seconds.
4727 PH/52 Two bugs concerned with error handling when the smtp transport is
4730 (i) Exim was not creating retry information for temporary errors given
4731 for individual recipients after the DATA command when the smtp transport
4732 was used in LMTP mode. This meant that they could be retried too
4733 frequently, and not timed out correctly.
4735 (ii) Exim was setting the flag that allows error details to be returned
4736 for LMTP errors on RCPT commands, but not for LMTP errors for individual
4737 recipients that were returned after the DATA command.
4739 PH/53 This is related to PH/52, but is more general: for any failing address,
4740 when detailed error information was permitted to be returned to the
4741 sender, but the error was temporary, then after the final timeout, only
4742 "retry timeout exceeded" was returned. Now it returns the full error as
4743 well as "retry timeout exceeded".
4745 PH/54 Added control=allow_auth_unadvertised, as it seems there are clients that
4746 do this, and (what is worse) MTAs that accept it.
4748 PH/55 Added the add_header modified to ACLs. The use of "message" with "warn"
4749 will now be deprecated.
4751 PH/56 New os.c-cygwin from the Cygwin maintainer.
4753 JJ/06 exipick: added --unsorted option to allow unsorted output in all output
4754 formats (previously only available in exim formats via -bpr, -bpru,
4755 and -bpra. Now also available in native and exiqgrep formats)
4757 JJ/07 exipick: added --freeze and --thaw options to allow faster interaction
4758 with very large, slow to parse queues
4760 JJ/08 exipick: added ! as generic prefix to negate any criteria format
4762 JJ/09 exipick: miscellaneous performance enhancements (~24% improvements)
4764 PH/57 Tidies in SMTP dialogue display in debug output: (i) It was not showing
4765 responses to authentication challenges, though it was showing the
4766 challenges; (ii) I've removed the CR characters from the debug output for
4769 PH/58 Allow for the insertion of a newline as well as a space when a string
4770 is turned into more than one encoded-word during RFC 2047 encoding. The
4771 Sieve code now uses this.
4773 PH/59 Added the following errors that can be detected in retry rules: mail_4xx,
4774 data_4xx, lost_connection, tls_required.
4776 PH/60 When a VRFY deferred or FAILED, the log message rather than the user
4777 message was being sent as an SMTP response.
4779 PH/61 Add -l and -k options to exicyclog.
4781 PH/62 When verifying, if an address was redirected to one new address, so that
4782 verification continued, and the new address failed or deferred after
4783 having set something in $address_data, the value of $address_data was not
4784 passed back to the ACL. This was different to the case when no
4785 redirection occurred. The value is now passed back in both cases.
4787 PH/63 Changed the macro HAVE_LOGIN_CAP (see PH/41 for this release above) to
4788 HAVE_SETCLASSRESOURCES because there are different APIs in use that all
4789 use login_cap.h, so on its own it isn't the distinguishing feature. The
4790 new name refers directly to the setclassresources() function.
4792 PH/65 Added configuration files for NetBSD3.
4794 PH/66 Updated OS/Makefile-HP-UX for gcc 4.1.0 with HP-UX 11.
4796 PH/67 Fixed minor infelicity in the sorting of addresses to ensure that IPv6
4797 is preferred over IPv4.
4799 PH/68 The bounce_return_message and bounce_return_body options were not being
4800 honoured for bounces generated during the reception of non-SMTP messages.
4801 In particular, this applied to messages rejected by the ACL. This bug has
4802 been fixed. However, if bounce_return_message is true and bounce_return_
4803 body is false, the headers that are returned for a non-SMTP message
4804 include only those that have been read before the error was detected.
4805 (In the case of an ACL rejection, they have all been read.)
4807 PH/69 The HTML version of the specification is now built in a directory called
4808 spec_html instead of spec.html, because the latter looks like a path with
4809 a MIME-type, and this confuses some software.
4811 PH/70 Catch two compiler warnings in sieve.c.
4813 PH/71 Fixed an obscure and subtle bug (thanks Alexander & Matthias). The
4814 function verify_get_ident() calls ip_connect() to connect a socket, but
4815 if the "connect()" function timed out, ip_connect() used to close the
4816 socket. However, verify_get_ident() also closes the socket later, and in
4817 between Exim writes to the log, which may get opened at this point. When
4818 the socket was closed in ip_connect(), the log could get the same file
4819 descriptor number as the socket. This naturally causes chaos. The fix is
4820 not to close the socket in ip_connect(); the socket should be closed by
4821 the function that creates it. There was only one place in the code where
4822 this was missing, in the iplookup router, which I don't think anybody now
4823 uses, but I've fixed it anyway.
4825 PH/72 Make dns_again_means_nonexist apply to lookups using gethostbyname() as
4826 well as to direct DNS lookups. Otherwise the handling of names in host
4827 lists is inconsistent and therefore confusing.
4833 PH/01 Two changes to the default runtime configuration:
4835 (1) Move the checks for relay_from_hosts and authenticated clients from
4836 after to before the (commented out) DNS black list checks.
4838 (2) Add control=submission to the relay_from_hosts and authenticated
4839 clients checks, on the grounds that messages accepted by these
4840 statements are most likely to be submissions.
4842 PH/02 Several tidies to the handling of ${prvs and ${prvscheck:
4844 (1) Generate an error if the third argument for the ${prvs expansion is
4847 (2) Treat a missing third argument of ${prvscheck as if it were an empty
4850 (3) Reset the variables that are obtained from the first argument of
4851 ${prvscheck and used in the second argument before leaving the code,
4852 because their memory is reclaimed, so using them afterwards may do
4855 (4) Tidy up the code for expanding the arguments of ${prvscheck one by
4856 one (it's much easier than Tom thought :-).
4858 (5) Because of (4), we can now allow for the use of $prvscheck_result
4859 inside the third argument.
4861 PH/03 For some reason, the default setting of PATH when running a command from
4862 a pipe transport was just "/usr/bin". I have changed it to
4865 PH/04 SUPPORT_TRANSLATE_IP_ADDRESS and MOVE_FROZEN_MESSAGES did not cause
4866 anything to be listed in the output from -bV.
4868 PH/05 When a filter generated an autoreply, the entire To: header line was
4869 quoted in the delivery log line, like this:
4871 => >A.N.Other <ano@some.domain> <original@ddress> ...
4873 This has been changed so that it extracts the operative address. There
4874 may be more than one such address. If so, they are comma-separated, like
4877 => >ano@some.domain,ona@other.domain <original@ddress> ...
4879 PH/06 When a client host used a correct literal IP address in a HELO or EHLO
4880 command, (for example, EHLO [1.2.3.4]) and the client's IP address was
4881 not being looked up in the rDNS to get a host name, Exim was showing the
4882 IP address twice in Received: lines, even though the IP addresses were
4883 identical. For example:
4885 Received: from [1.2.3.4] (helo=[1.2.3.4])
4887 However, if the real host name was known, it was omitting the HELO data
4888 if it matched the actual IP address. This has been tidied up so that it
4889 doesn't show the same IP address twice.
4891 PH/07 When both +timestamp and +memory debugging was on, the value given by
4892 $tod_xxx expansions could be wrong, because the tod_stamp() function was
4893 called by the debug printing, thereby overwriting the timestamp buffer.
4894 Debugging no longer uses the tod_stamp() function when +timestamp is set.
4896 PH/08 When the original message was included in an autoreply transport, it
4897 always said "this is a copy of the message, including all the headers",
4898 even if body_only or headers_only was set. It now gives an appropriate
4901 PH/09 Applied a patch from the Sieve maintainer which:
4903 o fixes some comments
4904 o adds the (disabled) notify extension core
4905 o adds some debug output for the result of if/elsif tests
4906 o points to the current vacation draft in the documentation
4907 and documents the missing references header update
4911 o fixes a bug in processing the envelope test (when testing
4912 multiple envelope elements, the last element determined the
4915 PH/10 Exim was violating RFC 3834 ("Recommendations for Automatic Responses to
4916 Electronic Mail") by including:
4918 Auto-submitted: auto-generated
4920 in the messages that it generates (bounce messages and others, such as
4921 warnings). In the case of bounce messages for non-SMTP messages, there was
4922 also a typo: it was using "Auto_submitted" (underscore instead of
4923 hyphen). Since every message generated by Exim is necessarily in response
4924 to another message, thes have all been changed to:
4926 Auto-Submitted: auto-replied
4928 in accordance with these statements in the RFC:
4930 The auto-replied keyword:
4932 - SHOULD be used on messages sent in direct response to another
4933 message by an automatic process,
4935 - MUST NOT be used on manually-generated messages,
4937 - MAY be used on Delivery Status Notifications (DSNs) and Message
4938 Disposition Notifications (MDNs),
4940 - MUST NOT be used on messages generated by automatic or periodic
4941 processes, except for messages which are automatic responses to
4944 PH/11 Added "${if def:sender_address {(envelope-from <$sender_address>)\n\t}}"
4945 to the default Received: header definition.
4947 PH/12 Added log selector acl_warn_skipped (default on).
4949 PH/13 After a successful wildlsearch lookup, discard the values of numeric
4950 variables because (a) they are in the wrong storage pool and (b) even if
4951 they were copied, it wouldn't work properly because of the caching.
4953 PH/14 Add check_rfc2047_length to disable enforcement of RFC 2047 length
4954 checking when decoding. Apparently there are clients that generate
4955 overlong encoded strings. Why am I not surprised?
4957 PH/15 If the first argument of "${if match_address" was not empty, but did not
4958 contain an "@" character, Exim crashed. Now it writes a panic log message
4959 and treats the condition as false.
4961 PH/16 In autoreply, treat an empty string for "once" the same as unset.
4963 PH/17 A further patch from the Sieve maintainer: "Introduce the new Sieve
4964 extension "envelope-auth". The code is finished and in agreement with
4965 other implementations, but there is no documentation so far and in fact,
4966 nobody wrote the draft yet. This extension is currently #undef'ed, thus
4967 not changing the active code.
4969 Print executed "if" and "elsif" statements when debugging is used. This
4970 helps a great deal to understand what a filter does.
4972 Document more things not specified clearly in RFC3028. I had all this
4973 sorted out, when out of a sudden new issues came to my mind. Oops."
4975 PH/18 Exim was not recognizing the "net-" search type prefix in match_ip lists
4978 PH/19 Exim expands the IPv6 address given to -bh to its full non-abbreviated
4979 canonical form (as documented). However, after a host name lookup from
4980 the IP address, check_host() was doing a simple string comparison with
4981 addresses acquired from the DNS when checking that the found name did
4982 have the original IP as one of its addresses. Since any found IPv6
4983 addresses are likely to be in abbreviated form, the comparison could
4984 fail. Luckily, there already exists a function for doing the comparison
4985 by converting both addresses to binary, so now that is used instead of
4986 the text comparison.
4988 PH/20 There was another similar case to PH/19, when a complete host name was
4989 given in a host list; looking up its IP address could give an abbreviated
4990 form, whereas the current host's name might or might not be abbreviated.
4991 The same fix has been applied.
4997 PH/01 The ${base62: operator adjusted itself to base 36 when BASE_62 was
4998 set to 36 (for Darwin and Cygwin), but the ${base62d: operator did not.
5001 PH/02 Two minor problems detected in Cygwin: the os.{c,h} files had lost */ on
5002 the CVS lines, and there was a missing #if HAVE_IPV6 in host.c.
5004 PH/03 Typo: missing ".o" in src/pcre/Makefile.
5006 PH/04 Tighten up "personal" tests: Instead of testing for any "List-"
5007 header line, restrict the check to what is listed in RFCs 2369 and 2929.
5008 Also, for "Auto-Submitted", treat anything other than "no" as
5009 non-personal, in accordance with RFC 3834. (Previously it treated
5010 anything starting "auto-" as non-personal.)
5012 TF/01 The control=submission/name=... option had a problem with syntax
5013 errors if the name included a slash character. The /name= option
5014 now slurps the rest of the string, so it can include any characters
5015 but it must come last in the list of options (after /sender_retain
5018 PH/05 Some modifications to the interface to the fake nameserver for the new
5026 TK/01 Added the "success_on_redirect" address verification option. See
5027 NewStuff for rationale and an example.
5029 PH/01 Added support for SQLite, basic code supplied by David Woodhouse.
5031 PH/02 Patch to exigrep to allow it to work on syslog lines.
5033 PH/03 When creating an mbox file for a virus/spam scan, use fseek() instead of
5034 fread() to skip over the body file's header line, because in Cygwin the
5035 header line is locked and is inaccessible.
5037 PH/04 Added $message_exim_id, ultimately to replace $message_id (they will both
5038 co-exist for some time) to make it clear that it is the Exim ID that is
5039 referenced, not the Message-ID: header line.
5041 PH/05 Replaced all Tom's calls to snprintf() with calls to the internal
5042 string_format() function, because snprintf() does not exist on all
5045 PH/06 The use of forbid_filter_existstest now also locks out the use of the
5046 ${stat: expansion item.
5048 PH/07 Changed "SMTP protocol violation: synchronization error" into "SMTP
5049 protocol synchronization error", to keep the pedants happy.
5051 PH/08 Arrange for USE_INET_NTOA_FIX to be set in config.h for AIX systems as
5052 well as for IRIX systems, when gcc is being used. See the host.c source
5055 PH/09 Installed latest Cygwin configuration files from the Cygwin maintainer.
5057 PH/10 Named domain lists were not working if used in a queue_smtp_domains
5060 PH/11 Added support for the IGNOREQUOTA extension to LMTP, both to the lmtp
5061 transport and to the smtp transport in LMTP mode.
5063 TK/02 Remove one case of BASE64 error detection FTTB (undocumented anyway).
5065 PH/12 There was a missing call to search_tidyup() before the fork() in rda.c to
5066 run a filter in a subprocess. This could lead to confusion in subsequent
5067 lookups in the parent process. There should also be a search_tidyup() at
5068 the end of the subprocess.
5070 PH/13 Previously, if "verify = helo" was set in an ACL, the condition was true
5071 only if the host matched helo_try_verify_hosts, which caused the
5072 verification to occur when the EHLO/HELO command was issued. The ACL just
5073 tested the remembered result. Now, if a previous verification attempt has
5074 not happened, "verify = helo" does it there and then.
5076 JJ/01 exipick: added $message_exim_id variable (see 4.53-PH/04)
5078 TK/03 Fix log output including CR from clamd.
5080 PH/14 A reference to $reply_address when Reply-to: was empty and From: did not
5081 exist provoked a memory error which could cause a segfault.
5083 PH/15 Installed PCRE 6.2
5085 PH/17 Defined BIND_8_COMPAT in the Darwin os.h file.
5087 PH/18 Reversed 4.52/PH/17 because the HP-UX user found it wasn't the cause
5088 of the problem. Specifically, suggested +O2 rather than +O1 for the
5091 PH/19 Added sqlite_lock_timeout option (David Woodhouse's patch).
5093 PH/20 If a delivery was routed to a non-standard port by means of an SRV
5094 record, the port was not correctly logged when the outgoing_port log
5095 selector was set (it logged the transort's default port).
5097 PH/21 Added support for host-specific ports to manualroute, queryprogram,
5098 fallback_hosts, and "hosts" in the smtp transport.
5100 PH/22 If the log selector "outgoing_port" is set, the port is now also given on
5101 host errors such as "Connection refused".
5103 PH/23 Applied a patch to fix problems with exim-4.52 while doing radius
5104 authentication with radiusclient 0.4.9:
5106 - Error returned from rc_read_config was caught wrongly
5107 - Username/password not passed on to radius server due to wrong length.
5109 The presumption is that some radiusclient API changes for 4.51/PH/17
5110 were not taken care of correctly. The code is still untested by me (my
5111 Linux distribution still has 0.3.2 of radiusclient), but it was
5112 contributed by a Radius user.
5114 PH/24 When doing a callout, the value of $domain wasn't set correctly when
5115 expanding the "port" option of the smtp transport.
5117 TK/04 MIME ACL: Fix buffer underrun that occurs when EOF condition is met
5118 while reading a MIME header. Thanks to Tom Hughes for a patch.
5120 PH/24 Include config.h inside local_scan.h so that configuration settings are
5123 PH/25 Make $smtp_command_argument available after all SMTP commands. This means
5124 that in an ACL for RCPT (for example), you can examine exactly what was
5127 PH/26 Exim was recognizing IPv6 addresses of the form [IPv6:....] in EHLO
5128 commands, but it was not correctly comparing the address with the actual
5129 client host address. Thus, it would show the EHLO address in Received:
5130 header lines when this was not necessary.
5132 PH/27 Added the % operator to ${eval:}.
5134 PH/28 Exim tries to create and chdir to its spool directory when it starts;
5135 it should be ignoring failures (because with -C, for example, it has lost
5136 privilege). It wasn't ignoring creation failures other than "already
5139 PH/29 Added "crypteq" to the list of supported features that Exim outputs when
5142 PH/30 Fixed (presumably very longstanding) bug in exim_dbmbuild: if it failed
5143 because an input line was too long, either on its own, or by virtue of
5144 too many continuations, the temporary file was not being removed, and the
5145 return code was incorrect.
5147 PH/31 Missing "BOOL" in function definition in filtertest.c.
5149 PH/32 Applied Sieve patches from the maintainer.
5151 TK/05 Domainkeys: Accomodate for a minor API change in libdomainkeys 0.67.
5153 PH/33 Added "verify = not_blind".
5155 PH/34 There are settings for CHOWN_COMMAND and MV_COMMAND that can be used in
5156 Local/Makefile (with some defaults set). These are used in built scripts
5157 such as exicyclog, but they have never been used in the exim_install
5158 script (though there are many overriding facilities there). I have
5159 arranged that the exim_install script now takes note of these two
5162 PH/35 Installed configuration files for Dragonfly.
5164 PH/36 When a locally submitted message by a trusted user did not contain a
5165 From: header, and the sender address was obtained from -f or from an SMTP
5166 MAIL command, and the trusted user did not use -F to supply a sender
5167 name, $originator_name was incorrectly used when constructing a From:
5168 header. Furthermore, $originator_name was used for submission mode
5169 messages from external hosts without From: headers in a similar way,
5170 which is clearly wrong.
5172 PH/37 Added control=suppress_local_fixups.
5174 PH/38 When log_selector = +received_sender was set, and the addition of the
5175 sender made the log line's construction buffer exactly full, or one byte
5176 less than full, an overflow happened when the terminating "\n" was
5179 PH/39 Added a new log selector, "unknown_in_list", which provokes a log entry
5180 when the result of a list match is failure because a DNS lookup failed.
5182 PH/40 RM_COMMAND is now used in the building process.
5184 PH/41 Added a "distclean" target to the top-level Makefile; it deletes all
5185 the "build-* directories that it finds.
5187 PH/42 (But a TF fix): In a domain list, Exim incorrectly matched @[] if the IP
5188 address in a domain literal was a prefix of an interface address.
5190 PH/43 (Again a TF fix): In the dnslookup router, do not apply widen_domains
5191 when verifying a sender address, unless rewrite_headers is false.
5193 PH/44 Wrote a long comment about why errors_to addresses are verified as
5194 recipients, not senders.
5196 TF/01 Add missing LIBS=-lm to OS/Makefile-OpenBSD which was overlooked when
5197 the ratelimit ACL was added.
5199 PH/45 Added $smtp_command for the full command (cf $smtp_command_argument).
5201 PH/46 Added extra information about PostgreSQL errors to the error string.
5203 PH/47 Added an interface to a fake DNS resolver for use by the new test suite,
5204 avoiding the need to install special zones in a real server. This is
5205 backwards compatible; if it can't find the fake resolver, it drops back.
5206 Thus, both old and new test suites can be run.
5208 TF/02 Added util/ratelimit.pl
5210 TF/03 Minor fix to the ratelimit code to improve its behaviour in case the
5211 clock is set back in time.
5213 TF/04 Fix the ratelimit support in exim_fixdb. Patch provided by Brian
5214 Candler <B.Candler@pobox.com>.
5216 TF/05 The fix for PH/43 was not completely correct; widen_domains is always
5217 OK for addresses that are the result of redirections.
5219 PH/48 A number of further additions for the benefit of the new test suite,
5220 including a fake gethostbyname() that interfaces to the fake DNS resolver
5223 TF/06 The fix for widen_domains has also been applied to qualify_single and
5224 search_parents which are the other dnslookup options that can cause
5227 PH/49 Michael Haardt's randomized retrying, but as a separate retry parameter
5230 PH/50 Make never_users, trusted_users, admin_groups, trusted_groups expandable.
5232 TF/07 Exim produced the error message "an SRV record indicated no SMTP
5233 service" if it encountered an MX record with an empty target hostname.
5234 The message is now "an MX or SRV record indicated no SMTP service".
5236 TF/08 Change PH/13 introduced the possibility that verify=helo may defer,
5237 if the DNS of the sending site is misconfigured. This is quite a
5238 common situation. This change restores the behaviour of treating a
5239 helo verification defer as a failure.
5241 PH/51 If self=fail was set on a router, the bounce message did not include the
5242 actual error message.
5248 TF/01 Added support for Client SMTP Authorization. See NewStuff for details.
5250 PH/01 When a transport filter timed out in a pipe delivery, and the pipe
5251 command itself ended in error, the underlying message about the transport
5252 filter timeout was being overwritten with the pipe command error. Now the
5253 underlying error message should be appended to the second error message.
5255 TK/01 Fix poll() being unavailable on Mac OSX 10.2.
5257 PH/02 Reduce the amount of output that "make" produces by default. Full output
5258 can still be requested.
5260 PH/03 The warning log line about a condition test deferring for a "warn" verb
5261 was being output only once per connection, rather than after each
5262 occurrence (because it was using the same function as for successful
5263 "warn" verbs). This seems wrong, so I have changed it.
5265 TF/02 Two buglets in acl.c which caused Exim to read a few bytes of memory that
5266 it should not have, which might have caused a crash in the right
5267 circumstances, but probably never did.
5269 PH/04 Installed a modified version of Tony Finch's patch to make submission
5270 mode fix the return path as well as the Sender: header line, and to
5271 add a /name= option so that you can make the user's friendly name appear
5274 TF/03 Added the control = fakedefer ACL modifier.
5276 TF/04 Added the ratelimit ACL condition. See NewStuff for details. Thanks to
5277 Mark Lowes for thorough testing.
5279 TK/02 Rewrote SPF support to work with libspf2 versions >1.2.0.
5281 TK/03 Merged latest SRS patch from Miles Wilton.
5283 PH/05 There's a shambles in IRIX6 - it defines EX_OK in unistd.h which conflicts
5284 with the definition in sysexits.h (which is #included earlier).
5285 Fortunately, Exim does not actually use EX_OK. The code used to try to
5286 preserve the sysexits.h value, by assuming that macro definitions were
5287 scanned for macro replacements. I have been disabused of this notion,
5288 so now the code just undefines EX_OK before #including unistd.h.
5290 PH/06 There is a timeout for writing blocks of data, set by, e.g. data_timeout
5291 in the smtp transport. When a block could not be written in a single
5292 write() function, the timeout was being re-applied to each part-write.
5293 This seems wrong - if the receiver was accepting one byte at a time it
5294 would take for ever. The timeout is now adjusted when this happens. It
5295 doesn't have to be particularly precise.
5297 TK/04 Added simple SPF lookup method in EXPERIMENTAL_SPF. See NewStuff for
5298 details. Thanks to Chris Webb <chris@arachsys.com> for the patch!
5300 PH/07 Added "fullpostmaster" verify option, which does a check to <postmaster>
5301 without a domain if the check to <postmaster@domain> fails.
5303 SC/01 Eximstats: added -xls and the ability to specify output files
5304 (patch written by Frank Heydlauf).
5306 SC/02 Eximstats: use FileHandles for outputting results.
5308 SC/03 Eximstats: allow any combination of xls, txt, and html output.
5310 SC/04 Eximstats: fixed display of large numbers with -nvr option
5312 SC/05 Eximstats: fixed merging of reports with empty tables.
5314 SC/06 Eximstats: added the -include_original_destination flag
5316 SC/07 Eximstats: removed tabs and trailing whitespace.
5318 TK/05 Malware: Improve on aveserver error handling. Patch from Alex Miller.
5320 TK/06 MBOX spool code: Add real "From " MBOX separator line
5321 so the .eml file is really in mbox format (even though
5322 most programs do not really care). Patch from Alex Miller.
5324 TK/07 MBOX spool code: Add X-Envelope-From: and X-Envelope-To: headers.
5325 The latter is generated from $received_to and is only set if the
5326 message has one envelope recipient. SA can use these headers,
5327 obviously out-of-the-box. Patch from Alex Miller.
5329 PH/08 The ${def test on a variable was returning false if the variable's
5330 value was "0", contrary to what the specification has always said!
5331 The result should be true unless the variable is empty.
5333 PH/09 The syntax error of a character other than { following "${if
5334 def:variable_name" (after optional whitespace) was not being diagnosed.
5335 An expansion such as ${if def:sender_ident:{xxx}{yyy}} in which an
5336 accidental colon was present, for example, could give incorrect results.
5338 PH/10 Tidied the code in a number of places where the st_size field of a stat()
5339 result is used (not including appendfile, where other changes are about
5342 PH/11 Upgraded appendfile so that quotas larger than 2G are now supported.
5343 This involved changing a lot of size variables from int to off_t. It
5344 should work with maildirs and everything.
5346 TK/08 Apply fix provided by Michael Haardt to prevent deadlock in case of
5347 spamd dying while we are connected to it.
5349 TF/05 Fixed a ${extract error message typo reported by Jeremy Harris
5352 PH/12 Applied Alex Kiernan's patch for the API change for the error callback
5353 function for BDB 4.3.
5355 PH/13 Changed auto_thaw such that it does not apply to bounce messages.
5357 PH/14 Imported PCRE 6.0; this was more than just a trivial operation because
5358 the sources for PCRE have been re-arranged and more files are now
5361 PH/15 The code I had for printing potentially long long variables in PH/11
5362 above was not the best (it lost precision). The length of off_t variables
5363 is now inspected at build time, and an appropriate printing format (%ld
5364 or %lld) is chosen and #defined by OFF_T_FMT. We also define LONGLONG_T
5365 to be "long long int" or "long int". This is needed for the internal
5366 formatting function string_vformat().
5368 PH/16 Applied Matthew Newton's patch to exicyclog: "If log_file_path is set in
5369 the configuration file to be ":syslog", then the script "guesses" where
5370 the logs files are, rather than using the compiled in default. In our
5371 case the guess is not the same as the compiled default, so the script
5372 suddenly stopped working when I started to use syslog. The patch checks
5373 to see if log_file_path is "". If so, it attempts to read it from exim
5374 with no configuration file to get the compiled in version, before it
5375 falls back to the previous guessing code."
5377 TK/09 Added "prvs" and "prvscheck" expansion items. These help a lot with
5378 implementing BATV in an Exim configuration. See NewStuff for the gory
5381 PH/17 Applied Michael Haardt's patch for HP-UX, affecting only the os.h and
5382 Makefile that are specific to HP-UX.
5384 PH/18 If the "use_postmaster" option was set for a recipient callout together
5385 with the "random" option, the postmaster address was used as the MAIL
5386 FROM address for the random test, but not for the subsequent recipient
5387 test. It is now used for both.
5389 PH/19 Applied Michael Haardt's patch to update Sieve to RFC3028bis. "The
5390 patch removes a few documentation additions to RFC 3028, because the
5391 latest draft now contains them. It adds the new en;ascii-case comparator
5392 and a new error check for 8bit text in MIME parts. Comparator and
5393 require names are now matched exactly. I enabled the subaddress
5394 extension, but it is not well tested yet (read: it works for me)."
5396 PH/20 Added macros for time_t as for off_t (see PH/15 above) and used them to
5397 rework some of the code of TK/09 above to avoid the hardwired use of
5398 "%lld" and "long long". Replaced the call to snprintf() with a call to
5401 PH/21 Added some other messages to those in 4.51/PH/42, namely "All relevant MX
5402 records point to non-existent hosts", "retry timeout exceeded", and
5403 "retry time not reached for any host after a long failure period".
5405 PH/22 Fixed some oversights/typos causing bugs when Exim is compiled with
5406 experimental DomainKeys support:
5408 (1) The filter variables $n0-$n9 and $sn0-$sn9 were broken.
5409 (2) On an error such as an illegally used "control", the wrong name for
5410 the control was given.
5412 These problems did NOT occur unless DomainKeys support was compiled.
5414 PH/23 Added daemon_startup_retries and daemon_startup_sleep.
5416 PH/24 Added ${if match_ip condition.
5418 PH/25 Put debug statements on either side of calls to EXIM_DBOPEN() for hints
5419 databases so that it will be absolutely obvious if a crash occurs in the
5420 DB library. This is a regular occurrence (often caused by mis-matched
5423 PH/26 Insert a lot of missing (void) casts for functions such as chown(),
5424 chmod(), fcntl(), sscanf(), and other functions from stdio.h. These were
5425 picked up on a user's system that detects such things. There doesn't seem
5426 to be a gcc warning option for this - only an attribute that has to be
5427 put on the function's prototype. It seems that in Fedora Core 4 they have
5428 set this on a number of new functions. No doubt there will be more in due
5431 PH/27 If a dnslookup or manualroute router is set with verify=only, it need not
5432 specify a transport. However, if an address that was verified by such a
5433 router was the subject of a callout, Exim crashed because it tried to
5434 read the rcpt_include_affixes from the non-existent transport. Now it
5435 just assumes that the setting of that option is false. This bug was
5436 introduced by 4.51/PH/31.
5438 PH/28 Changed -d+all to exclude +memory, because that information is very
5439 rarely of interest, but it makes the output a lot bigger. People tend to
5440 do -d+all out of habit.
5442 PH/29 Removed support for the Linux-libc5 build, as it is obsolete and the
5443 code in os-type was giving problems when libc.so lives in lib64, like on
5446 PH/30 Exim's DNS code uses the original T_xxx names for DNS record times. These
5447 aren't the modern standard, and it seems that some systems' include files
5448 don't always have them. Exim was already checking for some of the newer
5449 ones like T_AAAA, and defining it itself. I've added checks for all the
5450 record types that Exim uses.
5452 PH/31 When using GnuTLS, if the parameters cache file did not exist, Exim was
5453 not automatically generating a new one, as it is supposed to. This
5454 prevented TLS from working. If the file did exist, but contained invalid
5455 data, a new version was generated, as expected. It was only the case of a
5456 non-existent file that was broken.
5458 TK/10 Domainkeys: Fix a bug in verification that caused a crash in conjunction
5459 with a change in libdomainkeys > 0.64.
5461 TK/11 Domainkeys: Change the logic how the "testing" policy flag is retrieved
5462 from DNS. If the selector record carries the flag, it now has
5463 precedence over the domain-wide flag.
5465 TK/12 Cleared some compiler warnings related to SPF, SRS and DK code.
5467 PH/32 In mua_wrapper mode, if an smtp transport configuration error (such as
5468 the use of a port name that isn't defined in /etc/services) occurred, the
5469 message was deferred as in a normal delivery, and thus remained on the
5470 spool, instead of being failed because of the mua_wrapper setting. This
5471 is now fixed, and I tidied up some of the mua_wrapper messages at the
5474 SC/08 Eximstats: whilst parsing the mainlog(s), store information about
5475 the messages in a hash of arrays rather than using individual hashes.
5476 This is a bit cleaner and results in dramatic memory savings, albeit
5477 at a slight CPU cost.
5479 SC/09 Eximstats: added the -show_rt<list> and the -show_dt<list> flags
5480 as requested by Marc Sherman.
5482 SC/10 Eximstats: added histograms for user specified patterns as requested
5485 SC/11 Eximstats: v1.43 - bugfix for pattern histograms with -h0 specified.
5487 PH/33 Patch from the Cygwin maintainer to add "b" to all occurences of
5488 fopen() in the content-scanning modules that did not already have it.
5494 TK/01 Added Yahoo DomainKeys support via libdomainkeys. See
5495 doc/experimental-spec.txt for details. (http://domainkeys.sf.net)
5497 TK/02 Fix ACL "control" statement not being available in MIME ACL.
5499 TK/03 Fix ACL "regex" condition not being available in MIME ACL.
5501 PH/01 Installed a patch from the Sieve maintainer that allows -bf to be used
5502 to test Sieve filters that use "vacation".
5504 PH/02 Installed a slightly modified version of Nikos Mavrogiannopoulos' patch
5505 that changes the way the GnuTLS parameters are stored in the cache file.
5506 The new format can be generated externally. For backward compatibility,
5507 if the data in the cache doesn't make sense, Exim assumes it has read an
5508 old-format file, and it generates new data and writes a new file. This
5509 means that you can't go back to an older release without removing the
5512 PH/03 A redirect router that has both "unseen" and "one_time" set does not
5513 work if there are any delivery delays because "one_time" forces the
5514 parent to be marked "delivered", so its unseen clone is never tried
5515 again. For this reason, Exim now forbids the simultaneous setting of
5518 PH/04 Change 4.11/85 fixed an obscure bug concerned with addresses that are
5519 redirected to themselves ("homonym" addresses). Read the long ChangeLog
5520 entry if you want to know the details. The fix, however, neglected to
5521 consider the case when local delivery batching is involved. The test for
5522 "previously delivered" was not happening when checking to see if an
5523 address could be batched with a previous (undelivered) one; under
5524 certain circumstances this could lead to multiple deliveries to the same
5527 PH/05 Renamed the macro SOCKLEN_T as EXIM_SOCKLEN_T because AIX uses SOCKLEN_T
5528 in its include files, and this causes problems building Exim.
5530 PH/06 A number of "verify =" ACL conditions have no options (e.g. verify =
5531 header_syntax) but Exim was just ignoring anything given after a slash.
5532 In particular, this caused confusion with an attempt to use "verify =
5533 reverse_host_lookup/defer_ok". An error is now given when options are
5534 supplied for verify items that do not have them. (Maybe reverse_host_
5535 lookup should have a defer_ok option, but that's a different point.)
5537 PH/07 Increase the size of the buffer for incoming SMTP commands from 512 (as
5538 defined by RFC 821) to 2048, because there were problems with some AUTH
5539 commands, and RFC 1869 says the size should be increased for extended
5540 SMTP commands that take arguments.
5542 PH/08 Added ${dlfunc dynamically loaded function for expansion (code from Tony
5545 PH/09 Previously, an attempt to use ${perl when it wasn't compiled gave an
5546 "unknown" error; now it says that the functionality isn't in the binary.
5548 PH/10 Added a nasty fudge to try to recognize and flatten LDAP passwords in
5549 an address' error message when a string expansion fails (syntax or
5550 whatever). Otherwise the password may appear in the log. Following change
5551 PH/42 below, there is no longer a chance of it appearing in a bounce
5554 PH/11 Installed exipick version 20050225.0 from John Jetmore.
5556 PH/12 If the last host in a fallback_hosts list was multihomed, only the first
5557 of its addresses was ever tried. (Bugzilla bug #2.)
5559 PH/13 If "headers_add" in a transport didn't end in a newline, Exim printed
5560 the result incorrectly in the debug output. (It correctly added a newline
5561 to what was transported.)
5563 TF/01 Added $received_time.
5565 PH/14 Modified the default configuration to add an acl_smtp_data ACL, with
5566 commented out examples of how to interface to a virus scanner and to
5567 SpamAssassin. Also added commented examples of av_scanner and
5568 spamd_address settings.
5570 PH/15 Further to TK/02 and TK/03 above, tidied up the tables of what conditions
5571 and controls are allowed in which ACLs. There were a couple of minor
5572 errors. Some of the entries in the conditions table (which is a table of
5573 where they are NOT allowed) were getting very unwieldy; rewrote them as a
5574 negation of where the condition IS allowed.
5576 PH/16 Installed updated OS/os.c-cygwin from the Cygwin maintainer.
5578 PH/17 The API for radiusclient changed at release 0.4.0. Unfortunately, the
5579 header file does not have a version number, so I've had to invent a new
5580 value for RADIUS_LIB_TYPE, namely "RADIUSCLIENTNEW" to request the new
5581 API. The code is untested by me (my Linux distribution still has 0.3.2 of
5582 radiusclient), but it was contributed by a Radius user.
5584 PH/18 Installed Lars Mainka's patch for the support of CRL collections in
5585 files or directories, for OpenSSL.
5587 PH/19 When an Exim process that is running as root has to create an Exim log
5588 file, it does so in a subprocess that runs as exim:exim so as to get the
5589 ownership right at creation (otherwise, other Exim processes might see
5590 the file with the wrong ownership). There was no test for failure of this
5591 fork() call, which would lead to the process getting stuck as it waited
5592 for a non-existent subprocess. Forks do occasionally fail when resources
5593 run out. I reviewed all the other calls to fork(); they all seem to check
5596 PH/20 When checking for unexpected SMTP input at connect time (before writing
5597 the banner), Exim was not dealing correctly with a non-positive return
5598 from the read() function. If the client had disconnected by this time,
5599 the result was a log entry for a synchronization error with an empty
5600 string after "input=" when read() returned zero. If read() returned -1
5601 (an event I could not check), uninitialized data bytes were printed.
5602 There were reports of junk text (parts of files, etc) appearing after
5605 PH/21 Added acl_not_smtp_mime to allow for MIME scanning for non-SMTP messages.
5607 PH/22 Added support for macro redefinition, and (re)definition in between
5608 driver and ACL definitions.
5610 PH/23 The cyrus_sasl authenticator was expanding server_hostname, but then
5611 forgetting to use the resulting value; it was using the unexpanded value.
5613 PH/24 The cyrus_sasl authenticator was advertising mechanisms for which it
5614 hadn't been configured. The fix is from Juergen Kreileder, who
5615 understands it better than I do:
5617 "Here's what I see happening with three configured cyrus_sasl
5618 authenticators configured (plain, login, cram-md5):
5620 On startup auth_cyrus_sasl_init() gets called for each of these.
5621 This means three calls to sasl_listmech() without a specified mech_list.
5622 => SASL tests which mechs of all available mechs actually work
5623 => three warnings about OTP not working
5624 => the returned list contains: plain, login, cram-md5, digest-md5, ...
5626 With the patch, sasl_listmech() also gets called three times. But now
5627 SASL's mech_list option is set to the server_mech specified in the the
5628 authenticator. Or in other words, the answer from sasl_listmech()
5629 gets limited to just the mech you're testing for (which is different
5631 => the return list contains just 'plain' or 'login', 'cram-md5' or
5632 nothing depending on the value of ob->server_mech.
5634 I've just tested the patch: Authentication still works fine,
5635 unavailable mechs specified in the exim configuration are still
5636 caught, and the auth.log warnings about OTP are gone."
5638 PH/25 When debugging is enabled, the contents of the command line are added
5639 to the debugging output, even when log_selector=+arguments is not
5642 PH/26 Change scripts/os-type so that when "uname -s" returns just "GNU", the
5643 answer is "GNU", and only if the return is "GNU/something" is the answer
5646 PH/27 $acl_verify_message is now set immediately after the failure of a
5647 verification in an ACL, and so is available in subsequent modifiers. In
5648 particular, the message can be preserved by coding like this:
5650 warn !verify = sender
5651 set acl_m0 = $acl_verify_message
5653 Previously, $acl_verify_message was set only while expanding "message"
5654 and "log_message" when a very denied access.
5656 PH/28 Modified OS/os.c-Linux with
5658 -#ifndef OS_LOAD_AVERAGE
5659 +#if !defined(OS_LOAD_AVERAGE) && defined(__linux__)
5661 to make Exim compile on kfreebsd-gnu. (I'm totally confused about the
5662 nomenclature these days.)
5664 PH/29 Installed patch from the Sieve maintainer that adds the options
5665 sieve_useraddress and sieve_subaddress to the redirect router.
5667 PH/30 In these circumstances:
5668 . Two addresses routed to the same list of hosts;
5669 . First host does not offer TLS;
5670 . First host accepts first address;
5671 . First host gives temporary error to second address;
5672 . Second host offers TLS and a TLS session is established;
5673 . Second host accepts second address.
5674 Exim incorrectly logged both deliveries with the TLS parameters (cipher
5675 and peerdn, if requested) that were in fact used only for the second
5678 PH/31 When doing a callout as part of verifying an address, Exim was not paying
5679 attention to any local part prefix or suffix that was matched by the
5680 router that accepted the address. It now behaves in the same way as it
5681 does for delivery: the affixes are removed from the local part unless
5682 rcpt_include_affixes is set on the transport.
5684 PH/32 Add the sender address, as F=<...>, to the log line when logging a
5685 timeout during the DATA phase of an incoming message.
5687 PH/33 Sieve envelope tests were broken for match types other than :is. I have
5688 applied a patch sanctioned by the Sieve maintainer.
5690 PH/34 Change 4.50/80 broke Exim in that it could no longer handle cases where
5691 the uid or gid is negative. A case of a negative gid caused this to be
5692 noticed. The fix allows for either to be negative.
5694 PH/35 ACL_WHERE_MIME is now declared unconditionally, to avoid too much code
5695 clutter, but the tables that are indexed by ACL_WHERE_xxx values had been
5698 PH/36 The change PH/12 above was broken. Fixed it.
5700 PH/37 Exim used to check for duplicate addresses in the middle of routing, on
5701 the grounds that routing the same address twice would always produce the
5702 same answer. This might have been true once, but it is certainly no
5703 longer true now. Routing a child address may depend on the previous
5704 routing that produced that child. Some complicated redirection strategies
5705 went wrong when messages had multiple recipients, and made Exim's
5706 behaviour dependent on the order in which the addresses were given.
5708 I have moved the duplicate checking until after the routing is complete.
5709 Exim scans the addresses that are assigned to local and remote
5710 transports, and removes any duplicates. This means that more work will be
5711 done, as duplicates will always all be routed, but duplicates are
5712 presumably rare, so I don't expect this is of any significance.
5714 For deliveries to pipes, files, and autoreplies, the duplicate checking
5715 still happens during the routing process, since they are not going to be
5718 PH/38 Installed a patch from Ian Freislich, with the agreement of Tom Kistner.
5719 It corrects a timeout issue with spamd. This is Ian's comment: "The
5720 background is that sometimes spamd either never reads data from a
5721 connection it has accepted, or it never writes response data. The exiscan
5722 spam.[ch] uses a 3600 second timeout on spamd socket reads, further, it
5723 blindly assumes that writes won't block so it may never time out."
5725 PH/39 Allow G after quota size as well as K and M.
5727 PH/40 The value set for $authenticated_id in an authenticator may not contain
5728 binary zeroes or newlines because the value is written to log lines and
5729 to spool files. There was no check on this. Now the value is run through
5730 the string_printing() function so that such characters are converted to
5731 printable escape sequences.
5733 PH/41 $message_linecount is a new variable that contains the total number of
5734 lines in the message. Compare $body_linecount, which is the count for the
5737 PH/42 Exim no longer gives details of delivery errors for specific addresses in
5738 bounce and delay warning messages, except in certain special cases, which
5741 (a) An SMTP error message from a remote host;
5742 (b) A message specified in a :fail: redirection;
5743 (c) A message specified in a "fail" command in a system filter;
5744 (d) A message specified in a FAIL return from the queryprogram router;
5745 (e) A message specified by the cannot_route_message router option.
5747 In these cases only, Exim does include the error details in bounce and
5748 warning messages. There are also a few cases where bland messages such
5749 as "unrouteable address" or "local delivery error" are given.
5751 PH/43 $value is now also set for the "else" part of a ${run expansion.
5753 PH/44 Applied patch from the Sieve maintainer: "The vacation draft is still
5754 being worked on, but at least Exim now implements the latest version to
5757 PH/45 In a pipe transport, although a timeout while waiting for the pipe
5758 process to complete was treated as a delivery failure, a timeout while
5759 writing the message to the pipe was logged, but erroneously treated as a
5760 successful delivery. Such timeouts include transport filter timeouts. For
5761 consistency with the overall process timeout, these timeouts are now
5762 treated as errors, giving rise to delivery failures by default. However,
5763 there is now a new Boolean option for the pipe transport called
5764 timeout_defer, which, if set TRUE, converts the failures into defers for
5765 both kinds of timeout. A transport filter timeout is now identified in
5768 PH/46 The "scripts/Configure-config.h" script calls "make" at one point. On
5769 systems where "make" and "gmake" are different, calling "gmake" at top
5770 level broke things. I've arranged for the value of $(MAKE) to be passed
5771 from the Makefile to this script so that it can call the same version of
5775 A note about Exim versions 4.44 and 4.50
5776 ----------------------------------------
5778 Exim 4.50 was meant to be the next release after 4.43. It contains a lot of
5779 changes of various kinds. As a consequence, a big documentation update was
5780 needed. This delayed the release for rather longer than seemed good, especially
5781 in the light of a couple of (minor) security issues. Therefore, the changes
5782 that fixed bugs were backported into 4.43, to create a 4.44 maintenance
5783 release. So 4.44 and 4.50 are in effect two different branches that both start
5786 I have left the 4.50 change log unchanged; it contains all the changes since
5787 4.43. The change log for 4.44 is below; many of its items are identical to
5788 those for 4.50. This seems to be the most sensible way to preserve the
5789 historical information.
5795 1. Minor wording change to the doc/README.SIEVE file.
5797 2. Change 4.43/35 introduced a bug: if quota_filecount was set, the
5798 computation of the current number of files was incorrect.
5800 3. Closing a stable door: arrange to panic-die if setitimer() ever fails. The
5801 bug fixed in 4.43/37 would have been diagnosed quickly if this had been in
5804 4. Give more explanation in the error message when the command for a transport
5805 filter fails to execute.
5807 5. There are several places where Exim runs a non-Exim command in a
5808 subprocess. The SIGUSR1 signal should be disabled for these processes. This
5809 was being done only for the command run by the queryprogram router. It is
5810 now done for all such subprocesses. The other cases are: ${run, transport
5811 filters, and the commands run by the lmtp and pipe transports.
5813 6. Added CONFIGURE_GROUP build-time option.
5815 7. Some older OS have a limit of 256 on the maximum number of file
5816 descriptors. Exim was using setrlimit() to set 1000 as a large value
5817 unlikely to be exceeded. Change 4.43/17 caused a lot of logging on these
5818 systems. I've change it so that if it can't get 1000, it tries for 256.
5820 8. "control=submission" was allowed, but had no effect, in a DATA ACL. This
5821 was an oversight, and furthermore, ever since the addition of extra
5822 controls (e.g. 4.43/32), the checks on when to allow different forms of
5823 "control" were broken. There should now be diagnostics for all cases when a
5824 control that does not make sense is encountered.
5826 9. Added the /retain_sender option to "control=submission".
5828 10. $recipients is now available in the predata ACL (oversight).
5830 11. Tidy the search cache before the fork to do a delivery from a message
5831 received from the command line. Otherwise the child will trigger a lookup
5832 failure and thereby defer the delivery if it tries to use (for example) a
5833 cached ldap connection that the parent has called unbind on.
5835 12. If verify=recipient was followed by verify=sender in a RCPT ACL, the value
5836 of $address_data from the recipient verification was clobbered by the
5837 sender verification.
5839 13. The value of address_data from a sender verification is now available in
5840 $sender_address_data in subsequent conditions in the ACL statement.
5842 14. Added forbid_sieve_filter and forbid_exim_filter to the redirect router.
5844 15. Added a new option "connect=<time>" to callout options, to set a different
5847 16. If FIXED_NEVER_USERS was defined, but empty, Exim was assuming the uid 0
5848 was its contents. (It was OK if the option was not defined at all.)
5850 17. A "Completed" log line is now written for messages that are removed from
5851 the spool by the -Mrm option.
5853 18. New variables $sender_verify_failure and $recipient_verify_failure contain
5854 information about exactly what failed.
5856 19. Added -dd to debug only the daemon process.
5858 20. Incorporated Michael Haardt's patch to ldap.c for improving the way it
5859 handles timeouts, both on the server side and network timeouts. Renamed the
5860 CONNECT parameter as NETTIMEOUT (but kept the old name for compatibility).
5862 21. The rare case of EHLO->STARTTLS->HELO was setting the protocol to "smtp".
5863 It is now set to "smtps".
5865 22. $host_address is now set to the target address during the checking of
5866 ignore_target_hosts.
5868 23. When checking ignore_target_hosts for an ipliteral router, no host name was
5869 being passed; this would have caused $sender_host_name to have been used if
5870 matching the list had actually called for a host name (not very likely,
5871 since this list is usually IP addresses). A host name is now passed as
5874 24. Changed the calls that set up the SIGCHLD handler in the daemon to use the
5875 code that specifies a non-restarting handler (typically sigaction() in
5876 modern systems) in an attempt to fix a rare and obscure crash bug.
5878 25. Narrowed the window for a race in the daemon that could cause it to ignore
5879 SIGCHLD signals. This is not a major problem, because they are used only to
5880 wake it up if nothing else does.
5882 26. A malformed maildirsize file could cause Exim to calculate negative values
5883 for the mailbox size or file count. Odd effects could occur as a result.
5884 The maildirsize information is now recalculated if the size or filecount
5887 27. Added HAVE_SYS_STATVFS_H to the os.h file for Linux, as it has had this
5888 support for a long time. Removed HAVE_SYS_VFS_H.
5890 28. Installed the latest version of exipick from John Jetmore.
5892 29. In an address list, if the pattern was not a regular expression, an empty
5893 subject address (from a bounce message) matched only if the pattern was an
5894 empty string. Non-empty patterns were not even tested. This was the wrong
5895 because it is perfectly reasonable to use an empty address as part of a
5896 database query. An empty address is now tested by patterns that are
5897 lookups. However, all the other forms of pattern expect the subject to
5898 contain a local part and a domain, and therefore, for them, an empty
5899 address still always fails if the pattern is not itself empty.
5901 30. Exim went into a mad DNS loop when attempting to do a callout where the
5902 host was specified on an smtp transport, and looking it up yielded more
5903 than one IP address.
5905 31. Re-factored the code for checking spool and log partition space into a
5906 function that finds that data and another that does the check. The former
5907 is then used to implement four new variables: $spool_space, $log_space,
5908 $spool_inodes, and $log_inodes.
5910 32. The RFC2047 encoding function was originally intended for short strings
5911 such as real names; it was not keeping to the 75-character limit for
5912 encoded words that the RFC imposes. It now respects the limit, and
5913 generates multiple encoded words if necessary. To be on the safe side, I
5914 have increased the buffer size for the ${rfc2047: expansion operator from
5917 33. It is now permitted to omit both strings after an "if" condition; if the
5918 condition is true, the result is "true". As before, when the second string
5919 is omitted, a false condition yields an empty string. This makes it less
5920 cumbersome to write custom ACL and router conditions.
5922 34. Failure to deliver a bounce message always caused it to be frozen, even if
5923 there was an errors_to setting on the router. The errors_to setting is now
5926 35. If an IPv6 address is given for -bh or -bhc, it is now converted to the
5927 canonical form (fully expanded) before being placed in
5928 $sender_host_address.
5930 36. The table in the code that translates DNS record types into text (T_A to
5931 "A" for instance) was missing entries for NS and CNAME. It is just possible
5932 that this could have caused confusion if both these types were looked up
5933 for the same domain, because the text type is used as part of Exim's
5934 per-process caching. But the chance of anyone hitting this buglet seems
5937 37. The dnsdb lookup has been extended in a number of ways.
5939 (1) There is a new type, "zns", which walks up the domain tree until it
5940 finds some nameserver records. It should be used with care.
5942 (2) There is a new type, "mxh", which is like "mx" except that it returns
5943 just the host names, not the priorities.
5945 (3) It is now possible to give a list of domains (or IP addresses) to be
5946 looked up. The behaviour when one of the lookups defers can be
5947 controlled by a keyword.
5949 (4) It is now possible to specify the separator character for use when
5950 multiple records are returned.
5952 38. The dnslists ACL condition has been extended: it is now possible to supply
5953 a list of IP addresses and/or domains to be looked up in a particular DNS
5956 39. Added log_selector=+queue_time_overall.
5958 40. When running the queue in the test harness, wait just a tad after forking a
5959 delivery process, to get repeatability of debugging output.
5961 41. Include certificate and key file names in error message when GnuTLS fails
5962 to set them up, because the GnuTLS error message doesn't include the name
5963 of the failing file when there is a problem reading it.
5965 42. Allow both -bf and -bF in the same test run.
5967 43. Did the same fix as 41 above for OpenSSL, which had the same infelicity.
5969 44. The "Exiscan patch" is now merged into the mainline Exim source.
5971 45. Sometimes the final signoff response after QUIT could fail to get
5972 transmitted in the non-TLS case. Testing !tls_active instead of tls_active
5973 < 0 before doing a fflush(). This bug looks as though it goes back to the
5974 introduction of TLS in release 3.20, but "sometimes" must have been rare
5975 because the tests only now provoked it.
5977 46. Reset the locale to "C" after calling embedded Perl, in case it was changed
5978 (this can affect the format of dates).
5980 47. exim_tidydb, when checking for the continued existence of a message for
5981 which it has found a message-specific retry record, was not finding
5982 messages that were in split spool directories. Consequently, it was
5983 deleting retry records that should have stayed in existence.
5985 48. Steve fixed some bugs in eximstats.
5987 49. The SPA authentication driver was not abandoning authentication and moving
5988 on to the next authenticator when an expansion was forced to fail,
5989 contradicting the general specification for all authenticators. Instead it
5990 was generating a temporary error. It now behaves as specified.
5992 50. The default ordering of permitted cipher suites for GnuTLS was pessimal
5993 (the order specifies the preference for clients). The order is now AES256,
5994 AES128, 3DES, ARCFOUR128.
5996 51. Small patch to Sieve code - explicitly set From: when generating an
5999 52. Exim crashed if a remote delivery caused a very long error message to be
6000 recorded - for instance if somebody sent an entire SpamAssassin report back
6001 as a large number of 550 error lines. This bug was coincidentally fixed by
6002 increasing the size of one of Exim's internal buffers (big_buffer) that
6003 happened as part of the Exiscan merge. However, to be on the safe side, I
6004 have made the code more robust (and fixed the comments that describe what
6007 53. Now that there can be additional text after "Completed" in log lines (if
6008 the queue_time_overall log selector is set), a one-byte patch to exigrep
6009 was needed to allow it to recognize "Completed" as not the last thing in
6012 54. The LDAP lookup was not handling a return of LDAP_RES_SEARCH_REFERENCE. A
6013 patch that reportedly fixes this has been added. I am not expert enough to
6014 create a test for it. This is what the patch creator wrote:
6016 "I found a little strange behaviour of ldap code when working with
6017 Windows 2003 AD Domain, where users was placed in more than one
6018 Organization Units. When I tried to give exim partial DN, the exit code
6019 of ldap_search was unknown to exim because of LDAP_RES_SEARCH_REFERENCE.
6020 But simultaneously result of request was absolutely normal ldap result,
6021 so I produce this patch..."
6023 Later: it seems that not all versions of LDAP support LDAP_RES_SEARCH_
6024 REFERENCE, so I have modified the code to exclude the patch when that macro
6027 55. Some experimental protocols are using DNS PTR records for new purposes. The
6028 keys for these records are domain names, not reversed IP addresses. The
6029 dnsdb PTR lookup now tests whether its key is an IP address. If not, it
6030 leaves it alone. Component reversal etc. now happens only for IP addresses.
6033 56. Improve error message when ldap_search() fails in OpenLDAP or Solaris LDAP.
6035 57. Double the size of the debug message buffer (to 2048) so that more of very
6036 long debug lines gets shown.
6038 58. The exicyclog utility now does better if the number of log files to keep
6039 exceeds 99. In this case, it numbers them 001, 002 ... instead of 01, 02...
6041 59. Two changes related to the smtp_active_hostname option:
6043 (1) $smtp_active_hostname is now available as a variable.
6044 (2) The default for smtp_banner uses $smtp_active_hostname instead
6045 of $primary_hostname.
6047 60. The host_aton() function is supposed to be passed a string that is known
6048 to be a valid IP address. However, in the case of IPv6 addresses, it was
6049 not checking this. This is a hostage to fortune. Exim now panics and dies
6050 if the condition is not met. A case was found where this could be provoked
6051 from a dnsdb PTR lookup with an IPv6 address that had more than 8
6052 components; fortuitously, this particular loophole had already been fixed
6053 by change 4.50/55 above.
6055 If there are any other similar loopholes, the new check in host_aton()
6056 itself should stop them being exploited. The report I received stated that
6057 data on the command line could provoke the exploit when Exim was running as
6058 exim, but did not say which command line option was involved. All I could
6059 find was the use of -be with a bad dnsdb PTR lookup, and in that case it is
6060 running as the user.
6063 61. There was a buffer overflow vulnerability in the SPA authentication code
6064 (which came originally from the Samba project). I have added a test to the
6065 spa_base64_to_bits() function which I hope fixes it.
6068 62. Configuration update for GNU/Hurd and variations. Updated Makefile-GNU and
6069 os.h-GNU, and added configuration files for GNUkFreeBSD and GNUkNetBSD.
6071 63. The daemon start-up calls getloadavg() while still root for those OS that
6072 need the first call to be done as root, but it missed one case: when
6073 deliver_queue_load_max is set with deliver_drop_privilege. This is
6074 necessary for the benefit of the queue runner, because there is no re-exec
6075 when deliver_drop_privilege is set.
6077 64. A call to exiwhat cut short delays set up by "delay" modifiers in ACLs.
6078 This has been fixed.
6080 65. Caching of lookup data for "hosts =" ACL conditions, when a named host list
6081 was in use, was not putting the data itself into the right store pool;
6082 consequently, it could be overwritten for a subsequent message in the same
6083 SMTP connection. (Fix 4.40/11 dealt with the non-cache case, but overlooked
6086 66. Added hosts_max_try_hardlimit to the smtp transport, default 50.
6088 67. The string_is_ip_address() function returns 0, 4, or 6, for "no an IP
6089 address", "IPv4 address", and "IPv6 address", respectively. Some calls of
6090 the function were treating the return as a boolean value, which happened to
6091 work because 0=false and not-0=true, but is not correct code.
6093 68. The host_aton() function was not handling scoped IPv6 addresses (those
6094 with, for example, "%eth0" on the end) correctly.
6096 69. Fixed some compiler warnings in acl.c for the bitmaps specified with
6097 negated items (that is, ~something) in unsigned ints. Some compilers
6098 apparently mutter when there is no cast.
6100 70. If an address verification called from an ACL failed, and did not produce a
6101 user-specific message (i.e. there was only a "system" message), nothing was
6102 put in $acl_verify_message. In this situation, it now puts the system
6105 71. Change 4.23/11 added synchronization checking at the start of an SMTP
6106 session; change 4.31/43 added the unwanted input to the log line - except
6107 that it did not do this in the start of session case. It now does.
6109 72. After a timeout in a callout SMTP session, Exim still sent a QUIT command.
6110 This is wrong and can cause the other end to generate a synchronization
6111 error if it is another Exim or anything else that does the synchronization
6112 check. A QUIT command is no longer sent after a timeout.
6114 73. $host_lookup_deferred has been added, to make it easier to detect DEFERs
6115 during host lookups.
6117 74. The defer_ok option of callout verification was not working if it was used
6118 when verifying addresses in header lines, that is, for this case:
6120 verify = header_sender/callout=defer_ok
6122 75. A backgrounded daemon closed stdin/stdout/stderr on entry; this meant that
6123 those file descriptors could be used for SMTP connections. If anything
6124 wrote to stderr (the example that came up was "warn" in embedded Perl), it
6125 could be sent to the SMTP client, causing chaos. The daemon now opens
6126 stdin, stdout, and stderr to /dev/null when it puts itself into the
6129 76. Arrange for output from Perl's "warn" command to be written to Exim's main
6130 log by default. The user can override this with suitable Perl magic.
6132 77. The use of log_message on a "discard" ACL verb, which is supposed to add to
6133 the log message when discard triggers, was not working for the DATA ACL or
6134 for the non-SMTP ACL.
6136 78. Error message wording change in sieve.c.
6138 79. If smtp_accept_max_per_host was set, the number of connections could be
6139 restricted to fewer than expected, because the daemon was trying to set up
6140 a new connection before checking whether the processes handling previous
6141 connections had finished. The check for completed processes is now done
6142 earlier. On busy systems, this bug wouldn't be noticed because something
6143 else would have woken the daemon, and it would have reaped the completed
6146 80. If a message was submitted locally by a user whose login name contained one
6147 or more spaces (ugh!), the spool file that Exim wrote was not re-readable.
6148 It caused a spool format error. I have fixed the spool reading code. A
6149 related problem was that the "from" clause in the Received: line became
6150 illegal because of the space(s). It is now covered by ${quote_local_part.
6152 81. Included the latest eximstats from Steve (adds average sizes to HTML Top
6155 82. Updated OS/Makefile-AIX as per message from Mike Meredith.
6157 83. Patch from Sieve maintainer to fix unterminated string problem in
6158 "vacation" handling.
6160 84. Some minor changes to the Linux configuration files to help with other
6161 OS variants using glibc.
6163 85. One more patch for Sieve to update vacation handling to latest spec.
6166 ----------------------------------------------------
6167 See the note above about the 4.44 and 4.50 releases.
6168 ----------------------------------------------------
6174 1. Change 4.43/35 introduced a bug that caused file counts to be
6175 incorrectly computed when quota_filecount was set in an appendfile
6178 2. Closing a stable door: arrange to panic-die if setitimer() ever fails. The
6179 bug fixed in 4.43/37 would have been diagnosed quickly if this had been in
6182 3. Give more explanation in the error message when the command for a transport
6183 filter fails to execute.
6185 4. There are several places where Exim runs a non-Exim command in a
6186 subprocess. The SIGUSR1 signal should be disabled for these processes. This
6187 was being done only for the command run by the queryprogram router. It is
6188 now done for all such subprocesses. The other cases are: ${run, transport
6189 filters, and the commands run by the lmtp and pipe transports.
6191 5. Some older OS have a limit of 256 on the maximum number of file
6192 descriptors. Exim was using setrlimit() to set 1000 as a large value
6193 unlikely to be exceeded. Change 4.43/17 caused a lot of logging on these
6194 systems. I've change it so that if it can't get 1000, it tries for 256.
6196 6. "control=submission" was allowed, but had no effect, in a DATA ACL. This
6197 was an oversight, and furthermore, ever since the addition of extra
6198 controls (e.g. 4.43/32), the checks on when to allow different forms of
6199 "control" were broken. There should now be diagnostics for all cases when a
6200 control that does not make sense is encountered.
6202 7. $recipients is now available in the predata ACL (oversight).
6204 8. Tidy the search cache before the fork to do a delivery from a message
6205 received from the command line. Otherwise the child will trigger a lookup
6206 failure and thereby defer the delivery if it tries to use (for example) a
6207 cached ldap connection that the parent has called unbind on.
6209 9. If verify=recipient was followed by verify=sender in a RCPT ACL, the value
6210 of $address_data from the recipient verification was clobbered by the
6211 sender verification.
6213 10. If FIXED_NEVER_USERS was defined, but empty, Exim was assuming the uid 0
6214 was its contents. (It was OK if the option was not defined at all.)
6216 11. A "Completed" log line is now written for messages that are removed from
6217 the spool by the -Mrm option.
6219 12. $host_address is now set to the target address during the checking of
6220 ignore_target_hosts.
6222 13. When checking ignore_target_hosts for an ipliteral router, no host name was
6223 being passed; this would have caused $sender_host_name to have been used if
6224 matching the list had actually called for a host name (not very likely,
6225 since this list is usually IP addresses). A host name is now passed as
6228 14. Changed the calls that set up the SIGCHLD handler in the daemon to use the
6229 code that specifies a non-restarting handler (typically sigaction() in
6230 modern systems) in an attempt to fix a rare and obscure crash bug.
6232 15. Narrowed the window for a race in the daemon that could cause it to ignore
6233 SIGCHLD signals. This is not a major problem, because they are used only to
6234 wake it up if nothing else does.
6236 16. A malformed maildirsize file could cause Exim to calculate negative values
6237 for the mailbox size or file count. Odd effects could occur as a result.
6238 The maildirsize information is now recalculated if the size or filecount
6241 17. Added HAVE_SYS_STATVFS_H to the os.h file for Linux, as it has had this
6242 support for a long time. Removed HAVE_SYS_VFS_H.
6244 18. Updated exipick to current release from John Jetmore.
6246 19. Allow an empty sender to be matched against a lookup in an address list.
6247 Previously the only cases considered were a regular expression, or an
6250 20. Exim went into a mad DNS lookup loop when doing a callout where the
6251 host was specified on the transport, if the DNS lookup yielded more than
6254 21. The RFC2047 encoding function was originally intended for short strings
6255 such as real names; it was not keeping to the 75-character limit for
6256 encoded words that the RFC imposes. It now respects the limit, and
6257 generates multiple encoded words if necessary. To be on the safe side, I
6258 have increased the buffer size for the ${rfc2047: expansion operator from
6261 22. Failure to deliver a bounce message always caused it to be frozen, even if
6262 there was an errors_to setting on the router. The errors_to setting is now
6265 23. If an IPv6 address is given for -bh or -bhc, it is now converted to the
6266 canonical form (fully expanded) before being placed in
6267 $sender_host_address.
6269 24. Updated eximstats to version 1.33
6271 25. Include certificate and key file names in error message when GnuTLS fails
6272 to set them up, because the GnuTLS error message doesn't include the name
6273 of the failing file when there is a problem reading it.
6275 26. Expand error message when OpenSSL has problems setting up cert/key files.
6278 27. Reset the locale to "C" after calling embedded Perl, in case it was changed
6279 (this can affect the format of dates).
6281 28. exim_tidydb, when checking for the continued existence of a message for
6282 which it has found a message-specific retry record, was not finding
6283 messages that were in split spool directories. Consequently, it was
6284 deleting retry records that should have stayed in existence.
6286 29. eximstats updated to version 1.35
6287 1.34 - allow eximstats to parse syslog lines as well as mainlog lines
6288 1.35 - bugfix such that pie charts by volume are generated correctly
6290 30. The SPA authentication driver was not abandoning authentication and moving
6291 on to the next authenticator when an expansion was forced to fail,
6292 contradicting the general specification for all authenticators. Instead it
6293 was generating a temporary error. It now behaves as specified.
6295 31. The default ordering of permitted cipher suites for GnuTLS was pessimal
6296 (the order specifies the preference for clients). The order is now AES256,
6297 AES128, 3DES, ARCFOUR128.
6299 31. Small patch to Sieve code - explicitly set From: when generating an
6302 32. Exim crashed if a remote delivery caused a very long error message to be
6303 recorded - for instance if somebody sent an entire SpamAssassin report back
6304 as a large number of 550 error lines. This bug was coincidentally fixed by
6305 increasing the size of one of Exim's internal buffers (big_buffer) that
6306 happened as part of the Exiscan merge. However, to be on the safe side, I
6307 have made the code more robust (and fixed the comments that describe what
6310 33. Some experimental protocols are using DNS PTR records for new purposes. The
6311 keys for these records are domain names, not reversed IP addresses. The
6312 dnsdb PTR lookup now tests whether its key is an IP address. If not, it
6313 leaves it alone. Component reversal etc. now happens only for IP addresses.
6316 34. The host_aton() function is supposed to be passed a string that is known
6317 to be a valid IP address. However, in the case of IPv6 addresses, it was
6318 not checking this. This is a hostage to fortune. Exim now panics and dies
6319 if the condition is not met. A case was found where this could be provoked
6320 from a dnsdb PTR lookup with an IPv6 address that had more than 8
6321 components; fortuitously, this particular loophole had already been fixed
6322 by change 4.50/55 or 4.44/33 above.
6324 If there are any other similar loopholes, the new check in host_aton()
6325 itself should stop them being exploited. The report I received stated that
6326 data on the command line could provoke the exploit when Exim was running as
6327 exim, but did not say which command line option was involved. All I could
6328 find was the use of -be with a bad dnsdb PTR lookup, and in that case it is
6329 running as the user.
6332 35. There was a buffer overflow vulnerability in the SPA authentication code
6333 (which came originally from the Samba project). I have added a test to the
6334 spa_base64_to_bits() function which I hope fixes it.
6337 36. The daemon start-up calls getloadavg() while still root for those OS that
6338 need the first call to be done as root, but it missed one case: when
6339 deliver_queue_load_max is set with deliver_drop_privilege. This is
6340 necessary for the benefit of the queue runner, because there is no re-exec
6341 when deliver_drop_privilege is set.
6343 37. Caching of lookup data for "hosts =" ACL conditions, when a named host list
6344 was in use, was not putting the data itself into the right store pool;
6345 consequently, it could be overwritten for a subsequent message in the same
6346 SMTP connection. (Fix 4.40/11 dealt with the non-cache case, but overlooked
6349 38. Sometimes the final signoff response after QUIT could fail to get
6350 transmitted in the non-TLS case. Testing !tls_active instead of tls_active
6351 < 0 before doing a fflush(). This bug looks as though it goes back to the
6352 introduction of TLS in release 3.20, but "sometimes" must have been rare
6353 because the tests only now provoked it.
6359 1. Fixed a longstanding but relatively impotent bug: a long time ago, before
6360 PIPELINING, the function smtp_write_command() used to return TRUE or FALSE.
6361 Now it returns an integer. A number of calls were still expecting a T/F
6362 return. Fortuitously, in all cases, the tests worked in OK situations,
6363 which is the norm. However, things would have gone wrong on any write
6364 failures on the smtp file descriptor. This function is used when sending
6365 messages over SMTP and also when doing verify callouts.
6367 2. When Exim is called to do synchronous delivery of a locally submitted
6368 message (the -odf or -odi options), it no longer closes stderr before doing
6371 3. Implemented the mua_wrapper option.
6373 4. Implemented mx_fail_domains and srv_fail_domains for the dnslookup router.
6375 5. Implemented the functions header_remove(), header_testname(),
6376 header_add_at_position(), and receive_remove_recipient(), and exported them
6379 6. If an ACL "warn" statement specified the addition of headers, Exim already
6380 inserted X-ACL-Warn: at the start if there was no header name. However, it
6381 was not making this test for the second and subsequent header lines if
6382 there were newlines in the string. This meant that an invalid header could
6383 be inserted if Exim was badly configured.
6385 7. Allow an ACL "warn" statement to add header lines at the start or after all
6386 the Received: headers, as well as at the end.
6388 8. Added the rcpt_4xx retry error code.
6390 9. Added postmaster_mailfrom=xxx to callout verification option.
6392 10. Added mailfrom=xxxx to the callout verification option, for verify=
6395 11. ${substr_1_:xxxx} and ${substr__3:xxxx} are now diagnosed as syntax errors
6396 (they previously behaved as ${substr_1_0:xxxx} and ${substr:_0_3:xxxx}).
6398 12. Inserted some casts to stop certain compilers warning when using pointer
6399 differences as field lengths or precisions in printf-type calls (mostly
6400 affecting debugging statements).
6402 13. Added optional readline() support for -be (dynamically loaded).
6404 14. Obscure bug fix: if a message error (e.g. 4xx to MAIL) happened within the
6405 same clock tick as a message's arrival, so that its received time was the
6406 same as the "first fail" time on the retry record, and that message
6407 remained on the queue past the ultimate address timeout, every queue runner
6408 would try a delivery (because it was past the ultimate address timeout) but
6409 after another failure, the ultimate address timeout, which should have then
6410 bounced the address, did not kick in. This was a "< instead of <=" error;
6411 in most cases the first failure would have been in the next clock tick
6412 after the received time, and all would be well.
6414 15. The special items beginning with @ in domain lists (e.g. @mx_any) were not
6415 being recognized when the domain list was tested by the match_domain
6416 condition in an expansion string.
6418 16. Added the ${str2b64: operator.
6420 17. Exim was always calling setrlimit() to set a large limit for the number of
6421 processes, without checking whether the existing limit was already
6422 adequate. (It did check for the limit on file descriptors.) Furthermore,
6423 errors from getrlimit() and setrlimit() were being ignored. Now they are
6424 logged to the main and panic logs, but Exim does carry on, to try to do its
6425 job under whatever limits there are.
6427 18. Imported PCRE 5.0.
6429 19. Trivial typo in log message " temporarily refused connection" (the leading
6432 20. If the log selector return_path_on_delivery was set and an address was
6433 redirected to /dev/null, the delivery process crashed because it assumed
6434 that a return path would always be set for a "successful" delivery. In this
6435 case, the whole delivery is bypassed as an optimization, and therefore no
6438 21. Internal re-arrangement: the function for sending a challenge and reading
6439 a response while authentication was assuming a zero-terminated challenge
6440 string. It's now changed to take a pointer and a length, to allow for
6441 binary data in such strings.
6443 22. Added the cyrus_sasl authenticator (code supplied by MBM).
6445 23. Exim was not respecting finduser_retries when seeking the login of the
6446 uid under which it was called; it was always trying 10 times. (The default
6447 setting of finduser_retries is zero.) Also, it was sleeping after the final
6448 failure, which is pointless.
6450 24. Implemented tls_on_connect_ports.
6452 25. Implemented acl_smtp_predata.
6454 26. If the domain in control=submission is set empty, Exim assumes that the
6455 authenticated id is a complete email address when it generates From: or
6456 Sender: header lines.
6458 27. Added "#define SOCKLEN_T int" to OS/os.h-SCO and OS/os.h-SCO_SV. Also added
6459 definitions to OS/Makefile-SCO and OS/Makefile-SCO_SV that put basename,
6460 chown and chgrp in /bin and hostname in /usr/bin.
6462 28. Exim was keeping the "process log" file open after each use, just as it
6463 does for the main log. This opens the possibility of it remaining open for
6464 long periods when the USR1 signal hits a daemon. Occasional processlog
6465 errors were reported, that could have been caused by this. Anyway, it seems
6466 much more sensible not to leave this file open at all, so that is what now
6469 29. The long-running daemon process does not normally write to the log once it
6470 has entered its main loop, and it closes the log before doing so. This is
6471 so that log files can straightforwardly be renamed and moved. However,
6472 there are a couple of unusual error situations where the daemon does write
6473 log entries, and I had neglected to close the log afterwards.
6475 30. The text of an SMTP error response that was received during a remote
6476 delivery was being truncated at 512 bytes. This is too short for some of
6477 the long messages that one sometimes sees. I've increased the limit to
6480 31. It is now possible to make retry rules that apply only when a message has a
6481 specific sender, in particular, an empty sender.
6483 32. Added "control = enforce_sync" and "control = no_enforce_sync". This makes
6484 it possible to be selective about when SMTP synchronization is enforced.
6486 33. Added "control = caseful_local_part" and "control = "caselower_local_part".
6488 32. Implemented hosts_connection_nolog.
6490 33. Added an ACL for QUIT.
6492 34. Setting "delay_warning=" to disable warnings was not working; it gave a
6495 35. Added mailbox_size and mailbox_filecount to appendfile.
6497 36. Added control = no_multiline_responses to ACLs.
6499 37. There was a bug in the logic of the code that waits for the clock to tick
6500 in the case where the clock went backwards by a substantial amount such
6501 that the microsecond fraction of "now" was more than the microsecond
6502 fraction of "then" (but the whole seconds number was less).
6504 38. Added support for the libradius Radius client library this is found on
6505 FreeBSD (previously only the radiusclient library was supported).
6511 1. When certain lookups returned multiple values in the form name=value, the
6512 quoting of the values was not always being done properly. Specifically:
6513 (a) If the value started with a double quote, but contained no whitespace,
6515 (b) If the value contained whitespace other than a space character (i.e.
6516 tabs or newlines or carriage returns) it was not quoted.
6517 This fix has been applied to the mysql and pgsql lookups by writing a
6518 separate quoting function and calling it from the lookup code. The fix
6519 should probably also be applied to nisplus, ibase and oracle lookups, but
6520 since I cannot test any of those, I have not disturbed their existing code.
6522 2. A hit in the callout cache for a specific address caused a log line with no
6523 reason for rejecting RCPT. Now it says "Previous (cached) callout
6524 verification failure".
6526 3. There was an off-by-one bug in the queryprogram router. An over-long
6527 return line was truncated at 256 instead of 255 characters, thereby
6528 overflowing its buffer with the terminating zero. As well as fixing this, I
6529 have increased the buffer size to 1024 (and made a note to document this).
6531 4. If an interrupt, such as the USR1 signal that is send by exiwhat, arrives
6532 when Exim is waiting for an SMTP response from a remote server, Exim
6533 restarts its select() call on the socket, thereby resetting its timeout.
6534 This is not a problem when such interrupts are rare. Somebody set up a cron
6535 job to run exiwhat every 2 minutes, which is less than the normal select()
6536 timeout (5 or 10 minutes). This meant that the select() timeout never
6537 kicked in because it was always reset. I have fixed this by comparing the
6538 time when an interrupt arrives with the time at the start of the first call
6539 to select(). If more time than the timeout has elapsed, the interrupt is
6540 treated as a timeout.
6542 5. Some internal re-factoring in preparation for the addition of Sieve
6543 extensions (by MH). In particular, the "personal" test is moved to a
6544 separate function, and given an option for scanning Cc: and Bcc: (which is
6545 not set for Exim filters).
6547 6. When Exim created an email address using the login of the caller as the
6548 local part (e.g. when creating a From: or Sender: header line), it was not
6549 quoting the local part when it contained special characters such as @.
6551 7. Installed new OpenBSD configuration files.
6553 8. Reworded some messages for syntax errors in "and" and "or" conditions to
6554 try to make them clearer.
6556 9. Callout options, other than the timeout value, were being ignored when
6557 verifying sender addresses in header lines. For example, when using
6559 verify = header_sender/callout=no_cache
6561 the cache was (incorrectly) being used.
6563 10. Added a missing instance of ${EXE} to the exim_install script; this affects
6564 only the Cygwin environment.
6566 11. When return_path_on_delivery was set as a log selector, if different remote
6567 addresses in the same message used different return paths and parallel
6568 remote delivery occurred, the wrong values would sometimes be logged.
6569 (Whenever a remote delivery process finished, the return path value from
6570 the most recently started remote delivery process was logged.)
6572 12. RFC 3848 specifies standard names for the "with" phrase in Received: header
6573 lines when AUTH and/or TLS are in use. This is the "received protocol"
6574 field. Exim used to use "asmtp" for authenticated SMTP, without any
6575 indication (in the protocol name) for TLS use. Now it follows the RFC and
6576 uses "esmtpa" if the connection is authenticated, "esmtps" if it is
6577 encrypted, and "esmtpsa" if it is both encrypted and authenticated. These
6578 names appear in log lines as well as in Received: header lines.
6580 13. Installed MH's patches for Sieve to add the "copy" and "vacation"
6581 extensions, and comparison tests, and to fix some bugs.
6583 14. Changes to the "personal" filter test:
6585 (1) The test was buggy in that it was just doing the equivalent of
6586 "contains" tests on header lines. For example, if a user's address was
6587 anne@some.where, the "personal" test would incorrectly be true for
6589 To: susanne@some.where
6591 This test is now done by extracting each address from the header in turn,
6592 and checking the entire address. Other tests that are part of "personal"
6593 are now done using regular expressions (for example, to check local parts
6594 of addresses in From: header lines).
6596 (2) The list of non-personal local parts in From: addresses has been
6597 extended to include "listserv", "majordomo", "*-request", and "owner-*",
6598 taken from the Sieve specification recommendations.
6600 (3) If the message contains any header line starting with "List-" it is
6601 treated as non-personal.
6603 (4) The test for "circular" in the Subject: header line has been removed
6604 because it now seems ill-conceived.
6606 15. Minor typos in src/EDITME comments corrected.
6608 16. Installed latest exipick from John Jetmore.
6610 17. If headers_add on a router specified a text string that was too long for
6611 string_sprintf() - that is, longer than 8192 bytes - Exim panicked. The use
6612 of string_sprintf() is now avoided.
6614 18. $message_body_size was not set (it was always zero) when running the DATA
6615 ACL and the local_scan() function.
6617 19. For the "mail" command in an Exim filter, no default was being set for
6618 the once_repeat time, causing a random time value to be used if "once" was
6619 specified. (If the value happened to be <= 0, no repeat happened.) The
6620 default is now 0s, meaning "never repeat". The "vacation" command was OK
6621 (its default is 7d). It's somewhat surprising nobody ever noticed this bug
6622 (I found it when inspecting the code).
6624 20. There is now an overall timeout for performing a callout verification. It
6625 defaults to 4 times the callout timeout, which applies to individual SMTP
6626 commands during the callout. The overall timeout applies when there is more
6627 than one host that can be tried. The timeout is checked before trying the
6628 next host. This prevents very long delays if there are a large number of
6629 hosts and all are timing out (e.g. when the network connections are timing
6630 out). The value of the overall timeout can be changed by specifying an
6631 additional sub-option for "callout", called "maxwait". For example:
6633 verify = sender/callout=5s,maxwait=20s
6635 21. Add O_APPEND to the open() call for maildirsize files (Exim already seeks
6636 to the end before writing, but this should make it even safer).
6638 22. Exim was forgetting that it had advertised PIPELINING for the second and
6639 subsequent messages on an SMTP connection. It was also not resetting its
6640 memory on STARTTLS and an internal HELO.
6642 23. When Exim logs an SMTP synchronization error within a session, it now
6643 records whether PIPELINING has been advertised or not.
6645 24. Added 3 instances of "(long int)" casts to time_t variables that were being
6646 formatted using %ld, because on OpenBSD (and perhaps others), time_t is int
6647 rather than long int.
6649 25. Installed the latest Cygwin configuration files from the Cygwin maintainer.
6651 26. Added the never_mail option to autoreply.
6657 1. A reorganization of the code in order to implement 4.40/8 caused a daemon
6658 crash if the getsockname() call failed; this can happen if a connection is
6659 closed very soon after it is established. The problem was simply in the
6660 order in which certain operations were done, causing Exim to try to write
6661 to the SMTP stream before it had set up the file descriptor. The bug has
6662 been fixed by making things happen in the correct order.
6668 1. If "drop" was used in a DATA ACL, the SMTP output buffer was not flushed
6669 before the connection was closed, thus losing the rejection response.
6671 2. Commented out the definition of SOCKLEN_T in os.h-SunOS5. It is needed for
6672 some early Solaris releases, but causes trouble in current releases where
6673 socklen_t is defined.
6675 3. When std{in,out,err} are closed, re-open them to /dev/null so that they
6678 4. Minor refactoring of os.c-Linux to avoid compiler warning when IPv6 is not
6681 5. Refactoring in expand.c to improve memory usage. Pre-allocate a block so
6682 that releasing the top of it at the end releases what was used for sub-
6683 expansions (unless the block got too big). However, discard this block if
6684 the first thing is a variable or header, so that we can use its block when
6685 it is dynamic (useful for very large $message_headers, for example).
6687 6. Lookups now cache *every* query, not just the most recent. A new, separate
6688 store pool is used for this. It can be recovered when all lookup caches are
6689 flushed. Lookups now release memory at the end of their result strings.
6690 This has involved some general refactoring of the lookup sources.
6692 7. Some code has been added to the store_xxx() functions to reduce the amount
6693 of flapping under certain conditions.
6695 8. log_incoming_interface used to affect only the <= reception log lines. Now
6696 it causes the local interface and port to be added to several more SMTP log
6697 lines, for example "SMTP connection from", and rejection lines.
6699 9. The Sieve author supplied some patches for the doc/README.SIEVE file.
6701 10. Added a conditional definition of _BSD_SOCKLEN_T to os.h-Darwin.
6703 11. If $host_data was set by virtue of a hosts lookup in an ACL, its value
6704 could be overwritten at the end of the current message (or the start of a
6705 new message if it was set in a HELO ACL). The value is now preserved for
6706 the duration of the SMTP connection.
6708 12. If a transport had a headers_rewrite setting, and a matching header line
6709 contained an unqualified address, that address was qualified, even if it
6710 did not match any rewriting rules. The underlying bug was that the values
6711 of the flags that permit the existence of unqualified sender and recipient
6712 addresses in header lines (set by {sender,recipient}_unqualified_hosts for
6713 non-local messages, and by -bnq for local messages) were not being
6714 preserved with the message after it was received.
6716 13. When Exim was logging an SMTP synchronization error, it could sometimes log
6717 "next input=" as part of the text comprising the host identity instead of
6718 the correct text. The code was using the same buffer for two different
6719 strings. However, depending on which order the printing function evaluated
6720 its arguments, the bug did not always show up. Under Linux, for example, my
6721 test suite worked just fine.
6723 14. Exigrep contained a use of Perl's "our" scoping after change 4.31/70. This
6724 doesn't work with some older versions of Perl. It has been changed to "my",
6725 which in any case is probably the better facility to use.
6727 15. A really picky compiler found some instances of statements for creating
6728 error messages that either had too many or two few arguments for the format
6731 16. The size of the buffer for calls to the DNS resolver has been increased
6732 from 1024 to 2048. A larger buffer is needed when performing PTR lookups
6733 for addresses that have a lot of PTR records. This alleviates a problem; it
6734 does not fully solve it.
6736 17. A dnsdb lookup for PTR records that receives more data than will fit in the
6737 buffer now truncates the list and logs the incident, which is the same
6738 action as happens when Exim is looking up a host name and its aliases.
6739 Previously in this situation something unpredictable would happen;
6740 sometimes it was "internal error: store_reset failed".
6742 18. If a server dropped the connection unexpectedly when an Exim client was
6743 using GnuTLS and trying to read a response, the client delivery process
6744 crashed while trying to generate an error log message.
6746 19. If a "warn" verb in an ACL added multiple headers to a message in a single
6747 string, for example:
6749 warn message = H1: something\nH2: something
6751 the text was added as a single header line from Exim's point of view
6752 though it ended up OK in the delivered message. However, searching for the
6753 second and subsequent header lines using $h_h2: did not work. This has been
6754 fixed. Similarly, if a system filter added multiple headers in this way,
6755 the routers could not see them.
6757 20. Expanded the error message when iplsearch is called with an invalid key to
6758 suggest using net-iplsearch in a host list.
6760 21. When running tests using -bh, any delays imposed by "delay" modifiers in
6761 ACLs are no longer actually imposed (and a message to that effect is
6764 22. If a "gecos" field in a passwd entry contained escaped characters, in
6765 particular, if it contained a \" sequence, Exim got it wrong when building
6766 a From: or a Sender: header from that name. A second bug also caused
6767 incorrect handling when an unquoted " was present following a character
6768 that needed quoting.
6770 23. "{crypt}" as a password encryption mechanism for a "crypteq" expansion item
6771 was not being matched caselessly.
6773 24. Arranged for all hyphens in the exim.8 source to be escaped with
6776 25. Change 16 of 4.32, which reversed 71 or 4.31 didn't quite do the job
6777 properly. Recipient callout cache records were still being keyed to include
6778 the sender, even when use_sender was set false. This led to far more
6779 callouts that were necessary. The sender is no longer included in the key
6780 when use_sender is false.
6782 26. Added "control = submission" modifier to ACLs.
6784 27. Added the ${base62d: operator to decode base 62 numbers.
6786 28. dnsdb lookups can now access SRV records.
6788 29. CONFIGURE_OWNER can be set at build time to define an alternative owner for
6789 the configuration file.
6791 30. The debug message "delivering xxxxxx-xxxxxx-xx" is now output in verbose
6792 (-v) mode. This makes the output for a verbose queue run more intelligible.
6794 31. Added a use_postmaster feature to recipient callouts.
6796 32. Added the $body_zerocount variable, containing the number of binary zero
6797 bytes in the message body.
6799 33. The time of last modification of the "new" subdirectory is now used as the
6800 "mailbox time last read" when there is a quota error for a maildir
6803 34. Added string comparison operators lt, lti, le, lei, gt, gti, ge, gei.
6805 35. Added +ignore_unknown as a special item in host lists.
6807 36. Code for decoding IPv6 addresses in host lists is now included, even if
6808 IPv6 support is not being compiled. This fixes a bug in which an IPv6
6809 address was recognized as an IP address, but was then not correctly decoded
6810 into binary, causing unexpected and incorrect effects when compared with
6817 1. Very minor rewording of debugging text in manualroute to say "list of
6818 hosts" instead of "hostlist".
6820 2. If verify=header_syntax was set, and a header line with an unqualified
6821 address (no domain) and a large number of spaces between the end of the
6822 name and the colon was received, the reception process suffered a buffer
6823 overflow, and (when I tested it) crashed. This was caused by some obsolete
6824 code that should have been removed. The fix is to remove it!
6826 3. When running in the test harness, delay a bit after writing a bounce
6827 message to get a bit more predictability in the log output.
6829 4. Added a call to search_tidyup() just before forking a reception process. In
6830 theory, someone could use a lookup in the expansion of smtp_accept_max_
6831 per_host which, without the tidyup, could leave open a database connection.
6833 5. Added the variables $recipient_data and $sender_data which get set from a
6834 lookup success in an ACL "recipients" or "senders" condition, or a router
6835 "senders" option, similar to $domain_data and $local_part_data.
6837 6. Moved the writing of debug_print from before to after the "senders" test
6840 7. Change 4.31/66 (moving the time when the Received: is generated) caused
6841 problems for message scanning, either using a data ACL, or using
6842 local_scan() because the Received: header was not generated till after they
6843 were called (in order to set the time as the time of reception completion).
6844 I have revised the way this works. The header is now generated after the
6845 body is received, but before the ACL or local_scan() are called. After they
6846 are run, the timestamp in the header is updated.
6852 1. Change 4.24/6 introduced a bug because the SIGALRM handler was disabled
6853 before starting a queue runner without re-exec. This happened only when
6854 deliver_drop_privilege was set or when the Exim user was set to root. The
6855 effect of the bug was that timeouts during subsequent deliveries caused
6856 crashes instead of being properly handled. The handler is now left at its
6857 default (and expected) setting.
6859 2. The other case in which a daemon avoids a re-exec is to deliver an incoming
6860 message, again when deliver_drop_privilege is set or Exim is run as root.
6861 The bug described in (1) was not present in this case, but the tidying up
6862 of the other signals was missing. I have made the two cases consistent.
6864 3. The ignore_target_hosts setting on a manualroute router was being ignored
6865 for hosts that were looked up using the /MX notation.
6867 4. Added /ignore=<ip list> feature to @mx_any, @mx_primary, and @mx_secondary
6870 5. Change 4.31/55 was buggy, and broke when there was a rewriting rule that
6871 operated on the sender address. After changing the $sender_address to <>
6872 for the sender address verify, Exim was re-instated it as the original
6873 (before rewriting) address, but remembering that it had rewritten it, so it
6874 wasn't rewriting it again. This bug also had the effect of breaking the
6875 sender address verification caching when the sender address was rewritten.
6877 6. The ignore_target_hosts option was being ignored by the ipliteral router.
6878 This has been changed so that if the ip literal address matches
6879 ignore_target_hosts, the router declines.
6881 7. Added expansion conditions match_domain, match_address, and match_local_
6882 part (NOT match_host).
6884 8. The placeholder for the Received: header didn't have a length field set.
6886 9. Added code to Exim itself and to exim_lock to test for a specific race
6887 condition that could lead to file corruption when using MBX delivery. The
6888 issue is with the lockfile that is created in /tmp. If this file is removed
6889 after a process has opened it but before that process has acquired a lock,
6890 there is the potential for a second process to recreate the file and also
6891 acquire a lock. This could lead to two Exim processes writing to the file
6892 at the same time. The added code performs the same test as UW imapd; it
6893 checks after acquiring the lock that its file descriptor still refers to
6894 the same named file.
6896 10. The buffer for building added header lines was of fixed size, 8192 bytes.
6897 It is now parameterized by HEADER_ADD_BUFFER_SIZE and this can be adjusted
6900 11. Added the smtp_active_hostname option. If used, this will typically be made
6901 to depend on the incoming interface address. Because $interface_address is
6902 not set up until the daemon has forked a reception process, error responses
6903 that can happen earlier (such as "too many connections") no longer contain
6906 12. If an expansion in a condition on a "warn" statement fails because a lookup
6907 defers, the "warn" statement is abandoned, and the next ACL statement is
6908 processed. Previously this caused the whole ACL to be aborted.
6910 13. Added the iplsearch lookup type.
6912 14. Added ident_timeout as a log selector.
6914 15. Added tls_certificate_verified as a log selector.
6916 16. Added a global option tls_require_ciphers (compare the smtp transport
6917 option of the same name). This controls incoming TLS connections.
6919 17. I finally figured out how to make tls_require_ciphers do a similar thing
6920 in GNUtls to what it does in OpenSSL, that is, set up an appropriate list
6921 before starting the TLS session.
6923 18. Tabs are now shown as \t in -bP output.
6925 19. If the log selector return_path_on_delivery was set, Exim crashed when
6926 bouncing a message because it had too many Received: header lines.
6928 20. If two routers both had headers_remove settings, and the first one included
6929 a superfluous trailing colon, the final name in the first list and the
6930 first name in the second list were incorrectly joined into one item (with a
6931 colon in the middle).
6937 1. Added -C and -D options to the exinext utility, mainly to make it easier
6938 to include in the automated testing, but these could be helpful when
6939 multiple configurations are in use.
6941 2. The exinext utility was not formatting the output nicely when there was
6942 an alternate port involved in the retry record key, nor when there was a
6943 message id as well (for retries that were specific to a specific message
6944 and a specific host). It was also confused by IPv6 addresses, because of
6945 the additional colons they contain. I have fixed the IPv4 problem, and
6946 patched it up to do a reasonable job for IPv6.
6948 3. When there is an error after a MAIL, RCPT, or DATA SMTP command during
6949 delivery, the log line now contains "pipelined" if PIPELINING was used.
6951 4. An SMTP transport process used to panic and die if the bind() call to set
6952 an explicit outgoing interface failed. This has been changed; it is now
6953 treated in the same way as a connect() failure.
6955 5. A reference to $sender_host_name in the part of a conditional expansion
6956 that was being skipped was still causing a DNS lookup. This no longer
6959 6. The def: expansion condition was not recognizing references to header lines
6960 that used bh_ and bheader_.
6962 7. Added the _cache feature to named lists.
6964 8. The code for checking quota_filecount in the appendfile transport was
6965 allowing one more file than it should have been.
6967 9. For compatibility with Sendmail, the command line option
6975 and sets the incoming protocol and host name (for trusted callers). The
6976 host name and its colon can be omitted when only the protocol is to be set.
6977 Note the Exim already has two private options, -pd and -ps, that refer to
6978 embedded Perl. It is therefore impossible to set a protocol value of "d" or
6979 "s", but I don't think that's a major issue.
6981 10. A number of refactoring changes to the code, none of which should affect
6984 (a) The number of logging options was getting close to filling up the
6985 32-bit word that was used as a bit map. I have split them into two classes:
6986 those that are passed in the argument to log_write(), and those that are
6987 only ever tested independently outside of that function. These are now in
6988 separate 32-bit words, so there is plenty of room for expansion again.
6989 There is no change in the user interface or the logging behaviour.
6991 (b) When building, for example, log lines, the code previously used a
6992 macro that called string_cat() twice, in order to add two strings. This is
6993 not really sufficiently general. Furthermore, there was one instance where
6994 it was actually wrong because one of the argument was used twice, and in
6995 one call a function was used. (As it happened, calling the function twice
6996 did not affect the overall behaviour.) The macro has been replaced by a
6997 function that can join an arbitrary number of extra strings onto a growing
7000 (c) The code for expansion conditions now uses a table and a binary chop
7001 instead of a serial search (which was left over from when there were very
7002 few conditions). Also, it now recognizes conditions like "pam" even when
7003 the relevant support is not compiled in: a suitably worded error message is
7004 given if an attempt is made to use such a condition.
7006 11. Added ${time_interval:xxxxx}.
7008 12. A bug was causing one of the ddress fields not to be passed back correctly
7009 from remote delivery subprocesses. The field in question was not being
7010 subsequently used, so this caused to problems in practice.
7012 13. Added new log selectors queue_time and deliver_time.
7014 14. Might have fixed a bug in maildirsizefile handling that threw up
7015 "unexpected character" debug warnings, and recalculated the data
7016 unnecessarily. In any case, I expanded the warning message to give more
7019 15. Added the message "Restricted characters in address" to the statements in
7020 the default ACL that block characters like @ and % in local parts.
7022 16. Change 71 for release 4.31 proved to be much less benign that I imagined.
7023 Three changes have been made:
7025 (a) There was a serious bug; a negative response to MAIL caused the whole
7026 recipient domain to be cached as invalid, thereby blocking all messages
7027 to all local parts at the same domain, from all senders. This bug has
7028 been fixed. The domain is no longer cached after a negative response to
7029 MAIL if the sender used is not empty.
7031 (b) The default behaviour of using MAIL FROM:<> for recipient callouts has
7034 (c) A new callout option, "use_sender" has been added for people who want
7035 the modified behaviour.
7041 1. Removed "EXTRALIBS=-lwrap" from OS/Makefile-Unixware7 on the advice of
7044 2. Removed "LIBS = -lresolv" from OS/Makefile-Darwin as it is not needed, and
7045 indeed breaks things for older releases.
7047 3. Added additional logging to the case where there is a problem reading data
7048 from a filter that is running in a subprocess using a pipe, in order to
7049 try to track down a specific problem.
7051 4. Testing facility fudge: when running in the test harness and attempting
7052 to connect to 10.x.x.x (expecting a connection timeout) I'm now sometimes
7053 getting "No route to host". Convert this to a timeout.
7055 5. Define ICONV_ARG2_TYPE as "char **" for Unixware7 to avoid compiler
7058 6. Some OS don't have socklen_t but use size_t instead. This affects the
7059 fifth argument of getsockopt() amongst other things. This is now
7060 configurable by a macro called SOCKLEN_T which defaults to socklen_t, but
7061 can be set for individual OS. I have set it for SunOS5, OSF1, and
7062 Unixware7. Current versions of SunOS5 (aka Solaris) do have socklen_t, but
7063 some earlier ones do not.
7065 7. Change 4.30/15 was not doing the test caselessly.
7067 8. The standard form for an IPv6 address literal was being rejected by address
7068 parsing in, for example, MAIL and RCPT commands. An example of this kind of
7069 address is [IPv6:2002:c1ed:8229:10:202:2dff:fe07:a42a]. Exim now accepts
7070 this, as well as the form without the "IPv6" on the front (but only when
7071 address literals are enabled, of course).
7073 9. Added some casts to avoid compiler warnings in OS/os.c-Linux.
7075 10. Exim crashed if a message with an empty sender address specified by -f
7076 encountered a router with an errors_to setting. This could be provoked only
7077 by a command such as
7081 where an empty string was supplied; "<>" did not hit this bug.
7083 11. Installed PCRE release 4.5.
7085 12. If EHLO/HELO was rejected by an ACL, the value of $sender_helo_name
7086 remained set. It is now erased.
7088 13. exiqgrep wasn't working on MacOS X because it didn't correctly compute
7089 times from message ids (which are base 36 rather than the normal 62).
7091 14. "Expected" SMTP protocol errors that can arise when PIPELINING is in use
7092 were being counted as actual protocol errors, and logged if the log
7093 selector +smtp_protocol_error was set. One cannot be perfect in this test,
7094 but now, if PIPELINING has been advertised, RCPT following a rejected MAIL,
7095 and DATA following a set of rejected RCPTs do not count as protocol errors.
7096 In other words, Exim assumes they were pipelined, though this may not
7097 actually be the case. Of course, in all cases the client gets an
7098 appropriate error code.
7100 15. If a lookup fails in an ACL condition, a message about the failure may
7101 be available; it is used if testing the ACL cannot continue, because most
7102 such messages specify what the cause of the deferral is. However, some
7103 messages (e.g. "MYSQL: no data found") do not cause a defer. There was bug
7104 that caused an old message to be retained and used if a later statement
7105 caused a defer, replacing the real cause of the deferral.
7107 16. If an IP address had so many PTR records that the DNS lookup buffer
7108 was not large enough to hold them, Exim could crash while trying to process
7109 the truncated data. It now detects and logs this case.
7111 17. Further to 4.21/58, another change has been made: if (and only if) the
7112 first line of a message (the first header line) ends with CRLF, a bare LF
7113 in a subsequent header line has a space inserted after it, so as not to
7114 terminate the header.
7116 18. Refactoring: tidied an ugly bit of code in appendfile that copied data
7117 unnecessarily, used atoi() instead of strtol(), and didn't check the
7118 termination when getting file sizes from file names by regex.
7120 19. Completely re-implemented the support for maildirsize files, in the light
7121 of a number of problems with the previous contributed implementation
7122 (4.30/29). In particular:
7124 . If the quota is zero, the maildirsize file is maintained, but no quota is
7127 . If the maildir directory does not exist, it is created before any attempt
7128 to write a maildirsize file.
7130 . The quota value in the file is just a cache; if the quota is changed in
7131 the transport, the new value overrides.
7133 . A regular expression is available for excluding directories from the
7136 20. The autoreply transport checks the characters in options that define the
7137 message's headers; it allows continued headers, but it was checking with
7138 isspace() after an embedded newline instead of explicitly looking for a
7141 21. If all the "regular" hosts to which an address was routed had passed their
7142 expiry times, and had not reached their retry times, the address was
7143 bounced, even if fallback hosts were defined. Now Exim should go on to try
7146 22. Increased buffer sizes in the callout code from 1024 to 4096 to match the
7147 equivalent code in the SMTP transport. Some hosts send humungous responses
7148 to HELO/EHLO, more than 1024 it seems.
7150 23. Refactoring: code in filter.c used (void *) for "any old type" but this
7151 gives compiler warnings in some environments. I've now done it "properly",
7154 24. The replacement for inet_ntoa() that is used with gcc on IRIX systems
7155 (because of problems with the built-in one) was declared to return uschar *
7156 instead of char *, causing compiler failure.
7158 25. Fixed a file descriptor leak when processing alias/forward files.
7160 26. Fixed a minor format string issue in dbfn.c.
7162 27. Typo in exim.c: ("dmbnz" for "dbmnz").
7164 28. If a filter file refered to $h_xxx or $message_headers, and the headers
7165 contained RFC 2047 "words", Exim's memory could, under certain conditions,
7168 29. When a sender address is verified, it is cached, to save repeating the test
7169 when there is more than one recipient in a message. However, when the
7170 verification involves a callout, it is possible for different callout
7171 options to be set for different recipients. It is too complicated to keep
7172 track of this in the cache, so now Exim always runs a verification when a
7173 callout is required, relying on the callout cache for the optimization.
7174 The overhead is duplication of the address routing, but this should not be
7177 30. Fixed a bug in callout caching. If a RCPT command caused the sender address
7178 to be verified with callout=postmaster, and the main callout worked but the
7179 postmaster check failed, the verification correctly failed. However, if a
7180 subsequent RCPT command asked for sender verification *without* the
7181 postmaster check, incorrect caching caused this verification also to fail,
7184 31. Exim caches DNS lookup failures so as to avoid multiple timeouts; however,
7185 it was not caching the DNS options (qualify_single, search_parents) that
7186 were used when the lookup failed. A subsequent lookup with different
7187 options therefore always gave the same answer, though there were cases
7188 where it should not have. (Example: a "domains = !$mx_any" option on a
7189 dnslookup router: the "domains" option is always processed without any
7190 widening, but the router might have qualify_single set.) Now Exim uses the
7191 cached value only when the same options are set.
7193 32. Added John Jetmore's "exipick" utility to the distribution.
7195 33. GnuTLS: When an attempt to start a TLS session fails for any reason other
7196 than a timeout (e.g. a certificate is required, and is not provided), an
7197 Exim server now closes the connection immediately. Previously it waited for
7198 the client to close - but if the client is SSL, it seems that they each
7199 wait for each other, leading to a delay before one of them times out.
7201 34: GnuTLS: Updated the code to use the new GnuTLS 1.0.0 API. I have not
7202 maintained 0.8.x compatibility because I don't think many are using it, and
7203 it is clearly obsolete.
7205 35. Added TLS support for CRLs: a tls_crl global option and one for the smtp
7208 36. OpenSSL: $tls_certificate_verified was being set to 1 even if the
7209 client certificate was expired. A simple patch fixes this, though I don't
7210 understand the full logic of why the verify callback is called multiple
7213 37. OpenSSL: a patch from Robert Roselius: "Enable client-bug workaround.
7214 Versions of OpenSSL as of 0.9.6d include a 'CBC countermeasure' feature,
7215 which causes problems with some clients (such as the Certicom SSL Plus
7216 library used by Eudora). This option, SSL_OP_DONT_INSERT_EMPTY_FRAGMENTS,
7217 disables the coutermeasure allowing Eudora to connect."
7219 38. Exim was not checking that a write() to a log file succeeded. This could
7220 lead to Bad Things if a log got too big, in particular if it hit a file
7221 size limit. Exim now panics and dies if it cannot write to a log file, just
7222 as it does if it cannot open a log file.
7224 39. Modified OS/Makefile-Linux so that it now contains
7226 CFLAGS=-O -D_FILE_OFFSET_BITS=64 -D_LARGEFILE_SOURCE
7228 The two -D definitions ensure that Exim is compiled with large file
7229 support, which makes it possible to handle log files that are bigger than
7232 40. Fixed a subtle caching bug: if (in an ACL or a set of routers, for
7233 instance) a domain was checked against a named list that involved a lookup,
7234 causing $domain_data to be set, then another domain was checked against the
7235 same list, then the first domain was re-checked, the value of $domain_data
7236 after the final check could be wrong. In particular, if the second check
7237 failed, it could be set empty. This bug probably also applied to
7240 41. The strip_trailing_dot option was not being applied to the address given
7241 with the -f command-line option.
7243 42. The code for reading a message's header from the spool was incrementing
7244 $received_count, but never initializing it. This meant that the value was
7245 incorrect (doubled) while delivering a message in the same process in which
7246 it was received. In the most common configuration of Exim, this never
7247 happens - a fresh exec is done - but it can happen when
7248 deliver_drop_privilege is set.
7250 43. When Exim logs an SMTP synchronization error - client data sent too soon -
7251 it now includes up to 150 characters of the unexpected data in the log
7254 44. The exim_dbmbuild utility uses fixed size buffers for reading input lines
7255 and building data strings. The size of both of these buffers was 10 000
7256 bytes - far larger than anybody would *ever* want, thought I. Needless to
7257 say, somebody hit the limit. I have increased the maximum line length to
7258 20 000 and the maximum data length of concatenated lines to 100 000. I have
7259 also fixed two bugs, because there was no checking on these buffers. Tsk,
7260 tsk. Now exim_dbmbuild gives a message and exits with an error code if a
7261 buffer is too small.
7263 45. The exim_dbmbuild utility did not support quoted keys, as Exim does in
7264 lsearch lookups. Now it does.
7266 46. When parsing a route_list item in a manualroute router, a fixed-length
7267 buffer was used for the list of hosts. I made this 1024 bytes long,
7268 thinking that nobody would ever have a list of hosts that long. Wrong.
7269 Somebody had a whole pile of complicated expansion conditions, and the
7270 string was silently truncated, leading to an expansion error. It turns out
7271 that it is easier to change to an unlimited length (owing to other changes
7272 that have happened since this code was originally written) than to build
7273 structure for giving a limitation error. The length of the item that
7274 expands into the list of hosts is now unlimited.
7276 47. The lsearch lookup could not handle data where the length of text line was
7277 more than 4095 characters. Such lines were truncated, leading to shortened
7278 data being returned. It should now handle lines of any length.
7280 48. Minor wording revision: "cannot test xxx in yyy ACL" becomes "cannot test
7281 xxx condition in yyy ACL" (e.g. "cannot test domains condition in DATA
7284 49. Cosmetic tidy to scripts like exicyclog that are generated by globally
7285 replacing strings such as BIN_DIRECTORY in a source file: the replacement
7286 no longer happens in comment lines. A list of replacements is now placed
7287 at the head of all of the source files, except those whose only change is
7288 to replace PERL_COMMAND in the very first #! line.
7290 50. Replaced the slow insertion sort in queue.c, for sorting the list of
7291 messages on the queue, with a bottom-up merge sort, using code contributed
7292 by Michael Haardt. This should make operations like -bp somewhat faster on
7293 large queues. It won't affect queue runners, except when queue_run_in_order
7296 51. Installed eximstats 1.31 in the distribution.
7298 52. Added support for SRV lookups to the dnslookup router.
7300 53. If an ACL referred to $message_body or $message_body_end, the value was not
7301 reset for any messages that followed in the same SMTP session.
7303 54. The store-handling optimization for building very long strings was not
7304 differentiating between the different store pools. I don't think this
7305 actually made any difference in practice, but I've tidied it.
7307 55. While running the routers to verify a sender address, $sender_address
7308 was still set to the sender address. This is wrong, because when routing to
7309 send a bounce to the sender, it would be empty. Therefore, I have changed
7310 it so that, while verifying a sender address, $sender_address is set to <>.
7311 (There is no change to what happens when verifying a recipient address.)
7313 56. After finding MX (or SRV) records, Exim was doing a DNS lookup for the
7314 target A or AAAA records (if not already returned) without resetting the
7315 qualify_single or search_parents options of the DNS resolver. These are
7316 inappropriate in this case because the targets of MX and SRV records must
7317 be FQDNs. A broken DNS record could cause trouble if it happened to have a
7318 target that, when qualified, matched something in the local domain. These
7319 two options are now turned off when doing these lookups.
7321 57. It seems that at least some releases of Reiserfs (which does not have the
7322 concept of a fixed number of inodes) returns zero and not -1 for the
7323 number of available inodes. This interacted badly with check_spool_inodes,
7324 which assumed that -1 was the "no such thing" setting. What I have done is
7325 to check that the total number of inodes is greater than zero before doing
7326 the test of how many are available.
7328 58. When a "warn" ACL statement has a log_message modifier, the message is
7329 remembered, and not repeated. This is to avoid a lot of repetition when a
7330 message has many recipients that cause the same warning to be written.
7331 However, Exim was preserving the list of already written lines for an
7332 entire SMTP session, which doesn't seem right. The memory is now reset if a
7333 new message is started.
7335 59. The "rewrite" debugging flag was not showing the result of rewriting in the
7336 debugging output unless log_rewrite was also set.
7338 60. Avoid a compiler warning on 64-bit systems in dsearch.c by avoiding the use
7339 of (int)(handle) when we know that handle contains (void *)(-1).
7341 61. The Exim daemon panic-logs an error return when it closes the incoming
7342 connection. However "connection reset by peer" seems to be common, and
7343 isn't really an error worthy of noting specially, so that particular error
7346 62. When Exim is trying to find all the local interfaces, it used to panic and
7347 die if the ioctl to get the interface flags failed. However, it seems that
7348 on at least one OS (Solaris 9) it is possible to have an interface that is
7349 included in the list of interfaces, but for which you get a failure error
7350 for this call. This happens when the interface is not "plumbed" into a
7351 protocol (i.e. neither IPv4 nor IPv6). I've changed the code so that a
7352 failure of the "get flags" call assumes that the interface is down.
7354 63. Added a ${eval10: operator, which assumes all numbers are decimal. This
7355 makes life easier for people who are doing arithmetic on fields extracted
7356 from dates, where you often get leading zeros that should not be
7357 interpreted as octal.
7359 64. Added qualify_domain to the redirect router, to override the global
7362 65. If a pathologically long header line contained very many addresses (the
7363 report of this problem mentioned 10 000) and each of them was rewritten,
7364 Exim could use up a very large amount of memory. (It kept on making new
7365 copies of the header line as it rewrote, and never released the old ones.)
7366 At the expense of a bit more processing, the header rewriting function has
7367 been changed so that it no longer eats memory in this way.
7369 66. The generation of the Received: header has been moved from the time that a
7370 message starts to be received, to the time that it finishes. The timestamp
7371 in the Received: header should now be very close to that of the <= log
7372 line. There are two side-effects of this change:
7374 (a) If a message is rejected by a DATA or non-SMTP ACL or local_scan(), the
7375 logged header lines no longer include the local Received: line, because
7376 it has not yet been created. The same applies to a copy of the message
7377 that is returned to a non-SMTP sender when a message is rejected.
7379 (b) When a filter file is tested using -bf, no additional Received: header
7380 is added to the test message. After some thought, I decided that this
7383 This change does not affect the value of $received_for. It is still set
7384 after address rewriting, but before local_scan() is called.
7386 67. Installed the latest Cygwin-specific files from the Cygwin maintainer.
7388 68. GnuTLS: If an empty file is specified for tls_verify_certificates, GnuTLS
7389 gave an unhelpful panic error message, and a defer error. I have managed to
7390 change this behaviour so that it now rejects any supplied certificate,
7391 which seems right, as the list of acceptable certificates is empty.
7393 69. OpenSSL: If an empty file is specified for tls_verify_certificates, OpenSSL
7394 gave an unhelpful defer error. I have not managed to make this reject any
7395 supplied certificates, but the error message it gives is "no certificate
7396 supplied", which is not helpful.
7398 70. exigrep's output now also includes lines that are not associated with any
7399 message, but which match the given pattern. Implemented by a patch from
7400 Martin Sluka, which also tidied up the Perl a bit.
7402 71. Recipient callout verification, like sender verification, was using <> in
7403 the MAIL FROM command. This isn't really the right thing, since the actual
7404 sender may affect whether the remote host accepts the recipient or not. I
7405 have changed it to use the actual sender in the callout; this means that
7406 the cache record is now keyed on a recipient/sender pair, not just the
7407 recipient address. There doesn't seem to be a real danger of callout loops,
7408 since a callout by the remote host to check the sender would use <>.
7409 [SEE ABOVE: changed after hitting problems.]
7411 72. Exim treats illegal SMTP error codes that do not begin with 4 or 5 as
7412 temporary errors. However, in the case of such a code being given after
7413 the end of a data transmission (i.e. after ".") Exim was failing to write
7414 a retry record for the message. (Yes, there was some broken host that was
7415 actually sending 8xx at this point.)
7417 73. An unknown lookup type in a host list could cause Exim to panic-die when
7418 the list was checked. (An example that provoked this was putting <; in the
7419 middle of a list instead of at the start.) If this happened during a DATA
7420 ACL check, a -D file could be left lying around. This kind of configuration
7421 error no longer causes Exim to die; instead it causes a defer error. The
7422 incident is still logged to the main and panic logs.
7424 74. Buglet left over from Exim 3 conversion. The message "too many messages
7425 in one connection" was written to the rejectlog but not the mainlog, except
7426 when address rewriting (yes!) was being logged.
7428 75. Added write_rejectlog option.
7430 76. When a system filter was run not as root (that is, when system_filter_user
7431 was set), the values of the $n variables were not being returned to the
7432 main process; thus, they were not subsequently available in the $sn
7435 77. Added +return_path_on_delivery log selector.
7437 78. A connection timeout was being treated differently from recipients deferred
7438 when testing hosts_max_try with a message that was older than the host's
7439 retry timeout. (The host should not be counted, thus allowing all hosts to
7440 be tried at least once before bouncing.) This may have been the cause of an
7441 occasionally reported bug whereby a message would remain on the queue
7442 longer than the retry timeout, but would be bounced if a delivery was
7443 forced. I say "may" because I never totally pinned down the problem;
7444 setting up timeout/retry tests is difficult. See also the next item.
7446 79. The ultimate address timeout was not being applied to errors that involved
7447 a combination of host plus message (for example, a timeout on a MAIL
7448 command). When an address resolved to a number of possible hosts, and they
7449 were not all tried for each delivery (e.g. because of hosts_max_try), a
7450 message could remain on the queue longer than the retry timeout.
7452 80. Sieve bug: "stop" inside "elsif" was broken. Applied a patch from Michael
7455 81. Fixed an obscure SMTP outgoing bug which required at least the following
7456 conditions: (a) there was another message waiting for the same server;
7457 (b) the server returned 5xx to all RCPT commands in the first message so
7458 that the message was not completed; (c) the server dropped the connection
7459 or gave a negative response to the RSET that Exim sends to abort the
7460 transaction. The observed case was a dropped connection after DATA that had
7461 been sent in pipelining mode. That is, the server had advertised PIPELINING
7462 but was not implementing it correctly. The effect of the bug was incorrect
7463 behaviour, such as trying another host, and this could lead to a crash.
7469 1. The 3rd arguments to getsockname(), getpeername(), and accept() in exim.c
7470 and daemon.c were passed as pointers to ints; they should have been
7471 pointers to socklen_t variables (which are typically unsigned ints).
7473 2. Some signed/unsigned type warnings in the os.c file for Linux have been
7476 3. Fixed a really odd bug that affected only the testing scheme; patching a
7477 certain fixed string in the binary changed the value of another string that
7478 happened to be identical to the end of the original first string.
7480 4. When gethostbyname() (or equivalent) is passed an IP address as a "host
7481 name", it returns that address as the IP address. On some operating
7482 systems (e.g. Solaris), it also passes back the IP address string as the
7483 "host name". However, on others (e.g. Linux), it passes back an empty
7484 string. Exim wasn't checking for this, and was changing the host name to an
7485 empty string, assuming it had been canonicalized.
7487 5. Although rare, it is permitted to have more than one PTR record for a given
7488 IP address. I thought that gethostbyaddr() or getipnodebyaddr() always gave
7489 all the names associated with an address, because they do in Solaris.
7490 However, it seems that they do not in Linux for data that comes from the
7491 DNS. If an address in /etc/hosts has multiple names, they _are_ all given.
7492 I found this out when I moved to a new Linux workstation and tried to run
7493 the Exim test suite.
7495 To get round this problem I have changed the code so that it now does its
7496 own call to the DNS to look up PTR records when searching for a host name.
7497 If nothing can be found in the DNS, it tries gethostbyaddr(), so that
7498 addresses that are only in /etc/hosts are still found.
7500 This behaviour is, however, controlled by an option called host_lookup_
7501 order, which defaults to "bydns:byaddr". If people want to use the other
7502 order, or indeed, just use one or the other means of lookup, they can
7503 specify it in this variable.
7505 6. If a PTR record yields an empty name, Exim treats it as non-existent. In
7506 some operating systems, this comes back from gethostbyaddr() as an empty
7507 string, and this is what Exim used to test for. However, it seems that in
7508 other systems, "." is yielded. Exim now tests for this case too.
7510 7. The values of check_spool_space and check_log_space are now held internally
7511 as a number of kilobytes instead of an absolute number of bytes. If a
7512 numbers is specified without 'K' or 'M', it is rounded up to the nearest
7513 kilobyte. This means that much larger values can be stored.
7515 8. Exim monitor: an attempt to get the action menu when not actually pointing
7516 at a message produces an empty menu entitled "No message selected". This
7517 works on Solaris (OpenWindows). However, XFree86 does not like a menu with
7518 no entries in it ("Shell widget menu has zero width and/or height"). So I
7519 have added a single, blank menu entry in this case.
7521 9. Added ${quote_local_part.
7523 10. MIME decoding is now applied to the contents of Subject: header lines when
7526 11. Now that a reference to $sender_host_address automatically causes a reverse
7527 lookup to occur if necessary (4.13/18), there is no need to arrange for a
7528 host lookup before query-style lookups in lists that might use this
7529 variable. This has therefore been abolished, and the "net-" prefix is no
7530 longer necessary for query-style lookups.
7532 12. The Makefile for SCO_SV contained a setting of LDFLAGS. This appears to
7533 have been a typo for LFLAGS, so it has been changed.
7535 13. The install script calls Exim with "-C /dev/null" in order to find the
7536 version number. If ALT_CONFIG_PREFIX was set, this caused an error message
7537 to be output. However, since Exim outputs its version number before the
7538 error, it didn't break the script. It just looked ugly. I fixed this by
7539 always allowing "-C /dev/null" if the caller is root.
7541 14. Ignore overlarge ACL variable number when reading spool file - insurance
7542 against a later release with more variables having written the file.
7544 15. The standard form for an IPv6 address literal was being rejected by EHLO.
7545 Example: [IPv6:2002:c1ed:8229:10:202:2dff:fe07:a42a]. Exim now accepts
7546 this, as well as the form without the "IPv6" on the front.
7548 16. Added CHOWN_COMMAND=/usr/sbin/chown and LIBS=-lresolv to the
7549 OS/Makefile-Darwin file.
7551 17. Fixed typo in lookups/ldap.c: D_LOOKUP should be D_lookup. This applied
7552 only to LDAP libraries that do not have LDAP_OPT_DEREF.
7554 18. After change 4.21/52, "%ld" was used to format the contents of the $inode
7555 variable. However, some OS use ints for inodes. I've added cast to long int
7556 to get rid of the compiler warning.
7558 19. I had forgotten to lock out "/../" in configuration file names when
7559 ALT_CONFIG_PREFIX was set.
7561 20. Routers used for verification do not need to specify transports. However,
7562 if such a router generated a host list, and callout was configured, Exim
7563 crashed, because it could not find a port number from the (non-existent)
7564 transport. It now assumes port 25 in this circumstance.
7566 21. Added the -t option to exigrep.
7568 22. If LOOKUP_LSEARCH is defined, all three linear search methods (lsearch,
7569 wildlsearch, nwildlsearch) are compiled. LOOKUP_WILDLSEARCH and LOOKUP_
7570 NWILDLSEARCH are now obsolete, but retained for compatibility. If either of
7571 them is set, LOOKUP_LSEARCH is forced.
7573 23. "exim -bV" now outputs a list of lookups that are included in the binary.
7575 24. Added sender and host information to the "rejected by local_scan()" log
7576 line; previously there was no indication of these.
7578 25. Added .include_if_exists.
7580 26. Change 3.952/11 added an explicit directory sync on top of a file sync for
7581 Linux. It turns out that not all file systems support this. Apparently some
7582 versions of NFS do not. (It's rare to put Exim's spool on NFS, but people
7583 do it.) To cope with this, the error EINVAL, which means that sync-ing is
7584 not supported on the file descriptor, is now ignored when Exim is trying to
7585 sync a directory. This applies only to Linux.
7587 27. Added -DBIND_8_COMPAT to the CLFAGS setting for Darwin.
7589 28. In Darwin (MacOS X), the PAM headers are in /usr/include/pam and not in
7590 /usr/include/security. There's now a flag in OS/os.h-Darwin to cope with
7593 29. Added support for maildirsize files from supplied patch (modified a bit).
7595 30. The use of :fail: followed by an empty string could lead Exim to respond to
7596 sender verification failures with (e.g.):
7598 550 Verification failed for <xxx>
7599 550 Sender verify failed
7601 where the first response line was missing the '-' that indicates it is not
7602 the final line of the response.
7604 31. The loop for finding the name of the user that called Exim had a hardwired
7605 limit of 10; it now uses the value of finduser_retries, which is used for
7606 all other user lookups.
7608 32. Added $received_count variable, available in data and not_smtp ACLs, and at
7611 33. Exim was neglecting to zero errno before one call of strtol() when
7612 expanding a string and expecting an integer value. On some systems this
7613 resulted in spurious "integer overflow" errors. Also, it was casting the
7614 result into an int without checking.
7616 34. Testing for a connection timeout using "timeout_connect" in the retry rules
7617 did not work. The code looks as if it has *never* worked, though it appears
7618 to have been documented since at least release 1.62. I have made it work.
7620 35. The "timeout_DNS" error in retry rules, also documented since at least
7621 1.62, also never worked. As it isn't clear exactly what this means, and
7622 clearly it isn't a major issue, I have abolished the feature by treating it
7623 as "timeout", and writing a warning to the main and panic logs.
7625 36. The display of retry rules for -brt wasn't always showing the error code
7628 37. Added new error conditions to retry rules: timeout_A, timeout_MX,
7629 timeout_connect_A, timeout_connect_MX.
7631 38. Rewriting the envelope sender at SMTP time did not allow it to be rewritten
7632 to the empty sender.
7634 39. The daemon was not analysing the content of -oX till after it had closed
7635 stderr and disconnected from the controlling terminal. This meant that any
7636 syntax errors were only noted on the panic log, and the return code from
7637 the command was 0. By re-arranging the code a little, I've made the
7638 decoding happen first, so such errors now appear on stderr, and the return
7639 code is 1. However, the actual setting up of the sockets still happens in
7640 the disconnected process, so errors there are still only recorded on the
7643 40. A daemon listener on a wildcard IPv6 socket that also accepts IPv4
7644 connections (as happens on some IP stacks) was logged at start up time as
7645 just listening for IPv6. It now logs "IPv6 with IPv4". This differentiates
7646 it from "IPv6 and IPv4", which means that two separate sockets are being
7649 41. The debug output for gethostbyname2() or getipnodebyname() failures now
7650 says whether AF_INET or AF_INET6 was passed as an argument.
7652 42. Exiwhat output was messed up when time zones were included in log
7655 43. Exiwhat now gives more information about the daemon's listening ports,
7656 and whether -tls-on-connect was used.
7658 44. The "port" option of the smtp transport is now expanded.
7660 45. A "message" modifier in a "warn" statement in a non-message ACL was being
7661 silently ignored. Now an error message is written to the main and panic
7664 46. There's a new ACL modifier called "logwrite" which writes to a log file
7665 as soon as it is encountered.
7667 47. Added $local_user_uid and $local_user_gid at routing time.
7669 48. Exim crashed when trying to verify a sender address that was being
7672 49. Exim was recognizing only a space character after ".include". It now also
7673 recognizes a tab character.
7675 50. Fixed several bugs in the Perl script that creates the exim.8 man page by
7676 extracting the relevant information from the specification. The man page no
7677 longer contains scrambled data for the -d option, and I've added a section
7678 at the front about calling Exim under different names.
7680 51. Added "extra_headers" argument to the "mail" command in filter files.
7682 52. Redirecting mail to an unqualified address in a Sieve filter caused Exim to
7685 53. Installed eximstats 1.29.
7687 54. Added transport_filter_timeout as a generic transport option.
7689 55. Exim no longer adds an empty Bcc: header to messages that have no To: or
7690 Cc: header lines. This was required by RFC 822, but it not required by RFC
7693 56. Exim used to add From:, Date:, and Message-Id: header lines to any
7694 incoming messages that did not have them. Now it does so only if the
7695 message originates locally, that is, if there is no associated remote host
7696 address. When Resent- header lines are present, this applies to the Resent-
7697 lines rather than the non-Resent- lines.
7699 57. Drop incoming SMTP connection after too many syntax or protocol errors. The
7700 limit is controlled by smtp_max_synprot_errors, defaulting to 3.
7702 58. Messages for configuration errors now include the name of the main
7703 configuration file - useful now that there may be more than one file in a
7704 list (.included file names were always shown).
7706 59. Change 4.21/82 (run initgroups() when starting the daemon) causes problems
7707 for those rare installations that do not start the daemon as root or run it
7708 setuid root. I've cut out the call to initgroups() if the daemon is not
7711 60. The Exim user and group can now be bound into the binary as text strings
7712 that are looked up at the start of Exim's processing.
7714 61. Applied a small patch for the Interbase code, supplied by Ard Biesheuvel.
7716 62. Added $mailstore_basename variable.
7718 63. Installed patch to sieve.c from Michael Haardt.
7720 64. When Exim failed to open the panic log after failing to open the main log,
7721 the original message it was trying to log was written to stderr and debug
7722 output, but if they were not available (the usual case in production), it
7723 was lost. Now it is written to syslog before the two lines that record the
7724 failures to open the logs.
7726 65. Users' Exim filters run in subprocesses under the user's uid. It is
7727 possible for a "deliver" command or an alias in a "personal" command to
7728 provoke an address rewrite. If logging of address rewriting is configured,
7729 this fails because the process is not running as root or exim. There may be
7730 a better way of dealing with this, but for the moment (because 4.30 needs
7731 to be released), I have disabled address rewrite logging when running a
7732 filter in a non-root, non-exim process.
7738 1. The buildconfig auxiliary program wasn't quoting the value set for
7739 HEADERS_CHARSET. This caused a compilation error complaining that 'ISO' was
7740 not defined. This bug was masked in 4.22 by the effect that was fixed in
7743 2. Some messages that were rejected after a message id was allocated were
7744 shown as "incomplete" by exigrep. It no longer does this for messages that
7745 are rejected by local_scan() or the DATA or non-SMTP ACLs.
7747 3. If a Message-ID: header used a domain literal in the ID, and Exim did not
7748 have allow_domain_literals set, the ID did not get logged in the <= line.
7749 Domain literals are now always recognized in Message-ID: header lines.
7751 4. The first argument for a ${extract expansion item is the key name or field
7752 number. Leading and trailing spaces in this item were not being ignored,
7753 causing some misleading effects.
7755 5. When deliver_drop_privilege was set, single queue runner processes started
7756 manually (i.e. by the command "exim -q") or by the daemon (which uses the
7757 same command in the process it spins off) were not dropping privilege.
7759 6. When the daemon running as "exim" started a queue runner, it always
7760 re-executed Exim in the spun-off process. This is a waste of effort when
7761 deliver_drop_privilege is set. The new process now just calls the
7762 queue-runner function directly.
7768 1. Typo in the src/EDITME file: it referred to HEADERS_DECODE_TO instead of
7771 2. Change 4.21/73 introduced a bug. The pid file path set by -oP was being
7772 ignored. Though the use of -oP was forcing the writing of a pid file, it
7773 was always written to the default place.
7775 3. If the message "no IP address found for host xxxx" is generated during
7776 incoming verification, it is now followed by identification of the incoming
7777 connection (so you can more easily find what provoked it).
7779 4. Bug fix for Sieve filters: "stop" inside a block was not working properly.
7781 5. Added some features to "harden" Exim a bit more against certain attacks:
7783 (a) There is now a build-time option called FIXED_NEVER_USERS that can
7784 be put in Local/Makefile. This is like the never_users runtime option,
7785 but it cannot be overridden. The default setting is "root".
7787 (b) If ALT_CONFIG_PREFIX is defined in Local/Makefile, it specifies a
7788 prefix string with which any file named in a -C command line option
7791 (c) If ALT_CONFIG_ROOT_ONLY is defined in Local/Makefile, root privilege
7792 is retained for -C and -D only if the caller of Exim is root. Without
7793 it, the exim user may also use -C and -D and retain privilege.
7795 (d) If DISABLE_D_OPTION is defined in Local/Makefile, the use of the -D
7796 command line option is disabled.
7798 6. Macro names set by the -D option must start with an upper case letter, just
7799 like macro names defined in the configuration file.
7801 7. Added "dereference=" facility to LDAP.
7803 8. Two instances of the typo "uknown" in the source files are fixed.
7805 9. If a PERL_COMMAND setting in Local/Makefile was not at the start of a line,
7806 the Configure-Makefile script screwed up while processing it.
7808 10. Incorporated PCRE 4.4.
7810 11. The SMTP synchronization check was not operating right at the start of an
7811 SMTP session. For example, it could not catch a HELO sent before the client
7812 waited for the greeting. There is now a check for outstanding input at the
7813 point when the greeting is written. Because of the duplex, asynchronous
7814 nature of TCP/IP, it cannot be perfect - the incorrect input may be on its
7815 way, but not yet received, when the check is performed.
7817 12. Added tcp_nodelay to make it possible to turn of the setting of TCP_NODELAY
7818 on TCP/IP sockets, because this apparently causes some broken clients to
7821 13. Installed revised OS/Makefile-CYGWIN and OS/os.c-cygwin (the .h file was
7822 unchanged) from the Cygwin maintainer.
7824 14. The code for -bV that shows what is in the binary showed "mbx" when maildir
7825 was supported instead of testing for mbx. Effectively a typo.
7827 15. The spa authenticator server code was not checking that the input it
7828 received was valid base64.
7830 16. The debug output line for the "set" modifier in ACLs was not showing the
7831 name of the variable that was being set.
7833 17. Code tidy: the variable type "vtype_string" was never used. Removed it.
7835 18. Previously, a reference to $sender_host_name did not cause a DNS reverse
7836 lookup on its own. Something else was needed to trigger the lookup. For
7837 example, a match in host_lookup or the need for a host name in a host list.
7838 Now, if $sender_host_name is referenced and the host name has not yet been
7839 looked up, a lookup is performed. If the lookup fails, the variable remains
7840 empty, and $host_lookup_failed is set to "1".
7842 19. Added "eqi" as a case-independent comparison operator.
7844 20. The saslauthd authentication condition could segfault if neither service
7845 nor realm was specified.
7847 21. If an overflowing value such as "2048M" was set for message_size_limit, the
7848 error message that was logged was misleading, and incoming SMTP
7849 connections were dropped. The message is now more accurate, and temporary
7850 errors are given to SMTP connections.
7852 22. In some error situations (such as 21 above) Exim rejects all SMTP commands
7853 (except RSET) with a 421 error, until QUIT is received. However, it was
7854 failing to send a response to QUIT.
7856 23. The HELO ACL was being run before the code for helo_try_verify_hosts,
7857 which made it impossible to use "verify = helo" in the HELO ACL. The HELO
7858 ACL is now run after the helo_try_verify_hosts code.
7860 24. "{MD5}" and "{SHA1}" are now recognized as equivalent to "{md5"} and
7861 "{sha1}" in the "crypteq" expansion condition (in fact the comparison is
7862 case-independent, so other case variants are also recognized). Apparently
7863 some systems use these upper case variants.
7865 25. If more than two messages were waiting for the same host, and a transport
7866 filter was specified for the transport, Exim sent two messages over the
7867 same TCP/IP connection, and then failed with "socket operation on non-
7868 socket" when it tried to send the third.
7870 26. Added Exim::debug_write and Exim::log_write for embedded Perl use.
7872 27. The extern definition of crypt16() in expand.c was not being excluded when
7873 the OS had its own crypt16() function.
7875 28. Added bounce_return_body as a new option, and bounce_return_size_limit
7876 as a preferred synonym for return_size_limit, both as an option and as an
7879 29. Added LIBS=-liconv to OS/Makefile-OSF1.
7881 30. Changed the default configuration ACL to relax the local part checking rule
7882 for addresses that are not in any local domains. For these addresses,
7883 slashes and pipe symbols are allowed within local parts, but the sequence
7884 /../ is explicitly forbidden.
7886 31. SPA server authentication was not clearing the challenge buffer before
7889 32. log_message in a "warn" ACL statement was writing to the reject log as
7890 well as to the main log, which contradicts the documentation and doesn't
7891 seem right (because no rejection is happening). So I have stopped it.
7893 33. Added Ard Biesheuvel's lookup code for accessing an Interbase database.
7894 However, I am unable to do any testing of this.
7896 34. Fixed an infelicity in the appendfile transport. When checking directories
7897 for a mailbox, to see if any needed to be created, it was accidentally
7898 using path names with one or more superfluous leading slashes; tracing
7899 would show up entries such as stat("///home/ph10", 0xFFBEEA48).
7901 35. If log_message is set on a "discard" verb in a MAIL or RCPT ACL, its
7902 contents are added to the log line that is written for every discarded
7903 recipient. (Previously a log_message setting was ignored.)
7905 36. The ${quote: operator now quotes the string if it is empty.
7907 37. The install script runs exim in order to find its version number. If for
7908 some reason other than non-existence or emptiness, which it checks, it
7909 could not run './exim', it was installing it with an empty version number,
7910 i.e. as "exim-". This error state is now caught, and the installation is
7913 38. An argument was missing from the function that creates an error message
7914 when Exim fails to connect to the socket for saslauthd authentication.
7915 This could cause Exim to crash, or give a corrupted message.
7917 39. Added isip, isip4, and isip6 to ${if conditions.
7919 40. The ACL variables $acl_xx are now saved with the message, and can be
7920 accessed later in routers, transports, and filters.
7922 41. The new lookup type nwildlsearch is like wildlsearch, except that the key
7923 strings in the file are not string-expanded.
7925 42. If a MAIL command specified a SIZE value that was too large to fit into an
7926 int variable, the check against message_size_limit failed. Such values are
7927 now forced to INT_MAX, which is around 2Gb for a 32-bit variable. Maybe one
7928 day this will have to be increased, but I don't think I want to be around
7929 when emails are that large.
7936 1. Removed HAVE_ICONV=yes from OS/Makefile-FreeBSD, since it seems that
7937 iconv() is not standard in FreeBSD.
7939 2. Change 4.21/17 was buggy and could cause stack overwriting on a system with
7940 IPv6 enabled. The observed symptom was a segmentation fault on return from
7941 the function os_common_find_running_interfaces() in src/os.c.
7943 3. In the check_special_case() function in daemon.c I had used "errno" as an
7944 argument name, which causes warnings on some systems. This was basically a
7945 typo, since it was named "eno" in the comments!
7947 4. The code that waits for the clock to tick (at a resolution of some fraction
7948 of a second) so as to ensure message-id uniqueness was always waiting for
7949 at least one whole tick, when it could have waited for less. [This is
7950 almost certainly not relevant at current processor speeds, where it is
7951 unlikely to ever wait at all. But we try to future-proof.]
7953 5. The function that sleeps for a time interval that includes fractions of a
7954 second contained a race. It did not block SIGALRM between setting the
7955 timer, and suspending (a couple of lines later). If the interval was short
7956 and the sigsuspend() was delayed until after it had expired, the suspension
7957 never ended. On busy systems this could lead to processes getting stuck for
7960 6. Some uncommon configurations may cause a lookup to happen in a queue runner
7961 process, before it forks any delivery processes. The open lookup caching
7962 mechanism meant that the open file or database connection was passed into
7963 the delivery process. The problem was that delivery processes always tidy
7964 up cached lookup data. This could cause a problem for the next delivery
7965 process started by the queue runner, because the external queue runner
7966 process does not know about the closure. So the next delivery process
7967 still has data in the lookup cache. In the case of a file lookup, there was
7968 no problem because closing a file descriptor in a subprocess doesn't affect
7969 the parent. However, if the lookup was caching a connection to a database,
7970 the connection was closed, and the second delivery process was likely to
7971 see errors such as "PGSQL: query failed: server closed the connection
7972 unexpectedly". The problem has been fixed by closing all cached lookups
7973 in a queue runner before running a delivery process.
7975 7. Compiler warning on Linux for the second argument of iconv(), which doesn't
7976 seem to have the "const" qualifier which it has on other OS. I've
7979 8. Change 4.21/2 was too strict. It is only if there are two authenticators
7980 *of the same type* (client or server) with the same public name that an
7981 error should be diagnosed.
7983 9. When Exim looked up a host name for an IP address, but failed to find the
7984 original IP address when looking up the host name (a safety check), it
7985 output the message "<ip address> does not match any IP for NULL", which was
7986 confusing, to say the least. The bug was that the host name should have
7987 appeared instead of "NULL".
7989 10. Since release 3.03, if Exim is called by a uid other than root or the Exim
7990 user that is built into the binary, and the -C or -D options is used, root
7991 privilege is dropped before the configuration file is read. In addition,
7992 logging is switched to stderr instead of the normal log files. If the
7993 configuration then re-defines the Exim user, the unprivileged environment
7994 is probably not what is expected, so Exim logs a panic warning message (but
7997 However, if deliver_drop_privilege is set, the unprivileged state may well
7998 be exactly what is intended, so the warning has been cut out in that case,
7999 and Exim is allowed to try to write to its normal log files.
8005 1. smtp_return_error_details was not giving details for temporary sender
8006 or receiver verification errors.
8008 2. Diagnose a configuration error if two authenticators have the same public
8011 3. Exim used not to create the message log file for a message until the first
8012 delivery attempt. This could be confusing when incoming messages were held
8013 for policy or load reasons. The message log file is now created at the time
8014 the message is received, and an initial "Received" line is written to it.
8016 4. The automatically generated man page for command line options had a minor
8017 bug that caused no ill effects; however, a more serious problem was that
8018 the procedure for building the man page automatically didn't always
8019 operate. Consequently, release 4.20 contains an out-of-date version. This
8020 shouldn't happen again.
8022 5. When building Exim with embedded Perl support, the script that builds the
8023 Makefile was calling 'perl' to find its compile-time parameters, ignoring
8024 any setting of PERL_COMMAND in Local/Makefile. This is now fixed.
8026 6. The freeze_tell option was not being used for messages that were frozen on
8027 arrival, either by an ACL or by local_scan().
8029 7. Added the smtp_incomplete_transaction log selector.
8031 8. After STARTTLS, Exim was not forgetting that it had advertised AUTH, so it
8032 was accepting AUTH without a new EHLO.
8034 9. Added tls_remember_esmtp to cope with YAEB. This allows AUTH and other
8035 ESMTP extensions after STARTTLS without a new EHLO, in contravention of the
8038 10. Logging of TCP/IP connections (when configured) now happens in the main
8039 daemon process instead of the child process, so that the TCP/IP connection
8040 count is more accurate (but it can never be perfect).
8042 11. The use of "drop" in a nested ACL was not being handled correctly in the
8043 outer ACL. Now, if condition failure induced by the nested "drop" causes
8044 the outer ACL verb to deny access ("accept" or "discard" after "endpass",
8045 or "require"), the connection is dropped.
8047 12. Similarly, "discard" in a nested ACL wasn't being handled. A nested ACL
8048 that yield "discard" can now be used with an "accept" or a "discard" verb,
8049 but an error is generated for any others (because I can't see a useful way
8050 to define what should happen).
8052 13. When an ACL is read dynamically from a file (or anywhere else), the lines
8053 are now processed in the same way as lines in the Exim configuration file.
8054 In particular, continuation lines are supported.
8056 14. Added the "dnslists = a.b.c!=n.n.n.n" feature.
8058 15. Added -ti meaning -t -i.
8060 16. Check for letters, digits, hyphens, and dots in the names of dnslist
8061 domains, and warn by logging if others are found.
8063 17. At least on BSD, alignment is not guaranteed for the array of ifreq's
8064 returned from GIFCONF when Exim is trying to find the list of interfaces on
8065 a host. The code in os.c has been modified to copy each ifreq to an aligned
8066 structure in all cases.
8068 Also, in some cases, the returned ifreq's were being copied to a 'struct
8069 ifreq' on the stack, which was subsequently passed to host_ntoa(). That
8070 means the last couple of bytes of an IPv6 address could be chopped if the
8071 ifreq contained only a normal sockaddr (14 bytes storage).
8073 18. Named domain lists were not supported in the hosts_treat_as_local option.
8074 An entry such as +xxxx was not recognized, and was treated as a literal
8077 19. Ensure that header lines added by a DATA ACL are included in the reject log
8078 if the ACL subsequently rejects the message.
8080 20. Upgrade the cramtest.pl utility script to use Digest::MD5 instead of just
8081 MD5 (which is deprecated).
8083 21. When testing a filter file using -bf, Exim was writing a message when it
8084 took the sender from a "From " line in the message, but it was not doing so
8085 when it took $return_path from a Return-Path: header line. It now does.
8087 22. If the contents of a "message" modifier for a "warn" ACL verb do not begin
8088 with a valid header line field name (a series of printing characters
8089 terminated by a colon, Exim now inserts X-ACL-Warn: at the beginning.
8091 23. Changed "disc" in the source to "disk" to conform to the documentation and
8092 the book and for uniformity.
8094 24. Ignore Sendmail's -Ooption=value command line item.
8096 25. When execve() failed while trying to run a command in a pipe transport,
8097 Exim was returning EX_UNAVAILABLE (69) from the subprocess. However, this
8098 could be confused with a return value of 69 from the command itself. This
8099 has been changed to 127, the value the shell returns if it is asked to run
8100 a non-existent command. The wording for the related log line suggests a
8101 non-existent command as the problem.
8103 26. If received_header_text expands to an empty string, do not add a Received:
8104 header line to the message. (Well, it adds a token one on the spool, but
8105 marks it "old" so that it doesn't get used or transmitted.)
8107 27. Installed eximstats 1.28 (addition of -nt option).
8109 28. There was no check for failure on the call to getsockname() in the daemon
8110 code. This can fail if there is a shortage of resources on the system, with
8111 ENOMEM, for example. A temporary error is now given on failure.
8113 29. Contrary to the C standard, it seems that in some environments, the
8114 equivalent of setlocale(LC_ALL, "C") is not obeyed at the start of a C
8115 program. Exim now does this explicitly; it affects the formatting of
8116 timestamps using strftime().
8118 30. If exiqsumm was given junk data, it threw up some uninitialized variable
8119 complaints. I've now initialized all the variables, to avoid this.
8121 32. Header lines added by a system filter were not being "seen" during
8122 transport-time rewrites.
8124 33. The info_callback() function passed to OpenSSL is set up with type void
8125 (*)(SSL *, int, int), as described somewhere. However, when calling the
8126 function (actually a macro) that sets it up, the type void(*)() is
8127 expected. I've put in a cast to prevent warnings from picky compilers.
8129 34. If a DNS black list lookup found a CNAME record, but there were no A
8130 records associated with the domain it pointed at, Exim crashed.
8132 35. If a DNS black list lookup returned more than one A record, Exim ignored
8133 all but the first. It now scans all returned addresses if a particular IP
8134 value is being sought. In this situation, the contents of the
8135 $dnslist_value variable are a list of all the addresses, separated by a
8138 36. Tightened up the rules for host name lookups using reverse DNS. Exim used
8139 to accept a host name and all its aliases if the forward lookup for any of
8140 them yielded the IP address of the incoming connection. Now it accepts only
8141 those names whose forward lookup yields the correct IP address. Any other
8142 names are discarded. This closes a loophole whereby a rogue DNS
8143 administrator could create reverse DNS records to break through a
8144 wildcarded host restriction in an ACL.
8146 37. If a user filter or a system filter that ran in a subprocess used any of
8147 the numerical variables ($1, $2 etc), or $thisaddress, in a pipe command,
8148 the wrong values were passed to the pipe command ($thisaddress had the
8149 value of $0, $0 had the value of $1, etc). This bug was introduced by
8150 change 4.11/101, and not discovered because I wrote an inadequate test. :-(
8152 38. Improved the line breaking for long SMTP error messages from ACLs.
8153 Previously, if there was no break point between 40 and 75 characters, Exim
8154 left the rest of the message alone. Two changes have been made: (a) I've
8155 reduced the minimum length to 35 characters; (b) if it can't find a break
8156 point between 35 and 75 characters, it looks ahead and uses the first one
8157 that it finds. This may give the occasional overlong line, but at least the
8158 remaining text gets split now.
8160 39. Change 82 of 4.11 was unimaginative. It assumed the limit on the number of
8161 file descriptors might be low, and that setting 1000 would always raise it.
8162 It turns out that in some environments, the limit is already over 1000 and
8163 that lowering it causes trouble. So now Exim takes care not to decrease it.
8165 40. When delivering a message, the value of $return_path is set to $sender_
8166 address at the start of routing (routers may change the value). By an
8167 oversight, this default was not being set up when an address was tested by
8168 -bt or -bv, which affected the outcome if any router or filter referred to
8171 41. The idea of the "warn" ACL verb is that it adds a header or writes to the
8172 log only when "message" or "log_message" are set. However, if one of the
8173 conditions was an address verification, or a call to a nested ACL, the
8174 messages generated by the underlying test were being passed through. This
8175 no longer happens. The underlying message is available in $acl_verify_
8176 message for both "message" and "log_message" expansions, so it can be
8177 passed through if needed.
8179 42. Added RFC 2047 interpretation of header lines for $h_ expansions, with a
8180 new expansion $bh_ to give the encoded byte string without charset
8181 translation. Translation happens only if iconv() is available; HAVE_ICONV
8182 indicates this at build time. HEADERS_CHARSET gives the charset to
8183 translate to; headers_charset can change it in the configuration, and
8184 "headers charset" can change it in an individual filter file.
8186 43. Now that we have a default RFC 2047 charset (see above), the code in Exim
8187 that creates RFC 2047 encoded "words" labels them as that charset instead
8188 of always using iso-8859-1. The cases are (i) the explicit ${rfc2047:
8189 expansion operator; (ii) when Exim creates a From: line for a local
8190 message; (iii) when a header line is rewritten to include a "phrase" part.
8192 44. Nasty bug in exiqsumm: the regex to skip already-delivered addresses was
8193 buggy, causing it to skip the first lines of messages whose message ID
8194 ended in 'D'. This would not have bitten before Exim release 4.14, because
8195 message IDs were unlikely to end in 'D' before then. The effect was to have
8196 incorrect size information for certain domains.
8198 45. #include "config.h" was missing at the start of the crypt16.c module. This
8199 caused trouble on Tru64 (aka OSF1) systems, because HAVE_CRYPT16 was not
8202 46. If there was a timeout during a "random" callout check, Exim treated it as
8203 a failure of the random address, and carried on sending RSET and the real
8204 address. If the delay was just some slowness somewhere, the response to the
8205 original RCPT would be taken as a response to RSET and so on, causing
8206 mayhem of various kinds.
8208 47. Change 50 for 4.20 was a heap of junk. I don't know what I was thinking
8209 when I implemented it. It didn't allow for the fact that some option values
8210 may legitimately be negative (e.g. size_addition), and it didn't even do
8211 the right test for positive values.
8213 48. Domain names in DNS records are case-independent. Exim always looks them up
8214 in lower case. Some resolvers return domain names in exactly the case they
8215 appear in the zone file, that is, they may contain uppercase letters. Not
8216 all resolvers do this - some return always lower case. Exim was treating a
8217 change of case by a resolver as a change of domain, similar to a widening
8218 of a domain abbreviation. This triggered its re-routing code and so it was
8219 trying to route what was effectively the same domain again. This normally
8220 caused routing to fail (because the router wouldn't handle the domain
8221 twice). Now Exim checks for this case specially, and just changes the
8222 casing of the domain that it ultimately uses when it transmits the message
8225 49. Added Sieve (RFC 3028) support, courtesy of Michael Haardt's contributed
8228 50. If a filter generated a file delivery with a non-absolute name (possible if
8229 no home directory exists for the router), the forbid_file option was not
8232 51. Added '&' feature to dnslists, to provide bit mask matching in addition to
8233 the existing equality matching.
8235 52. Exim was using ints instead of ino_t variables in some places where it was
8236 dealing with inode numbers.
8238 53. If TMPDIR is defined in Local/Makefile (default in src/EDITME is
8239 TMPDIR="/tmp"), Exim checks for the presence of an environment variable
8240 called TMPDIR, and if it finds it is different, it changes its value.
8242 54. The smtp_printf() function is now made available to local_scan() so
8243 additional output lines can be written before returning. There is also an
8244 smtp_fflush() function to enable the detection of a dropped connection.
8245 The variables smtp_input and smtp_batched_input are exported to
8248 55. Changed the default runtime configuration: the message "Unknown user"
8249 has been removed from the ACL, and instead placed on the localuser router,
8250 using the cannot_route_message feature. This means that any verification
8251 failures that generate their own messages won't get overridden. Similarly,
8252 the "Unrouteable address" message that was in the ACL for unverifiable
8253 relay addresses has also been removed.
8255 56. Added hosts_avoid_esmtp to the smtp transport.
8257 57. The exicyclog script was not checking for the esoteric option
8258 CONFIGURE_FILE_USE_EUID in the Local/Makefile. It now does this, but it
8259 will work only if exicyclog is run under the appropriate euid.
8261 58. Following a discussion on the list, the rules by which Exim recognises line
8262 endings on incoming messages have been changed. The -dropcr and drop_cr
8263 options are now no-ops, retained only for backwards compatibility. The
8264 following line terminators are recognized: LF CRLF CR. However, special
8265 processing applies to CR:
8267 (i) The sequence CR . CR does *not* terminate an incoming SMTP message,
8268 nor a local message in the state where . is a terminator.
8270 (ii) If a bare CR is encountered in a header line, an extra space is added
8271 after the line terminator so as not to end the header. The reasoning
8272 behind this is that bare CRs in header lines are most likely either
8273 to be mistakes, or people trying to play silly games.
8275 59. The size of a message, as listed by "-bp" or in the Exim monitor window,
8276 was being incorrectly given as 18 bytes larger than it should have been.
8277 This is a VOB (very old bug).
8279 60. This may never have affected anything current, but just in case it has:
8280 When the local host is found other than at the start of a list of hosts,
8281 the local host, those with the same MX, and any that follow, are discarded.
8282 When the list in question was part of a longer list of hosts, the following
8283 hosts (not currently being processed) were also being discarded. This no
8284 longer happens. I'm not sure if this situation could ever has previously
8287 61. Added the "/MX" feature to lists of hosts in the manualroute and query
8290 62. Whenever Exim generates a new message, it now adds an Auto-Submitted:
8291 header. This is something that is recommended in a new Internet Draft, and
8292 is something that is documented as being done by Sendmail. There are two
8293 possible values. For messages generated by the autoreply transport, Exim
8296 Auto-Submitted: auto-replied
8298 whereas for all other generated messages (e.g. bounces) it adds
8300 Auto-Submitted: auto-generated
8302 63. The "personal" condition in filters now includes a test for the
8303 Auto-Submitted: header. If it contains the string "auto-" the message it
8304 not considered personal.
8306 64. Added rcpt_include_affixes as a generic transport option.
8308 65. Added queue_only_override (default true).
8310 66. Added the syslog_duplication option.
8312 67. If what should have been the first header line of a message consisted of
8313 a space followed by a colon, Exim was mis-interpreting it as a header line.
8314 It isn't of course - it is syntactically invalid and should therefore be
8315 treated as the start of the message body. The misbehaviour could have
8316 caused a number of strange effects, including loss of data in subsequent
8317 header lines, and spool format errors.
8319 68. Formerly, the AUTH parameter on a MAIL command was trusted only if the
8320 client host had authenticated. This control can now be exercised by an ACL
8321 for more flexibility.
8323 69. By default, callouts do not happen when testing with -bh. There is now a
8324 variant, -bhc, which does actually run the callout code, including
8325 consulting and updating the callout cache.
8327 70. Added support for saslauthd authentication, courtesy of Alexander
8330 71. If statvfs() failed on the spool or log directories while checking their
8331 size for availability, Exim confusingly gave the error "space shortage".
8332 Furthermore, in debugging mode it crashed with a floating point exception.
8333 These checks are done if check_{spool,log}_{space,inodes} are set, and when
8334 an SMTP message arrives with SIZE= on the MAIL command. As this is a really
8335 serious problem, Exim now writes to the main and panic logs when this
8336 happens, with details of the failure. It then refuses to accept the
8337 incoming message, giving the message "spool directory problem" or "log
8338 directory problem" with a 421 code for SMTP messages.
8340 72. When Exim is about to re-exec itself, it ensures that the file descriptors
8341 0, 1, and 2 exist, because some OS complain for execs without them (see
8342 ChangeLog 4.05/30). If necessary, Exim opens /dev/null to use for these
8343 descriptors. However, the code omitted to check that the open succeeded,
8344 causing mysterious errors if for some reason the permissions on /dev/null
8345 got screwed. Now Exim writes a message to the main and panic logs, and
8346 bombs out if it can't open /dev/null.
8348 73. Re-vamped the way daemon_smtp_port, local_interfaces, and -oX work and
8349 interact so that it is all more flexible. It is supposed to remain
8350 backwards compatible. Also added extra_local_interfaces.
8352 74. Invalid data sent to a SPA (NTLM) server authenticator could cause the code
8353 to bomb out with an assertion failure - to the client this appears as a
8354 connection drop. This problem occurs in the part of the code that was taken
8355 from the Samba project. Fortunately, the assertion is in a very simple
8356 function, so I have fixed this by reproducing the function inline in the
8357 one place where it is called, and arranging for authentication to fail
8358 instead of killing the process with assert().
8360 75. The SPA client code was not working when the server requested OEM rather
8361 than Unicode encoding.
8363 76. Added code to make require_files with a specific uid setting more usable in
8364 the case where statting the file as root fails - usually a non-root-mounted
8365 NFS file system. When this happens and the failure is EACCES, Exim now
8366 forks a subprocess and does the per-uid checking as the relevant uid.
8368 77. Added process_log_path.
8370 78. If log_file_path was not explicitly set, a setting of check_log_space or
8371 check_log_inodes was ignored.
8373 79. If a space check for the spool or log partitions fails, the incident is now
8374 logged. Of course, in the latter case the data may get lost...
8376 80. Added the %p formatting code to string_format() so that it can be used to
8377 print addresses in debug_print(). Adjusted all the address printing in the
8378 debugging in store.c to use %p rather than %d.
8380 81. There was a concern that a line of code in smtp_in.c could overflow a
8381 buffer if a HELO/EHLO command was given followed by 500 or so spaces. As
8382 initially expressed, the concern was not well-founded, because trailing
8383 spaces are removed early. However, if the trailing spaces were followed by
8384 a NULL, they did not get removed, so the overflow was possible. Two fixes
8387 (a) I re-wrote the offending code in a cleaner fashion.
8388 (b) If an incoming SMTP command contains a NULL character, it is rejected
8391 82. When Exim changes uid/gid to the Exim user at daemon start time, it now
8392 runs initgroups(), so that if the Exim user is in any additional groups,
8393 they will be used during message reception.
8399 The change log for 4.20 and earlier releases has been archived.
git://git.exim.org / exim.git / blob