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
30 JH/01 Move the wait-for-next-tick (needed for unique messmage IDs) from
31 after reception to before a subsequent reception. This should
32 mean slightly faster delivery, and also confirmation of reception
35 JH/02 Move from using the pcre library to pcre2. The former is no longer
36 being developed or supported (by the original developer).
38 JH/03 Constification work in the filters module required a major version
39 bump for the local-scan API. Specifically, the "headers_charset"
40 global which is visible via the API is now const and may therefore
41 not be modified by local-scan code.
43 JH/04 Fix ClamAV TCP use under FreeBSD. Previously the OS-specific shim for
44 sendfile() didi not account for the way the ClamAV driver code called it.
46 JH/05 Bug 2819: speed up command-line messages being read in. Previously a
47 time check was being done for every character; replace that with one
50 JH/06 Bug 2815: Fix ALPN sent by server under OpenSSL. Previously the string
51 sent was prefixed with a length byte.
53 JH/07 Change the SMTP feature name for pipelining connect to be compliant with
54 RFC 5321. Previously Dovecot (at least) would log errors during
57 JH/08 Remove stripping of the binaries from the FreeBSD build. This was added
58 in 4.61 without a reason logged. Binaries will be bigger, which might
59 matter on diskspace-constrained systems, but debug is easier.
61 JH/09 Fix macro-definition during "-be" expansion testing. The move to
62 write-protected store for macros had not accounted for these runtime
63 additions; fix by removing this protection for "-be" mode.
65 JH/10 Convert all uses of select() to poll(). FreeBSD 12.2 was found to be
66 handing out large-numbered file descriptors, violating the usual Unix
67 assumption (and required by Posix) that the lowest possible number will be
68 allocated by the kernel when a new one is needed. In the daemon, and any
69 child procesees, values higher than 1024 (being bigger than FD_SETSIZE)
70 are not useable for FD_SET() [and hence select()] and overwrite the stack.
71 Assorted crashes happen.
73 JH/11 Fix use of $sender_host_name in daemon process. When used in certain
74 main-section options or in a connect ACL, the value from the first ever
75 connection was never replaced for subsequent connections. Found by
78 JH/12 Bug 2838: Fix for i32lp64 hard-align platforms. Found for SPARC Linux,
79 though only once PCRE2 was introduced: the memory accounting used under
80 debug offset allocations by an int, giving a hard trap in early startup.
81 Change to using a size_t. Debug and fix by John Paul Adrian Glaubitz.
83 JH/13 Bug 2845: Fix handling of tls_require_ciphers for OpenSSL when a value
84 with underbars is given. The write-protection of configuration introduced
85 in 4.95 trapped when normalisation was applied to an option not needing
88 JH/14 Bug 1895: TLS: Deprecate RFC 5114 Diffie-Hellman parameters.
90 JH/15 Fix a resource leak in *BSD. An off-by-one error resulted in the daemon
91 failing to close the certificates directory, every hour or any time it
94 JH/16 Debugging initiated by an ACL control now continues through into routing
95 and transport processes. Previously debugging stopped any time Exim
96 re-execs, or for processing a queued message.
98 JH/17 The "expand" debug selector now gives more detail, specifically on the
99 result of expansion operators and items.
101 JH/18 Bug 2751: Fix include_directory in redirect routers. Previously a
102 bad comparison between the option value and the name of the file to
103 be included was done, and a mismatch was wrongly identified.
104 4.88 to 4.95 are affected.
106 JH/19 Support for Berkeley DB versions 1 and 2 is withdrawn.
108 JH/20 When built with NDBM for hints DB's check for nonexistence of a name
109 supplied as the db file-pair basename. Previously, if a directory
110 path was given, for example via the autoreply "once" option, the DB
111 file.pag and file.dir files would be created in that directory's
114 JH/21 Remove the "allow_insecure_tainted_data" main config option and the
115 "taint" log_selector. These were previously deprecated.
117 JH/22 Fix static address-list lookups to properly return the matched item.
118 Previously only the domain part was returned.
120 JH/23 Bug 2864: FreeBSD: fix transport hang after 4xx/5xx response. Previously
121 the call into OpenSSL to send a TLS Close was being repeated; this
122 resulted in the library waiting for the peer's Close. If that was never
123 sent we waited forever. Fix by tracking send calls.
125 JH/24 The ${run} expansion item now expands its command string elements after
126 splitting. Previously it was before; the new ordering makes handling
127 zero-length arguments simpler. The old ordering can be obtained by
128 appending a new option "preexpand", after a comma, to the "run".
130 JH/25 Taint-check exec arguments for transport-initiated external processes.
131 Previously, tainted values could be used. This affects "pipe", "lmtp" and
132 "queryprogram" transport, transport-filter, and ETRN commands.
133 The ${run} expansion is also affected: in "preexpand" mode no part of
134 the command line may be tainted, in default mode the executable name
137 JH/26 Fix CHUNKING on a continued-transport. Previously the usabliility of
138 the the facility was not passed across execs, and only the first message
139 passed over a connection could use BDAT; any further ones using DATA.
141 JH/27 Support the PIPECONNECT facility in the smtp transport when the helo_data
142 uses $sending_ip_address and an interface is specified.
143 Previously any use of the local address in the EHLO name disabled
144 PIPECONNECT, the common case being to use the rDNS of it.
146 JH/28 OpenSSL: fix transport-required OCSP stapling verification under session
147 resumption. Previously verify failed because no certificate status is
148 passed on the wire for the restarted session. Fix by using the recorded
149 ocsp status of the stored session for the new connection.
151 JH/29 TLS resumption: the key for session lookup in the client now includes
152 more info that a server could potentially use in configuring a TLS
153 session, avoiding oferring mismatching sessions to such a server.
154 Previously only the server IP was used.
156 JH/30 Fix string_copyn() for limit greater than actual string length.
157 Previously the copied amount was the limit, which could result in a
158 overlapping memcpy for newly allocated destination soon after a
159 source string shorter than the limit. Found/investigated by KM.
161 JH/31 Bug 2886: GnuTLS: Do not free the cached creds on transport connection
162 close; it may be needed for a subsequent connection. This caused a
163 SEGV on primary-MX defer. Found/investigated by Gedalya & Andreas.
165 JH/32 Fix CHUNKING for a second message on a connection when the first was
166 rejected. Previously we did not reset the chunking-offered state, and
167 erroneously rejected the BDAT command. Investigation help from
170 JH/33 Fis ${srs_encode ...} to handle an empty sender address, now returning
171 an empty address. Previously the expansion returned an error.
173 HS/01 Bug 2855: Handle a v4mapped sender address given us by a frontending
174 proxy. Previously these were misparsed, leading to paniclog entries.
180 JH/01 Bug 1329: Fix format of Maildir-format filenames to match other mail-
181 related applications. Previously an "H" was used where available info
182 says that "M" should be, so change to match.
184 JH/02 Bug 2587: Fix pam expansion condition. Tainted values are commonly used
185 as arguments, so an implementation trying to copy these into a local
186 buffer was taking a taint-enforcement trap. Fix by using dynamically
187 created buffers. Similar fix for radius expansion condition.
189 JH/03 Bug 2586: Fix listcount expansion operator. Using tainted arguments is
190 reasonable, eg. to count headers. Fix by using dynamically created
191 buffers rather than a local. Do similar fixes for ACL actions "dcc",
192 "log_reject_target", "malware" and "spam"; the arguments are expanded
193 so could be handling tainted values.
195 JH/04 Bug 2590: Fix -bi (newaliases). A previous code rearrangement had
196 broken the (no-op) support for this sendmail command. Restore it
197 to doing nothing, silently, and returning good status.
199 JH/05 Bug 2593: Fix "vacation" in Exim filter. Previously, when a "once"
200 record path was given (or the default used) without a leading directory
201 path, an error occurred on trying to open it. Use the transport's working
204 JH/06 Bug 2594: Change the name used for certificate name checks in the smtp
205 transport. Previously it was the name on the DNS A-record; use instead
206 the head of the CNAME chain leading there (if there is one). This seems
207 to align better with RFC 6125.
209 JH/07 Bug 2597: Fix a resource leak. Using a lookup in obtaining a value for
210 smtp_accept_max_per_host allocated resources which were not released
211 when the limit was exceeded. This eventually crashed the daemon. Fix
212 by adding a release action in that path.
214 JH/08 Bug 2598: Fix verify ACL condition. The options for the condition are
215 expanded; previously using tainted values was rejected. Fix by using
216 dynamically-created buffers.
218 JH/09 Relax restrictions on ACL verify condition needing access to message
219 headers. Previously they were only permitted in data and non-smtp ACLs;
220 permit also mime, dkim, prdr quit and notquit. Applies to header-syntax,
221 not_blind, header_sender and header_names_ascii verification.
223 JH/10 Bug 2603: Fix coding of string copying to only evaluate arguments once.
224 Previously a macro used one argument twice; when called with the
225 argument as an expression having side-effects, incorrect operation
226 resulted. Use an inlineable function.
228 JH/11 Bug 2604: Fix request to cutthrough-deliver when a connection is already
229 held open for a verify callout. Previously this wan not accounted for
230 and a corrupt onward SMTP conversation resulted.
232 JH/12 Bug 2607: Fix the ${srs_encode } expansion to handle quoted local_parts.
233 Previously they were embedded naively in the constructed address; when
234 needed, strip the quoting and quote the entire local_part.
235 Also make the inbound_srs expansion condition handle quoting.
237 JH/13 Fix dsearch "subdir" filter to ignore ".". Previously only ".." was
238 excluded, not matching the documentation.
240 JH/14 Bug 2606: Fix a segfault in sqlite lookups. When no, or a bad, filename
241 was given for the sqlite_dbfile a trap resulted.
243 JH/15 Bug 2620: Fix "spam" ACL condition. Previously, tainted values for the
244 "name" argument resulted in a trap. There is no reason to disallow such;
245 this was a coding error.
247 JH/16 Bug 2615: Fix pause during message reception, on systems that have been
248 suspended/resumed. The Linux CLOCK_MONOTONIC does not account for time
249 spent suspended, ignoring the POSIX definition. Previously we assumed
250 it did and a constant offset from real time could be used as a correction.
251 Change to using the same clock source for the start-of-message and the
252 post-message next-tick-wait. Also change to using CLOCK_BOOTTIME if it
253 exists, just to get a clock slightly more aligned to reality.
255 JH/17 Bug 2295: Fix DKIM signing to always semicolon-terminate. Although the
256 RFC says it is optional some validators care. The missing char was not
257 intended but triggered by a line-wrap alignment. Discovery and fix by
258 Guillaume Outters, hacked on by JH.
260 JH/18 Bug 2617: Fix a taint trap in parse_fix_phrase(). Previously when the
261 name being quoted was tainted a trap would be taken. Fix by using
262 dynamically created buffers. The routine could have been called by a
263 rewrite with the "h" flag, by using the "-F" command-line option, or
264 by using a "name=" option on a control=submission ACL modifier.
266 JH/19 SPF: change the Authentication-Results expansion component to give
267 smtp.helo when the sender domain is empty. Previously it gave
270 JH/20 Bug 2631: ACL dnslist conditions now ignore and log any lookups returns
271 not in 127.0.0.0/8 to help in spotting list domains taken over by a
272 domain-parking registrar.
274 JH/21 Bug 2630: Fix eol-replacement string for the ${readsocket } expansion.
275 Previously when a whitespace character was specified it was not inserted
276 after removing the newline.
278 JH/22 Bug 2265: Force SNI usage for smtp transport DANE'd connections, to be
279 the domain part of the recipient address. This overrides any tls_sni
280 option set, which was previously used.
282 JH/23 Logging: with the +tls_sni log_selector, do not wrap the received SNI
285 JH/24 Bug 2634: Fix a taint trap seen on NetBSD: the testing coded for
286 is_tainted() had an off-by-one error in the overenthusiastic direction.
287 Find and fix by Gavan. Although NetBSD is not a supported platform for
288 4.94 this bug could affect other platforms.
290 PP/01 Fix default prime selection to be consistent.
291 One path used ike23 still, instead of exim.dev.20160529.3; now both
292 execution flows will use the same DH primes (currently
293 exim.dev.20160529.3).
295 JH/25 OpenSSL: Fix back-compatibility behaviour surrounding tls_certificates
296 option in smtp transport, to match the documentation. Previously
297 verification was not being done in some cases where it should have been.
299 JH/26 Bug 2646: fix a memory usage issue in ldap lookups. Previously, when more
300 than one server was defined and depending on the platform memory layout
301 details, an internal consistency trap could be hit while walking the list
304 JH/27 Bug 2648: fix the passing of an authenticator public-name through spool
305 files. The value is used by the authresults expansion item. Previously
306 if this was used in a router or transport, a crash could result.
308 JH/28 Fix spurious logging of select error. Some platforms, notably FreeBSD,
309 have a sufficient incidence of EINTR returns from select that an
310 interaction with other operations done by the main daemon loop exposed
311 a bug in the error-handling. This was benign apart from the log
314 JH/29 Bug 2675: add outgoing-interface I= element to deferred "==" log lines,
315 for consistency with delivered "=>" and failed "**" lines. While we're
316 there, handle PRX and TFO.
318 JH/30 Bug 2677: fix matching of long addresses. Since 4.93 a limit of 256 was
319 applied. This resulted, if any header-line rewrite rules were configured,
320 in a panic-log triggerable by sending a message with a long address in
321 a header. Fix by increasing the arbitrary limit to larger than a single
322 (dewrapped) 5322 header line maximum size.
324 JH/31 The ESMTP option name advertised for the SUPPORT_EARLY_PIPE build option
325 is changed from X_PIPE_CONNECT to PIPE_CONNECT. This is in line with
326 RFC 6648 which deprecates X- options in protocols as a general practice.
327 Changeover between the implementations is handled by the mechanisms
330 JH/32 Bug 2599: fix delay of delivery to a local address where there is also
331 a remote which uses callout/hold. Previously the local was queued.
333 JH/33 Fix a taint trap in the ${listextract } expansion when the source data
336 JH/34 Fix the placement of a multiple-message delivery marker in the delivery
337 log line. The asterisk is now consistently appended to the remote IP
338 (and port, if given), and will also be provided on defer and fail log
339 lines. Previously it could be placed on the local IP if that was being
340 logged, and was only provided on delivery lines.
342 JH/35 Bug 2343: Harden exim_tidydb against corrupt wait- files.
344 JH/36 Bug 2687: Fix interpretation of multiple ^ chars in a plaintext
345 authenticator client_send option. Previously the next char, after a pair
346 was collapsed, was taken verbatim (so ^^^foo became ^^foo; ^^^^foo became
347 ^^\x00foo). Fixed to get ^\x00foo and ^^foo respectively to match the
348 documentation. There is still no way to get a leading ^ immediately
349 after a NUL (ie. for the password of a PLAIN method authenticator.
351 JH/37 Enforce the expected size, for fixed-size records read from hints-DB
352 files. For bad sizes read, delete the record and whine to paniclog.
354 JH/38 When logging an AUTH failure, as server, do not include sensitive
355 information. Previously, the credentials would be included if given
356 as part of the AUTH command line and an ACL denied authentication.
358 JH/39 Bug 2691: fix $local_part_data. When the matching list element
359 referred to a file, bad data was returned. This likely also affected
362 JH/40 The gsasl authenticator now supports caching of the salted password
363 generated by the client-side implementation. This required the addition
364 of a new variable: $auth4.
366 JH/41 Fix daemon SIGHUP on FreeBSD. Previously, a named socket for IPC was
367 left undeleted; the attempt to re-create it then failed - resulting in
368 the usual "SIGHUP tp have daemon reload configuration" to not work.
369 This affected any platform not supporting "abstract" Unix-domain
370 sockets (i.e. not Linux).
372 JH/42 Bug 2693: Harden against a peer which reneges on a 452 "too many
373 recipients" response to RCPT in a later response, with a 250. The
374 previous coding assumed this would not happen, and under PIPELINING
375 would result in both lost and duplicate recipients for a message.
377 JH/43 Bug 2694: Fix weighted distribution of work to multiple spamd servers.
378 Previously the weighting was incorrectly applied. Similar fix for socks
379 proxies. Found and fixed by Heiko Schlichting.
381 JH/44 Bug 2701: Fix list-expansion of dns_ipv4_lookup. Previously, it did
382 not handle sub-lists included using the +namedlist syntax. While
383 investigating, the same found for dns_trust_aa, dns_again_means_nonexist,
384 dnssec_require_domains, dnssec_request_domains, srv_fail_domains,
387 JH/45 Use a (new) separate store pool-pair for DKIM verify working data.
388 Previously the permanent pool was used, so the sore could not be freed.
389 This meant a connection with many messages would use continually-growing
392 JH/46 Use an exponentially-increasing block size when malloc'ing store. Do it
393 per-pool so as not to waste too much space. Previously a constant size
394 was used which resulted in O(n^2) behaviour; now we get O(n log n) making
395 DOS attacks harder. The cost is wasted memory use in the larger blocks.
397 JH/47 Use explicit alloc/free for DNS lookup workspace. This permits using the
398 same space repeatedly, and a smaller process footprint.
400 JH/48 Use a less bogus-looking filename for a temporary used for DH-parameters
401 for GnuTLS. Previously the name started "%s" which, while not a bug,
402 looked as if if might be one.
404 JH/49 Bug 2710: when using SOCKS for additional messages after the first (a
405 "continued connection") make the $proxy_* variables available. Previously
406 the information was not passed across the exec() call for subsequent
407 transport executions. This also mean that the log lines for the
408 messages can show the proxy information.
410 JH/50 Bug 2672: QT elements in log lines, unless disabled, now exclude the
411 receive time. With modern systems the difference is significant.
412 The historical behaviour can be restored by disabling (a new) log_selector
413 "queue_time_exclusive".
415 JH/51 Taint-check ACL line. Previously, only filenames (for out-of-line ACL
416 content) were specifically tested for. Now, also cover expansions
417 resulting in ACL names and inline ACL content.
419 JH/52 Fix ${ip6norm:} operator. Previously, any trailing line text was dropped,
420 making it unusable in complex expressions.
422 JH/53 Bug 2743: fix immediate-delivery via named queue. Previously this would
423 fail with a taint-check on the spoolfile name, and leave the message
426 HS/01 Enforce absolute PID file path name.
428 HS/02 Handle SIGINT as we handle SIGTERM: terminate the Exim process.
430 PP/01 Add a too-many-bad-recipients guard to the default config's RCPT ACL.
432 PP/02 Bug 2643: Correct TLS DH constants.
433 A missing NUL termination in our code-generation tool had led to some
434 incorrect Diffie-Hellman constants in the Exim source.
435 Reported by kylon94, code-gen tool fix by Simon Arlott.
437 PP/03 Impose security length checks on various command-line options.
438 Fixes CVE-2020-SPRSS reported by Qualys.
440 PP/04 Fix Linux security issue CVE-2020-SLCWD and guard against PATH_MAX
441 better. Reported by Qualys.
443 PP/05 Fix security issue CVE-2020-PFPSN and guard against cmdline invoker
444 providing a particularly obnoxious sender full name.
447 PP/06 Fix CVE-2020-28016 (PFPZA): Heap out-of-bounds write in parse_fix_phrase()
449 PP/07 Refuse to allocate too little memory, block negative/zero allocations.
452 PP/08 Change default for recipients_max from unlimited to 50,000.
454 PP/09 Fix security issue with too many recipients on a message (to remove a
455 known security problem if someone does set recipients_max to unlimited,
456 or if local additions add to the recipient list).
457 Fixes CVE-2020-RCPTL reported by Qualys.
459 PP/10 Fix security issue in SMTP verb option parsing
460 Fixes CVE-2020-EXOPT reported by Qualys.
462 PP/11 Fix security issue in BDAT state confusion.
463 Ensure we reset known-good where we know we need to not be reading BDAT
464 data, as a general case fix, and move the places where we switch to BDAT
465 mode until after various protocol state checks.
466 Fixes CVE-2020-BDATA reported by Qualys.
468 HS/03 Die on "/../" in msglog file names
470 QS/01 Creation of (database) files in $spool_dir: only uid=0 or the uid of
471 the Exim runtime user are allowed to create files.
473 QS/02 PID file creation/deletion: only possible if uid=0 or uid is the Exim
476 QS/03 When reading the output from interpreted forward files we do not
477 pass the pipe between the parent and the interpreting process to
478 executed child processes (if any).
480 QS/04 Always die if requested from internal logging, even is logging is
483 JH/54 DMARC: recent versions of the OpenDMARC library appear to have broken
484 the API; compilation noo longer completes with DMARC support included.
485 This affects 1.4.1-1 on Fedora 33 (1.3.2-3 is functional); and has
486 been reported on other platforms.
488 JH/55 TLS: as server, reject connections with ALPN indicating non-smtp use.
490 JH/56 Make the majority of info read from config files readonly, for defence-in-
491 depth against exploits. Suggestion by Qualys.
492 Not supported on Solaris 10.
494 JH/57 Fix control=fakreject for a custom message containing tainted data.
495 Previously this resulted in a log complaint, due to a re-expansion present
496 since fakereject was originally introduced.
498 JH/58 GnuTLS: Fix certextract expansion. If a second modifier after a tag
499 modifier was given, a loop resulted.
501 JH/59 DKIM: Fix small-message verification under TLS with chunking. If a
502 pipelined SMTP command followed the BDAT LAST then it would be
503 incorrectly treated as part of the message body, causing a verification
506 JH/60 Bug 2805: Fix logging of domain-literals in Message_ID: headers. They
507 require looser validation rules than those for 821-level addresses,
508 which only permit IP addresses.
514 JH/01 Avoid costly startup code when not strictly needed. This reduces time
515 for some exim process initialisations. It does mean that the logging
516 of TLS configuration problems is only done for the daemon startup.
518 JH/02 Early-pipelining support code is now included unless disabled in Makefile.
520 JH/03 DKIM verification defaults no long accept sha1 hashes, to conform to
521 RFC 8301. They can still be enabled, using the dkim_verify_hashes main
524 JH/04 Support CHUNKING from an smtp transport using a transport_filter, when
525 DKIM signing is being done. Previously a transport_filter would always
526 disable CHUNKING, falling back to traditional DATA.
528 JH/05 Regard command-line recipients as tainted.
530 JH/06 Bug 340: Remove the daemon pid file on exit, when due to SIGTERM.
532 JH/07 Bug 2489: Fix crash in the "pam" expansion condition. It seems that the
533 PAM library frees one of the arguments given to it, despite the
534 documentation. Therefore a plain malloc must be used.
536 JH/08 Bug 2491: Use tainted buffers for the transport smtp context. Previously
537 on-stack buffers were used, resulting in a taint trap when DSN information
538 copied from a received message was written into the buffer.
540 JH/09 Bug 2493: Harden ARC verify against Outlook, whick has been seen to mix
541 the ordering of its ARC headers. This caused a crash.
543 JH/10 Bug 2492: Use tainted memory for retry record when needed. Previously when
544 a new record was being constructed with information from the peer, a trap
547 JH/11 Bug 2494: Unset the default for dmarc_tld_file. Previously a naiive
548 installation would get error messages from DMARC verify, when it hit the
549 nonexistent file indicated by the default. Distros wanting DMARC enabled
550 should both provide the file and set the option.
551 Also enforce no DMARC verification for command-line sourced messages.
553 JH/12 Fix an uninitialised flag in early-pipelining. Previously connections
554 could, depending on the platform, hang at the STARTTLS response.
556 JH/13 Bug 2498: Reset a counter used for ARC verify before handling another
557 message on a connection. Previously if one message had ARC headers and
558 the following one did not, a crash could result when adding an
559 Authentication-Results: header.
561 JH/14 Bug 2500: Rewind some of the common-coding in string handling between the
562 Exim main code and Exim-related utities. The introduction of taint
563 tracking also did many adjustments to string handling. Since then, eximon
564 frequently terminated with an assert failure.
566 JH/15 When PIPELINING, synch after every hundred or so RCPT commands sent and
567 check for 452 responses. This slightly helps the inefficieny of doing
568 a large alias-expansion into a recipient-limited target. The max_rcpt
569 transport option still applies (and at the current default, will override
570 the new feature). The check is done for either cause of synch, and forces
571 a fast-retry of all 452'd recipients using a new MAIL FROM on the same
572 connection. The new facility is not tunable at this time.
574 JH/16 Fix the variables set by the gsasl authenticator. Previously a pointer to
575 library live data was being used, so the results became garbage. Make
576 copies while it is still usable.
578 JH/17 Logging: when the deliver_time selector ise set, include the DT= field
579 on delivery deferred (==) and failed (**) lines (if a delivery was
580 attemtped). Previously it was only on completion (=>) lines.
582 JH/18 Authentication: the gsasl driver not provides the $authN variables in time
583 for the expansion of the server_scram_iter and server_scram_salt options.
585 WB/01 SPF: DNS lookups for the obsolete SPF RR type done by the libspf2 library
586 are now specifically given a NO_DATA response without hitting the system
587 resolver. The library goes on to do the now-standard TXT lookup.
588 Use of dnsdb lookups is not affected.
590 JH/19 Bug 2507: Modules: on handling a dynamic-module (lookups) open failure,
591 only retrieve the errormessage once. Previously two calls to dlerror()
592 were used, and the second one (for mainlog/paniclog) retrieved null
595 JH/20 Taint checking: disallow use of tainted data for
596 - the appendfile transport file and directory options
597 - the pipe transport command
598 - the autoreply transport file, log and once options
599 - file names used by the redirect router (including filter files)
601 - paths used by single-key lookups
602 Previously this was permitted.
604 JH/21 Bug 2501: Fix init call in the heimdal authenticator. Previously it
605 adjusted the size of a major service buffer; this failed because the
606 buffer was in use at the time. Change to a compile-time increase in the
607 buffer size, when this authenticator is compiled into exim.
609 JH/22 Taint-checking: move to safe-mode taint checking on all platforms. The
610 previous fast-mode was untenable in the face of glibs using mmap to
611 support larger malloc requests.
613 PP/01 Update the openssl_options possible values through OpenSSL 1.1.1c.
614 New values supported, if defined on system where compiled:
615 allow_no_dhe_kex, cryptopro_tlsext_bug, enable_middlebox_compat,
616 no_anti_replay, no_encrypt_then_mac, prioritize_chacha, tlsext_padding
618 JH/23 Performance improvement in the initial phase of a two-pass queue run. By
619 running a limited number of proceses in parallel, a benefit is gained. The
620 amount varies with the platform hardware and load. The use of the option
621 queue_run_in_order means we cannot do this, as ordering becomes
624 JH/24 Bug 2524: fix the cyrus_sasl auth driver gssapi usage. A previous fix
625 had introduced a string-copy (for ensuring NUL-termination) which was not
626 appropriate for that case, which can include embedded NUL bytes in the
627 block of data. Investigation showed the copy to actually be needless, the
628 data being length-specified.
630 JH/25 Fix use of concurrent TLS connections under GnuTLS. When a callout was
631 done during a receiving connection, and both used TLS, global info was
632 used rather than per-connection info for tracking the state of data
633 queued for transmission. This could result in a connection hang.
635 JH/26 Fix use of the SIZE parameter on MAIL commands, on continued connections.
636 Previously, when delivering serveral messages down a single connection
637 only the first would provide a SIZE. This was due to the size information
638 not being properly tracked.
640 JH/27 Bug 2530: When operating in a timezone with sub-minute offset, such as
641 TAI (at 37 seconds currently), pretend to be in UTC for time-related
642 expansion and logging. Previously, spurious values such as a future
643 minute could be seen.
645 JH/28 Bug 2533: Fix expansion of ${tr } item. When called in some situations
646 it could crash from a null-deref. This could also affect the
647 ${addresses: } operator and ${readsock } item.
649 JH/29 Bug 2537: Fix $mime_part_count. When a single connection had a non-mime
650 message following a mime one, the variable was not reset.
652 JH/30 When an pipelined-connect fails at the first response, assume incorrect
653 cached capability (perhaps the peer reneged?) and immediately retry in
656 JH/31 Fix spurious detection of timeout while writing to transport filter.
658 JH/32 Bug 2541: Fix segfault on bad cmdline -f (sender) argument. Previously
659 an attempt to copy the string was made before checking it.
661 JH/33 Fix the dsearch lookup to return an untainted result. Previously the
662 taint of the lookup key was maintained; we now regard the presence in the
663 filesystem as sufficient validation.
665 JH/34 Fix the readsocket expansion to not segfault when an empty "options"
666 argument is supplied.
668 JH/35 The dsearch lookup now requires that the directory is an absolute path.
669 Previously this was not checked, and nonempty relative paths made an
670 access under Exim's current working directory.
672 JH/36 Bug 2554: Fix msg:defer event for the hosts_max_try_hardlimit case.
673 Previously no event was raised.
675 JH/37 Bug 2552: Fix the check on spool space during reception to use the SIZE
676 parameter supplied by the sender MAIL FROM command. Previously it was
677 ignored, and only the check_spool_space option value for the required
680 JH/38 Fix $dkim_key_length. This should, after a DKIM verification, present
681 the size of the signing public-key. Previously it was instead giving
682 the size of the signature hash.
684 JH/39 DKIM verification: the RFC 8301 restriction on sizes of RSA keys is now
685 the default. See the (new) dkim_verify_min_keysizes option.
687 JH/40 Fix a memory-handling bug: when a connection carried multiple messages
688 and an ACL use a lookup for checking either the local_part or domain,
689 stale data could be accessed. Ensure that variable references are
690 dropped between messages.
692 JH/41 Bug 2571: Fix SPA authenticator. Running as a server, an offset supplied
693 by the client was not checked as pointing within response data before
694 being used. A malicious client could thus cause an out-of-bounds read and
695 possibly gain authentication. Fix by adding the check.
697 JH/42 Internationalisation: change the default for downconversion in the smtp
698 transport to be "if needed". Previously it was "as previously set" for
699 the message, which usually meant "if needed" for message-submission but
700 "no" for everything else. However, MTAs have been seen using SMTPUTF8
701 even when the envelope addresses did not need it, resulting in forwarding
702 failures to non-supporting MTAs. A downconvert in such cases will be
703 a no-op on the addresses, merely dropping the use of SMTPUTF8 by the
704 transport. The change does mean that addresses needing conversion will
705 be converted when previously a delivery failure would occur.
707 JH/43 Fix possible long line in DSN. Previously when a very long SMTP error
708 response was received it would be used unchecked in a fail-DSN, violating
709 standards on line-length limits. Truncate if needed.
711 HS/01 Remove parameters of the link to www.open-spf.org. The linked form
712 doesn't work. (Additionally add a new main config option to configure the
719 JH/01 OpenSSL: With debug enabled output keying information sufficient, server
720 side, to decode a TLS 1.3 packet capture.
722 JH/02 OpenSSL: Suppress the sending of (stateful) TLS1.3 session tickets.
723 Previously the default library behaviour applied, sending two, each in
726 JH/03 Debug output for ACL now gives the config file name and line number for
729 JH/04 The default received_header_text now uses the RFC 8314 tls cipher clause.
731 JH/05 DKIM: ensure that dkim_domain elements are lowercased before use.
733 JH/06 Fix buggy handling of autoreply bounce_return_size_limit, and a possible
734 buffer overrun for (non-chunking) other transports.
736 JH/07 GnuTLS: Our use of late (post-handshake) certificate verification, under
737 TLS1.3, means that a server rejecting a client certificate is not visible
738 to the client until the first read of encrypted data (typically the
739 response to EHLO). Add detection for that case and treat it as a failed
740 TLS connection attempt, so that the normal retry-in-clear can work (if
741 suitably configured).
743 JB/01 Bug 2375: fix expansions of 822 addresses having comments in local-part
744 and/or domain. Found and fixed by Jason Betts.
746 JH/08 Add hardening against SRV & TLSA lookups the hit CNAMEs (a nonvalid
747 configuration). If a CNAME target was not a wellformed name pattern, a
750 JH/09 Logging: Fix initial listening-on line for multiple ports for an IP when
751 the OS reports them interleaved with other addresses.
753 JH/10 OpenSSL: Fix aggregation of messages. Previously, when PIPELINING was
754 used both for input and for a verify callout, both encrypted, SMTP
755 responses being sent by the server could be lost. This resulted in
756 dropped connections and sometimes bounces generated by a peer sending
759 JH/11 Harden plaintext authenticator against a badly misconfigured client-send
760 string. Previously it was possible to cause undefined behaviour in a
761 library routine (usually a crash). Found by "zerons".
763 JH/12 Bug 2384: fix "-bP smtp_receive_timeout". Previously it returned no
766 JH/13 Bug 2386: Fix builds with Dane under LibreSSL 2.9.0 onward. Some old
767 API was removed, so update to use the newer ones.
769 JH/14 Bug 1891: Close the log file if receiving a non-smtp message, without
770 any timeout set, is taking a long time. Previously we would hang on to a
771 rotated logfile "forever" if the input was arriving with long gaps
772 (a previous attempt to fix addressed lack, for a long time, of initial
775 HS/01 Bug 2390: Use message_id for tempfile creation to avoid races in a
776 shared (NFS) environment. The length of the tempfile name is now
777 4 + 16 ("hdr.$message_exim_id") which might break on file
778 systems which restrict the file name length to lower values.
781 HS/02 Bug 2390: Use message_id for tempfile creation to avoid races in a
782 shared (NFS) environment.
784 HS/03 Bug 2392: exigrep does case sensitive *option* processing (as it
785 did for all versions <4.90). Notably -M, -m, --invert, -I may be
788 JH/15 Use unsigned when creating bitmasks in macros, to avoid build errors
789 on some platforms for bit 31.
791 JH/16 GnuTLS: rework ciphersuite strings under recent library versions. Thanks
792 to changes apparently associated with TLS1.3 handling some of the APIs
793 previously used were either nonfunctional or inappropriate. Strings
794 like TLS1.3:ECDHE_SECP256R1__RSA_PSS_RSAE_SHA256__AES_256_GCM__AEAD:256
795 and TLS1.2:ECDHE_SECP256R1__RSA_SHA256__AES_128_CBC__SHA256:128 replace
796 the previous TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256 .
797 This affects log line X= elements, the $tls_{in,out}_cipher variables,
798 and the use of specific cipher names in the encrypted= ACL condition.
800 JH/17 OpenSSL: the default openssl_options now disables ssl_v3.
802 JH/18 GnuTLS: fix $tls_out_ocsp under hosts_request_ocsp. Previously the
803 verification result was not updated unless hosts_require_ocsp applied.
805 JH/19 Bug 2398: fix listing of a named-queue. Previously, even with the option
806 queue_list_requires_admin set to false, non-admin users were denied the
809 JH/20 Bug 2389: fix server advertising of usable certificates, under GnuTLS in
810 directory-of-certs mode. Previously they were advertised despite the
813 JH/21 The smtp transport option "hosts_noproxy_tls" is now unset by default.
814 A single TCP connection by a client will now hold a TLS connection open
815 for multiple message deliveries, by default. Previously the default was to
818 JH/22 The smtp transport option "hosts_try_dane" now enables all hosts by
819 default. If built with the facility, DANE will be used. The facility
820 SUPPORT_DANE is now enabled in the prototype build Makefile "EDITME".
822 JH/23 The build default is now for TLS to be included; the SUPPORT_TLS define
823 is replaced with DISABLE_TLS. Either USE_GNUTLS or (the new) USE_OPENSSL
824 must be defined and you must still, unless you define DISABLE_TLS, manage
825 the the include-dir and library-file requirements that go with that
826 choice. Non-TLS builds are still supported.
828 JH/24 Fix duplicated logging of peer name/address, on a transport connection-
831 JH/25 The smtp transport option "hosts_try_fastopen" now enables all hosts by
832 default. If the platform supports and has the facility enabled, it will
833 be requested on all coneections.
835 JH/26 The PIPE_CONNECT facility is promoted from experimental status and is now
836 controlled by the build-time option SUPPORT_PIPE_CONNECT.
838 PP/01 Unbreak heimdal_gssapi, broken in 4.92.
840 JH/27 Bug 2404: Use the main-section configuration option "dsn_from" for
841 success-DSN messages. Previously the From: header was always the default
842 one for these; the option was ignored.
844 JH/28 Fix the timeout on smtp response to apply to the whole response.
845 Previously it was reset for every read, so a teergrubing peer sending
846 single bytes within the time limit could extend the connection for a
847 long time. Credit to Qualsys Security Advisory Team for the discovery.
849 JH/29 Fix DSN Final-Recipient: field. Previously it was the post-routing
850 delivery address, which leaked information of the results of local
851 forwarding. Change to the original envelope recipient address, per
854 JH/30 Bug 2411: Fix DSN generation when RFC 3461 failure notification is
855 requested. Previously not bounce was generated and a log entry of
856 error ignored was made.
858 JH/31 Avoid re-expansion in ${sort } expansion. (CVE-2019-13917)
860 JH/32 Introduce a general tainting mechanism for values read from the input
861 channel, and values derived from them. Refuse to expand any tainted
862 values, to catch one form of exploit.
864 JH/33 Bug 2413: Fix dkim_strict option. Previously the expansion result
865 was unused and the unexpanded text used for the test. Found and
866 fixed by Ruben Jenster.
868 JH/34 Fix crash after TLS shutdown. When the TCP/SMTP channel was left open,
869 an attempt to use a TLS library read routine dereffed a nul pointer,
872 JH/35 Bug 2409: filter out-of-spec chars from callout response before using
873 them in our smtp response.
875 JH/36 Have the general router option retry_use_local_part default to true when
876 any of the restrictive preconditions are set (to anything). Previously it
877 was only for check_local user. The change removes one item of manual
878 configuration which is required for proper retries when a remote router
879 handles a subset of addresses for a domain.
881 JH/37 Appendfile: when evaluating quota use (non-quota_size_regex) take the file
882 link count into consideration.
884 HS/04 Fix handling of very log lines in -H files. If a -<key> <value> line
885 caused the extension of big_buffer, the following lines were ignored.
887 JH/38 Bug 1395: Teach the DNS negative-cache about TTL value from the SOA in
888 accordance with RFC 2308. Previously there was no expiry, so a longlived
889 receive process (eg. due to ACL delays) versus a short SOA value could
892 HS/05 Handle trailing backslash gracefully. (CVE-2019-15846)
894 JH/39 Promote DMARC support to mainline.
896 JH/40 Bug 2452: Add a References: header to DSNs.
898 JH/41 With GnuTLS 3.6.0 (and later) do not attempt to manage Diffie-Hellman
899 parameters. The relevant library call is documented as "Deprecated: This
900 function is unnecessary and discouraged on GnuTLS 3.6.0 or later. Since
901 3.6.0, DH parameters are negotiated following RFC7919."
903 HS/06 Change the default of dnssec_request_domains to "*"
905 JH/42 Bug 2545: Fix CHUNKING for all RCPT commands rejected. Previously we
906 carried on and emitted a BDAT command, even when PIPELINING was not
909 JH/43 Bug 2465: Fix taint-handling in dsearch lookup. Previously a nontainted
910 buffer was used for the filename, resulting in a trap when tainted
911 arguments (eg. $domain) were used.
913 JH/44 With OpenSSL 1.1.1 (onwards) disable renegotiation for TLS1.2 and below;
914 recommended to avoid a possible server-load attack. The feature can be
915 re-enabled via the openssl_options main cofiguration option.
917 JH/45 local_scan API: documented the current smtp_printf() call. This changed
918 for version 4.90 - adding a "more data" boolean to the arguments.
919 Bumped the ABI version number also, this having been missed previously;
920 release versions 4.90 to 4.92.3 inclusive were effectively broken in
921 respect of usage of smtp_printf() by either local_scan code or libraries
922 accessed via the ${dlfunc } expansion item. Both will need coding
923 adjustment for any calls to smtp_printf() to match the new function
924 signature; a FALSE value for the new argument is always safe.
926 JH/46 FreeBSD: fix use of the sendfile() syscall. The shim was not updating
927 the file-offset (which the Linux syscall does, and exim expects); this
928 resulted in an indefinite loop.
930 JH/47 ARC: fix crash in signing, triggered when a configuration error failed
931 to do ARC verification. The Authentication-Results: header line added
932 by the configuration then had no ARC item.
934 JH/48 Bug 2784: fix shutdown=no in the ${readsocket) expansion item. Previously
935 an incorrect mode was used for reading the result, resulting in it being
942 JH/01 Remove code calling the customisable local_scan function, unless a new
943 definition "HAVE_LOCAL_SCAN=yes" is present in the Local/Makefile.
945 JH/02 Bug 1007: Avoid doing logging from signal-handlers, as that can result in
946 non-signal-safe functions being used.
948 JH/03 Bug 2269: When presented with a received message having a stupidly large
949 number of DKIM-Signature headers, disable DKIM verification to avoid
950 a resource-consumption attack. The limit is set at twenty.
952 JH/04 Add variables $arc_domains, $arc_oldest_pass for ARC verify. Fix the
953 report of oldest_pass in ${authres } in consequence, and separate out
954 some descriptions of reasons for verification fail.
956 JH/05 Bug 2273: Cutthrough delivery left a window where the received messsage
957 files in the spool were present and unlocked. A queue-runner could spot
958 them, resulting in a duplicate delivery. Fix that by doing the unlock
959 after the unlink. Investigation by Tim Stewart. Take the opportunity to
960 add more error-checking on spoolfile handling while that code is being
963 PP/01 Refuse to open a spool data file (*-D) if it's a symlink.
964 No known attacks, no CVE, this is defensive hardening.
966 JH/06 Bug 2275: The MIME ACL unlocked the received message files early, and
967 a queue-runner could start a delivery while other operations were ongoing.
968 Cutthrough delivery was a common victim, resulting in duplicate delivery.
969 Found and investigated by Tim Stewart. Fix by using the open message data
970 file handle rather than opening another, and not locally closing it (which
971 releases a lock) for that case, while creating the temporary .eml format
972 file for the MIME ACL. Also applies to "regex" and "spam" ACL conditions.
974 JH/07 Bug 177: Make a random-recipient callout success visible in ACL, by setting
975 $sender_verify_failure/$recipient_verify_failure to "random".
977 JH/08 When generating a selfsigned cert, use serial number 1 since zero is not
980 JH/09 Bug 2274: Fix logging of cmdline args when starting in an unlinked cwd.
981 Previously this would segfault.
983 JH/10 Fix ARC signing for case when DKIM signing failed. Previously this would
986 JH/11 Bug 2264: Exim now only follows CNAME chains one step by default. We'd
987 like zero, since the resolver should be doing this for us, But we need one
988 as a CNAME but no MX presence gets the CNAME returned; we need to check
989 that doesn't point to an MX to declare it "no MX returned" rather than
990 "error, loop". A new main option is added so the older capability of
991 following some limited number of chain links is maintained.
993 JH/12 Add client-ip info to non-pass iprev ${authres } lines.
995 JH/13 For receent Openssl versions (1.1 onward) use modern generic protocol
996 methods. These should support TLS 1.3; they arrived with TLS 1.3 and the
997 now-deprecated earlier definitions used only specified the range up to TLS
998 1.2 (in the older-version library docs).
1000 JH/14 Bug 2284: Fix DKIM signing for body lines starting with a pair of dots.
1002 JH/15 Rework TLS client-side context management. Stop using a global, and
1003 explicitly pass a context around. This enables future use of TLS for
1004 connections to service-daemons (eg. malware scanning) while a client smtp
1005 connection is using TLS; with cutthrough connections this is quite likely.
1007 JH/16 Fix ARC verification to do AS checks in reverse order.
1009 JH/17 Support a "tls" option on the ${readsocket } expansion item.
1011 JH/18 Bug 2287: Fix the protocol name (eg utf8esmtp) for multiple messages
1012 using the SMTPUTF8 option on their MAIL FROM commands, in one connection.
1013 Previously the "utf8" would be re-prepended for every additional message.
1015 JH/19 Reject MAIL FROM commands with SMTPUTF8 when the facility was not advertised.
1016 Previously thery were accepted, resulting in issues when attempting to
1017 forward messages to a non-supporting MTA.
1019 PP/02 Let -n work with printing macros too, not just options.
1021 JH/20 Bug 2296: Fix cutthrough for >1 address redirection. Previously only
1022 one parent address was copied, and bogus data was used at delivery-logging
1023 time. Either a crash (after delivery) or bogus log data could result.
1024 Discovery and analysis by Tim Stewart.
1026 PP/03 Make ${utf8clean:} expansion operator detect incomplete final character.
1027 Previously if the string ended mid-character, we did not insert the
1028 promised '?' replacement.
1030 PP/04 Documentation: current string operators work on bytes, not codepoints.
1032 JH/21 Change as many as possible of the global flags into one-bit bitfields; these
1033 should pack well giving a smaller memory footprint so better caching and
1034 therefore performance. Group the declarations where this can't be done so
1035 that the byte-sized flag variables are not interspersed among pointer
1036 variables, giving a better chance of good packing by the compiler.
1038 JH/22 Bug 1896: Fix the envelope from for DMARC forensic reports to be possibly
1039 non-null, to avoid issues with sites running BATV. Previously reports were
1040 sent with an empty envelope sender so looked like bounces.
1042 JH/23 Bug 2318: Fix the noerror command within filters. It wasn't working.
1043 The ignore_error flag wasn't being returned from the filter subprocess so
1044 was not set for later routers. Investigation and fix by Matthias Kurz.
1046 JH/24 Bug 2310: Raise a msg:fail:internal event for each undelivered recipient,
1047 and a msg:complete for the whole, when a message is manually removed using
1048 -Mrm. Developement by Matthias Kurz, hacked on by JH.
1050 JH/25 Avoid fixed-size buffers for pathnames in DB access. This required using
1051 a "Gnu special" function, asprintf() in the DB utility binary builds; I
1052 hope that is portable enough.
1054 JH/26 Bug 2311: Fix DANE-TA verification under GnuTLS. Previously it was also
1055 requiring a known-CA anchor certificate; make it now rely entirely on the
1056 TLSA as an anchor. Checking the name on the leaf cert against the name
1057 on the A-record for the host is still done for TA (but not for EE mode).
1059 JH/27 Fix logging of proxy address. Previously, a pointless "PRX=[]:0" would be
1060 included in delivery lines for non-proxied connections, when compiled with
1061 SUPPORT_SOCKS and running with proxy logging enabled.
1063 JH/28 Bug 2314: Fire msg:fail:delivery event even when error is being ignored.
1064 Developement by Matthias Kurz, tweaked by JH. While in that bit of code,
1065 move the existing event to fire before the normal logging of message
1066 failure so that custom logging is bracketed by normal logging.
1068 JH/29 Bug 2322: A "fail" command in a non-system filter (file) now fires the
1069 msg:fail:internal event. Developement by Matthias Kurz.
1071 JH/30 Bug 2329: Increase buffer size used for dns lookup from 2k, which was
1072 far too small for todays use of crypto signatures stored there. Go all
1073 the way to the max DNS message size of 64kB, even though this might be
1074 overmuch for IOT constrained device use.
1076 JH/31 Fix a bad use of a copy function, which could be used to pointlessly
1077 copy a string over itself. The library routine is documented as not
1078 supporting overlapping copies, and on MacOS it actually raised a SIGABRT.
1080 JH/32 For main options check_spool_space and check_inode_space, where the
1081 platform supports 64b integers, support more than the previous 2^31 kB
1082 (i.e. more than 2 TB). Accept E, P and T multipliers in addition to
1083 the previous G, M, k.
1085 JH/33 Bug 2338: Fix the cyrus-sasl authenticator to fill in the
1086 $authenticated_fail_id variable on authentication failure. Previously
1089 JH/34 Increase RSA keysize of autogen selfsign cert from 1024 to 2048. RHEL 8.0
1090 OpenSSL didn't want to use such a weak key. Do for GnuTLS also, and for
1091 more-modern GnuTLS move from GNUTLS_SEC_PARAM_LOW to
1092 GNUTLS_SEC_PARAM_MEDIUM.
1094 JH/35 OpenSSL: fail the handshake when SNI processing hits a problem, server
1095 side. Previously we would continue as if no SNI had been received.
1097 JH/36 Harden the handling of string-lists. When a list consisted of a sole
1098 "<" character, which should be a list-separator specification, we walked
1099 off past the nul-terimation.
1101 JH/37 Bug 2341: Send "message delayed" warning MDNs (restricted to external
1102 causes) even when the retry time is not yet met. Previously they were
1103 not, meaning that when (say) an account was over-quota and temp-rejecting,
1104 and multiple senders' messages were queued, only one sender would get
1105 notified on each configured delay_warning cycle.
1107 JH/38 Bug 2351: Log failures to extract envelope addresses from message headers.
1109 JH/39 OpenSSL: clear the error stack after an SSL_accept(). With anon-auth
1110 cipher-suites, an error can be left on the stack even for a succeeding
1111 accept; this results in impossible error messages when a later operation
1114 AM/01 Bug 2359: GnuTLS: repeat lowlevel read and write operations while they
1115 return error codes indicating retry. Under TLS1.3 this becomes required.
1117 JH/40 Fix the feature-cache refresh for EXPERIMENTAL_PIPE_CONNECT. Previously
1118 it only wrote the new authenticators, resulting in a lack of tracking of
1119 peer changes of ESMTP extensions until the next cache flush.
1121 JH/41 Fix the loop reading a message header line to check for integer overflow,
1122 and more-often against header_maxsize. Previously a crafted message could
1123 induce a crash of the recive process; now the message is cleanly rejected.
1125 JH/42 Bug 2366: Fix the behaviour of the dkim_verify_signers option. It had
1126 been totally disabled for all of 4.91. Discovery and fix by "Mad Alex".
1132 GF/01 DEFER rather than ERROR on redis cluster MOVED response.
1133 When redis_servers is set to a list of > 1 element, and the Redis servers
1134 in that list are in cluster configuration, convert the REDIS_REPLY_ERROR
1135 case of MOVED into a DEFER case instead, thus moving the query onto the
1136 next server in the list. For a cluster of N elements, all N servers must
1137 be defined in redis_servers.
1139 GF/02 Catch and remove uninitialized value warning in exiqsumm
1140 Check for existence of @ARGV before looking at $ARGV[0]
1142 JH/01 Replace the store_release() internal interface with store_newblock(),
1143 which internalises the check required to safely use the old one, plus
1144 the allocate and data copy operations duplicated in both (!) of the
1145 extant use locations.
1147 JH/02 Disallow '/' characters in queue names specified for the "queue=" ACL
1148 modifier. This matches the restriction on the commandline.
1150 JH/03 Fix pgsql lookup for multiple result-tuples with a single column.
1151 Previously only the last row was returned.
1153 JH/04 Bug 2217: Tighten up the parsing of DKIM signature headers. Previously
1154 we assumed that tags in the header were well-formed, and parsed the
1155 element content after inspecting only the first char of the tag.
1156 Assumptions at that stage could crash the receive process on malformed
1159 JH/05 Bug 2215: Fix crash associated with dnsdb lookup done from DKIM ACL.
1160 While running the DKIM ACL we operate on the Permanent memory pool so that
1161 variables created with "set" persist to the DATA ACL. Also (at any time)
1162 DNS lookups that fail create cache records using the Permanent pool. But
1163 expansions release any allocations made on the current pool - so a dnsdb
1164 lookup expansion done in the DKIM ACL releases the memory used for the
1165 DNS negative-cache, and bad things result. Solution is to switch to the
1166 Main pool for expansions.
1167 While we're in that code, add checks on the DNS cache during store_reset,
1168 active in the testsuite.
1169 Problem spotted, and debugging aided, by Wolfgang Breyha.
1171 JH/06 Fix issue with continued-connections when the DNS shifts unreliably.
1172 When none of the hosts presented to a transport match an already-open
1173 connection, close it and proceed with the list. Previously we would
1174 queue the message. Spotted by Lena with Yahoo, probably involving
1177 JH/07 Bug 2214: Fix SMTP responses resulting from non-accept result of MIME ACL.
1178 Previously a spurious "250 OK id=" response was appended to the proper
1181 JH/08 The "support for" informational output now, which built with Content
1182 Scanning support, has a line for the malware scanner interfaces compiled
1183 in. Interface can be individually included or not at build time.
1185 JH/09 The "aveserver", "kavdaemon" and "mksd" interfaces are now not included
1186 by the template makefile "src/EDITME". The "STREAM" support for an older
1187 ClamAV interface method is removed.
1189 JH/10 Bug 2223: Fix mysql lookup returns for the no-data case (when the number of
1190 rows affected is given instead).
1192 JH/11 The runtime Berkeley DB library version is now additionally output by
1193 "exim -d -bV". Previously only the compile-time version was shown.
1195 JH/12 Bug 2230: Fix cutthrough routing for nonfirst messages in an initiating
1196 SMTP connection. Previously, when one had more recipients than the
1197 first, an abortive onward connection was made. Move to full support for
1198 multiple onward connections in sequence, handling cutthrough connection
1199 for all multi-message initiating connections.
1201 JH/13 Bug 2229: Fix cutthrough routing for nonstandard port numbers defined by
1202 routers. Previously, a multi-recipient message would fail to match the
1203 onward-connection opened for the first recipient, and cause its closure.
1205 JH/14 Bug 2174: A timeout on connect for a callout was also erroneously seen as
1206 a timeout on read on a GnuTLS initiating connection, resulting in the
1207 initiating connection being dropped. This mattered most when the callout
1208 was marked defer_ok. Fix to keep the two timeout-detection methods
1211 JH/15 Relax results from ACL control request to enable cutthrough, in
1212 unsupported situations, from error to silently (except under debug)
1213 ignoring. This covers use with PRDR, frozen messages, queue-only and
1216 HS/01 Fix Buffer overflow in base64d() (CVE-2018-6789)
1218 JH/16 Fix bug in DKIM verify: a buffer overflow could corrupt the malloc
1219 metadata, resulting in a crash in free().
1221 PP/01 Fix broken Heimdal GSSAPI authenticator integration.
1222 Broken in f2ed27cf5, missing an equals sign for specified-initialisers.
1223 Broken also in d185889f4, with init system revamp.
1225 JH/17 Bug 2113: Fix conversation closedown with the Avast malware scanner.
1226 Previously we abruptly closed the connection after reading a malware-
1227 found indication; now we go on to read the "scan ok" response line,
1230 JH/18 Bug 2239: Enforce non-usability of control=utf8_downconvert in the mail
1231 ACL. Previously, a crash would result.
1233 JH/19 Speed up macro lookups during configuration file read, by skipping non-
1234 macro text after a replacement (previously it was only once per line) and
1235 by skipping builtin macros when searching for an uppercase lead character.
1237 JH/20 DANE support moved from Experimental to mainline. The Makefile control
1238 for the build is renamed.
1240 JH/21 Fix memory leak during multi-message connections using STARTTLS. A buffer
1241 was allocated for every new TLS startup, meaning one per message. Fix
1242 by only allocating once (OpenSSL) or freeing on TLS-close (GnuTLS).
1244 JH/22 Bug 2236: When a DKIM verification result is overridden by ACL, DMARC
1245 reported the original. Fix to report (as far as possible) the ACL
1246 result replacing the original.
1248 JH/23 Fix memory leak during multi-message connections using STARTTLS under
1249 OpenSSL. Certificate information is loaded for every new TLS startup,
1250 and the resources needed to be freed.
1252 JH/24 Bug 2242: Fix exim_dbmbuild to permit directoryless filenames.
1254 JH/25 Fix utf8_downconvert propagation through a redirect router. Previously it
1257 JH/26 Bug 2253: For logging delivery lines under PRDR, append the overall
1258 DATA response info to the (existing) per-recipient response info for
1259 the "C=" log element. It can have useful tracking info from the
1260 destination system. Patch from Simon Arlott.
1262 JH/27 Bug 2251: Fix ldap lookups that return a single attribute having zero-
1263 length value. Previously this would segfault.
1265 HS/02 Support Avast multiline protoocol, this allows passing flags to
1266 newer versions of the scanner.
1268 JH/28 Ensure that variables possibly set during message acceptance are marked
1269 dead before release of memory in the daemon loop. This stops complaints
1270 about them when the debug_store option is enabled. Discovered specifically
1271 for sender_rate_period, but applies to a whole set of variables.
1272 Do the same for the queue-runner and queue-list loops, for variables set
1273 from spool message files. Do the same for the SMTP per-message loop, for
1274 certain variables indirectly set in ACL operations.
1276 JH/29 Bug 2250: Fix a longstanding bug in heavily-pipelined SMTP input (such
1277 as a multi-recipient message from a mailinglist manager). The coding had
1278 an arbitrary cutoff number of characters while checking for more input;
1279 enforced by writing a NUL into the buffer. This corrupted long / fast
1280 input. The problem was exposed more widely when more pipelineing of SMTP
1281 responses was introduced, and one Exim system was feeding another.
1282 The symptom is log complaints of SMTP syntax error (NUL chars) on the
1283 receiving system, and refused recipients seen by the sending system
1284 (propating to people being dropped from mailing lists).
1285 Discovered and pinpointed by David Carter.
1287 JH/30 The (EXPERIMENTAL_DMARC) variable $dmarc_ar_header is withdrawn, being
1288 replaced by the ${authresults } expansion.
1290 JH/31 Bug 2257: Fix pipe transport to not use a socket-only syscall.
1292 HS/03 Set a handler for SIGTERM and call exit(3) if running as PID 1. This
1293 allows proper process termination in container environments.
1295 JH/32 Bug 2258: Fix spool_wireformat in combination with LMTP transport.
1296 Previously the "final dot" had a newline after it; ensure it is CR,LF.
1298 JH/33 SPF: remove support for the "spf" ACL condition outcome values "err_temp"
1299 and "err_perm", deprecated since 4.83 when the RFC-defined words
1300 "temperror" and "permerror" were introduced.
1302 JH/34 Re-introduce enforcement of no cutthrough delivery on transports having
1303 transport-filters or DKIM-signing. The restriction was lost in the
1304 consolidation of verify-callout and delivery SMTP handling.
1305 Extend the restriction to also cover ARC-signing.
1307 JH/35 Cutthrough: for a final-dot response timeout (and nonunderstood responses)
1308 in defer=pass mode supply a 450 to the initiator. Previously the message
1311 PP/02 DANE: add dane_require_tls_ciphers SMTP Transport option; if unset,
1312 tls_require_ciphers is used as before.
1314 HS/03 Malware Avast: Better match the Avast multiline protocol. Add
1315 "pass_unscanned". Only tmpfails from the scanner are written to
1316 the paniclog, as they may require admin intervention (permission
1317 denied, license issues). Other scanner errors (like decompression
1318 bombs) do not cause a paniclog entry.
1320 JH/36 Fix reinitialisation of DKIM logging variable between messages.
1321 Previously it was possible to log spurious information in receive log
1324 JH/37 Bug 2255: Revert the disable of the OpenSSL session caching. This
1325 triggered odd behaviour from Outlook Express clients.
1327 PP/03 Add util/renew-opendmarc-tlds.sh script for safe renewal of public
1330 JH/38 DKIM: accept Ed25519 pubkeys in SubjectPublicKeyInfo-wrapped form,
1331 since the IETF WG has not yet settled on that versus the original
1332 "bare" representation.
1334 JH/39 Fix syslog logging for syslog_timestamp=no and log_selector +millisec.
1335 Previously the millisecond value corrupted the output.
1336 Fix also for syslog_pid=no and log_selector +pid, for which the pid
1337 corrupted the output.
1343 JH/01 Rework error string handling in TLS interface so that the caller in
1344 more cases is responsible for logging. This permits library-sourced
1345 string to be attached to addresses during delivery, and collapses
1346 pairs of long lines into single ones.
1348 PP/01 Allow PKG_CONFIG_PATH to be set in Local/Makefile and use it correctly
1349 during configuration. Wildcards are allowed and expanded.
1351 JH/02 Rework error string handling in DKIM to pass more info back to callers.
1352 This permits better logging.
1354 JH/03 Rework the transport continued-connection mechanism: when TLS is active,
1355 do not close it down and have the child transport start it up again on
1356 the passed-on TCP connection. Instead, proxy the child (and any
1357 subsequent ones) for TLS via a unix-domain socket channel. Logging is
1358 affected: the continued delivery log lines do not have any DNSSEC, TLS
1359 Certificate or OCSP information. TLS cipher information is still logged.
1361 JH/04 Shorten the log line for daemon startup by collapsing adjacent sets of
1362 identical IP addresses on different listening ports. Will also affect
1365 PP/02 Bug 2070: uClibc defines __GLIBC__ without providing glibc headers;
1366 add noisy ifdef guards to special-case this sillyness.
1367 Patch from Bernd Kuhls.
1369 JH/05 Tighten up the checking in isip4 (et al): dotted-quad components larger
1370 than 255 are no longer allowed.
1372 JH/06 Default openssl_options to include +no_ticket, to reduce load on peers.
1373 Disable the session-cache too, which might reduce our load. Since we
1374 currrectly use a new context for every connection, both as server and
1375 client, there is no benefit for these.
1376 GnuTLS appears to not support tickets server-side by default (we don't
1377 call gnutls_session_ticket_enable_server()) but client side is enabled
1378 by default on recent versions (3.1.3 +) unless the PFS priority string
1381 PP/03 Add $SOURCE_DATE_EPOCH support for reproducible builds, per spec at
1382 <https://reproducible-builds.org/specs/source-date-epoch/>.
1384 JH/07 Fix smtp transport use of limited max_rcpt under mua_wrapper. Previously
1385 the check for any unsuccessful recipients did not notice the limit, and
1386 erroneously found still-pending ones.
1388 JH/08 Pipeline CHUNKING command and data together, on kernels that support
1389 MSG_MORE. Only in-clear (not on TLS connections).
1391 JH/09 Avoid using a temporary file during transport using dkim. Unless a
1392 transport-filter is involved we can buffer the headers in memory for
1393 creating the signature, and read the spool data file once for the
1394 signature and again for transmission.
1396 JH/10 Enable use of sendfile in Linux builds as default. It was disabled in
1397 4.77 as the kernel support then wasn't solid, having issues in 64bit
1398 mode. Now, it's been long enough. Add support for FreeBSD also.
1400 JH/11 Bug 2104: Fix continued use of a transport connection with TLS. In the
1401 case where the routing stage had gathered several addresses to send to
1402 a host before calling the transport for the first, we previously failed
1403 to close down TLS in the old transport process before passing the TCP
1404 connection to the new process. The new one sent a STARTTLS command
1405 which naturally failed, giving a failed delivery and bloating the retry
1406 database. Investigation and fix prototype from Wolfgang Breyha.
1408 JH/12 Fix check on SMTP command input synchronisation. Previously there were
1409 false-negatives in the check that the sender had not preempted a response
1410 or prompt from Exim (running as a server), due to that code's lack of
1411 awareness of the SMTP input buffering.
1413 PP/04 Add commandline_checks_require_admin option.
1414 Exim drops privileges sanely, various checks such as -be aren't a
1415 security problem, as long as you trust local users with access to their
1416 own account. When invoked by services which pass untrusted data to
1417 Exim, this might be an issue. Set this option in main configuration
1418 AND make fixes to the calling application, such as using `--` to stop
1421 JH/13 Do pipelining under TLS. Previously, although safe, no advantage was
1422 taken. Now take care to pack both (client) MAIL,RCPT,DATA, and (server)
1423 responses to those, into a single TLS record each way (this usually means
1424 a single packet). As a side issue, smtp_enforce_sync now works on TLS
1427 PP/05 OpenSSL/1.1: use DH_bits() for more accurate DH param sizes. This
1428 affects you only if you're dancing at the edge of the param size limits.
1429 If you are, and this message makes sense to you, then: raise the
1430 configured limit or use OpenSSL 1.1. Nothing we can do for older
1433 JH/14 For the "sock" variant of the malware scanner interface, accept an empty
1434 cmdline element to get the documented default one. Previously it was
1437 JH/15 Fix a crash in the smtp transport caused when two hosts in succession
1438 are unsuable for non-message-specific reasons - eg. connection timeout,
1439 banner-time rejection.
1441 JH/16 Fix logging of delivery remote port, when specified by router, under
1444 PP/06 Repair manualroute's ability to take options in any order, even if one
1445 is the name of a transport.
1448 HS/01 Cleanup, prevent repeated use of -p/-oMr (CVE-2017-1000369)
1450 JH/17 Change the list-building routines interface to use the expanding-string
1451 triplet model, for better allocation and copying behaviour.
1453 JH/18 Prebuild the data-structure for "builtin" macros, for faster startup.
1454 Previously it was constructed the first time a possibly-matching string
1455 was met in the configuration file input during startup; now it is done
1458 JH/19 Bug 2141: Use the full-complex API for Berkeley DB rather than the legacy-
1459 compatible one, to avoid the (poorly documented) possibility of a config
1460 file in the working directory redirecting the DB files, possibly correpting
1461 some existing file. CVE-2017-10140 assigned for BDB.
1463 JH/20 Bug 2147: Do not defer for a verify-with-callout-and-random which is not
1464 cache-hot. Previously, although the result was properly cached, the
1465 initial verify call returned a defer.
1467 JH/21 Bug 2151: Avoid using SIZE on the MAIL for a callout verify, on any but
1468 the main verify for receipient in uncached-mode.
1470 JH/22 Retire historical build files to an "unsupported" subdir. These are
1471 defined as "ones for which we have no current evidence of testing".
1473 JH/23 DKIM: enforce the DNS pubkey record "h" permitted-hashes optional field,
1474 if present. Previously it was ignored.
1476 JH/24 Start using specified-initialisers in C structure init coding. This is
1477 a C99 feature (it's 2017, so now considered safe).
1479 JH/25 Use one-bit bitfields for flags in the "addr" data structure. Previously
1480 if was a fixed-sized field and bitmask ops via macros; it is now more
1483 PP/07 GitHub PR 56: Apply MariaDB build fix.
1484 Patch provided by Jaroslav Škarvada.
1486 PP/08 Bug 2161: Fix regression in sieve quoted-printable handling introduced
1487 during Coverity cleanups [4.87 JH/47]
1488 Diagnosis and fix provided by Michael Fischer v. Mollard.
1490 JH/26 Fix DKIM bug: when the pseudoheader generated for signing was exactly
1491 the right size to place the terminating semicolon on its own folded
1492 line, the header hash was calculated to an incorrect value thanks to
1493 the (relaxed) space the fold became.
1495 HS/02 Fix Bug 2130: large writes from the transport subprocess were chunked
1496 and confused the parent.
1498 JH/27 Fix SOCKS bug: an unitialized pointer was deref'd by the transport process
1499 which could crash as a result. This could lead to undeliverable messages.
1501 JH/28 Logging: "next input sent too soon" now shows where input was truncated
1504 JH/29 Fix queue_run_in_order to ignore the PID portion of the message ID. This
1505 matters on fast-turnover and PID-randomising systems, which were getting
1506 out-of-order delivery.
1508 JH/30 Fix a logging bug on aarch64: an unsafe routine was previously used for
1509 a possibly-overlapping copy. The symptom was that "Remote host closed
1510 connection in response to HELO" was logged instead of the actual 4xx
1513 JH/31 Fix CHUNKING code to properly flush the unwanted chunk after an error.
1514 Previously only that bufferd was discarded, resulting in SYMTP command
1517 JH/32 DKIM: when a message has multiple signatures matching an identity given
1518 in dkim_verify_signers, run the dkim acl once for each. Previously only
1519 one run was done. Bug 2189.
1521 JH/33 Downgrade an unfound-list name (usually a typo in the config file) from
1522 "panic the current process" to "deliberately defer". The panic log is
1523 still written with the problem list name; the mail and reject logs now
1524 get a temp-reject line for the message that was being handled, saying
1525 something like "domains check lookup or other defer". The SMTP 451
1526 message is still "Temporary local problem".
1528 JH/34 Bug 2199: Fix a use-after-free while reading smtp input for header lines.
1529 A crafted sequence of BDAT commands could result in in-use memory beeing
1530 freed. CVE-2017-16943.
1532 HS/03 Bug 2201: Fix checking for leading-dot on a line during headers reading
1533 from SMTP input. Previously it was always done; now only done for DATA
1534 and not BDAT commands. CVE-2017-16944.
1536 JH/35 Bug 2201: Flush received data in BDAT mode after detecting an error fatal
1537 to the message (such as an overlong header line). Previously this was
1538 not done and we did not exit BDAT mode. Followon from the previous item
1539 though a different problem.
1545 JH/01 Bug 1922: Support IDNA2008. This has slightly different conversion rules
1546 than -2003 did; needs libidn2 in addition to libidn.
1548 JH/02 The path option on a pipe transport is now expanded before use.
1550 PP/01 GitHub PR 50: Do not call ldap_start_tls_s on ldapi:// connections.
1551 Patch provided by "Björn", documentation fix added too.
1553 JH/03 Bug 2003: fix Proxy Protocol v2 handling: the address size field was
1554 missing a wire-to-host endian conversion.
1556 JH/04 Bug 2004: fix CHUNKING in non-PIPELINEING mode. Chunk data following
1557 close after a BDAT command line could be taken as a following command,
1558 giving a synch failure. Fix by only checking for synch immediately
1559 before acknowledging the chunk.
1561 PP/02 GitHub PR 52: many spelling fixes, which include fixing parsing of
1562 no_require_dnssec option and creation of _HAVE_TRANSPORT_APPEND_MAILDIR
1563 macro. Patches provided by Josh Soref.
1565 JH/05 Have the EHLO response advertise VRFY, if there is a vrfy ACL defined.
1566 Previously we did not; the RFC seems ambiguous and VRFY is not listed
1567 by IANA as a service extension. However, John Klensin suggests that we
1570 JH/06 Bug 2017: Fix DKIM verification in -bh test mode. The data feed into
1571 the dkim code may be unix-mode line endings rather than smtp wire-format
1572 CRLF, so prepend a CR to any bare LF.
1574 JH/07 Rationalise the coding for callout smtp conversations and transport ones.
1575 As a side-benfit, callouts can now use PIPELINING hence fewer round-trips.
1577 JH/08 Bug 2016: Fix DKIM verification vs. CHUNKING. Any BDAT commands after
1578 the first were themselves being wrongly included in the feed into dkim
1579 processing; with most chunk sizes in use this resulted in an incorrect
1580 body hash calculated value.
1582 JH/09 Bug 2014: permit inclusion of a DKIM-Signature header in a received
1583 DKIM signature block, for verification. Although advised against by
1584 standards it is specifically not ruled illegal.
1586 JH/10 Bug 2025: Fix reception of (quoted) local-parts with embedded spaces.
1588 JH/11 Bug 2029: Fix crash in DKIM verification when a message signature block is
1589 missing a body hash (the bh= tag).
1591 JH/12 Bug 2018: Re-order Proxy Protocol startup versus TLS-on-connect startup.
1592 It seems that HAProxy sends the Proxy Protocol information in clear and
1593 only then does a TLS startup, so do the same.
1595 JH/13 Bug 2027: Avoid attempting to use TCP Fast Open for non-transport client
1596 TCP connections (such as for Spamd) unless the daemon successfully set
1597 Fast Open mode on its listening sockets. This fixes breakage seen on
1598 too-old kernels or those not configured for Fast Open, at the cost of
1599 requiring both directions being enabled for TFO, and TFO never being used
1600 by non-daemon-related Exim processes.
1602 JH/14 Bug 2000: Reject messages recieved with CHUNKING but with malformed line
1603 endings, at least on the first header line. Try to canonify any that get
1604 past that check, despite the cost.
1606 JH/15 Angle-bracket nesting (an error inserted by broken sendmails) levels are
1607 now limited to an arbitrary five deep, while parsing addresses with the
1608 strip_excess_angle_brackets option enabled.
1610 PP/03 Bug 2018: For Proxy Protocol and TLS-on-connect, do not over-read and
1611 instead leave the unprompted TLS handshake in socket buffer for the
1612 TLS library to consume.
1614 PP/04 Bug 2018: Also handle Proxy Protocol v2 safely.
1616 PP/05 FreeBSD compat: handle that Ports no longer create /usr/bin/perl
1618 JH/16 Drop variables when they go out of scope. Memory management drops a whole
1619 region in one operation, for speed, and this leaves assigned pointers
1620 dangling. Add checks run only under the testsuite which checks all
1621 variables at a store-reset and panics on a dangling pointer; add code
1622 explicitly nulling out all the variables discovered. Fixes one known
1623 bug: a transport crash, where a dangling pointer for $sending_ip_address
1624 originally assigned in a verify callout, is re-used.
1626 PP/06 Drop '.' from @INC in various Perl scripts.
1628 PP/07 Switch FreeBSD iconv to always use the base-system libc functions.
1630 PP/08 Reduce a number of compilation warnings under clang; building with
1631 CC=clang CFLAGS+=-Wno-dangling-else -Wno-logical-op-parentheses
1632 should be warning-free.
1634 JH/17 Fix inbound CHUNKING when DKIM disabled at runtime.
1636 HS/01 Fix portability problems introduced by PP/08 for platforms where
1637 realloc(NULL) is not equivalent to malloc() [SunOS et al].
1639 HS/02 Bug 1974: Fix missing line terminator on the last received BDAT
1640 chunk. This allows us to accept broken chunked messages. We need a more
1641 general solution here.
1643 PP/09 Wrote util/chunking_fixqueue_finalnewlines.pl to help recover
1644 already-broken messages in the queue.
1646 JH/18 Bug 2061: Fix ${extract } corrupting an enclosing ${reduce } $value.
1648 JH/19 Fix reference counting bug in routing-generated-address tracking.
1654 JH/01 Use SIZE on MAIL FROM in a cutthrough connection, if the destination
1655 supports it and a size is available (ie. the sending peer gave us one).
1657 JH/02 The obsolete acl condition "demime" is removed (finally, after ten
1658 years of being deprecated). The replacements are the ACLs
1659 acl_smtp_mime and acl_not_smtp_mime.
1661 JH/03 Upgrade security requirements imposed for hosts_try_dane: previously
1662 a downgraded non-dane trust-anchor for the TLS connection (CA-style)
1663 or even an in-clear connection were permitted. Now, if the host lookup
1664 was dnssec and dane was requested then the host is only used if the
1665 TLSA lookup succeeds and is dnssec. Further hosts (eg. lower priority
1666 MXs) will be tried (for hosts_try_dane though not for hosts_require_dane)
1667 if one fails this test.
1668 This means that a poorly-configured remote DNS will make it incommunicado;
1669 but it protects against a DNS-interception attack on it.
1671 JH/04 Bug 1810: make continued-use of an open smtp transport connection
1672 non-noisy when a race steals the message being considered.
1674 JH/05 If main configuration option tls_certificate is unset, generate a
1675 self-signed certificate for inbound TLS connections.
1677 JH/06 Bug 165: hide more cases of password exposure - this time in expansions
1678 in rewrites and routers.
1680 JH/07 Retire gnutls_require_mac et.al. These were nonfunctional since 4.80
1681 and logged a warning sing 4.83; now they are a configuration file error.
1683 JH/08 Bug 1836: Fix crash in VRFY handling when handed an unqualified name
1684 (lacking @domain). Apply the same qualification processing as RCPT.
1686 JH/09 Bug 1804: Avoid writing msglog files when in -bh or -bhc mode.
1688 JH/10 Support ${sha256:} applied to a string (as well as the previous
1691 JH/11 Cutthrough: avoid using the callout hints db on a verify callout when
1692 a cutthrough deliver is pending, as we always want to make a connection.
1693 This also avoids re-routing the message when later placing the cutthrough
1694 connection after a verify cache hit.
1695 Do not update it with the verify result either.
1697 JH/12 Cutthrough: disable when verify option success_on_redirect is used, and
1698 when routing results in more than one destination address.
1700 JH/13 Cutthrough: expand transport dkim_domain option when testing for dkim
1701 signing (which inhibits the cutthrough capability). Previously only
1702 the presence of an option was tested; now an expansion evaluating as
1703 empty is permissible (obviously it should depend only on data available
1704 when the cutthrough connection is made).
1706 JH/14 Fix logging of errors under PIPELINING. Previously the log line giving
1707 the relevant preceding SMTP command did not note the pipelining mode.
1709 JH/15 Fix counting of empty lines in $body_linecount and $message_linecount.
1710 Previously they were not counted.
1712 JH/16 DANE: treat a TLSA lookup response having all non-TLSA RRs, the same
1713 as one having no matching records. Previously we deferred the message
1714 that needed the lookup.
1716 JH/17 Fakereject: previously logged as a normal message arrival "<="; now
1717 distinguished as "(=".
1719 JH/18 Bug 1867: make the fail_defer_domains option on a dnslookup router work
1720 for missing MX records. Previously it only worked for missing A records.
1722 JH/19 Bug 1850: support Radius libraries that return REJECT_RC.
1724 JH/20 Bug 1872: Ensure that acl_smtp_notquit is run when the connection drops
1725 after the data-go-ahead and data-ack. Patch from Jason Betts.
1727 JH/21 Bug 1846: Send DMARC forensic reports for reject and quarantine results,
1728 even for a "none" policy. Patch from Tony Meyer.
1730 JH/22 Fix continued use of a connection for further deliveries. If a port was
1731 specified by a router, it must also match for the delivery to be
1734 JH/23 Bug 1874: fix continued use of a connection for further deliveries.
1735 When one of the recipients of a message was unsuitable for the connection
1736 (has no matching addresses), we lost track of needing to mark it
1737 deferred. As a result mail would be lost.
1739 JH/24 Bug 1832: Log EHLO response on getting conn-close response for HELO.
1741 JH/25 Decoding ACL controls is now done using a binary search; the source code
1742 takes up less space and should be simpler to maintain. Merge the ACL
1743 condition decode tables also, with similar effect.
1745 JH/26 Fix problem with one_time used on a redirect router which returned the
1746 parent address unchanged. A retry would see the parent address marked as
1747 delivered, so not attempt the (identical) child. As a result mail would
1750 JH/27 Fix a possible security hole, wherein a process operating with the Exim
1751 UID can gain a root shell. Credit to http://www.halfdog.net/ for
1752 discovery and writeup. Ubuntu bug 1580454; no bug raised against Exim
1755 JH/28 Enable {spool,log} filesystem space and inode checks as default.
1756 Main config options check_{log,spool}_{inodes,space} are now
1757 100 inodes, 10MB unless set otherwise in the configuration.
1759 JH/29 Fix the connection_reject log selector to apply to the connect ACL.
1760 Previously it only applied to the main-section connection policy
1763 JH/30 Bug 1897: fix callouts connection fallback from TLS to cleartext.
1765 PP/01 Changed default Diffie-Hellman parameters to be Exim-specific, created
1766 by me. Added RFC7919 DH primes as an alternative.
1768 PP/02 Unbreak build via pkg-config with new hash support when crypto headers
1769 are not in the system include path.
1771 JH/31 Fix longstanding bug with aborted TLS server connection handling. Under
1772 GnuTLS, when a session startup failed (eg because the client disconnected)
1773 Exim did stdio operations after fclose. This was exposed by a recent
1774 change which nulled out the file handle after the fclose.
1776 JH/32 Bug 1909: Fix OCSP proof verification for cases where the proof is
1777 signed directly by the cert-signing cert, rather than an intermediate
1778 OCSP-signing cert. This is the model used by LetsEncrypt.
1780 JH/33 Bug 1914: Ensure socket is nonblocking before draining after SMTP QUIT.
1782 HS/01 Fix leak in verify callout under GnuTLS, about 3MB per recipient on
1783 an incoming connection.
1785 HS/02 Bug 1802: Do not half-close the connection after sending a request
1788 HS/03 Use "auto" as the default EC curve parameter. For OpenSSL < 1.0.2
1789 fallback to "prime256v1".
1791 JH/34 SECURITY: Use proper copy of DATA command in error message.
1792 Could leak key material. Remotely exploitable. CVE-2016-9963.
1798 JH/01 Bug 1664: Disable OCSP for GnuTLS library versions at/before 3.3.16
1799 and 3.4.4 - once the server is enabled to respond to an OCSP request
1800 it does even when not requested, resulting in a stapling non-aware
1801 client dropping the TLS connection.
1803 TF/01 Code cleanup: Overhaul the debug_selector and log_selector machinery to
1804 support variable-length bit vectors. No functional change.
1806 TF/02 Improve the consistency of logging incoming and outgoing interfaces.
1807 The I= interface field on outgoing lines is now after the H= remote
1808 host field, same as incoming lines. There is a separate
1809 outgoing_interface log selector which allows you to disable the
1812 JH/02 Bug 728: Close logfiles after a daemon-process "exceptional" log write.
1813 If not running log_selector +smtp_connection the mainlog would be held
1814 open indefinitely after a "too many connections" event, including to a
1815 deleted file after a log rotate. Leave the per net connection logging
1816 leaving it open for efficiency as that will be quickly detected by the
1817 check on the next write.
1819 HS/01 Bug 1671: Fix post transport crash.
1820 Processing the wait-<transport> messages could crash the delivery
1821 process if the message IDs didn't exist for some reason. When
1822 using 'split_spool_directory=yes' the construction of the spool
1823 file name failed already, exposing the same netto behaviour.
1825 JH/03 Bug 425: Capture substrings in $regex1, $regex2 etc from regex &
1826 mime_regex ACL conditions.
1828 JH/04 Bug 1686: When compiled with EXPERIMENTAL_DSN_INFO: Add extra information
1829 to DSN fail messages (bounces): remote IP, remote greeting, remote response
1830 to HELO, local diagnostic string.
1832 JH/05 Downgrade message for a TLS-certificate-based authentication fail from
1833 log line to debug. Even when configured with a tls authenticator many
1834 client connections are expected to not authenticate in this way, so
1835 an authenticate fail is not an error.
1837 HS/02 Add the Exim version string to the process info. This way exiwhat
1838 gives some more detail about the running daemon.
1840 JH/06 Bug 1395: time-limit caching of DNS lookups, to the TTL value. This may
1841 matter for fast-change records such as DNSBLs.
1843 JH/07 Bug 1678: Always record an interface option value, if set, as part of a
1844 retry record, even if constant. There may be multiple transports with
1845 different interface settings and the retry behaviour needs to be kept
1848 JH/08 Bug 1586: exiqgrep now refuses to run if there are unexpected arguments.
1850 JH/09 Bug 1700: ignore space & tab embedded in base64 during decode.
1852 JH/10 Bug 840: fix log_defer_output option of pipe transport
1854 JH/11 Bug 830: use same host for all RCPTS of a message, even under
1855 hosts_randomize. This matters a lot when combined with mua_wrapper.
1857 JH/12 Bug 1706: percent and underbar characters are no longer escaped by the
1858 ${quote_pgsql:<string>} operator.
1860 JH/13 Bug 1708: avoid misaligned access in cached lookup.
1862 JH/14 Change header file name for freeradius-client. Relevant if compiling
1863 with Radius support; from the Gentoo tree and checked under Fedora.
1865 JH/15 Bug 1712: Introduce $prdr_requested flag variable
1867 JH/16 Bug 1714: Permit an empty string as expansion result for transport
1868 option transport_filter, meaning no filtering.
1870 JH/17 Bug 1713: Fix non-PDKIM_DEBUG build. Patch from Jasen Betts.
1872 JH/18 Bug 1709: When built with TLS support, the tls_advertise_hosts option now
1873 defaults to "*" (all hosts). The variable is now available when not built
1874 with TLS, default unset, mainly to enable keeping the testsuite sane.
1875 If a server certificate is not supplied (via tls_certificate) an error is
1876 logged, and clients will find TLS connections fail on startup. Presumably
1877 they will retry in-clear.
1878 Packagers of Exim are strongly encouraged to create a server certificate
1879 at installation time.
1881 HS/03 Add -bP config_file as a synonym for -bP configure_file, for consistency
1882 with the $config_file variable.
1884 JH/19 Two additional event types: msg:rcpt:defer and msg:rcpt:host:defer. Both
1885 in transport context, after the attempt, and per-recipient. The latter type
1886 is per host attempted. The event data is the error message, and the errno
1887 information encodes the lookup type (A vs. MX) used for the (first) host,
1888 and the trailing two digits of the smtp 4xx response.
1890 GF/01 Bug 1715: Fix for race condition in exicyclog, where exim could attempt
1891 to write to mainlog (or rejectlog, paniclog) in the window between file
1892 creation and permissions/ownership being changed. Particularly affects
1893 installations where exicyclog is run as root, rather than exim user;
1894 result is that the running daemon panics and dies.
1896 JH/20 Bug 1701: For MySQL lookups, support MySQL config file option group names.
1898 JH/21 Bug 1720: Add support for priority groups and weighted-random proxy
1899 selection for the EXPERIMENTAL_SOCKS feature, via new per-proxy options
1900 "pri" and "weight". Note that the previous implicit priority given by the
1901 list order is no longer honoured.
1903 JH/22 Bugs 963, 1721: Fix some corner cases in message body canonicalization
1904 for DKIM processing.
1906 JH/23 Move SOCKS5 support from Experimental to mainline, enabled for a build
1907 by defining SUPPORT_SOCKS.
1909 JH/26 Move PROXY support from Experimental to mainline, enabled for a build
1910 by defining SUPPORT_PROXY. Note that the proxy_required_hosts option
1911 is renamed to hosts_proxy, and the proxy_{host,target}_{address,port}.
1912 variables are renamed to proxy_{local,external}_{address,port}.
1914 JH/27 Move Internationalisation support from Experimental to mainline, enabled
1915 for a build by defining SUPPORT_I18N
1917 JH/28 Bug 1745: Fix redis lookups to handle (quoted) spaces embedded in parts
1918 of the query string, and make ${quote_redis:} do that quoting.
1920 JH/29 Move Events support from Experimental to mainline, enabled by default
1921 and removable for a build by defining DISABLE_EVENT.
1923 JH/30 Updated DANE implementation code to current from Viktor Dukhovni.
1925 JH/31 Fix bug with hosts_connection_nolog and named-lists which were wrongly
1926 cached by the daemon.
1928 JH/32 Move Redis support from Experimental to mainline, enabled for a build
1929 by defining LOOKUP_REDIS. The libhiredis library is required.
1931 JH/33 Bug 1748: Permit ACL dnslists= condition in non-smtp ACLs if explicit
1932 keys are given for lookup.
1934 JH/34 Bug 1192: replace the embedded copy of PolarSSL RSA routines in the DKIM
1935 support, by using OpenSSL or GnuTLS library ones. This means DKIM is
1936 only supported when built with TLS support. The PolarSSL SHA routines
1937 are still used when the TLS library is too old for convenient support.
1939 JH/35 Require SINGLE_DH_USE by default in OpenSSL (main config option
1940 openssl_options), for security. OpenSSL forces this from version 1.1.0
1941 server-side so match that on older versions.
1943 JH/36 Bug 1778: longstanding bug in memory use by the ${run } expansion: A fresh
1944 allocation for $value could be released as the expansion processing
1945 concluded, but leaving the global pointer active for it.
1947 JH/37 Bug 1769: Permit a VRFY ACL to override the default 252 response,
1948 and to use the domains and local_parts ACL conditions.
1950 JH/38 Fix cutthrough bug with body lines having a single dot. The dot was
1951 incorrectly not doubled on cutthrough transmission, hence seen as a
1952 body-termination at the receiving system - resulting in truncated mails.
1953 Commonly the sender saw a TCP-level error, and retransmitted the message
1954 via the normal store-and-forward channel. This could result in duplicates
1955 received - but deduplicating mailstores were liable to retain only the
1956 initial truncated version.
1958 JH/39 Bug 1781: Fix use of DKIM private-keys having trailing '=' in the base-64.
1960 JH/40 Fix crash in queryprogram router when compiled with EXPERIMENTAL_SRS.
1962 JH/41 Bug 1792: Fix selection of headers to sign for DKIM: bottom-up. While
1963 we're in there, support oversigning also; bug 1309.
1965 JH/42 Bug 1796: Fix error logged on a malware scanner connection failure.
1967 HS/04 Add support for keep_environment and add_environment options.
1969 JH/43 Tidy coding issues detected by gcc --fsanitize=undefined. Some remain;
1970 either intentional arithmetic overflow during PRNG, or testing config-
1973 JH/44 Bug 1800: The combination of a -bhc commandline option and cutthrough
1974 delivery resulted in actual delivery. Cancel cutthrough before DATA
1977 JH/45 Fix cutthrough, when connection not opened by verify and target hard-
1978 rejects a recipient: pass the reject to the originator.
1980 JH/46 Multiple issues raised by Coverity. Some were obvious or plausible bugs.
1981 Many were false-positives and ignorable, but it's worth fixing the
1984 JH/47 Fix build on HP-UX and older Solaris, which need (un)setenv now also
1985 for the new environment-manipulation done at startup. Move the routines
1986 from being local to tls.c to being global via the os.c file.
1988 JH/48 Bug 1807: Fix ${extract } for the numeric/3-string case. While preparsing
1989 an extract embedded as result-arg for a map, the first arg for extract
1990 is unavailable so we cannot tell if this is a numbered or keyed
1991 extraction. Accept either.
1997 JH/01 Bug 1545: The smtp transport option "retry_include_ip_address" is now
2000 JH/02 The smtp transport option "multi_domain" is now expanded.
2002 JH/03 The smtp transport now requests PRDR by default, if the server offers
2005 JH/04 Certificate name checking on server certificates, when exim is a client,
2006 is now done by default. The transport option tls_verify_cert_hostnames
2007 can be used to disable this per-host. The build option
2008 EXPERIMENTAL_CERTNAMES is withdrawn.
2010 JH/05 The value of the tls_verify_certificates smtp transport and main options
2011 default to the word "system" to access the system default CA bundle.
2012 For GnuTLS, only version 3.0.20 or later.
2014 JH/06 Verification of the server certificate for a TLS connection is now tried
2015 (but not required) by default. The verification status is now logged by
2016 default, for both outbound TLS and client-certificate supplying inbound
2019 JH/07 Changed the default rfc1413 lookup settings to disable calls. Few
2022 JH/08 The EXPERIMENTAL_DSN compile option is no longer needed; all Delivery
2023 Status Notification (bounce) messages are now MIME format per RFC 3464.
2024 Support for RFC 3461 DSN options NOTIFY,ENVID,RET,ORCPT can be advertised
2025 under the control of the dsn_advertise_hosts option, and routers may
2026 have a dsn_lasthop option.
2028 JH/09 A timeout of 2 minutes is now applied to all malware scanner types by
2029 default, modifiable by a malware= option. The list separator for
2030 the options can now be changed in the usual way. Bug 68.
2032 JH/10 The smtp_receive_timeout main option is now expanded before use.
2034 JH/11 The incoming_interface log option now also enables logging of the
2035 local interface on delivery outgoing connections.
2037 JH/12 The cutthrough-routing facility now supports multi-recipient mails,
2038 if the interface and destination host and port all match.
2040 JH/13 Bug 344: The verify = reverse_host_lookup ACL condition now accepts a
2043 JH/14 Bug 1573: The spam= ACL condition now additionally supports Rspamd.
2044 Patch from Andrew Lewis.
2046 JH/15 Bug 670: The spamd_address main option (for the spam= ACL condition)
2047 now supports optional time-restrictions, weighting, and priority
2048 modifiers per server. Patch originally by <rommer@active.by>.
2050 JH/16 The spamd_address main option now supports a mixed list of local
2051 and remote servers. Remote servers can be IPv6 addresses, and
2052 specify a port-range.
2054 JH/17 Bug 68: The spamd_address main option now supports an optional
2055 timeout value per server.
2057 JH/18 Bug 1581: Router and transport options headers_add/remove can
2058 now have the list separator specified.
2060 JH/19 Bug 392: spamd_address, and clamd av_scanner, now support retry
2063 JH/20 Bug 1571: Ensure that $tls_in_peerdn is set, when verification fails
2066 JH/21 Support for the A6 type of dns record is withdrawn.
2068 JH/22 Bug 608: The result of a QUIT or not-QUIT toplevel ACL now matters
2069 rather than the verbs used.
2071 JH/23 Bug 1572: Increase limit on SMTP confirmation message copy size
2072 from 255 to 1024 chars.
2074 JH/24 Verification callouts now attempt to use TLS by default.
2076 HS/01 DNSSEC options (dnssec_require_domains, dnssec_request_domains)
2077 are generic router options now. The defaults didn't change.
2079 JH/25 Bug 466: Add RFC2322 support for MIME attachment filenames.
2080 Original patch from Alexander Shikoff, worked over by JH.
2082 HS/02 Bug 1575: exigrep falls back to autodetection of compressed
2083 files if ZCAT_COMMAND is not executable.
2085 JH/26 Bug 1539: Add timeout/retry options on dnsdb lookups.
2087 JH/27 Bug 286: Support SOA lookup in dnsdb lookups.
2089 JH/28 Bug 1588: Do not use the A lookup following an AAAA for setting the FQDN.
2090 Normally benign, it bites when the pair was led to by a CNAME;
2091 modern usage is to not canonicalize the domain to a CNAME target
2092 (and we were inconsistent anyway for A-only vs AAAA+A).
2094 JH/29 Bug 1632: Removed the word "rejected" from line logged for ACL discards.
2096 JH/30 Check the forward DNS lookup for DNSSEC, in addition to the reverse,
2097 when evaluating $sender_host_dnssec.
2099 JH/31 Check the HELO verification lookup for DNSSEC, adding new
2100 $sender_helo_dnssec variable.
2102 JH/32 Bug 1397: Enable ECDHE on OpenSSL, just the NIST P-256 curve.
2104 JH/33 Bug 1346: Note MAIL cmd seen in -bS batch, to avoid smtp_no_mail log.
2106 JH/34 Bug 1648: Fix a memory leak seen with "mailq" and large queues.
2108 JH/35 Bug 1642: Fix support of $spam_ variables at delivery time. Was
2109 documented as working, but never had. Support all but $spam_report.
2111 JH/36 Bug 1659: Guard checking of input smtp commands again pseudo-command
2112 added for tls authenticator.
2114 HS/03 Add perl_taintmode main config option
2120 TL/01 When running the test suite, the README says that variables such as
2121 no_msglog_check are global and can be placed anywhere in a specific
2122 test's script, however it was observed that placement needed to be near
2123 the beginning for it to behave that way. Changed the runtest perl
2124 script to read through the entire script once to detect and set these
2125 variables, reset to the beginning of the script, and then run through
2126 the script parsing/test process like normal.
2128 TL/02 The BSD's have an arc4random API. One of the functions to induce
2129 adding randomness was arc4random_stir(), but it has been removed in
2130 OpenBSD 5.5. Detect this OpenBSD version and skip calling this
2131 function when detected.
2133 JH/01 Expand the EXPERIMENTAL_TPDA feature. Several different events now
2134 cause callback expansion.
2136 TL/03 Bugzilla 1518: Clarify "condition" processing in routers; that
2137 syntax errors in an expansion can be treated as a string instead of
2138 logging or causing an error, due to the internal use of bool_lax
2139 instead of bool when processing it.
2141 JH/02 Add EXPERIMENTAL_DANE, allowing for using the DNS as trust-anchor for
2142 server certificates when making smtp deliveries.
2144 JH/03 Support secondary-separator specifier for MX, SRV, TLSA lookups.
2146 JH/04 Add ${sort {list}{condition}{extractor}} expansion item.
2148 TL/04 Bugzilla 1216: Add -M (related messages) option to exigrep.
2150 TL/05 GitHub Issue 18: Adjust logic testing for true/false in redis lookups.
2151 Merged patch from Sebastian Wiedenroth.
2153 JH/05 Fix results-pipe from transport process. Several recipients, combined
2154 with certificate use, exposed issues where response data items split
2155 over buffer boundaries were not parsed properly. This eventually
2156 resulted in duplicates being sent. This issue only became common enough
2157 to notice due to the introduction of connection certificate information,
2158 the item size being so much larger. Found and fixed by Wolfgang Breyha.
2160 JH/06 Bug 1533: Fix truncation of items in headers_remove lists. A fixed
2161 size buffer was used, resulting in syntax errors when an expansion
2164 JH/07 Add support for directories of certificates when compiled with a GnuTLS
2165 version 3.3.6 or later.
2167 JH/08 Rename the TPDA experimental facility to Event Actions. The #ifdef
2168 is EXPERIMENTAL_EVENT, the main-configuration and transport options
2169 both become "event_action", the variables become $event_name, $event_data
2170 and $event_defer_errno. There is a new variable $verify_mode, usable in
2171 routers, transports and related events. The tls:cert event is now also
2172 raised for inbound connections, if the main configuration event_action
2175 TL/06 In test suite, disable OCSP for old versions of openssl which contained
2176 early OCSP support, but no stapling (appears to be less than 1.0.0).
2178 JH/09 When compiled with OpenSSL and EXPERIMENTAL_CERTNAMES, the checks on
2179 server certificate names available under the smtp transport option
2180 "tls_verify_cert_hostname" now do not permit multi-component wildcard
2183 JH/10 Time-related extraction expansions from certificates now use the main
2184 option "timezone" setting for output formatting, and are consistent
2185 between OpenSSL and GnuTLS compilations. Bug 1541.
2187 JH/11 Fix a crash in mime ACL when meeting a zero-length, quoted or RFC2047-
2188 encoded parameter in the incoming message. Bug 1558.
2190 JH/12 Bug 1527: Autogrow buffer used in reading spool files. Since they now
2191 include certificate info, eximon was claiming there were spoolfile
2194 JH/13 Bug 1521: Fix ldap lookup for single-attr request, multiple-attr return.
2196 JH/14 Log delivery-related information more consistently, using the sequence
2197 "H=<name> [<ip>]" wherever possible.
2199 TL/07 Bug 1547: Omit RFCs from release. Draft and RFCs have licenses which
2200 are problematic for Debian distribution, omit them from the release
2203 JH/15 Updates and fixes to the EXPERIMENTAL_DSN feature.
2205 JH/16 Fix string representation of time values on 64bit time_t architectures.
2208 JH/17 Fix a null-indirection in certextract expansions when a nondefault
2209 output list separator was used.
2214 TL/01 Bugzilla 1506: Re-add a 'return NULL' to silence complaints from static
2215 checkers that were complaining about end of non-void function with no
2218 JH/01 Bug 1513: Fix parsing of quoted parameter values in MIME headers.
2219 This was a regression introduced in 4.83 by another bugfix.
2221 JH/02 Fix broken compilation when EXPERIMENTAL_DSN is enabled.
2223 TL/02 Bug 1509: Fix exipick for enhanced spoolfile specification used when
2224 EXPERIMENTAL_DSN is enabled. Fix from Wolfgang Breyha.
2230 TF/01 Correctly close the server side of TLS when forking for delivery.
2232 When a message was received over SMTP with TLS, Exim failed to clear up
2233 the incoming connection properly after forking off the child process to
2234 deliver the message. In some situations the subsequent outgoing
2235 delivery connection happened to have the same fd number as the incoming
2236 connection previously had. Exim would try to use TLS and fail, logging
2237 a "Bad file descriptor" error.
2239 TF/02 Portability fix for building lookup modules on Solaris when the xpg4
2240 utilities have not been installed.
2242 JH/01 Fix memory-handling in use of acl as a conditional; avoid free of
2243 temporary space as the ACL may create new global variables.
2245 TL/01 LDAP support uses per connection or global context settings, depending
2246 upon the detected version of the libraries at build time.
2248 TL/02 Experimental Proxy Protocol support: allows a proxied SMTP connection
2249 to extract and use the src ip:port in logging and expansions as if it
2250 were a direct connection from the outside internet. PPv2 support was
2251 updated based on HAProxy spec change in May 2014.
2253 JH/02 Add ${listextract {number}{list}{success}{fail}}.
2255 TL/03 Bugzilla 1433: Fix DMARC SEGV with specific From header contents.
2256 Properly escape header and check for NULL return.
2258 PP/01 Continue incomplete 4.82 PP/19 by fixing docs too: use dns_dnssec_ok
2261 JH/03 Bugzilla 1157: support log_selector smtp_confirmation for lmtp.
2263 TL/04 Add verify = header_names_ascii check to reject email with non-ASCII
2264 characters in header names, implemented as a verify condition.
2265 Contributed by Michael Fischer v. Mollard.
2267 TL/05 Rename SPF condition results err_perm and err_temp to standardized
2268 results permerror and temperror. Previous values are deprecated but
2269 still accepted. In a future release, err_perm and err_temp will be
2270 completely removed, which will be a backward incompatibility if the
2271 ACL tests for either of these two old results. Patch contributed by
2272 user bes-internal on the mailing list.
2274 JH/04 Add ${utf8clean:} operator. Contributed by Alex Rau.
2276 JH/05 Bugzilla 305: Log incoming-TLS details on rejects, subject to log
2277 selectors, in both main and reject logs.
2279 JH/06 Log outbound-TLS and port details, subject to log selectors, for a
2282 JH/07 Add malware type "sock" for talking to simple daemon.
2284 JH/08 Bugzilla 1371: Add tls_{,try_}verify_hosts to smtp transport.
2286 JH/09 Bugzilla 1431: Support (with limitations) headers_add/headers_remove in
2287 routers/transports under cutthrough routing.
2289 JH/10 Bugzilla 1005: ACL "condition =" should accept values which are negative
2290 numbers. Touch up "bool" conditional to keep the same definition.
2292 TL/06 Remove duplicated language in spec file from 4.82 TL/16.
2294 JH/11 Add dnsdb tlsa lookup. From Todd Lyons.
2296 JH/12 Expand items in router/transport headers_add or headers_remove lists
2297 individually rather than the list as a whole. Bug 1452.
2299 Required for reasonable handling of multiple headers_ options when
2300 they may be empty; requires that headers_remove items with embedded
2301 colons must have them doubled (or the list-separator changed).
2303 TL/07 Add new dmarc expansion variable $dmarc_domain_policy to directly
2304 view the policy declared in the DMARC record. Currently, $dmarc_status
2305 is a combined value of both the record presence and the result of the
2308 JH/13 Fix handling of $tls_cipher et.al. in (non-verify) transport. Bug 1455.
2310 JH/14 New options dnssec_request_domains, dnssec_require_domains on the
2311 dnslookup router and the smtp transport (applying to the forward
2314 TL/08 Bugzilla 1453: New LDAP "SERVERS=" option allows admin to override list
2315 of ldap servers used for a specific lookup. Patch provided by Heiko
2318 JH/18 New options dnssec_lax, dnssec_strict on dnsdb lookups.
2319 New variable $lookup_dnssec_authenticated for observability.
2321 TL/09 Bugzilla 609: Add -C option to exiqgrep, specify which exim.conf to use.
2322 Patch submitted by Lars Timman.
2324 JH/19 EXPERIMENTAL_OCSP support under GnuTLS. Bug 1459.
2326 TL/10 Bugzilla 1454: New -oMm option to pass message reference to Exim.
2327 Requires trusted mode and valid format message id, aborts otherwise.
2328 Patch contributed by Heiko Schlichting.
2330 JH/20 New expansion variables tls_(in,out)_(our,peer)cert, and expansion item
2331 certextract with support for various fields. Bug 1358.
2333 JH/21 Observability of OCSP via variables tls_(in,out)_ocsp. Stapling
2334 is requested by default, modifiable by smtp transport option
2337 JH/22 Expansion operators ${md5:string} and ${sha1:string} can now
2338 operate on certificate variables to give certificate fingerprints
2339 Also new ${sha256:cert_variable}.
2341 JH/23 The PRDR feature is moved from being Experimental into the mainline.
2343 TL/11 Bug 1119: fix memory allocation in string_printing2(). Patch from
2344 Christian Aistleitner.
2346 JH/24 The OCSP stapling feature is moved from Experimental into the mainline.
2348 TL/12 Bug 1444: Fix improper \r\n sequence handling when writing spool
2349 file. Patch from Wolfgang Breyha.
2351 JH/25 Expand the coverage of the delivery $host and $host_address to
2352 client authenticators run in verify callout. Bug 1476.
2354 JH/26 Port service names are now accepted for tls_on_connect_ports, to
2355 align with daemon_smtp_ports. Bug 72.
2357 TF/03 Fix udpsend. The ip_connectedsocket() function's socket type
2358 support and error reporting did not work properly.
2360 TL/13 Bug 1495: Exiqgrep check if -C config file specified on cli exists
2361 and is readable. Patch from Andrew Colin Kissa.
2363 TL/14 Enhance documentation of ${run expansion and how it parses the
2364 commandline after expansion, particularly in the case when an
2365 unquoted variable expansion results in an empty value.
2367 JH/27 The TLS SNI feature was broken in 4.82. Fix it.
2369 PP/02 Fix internal collision of T_APL on systems which support RFC3123
2370 by renaming away from it. Addresses GH issue 15, reported by
2373 JH/28 Fix parsing of MIME headers for parameters with quoted semicolons.
2375 TL/15 SECURITY: prevent double expansion in math comparison functions
2376 (can expand unsanitized data). Not remotely exploitable.
2383 PP/01 Add -bI: framework, and -bI:sieve for querying sieve capabilities.
2385 PP/02 Make -n do something, by making it not do something.
2386 When combined with -bP, the name of an option is not output.
2388 PP/03 Added tls_dh_min_bits SMTP transport driver option, only honoured
2391 PP/04 First step towards DNSSEC, provide $sender_host_dnssec for
2392 $sender_host_name and config options to manage this, and basic check
2395 PP/05 DSCP support for outbound connections and control modifier for inbound.
2397 PP/06 Cyrus SASL: set local and remote IP;port properties for driver.
2398 (Only plugin which currently uses this is kerberos4, which nobody should
2399 be using, but we should make it available and other future plugins might
2400 conceivably use it, even though it would break NAT; stuff *should* be
2401 using channel bindings instead).
2403 PP/07 Handle "exim -L <tag>" to indicate to use syslog with tag as the process
2404 name; added for Sendmail compatibility; requires admin caller.
2405 Handle -G as equivalent to "control = suppress_local_fixups" (we used to
2406 just ignore it); requires trusted caller.
2407 Also parse but ignore: -Ac -Am -X<logfile>
2410 TL/01 Bugzilla 1258 - Refactor MAIL FROM optional args processing.
2412 TL/02 Add +smtp_confirmation as a default logging option.
2414 TL/03 Bugzilla 198 - Implement remove_header ACL modifier.
2415 Patch by Magnus Holmgren from 2007-02-20.
2417 TL/04 Bugzilla 1281 - Spec typo.
2418 Bugzilla 1283 - Spec typo.
2419 Bugzilla 1290 - Spec grammar fixes.
2421 TL/05 Bugzilla 1285 - Spec omission, fix docbook errors for spec.txt creation.
2423 TL/06 Add Experimental DMARC support using libopendmarc libraries.
2425 TL/07 Fix an out of order global option causing a segfault. Reported to dev
2426 mailing list by by Dmitry Isaikin.
2428 JH/01 Bugzilla 1201 & 304 - New cutthrough-delivery feature, with TLS support.
2430 JH/02 Support "G" suffix to numbers in ${if comparisons.
2432 PP/08 Handle smtp transport tls_sni option forced-fail for OpenSSL.
2434 NM/01 Bugzilla 1197 - Spec typo
2435 Bugzilla 1196 - Spec examples corrections
2437 JH/03 Add expansion operators ${listnamed:name} and ${listcount:string}
2439 PP/09 Add gnutls_allow_auto_pkcs11 option (was originally called
2440 gnutls_enable_pkcs11, but renamed to more accurately indicate its
2443 PP/10 Let Linux makefile inherit CFLAGS/CFLAGS_DYNAMIC.
2444 Pulled from Debian 30_dontoverridecflags.dpatch by Andreas Metzler.
2446 JH/04 Add expansion item ${acl {name}{arg}...}, expansion condition
2447 "acl {{name}{arg}...}", and optional args on acl condition
2450 JH/05 Permit multiple router/transport headers_add/remove lines.
2452 JH/06 Add dnsdb pseudo-lookup "a+" to do an "aaaa" + "a" combination.
2454 JH/07 Avoid using a waiting database for a single-message-only transport.
2455 Performance patch from Paul Fisher. Bugzilla 1262.
2457 JH/08 Strip leading/trailing newlines from add_header ACL modifier data.
2460 JH/09 Add $headers_added variable, with content from use of ACL modifier
2461 add_header (but not yet added to the message). Bugzilla 199.
2463 JH/10 Add 8bitmime log_selector, for 8bitmime status on the received line.
2464 Pulled from Bugzilla 817 by Wolfgang Breyha.
2466 PP/11 SECURITY: protect DKIM DNS decoding from remote exploit.
2468 (nb: this is the same fix as in Exim 4.80.1)
2470 JH/11 Add A= logging on delivery lines, and a client_set_id option on
2473 JH/12 Add optional authenticated_sender logging to A= and a log_selector
2476 PP/12 Unbreak server_set_id for NTLM/SPA auth, broken by 4.80 PP/29.
2478 PP/13 Dovecot auth: log better reason to rejectlog if Dovecot did not
2479 advertise SMTP AUTH mechanism to us, instead of a generic
2480 protocol violation error. Also, make Exim more robust to bad
2481 data from the Dovecot auth socket.
2483 TF/01 Fix ultimate retry timeouts for intermittently deliverable recipients.
2485 When a queue runner is handling a message, Exim first routes the
2486 recipient addresses, during which it prunes them based on the retry
2487 hints database. After that it attempts to deliver the message to
2488 any remaining recipients. It then updates the hints database using
2491 So if a recipient address works intermittently, it can get repeatedly
2492 deferred at routing time. The retry hints record remains fresh so the
2493 address never reaches the final cutoff time.
2495 This is a fairly common occurrence when a user is bumping up against
2496 their storage quota. Exim had some logic in its local delivery code
2497 to deal with this. However it did not apply to per-recipient defers
2498 in remote deliveries, e.g. over LMTP to a separate IMAP message store.
2500 This change adds a proper retry rule check during routing so that the
2501 final cutoff time is checked against the message's age. We only do
2502 this check if there is an address retry record and there is not a
2503 domain retry record; this implies that previous attempts to handle
2504 the address had the retry_use_local_parts option turned on. We use
2505 this as an approximation for the destination being like a local
2506 delivery, as in LMTP.
2508 I suspect this new check makes the old local delivery cutoff check
2509 redundant, but I have not verified this so I left the code in place.
2511 TF/02 Correct gecos expansion when From: is a prefix of the username.
2513 Test 0254 submits a message to Exim with the header
2517 When I ran the test suite under the user fanf2, Exim expanded
2518 the header to contain my full name, whereas it should have added
2519 a Resent-Sender: header. It erroneously treats any prefix of the
2520 username as equal to the username.
2522 This change corrects that bug.
2524 GF/01 DCC debug and logging tidyup
2525 Error conditions log to paniclog rather than rejectlog.
2526 Debug lines prefixed by "DCC: " to remove any ambiguity.
2528 TF/03 Avoid unnecessary rebuilds of lookup-related code.
2530 PP/14 Fix OCSP reinitialisation in SNI handling for Exim/TLS as server.
2531 Bug spotted by Jeremy Harris; was flawed since initial commit.
2532 Would have resulted in OCSP responses post-SNI triggering an Exim
2533 NULL dereference and crash.
2535 JH/13 Add $router_name and $transport_name variables. Bugzilla 308.
2537 PP/15 Define SIOCGIFCONF_GIVES_ADDR for GNU Hurd.
2538 Bug detection, analysis and fix by Samuel Thibault.
2539 Bugzilla 1331, Debian bug #698092.
2541 SC/01 Update eximstats to watch out for senders sending 'HELO [IpAddr]'
2543 JH/14 SMTP PRDR (http://www.eric-a-hall.com/specs/draft-hall-prdr-00.txt).
2544 Server implementation by Todd Lyons, client by JH.
2545 Only enabled when compiled with EXPERIMENTAL_PRDR. A new
2546 config variable "prdr_enable" controls whether the server
2547 advertises the facility. If the client requests PRDR a new
2548 acl_data_smtp_prdr ACL is called once for each recipient, after
2549 the body content is received and before the acl_smtp_data ACL.
2550 The client is controlled by both of: a hosts_try_prdr option
2551 on the smtp transport, and the server advertisement.
2552 Default client logging of deliveries and rejections involving
2553 PRDR are flagged with the string "PRDR".
2555 PP/16 Fix problems caused by timeouts during quit ACLs trying to double
2556 fclose(). Diagnosis by Todd Lyons.
2558 PP/17 Update configure.default to handle IPv6 localhost better.
2559 Patch by Alain Williams (plus minor tweaks).
2562 PP/18 OpenSSL made graceful with empty tls_verify_certificates setting.
2563 This is now consistent with GnuTLS, and is now documented: the
2564 previous undocumented portable approach to treating the option as
2565 unset was to force an expansion failure. That still works, and
2566 an empty string is now equivalent.
2568 PP/19 Renamed DNSSEC-enabling option to "dns_dnssec_ok", to make it
2569 clearer that Exim is using the DO (DNSSEC OK) EDNS0 resolver flag,
2570 not performing validation itself.
2572 PP/20 Added force_command boolean option to pipe transport.
2573 Patch from Nick Koston, of cPanel Inc.
2575 JH/15 AUTH support on callouts (and hence cutthrough-deliveries).
2578 TF/04 Added udpsend ACL modifier and hexquote expansion operator
2580 PP/21 Fix eximon continuous updating with timestamped log-files.
2581 Broken in a format-string cleanup in 4.80, missed when I repaired the
2582 other false fix of the same issue.
2583 Report and fix from Heiko Schlichting.
2586 PP/22 Guard LDAP TLS usage against Solaris LDAP variant.
2587 Report from Prashanth Katuri.
2589 PP/23 Support safari_ecdhe_ecdsa_bug for openssl_options.
2590 It's SecureTransport, so affects any MacOS clients which use the
2591 system-integrated TLS libraries, including email clients.
2593 PP/24 Fix segfault from trying to fprintf() to a NULL stdio FILE* if
2594 using a MIME ACL for non-SMTP local injection.
2595 Report and assistance in diagnosis by Warren Baker.
2597 TL/08 Adjust exiqgrep to be case-insensitive for sender/receiver.
2599 JH/16 Fix comparisons for 64b. Bugzilla 1385.
2601 TL/09 Add expansion variable $authenticated_fail_id to keep track of
2602 last id that failed so it may be referenced in subsequent ACL's.
2604 TL/10 Bugzilla 1375 - Prevent TLS rebinding in ldap. Patch provided by
2607 TL/11 Bugzilla 1382 - Option ldap_require_cert overrides start_tls
2608 ldap library initialization, allowing self-signed CA's to be
2609 used. Also properly sets require_cert option later in code by
2610 using NULL (global ldap config) instead of ldap handle (per
2611 session). Bug diagnosis and testing by alxgomz.
2613 TL/12 Enhanced documentation in the ratelimit.pl script provided in
2614 the src/util/ subdirectory.
2616 TL/13 Bug 1031 - Imported transport SQL logging patch from Axel Rau
2617 renamed to Transport Post Delivery Action by Jeremy Harris, as
2620 TL/14 Bugzilla 1217 - Redis lookup support has been added. It is only enabled
2621 when Exim is compiled with EXPERIMENTAL_REDIS. A new config variable
2622 redis_servers = needs to be configured which will be used by the redis
2623 lookup. Patch from Warren Baker, of The Packet Hub.
2625 TL/15 Fix exiqsumm summary for corner case. Patch provided by Richard Hall.
2627 TL/16 Bugzilla 1289 - Clarify host/ip processing when have errors looking up a
2628 hostname or reverse DNS when processing a host list. Used suggestions
2629 from multiple comments on this bug.
2631 TL/17 Bugzilla 1057 - Multiple clamd TCP targets patch from Mark Zealey.
2633 TL/18 Had previously added a -CONTINUE option to runtest in the test suite.
2634 Missed a few lines, added it to make the runtest require no keyboard
2637 TL/19 Bugzilla 1402 - Test 533 fails if any part of the path to the test suite
2638 contains upper case chars. Make router use caseful_local_part.
2640 TL/20 Bugzilla 1400 - Add AVOID_GNUTLS_PKCS11 build option. Allows GnuTLS
2641 support when GnuTLS has been built with p11-kit.
2647 PP/01 SECURITY: protect DKIM DNS decoding from remote exploit.
2649 This, or similar/improved, will also be change PP/11 of 4.82.
2655 PP/01 Handle short writes when writing local log-files.
2656 In practice, only affects FreeBSD (8 onwards).
2657 Bugzilla 1053, with thanks to Dmitry Isaikin.
2659 NM/01 Bugzilla 949 - Documentation tweak
2661 NM/02 Bugzilla 1093 - eximstats DATA reject detection regexps
2664 NM/03 Bugzilla 1169 - primary_hostname spelling was incorrect in docs.
2666 PP/02 Implemented gsasl authenticator.
2668 PP/03 Implemented heimdal_gssapi authenticator with "server_keytab" option.
2670 PP/04 Local/Makefile support for (AUTH|LOOKUP)_*_PC=foo to use
2671 `pkg-config foo` for cflags/libs.
2673 PP/05 Swapped $auth1/$auth2 for gsasl GSSAPI mechanism, to be more consistent
2674 with rest of GSASL and with heimdal_gssapi.
2676 PP/06 Local/Makefile support for USE_(GNUTLS|OPENSSL)_PC=foo to use
2677 `pkg-config foo` for cflags/libs for the TLS implementation.
2679 PP/07 New expansion variable $tls_bits; Cyrus SASL server connection
2680 properties get this fed in as external SSF. A number of robustness
2681 and debugging improvements to the cyrus_sasl authenticator.
2683 PP/08 cyrus_sasl server now expands the server_realm option.
2685 PP/09 Bugzilla 1214 - Log authentication information in reject log.
2686 Patch by Jeremy Harris.
2688 PP/10 Added dbmjz lookup type.
2690 PP/11 Let heimdal_gssapi authenticator take a SASL message without an authzid.
2692 PP/12 MAIL args handles TAB as well as SP, for better interop with
2693 non-compliant senders.
2694 Analysis and variant patch by Todd Lyons.
2696 NM/04 Bugzilla 1237 - fix cases where printf format usage not indicated
2697 Bug report from Lars Müller <lars@samba.org> (via SUSE),
2698 Patch from Dirk Mueller <dmueller@suse.com>
2700 PP/13 tls_peerdn now print-escaped for spool files.
2701 Observed some $tls_peerdn in wild which contained \n, which resulted
2702 in spool file corruption.
2704 PP/14 TLS fixes for OpenSSL: support TLS 1.1 & 1.2; new "openssl_options"
2705 values; set SSL_MODE_AUTO_RETRY so that OpenSSL will retry a read
2706 or write after TLS renegotiation, which otherwise led to messages
2709 TK/01 Bugzilla 1239 - fix DKIM verification when signature was not inserted
2710 as a tracking header (ie: a signed header comes before the signature).
2711 Patch from Wolfgang Breyha.
2713 JH/01 Bugzilla 660 - Multi-valued attributes from ldap now parseable as a
2714 comma-sep list; embedded commas doubled.
2716 JH/02 Refactored ACL "verify =" logic to table-driven dispatch.
2718 PP/15 LDAP: Check for errors of TLS initialisation, to give correct
2720 Report and patch from Dmitry Banschikov.
2722 PP/16 Removed "dont_insert_empty_fragments" from "openssl_options".
2723 Removed SSL_clear() after SSL_new() which led to protocol negotiation
2724 failures. We appear to now support TLS1.1+ with Exim.
2726 PP/17 OpenSSL: new expansion var $tls_sni, which if used in tls_certificate
2727 lets Exim select keys and certificates based upon TLS SNI from client.
2728 Also option tls_sni on SMTP Transports. Also clear $tls_bits correctly
2729 before an outbound SMTP session. New log_selector, +tls_sni.
2731 PP/18 Bugzilla 1122 - check localhost_number expansion for failure, avoid
2732 NULL dereference. Report and patch from Alun Jones.
2734 PP/19 DNS resolver init changes for NetBSD compatibility. (Risk of breakage
2735 on less well tested platforms). Obviates NetBSD pkgsrc patch-ac.
2736 Not seeing resolver debug output on NetBSD, but suspect this is a
2737 resolver implementation change.
2739 PP/20 Revert part of NM/04, it broke log_path containing %D expansions.
2740 Left warnings. Added "eximon gdb" invocation mode.
2742 PP/21 Defaulting "accept_8bitmime" to true, not false.
2744 PP/22 Added -bw for inetd wait mode support.
2746 PP/23 Added PCRE_CONFIG=yes support to Makefile for using pcre-config to
2747 locate the relevant includes and libraries. Made this the default.
2749 PP/24 Fixed headers_only on smtp transports (was not sending trailing dot).
2750 Bugzilla 1246, report and most of solution from Tomasz Kusy.
2752 JH/03 ${eval } now uses 64-bit and supports a "g" suffix (like to "k" and "m").
2753 This may cause build issues on older platforms.
2755 PP/25 Revamped GnuTLS support, passing tls_require_ciphers to
2756 gnutls_priority_init, ignoring Exim options gnutls_require_kx,
2757 gnutls_require_mac & gnutls_require_protocols (no longer supported).
2758 Added SNI support via GnuTLS too.
2759 Made ${randint:..} supplier available, if using not-too-old GnuTLS.
2761 PP/26 Added EXPERIMENTAL_OCSP for OpenSSL.
2763 PP/27 Applied dnsdb SPF support patch from Janne Snabb.
2764 Applied second patch from Janne, implementing suggestion to default
2765 multiple-strings-in-record handling to match SPF spec.
2767 JH/04 Added expansion variable $tod_epoch_l for a higher-precision time.
2769 PP/28 Fix DCC dcc_header content corruption (stack memory referenced,
2770 read-only, out of scope).
2771 Patch from Wolfgang Breyha, report from Stuart Northfield.
2773 PP/29 Fix three issues highlighted by clang analyser static analysis.
2774 Only crash-plausible issue would require the Cambridge-specific
2775 iplookup router and a misconfiguration.
2776 Report from Marcin Mirosław.
2778 PP/30 Another attempt to deal with PCRE_PRERELEASE, this one less buggy.
2780 PP/31 %D in printf continues to cause issues (-Wformat=security), so for
2781 now guard some of the printf checks behind WANT_DEEPER_PRINTF_CHECKS.
2782 As part of this, removing so much warning spew let me fix some minor
2783 real issues in debug logging.
2785 PP/32 GnuTLS was always using default tls_require_ciphers, due to a missing
2786 assignment on my part. Fixed.
2788 PP/33 Added tls_dh_max_bits option, defaulting to current hard-coded limit
2789 of NSS, for GnuTLS/NSS interop. Problem root cause diagnosis by
2790 Janne Snabb (who went above and beyond: thank you).
2792 PP/34 Validate tls_require_ciphers on startup, since debugging an invalid
2793 string otherwise requires a connection and a bunch more work and it's
2794 relatively easy to get wrong. Should also expose TLS library linkage
2797 PP/35 Pull in <features.h> on Linux, for some portability edge-cases of
2798 64-bit ${eval} (JH/03).
2800 PP/36 Define _GNU_SOURCE in exim.h; it's needed for some releases of
2801 GNU libc to support some of the 64-bit stuff, should not lead to
2802 conflicts. Defined before os.h is pulled in, so if a given platform
2803 needs to override this, it can.
2805 PP/37 Unbreak Cyrus SASL auth: SSF retrieval was incorrect, Exim thought
2806 protection layer was required, which is not implemented.
2807 Bugzilla 1254, patch from Wolfgang Breyha.
2809 PP/38 Overhaul DH prime handling, supply RFC-specified DH primes as built
2810 into Exim, default to IKE id 23 from RFC 5114 (2048 bit). Make
2811 tls_dhparam take prime identifiers. Also unbreak combination of
2812 OpenSSL+DH_params+TLSSNI.
2814 PP/39 Disable SSLv2 by default in OpenSSL support.
2820 PP/01 Solaris build fix for Oracle's LDAP libraries.
2821 Bugzilla 1109, patch from Stephen Usher.
2823 TF/01 HP/UX build fix: avoid arithmetic on a void pointer.
2825 TK/01 DKIM Verification: Fix relaxed canon for empty headers w/o
2828 TF/02 Fix a couple more cases where we did not log the error message
2829 when unlink() failed. See also change 4.74-TF/03.
2831 TF/03 Make the exiwhat support code safe for signals. Previously Exim might
2832 lock up or crash if it happened to be inside a call to libc when it
2833 got a SIGUSR1 from exiwhat.
2835 The SIGUSR1 handler appends the current process status to the process
2836 log which is later printed by exiwhat. It used to use the general
2837 purpose logging code to do this, but several functions it calls are
2838 not safe for signals.
2840 The new output code in the SIGUSR1 handler is specific to the process
2841 log, and simple enough that it's easy to inspect for signal safety.
2842 Removing some special cases also simplifies the general logging code.
2843 Removing the spurious timestamps from the process log simplifies
2846 TF/04 Improved ratelimit ACL condition.
2848 The /noupdate option has been deprecated in favour of /readonly which
2849 has clearer semantics. The /leaky, /strict, and /readonly update modes
2850 are mutually exclusive. The update mode is no longer included in the
2851 database key; it just determines when the database is updated. (This
2852 means that when you upgrade Exim will forget old rate measurements.)
2854 Exim now checks that the per_* options are used with an update mode that
2855 makes sense for the current ACL. For example, when Exim is processing a
2856 message (e.g. acl_smtp_rcpt or acl_smtp_data, etc.) you can specify
2857 per_mail/leaky or per_mail/strict; otherwise (e.g. in acl_smtp_helo) you
2858 must specify per_mail/readonly. If you omit the update mode it defaults to
2859 /leaky where that makes sense (as before) or /readonly where required.
2861 The /noupdate option is now undocumented but still supported for
2862 backwards compatibility. It is equivalent to /readonly except that in
2863 ACLs where /readonly is required you may specify /leaky/noupdate or
2864 /strict/noupdate which are treated the same as /readonly.
2866 A useful new feature is the /count= option. This is a generalization
2867 of the per_byte option, so that you can measure the throughput of other
2868 aggregate values. For example, the per_byte option is now equivalent
2869 to per_mail/count=${if >{0}{$message_size} {0} {$message_size} }.
2871 The per_rcpt option has been generalized using the /count= mechanism
2872 (though it's more complicated than the per_byte equivalence). When it is
2873 used in acl_smtp_rcpt, the per_rcpt option adds recipients to the
2874 measured rate one at a time; if it is used later (e.g. in acl_smtp_data)
2875 or in a non-SMTP ACL it adds all the recipients in one go. (The latter
2876 /count=$recipients_count behaviour used to work only in non-SMTP ACLs.)
2877 Note that using per_rcpt with a non-readonly update mode in more than
2878 one ACL will cause the recipients to be double-counted. (The per_mail
2879 and per_byte options don't have this problem.)
2881 The handling of very low rates has changed slightly. If the computed rate
2882 is less than the event's count (usually one) then this event is the first
2883 after a long gap. In this case the rate is set to the same as this event's
2884 count, so that the first message of a spam run is counted properly.
2886 The major new feature is a mechanism for counting the rate of unique
2887 events. The new per_addr option counts the number of different
2888 recipients that someone has sent messages to in the last time period. It
2889 behaves like per_rcpt if all the recipient addresses are different, but
2890 duplicate recipient addresses do not increase the measured rate. Like
2891 the /count= option this is a general mechanism, so the per_addr option
2892 is equivalent to per_rcpt/unique=$local_part@$domain. You can, for
2893 example, measure the rate that a client uses different sender addresses
2894 with the options per_mail/unique=$sender_address. There are further
2895 details in the main documentation.
2897 TF/05 Removed obsolete $Cambridge$ CVS revision strings.
2899 TF/06 Removed a few PCRE remnants.
2901 TF/07 Automatically extract Exim's version number from tags in the git
2902 repository when doing development or release builds.
2904 PP/02 Raise smtp_cmd_buffer_size to 16kB.
2905 Bugzilla 879. Patch from Paul Fisher.
2907 PP/03 Implement SSL-on-connect outbound with protocol=smtps on smtp transport.
2908 Heavily based on revision 40f9a89a from Simon Arlott's tree.
2911 PP/04 Use .dylib instead of .so for dynamic library loading on MacOS.
2913 PP/05 Variable $av_failed, true if the AV scanner deferred.
2914 Bugzilla 1078. Patch from John Horne.
2916 PP/06 Stop make process more reliably on build failure.
2917 Bugzilla 1087. Patch from Heiko Schlittermann.
2919 PP/07 Make maildir_use_size_file an _expandable_ boolean.
2920 Bugzilla 1089. Patch from Heiko Schlittermann.
2922 PP/08 Handle ${run} returning more data than OS pipe buffer size.
2923 Bugzilla 1131. Patch from Holger Weiß.
2925 PP/09 Handle IPv6 addresses with SPF.
2926 Bugzilla 860. Patch from Wolfgang Breyha.
2928 PP/10 GnuTLS: support TLS 1.2 & 1.1.
2930 Use gnutls_certificate_verify_peers2() [patch from Andreas Metzler].
2933 PP/11 match_* no longer expand right-hand-side by default.
2934 New compile-time build option, EXPAND_LISTMATCH_RHS.
2935 New expansion conditions, "inlist", "inlisti".
2937 PP/12 fix uninitialised greeting string from PP/03 (smtps client support).
2939 PP/13 shell and compiler warnings fixes for RC1-RC4 changes.
2941 PP/14 fix log_write() format string regression from TF/03.
2942 Bugzilla 1152. Patch from Dmitry Isaikin.
2948 PP/01 The new ldap_require_cert option would segfault if used. Fixed.
2950 PP/02 Harmonised TLS library version reporting; only show if debugging.
2951 Layout now matches that introduced for other libraries in 4.74 PP/03.
2953 PP/03 New openssl_options items: no_sslv2 no_sslv3 no_ticket no_tlsv1
2955 PP/04 New "dns_use_edns0" global option.
2957 PP/05 Don't segfault on misconfiguration of ref:name exim-user as uid.
2960 PP/06 Extra paranoia around buffer usage at the STARTTLS transition.
2961 nb: Exim is not vulnerable to http://www.kb.cert.org/vuls/id/555316
2963 TK/01 Updated PolarSSL code to 0.14.2.
2964 Bugzilla 1097. Patch from Andreas Metzler.
2966 PP/07 Catch divide-by-zero in ${eval:...}.
2967 Fixes bugzilla 1102.
2969 PP/08 Condition negation of bool{}/bool_lax{} did not negate. Fixed.
2972 TK/02 Bugzilla 1106: CVE-2011-1764 - DKIM log line was subject to a
2973 format-string attack -- SECURITY: remote arbitrary code execution.
2975 TK/03 SECURITY - DKIM signature header parsing was double-expanded, second
2976 time unintentionally subject to list matching rules, letting the header
2977 cause arbitrary Exim lookups (of items which can occur in lists, *not*
2978 arbitrary string expansion). This allowed for information disclosure.
2980 PP/09 Fix another SIGFPE (x86) in ${eval:...} expansion, this time related to
2981 INT_MIN/-1 -- value coerced to INT_MAX.
2987 NM/01 Workaround for PCRE version dependency in version reporting
2990 TF/01 Update valgrind.h and memcheck.h to copies from valgrind-3.6.0.
2991 This fixes portability to compilers other than gcc, notably
2992 Solaris CC and HP-UX CC. Fixes Bugzilla 1050.
2994 TF/02 Bugzilla 139: Avoid using the += operator in the modular lookup
2995 makefiles for portability to HP-UX and POSIX correctness.
2997 PP/01 Permit LOOKUP_foo enabling on the make command-line.
2998 Also via indented variable definition in the Makefile.
2999 (Debugging by Oliver Heesakkers).
3001 PP/02 Restore caching of spamd results with expanded spamd_address.
3002 Patch from author of expandable spamd_address patch, Wolfgang Breyha.
3004 PP/03 Build issue: lookups-Makefile now exports LC_ALL=C
3005 Improves build reliability. Fix from: Frank Elsner
3007 NM/02 Fix wide character breakage in the rfc2047 coding
3008 Fixes bug 1064. Patch from Andrey N. Oktyabrski
3010 NM/03 Allow underscore in dnslist lookups
3011 Fixes bug 1026. Patch from Graeme Fowler
3013 PP/04 Bugzilla 230: Support TLS-enabled LDAP (in addition to ldaps).
3014 Code patches from Adam Ciarcinski of NetBSD.
3016 NM/04 Fixed exiqgrep to cope with mailq missing size issue
3019 PP/05 Bugzilla 1083: when lookup expansion defers, escape the output which
3020 is logged, to avoid truncation. Patch from John Horne.
3022 PP/06 Bugzilla 1042: implement freeze_signal on pipe transports.
3023 Patch from Jakob Hirsch.
3025 PP/07 Bugzilla 1061: restrict error messages sent over SMTP to not reveal
3026 SQL string expansion failure details.
3027 Patch from Andrey Oktyabrski.
3029 PP/08 Bugzilla 486: implement %M datestamping in log filenames.
3030 Patch from Simon Arlott.
3032 PP/09 New lookups functionality failed to compile on old gcc which rejects
3033 extern declarations in function scope.
3034 Patch from Oliver Fleischmann
3036 PP/10 Use sig_atomic_t for flags set from signal handlers.
3037 Check getgroups() return and improve debugging.
3038 Fixed developed for diagnosis in bug 927 (which turned out to be
3041 PP/11 Bugzilla 1055: Update $message_linecount for maildir_tag.
3042 Patch from Mark Zealey.
3044 PP/12 Bugzilla 1056: Improved spamd server selection.
3045 Patch from Mark Zealey.
3047 PP/13 Bugzilla 1086: Deal with maildir quota file races.
3048 Based on patch from Heiko Schlittermann.
3050 PP/14 Bugzilla 1019: DKIM multiple signature generation fix.
3051 Patch from Uwe Doering, sign-off by Michael Haardt.
3053 NM/05 Fix to spam.c to accommodate older gcc versions which dislike
3054 variable declaration deep within a block. Bug and patch from
3057 PP/15 lookups-Makefile IRIX compatibility coercion.
3059 PP/16 Make DISABLE_DKIM build knob functional.
3061 NM/06 Bugzilla 968: child_open_uid: restore default SIGPIPE handler
3062 Patch by Simon Arlott
3064 TF/03 Fix valgrind.h portability to C89 compilers that do not support
3065 variable argument macros. Our copy now differs from upstream.
3071 TF/01 Failure to get a lock on a hints database can have serious
3072 consequences so log it to the panic log.
3074 TF/02 Log LMTP confirmation messages in the same way as SMTP,
3075 controlled using the smtp_confirmation log selector.
3077 TF/03 Include the error message when we fail to unlink a spool file.
3079 DW/01 Bugzilla 139: Support dynamically loaded lookups as modules.
3080 With thanks to Steve Haslam, Johannes Berg & Serge Demonchaux
3081 for maintaining out-of-tree patches for some time.
3083 PP/01 Bugzilla 139: Documentation and portability issues.
3084 Avoid GNU Makefile-isms, let Exim continue to build on BSD.
3085 Handle per-OS dynamic-module compilation flags.
3087 PP/02 Let /dev/null have normal permissions.
3088 The 4.73 fixes were a little too stringent and complained about the
3089 permissions on /dev/null. Exempt it from some checks.
3090 Reported by Andreas M. Kirchwitz.
3092 PP/03 Report version information for many libraries, including
3093 Exim version information for dynamically loaded libraries. Created
3094 version.h, now support a version extension string for distributors
3095 who patch heavily. Dynamic module ABI change.
3097 PP/04 CVE-2011-0017 - check return value of setuid/setgid. This is a
3098 privilege escalation vulnerability whereby the Exim run-time user
3099 can cause root to append content of the attacker's choosing to
3102 PP/05 Bugzilla 1041: merged DCC maintainer's fixes for return code.
3105 PP/06 Bugzilla 1071: fix delivery logging with untrusted macros.
3106 If dropping privileges for untrusted macros, we disabled normal logging
3107 on the basis that it would fail; for the Exim run-time user, this is not
3108 the case, and it resulted in successful deliveries going unlogged.
3109 Fixed. Reported by Andreas Metzler.
3115 PP/01 Date: & Message-Id: revert to normally being appended to a message,
3116 only prepend for the Resent-* case. Fixes regression introduced in
3117 Exim 4.70 by NM/22 for Bugzilla 607.
3119 PP/02 Include check_rfc2047_length in configure.default because we're seeing
3120 increasing numbers of administrators be bitten by this.
3122 JJ/01 Added DISABLE_DKIM and comment to src/EDITME
3124 PP/03 Bugzilla 994: added openssl_options main configuration option.
3126 PP/04 Bugzilla 995: provide better SSL diagnostics on failed reads.
3128 PP/05 Bugzilla 834: provide a permit_coredump option for pipe transports.
3130 PP/06 Adjust NTLM authentication to handle SASL Initial Response.
3132 PP/07 If TLS negotiated an anonymous cipher, we could end up with SSL but
3133 without a peer certificate, leading to a segfault because of an
3134 assumption that peers always have certificates. Be a little more
3135 paranoid. Problem reported by Martin Tscholak.
3137 PP/08 Bugzilla 926: switch ClamAV to use the new zINSTREAM API for content
3138 filtering; old API available if built with WITH_OLD_CLAMAV_STREAM=yes
3139 NB: ClamAV planning to remove STREAM in "middle of 2010".
3140 CL also introduces -bmalware, various -d+acl logging additions and
3141 more caution in buffer sizes.
3143 PP/09 Implemented reverse_ip expansion operator.
3145 PP/10 Bugzilla 937: provide a "debug" ACL control.
3147 PP/11 Bugzilla 922: Documentation dusting, patch provided by John Horne.
3149 PP/12 Bugzilla 973: Implement --version.
3151 PP/13 Bugzilla 752: Refuse to build/run if Exim user is root/0.
3153 PP/14 Build without WITH_CONTENT_SCAN. Path from Andreas Metzler.
3155 PP/15 Bugzilla 816: support multiple condition rules on Routers.
3157 PP/16 Add bool_lax{} expansion operator and use that for combining multiple
3158 condition rules, instead of bool{}. Make both bool{} and bool_lax{}
3159 ignore trailing whitespace.
3161 JJ/02 prevent non-panic DKIM error from being sent to paniclog
3163 JJ/03 added tcp_wrappers_daemon_name to allow host entries other than
3166 PP/17 Fix malware regression for cmdline scanner introduced in PP/08.
3167 Notification from Dr Andrew Aitchison.
3169 PP/18 Change ClamAV response parsing to be more robust and to handle ClamAV's
3170 ExtendedDetectionInfo response format.
3171 Notification from John Horne.
3173 PP/19 OpenSSL 1.0.0a compatibility const-ness change, should be backwards
3176 PP/20 Added a CONTRIBUTING file. Fixed the documentation build to use http:
3177 XSL and documented dependency on system catalogs, with examples of how
3180 DW/21 Added Valgrind hooks in store.c to help it capture out-of-bounds store
3183 DW/22 Bugzilla 1044: CVE-2010-4345 - partial fix: restrict default behaviour
3184 of CONFIGURE_OWNER and CONFIGURE_GROUP options to no longer allow a
3185 configuration file which is writeable by the Exim user or group.
3187 DW/23 Bugzilla 1044: CVE-2010-4345 - part two: extend checks for writeability
3188 of configuration files to cover files specified with the -C option if
3189 they are going to be used with root privileges, not just the default
3192 DW/24 Bugzilla 1044: CVE-2010-4345 - part three: remove ALT_CONFIG_ROOT_ONLY
3193 option (effectively making it always true).
3195 DW/25 Add TRUSTED_CONFIG_PREFIX_FILE option to allow alternative configuration
3196 files to be used while preserving root privileges.
3198 DW/26 Set FD_CLOEXEC on SMTP sockets after forking in the daemon, to ensure
3199 that rogue child processes cannot use them.
3201 PP/27 Bugzilla 1047: change the default for system_filter_user to be the Exim
3202 run-time user, instead of root.
3204 PP/28 Add WHITELIST_D_MACROS option to let some macros be overridden by the
3205 Exim run-time user without dropping privileges.
3207 DW/29 Remove use of va_copy() which breaks pre-C99 systems. Duplicate the
3208 result string, instead of calling string_vformat() twice with the same
3211 DW/30 Allow TRUSTED_CONFIG_PREFIX_FILE only for Exim or CONFIGURE_OWNER, not
3212 for other users. Others should always drop root privileges if they use
3213 -C on the command line, even for a whitelisted configure file.
3215 DW/31 Turn TRUSTED_CONFIG_PREFIX_FILE into TRUSTED_CONFIG_FILE. No prefixes.
3217 NM/01 Fixed bug #1002 - Message loss when using multiple deliveries
3223 JJ/01 installed exipick 20100104.1, adding $max_received_linelength,
3224 $data_path, and $header_path variables; fixed documentation bugs and
3227 JJ/02 installed exipick 20100222.0, added --input-dir and --finput to allow
3228 exipick to access non-standard spools, including the "frozen" queue
3231 NM/01 Bugzilla 965: Support mysql stored procedures.
3232 Patch from Alain Williams
3234 NM/02 Bugzilla 961: Spacing fix (syntax error) on Makefile directives for NetBSD
3236 NM/03 Bugzilla 955: Documentation fix for max_rcpts.
3237 Patch from Andreas Metzler
3239 NM/04 Bugzilla 954: Fix for unknown responses from Dovecot authenticator.
3240 Patch from Kirill Miazine
3242 NM/05 Bugzilla 671: Added umask to procmail example.
3244 JJ/03 installed exipick 20100323.0, fixing doc bug
3246 NM/06 Bugzilla 988: CVE-2010-2023 - prevent hardlink attack on sticky mail
3247 directory. Notification and patch from Dan Rosenberg.
3249 TK/01 PDKIM: Upgrade PolarSSL files to upstream version 0.12.1.
3251 TK/02 Improve log output when DKIM signing operation fails.
3253 MH/01 Treat the transport option dkim_domain as a colon separated
3254 list, not as a single string, and sign the message with each element,
3255 omitting multiple occurences of the same signer.
3257 NM/07 Null terminate DKIM strings, Null initialise DKIM variable
3258 Bugzilla 985, 986. Patch by Simon Arlott
3260 NM/08 Bugzilla 967. dnsdb DNS TXT record bug fix (DKIM-related)
3261 Patch by Simon Arlott
3263 PP/01 Bugzilla 989: CVE-2010-2024 - work round race condition on
3264 MBX locking. Notification from Dan Rosenberg.
3270 TK/01 Bugzilla 912: Fix DKIM segfault on empty headers/body.
3272 NM/01 Bugzilla 913: Documentation fix for gnutls_* options.
3274 NM/02 Bugzilla 722: Documentation for randint. Better randomness defaults.
3276 NM/03 Bugzilla 847: Enable DNSDB lookup by default.
3278 NM/04 Bugzilla 915: Flag broken perl installation during build.
3284 TK/01 Added patch by Johannes Berg that expands the main option
3285 "spamd_address" if it starts with a dollar sign.
3287 TK/02 Write list of recipients to X-Envelope-Sender header when building
3288 the mbox-format spool file for content scanning (suggested by Jakob
3291 TK/03 Added patch by Wolfgang Breyha that adds experimental DCC
3292 (http://www.dcc-servers.net/) support via dccifd. Activated by
3293 setting EXPERIMENTAL_DCC=yes in Local/Makefile.
3295 TK/04 Bugzilla 673: Add f-protd malware scanner support. Patch submitted
3296 by Mark Daniel Reidel <mr@df.eu>.
3298 NM/01 Bugzilla 657: Embedded PCRE removed from the exim source tree.
3299 When building exim an external PCRE library is now needed -
3300 PCRE is a system library on the majority of modern systems.
3301 See entry on PCRE_LIBS in EDITME file.
3303 NM/02 Bugzilla 646: Removed unwanted C/R in Dovecot authenticator
3304 conversation. Added nologin parameter to request.
3305 Patch contributed by Kirill Miazine.
3307 TF/01 Do not log submission mode rewrites if they do not change the address.
3309 TF/02 Bugzilla 662: Fix stack corruption before exec() in daemon.c.
3311 NM/03 Bugzilla 602: exicyclog now handles panic log, and creates empty
3312 log files in place. Contributed by Roberto Lima.
3314 NM/04 Bugzilla 667: Close socket used by dovecot authenticator.
3316 TF/03 Bugzilla 615: When checking the local_parts router precondition
3317 after a local_part_suffix or local_part_prefix option, Exim now
3318 does not use the address's named list lookup cache, since this
3319 contains cached lookups for the whole local part.
3321 NM/05 Bugzilla 521: Integrated SPF Best Guess support contributed by
3322 Robert Millan. Documentation is in experimental-spec.txt.
3324 TF/04 Bugzilla 668: Fix parallel build (make -j).
3326 NM/05.2 Bugzilla 437: Prevent Maildir aux files being created with mode 000.
3328 NM/05.3 Bugzilla 598: Improvement to Dovecot authenticator handling.
3329 Patch provided by Jan Srzednicki.
3331 TF/05 Leading white space used to be stripped from $spam_report which
3332 wrecked the formatting. Now it is preserved.
3334 TF/06 Save $spam_score, $spam_bar, and $spam_report in spool files, so
3335 that they are available at delivery time.
3337 TF/07 Fix the way ${extract is skipped in the untaken branch of a conditional.
3339 TF/08 TLS error reporting now respects the incoming_interface and
3340 incoming_port log selectors.
3342 TF/09 Produce a more useful error message if an SMTP transport's hosts
3343 setting expands to an empty string.
3345 NM/06 Bugzilla 744: EXPN did not work under TLS.
3346 Patch provided by Phil Pennock.
3348 NM/07 Bugzilla 769: Extraneous comma in usage fprintf
3349 Patch provided by Richard Godbee.
3351 NM/08 Fixed erroneous documentation references to smtp_notquit_acl to be
3352 acl_smtp_notquit, added index entry.
3354 NM/09 Bugzilla 787: Potential buffer overflow in string_format.
3355 Patch provided by Eugene Bujak.
3357 NM/10 Bugzilla 770: Problem on some platforms modifying the len parameter to
3358 accept(). Patch provided by Maxim Dounin.
3360 NM/11 Bugzilla 749: Preserve old behaviour of blanks comparing equal to zero.
3361 Patch provided by Phil Pennock.
3363 NM/12 Bugzilla 497: Correct behaviour of exiwhat when no config exists.
3365 NM/13 Bugzilla 590: Correct handling of Resent-Date headers.
3366 Patch provided by Brad "anomie" Jorsch.
3368 NM/14 Bugzilla 622: Added timeout setting to transport filter.
3369 Patch provided by Dean Brooks.
3371 TK/05 Add native DKIM support (does not depend on external libraries).
3373 NM/15 Bugzilla 854: Removed code that symlinks to pcre as its no longer useful.
3374 Patch provided by Graeme Fowler.
3376 NM/16 Bugzilla 851: Documentation example syntax fix.
3378 NM/17 Changed NOTICE file to remove references to embedded PCRE.
3380 NM/18 Bugzilla 894: Fix issue with very long lines including comments in
3383 NM/19 Bugzilla 745: TLS version reporting.
3384 Patch provided by Phil Pennock.
3386 NM/20 Bugzilla 167: bool: condition support.
3387 Patch provided by Phil Pennock.
3389 NM/21 Bugzilla 665: gnutls_compat_mode to allow compatibility with broken
3390 clients. Patch provided by Phil Pennock.
3392 NM/22 Bugzilla 607: prepend (not append) Resent-Message-ID and Resent-Date.
3393 Patch provided by Brad "anomie" Jorsch.
3395 NM/23 Bugzilla 687: Fix misparses in eximstats.
3396 Patch provided by Heiko Schlittermann.
3398 NM/24 Bugzilla 688: Fix exiwhat to handle log_selector = +pid.
3399 Patch provided by Heiko Schlittermann.
3401 NM/25 Bugzilla 727: Use transport mode as default mode for maildirsize file.
3402 plus update to original patch.
3404 NM/26 Bugzilla 799: Documentation correction for ratelimit.
3406 NM/27 Bugzilla 802: Improvements to local interface IP addr detection.
3407 Patch provided by David Brownlee.
3409 NM/28 Bugzilla 807: Improvements to LMTP delivery logging.
3411 NM/29 Bugzilla 862, 866, 875: Documentation bugfixes.
3413 NM/30 Bugzilla 888: TLS documentation bugfixes.
3415 NM/31 Bugzilla 896: Dovecot buffer overrun fix.
3417 NM/32 Bugzilla 889: Change all instances of "expr" in shell scripts to "expr --"
3418 Unlike the original bugzilla I have changed all shell scripts in src tree.
3420 NM/33 Bugzilla 898: Transport filter timeout fix.
3421 Patch by Todd Rinaldo.
3423 NM/34 Bugzilla 901: Fix sign/unsigned and UTF mismatches.
3424 Patch by Serge Demonchaux.
3426 NM/35 Bugzilla 39: Base64 decode bug fixes.
3427 Patch by Jakob Hirsch.
3429 NM/36 Bugzilla 909: Correct connect() call in dcc code.
3431 NM/37 Bugzilla 910: Correct issue with relaxed/simple handling.
3433 NM/38 Bugzilla 908: Removed NetBSD3 support as no longer needed.
3435 NM/39 Bugzilla 911: Fixed MakeLinks build script.
3441 TK/01 Add preliminary DKIM support. Currently requires a forked version of
3442 ALT-N's libdkim that I have put here:
3443 http://duncanthrax.net/exim-experimental/
3445 Note to Michael Haardt: I had to rename some vars in sieve.c. They
3446 were called 'true' and it seems that C99 defines that as a reserved
3447 keyword to be used with 'bool' variable types. That means you could
3448 not include C99-style headers which use bools without triggering
3449 build errors in sieve.c.
3451 NM/01 Bugzilla 592: --help option is handled incorrectly if exim is invoked
3452 as mailq or other aliases. Changed the --help handling significantly
3453 to do whats expected. exim_usage() emits usage/help information.
3455 SC/01 Added the -bylocaldomain option to eximstats.
3457 NM/02 Bugzilla 619: Defended against bad data coming back from gethostbyaddr.
3459 NM/03 Bugzilla 613: Documentation fix for acl_not_smtp.
3461 NM/04 Bugzilla 628: PCRE update to 7.4 (work done by John Hall).
3467 PH/01 Another patch from the Sieve maintainer.
3469 PH/02 When an IPv6 address is converted to a string for single-key lookup
3470 in an address list (e.g. for an item such as "net24-dbm;/net/works"),
3471 dots are used instead of colons so that keys in lsearch files need not
3472 contain colons. This was done some time before quoting was made available
3473 in lsearch files. However, iplsearch files do require colons in IPv6 keys
3474 (notated using the quote facility) so as to distinguish them from IPv4
3475 keys. This meant that lookups for IP addresses in host lists did not work
3476 for iplsearch lookups.
3478 This has been fixed by arranging for IPv6 addresses to be expressed with
3479 colons if the lookup type is iplsearch. This is not incompatible, because
3480 previously such lookups could never work.
3482 The situation is now rather anomalous, since one *can* have colons in
3483 ordinary lsearch keys. However, making the change in all cases is
3484 incompatible and would probably break a number of configurations.
3486 TK/01 Change PRVS address formatting scheme to reflect latests BATV draft
3489 MH/01 The "spam" ACL condition code contained a sscanf() call with a %s
3490 conversion specification without a maximum field width, thereby enabling
3491 a rogue spamd server to cause a buffer overflow. While nobody in their
3492 right mind would setup Exim to query an untrusted spamd server, an
3493 attacker that gains access to a server running spamd could potentially
3494 exploit this vulnerability to run arbitrary code as the Exim user.
3496 TK/02 Bugzilla 502: Apply patch to make the SPF-Received: header use
3497 $primary_hostname instead of what libspf2 thinks the hosts name is.
3499 MH/02 The dsearch lookup now uses lstat(2) instead of stat(2) to look for
3500 a directory entry by the name of the lookup key. Previously, if a
3501 symlink pointed to a non-existing file or a file in a directory that
3502 Exim lacked permissions to read, a lookup for a key matching that
3503 symlink would fail. Now it is enough that a matching directory entry
3504 exists, symlink or not. (Bugzilla 503.)
3506 PH/03 The body_linecount and body_zerocount variables are now exported in the
3509 PH/04 Added the $dnslist_matched variable.
3511 PH/05 Unset $tls_cipher and $tls_peerdn before making a connection as a client.
3512 This means they are set thereafter only if the connection becomes
3515 PH/06 Added the client_condition to authenticators so that some can be skipped
3516 by clients under certain conditions.
3518 PH/07 The error message for a badly-placed control=no_multiline_responses left
3519 "_responses" off the end of the name.
3521 PH/08 Added -Mvc to output a copy of a message in RFC 2822 format.
3523 PH/09 Tidied the code for creating ratelimiting keys, creating them explicitly
3524 (without spaces) instead of just copying the configuration text.
3526 PH/10 Added the /noupdate option to the ratelimit ACL condition.
3528 PH/11 Added $max_received_linelength.
3530 PH/12 Added +ignore_defer and +include_defer to host lists.
3532 PH/13 Installed PCRE version 7.2. This needed some changes because of the new
3533 way in which PCRE > 7.0 is built.
3535 PH/14 Implemented queue_only_load_latch.
3537 PH/15 Removed an incorrect (int) cast when reading the value of SIZE in a
3538 MAIL command. The effect was to mangle the value on 64-bit systems.
3540 PH/16 Another patch from the Sieve maintainer.
3542 PH/17 Added the NOTQUIT ACL, based on a patch from Ted Cooper.
3544 PH/18 If a system quota error occurred while trying to create the file for
3545 a maildir delivery, the message "Mailbox is full" was not appended to the
3546 bounce if the delivery eventually timed out. Change 4.67/27 below applied
3547 only to a quota excession during the actual writing of the file.
3549 PH/19 It seems that peer DN values may contain newlines (and other non-printing
3550 characters?) which causes problems in log lines. The DN values are now
3551 passed through string_printing() before being added to log lines.
3553 PH/20 Added the "servers=" facility to MySQL and PostgreSQL lookups. (Oracle
3554 and InterBase are left for another time.)
3556 PH/21 Added message_body_newlines option.
3558 PH/22 Guard against possible overflow in moan_check_errorcopy().
3560 PH/23 POSIX allows open() to be a macro; guard against that.
3562 PH/24 If the recipient of an error message contained an @ in the local part
3563 (suitably quoted, of course), incorrect values were put in $domain and
3564 $local_part during the evaluation of errors_copy.
3570 MH/01 Fix for bug #448, segfault in Dovecot authenticator when interface_address
3571 is unset (happens when testing with -bh and -oMi isn't used). Thanks to
3574 PH/01 Added a new log selector smtp_no_mail, to log SMTP sessions that do not
3575 issue a MAIL command.
3577 PH/02 In an ACL statement such as
3579 deny dnslists = X!=127.0.0.2 : X=127.0.0.2
3581 if a client was not listed at all, or was listed with a value other than
3582 127.0.0.2, in the X list, but was listed with 127.0.0.2 in the Y list,
3583 the condition was not true (as it should be), so access was not denied.
3584 The bug was that the ! inversion was incorrectly passed on to the second
3585 item. This has been fixed.
3587 PH/03 Added additional dnslists conditions == and =& which are different from
3588 = and & when the dns lookup returns more than one IP address.
3590 PH/04 Added gnutls_require_{kx,mac,protocols} to give more control over the
3591 cipher suites used by GnuTLS. These options are ignored by OpenSSL.
3593 PH/05 After discussion on the list, added a compile time option ENABLE_DISABLE_
3594 FSYNC, which compiles an option called disable_fsync that allows for
3595 bypassing fsync(). The documentation is heavily laced with warnings.
3597 SC/01 Updated eximstats to collate all SpamAssassin rejects into one bucket.
3599 PH/06 Some tidies to the infrastructure of the Test Suite that is concerned
3600 with the auxiliary C programs that it uses: (1) Arrange for BIND_8_COMPAT
3601 to be defined when compiling on OSX (Darwin); (2) Tidies to the Makefile,
3602 including adding "make clean"; (3) Added -fPIC when compiling the test
3603 dynamically loaded module, to get rid of a warning.
3605 MH/02 Fix for bug #451, causing paniclog entries to be written if a bounce
3606 message fails, move_frozen_messages = true and ignore_bounce_errors_after
3607 = 0s. The bug is otherwise harmless.
3609 PH/07 There was a bug in the dovecot authenticator such that the value of
3610 $auth1 could be overwritten, and so not correctly preserved, after a
3611 successful authentication. This usually meant that the value preserved by
3612 the server_setid option was incorrect.
3614 PH/08 Added $smtp_count_at_connection_start, deliberately with a long name.
3616 PH/09 Installed PCRE release 7.0.
3618 PH/10 The acl_not_smtp_start ACL was, contrary to the documentation, not being
3619 run for batched SMTP input. It is now run at the start of every message
3620 in the batch. While fixing this I discovered that the process information
3621 (output by running exiwhat) was not always getting set for -bs and -bS
3622 input. This is fixed, and it now also says "batched" for BSMTP.
3624 PH/11 Added control=no_pipelining.
3626 PH/12 Added $sending_ip_address and $sending_port (mostly Magnus Holmgren's
3627 patch, slightly modified), and move the expansion of helo_data till after
3628 the connection is made in the smtp transport (so it can use these
3631 PH/13 Added ${rfc2047d: to decoded RFC 2047 strings.
3633 PH/14 Added log_selector = +pid.
3635 PH/15 Flush SMTP output before delaying, unless control=no_delay_flush is set.
3637 PH/16 Add ${if forany and ${if forall.
3639 PH/17 Added dsn_from option to vary the From: line in DSNs.
3641 PH/18 Flush SMTP output before performing a callout, unless control =
3642 no_callout_flush is set.
3644 PH/19 Change 4.64/PH/36 introduced a bug: when address_retry_include_sender
3645 was true (the default) a successful delivery failed to delete the retry
3646 item, thus causing premature timeout of the address. The bug is now
3649 PH/20 Added hosts_avoid_pipelining to the smtp transport.
3651 PH/21 Long custom messages for fakedefer and fakereject are now split up
3652 into multiline responses in the same way that messages for "deny" and
3653 other ACL rejections are.
3655 PH/22 Applied Jori Hamalainen's speed-up changes and typo fixes to exigrep,
3656 with slight modification.
3658 PH/23 Applied sieve patches from the maintainer "tracking the latest notify
3659 draft, changing the syntax and factoring some duplicate code".
3661 PH/24 When the log selector "outgoing_port" was set, the port was shown as -1
3662 for deliveries of the second and subsequent messages over the same SMTP
3665 PH/25 Applied Magnus Holmgren's patch for ${addresses, ${map, ${filter, and
3666 ${reduce, with only minor "tidies".
3668 SC/02 Applied Daniel Tiefnig's patch to improve the '($parent) =' pattern match.
3670 PH/26 Added a "continue" ACL modifier that does nothing, for the benefit of its
3671 expansion side effects.
3673 PH/27 When a message times out after an over-quota error from an Exim-imposed
3674 quota, the bounce message says "mailbox is full". This message was not
3675 being given when it was a system quota that was exceeded. It now should
3678 MH/03 Made $recipients available in local_scan(). local_scan() already has
3679 better access to the recipient list through recipients_list[], but
3680 $recipients can be useful in postmaster-provided expansion strings.
3682 PH/28 The $smtp_command and $smtp_command_argument variables were not correct
3683 in the case of a MAIL command with additional options following the
3684 address, for example: MAIL FROM:<foo@bar> SIZE=1234. The option settings
3685 were accidentally chopped off.
3687 PH/29 SMTP synchronization checks are implemented when a command is read -
3688 there is a check that no more input is waiting when there shouldn't be
3689 any. However, for some commands, a delay in an ACL can mean that it is
3690 some time before the response is written. In this time, more input might
3691 arrive, invalidly. So now there are extra checks after an ACL has run for
3692 HELO/EHLO and after the predata ACL, and likewise for MAIL and RCPT when
3693 pipelining has not been advertised.
3695 PH/30 MH's patch to allow iscntrl() characters to be list separators.
3697 PH/31 Unlike :fail:, a custom message specified with :defer: was not being
3698 returned in the SMTP response when smtp_return_error_details was false.
3699 This has been fixed.
3701 PH/32 Change the Dovecot authenticator to use read() and write() on the socket
3702 instead of the C I/O that was originally supplied, because problems were
3703 reported on Solaris.
3705 PH/33 Compile failed with OpenSSL 0.9.8e. This was due to a coding error in
3706 Exim which did not show up earlier: it was assuming that a call to
3707 SSL_CTX_set_info_callback() might give an error value. In fact, there is
3708 no error. In previous releases of OpenSSL, SSL_CTX_set_info_callback()
3709 was a macro that became an assignment, so it seemed to work. This has
3710 changed to a proper function call with a void return, hence the compile
3711 error. Exim's code has been fixed.
3713 PH/34 Change HDA_SIZE in oracle.c from 256 to 512. This is needed for 64-bit
3716 PH/35 Applied a patch from the Sieve maintainer which fixes a bug in "notify".
3718 PH/36 Applied John Jetmore's patch to add -v functionality to exigrep.
3720 PH/37 If a message is not accepted after it has had an id assigned (e.g.
3721 because it turns out to be too big or there is a timeout) there is no
3722 "Completed" line in the log. When some messages of this type were
3723 selected by exigrep, they were listed as "not completed". Others were
3724 picked up by some special patterns. I have improved the selection
3725 criteria to be more general.
3727 PH/38 The host_find_failed option in the manualroute router can now be set
3728 to "ignore", to completely ignore a host whose IP address cannot be
3729 found. If all hosts are ignored, the behaviour is controlled by the new
3730 host_all_ignored option.
3732 PH/39 In a list of hosts for manualroute, if one item (either because of multi-
3733 homing or because of multiple MX records with /mx) generated more than
3734 one IP address, and the following item turned out to be the local host,
3735 all the secondary addresses of the first item were incorrectly removed
3736 from the list, along with the local host and any following hosts (which
3737 is what is supposed to happen).
3739 PH/40 When Exim receives a message, it writes the login name, uid, and gid of
3740 whoever called Exim into the -H file. In the case of the daemon it was
3741 behaving confusingly. When first started, it used values for whoever
3742 started the daemon, but after a SIGHUP it used the Exim user (because it
3743 calls itself on a restart). I have changed the code so that it now always
3746 PH/41 (Following a suggestion from Tony Finch) If all the RCPT commands in a
3747 message are rejected with the same error (e.g. no authentication or bad
3748 sender address), and a DATA command is nevertheless sent (as can happen
3749 with PIPELINING or a stupid MUA), the error message that was given to the
3750 RCPT commands is included in the rejection of the DATA command. This is
3751 intended to be helpful for MUAs that show only the final error to their
3754 PH/42 Another patch from the Sieve maintainer.
3756 SC/02 Eximstats - Differentiate between permanent and temporary rejects.
3757 Eximstats - Fixed some broken HTML links and added missing column headers
3759 Eximstats - Fixed Grand Total Summary Domains, Edomains, and Email
3760 columns for Rejects, Temp Rejects, Ham, and Spam rows.
3762 SC/03 Eximstats - V1.58 Fix to get <> and blackhole to show in edomain tables.
3764 PH/43 Yet another patch from the Sieve maintainer.
3766 PH/44 I found a way to check for a TCP/IP connection going away before sending
3767 the response to the final '.' that terminates a message, but only in the
3768 case where the client has not sent further data following the '.'
3769 (unfortunately, this is allowed). However, in many cases there won't be
3770 any further data because there won't be any more messages to send. A call
3771 to select() can be used: if it shows that the input is "ready", there is
3772 either input waiting, or the socket has been closed. An attempt to read
3773 the next input character can distinguish the two cases. Previously, Exim
3774 would have sent an OK response which the client would never have see.
3775 This could lead to message repetition. This fix should cure that, at
3776 least in a lot of common cases.
3778 PH/45 Do not advertise STARTTLS in response to HELP unless it would be
3779 advertised in response to EHLO.
3785 PH/01 Two more bugs that were introduced by 4.64/PH/07, in addition to the one
3786 fixed by 4.65/MH/01 (is this a record?) are fixed:
3788 (i) An empty string was always treated as zero by the numeric comparison
3789 operators. This behaviour has been restored.
3791 (ii) It is documented that the numeric comparison operators always treat
3792 their arguments as decimal numbers. This was broken in that numbers
3793 starting with 0 were being interpreted as octal.
3795 While fixing these problems I realized that there was another issue that
3796 hadn't been noticed. Values of message_size_limit (both the global option
3797 and the transport option) were treated as octal if they started with 0.
3798 The documentation was vague. These values are now always treated as
3799 decimal, and I will make that clear in the documentation.
3805 TK/01 Disable default definition of HAVE_LINUX_SENDFILE. Clashes with
3806 Linux large file support (_FILE_OFFSET_BITS=64) on older glibc
3809 MH/01 Don't check that the operands of numeric comparison operators are
3810 integers when their expansion is in "skipping" mode (fixes bug
3811 introduced by 4.64-PH/07).
3813 PH/01 If a system filter or a router generates more than SHRT_MAX (32767)
3814 child addresses, Exim now panics and dies. Previously, because the count
3815 is held in a short int, deliveries were likely to be lost. As such a
3816 large number of recipients for a single message is ridiculous
3817 (performance will be very, very poor), I have chosen to impose a limit
3818 rather than extend the field.
3824 TK/01 Bugzilla #401. Fix DK spooling code so that it can overwrite a
3825 leftover -K file (the existence of which was triggered by #402).
3826 While we were at it, introduced process PID as part of the -K
3827 filename. This should rule out race conditions when creating
3830 TK/02 Bugzilla #402. Apply patch from Simon Arlott, speeding up DK signing
3831 processing considerably. Previous code took too long for large mails,
3832 triggering a timeout which in turn triggers #401.
3834 TK/03 Introduced HAVE_LINUX_SENDFILE to os.h-Linux. Currently only used
3835 in the DK code in transports.c. sendfile() is not really portable,
3836 hence the _LINUX specificness.
3838 TF/01 In the add_headers option to the mail command in an Exim filter,
3839 there was a bug that Exim would claim a syntax error in any
3840 header after the first one which had an odd number of characters
3843 PH/01 If a server that rejects MAIL FROM:<> was the target of a sender
3844 callout verification, Exim cached a "reject" for the entire domain. This
3845 is correct for most verifications, but it is not correct for a recipient
3846 verification with use_sender or use_postmaster set, because in that case
3847 the callout does not use MAIL FROM:<>. Exim now distinguishes the special
3848 case of MAIL FROM:<> rejection from other early rejections (e.g.
3849 rejection of HELO). When verifying a recipient using a non-null MAIL
3850 address, the cache is ignored if it shows MAIL FROM:<> rejection.
3851 Whatever the result of the callout, the value of the domain cache is
3852 left unchanged (for any other kind of callout, getting as far as trying
3853 RCPT means that the domain itself is ok).
3855 PH/02 Tidied a number of unused variable and signed/unsigned warnings that
3858 PH/03 On Solaris, an unexpectedly close socket (dropped connection) can
3859 manifest itself as EPIPE rather than ECONNECT. When tidying away a
3860 session, the daemon ignores ECONNECT errors and logs others; it now
3861 ignores EPIPE as well.
3863 PH/04 Applied Nico Erfurth's refactoring patch to tidy up mime.c
3864 (quoted-printable decoding).
3866 PH/05 Applied Nico Erfurth's refactoring patch to tidy up spool_mbox.c, and
3867 later the small subsequent patch to fix an introduced bug.
3869 PH/06 Installed the latest Cygwin Makefile from the Cygwin maintainer.
3871 PH/07 There was no check for overflow in expansions such as ${if >{1}{4096M}}.
3873 PH/08 An error is now given if message_size_limit is specified negative.
3875 PH/09 Applied and tidied up Jakob Hirsch's patch for allowing ACL variables
3876 to be given (somewhat) arbitrary names.
3878 JJ/01 exipick 20060919.0, allow for arbitrary acl_ variables introduced
3881 JJ/02 exipick 20060919.0, --show-vars args can now be regular expressions,
3882 miscellaneous code fixes
3884 PH/10 Added the log_reject_target ACL modifier to specify where to log
3887 PH/11 Callouts were setting the name used for EHLO/HELO from $smtp_active_
3888 hostname. This is wrong, because it relates to the incoming message (and
3889 probably the interface on which it is arriving) and not to the outgoing
3890 callout (which could be using a different interface). This has been
3891 changed to use the value of the helo_data option from the smtp transport
3892 instead - this is what is used when a message is actually being sent. If
3893 there is no remote transport (possible with a router that sets up host
3894 addresses), $smtp_active_hostname is used.
3896 PH/12 Installed Andrey Panin's patch to add a dovecot authenticator. Various
3897 tweaks were necessary in order to get it to work (see also 21 below):
3898 (a) The code assumed that strncpy() returns a negative number on buffer
3899 overflow, which isn't the case. Replaced with Exim's string_format()
3901 (b) There were several signed/unsigned issues. I just did the minimum
3902 hacking in of casts. There is scope for a larger refactoring.
3903 (c) The code used strcasecmp() which is not a standard C function.
3904 Replaced with Exim's strcmpic() function.
3905 (d) The code set only $1; it now sets $auth1 as well.
3906 (e) A simple test gave the error "authentication client didn't specify
3907 service in request". It would seem that Dovecot has changed its
3908 interface. Fortunately there's a specification; I followed it and
3909 changed what the client sends and it appears to be working now.
3911 PH/13 Added $message_headers_raw to provide the headers without RFC 2047
3914 PH/14 Corrected misleading output from -bv when -v was also used. Suppose the
3915 address A is aliased to B and C, where B exists and C does not. Without
3916 -v the output is "A verified" because verification stops after a
3917 successful redirection if more than one address is generated. However,
3918 with -v the child addresses are also verified. Exim was outputting "A
3919 failed to verify" and then showing the successful verification for C,
3920 with its parentage. It now outputs "B failed to verify", showing B's
3921 parentage before showing the successful verification of C.
3923 PH/15 Applied Michael Deutschmann's patch to allow DNS black list processing to
3924 look up a TXT record in a specific list after matching in a combined
3927 PH/16 It seems that the options setting for the resolver (RES_DEFNAMES and
3928 RES_DNSRCH) can affect the behaviour of gethostbyname() and friends when
3929 they consult the DNS. I had assumed they would set it the way they
3930 wanted; and indeed my experiments on Linux seem to show that in some
3931 cases they do (I could influence IPv6 lookups but not IPv4 lookups).
3932 To be on the safe side, however, I have now made the interface to
3933 host_find_byname() similar to host_find_bydns(), with an argument
3934 containing the DNS resolver options. The host_find_byname() function now
3935 sets these options at its start, just as host_find_bydns() does. The smtp
3936 transport options dns_qualify_single and dns_search_parents are passed to
3937 host_find_byname() when gethostbyname=TRUE in this transport. Other uses
3938 of host_find_byname() use the default settings of RES_DEFNAMES
3939 (qualify_single) but not RES_DNSRCH (search_parents).
3941 PH/17 Applied (a modified version of) Nico Erfurth's patch to make
3942 spool_read_header() do less string testing, by means of a preliminary
3943 switch on the second character of optional "-foo" lines. (This is
3944 overdue, caused by the large number of possibilities that now exist.
3945 Originally there were few.) While I was there, I also converted the
3946 str(n)cmp tests so they don't re-test the leading "-" and the first
3947 character, in the hope this might squeeze out yet more improvement.
3949 PH/18 Two problems with "group" syntax in header lines when verifying: (1) The
3950 flag allowing group syntax was set by the header_syntax check but not
3951 turned off, possible causing trouble later; (2) The flag was not being
3952 set at all for the header_verify test, causing "group"-style headers to
3953 be rejected. I have now set it in this case, and also caused header_
3954 verify to ignore an empty address taken from a group. While doing this, I
3955 came across some other cases where the code for allowing group syntax
3956 while scanning a header line wasn't quite right (mostly, not resetting
3957 the flag correctly in the right place). These bugs could have caused
3958 trouble for malformed header lines. I hope it is now all correct.
3960 PH/19 The functions {pwcheck,saslauthd}_verify_password() are always called
3961 with the "reply" argument non-NULL. The code, however (which originally
3962 came from elsewhere) had *some* tests for NULL when it wrote to *reply,
3963 but it didn't always do it. This confused somebody who was copying the
3964 code for some other use. I have removed all the tests.
3966 PH/20 It was discovered that the GnuTLS code had support for RSA_EXPORT, a
3967 feature that was used to support insecure browsers during the U.S. crypto
3968 embargo. It requires special client support, and Exim is probably the
3969 only MTA that supported it -- and would never use it because real RSA is
3970 always available. This code has been removed, because it had the bad
3971 effect of slowing Exim down by computing (never used) parameters for the
3972 RSA_EXPORT functionality.
3974 PH/21 On the advice of Timo Sirainen, added a check to the dovecot
3975 authenticator to fail if there's a tab character in the incoming data
3976 (there should never be unless someone is messing about, as it's supposed
3977 to be base64-encoded). Also added, on Timo's advice, the "secured" option
3978 if the connection is using TLS or if the remote IP is the same as the
3979 local IP, and the "valid-client-cert option" if a client certificate has
3982 PH/22 As suggested by Dennis Davis, added a server_condition option to *all*
3983 authenticators. This can be used for authorization after authentication
3984 succeeds. (In the case of plaintext, it servers for both authentication
3987 PH/23 Testing for tls_required and lost_connection in a retry rule didn't work
3988 if any retry times were supplied.
3990 PH/24 Exim crashed if verify=helo was activated during an incoming -bs
3991 connection, where there is no client IP address to check. In this
3992 situation, the verify now always succeeds.
3994 PH/25 Applied John Jetmore's -Mset patch.
3996 PH/26 Added -bem to be like -Mset, but loading a message from a file.
3998 PH/27 In a string expansion for a processed (not raw) header when multiple
3999 headers of the same name were present, leading whitespace was being
4000 removed from all of them, but trailing whitespace was being removed only
4001 from the last one. Now trailing whitespace is removed from each header
4002 before concatenation. Completely empty headers in a concatenation (as
4003 before) are ignored.
4005 PH/28 Fixed bug in backwards-compatibility feature of PH/09 (thanks to John
4006 Jetmore). It would have mis-read ACL variables from pre-4.61 spool files.
4008 PH/29 [Removed. This was a change that I later backed out, and forgot to
4009 correct the ChangeLog entry (that I had efficiently created) before
4010 committing the later change.]
4012 PH/30 Exim was sometimes attempting to deliver messages that had suffered
4013 address errors (4xx response to RCPT) over the same connection as other
4014 messages routed to the same hosts. Such deliveries are always "forced",
4015 so retry times are not inspected. This resulted in far too many retries
4016 for the affected addresses. The effect occurred only when there were more
4017 hosts than the hosts_max_try setting in the smtp transport when it had
4018 the 4xx errors. Those hosts that it had tried were not added to the list
4019 of hosts for which the message was waiting, so if all were tried, there
4020 was no problem. Two fixes have been applied:
4022 (i) If there are any address or message errors in an SMTP delivery, none
4023 of the hosts (tried or untried) are now added to the list of hosts
4024 for which the message is waiting, so the message should not be a
4025 candidate for sending over the same connection that was used for a
4026 successful delivery of some other message. This seems entirely
4027 reasonable: after all the message is NOT "waiting for some host".
4028 This is so "obvious" that I'm not sure why it wasn't done
4029 previously. Hope I haven't missed anything, but it can't do any
4030 harm, as the worst effect is to miss an optimization.
4032 (ii) If, despite (i), such a delivery is accidentally attempted, the
4033 routing retry time is respected, so at least it doesn't keep
4034 hammering the server.
4036 PH/31 Installed Andrew Findlay's patch to close the writing end of the socket
4037 in ${readsocket because some servers need this prod.
4039 PH/32 Added some extra debug output when updating a wait-xxx database.
4041 PH/33 The hint "could be header name not terminated by colon", which has been
4042 given for certain expansion errors for a long time, was not being given
4043 for the ${if def:h_colon_omitted{... case.
4045 PH/34 The spec says: "With one important exception, whenever a domain list is
4046 being scanned, $domain contains the subject domain." There was at least
4047 one case where this was not true.
4049 PH/35 The error "getsockname() failed: connection reset by peer" was being
4050 written to the panic log as well as the main log, but it isn't really
4051 panic-worthy as it just means the connection died rather early on. I have
4052 removed the panic log writing for the ECONNRESET error when getsockname()
4055 PH/36 After a 4xx response to a RCPT error, that address was delayed (in queue
4056 runs only) independently of the message's sender address. This meant
4057 that, if the 4xx error was in fact related to the sender, a different
4058 message to the same recipient with a different sender could confuse
4059 things. In particular, this can happen when sending to a greylisting
4060 server, but other circumstances could also provoke similar problems.
4061 I have changed the default so that the retry time for these errors is now
4062 based a combination of the sender and recipient addresses. This change
4063 can be overridden by setting address_retry_include_sender=false in the
4066 PH/37 For LMTP over TCP/IP (the smtp transport), error responses from the
4067 remote server are returned as part of bounce messages. This was not
4068 happening for LMTP over a pipe (the lmtp transport), but now it is the
4069 same for both kinds of LMTP.
4071 PH/38 Despite being documented as not happening, Exim was rewriting addresses
4072 in header lines that were in fact CNAMEs. This is no longer the case.
4074 PH/39 If -R or -S was given with -q<time>, the effect of -R or -S was ignored,
4075 and queue runs started by the daemon processed all messages. This has
4076 been fixed so that -R and -S can now usefully be given with -q<time>.
4078 PH/40 Import PCRE release 6.7 (fixes some bugs).
4080 PH/41 Add bitwise logical operations to eval (courtesy Brad Jorsch).
4082 PH/42 Give an error if -q is specified more than once.
4084 PH/43 Renamed the variables $interface_address and $interface_port as
4085 $received_ip_address and $received_port, to make it clear that these
4086 values apply to message reception, and not to the outgoing interface when
4087 a message is delivered. (The old names remain recognized, of course.)
4089 PH/44 There was no timeout on the connect() call when using a Unix domain
4090 socket in the ${readsocket expansion. There now is.
4092 PH/45 Applied a modified version of Brad Jorsch's patch to allow "message" to
4093 be meaningful with "accept".
4095 SC/01 Eximstats V1.43
4096 Bug fix for V1.42 with -h0 specified. Spotted by Chris Lear.
4098 SC/02 Eximstats V1.44
4099 Use a glob alias rather than an array ref in the generated
4100 parser. This improves both readability and performance.
4102 SC/03 Eximstats V1.45 (Marco Gaiarin / Steve Campbell)
4103 Collect SpamAssassin and rejection statistics.
4104 Don't display local sender or destination tables unless
4105 there is data to show.
4106 Added average volumes into the top table text output.
4108 SC/04 Eximstats V1.46
4109 Collect data on the number of addresses (recipients)
4110 as well as the number of messages.
4112 SC/05 Eximstats V1.47
4113 Added 'Message too big' to the list of mail rejection
4114 reasons (thanks to Marco Gaiarin).
4116 SC/06 Eximstats V1.48
4117 Mainlog lines which have GMT offsets and are too short to
4118 have a flag are now skipped.
4120 SC/07 Eximstats V1.49 (Alain Williams)
4121 Added the -emptyok flag.
4123 SC/08 Eximstats V1.50
4124 Fixes for obtaining the IP address from reject messages.
4126 JJ/03 exipick.20061117.2, made header handling as similar to exim as possible
4127 (added [br]h_ prefixes, implemented RFC2047 decoding. Fixed
4128 whitespace changes from 4.64-PH/27
4130 JJ/04 exipick.20061117.2, fixed format and added $message_headers_raw to
4133 JJ/05 exipick.20061117.2, bug fixes (error out sooner when invalid criteria
4134 are found, allow negative numbers in numeric criteria)
4136 JJ/06 exipick.20061117.2, added new $message_body_missing variable
4138 JJ/07 exipick.20061117.2, added $received_ip_address and $received_port
4139 to match changes made in 4.64-PH/43
4141 PH/46 Applied Jori Hamalainen's patch to add features to exiqsumm.
4143 PH/47 Put in an explicit test for a DNS lookup of an address record where the
4144 "domain" is actually an IP address, and force a failure. This locks out
4145 those revolvers/nameservers that support "A-for-A" lookups, in
4146 contravention of the specifications.
4148 PH/48 When a host name was looked up from an IP address, and the subsequent
4149 forward lookup of the name timed out, the host name was left in
4150 $sender_host_name, contrary to the specification.
4152 PH/49 Although default lookup types such as lsearch* or cdb*@ have always been
4153 restricted to single-key lookups, Exim was not diagnosing an error if
4154 * or *@ was used with a query-style lookup.
4156 PH/50 Increased the value of DH_BITS in tls-gnu.c from 768 to 1024.
4158 MH/01 local_scan ABI version incremented to 1.1. It should have been updated
4159 long ago, but noone interested enough thought of it. Let's just say that
4160 the "1.1" means that there are some new functions that weren't there at
4161 some point in the past.
4163 PH/51 Error processing for expansion failure of helo_data from an smtp
4164 transport during callout processing was broken.
4166 PH/52 Applied John Jetmore's patch to allow tls-on-connect and STARTTLS to be
4167 tested/used via the -bh/-bhc/-bs options.
4169 PH/53 Added missing "#include <time.h>" to pcre/pcretest.c (this was a PCRE
4170 bug, fixed in subsequent PCRE releases).
4172 PH/54 Applied Robert Bannocks' patch to avoid a problem with references that
4173 arises when using the Solaris LDAP libraries (but not with OpenLDAP).
4175 PH/55 Check for a ridiculously long file name in exim_dbmbuild.
4181 SC/01 Use a glob alias rather than an array ref in eximstats generated
4182 parser. This improves both readability and performance.
4184 SC/02 Collect SpamAssassin and rejection statistics in eximstats.
4185 Don't display local sender or destination tables in eximstats unless
4186 there is data to show.
4187 Added average volumes into the eximstats top table text output.
4189 SC/03 Collect data on the number of addresses (recipients) as well
4190 as the number of messages in eximstats.
4192 TF/01 Correct an error in the documentation for the redirect router. Exim
4193 does (usually) call initgroups() when daemonizing.
4195 TF/02 Call initgroups() when dropping privilege in exim.c, so that Exim runs
4196 with consistent privilege compared to when running as a daemon.
4198 TF/03 Note in the spec that $authenticated_id is not set for local
4199 submissions from trusted users.
4201 TF/04 The ratelimit per_rcpt option now works correctly in acl_not_smtp.
4202 Thanks to Dean Brooks <dean@iglou.com> for the patch.
4204 TF/05 Make it easier to get SMTP authentication and TLS/SSL support working
4205 by adding some example configuration directives to the default
4206 configuration file. A little bit of work is required to uncomment the
4207 directives and define how usernames and passwords are checked, but
4208 there is now a framework to start from.
4210 PH/01 Added #define LDAP_DEPRECATED 1 to ldap.c because some of the "old"
4211 functions that Exim currently uses aren't defined in ldap.h for OpenLDAP
4212 without this. I don't know how relevant this is to other LDAP libraries.
4214 PH/02 Add the verb name to the "unknown ACL verb" error.
4216 PH/03 Magnus Holmgren's patch for filter_prepend_home.
4218 PH/03 Fixed Bugzilla #101: macro definition between ACLs doesn't work.
4220 PH/04 Applied Magnus Holmgren's patch to fix Bugzilla #98: transport's home
4221 directory not expanded when it should be if an expanded home directory
4222 was set for the address (which is overridden by the transport).
4224 PH/05 Applied Alex Kiernan's patch to fix Bugzilla #99: a problem with
4227 PH/06 Added acl_not_smtp_start, based on Johannes Berg's patch, and set the
4228 bit to forbid control=suppress_local_fixups in the acl_not_smtp ACL,
4229 because it is too late at that time, and has no effect.
4231 PH/07 Changed ${quote_pgsql to quote ' as '' instead of \' because of a
4232 security issue with \' (bugzilla #107). I could not use the
4233 PQescapeStringConn() function, because it needs a PGconn value as one of
4236 PH/08 When testing addresses using -bt, indicate those final addresses that
4237 are duplicates that would not cause an additional delivery. At least one
4238 person was confused, thinking that -bt output corresponded to deliveries.
4239 (Suppressing duplicates isn't a good idea as you lose the information
4240 about possibly different redirections that led to the duplicates.)
4242 PH/09 Applied patch from Erik to use select() instead of poll() in spam.c on
4243 systems where poll() doesn't work, in particular OS X.
4245 PH/10 Added more information to debugging output for retry time not reached.
4247 PH/11 Applied patch from Arkadiusz Miskiewicz to apply a timeout to read
4248 operations in malware.c.
4250 PH/12 Applied patch from Magnus Holmgren to include the "h" tag in Domain Keys
4253 PH/13 If write_rejectlog was set false when logging was sent to syslog with
4254 syslog_duplication set false, log lines that would normally be written
4255 both the the main log and to the reject log were not written to syslog at
4258 PH/14 In the default configuration, change the use of "message" in ACL warn
4259 statements to "add_header".
4261 PH/15 Diagnose a filter syntax error for "seen", "unseen", or "noerror" if not
4262 not followed by a command (e.g. "seen endif").
4264 PH/16 Recognize SMTP codes at the start of "message" in ACLs and after :fail:
4265 and :defer: in a redirect router. Add forbid_smtp_code to suppress the
4268 PH/17 Added extra conditions to the default value of delay_warning_condition
4272 { !eq{$h_list-id:$h_list-post:$h_list-subscribe:}{} } \
4273 { match{$h_precedence:}{(?i)bulk|list|junk} } \
4274 { match{$h_auto-submitted:}{(?i)auto-generated|auto-replied} } \
4277 The Auto-Submitted: and various List- headers are standardised, whereas I
4278 don't think Precedence: ever was.
4280 PH/18 Refactored debugging code in route_finduser() to show more information,
4281 in particular, the error code if getpwnam() issues one.
4283 PH/19 Added PQsetClientEncoding(conn, "SQL_ASCII") to the pgsql code module.
4284 This is apparently needed in addition to the PH/07 change above to avoid
4285 any possible encoding problems.
4287 PH/20 Perl can change the locale. Exim was resetting it after a ${perl call,
4288 but not after initializing Perl.
4290 PH/21 Added a call to PQsetNoticeProcessor() to catch pgsql "notices" and
4291 output them only if debugging. By default they are written stderr,
4292 apparently, which is not desirable.
4294 PH/22 Added Alain Williams' LDAP patch to support setting REFERRALS=off on
4297 JJ/01 exipick: added --reverse (and -R synonym), --random, --size, --sort and
4300 JJ/02 exipick: rewrote --help documentation to hopefully make more clear.
4302 PH/23 Made -oMaa and -oMt work with -bh and -bs to pretend the connection is
4303 authenticated or an ident call has been made. Suppress the default
4304 values for $authenticated_id and $authenticated_sender (but permit -oMai
4305 and -oMas) when testing with -bh.
4307 PH/24 Re-jigged the order of the tests in the default configuration so that the
4308 tests for valid domains and recipients precede the DNS black list and CSA
4309 tests, on the grounds that those ones are more expensive.
4311 PH/25 Exim was not testing for a space following SMTP commands such as EHLO
4312 that require one. Thus, EHLORHUBARB was interpreted as a valid command.
4313 This bug exists in every version of Exim that I still have, right back to
4316 PH/26 (n)wildlsearch lookups are documented as being done case-insensitively.
4317 However, an attempt to turn on case-sensitivity in a regex key by
4318 including (?-i) didn't work because the subject string was already
4319 lowercased, and the effects were non-intuitive. It turns out that a
4320 one-line patch can be used to allow (?-i) to work as expected.
4326 TF/01 Fix the add_header change below (4.61 PH/55) which had a bug that (amongst
4327 other effects) broke the use of negated acl sub-conditions.
4329 PH/01 ${readsocket now supports Internet domain sockets (modified John Jetmore
4332 PH/02 When tcp-wrappers is called from Exim, it returns only "deny" or "allow".
4333 "Deny" causes Exim to reject the incoming connection with a 554 error.
4334 Unfortunately, if there is a major crisis, such as a disk failure,
4335 tcp-wrappers gives "deny", whereas what one would like would be some
4336 kind of temporary error. A kludge has been added to help with this.
4337 Before calling hosts_ctl(), errno is set zero. If the result is "deny", a
4338 554 error is used if errno is still zero or contains ENOENT (which occurs
4339 if either of the /etc/hosts.{allow,deny} files is missing). Otherwise, a
4342 PH/03 Add -lutil to the default FreeBSD LIBS setting.
4344 PH/04 Change PH/19 for 4.61 was too wide. It should not be applied to host
4345 errors. Otherwise a message that provokes a temporary error (when other
4346 messages do not) can cause a whole host to time out.
4348 PH/05 Batch deliveries by appendfile and pipe transports did not work when the
4349 addresses were routed directly to files or pipes from a redirect router.
4350 File deliveries just didn't batch; pipe deliveries might have suffered
4353 PH/06 A failure to get a lock for a hints database would erroneously always say
4354 "Failed to get write lock", even when it was really a read lock.
4356 PH/07 The appendfile transport was creating MBX lock files with a fixed mode
4357 of 0600. This has been changed to use the value of the lockfile_mode
4358 option (which defaults to 0600).
4360 PH/08 Applied small patch from the Sieve maintainer.
4362 PH/09 If maildir_quota_directory_regex was set to exclude (say) the .Trash
4363 folder from quota calculations, a direct delivery into this folder messed
4364 up the contents of the maildirsize file. This was because the regex was
4365 used only to exclude .Trash (or whatever) when the size of the mailbox
4366 was calculated. There was no check that a delivery was happening into an
4367 excluded directory. This bug has been fixed by ignoring all quota
4368 processing for deliveries into excluded directories.
4370 PH/10 Added the maildirfolder_create_regex option to appendfile.
4376 PH/01 The code for finding all the local interface addresses on a FreeBSD
4377 system running IPv6 was broken. This may well have applied to all BSD
4378 systems, as well as to others that have similar system calls. The broken
4379 code found IPv4 interfaces correctly, but gave incorrect values for the
4380 IPv6 interfaces. In particular, ::1 was not found. The effect in Exim was
4381 that it would not match correctly against @[] and not recognize the IPv6
4384 PH/02 The ipliteral router was not recognizing addresses of the form user@
4385 [ipv6:....] because it didn't know about the "ipv6:" prefix.
4387 PH/03 Added disable_ipv6.
4389 PH/04 Changed $reply_address to use the raw form of the headers instead of the
4390 decoded form, because it is most often used to construct To: headers
4391 lines in autoreplies, and the decoded form may well be syntactically
4392 invalid. However, $reply_address has leading white space removed, and all
4393 newlines turned into spaces so that the autoreply transport does not
4396 PH/05 If group was specified without a user on a router, and no group or user
4397 was specified on a transport, the group from the router was ignored.
4399 PH/06 Increased the number of ACL variables to 20 of each type, and arranged
4400 for visible compile-time settings that can be used to change these
4401 numbers, for those that want even more. Backwards compatibility with old
4402 spool files has been maintained. However, going back to a previous Exim
4403 release will lost any variables that are in spool files.
4405 PH/07 Two small changes when running in the test harness: increase delay when
4406 passing a TCP/IP connection to a new process, in case the original
4407 process has to generate a bounce, and remove special handling of
4408 127.0.0.2 (sic), which is no longer necessary.
4410 PH/08 Changed debug output of dbfn_open() flags from numbers to names, so as to
4411 be the same on different OS.
4413 PH/09 Moved a debug statement in filter processing to avoid a race problem when
4416 JJ/01 exipick: fixed bug where -b (brief) output option showed "Vars:"
4417 whether --show-vars was specified or not
4419 JJ/02 exipick: Added support for new ACL variable spool format introduced
4422 PH/10 Fixed another bug related to PH/04 above: if an incoming message had a
4423 syntactically invalid From: or Reply-to: line, and a filter used this to
4424 generate an autoreply, and therefore failed to obtain an address for the
4425 autoreply, Exim could try to deliver to a non-existent relative file
4426 name, causing unrelated and misleading errors. What now happens is that
4427 it logs this as a hard delivery error, but does not attempt to create a
4430 PH/11 The exinext utility has a -C option for testing purposes, but although
4431 the given file was scanned by exinext itself; it wasn't being passed on
4432 when Exim was called.
4434 PH/12 In the smtp transport, treat an explicit ECONNRESET error the same as
4435 an end-of-file indication when reading a command response.
4437 PH/13 Domain literals for IPv6 were not recognized unless IPv6 support was
4438 compiled. In many other places in Exim, IPv6 addresses are always
4439 recognized, so I have changed this. It also means that IPv4 domain
4440 literals of the form [IPV4:n.n.n.n] are now always recognized.
4442 PH/14 When a uid/gid is specified for the queryprogram router, it cannot be
4443 used if the router is not running as root, for example, when verifying at
4444 ACL time, or when using -bh. The debugging output from this situation was
4445 non-existent - all you got was a failure to exec. I have made two
4448 (a) Failures to set uid/gid, the current directory, or a process leader
4449 in a subprocess such as that created by queryprogram now generate
4450 suitable debugging output when -d is set.
4452 (b) The queryprogram router detects when it is not running as root,
4453 outputs suitable debugging information if -d is set, and then runs
4454 the subprocess without attempting to change uid/gid.
4456 PH/15 Minor change to Makefile for building test_host (undocumented testing
4459 PH/16 As discussed on the list in Nov/Dec: Exim no longer looks at the
4460 additional section of a DNS packet that returns MX or SRV records.
4461 Instead, it always explicitly searches for A/AAAA records. This avoids
4462 major problems that occur when a DNS server includes only records of one
4463 type (A or AAAA) in an MX/SRV packet. A byproduct of this change has
4464 fixed another bug: if SRV records were looked up and the corresponding
4465 address records were *not* found in the additional section, the port
4466 values from the SRV records were lost.
4468 PH/17 If a delivery to a pipe, file, or autoreply was deferred, Exim was not
4469 using the correct key (the original address) when searching the retry
4470 rules in order to find which one to use for generating the retry hint.
4472 PH/18 If quota_warn_message contains a From: header, Exim now refrains from
4473 adding the default one. Similarly, if it contains a Reply-To: header, the
4474 errors_reply_to option, if set, is not used.
4476 PH/19 When calculating a retry time, Exim used to measure the "time since
4477 failure" by looking at the "first failed" field in the retry record. Now
4478 it does not use this if it is later than than the arrival time of the
4479 message. Instead it uses the arrival time. This makes for better
4480 behaviour in cases where some deliveries succeed, thus re-setting the
4481 "first failed" field. An example is a quota failure for a huge message
4482 when small messages continue to be delivered. Without this change, the
4483 "time since failure" will always be short, possible causing more frequent
4484 delivery attempts for the huge message than are intended.
4485 [Note: This change was subsequently modified - see PH/04 for 4.62.]
4487 PH/20 Added $auth1, $auth2, $auth3 to contain authentication data (as well as
4488 $1, $2, $3) because the numerical variables can be reset during some
4489 expansion items (e.g. "match"), thereby losing the authentication data.
4491 PH/21 Make -bV show the size of off_t variables so that the test suite can
4492 decide whether to run tests for quotas > 2G.
4494 PH/22 Test the values given for quota, quota_filecount, quota_warn_threshold,
4495 mailbox_size, and mailbox_filecount in the appendfile transport. If a
4496 filecount value is greater than 2G or if a quota value is greater than 2G
4497 on a system where the size of off_t is not greater than 4, a panic error
4500 PH/23 When a malformed item such as 1.2.3/24 appears in a host list, it can
4501 never match. The debug and -bh output now contains an explicit error
4502 message indicating a malformed IPv4 address or mask.
4504 PH/24 An host item such as 1.2.3.4/abc was being treated as the IP address
4505 1.2.3.4 without a mask. Now it is not recognized as an IP address, and
4506 PH/23 above applies.
4508 PH/25 Do not write to syslog when running in the test harness. The only
4509 occasion when this arises is a failure to open the main or panic logs
4510 (for which there is an explicit test).
4512 PH/26 Added the /no_tell option to "control=freeze".
4514 PH/27 If a host name lookup failed very early in a connection, for example, if
4515 the IP address matched host_lookup and the reverse lookup yielded a name
4516 that did not have a forward lookup, an error message of the form "no IP
4517 address found for host xxx.xxx.xxx (during SMTP connection from NULL)"
4518 could be logged. Now it outputs the IP address instead of "NULL".
4520 PH/28 An enabling patch from MH: add new function child_open_exim2() which
4521 allows the sender and the authenticated sender to be set when
4522 submitting a message from within Exim. Since child_open_exim() is
4523 documented for local_scan(), the new function should be too.
4525 PH/29 In GnuTLS, a forced expansion failure for tls_privatekey was not being
4526 ignored. In both GnuTLS and OpenSSL, an expansion of tls_privatekey that
4527 results in an empty string is now treated as unset.
4529 PH/30 Fix eximon buffer overflow bug (Bugzilla #73).
4531 PH/31 Added sender_verify_fail logging option.
4533 PH/32 In November 2003, the code in Exim that added an empty Bcc: header when
4534 needed by RFC 822 but not by RFC 2822 was commented out. I have now
4535 tidied the source and removed it altogether.
4537 PH/33 When a queue run was abandoned because the load average was too high, a
4538 log line was always written; now it is written only if the queue_run log
4539 selector is set. In addition, the log line for abandonment now contains
4540 information about the queue run such as the pid. This is always present
4541 in "start" and "stop" lines but was omitted from the "abandon" line.
4543 PH/34 Omit spaces between a header name and the colon in the error message that
4544 is given when verify = headers_syntax fails (if there are lots of them,
4545 the message gets confusing).
4547 PH/35 Change the default for dns_check_names_pattern to allow slashes within
4548 names, as there are now some PTR records that contain slashes. This check
4549 is only to protect against broken name servers that fall over on strange
4550 characters, so the fact that it applies to all lookups doesn't matter.
4552 PH/36 Now that the new test suite is complete, we can remove some of the
4553 special code in Exim that was needed for the old test suite. For example,
4554 sorting DNS records because real resolvers return them in an arbitrary
4555 order. The new test suite's fake resolver always returns records in the
4558 PH/37 When running in the test harness, use -odi for submitted messages (e.g.
4559 bounces) except when queue_only is set, to avoid logging races between
4560 the different processes.
4562 PH/38 Panic-die if .include specifies a non-absolute path.
4564 PH/39 A tweak to the "H" retry rule from its user.
4566 JJ/03 exipick: Removed parentheses from 'next' and 'last' calls that specified
4567 a label. They prevented compilation on older perls.
4569 JJ/04 exipick: Refactored code to prevent implicit split to @_ which caused
4570 a warning to be raised on newish perls.
4572 JJ/05 exipick: Fixed bug where -bpc always showed a count of all messages
4573 on queue. Changes to match documented behaviour of showing count of
4574 messages matching specified criteria.
4576 PH/40 Changed the default ident timeout from 30s to 5s.
4578 PH/41 Added support for the use of login_cap features, on those BSD systems
4579 that have them, for controlling the resources used by pipe deliveries.
4581 PH/42 The content-scanning code uses fopen() to create files in which to put
4582 message data. Previously it was not paying any attention to the mode of
4583 the files. Exim runs with umask(0) because the rest of the code creates
4584 files with open(), and sets the required mode explicitly. Thus, these
4585 files were ending up world-writeable. This was not a big issue, because,
4586 being within the spool directory, they were not world-accessible. I have
4587 created a function called modefopen, which takes an additional mode
4588 argument. It sets umask(777), creates the file, chmods it to the required
4589 mode, then resets the umask. All the relevant calls to fopen() in the
4590 content scanning code have been changed to use this function.
4592 PH/43 If retry_interval_max is set greater than 24 hours, it is quietly reset
4593 to 24 hours. This avoids potential overflow problems when processing G
4594 and H retry rules. I suspect nobody ever tinkers with this value.
4596 PH/44 Added STRIP_COMMAND=/usr/bin/strip to the FreeBSD Makefile.
4598 PH/45 When the plaintext authenticator is running as a client, the server's
4599 challenges are checked to ensure they are valid base64 strings. By
4600 default, the authentication attempt is cancelled if an invalid string is
4601 received. Setting client_ignore_invalid_base64 true ignores these errors.
4602 The decoded challenge strings are now placed in $auth1, $auth2, etc. as
4603 they are received. Thus, the responses can be made to depend on the
4604 challenges. If an invalid string is ignored, an empty string is placed in
4607 PH/46 Messages that are created by the autoreply transport now contains a
4608 References: header, in accordance with RFCs 2822 and 3834.
4610 PH/47 Added authenticated_sender_force to the smtp transport.
4612 PH/48 The ${prvs expansion was broken on systems where time_t was long long.
4614 PH/49 Installed latest patch from the Sieve maintainer.
4616 PH/50 When an Exim quota was set without a file count quota, and mailbox_size
4617 was also set, the appendfile transport was unnecessarily scanning a
4618 directory of message files (e.g. for maildir delivery) to find the count
4619 of files (along with the size), even though it did not need this
4620 information. It now does the scan only if it needs to find either the
4621 size of the count of files.
4623 PH/51 Added ${time_eval: to convert Exim time strings into seconds.
4625 PH/52 Two bugs concerned with error handling when the smtp transport is
4628 (i) Exim was not creating retry information for temporary errors given
4629 for individual recipients after the DATA command when the smtp transport
4630 was used in LMTP mode. This meant that they could be retried too
4631 frequently, and not timed out correctly.
4633 (ii) Exim was setting the flag that allows error details to be returned
4634 for LMTP errors on RCPT commands, but not for LMTP errors for individual
4635 recipients that were returned after the DATA command.
4637 PH/53 This is related to PH/52, but is more general: for any failing address,
4638 when detailed error information was permitted to be returned to the
4639 sender, but the error was temporary, then after the final timeout, only
4640 "retry timeout exceeded" was returned. Now it returns the full error as
4641 well as "retry timeout exceeded".
4643 PH/54 Added control=allow_auth_unadvertised, as it seems there are clients that
4644 do this, and (what is worse) MTAs that accept it.
4646 PH/55 Added the add_header modified to ACLs. The use of "message" with "warn"
4647 will now be deprecated.
4649 PH/56 New os.c-cygwin from the Cygwin maintainer.
4651 JJ/06 exipick: added --unsorted option to allow unsorted output in all output
4652 formats (previously only available in exim formats via -bpr, -bpru,
4653 and -bpra. Now also available in native and exiqgrep formats)
4655 JJ/07 exipick: added --freeze and --thaw options to allow faster interaction
4656 with very large, slow to parse queues
4658 JJ/08 exipick: added ! as generic prefix to negate any criteria format
4660 JJ/09 exipick: miscellaneous performance enhancements (~24% improvements)
4662 PH/57 Tidies in SMTP dialogue display in debug output: (i) It was not showing
4663 responses to authentication challenges, though it was showing the
4664 challenges; (ii) I've removed the CR characters from the debug output for
4667 PH/58 Allow for the insertion of a newline as well as a space when a string
4668 is turned into more than one encoded-word during RFC 2047 encoding. The
4669 Sieve code now uses this.
4671 PH/59 Added the following errors that can be detected in retry rules: mail_4xx,
4672 data_4xx, lost_connection, tls_required.
4674 PH/60 When a VRFY deferred or FAILED, the log message rather than the user
4675 message was being sent as an SMTP response.
4677 PH/61 Add -l and -k options to exicyclog.
4679 PH/62 When verifying, if an address was redirected to one new address, so that
4680 verification continued, and the new address failed or deferred after
4681 having set something in $address_data, the value of $address_data was not
4682 passed back to the ACL. This was different to the case when no
4683 redirection occurred. The value is now passed back in both cases.
4685 PH/63 Changed the macro HAVE_LOGIN_CAP (see PH/41 for this release above) to
4686 HAVE_SETCLASSRESOURCES because there are different APIs in use that all
4687 use login_cap.h, so on its own it isn't the distinguishing feature. The
4688 new name refers directly to the setclassresources() function.
4690 PH/65 Added configuration files for NetBSD3.
4692 PH/66 Updated OS/Makefile-HP-UX for gcc 4.1.0 with HP-UX 11.
4694 PH/67 Fixed minor infelicity in the sorting of addresses to ensure that IPv6
4695 is preferred over IPv4.
4697 PH/68 The bounce_return_message and bounce_return_body options were not being
4698 honoured for bounces generated during the reception of non-SMTP messages.
4699 In particular, this applied to messages rejected by the ACL. This bug has
4700 been fixed. However, if bounce_return_message is true and bounce_return_
4701 body is false, the headers that are returned for a non-SMTP message
4702 include only those that have been read before the error was detected.
4703 (In the case of an ACL rejection, they have all been read.)
4705 PH/69 The HTML version of the specification is now built in a directory called
4706 spec_html instead of spec.html, because the latter looks like a path with
4707 a MIME-type, and this confuses some software.
4709 PH/70 Catch two compiler warnings in sieve.c.
4711 PH/71 Fixed an obscure and subtle bug (thanks Alexander & Matthias). The
4712 function verify_get_ident() calls ip_connect() to connect a socket, but
4713 if the "connect()" function timed out, ip_connect() used to close the
4714 socket. However, verify_get_ident() also closes the socket later, and in
4715 between Exim writes to the log, which may get opened at this point. When
4716 the socket was closed in ip_connect(), the log could get the same file
4717 descriptor number as the socket. This naturally causes chaos. The fix is
4718 not to close the socket in ip_connect(); the socket should be closed by
4719 the function that creates it. There was only one place in the code where
4720 this was missing, in the iplookup router, which I don't think anybody now
4721 uses, but I've fixed it anyway.
4723 PH/72 Make dns_again_means_nonexist apply to lookups using gethostbyname() as
4724 well as to direct DNS lookups. Otherwise the handling of names in host
4725 lists is inconsistent and therefore confusing.
4731 PH/01 Two changes to the default runtime configuration:
4733 (1) Move the checks for relay_from_hosts and authenticated clients from
4734 after to before the (commented out) DNS black list checks.
4736 (2) Add control=submission to the relay_from_hosts and authenticated
4737 clients checks, on the grounds that messages accepted by these
4738 statements are most likely to be submissions.
4740 PH/02 Several tidies to the handling of ${prvs and ${prvscheck:
4742 (1) Generate an error if the third argument for the ${prvs expansion is
4745 (2) Treat a missing third argument of ${prvscheck as if it were an empty
4748 (3) Reset the variables that are obtained from the first argument of
4749 ${prvscheck and used in the second argument before leaving the code,
4750 because their memory is reclaimed, so using them afterwards may do
4753 (4) Tidy up the code for expanding the arguments of ${prvscheck one by
4754 one (it's much easier than Tom thought :-).
4756 (5) Because of (4), we can now allow for the use of $prvscheck_result
4757 inside the third argument.
4759 PH/03 For some reason, the default setting of PATH when running a command from
4760 a pipe transport was just "/usr/bin". I have changed it to
4763 PH/04 SUPPORT_TRANSLATE_IP_ADDRESS and MOVE_FROZEN_MESSAGES did not cause
4764 anything to be listed in the output from -bV.
4766 PH/05 When a filter generated an autoreply, the entire To: header line was
4767 quoted in the delivery log line, like this:
4769 => >A.N.Other <ano@some.domain> <original@ddress> ...
4771 This has been changed so that it extracts the operative address. There
4772 may be more than one such address. If so, they are comma-separated, like
4775 => >ano@some.domain,ona@other.domain <original@ddress> ...
4777 PH/06 When a client host used a correct literal IP address in a HELO or EHLO
4778 command, (for example, EHLO [1.2.3.4]) and the client's IP address was
4779 not being looked up in the rDNS to get a host name, Exim was showing the
4780 IP address twice in Received: lines, even though the IP addresses were
4781 identical. For example:
4783 Received: from [1.2.3.4] (helo=[1.2.3.4])
4785 However, if the real host name was known, it was omitting the HELO data
4786 if it matched the actual IP address. This has been tidied up so that it
4787 doesn't show the same IP address twice.
4789 PH/07 When both +timestamp and +memory debugging was on, the value given by
4790 $tod_xxx expansions could be wrong, because the tod_stamp() function was
4791 called by the debug printing, thereby overwriting the timestamp buffer.
4792 Debugging no longer uses the tod_stamp() function when +timestamp is set.
4794 PH/08 When the original message was included in an autoreply transport, it
4795 always said "this is a copy of the message, including all the headers",
4796 even if body_only or headers_only was set. It now gives an appropriate
4799 PH/09 Applied a patch from the Sieve maintainer which:
4801 o fixes some comments
4802 o adds the (disabled) notify extension core
4803 o adds some debug output for the result of if/elsif tests
4804 o points to the current vacation draft in the documentation
4805 and documents the missing references header update
4809 o fixes a bug in processing the envelope test (when testing
4810 multiple envelope elements, the last element determined the
4813 PH/10 Exim was violating RFC 3834 ("Recommendations for Automatic Responses to
4814 Electronic Mail") by including:
4816 Auto-submitted: auto-generated
4818 in the messages that it generates (bounce messages and others, such as
4819 warnings). In the case of bounce messages for non-SMTP messages, there was
4820 also a typo: it was using "Auto_submitted" (underscore instead of
4821 hyphen). Since every message generated by Exim is necessarily in response
4822 to another message, thes have all been changed to:
4824 Auto-Submitted: auto-replied
4826 in accordance with these statements in the RFC:
4828 The auto-replied keyword:
4830 - SHOULD be used on messages sent in direct response to another
4831 message by an automatic process,
4833 - MUST NOT be used on manually-generated messages,
4835 - MAY be used on Delivery Status Notifications (DSNs) and Message
4836 Disposition Notifications (MDNs),
4838 - MUST NOT be used on messages generated by automatic or periodic
4839 processes, except for messages which are automatic responses to
4842 PH/11 Added "${if def:sender_address {(envelope-from <$sender_address>)\n\t}}"
4843 to the default Received: header definition.
4845 PH/12 Added log selector acl_warn_skipped (default on).
4847 PH/13 After a successful wildlsearch lookup, discard the values of numeric
4848 variables because (a) they are in the wrong storage pool and (b) even if
4849 they were copied, it wouldn't work properly because of the caching.
4851 PH/14 Add check_rfc2047_length to disable enforcement of RFC 2047 length
4852 checking when decoding. Apparently there are clients that generate
4853 overlong encoded strings. Why am I not surprised?
4855 PH/15 If the first argument of "${if match_address" was not empty, but did not
4856 contain an "@" character, Exim crashed. Now it writes a panic log message
4857 and treats the condition as false.
4859 PH/16 In autoreply, treat an empty string for "once" the same as unset.
4861 PH/17 A further patch from the Sieve maintainer: "Introduce the new Sieve
4862 extension "envelope-auth". The code is finished and in agreement with
4863 other implementations, but there is no documentation so far and in fact,
4864 nobody wrote the draft yet. This extension is currently #undef'ed, thus
4865 not changing the active code.
4867 Print executed "if" and "elsif" statements when debugging is used. This
4868 helps a great deal to understand what a filter does.
4870 Document more things not specified clearly in RFC3028. I had all this
4871 sorted out, when out of a sudden new issues came to my mind. Oops."
4873 PH/18 Exim was not recognizing the "net-" search type prefix in match_ip lists
4876 PH/19 Exim expands the IPv6 address given to -bh to its full non-abbreviated
4877 canonical form (as documented). However, after a host name lookup from
4878 the IP address, check_host() was doing a simple string comparison with
4879 addresses acquired from the DNS when checking that the found name did
4880 have the original IP as one of its addresses. Since any found IPv6
4881 addresses are likely to be in abbreviated form, the comparison could
4882 fail. Luckily, there already exists a function for doing the comparison
4883 by converting both addresses to binary, so now that is used instead of
4884 the text comparison.
4886 PH/20 There was another similar case to PH/19, when a complete host name was
4887 given in a host list; looking up its IP address could give an abbreviated
4888 form, whereas the current host's name might or might not be abbreviated.
4889 The same fix has been applied.
4895 PH/01 The ${base62: operator adjusted itself to base 36 when BASE_62 was
4896 set to 36 (for Darwin and Cygwin), but the ${base62d: operator did not.
4899 PH/02 Two minor problems detected in Cygwin: the os.{c,h} files had lost */ on
4900 the CVS lines, and there was a missing #if HAVE_IPV6 in host.c.
4902 PH/03 Typo: missing ".o" in src/pcre/Makefile.
4904 PH/04 Tighten up "personal" tests: Instead of testing for any "List-"
4905 header line, restrict the check to what is listed in RFCs 2369 and 2929.
4906 Also, for "Auto-Submitted", treat anything other than "no" as
4907 non-personal, in accordance with RFC 3834. (Previously it treated
4908 anything starting "auto-" as non-personal.)
4910 TF/01 The control=submission/name=... option had a problem with syntax
4911 errors if the name included a slash character. The /name= option
4912 now slurps the rest of the string, so it can include any characters
4913 but it must come last in the list of options (after /sender_retain
4916 PH/05 Some modifications to the interface to the fake nameserver for the new
4924 TK/01 Added the "success_on_redirect" address verification option. See
4925 NewStuff for rationale and an example.
4927 PH/01 Added support for SQLite, basic code supplied by David Woodhouse.
4929 PH/02 Patch to exigrep to allow it to work on syslog lines.
4931 PH/03 When creating an mbox file for a virus/spam scan, use fseek() instead of
4932 fread() to skip over the body file's header line, because in Cygwin the
4933 header line is locked and is inaccessible.
4935 PH/04 Added $message_exim_id, ultimately to replace $message_id (they will both
4936 co-exist for some time) to make it clear that it is the Exim ID that is
4937 referenced, not the Message-ID: header line.
4939 PH/05 Replaced all Tom's calls to snprintf() with calls to the internal
4940 string_format() function, because snprintf() does not exist on all
4943 PH/06 The use of forbid_filter_existstest now also locks out the use of the
4944 ${stat: expansion item.
4946 PH/07 Changed "SMTP protocol violation: synchronization error" into "SMTP
4947 protocol synchronization error", to keep the pedants happy.
4949 PH/08 Arrange for USE_INET_NTOA_FIX to be set in config.h for AIX systems as
4950 well as for IRIX systems, when gcc is being used. See the host.c source
4953 PH/09 Installed latest Cygwin configuration files from the Cygwin maintainer.
4955 PH/10 Named domain lists were not working if used in a queue_smtp_domains
4958 PH/11 Added support for the IGNOREQUOTA extension to LMTP, both to the lmtp
4959 transport and to the smtp transport in LMTP mode.
4961 TK/02 Remove one case of BASE64 error detection FTTB (undocumented anyway).
4963 PH/12 There was a missing call to search_tidyup() before the fork() in rda.c to
4964 run a filter in a subprocess. This could lead to confusion in subsequent
4965 lookups in the parent process. There should also be a search_tidyup() at
4966 the end of the subprocess.
4968 PH/13 Previously, if "verify = helo" was set in an ACL, the condition was true
4969 only if the host matched helo_try_verify_hosts, which caused the
4970 verification to occur when the EHLO/HELO command was issued. The ACL just
4971 tested the remembered result. Now, if a previous verification attempt has
4972 not happened, "verify = helo" does it there and then.
4974 JJ/01 exipick: added $message_exim_id variable (see 4.53-PH/04)
4976 TK/03 Fix log output including CR from clamd.
4978 PH/14 A reference to $reply_address when Reply-to: was empty and From: did not
4979 exist provoked a memory error which could cause a segfault.
4981 PH/15 Installed PCRE 6.2
4983 PH/17 Defined BIND_8_COMPAT in the Darwin os.h file.
4985 PH/18 Reversed 4.52/PH/17 because the HP-UX user found it wasn't the cause
4986 of the problem. Specifically, suggested +O2 rather than +O1 for the
4989 PH/19 Added sqlite_lock_timeout option (David Woodhouse's patch).
4991 PH/20 If a delivery was routed to a non-standard port by means of an SRV
4992 record, the port was not correctly logged when the outgoing_port log
4993 selector was set (it logged the transort's default port).
4995 PH/21 Added support for host-specific ports to manualroute, queryprogram,
4996 fallback_hosts, and "hosts" in the smtp transport.
4998 PH/22 If the log selector "outgoing_port" is set, the port is now also given on
4999 host errors such as "Connection refused".
5001 PH/23 Applied a patch to fix problems with exim-4.52 while doing radius
5002 authentication with radiusclient 0.4.9:
5004 - Error returned from rc_read_config was caught wrongly
5005 - Username/password not passed on to radius server due to wrong length.
5007 The presumption is that some radiusclient API changes for 4.51/PH/17
5008 were not taken care of correctly. The code is still untested by me (my
5009 Linux distribution still has 0.3.2 of radiusclient), but it was
5010 contributed by a Radius user.
5012 PH/24 When doing a callout, the value of $domain wasn't set correctly when
5013 expanding the "port" option of the smtp transport.
5015 TK/04 MIME ACL: Fix buffer underrun that occurs when EOF condition is met
5016 while reading a MIME header. Thanks to Tom Hughes for a patch.
5018 PH/24 Include config.h inside local_scan.h so that configuration settings are
5021 PH/25 Make $smtp_command_argument available after all SMTP commands. This means
5022 that in an ACL for RCPT (for example), you can examine exactly what was
5025 PH/26 Exim was recognizing IPv6 addresses of the form [IPv6:....] in EHLO
5026 commands, but it was not correctly comparing the address with the actual
5027 client host address. Thus, it would show the EHLO address in Received:
5028 header lines when this was not necessary.
5030 PH/27 Added the % operator to ${eval:}.
5032 PH/28 Exim tries to create and chdir to its spool directory when it starts;
5033 it should be ignoring failures (because with -C, for example, it has lost
5034 privilege). It wasn't ignoring creation failures other than "already
5037 PH/29 Added "crypteq" to the list of supported features that Exim outputs when
5040 PH/30 Fixed (presumably very longstanding) bug in exim_dbmbuild: if it failed
5041 because an input line was too long, either on its own, or by virtue of
5042 too many continuations, the temporary file was not being removed, and the
5043 return code was incorrect.
5045 PH/31 Missing "BOOL" in function definition in filtertest.c.
5047 PH/32 Applied Sieve patches from the maintainer.
5049 TK/05 Domainkeys: Accomodate for a minor API change in libdomainkeys 0.67.
5051 PH/33 Added "verify = not_blind".
5053 PH/34 There are settings for CHOWN_COMMAND and MV_COMMAND that can be used in
5054 Local/Makefile (with some defaults set). These are used in built scripts
5055 such as exicyclog, but they have never been used in the exim_install
5056 script (though there are many overriding facilities there). I have
5057 arranged that the exim_install script now takes note of these two
5060 PH/35 Installed configuration files for Dragonfly.
5062 PH/36 When a locally submitted message by a trusted user did not contain a
5063 From: header, and the sender address was obtained from -f or from an SMTP
5064 MAIL command, and the trusted user did not use -F to supply a sender
5065 name, $originator_name was incorrectly used when constructing a From:
5066 header. Furthermore, $originator_name was used for submission mode
5067 messages from external hosts without From: headers in a similar way,
5068 which is clearly wrong.
5070 PH/37 Added control=suppress_local_fixups.
5072 PH/38 When log_selector = +received_sender was set, and the addition of the
5073 sender made the log line's construction buffer exactly full, or one byte
5074 less than full, an overflow happened when the terminating "\n" was
5077 PH/39 Added a new log selector, "unknown_in_list", which provokes a log entry
5078 when the result of a list match is failure because a DNS lookup failed.
5080 PH/40 RM_COMMAND is now used in the building process.
5082 PH/41 Added a "distclean" target to the top-level Makefile; it deletes all
5083 the "build-* directories that it finds.
5085 PH/42 (But a TF fix): In a domain list, Exim incorrectly matched @[] if the IP
5086 address in a domain literal was a prefix of an interface address.
5088 PH/43 (Again a TF fix): In the dnslookup router, do not apply widen_domains
5089 when verifying a sender address, unless rewrite_headers is false.
5091 PH/44 Wrote a long comment about why errors_to addresses are verified as
5092 recipients, not senders.
5094 TF/01 Add missing LIBS=-lm to OS/Makefile-OpenBSD which was overlooked when
5095 the ratelimit ACL was added.
5097 PH/45 Added $smtp_command for the full command (cf $smtp_command_argument).
5099 PH/46 Added extra information about PostgreSQL errors to the error string.
5101 PH/47 Added an interface to a fake DNS resolver for use by the new test suite,
5102 avoiding the need to install special zones in a real server. This is
5103 backwards compatible; if it can't find the fake resolver, it drops back.
5104 Thus, both old and new test suites can be run.
5106 TF/02 Added util/ratelimit.pl
5108 TF/03 Minor fix to the ratelimit code to improve its behaviour in case the
5109 clock is set back in time.
5111 TF/04 Fix the ratelimit support in exim_fixdb. Patch provided by Brian
5112 Candler <B.Candler@pobox.com>.
5114 TF/05 The fix for PH/43 was not completely correct; widen_domains is always
5115 OK for addresses that are the result of redirections.
5117 PH/48 A number of further additions for the benefit of the new test suite,
5118 including a fake gethostbyname() that interfaces to the fake DNS resolver
5121 TF/06 The fix for widen_domains has also been applied to qualify_single and
5122 search_parents which are the other dnslookup options that can cause
5125 PH/49 Michael Haardt's randomized retrying, but as a separate retry parameter
5128 PH/50 Make never_users, trusted_users, admin_groups, trusted_groups expandable.
5130 TF/07 Exim produced the error message "an SRV record indicated no SMTP
5131 service" if it encountered an MX record with an empty target hostname.
5132 The message is now "an MX or SRV record indicated no SMTP service".
5134 TF/08 Change PH/13 introduced the possibility that verify=helo may defer,
5135 if the DNS of the sending site is misconfigured. This is quite a
5136 common situation. This change restores the behaviour of treating a
5137 helo verification defer as a failure.
5139 PH/51 If self=fail was set on a router, the bounce message did not include the
5140 actual error message.
5146 TF/01 Added support for Client SMTP Authorization. See NewStuff for details.
5148 PH/01 When a transport filter timed out in a pipe delivery, and the pipe
5149 command itself ended in error, the underlying message about the transport
5150 filter timeout was being overwritten with the pipe command error. Now the
5151 underlying error message should be appended to the second error message.
5153 TK/01 Fix poll() being unavailable on Mac OSX 10.2.
5155 PH/02 Reduce the amount of output that "make" produces by default. Full output
5156 can still be requested.
5158 PH/03 The warning log line about a condition test deferring for a "warn" verb
5159 was being output only once per connection, rather than after each
5160 occurrence (because it was using the same function as for successful
5161 "warn" verbs). This seems wrong, so I have changed it.
5163 TF/02 Two buglets in acl.c which caused Exim to read a few bytes of memory that
5164 it should not have, which might have caused a crash in the right
5165 circumstances, but probably never did.
5167 PH/04 Installed a modified version of Tony Finch's patch to make submission
5168 mode fix the return path as well as the Sender: header line, and to
5169 add a /name= option so that you can make the user's friendly name appear
5172 TF/03 Added the control = fakedefer ACL modifier.
5174 TF/04 Added the ratelimit ACL condition. See NewStuff for details. Thanks to
5175 Mark Lowes for thorough testing.
5177 TK/02 Rewrote SPF support to work with libspf2 versions >1.2.0.
5179 TK/03 Merged latest SRS patch from Miles Wilton.
5181 PH/05 There's a shambles in IRIX6 - it defines EX_OK in unistd.h which conflicts
5182 with the definition in sysexits.h (which is #included earlier).
5183 Fortunately, Exim does not actually use EX_OK. The code used to try to
5184 preserve the sysexits.h value, by assuming that macro definitions were
5185 scanned for macro replacements. I have been disabused of this notion,
5186 so now the code just undefines EX_OK before #including unistd.h.
5188 PH/06 There is a timeout for writing blocks of data, set by, e.g. data_timeout
5189 in the smtp transport. When a block could not be written in a single
5190 write() function, the timeout was being re-applied to each part-write.
5191 This seems wrong - if the receiver was accepting one byte at a time it
5192 would take for ever. The timeout is now adjusted when this happens. It
5193 doesn't have to be particularly precise.
5195 TK/04 Added simple SPF lookup method in EXPERIMENTAL_SPF. See NewStuff for
5196 details. Thanks to Chris Webb <chris@arachsys.com> for the patch!
5198 PH/07 Added "fullpostmaster" verify option, which does a check to <postmaster>
5199 without a domain if the check to <postmaster@domain> fails.
5201 SC/01 Eximstats: added -xls and the ability to specify output files
5202 (patch written by Frank Heydlauf).
5204 SC/02 Eximstats: use FileHandles for outputting results.
5206 SC/03 Eximstats: allow any combination of xls, txt, and html output.
5208 SC/04 Eximstats: fixed display of large numbers with -nvr option
5210 SC/05 Eximstats: fixed merging of reports with empty tables.
5212 SC/06 Eximstats: added the -include_original_destination flag
5214 SC/07 Eximstats: removed tabs and trailing whitespace.
5216 TK/05 Malware: Improve on aveserver error handling. Patch from Alex Miller.
5218 TK/06 MBOX spool code: Add real "From " MBOX separator line
5219 so the .eml file is really in mbox format (even though
5220 most programs do not really care). Patch from Alex Miller.
5222 TK/07 MBOX spool code: Add X-Envelope-From: and X-Envelope-To: headers.
5223 The latter is generated from $received_to and is only set if the
5224 message has one envelope recipient. SA can use these headers,
5225 obviously out-of-the-box. Patch from Alex Miller.
5227 PH/08 The ${def test on a variable was returning false if the variable's
5228 value was "0", contrary to what the specification has always said!
5229 The result should be true unless the variable is empty.
5231 PH/09 The syntax error of a character other than { following "${if
5232 def:variable_name" (after optional whitespace) was not being diagnosed.
5233 An expansion such as ${if def:sender_ident:{xxx}{yyy}} in which an
5234 accidental colon was present, for example, could give incorrect results.
5236 PH/10 Tidied the code in a number of places where the st_size field of a stat()
5237 result is used (not including appendfile, where other changes are about
5240 PH/11 Upgraded appendfile so that quotas larger than 2G are now supported.
5241 This involved changing a lot of size variables from int to off_t. It
5242 should work with maildirs and everything.
5244 TK/08 Apply fix provided by Michael Haardt to prevent deadlock in case of
5245 spamd dying while we are connected to it.
5247 TF/05 Fixed a ${extract error message typo reported by Jeremy Harris
5250 PH/12 Applied Alex Kiernan's patch for the API change for the error callback
5251 function for BDB 4.3.
5253 PH/13 Changed auto_thaw such that it does not apply to bounce messages.
5255 PH/14 Imported PCRE 6.0; this was more than just a trivial operation because
5256 the sources for PCRE have been re-arranged and more files are now
5259 PH/15 The code I had for printing potentially long long variables in PH/11
5260 above was not the best (it lost precision). The length of off_t variables
5261 is now inspected at build time, and an appropriate printing format (%ld
5262 or %lld) is chosen and #defined by OFF_T_FMT. We also define LONGLONG_T
5263 to be "long long int" or "long int". This is needed for the internal
5264 formatting function string_vformat().
5266 PH/16 Applied Matthew Newton's patch to exicyclog: "If log_file_path is set in
5267 the configuration file to be ":syslog", then the script "guesses" where
5268 the logs files are, rather than using the compiled in default. In our
5269 case the guess is not the same as the compiled default, so the script
5270 suddenly stopped working when I started to use syslog. The patch checks
5271 to see if log_file_path is "". If so, it attempts to read it from exim
5272 with no configuration file to get the compiled in version, before it
5273 falls back to the previous guessing code."
5275 TK/09 Added "prvs" and "prvscheck" expansion items. These help a lot with
5276 implementing BATV in an Exim configuration. See NewStuff for the gory
5279 PH/17 Applied Michael Haardt's patch for HP-UX, affecting only the os.h and
5280 Makefile that are specific to HP-UX.
5282 PH/18 If the "use_postmaster" option was set for a recipient callout together
5283 with the "random" option, the postmaster address was used as the MAIL
5284 FROM address for the random test, but not for the subsequent recipient
5285 test. It is now used for both.
5287 PH/19 Applied Michael Haardt's patch to update Sieve to RFC3028bis. "The
5288 patch removes a few documentation additions to RFC 3028, because the
5289 latest draft now contains them. It adds the new en;ascii-case comparator
5290 and a new error check for 8bit text in MIME parts. Comparator and
5291 require names are now matched exactly. I enabled the subaddress
5292 extension, but it is not well tested yet (read: it works for me)."
5294 PH/20 Added macros for time_t as for off_t (see PH/15 above) and used them to
5295 rework some of the code of TK/09 above to avoid the hardwired use of
5296 "%lld" and "long long". Replaced the call to snprintf() with a call to
5299 PH/21 Added some other messages to those in 4.51/PH/42, namely "All relevant MX
5300 records point to non-existent hosts", "retry timeout exceeded", and
5301 "retry time not reached for any host after a long failure period".
5303 PH/22 Fixed some oversights/typos causing bugs when Exim is compiled with
5304 experimental DomainKeys support:
5306 (1) The filter variables $n0-$n9 and $sn0-$sn9 were broken.
5307 (2) On an error such as an illegally used "control", the wrong name for
5308 the control was given.
5310 These problems did NOT occur unless DomainKeys support was compiled.
5312 PH/23 Added daemon_startup_retries and daemon_startup_sleep.
5314 PH/24 Added ${if match_ip condition.
5316 PH/25 Put debug statements on either side of calls to EXIM_DBOPEN() for hints
5317 databases so that it will be absolutely obvious if a crash occurs in the
5318 DB library. This is a regular occurrence (often caused by mis-matched
5321 PH/26 Insert a lot of missing (void) casts for functions such as chown(),
5322 chmod(), fcntl(), sscanf(), and other functions from stdio.h. These were
5323 picked up on a user's system that detects such things. There doesn't seem
5324 to be a gcc warning option for this - only an attribute that has to be
5325 put on the function's prototype. It seems that in Fedora Core 4 they have
5326 set this on a number of new functions. No doubt there will be more in due
5329 PH/27 If a dnslookup or manualroute router is set with verify=only, it need not
5330 specify a transport. However, if an address that was verified by such a
5331 router was the subject of a callout, Exim crashed because it tried to
5332 read the rcpt_include_affixes from the non-existent transport. Now it
5333 just assumes that the setting of that option is false. This bug was
5334 introduced by 4.51/PH/31.
5336 PH/28 Changed -d+all to exclude +memory, because that information is very
5337 rarely of interest, but it makes the output a lot bigger. People tend to
5338 do -d+all out of habit.
5340 PH/29 Removed support for the Linux-libc5 build, as it is obsolete and the
5341 code in os-type was giving problems when libc.so lives in lib64, like on
5344 PH/30 Exim's DNS code uses the original T_xxx names for DNS record times. These
5345 aren't the modern standard, and it seems that some systems' include files
5346 don't always have them. Exim was already checking for some of the newer
5347 ones like T_AAAA, and defining it itself. I've added checks for all the
5348 record types that Exim uses.
5350 PH/31 When using GnuTLS, if the parameters cache file did not exist, Exim was
5351 not automatically generating a new one, as it is supposed to. This
5352 prevented TLS from working. If the file did exist, but contained invalid
5353 data, a new version was generated, as expected. It was only the case of a
5354 non-existent file that was broken.
5356 TK/10 Domainkeys: Fix a bug in verification that caused a crash in conjunction
5357 with a change in libdomainkeys > 0.64.
5359 TK/11 Domainkeys: Change the logic how the "testing" policy flag is retrieved
5360 from DNS. If the selector record carries the flag, it now has
5361 precedence over the domain-wide flag.
5363 TK/12 Cleared some compiler warnings related to SPF, SRS and DK code.
5365 PH/32 In mua_wrapper mode, if an smtp transport configuration error (such as
5366 the use of a port name that isn't defined in /etc/services) occurred, the
5367 message was deferred as in a normal delivery, and thus remained on the
5368 spool, instead of being failed because of the mua_wrapper setting. This
5369 is now fixed, and I tidied up some of the mua_wrapper messages at the
5372 SC/08 Eximstats: whilst parsing the mainlog(s), store information about
5373 the messages in a hash of arrays rather than using individual hashes.
5374 This is a bit cleaner and results in dramatic memory savings, albeit
5375 at a slight CPU cost.
5377 SC/09 Eximstats: added the -show_rt<list> and the -show_dt<list> flags
5378 as requested by Marc Sherman.
5380 SC/10 Eximstats: added histograms for user specified patterns as requested
5383 SC/11 Eximstats: v1.43 - bugfix for pattern histograms with -h0 specified.
5385 PH/33 Patch from the Cygwin maintainer to add "b" to all occurences of
5386 fopen() in the content-scanning modules that did not already have it.
5392 TK/01 Added Yahoo DomainKeys support via libdomainkeys. See
5393 doc/experimental-spec.txt for details. (http://domainkeys.sf.net)
5395 TK/02 Fix ACL "control" statement not being available in MIME ACL.
5397 TK/03 Fix ACL "regex" condition not being available in MIME ACL.
5399 PH/01 Installed a patch from the Sieve maintainer that allows -bf to be used
5400 to test Sieve filters that use "vacation".
5402 PH/02 Installed a slightly modified version of Nikos Mavrogiannopoulos' patch
5403 that changes the way the GnuTLS parameters are stored in the cache file.
5404 The new format can be generated externally. For backward compatibility,
5405 if the data in the cache doesn't make sense, Exim assumes it has read an
5406 old-format file, and it generates new data and writes a new file. This
5407 means that you can't go back to an older release without removing the
5410 PH/03 A redirect router that has both "unseen" and "one_time" set does not
5411 work if there are any delivery delays because "one_time" forces the
5412 parent to be marked "delivered", so its unseen clone is never tried
5413 again. For this reason, Exim now forbids the simultaneous setting of
5416 PH/04 Change 4.11/85 fixed an obscure bug concerned with addresses that are
5417 redirected to themselves ("homonym" addresses). Read the long ChangeLog
5418 entry if you want to know the details. The fix, however, neglected to
5419 consider the case when local delivery batching is involved. The test for
5420 "previously delivered" was not happening when checking to see if an
5421 address could be batched with a previous (undelivered) one; under
5422 certain circumstances this could lead to multiple deliveries to the same
5425 PH/05 Renamed the macro SOCKLEN_T as EXIM_SOCKLEN_T because AIX uses SOCKLEN_T
5426 in its include files, and this causes problems building Exim.
5428 PH/06 A number of "verify =" ACL conditions have no options (e.g. verify =
5429 header_syntax) but Exim was just ignoring anything given after a slash.
5430 In particular, this caused confusion with an attempt to use "verify =
5431 reverse_host_lookup/defer_ok". An error is now given when options are
5432 supplied for verify items that do not have them. (Maybe reverse_host_
5433 lookup should have a defer_ok option, but that's a different point.)
5435 PH/07 Increase the size of the buffer for incoming SMTP commands from 512 (as
5436 defined by RFC 821) to 2048, because there were problems with some AUTH
5437 commands, and RFC 1869 says the size should be increased for extended
5438 SMTP commands that take arguments.
5440 PH/08 Added ${dlfunc dynamically loaded function for expansion (code from Tony
5443 PH/09 Previously, an attempt to use ${perl when it wasn't compiled gave an
5444 "unknown" error; now it says that the functionality isn't in the binary.
5446 PH/10 Added a nasty fudge to try to recognize and flatten LDAP passwords in
5447 an address' error message when a string expansion fails (syntax or
5448 whatever). Otherwise the password may appear in the log. Following change
5449 PH/42 below, there is no longer a chance of it appearing in a bounce
5452 PH/11 Installed exipick version 20050225.0 from John Jetmore.
5454 PH/12 If the last host in a fallback_hosts list was multihomed, only the first
5455 of its addresses was ever tried. (Bugzilla bug #2.)
5457 PH/13 If "headers_add" in a transport didn't end in a newline, Exim printed
5458 the result incorrectly in the debug output. (It correctly added a newline
5459 to what was transported.)
5461 TF/01 Added $received_time.
5463 PH/14 Modified the default configuration to add an acl_smtp_data ACL, with
5464 commented out examples of how to interface to a virus scanner and to
5465 SpamAssassin. Also added commented examples of av_scanner and
5466 spamd_address settings.
5468 PH/15 Further to TK/02 and TK/03 above, tidied up the tables of what conditions
5469 and controls are allowed in which ACLs. There were a couple of minor
5470 errors. Some of the entries in the conditions table (which is a table of
5471 where they are NOT allowed) were getting very unwieldy; rewrote them as a
5472 negation of where the condition IS allowed.
5474 PH/16 Installed updated OS/os.c-cygwin from the Cygwin maintainer.
5476 PH/17 The API for radiusclient changed at release 0.4.0. Unfortunately, the
5477 header file does not have a version number, so I've had to invent a new
5478 value for RADIUS_LIB_TYPE, namely "RADIUSCLIENTNEW" to request the new
5479 API. The code is untested by me (my Linux distribution still has 0.3.2 of
5480 radiusclient), but it was contributed by a Radius user.
5482 PH/18 Installed Lars Mainka's patch for the support of CRL collections in
5483 files or directories, for OpenSSL.
5485 PH/19 When an Exim process that is running as root has to create an Exim log
5486 file, it does so in a subprocess that runs as exim:exim so as to get the
5487 ownership right at creation (otherwise, other Exim processes might see
5488 the file with the wrong ownership). There was no test for failure of this
5489 fork() call, which would lead to the process getting stuck as it waited
5490 for a non-existent subprocess. Forks do occasionally fail when resources
5491 run out. I reviewed all the other calls to fork(); they all seem to check
5494 PH/20 When checking for unexpected SMTP input at connect time (before writing
5495 the banner), Exim was not dealing correctly with a non-positive return
5496 from the read() function. If the client had disconnected by this time,
5497 the result was a log entry for a synchronization error with an empty
5498 string after "input=" when read() returned zero. If read() returned -1
5499 (an event I could not check), uninitialized data bytes were printed.
5500 There were reports of junk text (parts of files, etc) appearing after
5503 PH/21 Added acl_not_smtp_mime to allow for MIME scanning for non-SMTP messages.
5505 PH/22 Added support for macro redefinition, and (re)definition in between
5506 driver and ACL definitions.
5508 PH/23 The cyrus_sasl authenticator was expanding server_hostname, but then
5509 forgetting to use the resulting value; it was using the unexpanded value.
5511 PH/24 The cyrus_sasl authenticator was advertising mechanisms for which it
5512 hadn't been configured. The fix is from Juergen Kreileder, who
5513 understands it better than I do:
5515 "Here's what I see happening with three configured cyrus_sasl
5516 authenticators configured (plain, login, cram-md5):
5518 On startup auth_cyrus_sasl_init() gets called for each of these.
5519 This means three calls to sasl_listmech() without a specified mech_list.
5520 => SASL tests which mechs of all available mechs actually work
5521 => three warnings about OTP not working
5522 => the returned list contains: plain, login, cram-md5, digest-md5, ...
5524 With the patch, sasl_listmech() also gets called three times. But now
5525 SASL's mech_list option is set to the server_mech specified in the the
5526 authenticator. Or in other words, the answer from sasl_listmech()
5527 gets limited to just the mech you're testing for (which is different
5529 => the return list contains just 'plain' or 'login', 'cram-md5' or
5530 nothing depending on the value of ob->server_mech.
5532 I've just tested the patch: Authentication still works fine,
5533 unavailable mechs specified in the exim configuration are still
5534 caught, and the auth.log warnings about OTP are gone."
5536 PH/25 When debugging is enabled, the contents of the command line are added
5537 to the debugging output, even when log_selector=+arguments is not
5540 PH/26 Change scripts/os-type so that when "uname -s" returns just "GNU", the
5541 answer is "GNU", and only if the return is "GNU/something" is the answer
5544 PH/27 $acl_verify_message is now set immediately after the failure of a
5545 verification in an ACL, and so is available in subsequent modifiers. In
5546 particular, the message can be preserved by coding like this:
5548 warn !verify = sender
5549 set acl_m0 = $acl_verify_message
5551 Previously, $acl_verify_message was set only while expanding "message"
5552 and "log_message" when a very denied access.
5554 PH/28 Modified OS/os.c-Linux with
5556 -#ifndef OS_LOAD_AVERAGE
5557 +#if !defined(OS_LOAD_AVERAGE) && defined(__linux__)
5559 to make Exim compile on kfreebsd-gnu. (I'm totally confused about the
5560 nomenclature these days.)
5562 PH/29 Installed patch from the Sieve maintainer that adds the options
5563 sieve_useraddress and sieve_subaddress to the redirect router.
5565 PH/30 In these circumstances:
5566 . Two addresses routed to the same list of hosts;
5567 . First host does not offer TLS;
5568 . First host accepts first address;
5569 . First host gives temporary error to second address;
5570 . Second host offers TLS and a TLS session is established;
5571 . Second host accepts second address.
5572 Exim incorrectly logged both deliveries with the TLS parameters (cipher
5573 and peerdn, if requested) that were in fact used only for the second
5576 PH/31 When doing a callout as part of verifying an address, Exim was not paying
5577 attention to any local part prefix or suffix that was matched by the
5578 router that accepted the address. It now behaves in the same way as it
5579 does for delivery: the affixes are removed from the local part unless
5580 rcpt_include_affixes is set on the transport.
5582 PH/32 Add the sender address, as F=<...>, to the log line when logging a
5583 timeout during the DATA phase of an incoming message.
5585 PH/33 Sieve envelope tests were broken for match types other than :is. I have
5586 applied a patch sanctioned by the Sieve maintainer.
5588 PH/34 Change 4.50/80 broke Exim in that it could no longer handle cases where
5589 the uid or gid is negative. A case of a negative gid caused this to be
5590 noticed. The fix allows for either to be negative.
5592 PH/35 ACL_WHERE_MIME is now declared unconditionally, to avoid too much code
5593 clutter, but the tables that are indexed by ACL_WHERE_xxx values had been
5596 PH/36 The change PH/12 above was broken. Fixed it.
5598 PH/37 Exim used to check for duplicate addresses in the middle of routing, on
5599 the grounds that routing the same address twice would always produce the
5600 same answer. This might have been true once, but it is certainly no
5601 longer true now. Routing a child address may depend on the previous
5602 routing that produced that child. Some complicated redirection strategies
5603 went wrong when messages had multiple recipients, and made Exim's
5604 behaviour dependent on the order in which the addresses were given.
5606 I have moved the duplicate checking until after the routing is complete.
5607 Exim scans the addresses that are assigned to local and remote
5608 transports, and removes any duplicates. This means that more work will be
5609 done, as duplicates will always all be routed, but duplicates are
5610 presumably rare, so I don't expect this is of any significance.
5612 For deliveries to pipes, files, and autoreplies, the duplicate checking
5613 still happens during the routing process, since they are not going to be
5616 PH/38 Installed a patch from Ian Freislich, with the agreement of Tom Kistner.
5617 It corrects a timeout issue with spamd. This is Ian's comment: "The
5618 background is that sometimes spamd either never reads data from a
5619 connection it has accepted, or it never writes response data. The exiscan
5620 spam.[ch] uses a 3600 second timeout on spamd socket reads, further, it
5621 blindly assumes that writes won't block so it may never time out."
5623 PH/39 Allow G after quota size as well as K and M.
5625 PH/40 The value set for $authenticated_id in an authenticator may not contain
5626 binary zeroes or newlines because the value is written to log lines and
5627 to spool files. There was no check on this. Now the value is run through
5628 the string_printing() function so that such characters are converted to
5629 printable escape sequences.
5631 PH/41 $message_linecount is a new variable that contains the total number of
5632 lines in the message. Compare $body_linecount, which is the count for the
5635 PH/42 Exim no longer gives details of delivery errors for specific addresses in
5636 bounce and delay warning messages, except in certain special cases, which
5639 (a) An SMTP error message from a remote host;
5640 (b) A message specified in a :fail: redirection;
5641 (c) A message specified in a "fail" command in a system filter;
5642 (d) A message specified in a FAIL return from the queryprogram router;
5643 (e) A message specified by the cannot_route_message router option.
5645 In these cases only, Exim does include the error details in bounce and
5646 warning messages. There are also a few cases where bland messages such
5647 as "unrouteable address" or "local delivery error" are given.
5649 PH/43 $value is now also set for the "else" part of a ${run expansion.
5651 PH/44 Applied patch from the Sieve maintainer: "The vacation draft is still
5652 being worked on, but at least Exim now implements the latest version to
5655 PH/45 In a pipe transport, although a timeout while waiting for the pipe
5656 process to complete was treated as a delivery failure, a timeout while
5657 writing the message to the pipe was logged, but erroneously treated as a
5658 successful delivery. Such timeouts include transport filter timeouts. For
5659 consistency with the overall process timeout, these timeouts are now
5660 treated as errors, giving rise to delivery failures by default. However,
5661 there is now a new Boolean option for the pipe transport called
5662 timeout_defer, which, if set TRUE, converts the failures into defers for
5663 both kinds of timeout. A transport filter timeout is now identified in
5666 PH/46 The "scripts/Configure-config.h" script calls "make" at one point. On
5667 systems where "make" and "gmake" are different, calling "gmake" at top
5668 level broke things. I've arranged for the value of $(MAKE) to be passed
5669 from the Makefile to this script so that it can call the same version of
5673 A note about Exim versions 4.44 and 4.50
5674 ----------------------------------------
5676 Exim 4.50 was meant to be the next release after 4.43. It contains a lot of
5677 changes of various kinds. As a consequence, a big documentation update was
5678 needed. This delayed the release for rather longer than seemed good, especially
5679 in the light of a couple of (minor) security issues. Therefore, the changes
5680 that fixed bugs were backported into 4.43, to create a 4.44 maintenance
5681 release. So 4.44 and 4.50 are in effect two different branches that both start
5684 I have left the 4.50 change log unchanged; it contains all the changes since
5685 4.43. The change log for 4.44 is below; many of its items are identical to
5686 those for 4.50. This seems to be the most sensible way to preserve the
5687 historical information.
5693 1. Minor wording change to the doc/README.SIEVE file.
5695 2. Change 4.43/35 introduced a bug: if quota_filecount was set, the
5696 computation of the current number of files was incorrect.
5698 3. Closing a stable door: arrange to panic-die if setitimer() ever fails. The
5699 bug fixed in 4.43/37 would have been diagnosed quickly if this had been in
5702 4. Give more explanation in the error message when the command for a transport
5703 filter fails to execute.
5705 5. There are several places where Exim runs a non-Exim command in a
5706 subprocess. The SIGUSR1 signal should be disabled for these processes. This
5707 was being done only for the command run by the queryprogram router. It is
5708 now done for all such subprocesses. The other cases are: ${run, transport
5709 filters, and the commands run by the lmtp and pipe transports.
5711 6. Added CONFIGURE_GROUP build-time option.
5713 7. Some older OS have a limit of 256 on the maximum number of file
5714 descriptors. Exim was using setrlimit() to set 1000 as a large value
5715 unlikely to be exceeded. Change 4.43/17 caused a lot of logging on these
5716 systems. I've change it so that if it can't get 1000, it tries for 256.
5718 8. "control=submission" was allowed, but had no effect, in a DATA ACL. This
5719 was an oversight, and furthermore, ever since the addition of extra
5720 controls (e.g. 4.43/32), the checks on when to allow different forms of
5721 "control" were broken. There should now be diagnostics for all cases when a
5722 control that does not make sense is encountered.
5724 9. Added the /retain_sender option to "control=submission".
5726 10. $recipients is now available in the predata ACL (oversight).
5728 11. Tidy the search cache before the fork to do a delivery from a message
5729 received from the command line. Otherwise the child will trigger a lookup
5730 failure and thereby defer the delivery if it tries to use (for example) a
5731 cached ldap connection that the parent has called unbind on.
5733 12. If verify=recipient was followed by verify=sender in a RCPT ACL, the value
5734 of $address_data from the recipient verification was clobbered by the
5735 sender verification.
5737 13. The value of address_data from a sender verification is now available in
5738 $sender_address_data in subsequent conditions in the ACL statement.
5740 14. Added forbid_sieve_filter and forbid_exim_filter to the redirect router.
5742 15. Added a new option "connect=<time>" to callout options, to set a different
5745 16. If FIXED_NEVER_USERS was defined, but empty, Exim was assuming the uid 0
5746 was its contents. (It was OK if the option was not defined at all.)
5748 17. A "Completed" log line is now written for messages that are removed from
5749 the spool by the -Mrm option.
5751 18. New variables $sender_verify_failure and $recipient_verify_failure contain
5752 information about exactly what failed.
5754 19. Added -dd to debug only the daemon process.
5756 20. Incorporated Michael Haardt's patch to ldap.c for improving the way it
5757 handles timeouts, both on the server side and network timeouts. Renamed the
5758 CONNECT parameter as NETTIMEOUT (but kept the old name for compatibility).
5760 21. The rare case of EHLO->STARTTLS->HELO was setting the protocol to "smtp".
5761 It is now set to "smtps".
5763 22. $host_address is now set to the target address during the checking of
5764 ignore_target_hosts.
5766 23. When checking ignore_target_hosts for an ipliteral router, no host name was
5767 being passed; this would have caused $sender_host_name to have been used if
5768 matching the list had actually called for a host name (not very likely,
5769 since this list is usually IP addresses). A host name is now passed as
5772 24. Changed the calls that set up the SIGCHLD handler in the daemon to use the
5773 code that specifies a non-restarting handler (typically sigaction() in
5774 modern systems) in an attempt to fix a rare and obscure crash bug.
5776 25. Narrowed the window for a race in the daemon that could cause it to ignore
5777 SIGCHLD signals. This is not a major problem, because they are used only to
5778 wake it up if nothing else does.
5780 26. A malformed maildirsize file could cause Exim to calculate negative values
5781 for the mailbox size or file count. Odd effects could occur as a result.
5782 The maildirsize information is now recalculated if the size or filecount
5785 27. Added HAVE_SYS_STATVFS_H to the os.h file for Linux, as it has had this
5786 support for a long time. Removed HAVE_SYS_VFS_H.
5788 28. Installed the latest version of exipick from John Jetmore.
5790 29. In an address list, if the pattern was not a regular expression, an empty
5791 subject address (from a bounce message) matched only if the pattern was an
5792 empty string. Non-empty patterns were not even tested. This was the wrong
5793 because it is perfectly reasonable to use an empty address as part of a
5794 database query. An empty address is now tested by patterns that are
5795 lookups. However, all the other forms of pattern expect the subject to
5796 contain a local part and a domain, and therefore, for them, an empty
5797 address still always fails if the pattern is not itself empty.
5799 30. Exim went into a mad DNS loop when attempting to do a callout where the
5800 host was specified on an smtp transport, and looking it up yielded more
5801 than one IP address.
5803 31. Re-factored the code for checking spool and log partition space into a
5804 function that finds that data and another that does the check. The former
5805 is then used to implement four new variables: $spool_space, $log_space,
5806 $spool_inodes, and $log_inodes.
5808 32. The RFC2047 encoding function was originally intended for short strings
5809 such as real names; it was not keeping to the 75-character limit for
5810 encoded words that the RFC imposes. It now respects the limit, and
5811 generates multiple encoded words if necessary. To be on the safe side, I
5812 have increased the buffer size for the ${rfc2047: expansion operator from
5815 33. It is now permitted to omit both strings after an "if" condition; if the
5816 condition is true, the result is "true". As before, when the second string
5817 is omitted, a false condition yields an empty string. This makes it less
5818 cumbersome to write custom ACL and router conditions.
5820 34. Failure to deliver a bounce message always caused it to be frozen, even if
5821 there was an errors_to setting on the router. The errors_to setting is now
5824 35. If an IPv6 address is given for -bh or -bhc, it is now converted to the
5825 canonical form (fully expanded) before being placed in
5826 $sender_host_address.
5828 36. The table in the code that translates DNS record types into text (T_A to
5829 "A" for instance) was missing entries for NS and CNAME. It is just possible
5830 that this could have caused confusion if both these types were looked up
5831 for the same domain, because the text type is used as part of Exim's
5832 per-process caching. But the chance of anyone hitting this buglet seems
5835 37. The dnsdb lookup has been extended in a number of ways.
5837 (1) There is a new type, "zns", which walks up the domain tree until it
5838 finds some nameserver records. It should be used with care.
5840 (2) There is a new type, "mxh", which is like "mx" except that it returns
5841 just the host names, not the priorities.
5843 (3) It is now possible to give a list of domains (or IP addresses) to be
5844 looked up. The behaviour when one of the lookups defers can be
5845 controlled by a keyword.
5847 (4) It is now possible to specify the separator character for use when
5848 multiple records are returned.
5850 38. The dnslists ACL condition has been extended: it is now possible to supply
5851 a list of IP addresses and/or domains to be looked up in a particular DNS
5854 39. Added log_selector=+queue_time_overall.
5856 40. When running the queue in the test harness, wait just a tad after forking a
5857 delivery process, to get repeatability of debugging output.
5859 41. Include certificate and key file names in error message when GnuTLS fails
5860 to set them up, because the GnuTLS error message doesn't include the name
5861 of the failing file when there is a problem reading it.
5863 42. Allow both -bf and -bF in the same test run.
5865 43. Did the same fix as 41 above for OpenSSL, which had the same infelicity.
5867 44. The "Exiscan patch" is now merged into the mainline Exim source.
5869 45. Sometimes the final signoff response after QUIT could fail to get
5870 transmitted in the non-TLS case. Testing !tls_active instead of tls_active
5871 < 0 before doing a fflush(). This bug looks as though it goes back to the
5872 introduction of TLS in release 3.20, but "sometimes" must have been rare
5873 because the tests only now provoked it.
5875 46. Reset the locale to "C" after calling embedded Perl, in case it was changed
5876 (this can affect the format of dates).
5878 47. exim_tidydb, when checking for the continued existence of a message for
5879 which it has found a message-specific retry record, was not finding
5880 messages that were in split spool directories. Consequently, it was
5881 deleting retry records that should have stayed in existence.
5883 48. Steve fixed some bugs in eximstats.
5885 49. The SPA authentication driver was not abandoning authentication and moving
5886 on to the next authenticator when an expansion was forced to fail,
5887 contradicting the general specification for all authenticators. Instead it
5888 was generating a temporary error. It now behaves as specified.
5890 50. The default ordering of permitted cipher suites for GnuTLS was pessimal
5891 (the order specifies the preference for clients). The order is now AES256,
5892 AES128, 3DES, ARCFOUR128.
5894 51. Small patch to Sieve code - explicitly set From: when generating an
5897 52. Exim crashed if a remote delivery caused a very long error message to be
5898 recorded - for instance if somebody sent an entire SpamAssassin report back
5899 as a large number of 550 error lines. This bug was coincidentally fixed by
5900 increasing the size of one of Exim's internal buffers (big_buffer) that
5901 happened as part of the Exiscan merge. However, to be on the safe side, I
5902 have made the code more robust (and fixed the comments that describe what
5905 53. Now that there can be additional text after "Completed" in log lines (if
5906 the queue_time_overall log selector is set), a one-byte patch to exigrep
5907 was needed to allow it to recognize "Completed" as not the last thing in
5910 54. The LDAP lookup was not handling a return of LDAP_RES_SEARCH_REFERENCE. A
5911 patch that reportedly fixes this has been added. I am not expert enough to
5912 create a test for it. This is what the patch creator wrote:
5914 "I found a little strange behaviour of ldap code when working with
5915 Windows 2003 AD Domain, where users was placed in more than one
5916 Organization Units. When I tried to give exim partial DN, the exit code
5917 of ldap_search was unknown to exim because of LDAP_RES_SEARCH_REFERENCE.
5918 But simultaneously result of request was absolutely normal ldap result,
5919 so I produce this patch..."
5921 Later: it seems that not all versions of LDAP support LDAP_RES_SEARCH_
5922 REFERENCE, so I have modified the code to exclude the patch when that macro
5925 55. Some experimental protocols are using DNS PTR records for new purposes. The
5926 keys for these records are domain names, not reversed IP addresses. The
5927 dnsdb PTR lookup now tests whether its key is an IP address. If not, it
5928 leaves it alone. Component reversal etc. now happens only for IP addresses.
5931 56. Improve error message when ldap_search() fails in OpenLDAP or Solaris LDAP.
5933 57. Double the size of the debug message buffer (to 2048) so that more of very
5934 long debug lines gets shown.
5936 58. The exicyclog utility now does better if the number of log files to keep
5937 exceeds 99. In this case, it numbers them 001, 002 ... instead of 01, 02...
5939 59. Two changes related to the smtp_active_hostname option:
5941 (1) $smtp_active_hostname is now available as a variable.
5942 (2) The default for smtp_banner uses $smtp_active_hostname instead
5943 of $primary_hostname.
5945 60. The host_aton() function is supposed to be passed a string that is known
5946 to be a valid IP address. However, in the case of IPv6 addresses, it was
5947 not checking this. This is a hostage to fortune. Exim now panics and dies
5948 if the condition is not met. A case was found where this could be provoked
5949 from a dnsdb PTR lookup with an IPv6 address that had more than 8
5950 components; fortuitously, this particular loophole had already been fixed
5951 by change 4.50/55 above.
5953 If there are any other similar loopholes, the new check in host_aton()
5954 itself should stop them being exploited. The report I received stated that
5955 data on the command line could provoke the exploit when Exim was running as
5956 exim, but did not say which command line option was involved. All I could
5957 find was the use of -be with a bad dnsdb PTR lookup, and in that case it is
5958 running as the user.
5961 61. There was a buffer overflow vulnerability in the SPA authentication code
5962 (which came originally from the Samba project). I have added a test to the
5963 spa_base64_to_bits() function which I hope fixes it.
5966 62. Configuration update for GNU/Hurd and variations. Updated Makefile-GNU and
5967 os.h-GNU, and added configuration files for GNUkFreeBSD and GNUkNetBSD.
5969 63. The daemon start-up calls getloadavg() while still root for those OS that
5970 need the first call to be done as root, but it missed one case: when
5971 deliver_queue_load_max is set with deliver_drop_privilege. This is
5972 necessary for the benefit of the queue runner, because there is no re-exec
5973 when deliver_drop_privilege is set.
5975 64. A call to exiwhat cut short delays set up by "delay" modifiers in ACLs.
5976 This has been fixed.
5978 65. Caching of lookup data for "hosts =" ACL conditions, when a named host list
5979 was in use, was not putting the data itself into the right store pool;
5980 consequently, it could be overwritten for a subsequent message in the same
5981 SMTP connection. (Fix 4.40/11 dealt with the non-cache case, but overlooked
5984 66. Added hosts_max_try_hardlimit to the smtp transport, default 50.
5986 67. The string_is_ip_address() function returns 0, 4, or 6, for "no an IP
5987 address", "IPv4 address", and "IPv6 address", respectively. Some calls of
5988 the function were treating the return as a boolean value, which happened to
5989 work because 0=false and not-0=true, but is not correct code.
5991 68. The host_aton() function was not handling scoped IPv6 addresses (those
5992 with, for example, "%eth0" on the end) correctly.
5994 69. Fixed some compiler warnings in acl.c for the bitmaps specified with
5995 negated items (that is, ~something) in unsigned ints. Some compilers
5996 apparently mutter when there is no cast.
5998 70. If an address verification called from an ACL failed, and did not produce a
5999 user-specific message (i.e. there was only a "system" message), nothing was
6000 put in $acl_verify_message. In this situation, it now puts the system
6003 71. Change 4.23/11 added synchronization checking at the start of an SMTP
6004 session; change 4.31/43 added the unwanted input to the log line - except
6005 that it did not do this in the start of session case. It now does.
6007 72. After a timeout in a callout SMTP session, Exim still sent a QUIT command.
6008 This is wrong and can cause the other end to generate a synchronization
6009 error if it is another Exim or anything else that does the synchronization
6010 check. A QUIT command is no longer sent after a timeout.
6012 73. $host_lookup_deferred has been added, to make it easier to detect DEFERs
6013 during host lookups.
6015 74. The defer_ok option of callout verification was not working if it was used
6016 when verifying addresses in header lines, that is, for this case:
6018 verify = header_sender/callout=defer_ok
6020 75. A backgrounded daemon closed stdin/stdout/stderr on entry; this meant that
6021 those file descriptors could be used for SMTP connections. If anything
6022 wrote to stderr (the example that came up was "warn" in embedded Perl), it
6023 could be sent to the SMTP client, causing chaos. The daemon now opens
6024 stdin, stdout, and stderr to /dev/null when it puts itself into the
6027 76. Arrange for output from Perl's "warn" command to be written to Exim's main
6028 log by default. The user can override this with suitable Perl magic.
6030 77. The use of log_message on a "discard" ACL verb, which is supposed to add to
6031 the log message when discard triggers, was not working for the DATA ACL or
6032 for the non-SMTP ACL.
6034 78. Error message wording change in sieve.c.
6036 79. If smtp_accept_max_per_host was set, the number of connections could be
6037 restricted to fewer than expected, because the daemon was trying to set up
6038 a new connection before checking whether the processes handling previous
6039 connections had finished. The check for completed processes is now done
6040 earlier. On busy systems, this bug wouldn't be noticed because something
6041 else would have woken the daemon, and it would have reaped the completed
6044 80. If a message was submitted locally by a user whose login name contained one
6045 or more spaces (ugh!), the spool file that Exim wrote was not re-readable.
6046 It caused a spool format error. I have fixed the spool reading code. A
6047 related problem was that the "from" clause in the Received: line became
6048 illegal because of the space(s). It is now covered by ${quote_local_part.
6050 81. Included the latest eximstats from Steve (adds average sizes to HTML Top
6053 82. Updated OS/Makefile-AIX as per message from Mike Meredith.
6055 83. Patch from Sieve maintainer to fix unterminated string problem in
6056 "vacation" handling.
6058 84. Some minor changes to the Linux configuration files to help with other
6059 OS variants using glibc.
6061 85. One more patch for Sieve to update vacation handling to latest spec.
6064 ----------------------------------------------------
6065 See the note above about the 4.44 and 4.50 releases.
6066 ----------------------------------------------------
6072 1. Change 4.43/35 introduced a bug that caused file counts to be
6073 incorrectly computed when quota_filecount was set in an appendfile
6076 2. Closing a stable door: arrange to panic-die if setitimer() ever fails. The
6077 bug fixed in 4.43/37 would have been diagnosed quickly if this had been in
6080 3. Give more explanation in the error message when the command for a transport
6081 filter fails to execute.
6083 4. There are several places where Exim runs a non-Exim command in a
6084 subprocess. The SIGUSR1 signal should be disabled for these processes. This
6085 was being done only for the command run by the queryprogram router. It is
6086 now done for all such subprocesses. The other cases are: ${run, transport
6087 filters, and the commands run by the lmtp and pipe transports.
6089 5. Some older OS have a limit of 256 on the maximum number of file
6090 descriptors. Exim was using setrlimit() to set 1000 as a large value
6091 unlikely to be exceeded. Change 4.43/17 caused a lot of logging on these
6092 systems. I've change it so that if it can't get 1000, it tries for 256.
6094 6. "control=submission" was allowed, but had no effect, in a DATA ACL. This
6095 was an oversight, and furthermore, ever since the addition of extra
6096 controls (e.g. 4.43/32), the checks on when to allow different forms of
6097 "control" were broken. There should now be diagnostics for all cases when a
6098 control that does not make sense is encountered.
6100 7. $recipients is now available in the predata ACL (oversight).
6102 8. Tidy the search cache before the fork to do a delivery from a message
6103 received from the command line. Otherwise the child will trigger a lookup
6104 failure and thereby defer the delivery if it tries to use (for example) a
6105 cached ldap connection that the parent has called unbind on.
6107 9. If verify=recipient was followed by verify=sender in a RCPT ACL, the value
6108 of $address_data from the recipient verification was clobbered by the
6109 sender verification.
6111 10. If FIXED_NEVER_USERS was defined, but empty, Exim was assuming the uid 0
6112 was its contents. (It was OK if the option was not defined at all.)
6114 11. A "Completed" log line is now written for messages that are removed from
6115 the spool by the -Mrm option.
6117 12. $host_address is now set to the target address during the checking of
6118 ignore_target_hosts.
6120 13. When checking ignore_target_hosts for an ipliteral router, no host name was
6121 being passed; this would have caused $sender_host_name to have been used if
6122 matching the list had actually called for a host name (not very likely,
6123 since this list is usually IP addresses). A host name is now passed as
6126 14. Changed the calls that set up the SIGCHLD handler in the daemon to use the
6127 code that specifies a non-restarting handler (typically sigaction() in
6128 modern systems) in an attempt to fix a rare and obscure crash bug.
6130 15. Narrowed the window for a race in the daemon that could cause it to ignore
6131 SIGCHLD signals. This is not a major problem, because they are used only to
6132 wake it up if nothing else does.
6134 16. A malformed maildirsize file could cause Exim to calculate negative values
6135 for the mailbox size or file count. Odd effects could occur as a result.
6136 The maildirsize information is now recalculated if the size or filecount
6139 17. Added HAVE_SYS_STATVFS_H to the os.h file for Linux, as it has had this
6140 support for a long time. Removed HAVE_SYS_VFS_H.
6142 18. Updated exipick to current release from John Jetmore.
6144 19. Allow an empty sender to be matched against a lookup in an address list.
6145 Previously the only cases considered were a regular expression, or an
6148 20. Exim went into a mad DNS lookup loop when doing a callout where the
6149 host was specified on the transport, if the DNS lookup yielded more than
6152 21. The RFC2047 encoding function was originally intended for short strings
6153 such as real names; it was not keeping to the 75-character limit for
6154 encoded words that the RFC imposes. It now respects the limit, and
6155 generates multiple encoded words if necessary. To be on the safe side, I
6156 have increased the buffer size for the ${rfc2047: expansion operator from
6159 22. Failure to deliver a bounce message always caused it to be frozen, even if
6160 there was an errors_to setting on the router. The errors_to setting is now
6163 23. If an IPv6 address is given for -bh or -bhc, it is now converted to the
6164 canonical form (fully expanded) before being placed in
6165 $sender_host_address.
6167 24. Updated eximstats to version 1.33
6169 25. Include certificate and key file names in error message when GnuTLS fails
6170 to set them up, because the GnuTLS error message doesn't include the name
6171 of the failing file when there is a problem reading it.
6173 26. Expand error message when OpenSSL has problems setting up cert/key files.
6176 27. Reset the locale to "C" after calling embedded Perl, in case it was changed
6177 (this can affect the format of dates).
6179 28. exim_tidydb, when checking for the continued existence of a message for
6180 which it has found a message-specific retry record, was not finding
6181 messages that were in split spool directories. Consequently, it was
6182 deleting retry records that should have stayed in existence.
6184 29. eximstats updated to version 1.35
6185 1.34 - allow eximstats to parse syslog lines as well as mainlog lines
6186 1.35 - bugfix such that pie charts by volume are generated correctly
6188 30. The SPA authentication driver was not abandoning authentication and moving
6189 on to the next authenticator when an expansion was forced to fail,
6190 contradicting the general specification for all authenticators. Instead it
6191 was generating a temporary error. It now behaves as specified.
6193 31. The default ordering of permitted cipher suites for GnuTLS was pessimal
6194 (the order specifies the preference for clients). The order is now AES256,
6195 AES128, 3DES, ARCFOUR128.
6197 31. Small patch to Sieve code - explicitly set From: when generating an
6200 32. Exim crashed if a remote delivery caused a very long error message to be
6201 recorded - for instance if somebody sent an entire SpamAssassin report back
6202 as a large number of 550 error lines. This bug was coincidentally fixed by
6203 increasing the size of one of Exim's internal buffers (big_buffer) that
6204 happened as part of the Exiscan merge. However, to be on the safe side, I
6205 have made the code more robust (and fixed the comments that describe what
6208 33. Some experimental protocols are using DNS PTR records for new purposes. The
6209 keys for these records are domain names, not reversed IP addresses. The
6210 dnsdb PTR lookup now tests whether its key is an IP address. If not, it
6211 leaves it alone. Component reversal etc. now happens only for IP addresses.
6214 34. The host_aton() function is supposed to be passed a string that is known
6215 to be a valid IP address. However, in the case of IPv6 addresses, it was
6216 not checking this. This is a hostage to fortune. Exim now panics and dies
6217 if the condition is not met. A case was found where this could be provoked
6218 from a dnsdb PTR lookup with an IPv6 address that had more than 8
6219 components; fortuitously, this particular loophole had already been fixed
6220 by change 4.50/55 or 4.44/33 above.
6222 If there are any other similar loopholes, the new check in host_aton()
6223 itself should stop them being exploited. The report I received stated that
6224 data on the command line could provoke the exploit when Exim was running as
6225 exim, but did not say which command line option was involved. All I could
6226 find was the use of -be with a bad dnsdb PTR lookup, and in that case it is
6227 running as the user.
6230 35. There was a buffer overflow vulnerability in the SPA authentication code
6231 (which came originally from the Samba project). I have added a test to the
6232 spa_base64_to_bits() function which I hope fixes it.
6235 36. The daemon start-up calls getloadavg() while still root for those OS that
6236 need the first call to be done as root, but it missed one case: when
6237 deliver_queue_load_max is set with deliver_drop_privilege. This is
6238 necessary for the benefit of the queue runner, because there is no re-exec
6239 when deliver_drop_privilege is set.
6241 37. Caching of lookup data for "hosts =" ACL conditions, when a named host list
6242 was in use, was not putting the data itself into the right store pool;
6243 consequently, it could be overwritten for a subsequent message in the same
6244 SMTP connection. (Fix 4.40/11 dealt with the non-cache case, but overlooked
6247 38. Sometimes the final signoff response after QUIT could fail to get
6248 transmitted in the non-TLS case. Testing !tls_active instead of tls_active
6249 < 0 before doing a fflush(). This bug looks as though it goes back to the
6250 introduction of TLS in release 3.20, but "sometimes" must have been rare
6251 because the tests only now provoked it.
6257 1. Fixed a longstanding but relatively impotent bug: a long time ago, before
6258 PIPELINING, the function smtp_write_command() used to return TRUE or FALSE.
6259 Now it returns an integer. A number of calls were still expecting a T/F
6260 return. Fortuitously, in all cases, the tests worked in OK situations,
6261 which is the norm. However, things would have gone wrong on any write
6262 failures on the smtp file descriptor. This function is used when sending
6263 messages over SMTP and also when doing verify callouts.
6265 2. When Exim is called to do synchronous delivery of a locally submitted
6266 message (the -odf or -odi options), it no longer closes stderr before doing
6269 3. Implemented the mua_wrapper option.
6271 4. Implemented mx_fail_domains and srv_fail_domains for the dnslookup router.
6273 5. Implemented the functions header_remove(), header_testname(),
6274 header_add_at_position(), and receive_remove_recipient(), and exported them
6277 6. If an ACL "warn" statement specified the addition of headers, Exim already
6278 inserted X-ACL-Warn: at the start if there was no header name. However, it
6279 was not making this test for the second and subsequent header lines if
6280 there were newlines in the string. This meant that an invalid header could
6281 be inserted if Exim was badly configured.
6283 7. Allow an ACL "warn" statement to add header lines at the start or after all
6284 the Received: headers, as well as at the end.
6286 8. Added the rcpt_4xx retry error code.
6288 9. Added postmaster_mailfrom=xxx to callout verification option.
6290 10. Added mailfrom=xxxx to the callout verification option, for verify=
6293 11. ${substr_1_:xxxx} and ${substr__3:xxxx} are now diagnosed as syntax errors
6294 (they previously behaved as ${substr_1_0:xxxx} and ${substr:_0_3:xxxx}).
6296 12. Inserted some casts to stop certain compilers warning when using pointer
6297 differences as field lengths or precisions in printf-type calls (mostly
6298 affecting debugging statements).
6300 13. Added optional readline() support for -be (dynamically loaded).
6302 14. Obscure bug fix: if a message error (e.g. 4xx to MAIL) happened within the
6303 same clock tick as a message's arrival, so that its received time was the
6304 same as the "first fail" time on the retry record, and that message
6305 remained on the queue past the ultimate address timeout, every queue runner
6306 would try a delivery (because it was past the ultimate address timeout) but
6307 after another failure, the ultimate address timeout, which should have then
6308 bounced the address, did not kick in. This was a "< instead of <=" error;
6309 in most cases the first failure would have been in the next clock tick
6310 after the received time, and all would be well.
6312 15. The special items beginning with @ in domain lists (e.g. @mx_any) were not
6313 being recognized when the domain list was tested by the match_domain
6314 condition in an expansion string.
6316 16. Added the ${str2b64: operator.
6318 17. Exim was always calling setrlimit() to set a large limit for the number of
6319 processes, without checking whether the existing limit was already
6320 adequate. (It did check for the limit on file descriptors.) Furthermore,
6321 errors from getrlimit() and setrlimit() were being ignored. Now they are
6322 logged to the main and panic logs, but Exim does carry on, to try to do its
6323 job under whatever limits there are.
6325 18. Imported PCRE 5.0.
6327 19. Trivial typo in log message " temporarily refused connection" (the leading
6330 20. If the log selector return_path_on_delivery was set and an address was
6331 redirected to /dev/null, the delivery process crashed because it assumed
6332 that a return path would always be set for a "successful" delivery. In this
6333 case, the whole delivery is bypassed as an optimization, and therefore no
6336 21. Internal re-arrangement: the function for sending a challenge and reading
6337 a response while authentication was assuming a zero-terminated challenge
6338 string. It's now changed to take a pointer and a length, to allow for
6339 binary data in such strings.
6341 22. Added the cyrus_sasl authenticator (code supplied by MBM).
6343 23. Exim was not respecting finduser_retries when seeking the login of the
6344 uid under which it was called; it was always trying 10 times. (The default
6345 setting of finduser_retries is zero.) Also, it was sleeping after the final
6346 failure, which is pointless.
6348 24. Implemented tls_on_connect_ports.
6350 25. Implemented acl_smtp_predata.
6352 26. If the domain in control=submission is set empty, Exim assumes that the
6353 authenticated id is a complete email address when it generates From: or
6354 Sender: header lines.
6356 27. Added "#define SOCKLEN_T int" to OS/os.h-SCO and OS/os.h-SCO_SV. Also added
6357 definitions to OS/Makefile-SCO and OS/Makefile-SCO_SV that put basename,
6358 chown and chgrp in /bin and hostname in /usr/bin.
6360 28. Exim was keeping the "process log" file open after each use, just as it
6361 does for the main log. This opens the possibility of it remaining open for
6362 long periods when the USR1 signal hits a daemon. Occasional processlog
6363 errors were reported, that could have been caused by this. Anyway, it seems
6364 much more sensible not to leave this file open at all, so that is what now
6367 29. The long-running daemon process does not normally write to the log once it
6368 has entered its main loop, and it closes the log before doing so. This is
6369 so that log files can straightforwardly be renamed and moved. However,
6370 there are a couple of unusual error situations where the daemon does write
6371 log entries, and I had neglected to close the log afterwards.
6373 30. The text of an SMTP error response that was received during a remote
6374 delivery was being truncated at 512 bytes. This is too short for some of
6375 the long messages that one sometimes sees. I've increased the limit to
6378 31. It is now possible to make retry rules that apply only when a message has a
6379 specific sender, in particular, an empty sender.
6381 32. Added "control = enforce_sync" and "control = no_enforce_sync". This makes
6382 it possible to be selective about when SMTP synchronization is enforced.
6384 33. Added "control = caseful_local_part" and "control = "caselower_local_part".
6386 32. Implemented hosts_connection_nolog.
6388 33. Added an ACL for QUIT.
6390 34. Setting "delay_warning=" to disable warnings was not working; it gave a
6393 35. Added mailbox_size and mailbox_filecount to appendfile.
6395 36. Added control = no_multiline_responses to ACLs.
6397 37. There was a bug in the logic of the code that waits for the clock to tick
6398 in the case where the clock went backwards by a substantial amount such
6399 that the microsecond fraction of "now" was more than the microsecond
6400 fraction of "then" (but the whole seconds number was less).
6402 38. Added support for the libradius Radius client library this is found on
6403 FreeBSD (previously only the radiusclient library was supported).
6409 1. When certain lookups returned multiple values in the form name=value, the
6410 quoting of the values was not always being done properly. Specifically:
6411 (a) If the value started with a double quote, but contained no whitespace,
6413 (b) If the value contained whitespace other than a space character (i.e.
6414 tabs or newlines or carriage returns) it was not quoted.
6415 This fix has been applied to the mysql and pgsql lookups by writing a
6416 separate quoting function and calling it from the lookup code. The fix
6417 should probably also be applied to nisplus, ibase and oracle lookups, but
6418 since I cannot test any of those, I have not disturbed their existing code.
6420 2. A hit in the callout cache for a specific address caused a log line with no
6421 reason for rejecting RCPT. Now it says "Previous (cached) callout
6422 verification failure".
6424 3. There was an off-by-one bug in the queryprogram router. An over-long
6425 return line was truncated at 256 instead of 255 characters, thereby
6426 overflowing its buffer with the terminating zero. As well as fixing this, I
6427 have increased the buffer size to 1024 (and made a note to document this).
6429 4. If an interrupt, such as the USR1 signal that is send by exiwhat, arrives
6430 when Exim is waiting for an SMTP response from a remote server, Exim
6431 restarts its select() call on the socket, thereby resetting its timeout.
6432 This is not a problem when such interrupts are rare. Somebody set up a cron
6433 job to run exiwhat every 2 minutes, which is less than the normal select()
6434 timeout (5 or 10 minutes). This meant that the select() timeout never
6435 kicked in because it was always reset. I have fixed this by comparing the
6436 time when an interrupt arrives with the time at the start of the first call
6437 to select(). If more time than the timeout has elapsed, the interrupt is
6438 treated as a timeout.
6440 5. Some internal re-factoring in preparation for the addition of Sieve
6441 extensions (by MH). In particular, the "personal" test is moved to a
6442 separate function, and given an option for scanning Cc: and Bcc: (which is
6443 not set for Exim filters).
6445 6. When Exim created an email address using the login of the caller as the
6446 local part (e.g. when creating a From: or Sender: header line), it was not
6447 quoting the local part when it contained special characters such as @.
6449 7. Installed new OpenBSD configuration files.
6451 8. Reworded some messages for syntax errors in "and" and "or" conditions to
6452 try to make them clearer.
6454 9. Callout options, other than the timeout value, were being ignored when
6455 verifying sender addresses in header lines. For example, when using
6457 verify = header_sender/callout=no_cache
6459 the cache was (incorrectly) being used.
6461 10. Added a missing instance of ${EXE} to the exim_install script; this affects
6462 only the Cygwin environment.
6464 11. When return_path_on_delivery was set as a log selector, if different remote
6465 addresses in the same message used different return paths and parallel
6466 remote delivery occurred, the wrong values would sometimes be logged.
6467 (Whenever a remote delivery process finished, the return path value from
6468 the most recently started remote delivery process was logged.)
6470 12. RFC 3848 specifies standard names for the "with" phrase in Received: header
6471 lines when AUTH and/or TLS are in use. This is the "received protocol"
6472 field. Exim used to use "asmtp" for authenticated SMTP, without any
6473 indication (in the protocol name) for TLS use. Now it follows the RFC and
6474 uses "esmtpa" if the connection is authenticated, "esmtps" if it is
6475 encrypted, and "esmtpsa" if it is both encrypted and authenticated. These
6476 names appear in log lines as well as in Received: header lines.
6478 13. Installed MH's patches for Sieve to add the "copy" and "vacation"
6479 extensions, and comparison tests, and to fix some bugs.
6481 14. Changes to the "personal" filter test:
6483 (1) The test was buggy in that it was just doing the equivalent of
6484 "contains" tests on header lines. For example, if a user's address was
6485 anne@some.where, the "personal" test would incorrectly be true for
6487 To: susanne@some.where
6489 This test is now done by extracting each address from the header in turn,
6490 and checking the entire address. Other tests that are part of "personal"
6491 are now done using regular expressions (for example, to check local parts
6492 of addresses in From: header lines).
6494 (2) The list of non-personal local parts in From: addresses has been
6495 extended to include "listserv", "majordomo", "*-request", and "owner-*",
6496 taken from the Sieve specification recommendations.
6498 (3) If the message contains any header line starting with "List-" it is
6499 treated as non-personal.
6501 (4) The test for "circular" in the Subject: header line has been removed
6502 because it now seems ill-conceived.
6504 15. Minor typos in src/EDITME comments corrected.
6506 16. Installed latest exipick from John Jetmore.
6508 17. If headers_add on a router specified a text string that was too long for
6509 string_sprintf() - that is, longer than 8192 bytes - Exim panicked. The use
6510 of string_sprintf() is now avoided.
6512 18. $message_body_size was not set (it was always zero) when running the DATA
6513 ACL and the local_scan() function.
6515 19. For the "mail" command in an Exim filter, no default was being set for
6516 the once_repeat time, causing a random time value to be used if "once" was
6517 specified. (If the value happened to be <= 0, no repeat happened.) The
6518 default is now 0s, meaning "never repeat". The "vacation" command was OK
6519 (its default is 7d). It's somewhat surprising nobody ever noticed this bug
6520 (I found it when inspecting the code).
6522 20. There is now an overall timeout for performing a callout verification. It
6523 defaults to 4 times the callout timeout, which applies to individual SMTP
6524 commands during the callout. The overall timeout applies when there is more
6525 than one host that can be tried. The timeout is checked before trying the
6526 next host. This prevents very long delays if there are a large number of
6527 hosts and all are timing out (e.g. when the network connections are timing
6528 out). The value of the overall timeout can be changed by specifying an
6529 additional sub-option for "callout", called "maxwait". For example:
6531 verify = sender/callout=5s,maxwait=20s
6533 21. Add O_APPEND to the open() call for maildirsize files (Exim already seeks
6534 to the end before writing, but this should make it even safer).
6536 22. Exim was forgetting that it had advertised PIPELINING for the second and
6537 subsequent messages on an SMTP connection. It was also not resetting its
6538 memory on STARTTLS and an internal HELO.
6540 23. When Exim logs an SMTP synchronization error within a session, it now
6541 records whether PIPELINING has been advertised or not.
6543 24. Added 3 instances of "(long int)" casts to time_t variables that were being
6544 formatted using %ld, because on OpenBSD (and perhaps others), time_t is int
6545 rather than long int.
6547 25. Installed the latest Cygwin configuration files from the Cygwin maintainer.
6549 26. Added the never_mail option to autoreply.
6555 1. A reorganization of the code in order to implement 4.40/8 caused a daemon
6556 crash if the getsockname() call failed; this can happen if a connection is
6557 closed very soon after it is established. The problem was simply in the
6558 order in which certain operations were done, causing Exim to try to write
6559 to the SMTP stream before it had set up the file descriptor. The bug has
6560 been fixed by making things happen in the correct order.
6566 1. If "drop" was used in a DATA ACL, the SMTP output buffer was not flushed
6567 before the connection was closed, thus losing the rejection response.
6569 2. Commented out the definition of SOCKLEN_T in os.h-SunOS5. It is needed for
6570 some early Solaris releases, but causes trouble in current releases where
6571 socklen_t is defined.
6573 3. When std{in,out,err} are closed, re-open them to /dev/null so that they
6576 4. Minor refactoring of os.c-Linux to avoid compiler warning when IPv6 is not
6579 5. Refactoring in expand.c to improve memory usage. Pre-allocate a block so
6580 that releasing the top of it at the end releases what was used for sub-
6581 expansions (unless the block got too big). However, discard this block if
6582 the first thing is a variable or header, so that we can use its block when
6583 it is dynamic (useful for very large $message_headers, for example).
6585 6. Lookups now cache *every* query, not just the most recent. A new, separate
6586 store pool is used for this. It can be recovered when all lookup caches are
6587 flushed. Lookups now release memory at the end of their result strings.
6588 This has involved some general refactoring of the lookup sources.
6590 7. Some code has been added to the store_xxx() functions to reduce the amount
6591 of flapping under certain conditions.
6593 8. log_incoming_interface used to affect only the <= reception log lines. Now
6594 it causes the local interface and port to be added to several more SMTP log
6595 lines, for example "SMTP connection from", and rejection lines.
6597 9. The Sieve author supplied some patches for the doc/README.SIEVE file.
6599 10. Added a conditional definition of _BSD_SOCKLEN_T to os.h-Darwin.
6601 11. If $host_data was set by virtue of a hosts lookup in an ACL, its value
6602 could be overwritten at the end of the current message (or the start of a
6603 new message if it was set in a HELO ACL). The value is now preserved for
6604 the duration of the SMTP connection.
6606 12. If a transport had a headers_rewrite setting, and a matching header line
6607 contained an unqualified address, that address was qualified, even if it
6608 did not match any rewriting rules. The underlying bug was that the values
6609 of the flags that permit the existence of unqualified sender and recipient
6610 addresses in header lines (set by {sender,recipient}_unqualified_hosts for
6611 non-local messages, and by -bnq for local messages) were not being
6612 preserved with the message after it was received.
6614 13. When Exim was logging an SMTP synchronization error, it could sometimes log
6615 "next input=" as part of the text comprising the host identity instead of
6616 the correct text. The code was using the same buffer for two different
6617 strings. However, depending on which order the printing function evaluated
6618 its arguments, the bug did not always show up. Under Linux, for example, my
6619 test suite worked just fine.
6621 14. Exigrep contained a use of Perl's "our" scoping after change 4.31/70. This
6622 doesn't work with some older versions of Perl. It has been changed to "my",
6623 which in any case is probably the better facility to use.
6625 15. A really picky compiler found some instances of statements for creating
6626 error messages that either had too many or two few arguments for the format
6629 16. The size of the buffer for calls to the DNS resolver has been increased
6630 from 1024 to 2048. A larger buffer is needed when performing PTR lookups
6631 for addresses that have a lot of PTR records. This alleviates a problem; it
6632 does not fully solve it.
6634 17. A dnsdb lookup for PTR records that receives more data than will fit in the
6635 buffer now truncates the list and logs the incident, which is the same
6636 action as happens when Exim is looking up a host name and its aliases.
6637 Previously in this situation something unpredictable would happen;
6638 sometimes it was "internal error: store_reset failed".
6640 18. If a server dropped the connection unexpectedly when an Exim client was
6641 using GnuTLS and trying to read a response, the client delivery process
6642 crashed while trying to generate an error log message.
6644 19. If a "warn" verb in an ACL added multiple headers to a message in a single
6645 string, for example:
6647 warn message = H1: something\nH2: something
6649 the text was added as a single header line from Exim's point of view
6650 though it ended up OK in the delivered message. However, searching for the
6651 second and subsequent header lines using $h_h2: did not work. This has been
6652 fixed. Similarly, if a system filter added multiple headers in this way,
6653 the routers could not see them.
6655 20. Expanded the error message when iplsearch is called with an invalid key to
6656 suggest using net-iplsearch in a host list.
6658 21. When running tests using -bh, any delays imposed by "delay" modifiers in
6659 ACLs are no longer actually imposed (and a message to that effect is
6662 22. If a "gecos" field in a passwd entry contained escaped characters, in
6663 particular, if it contained a \" sequence, Exim got it wrong when building
6664 a From: or a Sender: header from that name. A second bug also caused
6665 incorrect handling when an unquoted " was present following a character
6666 that needed quoting.
6668 23. "{crypt}" as a password encryption mechanism for a "crypteq" expansion item
6669 was not being matched caselessly.
6671 24. Arranged for all hyphens in the exim.8 source to be escaped with
6674 25. Change 16 of 4.32, which reversed 71 or 4.31 didn't quite do the job
6675 properly. Recipient callout cache records were still being keyed to include
6676 the sender, even when use_sender was set false. This led to far more
6677 callouts that were necessary. The sender is no longer included in the key
6678 when use_sender is false.
6680 26. Added "control = submission" modifier to ACLs.
6682 27. Added the ${base62d: operator to decode base 62 numbers.
6684 28. dnsdb lookups can now access SRV records.
6686 29. CONFIGURE_OWNER can be set at build time to define an alternative owner for
6687 the configuration file.
6689 30. The debug message "delivering xxxxxx-xxxxxx-xx" is now output in verbose
6690 (-v) mode. This makes the output for a verbose queue run more intelligible.
6692 31. Added a use_postmaster feature to recipient callouts.
6694 32. Added the $body_zerocount variable, containing the number of binary zero
6695 bytes in the message body.
6697 33. The time of last modification of the "new" subdirectory is now used as the
6698 "mailbox time last read" when there is a quota error for a maildir
6701 34. Added string comparison operators lt, lti, le, lei, gt, gti, ge, gei.
6703 35. Added +ignore_unknown as a special item in host lists.
6705 36. Code for decoding IPv6 addresses in host lists is now included, even if
6706 IPv6 support is not being compiled. This fixes a bug in which an IPv6
6707 address was recognized as an IP address, but was then not correctly decoded
6708 into binary, causing unexpected and incorrect effects when compared with
6715 1. Very minor rewording of debugging text in manualroute to say "list of
6716 hosts" instead of "hostlist".
6718 2. If verify=header_syntax was set, and a header line with an unqualified
6719 address (no domain) and a large number of spaces between the end of the
6720 name and the colon was received, the reception process suffered a buffer
6721 overflow, and (when I tested it) crashed. This was caused by some obsolete
6722 code that should have been removed. The fix is to remove it!
6724 3. When running in the test harness, delay a bit after writing a bounce
6725 message to get a bit more predictability in the log output.
6727 4. Added a call to search_tidyup() just before forking a reception process. In
6728 theory, someone could use a lookup in the expansion of smtp_accept_max_
6729 per_host which, without the tidyup, could leave open a database connection.
6731 5. Added the variables $recipient_data and $sender_data which get set from a
6732 lookup success in an ACL "recipients" or "senders" condition, or a router
6733 "senders" option, similar to $domain_data and $local_part_data.
6735 6. Moved the writing of debug_print from before to after the "senders" test
6738 7. Change 4.31/66 (moving the time when the Received: is generated) caused
6739 problems for message scanning, either using a data ACL, or using
6740 local_scan() because the Received: header was not generated till after they
6741 were called (in order to set the time as the time of reception completion).
6742 I have revised the way this works. The header is now generated after the
6743 body is received, but before the ACL or local_scan() are called. After they
6744 are run, the timestamp in the header is updated.
6750 1. Change 4.24/6 introduced a bug because the SIGALRM handler was disabled
6751 before starting a queue runner without re-exec. This happened only when
6752 deliver_drop_privilege was set or when the Exim user was set to root. The
6753 effect of the bug was that timeouts during subsequent deliveries caused
6754 crashes instead of being properly handled. The handler is now left at its
6755 default (and expected) setting.
6757 2. The other case in which a daemon avoids a re-exec is to deliver an incoming
6758 message, again when deliver_drop_privilege is set or Exim is run as root.
6759 The bug described in (1) was not present in this case, but the tidying up
6760 of the other signals was missing. I have made the two cases consistent.
6762 3. The ignore_target_hosts setting on a manualroute router was being ignored
6763 for hosts that were looked up using the /MX notation.
6765 4. Added /ignore=<ip list> feature to @mx_any, @mx_primary, and @mx_secondary
6768 5. Change 4.31/55 was buggy, and broke when there was a rewriting rule that
6769 operated on the sender address. After changing the $sender_address to <>
6770 for the sender address verify, Exim was re-instated it as the original
6771 (before rewriting) address, but remembering that it had rewritten it, so it
6772 wasn't rewriting it again. This bug also had the effect of breaking the
6773 sender address verification caching when the sender address was rewritten.
6775 6. The ignore_target_hosts option was being ignored by the ipliteral router.
6776 This has been changed so that if the ip literal address matches
6777 ignore_target_hosts, the router declines.
6779 7. Added expansion conditions match_domain, match_address, and match_local_
6780 part (NOT match_host).
6782 8. The placeholder for the Received: header didn't have a length field set.
6784 9. Added code to Exim itself and to exim_lock to test for a specific race
6785 condition that could lead to file corruption when using MBX delivery. The
6786 issue is with the lockfile that is created in /tmp. If this file is removed
6787 after a process has opened it but before that process has acquired a lock,
6788 there is the potential for a second process to recreate the file and also
6789 acquire a lock. This could lead to two Exim processes writing to the file
6790 at the same time. The added code performs the same test as UW imapd; it
6791 checks after acquiring the lock that its file descriptor still refers to
6792 the same named file.
6794 10. The buffer for building added header lines was of fixed size, 8192 bytes.
6795 It is now parameterized by HEADER_ADD_BUFFER_SIZE and this can be adjusted
6798 11. Added the smtp_active_hostname option. If used, this will typically be made
6799 to depend on the incoming interface address. Because $interface_address is
6800 not set up until the daemon has forked a reception process, error responses
6801 that can happen earlier (such as "too many connections") no longer contain
6804 12. If an expansion in a condition on a "warn" statement fails because a lookup
6805 defers, the "warn" statement is abandoned, and the next ACL statement is
6806 processed. Previously this caused the whole ACL to be aborted.
6808 13. Added the iplsearch lookup type.
6810 14. Added ident_timeout as a log selector.
6812 15. Added tls_certificate_verified as a log selector.
6814 16. Added a global option tls_require_ciphers (compare the smtp transport
6815 option of the same name). This controls incoming TLS connections.
6817 17. I finally figured out how to make tls_require_ciphers do a similar thing
6818 in GNUtls to what it does in OpenSSL, that is, set up an appropriate list
6819 before starting the TLS session.
6821 18. Tabs are now shown as \t in -bP output.
6823 19. If the log selector return_path_on_delivery was set, Exim crashed when
6824 bouncing a message because it had too many Received: header lines.
6826 20. If two routers both had headers_remove settings, and the first one included
6827 a superfluous trailing colon, the final name in the first list and the
6828 first name in the second list were incorrectly joined into one item (with a
6829 colon in the middle).
6835 1. Added -C and -D options to the exinext utility, mainly to make it easier
6836 to include in the automated testing, but these could be helpful when
6837 multiple configurations are in use.
6839 2. The exinext utility was not formatting the output nicely when there was
6840 an alternate port involved in the retry record key, nor when there was a
6841 message id as well (for retries that were specific to a specific message
6842 and a specific host). It was also confused by IPv6 addresses, because of
6843 the additional colons they contain. I have fixed the IPv4 problem, and
6844 patched it up to do a reasonable job for IPv6.
6846 3. When there is an error after a MAIL, RCPT, or DATA SMTP command during
6847 delivery, the log line now contains "pipelined" if PIPELINING was used.
6849 4. An SMTP transport process used to panic and die if the bind() call to set
6850 an explicit outgoing interface failed. This has been changed; it is now
6851 treated in the same way as a connect() failure.
6853 5. A reference to $sender_host_name in the part of a conditional expansion
6854 that was being skipped was still causing a DNS lookup. This no longer
6857 6. The def: expansion condition was not recognizing references to header lines
6858 that used bh_ and bheader_.
6860 7. Added the _cache feature to named lists.
6862 8. The code for checking quota_filecount in the appendfile transport was
6863 allowing one more file than it should have been.
6865 9. For compatibility with Sendmail, the command line option
6873 and sets the incoming protocol and host name (for trusted callers). The
6874 host name and its colon can be omitted when only the protocol is to be set.
6875 Note the Exim already has two private options, -pd and -ps, that refer to
6876 embedded Perl. It is therefore impossible to set a protocol value of "d" or
6877 "s", but I don't think that's a major issue.
6879 10. A number of refactoring changes to the code, none of which should affect
6882 (a) The number of logging options was getting close to filling up the
6883 32-bit word that was used as a bit map. I have split them into two classes:
6884 those that are passed in the argument to log_write(), and those that are
6885 only ever tested independently outside of that function. These are now in
6886 separate 32-bit words, so there is plenty of room for expansion again.
6887 There is no change in the user interface or the logging behaviour.
6889 (b) When building, for example, log lines, the code previously used a
6890 macro that called string_cat() twice, in order to add two strings. This is
6891 not really sufficiently general. Furthermore, there was one instance where
6892 it was actually wrong because one of the argument was used twice, and in
6893 one call a function was used. (As it happened, calling the function twice
6894 did not affect the overall behaviour.) The macro has been replaced by a
6895 function that can join an arbitrary number of extra strings onto a growing
6898 (c) The code for expansion conditions now uses a table and a binary chop
6899 instead of a serial search (which was left over from when there were very
6900 few conditions). Also, it now recognizes conditions like "pam" even when
6901 the relevant support is not compiled in: a suitably worded error message is
6902 given if an attempt is made to use such a condition.
6904 11. Added ${time_interval:xxxxx}.
6906 12. A bug was causing one of the ddress fields not to be passed back correctly
6907 from remote delivery subprocesses. The field in question was not being
6908 subsequently used, so this caused to problems in practice.
6910 13. Added new log selectors queue_time and deliver_time.
6912 14. Might have fixed a bug in maildirsizefile handling that threw up
6913 "unexpected character" debug warnings, and recalculated the data
6914 unnecessarily. In any case, I expanded the warning message to give more
6917 15. Added the message "Restricted characters in address" to the statements in
6918 the default ACL that block characters like @ and % in local parts.
6920 16. Change 71 for release 4.31 proved to be much less benign that I imagined.
6921 Three changes have been made:
6923 (a) There was a serious bug; a negative response to MAIL caused the whole
6924 recipient domain to be cached as invalid, thereby blocking all messages
6925 to all local parts at the same domain, from all senders. This bug has
6926 been fixed. The domain is no longer cached after a negative response to
6927 MAIL if the sender used is not empty.
6929 (b) The default behaviour of using MAIL FROM:<> for recipient callouts has
6932 (c) A new callout option, "use_sender" has been added for people who want
6933 the modified behaviour.
6939 1. Removed "EXTRALIBS=-lwrap" from OS/Makefile-Unixware7 on the advice of
6942 2. Removed "LIBS = -lresolv" from OS/Makefile-Darwin as it is not needed, and
6943 indeed breaks things for older releases.
6945 3. Added additional logging to the case where there is a problem reading data
6946 from a filter that is running in a subprocess using a pipe, in order to
6947 try to track down a specific problem.
6949 4. Testing facility fudge: when running in the test harness and attempting
6950 to connect to 10.x.x.x (expecting a connection timeout) I'm now sometimes
6951 getting "No route to host". Convert this to a timeout.
6953 5. Define ICONV_ARG2_TYPE as "char **" for Unixware7 to avoid compiler
6956 6. Some OS don't have socklen_t but use size_t instead. This affects the
6957 fifth argument of getsockopt() amongst other things. This is now
6958 configurable by a macro called SOCKLEN_T which defaults to socklen_t, but
6959 can be set for individual OS. I have set it for SunOS5, OSF1, and
6960 Unixware7. Current versions of SunOS5 (aka Solaris) do have socklen_t, but
6961 some earlier ones do not.
6963 7. Change 4.30/15 was not doing the test caselessly.
6965 8. The standard form for an IPv6 address literal was being rejected by address
6966 parsing in, for example, MAIL and RCPT commands. An example of this kind of
6967 address is [IPv6:2002:c1ed:8229:10:202:2dff:fe07:a42a]. Exim now accepts
6968 this, as well as the form without the "IPv6" on the front (but only when
6969 address literals are enabled, of course).
6971 9. Added some casts to avoid compiler warnings in OS/os.c-Linux.
6973 10. Exim crashed if a message with an empty sender address specified by -f
6974 encountered a router with an errors_to setting. This could be provoked only
6975 by a command such as
6979 where an empty string was supplied; "<>" did not hit this bug.
6981 11. Installed PCRE release 4.5.
6983 12. If EHLO/HELO was rejected by an ACL, the value of $sender_helo_name
6984 remained set. It is now erased.
6986 13. exiqgrep wasn't working on MacOS X because it didn't correctly compute
6987 times from message ids (which are base 36 rather than the normal 62).
6989 14. "Expected" SMTP protocol errors that can arise when PIPELINING is in use
6990 were being counted as actual protocol errors, and logged if the log
6991 selector +smtp_protocol_error was set. One cannot be perfect in this test,
6992 but now, if PIPELINING has been advertised, RCPT following a rejected MAIL,
6993 and DATA following a set of rejected RCPTs do not count as protocol errors.
6994 In other words, Exim assumes they were pipelined, though this may not
6995 actually be the case. Of course, in all cases the client gets an
6996 appropriate error code.
6998 15. If a lookup fails in an ACL condition, a message about the failure may
6999 be available; it is used if testing the ACL cannot continue, because most
7000 such messages specify what the cause of the deferral is. However, some
7001 messages (e.g. "MYSQL: no data found") do not cause a defer. There was bug
7002 that caused an old message to be retained and used if a later statement
7003 caused a defer, replacing the real cause of the deferral.
7005 16. If an IP address had so many PTR records that the DNS lookup buffer
7006 was not large enough to hold them, Exim could crash while trying to process
7007 the truncated data. It now detects and logs this case.
7009 17. Further to 4.21/58, another change has been made: if (and only if) the
7010 first line of a message (the first header line) ends with CRLF, a bare LF
7011 in a subsequent header line has a space inserted after it, so as not to
7012 terminate the header.
7014 18. Refactoring: tidied an ugly bit of code in appendfile that copied data
7015 unnecessarily, used atoi() instead of strtol(), and didn't check the
7016 termination when getting file sizes from file names by regex.
7018 19. Completely re-implemented the support for maildirsize files, in the light
7019 of a number of problems with the previous contributed implementation
7020 (4.30/29). In particular:
7022 . If the quota is zero, the maildirsize file is maintained, but no quota is
7025 . If the maildir directory does not exist, it is created before any attempt
7026 to write a maildirsize file.
7028 . The quota value in the file is just a cache; if the quota is changed in
7029 the transport, the new value overrides.
7031 . A regular expression is available for excluding directories from the
7034 20. The autoreply transport checks the characters in options that define the
7035 message's headers; it allows continued headers, but it was checking with
7036 isspace() after an embedded newline instead of explicitly looking for a
7039 21. If all the "regular" hosts to which an address was routed had passed their
7040 expiry times, and had not reached their retry times, the address was
7041 bounced, even if fallback hosts were defined. Now Exim should go on to try
7044 22. Increased buffer sizes in the callout code from 1024 to 4096 to match the
7045 equivalent code in the SMTP transport. Some hosts send humungous responses
7046 to HELO/EHLO, more than 1024 it seems.
7048 23. Refactoring: code in filter.c used (void *) for "any old type" but this
7049 gives compiler warnings in some environments. I've now done it "properly",
7052 24. The replacement for inet_ntoa() that is used with gcc on IRIX systems
7053 (because of problems with the built-in one) was declared to return uschar *
7054 instead of char *, causing compiler failure.
7056 25. Fixed a file descriptor leak when processing alias/forward files.
7058 26. Fixed a minor format string issue in dbfn.c.
7060 27. Typo in exim.c: ("dmbnz" for "dbmnz").
7062 28. If a filter file refered to $h_xxx or $message_headers, and the headers
7063 contained RFC 2047 "words", Exim's memory could, under certain conditions,
7066 29. When a sender address is verified, it is cached, to save repeating the test
7067 when there is more than one recipient in a message. However, when the
7068 verification involves a callout, it is possible for different callout
7069 options to be set for different recipients. It is too complicated to keep
7070 track of this in the cache, so now Exim always runs a verification when a
7071 callout is required, relying on the callout cache for the optimization.
7072 The overhead is duplication of the address routing, but this should not be
7075 30. Fixed a bug in callout caching. If a RCPT command caused the sender address
7076 to be verified with callout=postmaster, and the main callout worked but the
7077 postmaster check failed, the verification correctly failed. However, if a
7078 subsequent RCPT command asked for sender verification *without* the
7079 postmaster check, incorrect caching caused this verification also to fail,
7082 31. Exim caches DNS lookup failures so as to avoid multiple timeouts; however,
7083 it was not caching the DNS options (qualify_single, search_parents) that
7084 were used when the lookup failed. A subsequent lookup with different
7085 options therefore always gave the same answer, though there were cases
7086 where it should not have. (Example: a "domains = !$mx_any" option on a
7087 dnslookup router: the "domains" option is always processed without any
7088 widening, but the router might have qualify_single set.) Now Exim uses the
7089 cached value only when the same options are set.
7091 32. Added John Jetmore's "exipick" utility to the distribution.
7093 33. GnuTLS: When an attempt to start a TLS session fails for any reason other
7094 than a timeout (e.g. a certificate is required, and is not provided), an
7095 Exim server now closes the connection immediately. Previously it waited for
7096 the client to close - but if the client is SSL, it seems that they each
7097 wait for each other, leading to a delay before one of them times out.
7099 34: GnuTLS: Updated the code to use the new GnuTLS 1.0.0 API. I have not
7100 maintained 0.8.x compatibility because I don't think many are using it, and
7101 it is clearly obsolete.
7103 35. Added TLS support for CRLs: a tls_crl global option and one for the smtp
7106 36. OpenSSL: $tls_certificate_verified was being set to 1 even if the
7107 client certificate was expired. A simple patch fixes this, though I don't
7108 understand the full logic of why the verify callback is called multiple
7111 37. OpenSSL: a patch from Robert Roselius: "Enable client-bug workaround.
7112 Versions of OpenSSL as of 0.9.6d include a 'CBC countermeasure' feature,
7113 which causes problems with some clients (such as the Certicom SSL Plus
7114 library used by Eudora). This option, SSL_OP_DONT_INSERT_EMPTY_FRAGMENTS,
7115 disables the coutermeasure allowing Eudora to connect."
7117 38. Exim was not checking that a write() to a log file succeeded. This could
7118 lead to Bad Things if a log got too big, in particular if it hit a file
7119 size limit. Exim now panics and dies if it cannot write to a log file, just
7120 as it does if it cannot open a log file.
7122 39. Modified OS/Makefile-Linux so that it now contains
7124 CFLAGS=-O -D_FILE_OFFSET_BITS=64 -D_LARGEFILE_SOURCE
7126 The two -D definitions ensure that Exim is compiled with large file
7127 support, which makes it possible to handle log files that are bigger than
7130 40. Fixed a subtle caching bug: if (in an ACL or a set of routers, for
7131 instance) a domain was checked against a named list that involved a lookup,
7132 causing $domain_data to be set, then another domain was checked against the
7133 same list, then the first domain was re-checked, the value of $domain_data
7134 after the final check could be wrong. In particular, if the second check
7135 failed, it could be set empty. This bug probably also applied to
7138 41. The strip_trailing_dot option was not being applied to the address given
7139 with the -f command-line option.
7141 42. The code for reading a message's header from the spool was incrementing
7142 $received_count, but never initializing it. This meant that the value was
7143 incorrect (doubled) while delivering a message in the same process in which
7144 it was received. In the most common configuration of Exim, this never
7145 happens - a fresh exec is done - but it can happen when
7146 deliver_drop_privilege is set.
7148 43. When Exim logs an SMTP synchronization error - client data sent too soon -
7149 it now includes up to 150 characters of the unexpected data in the log
7152 44. The exim_dbmbuild utility uses fixed size buffers for reading input lines
7153 and building data strings. The size of both of these buffers was 10 000
7154 bytes - far larger than anybody would *ever* want, thought I. Needless to
7155 say, somebody hit the limit. I have increased the maximum line length to
7156 20 000 and the maximum data length of concatenated lines to 100 000. I have
7157 also fixed two bugs, because there was no checking on these buffers. Tsk,
7158 tsk. Now exim_dbmbuild gives a message and exits with an error code if a
7159 buffer is too small.
7161 45. The exim_dbmbuild utility did not support quoted keys, as Exim does in
7162 lsearch lookups. Now it does.
7164 46. When parsing a route_list item in a manualroute router, a fixed-length
7165 buffer was used for the list of hosts. I made this 1024 bytes long,
7166 thinking that nobody would ever have a list of hosts that long. Wrong.
7167 Somebody had a whole pile of complicated expansion conditions, and the
7168 string was silently truncated, leading to an expansion error. It turns out
7169 that it is easier to change to an unlimited length (owing to other changes
7170 that have happened since this code was originally written) than to build
7171 structure for giving a limitation error. The length of the item that
7172 expands into the list of hosts is now unlimited.
7174 47. The lsearch lookup could not handle data where the length of text line was
7175 more than 4095 characters. Such lines were truncated, leading to shortened
7176 data being returned. It should now handle lines of any length.
7178 48. Minor wording revision: "cannot test xxx in yyy ACL" becomes "cannot test
7179 xxx condition in yyy ACL" (e.g. "cannot test domains condition in DATA
7182 49. Cosmetic tidy to scripts like exicyclog that are generated by globally
7183 replacing strings such as BIN_DIRECTORY in a source file: the replacement
7184 no longer happens in comment lines. A list of replacements is now placed
7185 at the head of all of the source files, except those whose only change is
7186 to replace PERL_COMMAND in the very first #! line.
7188 50. Replaced the slow insertion sort in queue.c, for sorting the list of
7189 messages on the queue, with a bottom-up merge sort, using code contributed
7190 by Michael Haardt. This should make operations like -bp somewhat faster on
7191 large queues. It won't affect queue runners, except when queue_run_in_order
7194 51. Installed eximstats 1.31 in the distribution.
7196 52. Added support for SRV lookups to the dnslookup router.
7198 53. If an ACL referred to $message_body or $message_body_end, the value was not
7199 reset for any messages that followed in the same SMTP session.
7201 54. The store-handling optimization for building very long strings was not
7202 differentiating between the different store pools. I don't think this
7203 actually made any difference in practice, but I've tidied it.
7205 55. While running the routers to verify a sender address, $sender_address
7206 was still set to the sender address. This is wrong, because when routing to
7207 send a bounce to the sender, it would be empty. Therefore, I have changed
7208 it so that, while verifying a sender address, $sender_address is set to <>.
7209 (There is no change to what happens when verifying a recipient address.)
7211 56. After finding MX (or SRV) records, Exim was doing a DNS lookup for the
7212 target A or AAAA records (if not already returned) without resetting the
7213 qualify_single or search_parents options of the DNS resolver. These are
7214 inappropriate in this case because the targets of MX and SRV records must
7215 be FQDNs. A broken DNS record could cause trouble if it happened to have a
7216 target that, when qualified, matched something in the local domain. These
7217 two options are now turned off when doing these lookups.
7219 57. It seems that at least some releases of Reiserfs (which does not have the
7220 concept of a fixed number of inodes) returns zero and not -1 for the
7221 number of available inodes. This interacted badly with check_spool_inodes,
7222 which assumed that -1 was the "no such thing" setting. What I have done is
7223 to check that the total number of inodes is greater than zero before doing
7224 the test of how many are available.
7226 58. When a "warn" ACL statement has a log_message modifier, the message is
7227 remembered, and not repeated. This is to avoid a lot of repetition when a
7228 message has many recipients that cause the same warning to be written.
7229 However, Exim was preserving the list of already written lines for an
7230 entire SMTP session, which doesn't seem right. The memory is now reset if a
7231 new message is started.
7233 59. The "rewrite" debugging flag was not showing the result of rewriting in the
7234 debugging output unless log_rewrite was also set.
7236 60. Avoid a compiler warning on 64-bit systems in dsearch.c by avoiding the use
7237 of (int)(handle) when we know that handle contains (void *)(-1).
7239 61. The Exim daemon panic-logs an error return when it closes the incoming
7240 connection. However "connection reset by peer" seems to be common, and
7241 isn't really an error worthy of noting specially, so that particular error
7244 62. When Exim is trying to find all the local interfaces, it used to panic and
7245 die if the ioctl to get the interface flags failed. However, it seems that
7246 on at least one OS (Solaris 9) it is possible to have an interface that is
7247 included in the list of interfaces, but for which you get a failure error
7248 for this call. This happens when the interface is not "plumbed" into a
7249 protocol (i.e. neither IPv4 nor IPv6). I've changed the code so that a
7250 failure of the "get flags" call assumes that the interface is down.
7252 63. Added a ${eval10: operator, which assumes all numbers are decimal. This
7253 makes life easier for people who are doing arithmetic on fields extracted
7254 from dates, where you often get leading zeros that should not be
7255 interpreted as octal.
7257 64. Added qualify_domain to the redirect router, to override the global
7260 65. If a pathologically long header line contained very many addresses (the
7261 report of this problem mentioned 10 000) and each of them was rewritten,
7262 Exim could use up a very large amount of memory. (It kept on making new
7263 copies of the header line as it rewrote, and never released the old ones.)
7264 At the expense of a bit more processing, the header rewriting function has
7265 been changed so that it no longer eats memory in this way.
7267 66. The generation of the Received: header has been moved from the time that a
7268 message starts to be received, to the time that it finishes. The timestamp
7269 in the Received: header should now be very close to that of the <= log
7270 line. There are two side-effects of this change:
7272 (a) If a message is rejected by a DATA or non-SMTP ACL or local_scan(), the
7273 logged header lines no longer include the local Received: line, because
7274 it has not yet been created. The same applies to a copy of the message
7275 that is returned to a non-SMTP sender when a message is rejected.
7277 (b) When a filter file is tested using -bf, no additional Received: header
7278 is added to the test message. After some thought, I decided that this
7281 This change does not affect the value of $received_for. It is still set
7282 after address rewriting, but before local_scan() is called.
7284 67. Installed the latest Cygwin-specific files from the Cygwin maintainer.
7286 68. GnuTLS: If an empty file is specified for tls_verify_certificates, GnuTLS
7287 gave an unhelpful panic error message, and a defer error. I have managed to
7288 change this behaviour so that it now rejects any supplied certificate,
7289 which seems right, as the list of acceptable certificates is empty.
7291 69. OpenSSL: If an empty file is specified for tls_verify_certificates, OpenSSL
7292 gave an unhelpful defer error. I have not managed to make this reject any
7293 supplied certificates, but the error message it gives is "no certificate
7294 supplied", which is not helpful.
7296 70. exigrep's output now also includes lines that are not associated with any
7297 message, but which match the given pattern. Implemented by a patch from
7298 Martin Sluka, which also tidied up the Perl a bit.
7300 71. Recipient callout verification, like sender verification, was using <> in
7301 the MAIL FROM command. This isn't really the right thing, since the actual
7302 sender may affect whether the remote host accepts the recipient or not. I
7303 have changed it to use the actual sender in the callout; this means that
7304 the cache record is now keyed on a recipient/sender pair, not just the
7305 recipient address. There doesn't seem to be a real danger of callout loops,
7306 since a callout by the remote host to check the sender would use <>.
7307 [SEE ABOVE: changed after hitting problems.]
7309 72. Exim treats illegal SMTP error codes that do not begin with 4 or 5 as
7310 temporary errors. However, in the case of such a code being given after
7311 the end of a data transmission (i.e. after ".") Exim was failing to write
7312 a retry record for the message. (Yes, there was some broken host that was
7313 actually sending 8xx at this point.)
7315 73. An unknown lookup type in a host list could cause Exim to panic-die when
7316 the list was checked. (An example that provoked this was putting <; in the
7317 middle of a list instead of at the start.) If this happened during a DATA
7318 ACL check, a -D file could be left lying around. This kind of configuration
7319 error no longer causes Exim to die; instead it causes a defer error. The
7320 incident is still logged to the main and panic logs.
7322 74. Buglet left over from Exim 3 conversion. The message "too many messages
7323 in one connection" was written to the rejectlog but not the mainlog, except
7324 when address rewriting (yes!) was being logged.
7326 75. Added write_rejectlog option.
7328 76. When a system filter was run not as root (that is, when system_filter_user
7329 was set), the values of the $n variables were not being returned to the
7330 main process; thus, they were not subsequently available in the $sn
7333 77. Added +return_path_on_delivery log selector.
7335 78. A connection timeout was being treated differently from recipients deferred
7336 when testing hosts_max_try with a message that was older than the host's
7337 retry timeout. (The host should not be counted, thus allowing all hosts to
7338 be tried at least once before bouncing.) This may have been the cause of an
7339 occasionally reported bug whereby a message would remain on the queue
7340 longer than the retry timeout, but would be bounced if a delivery was
7341 forced. I say "may" because I never totally pinned down the problem;
7342 setting up timeout/retry tests is difficult. See also the next item.
7344 79. The ultimate address timeout was not being applied to errors that involved
7345 a combination of host plus message (for example, a timeout on a MAIL
7346 command). When an address resolved to a number of possible hosts, and they
7347 were not all tried for each delivery (e.g. because of hosts_max_try), a
7348 message could remain on the queue longer than the retry timeout.
7350 80. Sieve bug: "stop" inside "elsif" was broken. Applied a patch from Michael
7353 81. Fixed an obscure SMTP outgoing bug which required at least the following
7354 conditions: (a) there was another message waiting for the same server;
7355 (b) the server returned 5xx to all RCPT commands in the first message so
7356 that the message was not completed; (c) the server dropped the connection
7357 or gave a negative response to the RSET that Exim sends to abort the
7358 transaction. The observed case was a dropped connection after DATA that had
7359 been sent in pipelining mode. That is, the server had advertised PIPELINING
7360 but was not implementing it correctly. The effect of the bug was incorrect
7361 behaviour, such as trying another host, and this could lead to a crash.
7367 1. The 3rd arguments to getsockname(), getpeername(), and accept() in exim.c
7368 and daemon.c were passed as pointers to ints; they should have been
7369 pointers to socklen_t variables (which are typically unsigned ints).
7371 2. Some signed/unsigned type warnings in the os.c file for Linux have been
7374 3. Fixed a really odd bug that affected only the testing scheme; patching a
7375 certain fixed string in the binary changed the value of another string that
7376 happened to be identical to the end of the original first string.
7378 4. When gethostbyname() (or equivalent) is passed an IP address as a "host
7379 name", it returns that address as the IP address. On some operating
7380 systems (e.g. Solaris), it also passes back the IP address string as the
7381 "host name". However, on others (e.g. Linux), it passes back an empty
7382 string. Exim wasn't checking for this, and was changing the host name to an
7383 empty string, assuming it had been canonicalized.
7385 5. Although rare, it is permitted to have more than one PTR record for a given
7386 IP address. I thought that gethostbyaddr() or getipnodebyaddr() always gave
7387 all the names associated with an address, because they do in Solaris.
7388 However, it seems that they do not in Linux for data that comes from the
7389 DNS. If an address in /etc/hosts has multiple names, they _are_ all given.
7390 I found this out when I moved to a new Linux workstation and tried to run
7391 the Exim test suite.
7393 To get round this problem I have changed the code so that it now does its
7394 own call to the DNS to look up PTR records when searching for a host name.
7395 If nothing can be found in the DNS, it tries gethostbyaddr(), so that
7396 addresses that are only in /etc/hosts are still found.
7398 This behaviour is, however, controlled by an option called host_lookup_
7399 order, which defaults to "bydns:byaddr". If people want to use the other
7400 order, or indeed, just use one or the other means of lookup, they can
7401 specify it in this variable.
7403 6. If a PTR record yields an empty name, Exim treats it as non-existent. In
7404 some operating systems, this comes back from gethostbyaddr() as an empty
7405 string, and this is what Exim used to test for. However, it seems that in
7406 other systems, "." is yielded. Exim now tests for this case too.
7408 7. The values of check_spool_space and check_log_space are now held internally
7409 as a number of kilobytes instead of an absolute number of bytes. If a
7410 numbers is specified without 'K' or 'M', it is rounded up to the nearest
7411 kilobyte. This means that much larger values can be stored.
7413 8. Exim monitor: an attempt to get the action menu when not actually pointing
7414 at a message produces an empty menu entitled "No message selected". This
7415 works on Solaris (OpenWindows). However, XFree86 does not like a menu with
7416 no entries in it ("Shell widget menu has zero width and/or height"). So I
7417 have added a single, blank menu entry in this case.
7419 9. Added ${quote_local_part.
7421 10. MIME decoding is now applied to the contents of Subject: header lines when
7424 11. Now that a reference to $sender_host_address automatically causes a reverse
7425 lookup to occur if necessary (4.13/18), there is no need to arrange for a
7426 host lookup before query-style lookups in lists that might use this
7427 variable. This has therefore been abolished, and the "net-" prefix is no
7428 longer necessary for query-style lookups.
7430 12. The Makefile for SCO_SV contained a setting of LDFLAGS. This appears to
7431 have been a typo for LFLAGS, so it has been changed.
7433 13. The install script calls Exim with "-C /dev/null" in order to find the
7434 version number. If ALT_CONFIG_PREFIX was set, this caused an error message
7435 to be output. However, since Exim outputs its version number before the
7436 error, it didn't break the script. It just looked ugly. I fixed this by
7437 always allowing "-C /dev/null" if the caller is root.
7439 14. Ignore overlarge ACL variable number when reading spool file - insurance
7440 against a later release with more variables having written the file.
7442 15. The standard form for an IPv6 address literal was being rejected by EHLO.
7443 Example: [IPv6:2002:c1ed:8229:10:202:2dff:fe07:a42a]. Exim now accepts
7444 this, as well as the form without the "IPv6" on the front.
7446 16. Added CHOWN_COMMAND=/usr/sbin/chown and LIBS=-lresolv to the
7447 OS/Makefile-Darwin file.
7449 17. Fixed typo in lookups/ldap.c: D_LOOKUP should be D_lookup. This applied
7450 only to LDAP libraries that do not have LDAP_OPT_DEREF.
7452 18. After change 4.21/52, "%ld" was used to format the contents of the $inode
7453 variable. However, some OS use ints for inodes. I've added cast to long int
7454 to get rid of the compiler warning.
7456 19. I had forgotten to lock out "/../" in configuration file names when
7457 ALT_CONFIG_PREFIX was set.
7459 20. Routers used for verification do not need to specify transports. However,
7460 if such a router generated a host list, and callout was configured, Exim
7461 crashed, because it could not find a port number from the (non-existent)
7462 transport. It now assumes port 25 in this circumstance.
7464 21. Added the -t option to exigrep.
7466 22. If LOOKUP_LSEARCH is defined, all three linear search methods (lsearch,
7467 wildlsearch, nwildlsearch) are compiled. LOOKUP_WILDLSEARCH and LOOKUP_
7468 NWILDLSEARCH are now obsolete, but retained for compatibility. If either of
7469 them is set, LOOKUP_LSEARCH is forced.
7471 23. "exim -bV" now outputs a list of lookups that are included in the binary.
7473 24. Added sender and host information to the "rejected by local_scan()" log
7474 line; previously there was no indication of these.
7476 25. Added .include_if_exists.
7478 26. Change 3.952/11 added an explicit directory sync on top of a file sync for
7479 Linux. It turns out that not all file systems support this. Apparently some
7480 versions of NFS do not. (It's rare to put Exim's spool on NFS, but people
7481 do it.) To cope with this, the error EINVAL, which means that sync-ing is
7482 not supported on the file descriptor, is now ignored when Exim is trying to
7483 sync a directory. This applies only to Linux.
7485 27. Added -DBIND_8_COMPAT to the CLFAGS setting for Darwin.
7487 28. In Darwin (MacOS X), the PAM headers are in /usr/include/pam and not in
7488 /usr/include/security. There's now a flag in OS/os.h-Darwin to cope with
7491 29. Added support for maildirsize files from supplied patch (modified a bit).
7493 30. The use of :fail: followed by an empty string could lead Exim to respond to
7494 sender verification failures with (e.g.):
7496 550 Verification failed for <xxx>
7497 550 Sender verify failed
7499 where the first response line was missing the '-' that indicates it is not
7500 the final line of the response.
7502 31. The loop for finding the name of the user that called Exim had a hardwired
7503 limit of 10; it now uses the value of finduser_retries, which is used for
7504 all other user lookups.
7506 32. Added $received_count variable, available in data and not_smtp ACLs, and at
7509 33. Exim was neglecting to zero errno before one call of strtol() when
7510 expanding a string and expecting an integer value. On some systems this
7511 resulted in spurious "integer overflow" errors. Also, it was casting the
7512 result into an int without checking.
7514 34. Testing for a connection timeout using "timeout_connect" in the retry rules
7515 did not work. The code looks as if it has *never* worked, though it appears
7516 to have been documented since at least release 1.62. I have made it work.
7518 35. The "timeout_DNS" error in retry rules, also documented since at least
7519 1.62, also never worked. As it isn't clear exactly what this means, and
7520 clearly it isn't a major issue, I have abolished the feature by treating it
7521 as "timeout", and writing a warning to the main and panic logs.
7523 36. The display of retry rules for -brt wasn't always showing the error code
7526 37. Added new error conditions to retry rules: timeout_A, timeout_MX,
7527 timeout_connect_A, timeout_connect_MX.
7529 38. Rewriting the envelope sender at SMTP time did not allow it to be rewritten
7530 to the empty sender.
7532 39. The daemon was not analysing the content of -oX till after it had closed
7533 stderr and disconnected from the controlling terminal. This meant that any
7534 syntax errors were only noted on the panic log, and the return code from
7535 the command was 0. By re-arranging the code a little, I've made the
7536 decoding happen first, so such errors now appear on stderr, and the return
7537 code is 1. However, the actual setting up of the sockets still happens in
7538 the disconnected process, so errors there are still only recorded on the
7541 40. A daemon listener on a wildcard IPv6 socket that also accepts IPv4
7542 connections (as happens on some IP stacks) was logged at start up time as
7543 just listening for IPv6. It now logs "IPv6 with IPv4". This differentiates
7544 it from "IPv6 and IPv4", which means that two separate sockets are being
7547 41. The debug output for gethostbyname2() or getipnodebyname() failures now
7548 says whether AF_INET or AF_INET6 was passed as an argument.
7550 42. Exiwhat output was messed up when time zones were included in log
7553 43. Exiwhat now gives more information about the daemon's listening ports,
7554 and whether -tls-on-connect was used.
7556 44. The "port" option of the smtp transport is now expanded.
7558 45. A "message" modifier in a "warn" statement in a non-message ACL was being
7559 silently ignored. Now an error message is written to the main and panic
7562 46. There's a new ACL modifier called "logwrite" which writes to a log file
7563 as soon as it is encountered.
7565 47. Added $local_user_uid and $local_user_gid at routing time.
7567 48. Exim crashed when trying to verify a sender address that was being
7570 49. Exim was recognizing only a space character after ".include". It now also
7571 recognizes a tab character.
7573 50. Fixed several bugs in the Perl script that creates the exim.8 man page by
7574 extracting the relevant information from the specification. The man page no
7575 longer contains scrambled data for the -d option, and I've added a section
7576 at the front about calling Exim under different names.
7578 51. Added "extra_headers" argument to the "mail" command in filter files.
7580 52. Redirecting mail to an unqualified address in a Sieve filter caused Exim to
7583 53. Installed eximstats 1.29.
7585 54. Added transport_filter_timeout as a generic transport option.
7587 55. Exim no longer adds an empty Bcc: header to messages that have no To: or
7588 Cc: header lines. This was required by RFC 822, but it not required by RFC
7591 56. Exim used to add From:, Date:, and Message-Id: header lines to any
7592 incoming messages that did not have them. Now it does so only if the
7593 message originates locally, that is, if there is no associated remote host
7594 address. When Resent- header lines are present, this applies to the Resent-
7595 lines rather than the non-Resent- lines.
7597 57. Drop incoming SMTP connection after too many syntax or protocol errors. The
7598 limit is controlled by smtp_max_synprot_errors, defaulting to 3.
7600 58. Messages for configuration errors now include the name of the main
7601 configuration file - useful now that there may be more than one file in a
7602 list (.included file names were always shown).
7604 59. Change 4.21/82 (run initgroups() when starting the daemon) causes problems
7605 for those rare installations that do not start the daemon as root or run it
7606 setuid root. I've cut out the call to initgroups() if the daemon is not
7609 60. The Exim user and group can now be bound into the binary as text strings
7610 that are looked up at the start of Exim's processing.
7612 61. Applied a small patch for the Interbase code, supplied by Ard Biesheuvel.
7614 62. Added $mailstore_basename variable.
7616 63. Installed patch to sieve.c from Michael Haardt.
7618 64. When Exim failed to open the panic log after failing to open the main log,
7619 the original message it was trying to log was written to stderr and debug
7620 output, but if they were not available (the usual case in production), it
7621 was lost. Now it is written to syslog before the two lines that record the
7622 failures to open the logs.
7624 65. Users' Exim filters run in subprocesses under the user's uid. It is
7625 possible for a "deliver" command or an alias in a "personal" command to
7626 provoke an address rewrite. If logging of address rewriting is configured,
7627 this fails because the process is not running as root or exim. There may be
7628 a better way of dealing with this, but for the moment (because 4.30 needs
7629 to be released), I have disabled address rewrite logging when running a
7630 filter in a non-root, non-exim process.
7636 1. The buildconfig auxiliary program wasn't quoting the value set for
7637 HEADERS_CHARSET. This caused a compilation error complaining that 'ISO' was
7638 not defined. This bug was masked in 4.22 by the effect that was fixed in
7641 2. Some messages that were rejected after a message id was allocated were
7642 shown as "incomplete" by exigrep. It no longer does this for messages that
7643 are rejected by local_scan() or the DATA or non-SMTP ACLs.
7645 3. If a Message-ID: header used a domain literal in the ID, and Exim did not
7646 have allow_domain_literals set, the ID did not get logged in the <= line.
7647 Domain literals are now always recognized in Message-ID: header lines.
7649 4. The first argument for a ${extract expansion item is the key name or field
7650 number. Leading and trailing spaces in this item were not being ignored,
7651 causing some misleading effects.
7653 5. When deliver_drop_privilege was set, single queue runner processes started
7654 manually (i.e. by the command "exim -q") or by the daemon (which uses the
7655 same command in the process it spins off) were not dropping privilege.
7657 6. When the daemon running as "exim" started a queue runner, it always
7658 re-executed Exim in the spun-off process. This is a waste of effort when
7659 deliver_drop_privilege is set. The new process now just calls the
7660 queue-runner function directly.
7666 1. Typo in the src/EDITME file: it referred to HEADERS_DECODE_TO instead of
7669 2. Change 4.21/73 introduced a bug. The pid file path set by -oP was being
7670 ignored. Though the use of -oP was forcing the writing of a pid file, it
7671 was always written to the default place.
7673 3. If the message "no IP address found for host xxxx" is generated during
7674 incoming verification, it is now followed by identification of the incoming
7675 connection (so you can more easily find what provoked it).
7677 4. Bug fix for Sieve filters: "stop" inside a block was not working properly.
7679 5. Added some features to "harden" Exim a bit more against certain attacks:
7681 (a) There is now a build-time option called FIXED_NEVER_USERS that can
7682 be put in Local/Makefile. This is like the never_users runtime option,
7683 but it cannot be overridden. The default setting is "root".
7685 (b) If ALT_CONFIG_PREFIX is defined in Local/Makefile, it specifies a
7686 prefix string with which any file named in a -C command line option
7689 (c) If ALT_CONFIG_ROOT_ONLY is defined in Local/Makefile, root privilege
7690 is retained for -C and -D only if the caller of Exim is root. Without
7691 it, the exim user may also use -C and -D and retain privilege.
7693 (d) If DISABLE_D_OPTION is defined in Local/Makefile, the use of the -D
7694 command line option is disabled.
7696 6. Macro names set by the -D option must start with an upper case letter, just
7697 like macro names defined in the configuration file.
7699 7. Added "dereference=" facility to LDAP.
7701 8. Two instances of the typo "uknown" in the source files are fixed.
7703 9. If a PERL_COMMAND setting in Local/Makefile was not at the start of a line,
7704 the Configure-Makefile script screwed up while processing it.
7706 10. Incorporated PCRE 4.4.
7708 11. The SMTP synchronization check was not operating right at the start of an
7709 SMTP session. For example, it could not catch a HELO sent before the client
7710 waited for the greeting. There is now a check for outstanding input at the
7711 point when the greeting is written. Because of the duplex, asynchronous
7712 nature of TCP/IP, it cannot be perfect - the incorrect input may be on its
7713 way, but not yet received, when the check is performed.
7715 12. Added tcp_nodelay to make it possible to turn of the setting of TCP_NODELAY
7716 on TCP/IP sockets, because this apparently causes some broken clients to
7719 13. Installed revised OS/Makefile-CYGWIN and OS/os.c-cygwin (the .h file was
7720 unchanged) from the Cygwin maintainer.
7722 14. The code for -bV that shows what is in the binary showed "mbx" when maildir
7723 was supported instead of testing for mbx. Effectively a typo.
7725 15. The spa authenticator server code was not checking that the input it
7726 received was valid base64.
7728 16. The debug output line for the "set" modifier in ACLs was not showing the
7729 name of the variable that was being set.
7731 17. Code tidy: the variable type "vtype_string" was never used. Removed it.
7733 18. Previously, a reference to $sender_host_name did not cause a DNS reverse
7734 lookup on its own. Something else was needed to trigger the lookup. For
7735 example, a match in host_lookup or the need for a host name in a host list.
7736 Now, if $sender_host_name is referenced and the host name has not yet been
7737 looked up, a lookup is performed. If the lookup fails, the variable remains
7738 empty, and $host_lookup_failed is set to "1".
7740 19. Added "eqi" as a case-independent comparison operator.
7742 20. The saslauthd authentication condition could segfault if neither service
7743 nor realm was specified.
7745 21. If an overflowing value such as "2048M" was set for message_size_limit, the
7746 error message that was logged was misleading, and incoming SMTP
7747 connections were dropped. The message is now more accurate, and temporary
7748 errors are given to SMTP connections.
7750 22. In some error situations (such as 21 above) Exim rejects all SMTP commands
7751 (except RSET) with a 421 error, until QUIT is received. However, it was
7752 failing to send a response to QUIT.
7754 23. The HELO ACL was being run before the code for helo_try_verify_hosts,
7755 which made it impossible to use "verify = helo" in the HELO ACL. The HELO
7756 ACL is now run after the helo_try_verify_hosts code.
7758 24. "{MD5}" and "{SHA1}" are now recognized as equivalent to "{md5"} and
7759 "{sha1}" in the "crypteq" expansion condition (in fact the comparison is
7760 case-independent, so other case variants are also recognized). Apparently
7761 some systems use these upper case variants.
7763 25. If more than two messages were waiting for the same host, and a transport
7764 filter was specified for the transport, Exim sent two messages over the
7765 same TCP/IP connection, and then failed with "socket operation on non-
7766 socket" when it tried to send the third.
7768 26. Added Exim::debug_write and Exim::log_write for embedded Perl use.
7770 27. The extern definition of crypt16() in expand.c was not being excluded when
7771 the OS had its own crypt16() function.
7773 28. Added bounce_return_body as a new option, and bounce_return_size_limit
7774 as a preferred synonym for return_size_limit, both as an option and as an
7777 29. Added LIBS=-liconv to OS/Makefile-OSF1.
7779 30. Changed the default configuration ACL to relax the local part checking rule
7780 for addresses that are not in any local domains. For these addresses,
7781 slashes and pipe symbols are allowed within local parts, but the sequence
7782 /../ is explicitly forbidden.
7784 31. SPA server authentication was not clearing the challenge buffer before
7787 32. log_message in a "warn" ACL statement was writing to the reject log as
7788 well as to the main log, which contradicts the documentation and doesn't
7789 seem right (because no rejection is happening). So I have stopped it.
7791 33. Added Ard Biesheuvel's lookup code for accessing an Interbase database.
7792 However, I am unable to do any testing of this.
7794 34. Fixed an infelicity in the appendfile transport. When checking directories
7795 for a mailbox, to see if any needed to be created, it was accidentally
7796 using path names with one or more superfluous leading slashes; tracing
7797 would show up entries such as stat("///home/ph10", 0xFFBEEA48).
7799 35. If log_message is set on a "discard" verb in a MAIL or RCPT ACL, its
7800 contents are added to the log line that is written for every discarded
7801 recipient. (Previously a log_message setting was ignored.)
7803 36. The ${quote: operator now quotes the string if it is empty.
7805 37. The install script runs exim in order to find its version number. If for
7806 some reason other than non-existence or emptiness, which it checks, it
7807 could not run './exim', it was installing it with an empty version number,
7808 i.e. as "exim-". This error state is now caught, and the installation is
7811 38. An argument was missing from the function that creates an error message
7812 when Exim fails to connect to the socket for saslauthd authentication.
7813 This could cause Exim to crash, or give a corrupted message.
7815 39. Added isip, isip4, and isip6 to ${if conditions.
7817 40. The ACL variables $acl_xx are now saved with the message, and can be
7818 accessed later in routers, transports, and filters.
7820 41. The new lookup type nwildlsearch is like wildlsearch, except that the key
7821 strings in the file are not string-expanded.
7823 42. If a MAIL command specified a SIZE value that was too large to fit into an
7824 int variable, the check against message_size_limit failed. Such values are
7825 now forced to INT_MAX, which is around 2Gb for a 32-bit variable. Maybe one
7826 day this will have to be increased, but I don't think I want to be around
7827 when emails are that large.
7834 1. Removed HAVE_ICONV=yes from OS/Makefile-FreeBSD, since it seems that
7835 iconv() is not standard in FreeBSD.
7837 2. Change 4.21/17 was buggy and could cause stack overwriting on a system with
7838 IPv6 enabled. The observed symptom was a segmentation fault on return from
7839 the function os_common_find_running_interfaces() in src/os.c.
7841 3. In the check_special_case() function in daemon.c I had used "errno" as an
7842 argument name, which causes warnings on some systems. This was basically a
7843 typo, since it was named "eno" in the comments!
7845 4. The code that waits for the clock to tick (at a resolution of some fraction
7846 of a second) so as to ensure message-id uniqueness was always waiting for
7847 at least one whole tick, when it could have waited for less. [This is
7848 almost certainly not relevant at current processor speeds, where it is
7849 unlikely to ever wait at all. But we try to future-proof.]
7851 5. The function that sleeps for a time interval that includes fractions of a
7852 second contained a race. It did not block SIGALRM between setting the
7853 timer, and suspending (a couple of lines later). If the interval was short
7854 and the sigsuspend() was delayed until after it had expired, the suspension
7855 never ended. On busy systems this could lead to processes getting stuck for
7858 6. Some uncommon configurations may cause a lookup to happen in a queue runner
7859 process, before it forks any delivery processes. The open lookup caching
7860 mechanism meant that the open file or database connection was passed into
7861 the delivery process. The problem was that delivery processes always tidy
7862 up cached lookup data. This could cause a problem for the next delivery
7863 process started by the queue runner, because the external queue runner
7864 process does not know about the closure. So the next delivery process
7865 still has data in the lookup cache. In the case of a file lookup, there was
7866 no problem because closing a file descriptor in a subprocess doesn't affect
7867 the parent. However, if the lookup was caching a connection to a database,
7868 the connection was closed, and the second delivery process was likely to
7869 see errors such as "PGSQL: query failed: server closed the connection
7870 unexpectedly". The problem has been fixed by closing all cached lookups
7871 in a queue runner before running a delivery process.
7873 7. Compiler warning on Linux for the second argument of iconv(), which doesn't
7874 seem to have the "const" qualifier which it has on other OS. I've
7877 8. Change 4.21/2 was too strict. It is only if there are two authenticators
7878 *of the same type* (client or server) with the same public name that an
7879 error should be diagnosed.
7881 9. When Exim looked up a host name for an IP address, but failed to find the
7882 original IP address when looking up the host name (a safety check), it
7883 output the message "<ip address> does not match any IP for NULL", which was
7884 confusing, to say the least. The bug was that the host name should have
7885 appeared instead of "NULL".
7887 10. Since release 3.03, if Exim is called by a uid other than root or the Exim
7888 user that is built into the binary, and the -C or -D options is used, root
7889 privilege is dropped before the configuration file is read. In addition,
7890 logging is switched to stderr instead of the normal log files. If the
7891 configuration then re-defines the Exim user, the unprivileged environment
7892 is probably not what is expected, so Exim logs a panic warning message (but
7895 However, if deliver_drop_privilege is set, the unprivileged state may well
7896 be exactly what is intended, so the warning has been cut out in that case,
7897 and Exim is allowed to try to write to its normal log files.
7903 1. smtp_return_error_details was not giving details for temporary sender
7904 or receiver verification errors.
7906 2. Diagnose a configuration error if two authenticators have the same public
7909 3. Exim used not to create the message log file for a message until the first
7910 delivery attempt. This could be confusing when incoming messages were held
7911 for policy or load reasons. The message log file is now created at the time
7912 the message is received, and an initial "Received" line is written to it.
7914 4. The automatically generated man page for command line options had a minor
7915 bug that caused no ill effects; however, a more serious problem was that
7916 the procedure for building the man page automatically didn't always
7917 operate. Consequently, release 4.20 contains an out-of-date version. This
7918 shouldn't happen again.
7920 5. When building Exim with embedded Perl support, the script that builds the
7921 Makefile was calling 'perl' to find its compile-time parameters, ignoring
7922 any setting of PERL_COMMAND in Local/Makefile. This is now fixed.
7924 6. The freeze_tell option was not being used for messages that were frozen on
7925 arrival, either by an ACL or by local_scan().
7927 7. Added the smtp_incomplete_transaction log selector.
7929 8. After STARTTLS, Exim was not forgetting that it had advertised AUTH, so it
7930 was accepting AUTH without a new EHLO.
7932 9. Added tls_remember_esmtp to cope with YAEB. This allows AUTH and other
7933 ESMTP extensions after STARTTLS without a new EHLO, in contravention of the
7936 10. Logging of TCP/IP connections (when configured) now happens in the main
7937 daemon process instead of the child process, so that the TCP/IP connection
7938 count is more accurate (but it can never be perfect).
7940 11. The use of "drop" in a nested ACL was not being handled correctly in the
7941 outer ACL. Now, if condition failure induced by the nested "drop" causes
7942 the outer ACL verb to deny access ("accept" or "discard" after "endpass",
7943 or "require"), the connection is dropped.
7945 12. Similarly, "discard" in a nested ACL wasn't being handled. A nested ACL
7946 that yield "discard" can now be used with an "accept" or a "discard" verb,
7947 but an error is generated for any others (because I can't see a useful way
7948 to define what should happen).
7950 13. When an ACL is read dynamically from a file (or anywhere else), the lines
7951 are now processed in the same way as lines in the Exim configuration file.
7952 In particular, continuation lines are supported.
7954 14. Added the "dnslists = a.b.c!=n.n.n.n" feature.
7956 15. Added -ti meaning -t -i.
7958 16. Check for letters, digits, hyphens, and dots in the names of dnslist
7959 domains, and warn by logging if others are found.
7961 17. At least on BSD, alignment is not guaranteed for the array of ifreq's
7962 returned from GIFCONF when Exim is trying to find the list of interfaces on
7963 a host. The code in os.c has been modified to copy each ifreq to an aligned
7964 structure in all cases.
7966 Also, in some cases, the returned ifreq's were being copied to a 'struct
7967 ifreq' on the stack, which was subsequently passed to host_ntoa(). That
7968 means the last couple of bytes of an IPv6 address could be chopped if the
7969 ifreq contained only a normal sockaddr (14 bytes storage).
7971 18. Named domain lists were not supported in the hosts_treat_as_local option.
7972 An entry such as +xxxx was not recognized, and was treated as a literal
7975 19. Ensure that header lines added by a DATA ACL are included in the reject log
7976 if the ACL subsequently rejects the message.
7978 20. Upgrade the cramtest.pl utility script to use Digest::MD5 instead of just
7979 MD5 (which is deprecated).
7981 21. When testing a filter file using -bf, Exim was writing a message when it
7982 took the sender from a "From " line in the message, but it was not doing so
7983 when it took $return_path from a Return-Path: header line. It now does.
7985 22. If the contents of a "message" modifier for a "warn" ACL verb do not begin
7986 with a valid header line field name (a series of printing characters
7987 terminated by a colon, Exim now inserts X-ACL-Warn: at the beginning.
7989 23. Changed "disc" in the source to "disk" to conform to the documentation and
7990 the book and for uniformity.
7992 24. Ignore Sendmail's -Ooption=value command line item.
7994 25. When execve() failed while trying to run a command in a pipe transport,
7995 Exim was returning EX_UNAVAILABLE (69) from the subprocess. However, this
7996 could be confused with a return value of 69 from the command itself. This
7997 has been changed to 127, the value the shell returns if it is asked to run
7998 a non-existent command. The wording for the related log line suggests a
7999 non-existent command as the problem.
8001 26. If received_header_text expands to an empty string, do not add a Received:
8002 header line to the message. (Well, it adds a token one on the spool, but
8003 marks it "old" so that it doesn't get used or transmitted.)
8005 27. Installed eximstats 1.28 (addition of -nt option).
8007 28. There was no check for failure on the call to getsockname() in the daemon
8008 code. This can fail if there is a shortage of resources on the system, with
8009 ENOMEM, for example. A temporary error is now given on failure.
8011 29. Contrary to the C standard, it seems that in some environments, the
8012 equivalent of setlocale(LC_ALL, "C") is not obeyed at the start of a C
8013 program. Exim now does this explicitly; it affects the formatting of
8014 timestamps using strftime().
8016 30. If exiqsumm was given junk data, it threw up some uninitialized variable
8017 complaints. I've now initialized all the variables, to avoid this.
8019 32. Header lines added by a system filter were not being "seen" during
8020 transport-time rewrites.
8022 33. The info_callback() function passed to OpenSSL is set up with type void
8023 (*)(SSL *, int, int), as described somewhere. However, when calling the
8024 function (actually a macro) that sets it up, the type void(*)() is
8025 expected. I've put in a cast to prevent warnings from picky compilers.
8027 34. If a DNS black list lookup found a CNAME record, but there were no A
8028 records associated with the domain it pointed at, Exim crashed.
8030 35. If a DNS black list lookup returned more than one A record, Exim ignored
8031 all but the first. It now scans all returned addresses if a particular IP
8032 value is being sought. In this situation, the contents of the
8033 $dnslist_value variable are a list of all the addresses, separated by a
8036 36. Tightened up the rules for host name lookups using reverse DNS. Exim used
8037 to accept a host name and all its aliases if the forward lookup for any of
8038 them yielded the IP address of the incoming connection. Now it accepts only
8039 those names whose forward lookup yields the correct IP address. Any other
8040 names are discarded. This closes a loophole whereby a rogue DNS
8041 administrator could create reverse DNS records to break through a
8042 wildcarded host restriction in an ACL.
8044 37. If a user filter or a system filter that ran in a subprocess used any of
8045 the numerical variables ($1, $2 etc), or $thisaddress, in a pipe command,
8046 the wrong values were passed to the pipe command ($thisaddress had the
8047 value of $0, $0 had the value of $1, etc). This bug was introduced by
8048 change 4.11/101, and not discovered because I wrote an inadequate test. :-(
8050 38. Improved the line breaking for long SMTP error messages from ACLs.
8051 Previously, if there was no break point between 40 and 75 characters, Exim
8052 left the rest of the message alone. Two changes have been made: (a) I've
8053 reduced the minimum length to 35 characters; (b) if it can't find a break
8054 point between 35 and 75 characters, it looks ahead and uses the first one
8055 that it finds. This may give the occasional overlong line, but at least the
8056 remaining text gets split now.
8058 39. Change 82 of 4.11 was unimaginative. It assumed the limit on the number of
8059 file descriptors might be low, and that setting 1000 would always raise it.
8060 It turns out that in some environments, the limit is already over 1000 and
8061 that lowering it causes trouble. So now Exim takes care not to decrease it.
8063 40. When delivering a message, the value of $return_path is set to $sender_
8064 address at the start of routing (routers may change the value). By an
8065 oversight, this default was not being set up when an address was tested by
8066 -bt or -bv, which affected the outcome if any router or filter referred to
8069 41. The idea of the "warn" ACL verb is that it adds a header or writes to the
8070 log only when "message" or "log_message" are set. However, if one of the
8071 conditions was an address verification, or a call to a nested ACL, the
8072 messages generated by the underlying test were being passed through. This
8073 no longer happens. The underlying message is available in $acl_verify_
8074 message for both "message" and "log_message" expansions, so it can be
8075 passed through if needed.
8077 42. Added RFC 2047 interpretation of header lines for $h_ expansions, with a
8078 new expansion $bh_ to give the encoded byte string without charset
8079 translation. Translation happens only if iconv() is available; HAVE_ICONV
8080 indicates this at build time. HEADERS_CHARSET gives the charset to
8081 translate to; headers_charset can change it in the configuration, and
8082 "headers charset" can change it in an individual filter file.
8084 43. Now that we have a default RFC 2047 charset (see above), the code in Exim
8085 that creates RFC 2047 encoded "words" labels them as that charset instead
8086 of always using iso-8859-1. The cases are (i) the explicit ${rfc2047:
8087 expansion operator; (ii) when Exim creates a From: line for a local
8088 message; (iii) when a header line is rewritten to include a "phrase" part.
8090 44. Nasty bug in exiqsumm: the regex to skip already-delivered addresses was
8091 buggy, causing it to skip the first lines of messages whose message ID
8092 ended in 'D'. This would not have bitten before Exim release 4.14, because
8093 message IDs were unlikely to end in 'D' before then. The effect was to have
8094 incorrect size information for certain domains.
8096 45. #include "config.h" was missing at the start of the crypt16.c module. This
8097 caused trouble on Tru64 (aka OSF1) systems, because HAVE_CRYPT16 was not
8100 46. If there was a timeout during a "random" callout check, Exim treated it as
8101 a failure of the random address, and carried on sending RSET and the real
8102 address. If the delay was just some slowness somewhere, the response to the
8103 original RCPT would be taken as a response to RSET and so on, causing
8104 mayhem of various kinds.
8106 47. Change 50 for 4.20 was a heap of junk. I don't know what I was thinking
8107 when I implemented it. It didn't allow for the fact that some option values
8108 may legitimately be negative (e.g. size_addition), and it didn't even do
8109 the right test for positive values.
8111 48. Domain names in DNS records are case-independent. Exim always looks them up
8112 in lower case. Some resolvers return domain names in exactly the case they
8113 appear in the zone file, that is, they may contain uppercase letters. Not
8114 all resolvers do this - some return always lower case. Exim was treating a
8115 change of case by a resolver as a change of domain, similar to a widening
8116 of a domain abbreviation. This triggered its re-routing code and so it was
8117 trying to route what was effectively the same domain again. This normally
8118 caused routing to fail (because the router wouldn't handle the domain
8119 twice). Now Exim checks for this case specially, and just changes the
8120 casing of the domain that it ultimately uses when it transmits the message
8123 49. Added Sieve (RFC 3028) support, courtesy of Michael Haardt's contributed
8126 50. If a filter generated a file delivery with a non-absolute name (possible if
8127 no home directory exists for the router), the forbid_file option was not
8130 51. Added '&' feature to dnslists, to provide bit mask matching in addition to
8131 the existing equality matching.
8133 52. Exim was using ints instead of ino_t variables in some places where it was
8134 dealing with inode numbers.
8136 53. If TMPDIR is defined in Local/Makefile (default in src/EDITME is
8137 TMPDIR="/tmp"), Exim checks for the presence of an environment variable
8138 called TMPDIR, and if it finds it is different, it changes its value.
8140 54. The smtp_printf() function is now made available to local_scan() so
8141 additional output lines can be written before returning. There is also an
8142 smtp_fflush() function to enable the detection of a dropped connection.
8143 The variables smtp_input and smtp_batched_input are exported to
8146 55. Changed the default runtime configuration: the message "Unknown user"
8147 has been removed from the ACL, and instead placed on the localuser router,
8148 using the cannot_route_message feature. This means that any verification
8149 failures that generate their own messages won't get overridden. Similarly,
8150 the "Unrouteable address" message that was in the ACL for unverifiable
8151 relay addresses has also been removed.
8153 56. Added hosts_avoid_esmtp to the smtp transport.
8155 57. The exicyclog script was not checking for the esoteric option
8156 CONFIGURE_FILE_USE_EUID in the Local/Makefile. It now does this, but it
8157 will work only if exicyclog is run under the appropriate euid.
8159 58. Following a discussion on the list, the rules by which Exim recognises line
8160 endings on incoming messages have been changed. The -dropcr and drop_cr
8161 options are now no-ops, retained only for backwards compatibility. The
8162 following line terminators are recognized: LF CRLF CR. However, special
8163 processing applies to CR:
8165 (i) The sequence CR . CR does *not* terminate an incoming SMTP message,
8166 nor a local message in the state where . is a terminator.
8168 (ii) If a bare CR is encountered in a header line, an extra space is added
8169 after the line terminator so as not to end the header. The reasoning
8170 behind this is that bare CRs in header lines are most likely either
8171 to be mistakes, or people trying to play silly games.
8173 59. The size of a message, as listed by "-bp" or in the Exim monitor window,
8174 was being incorrectly given as 18 bytes larger than it should have been.
8175 This is a VOB (very old bug).
8177 60. This may never have affected anything current, but just in case it has:
8178 When the local host is found other than at the start of a list of hosts,
8179 the local host, those with the same MX, and any that follow, are discarded.
8180 When the list in question was part of a longer list of hosts, the following
8181 hosts (not currently being processed) were also being discarded. This no
8182 longer happens. I'm not sure if this situation could ever has previously
8185 61. Added the "/MX" feature to lists of hosts in the manualroute and query
8188 62. Whenever Exim generates a new message, it now adds an Auto-Submitted:
8189 header. This is something that is recommended in a new Internet Draft, and
8190 is something that is documented as being done by Sendmail. There are two
8191 possible values. For messages generated by the autoreply transport, Exim
8194 Auto-Submitted: auto-replied
8196 whereas for all other generated messages (e.g. bounces) it adds
8198 Auto-Submitted: auto-generated
8200 63. The "personal" condition in filters now includes a test for the
8201 Auto-Submitted: header. If it contains the string "auto-" the message it
8202 not considered personal.
8204 64. Added rcpt_include_affixes as a generic transport option.
8206 65. Added queue_only_override (default true).
8208 66. Added the syslog_duplication option.
8210 67. If what should have been the first header line of a message consisted of
8211 a space followed by a colon, Exim was mis-interpreting it as a header line.
8212 It isn't of course - it is syntactically invalid and should therefore be
8213 treated as the start of the message body. The misbehaviour could have
8214 caused a number of strange effects, including loss of data in subsequent
8215 header lines, and spool format errors.
8217 68. Formerly, the AUTH parameter on a MAIL command was trusted only if the
8218 client host had authenticated. This control can now be exercised by an ACL
8219 for more flexibility.
8221 69. By default, callouts do not happen when testing with -bh. There is now a
8222 variant, -bhc, which does actually run the callout code, including
8223 consulting and updating the callout cache.
8225 70. Added support for saslauthd authentication, courtesy of Alexander
8228 71. If statvfs() failed on the spool or log directories while checking their
8229 size for availability, Exim confusingly gave the error "space shortage".
8230 Furthermore, in debugging mode it crashed with a floating point exception.
8231 These checks are done if check_{spool,log}_{space,inodes} are set, and when
8232 an SMTP message arrives with SIZE= on the MAIL command. As this is a really
8233 serious problem, Exim now writes to the main and panic logs when this
8234 happens, with details of the failure. It then refuses to accept the
8235 incoming message, giving the message "spool directory problem" or "log
8236 directory problem" with a 421 code for SMTP messages.
8238 72. When Exim is about to re-exec itself, it ensures that the file descriptors
8239 0, 1, and 2 exist, because some OS complain for execs without them (see
8240 ChangeLog 4.05/30). If necessary, Exim opens /dev/null to use for these
8241 descriptors. However, the code omitted to check that the open succeeded,
8242 causing mysterious errors if for some reason the permissions on /dev/null
8243 got screwed. Now Exim writes a message to the main and panic logs, and
8244 bombs out if it can't open /dev/null.
8246 73. Re-vamped the way daemon_smtp_port, local_interfaces, and -oX work and
8247 interact so that it is all more flexible. It is supposed to remain
8248 backwards compatible. Also added extra_local_interfaces.
8250 74. Invalid data sent to a SPA (NTLM) server authenticator could cause the code
8251 to bomb out with an assertion failure - to the client this appears as a
8252 connection drop. This problem occurs in the part of the code that was taken
8253 from the Samba project. Fortunately, the assertion is in a very simple
8254 function, so I have fixed this by reproducing the function inline in the
8255 one place where it is called, and arranging for authentication to fail
8256 instead of killing the process with assert().
8258 75. The SPA client code was not working when the server requested OEM rather
8259 than Unicode encoding.
8261 76. Added code to make require_files with a specific uid setting more usable in
8262 the case where statting the file as root fails - usually a non-root-mounted
8263 NFS file system. When this happens and the failure is EACCES, Exim now
8264 forks a subprocess and does the per-uid checking as the relevant uid.
8266 77. Added process_log_path.
8268 78. If log_file_path was not explicitly set, a setting of check_log_space or
8269 check_log_inodes was ignored.
8271 79. If a space check for the spool or log partitions fails, the incident is now
8272 logged. Of course, in the latter case the data may get lost...
8274 80. Added the %p formatting code to string_format() so that it can be used to
8275 print addresses in debug_print(). Adjusted all the address printing in the
8276 debugging in store.c to use %p rather than %d.
8278 81. There was a concern that a line of code in smtp_in.c could overflow a
8279 buffer if a HELO/EHLO command was given followed by 500 or so spaces. As
8280 initially expressed, the concern was not well-founded, because trailing
8281 spaces are removed early. However, if the trailing spaces were followed by
8282 a NULL, they did not get removed, so the overflow was possible. Two fixes
8285 (a) I re-wrote the offending code in a cleaner fashion.
8286 (b) If an incoming SMTP command contains a NULL character, it is rejected
8289 82. When Exim changes uid/gid to the Exim user at daemon start time, it now
8290 runs initgroups(), so that if the Exim user is in any additional groups,
8291 they will be used during message reception.
8297 The change log for 4.20 and earlier releases has been archived.
git://git.exim.org / exim.git / blob