1 This document describes *changes* to previous versions, that might
2 affect Exim's operation, with an unchanged configuration file. For new
3 options, and new features, see the NewStuff file next to this ChangeLog.
8 JH/01 The hosts_connection_nolog main option now also controls "no MAIL in
9 SMTP connection" log lines.
11 JH/02 Option default value updates:
12 - queue_fast_ramp (main) true (was false)
13 - remote_max_parallel (main) 4 (was 2)
15 JH/03 Cache static regex pattern compilations, for use by ACLs.
17 JH/04 Bug 2903: avoid exit on an attempt to rewrite a malformed address.
18 Make the rewrite never match and keep the logging. Trust the
19 admin to be using verify=header-syntax (to actually reject the message).
21 JH/05 Follow symlinks for placing a watch on TLS creds files. This means
22 (under Linux) we watch the dir containing the final file; previously
23 it would be the dir with the first symlink. We still do not monitor
26 JH/06 Check for bad chars in rDNS for sender_host_name. The OpenBSD (at least)
27 dn_expand() is happy to pass them through.
29 JH/07 OpenSSL Fix auto-reload of changed server OCSP proof. Previously, if
30 the file with the proof had an unchanged name, the new proof(s) were
31 loaded on top of the old ones (and nover used; the old ones were stapled).
37 JH/01 Move the wait-for-next-tick (needed for unique messmage IDs) from
38 after reception to before a subsequent reception. This should
39 mean slightly faster delivery, and also confirmation of reception
42 JH/02 Move from using the pcre library to pcre2. The former is no longer
43 being developed or supported (by the original developer).
45 JH/03 Constification work in the filters module required a major version
46 bump for the local-scan API. Specifically, the "headers_charset"
47 global which is visible via the API is now const and may therefore
48 not be modified by local-scan code.
50 JH/04 Fix ClamAV TCP use under FreeBSD. Previously the OS-specific shim for
51 sendfile() didi not account for the way the ClamAV driver code called it.
53 JH/05 Bug 2819: speed up command-line messages being read in. Previously a
54 time check was being done for every character; replace that with one
57 JH/06 Bug 2815: Fix ALPN sent by server under OpenSSL. Previously the string
58 sent was prefixed with a length byte.
60 JH/07 Change the SMTP feature name for pipelining connect to be compliant with
61 RFC 5321. Previously Dovecot (at least) would log errors during
64 JH/08 Remove stripping of the binaries from the FreeBSD build. This was added
65 in 4.61 without a reason logged. Binaries will be bigger, which might
66 matter on diskspace-constrained systems, but debug is easier.
68 JH/09 Fix macro-definition during "-be" expansion testing. The move to
69 write-protected store for macros had not accounted for these runtime
70 additions; fix by removing this protection for "-be" mode.
72 JH/10 Convert all uses of select() to poll(). FreeBSD 12.2 was found to be
73 handing out large-numbered file descriptors, violating the usual Unix
74 assumption (and required by Posix) that the lowest possible number will be
75 allocated by the kernel when a new one is needed. In the daemon, and any
76 child procesees, values higher than 1024 (being bigger than FD_SETSIZE)
77 are not useable for FD_SET() [and hence select()] and overwrite the stack.
78 Assorted crashes happen.
80 JH/11 Fix use of $sender_host_name in daemon process. When used in certain
81 main-section options or in a connect ACL, the value from the first ever
82 connection was never replaced for subsequent connections. Found by
85 JH/12 Bug 2838: Fix for i32lp64 hard-align platforms. Found for SPARC Linux,
86 though only once PCRE2 was introduced: the memory accounting used under
87 debug offset allocations by an int, giving a hard trap in early startup.
88 Change to using a size_t. Debug and fix by John Paul Adrian Glaubitz.
90 JH/13 Bug 2845: Fix handling of tls_require_ciphers for OpenSSL when a value
91 with underbars is given. The write-protection of configuration introduced
92 in 4.95 trapped when normalisation was applied to an option not needing
95 JH/14 Bug 1895: TLS: Deprecate RFC 5114 Diffie-Hellman parameters.
97 JH/15 Fix a resource leak in *BSD. An off-by-one error resulted in the daemon
98 failing to close the certificates directory, every hour or any time it
101 JH/16 Debugging initiated by an ACL control now continues through into routing
102 and transport processes. Previously debugging stopped any time Exim
103 re-execs, or for processing a queued message.
105 JH/17 The "expand" debug selector now gives more detail, specifically on the
106 result of expansion operators and items.
108 JH/18 Bug 2751: Fix include_directory in redirect routers. Previously a
109 bad comparison between the option value and the name of the file to
110 be included was done, and a mismatch was wrongly identified.
111 4.88 to 4.95 are affected.
113 JH/19 Support for Berkeley DB versions 1 and 2 is withdrawn.
115 JH/20 When built with NDBM for hints DB's check for nonexistence of a name
116 supplied as the db file-pair basename. Previously, if a directory
117 path was given, for example via the autoreply "once" option, the DB
118 file.pag and file.dir files would be created in that directory's
121 JH/21 Remove the "allow_insecure_tainted_data" main config option and the
122 "taint" log_selector. These were previously deprecated.
124 JH/22 Fix static address-list lookups to properly return the matched item.
125 Previously only the domain part was returned.
127 JH/23 Bug 2864: FreeBSD: fix transport hang after 4xx/5xx response. Previously
128 the call into OpenSSL to send a TLS Close was being repeated; this
129 resulted in the library waiting for the peer's Close. If that was never
130 sent we waited forever. Fix by tracking send calls.
132 JH/24 The ${run} expansion item now expands its command string elements after
133 splitting. Previously it was before; the new ordering makes handling
134 zero-length arguments simpler. The old ordering can be obtained by
135 appending a new option "preexpand", after a comma, to the "run".
137 JH/25 Taint-check exec arguments for transport-initiated external processes.
138 Previously, tainted values could be used. This affects "pipe", "lmtp" and
139 "queryprogram" transport, transport-filter, and ETRN commands.
140 The ${run} expansion is also affected: in "preexpand" mode no part of
141 the command line may be tainted, in default mode the executable name
144 JH/26 Fix CHUNKING on a continued-transport. Previously the usabliility of
145 the the facility was not passed across execs, and only the first message
146 passed over a connection could use BDAT; any further ones using DATA.
148 JH/27 Support the PIPECONNECT facility in the smtp transport when the helo_data
149 uses $sending_ip_address and an interface is specified.
150 Previously any use of the local address in the EHLO name disabled
151 PIPECONNECT, the common case being to use the rDNS of it.
153 JH/28 OpenSSL: fix transport-required OCSP stapling verification under session
154 resumption. Previously verify failed because no certificate status is
155 passed on the wire for the restarted session. Fix by using the recorded
156 ocsp status of the stored session for the new connection.
158 JH/29 TLS resumption: the key for session lookup in the client now includes
159 more info that a server could potentially use in configuring a TLS
160 session, avoiding oferring mismatching sessions to such a server.
161 Previously only the server IP was used.
163 JH/30 Fix string_copyn() for limit greater than actual string length.
164 Previously the copied amount was the limit, which could result in a
165 overlapping memcpy for newly allocated destination soon after a
166 source string shorter than the limit. Found/investigated by KM.
168 JH/31 Bug 2886: GnuTLS: Do not free the cached creds on transport connection
169 close; it may be needed for a subsequent connection. This caused a
170 SEGV on primary-MX defer. Found/investigated by Gedalya & Andreas.
172 JH/32 Fix CHUNKING for a second message on a connection when the first was
173 rejected. Previously we did not reset the chunking-offered state, and
174 erroneously rejected the BDAT command. Investigation help from
177 JH/33 Fis ${srs_encode ...} to handle an empty sender address, now returning
178 an empty address. Previously the expansion returned an error.
180 HS/01 Bug 2855: Handle a v4mapped sender address given us by a frontending
181 proxy. Previously these were misparsed, leading to paniclog entries.
187 JH/01 Bug 1329: Fix format of Maildir-format filenames to match other mail-
188 related applications. Previously an "H" was used where available info
189 says that "M" should be, so change to match.
191 JH/02 Bug 2587: Fix pam expansion condition. Tainted values are commonly used
192 as arguments, so an implementation trying to copy these into a local
193 buffer was taking a taint-enforcement trap. Fix by using dynamically
194 created buffers. Similar fix for radius expansion condition.
196 JH/03 Bug 2586: Fix listcount expansion operator. Using tainted arguments is
197 reasonable, eg. to count headers. Fix by using dynamically created
198 buffers rather than a local. Do similar fixes for ACL actions "dcc",
199 "log_reject_target", "malware" and "spam"; the arguments are expanded
200 so could be handling tainted values.
202 JH/04 Bug 2590: Fix -bi (newaliases). A previous code rearrangement had
203 broken the (no-op) support for this sendmail command. Restore it
204 to doing nothing, silently, and returning good status.
206 JH/05 Bug 2593: Fix "vacation" in Exim filter. Previously, when a "once"
207 record path was given (or the default used) without a leading directory
208 path, an error occurred on trying to open it. Use the transport's working
211 JH/06 Bug 2594: Change the name used for certificate name checks in the smtp
212 transport. Previously it was the name on the DNS A-record; use instead
213 the head of the CNAME chain leading there (if there is one). This seems
214 to align better with RFC 6125.
216 JH/07 Bug 2597: Fix a resource leak. Using a lookup in obtaining a value for
217 smtp_accept_max_per_host allocated resources which were not released
218 when the limit was exceeded. This eventually crashed the daemon. Fix
219 by adding a release action in that path.
221 JH/08 Bug 2598: Fix verify ACL condition. The options for the condition are
222 expanded; previously using tainted values was rejected. Fix by using
223 dynamically-created buffers.
225 JH/09 Relax restrictions on ACL verify condition needing access to message
226 headers. Previously they were only permitted in data and non-smtp ACLs;
227 permit also mime, dkim, prdr quit and notquit. Applies to header-syntax,
228 not_blind, header_sender and header_names_ascii verification.
230 JH/10 Bug 2603: Fix coding of string copying to only evaluate arguments once.
231 Previously a macro used one argument twice; when called with the
232 argument as an expression having side-effects, incorrect operation
233 resulted. Use an inlineable function.
235 JH/11 Bug 2604: Fix request to cutthrough-deliver when a connection is already
236 held open for a verify callout. Previously this wan not accounted for
237 and a corrupt onward SMTP conversation resulted.
239 JH/12 Bug 2607: Fix the ${srs_encode } expansion to handle quoted local_parts.
240 Previously they were embedded naively in the constructed address; when
241 needed, strip the quoting and quote the entire local_part.
242 Also make the inbound_srs expansion condition handle quoting.
244 JH/13 Fix dsearch "subdir" filter to ignore ".". Previously only ".." was
245 excluded, not matching the documentation.
247 JH/14 Bug 2606: Fix a segfault in sqlite lookups. When no, or a bad, filename
248 was given for the sqlite_dbfile a trap resulted.
250 JH/15 Bug 2620: Fix "spam" ACL condition. Previously, tainted values for the
251 "name" argument resulted in a trap. There is no reason to disallow such;
252 this was a coding error.
254 JH/16 Bug 2615: Fix pause during message reception, on systems that have been
255 suspended/resumed. The Linux CLOCK_MONOTONIC does not account for time
256 spent suspended, ignoring the POSIX definition. Previously we assumed
257 it did and a constant offset from real time could be used as a correction.
258 Change to using the same clock source for the start-of-message and the
259 post-message next-tick-wait. Also change to using CLOCK_BOOTTIME if it
260 exists, just to get a clock slightly more aligned to reality.
262 JH/17 Bug 2295: Fix DKIM signing to always semicolon-terminate. Although the
263 RFC says it is optional some validators care. The missing char was not
264 intended but triggered by a line-wrap alignment. Discovery and fix by
265 Guillaume Outters, hacked on by JH.
267 JH/18 Bug 2617: Fix a taint trap in parse_fix_phrase(). Previously when the
268 name being quoted was tainted a trap would be taken. Fix by using
269 dynamically created buffers. The routine could have been called by a
270 rewrite with the "h" flag, by using the "-F" command-line option, or
271 by using a "name=" option on a control=submission ACL modifier.
273 JH/19 SPF: change the Authentication-Results expansion component to give
274 smtp.helo when the sender domain is empty. Previously it gave
277 JH/20 Bug 2631: ACL dnslist conditions now ignore and log any lookups returns
278 not in 127.0.0.0/8 to help in spotting list domains taken over by a
279 domain-parking registrar.
281 JH/21 Bug 2630: Fix eol-replacement string for the ${readsocket } expansion.
282 Previously when a whitespace character was specified it was not inserted
283 after removing the newline.
285 JH/22 Bug 2265: Force SNI usage for smtp transport DANE'd connections, to be
286 the domain part of the recipient address. This overrides any tls_sni
287 option set, which was previously used.
289 JH/23 Logging: with the +tls_sni log_selector, do not wrap the received SNI
292 JH/24 Bug 2634: Fix a taint trap seen on NetBSD: the testing coded for
293 is_tainted() had an off-by-one error in the overenthusiastic direction.
294 Find and fix by Gavan. Although NetBSD is not a supported platform for
295 4.94 this bug could affect other platforms.
297 PP/01 Fix default prime selection to be consistent.
298 One path used ike23 still, instead of exim.dev.20160529.3; now both
299 execution flows will use the same DH primes (currently
300 exim.dev.20160529.3).
302 JH/25 OpenSSL: Fix back-compatibility behaviour surrounding tls_certificates
303 option in smtp transport, to match the documentation. Previously
304 verification was not being done in some cases where it should have been.
306 JH/26 Bug 2646: fix a memory usage issue in ldap lookups. Previously, when more
307 than one server was defined and depending on the platform memory layout
308 details, an internal consistency trap could be hit while walking the list
311 JH/27 Bug 2648: fix the passing of an authenticator public-name through spool
312 files. The value is used by the authresults expansion item. Previously
313 if this was used in a router or transport, a crash could result.
315 JH/28 Fix spurious logging of select error. Some platforms, notably FreeBSD,
316 have a sufficient incidence of EINTR returns from select that an
317 interaction with other operations done by the main daemon loop exposed
318 a bug in the error-handling. This was benign apart from the log
321 JH/29 Bug 2675: add outgoing-interface I= element to deferred "==" log lines,
322 for consistency with delivered "=>" and failed "**" lines. While we're
323 there, handle PRX and TFO.
325 JH/30 Bug 2677: fix matching of long addresses. Since 4.93 a limit of 256 was
326 applied. This resulted, if any header-line rewrite rules were configured,
327 in a panic-log triggerable by sending a message with a long address in
328 a header. Fix by increasing the arbitrary limit to larger than a single
329 (dewrapped) 5322 header line maximum size.
331 JH/31 The ESMTP option name advertised for the SUPPORT_EARLY_PIPE build option
332 is changed from X_PIPE_CONNECT to PIPE_CONNECT. This is in line with
333 RFC 6648 which deprecates X- options in protocols as a general practice.
334 Changeover between the implementations is handled by the mechanisms
337 JH/32 Bug 2599: fix delay of delivery to a local address where there is also
338 a remote which uses callout/hold. Previously the local was queued.
340 JH/33 Fix a taint trap in the ${listextract } expansion when the source data
343 JH/34 Fix the placement of a multiple-message delivery marker in the delivery
344 log line. The asterisk is now consistently appended to the remote IP
345 (and port, if given), and will also be provided on defer and fail log
346 lines. Previously it could be placed on the local IP if that was being
347 logged, and was only provided on delivery lines.
349 JH/35 Bug 2343: Harden exim_tidydb against corrupt wait- files.
351 JH/36 Bug 2687: Fix interpretation of multiple ^ chars in a plaintext
352 authenticator client_send option. Previously the next char, after a pair
353 was collapsed, was taken verbatim (so ^^^foo became ^^foo; ^^^^foo became
354 ^^\x00foo). Fixed to get ^\x00foo and ^^foo respectively to match the
355 documentation. There is still no way to get a leading ^ immediately
356 after a NUL (ie. for the password of a PLAIN method authenticator.
358 JH/37 Enforce the expected size, for fixed-size records read from hints-DB
359 files. For bad sizes read, delete the record and whine to paniclog.
361 JH/38 When logging an AUTH failure, as server, do not include sensitive
362 information. Previously, the credentials would be included if given
363 as part of the AUTH command line and an ACL denied authentication.
365 JH/39 Bug 2691: fix $local_part_data. When the matching list element
366 referred to a file, bad data was returned. This likely also affected
369 JH/40 The gsasl authenticator now supports caching of the salted password
370 generated by the client-side implementation. This required the addition
371 of a new variable: $auth4.
373 JH/41 Fix daemon SIGHUP on FreeBSD. Previously, a named socket for IPC was
374 left undeleted; the attempt to re-create it then failed - resulting in
375 the usual "SIGHUP tp have daemon reload configuration" to not work.
376 This affected any platform not supporting "abstract" Unix-domain
377 sockets (i.e. not Linux).
379 JH/42 Bug 2693: Harden against a peer which reneges on a 452 "too many
380 recipients" response to RCPT in a later response, with a 250. The
381 previous coding assumed this would not happen, and under PIPELINING
382 would result in both lost and duplicate recipients for a message.
384 JH/43 Bug 2694: Fix weighted distribution of work to multiple spamd servers.
385 Previously the weighting was incorrectly applied. Similar fix for socks
386 proxies. Found and fixed by Heiko Schlichting.
388 JH/44 Bug 2701: Fix list-expansion of dns_ipv4_lookup. Previously, it did
389 not handle sub-lists included using the +namedlist syntax. While
390 investigating, the same found for dns_trust_aa, dns_again_means_nonexist,
391 dnssec_require_domains, dnssec_request_domains, srv_fail_domains,
394 JH/45 Use a (new) separate store pool-pair for DKIM verify working data.
395 Previously the permanent pool was used, so the sore could not be freed.
396 This meant a connection with many messages would use continually-growing
399 JH/46 Use an exponentially-increasing block size when malloc'ing store. Do it
400 per-pool so as not to waste too much space. Previously a constant size
401 was used which resulted in O(n^2) behaviour; now we get O(n log n) making
402 DOS attacks harder. The cost is wasted memory use in the larger blocks.
404 JH/47 Use explicit alloc/free for DNS lookup workspace. This permits using the
405 same space repeatedly, and a smaller process footprint.
407 JH/48 Use a less bogus-looking filename for a temporary used for DH-parameters
408 for GnuTLS. Previously the name started "%s" which, while not a bug,
409 looked as if if might be one.
411 JH/49 Bug 2710: when using SOCKS for additional messages after the first (a
412 "continued connection") make the $proxy_* variables available. Previously
413 the information was not passed across the exec() call for subsequent
414 transport executions. This also mean that the log lines for the
415 messages can show the proxy information.
417 JH/50 Bug 2672: QT elements in log lines, unless disabled, now exclude the
418 receive time. With modern systems the difference is significant.
419 The historical behaviour can be restored by disabling (a new) log_selector
420 "queue_time_exclusive".
422 JH/51 Taint-check ACL line. Previously, only filenames (for out-of-line ACL
423 content) were specifically tested for. Now, also cover expansions
424 resulting in ACL names and inline ACL content.
426 JH/52 Fix ${ip6norm:} operator. Previously, any trailing line text was dropped,
427 making it unusable in complex expressions.
429 JH/53 Bug 2743: fix immediate-delivery via named queue. Previously this would
430 fail with a taint-check on the spoolfile name, and leave the message
433 HS/01 Enforce absolute PID file path name.
435 HS/02 Handle SIGINT as we handle SIGTERM: terminate the Exim process.
437 PP/01 Add a too-many-bad-recipients guard to the default config's RCPT ACL.
439 PP/02 Bug 2643: Correct TLS DH constants.
440 A missing NUL termination in our code-generation tool had led to some
441 incorrect Diffie-Hellman constants in the Exim source.
442 Reported by kylon94, code-gen tool fix by Simon Arlott.
444 PP/03 Impose security length checks on various command-line options.
445 Fixes CVE-2020-SPRSS reported by Qualys.
447 PP/04 Fix Linux security issue CVE-2020-SLCWD and guard against PATH_MAX
448 better. Reported by Qualys.
450 PP/05 Fix security issue CVE-2020-PFPSN and guard against cmdline invoker
451 providing a particularly obnoxious sender full name.
454 PP/06 Fix CVE-2020-28016 (PFPZA): Heap out-of-bounds write in parse_fix_phrase()
456 PP/07 Refuse to allocate too little memory, block negative/zero allocations.
459 PP/08 Change default for recipients_max from unlimited to 50,000.
461 PP/09 Fix security issue with too many recipients on a message (to remove a
462 known security problem if someone does set recipients_max to unlimited,
463 or if local additions add to the recipient list).
464 Fixes CVE-2020-RCPTL reported by Qualys.
466 PP/10 Fix security issue in SMTP verb option parsing
467 Fixes CVE-2020-EXOPT reported by Qualys.
469 PP/11 Fix security issue in BDAT state confusion.
470 Ensure we reset known-good where we know we need to not be reading BDAT
471 data, as a general case fix, and move the places where we switch to BDAT
472 mode until after various protocol state checks.
473 Fixes CVE-2020-BDATA reported by Qualys.
475 HS/03 Die on "/../" in msglog file names
477 QS/01 Creation of (database) files in $spool_dir: only uid=0 or the uid of
478 the Exim runtime user are allowed to create files.
480 QS/02 PID file creation/deletion: only possible if uid=0 or uid is the Exim
483 QS/03 When reading the output from interpreted forward files we do not
484 pass the pipe between the parent and the interpreting process to
485 executed child processes (if any).
487 QS/04 Always die if requested from internal logging, even is logging is
490 JH/54 DMARC: recent versions of the OpenDMARC library appear to have broken
491 the API; compilation noo longer completes with DMARC support included.
492 This affects 1.4.1-1 on Fedora 33 (1.3.2-3 is functional); and has
493 been reported on other platforms.
495 JH/55 TLS: as server, reject connections with ALPN indicating non-smtp use.
497 JH/56 Make the majority of info read from config files readonly, for defence-in-
498 depth against exploits. Suggestion by Qualys.
499 Not supported on Solaris 10.
501 JH/57 Fix control=fakreject for a custom message containing tainted data.
502 Previously this resulted in a log complaint, due to a re-expansion present
503 since fakereject was originally introduced.
505 JH/58 GnuTLS: Fix certextract expansion. If a second modifier after a tag
506 modifier was given, a loop resulted.
508 JH/59 DKIM: Fix small-message verification under TLS with chunking. If a
509 pipelined SMTP command followed the BDAT LAST then it would be
510 incorrectly treated as part of the message body, causing a verification
513 JH/60 Bug 2805: Fix logging of domain-literals in Message_ID: headers. They
514 require looser validation rules than those for 821-level addresses,
515 which only permit IP addresses.
521 JH/01 Avoid costly startup code when not strictly needed. This reduces time
522 for some exim process initialisations. It does mean that the logging
523 of TLS configuration problems is only done for the daemon startup.
525 JH/02 Early-pipelining support code is now included unless disabled in Makefile.
527 JH/03 DKIM verification defaults no long accept sha1 hashes, to conform to
528 RFC 8301. They can still be enabled, using the dkim_verify_hashes main
531 JH/04 Support CHUNKING from an smtp transport using a transport_filter, when
532 DKIM signing is being done. Previously a transport_filter would always
533 disable CHUNKING, falling back to traditional DATA.
535 JH/05 Regard command-line recipients as tainted.
537 JH/06 Bug 340: Remove the daemon pid file on exit, when due to SIGTERM.
539 JH/07 Bug 2489: Fix crash in the "pam" expansion condition. It seems that the
540 PAM library frees one of the arguments given to it, despite the
541 documentation. Therefore a plain malloc must be used.
543 JH/08 Bug 2491: Use tainted buffers for the transport smtp context. Previously
544 on-stack buffers were used, resulting in a taint trap when DSN information
545 copied from a received message was written into the buffer.
547 JH/09 Bug 2493: Harden ARC verify against Outlook, whick has been seen to mix
548 the ordering of its ARC headers. This caused a crash.
550 JH/10 Bug 2492: Use tainted memory for retry record when needed. Previously when
551 a new record was being constructed with information from the peer, a trap
554 JH/11 Bug 2494: Unset the default for dmarc_tld_file. Previously a naiive
555 installation would get error messages from DMARC verify, when it hit the
556 nonexistent file indicated by the default. Distros wanting DMARC enabled
557 should both provide the file and set the option.
558 Also enforce no DMARC verification for command-line sourced messages.
560 JH/12 Fix an uninitialised flag in early-pipelining. Previously connections
561 could, depending on the platform, hang at the STARTTLS response.
563 JH/13 Bug 2498: Reset a counter used for ARC verify before handling another
564 message on a connection. Previously if one message had ARC headers and
565 the following one did not, a crash could result when adding an
566 Authentication-Results: header.
568 JH/14 Bug 2500: Rewind some of the common-coding in string handling between the
569 Exim main code and Exim-related utities. The introduction of taint
570 tracking also did many adjustments to string handling. Since then, eximon
571 frequently terminated with an assert failure.
573 JH/15 When PIPELINING, synch after every hundred or so RCPT commands sent and
574 check for 452 responses. This slightly helps the inefficieny of doing
575 a large alias-expansion into a recipient-limited target. The max_rcpt
576 transport option still applies (and at the current default, will override
577 the new feature). The check is done for either cause of synch, and forces
578 a fast-retry of all 452'd recipients using a new MAIL FROM on the same
579 connection. The new facility is not tunable at this time.
581 JH/16 Fix the variables set by the gsasl authenticator. Previously a pointer to
582 library live data was being used, so the results became garbage. Make
583 copies while it is still usable.
585 JH/17 Logging: when the deliver_time selector ise set, include the DT= field
586 on delivery deferred (==) and failed (**) lines (if a delivery was
587 attemtped). Previously it was only on completion (=>) lines.
589 JH/18 Authentication: the gsasl driver not provides the $authN variables in time
590 for the expansion of the server_scram_iter and server_scram_salt options.
592 WB/01 SPF: DNS lookups for the obsolete SPF RR type done by the libspf2 library
593 are now specifically given a NO_DATA response without hitting the system
594 resolver. The library goes on to do the now-standard TXT lookup.
595 Use of dnsdb lookups is not affected.
597 JH/19 Bug 2507: Modules: on handling a dynamic-module (lookups) open failure,
598 only retrieve the errormessage once. Previously two calls to dlerror()
599 were used, and the second one (for mainlog/paniclog) retrieved null
602 JH/20 Taint checking: disallow use of tainted data for
603 - the appendfile transport file and directory options
604 - the pipe transport command
605 - the autoreply transport file, log and once options
606 - file names used by the redirect router (including filter files)
608 - paths used by single-key lookups
609 Previously this was permitted.
611 JH/21 Bug 2501: Fix init call in the heimdal authenticator. Previously it
612 adjusted the size of a major service buffer; this failed because the
613 buffer was in use at the time. Change to a compile-time increase in the
614 buffer size, when this authenticator is compiled into exim.
616 JH/22 Taint-checking: move to safe-mode taint checking on all platforms. The
617 previous fast-mode was untenable in the face of glibs using mmap to
618 support larger malloc requests.
620 PP/01 Update the openssl_options possible values through OpenSSL 1.1.1c.
621 New values supported, if defined on system where compiled:
622 allow_no_dhe_kex, cryptopro_tlsext_bug, enable_middlebox_compat,
623 no_anti_replay, no_encrypt_then_mac, prioritize_chacha, tlsext_padding
625 JH/23 Performance improvement in the initial phase of a two-pass queue run. By
626 running a limited number of proceses in parallel, a benefit is gained. The
627 amount varies with the platform hardware and load. The use of the option
628 queue_run_in_order means we cannot do this, as ordering becomes
631 JH/24 Bug 2524: fix the cyrus_sasl auth driver gssapi usage. A previous fix
632 had introduced a string-copy (for ensuring NUL-termination) which was not
633 appropriate for that case, which can include embedded NUL bytes in the
634 block of data. Investigation showed the copy to actually be needless, the
635 data being length-specified.
637 JH/25 Fix use of concurrent TLS connections under GnuTLS. When a callout was
638 done during a receiving connection, and both used TLS, global info was
639 used rather than per-connection info for tracking the state of data
640 queued for transmission. This could result in a connection hang.
642 JH/26 Fix use of the SIZE parameter on MAIL commands, on continued connections.
643 Previously, when delivering serveral messages down a single connection
644 only the first would provide a SIZE. This was due to the size information
645 not being properly tracked.
647 JH/27 Bug 2530: When operating in a timezone with sub-minute offset, such as
648 TAI (at 37 seconds currently), pretend to be in UTC for time-related
649 expansion and logging. Previously, spurious values such as a future
650 minute could be seen.
652 JH/28 Bug 2533: Fix expansion of ${tr } item. When called in some situations
653 it could crash from a null-deref. This could also affect the
654 ${addresses: } operator and ${readsock } item.
656 JH/29 Bug 2537: Fix $mime_part_count. When a single connection had a non-mime
657 message following a mime one, the variable was not reset.
659 JH/30 When an pipelined-connect fails at the first response, assume incorrect
660 cached capability (perhaps the peer reneged?) and immediately retry in
663 JH/31 Fix spurious detection of timeout while writing to transport filter.
665 JH/32 Bug 2541: Fix segfault on bad cmdline -f (sender) argument. Previously
666 an attempt to copy the string was made before checking it.
668 JH/33 Fix the dsearch lookup to return an untainted result. Previously the
669 taint of the lookup key was maintained; we now regard the presence in the
670 filesystem as sufficient validation.
672 JH/34 Fix the readsocket expansion to not segfault when an empty "options"
673 argument is supplied.
675 JH/35 The dsearch lookup now requires that the directory is an absolute path.
676 Previously this was not checked, and nonempty relative paths made an
677 access under Exim's current working directory.
679 JH/36 Bug 2554: Fix msg:defer event for the hosts_max_try_hardlimit case.
680 Previously no event was raised.
682 JH/37 Bug 2552: Fix the check on spool space during reception to use the SIZE
683 parameter supplied by the sender MAIL FROM command. Previously it was
684 ignored, and only the check_spool_space option value for the required
687 JH/38 Fix $dkim_key_length. This should, after a DKIM verification, present
688 the size of the signing public-key. Previously it was instead giving
689 the size of the signature hash.
691 JH/39 DKIM verification: the RFC 8301 restriction on sizes of RSA keys is now
692 the default. See the (new) dkim_verify_min_keysizes option.
694 JH/40 Fix a memory-handling bug: when a connection carried multiple messages
695 and an ACL use a lookup for checking either the local_part or domain,
696 stale data could be accessed. Ensure that variable references are
697 dropped between messages.
699 JH/41 Bug 2571: Fix SPA authenticator. Running as a server, an offset supplied
700 by the client was not checked as pointing within response data before
701 being used. A malicious client could thus cause an out-of-bounds read and
702 possibly gain authentication. Fix by adding the check.
704 JH/42 Internationalisation: change the default for downconversion in the smtp
705 transport to be "if needed". Previously it was "as previously set" for
706 the message, which usually meant "if needed" for message-submission but
707 "no" for everything else. However, MTAs have been seen using SMTPUTF8
708 even when the envelope addresses did not need it, resulting in forwarding
709 failures to non-supporting MTAs. A downconvert in such cases will be
710 a no-op on the addresses, merely dropping the use of SMTPUTF8 by the
711 transport. The change does mean that addresses needing conversion will
712 be converted when previously a delivery failure would occur.
714 JH/43 Fix possible long line in DSN. Previously when a very long SMTP error
715 response was received it would be used unchecked in a fail-DSN, violating
716 standards on line-length limits. Truncate if needed.
718 HS/01 Remove parameters of the link to www.open-spf.org. The linked form
719 doesn't work. (Additionally add a new main config option to configure the
726 JH/01 OpenSSL: With debug enabled output keying information sufficient, server
727 side, to decode a TLS 1.3 packet capture.
729 JH/02 OpenSSL: Suppress the sending of (stateful) TLS1.3 session tickets.
730 Previously the default library behaviour applied, sending two, each in
733 JH/03 Debug output for ACL now gives the config file name and line number for
736 JH/04 The default received_header_text now uses the RFC 8314 tls cipher clause.
738 JH/05 DKIM: ensure that dkim_domain elements are lowercased before use.
740 JH/06 Fix buggy handling of autoreply bounce_return_size_limit, and a possible
741 buffer overrun for (non-chunking) other transports.
743 JH/07 GnuTLS: Our use of late (post-handshake) certificate verification, under
744 TLS1.3, means that a server rejecting a client certificate is not visible
745 to the client until the first read of encrypted data (typically the
746 response to EHLO). Add detection for that case and treat it as a failed
747 TLS connection attempt, so that the normal retry-in-clear can work (if
748 suitably configured).
750 JB/01 Bug 2375: fix expansions of 822 addresses having comments in local-part
751 and/or domain. Found and fixed by Jason Betts.
753 JH/08 Add hardening against SRV & TLSA lookups the hit CNAMEs (a nonvalid
754 configuration). If a CNAME target was not a wellformed name pattern, a
757 JH/09 Logging: Fix initial listening-on line for multiple ports for an IP when
758 the OS reports them interleaved with other addresses.
760 JH/10 OpenSSL: Fix aggregation of messages. Previously, when PIPELINING was
761 used both for input and for a verify callout, both encrypted, SMTP
762 responses being sent by the server could be lost. This resulted in
763 dropped connections and sometimes bounces generated by a peer sending
766 JH/11 Harden plaintext authenticator against a badly misconfigured client-send
767 string. Previously it was possible to cause undefined behaviour in a
768 library routine (usually a crash). Found by "zerons".
770 JH/12 Bug 2384: fix "-bP smtp_receive_timeout". Previously it returned no
773 JH/13 Bug 2386: Fix builds with Dane under LibreSSL 2.9.0 onward. Some old
774 API was removed, so update to use the newer ones.
776 JH/14 Bug 1891: Close the log file if receiving a non-smtp message, without
777 any timeout set, is taking a long time. Previously we would hang on to a
778 rotated logfile "forever" if the input was arriving with long gaps
779 (a previous attempt to fix addressed lack, for a long time, of initial
782 HS/01 Bug 2390: Use message_id for tempfile creation to avoid races in a
783 shared (NFS) environment. The length of the tempfile name is now
784 4 + 16 ("hdr.$message_exim_id") which might break on file
785 systems which restrict the file name length to lower values.
788 HS/02 Bug 2390: Use message_id for tempfile creation to avoid races in a
789 shared (NFS) environment.
791 HS/03 Bug 2392: exigrep does case sensitive *option* processing (as it
792 did for all versions <4.90). Notably -M, -m, --invert, -I may be
795 JH/15 Use unsigned when creating bitmasks in macros, to avoid build errors
796 on some platforms for bit 31.
798 JH/16 GnuTLS: rework ciphersuite strings under recent library versions. Thanks
799 to changes apparently associated with TLS1.3 handling some of the APIs
800 previously used were either nonfunctional or inappropriate. Strings
801 like TLS1.3:ECDHE_SECP256R1__RSA_PSS_RSAE_SHA256__AES_256_GCM__AEAD:256
802 and TLS1.2:ECDHE_SECP256R1__RSA_SHA256__AES_128_CBC__SHA256:128 replace
803 the previous TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256 .
804 This affects log line X= elements, the $tls_{in,out}_cipher variables,
805 and the use of specific cipher names in the encrypted= ACL condition.
807 JH/17 OpenSSL: the default openssl_options now disables ssl_v3.
809 JH/18 GnuTLS: fix $tls_out_ocsp under hosts_request_ocsp. Previously the
810 verification result was not updated unless hosts_require_ocsp applied.
812 JH/19 Bug 2398: fix listing of a named-queue. Previously, even with the option
813 queue_list_requires_admin set to false, non-admin users were denied the
816 JH/20 Bug 2389: fix server advertising of usable certificates, under GnuTLS in
817 directory-of-certs mode. Previously they were advertised despite the
820 JH/21 The smtp transport option "hosts_noproxy_tls" is now unset by default.
821 A single TCP connection by a client will now hold a TLS connection open
822 for multiple message deliveries, by default. Previously the default was to
825 JH/22 The smtp transport option "hosts_try_dane" now enables all hosts by
826 default. If built with the facility, DANE will be used. The facility
827 SUPPORT_DANE is now enabled in the prototype build Makefile "EDITME".
829 JH/23 The build default is now for TLS to be included; the SUPPORT_TLS define
830 is replaced with DISABLE_TLS. Either USE_GNUTLS or (the new) USE_OPENSSL
831 must be defined and you must still, unless you define DISABLE_TLS, manage
832 the the include-dir and library-file requirements that go with that
833 choice. Non-TLS builds are still supported.
835 JH/24 Fix duplicated logging of peer name/address, on a transport connection-
838 JH/25 The smtp transport option "hosts_try_fastopen" now enables all hosts by
839 default. If the platform supports and has the facility enabled, it will
840 be requested on all coneections.
842 JH/26 The PIPE_CONNECT facility is promoted from experimental status and is now
843 controlled by the build-time option SUPPORT_PIPE_CONNECT.
845 PP/01 Unbreak heimdal_gssapi, broken in 4.92.
847 JH/27 Bug 2404: Use the main-section configuration option "dsn_from" for
848 success-DSN messages. Previously the From: header was always the default
849 one for these; the option was ignored.
851 JH/28 Fix the timeout on smtp response to apply to the whole response.
852 Previously it was reset for every read, so a teergrubing peer sending
853 single bytes within the time limit could extend the connection for a
854 long time. Credit to Qualsys Security Advisory Team for the discovery.
856 JH/29 Fix DSN Final-Recipient: field. Previously it was the post-routing
857 delivery address, which leaked information of the results of local
858 forwarding. Change to the original envelope recipient address, per
861 JH/30 Bug 2411: Fix DSN generation when RFC 3461 failure notification is
862 requested. Previously not bounce was generated and a log entry of
863 error ignored was made.
865 JH/31 Avoid re-expansion in ${sort } expansion. (CVE-2019-13917)
867 JH/32 Introduce a general tainting mechanism for values read from the input
868 channel, and values derived from them. Refuse to expand any tainted
869 values, to catch one form of exploit.
871 JH/33 Bug 2413: Fix dkim_strict option. Previously the expansion result
872 was unused and the unexpanded text used for the test. Found and
873 fixed by Ruben Jenster.
875 JH/34 Fix crash after TLS shutdown. When the TCP/SMTP channel was left open,
876 an attempt to use a TLS library read routine dereffed a nul pointer,
879 JH/35 Bug 2409: filter out-of-spec chars from callout response before using
880 them in our smtp response.
882 JH/36 Have the general router option retry_use_local_part default to true when
883 any of the restrictive preconditions are set (to anything). Previously it
884 was only for check_local user. The change removes one item of manual
885 configuration which is required for proper retries when a remote router
886 handles a subset of addresses for a domain.
888 JH/37 Appendfile: when evaluating quota use (non-quota_size_regex) take the file
889 link count into consideration.
891 HS/04 Fix handling of very log lines in -H files. If a -<key> <value> line
892 caused the extension of big_buffer, the following lines were ignored.
894 JH/38 Bug 1395: Teach the DNS negative-cache about TTL value from the SOA in
895 accordance with RFC 2308. Previously there was no expiry, so a longlived
896 receive process (eg. due to ACL delays) versus a short SOA value could
899 HS/05 Handle trailing backslash gracefully. (CVE-2019-15846)
901 JH/39 Promote DMARC support to mainline.
903 JH/40 Bug 2452: Add a References: header to DSNs.
905 JH/41 With GnuTLS 3.6.0 (and later) do not attempt to manage Diffie-Hellman
906 parameters. The relevant library call is documented as "Deprecated: This
907 function is unnecessary and discouraged on GnuTLS 3.6.0 or later. Since
908 3.6.0, DH parameters are negotiated following RFC7919."
910 HS/06 Change the default of dnssec_request_domains to "*"
912 JH/42 Bug 2545: Fix CHUNKING for all RCPT commands rejected. Previously we
913 carried on and emitted a BDAT command, even when PIPELINING was not
916 JH/43 Bug 2465: Fix taint-handling in dsearch lookup. Previously a nontainted
917 buffer was used for the filename, resulting in a trap when tainted
918 arguments (eg. $domain) were used.
920 JH/44 With OpenSSL 1.1.1 (onwards) disable renegotiation for TLS1.2 and below;
921 recommended to avoid a possible server-load attack. The feature can be
922 re-enabled via the openssl_options main cofiguration option.
924 JH/45 local_scan API: documented the current smtp_printf() call. This changed
925 for version 4.90 - adding a "more data" boolean to the arguments.
926 Bumped the ABI version number also, this having been missed previously;
927 release versions 4.90 to 4.92.3 inclusive were effectively broken in
928 respect of usage of smtp_printf() by either local_scan code or libraries
929 accessed via the ${dlfunc } expansion item. Both will need coding
930 adjustment for any calls to smtp_printf() to match the new function
931 signature; a FALSE value for the new argument is always safe.
933 JH/46 FreeBSD: fix use of the sendfile() syscall. The shim was not updating
934 the file-offset (which the Linux syscall does, and exim expects); this
935 resulted in an indefinite loop.
937 JH/47 ARC: fix crash in signing, triggered when a configuration error failed
938 to do ARC verification. The Authentication-Results: header line added
939 by the configuration then had no ARC item.
941 JH/48 Bug 2784: fix shutdown=no in the ${readsocket) expansion item. Previously
942 an incorrect mode was used for reading the result, resulting in it being
949 JH/01 Remove code calling the customisable local_scan function, unless a new
950 definition "HAVE_LOCAL_SCAN=yes" is present in the Local/Makefile.
952 JH/02 Bug 1007: Avoid doing logging from signal-handlers, as that can result in
953 non-signal-safe functions being used.
955 JH/03 Bug 2269: When presented with a received message having a stupidly large
956 number of DKIM-Signature headers, disable DKIM verification to avoid
957 a resource-consumption attack. The limit is set at twenty.
959 JH/04 Add variables $arc_domains, $arc_oldest_pass for ARC verify. Fix the
960 report of oldest_pass in ${authres } in consequence, and separate out
961 some descriptions of reasons for verification fail.
963 JH/05 Bug 2273: Cutthrough delivery left a window where the received messsage
964 files in the spool were present and unlocked. A queue-runner could spot
965 them, resulting in a duplicate delivery. Fix that by doing the unlock
966 after the unlink. Investigation by Tim Stewart. Take the opportunity to
967 add more error-checking on spoolfile handling while that code is being
970 PP/01 Refuse to open a spool data file (*-D) if it's a symlink.
971 No known attacks, no CVE, this is defensive hardening.
973 JH/06 Bug 2275: The MIME ACL unlocked the received message files early, and
974 a queue-runner could start a delivery while other operations were ongoing.
975 Cutthrough delivery was a common victim, resulting in duplicate delivery.
976 Found and investigated by Tim Stewart. Fix by using the open message data
977 file handle rather than opening another, and not locally closing it (which
978 releases a lock) for that case, while creating the temporary .eml format
979 file for the MIME ACL. Also applies to "regex" and "spam" ACL conditions.
981 JH/07 Bug 177: Make a random-recipient callout success visible in ACL, by setting
982 $sender_verify_failure/$recipient_verify_failure to "random".
984 JH/08 When generating a selfsigned cert, use serial number 1 since zero is not
987 JH/09 Bug 2274: Fix logging of cmdline args when starting in an unlinked cwd.
988 Previously this would segfault.
990 JH/10 Fix ARC signing for case when DKIM signing failed. Previously this would
993 JH/11 Bug 2264: Exim now only follows CNAME chains one step by default. We'd
994 like zero, since the resolver should be doing this for us, But we need one
995 as a CNAME but no MX presence gets the CNAME returned; we need to check
996 that doesn't point to an MX to declare it "no MX returned" rather than
997 "error, loop". A new main option is added so the older capability of
998 following some limited number of chain links is maintained.
1000 JH/12 Add client-ip info to non-pass iprev ${authres } lines.
1002 JH/13 For receent Openssl versions (1.1 onward) use modern generic protocol
1003 methods. These should support TLS 1.3; they arrived with TLS 1.3 and the
1004 now-deprecated earlier definitions used only specified the range up to TLS
1005 1.2 (in the older-version library docs).
1007 JH/14 Bug 2284: Fix DKIM signing for body lines starting with a pair of dots.
1009 JH/15 Rework TLS client-side context management. Stop using a global, and
1010 explicitly pass a context around. This enables future use of TLS for
1011 connections to service-daemons (eg. malware scanning) while a client smtp
1012 connection is using TLS; with cutthrough connections this is quite likely.
1014 JH/16 Fix ARC verification to do AS checks in reverse order.
1016 JH/17 Support a "tls" option on the ${readsocket } expansion item.
1018 JH/18 Bug 2287: Fix the protocol name (eg utf8esmtp) for multiple messages
1019 using the SMTPUTF8 option on their MAIL FROM commands, in one connection.
1020 Previously the "utf8" would be re-prepended for every additional message.
1022 JH/19 Reject MAIL FROM commands with SMTPUTF8 when the facility was not advertised.
1023 Previously thery were accepted, resulting in issues when attempting to
1024 forward messages to a non-supporting MTA.
1026 PP/02 Let -n work with printing macros too, not just options.
1028 JH/20 Bug 2296: Fix cutthrough for >1 address redirection. Previously only
1029 one parent address was copied, and bogus data was used at delivery-logging
1030 time. Either a crash (after delivery) or bogus log data could result.
1031 Discovery and analysis by Tim Stewart.
1033 PP/03 Make ${utf8clean:} expansion operator detect incomplete final character.
1034 Previously if the string ended mid-character, we did not insert the
1035 promised '?' replacement.
1037 PP/04 Documentation: current string operators work on bytes, not codepoints.
1039 JH/21 Change as many as possible of the global flags into one-bit bitfields; these
1040 should pack well giving a smaller memory footprint so better caching and
1041 therefore performance. Group the declarations where this can't be done so
1042 that the byte-sized flag variables are not interspersed among pointer
1043 variables, giving a better chance of good packing by the compiler.
1045 JH/22 Bug 1896: Fix the envelope from for DMARC forensic reports to be possibly
1046 non-null, to avoid issues with sites running BATV. Previously reports were
1047 sent with an empty envelope sender so looked like bounces.
1049 JH/23 Bug 2318: Fix the noerror command within filters. It wasn't working.
1050 The ignore_error flag wasn't being returned from the filter subprocess so
1051 was not set for later routers. Investigation and fix by Matthias Kurz.
1053 JH/24 Bug 2310: Raise a msg:fail:internal event for each undelivered recipient,
1054 and a msg:complete for the whole, when a message is manually removed using
1055 -Mrm. Developement by Matthias Kurz, hacked on by JH.
1057 JH/25 Avoid fixed-size buffers for pathnames in DB access. This required using
1058 a "Gnu special" function, asprintf() in the DB utility binary builds; I
1059 hope that is portable enough.
1061 JH/26 Bug 2311: Fix DANE-TA verification under GnuTLS. Previously it was also
1062 requiring a known-CA anchor certificate; make it now rely entirely on the
1063 TLSA as an anchor. Checking the name on the leaf cert against the name
1064 on the A-record for the host is still done for TA (but not for EE mode).
1066 JH/27 Fix logging of proxy address. Previously, a pointless "PRX=[]:0" would be
1067 included in delivery lines for non-proxied connections, when compiled with
1068 SUPPORT_SOCKS and running with proxy logging enabled.
1070 JH/28 Bug 2314: Fire msg:fail:delivery event even when error is being ignored.
1071 Developement by Matthias Kurz, tweaked by JH. While in that bit of code,
1072 move the existing event to fire before the normal logging of message
1073 failure so that custom logging is bracketed by normal logging.
1075 JH/29 Bug 2322: A "fail" command in a non-system filter (file) now fires the
1076 msg:fail:internal event. Developement by Matthias Kurz.
1078 JH/30 Bug 2329: Increase buffer size used for dns lookup from 2k, which was
1079 far too small for todays use of crypto signatures stored there. Go all
1080 the way to the max DNS message size of 64kB, even though this might be
1081 overmuch for IOT constrained device use.
1083 JH/31 Fix a bad use of a copy function, which could be used to pointlessly
1084 copy a string over itself. The library routine is documented as not
1085 supporting overlapping copies, and on MacOS it actually raised a SIGABRT.
1087 JH/32 For main options check_spool_space and check_inode_space, where the
1088 platform supports 64b integers, support more than the previous 2^31 kB
1089 (i.e. more than 2 TB). Accept E, P and T multipliers in addition to
1090 the previous G, M, k.
1092 JH/33 Bug 2338: Fix the cyrus-sasl authenticator to fill in the
1093 $authenticated_fail_id variable on authentication failure. Previously
1096 JH/34 Increase RSA keysize of autogen selfsign cert from 1024 to 2048. RHEL 8.0
1097 OpenSSL didn't want to use such a weak key. Do for GnuTLS also, and for
1098 more-modern GnuTLS move from GNUTLS_SEC_PARAM_LOW to
1099 GNUTLS_SEC_PARAM_MEDIUM.
1101 JH/35 OpenSSL: fail the handshake when SNI processing hits a problem, server
1102 side. Previously we would continue as if no SNI had been received.
1104 JH/36 Harden the handling of string-lists. When a list consisted of a sole
1105 "<" character, which should be a list-separator specification, we walked
1106 off past the nul-terimation.
1108 JH/37 Bug 2341: Send "message delayed" warning MDNs (restricted to external
1109 causes) even when the retry time is not yet met. Previously they were
1110 not, meaning that when (say) an account was over-quota and temp-rejecting,
1111 and multiple senders' messages were queued, only one sender would get
1112 notified on each configured delay_warning cycle.
1114 JH/38 Bug 2351: Log failures to extract envelope addresses from message headers.
1116 JH/39 OpenSSL: clear the error stack after an SSL_accept(). With anon-auth
1117 cipher-suites, an error can be left on the stack even for a succeeding
1118 accept; this results in impossible error messages when a later operation
1121 AM/01 Bug 2359: GnuTLS: repeat lowlevel read and write operations while they
1122 return error codes indicating retry. Under TLS1.3 this becomes required.
1124 JH/40 Fix the feature-cache refresh for EXPERIMENTAL_PIPE_CONNECT. Previously
1125 it only wrote the new authenticators, resulting in a lack of tracking of
1126 peer changes of ESMTP extensions until the next cache flush.
1128 JH/41 Fix the loop reading a message header line to check for integer overflow,
1129 and more-often against header_maxsize. Previously a crafted message could
1130 induce a crash of the recive process; now the message is cleanly rejected.
1132 JH/42 Bug 2366: Fix the behaviour of the dkim_verify_signers option. It had
1133 been totally disabled for all of 4.91. Discovery and fix by "Mad Alex".
1139 GF/01 DEFER rather than ERROR on redis cluster MOVED response.
1140 When redis_servers is set to a list of > 1 element, and the Redis servers
1141 in that list are in cluster configuration, convert the REDIS_REPLY_ERROR
1142 case of MOVED into a DEFER case instead, thus moving the query onto the
1143 next server in the list. For a cluster of N elements, all N servers must
1144 be defined in redis_servers.
1146 GF/02 Catch and remove uninitialized value warning in exiqsumm
1147 Check for existence of @ARGV before looking at $ARGV[0]
1149 JH/01 Replace the store_release() internal interface with store_newblock(),
1150 which internalises the check required to safely use the old one, plus
1151 the allocate and data copy operations duplicated in both (!) of the
1152 extant use locations.
1154 JH/02 Disallow '/' characters in queue names specified for the "queue=" ACL
1155 modifier. This matches the restriction on the commandline.
1157 JH/03 Fix pgsql lookup for multiple result-tuples with a single column.
1158 Previously only the last row was returned.
1160 JH/04 Bug 2217: Tighten up the parsing of DKIM signature headers. Previously
1161 we assumed that tags in the header were well-formed, and parsed the
1162 element content after inspecting only the first char of the tag.
1163 Assumptions at that stage could crash the receive process on malformed
1166 JH/05 Bug 2215: Fix crash associated with dnsdb lookup done from DKIM ACL.
1167 While running the DKIM ACL we operate on the Permanent memory pool so that
1168 variables created with "set" persist to the DATA ACL. Also (at any time)
1169 DNS lookups that fail create cache records using the Permanent pool. But
1170 expansions release any allocations made on the current pool - so a dnsdb
1171 lookup expansion done in the DKIM ACL releases the memory used for the
1172 DNS negative-cache, and bad things result. Solution is to switch to the
1173 Main pool for expansions.
1174 While we're in that code, add checks on the DNS cache during store_reset,
1175 active in the testsuite.
1176 Problem spotted, and debugging aided, by Wolfgang Breyha.
1178 JH/06 Fix issue with continued-connections when the DNS shifts unreliably.
1179 When none of the hosts presented to a transport match an already-open
1180 connection, close it and proceed with the list. Previously we would
1181 queue the message. Spotted by Lena with Yahoo, probably involving
1184 JH/07 Bug 2214: Fix SMTP responses resulting from non-accept result of MIME ACL.
1185 Previously a spurious "250 OK id=" response was appended to the proper
1188 JH/08 The "support for" informational output now, which built with Content
1189 Scanning support, has a line for the malware scanner interfaces compiled
1190 in. Interface can be individually included or not at build time.
1192 JH/09 The "aveserver", "kavdaemon" and "mksd" interfaces are now not included
1193 by the template makefile "src/EDITME". The "STREAM" support for an older
1194 ClamAV interface method is removed.
1196 JH/10 Bug 2223: Fix mysql lookup returns for the no-data case (when the number of
1197 rows affected is given instead).
1199 JH/11 The runtime Berkeley DB library version is now additionally output by
1200 "exim -d -bV". Previously only the compile-time version was shown.
1202 JH/12 Bug 2230: Fix cutthrough routing for nonfirst messages in an initiating
1203 SMTP connection. Previously, when one had more recipients than the
1204 first, an abortive onward connection was made. Move to full support for
1205 multiple onward connections in sequence, handling cutthrough connection
1206 for all multi-message initiating connections.
1208 JH/13 Bug 2229: Fix cutthrough routing for nonstandard port numbers defined by
1209 routers. Previously, a multi-recipient message would fail to match the
1210 onward-connection opened for the first recipient, and cause its closure.
1212 JH/14 Bug 2174: A timeout on connect for a callout was also erroneously seen as
1213 a timeout on read on a GnuTLS initiating connection, resulting in the
1214 initiating connection being dropped. This mattered most when the callout
1215 was marked defer_ok. Fix to keep the two timeout-detection methods
1218 JH/15 Relax results from ACL control request to enable cutthrough, in
1219 unsupported situations, from error to silently (except under debug)
1220 ignoring. This covers use with PRDR, frozen messages, queue-only and
1223 HS/01 Fix Buffer overflow in base64d() (CVE-2018-6789)
1225 JH/16 Fix bug in DKIM verify: a buffer overflow could corrupt the malloc
1226 metadata, resulting in a crash in free().
1228 PP/01 Fix broken Heimdal GSSAPI authenticator integration.
1229 Broken in f2ed27cf5, missing an equals sign for specified-initialisers.
1230 Broken also in d185889f4, with init system revamp.
1232 JH/17 Bug 2113: Fix conversation closedown with the Avast malware scanner.
1233 Previously we abruptly closed the connection after reading a malware-
1234 found indication; now we go on to read the "scan ok" response line,
1237 JH/18 Bug 2239: Enforce non-usability of control=utf8_downconvert in the mail
1238 ACL. Previously, a crash would result.
1240 JH/19 Speed up macro lookups during configuration file read, by skipping non-
1241 macro text after a replacement (previously it was only once per line) and
1242 by skipping builtin macros when searching for an uppercase lead character.
1244 JH/20 DANE support moved from Experimental to mainline. The Makefile control
1245 for the build is renamed.
1247 JH/21 Fix memory leak during multi-message connections using STARTTLS. A buffer
1248 was allocated for every new TLS startup, meaning one per message. Fix
1249 by only allocating once (OpenSSL) or freeing on TLS-close (GnuTLS).
1251 JH/22 Bug 2236: When a DKIM verification result is overridden by ACL, DMARC
1252 reported the original. Fix to report (as far as possible) the ACL
1253 result replacing the original.
1255 JH/23 Fix memory leak during multi-message connections using STARTTLS under
1256 OpenSSL. Certificate information is loaded for every new TLS startup,
1257 and the resources needed to be freed.
1259 JH/24 Bug 2242: Fix exim_dbmbuild to permit directoryless filenames.
1261 JH/25 Fix utf8_downconvert propagation through a redirect router. Previously it
1264 JH/26 Bug 2253: For logging delivery lines under PRDR, append the overall
1265 DATA response info to the (existing) per-recipient response info for
1266 the "C=" log element. It can have useful tracking info from the
1267 destination system. Patch from Simon Arlott.
1269 JH/27 Bug 2251: Fix ldap lookups that return a single attribute having zero-
1270 length value. Previously this would segfault.
1272 HS/02 Support Avast multiline protoocol, this allows passing flags to
1273 newer versions of the scanner.
1275 JH/28 Ensure that variables possibly set during message acceptance are marked
1276 dead before release of memory in the daemon loop. This stops complaints
1277 about them when the debug_store option is enabled. Discovered specifically
1278 for sender_rate_period, but applies to a whole set of variables.
1279 Do the same for the queue-runner and queue-list loops, for variables set
1280 from spool message files. Do the same for the SMTP per-message loop, for
1281 certain variables indirectly set in ACL operations.
1283 JH/29 Bug 2250: Fix a longstanding bug in heavily-pipelined SMTP input (such
1284 as a multi-recipient message from a mailinglist manager). The coding had
1285 an arbitrary cutoff number of characters while checking for more input;
1286 enforced by writing a NUL into the buffer. This corrupted long / fast
1287 input. The problem was exposed more widely when more pipelineing of SMTP
1288 responses was introduced, and one Exim system was feeding another.
1289 The symptom is log complaints of SMTP syntax error (NUL chars) on the
1290 receiving system, and refused recipients seen by the sending system
1291 (propating to people being dropped from mailing lists).
1292 Discovered and pinpointed by David Carter.
1294 JH/30 The (EXPERIMENTAL_DMARC) variable $dmarc_ar_header is withdrawn, being
1295 replaced by the ${authresults } expansion.
1297 JH/31 Bug 2257: Fix pipe transport to not use a socket-only syscall.
1299 HS/03 Set a handler for SIGTERM and call exit(3) if running as PID 1. This
1300 allows proper process termination in container environments.
1302 JH/32 Bug 2258: Fix spool_wireformat in combination with LMTP transport.
1303 Previously the "final dot" had a newline after it; ensure it is CR,LF.
1305 JH/33 SPF: remove support for the "spf" ACL condition outcome values "err_temp"
1306 and "err_perm", deprecated since 4.83 when the RFC-defined words
1307 "temperror" and "permerror" were introduced.
1309 JH/34 Re-introduce enforcement of no cutthrough delivery on transports having
1310 transport-filters or DKIM-signing. The restriction was lost in the
1311 consolidation of verify-callout and delivery SMTP handling.
1312 Extend the restriction to also cover ARC-signing.
1314 JH/35 Cutthrough: for a final-dot response timeout (and nonunderstood responses)
1315 in defer=pass mode supply a 450 to the initiator. Previously the message
1318 PP/02 DANE: add dane_require_tls_ciphers SMTP Transport option; if unset,
1319 tls_require_ciphers is used as before.
1321 HS/03 Malware Avast: Better match the Avast multiline protocol. Add
1322 "pass_unscanned". Only tmpfails from the scanner are written to
1323 the paniclog, as they may require admin intervention (permission
1324 denied, license issues). Other scanner errors (like decompression
1325 bombs) do not cause a paniclog entry.
1327 JH/36 Fix reinitialisation of DKIM logging variable between messages.
1328 Previously it was possible to log spurious information in receive log
1331 JH/37 Bug 2255: Revert the disable of the OpenSSL session caching. This
1332 triggered odd behaviour from Outlook Express clients.
1334 PP/03 Add util/renew-opendmarc-tlds.sh script for safe renewal of public
1337 JH/38 DKIM: accept Ed25519 pubkeys in SubjectPublicKeyInfo-wrapped form,
1338 since the IETF WG has not yet settled on that versus the original
1339 "bare" representation.
1341 JH/39 Fix syslog logging for syslog_timestamp=no and log_selector +millisec.
1342 Previously the millisecond value corrupted the output.
1343 Fix also for syslog_pid=no and log_selector +pid, for which the pid
1344 corrupted the output.
1350 JH/01 Rework error string handling in TLS interface so that the caller in
1351 more cases is responsible for logging. This permits library-sourced
1352 string to be attached to addresses during delivery, and collapses
1353 pairs of long lines into single ones.
1355 PP/01 Allow PKG_CONFIG_PATH to be set in Local/Makefile and use it correctly
1356 during configuration. Wildcards are allowed and expanded.
1358 JH/02 Rework error string handling in DKIM to pass more info back to callers.
1359 This permits better logging.
1361 JH/03 Rework the transport continued-connection mechanism: when TLS is active,
1362 do not close it down and have the child transport start it up again on
1363 the passed-on TCP connection. Instead, proxy the child (and any
1364 subsequent ones) for TLS via a unix-domain socket channel. Logging is
1365 affected: the continued delivery log lines do not have any DNSSEC, TLS
1366 Certificate or OCSP information. TLS cipher information is still logged.
1368 JH/04 Shorten the log line for daemon startup by collapsing adjacent sets of
1369 identical IP addresses on different listening ports. Will also affect
1372 PP/02 Bug 2070: uClibc defines __GLIBC__ without providing glibc headers;
1373 add noisy ifdef guards to special-case this sillyness.
1374 Patch from Bernd Kuhls.
1376 JH/05 Tighten up the checking in isip4 (et al): dotted-quad components larger
1377 than 255 are no longer allowed.
1379 JH/06 Default openssl_options to include +no_ticket, to reduce load on peers.
1380 Disable the session-cache too, which might reduce our load. Since we
1381 currrectly use a new context for every connection, both as server and
1382 client, there is no benefit for these.
1383 GnuTLS appears to not support tickets server-side by default (we don't
1384 call gnutls_session_ticket_enable_server()) but client side is enabled
1385 by default on recent versions (3.1.3 +) unless the PFS priority string
1388 PP/03 Add $SOURCE_DATE_EPOCH support for reproducible builds, per spec at
1389 <https://reproducible-builds.org/specs/source-date-epoch/>.
1391 JH/07 Fix smtp transport use of limited max_rcpt under mua_wrapper. Previously
1392 the check for any unsuccessful recipients did not notice the limit, and
1393 erroneously found still-pending ones.
1395 JH/08 Pipeline CHUNKING command and data together, on kernels that support
1396 MSG_MORE. Only in-clear (not on TLS connections).
1398 JH/09 Avoid using a temporary file during transport using dkim. Unless a
1399 transport-filter is involved we can buffer the headers in memory for
1400 creating the signature, and read the spool data file once for the
1401 signature and again for transmission.
1403 JH/10 Enable use of sendfile in Linux builds as default. It was disabled in
1404 4.77 as the kernel support then wasn't solid, having issues in 64bit
1405 mode. Now, it's been long enough. Add support for FreeBSD also.
1407 JH/11 Bug 2104: Fix continued use of a transport connection with TLS. In the
1408 case where the routing stage had gathered several addresses to send to
1409 a host before calling the transport for the first, we previously failed
1410 to close down TLS in the old transport process before passing the TCP
1411 connection to the new process. The new one sent a STARTTLS command
1412 which naturally failed, giving a failed delivery and bloating the retry
1413 database. Investigation and fix prototype from Wolfgang Breyha.
1415 JH/12 Fix check on SMTP command input synchronisation. Previously there were
1416 false-negatives in the check that the sender had not preempted a response
1417 or prompt from Exim (running as a server), due to that code's lack of
1418 awareness of the SMTP input buffering.
1420 PP/04 Add commandline_checks_require_admin option.
1421 Exim drops privileges sanely, various checks such as -be aren't a
1422 security problem, as long as you trust local users with access to their
1423 own account. When invoked by services which pass untrusted data to
1424 Exim, this might be an issue. Set this option in main configuration
1425 AND make fixes to the calling application, such as using `--` to stop
1428 JH/13 Do pipelining under TLS. Previously, although safe, no advantage was
1429 taken. Now take care to pack both (client) MAIL,RCPT,DATA, and (server)
1430 responses to those, into a single TLS record each way (this usually means
1431 a single packet). As a side issue, smtp_enforce_sync now works on TLS
1434 PP/05 OpenSSL/1.1: use DH_bits() for more accurate DH param sizes. This
1435 affects you only if you're dancing at the edge of the param size limits.
1436 If you are, and this message makes sense to you, then: raise the
1437 configured limit or use OpenSSL 1.1. Nothing we can do for older
1440 JH/14 For the "sock" variant of the malware scanner interface, accept an empty
1441 cmdline element to get the documented default one. Previously it was
1444 JH/15 Fix a crash in the smtp transport caused when two hosts in succession
1445 are unsuable for non-message-specific reasons - eg. connection timeout,
1446 banner-time rejection.
1448 JH/16 Fix logging of delivery remote port, when specified by router, under
1451 PP/06 Repair manualroute's ability to take options in any order, even if one
1452 is the name of a transport.
1455 HS/01 Cleanup, prevent repeated use of -p/-oMr (CVE-2017-1000369)
1457 JH/17 Change the list-building routines interface to use the expanding-string
1458 triplet model, for better allocation and copying behaviour.
1460 JH/18 Prebuild the data-structure for "builtin" macros, for faster startup.
1461 Previously it was constructed the first time a possibly-matching string
1462 was met in the configuration file input during startup; now it is done
1465 JH/19 Bug 2141: Use the full-complex API for Berkeley DB rather than the legacy-
1466 compatible one, to avoid the (poorly documented) possibility of a config
1467 file in the working directory redirecting the DB files, possibly correpting
1468 some existing file. CVE-2017-10140 assigned for BDB.
1470 JH/20 Bug 2147: Do not defer for a verify-with-callout-and-random which is not
1471 cache-hot. Previously, although the result was properly cached, the
1472 initial verify call returned a defer.
1474 JH/21 Bug 2151: Avoid using SIZE on the MAIL for a callout verify, on any but
1475 the main verify for receipient in uncached-mode.
1477 JH/22 Retire historical build files to an "unsupported" subdir. These are
1478 defined as "ones for which we have no current evidence of testing".
1480 JH/23 DKIM: enforce the DNS pubkey record "h" permitted-hashes optional field,
1481 if present. Previously it was ignored.
1483 JH/24 Start using specified-initialisers in C structure init coding. This is
1484 a C99 feature (it's 2017, so now considered safe).
1486 JH/25 Use one-bit bitfields for flags in the "addr" data structure. Previously
1487 if was a fixed-sized field and bitmask ops via macros; it is now more
1490 PP/07 GitHub PR 56: Apply MariaDB build fix.
1491 Patch provided by Jaroslav Škarvada.
1493 PP/08 Bug 2161: Fix regression in sieve quoted-printable handling introduced
1494 during Coverity cleanups [4.87 JH/47]
1495 Diagnosis and fix provided by Michael Fischer v. Mollard.
1497 JH/26 Fix DKIM bug: when the pseudoheader generated for signing was exactly
1498 the right size to place the terminating semicolon on its own folded
1499 line, the header hash was calculated to an incorrect value thanks to
1500 the (relaxed) space the fold became.
1502 HS/02 Fix Bug 2130: large writes from the transport subprocess were chunked
1503 and confused the parent.
1505 JH/27 Fix SOCKS bug: an unitialized pointer was deref'd by the transport process
1506 which could crash as a result. This could lead to undeliverable messages.
1508 JH/28 Logging: "next input sent too soon" now shows where input was truncated
1511 JH/29 Fix queue_run_in_order to ignore the PID portion of the message ID. This
1512 matters on fast-turnover and PID-randomising systems, which were getting
1513 out-of-order delivery.
1515 JH/30 Fix a logging bug on aarch64: an unsafe routine was previously used for
1516 a possibly-overlapping copy. The symptom was that "Remote host closed
1517 connection in response to HELO" was logged instead of the actual 4xx
1520 JH/31 Fix CHUNKING code to properly flush the unwanted chunk after an error.
1521 Previously only that bufferd was discarded, resulting in SYMTP command
1524 JH/32 DKIM: when a message has multiple signatures matching an identity given
1525 in dkim_verify_signers, run the dkim acl once for each. Previously only
1526 one run was done. Bug 2189.
1528 JH/33 Downgrade an unfound-list name (usually a typo in the config file) from
1529 "panic the current process" to "deliberately defer". The panic log is
1530 still written with the problem list name; the mail and reject logs now
1531 get a temp-reject line for the message that was being handled, saying
1532 something like "domains check lookup or other defer". The SMTP 451
1533 message is still "Temporary local problem".
1535 JH/34 Bug 2199: Fix a use-after-free while reading smtp input for header lines.
1536 A crafted sequence of BDAT commands could result in in-use memory beeing
1537 freed. CVE-2017-16943.
1539 HS/03 Bug 2201: Fix checking for leading-dot on a line during headers reading
1540 from SMTP input. Previously it was always done; now only done for DATA
1541 and not BDAT commands. CVE-2017-16944.
1543 JH/35 Bug 2201: Flush received data in BDAT mode after detecting an error fatal
1544 to the message (such as an overlong header line). Previously this was
1545 not done and we did not exit BDAT mode. Followon from the previous item
1546 though a different problem.
1552 JH/01 Bug 1922: Support IDNA2008. This has slightly different conversion rules
1553 than -2003 did; needs libidn2 in addition to libidn.
1555 JH/02 The path option on a pipe transport is now expanded before use.
1557 PP/01 GitHub PR 50: Do not call ldap_start_tls_s on ldapi:// connections.
1558 Patch provided by "Björn", documentation fix added too.
1560 JH/03 Bug 2003: fix Proxy Protocol v2 handling: the address size field was
1561 missing a wire-to-host endian conversion.
1563 JH/04 Bug 2004: fix CHUNKING in non-PIPELINEING mode. Chunk data following
1564 close after a BDAT command line could be taken as a following command,
1565 giving a synch failure. Fix by only checking for synch immediately
1566 before acknowledging the chunk.
1568 PP/02 GitHub PR 52: many spelling fixes, which include fixing parsing of
1569 no_require_dnssec option and creation of _HAVE_TRANSPORT_APPEND_MAILDIR
1570 macro. Patches provided by Josh Soref.
1572 JH/05 Have the EHLO response advertise VRFY, if there is a vrfy ACL defined.
1573 Previously we did not; the RFC seems ambiguous and VRFY is not listed
1574 by IANA as a service extension. However, John Klensin suggests that we
1577 JH/06 Bug 2017: Fix DKIM verification in -bh test mode. The data feed into
1578 the dkim code may be unix-mode line endings rather than smtp wire-format
1579 CRLF, so prepend a CR to any bare LF.
1581 JH/07 Rationalise the coding for callout smtp conversations and transport ones.
1582 As a side-benfit, callouts can now use PIPELINING hence fewer round-trips.
1584 JH/08 Bug 2016: Fix DKIM verification vs. CHUNKING. Any BDAT commands after
1585 the first were themselves being wrongly included in the feed into dkim
1586 processing; with most chunk sizes in use this resulted in an incorrect
1587 body hash calculated value.
1589 JH/09 Bug 2014: permit inclusion of a DKIM-Signature header in a received
1590 DKIM signature block, for verification. Although advised against by
1591 standards it is specifically not ruled illegal.
1593 JH/10 Bug 2025: Fix reception of (quoted) local-parts with embedded spaces.
1595 JH/11 Bug 2029: Fix crash in DKIM verification when a message signature block is
1596 missing a body hash (the bh= tag).
1598 JH/12 Bug 2018: Re-order Proxy Protocol startup versus TLS-on-connect startup.
1599 It seems that HAProxy sends the Proxy Protocol information in clear and
1600 only then does a TLS startup, so do the same.
1602 JH/13 Bug 2027: Avoid attempting to use TCP Fast Open for non-transport client
1603 TCP connections (such as for Spamd) unless the daemon successfully set
1604 Fast Open mode on its listening sockets. This fixes breakage seen on
1605 too-old kernels or those not configured for Fast Open, at the cost of
1606 requiring both directions being enabled for TFO, and TFO never being used
1607 by non-daemon-related Exim processes.
1609 JH/14 Bug 2000: Reject messages recieved with CHUNKING but with malformed line
1610 endings, at least on the first header line. Try to canonify any that get
1611 past that check, despite the cost.
1613 JH/15 Angle-bracket nesting (an error inserted by broken sendmails) levels are
1614 now limited to an arbitrary five deep, while parsing addresses with the
1615 strip_excess_angle_brackets option enabled.
1617 PP/03 Bug 2018: For Proxy Protocol and TLS-on-connect, do not over-read and
1618 instead leave the unprompted TLS handshake in socket buffer for the
1619 TLS library to consume.
1621 PP/04 Bug 2018: Also handle Proxy Protocol v2 safely.
1623 PP/05 FreeBSD compat: handle that Ports no longer create /usr/bin/perl
1625 JH/16 Drop variables when they go out of scope. Memory management drops a whole
1626 region in one operation, for speed, and this leaves assigned pointers
1627 dangling. Add checks run only under the testsuite which checks all
1628 variables at a store-reset and panics on a dangling pointer; add code
1629 explicitly nulling out all the variables discovered. Fixes one known
1630 bug: a transport crash, where a dangling pointer for $sending_ip_address
1631 originally assigned in a verify callout, is re-used.
1633 PP/06 Drop '.' from @INC in various Perl scripts.
1635 PP/07 Switch FreeBSD iconv to always use the base-system libc functions.
1637 PP/08 Reduce a number of compilation warnings under clang; building with
1638 CC=clang CFLAGS+=-Wno-dangling-else -Wno-logical-op-parentheses
1639 should be warning-free.
1641 JH/17 Fix inbound CHUNKING when DKIM disabled at runtime.
1643 HS/01 Fix portability problems introduced by PP/08 for platforms where
1644 realloc(NULL) is not equivalent to malloc() [SunOS et al].
1646 HS/02 Bug 1974: Fix missing line terminator on the last received BDAT
1647 chunk. This allows us to accept broken chunked messages. We need a more
1648 general solution here.
1650 PP/09 Wrote util/chunking_fixqueue_finalnewlines.pl to help recover
1651 already-broken messages in the queue.
1653 JH/18 Bug 2061: Fix ${extract } corrupting an enclosing ${reduce } $value.
1655 JH/19 Fix reference counting bug in routing-generated-address tracking.
1661 JH/01 Use SIZE on MAIL FROM in a cutthrough connection, if the destination
1662 supports it and a size is available (ie. the sending peer gave us one).
1664 JH/02 The obsolete acl condition "demime" is removed (finally, after ten
1665 years of being deprecated). The replacements are the ACLs
1666 acl_smtp_mime and acl_not_smtp_mime.
1668 JH/03 Upgrade security requirements imposed for hosts_try_dane: previously
1669 a downgraded non-dane trust-anchor for the TLS connection (CA-style)
1670 or even an in-clear connection were permitted. Now, if the host lookup
1671 was dnssec and dane was requested then the host is only used if the
1672 TLSA lookup succeeds and is dnssec. Further hosts (eg. lower priority
1673 MXs) will be tried (for hosts_try_dane though not for hosts_require_dane)
1674 if one fails this test.
1675 This means that a poorly-configured remote DNS will make it incommunicado;
1676 but it protects against a DNS-interception attack on it.
1678 JH/04 Bug 1810: make continued-use of an open smtp transport connection
1679 non-noisy when a race steals the message being considered.
1681 JH/05 If main configuration option tls_certificate is unset, generate a
1682 self-signed certificate for inbound TLS connections.
1684 JH/06 Bug 165: hide more cases of password exposure - this time in expansions
1685 in rewrites and routers.
1687 JH/07 Retire gnutls_require_mac et.al. These were nonfunctional since 4.80
1688 and logged a warning sing 4.83; now they are a configuration file error.
1690 JH/08 Bug 1836: Fix crash in VRFY handling when handed an unqualified name
1691 (lacking @domain). Apply the same qualification processing as RCPT.
1693 JH/09 Bug 1804: Avoid writing msglog files when in -bh or -bhc mode.
1695 JH/10 Support ${sha256:} applied to a string (as well as the previous
1698 JH/11 Cutthrough: avoid using the callout hints db on a verify callout when
1699 a cutthrough deliver is pending, as we always want to make a connection.
1700 This also avoids re-routing the message when later placing the cutthrough
1701 connection after a verify cache hit.
1702 Do not update it with the verify result either.
1704 JH/12 Cutthrough: disable when verify option success_on_redirect is used, and
1705 when routing results in more than one destination address.
1707 JH/13 Cutthrough: expand transport dkim_domain option when testing for dkim
1708 signing (which inhibits the cutthrough capability). Previously only
1709 the presence of an option was tested; now an expansion evaluating as
1710 empty is permissible (obviously it should depend only on data available
1711 when the cutthrough connection is made).
1713 JH/14 Fix logging of errors under PIPELINING. Previously the log line giving
1714 the relevant preceding SMTP command did not note the pipelining mode.
1716 JH/15 Fix counting of empty lines in $body_linecount and $message_linecount.
1717 Previously they were not counted.
1719 JH/16 DANE: treat a TLSA lookup response having all non-TLSA RRs, the same
1720 as one having no matching records. Previously we deferred the message
1721 that needed the lookup.
1723 JH/17 Fakereject: previously logged as a normal message arrival "<="; now
1724 distinguished as "(=".
1726 JH/18 Bug 1867: make the fail_defer_domains option on a dnslookup router work
1727 for missing MX records. Previously it only worked for missing A records.
1729 JH/19 Bug 1850: support Radius libraries that return REJECT_RC.
1731 JH/20 Bug 1872: Ensure that acl_smtp_notquit is run when the connection drops
1732 after the data-go-ahead and data-ack. Patch from Jason Betts.
1734 JH/21 Bug 1846: Send DMARC forensic reports for reject and quarantine results,
1735 even for a "none" policy. Patch from Tony Meyer.
1737 JH/22 Fix continued use of a connection for further deliveries. If a port was
1738 specified by a router, it must also match for the delivery to be
1741 JH/23 Bug 1874: fix continued use of a connection for further deliveries.
1742 When one of the recipients of a message was unsuitable for the connection
1743 (has no matching addresses), we lost track of needing to mark it
1744 deferred. As a result mail would be lost.
1746 JH/24 Bug 1832: Log EHLO response on getting conn-close response for HELO.
1748 JH/25 Decoding ACL controls is now done using a binary search; the source code
1749 takes up less space and should be simpler to maintain. Merge the ACL
1750 condition decode tables also, with similar effect.
1752 JH/26 Fix problem with one_time used on a redirect router which returned the
1753 parent address unchanged. A retry would see the parent address marked as
1754 delivered, so not attempt the (identical) child. As a result mail would
1757 JH/27 Fix a possible security hole, wherein a process operating with the Exim
1758 UID can gain a root shell. Credit to http://www.halfdog.net/ for
1759 discovery and writeup. Ubuntu bug 1580454; no bug raised against Exim
1762 JH/28 Enable {spool,log} filesystem space and inode checks as default.
1763 Main config options check_{log,spool}_{inodes,space} are now
1764 100 inodes, 10MB unless set otherwise in the configuration.
1766 JH/29 Fix the connection_reject log selector to apply to the connect ACL.
1767 Previously it only applied to the main-section connection policy
1770 JH/30 Bug 1897: fix callouts connection fallback from TLS to cleartext.
1772 PP/01 Changed default Diffie-Hellman parameters to be Exim-specific, created
1773 by me. Added RFC7919 DH primes as an alternative.
1775 PP/02 Unbreak build via pkg-config with new hash support when crypto headers
1776 are not in the system include path.
1778 JH/31 Fix longstanding bug with aborted TLS server connection handling. Under
1779 GnuTLS, when a session startup failed (eg because the client disconnected)
1780 Exim did stdio operations after fclose. This was exposed by a recent
1781 change which nulled out the file handle after the fclose.
1783 JH/32 Bug 1909: Fix OCSP proof verification for cases where the proof is
1784 signed directly by the cert-signing cert, rather than an intermediate
1785 OCSP-signing cert. This is the model used by LetsEncrypt.
1787 JH/33 Bug 1914: Ensure socket is nonblocking before draining after SMTP QUIT.
1789 HS/01 Fix leak in verify callout under GnuTLS, about 3MB per recipient on
1790 an incoming connection.
1792 HS/02 Bug 1802: Do not half-close the connection after sending a request
1795 HS/03 Use "auto" as the default EC curve parameter. For OpenSSL < 1.0.2
1796 fallback to "prime256v1".
1798 JH/34 SECURITY: Use proper copy of DATA command in error message.
1799 Could leak key material. Remotely exploitable. CVE-2016-9963.
1805 JH/01 Bug 1664: Disable OCSP for GnuTLS library versions at/before 3.3.16
1806 and 3.4.4 - once the server is enabled to respond to an OCSP request
1807 it does even when not requested, resulting in a stapling non-aware
1808 client dropping the TLS connection.
1810 TF/01 Code cleanup: Overhaul the debug_selector and log_selector machinery to
1811 support variable-length bit vectors. No functional change.
1813 TF/02 Improve the consistency of logging incoming and outgoing interfaces.
1814 The I= interface field on outgoing lines is now after the H= remote
1815 host field, same as incoming lines. There is a separate
1816 outgoing_interface log selector which allows you to disable the
1819 JH/02 Bug 728: Close logfiles after a daemon-process "exceptional" log write.
1820 If not running log_selector +smtp_connection the mainlog would be held
1821 open indefinitely after a "too many connections" event, including to a
1822 deleted file after a log rotate. Leave the per net connection logging
1823 leaving it open for efficiency as that will be quickly detected by the
1824 check on the next write.
1826 HS/01 Bug 1671: Fix post transport crash.
1827 Processing the wait-<transport> messages could crash the delivery
1828 process if the message IDs didn't exist for some reason. When
1829 using 'split_spool_directory=yes' the construction of the spool
1830 file name failed already, exposing the same netto behaviour.
1832 JH/03 Bug 425: Capture substrings in $regex1, $regex2 etc from regex &
1833 mime_regex ACL conditions.
1835 JH/04 Bug 1686: When compiled with EXPERIMENTAL_DSN_INFO: Add extra information
1836 to DSN fail messages (bounces): remote IP, remote greeting, remote response
1837 to HELO, local diagnostic string.
1839 JH/05 Downgrade message for a TLS-certificate-based authentication fail from
1840 log line to debug. Even when configured with a tls authenticator many
1841 client connections are expected to not authenticate in this way, so
1842 an authenticate fail is not an error.
1844 HS/02 Add the Exim version string to the process info. This way exiwhat
1845 gives some more detail about the running daemon.
1847 JH/06 Bug 1395: time-limit caching of DNS lookups, to the TTL value. This may
1848 matter for fast-change records such as DNSBLs.
1850 JH/07 Bug 1678: Always record an interface option value, if set, as part of a
1851 retry record, even if constant. There may be multiple transports with
1852 different interface settings and the retry behaviour needs to be kept
1855 JH/08 Bug 1586: exiqgrep now refuses to run if there are unexpected arguments.
1857 JH/09 Bug 1700: ignore space & tab embedded in base64 during decode.
1859 JH/10 Bug 840: fix log_defer_output option of pipe transport
1861 JH/11 Bug 830: use same host for all RCPTS of a message, even under
1862 hosts_randomize. This matters a lot when combined with mua_wrapper.
1864 JH/12 Bug 1706: percent and underbar characters are no longer escaped by the
1865 ${quote_pgsql:<string>} operator.
1867 JH/13 Bug 1708: avoid misaligned access in cached lookup.
1869 JH/14 Change header file name for freeradius-client. Relevant if compiling
1870 with Radius support; from the Gentoo tree and checked under Fedora.
1872 JH/15 Bug 1712: Introduce $prdr_requested flag variable
1874 JH/16 Bug 1714: Permit an empty string as expansion result for transport
1875 option transport_filter, meaning no filtering.
1877 JH/17 Bug 1713: Fix non-PDKIM_DEBUG build. Patch from Jasen Betts.
1879 JH/18 Bug 1709: When built with TLS support, the tls_advertise_hosts option now
1880 defaults to "*" (all hosts). The variable is now available when not built
1881 with TLS, default unset, mainly to enable keeping the testsuite sane.
1882 If a server certificate is not supplied (via tls_certificate) an error is
1883 logged, and clients will find TLS connections fail on startup. Presumably
1884 they will retry in-clear.
1885 Packagers of Exim are strongly encouraged to create a server certificate
1886 at installation time.
1888 HS/03 Add -bP config_file as a synonym for -bP configure_file, for consistency
1889 with the $config_file variable.
1891 JH/19 Two additional event types: msg:rcpt:defer and msg:rcpt:host:defer. Both
1892 in transport context, after the attempt, and per-recipient. The latter type
1893 is per host attempted. The event data is the error message, and the errno
1894 information encodes the lookup type (A vs. MX) used for the (first) host,
1895 and the trailing two digits of the smtp 4xx response.
1897 GF/01 Bug 1715: Fix for race condition in exicyclog, where exim could attempt
1898 to write to mainlog (or rejectlog, paniclog) in the window between file
1899 creation and permissions/ownership being changed. Particularly affects
1900 installations where exicyclog is run as root, rather than exim user;
1901 result is that the running daemon panics and dies.
1903 JH/20 Bug 1701: For MySQL lookups, support MySQL config file option group names.
1905 JH/21 Bug 1720: Add support for priority groups and weighted-random proxy
1906 selection for the EXPERIMENTAL_SOCKS feature, via new per-proxy options
1907 "pri" and "weight". Note that the previous implicit priority given by the
1908 list order is no longer honoured.
1910 JH/22 Bugs 963, 1721: Fix some corner cases in message body canonicalization
1911 for DKIM processing.
1913 JH/23 Move SOCKS5 support from Experimental to mainline, enabled for a build
1914 by defining SUPPORT_SOCKS.
1916 JH/26 Move PROXY support from Experimental to mainline, enabled for a build
1917 by defining SUPPORT_PROXY. Note that the proxy_required_hosts option
1918 is renamed to hosts_proxy, and the proxy_{host,target}_{address,port}.
1919 variables are renamed to proxy_{local,external}_{address,port}.
1921 JH/27 Move Internationalisation support from Experimental to mainline, enabled
1922 for a build by defining SUPPORT_I18N
1924 JH/28 Bug 1745: Fix redis lookups to handle (quoted) spaces embedded in parts
1925 of the query string, and make ${quote_redis:} do that quoting.
1927 JH/29 Move Events support from Experimental to mainline, enabled by default
1928 and removable for a build by defining DISABLE_EVENT.
1930 JH/30 Updated DANE implementation code to current from Viktor Dukhovni.
1932 JH/31 Fix bug with hosts_connection_nolog and named-lists which were wrongly
1933 cached by the daemon.
1935 JH/32 Move Redis support from Experimental to mainline, enabled for a build
1936 by defining LOOKUP_REDIS. The libhiredis library is required.
1938 JH/33 Bug 1748: Permit ACL dnslists= condition in non-smtp ACLs if explicit
1939 keys are given for lookup.
1941 JH/34 Bug 1192: replace the embedded copy of PolarSSL RSA routines in the DKIM
1942 support, by using OpenSSL or GnuTLS library ones. This means DKIM is
1943 only supported when built with TLS support. The PolarSSL SHA routines
1944 are still used when the TLS library is too old for convenient support.
1946 JH/35 Require SINGLE_DH_USE by default in OpenSSL (main config option
1947 openssl_options), for security. OpenSSL forces this from version 1.1.0
1948 server-side so match that on older versions.
1950 JH/36 Bug 1778: longstanding bug in memory use by the ${run } expansion: A fresh
1951 allocation for $value could be released as the expansion processing
1952 concluded, but leaving the global pointer active for it.
1954 JH/37 Bug 1769: Permit a VRFY ACL to override the default 252 response,
1955 and to use the domains and local_parts ACL conditions.
1957 JH/38 Fix cutthrough bug with body lines having a single dot. The dot was
1958 incorrectly not doubled on cutthrough transmission, hence seen as a
1959 body-termination at the receiving system - resulting in truncated mails.
1960 Commonly the sender saw a TCP-level error, and retransmitted the message
1961 via the normal store-and-forward channel. This could result in duplicates
1962 received - but deduplicating mailstores were liable to retain only the
1963 initial truncated version.
1965 JH/39 Bug 1781: Fix use of DKIM private-keys having trailing '=' in the base-64.
1967 JH/40 Fix crash in queryprogram router when compiled with EXPERIMENTAL_SRS.
1969 JH/41 Bug 1792: Fix selection of headers to sign for DKIM: bottom-up. While
1970 we're in there, support oversigning also; bug 1309.
1972 JH/42 Bug 1796: Fix error logged on a malware scanner connection failure.
1974 HS/04 Add support for keep_environment and add_environment options.
1976 JH/43 Tidy coding issues detected by gcc --fsanitize=undefined. Some remain;
1977 either intentional arithmetic overflow during PRNG, or testing config-
1980 JH/44 Bug 1800: The combination of a -bhc commandline option and cutthrough
1981 delivery resulted in actual delivery. Cancel cutthrough before DATA
1984 JH/45 Fix cutthrough, when connection not opened by verify and target hard-
1985 rejects a recipient: pass the reject to the originator.
1987 JH/46 Multiple issues raised by Coverity. Some were obvious or plausible bugs.
1988 Many were false-positives and ignorable, but it's worth fixing the
1991 JH/47 Fix build on HP-UX and older Solaris, which need (un)setenv now also
1992 for the new environment-manipulation done at startup. Move the routines
1993 from being local to tls.c to being global via the os.c file.
1995 JH/48 Bug 1807: Fix ${extract } for the numeric/3-string case. While preparsing
1996 an extract embedded as result-arg for a map, the first arg for extract
1997 is unavailable so we cannot tell if this is a numbered or keyed
1998 extraction. Accept either.
2004 JH/01 Bug 1545: The smtp transport option "retry_include_ip_address" is now
2007 JH/02 The smtp transport option "multi_domain" is now expanded.
2009 JH/03 The smtp transport now requests PRDR by default, if the server offers
2012 JH/04 Certificate name checking on server certificates, when exim is a client,
2013 is now done by default. The transport option tls_verify_cert_hostnames
2014 can be used to disable this per-host. The build option
2015 EXPERIMENTAL_CERTNAMES is withdrawn.
2017 JH/05 The value of the tls_verify_certificates smtp transport and main options
2018 default to the word "system" to access the system default CA bundle.
2019 For GnuTLS, only version 3.0.20 or later.
2021 JH/06 Verification of the server certificate for a TLS connection is now tried
2022 (but not required) by default. The verification status is now logged by
2023 default, for both outbound TLS and client-certificate supplying inbound
2026 JH/07 Changed the default rfc1413 lookup settings to disable calls. Few
2029 JH/08 The EXPERIMENTAL_DSN compile option is no longer needed; all Delivery
2030 Status Notification (bounce) messages are now MIME format per RFC 3464.
2031 Support for RFC 3461 DSN options NOTIFY,ENVID,RET,ORCPT can be advertised
2032 under the control of the dsn_advertise_hosts option, and routers may
2033 have a dsn_lasthop option.
2035 JH/09 A timeout of 2 minutes is now applied to all malware scanner types by
2036 default, modifiable by a malware= option. The list separator for
2037 the options can now be changed in the usual way. Bug 68.
2039 JH/10 The smtp_receive_timeout main option is now expanded before use.
2041 JH/11 The incoming_interface log option now also enables logging of the
2042 local interface on delivery outgoing connections.
2044 JH/12 The cutthrough-routing facility now supports multi-recipient mails,
2045 if the interface and destination host and port all match.
2047 JH/13 Bug 344: The verify = reverse_host_lookup ACL condition now accepts a
2050 JH/14 Bug 1573: The spam= ACL condition now additionally supports Rspamd.
2051 Patch from Andrew Lewis.
2053 JH/15 Bug 670: The spamd_address main option (for the spam= ACL condition)
2054 now supports optional time-restrictions, weighting, and priority
2055 modifiers per server. Patch originally by <rommer@active.by>.
2057 JH/16 The spamd_address main option now supports a mixed list of local
2058 and remote servers. Remote servers can be IPv6 addresses, and
2059 specify a port-range.
2061 JH/17 Bug 68: The spamd_address main option now supports an optional
2062 timeout value per server.
2064 JH/18 Bug 1581: Router and transport options headers_add/remove can
2065 now have the list separator specified.
2067 JH/19 Bug 392: spamd_address, and clamd av_scanner, now support retry
2070 JH/20 Bug 1571: Ensure that $tls_in_peerdn is set, when verification fails
2073 JH/21 Support for the A6 type of dns record is withdrawn.
2075 JH/22 Bug 608: The result of a QUIT or not-QUIT toplevel ACL now matters
2076 rather than the verbs used.
2078 JH/23 Bug 1572: Increase limit on SMTP confirmation message copy size
2079 from 255 to 1024 chars.
2081 JH/24 Verification callouts now attempt to use TLS by default.
2083 HS/01 DNSSEC options (dnssec_require_domains, dnssec_request_domains)
2084 are generic router options now. The defaults didn't change.
2086 JH/25 Bug 466: Add RFC2322 support for MIME attachment filenames.
2087 Original patch from Alexander Shikoff, worked over by JH.
2089 HS/02 Bug 1575: exigrep falls back to autodetection of compressed
2090 files if ZCAT_COMMAND is not executable.
2092 JH/26 Bug 1539: Add timeout/retry options on dnsdb lookups.
2094 JH/27 Bug 286: Support SOA lookup in dnsdb lookups.
2096 JH/28 Bug 1588: Do not use the A lookup following an AAAA for setting the FQDN.
2097 Normally benign, it bites when the pair was led to by a CNAME;
2098 modern usage is to not canonicalize the domain to a CNAME target
2099 (and we were inconsistent anyway for A-only vs AAAA+A).
2101 JH/29 Bug 1632: Removed the word "rejected" from line logged for ACL discards.
2103 JH/30 Check the forward DNS lookup for DNSSEC, in addition to the reverse,
2104 when evaluating $sender_host_dnssec.
2106 JH/31 Check the HELO verification lookup for DNSSEC, adding new
2107 $sender_helo_dnssec variable.
2109 JH/32 Bug 1397: Enable ECDHE on OpenSSL, just the NIST P-256 curve.
2111 JH/33 Bug 1346: Note MAIL cmd seen in -bS batch, to avoid smtp_no_mail log.
2113 JH/34 Bug 1648: Fix a memory leak seen with "mailq" and large queues.
2115 JH/35 Bug 1642: Fix support of $spam_ variables at delivery time. Was
2116 documented as working, but never had. Support all but $spam_report.
2118 JH/36 Bug 1659: Guard checking of input smtp commands again pseudo-command
2119 added for tls authenticator.
2121 HS/03 Add perl_taintmode main config option
2127 TL/01 When running the test suite, the README says that variables such as
2128 no_msglog_check are global and can be placed anywhere in a specific
2129 test's script, however it was observed that placement needed to be near
2130 the beginning for it to behave that way. Changed the runtest perl
2131 script to read through the entire script once to detect and set these
2132 variables, reset to the beginning of the script, and then run through
2133 the script parsing/test process like normal.
2135 TL/02 The BSD's have an arc4random API. One of the functions to induce
2136 adding randomness was arc4random_stir(), but it has been removed in
2137 OpenBSD 5.5. Detect this OpenBSD version and skip calling this
2138 function when detected.
2140 JH/01 Expand the EXPERIMENTAL_TPDA feature. Several different events now
2141 cause callback expansion.
2143 TL/03 Bugzilla 1518: Clarify "condition" processing in routers; that
2144 syntax errors in an expansion can be treated as a string instead of
2145 logging or causing an error, due to the internal use of bool_lax
2146 instead of bool when processing it.
2148 JH/02 Add EXPERIMENTAL_DANE, allowing for using the DNS as trust-anchor for
2149 server certificates when making smtp deliveries.
2151 JH/03 Support secondary-separator specifier for MX, SRV, TLSA lookups.
2153 JH/04 Add ${sort {list}{condition}{extractor}} expansion item.
2155 TL/04 Bugzilla 1216: Add -M (related messages) option to exigrep.
2157 TL/05 GitHub Issue 18: Adjust logic testing for true/false in redis lookups.
2158 Merged patch from Sebastian Wiedenroth.
2160 JH/05 Fix results-pipe from transport process. Several recipients, combined
2161 with certificate use, exposed issues where response data items split
2162 over buffer boundaries were not parsed properly. This eventually
2163 resulted in duplicates being sent. This issue only became common enough
2164 to notice due to the introduction of connection certificate information,
2165 the item size being so much larger. Found and fixed by Wolfgang Breyha.
2167 JH/06 Bug 1533: Fix truncation of items in headers_remove lists. A fixed
2168 size buffer was used, resulting in syntax errors when an expansion
2171 JH/07 Add support for directories of certificates when compiled with a GnuTLS
2172 version 3.3.6 or later.
2174 JH/08 Rename the TPDA experimental facility to Event Actions. The #ifdef
2175 is EXPERIMENTAL_EVENT, the main-configuration and transport options
2176 both become "event_action", the variables become $event_name, $event_data
2177 and $event_defer_errno. There is a new variable $verify_mode, usable in
2178 routers, transports and related events. The tls:cert event is now also
2179 raised for inbound connections, if the main configuration event_action
2182 TL/06 In test suite, disable OCSP for old versions of openssl which contained
2183 early OCSP support, but no stapling (appears to be less than 1.0.0).
2185 JH/09 When compiled with OpenSSL and EXPERIMENTAL_CERTNAMES, the checks on
2186 server certificate names available under the smtp transport option
2187 "tls_verify_cert_hostname" now do not permit multi-component wildcard
2190 JH/10 Time-related extraction expansions from certificates now use the main
2191 option "timezone" setting for output formatting, and are consistent
2192 between OpenSSL and GnuTLS compilations. Bug 1541.
2194 JH/11 Fix a crash in mime ACL when meeting a zero-length, quoted or RFC2047-
2195 encoded parameter in the incoming message. Bug 1558.
2197 JH/12 Bug 1527: Autogrow buffer used in reading spool files. Since they now
2198 include certificate info, eximon was claiming there were spoolfile
2201 JH/13 Bug 1521: Fix ldap lookup for single-attr request, multiple-attr return.
2203 JH/14 Log delivery-related information more consistently, using the sequence
2204 "H=<name> [<ip>]" wherever possible.
2206 TL/07 Bug 1547: Omit RFCs from release. Draft and RFCs have licenses which
2207 are problematic for Debian distribution, omit them from the release
2210 JH/15 Updates and fixes to the EXPERIMENTAL_DSN feature.
2212 JH/16 Fix string representation of time values on 64bit time_t architectures.
2215 JH/17 Fix a null-indirection in certextract expansions when a nondefault
2216 output list separator was used.
2221 TL/01 Bugzilla 1506: Re-add a 'return NULL' to silence complaints from static
2222 checkers that were complaining about end of non-void function with no
2225 JH/01 Bug 1513: Fix parsing of quoted parameter values in MIME headers.
2226 This was a regression introduced in 4.83 by another bugfix.
2228 JH/02 Fix broken compilation when EXPERIMENTAL_DSN is enabled.
2230 TL/02 Bug 1509: Fix exipick for enhanced spoolfile specification used when
2231 EXPERIMENTAL_DSN is enabled. Fix from Wolfgang Breyha.
2237 TF/01 Correctly close the server side of TLS when forking for delivery.
2239 When a message was received over SMTP with TLS, Exim failed to clear up
2240 the incoming connection properly after forking off the child process to
2241 deliver the message. In some situations the subsequent outgoing
2242 delivery connection happened to have the same fd number as the incoming
2243 connection previously had. Exim would try to use TLS and fail, logging
2244 a "Bad file descriptor" error.
2246 TF/02 Portability fix for building lookup modules on Solaris when the xpg4
2247 utilities have not been installed.
2249 JH/01 Fix memory-handling in use of acl as a conditional; avoid free of
2250 temporary space as the ACL may create new global variables.
2252 TL/01 LDAP support uses per connection or global context settings, depending
2253 upon the detected version of the libraries at build time.
2255 TL/02 Experimental Proxy Protocol support: allows a proxied SMTP connection
2256 to extract and use the src ip:port in logging and expansions as if it
2257 were a direct connection from the outside internet. PPv2 support was
2258 updated based on HAProxy spec change in May 2014.
2260 JH/02 Add ${listextract {number}{list}{success}{fail}}.
2262 TL/03 Bugzilla 1433: Fix DMARC SEGV with specific From header contents.
2263 Properly escape header and check for NULL return.
2265 PP/01 Continue incomplete 4.82 PP/19 by fixing docs too: use dns_dnssec_ok
2268 JH/03 Bugzilla 1157: support log_selector smtp_confirmation for lmtp.
2270 TL/04 Add verify = header_names_ascii check to reject email with non-ASCII
2271 characters in header names, implemented as a verify condition.
2272 Contributed by Michael Fischer v. Mollard.
2274 TL/05 Rename SPF condition results err_perm and err_temp to standardized
2275 results permerror and temperror. Previous values are deprecated but
2276 still accepted. In a future release, err_perm and err_temp will be
2277 completely removed, which will be a backward incompatibility if the
2278 ACL tests for either of these two old results. Patch contributed by
2279 user bes-internal on the mailing list.
2281 JH/04 Add ${utf8clean:} operator. Contributed by Alex Rau.
2283 JH/05 Bugzilla 305: Log incoming-TLS details on rejects, subject to log
2284 selectors, in both main and reject logs.
2286 JH/06 Log outbound-TLS and port details, subject to log selectors, for a
2289 JH/07 Add malware type "sock" for talking to simple daemon.
2291 JH/08 Bugzilla 1371: Add tls_{,try_}verify_hosts to smtp transport.
2293 JH/09 Bugzilla 1431: Support (with limitations) headers_add/headers_remove in
2294 routers/transports under cutthrough routing.
2296 JH/10 Bugzilla 1005: ACL "condition =" should accept values which are negative
2297 numbers. Touch up "bool" conditional to keep the same definition.
2299 TL/06 Remove duplicated language in spec file from 4.82 TL/16.
2301 JH/11 Add dnsdb tlsa lookup. From Todd Lyons.
2303 JH/12 Expand items in router/transport headers_add or headers_remove lists
2304 individually rather than the list as a whole. Bug 1452.
2306 Required for reasonable handling of multiple headers_ options when
2307 they may be empty; requires that headers_remove items with embedded
2308 colons must have them doubled (or the list-separator changed).
2310 TL/07 Add new dmarc expansion variable $dmarc_domain_policy to directly
2311 view the policy declared in the DMARC record. Currently, $dmarc_status
2312 is a combined value of both the record presence and the result of the
2315 JH/13 Fix handling of $tls_cipher et.al. in (non-verify) transport. Bug 1455.
2317 JH/14 New options dnssec_request_domains, dnssec_require_domains on the
2318 dnslookup router and the smtp transport (applying to the forward
2321 TL/08 Bugzilla 1453: New LDAP "SERVERS=" option allows admin to override list
2322 of ldap servers used for a specific lookup. Patch provided by Heiko
2325 JH/18 New options dnssec_lax, dnssec_strict on dnsdb lookups.
2326 New variable $lookup_dnssec_authenticated for observability.
2328 TL/09 Bugzilla 609: Add -C option to exiqgrep, specify which exim.conf to use.
2329 Patch submitted by Lars Timman.
2331 JH/19 EXPERIMENTAL_OCSP support under GnuTLS. Bug 1459.
2333 TL/10 Bugzilla 1454: New -oMm option to pass message reference to Exim.
2334 Requires trusted mode and valid format message id, aborts otherwise.
2335 Patch contributed by Heiko Schlichting.
2337 JH/20 New expansion variables tls_(in,out)_(our,peer)cert, and expansion item
2338 certextract with support for various fields. Bug 1358.
2340 JH/21 Observability of OCSP via variables tls_(in,out)_ocsp. Stapling
2341 is requested by default, modifiable by smtp transport option
2344 JH/22 Expansion operators ${md5:string} and ${sha1:string} can now
2345 operate on certificate variables to give certificate fingerprints
2346 Also new ${sha256:cert_variable}.
2348 JH/23 The PRDR feature is moved from being Experimental into the mainline.
2350 TL/11 Bug 1119: fix memory allocation in string_printing2(). Patch from
2351 Christian Aistleitner.
2353 JH/24 The OCSP stapling feature is moved from Experimental into the mainline.
2355 TL/12 Bug 1444: Fix improper \r\n sequence handling when writing spool
2356 file. Patch from Wolfgang Breyha.
2358 JH/25 Expand the coverage of the delivery $host and $host_address to
2359 client authenticators run in verify callout. Bug 1476.
2361 JH/26 Port service names are now accepted for tls_on_connect_ports, to
2362 align with daemon_smtp_ports. Bug 72.
2364 TF/03 Fix udpsend. The ip_connectedsocket() function's socket type
2365 support and error reporting did not work properly.
2367 TL/13 Bug 1495: Exiqgrep check if -C config file specified on cli exists
2368 and is readable. Patch from Andrew Colin Kissa.
2370 TL/14 Enhance documentation of ${run expansion and how it parses the
2371 commandline after expansion, particularly in the case when an
2372 unquoted variable expansion results in an empty value.
2374 JH/27 The TLS SNI feature was broken in 4.82. Fix it.
2376 PP/02 Fix internal collision of T_APL on systems which support RFC3123
2377 by renaming away from it. Addresses GH issue 15, reported by
2380 JH/28 Fix parsing of MIME headers for parameters with quoted semicolons.
2382 TL/15 SECURITY: prevent double expansion in math comparison functions
2383 (can expand unsanitized data). Not remotely exploitable.
2390 PP/01 Add -bI: framework, and -bI:sieve for querying sieve capabilities.
2392 PP/02 Make -n do something, by making it not do something.
2393 When combined with -bP, the name of an option is not output.
2395 PP/03 Added tls_dh_min_bits SMTP transport driver option, only honoured
2398 PP/04 First step towards DNSSEC, provide $sender_host_dnssec for
2399 $sender_host_name and config options to manage this, and basic check
2402 PP/05 DSCP support for outbound connections and control modifier for inbound.
2404 PP/06 Cyrus SASL: set local and remote IP;port properties for driver.
2405 (Only plugin which currently uses this is kerberos4, which nobody should
2406 be using, but we should make it available and other future plugins might
2407 conceivably use it, even though it would break NAT; stuff *should* be
2408 using channel bindings instead).
2410 PP/07 Handle "exim -L <tag>" to indicate to use syslog with tag as the process
2411 name; added for Sendmail compatibility; requires admin caller.
2412 Handle -G as equivalent to "control = suppress_local_fixups" (we used to
2413 just ignore it); requires trusted caller.
2414 Also parse but ignore: -Ac -Am -X<logfile>
2417 TL/01 Bugzilla 1258 - Refactor MAIL FROM optional args processing.
2419 TL/02 Add +smtp_confirmation as a default logging option.
2421 TL/03 Bugzilla 198 - Implement remove_header ACL modifier.
2422 Patch by Magnus Holmgren from 2007-02-20.
2424 TL/04 Bugzilla 1281 - Spec typo.
2425 Bugzilla 1283 - Spec typo.
2426 Bugzilla 1290 - Spec grammar fixes.
2428 TL/05 Bugzilla 1285 - Spec omission, fix docbook errors for spec.txt creation.
2430 TL/06 Add Experimental DMARC support using libopendmarc libraries.
2432 TL/07 Fix an out of order global option causing a segfault. Reported to dev
2433 mailing list by by Dmitry Isaikin.
2435 JH/01 Bugzilla 1201 & 304 - New cutthrough-delivery feature, with TLS support.
2437 JH/02 Support "G" suffix to numbers in ${if comparisons.
2439 PP/08 Handle smtp transport tls_sni option forced-fail for OpenSSL.
2441 NM/01 Bugzilla 1197 - Spec typo
2442 Bugzilla 1196 - Spec examples corrections
2444 JH/03 Add expansion operators ${listnamed:name} and ${listcount:string}
2446 PP/09 Add gnutls_allow_auto_pkcs11 option (was originally called
2447 gnutls_enable_pkcs11, but renamed to more accurately indicate its
2450 PP/10 Let Linux makefile inherit CFLAGS/CFLAGS_DYNAMIC.
2451 Pulled from Debian 30_dontoverridecflags.dpatch by Andreas Metzler.
2453 JH/04 Add expansion item ${acl {name}{arg}...}, expansion condition
2454 "acl {{name}{arg}...}", and optional args on acl condition
2457 JH/05 Permit multiple router/transport headers_add/remove lines.
2459 JH/06 Add dnsdb pseudo-lookup "a+" to do an "aaaa" + "a" combination.
2461 JH/07 Avoid using a waiting database for a single-message-only transport.
2462 Performance patch from Paul Fisher. Bugzilla 1262.
2464 JH/08 Strip leading/trailing newlines from add_header ACL modifier data.
2467 JH/09 Add $headers_added variable, with content from use of ACL modifier
2468 add_header (but not yet added to the message). Bugzilla 199.
2470 JH/10 Add 8bitmime log_selector, for 8bitmime status on the received line.
2471 Pulled from Bugzilla 817 by Wolfgang Breyha.
2473 PP/11 SECURITY: protect DKIM DNS decoding from remote exploit.
2475 (nb: this is the same fix as in Exim 4.80.1)
2477 JH/11 Add A= logging on delivery lines, and a client_set_id option on
2480 JH/12 Add optional authenticated_sender logging to A= and a log_selector
2483 PP/12 Unbreak server_set_id for NTLM/SPA auth, broken by 4.80 PP/29.
2485 PP/13 Dovecot auth: log better reason to rejectlog if Dovecot did not
2486 advertise SMTP AUTH mechanism to us, instead of a generic
2487 protocol violation error. Also, make Exim more robust to bad
2488 data from the Dovecot auth socket.
2490 TF/01 Fix ultimate retry timeouts for intermittently deliverable recipients.
2492 When a queue runner is handling a message, Exim first routes the
2493 recipient addresses, during which it prunes them based on the retry
2494 hints database. After that it attempts to deliver the message to
2495 any remaining recipients. It then updates the hints database using
2498 So if a recipient address works intermittently, it can get repeatedly
2499 deferred at routing time. The retry hints record remains fresh so the
2500 address never reaches the final cutoff time.
2502 This is a fairly common occurrence when a user is bumping up against
2503 their storage quota. Exim had some logic in its local delivery code
2504 to deal with this. However it did not apply to per-recipient defers
2505 in remote deliveries, e.g. over LMTP to a separate IMAP message store.
2507 This change adds a proper retry rule check during routing so that the
2508 final cutoff time is checked against the message's age. We only do
2509 this check if there is an address retry record and there is not a
2510 domain retry record; this implies that previous attempts to handle
2511 the address had the retry_use_local_parts option turned on. We use
2512 this as an approximation for the destination being like a local
2513 delivery, as in LMTP.
2515 I suspect this new check makes the old local delivery cutoff check
2516 redundant, but I have not verified this so I left the code in place.
2518 TF/02 Correct gecos expansion when From: is a prefix of the username.
2520 Test 0254 submits a message to Exim with the header
2524 When I ran the test suite under the user fanf2, Exim expanded
2525 the header to contain my full name, whereas it should have added
2526 a Resent-Sender: header. It erroneously treats any prefix of the
2527 username as equal to the username.
2529 This change corrects that bug.
2531 GF/01 DCC debug and logging tidyup
2532 Error conditions log to paniclog rather than rejectlog.
2533 Debug lines prefixed by "DCC: " to remove any ambiguity.
2535 TF/03 Avoid unnecessary rebuilds of lookup-related code.
2537 PP/14 Fix OCSP reinitialisation in SNI handling for Exim/TLS as server.
2538 Bug spotted by Jeremy Harris; was flawed since initial commit.
2539 Would have resulted in OCSP responses post-SNI triggering an Exim
2540 NULL dereference and crash.
2542 JH/13 Add $router_name and $transport_name variables. Bugzilla 308.
2544 PP/15 Define SIOCGIFCONF_GIVES_ADDR for GNU Hurd.
2545 Bug detection, analysis and fix by Samuel Thibault.
2546 Bugzilla 1331, Debian bug #698092.
2548 SC/01 Update eximstats to watch out for senders sending 'HELO [IpAddr]'
2550 JH/14 SMTP PRDR (http://www.eric-a-hall.com/specs/draft-hall-prdr-00.txt).
2551 Server implementation by Todd Lyons, client by JH.
2552 Only enabled when compiled with EXPERIMENTAL_PRDR. A new
2553 config variable "prdr_enable" controls whether the server
2554 advertises the facility. If the client requests PRDR a new
2555 acl_data_smtp_prdr ACL is called once for each recipient, after
2556 the body content is received and before the acl_smtp_data ACL.
2557 The client is controlled by both of: a hosts_try_prdr option
2558 on the smtp transport, and the server advertisement.
2559 Default client logging of deliveries and rejections involving
2560 PRDR are flagged with the string "PRDR".
2562 PP/16 Fix problems caused by timeouts during quit ACLs trying to double
2563 fclose(). Diagnosis by Todd Lyons.
2565 PP/17 Update configure.default to handle IPv6 localhost better.
2566 Patch by Alain Williams (plus minor tweaks).
2569 PP/18 OpenSSL made graceful with empty tls_verify_certificates setting.
2570 This is now consistent with GnuTLS, and is now documented: the
2571 previous undocumented portable approach to treating the option as
2572 unset was to force an expansion failure. That still works, and
2573 an empty string is now equivalent.
2575 PP/19 Renamed DNSSEC-enabling option to "dns_dnssec_ok", to make it
2576 clearer that Exim is using the DO (DNSSEC OK) EDNS0 resolver flag,
2577 not performing validation itself.
2579 PP/20 Added force_command boolean option to pipe transport.
2580 Patch from Nick Koston, of cPanel Inc.
2582 JH/15 AUTH support on callouts (and hence cutthrough-deliveries).
2585 TF/04 Added udpsend ACL modifier and hexquote expansion operator
2587 PP/21 Fix eximon continuous updating with timestamped log-files.
2588 Broken in a format-string cleanup in 4.80, missed when I repaired the
2589 other false fix of the same issue.
2590 Report and fix from Heiko Schlichting.
2593 PP/22 Guard LDAP TLS usage against Solaris LDAP variant.
2594 Report from Prashanth Katuri.
2596 PP/23 Support safari_ecdhe_ecdsa_bug for openssl_options.
2597 It's SecureTransport, so affects any MacOS clients which use the
2598 system-integrated TLS libraries, including email clients.
2600 PP/24 Fix segfault from trying to fprintf() to a NULL stdio FILE* if
2601 using a MIME ACL for non-SMTP local injection.
2602 Report and assistance in diagnosis by Warren Baker.
2604 TL/08 Adjust exiqgrep to be case-insensitive for sender/receiver.
2606 JH/16 Fix comparisons for 64b. Bugzilla 1385.
2608 TL/09 Add expansion variable $authenticated_fail_id to keep track of
2609 last id that failed so it may be referenced in subsequent ACL's.
2611 TL/10 Bugzilla 1375 - Prevent TLS rebinding in ldap. Patch provided by
2614 TL/11 Bugzilla 1382 - Option ldap_require_cert overrides start_tls
2615 ldap library initialization, allowing self-signed CA's to be
2616 used. Also properly sets require_cert option later in code by
2617 using NULL (global ldap config) instead of ldap handle (per
2618 session). Bug diagnosis and testing by alxgomz.
2620 TL/12 Enhanced documentation in the ratelimit.pl script provided in
2621 the src/util/ subdirectory.
2623 TL/13 Bug 1031 - Imported transport SQL logging patch from Axel Rau
2624 renamed to Transport Post Delivery Action by Jeremy Harris, as
2627 TL/14 Bugzilla 1217 - Redis lookup support has been added. It is only enabled
2628 when Exim is compiled with EXPERIMENTAL_REDIS. A new config variable
2629 redis_servers = needs to be configured which will be used by the redis
2630 lookup. Patch from Warren Baker, of The Packet Hub.
2632 TL/15 Fix exiqsumm summary for corner case. Patch provided by Richard Hall.
2634 TL/16 Bugzilla 1289 - Clarify host/ip processing when have errors looking up a
2635 hostname or reverse DNS when processing a host list. Used suggestions
2636 from multiple comments on this bug.
2638 TL/17 Bugzilla 1057 - Multiple clamd TCP targets patch from Mark Zealey.
2640 TL/18 Had previously added a -CONTINUE option to runtest in the test suite.
2641 Missed a few lines, added it to make the runtest require no keyboard
2644 TL/19 Bugzilla 1402 - Test 533 fails if any part of the path to the test suite
2645 contains upper case chars. Make router use caseful_local_part.
2647 TL/20 Bugzilla 1400 - Add AVOID_GNUTLS_PKCS11 build option. Allows GnuTLS
2648 support when GnuTLS has been built with p11-kit.
2654 PP/01 SECURITY: protect DKIM DNS decoding from remote exploit.
2656 This, or similar/improved, will also be change PP/11 of 4.82.
2662 PP/01 Handle short writes when writing local log-files.
2663 In practice, only affects FreeBSD (8 onwards).
2664 Bugzilla 1053, with thanks to Dmitry Isaikin.
2666 NM/01 Bugzilla 949 - Documentation tweak
2668 NM/02 Bugzilla 1093 - eximstats DATA reject detection regexps
2671 NM/03 Bugzilla 1169 - primary_hostname spelling was incorrect in docs.
2673 PP/02 Implemented gsasl authenticator.
2675 PP/03 Implemented heimdal_gssapi authenticator with "server_keytab" option.
2677 PP/04 Local/Makefile support for (AUTH|LOOKUP)_*_PC=foo to use
2678 `pkg-config foo` for cflags/libs.
2680 PP/05 Swapped $auth1/$auth2 for gsasl GSSAPI mechanism, to be more consistent
2681 with rest of GSASL and with heimdal_gssapi.
2683 PP/06 Local/Makefile support for USE_(GNUTLS|OPENSSL)_PC=foo to use
2684 `pkg-config foo` for cflags/libs for the TLS implementation.
2686 PP/07 New expansion variable $tls_bits; Cyrus SASL server connection
2687 properties get this fed in as external SSF. A number of robustness
2688 and debugging improvements to the cyrus_sasl authenticator.
2690 PP/08 cyrus_sasl server now expands the server_realm option.
2692 PP/09 Bugzilla 1214 - Log authentication information in reject log.
2693 Patch by Jeremy Harris.
2695 PP/10 Added dbmjz lookup type.
2697 PP/11 Let heimdal_gssapi authenticator take a SASL message without an authzid.
2699 PP/12 MAIL args handles TAB as well as SP, for better interop with
2700 non-compliant senders.
2701 Analysis and variant patch by Todd Lyons.
2703 NM/04 Bugzilla 1237 - fix cases where printf format usage not indicated
2704 Bug report from Lars Müller <lars@samba.org> (via SUSE),
2705 Patch from Dirk Mueller <dmueller@suse.com>
2707 PP/13 tls_peerdn now print-escaped for spool files.
2708 Observed some $tls_peerdn in wild which contained \n, which resulted
2709 in spool file corruption.
2711 PP/14 TLS fixes for OpenSSL: support TLS 1.1 & 1.2; new "openssl_options"
2712 values; set SSL_MODE_AUTO_RETRY so that OpenSSL will retry a read
2713 or write after TLS renegotiation, which otherwise led to messages
2716 TK/01 Bugzilla 1239 - fix DKIM verification when signature was not inserted
2717 as a tracking header (ie: a signed header comes before the signature).
2718 Patch from Wolfgang Breyha.
2720 JH/01 Bugzilla 660 - Multi-valued attributes from ldap now parseable as a
2721 comma-sep list; embedded commas doubled.
2723 JH/02 Refactored ACL "verify =" logic to table-driven dispatch.
2725 PP/15 LDAP: Check for errors of TLS initialisation, to give correct
2727 Report and patch from Dmitry Banschikov.
2729 PP/16 Removed "dont_insert_empty_fragments" from "openssl_options".
2730 Removed SSL_clear() after SSL_new() which led to protocol negotiation
2731 failures. We appear to now support TLS1.1+ with Exim.
2733 PP/17 OpenSSL: new expansion var $tls_sni, which if used in tls_certificate
2734 lets Exim select keys and certificates based upon TLS SNI from client.
2735 Also option tls_sni on SMTP Transports. Also clear $tls_bits correctly
2736 before an outbound SMTP session. New log_selector, +tls_sni.
2738 PP/18 Bugzilla 1122 - check localhost_number expansion for failure, avoid
2739 NULL dereference. Report and patch from Alun Jones.
2741 PP/19 DNS resolver init changes for NetBSD compatibility. (Risk of breakage
2742 on less well tested platforms). Obviates NetBSD pkgsrc patch-ac.
2743 Not seeing resolver debug output on NetBSD, but suspect this is a
2744 resolver implementation change.
2746 PP/20 Revert part of NM/04, it broke log_path containing %D expansions.
2747 Left warnings. Added "eximon gdb" invocation mode.
2749 PP/21 Defaulting "accept_8bitmime" to true, not false.
2751 PP/22 Added -bw for inetd wait mode support.
2753 PP/23 Added PCRE_CONFIG=yes support to Makefile for using pcre-config to
2754 locate the relevant includes and libraries. Made this the default.
2756 PP/24 Fixed headers_only on smtp transports (was not sending trailing dot).
2757 Bugzilla 1246, report and most of solution from Tomasz Kusy.
2759 JH/03 ${eval } now uses 64-bit and supports a "g" suffix (like to "k" and "m").
2760 This may cause build issues on older platforms.
2762 PP/25 Revamped GnuTLS support, passing tls_require_ciphers to
2763 gnutls_priority_init, ignoring Exim options gnutls_require_kx,
2764 gnutls_require_mac & gnutls_require_protocols (no longer supported).
2765 Added SNI support via GnuTLS too.
2766 Made ${randint:..} supplier available, if using not-too-old GnuTLS.
2768 PP/26 Added EXPERIMENTAL_OCSP for OpenSSL.
2770 PP/27 Applied dnsdb SPF support patch from Janne Snabb.
2771 Applied second patch from Janne, implementing suggestion to default
2772 multiple-strings-in-record handling to match SPF spec.
2774 JH/04 Added expansion variable $tod_epoch_l for a higher-precision time.
2776 PP/28 Fix DCC dcc_header content corruption (stack memory referenced,
2777 read-only, out of scope).
2778 Patch from Wolfgang Breyha, report from Stuart Northfield.
2780 PP/29 Fix three issues highlighted by clang analyser static analysis.
2781 Only crash-plausible issue would require the Cambridge-specific
2782 iplookup router and a misconfiguration.
2783 Report from Marcin Mirosław.
2785 PP/30 Another attempt to deal with PCRE_PRERELEASE, this one less buggy.
2787 PP/31 %D in printf continues to cause issues (-Wformat=security), so for
2788 now guard some of the printf checks behind WANT_DEEPER_PRINTF_CHECKS.
2789 As part of this, removing so much warning spew let me fix some minor
2790 real issues in debug logging.
2792 PP/32 GnuTLS was always using default tls_require_ciphers, due to a missing
2793 assignment on my part. Fixed.
2795 PP/33 Added tls_dh_max_bits option, defaulting to current hard-coded limit
2796 of NSS, for GnuTLS/NSS interop. Problem root cause diagnosis by
2797 Janne Snabb (who went above and beyond: thank you).
2799 PP/34 Validate tls_require_ciphers on startup, since debugging an invalid
2800 string otherwise requires a connection and a bunch more work and it's
2801 relatively easy to get wrong. Should also expose TLS library linkage
2804 PP/35 Pull in <features.h> on Linux, for some portability edge-cases of
2805 64-bit ${eval} (JH/03).
2807 PP/36 Define _GNU_SOURCE in exim.h; it's needed for some releases of
2808 GNU libc to support some of the 64-bit stuff, should not lead to
2809 conflicts. Defined before os.h is pulled in, so if a given platform
2810 needs to override this, it can.
2812 PP/37 Unbreak Cyrus SASL auth: SSF retrieval was incorrect, Exim thought
2813 protection layer was required, which is not implemented.
2814 Bugzilla 1254, patch from Wolfgang Breyha.
2816 PP/38 Overhaul DH prime handling, supply RFC-specified DH primes as built
2817 into Exim, default to IKE id 23 from RFC 5114 (2048 bit). Make
2818 tls_dhparam take prime identifiers. Also unbreak combination of
2819 OpenSSL+DH_params+TLSSNI.
2821 PP/39 Disable SSLv2 by default in OpenSSL support.
2827 PP/01 Solaris build fix for Oracle's LDAP libraries.
2828 Bugzilla 1109, patch from Stephen Usher.
2830 TF/01 HP/UX build fix: avoid arithmetic on a void pointer.
2832 TK/01 DKIM Verification: Fix relaxed canon for empty headers w/o
2835 TF/02 Fix a couple more cases where we did not log the error message
2836 when unlink() failed. See also change 4.74-TF/03.
2838 TF/03 Make the exiwhat support code safe for signals. Previously Exim might
2839 lock up or crash if it happened to be inside a call to libc when it
2840 got a SIGUSR1 from exiwhat.
2842 The SIGUSR1 handler appends the current process status to the process
2843 log which is later printed by exiwhat. It used to use the general
2844 purpose logging code to do this, but several functions it calls are
2845 not safe for signals.
2847 The new output code in the SIGUSR1 handler is specific to the process
2848 log, and simple enough that it's easy to inspect for signal safety.
2849 Removing some special cases also simplifies the general logging code.
2850 Removing the spurious timestamps from the process log simplifies
2853 TF/04 Improved ratelimit ACL condition.
2855 The /noupdate option has been deprecated in favour of /readonly which
2856 has clearer semantics. The /leaky, /strict, and /readonly update modes
2857 are mutually exclusive. The update mode is no longer included in the
2858 database key; it just determines when the database is updated. (This
2859 means that when you upgrade Exim will forget old rate measurements.)
2861 Exim now checks that the per_* options are used with an update mode that
2862 makes sense for the current ACL. For example, when Exim is processing a
2863 message (e.g. acl_smtp_rcpt or acl_smtp_data, etc.) you can specify
2864 per_mail/leaky or per_mail/strict; otherwise (e.g. in acl_smtp_helo) you
2865 must specify per_mail/readonly. If you omit the update mode it defaults to
2866 /leaky where that makes sense (as before) or /readonly where required.
2868 The /noupdate option is now undocumented but still supported for
2869 backwards compatibility. It is equivalent to /readonly except that in
2870 ACLs where /readonly is required you may specify /leaky/noupdate or
2871 /strict/noupdate which are treated the same as /readonly.
2873 A useful new feature is the /count= option. This is a generalization
2874 of the per_byte option, so that you can measure the throughput of other
2875 aggregate values. For example, the per_byte option is now equivalent
2876 to per_mail/count=${if >{0}{$message_size} {0} {$message_size} }.
2878 The per_rcpt option has been generalized using the /count= mechanism
2879 (though it's more complicated than the per_byte equivalence). When it is
2880 used in acl_smtp_rcpt, the per_rcpt option adds recipients to the
2881 measured rate one at a time; if it is used later (e.g. in acl_smtp_data)
2882 or in a non-SMTP ACL it adds all the recipients in one go. (The latter
2883 /count=$recipients_count behaviour used to work only in non-SMTP ACLs.)
2884 Note that using per_rcpt with a non-readonly update mode in more than
2885 one ACL will cause the recipients to be double-counted. (The per_mail
2886 and per_byte options don't have this problem.)
2888 The handling of very low rates has changed slightly. If the computed rate
2889 is less than the event's count (usually one) then this event is the first
2890 after a long gap. In this case the rate is set to the same as this event's
2891 count, so that the first message of a spam run is counted properly.
2893 The major new feature is a mechanism for counting the rate of unique
2894 events. The new per_addr option counts the number of different
2895 recipients that someone has sent messages to in the last time period. It
2896 behaves like per_rcpt if all the recipient addresses are different, but
2897 duplicate recipient addresses do not increase the measured rate. Like
2898 the /count= option this is a general mechanism, so the per_addr option
2899 is equivalent to per_rcpt/unique=$local_part@$domain. You can, for
2900 example, measure the rate that a client uses different sender addresses
2901 with the options per_mail/unique=$sender_address. There are further
2902 details in the main documentation.
2904 TF/05 Removed obsolete $Cambridge$ CVS revision strings.
2906 TF/06 Removed a few PCRE remnants.
2908 TF/07 Automatically extract Exim's version number from tags in the git
2909 repository when doing development or release builds.
2911 PP/02 Raise smtp_cmd_buffer_size to 16kB.
2912 Bugzilla 879. Patch from Paul Fisher.
2914 PP/03 Implement SSL-on-connect outbound with protocol=smtps on smtp transport.
2915 Heavily based on revision 40f9a89a from Simon Arlott's tree.
2918 PP/04 Use .dylib instead of .so for dynamic library loading on MacOS.
2920 PP/05 Variable $av_failed, true if the AV scanner deferred.
2921 Bugzilla 1078. Patch from John Horne.
2923 PP/06 Stop make process more reliably on build failure.
2924 Bugzilla 1087. Patch from Heiko Schlittermann.
2926 PP/07 Make maildir_use_size_file an _expandable_ boolean.
2927 Bugzilla 1089. Patch from Heiko Schlittermann.
2929 PP/08 Handle ${run} returning more data than OS pipe buffer size.
2930 Bugzilla 1131. Patch from Holger Weiß.
2932 PP/09 Handle IPv6 addresses with SPF.
2933 Bugzilla 860. Patch from Wolfgang Breyha.
2935 PP/10 GnuTLS: support TLS 1.2 & 1.1.
2937 Use gnutls_certificate_verify_peers2() [patch from Andreas Metzler].
2940 PP/11 match_* no longer expand right-hand-side by default.
2941 New compile-time build option, EXPAND_LISTMATCH_RHS.
2942 New expansion conditions, "inlist", "inlisti".
2944 PP/12 fix uninitialised greeting string from PP/03 (smtps client support).
2946 PP/13 shell and compiler warnings fixes for RC1-RC4 changes.
2948 PP/14 fix log_write() format string regression from TF/03.
2949 Bugzilla 1152. Patch from Dmitry Isaikin.
2955 PP/01 The new ldap_require_cert option would segfault if used. Fixed.
2957 PP/02 Harmonised TLS library version reporting; only show if debugging.
2958 Layout now matches that introduced for other libraries in 4.74 PP/03.
2960 PP/03 New openssl_options items: no_sslv2 no_sslv3 no_ticket no_tlsv1
2962 PP/04 New "dns_use_edns0" global option.
2964 PP/05 Don't segfault on misconfiguration of ref:name exim-user as uid.
2967 PP/06 Extra paranoia around buffer usage at the STARTTLS transition.
2968 nb: Exim is not vulnerable to http://www.kb.cert.org/vuls/id/555316
2970 TK/01 Updated PolarSSL code to 0.14.2.
2971 Bugzilla 1097. Patch from Andreas Metzler.
2973 PP/07 Catch divide-by-zero in ${eval:...}.
2974 Fixes bugzilla 1102.
2976 PP/08 Condition negation of bool{}/bool_lax{} did not negate. Fixed.
2979 TK/02 Bugzilla 1106: CVE-2011-1764 - DKIM log line was subject to a
2980 format-string attack -- SECURITY: remote arbitrary code execution.
2982 TK/03 SECURITY - DKIM signature header parsing was double-expanded, second
2983 time unintentionally subject to list matching rules, letting the header
2984 cause arbitrary Exim lookups (of items which can occur in lists, *not*
2985 arbitrary string expansion). This allowed for information disclosure.
2987 PP/09 Fix another SIGFPE (x86) in ${eval:...} expansion, this time related to
2988 INT_MIN/-1 -- value coerced to INT_MAX.
2994 NM/01 Workaround for PCRE version dependency in version reporting
2997 TF/01 Update valgrind.h and memcheck.h to copies from valgrind-3.6.0.
2998 This fixes portability to compilers other than gcc, notably
2999 Solaris CC and HP-UX CC. Fixes Bugzilla 1050.
3001 TF/02 Bugzilla 139: Avoid using the += operator in the modular lookup
3002 makefiles for portability to HP-UX and POSIX correctness.
3004 PP/01 Permit LOOKUP_foo enabling on the make command-line.
3005 Also via indented variable definition in the Makefile.
3006 (Debugging by Oliver Heesakkers).
3008 PP/02 Restore caching of spamd results with expanded spamd_address.
3009 Patch from author of expandable spamd_address patch, Wolfgang Breyha.
3011 PP/03 Build issue: lookups-Makefile now exports LC_ALL=C
3012 Improves build reliability. Fix from: Frank Elsner
3014 NM/02 Fix wide character breakage in the rfc2047 coding
3015 Fixes bug 1064. Patch from Andrey N. Oktyabrski
3017 NM/03 Allow underscore in dnslist lookups
3018 Fixes bug 1026. Patch from Graeme Fowler
3020 PP/04 Bugzilla 230: Support TLS-enabled LDAP (in addition to ldaps).
3021 Code patches from Adam Ciarcinski of NetBSD.
3023 NM/04 Fixed exiqgrep to cope with mailq missing size issue
3026 PP/05 Bugzilla 1083: when lookup expansion defers, escape the output which
3027 is logged, to avoid truncation. Patch from John Horne.
3029 PP/06 Bugzilla 1042: implement freeze_signal on pipe transports.
3030 Patch from Jakob Hirsch.
3032 PP/07 Bugzilla 1061: restrict error messages sent over SMTP to not reveal
3033 SQL string expansion failure details.
3034 Patch from Andrey Oktyabrski.
3036 PP/08 Bugzilla 486: implement %M datestamping in log filenames.
3037 Patch from Simon Arlott.
3039 PP/09 New lookups functionality failed to compile on old gcc which rejects
3040 extern declarations in function scope.
3041 Patch from Oliver Fleischmann
3043 PP/10 Use sig_atomic_t for flags set from signal handlers.
3044 Check getgroups() return and improve debugging.
3045 Fixed developed for diagnosis in bug 927 (which turned out to be
3048 PP/11 Bugzilla 1055: Update $message_linecount for maildir_tag.
3049 Patch from Mark Zealey.
3051 PP/12 Bugzilla 1056: Improved spamd server selection.
3052 Patch from Mark Zealey.
3054 PP/13 Bugzilla 1086: Deal with maildir quota file races.
3055 Based on patch from Heiko Schlittermann.
3057 PP/14 Bugzilla 1019: DKIM multiple signature generation fix.
3058 Patch from Uwe Doering, sign-off by Michael Haardt.
3060 NM/05 Fix to spam.c to accommodate older gcc versions which dislike
3061 variable declaration deep within a block. Bug and patch from
3064 PP/15 lookups-Makefile IRIX compatibility coercion.
3066 PP/16 Make DISABLE_DKIM build knob functional.
3068 NM/06 Bugzilla 968: child_open_uid: restore default SIGPIPE handler
3069 Patch by Simon Arlott
3071 TF/03 Fix valgrind.h portability to C89 compilers that do not support
3072 variable argument macros. Our copy now differs from upstream.
3078 TF/01 Failure to get a lock on a hints database can have serious
3079 consequences so log it to the panic log.
3081 TF/02 Log LMTP confirmation messages in the same way as SMTP,
3082 controlled using the smtp_confirmation log selector.
3084 TF/03 Include the error message when we fail to unlink a spool file.
3086 DW/01 Bugzilla 139: Support dynamically loaded lookups as modules.
3087 With thanks to Steve Haslam, Johannes Berg & Serge Demonchaux
3088 for maintaining out-of-tree patches for some time.
3090 PP/01 Bugzilla 139: Documentation and portability issues.
3091 Avoid GNU Makefile-isms, let Exim continue to build on BSD.
3092 Handle per-OS dynamic-module compilation flags.
3094 PP/02 Let /dev/null have normal permissions.
3095 The 4.73 fixes were a little too stringent and complained about the
3096 permissions on /dev/null. Exempt it from some checks.
3097 Reported by Andreas M. Kirchwitz.
3099 PP/03 Report version information for many libraries, including
3100 Exim version information for dynamically loaded libraries. Created
3101 version.h, now support a version extension string for distributors
3102 who patch heavily. Dynamic module ABI change.
3104 PP/04 CVE-2011-0017 - check return value of setuid/setgid. This is a
3105 privilege escalation vulnerability whereby the Exim run-time user
3106 can cause root to append content of the attacker's choosing to
3109 PP/05 Bugzilla 1041: merged DCC maintainer's fixes for return code.
3112 PP/06 Bugzilla 1071: fix delivery logging with untrusted macros.
3113 If dropping privileges for untrusted macros, we disabled normal logging
3114 on the basis that it would fail; for the Exim run-time user, this is not
3115 the case, and it resulted in successful deliveries going unlogged.
3116 Fixed. Reported by Andreas Metzler.
3122 PP/01 Date: & Message-Id: revert to normally being appended to a message,
3123 only prepend for the Resent-* case. Fixes regression introduced in
3124 Exim 4.70 by NM/22 for Bugzilla 607.
3126 PP/02 Include check_rfc2047_length in configure.default because we're seeing
3127 increasing numbers of administrators be bitten by this.
3129 JJ/01 Added DISABLE_DKIM and comment to src/EDITME
3131 PP/03 Bugzilla 994: added openssl_options main configuration option.
3133 PP/04 Bugzilla 995: provide better SSL diagnostics on failed reads.
3135 PP/05 Bugzilla 834: provide a permit_coredump option for pipe transports.
3137 PP/06 Adjust NTLM authentication to handle SASL Initial Response.
3139 PP/07 If TLS negotiated an anonymous cipher, we could end up with SSL but
3140 without a peer certificate, leading to a segfault because of an
3141 assumption that peers always have certificates. Be a little more
3142 paranoid. Problem reported by Martin Tscholak.
3144 PP/08 Bugzilla 926: switch ClamAV to use the new zINSTREAM API for content
3145 filtering; old API available if built with WITH_OLD_CLAMAV_STREAM=yes
3146 NB: ClamAV planning to remove STREAM in "middle of 2010".
3147 CL also introduces -bmalware, various -d+acl logging additions and
3148 more caution in buffer sizes.
3150 PP/09 Implemented reverse_ip expansion operator.
3152 PP/10 Bugzilla 937: provide a "debug" ACL control.
3154 PP/11 Bugzilla 922: Documentation dusting, patch provided by John Horne.
3156 PP/12 Bugzilla 973: Implement --version.
3158 PP/13 Bugzilla 752: Refuse to build/run if Exim user is root/0.
3160 PP/14 Build without WITH_CONTENT_SCAN. Path from Andreas Metzler.
3162 PP/15 Bugzilla 816: support multiple condition rules on Routers.
3164 PP/16 Add bool_lax{} expansion operator and use that for combining multiple
3165 condition rules, instead of bool{}. Make both bool{} and bool_lax{}
3166 ignore trailing whitespace.
3168 JJ/02 prevent non-panic DKIM error from being sent to paniclog
3170 JJ/03 added tcp_wrappers_daemon_name to allow host entries other than
3173 PP/17 Fix malware regression for cmdline scanner introduced in PP/08.
3174 Notification from Dr Andrew Aitchison.
3176 PP/18 Change ClamAV response parsing to be more robust and to handle ClamAV's
3177 ExtendedDetectionInfo response format.
3178 Notification from John Horne.
3180 PP/19 OpenSSL 1.0.0a compatibility const-ness change, should be backwards
3183 PP/20 Added a CONTRIBUTING file. Fixed the documentation build to use http:
3184 XSL and documented dependency on system catalogs, with examples of how
3187 DW/21 Added Valgrind hooks in store.c to help it capture out-of-bounds store
3190 DW/22 Bugzilla 1044: CVE-2010-4345 - partial fix: restrict default behaviour
3191 of CONFIGURE_OWNER and CONFIGURE_GROUP options to no longer allow a
3192 configuration file which is writeable by the Exim user or group.
3194 DW/23 Bugzilla 1044: CVE-2010-4345 - part two: extend checks for writeability
3195 of configuration files to cover files specified with the -C option if
3196 they are going to be used with root privileges, not just the default
3199 DW/24 Bugzilla 1044: CVE-2010-4345 - part three: remove ALT_CONFIG_ROOT_ONLY
3200 option (effectively making it always true).
3202 DW/25 Add TRUSTED_CONFIG_PREFIX_FILE option to allow alternative configuration
3203 files to be used while preserving root privileges.
3205 DW/26 Set FD_CLOEXEC on SMTP sockets after forking in the daemon, to ensure
3206 that rogue child processes cannot use them.
3208 PP/27 Bugzilla 1047: change the default for system_filter_user to be the Exim
3209 run-time user, instead of root.
3211 PP/28 Add WHITELIST_D_MACROS option to let some macros be overridden by the
3212 Exim run-time user without dropping privileges.
3214 DW/29 Remove use of va_copy() which breaks pre-C99 systems. Duplicate the
3215 result string, instead of calling string_vformat() twice with the same
3218 DW/30 Allow TRUSTED_CONFIG_PREFIX_FILE only for Exim or CONFIGURE_OWNER, not
3219 for other users. Others should always drop root privileges if they use
3220 -C on the command line, even for a whitelisted configure file.
3222 DW/31 Turn TRUSTED_CONFIG_PREFIX_FILE into TRUSTED_CONFIG_FILE. No prefixes.
3224 NM/01 Fixed bug #1002 - Message loss when using multiple deliveries
3230 JJ/01 installed exipick 20100104.1, adding $max_received_linelength,
3231 $data_path, and $header_path variables; fixed documentation bugs and
3234 JJ/02 installed exipick 20100222.0, added --input-dir and --finput to allow
3235 exipick to access non-standard spools, including the "frozen" queue
3238 NM/01 Bugzilla 965: Support mysql stored procedures.
3239 Patch from Alain Williams
3241 NM/02 Bugzilla 961: Spacing fix (syntax error) on Makefile directives for NetBSD
3243 NM/03 Bugzilla 955: Documentation fix for max_rcpts.
3244 Patch from Andreas Metzler
3246 NM/04 Bugzilla 954: Fix for unknown responses from Dovecot authenticator.
3247 Patch from Kirill Miazine
3249 NM/05 Bugzilla 671: Added umask to procmail example.
3251 JJ/03 installed exipick 20100323.0, fixing doc bug
3253 NM/06 Bugzilla 988: CVE-2010-2023 - prevent hardlink attack on sticky mail
3254 directory. Notification and patch from Dan Rosenberg.
3256 TK/01 PDKIM: Upgrade PolarSSL files to upstream version 0.12.1.
3258 TK/02 Improve log output when DKIM signing operation fails.
3260 MH/01 Treat the transport option dkim_domain as a colon separated
3261 list, not as a single string, and sign the message with each element,
3262 omitting multiple occurences of the same signer.
3264 NM/07 Null terminate DKIM strings, Null initialise DKIM variable
3265 Bugzilla 985, 986. Patch by Simon Arlott
3267 NM/08 Bugzilla 967. dnsdb DNS TXT record bug fix (DKIM-related)
3268 Patch by Simon Arlott
3270 PP/01 Bugzilla 989: CVE-2010-2024 - work round race condition on
3271 MBX locking. Notification from Dan Rosenberg.
3277 TK/01 Bugzilla 912: Fix DKIM segfault on empty headers/body.
3279 NM/01 Bugzilla 913: Documentation fix for gnutls_* options.
3281 NM/02 Bugzilla 722: Documentation for randint. Better randomness defaults.
3283 NM/03 Bugzilla 847: Enable DNSDB lookup by default.
3285 NM/04 Bugzilla 915: Flag broken perl installation during build.
3291 TK/01 Added patch by Johannes Berg that expands the main option
3292 "spamd_address" if it starts with a dollar sign.
3294 TK/02 Write list of recipients to X-Envelope-Sender header when building
3295 the mbox-format spool file for content scanning (suggested by Jakob
3298 TK/03 Added patch by Wolfgang Breyha that adds experimental DCC
3299 (http://www.dcc-servers.net/) support via dccifd. Activated by
3300 setting EXPERIMENTAL_DCC=yes in Local/Makefile.
3302 TK/04 Bugzilla 673: Add f-protd malware scanner support. Patch submitted
3303 by Mark Daniel Reidel <mr@df.eu>.
3305 NM/01 Bugzilla 657: Embedded PCRE removed from the exim source tree.
3306 When building exim an external PCRE library is now needed -
3307 PCRE is a system library on the majority of modern systems.
3308 See entry on PCRE_LIBS in EDITME file.
3310 NM/02 Bugzilla 646: Removed unwanted C/R in Dovecot authenticator
3311 conversation. Added nologin parameter to request.
3312 Patch contributed by Kirill Miazine.
3314 TF/01 Do not log submission mode rewrites if they do not change the address.
3316 TF/02 Bugzilla 662: Fix stack corruption before exec() in daemon.c.
3318 NM/03 Bugzilla 602: exicyclog now handles panic log, and creates empty
3319 log files in place. Contributed by Roberto Lima.
3321 NM/04 Bugzilla 667: Close socket used by dovecot authenticator.
3323 TF/03 Bugzilla 615: When checking the local_parts router precondition
3324 after a local_part_suffix or local_part_prefix option, Exim now
3325 does not use the address's named list lookup cache, since this
3326 contains cached lookups for the whole local part.
3328 NM/05 Bugzilla 521: Integrated SPF Best Guess support contributed by
3329 Robert Millan. Documentation is in experimental-spec.txt.
3331 TF/04 Bugzilla 668: Fix parallel build (make -j).
3333 NM/05.2 Bugzilla 437: Prevent Maildir aux files being created with mode 000.
3335 NM/05.3 Bugzilla 598: Improvement to Dovecot authenticator handling.
3336 Patch provided by Jan Srzednicki.
3338 TF/05 Leading white space used to be stripped from $spam_report which
3339 wrecked the formatting. Now it is preserved.
3341 TF/06 Save $spam_score, $spam_bar, and $spam_report in spool files, so
3342 that they are available at delivery time.
3344 TF/07 Fix the way ${extract is skipped in the untaken branch of a conditional.
3346 TF/08 TLS error reporting now respects the incoming_interface and
3347 incoming_port log selectors.
3349 TF/09 Produce a more useful error message if an SMTP transport's hosts
3350 setting expands to an empty string.
3352 NM/06 Bugzilla 744: EXPN did not work under TLS.
3353 Patch provided by Phil Pennock.
3355 NM/07 Bugzilla 769: Extraneous comma in usage fprintf
3356 Patch provided by Richard Godbee.
3358 NM/08 Fixed erroneous documentation references to smtp_notquit_acl to be
3359 acl_smtp_notquit, added index entry.
3361 NM/09 Bugzilla 787: Potential buffer overflow in string_format.
3362 Patch provided by Eugene Bujak.
3364 NM/10 Bugzilla 770: Problem on some platforms modifying the len parameter to
3365 accept(). Patch provided by Maxim Dounin.
3367 NM/11 Bugzilla 749: Preserve old behaviour of blanks comparing equal to zero.
3368 Patch provided by Phil Pennock.
3370 NM/12 Bugzilla 497: Correct behaviour of exiwhat when no config exists.
3372 NM/13 Bugzilla 590: Correct handling of Resent-Date headers.
3373 Patch provided by Brad "anomie" Jorsch.
3375 NM/14 Bugzilla 622: Added timeout setting to transport filter.
3376 Patch provided by Dean Brooks.
3378 TK/05 Add native DKIM support (does not depend on external libraries).
3380 NM/15 Bugzilla 854: Removed code that symlinks to pcre as its no longer useful.
3381 Patch provided by Graeme Fowler.
3383 NM/16 Bugzilla 851: Documentation example syntax fix.
3385 NM/17 Changed NOTICE file to remove references to embedded PCRE.
3387 NM/18 Bugzilla 894: Fix issue with very long lines including comments in
3390 NM/19 Bugzilla 745: TLS version reporting.
3391 Patch provided by Phil Pennock.
3393 NM/20 Bugzilla 167: bool: condition support.
3394 Patch provided by Phil Pennock.
3396 NM/21 Bugzilla 665: gnutls_compat_mode to allow compatibility with broken
3397 clients. Patch provided by Phil Pennock.
3399 NM/22 Bugzilla 607: prepend (not append) Resent-Message-ID and Resent-Date.
3400 Patch provided by Brad "anomie" Jorsch.
3402 NM/23 Bugzilla 687: Fix misparses in eximstats.
3403 Patch provided by Heiko Schlittermann.
3405 NM/24 Bugzilla 688: Fix exiwhat to handle log_selector = +pid.
3406 Patch provided by Heiko Schlittermann.
3408 NM/25 Bugzilla 727: Use transport mode as default mode for maildirsize file.
3409 plus update to original patch.
3411 NM/26 Bugzilla 799: Documentation correction for ratelimit.
3413 NM/27 Bugzilla 802: Improvements to local interface IP addr detection.
3414 Patch provided by David Brownlee.
3416 NM/28 Bugzilla 807: Improvements to LMTP delivery logging.
3418 NM/29 Bugzilla 862, 866, 875: Documentation bugfixes.
3420 NM/30 Bugzilla 888: TLS documentation bugfixes.
3422 NM/31 Bugzilla 896: Dovecot buffer overrun fix.
3424 NM/32 Bugzilla 889: Change all instances of "expr" in shell scripts to "expr --"
3425 Unlike the original bugzilla I have changed all shell scripts in src tree.
3427 NM/33 Bugzilla 898: Transport filter timeout fix.
3428 Patch by Todd Rinaldo.
3430 NM/34 Bugzilla 901: Fix sign/unsigned and UTF mismatches.
3431 Patch by Serge Demonchaux.
3433 NM/35 Bugzilla 39: Base64 decode bug fixes.
3434 Patch by Jakob Hirsch.
3436 NM/36 Bugzilla 909: Correct connect() call in dcc code.
3438 NM/37 Bugzilla 910: Correct issue with relaxed/simple handling.
3440 NM/38 Bugzilla 908: Removed NetBSD3 support as no longer needed.
3442 NM/39 Bugzilla 911: Fixed MakeLinks build script.
3448 TK/01 Add preliminary DKIM support. Currently requires a forked version of
3449 ALT-N's libdkim that I have put here:
3450 http://duncanthrax.net/exim-experimental/
3452 Note to Michael Haardt: I had to rename some vars in sieve.c. They
3453 were called 'true' and it seems that C99 defines that as a reserved
3454 keyword to be used with 'bool' variable types. That means you could
3455 not include C99-style headers which use bools without triggering
3456 build errors in sieve.c.
3458 NM/01 Bugzilla 592: --help option is handled incorrectly if exim is invoked
3459 as mailq or other aliases. Changed the --help handling significantly
3460 to do whats expected. exim_usage() emits usage/help information.
3462 SC/01 Added the -bylocaldomain option to eximstats.
3464 NM/02 Bugzilla 619: Defended against bad data coming back from gethostbyaddr.
3466 NM/03 Bugzilla 613: Documentation fix for acl_not_smtp.
3468 NM/04 Bugzilla 628: PCRE update to 7.4 (work done by John Hall).
3474 PH/01 Another patch from the Sieve maintainer.
3476 PH/02 When an IPv6 address is converted to a string for single-key lookup
3477 in an address list (e.g. for an item such as "net24-dbm;/net/works"),
3478 dots are used instead of colons so that keys in lsearch files need not
3479 contain colons. This was done some time before quoting was made available
3480 in lsearch files. However, iplsearch files do require colons in IPv6 keys
3481 (notated using the quote facility) so as to distinguish them from IPv4
3482 keys. This meant that lookups for IP addresses in host lists did not work
3483 for iplsearch lookups.
3485 This has been fixed by arranging for IPv6 addresses to be expressed with
3486 colons if the lookup type is iplsearch. This is not incompatible, because
3487 previously such lookups could never work.
3489 The situation is now rather anomalous, since one *can* have colons in
3490 ordinary lsearch keys. However, making the change in all cases is
3491 incompatible and would probably break a number of configurations.
3493 TK/01 Change PRVS address formatting scheme to reflect latests BATV draft
3496 MH/01 The "spam" ACL condition code contained a sscanf() call with a %s
3497 conversion specification without a maximum field width, thereby enabling
3498 a rogue spamd server to cause a buffer overflow. While nobody in their
3499 right mind would setup Exim to query an untrusted spamd server, an
3500 attacker that gains access to a server running spamd could potentially
3501 exploit this vulnerability to run arbitrary code as the Exim user.
3503 TK/02 Bugzilla 502: Apply patch to make the SPF-Received: header use
3504 $primary_hostname instead of what libspf2 thinks the hosts name is.
3506 MH/02 The dsearch lookup now uses lstat(2) instead of stat(2) to look for
3507 a directory entry by the name of the lookup key. Previously, if a
3508 symlink pointed to a non-existing file or a file in a directory that
3509 Exim lacked permissions to read, a lookup for a key matching that
3510 symlink would fail. Now it is enough that a matching directory entry
3511 exists, symlink or not. (Bugzilla 503.)
3513 PH/03 The body_linecount and body_zerocount variables are now exported in the
3516 PH/04 Added the $dnslist_matched variable.
3518 PH/05 Unset $tls_cipher and $tls_peerdn before making a connection as a client.
3519 This means they are set thereafter only if the connection becomes
3522 PH/06 Added the client_condition to authenticators so that some can be skipped
3523 by clients under certain conditions.
3525 PH/07 The error message for a badly-placed control=no_multiline_responses left
3526 "_responses" off the end of the name.
3528 PH/08 Added -Mvc to output a copy of a message in RFC 2822 format.
3530 PH/09 Tidied the code for creating ratelimiting keys, creating them explicitly
3531 (without spaces) instead of just copying the configuration text.
3533 PH/10 Added the /noupdate option to the ratelimit ACL condition.
3535 PH/11 Added $max_received_linelength.
3537 PH/12 Added +ignore_defer and +include_defer to host lists.
3539 PH/13 Installed PCRE version 7.2. This needed some changes because of the new
3540 way in which PCRE > 7.0 is built.
3542 PH/14 Implemented queue_only_load_latch.
3544 PH/15 Removed an incorrect (int) cast when reading the value of SIZE in a
3545 MAIL command. The effect was to mangle the value on 64-bit systems.
3547 PH/16 Another patch from the Sieve maintainer.
3549 PH/17 Added the NOTQUIT ACL, based on a patch from Ted Cooper.
3551 PH/18 If a system quota error occurred while trying to create the file for
3552 a maildir delivery, the message "Mailbox is full" was not appended to the
3553 bounce if the delivery eventually timed out. Change 4.67/27 below applied
3554 only to a quota excession during the actual writing of the file.
3556 PH/19 It seems that peer DN values may contain newlines (and other non-printing
3557 characters?) which causes problems in log lines. The DN values are now
3558 passed through string_printing() before being added to log lines.
3560 PH/20 Added the "servers=" facility to MySQL and PostgreSQL lookups. (Oracle
3561 and InterBase are left for another time.)
3563 PH/21 Added message_body_newlines option.
3565 PH/22 Guard against possible overflow in moan_check_errorcopy().
3567 PH/23 POSIX allows open() to be a macro; guard against that.
3569 PH/24 If the recipient of an error message contained an @ in the local part
3570 (suitably quoted, of course), incorrect values were put in $domain and
3571 $local_part during the evaluation of errors_copy.
3577 MH/01 Fix for bug #448, segfault in Dovecot authenticator when interface_address
3578 is unset (happens when testing with -bh and -oMi isn't used). Thanks to
3581 PH/01 Added a new log selector smtp_no_mail, to log SMTP sessions that do not
3582 issue a MAIL command.
3584 PH/02 In an ACL statement such as
3586 deny dnslists = X!=127.0.0.2 : X=127.0.0.2
3588 if a client was not listed at all, or was listed with a value other than
3589 127.0.0.2, in the X list, but was listed with 127.0.0.2 in the Y list,
3590 the condition was not true (as it should be), so access was not denied.
3591 The bug was that the ! inversion was incorrectly passed on to the second
3592 item. This has been fixed.
3594 PH/03 Added additional dnslists conditions == and =& which are different from
3595 = and & when the dns lookup returns more than one IP address.
3597 PH/04 Added gnutls_require_{kx,mac,protocols} to give more control over the
3598 cipher suites used by GnuTLS. These options are ignored by OpenSSL.
3600 PH/05 After discussion on the list, added a compile time option ENABLE_DISABLE_
3601 FSYNC, which compiles an option called disable_fsync that allows for
3602 bypassing fsync(). The documentation is heavily laced with warnings.
3604 SC/01 Updated eximstats to collate all SpamAssassin rejects into one bucket.
3606 PH/06 Some tidies to the infrastructure of the Test Suite that is concerned
3607 with the auxiliary C programs that it uses: (1) Arrange for BIND_8_COMPAT
3608 to be defined when compiling on OSX (Darwin); (2) Tidies to the Makefile,
3609 including adding "make clean"; (3) Added -fPIC when compiling the test
3610 dynamically loaded module, to get rid of a warning.
3612 MH/02 Fix for bug #451, causing paniclog entries to be written if a bounce
3613 message fails, move_frozen_messages = true and ignore_bounce_errors_after
3614 = 0s. The bug is otherwise harmless.
3616 PH/07 There was a bug in the dovecot authenticator such that the value of
3617 $auth1 could be overwritten, and so not correctly preserved, after a
3618 successful authentication. This usually meant that the value preserved by
3619 the server_setid option was incorrect.
3621 PH/08 Added $smtp_count_at_connection_start, deliberately with a long name.
3623 PH/09 Installed PCRE release 7.0.
3625 PH/10 The acl_not_smtp_start ACL was, contrary to the documentation, not being
3626 run for batched SMTP input. It is now run at the start of every message
3627 in the batch. While fixing this I discovered that the process information
3628 (output by running exiwhat) was not always getting set for -bs and -bS
3629 input. This is fixed, and it now also says "batched" for BSMTP.
3631 PH/11 Added control=no_pipelining.
3633 PH/12 Added $sending_ip_address and $sending_port (mostly Magnus Holmgren's
3634 patch, slightly modified), and move the expansion of helo_data till after
3635 the connection is made in the smtp transport (so it can use these
3638 PH/13 Added ${rfc2047d: to decoded RFC 2047 strings.
3640 PH/14 Added log_selector = +pid.
3642 PH/15 Flush SMTP output before delaying, unless control=no_delay_flush is set.
3644 PH/16 Add ${if forany and ${if forall.
3646 PH/17 Added dsn_from option to vary the From: line in DSNs.
3648 PH/18 Flush SMTP output before performing a callout, unless control =
3649 no_callout_flush is set.
3651 PH/19 Change 4.64/PH/36 introduced a bug: when address_retry_include_sender
3652 was true (the default) a successful delivery failed to delete the retry
3653 item, thus causing premature timeout of the address. The bug is now
3656 PH/20 Added hosts_avoid_pipelining to the smtp transport.
3658 PH/21 Long custom messages for fakedefer and fakereject are now split up
3659 into multiline responses in the same way that messages for "deny" and
3660 other ACL rejections are.
3662 PH/22 Applied Jori Hamalainen's speed-up changes and typo fixes to exigrep,
3663 with slight modification.
3665 PH/23 Applied sieve patches from the maintainer "tracking the latest notify
3666 draft, changing the syntax and factoring some duplicate code".
3668 PH/24 When the log selector "outgoing_port" was set, the port was shown as -1
3669 for deliveries of the second and subsequent messages over the same SMTP
3672 PH/25 Applied Magnus Holmgren's patch for ${addresses, ${map, ${filter, and
3673 ${reduce, with only minor "tidies".
3675 SC/02 Applied Daniel Tiefnig's patch to improve the '($parent) =' pattern match.
3677 PH/26 Added a "continue" ACL modifier that does nothing, for the benefit of its
3678 expansion side effects.
3680 PH/27 When a message times out after an over-quota error from an Exim-imposed
3681 quota, the bounce message says "mailbox is full". This message was not
3682 being given when it was a system quota that was exceeded. It now should
3685 MH/03 Made $recipients available in local_scan(). local_scan() already has
3686 better access to the recipient list through recipients_list[], but
3687 $recipients can be useful in postmaster-provided expansion strings.
3689 PH/28 The $smtp_command and $smtp_command_argument variables were not correct
3690 in the case of a MAIL command with additional options following the
3691 address, for example: MAIL FROM:<foo@bar> SIZE=1234. The option settings
3692 were accidentally chopped off.
3694 PH/29 SMTP synchronization checks are implemented when a command is read -
3695 there is a check that no more input is waiting when there shouldn't be
3696 any. However, for some commands, a delay in an ACL can mean that it is
3697 some time before the response is written. In this time, more input might
3698 arrive, invalidly. So now there are extra checks after an ACL has run for
3699 HELO/EHLO and after the predata ACL, and likewise for MAIL and RCPT when
3700 pipelining has not been advertised.
3702 PH/30 MH's patch to allow iscntrl() characters to be list separators.
3704 PH/31 Unlike :fail:, a custom message specified with :defer: was not being
3705 returned in the SMTP response when smtp_return_error_details was false.
3706 This has been fixed.
3708 PH/32 Change the Dovecot authenticator to use read() and write() on the socket
3709 instead of the C I/O that was originally supplied, because problems were
3710 reported on Solaris.
3712 PH/33 Compile failed with OpenSSL 0.9.8e. This was due to a coding error in
3713 Exim which did not show up earlier: it was assuming that a call to
3714 SSL_CTX_set_info_callback() might give an error value. In fact, there is
3715 no error. In previous releases of OpenSSL, SSL_CTX_set_info_callback()
3716 was a macro that became an assignment, so it seemed to work. This has
3717 changed to a proper function call with a void return, hence the compile
3718 error. Exim's code has been fixed.
3720 PH/34 Change HDA_SIZE in oracle.c from 256 to 512. This is needed for 64-bit
3723 PH/35 Applied a patch from the Sieve maintainer which fixes a bug in "notify".
3725 PH/36 Applied John Jetmore's patch to add -v functionality to exigrep.
3727 PH/37 If a message is not accepted after it has had an id assigned (e.g.
3728 because it turns out to be too big or there is a timeout) there is no
3729 "Completed" line in the log. When some messages of this type were
3730 selected by exigrep, they were listed as "not completed". Others were
3731 picked up by some special patterns. I have improved the selection
3732 criteria to be more general.
3734 PH/38 The host_find_failed option in the manualroute router can now be set
3735 to "ignore", to completely ignore a host whose IP address cannot be
3736 found. If all hosts are ignored, the behaviour is controlled by the new
3737 host_all_ignored option.
3739 PH/39 In a list of hosts for manualroute, if one item (either because of multi-
3740 homing or because of multiple MX records with /mx) generated more than
3741 one IP address, and the following item turned out to be the local host,
3742 all the secondary addresses of the first item were incorrectly removed
3743 from the list, along with the local host and any following hosts (which
3744 is what is supposed to happen).
3746 PH/40 When Exim receives a message, it writes the login name, uid, and gid of
3747 whoever called Exim into the -H file. In the case of the daemon it was
3748 behaving confusingly. When first started, it used values for whoever
3749 started the daemon, but after a SIGHUP it used the Exim user (because it
3750 calls itself on a restart). I have changed the code so that it now always
3753 PH/41 (Following a suggestion from Tony Finch) If all the RCPT commands in a
3754 message are rejected with the same error (e.g. no authentication or bad
3755 sender address), and a DATA command is nevertheless sent (as can happen
3756 with PIPELINING or a stupid MUA), the error message that was given to the
3757 RCPT commands is included in the rejection of the DATA command. This is
3758 intended to be helpful for MUAs that show only the final error to their
3761 PH/42 Another patch from the Sieve maintainer.
3763 SC/02 Eximstats - Differentiate between permanent and temporary rejects.
3764 Eximstats - Fixed some broken HTML links and added missing column headers
3766 Eximstats - Fixed Grand Total Summary Domains, Edomains, and Email
3767 columns for Rejects, Temp Rejects, Ham, and Spam rows.
3769 SC/03 Eximstats - V1.58 Fix to get <> and blackhole to show in edomain tables.
3771 PH/43 Yet another patch from the Sieve maintainer.
3773 PH/44 I found a way to check for a TCP/IP connection going away before sending
3774 the response to the final '.' that terminates a message, but only in the
3775 case where the client has not sent further data following the '.'
3776 (unfortunately, this is allowed). However, in many cases there won't be
3777 any further data because there won't be any more messages to send. A call
3778 to select() can be used: if it shows that the input is "ready", there is
3779 either input waiting, or the socket has been closed. An attempt to read
3780 the next input character can distinguish the two cases. Previously, Exim
3781 would have sent an OK response which the client would never have see.
3782 This could lead to message repetition. This fix should cure that, at
3783 least in a lot of common cases.
3785 PH/45 Do not advertise STARTTLS in response to HELP unless it would be
3786 advertised in response to EHLO.
3792 PH/01 Two more bugs that were introduced by 4.64/PH/07, in addition to the one
3793 fixed by 4.65/MH/01 (is this a record?) are fixed:
3795 (i) An empty string was always treated as zero by the numeric comparison
3796 operators. This behaviour has been restored.
3798 (ii) It is documented that the numeric comparison operators always treat
3799 their arguments as decimal numbers. This was broken in that numbers
3800 starting with 0 were being interpreted as octal.
3802 While fixing these problems I realized that there was another issue that
3803 hadn't been noticed. Values of message_size_limit (both the global option
3804 and the transport option) were treated as octal if they started with 0.
3805 The documentation was vague. These values are now always treated as
3806 decimal, and I will make that clear in the documentation.
3812 TK/01 Disable default definition of HAVE_LINUX_SENDFILE. Clashes with
3813 Linux large file support (_FILE_OFFSET_BITS=64) on older glibc
3816 MH/01 Don't check that the operands of numeric comparison operators are
3817 integers when their expansion is in "skipping" mode (fixes bug
3818 introduced by 4.64-PH/07).
3820 PH/01 If a system filter or a router generates more than SHRT_MAX (32767)
3821 child addresses, Exim now panics and dies. Previously, because the count
3822 is held in a short int, deliveries were likely to be lost. As such a
3823 large number of recipients for a single message is ridiculous
3824 (performance will be very, very poor), I have chosen to impose a limit
3825 rather than extend the field.
3831 TK/01 Bugzilla #401. Fix DK spooling code so that it can overwrite a
3832 leftover -K file (the existence of which was triggered by #402).
3833 While we were at it, introduced process PID as part of the -K
3834 filename. This should rule out race conditions when creating
3837 TK/02 Bugzilla #402. Apply patch from Simon Arlott, speeding up DK signing
3838 processing considerably. Previous code took too long for large mails,
3839 triggering a timeout which in turn triggers #401.
3841 TK/03 Introduced HAVE_LINUX_SENDFILE to os.h-Linux. Currently only used
3842 in the DK code in transports.c. sendfile() is not really portable,
3843 hence the _LINUX specificness.
3845 TF/01 In the add_headers option to the mail command in an Exim filter,
3846 there was a bug that Exim would claim a syntax error in any
3847 header after the first one which had an odd number of characters
3850 PH/01 If a server that rejects MAIL FROM:<> was the target of a sender
3851 callout verification, Exim cached a "reject" for the entire domain. This
3852 is correct for most verifications, but it is not correct for a recipient
3853 verification with use_sender or use_postmaster set, because in that case
3854 the callout does not use MAIL FROM:<>. Exim now distinguishes the special
3855 case of MAIL FROM:<> rejection from other early rejections (e.g.
3856 rejection of HELO). When verifying a recipient using a non-null MAIL
3857 address, the cache is ignored if it shows MAIL FROM:<> rejection.
3858 Whatever the result of the callout, the value of the domain cache is
3859 left unchanged (for any other kind of callout, getting as far as trying
3860 RCPT means that the domain itself is ok).
3862 PH/02 Tidied a number of unused variable and signed/unsigned warnings that
3865 PH/03 On Solaris, an unexpectedly close socket (dropped connection) can
3866 manifest itself as EPIPE rather than ECONNECT. When tidying away a
3867 session, the daemon ignores ECONNECT errors and logs others; it now
3868 ignores EPIPE as well.
3870 PH/04 Applied Nico Erfurth's refactoring patch to tidy up mime.c
3871 (quoted-printable decoding).
3873 PH/05 Applied Nico Erfurth's refactoring patch to tidy up spool_mbox.c, and
3874 later the small subsequent patch to fix an introduced bug.
3876 PH/06 Installed the latest Cygwin Makefile from the Cygwin maintainer.
3878 PH/07 There was no check for overflow in expansions such as ${if >{1}{4096M}}.
3880 PH/08 An error is now given if message_size_limit is specified negative.
3882 PH/09 Applied and tidied up Jakob Hirsch's patch for allowing ACL variables
3883 to be given (somewhat) arbitrary names.
3885 JJ/01 exipick 20060919.0, allow for arbitrary acl_ variables introduced
3888 JJ/02 exipick 20060919.0, --show-vars args can now be regular expressions,
3889 miscellaneous code fixes
3891 PH/10 Added the log_reject_target ACL modifier to specify where to log
3894 PH/11 Callouts were setting the name used for EHLO/HELO from $smtp_active_
3895 hostname. This is wrong, because it relates to the incoming message (and
3896 probably the interface on which it is arriving) and not to the outgoing
3897 callout (which could be using a different interface). This has been
3898 changed to use the value of the helo_data option from the smtp transport
3899 instead - this is what is used when a message is actually being sent. If
3900 there is no remote transport (possible with a router that sets up host
3901 addresses), $smtp_active_hostname is used.
3903 PH/12 Installed Andrey Panin's patch to add a dovecot authenticator. Various
3904 tweaks were necessary in order to get it to work (see also 21 below):
3905 (a) The code assumed that strncpy() returns a negative number on buffer
3906 overflow, which isn't the case. Replaced with Exim's string_format()
3908 (b) There were several signed/unsigned issues. I just did the minimum
3909 hacking in of casts. There is scope for a larger refactoring.
3910 (c) The code used strcasecmp() which is not a standard C function.
3911 Replaced with Exim's strcmpic() function.
3912 (d) The code set only $1; it now sets $auth1 as well.
3913 (e) A simple test gave the error "authentication client didn't specify
3914 service in request". It would seem that Dovecot has changed its
3915 interface. Fortunately there's a specification; I followed it and
3916 changed what the client sends and it appears to be working now.
3918 PH/13 Added $message_headers_raw to provide the headers without RFC 2047
3921 PH/14 Corrected misleading output from -bv when -v was also used. Suppose the
3922 address A is aliased to B and C, where B exists and C does not. Without
3923 -v the output is "A verified" because verification stops after a
3924 successful redirection if more than one address is generated. However,
3925 with -v the child addresses are also verified. Exim was outputting "A
3926 failed to verify" and then showing the successful verification for C,
3927 with its parentage. It now outputs "B failed to verify", showing B's
3928 parentage before showing the successful verification of C.
3930 PH/15 Applied Michael Deutschmann's patch to allow DNS black list processing to
3931 look up a TXT record in a specific list after matching in a combined
3934 PH/16 It seems that the options setting for the resolver (RES_DEFNAMES and
3935 RES_DNSRCH) can affect the behaviour of gethostbyname() and friends when
3936 they consult the DNS. I had assumed they would set it the way they
3937 wanted; and indeed my experiments on Linux seem to show that in some
3938 cases they do (I could influence IPv6 lookups but not IPv4 lookups).
3939 To be on the safe side, however, I have now made the interface to
3940 host_find_byname() similar to host_find_bydns(), with an argument
3941 containing the DNS resolver options. The host_find_byname() function now
3942 sets these options at its start, just as host_find_bydns() does. The smtp
3943 transport options dns_qualify_single and dns_search_parents are passed to
3944 host_find_byname() when gethostbyname=TRUE in this transport. Other uses
3945 of host_find_byname() use the default settings of RES_DEFNAMES
3946 (qualify_single) but not RES_DNSRCH (search_parents).
3948 PH/17 Applied (a modified version of) Nico Erfurth's patch to make
3949 spool_read_header() do less string testing, by means of a preliminary
3950 switch on the second character of optional "-foo" lines. (This is
3951 overdue, caused by the large number of possibilities that now exist.
3952 Originally there were few.) While I was there, I also converted the
3953 str(n)cmp tests so they don't re-test the leading "-" and the first
3954 character, in the hope this might squeeze out yet more improvement.
3956 PH/18 Two problems with "group" syntax in header lines when verifying: (1) The
3957 flag allowing group syntax was set by the header_syntax check but not
3958 turned off, possible causing trouble later; (2) The flag was not being
3959 set at all for the header_verify test, causing "group"-style headers to
3960 be rejected. I have now set it in this case, and also caused header_
3961 verify to ignore an empty address taken from a group. While doing this, I
3962 came across some other cases where the code for allowing group syntax
3963 while scanning a header line wasn't quite right (mostly, not resetting
3964 the flag correctly in the right place). These bugs could have caused
3965 trouble for malformed header lines. I hope it is now all correct.
3967 PH/19 The functions {pwcheck,saslauthd}_verify_password() are always called
3968 with the "reply" argument non-NULL. The code, however (which originally
3969 came from elsewhere) had *some* tests for NULL when it wrote to *reply,
3970 but it didn't always do it. This confused somebody who was copying the
3971 code for some other use. I have removed all the tests.
3973 PH/20 It was discovered that the GnuTLS code had support for RSA_EXPORT, a
3974 feature that was used to support insecure browsers during the U.S. crypto
3975 embargo. It requires special client support, and Exim is probably the
3976 only MTA that supported it -- and would never use it because real RSA is
3977 always available. This code has been removed, because it had the bad
3978 effect of slowing Exim down by computing (never used) parameters for the
3979 RSA_EXPORT functionality.
3981 PH/21 On the advice of Timo Sirainen, added a check to the dovecot
3982 authenticator to fail if there's a tab character in the incoming data
3983 (there should never be unless someone is messing about, as it's supposed
3984 to be base64-encoded). Also added, on Timo's advice, the "secured" option
3985 if the connection is using TLS or if the remote IP is the same as the
3986 local IP, and the "valid-client-cert option" if a client certificate has
3989 PH/22 As suggested by Dennis Davis, added a server_condition option to *all*
3990 authenticators. This can be used for authorization after authentication
3991 succeeds. (In the case of plaintext, it servers for both authentication
3994 PH/23 Testing for tls_required and lost_connection in a retry rule didn't work
3995 if any retry times were supplied.
3997 PH/24 Exim crashed if verify=helo was activated during an incoming -bs
3998 connection, where there is no client IP address to check. In this
3999 situation, the verify now always succeeds.
4001 PH/25 Applied John Jetmore's -Mset patch.
4003 PH/26 Added -bem to be like -Mset, but loading a message from a file.
4005 PH/27 In a string expansion for a processed (not raw) header when multiple
4006 headers of the same name were present, leading whitespace was being
4007 removed from all of them, but trailing whitespace was being removed only
4008 from the last one. Now trailing whitespace is removed from each header
4009 before concatenation. Completely empty headers in a concatenation (as
4010 before) are ignored.
4012 PH/28 Fixed bug in backwards-compatibility feature of PH/09 (thanks to John
4013 Jetmore). It would have mis-read ACL variables from pre-4.61 spool files.
4015 PH/29 [Removed. This was a change that I later backed out, and forgot to
4016 correct the ChangeLog entry (that I had efficiently created) before
4017 committing the later change.]
4019 PH/30 Exim was sometimes attempting to deliver messages that had suffered
4020 address errors (4xx response to RCPT) over the same connection as other
4021 messages routed to the same hosts. Such deliveries are always "forced",
4022 so retry times are not inspected. This resulted in far too many retries
4023 for the affected addresses. The effect occurred only when there were more
4024 hosts than the hosts_max_try setting in the smtp transport when it had
4025 the 4xx errors. Those hosts that it had tried were not added to the list
4026 of hosts for which the message was waiting, so if all were tried, there
4027 was no problem. Two fixes have been applied:
4029 (i) If there are any address or message errors in an SMTP delivery, none
4030 of the hosts (tried or untried) are now added to the list of hosts
4031 for which the message is waiting, so the message should not be a
4032 candidate for sending over the same connection that was used for a
4033 successful delivery of some other message. This seems entirely
4034 reasonable: after all the message is NOT "waiting for some host".
4035 This is so "obvious" that I'm not sure why it wasn't done
4036 previously. Hope I haven't missed anything, but it can't do any
4037 harm, as the worst effect is to miss an optimization.
4039 (ii) If, despite (i), such a delivery is accidentally attempted, the
4040 routing retry time is respected, so at least it doesn't keep
4041 hammering the server.
4043 PH/31 Installed Andrew Findlay's patch to close the writing end of the socket
4044 in ${readsocket because some servers need this prod.
4046 PH/32 Added some extra debug output when updating a wait-xxx database.
4048 PH/33 The hint "could be header name not terminated by colon", which has been
4049 given for certain expansion errors for a long time, was not being given
4050 for the ${if def:h_colon_omitted{... case.
4052 PH/34 The spec says: "With one important exception, whenever a domain list is
4053 being scanned, $domain contains the subject domain." There was at least
4054 one case where this was not true.
4056 PH/35 The error "getsockname() failed: connection reset by peer" was being
4057 written to the panic log as well as the main log, but it isn't really
4058 panic-worthy as it just means the connection died rather early on. I have
4059 removed the panic log writing for the ECONNRESET error when getsockname()
4062 PH/36 After a 4xx response to a RCPT error, that address was delayed (in queue
4063 runs only) independently of the message's sender address. This meant
4064 that, if the 4xx error was in fact related to the sender, a different
4065 message to the same recipient with a different sender could confuse
4066 things. In particular, this can happen when sending to a greylisting
4067 server, but other circumstances could also provoke similar problems.
4068 I have changed the default so that the retry time for these errors is now
4069 based a combination of the sender and recipient addresses. This change
4070 can be overridden by setting address_retry_include_sender=false in the
4073 PH/37 For LMTP over TCP/IP (the smtp transport), error responses from the
4074 remote server are returned as part of bounce messages. This was not
4075 happening for LMTP over a pipe (the lmtp transport), but now it is the
4076 same for both kinds of LMTP.
4078 PH/38 Despite being documented as not happening, Exim was rewriting addresses
4079 in header lines that were in fact CNAMEs. This is no longer the case.
4081 PH/39 If -R or -S was given with -q<time>, the effect of -R or -S was ignored,
4082 and queue runs started by the daemon processed all messages. This has
4083 been fixed so that -R and -S can now usefully be given with -q<time>.
4085 PH/40 Import PCRE release 6.7 (fixes some bugs).
4087 PH/41 Add bitwise logical operations to eval (courtesy Brad Jorsch).
4089 PH/42 Give an error if -q is specified more than once.
4091 PH/43 Renamed the variables $interface_address and $interface_port as
4092 $received_ip_address and $received_port, to make it clear that these
4093 values apply to message reception, and not to the outgoing interface when
4094 a message is delivered. (The old names remain recognized, of course.)
4096 PH/44 There was no timeout on the connect() call when using a Unix domain
4097 socket in the ${readsocket expansion. There now is.
4099 PH/45 Applied a modified version of Brad Jorsch's patch to allow "message" to
4100 be meaningful with "accept".
4102 SC/01 Eximstats V1.43
4103 Bug fix for V1.42 with -h0 specified. Spotted by Chris Lear.
4105 SC/02 Eximstats V1.44
4106 Use a glob alias rather than an array ref in the generated
4107 parser. This improves both readability and performance.
4109 SC/03 Eximstats V1.45 (Marco Gaiarin / Steve Campbell)
4110 Collect SpamAssassin and rejection statistics.
4111 Don't display local sender or destination tables unless
4112 there is data to show.
4113 Added average volumes into the top table text output.
4115 SC/04 Eximstats V1.46
4116 Collect data on the number of addresses (recipients)
4117 as well as the number of messages.
4119 SC/05 Eximstats V1.47
4120 Added 'Message too big' to the list of mail rejection
4121 reasons (thanks to Marco Gaiarin).
4123 SC/06 Eximstats V1.48
4124 Mainlog lines which have GMT offsets and are too short to
4125 have a flag are now skipped.
4127 SC/07 Eximstats V1.49 (Alain Williams)
4128 Added the -emptyok flag.
4130 SC/08 Eximstats V1.50
4131 Fixes for obtaining the IP address from reject messages.
4133 JJ/03 exipick.20061117.2, made header handling as similar to exim as possible
4134 (added [br]h_ prefixes, implemented RFC2047 decoding. Fixed
4135 whitespace changes from 4.64-PH/27
4137 JJ/04 exipick.20061117.2, fixed format and added $message_headers_raw to
4140 JJ/05 exipick.20061117.2, bug fixes (error out sooner when invalid criteria
4141 are found, allow negative numbers in numeric criteria)
4143 JJ/06 exipick.20061117.2, added new $message_body_missing variable
4145 JJ/07 exipick.20061117.2, added $received_ip_address and $received_port
4146 to match changes made in 4.64-PH/43
4148 PH/46 Applied Jori Hamalainen's patch to add features to exiqsumm.
4150 PH/47 Put in an explicit test for a DNS lookup of an address record where the
4151 "domain" is actually an IP address, and force a failure. This locks out
4152 those revolvers/nameservers that support "A-for-A" lookups, in
4153 contravention of the specifications.
4155 PH/48 When a host name was looked up from an IP address, and the subsequent
4156 forward lookup of the name timed out, the host name was left in
4157 $sender_host_name, contrary to the specification.
4159 PH/49 Although default lookup types such as lsearch* or cdb*@ have always been
4160 restricted to single-key lookups, Exim was not diagnosing an error if
4161 * or *@ was used with a query-style lookup.
4163 PH/50 Increased the value of DH_BITS in tls-gnu.c from 768 to 1024.
4165 MH/01 local_scan ABI version incremented to 1.1. It should have been updated
4166 long ago, but noone interested enough thought of it. Let's just say that
4167 the "1.1" means that there are some new functions that weren't there at
4168 some point in the past.
4170 PH/51 Error processing for expansion failure of helo_data from an smtp
4171 transport during callout processing was broken.
4173 PH/52 Applied John Jetmore's patch to allow tls-on-connect and STARTTLS to be
4174 tested/used via the -bh/-bhc/-bs options.
4176 PH/53 Added missing "#include <time.h>" to pcre/pcretest.c (this was a PCRE
4177 bug, fixed in subsequent PCRE releases).
4179 PH/54 Applied Robert Bannocks' patch to avoid a problem with references that
4180 arises when using the Solaris LDAP libraries (but not with OpenLDAP).
4182 PH/55 Check for a ridiculously long file name in exim_dbmbuild.
4188 SC/01 Use a glob alias rather than an array ref in eximstats generated
4189 parser. This improves both readability and performance.
4191 SC/02 Collect SpamAssassin and rejection statistics in eximstats.
4192 Don't display local sender or destination tables in eximstats unless
4193 there is data to show.
4194 Added average volumes into the eximstats top table text output.
4196 SC/03 Collect data on the number of addresses (recipients) as well
4197 as the number of messages in eximstats.
4199 TF/01 Correct an error in the documentation for the redirect router. Exim
4200 does (usually) call initgroups() when daemonizing.
4202 TF/02 Call initgroups() when dropping privilege in exim.c, so that Exim runs
4203 with consistent privilege compared to when running as a daemon.
4205 TF/03 Note in the spec that $authenticated_id is not set for local
4206 submissions from trusted users.
4208 TF/04 The ratelimit per_rcpt option now works correctly in acl_not_smtp.
4209 Thanks to Dean Brooks <dean@iglou.com> for the patch.
4211 TF/05 Make it easier to get SMTP authentication and TLS/SSL support working
4212 by adding some example configuration directives to the default
4213 configuration file. A little bit of work is required to uncomment the
4214 directives and define how usernames and passwords are checked, but
4215 there is now a framework to start from.
4217 PH/01 Added #define LDAP_DEPRECATED 1 to ldap.c because some of the "old"
4218 functions that Exim currently uses aren't defined in ldap.h for OpenLDAP
4219 without this. I don't know how relevant this is to other LDAP libraries.
4221 PH/02 Add the verb name to the "unknown ACL verb" error.
4223 PH/03 Magnus Holmgren's patch for filter_prepend_home.
4225 PH/03 Fixed Bugzilla #101: macro definition between ACLs doesn't work.
4227 PH/04 Applied Magnus Holmgren's patch to fix Bugzilla #98: transport's home
4228 directory not expanded when it should be if an expanded home directory
4229 was set for the address (which is overridden by the transport).
4231 PH/05 Applied Alex Kiernan's patch to fix Bugzilla #99: a problem with
4234 PH/06 Added acl_not_smtp_start, based on Johannes Berg's patch, and set the
4235 bit to forbid control=suppress_local_fixups in the acl_not_smtp ACL,
4236 because it is too late at that time, and has no effect.
4238 PH/07 Changed ${quote_pgsql to quote ' as '' instead of \' because of a
4239 security issue with \' (bugzilla #107). I could not use the
4240 PQescapeStringConn() function, because it needs a PGconn value as one of
4243 PH/08 When testing addresses using -bt, indicate those final addresses that
4244 are duplicates that would not cause an additional delivery. At least one
4245 person was confused, thinking that -bt output corresponded to deliveries.
4246 (Suppressing duplicates isn't a good idea as you lose the information
4247 about possibly different redirections that led to the duplicates.)
4249 PH/09 Applied patch from Erik to use select() instead of poll() in spam.c on
4250 systems where poll() doesn't work, in particular OS X.
4252 PH/10 Added more information to debugging output for retry time not reached.
4254 PH/11 Applied patch from Arkadiusz Miskiewicz to apply a timeout to read
4255 operations in malware.c.
4257 PH/12 Applied patch from Magnus Holmgren to include the "h" tag in Domain Keys
4260 PH/13 If write_rejectlog was set false when logging was sent to syslog with
4261 syslog_duplication set false, log lines that would normally be written
4262 both the the main log and to the reject log were not written to syslog at
4265 PH/14 In the default configuration, change the use of "message" in ACL warn
4266 statements to "add_header".
4268 PH/15 Diagnose a filter syntax error for "seen", "unseen", or "noerror" if not
4269 not followed by a command (e.g. "seen endif").
4271 PH/16 Recognize SMTP codes at the start of "message" in ACLs and after :fail:
4272 and :defer: in a redirect router. Add forbid_smtp_code to suppress the
4275 PH/17 Added extra conditions to the default value of delay_warning_condition
4279 { !eq{$h_list-id:$h_list-post:$h_list-subscribe:}{} } \
4280 { match{$h_precedence:}{(?i)bulk|list|junk} } \
4281 { match{$h_auto-submitted:}{(?i)auto-generated|auto-replied} } \
4284 The Auto-Submitted: and various List- headers are standardised, whereas I
4285 don't think Precedence: ever was.
4287 PH/18 Refactored debugging code in route_finduser() to show more information,
4288 in particular, the error code if getpwnam() issues one.
4290 PH/19 Added PQsetClientEncoding(conn, "SQL_ASCII") to the pgsql code module.
4291 This is apparently needed in addition to the PH/07 change above to avoid
4292 any possible encoding problems.
4294 PH/20 Perl can change the locale. Exim was resetting it after a ${perl call,
4295 but not after initializing Perl.
4297 PH/21 Added a call to PQsetNoticeProcessor() to catch pgsql "notices" and
4298 output them only if debugging. By default they are written stderr,
4299 apparently, which is not desirable.
4301 PH/22 Added Alain Williams' LDAP patch to support setting REFERRALS=off on
4304 JJ/01 exipick: added --reverse (and -R synonym), --random, --size, --sort and
4307 JJ/02 exipick: rewrote --help documentation to hopefully make more clear.
4309 PH/23 Made -oMaa and -oMt work with -bh and -bs to pretend the connection is
4310 authenticated or an ident call has been made. Suppress the default
4311 values for $authenticated_id and $authenticated_sender (but permit -oMai
4312 and -oMas) when testing with -bh.
4314 PH/24 Re-jigged the order of the tests in the default configuration so that the
4315 tests for valid domains and recipients precede the DNS black list and CSA
4316 tests, on the grounds that those ones are more expensive.
4318 PH/25 Exim was not testing for a space following SMTP commands such as EHLO
4319 that require one. Thus, EHLORHUBARB was interpreted as a valid command.
4320 This bug exists in every version of Exim that I still have, right back to
4323 PH/26 (n)wildlsearch lookups are documented as being done case-insensitively.
4324 However, an attempt to turn on case-sensitivity in a regex key by
4325 including (?-i) didn't work because the subject string was already
4326 lowercased, and the effects were non-intuitive. It turns out that a
4327 one-line patch can be used to allow (?-i) to work as expected.
4333 TF/01 Fix the add_header change below (4.61 PH/55) which had a bug that (amongst
4334 other effects) broke the use of negated acl sub-conditions.
4336 PH/01 ${readsocket now supports Internet domain sockets (modified John Jetmore
4339 PH/02 When tcp-wrappers is called from Exim, it returns only "deny" or "allow".
4340 "Deny" causes Exim to reject the incoming connection with a 554 error.
4341 Unfortunately, if there is a major crisis, such as a disk failure,
4342 tcp-wrappers gives "deny", whereas what one would like would be some
4343 kind of temporary error. A kludge has been added to help with this.
4344 Before calling hosts_ctl(), errno is set zero. If the result is "deny", a
4345 554 error is used if errno is still zero or contains ENOENT (which occurs
4346 if either of the /etc/hosts.{allow,deny} files is missing). Otherwise, a
4349 PH/03 Add -lutil to the default FreeBSD LIBS setting.
4351 PH/04 Change PH/19 for 4.61 was too wide. It should not be applied to host
4352 errors. Otherwise a message that provokes a temporary error (when other
4353 messages do not) can cause a whole host to time out.
4355 PH/05 Batch deliveries by appendfile and pipe transports did not work when the
4356 addresses were routed directly to files or pipes from a redirect router.
4357 File deliveries just didn't batch; pipe deliveries might have suffered
4360 PH/06 A failure to get a lock for a hints database would erroneously always say
4361 "Failed to get write lock", even when it was really a read lock.
4363 PH/07 The appendfile transport was creating MBX lock files with a fixed mode
4364 of 0600. This has been changed to use the value of the lockfile_mode
4365 option (which defaults to 0600).
4367 PH/08 Applied small patch from the Sieve maintainer.
4369 PH/09 If maildir_quota_directory_regex was set to exclude (say) the .Trash
4370 folder from quota calculations, a direct delivery into this folder messed
4371 up the contents of the maildirsize file. This was because the regex was
4372 used only to exclude .Trash (or whatever) when the size of the mailbox
4373 was calculated. There was no check that a delivery was happening into an
4374 excluded directory. This bug has been fixed by ignoring all quota
4375 processing for deliveries into excluded directories.
4377 PH/10 Added the maildirfolder_create_regex option to appendfile.
4383 PH/01 The code for finding all the local interface addresses on a FreeBSD
4384 system running IPv6 was broken. This may well have applied to all BSD
4385 systems, as well as to others that have similar system calls. The broken
4386 code found IPv4 interfaces correctly, but gave incorrect values for the
4387 IPv6 interfaces. In particular, ::1 was not found. The effect in Exim was
4388 that it would not match correctly against @[] and not recognize the IPv6
4391 PH/02 The ipliteral router was not recognizing addresses of the form user@
4392 [ipv6:....] because it didn't know about the "ipv6:" prefix.
4394 PH/03 Added disable_ipv6.
4396 PH/04 Changed $reply_address to use the raw form of the headers instead of the
4397 decoded form, because it is most often used to construct To: headers
4398 lines in autoreplies, and the decoded form may well be syntactically
4399 invalid. However, $reply_address has leading white space removed, and all
4400 newlines turned into spaces so that the autoreply transport does not
4403 PH/05 If group was specified without a user on a router, and no group or user
4404 was specified on a transport, the group from the router was ignored.
4406 PH/06 Increased the number of ACL variables to 20 of each type, and arranged
4407 for visible compile-time settings that can be used to change these
4408 numbers, for those that want even more. Backwards compatibility with old
4409 spool files has been maintained. However, going back to a previous Exim
4410 release will lost any variables that are in spool files.
4412 PH/07 Two small changes when running in the test harness: increase delay when
4413 passing a TCP/IP connection to a new process, in case the original
4414 process has to generate a bounce, and remove special handling of
4415 127.0.0.2 (sic), which is no longer necessary.
4417 PH/08 Changed debug output of dbfn_open() flags from numbers to names, so as to
4418 be the same on different OS.
4420 PH/09 Moved a debug statement in filter processing to avoid a race problem when
4423 JJ/01 exipick: fixed bug where -b (brief) output option showed "Vars:"
4424 whether --show-vars was specified or not
4426 JJ/02 exipick: Added support for new ACL variable spool format introduced
4429 PH/10 Fixed another bug related to PH/04 above: if an incoming message had a
4430 syntactically invalid From: or Reply-to: line, and a filter used this to
4431 generate an autoreply, and therefore failed to obtain an address for the
4432 autoreply, Exim could try to deliver to a non-existent relative file
4433 name, causing unrelated and misleading errors. What now happens is that
4434 it logs this as a hard delivery error, but does not attempt to create a
4437 PH/11 The exinext utility has a -C option for testing purposes, but although
4438 the given file was scanned by exinext itself; it wasn't being passed on
4439 when Exim was called.
4441 PH/12 In the smtp transport, treat an explicit ECONNRESET error the same as
4442 an end-of-file indication when reading a command response.
4444 PH/13 Domain literals for IPv6 were not recognized unless IPv6 support was
4445 compiled. In many other places in Exim, IPv6 addresses are always
4446 recognized, so I have changed this. It also means that IPv4 domain
4447 literals of the form [IPV4:n.n.n.n] are now always recognized.
4449 PH/14 When a uid/gid is specified for the queryprogram router, it cannot be
4450 used if the router is not running as root, for example, when verifying at
4451 ACL time, or when using -bh. The debugging output from this situation was
4452 non-existent - all you got was a failure to exec. I have made two
4455 (a) Failures to set uid/gid, the current directory, or a process leader
4456 in a subprocess such as that created by queryprogram now generate
4457 suitable debugging output when -d is set.
4459 (b) The queryprogram router detects when it is not running as root,
4460 outputs suitable debugging information if -d is set, and then runs
4461 the subprocess without attempting to change uid/gid.
4463 PH/15 Minor change to Makefile for building test_host (undocumented testing
4466 PH/16 As discussed on the list in Nov/Dec: Exim no longer looks at the
4467 additional section of a DNS packet that returns MX or SRV records.
4468 Instead, it always explicitly searches for A/AAAA records. This avoids
4469 major problems that occur when a DNS server includes only records of one
4470 type (A or AAAA) in an MX/SRV packet. A byproduct of this change has
4471 fixed another bug: if SRV records were looked up and the corresponding
4472 address records were *not* found in the additional section, the port
4473 values from the SRV records were lost.
4475 PH/17 If a delivery to a pipe, file, or autoreply was deferred, Exim was not
4476 using the correct key (the original address) when searching the retry
4477 rules in order to find which one to use for generating the retry hint.
4479 PH/18 If quota_warn_message contains a From: header, Exim now refrains from
4480 adding the default one. Similarly, if it contains a Reply-To: header, the
4481 errors_reply_to option, if set, is not used.
4483 PH/19 When calculating a retry time, Exim used to measure the "time since
4484 failure" by looking at the "first failed" field in the retry record. Now
4485 it does not use this if it is later than than the arrival time of the
4486 message. Instead it uses the arrival time. This makes for better
4487 behaviour in cases where some deliveries succeed, thus re-setting the
4488 "first failed" field. An example is a quota failure for a huge message
4489 when small messages continue to be delivered. Without this change, the
4490 "time since failure" will always be short, possible causing more frequent
4491 delivery attempts for the huge message than are intended.
4492 [Note: This change was subsequently modified - see PH/04 for 4.62.]
4494 PH/20 Added $auth1, $auth2, $auth3 to contain authentication data (as well as
4495 $1, $2, $3) because the numerical variables can be reset during some
4496 expansion items (e.g. "match"), thereby losing the authentication data.
4498 PH/21 Make -bV show the size of off_t variables so that the test suite can
4499 decide whether to run tests for quotas > 2G.
4501 PH/22 Test the values given for quota, quota_filecount, quota_warn_threshold,
4502 mailbox_size, and mailbox_filecount in the appendfile transport. If a
4503 filecount value is greater than 2G or if a quota value is greater than 2G
4504 on a system where the size of off_t is not greater than 4, a panic error
4507 PH/23 When a malformed item such as 1.2.3/24 appears in a host list, it can
4508 never match. The debug and -bh output now contains an explicit error
4509 message indicating a malformed IPv4 address or mask.
4511 PH/24 An host item such as 1.2.3.4/abc was being treated as the IP address
4512 1.2.3.4 without a mask. Now it is not recognized as an IP address, and
4513 PH/23 above applies.
4515 PH/25 Do not write to syslog when running in the test harness. The only
4516 occasion when this arises is a failure to open the main or panic logs
4517 (for which there is an explicit test).
4519 PH/26 Added the /no_tell option to "control=freeze".
4521 PH/27 If a host name lookup failed very early in a connection, for example, if
4522 the IP address matched host_lookup and the reverse lookup yielded a name
4523 that did not have a forward lookup, an error message of the form "no IP
4524 address found for host xxx.xxx.xxx (during SMTP connection from NULL)"
4525 could be logged. Now it outputs the IP address instead of "NULL".
4527 PH/28 An enabling patch from MH: add new function child_open_exim2() which
4528 allows the sender and the authenticated sender to be set when
4529 submitting a message from within Exim. Since child_open_exim() is
4530 documented for local_scan(), the new function should be too.
4532 PH/29 In GnuTLS, a forced expansion failure for tls_privatekey was not being
4533 ignored. In both GnuTLS and OpenSSL, an expansion of tls_privatekey that
4534 results in an empty string is now treated as unset.
4536 PH/30 Fix eximon buffer overflow bug (Bugzilla #73).
4538 PH/31 Added sender_verify_fail logging option.
4540 PH/32 In November 2003, the code in Exim that added an empty Bcc: header when
4541 needed by RFC 822 but not by RFC 2822 was commented out. I have now
4542 tidied the source and removed it altogether.
4544 PH/33 When a queue run was abandoned because the load average was too high, a
4545 log line was always written; now it is written only if the queue_run log
4546 selector is set. In addition, the log line for abandonment now contains
4547 information about the queue run such as the pid. This is always present
4548 in "start" and "stop" lines but was omitted from the "abandon" line.
4550 PH/34 Omit spaces between a header name and the colon in the error message that
4551 is given when verify = headers_syntax fails (if there are lots of them,
4552 the message gets confusing).
4554 PH/35 Change the default for dns_check_names_pattern to allow slashes within
4555 names, as there are now some PTR records that contain slashes. This check
4556 is only to protect against broken name servers that fall over on strange
4557 characters, so the fact that it applies to all lookups doesn't matter.
4559 PH/36 Now that the new test suite is complete, we can remove some of the
4560 special code in Exim that was needed for the old test suite. For example,
4561 sorting DNS records because real resolvers return them in an arbitrary
4562 order. The new test suite's fake resolver always returns records in the
4565 PH/37 When running in the test harness, use -odi for submitted messages (e.g.
4566 bounces) except when queue_only is set, to avoid logging races between
4567 the different processes.
4569 PH/38 Panic-die if .include specifies a non-absolute path.
4571 PH/39 A tweak to the "H" retry rule from its user.
4573 JJ/03 exipick: Removed parentheses from 'next' and 'last' calls that specified
4574 a label. They prevented compilation on older perls.
4576 JJ/04 exipick: Refactored code to prevent implicit split to @_ which caused
4577 a warning to be raised on newish perls.
4579 JJ/05 exipick: Fixed bug where -bpc always showed a count of all messages
4580 on queue. Changes to match documented behaviour of showing count of
4581 messages matching specified criteria.
4583 PH/40 Changed the default ident timeout from 30s to 5s.
4585 PH/41 Added support for the use of login_cap features, on those BSD systems
4586 that have them, for controlling the resources used by pipe deliveries.
4588 PH/42 The content-scanning code uses fopen() to create files in which to put
4589 message data. Previously it was not paying any attention to the mode of
4590 the files. Exim runs with umask(0) because the rest of the code creates
4591 files with open(), and sets the required mode explicitly. Thus, these
4592 files were ending up world-writeable. This was not a big issue, because,
4593 being within the spool directory, they were not world-accessible. I have
4594 created a function called modefopen, which takes an additional mode
4595 argument. It sets umask(777), creates the file, chmods it to the required
4596 mode, then resets the umask. All the relevant calls to fopen() in the
4597 content scanning code have been changed to use this function.
4599 PH/43 If retry_interval_max is set greater than 24 hours, it is quietly reset
4600 to 24 hours. This avoids potential overflow problems when processing G
4601 and H retry rules. I suspect nobody ever tinkers with this value.
4603 PH/44 Added STRIP_COMMAND=/usr/bin/strip to the FreeBSD Makefile.
4605 PH/45 When the plaintext authenticator is running as a client, the server's
4606 challenges are checked to ensure they are valid base64 strings. By
4607 default, the authentication attempt is cancelled if an invalid string is
4608 received. Setting client_ignore_invalid_base64 true ignores these errors.
4609 The decoded challenge strings are now placed in $auth1, $auth2, etc. as
4610 they are received. Thus, the responses can be made to depend on the
4611 challenges. If an invalid string is ignored, an empty string is placed in
4614 PH/46 Messages that are created by the autoreply transport now contains a
4615 References: header, in accordance with RFCs 2822 and 3834.
4617 PH/47 Added authenticated_sender_force to the smtp transport.
4619 PH/48 The ${prvs expansion was broken on systems where time_t was long long.
4621 PH/49 Installed latest patch from the Sieve maintainer.
4623 PH/50 When an Exim quota was set without a file count quota, and mailbox_size
4624 was also set, the appendfile transport was unnecessarily scanning a
4625 directory of message files (e.g. for maildir delivery) to find the count
4626 of files (along with the size), even though it did not need this
4627 information. It now does the scan only if it needs to find either the
4628 size of the count of files.
4630 PH/51 Added ${time_eval: to convert Exim time strings into seconds.
4632 PH/52 Two bugs concerned with error handling when the smtp transport is
4635 (i) Exim was not creating retry information for temporary errors given
4636 for individual recipients after the DATA command when the smtp transport
4637 was used in LMTP mode. This meant that they could be retried too
4638 frequently, and not timed out correctly.
4640 (ii) Exim was setting the flag that allows error details to be returned
4641 for LMTP errors on RCPT commands, but not for LMTP errors for individual
4642 recipients that were returned after the DATA command.
4644 PH/53 This is related to PH/52, but is more general: for any failing address,
4645 when detailed error information was permitted to be returned to the
4646 sender, but the error was temporary, then after the final timeout, only
4647 "retry timeout exceeded" was returned. Now it returns the full error as
4648 well as "retry timeout exceeded".
4650 PH/54 Added control=allow_auth_unadvertised, as it seems there are clients that
4651 do this, and (what is worse) MTAs that accept it.
4653 PH/55 Added the add_header modified to ACLs. The use of "message" with "warn"
4654 will now be deprecated.
4656 PH/56 New os.c-cygwin from the Cygwin maintainer.
4658 JJ/06 exipick: added --unsorted option to allow unsorted output in all output
4659 formats (previously only available in exim formats via -bpr, -bpru,
4660 and -bpra. Now also available in native and exiqgrep formats)
4662 JJ/07 exipick: added --freeze and --thaw options to allow faster interaction
4663 with very large, slow to parse queues
4665 JJ/08 exipick: added ! as generic prefix to negate any criteria format
4667 JJ/09 exipick: miscellaneous performance enhancements (~24% improvements)
4669 PH/57 Tidies in SMTP dialogue display in debug output: (i) It was not showing
4670 responses to authentication challenges, though it was showing the
4671 challenges; (ii) I've removed the CR characters from the debug output for
4674 PH/58 Allow for the insertion of a newline as well as a space when a string
4675 is turned into more than one encoded-word during RFC 2047 encoding. The
4676 Sieve code now uses this.
4678 PH/59 Added the following errors that can be detected in retry rules: mail_4xx,
4679 data_4xx, lost_connection, tls_required.
4681 PH/60 When a VRFY deferred or FAILED, the log message rather than the user
4682 message was being sent as an SMTP response.
4684 PH/61 Add -l and -k options to exicyclog.
4686 PH/62 When verifying, if an address was redirected to one new address, so that
4687 verification continued, and the new address failed or deferred after
4688 having set something in $address_data, the value of $address_data was not
4689 passed back to the ACL. This was different to the case when no
4690 redirection occurred. The value is now passed back in both cases.
4692 PH/63 Changed the macro HAVE_LOGIN_CAP (see PH/41 for this release above) to
4693 HAVE_SETCLASSRESOURCES because there are different APIs in use that all
4694 use login_cap.h, so on its own it isn't the distinguishing feature. The
4695 new name refers directly to the setclassresources() function.
4697 PH/65 Added configuration files for NetBSD3.
4699 PH/66 Updated OS/Makefile-HP-UX for gcc 4.1.0 with HP-UX 11.
4701 PH/67 Fixed minor infelicity in the sorting of addresses to ensure that IPv6
4702 is preferred over IPv4.
4704 PH/68 The bounce_return_message and bounce_return_body options were not being
4705 honoured for bounces generated during the reception of non-SMTP messages.
4706 In particular, this applied to messages rejected by the ACL. This bug has
4707 been fixed. However, if bounce_return_message is true and bounce_return_
4708 body is false, the headers that are returned for a non-SMTP message
4709 include only those that have been read before the error was detected.
4710 (In the case of an ACL rejection, they have all been read.)
4712 PH/69 The HTML version of the specification is now built in a directory called
4713 spec_html instead of spec.html, because the latter looks like a path with
4714 a MIME-type, and this confuses some software.
4716 PH/70 Catch two compiler warnings in sieve.c.
4718 PH/71 Fixed an obscure and subtle bug (thanks Alexander & Matthias). The
4719 function verify_get_ident() calls ip_connect() to connect a socket, but
4720 if the "connect()" function timed out, ip_connect() used to close the
4721 socket. However, verify_get_ident() also closes the socket later, and in
4722 between Exim writes to the log, which may get opened at this point. When
4723 the socket was closed in ip_connect(), the log could get the same file
4724 descriptor number as the socket. This naturally causes chaos. The fix is
4725 not to close the socket in ip_connect(); the socket should be closed by
4726 the function that creates it. There was only one place in the code where
4727 this was missing, in the iplookup router, which I don't think anybody now
4728 uses, but I've fixed it anyway.
4730 PH/72 Make dns_again_means_nonexist apply to lookups using gethostbyname() as
4731 well as to direct DNS lookups. Otherwise the handling of names in host
4732 lists is inconsistent and therefore confusing.
4738 PH/01 Two changes to the default runtime configuration:
4740 (1) Move the checks for relay_from_hosts and authenticated clients from
4741 after to before the (commented out) DNS black list checks.
4743 (2) Add control=submission to the relay_from_hosts and authenticated
4744 clients checks, on the grounds that messages accepted by these
4745 statements are most likely to be submissions.
4747 PH/02 Several tidies to the handling of ${prvs and ${prvscheck:
4749 (1) Generate an error if the third argument for the ${prvs expansion is
4752 (2) Treat a missing third argument of ${prvscheck as if it were an empty
4755 (3) Reset the variables that are obtained from the first argument of
4756 ${prvscheck and used in the second argument before leaving the code,
4757 because their memory is reclaimed, so using them afterwards may do
4760 (4) Tidy up the code for expanding the arguments of ${prvscheck one by
4761 one (it's much easier than Tom thought :-).
4763 (5) Because of (4), we can now allow for the use of $prvscheck_result
4764 inside the third argument.
4766 PH/03 For some reason, the default setting of PATH when running a command from
4767 a pipe transport was just "/usr/bin". I have changed it to
4770 PH/04 SUPPORT_TRANSLATE_IP_ADDRESS and MOVE_FROZEN_MESSAGES did not cause
4771 anything to be listed in the output from -bV.
4773 PH/05 When a filter generated an autoreply, the entire To: header line was
4774 quoted in the delivery log line, like this:
4776 => >A.N.Other <ano@some.domain> <original@ddress> ...
4778 This has been changed so that it extracts the operative address. There
4779 may be more than one such address. If so, they are comma-separated, like
4782 => >ano@some.domain,ona@other.domain <original@ddress> ...
4784 PH/06 When a client host used a correct literal IP address in a HELO or EHLO
4785 command, (for example, EHLO [1.2.3.4]) and the client's IP address was
4786 not being looked up in the rDNS to get a host name, Exim was showing the
4787 IP address twice in Received: lines, even though the IP addresses were
4788 identical. For example:
4790 Received: from [1.2.3.4] (helo=[1.2.3.4])
4792 However, if the real host name was known, it was omitting the HELO data
4793 if it matched the actual IP address. This has been tidied up so that it
4794 doesn't show the same IP address twice.
4796 PH/07 When both +timestamp and +memory debugging was on, the value given by
4797 $tod_xxx expansions could be wrong, because the tod_stamp() function was
4798 called by the debug printing, thereby overwriting the timestamp buffer.
4799 Debugging no longer uses the tod_stamp() function when +timestamp is set.
4801 PH/08 When the original message was included in an autoreply transport, it
4802 always said "this is a copy of the message, including all the headers",
4803 even if body_only or headers_only was set. It now gives an appropriate
4806 PH/09 Applied a patch from the Sieve maintainer which:
4808 o fixes some comments
4809 o adds the (disabled) notify extension core
4810 o adds some debug output for the result of if/elsif tests
4811 o points to the current vacation draft in the documentation
4812 and documents the missing references header update
4816 o fixes a bug in processing the envelope test (when testing
4817 multiple envelope elements, the last element determined the
4820 PH/10 Exim was violating RFC 3834 ("Recommendations for Automatic Responses to
4821 Electronic Mail") by including:
4823 Auto-submitted: auto-generated
4825 in the messages that it generates (bounce messages and others, such as
4826 warnings). In the case of bounce messages for non-SMTP messages, there was
4827 also a typo: it was using "Auto_submitted" (underscore instead of
4828 hyphen). Since every message generated by Exim is necessarily in response
4829 to another message, thes have all been changed to:
4831 Auto-Submitted: auto-replied
4833 in accordance with these statements in the RFC:
4835 The auto-replied keyword:
4837 - SHOULD be used on messages sent in direct response to another
4838 message by an automatic process,
4840 - MUST NOT be used on manually-generated messages,
4842 - MAY be used on Delivery Status Notifications (DSNs) and Message
4843 Disposition Notifications (MDNs),
4845 - MUST NOT be used on messages generated by automatic or periodic
4846 processes, except for messages which are automatic responses to
4849 PH/11 Added "${if def:sender_address {(envelope-from <$sender_address>)\n\t}}"
4850 to the default Received: header definition.
4852 PH/12 Added log selector acl_warn_skipped (default on).
4854 PH/13 After a successful wildlsearch lookup, discard the values of numeric
4855 variables because (a) they are in the wrong storage pool and (b) even if
4856 they were copied, it wouldn't work properly because of the caching.
4858 PH/14 Add check_rfc2047_length to disable enforcement of RFC 2047 length
4859 checking when decoding. Apparently there are clients that generate
4860 overlong encoded strings. Why am I not surprised?
4862 PH/15 If the first argument of "${if match_address" was not empty, but did not
4863 contain an "@" character, Exim crashed. Now it writes a panic log message
4864 and treats the condition as false.
4866 PH/16 In autoreply, treat an empty string for "once" the same as unset.
4868 PH/17 A further patch from the Sieve maintainer: "Introduce the new Sieve
4869 extension "envelope-auth". The code is finished and in agreement with
4870 other implementations, but there is no documentation so far and in fact,
4871 nobody wrote the draft yet. This extension is currently #undef'ed, thus
4872 not changing the active code.
4874 Print executed "if" and "elsif" statements when debugging is used. This
4875 helps a great deal to understand what a filter does.
4877 Document more things not specified clearly in RFC3028. I had all this
4878 sorted out, when out of a sudden new issues came to my mind. Oops."
4880 PH/18 Exim was not recognizing the "net-" search type prefix in match_ip lists
4883 PH/19 Exim expands the IPv6 address given to -bh to its full non-abbreviated
4884 canonical form (as documented). However, after a host name lookup from
4885 the IP address, check_host() was doing a simple string comparison with
4886 addresses acquired from the DNS when checking that the found name did
4887 have the original IP as one of its addresses. Since any found IPv6
4888 addresses are likely to be in abbreviated form, the comparison could
4889 fail. Luckily, there already exists a function for doing the comparison
4890 by converting both addresses to binary, so now that is used instead of
4891 the text comparison.
4893 PH/20 There was another similar case to PH/19, when a complete host name was
4894 given in a host list; looking up its IP address could give an abbreviated
4895 form, whereas the current host's name might or might not be abbreviated.
4896 The same fix has been applied.
4902 PH/01 The ${base62: operator adjusted itself to base 36 when BASE_62 was
4903 set to 36 (for Darwin and Cygwin), but the ${base62d: operator did not.
4906 PH/02 Two minor problems detected in Cygwin: the os.{c,h} files had lost */ on
4907 the CVS lines, and there was a missing #if HAVE_IPV6 in host.c.
4909 PH/03 Typo: missing ".o" in src/pcre/Makefile.
4911 PH/04 Tighten up "personal" tests: Instead of testing for any "List-"
4912 header line, restrict the check to what is listed in RFCs 2369 and 2929.
4913 Also, for "Auto-Submitted", treat anything other than "no" as
4914 non-personal, in accordance with RFC 3834. (Previously it treated
4915 anything starting "auto-" as non-personal.)
4917 TF/01 The control=submission/name=... option had a problem with syntax
4918 errors if the name included a slash character. The /name= option
4919 now slurps the rest of the string, so it can include any characters
4920 but it must come last in the list of options (after /sender_retain
4923 PH/05 Some modifications to the interface to the fake nameserver for the new
4931 TK/01 Added the "success_on_redirect" address verification option. See
4932 NewStuff for rationale and an example.
4934 PH/01 Added support for SQLite, basic code supplied by David Woodhouse.
4936 PH/02 Patch to exigrep to allow it to work on syslog lines.
4938 PH/03 When creating an mbox file for a virus/spam scan, use fseek() instead of
4939 fread() to skip over the body file's header line, because in Cygwin the
4940 header line is locked and is inaccessible.
4942 PH/04 Added $message_exim_id, ultimately to replace $message_id (they will both
4943 co-exist for some time) to make it clear that it is the Exim ID that is
4944 referenced, not the Message-ID: header line.
4946 PH/05 Replaced all Tom's calls to snprintf() with calls to the internal
4947 string_format() function, because snprintf() does not exist on all
4950 PH/06 The use of forbid_filter_existstest now also locks out the use of the
4951 ${stat: expansion item.
4953 PH/07 Changed "SMTP protocol violation: synchronization error" into "SMTP
4954 protocol synchronization error", to keep the pedants happy.
4956 PH/08 Arrange for USE_INET_NTOA_FIX to be set in config.h for AIX systems as
4957 well as for IRIX systems, when gcc is being used. See the host.c source
4960 PH/09 Installed latest Cygwin configuration files from the Cygwin maintainer.
4962 PH/10 Named domain lists were not working if used in a queue_smtp_domains
4965 PH/11 Added support for the IGNOREQUOTA extension to LMTP, both to the lmtp
4966 transport and to the smtp transport in LMTP mode.
4968 TK/02 Remove one case of BASE64 error detection FTTB (undocumented anyway).
4970 PH/12 There was a missing call to search_tidyup() before the fork() in rda.c to
4971 run a filter in a subprocess. This could lead to confusion in subsequent
4972 lookups in the parent process. There should also be a search_tidyup() at
4973 the end of the subprocess.
4975 PH/13 Previously, if "verify = helo" was set in an ACL, the condition was true
4976 only if the host matched helo_try_verify_hosts, which caused the
4977 verification to occur when the EHLO/HELO command was issued. The ACL just
4978 tested the remembered result. Now, if a previous verification attempt has
4979 not happened, "verify = helo" does it there and then.
4981 JJ/01 exipick: added $message_exim_id variable (see 4.53-PH/04)
4983 TK/03 Fix log output including CR from clamd.
4985 PH/14 A reference to $reply_address when Reply-to: was empty and From: did not
4986 exist provoked a memory error which could cause a segfault.
4988 PH/15 Installed PCRE 6.2
4990 PH/17 Defined BIND_8_COMPAT in the Darwin os.h file.
4992 PH/18 Reversed 4.52/PH/17 because the HP-UX user found it wasn't the cause
4993 of the problem. Specifically, suggested +O2 rather than +O1 for the
4996 PH/19 Added sqlite_lock_timeout option (David Woodhouse's patch).
4998 PH/20 If a delivery was routed to a non-standard port by means of an SRV
4999 record, the port was not correctly logged when the outgoing_port log
5000 selector was set (it logged the transort's default port).
5002 PH/21 Added support for host-specific ports to manualroute, queryprogram,
5003 fallback_hosts, and "hosts" in the smtp transport.
5005 PH/22 If the log selector "outgoing_port" is set, the port is now also given on
5006 host errors such as "Connection refused".
5008 PH/23 Applied a patch to fix problems with exim-4.52 while doing radius
5009 authentication with radiusclient 0.4.9:
5011 - Error returned from rc_read_config was caught wrongly
5012 - Username/password not passed on to radius server due to wrong length.
5014 The presumption is that some radiusclient API changes for 4.51/PH/17
5015 were not taken care of correctly. The code is still untested by me (my
5016 Linux distribution still has 0.3.2 of radiusclient), but it was
5017 contributed by a Radius user.
5019 PH/24 When doing a callout, the value of $domain wasn't set correctly when
5020 expanding the "port" option of the smtp transport.
5022 TK/04 MIME ACL: Fix buffer underrun that occurs when EOF condition is met
5023 while reading a MIME header. Thanks to Tom Hughes for a patch.
5025 PH/24 Include config.h inside local_scan.h so that configuration settings are
5028 PH/25 Make $smtp_command_argument available after all SMTP commands. This means
5029 that in an ACL for RCPT (for example), you can examine exactly what was
5032 PH/26 Exim was recognizing IPv6 addresses of the form [IPv6:....] in EHLO
5033 commands, but it was not correctly comparing the address with the actual
5034 client host address. Thus, it would show the EHLO address in Received:
5035 header lines when this was not necessary.
5037 PH/27 Added the % operator to ${eval:}.
5039 PH/28 Exim tries to create and chdir to its spool directory when it starts;
5040 it should be ignoring failures (because with -C, for example, it has lost
5041 privilege). It wasn't ignoring creation failures other than "already
5044 PH/29 Added "crypteq" to the list of supported features that Exim outputs when
5047 PH/30 Fixed (presumably very longstanding) bug in exim_dbmbuild: if it failed
5048 because an input line was too long, either on its own, or by virtue of
5049 too many continuations, the temporary file was not being removed, and the
5050 return code was incorrect.
5052 PH/31 Missing "BOOL" in function definition in filtertest.c.
5054 PH/32 Applied Sieve patches from the maintainer.
5056 TK/05 Domainkeys: Accomodate for a minor API change in libdomainkeys 0.67.
5058 PH/33 Added "verify = not_blind".
5060 PH/34 There are settings for CHOWN_COMMAND and MV_COMMAND that can be used in
5061 Local/Makefile (with some defaults set). These are used in built scripts
5062 such as exicyclog, but they have never been used in the exim_install
5063 script (though there are many overriding facilities there). I have
5064 arranged that the exim_install script now takes note of these two
5067 PH/35 Installed configuration files for Dragonfly.
5069 PH/36 When a locally submitted message by a trusted user did not contain a
5070 From: header, and the sender address was obtained from -f or from an SMTP
5071 MAIL command, and the trusted user did not use -F to supply a sender
5072 name, $originator_name was incorrectly used when constructing a From:
5073 header. Furthermore, $originator_name was used for submission mode
5074 messages from external hosts without From: headers in a similar way,
5075 which is clearly wrong.
5077 PH/37 Added control=suppress_local_fixups.
5079 PH/38 When log_selector = +received_sender was set, and the addition of the
5080 sender made the log line's construction buffer exactly full, or one byte
5081 less than full, an overflow happened when the terminating "\n" was
5084 PH/39 Added a new log selector, "unknown_in_list", which provokes a log entry
5085 when the result of a list match is failure because a DNS lookup failed.
5087 PH/40 RM_COMMAND is now used in the building process.
5089 PH/41 Added a "distclean" target to the top-level Makefile; it deletes all
5090 the "build-* directories that it finds.
5092 PH/42 (But a TF fix): In a domain list, Exim incorrectly matched @[] if the IP
5093 address in a domain literal was a prefix of an interface address.
5095 PH/43 (Again a TF fix): In the dnslookup router, do not apply widen_domains
5096 when verifying a sender address, unless rewrite_headers is false.
5098 PH/44 Wrote a long comment about why errors_to addresses are verified as
5099 recipients, not senders.
5101 TF/01 Add missing LIBS=-lm to OS/Makefile-OpenBSD which was overlooked when
5102 the ratelimit ACL was added.
5104 PH/45 Added $smtp_command for the full command (cf $smtp_command_argument).
5106 PH/46 Added extra information about PostgreSQL errors to the error string.
5108 PH/47 Added an interface to a fake DNS resolver for use by the new test suite,
5109 avoiding the need to install special zones in a real server. This is
5110 backwards compatible; if it can't find the fake resolver, it drops back.
5111 Thus, both old and new test suites can be run.
5113 TF/02 Added util/ratelimit.pl
5115 TF/03 Minor fix to the ratelimit code to improve its behaviour in case the
5116 clock is set back in time.
5118 TF/04 Fix the ratelimit support in exim_fixdb. Patch provided by Brian
5119 Candler <B.Candler@pobox.com>.
5121 TF/05 The fix for PH/43 was not completely correct; widen_domains is always
5122 OK for addresses that are the result of redirections.
5124 PH/48 A number of further additions for the benefit of the new test suite,
5125 including a fake gethostbyname() that interfaces to the fake DNS resolver
5128 TF/06 The fix for widen_domains has also been applied to qualify_single and
5129 search_parents which are the other dnslookup options that can cause
5132 PH/49 Michael Haardt's randomized retrying, but as a separate retry parameter
5135 PH/50 Make never_users, trusted_users, admin_groups, trusted_groups expandable.
5137 TF/07 Exim produced the error message "an SRV record indicated no SMTP
5138 service" if it encountered an MX record with an empty target hostname.
5139 The message is now "an MX or SRV record indicated no SMTP service".
5141 TF/08 Change PH/13 introduced the possibility that verify=helo may defer,
5142 if the DNS of the sending site is misconfigured. This is quite a
5143 common situation. This change restores the behaviour of treating a
5144 helo verification defer as a failure.
5146 PH/51 If self=fail was set on a router, the bounce message did not include the
5147 actual error message.
5153 TF/01 Added support for Client SMTP Authorization. See NewStuff for details.
5155 PH/01 When a transport filter timed out in a pipe delivery, and the pipe
5156 command itself ended in error, the underlying message about the transport
5157 filter timeout was being overwritten with the pipe command error. Now the
5158 underlying error message should be appended to the second error message.
5160 TK/01 Fix poll() being unavailable on Mac OSX 10.2.
5162 PH/02 Reduce the amount of output that "make" produces by default. Full output
5163 can still be requested.
5165 PH/03 The warning log line about a condition test deferring for a "warn" verb
5166 was being output only once per connection, rather than after each
5167 occurrence (because it was using the same function as for successful
5168 "warn" verbs). This seems wrong, so I have changed it.
5170 TF/02 Two buglets in acl.c which caused Exim to read a few bytes of memory that
5171 it should not have, which might have caused a crash in the right
5172 circumstances, but probably never did.
5174 PH/04 Installed a modified version of Tony Finch's patch to make submission
5175 mode fix the return path as well as the Sender: header line, and to
5176 add a /name= option so that you can make the user's friendly name appear
5179 TF/03 Added the control = fakedefer ACL modifier.
5181 TF/04 Added the ratelimit ACL condition. See NewStuff for details. Thanks to
5182 Mark Lowes for thorough testing.
5184 TK/02 Rewrote SPF support to work with libspf2 versions >1.2.0.
5186 TK/03 Merged latest SRS patch from Miles Wilton.
5188 PH/05 There's a shambles in IRIX6 - it defines EX_OK in unistd.h which conflicts
5189 with the definition in sysexits.h (which is #included earlier).
5190 Fortunately, Exim does not actually use EX_OK. The code used to try to
5191 preserve the sysexits.h value, by assuming that macro definitions were
5192 scanned for macro replacements. I have been disabused of this notion,
5193 so now the code just undefines EX_OK before #including unistd.h.
5195 PH/06 There is a timeout for writing blocks of data, set by, e.g. data_timeout
5196 in the smtp transport. When a block could not be written in a single
5197 write() function, the timeout was being re-applied to each part-write.
5198 This seems wrong - if the receiver was accepting one byte at a time it
5199 would take for ever. The timeout is now adjusted when this happens. It
5200 doesn't have to be particularly precise.
5202 TK/04 Added simple SPF lookup method in EXPERIMENTAL_SPF. See NewStuff for
5203 details. Thanks to Chris Webb <chris@arachsys.com> for the patch!
5205 PH/07 Added "fullpostmaster" verify option, which does a check to <postmaster>
5206 without a domain if the check to <postmaster@domain> fails.
5208 SC/01 Eximstats: added -xls and the ability to specify output files
5209 (patch written by Frank Heydlauf).
5211 SC/02 Eximstats: use FileHandles for outputting results.
5213 SC/03 Eximstats: allow any combination of xls, txt, and html output.
5215 SC/04 Eximstats: fixed display of large numbers with -nvr option
5217 SC/05 Eximstats: fixed merging of reports with empty tables.
5219 SC/06 Eximstats: added the -include_original_destination flag
5221 SC/07 Eximstats: removed tabs and trailing whitespace.
5223 TK/05 Malware: Improve on aveserver error handling. Patch from Alex Miller.
5225 TK/06 MBOX spool code: Add real "From " MBOX separator line
5226 so the .eml file is really in mbox format (even though
5227 most programs do not really care). Patch from Alex Miller.
5229 TK/07 MBOX spool code: Add X-Envelope-From: and X-Envelope-To: headers.
5230 The latter is generated from $received_to and is only set if the
5231 message has one envelope recipient. SA can use these headers,
5232 obviously out-of-the-box. Patch from Alex Miller.
5234 PH/08 The ${def test on a variable was returning false if the variable's
5235 value was "0", contrary to what the specification has always said!
5236 The result should be true unless the variable is empty.
5238 PH/09 The syntax error of a character other than { following "${if
5239 def:variable_name" (after optional whitespace) was not being diagnosed.
5240 An expansion such as ${if def:sender_ident:{xxx}{yyy}} in which an
5241 accidental colon was present, for example, could give incorrect results.
5243 PH/10 Tidied the code in a number of places where the st_size field of a stat()
5244 result is used (not including appendfile, where other changes are about
5247 PH/11 Upgraded appendfile so that quotas larger than 2G are now supported.
5248 This involved changing a lot of size variables from int to off_t. It
5249 should work with maildirs and everything.
5251 TK/08 Apply fix provided by Michael Haardt to prevent deadlock in case of
5252 spamd dying while we are connected to it.
5254 TF/05 Fixed a ${extract error message typo reported by Jeremy Harris
5257 PH/12 Applied Alex Kiernan's patch for the API change for the error callback
5258 function for BDB 4.3.
5260 PH/13 Changed auto_thaw such that it does not apply to bounce messages.
5262 PH/14 Imported PCRE 6.0; this was more than just a trivial operation because
5263 the sources for PCRE have been re-arranged and more files are now
5266 PH/15 The code I had for printing potentially long long variables in PH/11
5267 above was not the best (it lost precision). The length of off_t variables
5268 is now inspected at build time, and an appropriate printing format (%ld
5269 or %lld) is chosen and #defined by OFF_T_FMT. We also define LONGLONG_T
5270 to be "long long int" or "long int". This is needed for the internal
5271 formatting function string_vformat().
5273 PH/16 Applied Matthew Newton's patch to exicyclog: "If log_file_path is set in
5274 the configuration file to be ":syslog", then the script "guesses" where
5275 the logs files are, rather than using the compiled in default. In our
5276 case the guess is not the same as the compiled default, so the script
5277 suddenly stopped working when I started to use syslog. The patch checks
5278 to see if log_file_path is "". If so, it attempts to read it from exim
5279 with no configuration file to get the compiled in version, before it
5280 falls back to the previous guessing code."
5282 TK/09 Added "prvs" and "prvscheck" expansion items. These help a lot with
5283 implementing BATV in an Exim configuration. See NewStuff for the gory
5286 PH/17 Applied Michael Haardt's patch for HP-UX, affecting only the os.h and
5287 Makefile that are specific to HP-UX.
5289 PH/18 If the "use_postmaster" option was set for a recipient callout together
5290 with the "random" option, the postmaster address was used as the MAIL
5291 FROM address for the random test, but not for the subsequent recipient
5292 test. It is now used for both.
5294 PH/19 Applied Michael Haardt's patch to update Sieve to RFC3028bis. "The
5295 patch removes a few documentation additions to RFC 3028, because the
5296 latest draft now contains them. It adds the new en;ascii-case comparator
5297 and a new error check for 8bit text in MIME parts. Comparator and
5298 require names are now matched exactly. I enabled the subaddress
5299 extension, but it is not well tested yet (read: it works for me)."
5301 PH/20 Added macros for time_t as for off_t (see PH/15 above) and used them to
5302 rework some of the code of TK/09 above to avoid the hardwired use of
5303 "%lld" and "long long". Replaced the call to snprintf() with a call to
5306 PH/21 Added some other messages to those in 4.51/PH/42, namely "All relevant MX
5307 records point to non-existent hosts", "retry timeout exceeded", and
5308 "retry time not reached for any host after a long failure period".
5310 PH/22 Fixed some oversights/typos causing bugs when Exim is compiled with
5311 experimental DomainKeys support:
5313 (1) The filter variables $n0-$n9 and $sn0-$sn9 were broken.
5314 (2) On an error such as an illegally used "control", the wrong name for
5315 the control was given.
5317 These problems did NOT occur unless DomainKeys support was compiled.
5319 PH/23 Added daemon_startup_retries and daemon_startup_sleep.
5321 PH/24 Added ${if match_ip condition.
5323 PH/25 Put debug statements on either side of calls to EXIM_DBOPEN() for hints
5324 databases so that it will be absolutely obvious if a crash occurs in the
5325 DB library. This is a regular occurrence (often caused by mis-matched
5328 PH/26 Insert a lot of missing (void) casts for functions such as chown(),
5329 chmod(), fcntl(), sscanf(), and other functions from stdio.h. These were
5330 picked up on a user's system that detects such things. There doesn't seem
5331 to be a gcc warning option for this - only an attribute that has to be
5332 put on the function's prototype. It seems that in Fedora Core 4 they have
5333 set this on a number of new functions. No doubt there will be more in due
5336 PH/27 If a dnslookup or manualroute router is set with verify=only, it need not
5337 specify a transport. However, if an address that was verified by such a
5338 router was the subject of a callout, Exim crashed because it tried to
5339 read the rcpt_include_affixes from the non-existent transport. Now it
5340 just assumes that the setting of that option is false. This bug was
5341 introduced by 4.51/PH/31.
5343 PH/28 Changed -d+all to exclude +memory, because that information is very
5344 rarely of interest, but it makes the output a lot bigger. People tend to
5345 do -d+all out of habit.
5347 PH/29 Removed support for the Linux-libc5 build, as it is obsolete and the
5348 code in os-type was giving problems when libc.so lives in lib64, like on
5351 PH/30 Exim's DNS code uses the original T_xxx names for DNS record times. These
5352 aren't the modern standard, and it seems that some systems' include files
5353 don't always have them. Exim was already checking for some of the newer
5354 ones like T_AAAA, and defining it itself. I've added checks for all the
5355 record types that Exim uses.
5357 PH/31 When using GnuTLS, if the parameters cache file did not exist, Exim was
5358 not automatically generating a new one, as it is supposed to. This
5359 prevented TLS from working. If the file did exist, but contained invalid
5360 data, a new version was generated, as expected. It was only the case of a
5361 non-existent file that was broken.
5363 TK/10 Domainkeys: Fix a bug in verification that caused a crash in conjunction
5364 with a change in libdomainkeys > 0.64.
5366 TK/11 Domainkeys: Change the logic how the "testing" policy flag is retrieved
5367 from DNS. If the selector record carries the flag, it now has
5368 precedence over the domain-wide flag.
5370 TK/12 Cleared some compiler warnings related to SPF, SRS and DK code.
5372 PH/32 In mua_wrapper mode, if an smtp transport configuration error (such as
5373 the use of a port name that isn't defined in /etc/services) occurred, the
5374 message was deferred as in a normal delivery, and thus remained on the
5375 spool, instead of being failed because of the mua_wrapper setting. This
5376 is now fixed, and I tidied up some of the mua_wrapper messages at the
5379 SC/08 Eximstats: whilst parsing the mainlog(s), store information about
5380 the messages in a hash of arrays rather than using individual hashes.
5381 This is a bit cleaner and results in dramatic memory savings, albeit
5382 at a slight CPU cost.
5384 SC/09 Eximstats: added the -show_rt<list> and the -show_dt<list> flags
5385 as requested by Marc Sherman.
5387 SC/10 Eximstats: added histograms for user specified patterns as requested
5390 SC/11 Eximstats: v1.43 - bugfix for pattern histograms with -h0 specified.
5392 PH/33 Patch from the Cygwin maintainer to add "b" to all occurences of
5393 fopen() in the content-scanning modules that did not already have it.
5399 TK/01 Added Yahoo DomainKeys support via libdomainkeys. See
5400 doc/experimental-spec.txt for details. (http://domainkeys.sf.net)
5402 TK/02 Fix ACL "control" statement not being available in MIME ACL.
5404 TK/03 Fix ACL "regex" condition not being available in MIME ACL.
5406 PH/01 Installed a patch from the Sieve maintainer that allows -bf to be used
5407 to test Sieve filters that use "vacation".
5409 PH/02 Installed a slightly modified version of Nikos Mavrogiannopoulos' patch
5410 that changes the way the GnuTLS parameters are stored in the cache file.
5411 The new format can be generated externally. For backward compatibility,
5412 if the data in the cache doesn't make sense, Exim assumes it has read an
5413 old-format file, and it generates new data and writes a new file. This
5414 means that you can't go back to an older release without removing the
5417 PH/03 A redirect router that has both "unseen" and "one_time" set does not
5418 work if there are any delivery delays because "one_time" forces the
5419 parent to be marked "delivered", so its unseen clone is never tried
5420 again. For this reason, Exim now forbids the simultaneous setting of
5423 PH/04 Change 4.11/85 fixed an obscure bug concerned with addresses that are
5424 redirected to themselves ("homonym" addresses). Read the long ChangeLog
5425 entry if you want to know the details. The fix, however, neglected to
5426 consider the case when local delivery batching is involved. The test for
5427 "previously delivered" was not happening when checking to see if an
5428 address could be batched with a previous (undelivered) one; under
5429 certain circumstances this could lead to multiple deliveries to the same
5432 PH/05 Renamed the macro SOCKLEN_T as EXIM_SOCKLEN_T because AIX uses SOCKLEN_T
5433 in its include files, and this causes problems building Exim.
5435 PH/06 A number of "verify =" ACL conditions have no options (e.g. verify =
5436 header_syntax) but Exim was just ignoring anything given after a slash.
5437 In particular, this caused confusion with an attempt to use "verify =
5438 reverse_host_lookup/defer_ok". An error is now given when options are
5439 supplied for verify items that do not have them. (Maybe reverse_host_
5440 lookup should have a defer_ok option, but that's a different point.)
5442 PH/07 Increase the size of the buffer for incoming SMTP commands from 512 (as
5443 defined by RFC 821) to 2048, because there were problems with some AUTH
5444 commands, and RFC 1869 says the size should be increased for extended
5445 SMTP commands that take arguments.
5447 PH/08 Added ${dlfunc dynamically loaded function for expansion (code from Tony
5450 PH/09 Previously, an attempt to use ${perl when it wasn't compiled gave an
5451 "unknown" error; now it says that the functionality isn't in the binary.
5453 PH/10 Added a nasty fudge to try to recognize and flatten LDAP passwords in
5454 an address' error message when a string expansion fails (syntax or
5455 whatever). Otherwise the password may appear in the log. Following change
5456 PH/42 below, there is no longer a chance of it appearing in a bounce
5459 PH/11 Installed exipick version 20050225.0 from John Jetmore.
5461 PH/12 If the last host in a fallback_hosts list was multihomed, only the first
5462 of its addresses was ever tried. (Bugzilla bug #2.)
5464 PH/13 If "headers_add" in a transport didn't end in a newline, Exim printed
5465 the result incorrectly in the debug output. (It correctly added a newline
5466 to what was transported.)
5468 TF/01 Added $received_time.
5470 PH/14 Modified the default configuration to add an acl_smtp_data ACL, with
5471 commented out examples of how to interface to a virus scanner and to
5472 SpamAssassin. Also added commented examples of av_scanner and
5473 spamd_address settings.
5475 PH/15 Further to TK/02 and TK/03 above, tidied up the tables of what conditions
5476 and controls are allowed in which ACLs. There were a couple of minor
5477 errors. Some of the entries in the conditions table (which is a table of
5478 where they are NOT allowed) were getting very unwieldy; rewrote them as a
5479 negation of where the condition IS allowed.
5481 PH/16 Installed updated OS/os.c-cygwin from the Cygwin maintainer.
5483 PH/17 The API for radiusclient changed at release 0.4.0. Unfortunately, the
5484 header file does not have a version number, so I've had to invent a new
5485 value for RADIUS_LIB_TYPE, namely "RADIUSCLIENTNEW" to request the new
5486 API. The code is untested by me (my Linux distribution still has 0.3.2 of
5487 radiusclient), but it was contributed by a Radius user.
5489 PH/18 Installed Lars Mainka's patch for the support of CRL collections in
5490 files or directories, for OpenSSL.
5492 PH/19 When an Exim process that is running as root has to create an Exim log
5493 file, it does so in a subprocess that runs as exim:exim so as to get the
5494 ownership right at creation (otherwise, other Exim processes might see
5495 the file with the wrong ownership). There was no test for failure of this
5496 fork() call, which would lead to the process getting stuck as it waited
5497 for a non-existent subprocess. Forks do occasionally fail when resources
5498 run out. I reviewed all the other calls to fork(); they all seem to check
5501 PH/20 When checking for unexpected SMTP input at connect time (before writing
5502 the banner), Exim was not dealing correctly with a non-positive return
5503 from the read() function. If the client had disconnected by this time,
5504 the result was a log entry for a synchronization error with an empty
5505 string after "input=" when read() returned zero. If read() returned -1
5506 (an event I could not check), uninitialized data bytes were printed.
5507 There were reports of junk text (parts of files, etc) appearing after
5510 PH/21 Added acl_not_smtp_mime to allow for MIME scanning for non-SMTP messages.
5512 PH/22 Added support for macro redefinition, and (re)definition in between
5513 driver and ACL definitions.
5515 PH/23 The cyrus_sasl authenticator was expanding server_hostname, but then
5516 forgetting to use the resulting value; it was using the unexpanded value.
5518 PH/24 The cyrus_sasl authenticator was advertising mechanisms for which it
5519 hadn't been configured. The fix is from Juergen Kreileder, who
5520 understands it better than I do:
5522 "Here's what I see happening with three configured cyrus_sasl
5523 authenticators configured (plain, login, cram-md5):
5525 On startup auth_cyrus_sasl_init() gets called for each of these.
5526 This means three calls to sasl_listmech() without a specified mech_list.
5527 => SASL tests which mechs of all available mechs actually work
5528 => three warnings about OTP not working
5529 => the returned list contains: plain, login, cram-md5, digest-md5, ...
5531 With the patch, sasl_listmech() also gets called three times. But now
5532 SASL's mech_list option is set to the server_mech specified in the the
5533 authenticator. Or in other words, the answer from sasl_listmech()
5534 gets limited to just the mech you're testing for (which is different
5536 => the return list contains just 'plain' or 'login', 'cram-md5' or
5537 nothing depending on the value of ob->server_mech.
5539 I've just tested the patch: Authentication still works fine,
5540 unavailable mechs specified in the exim configuration are still
5541 caught, and the auth.log warnings about OTP are gone."
5543 PH/25 When debugging is enabled, the contents of the command line are added
5544 to the debugging output, even when log_selector=+arguments is not
5547 PH/26 Change scripts/os-type so that when "uname -s" returns just "GNU", the
5548 answer is "GNU", and only if the return is "GNU/something" is the answer
5551 PH/27 $acl_verify_message is now set immediately after the failure of a
5552 verification in an ACL, and so is available in subsequent modifiers. In
5553 particular, the message can be preserved by coding like this:
5555 warn !verify = sender
5556 set acl_m0 = $acl_verify_message
5558 Previously, $acl_verify_message was set only while expanding "message"
5559 and "log_message" when a very denied access.
5561 PH/28 Modified OS/os.c-Linux with
5563 -#ifndef OS_LOAD_AVERAGE
5564 +#if !defined(OS_LOAD_AVERAGE) && defined(__linux__)
5566 to make Exim compile on kfreebsd-gnu. (I'm totally confused about the
5567 nomenclature these days.)
5569 PH/29 Installed patch from the Sieve maintainer that adds the options
5570 sieve_useraddress and sieve_subaddress to the redirect router.
5572 PH/30 In these circumstances:
5573 . Two addresses routed to the same list of hosts;
5574 . First host does not offer TLS;
5575 . First host accepts first address;
5576 . First host gives temporary error to second address;
5577 . Second host offers TLS and a TLS session is established;
5578 . Second host accepts second address.
5579 Exim incorrectly logged both deliveries with the TLS parameters (cipher
5580 and peerdn, if requested) that were in fact used only for the second
5583 PH/31 When doing a callout as part of verifying an address, Exim was not paying
5584 attention to any local part prefix or suffix that was matched by the
5585 router that accepted the address. It now behaves in the same way as it
5586 does for delivery: the affixes are removed from the local part unless
5587 rcpt_include_affixes is set on the transport.
5589 PH/32 Add the sender address, as F=<...>, to the log line when logging a
5590 timeout during the DATA phase of an incoming message.
5592 PH/33 Sieve envelope tests were broken for match types other than :is. I have
5593 applied a patch sanctioned by the Sieve maintainer.
5595 PH/34 Change 4.50/80 broke Exim in that it could no longer handle cases where
5596 the uid or gid is negative. A case of a negative gid caused this to be
5597 noticed. The fix allows for either to be negative.
5599 PH/35 ACL_WHERE_MIME is now declared unconditionally, to avoid too much code
5600 clutter, but the tables that are indexed by ACL_WHERE_xxx values had been
5603 PH/36 The change PH/12 above was broken. Fixed it.
5605 PH/37 Exim used to check for duplicate addresses in the middle of routing, on
5606 the grounds that routing the same address twice would always produce the
5607 same answer. This might have been true once, but it is certainly no
5608 longer true now. Routing a child address may depend on the previous
5609 routing that produced that child. Some complicated redirection strategies
5610 went wrong when messages had multiple recipients, and made Exim's
5611 behaviour dependent on the order in which the addresses were given.
5613 I have moved the duplicate checking until after the routing is complete.
5614 Exim scans the addresses that are assigned to local and remote
5615 transports, and removes any duplicates. This means that more work will be
5616 done, as duplicates will always all be routed, but duplicates are
5617 presumably rare, so I don't expect this is of any significance.
5619 For deliveries to pipes, files, and autoreplies, the duplicate checking
5620 still happens during the routing process, since they are not going to be
5623 PH/38 Installed a patch from Ian Freislich, with the agreement of Tom Kistner.
5624 It corrects a timeout issue with spamd. This is Ian's comment: "The
5625 background is that sometimes spamd either never reads data from a
5626 connection it has accepted, or it never writes response data. The exiscan
5627 spam.[ch] uses a 3600 second timeout on spamd socket reads, further, it
5628 blindly assumes that writes won't block so it may never time out."
5630 PH/39 Allow G after quota size as well as K and M.
5632 PH/40 The value set for $authenticated_id in an authenticator may not contain
5633 binary zeroes or newlines because the value is written to log lines and
5634 to spool files. There was no check on this. Now the value is run through
5635 the string_printing() function so that such characters are converted to
5636 printable escape sequences.
5638 PH/41 $message_linecount is a new variable that contains the total number of
5639 lines in the message. Compare $body_linecount, which is the count for the
5642 PH/42 Exim no longer gives details of delivery errors for specific addresses in
5643 bounce and delay warning messages, except in certain special cases, which
5646 (a) An SMTP error message from a remote host;
5647 (b) A message specified in a :fail: redirection;
5648 (c) A message specified in a "fail" command in a system filter;
5649 (d) A message specified in a FAIL return from the queryprogram router;
5650 (e) A message specified by the cannot_route_message router option.
5652 In these cases only, Exim does include the error details in bounce and
5653 warning messages. There are also a few cases where bland messages such
5654 as "unrouteable address" or "local delivery error" are given.
5656 PH/43 $value is now also set for the "else" part of a ${run expansion.
5658 PH/44 Applied patch from the Sieve maintainer: "The vacation draft is still
5659 being worked on, but at least Exim now implements the latest version to
5662 PH/45 In a pipe transport, although a timeout while waiting for the pipe
5663 process to complete was treated as a delivery failure, a timeout while
5664 writing the message to the pipe was logged, but erroneously treated as a
5665 successful delivery. Such timeouts include transport filter timeouts. For
5666 consistency with the overall process timeout, these timeouts are now
5667 treated as errors, giving rise to delivery failures by default. However,
5668 there is now a new Boolean option for the pipe transport called
5669 timeout_defer, which, if set TRUE, converts the failures into defers for
5670 both kinds of timeout. A transport filter timeout is now identified in
5673 PH/46 The "scripts/Configure-config.h" script calls "make" at one point. On
5674 systems where "make" and "gmake" are different, calling "gmake" at top
5675 level broke things. I've arranged for the value of $(MAKE) to be passed
5676 from the Makefile to this script so that it can call the same version of
5680 A note about Exim versions 4.44 and 4.50
5681 ----------------------------------------
5683 Exim 4.50 was meant to be the next release after 4.43. It contains a lot of
5684 changes of various kinds. As a consequence, a big documentation update was
5685 needed. This delayed the release for rather longer than seemed good, especially
5686 in the light of a couple of (minor) security issues. Therefore, the changes
5687 that fixed bugs were backported into 4.43, to create a 4.44 maintenance
5688 release. So 4.44 and 4.50 are in effect two different branches that both start
5691 I have left the 4.50 change log unchanged; it contains all the changes since
5692 4.43. The change log for 4.44 is below; many of its items are identical to
5693 those for 4.50. This seems to be the most sensible way to preserve the
5694 historical information.
5700 1. Minor wording change to the doc/README.SIEVE file.
5702 2. Change 4.43/35 introduced a bug: if quota_filecount was set, the
5703 computation of the current number of files was incorrect.
5705 3. Closing a stable door: arrange to panic-die if setitimer() ever fails. The
5706 bug fixed in 4.43/37 would have been diagnosed quickly if this had been in
5709 4. Give more explanation in the error message when the command for a transport
5710 filter fails to execute.
5712 5. There are several places where Exim runs a non-Exim command in a
5713 subprocess. The SIGUSR1 signal should be disabled for these processes. This
5714 was being done only for the command run by the queryprogram router. It is
5715 now done for all such subprocesses. The other cases are: ${run, transport
5716 filters, and the commands run by the lmtp and pipe transports.
5718 6. Added CONFIGURE_GROUP build-time option.
5720 7. Some older OS have a limit of 256 on the maximum number of file
5721 descriptors. Exim was using setrlimit() to set 1000 as a large value
5722 unlikely to be exceeded. Change 4.43/17 caused a lot of logging on these
5723 systems. I've change it so that if it can't get 1000, it tries for 256.
5725 8. "control=submission" was allowed, but had no effect, in a DATA ACL. This
5726 was an oversight, and furthermore, ever since the addition of extra
5727 controls (e.g. 4.43/32), the checks on when to allow different forms of
5728 "control" were broken. There should now be diagnostics for all cases when a
5729 control that does not make sense is encountered.
5731 9. Added the /retain_sender option to "control=submission".
5733 10. $recipients is now available in the predata ACL (oversight).
5735 11. Tidy the search cache before the fork to do a delivery from a message
5736 received from the command line. Otherwise the child will trigger a lookup
5737 failure and thereby defer the delivery if it tries to use (for example) a
5738 cached ldap connection that the parent has called unbind on.
5740 12. If verify=recipient was followed by verify=sender in a RCPT ACL, the value
5741 of $address_data from the recipient verification was clobbered by the
5742 sender verification.
5744 13. The value of address_data from a sender verification is now available in
5745 $sender_address_data in subsequent conditions in the ACL statement.
5747 14. Added forbid_sieve_filter and forbid_exim_filter to the redirect router.
5749 15. Added a new option "connect=<time>" to callout options, to set a different
5752 16. If FIXED_NEVER_USERS was defined, but empty, Exim was assuming the uid 0
5753 was its contents. (It was OK if the option was not defined at all.)
5755 17. A "Completed" log line is now written for messages that are removed from
5756 the spool by the -Mrm option.
5758 18. New variables $sender_verify_failure and $recipient_verify_failure contain
5759 information about exactly what failed.
5761 19. Added -dd to debug only the daemon process.
5763 20. Incorporated Michael Haardt's patch to ldap.c for improving the way it
5764 handles timeouts, both on the server side and network timeouts. Renamed the
5765 CONNECT parameter as NETTIMEOUT (but kept the old name for compatibility).
5767 21. The rare case of EHLO->STARTTLS->HELO was setting the protocol to "smtp".
5768 It is now set to "smtps".
5770 22. $host_address is now set to the target address during the checking of
5771 ignore_target_hosts.
5773 23. When checking ignore_target_hosts for an ipliteral router, no host name was
5774 being passed; this would have caused $sender_host_name to have been used if
5775 matching the list had actually called for a host name (not very likely,
5776 since this list is usually IP addresses). A host name is now passed as
5779 24. Changed the calls that set up the SIGCHLD handler in the daemon to use the
5780 code that specifies a non-restarting handler (typically sigaction() in
5781 modern systems) in an attempt to fix a rare and obscure crash bug.
5783 25. Narrowed the window for a race in the daemon that could cause it to ignore
5784 SIGCHLD signals. This is not a major problem, because they are used only to
5785 wake it up if nothing else does.
5787 26. A malformed maildirsize file could cause Exim to calculate negative values
5788 for the mailbox size or file count. Odd effects could occur as a result.
5789 The maildirsize information is now recalculated if the size or filecount
5792 27. Added HAVE_SYS_STATVFS_H to the os.h file for Linux, as it has had this
5793 support for a long time. Removed HAVE_SYS_VFS_H.
5795 28. Installed the latest version of exipick from John Jetmore.
5797 29. In an address list, if the pattern was not a regular expression, an empty
5798 subject address (from a bounce message) matched only if the pattern was an
5799 empty string. Non-empty patterns were not even tested. This was the wrong
5800 because it is perfectly reasonable to use an empty address as part of a
5801 database query. An empty address is now tested by patterns that are
5802 lookups. However, all the other forms of pattern expect the subject to
5803 contain a local part and a domain, and therefore, for them, an empty
5804 address still always fails if the pattern is not itself empty.
5806 30. Exim went into a mad DNS loop when attempting to do a callout where the
5807 host was specified on an smtp transport, and looking it up yielded more
5808 than one IP address.
5810 31. Re-factored the code for checking spool and log partition space into a
5811 function that finds that data and another that does the check. The former
5812 is then used to implement four new variables: $spool_space, $log_space,
5813 $spool_inodes, and $log_inodes.
5815 32. The RFC2047 encoding function was originally intended for short strings
5816 such as real names; it was not keeping to the 75-character limit for
5817 encoded words that the RFC imposes. It now respects the limit, and
5818 generates multiple encoded words if necessary. To be on the safe side, I
5819 have increased the buffer size for the ${rfc2047: expansion operator from
5822 33. It is now permitted to omit both strings after an "if" condition; if the
5823 condition is true, the result is "true". As before, when the second string
5824 is omitted, a false condition yields an empty string. This makes it less
5825 cumbersome to write custom ACL and router conditions.
5827 34. Failure to deliver a bounce message always caused it to be frozen, even if
5828 there was an errors_to setting on the router. The errors_to setting is now
5831 35. If an IPv6 address is given for -bh or -bhc, it is now converted to the
5832 canonical form (fully expanded) before being placed in
5833 $sender_host_address.
5835 36. The table in the code that translates DNS record types into text (T_A to
5836 "A" for instance) was missing entries for NS and CNAME. It is just possible
5837 that this could have caused confusion if both these types were looked up
5838 for the same domain, because the text type is used as part of Exim's
5839 per-process caching. But the chance of anyone hitting this buglet seems
5842 37. The dnsdb lookup has been extended in a number of ways.
5844 (1) There is a new type, "zns", which walks up the domain tree until it
5845 finds some nameserver records. It should be used with care.
5847 (2) There is a new type, "mxh", which is like "mx" except that it returns
5848 just the host names, not the priorities.
5850 (3) It is now possible to give a list of domains (or IP addresses) to be
5851 looked up. The behaviour when one of the lookups defers can be
5852 controlled by a keyword.
5854 (4) It is now possible to specify the separator character for use when
5855 multiple records are returned.
5857 38. The dnslists ACL condition has been extended: it is now possible to supply
5858 a list of IP addresses and/or domains to be looked up in a particular DNS
5861 39. Added log_selector=+queue_time_overall.
5863 40. When running the queue in the test harness, wait just a tad after forking a
5864 delivery process, to get repeatability of debugging output.
5866 41. Include certificate and key file names in error message when GnuTLS fails
5867 to set them up, because the GnuTLS error message doesn't include the name
5868 of the failing file when there is a problem reading it.
5870 42. Allow both -bf and -bF in the same test run.
5872 43. Did the same fix as 41 above for OpenSSL, which had the same infelicity.
5874 44. The "Exiscan patch" is now merged into the mainline Exim source.
5876 45. Sometimes the final signoff response after QUIT could fail to get
5877 transmitted in the non-TLS case. Testing !tls_active instead of tls_active
5878 < 0 before doing a fflush(). This bug looks as though it goes back to the
5879 introduction of TLS in release 3.20, but "sometimes" must have been rare
5880 because the tests only now provoked it.
5882 46. Reset the locale to "C" after calling embedded Perl, in case it was changed
5883 (this can affect the format of dates).
5885 47. exim_tidydb, when checking for the continued existence of a message for
5886 which it has found a message-specific retry record, was not finding
5887 messages that were in split spool directories. Consequently, it was
5888 deleting retry records that should have stayed in existence.
5890 48. Steve fixed some bugs in eximstats.
5892 49. The SPA authentication driver was not abandoning authentication and moving
5893 on to the next authenticator when an expansion was forced to fail,
5894 contradicting the general specification for all authenticators. Instead it
5895 was generating a temporary error. It now behaves as specified.
5897 50. The default ordering of permitted cipher suites for GnuTLS was pessimal
5898 (the order specifies the preference for clients). The order is now AES256,
5899 AES128, 3DES, ARCFOUR128.
5901 51. Small patch to Sieve code - explicitly set From: when generating an
5904 52. Exim crashed if a remote delivery caused a very long error message to be
5905 recorded - for instance if somebody sent an entire SpamAssassin report back
5906 as a large number of 550 error lines. This bug was coincidentally fixed by
5907 increasing the size of one of Exim's internal buffers (big_buffer) that
5908 happened as part of the Exiscan merge. However, to be on the safe side, I
5909 have made the code more robust (and fixed the comments that describe what
5912 53. Now that there can be additional text after "Completed" in log lines (if
5913 the queue_time_overall log selector is set), a one-byte patch to exigrep
5914 was needed to allow it to recognize "Completed" as not the last thing in
5917 54. The LDAP lookup was not handling a return of LDAP_RES_SEARCH_REFERENCE. A
5918 patch that reportedly fixes this has been added. I am not expert enough to
5919 create a test for it. This is what the patch creator wrote:
5921 "I found a little strange behaviour of ldap code when working with
5922 Windows 2003 AD Domain, where users was placed in more than one
5923 Organization Units. When I tried to give exim partial DN, the exit code
5924 of ldap_search was unknown to exim because of LDAP_RES_SEARCH_REFERENCE.
5925 But simultaneously result of request was absolutely normal ldap result,
5926 so I produce this patch..."
5928 Later: it seems that not all versions of LDAP support LDAP_RES_SEARCH_
5929 REFERENCE, so I have modified the code to exclude the patch when that macro
5932 55. Some experimental protocols are using DNS PTR records for new purposes. The
5933 keys for these records are domain names, not reversed IP addresses. The
5934 dnsdb PTR lookup now tests whether its key is an IP address. If not, it
5935 leaves it alone. Component reversal etc. now happens only for IP addresses.
5938 56. Improve error message when ldap_search() fails in OpenLDAP or Solaris LDAP.
5940 57. Double the size of the debug message buffer (to 2048) so that more of very
5941 long debug lines gets shown.
5943 58. The exicyclog utility now does better if the number of log files to keep
5944 exceeds 99. In this case, it numbers them 001, 002 ... instead of 01, 02...
5946 59. Two changes related to the smtp_active_hostname option:
5948 (1) $smtp_active_hostname is now available as a variable.
5949 (2) The default for smtp_banner uses $smtp_active_hostname instead
5950 of $primary_hostname.
5952 60. The host_aton() function is supposed to be passed a string that is known
5953 to be a valid IP address. However, in the case of IPv6 addresses, it was
5954 not checking this. This is a hostage to fortune. Exim now panics and dies
5955 if the condition is not met. A case was found where this could be provoked
5956 from a dnsdb PTR lookup with an IPv6 address that had more than 8
5957 components; fortuitously, this particular loophole had already been fixed
5958 by change 4.50/55 above.
5960 If there are any other similar loopholes, the new check in host_aton()
5961 itself should stop them being exploited. The report I received stated that
5962 data on the command line could provoke the exploit when Exim was running as
5963 exim, but did not say which command line option was involved. All I could
5964 find was the use of -be with a bad dnsdb PTR lookup, and in that case it is
5965 running as the user.
5968 61. There was a buffer overflow vulnerability in the SPA authentication code
5969 (which came originally from the Samba project). I have added a test to the
5970 spa_base64_to_bits() function which I hope fixes it.
5973 62. Configuration update for GNU/Hurd and variations. Updated Makefile-GNU and
5974 os.h-GNU, and added configuration files for GNUkFreeBSD and GNUkNetBSD.
5976 63. The daemon start-up calls getloadavg() while still root for those OS that
5977 need the first call to be done as root, but it missed one case: when
5978 deliver_queue_load_max is set with deliver_drop_privilege. This is
5979 necessary for the benefit of the queue runner, because there is no re-exec
5980 when deliver_drop_privilege is set.
5982 64. A call to exiwhat cut short delays set up by "delay" modifiers in ACLs.
5983 This has been fixed.
5985 65. Caching of lookup data for "hosts =" ACL conditions, when a named host list
5986 was in use, was not putting the data itself into the right store pool;
5987 consequently, it could be overwritten for a subsequent message in the same
5988 SMTP connection. (Fix 4.40/11 dealt with the non-cache case, but overlooked
5991 66. Added hosts_max_try_hardlimit to the smtp transport, default 50.
5993 67. The string_is_ip_address() function returns 0, 4, or 6, for "no an IP
5994 address", "IPv4 address", and "IPv6 address", respectively. Some calls of
5995 the function were treating the return as a boolean value, which happened to
5996 work because 0=false and not-0=true, but is not correct code.
5998 68. The host_aton() function was not handling scoped IPv6 addresses (those
5999 with, for example, "%eth0" on the end) correctly.
6001 69. Fixed some compiler warnings in acl.c for the bitmaps specified with
6002 negated items (that is, ~something) in unsigned ints. Some compilers
6003 apparently mutter when there is no cast.
6005 70. If an address verification called from an ACL failed, and did not produce a
6006 user-specific message (i.e. there was only a "system" message), nothing was
6007 put in $acl_verify_message. In this situation, it now puts the system
6010 71. Change 4.23/11 added synchronization checking at the start of an SMTP
6011 session; change 4.31/43 added the unwanted input to the log line - except
6012 that it did not do this in the start of session case. It now does.
6014 72. After a timeout in a callout SMTP session, Exim still sent a QUIT command.
6015 This is wrong and can cause the other end to generate a synchronization
6016 error if it is another Exim or anything else that does the synchronization
6017 check. A QUIT command is no longer sent after a timeout.
6019 73. $host_lookup_deferred has been added, to make it easier to detect DEFERs
6020 during host lookups.
6022 74. The defer_ok option of callout verification was not working if it was used
6023 when verifying addresses in header lines, that is, for this case:
6025 verify = header_sender/callout=defer_ok
6027 75. A backgrounded daemon closed stdin/stdout/stderr on entry; this meant that
6028 those file descriptors could be used for SMTP connections. If anything
6029 wrote to stderr (the example that came up was "warn" in embedded Perl), it
6030 could be sent to the SMTP client, causing chaos. The daemon now opens
6031 stdin, stdout, and stderr to /dev/null when it puts itself into the
6034 76. Arrange for output from Perl's "warn" command to be written to Exim's main
6035 log by default. The user can override this with suitable Perl magic.
6037 77. The use of log_message on a "discard" ACL verb, which is supposed to add to
6038 the log message when discard triggers, was not working for the DATA ACL or
6039 for the non-SMTP ACL.
6041 78. Error message wording change in sieve.c.
6043 79. If smtp_accept_max_per_host was set, the number of connections could be
6044 restricted to fewer than expected, because the daemon was trying to set up
6045 a new connection before checking whether the processes handling previous
6046 connections had finished. The check for completed processes is now done
6047 earlier. On busy systems, this bug wouldn't be noticed because something
6048 else would have woken the daemon, and it would have reaped the completed
6051 80. If a message was submitted locally by a user whose login name contained one
6052 or more spaces (ugh!), the spool file that Exim wrote was not re-readable.
6053 It caused a spool format error. I have fixed the spool reading code. A
6054 related problem was that the "from" clause in the Received: line became
6055 illegal because of the space(s). It is now covered by ${quote_local_part.
6057 81. Included the latest eximstats from Steve (adds average sizes to HTML Top
6060 82. Updated OS/Makefile-AIX as per message from Mike Meredith.
6062 83. Patch from Sieve maintainer to fix unterminated string problem in
6063 "vacation" handling.
6065 84. Some minor changes to the Linux configuration files to help with other
6066 OS variants using glibc.
6068 85. One more patch for Sieve to update vacation handling to latest spec.
6071 ----------------------------------------------------
6072 See the note above about the 4.44 and 4.50 releases.
6073 ----------------------------------------------------
6079 1. Change 4.43/35 introduced a bug that caused file counts to be
6080 incorrectly computed when quota_filecount was set in an appendfile
6083 2. Closing a stable door: arrange to panic-die if setitimer() ever fails. The
6084 bug fixed in 4.43/37 would have been diagnosed quickly if this had been in
6087 3. Give more explanation in the error message when the command for a transport
6088 filter fails to execute.
6090 4. There are several places where Exim runs a non-Exim command in a
6091 subprocess. The SIGUSR1 signal should be disabled for these processes. This
6092 was being done only for the command run by the queryprogram router. It is
6093 now done for all such subprocesses. The other cases are: ${run, transport
6094 filters, and the commands run by the lmtp and pipe transports.
6096 5. Some older OS have a limit of 256 on the maximum number of file
6097 descriptors. Exim was using setrlimit() to set 1000 as a large value
6098 unlikely to be exceeded. Change 4.43/17 caused a lot of logging on these
6099 systems. I've change it so that if it can't get 1000, it tries for 256.
6101 6. "control=submission" was allowed, but had no effect, in a DATA ACL. This
6102 was an oversight, and furthermore, ever since the addition of extra
6103 controls (e.g. 4.43/32), the checks on when to allow different forms of
6104 "control" were broken. There should now be diagnostics for all cases when a
6105 control that does not make sense is encountered.
6107 7. $recipients is now available in the predata ACL (oversight).
6109 8. Tidy the search cache before the fork to do a delivery from a message
6110 received from the command line. Otherwise the child will trigger a lookup
6111 failure and thereby defer the delivery if it tries to use (for example) a
6112 cached ldap connection that the parent has called unbind on.
6114 9. If verify=recipient was followed by verify=sender in a RCPT ACL, the value
6115 of $address_data from the recipient verification was clobbered by the
6116 sender verification.
6118 10. If FIXED_NEVER_USERS was defined, but empty, Exim was assuming the uid 0
6119 was its contents. (It was OK if the option was not defined at all.)
6121 11. A "Completed" log line is now written for messages that are removed from
6122 the spool by the -Mrm option.
6124 12. $host_address is now set to the target address during the checking of
6125 ignore_target_hosts.
6127 13. When checking ignore_target_hosts for an ipliteral router, no host name was
6128 being passed; this would have caused $sender_host_name to have been used if
6129 matching the list had actually called for a host name (not very likely,
6130 since this list is usually IP addresses). A host name is now passed as
6133 14. Changed the calls that set up the SIGCHLD handler in the daemon to use the
6134 code that specifies a non-restarting handler (typically sigaction() in
6135 modern systems) in an attempt to fix a rare and obscure crash bug.
6137 15. Narrowed the window for a race in the daemon that could cause it to ignore
6138 SIGCHLD signals. This is not a major problem, because they are used only to
6139 wake it up if nothing else does.
6141 16. A malformed maildirsize file could cause Exim to calculate negative values
6142 for the mailbox size or file count. Odd effects could occur as a result.
6143 The maildirsize information is now recalculated if the size or filecount
6146 17. Added HAVE_SYS_STATVFS_H to the os.h file for Linux, as it has had this
6147 support for a long time. Removed HAVE_SYS_VFS_H.
6149 18. Updated exipick to current release from John Jetmore.
6151 19. Allow an empty sender to be matched against a lookup in an address list.
6152 Previously the only cases considered were a regular expression, or an
6155 20. Exim went into a mad DNS lookup loop when doing a callout where the
6156 host was specified on the transport, if the DNS lookup yielded more than
6159 21. The RFC2047 encoding function was originally intended for short strings
6160 such as real names; it was not keeping to the 75-character limit for
6161 encoded words that the RFC imposes. It now respects the limit, and
6162 generates multiple encoded words if necessary. To be on the safe side, I
6163 have increased the buffer size for the ${rfc2047: expansion operator from
6166 22. Failure to deliver a bounce message always caused it to be frozen, even if
6167 there was an errors_to setting on the router. The errors_to setting is now
6170 23. If an IPv6 address is given for -bh or -bhc, it is now converted to the
6171 canonical form (fully expanded) before being placed in
6172 $sender_host_address.
6174 24. Updated eximstats to version 1.33
6176 25. Include certificate and key file names in error message when GnuTLS fails
6177 to set them up, because the GnuTLS error message doesn't include the name
6178 of the failing file when there is a problem reading it.
6180 26. Expand error message when OpenSSL has problems setting up cert/key files.
6183 27. Reset the locale to "C" after calling embedded Perl, in case it was changed
6184 (this can affect the format of dates).
6186 28. exim_tidydb, when checking for the continued existence of a message for
6187 which it has found a message-specific retry record, was not finding
6188 messages that were in split spool directories. Consequently, it was
6189 deleting retry records that should have stayed in existence.
6191 29. eximstats updated to version 1.35
6192 1.34 - allow eximstats to parse syslog lines as well as mainlog lines
6193 1.35 - bugfix such that pie charts by volume are generated correctly
6195 30. The SPA authentication driver was not abandoning authentication and moving
6196 on to the next authenticator when an expansion was forced to fail,
6197 contradicting the general specification for all authenticators. Instead it
6198 was generating a temporary error. It now behaves as specified.
6200 31. The default ordering of permitted cipher suites for GnuTLS was pessimal
6201 (the order specifies the preference for clients). The order is now AES256,
6202 AES128, 3DES, ARCFOUR128.
6204 31. Small patch to Sieve code - explicitly set From: when generating an
6207 32. Exim crashed if a remote delivery caused a very long error message to be
6208 recorded - for instance if somebody sent an entire SpamAssassin report back
6209 as a large number of 550 error lines. This bug was coincidentally fixed by
6210 increasing the size of one of Exim's internal buffers (big_buffer) that
6211 happened as part of the Exiscan merge. However, to be on the safe side, I
6212 have made the code more robust (and fixed the comments that describe what
6215 33. Some experimental protocols are using DNS PTR records for new purposes. The
6216 keys for these records are domain names, not reversed IP addresses. The
6217 dnsdb PTR lookup now tests whether its key is an IP address. If not, it
6218 leaves it alone. Component reversal etc. now happens only for IP addresses.
6221 34. The host_aton() function is supposed to be passed a string that is known
6222 to be a valid IP address. However, in the case of IPv6 addresses, it was
6223 not checking this. This is a hostage to fortune. Exim now panics and dies
6224 if the condition is not met. A case was found where this could be provoked
6225 from a dnsdb PTR lookup with an IPv6 address that had more than 8
6226 components; fortuitously, this particular loophole had already been fixed
6227 by change 4.50/55 or 4.44/33 above.
6229 If there are any other similar loopholes, the new check in host_aton()
6230 itself should stop them being exploited. The report I received stated that
6231 data on the command line could provoke the exploit when Exim was running as
6232 exim, but did not say which command line option was involved. All I could
6233 find was the use of -be with a bad dnsdb PTR lookup, and in that case it is
6234 running as the user.
6237 35. There was a buffer overflow vulnerability in the SPA authentication code
6238 (which came originally from the Samba project). I have added a test to the
6239 spa_base64_to_bits() function which I hope fixes it.
6242 36. The daemon start-up calls getloadavg() while still root for those OS that
6243 need the first call to be done as root, but it missed one case: when
6244 deliver_queue_load_max is set with deliver_drop_privilege. This is
6245 necessary for the benefit of the queue runner, because there is no re-exec
6246 when deliver_drop_privilege is set.
6248 37. Caching of lookup data for "hosts =" ACL conditions, when a named host list
6249 was in use, was not putting the data itself into the right store pool;
6250 consequently, it could be overwritten for a subsequent message in the same
6251 SMTP connection. (Fix 4.40/11 dealt with the non-cache case, but overlooked
6254 38. Sometimes the final signoff response after QUIT could fail to get
6255 transmitted in the non-TLS case. Testing !tls_active instead of tls_active
6256 < 0 before doing a fflush(). This bug looks as though it goes back to the
6257 introduction of TLS in release 3.20, but "sometimes" must have been rare
6258 because the tests only now provoked it.
6264 1. Fixed a longstanding but relatively impotent bug: a long time ago, before
6265 PIPELINING, the function smtp_write_command() used to return TRUE or FALSE.
6266 Now it returns an integer. A number of calls were still expecting a T/F
6267 return. Fortuitously, in all cases, the tests worked in OK situations,
6268 which is the norm. However, things would have gone wrong on any write
6269 failures on the smtp file descriptor. This function is used when sending
6270 messages over SMTP and also when doing verify callouts.
6272 2. When Exim is called to do synchronous delivery of a locally submitted
6273 message (the -odf or -odi options), it no longer closes stderr before doing
6276 3. Implemented the mua_wrapper option.
6278 4. Implemented mx_fail_domains and srv_fail_domains for the dnslookup router.
6280 5. Implemented the functions header_remove(), header_testname(),
6281 header_add_at_position(), and receive_remove_recipient(), and exported them
6284 6. If an ACL "warn" statement specified the addition of headers, Exim already
6285 inserted X-ACL-Warn: at the start if there was no header name. However, it
6286 was not making this test for the second and subsequent header lines if
6287 there were newlines in the string. This meant that an invalid header could
6288 be inserted if Exim was badly configured.
6290 7. Allow an ACL "warn" statement to add header lines at the start or after all
6291 the Received: headers, as well as at the end.
6293 8. Added the rcpt_4xx retry error code.
6295 9. Added postmaster_mailfrom=xxx to callout verification option.
6297 10. Added mailfrom=xxxx to the callout verification option, for verify=
6300 11. ${substr_1_:xxxx} and ${substr__3:xxxx} are now diagnosed as syntax errors
6301 (they previously behaved as ${substr_1_0:xxxx} and ${substr:_0_3:xxxx}).
6303 12. Inserted some casts to stop certain compilers warning when using pointer
6304 differences as field lengths or precisions in printf-type calls (mostly
6305 affecting debugging statements).
6307 13. Added optional readline() support for -be (dynamically loaded).
6309 14. Obscure bug fix: if a message error (e.g. 4xx to MAIL) happened within the
6310 same clock tick as a message's arrival, so that its received time was the
6311 same as the "first fail" time on the retry record, and that message
6312 remained on the queue past the ultimate address timeout, every queue runner
6313 would try a delivery (because it was past the ultimate address timeout) but
6314 after another failure, the ultimate address timeout, which should have then
6315 bounced the address, did not kick in. This was a "< instead of <=" error;
6316 in most cases the first failure would have been in the next clock tick
6317 after the received time, and all would be well.
6319 15. The special items beginning with @ in domain lists (e.g. @mx_any) were not
6320 being recognized when the domain list was tested by the match_domain
6321 condition in an expansion string.
6323 16. Added the ${str2b64: operator.
6325 17. Exim was always calling setrlimit() to set a large limit for the number of
6326 processes, without checking whether the existing limit was already
6327 adequate. (It did check for the limit on file descriptors.) Furthermore,
6328 errors from getrlimit() and setrlimit() were being ignored. Now they are
6329 logged to the main and panic logs, but Exim does carry on, to try to do its
6330 job under whatever limits there are.
6332 18. Imported PCRE 5.0.
6334 19. Trivial typo in log message " temporarily refused connection" (the leading
6337 20. If the log selector return_path_on_delivery was set and an address was
6338 redirected to /dev/null, the delivery process crashed because it assumed
6339 that a return path would always be set for a "successful" delivery. In this
6340 case, the whole delivery is bypassed as an optimization, and therefore no
6343 21. Internal re-arrangement: the function for sending a challenge and reading
6344 a response while authentication was assuming a zero-terminated challenge
6345 string. It's now changed to take a pointer and a length, to allow for
6346 binary data in such strings.
6348 22. Added the cyrus_sasl authenticator (code supplied by MBM).
6350 23. Exim was not respecting finduser_retries when seeking the login of the
6351 uid under which it was called; it was always trying 10 times. (The default
6352 setting of finduser_retries is zero.) Also, it was sleeping after the final
6353 failure, which is pointless.
6355 24. Implemented tls_on_connect_ports.
6357 25. Implemented acl_smtp_predata.
6359 26. If the domain in control=submission is set empty, Exim assumes that the
6360 authenticated id is a complete email address when it generates From: or
6361 Sender: header lines.
6363 27. Added "#define SOCKLEN_T int" to OS/os.h-SCO and OS/os.h-SCO_SV. Also added
6364 definitions to OS/Makefile-SCO and OS/Makefile-SCO_SV that put basename,
6365 chown and chgrp in /bin and hostname in /usr/bin.
6367 28. Exim was keeping the "process log" file open after each use, just as it
6368 does for the main log. This opens the possibility of it remaining open for
6369 long periods when the USR1 signal hits a daemon. Occasional processlog
6370 errors were reported, that could have been caused by this. Anyway, it seems
6371 much more sensible not to leave this file open at all, so that is what now
6374 29. The long-running daemon process does not normally write to the log once it
6375 has entered its main loop, and it closes the log before doing so. This is
6376 so that log files can straightforwardly be renamed and moved. However,
6377 there are a couple of unusual error situations where the daemon does write
6378 log entries, and I had neglected to close the log afterwards.
6380 30. The text of an SMTP error response that was received during a remote
6381 delivery was being truncated at 512 bytes. This is too short for some of
6382 the long messages that one sometimes sees. I've increased the limit to
6385 31. It is now possible to make retry rules that apply only when a message has a
6386 specific sender, in particular, an empty sender.
6388 32. Added "control = enforce_sync" and "control = no_enforce_sync". This makes
6389 it possible to be selective about when SMTP synchronization is enforced.
6391 33. Added "control = caseful_local_part" and "control = "caselower_local_part".
6393 32. Implemented hosts_connection_nolog.
6395 33. Added an ACL for QUIT.
6397 34. Setting "delay_warning=" to disable warnings was not working; it gave a
6400 35. Added mailbox_size and mailbox_filecount to appendfile.
6402 36. Added control = no_multiline_responses to ACLs.
6404 37. There was a bug in the logic of the code that waits for the clock to tick
6405 in the case where the clock went backwards by a substantial amount such
6406 that the microsecond fraction of "now" was more than the microsecond
6407 fraction of "then" (but the whole seconds number was less).
6409 38. Added support for the libradius Radius client library this is found on
6410 FreeBSD (previously only the radiusclient library was supported).
6416 1. When certain lookups returned multiple values in the form name=value, the
6417 quoting of the values was not always being done properly. Specifically:
6418 (a) If the value started with a double quote, but contained no whitespace,
6420 (b) If the value contained whitespace other than a space character (i.e.
6421 tabs or newlines or carriage returns) it was not quoted.
6422 This fix has been applied to the mysql and pgsql lookups by writing a
6423 separate quoting function and calling it from the lookup code. The fix
6424 should probably also be applied to nisplus, ibase and oracle lookups, but
6425 since I cannot test any of those, I have not disturbed their existing code.
6427 2. A hit in the callout cache for a specific address caused a log line with no
6428 reason for rejecting RCPT. Now it says "Previous (cached) callout
6429 verification failure".
6431 3. There was an off-by-one bug in the queryprogram router. An over-long
6432 return line was truncated at 256 instead of 255 characters, thereby
6433 overflowing its buffer with the terminating zero. As well as fixing this, I
6434 have increased the buffer size to 1024 (and made a note to document this).
6436 4. If an interrupt, such as the USR1 signal that is send by exiwhat, arrives
6437 when Exim is waiting for an SMTP response from a remote server, Exim
6438 restarts its select() call on the socket, thereby resetting its timeout.
6439 This is not a problem when such interrupts are rare. Somebody set up a cron
6440 job to run exiwhat every 2 minutes, which is less than the normal select()
6441 timeout (5 or 10 minutes). This meant that the select() timeout never
6442 kicked in because it was always reset. I have fixed this by comparing the
6443 time when an interrupt arrives with the time at the start of the first call
6444 to select(). If more time than the timeout has elapsed, the interrupt is
6445 treated as a timeout.
6447 5. Some internal re-factoring in preparation for the addition of Sieve
6448 extensions (by MH). In particular, the "personal" test is moved to a
6449 separate function, and given an option for scanning Cc: and Bcc: (which is
6450 not set for Exim filters).
6452 6. When Exim created an email address using the login of the caller as the
6453 local part (e.g. when creating a From: or Sender: header line), it was not
6454 quoting the local part when it contained special characters such as @.
6456 7. Installed new OpenBSD configuration files.
6458 8. Reworded some messages for syntax errors in "and" and "or" conditions to
6459 try to make them clearer.
6461 9. Callout options, other than the timeout value, were being ignored when
6462 verifying sender addresses in header lines. For example, when using
6464 verify = header_sender/callout=no_cache
6466 the cache was (incorrectly) being used.
6468 10. Added a missing instance of ${EXE} to the exim_install script; this affects
6469 only the Cygwin environment.
6471 11. When return_path_on_delivery was set as a log selector, if different remote
6472 addresses in the same message used different return paths and parallel
6473 remote delivery occurred, the wrong values would sometimes be logged.
6474 (Whenever a remote delivery process finished, the return path value from
6475 the most recently started remote delivery process was logged.)
6477 12. RFC 3848 specifies standard names for the "with" phrase in Received: header
6478 lines when AUTH and/or TLS are in use. This is the "received protocol"
6479 field. Exim used to use "asmtp" for authenticated SMTP, without any
6480 indication (in the protocol name) for TLS use. Now it follows the RFC and
6481 uses "esmtpa" if the connection is authenticated, "esmtps" if it is
6482 encrypted, and "esmtpsa" if it is both encrypted and authenticated. These
6483 names appear in log lines as well as in Received: header lines.
6485 13. Installed MH's patches for Sieve to add the "copy" and "vacation"
6486 extensions, and comparison tests, and to fix some bugs.
6488 14. Changes to the "personal" filter test:
6490 (1) The test was buggy in that it was just doing the equivalent of
6491 "contains" tests on header lines. For example, if a user's address was
6492 anne@some.where, the "personal" test would incorrectly be true for
6494 To: susanne@some.where
6496 This test is now done by extracting each address from the header in turn,
6497 and checking the entire address. Other tests that are part of "personal"
6498 are now done using regular expressions (for example, to check local parts
6499 of addresses in From: header lines).
6501 (2) The list of non-personal local parts in From: addresses has been
6502 extended to include "listserv", "majordomo", "*-request", and "owner-*",
6503 taken from the Sieve specification recommendations.
6505 (3) If the message contains any header line starting with "List-" it is
6506 treated as non-personal.
6508 (4) The test for "circular" in the Subject: header line has been removed
6509 because it now seems ill-conceived.
6511 15. Minor typos in src/EDITME comments corrected.
6513 16. Installed latest exipick from John Jetmore.
6515 17. If headers_add on a router specified a text string that was too long for
6516 string_sprintf() - that is, longer than 8192 bytes - Exim panicked. The use
6517 of string_sprintf() is now avoided.
6519 18. $message_body_size was not set (it was always zero) when running the DATA
6520 ACL and the local_scan() function.
6522 19. For the "mail" command in an Exim filter, no default was being set for
6523 the once_repeat time, causing a random time value to be used if "once" was
6524 specified. (If the value happened to be <= 0, no repeat happened.) The
6525 default is now 0s, meaning "never repeat". The "vacation" command was OK
6526 (its default is 7d). It's somewhat surprising nobody ever noticed this bug
6527 (I found it when inspecting the code).
6529 20. There is now an overall timeout for performing a callout verification. It
6530 defaults to 4 times the callout timeout, which applies to individual SMTP
6531 commands during the callout. The overall timeout applies when there is more
6532 than one host that can be tried. The timeout is checked before trying the
6533 next host. This prevents very long delays if there are a large number of
6534 hosts and all are timing out (e.g. when the network connections are timing
6535 out). The value of the overall timeout can be changed by specifying an
6536 additional sub-option for "callout", called "maxwait". For example:
6538 verify = sender/callout=5s,maxwait=20s
6540 21. Add O_APPEND to the open() call for maildirsize files (Exim already seeks
6541 to the end before writing, but this should make it even safer).
6543 22. Exim was forgetting that it had advertised PIPELINING for the second and
6544 subsequent messages on an SMTP connection. It was also not resetting its
6545 memory on STARTTLS and an internal HELO.
6547 23. When Exim logs an SMTP synchronization error within a session, it now
6548 records whether PIPELINING has been advertised or not.
6550 24. Added 3 instances of "(long int)" casts to time_t variables that were being
6551 formatted using %ld, because on OpenBSD (and perhaps others), time_t is int
6552 rather than long int.
6554 25. Installed the latest Cygwin configuration files from the Cygwin maintainer.
6556 26. Added the never_mail option to autoreply.
6562 1. A reorganization of the code in order to implement 4.40/8 caused a daemon
6563 crash if the getsockname() call failed; this can happen if a connection is
6564 closed very soon after it is established. The problem was simply in the
6565 order in which certain operations were done, causing Exim to try to write
6566 to the SMTP stream before it had set up the file descriptor. The bug has
6567 been fixed by making things happen in the correct order.
6573 1. If "drop" was used in a DATA ACL, the SMTP output buffer was not flushed
6574 before the connection was closed, thus losing the rejection response.
6576 2. Commented out the definition of SOCKLEN_T in os.h-SunOS5. It is needed for
6577 some early Solaris releases, but causes trouble in current releases where
6578 socklen_t is defined.
6580 3. When std{in,out,err} are closed, re-open them to /dev/null so that they
6583 4. Minor refactoring of os.c-Linux to avoid compiler warning when IPv6 is not
6586 5. Refactoring in expand.c to improve memory usage. Pre-allocate a block so
6587 that releasing the top of it at the end releases what was used for sub-
6588 expansions (unless the block got too big). However, discard this block if
6589 the first thing is a variable or header, so that we can use its block when
6590 it is dynamic (useful for very large $message_headers, for example).
6592 6. Lookups now cache *every* query, not just the most recent. A new, separate
6593 store pool is used for this. It can be recovered when all lookup caches are
6594 flushed. Lookups now release memory at the end of their result strings.
6595 This has involved some general refactoring of the lookup sources.
6597 7. Some code has been added to the store_xxx() functions to reduce the amount
6598 of flapping under certain conditions.
6600 8. log_incoming_interface used to affect only the <= reception log lines. Now
6601 it causes the local interface and port to be added to several more SMTP log
6602 lines, for example "SMTP connection from", and rejection lines.
6604 9. The Sieve author supplied some patches for the doc/README.SIEVE file.
6606 10. Added a conditional definition of _BSD_SOCKLEN_T to os.h-Darwin.
6608 11. If $host_data was set by virtue of a hosts lookup in an ACL, its value
6609 could be overwritten at the end of the current message (or the start of a
6610 new message if it was set in a HELO ACL). The value is now preserved for
6611 the duration of the SMTP connection.
6613 12. If a transport had a headers_rewrite setting, and a matching header line
6614 contained an unqualified address, that address was qualified, even if it
6615 did not match any rewriting rules. The underlying bug was that the values
6616 of the flags that permit the existence of unqualified sender and recipient
6617 addresses in header lines (set by {sender,recipient}_unqualified_hosts for
6618 non-local messages, and by -bnq for local messages) were not being
6619 preserved with the message after it was received.
6621 13. When Exim was logging an SMTP synchronization error, it could sometimes log
6622 "next input=" as part of the text comprising the host identity instead of
6623 the correct text. The code was using the same buffer for two different
6624 strings. However, depending on which order the printing function evaluated
6625 its arguments, the bug did not always show up. Under Linux, for example, my
6626 test suite worked just fine.
6628 14. Exigrep contained a use of Perl's "our" scoping after change 4.31/70. This
6629 doesn't work with some older versions of Perl. It has been changed to "my",
6630 which in any case is probably the better facility to use.
6632 15. A really picky compiler found some instances of statements for creating
6633 error messages that either had too many or two few arguments for the format
6636 16. The size of the buffer for calls to the DNS resolver has been increased
6637 from 1024 to 2048. A larger buffer is needed when performing PTR lookups
6638 for addresses that have a lot of PTR records. This alleviates a problem; it
6639 does not fully solve it.
6641 17. A dnsdb lookup for PTR records that receives more data than will fit in the
6642 buffer now truncates the list and logs the incident, which is the same
6643 action as happens when Exim is looking up a host name and its aliases.
6644 Previously in this situation something unpredictable would happen;
6645 sometimes it was "internal error: store_reset failed".
6647 18. If a server dropped the connection unexpectedly when an Exim client was
6648 using GnuTLS and trying to read a response, the client delivery process
6649 crashed while trying to generate an error log message.
6651 19. If a "warn" verb in an ACL added multiple headers to a message in a single
6652 string, for example:
6654 warn message = H1: something\nH2: something
6656 the text was added as a single header line from Exim's point of view
6657 though it ended up OK in the delivered message. However, searching for the
6658 second and subsequent header lines using $h_h2: did not work. This has been
6659 fixed. Similarly, if a system filter added multiple headers in this way,
6660 the routers could not see them.
6662 20. Expanded the error message when iplsearch is called with an invalid key to
6663 suggest using net-iplsearch in a host list.
6665 21. When running tests using -bh, any delays imposed by "delay" modifiers in
6666 ACLs are no longer actually imposed (and a message to that effect is
6669 22. If a "gecos" field in a passwd entry contained escaped characters, in
6670 particular, if it contained a \" sequence, Exim got it wrong when building
6671 a From: or a Sender: header from that name. A second bug also caused
6672 incorrect handling when an unquoted " was present following a character
6673 that needed quoting.
6675 23. "{crypt}" as a password encryption mechanism for a "crypteq" expansion item
6676 was not being matched caselessly.
6678 24. Arranged for all hyphens in the exim.8 source to be escaped with
6681 25. Change 16 of 4.32, which reversed 71 or 4.31 didn't quite do the job
6682 properly. Recipient callout cache records were still being keyed to include
6683 the sender, even when use_sender was set false. This led to far more
6684 callouts that were necessary. The sender is no longer included in the key
6685 when use_sender is false.
6687 26. Added "control = submission" modifier to ACLs.
6689 27. Added the ${base62d: operator to decode base 62 numbers.
6691 28. dnsdb lookups can now access SRV records.
6693 29. CONFIGURE_OWNER can be set at build time to define an alternative owner for
6694 the configuration file.
6696 30. The debug message "delivering xxxxxx-xxxxxx-xx" is now output in verbose
6697 (-v) mode. This makes the output for a verbose queue run more intelligible.
6699 31. Added a use_postmaster feature to recipient callouts.
6701 32. Added the $body_zerocount variable, containing the number of binary zero
6702 bytes in the message body.
6704 33. The time of last modification of the "new" subdirectory is now used as the
6705 "mailbox time last read" when there is a quota error for a maildir
6708 34. Added string comparison operators lt, lti, le, lei, gt, gti, ge, gei.
6710 35. Added +ignore_unknown as a special item in host lists.
6712 36. Code for decoding IPv6 addresses in host lists is now included, even if
6713 IPv6 support is not being compiled. This fixes a bug in which an IPv6
6714 address was recognized as an IP address, but was then not correctly decoded
6715 into binary, causing unexpected and incorrect effects when compared with
6722 1. Very minor rewording of debugging text in manualroute to say "list of
6723 hosts" instead of "hostlist".
6725 2. If verify=header_syntax was set, and a header line with an unqualified
6726 address (no domain) and a large number of spaces between the end of the
6727 name and the colon was received, the reception process suffered a buffer
6728 overflow, and (when I tested it) crashed. This was caused by some obsolete
6729 code that should have been removed. The fix is to remove it!
6731 3. When running in the test harness, delay a bit after writing a bounce
6732 message to get a bit more predictability in the log output.
6734 4. Added a call to search_tidyup() just before forking a reception process. In
6735 theory, someone could use a lookup in the expansion of smtp_accept_max_
6736 per_host which, without the tidyup, could leave open a database connection.
6738 5. Added the variables $recipient_data and $sender_data which get set from a
6739 lookup success in an ACL "recipients" or "senders" condition, or a router
6740 "senders" option, similar to $domain_data and $local_part_data.
6742 6. Moved the writing of debug_print from before to after the "senders" test
6745 7. Change 4.31/66 (moving the time when the Received: is generated) caused
6746 problems for message scanning, either using a data ACL, or using
6747 local_scan() because the Received: header was not generated till after they
6748 were called (in order to set the time as the time of reception completion).
6749 I have revised the way this works. The header is now generated after the
6750 body is received, but before the ACL or local_scan() are called. After they
6751 are run, the timestamp in the header is updated.
6757 1. Change 4.24/6 introduced a bug because the SIGALRM handler was disabled
6758 before starting a queue runner without re-exec. This happened only when
6759 deliver_drop_privilege was set or when the Exim user was set to root. The
6760 effect of the bug was that timeouts during subsequent deliveries caused
6761 crashes instead of being properly handled. The handler is now left at its
6762 default (and expected) setting.
6764 2. The other case in which a daemon avoids a re-exec is to deliver an incoming
6765 message, again when deliver_drop_privilege is set or Exim is run as root.
6766 The bug described in (1) was not present in this case, but the tidying up
6767 of the other signals was missing. I have made the two cases consistent.
6769 3. The ignore_target_hosts setting on a manualroute router was being ignored
6770 for hosts that were looked up using the /MX notation.
6772 4. Added /ignore=<ip list> feature to @mx_any, @mx_primary, and @mx_secondary
6775 5. Change 4.31/55 was buggy, and broke when there was a rewriting rule that
6776 operated on the sender address. After changing the $sender_address to <>
6777 for the sender address verify, Exim was re-instated it as the original
6778 (before rewriting) address, but remembering that it had rewritten it, so it
6779 wasn't rewriting it again. This bug also had the effect of breaking the
6780 sender address verification caching when the sender address was rewritten.
6782 6. The ignore_target_hosts option was being ignored by the ipliteral router.
6783 This has been changed so that if the ip literal address matches
6784 ignore_target_hosts, the router declines.
6786 7. Added expansion conditions match_domain, match_address, and match_local_
6787 part (NOT match_host).
6789 8. The placeholder for the Received: header didn't have a length field set.
6791 9. Added code to Exim itself and to exim_lock to test for a specific race
6792 condition that could lead to file corruption when using MBX delivery. The
6793 issue is with the lockfile that is created in /tmp. If this file is removed
6794 after a process has opened it but before that process has acquired a lock,
6795 there is the potential for a second process to recreate the file and also
6796 acquire a lock. This could lead to two Exim processes writing to the file
6797 at the same time. The added code performs the same test as UW imapd; it
6798 checks after acquiring the lock that its file descriptor still refers to
6799 the same named file.
6801 10. The buffer for building added header lines was of fixed size, 8192 bytes.
6802 It is now parameterized by HEADER_ADD_BUFFER_SIZE and this can be adjusted
6805 11. Added the smtp_active_hostname option. If used, this will typically be made
6806 to depend on the incoming interface address. Because $interface_address is
6807 not set up until the daemon has forked a reception process, error responses
6808 that can happen earlier (such as "too many connections") no longer contain
6811 12. If an expansion in a condition on a "warn" statement fails because a lookup
6812 defers, the "warn" statement is abandoned, and the next ACL statement is
6813 processed. Previously this caused the whole ACL to be aborted.
6815 13. Added the iplsearch lookup type.
6817 14. Added ident_timeout as a log selector.
6819 15. Added tls_certificate_verified as a log selector.
6821 16. Added a global option tls_require_ciphers (compare the smtp transport
6822 option of the same name). This controls incoming TLS connections.
6824 17. I finally figured out how to make tls_require_ciphers do a similar thing
6825 in GNUtls to what it does in OpenSSL, that is, set up an appropriate list
6826 before starting the TLS session.
6828 18. Tabs are now shown as \t in -bP output.
6830 19. If the log selector return_path_on_delivery was set, Exim crashed when
6831 bouncing a message because it had too many Received: header lines.
6833 20. If two routers both had headers_remove settings, and the first one included
6834 a superfluous trailing colon, the final name in the first list and the
6835 first name in the second list were incorrectly joined into one item (with a
6836 colon in the middle).
6842 1. Added -C and -D options to the exinext utility, mainly to make it easier
6843 to include in the automated testing, but these could be helpful when
6844 multiple configurations are in use.
6846 2. The exinext utility was not formatting the output nicely when there was
6847 an alternate port involved in the retry record key, nor when there was a
6848 message id as well (for retries that were specific to a specific message
6849 and a specific host). It was also confused by IPv6 addresses, because of
6850 the additional colons they contain. I have fixed the IPv4 problem, and
6851 patched it up to do a reasonable job for IPv6.
6853 3. When there is an error after a MAIL, RCPT, or DATA SMTP command during
6854 delivery, the log line now contains "pipelined" if PIPELINING was used.
6856 4. An SMTP transport process used to panic and die if the bind() call to set
6857 an explicit outgoing interface failed. This has been changed; it is now
6858 treated in the same way as a connect() failure.
6860 5. A reference to $sender_host_name in the part of a conditional expansion
6861 that was being skipped was still causing a DNS lookup. This no longer
6864 6. The def: expansion condition was not recognizing references to header lines
6865 that used bh_ and bheader_.
6867 7. Added the _cache feature to named lists.
6869 8. The code for checking quota_filecount in the appendfile transport was
6870 allowing one more file than it should have been.
6872 9. For compatibility with Sendmail, the command line option
6880 and sets the incoming protocol and host name (for trusted callers). The
6881 host name and its colon can be omitted when only the protocol is to be set.
6882 Note the Exim already has two private options, -pd and -ps, that refer to
6883 embedded Perl. It is therefore impossible to set a protocol value of "d" or
6884 "s", but I don't think that's a major issue.
6886 10. A number of refactoring changes to the code, none of which should affect
6889 (a) The number of logging options was getting close to filling up the
6890 32-bit word that was used as a bit map. I have split them into two classes:
6891 those that are passed in the argument to log_write(), and those that are
6892 only ever tested independently outside of that function. These are now in
6893 separate 32-bit words, so there is plenty of room for expansion again.
6894 There is no change in the user interface or the logging behaviour.
6896 (b) When building, for example, log lines, the code previously used a
6897 macro that called string_cat() twice, in order to add two strings. This is
6898 not really sufficiently general. Furthermore, there was one instance where
6899 it was actually wrong because one of the argument was used twice, and in
6900 one call a function was used. (As it happened, calling the function twice
6901 did not affect the overall behaviour.) The macro has been replaced by a
6902 function that can join an arbitrary number of extra strings onto a growing
6905 (c) The code for expansion conditions now uses a table and a binary chop
6906 instead of a serial search (which was left over from when there were very
6907 few conditions). Also, it now recognizes conditions like "pam" even when
6908 the relevant support is not compiled in: a suitably worded error message is
6909 given if an attempt is made to use such a condition.
6911 11. Added ${time_interval:xxxxx}.
6913 12. A bug was causing one of the ddress fields not to be passed back correctly
6914 from remote delivery subprocesses. The field in question was not being
6915 subsequently used, so this caused to problems in practice.
6917 13. Added new log selectors queue_time and deliver_time.
6919 14. Might have fixed a bug in maildirsizefile handling that threw up
6920 "unexpected character" debug warnings, and recalculated the data
6921 unnecessarily. In any case, I expanded the warning message to give more
6924 15. Added the message "Restricted characters in address" to the statements in
6925 the default ACL that block characters like @ and % in local parts.
6927 16. Change 71 for release 4.31 proved to be much less benign that I imagined.
6928 Three changes have been made:
6930 (a) There was a serious bug; a negative response to MAIL caused the whole
6931 recipient domain to be cached as invalid, thereby blocking all messages
6932 to all local parts at the same domain, from all senders. This bug has
6933 been fixed. The domain is no longer cached after a negative response to
6934 MAIL if the sender used is not empty.
6936 (b) The default behaviour of using MAIL FROM:<> for recipient callouts has
6939 (c) A new callout option, "use_sender" has been added for people who want
6940 the modified behaviour.
6946 1. Removed "EXTRALIBS=-lwrap" from OS/Makefile-Unixware7 on the advice of
6949 2. Removed "LIBS = -lresolv" from OS/Makefile-Darwin as it is not needed, and
6950 indeed breaks things for older releases.
6952 3. Added additional logging to the case where there is a problem reading data
6953 from a filter that is running in a subprocess using a pipe, in order to
6954 try to track down a specific problem.
6956 4. Testing facility fudge: when running in the test harness and attempting
6957 to connect to 10.x.x.x (expecting a connection timeout) I'm now sometimes
6958 getting "No route to host". Convert this to a timeout.
6960 5. Define ICONV_ARG2_TYPE as "char **" for Unixware7 to avoid compiler
6963 6. Some OS don't have socklen_t but use size_t instead. This affects the
6964 fifth argument of getsockopt() amongst other things. This is now
6965 configurable by a macro called SOCKLEN_T which defaults to socklen_t, but
6966 can be set for individual OS. I have set it for SunOS5, OSF1, and
6967 Unixware7. Current versions of SunOS5 (aka Solaris) do have socklen_t, but
6968 some earlier ones do not.
6970 7. Change 4.30/15 was not doing the test caselessly.
6972 8. The standard form for an IPv6 address literal was being rejected by address
6973 parsing in, for example, MAIL and RCPT commands. An example of this kind of
6974 address is [IPv6:2002:c1ed:8229:10:202:2dff:fe07:a42a]. Exim now accepts
6975 this, as well as the form without the "IPv6" on the front (but only when
6976 address literals are enabled, of course).
6978 9. Added some casts to avoid compiler warnings in OS/os.c-Linux.
6980 10. Exim crashed if a message with an empty sender address specified by -f
6981 encountered a router with an errors_to setting. This could be provoked only
6982 by a command such as
6986 where an empty string was supplied; "<>" did not hit this bug.
6988 11. Installed PCRE release 4.5.
6990 12. If EHLO/HELO was rejected by an ACL, the value of $sender_helo_name
6991 remained set. It is now erased.
6993 13. exiqgrep wasn't working on MacOS X because it didn't correctly compute
6994 times from message ids (which are base 36 rather than the normal 62).
6996 14. "Expected" SMTP protocol errors that can arise when PIPELINING is in use
6997 were being counted as actual protocol errors, and logged if the log
6998 selector +smtp_protocol_error was set. One cannot be perfect in this test,
6999 but now, if PIPELINING has been advertised, RCPT following a rejected MAIL,
7000 and DATA following a set of rejected RCPTs do not count as protocol errors.
7001 In other words, Exim assumes they were pipelined, though this may not
7002 actually be the case. Of course, in all cases the client gets an
7003 appropriate error code.
7005 15. If a lookup fails in an ACL condition, a message about the failure may
7006 be available; it is used if testing the ACL cannot continue, because most
7007 such messages specify what the cause of the deferral is. However, some
7008 messages (e.g. "MYSQL: no data found") do not cause a defer. There was bug
7009 that caused an old message to be retained and used if a later statement
7010 caused a defer, replacing the real cause of the deferral.
7012 16. If an IP address had so many PTR records that the DNS lookup buffer
7013 was not large enough to hold them, Exim could crash while trying to process
7014 the truncated data. It now detects and logs this case.
7016 17. Further to 4.21/58, another change has been made: if (and only if) the
7017 first line of a message (the first header line) ends with CRLF, a bare LF
7018 in a subsequent header line has a space inserted after it, so as not to
7019 terminate the header.
7021 18. Refactoring: tidied an ugly bit of code in appendfile that copied data
7022 unnecessarily, used atoi() instead of strtol(), and didn't check the
7023 termination when getting file sizes from file names by regex.
7025 19. Completely re-implemented the support for maildirsize files, in the light
7026 of a number of problems with the previous contributed implementation
7027 (4.30/29). In particular:
7029 . If the quota is zero, the maildirsize file is maintained, but no quota is
7032 . If the maildir directory does not exist, it is created before any attempt
7033 to write a maildirsize file.
7035 . The quota value in the file is just a cache; if the quota is changed in
7036 the transport, the new value overrides.
7038 . A regular expression is available for excluding directories from the
7041 20. The autoreply transport checks the characters in options that define the
7042 message's headers; it allows continued headers, but it was checking with
7043 isspace() after an embedded newline instead of explicitly looking for a
7046 21. If all the "regular" hosts to which an address was routed had passed their
7047 expiry times, and had not reached their retry times, the address was
7048 bounced, even if fallback hosts were defined. Now Exim should go on to try
7051 22. Increased buffer sizes in the callout code from 1024 to 4096 to match the
7052 equivalent code in the SMTP transport. Some hosts send humungous responses
7053 to HELO/EHLO, more than 1024 it seems.
7055 23. Refactoring: code in filter.c used (void *) for "any old type" but this
7056 gives compiler warnings in some environments. I've now done it "properly",
7059 24. The replacement for inet_ntoa() that is used with gcc on IRIX systems
7060 (because of problems with the built-in one) was declared to return uschar *
7061 instead of char *, causing compiler failure.
7063 25. Fixed a file descriptor leak when processing alias/forward files.
7065 26. Fixed a minor format string issue in dbfn.c.
7067 27. Typo in exim.c: ("dmbnz" for "dbmnz").
7069 28. If a filter file refered to $h_xxx or $message_headers, and the headers
7070 contained RFC 2047 "words", Exim's memory could, under certain conditions,
7073 29. When a sender address is verified, it is cached, to save repeating the test
7074 when there is more than one recipient in a message. However, when the
7075 verification involves a callout, it is possible for different callout
7076 options to be set for different recipients. It is too complicated to keep
7077 track of this in the cache, so now Exim always runs a verification when a
7078 callout is required, relying on the callout cache for the optimization.
7079 The overhead is duplication of the address routing, but this should not be
7082 30. Fixed a bug in callout caching. If a RCPT command caused the sender address
7083 to be verified with callout=postmaster, and the main callout worked but the
7084 postmaster check failed, the verification correctly failed. However, if a
7085 subsequent RCPT command asked for sender verification *without* the
7086 postmaster check, incorrect caching caused this verification also to fail,
7089 31. Exim caches DNS lookup failures so as to avoid multiple timeouts; however,
7090 it was not caching the DNS options (qualify_single, search_parents) that
7091 were used when the lookup failed. A subsequent lookup with different
7092 options therefore always gave the same answer, though there were cases
7093 where it should not have. (Example: a "domains = !$mx_any" option on a
7094 dnslookup router: the "domains" option is always processed without any
7095 widening, but the router might have qualify_single set.) Now Exim uses the
7096 cached value only when the same options are set.
7098 32. Added John Jetmore's "exipick" utility to the distribution.
7100 33. GnuTLS: When an attempt to start a TLS session fails for any reason other
7101 than a timeout (e.g. a certificate is required, and is not provided), an
7102 Exim server now closes the connection immediately. Previously it waited for
7103 the client to close - but if the client is SSL, it seems that they each
7104 wait for each other, leading to a delay before one of them times out.
7106 34: GnuTLS: Updated the code to use the new GnuTLS 1.0.0 API. I have not
7107 maintained 0.8.x compatibility because I don't think many are using it, and
7108 it is clearly obsolete.
7110 35. Added TLS support for CRLs: a tls_crl global option and one for the smtp
7113 36. OpenSSL: $tls_certificate_verified was being set to 1 even if the
7114 client certificate was expired. A simple patch fixes this, though I don't
7115 understand the full logic of why the verify callback is called multiple
7118 37. OpenSSL: a patch from Robert Roselius: "Enable client-bug workaround.
7119 Versions of OpenSSL as of 0.9.6d include a 'CBC countermeasure' feature,
7120 which causes problems with some clients (such as the Certicom SSL Plus
7121 library used by Eudora). This option, SSL_OP_DONT_INSERT_EMPTY_FRAGMENTS,
7122 disables the coutermeasure allowing Eudora to connect."
7124 38. Exim was not checking that a write() to a log file succeeded. This could
7125 lead to Bad Things if a log got too big, in particular if it hit a file
7126 size limit. Exim now panics and dies if it cannot write to a log file, just
7127 as it does if it cannot open a log file.
7129 39. Modified OS/Makefile-Linux so that it now contains
7131 CFLAGS=-O -D_FILE_OFFSET_BITS=64 -D_LARGEFILE_SOURCE
7133 The two -D definitions ensure that Exim is compiled with large file
7134 support, which makes it possible to handle log files that are bigger than
7137 40. Fixed a subtle caching bug: if (in an ACL or a set of routers, for
7138 instance) a domain was checked against a named list that involved a lookup,
7139 causing $domain_data to be set, then another domain was checked against the
7140 same list, then the first domain was re-checked, the value of $domain_data
7141 after the final check could be wrong. In particular, if the second check
7142 failed, it could be set empty. This bug probably also applied to
7145 41. The strip_trailing_dot option was not being applied to the address given
7146 with the -f command-line option.
7148 42. The code for reading a message's header from the spool was incrementing
7149 $received_count, but never initializing it. This meant that the value was
7150 incorrect (doubled) while delivering a message in the same process in which
7151 it was received. In the most common configuration of Exim, this never
7152 happens - a fresh exec is done - but it can happen when
7153 deliver_drop_privilege is set.
7155 43. When Exim logs an SMTP synchronization error - client data sent too soon -
7156 it now includes up to 150 characters of the unexpected data in the log
7159 44. The exim_dbmbuild utility uses fixed size buffers for reading input lines
7160 and building data strings. The size of both of these buffers was 10 000
7161 bytes - far larger than anybody would *ever* want, thought I. Needless to
7162 say, somebody hit the limit. I have increased the maximum line length to
7163 20 000 and the maximum data length of concatenated lines to 100 000. I have
7164 also fixed two bugs, because there was no checking on these buffers. Tsk,
7165 tsk. Now exim_dbmbuild gives a message and exits with an error code if a
7166 buffer is too small.
7168 45. The exim_dbmbuild utility did not support quoted keys, as Exim does in
7169 lsearch lookups. Now it does.
7171 46. When parsing a route_list item in a manualroute router, a fixed-length
7172 buffer was used for the list of hosts. I made this 1024 bytes long,
7173 thinking that nobody would ever have a list of hosts that long. Wrong.
7174 Somebody had a whole pile of complicated expansion conditions, and the
7175 string was silently truncated, leading to an expansion error. It turns out
7176 that it is easier to change to an unlimited length (owing to other changes
7177 that have happened since this code was originally written) than to build
7178 structure for giving a limitation error. The length of the item that
7179 expands into the list of hosts is now unlimited.
7181 47. The lsearch lookup could not handle data where the length of text line was
7182 more than 4095 characters. Such lines were truncated, leading to shortened
7183 data being returned. It should now handle lines of any length.
7185 48. Minor wording revision: "cannot test xxx in yyy ACL" becomes "cannot test
7186 xxx condition in yyy ACL" (e.g. "cannot test domains condition in DATA
7189 49. Cosmetic tidy to scripts like exicyclog that are generated by globally
7190 replacing strings such as BIN_DIRECTORY in a source file: the replacement
7191 no longer happens in comment lines. A list of replacements is now placed
7192 at the head of all of the source files, except those whose only change is
7193 to replace PERL_COMMAND in the very first #! line.
7195 50. Replaced the slow insertion sort in queue.c, for sorting the list of
7196 messages on the queue, with a bottom-up merge sort, using code contributed
7197 by Michael Haardt. This should make operations like -bp somewhat faster on
7198 large queues. It won't affect queue runners, except when queue_run_in_order
7201 51. Installed eximstats 1.31 in the distribution.
7203 52. Added support for SRV lookups to the dnslookup router.
7205 53. If an ACL referred to $message_body or $message_body_end, the value was not
7206 reset for any messages that followed in the same SMTP session.
7208 54. The store-handling optimization for building very long strings was not
7209 differentiating between the different store pools. I don't think this
7210 actually made any difference in practice, but I've tidied it.
7212 55. While running the routers to verify a sender address, $sender_address
7213 was still set to the sender address. This is wrong, because when routing to
7214 send a bounce to the sender, it would be empty. Therefore, I have changed
7215 it so that, while verifying a sender address, $sender_address is set to <>.
7216 (There is no change to what happens when verifying a recipient address.)
7218 56. After finding MX (or SRV) records, Exim was doing a DNS lookup for the
7219 target A or AAAA records (if not already returned) without resetting the
7220 qualify_single or search_parents options of the DNS resolver. These are
7221 inappropriate in this case because the targets of MX and SRV records must
7222 be FQDNs. A broken DNS record could cause trouble if it happened to have a
7223 target that, when qualified, matched something in the local domain. These
7224 two options are now turned off when doing these lookups.
7226 57. It seems that at least some releases of Reiserfs (which does not have the
7227 concept of a fixed number of inodes) returns zero and not -1 for the
7228 number of available inodes. This interacted badly with check_spool_inodes,
7229 which assumed that -1 was the "no such thing" setting. What I have done is
7230 to check that the total number of inodes is greater than zero before doing
7231 the test of how many are available.
7233 58. When a "warn" ACL statement has a log_message modifier, the message is
7234 remembered, and not repeated. This is to avoid a lot of repetition when a
7235 message has many recipients that cause the same warning to be written.
7236 However, Exim was preserving the list of already written lines for an
7237 entire SMTP session, which doesn't seem right. The memory is now reset if a
7238 new message is started.
7240 59. The "rewrite" debugging flag was not showing the result of rewriting in the
7241 debugging output unless log_rewrite was also set.
7243 60. Avoid a compiler warning on 64-bit systems in dsearch.c by avoiding the use
7244 of (int)(handle) when we know that handle contains (void *)(-1).
7246 61. The Exim daemon panic-logs an error return when it closes the incoming
7247 connection. However "connection reset by peer" seems to be common, and
7248 isn't really an error worthy of noting specially, so that particular error
7251 62. When Exim is trying to find all the local interfaces, it used to panic and
7252 die if the ioctl to get the interface flags failed. However, it seems that
7253 on at least one OS (Solaris 9) it is possible to have an interface that is
7254 included in the list of interfaces, but for which you get a failure error
7255 for this call. This happens when the interface is not "plumbed" into a
7256 protocol (i.e. neither IPv4 nor IPv6). I've changed the code so that a
7257 failure of the "get flags" call assumes that the interface is down.
7259 63. Added a ${eval10: operator, which assumes all numbers are decimal. This
7260 makes life easier for people who are doing arithmetic on fields extracted
7261 from dates, where you often get leading zeros that should not be
7262 interpreted as octal.
7264 64. Added qualify_domain to the redirect router, to override the global
7267 65. If a pathologically long header line contained very many addresses (the
7268 report of this problem mentioned 10 000) and each of them was rewritten,
7269 Exim could use up a very large amount of memory. (It kept on making new
7270 copies of the header line as it rewrote, and never released the old ones.)
7271 At the expense of a bit more processing, the header rewriting function has
7272 been changed so that it no longer eats memory in this way.
7274 66. The generation of the Received: header has been moved from the time that a
7275 message starts to be received, to the time that it finishes. The timestamp
7276 in the Received: header should now be very close to that of the <= log
7277 line. There are two side-effects of this change:
7279 (a) If a message is rejected by a DATA or non-SMTP ACL or local_scan(), the
7280 logged header lines no longer include the local Received: line, because
7281 it has not yet been created. The same applies to a copy of the message
7282 that is returned to a non-SMTP sender when a message is rejected.
7284 (b) When a filter file is tested using -bf, no additional Received: header
7285 is added to the test message. After some thought, I decided that this
7288 This change does not affect the value of $received_for. It is still set
7289 after address rewriting, but before local_scan() is called.
7291 67. Installed the latest Cygwin-specific files from the Cygwin maintainer.
7293 68. GnuTLS: If an empty file is specified for tls_verify_certificates, GnuTLS
7294 gave an unhelpful panic error message, and a defer error. I have managed to
7295 change this behaviour so that it now rejects any supplied certificate,
7296 which seems right, as the list of acceptable certificates is empty.
7298 69. OpenSSL: If an empty file is specified for tls_verify_certificates, OpenSSL
7299 gave an unhelpful defer error. I have not managed to make this reject any
7300 supplied certificates, but the error message it gives is "no certificate
7301 supplied", which is not helpful.
7303 70. exigrep's output now also includes lines that are not associated with any
7304 message, but which match the given pattern. Implemented by a patch from
7305 Martin Sluka, which also tidied up the Perl a bit.
7307 71. Recipient callout verification, like sender verification, was using <> in
7308 the MAIL FROM command. This isn't really the right thing, since the actual
7309 sender may affect whether the remote host accepts the recipient or not. I
7310 have changed it to use the actual sender in the callout; this means that
7311 the cache record is now keyed on a recipient/sender pair, not just the
7312 recipient address. There doesn't seem to be a real danger of callout loops,
7313 since a callout by the remote host to check the sender would use <>.
7314 [SEE ABOVE: changed after hitting problems.]
7316 72. Exim treats illegal SMTP error codes that do not begin with 4 or 5 as
7317 temporary errors. However, in the case of such a code being given after
7318 the end of a data transmission (i.e. after ".") Exim was failing to write
7319 a retry record for the message. (Yes, there was some broken host that was
7320 actually sending 8xx at this point.)
7322 73. An unknown lookup type in a host list could cause Exim to panic-die when
7323 the list was checked. (An example that provoked this was putting <; in the
7324 middle of a list instead of at the start.) If this happened during a DATA
7325 ACL check, a -D file could be left lying around. This kind of configuration
7326 error no longer causes Exim to die; instead it causes a defer error. The
7327 incident is still logged to the main and panic logs.
7329 74. Buglet left over from Exim 3 conversion. The message "too many messages
7330 in one connection" was written to the rejectlog but not the mainlog, except
7331 when address rewriting (yes!) was being logged.
7333 75. Added write_rejectlog option.
7335 76. When a system filter was run not as root (that is, when system_filter_user
7336 was set), the values of the $n variables were not being returned to the
7337 main process; thus, they were not subsequently available in the $sn
7340 77. Added +return_path_on_delivery log selector.
7342 78. A connection timeout was being treated differently from recipients deferred
7343 when testing hosts_max_try with a message that was older than the host's
7344 retry timeout. (The host should not be counted, thus allowing all hosts to
7345 be tried at least once before bouncing.) This may have been the cause of an
7346 occasionally reported bug whereby a message would remain on the queue
7347 longer than the retry timeout, but would be bounced if a delivery was
7348 forced. I say "may" because I never totally pinned down the problem;
7349 setting up timeout/retry tests is difficult. See also the next item.
7351 79. The ultimate address timeout was not being applied to errors that involved
7352 a combination of host plus message (for example, a timeout on a MAIL
7353 command). When an address resolved to a number of possible hosts, and they
7354 were not all tried for each delivery (e.g. because of hosts_max_try), a
7355 message could remain on the queue longer than the retry timeout.
7357 80. Sieve bug: "stop" inside "elsif" was broken. Applied a patch from Michael
7360 81. Fixed an obscure SMTP outgoing bug which required at least the following
7361 conditions: (a) there was another message waiting for the same server;
7362 (b) the server returned 5xx to all RCPT commands in the first message so
7363 that the message was not completed; (c) the server dropped the connection
7364 or gave a negative response to the RSET that Exim sends to abort the
7365 transaction. The observed case was a dropped connection after DATA that had
7366 been sent in pipelining mode. That is, the server had advertised PIPELINING
7367 but was not implementing it correctly. The effect of the bug was incorrect
7368 behaviour, such as trying another host, and this could lead to a crash.
7374 1. The 3rd arguments to getsockname(), getpeername(), and accept() in exim.c
7375 and daemon.c were passed as pointers to ints; they should have been
7376 pointers to socklen_t variables (which are typically unsigned ints).
7378 2. Some signed/unsigned type warnings in the os.c file for Linux have been
7381 3. Fixed a really odd bug that affected only the testing scheme; patching a
7382 certain fixed string in the binary changed the value of another string that
7383 happened to be identical to the end of the original first string.
7385 4. When gethostbyname() (or equivalent) is passed an IP address as a "host
7386 name", it returns that address as the IP address. On some operating
7387 systems (e.g. Solaris), it also passes back the IP address string as the
7388 "host name". However, on others (e.g. Linux), it passes back an empty
7389 string. Exim wasn't checking for this, and was changing the host name to an
7390 empty string, assuming it had been canonicalized.
7392 5. Although rare, it is permitted to have more than one PTR record for a given
7393 IP address. I thought that gethostbyaddr() or getipnodebyaddr() always gave
7394 all the names associated with an address, because they do in Solaris.
7395 However, it seems that they do not in Linux for data that comes from the
7396 DNS. If an address in /etc/hosts has multiple names, they _are_ all given.
7397 I found this out when I moved to a new Linux workstation and tried to run
7398 the Exim test suite.
7400 To get round this problem I have changed the code so that it now does its
7401 own call to the DNS to look up PTR records when searching for a host name.
7402 If nothing can be found in the DNS, it tries gethostbyaddr(), so that
7403 addresses that are only in /etc/hosts are still found.
7405 This behaviour is, however, controlled by an option called host_lookup_
7406 order, which defaults to "bydns:byaddr". If people want to use the other
7407 order, or indeed, just use one or the other means of lookup, they can
7408 specify it in this variable.
7410 6. If a PTR record yields an empty name, Exim treats it as non-existent. In
7411 some operating systems, this comes back from gethostbyaddr() as an empty
7412 string, and this is what Exim used to test for. However, it seems that in
7413 other systems, "." is yielded. Exim now tests for this case too.
7415 7. The values of check_spool_space and check_log_space are now held internally
7416 as a number of kilobytes instead of an absolute number of bytes. If a
7417 numbers is specified without 'K' or 'M', it is rounded up to the nearest
7418 kilobyte. This means that much larger values can be stored.
7420 8. Exim monitor: an attempt to get the action menu when not actually pointing
7421 at a message produces an empty menu entitled "No message selected". This
7422 works on Solaris (OpenWindows). However, XFree86 does not like a menu with
7423 no entries in it ("Shell widget menu has zero width and/or height"). So I
7424 have added a single, blank menu entry in this case.
7426 9. Added ${quote_local_part.
7428 10. MIME decoding is now applied to the contents of Subject: header lines when
7431 11. Now that a reference to $sender_host_address automatically causes a reverse
7432 lookup to occur if necessary (4.13/18), there is no need to arrange for a
7433 host lookup before query-style lookups in lists that might use this
7434 variable. This has therefore been abolished, and the "net-" prefix is no
7435 longer necessary for query-style lookups.
7437 12. The Makefile for SCO_SV contained a setting of LDFLAGS. This appears to
7438 have been a typo for LFLAGS, so it has been changed.
7440 13. The install script calls Exim with "-C /dev/null" in order to find the
7441 version number. If ALT_CONFIG_PREFIX was set, this caused an error message
7442 to be output. However, since Exim outputs its version number before the
7443 error, it didn't break the script. It just looked ugly. I fixed this by
7444 always allowing "-C /dev/null" if the caller is root.
7446 14. Ignore overlarge ACL variable number when reading spool file - insurance
7447 against a later release with more variables having written the file.
7449 15. The standard form for an IPv6 address literal was being rejected by EHLO.
7450 Example: [IPv6:2002:c1ed:8229:10:202:2dff:fe07:a42a]. Exim now accepts
7451 this, as well as the form without the "IPv6" on the front.
7453 16. Added CHOWN_COMMAND=/usr/sbin/chown and LIBS=-lresolv to the
7454 OS/Makefile-Darwin file.
7456 17. Fixed typo in lookups/ldap.c: D_LOOKUP should be D_lookup. This applied
7457 only to LDAP libraries that do not have LDAP_OPT_DEREF.
7459 18. After change 4.21/52, "%ld" was used to format the contents of the $inode
7460 variable. However, some OS use ints for inodes. I've added cast to long int
7461 to get rid of the compiler warning.
7463 19. I had forgotten to lock out "/../" in configuration file names when
7464 ALT_CONFIG_PREFIX was set.
7466 20. Routers used for verification do not need to specify transports. However,
7467 if such a router generated a host list, and callout was configured, Exim
7468 crashed, because it could not find a port number from the (non-existent)
7469 transport. It now assumes port 25 in this circumstance.
7471 21. Added the -t option to exigrep.
7473 22. If LOOKUP_LSEARCH is defined, all three linear search methods (lsearch,
7474 wildlsearch, nwildlsearch) are compiled. LOOKUP_WILDLSEARCH and LOOKUP_
7475 NWILDLSEARCH are now obsolete, but retained for compatibility. If either of
7476 them is set, LOOKUP_LSEARCH is forced.
7478 23. "exim -bV" now outputs a list of lookups that are included in the binary.
7480 24. Added sender and host information to the "rejected by local_scan()" log
7481 line; previously there was no indication of these.
7483 25. Added .include_if_exists.
7485 26. Change 3.952/11 added an explicit directory sync on top of a file sync for
7486 Linux. It turns out that not all file systems support this. Apparently some
7487 versions of NFS do not. (It's rare to put Exim's spool on NFS, but people
7488 do it.) To cope with this, the error EINVAL, which means that sync-ing is
7489 not supported on the file descriptor, is now ignored when Exim is trying to
7490 sync a directory. This applies only to Linux.
7492 27. Added -DBIND_8_COMPAT to the CLFAGS setting for Darwin.
7494 28. In Darwin (MacOS X), the PAM headers are in /usr/include/pam and not in
7495 /usr/include/security. There's now a flag in OS/os.h-Darwin to cope with
7498 29. Added support for maildirsize files from supplied patch (modified a bit).
7500 30. The use of :fail: followed by an empty string could lead Exim to respond to
7501 sender verification failures with (e.g.):
7503 550 Verification failed for <xxx>
7504 550 Sender verify failed
7506 where the first response line was missing the '-' that indicates it is not
7507 the final line of the response.
7509 31. The loop for finding the name of the user that called Exim had a hardwired
7510 limit of 10; it now uses the value of finduser_retries, which is used for
7511 all other user lookups.
7513 32. Added $received_count variable, available in data and not_smtp ACLs, and at
7516 33. Exim was neglecting to zero errno before one call of strtol() when
7517 expanding a string and expecting an integer value. On some systems this
7518 resulted in spurious "integer overflow" errors. Also, it was casting the
7519 result into an int without checking.
7521 34. Testing for a connection timeout using "timeout_connect" in the retry rules
7522 did not work. The code looks as if it has *never* worked, though it appears
7523 to have been documented since at least release 1.62. I have made it work.
7525 35. The "timeout_DNS" error in retry rules, also documented since at least
7526 1.62, also never worked. As it isn't clear exactly what this means, and
7527 clearly it isn't a major issue, I have abolished the feature by treating it
7528 as "timeout", and writing a warning to the main and panic logs.
7530 36. The display of retry rules for -brt wasn't always showing the error code
7533 37. Added new error conditions to retry rules: timeout_A, timeout_MX,
7534 timeout_connect_A, timeout_connect_MX.
7536 38. Rewriting the envelope sender at SMTP time did not allow it to be rewritten
7537 to the empty sender.
7539 39. The daemon was not analysing the content of -oX till after it had closed
7540 stderr and disconnected from the controlling terminal. This meant that any
7541 syntax errors were only noted on the panic log, and the return code from
7542 the command was 0. By re-arranging the code a little, I've made the
7543 decoding happen first, so such errors now appear on stderr, and the return
7544 code is 1. However, the actual setting up of the sockets still happens in
7545 the disconnected process, so errors there are still only recorded on the
7548 40. A daemon listener on a wildcard IPv6 socket that also accepts IPv4
7549 connections (as happens on some IP stacks) was logged at start up time as
7550 just listening for IPv6. It now logs "IPv6 with IPv4". This differentiates
7551 it from "IPv6 and IPv4", which means that two separate sockets are being
7554 41. The debug output for gethostbyname2() or getipnodebyname() failures now
7555 says whether AF_INET or AF_INET6 was passed as an argument.
7557 42. Exiwhat output was messed up when time zones were included in log
7560 43. Exiwhat now gives more information about the daemon's listening ports,
7561 and whether -tls-on-connect was used.
7563 44. The "port" option of the smtp transport is now expanded.
7565 45. A "message" modifier in a "warn" statement in a non-message ACL was being
7566 silently ignored. Now an error message is written to the main and panic
7569 46. There's a new ACL modifier called "logwrite" which writes to a log file
7570 as soon as it is encountered.
7572 47. Added $local_user_uid and $local_user_gid at routing time.
7574 48. Exim crashed when trying to verify a sender address that was being
7577 49. Exim was recognizing only a space character after ".include". It now also
7578 recognizes a tab character.
7580 50. Fixed several bugs in the Perl script that creates the exim.8 man page by
7581 extracting the relevant information from the specification. The man page no
7582 longer contains scrambled data for the -d option, and I've added a section
7583 at the front about calling Exim under different names.
7585 51. Added "extra_headers" argument to the "mail" command in filter files.
7587 52. Redirecting mail to an unqualified address in a Sieve filter caused Exim to
7590 53. Installed eximstats 1.29.
7592 54. Added transport_filter_timeout as a generic transport option.
7594 55. Exim no longer adds an empty Bcc: header to messages that have no To: or
7595 Cc: header lines. This was required by RFC 822, but it not required by RFC
7598 56. Exim used to add From:, Date:, and Message-Id: header lines to any
7599 incoming messages that did not have them. Now it does so only if the
7600 message originates locally, that is, if there is no associated remote host
7601 address. When Resent- header lines are present, this applies to the Resent-
7602 lines rather than the non-Resent- lines.
7604 57. Drop incoming SMTP connection after too many syntax or protocol errors. The
7605 limit is controlled by smtp_max_synprot_errors, defaulting to 3.
7607 58. Messages for configuration errors now include the name of the main
7608 configuration file - useful now that there may be more than one file in a
7609 list (.included file names were always shown).
7611 59. Change 4.21/82 (run initgroups() when starting the daemon) causes problems
7612 for those rare installations that do not start the daemon as root or run it
7613 setuid root. I've cut out the call to initgroups() if the daemon is not
7616 60. The Exim user and group can now be bound into the binary as text strings
7617 that are looked up at the start of Exim's processing.
7619 61. Applied a small patch for the Interbase code, supplied by Ard Biesheuvel.
7621 62. Added $mailstore_basename variable.
7623 63. Installed patch to sieve.c from Michael Haardt.
7625 64. When Exim failed to open the panic log after failing to open the main log,
7626 the original message it was trying to log was written to stderr and debug
7627 output, but if they were not available (the usual case in production), it
7628 was lost. Now it is written to syslog before the two lines that record the
7629 failures to open the logs.
7631 65. Users' Exim filters run in subprocesses under the user's uid. It is
7632 possible for a "deliver" command or an alias in a "personal" command to
7633 provoke an address rewrite. If logging of address rewriting is configured,
7634 this fails because the process is not running as root or exim. There may be
7635 a better way of dealing with this, but for the moment (because 4.30 needs
7636 to be released), I have disabled address rewrite logging when running a
7637 filter in a non-root, non-exim process.
7643 1. The buildconfig auxiliary program wasn't quoting the value set for
7644 HEADERS_CHARSET. This caused a compilation error complaining that 'ISO' was
7645 not defined. This bug was masked in 4.22 by the effect that was fixed in
7648 2. Some messages that were rejected after a message id was allocated were
7649 shown as "incomplete" by exigrep. It no longer does this for messages that
7650 are rejected by local_scan() or the DATA or non-SMTP ACLs.
7652 3. If a Message-ID: header used a domain literal in the ID, and Exim did not
7653 have allow_domain_literals set, the ID did not get logged in the <= line.
7654 Domain literals are now always recognized in Message-ID: header lines.
7656 4. The first argument for a ${extract expansion item is the key name or field
7657 number. Leading and trailing spaces in this item were not being ignored,
7658 causing some misleading effects.
7660 5. When deliver_drop_privilege was set, single queue runner processes started
7661 manually (i.e. by the command "exim -q") or by the daemon (which uses the
7662 same command in the process it spins off) were not dropping privilege.
7664 6. When the daemon running as "exim" started a queue runner, it always
7665 re-executed Exim in the spun-off process. This is a waste of effort when
7666 deliver_drop_privilege is set. The new process now just calls the
7667 queue-runner function directly.
7673 1. Typo in the src/EDITME file: it referred to HEADERS_DECODE_TO instead of
7676 2. Change 4.21/73 introduced a bug. The pid file path set by -oP was being
7677 ignored. Though the use of -oP was forcing the writing of a pid file, it
7678 was always written to the default place.
7680 3. If the message "no IP address found for host xxxx" is generated during
7681 incoming verification, it is now followed by identification of the incoming
7682 connection (so you can more easily find what provoked it).
7684 4. Bug fix for Sieve filters: "stop" inside a block was not working properly.
7686 5. Added some features to "harden" Exim a bit more against certain attacks:
7688 (a) There is now a build-time option called FIXED_NEVER_USERS that can
7689 be put in Local/Makefile. This is like the never_users runtime option,
7690 but it cannot be overridden. The default setting is "root".
7692 (b) If ALT_CONFIG_PREFIX is defined in Local/Makefile, it specifies a
7693 prefix string with which any file named in a -C command line option
7696 (c) If ALT_CONFIG_ROOT_ONLY is defined in Local/Makefile, root privilege
7697 is retained for -C and -D only if the caller of Exim is root. Without
7698 it, the exim user may also use -C and -D and retain privilege.
7700 (d) If DISABLE_D_OPTION is defined in Local/Makefile, the use of the -D
7701 command line option is disabled.
7703 6. Macro names set by the -D option must start with an upper case letter, just
7704 like macro names defined in the configuration file.
7706 7. Added "dereference=" facility to LDAP.
7708 8. Two instances of the typo "uknown" in the source files are fixed.
7710 9. If a PERL_COMMAND setting in Local/Makefile was not at the start of a line,
7711 the Configure-Makefile script screwed up while processing it.
7713 10. Incorporated PCRE 4.4.
7715 11. The SMTP synchronization check was not operating right at the start of an
7716 SMTP session. For example, it could not catch a HELO sent before the client
7717 waited for the greeting. There is now a check for outstanding input at the
7718 point when the greeting is written. Because of the duplex, asynchronous
7719 nature of TCP/IP, it cannot be perfect - the incorrect input may be on its
7720 way, but not yet received, when the check is performed.
7722 12. Added tcp_nodelay to make it possible to turn of the setting of TCP_NODELAY
7723 on TCP/IP sockets, because this apparently causes some broken clients to
7726 13. Installed revised OS/Makefile-CYGWIN and OS/os.c-cygwin (the .h file was
7727 unchanged) from the Cygwin maintainer.
7729 14. The code for -bV that shows what is in the binary showed "mbx" when maildir
7730 was supported instead of testing for mbx. Effectively a typo.
7732 15. The spa authenticator server code was not checking that the input it
7733 received was valid base64.
7735 16. The debug output line for the "set" modifier in ACLs was not showing the
7736 name of the variable that was being set.
7738 17. Code tidy: the variable type "vtype_string" was never used. Removed it.
7740 18. Previously, a reference to $sender_host_name did not cause a DNS reverse
7741 lookup on its own. Something else was needed to trigger the lookup. For
7742 example, a match in host_lookup or the need for a host name in a host list.
7743 Now, if $sender_host_name is referenced and the host name has not yet been
7744 looked up, a lookup is performed. If the lookup fails, the variable remains
7745 empty, and $host_lookup_failed is set to "1".
7747 19. Added "eqi" as a case-independent comparison operator.
7749 20. The saslauthd authentication condition could segfault if neither service
7750 nor realm was specified.
7752 21. If an overflowing value such as "2048M" was set for message_size_limit, the
7753 error message that was logged was misleading, and incoming SMTP
7754 connections were dropped. The message is now more accurate, and temporary
7755 errors are given to SMTP connections.
7757 22. In some error situations (such as 21 above) Exim rejects all SMTP commands
7758 (except RSET) with a 421 error, until QUIT is received. However, it was
7759 failing to send a response to QUIT.
7761 23. The HELO ACL was being run before the code for helo_try_verify_hosts,
7762 which made it impossible to use "verify = helo" in the HELO ACL. The HELO
7763 ACL is now run after the helo_try_verify_hosts code.
7765 24. "{MD5}" and "{SHA1}" are now recognized as equivalent to "{md5"} and
7766 "{sha1}" in the "crypteq" expansion condition (in fact the comparison is
7767 case-independent, so other case variants are also recognized). Apparently
7768 some systems use these upper case variants.
7770 25. If more than two messages were waiting for the same host, and a transport
7771 filter was specified for the transport, Exim sent two messages over the
7772 same TCP/IP connection, and then failed with "socket operation on non-
7773 socket" when it tried to send the third.
7775 26. Added Exim::debug_write and Exim::log_write for embedded Perl use.
7777 27. The extern definition of crypt16() in expand.c was not being excluded when
7778 the OS had its own crypt16() function.
7780 28. Added bounce_return_body as a new option, and bounce_return_size_limit
7781 as a preferred synonym for return_size_limit, both as an option and as an
7784 29. Added LIBS=-liconv to OS/Makefile-OSF1.
7786 30. Changed the default configuration ACL to relax the local part checking rule
7787 for addresses that are not in any local domains. For these addresses,
7788 slashes and pipe symbols are allowed within local parts, but the sequence
7789 /../ is explicitly forbidden.
7791 31. SPA server authentication was not clearing the challenge buffer before
7794 32. log_message in a "warn" ACL statement was writing to the reject log as
7795 well as to the main log, which contradicts the documentation and doesn't
7796 seem right (because no rejection is happening). So I have stopped it.
7798 33. Added Ard Biesheuvel's lookup code for accessing an Interbase database.
7799 However, I am unable to do any testing of this.
7801 34. Fixed an infelicity in the appendfile transport. When checking directories
7802 for a mailbox, to see if any needed to be created, it was accidentally
7803 using path names with one or more superfluous leading slashes; tracing
7804 would show up entries such as stat("///home/ph10", 0xFFBEEA48).
7806 35. If log_message is set on a "discard" verb in a MAIL or RCPT ACL, its
7807 contents are added to the log line that is written for every discarded
7808 recipient. (Previously a log_message setting was ignored.)
7810 36. The ${quote: operator now quotes the string if it is empty.
7812 37. The install script runs exim in order to find its version number. If for
7813 some reason other than non-existence or emptiness, which it checks, it
7814 could not run './exim', it was installing it with an empty version number,
7815 i.e. as "exim-". This error state is now caught, and the installation is
7818 38. An argument was missing from the function that creates an error message
7819 when Exim fails to connect to the socket for saslauthd authentication.
7820 This could cause Exim to crash, or give a corrupted message.
7822 39. Added isip, isip4, and isip6 to ${if conditions.
7824 40. The ACL variables $acl_xx are now saved with the message, and can be
7825 accessed later in routers, transports, and filters.
7827 41. The new lookup type nwildlsearch is like wildlsearch, except that the key
7828 strings in the file are not string-expanded.
7830 42. If a MAIL command specified a SIZE value that was too large to fit into an
7831 int variable, the check against message_size_limit failed. Such values are
7832 now forced to INT_MAX, which is around 2Gb for a 32-bit variable. Maybe one
7833 day this will have to be increased, but I don't think I want to be around
7834 when emails are that large.
7841 1. Removed HAVE_ICONV=yes from OS/Makefile-FreeBSD, since it seems that
7842 iconv() is not standard in FreeBSD.
7844 2. Change 4.21/17 was buggy and could cause stack overwriting on a system with
7845 IPv6 enabled. The observed symptom was a segmentation fault on return from
7846 the function os_common_find_running_interfaces() in src/os.c.
7848 3. In the check_special_case() function in daemon.c I had used "errno" as an
7849 argument name, which causes warnings on some systems. This was basically a
7850 typo, since it was named "eno" in the comments!
7852 4. The code that waits for the clock to tick (at a resolution of some fraction
7853 of a second) so as to ensure message-id uniqueness was always waiting for
7854 at least one whole tick, when it could have waited for less. [This is
7855 almost certainly not relevant at current processor speeds, where it is
7856 unlikely to ever wait at all. But we try to future-proof.]
7858 5. The function that sleeps for a time interval that includes fractions of a
7859 second contained a race. It did not block SIGALRM between setting the
7860 timer, and suspending (a couple of lines later). If the interval was short
7861 and the sigsuspend() was delayed until after it had expired, the suspension
7862 never ended. On busy systems this could lead to processes getting stuck for
7865 6. Some uncommon configurations may cause a lookup to happen in a queue runner
7866 process, before it forks any delivery processes. The open lookup caching
7867 mechanism meant that the open file or database connection was passed into
7868 the delivery process. The problem was that delivery processes always tidy
7869 up cached lookup data. This could cause a problem for the next delivery
7870 process started by the queue runner, because the external queue runner
7871 process does not know about the closure. So the next delivery process
7872 still has data in the lookup cache. In the case of a file lookup, there was
7873 no problem because closing a file descriptor in a subprocess doesn't affect
7874 the parent. However, if the lookup was caching a connection to a database,
7875 the connection was closed, and the second delivery process was likely to
7876 see errors such as "PGSQL: query failed: server closed the connection
7877 unexpectedly". The problem has been fixed by closing all cached lookups
7878 in a queue runner before running a delivery process.
7880 7. Compiler warning on Linux for the second argument of iconv(), which doesn't
7881 seem to have the "const" qualifier which it has on other OS. I've
7884 8. Change 4.21/2 was too strict. It is only if there are two authenticators
7885 *of the same type* (client or server) with the same public name that an
7886 error should be diagnosed.
7888 9. When Exim looked up a host name for an IP address, but failed to find the
7889 original IP address when looking up the host name (a safety check), it
7890 output the message "<ip address> does not match any IP for NULL", which was
7891 confusing, to say the least. The bug was that the host name should have
7892 appeared instead of "NULL".
7894 10. Since release 3.03, if Exim is called by a uid other than root or the Exim
7895 user that is built into the binary, and the -C or -D options is used, root
7896 privilege is dropped before the configuration file is read. In addition,
7897 logging is switched to stderr instead of the normal log files. If the
7898 configuration then re-defines the Exim user, the unprivileged environment
7899 is probably not what is expected, so Exim logs a panic warning message (but
7902 However, if deliver_drop_privilege is set, the unprivileged state may well
7903 be exactly what is intended, so the warning has been cut out in that case,
7904 and Exim is allowed to try to write to its normal log files.
7910 1. smtp_return_error_details was not giving details for temporary sender
7911 or receiver verification errors.
7913 2. Diagnose a configuration error if two authenticators have the same public
7916 3. Exim used not to create the message log file for a message until the first
7917 delivery attempt. This could be confusing when incoming messages were held
7918 for policy or load reasons. The message log file is now created at the time
7919 the message is received, and an initial "Received" line is written to it.
7921 4. The automatically generated man page for command line options had a minor
7922 bug that caused no ill effects; however, a more serious problem was that
7923 the procedure for building the man page automatically didn't always
7924 operate. Consequently, release 4.20 contains an out-of-date version. This
7925 shouldn't happen again.
7927 5. When building Exim with embedded Perl support, the script that builds the
7928 Makefile was calling 'perl' to find its compile-time parameters, ignoring
7929 any setting of PERL_COMMAND in Local/Makefile. This is now fixed.
7931 6. The freeze_tell option was not being used for messages that were frozen on
7932 arrival, either by an ACL or by local_scan().
7934 7. Added the smtp_incomplete_transaction log selector.
7936 8. After STARTTLS, Exim was not forgetting that it had advertised AUTH, so it
7937 was accepting AUTH without a new EHLO.
7939 9. Added tls_remember_esmtp to cope with YAEB. This allows AUTH and other
7940 ESMTP extensions after STARTTLS without a new EHLO, in contravention of the
7943 10. Logging of TCP/IP connections (when configured) now happens in the main
7944 daemon process instead of the child process, so that the TCP/IP connection
7945 count is more accurate (but it can never be perfect).
7947 11. The use of "drop" in a nested ACL was not being handled correctly in the
7948 outer ACL. Now, if condition failure induced by the nested "drop" causes
7949 the outer ACL verb to deny access ("accept" or "discard" after "endpass",
7950 or "require"), the connection is dropped.
7952 12. Similarly, "discard" in a nested ACL wasn't being handled. A nested ACL
7953 that yield "discard" can now be used with an "accept" or a "discard" verb,
7954 but an error is generated for any others (because I can't see a useful way
7955 to define what should happen).
7957 13. When an ACL is read dynamically from a file (or anywhere else), the lines
7958 are now processed in the same way as lines in the Exim configuration file.
7959 In particular, continuation lines are supported.
7961 14. Added the "dnslists = a.b.c!=n.n.n.n" feature.
7963 15. Added -ti meaning -t -i.
7965 16. Check for letters, digits, hyphens, and dots in the names of dnslist
7966 domains, and warn by logging if others are found.
7968 17. At least on BSD, alignment is not guaranteed for the array of ifreq's
7969 returned from GIFCONF when Exim is trying to find the list of interfaces on
7970 a host. The code in os.c has been modified to copy each ifreq to an aligned
7971 structure in all cases.
7973 Also, in some cases, the returned ifreq's were being copied to a 'struct
7974 ifreq' on the stack, which was subsequently passed to host_ntoa(). That
7975 means the last couple of bytes of an IPv6 address could be chopped if the
7976 ifreq contained only a normal sockaddr (14 bytes storage).
7978 18. Named domain lists were not supported in the hosts_treat_as_local option.
7979 An entry such as +xxxx was not recognized, and was treated as a literal
7982 19. Ensure that header lines added by a DATA ACL are included in the reject log
7983 if the ACL subsequently rejects the message.
7985 20. Upgrade the cramtest.pl utility script to use Digest::MD5 instead of just
7986 MD5 (which is deprecated).
7988 21. When testing a filter file using -bf, Exim was writing a message when it
7989 took the sender from a "From " line in the message, but it was not doing so
7990 when it took $return_path from a Return-Path: header line. It now does.
7992 22. If the contents of a "message" modifier for a "warn" ACL verb do not begin
7993 with a valid header line field name (a series of printing characters
7994 terminated by a colon, Exim now inserts X-ACL-Warn: at the beginning.
7996 23. Changed "disc" in the source to "disk" to conform to the documentation and
7997 the book and for uniformity.
7999 24. Ignore Sendmail's -Ooption=value command line item.
8001 25. When execve() failed while trying to run a command in a pipe transport,
8002 Exim was returning EX_UNAVAILABLE (69) from the subprocess. However, this
8003 could be confused with a return value of 69 from the command itself. This
8004 has been changed to 127, the value the shell returns if it is asked to run
8005 a non-existent command. The wording for the related log line suggests a
8006 non-existent command as the problem.
8008 26. If received_header_text expands to an empty string, do not add a Received:
8009 header line to the message. (Well, it adds a token one on the spool, but
8010 marks it "old" so that it doesn't get used or transmitted.)
8012 27. Installed eximstats 1.28 (addition of -nt option).
8014 28. There was no check for failure on the call to getsockname() in the daemon
8015 code. This can fail if there is a shortage of resources on the system, with
8016 ENOMEM, for example. A temporary error is now given on failure.
8018 29. Contrary to the C standard, it seems that in some environments, the
8019 equivalent of setlocale(LC_ALL, "C") is not obeyed at the start of a C
8020 program. Exim now does this explicitly; it affects the formatting of
8021 timestamps using strftime().
8023 30. If exiqsumm was given junk data, it threw up some uninitialized variable
8024 complaints. I've now initialized all the variables, to avoid this.
8026 32. Header lines added by a system filter were not being "seen" during
8027 transport-time rewrites.
8029 33. The info_callback() function passed to OpenSSL is set up with type void
8030 (*)(SSL *, int, int), as described somewhere. However, when calling the
8031 function (actually a macro) that sets it up, the type void(*)() is
8032 expected. I've put in a cast to prevent warnings from picky compilers.
8034 34. If a DNS black list lookup found a CNAME record, but there were no A
8035 records associated with the domain it pointed at, Exim crashed.
8037 35. If a DNS black list lookup returned more than one A record, Exim ignored
8038 all but the first. It now scans all returned addresses if a particular IP
8039 value is being sought. In this situation, the contents of the
8040 $dnslist_value variable are a list of all the addresses, separated by a
8043 36. Tightened up the rules for host name lookups using reverse DNS. Exim used
8044 to accept a host name and all its aliases if the forward lookup for any of
8045 them yielded the IP address of the incoming connection. Now it accepts only
8046 those names whose forward lookup yields the correct IP address. Any other
8047 names are discarded. This closes a loophole whereby a rogue DNS
8048 administrator could create reverse DNS records to break through a
8049 wildcarded host restriction in an ACL.
8051 37. If a user filter or a system filter that ran in a subprocess used any of
8052 the numerical variables ($1, $2 etc), or $thisaddress, in a pipe command,
8053 the wrong values were passed to the pipe command ($thisaddress had the
8054 value of $0, $0 had the value of $1, etc). This bug was introduced by
8055 change 4.11/101, and not discovered because I wrote an inadequate test. :-(
8057 38. Improved the line breaking for long SMTP error messages from ACLs.
8058 Previously, if there was no break point between 40 and 75 characters, Exim
8059 left the rest of the message alone. Two changes have been made: (a) I've
8060 reduced the minimum length to 35 characters; (b) if it can't find a break
8061 point between 35 and 75 characters, it looks ahead and uses the first one
8062 that it finds. This may give the occasional overlong line, but at least the
8063 remaining text gets split now.
8065 39. Change 82 of 4.11 was unimaginative. It assumed the limit on the number of
8066 file descriptors might be low, and that setting 1000 would always raise it.
8067 It turns out that in some environments, the limit is already over 1000 and
8068 that lowering it causes trouble. So now Exim takes care not to decrease it.
8070 40. When delivering a message, the value of $return_path is set to $sender_
8071 address at the start of routing (routers may change the value). By an
8072 oversight, this default was not being set up when an address was tested by
8073 -bt or -bv, which affected the outcome if any router or filter referred to
8076 41. The idea of the "warn" ACL verb is that it adds a header or writes to the
8077 log only when "message" or "log_message" are set. However, if one of the
8078 conditions was an address verification, or a call to a nested ACL, the
8079 messages generated by the underlying test were being passed through. This
8080 no longer happens. The underlying message is available in $acl_verify_
8081 message for both "message" and "log_message" expansions, so it can be
8082 passed through if needed.
8084 42. Added RFC 2047 interpretation of header lines for $h_ expansions, with a
8085 new expansion $bh_ to give the encoded byte string without charset
8086 translation. Translation happens only if iconv() is available; HAVE_ICONV
8087 indicates this at build time. HEADERS_CHARSET gives the charset to
8088 translate to; headers_charset can change it in the configuration, and
8089 "headers charset" can change it in an individual filter file.
8091 43. Now that we have a default RFC 2047 charset (see above), the code in Exim
8092 that creates RFC 2047 encoded "words" labels them as that charset instead
8093 of always using iso-8859-1. The cases are (i) the explicit ${rfc2047:
8094 expansion operator; (ii) when Exim creates a From: line for a local
8095 message; (iii) when a header line is rewritten to include a "phrase" part.
8097 44. Nasty bug in exiqsumm: the regex to skip already-delivered addresses was
8098 buggy, causing it to skip the first lines of messages whose message ID
8099 ended in 'D'. This would not have bitten before Exim release 4.14, because
8100 message IDs were unlikely to end in 'D' before then. The effect was to have
8101 incorrect size information for certain domains.
8103 45. #include "config.h" was missing at the start of the crypt16.c module. This
8104 caused trouble on Tru64 (aka OSF1) systems, because HAVE_CRYPT16 was not
8107 46. If there was a timeout during a "random" callout check, Exim treated it as
8108 a failure of the random address, and carried on sending RSET and the real
8109 address. If the delay was just some slowness somewhere, the response to the
8110 original RCPT would be taken as a response to RSET and so on, causing
8111 mayhem of various kinds.
8113 47. Change 50 for 4.20 was a heap of junk. I don't know what I was thinking
8114 when I implemented it. It didn't allow for the fact that some option values
8115 may legitimately be negative (e.g. size_addition), and it didn't even do
8116 the right test for positive values.
8118 48. Domain names in DNS records are case-independent. Exim always looks them up
8119 in lower case. Some resolvers return domain names in exactly the case they
8120 appear in the zone file, that is, they may contain uppercase letters. Not
8121 all resolvers do this - some return always lower case. Exim was treating a
8122 change of case by a resolver as a change of domain, similar to a widening
8123 of a domain abbreviation. This triggered its re-routing code and so it was
8124 trying to route what was effectively the same domain again. This normally
8125 caused routing to fail (because the router wouldn't handle the domain
8126 twice). Now Exim checks for this case specially, and just changes the
8127 casing of the domain that it ultimately uses when it transmits the message
8130 49. Added Sieve (RFC 3028) support, courtesy of Michael Haardt's contributed
8133 50. If a filter generated a file delivery with a non-absolute name (possible if
8134 no home directory exists for the router), the forbid_file option was not
8137 51. Added '&' feature to dnslists, to provide bit mask matching in addition to
8138 the existing equality matching.
8140 52. Exim was using ints instead of ino_t variables in some places where it was
8141 dealing with inode numbers.
8143 53. If TMPDIR is defined in Local/Makefile (default in src/EDITME is
8144 TMPDIR="/tmp"), Exim checks for the presence of an environment variable
8145 called TMPDIR, and if it finds it is different, it changes its value.
8147 54. The smtp_printf() function is now made available to local_scan() so
8148 additional output lines can be written before returning. There is also an
8149 smtp_fflush() function to enable the detection of a dropped connection.
8150 The variables smtp_input and smtp_batched_input are exported to
8153 55. Changed the default runtime configuration: the message "Unknown user"
8154 has been removed from the ACL, and instead placed on the localuser router,
8155 using the cannot_route_message feature. This means that any verification
8156 failures that generate their own messages won't get overridden. Similarly,
8157 the "Unrouteable address" message that was in the ACL for unverifiable
8158 relay addresses has also been removed.
8160 56. Added hosts_avoid_esmtp to the smtp transport.
8162 57. The exicyclog script was not checking for the esoteric option
8163 CONFIGURE_FILE_USE_EUID in the Local/Makefile. It now does this, but it
8164 will work only if exicyclog is run under the appropriate euid.
8166 58. Following a discussion on the list, the rules by which Exim recognises line
8167 endings on incoming messages have been changed. The -dropcr and drop_cr
8168 options are now no-ops, retained only for backwards compatibility. The
8169 following line terminators are recognized: LF CRLF CR. However, special
8170 processing applies to CR:
8172 (i) The sequence CR . CR does *not* terminate an incoming SMTP message,
8173 nor a local message in the state where . is a terminator.
8175 (ii) If a bare CR is encountered in a header line, an extra space is added
8176 after the line terminator so as not to end the header. The reasoning
8177 behind this is that bare CRs in header lines are most likely either
8178 to be mistakes, or people trying to play silly games.
8180 59. The size of a message, as listed by "-bp" or in the Exim monitor window,
8181 was being incorrectly given as 18 bytes larger than it should have been.
8182 This is a VOB (very old bug).
8184 60. This may never have affected anything current, but just in case it has:
8185 When the local host is found other than at the start of a list of hosts,
8186 the local host, those with the same MX, and any that follow, are discarded.
8187 When the list in question was part of a longer list of hosts, the following
8188 hosts (not currently being processed) were also being discarded. This no
8189 longer happens. I'm not sure if this situation could ever has previously
8192 61. Added the "/MX" feature to lists of hosts in the manualroute and query
8195 62. Whenever Exim generates a new message, it now adds an Auto-Submitted:
8196 header. This is something that is recommended in a new Internet Draft, and
8197 is something that is documented as being done by Sendmail. There are two
8198 possible values. For messages generated by the autoreply transport, Exim
8201 Auto-Submitted: auto-replied
8203 whereas for all other generated messages (e.g. bounces) it adds
8205 Auto-Submitted: auto-generated
8207 63. The "personal" condition in filters now includes a test for the
8208 Auto-Submitted: header. If it contains the string "auto-" the message it
8209 not considered personal.
8211 64. Added rcpt_include_affixes as a generic transport option.
8213 65. Added queue_only_override (default true).
8215 66. Added the syslog_duplication option.
8217 67. If what should have been the first header line of a message consisted of
8218 a space followed by a colon, Exim was mis-interpreting it as a header line.
8219 It isn't of course - it is syntactically invalid and should therefore be
8220 treated as the start of the message body. The misbehaviour could have
8221 caused a number of strange effects, including loss of data in subsequent
8222 header lines, and spool format errors.
8224 68. Formerly, the AUTH parameter on a MAIL command was trusted only if the
8225 client host had authenticated. This control can now be exercised by an ACL
8226 for more flexibility.
8228 69. By default, callouts do not happen when testing with -bh. There is now a
8229 variant, -bhc, which does actually run the callout code, including
8230 consulting and updating the callout cache.
8232 70. Added support for saslauthd authentication, courtesy of Alexander
8235 71. If statvfs() failed on the spool or log directories while checking their
8236 size for availability, Exim confusingly gave the error "space shortage".
8237 Furthermore, in debugging mode it crashed with a floating point exception.
8238 These checks are done if check_{spool,log}_{space,inodes} are set, and when
8239 an SMTP message arrives with SIZE= on the MAIL command. As this is a really
8240 serious problem, Exim now writes to the main and panic logs when this
8241 happens, with details of the failure. It then refuses to accept the
8242 incoming message, giving the message "spool directory problem" or "log
8243 directory problem" with a 421 code for SMTP messages.
8245 72. When Exim is about to re-exec itself, it ensures that the file descriptors
8246 0, 1, and 2 exist, because some OS complain for execs without them (see
8247 ChangeLog 4.05/30). If necessary, Exim opens /dev/null to use for these
8248 descriptors. However, the code omitted to check that the open succeeded,
8249 causing mysterious errors if for some reason the permissions on /dev/null
8250 got screwed. Now Exim writes a message to the main and panic logs, and
8251 bombs out if it can't open /dev/null.
8253 73. Re-vamped the way daemon_smtp_port, local_interfaces, and -oX work and
8254 interact so that it is all more flexible. It is supposed to remain
8255 backwards compatible. Also added extra_local_interfaces.
8257 74. Invalid data sent to a SPA (NTLM) server authenticator could cause the code
8258 to bomb out with an assertion failure - to the client this appears as a
8259 connection drop. This problem occurs in the part of the code that was taken
8260 from the Samba project. Fortunately, the assertion is in a very simple
8261 function, so I have fixed this by reproducing the function inline in the
8262 one place where it is called, and arranging for authentication to fail
8263 instead of killing the process with assert().
8265 75. The SPA client code was not working when the server requested OEM rather
8266 than Unicode encoding.
8268 76. Added code to make require_files with a specific uid setting more usable in
8269 the case where statting the file as root fails - usually a non-root-mounted
8270 NFS file system. When this happens and the failure is EACCES, Exim now
8271 forks a subprocess and does the per-uid checking as the relevant uid.
8273 77. Added process_log_path.
8275 78. If log_file_path was not explicitly set, a setting of check_log_space or
8276 check_log_inodes was ignored.
8278 79. If a space check for the spool or log partitions fails, the incident is now
8279 logged. Of course, in the latter case the data may get lost...
8281 80. Added the %p formatting code to string_format() so that it can be used to
8282 print addresses in debug_print(). Adjusted all the address printing in the
8283 debugging in store.c to use %p rather than %d.
8285 81. There was a concern that a line of code in smtp_in.c could overflow a
8286 buffer if a HELO/EHLO command was given followed by 500 or so spaces. As
8287 initially expressed, the concern was not well-founded, because trailing
8288 spaces are removed early. However, if the trailing spaces were followed by
8289 a NULL, they did not get removed, so the overflow was possible. Two fixes
8292 (a) I re-wrote the offending code in a cleaner fashion.
8293 (b) If an incoming SMTP command contains a NULL character, it is rejected
8296 82. When Exim changes uid/gid to the Exim user at daemon start time, it now
8297 runs initgroups(), so that if the Exim user is in any additional groups,
8298 they will be used during message reception.
8304 The change log for 4.20 and earlier releases has been archived.
git://git.exim.org / exim.git / blob