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 Support list of dkim results in the dkim_status ACL condition, making
9 it more usable in the data ACL.
11 JH/02 Bug 3040: Handle error on close of the spool data file during reception.
12 Previously This was only logged, on the assumption that errors would be
13 seen for a previous fflush(). However, a fuse filesystem has been
14 reported as showing this an error for the fclose(). The spool is now in
15 an uncertain state, and we have logged and responded acceptance. Change
16 this to respond with a temp-reject, wipe spoolfiles, and log the error
19 JH/03 Bug 3030: Fix handling of DNS servfail respons for DANE TLSA. When hit
20 during a recipient verify callout, a QUIT command was attempted on the
21 now-closed callout channel, causing a paniclog entry.
23 JH/04 Bug 3039: Fix handling of of an empty log_reject_target, with
24 a connection_reject log_selector, under tls_on_connect. Previously
25 with this combination, when the connect ACL rejected, a spurious
26 paniclog entry was made.
28 JH/05 Fix TLS resumption for TLS-on-connect. This was broken by the advent
29 of loadbalancer-detection for resumption, in 4.96 - which tries to
30 use the EHLO response. SMTPS does not have one at the time it is starting
31 TLS. Change the default for the smtp transport host_name_extract option
32 to be a static string, for TLS-on-connect cases; meaning that resumption
33 will always be attempted (unless deliberately overriden).
35 JH/06 Bug 3054: Fix dnsdb lookup for a TXT record with multiple chunks, with a
36 chunk-separator specification. This was broken by hardening introduced
44 JH/01 The hosts_connection_nolog main option now also controls "no MAIL in
45 SMTP connection" log lines.
47 JH/02 Option default value updates:
48 - queue_fast_ramp (main) true (was false)
49 - remote_max_parallel (main) 4 (was 2)
51 JH/03 Cache static regex pattern compilations, for use by ACLs.
53 JH/04 Bug 2903: avoid exit on an attempt to rewrite a malformed address.
54 Make the rewrite never match and keep the logging. Trust the
55 admin to be using verify=header-syntax (to actually reject the message).
57 JH/05 Follow symlinks for placing a watch on TLS creds files. This means
58 (under Linux) we watch the dir containing the final file; previously
59 it would be the dir with the first symlink. We still do not monitor
62 JH/06 Check for bad chars in rDNS for sender_host_name. The OpenBSD (at least)
63 dn_expand() is happy to pass them through.
65 JH/07 OpenSSL Fix auto-reload of changed server OCSP proof. Previously, if
66 the file with the proof had an unchanged name, the new proof(s) were
67 loaded on top of the old ones (and nover used; the old ones were stapled).
69 JH/08 Bug 2915: Fix use-after-free for $regex<n> variables. Previously when
70 more than one message arrived in a single connection a reference from
71 the earlier message could be re-used. Often a sigsegv resulted.
72 These variables were introduced in Exim 4.87.
73 Debug help from Graeme Fowler.
75 JH/09 Fix ${filter } for conditions that modify $value. Previously the
76 modified version would be used in construction the result, and a memory
79 JH/10 GnuTLS: fix for (IOT?) clients offering no TLS extensions at all.
80 Find and fix by Jasen Betts.
82 JH/11 OpenSSL: fix for ancient clients needing TLS support for versions earlier
83 than TLSv1,2, Previously, more-recent versions of OpenSSL were permitting
84 the systemwide configuration to override the Exim config.
86 HS/01 Bug 2728: Introduce EDITME option "DMARC_API" to work around incompatible
87 API changes in libopendmarc.
89 JH/12 Bug 2930: Fix daemon startup. When started from any process apart from
90 pid 1, in the normal "background daemon" mode, having to drop process-
91 group leadership also lost track of needing to create listener sockets.
93 JH/13 Bug 2929: Fix using $recipients after ${run...}. A change made for 4.96
94 resulted in the variable appearing empty. Find and fix by Ruben Jenster.
96 JH/14 Bug 2933: Fix regex substring match variables for null matches. Since 4.96
97 a capture group which obtained no text (eg. "(abc)*" matching zero
98 occurrences) could cause a segfault if the corresponding $<n> was
101 JH/15 Fix argument parsing for ${run } expansion. Previously, when an argument
102 included a close-brace character (eg. it itself used an expansion) an
105 JH/16 Move running the smtp connect ACL to before, for TLS-on-connect ports,
106 starting TLS. Previously it was after, meaning that attackers on such
107 ports had to be screened using the host_reject_connection main config
108 option. The new sequence aligns better with the STARTTLS behaviour, and
109 permits defences against crypto-processing load attacks, even though it
110 is strictly an incompatible change.
111 Also, avoid sending any SMTP fail response for either the connect ACL
112 or host_reject_connection, for TLS-on-connect ports.
114 JH/17 Permit the ACL "encrypted" condition to be used in a HELO/EHLO ACL,
115 Previously this was not permitted, but it makes reasonable sense.
116 While there, restore a restriction on using it from a connect ACL; given
117 the change JH/16 it could only return false (and before 4.91 was not
120 JH/18 Fix a fencepost error in logging. Previously (since 4.92) when a log line
121 was exactly sized compared to the log buffer, a crash occurred with the
122 misleading message "bad memory reference; pool not found".
123 Found and traced by Jasen Betts.
125 JH/19 Bug 2911: Fix a recursion in DNS lookups. Previously, if the main option
126 dns_again_means_nonexist included an element causing a DNS lookup which
127 itself returned DNS_AGAIN, unbounded recursion occurred. Possible results
128 included (though probably not limited to) a process crash from stack
129 memory limit, or from excessive open files. Replace this with a paniclog
130 whine (as this is likely a configuration error), and returning
133 JH/20 Bug 2954: (OpenSSL) Fix setting of explicit EC curve/group. Previously
134 this always failed, probably leading to the usual downgrade to in-clear
137 JH/21 Fix TLSA lookups. Previously dns_again_means_nonexist would affect
138 SERVFAIL results, which breaks the downgrade resistance of DANE. Change
139 to not checking that list for these lookups.
141 JH/22 Bug 2434: Add connection-elapsed "D=" element to more connection
144 JH/23 Fix crash in string expansions. Previously, if an empty variable was
145 immediately followed by an expansion operator, a null-indirection read
146 was done, killing the process.
148 JH/24 Bug 2997: When built with EXPERIMENTAL_DSN_INFO, bounce messages can
149 include an SMTP response string which is longer than that supported
150 by the delivering transport. Alleviate by wrapping such lines before
153 JH/25 Bug 2827: Restrict size of References: header in bounce messages to 998
154 chars (RFC limit). Previously a limit of 12 items was made, which with
155 a not-impossible References: in the message being bounced could still
156 be over-large and get stopped in the transport.
158 JH/26 For a ${readsocket } in TLS mode, send a TLS Close Alert before the TCP
159 close. Previously a bare socket close was done.
161 JH/27 Fix ${srs_encode ..}. Previously it would give a bad result for one day
164 JH/28 Bug 2996: Fix a crash in the smtp transport. When finding that the
165 message being considered for delivery was already being handled by
166 another process, and having an SMTP connection already open, the function
167 to close it tried to use an uninitialized variable. This would afftect
168 high-volume sites more, especially when running mailing-list-style loads.
169 Pollution of logs was the major effect, as the other process delivered
170 the message. Found and partly investigated by Graeme Fowler.
172 JH/29 Change format of the internal ID used for message identification. The old
173 version only supported 31 bits for a PID element; the new 64 (on systems
174 which can use Base-62 encoding, which is all currently supported ones
175 but not Darwin (MacOS) or Cygwin, which have case-insensitive filesystems
176 and must use Base-36). The new ID is 23 characters rather than 16, and is
177 visible in various places - notably logs, message headers, and spool file
178 names. Various of the ancillary utilities also have to know the format.
179 As well as the expanded PID portion, the sub-second part of the time
180 recorded in the ID is expanded to support finer precision. Theoretically
181 this permits a receive rate from a single comms channel of better than the
183 The major timestamp part of the ID is not changed; at 6 characters it is
184 usable until about year 3700.
185 Updating from previously releases is fully supported: old-format spool
186 files are still usable, and the utilities support both formats. New
187 message will use the new format. The one hints-DB file type which uses
188 message-IDs (the transport wait- DB) will be discarded if an old-format ID
189 is seen; new ones will be built with only new-format IDs.
190 Optionally, a utility can be used to convert spool files from old to new,
191 but this is only an efficiency measure not a requirement for operation
192 Downgrading from new to old requires running a provided utility, having
193 first stopped all operations. This will convert any spool files from new
194 back to old (losing time-precision and PID information) and remove any
195 wait- hints databases.
197 JH/30 Bug 3006: Fix handling of JSON strings having embedded commas. Previously
198 we treated them as item separators when parsing for a list item, but they
199 need to be protected by the doublequotes. While there, add handling for
202 JH/31 Bug 2998: Fix ${utf8clean:...} to disallow UTF-16 surrogate codepoints.
203 Found and fixed by Jasen Betts. No testcase for this as my usual text
204 editor insists on emitting only valid UTF-8.
206 JH/32 Fix "tls_dhparam = none" under GnuTLS. At least with 3.7.9 this gave
207 a null-indirection SIGSEGV for the receive process.
209 JH/33 Fix free for live variable $value created by a ${run ...} expansion during
210 -bh use. Internal checking would spot this and take a panic.
212 JH/34 Bug 3013: Fix use of $recipients within arguments for ${run...}.
213 In 4.96 this would expand to empty.
215 JH/35 Bug 3014: GnuTLS: fix expiry date for an auto-generated server
216 certificate. Find and fix by Andreas Metzler.
218 JH/36 Add ARC info to DMARC hostory records.
220 JH/37 Bug 3016: Avoid sending DSN when message was accepted under fakereject
221 or fakedefer. Previously the sender could discover that the message
222 had in fact been accepted.
224 JH/38 Taint-track intermediate values from the peer in multi-stage authentation
225 sequences. Previously the input was not noted as being tainted; notably
226 this resulted in behaviour of LOGIN vs. PLAIN being inconsistent under
227 bad coding of authenticators.
229 JH/39 Bug 3023: Fix crash induced by some combinations of zero-length strings
230 and ${tr...}. Found and diagnosed by Heiko Schlichting.
232 JH/40 Bug 2999: Fix a possible OOB write in the external authenticator, which
233 could be triggered by externally-supplied input. Found by Trend Micro.
236 JH/41 Bug 3000: Fix a possible OOB write in the SPA authenticator, which could
237 be triggered by externally-controlled input. Found by Trend Micro.
240 JH/42 Bug 3001: Fix a possible OOB read in the SPA authenticator, which could
241 be triggered by externally-controlled input. Found by Trend Micro.
244 JH/43 Bug 2903: avoid exit on an attempt to rewrite a malformed address.
245 Make the rewrite never match and keep the logging. Trust the
246 admin to be using verify=header-syntax (to actually reject the message).
248 JH/44 Bug 3033: Harden dnsdb lookups against crafted DNS responses.
251 HS/02 Fix string_is_ip_address() CVE-2023-42117 (Bug 3031)
257 JH/01 Move the wait-for-next-tick (needed for unique message IDs) from
258 after reception to before a subsequent reception. This should
259 mean slightly faster delivery, and also confirmation of reception
262 JH/02 Move from using the pcre library to pcre2. The former is no longer
263 being developed or supported (by the original developer).
265 JH/03 Constification work in the filters module required a major version
266 bump for the local-scan API. Specifically, the "headers_charset"
267 global which is visible via the API is now const and may therefore
268 not be modified by local-scan code.
270 JH/04 Fix ClamAV TCP use under FreeBSD. Previously the OS-specific shim for
271 sendfile() didi not account for the way the ClamAV driver code called it.
273 JH/05 Bug 2819: speed up command-line messages being read in. Previously a
274 time check was being done for every character; replace that with one
277 JH/06 Bug 2815: Fix ALPN sent by server under OpenSSL. Previously the string
278 sent was prefixed with a length byte.
280 JH/07 Change the SMTP feature name for pipelining connect to be compliant with
281 RFC 5321. Previously Dovecot (at least) would log errors during
284 JH/08 Remove stripping of the binaries from the FreeBSD build. This was added
285 in 4.61 without a reason logged. Binaries will be bigger, which might
286 matter on diskspace-constrained systems, but debug is easier.
288 JH/09 Fix macro-definition during "-be" expansion testing. The move to
289 write-protected store for macros had not accounted for these runtime
290 additions; fix by removing this protection for "-be" mode.
292 JH/10 Convert all uses of select() to poll(). FreeBSD 12.2 was found to be
293 handing out large-numbered file descriptors, violating the usual Unix
294 assumption (and required by Posix) that the lowest possible number will be
295 allocated by the kernel when a new one is needed. In the daemon, and any
296 child procesees, values higher than 1024 (being bigger than FD_SETSIZE)
297 are not useable for FD_SET() [and hence select()] and overwrite the stack.
298 Assorted crashes happen.
300 JH/11 Fix use of $sender_host_name in daemon process. When used in certain
301 main-section options or in a connect ACL, the value from the first ever
302 connection was never replaced for subsequent connections. Found by
305 JH/12 Bug 2838: Fix for i32lp64 hard-align platforms. Found for SPARC Linux,
306 though only once PCRE2 was introduced: the memory accounting used under
307 debug offset allocations by an int, giving a hard trap in early startup.
308 Change to using a size_t. Debug and fix by John Paul Adrian Glaubitz.
310 JH/13 Bug 2845: Fix handling of tls_require_ciphers for OpenSSL when a value
311 with underbars is given. The write-protection of configuration introduced
312 in 4.95 trapped when normalisation was applied to an option not needing
315 JH/14 Bug 1895: TLS: Deprecate RFC 5114 Diffie-Hellman parameters.
317 JH/15 Fix a resource leak in *BSD. An off-by-one error resulted in the daemon
318 failing to close the certificates directory, every hour or any time it
321 JH/16 Debugging initiated by an ACL control now continues through into routing
322 and transport processes. Previously debugging stopped any time Exim
323 re-execs, or for processing a queued message.
325 JH/17 The "expand" debug selector now gives more detail, specifically on the
326 result of expansion operators and items.
328 JH/18 Bug 2751: Fix include_directory in redirect routers. Previously a
329 bad comparison between the option value and the name of the file to
330 be included was done, and a mismatch was wrongly identified.
331 4.88 to 4.95 are affected.
333 JH/19 Support for Berkeley DB versions 1 and 2 is withdrawn.
335 JH/20 When built with NDBM for hints DB's check for nonexistence of a name
336 supplied as the db file-pair basename. Previously, if a directory
337 path was given, for example via the autoreply "once" option, the DB
338 file.pag and file.dir files would be created in that directory's
341 JH/21 Remove the "allow_insecure_tainted_data" main config option and the
342 "taint" log_selector. These were previously deprecated.
344 JH/22 Fix static address-list lookups to properly return the matched item.
345 Previously only the domain part was returned.
347 JH/23 Bug 2864: FreeBSD: fix transport hang after 4xx/5xx response. Previously
348 the call into OpenSSL to send a TLS Close was being repeated; this
349 resulted in the library waiting for the peer's Close. If that was never
350 sent we waited forever. Fix by tracking send calls.
352 JH/24 The ${run} expansion item now expands its command string elements after
353 splitting. Previously it was before; the new ordering makes handling
354 zero-length arguments simpler. The old ordering can be obtained by
355 appending a new option "preexpand", after a comma, to the "run".
357 JH/25 Taint-check exec arguments for transport-initiated external processes.
358 Previously, tainted values could be used. This affects "pipe", "lmtp" and
359 "queryprogram" transport, transport-filter, and ETRN commands.
360 The ${run} expansion is also affected: in "preexpand" mode no part of
361 the command line may be tainted, in default mode the executable name
364 JH/26 Fix CHUNKING on a continued-transport. Previously the usabliility of
365 the the facility was not passed across execs, and only the first message
366 passed over a connection could use BDAT; any further ones using DATA.
368 JH/27 Support the PIPECONNECT facility in the smtp transport when the helo_data
369 uses $sending_ip_address and an interface is specified.
370 Previously any use of the local address in the EHLO name disabled
371 PIPECONNECT, the common case being to use the rDNS of it.
373 JH/28 OpenSSL: fix transport-required OCSP stapling verification under session
374 resumption. Previously verify failed because no certificate status is
375 passed on the wire for the restarted session. Fix by using the recorded
376 ocsp status of the stored session for the new connection.
378 JH/29 TLS resumption: the key for session lookup in the client now includes
379 more info that a server could potentially use in configuring a TLS
380 session, avoiding oferring mismatching sessions to such a server.
381 Previously only the server IP was used.
383 JH/30 Fix string_copyn() for limit greater than actual string length.
384 Previously the copied amount was the limit, which could result in a
385 overlapping memcpy for newly allocated destination soon after a
386 source string shorter than the limit. Found/investigated by KM.
388 JH/31 Bug 2886: GnuTLS: Do not free the cached creds on transport connection
389 close; it may be needed for a subsequent connection. This caused a
390 SEGV on primary-MX defer. Found/investigated by Gedalya & Andreas.
392 JH/32 Fix CHUNKING for a second message on a connection when the first was
393 rejected. Previously we did not reset the chunking-offered state, and
394 erroneously rejected the BDAT command. Investigation help from
397 JH/33 Fis ${srs_encode ...} to handle an empty sender address, now returning
398 an empty address. Previously the expansion returned an error.
400 HS/01 Bug 2855: Handle a v4mapped sender address given us by a frontending
401 proxy. Previously these were misparsed, leading to paniclog entries.
407 JH/01 Bug 1329: Fix format of Maildir-format filenames to match other mail-
408 related applications. Previously an "H" was used where available info
409 says that "M" should be, so change to match.
411 JH/02 Bug 2587: Fix pam expansion condition. Tainted values are commonly used
412 as arguments, so an implementation trying to copy these into a local
413 buffer was taking a taint-enforcement trap. Fix by using dynamically
414 created buffers. Similar fix for radius expansion condition.
416 JH/03 Bug 2586: Fix listcount expansion operator. Using tainted arguments is
417 reasonable, eg. to count headers. Fix by using dynamically created
418 buffers rather than a local. Do similar fixes for ACL actions "dcc",
419 "log_reject_target", "malware" and "spam"; the arguments are expanded
420 so could be handling tainted values.
422 JH/04 Bug 2590: Fix -bi (newaliases). A previous code rearrangement had
423 broken the (no-op) support for this sendmail command. Restore it
424 to doing nothing, silently, and returning good status.
426 JH/05 Bug 2593: Fix "vacation" in Exim filter. Previously, when a "once"
427 record path was given (or the default used) without a leading directory
428 path, an error occurred on trying to open it. Use the transport's working
431 JH/06 Bug 2594: Change the name used for certificate name checks in the smtp
432 transport. Previously it was the name on the DNS A-record; use instead
433 the head of the CNAME chain leading there (if there is one). This seems
434 to align better with RFC 6125.
436 JH/07 Bug 2597: Fix a resource leak. Using a lookup in obtaining a value for
437 smtp_accept_max_per_host allocated resources which were not released
438 when the limit was exceeded. This eventually crashed the daemon. Fix
439 by adding a release action in that path.
441 JH/08 Bug 2598: Fix verify ACL condition. The options for the condition are
442 expanded; previously using tainted values was rejected. Fix by using
443 dynamically-created buffers.
445 JH/09 Relax restrictions on ACL verify condition needing access to message
446 headers. Previously they were only permitted in data and non-smtp ACLs;
447 permit also mime, dkim, prdr quit and notquit. Applies to header-syntax,
448 not_blind, header_sender and header_names_ascii verification.
450 JH/10 Bug 2603: Fix coding of string copying to only evaluate arguments once.
451 Previously a macro used one argument twice; when called with the
452 argument as an expression having side-effects, incorrect operation
453 resulted. Use an inlineable function.
455 JH/11 Bug 2604: Fix request to cutthrough-deliver when a connection is already
456 held open for a verify callout. Previously this wan not accounted for
457 and a corrupt onward SMTP conversation resulted.
459 JH/12 Bug 2607: Fix the ${srs_encode } expansion to handle quoted local_parts.
460 Previously they were embedded naively in the constructed address; when
461 needed, strip the quoting and quote the entire local_part.
462 Also make the inbound_srs expansion condition handle quoting.
464 JH/13 Fix dsearch "subdir" filter to ignore ".". Previously only ".." was
465 excluded, not matching the documentation.
467 JH/14 Bug 2606: Fix a segfault in sqlite lookups. When no, or a bad, filename
468 was given for the sqlite_dbfile a trap resulted.
470 JH/15 Bug 2620: Fix "spam" ACL condition. Previously, tainted values for the
471 "name" argument resulted in a trap. There is no reason to disallow such;
472 this was a coding error.
474 JH/16 Bug 2615: Fix pause during message reception, on systems that have been
475 suspended/resumed. The Linux CLOCK_MONOTONIC does not account for time
476 spent suspended, ignoring the POSIX definition. Previously we assumed
477 it did and a constant offset from real time could be used as a correction.
478 Change to using the same clock source for the start-of-message and the
479 post-message next-tick-wait. Also change to using CLOCK_BOOTTIME if it
480 exists, just to get a clock slightly more aligned to reality.
482 JH/17 Bug 2295: Fix DKIM signing to always semicolon-terminate. Although the
483 RFC says it is optional some validators care. The missing char was not
484 intended but triggered by a line-wrap alignment. Discovery and fix by
485 Guillaume Outters, hacked on by JH.
487 JH/18 Bug 2617: Fix a taint trap in parse_fix_phrase(). Previously when the
488 name being quoted was tainted a trap would be taken. Fix by using
489 dynamically created buffers. The routine could have been called by a
490 rewrite with the "h" flag, by using the "-F" command-line option, or
491 by using a "name=" option on a control=submission ACL modifier.
493 JH/19 SPF: change the Authentication-Results expansion component to give
494 smtp.helo when the sender domain is empty. Previously it gave
497 JH/20 Bug 2631: ACL dnslist conditions now ignore and log any lookups returns
498 not in 127.0.0.0/8 to help in spotting list domains taken over by a
499 domain-parking registrar.
501 JH/21 Bug 2630: Fix eol-replacement string for the ${readsocket } expansion.
502 Previously when a whitespace character was specified it was not inserted
503 after removing the newline.
505 JH/22 Bug 2265: Force SNI usage for smtp transport DANE'd connections, to be
506 the domain part of the recipient address. This overrides any tls_sni
507 option set, which was previously used.
509 JH/23 Logging: with the +tls_sni log_selector, do not wrap the received SNI
512 JH/24 Bug 2634: Fix a taint trap seen on NetBSD: the testing coded for
513 is_tainted() had an off-by-one error in the overenthusiastic direction.
514 Find and fix by Gavan. Although NetBSD is not a supported platform for
515 4.94 this bug could affect other platforms.
517 PP/01 Fix default prime selection to be consistent.
518 One path used ike23 still, instead of exim.dev.20160529.3; now both
519 execution flows will use the same DH primes (currently
520 exim.dev.20160529.3).
522 JH/25 OpenSSL: Fix back-compatibility behaviour surrounding tls_certificates
523 option in smtp transport, to match the documentation. Previously
524 verification was not being done in some cases where it should have been.
526 JH/26 Bug 2646: fix a memory usage issue in ldap lookups. Previously, when more
527 than one server was defined and depending on the platform memory layout
528 details, an internal consistency trap could be hit while walking the list
531 JH/27 Bug 2648: fix the passing of an authenticator public-name through spool
532 files. The value is used by the authresults expansion item. Previously
533 if this was used in a router or transport, a crash could result.
535 JH/28 Fix spurious logging of select error. Some platforms, notably FreeBSD,
536 have a sufficient incidence of EINTR returns from select that an
537 interaction with other operations done by the main daemon loop exposed
538 a bug in the error-handling. This was benign apart from the log
541 JH/29 Bug 2675: add outgoing-interface I= element to deferred "==" log lines,
542 for consistency with delivered "=>" and failed "**" lines. While we're
543 there, handle PRX and TFO.
545 JH/30 Bug 2677: fix matching of long addresses. Since 4.93 a limit of 256 was
546 applied. This resulted, if any header-line rewrite rules were configured,
547 in a panic-log triggerable by sending a message with a long address in
548 a header. Fix by increasing the arbitrary limit to larger than a single
549 (dewrapped) 5322 header line maximum size.
551 JH/31 The ESMTP option name advertised for the SUPPORT_EARLY_PIPE build option
552 is changed from X_PIPE_CONNECT to PIPE_CONNECT. This is in line with
553 RFC 6648 which deprecates X- options in protocols as a general practice.
554 Changeover between the implementations is handled by the mechanisms
557 JH/32 Bug 2599: fix delay of delivery to a local address where there is also
558 a remote which uses callout/hold. Previously the local was queued.
560 JH/33 Fix a taint trap in the ${listextract } expansion when the source data
563 JH/34 Fix the placement of a multiple-message delivery marker in the delivery
564 log line. The asterisk is now consistently appended to the remote IP
565 (and port, if given), and will also be provided on defer and fail log
566 lines. Previously it could be placed on the local IP if that was being
567 logged, and was only provided on delivery lines.
569 JH/35 Bug 2343: Harden exim_tidydb against corrupt wait- files.
571 JH/36 Bug 2687: Fix interpretation of multiple ^ chars in a plaintext
572 authenticator client_send option. Previously the next char, after a pair
573 was collapsed, was taken verbatim (so ^^^foo became ^^foo; ^^^^foo became
574 ^^\x00foo). Fixed to get ^\x00foo and ^^foo respectively to match the
575 documentation. There is still no way to get a leading ^ immediately
576 after a NUL (ie. for the password of a PLAIN method authenticator.
578 JH/37 Enforce the expected size, for fixed-size records read from hints-DB
579 files. For bad sizes read, delete the record and whine to paniclog.
581 JH/38 When logging an AUTH failure, as server, do not include sensitive
582 information. Previously, the credentials would be included if given
583 as part of the AUTH command line and an ACL denied authentication.
585 JH/39 Bug 2691: fix $local_part_data. When the matching list element
586 referred to a file, bad data was returned. This likely also affected
589 JH/40 The gsasl authenticator now supports caching of the salted password
590 generated by the client-side implementation. This required the addition
591 of a new variable: $auth4.
593 JH/41 Fix daemon SIGHUP on FreeBSD. Previously, a named socket for IPC was
594 left undeleted; the attempt to re-create it then failed - resulting in
595 the usual "SIGHUP tp have daemon reload configuration" to not work.
596 This affected any platform not supporting "abstract" Unix-domain
597 sockets (i.e. not Linux).
599 JH/42 Bug 2693: Harden against a peer which reneges on a 452 "too many
600 recipients" response to RCPT in a later response, with a 250. The
601 previous coding assumed this would not happen, and under PIPELINING
602 would result in both lost and duplicate recipients for a message.
604 JH/43 Bug 2694: Fix weighted distribution of work to multiple spamd servers.
605 Previously the weighting was incorrectly applied. Similar fix for socks
606 proxies. Found and fixed by Heiko Schlichting.
608 JH/44 Bug 2701: Fix list-expansion of dns_ipv4_lookup. Previously, it did
609 not handle sub-lists included using the +namedlist syntax. While
610 investigating, the same found for dns_trust_aa, dns_again_means_nonexist,
611 dnssec_require_domains, dnssec_request_domains, srv_fail_domains,
614 JH/45 Use a (new) separate store pool-pair for DKIM verify working data.
615 Previously the permanent pool was used, so the sore could not be freed.
616 This meant a connection with many messages would use continually-growing
619 JH/46 Use an exponentially-increasing block size when malloc'ing store. Do it
620 per-pool so as not to waste too much space. Previously a constant size
621 was used which resulted in O(n^2) behaviour; now we get O(n log n) making
622 DOS attacks harder. The cost is wasted memory use in the larger blocks.
624 JH/47 Use explicit alloc/free for DNS lookup workspace. This permits using the
625 same space repeatedly, and a smaller process footprint.
627 JH/48 Use a less bogus-looking filename for a temporary used for DH-parameters
628 for GnuTLS. Previously the name started "%s" which, while not a bug,
629 looked as if if might be one.
631 JH/49 Bug 2710: when using SOCKS for additional messages after the first (a
632 "continued connection") make the $proxy_* variables available. Previously
633 the information was not passed across the exec() call for subsequent
634 transport executions. This also mean that the log lines for the
635 messages can show the proxy information.
637 JH/50 Bug 2672: QT elements in log lines, unless disabled, now exclude the
638 receive time. With modern systems the difference is significant.
639 The historical behaviour can be restored by disabling (a new) log_selector
640 "queue_time_exclusive".
642 JH/51 Taint-check ACL line. Previously, only filenames (for out-of-line ACL
643 content) were specifically tested for. Now, also cover expansions
644 resulting in ACL names and inline ACL content.
646 JH/52 Fix ${ip6norm:} operator. Previously, any trailing line text was dropped,
647 making it unusable in complex expressions.
649 JH/53 Bug 2743: fix immediate-delivery via named queue. Previously this would
650 fail with a taint-check on the spoolfile name, and leave the message
653 HS/01 Enforce absolute PID file path name.
655 HS/02 Handle SIGINT as we handle SIGTERM: terminate the Exim process.
657 PP/01 Add a too-many-bad-recipients guard to the default config's RCPT ACL.
659 PP/02 Bug 2643: Correct TLS DH constants.
660 A missing NUL termination in our code-generation tool had led to some
661 incorrect Diffie-Hellman constants in the Exim source.
662 Reported by kylon94, code-gen tool fix by Simon Arlott.
664 PP/03 Impose security length checks on various command-line options.
665 Fixes CVE-2020-SPRSS reported by Qualys.
667 PP/04 Fix Linux security issue CVE-2020-SLCWD and guard against PATH_MAX
668 better. Reported by Qualys.
670 PP/05 Fix security issue CVE-2020-PFPSN and guard against cmdline invoker
671 providing a particularly obnoxious sender full name.
674 PP/06 Fix CVE-2020-28016 (PFPZA): Heap out-of-bounds write in parse_fix_phrase()
676 PP/07 Refuse to allocate too little memory, block negative/zero allocations.
679 PP/08 Change default for recipients_max from unlimited to 50,000.
681 PP/09 Fix security issue with too many recipients on a message (to remove a
682 known security problem if someone does set recipients_max to unlimited,
683 or if local additions add to the recipient list).
684 Fixes CVE-2020-RCPTL reported by Qualys.
686 PP/10 Fix security issue in SMTP verb option parsing
687 Fixes CVE-2020-EXOPT reported by Qualys.
689 PP/11 Fix security issue in BDAT state confusion.
690 Ensure we reset known-good where we know we need to not be reading BDAT
691 data, as a general case fix, and move the places where we switch to BDAT
692 mode until after various protocol state checks.
693 Fixes CVE-2020-BDATA reported by Qualys.
695 HS/03 Die on "/../" in msglog file names
697 QS/01 Creation of (database) files in $spool_dir: only uid=0 or the uid of
698 the Exim runtime user are allowed to create files.
700 QS/02 PID file creation/deletion: only possible if uid=0 or uid is the Exim
703 QS/03 When reading the output from interpreted forward files we do not
704 pass the pipe between the parent and the interpreting process to
705 executed child processes (if any).
707 QS/04 Always die if requested from internal logging, even is logging is
710 JH/54 DMARC: recent versions of the OpenDMARC library appear to have broken
711 the API; compilation noo longer completes with DMARC support included.
712 This affects 1.4.1-1 on Fedora 33 (1.3.2-3 is functional); and has
713 been reported on other platforms.
715 JH/55 TLS: as server, reject connections with ALPN indicating non-smtp use.
717 JH/56 Make the majority of info read from config files readonly, for defence-in-
718 depth against exploits. Suggestion by Qualys.
719 Not supported on Solaris 10.
721 JH/57 Fix control=fakreject for a custom message containing tainted data.
722 Previously this resulted in a log complaint, due to a re-expansion present
723 since fakereject was originally introduced.
725 JH/58 GnuTLS: Fix certextract expansion. If a second modifier after a tag
726 modifier was given, a loop resulted.
728 JH/59 DKIM: Fix small-message verification under TLS with chunking. If a
729 pipelined SMTP command followed the BDAT LAST then it would be
730 incorrectly treated as part of the message body, causing a verification
733 JH/60 Bug 2805: Fix logging of domain-literals in Message_ID: headers. They
734 require looser validation rules than those for 821-level addresses,
735 which only permit IP addresses.
741 JH/01 Avoid costly startup code when not strictly needed. This reduces time
742 for some exim process initialisations. It does mean that the logging
743 of TLS configuration problems is only done for the daemon startup.
745 JH/02 Early-pipelining support code is now included unless disabled in Makefile.
747 JH/03 DKIM verification defaults no long accept sha1 hashes, to conform to
748 RFC 8301. They can still be enabled, using the dkim_verify_hashes main
751 JH/04 Support CHUNKING from an smtp transport using a transport_filter, when
752 DKIM signing is being done. Previously a transport_filter would always
753 disable CHUNKING, falling back to traditional DATA.
755 JH/05 Regard command-line recipients as tainted.
757 JH/06 Bug 340: Remove the daemon pid file on exit, when due to SIGTERM.
759 JH/07 Bug 2489: Fix crash in the "pam" expansion condition. It seems that the
760 PAM library frees one of the arguments given to it, despite the
761 documentation. Therefore a plain malloc must be used.
763 JH/08 Bug 2491: Use tainted buffers for the transport smtp context. Previously
764 on-stack buffers were used, resulting in a taint trap when DSN information
765 copied from a received message was written into the buffer.
767 JH/09 Bug 2493: Harden ARC verify against Outlook, whick has been seen to mix
768 the ordering of its ARC headers. This caused a crash.
770 JH/10 Bug 2492: Use tainted memory for retry record when needed. Previously when
771 a new record was being constructed with information from the peer, a trap
774 JH/11 Bug 2494: Unset the default for dmarc_tld_file. Previously a naiive
775 installation would get error messages from DMARC verify, when it hit the
776 nonexistent file indicated by the default. Distros wanting DMARC enabled
777 should both provide the file and set the option.
778 Also enforce no DMARC verification for command-line sourced messages.
780 JH/12 Fix an uninitialised flag in early-pipelining. Previously connections
781 could, depending on the platform, hang at the STARTTLS response.
783 JH/13 Bug 2498: Reset a counter used for ARC verify before handling another
784 message on a connection. Previously if one message had ARC headers and
785 the following one did not, a crash could result when adding an
786 Authentication-Results: header.
788 JH/14 Bug 2500: Rewind some of the common-coding in string handling between the
789 Exim main code and Exim-related utities. The introduction of taint
790 tracking also did many adjustments to string handling. Since then, eximon
791 frequently terminated with an assert failure.
793 JH/15 When PIPELINING, synch after every hundred or so RCPT commands sent and
794 check for 452 responses. This slightly helps the inefficieny of doing
795 a large alias-expansion into a recipient-limited target. The max_rcpt
796 transport option still applies (and at the current default, will override
797 the new feature). The check is done for either cause of synch, and forces
798 a fast-retry of all 452'd recipients using a new MAIL FROM on the same
799 connection. The new facility is not tunable at this time.
801 JH/16 Fix the variables set by the gsasl authenticator. Previously a pointer to
802 library live data was being used, so the results became garbage. Make
803 copies while it is still usable.
805 JH/17 Logging: when the deliver_time selector ise set, include the DT= field
806 on delivery deferred (==) and failed (**) lines (if a delivery was
807 attemtped). Previously it was only on completion (=>) lines.
809 JH/18 Authentication: the gsasl driver not provides the $authN variables in time
810 for the expansion of the server_scram_iter and server_scram_salt options.
812 WB/01 SPF: DNS lookups for the obsolete SPF RR type done by the libspf2 library
813 are now specifically given a NO_DATA response without hitting the system
814 resolver. The library goes on to do the now-standard TXT lookup.
815 Use of dnsdb lookups is not affected.
817 JH/19 Bug 2507: Modules: on handling a dynamic-module (lookups) open failure,
818 only retrieve the errormessage once. Previously two calls to dlerror()
819 were used, and the second one (for mainlog/paniclog) retrieved null
822 JH/20 Taint checking: disallow use of tainted data for
823 - the appendfile transport file and directory options
824 - the pipe transport command
825 - the autoreply transport file, log and once options
826 - file names used by the redirect router (including filter files)
828 - paths used by single-key lookups
829 Previously this was permitted.
831 JH/21 Bug 2501: Fix init call in the heimdal authenticator. Previously it
832 adjusted the size of a major service buffer; this failed because the
833 buffer was in use at the time. Change to a compile-time increase in the
834 buffer size, when this authenticator is compiled into exim.
836 JH/22 Taint-checking: move to safe-mode taint checking on all platforms. The
837 previous fast-mode was untenable in the face of glibs using mmap to
838 support larger malloc requests.
840 PP/01 Update the openssl_options possible values through OpenSSL 1.1.1c.
841 New values supported, if defined on system where compiled:
842 allow_no_dhe_kex, cryptopro_tlsext_bug, enable_middlebox_compat,
843 no_anti_replay, no_encrypt_then_mac, prioritize_chacha, tlsext_padding
845 JH/23 Performance improvement in the initial phase of a two-pass queue run. By
846 running a limited number of proceses in parallel, a benefit is gained. The
847 amount varies with the platform hardware and load. The use of the option
848 queue_run_in_order means we cannot do this, as ordering becomes
851 JH/24 Bug 2524: fix the cyrus_sasl auth driver gssapi usage. A previous fix
852 had introduced a string-copy (for ensuring NUL-termination) which was not
853 appropriate for that case, which can include embedded NUL bytes in the
854 block of data. Investigation showed the copy to actually be needless, the
855 data being length-specified.
857 JH/25 Fix use of concurrent TLS connections under GnuTLS. When a callout was
858 done during a receiving connection, and both used TLS, global info was
859 used rather than per-connection info for tracking the state of data
860 queued for transmission. This could result in a connection hang.
862 JH/26 Fix use of the SIZE parameter on MAIL commands, on continued connections.
863 Previously, when delivering serveral messages down a single connection
864 only the first would provide a SIZE. This was due to the size information
865 not being properly tracked.
867 JH/27 Bug 2530: When operating in a timezone with sub-minute offset, such as
868 TAI (at 37 seconds currently), pretend to be in UTC for time-related
869 expansion and logging. Previously, spurious values such as a future
870 minute could be seen.
872 JH/28 Bug 2533: Fix expansion of ${tr } item. When called in some situations
873 it could crash from a null-deref. This could also affect the
874 ${addresses: } operator and ${readsock } item.
876 JH/29 Bug 2537: Fix $mime_part_count. When a single connection had a non-mime
877 message following a mime one, the variable was not reset.
879 JH/30 When an pipelined-connect fails at the first response, assume incorrect
880 cached capability (perhaps the peer reneged?) and immediately retry in
883 JH/31 Fix spurious detection of timeout while writing to transport filter.
885 JH/32 Bug 2541: Fix segfault on bad cmdline -f (sender) argument. Previously
886 an attempt to copy the string was made before checking it.
888 JH/33 Fix the dsearch lookup to return an untainted result. Previously the
889 taint of the lookup key was maintained; we now regard the presence in the
890 filesystem as sufficient validation.
892 JH/34 Fix the readsocket expansion to not segfault when an empty "options"
893 argument is supplied.
895 JH/35 The dsearch lookup now requires that the directory is an absolute path.
896 Previously this was not checked, and nonempty relative paths made an
897 access under Exim's current working directory.
899 JH/36 Bug 2554: Fix msg:defer event for the hosts_max_try_hardlimit case.
900 Previously no event was raised.
902 JH/37 Bug 2552: Fix the check on spool space during reception to use the SIZE
903 parameter supplied by the sender MAIL FROM command. Previously it was
904 ignored, and only the check_spool_space option value for the required
907 JH/38 Fix $dkim_key_length. This should, after a DKIM verification, present
908 the size of the signing public-key. Previously it was instead giving
909 the size of the signature hash.
911 JH/39 DKIM verification: the RFC 8301 restriction on sizes of RSA keys is now
912 the default. See the (new) dkim_verify_min_keysizes option.
914 JH/40 Fix a memory-handling bug: when a connection carried multiple messages
915 and an ACL use a lookup for checking either the local_part or domain,
916 stale data could be accessed. Ensure that variable references are
917 dropped between messages.
919 JH/41 Bug 2571: Fix SPA authenticator. Running as a server, an offset supplied
920 by the client was not checked as pointing within response data before
921 being used. A malicious client could thus cause an out-of-bounds read and
922 possibly gain authentication. Fix by adding the check.
924 JH/42 Internationalisation: change the default for downconversion in the smtp
925 transport to be "if needed". Previously it was "as previously set" for
926 the message, which usually meant "if needed" for message-submission but
927 "no" for everything else. However, MTAs have been seen using SMTPUTF8
928 even when the envelope addresses did not need it, resulting in forwarding
929 failures to non-supporting MTAs. A downconvert in such cases will be
930 a no-op on the addresses, merely dropping the use of SMTPUTF8 by the
931 transport. The change does mean that addresses needing conversion will
932 be converted when previously a delivery failure would occur.
934 JH/43 Fix possible long line in DSN. Previously when a very long SMTP error
935 response was received it would be used unchecked in a fail-DSN, violating
936 standards on line-length limits. Truncate if needed.
938 HS/01 Remove parameters of the link to www.open-spf.org. The linked form
939 doesn't work. (Additionally add a new main config option to configure the
946 JH/01 OpenSSL: With debug enabled output keying information sufficient, server
947 side, to decode a TLS 1.3 packet capture.
949 JH/02 OpenSSL: Suppress the sending of (stateful) TLS1.3 session tickets.
950 Previously the default library behaviour applied, sending two, each in
953 JH/03 Debug output for ACL now gives the config file name and line number for
956 JH/04 The default received_header_text now uses the RFC 8314 tls cipher clause.
958 JH/05 DKIM: ensure that dkim_domain elements are lowercased before use.
960 JH/06 Fix buggy handling of autoreply bounce_return_size_limit, and a possible
961 buffer overrun for (non-chunking) other transports.
963 JH/07 GnuTLS: Our use of late (post-handshake) certificate verification, under
964 TLS1.3, means that a server rejecting a client certificate is not visible
965 to the client until the first read of encrypted data (typically the
966 response to EHLO). Add detection for that case and treat it as a failed
967 TLS connection attempt, so that the normal retry-in-clear can work (if
968 suitably configured).
970 JB/01 Bug 2375: fix expansions of 822 addresses having comments in local-part
971 and/or domain. Found and fixed by Jason Betts.
973 JH/08 Add hardening against SRV & TLSA lookups the hit CNAMEs (a nonvalid
974 configuration). If a CNAME target was not a wellformed name pattern, a
977 JH/09 Logging: Fix initial listening-on line for multiple ports for an IP when
978 the OS reports them interleaved with other addresses.
980 JH/10 OpenSSL: Fix aggregation of messages. Previously, when PIPELINING was
981 used both for input and for a verify callout, both encrypted, SMTP
982 responses being sent by the server could be lost. This resulted in
983 dropped connections and sometimes bounces generated by a peer sending
986 JH/11 Harden plaintext authenticator against a badly misconfigured client-send
987 string. Previously it was possible to cause undefined behaviour in a
988 library routine (usually a crash). Found by "zerons".
990 JH/12 Bug 2384: fix "-bP smtp_receive_timeout". Previously it returned no
993 JH/13 Bug 2386: Fix builds with Dane under LibreSSL 2.9.0 onward. Some old
994 API was removed, so update to use the newer ones.
996 JH/14 Bug 1891: Close the log file if receiving a non-smtp message, without
997 any timeout set, is taking a long time. Previously we would hang on to a
998 rotated logfile "forever" if the input was arriving with long gaps
999 (a previous attempt to fix addressed lack, for a long time, of initial
1002 HS/01 Bug 2390: Use message_id for tempfile creation to avoid races in a
1003 shared (NFS) environment. The length of the tempfile name is now
1004 4 + 16 ("hdr.$message_exim_id") which might break on file
1005 systems which restrict the file name length to lower values.
1006 (It was "hdr.$pid".)
1008 HS/02 Bug 2390: Use message_id for tempfile creation to avoid races in a
1009 shared (NFS) environment.
1011 HS/03 Bug 2392: exigrep does case sensitive *option* processing (as it
1012 did for all versions <4.90). Notably -M, -m, --invert, -I may be
1015 JH/15 Use unsigned when creating bitmasks in macros, to avoid build errors
1016 on some platforms for bit 31.
1018 JH/16 GnuTLS: rework ciphersuite strings under recent library versions. Thanks
1019 to changes apparently associated with TLS1.3 handling some of the APIs
1020 previously used were either nonfunctional or inappropriate. Strings
1021 like TLS1.3:ECDHE_SECP256R1__RSA_PSS_RSAE_SHA256__AES_256_GCM__AEAD:256
1022 and TLS1.2:ECDHE_SECP256R1__RSA_SHA256__AES_128_CBC__SHA256:128 replace
1023 the previous TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256 .
1024 This affects log line X= elements, the $tls_{in,out}_cipher variables,
1025 and the use of specific cipher names in the encrypted= ACL condition.
1027 JH/17 OpenSSL: the default openssl_options now disables ssl_v3.
1029 JH/18 GnuTLS: fix $tls_out_ocsp under hosts_request_ocsp. Previously the
1030 verification result was not updated unless hosts_require_ocsp applied.
1032 JH/19 Bug 2398: fix listing of a named-queue. Previously, even with the option
1033 queue_list_requires_admin set to false, non-admin users were denied the
1036 JH/20 Bug 2389: fix server advertising of usable certificates, under GnuTLS in
1037 directory-of-certs mode. Previously they were advertised despite the
1040 JH/21 The smtp transport option "hosts_noproxy_tls" is now unset by default.
1041 A single TCP connection by a client will now hold a TLS connection open
1042 for multiple message deliveries, by default. Previously the default was to
1045 JH/22 The smtp transport option "hosts_try_dane" now enables all hosts by
1046 default. If built with the facility, DANE will be used. The facility
1047 SUPPORT_DANE is now enabled in the prototype build Makefile "EDITME".
1049 JH/23 The build default is now for TLS to be included; the SUPPORT_TLS define
1050 is replaced with DISABLE_TLS. Either USE_GNUTLS or (the new) USE_OPENSSL
1051 must be defined and you must still, unless you define DISABLE_TLS, manage
1052 the the include-dir and library-file requirements that go with that
1053 choice. Non-TLS builds are still supported.
1055 JH/24 Fix duplicated logging of peer name/address, on a transport connection-
1058 JH/25 The smtp transport option "hosts_try_fastopen" now enables all hosts by
1059 default. If the platform supports and has the facility enabled, it will
1060 be requested on all coneections.
1062 JH/26 The PIPE_CONNECT facility is promoted from experimental status and is now
1063 controlled by the build-time option SUPPORT_PIPE_CONNECT.
1065 PP/01 Unbreak heimdal_gssapi, broken in 4.92.
1067 JH/27 Bug 2404: Use the main-section configuration option "dsn_from" for
1068 success-DSN messages. Previously the From: header was always the default
1069 one for these; the option was ignored.
1071 JH/28 Fix the timeout on smtp response to apply to the whole response.
1072 Previously it was reset for every read, so a teergrubing peer sending
1073 single bytes within the time limit could extend the connection for a
1074 long time. Credit to Qualsys Security Advisory Team for the discovery.
1076 JH/29 Fix DSN Final-Recipient: field. Previously it was the post-routing
1077 delivery address, which leaked information of the results of local
1078 forwarding. Change to the original envelope recipient address, per
1081 JH/30 Bug 2411: Fix DSN generation when RFC 3461 failure notification is
1082 requested. Previously not bounce was generated and a log entry of
1083 error ignored was made.
1085 JH/31 Avoid re-expansion in ${sort } expansion. (CVE-2019-13917)
1087 JH/32 Introduce a general tainting mechanism for values read from the input
1088 channel, and values derived from them. Refuse to expand any tainted
1089 values, to catch one form of exploit.
1091 JH/33 Bug 2413: Fix dkim_strict option. Previously the expansion result
1092 was unused and the unexpanded text used for the test. Found and
1093 fixed by Ruben Jenster.
1095 JH/34 Fix crash after TLS shutdown. When the TCP/SMTP channel was left open,
1096 an attempt to use a TLS library read routine dereffed a nul pointer,
1099 JH/35 Bug 2409: filter out-of-spec chars from callout response before using
1100 them in our smtp response.
1102 JH/36 Have the general router option retry_use_local_part default to true when
1103 any of the restrictive preconditions are set (to anything). Previously it
1104 was only for check_local user. The change removes one item of manual
1105 configuration which is required for proper retries when a remote router
1106 handles a subset of addresses for a domain.
1108 JH/37 Appendfile: when evaluating quota use (non-quota_size_regex) take the file
1109 link count into consideration.
1111 HS/04 Fix handling of very log lines in -H files. If a -<key> <value> line
1112 caused the extension of big_buffer, the following lines were ignored.
1114 JH/38 Bug 1395: Teach the DNS negative-cache about TTL value from the SOA in
1115 accordance with RFC 2308. Previously there was no expiry, so a longlived
1116 receive process (eg. due to ACL delays) versus a short SOA value could
1119 HS/05 Handle trailing backslash gracefully. (CVE-2019-15846)
1121 JH/39 Promote DMARC support to mainline.
1123 JH/40 Bug 2452: Add a References: header to DSNs.
1125 JH/41 With GnuTLS 3.6.0 (and later) do not attempt to manage Diffie-Hellman
1126 parameters. The relevant library call is documented as "Deprecated: This
1127 function is unnecessary and discouraged on GnuTLS 3.6.0 or later. Since
1128 3.6.0, DH parameters are negotiated following RFC7919."
1130 HS/06 Change the default of dnssec_request_domains to "*"
1132 JH/42 Bug 2545: Fix CHUNKING for all RCPT commands rejected. Previously we
1133 carried on and emitted a BDAT command, even when PIPELINING was not
1136 JH/43 Bug 2465: Fix taint-handling in dsearch lookup. Previously a nontainted
1137 buffer was used for the filename, resulting in a trap when tainted
1138 arguments (eg. $domain) were used.
1140 JH/44 With OpenSSL 1.1.1 (onwards) disable renegotiation for TLS1.2 and below;
1141 recommended to avoid a possible server-load attack. The feature can be
1142 re-enabled via the openssl_options main cofiguration option.
1144 JH/45 local_scan API: documented the current smtp_printf() call. This changed
1145 for version 4.90 - adding a "more data" boolean to the arguments.
1146 Bumped the ABI version number also, this having been missed previously;
1147 release versions 4.90 to 4.92.3 inclusive were effectively broken in
1148 respect of usage of smtp_printf() by either local_scan code or libraries
1149 accessed via the ${dlfunc } expansion item. Both will need coding
1150 adjustment for any calls to smtp_printf() to match the new function
1151 signature; a FALSE value for the new argument is always safe.
1153 JH/46 FreeBSD: fix use of the sendfile() syscall. The shim was not updating
1154 the file-offset (which the Linux syscall does, and exim expects); this
1155 resulted in an indefinite loop.
1157 JH/47 ARC: fix crash in signing, triggered when a configuration error failed
1158 to do ARC verification. The Authentication-Results: header line added
1159 by the configuration then had no ARC item.
1161 JH/48 Bug 2784: fix shutdown=no in the ${readsocket) expansion item. Previously
1162 an incorrect mode was used for reading the result, resulting in it being
1169 JH/01 Remove code calling the customisable local_scan function, unless a new
1170 definition "HAVE_LOCAL_SCAN=yes" is present in the Local/Makefile.
1172 JH/02 Bug 1007: Avoid doing logging from signal-handlers, as that can result in
1173 non-signal-safe functions being used.
1175 JH/03 Bug 2269: When presented with a received message having a stupidly large
1176 number of DKIM-Signature headers, disable DKIM verification to avoid
1177 a resource-consumption attack. The limit is set at twenty.
1179 JH/04 Add variables $arc_domains, $arc_oldest_pass for ARC verify. Fix the
1180 report of oldest_pass in ${authres } in consequence, and separate out
1181 some descriptions of reasons for verification fail.
1183 JH/05 Bug 2273: Cutthrough delivery left a window where the received messsage
1184 files in the spool were present and unlocked. A queue-runner could spot
1185 them, resulting in a duplicate delivery. Fix that by doing the unlock
1186 after the unlink. Investigation by Tim Stewart. Take the opportunity to
1187 add more error-checking on spoolfile handling while that code is being
1190 PP/01 Refuse to open a spool data file (*-D) if it's a symlink.
1191 No known attacks, no CVE, this is defensive hardening.
1193 JH/06 Bug 2275: The MIME ACL unlocked the received message files early, and
1194 a queue-runner could start a delivery while other operations were ongoing.
1195 Cutthrough delivery was a common victim, resulting in duplicate delivery.
1196 Found and investigated by Tim Stewart. Fix by using the open message data
1197 file handle rather than opening another, and not locally closing it (which
1198 releases a lock) for that case, while creating the temporary .eml format
1199 file for the MIME ACL. Also applies to "regex" and "spam" ACL conditions.
1201 JH/07 Bug 177: Make a random-recipient callout success visible in ACL, by setting
1202 $sender_verify_failure/$recipient_verify_failure to "random".
1204 JH/08 When generating a selfsigned cert, use serial number 1 since zero is not
1207 JH/09 Bug 2274: Fix logging of cmdline args when starting in an unlinked cwd.
1208 Previously this would segfault.
1210 JH/10 Fix ARC signing for case when DKIM signing failed. Previously this would
1213 JH/11 Bug 2264: Exim now only follows CNAME chains one step by default. We'd
1214 like zero, since the resolver should be doing this for us, But we need one
1215 as a CNAME but no MX presence gets the CNAME returned; we need to check
1216 that doesn't point to an MX to declare it "no MX returned" rather than
1217 "error, loop". A new main option is added so the older capability of
1218 following some limited number of chain links is maintained.
1220 JH/12 Add client-ip info to non-pass iprev ${authres } lines.
1222 JH/13 For receent Openssl versions (1.1 onward) use modern generic protocol
1223 methods. These should support TLS 1.3; they arrived with TLS 1.3 and the
1224 now-deprecated earlier definitions used only specified the range up to TLS
1225 1.2 (in the older-version library docs).
1227 JH/14 Bug 2284: Fix DKIM signing for body lines starting with a pair of dots.
1229 JH/15 Rework TLS client-side context management. Stop using a global, and
1230 explicitly pass a context around. This enables future use of TLS for
1231 connections to service-daemons (eg. malware scanning) while a client smtp
1232 connection is using TLS; with cutthrough connections this is quite likely.
1234 JH/16 Fix ARC verification to do AS checks in reverse order.
1236 JH/17 Support a "tls" option on the ${readsocket } expansion item.
1238 JH/18 Bug 2287: Fix the protocol name (eg utf8esmtp) for multiple messages
1239 using the SMTPUTF8 option on their MAIL FROM commands, in one connection.
1240 Previously the "utf8" would be re-prepended for every additional message.
1242 JH/19 Reject MAIL FROM commands with SMTPUTF8 when the facility was not advertised.
1243 Previously thery were accepted, resulting in issues when attempting to
1244 forward messages to a non-supporting MTA.
1246 PP/02 Let -n work with printing macros too, not just options.
1248 JH/20 Bug 2296: Fix cutthrough for >1 address redirection. Previously only
1249 one parent address was copied, and bogus data was used at delivery-logging
1250 time. Either a crash (after delivery) or bogus log data could result.
1251 Discovery and analysis by Tim Stewart.
1253 PP/03 Make ${utf8clean:} expansion operator detect incomplete final character.
1254 Previously if the string ended mid-character, we did not insert the
1255 promised '?' replacement.
1257 PP/04 Documentation: current string operators work on bytes, not codepoints.
1259 JH/21 Change as many as possible of the global flags into one-bit bitfields; these
1260 should pack well giving a smaller memory footprint so better caching and
1261 therefore performance. Group the declarations where this can't be done so
1262 that the byte-sized flag variables are not interspersed among pointer
1263 variables, giving a better chance of good packing by the compiler.
1265 JH/22 Bug 1896: Fix the envelope from for DMARC forensic reports to be possibly
1266 non-null, to avoid issues with sites running BATV. Previously reports were
1267 sent with an empty envelope sender so looked like bounces.
1269 JH/23 Bug 2318: Fix the noerror command within filters. It wasn't working.
1270 The ignore_error flag wasn't being returned from the filter subprocess so
1271 was not set for later routers. Investigation and fix by Matthias Kurz.
1273 JH/24 Bug 2310: Raise a msg:fail:internal event for each undelivered recipient,
1274 and a msg:complete for the whole, when a message is manually removed using
1275 -Mrm. Developement by Matthias Kurz, hacked on by JH.
1277 JH/25 Avoid fixed-size buffers for pathnames in DB access. This required using
1278 a "Gnu special" function, asprintf() in the DB utility binary builds; I
1279 hope that is portable enough.
1281 JH/26 Bug 2311: Fix DANE-TA verification under GnuTLS. Previously it was also
1282 requiring a known-CA anchor certificate; make it now rely entirely on the
1283 TLSA as an anchor. Checking the name on the leaf cert against the name
1284 on the A-record for the host is still done for TA (but not for EE mode).
1286 JH/27 Fix logging of proxy address. Previously, a pointless "PRX=[]:0" would be
1287 included in delivery lines for non-proxied connections, when compiled with
1288 SUPPORT_SOCKS and running with proxy logging enabled.
1290 JH/28 Bug 2314: Fire msg:fail:delivery event even when error is being ignored.
1291 Developement by Matthias Kurz, tweaked by JH. While in that bit of code,
1292 move the existing event to fire before the normal logging of message
1293 failure so that custom logging is bracketed by normal logging.
1295 JH/29 Bug 2322: A "fail" command in a non-system filter (file) now fires the
1296 msg:fail:internal event. Developement by Matthias Kurz.
1298 JH/30 Bug 2329: Increase buffer size used for dns lookup from 2k, which was
1299 far too small for todays use of crypto signatures stored there. Go all
1300 the way to the max DNS message size of 64kB, even though this might be
1301 overmuch for IOT constrained device use.
1303 JH/31 Fix a bad use of a copy function, which could be used to pointlessly
1304 copy a string over itself. The library routine is documented as not
1305 supporting overlapping copies, and on MacOS it actually raised a SIGABRT.
1307 JH/32 For main options check_spool_space and check_inode_space, where the
1308 platform supports 64b integers, support more than the previous 2^31 kB
1309 (i.e. more than 2 TB). Accept E, P and T multipliers in addition to
1310 the previous G, M, k.
1312 JH/33 Bug 2338: Fix the cyrus-sasl authenticator to fill in the
1313 $authenticated_fail_id variable on authentication failure. Previously
1316 JH/34 Increase RSA keysize of autogen selfsign cert from 1024 to 2048. RHEL 8.0
1317 OpenSSL didn't want to use such a weak key. Do for GnuTLS also, and for
1318 more-modern GnuTLS move from GNUTLS_SEC_PARAM_LOW to
1319 GNUTLS_SEC_PARAM_MEDIUM.
1321 JH/35 OpenSSL: fail the handshake when SNI processing hits a problem, server
1322 side. Previously we would continue as if no SNI had been received.
1324 JH/36 Harden the handling of string-lists. When a list consisted of a sole
1325 "<" character, which should be a list-separator specification, we walked
1326 off past the nul-terimation.
1328 JH/37 Bug 2341: Send "message delayed" warning MDNs (restricted to external
1329 causes) even when the retry time is not yet met. Previously they were
1330 not, meaning that when (say) an account was over-quota and temp-rejecting,
1331 and multiple senders' messages were queued, only one sender would get
1332 notified on each configured delay_warning cycle.
1334 JH/38 Bug 2351: Log failures to extract envelope addresses from message headers.
1336 JH/39 OpenSSL: clear the error stack after an SSL_accept(). With anon-auth
1337 cipher-suites, an error can be left on the stack even for a succeeding
1338 accept; this results in impossible error messages when a later operation
1341 AM/01 Bug 2359: GnuTLS: repeat lowlevel read and write operations while they
1342 return error codes indicating retry. Under TLS1.3 this becomes required.
1344 JH/40 Fix the feature-cache refresh for EXPERIMENTAL_PIPE_CONNECT. Previously
1345 it only wrote the new authenticators, resulting in a lack of tracking of
1346 peer changes of ESMTP extensions until the next cache flush.
1348 JH/41 Fix the loop reading a message header line to check for integer overflow,
1349 and more-often against header_maxsize. Previously a crafted message could
1350 induce a crash of the recive process; now the message is cleanly rejected.
1352 JH/42 Bug 2366: Fix the behaviour of the dkim_verify_signers option. It had
1353 been totally disabled for all of 4.91. Discovery and fix by "Mad Alex".
1359 GF/01 DEFER rather than ERROR on redis cluster MOVED response.
1360 When redis_servers is set to a list of > 1 element, and the Redis servers
1361 in that list are in cluster configuration, convert the REDIS_REPLY_ERROR
1362 case of MOVED into a DEFER case instead, thus moving the query onto the
1363 next server in the list. For a cluster of N elements, all N servers must
1364 be defined in redis_servers.
1366 GF/02 Catch and remove uninitialized value warning in exiqsumm
1367 Check for existence of @ARGV before looking at $ARGV[0]
1369 JH/01 Replace the store_release() internal interface with store_newblock(),
1370 which internalises the check required to safely use the old one, plus
1371 the allocate and data copy operations duplicated in both (!) of the
1372 extant use locations.
1374 JH/02 Disallow '/' characters in queue names specified for the "queue=" ACL
1375 modifier. This matches the restriction on the commandline.
1377 JH/03 Fix pgsql lookup for multiple result-tuples with a single column.
1378 Previously only the last row was returned.
1380 JH/04 Bug 2217: Tighten up the parsing of DKIM signature headers. Previously
1381 we assumed that tags in the header were well-formed, and parsed the
1382 element content after inspecting only the first char of the tag.
1383 Assumptions at that stage could crash the receive process on malformed
1386 JH/05 Bug 2215: Fix crash associated with dnsdb lookup done from DKIM ACL.
1387 While running the DKIM ACL we operate on the Permanent memory pool so that
1388 variables created with "set" persist to the DATA ACL. Also (at any time)
1389 DNS lookups that fail create cache records using the Permanent pool. But
1390 expansions release any allocations made on the current pool - so a dnsdb
1391 lookup expansion done in the DKIM ACL releases the memory used for the
1392 DNS negative-cache, and bad things result. Solution is to switch to the
1393 Main pool for expansions.
1394 While we're in that code, add checks on the DNS cache during store_reset,
1395 active in the testsuite.
1396 Problem spotted, and debugging aided, by Wolfgang Breyha.
1398 JH/06 Fix issue with continued-connections when the DNS shifts unreliably.
1399 When none of the hosts presented to a transport match an already-open
1400 connection, close it and proceed with the list. Previously we would
1401 queue the message. Spotted by Lena with Yahoo, probably involving
1404 JH/07 Bug 2214: Fix SMTP responses resulting from non-accept result of MIME ACL.
1405 Previously a spurious "250 OK id=" response was appended to the proper
1408 JH/08 The "support for" informational output now, which built with Content
1409 Scanning support, has a line for the malware scanner interfaces compiled
1410 in. Interface can be individually included or not at build time.
1412 JH/09 The "aveserver", "kavdaemon" and "mksd" interfaces are now not included
1413 by the template makefile "src/EDITME". The "STREAM" support for an older
1414 ClamAV interface method is removed.
1416 JH/10 Bug 2223: Fix mysql lookup returns for the no-data case (when the number of
1417 rows affected is given instead).
1419 JH/11 The runtime Berkeley DB library version is now additionally output by
1420 "exim -d -bV". Previously only the compile-time version was shown.
1422 JH/12 Bug 2230: Fix cutthrough routing for nonfirst messages in an initiating
1423 SMTP connection. Previously, when one had more recipients than the
1424 first, an abortive onward connection was made. Move to full support for
1425 multiple onward connections in sequence, handling cutthrough connection
1426 for all multi-message initiating connections.
1428 JH/13 Bug 2229: Fix cutthrough routing for nonstandard port numbers defined by
1429 routers. Previously, a multi-recipient message would fail to match the
1430 onward-connection opened for the first recipient, and cause its closure.
1432 JH/14 Bug 2174: A timeout on connect for a callout was also erroneously seen as
1433 a timeout on read on a GnuTLS initiating connection, resulting in the
1434 initiating connection being dropped. This mattered most when the callout
1435 was marked defer_ok. Fix to keep the two timeout-detection methods
1438 JH/15 Relax results from ACL control request to enable cutthrough, in
1439 unsupported situations, from error to silently (except under debug)
1440 ignoring. This covers use with PRDR, frozen messages, queue-only and
1443 HS/01 Fix Buffer overflow in base64d() (CVE-2018-6789)
1445 JH/16 Fix bug in DKIM verify: a buffer overflow could corrupt the malloc
1446 metadata, resulting in a crash in free().
1448 PP/01 Fix broken Heimdal GSSAPI authenticator integration.
1449 Broken in f2ed27cf5, missing an equals sign for specified-initialisers.
1450 Broken also in d185889f4, with init system revamp.
1452 JH/17 Bug 2113: Fix conversation closedown with the Avast malware scanner.
1453 Previously we abruptly closed the connection after reading a malware-
1454 found indication; now we go on to read the "scan ok" response line,
1457 JH/18 Bug 2239: Enforce non-usability of control=utf8_downconvert in the mail
1458 ACL. Previously, a crash would result.
1460 JH/19 Speed up macro lookups during configuration file read, by skipping non-
1461 macro text after a replacement (previously it was only once per line) and
1462 by skipping builtin macros when searching for an uppercase lead character.
1464 JH/20 DANE support moved from Experimental to mainline. The Makefile control
1465 for the build is renamed.
1467 JH/21 Fix memory leak during multi-message connections using STARTTLS. A buffer
1468 was allocated for every new TLS startup, meaning one per message. Fix
1469 by only allocating once (OpenSSL) or freeing on TLS-close (GnuTLS).
1471 JH/22 Bug 2236: When a DKIM verification result is overridden by ACL, DMARC
1472 reported the original. Fix to report (as far as possible) the ACL
1473 result replacing the original.
1475 JH/23 Fix memory leak during multi-message connections using STARTTLS under
1476 OpenSSL. Certificate information is loaded for every new TLS startup,
1477 and the resources needed to be freed.
1479 JH/24 Bug 2242: Fix exim_dbmbuild to permit directoryless filenames.
1481 JH/25 Fix utf8_downconvert propagation through a redirect router. Previously it
1484 JH/26 Bug 2253: For logging delivery lines under PRDR, append the overall
1485 DATA response info to the (existing) per-recipient response info for
1486 the "C=" log element. It can have useful tracking info from the
1487 destination system. Patch from Simon Arlott.
1489 JH/27 Bug 2251: Fix ldap lookups that return a single attribute having zero-
1490 length value. Previously this would segfault.
1492 HS/02 Support Avast multiline protoocol, this allows passing flags to
1493 newer versions of the scanner.
1495 JH/28 Ensure that variables possibly set during message acceptance are marked
1496 dead before release of memory in the daemon loop. This stops complaints
1497 about them when the debug_store option is enabled. Discovered specifically
1498 for sender_rate_period, but applies to a whole set of variables.
1499 Do the same for the queue-runner and queue-list loops, for variables set
1500 from spool message files. Do the same for the SMTP per-message loop, for
1501 certain variables indirectly set in ACL operations.
1503 JH/29 Bug 2250: Fix a longstanding bug in heavily-pipelined SMTP input (such
1504 as a multi-recipient message from a mailinglist manager). The coding had
1505 an arbitrary cutoff number of characters while checking for more input;
1506 enforced by writing a NUL into the buffer. This corrupted long / fast
1507 input. The problem was exposed more widely when more pipelineing of SMTP
1508 responses was introduced, and one Exim system was feeding another.
1509 The symptom is log complaints of SMTP syntax error (NUL chars) on the
1510 receiving system, and refused recipients seen by the sending system
1511 (propating to people being dropped from mailing lists).
1512 Discovered and pinpointed by David Carter.
1514 JH/30 The (EXPERIMENTAL_DMARC) variable $dmarc_ar_header is withdrawn, being
1515 replaced by the ${authresults } expansion.
1517 JH/31 Bug 2257: Fix pipe transport to not use a socket-only syscall.
1519 HS/03 Set a handler for SIGTERM and call exit(3) if running as PID 1. This
1520 allows proper process termination in container environments.
1522 JH/32 Bug 2258: Fix spool_wireformat in combination with LMTP transport.
1523 Previously the "final dot" had a newline after it; ensure it is CR,LF.
1525 JH/33 SPF: remove support for the "spf" ACL condition outcome values "err_temp"
1526 and "err_perm", deprecated since 4.83 when the RFC-defined words
1527 "temperror" and "permerror" were introduced.
1529 JH/34 Re-introduce enforcement of no cutthrough delivery on transports having
1530 transport-filters or DKIM-signing. The restriction was lost in the
1531 consolidation of verify-callout and delivery SMTP handling.
1532 Extend the restriction to also cover ARC-signing.
1534 JH/35 Cutthrough: for a final-dot response timeout (and nonunderstood responses)
1535 in defer=pass mode supply a 450 to the initiator. Previously the message
1538 PP/02 DANE: add dane_require_tls_ciphers SMTP Transport option; if unset,
1539 tls_require_ciphers is used as before.
1541 HS/03 Malware Avast: Better match the Avast multiline protocol. Add
1542 "pass_unscanned". Only tmpfails from the scanner are written to
1543 the paniclog, as they may require admin intervention (permission
1544 denied, license issues). Other scanner errors (like decompression
1545 bombs) do not cause a paniclog entry.
1547 JH/36 Fix reinitialisation of DKIM logging variable between messages.
1548 Previously it was possible to log spurious information in receive log
1551 JH/37 Bug 2255: Revert the disable of the OpenSSL session caching. This
1552 triggered odd behaviour from Outlook Express clients.
1554 PP/03 Add util/renew-opendmarc-tlds.sh script for safe renewal of public
1557 JH/38 DKIM: accept Ed25519 pubkeys in SubjectPublicKeyInfo-wrapped form,
1558 since the IETF WG has not yet settled on that versus the original
1559 "bare" representation.
1561 JH/39 Fix syslog logging for syslog_timestamp=no and log_selector +millisec.
1562 Previously the millisecond value corrupted the output.
1563 Fix also for syslog_pid=no and log_selector +pid, for which the pid
1564 corrupted the output.
1570 JH/01 Rework error string handling in TLS interface so that the caller in
1571 more cases is responsible for logging. This permits library-sourced
1572 string to be attached to addresses during delivery, and collapses
1573 pairs of long lines into single ones.
1575 PP/01 Allow PKG_CONFIG_PATH to be set in Local/Makefile and use it correctly
1576 during configuration. Wildcards are allowed and expanded.
1578 JH/02 Rework error string handling in DKIM to pass more info back to callers.
1579 This permits better logging.
1581 JH/03 Rework the transport continued-connection mechanism: when TLS is active,
1582 do not close it down and have the child transport start it up again on
1583 the passed-on TCP connection. Instead, proxy the child (and any
1584 subsequent ones) for TLS via a unix-domain socket channel. Logging is
1585 affected: the continued delivery log lines do not have any DNSSEC, TLS
1586 Certificate or OCSP information. TLS cipher information is still logged.
1588 JH/04 Shorten the log line for daemon startup by collapsing adjacent sets of
1589 identical IP addresses on different listening ports. Will also affect
1592 PP/02 Bug 2070: uClibc defines __GLIBC__ without providing glibc headers;
1593 add noisy ifdef guards to special-case this sillyness.
1594 Patch from Bernd Kuhls.
1596 JH/05 Tighten up the checking in isip4 (et al): dotted-quad components larger
1597 than 255 are no longer allowed.
1599 JH/06 Default openssl_options to include +no_ticket, to reduce load on peers.
1600 Disable the session-cache too, which might reduce our load. Since we
1601 currrectly use a new context for every connection, both as server and
1602 client, there is no benefit for these.
1603 GnuTLS appears to not support tickets server-side by default (we don't
1604 call gnutls_session_ticket_enable_server()) but client side is enabled
1605 by default on recent versions (3.1.3 +) unless the PFS priority string
1608 PP/03 Add $SOURCE_DATE_EPOCH support for reproducible builds, per spec at
1609 <https://reproducible-builds.org/specs/source-date-epoch/>.
1611 JH/07 Fix smtp transport use of limited max_rcpt under mua_wrapper. Previously
1612 the check for any unsuccessful recipients did not notice the limit, and
1613 erroneously found still-pending ones.
1615 JH/08 Pipeline CHUNKING command and data together, on kernels that support
1616 MSG_MORE. Only in-clear (not on TLS connections).
1618 JH/09 Avoid using a temporary file during transport using dkim. Unless a
1619 transport-filter is involved we can buffer the headers in memory for
1620 creating the signature, and read the spool data file once for the
1621 signature and again for transmission.
1623 JH/10 Enable use of sendfile in Linux builds as default. It was disabled in
1624 4.77 as the kernel support then wasn't solid, having issues in 64bit
1625 mode. Now, it's been long enough. Add support for FreeBSD also.
1627 JH/11 Bug 2104: Fix continued use of a transport connection with TLS. In the
1628 case where the routing stage had gathered several addresses to send to
1629 a host before calling the transport for the first, we previously failed
1630 to close down TLS in the old transport process before passing the TCP
1631 connection to the new process. The new one sent a STARTTLS command
1632 which naturally failed, giving a failed delivery and bloating the retry
1633 database. Investigation and fix prototype from Wolfgang Breyha.
1635 JH/12 Fix check on SMTP command input synchronisation. Previously there were
1636 false-negatives in the check that the sender had not preempted a response
1637 or prompt from Exim (running as a server), due to that code's lack of
1638 awareness of the SMTP input buffering.
1640 PP/04 Add commandline_checks_require_admin option.
1641 Exim drops privileges sanely, various checks such as -be aren't a
1642 security problem, as long as you trust local users with access to their
1643 own account. When invoked by services which pass untrusted data to
1644 Exim, this might be an issue. Set this option in main configuration
1645 AND make fixes to the calling application, such as using `--` to stop
1648 JH/13 Do pipelining under TLS. Previously, although safe, no advantage was
1649 taken. Now take care to pack both (client) MAIL,RCPT,DATA, and (server)
1650 responses to those, into a single TLS record each way (this usually means
1651 a single packet). As a side issue, smtp_enforce_sync now works on TLS
1654 PP/05 OpenSSL/1.1: use DH_bits() for more accurate DH param sizes. This
1655 affects you only if you're dancing at the edge of the param size limits.
1656 If you are, and this message makes sense to you, then: raise the
1657 configured limit or use OpenSSL 1.1. Nothing we can do for older
1660 JH/14 For the "sock" variant of the malware scanner interface, accept an empty
1661 cmdline element to get the documented default one. Previously it was
1664 JH/15 Fix a crash in the smtp transport caused when two hosts in succession
1665 are unsuable for non-message-specific reasons - eg. connection timeout,
1666 banner-time rejection.
1668 JH/16 Fix logging of delivery remote port, when specified by router, under
1671 PP/06 Repair manualroute's ability to take options in any order, even if one
1672 is the name of a transport.
1675 HS/01 Cleanup, prevent repeated use of -p/-oMr (CVE-2017-1000369)
1677 JH/17 Change the list-building routines interface to use the expanding-string
1678 triplet model, for better allocation and copying behaviour.
1680 JH/18 Prebuild the data-structure for "builtin" macros, for faster startup.
1681 Previously it was constructed the first time a possibly-matching string
1682 was met in the configuration file input during startup; now it is done
1685 JH/19 Bug 2141: Use the full-complex API for Berkeley DB rather than the legacy-
1686 compatible one, to avoid the (poorly documented) possibility of a config
1687 file in the working directory redirecting the DB files, possibly correpting
1688 some existing file. CVE-2017-10140 assigned for BDB.
1690 JH/20 Bug 2147: Do not defer for a verify-with-callout-and-random which is not
1691 cache-hot. Previously, although the result was properly cached, the
1692 initial verify call returned a defer.
1694 JH/21 Bug 2151: Avoid using SIZE on the MAIL for a callout verify, on any but
1695 the main verify for receipient in uncached-mode.
1697 JH/22 Retire historical build files to an "unsupported" subdir. These are
1698 defined as "ones for which we have no current evidence of testing".
1700 JH/23 DKIM: enforce the DNS pubkey record "h" permitted-hashes optional field,
1701 if present. Previously it was ignored.
1703 JH/24 Start using specified-initialisers in C structure init coding. This is
1704 a C99 feature (it's 2017, so now considered safe).
1706 JH/25 Use one-bit bitfields for flags in the "addr" data structure. Previously
1707 if was a fixed-sized field and bitmask ops via macros; it is now more
1710 PP/07 GitHub PR 56: Apply MariaDB build fix.
1711 Patch provided by Jaroslav Škarvada.
1713 PP/08 Bug 2161: Fix regression in sieve quoted-printable handling introduced
1714 during Coverity cleanups [4.87 JH/47]
1715 Diagnosis and fix provided by Michael Fischer v. Mollard.
1717 JH/26 Fix DKIM bug: when the pseudoheader generated for signing was exactly
1718 the right size to place the terminating semicolon on its own folded
1719 line, the header hash was calculated to an incorrect value thanks to
1720 the (relaxed) space the fold became.
1722 HS/02 Fix Bug 2130: large writes from the transport subprocess were chunked
1723 and confused the parent.
1725 JH/27 Fix SOCKS bug: an unitialized pointer was deref'd by the transport process
1726 which could crash as a result. This could lead to undeliverable messages.
1728 JH/28 Logging: "next input sent too soon" now shows where input was truncated
1731 JH/29 Fix queue_run_in_order to ignore the PID portion of the message ID. This
1732 matters on fast-turnover and PID-randomising systems, which were getting
1733 out-of-order delivery.
1735 JH/30 Fix a logging bug on aarch64: an unsafe routine was previously used for
1736 a possibly-overlapping copy. The symptom was that "Remote host closed
1737 connection in response to HELO" was logged instead of the actual 4xx
1740 JH/31 Fix CHUNKING code to properly flush the unwanted chunk after an error.
1741 Previously only that bufferd was discarded, resulting in SYMTP command
1744 JH/32 DKIM: when a message has multiple signatures matching an identity given
1745 in dkim_verify_signers, run the dkim acl once for each. Previously only
1746 one run was done. Bug 2189.
1748 JH/33 Downgrade an unfound-list name (usually a typo in the config file) from
1749 "panic the current process" to "deliberately defer". The panic log is
1750 still written with the problem list name; the mail and reject logs now
1751 get a temp-reject line for the message that was being handled, saying
1752 something like "domains check lookup or other defer". The SMTP 451
1753 message is still "Temporary local problem".
1755 JH/34 Bug 2199: Fix a use-after-free while reading smtp input for header lines.
1756 A crafted sequence of BDAT commands could result in in-use memory beeing
1757 freed. CVE-2017-16943.
1759 HS/03 Bug 2201: Fix checking for leading-dot on a line during headers reading
1760 from SMTP input. Previously it was always done; now only done for DATA
1761 and not BDAT commands. CVE-2017-16944.
1763 JH/35 Bug 2201: Flush received data in BDAT mode after detecting an error fatal
1764 to the message (such as an overlong header line). Previously this was
1765 not done and we did not exit BDAT mode. Followon from the previous item
1766 though a different problem.
1772 JH/01 Bug 1922: Support IDNA2008. This has slightly different conversion rules
1773 than -2003 did; needs libidn2 in addition to libidn.
1775 JH/02 The path option on a pipe transport is now expanded before use.
1777 PP/01 GitHub PR 50: Do not call ldap_start_tls_s on ldapi:// connections.
1778 Patch provided by "Björn", documentation fix added too.
1780 JH/03 Bug 2003: fix Proxy Protocol v2 handling: the address size field was
1781 missing a wire-to-host endian conversion.
1783 JH/04 Bug 2004: fix CHUNKING in non-PIPELINEING mode. Chunk data following
1784 close after a BDAT command line could be taken as a following command,
1785 giving a synch failure. Fix by only checking for synch immediately
1786 before acknowledging the chunk.
1788 PP/02 GitHub PR 52: many spelling fixes, which include fixing parsing of
1789 no_require_dnssec option and creation of _HAVE_TRANSPORT_APPEND_MAILDIR
1790 macro. Patches provided by Josh Soref.
1792 JH/05 Have the EHLO response advertise VRFY, if there is a vrfy ACL defined.
1793 Previously we did not; the RFC seems ambiguous and VRFY is not listed
1794 by IANA as a service extension. However, John Klensin suggests that we
1797 JH/06 Bug 2017: Fix DKIM verification in -bh test mode. The data feed into
1798 the dkim code may be unix-mode line endings rather than smtp wire-format
1799 CRLF, so prepend a CR to any bare LF.
1801 JH/07 Rationalise the coding for callout smtp conversations and transport ones.
1802 As a side-benfit, callouts can now use PIPELINING hence fewer round-trips.
1804 JH/08 Bug 2016: Fix DKIM verification vs. CHUNKING. Any BDAT commands after
1805 the first were themselves being wrongly included in the feed into dkim
1806 processing; with most chunk sizes in use this resulted in an incorrect
1807 body hash calculated value.
1809 JH/09 Bug 2014: permit inclusion of a DKIM-Signature header in a received
1810 DKIM signature block, for verification. Although advised against by
1811 standards it is specifically not ruled illegal.
1813 JH/10 Bug 2025: Fix reception of (quoted) local-parts with embedded spaces.
1815 JH/11 Bug 2029: Fix crash in DKIM verification when a message signature block is
1816 missing a body hash (the bh= tag).
1818 JH/12 Bug 2018: Re-order Proxy Protocol startup versus TLS-on-connect startup.
1819 It seems that HAProxy sends the Proxy Protocol information in clear and
1820 only then does a TLS startup, so do the same.
1822 JH/13 Bug 2027: Avoid attempting to use TCP Fast Open for non-transport client
1823 TCP connections (such as for Spamd) unless the daemon successfully set
1824 Fast Open mode on its listening sockets. This fixes breakage seen on
1825 too-old kernels or those not configured for Fast Open, at the cost of
1826 requiring both directions being enabled for TFO, and TFO never being used
1827 by non-daemon-related Exim processes.
1829 JH/14 Bug 2000: Reject messages recieved with CHUNKING but with malformed line
1830 endings, at least on the first header line. Try to canonify any that get
1831 past that check, despite the cost.
1833 JH/15 Angle-bracket nesting (an error inserted by broken sendmails) levels are
1834 now limited to an arbitrary five deep, while parsing addresses with the
1835 strip_excess_angle_brackets option enabled.
1837 PP/03 Bug 2018: For Proxy Protocol and TLS-on-connect, do not over-read and
1838 instead leave the unprompted TLS handshake in socket buffer for the
1839 TLS library to consume.
1841 PP/04 Bug 2018: Also handle Proxy Protocol v2 safely.
1843 PP/05 FreeBSD compat: handle that Ports no longer create /usr/bin/perl
1845 JH/16 Drop variables when they go out of scope. Memory management drops a whole
1846 region in one operation, for speed, and this leaves assigned pointers
1847 dangling. Add checks run only under the testsuite which checks all
1848 variables at a store-reset and panics on a dangling pointer; add code
1849 explicitly nulling out all the variables discovered. Fixes one known
1850 bug: a transport crash, where a dangling pointer for $sending_ip_address
1851 originally assigned in a verify callout, is re-used.
1853 PP/06 Drop '.' from @INC in various Perl scripts.
1855 PP/07 Switch FreeBSD iconv to always use the base-system libc functions.
1857 PP/08 Reduce a number of compilation warnings under clang; building with
1858 CC=clang CFLAGS+=-Wno-dangling-else -Wno-logical-op-parentheses
1859 should be warning-free.
1861 JH/17 Fix inbound CHUNKING when DKIM disabled at runtime.
1863 HS/01 Fix portability problems introduced by PP/08 for platforms where
1864 realloc(NULL) is not equivalent to malloc() [SunOS et al].
1866 HS/02 Bug 1974: Fix missing line terminator on the last received BDAT
1867 chunk. This allows us to accept broken chunked messages. We need a more
1868 general solution here.
1870 PP/09 Wrote util/chunking_fixqueue_finalnewlines.pl to help recover
1871 already-broken messages in the queue.
1873 JH/18 Bug 2061: Fix ${extract } corrupting an enclosing ${reduce } $value.
1875 JH/19 Fix reference counting bug in routing-generated-address tracking.
1881 JH/01 Use SIZE on MAIL FROM in a cutthrough connection, if the destination
1882 supports it and a size is available (ie. the sending peer gave us one).
1884 JH/02 The obsolete acl condition "demime" is removed (finally, after ten
1885 years of being deprecated). The replacements are the ACLs
1886 acl_smtp_mime and acl_not_smtp_mime.
1888 JH/03 Upgrade security requirements imposed for hosts_try_dane: previously
1889 a downgraded non-dane trust-anchor for the TLS connection (CA-style)
1890 or even an in-clear connection were permitted. Now, if the host lookup
1891 was dnssec and dane was requested then the host is only used if the
1892 TLSA lookup succeeds and is dnssec. Further hosts (eg. lower priority
1893 MXs) will be tried (for hosts_try_dane though not for hosts_require_dane)
1894 if one fails this test.
1895 This means that a poorly-configured remote DNS will make it incommunicado;
1896 but it protects against a DNS-interception attack on it.
1898 JH/04 Bug 1810: make continued-use of an open smtp transport connection
1899 non-noisy when a race steals the message being considered.
1901 JH/05 If main configuration option tls_certificate is unset, generate a
1902 self-signed certificate for inbound TLS connections.
1904 JH/06 Bug 165: hide more cases of password exposure - this time in expansions
1905 in rewrites and routers.
1907 JH/07 Retire gnutls_require_mac et.al. These were nonfunctional since 4.80
1908 and logged a warning sing 4.83; now they are a configuration file error.
1910 JH/08 Bug 1836: Fix crash in VRFY handling when handed an unqualified name
1911 (lacking @domain). Apply the same qualification processing as RCPT.
1913 JH/09 Bug 1804: Avoid writing msglog files when in -bh or -bhc mode.
1915 JH/10 Support ${sha256:} applied to a string (as well as the previous
1918 JH/11 Cutthrough: avoid using the callout hints db on a verify callout when
1919 a cutthrough deliver is pending, as we always want to make a connection.
1920 This also avoids re-routing the message when later placing the cutthrough
1921 connection after a verify cache hit.
1922 Do not update it with the verify result either.
1924 JH/12 Cutthrough: disable when verify option success_on_redirect is used, and
1925 when routing results in more than one destination address.
1927 JH/13 Cutthrough: expand transport dkim_domain option when testing for dkim
1928 signing (which inhibits the cutthrough capability). Previously only
1929 the presence of an option was tested; now an expansion evaluating as
1930 empty is permissible (obviously it should depend only on data available
1931 when the cutthrough connection is made).
1933 JH/14 Fix logging of errors under PIPELINING. Previously the log line giving
1934 the relevant preceding SMTP command did not note the pipelining mode.
1936 JH/15 Fix counting of empty lines in $body_linecount and $message_linecount.
1937 Previously they were not counted.
1939 JH/16 DANE: treat a TLSA lookup response having all non-TLSA RRs, the same
1940 as one having no matching records. Previously we deferred the message
1941 that needed the lookup.
1943 JH/17 Fakereject: previously logged as a normal message arrival "<="; now
1944 distinguished as "(=".
1946 JH/18 Bug 1867: make the fail_defer_domains option on a dnslookup router work
1947 for missing MX records. Previously it only worked for missing A records.
1949 JH/19 Bug 1850: support Radius libraries that return REJECT_RC.
1951 JH/20 Bug 1872: Ensure that acl_smtp_notquit is run when the connection drops
1952 after the data-go-ahead and data-ack. Patch from Jason Betts.
1954 JH/21 Bug 1846: Send DMARC forensic reports for reject and quarantine results,
1955 even for a "none" policy. Patch from Tony Meyer.
1957 JH/22 Fix continued use of a connection for further deliveries. If a port was
1958 specified by a router, it must also match for the delivery to be
1961 JH/23 Bug 1874: fix continued use of a connection for further deliveries.
1962 When one of the recipients of a message was unsuitable for the connection
1963 (has no matching addresses), we lost track of needing to mark it
1964 deferred. As a result mail would be lost.
1966 JH/24 Bug 1832: Log EHLO response on getting conn-close response for HELO.
1968 JH/25 Decoding ACL controls is now done using a binary search; the source code
1969 takes up less space and should be simpler to maintain. Merge the ACL
1970 condition decode tables also, with similar effect.
1972 JH/26 Fix problem with one_time used on a redirect router which returned the
1973 parent address unchanged. A retry would see the parent address marked as
1974 delivered, so not attempt the (identical) child. As a result mail would
1977 JH/27 Fix a possible security hole, wherein a process operating with the Exim
1978 UID can gain a root shell. Credit to http://www.halfdog.net/ for
1979 discovery and writeup. Ubuntu bug 1580454; no bug raised against Exim
1982 JH/28 Enable {spool,log} filesystem space and inode checks as default.
1983 Main config options check_{log,spool}_{inodes,space} are now
1984 100 inodes, 10MB unless set otherwise in the configuration.
1986 JH/29 Fix the connection_reject log selector to apply to the connect ACL.
1987 Previously it only applied to the main-section connection policy
1990 JH/30 Bug 1897: fix callouts connection fallback from TLS to cleartext.
1992 PP/01 Changed default Diffie-Hellman parameters to be Exim-specific, created
1993 by me. Added RFC7919 DH primes as an alternative.
1995 PP/02 Unbreak build via pkg-config with new hash support when crypto headers
1996 are not in the system include path.
1998 JH/31 Fix longstanding bug with aborted TLS server connection handling. Under
1999 GnuTLS, when a session startup failed (eg because the client disconnected)
2000 Exim did stdio operations after fclose. This was exposed by a recent
2001 change which nulled out the file handle after the fclose.
2003 JH/32 Bug 1909: Fix OCSP proof verification for cases where the proof is
2004 signed directly by the cert-signing cert, rather than an intermediate
2005 OCSP-signing cert. This is the model used by LetsEncrypt.
2007 JH/33 Bug 1914: Ensure socket is nonblocking before draining after SMTP QUIT.
2009 HS/01 Fix leak in verify callout under GnuTLS, about 3MB per recipient on
2010 an incoming connection.
2012 HS/02 Bug 1802: Do not half-close the connection after sending a request
2015 HS/03 Use "auto" as the default EC curve parameter. For OpenSSL < 1.0.2
2016 fallback to "prime256v1".
2018 JH/34 SECURITY: Use proper copy of DATA command in error message.
2019 Could leak key material. Remotely exploitable. CVE-2016-9963.
2025 JH/01 Bug 1664: Disable OCSP for GnuTLS library versions at/before 3.3.16
2026 and 3.4.4 - once the server is enabled to respond to an OCSP request
2027 it does even when not requested, resulting in a stapling non-aware
2028 client dropping the TLS connection.
2030 TF/01 Code cleanup: Overhaul the debug_selector and log_selector machinery to
2031 support variable-length bit vectors. No functional change.
2033 TF/02 Improve the consistency of logging incoming and outgoing interfaces.
2034 The I= interface field on outgoing lines is now after the H= remote
2035 host field, same as incoming lines. There is a separate
2036 outgoing_interface log selector which allows you to disable the
2039 JH/02 Bug 728: Close logfiles after a daemon-process "exceptional" log write.
2040 If not running log_selector +smtp_connection the mainlog would be held
2041 open indefinitely after a "too many connections" event, including to a
2042 deleted file after a log rotate. Leave the per net connection logging
2043 leaving it open for efficiency as that will be quickly detected by the
2044 check on the next write.
2046 HS/01 Bug 1671: Fix post transport crash.
2047 Processing the wait-<transport> messages could crash the delivery
2048 process if the message IDs didn't exist for some reason. When
2049 using 'split_spool_directory=yes' the construction of the spool
2050 file name failed already, exposing the same netto behaviour.
2052 JH/03 Bug 425: Capture substrings in $regex1, $regex2 etc from regex &
2053 mime_regex ACL conditions.
2055 JH/04 Bug 1686: When compiled with EXPERIMENTAL_DSN_INFO: Add extra information
2056 to DSN fail messages (bounces): remote IP, remote greeting, remote response
2057 to HELO, local diagnostic string.
2059 JH/05 Downgrade message for a TLS-certificate-based authentication fail from
2060 log line to debug. Even when configured with a tls authenticator many
2061 client connections are expected to not authenticate in this way, so
2062 an authenticate fail is not an error.
2064 HS/02 Add the Exim version string to the process info. This way exiwhat
2065 gives some more detail about the running daemon.
2067 JH/06 Bug 1395: time-limit caching of DNS lookups, to the TTL value. This may
2068 matter for fast-change records such as DNSBLs.
2070 JH/07 Bug 1678: Always record an interface option value, if set, as part of a
2071 retry record, even if constant. There may be multiple transports with
2072 different interface settings and the retry behaviour needs to be kept
2075 JH/08 Bug 1586: exiqgrep now refuses to run if there are unexpected arguments.
2077 JH/09 Bug 1700: ignore space & tab embedded in base64 during decode.
2079 JH/10 Bug 840: fix log_defer_output option of pipe transport
2081 JH/11 Bug 830: use same host for all RCPTS of a message, even under
2082 hosts_randomize. This matters a lot when combined with mua_wrapper.
2084 JH/12 Bug 1706: percent and underbar characters are no longer escaped by the
2085 ${quote_pgsql:<string>} operator.
2087 JH/13 Bug 1708: avoid misaligned access in cached lookup.
2089 JH/14 Change header file name for freeradius-client. Relevant if compiling
2090 with Radius support; from the Gentoo tree and checked under Fedora.
2092 JH/15 Bug 1712: Introduce $prdr_requested flag variable
2094 JH/16 Bug 1714: Permit an empty string as expansion result for transport
2095 option transport_filter, meaning no filtering.
2097 JH/17 Bug 1713: Fix non-PDKIM_DEBUG build. Patch from Jasen Betts.
2099 JH/18 Bug 1709: When built with TLS support, the tls_advertise_hosts option now
2100 defaults to "*" (all hosts). The variable is now available when not built
2101 with TLS, default unset, mainly to enable keeping the testsuite sane.
2102 If a server certificate is not supplied (via tls_certificate) an error is
2103 logged, and clients will find TLS connections fail on startup. Presumably
2104 they will retry in-clear.
2105 Packagers of Exim are strongly encouraged to create a server certificate
2106 at installation time.
2108 HS/03 Add -bP config_file as a synonym for -bP configure_file, for consistency
2109 with the $config_file variable.
2111 JH/19 Two additional event types: msg:rcpt:defer and msg:rcpt:host:defer. Both
2112 in transport context, after the attempt, and per-recipient. The latter type
2113 is per host attempted. The event data is the error message, and the errno
2114 information encodes the lookup type (A vs. MX) used for the (first) host,
2115 and the trailing two digits of the smtp 4xx response.
2117 GF/01 Bug 1715: Fix for race condition in exicyclog, where exim could attempt
2118 to write to mainlog (or rejectlog, paniclog) in the window between file
2119 creation and permissions/ownership being changed. Particularly affects
2120 installations where exicyclog is run as root, rather than exim user;
2121 result is that the running daemon panics and dies.
2123 JH/20 Bug 1701: For MySQL lookups, support MySQL config file option group names.
2125 JH/21 Bug 1720: Add support for priority groups and weighted-random proxy
2126 selection for the EXPERIMENTAL_SOCKS feature, via new per-proxy options
2127 "pri" and "weight". Note that the previous implicit priority given by the
2128 list order is no longer honoured.
2130 JH/22 Bugs 963, 1721: Fix some corner cases in message body canonicalization
2131 for DKIM processing.
2133 JH/23 Move SOCKS5 support from Experimental to mainline, enabled for a build
2134 by defining SUPPORT_SOCKS.
2136 JH/26 Move PROXY support from Experimental to mainline, enabled for a build
2137 by defining SUPPORT_PROXY. Note that the proxy_required_hosts option
2138 is renamed to hosts_proxy, and the proxy_{host,target}_{address,port}.
2139 variables are renamed to proxy_{local,external}_{address,port}.
2141 JH/27 Move Internationalisation support from Experimental to mainline, enabled
2142 for a build by defining SUPPORT_I18N
2144 JH/28 Bug 1745: Fix redis lookups to handle (quoted) spaces embedded in parts
2145 of the query string, and make ${quote_redis:} do that quoting.
2147 JH/29 Move Events support from Experimental to mainline, enabled by default
2148 and removable for a build by defining DISABLE_EVENT.
2150 JH/30 Updated DANE implementation code to current from Viktor Dukhovni.
2152 JH/31 Fix bug with hosts_connection_nolog and named-lists which were wrongly
2153 cached by the daemon.
2155 JH/32 Move Redis support from Experimental to mainline, enabled for a build
2156 by defining LOOKUP_REDIS. The libhiredis library is required.
2158 JH/33 Bug 1748: Permit ACL dnslists= condition in non-smtp ACLs if explicit
2159 keys are given for lookup.
2161 JH/34 Bug 1192: replace the embedded copy of PolarSSL RSA routines in the DKIM
2162 support, by using OpenSSL or GnuTLS library ones. This means DKIM is
2163 only supported when built with TLS support. The PolarSSL SHA routines
2164 are still used when the TLS library is too old for convenient support.
2166 JH/35 Require SINGLE_DH_USE by default in OpenSSL (main config option
2167 openssl_options), for security. OpenSSL forces this from version 1.1.0
2168 server-side so match that on older versions.
2170 JH/36 Bug 1778: longstanding bug in memory use by the ${run } expansion: A fresh
2171 allocation for $value could be released as the expansion processing
2172 concluded, but leaving the global pointer active for it.
2174 JH/37 Bug 1769: Permit a VRFY ACL to override the default 252 response,
2175 and to use the domains and local_parts ACL conditions.
2177 JH/38 Fix cutthrough bug with body lines having a single dot. The dot was
2178 incorrectly not doubled on cutthrough transmission, hence seen as a
2179 body-termination at the receiving system - resulting in truncated mails.
2180 Commonly the sender saw a TCP-level error, and retransmitted the message
2181 via the normal store-and-forward channel. This could result in duplicates
2182 received - but deduplicating mailstores were liable to retain only the
2183 initial truncated version.
2185 JH/39 Bug 1781: Fix use of DKIM private-keys having trailing '=' in the base-64.
2187 JH/40 Fix crash in queryprogram router when compiled with EXPERIMENTAL_SRS.
2189 JH/41 Bug 1792: Fix selection of headers to sign for DKIM: bottom-up. While
2190 we're in there, support oversigning also; bug 1309.
2192 JH/42 Bug 1796: Fix error logged on a malware scanner connection failure.
2194 HS/04 Add support for keep_environment and add_environment options.
2196 JH/43 Tidy coding issues detected by gcc --fsanitize=undefined. Some remain;
2197 either intentional arithmetic overflow during PRNG, or testing config-
2200 JH/44 Bug 1800: The combination of a -bhc commandline option and cutthrough
2201 delivery resulted in actual delivery. Cancel cutthrough before DATA
2204 JH/45 Fix cutthrough, when connection not opened by verify and target hard-
2205 rejects a recipient: pass the reject to the originator.
2207 JH/46 Multiple issues raised by Coverity. Some were obvious or plausible bugs.
2208 Many were false-positives and ignorable, but it's worth fixing the
2211 JH/47 Fix build on HP-UX and older Solaris, which need (un)setenv now also
2212 for the new environment-manipulation done at startup. Move the routines
2213 from being local to tls.c to being global via the os.c file.
2215 JH/48 Bug 1807: Fix ${extract } for the numeric/3-string case. While preparsing
2216 an extract embedded as result-arg for a map, the first arg for extract
2217 is unavailable so we cannot tell if this is a numbered or keyed
2218 extraction. Accept either.
2224 JH/01 Bug 1545: The smtp transport option "retry_include_ip_address" is now
2227 JH/02 The smtp transport option "multi_domain" is now expanded.
2229 JH/03 The smtp transport now requests PRDR by default, if the server offers
2232 JH/04 Certificate name checking on server certificates, when exim is a client,
2233 is now done by default. The transport option tls_verify_cert_hostnames
2234 can be used to disable this per-host. The build option
2235 EXPERIMENTAL_CERTNAMES is withdrawn.
2237 JH/05 The value of the tls_verify_certificates smtp transport and main options
2238 default to the word "system" to access the system default CA bundle.
2239 For GnuTLS, only version 3.0.20 or later.
2241 JH/06 Verification of the server certificate for a TLS connection is now tried
2242 (but not required) by default. The verification status is now logged by
2243 default, for both outbound TLS and client-certificate supplying inbound
2246 JH/07 Changed the default rfc1413 lookup settings to disable calls. Few
2249 JH/08 The EXPERIMENTAL_DSN compile option is no longer needed; all Delivery
2250 Status Notification (bounce) messages are now MIME format per RFC 3464.
2251 Support for RFC 3461 DSN options NOTIFY,ENVID,RET,ORCPT can be advertised
2252 under the control of the dsn_advertise_hosts option, and routers may
2253 have a dsn_lasthop option.
2255 JH/09 A timeout of 2 minutes is now applied to all malware scanner types by
2256 default, modifiable by a malware= option. The list separator for
2257 the options can now be changed in the usual way. Bug 68.
2259 JH/10 The smtp_receive_timeout main option is now expanded before use.
2261 JH/11 The incoming_interface log option now also enables logging of the
2262 local interface on delivery outgoing connections.
2264 JH/12 The cutthrough-routing facility now supports multi-recipient mails,
2265 if the interface and destination host and port all match.
2267 JH/13 Bug 344: The verify = reverse_host_lookup ACL condition now accepts a
2270 JH/14 Bug 1573: The spam= ACL condition now additionally supports Rspamd.
2271 Patch from Andrew Lewis.
2273 JH/15 Bug 670: The spamd_address main option (for the spam= ACL condition)
2274 now supports optional time-restrictions, weighting, and priority
2275 modifiers per server. Patch originally by <rommer@active.by>.
2277 JH/16 The spamd_address main option now supports a mixed list of local
2278 and remote servers. Remote servers can be IPv6 addresses, and
2279 specify a port-range.
2281 JH/17 Bug 68: The spamd_address main option now supports an optional
2282 timeout value per server.
2284 JH/18 Bug 1581: Router and transport options headers_add/remove can
2285 now have the list separator specified.
2287 JH/19 Bug 392: spamd_address, and clamd av_scanner, now support retry
2290 JH/20 Bug 1571: Ensure that $tls_in_peerdn is set, when verification fails
2293 JH/21 Support for the A6 type of dns record is withdrawn.
2295 JH/22 Bug 608: The result of a QUIT or not-QUIT toplevel ACL now matters
2296 rather than the verbs used.
2298 JH/23 Bug 1572: Increase limit on SMTP confirmation message copy size
2299 from 255 to 1024 chars.
2301 JH/24 Verification callouts now attempt to use TLS by default.
2303 HS/01 DNSSEC options (dnssec_require_domains, dnssec_request_domains)
2304 are generic router options now. The defaults didn't change.
2306 JH/25 Bug 466: Add RFC2322 support for MIME attachment filenames.
2307 Original patch from Alexander Shikoff, worked over by JH.
2309 HS/02 Bug 1575: exigrep falls back to autodetection of compressed
2310 files if ZCAT_COMMAND is not executable.
2312 JH/26 Bug 1539: Add timeout/retry options on dnsdb lookups.
2314 JH/27 Bug 286: Support SOA lookup in dnsdb lookups.
2316 JH/28 Bug 1588: Do not use the A lookup following an AAAA for setting the FQDN.
2317 Normally benign, it bites when the pair was led to by a CNAME;
2318 modern usage is to not canonicalize the domain to a CNAME target
2319 (and we were inconsistent anyway for A-only vs AAAA+A).
2321 JH/29 Bug 1632: Removed the word "rejected" from line logged for ACL discards.
2323 JH/30 Check the forward DNS lookup for DNSSEC, in addition to the reverse,
2324 when evaluating $sender_host_dnssec.
2326 JH/31 Check the HELO verification lookup for DNSSEC, adding new
2327 $sender_helo_dnssec variable.
2329 JH/32 Bug 1397: Enable ECDHE on OpenSSL, just the NIST P-256 curve.
2331 JH/33 Bug 1346: Note MAIL cmd seen in -bS batch, to avoid smtp_no_mail log.
2333 JH/34 Bug 1648: Fix a memory leak seen with "mailq" and large queues.
2335 JH/35 Bug 1642: Fix support of $spam_ variables at delivery time. Was
2336 documented as working, but never had. Support all but $spam_report.
2338 JH/36 Bug 1659: Guard checking of input smtp commands again pseudo-command
2339 added for tls authenticator.
2341 HS/03 Add perl_taintmode main config option
2347 TL/01 When running the test suite, the README says that variables such as
2348 no_msglog_check are global and can be placed anywhere in a specific
2349 test's script, however it was observed that placement needed to be near
2350 the beginning for it to behave that way. Changed the runtest perl
2351 script to read through the entire script once to detect and set these
2352 variables, reset to the beginning of the script, and then run through
2353 the script parsing/test process like normal.
2355 TL/02 The BSD's have an arc4random API. One of the functions to induce
2356 adding randomness was arc4random_stir(), but it has been removed in
2357 OpenBSD 5.5. Detect this OpenBSD version and skip calling this
2358 function when detected.
2360 JH/01 Expand the EXPERIMENTAL_TPDA feature. Several different events now
2361 cause callback expansion.
2363 TL/03 Bugzilla 1518: Clarify "condition" processing in routers; that
2364 syntax errors in an expansion can be treated as a string instead of
2365 logging or causing an error, due to the internal use of bool_lax
2366 instead of bool when processing it.
2368 JH/02 Add EXPERIMENTAL_DANE, allowing for using the DNS as trust-anchor for
2369 server certificates when making smtp deliveries.
2371 JH/03 Support secondary-separator specifier for MX, SRV, TLSA lookups.
2373 JH/04 Add ${sort {list}{condition}{extractor}} expansion item.
2375 TL/04 Bugzilla 1216: Add -M (related messages) option to exigrep.
2377 TL/05 GitHub Issue 18: Adjust logic testing for true/false in redis lookups.
2378 Merged patch from Sebastian Wiedenroth.
2380 JH/05 Fix results-pipe from transport process. Several recipients, combined
2381 with certificate use, exposed issues where response data items split
2382 over buffer boundaries were not parsed properly. This eventually
2383 resulted in duplicates being sent. This issue only became common enough
2384 to notice due to the introduction of connection certificate information,
2385 the item size being so much larger. Found and fixed by Wolfgang Breyha.
2387 JH/06 Bug 1533: Fix truncation of items in headers_remove lists. A fixed
2388 size buffer was used, resulting in syntax errors when an expansion
2391 JH/07 Add support for directories of certificates when compiled with a GnuTLS
2392 version 3.3.6 or later.
2394 JH/08 Rename the TPDA experimental facility to Event Actions. The #ifdef
2395 is EXPERIMENTAL_EVENT, the main-configuration and transport options
2396 both become "event_action", the variables become $event_name, $event_data
2397 and $event_defer_errno. There is a new variable $verify_mode, usable in
2398 routers, transports and related events. The tls:cert event is now also
2399 raised for inbound connections, if the main configuration event_action
2402 TL/06 In test suite, disable OCSP for old versions of openssl which contained
2403 early OCSP support, but no stapling (appears to be less than 1.0.0).
2405 JH/09 When compiled with OpenSSL and EXPERIMENTAL_CERTNAMES, the checks on
2406 server certificate names available under the smtp transport option
2407 "tls_verify_cert_hostname" now do not permit multi-component wildcard
2410 JH/10 Time-related extraction expansions from certificates now use the main
2411 option "timezone" setting for output formatting, and are consistent
2412 between OpenSSL and GnuTLS compilations. Bug 1541.
2414 JH/11 Fix a crash in mime ACL when meeting a zero-length, quoted or RFC2047-
2415 encoded parameter in the incoming message. Bug 1558.
2417 JH/12 Bug 1527: Autogrow buffer used in reading spool files. Since they now
2418 include certificate info, eximon was claiming there were spoolfile
2421 JH/13 Bug 1521: Fix ldap lookup for single-attr request, multiple-attr return.
2423 JH/14 Log delivery-related information more consistently, using the sequence
2424 "H=<name> [<ip>]" wherever possible.
2426 TL/07 Bug 1547: Omit RFCs from release. Draft and RFCs have licenses which
2427 are problematic for Debian distribution, omit them from the release
2430 JH/15 Updates and fixes to the EXPERIMENTAL_DSN feature.
2432 JH/16 Fix string representation of time values on 64bit time_t architectures.
2435 JH/17 Fix a null-indirection in certextract expansions when a nondefault
2436 output list separator was used.
2441 TL/01 Bugzilla 1506: Re-add a 'return NULL' to silence complaints from static
2442 checkers that were complaining about end of non-void function with no
2445 JH/01 Bug 1513: Fix parsing of quoted parameter values in MIME headers.
2446 This was a regression introduced in 4.83 by another bugfix.
2448 JH/02 Fix broken compilation when EXPERIMENTAL_DSN is enabled.
2450 TL/02 Bug 1509: Fix exipick for enhanced spoolfile specification used when
2451 EXPERIMENTAL_DSN is enabled. Fix from Wolfgang Breyha.
2457 TF/01 Correctly close the server side of TLS when forking for delivery.
2459 When a message was received over SMTP with TLS, Exim failed to clear up
2460 the incoming connection properly after forking off the child process to
2461 deliver the message. In some situations the subsequent outgoing
2462 delivery connection happened to have the same fd number as the incoming
2463 connection previously had. Exim would try to use TLS and fail, logging
2464 a "Bad file descriptor" error.
2466 TF/02 Portability fix for building lookup modules on Solaris when the xpg4
2467 utilities have not been installed.
2469 JH/01 Fix memory-handling in use of acl as a conditional; avoid free of
2470 temporary space as the ACL may create new global variables.
2472 TL/01 LDAP support uses per connection or global context settings, depending
2473 upon the detected version of the libraries at build time.
2475 TL/02 Experimental Proxy Protocol support: allows a proxied SMTP connection
2476 to extract and use the src ip:port in logging and expansions as if it
2477 were a direct connection from the outside internet. PPv2 support was
2478 updated based on HAProxy spec change in May 2014.
2480 JH/02 Add ${listextract {number}{list}{success}{fail}}.
2482 TL/03 Bugzilla 1433: Fix DMARC SEGV with specific From header contents.
2483 Properly escape header and check for NULL return.
2485 PP/01 Continue incomplete 4.82 PP/19 by fixing docs too: use dns_dnssec_ok
2488 JH/03 Bugzilla 1157: support log_selector smtp_confirmation for lmtp.
2490 TL/04 Add verify = header_names_ascii check to reject email with non-ASCII
2491 characters in header names, implemented as a verify condition.
2492 Contributed by Michael Fischer v. Mollard.
2494 TL/05 Rename SPF condition results err_perm and err_temp to standardized
2495 results permerror and temperror. Previous values are deprecated but
2496 still accepted. In a future release, err_perm and err_temp will be
2497 completely removed, which will be a backward incompatibility if the
2498 ACL tests for either of these two old results. Patch contributed by
2499 user bes-internal on the mailing list.
2501 JH/04 Add ${utf8clean:} operator. Contributed by Alex Rau.
2503 JH/05 Bugzilla 305: Log incoming-TLS details on rejects, subject to log
2504 selectors, in both main and reject logs.
2506 JH/06 Log outbound-TLS and port details, subject to log selectors, for a
2509 JH/07 Add malware type "sock" for talking to simple daemon.
2511 JH/08 Bugzilla 1371: Add tls_{,try_}verify_hosts to smtp transport.
2513 JH/09 Bugzilla 1431: Support (with limitations) headers_add/headers_remove in
2514 routers/transports under cutthrough routing.
2516 JH/10 Bugzilla 1005: ACL "condition =" should accept values which are negative
2517 numbers. Touch up "bool" conditional to keep the same definition.
2519 TL/06 Remove duplicated language in spec file from 4.82 TL/16.
2521 JH/11 Add dnsdb tlsa lookup. From Todd Lyons.
2523 JH/12 Expand items in router/transport headers_add or headers_remove lists
2524 individually rather than the list as a whole. Bug 1452.
2526 Required for reasonable handling of multiple headers_ options when
2527 they may be empty; requires that headers_remove items with embedded
2528 colons must have them doubled (or the list-separator changed).
2530 TL/07 Add new dmarc expansion variable $dmarc_domain_policy to directly
2531 view the policy declared in the DMARC record. Currently, $dmarc_status
2532 is a combined value of both the record presence and the result of the
2535 JH/13 Fix handling of $tls_cipher et.al. in (non-verify) transport. Bug 1455.
2537 JH/14 New options dnssec_request_domains, dnssec_require_domains on the
2538 dnslookup router and the smtp transport (applying to the forward
2541 TL/08 Bugzilla 1453: New LDAP "SERVERS=" option allows admin to override list
2542 of ldap servers used for a specific lookup. Patch provided by Heiko
2545 JH/18 New options dnssec_lax, dnssec_strict on dnsdb lookups.
2546 New variable $lookup_dnssec_authenticated for observability.
2548 TL/09 Bugzilla 609: Add -C option to exiqgrep, specify which exim.conf to use.
2549 Patch submitted by Lars Timman.
2551 JH/19 EXPERIMENTAL_OCSP support under GnuTLS. Bug 1459.
2553 TL/10 Bugzilla 1454: New -oMm option to pass message reference to Exim.
2554 Requires trusted mode and valid format message id, aborts otherwise.
2555 Patch contributed by Heiko Schlichting.
2557 JH/20 New expansion variables tls_(in,out)_(our,peer)cert, and expansion item
2558 certextract with support for various fields. Bug 1358.
2560 JH/21 Observability of OCSP via variables tls_(in,out)_ocsp. Stapling
2561 is requested by default, modifiable by smtp transport option
2564 JH/22 Expansion operators ${md5:string} and ${sha1:string} can now
2565 operate on certificate variables to give certificate fingerprints
2566 Also new ${sha256:cert_variable}.
2568 JH/23 The PRDR feature is moved from being Experimental into the mainline.
2570 TL/11 Bug 1119: fix memory allocation in string_printing2(). Patch from
2571 Christian Aistleitner.
2573 JH/24 The OCSP stapling feature is moved from Experimental into the mainline.
2575 TL/12 Bug 1444: Fix improper \r\n sequence handling when writing spool
2576 file. Patch from Wolfgang Breyha.
2578 JH/25 Expand the coverage of the delivery $host and $host_address to
2579 client authenticators run in verify callout. Bug 1476.
2581 JH/26 Port service names are now accepted for tls_on_connect_ports, to
2582 align with daemon_smtp_ports. Bug 72.
2584 TF/03 Fix udpsend. The ip_connectedsocket() function's socket type
2585 support and error reporting did not work properly.
2587 TL/13 Bug 1495: Exiqgrep check if -C config file specified on cli exists
2588 and is readable. Patch from Andrew Colin Kissa.
2590 TL/14 Enhance documentation of ${run expansion and how it parses the
2591 commandline after expansion, particularly in the case when an
2592 unquoted variable expansion results in an empty value.
2594 JH/27 The TLS SNI feature was broken in 4.82. Fix it.
2596 PP/02 Fix internal collision of T_APL on systems which support RFC3123
2597 by renaming away from it. Addresses GH issue 15, reported by
2600 JH/28 Fix parsing of MIME headers for parameters with quoted semicolons.
2602 TL/15 SECURITY: prevent double expansion in math comparison functions
2603 (can expand unsanitized data). Not remotely exploitable.
2610 PP/01 Add -bI: framework, and -bI:sieve for querying sieve capabilities.
2612 PP/02 Make -n do something, by making it not do something.
2613 When combined with -bP, the name of an option is not output.
2615 PP/03 Added tls_dh_min_bits SMTP transport driver option, only honoured
2618 PP/04 First step towards DNSSEC, provide $sender_host_dnssec for
2619 $sender_host_name and config options to manage this, and basic check
2622 PP/05 DSCP support for outbound connections and control modifier for inbound.
2624 PP/06 Cyrus SASL: set local and remote IP;port properties for driver.
2625 (Only plugin which currently uses this is kerberos4, which nobody should
2626 be using, but we should make it available and other future plugins might
2627 conceivably use it, even though it would break NAT; stuff *should* be
2628 using channel bindings instead).
2630 PP/07 Handle "exim -L <tag>" to indicate to use syslog with tag as the process
2631 name; added for Sendmail compatibility; requires admin caller.
2632 Handle -G as equivalent to "control = suppress_local_fixups" (we used to
2633 just ignore it); requires trusted caller.
2634 Also parse but ignore: -Ac -Am -X<logfile>
2637 TL/01 Bugzilla 1258 - Refactor MAIL FROM optional args processing.
2639 TL/02 Add +smtp_confirmation as a default logging option.
2641 TL/03 Bugzilla 198 - Implement remove_header ACL modifier.
2642 Patch by Magnus Holmgren from 2007-02-20.
2644 TL/04 Bugzilla 1281 - Spec typo.
2645 Bugzilla 1283 - Spec typo.
2646 Bugzilla 1290 - Spec grammar fixes.
2648 TL/05 Bugzilla 1285 - Spec omission, fix docbook errors for spec.txt creation.
2650 TL/06 Add Experimental DMARC support using libopendmarc libraries.
2652 TL/07 Fix an out of order global option causing a segfault. Reported to dev
2653 mailing list by by Dmitry Isaikin.
2655 JH/01 Bugzilla 1201 & 304 - New cutthrough-delivery feature, with TLS support.
2657 JH/02 Support "G" suffix to numbers in ${if comparisons.
2659 PP/08 Handle smtp transport tls_sni option forced-fail for OpenSSL.
2661 NM/01 Bugzilla 1197 - Spec typo
2662 Bugzilla 1196 - Spec examples corrections
2664 JH/03 Add expansion operators ${listnamed:name} and ${listcount:string}
2666 PP/09 Add gnutls_allow_auto_pkcs11 option (was originally called
2667 gnutls_enable_pkcs11, but renamed to more accurately indicate its
2670 PP/10 Let Linux makefile inherit CFLAGS/CFLAGS_DYNAMIC.
2671 Pulled from Debian 30_dontoverridecflags.dpatch by Andreas Metzler.
2673 JH/04 Add expansion item ${acl {name}{arg}...}, expansion condition
2674 "acl {{name}{arg}...}", and optional args on acl condition
2677 JH/05 Permit multiple router/transport headers_add/remove lines.
2679 JH/06 Add dnsdb pseudo-lookup "a+" to do an "aaaa" + "a" combination.
2681 JH/07 Avoid using a waiting database for a single-message-only transport.
2682 Performance patch from Paul Fisher. Bugzilla 1262.
2684 JH/08 Strip leading/trailing newlines from add_header ACL modifier data.
2687 JH/09 Add $headers_added variable, with content from use of ACL modifier
2688 add_header (but not yet added to the message). Bugzilla 199.
2690 JH/10 Add 8bitmime log_selector, for 8bitmime status on the received line.
2691 Pulled from Bugzilla 817 by Wolfgang Breyha.
2693 PP/11 SECURITY: protect DKIM DNS decoding from remote exploit.
2695 (nb: this is the same fix as in Exim 4.80.1)
2697 JH/11 Add A= logging on delivery lines, and a client_set_id option on
2700 JH/12 Add optional authenticated_sender logging to A= and a log_selector
2703 PP/12 Unbreak server_set_id for NTLM/SPA auth, broken by 4.80 PP/29.
2705 PP/13 Dovecot auth: log better reason to rejectlog if Dovecot did not
2706 advertise SMTP AUTH mechanism to us, instead of a generic
2707 protocol violation error. Also, make Exim more robust to bad
2708 data from the Dovecot auth socket.
2710 TF/01 Fix ultimate retry timeouts for intermittently deliverable recipients.
2712 When a queue runner is handling a message, Exim first routes the
2713 recipient addresses, during which it prunes them based on the retry
2714 hints database. After that it attempts to deliver the message to
2715 any remaining recipients. It then updates the hints database using
2718 So if a recipient address works intermittently, it can get repeatedly
2719 deferred at routing time. The retry hints record remains fresh so the
2720 address never reaches the final cutoff time.
2722 This is a fairly common occurrence when a user is bumping up against
2723 their storage quota. Exim had some logic in its local delivery code
2724 to deal with this. However it did not apply to per-recipient defers
2725 in remote deliveries, e.g. over LMTP to a separate IMAP message store.
2727 This change adds a proper retry rule check during routing so that the
2728 final cutoff time is checked against the message's age. We only do
2729 this check if there is an address retry record and there is not a
2730 domain retry record; this implies that previous attempts to handle
2731 the address had the retry_use_local_parts option turned on. We use
2732 this as an approximation for the destination being like a local
2733 delivery, as in LMTP.
2735 I suspect this new check makes the old local delivery cutoff check
2736 redundant, but I have not verified this so I left the code in place.
2738 TF/02 Correct gecos expansion when From: is a prefix of the username.
2740 Test 0254 submits a message to Exim with the header
2744 When I ran the test suite under the user fanf2, Exim expanded
2745 the header to contain my full name, whereas it should have added
2746 a Resent-Sender: header. It erroneously treats any prefix of the
2747 username as equal to the username.
2749 This change corrects that bug.
2751 GF/01 DCC debug and logging tidyup
2752 Error conditions log to paniclog rather than rejectlog.
2753 Debug lines prefixed by "DCC: " to remove any ambiguity.
2755 TF/03 Avoid unnecessary rebuilds of lookup-related code.
2757 PP/14 Fix OCSP reinitialisation in SNI handling for Exim/TLS as server.
2758 Bug spotted by Jeremy Harris; was flawed since initial commit.
2759 Would have resulted in OCSP responses post-SNI triggering an Exim
2760 NULL dereference and crash.
2762 JH/13 Add $router_name and $transport_name variables. Bugzilla 308.
2764 PP/15 Define SIOCGIFCONF_GIVES_ADDR for GNU Hurd.
2765 Bug detection, analysis and fix by Samuel Thibault.
2766 Bugzilla 1331, Debian bug #698092.
2768 SC/01 Update eximstats to watch out for senders sending 'HELO [IpAddr]'
2770 JH/14 SMTP PRDR (http://www.eric-a-hall.com/specs/draft-hall-prdr-00.txt).
2771 Server implementation by Todd Lyons, client by JH.
2772 Only enabled when compiled with EXPERIMENTAL_PRDR. A new
2773 config variable "prdr_enable" controls whether the server
2774 advertises the facility. If the client requests PRDR a new
2775 acl_data_smtp_prdr ACL is called once for each recipient, after
2776 the body content is received and before the acl_smtp_data ACL.
2777 The client is controlled by both of: a hosts_try_prdr option
2778 on the smtp transport, and the server advertisement.
2779 Default client logging of deliveries and rejections involving
2780 PRDR are flagged with the string "PRDR".
2782 PP/16 Fix problems caused by timeouts during quit ACLs trying to double
2783 fclose(). Diagnosis by Todd Lyons.
2785 PP/17 Update configure.default to handle IPv6 localhost better.
2786 Patch by Alain Williams (plus minor tweaks).
2789 PP/18 OpenSSL made graceful with empty tls_verify_certificates setting.
2790 This is now consistent with GnuTLS, and is now documented: the
2791 previous undocumented portable approach to treating the option as
2792 unset was to force an expansion failure. That still works, and
2793 an empty string is now equivalent.
2795 PP/19 Renamed DNSSEC-enabling option to "dns_dnssec_ok", to make it
2796 clearer that Exim is using the DO (DNSSEC OK) EDNS0 resolver flag,
2797 not performing validation itself.
2799 PP/20 Added force_command boolean option to pipe transport.
2800 Patch from Nick Koston, of cPanel Inc.
2802 JH/15 AUTH support on callouts (and hence cutthrough-deliveries).
2805 TF/04 Added udpsend ACL modifier and hexquote expansion operator
2807 PP/21 Fix eximon continuous updating with timestamped log-files.
2808 Broken in a format-string cleanup in 4.80, missed when I repaired the
2809 other false fix of the same issue.
2810 Report and fix from Heiko Schlichting.
2813 PP/22 Guard LDAP TLS usage against Solaris LDAP variant.
2814 Report from Prashanth Katuri.
2816 PP/23 Support safari_ecdhe_ecdsa_bug for openssl_options.
2817 It's SecureTransport, so affects any MacOS clients which use the
2818 system-integrated TLS libraries, including email clients.
2820 PP/24 Fix segfault from trying to fprintf() to a NULL stdio FILE* if
2821 using a MIME ACL for non-SMTP local injection.
2822 Report and assistance in diagnosis by Warren Baker.
2824 TL/08 Adjust exiqgrep to be case-insensitive for sender/receiver.
2826 JH/16 Fix comparisons for 64b. Bugzilla 1385.
2828 TL/09 Add expansion variable $authenticated_fail_id to keep track of
2829 last id that failed so it may be referenced in subsequent ACL's.
2831 TL/10 Bugzilla 1375 - Prevent TLS rebinding in ldap. Patch provided by
2834 TL/11 Bugzilla 1382 - Option ldap_require_cert overrides start_tls
2835 ldap library initialization, allowing self-signed CA's to be
2836 used. Also properly sets require_cert option later in code by
2837 using NULL (global ldap config) instead of ldap handle (per
2838 session). Bug diagnosis and testing by alxgomz.
2840 TL/12 Enhanced documentation in the ratelimit.pl script provided in
2841 the src/util/ subdirectory.
2843 TL/13 Bug 1031 - Imported transport SQL logging patch from Axel Rau
2844 renamed to Transport Post Delivery Action by Jeremy Harris, as
2847 TL/14 Bugzilla 1217 - Redis lookup support has been added. It is only enabled
2848 when Exim is compiled with EXPERIMENTAL_REDIS. A new config variable
2849 redis_servers = needs to be configured which will be used by the redis
2850 lookup. Patch from Warren Baker, of The Packet Hub.
2852 TL/15 Fix exiqsumm summary for corner case. Patch provided by Richard Hall.
2854 TL/16 Bugzilla 1289 - Clarify host/ip processing when have errors looking up a
2855 hostname or reverse DNS when processing a host list. Used suggestions
2856 from multiple comments on this bug.
2858 TL/17 Bugzilla 1057 - Multiple clamd TCP targets patch from Mark Zealey.
2860 TL/18 Had previously added a -CONTINUE option to runtest in the test suite.
2861 Missed a few lines, added it to make the runtest require no keyboard
2864 TL/19 Bugzilla 1402 - Test 533 fails if any part of the path to the test suite
2865 contains upper case chars. Make router use caseful_local_part.
2867 TL/20 Bugzilla 1400 - Add AVOID_GNUTLS_PKCS11 build option. Allows GnuTLS
2868 support when GnuTLS has been built with p11-kit.
2874 PP/01 SECURITY: protect DKIM DNS decoding from remote exploit.
2876 This, or similar/improved, will also be change PP/11 of 4.82.
2882 PP/01 Handle short writes when writing local log-files.
2883 In practice, only affects FreeBSD (8 onwards).
2884 Bugzilla 1053, with thanks to Dmitry Isaikin.
2886 NM/01 Bugzilla 949 - Documentation tweak
2888 NM/02 Bugzilla 1093 - eximstats DATA reject detection regexps
2891 NM/03 Bugzilla 1169 - primary_hostname spelling was incorrect in docs.
2893 PP/02 Implemented gsasl authenticator.
2895 PP/03 Implemented heimdal_gssapi authenticator with "server_keytab" option.
2897 PP/04 Local/Makefile support for (AUTH|LOOKUP)_*_PC=foo to use
2898 `pkg-config foo` for cflags/libs.
2900 PP/05 Swapped $auth1/$auth2 for gsasl GSSAPI mechanism, to be more consistent
2901 with rest of GSASL and with heimdal_gssapi.
2903 PP/06 Local/Makefile support for USE_(GNUTLS|OPENSSL)_PC=foo to use
2904 `pkg-config foo` for cflags/libs for the TLS implementation.
2906 PP/07 New expansion variable $tls_bits; Cyrus SASL server connection
2907 properties get this fed in as external SSF. A number of robustness
2908 and debugging improvements to the cyrus_sasl authenticator.
2910 PP/08 cyrus_sasl server now expands the server_realm option.
2912 PP/09 Bugzilla 1214 - Log authentication information in reject log.
2913 Patch by Jeremy Harris.
2915 PP/10 Added dbmjz lookup type.
2917 PP/11 Let heimdal_gssapi authenticator take a SASL message without an authzid.
2919 PP/12 MAIL args handles TAB as well as SP, for better interop with
2920 non-compliant senders.
2921 Analysis and variant patch by Todd Lyons.
2923 NM/04 Bugzilla 1237 - fix cases where printf format usage not indicated
2924 Bug report from Lars Müller <lars@samba.org> (via SUSE),
2925 Patch from Dirk Mueller <dmueller@suse.com>
2927 PP/13 tls_peerdn now print-escaped for spool files.
2928 Observed some $tls_peerdn in wild which contained \n, which resulted
2929 in spool file corruption.
2931 PP/14 TLS fixes for OpenSSL: support TLS 1.1 & 1.2; new "openssl_options"
2932 values; set SSL_MODE_AUTO_RETRY so that OpenSSL will retry a read
2933 or write after TLS renegotiation, which otherwise led to messages
2936 TK/01 Bugzilla 1239 - fix DKIM verification when signature was not inserted
2937 as a tracking header (ie: a signed header comes before the signature).
2938 Patch from Wolfgang Breyha.
2940 JH/01 Bugzilla 660 - Multi-valued attributes from ldap now parseable as a
2941 comma-sep list; embedded commas doubled.
2943 JH/02 Refactored ACL "verify =" logic to table-driven dispatch.
2945 PP/15 LDAP: Check for errors of TLS initialisation, to give correct
2947 Report and patch from Dmitry Banschikov.
2949 PP/16 Removed "dont_insert_empty_fragments" from "openssl_options".
2950 Removed SSL_clear() after SSL_new() which led to protocol negotiation
2951 failures. We appear to now support TLS1.1+ with Exim.
2953 PP/17 OpenSSL: new expansion var $tls_sni, which if used in tls_certificate
2954 lets Exim select keys and certificates based upon TLS SNI from client.
2955 Also option tls_sni on SMTP Transports. Also clear $tls_bits correctly
2956 before an outbound SMTP session. New log_selector, +tls_sni.
2958 PP/18 Bugzilla 1122 - check localhost_number expansion for failure, avoid
2959 NULL dereference. Report and patch from Alun Jones.
2961 PP/19 DNS resolver init changes for NetBSD compatibility. (Risk of breakage
2962 on less well tested platforms). Obviates NetBSD pkgsrc patch-ac.
2963 Not seeing resolver debug output on NetBSD, but suspect this is a
2964 resolver implementation change.
2966 PP/20 Revert part of NM/04, it broke log_path containing %D expansions.
2967 Left warnings. Added "eximon gdb" invocation mode.
2969 PP/21 Defaulting "accept_8bitmime" to true, not false.
2971 PP/22 Added -bw for inetd wait mode support.
2973 PP/23 Added PCRE_CONFIG=yes support to Makefile for using pcre-config to
2974 locate the relevant includes and libraries. Made this the default.
2976 PP/24 Fixed headers_only on smtp transports (was not sending trailing dot).
2977 Bugzilla 1246, report and most of solution from Tomasz Kusy.
2979 JH/03 ${eval } now uses 64-bit and supports a "g" suffix (like to "k" and "m").
2980 This may cause build issues on older platforms.
2982 PP/25 Revamped GnuTLS support, passing tls_require_ciphers to
2983 gnutls_priority_init, ignoring Exim options gnutls_require_kx,
2984 gnutls_require_mac & gnutls_require_protocols (no longer supported).
2985 Added SNI support via GnuTLS too.
2986 Made ${randint:..} supplier available, if using not-too-old GnuTLS.
2988 PP/26 Added EXPERIMENTAL_OCSP for OpenSSL.
2990 PP/27 Applied dnsdb SPF support patch from Janne Snabb.
2991 Applied second patch from Janne, implementing suggestion to default
2992 multiple-strings-in-record handling to match SPF spec.
2994 JH/04 Added expansion variable $tod_epoch_l for a higher-precision time.
2996 PP/28 Fix DCC dcc_header content corruption (stack memory referenced,
2997 read-only, out of scope).
2998 Patch from Wolfgang Breyha, report from Stuart Northfield.
3000 PP/29 Fix three issues highlighted by clang analyser static analysis.
3001 Only crash-plausible issue would require the Cambridge-specific
3002 iplookup router and a misconfiguration.
3003 Report from Marcin Mirosław.
3005 PP/30 Another attempt to deal with PCRE_PRERELEASE, this one less buggy.
3007 PP/31 %D in printf continues to cause issues (-Wformat=security), so for
3008 now guard some of the printf checks behind WANT_DEEPER_PRINTF_CHECKS.
3009 As part of this, removing so much warning spew let me fix some minor
3010 real issues in debug logging.
3012 PP/32 GnuTLS was always using default tls_require_ciphers, due to a missing
3013 assignment on my part. Fixed.
3015 PP/33 Added tls_dh_max_bits option, defaulting to current hard-coded limit
3016 of NSS, for GnuTLS/NSS interop. Problem root cause diagnosis by
3017 Janne Snabb (who went above and beyond: thank you).
3019 PP/34 Validate tls_require_ciphers on startup, since debugging an invalid
3020 string otherwise requires a connection and a bunch more work and it's
3021 relatively easy to get wrong. Should also expose TLS library linkage
3024 PP/35 Pull in <features.h> on Linux, for some portability edge-cases of
3025 64-bit ${eval} (JH/03).
3027 PP/36 Define _GNU_SOURCE in exim.h; it's needed for some releases of
3028 GNU libc to support some of the 64-bit stuff, should not lead to
3029 conflicts. Defined before os.h is pulled in, so if a given platform
3030 needs to override this, it can.
3032 PP/37 Unbreak Cyrus SASL auth: SSF retrieval was incorrect, Exim thought
3033 protection layer was required, which is not implemented.
3034 Bugzilla 1254, patch from Wolfgang Breyha.
3036 PP/38 Overhaul DH prime handling, supply RFC-specified DH primes as built
3037 into Exim, default to IKE id 23 from RFC 5114 (2048 bit). Make
3038 tls_dhparam take prime identifiers. Also unbreak combination of
3039 OpenSSL+DH_params+TLSSNI.
3041 PP/39 Disable SSLv2 by default in OpenSSL support.
3047 PP/01 Solaris build fix for Oracle's LDAP libraries.
3048 Bugzilla 1109, patch from Stephen Usher.
3050 TF/01 HP/UX build fix: avoid arithmetic on a void pointer.
3052 TK/01 DKIM Verification: Fix relaxed canon for empty headers w/o
3055 TF/02 Fix a couple more cases where we did not log the error message
3056 when unlink() failed. See also change 4.74-TF/03.
3058 TF/03 Make the exiwhat support code safe for signals. Previously Exim might
3059 lock up or crash if it happened to be inside a call to libc when it
3060 got a SIGUSR1 from exiwhat.
3062 The SIGUSR1 handler appends the current process status to the process
3063 log which is later printed by exiwhat. It used to use the general
3064 purpose logging code to do this, but several functions it calls are
3065 not safe for signals.
3067 The new output code in the SIGUSR1 handler is specific to the process
3068 log, and simple enough that it's easy to inspect for signal safety.
3069 Removing some special cases also simplifies the general logging code.
3070 Removing the spurious timestamps from the process log simplifies
3073 TF/04 Improved ratelimit ACL condition.
3075 The /noupdate option has been deprecated in favour of /readonly which
3076 has clearer semantics. The /leaky, /strict, and /readonly update modes
3077 are mutually exclusive. The update mode is no longer included in the
3078 database key; it just determines when the database is updated. (This
3079 means that when you upgrade Exim will forget old rate measurements.)
3081 Exim now checks that the per_* options are used with an update mode that
3082 makes sense for the current ACL. For example, when Exim is processing a
3083 message (e.g. acl_smtp_rcpt or acl_smtp_data, etc.) you can specify
3084 per_mail/leaky or per_mail/strict; otherwise (e.g. in acl_smtp_helo) you
3085 must specify per_mail/readonly. If you omit the update mode it defaults to
3086 /leaky where that makes sense (as before) or /readonly where required.
3088 The /noupdate option is now undocumented but still supported for
3089 backwards compatibility. It is equivalent to /readonly except that in
3090 ACLs where /readonly is required you may specify /leaky/noupdate or
3091 /strict/noupdate which are treated the same as /readonly.
3093 A useful new feature is the /count= option. This is a generalization
3094 of the per_byte option, so that you can measure the throughput of other
3095 aggregate values. For example, the per_byte option is now equivalent
3096 to per_mail/count=${if >{0}{$message_size} {0} {$message_size} }.
3098 The per_rcpt option has been generalized using the /count= mechanism
3099 (though it's more complicated than the per_byte equivalence). When it is
3100 used in acl_smtp_rcpt, the per_rcpt option adds recipients to the
3101 measured rate one at a time; if it is used later (e.g. in acl_smtp_data)
3102 or in a non-SMTP ACL it adds all the recipients in one go. (The latter
3103 /count=$recipients_count behaviour used to work only in non-SMTP ACLs.)
3104 Note that using per_rcpt with a non-readonly update mode in more than
3105 one ACL will cause the recipients to be double-counted. (The per_mail
3106 and per_byte options don't have this problem.)
3108 The handling of very low rates has changed slightly. If the computed rate
3109 is less than the event's count (usually one) then this event is the first
3110 after a long gap. In this case the rate is set to the same as this event's
3111 count, so that the first message of a spam run is counted properly.
3113 The major new feature is a mechanism for counting the rate of unique
3114 events. The new per_addr option counts the number of different
3115 recipients that someone has sent messages to in the last time period. It
3116 behaves like per_rcpt if all the recipient addresses are different, but
3117 duplicate recipient addresses do not increase the measured rate. Like
3118 the /count= option this is a general mechanism, so the per_addr option
3119 is equivalent to per_rcpt/unique=$local_part@$domain. You can, for
3120 example, measure the rate that a client uses different sender addresses
3121 with the options per_mail/unique=$sender_address. There are further
3122 details in the main documentation.
3124 TF/05 Removed obsolete $Cambridge$ CVS revision strings.
3126 TF/06 Removed a few PCRE remnants.
3128 TF/07 Automatically extract Exim's version number from tags in the git
3129 repository when doing development or release builds.
3131 PP/02 Raise smtp_cmd_buffer_size to 16kB.
3132 Bugzilla 879. Patch from Paul Fisher.
3134 PP/03 Implement SSL-on-connect outbound with protocol=smtps on smtp transport.
3135 Heavily based on revision 40f9a89a from Simon Arlott's tree.
3138 PP/04 Use .dylib instead of .so for dynamic library loading on MacOS.
3140 PP/05 Variable $av_failed, true if the AV scanner deferred.
3141 Bugzilla 1078. Patch from John Horne.
3143 PP/06 Stop make process more reliably on build failure.
3144 Bugzilla 1087. Patch from Heiko Schlittermann.
3146 PP/07 Make maildir_use_size_file an _expandable_ boolean.
3147 Bugzilla 1089. Patch from Heiko Schlittermann.
3149 PP/08 Handle ${run} returning more data than OS pipe buffer size.
3150 Bugzilla 1131. Patch from Holger Weiß.
3152 PP/09 Handle IPv6 addresses with SPF.
3153 Bugzilla 860. Patch from Wolfgang Breyha.
3155 PP/10 GnuTLS: support TLS 1.2 & 1.1.
3157 Use gnutls_certificate_verify_peers2() [patch from Andreas Metzler].
3160 PP/11 match_* no longer expand right-hand-side by default.
3161 New compile-time build option, EXPAND_LISTMATCH_RHS.
3162 New expansion conditions, "inlist", "inlisti".
3164 PP/12 fix uninitialised greeting string from PP/03 (smtps client support).
3166 PP/13 shell and compiler warnings fixes for RC1-RC4 changes.
3168 PP/14 fix log_write() format string regression from TF/03.
3169 Bugzilla 1152. Patch from Dmitry Isaikin.
3175 PP/01 The new ldap_require_cert option would segfault if used. Fixed.
3177 PP/02 Harmonised TLS library version reporting; only show if debugging.
3178 Layout now matches that introduced for other libraries in 4.74 PP/03.
3180 PP/03 New openssl_options items: no_sslv2 no_sslv3 no_ticket no_tlsv1
3182 PP/04 New "dns_use_edns0" global option.
3184 PP/05 Don't segfault on misconfiguration of ref:name exim-user as uid.
3187 PP/06 Extra paranoia around buffer usage at the STARTTLS transition.
3188 nb: Exim is not vulnerable to http://www.kb.cert.org/vuls/id/555316
3190 TK/01 Updated PolarSSL code to 0.14.2.
3191 Bugzilla 1097. Patch from Andreas Metzler.
3193 PP/07 Catch divide-by-zero in ${eval:...}.
3194 Fixes bugzilla 1102.
3196 PP/08 Condition negation of bool{}/bool_lax{} did not negate. Fixed.
3199 TK/02 Bugzilla 1106: CVE-2011-1764 - DKIM log line was subject to a
3200 format-string attack -- SECURITY: remote arbitrary code execution.
3202 TK/03 SECURITY - DKIM signature header parsing was double-expanded, second
3203 time unintentionally subject to list matching rules, letting the header
3204 cause arbitrary Exim lookups (of items which can occur in lists, *not*
3205 arbitrary string expansion). This allowed for information disclosure.
3207 PP/09 Fix another SIGFPE (x86) in ${eval:...} expansion, this time related to
3208 INT_MIN/-1 -- value coerced to INT_MAX.
3214 NM/01 Workaround for PCRE version dependency in version reporting
3217 TF/01 Update valgrind.h and memcheck.h to copies from valgrind-3.6.0.
3218 This fixes portability to compilers other than gcc, notably
3219 Solaris CC and HP-UX CC. Fixes Bugzilla 1050.
3221 TF/02 Bugzilla 139: Avoid using the += operator in the modular lookup
3222 makefiles for portability to HP-UX and POSIX correctness.
3224 PP/01 Permit LOOKUP_foo enabling on the make command-line.
3225 Also via indented variable definition in the Makefile.
3226 (Debugging by Oliver Heesakkers).
3228 PP/02 Restore caching of spamd results with expanded spamd_address.
3229 Patch from author of expandable spamd_address patch, Wolfgang Breyha.
3231 PP/03 Build issue: lookups-Makefile now exports LC_ALL=C
3232 Improves build reliability. Fix from: Frank Elsner
3234 NM/02 Fix wide character breakage in the rfc2047 coding
3235 Fixes bug 1064. Patch from Andrey N. Oktyabrski
3237 NM/03 Allow underscore in dnslist lookups
3238 Fixes bug 1026. Patch from Graeme Fowler
3240 PP/04 Bugzilla 230: Support TLS-enabled LDAP (in addition to ldaps).
3241 Code patches from Adam Ciarcinski of NetBSD.
3243 NM/04 Fixed exiqgrep to cope with mailq missing size issue
3246 PP/05 Bugzilla 1083: when lookup expansion defers, escape the output which
3247 is logged, to avoid truncation. Patch from John Horne.
3249 PP/06 Bugzilla 1042: implement freeze_signal on pipe transports.
3250 Patch from Jakob Hirsch.
3252 PP/07 Bugzilla 1061: restrict error messages sent over SMTP to not reveal
3253 SQL string expansion failure details.
3254 Patch from Andrey Oktyabrski.
3256 PP/08 Bugzilla 486: implement %M datestamping in log filenames.
3257 Patch from Simon Arlott.
3259 PP/09 New lookups functionality failed to compile on old gcc which rejects
3260 extern declarations in function scope.
3261 Patch from Oliver Fleischmann
3263 PP/10 Use sig_atomic_t for flags set from signal handlers.
3264 Check getgroups() return and improve debugging.
3265 Fixed developed for diagnosis in bug 927 (which turned out to be
3268 PP/11 Bugzilla 1055: Update $message_linecount for maildir_tag.
3269 Patch from Mark Zealey.
3271 PP/12 Bugzilla 1056: Improved spamd server selection.
3272 Patch from Mark Zealey.
3274 PP/13 Bugzilla 1086: Deal with maildir quota file races.
3275 Based on patch from Heiko Schlittermann.
3277 PP/14 Bugzilla 1019: DKIM multiple signature generation fix.
3278 Patch from Uwe Doering, sign-off by Michael Haardt.
3280 NM/05 Fix to spam.c to accommodate older gcc versions which dislike
3281 variable declaration deep within a block. Bug and patch from
3284 PP/15 lookups-Makefile IRIX compatibility coercion.
3286 PP/16 Make DISABLE_DKIM build knob functional.
3288 NM/06 Bugzilla 968: child_open_uid: restore default SIGPIPE handler
3289 Patch by Simon Arlott
3291 TF/03 Fix valgrind.h portability to C89 compilers that do not support
3292 variable argument macros. Our copy now differs from upstream.
3298 TF/01 Failure to get a lock on a hints database can have serious
3299 consequences so log it to the panic log.
3301 TF/02 Log LMTP confirmation messages in the same way as SMTP,
3302 controlled using the smtp_confirmation log selector.
3304 TF/03 Include the error message when we fail to unlink a spool file.
3306 DW/01 Bugzilla 139: Support dynamically loaded lookups as modules.
3307 With thanks to Steve Haslam, Johannes Berg & Serge Demonchaux
3308 for maintaining out-of-tree patches for some time.
3310 PP/01 Bugzilla 139: Documentation and portability issues.
3311 Avoid GNU Makefile-isms, let Exim continue to build on BSD.
3312 Handle per-OS dynamic-module compilation flags.
3314 PP/02 Let /dev/null have normal permissions.
3315 The 4.73 fixes were a little too stringent and complained about the
3316 permissions on /dev/null. Exempt it from some checks.
3317 Reported by Andreas M. Kirchwitz.
3319 PP/03 Report version information for many libraries, including
3320 Exim version information for dynamically loaded libraries. Created
3321 version.h, now support a version extension string for distributors
3322 who patch heavily. Dynamic module ABI change.
3324 PP/04 CVE-2011-0017 - check return value of setuid/setgid. This is a
3325 privilege escalation vulnerability whereby the Exim run-time user
3326 can cause root to append content of the attacker's choosing to
3329 PP/05 Bugzilla 1041: merged DCC maintainer's fixes for return code.
3332 PP/06 Bugzilla 1071: fix delivery logging with untrusted macros.
3333 If dropping privileges for untrusted macros, we disabled normal logging
3334 on the basis that it would fail; for the Exim run-time user, this is not
3335 the case, and it resulted in successful deliveries going unlogged.
3336 Fixed. Reported by Andreas Metzler.
3342 PP/01 Date: & Message-Id: revert to normally being appended to a message,
3343 only prepend for the Resent-* case. Fixes regression introduced in
3344 Exim 4.70 by NM/22 for Bugzilla 607.
3346 PP/02 Include check_rfc2047_length in configure.default because we're seeing
3347 increasing numbers of administrators be bitten by this.
3349 JJ/01 Added DISABLE_DKIM and comment to src/EDITME
3351 PP/03 Bugzilla 994: added openssl_options main configuration option.
3353 PP/04 Bugzilla 995: provide better SSL diagnostics on failed reads.
3355 PP/05 Bugzilla 834: provide a permit_coredump option for pipe transports.
3357 PP/06 Adjust NTLM authentication to handle SASL Initial Response.
3359 PP/07 If TLS negotiated an anonymous cipher, we could end up with SSL but
3360 without a peer certificate, leading to a segfault because of an
3361 assumption that peers always have certificates. Be a little more
3362 paranoid. Problem reported by Martin Tscholak.
3364 PP/08 Bugzilla 926: switch ClamAV to use the new zINSTREAM API for content
3365 filtering; old API available if built with WITH_OLD_CLAMAV_STREAM=yes
3366 NB: ClamAV planning to remove STREAM in "middle of 2010".
3367 CL also introduces -bmalware, various -d+acl logging additions and
3368 more caution in buffer sizes.
3370 PP/09 Implemented reverse_ip expansion operator.
3372 PP/10 Bugzilla 937: provide a "debug" ACL control.
3374 PP/11 Bugzilla 922: Documentation dusting, patch provided by John Horne.
3376 PP/12 Bugzilla 973: Implement --version.
3378 PP/13 Bugzilla 752: Refuse to build/run if Exim user is root/0.
3380 PP/14 Build without WITH_CONTENT_SCAN. Path from Andreas Metzler.
3382 PP/15 Bugzilla 816: support multiple condition rules on Routers.
3384 PP/16 Add bool_lax{} expansion operator and use that for combining multiple
3385 condition rules, instead of bool{}. Make both bool{} and bool_lax{}
3386 ignore trailing whitespace.
3388 JJ/02 prevent non-panic DKIM error from being sent to paniclog
3390 JJ/03 added tcp_wrappers_daemon_name to allow host entries other than
3393 PP/17 Fix malware regression for cmdline scanner introduced in PP/08.
3394 Notification from Dr Andrew Aitchison.
3396 PP/18 Change ClamAV response parsing to be more robust and to handle ClamAV's
3397 ExtendedDetectionInfo response format.
3398 Notification from John Horne.
3400 PP/19 OpenSSL 1.0.0a compatibility const-ness change, should be backwards
3403 PP/20 Added a CONTRIBUTING file. Fixed the documentation build to use http:
3404 XSL and documented dependency on system catalogs, with examples of how
3407 DW/21 Added Valgrind hooks in store.c to help it capture out-of-bounds store
3410 DW/22 Bugzilla 1044: CVE-2010-4345 - partial fix: restrict default behaviour
3411 of CONFIGURE_OWNER and CONFIGURE_GROUP options to no longer allow a
3412 configuration file which is writeable by the Exim user or group.
3414 DW/23 Bugzilla 1044: CVE-2010-4345 - part two: extend checks for writeability
3415 of configuration files to cover files specified with the -C option if
3416 they are going to be used with root privileges, not just the default
3419 DW/24 Bugzilla 1044: CVE-2010-4345 - part three: remove ALT_CONFIG_ROOT_ONLY
3420 option (effectively making it always true).
3422 DW/25 Add TRUSTED_CONFIG_PREFIX_FILE option to allow alternative configuration
3423 files to be used while preserving root privileges.
3425 DW/26 Set FD_CLOEXEC on SMTP sockets after forking in the daemon, to ensure
3426 that rogue child processes cannot use them.
3428 PP/27 Bugzilla 1047: change the default for system_filter_user to be the Exim
3429 run-time user, instead of root.
3431 PP/28 Add WHITELIST_D_MACROS option to let some macros be overridden by the
3432 Exim run-time user without dropping privileges.
3434 DW/29 Remove use of va_copy() which breaks pre-C99 systems. Duplicate the
3435 result string, instead of calling string_vformat() twice with the same
3438 DW/30 Allow TRUSTED_CONFIG_PREFIX_FILE only for Exim or CONFIGURE_OWNER, not
3439 for other users. Others should always drop root privileges if they use
3440 -C on the command line, even for a whitelisted configure file.
3442 DW/31 Turn TRUSTED_CONFIG_PREFIX_FILE into TRUSTED_CONFIG_FILE. No prefixes.
3444 NM/01 Fixed bug #1002 - Message loss when using multiple deliveries
3450 JJ/01 installed exipick 20100104.1, adding $max_received_linelength,
3451 $data_path, and $header_path variables; fixed documentation bugs and
3454 JJ/02 installed exipick 20100222.0, added --input-dir and --finput to allow
3455 exipick to access non-standard spools, including the "frozen" queue
3458 NM/01 Bugzilla 965: Support mysql stored procedures.
3459 Patch from Alain Williams
3461 NM/02 Bugzilla 961: Spacing fix (syntax error) on Makefile directives for NetBSD
3463 NM/03 Bugzilla 955: Documentation fix for max_rcpts.
3464 Patch from Andreas Metzler
3466 NM/04 Bugzilla 954: Fix for unknown responses from Dovecot authenticator.
3467 Patch from Kirill Miazine
3469 NM/05 Bugzilla 671: Added umask to procmail example.
3471 JJ/03 installed exipick 20100323.0, fixing doc bug
3473 NM/06 Bugzilla 988: CVE-2010-2023 - prevent hardlink attack on sticky mail
3474 directory. Notification and patch from Dan Rosenberg.
3476 TK/01 PDKIM: Upgrade PolarSSL files to upstream version 0.12.1.
3478 TK/02 Improve log output when DKIM signing operation fails.
3480 MH/01 Treat the transport option dkim_domain as a colon separated
3481 list, not as a single string, and sign the message with each element,
3482 omitting multiple occurences of the same signer.
3484 NM/07 Null terminate DKIM strings, Null initialise DKIM variable
3485 Bugzilla 985, 986. Patch by Simon Arlott
3487 NM/08 Bugzilla 967. dnsdb DNS TXT record bug fix (DKIM-related)
3488 Patch by Simon Arlott
3490 PP/01 Bugzilla 989: CVE-2010-2024 - work round race condition on
3491 MBX locking. Notification from Dan Rosenberg.
3497 TK/01 Bugzilla 912: Fix DKIM segfault on empty headers/body.
3499 NM/01 Bugzilla 913: Documentation fix for gnutls_* options.
3501 NM/02 Bugzilla 722: Documentation for randint. Better randomness defaults.
3503 NM/03 Bugzilla 847: Enable DNSDB lookup by default.
3505 NM/04 Bugzilla 915: Flag broken perl installation during build.
3511 TK/01 Added patch by Johannes Berg that expands the main option
3512 "spamd_address" if it starts with a dollar sign.
3514 TK/02 Write list of recipients to X-Envelope-Sender header when building
3515 the mbox-format spool file for content scanning (suggested by Jakob
3518 TK/03 Added patch by Wolfgang Breyha that adds experimental DCC
3519 (http://www.dcc-servers.net/) support via dccifd. Activated by
3520 setting EXPERIMENTAL_DCC=yes in Local/Makefile.
3522 TK/04 Bugzilla 673: Add f-protd malware scanner support. Patch submitted
3523 by Mark Daniel Reidel <mr@df.eu>.
3525 NM/01 Bugzilla 657: Embedded PCRE removed from the exim source tree.
3526 When building exim an external PCRE library is now needed -
3527 PCRE is a system library on the majority of modern systems.
3528 See entry on PCRE_LIBS in EDITME file.
3530 NM/02 Bugzilla 646: Removed unwanted C/R in Dovecot authenticator
3531 conversation. Added nologin parameter to request.
3532 Patch contributed by Kirill Miazine.
3534 TF/01 Do not log submission mode rewrites if they do not change the address.
3536 TF/02 Bugzilla 662: Fix stack corruption before exec() in daemon.c.
3538 NM/03 Bugzilla 602: exicyclog now handles panic log, and creates empty
3539 log files in place. Contributed by Roberto Lima.
3541 NM/04 Bugzilla 667: Close socket used by dovecot authenticator.
3543 TF/03 Bugzilla 615: When checking the local_parts router precondition
3544 after a local_part_suffix or local_part_prefix option, Exim now
3545 does not use the address's named list lookup cache, since this
3546 contains cached lookups for the whole local part.
3548 NM/05 Bugzilla 521: Integrated SPF Best Guess support contributed by
3549 Robert Millan. Documentation is in experimental-spec.txt.
3551 TF/04 Bugzilla 668: Fix parallel build (make -j).
3553 NM/05.2 Bugzilla 437: Prevent Maildir aux files being created with mode 000.
3555 NM/05.3 Bugzilla 598: Improvement to Dovecot authenticator handling.
3556 Patch provided by Jan Srzednicki.
3558 TF/05 Leading white space used to be stripped from $spam_report which
3559 wrecked the formatting. Now it is preserved.
3561 TF/06 Save $spam_score, $spam_bar, and $spam_report in spool files, so
3562 that they are available at delivery time.
3564 TF/07 Fix the way ${extract is skipped in the untaken branch of a conditional.
3566 TF/08 TLS error reporting now respects the incoming_interface and
3567 incoming_port log selectors.
3569 TF/09 Produce a more useful error message if an SMTP transport's hosts
3570 setting expands to an empty string.
3572 NM/06 Bugzilla 744: EXPN did not work under TLS.
3573 Patch provided by Phil Pennock.
3575 NM/07 Bugzilla 769: Extraneous comma in usage fprintf
3576 Patch provided by Richard Godbee.
3578 NM/08 Fixed erroneous documentation references to smtp_notquit_acl to be
3579 acl_smtp_notquit, added index entry.
3581 NM/09 Bugzilla 787: Potential buffer overflow in string_format.
3582 Patch provided by Eugene Bujak.
3584 NM/10 Bugzilla 770: Problem on some platforms modifying the len parameter to
3585 accept(). Patch provided by Maxim Dounin.
3587 NM/11 Bugzilla 749: Preserve old behaviour of blanks comparing equal to zero.
3588 Patch provided by Phil Pennock.
3590 NM/12 Bugzilla 497: Correct behaviour of exiwhat when no config exists.
3592 NM/13 Bugzilla 590: Correct handling of Resent-Date headers.
3593 Patch provided by Brad "anomie" Jorsch.
3595 NM/14 Bugzilla 622: Added timeout setting to transport filter.
3596 Patch provided by Dean Brooks.
3598 TK/05 Add native DKIM support (does not depend on external libraries).
3600 NM/15 Bugzilla 854: Removed code that symlinks to pcre as its no longer useful.
3601 Patch provided by Graeme Fowler.
3603 NM/16 Bugzilla 851: Documentation example syntax fix.
3605 NM/17 Changed NOTICE file to remove references to embedded PCRE.
3607 NM/18 Bugzilla 894: Fix issue with very long lines including comments in
3610 NM/19 Bugzilla 745: TLS version reporting.
3611 Patch provided by Phil Pennock.
3613 NM/20 Bugzilla 167: bool: condition support.
3614 Patch provided by Phil Pennock.
3616 NM/21 Bugzilla 665: gnutls_compat_mode to allow compatibility with broken
3617 clients. Patch provided by Phil Pennock.
3619 NM/22 Bugzilla 607: prepend (not append) Resent-Message-ID and Resent-Date.
3620 Patch provided by Brad "anomie" Jorsch.
3622 NM/23 Bugzilla 687: Fix misparses in eximstats.
3623 Patch provided by Heiko Schlittermann.
3625 NM/24 Bugzilla 688: Fix exiwhat to handle log_selector = +pid.
3626 Patch provided by Heiko Schlittermann.
3628 NM/25 Bugzilla 727: Use transport mode as default mode for maildirsize file.
3629 plus update to original patch.
3631 NM/26 Bugzilla 799: Documentation correction for ratelimit.
3633 NM/27 Bugzilla 802: Improvements to local interface IP addr detection.
3634 Patch provided by David Brownlee.
3636 NM/28 Bugzilla 807: Improvements to LMTP delivery logging.
3638 NM/29 Bugzilla 862, 866, 875: Documentation bugfixes.
3640 NM/30 Bugzilla 888: TLS documentation bugfixes.
3642 NM/31 Bugzilla 896: Dovecot buffer overrun fix.
3644 NM/32 Bugzilla 889: Change all instances of "expr" in shell scripts to "expr --"
3645 Unlike the original bugzilla I have changed all shell scripts in src tree.
3647 NM/33 Bugzilla 898: Transport filter timeout fix.
3648 Patch by Todd Rinaldo.
3650 NM/34 Bugzilla 901: Fix sign/unsigned and UTF mismatches.
3651 Patch by Serge Demonchaux.
3653 NM/35 Bugzilla 39: Base64 decode bug fixes.
3654 Patch by Jakob Hirsch.
3656 NM/36 Bugzilla 909: Correct connect() call in dcc code.
3658 NM/37 Bugzilla 910: Correct issue with relaxed/simple handling.
3660 NM/38 Bugzilla 908: Removed NetBSD3 support as no longer needed.
3662 NM/39 Bugzilla 911: Fixed MakeLinks build script.
3668 TK/01 Add preliminary DKIM support. Currently requires a forked version of
3669 ALT-N's libdkim that I have put here:
3670 http://duncanthrax.net/exim-experimental/
3672 Note to Michael Haardt: I had to rename some vars in sieve.c. They
3673 were called 'true' and it seems that C99 defines that as a reserved
3674 keyword to be used with 'bool' variable types. That means you could
3675 not include C99-style headers which use bools without triggering
3676 build errors in sieve.c.
3678 NM/01 Bugzilla 592: --help option is handled incorrectly if exim is invoked
3679 as mailq or other aliases. Changed the --help handling significantly
3680 to do whats expected. exim_usage() emits usage/help information.
3682 SC/01 Added the -bylocaldomain option to eximstats.
3684 NM/02 Bugzilla 619: Defended against bad data coming back from gethostbyaddr.
3686 NM/03 Bugzilla 613: Documentation fix for acl_not_smtp.
3688 NM/04 Bugzilla 628: PCRE update to 7.4 (work done by John Hall).
3694 PH/01 Another patch from the Sieve maintainer.
3696 PH/02 When an IPv6 address is converted to a string for single-key lookup
3697 in an address list (e.g. for an item such as "net24-dbm;/net/works"),
3698 dots are used instead of colons so that keys in lsearch files need not
3699 contain colons. This was done some time before quoting was made available
3700 in lsearch files. However, iplsearch files do require colons in IPv6 keys
3701 (notated using the quote facility) so as to distinguish them from IPv4
3702 keys. This meant that lookups for IP addresses in host lists did not work
3703 for iplsearch lookups.
3705 This has been fixed by arranging for IPv6 addresses to be expressed with
3706 colons if the lookup type is iplsearch. This is not incompatible, because
3707 previously such lookups could never work.
3709 The situation is now rather anomalous, since one *can* have colons in
3710 ordinary lsearch keys. However, making the change in all cases is
3711 incompatible and would probably break a number of configurations.
3713 TK/01 Change PRVS address formatting scheme to reflect latests BATV draft
3716 MH/01 The "spam" ACL condition code contained a sscanf() call with a %s
3717 conversion specification without a maximum field width, thereby enabling
3718 a rogue spamd server to cause a buffer overflow. While nobody in their
3719 right mind would setup Exim to query an untrusted spamd server, an
3720 attacker that gains access to a server running spamd could potentially
3721 exploit this vulnerability to run arbitrary code as the Exim user.
3723 TK/02 Bugzilla 502: Apply patch to make the SPF-Received: header use
3724 $primary_hostname instead of what libspf2 thinks the hosts name is.
3726 MH/02 The dsearch lookup now uses lstat(2) instead of stat(2) to look for
3727 a directory entry by the name of the lookup key. Previously, if a
3728 symlink pointed to a non-existing file or a file in a directory that
3729 Exim lacked permissions to read, a lookup for a key matching that
3730 symlink would fail. Now it is enough that a matching directory entry
3731 exists, symlink or not. (Bugzilla 503.)
3733 PH/03 The body_linecount and body_zerocount variables are now exported in the
3736 PH/04 Added the $dnslist_matched variable.
3738 PH/05 Unset $tls_cipher and $tls_peerdn before making a connection as a client.
3739 This means they are set thereafter only if the connection becomes
3742 PH/06 Added the client_condition to authenticators so that some can be skipped
3743 by clients under certain conditions.
3745 PH/07 The error message for a badly-placed control=no_multiline_responses left
3746 "_responses" off the end of the name.
3748 PH/08 Added -Mvc to output a copy of a message in RFC 2822 format.
3750 PH/09 Tidied the code for creating ratelimiting keys, creating them explicitly
3751 (without spaces) instead of just copying the configuration text.
3753 PH/10 Added the /noupdate option to the ratelimit ACL condition.
3755 PH/11 Added $max_received_linelength.
3757 PH/12 Added +ignore_defer and +include_defer to host lists.
3759 PH/13 Installed PCRE version 7.2. This needed some changes because of the new
3760 way in which PCRE > 7.0 is built.
3762 PH/14 Implemented queue_only_load_latch.
3764 PH/15 Removed an incorrect (int) cast when reading the value of SIZE in a
3765 MAIL command. The effect was to mangle the value on 64-bit systems.
3767 PH/16 Another patch from the Sieve maintainer.
3769 PH/17 Added the NOTQUIT ACL, based on a patch from Ted Cooper.
3771 PH/18 If a system quota error occurred while trying to create the file for
3772 a maildir delivery, the message "Mailbox is full" was not appended to the
3773 bounce if the delivery eventually timed out. Change 4.67/27 below applied
3774 only to a quota excession during the actual writing of the file.
3776 PH/19 It seems that peer DN values may contain newlines (and other non-printing
3777 characters?) which causes problems in log lines. The DN values are now
3778 passed through string_printing() before being added to log lines.
3780 PH/20 Added the "servers=" facility to MySQL and PostgreSQL lookups. (Oracle
3781 and InterBase are left for another time.)
3783 PH/21 Added message_body_newlines option.
3785 PH/22 Guard against possible overflow in moan_check_errorcopy().
3787 PH/23 POSIX allows open() to be a macro; guard against that.
3789 PH/24 If the recipient of an error message contained an @ in the local part
3790 (suitably quoted, of course), incorrect values were put in $domain and
3791 $local_part during the evaluation of errors_copy.
3797 MH/01 Fix for bug #448, segfault in Dovecot authenticator when interface_address
3798 is unset (happens when testing with -bh and -oMi isn't used). Thanks to
3801 PH/01 Added a new log selector smtp_no_mail, to log SMTP sessions that do not
3802 issue a MAIL command.
3804 PH/02 In an ACL statement such as
3806 deny dnslists = X!=127.0.0.2 : X=127.0.0.2
3808 if a client was not listed at all, or was listed with a value other than
3809 127.0.0.2, in the X list, but was listed with 127.0.0.2 in the Y list,
3810 the condition was not true (as it should be), so access was not denied.
3811 The bug was that the ! inversion was incorrectly passed on to the second
3812 item. This has been fixed.
3814 PH/03 Added additional dnslists conditions == and =& which are different from
3815 = and & when the dns lookup returns more than one IP address.
3817 PH/04 Added gnutls_require_{kx,mac,protocols} to give more control over the
3818 cipher suites used by GnuTLS. These options are ignored by OpenSSL.
3820 PH/05 After discussion on the list, added a compile time option ENABLE_DISABLE_
3821 FSYNC, which compiles an option called disable_fsync that allows for
3822 bypassing fsync(). The documentation is heavily laced with warnings.
3824 SC/01 Updated eximstats to collate all SpamAssassin rejects into one bucket.
3826 PH/06 Some tidies to the infrastructure of the Test Suite that is concerned
3827 with the auxiliary C programs that it uses: (1) Arrange for BIND_8_COMPAT
3828 to be defined when compiling on OSX (Darwin); (2) Tidies to the Makefile,
3829 including adding "make clean"; (3) Added -fPIC when compiling the test
3830 dynamically loaded module, to get rid of a warning.
3832 MH/02 Fix for bug #451, causing paniclog entries to be written if a bounce
3833 message fails, move_frozen_messages = true and ignore_bounce_errors_after
3834 = 0s. The bug is otherwise harmless.
3836 PH/07 There was a bug in the dovecot authenticator such that the value of
3837 $auth1 could be overwritten, and so not correctly preserved, after a
3838 successful authentication. This usually meant that the value preserved by
3839 the server_setid option was incorrect.
3841 PH/08 Added $smtp_count_at_connection_start, deliberately with a long name.
3843 PH/09 Installed PCRE release 7.0.
3845 PH/10 The acl_not_smtp_start ACL was, contrary to the documentation, not being
3846 run for batched SMTP input. It is now run at the start of every message
3847 in the batch. While fixing this I discovered that the process information
3848 (output by running exiwhat) was not always getting set for -bs and -bS
3849 input. This is fixed, and it now also says "batched" for BSMTP.
3851 PH/11 Added control=no_pipelining.
3853 PH/12 Added $sending_ip_address and $sending_port (mostly Magnus Holmgren's
3854 patch, slightly modified), and move the expansion of helo_data till after
3855 the connection is made in the smtp transport (so it can use these
3858 PH/13 Added ${rfc2047d: to decoded RFC 2047 strings.
3860 PH/14 Added log_selector = +pid.
3862 PH/15 Flush SMTP output before delaying, unless control=no_delay_flush is set.
3864 PH/16 Add ${if forany and ${if forall.
3866 PH/17 Added dsn_from option to vary the From: line in DSNs.
3868 PH/18 Flush SMTP output before performing a callout, unless control =
3869 no_callout_flush is set.
3871 PH/19 Change 4.64/PH/36 introduced a bug: when address_retry_include_sender
3872 was true (the default) a successful delivery failed to delete the retry
3873 item, thus causing premature timeout of the address. The bug is now
3876 PH/20 Added hosts_avoid_pipelining to the smtp transport.
3878 PH/21 Long custom messages for fakedefer and fakereject are now split up
3879 into multiline responses in the same way that messages for "deny" and
3880 other ACL rejections are.
3882 PH/22 Applied Jori Hamalainen's speed-up changes and typo fixes to exigrep,
3883 with slight modification.
3885 PH/23 Applied sieve patches from the maintainer "tracking the latest notify
3886 draft, changing the syntax and factoring some duplicate code".
3888 PH/24 When the log selector "outgoing_port" was set, the port was shown as -1
3889 for deliveries of the second and subsequent messages over the same SMTP
3892 PH/25 Applied Magnus Holmgren's patch for ${addresses, ${map, ${filter, and
3893 ${reduce, with only minor "tidies".
3895 SC/02 Applied Daniel Tiefnig's patch to improve the '($parent) =' pattern match.
3897 PH/26 Added a "continue" ACL modifier that does nothing, for the benefit of its
3898 expansion side effects.
3900 PH/27 When a message times out after an over-quota error from an Exim-imposed
3901 quota, the bounce message says "mailbox is full". This message was not
3902 being given when it was a system quota that was exceeded. It now should
3905 MH/03 Made $recipients available in local_scan(). local_scan() already has
3906 better access to the recipient list through recipients_list[], but
3907 $recipients can be useful in postmaster-provided expansion strings.
3909 PH/28 The $smtp_command and $smtp_command_argument variables were not correct
3910 in the case of a MAIL command with additional options following the
3911 address, for example: MAIL FROM:<foo@bar> SIZE=1234. The option settings
3912 were accidentally chopped off.
3914 PH/29 SMTP synchronization checks are implemented when a command is read -
3915 there is a check that no more input is waiting when there shouldn't be
3916 any. However, for some commands, a delay in an ACL can mean that it is
3917 some time before the response is written. In this time, more input might
3918 arrive, invalidly. So now there are extra checks after an ACL has run for
3919 HELO/EHLO and after the predata ACL, and likewise for MAIL and RCPT when
3920 pipelining has not been advertised.
3922 PH/30 MH's patch to allow iscntrl() characters to be list separators.
3924 PH/31 Unlike :fail:, a custom message specified with :defer: was not being
3925 returned in the SMTP response when smtp_return_error_details was false.
3926 This has been fixed.
3928 PH/32 Change the Dovecot authenticator to use read() and write() on the socket
3929 instead of the C I/O that was originally supplied, because problems were
3930 reported on Solaris.
3932 PH/33 Compile failed with OpenSSL 0.9.8e. This was due to a coding error in
3933 Exim which did not show up earlier: it was assuming that a call to
3934 SSL_CTX_set_info_callback() might give an error value. In fact, there is
3935 no error. In previous releases of OpenSSL, SSL_CTX_set_info_callback()
3936 was a macro that became an assignment, so it seemed to work. This has
3937 changed to a proper function call with a void return, hence the compile
3938 error. Exim's code has been fixed.
3940 PH/34 Change HDA_SIZE in oracle.c from 256 to 512. This is needed for 64-bit
3943 PH/35 Applied a patch from the Sieve maintainer which fixes a bug in "notify".
3945 PH/36 Applied John Jetmore's patch to add -v functionality to exigrep.
3947 PH/37 If a message is not accepted after it has had an id assigned (e.g.
3948 because it turns out to be too big or there is a timeout) there is no
3949 "Completed" line in the log. When some messages of this type were
3950 selected by exigrep, they were listed as "not completed". Others were
3951 picked up by some special patterns. I have improved the selection
3952 criteria to be more general.
3954 PH/38 The host_find_failed option in the manualroute router can now be set
3955 to "ignore", to completely ignore a host whose IP address cannot be
3956 found. If all hosts are ignored, the behaviour is controlled by the new
3957 host_all_ignored option.
3959 PH/39 In a list of hosts for manualroute, if one item (either because of multi-
3960 homing or because of multiple MX records with /mx) generated more than
3961 one IP address, and the following item turned out to be the local host,
3962 all the secondary addresses of the first item were incorrectly removed
3963 from the list, along with the local host and any following hosts (which
3964 is what is supposed to happen).
3966 PH/40 When Exim receives a message, it writes the login name, uid, and gid of
3967 whoever called Exim into the -H file. In the case of the daemon it was
3968 behaving confusingly. When first started, it used values for whoever
3969 started the daemon, but after a SIGHUP it used the Exim user (because it
3970 calls itself on a restart). I have changed the code so that it now always
3973 PH/41 (Following a suggestion from Tony Finch) If all the RCPT commands in a
3974 message are rejected with the same error (e.g. no authentication or bad
3975 sender address), and a DATA command is nevertheless sent (as can happen
3976 with PIPELINING or a stupid MUA), the error message that was given to the
3977 RCPT commands is included in the rejection of the DATA command. This is
3978 intended to be helpful for MUAs that show only the final error to their
3981 PH/42 Another patch from the Sieve maintainer.
3983 SC/02 Eximstats - Differentiate between permanent and temporary rejects.
3984 Eximstats - Fixed some broken HTML links and added missing column headers
3986 Eximstats - Fixed Grand Total Summary Domains, Edomains, and Email
3987 columns for Rejects, Temp Rejects, Ham, and Spam rows.
3989 SC/03 Eximstats - V1.58 Fix to get <> and blackhole to show in edomain tables.
3991 PH/43 Yet another patch from the Sieve maintainer.
3993 PH/44 I found a way to check for a TCP/IP connection going away before sending
3994 the response to the final '.' that terminates a message, but only in the
3995 case where the client has not sent further data following the '.'
3996 (unfortunately, this is allowed). However, in many cases there won't be
3997 any further data because there won't be any more messages to send. A call
3998 to select() can be used: if it shows that the input is "ready", there is
3999 either input waiting, or the socket has been closed. An attempt to read
4000 the next input character can distinguish the two cases. Previously, Exim
4001 would have sent an OK response which the client would never have see.
4002 This could lead to message repetition. This fix should cure that, at
4003 least in a lot of common cases.
4005 PH/45 Do not advertise STARTTLS in response to HELP unless it would be
4006 advertised in response to EHLO.
4012 PH/01 Two more bugs that were introduced by 4.64/PH/07, in addition to the one
4013 fixed by 4.65/MH/01 (is this a record?) are fixed:
4015 (i) An empty string was always treated as zero by the numeric comparison
4016 operators. This behaviour has been restored.
4018 (ii) It is documented that the numeric comparison operators always treat
4019 their arguments as decimal numbers. This was broken in that numbers
4020 starting with 0 were being interpreted as octal.
4022 While fixing these problems I realized that there was another issue that
4023 hadn't been noticed. Values of message_size_limit (both the global option
4024 and the transport option) were treated as octal if they started with 0.
4025 The documentation was vague. These values are now always treated as
4026 decimal, and I will make that clear in the documentation.
4032 TK/01 Disable default definition of HAVE_LINUX_SENDFILE. Clashes with
4033 Linux large file support (_FILE_OFFSET_BITS=64) on older glibc
4036 MH/01 Don't check that the operands of numeric comparison operators are
4037 integers when their expansion is in "skipping" mode (fixes bug
4038 introduced by 4.64-PH/07).
4040 PH/01 If a system filter or a router generates more than SHRT_MAX (32767)
4041 child addresses, Exim now panics and dies. Previously, because the count
4042 is held in a short int, deliveries were likely to be lost. As such a
4043 large number of recipients for a single message is ridiculous
4044 (performance will be very, very poor), I have chosen to impose a limit
4045 rather than extend the field.
4051 TK/01 Bugzilla #401. Fix DK spooling code so that it can overwrite a
4052 leftover -K file (the existence of which was triggered by #402).
4053 While we were at it, introduced process PID as part of the -K
4054 filename. This should rule out race conditions when creating
4057 TK/02 Bugzilla #402. Apply patch from Simon Arlott, speeding up DK signing
4058 processing considerably. Previous code took too long for large mails,
4059 triggering a timeout which in turn triggers #401.
4061 TK/03 Introduced HAVE_LINUX_SENDFILE to os.h-Linux. Currently only used
4062 in the DK code in transports.c. sendfile() is not really portable,
4063 hence the _LINUX specificness.
4065 TF/01 In the add_headers option to the mail command in an Exim filter,
4066 there was a bug that Exim would claim a syntax error in any
4067 header after the first one which had an odd number of characters
4070 PH/01 If a server that rejects MAIL FROM:<> was the target of a sender
4071 callout verification, Exim cached a "reject" for the entire domain. This
4072 is correct for most verifications, but it is not correct for a recipient
4073 verification with use_sender or use_postmaster set, because in that case
4074 the callout does not use MAIL FROM:<>. Exim now distinguishes the special
4075 case of MAIL FROM:<> rejection from other early rejections (e.g.
4076 rejection of HELO). When verifying a recipient using a non-null MAIL
4077 address, the cache is ignored if it shows MAIL FROM:<> rejection.
4078 Whatever the result of the callout, the value of the domain cache is
4079 left unchanged (for any other kind of callout, getting as far as trying
4080 RCPT means that the domain itself is ok).
4082 PH/02 Tidied a number of unused variable and signed/unsigned warnings that
4085 PH/03 On Solaris, an unexpectedly close socket (dropped connection) can
4086 manifest itself as EPIPE rather than ECONNECT. When tidying away a
4087 session, the daemon ignores ECONNECT errors and logs others; it now
4088 ignores EPIPE as well.
4090 PH/04 Applied Nico Erfurth's refactoring patch to tidy up mime.c
4091 (quoted-printable decoding).
4093 PH/05 Applied Nico Erfurth's refactoring patch to tidy up spool_mbox.c, and
4094 later the small subsequent patch to fix an introduced bug.
4096 PH/06 Installed the latest Cygwin Makefile from the Cygwin maintainer.
4098 PH/07 There was no check for overflow in expansions such as ${if >{1}{4096M}}.
4100 PH/08 An error is now given if message_size_limit is specified negative.
4102 PH/09 Applied and tidied up Jakob Hirsch's patch for allowing ACL variables
4103 to be given (somewhat) arbitrary names.
4105 JJ/01 exipick 20060919.0, allow for arbitrary acl_ variables introduced
4108 JJ/02 exipick 20060919.0, --show-vars args can now be regular expressions,
4109 miscellaneous code fixes
4111 PH/10 Added the log_reject_target ACL modifier to specify where to log
4114 PH/11 Callouts were setting the name used for EHLO/HELO from $smtp_active_
4115 hostname. This is wrong, because it relates to the incoming message (and
4116 probably the interface on which it is arriving) and not to the outgoing
4117 callout (which could be using a different interface). This has been
4118 changed to use the value of the helo_data option from the smtp transport
4119 instead - this is what is used when a message is actually being sent. If
4120 there is no remote transport (possible with a router that sets up host
4121 addresses), $smtp_active_hostname is used.
4123 PH/12 Installed Andrey Panin's patch to add a dovecot authenticator. Various
4124 tweaks were necessary in order to get it to work (see also 21 below):
4125 (a) The code assumed that strncpy() returns a negative number on buffer
4126 overflow, which isn't the case. Replaced with Exim's string_format()
4128 (b) There were several signed/unsigned issues. I just did the minimum
4129 hacking in of casts. There is scope for a larger refactoring.
4130 (c) The code used strcasecmp() which is not a standard C function.
4131 Replaced with Exim's strcmpic() function.
4132 (d) The code set only $1; it now sets $auth1 as well.
4133 (e) A simple test gave the error "authentication client didn't specify
4134 service in request". It would seem that Dovecot has changed its
4135 interface. Fortunately there's a specification; I followed it and
4136 changed what the client sends and it appears to be working now.
4138 PH/13 Added $message_headers_raw to provide the headers without RFC 2047
4141 PH/14 Corrected misleading output from -bv when -v was also used. Suppose the
4142 address A is aliased to B and C, where B exists and C does not. Without
4143 -v the output is "A verified" because verification stops after a
4144 successful redirection if more than one address is generated. However,
4145 with -v the child addresses are also verified. Exim was outputting "A
4146 failed to verify" and then showing the successful verification for C,
4147 with its parentage. It now outputs "B failed to verify", showing B's
4148 parentage before showing the successful verification of C.
4150 PH/15 Applied Michael Deutschmann's patch to allow DNS black list processing to
4151 look up a TXT record in a specific list after matching in a combined
4154 PH/16 It seems that the options setting for the resolver (RES_DEFNAMES and
4155 RES_DNSRCH) can affect the behaviour of gethostbyname() and friends when
4156 they consult the DNS. I had assumed they would set it the way they
4157 wanted; and indeed my experiments on Linux seem to show that in some
4158 cases they do (I could influence IPv6 lookups but not IPv4 lookups).
4159 To be on the safe side, however, I have now made the interface to
4160 host_find_byname() similar to host_find_bydns(), with an argument
4161 containing the DNS resolver options. The host_find_byname() function now
4162 sets these options at its start, just as host_find_bydns() does. The smtp
4163 transport options dns_qualify_single and dns_search_parents are passed to
4164 host_find_byname() when gethostbyname=TRUE in this transport. Other uses
4165 of host_find_byname() use the default settings of RES_DEFNAMES
4166 (qualify_single) but not RES_DNSRCH (search_parents).
4168 PH/17 Applied (a modified version of) Nico Erfurth's patch to make
4169 spool_read_header() do less string testing, by means of a preliminary
4170 switch on the second character of optional "-foo" lines. (This is
4171 overdue, caused by the large number of possibilities that now exist.
4172 Originally there were few.) While I was there, I also converted the
4173 str(n)cmp tests so they don't re-test the leading "-" and the first
4174 character, in the hope this might squeeze out yet more improvement.
4176 PH/18 Two problems with "group" syntax in header lines when verifying: (1) The
4177 flag allowing group syntax was set by the header_syntax check but not
4178 turned off, possible causing trouble later; (2) The flag was not being
4179 set at all for the header_verify test, causing "group"-style headers to
4180 be rejected. I have now set it in this case, and also caused header_
4181 verify to ignore an empty address taken from a group. While doing this, I
4182 came across some other cases where the code for allowing group syntax
4183 while scanning a header line wasn't quite right (mostly, not resetting
4184 the flag correctly in the right place). These bugs could have caused
4185 trouble for malformed header lines. I hope it is now all correct.
4187 PH/19 The functions {pwcheck,saslauthd}_verify_password() are always called
4188 with the "reply" argument non-NULL. The code, however (which originally
4189 came from elsewhere) had *some* tests for NULL when it wrote to *reply,
4190 but it didn't always do it. This confused somebody who was copying the
4191 code for some other use. I have removed all the tests.
4193 PH/20 It was discovered that the GnuTLS code had support for RSA_EXPORT, a
4194 feature that was used to support insecure browsers during the U.S. crypto
4195 embargo. It requires special client support, and Exim is probably the
4196 only MTA that supported it -- and would never use it because real RSA is
4197 always available. This code has been removed, because it had the bad
4198 effect of slowing Exim down by computing (never used) parameters for the
4199 RSA_EXPORT functionality.
4201 PH/21 On the advice of Timo Sirainen, added a check to the dovecot
4202 authenticator to fail if there's a tab character in the incoming data
4203 (there should never be unless someone is messing about, as it's supposed
4204 to be base64-encoded). Also added, on Timo's advice, the "secured" option
4205 if the connection is using TLS or if the remote IP is the same as the
4206 local IP, and the "valid-client-cert option" if a client certificate has
4209 PH/22 As suggested by Dennis Davis, added a server_condition option to *all*
4210 authenticators. This can be used for authorization after authentication
4211 succeeds. (In the case of plaintext, it servers for both authentication
4214 PH/23 Testing for tls_required and lost_connection in a retry rule didn't work
4215 if any retry times were supplied.
4217 PH/24 Exim crashed if verify=helo was activated during an incoming -bs
4218 connection, where there is no client IP address to check. In this
4219 situation, the verify now always succeeds.
4221 PH/25 Applied John Jetmore's -Mset patch.
4223 PH/26 Added -bem to be like -Mset, but loading a message from a file.
4225 PH/27 In a string expansion for a processed (not raw) header when multiple
4226 headers of the same name were present, leading whitespace was being
4227 removed from all of them, but trailing whitespace was being removed only
4228 from the last one. Now trailing whitespace is removed from each header
4229 before concatenation. Completely empty headers in a concatenation (as
4230 before) are ignored.
4232 PH/28 Fixed bug in backwards-compatibility feature of PH/09 (thanks to John
4233 Jetmore). It would have mis-read ACL variables from pre-4.61 spool files.
4235 PH/29 [Removed. This was a change that I later backed out, and forgot to
4236 correct the ChangeLog entry (that I had efficiently created) before
4237 committing the later change.]
4239 PH/30 Exim was sometimes attempting to deliver messages that had suffered
4240 address errors (4xx response to RCPT) over the same connection as other
4241 messages routed to the same hosts. Such deliveries are always "forced",
4242 so retry times are not inspected. This resulted in far too many retries
4243 for the affected addresses. The effect occurred only when there were more
4244 hosts than the hosts_max_try setting in the smtp transport when it had
4245 the 4xx errors. Those hosts that it had tried were not added to the list
4246 of hosts for which the message was waiting, so if all were tried, there
4247 was no problem. Two fixes have been applied:
4249 (i) If there are any address or message errors in an SMTP delivery, none
4250 of the hosts (tried or untried) are now added to the list of hosts
4251 for which the message is waiting, so the message should not be a
4252 candidate for sending over the same connection that was used for a
4253 successful delivery of some other message. This seems entirely
4254 reasonable: after all the message is NOT "waiting for some host".
4255 This is so "obvious" that I'm not sure why it wasn't done
4256 previously. Hope I haven't missed anything, but it can't do any
4257 harm, as the worst effect is to miss an optimization.
4259 (ii) If, despite (i), such a delivery is accidentally attempted, the
4260 routing retry time is respected, so at least it doesn't keep
4261 hammering the server.
4263 PH/31 Installed Andrew Findlay's patch to close the writing end of the socket
4264 in ${readsocket because some servers need this prod.
4266 PH/32 Added some extra debug output when updating a wait-xxx database.
4268 PH/33 The hint "could be header name not terminated by colon", which has been
4269 given for certain expansion errors for a long time, was not being given
4270 for the ${if def:h_colon_omitted{... case.
4272 PH/34 The spec says: "With one important exception, whenever a domain list is
4273 being scanned, $domain contains the subject domain." There was at least
4274 one case where this was not true.
4276 PH/35 The error "getsockname() failed: connection reset by peer" was being
4277 written to the panic log as well as the main log, but it isn't really
4278 panic-worthy as it just means the connection died rather early on. I have
4279 removed the panic log writing for the ECONNRESET error when getsockname()
4282 PH/36 After a 4xx response to a RCPT error, that address was delayed (in queue
4283 runs only) independently of the message's sender address. This meant
4284 that, if the 4xx error was in fact related to the sender, a different
4285 message to the same recipient with a different sender could confuse
4286 things. In particular, this can happen when sending to a greylisting
4287 server, but other circumstances could also provoke similar problems.
4288 I have changed the default so that the retry time for these errors is now
4289 based a combination of the sender and recipient addresses. This change
4290 can be overridden by setting address_retry_include_sender=false in the
4293 PH/37 For LMTP over TCP/IP (the smtp transport), error responses from the
4294 remote server are returned as part of bounce messages. This was not
4295 happening for LMTP over a pipe (the lmtp transport), but now it is the
4296 same for both kinds of LMTP.
4298 PH/38 Despite being documented as not happening, Exim was rewriting addresses
4299 in header lines that were in fact CNAMEs. This is no longer the case.
4301 PH/39 If -R or -S was given with -q<time>, the effect of -R or -S was ignored,
4302 and queue runs started by the daemon processed all messages. This has
4303 been fixed so that -R and -S can now usefully be given with -q<time>.
4305 PH/40 Import PCRE release 6.7 (fixes some bugs).
4307 PH/41 Add bitwise logical operations to eval (courtesy Brad Jorsch).
4309 PH/42 Give an error if -q is specified more than once.
4311 PH/43 Renamed the variables $interface_address and $interface_port as
4312 $received_ip_address and $received_port, to make it clear that these
4313 values apply to message reception, and not to the outgoing interface when
4314 a message is delivered. (The old names remain recognized, of course.)
4316 PH/44 There was no timeout on the connect() call when using a Unix domain
4317 socket in the ${readsocket expansion. There now is.
4319 PH/45 Applied a modified version of Brad Jorsch's patch to allow "message" to
4320 be meaningful with "accept".
4322 SC/01 Eximstats V1.43
4323 Bug fix for V1.42 with -h0 specified. Spotted by Chris Lear.
4325 SC/02 Eximstats V1.44
4326 Use a glob alias rather than an array ref in the generated
4327 parser. This improves both readability and performance.
4329 SC/03 Eximstats V1.45 (Marco Gaiarin / Steve Campbell)
4330 Collect SpamAssassin and rejection statistics.
4331 Don't display local sender or destination tables unless
4332 there is data to show.
4333 Added average volumes into the top table text output.
4335 SC/04 Eximstats V1.46
4336 Collect data on the number of addresses (recipients)
4337 as well as the number of messages.
4339 SC/05 Eximstats V1.47
4340 Added 'Message too big' to the list of mail rejection
4341 reasons (thanks to Marco Gaiarin).
4343 SC/06 Eximstats V1.48
4344 Mainlog lines which have GMT offsets and are too short to
4345 have a flag are now skipped.
4347 SC/07 Eximstats V1.49 (Alain Williams)
4348 Added the -emptyok flag.
4350 SC/08 Eximstats V1.50
4351 Fixes for obtaining the IP address from reject messages.
4353 JJ/03 exipick.20061117.2, made header handling as similar to exim as possible
4354 (added [br]h_ prefixes, implemented RFC2047 decoding. Fixed
4355 whitespace changes from 4.64-PH/27
4357 JJ/04 exipick.20061117.2, fixed format and added $message_headers_raw to
4360 JJ/05 exipick.20061117.2, bug fixes (error out sooner when invalid criteria
4361 are found, allow negative numbers in numeric criteria)
4363 JJ/06 exipick.20061117.2, added new $message_body_missing variable
4365 JJ/07 exipick.20061117.2, added $received_ip_address and $received_port
4366 to match changes made in 4.64-PH/43
4368 PH/46 Applied Jori Hamalainen's patch to add features to exiqsumm.
4370 PH/47 Put in an explicit test for a DNS lookup of an address record where the
4371 "domain" is actually an IP address, and force a failure. This locks out
4372 those revolvers/nameservers that support "A-for-A" lookups, in
4373 contravention of the specifications.
4375 PH/48 When a host name was looked up from an IP address, and the subsequent
4376 forward lookup of the name timed out, the host name was left in
4377 $sender_host_name, contrary to the specification.
4379 PH/49 Although default lookup types such as lsearch* or cdb*@ have always been
4380 restricted to single-key lookups, Exim was not diagnosing an error if
4381 * or *@ was used with a query-style lookup.
4383 PH/50 Increased the value of DH_BITS in tls-gnu.c from 768 to 1024.
4385 MH/01 local_scan ABI version incremented to 1.1. It should have been updated
4386 long ago, but noone interested enough thought of it. Let's just say that
4387 the "1.1" means that there are some new functions that weren't there at
4388 some point in the past.
4390 PH/51 Error processing for expansion failure of helo_data from an smtp
4391 transport during callout processing was broken.
4393 PH/52 Applied John Jetmore's patch to allow tls-on-connect and STARTTLS to be
4394 tested/used via the -bh/-bhc/-bs options.
4396 PH/53 Added missing "#include <time.h>" to pcre/pcretest.c (this was a PCRE
4397 bug, fixed in subsequent PCRE releases).
4399 PH/54 Applied Robert Bannocks' patch to avoid a problem with references that
4400 arises when using the Solaris LDAP libraries (but not with OpenLDAP).
4402 PH/55 Check for a ridiculously long file name in exim_dbmbuild.
4408 SC/01 Use a glob alias rather than an array ref in eximstats generated
4409 parser. This improves both readability and performance.
4411 SC/02 Collect SpamAssassin and rejection statistics in eximstats.
4412 Don't display local sender or destination tables in eximstats unless
4413 there is data to show.
4414 Added average volumes into the eximstats top table text output.
4416 SC/03 Collect data on the number of addresses (recipients) as well
4417 as the number of messages in eximstats.
4419 TF/01 Correct an error in the documentation for the redirect router. Exim
4420 does (usually) call initgroups() when daemonizing.
4422 TF/02 Call initgroups() when dropping privilege in exim.c, so that Exim runs
4423 with consistent privilege compared to when running as a daemon.
4425 TF/03 Note in the spec that $authenticated_id is not set for local
4426 submissions from trusted users.
4428 TF/04 The ratelimit per_rcpt option now works correctly in acl_not_smtp.
4429 Thanks to Dean Brooks <dean@iglou.com> for the patch.
4431 TF/05 Make it easier to get SMTP authentication and TLS/SSL support working
4432 by adding some example configuration directives to the default
4433 configuration file. A little bit of work is required to uncomment the
4434 directives and define how usernames and passwords are checked, but
4435 there is now a framework to start from.
4437 PH/01 Added #define LDAP_DEPRECATED 1 to ldap.c because some of the "old"
4438 functions that Exim currently uses aren't defined in ldap.h for OpenLDAP
4439 without this. I don't know how relevant this is to other LDAP libraries.
4441 PH/02 Add the verb name to the "unknown ACL verb" error.
4443 PH/03 Magnus Holmgren's patch for filter_prepend_home.
4445 PH/03 Fixed Bugzilla #101: macro definition between ACLs doesn't work.
4447 PH/04 Applied Magnus Holmgren's patch to fix Bugzilla #98: transport's home
4448 directory not expanded when it should be if an expanded home directory
4449 was set for the address (which is overridden by the transport).
4451 PH/05 Applied Alex Kiernan's patch to fix Bugzilla #99: a problem with
4454 PH/06 Added acl_not_smtp_start, based on Johannes Berg's patch, and set the
4455 bit to forbid control=suppress_local_fixups in the acl_not_smtp ACL,
4456 because it is too late at that time, and has no effect.
4458 PH/07 Changed ${quote_pgsql to quote ' as '' instead of \' because of a
4459 security issue with \' (bugzilla #107). I could not use the
4460 PQescapeStringConn() function, because it needs a PGconn value as one of
4463 PH/08 When testing addresses using -bt, indicate those final addresses that
4464 are duplicates that would not cause an additional delivery. At least one
4465 person was confused, thinking that -bt output corresponded to deliveries.
4466 (Suppressing duplicates isn't a good idea as you lose the information
4467 about possibly different redirections that led to the duplicates.)
4469 PH/09 Applied patch from Erik to use select() instead of poll() in spam.c on
4470 systems where poll() doesn't work, in particular OS X.
4472 PH/10 Added more information to debugging output for retry time not reached.
4474 PH/11 Applied patch from Arkadiusz Miskiewicz to apply a timeout to read
4475 operations in malware.c.
4477 PH/12 Applied patch from Magnus Holmgren to include the "h" tag in Domain Keys
4480 PH/13 If write_rejectlog was set false when logging was sent to syslog with
4481 syslog_duplication set false, log lines that would normally be written
4482 both the the main log and to the reject log were not written to syslog at
4485 PH/14 In the default configuration, change the use of "message" in ACL warn
4486 statements to "add_header".
4488 PH/15 Diagnose a filter syntax error for "seen", "unseen", or "noerror" if not
4489 not followed by a command (e.g. "seen endif").
4491 PH/16 Recognize SMTP codes at the start of "message" in ACLs and after :fail:
4492 and :defer: in a redirect router. Add forbid_smtp_code to suppress the
4495 PH/17 Added extra conditions to the default value of delay_warning_condition
4499 { !eq{$h_list-id:$h_list-post:$h_list-subscribe:}{} } \
4500 { match{$h_precedence:}{(?i)bulk|list|junk} } \
4501 { match{$h_auto-submitted:}{(?i)auto-generated|auto-replied} } \
4504 The Auto-Submitted: and various List- headers are standardised, whereas I
4505 don't think Precedence: ever was.
4507 PH/18 Refactored debugging code in route_finduser() to show more information,
4508 in particular, the error code if getpwnam() issues one.
4510 PH/19 Added PQsetClientEncoding(conn, "SQL_ASCII") to the pgsql code module.
4511 This is apparently needed in addition to the PH/07 change above to avoid
4512 any possible encoding problems.
4514 PH/20 Perl can change the locale. Exim was resetting it after a ${perl call,
4515 but not after initializing Perl.
4517 PH/21 Added a call to PQsetNoticeProcessor() to catch pgsql "notices" and
4518 output them only if debugging. By default they are written stderr,
4519 apparently, which is not desirable.
4521 PH/22 Added Alain Williams' LDAP patch to support setting REFERRALS=off on
4524 JJ/01 exipick: added --reverse (and -R synonym), --random, --size, --sort and
4527 JJ/02 exipick: rewrote --help documentation to hopefully make more clear.
4529 PH/23 Made -oMaa and -oMt work with -bh and -bs to pretend the connection is
4530 authenticated or an ident call has been made. Suppress the default
4531 values for $authenticated_id and $authenticated_sender (but permit -oMai
4532 and -oMas) when testing with -bh.
4534 PH/24 Re-jigged the order of the tests in the default configuration so that the
4535 tests for valid domains and recipients precede the DNS black list and CSA
4536 tests, on the grounds that those ones are more expensive.
4538 PH/25 Exim was not testing for a space following SMTP commands such as EHLO
4539 that require one. Thus, EHLORHUBARB was interpreted as a valid command.
4540 This bug exists in every version of Exim that I still have, right back to
4543 PH/26 (n)wildlsearch lookups are documented as being done case-insensitively.
4544 However, an attempt to turn on case-sensitivity in a regex key by
4545 including (?-i) didn't work because the subject string was already
4546 lowercased, and the effects were non-intuitive. It turns out that a
4547 one-line patch can be used to allow (?-i) to work as expected.
4553 TF/01 Fix the add_header change below (4.61 PH/55) which had a bug that (amongst
4554 other effects) broke the use of negated acl sub-conditions.
4556 PH/01 ${readsocket now supports Internet domain sockets (modified John Jetmore
4559 PH/02 When tcp-wrappers is called from Exim, it returns only "deny" or "allow".
4560 "Deny" causes Exim to reject the incoming connection with a 554 error.
4561 Unfortunately, if there is a major crisis, such as a disk failure,
4562 tcp-wrappers gives "deny", whereas what one would like would be some
4563 kind of temporary error. A kludge has been added to help with this.
4564 Before calling hosts_ctl(), errno is set zero. If the result is "deny", a
4565 554 error is used if errno is still zero or contains ENOENT (which occurs
4566 if either of the /etc/hosts.{allow,deny} files is missing). Otherwise, a
4569 PH/03 Add -lutil to the default FreeBSD LIBS setting.
4571 PH/04 Change PH/19 for 4.61 was too wide. It should not be applied to host
4572 errors. Otherwise a message that provokes a temporary error (when other
4573 messages do not) can cause a whole host to time out.
4575 PH/05 Batch deliveries by appendfile and pipe transports did not work when the
4576 addresses were routed directly to files or pipes from a redirect router.
4577 File deliveries just didn't batch; pipe deliveries might have suffered
4580 PH/06 A failure to get a lock for a hints database would erroneously always say
4581 "Failed to get write lock", even when it was really a read lock.
4583 PH/07 The appendfile transport was creating MBX lock files with a fixed mode
4584 of 0600. This has been changed to use the value of the lockfile_mode
4585 option (which defaults to 0600).
4587 PH/08 Applied small patch from the Sieve maintainer.
4589 PH/09 If maildir_quota_directory_regex was set to exclude (say) the .Trash
4590 folder from quota calculations, a direct delivery into this folder messed
4591 up the contents of the maildirsize file. This was because the regex was
4592 used only to exclude .Trash (or whatever) when the size of the mailbox
4593 was calculated. There was no check that a delivery was happening into an
4594 excluded directory. This bug has been fixed by ignoring all quota
4595 processing for deliveries into excluded directories.
4597 PH/10 Added the maildirfolder_create_regex option to appendfile.
4603 PH/01 The code for finding all the local interface addresses on a FreeBSD
4604 system running IPv6 was broken. This may well have applied to all BSD
4605 systems, as well as to others that have similar system calls. The broken
4606 code found IPv4 interfaces correctly, but gave incorrect values for the
4607 IPv6 interfaces. In particular, ::1 was not found. The effect in Exim was
4608 that it would not match correctly against @[] and not recognize the IPv6
4611 PH/02 The ipliteral router was not recognizing addresses of the form user@
4612 [ipv6:....] because it didn't know about the "ipv6:" prefix.
4614 PH/03 Added disable_ipv6.
4616 PH/04 Changed $reply_address to use the raw form of the headers instead of the
4617 decoded form, because it is most often used to construct To: headers
4618 lines in autoreplies, and the decoded form may well be syntactically
4619 invalid. However, $reply_address has leading white space removed, and all
4620 newlines turned into spaces so that the autoreply transport does not
4623 PH/05 If group was specified without a user on a router, and no group or user
4624 was specified on a transport, the group from the router was ignored.
4626 PH/06 Increased the number of ACL variables to 20 of each type, and arranged
4627 for visible compile-time settings that can be used to change these
4628 numbers, for those that want even more. Backwards compatibility with old
4629 spool files has been maintained. However, going back to a previous Exim
4630 release will lost any variables that are in spool files.
4632 PH/07 Two small changes when running in the test harness: increase delay when
4633 passing a TCP/IP connection to a new process, in case the original
4634 process has to generate a bounce, and remove special handling of
4635 127.0.0.2 (sic), which is no longer necessary.
4637 PH/08 Changed debug output of dbfn_open() flags from numbers to names, so as to
4638 be the same on different OS.
4640 PH/09 Moved a debug statement in filter processing to avoid a race problem when
4643 JJ/01 exipick: fixed bug where -b (brief) output option showed "Vars:"
4644 whether --show-vars was specified or not
4646 JJ/02 exipick: Added support for new ACL variable spool format introduced
4649 PH/10 Fixed another bug related to PH/04 above: if an incoming message had a
4650 syntactically invalid From: or Reply-to: line, and a filter used this to
4651 generate an autoreply, and therefore failed to obtain an address for the
4652 autoreply, Exim could try to deliver to a non-existent relative file
4653 name, causing unrelated and misleading errors. What now happens is that
4654 it logs this as a hard delivery error, but does not attempt to create a
4657 PH/11 The exinext utility has a -C option for testing purposes, but although
4658 the given file was scanned by exinext itself; it wasn't being passed on
4659 when Exim was called.
4661 PH/12 In the smtp transport, treat an explicit ECONNRESET error the same as
4662 an end-of-file indication when reading a command response.
4664 PH/13 Domain literals for IPv6 were not recognized unless IPv6 support was
4665 compiled. In many other places in Exim, IPv6 addresses are always
4666 recognized, so I have changed this. It also means that IPv4 domain
4667 literals of the form [IPV4:n.n.n.n] are now always recognized.
4669 PH/14 When a uid/gid is specified for the queryprogram router, it cannot be
4670 used if the router is not running as root, for example, when verifying at
4671 ACL time, or when using -bh. The debugging output from this situation was
4672 non-existent - all you got was a failure to exec. I have made two
4675 (a) Failures to set uid/gid, the current directory, or a process leader
4676 in a subprocess such as that created by queryprogram now generate
4677 suitable debugging output when -d is set.
4679 (b) The queryprogram router detects when it is not running as root,
4680 outputs suitable debugging information if -d is set, and then runs
4681 the subprocess without attempting to change uid/gid.
4683 PH/15 Minor change to Makefile for building test_host (undocumented testing
4686 PH/16 As discussed on the list in Nov/Dec: Exim no longer looks at the
4687 additional section of a DNS packet that returns MX or SRV records.
4688 Instead, it always explicitly searches for A/AAAA records. This avoids
4689 major problems that occur when a DNS server includes only records of one
4690 type (A or AAAA) in an MX/SRV packet. A byproduct of this change has
4691 fixed another bug: if SRV records were looked up and the corresponding
4692 address records were *not* found in the additional section, the port
4693 values from the SRV records were lost.
4695 PH/17 If a delivery to a pipe, file, or autoreply was deferred, Exim was not
4696 using the correct key (the original address) when searching the retry
4697 rules in order to find which one to use for generating the retry hint.
4699 PH/18 If quota_warn_message contains a From: header, Exim now refrains from
4700 adding the default one. Similarly, if it contains a Reply-To: header, the
4701 errors_reply_to option, if set, is not used.
4703 PH/19 When calculating a retry time, Exim used to measure the "time since
4704 failure" by looking at the "first failed" field in the retry record. Now
4705 it does not use this if it is later than than the arrival time of the
4706 message. Instead it uses the arrival time. This makes for better
4707 behaviour in cases where some deliveries succeed, thus re-setting the
4708 "first failed" field. An example is a quota failure for a huge message
4709 when small messages continue to be delivered. Without this change, the
4710 "time since failure" will always be short, possible causing more frequent
4711 delivery attempts for the huge message than are intended.
4712 [Note: This change was subsequently modified - see PH/04 for 4.62.]
4714 PH/20 Added $auth1, $auth2, $auth3 to contain authentication data (as well as
4715 $1, $2, $3) because the numerical variables can be reset during some
4716 expansion items (e.g. "match"), thereby losing the authentication data.
4718 PH/21 Make -bV show the size of off_t variables so that the test suite can
4719 decide whether to run tests for quotas > 2G.
4721 PH/22 Test the values given for quota, quota_filecount, quota_warn_threshold,
4722 mailbox_size, and mailbox_filecount in the appendfile transport. If a
4723 filecount value is greater than 2G or if a quota value is greater than 2G
4724 on a system where the size of off_t is not greater than 4, a panic error
4727 PH/23 When a malformed item such as 1.2.3/24 appears in a host list, it can
4728 never match. The debug and -bh output now contains an explicit error
4729 message indicating a malformed IPv4 address or mask.
4731 PH/24 An host item such as 1.2.3.4/abc was being treated as the IP address
4732 1.2.3.4 without a mask. Now it is not recognized as an IP address, and
4733 PH/23 above applies.
4735 PH/25 Do not write to syslog when running in the test harness. The only
4736 occasion when this arises is a failure to open the main or panic logs
4737 (for which there is an explicit test).
4739 PH/26 Added the /no_tell option to "control=freeze".
4741 PH/27 If a host name lookup failed very early in a connection, for example, if
4742 the IP address matched host_lookup and the reverse lookup yielded a name
4743 that did not have a forward lookup, an error message of the form "no IP
4744 address found for host xxx.xxx.xxx (during SMTP connection from NULL)"
4745 could be logged. Now it outputs the IP address instead of "NULL".
4747 PH/28 An enabling patch from MH: add new function child_open_exim2() which
4748 allows the sender and the authenticated sender to be set when
4749 submitting a message from within Exim. Since child_open_exim() is
4750 documented for local_scan(), the new function should be too.
4752 PH/29 In GnuTLS, a forced expansion failure for tls_privatekey was not being
4753 ignored. In both GnuTLS and OpenSSL, an expansion of tls_privatekey that
4754 results in an empty string is now treated as unset.
4756 PH/30 Fix eximon buffer overflow bug (Bugzilla #73).
4758 PH/31 Added sender_verify_fail logging option.
4760 PH/32 In November 2003, the code in Exim that added an empty Bcc: header when
4761 needed by RFC 822 but not by RFC 2822 was commented out. I have now
4762 tidied the source and removed it altogether.
4764 PH/33 When a queue run was abandoned because the load average was too high, a
4765 log line was always written; now it is written only if the queue_run log
4766 selector is set. In addition, the log line for abandonment now contains
4767 information about the queue run such as the pid. This is always present
4768 in "start" and "stop" lines but was omitted from the "abandon" line.
4770 PH/34 Omit spaces between a header name and the colon in the error message that
4771 is given when verify = headers_syntax fails (if there are lots of them,
4772 the message gets confusing).
4774 PH/35 Change the default for dns_check_names_pattern to allow slashes within
4775 names, as there are now some PTR records that contain slashes. This check
4776 is only to protect against broken name servers that fall over on strange
4777 characters, so the fact that it applies to all lookups doesn't matter.
4779 PH/36 Now that the new test suite is complete, we can remove some of the
4780 special code in Exim that was needed for the old test suite. For example,
4781 sorting DNS records because real resolvers return them in an arbitrary
4782 order. The new test suite's fake resolver always returns records in the
4785 PH/37 When running in the test harness, use -odi for submitted messages (e.g.
4786 bounces) except when queue_only is set, to avoid logging races between
4787 the different processes.
4789 PH/38 Panic-die if .include specifies a non-absolute path.
4791 PH/39 A tweak to the "H" retry rule from its user.
4793 JJ/03 exipick: Removed parentheses from 'next' and 'last' calls that specified
4794 a label. They prevented compilation on older perls.
4796 JJ/04 exipick: Refactored code to prevent implicit split to @_ which caused
4797 a warning to be raised on newish perls.
4799 JJ/05 exipick: Fixed bug where -bpc always showed a count of all messages
4800 on queue. Changes to match documented behaviour of showing count of
4801 messages matching specified criteria.
4803 PH/40 Changed the default ident timeout from 30s to 5s.
4805 PH/41 Added support for the use of login_cap features, on those BSD systems
4806 that have them, for controlling the resources used by pipe deliveries.
4808 PH/42 The content-scanning code uses fopen() to create files in which to put
4809 message data. Previously it was not paying any attention to the mode of
4810 the files. Exim runs with umask(0) because the rest of the code creates
4811 files with open(), and sets the required mode explicitly. Thus, these
4812 files were ending up world-writeable. This was not a big issue, because,
4813 being within the spool directory, they were not world-accessible. I have
4814 created a function called modefopen, which takes an additional mode
4815 argument. It sets umask(777), creates the file, chmods it to the required
4816 mode, then resets the umask. All the relevant calls to fopen() in the
4817 content scanning code have been changed to use this function.
4819 PH/43 If retry_interval_max is set greater than 24 hours, it is quietly reset
4820 to 24 hours. This avoids potential overflow problems when processing G
4821 and H retry rules. I suspect nobody ever tinkers with this value.
4823 PH/44 Added STRIP_COMMAND=/usr/bin/strip to the FreeBSD Makefile.
4825 PH/45 When the plaintext authenticator is running as a client, the server's
4826 challenges are checked to ensure they are valid base64 strings. By
4827 default, the authentication attempt is cancelled if an invalid string is
4828 received. Setting client_ignore_invalid_base64 true ignores these errors.
4829 The decoded challenge strings are now placed in $auth1, $auth2, etc. as
4830 they are received. Thus, the responses can be made to depend on the
4831 challenges. If an invalid string is ignored, an empty string is placed in
4834 PH/46 Messages that are created by the autoreply transport now contains a
4835 References: header, in accordance with RFCs 2822 and 3834.
4837 PH/47 Added authenticated_sender_force to the smtp transport.
4839 PH/48 The ${prvs expansion was broken on systems where time_t was long long.
4841 PH/49 Installed latest patch from the Sieve maintainer.
4843 PH/50 When an Exim quota was set without a file count quota, and mailbox_size
4844 was also set, the appendfile transport was unnecessarily scanning a
4845 directory of message files (e.g. for maildir delivery) to find the count
4846 of files (along with the size), even though it did not need this
4847 information. It now does the scan only if it needs to find either the
4848 size of the count of files.
4850 PH/51 Added ${time_eval: to convert Exim time strings into seconds.
4852 PH/52 Two bugs concerned with error handling when the smtp transport is
4855 (i) Exim was not creating retry information for temporary errors given
4856 for individual recipients after the DATA command when the smtp transport
4857 was used in LMTP mode. This meant that they could be retried too
4858 frequently, and not timed out correctly.
4860 (ii) Exim was setting the flag that allows error details to be returned
4861 for LMTP errors on RCPT commands, but not for LMTP errors for individual
4862 recipients that were returned after the DATA command.
4864 PH/53 This is related to PH/52, but is more general: for any failing address,
4865 when detailed error information was permitted to be returned to the
4866 sender, but the error was temporary, then after the final timeout, only
4867 "retry timeout exceeded" was returned. Now it returns the full error as
4868 well as "retry timeout exceeded".
4870 PH/54 Added control=allow_auth_unadvertised, as it seems there are clients that
4871 do this, and (what is worse) MTAs that accept it.
4873 PH/55 Added the add_header modified to ACLs. The use of "message" with "warn"
4874 will now be deprecated.
4876 PH/56 New os.c-cygwin from the Cygwin maintainer.
4878 JJ/06 exipick: added --unsorted option to allow unsorted output in all output
4879 formats (previously only available in exim formats via -bpr, -bpru,
4880 and -bpra. Now also available in native and exiqgrep formats)
4882 JJ/07 exipick: added --freeze and --thaw options to allow faster interaction
4883 with very large, slow to parse queues
4885 JJ/08 exipick: added ! as generic prefix to negate any criteria format
4887 JJ/09 exipick: miscellaneous performance enhancements (~24% improvements)
4889 PH/57 Tidies in SMTP dialogue display in debug output: (i) It was not showing
4890 responses to authentication challenges, though it was showing the
4891 challenges; (ii) I've removed the CR characters from the debug output for
4894 PH/58 Allow for the insertion of a newline as well as a space when a string
4895 is turned into more than one encoded-word during RFC 2047 encoding. The
4896 Sieve code now uses this.
4898 PH/59 Added the following errors that can be detected in retry rules: mail_4xx,
4899 data_4xx, lost_connection, tls_required.
4901 PH/60 When a VRFY deferred or FAILED, the log message rather than the user
4902 message was being sent as an SMTP response.
4904 PH/61 Add -l and -k options to exicyclog.
4906 PH/62 When verifying, if an address was redirected to one new address, so that
4907 verification continued, and the new address failed or deferred after
4908 having set something in $address_data, the value of $address_data was not
4909 passed back to the ACL. This was different to the case when no
4910 redirection occurred. The value is now passed back in both cases.
4912 PH/63 Changed the macro HAVE_LOGIN_CAP (see PH/41 for this release above) to
4913 HAVE_SETCLASSRESOURCES because there are different APIs in use that all
4914 use login_cap.h, so on its own it isn't the distinguishing feature. The
4915 new name refers directly to the setclassresources() function.
4917 PH/65 Added configuration files for NetBSD3.
4919 PH/66 Updated OS/Makefile-HP-UX for gcc 4.1.0 with HP-UX 11.
4921 PH/67 Fixed minor infelicity in the sorting of addresses to ensure that IPv6
4922 is preferred over IPv4.
4924 PH/68 The bounce_return_message and bounce_return_body options were not being
4925 honoured for bounces generated during the reception of non-SMTP messages.
4926 In particular, this applied to messages rejected by the ACL. This bug has
4927 been fixed. However, if bounce_return_message is true and bounce_return_
4928 body is false, the headers that are returned for a non-SMTP message
4929 include only those that have been read before the error was detected.
4930 (In the case of an ACL rejection, they have all been read.)
4932 PH/69 The HTML version of the specification is now built in a directory called
4933 spec_html instead of spec.html, because the latter looks like a path with
4934 a MIME-type, and this confuses some software.
4936 PH/70 Catch two compiler warnings in sieve.c.
4938 PH/71 Fixed an obscure and subtle bug (thanks Alexander & Matthias). The
4939 function verify_get_ident() calls ip_connect() to connect a socket, but
4940 if the "connect()" function timed out, ip_connect() used to close the
4941 socket. However, verify_get_ident() also closes the socket later, and in
4942 between Exim writes to the log, which may get opened at this point. When
4943 the socket was closed in ip_connect(), the log could get the same file
4944 descriptor number as the socket. This naturally causes chaos. The fix is
4945 not to close the socket in ip_connect(); the socket should be closed by
4946 the function that creates it. There was only one place in the code where
4947 this was missing, in the iplookup router, which I don't think anybody now
4948 uses, but I've fixed it anyway.
4950 PH/72 Make dns_again_means_nonexist apply to lookups using gethostbyname() as
4951 well as to direct DNS lookups. Otherwise the handling of names in host
4952 lists is inconsistent and therefore confusing.
4958 PH/01 Two changes to the default runtime configuration:
4960 (1) Move the checks for relay_from_hosts and authenticated clients from
4961 after to before the (commented out) DNS black list checks.
4963 (2) Add control=submission to the relay_from_hosts and authenticated
4964 clients checks, on the grounds that messages accepted by these
4965 statements are most likely to be submissions.
4967 PH/02 Several tidies to the handling of ${prvs and ${prvscheck:
4969 (1) Generate an error if the third argument for the ${prvs expansion is
4972 (2) Treat a missing third argument of ${prvscheck as if it were an empty
4975 (3) Reset the variables that are obtained from the first argument of
4976 ${prvscheck and used in the second argument before leaving the code,
4977 because their memory is reclaimed, so using them afterwards may do
4980 (4) Tidy up the code for expanding the arguments of ${prvscheck one by
4981 one (it's much easier than Tom thought :-).
4983 (5) Because of (4), we can now allow for the use of $prvscheck_result
4984 inside the third argument.
4986 PH/03 For some reason, the default setting of PATH when running a command from
4987 a pipe transport was just "/usr/bin". I have changed it to
4990 PH/04 SUPPORT_TRANSLATE_IP_ADDRESS and MOVE_FROZEN_MESSAGES did not cause
4991 anything to be listed in the output from -bV.
4993 PH/05 When a filter generated an autoreply, the entire To: header line was
4994 quoted in the delivery log line, like this:
4996 => >A.N.Other <ano@some.domain> <original@ddress> ...
4998 This has been changed so that it extracts the operative address. There
4999 may be more than one such address. If so, they are comma-separated, like
5002 => >ano@some.domain,ona@other.domain <original@ddress> ...
5004 PH/06 When a client host used a correct literal IP address in a HELO or EHLO
5005 command, (for example, EHLO [1.2.3.4]) and the client's IP address was
5006 not being looked up in the rDNS to get a host name, Exim was showing the
5007 IP address twice in Received: lines, even though the IP addresses were
5008 identical. For example:
5010 Received: from [1.2.3.4] (helo=[1.2.3.4])
5012 However, if the real host name was known, it was omitting the HELO data
5013 if it matched the actual IP address. This has been tidied up so that it
5014 doesn't show the same IP address twice.
5016 PH/07 When both +timestamp and +memory debugging was on, the value given by
5017 $tod_xxx expansions could be wrong, because the tod_stamp() function was
5018 called by the debug printing, thereby overwriting the timestamp buffer.
5019 Debugging no longer uses the tod_stamp() function when +timestamp is set.
5021 PH/08 When the original message was included in an autoreply transport, it
5022 always said "this is a copy of the message, including all the headers",
5023 even if body_only or headers_only was set. It now gives an appropriate
5026 PH/09 Applied a patch from the Sieve maintainer which:
5028 o fixes some comments
5029 o adds the (disabled) notify extension core
5030 o adds some debug output for the result of if/elsif tests
5031 o points to the current vacation draft in the documentation
5032 and documents the missing references header update
5036 o fixes a bug in processing the envelope test (when testing
5037 multiple envelope elements, the last element determined the
5040 PH/10 Exim was violating RFC 3834 ("Recommendations for Automatic Responses to
5041 Electronic Mail") by including:
5043 Auto-submitted: auto-generated
5045 in the messages that it generates (bounce messages and others, such as
5046 warnings). In the case of bounce messages for non-SMTP messages, there was
5047 also a typo: it was using "Auto_submitted" (underscore instead of
5048 hyphen). Since every message generated by Exim is necessarily in response
5049 to another message, thes have all been changed to:
5051 Auto-Submitted: auto-replied
5053 in accordance with these statements in the RFC:
5055 The auto-replied keyword:
5057 - SHOULD be used on messages sent in direct response to another
5058 message by an automatic process,
5060 - MUST NOT be used on manually-generated messages,
5062 - MAY be used on Delivery Status Notifications (DSNs) and Message
5063 Disposition Notifications (MDNs),
5065 - MUST NOT be used on messages generated by automatic or periodic
5066 processes, except for messages which are automatic responses to
5069 PH/11 Added "${if def:sender_address {(envelope-from <$sender_address>)\n\t}}"
5070 to the default Received: header definition.
5072 PH/12 Added log selector acl_warn_skipped (default on).
5074 PH/13 After a successful wildlsearch lookup, discard the values of numeric
5075 variables because (a) they are in the wrong storage pool and (b) even if
5076 they were copied, it wouldn't work properly because of the caching.
5078 PH/14 Add check_rfc2047_length to disable enforcement of RFC 2047 length
5079 checking when decoding. Apparently there are clients that generate
5080 overlong encoded strings. Why am I not surprised?
5082 PH/15 If the first argument of "${if match_address" was not empty, but did not
5083 contain an "@" character, Exim crashed. Now it writes a panic log message
5084 and treats the condition as false.
5086 PH/16 In autoreply, treat an empty string for "once" the same as unset.
5088 PH/17 A further patch from the Sieve maintainer: "Introduce the new Sieve
5089 extension "envelope-auth". The code is finished and in agreement with
5090 other implementations, but there is no documentation so far and in fact,
5091 nobody wrote the draft yet. This extension is currently #undef'ed, thus
5092 not changing the active code.
5094 Print executed "if" and "elsif" statements when debugging is used. This
5095 helps a great deal to understand what a filter does.
5097 Document more things not specified clearly in RFC3028. I had all this
5098 sorted out, when out of a sudden new issues came to my mind. Oops."
5100 PH/18 Exim was not recognizing the "net-" search type prefix in match_ip lists
5103 PH/19 Exim expands the IPv6 address given to -bh to its full non-abbreviated
5104 canonical form (as documented). However, after a host name lookup from
5105 the IP address, check_host() was doing a simple string comparison with
5106 addresses acquired from the DNS when checking that the found name did
5107 have the original IP as one of its addresses. Since any found IPv6
5108 addresses are likely to be in abbreviated form, the comparison could
5109 fail. Luckily, there already exists a function for doing the comparison
5110 by converting both addresses to binary, so now that is used instead of
5111 the text comparison.
5113 PH/20 There was another similar case to PH/19, when a complete host name was
5114 given in a host list; looking up its IP address could give an abbreviated
5115 form, whereas the current host's name might or might not be abbreviated.
5116 The same fix has been applied.
5122 PH/01 The ${base62: operator adjusted itself to base 36 when BASE_62 was
5123 set to 36 (for Darwin and Cygwin), but the ${base62d: operator did not.
5126 PH/02 Two minor problems detected in Cygwin: the os.{c,h} files had lost */ on
5127 the CVS lines, and there was a missing #if HAVE_IPV6 in host.c.
5129 PH/03 Typo: missing ".o" in src/pcre/Makefile.
5131 PH/04 Tighten up "personal" tests: Instead of testing for any "List-"
5132 header line, restrict the check to what is listed in RFCs 2369 and 2929.
5133 Also, for "Auto-Submitted", treat anything other than "no" as
5134 non-personal, in accordance with RFC 3834. (Previously it treated
5135 anything starting "auto-" as non-personal.)
5137 TF/01 The control=submission/name=... option had a problem with syntax
5138 errors if the name included a slash character. The /name= option
5139 now slurps the rest of the string, so it can include any characters
5140 but it must come last in the list of options (after /sender_retain
5143 PH/05 Some modifications to the interface to the fake nameserver for the new
5151 TK/01 Added the "success_on_redirect" address verification option. See
5152 NewStuff for rationale and an example.
5154 PH/01 Added support for SQLite, basic code supplied by David Woodhouse.
5156 PH/02 Patch to exigrep to allow it to work on syslog lines.
5158 PH/03 When creating an mbox file for a virus/spam scan, use fseek() instead of
5159 fread() to skip over the body file's header line, because in Cygwin the
5160 header line is locked and is inaccessible.
5162 PH/04 Added $message_exim_id, ultimately to replace $message_id (they will both
5163 co-exist for some time) to make it clear that it is the Exim ID that is
5164 referenced, not the Message-ID: header line.
5166 PH/05 Replaced all Tom's calls to snprintf() with calls to the internal
5167 string_format() function, because snprintf() does not exist on all
5170 PH/06 The use of forbid_filter_existstest now also locks out the use of the
5171 ${stat: expansion item.
5173 PH/07 Changed "SMTP protocol violation: synchronization error" into "SMTP
5174 protocol synchronization error", to keep the pedants happy.
5176 PH/08 Arrange for USE_INET_NTOA_FIX to be set in config.h for AIX systems as
5177 well as for IRIX systems, when gcc is being used. See the host.c source
5180 PH/09 Installed latest Cygwin configuration files from the Cygwin maintainer.
5182 PH/10 Named domain lists were not working if used in a queue_smtp_domains
5185 PH/11 Added support for the IGNOREQUOTA extension to LMTP, both to the lmtp
5186 transport and to the smtp transport in LMTP mode.
5188 TK/02 Remove one case of BASE64 error detection FTTB (undocumented anyway).
5190 PH/12 There was a missing call to search_tidyup() before the fork() in rda.c to
5191 run a filter in a subprocess. This could lead to confusion in subsequent
5192 lookups in the parent process. There should also be a search_tidyup() at
5193 the end of the subprocess.
5195 PH/13 Previously, if "verify = helo" was set in an ACL, the condition was true
5196 only if the host matched helo_try_verify_hosts, which caused the
5197 verification to occur when the EHLO/HELO command was issued. The ACL just
5198 tested the remembered result. Now, if a previous verification attempt has
5199 not happened, "verify = helo" does it there and then.
5201 JJ/01 exipick: added $message_exim_id variable (see 4.53-PH/04)
5203 TK/03 Fix log output including CR from clamd.
5205 PH/14 A reference to $reply_address when Reply-to: was empty and From: did not
5206 exist provoked a memory error which could cause a segfault.
5208 PH/15 Installed PCRE 6.2
5210 PH/17 Defined BIND_8_COMPAT in the Darwin os.h file.
5212 PH/18 Reversed 4.52/PH/17 because the HP-UX user found it wasn't the cause
5213 of the problem. Specifically, suggested +O2 rather than +O1 for the
5216 PH/19 Added sqlite_lock_timeout option (David Woodhouse's patch).
5218 PH/20 If a delivery was routed to a non-standard port by means of an SRV
5219 record, the port was not correctly logged when the outgoing_port log
5220 selector was set (it logged the transort's default port).
5222 PH/21 Added support for host-specific ports to manualroute, queryprogram,
5223 fallback_hosts, and "hosts" in the smtp transport.
5225 PH/22 If the log selector "outgoing_port" is set, the port is now also given on
5226 host errors such as "Connection refused".
5228 PH/23 Applied a patch to fix problems with exim-4.52 while doing radius
5229 authentication with radiusclient 0.4.9:
5231 - Error returned from rc_read_config was caught wrongly
5232 - Username/password not passed on to radius server due to wrong length.
5234 The presumption is that some radiusclient API changes for 4.51/PH/17
5235 were not taken care of correctly. The code is still untested by me (my
5236 Linux distribution still has 0.3.2 of radiusclient), but it was
5237 contributed by a Radius user.
5239 PH/24 When doing a callout, the value of $domain wasn't set correctly when
5240 expanding the "port" option of the smtp transport.
5242 TK/04 MIME ACL: Fix buffer underrun that occurs when EOF condition is met
5243 while reading a MIME header. Thanks to Tom Hughes for a patch.
5245 PH/24 Include config.h inside local_scan.h so that configuration settings are
5248 PH/25 Make $smtp_command_argument available after all SMTP commands. This means
5249 that in an ACL for RCPT (for example), you can examine exactly what was
5252 PH/26 Exim was recognizing IPv6 addresses of the form [IPv6:....] in EHLO
5253 commands, but it was not correctly comparing the address with the actual
5254 client host address. Thus, it would show the EHLO address in Received:
5255 header lines when this was not necessary.
5257 PH/27 Added the % operator to ${eval:}.
5259 PH/28 Exim tries to create and chdir to its spool directory when it starts;
5260 it should be ignoring failures (because with -C, for example, it has lost
5261 privilege). It wasn't ignoring creation failures other than "already
5264 PH/29 Added "crypteq" to the list of supported features that Exim outputs when
5267 PH/30 Fixed (presumably very longstanding) bug in exim_dbmbuild: if it failed
5268 because an input line was too long, either on its own, or by virtue of
5269 too many continuations, the temporary file was not being removed, and the
5270 return code was incorrect.
5272 PH/31 Missing "BOOL" in function definition in filtertest.c.
5274 PH/32 Applied Sieve patches from the maintainer.
5276 TK/05 Domainkeys: Accomodate for a minor API change in libdomainkeys 0.67.
5278 PH/33 Added "verify = not_blind".
5280 PH/34 There are settings for CHOWN_COMMAND and MV_COMMAND that can be used in
5281 Local/Makefile (with some defaults set). These are used in built scripts
5282 such as exicyclog, but they have never been used in the exim_install
5283 script (though there are many overriding facilities there). I have
5284 arranged that the exim_install script now takes note of these two
5287 PH/35 Installed configuration files for Dragonfly.
5289 PH/36 When a locally submitted message by a trusted user did not contain a
5290 From: header, and the sender address was obtained from -f or from an SMTP
5291 MAIL command, and the trusted user did not use -F to supply a sender
5292 name, $originator_name was incorrectly used when constructing a From:
5293 header. Furthermore, $originator_name was used for submission mode
5294 messages from external hosts without From: headers in a similar way,
5295 which is clearly wrong.
5297 PH/37 Added control=suppress_local_fixups.
5299 PH/38 When log_selector = +received_sender was set, and the addition of the
5300 sender made the log line's construction buffer exactly full, or one byte
5301 less than full, an overflow happened when the terminating "\n" was
5304 PH/39 Added a new log selector, "unknown_in_list", which provokes a log entry
5305 when the result of a list match is failure because a DNS lookup failed.
5307 PH/40 RM_COMMAND is now used in the building process.
5309 PH/41 Added a "distclean" target to the top-level Makefile; it deletes all
5310 the "build-* directories that it finds.
5312 PH/42 (But a TF fix): In a domain list, Exim incorrectly matched @[] if the IP
5313 address in a domain literal was a prefix of an interface address.
5315 PH/43 (Again a TF fix): In the dnslookup router, do not apply widen_domains
5316 when verifying a sender address, unless rewrite_headers is false.
5318 PH/44 Wrote a long comment about why errors_to addresses are verified as
5319 recipients, not senders.
5321 TF/01 Add missing LIBS=-lm to OS/Makefile-OpenBSD which was overlooked when
5322 the ratelimit ACL was added.
5324 PH/45 Added $smtp_command for the full command (cf $smtp_command_argument).
5326 PH/46 Added extra information about PostgreSQL errors to the error string.
5328 PH/47 Added an interface to a fake DNS resolver for use by the new test suite,
5329 avoiding the need to install special zones in a real server. This is
5330 backwards compatible; if it can't find the fake resolver, it drops back.
5331 Thus, both old and new test suites can be run.
5333 TF/02 Added util/ratelimit.pl
5335 TF/03 Minor fix to the ratelimit code to improve its behaviour in case the
5336 clock is set back in time.
5338 TF/04 Fix the ratelimit support in exim_fixdb. Patch provided by Brian
5339 Candler <B.Candler@pobox.com>.
5341 TF/05 The fix for PH/43 was not completely correct; widen_domains is always
5342 OK for addresses that are the result of redirections.
5344 PH/48 A number of further additions for the benefit of the new test suite,
5345 including a fake gethostbyname() that interfaces to the fake DNS resolver
5348 TF/06 The fix for widen_domains has also been applied to qualify_single and
5349 search_parents which are the other dnslookup options that can cause
5352 PH/49 Michael Haardt's randomized retrying, but as a separate retry parameter
5355 PH/50 Make never_users, trusted_users, admin_groups, trusted_groups expandable.
5357 TF/07 Exim produced the error message "an SRV record indicated no SMTP
5358 service" if it encountered an MX record with an empty target hostname.
5359 The message is now "an MX or SRV record indicated no SMTP service".
5361 TF/08 Change PH/13 introduced the possibility that verify=helo may defer,
5362 if the DNS of the sending site is misconfigured. This is quite a
5363 common situation. This change restores the behaviour of treating a
5364 helo verification defer as a failure.
5366 PH/51 If self=fail was set on a router, the bounce message did not include the
5367 actual error message.
5373 TF/01 Added support for Client SMTP Authorization. See NewStuff for details.
5375 PH/01 When a transport filter timed out in a pipe delivery, and the pipe
5376 command itself ended in error, the underlying message about the transport
5377 filter timeout was being overwritten with the pipe command error. Now the
5378 underlying error message should be appended to the second error message.
5380 TK/01 Fix poll() being unavailable on Mac OSX 10.2.
5382 PH/02 Reduce the amount of output that "make" produces by default. Full output
5383 can still be requested.
5385 PH/03 The warning log line about a condition test deferring for a "warn" verb
5386 was being output only once per connection, rather than after each
5387 occurrence (because it was using the same function as for successful
5388 "warn" verbs). This seems wrong, so I have changed it.
5390 TF/02 Two buglets in acl.c which caused Exim to read a few bytes of memory that
5391 it should not have, which might have caused a crash in the right
5392 circumstances, but probably never did.
5394 PH/04 Installed a modified version of Tony Finch's patch to make submission
5395 mode fix the return path as well as the Sender: header line, and to
5396 add a /name= option so that you can make the user's friendly name appear
5399 TF/03 Added the control = fakedefer ACL modifier.
5401 TF/04 Added the ratelimit ACL condition. See NewStuff for details. Thanks to
5402 Mark Lowes for thorough testing.
5404 TK/02 Rewrote SPF support to work with libspf2 versions >1.2.0.
5406 TK/03 Merged latest SRS patch from Miles Wilton.
5408 PH/05 There's a shambles in IRIX6 - it defines EX_OK in unistd.h which conflicts
5409 with the definition in sysexits.h (which is #included earlier).
5410 Fortunately, Exim does not actually use EX_OK. The code used to try to
5411 preserve the sysexits.h value, by assuming that macro definitions were
5412 scanned for macro replacements. I have been disabused of this notion,
5413 so now the code just undefines EX_OK before #including unistd.h.
5415 PH/06 There is a timeout for writing blocks of data, set by, e.g. data_timeout
5416 in the smtp transport. When a block could not be written in a single
5417 write() function, the timeout was being re-applied to each part-write.
5418 This seems wrong - if the receiver was accepting one byte at a time it
5419 would take for ever. The timeout is now adjusted when this happens. It
5420 doesn't have to be particularly precise.
5422 TK/04 Added simple SPF lookup method in EXPERIMENTAL_SPF. See NewStuff for
5423 details. Thanks to Chris Webb <chris@arachsys.com> for the patch!
5425 PH/07 Added "fullpostmaster" verify option, which does a check to <postmaster>
5426 without a domain if the check to <postmaster@domain> fails.
5428 SC/01 Eximstats: added -xls and the ability to specify output files
5429 (patch written by Frank Heydlauf).
5431 SC/02 Eximstats: use FileHandles for outputting results.
5433 SC/03 Eximstats: allow any combination of xls, txt, and html output.
5435 SC/04 Eximstats: fixed display of large numbers with -nvr option
5437 SC/05 Eximstats: fixed merging of reports with empty tables.
5439 SC/06 Eximstats: added the -include_original_destination flag
5441 SC/07 Eximstats: removed tabs and trailing whitespace.
5443 TK/05 Malware: Improve on aveserver error handling. Patch from Alex Miller.
5445 TK/06 MBOX spool code: Add real "From " MBOX separator line
5446 so the .eml file is really in mbox format (even though
5447 most programs do not really care). Patch from Alex Miller.
5449 TK/07 MBOX spool code: Add X-Envelope-From: and X-Envelope-To: headers.
5450 The latter is generated from $received_to and is only set if the
5451 message has one envelope recipient. SA can use these headers,
5452 obviously out-of-the-box. Patch from Alex Miller.
5454 PH/08 The ${def test on a variable was returning false if the variable's
5455 value was "0", contrary to what the specification has always said!
5456 The result should be true unless the variable is empty.
5458 PH/09 The syntax error of a character other than { following "${if
5459 def:variable_name" (after optional whitespace) was not being diagnosed.
5460 An expansion such as ${if def:sender_ident:{xxx}{yyy}} in which an
5461 accidental colon was present, for example, could give incorrect results.
5463 PH/10 Tidied the code in a number of places where the st_size field of a stat()
5464 result is used (not including appendfile, where other changes are about
5467 PH/11 Upgraded appendfile so that quotas larger than 2G are now supported.
5468 This involved changing a lot of size variables from int to off_t. It
5469 should work with maildirs and everything.
5471 TK/08 Apply fix provided by Michael Haardt to prevent deadlock in case of
5472 spamd dying while we are connected to it.
5474 TF/05 Fixed a ${extract error message typo reported by Jeremy Harris
5477 PH/12 Applied Alex Kiernan's patch for the API change for the error callback
5478 function for BDB 4.3.
5480 PH/13 Changed auto_thaw such that it does not apply to bounce messages.
5482 PH/14 Imported PCRE 6.0; this was more than just a trivial operation because
5483 the sources for PCRE have been re-arranged and more files are now
5486 PH/15 The code I had for printing potentially long long variables in PH/11
5487 above was not the best (it lost precision). The length of off_t variables
5488 is now inspected at build time, and an appropriate printing format (%ld
5489 or %lld) is chosen and #defined by OFF_T_FMT. We also define LONGLONG_T
5490 to be "long long int" or "long int". This is needed for the internal
5491 formatting function string_vformat().
5493 PH/16 Applied Matthew Newton's patch to exicyclog: "If log_file_path is set in
5494 the configuration file to be ":syslog", then the script "guesses" where
5495 the logs files are, rather than using the compiled in default. In our
5496 case the guess is not the same as the compiled default, so the script
5497 suddenly stopped working when I started to use syslog. The patch checks
5498 to see if log_file_path is "". If so, it attempts to read it from exim
5499 with no configuration file to get the compiled in version, before it
5500 falls back to the previous guessing code."
5502 TK/09 Added "prvs" and "prvscheck" expansion items. These help a lot with
5503 implementing BATV in an Exim configuration. See NewStuff for the gory
5506 PH/17 Applied Michael Haardt's patch for HP-UX, affecting only the os.h and
5507 Makefile that are specific to HP-UX.
5509 PH/18 If the "use_postmaster" option was set for a recipient callout together
5510 with the "random" option, the postmaster address was used as the MAIL
5511 FROM address for the random test, but not for the subsequent recipient
5512 test. It is now used for both.
5514 PH/19 Applied Michael Haardt's patch to update Sieve to RFC3028bis. "The
5515 patch removes a few documentation additions to RFC 3028, because the
5516 latest draft now contains them. It adds the new en;ascii-case comparator
5517 and a new error check for 8bit text in MIME parts. Comparator and
5518 require names are now matched exactly. I enabled the subaddress
5519 extension, but it is not well tested yet (read: it works for me)."
5521 PH/20 Added macros for time_t as for off_t (see PH/15 above) and used them to
5522 rework some of the code of TK/09 above to avoid the hardwired use of
5523 "%lld" and "long long". Replaced the call to snprintf() with a call to
5526 PH/21 Added some other messages to those in 4.51/PH/42, namely "All relevant MX
5527 records point to non-existent hosts", "retry timeout exceeded", and
5528 "retry time not reached for any host after a long failure period".
5530 PH/22 Fixed some oversights/typos causing bugs when Exim is compiled with
5531 experimental DomainKeys support:
5533 (1) The filter variables $n0-$n9 and $sn0-$sn9 were broken.
5534 (2) On an error such as an illegally used "control", the wrong name for
5535 the control was given.
5537 These problems did NOT occur unless DomainKeys support was compiled.
5539 PH/23 Added daemon_startup_retries and daemon_startup_sleep.
5541 PH/24 Added ${if match_ip condition.
5543 PH/25 Put debug statements on either side of calls to EXIM_DBOPEN() for hints
5544 databases so that it will be absolutely obvious if a crash occurs in the
5545 DB library. This is a regular occurrence (often caused by mis-matched
5548 PH/26 Insert a lot of missing (void) casts for functions such as chown(),
5549 chmod(), fcntl(), sscanf(), and other functions from stdio.h. These were
5550 picked up on a user's system that detects such things. There doesn't seem
5551 to be a gcc warning option for this - only an attribute that has to be
5552 put on the function's prototype. It seems that in Fedora Core 4 they have
5553 set this on a number of new functions. No doubt there will be more in due
5556 PH/27 If a dnslookup or manualroute router is set with verify=only, it need not
5557 specify a transport. However, if an address that was verified by such a
5558 router was the subject of a callout, Exim crashed because it tried to
5559 read the rcpt_include_affixes from the non-existent transport. Now it
5560 just assumes that the setting of that option is false. This bug was
5561 introduced by 4.51/PH/31.
5563 PH/28 Changed -d+all to exclude +memory, because that information is very
5564 rarely of interest, but it makes the output a lot bigger. People tend to
5565 do -d+all out of habit.
5567 PH/29 Removed support for the Linux-libc5 build, as it is obsolete and the
5568 code in os-type was giving problems when libc.so lives in lib64, like on
5571 PH/30 Exim's DNS code uses the original T_xxx names for DNS record times. These
5572 aren't the modern standard, and it seems that some systems' include files
5573 don't always have them. Exim was already checking for some of the newer
5574 ones like T_AAAA, and defining it itself. I've added checks for all the
5575 record types that Exim uses.
5577 PH/31 When using GnuTLS, if the parameters cache file did not exist, Exim was
5578 not automatically generating a new one, as it is supposed to. This
5579 prevented TLS from working. If the file did exist, but contained invalid
5580 data, a new version was generated, as expected. It was only the case of a
5581 non-existent file that was broken.
5583 TK/10 Domainkeys: Fix a bug in verification that caused a crash in conjunction
5584 with a change in libdomainkeys > 0.64.
5586 TK/11 Domainkeys: Change the logic how the "testing" policy flag is retrieved
5587 from DNS. If the selector record carries the flag, it now has
5588 precedence over the domain-wide flag.
5590 TK/12 Cleared some compiler warnings related to SPF, SRS and DK code.
5592 PH/32 In mua_wrapper mode, if an smtp transport configuration error (such as
5593 the use of a port name that isn't defined in /etc/services) occurred, the
5594 message was deferred as in a normal delivery, and thus remained on the
5595 spool, instead of being failed because of the mua_wrapper setting. This
5596 is now fixed, and I tidied up some of the mua_wrapper messages at the
5599 SC/08 Eximstats: whilst parsing the mainlog(s), store information about
5600 the messages in a hash of arrays rather than using individual hashes.
5601 This is a bit cleaner and results in dramatic memory savings, albeit
5602 at a slight CPU cost.
5604 SC/09 Eximstats: added the -show_rt<list> and the -show_dt<list> flags
5605 as requested by Marc Sherman.
5607 SC/10 Eximstats: added histograms for user specified patterns as requested
5610 SC/11 Eximstats: v1.43 - bugfix for pattern histograms with -h0 specified.
5612 PH/33 Patch from the Cygwin maintainer to add "b" to all occurences of
5613 fopen() in the content-scanning modules that did not already have it.
5619 TK/01 Added Yahoo DomainKeys support via libdomainkeys. See
5620 doc/experimental-spec.txt for details. (http://domainkeys.sf.net)
5622 TK/02 Fix ACL "control" statement not being available in MIME ACL.
5624 TK/03 Fix ACL "regex" condition not being available in MIME ACL.
5626 PH/01 Installed a patch from the Sieve maintainer that allows -bf to be used
5627 to test Sieve filters that use "vacation".
5629 PH/02 Installed a slightly modified version of Nikos Mavrogiannopoulos' patch
5630 that changes the way the GnuTLS parameters are stored in the cache file.
5631 The new format can be generated externally. For backward compatibility,
5632 if the data in the cache doesn't make sense, Exim assumes it has read an
5633 old-format file, and it generates new data and writes a new file. This
5634 means that you can't go back to an older release without removing the
5637 PH/03 A redirect router that has both "unseen" and "one_time" set does not
5638 work if there are any delivery delays because "one_time" forces the
5639 parent to be marked "delivered", so its unseen clone is never tried
5640 again. For this reason, Exim now forbids the simultaneous setting of
5643 PH/04 Change 4.11/85 fixed an obscure bug concerned with addresses that are
5644 redirected to themselves ("homonym" addresses). Read the long ChangeLog
5645 entry if you want to know the details. The fix, however, neglected to
5646 consider the case when local delivery batching is involved. The test for
5647 "previously delivered" was not happening when checking to see if an
5648 address could be batched with a previous (undelivered) one; under
5649 certain circumstances this could lead to multiple deliveries to the same
5652 PH/05 Renamed the macro SOCKLEN_T as EXIM_SOCKLEN_T because AIX uses SOCKLEN_T
5653 in its include files, and this causes problems building Exim.
5655 PH/06 A number of "verify =" ACL conditions have no options (e.g. verify =
5656 header_syntax) but Exim was just ignoring anything given after a slash.
5657 In particular, this caused confusion with an attempt to use "verify =
5658 reverse_host_lookup/defer_ok". An error is now given when options are
5659 supplied for verify items that do not have them. (Maybe reverse_host_
5660 lookup should have a defer_ok option, but that's a different point.)
5662 PH/07 Increase the size of the buffer for incoming SMTP commands from 512 (as
5663 defined by RFC 821) to 2048, because there were problems with some AUTH
5664 commands, and RFC 1869 says the size should be increased for extended
5665 SMTP commands that take arguments.
5667 PH/08 Added ${dlfunc dynamically loaded function for expansion (code from Tony
5670 PH/09 Previously, an attempt to use ${perl when it wasn't compiled gave an
5671 "unknown" error; now it says that the functionality isn't in the binary.
5673 PH/10 Added a nasty fudge to try to recognize and flatten LDAP passwords in
5674 an address' error message when a string expansion fails (syntax or
5675 whatever). Otherwise the password may appear in the log. Following change
5676 PH/42 below, there is no longer a chance of it appearing in a bounce
5679 PH/11 Installed exipick version 20050225.0 from John Jetmore.
5681 PH/12 If the last host in a fallback_hosts list was multihomed, only the first
5682 of its addresses was ever tried. (Bugzilla bug #2.)
5684 PH/13 If "headers_add" in a transport didn't end in a newline, Exim printed
5685 the result incorrectly in the debug output. (It correctly added a newline
5686 to what was transported.)
5688 TF/01 Added $received_time.
5690 PH/14 Modified the default configuration to add an acl_smtp_data ACL, with
5691 commented out examples of how to interface to a virus scanner and to
5692 SpamAssassin. Also added commented examples of av_scanner and
5693 spamd_address settings.
5695 PH/15 Further to TK/02 and TK/03 above, tidied up the tables of what conditions
5696 and controls are allowed in which ACLs. There were a couple of minor
5697 errors. Some of the entries in the conditions table (which is a table of
5698 where they are NOT allowed) were getting very unwieldy; rewrote them as a
5699 negation of where the condition IS allowed.
5701 PH/16 Installed updated OS/os.c-cygwin from the Cygwin maintainer.
5703 PH/17 The API for radiusclient changed at release 0.4.0. Unfortunately, the
5704 header file does not have a version number, so I've had to invent a new
5705 value for RADIUS_LIB_TYPE, namely "RADIUSCLIENTNEW" to request the new
5706 API. The code is untested by me (my Linux distribution still has 0.3.2 of
5707 radiusclient), but it was contributed by a Radius user.
5709 PH/18 Installed Lars Mainka's patch for the support of CRL collections in
5710 files or directories, for OpenSSL.
5712 PH/19 When an Exim process that is running as root has to create an Exim log
5713 file, it does so in a subprocess that runs as exim:exim so as to get the
5714 ownership right at creation (otherwise, other Exim processes might see
5715 the file with the wrong ownership). There was no test for failure of this
5716 fork() call, which would lead to the process getting stuck as it waited
5717 for a non-existent subprocess. Forks do occasionally fail when resources
5718 run out. I reviewed all the other calls to fork(); they all seem to check
5721 PH/20 When checking for unexpected SMTP input at connect time (before writing
5722 the banner), Exim was not dealing correctly with a non-positive return
5723 from the read() function. If the client had disconnected by this time,
5724 the result was a log entry for a synchronization error with an empty
5725 string after "input=" when read() returned zero. If read() returned -1
5726 (an event I could not check), uninitialized data bytes were printed.
5727 There were reports of junk text (parts of files, etc) appearing after
5730 PH/21 Added acl_not_smtp_mime to allow for MIME scanning for non-SMTP messages.
5732 PH/22 Added support for macro redefinition, and (re)definition in between
5733 driver and ACL definitions.
5735 PH/23 The cyrus_sasl authenticator was expanding server_hostname, but then
5736 forgetting to use the resulting value; it was using the unexpanded value.
5738 PH/24 The cyrus_sasl authenticator was advertising mechanisms for which it
5739 hadn't been configured. The fix is from Juergen Kreileder, who
5740 understands it better than I do:
5742 "Here's what I see happening with three configured cyrus_sasl
5743 authenticators configured (plain, login, cram-md5):
5745 On startup auth_cyrus_sasl_init() gets called for each of these.
5746 This means three calls to sasl_listmech() without a specified mech_list.
5747 => SASL tests which mechs of all available mechs actually work
5748 => three warnings about OTP not working
5749 => the returned list contains: plain, login, cram-md5, digest-md5, ...
5751 With the patch, sasl_listmech() also gets called three times. But now
5752 SASL's mech_list option is set to the server_mech specified in the the
5753 authenticator. Or in other words, the answer from sasl_listmech()
5754 gets limited to just the mech you're testing for (which is different
5756 => the return list contains just 'plain' or 'login', 'cram-md5' or
5757 nothing depending on the value of ob->server_mech.
5759 I've just tested the patch: Authentication still works fine,
5760 unavailable mechs specified in the exim configuration are still
5761 caught, and the auth.log warnings about OTP are gone."
5763 PH/25 When debugging is enabled, the contents of the command line are added
5764 to the debugging output, even when log_selector=+arguments is not
5767 PH/26 Change scripts/os-type so that when "uname -s" returns just "GNU", the
5768 answer is "GNU", and only if the return is "GNU/something" is the answer
5771 PH/27 $acl_verify_message is now set immediately after the failure of a
5772 verification in an ACL, and so is available in subsequent modifiers. In
5773 particular, the message can be preserved by coding like this:
5775 warn !verify = sender
5776 set acl_m0 = $acl_verify_message
5778 Previously, $acl_verify_message was set only while expanding "message"
5779 and "log_message" when a very denied access.
5781 PH/28 Modified OS/os.c-Linux with
5783 -#ifndef OS_LOAD_AVERAGE
5784 +#if !defined(OS_LOAD_AVERAGE) && defined(__linux__)
5786 to make Exim compile on kfreebsd-gnu. (I'm totally confused about the
5787 nomenclature these days.)
5789 PH/29 Installed patch from the Sieve maintainer that adds the options
5790 sieve_useraddress and sieve_subaddress to the redirect router.
5792 PH/30 In these circumstances:
5793 . Two addresses routed to the same list of hosts;
5794 . First host does not offer TLS;
5795 . First host accepts first address;
5796 . First host gives temporary error to second address;
5797 . Second host offers TLS and a TLS session is established;
5798 . Second host accepts second address.
5799 Exim incorrectly logged both deliveries with the TLS parameters (cipher
5800 and peerdn, if requested) that were in fact used only for the second
5803 PH/31 When doing a callout as part of verifying an address, Exim was not paying
5804 attention to any local part prefix or suffix that was matched by the
5805 router that accepted the address. It now behaves in the same way as it
5806 does for delivery: the affixes are removed from the local part unless
5807 rcpt_include_affixes is set on the transport.
5809 PH/32 Add the sender address, as F=<...>, to the log line when logging a
5810 timeout during the DATA phase of an incoming message.
5812 PH/33 Sieve envelope tests were broken for match types other than :is. I have
5813 applied a patch sanctioned by the Sieve maintainer.
5815 PH/34 Change 4.50/80 broke Exim in that it could no longer handle cases where
5816 the uid or gid is negative. A case of a negative gid caused this to be
5817 noticed. The fix allows for either to be negative.
5819 PH/35 ACL_WHERE_MIME is now declared unconditionally, to avoid too much code
5820 clutter, but the tables that are indexed by ACL_WHERE_xxx values had been
5823 PH/36 The change PH/12 above was broken. Fixed it.
5825 PH/37 Exim used to check for duplicate addresses in the middle of routing, on
5826 the grounds that routing the same address twice would always produce the
5827 same answer. This might have been true once, but it is certainly no
5828 longer true now. Routing a child address may depend on the previous
5829 routing that produced that child. Some complicated redirection strategies
5830 went wrong when messages had multiple recipients, and made Exim's
5831 behaviour dependent on the order in which the addresses were given.
5833 I have moved the duplicate checking until after the routing is complete.
5834 Exim scans the addresses that are assigned to local and remote
5835 transports, and removes any duplicates. This means that more work will be
5836 done, as duplicates will always all be routed, but duplicates are
5837 presumably rare, so I don't expect this is of any significance.
5839 For deliveries to pipes, files, and autoreplies, the duplicate checking
5840 still happens during the routing process, since they are not going to be
5843 PH/38 Installed a patch from Ian Freislich, with the agreement of Tom Kistner.
5844 It corrects a timeout issue with spamd. This is Ian's comment: "The
5845 background is that sometimes spamd either never reads data from a
5846 connection it has accepted, or it never writes response data. The exiscan
5847 spam.[ch] uses a 3600 second timeout on spamd socket reads, further, it
5848 blindly assumes that writes won't block so it may never time out."
5850 PH/39 Allow G after quota size as well as K and M.
5852 PH/40 The value set for $authenticated_id in an authenticator may not contain
5853 binary zeroes or newlines because the value is written to log lines and
5854 to spool files. There was no check on this. Now the value is run through
5855 the string_printing() function so that such characters are converted to
5856 printable escape sequences.
5858 PH/41 $message_linecount is a new variable that contains the total number of
5859 lines in the message. Compare $body_linecount, which is the count for the
5862 PH/42 Exim no longer gives details of delivery errors for specific addresses in
5863 bounce and delay warning messages, except in certain special cases, which
5866 (a) An SMTP error message from a remote host;
5867 (b) A message specified in a :fail: redirection;
5868 (c) A message specified in a "fail" command in a system filter;
5869 (d) A message specified in a FAIL return from the queryprogram router;
5870 (e) A message specified by the cannot_route_message router option.
5872 In these cases only, Exim does include the error details in bounce and
5873 warning messages. There are also a few cases where bland messages such
5874 as "unrouteable address" or "local delivery error" are given.
5876 PH/43 $value is now also set for the "else" part of a ${run expansion.
5878 PH/44 Applied patch from the Sieve maintainer: "The vacation draft is still
5879 being worked on, but at least Exim now implements the latest version to
5882 PH/45 In a pipe transport, although a timeout while waiting for the pipe
5883 process to complete was treated as a delivery failure, a timeout while
5884 writing the message to the pipe was logged, but erroneously treated as a
5885 successful delivery. Such timeouts include transport filter timeouts. For
5886 consistency with the overall process timeout, these timeouts are now
5887 treated as errors, giving rise to delivery failures by default. However,
5888 there is now a new Boolean option for the pipe transport called
5889 timeout_defer, which, if set TRUE, converts the failures into defers for
5890 both kinds of timeout. A transport filter timeout is now identified in
5893 PH/46 The "scripts/Configure-config.h" script calls "make" at one point. On
5894 systems where "make" and "gmake" are different, calling "gmake" at top
5895 level broke things. I've arranged for the value of $(MAKE) to be passed
5896 from the Makefile to this script so that it can call the same version of
5900 A note about Exim versions 4.44 and 4.50
5901 ----------------------------------------
5903 Exim 4.50 was meant to be the next release after 4.43. It contains a lot of
5904 changes of various kinds. As a consequence, a big documentation update was
5905 needed. This delayed the release for rather longer than seemed good, especially
5906 in the light of a couple of (minor) security issues. Therefore, the changes
5907 that fixed bugs were backported into 4.43, to create a 4.44 maintenance
5908 release. So 4.44 and 4.50 are in effect two different branches that both start
5911 I have left the 4.50 change log unchanged; it contains all the changes since
5912 4.43. The change log for 4.44 is below; many of its items are identical to
5913 those for 4.50. This seems to be the most sensible way to preserve the
5914 historical information.
5920 1. Minor wording change to the doc/README.SIEVE file.
5922 2. Change 4.43/35 introduced a bug: if quota_filecount was set, the
5923 computation of the current number of files was incorrect.
5925 3. Closing a stable door: arrange to panic-die if setitimer() ever fails. The
5926 bug fixed in 4.43/37 would have been diagnosed quickly if this had been in
5929 4. Give more explanation in the error message when the command for a transport
5930 filter fails to execute.
5932 5. There are several places where Exim runs a non-Exim command in a
5933 subprocess. The SIGUSR1 signal should be disabled for these processes. This
5934 was being done only for the command run by the queryprogram router. It is
5935 now done for all such subprocesses. The other cases are: ${run, transport
5936 filters, and the commands run by the lmtp and pipe transports.
5938 6. Added CONFIGURE_GROUP build-time option.
5940 7. Some older OS have a limit of 256 on the maximum number of file
5941 descriptors. Exim was using setrlimit() to set 1000 as a large value
5942 unlikely to be exceeded. Change 4.43/17 caused a lot of logging on these
5943 systems. I've change it so that if it can't get 1000, it tries for 256.
5945 8. "control=submission" was allowed, but had no effect, in a DATA ACL. This
5946 was an oversight, and furthermore, ever since the addition of extra
5947 controls (e.g. 4.43/32), the checks on when to allow different forms of
5948 "control" were broken. There should now be diagnostics for all cases when a
5949 control that does not make sense is encountered.
5951 9. Added the /retain_sender option to "control=submission".
5953 10. $recipients is now available in the predata ACL (oversight).
5955 11. Tidy the search cache before the fork to do a delivery from a message
5956 received from the command line. Otherwise the child will trigger a lookup
5957 failure and thereby defer the delivery if it tries to use (for example) a
5958 cached ldap connection that the parent has called unbind on.
5960 12. If verify=recipient was followed by verify=sender in a RCPT ACL, the value
5961 of $address_data from the recipient verification was clobbered by the
5962 sender verification.
5964 13. The value of address_data from a sender verification is now available in
5965 $sender_address_data in subsequent conditions in the ACL statement.
5967 14. Added forbid_sieve_filter and forbid_exim_filter to the redirect router.
5969 15. Added a new option "connect=<time>" to callout options, to set a different
5972 16. If FIXED_NEVER_USERS was defined, but empty, Exim was assuming the uid 0
5973 was its contents. (It was OK if the option was not defined at all.)
5975 17. A "Completed" log line is now written for messages that are removed from
5976 the spool by the -Mrm option.
5978 18. New variables $sender_verify_failure and $recipient_verify_failure contain
5979 information about exactly what failed.
5981 19. Added -dd to debug only the daemon process.
5983 20. Incorporated Michael Haardt's patch to ldap.c for improving the way it
5984 handles timeouts, both on the server side and network timeouts. Renamed the
5985 CONNECT parameter as NETTIMEOUT (but kept the old name for compatibility).
5987 21. The rare case of EHLO->STARTTLS->HELO was setting the protocol to "smtp".
5988 It is now set to "smtps".
5990 22. $host_address is now set to the target address during the checking of
5991 ignore_target_hosts.
5993 23. When checking ignore_target_hosts for an ipliteral router, no host name was
5994 being passed; this would have caused $sender_host_name to have been used if
5995 matching the list had actually called for a host name (not very likely,
5996 since this list is usually IP addresses). A host name is now passed as
5999 24. Changed the calls that set up the SIGCHLD handler in the daemon to use the
6000 code that specifies a non-restarting handler (typically sigaction() in
6001 modern systems) in an attempt to fix a rare and obscure crash bug.
6003 25. Narrowed the window for a race in the daemon that could cause it to ignore
6004 SIGCHLD signals. This is not a major problem, because they are used only to
6005 wake it up if nothing else does.
6007 26. A malformed maildirsize file could cause Exim to calculate negative values
6008 for the mailbox size or file count. Odd effects could occur as a result.
6009 The maildirsize information is now recalculated if the size or filecount
6012 27. Added HAVE_SYS_STATVFS_H to the os.h file for Linux, as it has had this
6013 support for a long time. Removed HAVE_SYS_VFS_H.
6015 28. Installed the latest version of exipick from John Jetmore.
6017 29. In an address list, if the pattern was not a regular expression, an empty
6018 subject address (from a bounce message) matched only if the pattern was an
6019 empty string. Non-empty patterns were not even tested. This was the wrong
6020 because it is perfectly reasonable to use an empty address as part of a
6021 database query. An empty address is now tested by patterns that are
6022 lookups. However, all the other forms of pattern expect the subject to
6023 contain a local part and a domain, and therefore, for them, an empty
6024 address still always fails if the pattern is not itself empty.
6026 30. Exim went into a mad DNS loop when attempting to do a callout where the
6027 host was specified on an smtp transport, and looking it up yielded more
6028 than one IP address.
6030 31. Re-factored the code for checking spool and log partition space into a
6031 function that finds that data and another that does the check. The former
6032 is then used to implement four new variables: $spool_space, $log_space,
6033 $spool_inodes, and $log_inodes.
6035 32. The RFC2047 encoding function was originally intended for short strings
6036 such as real names; it was not keeping to the 75-character limit for
6037 encoded words that the RFC imposes. It now respects the limit, and
6038 generates multiple encoded words if necessary. To be on the safe side, I
6039 have increased the buffer size for the ${rfc2047: expansion operator from
6042 33. It is now permitted to omit both strings after an "if" condition; if the
6043 condition is true, the result is "true". As before, when the second string
6044 is omitted, a false condition yields an empty string. This makes it less
6045 cumbersome to write custom ACL and router conditions.
6047 34. Failure to deliver a bounce message always caused it to be frozen, even if
6048 there was an errors_to setting on the router. The errors_to setting is now
6051 35. If an IPv6 address is given for -bh or -bhc, it is now converted to the
6052 canonical form (fully expanded) before being placed in
6053 $sender_host_address.
6055 36. The table in the code that translates DNS record types into text (T_A to
6056 "A" for instance) was missing entries for NS and CNAME. It is just possible
6057 that this could have caused confusion if both these types were looked up
6058 for the same domain, because the text type is used as part of Exim's
6059 per-process caching. But the chance of anyone hitting this buglet seems
6062 37. The dnsdb lookup has been extended in a number of ways.
6064 (1) There is a new type, "zns", which walks up the domain tree until it
6065 finds some nameserver records. It should be used with care.
6067 (2) There is a new type, "mxh", which is like "mx" except that it returns
6068 just the host names, not the priorities.
6070 (3) It is now possible to give a list of domains (or IP addresses) to be
6071 looked up. The behaviour when one of the lookups defers can be
6072 controlled by a keyword.
6074 (4) It is now possible to specify the separator character for use when
6075 multiple records are returned.
6077 38. The dnslists ACL condition has been extended: it is now possible to supply
6078 a list of IP addresses and/or domains to be looked up in a particular DNS
6081 39. Added log_selector=+queue_time_overall.
6083 40. When running the queue in the test harness, wait just a tad after forking a
6084 delivery process, to get repeatability of debugging output.
6086 41. Include certificate and key file names in error message when GnuTLS fails
6087 to set them up, because the GnuTLS error message doesn't include the name
6088 of the failing file when there is a problem reading it.
6090 42. Allow both -bf and -bF in the same test run.
6092 43. Did the same fix as 41 above for OpenSSL, which had the same infelicity.
6094 44. The "Exiscan patch" is now merged into the mainline Exim source.
6096 45. Sometimes the final signoff response after QUIT could fail to get
6097 transmitted in the non-TLS case. Testing !tls_active instead of tls_active
6098 < 0 before doing a fflush(). This bug looks as though it goes back to the
6099 introduction of TLS in release 3.20, but "sometimes" must have been rare
6100 because the tests only now provoked it.
6102 46. Reset the locale to "C" after calling embedded Perl, in case it was changed
6103 (this can affect the format of dates).
6105 47. exim_tidydb, when checking for the continued existence of a message for
6106 which it has found a message-specific retry record, was not finding
6107 messages that were in split spool directories. Consequently, it was
6108 deleting retry records that should have stayed in existence.
6110 48. Steve fixed some bugs in eximstats.
6112 49. The SPA authentication driver was not abandoning authentication and moving
6113 on to the next authenticator when an expansion was forced to fail,
6114 contradicting the general specification for all authenticators. Instead it
6115 was generating a temporary error. It now behaves as specified.
6117 50. The default ordering of permitted cipher suites for GnuTLS was pessimal
6118 (the order specifies the preference for clients). The order is now AES256,
6119 AES128, 3DES, ARCFOUR128.
6121 51. Small patch to Sieve code - explicitly set From: when generating an
6124 52. Exim crashed if a remote delivery caused a very long error message to be
6125 recorded - for instance if somebody sent an entire SpamAssassin report back
6126 as a large number of 550 error lines. This bug was coincidentally fixed by
6127 increasing the size of one of Exim's internal buffers (big_buffer) that
6128 happened as part of the Exiscan merge. However, to be on the safe side, I
6129 have made the code more robust (and fixed the comments that describe what
6132 53. Now that there can be additional text after "Completed" in log lines (if
6133 the queue_time_overall log selector is set), a one-byte patch to exigrep
6134 was needed to allow it to recognize "Completed" as not the last thing in
6137 54. The LDAP lookup was not handling a return of LDAP_RES_SEARCH_REFERENCE. A
6138 patch that reportedly fixes this has been added. I am not expert enough to
6139 create a test for it. This is what the patch creator wrote:
6141 "I found a little strange behaviour of ldap code when working with
6142 Windows 2003 AD Domain, where users was placed in more than one
6143 Organization Units. When I tried to give exim partial DN, the exit code
6144 of ldap_search was unknown to exim because of LDAP_RES_SEARCH_REFERENCE.
6145 But simultaneously result of request was absolutely normal ldap result,
6146 so I produce this patch..."
6148 Later: it seems that not all versions of LDAP support LDAP_RES_SEARCH_
6149 REFERENCE, so I have modified the code to exclude the patch when that macro
6152 55. Some experimental protocols are using DNS PTR records for new purposes. The
6153 keys for these records are domain names, not reversed IP addresses. The
6154 dnsdb PTR lookup now tests whether its key is an IP address. If not, it
6155 leaves it alone. Component reversal etc. now happens only for IP addresses.
6158 56. Improve error message when ldap_search() fails in OpenLDAP or Solaris LDAP.
6160 57. Double the size of the debug message buffer (to 2048) so that more of very
6161 long debug lines gets shown.
6163 58. The exicyclog utility now does better if the number of log files to keep
6164 exceeds 99. In this case, it numbers them 001, 002 ... instead of 01, 02...
6166 59. Two changes related to the smtp_active_hostname option:
6168 (1) $smtp_active_hostname is now available as a variable.
6169 (2) The default for smtp_banner uses $smtp_active_hostname instead
6170 of $primary_hostname.
6172 60. The host_aton() function is supposed to be passed a string that is known
6173 to be a valid IP address. However, in the case of IPv6 addresses, it was
6174 not checking this. This is a hostage to fortune. Exim now panics and dies
6175 if the condition is not met. A case was found where this could be provoked
6176 from a dnsdb PTR lookup with an IPv6 address that had more than 8
6177 components; fortuitously, this particular loophole had already been fixed
6178 by change 4.50/55 above.
6180 If there are any other similar loopholes, the new check in host_aton()
6181 itself should stop them being exploited. The report I received stated that
6182 data on the command line could provoke the exploit when Exim was running as
6183 exim, but did not say which command line option was involved. All I could
6184 find was the use of -be with a bad dnsdb PTR lookup, and in that case it is
6185 running as the user.
6188 61. There was a buffer overflow vulnerability in the SPA authentication code
6189 (which came originally from the Samba project). I have added a test to the
6190 spa_base64_to_bits() function which I hope fixes it.
6193 62. Configuration update for GNU/Hurd and variations. Updated Makefile-GNU and
6194 os.h-GNU, and added configuration files for GNUkFreeBSD and GNUkNetBSD.
6196 63. The daemon start-up calls getloadavg() while still root for those OS that
6197 need the first call to be done as root, but it missed one case: when
6198 deliver_queue_load_max is set with deliver_drop_privilege. This is
6199 necessary for the benefit of the queue runner, because there is no re-exec
6200 when deliver_drop_privilege is set.
6202 64. A call to exiwhat cut short delays set up by "delay" modifiers in ACLs.
6203 This has been fixed.
6205 65. Caching of lookup data for "hosts =" ACL conditions, when a named host list
6206 was in use, was not putting the data itself into the right store pool;
6207 consequently, it could be overwritten for a subsequent message in the same
6208 SMTP connection. (Fix 4.40/11 dealt with the non-cache case, but overlooked
6211 66. Added hosts_max_try_hardlimit to the smtp transport, default 50.
6213 67. The string_is_ip_address() function returns 0, 4, or 6, for "no an IP
6214 address", "IPv4 address", and "IPv6 address", respectively. Some calls of
6215 the function were treating the return as a boolean value, which happened to
6216 work because 0=false and not-0=true, but is not correct code.
6218 68. The host_aton() function was not handling scoped IPv6 addresses (those
6219 with, for example, "%eth0" on the end) correctly.
6221 69. Fixed some compiler warnings in acl.c for the bitmaps specified with
6222 negated items (that is, ~something) in unsigned ints. Some compilers
6223 apparently mutter when there is no cast.
6225 70. If an address verification called from an ACL failed, and did not produce a
6226 user-specific message (i.e. there was only a "system" message), nothing was
6227 put in $acl_verify_message. In this situation, it now puts the system
6230 71. Change 4.23/11 added synchronization checking at the start of an SMTP
6231 session; change 4.31/43 added the unwanted input to the log line - except
6232 that it did not do this in the start of session case. It now does.
6234 72. After a timeout in a callout SMTP session, Exim still sent a QUIT command.
6235 This is wrong and can cause the other end to generate a synchronization
6236 error if it is another Exim or anything else that does the synchronization
6237 check. A QUIT command is no longer sent after a timeout.
6239 73. $host_lookup_deferred has been added, to make it easier to detect DEFERs
6240 during host lookups.
6242 74. The defer_ok option of callout verification was not working if it was used
6243 when verifying addresses in header lines, that is, for this case:
6245 verify = header_sender/callout=defer_ok
6247 75. A backgrounded daemon closed stdin/stdout/stderr on entry; this meant that
6248 those file descriptors could be used for SMTP connections. If anything
6249 wrote to stderr (the example that came up was "warn" in embedded Perl), it
6250 could be sent to the SMTP client, causing chaos. The daemon now opens
6251 stdin, stdout, and stderr to /dev/null when it puts itself into the
6254 76. Arrange for output from Perl's "warn" command to be written to Exim's main
6255 log by default. The user can override this with suitable Perl magic.
6257 77. The use of log_message on a "discard" ACL verb, which is supposed to add to
6258 the log message when discard triggers, was not working for the DATA ACL or
6259 for the non-SMTP ACL.
6261 78. Error message wording change in sieve.c.
6263 79. If smtp_accept_max_per_host was set, the number of connections could be
6264 restricted to fewer than expected, because the daemon was trying to set up
6265 a new connection before checking whether the processes handling previous
6266 connections had finished. The check for completed processes is now done
6267 earlier. On busy systems, this bug wouldn't be noticed because something
6268 else would have woken the daemon, and it would have reaped the completed
6271 80. If a message was submitted locally by a user whose login name contained one
6272 or more spaces (ugh!), the spool file that Exim wrote was not re-readable.
6273 It caused a spool format error. I have fixed the spool reading code. A
6274 related problem was that the "from" clause in the Received: line became
6275 illegal because of the space(s). It is now covered by ${quote_local_part.
6277 81. Included the latest eximstats from Steve (adds average sizes to HTML Top
6280 82. Updated OS/Makefile-AIX as per message from Mike Meredith.
6282 83. Patch from Sieve maintainer to fix unterminated string problem in
6283 "vacation" handling.
6285 84. Some minor changes to the Linux configuration files to help with other
6286 OS variants using glibc.
6288 85. One more patch for Sieve to update vacation handling to latest spec.
6291 ----------------------------------------------------
6292 See the note above about the 4.44 and 4.50 releases.
6293 ----------------------------------------------------
6299 1. Change 4.43/35 introduced a bug that caused file counts to be
6300 incorrectly computed when quota_filecount was set in an appendfile
6303 2. Closing a stable door: arrange to panic-die if setitimer() ever fails. The
6304 bug fixed in 4.43/37 would have been diagnosed quickly if this had been in
6307 3. Give more explanation in the error message when the command for a transport
6308 filter fails to execute.
6310 4. There are several places where Exim runs a non-Exim command in a
6311 subprocess. The SIGUSR1 signal should be disabled for these processes. This
6312 was being done only for the command run by the queryprogram router. It is
6313 now done for all such subprocesses. The other cases are: ${run, transport
6314 filters, and the commands run by the lmtp and pipe transports.
6316 5. Some older OS have a limit of 256 on the maximum number of file
6317 descriptors. Exim was using setrlimit() to set 1000 as a large value
6318 unlikely to be exceeded. Change 4.43/17 caused a lot of logging on these
6319 systems. I've change it so that if it can't get 1000, it tries for 256.
6321 6. "control=submission" was allowed, but had no effect, in a DATA ACL. This
6322 was an oversight, and furthermore, ever since the addition of extra
6323 controls (e.g. 4.43/32), the checks on when to allow different forms of
6324 "control" were broken. There should now be diagnostics for all cases when a
6325 control that does not make sense is encountered.
6327 7. $recipients is now available in the predata ACL (oversight).
6329 8. Tidy the search cache before the fork to do a delivery from a message
6330 received from the command line. Otherwise the child will trigger a lookup
6331 failure and thereby defer the delivery if it tries to use (for example) a
6332 cached ldap connection that the parent has called unbind on.
6334 9. If verify=recipient was followed by verify=sender in a RCPT ACL, the value
6335 of $address_data from the recipient verification was clobbered by the
6336 sender verification.
6338 10. If FIXED_NEVER_USERS was defined, but empty, Exim was assuming the uid 0
6339 was its contents. (It was OK if the option was not defined at all.)
6341 11. A "Completed" log line is now written for messages that are removed from
6342 the spool by the -Mrm option.
6344 12. $host_address is now set to the target address during the checking of
6345 ignore_target_hosts.
6347 13. When checking ignore_target_hosts for an ipliteral router, no host name was
6348 being passed; this would have caused $sender_host_name to have been used if
6349 matching the list had actually called for a host name (not very likely,
6350 since this list is usually IP addresses). A host name is now passed as
6353 14. Changed the calls that set up the SIGCHLD handler in the daemon to use the
6354 code that specifies a non-restarting handler (typically sigaction() in
6355 modern systems) in an attempt to fix a rare and obscure crash bug.
6357 15. Narrowed the window for a race in the daemon that could cause it to ignore
6358 SIGCHLD signals. This is not a major problem, because they are used only to
6359 wake it up if nothing else does.
6361 16. A malformed maildirsize file could cause Exim to calculate negative values
6362 for the mailbox size or file count. Odd effects could occur as a result.
6363 The maildirsize information is now recalculated if the size or filecount
6366 17. Added HAVE_SYS_STATVFS_H to the os.h file for Linux, as it has had this
6367 support for a long time. Removed HAVE_SYS_VFS_H.
6369 18. Updated exipick to current release from John Jetmore.
6371 19. Allow an empty sender to be matched against a lookup in an address list.
6372 Previously the only cases considered were a regular expression, or an
6375 20. Exim went into a mad DNS lookup loop when doing a callout where the
6376 host was specified on the transport, if the DNS lookup yielded more than
6379 21. The RFC2047 encoding function was originally intended for short strings
6380 such as real names; it was not keeping to the 75-character limit for
6381 encoded words that the RFC imposes. It now respects the limit, and
6382 generates multiple encoded words if necessary. To be on the safe side, I
6383 have increased the buffer size for the ${rfc2047: expansion operator from
6386 22. Failure to deliver a bounce message always caused it to be frozen, even if
6387 there was an errors_to setting on the router. The errors_to setting is now
6390 23. If an IPv6 address is given for -bh or -bhc, it is now converted to the
6391 canonical form (fully expanded) before being placed in
6392 $sender_host_address.
6394 24. Updated eximstats to version 1.33
6396 25. Include certificate and key file names in error message when GnuTLS fails
6397 to set them up, because the GnuTLS error message doesn't include the name
6398 of the failing file when there is a problem reading it.
6400 26. Expand error message when OpenSSL has problems setting up cert/key files.
6403 27. Reset the locale to "C" after calling embedded Perl, in case it was changed
6404 (this can affect the format of dates).
6406 28. exim_tidydb, when checking for the continued existence of a message for
6407 which it has found a message-specific retry record, was not finding
6408 messages that were in split spool directories. Consequently, it was
6409 deleting retry records that should have stayed in existence.
6411 29. eximstats updated to version 1.35
6412 1.34 - allow eximstats to parse syslog lines as well as mainlog lines
6413 1.35 - bugfix such that pie charts by volume are generated correctly
6415 30. The SPA authentication driver was not abandoning authentication and moving
6416 on to the next authenticator when an expansion was forced to fail,
6417 contradicting the general specification for all authenticators. Instead it
6418 was generating a temporary error. It now behaves as specified.
6420 31. The default ordering of permitted cipher suites for GnuTLS was pessimal
6421 (the order specifies the preference for clients). The order is now AES256,
6422 AES128, 3DES, ARCFOUR128.
6424 31. Small patch to Sieve code - explicitly set From: when generating an
6427 32. Exim crashed if a remote delivery caused a very long error message to be
6428 recorded - for instance if somebody sent an entire SpamAssassin report back
6429 as a large number of 550 error lines. This bug was coincidentally fixed by
6430 increasing the size of one of Exim's internal buffers (big_buffer) that
6431 happened as part of the Exiscan merge. However, to be on the safe side, I
6432 have made the code more robust (and fixed the comments that describe what
6435 33. Some experimental protocols are using DNS PTR records for new purposes. The
6436 keys for these records are domain names, not reversed IP addresses. The
6437 dnsdb PTR lookup now tests whether its key is an IP address. If not, it
6438 leaves it alone. Component reversal etc. now happens only for IP addresses.
6441 34. The host_aton() function is supposed to be passed a string that is known
6442 to be a valid IP address. However, in the case of IPv6 addresses, it was
6443 not checking this. This is a hostage to fortune. Exim now panics and dies
6444 if the condition is not met. A case was found where this could be provoked
6445 from a dnsdb PTR lookup with an IPv6 address that had more than 8
6446 components; fortuitously, this particular loophole had already been fixed
6447 by change 4.50/55 or 4.44/33 above.
6449 If there are any other similar loopholes, the new check in host_aton()
6450 itself should stop them being exploited. The report I received stated that
6451 data on the command line could provoke the exploit when Exim was running as
6452 exim, but did not say which command line option was involved. All I could
6453 find was the use of -be with a bad dnsdb PTR lookup, and in that case it is
6454 running as the user.
6457 35. There was a buffer overflow vulnerability in the SPA authentication code
6458 (which came originally from the Samba project). I have added a test to the
6459 spa_base64_to_bits() function which I hope fixes it.
6462 36. The daemon start-up calls getloadavg() while still root for those OS that
6463 need the first call to be done as root, but it missed one case: when
6464 deliver_queue_load_max is set with deliver_drop_privilege. This is
6465 necessary for the benefit of the queue runner, because there is no re-exec
6466 when deliver_drop_privilege is set.
6468 37. Caching of lookup data for "hosts =" ACL conditions, when a named host list
6469 was in use, was not putting the data itself into the right store pool;
6470 consequently, it could be overwritten for a subsequent message in the same
6471 SMTP connection. (Fix 4.40/11 dealt with the non-cache case, but overlooked
6474 38. Sometimes the final signoff response after QUIT could fail to get
6475 transmitted in the non-TLS case. Testing !tls_active instead of tls_active
6476 < 0 before doing a fflush(). This bug looks as though it goes back to the
6477 introduction of TLS in release 3.20, but "sometimes" must have been rare
6478 because the tests only now provoked it.
6484 1. Fixed a longstanding but relatively impotent bug: a long time ago, before
6485 PIPELINING, the function smtp_write_command() used to return TRUE or FALSE.
6486 Now it returns an integer. A number of calls were still expecting a T/F
6487 return. Fortuitously, in all cases, the tests worked in OK situations,
6488 which is the norm. However, things would have gone wrong on any write
6489 failures on the smtp file descriptor. This function is used when sending
6490 messages over SMTP and also when doing verify callouts.
6492 2. When Exim is called to do synchronous delivery of a locally submitted
6493 message (the -odf or -odi options), it no longer closes stderr before doing
6496 3. Implemented the mua_wrapper option.
6498 4. Implemented mx_fail_domains and srv_fail_domains for the dnslookup router.
6500 5. Implemented the functions header_remove(), header_testname(),
6501 header_add_at_position(), and receive_remove_recipient(), and exported them
6504 6. If an ACL "warn" statement specified the addition of headers, Exim already
6505 inserted X-ACL-Warn: at the start if there was no header name. However, it
6506 was not making this test for the second and subsequent header lines if
6507 there were newlines in the string. This meant that an invalid header could
6508 be inserted if Exim was badly configured.
6510 7. Allow an ACL "warn" statement to add header lines at the start or after all
6511 the Received: headers, as well as at the end.
6513 8. Added the rcpt_4xx retry error code.
6515 9. Added postmaster_mailfrom=xxx to callout verification option.
6517 10. Added mailfrom=xxxx to the callout verification option, for verify=
6520 11. ${substr_1_:xxxx} and ${substr__3:xxxx} are now diagnosed as syntax errors
6521 (they previously behaved as ${substr_1_0:xxxx} and ${substr:_0_3:xxxx}).
6523 12. Inserted some casts to stop certain compilers warning when using pointer
6524 differences as field lengths or precisions in printf-type calls (mostly
6525 affecting debugging statements).
6527 13. Added optional readline() support for -be (dynamically loaded).
6529 14. Obscure bug fix: if a message error (e.g. 4xx to MAIL) happened within the
6530 same clock tick as a message's arrival, so that its received time was the
6531 same as the "first fail" time on the retry record, and that message
6532 remained on the queue past the ultimate address timeout, every queue runner
6533 would try a delivery (because it was past the ultimate address timeout) but
6534 after another failure, the ultimate address timeout, which should have then
6535 bounced the address, did not kick in. This was a "< instead of <=" error;
6536 in most cases the first failure would have been in the next clock tick
6537 after the received time, and all would be well.
6539 15. The special items beginning with @ in domain lists (e.g. @mx_any) were not
6540 being recognized when the domain list was tested by the match_domain
6541 condition in an expansion string.
6543 16. Added the ${str2b64: operator.
6545 17. Exim was always calling setrlimit() to set a large limit for the number of
6546 processes, without checking whether the existing limit was already
6547 adequate. (It did check for the limit on file descriptors.) Furthermore,
6548 errors from getrlimit() and setrlimit() were being ignored. Now they are
6549 logged to the main and panic logs, but Exim does carry on, to try to do its
6550 job under whatever limits there are.
6552 18. Imported PCRE 5.0.
6554 19. Trivial typo in log message " temporarily refused connection" (the leading
6557 20. If the log selector return_path_on_delivery was set and an address was
6558 redirected to /dev/null, the delivery process crashed because it assumed
6559 that a return path would always be set for a "successful" delivery. In this
6560 case, the whole delivery is bypassed as an optimization, and therefore no
6563 21. Internal re-arrangement: the function for sending a challenge and reading
6564 a response while authentication was assuming a zero-terminated challenge
6565 string. It's now changed to take a pointer and a length, to allow for
6566 binary data in such strings.
6568 22. Added the cyrus_sasl authenticator (code supplied by MBM).
6570 23. Exim was not respecting finduser_retries when seeking the login of the
6571 uid under which it was called; it was always trying 10 times. (The default
6572 setting of finduser_retries is zero.) Also, it was sleeping after the final
6573 failure, which is pointless.
6575 24. Implemented tls_on_connect_ports.
6577 25. Implemented acl_smtp_predata.
6579 26. If the domain in control=submission is set empty, Exim assumes that the
6580 authenticated id is a complete email address when it generates From: or
6581 Sender: header lines.
6583 27. Added "#define SOCKLEN_T int" to OS/os.h-SCO and OS/os.h-SCO_SV. Also added
6584 definitions to OS/Makefile-SCO and OS/Makefile-SCO_SV that put basename,
6585 chown and chgrp in /bin and hostname in /usr/bin.
6587 28. Exim was keeping the "process log" file open after each use, just as it
6588 does for the main log. This opens the possibility of it remaining open for
6589 long periods when the USR1 signal hits a daemon. Occasional processlog
6590 errors were reported, that could have been caused by this. Anyway, it seems
6591 much more sensible not to leave this file open at all, so that is what now
6594 29. The long-running daemon process does not normally write to the log once it
6595 has entered its main loop, and it closes the log before doing so. This is
6596 so that log files can straightforwardly be renamed and moved. However,
6597 there are a couple of unusual error situations where the daemon does write
6598 log entries, and I had neglected to close the log afterwards.
6600 30. The text of an SMTP error response that was received during a remote
6601 delivery was being truncated at 512 bytes. This is too short for some of
6602 the long messages that one sometimes sees. I've increased the limit to
6605 31. It is now possible to make retry rules that apply only when a message has a
6606 specific sender, in particular, an empty sender.
6608 32. Added "control = enforce_sync" and "control = no_enforce_sync". This makes
6609 it possible to be selective about when SMTP synchronization is enforced.
6611 33. Added "control = caseful_local_part" and "control = "caselower_local_part".
6613 32. Implemented hosts_connection_nolog.
6615 33. Added an ACL for QUIT.
6617 34. Setting "delay_warning=" to disable warnings was not working; it gave a
6620 35. Added mailbox_size and mailbox_filecount to appendfile.
6622 36. Added control = no_multiline_responses to ACLs.
6624 37. There was a bug in the logic of the code that waits for the clock to tick
6625 in the case where the clock went backwards by a substantial amount such
6626 that the microsecond fraction of "now" was more than the microsecond
6627 fraction of "then" (but the whole seconds number was less).
6629 38. Added support for the libradius Radius client library this is found on
6630 FreeBSD (previously only the radiusclient library was supported).
6636 1. When certain lookups returned multiple values in the form name=value, the
6637 quoting of the values was not always being done properly. Specifically:
6638 (a) If the value started with a double quote, but contained no whitespace,
6640 (b) If the value contained whitespace other than a space character (i.e.
6641 tabs or newlines or carriage returns) it was not quoted.
6642 This fix has been applied to the mysql and pgsql lookups by writing a
6643 separate quoting function and calling it from the lookup code. The fix
6644 should probably also be applied to nisplus, ibase and oracle lookups, but
6645 since I cannot test any of those, I have not disturbed their existing code.
6647 2. A hit in the callout cache for a specific address caused a log line with no
6648 reason for rejecting RCPT. Now it says "Previous (cached) callout
6649 verification failure".
6651 3. There was an off-by-one bug in the queryprogram router. An over-long
6652 return line was truncated at 256 instead of 255 characters, thereby
6653 overflowing its buffer with the terminating zero. As well as fixing this, I
6654 have increased the buffer size to 1024 (and made a note to document this).
6656 4. If an interrupt, such as the USR1 signal that is send by exiwhat, arrives
6657 when Exim is waiting for an SMTP response from a remote server, Exim
6658 restarts its select() call on the socket, thereby resetting its timeout.
6659 This is not a problem when such interrupts are rare. Somebody set up a cron
6660 job to run exiwhat every 2 minutes, which is less than the normal select()
6661 timeout (5 or 10 minutes). This meant that the select() timeout never
6662 kicked in because it was always reset. I have fixed this by comparing the
6663 time when an interrupt arrives with the time at the start of the first call
6664 to select(). If more time than the timeout has elapsed, the interrupt is
6665 treated as a timeout.
6667 5. Some internal re-factoring in preparation for the addition of Sieve
6668 extensions (by MH). In particular, the "personal" test is moved to a
6669 separate function, and given an option for scanning Cc: and Bcc: (which is
6670 not set for Exim filters).
6672 6. When Exim created an email address using the login of the caller as the
6673 local part (e.g. when creating a From: or Sender: header line), it was not
6674 quoting the local part when it contained special characters such as @.
6676 7. Installed new OpenBSD configuration files.
6678 8. Reworded some messages for syntax errors in "and" and "or" conditions to
6679 try to make them clearer.
6681 9. Callout options, other than the timeout value, were being ignored when
6682 verifying sender addresses in header lines. For example, when using
6684 verify = header_sender/callout=no_cache
6686 the cache was (incorrectly) being used.
6688 10. Added a missing instance of ${EXE} to the exim_install script; this affects
6689 only the Cygwin environment.
6691 11. When return_path_on_delivery was set as a log selector, if different remote
6692 addresses in the same message used different return paths and parallel
6693 remote delivery occurred, the wrong values would sometimes be logged.
6694 (Whenever a remote delivery process finished, the return path value from
6695 the most recently started remote delivery process was logged.)
6697 12. RFC 3848 specifies standard names for the "with" phrase in Received: header
6698 lines when AUTH and/or TLS are in use. This is the "received protocol"
6699 field. Exim used to use "asmtp" for authenticated SMTP, without any
6700 indication (in the protocol name) for TLS use. Now it follows the RFC and
6701 uses "esmtpa" if the connection is authenticated, "esmtps" if it is
6702 encrypted, and "esmtpsa" if it is both encrypted and authenticated. These
6703 names appear in log lines as well as in Received: header lines.
6705 13. Installed MH's patches for Sieve to add the "copy" and "vacation"
6706 extensions, and comparison tests, and to fix some bugs.
6708 14. Changes to the "personal" filter test:
6710 (1) The test was buggy in that it was just doing the equivalent of
6711 "contains" tests on header lines. For example, if a user's address was
6712 anne@some.where, the "personal" test would incorrectly be true for
6714 To: susanne@some.where
6716 This test is now done by extracting each address from the header in turn,
6717 and checking the entire address. Other tests that are part of "personal"
6718 are now done using regular expressions (for example, to check local parts
6719 of addresses in From: header lines).
6721 (2) The list of non-personal local parts in From: addresses has been
6722 extended to include "listserv", "majordomo", "*-request", and "owner-*",
6723 taken from the Sieve specification recommendations.
6725 (3) If the message contains any header line starting with "List-" it is
6726 treated as non-personal.
6728 (4) The test for "circular" in the Subject: header line has been removed
6729 because it now seems ill-conceived.
6731 15. Minor typos in src/EDITME comments corrected.
6733 16. Installed latest exipick from John Jetmore.
6735 17. If headers_add on a router specified a text string that was too long for
6736 string_sprintf() - that is, longer than 8192 bytes - Exim panicked. The use
6737 of string_sprintf() is now avoided.
6739 18. $message_body_size was not set (it was always zero) when running the DATA
6740 ACL and the local_scan() function.
6742 19. For the "mail" command in an Exim filter, no default was being set for
6743 the once_repeat time, causing a random time value to be used if "once" was
6744 specified. (If the value happened to be <= 0, no repeat happened.) The
6745 default is now 0s, meaning "never repeat". The "vacation" command was OK
6746 (its default is 7d). It's somewhat surprising nobody ever noticed this bug
6747 (I found it when inspecting the code).
6749 20. There is now an overall timeout for performing a callout verification. It
6750 defaults to 4 times the callout timeout, which applies to individual SMTP
6751 commands during the callout. The overall timeout applies when there is more
6752 than one host that can be tried. The timeout is checked before trying the
6753 next host. This prevents very long delays if there are a large number of
6754 hosts and all are timing out (e.g. when the network connections are timing
6755 out). The value of the overall timeout can be changed by specifying an
6756 additional sub-option for "callout", called "maxwait". For example:
6758 verify = sender/callout=5s,maxwait=20s
6760 21. Add O_APPEND to the open() call for maildirsize files (Exim already seeks
6761 to the end before writing, but this should make it even safer).
6763 22. Exim was forgetting that it had advertised PIPELINING for the second and
6764 subsequent messages on an SMTP connection. It was also not resetting its
6765 memory on STARTTLS and an internal HELO.
6767 23. When Exim logs an SMTP synchronization error within a session, it now
6768 records whether PIPELINING has been advertised or not.
6770 24. Added 3 instances of "(long int)" casts to time_t variables that were being
6771 formatted using %ld, because on OpenBSD (and perhaps others), time_t is int
6772 rather than long int.
6774 25. Installed the latest Cygwin configuration files from the Cygwin maintainer.
6776 26. Added the never_mail option to autoreply.
6782 1. A reorganization of the code in order to implement 4.40/8 caused a daemon
6783 crash if the getsockname() call failed; this can happen if a connection is
6784 closed very soon after it is established. The problem was simply in the
6785 order in which certain operations were done, causing Exim to try to write
6786 to the SMTP stream before it had set up the file descriptor. The bug has
6787 been fixed by making things happen in the correct order.
6793 1. If "drop" was used in a DATA ACL, the SMTP output buffer was not flushed
6794 before the connection was closed, thus losing the rejection response.
6796 2. Commented out the definition of SOCKLEN_T in os.h-SunOS5. It is needed for
6797 some early Solaris releases, but causes trouble in current releases where
6798 socklen_t is defined.
6800 3. When std{in,out,err} are closed, re-open them to /dev/null so that they
6803 4. Minor refactoring of os.c-Linux to avoid compiler warning when IPv6 is not
6806 5. Refactoring in expand.c to improve memory usage. Pre-allocate a block so
6807 that releasing the top of it at the end releases what was used for sub-
6808 expansions (unless the block got too big). However, discard this block if
6809 the first thing is a variable or header, so that we can use its block when
6810 it is dynamic (useful for very large $message_headers, for example).
6812 6. Lookups now cache *every* query, not just the most recent. A new, separate
6813 store pool is used for this. It can be recovered when all lookup caches are
6814 flushed. Lookups now release memory at the end of their result strings.
6815 This has involved some general refactoring of the lookup sources.
6817 7. Some code has been added to the store_xxx() functions to reduce the amount
6818 of flapping under certain conditions.
6820 8. log_incoming_interface used to affect only the <= reception log lines. Now
6821 it causes the local interface and port to be added to several more SMTP log
6822 lines, for example "SMTP connection from", and rejection lines.
6824 9. The Sieve author supplied some patches for the doc/README.SIEVE file.
6826 10. Added a conditional definition of _BSD_SOCKLEN_T to os.h-Darwin.
6828 11. If $host_data was set by virtue of a hosts lookup in an ACL, its value
6829 could be overwritten at the end of the current message (or the start of a
6830 new message if it was set in a HELO ACL). The value is now preserved for
6831 the duration of the SMTP connection.
6833 12. If a transport had a headers_rewrite setting, and a matching header line
6834 contained an unqualified address, that address was qualified, even if it
6835 did not match any rewriting rules. The underlying bug was that the values
6836 of the flags that permit the existence of unqualified sender and recipient
6837 addresses in header lines (set by {sender,recipient}_unqualified_hosts for
6838 non-local messages, and by -bnq for local messages) were not being
6839 preserved with the message after it was received.
6841 13. When Exim was logging an SMTP synchronization error, it could sometimes log
6842 "next input=" as part of the text comprising the host identity instead of
6843 the correct text. The code was using the same buffer for two different
6844 strings. However, depending on which order the printing function evaluated
6845 its arguments, the bug did not always show up. Under Linux, for example, my
6846 test suite worked just fine.
6848 14. Exigrep contained a use of Perl's "our" scoping after change 4.31/70. This
6849 doesn't work with some older versions of Perl. It has been changed to "my",
6850 which in any case is probably the better facility to use.
6852 15. A really picky compiler found some instances of statements for creating
6853 error messages that either had too many or two few arguments for the format
6856 16. The size of the buffer for calls to the DNS resolver has been increased
6857 from 1024 to 2048. A larger buffer is needed when performing PTR lookups
6858 for addresses that have a lot of PTR records. This alleviates a problem; it
6859 does not fully solve it.
6861 17. A dnsdb lookup for PTR records that receives more data than will fit in the
6862 buffer now truncates the list and logs the incident, which is the same
6863 action as happens when Exim is looking up a host name and its aliases.
6864 Previously in this situation something unpredictable would happen;
6865 sometimes it was "internal error: store_reset failed".
6867 18. If a server dropped the connection unexpectedly when an Exim client was
6868 using GnuTLS and trying to read a response, the client delivery process
6869 crashed while trying to generate an error log message.
6871 19. If a "warn" verb in an ACL added multiple headers to a message in a single
6872 string, for example:
6874 warn message = H1: something\nH2: something
6876 the text was added as a single header line from Exim's point of view
6877 though it ended up OK in the delivered message. However, searching for the
6878 second and subsequent header lines using $h_h2: did not work. This has been
6879 fixed. Similarly, if a system filter added multiple headers in this way,
6880 the routers could not see them.
6882 20. Expanded the error message when iplsearch is called with an invalid key to
6883 suggest using net-iplsearch in a host list.
6885 21. When running tests using -bh, any delays imposed by "delay" modifiers in
6886 ACLs are no longer actually imposed (and a message to that effect is
6889 22. If a "gecos" field in a passwd entry contained escaped characters, in
6890 particular, if it contained a \" sequence, Exim got it wrong when building
6891 a From: or a Sender: header from that name. A second bug also caused
6892 incorrect handling when an unquoted " was present following a character
6893 that needed quoting.
6895 23. "{crypt}" as a password encryption mechanism for a "crypteq" expansion item
6896 was not being matched caselessly.
6898 24. Arranged for all hyphens in the exim.8 source to be escaped with
6901 25. Change 16 of 4.32, which reversed 71 or 4.31 didn't quite do the job
6902 properly. Recipient callout cache records were still being keyed to include
6903 the sender, even when use_sender was set false. This led to far more
6904 callouts that were necessary. The sender is no longer included in the key
6905 when use_sender is false.
6907 26. Added "control = submission" modifier to ACLs.
6909 27. Added the ${base62d: operator to decode base 62 numbers.
6911 28. dnsdb lookups can now access SRV records.
6913 29. CONFIGURE_OWNER can be set at build time to define an alternative owner for
6914 the configuration file.
6916 30. The debug message "delivering xxxxxx-xxxxxx-xx" is now output in verbose
6917 (-v) mode. This makes the output for a verbose queue run more intelligible.
6919 31. Added a use_postmaster feature to recipient callouts.
6921 32. Added the $body_zerocount variable, containing the number of binary zero
6922 bytes in the message body.
6924 33. The time of last modification of the "new" subdirectory is now used as the
6925 "mailbox time last read" when there is a quota error for a maildir
6928 34. Added string comparison operators lt, lti, le, lei, gt, gti, ge, gei.
6930 35. Added +ignore_unknown as a special item in host lists.
6932 36. Code for decoding IPv6 addresses in host lists is now included, even if
6933 IPv6 support is not being compiled. This fixes a bug in which an IPv6
6934 address was recognized as an IP address, but was then not correctly decoded
6935 into binary, causing unexpected and incorrect effects when compared with
6942 1. Very minor rewording of debugging text in manualroute to say "list of
6943 hosts" instead of "hostlist".
6945 2. If verify=header_syntax was set, and a header line with an unqualified
6946 address (no domain) and a large number of spaces between the end of the
6947 name and the colon was received, the reception process suffered a buffer
6948 overflow, and (when I tested it) crashed. This was caused by some obsolete
6949 code that should have been removed. The fix is to remove it!
6951 3. When running in the test harness, delay a bit after writing a bounce
6952 message to get a bit more predictability in the log output.
6954 4. Added a call to search_tidyup() just before forking a reception process. In
6955 theory, someone could use a lookup in the expansion of smtp_accept_max_
6956 per_host which, without the tidyup, could leave open a database connection.
6958 5. Added the variables $recipient_data and $sender_data which get set from a
6959 lookup success in an ACL "recipients" or "senders" condition, or a router
6960 "senders" option, similar to $domain_data and $local_part_data.
6962 6. Moved the writing of debug_print from before to after the "senders" test
6965 7. Change 4.31/66 (moving the time when the Received: is generated) caused
6966 problems for message scanning, either using a data ACL, or using
6967 local_scan() because the Received: header was not generated till after they
6968 were called (in order to set the time as the time of reception completion).
6969 I have revised the way this works. The header is now generated after the
6970 body is received, but before the ACL or local_scan() are called. After they
6971 are run, the timestamp in the header is updated.
6977 1. Change 4.24/6 introduced a bug because the SIGALRM handler was disabled
6978 before starting a queue runner without re-exec. This happened only when
6979 deliver_drop_privilege was set or when the Exim user was set to root. The
6980 effect of the bug was that timeouts during subsequent deliveries caused
6981 crashes instead of being properly handled. The handler is now left at its
6982 default (and expected) setting.
6984 2. The other case in which a daemon avoids a re-exec is to deliver an incoming
6985 message, again when deliver_drop_privilege is set or Exim is run as root.
6986 The bug described in (1) was not present in this case, but the tidying up
6987 of the other signals was missing. I have made the two cases consistent.
6989 3. The ignore_target_hosts setting on a manualroute router was being ignored
6990 for hosts that were looked up using the /MX notation.
6992 4. Added /ignore=<ip list> feature to @mx_any, @mx_primary, and @mx_secondary
6995 5. Change 4.31/55 was buggy, and broke when there was a rewriting rule that
6996 operated on the sender address. After changing the $sender_address to <>
6997 for the sender address verify, Exim was re-instated it as the original
6998 (before rewriting) address, but remembering that it had rewritten it, so it
6999 wasn't rewriting it again. This bug also had the effect of breaking the
7000 sender address verification caching when the sender address was rewritten.
7002 6. The ignore_target_hosts option was being ignored by the ipliteral router.
7003 This has been changed so that if the ip literal address matches
7004 ignore_target_hosts, the router declines.
7006 7. Added expansion conditions match_domain, match_address, and match_local_
7007 part (NOT match_host).
7009 8. The placeholder for the Received: header didn't have a length field set.
7011 9. Added code to Exim itself and to exim_lock to test for a specific race
7012 condition that could lead to file corruption when using MBX delivery. The
7013 issue is with the lockfile that is created in /tmp. If this file is removed
7014 after a process has opened it but before that process has acquired a lock,
7015 there is the potential for a second process to recreate the file and also
7016 acquire a lock. This could lead to two Exim processes writing to the file
7017 at the same time. The added code performs the same test as UW imapd; it
7018 checks after acquiring the lock that its file descriptor still refers to
7019 the same named file.
7021 10. The buffer for building added header lines was of fixed size, 8192 bytes.
7022 It is now parameterized by HEADER_ADD_BUFFER_SIZE and this can be adjusted
7025 11. Added the smtp_active_hostname option. If used, this will typically be made
7026 to depend on the incoming interface address. Because $interface_address is
7027 not set up until the daemon has forked a reception process, error responses
7028 that can happen earlier (such as "too many connections") no longer contain
7031 12. If an expansion in a condition on a "warn" statement fails because a lookup
7032 defers, the "warn" statement is abandoned, and the next ACL statement is
7033 processed. Previously this caused the whole ACL to be aborted.
7035 13. Added the iplsearch lookup type.
7037 14. Added ident_timeout as a log selector.
7039 15. Added tls_certificate_verified as a log selector.
7041 16. Added a global option tls_require_ciphers (compare the smtp transport
7042 option of the same name). This controls incoming TLS connections.
7044 17. I finally figured out how to make tls_require_ciphers do a similar thing
7045 in GNUtls to what it does in OpenSSL, that is, set up an appropriate list
7046 before starting the TLS session.
7048 18. Tabs are now shown as \t in -bP output.
7050 19. If the log selector return_path_on_delivery was set, Exim crashed when
7051 bouncing a message because it had too many Received: header lines.
7053 20. If two routers both had headers_remove settings, and the first one included
7054 a superfluous trailing colon, the final name in the first list and the
7055 first name in the second list were incorrectly joined into one item (with a
7056 colon in the middle).
7062 1. Added -C and -D options to the exinext utility, mainly to make it easier
7063 to include in the automated testing, but these could be helpful when
7064 multiple configurations are in use.
7066 2. The exinext utility was not formatting the output nicely when there was
7067 an alternate port involved in the retry record key, nor when there was a
7068 message id as well (for retries that were specific to a specific message
7069 and a specific host). It was also confused by IPv6 addresses, because of
7070 the additional colons they contain. I have fixed the IPv4 problem, and
7071 patched it up to do a reasonable job for IPv6.
7073 3. When there is an error after a MAIL, RCPT, or DATA SMTP command during
7074 delivery, the log line now contains "pipelined" if PIPELINING was used.
7076 4. An SMTP transport process used to panic and die if the bind() call to set
7077 an explicit outgoing interface failed. This has been changed; it is now
7078 treated in the same way as a connect() failure.
7080 5. A reference to $sender_host_name in the part of a conditional expansion
7081 that was being skipped was still causing a DNS lookup. This no longer
7084 6. The def: expansion condition was not recognizing references to header lines
7085 that used bh_ and bheader_.
7087 7. Added the _cache feature to named lists.
7089 8. The code for checking quota_filecount in the appendfile transport was
7090 allowing one more file than it should have been.
7092 9. For compatibility with Sendmail, the command line option
7100 and sets the incoming protocol and host name (for trusted callers). The
7101 host name and its colon can be omitted when only the protocol is to be set.
7102 Note the Exim already has two private options, -pd and -ps, that refer to
7103 embedded Perl. It is therefore impossible to set a protocol value of "d" or
7104 "s", but I don't think that's a major issue.
7106 10. A number of refactoring changes to the code, none of which should affect
7109 (a) The number of logging options was getting close to filling up the
7110 32-bit word that was used as a bit map. I have split them into two classes:
7111 those that are passed in the argument to log_write(), and those that are
7112 only ever tested independently outside of that function. These are now in
7113 separate 32-bit words, so there is plenty of room for expansion again.
7114 There is no change in the user interface or the logging behaviour.
7116 (b) When building, for example, log lines, the code previously used a
7117 macro that called string_cat() twice, in order to add two strings. This is
7118 not really sufficiently general. Furthermore, there was one instance where
7119 it was actually wrong because one of the argument was used twice, and in
7120 one call a function was used. (As it happened, calling the function twice
7121 did not affect the overall behaviour.) The macro has been replaced by a
7122 function that can join an arbitrary number of extra strings onto a growing
7125 (c) The code for expansion conditions now uses a table and a binary chop
7126 instead of a serial search (which was left over from when there were very
7127 few conditions). Also, it now recognizes conditions like "pam" even when
7128 the relevant support is not compiled in: a suitably worded error message is
7129 given if an attempt is made to use such a condition.
7131 11. Added ${time_interval:xxxxx}.
7133 12. A bug was causing one of the ddress fields not to be passed back correctly
7134 from remote delivery subprocesses. The field in question was not being
7135 subsequently used, so this caused to problems in practice.
7137 13. Added new log selectors queue_time and deliver_time.
7139 14. Might have fixed a bug in maildirsizefile handling that threw up
7140 "unexpected character" debug warnings, and recalculated the data
7141 unnecessarily. In any case, I expanded the warning message to give more
7144 15. Added the message "Restricted characters in address" to the statements in
7145 the default ACL that block characters like @ and % in local parts.
7147 16. Change 71 for release 4.31 proved to be much less benign that I imagined.
7148 Three changes have been made:
7150 (a) There was a serious bug; a negative response to MAIL caused the whole
7151 recipient domain to be cached as invalid, thereby blocking all messages
7152 to all local parts at the same domain, from all senders. This bug has
7153 been fixed. The domain is no longer cached after a negative response to
7154 MAIL if the sender used is not empty.
7156 (b) The default behaviour of using MAIL FROM:<> for recipient callouts has
7159 (c) A new callout option, "use_sender" has been added for people who want
7160 the modified behaviour.
7166 1. Removed "EXTRALIBS=-lwrap" from OS/Makefile-Unixware7 on the advice of
7169 2. Removed "LIBS = -lresolv" from OS/Makefile-Darwin as it is not needed, and
7170 indeed breaks things for older releases.
7172 3. Added additional logging to the case where there is a problem reading data
7173 from a filter that is running in a subprocess using a pipe, in order to
7174 try to track down a specific problem.
7176 4. Testing facility fudge: when running in the test harness and attempting
7177 to connect to 10.x.x.x (expecting a connection timeout) I'm now sometimes
7178 getting "No route to host". Convert this to a timeout.
7180 5. Define ICONV_ARG2_TYPE as "char **" for Unixware7 to avoid compiler
7183 6. Some OS don't have socklen_t but use size_t instead. This affects the
7184 fifth argument of getsockopt() amongst other things. This is now
7185 configurable by a macro called SOCKLEN_T which defaults to socklen_t, but
7186 can be set for individual OS. I have set it for SunOS5, OSF1, and
7187 Unixware7. Current versions of SunOS5 (aka Solaris) do have socklen_t, but
7188 some earlier ones do not.
7190 7. Change 4.30/15 was not doing the test caselessly.
7192 8. The standard form for an IPv6 address literal was being rejected by address
7193 parsing in, for example, MAIL and RCPT commands. An example of this kind of
7194 address is [IPv6:2002:c1ed:8229:10:202:2dff:fe07:a42a]. Exim now accepts
7195 this, as well as the form without the "IPv6" on the front (but only when
7196 address literals are enabled, of course).
7198 9. Added some casts to avoid compiler warnings in OS/os.c-Linux.
7200 10. Exim crashed if a message with an empty sender address specified by -f
7201 encountered a router with an errors_to setting. This could be provoked only
7202 by a command such as
7206 where an empty string was supplied; "<>" did not hit this bug.
7208 11. Installed PCRE release 4.5.
7210 12. If EHLO/HELO was rejected by an ACL, the value of $sender_helo_name
7211 remained set. It is now erased.
7213 13. exiqgrep wasn't working on MacOS X because it didn't correctly compute
7214 times from message ids (which are base 36 rather than the normal 62).
7216 14. "Expected" SMTP protocol errors that can arise when PIPELINING is in use
7217 were being counted as actual protocol errors, and logged if the log
7218 selector +smtp_protocol_error was set. One cannot be perfect in this test,
7219 but now, if PIPELINING has been advertised, RCPT following a rejected MAIL,
7220 and DATA following a set of rejected RCPTs do not count as protocol errors.
7221 In other words, Exim assumes they were pipelined, though this may not
7222 actually be the case. Of course, in all cases the client gets an
7223 appropriate error code.
7225 15. If a lookup fails in an ACL condition, a message about the failure may
7226 be available; it is used if testing the ACL cannot continue, because most
7227 such messages specify what the cause of the deferral is. However, some
7228 messages (e.g. "MYSQL: no data found") do not cause a defer. There was bug
7229 that caused an old message to be retained and used if a later statement
7230 caused a defer, replacing the real cause of the deferral.
7232 16. If an IP address had so many PTR records that the DNS lookup buffer
7233 was not large enough to hold them, Exim could crash while trying to process
7234 the truncated data. It now detects and logs this case.
7236 17. Further to 4.21/58, another change has been made: if (and only if) the
7237 first line of a message (the first header line) ends with CRLF, a bare LF
7238 in a subsequent header line has a space inserted after it, so as not to
7239 terminate the header.
7241 18. Refactoring: tidied an ugly bit of code in appendfile that copied data
7242 unnecessarily, used atoi() instead of strtol(), and didn't check the
7243 termination when getting file sizes from file names by regex.
7245 19. Completely re-implemented the support for maildirsize files, in the light
7246 of a number of problems with the previous contributed implementation
7247 (4.30/29). In particular:
7249 . If the quota is zero, the maildirsize file is maintained, but no quota is
7252 . If the maildir directory does not exist, it is created before any attempt
7253 to write a maildirsize file.
7255 . The quota value in the file is just a cache; if the quota is changed in
7256 the transport, the new value overrides.
7258 . A regular expression is available for excluding directories from the
7261 20. The autoreply transport checks the characters in options that define the
7262 message's headers; it allows continued headers, but it was checking with
7263 isspace() after an embedded newline instead of explicitly looking for a
7266 21. If all the "regular" hosts to which an address was routed had passed their
7267 expiry times, and had not reached their retry times, the address was
7268 bounced, even if fallback hosts were defined. Now Exim should go on to try
7271 22. Increased buffer sizes in the callout code from 1024 to 4096 to match the
7272 equivalent code in the SMTP transport. Some hosts send humungous responses
7273 to HELO/EHLO, more than 1024 it seems.
7275 23. Refactoring: code in filter.c used (void *) for "any old type" but this
7276 gives compiler warnings in some environments. I've now done it "properly",
7279 24. The replacement for inet_ntoa() that is used with gcc on IRIX systems
7280 (because of problems with the built-in one) was declared to return uschar *
7281 instead of char *, causing compiler failure.
7283 25. Fixed a file descriptor leak when processing alias/forward files.
7285 26. Fixed a minor format string issue in dbfn.c.
7287 27. Typo in exim.c: ("dmbnz" for "dbmnz").
7289 28. If a filter file refered to $h_xxx or $message_headers, and the headers
7290 contained RFC 2047 "words", Exim's memory could, under certain conditions,
7293 29. When a sender address is verified, it is cached, to save repeating the test
7294 when there is more than one recipient in a message. However, when the
7295 verification involves a callout, it is possible for different callout
7296 options to be set for different recipients. It is too complicated to keep
7297 track of this in the cache, so now Exim always runs a verification when a
7298 callout is required, relying on the callout cache for the optimization.
7299 The overhead is duplication of the address routing, but this should not be
7302 30. Fixed a bug in callout caching. If a RCPT command caused the sender address
7303 to be verified with callout=postmaster, and the main callout worked but the
7304 postmaster check failed, the verification correctly failed. However, if a
7305 subsequent RCPT command asked for sender verification *without* the
7306 postmaster check, incorrect caching caused this verification also to fail,
7309 31. Exim caches DNS lookup failures so as to avoid multiple timeouts; however,
7310 it was not caching the DNS options (qualify_single, search_parents) that
7311 were used when the lookup failed. A subsequent lookup with different
7312 options therefore always gave the same answer, though there were cases
7313 where it should not have. (Example: a "domains = !$mx_any" option on a
7314 dnslookup router: the "domains" option is always processed without any
7315 widening, but the router might have qualify_single set.) Now Exim uses the
7316 cached value only when the same options are set.
7318 32. Added John Jetmore's "exipick" utility to the distribution.
7320 33. GnuTLS: When an attempt to start a TLS session fails for any reason other
7321 than a timeout (e.g. a certificate is required, and is not provided), an
7322 Exim server now closes the connection immediately. Previously it waited for
7323 the client to close - but if the client is SSL, it seems that they each
7324 wait for each other, leading to a delay before one of them times out.
7326 34: GnuTLS: Updated the code to use the new GnuTLS 1.0.0 API. I have not
7327 maintained 0.8.x compatibility because I don't think many are using it, and
7328 it is clearly obsolete.
7330 35. Added TLS support for CRLs: a tls_crl global option and one for the smtp
7333 36. OpenSSL: $tls_certificate_verified was being set to 1 even if the
7334 client certificate was expired. A simple patch fixes this, though I don't
7335 understand the full logic of why the verify callback is called multiple
7338 37. OpenSSL: a patch from Robert Roselius: "Enable client-bug workaround.
7339 Versions of OpenSSL as of 0.9.6d include a 'CBC countermeasure' feature,
7340 which causes problems with some clients (such as the Certicom SSL Plus
7341 library used by Eudora). This option, SSL_OP_DONT_INSERT_EMPTY_FRAGMENTS,
7342 disables the coutermeasure allowing Eudora to connect."
7344 38. Exim was not checking that a write() to a log file succeeded. This could
7345 lead to Bad Things if a log got too big, in particular if it hit a file
7346 size limit. Exim now panics and dies if it cannot write to a log file, just
7347 as it does if it cannot open a log file.
7349 39. Modified OS/Makefile-Linux so that it now contains
7351 CFLAGS=-O -D_FILE_OFFSET_BITS=64 -D_LARGEFILE_SOURCE
7353 The two -D definitions ensure that Exim is compiled with large file
7354 support, which makes it possible to handle log files that are bigger than
7357 40. Fixed a subtle caching bug: if (in an ACL or a set of routers, for
7358 instance) a domain was checked against a named list that involved a lookup,
7359 causing $domain_data to be set, then another domain was checked against the
7360 same list, then the first domain was re-checked, the value of $domain_data
7361 after the final check could be wrong. In particular, if the second check
7362 failed, it could be set empty. This bug probably also applied to
7365 41. The strip_trailing_dot option was not being applied to the address given
7366 with the -f command-line option.
7368 42. The code for reading a message's header from the spool was incrementing
7369 $received_count, but never initializing it. This meant that the value was
7370 incorrect (doubled) while delivering a message in the same process in which
7371 it was received. In the most common configuration of Exim, this never
7372 happens - a fresh exec is done - but it can happen when
7373 deliver_drop_privilege is set.
7375 43. When Exim logs an SMTP synchronization error - client data sent too soon -
7376 it now includes up to 150 characters of the unexpected data in the log
7379 44. The exim_dbmbuild utility uses fixed size buffers for reading input lines
7380 and building data strings. The size of both of these buffers was 10 000
7381 bytes - far larger than anybody would *ever* want, thought I. Needless to
7382 say, somebody hit the limit. I have increased the maximum line length to
7383 20 000 and the maximum data length of concatenated lines to 100 000. I have
7384 also fixed two bugs, because there was no checking on these buffers. Tsk,
7385 tsk. Now exim_dbmbuild gives a message and exits with an error code if a
7386 buffer is too small.
7388 45. The exim_dbmbuild utility did not support quoted keys, as Exim does in
7389 lsearch lookups. Now it does.
7391 46. When parsing a route_list item in a manualroute router, a fixed-length
7392 buffer was used for the list of hosts. I made this 1024 bytes long,
7393 thinking that nobody would ever have a list of hosts that long. Wrong.
7394 Somebody had a whole pile of complicated expansion conditions, and the
7395 string was silently truncated, leading to an expansion error. It turns out
7396 that it is easier to change to an unlimited length (owing to other changes
7397 that have happened since this code was originally written) than to build
7398 structure for giving a limitation error. The length of the item that
7399 expands into the list of hosts is now unlimited.
7401 47. The lsearch lookup could not handle data where the length of text line was
7402 more than 4095 characters. Such lines were truncated, leading to shortened
7403 data being returned. It should now handle lines of any length.
7405 48. Minor wording revision: "cannot test xxx in yyy ACL" becomes "cannot test
7406 xxx condition in yyy ACL" (e.g. "cannot test domains condition in DATA
7409 49. Cosmetic tidy to scripts like exicyclog that are generated by globally
7410 replacing strings such as BIN_DIRECTORY in a source file: the replacement
7411 no longer happens in comment lines. A list of replacements is now placed
7412 at the head of all of the source files, except those whose only change is
7413 to replace PERL_COMMAND in the very first #! line.
7415 50. Replaced the slow insertion sort in queue.c, for sorting the list of
7416 messages on the queue, with a bottom-up merge sort, using code contributed
7417 by Michael Haardt. This should make operations like -bp somewhat faster on
7418 large queues. It won't affect queue runners, except when queue_run_in_order
7421 51. Installed eximstats 1.31 in the distribution.
7423 52. Added support for SRV lookups to the dnslookup router.
7425 53. If an ACL referred to $message_body or $message_body_end, the value was not
7426 reset for any messages that followed in the same SMTP session.
7428 54. The store-handling optimization for building very long strings was not
7429 differentiating between the different store pools. I don't think this
7430 actually made any difference in practice, but I've tidied it.
7432 55. While running the routers to verify a sender address, $sender_address
7433 was still set to the sender address. This is wrong, because when routing to
7434 send a bounce to the sender, it would be empty. Therefore, I have changed
7435 it so that, while verifying a sender address, $sender_address is set to <>.
7436 (There is no change to what happens when verifying a recipient address.)
7438 56. After finding MX (or SRV) records, Exim was doing a DNS lookup for the
7439 target A or AAAA records (if not already returned) without resetting the
7440 qualify_single or search_parents options of the DNS resolver. These are
7441 inappropriate in this case because the targets of MX and SRV records must
7442 be FQDNs. A broken DNS record could cause trouble if it happened to have a
7443 target that, when qualified, matched something in the local domain. These
7444 two options are now turned off when doing these lookups.
7446 57. It seems that at least some releases of Reiserfs (which does not have the
7447 concept of a fixed number of inodes) returns zero and not -1 for the
7448 number of available inodes. This interacted badly with check_spool_inodes,
7449 which assumed that -1 was the "no such thing" setting. What I have done is
7450 to check that the total number of inodes is greater than zero before doing
7451 the test of how many are available.
7453 58. When a "warn" ACL statement has a log_message modifier, the message is
7454 remembered, and not repeated. This is to avoid a lot of repetition when a
7455 message has many recipients that cause the same warning to be written.
7456 However, Exim was preserving the list of already written lines for an
7457 entire SMTP session, which doesn't seem right. The memory is now reset if a
7458 new message is started.
7460 59. The "rewrite" debugging flag was not showing the result of rewriting in the
7461 debugging output unless log_rewrite was also set.
7463 60. Avoid a compiler warning on 64-bit systems in dsearch.c by avoiding the use
7464 of (int)(handle) when we know that handle contains (void *)(-1).
7466 61. The Exim daemon panic-logs an error return when it closes the incoming
7467 connection. However "connection reset by peer" seems to be common, and
7468 isn't really an error worthy of noting specially, so that particular error
7471 62. When Exim is trying to find all the local interfaces, it used to panic and
7472 die if the ioctl to get the interface flags failed. However, it seems that
7473 on at least one OS (Solaris 9) it is possible to have an interface that is
7474 included in the list of interfaces, but for which you get a failure error
7475 for this call. This happens when the interface is not "plumbed" into a
7476 protocol (i.e. neither IPv4 nor IPv6). I've changed the code so that a
7477 failure of the "get flags" call assumes that the interface is down.
7479 63. Added a ${eval10: operator, which assumes all numbers are decimal. This
7480 makes life easier for people who are doing arithmetic on fields extracted
7481 from dates, where you often get leading zeros that should not be
7482 interpreted as octal.
7484 64. Added qualify_domain to the redirect router, to override the global
7487 65. If a pathologically long header line contained very many addresses (the
7488 report of this problem mentioned 10 000) and each of them was rewritten,
7489 Exim could use up a very large amount of memory. (It kept on making new
7490 copies of the header line as it rewrote, and never released the old ones.)
7491 At the expense of a bit more processing, the header rewriting function has
7492 been changed so that it no longer eats memory in this way.
7494 66. The generation of the Received: header has been moved from the time that a
7495 message starts to be received, to the time that it finishes. The timestamp
7496 in the Received: header should now be very close to that of the <= log
7497 line. There are two side-effects of this change:
7499 (a) If a message is rejected by a DATA or non-SMTP ACL or local_scan(), the
7500 logged header lines no longer include the local Received: line, because
7501 it has not yet been created. The same applies to a copy of the message
7502 that is returned to a non-SMTP sender when a message is rejected.
7504 (b) When a filter file is tested using -bf, no additional Received: header
7505 is added to the test message. After some thought, I decided that this
7508 This change does not affect the value of $received_for. It is still set
7509 after address rewriting, but before local_scan() is called.
7511 67. Installed the latest Cygwin-specific files from the Cygwin maintainer.
7513 68. GnuTLS: If an empty file is specified for tls_verify_certificates, GnuTLS
7514 gave an unhelpful panic error message, and a defer error. I have managed to
7515 change this behaviour so that it now rejects any supplied certificate,
7516 which seems right, as the list of acceptable certificates is empty.
7518 69. OpenSSL: If an empty file is specified for tls_verify_certificates, OpenSSL
7519 gave an unhelpful defer error. I have not managed to make this reject any
7520 supplied certificates, but the error message it gives is "no certificate
7521 supplied", which is not helpful.
7523 70. exigrep's output now also includes lines that are not associated with any
7524 message, but which match the given pattern. Implemented by a patch from
7525 Martin Sluka, which also tidied up the Perl a bit.
7527 71. Recipient callout verification, like sender verification, was using <> in
7528 the MAIL FROM command. This isn't really the right thing, since the actual
7529 sender may affect whether the remote host accepts the recipient or not. I
7530 have changed it to use the actual sender in the callout; this means that
7531 the cache record is now keyed on a recipient/sender pair, not just the
7532 recipient address. There doesn't seem to be a real danger of callout loops,
7533 since a callout by the remote host to check the sender would use <>.
7534 [SEE ABOVE: changed after hitting problems.]
7536 72. Exim treats illegal SMTP error codes that do not begin with 4 or 5 as
7537 temporary errors. However, in the case of such a code being given after
7538 the end of a data transmission (i.e. after ".") Exim was failing to write
7539 a retry record for the message. (Yes, there was some broken host that was
7540 actually sending 8xx at this point.)
7542 73. An unknown lookup type in a host list could cause Exim to panic-die when
7543 the list was checked. (An example that provoked this was putting <; in the
7544 middle of a list instead of at the start.) If this happened during a DATA
7545 ACL check, a -D file could be left lying around. This kind of configuration
7546 error no longer causes Exim to die; instead it causes a defer error. The
7547 incident is still logged to the main and panic logs.
7549 74. Buglet left over from Exim 3 conversion. The message "too many messages
7550 in one connection" was written to the rejectlog but not the mainlog, except
7551 when address rewriting (yes!) was being logged.
7553 75. Added write_rejectlog option.
7555 76. When a system filter was run not as root (that is, when system_filter_user
7556 was set), the values of the $n variables were not being returned to the
7557 main process; thus, they were not subsequently available in the $sn
7560 77. Added +return_path_on_delivery log selector.
7562 78. A connection timeout was being treated differently from recipients deferred
7563 when testing hosts_max_try with a message that was older than the host's
7564 retry timeout. (The host should not be counted, thus allowing all hosts to
7565 be tried at least once before bouncing.) This may have been the cause of an
7566 occasionally reported bug whereby a message would remain on the queue
7567 longer than the retry timeout, but would be bounced if a delivery was
7568 forced. I say "may" because I never totally pinned down the problem;
7569 setting up timeout/retry tests is difficult. See also the next item.
7571 79. The ultimate address timeout was not being applied to errors that involved
7572 a combination of host plus message (for example, a timeout on a MAIL
7573 command). When an address resolved to a number of possible hosts, and they
7574 were not all tried for each delivery (e.g. because of hosts_max_try), a
7575 message could remain on the queue longer than the retry timeout.
7577 80. Sieve bug: "stop" inside "elsif" was broken. Applied a patch from Michael
7580 81. Fixed an obscure SMTP outgoing bug which required at least the following
7581 conditions: (a) there was another message waiting for the same server;
7582 (b) the server returned 5xx to all RCPT commands in the first message so
7583 that the message was not completed; (c) the server dropped the connection
7584 or gave a negative response to the RSET that Exim sends to abort the
7585 transaction. The observed case was a dropped connection after DATA that had
7586 been sent in pipelining mode. That is, the server had advertised PIPELINING
7587 but was not implementing it correctly. The effect of the bug was incorrect
7588 behaviour, such as trying another host, and this could lead to a crash.
7594 1. The 3rd arguments to getsockname(), getpeername(), and accept() in exim.c
7595 and daemon.c were passed as pointers to ints; they should have been
7596 pointers to socklen_t variables (which are typically unsigned ints).
7598 2. Some signed/unsigned type warnings in the os.c file for Linux have been
7601 3. Fixed a really odd bug that affected only the testing scheme; patching a
7602 certain fixed string in the binary changed the value of another string that
7603 happened to be identical to the end of the original first string.
7605 4. When gethostbyname() (or equivalent) is passed an IP address as a "host
7606 name", it returns that address as the IP address. On some operating
7607 systems (e.g. Solaris), it also passes back the IP address string as the
7608 "host name". However, on others (e.g. Linux), it passes back an empty
7609 string. Exim wasn't checking for this, and was changing the host name to an
7610 empty string, assuming it had been canonicalized.
7612 5. Although rare, it is permitted to have more than one PTR record for a given
7613 IP address. I thought that gethostbyaddr() or getipnodebyaddr() always gave
7614 all the names associated with an address, because they do in Solaris.
7615 However, it seems that they do not in Linux for data that comes from the
7616 DNS. If an address in /etc/hosts has multiple names, they _are_ all given.
7617 I found this out when I moved to a new Linux workstation and tried to run
7618 the Exim test suite.
7620 To get round this problem I have changed the code so that it now does its
7621 own call to the DNS to look up PTR records when searching for a host name.
7622 If nothing can be found in the DNS, it tries gethostbyaddr(), so that
7623 addresses that are only in /etc/hosts are still found.
7625 This behaviour is, however, controlled by an option called host_lookup_
7626 order, which defaults to "bydns:byaddr". If people want to use the other
7627 order, or indeed, just use one or the other means of lookup, they can
7628 specify it in this variable.
7630 6. If a PTR record yields an empty name, Exim treats it as non-existent. In
7631 some operating systems, this comes back from gethostbyaddr() as an empty
7632 string, and this is what Exim used to test for. However, it seems that in
7633 other systems, "." is yielded. Exim now tests for this case too.
7635 7. The values of check_spool_space and check_log_space are now held internally
7636 as a number of kilobytes instead of an absolute number of bytes. If a
7637 numbers is specified without 'K' or 'M', it is rounded up to the nearest
7638 kilobyte. This means that much larger values can be stored.
7640 8. Exim monitor: an attempt to get the action menu when not actually pointing
7641 at a message produces an empty menu entitled "No message selected". This
7642 works on Solaris (OpenWindows). However, XFree86 does not like a menu with
7643 no entries in it ("Shell widget menu has zero width and/or height"). So I
7644 have added a single, blank menu entry in this case.
7646 9. Added ${quote_local_part.
7648 10. MIME decoding is now applied to the contents of Subject: header lines when
7651 11. Now that a reference to $sender_host_address automatically causes a reverse
7652 lookup to occur if necessary (4.13/18), there is no need to arrange for a
7653 host lookup before query-style lookups in lists that might use this
7654 variable. This has therefore been abolished, and the "net-" prefix is no
7655 longer necessary for query-style lookups.
7657 12. The Makefile for SCO_SV contained a setting of LDFLAGS. This appears to
7658 have been a typo for LFLAGS, so it has been changed.
7660 13. The install script calls Exim with "-C /dev/null" in order to find the
7661 version number. If ALT_CONFIG_PREFIX was set, this caused an error message
7662 to be output. However, since Exim outputs its version number before the
7663 error, it didn't break the script. It just looked ugly. I fixed this by
7664 always allowing "-C /dev/null" if the caller is root.
7666 14. Ignore overlarge ACL variable number when reading spool file - insurance
7667 against a later release with more variables having written the file.
7669 15. The standard form for an IPv6 address literal was being rejected by EHLO.
7670 Example: [IPv6:2002:c1ed:8229:10:202:2dff:fe07:a42a]. Exim now accepts
7671 this, as well as the form without the "IPv6" on the front.
7673 16. Added CHOWN_COMMAND=/usr/sbin/chown and LIBS=-lresolv to the
7674 OS/Makefile-Darwin file.
7676 17. Fixed typo in lookups/ldap.c: D_LOOKUP should be D_lookup. This applied
7677 only to LDAP libraries that do not have LDAP_OPT_DEREF.
7679 18. After change 4.21/52, "%ld" was used to format the contents of the $inode
7680 variable. However, some OS use ints for inodes. I've added cast to long int
7681 to get rid of the compiler warning.
7683 19. I had forgotten to lock out "/../" in configuration file names when
7684 ALT_CONFIG_PREFIX was set.
7686 20. Routers used for verification do not need to specify transports. However,
7687 if such a router generated a host list, and callout was configured, Exim
7688 crashed, because it could not find a port number from the (non-existent)
7689 transport. It now assumes port 25 in this circumstance.
7691 21. Added the -t option to exigrep.
7693 22. If LOOKUP_LSEARCH is defined, all three linear search methods (lsearch,
7694 wildlsearch, nwildlsearch) are compiled. LOOKUP_WILDLSEARCH and LOOKUP_
7695 NWILDLSEARCH are now obsolete, but retained for compatibility. If either of
7696 them is set, LOOKUP_LSEARCH is forced.
7698 23. "exim -bV" now outputs a list of lookups that are included in the binary.
7700 24. Added sender and host information to the "rejected by local_scan()" log
7701 line; previously there was no indication of these.
7703 25. Added .include_if_exists.
7705 26. Change 3.952/11 added an explicit directory sync on top of a file sync for
7706 Linux. It turns out that not all file systems support this. Apparently some
7707 versions of NFS do not. (It's rare to put Exim's spool on NFS, but people
7708 do it.) To cope with this, the error EINVAL, which means that sync-ing is
7709 not supported on the file descriptor, is now ignored when Exim is trying to
7710 sync a directory. This applies only to Linux.
7712 27. Added -DBIND_8_COMPAT to the CLFAGS setting for Darwin.
7714 28. In Darwin (MacOS X), the PAM headers are in /usr/include/pam and not in
7715 /usr/include/security. There's now a flag in OS/os.h-Darwin to cope with
7718 29. Added support for maildirsize files from supplied patch (modified a bit).
7720 30. The use of :fail: followed by an empty string could lead Exim to respond to
7721 sender verification failures with (e.g.):
7723 550 Verification failed for <xxx>
7724 550 Sender verify failed
7726 where the first response line was missing the '-' that indicates it is not
7727 the final line of the response.
7729 31. The loop for finding the name of the user that called Exim had a hardwired
7730 limit of 10; it now uses the value of finduser_retries, which is used for
7731 all other user lookups.
7733 32. Added $received_count variable, available in data and not_smtp ACLs, and at
7736 33. Exim was neglecting to zero errno before one call of strtol() when
7737 expanding a string and expecting an integer value. On some systems this
7738 resulted in spurious "integer overflow" errors. Also, it was casting the
7739 result into an int without checking.
7741 34. Testing for a connection timeout using "timeout_connect" in the retry rules
7742 did not work. The code looks as if it has *never* worked, though it appears
7743 to have been documented since at least release 1.62. I have made it work.
7745 35. The "timeout_DNS" error in retry rules, also documented since at least
7746 1.62, also never worked. As it isn't clear exactly what this means, and
7747 clearly it isn't a major issue, I have abolished the feature by treating it
7748 as "timeout", and writing a warning to the main and panic logs.
7750 36. The display of retry rules for -brt wasn't always showing the error code
7753 37. Added new error conditions to retry rules: timeout_A, timeout_MX,
7754 timeout_connect_A, timeout_connect_MX.
7756 38. Rewriting the envelope sender at SMTP time did not allow it to be rewritten
7757 to the empty sender.
7759 39. The daemon was not analysing the content of -oX till after it had closed
7760 stderr and disconnected from the controlling terminal. This meant that any
7761 syntax errors were only noted on the panic log, and the return code from
7762 the command was 0. By re-arranging the code a little, I've made the
7763 decoding happen first, so such errors now appear on stderr, and the return
7764 code is 1. However, the actual setting up of the sockets still happens in
7765 the disconnected process, so errors there are still only recorded on the
7768 40. A daemon listener on a wildcard IPv6 socket that also accepts IPv4
7769 connections (as happens on some IP stacks) was logged at start up time as
7770 just listening for IPv6. It now logs "IPv6 with IPv4". This differentiates
7771 it from "IPv6 and IPv4", which means that two separate sockets are being
7774 41. The debug output for gethostbyname2() or getipnodebyname() failures now
7775 says whether AF_INET or AF_INET6 was passed as an argument.
7777 42. Exiwhat output was messed up when time zones were included in log
7780 43. Exiwhat now gives more information about the daemon's listening ports,
7781 and whether -tls-on-connect was used.
7783 44. The "port" option of the smtp transport is now expanded.
7785 45. A "message" modifier in a "warn" statement in a non-message ACL was being
7786 silently ignored. Now an error message is written to the main and panic
7789 46. There's a new ACL modifier called "logwrite" which writes to a log file
7790 as soon as it is encountered.
7792 47. Added $local_user_uid and $local_user_gid at routing time.
7794 48. Exim crashed when trying to verify a sender address that was being
7797 49. Exim was recognizing only a space character after ".include". It now also
7798 recognizes a tab character.
7800 50. Fixed several bugs in the Perl script that creates the exim.8 man page by
7801 extracting the relevant information from the specification. The man page no
7802 longer contains scrambled data for the -d option, and I've added a section
7803 at the front about calling Exim under different names.
7805 51. Added "extra_headers" argument to the "mail" command in filter files.
7807 52. Redirecting mail to an unqualified address in a Sieve filter caused Exim to
7810 53. Installed eximstats 1.29.
7812 54. Added transport_filter_timeout as a generic transport option.
7814 55. Exim no longer adds an empty Bcc: header to messages that have no To: or
7815 Cc: header lines. This was required by RFC 822, but it not required by RFC
7818 56. Exim used to add From:, Date:, and Message-Id: header lines to any
7819 incoming messages that did not have them. Now it does so only if the
7820 message originates locally, that is, if there is no associated remote host
7821 address. When Resent- header lines are present, this applies to the Resent-
7822 lines rather than the non-Resent- lines.
7824 57. Drop incoming SMTP connection after too many syntax or protocol errors. The
7825 limit is controlled by smtp_max_synprot_errors, defaulting to 3.
7827 58. Messages for configuration errors now include the name of the main
7828 configuration file - useful now that there may be more than one file in a
7829 list (.included file names were always shown).
7831 59. Change 4.21/82 (run initgroups() when starting the daemon) causes problems
7832 for those rare installations that do not start the daemon as root or run it
7833 setuid root. I've cut out the call to initgroups() if the daemon is not
7836 60. The Exim user and group can now be bound into the binary as text strings
7837 that are looked up at the start of Exim's processing.
7839 61. Applied a small patch for the Interbase code, supplied by Ard Biesheuvel.
7841 62. Added $mailstore_basename variable.
7843 63. Installed patch to sieve.c from Michael Haardt.
7845 64. When Exim failed to open the panic log after failing to open the main log,
7846 the original message it was trying to log was written to stderr and debug
7847 output, but if they were not available (the usual case in production), it
7848 was lost. Now it is written to syslog before the two lines that record the
7849 failures to open the logs.
7851 65. Users' Exim filters run in subprocesses under the user's uid. It is
7852 possible for a "deliver" command or an alias in a "personal" command to
7853 provoke an address rewrite. If logging of address rewriting is configured,
7854 this fails because the process is not running as root or exim. There may be
7855 a better way of dealing with this, but for the moment (because 4.30 needs
7856 to be released), I have disabled address rewrite logging when running a
7857 filter in a non-root, non-exim process.
7863 1. The buildconfig auxiliary program wasn't quoting the value set for
7864 HEADERS_CHARSET. This caused a compilation error complaining that 'ISO' was
7865 not defined. This bug was masked in 4.22 by the effect that was fixed in
7868 2. Some messages that were rejected after a message id was allocated were
7869 shown as "incomplete" by exigrep. It no longer does this for messages that
7870 are rejected by local_scan() or the DATA or non-SMTP ACLs.
7872 3. If a Message-ID: header used a domain literal in the ID, and Exim did not
7873 have allow_domain_literals set, the ID did not get logged in the <= line.
7874 Domain literals are now always recognized in Message-ID: header lines.
7876 4. The first argument for a ${extract expansion item is the key name or field
7877 number. Leading and trailing spaces in this item were not being ignored,
7878 causing some misleading effects.
7880 5. When deliver_drop_privilege was set, single queue runner processes started
7881 manually (i.e. by the command "exim -q") or by the daemon (which uses the
7882 same command in the process it spins off) were not dropping privilege.
7884 6. When the daemon running as "exim" started a queue runner, it always
7885 re-executed Exim in the spun-off process. This is a waste of effort when
7886 deliver_drop_privilege is set. The new process now just calls the
7887 queue-runner function directly.
7893 1. Typo in the src/EDITME file: it referred to HEADERS_DECODE_TO instead of
7896 2. Change 4.21/73 introduced a bug. The pid file path set by -oP was being
7897 ignored. Though the use of -oP was forcing the writing of a pid file, it
7898 was always written to the default place.
7900 3. If the message "no IP address found for host xxxx" is generated during
7901 incoming verification, it is now followed by identification of the incoming
7902 connection (so you can more easily find what provoked it).
7904 4. Bug fix for Sieve filters: "stop" inside a block was not working properly.
7906 5. Added some features to "harden" Exim a bit more against certain attacks:
7908 (a) There is now a build-time option called FIXED_NEVER_USERS that can
7909 be put in Local/Makefile. This is like the never_users runtime option,
7910 but it cannot be overridden. The default setting is "root".
7912 (b) If ALT_CONFIG_PREFIX is defined in Local/Makefile, it specifies a
7913 prefix string with which any file named in a -C command line option
7916 (c) If ALT_CONFIG_ROOT_ONLY is defined in Local/Makefile, root privilege
7917 is retained for -C and -D only if the caller of Exim is root. Without
7918 it, the exim user may also use -C and -D and retain privilege.
7920 (d) If DISABLE_D_OPTION is defined in Local/Makefile, the use of the -D
7921 command line option is disabled.
7923 6. Macro names set by the -D option must start with an upper case letter, just
7924 like macro names defined in the configuration file.
7926 7. Added "dereference=" facility to LDAP.
7928 8. Two instances of the typo "uknown" in the source files are fixed.
7930 9. If a PERL_COMMAND setting in Local/Makefile was not at the start of a line,
7931 the Configure-Makefile script screwed up while processing it.
7933 10. Incorporated PCRE 4.4.
7935 11. The SMTP synchronization check was not operating right at the start of an
7936 SMTP session. For example, it could not catch a HELO sent before the client
7937 waited for the greeting. There is now a check for outstanding input at the
7938 point when the greeting is written. Because of the duplex, asynchronous
7939 nature of TCP/IP, it cannot be perfect - the incorrect input may be on its
7940 way, but not yet received, when the check is performed.
7942 12. Added tcp_nodelay to make it possible to turn of the setting of TCP_NODELAY
7943 on TCP/IP sockets, because this apparently causes some broken clients to
7946 13. Installed revised OS/Makefile-CYGWIN and OS/os.c-cygwin (the .h file was
7947 unchanged) from the Cygwin maintainer.
7949 14. The code for -bV that shows what is in the binary showed "mbx" when maildir
7950 was supported instead of testing for mbx. Effectively a typo.
7952 15. The spa authenticator server code was not checking that the input it
7953 received was valid base64.
7955 16. The debug output line for the "set" modifier in ACLs was not showing the
7956 name of the variable that was being set.
7958 17. Code tidy: the variable type "vtype_string" was never used. Removed it.
7960 18. Previously, a reference to $sender_host_name did not cause a DNS reverse
7961 lookup on its own. Something else was needed to trigger the lookup. For
7962 example, a match in host_lookup or the need for a host name in a host list.
7963 Now, if $sender_host_name is referenced and the host name has not yet been
7964 looked up, a lookup is performed. If the lookup fails, the variable remains
7965 empty, and $host_lookup_failed is set to "1".
7967 19. Added "eqi" as a case-independent comparison operator.
7969 20. The saslauthd authentication condition could segfault if neither service
7970 nor realm was specified.
7972 21. If an overflowing value such as "2048M" was set for message_size_limit, the
7973 error message that was logged was misleading, and incoming SMTP
7974 connections were dropped. The message is now more accurate, and temporary
7975 errors are given to SMTP connections.
7977 22. In some error situations (such as 21 above) Exim rejects all SMTP commands
7978 (except RSET) with a 421 error, until QUIT is received. However, it was
7979 failing to send a response to QUIT.
7981 23. The HELO ACL was being run before the code for helo_try_verify_hosts,
7982 which made it impossible to use "verify = helo" in the HELO ACL. The HELO
7983 ACL is now run after the helo_try_verify_hosts code.
7985 24. "{MD5}" and "{SHA1}" are now recognized as equivalent to "{md5"} and
7986 "{sha1}" in the "crypteq" expansion condition (in fact the comparison is
7987 case-independent, so other case variants are also recognized). Apparently
7988 some systems use these upper case variants.
7990 25. If more than two messages were waiting for the same host, and a transport
7991 filter was specified for the transport, Exim sent two messages over the
7992 same TCP/IP connection, and then failed with "socket operation on non-
7993 socket" when it tried to send the third.
7995 26. Added Exim::debug_write and Exim::log_write for embedded Perl use.
7997 27. The extern definition of crypt16() in expand.c was not being excluded when
7998 the OS had its own crypt16() function.
8000 28. Added bounce_return_body as a new option, and bounce_return_size_limit
8001 as a preferred synonym for return_size_limit, both as an option and as an
8004 29. Added LIBS=-liconv to OS/Makefile-OSF1.
8006 30. Changed the default configuration ACL to relax the local part checking rule
8007 for addresses that are not in any local domains. For these addresses,
8008 slashes and pipe symbols are allowed within local parts, but the sequence
8009 /../ is explicitly forbidden.
8011 31. SPA server authentication was not clearing the challenge buffer before
8014 32. log_message in a "warn" ACL statement was writing to the reject log as
8015 well as to the main log, which contradicts the documentation and doesn't
8016 seem right (because no rejection is happening). So I have stopped it.
8018 33. Added Ard Biesheuvel's lookup code for accessing an Interbase database.
8019 However, I am unable to do any testing of this.
8021 34. Fixed an infelicity in the appendfile transport. When checking directories
8022 for a mailbox, to see if any needed to be created, it was accidentally
8023 using path names with one or more superfluous leading slashes; tracing
8024 would show up entries such as stat("///home/ph10", 0xFFBEEA48).
8026 35. If log_message is set on a "discard" verb in a MAIL or RCPT ACL, its
8027 contents are added to the log line that is written for every discarded
8028 recipient. (Previously a log_message setting was ignored.)
8030 36. The ${quote: operator now quotes the string if it is empty.
8032 37. The install script runs exim in order to find its version number. If for
8033 some reason other than non-existence or emptiness, which it checks, it
8034 could not run './exim', it was installing it with an empty version number,
8035 i.e. as "exim-". This error state is now caught, and the installation is
8038 38. An argument was missing from the function that creates an error message
8039 when Exim fails to connect to the socket for saslauthd authentication.
8040 This could cause Exim to crash, or give a corrupted message.
8042 39. Added isip, isip4, and isip6 to ${if conditions.
8044 40. The ACL variables $acl_xx are now saved with the message, and can be
8045 accessed later in routers, transports, and filters.
8047 41. The new lookup type nwildlsearch is like wildlsearch, except that the key
8048 strings in the file are not string-expanded.
8050 42. If a MAIL command specified a SIZE value that was too large to fit into an
8051 int variable, the check against message_size_limit failed. Such values are
8052 now forced to INT_MAX, which is around 2Gb for a 32-bit variable. Maybe one
8053 day this will have to be increased, but I don't think I want to be around
8054 when emails are that large.
8061 1. Removed HAVE_ICONV=yes from OS/Makefile-FreeBSD, since it seems that
8062 iconv() is not standard in FreeBSD.
8064 2. Change 4.21/17 was buggy and could cause stack overwriting on a system with
8065 IPv6 enabled. The observed symptom was a segmentation fault on return from
8066 the function os_common_find_running_interfaces() in src/os.c.
8068 3. In the check_special_case() function in daemon.c I had used "errno" as an
8069 argument name, which causes warnings on some systems. This was basically a
8070 typo, since it was named "eno" in the comments!
8072 4. The code that waits for the clock to tick (at a resolution of some fraction
8073 of a second) so as to ensure message-id uniqueness was always waiting for
8074 at least one whole tick, when it could have waited for less. [This is
8075 almost certainly not relevant at current processor speeds, where it is
8076 unlikely to ever wait at all. But we try to future-proof.]
8078 5. The function that sleeps for a time interval that includes fractions of a
8079 second contained a race. It did not block SIGALRM between setting the
8080 timer, and suspending (a couple of lines later). If the interval was short
8081 and the sigsuspend() was delayed until after it had expired, the suspension
8082 never ended. On busy systems this could lead to processes getting stuck for
8085 6. Some uncommon configurations may cause a lookup to happen in a queue runner
8086 process, before it forks any delivery processes. The open lookup caching
8087 mechanism meant that the open file or database connection was passed into
8088 the delivery process. The problem was that delivery processes always tidy
8089 up cached lookup data. This could cause a problem for the next delivery
8090 process started by the queue runner, because the external queue runner
8091 process does not know about the closure. So the next delivery process
8092 still has data in the lookup cache. In the case of a file lookup, there was
8093 no problem because closing a file descriptor in a subprocess doesn't affect
8094 the parent. However, if the lookup was caching a connection to a database,
8095 the connection was closed, and the second delivery process was likely to
8096 see errors such as "PGSQL: query failed: server closed the connection
8097 unexpectedly". The problem has been fixed by closing all cached lookups
8098 in a queue runner before running a delivery process.
8100 7. Compiler warning on Linux for the second argument of iconv(), which doesn't
8101 seem to have the "const" qualifier which it has on other OS. I've
8104 8. Change 4.21/2 was too strict. It is only if there are two authenticators
8105 *of the same type* (client or server) with the same public name that an
8106 error should be diagnosed.
8108 9. When Exim looked up a host name for an IP address, but failed to find the
8109 original IP address when looking up the host name (a safety check), it
8110 output the message "<ip address> does not match any IP for NULL", which was
8111 confusing, to say the least. The bug was that the host name should have
8112 appeared instead of "NULL".
8114 10. Since release 3.03, if Exim is called by a uid other than root or the Exim
8115 user that is built into the binary, and the -C or -D options is used, root
8116 privilege is dropped before the configuration file is read. In addition,
8117 logging is switched to stderr instead of the normal log files. If the
8118 configuration then re-defines the Exim user, the unprivileged environment
8119 is probably not what is expected, so Exim logs a panic warning message (but
8122 However, if deliver_drop_privilege is set, the unprivileged state may well
8123 be exactly what is intended, so the warning has been cut out in that case,
8124 and Exim is allowed to try to write to its normal log files.
8130 1. smtp_return_error_details was not giving details for temporary sender
8131 or receiver verification errors.
8133 2. Diagnose a configuration error if two authenticators have the same public
8136 3. Exim used not to create the message log file for a message until the first
8137 delivery attempt. This could be confusing when incoming messages were held
8138 for policy or load reasons. The message log file is now created at the time
8139 the message is received, and an initial "Received" line is written to it.
8141 4. The automatically generated man page for command line options had a minor
8142 bug that caused no ill effects; however, a more serious problem was that
8143 the procedure for building the man page automatically didn't always
8144 operate. Consequently, release 4.20 contains an out-of-date version. This
8145 shouldn't happen again.
8147 5. When building Exim with embedded Perl support, the script that builds the
8148 Makefile was calling 'perl' to find its compile-time parameters, ignoring
8149 any setting of PERL_COMMAND in Local/Makefile. This is now fixed.
8151 6. The freeze_tell option was not being used for messages that were frozen on
8152 arrival, either by an ACL or by local_scan().
8154 7. Added the smtp_incomplete_transaction log selector.
8156 8. After STARTTLS, Exim was not forgetting that it had advertised AUTH, so it
8157 was accepting AUTH without a new EHLO.
8159 9. Added tls_remember_esmtp to cope with YAEB. This allows AUTH and other
8160 ESMTP extensions after STARTTLS without a new EHLO, in contravention of the
8163 10. Logging of TCP/IP connections (when configured) now happens in the main
8164 daemon process instead of the child process, so that the TCP/IP connection
8165 count is more accurate (but it can never be perfect).
8167 11. The use of "drop" in a nested ACL was not being handled correctly in the
8168 outer ACL. Now, if condition failure induced by the nested "drop" causes
8169 the outer ACL verb to deny access ("accept" or "discard" after "endpass",
8170 or "require"), the connection is dropped.
8172 12. Similarly, "discard" in a nested ACL wasn't being handled. A nested ACL
8173 that yield "discard" can now be used with an "accept" or a "discard" verb,
8174 but an error is generated for any others (because I can't see a useful way
8175 to define what should happen).
8177 13. When an ACL is read dynamically from a file (or anywhere else), the lines
8178 are now processed in the same way as lines in the Exim configuration file.
8179 In particular, continuation lines are supported.
8181 14. Added the "dnslists = a.b.c!=n.n.n.n" feature.
8183 15. Added -ti meaning -t -i.
8185 16. Check for letters, digits, hyphens, and dots in the names of dnslist
8186 domains, and warn by logging if others are found.
8188 17. At least on BSD, alignment is not guaranteed for the array of ifreq's
8189 returned from GIFCONF when Exim is trying to find the list of interfaces on
8190 a host. The code in os.c has been modified to copy each ifreq to an aligned
8191 structure in all cases.
8193 Also, in some cases, the returned ifreq's were being copied to a 'struct
8194 ifreq' on the stack, which was subsequently passed to host_ntoa(). That
8195 means the last couple of bytes of an IPv6 address could be chopped if the
8196 ifreq contained only a normal sockaddr (14 bytes storage).
8198 18. Named domain lists were not supported in the hosts_treat_as_local option.
8199 An entry such as +xxxx was not recognized, and was treated as a literal
8202 19. Ensure that header lines added by a DATA ACL are included in the reject log
8203 if the ACL subsequently rejects the message.
8205 20. Upgrade the cramtest.pl utility script to use Digest::MD5 instead of just
8206 MD5 (which is deprecated).
8208 21. When testing a filter file using -bf, Exim was writing a message when it
8209 took the sender from a "From " line in the message, but it was not doing so
8210 when it took $return_path from a Return-Path: header line. It now does.
8212 22. If the contents of a "message" modifier for a "warn" ACL verb do not begin
8213 with a valid header line field name (a series of printing characters
8214 terminated by a colon, Exim now inserts X-ACL-Warn: at the beginning.
8216 23. Changed "disc" in the source to "disk" to conform to the documentation and
8217 the book and for uniformity.
8219 24. Ignore Sendmail's -Ooption=value command line item.
8221 25. When execve() failed while trying to run a command in a pipe transport,
8222 Exim was returning EX_UNAVAILABLE (69) from the subprocess. However, this
8223 could be confused with a return value of 69 from the command itself. This
8224 has been changed to 127, the value the shell returns if it is asked to run
8225 a non-existent command. The wording for the related log line suggests a
8226 non-existent command as the problem.
8228 26. If received_header_text expands to an empty string, do not add a Received:
8229 header line to the message. (Well, it adds a token one on the spool, but
8230 marks it "old" so that it doesn't get used or transmitted.)
8232 27. Installed eximstats 1.28 (addition of -nt option).
8234 28. There was no check for failure on the call to getsockname() in the daemon
8235 code. This can fail if there is a shortage of resources on the system, with
8236 ENOMEM, for example. A temporary error is now given on failure.
8238 29. Contrary to the C standard, it seems that in some environments, the
8239 equivalent of setlocale(LC_ALL, "C") is not obeyed at the start of a C
8240 program. Exim now does this explicitly; it affects the formatting of
8241 timestamps using strftime().
8243 30. If exiqsumm was given junk data, it threw up some uninitialized variable
8244 complaints. I've now initialized all the variables, to avoid this.
8246 32. Header lines added by a system filter were not being "seen" during
8247 transport-time rewrites.
8249 33. The info_callback() function passed to OpenSSL is set up with type void
8250 (*)(SSL *, int, int), as described somewhere. However, when calling the
8251 function (actually a macro) that sets it up, the type void(*)() is
8252 expected. I've put in a cast to prevent warnings from picky compilers.
8254 34. If a DNS black list lookup found a CNAME record, but there were no A
8255 records associated with the domain it pointed at, Exim crashed.
8257 35. If a DNS black list lookup returned more than one A record, Exim ignored
8258 all but the first. It now scans all returned addresses if a particular IP
8259 value is being sought. In this situation, the contents of the
8260 $dnslist_value variable are a list of all the addresses, separated by a
8263 36. Tightened up the rules for host name lookups using reverse DNS. Exim used
8264 to accept a host name and all its aliases if the forward lookup for any of
8265 them yielded the IP address of the incoming connection. Now it accepts only
8266 those names whose forward lookup yields the correct IP address. Any other
8267 names are discarded. This closes a loophole whereby a rogue DNS
8268 administrator could create reverse DNS records to break through a
8269 wildcarded host restriction in an ACL.
8271 37. If a user filter or a system filter that ran in a subprocess used any of
8272 the numerical variables ($1, $2 etc), or $thisaddress, in a pipe command,
8273 the wrong values were passed to the pipe command ($thisaddress had the
8274 value of $0, $0 had the value of $1, etc). This bug was introduced by
8275 change 4.11/101, and not discovered because I wrote an inadequate test. :-(
8277 38. Improved the line breaking for long SMTP error messages from ACLs.
8278 Previously, if there was no break point between 40 and 75 characters, Exim
8279 left the rest of the message alone. Two changes have been made: (a) I've
8280 reduced the minimum length to 35 characters; (b) if it can't find a break
8281 point between 35 and 75 characters, it looks ahead and uses the first one
8282 that it finds. This may give the occasional overlong line, but at least the
8283 remaining text gets split now.
8285 39. Change 82 of 4.11 was unimaginative. It assumed the limit on the number of
8286 file descriptors might be low, and that setting 1000 would always raise it.
8287 It turns out that in some environments, the limit is already over 1000 and
8288 that lowering it causes trouble. So now Exim takes care not to decrease it.
8290 40. When delivering a message, the value of $return_path is set to $sender_
8291 address at the start of routing (routers may change the value). By an
8292 oversight, this default was not being set up when an address was tested by
8293 -bt or -bv, which affected the outcome if any router or filter referred to
8296 41. The idea of the "warn" ACL verb is that it adds a header or writes to the
8297 log only when "message" or "log_message" are set. However, if one of the
8298 conditions was an address verification, or a call to a nested ACL, the
8299 messages generated by the underlying test were being passed through. This
8300 no longer happens. The underlying message is available in $acl_verify_
8301 message for both "message" and "log_message" expansions, so it can be
8302 passed through if needed.
8304 42. Added RFC 2047 interpretation of header lines for $h_ expansions, with a
8305 new expansion $bh_ to give the encoded byte string without charset
8306 translation. Translation happens only if iconv() is available; HAVE_ICONV
8307 indicates this at build time. HEADERS_CHARSET gives the charset to
8308 translate to; headers_charset can change it in the configuration, and
8309 "headers charset" can change it in an individual filter file.
8311 43. Now that we have a default RFC 2047 charset (see above), the code in Exim
8312 that creates RFC 2047 encoded "words" labels them as that charset instead
8313 of always using iso-8859-1. The cases are (i) the explicit ${rfc2047:
8314 expansion operator; (ii) when Exim creates a From: line for a local
8315 message; (iii) when a header line is rewritten to include a "phrase" part.
8317 44. Nasty bug in exiqsumm: the regex to skip already-delivered addresses was
8318 buggy, causing it to skip the first lines of messages whose message ID
8319 ended in 'D'. This would not have bitten before Exim release 4.14, because
8320 message IDs were unlikely to end in 'D' before then. The effect was to have
8321 incorrect size information for certain domains.
8323 45. #include "config.h" was missing at the start of the crypt16.c module. This
8324 caused trouble on Tru64 (aka OSF1) systems, because HAVE_CRYPT16 was not
8327 46. If there was a timeout during a "random" callout check, Exim treated it as
8328 a failure of the random address, and carried on sending RSET and the real
8329 address. If the delay was just some slowness somewhere, the response to the
8330 original RCPT would be taken as a response to RSET and so on, causing
8331 mayhem of various kinds.
8333 47. Change 50 for 4.20 was a heap of junk. I don't know what I was thinking
8334 when I implemented it. It didn't allow for the fact that some option values
8335 may legitimately be negative (e.g. size_addition), and it didn't even do
8336 the right test for positive values.
8338 48. Domain names in DNS records are case-independent. Exim always looks them up
8339 in lower case. Some resolvers return domain names in exactly the case they
8340 appear in the zone file, that is, they may contain uppercase letters. Not
8341 all resolvers do this - some return always lower case. Exim was treating a
8342 change of case by a resolver as a change of domain, similar to a widening
8343 of a domain abbreviation. This triggered its re-routing code and so it was
8344 trying to route what was effectively the same domain again. This normally
8345 caused routing to fail (because the router wouldn't handle the domain
8346 twice). Now Exim checks for this case specially, and just changes the
8347 casing of the domain that it ultimately uses when it transmits the message
8350 49. Added Sieve (RFC 3028) support, courtesy of Michael Haardt's contributed
8353 50. If a filter generated a file delivery with a non-absolute name (possible if
8354 no home directory exists for the router), the forbid_file option was not
8357 51. Added '&' feature to dnslists, to provide bit mask matching in addition to
8358 the existing equality matching.
8360 52. Exim was using ints instead of ino_t variables in some places where it was
8361 dealing with inode numbers.
8363 53. If TMPDIR is defined in Local/Makefile (default in src/EDITME is
8364 TMPDIR="/tmp"), Exim checks for the presence of an environment variable
8365 called TMPDIR, and if it finds it is different, it changes its value.
8367 54. The smtp_printf() function is now made available to local_scan() so
8368 additional output lines can be written before returning. There is also an
8369 smtp_fflush() function to enable the detection of a dropped connection.
8370 The variables smtp_input and smtp_batched_input are exported to
8373 55. Changed the default runtime configuration: the message "Unknown user"
8374 has been removed from the ACL, and instead placed on the localuser router,
8375 using the cannot_route_message feature. This means that any verification
8376 failures that generate their own messages won't get overridden. Similarly,
8377 the "Unrouteable address" message that was in the ACL for unverifiable
8378 relay addresses has also been removed.
8380 56. Added hosts_avoid_esmtp to the smtp transport.
8382 57. The exicyclog script was not checking for the esoteric option
8383 CONFIGURE_FILE_USE_EUID in the Local/Makefile. It now does this, but it
8384 will work only if exicyclog is run under the appropriate euid.
8386 58. Following a discussion on the list, the rules by which Exim recognises line
8387 endings on incoming messages have been changed. The -dropcr and drop_cr
8388 options are now no-ops, retained only for backwards compatibility. The
8389 following line terminators are recognized: LF CRLF CR. However, special
8390 processing applies to CR:
8392 (i) The sequence CR . CR does *not* terminate an incoming SMTP message,
8393 nor a local message in the state where . is a terminator.
8395 (ii) If a bare CR is encountered in a header line, an extra space is added
8396 after the line terminator so as not to end the header. The reasoning
8397 behind this is that bare CRs in header lines are most likely either
8398 to be mistakes, or people trying to play silly games.
8400 59. The size of a message, as listed by "-bp" or in the Exim monitor window,
8401 was being incorrectly given as 18 bytes larger than it should have been.
8402 This is a VOB (very old bug).
8404 60. This may never have affected anything current, but just in case it has:
8405 When the local host is found other than at the start of a list of hosts,
8406 the local host, those with the same MX, and any that follow, are discarded.
8407 When the list in question was part of a longer list of hosts, the following
8408 hosts (not currently being processed) were also being discarded. This no
8409 longer happens. I'm not sure if this situation could ever has previously
8412 61. Added the "/MX" feature to lists of hosts in the manualroute and query
8415 62. Whenever Exim generates a new message, it now adds an Auto-Submitted:
8416 header. This is something that is recommended in a new Internet Draft, and
8417 is something that is documented as being done by Sendmail. There are two
8418 possible values. For messages generated by the autoreply transport, Exim
8421 Auto-Submitted: auto-replied
8423 whereas for all other generated messages (e.g. bounces) it adds
8425 Auto-Submitted: auto-generated
8427 63. The "personal" condition in filters now includes a test for the
8428 Auto-Submitted: header. If it contains the string "auto-" the message it
8429 not considered personal.
8431 64. Added rcpt_include_affixes as a generic transport option.
8433 65. Added queue_only_override (default true).
8435 66. Added the syslog_duplication option.
8437 67. If what should have been the first header line of a message consisted of
8438 a space followed by a colon, Exim was mis-interpreting it as a header line.
8439 It isn't of course - it is syntactically invalid and should therefore be
8440 treated as the start of the message body. The misbehaviour could have
8441 caused a number of strange effects, including loss of data in subsequent
8442 header lines, and spool format errors.
8444 68. Formerly, the AUTH parameter on a MAIL command was trusted only if the
8445 client host had authenticated. This control can now be exercised by an ACL
8446 for more flexibility.
8448 69. By default, callouts do not happen when testing with -bh. There is now a
8449 variant, -bhc, which does actually run the callout code, including
8450 consulting and updating the callout cache.
8452 70. Added support for saslauthd authentication, courtesy of Alexander
8455 71. If statvfs() failed on the spool or log directories while checking their
8456 size for availability, Exim confusingly gave the error "space shortage".
8457 Furthermore, in debugging mode it crashed with a floating point exception.
8458 These checks are done if check_{spool,log}_{space,inodes} are set, and when
8459 an SMTP message arrives with SIZE= on the MAIL command. As this is a really
8460 serious problem, Exim now writes to the main and panic logs when this
8461 happens, with details of the failure. It then refuses to accept the
8462 incoming message, giving the message "spool directory problem" or "log
8463 directory problem" with a 421 code for SMTP messages.
8465 72. When Exim is about to re-exec itself, it ensures that the file descriptors
8466 0, 1, and 2 exist, because some OS complain for execs without them (see
8467 ChangeLog 4.05/30). If necessary, Exim opens /dev/null to use for these
8468 descriptors. However, the code omitted to check that the open succeeded,
8469 causing mysterious errors if for some reason the permissions on /dev/null
8470 got screwed. Now Exim writes a message to the main and panic logs, and
8471 bombs out if it can't open /dev/null.
8473 73. Re-vamped the way daemon_smtp_port, local_interfaces, and -oX work and
8474 interact so that it is all more flexible. It is supposed to remain
8475 backwards compatible. Also added extra_local_interfaces.
8477 74. Invalid data sent to a SPA (NTLM) server authenticator could cause the code
8478 to bomb out with an assertion failure - to the client this appears as a
8479 connection drop. This problem occurs in the part of the code that was taken
8480 from the Samba project. Fortunately, the assertion is in a very simple
8481 function, so I have fixed this by reproducing the function inline in the
8482 one place where it is called, and arranging for authentication to fail
8483 instead of killing the process with assert().
8485 75. The SPA client code was not working when the server requested OEM rather
8486 than Unicode encoding.
8488 76. Added code to make require_files with a specific uid setting more usable in
8489 the case where statting the file as root fails - usually a non-root-mounted
8490 NFS file system. When this happens and the failure is EACCES, Exim now
8491 forks a subprocess and does the per-uid checking as the relevant uid.
8493 77. Added process_log_path.
8495 78. If log_file_path was not explicitly set, a setting of check_log_space or
8496 check_log_inodes was ignored.
8498 79. If a space check for the spool or log partitions fails, the incident is now
8499 logged. Of course, in the latter case the data may get lost...
8501 80. Added the %p formatting code to string_format() so that it can be used to
8502 print addresses in debug_print(). Adjusted all the address printing in the
8503 debugging in store.c to use %p rather than %d.
8505 81. There was a concern that a line of code in smtp_in.c could overflow a
8506 buffer if a HELO/EHLO command was given followed by 500 or so spaces. As
8507 initially expressed, the concern was not well-founded, because trailing
8508 spaces are removed early. However, if the trailing spaces were followed by
8509 a NULL, they did not get removed, so the overflow was possible. Two fixes
8512 (a) I re-wrote the offending code in a cleaner fashion.
8513 (b) If an incoming SMTP command contains a NULL character, it is rejected
8516 82. When Exim changes uid/gid to the Exim user at daemon start time, it now
8517 runs initgroups(), so that if the Exim user is in any additional groups,
8518 they will be used during message reception.
8524 The change log for 4.20 and earlier releases has been archived.
git://git.exim.org / exim.git / blob